A pressure relief mechanism for a fire extinguisher valve

Abstract

This utility model belongs to the field of fire extinguisher technology, and in particular to a pressure relief mechanism for a fire extinguisher valve. It includes a fire extinguisher body with a pressure relief port on one side. This utility model utilizes the principle that when the internal gas pressure of the fire extinguisher body increases, it generates a thrust on the piston plate. The piston plate, under pressure, moves the connecting rod, which in turn pushes the moving plate, opening the pressure relief port. High-pressure gas enters the pressure relief cover through the port and is discharged through multiple pressure relief holes, achieving automatic pressure relief. During adjustment, the T-shaped rod is pulled to disengage it from the current adjustment slot. The moving fixed block, via a slider, moves the adjustment plate, compressing the spring. This results in the spring initially being in various degrees of compression. The compressed spring exerts significantly increased damping force on the piston plate, allowing adjustment of the spring compression level to achieve different damping forces on the piston plate, thereby adjusting the pressure relief value.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguisher technology, specifically to a pressure relief mechanism for a fire extinguisher valve. Background Technology

[0002] Fire extinguishers are common fire-fighting equipment found in various public places or places where fires may occur, used to extinguish fires. In actual operation, in order to ensure that the fire extinguisher can spray the extinguishing agent smoothly at critical moments, the fire extinguisher usually has a strong gas pressure inside. However, when the fire extinguisher encounters high temperature, collision, or the extinguishing agent inside it condenses, the internal pressure may exceed the standard. At this time, there is a risk of explosion when the fire extinguisher is activated.

[0003] Chinese patented invention CN219941647U discloses a pressure relief mechanism for a fire extinguisher valve, specifically relating to the field of fire extinguisher pressure relief. This invention includes a fire extinguisher body, a handle at the upper end of the body, a nozzle at the upper end of the body, a pressure gauge at the upper end of the body, and a pressure relief device on the surface of the body. The pressure relief device includes a mounting base, one end of which is fixedly connected to the fire extinguisher body. A pressure relief port is opened on the surface of the mounting base, extending into the interior of the fire extinguisher body. A ring plate is fixedly connected to one end of the inner wall of the pressure relief port. This invention, through the pressure relief device, effectively releases the pressure inside the fire extinguisher body through the pressure relief port.

[0004] However, the device still has some problems. In actual use, the device cannot automatically release pressure and needs to be manually operated. Moreover, it is not convenient to adjust the pressure release as needed. Furthermore, after long-term use, the elastic fatigue of the spring-type pressure relief valve makes it difficult to adjust, resulting in a significant reduction and deficiency in rebound sensitivity and damping force. Therefore, we propose a pressure relief mechanism for fire extinguisher valves to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a pressure relief mechanism for fire extinguisher valves, solving the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A pressure relief mechanism for a fire extinguisher valve includes a fire extinguisher body. A pressure relief port is provided on one side of the fire extinguisher body, and a pressure relief cover is provided on one side of the pressure relief port. One side of the pressure relief cover is fixedly connected to one side of the fire extinguisher body. Multiple pressure relief holes are arranged in a ring on the pressure relief cover. A piston plate is provided inside the pressure relief cover. A connecting rod is welded to one side of the piston plate. A protective cover is fixedly connected to the other side of the pressure relief cover. The end of the connecting rod extends into the protective cover and is welded to a movable plate. Two positioning rods are welded between the other side of the pressure relief cover and the inner wall of one side of the protective cover. A slider is slidably connected to the positioning rod. An adjusting plate is welded between the two sliders. Multiple springs are fixedly connected between one side of the adjusting plate and one side of the movable plate. Multiple adjusting grooves are provided on one side of one of the positioning rods. A fixing block is welded to one side of one of the sliders. A T-shaped rod is provided on the fixing block. The T-shaped rod engages with one of the adjusting grooves. A tension spring is welded between the inner wall of one side of the T-shaped rod and one side of the fixing block.

[0010] Furthermore, the tension spring is movably sleeved on the T-shaped rod.

[0011] Furthermore, rectangular holes are provided on the inner walls of both sides of the protective cover, and the inner walls of the rectangular holes are slidably connected to the outer sides of the corresponding sliders.

[0012] Furthermore, a guide hole is provided on one inner wall of the pressure relief cover, and the pressure relief cover is slidably connected to the connecting rod through the guide hole.

[0013] Furthermore, the slider has a square hole, through which it is slidably connected to the corresponding positioning rod.

[0014] Furthermore, the fixing block has a through hole, and the fixing block is slidably connected to the T-shaped rod through the through hole.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a pressure relief mechanism for a fire extinguisher valve, which has the following advantages:

[0017] This invention utilizes the thrust generated by the increased internal gas pressure of the fire extinguisher body on the piston plate. The piston plate, under pressure, moves the connecting rod, which in turn moves the movable plate, opening the pressure relief port. High-pressure gas enters the pressure relief hood through the port and is discharged into the external environment through multiple pressure relief holes, achieving automatic pressure relief. During adjustment, the T-shaped rod is pulled to disengage it from the current adjustment slot. The movable fixed block moves the adjustment plate via a slider, compressing the spring. This results in the spring being initially in various degrees of compression. The compressed spring exerts significantly increased damping force on the piston plate, allowing adjustment of the spring's compression level to achieve different damping forces on the piston plate, thereby adjusting the pressure relief value. This method can also correct spring fatigue from prolonged use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the pressure relief cover of this utility model cut open;

[0020] Figure 3 This is a three-dimensional structural diagram of the pressure relief cover and protective cover of this utility model after they are concealed.

[0021] Figure 4 This is a cutaway three-dimensional structural diagram of the pressure relief cover and protective cover of this utility model.

[0022] In the diagram: 1. Fire extinguisher body; 2. Pressure relief port; 3. Pressure relief cover; 4. Pressure relief hole; 5. Piston plate; 6. Connecting rod; 7. Moving plate; 8. Protective cover; 9. Positioning rod; 10. Sliding block; 11. Adjusting plate; 12. Spring; 13. Adjusting groove; 14. Fixing block; 15. T-shaped rod; 16. Tension spring; 17. Rectangular hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] like Figure 1-4As shown in the figure, an embodiment of the present invention discloses a pressure relief mechanism for a fire extinguisher valve, including a fire extinguisher body 1. A pressure relief port 2 is provided on one side of the fire extinguisher body 1, and a pressure relief cover 3 is provided on one side of the pressure relief port 2. One side of the pressure relief cover 3 is fixedly connected to one side of the fire extinguisher body 1. Multiple pressure relief holes 4 are provided in a ring on the pressure relief cover 3. A piston plate 5 is provided inside the pressure relief cover 3. A connecting rod 6 is welded to one side of the piston plate 5. A protective cover 8 is fixedly connected to the other side of the pressure relief cover 3. The end of the connecting rod 6 extends into the protective cover 8 and is welded with a movable plate 7. The other side of the pressure relief cover 3 and one side of the protective cover 8 are connected to the protective cover 8. Two positioning rods 9 are welded between the walls. A slider 10 is slidably connected to the positioning rod 9. An adjusting plate 11 is welded between the two sliders 10. Multiple springs 12 are fixedly connected between one side of the adjusting plate 11 and one side of the moving plate 7. Multiple adjusting grooves 13 are opened on one side of one of the positioning rods 9. A fixing block 14 is welded to one side of one of the sliders 10. A T-shaped rod 15 is provided on the fixing block 14. The T-shaped rod 15 is engaged with one of the adjusting grooves 13. A tension spring 16 is welded between the inner wall of one side of the T-shaped rod 15 and one side of the fixing block 14.

[0026] During use, when the internal gas pressure of the fire extinguisher body 1 increases, and the thrust generated by the gas pressure on the piston plate 5 exceeds the elastic force of the spring 12, the piston plate 5 will move away from the pressure relief port 2 under the action of pressure. The movement of the piston plate 5 drives the connecting rod 6 to move together, and the connecting rod 6 pushes the moving plate 7 to move within the protective cover 8 and compresses the spring 12. As the piston plate 5 moves, the pressure relief port 2 is opened, and the high-pressure gas and part of the extinguishing medium inside the fire extinguisher body 1 can enter the pressure relief cover 3 through the pressure relief port 2 and be discharged into the external environment through multiple pressure relief holes 4, thereby realizing the automatic pressure relief function. When the elasticity of the spring 12 weakens due to prolonged use, or when it is necessary to adjust the damping force of the spring 12 on the piston plate 5 to adjust the pressure relief value, pull the T-shaped rod 15. During the movement of rod 15, the tension spring 16 is stretched, causing it to disengage from the current adjustment slot 13. The moving fixed block 14 drives the adjustment plate 11 to move via slider 10. The adjustment plate 11 compresses the spring 12, so that the spring 12 is initially in various degrees of compression. The damping force of the compressed spring 12 on the piston plate 5 is obviously increased. The degree of compression of the spring 12 can be adjusted as needed to adjust the different damping forces on the piston plate 5, thereby adjusting the pressure value of the pressure relief. After adjustment, the force on the T-shaped rod 15 is released, and the tension spring 16, which is in a stretched state, returns to its original position. The tension spring 16 drives the T-shaped rod 15 to engage with another adjustment slot 13. In this way, the spring 12 that has experienced elastic fatigue after long-term use can also be corrected.

[0027] In some embodiments, the tension spring 16 is movably sleeved on the T-shaped rod 15.

[0028] When the fire extinguisher is in normal storage and use condition, the internal pressure of the fire extinguisher body 1 is within a safe range. At this time, the thrust generated by the gas pressure inside the fire extinguisher body 1 on the piston plate 5 is less than the elastic force of the spring 12. Under the action of the elastic force of the spring 12, the piston plate 5 is tightly attached to the pressure relief port 2, sealing the pressure relief port 2 and preventing the extinguishing medium and gas inside the fire extinguisher body 1 from leaking out through the pressure relief port 2, thus ensuring the normal storage and use function of the fire extinguisher.

[0029] In some embodiments, rectangular holes 17 are provided on both inner walls of the protective cover 8. The inner wall of the rectangular hole 17 is slidably connected to the outer side of the corresponding slider 10. A guide hole is provided on one inner wall of the pressure relief cover 3. The pressure relief cover 3 is slidably connected to the connecting rod 6 through the guide hole.

[0030] The piston plate 5 moves, causing the connecting rod 6 to move together. The connecting rod 6 then pushes the moving plate 7 to move inside the protective cover 8 and compresses the spring 12. As the piston plate 5 moves, the pressure relief port 2 is opened.

[0031] In some embodiments, the slider 10 has a square hole, and the slider 10 is slidably connected to the corresponding positioning rod 9 through the square hole.

[0032] In some embodiments, the fixing block 14 has a through hole, and the fixing block 14 is slidably connected to the T-shaped rod 15 through the through hole.

[0033] The through-hole design prevents the T-shaped rod 15 from shifting when it moves on the fixed block 14.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure relief mechanism for a fire extinguisher valve, comprising a fire extinguisher body (1), characterized in that: The fire extinguisher body (1) has a pressure relief port (2) on one side, and a pressure relief cover (3) is provided on one side of the pressure relief port (2). One side of the pressure relief cover (3) is fixedly connected to one side of the fire extinguisher body (1). Multiple pressure relief holes (4) are provided in a ring on the pressure relief cover (3). A piston plate (5) is provided inside the pressure relief cover (3). A connecting rod (6) is welded to one side of the piston plate (5). A protective cover (8) is fixedly connected to the other side of the pressure relief cover (3). The end of the connecting rod (6) extends into the protective cover (8) and is welded with a moving plate (7). Two positioning rods (9) are welded between the other side of the pressure relief cover (3) and the inner wall of one side of the protective cover (8). A slider (10) is slidably connected to the upper part of the sliding plate (7). An adjustment plate (11) is welded between the two sliders (10). A plurality of springs (12) are fixedly connected between one side of the adjustment plate (11) and one side of the moving plate (7). A plurality of adjustment grooves (13) are opened on one side of one of the two positioning rods (9). A fixing block (14) is welded to one side of one of the two sliders (10). A T-shaped rod (15) is provided on the fixing block (14). The T-shaped rod (15) is engaged with one of the adjustment grooves (13). A tension spring (16) is welded between the inner wall of one side of the T-shaped rod (15) and one side of the fixing block (14). The tension spring (16) is movably sleeved on the T-shaped rod (15); Rectangular holes (17) are provided on the inner walls of both sides of the protective cover (8), and the inner walls of the rectangular holes (17) are slidably connected to the outer sides of the corresponding sliders (10). A guide hole is provided on one side inner wall of the pressure relief cover (3), and the pressure relief cover (3) is slidably connected to the connecting rod (6) through the guide hole; The slider (10) has a square hole, and the slider (10) is slidably connected to the corresponding positioning rod (9) through the square hole; The fixing block (14) has a through hole, and the fixing block (14) is slidably connected to the T-shaped rod (15) through the through hole.

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