CN217422306U

CN217422306U - Sealing structure of safety valve

Info

Publication number: CN217422306U
Application number: CN202221605320.6U
Authority: CN
Inventors: 李国良; 李海伟; 阮林君
Original assignee: Taizhou Guangyi Stainless Steel Valve Co ltd
Current assignee: Taizhou Guangyi Stainless Steel Valve Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-13
Anticipated expiration: 2032-06-23

Abstract

The utility model belongs to the technical field of the relief valve, a seal structure of relief valve is related to, the relief valve includes disk seat and the valve clack of assembly in the disk seat, the relief valve still includes the valve gap, the coaxial setting of valve gap, disk seat and valve clack, the external diameter of valve gap is greater than the internal diameter of disk seat, the coaxial spliced pole that is provided with in bottom of valve gap, the cover is equipped with annular sealed the pad on the spliced pole, the spliced pole threaded connection and the pressure tight gasket of valve clack upper end and valve gap, the interior cavity of sealed lower terminal surface and the up end sealing connection of disk seat and then sealed disk seat of sealed pad. The utility model provides a seal structure of relief valve has simple structure stably, and the installation is easy, and sealing performance is good, long service life's advantage.

Description

Sealing structure of safety valve

Technical Field

The utility model belongs to the technical field of the relief valve, a seal structure of relief valve is related to.

Background

Safety valves are commonly used in pressure lines and are generally sealed by gaskets in order to prevent leakage from the safety valve. Common mounting structures for gaskets are: the annular sealing gasket is arranged between the end face of the valve clack and the end face of the valve seat and used for sealing a gap between the valve clack and the valve seat. The existing sealing gasket does not have a stable fixed structure before the valve clack and the valve seat are compressed, and is in a movable state.

SUMMERY OF THE UTILITY MODEL

The utility model provides a seal structure of relief valve to prior art's is not enough, has simple structure and stabilizes, and the installation is easy, and sealing performance is good, long service life's advantage.

In order to solve the above technical problem, the purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a seal structure of relief valve, the relief valve includes disk seat and the valve clack of assembly in the disk seat, the relief valve still includes the valve gap, disk seat and the coaxial setting of valve clack, the external diameter of valve gap is greater than the internal diameter of disk seat, the coaxial spliced pole that is provided with in bottom of valve gap, the cover is equipped with annular sealed the pad on the spliced pole, the spliced pole threaded connection and the pressure tight seal pad of valve clack upper end and valve gap, the interior cavity of sealed interior terminal surface and the up end sealing connection of disk seat and then sealed disk seat of sealed lower terminal surface that fills up.

In the sealing structure of the safety valve, the fixing mode of screwing the valve flap and the valve cover can be replaced by other modes, such as bonding, welding and the like.

In the above sealing structure for a safety valve, an annular lower groove is provided at the bottom of the valve cap, the sealing gasket is installed in the annular lower groove, the annular lower groove is surrounded by the outer edge ring of the valve cap and the connecting column, and further, when the sealing gasket is in an uncompressed state, the lower end surface of the sealing gasket exceeds the lower end surface of the outer edge ring of the valve cap.

In the sealing structure of the safety valve, the upper end of the valve seat is provided with an annular upper groove, the upper end of the valve seat is divided into the valve seat inner ring and the valve seat outer ring by the annular upper groove, and the lower end surface of the sealing gasket is connected with the upper end surface of the valve seat inner ring in a sealing manner.

In the sealing structure of the safety valve, the outer diameter of the valve cover outer edge ring is not larger than the outer diameter of the annular upper groove, the inner diameter of the valve cover outer edge ring is not smaller than the inner diameter of the annular upper groove, and the valve cover outer edge ring can enter the annular upper groove when the valve cover moves downwards. Preferably, the outer diameter of the outer edge ring of the valve cover is equal to the outer diameter of the annular upper groove, and the inner diameter of the outer edge ring of the valve cover is larger than the inner diameter of the annular upper groove.

In the above sealing structure of a safety valve, an upper end surface of the valve seat inner ring is lower than an upper end surface of the valve seat outer ring in a vertical direction.

In the sealing structure of the safety valve, the upper end of the valve clack is in clearance fit with the inner wall of the valve seat, the upper end face of the valve clack is in contact connection with the inner side of the bottom of the sealing gasket, and the inner ring of the valve seat is in contact connection with the outer side of the bottom of the sealing gasket; further, the radial dimension of the contact part of the valve flap and the sealing gasket is not less than one third of the radial dimension of the sealing gasket, and preferably, the radial dimension of the contact part of the valve flap and the sealing gasket is not less than one half of the radial dimension of the sealing gasket.

In the above sealing structure of the safety valve, the sealing gasket is made of teflon, and the valve seat, the valve flap and the valve cover are made of metal. The valve seat, flap and valve cover are preferably made of stainless steel, and preferably copper when required by the particular application, such as in hydrogen energy pipelines.

Compared with the prior art, the utility model, following beneficial effect has:

the utility model provides a seal structure of new relief valve adopts split type valve gap and valve clack, uses valve clack and valve gap earlier and will seal up the pad fixed, and sealed disk seat and valve clack are sealed to the reuse, make like this the sealing pad have more stable structure, are difficult for moving the position when dealing with high-pressure environment, also are difficult for yielding. Therefore, the utility model provides a seal structure has simple structure stably, and the installation is easy, and sealing performance is good, long service life's advantage.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

reference numerals: 1. a valve seat; 11. a valve seat inner ring; 12. a valve seat outer ring; 2. a valve flap; 3. a valve cover; 31. connecting columns; 32. the outer edge ring of the valve cover; 4. and a gasket.

Detailed Description

The invention will be further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-2:

the utility model provides a seal structure of relief valve, the relief valve includes disk seat 1 and the valve clack 2 of assembly in disk seat 1, the relief valve still includes valve gap 3, disk seat 1 and the coaxial setting of valve clack 2, the external diameter of valve gap 3 is greater than disk seat 1's internal diameter, the coaxial spliced pole 31 that is provided with in bottom of valve gap 3, the cover is equipped with annular sealed 4 of filling up on the spliced pole 31, the spliced pole 31 threaded connection and the pressure seal of valve gap 3 in valve gap 2 upper end and valve gap 3 fill up 4, the interior cavity of sealed disk seat 1 of lower terminal surface and disk seat 1's up end sealing connection and then sealed disk seat 4 of filling up 4.

During the equipment, will earlier establish the spliced pole 31 with annular sealed 4 cover on, later with valve clack 2 spiro union to spliced pole 31 to compress tightly sealed 4 simultaneously, make sealed 4, valve clack 2 and valve gap 3 form an integral fixing structure, will form sealed 4, valve clack 2 and the valve gap 3 assembly that integral fixing structure formed in the disk seat 1 again at last.

The fixing mode of the valve flap 2 and the valve cover 3 in a threaded mode can be replaced by other modes, such as bonding, welding and the like.

In order to better install the sealing gasket 4, the bottom of the valve cover 3 is provided with an annular lower groove, the sealing gasket 4 is installed in the annular lower groove, the annular lower groove is surrounded by the valve cover outer edge ring 32 and the connecting column 31, further, when the sealing gasket 4 is in an uncompressed state, the lower end surface of the sealing gasket 4 exceeds the lower end surface of the valve cover outer edge ring 32, and the structure enables the sealing gasket 4 to have larger compression amount so as to obtain better sealing effect.

The upper end of the valve seat 1 is provided with an annular upper groove, the upper end of the valve seat 1 is divided into a valve seat inner ring 11 and a valve seat outer ring 12 by the annular upper groove, and the lower end face of the sealing gasket 4 is connected with the upper end face of the valve seat inner ring 11 in a sealing mode.

Further, the outer diameter of the valve cover outer edge ring 32 is not larger than the outer diameter of the annular upper groove, the inner diameter of the valve cover outer edge ring 32 is not smaller than the inner diameter of the annular upper groove, and the valve cover outer edge ring 32 can enter the annular upper groove when the valve cover 3 moves downwards. Preferably, the outer diameter of the valve cover outer rim 32 is equal to the outer diameter of the annular upper groove, and the inner diameter of the valve cover outer rim 32 is larger than the inner diameter of the annular upper groove. The above structure can protect the gasket 4 better while preventing the gasket 4 from being over-compressed.

The upper end surface of the valve seat inner ring 11 is lower than the upper end surface of the valve seat outer ring 12 in the vertical direction.

The upper end of the valve clack 2 is in clearance fit with the inner wall of the valve seat 1, the upper end surface of the valve clack 2 is in contact connection with the inner side of the bottom of the sealing gasket 4, and the inner ring 11 of the valve seat is in contact connection with the outer side of the bottom of the sealing gasket 4; further, the radial dimension of the contact part of the valve flap 2 and the sealing gasket 4 is not less than one third of the radial dimension of the sealing gasket 4, and preferably, the radial dimension of the contact part of the valve flap 2 and the sealing gasket 4 is not less than one half of the radial dimension of the sealing gasket 4. The structure can lead the valve clack 2 to better compress the sealing gasket 4 and prevent the sealing gasket 4 from deforming in use.

The material of the sealing gasket 4 is polytetrafluoroethylene, and the material of the valve seat 1, the valve clack 2 and the valve cover 3 is metal.

The safety valve has a wide range of applications, and generally, the valve seat 1, the valve flap 2, and the valve cover 3 are preferably made of stainless steel; but when there is a particular need, for example for hydrogen energy pipelines, copper is preferred to avoid spark-induced safety hazards.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a seal structure of relief valve, the relief valve includes disk seat (1) and valve clack (2) of assembly in disk seat (1), its characterized in that, the relief valve still includes valve gap (3), disk seat (1) and the coaxial setting of valve clack (2), the external diameter of valve gap (3) is greater than the internal diameter of disk seat (1), the coaxial spliced pole (31) that is provided with in bottom of valve gap (3), the cover is equipped with annular sealed pad (4) on spliced pole (31), spliced pole (31) threaded connection and the pressure tight of valve clack (2) upper end and valve gap (3) are sealed fill up (4), the interior cavity of the lower terminal surface of sealed pad (4) and the up end sealing connection of disk seat (1) and then sealed disk seat (1).

2. A sealing structure of a safety valve according to claim 1, wherein the valve cover (3) is provided at the bottom with an annular lower groove, the gasket (4) is mounted in the annular lower groove, and the annular lower groove is defined by the valve cover outer edge ring (32) and the connecting column (31).

3. A sealing structure of a safety valve according to claim 2, wherein the upper end of the valve seat (1) is provided with an annular upper groove which divides the upper end of the valve seat (1) into a valve seat inner ring (11) and a valve seat outer ring (12), and the lower end face of the sealing gasket (4) is in sealing connection with the upper end face of the valve seat inner ring (11).

4. A sealing structure of a safety valve according to claim 3, wherein an outer diameter of the valve cover outer rim (32) is not larger than an outer diameter of the annular upper groove, and an inner diameter of the valve cover outer rim (32) is not smaller than an inner diameter of the annular upper groove.

5. A sealing structure of a safety valve according to claim 3, wherein an upper end face of said seat inner ring (11) is lower than an upper end face of said seat outer ring (12) in a vertical direction.

6. A sealing structure of a safety valve according to claim 3, characterized in that the upper end of the valve flap (2) is in clearance fit with the inner wall of the valve seat (1), the upper end surface of the valve flap (2) is in interference connection with the inner bottom side of the gasket (4), the inner ring (11) of the valve seat is in interference connection with the outer bottom side of the gasket (4), and the radial dimension of the contact part of the valve flap (2) and the gasket (4) is not less than one third of the radial dimension of the gasket (4).

7. A sealing structure of a safety valve according to claim 1, characterized in that the material of the sealing gasket (4) is teflon, and the material of the valve seat (1), the valve flap (2) and the valve cover (3) is metal.