Pneumatic spring type pressure release valve

Abstract

The utility model discloses a pneumatic spring type pressure release valve which comprises a valve body, an adjusting bolt is inserted into the top end of the valve body, the bottom end of the adjusting bolt is connected with the top end of a spring, the bottom end of the spring is connected with a piston, and the piston reciprocates under the telescopic action of the spring. A pressure relief hole is formed in one side of the valve body and is formed in a reciprocating motion interval of the piston; a valve seat is further arranged in the valve body, the valve seat is provided with a hollow inner cavity, a plurality of stabilizing assemblies are fixedly arranged on the outer side wall of the valve seat, each stabilizing assembly comprises two stabilizing blocks which are symmetrically arranged, the stabilizing blocks are connected with the valve body, corresponding through holes are formed in the valve body, and fastening bolts are inserted into the through holes and correspondingly installed with the stabilizing blocks; the two ends of the valve seat are of a symmetrical hourglass-shaped structure, the bottom end of the piston extends into an inner cavity of the valve seat from the top end of the valve seat, the piston extends into the inner cavity of the valve seat to do reciprocating motion, and the problem that a sealing ring of the release valve element is prone to aging when high-temperature steam is released is solved.

Description

Technical Field

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

[0002] Pneumatics uses compressed gas as a power source to drive the machine to complete telescopic or rotational movements. The relief valve is a valve structure that automatically opens and closes according to the pressure of the system. It is generally installed on the pipeline equipment of a closed system to control the pressure inside the pipeline. For example, a relief valve is provided in the Chinese patent with publication number CN103912698A. A load valve core is provided inside the valve body, a sealing gasket is provided between the valve core and the control port, a spring is provided between the damping valve core and the valve cover, and a sealing ring is provided between the load valve core and the control port. However, when high-temperature steam is discharged, the high-temperature steam will cause the sealing ring to age rapidly, affecting the sealing effect. Therefore, a new pneumatic spring-type relief valve has become a problem that technicians in this field urgently need to solve. Utility Model Content

[0003] The present application provides a pneumatic spring-type pressure relief valve, comprising a valve body, an adjusting bolt inserted into the top end of the valve body, the bottom end of the adjusting bolt connected to the top end of a spring, the bottom end of the spring connected to a piston, and the piston reciprocating under the expansion and contraction action of the spring;

[0004] A pressure relief hole is provided on one side of the valve body and is arranged inside the reciprocating motion range of the piston;

[0005] The valve body is further provided with a valve seat having a hollow inner cavity, and the outer side wall of the valve seat is fixedly provided with a plurality of stabilizing components, the stabilizing components including two symmetrically arranged stabilizing blocks connected to the valve body, the valve body is provided with corresponding through holes, the through holes are inserted with fastening bolts and are respectively installed correspondingly to the stabilizing blocks;

[0006] The two ends of the valve seat are symmetrical hourglass-shaped structures. The bottom end of the piston extends from the top end of the valve seat into the inner cavity of the valve seat, and the piston penetrates into the inner cavity of the valve seat to perform reciprocating motion.

[0007] Optionally, the piston includes a plug rod and a ball plug, the plug rod is a cylinder, the ball plug is a hemisphere, the ball plug is fixedly arranged at the bottom end of the plug rod, and the ball plug is adapted to the diameter of the plug rod.

[0008] Optionally, the valve seat includes a first cavity, a second cavity and a third cavity connected in sequence from top to bottom, the second cavity is a cylindrical structure with a hollow interior, and the first cavity and the third cavity are hourglass-shaped structures symmetrical with respect to the second cavity.

[0009] Optionally, the outer side surface of the bottom end of the third cavity is connected to the inner wall of the valve body.

[0010] Optionally, the reciprocating motion area of ​​the ball plunger is arranged on the area of ​​the first cavity and the second cavity.

[0011] Optionally, the bottom end of the valve body is connected to the air outlet of a pressure relief pipe, and the pressure relief pipe is a pipe used for pressure relief in high-pressure pipeline equipment.

[0012] The beneficial effects of the present application are as follows: the valve seat provided in the present application has a first cavity, a second cavity and a third cavity, and the second cavity is a cylindrical structure with a hollow interior, the first cavity and the third cavity are hourglass-shaped structures that are symmetrical relative to the second cavity, and when the position of the ball plug at the bottom of the piston stays inside the second cavity, a sealed state is formed inside the valve seat, and when the position of the ball plug at the bottom of the piston stays inside the first cavity, the gas can be discharged through the gap between the ball plug and the third cavity, and discharged from the system along the pressure relief pipe, the piston directly blocks and dredges the valve seat, and can be used in a high-temperature steam environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the relief valve in the pressure relief state;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the discharge valve in the closed state;

[0015] In the figure: 1. Valve body; 2. Adjusting bolt; 3. Spring; 4. Piston; 5. Pressure relief hole; 6. Valve seat; 7. Stabilizing block; 8. Through hole; 9. Plug rod; 10. Ball plug; 11. First cavity; 12. Second cavity; 13. Third cavity; 14. Pressure relief pipe. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The present application provides a pneumatic spring-type pressure relief valve, comprising a valve body 1, an adjusting bolt 2 inserted into the top end of the valve body 1, the bottom end of the adjusting bolt 2 connected to the top end of a spring 3, the bottom end of the spring 3 connected to a piston 4, and the piston 4 reciprocating under the expansion and contraction action of the spring 3;

[0018] The bottom end of the valve body 1 is connected to the air outlet of a pressure relief pipe 14 , which is a pipe used for pressure relief in high-pressure pipe equipment.

[0019] A pressure relief hole 5 is provided on one side of the valve body 1 and is arranged inside the reciprocating motion range of the piston 4;

[0020] It should be noted that the adjusting bolt 2 is used to adjust the length of the spring 3. When the spring 3 squeezes the piston 4 to move downward, the internal pressure of the relief valve is reduced. When the spring 3 releases the piston 4 upward and adjusts to the adaptive position of the piston 4, the pressure inside the relief valve will be reduced. The pressure inside the relief valve can be controlled by the adjusting bolt 2, and the relief valve performs pressure relief operation according to actual gold demand.

[0021] The valve body 1 is further provided with a valve seat 6 having a hollow inner cavity, and the outer wall of the valve seat 6 is fixedly provided with a plurality of stabilizing components, the stabilizing components including two symmetrically arranged stabilizing blocks 7, the stabilizing blocks 7 being connected to the valve body 1, and corresponding through holes 8 being provided on the valve body 1, and fastening bolts are inserted into the through holes 8 and mounted correspondingly to the stabilizing blocks 7 respectively;

[0022] The valve seat 6 includes a first cavity 11, a second cavity 12 and a third cavity 13 connected in sequence from top to bottom. The second cavity 12 is a cylindrical structure with a hollow interior. The first cavity 11 and the third cavity 13 are hourglass-shaped structures that are symmetrical relative to the second cavity 12.

[0023] The outer side surface of the bottom end of the third cavity 13 is connected to the inner wall of the valve body 1 .

[0024] The piston 4 includes a plug rod 9 and a ball plug 10 . The plug rod 9 is cylindrical, and the ball plug 10 is hemispherical. The ball plug 10 is fixedly arranged at the bottom end of the plug rod 9 , and the diameter of the ball plug 10 is adapted to that of the plug rod 9 .

[0025] The reciprocating motion area of ​​the ball plunger 10 is arranged on the area of ​​the first cavity 11 and the second cavity 12 .

[0026] The two ends of the valve seat 6 are symmetrical hourglass-shaped structures. The bottom end of the piston 4 extends from the top end of the valve seat 6 into the inner cavity of the valve seat 6. The piston 4 penetrates into the inner cavity of the valve seat 6 to perform reciprocating motion.

[0027] Please refer to Figure 1 and Figure 2As shown, when the ball plug 10 is fully inserted into the second cavity 12, the portion of the plug rod 9 connected to the ball plug 10 also begins to extend into the second cavity 12, thereby blocking the gas at the top of the entire valve seat 1. When the steam continues to apply pressure to the interior of the valve seat 1, it pushes the piston 4 upward. At the same time, the spring 3 retracts. When the thrust of the steam is greater than the elastic force of the spring 3, the spring 3 is pushed upward and drives the piston 4 until the ball plug 10 is pushed out of the area of ​​the second cavity 12, allowing the ball plug 10 to reach the position of the first cavity 11. At this time, the piston 4 no longer blocks the top of the valve seat 1, allowing high-temperature steam to enter the interior of the first cavity 11 from the third cavity 12. Finally, the high-temperature steam that has reached the first cavity 11 is discharged from the pressure relief pipe 14.

[0028] The above descriptions are merely a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application discloses the preferred embodiments as above, they are not intended to limit the present application. Any technical personnel familiar with the present profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A pneumatic spring pressure relief valve, comprising a valve body (1), characterized in that: An adjusting bolt (2) is inserted into the top end of the valve body (1), the bottom end of the adjusting bolt (2) is connected to the top end of the spring (3), the bottom end of the spring (3) is connected to the piston (4), and the piston (4) performs reciprocating motion under the expansion and contraction action of the spring (3); A pressure relief hole (5) is provided on one side of the valve body (1) and is arranged inside the reciprocating motion range of the piston (4); The valve body (1) is further provided with a valve seat (6) inside, the valve seat (6) having a hollow inner cavity, and the outer side wall of the valve seat (6) is fixedly provided with a plurality of stabilizing components, the stabilizing components including two symmetrically arranged stabilizing blocks (7), the stabilizing blocks (7) being connected to the valve body (1), the valve body (1) being provided with corresponding through holes (8), the through holes (8) being inserted with fastening bolts and being respectively installed correspondingly to the stabilizing blocks (7); The two ends of the valve seat (6) are symmetrical hourglass-shaped structures, and the bottom end of the piston (4) extends from the top end of the valve seat (6) into the inner cavity of the valve seat (6), and the piston (4) penetrates into the inner cavity of the valve seat (6) to perform reciprocating motion.

2. A pneumatic spring pressure relief valve according to claim 1, characterized in that: The piston (4) comprises a plug rod (9) and a ball plug (10), wherein the plug rod (9) is a cylinder and the ball plug (10) is a hemisphere. The ball plug (10) is fixedly arranged at the bottom end of the plug rod (9), and the diameter of the ball plug (10) is adapted to that of the plug rod (9).

3. The pneumatic spring pressure relief valve according to claim 2, characterized in that: The valve seat (6) comprises a first cavity (11), a second cavity (12) and a third cavity (13) connected in sequence from top to bottom, the second cavity (12) is a cylindrical structure with a hollow interior, and the first cavity (11) and the third cavity (13) are hourglass-shaped structures that are symmetrical relative to the second cavity (12).

4. The pneumatic spring pressure relief valve according to claim 3, characterized in that: The outer side surface at the bottom end of the third cavity (13) is connected to the inner wall of the valve body (1).

5. The pneumatic spring pressure relief valve according to claim 4, characterized in that: The reciprocating motion area of ​​the ball plunger (10) is arranged on the area of ​​the first cavity (11) and the second cavity (12).

6. The pneumatic spring pressure relief valve according to claim 1, characterized in that: The bottom end of the valve body (1) is connected to the air outlet of a pressure relief pipe (14), and the pressure relief pipe (14) is a pipe used for pressure relief in high-pressure pipe equipment.

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