CN114033877A - Bellows sealing spring type safety valve - Google Patents
Bellows sealing spring type safety valve Download PDFInfo
- Publication number
- CN114033877A CN114033877A CN202111472601.9A CN202111472601A CN114033877A CN 114033877 A CN114033877 A CN 114033877A CN 202111472601 A CN202111472601 A CN 202111472601A CN 114033877 A CN114033877 A CN 114033877A
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- CN
- China
- Prior art keywords
- valve
- annular flat
- face
- flat gasket
- valve body
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a bellows sealing spring type safety valve, comprising: 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 device has the characteristics of good sealing performance, stable pressure setting value, long service life and the like.
Description
Technical Field
The invention relates to a safety valve, in particular to a bellows-proof sealing safety valve. The invention is suitable for pipeline containers of corrosive, toxic and other dangerous media.
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 screw sleeve 13, the adjusting screw sleeve 13 is arranged on the upper part of the valve body 6 through threads, the lower end of the adjusting screw sleeve 13 compresses the upper spring seat 12, the lower end of the valve rod 11 compresses the back surface 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 screw sleeve 13 to extend into an inner cavity 14 at the upper end of a valve cap 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.
And steel coins 18 are arranged between the lower end face of the valve rod 11 and the back face of the valve clack 4, and the steel balls 18 are arranged in a conical concave hole of the lower end face of the valve rod 11 and a conical concave hole of the back center of the valve clack 4, so that the acting force of the valve rod 11 is ensured to be positioned 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 adjusting threaded sleeve (13) is installed on the upper portion of the valve body (6) through threads, the lower end of the adjusting threaded sleeve (13) compresses the upper spring seat (12), the lower end of the valve rod (11) compresses 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) and extends 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 pad (8) is provided with an arc-shaped guide plate (20) with a vertical guide groove, the arc-shaped guide plate (20) is positioned on the outer side of the corrugated pipe (7), the outer circular face of the lower annular flat pad (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).
3. A bellows seal spring safety valve according to claim 1 or 2, wherein: and 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 arranged 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472601.9A CN114033877A (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472601.9A CN114033877A (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114033877A true CN114033877A (en) | 2022-02-11 |
Family
ID=80140010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111472601.9A Pending CN114033877A (en) | 2021-12-06 | 2021-12-06 | Bellows sealing spring type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114033877A (en) |
-
2021
- 2021-12-06 CN CN202111472601.9A patent/CN114033877A/en active Pending
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