Pneumatic door opener and door opening method thereof

Abstract

The invention relates to a pneumatic door opener and a door opening method thereof. A mounting cylinder; the valve rod assembly is arranged in the mounting cylinder and divides the interior of the mounting cylinder into a high-pressure gas bin and an impact bin; one end of the impact piece is arranged in the impact bin of the mounting barrel, the other end of the impact piece extends out of the mounting barrel and is used for opening the door, and the driving assembly is configured to be in linkage with the valve rod assembly, so that compressed gas in the high-pressure gas bin is decompressed into the impact bin, and the impact piece is driven to open the door. High-pressure gas of a fire-fighting air expiration system is used as a power source, that is, an additional power source is not needed, and the device can work only by means of the high-pressure gas provided by the fire-fighting air expiration system, so that the complexity of the device and dependence on external conditions are greatly reduced, and the portability and applicability of the device are improved; and the energy of the high-pressure gas can be quickly converted into kinetic energy of the impact piece through the pneumatic assembly, so that quick and strong impact on the door lock or the door body is realized, and the door breaking speed is remarkably increased.

Description

Technical Field

[0001] The invention relates to the technical field of door breaking operations, in particular to a pneumatic door breaker and a door breaking method thereof. Background Art

[0002] In emergency rescue, firefighting and certain military operations, it is crucial to quickly enter a closed space. Traditional methods of breaking doors, such as using crowbars, axes or explosives, have disadvantages such as complex operation, long time consumption, insufficient safety or possible damage to the surrounding environment. Especially in scenarios where it is necessary to quickly enter a fire scene, rescue trapped people or perform emergency tasks, these traditional methods often cannot meet the needs of breaking doors quickly, efficiently and safely. Firefighting air breathing system (i.e., air respirator) is an important equipment for firefighters and other emergency personnel to perform respiratory protection in dangerous environments. The system is usually equipped with a high-pressure gas cylinder that can provide a continuous and stable gas source. However, in the prior art, the gas source of the firefighting air breathing system is mainly used to provide breathing air for emergency personnel, and its potential kinetic energy utilization value has not been fully explored. In response to the above problems, some devices that attempt to use compressed gas to break doors have appeared on the market, but these devices are often complex in structure, cumbersome to operate, and rely on external power sources, such as electricity or compressed air tanks, which to a certain extent limits their portability and scope of application. In addition, these devices also have certain shortcomings in terms of door breaking effect, door breaking speed, and safety. Therefore, the present invention aims to provide a pneumatic door breaker and a door breaking method thereof which can quickly break doors, has good door breaking effects and only requires the help of a fire air breathing system to provide kinetic energy, so as to meet the actual needs of emergency rescue and fire fighting operations. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pneumatic door breaker and a door breaking method thereof, which can quickly break doors and has good door breaking effect and only requires kinetic energy from a fire fighting air breathing system.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solution: a pneumatic door breaker, comprising: Install the barrel; A valve stem assembly is placed in the installation tube, and the valve stem assembly divides the installation tube into a high-pressure gas chamber and an impact chamber; An impact member, one end of which is placed in the impact chamber of the installation tube, and the other end of which extends outside the installation tube and is used to break the door; The driving assembly is configured to be linked with the valve stem assembly to cause the compressed gas in the high-pressure gas chamber to release pressure into the impact chamber and drive the impact member to break the door.

[0005] The technical problem to be solved by the present invention can also be achieved by the following technical solution: in the above-mentioned pneumatic door breaker, the valve stem assembly comprises: An intermediate fixing plate is placed in the middle of the mounting tube. The spaces between the two ends of the mounting tube and the intermediate fixing plate form the high-pressure gas chamber and the impact chamber in sequence. An air groove for air flow is formed in the middle of the intermediate fixing plate. A valve stem and a valve core, one end of the valve stem is placed in the high-pressure gas chamber, and the other end extends into the impact chamber through the gas groove, and the valve core is fixed on the outer peripheral surface of the middle part of the valve stem to selectively block the gas groove; A centering fixing component for supporting the valve core on the valve stem and maintaining the sealed air groove is arranged in the high-pressure gas chamber.

[0006] The technical problem to be solved by the present invention can also be achieved by the following technical solution. In the above-mentioned pneumatic door breaker, the centering and fixing assembly comprises: A plurality of support members are placed in the high-pressure gas chamber, and are provided with a centering hole for the end of the valve stem to pass through. The outer wall of the support member abuts against the inner peripheral surface of the high-pressure gas chamber of the mounting tube, so as to keep the axis of the centering hole always on the axis of the mounting tube; A support screw, one end of which is fixed on the support member and the other end of which is directly facing the side wall of the mounting cylinder; The elastic element I is sleeved on the outer peripheral surface of the valve stem, one end of which abuts against the side wall of the valve core and the other end abuts against the side wall of the support member, so that the valve core blocks the air groove.

[0007] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the above-mentioned pneumatic door breaker, the driving assembly comprises: A brake piston is placed in the impact chamber, one side of which faces the end of the valve stem and the other side is integrally mounted with the impact member; A brake chamber, which is fixed on the middle fixed plate and has a cavity inside, one end of which is a control end and the other end is an execution end; A distributor is fixed at the control end of the brake chamber, and an air passage is provided in the distributor. The air inlet end of the air passage is connected to the high-pressure air chamber, and the air outlet end of the air passage is connected to the cavity of the brake chamber and the impact chamber respectively; Valve I, which is installed on the distributor and located on the part of the air passage connected to the impact chamber, thereby controlling the on-off of the high-pressure gas entering the impact chamber from the air passage; Valve II, which is installed in the cavity of the brake chamber to control the on-off of high-pressure gas entering the cavity from the air passage; a valve III, which is mounted outside the impact chamber of the mounting barrel and is configured to deflate the impact chamber; The unlocking mechanism is arranged between the mounting cylinder and the striking member.

[0008] The technical problem to be solved by the present invention can also be achieved by the following technical solution: in the above-mentioned pneumatic door breaker, the impact member comprises: A striking rod, one end of which is fixed on the side of the brake piston and the other end of which extends out of the mounting tube, and a striking head for striking the door is fixed on the outer peripheral surface of the striking rod extending out of the mounting tube; The elastic element II is sleeved on the outer peripheral surface of the impact rod, one end of which abuts against the end surface of the brake piston and the other end abuts against the inner wall of the impact chamber of the mounting cylinder.

[0009] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the pneumatic door breaker described above further includes a front fixing plate and a rear fixing plate; The front fixing plate is fixed to the end of the mounting tube close to the high-pressure gas chamber, and a high-pressure pipe interface connected to the interior of the high-pressure gas chamber is installed on the front fixing plate; The rear fixing plate is fixed on the end of the mounting tube close to the impact bin.

[0010] The technical problem to be solved by the present invention can also be achieved by the following technical solutions. In the above-mentioned pneumatic door breaker, the unlocking mechanism comprises: An unlocking rod, one end of which is placed in the cavity at the execution end of the brake chamber, and the other end of which extends to the rear fixing plate and is provided with a slope; A limit slide is slidably mounted on the rear fixed plate and is perpendicular to the axis of the strike rod. One end of the limit slide abuts against the middle of the slope of the unlocking rod and the other end is mounted on the rear fixed plate through a reset mechanism. A limit hole is provided in the middle of the limit slide for the strike rod to pass through. A limiting groove is provided on the outer peripheral surface of the portion of the striking rod extending out of the mounting tube, wherein one end edge of the limiting groove facing the brake piston is smoothly connected to the outer peripheral surface of the striking rod, and the other end edge forms an abutting surface that can abut against the limiting hole on the limiting slide, so that when the striking rod performs the striking action, the limiting groove will not abut against the limiting slide, and when the striking rod returns, the abutting surface of the limiting groove abuts against the limiting slide; The reset mechanism can make the limiting hole of the limiting slide plate stuck on the limiting groove of the impact rod when the elastic element II is in a compressed state, thereby preventing the elastic element II from releasing the elastic potential energy that causes the impact rod to impact the valve stem.

[0011] The technical problem to be solved by the present invention can also be achieved by the following technical solutions: in the above-mentioned pneumatic door breaker, the reset mechanism comprises: A reset groove is provided on the bottom wall of the rear fixing plate; A reset pin, one end of which is fixed on the limit slide and the other end of which extends into the reset groove; The elastic element III has one end fixed on the inner wall of the reset groove and the other end fixed on the reset pin. When the limiting hole is stuck in the limiting groove, the elastic element III is in a relaxed state.

[0012] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the pneumatic door breaker described above further comprises a supporting connecting pipe, which is symmetrically fixedly mounted on both sides of the front fixing plate, the middle fixing plate and the rear fixing plate, and the switches of the aforementioned valves I, II and III are mounted on the outer wall of one of the supporting connecting pipes; Vertical handles are fixedly mounted on the bottom walls on both sides of the front fixing plate and the rear fixing plate respectively; A pressure gauge is installed on the front fixing plate, and a test contact of the pressure gauge is placed in the high-pressure gas chamber of the installation cylinder. A power supply chamber is installed on the bottom surface of the middle fixing plate and the rear fixing plate.

[0013] The technical problem to be solved by the present invention can also be achieved by the following technical solution: a method for breaking a door with a pneumatic door breaker, which adopts the pneumatic door breaker of the above technical solution, and the steps are as follows: (1) Before breaking the door, we use two staff members to hold the four vertical handles on the bottom wall of the front and rear fixed plates, move the pneumatic door breaker to the place where the door needs to be broken, and temporarily place the pneumatic door breaker on the ground. At this time, the four vertical handles stand vertically on the ground. We then connect the air outlet pipe of the fire air breathing system to the high-pressure pipe interface of the installation cylinder, thereby automatically inflating the high-pressure gas storage area in the installation cylinder. When the air pressure reaches a certain value, the two staff members hold the vertical handles and lift the pneumatic door breaker to the door lock position. At this time, it is in a state of waiting to break the door; (2) When breaking the door, we press the switch of valve I on the supporting connecting pipe. At this time, part of the high-pressure gas in the high-pressure gas chamber will enter the impact chamber through valve I, causing the brake piston to move away from the high-pressure gas chamber. During this period, the elastic element II is compressed until the limit slide can be on the limit groove of the impact rod. At this time, valve I is closed and the high-pressure gas in the impact chamber is depressurized through valve III. After the pressure relief is completed, valve III is closed. At this time, it is in the ready-to-fire state. After the impact rod is aligned with the door lock, the switch of valve II is pressed to allow the high-pressure gas to enter the cavity of the brake chamber, causing The unlocking rod moves in the direction away from the high-pressure gas chamber. During the movement, the slope on the end of the unlocking rod abuts against the upper end surface of the limit slide and pushes the limit slide downward, so that the limit slide is no longer stuck in the limit groove of the impact rod, so that the elastic element II in the compressed state releases its elastic potential energy, and the impact rod moves toward the direction of the high-pressure gas chamber and hits the valve stem, so that the high-pressure gas in the high-pressure gas chamber is instantly sprayed into the impact chamber and instantly pushes the impact rod, so that the impact head on the impact rod hits the door lock once, and a single door breaking action is completed at this time; (3) When repeatedly breaking the door, after completing a single door-breaking action, if the door lock is not completely destroyed, the fire air breathing system will inflate the high-pressure gas chamber again. When the impact rod is performing the first impact action, the limit groove is smoothly connected to the outer peripheral surface of the impact rod due to the end facing the brake piston. Therefore, at the moment of impact, the limit hole on the limit slide will not abut against the limit groove. When the impact rod returns to its position, the abutting surface of the limit groove will abut against the limit slide. At this time, the fire state is entered again. Pressing the valve II switch again can perform the second door-breaking action. This can be repeated many times until the door-breaking operation is completed.

[0014] Compared with the prior art, the beneficial technical effects of the present invention include: (1) The present invention uses the high-pressure gas of the fire fighting air breathing system as a power source, that is, no additional power source is required, and only the high-pressure gas provided by the fire fighting air breathing system can work. This greatly reduces the complexity of the equipment and its dependence on external conditions, improves the portability and applicability of the equipment, and can quickly convert the energy of the high-pressure gas into the kinetic energy of the impact part through the pneumatic component, thereby achieving a rapid and powerful impact on the door lock or door body, thereby significantly improving the door breaking speed; (2) After a single door-breaking operation, the pneumatic door breaker can inflate the high-pressure gas chamber again through the fire air breathing system, so that the impact piece returns to its original position and prepares for the next door-breaking operation. This reusable feature greatly improves the utilization rate of the equipment and the success rate of door-breaking. (3) The impact piece is equipped with an elastic element II that can reset the impact rod. It can reset itself after each door break. It is easy to use and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the pneumatic door breaker of the present invention; Figure 2 It is a schematic diagram of the structure of the pneumatic door breaker of the present invention when viewed from above; Figure 3 It is a schematic diagram of the full cross-section structure of the door breaker of the present invention; Figure 4 It is a schematic diagram of the top view of the unlocking mechanism of the present invention; Figure 5 It is a schematic diagram of the full cross-section structure of the unlocking mechanism of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the unlocking mechanism of the present invention; Figure 7 It is a schematic diagram of the top view of the driving assembly of the present invention; Figure 8 It is a schematic diagram of the full cross-section structure of the drive assembly of the present invention; Fig. 9 for Figure 5 Schematic diagram of the local enlarged structure.

[0016] : Illustrations: 1. Mounting cylinder; 2. High-pressure gas chamber; 3. Impact chamber; 4. Intermediate fixing plate; 5. Air groove; 6. Valve stem; 7. Valve core; 8. Support member; 9. Centering hole; 10. Support screw; 11. Brake piston; 12. Brake chamber; 13. Distributor; 14. Air duct; 15. Valve I; 16. Valve II; 17. Valve III; 18. Impact rod; 19. Impact head; 20. Front fixing plate; 21. Rear fixing plate; 22. High-pressure pipe interface; 23. Unlocking rod; 24. Slope; 25. Limiting hole; 26. Limiting groove; 27. Abutment surface; 28. Reset groove; 29. ​​Reset pin; 30. Limiting slide; 31. Vertical handle; 32. Pressure gauge; 33. Power supply chamber. DETAILED DESCRIPTION

[0017] The specific technical solutions of the present invention are further described below with reference to the accompanying drawings, so as to facilitate further understanding of the present invention by those skilled in the art, and do not constitute a limitation on the rights thereof.

[0018] Example 1, reference Figure 1-3 , a pneumatic door breaker, comprising; The mounting tube 1 is formed into a substantially cylindrical structure; A valve stem assembly is placed in the installation tube 1, and the valve stem assembly divides the installation tube 1 into a high-pressure gas chamber 2 and an impact chamber 3; An impact member, one end of which is placed in the impact chamber 3 of the installation tube 1, and the other end of which extends outside the installation tube 1 and is used to break the door; The driving assembly is configured to be linked with the valve stem assembly, so that the compressed gas in the high-pressure gas chamber 2 is released into the impact chamber 3, and the impact member is driven to break the door.

[0019] Embodiment 2, a pneumatic door breaker as described in embodiment 1, wherein the valve stem assembly comprises: The intermediate fixing plate 4 is formed into a roughly plate-shaped structure and is placed in the middle of the mounting tube 1. The spaces between the two ends of the mounting tube 1 and the intermediate fixing plate 4 sequentially form the high-pressure gas chamber 2 and the impact chamber 3. An air groove 5 for air flow is formed in the middle of the intermediate fixing plate 4. The air groove 5 can actually be a cylindrical through groove. A valve stem 6 and a valve core 7, one end of the valve stem 6 is placed in the high-pressure gas chamber 2, and the other end extends into the impact chamber 3 through the gas groove 5. The valve stem 6 is formed into a roughly cylindrical rod-shaped body, and the valve core 7 is fixed on the outer peripheral surface of the middle part of the valve stem 6, so as to selectively block the gas groove 5; A centering fixing component is arranged in the high-pressure gas chamber 2 to support the valve core 7 on the valve stem 6 and keep the gas groove 5 sealed.

[0020] In Example 2, the valve core 7 on the valve stem 6 is used to seal the air groove 5. When the high-pressure gas chamber 2 is filled with gas, the air pressure formed can also press the valve core 7 on the air groove 5, so that a relatively closed air chamber is formed in the high-pressure gas chamber 2. When the valve core 7 moves along the axial direction of the valve stem 6 toward the centering fixing component, the gas in the high-pressure gas chamber 2 can be released into the impact chamber 3.

[0021] Embodiment 3, a pneumatic door breaker as described in Embodiment 2, wherein the centering and fixing assembly comprises: A plurality of support members 8 are placed in the high-pressure gas chamber 2. The support members 8 are formed into a roughly polygonal plate-shaped structure. The specific structure can be selected according to the use requirements. There is a centering hole 9 for the end of the valve stem 6 to pass through. The outer wall of the support member 8 abuts against the inner circumference of the high-pressure gas chamber 2 of the mounting tube 1, so as to keep the axis of the centering hole 9 always on the axis of the mounting tube 1; A support screw 10, one end of which is bolted to the support member 8 and the other end of which is facing the side wall of the mounting tube 1; The elastic element I (not shown in the figure) is sleeved on the outer peripheral surface of the valve stem 6, one end of which abuts against the side wall of the valve core 7 and the other end abuts against the side wall of the support member 8. The elastic potential energy of the elastic element I (not shown in the figure) causes the valve core 7 to be pressed against the notch of the air blocking groove 5, thereby sealing the notch.

[0022] In the third embodiment, no matter what the shape of the support member 8 is, it is sufficient that its outer peripheral surface can abut against the inner peripheral surface of the mounting tube 1 and the valve stem 6 is supported by the centering hole 9 .

[0023] Example 4, reference Figure 7-8 , the pneumatic door breaker described in embodiment 2, the driving assembly comprises: The brake piston 11 is placed in the impact chamber 3, with one side thereof facing the end of the valve stem 6 and the other side thereof being installed as a whole with the impact member. An elastic element IV (not shown in the figure) for resetting the brake piston 11 can be installed on the outer peripheral surface of the middle part of the brake piston 11 and the inner wall of the end of the impact chamber 3 away from the high-pressure gas chamber 2. The design purpose is that after each push of the brake piston 11, the elastic potential energy can be released by the elastic element IV to reset the brake piston 11; The brake chamber 12 is formed into a hollow columnar structure, which is fixed on the middle fixed plate 4 and has a cavity inside, one end of which is a control end and the other end is an execution end; The distributor 13 is formed into a roughly square block structure, which is fixed at the control end of the brake chamber 12. An air passage 14 is opened in the distributor 13. The air inlet end of the air passage 14 is connected to the high-pressure air chamber 2, and the air outlet end of the air passage 14 is respectively connected to the cavity of the brake chamber 12 and the impact chamber 3; A valve Ⅰ 15 is installed on the distributor 13 and is located on the portion of the gas passage 14 connected to the impact chamber 3, so as to control the on-off of the high-pressure gas entering the impact chamber 3 from the gas passage 14; Valve II 16, which is installed in the cavity of the brake chamber 12, so as to control the on-off of the high-pressure gas entering the cavity from the air passage 14; a valve III 17 , which is mounted outside the impact chamber 3 of the mounting cylinder 1 and is configured to deflate the impact chamber 3 ; The unlocking mechanism is arranged between the mounting cylinder 1 and the striking member.

[0024] In Example 4, valve I15 is used to control the flow of high-pressure gas from the air duct 14 in the high-pressure gas chamber 2 into the impact chamber 3, valve II16 is used to control the flow of high-pressure gas from the air duct 14 in the high-pressure gas chamber 2 into the brake chamber 12, and valve III17 is used to relieve the pressure of the gas in the impact chamber 3.

[0025] Embodiment 5, a pneumatic door breaker as described in embodiment 4, wherein the impact member comprises: The striking rod 18 is formed into a roughly cylindrical structure, one end of which is fixed to the side surface of the brake piston 11, and the other end of which extends out of the mounting tube 1. A striking head 19 for striking the door is fixedly provided on the outer peripheral surface of the striking rod 18 extending out of the mounting tube 1, and the striking head 19 is formed into a roughly truncated cone structure; The elastic element II (not shown) is sleeved on the outer peripheral surface of the impact rod 18 , with one end abutting against the end surface of the brake piston 11 and the other end abutting against the inner wall of the impact chamber 3 of the mounting cylinder 1 .

[0026] It should be noted that the elastic element I, the elastic element II and the elastic element III described below can all be elastic elements such as springs.

[0027] Embodiment 6, a pneumatic door breaker as described in Embodiment 5, further comprising a front fixing plate 20 and a rear fixing plate 21, wherein the front fixing plate 20 and the rear fixing plate 21 are both formed into a substantially plate-shaped structure; The front fixing plate 20 is fixed to the end of the mounting tube 1 close to the high-pressure gas chamber 2. A high-pressure pipe interface 22 connected to the inside of the high-pressure gas chamber 2 is installed on the front fixing plate 20. The high-pressure pipe interface 22 is used to connect the air supply pipe of the air breathing system of the firefighters. The rear fixing plate 21 is fixed to the end of the mounting tube 1 close to the impact chamber 3 .

[0028] Example 7, reference Figure 4-6 5. In the pneumatic door breaker described in Example 5, the unlocking mechanism comprises: The unlocking rod 23 is formed into a roughly cylindrical rod structure, one end of which is placed in the cavity at the execution end of the brake chamber 12, and the other end extends to the rear fixing plate 21 and is provided with a slope 24. The angle between the slope 24 and the horizontal plane can be selected by the user, and the slope 24 is directly opposite to the upper end of the limiting slide 30; The limiting slide 30 is vertically arranged and formed into a roughly square plate-shaped structure. It is slidably mounted on the rear fixing plate 21 and is perpendicular to the axis of the striking rod 18. One end of the limiting slide 30 abuts against the middle of the slope 24 of the unlocking rod 23, and the other end is mounted on the rear fixing plate 21 through a reset mechanism. A limiting hole 25 for the striking rod 18 to pass through is opened in the middle of the limiting slide 30, and the limiting hole 25 is formed into a roughly circular hole-shaped structure. The limiting groove 26 is formed as a roughly annular groove, which is opened on the outer peripheral surface of the portion of the striking rod 18 extending out of the mounting tube 1, and one end edge of the limiting groove 26 facing the brake piston 11 is smoothly connected to the outer peripheral surface of the striking rod 18, and the other end edge forms an abutment surface 27 that can abut against the limiting hole 25 on the limiting slide 30, so that the limiting groove 26 will not abut against the limiting slide 30 when the striking rod 18 performs the striking action, and the abutment surface 27 of the limiting groove 26 abuts against the limiting slide 30 when the striking rod 18 returns to its original position; The reset mechanism can make the limiting hole 25 of the limiting slide 30 stuck on the limiting groove 26 of the impact rod 18 when the elastic element II is in a compressed state, thereby preventing the elastic element II from releasing the elastic potential energy that causes the impact rod 18 to impact the valve stem 6.

[0029] Embodiment 8, a pneumatic door breaker as described in Embodiment 7, wherein the reset mechanism comprises: The reset groove 28 is formed into a substantially square groove structure and is provided on the bottom wall of the rear fixing plate 21; A reset pin 29, one end of which is fixed on the limit slide 30 and the other end of which extends into the reset groove 28; One end of the elastic element III is fixed on the inner wall of the reset groove 28 and the other end is fixed on the reset pin 29. When the limiting hole 25 is stuck in the limiting groove 26, the elastic element III is in an extended state.

[0030] In Example 8, the reset mechanism is designed to push the reset pin 29 and the limiting slide 30 so that the limiting hole 25 on the limiting slide 30 always abuts against the outer peripheral surface of the impact rod 18.

[0031] Embodiment 9, a pneumatic door breaker as described in embodiment 7, further comprising a supporting connecting pipe 31, which is formed into a substantially rod-shaped structure and is symmetrically fixedly mounted on both sides of the front fixing plate 20, the middle fixing plate 4 and the rear fixing plate 21, and the switches of the aforementioned valves I 15, II 16 and III 17 are mounted on the outer wall of one of the supporting connecting pipes 31; Vertical handles 31 are fixedly mounted on the bottom walls of both sides of the front fixing plate 20 and the rear fixing plate 21, respectively. The vertical handles 31 are formed into a substantially cylindrical structure. A pressure gauge 32 is installed on the front fixing plate 20 , and a test contact of the pressure gauge 32 is placed in the high-pressure gas chamber 2 of the mounting tube 1 . A power supply chamber 33 is installed on the bottom surfaces of the middle fixing plate 4 and the rear fixing plate 21 .

[0032] Embodiment 10, a method for breaking a door using a pneumatic door breaker, which uses the pneumatic door breaker in Embodiments 1-9, and the steps are as follows: (1) Before breaking the door, we use two staff members to hold the four vertical handles 31 on the bottom wall of the front fixing plate 20 and the rear fixing plate 21, move the pneumatic door breaker to the place where the door needs to be broken, and temporarily place the pneumatic door breaker on the ground. At this time, the four vertical handles 31 stand vertically on the ground. We then connect the air outlet pipe of the fire air breathing system to the high-pressure pipe interface 22 of the installation tube 1, thereby automatically inflating the high-pressure gas chamber 2 area in the installation tube 1. When the air is inflated to a certain air pressure value, the two staff members hold the vertical handles 31 and lift the pneumatic door breaker to the door lock position. At this time, it is in a state of waiting to break the door; (2) When breaking the door, we press the switch of valve I15 on the supporting connecting pipe 31. At this time, part of the high-pressure gas in the high-pressure gas chamber 2 will enter the impact chamber 3 through valve I15, causing the brake piston 11 to move away from the high-pressure gas chamber 2. During this period, the elastic element II is compressed until the limiting slide 30 can be on the limiting groove 26 of the impact rod 18. At this time, valve I15 is closed, and the high-pressure gas in the impact chamber 3 is depressurized through valve III17. After the depressurization is completed, valve III17 is closed. At this time, it is in the ready-to-fire state. After the impact rod 18 is aligned with the door lock, the switch of valve II16 is pressed, so that the high-pressure gas enters the cavity of the brake chamber 12, causing The unlocking rod 23 moves in a direction away from the high-pressure gas chamber 2. During the movement, the slope 24 on the end of the unlocking rod 23 abuts against the upper end surface of the limiting slide 30 and pushes the limiting slide 30 downward, so that the limiting slide 30 is no longer stuck in the limiting groove 26 of the striking rod 18, so that the elastic element II in the compressed state releases its elastic potential energy, and the striking rod 18 moves toward the direction of the high-pressure gas chamber 2 and strikes the valve stem 6, so that the high-pressure gas in the high-pressure gas chamber 2 is instantly sprayed into the striking chamber 3, and instantly pushes the striking rod 18, so that the striking head 19 on the striking rod 18 strikes the door lock once, and a single door breaking action is completed at this time; (3) When repeatedly breaking the door, after completing a single door-breaking action, if the door lock is not completely destroyed, the fire air breathing system will inflate the high-pressure gas chamber 2 again. When the impact rod 18 is performing the first impact action, the limit groove 26 is smoothly connected to the outer peripheral surface of the impact rod 18 due to the end facing the brake piston 11. Therefore, at the moment of impact of the impact rod 18, the limit hole 25 on the limit slide 30 will not abut against the limit groove 26. When the impact rod 18 returns to its original position, the abutting surface 27 of the limit groove 26 will abut against the limit slide 30. At this time, the firing state is entered again. By pressing the valve II 16 switch again, the second door-breaking action can be performed. This can be repeated many times until the door-breaking operation is completed.

Claims

1. A pneumatic door breaker, characterized in that: These include; Install the barrel; A valve stem assembly is placed in the installation tube, and the valve stem assembly divides the installation tube into a high-pressure gas chamber and an impact chamber; An impact member, one end of which is placed in the impact chamber of the installation tube, and the other end of which extends outside the installation tube and is used to break the door; The driving assembly is configured to be linked with the valve stem assembly to cause the compressed gas in the high-pressure gas chamber to release pressure into the impact chamber and drive the impact member to break the door.

2. A pneumatic door breaker according to claim 1, characterized in that: The valve stem assembly comprises: An intermediate fixing plate is placed in the middle of the mounting tube. The spaces between the two ends of the mounting tube and the intermediate fixing plate form the high-pressure gas chamber and the impact chamber in sequence. An air groove for air flow is formed in the middle of the intermediate fixing plate. A valve stem and a valve core, one end of the valve stem is placed in the high-pressure gas chamber, and the other end extends into the impact chamber through the gas groove, and the valve core is fixed on the outer peripheral surface of the middle part of the valve stem to selectively block the gas groove; A centering fixing component for supporting the valve core on the valve stem and maintaining the sealed air groove is arranged in the high-pressure gas chamber.

3. A pneumatic door breaker according to claim 2, characterized in that: The centering and fixing assembly comprises: A plurality of support members are placed in the high-pressure gas chamber, and are provided with a centering hole for the end of the valve stem to pass through. The outer wall of the support member abuts against the inner peripheral surface of the high-pressure gas chamber of the mounting tube, so as to keep the axis of the centering hole always on the axis of the mounting tube; A support screw, one end of which is fixed on the support member and the other end of which is directly facing the side wall of the mounting cylinder; The elastic element I is sleeved on the outer peripheral surface of the valve stem, one end of which abuts against the side wall of the valve core and the other end abuts against the side wall of the support member, so that the valve core blocks the air groove.

4. A pneumatic door breaker according to claim 2, characterized in that: The driving assembly comprises: A brake piston is placed in the impact chamber, one side of which faces the end of the valve stem and the other side is integrally mounted with the impact member; A brake chamber, which is fixed on the middle fixed plate and has a cavity inside, one end of which is a control end and the other end is an execution end; A distributor is fixed at the control end of the brake chamber, and an air passage is provided in the distributor. The air inlet end of the air passage is connected to the high-pressure air chamber, and the air outlet end of the air passage is connected to the cavity of the brake chamber and the impact chamber respectively; Valve I, which is installed on the distributor and located on the part of the air passage connected to the impact chamber, thereby controlling the on-off of the high-pressure gas entering the impact chamber from the air passage; Valve II, which is installed in the cavity of the brake chamber to control the on-off of high-pressure gas entering the cavity from the air passage; a valve III, which is mounted outside the impact chamber of the mounting barrel and is configured to deflate the impact chamber; The unlocking mechanism is arranged between the mounting cylinder and the striking member.

5. A pneumatic door breaker according to claim 4, characterized in that: The impact member comprises: A striking rod, one end of which is fixed on the side of the brake piston and the other end of which extends out of the mounting tube, and a striking head for striking the door is fixed on the outer peripheral surface of the striking rod extending out of the mounting tube; The elastic element II is sleeved on the outer peripheral surface of the impact rod, one end of which abuts against the end surface of the brake piston and the other end abuts against the inner wall of the impact chamber of the mounting cylinder.

6. A pneumatic door breaker according to claim 5, characterized in that: Also included are a front fixing plate and a rear fixing plate; The front fixing plate is fixed to the end of the mounting tube close to the high-pressure gas chamber, and a high-pressure pipe interface connected to the interior of the high-pressure gas chamber is installed on the front fixing plate; The rear fixing plate is fixed on the end of the mounting tube close to the impact bin.

7. The pneumatic door breaker according to claim 5, characterized in that: The unlocking mechanism comprises: An unlocking rod, one end of which is placed in the cavity at the execution end of the brake chamber, and the other end of which extends to the rear fixing plate and is provided with a slope; A limit slide is slidably mounted on the rear fixed plate and is perpendicular to the axis of the strike rod. One end of the limit slide abuts against the middle of the slope of the unlocking rod and the other end is mounted on the rear fixed plate through a reset mechanism. A limit hole is provided in the middle of the limit slide for the strike rod to pass through. A limiting groove is provided on the outer peripheral surface of the portion of the striking rod extending out of the mounting tube, wherein one end edge of the limiting groove facing the brake piston is smoothly connected to the outer peripheral surface of the striking rod, and the other end edge forms an abutting surface that can abut against the limiting hole on the limiting slide, so that when the striking rod performs the striking action, the limiting groove will not abut against the limiting slide, and when the striking rod returns, the abutting surface of the limiting groove abuts against the limiting slide; The reset mechanism can make the limiting hole of the limiting slide plate stuck on the limiting groove of the impact rod when the elastic element II is in a compressed state, thereby preventing the elastic element II from releasing the elastic potential energy that causes the impact rod to impact the valve stem.

8. A pneumatic door breaker according to claim 7, characterized in that: The reset mechanism comprises: A reset groove is provided on the bottom wall of the rear fixing plate; A reset pin, one end of which is fixed on the limit slide and the other end of which extends into the reset groove; The elastic element III has one end fixed on the inner wall of the reset groove and the other end fixed on the reset pin. When the limiting hole is stuck in the limiting groove, the elastic element III is in a relaxed state.

9. The pneumatic door breaker according to claim 7, characterized in that: It also includes a supporting connecting pipe, which is symmetrically fixed on both sides of the front fixing plate, the middle fixing plate and the rear fixing plate, and the switches of the valves I, II and III are installed on the outer wall of one of the supporting connecting pipes; Vertical handles are fixedly mounted on the bottom walls on both sides of the front fixing plate and the rear fixing plate respectively; A pressure gauge is installed on the front fixing plate, and a test contact of the pressure gauge is placed in the high-pressure gas chamber of the installation cylinder. A power supply chamber is installed on the bottom surface of the middle fixing plate and the rear fixing plate.

10. A method for breaking a door using a pneumatic door breaker, using the pneumatic door breaker according to any one of claims 1 to 9, characterized in that: The steps are as follows: (1) Before breaking the door, we use two staff members to hold the four vertical handles on the bottom wall of the front and rear fixed plates, move the pneumatic door breaker to the place where the door needs to be broken, and temporarily place the pneumatic door breaker on the ground. At this time, the four vertical handles stand vertically on the ground. We then connect the air outlet pipe of the fire air breathing system to the high-pressure pipe interface of the installation cylinder, thereby automatically inflating the high-pressure gas storage area in the installation cylinder. When the air pressure reaches a certain value, the two staff members hold the vertical handles and lift the pneumatic door breaker to the door lock position. At this time, it is in a state of waiting to break the door; (2) When breaking the door, we press the switch of valve I on the supporting connecting pipe. At this time, part of the high-pressure gas in the high-pressure gas chamber will enter the impact chamber through valve I, causing the brake piston to move away from the high-pressure gas chamber. During this period, the elastic element II is compressed until the limit slide can be on the limit groove of the impact rod. At this time, valve I is closed and the high-pressure gas in the impact chamber is depressurized through valve III. After the pressure relief is completed, valve III is closed. At this time, it is in the ready-to-fire state. After the impact rod is aligned with the door lock, the switch of valve II is pressed to allow the high-pressure gas to enter the cavity of the brake chamber, causing The unlocking rod moves in the direction away from the high-pressure gas chamber. During the movement, the slope on the end of the unlocking rod abuts against the upper end surface of the limit slide and pushes the limit slide downward, so that the limit slide is no longer stuck in the limit groove of the impact rod, so that the elastic element II in the compressed state releases its elastic potential energy, and the impact rod moves toward the direction of the high-pressure gas chamber and hits the valve stem, so that the high-pressure gas in the high-pressure gas chamber is instantly sprayed into the impact chamber and instantly pushes the impact rod, so that the impact head on the impact rod hits the door lock once, and a single door breaking action is completed at this time; (3) When repeatedly breaking the door, after completing a single door-breaking action, if the door lock is not completely destroyed, the fire air breathing system will inflate the high-pressure gas chamber again. When the impact rod is performing the first impact action, the limit groove is smoothly connected to the outer peripheral surface of the impact rod due to the end facing the brake piston. Therefore, at the moment of impact, the limit hole on the limit slide will not abut against the limit groove. When the impact rod returns to its position, the abutting surface of the limit groove will abut against the limit slide. At this time, the fire state is entered again. Pressing the valve II switch again can perform the second door-breaking action. This can be repeated many times until the door-breaking operation is completed.

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