A boiler explosion-proof safety valve device

Abstract

This utility model discloses a boiler explosion-proof safety valve device, including a valve body, an adjusting screw, an adjusting spring, a guide sleeve, a diaphragm, and a valve stem pressure plate. An air pump is fixedly connected to one side of the valve body, and a nitrogen inlet pipe is fixedly connected to one end of the air pump. A support column is fixedly connected to one side of the valve body, one of which is hollow. A guide ring is fixedly connected to the support column, and a connecting pipe is fixedly connected to one side of the upper end of the guide ring. The upper end of the connecting pipe is fixedly connected to the output end of the air pump. A support ring is fixedly connected inside the connecting pipe, and support rods are fixedly connected to the four sides of the bottom end of the support ring. A movable plate is sleeved on the support rod. This utility model forms a check valve structure by setting an air pump, a nitrogen inlet pipe, a connecting pipe, a support ring, support rods, a movable plate, a limit ring, and an air inlet hole on the upper side of the valve body diaphragm. This allows the air pump to intake air into the guide ring and the valve body, thereby forming a damping structure on the upper side of the diaphragm, reducing vibration and impact at the valve core and valve seat, and improving the valve life.

Description

Technical Field

[0001] This utility model relates to the field of boiler safety valve technology, specifically to a boiler explosion-proof safety valve device. Background Technology

[0002] Boiler safety valves are safety components in boiler systems. Their main function is to prevent the pressure inside the boiler from exceeding a specified value, ensuring the safe operation of the boiler. When the pressure inside the boiler exceeds the specified value, the safety valve automatically opens to release steam or gas and reduce the pressure. When the pressure drops to the specified value, the safety valve automatically closes to prevent fuel waste.

[0003] According to Chinese Patent Publication No. CN207406857U, "An Explosion-Proof Safety Valve Device," the device is mainly characterized by the engagement of circular conical teeth on the platform formed between the bottom of the tertiary through-hole and the top of the secondary through-hole with circular toothed bands on the boss. Due to the toothed engagement, the contact area is increased, resulting in better sealing performance and thus improving explosion-proof performance. Furthermore, the sealing gaskets on the contact surfaces of the safety valve body pipe and the through-pipe provide excellent sealing when the safety valve and the residual liquid venting valve are connected, further enhancing the explosion-proof performance of the device.

[0004] In actual use, common boiler explosion-proof safety valves may experience sudden changes in local flow velocity due to their throttling effect, resulting in turbulence and vortex shedding, as well as periodic pressure pulsations. At this time, the fluid disturbance will be directly transmitted to the valve core and cause high-frequency vibration, which will lead to damage to the sealing surface, resulting in sealing failure and boiler steam leakage.

[0005] Therefore, a boiler explosion-proof safety valve device is proposed to solve the problem that fluid disturbances can be transmitted to the valve core, causing high-frequency vibrations and resulting in damage to the contact surface between the valve core and the valve seat. Utility Model Content

[0006] The technical problem to be solved by this utility model is that fluid disturbances can be transmitted to the valve core, causing high-frequency vibrations and resulting in damage to the contact surface between the valve core and the valve seat. Therefore, a boiler explosion-proof safety valve device is proposed.

[0007] The technical solution adopted by this utility model to solve the technical problem is as follows: a boiler explosion-proof safety valve device, including a valve body, an adjusting screw, an adjusting spring, a guide sleeve, a diaphragm, and a valve stem pressure plate. An air pump is fixedly connected to one side of the valve body, and a nitrogen inlet pipe is fixedly connected to one end of the air pump. A support column is fixedly connected to one side of the valve body, one of which is hollow. A guide ring is fixedly connected to the support column, and a connecting pipe is fixedly connected to one side of the upper end of the guide ring. The upper end of the connecting pipe is fixedly connected to the output end of the air pump. A support ring is fixedly connected inside the connecting pipe. Support rods are fixedly connected to the four sides of the bottom end of the support ring. A movable plate is sleeved on the support rod, and a spring body is in contact with the bottom side of the movable plate. The spring body is sleeved on the support rod, and a limit block is fixedly connected to the bottom end of the support rod. A pressure sensor is fixedly connected to the movable plate, and a limit ring is sleeved on the movable plate. The limit ring is fixedly connected to the bottom side of the connecting pipe. An air inlet is opened on one side of the valve body, and the air inlet corresponds to and communicates with one of the support columns.

[0008] As a preferred technical solution of this utility model, an annular gasket is glued to the bottom side of the limiting ring. The annular gasket is in contact with the movable plate. By setting the annular gasket, the sealing between the movable plate and the limiting ring can be increased.

[0009] As a preferred technical solution of this utility model, each of the four mutually distant sides of the movable plate is rotatably embedded with a support ball, and the support ball contacts the inner wall of the connecting tube. By setting the support ball, the stability of the movable plate movement is improved.

[0010] As a preferred technical solution of this utility model, the upper end of the guide sleeve is provided with an arc-shaped groove, which corresponds to the position of the air inlet. By setting the arc-shaped groove, the obstruction of the air inlet by the guide sleeve can be reduced.

[0011] As a preferred technical solution of this utility model, the guide sleeve is provided with uniformly distributed air guide grooves, which are arc-shaped columnar structures. By setting the air guide grooves, air can be easily guided.

[0012] This utility model has the following advantages: by setting an air pump, nitrogen inlet pipe, connecting pipe, support ring, support rod, movable plate, limit ring, air inlet hole and other structures on the upper side of the valve body diaphragm to form a check structure, the air pump can enter the air guide ring and valve body, thereby forming a damping structure on the upper side of the diaphragm, reducing the vibration and impact at the valve core and valve seat, and improving the valve life. Attached Figure Description

[0013] Figure 1 This is a side sectional view of a preferred embodiment of the boiler explosion-proof safety valve device of the present invention.

[0014] Figure 2This is a three-dimensional structural diagram of the guide sleeve of a boiler explosion-proof safety valve device according to a preferred embodiment of the present invention;

[0015] Figure 3 This is an enlarged structural diagram of point A of a boiler explosion-proof safety valve device according to a preferred embodiment of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Adjusting screw; 3. Adjusting spring; 4. Guide sleeve; 5. Diaphragm; 6. Valve stem pressure plate; 7. Air pump; 8. Nitrogen inlet pipe; 9. Support column; 10. Air guide ring; 11. Connecting pipe; 12. Support ring; 13. Support rod; 14. Movable plate; 15. Spring body; 16. Limiting block; 17. Pressure sensor; 18. Limiting ring; 19. Annular gasket; 20. Air inlet; 21. Arc groove; 22. Air guide groove; 23. Support ball. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Please refer to the following: Figure 1-3 The boiler explosion-proof safety valve device shown includes a valve body 1, an adjusting screw 2, an adjusting spring 3, a guide sleeve 4, a diaphragm 5, and a valve stem pressure plate 6. An air pump 7 is fixedly connected to one side of the valve body 1, and a nitrogen inlet pipe 8 is fixedly connected to one end of the air pump 7. The nitrogen inlet pipe 8 is connected to an external nitrogen source. The operation of the air pump 7 generates suction, thereby supplying air to the air guide ring 10 and the valve body 1. A support column 9 is fixedly connected to one side of the valve body 1. One of the support columns 9 is hollow, and an air guide ring 10 is fixedly connected to the support column 9. A connecting pipe 11 is fixedly connected to one side of the upper end of the air guide ring 10. The upper end of the connecting pipe 11 is fixedly connected to the output end of the air pump 7. A support ring 12 is fixedly connected inside the connecting pipe 11. The device also includes a support ring 12, a support rod 13, and a movable plate 14. The spring body 15, the limiting block 16, and the limiting ring 18 form a check structure, which can reduce the wear of the air pump 7 caused by the pressure inside the valve body 1. The four sides of the bottom end of the support ring 12 are fixedly connected to the support rods 13. The movable plate 14 is sleeved on the support rod 13. The bottom side of the movable plate 14 contacts the spring body 15. The spring body 15 is sleeved on the support rod 13. The bottom end of the support rod 13 is fixedly connected to the limiting block 16. The pressure sensor 17 is fixedly connected to the movable plate 14. The pressure sensor 17 is connected to the air pump 7 in series through the wire. The limiting ring 18 is sleeved on the movable plate 14. The limiting ring 18 is fixedly connected to the bottom side of the connecting pipe 11. An air inlet 20 is opened on one side of the valve body 1. The air inlet 20 corresponds to and communicates with one of the support pillars 9.

[0019] The bottom side of the limiting ring 18 is glued with an annular gasket 19, which contacts the movable plate 14. By setting the annular gasket 19, the sealing between the movable plate 14 and the limiting ring 18 is increased.

[0020] Among them, the four sides of the movable plate 14 that are far apart from each other are rotatably embedded with support balls 23. The support balls 23 are in contact with the inner wall of the connecting pipe 11. By setting the support balls 23, the stability of the movement of the movable plate 14 is improved.

[0021] Among them, the upper end of the guide sleeve 4 is provided with an arc-shaped groove 21, which corresponds to the position of the air inlet 20. By setting the arc-shaped groove 21, the obstruction of the air inlet 20 by the guide sleeve 4 can be reduced.

[0022] Among them, the guide sleeve 4 is evenly provided with air guide grooves 22, which are arc-shaped columnar structures. By setting the air guide grooves 22, it is easy to supply air to the upper side of the diaphragm 5.

[0023] Working principle: When the medium inside the boiler explosion-proof safety valve causes the valve stem pressure plate 6 to collide frequently with the valve body 1 base, the pressure sensor 17 monitors the air pressure fluctuation. When the pressure sensor 17 monitors the air pressure fluctuation, it transmits an electrical signal to the air pump 7. Then, the air pump 7 causes the nitrogen inlet pipe 8 to enter the valve. The air supplied by the air pump 7 enters the air guide ring 10 through the check structure, and then enters the space between the valve body 1 inner cavity and the diaphragm 5 through the air inlet hole 20, forming a pneumatic buffer structure. This can reduce the wear between the valve core and the valve plate and extend the service life of the valve body 1.

[0024] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0025] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A boiler explosion-proof safety valve device, comprising a valve body (1), an adjusting screw (2), an adjusting spring (3), a guide sleeve (4), a diaphragm (5), and a valve stem pressure plate (6), characterized in that, A gas pump (7) is fixedly connected to one side of the valve body (1). A nitrogen inlet pipe (8) is fixedly connected to one end of the gas pump (7). A support column (9) is fixedly connected to one side of the valve body (1). One of the support columns (9) is hollow. A gas guide ring (10) is fixedly connected to the support column (9). A connecting pipe (11) is fixedly connected to one side of the upper end of the gas guide ring (10). The upper end of the connecting pipe (11) is fixedly connected to the output end of the gas pump (7). A support ring (12) is fixedly connected inside the connecting pipe (11). Support rods (13) are fixedly connected to all four sides of the bottom end of the support ring (12). A movable plate (14) is sleeved on the support rod (13). A spring body (15) is in contact with the bottom side of the movable plate (14). The spring body (15) is sleeved on the support rod (13). A limit block (16) is fixedly connected to the bottom end of the support rod (13). A pressure sensor (17) is fixedly connected to the movable plate (14). A limit ring (18) is sleeved on the movable plate (14). The limit ring (18) is fixedly connected to the bottom side of the connecting pipe (11). An air inlet (20) is opened on one side of the valve body (1). The air inlet (20) corresponds to and communicates with one of the support pillars (9).

2. The boiler explosion-proof safety valve device as described in claim 1, characterized in that, The bottom side of the limiting ring (18) is glued with an annular gasket (19), which is in contact with the movable plate (14).

3. The boiler explosion-proof safety valve device as described in claim 2, characterized in that, The movable plate (14) has four mutually spaced sides each with a support ball (23) that is rotatably embedded therein. The support ball (23) is in contact with the inner wall of the connecting tube (11).

4. The boiler explosion-proof safety valve device as described in claim 1, characterized in that, The guide sleeve (4) has an arc-shaped groove (21) at its upper end, and the arc-shaped groove (21) corresponds to the position of the air inlet (20).

5. The boiler explosion-proof safety valve device as described in claim 4, characterized in that, The guide sleeve (4) is provided with uniformly spaced air guide grooves (22), which are arc-shaped columnar structures.

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