CN205639986U - Quick -operation joint who has voltage limiting function - Google Patents
Quick -operation joint who has voltage limiting function Download PDFInfo
- Publication number
- CN205639986U CN205639986U CN201620402101.6U CN201620402101U CN205639986U CN 205639986 U CN205639986 U CN 205639986U CN 201620402101 U CN201620402101 U CN 201620402101U CN 205639986 U CN205639986 U CN 205639986U
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- China
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- spring
- valve
- snap joint
- valve seat
- valve pocket
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- Withdrawn - After Issue
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Abstract
The utility model discloses a quick -operation joint who has voltage limiting function, characterized by, be in including the joint body, base, setting connect internal case, first spring, second spring, valve barrel and disk seat, case, valve barrel, second spring and nut constitution overflow valve, first spring setting valve barrel, disk seat inside and coaxial, offer valve barrel thrust, the second spring sets up at disk seat, valve barrel insidely and coaxial, be provided with the step that is used for withstanding the one end of first spring both ends and second spring on valve barrel and the disk seat respectively, the disk seat is connected the body and the base is fixed, and the valve barrel uses the outer face of cylinder of disk seat and slides for the direction. The utility model discloses the beneficial effect who reaches: this device is directly integrated in quick -operation joint's inside with the overflow valve, has avoided the outer component that adds, makes the hydraulic system oil circuit oversimplify, does not need additionally to increase component protection device to anti -pollution effect has.
Description
Technical field
This utility model relates to a kind of snap joint, is specifically related to a kind of snap joint having pressure-limiting function.
Background technology
As a example by large-tonnage crawler crane, complete machine needs the critical piece of machine to dismantle when transport, split is transported, this fluid pressure line allowing for being laid on this components interior splits together, need between parts with parts to be connected with the snap joint of more convenient dismounting and installation, and make separate two parts oil circuit form respective oil closed cavity, as shown in Fig. 1 (a) (b).
As a example by motor and hydraulic cylinder use, hydraulic motor housing work when needs single draining oil circuit to lead back fuel tank；But, after parts dismounting, the oil circuit of this part is also required to be disconnected by snap joint, motor shell, fluid pressure line and snap joint is made to be internally formed a cavity volume closed, owing to hydraulic oil exists the larger volume coefficient of expansion, ambient temperature rises higher when, the hydraulic oil in this closing cavity volume will expand and cause intracavity oil pressure to raise, and causes motor drive shaft bad seals even motor shell to rupture.Crawler crane, major part hydraulic cylinder is the carrying of big chamber, by load holding valve pressurize, connects reversal valve by snap joint and be indirectly connected with fuel tank after load holding valve；Hydraulic jack is after disassembled for transport, and big chamber is all closed by snap joint with loculus；If ambient temperature raises, oil cylinder big small oil cavity hydraulic oil is caused to expand, pressure is raised, sized by Yin there is bigger difference in cavity area, big chamber stress is big, directly acts on loculus, so little cavity pressure is often far above big chamber several times (oil cylinder big chamber effective area and the area ratio of loculus), cause loculus hydraulic oil to carry out pressure release by sealing at oil cylinder inner seal rings or fairlead, cause cylinder seal to lose efficacy and even cause cylinder barrel to swell and scrap completely.
Utility model content
For solving the deficiencies in the prior art; the purpose of this utility model is to provide a kind of snap joint having pressure-limiting function; can solve the problem that the closed containing cavity of the element being connected with snap joint is because opening overflow when fluid expands, it is to avoid component wear, hydraulic pressure specialty is referred to as Thermal protection.
In order to realize above-mentioned target, this utility model adopts the following technical scheme that:
A kind of snap joint having pressure-limiting function, is characterized in that, including fittings body, base, the spool being arranged in described fittings body, the first spring, the second spring, valve pocket and valve seat；Described fittings body is connected with base；Described valve seat is fastened by fittings body and base pinch；The end of described spool is provided with the nut for fixing the second spring one end, and spool, the second spring and nut constitute overflow valve to limit the oil pressure lift-off value in the component seal chamber connected；Described first spring is arranged on valve pocket, valve seat is internal and coaxial, be supplied to valve pocket thrust, and it is internal and coaxial that the second spring is arranged on valve seat, valve pocket；It is separately provided for withstanding the step of one end of the first both ends of the spring and the second spring on described valve pocket and valve seat；The internal diameter of described valve pocket and the external diameter of valve seat have dimensional fits requirement, and valve pocket slides with valve seat external cylindrical surface for guiding, to play when quickly connecing in succession or separate for a pair, it is ensured that oil duct on-off effect.
Aforesaid a kind of snap joint having pressure-limiting function, is characterized in that, the other end of described second spring is withstood by the step on valve pocket or valve seat.
Aforesaid a kind of snap joint having pressure-limiting function, is characterized in that, described fittings body is provided with groove；Described fittings body matches with famale connector or male contact.
Aforesaid a kind of snap joint having pressure-limiting function, is characterized in that, described base uses hollow structure, is connected with oil circuit.
Aforesaid a kind of snap joint having pressure-limiting function, it is characterized in that, separating and under idle state with pairing snap joint at this device, described fittings body, valve seat, valve seat, spool, the first spring, the second spring are internally formed sealing structure with spool, valve pocket at valve pocket at fittings body；Described overflow valve is used for pressure limiting.
Aforesaid a kind of snap joint having pressure-limiting function, it is characterized in that, when this device is connected with pairing snap joint and normally works, described valve pocket without relative motion, is constantly in sealing state together with spool is all the time under the snap joint matched, the first spring, the second acting force of the spring.
The beneficial effect that this utility model is reached: the advantage of this device is the inside that overflow valve is directly integrated in snap joint, it is to avoid add element outside, make element oil circuit simplify, it is not necessary to additionally to increase element protection；；When separate with pairing snap joint, the oil circuit that base will not be made to be connected is open, has antipollution effect；This device is connected with pairing snap joint, normally works when, valve pocket and spool all the time the snap joint of pairing, the first spring, the second acting force of the spring next rise and move without relative motion, be constantly in sealing state.
Accompanying drawing explanation
Fig. 1 (a) (b) is connection status and the structural representation of released state of a pair snap joint respectively；
Fig. 2 is the structural representation of this device；
Fig. 3 is another structural representation of this device.
The implication of reference in figure:
1-spool, 2-valve pocket, 3-the first spring, 4-valve seat, 5-fittings body, 6-the second spring, 7-nut, 8-base, a, c-step, b-contact surface, e-groove.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described.Following example are only used for clearly illustrating the technical solution of the utility model, and can not limit protection domain of the present utility model with this.
In prior art as a example by motor uses, what motor shell pressure release at present was taked is by inserting a check valve with certain back pressure in parallel or overflow valve on oil circuit fast, after disconnecting fast inserting, if the hydraulic fluid pressure within motor shell raises, hydraulic oil can form pressure release during valve is leaking directly into air in parallel.Although such scheme serves identical effect, but the check valve selected or overflow valve are if there is damage, the when of causing normally working, hydraulic oil in motor shell is not by pipeline oil sump tank, but directly outflowed by check valve or overflow valve, increase hydraulic system fault, pollute environment；Its two, around motor, attached some elements because increasing this device, cause around motor oil circuit unsightly.
The structure of this device is illustrated in figure 2 the male contact of snap joint, and left end is connected with famale connector, and right-hand member base 8 is joined directly together with oil circuit；There is no spool the 1, second spring 6, nut 7 inside existing general snap joint, and the element left side corresponding to the valve pocket 2 of this device is the planar structure closed.Spool the 1, second spring 6, nut 7 constitute overflow valve.Spring left end withstands on the step a of valve pocket 2, and the other end relies on the step c of valve seat 4 to fix, and valve seat 4 is fixedly clamped by fittings body 5 and base 8.
In the present embodiment, the second spring 6 left end relies on the right flank of the step a of valve pocket 2 to fix, and right-hand member is fixed by nut 7.
Its operation principle is, when a pair snap joint connects, fittings body 5 is connected with famale connector, spool 1 and valve pocket 2 are backed down by famale connector and jointly move right (without relative motion), compress the first spring 3, at this moment valve pocket 2 and fittings body 5 separate on contact surface b, move in guiding inner circle that valve pocket 2 is provided at fittings body 5 respectively and the guiding cylindrical that valve seat 4 is provided, until the left side of spool 1 and valve pocket 2 completely disengages from b face, form ring shaped oil passage A, famale connector is stuck on the groove e of fittings body 5, makes the cloudy snap joint of sun link together.
When negative and positive snap joint separates, carry out according to above-mentioned contrary principle, when snap joint is separate time, the oil circuit that base 8 is connected is just by spool 1, valve pocket 2, fittings body 5 and be closed, if pressure rises in oil circuit, hydraulic oil acts on spool 1 by the gap between oil duct B or valve pocket 2 and valve seat 4, at this moment the second spring 6 will compress under the restriction of the step a right flank of valve pocket 2 and the left surface of nut 7, spool 1 end motion to the left, make hydraulic oil release with the gap of valve pocket 2 from the spool 1 of snap joint, thus limit pressure and rise.
In this device, the rigidity of the second spring 6 determines the maximum that the pressure in closed cavity volume rises, and the second spring 6 can be carried out suitable regulation or replacing, change the rigidity of its correspondence according to actual needs.
Fig. 3 is only the change of another details of this device, and in this figure, the step c on the other end valve seat 4 of the second spring 6 withstands (being withstood by the step a of valve pocket 2 in Fig. 2), and principle is identical with upper.
The utility model has the advantages that:
1) fast inserting is internally integrated overflow valve: overflow valve is directly integrated in the inside of snap joint, it is to avoid adds element outside, makes element oil circuit simplify, it is not necessary to additionally to increase element protection；
2) maximum that pressure rises can be limited: the second spring 6 can be carried out suitable regulation or replacing, change the spring force of its correspondence according to actual needs.
3) the normally off close, there is dust-proof antipollution function: owing to spool 1 is in, under the effect of the second spring 6, the state of shutting all the time, even if so the oil circuit that base 8 also will not be made disconnecting when to be connected is open, there is dust-proof or antipollution effect.
4) safety is high: be to play a role in the case of oil circuit disconnects owing to having the snap joint of function described by this utility model, thus fast insert connection normally work when, do not have the outer parallel oil path loss added bad and the phenomenon of draining all the time occurs.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; on the premise of without departing from this utility model know-why; can also make some improvement and deformation, these improve and deformation also should be regarded as protection domain of the present utility model.
Claims (4)
1. there is a snap joint for pressure-limiting function, it is characterized in that, including fittings body, base and be arranged on the spool in described fittings body, the first spring, the second spring, valve pocket and valve seat；Described fittings body is connected with base；Described valve seat is fastened by fittings body and base pinch；
The end of described spool is provided with the nut for fixing the second spring one end, and spool, the second spring and nut constitute overflow valve；
It is internal and coaxial that described first spring and the second spring are arranged at valve pocket, valve seat, and the first spring is for providing thrust to valve pocket；It is separately provided for withstanding the step of the first both ends of the spring on described valve pocket and valve seat；
Described valve seat is fixed by fittings body and base；Described valve pocket slides with valve seat external cylindrical surface for guiding.
A kind of snap joint having pressure-limiting function the most according to claim 1, is characterized in that, the other end of described second spring is withstood by the step on valve pocket or valve seat.
A kind of snap joint having pressure-limiting function the most according to claim 1, it is characterized in that, separating and under idle state with pairing snap joint at this device, described fittings body, valve seat, valve seat, spool, the first spring, the second spring are internally formed sealing structure with spool, valve pocket at valve pocket at fittings body；Described overflow valve is used for pressure limiting.
A kind of snap joint having pressure-limiting function the most according to claim 1, it is characterized in that, when this device is connected with pairing snap joint and normally works, described valve pocket without relative motion, is constantly in sealing state together with spool is all the time under the snap joint matched, the first spring, the second acting force of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620402101.6U CN205639986U (en) | 2016-05-05 | 2016-05-05 | Quick -operation joint who has voltage limiting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620402101.6U CN205639986U (en) | 2016-05-05 | 2016-05-05 | Quick -operation joint who has voltage limiting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205639986U true CN205639986U (en) | 2016-10-12 |
Family
ID=57049579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620402101.6U Withdrawn - After Issue CN205639986U (en) | 2016-05-05 | 2016-05-05 | Quick -operation joint who has voltage limiting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205639986U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715892A (en) * | 2016-05-05 | 2016-06-29 | 徐工集团工程机械股份有限公司 | Quick joint with pressure limit function |
| CN113819325A (en) * | 2021-08-23 | 2021-12-21 | 中航光电科技股份有限公司 | Quick connector with pressure relief function |
-
2016
- 2016-05-05 CN CN201620402101.6U patent/CN205639986U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715892A (en) * | 2016-05-05 | 2016-06-29 | 徐工集团工程机械股份有限公司 | Quick joint with pressure limit function |
| CN113819325A (en) * | 2021-08-23 | 2021-12-21 | 中航光电科技股份有限公司 | Quick connector with pressure relief function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20190329 |
|
| AV01 | Patent right actively abandoned |