CN208651723U - Vibration proof pilot operated safety valve - Google Patents
Vibration proof pilot operated safety valve Download PDFInfo
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- CN208651723U CN208651723U CN201821316509.7U CN201821316509U CN208651723U CN 208651723 U CN208651723 U CN 208651723U CN 201821316509 U CN201821316509 U CN 201821316509U CN 208651723 U CN208651723 U CN 208651723U
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- valve
- pilot
- interference
- pressure
- chamber
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Abstract
The utility model relates to a kind of vibration proof pilot operated safety valve, including main valve, pilot valve, main valve includes main valve body, main valve seat, main valve clack, guide sleeve, main valve lid；Pilot valve includes pilot valve body, guide valve seat, pilot valve valve, pilot valve lid and pressure setting device, and pilot valve body is equipped with pressure tappings, pilot port and pressure relief opening, and pressure tappings are connected to by pressure pipe with main valve body intake channel, and pilot port is connected to by connecting pipe with plunger shaft；It is characterized by: being equipped with uuper valve chamber and lower valve chamber in pilot valve body, guide valve seat is arranged between uuper valve chamber and lower valve chamber, and pilot valve valve is located in uuper valve chamber, and pressure tappings and pilot port are connected to lower valve chamber, and anti-interference device is arranged in the lower valve chamber between pressure tappings and pilot port.Under the non-fully open state of pilot valve, main valve clack will not be acted, and avoided work condition environment vibration that main valve clack is caused to open by mistake and opened, there is the set-pressure in the case where vibrating operating condition to stablize, the good advantage of sealing reliability.Suitable for the vibrating conduits such as air compressor machine or the safety valve of containment system.
Description
Technical field
The utility model belongs to valve field, more particularly, to a kind of pilot operated safety valve.The utility model is suitable for
The safety valve of the vibrating conduits such as air compressor machine or containment system.
Background technique
Existing pilot operated safety valve, including main valve and pilot valve, by the open and close of pilot valve come the unlatching of control bound
With closing, the working method of pilot valve mainly uses the direct load formula structure of spring, and the sealing means of pilot valve use simple
The sealing means of metal and metal, the disadvantage is that: when using on the pipeline or container with vibration, pilot valve is easy to let out
Leakage causes the pressure medium decline that main valve piston is intracavitary, and set-pressure stability is poor, causes main valve to leak or open by mistake and opens.
Summary of the invention
For technological deficiency existing in the prior art, the utility model provides one kind in vibration operating condition in use, adjusting
Pressure stability is good, the good vibration proof pilot operated safety valve of sealing reliability.
The technical solution of the utility model includes main valve, pilot valve, and main valve includes main valve body, main valve seat, main valve clack, guiding
It covers, main valve lid, spring is installed in the plunger shaft constituted between main valve clack and guide sleeve, main valve lid；Pilot valve includes pilot valve body, leads
Valve seat, pilot valve valve, pilot valve lid and pressure setting device, pilot valve body are equipped with pressure tappings, pilot port and pressure relief opening, and pressure tappings are logical
It crosses pressure pipe to be connected to main valve body intake channel, pilot port is connected to by connecting pipe with plunger shaft；It is characterized by: in pilot valve body
Equipped with uuper valve chamber and lower valve chamber, guide valve seat is arranged between uuper valve chamber and lower valve chamber, and pilot valve valve is located in uuper valve chamber, on guide valve seat
Rubber seal is set, and pressure tappings and pilot port are connected to lower valve chamber, are arranged in the lower valve chamber between pressure tappings and pilot port
Anti-interference device；The anti-interference device includes anti-interference spool, anti-interference valve seat, and anti-interference valve seat is fixedly mounted in lower valve chamber, outlet
Be connected to pilot port, import have with the mutually matched sealing surface in anti-interference spool upper surface, the external cylindrical surface of anti-interference spool under
The dynamic cooperation of valve chamber inner wall, lower end are connected to pressure tappings, are formed with axial direction between the external cylindrical surface and lower valve cavity wall of anti-interference spool
Diversion trench；Mandril is set between pilot valve valve lower end surface and anti-interference spool upper end, the mandril periphery and guide valve seat inner hole and anti-
It disturbs and is formed respectively with diversion trench between valve seat inner hole.
Preferably, anti-interference spool is installed in lower valve chamber by adjusting set, under adjusting set lower part is fixed on by tightening nut
In valve chamber, which has external screw thread and internal screw thread, the internal screw thread mutual cooperation of external screw thread and lower valve chamber lower end inner wall
The external screw thread of connection, internal screw thread and adjusting set lower part cooperates, and is equipped between adjusting set lower end and tightening nut lower end surface
Locking nut and gasket；Adjusting set top is equipped with vertical blind hole, and blind via bottom is connected to pressure tappings, and anti-interference spool is axially living
It is dynamic to be installed on the blind hole lower part, axial diversion slot, anti-interference valve seat are equipped between anti-interference spool periphery and the blind hole inner wall
Periphery, which is threadably secured, is installed on blind hole top.
Preferably, tray is set between anti-interference spool and blind hole, tray has periphery and an interior circular hole, periphery with it is blind
Clearance fit between the inner wall of hole, anti-interference spool are plugged in the interior circular hole of tray, the radial direction in tray upper surface and anti-interference spool
O-ring seal is set between convex shoulder.
Preferably, pilot valve valve is mounted in uuper valve chamber by positioning sleeve and guide cylinder, and positioning sleeve is fitted in upper valve by pilot valve lid
Intracavitary, guide cylinder is fitted between positioning sleeve lower end surface and guide valve seat upper surface, between pilot valve valve periphery and guide cylinder inner wall
Axial movement cooperates, and is formed with several radial through-hole on guide cylinder circle wall, pilot valve valve lower end surface has and guide valve seat upper surface phase
The sealing surface mutually cooperated, pilot valve valve upper end pass through positioning sleeve centre bore and contact with pressure setting device lower end.
Utility model has the advantages that guide valve seat is equipped with rubber seal, the resistance to shock of pilot valve sealing pair is improved, is led
Valve is equipped with anti-interference device, and under the non-fully open state of pilot valve, main valve clack will not be acted, and work condition environment vibration is avoided to lead to main valve
Valve, which opens by mistake, to be opened, and there is the set-pressure in the case where vibrating operating condition to stablize, the good advantage of sealing reliability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Vibration proof pilot operated safety valve as shown in Figure 1, including main valve, pilot valve, main valve include main valve body 1, main valve seat 2,
Main valve clack 3, guide sleeve 4, main valve lid 7 install spring in the plunger shaft 6 constituted between main valve clack 3 and guide sleeve 4, main valve lid 7
5,3 periphery of main valve clack and 4 inner hole dynamic sealing of guide sleeve cooperate；Pilot valve includes pilot valve body 11, guide valve seat 18, pilot valve valve 22, leads
Valve deck 26 and pressure setting device, pilot valve body 11 are equipped with pressure tappings, pilot port and pressure relief opening 20, and pressure tappings pass through pressure pipe
8 are connected to 1 intake channel of main valve body, between pressure tappings and pressure pipe 8 be arranged filter screen 9, pilot port by connecting pipe 30 with
Plunger shaft 6 be connected to, pressure setting device use spring structure, by pre-compressed spring 25, adjusting screw rod 28, upper spring seat 27, under
Spring base 24 forms, and pre-compressed spring 25 is mounted between upper spring seat 27 and lower spring cup 24, and adjusting screw rod 28 is installed by screw thread
In the adjusting screw hole of pilot valve lid 26, lower end presses against 27 upper surface center of upper spring seat, and outside is equipped with dust cap 29, lower bullet
24 lower end surface center of spring abutment is contacted with 22 upper end of pilot valve valve；It is characterized by: being equipped with uuper valve chamber and lower valve chamber in pilot valve body 11, lead
Valve seat 18 is arranged between uuper valve chamber and lower valve chamber, and pilot valve valve 22 is located in uuper valve chamber, and rubber seal is arranged on guide valve seat 18
19, using the elasticity of rubber seal 19, sealing performance when keeping vibration between pilot valve valve 22 and rubber seal 19, pressure
Mouth and pilot port are connected to lower valve chamber, and anti-interference device is arranged in the lower valve chamber between pressure tappings and pilot port；The anti-interference dress
It sets including anti-interference spool 14, anti-interference valve seat 16, anti-interference valve seat 16 is fixedly mounted in lower valve chamber, and outlet is connected to pilot port,
Import have with the mutually matched sealing surface in 14 upper surface of anti-interference spool, anti-interference valve seat 16 outlet anti-interference spool 14 between uses
Mutually matched conical seal surface or ball face sealing face, the external cylindrical surface and lower valve cavity wall clearance fit of anti-interference spool 14, under
End is connected to pressure tappings, and axial diversion slot is formed between the external cylindrical surface and lower valve cavity wall of anti-interference spool 14, increases anti-interference
Medium flow field flux between 14 external cylindrical surface of spool and lower valve cavity wall；22 lower end surface of pilot valve valve and 14 upper end of anti-interference spool it
Between mandril 17 is set, be formed respectively with diversion trench between 16 inner hole of 17 periphery of mandril and 18 inner hole of guide valve seat and anti-interference valve seat,
Guarantee the flow of media performance between 17 periphery of mandril and 16 inner hole of 18 inner hole of guide valve seat and anti-interference valve seat.
Anti-interference spool 14 is installed in lower valve chamber by adjusting set 12, under 12 lower part of adjusting set is fixed on by tightening nut 10
In valve chamber, which has external screw thread and internal screw thread, the internal screw thread phase interworking of external screw thread and lower valve chamber lower end inner wall
Close connection, the external screw thread mutual cooperation of internal screw thread and 12 lower part of adjusting set, in 12 lower end of adjusting set and 10 lower end surface of tightening nut
Between be equipped with locking nut and gasket；12 top of adjusting set is equipped with vertical blind hole, and blind via bottom is connected to pressure tappings, anti-interference
Spool 14 is axial to be movably installed in the blind hole lower part, matches between 14 periphery of anti-interference spool and the blind hole inner wall equipped with gap
It closes, 16 periphery of anti-interference valve seat, which is threadably secured, is installed on blind hole top, between 12 periphery of adjusting set and lower valve cavity wall
Equipped with sealing ring.By adjusting the relative position in adjusting set 12 and tightening nut 10, adjusting 14 sealing surface of anti-interference spool and resisting
The distance between 16 sealing surface of valve seat is disturbed, resistance to shock is adjusted.
Between anti-interference spool 14 and blind hole be arranged tray 13, tray 13 have periphery and interior circular hole, periphery with it is blind
Clearance fit between the inner wall of hole, anti-interference spool 14 are plugged in the interior circular hole of tray 13, in 13 upper surface of tray and anti-interference spool
O-ring seal 15 is set between 14 radial convex shoulder.
Pilot valve valve 22 is mounted in uuper valve chamber by positioning sleeve 23 and guide cylinder 21, and positioning sleeve 23 is fitted in by pilot valve lid 26
In valve chamber, guide cylinder 21 is fitted between 18 upper surface of 23 lower end surface of positioning sleeve and guide valve seat, 22 periphery of pilot valve valve and guiding
Cooperation is moved axially between 21 inner walls of cylinder, is formed with several radial through-hole, medium when pilot valve valve 22 is opened on the circle wall of guide cylinder 21
Pressure relief opening 20 is flowed to from radial through-hole, 22 upper end of pilot valve valve passes through the lower bullet of 23 centre bore of positioning sleeve and pressure setting device lower end
Spring abutment 24 contacts.
When 1 import pressure medium of main valve body is in normal pressure value, anti-interference spool 14 leaves anti-interference by the pressure of mandril 17
16 sealing surface of valve seat, main valve inlet side medium by pressure pipe 8, the gap of 14 radial outside of anti-interference spool, anti-interference valve seat 16 with
Radial clearance between mandril 17, connecting pipe 30 enter in plunger shaft 6, medium of the main valve clack in main piston chamber 6 and spring 5 to
Under lower active force, 3 sealing surface compact main valve seat of main valve clack, 2 sealing surface is in close state.
When 1 inlet side pressure medium of main valve body reaches presetting set-pressure value, pilot valve valve 22 is opened, plunger shaft 6
Interior medium is discharged by the radial clearance between connecting pipe 30, guide valve seat 18 and mandril 17 from pressure relief opening 20.While tray 13,
It is close to be move upwardly until that anti-interference spool 14 is formed with anti-interference valve seat 16 under the promotion of pilot valve inlet side medium for anti-interference spool 14
Envelope, the medium of pilot valve inlet side cannot be introduced into plunger shaft 6, when the pressure medium decline in plunger shaft 6, until in plunger shaft 6
Medium and spring 5 act on the downward power of main valve clack 3 less than the active force upward by main valve inlet side medium of main valve clack 3
When, main valve clack 3 upwardly opens, main valve discharge.Pilot valve valve 22 is gradually reduced by the upward active force of lower dielectric at this time, pilot valve
Under active force of the valve 22 by pre-compressed spring 25, close downwards.Meanwhile mandril 17 pushes anti-interference spool 14 to move down disengaging anti-interference valve
16 sealing surfaces of seat, the medium of pilot valve inlet side reenter plunger shaft 6.When the medium of main valve inlet side drops to presetting return
When seat pressure, pilot valve valve 22 is formed with guide valve seat 18 again and is sealed, as Jie of pressure medium and main valve inlet side in plunger shaft 6
When matter pressure is consistent, the decline of main valve clack 3 simultaneously re-forms sealing with main valve seat 2, and main valve is closed.
Claims (4)
1. a kind of vibration proof pilot operated safety valve, including main valve, pilot valve, main valve includes main valve body (1), main valve seat (2), main valve clack
(3), guide sleeve (4), main valve lid (7), the plunger shaft (6) constituted between main valve clack (3) and guide sleeve (4), main valve lid (7) are interior
It installs spring (5)；Pilot valve includes pilot valve body (11), guide valve seat (18), pilot valve valve (22), pilot valve lid (26) and pressure setting dress
It sets, pilot valve body (11) is equipped with pressure tappings, pilot port and pressure relief opening (20), and pressure tappings pass through pressure pipe (8) and main valve body (1)
Intake channel connection；It is characterized by: being equipped with uuper valve chamber and lower valve chamber in pilot valve body (11), guide valve seat (18) is arranged in uuper valve chamber
Between lower valve chamber, pilot valve valve (22) is located in uuper valve chamber, and rubber seal (19) are arranged on guide valve seat (18), pressure tappings and lead
Pressure mouth is connected to lower valve chamber, and anti-interference device is arranged in the lower valve chamber between pressure tappings and pilot port；The anti-interference device includes
Anti-interference spool (14), anti-interference valve seat (16), anti-interference valve seat (16) are fixedly mounted in lower valve chamber, and outlet is connected to pilot port,
Import have with the mutually matched sealing surface in anti-interference spool (14) upper surface, in the external cylindrical surface and lower valve chamber of anti-interference spool (14)
Wall clearance fit, lower end are connected to pressure tappings；Mandril is set between pilot valve valve (22) lower end surface and anti-interference spool (14) upper end
(17), diversion trench is formed respectively between mandril (17) periphery and guide valve seat (18) inner hole and anti-interference valve seat (16) inner hole.
2. vibration proof pilot operated safety valve according to claim 1, it is characterised in that: anti-interference spool (14) passes through adjusting set
(12) it is installed in lower valve chamber, adjusting set (12) lower part is fixed in lower valve chamber by tightening nut (10), the tightening nut (10)
With external screw thread and internal screw thread, the external screw thread of internal screw thread and adjusting set (12) lower part cooperates；Adjusting set (12) top is set
There is vertical blind hole, blind via bottom is connected to pressure tappings, and anti-interference spool (14) is axially movably installed in the blind hole lower part, anti-interference
Valve seat (16) periphery, which is threadably secured, is installed on blind hole top, is equipped between adjusting set (12) periphery and lower valve cavity wall
Sealing ring.
3. vibration proof pilot operated safety valve according to claim 2, it is characterised in that: between anti-interference spool (14) and blind hole
It is arranged tray (13), tray (13) has periphery and interior circular hole, clearance fit between periphery and blind hole inner wall, anti-interference valve
Core (14) is plugged in the interior circular hole of tray (13).
4. vibration proof pilot operated safety valve according to claim 1 or 2 or 3, it is characterised in that: pilot valve valve (22) is by positioning
Set (23) and guide cylinder (21) are mounted in uuper valve chamber, and positioning sleeve (23) is fitted in uuper valve chamber by pilot valve lid (26), guide cylinder
(21) it is fitted between positioning sleeve (23) lower end surface and guide valve seat (18) upper surface, pilot valve valve (22) periphery and guide cylinder (21)
Cooperation is moved axially between inner wall, is formed with several radial through-hole on guide cylinder (21) circle wall, pilot valve valve (22) upper end passes through fixed
Position set (23) centre bore is contacted with pressure setting device lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821316509.7U CN208651723U (en) | 2018-08-15 | 2018-08-15 | Vibration proof pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821316509.7U CN208651723U (en) | 2018-08-15 | 2018-08-15 | Vibration proof pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208651723U true CN208651723U (en) | 2019-03-26 |
Family
ID=65790100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821316509.7U Active CN208651723U (en) | 2018-08-15 | 2018-08-15 | Vibration proof pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208651723U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431934A (en) * | 2021-07-28 | 2021-09-24 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
-
2018
- 2018-08-15 CN CN201821316509.7U patent/CN208651723U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431934A (en) * | 2021-07-28 | 2021-09-24 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
| CN113431934B (en) * | 2021-07-28 | 2023-01-06 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |