CN210770472U

CN210770472U - High-sealing pressure safety valve

Info

Publication number: CN210770472U
Application number: CN201921661854.9U
Authority: CN
Inventors: 罗立华; 邓梅; 干爱根; 林素梅; 郑子林
Original assignee: Yongyi Valve Group Co ltd
Current assignee: Yongyi Valve Group Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-16
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to a high-sealing pressure safety valve, which comprises a valve body, a valve seat, a valve clack, a guide sleeve, a valve cover, a valve rod, a spring, an adjusting sleeve and a valve cap; the method is characterized in that: the disk seat includes disk seat and last disk seat subassembly down, and lower disk seat fixed mounting includes in the valve body lower part at the valve body lower part in the disk seat subassembly: the upper cushion block is arranged above the lower cushion block and is arranged inside the outer seal seat together, the outer seal seat is fixedly arranged inside the upper end of the lower valve seat, the inner seal seat is fixedly arranged on the upper portion of the upper cushion block, the upper end faces of the inner seal seat and the outer seal seat form a circular arc-shaped valve seat seal surface, a valve seat seal lip is arranged on the inner side of a seal surface of the inner seal seat, the valve seat seal lip extends inwards into a flow channel hole of the upper cushion block, and a spherical seal surface matched with the valve seat seal surface is arranged on the lower end face of the valve clack. The valve seat sealing lip compresses the valve clack sealing surface upwards under the upward thrust of the medium at the inlet side and the self deformation, and the valve seat sealing lip has good sealing performance and accurate setting pressure.

Description

High-sealing pressure safety valve

Technical Field

The utility model belongs to the valve field, in particular to spring relief valve.

Background

The existing spring safety valve has a sealing pair composed of a valve flap sealing surface and a valve seat sealing surface, a sealing specific pressure is generated between the sealing pair for sealing, a setting pressure value of the safety valve is determined by adjusting the precompression of a spring and adjusting the acting force of the spring acting on the sealing pair, the sealing specific pressure of each position of the circumference of the sealing pair is different due to the processing error of the valve flap sealing surface and the valve seat sealing surface, so that the minimum sealing specific pressure of the circumference of the sealing pair is smaller than the setting pressure value, when the working pressure of the inlet side of the safety valve is increased to exceed the sealing pressure and is close to the setting pressure value, the acting force of a medium upwards applied to the valve flap sealing surface is increased, the sealing specific pressure of the sealing pair is reduced, and the valve is easy to leak and is easy.

Disclosure of Invention

Aiming at the technical defects in the prior art, the invention provides the high-sealing pressure safety valve with good sealing performance and accurate setting pressure.

The technical scheme of the utility model includes the valve body, the disk seat, the valve clack, the uide bushing, the valve gap, the valve rod, a spring, the adjusting collar, the valve cap, the valve gap is installed in the valve body top, the uide bushing is arranged in the valve body inner chamber by the valve cap is fixed, the uide bushing is equipped with the stand guide, the valve clack is wholly arranged in the valve body inner chamber, the valve clack upper end is equipped with the guide post with stand guide movable fit, be equipped with vertical blind hole in the stand guide, the blind hole bottom is the back taper structural plane, the spring is vertical to be set up in the valve gap inner chamber, the adjusting collar is installed on valve cap upper portion through the screw thread, the valve rod lower extreme pierces through the spring downwards and stretches into vertical blind hole, valve rod upper end and; the method is characterized in that: the disk seat includes disk seat and last disk seat subassembly down, and lower disk seat fixed mounting includes in the valve body lower part at the valve body lower part in the disk seat subassembly: the upper cushion block is arranged above the lower cushion block and is arranged inside the outer seal seat together, the outer seal seat is fixedly arranged inside the upper end of the lower valve seat, the inner seal seat is fixedly arranged on the upper portion of the upper cushion block, the upper end faces of the inner seal seat and the outer seal seat form a circular arc-shaped valve seat seal surface, a valve seat seal lip is arranged on the inner side of a seal surface of the inner seal seat, the valve seat seal lip extends inwards into a flow channel hole of the upper cushion block, and a spherical seal surface matched with the valve seat seal surface is arranged on the lower end face of the valve clack.

Further, the inner seal seat material is fluoroplastic.

Furthermore, the arc radius value of the valve seat sealing surface is larger than that of the valve clack sealing surface.

The utility model has the advantages that: due to the arrangement of the upper valve seat assembly, when the pressure of a medium at the inlet side is higher than the required sealing pressure, the valve can keep good sealing performance, and the valve has the advantage of good sealing performance; the arrangement of the spherical surface at the lower end of the valve rod enables the downward force of the spring to uniformly act on the sealing surface of the valve clack, and the valve clack can be automatically positioned at the central position in the opening and closing processes of the valve clack, so that the valve clack has the advantage of accurate pressure setting; the valve seat sealing lip is arranged, so that the medium pressure has a self-sealing function before reaching the set pressure, and the sealing property is enhanced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of the upper seat assembly of fig. 1 according to the present invention.

Detailed Description

The high-sealing-pressure safety valve shown in fig. 1 and 2 includes: the valve body 3, the valve seat, the valve clack 4, the uide bushing 5, the valve gap 6, the valve rod 7, the spring 8, the adjusting collar 9, the valve cap 10, the valve gap 6 is installed above the valve body 3, the uide bushing 5 is fixedly arranged in the inner cavity of the valve body 3 by the valve gap 6, the uide bushing 5 is equipped with the stand pipe, the valve clack 4 is wholly arranged in the inner cavity of the valve body 3, the upper end of the valve clack 4 is equipped with the guide post movably matched with the stand pipe, the guide post is equipped with the vertical blind hole, the bottom of the blind hole is the inverted cone structure face, the spring 8 is vertically arranged in the inner cavity of the valve cap 6, the adjusting collar 9 is installed on the upper portion of the valve cap 6 through the screw thread, the valve cap 10 is fixedly installed on the upper portion of the valve cap 6, the lower end of the valve rod 7 penetrates the spring 8 downwards and stretches into the vertical blind hole, the upper end of the spring 8 is pressed against the lower end of the adjusting sleeve 9 through an upper spring seat; the method is characterized in that: the disk seat includes disk seat 1 and last disk seat subassembly down, and 1 fixed mounting of disk seat includes in the 3 lower parts of valve body down, goes up the disk seat subassembly: the sealing structure comprises an upper cushion block 12, a lower cushion block 11, an outer sealing seat 13 and an inner sealing seat 14, wherein the upper cushion block 12 is arranged above the lower cushion block 11 and is arranged inside the outer sealing seat 13 together, the upper cushion block 12 and the lower cushion block 11 can adopt an integrated structure, a sealing ring 2 is arranged between the upper cushion block 12, the lower cushion block 11 and the outer sealing seat 13, the outer sealing seat 13 is fixedly arranged inside the upper end of a lower valve seat 1, the inner sealing seat 14 is fixedly arranged on the upper portion of the upper cushion block 12, the upper end faces of the inner sealing seat 14 and the outer sealing seat 13 form a circular arc-shaped valve seat sealing surface 15, a valve seat sealing lip 16 is arranged on the inner side of the sealing surface of the inner sealing seat 14, the valve seat sealing lip 16 extends inwards into a flow passage hole of the upper cushion block 12, and a spherical. Under the closing state of the valve clack 4, under the action of the elastic force of the spring 8, the sealing surface of the valve clack 4 presses the sealing surface 15 of the valve seat downwards, and meanwhile, the sealing surface of the valve clack 4 is pressed upwards by the sealing lip 16 of the valve seat under the upward thrust of a medium at an inlet side and the deformation of the sealing lip, so that the sealing performance is enhanced, and the sealing pair is prevented from leaking when the medium pressure is smaller than a set pressure value.

The inner sealing seat 14 is made of fluoroplastic, and the deformation of the spring is increased.

The arc radius value of the sealing surface 15 of the valve seat is larger than that of the sealing surface of the valve clack 4, so that the sealing lip 16 of the valve seat can be fully pressed when the valve clack 4 is closed.

Claims

1. A high seal pressure safety valve comprising: the valve body (3), a valve seat, a valve clack (4), a guide sleeve (5), a valve cover (6), a valve rod (7), a spring (8), an adjusting sleeve (9) and a valve cap (10), wherein the valve cover (6) is installed above the valve body (3), the guide sleeve (5) is fixedly arranged in an inner cavity of the valve body (3) by the valve cover (6), the guide sleeve (5) is provided with a guide pipe, the valve clack (4) is integrally arranged in the inner cavity of the valve body (3), the upper end of the valve clack (4) is provided with a guide post in movable fit with the guide pipe, a vertical blind hole is arranged in the guide post, the spring (8) is vertically arranged in the inner cavity of the valve cover (6), the adjusting sleeve (9) is installed on the upper part of the valve cover (6) through threads, the lower end of the valve rod (7) penetrates through the spring (8) downwards and extends into the vertical blind hole, the upper end of the valve rod (7), the upper end of the spring (8) is pressed against the lower end of the adjusting sleeve (9) through an upper spring seat; the method is characterized in that: the disk seat includes disk seat (1) and last disk seat subassembly down, and disk seat (1) fixed mounting includes in valve body (3) lower part down, goes up the disk seat subassembly: go up cushion (12), lower cushion (11), outer seal receptacle (13) and interior seal receptacle (14), go up cushion (12) and set up in cushion (11) top down and arrange outer seal receptacle (13) inside together, outer seal receptacle (13) fixed mounting is inside lower disk seat (1) upper end, interior seal receptacle (14) fixed mounting is on upper portion cushion (12), interior seal receptacle (14) and outer seal receptacle (13) up end form convex disk seat sealing face (15), the sealed face inboard of interior seal receptacle (14) is equipped with disk seat sealing lip (16), this disk seat sealing lip (16) inwards stretches out in the runner hole of last cushion (12), valve clack (4) lower terminal surface is equipped with the spherical sealing face of mutually supporting with disk seat sealing face (15).

2. A high seal pressure safety valve according to claim 1 wherein the inner seal seat (14) material is fluoroplastic.

3. A high seal pressure safety valve according to claim 1 or 2, characterized in that the valve seat sealing surface (15) has a larger arc radius value than the sealing surface of the valve flap (4).