CN201288712Y - Electromagnetic pilot control changing-over valve - Google Patents

Electromagnetic pilot control changing-over valve Download PDF

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Publication number
CN201288712Y
CN201288712Y CN 200820154161 CN200820154161U CN201288712Y CN 201288712 Y CN201288712 Y CN 201288712Y CN 200820154161 CN200820154161 CN 200820154161 CN 200820154161 U CN200820154161 U CN 200820154161U CN 201288712 Y CN201288712 Y CN 201288712Y
Authority
CN
China
Prior art keywords
main valve
control
valve
groove
control groove
Prior art date
Application number
CN 200820154161
Other languages
Chinese (zh)
Inventor
袁才富
朱剑根
刘峰伟
沈至伟
Original Assignee
上海立新液压有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 上海立新液压有限公司 filed Critical 上海立新液压有限公司
Priority to CN 200820154161 priority Critical patent/CN201288712Y/en
Application granted granted Critical
Publication of CN201288712Y publication Critical patent/CN201288712Y/en

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Abstract

The utility model discloses an electromagnetic pilot control reversing valve, comprising a main valve body with a pilot valve, the interior of the main valve has a main valve hole provided with a main valve core, the two ends of the main valve core are sleeved with springs, the two ends of the main valve body are provided with end caps covering the main valve core, the bottom of the main valve body is provided with an inner control groove and an outer control groove, which is characterized in that the inner control groove is a step type hole, the outside of the inner control groove is equipped with a big conical plug for preventing oil leakage, the inside of the inner control groove is equipped with a small conical plug for preventing an external control port X from communicating with a groove P. The conversion of external supply and internal supply of control oil is convenient, the structure is simplified, the cost is lowered, the leakage link is reduced, the spring has superior guidance and high reliability, the reversing startup pressure of the main valve core is low, and the application of the valve is wide.

Description

Electromagnetic pilot control selector valve

Technical field

The utility model relates to technical field of hydraulic, and concrete to relate to a kind of be the hydraulicdirectional control valve that the guide controls with the solenoid valve.

Background technique

In hydraulic system, in order to control the flow direction of hydraulic oil, often use a kind of hydraulicchange-over valve, this valve utilizes hydraulic oil to promote the spool commutation, to realize the control to high flow directional control valve.And hydraulicchange-over valve often adopts little latus rectum again.Hydraulicchange-over valve often adopts little bare sizing electro-magnetic valve to control the changeover valve core commutation of big flow as pilot-actuated valve again.The combination of this electromagnetic priority valve and hydraulicchange-over valve is electromagnetic pilot control selector valve.

The electromagnetic pilot control selector valve structure of traditional spring reset as shown in Figure 1 and Figure 2; The electromagnetic pilot control selector valve of the spring reset that this is traditional has the following disadvantages:

1. control oil is interior is to realize by the installation direction conversion with bearing pin for the conversion with outer confession.Figure 2 shows that outer deposition attitude, the microcephaly of bearing pin 01 separates control oil by the seal ring on the microcephaly 02 with P mouth and X mouth and is entered by the X mouth inwardly.As bearing pin 01 is oppositely installed, then major part inwardly, the microcephaly is stretched in the hole on the end cap outwardly, under the effect of P mouth pressure, top outwardly is spacing by end cap all the time, keeps the P mouth to communicate with the X mouth, control is oily to be provided by the P mouth.Shortcoming is the outer bearing pin of installing, the valve body structure complexity, and the complex structure of bearing pin own also will punch on end cap, makes the end cover structure complexity.

2. control oil arrives the channel track at main valve plug two ends, be at main valve body end face rat holing, communicate with straight hole and inclined hole on the end cap again, arrive spring chamber, seal groove fitting tight circle must be arranged on the end cap, the end cover structure complexity, and the sealing of end cap straight hole and main valve body inclined hole is the articulating that possible cause outer seepage.

3. the spring seat at main valve plug two ends is the plain cushion structure, the positioning and guiding of spring mainly is the little cylindrical of main valve plug end, gap between spring inside diameter and the little cylindrical is bigger, and the main valve plug commutation is carried out with reset cycle, guiding length is in the continuous change process, influence the working life of spring easily, reliability is influenced.

4. when off position, two ends spring pressing spring seat withstands on the main valve body, and main valve plug is limited in meta, and main valve plug shoulder and spring seat almost do not have the gap, only the little cylindrical and the gap of spring base hole and main valve plug.Behind control oil, control-oil pressure acts on the main valve plug end, and main valve plug begins to move.In the moment that begins to move, stress surface mainly is the end area of the little cylindrical of main valve plug, rather than the big cylindrical area of main valve plug, therefore needs bigger control-oil pressure could start main valve plug.And after the startup, the control oil that acts on the annulus area is to enter by the gap between spring seat and the main valve plug, and through-current capability is restricted.Working control oil active area when starting because of main valve plug is little, needs bigger control-oil pressure, thereby the restricted application of control-oil pressure is restricted.

The model utility content

The utility model purpose provides a kind of can reduce outer seepage link, and control oil is outer for easy with the conversion of interior confession, and the electromagnetic pilot control selector valve that designs simplification and breakout pressure are low overcomes the deficiencies in the prior art.

In order to address the above problem the technical solution of the utility model is such:

Electromagnetic pilot control selector valve comprises a main valve body that has pilot valve; Described main valve body inside has main valve hole, be provided with main valve plug in the described main valve hole, in valve body, also be cast with the P that communicates with main valve hole, T, A, the B groove, described T groove is two and is arranged on A, P, the outside of B groove, and it is continuous by inner flow passage, the main valve plug two ends are with spring, the main valve body two ends have the end cap that covers main valve plug, described main valve body bottom is provided with internal control groove and external control groove, it is characterized in that, described internal control groove is the stepped ramp type hole, is provided with in the outside of internal control groove to prevent to control the big cone blocking that oil exosmoses, and is provided with the little cone blocking that prevents that outside control mouth X from communicating with groove P in the inboard of internal control groove.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, big cone blocking and little cone blocking are arranged on the internal control groove by screw thread, and the stifled position of described conelet is located in the outer dead slot.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, described main valve hole two ends are made as counterbore, and described main valve body inside is provided with two inclined holes of symmetry, and described pilot valve communicates with the counterbore at main valve hole two ends respectively by two inclined holes on the valve body.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, described main valve plug two ends are provided with spring seat, and described spring one end is against on the spring seat, and the other end is against on the end cap.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, the hole that can be enclosed within on the main valve plug is arranged in the middle of the described spring seat, the spring seat outside is a two-stage step cylindrical, be provided with four through-flow grooves in big cylindrical bottom, pilot pressure oil active area when increasing the main valve plug startup, thus under less control-oil pressure, start main valve plug, and after main valve plug moves, have bigger area of passage to act on the ring surface.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, described internal control groove is arranged on the position of the P groove hydraulic fluid port of main valve body near the bottom surface, the parallel bottom surface with at the bottom of the main valve of this internal control groove.

According to above-mentioned described described electromagnetic pilot control selector valve, wherein, described valve body bottom surface also is provided with outside control mouth X, and described outside control mouth X communicates by the external control groove with the internal control groove.

Beneficial effect is, the utility model is provided with in the outside of internal control groove and prevents to control the big cone blocking that oil exosmoses and can dismantle, be provided with in the inboard of internal control groove and prevent that outside control mouth X from communicating with groove P and dismountable little cone blocking, make system oil outer for easy with the conversion of interior confession, designs simplification, reduce cost, reduce outer seepage link, the spring high advantage of reliability that led; In addition, make 4 grooves in the end of the big cylindrical of spring seat, pilot pressure oil active area when increasing the main valve plug startup, thereby under less control-oil pressure, start main valve plug, and after moving, main valve plug have bigger area of passage to act on the ring surface, make the breakout pressure of valve low, application adaptation is wide.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments;

Fig. 1 is the cross-sectional view of existing electromagnetic pilot control selector valve;

Fig. 2 is local L-L cross-sectional view of Fig. 1;

Fig. 3 is the cross-sectional view of a kind of electromagnetic pilot control of the utility model selector valve;

Fig. 4 is local M-M cross-sectional view of Fig. 3;

Fig. 5 is a spring seat cross-sectional view described in the utility model;

Fig. 6 is that the K of Fig. 5 is to view.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 3, the utility model electromagnetic pilot control selector valve, it comprises a main valve body 3, there is a main valve hole 17 inside, cast out P, T, A, B groove in the main valve hole 17, the T groove is cast with two, and two T grooves link to each other near outer survey and by inner flow passage respectively, P, T, A, B groove have the hole that passes to main valve body 3 bottom surfaces respectively, as the interface that communicates with the outside.P is a filler opening, and T is a return opening, and A, B are actuator port.Main valve hole 17 two ends are counterbore, and the top of main valve body 3 is equipped with pilot valve 6, and the two ends of this pilot valve 6 are equipped with electromagnet 16, according to the electromagnet 16 at pilot valve 6 two ends the dead electricity situation, decision has or not control oil.There are two straight holes 5 at main valve body 3 tops in A1 and corresponding section, B1 hole with pilot valve 6, and counterbore is connected by the inclined hole that gets out with straight hole 5.

With reference to figure 4, the P hydraulic fluid port of main valve body 3 is casting out the internal control groove 9 that is parallel to the bottom surface near the place, bottom surface, bottom surface at main valve body 3 is cast with outside control mouth X near the P oil port, casts out external control groove 11 at outside control mouth X near the place, bottom surface, and this external control groove 11 is connected with outside control mouth X.

As shown in Figure 3, Figure 4, make a step hole at the right-hand member of main valve body 3, aperture communicates with internal control groove 9 and external control groove 11.Screw thread is made in the aperture of aperture and macropore respectively.Aperture screw thread place dress conelet blocks up 10, and stifled 10 positions of conelet are located in the outer dead slot 11.Macropore screw thread place adorns big cone blocking 12.Conelet stifled 10 control oil outer for the time use, prevent from that the external control of coming in from the X mouth is oily to communicate with the fluid of P mouth.Big cone blocking 12 is blocked control oil, prevents outer seepage.

The main valve plug 4 of packing in the main valve hole 17, main valve plug 4 two ends shoot spring abutment 7 (as shown in Figure 5 and Figure 6), porose in the middle of this spring seat 7, the outside is the two-stage cylindrical, 4 through-flow grooves 15 are made in end at big cylindrical, as the oily path that enters main valve plug 4 two ends of control, and the pilot pressure oil active area when increasing main valve plug 4 startups, thereby under less control-oil pressure, start main valve plug 4, and after main valve plug 4 moves, have bigger area of passage to act on the ring surface.

Makes many grooves in the middle of the big cylindricals of main valve plug 4, corresponding with the groove of main valve body 3, the size of groove is according to different commutation functions and difference.Little cylindrical is made at main valve plug 4 two ends, and little cylindrical end face is circular stress surface 13, and the end face between big cylindrical and the little cylindrical forms annular stress surface 14.

Main valve body 3 two ends dress end cap 1 is equipped with seal ring 2 between end cap 1 and main valve body, also make the hole in this end cap 1, hole built-in spring 8, and these spring 8 one ends are against on the spring seat 7, and the other end is against on the end cap 1.

The utility model is shaped as the example explanation with spool shown in Figure 3 in use.

If control oil is outer for pattern, conelet stifled 10 is installed then.When the control oil bottom surface X mouth from main valve body 3 enters, arrive the top of main valve bodies 3 by external control groove 11, enter pilot valve 6 again, by the electromagnet 16 at pilot valve 6 two ends the dead electricity situation, decision has or not control oil, and control oil enters the A1 mouth or the B1 mouth of pilot valve.When two electromagnet 16 of pilot valve 6 all must not electricity, P, T, four hydraulic fluid ports of A, B were not connected.Get electric back control oil as some electromagnet of pilot valve 6 and enter the A1 mouth, then control oil enters the left end spring chamber of main valve plug 4 from left side inclined hole, action of hydraulic force is at circular stress surface 13, gap between the little cylindrical of the through-flow groove 15 by spring seat 7 and spring seat 7 and main valve plug 4 simultaneously, act on the annular stress surface 14, overcome the power of surging, the impacting force of frictional force and the right spring 8, promote main valve plug 4 be shifted to the right to run into end cap 1 till, P mouth and B mouth are connected, A mouth and T mouth are connected, and as electromagnet 16 dead electricity, then control oil is through pilot valve 6 oil sump tanks, main valve plug 4 left ends do not have the hydraulic coupling effect, and main valve plug 4 returns under the promotion of spring 8 on the right.In like manner, get electric back control oil as some electromagnet of pilot valve 6 and enter the B1 mouth, then control oil enters the right-hand member spring chamber of main valve plug 4 from the right inclined hole, action of hydraulic force is at circular stress surface 13, gap between the little cylindrical of the through-flow groove 15 by spring seat 7 and spring seat 7 and main valve plug 4 simultaneously, act on the annular stress surface 14, promote main valve plug 4 move left to run into end cap 1 till, P mouth and A mouth are connected, B mouth and T mouth are connected, and as electromagnet 16 dead electricity, then control oil is through pilot valve 6 oil sump tanks, main valve plug 4 right-hand members do not have the hydraulic coupling effect, return under the promotion of main valve plug 4 on the left side springs 8.

If supply pattern in the control oil, then do not have conelet and block up 10, control oil flows out to external control groove 11 from the P mouth, arrives the top of main valve body 3, enters pilot valve 6 again.All the other Principles of Process are the same.

By to the dress of conelet stifled 10 or tear open, can make things convenient for realize control oil outer for and the conversion of interior confession, do not need for supplying outward and two kinds of valve bodies are prepared in interior confession respectively.

Compared with prior art, control of the present utility model oil is outer, and designs simplification reduces cost, and reduces outer seepage link for easy with the conversion of interior confession, the spring reliability height that led, and main valve plug commutation breakout pressure is low, and the application adaptation of valve is wide.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (6)

1, electromagnetic pilot control selector valve comprises a main valve body that has pilot valve; Described main valve body inside is provided with main valve hole, is provided with main valve plug in the described main valve hole, is provided with spring and the end cap that covers main valve plug at the main valve plug two ends, and the bottom of described main valve body is provided with internal control groove and external control groove,
It is characterized in that,
Described internal control groove is the stepped ramp type hole, is provided with big cone blocking in the outside of internal control groove, is provided with little cone blocking in the inboard of internal control groove.
2, electromagnetic pilot control selector valve according to claim 1 is characterized in that described big cone blocking and little cone blocking are arranged on the internal control groove by screw thread, and the stifled position of described conelet is located in the outer dead slot.
3, electromagnetic pilot control selector valve according to claim 1, it is characterized in that, described main valve hole two ends are made as counterbore, and described main valve body inside is provided with two inclined holes of symmetry, and described pilot valve communicates with the counterbore at main valve hole two ends respectively by two inclined holes on the valve body.
4, electromagnetic pilot control selector valve according to claim 1 is characterized in that described main valve plug two ends are provided with spring seat, and described spring one end is against on the spring seat, and the other end is against on the end cap.
5, electromagnetic pilot control selector valve according to claim 4 is characterized in that, be provided with the hole that can be enclosed within on the main valve plug in the middle of the described spring seat, the spring seat outside is a two-stage step cylindrical, is provided with four through-flow grooves in big cylindrical bottom.
6, electromagnetic pilot according to claim 1 control selector valve is characterized in that, the parallel bottom surface with main valve body of described internal control groove, and described valve body bottom surface also is provided with outside control mouth, and described outside control mouth communicates by the external control groove with the internal control groove.
CN 200820154161 2008-10-17 2008-10-17 Electromagnetic pilot control changing-over valve CN201288712Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200820154161 CN201288712Y (en) 2008-10-17 2008-10-17 Electromagnetic pilot control changing-over valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200820154161 CN201288712Y (en) 2008-10-17 2008-10-17 Electromagnetic pilot control changing-over valve

Publications (1)

Publication Number Publication Date
CN201288712Y true CN201288712Y (en) 2009-08-12

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012119568A1 (en) * 2011-03-10 2012-09-13 湖南三一智能控制设备有限公司 Reversing valve having m type functionality
CN102829013A (en) * 2012-09-20 2012-12-19 宁波市镇海华力液压机电有限公司 Electromagnetic directional valve
CN103328870A (en) * 2011-02-01 2013-09-25 罗伯特·博世有限公司 Housing for a pressure-loaded component
WO2014173102A1 (en) * 2013-04-27 2014-10-30 浙江工业大学 Pre-tensioning-pre-twisting full-bridge 2d electro-hydraulic proportional directional valve
CN104196792A (en) * 2014-07-31 2014-12-10 红安安达新材料有限责任公司 Three-position four-way directional control valve
CN105332964A (en) * 2015-11-20 2016-02-17 燕山大学 Underwater electro-hydraulic directional valve
CN110094379A (en) * 2019-03-20 2019-08-06 合肥壹点通信息科技有限公司 A kind of hydraulic directional valve

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328870A (en) * 2011-02-01 2013-09-25 罗伯特·博世有限公司 Housing for a pressure-loaded component
CN103328870B (en) * 2011-02-01 2016-01-27 罗伯特·博世有限公司 The housing of the component of pressure-loaded
WO2012119568A1 (en) * 2011-03-10 2012-09-13 湖南三一智能控制设备有限公司 Reversing valve having m type functionality
CN102829013A (en) * 2012-09-20 2012-12-19 宁波市镇海华力液压机电有限公司 Electromagnetic directional valve
WO2014173102A1 (en) * 2013-04-27 2014-10-30 浙江工业大学 Pre-tensioning-pre-twisting full-bridge 2d electro-hydraulic proportional directional valve
US9970464B1 (en) 2013-04-27 2018-05-15 Zhejiang University Of Technology Pre-tensioning-pre-twisting full-bridge 2D electro-hydraulic proportional directional valve
CN104196792A (en) * 2014-07-31 2014-12-10 红安安达新材料有限责任公司 Three-position four-way directional control valve
CN105332964A (en) * 2015-11-20 2016-02-17 燕山大学 Underwater electro-hydraulic directional valve
CN105332964B (en) * 2015-11-20 2017-08-29 燕山大学 A kind of electro-hydraulic reversing valve under water
CN110094379A (en) * 2019-03-20 2019-08-06 合肥壹点通信息科技有限公司 A kind of hydraulic directional valve

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20090812

Termination date: 20161017