CN203770771U - Positive-negative pressure safety valve - Google Patents
Positive-negative pressure safety valve Download PDFInfo
- Publication number
- CN203770771U CN203770771U CN201420179005.0U CN201420179005U CN203770771U CN 203770771 U CN203770771 U CN 203770771U CN 201420179005 U CN201420179005 U CN 201420179005U CN 203770771 U CN203770771 U CN 203770771U
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- CN
- China
- Prior art keywords
- valve
- negative pressure
- flap
- seat
- pressure
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a positive-negative pressure safety valve which comprises a valve body, a valve seat, valve clacks and a pressure setting device. The valve seat is arranged in an inlet channel of the valve body, the valve clacks are arranged in an outlet of the valve seat, the pressure setting device is composed of setting springs, a spring gland and an adjusting screw, the setting springs are arranged between the spring gland and the back faces of the valve clacks, a negative pressure relief hole is mainly formed in the center of the plane where a valve clack sealing face is located, an auxiliary valve seat is arranged on the lower end faces of the valve clacks close to the circumference of the negative pressure relief hole, an auxiliary valve clack is arranged on the inlet side of the auxiliary valve seat, the auxiliary valve clack is fixedly arranged at the lower end of the valve rod, a spring seat is arranged at the upper end of the valve rod, and negative pressure setting springs are arranged between the spring seat and the back faces of the valve clacks. When pressure in a pressure container exceeds the set pressure, the valve clacks are opened to release the pressure. When negative pressure in the pressure container exceeds the elastic force of the negative pressure setting springs, the auxiliary valve clack is opened to suck air in the outlet of the valve body in the pressure container, and the positive-negative pressure protection function is achieved. The positive-negative pressure safety valve is suitable for the pressure container prone to generating negative pressure.
Description
Technical field
The utility model relates to valve field, particularly about a kind of safety valve.The utility model is applicable to easily produce on the pressurized container of negative pressure.
Background technique
Safety valve is to be installed on the valve of protecting pressure vessel safety on pressurized container; the structure of safety valve generally comprises valve body, valve seat, flap, pressure setting mechanism; valve body inlet passage is communicated with pressurized container inner chamber; valve seat is installed in valve body inlet passage; pressure setting mechanism generally adopts setting spring, and setting spring is installed on the flap back side.For malleation safety valve, its flap is installed on valve seat outlet port; For negative pressure relief valve, its flap is installed on valve seat inlet.When vessel internal pressure power surpasses Set pressure, flap is opened relieving pressure, the safety of protection pressurized container.But existing safety valve generally only has malleation or the negative pressure of protection pressurized container, can not carry out positive and negative pressure protection to pressurized container simultaneously.
Summary of the invention
The purpose of this utility model is the shortcoming existing for prior art, and a kind of positive/negative-pressure safety valve of realizing the protection of pressurized container positive and negative pressure is provided.
The technical solution of the utility model comprises valve body, valve seat, flap, pressure setting device, valve seat is installed in valve body inlet passage, flap is installed on valve seat outlet, pressure setting device is by setting spring, spring capping and adjusting screw form, setting spring is installed between spring capping and the flap back side, the planar central that is mainly valve clack sealing surface place is shaped with negative pressure escape orifice, near on the flap lower end surface of negative pressure escape orifice circumference, be shaped with auxiliary-seat, at auxiliary-seat suction side, be provided with secondary flap, this pair flap is fixedly mounted on the lower end of valve rod, valve rod upper end mounting spring seat, between this spring seat and the flap back side, negative pressure setting spring is installed.
In above technological scheme, the body cavity in valve seat outlet port is shaped with piston cylinder, and the flap back side is shaped with and the moving cylndrical surface coordinating of piston cylinder, is shaped with the through hole that is communicated with valve outlet on this cylndrical surface, and spring capping periphery coordinates with piston cylinder motive sealing.
The utility model has the advantages that at flap center negative-pressure protection device is set; when vessel internal pressure power surpasses Set pressure; flap is opened relieving pressure; when in pressurized container, negative pressure surpasses negative pressure setting spring elastic force; secondary flap is opened valve outlet air intake pressurized container, has malleation, negative pressure protective function.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Positive/negative-pressure safety valve as shown in Figure 1, comprise valve body 1, valve seat 2, flap 4, pressure setting device, valve seat 2 is installed in valve body 1 inlet passage, flap 4 is installed on valve seat 2 outlets, pressure setting device is by setting spring 6, spring capping 11 and adjusting screw 12 form, setting spring 6 is installed between spring capping 11 and flap 4 back sides, adjusting screw 12 screw threads are installed in valve gap 13 screws, the planar central at flap 4 sealing surface places is shaped with negative pressure escape orifice 5, near on flap 4 lower end surfaces of negative pressure escape orifice 5 circumference, be shaped with auxiliary-seat, at auxiliary-seat suction side, be provided with secondary flap 3, auxiliary-seat and secondary flap 3 have the sealing surface cooperatively interacting, this pair flap 3 is fixedly mounted on the lower end of valve rod 7, valve rod 7 upper end mounting spring seats 9, between this spring seat 9 and flap 4 back sides, negative pressure setting spring 8 is installed, in spring seat 9 upper-end surfaces, be provided with regulating block 10, this regulating block 10 is installed on valve rod 7 with screw thread, flap 4 back side fixed installation guide holders 14.
Valve body 1 inner chamber in valve seat 2 outlet ports is shaped with piston cylinder, and flap 4 back sides are shaped with and the moving cylndrical surface coordinating of piston cylinder, are shaped with the through hole that is communicated with valve body 1 outlet on this cylndrical surface, and spring capping 11 peripheries coordinate with piston cylinder motive sealing.
Claims (2)
1. a positive/negative-pressure safety valve, comprise valve body (1), valve seat (2), flap (4), pressure setting device, valve seat (2) is installed in valve body (1) inlet passage, flap (4) is installed on valve seat (2) outlet, pressure setting device is by setting spring (6), spring capping (11) and adjusting screw (12) form, setting spring (6) is installed between spring capping (11) and flap (4) back side, the planar central that it is characterized in that flap (4) sealing surface place is shaped with negative pressure escape orifice (5), near on flap (4) lower end surface of negative pressure escape orifice (5) circumference, be shaped with auxiliary-seat, at auxiliary-seat suction side, be provided with secondary flap (3), this pair flap (3) is fixedly mounted on the lower end of valve rod (7), valve rod (7) upper end mounting spring seat (9), between this spring seat (9) and flap (4) back side, negative pressure setting spring (8) is installed.
2. positive/negative-pressure safety valve according to claim 1, it is characterized in that being shaped with piston cylinder at valve body (1) inner chamber in valve seat (2) outlet port, flap (4) back side is shaped with and the moving cylndrical surface coordinating of piston cylinder, on this cylndrical surface, be shaped with the through hole that is communicated with valve body (1) outlet, spring capping (11) periphery coordinates with piston cylinder motive sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179005.0U CN203770771U (en) | 2014-04-03 | 2014-04-03 | Positive-negative pressure safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179005.0U CN203770771U (en) | 2014-04-03 | 2014-04-03 | Positive-negative pressure safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770771U true CN203770771U (en) | 2014-08-13 |
Family
ID=51287962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420179005.0U Expired - Fee Related CN203770771U (en) | 2014-04-03 | 2014-04-03 | Positive-negative pressure safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770771U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269899A (en) * | 2017-08-15 | 2017-10-20 | 泰州市博圣机械配件厂 | A kind of special portable air reducing valve peculiar to vessel |
| CN107448654A (en) * | 2017-09-02 | 2017-12-08 | 泰州市博圣机械配件厂 | A kind of special air reducing valve peculiar to vessel |
-
2014
- 2014-04-03 CN CN201420179005.0U patent/CN203770771U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269899A (en) * | 2017-08-15 | 2017-10-20 | 泰州市博圣机械配件厂 | A kind of special portable air reducing valve peculiar to vessel |
| CN107448654A (en) * | 2017-09-02 | 2017-12-08 | 泰州市博圣机械配件厂 | A kind of special air reducing valve peculiar to vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20150403 |
|
| EXPY | Termination of patent right or utility model |