CN105715892A - Quick joint with pressure limit function - Google Patents
Quick joint with pressure limit function Download PDFInfo
- Publication number
- CN105715892A CN105715892A CN201610293081.8A CN201610293081A CN105715892A CN 105715892 A CN105715892 A CN 105715892A CN 201610293081 A CN201610293081 A CN 201610293081A CN 105715892 A CN105715892 A CN 105715892A
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- CN
- China
- Prior art keywords
- spring
- valve
- snap joint
- base
- valve seat
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/38—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings
- F16L37/40—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings with a lift valve being opened automatically when the coupling is applied
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a quick joint with a pressure limit function. The quick joint is characterized by comprising a joint body, a base, a valve element arranged in the joint body, a first spring, a second spring, a valve sleeve and a valve base, wherein the valve element, the valve sleeve, the second spring and a nut constitute an overflow valve; the first spring is coaxially arranged in the valve sleeve and the valve base and supplies thrust to the valve sleeve; the second spring is coaxially arranged in the valve base and the valve sleeve; the valve sleeve and the valve base are respectively provided with steps used for propping against two ends of the first spring and one end of the second spring; the valve base is fixed by virtue of the joint body and the base; the valve sleeve slides under guidance of the external cylindrical surface of the valve base. The quick joint has the beneficial effects that the overflow valve is directly integrated in the quick joint, so that additional elements are avoided, an oil way of a hydraulic system is simplified, an element protection device is not needed to be additionally arranged, and the quick joint has an antipollution effect.
Description
Technical field
The present invention relates to a kind of snap joint, be specifically related to a kind of snap joint having pressure-limiting function.
Background technology
For 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 two parts oil circuit separately form respective oil closed cavity, as shown in Fig. 1 (a) (b).
Using for motor and hydraulic cylinder, hydraulic motor housing when work needs independent 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, when ambient temperature rising is higher, 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 closed each through snap joint with loculus；If ambient temperature raises, cause that the big small oil cavity hydraulic oil of oil cylinder expands, pressure is raised, sized by cause 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 (area ratio of oil cylinder big chamber effective area and loculus), cause loculus hydraulic oil to be sealed by oil cylinder inner seal rings or fairlead place and carry out pressure release, cause cylinder seal to lose efficacy and even cause cylinder barrel to swell and scrap completely.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide a kind of snap joint having pressure-limiting function, it is possible to the closed containing cavity of the element that solution is connected with snap joint is because opening overflow when fluid expands, it is to avoid component wear, hydraulic pressure specialty is called Thermal protection.
In order to realize above-mentioned target, the present invention 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；Described valve pocket and valve seat are separately provided for withstanding the step of one end of the first both ends of the spring and the second spring；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 a pair quick succession connects or separate, 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 adopts 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 at valve pocket with spool, valve pocket and fittings body place；Described overflow valve is used for pressure limiting.
Aforesaid a kind of snap joint having pressure-limiting function, it is characterized in that, being connected and during normal operation with pairing snap joint at this device, described valve pocket without relative motion, is constantly in sealing state together with spool is all the time under the snap joint of pairing, the first spring, the second acting force of the spring.
The beneficial effect that the present invention reaches: the advantage of this device is the inside that overflow valve is directly integrated in snap joint, it is to avoid outer add element, makes element oil circuit simplify, it is not necessary to additionally to increase element protection；；With pairing snap joint separate time, the oil circuit opening that base connects will not be made, there is antipollution effect；Be connected with pairing snap joint at this device, when normal operation, valve pocket and spool all the time the snap joint of pairing, the first spring, the second acting force of the spring next play motion without relative motion, be constantly in sealing state.
Accompanying drawing explanation
Fig. 1 (a) (b) is the structural representation of the connection status of a pair snap joint and released state respectively；
Fig. 2 is the structural representation of this device；
Fig. 3 is another structural representation of this device.
The implication of accompanying drawing labelling 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 accompanying drawing, the invention will be further described.Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
For motor use in prior art, what current motor shell pressure release 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 be leaking directly in air by valve in parallel, forms pressure release.Although such scheme serves identical effect, but the check valve selected or overflow valve are if there is damage, when causing normal operation, 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, contaminated 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 and famale connector are connected, and right-hand member base 8 and oil circuit are joined directly together；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, motion in guiding inner circle that valve pocket 2 provides at fittings body 5 respectively and the guiding cylindrical that valve seat 4 provides, 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 separates time, the oil circuit that base 8 connects 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, making to release the gap of the hydraulic oil spool 1 from snap joint and valve pocket 2, rising thus limiting pressure.
In this device, the rigidity of the second spring 6 determines the maximum that the pressure in closed cavity volume rises, it is possible to according to actual needs, the second spring 6 is carried out suitable adjustment or replacing, changes the rigidity of its correspondence.
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 with upper identical.
The invention have the advantage that
1) fast inserting is internally integrated overflow valve: overflow valve is directly integrated in the inside of snap joint, it is to avoid outer add element, makes element oil circuit simplify, it is not necessary to additionally to increase element protection；
2) maximum that pressure rises can be limited: according to actual needs, the second spring 6 can be carried out suitable adjustment or replacing, change the spring force of its correspondence.
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 open without the oil circuit making base 8 connect when disconnecting, there is dust-proof or antipollution effect.
4) safety is high: be play a role when oil circuit disconnects owing to having the snap joint of function described in the invention, thus fast insert connect normal operation in, do not have the outer parallel oil path loss added and the phenomenon of draining all the time badly occur.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
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；Described valve pocket and valve seat are separately provided for withstanding the step of the first both ends of the spring；
Described valve seat is fixed by fittings body and base；Described valve pocket slides with valve seat external cylindrical surface for guiding.
2. a kind of snap joint having pressure-limiting function 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.
3. a kind of snap joint having pressure-limiting function 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 at valve pocket with spool, valve pocket and fittings body place；Described overflow valve is used for pressure limiting.
4. a kind of snap joint having pressure-limiting function according to claim 1, it is characterized in that, it is connected and during normal operation with pairing snap joint at this device, described valve pocket without relative motion, is constantly in sealing state together with spool is all the time under the snap joint of pairing, the first spring, the second acting force of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293081.8A CN105715892B (en) | 2016-05-05 | 2016-05-05 | A kind of quick coupling having pressure-limiting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293081.8A CN105715892B (en) | 2016-05-05 | 2016-05-05 | A kind of quick coupling having pressure-limiting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105715892A true CN105715892A (en) | 2016-06-29 |
| CN105715892B CN105715892B (en) | 2019-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293081.8A Active CN105715892B (en) | 2016-05-05 | 2016-05-05 | A kind of quick coupling having pressure-limiting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105715892B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151177A (en) * | 2021-12-06 | 2022-03-08 | 凯龙高科技股份有限公司 | Urea returns integrated overflow valve device of liquid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060102238A1 (en) * | 2004-11-17 | 2006-05-18 | Watson Richard R | Dual path hydraulic coupling |
| CN103591317A (en) * | 2010-12-31 | 2014-02-19 | 李耀强 | Throttling valve and water pipe connector with same |
| EP2698574A1 (en) * | 2012-08-16 | 2014-02-19 | Patrice Mazigh | Connector for connecting pipes of an air-conditioning system and associated air-conditioning device |
| CN103672248A (en) * | 2012-09-20 | 2014-03-26 | 北京精密机电控制设备研究所 | Threaded connection and non-leakage fluid connector |
| CN105351268A (en) * | 2015-10-16 | 2016-02-24 | 北京精密机电控制设备研究所 | Expansion valve used for electro-hydraulic servo mechanism |
| CN205639986U (en) * | 2016-05-05 | 2016-10-12 | 徐工集团工程机械股份有限公司 | Quick -operation joint who has voltage limiting function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387460Y (en) * | 1999-09-23 | 2000-07-12 | 万佩柳 | Safety decompression valve of multifunctional water storage electrothermal water heater |
-
2016
- 2016-05-05 CN CN201610293081.8A patent/CN105715892B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060102238A1 (en) * | 2004-11-17 | 2006-05-18 | Watson Richard R | Dual path hydraulic coupling |
| CN103591317A (en) * | 2010-12-31 | 2014-02-19 | 李耀强 | Throttling valve and water pipe connector with same |
| EP2698574A1 (en) * | 2012-08-16 | 2014-02-19 | Patrice Mazigh | Connector for connecting pipes of an air-conditioning system and associated air-conditioning device |
| CN103672248A (en) * | 2012-09-20 | 2014-03-26 | 北京精密机电控制设备研究所 | Threaded connection and non-leakage fluid connector |
| CN105351268A (en) * | 2015-10-16 | 2016-02-24 | 北京精密机电控制设备研究所 | Expansion valve used for electro-hydraulic servo mechanism |
| CN205639986U (en) * | 2016-05-05 | 2016-10-12 | 徐工集团工程机械股份有限公司 | Quick -operation joint who has voltage limiting function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151177A (en) * | 2021-12-06 | 2022-03-08 | 凯龙高科技股份有限公司 | Urea returns integrated overflow valve device of liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105715892B (en) | 2019-03-29 |
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