CN203614833U - Unloading switch - Google Patents
Unloading switch Download PDFInfo
- Publication number
- CN203614833U CN203614833U CN201320685403.5U CN201320685403U CN203614833U CN 203614833 U CN203614833 U CN 203614833U CN 201320685403 U CN201320685403 U CN 201320685403U CN 203614833 U CN203614833 U CN 203614833U
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- Prior art keywords
- alive
- load
- valve
- screw rod
- main valve
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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.)
- Expired - Lifetime
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- 239000011148 porous material Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 11
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
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Abstract
The utility model discloses an unloading switch and relates to the field of mechanical seal. The unloading switch comprises a casing, a screw rod, a mandrel, a main movable valve, an unloading movable valve, a spring and a lock cap. A thread hole is machined in one end of the casing, a main movable valve cavity used for containing the main movable valve is machined in the other end of the casing and is blocked by the lock cap; a U-shaped slot is machined in the threaded end of the screw rod, and one end of the mandrel is positioned in the U-shaped slot and connected with the screw rod in a clamping manner; the sealed end of the unloading movable valve is provided with a conical surface; an inflation hole and an exhaust hole are machined in the side wall of the casing, and the inflation hole, the exhaust hole and the main movable valve cavity are communicated with one another in sequence; an unloading movable valve cavity used for containing the unloading movable valve is machined in the main movable valve, the inner surface of the sealed end of the main movable valve and the conical surface of the unloading movable valve are sealed in a pressing manner, and the outer surface of the sealed end of the main movable valve and the inner surface of the casing are sealed in a pressing manner. The unloading switch can meet the use requirements under large pressure span, so as to improve the stability and prolong service life of related products in the aerospace field.
Description
Technical field
The utility model relates to mechanical seal field, particularly relates to inflation off-load switch.
Background technique
Off-load switch is the important unit product of the one of aerospace field pressurization system, is communicated with, thereby realizes tank ftercompction or the function of increasing pressure to target aircraft by loading line with gas cylinder.Off-load switch, generally in closed condition, in the time that storage pressure is not enough, can be the continuous ftercompction of gas cylinder automatically, guarantees that storage pressure maintains certain level.Due in fields such as space flight and aviation, gas cylinder working pressure span is larger, requires switch under high and low pressure operating mode, all to work well.Unstable properties under tradition off-load switch high and low pressure operating mode, has had a strong impact on work duration and the operating life of target aircraft.
Model utility content
Technology of the present utility model is dealt with problems and is: overcome the deficiencies in the prior art, a kind of discharging type gas-filled switching tube is provided, can meet the usage requirement under large pressure span, improve stability and the operating life of aerospace field Related product.
Technical solution of the present utility model is: a kind of off-load switch, comprises housing, screw rod, push rod, main valve alive, off-load valve alive, spring, lock nut; One end of described housing has tapped hole, and the other end of housing has valve pocket main alive for placing main valve alive and carries out shutoff with lock nut; On described screw rod, screwed one end has U-shaped groove, and U-shaped groove stretches in tapped hole, for making screw rod axial advancement in tapped hole; One end of described push rod be positioned at U-shaped groove and with screw rod clamping; The sealed end of described off-load valve alive is the conical surface; The other end of push rod points to the cone angle of the conical surface; In housing sidewall, have air-filled pore and exhaust port, air-filled pore, exhaust port and main valve pocket alive connect successively; Main valve alive forms guiding with the inwall of main valve pocket alive and coordinates; The inside of main valve alive has the off-load valve pocket alive of placing off-load valve alive, and off-load valve alive forms to lead with the inwall of off-load valve pocket alive and coordinates; The conical surface press seal of the internal surface of the sealed end of main valve alive and off-load valve alive, the internal surface press seal of the outer surface of main valve seal end alive and housing; Off-load valve alive is withstood in one end of spring from the inside of off-load valve alive, the other end passes successively off-load valve pocket and main valve pocket alive alive and withstands the internal surface of lock nut.
The internal surface of described main valve seal end alive and outer surface all adopt nonmetallic material to be used for press seal.
Between described air-filled pore and main valve pocket alive, there is R type valve seat, R type valve seat and main valve seal end outer surface press seal alive.
Described screw rod and push rod are radially gapped, and when screw rod axial advancement in tapped hole, the U-shaped groove on screw rod drives ejector rob axis to march forward, and withstands the cone angle of the conical surface of off-load valve alive.
The utility model compared with prior art beneficial effect is:
(1) adopt " R-cone " dual face seals unloading-structure by design, utilize the automatic centering that cone structure is good, can meet the seal request of switch under high and low pressure simultaneously, and off-load valve alive and main valve alive share nonmetal Sealing, structure and manufacturing procedure are simplified, have reduced production difficulty;
(2) by push rod is adopted to split-type design, when screw rod precession, push rod can not rotate with screw rod, this structural type can effectively be alleviated under high pressure operating mode and to open push rod and the wearing and tearing of living between valve while living valve, reduces because wearing and tearing produce fifth wheel, and then the probability of reduction seal failure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model, for unstable properties problem under traditional off-load switch high and low pressure operating mode, provides a kind of off-load switch that can meet usage requirement under large pressure span.
As shown in Figure 1, the utility model comprises housing, screw rod, push rod, main valve alive, off-load valve alive, spring 6, lock nut 7.
One end of housing 1 has tapped hole, and shutoff is also carried out with lock nut 7 in valve main alive 4 chambeies that the other end of housing 1 has for placing main valve alive 4.On screw rod 2, screwed one end has U-shaped groove, and U-shaped groove stretches in tapped hole, for making screw rod 2 axial advancement in tapped hole.Screw rod 2 coordinates formation top opening with push rod 3.One end of push rod 3 be positioned at U-shaped groove and with screw rod 2 clampings.The sealed end of off-load valve 5 alive is the conical surface.The other end of push rod 3 points to the cone angle of the conical surface.Screw rod 2 and push rod 3 are radially gapped, be for split type between screw rod 2 and push rod 3, when screw rod 2 precession, can not rotate with screw rod 2 by push rod 3, this structural type can effectively be alleviated under high pressure operating mode and to open the wearing and tearing between push rod 3 and work valve while living valve, reduce because wearing and tearing produce fifth wheel, and then make the probability of seal failure.When screw rod 2 axial advancement in tapped hole, the U-shaped groove on screw rod 2 drives push rod 3 axial advancement, withstands the cone angle of the conical surface of off-load valve 5 alive.On housing 1 sidewall, have air-filled pore 8 and exhaust port 9, air-filled pore 8, exhaust port 9 and main valve alive 4 chambeies connect successively; Main valve alive 4 forms guiding with the inwall in main valve alive 4 chambeies and coordinates; The inside of main valve alive 4 has off-load valve alive 5 chambeies of placing off-load valve 5 alive, and off-load valve 5 alive forms to lead with the inwall in off-load valve alive 5 chambeies and coordinates; The internal surface of main valve alive 4 sealed ends and outer surface all adopt nonmetallic material to be used for press seal.Conical surface press seal, the outer surface of main valve 4 sealed ends alive and the internal surface press seal of housing 1 of the internal surface of the sealed end of main valve alive 4 and off-load valve 5 alive.If R type valve seat is set between air-filled pore 8 and main valve alive 4 chambeies, R type valve seat and main valve alive 4 sealed end outer surface press seals, R type valve seat with can increase sealing surface, there is better sealing effect.The conical surface of R type valve seat and off-load valve 5 alive forms " R-cone " dual face seals unloading-structure, utilizes the automatic centering that cone structure is good, can meet the seal request of switch under high and low pressure simultaneously.The off-load valve 5 of living is withstood from the live inside of valve 5 of off-load in one end of spring 6, and the other end is successively through off-load live valve 5 chambeies and main valve alive 4 chambeies withstand the internal surface of lock nut 7, for time the off-load valve 5 of living drive main valve alive 4 returns.
Air-filled pore 8 and outside being connected to gas cylinder, exhaust port 9 is closed.In the time that needs are given inflating gas cylinder, manually screw in screw rod 2, screw rod 2 drives push rod 3 to back down off-load valve 5 alive, enter air-filled pore 8 to the gas in gas cylinder, enter off-load valve alive 5 chambeies, now main valve alive 4 is opened under pressure difference effect, realizes to inflating gas cylinder again, when air pressure that off-load is lived in valve 5 is excessive, can open exhaust port 9 discharge section gases.After inflation, manually screw out screw rod 2, drive push rod 3 together to exit, under spring 6 power effects, off-load valve 5 alive drives main valve alive 4 returns, under atmospheric pressure and spring 6 power actings in conjunction, off-load valve 5 alive is realized sealing by the conical surface, and main valve 4 alive is realized sealing by R type valve seat.In addition, off-load switch has automatic compensation function, and in the time that 9 mouthfuls of air-filled pore 8 and exhaust ports have certain pressure poor, the off-load valve 5 of living can be opened automatically, realizes the automatic inflating device to gas cylinder.
The content not being described in detail in the utility model specification belongs to those skilled in the art's known technology.
Claims (4)
1. an off-load switch, is characterized in that: comprise housing (1), screw rod (2), push rod (3), main valve alive (4), off-load valve (5), spring (6) alive, lock nut (7); One end of described housing (1) has tapped hole, and shutoff is also carried out with lock nut (7) in valve main alive (4) chamber that the other end of housing (1) has for placing main valve alive (4); The upper screwed one end of described screw rod (2) has U-shaped groove, and U-shaped groove stretches in tapped hole, for making screw rod (2) axial advancement in tapped hole; One end of described push rod (3) be positioned at U-shaped groove and with screw rod (2) clamping; The sealed end of described off-load valve alive (5) is the conical surface; The other end of push rod (3) points to the cone angle of the conical surface; On housing (1) sidewall, have air-filled pore (8) and exhaust port (9), air-filled pore (8), exhaust port (9) and main valve alive (4) chamber connect successively; Main valve alive (4) forms guiding with the inwall in main valve alive (4) chamber and coordinates; The inside of main valve alive (4) has off-load valve (5) the alive chamber of placing off-load valve alive (5), and off-load valve alive (5) forms to lead with the inwall in off-load valve (5) alive chamber and coordinates; The conical surface press seal of the internal surface of the sealed end of main valve alive (4) and off-load valve alive (5), the outer surface of main valve alive (4) sealed end and the internal surface press seal of housing (1); Off-load valve alive (5) is withstood from the inside of off-load valve alive (5) in one end of spring (6), and the other end passes successively off-load valve (5) chamber and main valve alive (4) chamber alive and withstands the internal surface of lock nut (7).
2. a kind of off-load switch according to claim 1, is characterized in that: internal surface and the outer surface of described main valve alive (4) sealed end all adopt nonmetallic material to be used for press seal.
3. a kind of off-load switch according to claim 1, is characterized in that: between described air-filled pore (8) and main valve alive (4) chamber, have R type valve seat, R type valve seat and main valve alive (4) sealed end outer surface press seal.
4. a kind of off-load switch according to claim 1, it is characterized in that: described screw rod (2) and push rod (3) are radially gapped, when screw rod (2) axial advancement in tapped hole, U-shaped groove on screw rod (2) drives push rod (3) axial advancement, withstands the cone angle of the conical surface of off-load valve alive (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320685403.5U CN203614833U (en) | 2013-10-31 | 2013-10-31 | Unloading switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320685403.5U CN203614833U (en) | 2013-10-31 | 2013-10-31 | Unloading switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614833U true CN203614833U (en) | 2014-05-28 |
Family
ID=50767480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320685403.5U Expired - Lifetime CN203614833U (en) | 2013-10-31 | 2013-10-31 | Unloading switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114676A (en) * | 2015-09-16 | 2015-12-02 | 航宇救生装备有限公司 | Anti-load pressure regulator pre-pressurizing mechanism with selecting function |
| CN112483654A (en) * | 2020-10-27 | 2021-03-12 | 北京宇航系统工程研究所 | Quick response solenoid valve |
-
2013
- 2013-10-31 CN CN201320685403.5U patent/CN203614833U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114676A (en) * | 2015-09-16 | 2015-12-02 | 航宇救生装备有限公司 | Anti-load pressure regulator pre-pressurizing mechanism with selecting function |
| CN105114676B (en) * | 2015-09-16 | 2017-07-11 | 航宇救生装备有限公司 | A kind of anti-G valve preliminary filling press mechanism with selection function |
| CN112483654A (en) * | 2020-10-27 | 2021-03-12 | 北京宇航系统工程研究所 | Quick response solenoid valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |
|
| CX01 | Expiry of patent term |