CN216479124U - Bellows sealing spring type safety valve - Google Patents
Bellows sealing spring type safety valve Download PDFInfo
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- CN216479124U CN216479124U CN202123028757.6U CN202123028757U CN216479124U CN 216479124 U CN216479124 U CN 216479124U CN 202123028757 U CN202123028757 U CN 202123028757U CN 216479124 U CN216479124 U CN 216479124U
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- flat gasket
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Abstract
The utility model relates to a bellows sealing spring formula relief valve, include: the valve comprises a valve body, a valve seat, a valve clack, a valve rod, a guide sleeve and a pressure setting device, wherein the pressure setting device is sealed and isolated from an inner cavity of the valve body by a corrugated pipe; the method is characterized in that: the upper end of the corrugated pipe is welded on the inner ring surface of the upper annular flat gasket, and the lower end of the corrugated pipe is welded on the outer side of the upper plane of the lower annular flat gasket; the upper plane of the lower annular flat gasket is arranged on the step at the lower end of the valve rod by a limiting block, and the inner hole of the lower annular flat gasket is in dynamic sealing fit with the outer circular surface of the valve rod; the guide sleeve is installed in the inner cavity of the valve body by adopting threads, the upper end face of the guide sleeve tightly presses and seals the upper annular flat gasket on the inner step of the valve body, the outer circular surface of the valve clack is in movable fit with the inner hole wall of the guide sleeve, and the lower end face of the valve clack is matched with the valve seat to form a sealing pair. The sealing performance is good, the pressure setting value is stable, and the service life is long.
Description
Technical Field
The utility model relates to a relief valve especially relates to a prevent bellows seal relief valve. The utility model is suitable for a pipeline container of dangerous medium such as corrosivity, poison.
Background
On dangerous medium pipeline containers such as corrosive, toxic and harmful, a bellows safety valve is generally adopted to prevent a medium from entering an inner cavity of a valve cover to corrode a spring and influence setting pressure. Traditional small-bore bellows type relief valve, the lower part welding of bellows is in the valve rod lower part, and the upper portion of bellows is fixed on valve body upper portion, and its shortcoming lies in: when the set pressure of the safety valve is adjusted through the adjusting threaded sleeve, the adjusting threaded sleeve is rotated to drive the valve rod to rotate, so that the corrugated pipe is twisted, and the sealing performance and the pressure set value are affected.
Disclosure of Invention
Aiming at the technical defects in the prior art, the invention provides the bellows sealing spring type safety valve which can prevent the bellows from twisting along with the valve rod, has reliable sealing performance and stable pressure setting value and can prevent the bellows from twisting.
The invention is realized by the following technical scheme:
a bellows seal spring safety valve comprising: the pressure setting device consists of a spring, an upper spring seat, a lower spring seat and an adjusting threaded sleeve, the adjusting threaded sleeve is mounted on the upper portion of the valve body through threads, the lower end of the adjusting threaded sleeve tightly presses the upper spring seat, the lower end of the valve rod tightly presses the back face of the valve clack, the upper end of the valve rod sequentially penetrates through the lower spring seat, the spring, the upper spring seat and the adjusting threaded sleeve upwards and extends into a valve cap inner cavity at the upper end of the valve body, and the pressure setting device is sealed and isolated from the valve body inner cavity through a corrugated pipe; the method is characterized in that: the upper end of the corrugated pipe is welded on the inner ring surface of the upper annular flat gasket, and the lower end of the corrugated pipe is welded on the outer side of the upper plane of the lower annular flat gasket; the upper plane of the lower annular flat gasket is arranged on the step at the lower end of the valve rod by a limiting block, and the inner hole of the lower annular flat gasket is in dynamic sealing fit with the outer circular surface of the valve rod; the guide sleeve is installed in the inner cavity of the valve body by adopting threads, the upper end face of the guide sleeve tightly presses and seals the upper annular flat gasket on the inner step of the valve body, the outer circular surface of the valve clack is in movable fit with the inner hole wall of the guide sleeve, and the lower end face of the valve clack is matched with the valve seat to form a sealing pair.
Furthermore, the lower end face of the upper annular flat gasket is provided with an arc-shaped guide plate with a vertical guide groove, the arc-shaped guide plate is positioned on the outer side of the corrugated pipe, the outer circular face of the lower annular flat gasket is fixedly connected with a guide rod, and the end part of the guide rod is in guide fit with the vertical guide groove on the arc-shaped guide plate.
Furthermore, steel coins are arranged between the lower end face of the valve rod and the valve clack.
The invention has the advantages that: the corrugated pipe is connected with the valve rod in a dynamic sealing mode through the lower annular flat gasket, so that the corrugated pipe is prevented from being damaged due to sprain caused by the fact that the valve rod drives the corrugated pipe to rotate when rotating, sealing performance is good, pressure setting value is stable, and service life is long.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: the valve comprises a valve seat 1, an inlet cavity 2, an adjusting ring 3, a valve clack 4, a guide sleeve 5, a valve body 6, a corrugated pipe 7, an annular flat pad 8, a lower spring seat 9, a spring 10, a valve rod 11, an upper spring seat 12, an adjusting screw sleeve 13, a valve cap 14, a limiting block 15, an annular flat pad 16, a sealing ring 17, a steel ball 18, an outlet cavity 19 and a circular arc guide plate 20.
The specific implementation mode is as follows:
as can be seen from fig. 1, a bellows sealing spring type safety valve includes: the pressure setting device comprises a spring 10, an upper spring seat 12, a lower spring seat 9 and an adjusting threaded sleeve 13, the adjusting threaded sleeve 13 is arranged on the upper portion of the valve body 6 through threads, the lower end of the adjusting threaded sleeve 13 presses the upper spring seat 12, the lower end of the valve rod 11 presses the back face of the valve clack 4, the upper end of the valve rod 11 sequentially penetrates through the lower spring seat 9, the spring 10, the upper spring seat 12 and the adjusting threaded sleeve 13 upwards and extends into an inner cavity of a valve cap 14 at the upper end of the valve body 6, the pressure setting device is sealed and isolated from an outlet cavity 19 of the valve body 6 through the corrugated pipe 7, and a medium is prevented from entering an installation cavity of the pressure setting device to corrode the spring 10 and influence a pressure setting value; the method is characterized in that: the upper end of the corrugated pipe 7 is welded on the inner ring surface of the upper annular flat gasket 8, and the lower end is welded on the outer side of the upper plane of the lower annular flat gasket 16; the upper plane of the lower annular flat gasket 16 is arranged on the lower end step of the valve rod 11 by a limiting block 15, the inner hole of the lower annular flat gasket is in dynamic sealing fit with the outer circular surface of the valve rod 11, a sealing ring 17 is arranged in the inner hole of the lower annular flat gasket 16, and the sealing ring 17 and the outer circular surface of the valve rod 11 form soft sealing dynamic fit, so that the lower annular flat gasket 16 can rotate relative to the valve rod 11; the guide sleeve 5 is installed in the inner cavity of the valve body 6 by adopting threads, the upper end face of the guide sleeve compresses the upper annular flat gasket 8 to be installed on the inner step of the valve body 6 in a sealing mode, the pressure setting device is isolated from the outlet cavity 19 of the valve body 6 in a sealing mode, the outer circular face of the valve clack 4 is in movable fit with the inner hole wall of the guide sleeve 5, the valve clack 4 can move up and down in the guide sleeve 5, and the lower end face of the valve clack is matched with the valve seat 1 to form a sealing pair.
The lower end face of the upper annular flat gasket 8 is provided with an arc-shaped guide plate 20 with a vertical guide groove, the arc-shaped guide plate 20 is positioned outside the corrugated pipe 7, the outer circular face of the lower annular flat gasket 16 is fixedly connected with a guide rod, and the end part of the guide rod is in guide fit with the vertical guide groove on the arc-shaped guide plate 20 to prevent the lower annular flat gasket 16 from rotating along with the valve rod 11.
A steel coin 18 is arranged between the lower end face of the valve rod 11 and the back face of the valve clack 4, and the steel ball 18 is installed in a conical concave hole in the lower end face of the valve rod 11 and a conical concave hole in the center of the back face of the valve clack 4, so that the acting force of the valve rod 11 is guaranteed to be located in the center of the valve clack 4.
Claims (3)
1. A bellows seal spring safety valve comprising: the pressure setting device comprises a valve body (6), a valve seat (1), a valve clack (4), a valve rod (11), a guide sleeve (5) and a pressure setting device, wherein the pressure setting device consists of a spring (10), an upper spring seat (12), a lower spring seat (9) and an adjusting threaded sleeve (13), the lower end of the valve rod (11) tightly presses the back face of the valve clack (4), the upper end of the valve rod (11) upwards sequentially penetrates through the lower spring seat (9), the spring (10), the upper spring seat (12) and the adjusting threaded sleeve (13) to extend into an inner cavity of a valve cap (14) at the upper end of the valve body (6), and the pressure setting device is sealed and isolated from an outlet cavity (19) of the valve body (6) through a corrugated pipe (7); the method is characterized in that: the upper end of the corrugated pipe (7) is welded on the inner ring surface of the upper annular flat gasket (8), and the lower end is welded on the outer side of the upper plane of the lower annular flat gasket (16); the upper plane of the lower annular flat gasket (16) is arranged on the step at the lower end of the valve rod (11) by a limiting block (15), and the inner hole of the lower annular flat gasket is in dynamic sealing fit with the outer circular surface of the valve rod (11); the guide sleeve (5) is installed in the inner cavity of the valve body (6) by adopting threads, the upper end face of the guide sleeve compresses the upper annular flat gasket (8) to be installed on the inner step of the valve body (6) in a sealing mode, the outer circular face of the valve clack (4) is in movable fit with the inner hole wall of the guide sleeve (5), and the lower end face of the valve clack is matched with the valve seat (1) to form a sealing pair.
2. The bellows seal spring safety valve of claim 1, wherein: the lower end face of the upper annular flat gasket (8) is provided with a circular arc guide plate (20) with a vertical guide groove, the circular arc guide plate (20) is positioned on the outer side of the corrugated pipe (7), the outer circular face of the lower annular flat gasket (16) is fixedly connected with a guide rod, and the end part of the guide rod is in guide fit with the vertical guide groove on the circular arc guide plate (20).
3. A bellows seal spring safety valve according to claim 1 or 2, wherein: and a steel ball (18) is arranged between the lower end surface of the valve rod (11) and the back surface of the valve clack (4), and the steel ball (18) is arranged in a conical concave hole on the lower end surface of the valve rod (11) and a conical concave hole in the center of the back surface of the valve clack (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028757.6U CN216479124U (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028757.6U CN216479124U (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216479124U true CN216479124U (en) | 2022-05-10 |
Family
ID=81419889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123028757.6U Active CN216479124U (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216479124U (en) |
-
2021
- 2021-12-06 CN CN202123028757.6U patent/CN216479124U/en active Active
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