Safety pressure relief device for fire extinguishing

Abstract

The utility model discloses a safety pressure relief device for fire extinguishing, which belongs to the technical field of fire extinguishing systems and comprises a pipeline and a box arranged on one side of the pipeline, a lantern ring is fixedly sleeved on the side wall of one end of the pipeline close to the box, a connecting plate is fixedly mounted between the lantern ring and the box, a detection valve is arranged on the side wall of the pipeline, and the side wall of the pipeline is communicated with a pressure relief pipe. A baffle ring is fixedly installed in the pipeline, a piston is slidably installed in the conveying pipeline, and a driving assembly is arranged on the side, away from the baffle ring, of the piston. The side wall of the pressure relief pipe is fixedly sleeved with an installation ring, and a protection plate is arranged above the pressure relief pipe. Through the arrangement of the driving assembly, the gear motor drives the threaded sleeve to rotate, the threaded sleeve drives the threaded rod to push the piston to move in the pipeline, the effect of blocking or opening the pressure relief pipe is achieved, the pressure relief effect can be achieved, manual adjustment is not needed, and the use safety of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing system technology, and more specifically, to a safety pressure relief device for fire extinguishing. Background Technology

[0002] Fire suppression systems are an important safety measure, especially in densely populated areas. They are extremely useful in the event of a fire. These systems operate under high pressure to ensure rapid response to the fire. However, in practice, external environmental factors can cause pressure fluctuations. Excessive pressure can lead to explosions, potentially injuring or even killing people nearby. Therefore, it is necessary to release the pressure when it is too high.

[0003] Patent application number 201821435380.1 discloses a safety pressure relief device for a fire extinguishing system, including a fire extinguishing device. A hollow steel pipe is disposed in the middle of one side of the outer surface of the fire extinguishing device. One side of the inner surface of the hollow steel pipe is connected to the outer surface of a threaded ring. A sealing gasket is disposed in one side of the outer surface of the threaded ring. The inner surface of the threaded ring is connected to the outer surface of a threaded push rod. A return spring is disposed in one side of the outer surface of the threaded push rod. A blocking gasket is disposed in one side of the outer surface of the hollow steel pipe. One end of the threaded push rod is connected to the inner surface of a double-threaded sleeve. The outer surface of the double-threaded sleeve is connected to the inner surface of a rubber sleeve. The other side of the outer surface of the hollow steel pipe is connected to the middle of a sealing plate. This utility model, through the use of auxiliary rubber rings and blocking gaskets, and the use of turning handles and guide rods, can relieve pressure on the fire extinguishing system.

[0004] Regarding the aforementioned technologies, the pressure can be gradually released through the pressure relief port by turning the threaded pusher to reach a normal level. However, some gas extinguishing systems are filled with heptafluoropropane, which, although low in toxicity, still poses a certain hazard. The proposed utility model involves manually turning the threaded pusher, which could endanger workers by causing them to inhale heptafluoropropane gas when the equipment is depressurized. Utility Model Content

[0005] To solve the above problems, this utility model provides a safety pressure relief device for fire extinguishing, which adopts the following technical solution:

[0006] A fire extinguishing safety pressure relief device includes a pipe and a box set on one side of the pipe. A collar is fixedly sleeved on the side wall of the pipe near the box. A connecting plate is fixedly installed between the collar and the box. A detection valve is provided on the side wall of the pipe. A pressure relief pipe is connected to the side wall of the pipe. A retaining ring is fixedly installed inside the pipe. A piston is slidably installed inside the conveying pipe. A driving component is provided on the side of the piston away from the retaining ring.

[0007] The pressure relief pipe is fixedly fitted with an installation ring on its side wall, and a protective plate is provided above the pressure relief pipe. Two symmetrically distributed assembly plates are fixedly installed at the bottom of the protective plate, and a positioning component is provided between the two assembly plates and the installation ring.

[0008] By adopting the above technical solution, when the device is in use, the detection valve installed on the side wall of the pipeline detects the air pressure inside the pipeline. When the air pressure inside the pipeline exceeds a constant value, the driving component drives the piston to move towards the housing, thereby disengaging the piston from below the pressure relief pipe and facilitating the gas discharge through the pressure relief pipe, thus achieving the function of pressure relief. When the air pressure inside the pipeline reaches the required value, the driving component drives the piston to move towards the retaining ring, causing the piston to contact the retaining ring, thus positioning the piston and facilitating its movement to below the pressure relief pipe to seal it. A protective plate is provided above the pressure relief pipe to shield the pipe port, helping to prevent foreign objects from falling into the pipe and maintaining its subsequent performance. An assembly plate is provided at the bottom of the protective plate, and a positioning component is provided between the assembly plate and the mounting ring to position and fix the protective plate. All components in this application are assembled using fasteners found in the prior art.

[0009] Furthermore, the drive assembly includes a threaded sleeve disposed within the housing, a screw rod disposed within the threaded sleeve, through holes on both sides of the housing, one end of the screw rod passing through a pipe and fixedly connected to the side opposite to the piston, two symmetrically distributed fixing rings rotatably mounted on the side wall of the threaded sleeve, fixing rods fixedly installed between the two fixing rings and the inner walls on both sides of the housing, a worm gear fixedly mounted on the side wall of the threaded sleeve, a worm shaft rotatably mounted within the housing, the worm shaft and the worm gear meshing, a driven gear fixedly mounted on the lower side wall of the worm shaft, a geared motor fixedly mounted within the housing, a drive gear fixedly mounted on the side wall of the output shaft of the geared motor, the drive gear and the driven gear meshing, a groove is provided on the side wall of the screw rod, a stabilizing rod is slidably mounted within the groove, and the top end of the stabilizing rod is fixedly connected to the inner wall at the top of the housing.

[0010] By adopting the above technical solution, when pressure relief is required, the drive gear is driven by the geared motor to rotate, the drive gear drives the driven gear to rotate, the driven gear drives the worm gear to rotate, the worm gear drives the turbine to rotate, and the turbine drives the threaded sleeve. The screw is located inside the threaded sleeve, and a groove is opened on the side wall of the screw. A stabilizing rod is slidably installed in the groove. The top of the stabilizing rod is fixedly connected to the inner wall of the top of the box. When the threaded sleeve rotates, the screw will not rotate synchronously with the threaded sleeve due to the restriction of the stabilizing rod. Therefore, the rotation of the threaded sleeve can drive the screw to push the piston to move. The screw drives the piston to move towards the box, and then the lower port of the pressure relief pipe flows out. The gas can be discharged from the pressure relief pipe, achieving the effect of pressure relief. No manual adjustment is required, which is beneficial to improving the safety of the equipment. When the gas pressure inside the pipeline reaches the required value, the piston moves towards the retaining ring by the screw, so that the piston contacts the retaining ring, which can play the role of positioning the piston, making it easy for the piston to move to the bottom of the pressure relief pipe, thus achieving the effect of sealing the pressure relief pipe.

[0011] Furthermore, a rubber ring is fixedly installed on the side of the piston away from the housing, and a groove matching the rubber ring is opened on the side of the retaining ring closer to the housing.

[0012] By adopting the above technical solution, a rubber ring is provided on the side of the piston away from the housing. The rubber ring and the groove opened on the side wall of the retaining ring are engaged, which helps to maintain the tightness of the piston and the retaining ring.

[0013] Furthermore, the positioning component includes a plug block fixedly installed at the bottom of two assembly plates. The top of the mounting ring has a slot that matches the plug block. Movable grooves are provided on the inner walls of both sides of the two slots. Positioning rods are slidably installed in the movable grooves. Springs are fixedly connected between the opposite ends of the two positioning rods on the same side and the inner wall of the movable groove on the same side. Positioning grooves that match the positioning rods on the same side are provided on the side walls of the two plug blocks.

[0014] By adopting the above technical solution, when installing the protective plate, the workers place the insert block installed at the bottom of the assembly plate into the slot opened at the top of the installation ring. The engagement of the insert block and the slot serves to initially position the protective plate. When the insert block moves into the slot, the insert block pushes the positioning rod on the same side to slide into the movable groove, and the positioning rod pushes the spring on the same side to retract. When the insert block and the slot on the same side are fully engaged, the positioning rod returns to its original position under the elastic force of the spring, and the positioning rod engages with the positioning groove opened on the side wall of the insert block, which serves to position the insert block and achieve the effect of further fixing the protective plate.

[0015] Furthermore, two symmetrically distributed balance blocks are fixedly installed on the opposite sidewalls of the two positioning rods on the same side, and the inner wall of the movable groove is provided with a balance groove that matches the balance block on the same side.

[0016] By adopting the above technical solution, when the positioning rod slides in the movable groove, the positioning rod, along with the balance block on the same side, slides in the balance groove on the same side. The cooperation between the balance block and the balance groove helps to prevent the positioning rod from detaching from the movable groove.

[0017] Furthermore, support plates are fixedly installed on both sides of the lower section of the two assembly plates, and two sets of symmetrically distributed pressing plates are rotatably installed on the top of the mounting ring. The pressing plates of the same set are located on both sides of the slot on the same side, and the pressing plates are located above the support plates on the same side.

[0018] By adopting the above technical solution, after the assembly plate is attached to the top of the mounting ring, the pressing plate is moved to the top of the support plate on the same side by rotating the pressing plate. The pressing plate presses down on the positioning support plate, which plays a role in positioning and stabilizing the assembly plate. This helps to prevent the protective plate from being pushed out by gas during the depressurization process and helps to maintain the stability of the protective plate installation.

[0019] Furthermore, multiple limiting blocks arranged in a ring array are fixedly installed on the inner wall of the mounting ring, and a limiting groove matching the limiting block on the same side is opened on the outer side of the pressure relief pipe.

[0020] By adopting the above technical solution, when assembling the installation ring, the workers will put the installation ring on the side wall of the pressure relief pipe. The installation ring is equipped with a limiting block inside. The limiting block and the limiting groove opened in the side wall of the pressure relief pipe will engage to limit and position the installation ring, which will facilitate subsequent fixing.

[0021] In summary, this utility model has the following beneficial technical effects:

[0022] (1) In this utility model, by setting the drive component, the threaded sleeve is driven to rotate by the geared motor, and the screw is driven by the threaded sleeve to push the piston to move inside the pipe, which can play the role of sealing or opening the pressure relief pipe, thus playing the role of pressure relief. No manual adjustment is required, which is conducive to improving the safety of the equipment.

[0023] (2) In this utility model, a groove is opened on the side wall of the screw, and a stabilizing rod is slidably provided in the groove. The top end of the stabilizing rod is fixedly connected to the inner wall of the top end of the box. When the threaded sleeve rotates, the screw will not rotate synchronously with the threaded sleeve under the restriction of the stabilizing rod. Therefore, the screw can be driven to push the piston to move by rotating the threaded sleeve.

[0024] (3) In this utility model, the protective plate above the pressure relief pipe can block the port of the pressure relief pipe, which helps to prevent foreign objects from falling into the pressure relief pipe and helps to maintain the subsequent use effect of the pressure relief pipe. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the fire extinguishing safety pressure relief device of this utility model;

[0026] Figure 2 This utility model is a safety pressure relief device for fire extinguishing. Figure 1 Enlarged view of A in the middle;

[0027] Figure 3 This is a cross-sectional view of the fire extinguishing safety pressure relief device of this utility model;

[0028] Figure 4 This utility model is a safety pressure relief device for fire extinguishing. Figure 3 Enlarged view of B in the middle;

[0029] Figure 5 This utility model is a safety pressure relief device for fire extinguishing. Figure 3 Enlarged view of C;

[0030] Figure 6 This is an exploded view of the drive component in the fire extinguishing safety pressure relief device of this utility model.

[0031] Explanation of the labels in the diagram:

[0032] 1. Pipe; 2. Protective plate; 3. Assembly plate; 4. Connecting plate; 5. Box body; 6. Screw; 7. Pressure relief pipe; 8. Collar; 9. Limiting block; 10. Mounting ring; 11. Insert block; 12. Slot; 13. Support plate; 14. Pressing plate; 15. Retaining ring; 16. Piston; 17. Threaded sleeve; 18. Turbine; 19. Worm rod; 20. Stabilizing rod; 21. Fixing ring; 22. Fixing rod; 23. Gear motor; 24. Drive gear; 25. Driven gear; 26. Spring; 27. Positioning rod; 28. Movable groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0037] Please see Figure 1-6 A fire extinguishing safety pressure relief device includes a pipe 1 and a housing 5 disposed on one side of the pipe 1. A collar 8 is fixedly sleeved on the side wall of the pipe 1 near the housing 5. A connecting plate 4 is fixedly installed between the collar 8 and the housing 5. A detection valve is provided on the side wall of the pipe 1. A pressure relief pipe 7 is connected to the side wall of the pipe 1. A retaining ring 15 is fixedly installed inside the pipe 1. A piston 16 is slidably installed inside the conveying pipe 1. A driving assembly is provided on the side of the piston 16 away from the retaining ring 15. The driving assembly includes a threaded sleeve 17 disposed inside the housing 5. A screw 6 is provided inside the threaded sleeve 17. Through holes are opened on both sides of the housing 5. One end of the screw 6 passes through the pipe 1 and is fixedly connected to the side opposite to the piston 16. The threaded sleeve 17 has two symmetrically distributed fixing rings 21 rotatably mounted on its side wall. Fixing rods 22 are fixedly installed between the two fixing rings 21 and the inner walls on both sides of the box 5. A turbine 18 is fixedly mounted on the side wall of the threaded sleeve 17. A worm gear 19 is rotatably mounted inside the box 5. The worm gear 19 and the turbine 18 mesh. A driven gear 25 is fixedly mounted on the lower side wall of the worm gear 19. A reduction motor 23 is fixedly mounted inside the box 5. A drive gear 24 is fixedly mounted on the side wall of the output shaft of the reduction motor 23. The drive gear 24 and the driven gear 25 mesh. A sliding groove is opened on the side wall of the screw 6. A stabilizing rod 20 is slidably mounted in the sliding groove. The top end of the stabilizing rod 20 is fixedly connected to the inner wall of the top end of the box 5.

[0038] When in use, the device detects the air pressure inside pipe 1 through a detection valve installed on the side wall of pipe 1. When the air pressure inside pipe 1 exceeds a constant value, the geared motor 23 drives the drive gear 24 to rotate, the drive gear 24 drives the driven gear 25 to rotate, the driven gear 25 drives the worm gear 19 to rotate, the worm gear 19 drives the turbine 18 to rotate, and the turbine 18 drives the threaded sleeve 17. The screw 6 is located inside the threaded sleeve 17, and a groove is opened on the side wall of the screw 6. A stabilizing rod 20 is slidably installed in the groove. The top of the stabilizing rod 20 is fixedly connected to the inner wall of the top of the housing 5. When the threaded sleeve 17 rotates, the screw 6 is restrained by the stabilizing rod 20. The piston 16 does not rotate synchronously with the threaded sleeve 17. Therefore, the piston 16 can be moved by the screw 6 driven by the rotation of the threaded sleeve 17. The piston 16 is moved towards the box 5 by the screw 6, and then the lower port of the pressure relief pipe 7 flows out. The gas can be discharged from the pressure relief pipe 7 to achieve the function of pressure relief. No manual adjustment is required, which helps to improve the safety of the equipment. When the gas pressure inside the pipe 1 reaches the required value, the piston 16 moves towards the retaining ring 15 by the screw 6, so that the piston 16 contacts the retaining ring 15, which can play the role of positioning the piston 16, so that the piston 16 can move to the bottom of the pressure relief pipe 7 to achieve the function of sealing the pressure relief pipe 7.

[0039] A rubber ring is fixedly installed on the side of the piston 16 away from the box 5. A groove matching the rubber ring is opened on the side of the retaining ring 15 close to the box 5. The rubber ring on the side of the piston 16 away from the box 5, through the engagement of the rubber ring and the groove opened on the side wall of the retaining ring 15, helps to maintain the tightness of the fit between the piston 16 and the retaining ring 15.

[0040] A mounting ring 10 is fixedly sleeved on the side wall of the pressure relief pipe 7. A protective plate 2 is provided above the pressure relief pipe 7. Two symmetrically distributed assembly plates 3 are fixedly installed at the bottom of the protective plate 2. A positioning component is provided between the two assembly plates 3 and the mounting ring 10. The positioning component includes a plug 11 fixedly installed at the bottom of the two assembly plates 3. A slot 12 matching the plug 11 is opened at the top of the mounting ring 10. Movable grooves 28 are opened on both sides of the inner wall of the two slots 12. A positioning rod 27 is slidably installed in each of the movable grooves 28. A spring 26 is fixedly connected between the opposite ends of the two positioning rods 27 on the same side and the inner wall opposite to the movable groove 28 on the same side. A positioning groove matching the positioning rod 27 on the same side is opened on the side wall of the two plugs 11.

[0041] When installing the protective plate 2, the worker places the insert 11 installed at the bottom of the assembly plate 3 into the slot 12 opened at the top of the mounting ring 10. The engagement of the insert 11 and the slot 12 serves to initially position the protective plate 2. When the insert 11 moves into the slot 12, the insert 11 pushes the positioning rod 27 on the same side to slide into the movable groove 28, and the positioning rod 27 pushes the spring 26 on the same side to retract. After the insert 11 and the slot 12 on the same side are fully engaged, the positioning rod 27 returns to its original position under the elastic force of the spring 26, and the positioning rod 27 engages with the positioning groove opened on the side wall of the insert 11, which serves to position the insert 11 and further fix the protective plate 2. The protective plate 2 can cover the port of the pressure relief pipe 7, which helps to prevent foreign objects from falling into the pressure relief pipe 7 and helps to maintain the subsequent use effect of the pressure relief pipe 7.

[0042] Two symmetrically distributed balance blocks are fixedly installed on the opposite sidewalls of the two positioning rods 27 on the same side. The inner wall of the movable groove 28 is provided with a balance groove that matches the balance block on the same side. When the positioning rod 27 slides in the movable groove 28, the positioning rod 27 slides in the balance groove on the same side along with the balance block on the same side. The cooperation between the balance block and the balance groove helps to prevent the positioning rod 27 from falling out of the movable groove 28.

[0043] Support plates 13 are fixedly installed on both sides of the lower section of the two assembly plates 3. Two sets of symmetrically distributed pressing plates 14 are rotatably installed on the top of the mounting ring 10. The pressing plates 14 in the same set are located on both sides of the slot 12 on the same side. The pressing plates 14 are located above the support plates 13 on the same side. When the assembly plate 3 is attached to the top of the mounting ring 10, the pressing plates 14 are rotated to move above the support plates 13 on the same side. The pressing plates 14 press the positioning support plates 13, which plays the role of positioning and stabilizing the assembly plate 3. This helps to prevent the protective plate 2 from being pushed out by gas during the depressurization process and helps to maintain the stability of the installation of the protective plate 2.

[0044] Multiple limiting blocks 9 arranged in a ring array are fixedly installed on the inner wall of the mounting ring 10. The outer side of the pressure relief pipe 7 is provided with a limiting groove that matches the limiting block 9 on the same side. When assembling the mounting ring 10, the worker puts the mounting ring 10 on the side wall of the pressure relief pipe 7. The mounting ring 10 is provided with a limiting block 9 inside. The limiting block 9 and the limiting groove opened on the side wall of the pressure relief pipe 7 are engaged to limit and position the mounting ring 10, which facilitates subsequent fixing.

[0045] The implementation principle of this utility model embodiment is as follows: When the device is in use, the detection valve set on the side wall of the pipe 1 detects the air pressure inside the pipe 1. When the air pressure inside the pipe 1 exceeds a constant value, the piston 16 can be driven by the drive component to move towards the box 5, thereby causing the piston 16 to disengage from below the pressure relief pipe 7, so that the gas can be discharged through the pressure relief pipe 7, thus achieving the function of pressure relief. When the air pressure inside the pipe 1 reaches the required value, the piston 16 is driven by the drive component to move towards the retaining ring 15, so that the piston 16 contacts the retaining ring 15, thus positioning the piston 16, so that the piston 16 can move to below the pressure relief pipe 7, thereby achieving the function of sealing the pressure relief pipe 7. A protective plate 2 is provided above the pressure relief pipe 7, which serves to cover the port of the pressure relief pipe 7, helping to prevent foreign objects from falling into the pressure relief pipe 7, and helping to maintain the subsequent use effect of the pressure relief pipe 7. An assembly plate 3 is provided at the bottom of the protective plate 2, and a positioning component is provided between the assembly plate 3 and the mounting ring 10, which serves to position and fix the protective plate 2. In this application, all components are assembled using fasteners in the prior art.

[0046] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A safety pressure relief device for fire extinguishing, characterized in that: Includes a pipe (1) and a box (5) disposed on one side of the pipe (1). A collar (8) is fixedly sleeved on the side wall of the pipe (1) near the box (5). A connecting plate (4) is fixedly installed between the collar (8) and the box (5). A detection valve is provided on the side wall of the pipe (1). A pressure relief pipe (7) is connected to the side wall of the pipe (1). A retaining ring (15) is fixedly installed inside the pipe (1). A piston (16) is slidably installed inside the conveying pipe (1). A drive assembly is provided on the side of the piston (16) away from the retaining ring (15). The pressure relief pipe (7) is fixedly fitted with an installation ring (10) on its side wall. A protective plate (2) is provided above the pressure relief pipe (7). Two symmetrically distributed assembly plates (3) are fixedly installed at the bottom of the protective plate (2). A positioning component is provided between the two assembly plates (3) and the installation ring (10).

2. The fire-extinguishing safety pressure relief device according to claim 1, characterized in that: The drive assembly includes a threaded sleeve (17) disposed within a housing (5), a screw (6) disposed within the threaded sleeve (17), through holes on both sides of the housing (5), one end of the screw (6) passing through a pipe (1) and fixedly connected to the side opposite to the piston (16), two symmetrically distributed fixing rings (21) rotatably fitted on the side wall of the threaded sleeve (17), fixing rods (22) fixedly installed between the two fixing rings (21) and the inner walls on both sides of the housing (5), a turbine (18) fixedly fitted on the side wall of the threaded sleeve (17), the housing ( 5) A worm gear (19) is rotatably installed inside the box (5). The worm gear (19) meshes with the turbine (18). A driven gear (25) is fixedly sleeved on the lower side wall of the worm gear (19). A geared motor (23) is fixedly installed inside the box (5). A drive gear (24) is fixedly sleeved on the side wall of the output shaft of the geared motor (23). The drive gear (24) meshes with the driven gear (25). A sliding groove is opened on the side wall of the screw (6). A stabilizing rod (20) is slidably installed in the sliding groove. The top end of the stabilizing rod (20) is fixedly connected to the inner wall of the top end of the box (5).

3. The fire extinguishing safety relief device of claim 1, wherein: A rubber ring is fixedly installed on the side of the piston (16) away from the box (5), and a groove matching the rubber ring is opened on the side of the retaining ring (15) close to the box (5).

4. The fire extinguishing safety relief device of claim 1, wherein: The positioning component includes a plug (11) fixedly installed at the bottom of two assembly plates (3). The top of the mounting ring (10) is provided with a slot (12) that matches the plug (11). The inner walls on both sides of the two slots (12) are provided with movable grooves (28). A positioning rod (27) is slidably installed in each movable groove (28). A spring (26) is fixedly connected between the opposite ends of the two positioning rods (27) on the same side and the inner wall opposite to the movable groove (28) on the same side. The side walls of the two plugs (11) are provided with positioning grooves that match the positioning rods (27) on the same side.

5. The fire-extinguishing safety pressure relief device according to claim 4, characterized in that: Two symmetrically distributed balance blocks are fixedly installed on the opposite sidewalls of the two positioning rods (27) on the same side, and the inner wall of the movable groove (28) is provided with a balance groove that matches the balance block on the same side.

6. The safety relief device for fire extinguishing according to claim 4, characterized in that: Both sides of the lower section of the two assembly plates (3) are fixedly installed with support plates (13). The top of the mounting ring (10) is rotatably installed with two sets of symmetrically distributed pressing plates (14). The pressing plates (14) in the same set are located on both sides of the slot (12) on the same side. The pressing plates (14) are located above the support plates (13) on the same side.

7. The safety relief device for fire extinguishing according to claim 1, characterized in that: The inner wall of the mounting ring (10) is fixedly equipped with a plurality of limiting blocks (9) arranged in a ring array, and the outer side of the pressure relief pipe (7) is provided with a limiting groove that matches the limiting block (9) on the same side.

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