Novel metal nail sleeve for fixing thermal insulation layer

Abstract

The present invention relates to the technical field of construction mounting fasteners, and especially, to a novel metal nail sleeve for fixing a thermal insulation layer. The metal nail sleeve includes a nail sleeve body made of metal, and a fixed disk provided at one end of the nail sleeve body. The fixed disk has a central hole, the nail sleeve body has an axial through hole which is coaxial with the central hole, a guiding element is provided within the axial through hole, the guiding element has an axial hole which is configured to allow a front end of a nail to pass through and to accommodate a nail bar of the nail, the axial hole is coaxial with the axial through hole, the guiding element is made of materials with poor thermal conductivity. Compared with common metal nails, the nail sleeve is thicker, and after the nail sleeve is fit with the nail and combined with the fixed disk, the thermal insulation layer is able to be stably fixed to a wall body. Moreover, the nail sleeve body is a metal cylinder with variable diameter and has a higher strength. By providing the guiding member made of materials with poor thermal conductivity, it is possible to prevent poor heat preservation effects caused by heat exchange between the wall body and the exterior through the nail and the nail sleeve body due to direct contact between the metal nail and the metal nail sleeve body.

Description

BACKGROUND OF THE PRESENT INVENTION

Field of Invention

The present invention relates to the technical field of building installation nails, and more particularly to a metal nail sleeve for fixing a thermal insulation layer to a wall body.

Description of Related Arts

Usually, in the colder areas, the thermal insulation layer is also provided on the external wall of the building, and is generally fixed with nails. The nail bar of the metal nail is thinner, so the metal nail has low stability in fixing the thermal insulation layer. Therefore, the same area of thermal insulation layer needs more nails, which increases the cost. In order to solve this problem, plastic nails with low cost are used. The nail body of the plastic nails is thicker, so the plastic nails have better stability in fixing the thermal insulation layer. However, the plastic nails have a fatal defect, which is flammable, so there is a safety hazard. In order to solve this problem, the metal nail sleeve is sleeved outside the nail to fix the thermal insulation layer. If the inner wall of the metal nail sleeve is in direct contact with the nail, the nail which is directly connected to the wall body exchanges heat with the space outside the thermal insulation layer through the metal nail sleeve, and generally, the amount of nail sleeves and nails for fixing the thermal insulation layer is large, which leads to poor thermal insulation effect. If there is no contact between the nail bar and the inner wall of the nail sleeve, the nail bar may be bent when the front end of the nail is inserted into the wall body during the nailing process, causing that the front end of the nail is unable to be inserted into the wall body, so that the thermal insulation layer is unable to be fixed on the wall surface.

SUMMARY OF THE PRESENT INVENTION

In order to overcome deficiencies of the prior art, an object of the present invention is to provide a novel metal nail sleeve for fixing a thermal insulation layer. The metal nail sleeve has stable connection.

To achieve the above object, the present invention provides technical schemes as follows.

A novel metal nail sleeve for fixing a thermal insulation layer comprises a nail sleeve body made of metal, a fixed disk provided at one end of the nail sleeve body, wherein the fixed disk has a central hole, the nail sleeve body has an axial through hole which is coaxial with the central hole, a guiding element is provided within the axial through hole, the guiding element has an axial hole which is configured to allow a front end of a nail to pass through and to accommodate a nail bar of the nail, the axial hole is coaxial with the axial through hole, the guiding element is made of materials with poor thermal conductivity. While using, a front end of a front part of the nail is provided within a front end of the axial through hole, a section of the front part of the nail is provided within the axial hole, a rear portion of the nail and a nail cap are provided outside the nail sleeve. The nail refers to a common metal nail fired by a nail gun. During construction, the nail sleeve body and the front portion of the nail are inserted into the thermal insulation layer, the front end surface of the nail sleeve body is in contact with the surface of the wall body and is vertical to the wall body, a gun barrel of the nail gun is inserted into the central hole of the fixed disk, and at this time, the rear portion of the nail and the nail cap are located within the front portion of the gun barrel; the nail gun is started, the front portion of the nail is inserted into the wall body, the rear portion of the nail is located within the axial hole of the guiding element, and at this time, a diameter of the nail bar of the nail is slightly smaller than that of the axial hole, a diameter of the nail cap is larger than that of the axial hole, so that it is ensured that the rear portion of the nail bar of the nail is located within the guiding element, so as to connect the nail with the nail sleeve, thus the thermal insulation layer is fixed to the wall body through the nail and the nail sleeve.

Preferably, the axial through hole is defined by a first cylindrical part, a conical part and a second cylindrical part three of which are interconnected with the central hole, wherein a diameter of the first cylindrical part is equal to a maximum diameter of the conical part, a minimum diameter of the conical part is equal to a diameter of a second cylindrical part, and therefore, the nail sleeve body is actually a metal cylinder with variable diameter and has a higher strength.

Preferably, the nail sleeve body comprises n nail sleeve components assembled with each other, the fixed disk comprises n fan-shaped plates assembled with each other, wherein n first ends of the n nail sleeve components are fixedly connected with the n fan-shaped plates respectively, each of the n fan-shaped plates has a curved notch in a center thereof, n curved notches are combined together to form the central hole, and n≥2.

Preferably, two wedge-shaped plates are symmetrically set at two side walls of each of the nail sleeve components respectively, and an axis of symmetry of the two wedge-shaped plates is an axis of the axial through hole; each of the two wedge-shaped plates comprises a straight plate and an inclined plate, wherein one end of the straight plate is fixedly connected with one of the fan-shaped plates, and another end of the straight plate is connected with one end of the inclined plate as a whole; a distance between an inclined edge of the inclined plate and the axis of the axial through hole is decreased from the one end of the inclined plate which is connected with the straight plate to another end of the inclined plate which is connected with a second end of the each of the nail sleeve components; a front end portion of the two wedge-shaped plates combined together is defined as a tip part, which is convenient for inserting the nail sleeve body into the thermal insulation layer.

Preferably, the each of the nail sleeve components comprises a first curved plate, a conical plate and a second curved plate, wherein one end of the first curved plate is fixedly connected with the one of the fan-shaped plates, and the second curved plate is connected with the conical plate; two side walls of the first curved plate, the conical plate and the second curved plate are fixedly connected with the two wedge-shaped plates respectively.

Preferably, a curved through hole is provided between the first curved plate and the conical plate; an indented arm, which is integrated with the first curved plate, is provided at one end of the first curved plate which nears the curved through hole; a free end of the indented arm extends into the axial through hole and is buckled with an outer wall of the guiding element, so that during nailing, the guiding element is prevented from moving axially relative to the nail sleeve body.

Preferably, n first curved plates are assembled together to form the first cylindrical part, n conical plates are assembled together to form the conical part, and n second curved plates are assembled together to form the second cylindrical part.

Preferably, one connection plate, which is integrated with the one of the fan-shaped plates and is downwards inclined, is provided at a straight end surface of the one of the fan-shaped plates; the one connection plate is fixedly connected with a bottom surface of another of the fan-shaped plates adjacent to the one of the fan-shaped plates; another connection plate, which is integrated with the another of the fan-shaped plates and is downwards inclined, is provided at a straight end surface of the another of the fan-shaped plates; the another connection plate is fixedly connected with a bottom surface of the one of the fan-shaped plates; the one connection plate and the another connection plate are set in a staggered manner; while assembling, the straight end surface of the one of the fan-shaped plates is attached with the straight end surface of the another of the fan-shaped plates, the one connection plate and the another connection plate are staggered; through welding and riveting, two fan-shaped plates are fixed together.

Preferably, the guiding element comprises a disk body, an upper cylinder provided on an upper surface of the disk body, and a lower cylinder provided at a lower surface of the disk body three of which are integrated with each other; to prevent the guiding element in contact with the nail from transferring heat, the guiding element is made of materials with poor thermal conductivity, such as plastics.

Preferably, multiple reinforcing ribs, which are parallel to an axis of the guiding element, are provided at an outer wall of the lower cylinder, and a lower portion of each of the multiple reinforcing ribs has a slope.

Preferably, multiple upper reinforcing ribs, which are parallel to an axis of the guiding element, are provided at an outer wall of the upper cylinder, and an upper portion of each of the multiple upper reinforcing ribs has a slope.

Preferably, the upper cylinder is provided within the first cylindrical part, the disk body is exposed from the curved through hole, the lower cylinder is provided within the conical part, a surface of the lower portion of the each of the multiple reinforcing ribs is in contact with an inner wall of the conical part.

The present invention has beneficial effects as follows. While using, the front end of the front part of the nail is provided within the front end of the axial through hole, a section of the front part of the nail is provided within the axial hole, the rear portion of the nail and the nail cap are provided outside the nail sleeve. During construction, the nail sleeve body and the front portion of the nail are inserted into the thermal insulation layer, the front end surface of the nail sleeve body is in contact with the surface of the wall body and is vertical to the wall body, the gun barrel of the nail gun is inserted into the central hole of the fixed disk, and at this time, the rear portion of the nail and the nail cap are located within the front portion of the gun barrel; the nail gun is started, the front portion of the nail is inserted into the wall body, the rear portion of the nail is located within the axial hole of the guiding element, so that the nail is connected with the nail sleeve, thus the thermal insulation layer is fixed to the wall body through the nail and the nail sleeve. Compared with common metal nails, the nail sleeve is thicker, and after the nail sleeve is fit with the nail and combined with the fixed disk, the thermal insulation layer is able to be stably fixed to a wall body. Moreover, the nail sleeve body is a metal cylinder with variable diameter and has a higher strength. By providing the guiding member made of materials with poor thermal conductivity, it is possible to prevent poor heat preservation effects caused by heat exchange between the wall body and the exterior through the nail and the nail sleeve body due to direct contact between the metal nail and the metal nail sleeve body.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a stereogram of a metal nail sleeve for fixing a thermal insulation layer to a wall body according to a preferred embodiment of the present invention.

FIG. 2 is an exploded view of the metal nail sleeve according to the preferred embodiment of the present invention.

FIG. 3 is a first stereogram of a nail sleeve component of the metal nail sleeve.

FIG. 4 is a second stereogram of the nail sleeve component of the metal nail sleeve.

FIG. 5 is a stereogram of a guiding element of the metal nail sleeve.

FIG. 6 is a cross-sectional view of the nail sleeve and a nail when the nail is not inserted into a wall body.

FIG. 7 is a cross-sectional view of the nail sleeve and the nail when the nail is inserted into the wall body.

FIG. 8 shows the nail sleeve is in combination with the nail.

FIG. 9 is an initial state diagram during construction.

FIG. 10 is an use state diagram when the nail is inserted into the wall body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

In order to make those skilled in the art better understand the present invention, the present invention is further described in detail in combination with the accompanying drawings and embodiments as follows.

Referring to FIGS. 1-2 and 8, a novel metal nail sleeve for fixing a thermal insulation layer according to a preferred embodiment of the present invention is illustrated. The metal nail sleeve comprises a nail sleeve body 1, a fixed disk 2 provided at one end of the nail sleeve body 1, wherein the fixed disk 2 has a central hole 201, the nail sleeve body 1 has an axial through hole 101 which is coaxial with the central hole 201, a guiding element 3 is provided within the axial through hole 101, the guiding element 3 has an axial hole 301 which is configured to allow a front end of a nail 4 to pass through and to accommodate a nail bar of the nail 4, the axial hole 301 is coaxial with the axial through hole 101. The guiding element 3 is configured to separate the nail 4 from the nail sleeve body 1, so as to prevent the wall from exchanging heat with an outside world through the nail 4 and the nail sleeve body 1, which affects the thermal insulation effect. Therefore, the guiding element 3 is made of materials with poor thermal conductivity, such as plastics.

The guiding element 3 is provided within the nail sleeve body 1, so that even in the event of fire, the guiding element 3 does not catch fire and burst. The guiding element 3 is also configured to limit the radial displacement of the nail 4. The nail bar of the nail 4 is generally thin. When the nail 4 is inserted into the wall body, the nail bar may be bent and deformed, so that the front end of the nail 4 is unable to be driven into the wall body. An inner wall of the guiding element 3 where the axial hole 301 is provided is able to prevent the nail from bending and to ensure that the front end of the nail is driven into the wall body.

Referring to FIG. 2, according the preferred embodiment of the present invention, the axial through hole 101 is defined by a first cylindrical part, a conical part and a second cylindrical part three of which are interconnected with the central hole 201, wherein a diameter of the first cylindrical part is equal to a maximum diameter of the conical part, a minimum diameter of the conical part is equal to a diameter of a second cylindrical part. Therefore, the nail sleeve body 1 is actually a metal cylinder with variable diameter and has a higher strength. The guiding element 3 is provided within the first cylindrical part and the conical part.

Referring to FIGS. 2 to 4, the nail sleeve body 1 comprises two nail sleeve components 1a assembled with each other, that is, n=2; accordingly, the fixed disk 2 comprises two fan-shaped plates 2a assembled with each other, wherein two first ends of the two nail sleeve components 1a are fixedly connected with two fan-shaped plates 2a respectively, each of the two fan-shaped plates 2a has a curved notch 201a in a center thereof, the central hole 201 is defined by two curved notches 201a which are combined together. At this time, a central angle of the each of the two fan-shaped plates 2a is 180°, that is, the each of the two fan-shaped plates 2a is half round.

Referring to FIG. 4, two wedge-shaped plates 5 are symmetrically set at two side walls of the each of the two nail sleeve components 1a respectively, and an axis of symmetry of the two wedge-shaped plates 5 is an axis of the axial through hole 101. To better understand the present invention, the two wedge-shaped plates 5 are described as follows. Each of the two wedge-shaped plates 5 comprises a straight plate 501 and an inclined plate 502, wherein one end of the straight plate 501 is fixedly connected with one of the two fan-shaped plates 2a, and another end of the straight plate 501 is connected with one end of the inclined plate 502 as a whole; a distance between an inclined edge of the inclined plate 502 and the axis of the through hole 101 is decreased from the one end of the inclined plate 502 which is connected with the straight plate 501 to another end of the inclined plate 502 which is connected with a second end of the each of the two nail sleeve components 1a, that is, the second cylindrical section. Obviously, a front end portion of the two wedge-shaped plates 5 combined together is defined as a tip part, which is convenient for inserting the nail sleeve body 1 into the thermal insulation layer. The wedge-shaped plates 5 here have a strengthening effect, that is, it is used to increase the strength of the nail sleeve body 1.

As show in FIG. 4, the each of the two nail sleeve components 1a comprises a first curved plate 101a, a conical plate 101b and a second curved plate 101c, wherein one end of the first curved plate 101a is fixedly connected with the one of the two fan-shaped plates 2a, and the second curved plate 101c is connected with the conical plate 101b; an arc central angle of the first and second curved plates 101a, 101c is 180°, that is, the first and second curved plates 101a, 101c are half rounds. The first curved plate 101a, the conical plate 101b and the second curved plate 101c are a whole; the each of the two fan-shaped plates 2a and the each of the two nail sleeve components 1a are also a whole; two side walls of the first curved plate 101a, the conical plate 101b and the second curved plate 101c are fixedly connected with the two wedge-shaped plates 5 respectively. When the two nail sleeve components 1a are assembled, the two wedge-shaped plates 5 which are symmetrically set at the two side walls of one of the two nail sleeve components 1a, are attached with the two wedge-shaped plates 5 which are symmetrically set at the two side walls of another of the two nail sleeve components 1a respectively. By welding, riveting and other processes, these four wedge-shaped plates 5 are fixed together. Therefore, it is able to be known that two first curved plates 101a assembled with each other form the first cylindrical part, two conical plates 101b assembled with each other form the conical part, and two second curved plates 101c assembled with each other form the second cylindrical part.

Preferably, the axial through hole 101 is a cylindrical hole for providing a space to allow the nail to pass through and for fixedly installing the guiding element 3. Therefore, it is able to be a hole with various shapes, such as a square cylindrical hole and an elliptic cylindrical hole. Considering the convenience of processing and space utilization, the axial through hole 101 is preferably a cylindrical hole.

Referring to FIGS. 1 and 3, a curved through hole 101d is provided between the first curved plate 101a and the conical plate 101b; an indented arm 6, which is integrated with the first curved plate 101a, is provided at one end of the first curved plate 101a which nears the curved through hole 101d; a free end of the indented arm 6 extends into the axial through hole 101 and is buckled with an outer wall of the guiding element 3, so that during nailing, the guiding element 3 is prevented from moving axially relative to the nail sleeve body 1.

As shown in FIGS. 1 and 2, in order to firmly assemble the two fan-shaped plates 2a together to form the fixed disk 2, a connection plate 7, which is integrated with the one of the two fan-shaped plates 2a and is downwards inclined, is provided at a straight end surface of the one of the two fan-shaped plates 2a; the connection plate 7 is fixedly connected with a bottom surface of another of the two fan-shaped plates 2a. Similarly, another connection plate 7, which is integrated with the another of the two fan-shaped plates 2a and is downwards inclined, is provided at a straight end surface of the another of the two fan-shaped plates 2a; the another connection plate 7 is fixedly connected with a bottom surface of the one of the two fan-shaped plates 2a. The two connection plates 7 are set in a staggered manner. While assembling, the straight end surface of the one of the two fan-shaped plates 2a is attached with the straight end surface of the another of the two fan-shaped plates 2a, the two connection plates 7 are just staggered. Through welding and riveting, the two fan-shaped plates 2a are fixed together.

The above preferred embodiment of the present invention discloses that the nail sleeve body 1 comprises two nail sleeve components 1a assembled with each other, namely, n=2; accordingly, the fixed disk 2 comprises two fan-shaped plates 2a assembled with each other, wherein two first ends of the two nail sleeve components 1a are fixedly connected with two fan-shaped plates 2a respectively. Obviously, on the basis of the preferred embodiment of the present invention, it is easy for those skilled in the art to think that the nail sleeve body 1 also comprises three or more nail sleeve components 1a; a central angle of a cross section of each nail sleeve component 1a is equal to 360°/n, n≥3; and accordingly, the fixed disk 2 comprises three or more fan-shaped plates 2a assembled with each other, a central angle of a cross section of each fan-shaped plate 2a is 360°/n, n≥3. For example, when there are three nail sleeve components 1a and three fan-shaped plates 2a, the central angle thereof is 120°.

Referring to FIGS. 2 and 5, the guiding element 3 comprises a disk body 301′, an upper cylinder 302 provided on an upper surface of the disk body 301′, and a lower cylinder 303 provided at a lower surface of the disk body 301′ three of which are integrated with each other. To prevent the guiding element 3 in contact with the nail 4 from transferring heat, the guiding element 3 is made of materials with poor thermal conductivity, such as plastics.

As shown in FIG. 5, multiple reinforcing ribs 304, which are parallel to an axis of the guiding element, are provided at an outer wall of the lower cylinder 303, and a lower portion of each of the multiple reinforcing ribs 304 has a slope 304a. An amount of the multiple reinforcing ribs 304 is not limited, and generally, is determined as required. The multiple reinforcing ribs 304 are integrated with the lower cylinder 303, that is, no any connectors are provided between the multiple reinforcing ribs 304 and the lower cylinder 303.

Multiple upper reinforcing ribs 305, which are parallel to the axis of the guiding element, are provided at an outer wall of the upper cylinder 302, and an upper portion of each of the multiple upper reinforcing ribs 305 has a slope. An amount of the multiple upper reinforcing ribs 305 is not limited, and generally, is determined as required. The multiple upper reinforcing ribs 305 are integrated with the upper cylinder 302, that is, no any connectors are provided between the multiple upper reinforcing ribs 305 and the upper cylinder 302.

The upper cylinder 302 is provided within the first cylindrical part, the disk body 301′ is exposed from the curved through hole 101d, the lower cylinder 303 is provided within the conical part, a surface of the lower portion of the each of the multiple reinforcing ribs 304 is in contact with an inner wall of the conical part.

Referring to FIG. 6, while using, a front end of a front part of the nail 4 is provided within the front end (the second cylindrical part) of the axial through hole 101, a section of the front part of the nail 4 is provided within the axial hole 301, a rear portion of the nail and a nail cap are provided outside the nail sleeve. The nail 4 refers to a common metal nail fired by a nail gun. Referring to FIG. 9, during construction, the nail sleeve body 1 and the front portion of the nail 4 are inserted into a thermal insulation layer 8, the front end surface of the nail sleeve body 1 is in contact with the surface of the wall body and is vertical to the wall body, a gun barrel 10 of the nail gun is inserted into the central hole of the fixed disk 2, and at this time, the rear portion of the nail 4 and the nail cap are located within the front portion of the gun barrel 10; the nail gun is started, the front portion of the nail 4 is inserted into the wall body, the rear portion of the nail is located within the axial hole of the guiding element 3, and at this time, a diameter of the nail bar of the nail is slightly smaller than that of the axial hole, a diameter of the nail cap is larger than that of the axial hole, so that it is ensured that the rear portion of the nail bar of the nail is located within the guiding element 3, so as to connect the nail 4 with the nail sleeve, thus the thermal insulation layer 8 is fixed to the wall body 9 through the nail 4 and the nail sleeve, as shown in FIGS. 7 and 10.

In the above description, it should be noted that the orientation or position relationship indicated by the terms “center”, “vertical”, “front”, “rear”, “bottom”, “inner”, “outer”, etc., is based on the orientation or position relationship shown in the attached drawings, which is only for facilitating the description of the present invention and simplifying the description. It is not indicated or implied that the device or element referred to must have a specific orientation, construction and operation in a specific orientation, and therefore is unable to be understood as a limitation of the present invention. The terms “installation”, “connection”, “interconnection” should be understood broadly, such as fixed connection, detachable connection, or integrated connection. Moreover, the connection is able to be direct connection, indirect connection through an intermediate medium, or interconnection within two components. For those skilled in the art, the specific meaning of the above terms in the present invention is able to be understood in specific circumstances.

Although the present invention is explained by embodiments, those skilled in the art should understand that the embodiments have many deformations and changes without deviating from the spirit of the present invention. The attached claims include these deformations and changes without deviating from the spirit of the present invention.

Claims

1. A metal nail sleeve for fixing a thermal insulation layer, the metal nail sleeve comprising a nail sleeve body made of metal, a fixed disk provided at one end of the nail sleeve body, wherein: the fixed disk has a central hole, the nail sleeve body has an axial through hole which is coaxial with the central hole, a guiding element is provided within the axial through hole, the guiding element has an axial hole which is configured to allow a front end of a nail to pass through and to accommodate a nail bar of the nail, the axial hole is coaxial with the axial through hole, the guiding element is made of materials with poor thermal conductivity.

2. The metal nail sleeve for fixing the thermal insulation layer according to claim 1, wherein the axial through hole is defined by a first cylindrical part, a conical part and a second cylindrical part three of which are interconnected with the central hole, wherein a diameter of the first cylindrical part is equal to a maximum diameter of the conical part, a minimum diameter of the conical part is equal to a diameter of a second cylindrical part, and the nail sleeve body is a metal cylinder with variable diameter.

3. The metal nail sleeve for fixing the thermal insulation layer according to claim 2, wherein the nail sleeve body comprises n nail sleeve components assembled with each other, the fixed disk comprises n fan-shaped plates assembled with each other, wherein n first ends of the n nail sleeve components are fixedly connected with the n fan-shaped plates respectively, each of the n fan-shaped plates has a curved notch in a center thereof, n curved notches are combined together to form the central hole, and n≥2.

4. The metal nail sleeve for fixing the thermal insulation layer according to claim 3, wherein two wedge-shaped plates are symmetrically set at two side walls of each of the nail sleeve components respectively; each of the two wedge-shaped plates comprises a straight plate and an inclined plate, wherein one end of the straight plate is fixedly connected with one of the fan-shaped plates, and another end of the straight plate is connected with one end of the inclined plate as a whole; a distance between an inclined edge of the inclined plate and the axis of the axial through hole is decreased from the one end of the inclined plate which is connected with the straight plate to another end of the inclined plate which is connected with a second end of the each of the nail sleeve components.

5. The metal nail sleeve for fixing the thermal insulation layer according to claim 4, wherein the each of the nail sleeve components comprises a first curved plate, a conical plate and a second curved plate, wherein one end of the first curved plate is fixedly connected with the one of the fan-shaped plates, and the second curved plate is connected with the conical plate; two side walls of the first curved plate, the conical plate and the second curved plate are fixedly connected with the two wedge-shaped plates respectively.

6. The metal nail sleeve for fixing the thermal insulation layer according to claim 5, wherein a curved through hole is provided between the first curved plate and the conical plate; an indented arm, which is integrated with the first curved plate, is provided at one end of the first curved plate which nears the curved through hole; a free end of the indented arm extends into the axial through hole.

7. The metal nail sleeve for fixing the thermal insulation layer according to claim 5, wherein n first curved plates are assembled together to form the first cylindrical part, n conical plates are assembled together to form the conical part, and n second curved plates are assembled together to form the second cylindrical part.

8. The metal nail sleeve for fixing the thermal insulation layer according to claim 5, wherein one connection plate, which is integrated with the one of the fan-shaped plates and is downwards inclined, is provided at a straight end surface of the one of the fan-shaped plates; the one connection plate is fixedly connected with a bottom surface of another of the fan-shaped plates adjacent to the one of the fan-shaped plates.

9. The metal nail sleeve for fixing the thermal insulation layer according to claim 6, wherein the guiding element comprises a disk body, an upper cylinder provided on an upper surface of the disk body, and a lower cylinder provided at a lower surface of the disk body three of which are integrated with each other.

10. The metal nail sleeve for fixing the thermal insulation layer according to claim 9, wherein multiple reinforcing ribs, which are parallel to an axis of the guiding element, are provided at an outer wall of the lower cylinder, and a lower portion of each of the multiple reinforcing ribs has a slope.

11. The metal nail sleeve for fixing the thermal insulation layer according to claim 10, wherein multiple upper reinforcing ribs, which are parallel to the axis of the guiding element, are provided at an outer wall of the upper cylinder, and an upper portion of each of the multiple upper reinforcing ribs has a slope.

12. The metal nail sleeve for fixing the thermal insulation layer according to claim 11, wherein the upper cylinder is provided within the first cylindrical part, the disk body is exposed from the curved through hole, the lower cylinder is provided within the conical part, a surface of the lower portion of the each of the multiple reinforcing ribs is in contact with an inner wall of the conical part.