The present disclosure belongs to the field of fire fighting technology, and particularly relating to a portable fire extinguisher.
At present, existing portable fire extinguishers are generally divided into stored-pressure dry powder fire extinguishers and portable aerosol fire extinguishers, wherein the stored-pressure dry powder fire extinguisher mainly have the following disadvantages: firstly, the stored-pressure dry powder fire extinguisher causes serious pollution to the environment and serious damage to articles; secondly, the stored-pressure dry powder fire extinguisher, which needs to store high pressure gases, is large in volume and heavy in weight; thirdly, the stored-pressure dry powder fire extinguisher, which is a high pressure container, has potential safety hazards and is more dangerous in a high temperature environment of a fire; fourthly, the stored-pressure dry powder fire extinguisher, which needs to go through regular inspection and verification, is high in routine maintenance costs etc. By contrast, the portable aerosol fire extinguisher has obvious advantages and mainly includes: a cartridge, a cartridge cover arranged on the cartridge, and a pyrotechnic composition, an ignition head, a coolant and a ceramic chip etc. arranged in the cartridge in turn and coated by a heat insulation material. Normally, after the pyrotechnic composition is ignited by the ignition head, a great deal of aerosol smog will be generated by the grain through rapid stratified combustion, and after being cooled by a coolant layer, these high temperature aerosols will be ejected from the cartridge cover of the cartridge to act on a fire source directly, thus extinguishing the fire. However, there are also some disadvantages. A coating defect, a pyrotechnic composition crack or a serious blockage of a gas channel may lead to a sudden rise of the pressure in the cartridge to deflagrate the grain. As a result, a high pressure gas will thrust the cartridge cover forwards and will be vented rapidly to throw the cartridge cover and other things in the cartridge forwards at an extremely high speed, thus causing a very large recoil force. The powerful recoil force drives the cartridge to move backwards rapidly, which is easy to cause an injury to an operator. At the same time, after explosion venting, the cartridge cover etc. of the fire extinguisher will also break away from the cartridge and fly outwards for a relatively long distance, which may cause other accidents. In addition, the cartridge of the fire extinguisher is easy to be loosened in an outer housing and is fixed by filling silicone in the cartridge body currently. However, the method generally needs to wait for silicone solidification by standing for seven to eight hours after silicone injection, thus a relatively large production site is required and the production efficiency is relatively low. Therefore, the problem of fixation of the cartridge of the fire extinguisher is a subject to be solved.
To solve disadvantages existing in a portable fire extinguisher in the prior art, the present disclosure provides a simple and convenient portable fire extinguisher capable of greatly reducing a production site and effectively preventing explosion and releasing pressure, and reducing a recoil force.
The technical solution adopted by the present disclosure to solve the technical problem above is:
A portable fire extinguisher includes a housing and a cartridge arranged within the housing; the top of the cartridge is provided with a cartridge cover, wherein a bottom of the cartridge is fixedly connected to the housing via a fastening device. This on the one hand facilitates shifting, and on the other hand allows the cartridge to be fixed appropriately in the housing, thus not easily rotated or loosened, also, the need of a production site for waiting for silicone solidification by standing for seven to eight hours is avoided when silicone injection for fixing is used, thus improving production efficiency.
The fastening device of the present disclosure mainly includes a screw provided at the bottom of the cartridge, a nut matched with the screw and a rotation-stopping body provided at the bottom of the housing and capable of preventing the screw from rotating.
The fastening device of the present disclosure may be also a screw running through the bottom of the housing to fixedly connect the housing with the bottom of the cartridge.
A top end of the cartridge of the present disclosure is provided with an explosion venting device; the explosion venting device includes a frictional layer, a connection rod, a connection rod guiding unit and a connection rod limiting device, wherein the connection rod is connected with the cartridge cover; the frictional layer is provided between the connection rod and an outer wall of the cartridge; when the connection rod is guided by the connection rod guiding unit to displace along a direction of a hot air stream ejected by the cartridge, the frictional layer provides a frictional resistance and a buffering force for the connection rod; the connection rod guiding unit is a device capable of providing a guiding function for the connection rod when the same is moving; the connection rod limiting device is a device capable of limiting the connection rod when an extremity of the connection rod reaches an spout of the cartridge. By consuming, in a shifting and limiting process of the explosion-venting device, kinetic energy generated by deflagration, a recoil force or a forward impact force generated after deflagration of an explosive can be consumed or reduced to vent explosion safely and effectively and avoid injuries or damages caused after deflagration of the cartridge.
The connection rod guiding unit is a guiding ring fixedly connected with the connection rod, or is a guiding groove provided on the outer wall of the cartridge and capable of enabling the connection rod to move axially along the guiding groove; the connection rod limiting device includes a flanging fixedly connected with a jet end of the cartridge and a clamping claw for fixing the connection rod; an elastic body is arranged between the flanging and the connection rod guiding unit, or is arranged on a side surface of the flanging.
The housing of the present disclosure includes a top cover; the top cover includes a top cover body and a clamping wall fixedly connected thereto; the clamping wall is arranged at an inner side of the top cover body and an extremity of the clamping wall is provided with a clamping hook, and a cavity is reserved between the clamping hook and the top cover body; a fixture block is arranged in the cavity between the clamping wall and the top cover body; the cartridge and the fixture block are respectively clamped at two sides of the clamping wall to effectively prevent deformation thereof and prevent the cartridge from being loosened by the deformation of the clamping wall of the top cover.
The bottom of the housing of the present disclosure is provided with a base with a handle and an extension and retraction control device provided thereon; extension and retraction of the handle are implemented through the extension and retraction control device, thus further saving storage space to facilitate operation and facilitating transportation and storage.
The extension and retraction control device mainly includes a locating groove arranged on the base and capable of enabling the handle to slide along the locating groove, and a limiting device capable of limiting the sliding of the handle. Limited by the locating groove, offsetting and locking during an extension and retraction process are prevented, and the limiting device performs limiting control for extension and retraction of the handle.
The limiting device mainly includes a limiting elastic sheet, a limiting screw and a limiting groove; the limiting elastic sheet is arranged in the locating groove; one side surface of the handle is provided with the limiting screw clamped with the base and the other side surface of the handle (10) is provided with the limiting groove for making the limiting elastic sheet locked; a bottom cover of the base is provided thereon with a chute capable of enabling the limiting screw to slide along the chute and capable of limiting the limiting screw.
The handle includes a curved bar and a holder; the curved bar is arranged in the locating groove and capable of sliding along the locating groove; the holder is arranged at an extremity of the curved bar.
A cavity may be arranged on both the curved bar and the holder; a push button and piezoelectric ceramics are arranged in the holder in turn; one end of the push button extends outside the holder and the other end is provided with a pin hole; an elastic clamping claw and a convex ring are arranged on the pin hole; the outer wall of the handle is provided with a safety pin; a side wall of one end of the safety pin is provided with a concave ring locked with the convex ring and an extremity of the safety pin extends into the pin hole to be locked and tightly clamped with the convex ring through the elastic clamping claw and the concave ring to fasten the safety pin; the other end of the safety pin is provided with a pull ring so that the pull ring can be pulled out.
The curved bar and the holder are hollow structures; a push button and a piezoelectric ceramics are arranged in the holder in turn; one end of the push button (33) extends outside the holder (32) and the other end is provided with a pin hole; a limiting ring is arranged outside the pin hole; an outer wall of the holder is provided with a safety pin; the safety pin includes a connection part and a clamping head connected to the lower end of the connection part; the clamping head includes one or more first elastic sheets and a second elastic sheet connected to extremity of the first elastic sheet and forming included angle with the first elastic sheets; the first elastic sheet and the second elastic sheet are respectively provided with degrees of freedom; an extremity of the second elastic sheet extends outside the pin hole and is limited through the limiting ring; the upper end of the connection part is provided with a pull ring.
The portable fire extinguisher of the present disclosure mainly has the following advantages:
1. the cartridge of the present disclosure is fixed in the housing through the fastening device, which on the one hand facilitates installation, and on the other hand allows the cartridge to be fixed properly in the housing, thus not easily being rotated or loosened; and the need of a production site for waiting for silicone solidification by standing for seven to eight hours is avoided when silicone injection for fixing is used, thus improving production efficiency.
2. the fire extinguisher of the present disclosure is provided with the explosion venting device on the cartridge, thus consuming or reducing a recoil force or a forward impact force generated by deflagration of an explosive to vent explosion safely and effectively and avoid injuries and damages caused after deflagration of the cartridge mainly through consuming kinetic energy generated by the deflagration in a shifting and limiting process of the explosion venting device; the aim of a forward movement is to release pressure while the aim of limited displacement and final limiting are to reduce the recoil force.
3. the connection rod of the present disclosure is connected with the cartridge cover of the cartridge, and adopts a structure of a flanging and a clamping claw, thus effectively controlling a motion of the connection rod, and the structure can effectively prevent a powerful impact force from acting on the cartridge cover of the cartridge to thrust the cartridge cover apart from the cartridge so as to prevent accidental injuries caused after the cartridge cover flies outwards;
4. the present disclosure mainly adopts filling the fixture block in the cavity between the clamping wall of the top cover and the top cover body so that the inner and outer sides of the clamping wall are fully filled; the cartridge is provided at the inner side and the fixture block is provided at the outer side, thus ensuring that the clamping wall will not deform, so that a relatively large extrusion force and axial tensioning force can be born so as to ensure that the cartridge can be clamped tightly; in addition, the present disclosure is simple in structure and convenient in installation.
5. the present disclosure is provided with a telescopic handle, which is convenient in packaging and transportation and saves storage space; more specifically, by the locating groove and the limiting elastic sheet arranged on the base and the limiting screw on the handle and so on, it can be ensured that the handle can be fixed and will not be separated from the housing after being pulled out, and problems of offsetting and locking dead can be also avoided;
6. the safety pin of the present disclosure is clamped tightly through the concave ring provided on the side wall of the safety pin and the elastic clamping claw on the pin hole, or is locked safely through a connection head provided on an extremity of the safety pin and capable of being limited by the limiting ring on the pin hole, thus the safety pin will not fall off easily so as to avoid the danger of error starting; in addition, the safety pin may be utilized repeatedly.
In the drawings: 1—fire extinguisher, 2—explosion venting device, 3—housing, 4—cartridge, 5—cartridge cover, 6—top cover, 7—base, 8—base body, 9—bottom cover, 10—handle, 11—frictional layer, 12—connection rod, 13—connection rod guiding unit, 14—connection rod limiting device, 15—guiding ring, 16—flanging, 17—clamping claw, 18—elastic body, 19—top cover body, 20—clamping wall, 21—clamping hook, 22—fixture block, 23—clamping point, 24—extension and retraction control device, 25—locating groove, 26—limiting elastic sheet, 27—limiting screw, 28—limiting groove, 29—limiting device, 30—starting device, 31—curved bar, 32—holder, 33—push button, 34—piezoelectric ceramics, 35—pin hole, 36—elastic clamping claw, 37—safety pin, 38—pull ring, 39—chute, 40—fastening device, 41—screw, 42—rotation-stopping body, 43—bump, 44—connection part, 45—clamping head, 46—first elastic sheet, 48—concave ring.
The present disclosure provides a portable fire extinguisher, and preferred embodiments of the present disclosure will be further described in combination with the accompanying drawings.
Referring to
Referring to
During installation, the cartridge 4 is clamped on the top cover 6 first, and the fixture block 22 is then stuck into the cavity between the clamping wall 20 and the top cover body 19 and the fixture block 22 is tightly clamped by convex points; an extremity of the cartridge 4 is then put into the housing 3 and the top cover 6 is secured to complete the installation.
Referring to
The explosion venting device of the present disclosure mainly includes a frictional layer 11, a connection rod 12, a connection rod guiding unit 13, a connection rod limiting device 14 and an elastic body 18, wherein the connection rod 12 is connected on the cartridge cover 5 of the cartridge 4, and may be fixedly connected with the cartridge cover 5 through welding and pivoting etc., or may be also integrated directly with the cartridge cover 5, thus the structural strength is higher; the frictional layer 11 may be one or more rubber rings or silicone layers or other materials capable of providing enough frictional resistance for axial sliding of the connection rod 12; the frictional layer 11 may be arranged between the connection rod 12 and the cartridge 4, or may be directly fixed at an inner side of the connection rod 12; when the connection rod 12 is guided by the connection rod guiding unit 13 to displace along an axial direction of the cartridge 4, the frictional layer 11 provides a frictional resistance and a buffering force for the connection rod; the connection rod guiding unit 13 is a device capable of providing a guiding function for the connection rod 12 when the connection rod 12 is moving, and may be a guiding ring 15 fixedly connected with the connection rod 12, or may be also a guiding groove provided on an outer wall of the cartridge 4 and capable of enabling the connection rod 12 to move axially along the guiding groove, or other structures having a guiding function; this guiding structure can prevent the connection rod 12 from being offset or clamped during a moving process of the cartridge 4; when the guiding ring 15 is applied to guiding, the guiding ring 15 may be fixedly connected or directly integrated with an extremity of the connection rod 12; the connection rod limiting device 14 of the present disclosure is fixedly connected with the cartridge cover 5 of the cartridge 4 and the connection rod 12; when the extremity of the connection rod 12 reaches a position as illustrated of the cartridge cover 5 of the cartridge 4, the connection rod is limited by the connection rod limiting device 14; the connection rod limiting device 14 mainly includes a flanging 16 and a clamping claw 17, wherein the flanging 16 is fixedly connected with the cartridge 4, or may be also integrated directly with the cartridge 4, and one end of the clamping claw 17 is fixed on the connection rod 12 while the other end of the clamping claw 17 is clamped with the cartridge 4 to mainly fix the connection rod 12; the connection rod 12 may be also integrated with the clamping claw 17, or the connection rod limiting device 14 of the present disclosure may be also other structures, as long as the connection rod 12 can be fixed on one hand, and the connection rod 12 can be blocked and prevented from being detached from the cartridge 4 on the other hand. The elastic body 18 may be further arranged between the flanging 16 of the present disclosure and the connection rod guiding unit 13, or may be arranged on a side surface of the flanging 16 to mainly buffer a collision force between the extremity of the connection rod 12 and the cartridge 4 or between the extremity of the connection rod 12 and the flanging 16, prolong collision time and release, by using the elastic property of the elastic body, a part of kinetic energy generated after deflagration.
The displacement of the connection rod 12 of the present disclosure is preferably controlled within a range of 50 to 60 mm, because excessive displacement will fail to reduce a recoil force; however, the kinetic energy cannot be consumed thoroughly by little displacement, and the cartridge cover 5 of the cartridge 4 is very likely to get rid of the blockage of the connection rod limiting device 14; once the cartridge cover 5 of the cartridge 4 is separated from the cartridge 4, a powerful recoil force will be generated; however, the displacement of the connection rod 12 may be adjusted appropriately according to a specific application environment, as long as an optimal explosion venting effect can be realized.
When the gain 7 of an inner cartridge is ignited and released normally, hot air is released from the spout of the cartridge cover 5 of the cartridge 4, and an oversize air stream will not be generated, thus the explosion venting device 2 will not be started; the connection rod 12, which is fixed on the cartridge 4 by the clamping claw 17, will not move to generate displacement along an axial direction of the cartridge 4; only when the cartridge cover 5 of the cartridge 4 and the connection rod 12 are pushed by a powerful hot air stream generated by unexpected explosive deflagration to move in a direction towards which the hot air stream is ejected, the clamping claw 17 of the connection rod limiting device 14 slips off under the action of a powerful impact force on one hand to consume a part of the impact kinetic energy. Pushed by the hot air stream, the connection rod 12 drives the guiding ring 15 to slide axially along the outer wall of the cartridge 4 to generate displacement, and the frictional layer 11 generates frictional resistance to the connection rod during the moving process to consume a part of the impact kinetic energy. When the extremity of the connection rod 12 reaches the spout of the cartridge 4, the flanging 16 of the connection rod limiting device 14 fixed on the cartridge 4 stops the extremity of the connection rod 12 from being separated from the cartridge 4; at the moment, the elastic body 18 arranged between the flanging 16 and the guiding ring 15 functions to consume a part of the impact kinetic energy by its elasticity, and buffers the powerful impact force between the extremity of the connection rod 12 and the flanging 16 additionally. When the final kinetic energy acts on the flanging 16 in the form of collision, the flanging 16 is deformed elastically or plastically, which will consume all remaining kinetic energy. Thus the powerful impact kinetic energy generated by deflagration of the grain 7 may be well consumed or dispersed in the whole process to avoid injuries or damages brought thereby.
Referring to
A handle 10 is further arranged on the base 7 of the present disclosure; the handle 10 may have a structure of a handle 10 in the prior art, or may be also a handle 10 with another structure, mainly aiming at facilitating carrying and operation. Referring to
The curved bar 31 and the holder 32 of the present disclosure are arranged with cavities, so it is beautiful in appearance and saves wiring space. However, grooves or U-shaped grooves and so on may be also provided therewith.
Referring to
The safety pin 37 of the present disclosure may be also of a structure as shown in
In order to improve the durability of the clamping head 45, the clamping head 45 is optimally made of an injection material, i.e. a Polyamide material (PA66), PE, PP, ABS, PC or a PC alloy etc., preferably the Polyamide 66 material (PA66). The connection part 44 and the clamping head 45 may adopt the same material, i.e. both of them adopt the injection material Polyamide 66 material (PA66), thus improving the abrasive resistance, the tensile resistance and the number of recycling times thereof.
In normal conditions of the portable fire extinguisher of the present disclosure, the safety pin 37 should be clamped in the pin hole 35, tightly; the push button 33 is fixed by the pin hole 35 and cannot move;. Therefore, the piezoelectric ceramics 34 cannot be started to start a fire extinguishing agent, and the limiting screw of the handle 10 is clamped in the chute 39 while the limiting elastic sheet is clamped in the limiting groove of the handle 10. In use, the handle 10 is pulled out first for operation; subsequently, the safety pin 37 is pulled out and the push button 33 is pressed so that the piezoelectric ceramics 34 is started by the push button 33 to ignite an explosive in the cartridge. A generated hot aerosol is cooled by a chemical coolant and a cellular ceramic body, and simultaneously, the coolant undergoes some chemical and physical changes, and the hot aerosol is ejected through the spout of the grain to extinguish a fire.
Number | Date | Country | Kind |
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201120372449.2 | Sep 2011 | CN | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CN2012/080225 | 8/16/2012 | WO | 00 | 3/27/2014 |