CN203809802U - Spring full-lift safety valve - Google Patents
Spring full-lift safety valve Download PDFInfo
- Publication number
- CN203809802U CN203809802U CN201420240195.2U CN201420240195U CN203809802U CN 203809802 U CN203809802 U CN 203809802U CN 201420240195 U CN201420240195 U CN 201420240195U CN 203809802 U CN203809802 U CN 203809802U
- Authority
- CN
- China
- Prior art keywords
- valve
- spring
- valve seat
- hollow screw
- spool
- 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 discloses a spring full-lift safety valve comprising a valve body, a valve seat, a pressure-adjusting hollow screw, a valve stem and a valve spool connected with the lower end of the valve stem. The lower end of the valve body is connected with the valve seat in a threaded manner, a first locking nut is arranged at a screwed position of the valve body and the valve seat, the upper end of the valve body is in threaded connection with the pressure-adjusting hollow screw and a second locking nut is arranged at a screwed position of the valve body and the pressure-adjusting hollow screw, the upper end of the valve stem penetrates from the pressure-adjusting hollow screw, a spring sleeves the valve stem, the upper end of the spring is abutted against the lower end face of the pressure-adjusting hollow screw, the lower end of the spring is abutted against the upper end face of the valve spool, and the lower end of the valve spool is in close fit with a vent hole of the valve seat. The vent hole of the valve seat is a step hole with small end up, the small-diameter end of the step hole is 3/5-3/4 of the large-diameter end of the step hole. The spring full-lift safety valve has the advantages that since the vent hole of the valve seat is the step hole with small end up, air flow is accelerated from the large-diameter end to the small-diameter end so as to form higher impact force to the valve spool, the valve spool is lifted higher, better pressure relief effect is achieved, and air pressure safety in a tank body is guaranteed.
Description
Technical field
The utility model relates to a kind of safety valve, especially designs a kind of spring Fall lift safety valve.
Background technique
Existing a kind of for limiting the too high spring Fall lift safety valve of tank body internal air pressure, comprise the valve body with exhaust port, there is the valve seat in cylindrical air exhaust hole, valve rod and the spool being connected with valve rod lower end, valve body lower end is threaded with valve seat, valve body and the valve seat place of screwing are provided with the first locking nut, the valve body upper end pressure regulation hollow screw that is threaded, valve body and the pressure regulation hollow screw place of screwing are provided with the second locking nut, valve rod upper end passes from pressure regulation hollow screw, on valve rod, be arranged with spring, the lower end surface of spring upper end and pressure regulation hollow screw offsets, the upper-end surface of spring lower end and spool offsets, spool lower end surface and the sealing of valve seat exhaust port, and adjusting need force value after, by set screw by the locking position of valve seat and pressure regulation hollow screw.This spring Fall lift safety valve is simple in structure, and has saved chain wheel, has reduced manufacture difficulty and cost of production; But because the exhaust port of valve seat is cylindrical, in pressure leak process, spool jack-up insufficient height ideal, pressure release effect has much room for improvement.
Model utility content
It is highly higher that technical problem to be solved in the utility model is to provide a kind of spool jack-up, the spring Fall lift safety valve that pressure release is effective.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of spring Fall lift safety valve, comprise valve body, there is the valve seat of exhaust port, valve rod and the spool being connected with valve rod lower end, valve body lower end is threaded with valve seat, valve body and the valve seat place of screwing are provided with the first locking nut, the valve body upper end pressure regulation hollow screw that is threaded, pressure regulation hollow screw and the valve body place of screwing are provided with the second locking nut, valve rod upper end passes from pressure regulation hollow screw, on valve rod, be arranged with spring, the lower end surface of spring upper end and pressure regulation hollow screw offsets, the upper-end surface of spring lower end and spool offsets, spool lower end surface and valve seat exhaust port are sealed and matched, described valve seat exhaust port is up-small and down-big shoulder hole, and the small aperture of described shoulder hole is 3/5 ~ 3/4 of macropore diameter.
Compared with prior art, the exhaust port that the utility model has the advantage of valve seat is made as after up-small and down-big shoulder hole, gas has acceleration in the time flowing to aperture by its macropore, spool is formed to larger impact force, make spool jack-up highly higher, obtain better pressure release effect, ensure the air pressure safety in tank body.
As preferably, described spool is made up of with the sealing gasket contacting with valve seat valve core, and described valve core and valve-stem integrated are manufactured moulding, and described valve core has downward opening circular trough, described sealing gasket is fixed in valve core circular trough, and described sealing gasket is made up of silica gel.The sealing gasket that silica gel is made has good shockproof, Corrosion Protection.
As improvement, described sealing gasket is fixed in valve core circular trough and refers to, described airtight and watertight padding is in valve core circular trough, and described sealing gasket is fixed by crossed countersunk head screw and valve rod.After preventing pressure release, sealing gasket, because clashing into and depart from valve core circular trough with valve seat, causes seal failure.
As improvement, described sealing gasket center is provided with up-small and down-big stepped shaft mounting hole, the head of crossed countersunk head screw is in the macropore of stepped shaft mounting hole, the ailhead of crossed countersunk head screw is connected with threaded stem through after stepped shaft mounting hole, and the macropore diameter of described stepped shaft mounting hole is less than the aperture of exhaust port aperture.
As improvement, between the head of described crossed countersunk head screw and stepped shaft mounting hole end face, be provided with packing ring.
Brief description of the drawings
Fig. 1 is cross-sectional schematic of the present utility model.
Fig. 2 is front view of the present utility model.
Shown in figure: 1, valve body, 2, valve seat, 2.1, aperture, 2.2, macropore, 3, pressure regulation hollow screw, 4, valve rod, 5, valve core, 6, sealing gasket, 7, the first locking nut, 8, the second locking nut, 9, spring, 10, crossed countersunk head screw, 11, packing ring, 12, lock screw, 13, seal wire, 14, lead sealing.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
This preferred embodiment is a kind of spring Fall lift safety valve as depicted in figs. 1 and 2, comprise valve body 1, valve seat 2, pressure regulation hollow screw 3, valve rod 4 and the spool being connected with valve rod 4 lower ends, valve body 1 lower end is threaded with valve seat 2, valve body 1 is provided with the first locking nut 7 with valve seat 2 places of screwing, valve body 1 upper end is threaded with pressure regulation hollow screw 3, valve body 1 is provided with the second locking nut 8 with pressure regulation hollow screw 3 places of screwing, valve rod 4 upper ends pass from pressure regulation hollow screw 3, on valve rod 3, be arranged with spring 9, the lower end surface of spring 9 upper ends and pressure regulation hollow screw 3 offsets, the upper-end surface of spring 9 lower ends and spool offsets, spool lower end surface and valve seat 2 exhaust ports are sealed and matched, valve seat 2 exhaust ports are up-small and down-big shoulder hole, and aperture 2.1 apertures of shoulder hole are 3/5 ~ 3/4 of macropore 2.2 apertures.Preferably aperture 2.1 apertures are the golden section proportion in macropore 2.2 apertures; The taper hole (not shown) of transition can be set between aperture 2.1 and macropore 2.2 in addition.
Wherein, spool is made up of with the sealing gasket 6 contacting with valve seat 2 valve core 5, valve core 5 and the integrally manufactured moulding of valve rod 4, valve core 5 has downward opening circular trough, sealing gasket 6 is made up of silica gel, sealing gasket 6 is fastened in valve core 5 circular troughs, and sealing gasket 6 is fixing with valve rod 4 by crossed countersunk head screw 10.Sealing gasket 6 centers are provided with up-small and down-big stepped shaft mounting hole, the head of crossed countersunk head screw 10 is in the macropore of stepped shaft mounting hole, the ailhead of crossed countersunk head screw 10 is threaded with valve rod 4 through after stepped shaft mounting hole, and the macropore diameter of stepped shaft mounting hole is less than the aperture of exhaust port aperture 2.1.Between the head of crossed countersunk head screw 10 and stepped shaft mounting hole end face, be provided with packing ring 11.
Adjusting after the force value needing, two lock screws 12 that are located on valve body 1 coordinate with the first locking nut 7 or the second locking nut 8 respectively the locking position of valve seat 2 and pressure regulation hollow screw 3 and valve body 1, and seal wire 13 and lead sealing 14 are set after locking between two lock screws 12.
Claims (5)
1. a spring Fall lift safety valve, comprise valve body (1), there is the valve seat (2) of exhaust port, pressure regulation hollow screw (3), valve rod (4) and the spool being connected with valve rod (4) lower end, valve body (1) lower end is threaded with valve seat (2), valve body (1) is provided with the first locking nut (7) with valve seat (2) place of screwing, valve body (1) upper end is threaded with pressure regulation hollow screw (3), valve body (1) is provided with the second locking nut (8) with pressure regulation hollow screw (3) place of screwing, valve rod (4) upper end passes from pressure regulation hollow screw (3), on valve rod (3), be arranged with spring (9), the lower end surface of spring (9) upper end and pressure regulation hollow screw (3) offsets, the upper-end surface of spring (9) lower end and spool offsets, spool lower end surface and valve seat (2) exhaust port is sealed and matched, it is characterized in that: described valve seat (2) exhaust port is up-small and down-big shoulder hole, aperture (2.1) aperture of described shoulder hole is 3/5 ~ 3/4 of macropore (2.2) aperture.
2. spring Fall lift safety valve according to claim 1, it is characterized in that: described spool is made up of with the sealing gasket (6) contacting with valve seat (2) valve core (5), described valve core (5) is valve rod (4) integrative-structure, described valve core (5) has downward opening circular trough, described sealing gasket (6) is fixed in valve core (5) circular trough, and described sealing gasket (6) is made up of silica gel.
3. spring Fall lift safety valve according to claim 2, it is characterized in that: described sealing gasket (6) is fixed in valve core (5) circular trough and refers to, described sealing gasket (6) is fastened in valve core (5) circular trough, and described sealing gasket (6) is fixing by crossed countersunk head screw (10) and valve rod (4).
4. spring Fall lift safety valve according to claim 3, it is characterized in that: described sealing gasket (6) center is provided with up-small and down-big stepped shaft mounting hole, the head of crossed countersunk head screw (10) is in the macropore of stepped shaft mounting hole, the ailhead of crossed countersunk head screw (10) is threaded with valve rod (4) through after stepped shaft mounting hole, and the macropore diameter of described stepped shaft mounting hole is less than the aperture of exhaust port aperture (2.1).
5. spring Fall lift safety valve according to claim 4, is characterized in that: between the head of described crossed countersunk head screw (10) and stepped shaft mounting hole end face, be provided with packing ring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240195.2U CN203809802U (en) | 2014-05-12 | 2014-05-12 | Spring full-lift safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240195.2U CN203809802U (en) | 2014-05-12 | 2014-05-12 | Spring full-lift safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809802U true CN203809802U (en) | 2014-09-03 |
Family
ID=51448552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240195.2U Expired - Fee Related CN203809802U (en) | 2014-05-12 | 2014-05-12 | Spring full-lift safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809802U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065739A (en) * | 2015-08-14 | 2015-11-18 | 吴江金叶织造有限公司 | Air safety valve for cylinder drying machine |
| CN114838147A (en) * | 2021-02-01 | 2022-08-02 | 浙江三花智能控制股份有限公司 | Electric valve |
-
2014
- 2014-05-12 CN CN201420240195.2U patent/CN203809802U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065739A (en) * | 2015-08-14 | 2015-11-18 | 吴江金叶织造有限公司 | Air safety valve for cylinder drying machine |
| CN114838147A (en) * | 2021-02-01 | 2022-08-02 | 浙江三花智能控制股份有限公司 | Electric valve |
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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: 20140903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |