A quick-opening valve pneumatic system and device suitable for fire fighting operations

Abstract

This invention provides a quick-opening valve pneumatic system and device suitable for firefighting operations. It is easy for firefighters to use, convenient, quick, and highly safe. It is applicable to a wide range of valve types. The pneumatic system comprises one or more gas cylinders, each equipped with a shut-off valve, connected via an N-way quick connector. The input of a gas source regulating device is connected to the output of the N-way quick connector. The input of a speed regulating valve is connected to the output of the gas source regulating device. The inputs of a first and second check valve are connected to the output of the speed regulating valve. The first and second check valves are interlocked. The output of the first check valve is connected to the control pneumatic circuit of a friction pliers. The output of the second check valve is connected to the control pneumatic circuit of a pneumatic saw. The quick-opening valve device uses this pneumatic system. The quick-opening valve includes a fire truck and friction pliers and a pneumatic saw connected to the fire truck.

Description

Technical Field

[0001] This invention relates to the field of specialized instruments for opening valves, and more specifically, to a rapid valve switching air circuit system and device suitable for fire fighting operations. Background Technology

[0002] Currently, during firefighting operations, when power or gas is cut off at the fire scene, large oil and gas pipeline valves can only be opened and closed by turning handwheels. This is difficult, time-consuming, and inefficient, posing a significant threat to the personal safety of firefighters. In response to the current problems and industry status quo regarding valve operation in firefighting, there is a need to develop rapid valve opening and closing equipment for fire scenes.

[0003] Patent application number: CN202123303861.1, a quick-opening and quick-closing device for valve cleaning without disassembly. It solves the problem of quick-opening and closing valves, but it is not designed for fire rescue scenarios and has at least the following drawbacks:

[0004] 1. This solution uses an electric motor as the driving device. If this device is used in a fire, firefighters need to wrap the battery with a heat insulation device before fighting the fire, which takes a long time and may delay the fire. Therefore, it is not suitable for fire rescue.

[0005] 2. The clamping device in this solution is driven by a chuck assembly. When carrying out firefighting operations, it is impossible to determine the handwheel size of the large valve to be operated in advance. If different sized chucks are carried, the firefighters will carry too much weight during the operation, making the operation inconvenient. In addition, the manufacturing cost of this device is high. Summary of the Invention

[0006] The purpose of this invention is to provide a quick-opening valve air circuit system and device suitable for fire fighting operations, which is easy for firefighters to use, convenient and quick to operate, and has high safety performance; it is applicable to a wide range of valve types.

[0007] The embodiments of the present invention are implemented as follows:

[0008] A quick-opening valve pneumatic system suitable for firefighting operations includes: a gas cylinder group, a gas source regulating device, a speed regulating valve, a first check valve and a second check valve, a friction pliers control pneumatic system, and a pneumatic saw control pneumatic system. The gas cylinder group includes one or more gas cylinders, each equipped with a shut-off valve, and connected via an N-way quick connector. The input end of the gas source regulating device is connected to the output end of the N-way quick connector. The input end of the speed regulating valve is connected to the output end of the gas source regulating device. The input ends of the first and second check valves are connected to the output ends of the speed regulating valve. The first and second check valves are interlocked. The output end of the first check valve is connected to the friction pliers control pneumatic system, and the output end of the second check valve is connected to the pneumatic saw control pneumatic system.

[0009] In a preferred embodiment of the present invention, the above-mentioned friction pliers control air circuit includes a three-position five-way reversing valve and a pneumatic motor. The input end of the three-position five-way reversing valve is connected to a first check valve; the output end of the three-position five-way reversing valve is connected to the pneumatic motor, and the pneumatic motor is mounted on the friction pliers.

[0010] In a preferred embodiment of the present invention, a silencer is connected to the outlet of the three-position five-way reversing valve.

[0011] In a preferred embodiment of the present invention, the air saw control circuit includes an air saw and a button valve. When the air saw is needed, the input end of the air saw is connected to the output end of the second one-way valve. When the air saw is not in operation, it is placed at the button valve. The button valve and the second one-way valve are interlocked. When the button valve releases the air saw, the air saw is connected to the second one-way valve and starts working.

[0012] A quick-opening valve device suitable for fire fighting operations includes any of the above-mentioned air circuit systems. The quick-opening valve device includes a friction gripper connected to the air circuit of the friction gripper via a flexible shaft.

[0013] In a preferred embodiment of the present invention, the friction pliers include: a friction pliers body, a smooth cylinder, and a friction cylinder. A tension spring is provided at the jaw end of the friction pliers body near the jaws. An assembly groove is provided on the inner side of each jaw of the friction pliers body, and a bearing is provided in the assembly groove. The smooth cylinder is disposed in one of the assembly grooves, and a first rotating shaft is provided at both ends of the smooth cylinder. The first rotating shaft is connected to the bearing in the corresponding assembly groove. The friction cylinder is disposed in the other assembly groove, and the assembly method is the same as that of the smooth cylinder. A second rotating shaft of the friction cylinder near the jaws extends out of the assembly groove and is connected to a coupling. The coupling is connected to a flexible shaft.

[0014] In a preferred embodiment of the present invention, the axes of the first and second rotating shafts are inclined at 2° relative to the axis of symmetry of the friction pliers body.

[0015] In a preferred embodiment of the present invention, the outer walls of the smooth cylinder and the friction cylinder are provided with concave arc-shaped recesses.

[0016] In a preferred embodiment of the present invention, the above-mentioned quick-opening valve device further includes a fire truck, with a gas cylinder placement area below the fire truck and a workbench at the top of the gas cylinder placement area. A pneumatic motor is fixedly installed inside the workbench, and a flexible shaft extends out from the workbench. The friction pliers body and the pneumatic saw are placed on the workbench when not in use.

[0017] In a preferred embodiment of the present invention, the fire truck is further provided with a protective cover that covers the gas cylinder.

[0018] The beneficial effects of this invention are as follows: The pneumatic system is suitable for quickly opening and closing large valves, using pneumatic means to rapidly activate friction pliers and pneumatic saws, and can operate in harsh environments such as flammable, explosive, humid, and impact-prone conditions; it also allows for adjustment of the air output, enabling the rapid valve opening and closing device to achieve rapid valve opening and closing, greatly improving the response speed of firefighting operations; the rapid valve opening device is trolley-based, and the overall structure of the friction pliers is lightweight and convenient to use, while also enabling rapid transfer during fire rescue; the axes of the first and second rotating shafts of the friction pliers have a symmetrical axis of inclination relative to the friction pliers body, which is beneficial for the pliers to better clamp the handwheels of large valves. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the connection of the quick-opening valve air circuit system according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the air saw inserted into the workbench according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the quick-opening valve device according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the friction pliers structure according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the workbench control panel structure according to an embodiment of the present invention;

[0025] Figure 6 The diagram illustrates several types of valve handwheels as described in embodiments of the present invention.

[0026] Icons: A - Gas cylinder group; M3 - Gas source regulating device; C1 - Speed ​​control valve; B1 - First check valve; B2 - Second check valve; D - Three-position five-way reversing valve; M1 - Pneumatic motor; D1 - Silencer; S3 - Third switch; S4 - Fourth switch; M2 - Pneumatic saw; C2 - Push-button valve; S2 - Switch button;

[0027] 100-Fire truck; 110-Workbench; 111-Control panel; 120-Gas cylinder placement plate; 130-Protective cover; 140-Frame;

[0028] 200-Friction pliers; 210-Friction pliers body; 220-Smooth cylinder; 230-Friction cylinder; 240-Coupling; 250-Flexible shaft; 211-Tension spring; 212-Assembly slot; 213-Bearing; 221-First rotating shaft; 231-Second rotating shaft. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] First Embodiment

[0036] Please see Figure 1 This embodiment provides a quick-opening valve air circuit system suitable for fire fighting operations. The air circuit system includes: a gas cylinder group A, a gas source regulating device M3, a speed regulating valve C1, a first one-way valve B1 and a second one-way valve B2, a friction pliers control air circuit, and a pneumatic saw control air circuit. The gas cylinder group A includes one or more gas cylinders, each equipped with a shut-off valve, which is then connected via an N-way quick connector. In this embodiment, four gas cylinders are used, hence a five-way quick connector. The input end of the gas source regulating device M3 is connected to the output end of the N-way quick connector. The input end of the speed regulating valve C1 is connected to the output end of the gas source regulating device M3. The input ends of the first one-way valve B1 and the second one-way valve B2 are connected to the output end of the speed regulating valve C1. The first one-way valve B1 and the second one-way valve B2 are interlocked. The output end of the first one-way valve B1 is connected to the friction pliers control air circuit; the output end of the second one-way valve B2 is connected to the pneumatic saw control air circuit.

[0037] Each gas cylinder is equipped with a shut-off valve. Opening one or more shut-off valves allows gas to be introduced from the five-way quick connector into the gas source regulating device M3. The gas output is then controlled by the speed regulating valve C1, which in turn controls the rotation speed of the pneumatic motor during the operation of the friction pliers, thereby controlling the rotation speed of the valve handwheel. This invention enables the valves to close and open quickly, significantly improving the response speed of firefighting operations. The first one-way valve B1 and the second one-way valve B2 are interlocked; either the first one-way valve B1 or the second one-way valve B2 is active. The control panel allows selection of the gas source to enter either the first one-way valve B1 or the second one-way valve B2 for corresponding activation.

[0038] The friction pliers control air circuit includes a three-position five-way directional valve D and a pneumatic motor M1. The input end of the three-position five-way directional valve D is connected to the first one-way valve B1; the output end of the three-position five-way directional valve D is connected to the pneumatic motor M1, which is mounted on the friction pliers 200. A silencer D1 is connected to the air outlet of the three-position five-way directional valve D.

[0039] When the friction pliers 200 are activated, the first one-way valve B1 is open, and the second one-way valve B2 is closed. Air enters the three-position five-way directional valve D, which is equipped with third and fourth switches (S3 and S4) to control its reversing, thereby enabling the pneumatic motor M1 to rotate forward or backward, thus achieving quick opening and closing of the valve. The output of the three-position five-way directional valve D is connected to an air pipe, which is then connected to the air inlet of the pneumatic motor M1 via a quick connector. The pneumatic motor M1 drives the friction cylinder to rotate, and the friction between the cylinder and the valve handwheel drives the handwheel to rotate.

[0040] The pneumatic saw control circuit includes the pneumatic saw M2 and the push-button valve C2. When the pneumatic saw M2 is needed (e.g., if the valve handwheel has a handle, firefighters can directly saw off the handle of the handwheel, expanding the applicability of the quick-opening valve device), the input end of the pneumatic saw M2 is connected to the output end of the second one-way valve B2. When the pneumatic saw M2 is not in operation, it is placed at the push-button valve C2. The push-button valve C2 and the second one-way valve B2 are interlocked. When the push-button valve C2 releases the pneumatic saw M2, the pneumatic saw M2 is connected to the second one-way valve B2 and starts working.

[0041] The input terminal of the second check valve B2 is connected to the output terminal of the speed control valve C1. A switch button S2 is installed on the second check valve B2 to control the start and stop of the pneumatic saw M2. Please refer to [link / reference]. Figure 2 When not in use, the air saw M2 can be directly inserted into the semi-circular hole on the rear end of the workbench. The semi-circular hole has a button valve C2 with a spring at the bottom as a safety protection device for the air saw M2 to prevent accidental injury.

[0042] Please see Figure 3 This embodiment also provides a quick-opening valve device suitable for fire fighting operations. Using the above-mentioned air circuit system, the quick-opening valve device includes a friction hand pliers 200 connected to a friction hand pliers 200 via a flexible shaft to control the air circuit, and a fire truck 100.

[0043] Specifically, the friction pliers 200 includes a friction pliers body 210, a smooth cylinder 220, a friction cylinder 230, a coupling 240, and a flexible shaft 250. Please refer to [link / reference needed]. Figure 4 .

[0044] A tension spring 211 is located near the jaws of the friction pliers body 210. The tension spring 211 is used to tightly clamp the valve handwheel between the friction cylinder 230 and the smooth cylinder 220 when the friction pliers 200 is in operation. The tension spring 211 is fixed to the upper part of the jaws (fixing pin) of the friction pliers 200. When the handle of the friction pliers 200 is pinched, the jaws open, and the valve handwheel is inserted into the concave area of ​​the friction cylinder 230 and the smooth cylinder 220. Releasing the handle allows the tension spring 211 to press the handwheel tightly against the friction cylinder 230 and the smooth cylinder 220, thus tightening the valve handwheel. In the non-operating state, the jaws close under the action of the spring, and the handle opens.

[0045] The friction pliers body 210 has an assembly groove 212 on the inner side of each jaw, and a bearing 213 is provided in the assembly groove 212 for assembling the smooth cylinder 220 and the friction cylinder 230.

[0046] A smooth cylinder 220 is disposed in one of the assembly slots 212. The two ends of the smooth cylinder 220 are provided with a first rotating shaft 221, which is connected to a bearing 213 in the corresponding assembly slot 212.

[0047] The friction cylinder 230 is disposed in another assembly groove 212, and the assembly method is the same as that of the smooth cylinder 220. The second rotating shaft 231 of the friction cylinder 230 near the jaw end extends out of the assembly groove 212 and is connected to the coupling 240, which is connected to the flexible shaft 250. The outer walls of the smooth cylinder 220 and the friction cylinder 230 are provided with concave arc-shaped recesses.

[0048] A friction cylinder 230 with a high coefficient of friction on its surface material is connected to the second rotating shaft 231 via a key, while a smooth cylinder 220 with a very low coefficient of friction on its surface material is mounted on the first rotating shaft 221. During operation, the friction cylinder 230 rotates with the second rotating shaft 231, driving the valve handwheel to rotate through the frictional force of its contact surface with the valve handwheel; the rotating shaft containing the smooth cylinder 220 has no transmission, so the smooth cylinder 220 does not rotate.

[0049] When working, pinch the handle of the friction pliers body 210, open the jaws, and insert the valve handwheel into the concave arc of the friction cylinder 230 and the smooth cylinder 220. Then release the handle, and the jaws will close under the tension of the tension spring 211. That is, the tension of the tension spring 211 will cause the handwheel to be pressed by the friction cylinder 230 and the smooth cylinder 220, so as to achieve the purpose of clamping and fixing the valve handwheel by the friction pliers 200.

[0050] To prevent the jaws of the friction chuck 200 from opening when the valve handwheel is wedged between the two cylinders, the axes of the first rotating shaft 221 and the second rotating shaft 231 are inclined at 2° relative to the axis of symmetry of the friction chuck body 210. During operation, the handwheel is driven to rotate by the friction force between the rotating friction cylinder 230 and the valve handwheel, while the smooth cylinder 220 provides positive pressure. Compared to a three-jaw chuck, it is lighter and easier to operate.

[0051] Furthermore, the jaws of the friction pliers 210 are at a considerable distance from the fixed pin, enabling the invention to operate the steering wheel handwheel valve. The friction pliers 200, when used in combination with the pneumatic saw M2, achieve the invention's goal of quickly opening and closing the handle-operated handwheel. Figure 6 This invention is applicable to valve handwheel types.

[0052] The lower part of the fire truck 100 is a gas cylinder storage area, and the top of the gas cylinder storage area is a workbench 110. The workbench 110 is equipped with a control panel 111. The control panel diagram is shown below. Figure 5 The pneumatic motor M1 is fixedly installed inside the workbench 110, the flexible shaft 250 extends out from the workbench 110, and the friction pliers body 210 and the air saw M2 are placed on the workbench 110 when not in use.

[0053] Specifically, the right end of the flexible shaft 250 is fixedly connected to the coupling 240 via a key, and the coupling 240 is connected to the pneumatic motor M1 via a key; the left end of the flexible shaft 250 is connected to the rotating shaft of the friction pliers 200 via the coupling 240. The flexible shaft 250 is a mechanical transmission, which solves the problem of remote operation. For example, for valves in dangerous locations or those difficult for firefighters to access, or valves in confined spaces where firefighters' movement is restricted, power can be transmitted over long distances via the flexible shaft 250. Firefighters only need to use the friction pliers 200 to lock the valve handwheel to directly retreat to a safe position for operation.

[0054] The fire truck 100 includes a gas cylinder placement plate 120, a protective cover 130, and a frame 140, which are fixedly connected by welding. The right end face of the workbench 110 is fixedly connected to the upper part of the fire truck 100. To maintain the stability of the workbench 110, a reinforcing rib is provided between its bottom surface and the fire truck 100. Four gas cylinders at the bottom of the truck are fixed to the gas cylinder placement plate 120 by the protective cover 130. The protective cover 130 protects the gas cylinders and improves safety in a fire.

[0055] The advantages of using the quick-opening valve device in this embodiment include at least the following:

[0056] 1. This quick-operation valve device is simple and convenient to use. During firefighting operations, simply push the cart to the desired location, engage the friction pliers 200 with the valve handwheel, and press the friction pliers 200 switch on the control panel 111 to begin operation immediately. For valves with a handle handwheel (see [link to relevant documentation]),... Figure 6 If you have a handwheel valve (as shown in the image), you can simply remove the pneumatic saw M2, turn on the control switch, and saw off the handle to continue using the friction pliers 200 for quick valve closing.

[0057] 2. The clamping part adopts a friction chuck 200. The two rotating shafts of the friction chuck 200 are each inclined at 2° relative to the axis of symmetry of the friction chuck 200, which prevents the jaws of the friction chuck 200 from opening when the valve handwheel is stuck between the two shafts. During firefighting operations, the friction between the friction cylinder 230 and the valve handwheel drives the handwheel to rotate. The smooth cylinder 220 provides positive pressure. Compared with a three-jaw chuck, it is lighter and easier to operate.

[0058] 3. The transmission is carried out using a flexible shaft 250, which has a simple transmission structure and can bend at any angle within the bending radius, enabling long-distance power transmission. It can better adapt to complex on-site layout requirements and can work normally even when the valve is located at a high position or has limited space, and when there is external impact, which is extremely convenient.

[0059] 4. It adopts a trolley-type valve quick-closing and quick-opening device. The trolley is equipped with gas cylinders, pneumatic motor M1 and clamping device, which can be quickly transferred to the rescue site and put into use during fire rescue, with high efficiency.

[0060] 5. Gas cylinders are used for transporting gas. After the gas is used up, firefighters can refill the cylinders themselves for recycling, reducing costs. The drive unit uses a pneumatic motor M1. Compared with electric motors, the pneumatic motor M1 is easy to operate in both forward and reverse directions, has a simple structure, is small in size, and can rotate at high speed. It can work in harsh environments and is highly efficient and safe during fire rescue.

[0061] 6. The present invention includes a friction hand pliers 200 and an air saw M2. The friction hand pliers 200 has a long distance between the jaws and the fixed pin position, and can be used for valves with handle handwheels, steering wheel handwheels and ordinary handwheels. The present invention has a wide range of applications.

[0062] This specification describes examples of embodiments of the invention, but does not imply that these embodiments illustrate or describe all possible forms of the invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the invention in various forms. Those skilled in the art will understand that multiple features illustrated and described with reference to any of the drawings can be combined with features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The illustrated combinations of features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the invention may be used as needed for specific applications or implementations.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A quick-opening valve device suitable for firefighting operations, characterized in that, include: The gas system includes: a gas cylinder group comprising one or more gas cylinders, each cylinder group equipped with a shut-off valve and connected via an N-port quick connector; a gas source regulating device, the input of which is connected to the output of the N-port quick connector; a speed regulating valve, the input of which is connected to the output of the gas source regulating device; a first check valve and a second check valve, the inputs of which are connected to the output of the speed regulating valve; the first check valve and the second check valve are interlocked; a friction pliers control gas circuit, the output of which is connected to the friction pliers control gas circuit; and a pneumatic saw control gas circuit including a pneumatic saw, the output of which is connected to the pneumatic saw control gas circuit. When the pneumatic saw is needed, firefighters can saw off the handle of the handwheel to expand the applicability of the quick-opening valve device. A friction pliers, connected to a control air circuit via a flexible shaft; the friction pliers include a pliers body, with a tension spring located near the jaws at the jaw end; each jaw of the pliers body has an inner mounting groove containing a bearing; a smooth cylinder is disposed within one of the mounting grooves, with first rotating shafts at both ends connected to bearings in their respective mounting grooves; a friction cylinder is disposed within the other mounting groove, assembled in the same way as the smooth cylinder, with a second rotating shaft near the jaws extending outside the mounting groove and connected to a coupling, which is connected to the flexible shaft; the axes of the first and second rotating shafts are inclined at 2° relative to the axis of symmetry of the pliers body; the outer walls of the smooth and friction cylinders have concave arc-shaped recesses.

2. The quick-opening valve device suitable for firefighting operations according to claim 1, characterized in that, The friction pliers control air circuit includes: a three-position five-way directional valve, the input end of which is connected to the first one-way valve; and a pneumatic motor, the output end of which is connected to the pneumatic motor, which is mounted on the friction pliers.

3. The quick-opening valve device suitable for fire fighting operations according to claim 2, characterized in that, The outlet of the three-position five-way reversing valve is connected to a silencer.

4. The quick-opening valve device suitable for firefighting operations according to claim 1, characterized in that, When the air saw is needed, connect the input end of the air saw to the output end of the second one-way valve; The pneumatic saw control circuit also includes a button valve. When the pneumatic saw is not in operation, it is placed at the button valve. The button valve and the second one-way valve are interlocked. When the button valve releases the pneumatic saw, the pneumatic saw is connected to the second one-way valve and starts working.

5. The quick-opening valve device suitable for fire fighting operations according to claim 1, characterized in that, The quick-opening valve device also includes: a fire truck, with a gas cylinder placement area below the fire truck, a workbench on top of the gas cylinder placement area, a pneumatic motor fixedly installed inside the workbench, a flexible shaft extending out from the workbench, and the friction pliers body and the air saw placed on the workbench when not in use.

6. The quick-opening valve device suitable for firefighting operations according to claim 5, characterized in that, The fire truck is also equipped with a protective cover that covers the gas cylinder.

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