Patent Application
20240328316
The present disclosure relates to a hybrid-type rock splitting packer using water pressure and rubber inflation pressure. More specifically, the present disclosure relates to a hybrid-type rock splitting packer using water pressure and rubber inflation pressure, the hybrid-type rock splitting packer being for efficiently splitting a rock by sealing the rock with a packer unit and a crack expansion unit, generating pre-cracks and expanding existing cracks in the rock using water pressure through a water pressure supply control unit, and then expanding the generated cracks using rubber inflation pressure through the crack expansion unit.
Recently, as the need for creation of urban space increases, the importance of developing underground space is increasing. In Korea, since the rock layer is shallow, an underground rock excavation is essential for the development of the underground space.
However, a traditional rock excavation using explosives or rock crushers generates a lot of noises and vibrations. The noise generated during the rock excavation can be a cause of civil complaints. Additionally, the vibration generated during the excavation can weaken the surrounding ground, causing it to collapse and causing cracks in facilities and buildings.
Currently, vibration-free rock splitting methods are used to reduce the noise and the vibration when excavating rock. However, these vibration-free rock splitting methods have problems such as a significant decrease in progress speed, which is the efficiency of rock crushing work, and severe restrictions due to the actual working environment.
Therefore, in order to minimize a damage caused by the noise and the vibration generated during the rock excavation, rock excavation equipment and methods with low noise and low vibration have been required. Additionally, the research is being actively conducted to simplify the excavation process in order to save the time and the cost required for excavation.
The present disclosure has been made in an effort to solve the problems described above, and an objective of the present disclosure is to provide a hybrid-type rock splitting packer using water pressure and rubber inflation pressure, the hybrid-type rock splitting packer being for efficiently splitting a rock by generating pre-cracks and expanding existing cracks in a rock using water pressure through a water pressure supply control unit and then expanding the generated cracks using rubber inflation pressure through a crack expansion unit.
Another objective of the present disclosure is to provide a hybrid-type rock splitting packer using water pressure and rubber inflation pressure, the hybrid-type rock splitting packer being for increasing the contact area with a rock and improving the sealing ability by firmly sealing the inner side of a rock by inflating a holder through forward movement of the wedge-type cylinder rod due to hydraulic pressure or water pressure and by also inflating rubbers by hydraulic pressure or water pressure.
The objects of the embodiments of the present disclosure are not limited to the purposes mentioned above, and other objects, which are not mentioned above, will be clearly understood by those skilled in the art from the description below.
According to one aspect of the present invention so as to accomplish these objects, there is provided to a hybrid-type rock splitting packer using water pressure and rubber inflation pressure, the hybrid-type rock splitting packer including: a packer unit; a water pressure supply control unit including a water pressure pipe and first spray holes spaced a predetermined distance apart from each other at a longitudinal center of the water pressure pipe and supplying water at a predetermined level to the first spray holes through the water pressure pipe; a contraction pressure supply unit including a contraction pressure pipe installed at a predetermined distance from a side of the water pressure pipe and supplying hydraulic pressure or water pressure at a predetermined level to the contraction pressure pipe; an inflation pressure supply unit including an inflation pressure pipe installed at a predetermined distance from the other side of the water pressure pipe and hydraulic pressure or water pressure at a predetermined level to the inflation pressure pipe; and a crack expansion unit connected with the packer unit.
In addition, according to an embodiment of the present invention, the packer unit further includes a cylinder tube including the contraction pressure pipe and the inflation pressure pipe; a piston disposed in the cylinder tube, being in contact with hydraulic pressure or water pressure supplied to the cylinder tube at a side thereof, and being longitudinally moved by the hydraulic pressure or water pressure; a wedge-type cylinder rod being in contact with the other side of the piston and being longitudinally moved by pressure applied by the piston; a holder disposed at a side on an outer circumferential surface of the packer unit and expanding in a width direction when the wedge-type cylinder rod is inserted along an inner circumferential surface of the cylinder rod cover formed on a side of the piston; and a holder separation tab disposed on a side of the cylinder rod cover to smoothly induce separation of the holder fitted in the wedge-type cylinder rod when the wedge-type cylinder rod is moved backward.
In addition, according to an embodiment of the present invention, the contraction pressure pipe and the inflation pressure pipe are formed to reciprocate longitudinally in the packer unit, whereby the piston is manufactured in a double acting type enabling forward movement and backward movement in the longitudinal direction.
In addition, according to an embodiment of the present invention, the contraction pressure pipe and the inflation pressure pipe further include an inflation pressure inlet installed on a side of the packer unit and a contraction pressure inlet installed on the other side of the packer unit.
In addition, according to an embodiment of the present invention, the material of the holder is urethane resin mixed with rubber.
In addition, according to an embodiment of the present invention, the holder separation tab is formed from a side of the cylinder rod cover to a side of a longitudinal center of the wedge-type cylinder rod, and when wedge-type cylinder rod is moved backward and the holder is fitted in and moved backward together with the wedge-type cylinder rod, an end of the holder separation tab supports an end of the holder, whereby the holder is smoothly separated from the wedge-type cylinder rod.
In addition, according to an embodiment of the present invention, the crack expansion unit includes an expansion supply pipe connected with the contraction pressure pipe or the inflation pressure pipe, being supplied with hydraulic pressure or water pressure at a predetermined level from the contraction pressure pipe or the inflation pressure pipe, and supplying the hydraulic pressure or water pressure to second spray holes longitudinally spaced a predetermined distance apart from each other; a first rubber disposed around the expansion supply pipe; a separation space formed between the expansion supply pipe and the first rubber; a second rubber disposed around the first rubber; a third rubber disposed around the second rubber; and a first coupling socket supporting both ends of the first rubber and the second rubber, and when hydraulic pressure or water pressure supplied from the contraction pressure pipe or the inflation pressure pipe flows in the separation space through the second spray holes, the crack expansion unit sequentially pressurizes the first rubber, the second rubber, and the third rubber and inflates toward a rock.
In addition, according to an embodiment of the present invention, a second coupling socket supporting the circumferential portions of both sides of the second rubber is further disposed between both ends of the third rubber and an inner end of the first coupling socket.
According to the hybrid-type rock splitting packer using water pressure and rubber inflation pressure, there is an effect of efficiently splitting a rock by generating pre-cracks and expanding existing cracks in the rock using water pressure through the water pressure supply control unit and then expanding the generated cracks using rubber inflation pressure through the crack expansion unit.
Further, there is an effect of increasing the contact area with a rock and improving the sealing ability by firmly sealing the inner side of the rock by inflating the holder through forward movement of the wedge-type cylinder rod and by also inflating rubbers by hydraulic pressure or water pressure.
The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
The following objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.
Rather, the embodiments introduced herein are provided so that the disclosure will be complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.
The embodiments described and illustrated herein also include complementary embodiments thereof.
The singular expression includes plural expressions unless it is apparently different in the context. As used in the specification, ‘comprise’ and/or ‘comprising’ do not exclude the presence or addition of one or more other elements.
Hereinafter, the present invention will be described in detail with reference to the drawings. In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, readers who have sufficient knowledge in the field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts commonly known but largely unrelated to the invention are not described in order to prevent confusion in describing the invention.
As shown in
The packer unit (100) is made of a stainless material in a cylindrical shape.
The packer unit (100) includes, in a broad meaning, a piston (101), a cylinder tube (102), a wedge-shape cylinder rod (110), a cylinder rod cover (120), a holder (130), and a holder separation tab (140).
The piston (101) is disposed in a cylinder tube (102) including a contraction pressure pipe (310) and an inflation pressure pipe (410), is in contact with hydraulic pressure or water pressure supplied to the cylinder tube (102) at one side thereof, and is longitudinally moved by hydraulic pressure or water pressure.
The piston (101) is provided in any one state of a vacuum state or a semi vacuum state and can control the intensity of hydraulic pressure or water pressure.
Further, it should be noted that the piston (101) has a pressurizing body on the one side, so there is an effect that when the piston (101) is longitudinally moved by inflation and contraction by hydraulic pressure or water pressure, the piston (101) can move forward and backward and can apply strong pressure.
Further, the wedge-type cylinder rod (110) is in contact with the other side of the piston (101) and is longitudinally moved by pressure applied by the piston (101).
Meanwhile, one side of the wedge-type cylinder rod (110) is formed in a conical wedge shape and the end of the one side of the wedge-type cylinder rod (110) may be positioned to be in contact with one side of the holder (130) to be described below or may be inserted by a predetermined length into an inside end of the holder (130).
The other side of the wedge-type cylinder rod (110) is formed to be in contact with the other side of the piston (101). Since the wedge-type cylinder rod (110) is in contact with the other side of the piston (101), while moving in the longitudinal direction of the piston (101), the wedge-type cylinder rod (110) is inserted into the inside end of the holder (130) to be described below along the inner circumferential surface of the cylinder rod cover (120) formed on the one side of the piston (101) while longitudinally moving.
The holder (130) is manufactured in a cylindrical shape, is disposed at a side on the outer circumferential surface of the packer unit (100), and expands in the width direction when the wedge-type cylinder rod (110) is inserted along the inner circumferential surface of the cylinder rod cover (120), thereby sealing the inner side of a rock (B).
In this configuration, the material of the holder (130) may be urethane resin mixed with rubber.
The holder (130) expands or contracts in the width direction, depending on the insertion length of the wedge-type cylinder rod (110). The holder (130) seals the inner side of the rock (B) and the wedge-type cylinder rod (110) prevents contraction of the holder (130) by supporting the bottom of the holder (130), whereby there is an effect of more firmly sealing the inner side of the rock (B).
That is, the holder (130) is separate from the packer unit (100), and when hydraulic pressure or water pressure is provided to the piston (101), the piston (101) pressurizes the one side of the wedge-type cylinder rod (110) and the wedge-type cylinder rod (110) is inserted into the lower portion of the holder (130) along the inner circumferential surface of the cylinder rod cover (120), and then the holder (130) expands in the width direction identical to the conical shape of the wedge-type cylinder rod (110), thereby firmly sealing the inner side of the rock B.
As shown in
In more detail, the holder separation tab (140) is formed from a side of the cylinder rod cover (120) to a side of the longitudinal center of the wedge-type cylinder rod (110), and when the holder (130) is fitted in and moved backward together with the wedge-type cylinder rod (110), the end of the holder separation tab (140) supports the end of the holder (130), thereby serving to smoothly separate the holder (130) from the wedge-type cylinder rod (110).
That is, since the holder separation tab (140) is provided, when the wedge-type cylinder rod (110) is moved backward, the holder separation tab (140) can support the end of the holder (130), so the holder (130) can be smoothly separated from the wedge-type cylinder rod (110).
As a result, there is an effect that the holder separation tab (140) can contribute to smoothly separating the holder (130) from the wedge-type cylinder rod (110) simultaneously with backward movement of the wedge-type cylinder rod (110) and that it is possible to easily remove the packer unit (100) from a bored hole by contracting the holder (130) in the width direction.
Further, it should be noted that the holder separation tab (140) may be manufactured in a cylindrical shape, but the holder separation tab (140) is not limited thereto and may be manufactured in various shapes to be able to support the end of the holder (130) by those skilled in the art.
In this configuration, the holder separation tab (140) may be integrally manufactured with a side of the cylinder rod cover (120) or may be separately manufactured and attached by an adhesive means such as welding.
The holder separation tab (140) is made of a steel material and can firmly support and separate the end of the holder (130) made of urethane resin, etc.
Further, it is preferable that a longitudinal stroke of the wedge-type cylinder rod (110) is 12 to 30 cm.
When the longitudinal stroke of the wedge-type cylinder rod (110) is less than 12 cm, the wedge-type cylinder rod (110) is not inserted by a predetermined length into the lower portion of the holder (130) along the inner circumferential surface of the cylinder rod cover (120), so there is a problem that the holder (130) does not expand by an appropriate length in the width direction and, accordingly, the holder (130) cannot seal the inner side of the rock (B). When the longitudinal stroke of the wedge-type cylinder rod (110) exceeds 30 cm, the wedge-type cylinder rod (110) is inserted over a predetermined length into the lower portion of the holder (130) along the inner circumferential surface of the cylinder rod cover (120), so there is a problem that the holder (130) is damaged or excessively seals the inside of the rock by expanding over a predetermined length in the width direction and, accordingly, the holder (130) does not resist pressure and is damaged. Therefore, it is preferable that the longitudinal stroke of the wedge-type cylinder rod (110) is 12 to 30 cm.
The water pressure supply control unit (200) has a water pressure pipe (210) longitudinally formed in the packer unit (100) and first spray holes (220) spaced a predetermined distance apart from each other at the longitudinal center of the water pressure pipe (210), and supplies water pressure at a predetermined level to the first spray holes (220) through the water pressure pipe (210).
In more detail, the water pressure supply control unit (200) has a water pressure pipe (210) installed longitudinally through the center in the packer unit (100), supplies water pressure at a predetermined level to the water pressure pipe (210), supplies water pressure at a predetermined level to the first spray holes (220), and applies water pressure toward the rock (B), thereby cracking the rock (B) through water pressure.
In this configuration, the water pressure supply control unit (200) may have a separate water pressure controller (not shown) that controls the water pressure that is transmitted to the water pressure pipe (210), and can provide appropriate water pressure by controlling water pressure, flow speed, etc., which are applied to the water pressure pipe (210), through the water pressure controller (not shown).
Meanwhile, a plurality of first spray holes (220) may be installed in the longitudinal direction and the width direction of the water pressure pipe (210), may be manufactured in various shapes with various diameters, and is installed eccentrically at a predetermined angle, whereby the first spray holes (220) may be installed in consideration of the base, the crack state, etc. of the rock (B).
The contraction pressure supply unit (300) has a contraction pressure pipe (310) installed at a predetermined distance from a side of the water pressure pipe (210) and supplies hydraulic pressure or water pressure at a predetermined level to the contraction pressure pipe (310).
The inflation pressure supply unit (400) has an inflation pressure pipe (410) installed at a predetermined distance from the other side of the water pressure pipe (210) and supplies hydraulic pressure or water pressure at a predetermined level to the inflation pressure pipe (410).
In this configuration, the contraction pressure pipe (310) and the inflation pressure pipe (410) are formed to reciprocate longitudinally in the packer unit (100), whereby the piston (101) is manufactured in a double acting type enabling forward movement and backward movement in the longitudinal direction.
Further, since an inflation pressure inlet (420) through which hydraulic pressure or water pressure flows in is installed on a side of the packer unit (100) and a contraction pressure inlet (430) reducing hydraulic pressure or water pressure is installed on the other side of the packer unit (100), the contraction pressure pipe (310) and the inflation pressure pipe (410) can repeat inflation and contraction by hydraulic pressure or water pressure.
The crack expansion unit (500) is connected with the packer unit (100).
The crack expansion unit (500) includes, in a broad meaning, an expansion supply pipe (510), a first rubber (520), a separation space (530), a second rubber (540), a first coupling socket (550), and a third rubber (560).
In more detail, the crack expansion unit (500) includes: an expansion supply pipe (510) connected with the contraction pressure pipe (310) or the inflation pressure pipe (410), being supplied with hydraulic pressure or water pressure at a predetermined level from the contraction pressure pipe (310) or the inflation pressure pipe (410), and supplying the hydraulic pressure or water pressure to second spray holes (511) longitudinally spaced a predetermined distance apart from each other; a first rubber (520) disposed around the expansion supply pipe (510); a separation space (530) formed between the expansion supply pipe (510) and the first rubber (520); a second rubber (540) disposed around the first rubber (520); a third rubber (560) disposed around the second rubber (540); and a first coupling socket (550) supporting both ends of the first rubber (520), the second rubber (540), and the third rubber (560).
The expansion supply pipe (510) is connected with the contraction pressure pipe (310) or the inflation pressure pipe (410) and extends by a predetermined length through the center of the first coupling socket (550).
A plurality of second spray holes (511) may be installed in the longitudinal direction and the width direction of the expansion supply pipe (510), may be formed in various shapes with various diameters, and may be installed eccentrically at a predetermined angle.
The first rubber (520) is provided in correspondence to the length of the expansion supply pipe (510), and both ends of the first rubber (520) support the inner end of the first coupling socket (550).
In this configuration, both ends of the first rubber (520) may be fixed to the inner end of the first coupling socket (550) through thread-fastening.
The separation space (530) is formed between the expansion supply pipe (510) and the first rubber (520).
In more detail, the separation space (530) is formed by removing a portion of the inner side of the first rubber (520), whereby the separation space (530) is formed between the expansion supply pipe (510) and the first rubber (520).
In this configuration, the length of the separation space (530) may be the same as or greater than the length of the expansion supply pipe (510), but it is preferable that the separation space (530) is manufactured in a length smaller than the length of the expansion supply pipe (510) and prevents leakage of hydraulic pressure or water pressure that flows in through the second spray holes (511).
The second rubber (540) is disposed around the first rubber (520).
The second rubber (540) is manufactured in a length greater than the length of the first rubber (520), whereby the second rubber (540) surrounds the first rubber (520) and both ends of the second rubber (540) support the inner end of the first coupling socket (550).
In this configuration, both ends of the second rubber (540) may be fixed to the inner end of the first coupling socket (550) through thread-fastening.
Meanwhile, the third rubber (560) is further disposed around the second rubber (540).
The third rubber (560) is formed in a length smaller than the length of the second rubber (540) and is positioned at the center of the second rubber (540).
In this configuration, a second coupling socket (570) supporting the circumferential portions of both sides of the second rubber (540) is further disposed between both ends of the third rubber (560) and the inner end of the first coupling socket (550).
As a result, the second coupling socket (570) supports both ends of the third rubber (560) while supporting the circumferential portions of both sides of the second rubber (540).
When hydraulic pressure or water pressure supplied from the contraction pressure pipe (310) or the inflation pressure pipe (410) flows into the separation space (530) through the second spray holes (511), the crack expansion unit (500) sequentially pressurizes the first rubber (520), the second rubber (540), and the third rubber (560) and inflates toward the rock (B).
In this configuration, it is preferable that the hydraulic pressure or water pressure supplied from the contraction pressure pipe (310) or the inflation pressure pipe (410) always remains in the separation space (530). For example, it is preferable that the contraction pressure supply unit (300) and the inflation pressure supply unit (400) controls a flow rate so that hydraulic pressure or water pressure always remains in the separation space (530) when hydraulic pressure or water pressure flows in through the contraction pressure pipe (310) and is then discharged to the inflation pressure pipe (410).
Meanwhile, a predetermined amount of hydraulic pressure or water pressure flows into the separation space (530), thereby filling the separation space (530). Further, when the hydraulic pressure or water pressure flowing in reaches a predetermined amount or more, the hydraulic pressure or water pressure pressurizes the first rubber (520) and simultaneously sequentially pressurizes the second rubber (540) and the third rubber (560), and the third rubber (560) protrudes convexly further than the outer surface of the crack expansion unit (500), thereby supporting and pressurizing the rock (B).
On the contrary, when a predetermined amount of hydraulic pressure or water pressure is discharged through the second spray holes (511) from the separation space (530), the first rubber (520), the second rubber (540), and the third rubber (560) are sequentially released from an expanded state, and at the same time, are separated from the rock (B) and contract to be level with the outer surface of the crack expansion unit (500), thereby not supporting the rock (B).
Meanwhile, the first rubber (520), the second rubber (540), and the third rubber (560) may be made of elastic materials such as rubber, Viton, and urethane, and particularly, it is preferable that the first rubber (520) is made of a breed material to secure durability and fatigue resistance against hydraulic pressure or water pressure flowing in.
That is, the crack expansion unit (500) can split the rock (B) together with the water pressure supply control unit (200) described above. The water pressure supply control unit (200) cracks the rock (B) by applying water pressure at a predetermined level to the rock (B), and the crack expansion unit (500) inflates the rock by pressurizing the cracked rock (B), whereby it is possible to easily split the rock (B).
Therefore, according to the hybrid-type rock splitting packer using water pressure and rubber inflation pressure, there is an effect of efficiently splitting a rock by generating pre-cracks and expanding existing cracks in the rock using water pressure through the water pressure supply control unit and then expanding the generated cracks using rubber inflation pressure through the crack expansion unit.
Further, there is an effect of improving the contact area with a rock and the sealing ability by firmly sealing the inner side of the rock by inflating the holder through forward movement of the wedge-type cylinder rod and by also inflating rubbers by hydraulic pressure or water pressure.
The embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention. Therefore, it should be understood that there may be various equivalents and modifications which can be substituted for them at the time of filing the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0140374 | Oct 2021 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2021/014932 | 10/22/2021 | WO |
