Pressure relief spring type safety valve of gas storage tank

Abstract

The utility model discloses a pressure relief spring type safety valve of a gas storage tank, which belongs to the technical field of safety valves and comprises a base, a valve body, a top shell and pressure relief pipes, the valve body is mounted at the top of the base, two sides of the valve body are respectively connected with the pressure relief pipes, and two right-angle bent pipes are respectively arranged on the two pressure relief pipes and positioned at pressure relief ports. Openings of the sides, away from the two pressure relief pipes, of the two right-angle bent pipes are vertically downward, a top shell is arranged at the top of the valve body, the interior of the top shell communicates with the interior of the valve body, a pressure relief cavity is formed, and a pressure relief assembly is installed in the pressure relief cavity. The safety valve has the advantages that the safety valve is installed on the air storage tank, the pressure relief assembly can conduct pressure relief, the pressure relief efficiency can be improved under the action of the two pressure relief pipes, the downward right-angle bent pipes are connected to the pressure relief pipes, a large amount of dust can be effectively prevented from entering the safety valve, and the safety valve can be prevented from being damaged. The safety valve can prevent compressed air from hurting workers when the safety valve relieves pressure, and safety of the safety valve is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a pressure relief spring type safety valve for a gas storage tank. Background Art

[0002] A spring-loaded safety valve relies on the elastic pressure of a spring to lock the valve, valve stem, plunger or other seals. Once the pressure in the pressure vessel becomes abnormal, the high pressure generated will overcome the spring pressure of the safety valve, so the locking device will be pushed open, forming a pressure relief channel to release the high pressure. A spring-loaded safety valve is generally installed in the middle of a multifunctional overhead crane gas storage tank to safely relieve the pressure in the gas storage tank.

[0003] The gas tank pressure relief spring safety valve in the prior art, due to the installation position, when the pressure of the gas tank is higher than the pressure relief pressure of the safety valve, the safety valve spring is pushed up to release the pressure, which may cause harm to the workers when they pass through the gas tank, and because the safety valve is in a high-dust environment, dust can easily enter the safety valve from the pressure relief port. After the safety valve has been used for a period of time, the valve core will be blocked, making it impossible to release pressure normally. At the same time, the utility model patent with announcement number CN208268493U discloses a spring-adjustable pressure relief safety valve, including a valve housing and a valve core, wherein the valve core is installed inside the valve housing, and the valve housing includes a pressure relief chamber at the upper part of the valve housing, an external pressure relief port is opened on the side wall of the valve housing, and an air inlet connected to the pressure relief chamber is provided at the lower part of the valve housing. The valve core includes a valve core body, an internal pressure relief port on the side wall of the valve core body, a spring placed inside the valve core body, a convex pressure piece under the spring, a convex head is provided on the top of the valve core, the convex head is threadedly connected to the valve core, and a hexagonal countersunk hole is provided on the top of the convex head. The valve housing and valve core are made of stainless steel, and their safety needs to be improved. It is also not convenient to eliminate the influence of dust on the safety valve, which affects the long-term use of the safety valve. Utility Model Content

[0004] In order to overcome the problems in the prior art of the spring-type safety valve, when the pressure of the gas tank is higher than the pressure relief pressure of the safety valve, the safety valve spring is lifted up to relieve the pressure, which may cause harm to the workers when they pass through the gas tank. In addition, since the safety valve is in a high-dust environment, dust can easily enter the safety valve from the pressure relief port. After the safety valve has been used for a period of time, the valve core will be blocked, making it impossible to relieve pressure normally. The utility model provides a gas tank pressure relief spring safety valve, including a base, a valve body, a top shell and a pressure relief pipe. The top of the base is equipped with a valve body, and the two sides of the valve body are respectively connected to pressure relief pipes. Two right-angle bends are respectively arranged at the pressure relief port on the two pressure relief pipes, and the openings of the two right-angle bends away from the two pressure relief pipes are both vertically downward. The top of the valve body is provided with a top shell, and the interior of the top shell is connected to the interior of the valve body to form a pressure relief chamber, and a pressure relief assembly is installed in the pressure relief chamber.

[0005] By installing the safety valve on the gas tank, pressure can be released through the pressure relief assembly inside the safety valve. Under the action of the two pressure relief pipes, the pressure relief efficiency can be improved, and the safety pressure relief effect can be further improved. At the same time, the pressure relief pipe is connected to a downward right-angle elbow, which can effectively prevent a large amount of dust from entering the safety valve and avoid compressed air from causing harm to the staff when the safety valve releases pressure, thereby further improving the safety of the safety valve.

[0006] Preferably, the pressure relief assembly includes a movable block, a return spring and a support top plate, the lower surface of the support top plate is connected to the top of the return spring, and the bottom of the return spring is connected to the movable block.

[0007] Preferably, the movable block includes a piston plate and a spring sleeve, a connecting groove is formed inside the spring sleeve, the return spring is connected to the connecting groove, the piston plate is installed at the bottom of the spring sleeve, the outer diameter of the piston plate is the same as the inner diameter of the pressure relief chamber in the valve body and is slidably connected.

[0008] Preferably, when the internal air pressure of the valve body is greater than the pressure relief pressure of the safety valve, the movable block is pushed upward and squeezes the return spring, and the pressure relief chamber is connected to the pressure relief pipe.

[0009] Preferably, a safety warning component is provided on the valve body, and the safety warning component includes an alarm and a pressure sensor. The alarm is provided in a placement chamber formed inside the top shell, and the pressure sensor is installed in the piston plate.

[0010] By installing a pressure sensor in the piston plate of the movable block, the pressure on the piston plate during the pressure relief process can be monitored. When the pressure is abnormal, an alarm can be sounded through the alarm, which is convenient for the staff to deal with it in time, further improving the safety warning function of the safety valve.

[0011] Preferably, the two right-angle elbows are connected to the two pressure relief pipes via two connecting flanges respectively, and the connecting flanges are provided with fastening bolts for connection.

[0012] Preferably, the inner walls of the valve body and the pressure relief pipe are both provided with wear-resistant inner tubes, and the outer walls of the valve body and the pressure relief pipe are respectively provided with reinforced sleeves.

[0013] By setting a wear-resistant inner tube inside the valve body and the pressure relief pipe, the wear resistance and durability of the pipeline can be improved. By setting a reinforced sleeve outside the valve body and the pressure relief pipe, the use strength and pressure-bearing capacity can be improved.

[0014] Preferably, a threaded rod is connected to the top of the supporting top plate, the threaded rod is threadedly connected to the middle part of the fixing plate, and the fixing plate is fixedly installed inside the top shell.

[0015] Preferably, dust-proof filters are respectively provided at the bottom openings of the two right-angle elbows.

[0016] Preferably, a plurality of fixing holes are formed on the base, a connecting pipe communicating with the interior of the valve body is formed in the middle of the lower surface of the base, and an external thread is formed on the outer surface of the connecting pipe.

[0017] The safety valve can be easily installed and fixed on the gas storage tank through the connecting pipe with external threads, and the connection between the safety valve and the gas storage tank can be easily strengthened through the base and the fixing hole.

[0018] Beneficial effects:

[0019] The beneficial effects produced by adopting the technical solution of the utility model are as follows:

[0020] (1) The safety valve is installed on the gas storage tank, and the pressure can be released through the internal pressure relief assembly of the safety valve. Under the action of the two pressure relief pipes, the pressure relief efficiency can be improved, and the safety pressure relief effect can be further improved. At the same time, the right-angle elbow pipe connected downward on the pressure relief pipe can effectively prevent a large amount of dust from entering the interior of the safety valve, and can also avoid the compressed air from causing harm to the staff when the safety valve is released, further improving the safety of the safety valve.

[0021] (2) By installing a pressure sensor in the piston plate of the movable block, the pressure on the piston plate during the pressure relief process can be monitored. When the pressure is abnormal, an alarm can be sounded through the alarm, which is convenient for the staff to deal with it in time, further improving the safety warning function of the safety valve.

[0022] (3) By setting a wear-resistant inner tube inside the valve body and the pressure relief pipe, the wear resistance and durability of the pipeline can be improved. By setting a reinforced sleeve outside the valve body and the pressure relief pipe, the use strength and pressure resistance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model gas storage tank pressure relief spring type safety valve;

[0025] Figure 2 It is a front structural schematic diagram of the utility model gas storage tank pressure relief spring type safety valve;

[0026] Figure 3 It is a schematic diagram of the internal connection structure of the pressure relief spring safety valve of the gas storage tank of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the movable block on the pressure relief spring safety valve of the gas storage tank of the utility model;

[0028] Figure 5 The utility model is a schematic diagram of the internal structure of the upper valve body of the pressure relief spring safety valve of the gas storage tank.

[0029] In the figure: 1. Base; 2. Valve body; 3. Top shell; 4. Pressure relief pipe; 5. Right-angle elbow; 6. Connecting pipe; 7. Fixing hole; 8. Connecting flange; 9. Movable block; 10. Reset spring; 11. Support top plate; 12. Threaded rod; 13. Fixing plate; 14. Storage bin; 15. Alarm; 16. Piston plate; 17. Spring sleeve; 18. Pressure sensor; 19. Reinforced sleeve; 20. Wear-resistant inner tube; 21. Dust filter. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] This embodiment can release pressure through the pressure relief assembly inside the safety valve by installing the safety valve on the gas storage tank. Under the action of two pressure relief pipes, the pressure relief efficiency can be improved, and the safety pressure relief effect can be further improved. At the same time, the pressure relief pipe is connected to a right-angle elbow downward, which can effectively prevent a large amount of dust from entering the safety valve and avoid the compressed air from causing harm to the staff when the safety valve releases pressure, further improving the safety of the safety valve. The specific implementation is as follows:

[0032] like Figures 1 to 5As shown, a pressure relief spring safety valve for a gas storage tank includes a base 1, a valve body 2, a top shell 3 and a pressure relief pipe 4. The valve body 2 is installed on the top of the base 1. The two sides of the valve body 2 are connected to the pressure relief pipes 4 respectively. Two right-angle elbows 5 are respectively arranged at the pressure relief port positions on the two pressure relief pipes 4. The openings of the two right-angle elbows 5 on the side away from the two pressure relief pipes 4 are vertically downward. The top of the valve body 2 is arranged on the top shell 3. The interior of the top shell 3 is connected to the interior of the valve body 2 and a pressure relief cavity is formed. A pressure relief component is installed in the pressure relief cavity. When the safety valve is installed on the gas storage tank, the pressure relief can be released through the pressure relief component inside the safety valve. Under the action of the two pressure relief pipes 4, the pressure relief efficiency can be improved, and the safety pressure relief effect can be further improved. At the same time, the downward right-angle elbow 5 connected to the pressure relief pipe 4 can effectively prevent a large amount of dust from entering the interior of the safety valve, and can also avoid the compressed air from causing harm to the staff when the safety valve is released, further improving the safety of the safety valve.

[0033] The pressure relief assembly includes a movable block 9, a reset spring 10 and a support top plate 11. The lower surface of the support top plate 11 is connected to the top of the reset spring 10, and the bottom of the reset spring 10 is connected to the movable block 9. The movable block 9 is slidably installed in the pressure relief chamber and can extrude the reset spring 10 under high pressure compression. The support top plate 11 provides a fixed platform to facilitate the extrusion of the reset spring 10. Under normal conditions, the bottom of the movable block 9 will be arranged below the connection between the pressure relief pipe 4 and the valve body 2, thereby sealing it.

[0034] The movable block 9 includes a piston plate 16 and a spring sleeve 17. A connecting groove is formed inside the spring sleeve 17, and a reset spring 10 is connected to the connecting groove. The piston plate 16 is installed at the bottom of the spring sleeve 17. The outer diameter of the piston plate 16 is the same as the inner diameter of the pressure relief chamber in the valve body 2 and is slidably connected. As the reset spring 10 is subjected to high-pressure compression, it can move the piston plate 16 upward and move to the top of the connection between the pressure relief pipe 4 and the valve body 2, thereby opening the connection between the pressure relief pipe 4 and the valve body 2.

[0035] When the internal air pressure of the valve body 2 is greater than the pressure relief pressure of the safety valve, the movable block 9 is pushed upward and squeezes the return spring 10 , and the pressure relief chamber is connected to the pressure relief pipe 4 .

[0036] A safety warning component is provided on the valve body 2, and the safety warning component includes an alarm 15 and a pressure sensor 18. The alarm 15 is provided in a placement chamber 14 formed inside the top shell 3, and the pressure sensor 18 is installed in the piston plate 16. The pressure sensor 18 provided in the piston plate 16 of the movable block 9 can monitor the pressure generated on the piston plate 16 during the pressure relief process, and can sound an alarm through the alarm 15 when the pressure is abnormal, so that the staff can handle it in time, further improving the safety warning function of the safety valve. The pressure sensor 18 is electrically connected to the alarm 15, and the detection end of the pressure sensor 18 is provided on the lower surface of the piston plate 16. A battery is also provided in the placement chamber 14, which can supply power to the alarm 15 and the pressure sensor 18.

[0037] The two right-angle elbows 5 are connected to the two pressure relief pipes 4 respectively through two connecting flanges 8 . The connecting flanges 8 are provided with fastening bolts for connection. The connecting flanges 8 facilitate the tight connection between the pressure relief pipe 4 and the right-angle elbow 5 .

[0038] The inner walls of the valve body 2 and the pressure relief pipe 4 are both provided with a wear-resistant inner tube 20, and the outer walls of the valve body 2 and the pressure relief pipe 4 are respectively provided with a reinforcing sleeve 19. The wear-resistant inner tube 20 provided inside the valve body 2 and the pressure relief pipe 4 can improve the wear resistance and durability of the pipeline, and the reinforcing sleeve 19 provided outside the valve body 2 and the pressure relief pipe 4 can improve the use strength and pressure resistance.

[0039] A threaded rod 12 is connected to the top of the support top plate 11, and the threaded rod 12 is threadedly connected to the middle of the fixed plate 13. The fixed plate 13 is fixedly installed inside the top shell 3. Through the threaded connection between the threaded rod 12 and the fixed plate 13, the vertical position of the support top plate 11 can be easily adjusted, thereby facilitating the adjustment of the return spring 10.

[0040] Dust-proof filters 21 are respectively arranged at the bottom openings of the two right-angle bend pipes 5. The dust-proof filters 21 can further improve the ability of the right-angle bend pipe 5 openings to prevent impurities from entering.

[0041] A plurality of fixing holes 7 are formed on the base 1, and a connecting pipe 6 connected to the inside of the valve body 2 is formed in the middle of the lower surface of the base 1, and an external thread is formed on the outer surface of the connecting pipe 6. The connecting pipe 6 with the external thread can facilitate the installation and fixation of the safety valve on the gas storage tank, and the base 1 and the fixing holes 7 can facilitate strengthening the connection between the safety valve and the gas storage tank.

[0042] Working principle: The safety valve is installed on the gas tank, and the pressure can be relieved through the internal pressure relief component of the safety valve. When the internal air pressure of the valve body is greater than the pressure relief pressure of the safety valve, the movable block is pushed up and squeezes the reset spring. The top of the reset spring is limited by the supporting top plate. During the upward movement of the movable block, the pressure relief chamber is connected to the pressure relief pipe, thereby achieving pressure relief. Under the action of the two pressure relief pipes, the pressure relief efficiency can be improved, and the safety pressure relief effect can be further improved. At the same time, the pressure relief pipe is connected to a downward right-angle elbow, which can effectively prevent a large amount of dust from entering the safety valve and avoid the safety Compressed air can cause harm to workers when the valve is releasing pressure, which further improves the safety of the safety valve. The pressure sensor installed in the piston plate of the movable block can monitor the pressure on the piston plate during the pressure relief process, and can sound an alarm through the alarm when the pressure is abnormal, which is convenient for the staff to deal with it in time, further improving the safety warning function of the safety valve. The wear-resistant inner tube installed in the valve body and the pressure relief pipe can improve the wear resistance of the pipeline and improve its durability. The reinforced casing installed outside the valve body and the pressure relief pipe can improve its use strength and pressure-bearing capacity.

[0043] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas tank pressure relief spring safety valve, characterized in that: The invention comprises a base (1), a valve body (2), a top shell (3) and a pressure relief pipe (4), wherein the valve body (2) is installed on the top of the base (1), and the two sides of the valve body (2) are respectively connected to the pressure relief pipes (4), and two right-angle bends (5) are respectively arranged at the pressure relief ports on the two pressure relief pipes (4), and the openings of the two right-angle bends (5) on one side away from the two pressure relief pipes (4) are both vertically downward, and the top shell (3) is arranged on the top of the valve body (2), and the interior of the top shell (3) is connected to the interior of the valve body (2) to form a pressure relief chamber, and a pressure relief component is installed in the pressure relief chamber.

2. A gas tank pressure relief spring safety valve according to claim 1, characterized in that: The pressure relief assembly comprises a movable block (9), a return spring (10) and a support top plate (11); the lower surface of the support top plate (11) is connected to the top of the return spring (10), and the bottom of the return spring (10) is connected to the movable block (9).

3. A gas tank pressure relief spring safety valve according to claim 2, characterized in that: The movable block (9) comprises a piston plate (16) and a spring sleeve (17). A connecting groove is formed inside the spring sleeve (17), and the return spring (10) is connected inside the connecting groove. The piston plate (16) is installed at the bottom of the spring sleeve (17). The outer diameter of the piston plate (16) is the same as the inner diameter of the pressure relief chamber in the valve body (2) and is slidably connected.

4. The gas tank pressure relief spring safety valve according to claim 3, characterized in that: When the internal air pressure of the valve body (2) is greater than the pressure relief pressure of the safety valve, the movable block (9) is pushed upward and squeezes the return spring (10), and the pressure relief chamber is connected to the pressure relief pipe (4).

5. The gas tank pressure relief spring safety valve according to claim 3, characterized in that: The valve body (2) is provided with a safety warning component, the safety warning component comprising an alarm (15) and a pressure sensor (18), the alarm (15) being provided in a placement chamber (14) formed inside the top shell (3), and the pressure sensor (18) being installed in a piston plate (16).

6. The gas tank pressure relief spring safety valve according to claim 1, characterized in that: The two right-angle elbows (5) are respectively connected to the two pressure relief pipes (4) via two connecting flanges (8), and the connecting flanges (8) are provided with fastening bolts for connection.

7. The gas tank pressure relief spring safety valve according to claim 1, characterized in that: The inner walls of the valve body (2) and the pressure relief pipe (4) are both provided with a wear-resistant inner tube (20), and the outer walls of the valve body (2) and the pressure relief pipe (4) are respectively provided on a reinforcing sleeve (19).

8. The gas tank pressure relief spring safety valve according to claim 2, characterized in that: A threaded rod (12) is connected to the top of the supporting top plate (11), and the threaded rod (12) is threadedly connected to the middle of a fixing plate (13), and the fixing plate (13) is fixedly installed inside the top shell (3).

9. The gas tank pressure relief spring safety valve according to claim 1, characterized in that: Dust-proof filter screens (21) are respectively arranged at the bottom openings of the two right-angle elbows (5).

10. The gas tank pressure relief spring safety valve according to claim 1, characterized in that: A plurality of fixing holes (7) are formed on the base (1), a connecting pipe (6) communicating with the interior of the valve body (2) is formed in the middle of the lower surface of the base (1), and an external thread is formed on the outer surface of the connecting pipe (6).

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