CN202597313U - Thread plug-in differential relief valve - Google Patents
Thread plug-in differential relief valve Download PDFInfo
- Publication number
- CN202597313U CN202597313U CN 201220213132 CN201220213132U CN202597313U CN 202597313 U CN202597313 U CN 202597313U CN 201220213132 CN201220213132 CN 201220213132 CN 201220213132 U CN201220213132 U CN 201220213132U CN 202597313 U CN202597313 U CN 202597313U
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- Prior art keywords
- valve
- sleeve
- differential
- connecting sleeve
- valve pocket
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- Expired - Fee Related
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Abstract
The utility model relates to a thread plug-in differential relief valve, which comprises a valve sleeve provided with a peripheral radial hole, and is characterized in that a valve seat, a valve core and a differential sleeve are arranged in the valve sleeve, wherein the left end of the valve seat is matched with the right end of the valve core, the differential sleeve is disposed between the valve core and the valve sleeve, the left end of the valve core is connected with a connecting sleeve, the differential sleeve and a connecting sleeve are sealed, a spring seat is arranged in the connecting sleeve, a pressure adjusting spring is arranged outside the spring seat, an adjusting screw is arranged between the pressure adjusting spring and the connecting sleeve, and a locking nut is arranged on the end portion of the adjusting screw. The thread plug-in differential relief valve has the advantages that the differential sleeve plays the guiding role for axial movement of the valve core, limits trembling and instability during the opening process of the valve core, does not have noise during the opening process, and is steady in pressure.
Description
Technical field
The utility model relates to a kind of differential overflow valve, relates in particular to a kind of thread cartridge formula differential overflow valve.
Background technique
In the hydraulic pressure valve, because many thread cartridge formula relief valves had appearred in the requirement of the system intergration and miniaturization in recent years.Can be divided into leading type structure and direct dynamic structure according to working principle.They all are that the principle of utilizing the hydraulic coupling act on the spool and spring force to balance each other is come work, and the pressure of hydraulic system is regulated and controlled.Pilot operated compound relief valve is mainly used in mesohigh, the big flow system; It is made up of main valve and pilot valve two-part, in real work, just can play control action after requiring main valve and pilot valve all to move; So pressure regulation sensitivity is relatively poor; Pressure is set up slow, but the pressure regulation precision is high, and open and shut characteristic is good.Direct-acting overflow valve is mainly used in low pressure, the small flow system, and it is that spool and pressure adjusting spring are direct acting, so pressure regulation is highly sensitive; But open and shut characteristic is relatively poor, when being used for mesohigh, big flow system, requires pressure adjusting spring to have very big spring force; This just makes the adjusting function variation, also is difficult on the structure realize, the direct-acting type spool all is the single-cantilever structure simultaneously; Can produce when under the power of surging greatly, opening and tremble and instability, this will produce very big noise and pressure regulation is unstable.Now in some mesohighs, the big flow dedicated hydraulic system; Require relief valve to have that build-up pressure is rapid, pressure regulation is highly sensitive, open and shut characteristic is high, the noiseless performance of pressure regulation process, existing thread cartridge leading type and direct-acting overflow valve all can not well satisfy usage requirement.
Summary of the invention
To defective of the prior art, the utility model provides a kind of opening process noise free, pressure thread cartridge formula differential overflow valve stably.
For reaching the technological scheme that above-mentioned model utility purpose the utility model adopted be: thread cartridge formula differential overflow valve, comprise the valve pocket that is shaped on the circumference radial hole, it is characterized in that being provided with in the said valve pocket valve seat, spool and differential sleeve; Said valve seat left end cooperates with said spool right-hand member; Said differential sleeve is arranged between said spool and the said valve pocket, and said valve pocket left end is connected with connecting sleeve, seals between said differential sleeve and the said connecting sleeve; Be provided with spring seat in the said connecting sleeve; Said spring seat is provided with pressure adjusting spring outward, is provided with adjusting screw between said pressure adjusting spring and the said connecting sleeve, and said adjusting screw end disposes locking nut.
As further optimization, be interference fit between said valve seat and the said valve pocket to technique scheme.
As the further optimization to technique scheme, said connecting sleeve is fixed through riveting and said valve pocket near the end of valve pocket.
As the further optimization to technique scheme, said valve pocket left end is shaped on outside thread, and said connecting sleeve right-hand member is shaped on the internal thread that cooperates with said outside thread.
The utlity model has following advantage: differential sleeve play the guiding role to moving axially of spool, has limited spool trembling with unstable in opening process, so the opening process noise free, pressure is steady; Special advance, the drainback passage design can realize big through-current capacity.
Further specify below in conjunction with the mode of execution of accompanying drawing the utility model.
Description of drawings
Fig. 1 is the structural representation of a kind of preferred embodiments of the utility model.
Embodiment
As shown in Figure 1, thread cartridge formula differential overflow valve comprises the valve pocket 1 that is shaped on circumference radial hole 11; Be provided with valve seat 2, spool 3 and differential sleeve 4 in the said valve pocket 1, said valve seat 2 left ends cooperate with said spool 3 right-hand members, and said differential sleeve 4 is arranged between said spool 3 and the said valve pocket 1; Said valve pocket 1 left end is connected with connecting sleeve 5; Sealing is provided with spring seat 6 in the said connecting sleeve 5 between said differential sleeve 4 and the said connecting sleeve 5, the said spring seat 6 outer pressure adjusting springs 7 that are provided with; Be provided with adjusting screw 8 between said pressure adjusting spring 7 and the said connecting sleeve 5, said adjusting screw 8 ends dispose locking nut 9.Be interference fit between above-mentioned valve seat 2 and the said valve pocket 1.Above-mentioned connecting sleeve 5 passes through riveting near the end 51 of valve pocket 1, prevents that valve pocket 1 from getting loose.Said valve pocket 1 left end is shaped on outside thread, and said connecting sleeve 5 right-hand members are shaped on the internal thread that cooperates with said outside thread, and connecting sleeve 5 and valve pocket 1 are connected through internal and external threads.
The working principle of the utility model is following: when initial, when the P mouth pressure does not reach the setting pressure of pressure adjusting spring 7, spool 3 right-hand members with offset with valve seat 2 left ends; Form sealing, P mouth and T mouth are obstructed, when the P mouth pressure enough high; When the power on the spool 3 of acting on surpasses the setting pressure of pressure adjusting spring 7; Spool 3 is moved to the left in the endoporus of differential sleeve 4, opens the passage of P to T, has promptly realized overflow.
More than describe the preferred embodiment of the utility model in detail.The ordinary skill that should be appreciated that related domain need not creative work and just can make many modifications and variation according to the design of the utility model.Therefore, all technician in the art, all should fall in the protection domain of the utility model on the basis of existing technology through the available technological scheme of logical analysis, reasoning, or a limited experiment according to the design of the utility model.
Claims (4)
1. thread cartridge formula differential overflow valve; Comprise the valve pocket (1) that is shaped on circumference radial hole (11); It is characterized in that being provided with in the said valve pocket (1) valve seat (2), spool (3) and differential sleeve (4), said valve seat (2) left end cooperates with said spool (3) right-hand member, and said differential sleeve (4) is arranged between said spool (3) and the said valve pocket (1); Said valve pocket (1) left end is connected with connecting sleeve (5); Sealing is provided with spring seat (6) between said differential sleeve (4) and the said connecting sleeve (5) in the said connecting sleeve (5), the outer pressure adjusting spring (7) that is provided with of said spring seat (6); Be provided with adjusting screw (8) between said pressure adjusting spring (7) and the said connecting sleeve (5), said adjusting screw (8) end disposes locking nut (9).
2. thread cartridge formula differential overflow valve according to claim 1 is characterized in that being between said valve seat (2) and the said valve pocket (1) interference fit.
3. thread cartridge formula differential overflow valve according to claim 1 is characterized in that said connecting sleeve (5) fixes through riveting and said valve pocket (1) near the end (51) of valve pocket (1).
4. thread cartridge formula differential overflow valve according to claim 1 is characterized in that said valve pocket (1) left end is shaped on outside thread, and said connecting sleeve (5) right-hand member is shaped on the internal thread that cooperates with said outside thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213132 CN202597313U (en) | 2012-05-14 | 2012-05-14 | Thread plug-in differential relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220213132 CN202597313U (en) | 2012-05-14 | 2012-05-14 | Thread plug-in differential relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597313U true CN202597313U (en) | 2012-12-12 |
Family
ID=47314860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220213132 Expired - Fee Related CN202597313U (en) | 2012-05-14 | 2012-05-14 | Thread plug-in differential relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597313U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742662A (en) * | 2014-01-24 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Slide valve assembly of direct-acting overflow valve |
| CN103758807A (en) * | 2014-01-10 | 2014-04-30 | 张思学 | Automobile differential constant-current steering booster pump or threaded differential relief cartridge valve |
| CN104179747A (en) * | 2014-08-19 | 2014-12-03 | 合肥长源液压股份有限公司 | Integral-type multiple-directional reversing valve for forklifts |
| CN109404357A (en) * | 2018-10-30 | 2019-03-01 | 武汉船用机械有限责任公司 | A kind of overflow valve |
-
2012
- 2012-05-14 CN CN 201220213132 patent/CN202597313U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758807A (en) * | 2014-01-10 | 2014-04-30 | 张思学 | Automobile differential constant-current steering booster pump or threaded differential relief cartridge valve |
| CN103742662A (en) * | 2014-01-24 | 2014-04-23 | 中国船舶重工集团公司第七�三研究所 | Slide valve assembly of direct-acting overflow valve |
| CN104179747A (en) * | 2014-08-19 | 2014-12-03 | 合肥长源液压股份有限公司 | Integral-type multiple-directional reversing valve for forklifts |
| CN109404357A (en) * | 2018-10-30 | 2019-03-01 | 武汉船用机械有限责任公司 | A kind of overflow 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: 20121212 Termination date: 20150514 |
|
| EXPY | Termination of patent right or utility model |