CN206175747U - Diaphragm formula low pressure relief valve - Google Patents
Diaphragm formula low pressure relief valve Download PDFInfo
- Publication number
- CN206175747U CN206175747U CN201621164285.3U CN201621164285U CN206175747U CN 206175747 U CN206175747 U CN 206175747U CN 201621164285 U CN201621164285 U CN 201621164285U CN 206175747 U CN206175747 U CN 206175747U
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- valve
- valve body
- flap
- valve rod
- pressure
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Abstract
The utility model relates to a diaphragm formula low pressure relief valve, including valve body, disk seat, valve clack, valve gap, pressure setting device, its characterized in that: the disk seat adopts perpendicular elbow to form, and disc seal welded is on one side of the valve body outside the horizontal pipeline of perpendicular elbow, and the vertical pipe central line of perpendicular elbow and valve rod central line, the coincidence of inlet channel of the valve body central line have in vertical pipe up end system and seal up the face with the mutual complex of valve clack lower extreme facial features, have the fluid inlet passageway between outer disc of vertical pipe and the valve body inner cavity wall, be equipped with the diaphragm device between valve body and valve gap, the sealed pressure equipment of the outer anchor ring of this diaphragm device is between valve body and valve gap, and diaphragm device center is sealed to be fixed in the valve rod lower part. Have that the pressure differential of opening and close is little, spring control range is big, the adjustable advantage of set pressure. Be applicable to on the pressure vessel or pipeline of low pressure medium operating mode.
Description
Technical field
This utility model belongs to valve field, more particularly, to a kind of relief valve.This utility model is applied to low pressure operating mode
Pressure vessel or pipeline on.
Background technology
Relief valve of the existing use under low pressure operating mode, the main structure using dead weight type safe, dead weight type safety valve are mainly wrapped
The parts such as valve body, valve seat, flap, valve gap are included, its principle is setting the set-pressure of relief valve using the weight of flap itself
Value, when pressure vessel or pipeline internal medium pressure are more than set-pressure value, medium promotes flap to open pressure of releasing.Its shortcoming
It is：When relief valve process finishing, when assembling is completed, its set-pressure cannot be adjusted again, if necessary to adjust set-pressure
Value, then need to re-work design flap size, re-work；The valve, is the effect produced by flap own wt simultaneously
Closing valve, with returning, seat is slow, blowdown of a safety valve is big, poor sealing performance defect for power.
The content of the invention
The purpose of this utility model be for prior art exist shortcoming, there is provided a kind of set-pressure value scalable, return
Seat is fast, blowdown of a safety valve is little, good seal performance diaphragm type low-pressure safety valve.
The technical solution of the utility model includes valve body, valve seat, flap, valve gap, pressure setting device, and valve gap is installed on valve
Above body, pressure setting device is made up of valve rod, spring, adjusting nut, and adjusting nut is installed in valve gap upper end by screw thread
The heart, valve rod upper end pass through adjusting nut centre bore, spring to be installed between the upper spring seat on valve rod and lower spring cup, adjust spiral shell
In the upper surface of upper spring seat, valve rod lower end is connected female lower end top pressure with flap upper surface；It is characterized in that：Valve seat is adopted
Vertical elbow is constituted, and the horizontal pipe periphery sealing welding of vertical elbow is in valve body side, the vertical pipe of vertical elbow
Heart line is overlapped with valve rod centrage, valve body import channel centerline, is formed with vertical pipe upper surface mutual with flap lower surface
The sealing surface of cooperation, has fluid inlet channel between vertical pipe periphery and body cavity wall；Between valve body and valve gap
Diaphragm device is provided with, the cylindrical face seal of the diaphragm device is fitted between valve body and valve gap, and diaphragm device central seal is fixed
In stem lower portion.
Preferably, diaphragm device is made up of with rubber outer ring metal inner ring, and the cylindrical anchor ring of rubber outer ring is fixedly mounted on
Between valve body and valve gap, the inner circle anchor ring of rubber outer ring and metal inner ring are formed and are sealedly and fixedly connected, metal inner ring centrally through
It is screwed installed in stem lower portion, the outside diameter of the metal inner ring is 1.5-3.0 times of flap upper surface outside diameter.
Preferably, manual opener is provided between valve rod upper end and upper capping, the manual opener is by handle, gear
Bar, block composition, handle are arranged in upper capping by rotating shaft, and block is fixedly mounted on valve rod upper end, one end of lever with turn
The end of axle is fixedly connected, and the other end is located at below block.
Preferably, flap lower plane is provided with guiding shin, and cooperate between the guiding shin and valve seat vertical pipe inwall structure
Into vertical guiding mechanism.
Preferably, spherical balls are installed between valve rod lower end and flap.
The utility model has the advantage of：Medium in intake channel is acted on above flap, make flap produce one by
The downward active force that medium additionally increases, so as to the good airproof performance having the advantages that between flap and valve seat, while in flap
Return seat during, the medium in intake channel to flap return seat during have it is complementary, make flap return seat faster,
Have the advantages that blowdown of a safety valve is little；In the presence of diaphragm device, the medium in intake channel is exaggerated active force upwards, has
Increase range of accommodation, optional wide, the adjustable advantage of set-pressure of spring of spring.
Description of the drawings
Fig. 1 is structure cut-away view of the present utility model.
Specific embodiment
Diaphragm type low-pressure safety valve as shown in Figure 1, including valve body 1, valve seat, flap 3, valve gap 5, pressure setting device,
Valve gap 5 is installed on above valve body 1, and pressure setting device is made up of valve rod 7, spring 6, adjusting nut 11, and adjusting nut 11 passes through
Screw thread is installed on 5 upper end center of valve gap, and 7 upper end of valve rod passes through 11 centre bore of adjusting nut, and spring 6 is installed on upper on valve rod 7
Between spring base and lower spring cup, 11 lower end top pressure of adjusting nut is adjusted by adjusting nut 11 in the upper surface of upper spring seat
Position of the section upper spring seat on valve rod 7, adjusts the elastic force of spring 6, realizes the regulation of set-pressure, 7 lower end of valve rod and flap 3
Upper surface is connected；Valve seat is constituted using vertical elbow, and the periphery sealing welding of the horizontal pipe 13 of vertical elbow is in valve body 1
Side, 2 centrage of vertical pipe of vertical elbow are overlapped with 7 centrage of valve rod, 1 intake channel centrage of valve body, in vertical tube
2 upper surface of road is formed with the sealing surface cooperated with 3 lower surface of flap, has between 1 internal chamber wall of 2 periphery of vertical pipe and valve body
There is fluid inlet channel, vertical pipe 2 is arranged right below cone, the cone centrage is overlapped with 1 channel centerline of valve body；
Diaphragm device is provided between valve body 1 and valve gap 5, the cylindrical face seal of diaphragm device is fitted between valve body 1 and valve gap 5,
Diaphragm device central seal is fixed on 7 bottom of valve rod.
Diaphragm device is made up of with rubber outer ring 12 metal inner ring 4, and the cylindrical anchor ring of rubber outer ring 12 is fixedly mounted on valve
Between body 1 and valve gap 5, the inner circle anchor ring of rubber outer ring 12 is formed with metal inner ring 4 and is sealedly and fixedly connected, 4 center of metal inner ring
It is threadably secured and is sealingly mounted at 7 bottom of valve rod, the outside diameter of metal inner ring 4 is 3 upper surface outside diameter of flap
1.5-3.0 again, preferably 2.0 times.
Manual opener is provided between 7 upper end of valve rod and upper capping, the manual opener is by handle 10, pin 9, gear
Block 8 is constituted, and handle 10 is arranged in upper capping by rotating shaft, and block 8 is fixedly mounted on 7 upper end of valve rod, one end of lever 9 with turn
The end of axle is fixedly connected, and the other end is located at below block 8, rotates handle 10 and drives lever 9 to rotate, promotes block 8 and valve rod 7
Rise, manually opened flap 3.
3 lower plane of flap is provided with guiding shin, and the composition that cooperates between 2 inwall of the guiding shin and valve seat vertical pipe is vertical
Guiding mechanism.
Spherical balls are installed between 7 lower end of valve rod and flap 3, make flap 3 keep concentric with valve rod 7 when closing.
Claims (6)
1. a kind of diaphragm type low-pressure safety valve, including valve body (1), valve seat, flap (3), valve gap (5), pressure setting device, valve gap
(5) it is installed on above valve body (1), pressure setting device is made up of valve rod (7), spring (6), adjusting nut (11), adjusting nut
(11) valve gap (5) upper end center is installed on by screw thread, valve rod (7) upper end passes through adjusting nut (11) centre bore, spring (6) peace
Loaded between the upper spring seat and lower spring cup on valve rod (7), adjusting nut (11) lower end top pressure is in the upper surface of upper spring seat
Interior, valve rod (7) lower end is connected with flap (3) upper surface；It is characterized in that valve seat is constituted using vertical elbow, the water of vertical elbow
The periphery sealing welding of flat pipeline (13) is in valve body (1) side, vertical pipe (2) centrage and the valve rod (7) of vertical elbow
Centrage, valve body (1) intake channel centrage overlap, and are formed with and flap (3) lower surface phase interworking in vertical pipe (2) upper surface
The sealing surface of conjunction, has fluid inlet channel between vertical pipe (2) periphery and valve body (1) internal chamber wall；In valve body (1) and valve
Diaphragm device is provided between lid (5), the cylindrical face seal of the diaphragm device is fitted between valve body (1) and valve gap (5), diaphragm dress
Put central seal and be fixed on valve rod (7) bottom.
2. diaphragm type low-pressure safety valve according to claim 1, is characterized in that diaphragm device by metal inner ring (4) and rubber
Outer ring (12) constitutes, and the cylindrical anchor ring of rubber outer ring (12) is fixedly mounted between valve body (1) and valve gap (5), rubber outer ring
(12) inner circle anchor ring is formed with metal inner ring (4) and is sealedly and fixedly connected, and metal inner ring (4) is centrally through the sealing peace that is screwed
Valve rod (7) bottom is mounted in, the outside diameter of metal inner ring (4) is 1.5-3.0 times of flap (3) upper surface outside diameter.
3. diaphragm type low-pressure safety valve according to claim 1 and 2, is characterized in that between valve rod (7) upper end and upper capping
Manual opener is provided with, the manual opener is made up of handle (10), pin (9), block (8), handle (10) is by turning
Axle is arranged in upper capping, and block (8) is fixedly mounted on valve rod (7) upper end, and one end of lever (9) is fixed with the end of rotating shaft and connected
Connect, the other end is located at below block (8).
4. diaphragm type low-pressure safety valve according to claim 1 and 2, is characterized in that flap (3) lower plane is provided with guiding shin,
The vertical guiding mechanism of the composition that cooperates between the guiding shin and valve seat vertical pipe (2) inwall.
5. diaphragm type low-pressure safety valve according to claim 1 and 2, is characterized in that between valve rod (7) lower end and flap (3)
Spherical balls are installed.
6. diaphragm type low-pressure safety valve according to claim 3, is characterized in that flap (3) lower plane is provided with guiding shin, should
The vertical guiding mechanism of composition that cooperates is oriented between shin and valve seat vertical pipe (2) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164285.3U CN206175747U (en) | 2016-10-25 | 2016-10-25 | Diaphragm formula low pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164285.3U CN206175747U (en) | 2016-10-25 | 2016-10-25 | Diaphragm formula low pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206175747U true CN206175747U (en) | 2017-05-17 |
Family
ID=58680795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621164285.3U Active CN206175747U (en) | 2016-10-25 | 2016-10-25 | Diaphragm formula low pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206175747U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838597A (en) * | 2019-04-16 | 2019-06-04 | 双泰阀门有限公司 | A kind of anti-back pressure spring Fall lift safety valve |
| CN111520512A (en) * | 2020-04-30 | 2020-08-11 | 张礼维 | Oil gas recovery conveying pressure control valve |
| CN112577732A (en) * | 2020-12-11 | 2021-03-30 | 华能澜沧江水电股份有限公司乌弄龙里底水电厂 | Online detection device and online detection method for safety valve |
| WO2023019979A1 (en) * | 2021-08-16 | 2023-02-23 | 北京航天石化技术装备工程有限公司 | Safety valve for low-temperature and low-pressure working condition |
-
2016
- 2016-10-25 CN CN201621164285.3U patent/CN206175747U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838597A (en) * | 2019-04-16 | 2019-06-04 | 双泰阀门有限公司 | A kind of anti-back pressure spring Fall lift safety valve |
| CN111520512A (en) * | 2020-04-30 | 2020-08-11 | 张礼维 | Oil gas recovery conveying pressure control valve |
| CN112577732A (en) * | 2020-12-11 | 2021-03-30 | 华能澜沧江水电股份有限公司乌弄龙里底水电厂 | Online detection device and online detection method for safety valve |
| WO2023019979A1 (en) * | 2021-08-16 | 2023-02-23 | 北京航天石化技术装备工程有限公司 | Safety valve for low-temperature and low-pressure working condition |
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