CN204553391U - Leading type manual multi-stage pressure regulating relief valve group - Google Patents
Leading type manual multi-stage pressure regulating relief valve group Download PDFInfo
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- CN204553391U CN204553391U CN201520242507.8U CN201520242507U CN204553391U CN 204553391 U CN204553391 U CN 204553391U CN 201520242507 U CN201520242507 U CN 201520242507U CN 204553391 U CN204553391 U CN 204553391U
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Abstract
The utility model discloses a kind of leading type manual multi-stage pressure regulating relief valve group, comprise relief valve main valve, hand-operated direction valve and multiple pilot valve, relief valve main valve comprises: have the first inner chamber and the first valve body with the first filler opening of the first inner space, the first return opening, connection mouth; And the first spool be arranged in the first inner chamber, connection mouth and the first return opening disconnect by it, and it has the damp channel be communicated with connection mouth by the first filler opening; Hand-operated direction valve comprises: have the second inner chamber and the second valve body with the filler opening of the second inner space, the second drain tap, multiple output oil port, filler opening is directly communicated with the connection mouth of reduction valve main valve; And the second spool be arranged in the second inner chamber; Multiple pilot valve comprises respectively: the 3rd valve body with the 3rd inner chamber; And the poppet valve core be arranged in the 3rd inner chamber; The ante-chamber of multiple pilot valve respectively one_to_one corresponding is directly communicated with the output oil port of hand-operated direction valve.It makes hydraulic system more stable, reliable, and efficiency is higher.
Description
Technical field
The utility model relates to relief valve, is specifically related to leading type manual multi-stage pressure regulating relief valve group.
Background technique
Relief valve be in Hydraulic Equipment one extremely important and must be not few hydraulic element, overflow and the voltage-regulation voltage-stabilization of hydraulic system can be realized.
In the course of the work, different times changes because of target equipment, and load will change, and the pressure needed for hydraulic system also will change thereupon, and namely system needs to realize multi-stage pressure regulating.
Mostly traditional hydraulic system multi-stage pressure regulating is that forming pressure-control circuit by a pilot operated compound relief valve and several direct-acting overflow valve, selector valve etc. realizes pressure regulation.Needed for this voltage regulating mode, hydraulic element are many, and loop is long, add the risk of system failure, the stability of a system and reliability decrease.Meanwhile, because loop is many, too increase the pressure loss of hydraulic system, reduce the efficiency of hydraulic system.
Summary of the invention
The technical problems to be solved in the utility model is, a kind of leading type manual multi-stage pressure regulating relief valve group is provided, applies it, the defects such as existing pressure regulation form hydraulic element are many, loop long, hydraulic system fault has a big risk can be solved, make hydraulic system more stable, reliable, efficiency is higher.
In order to solve the problems of the technologies described above, the utility model adopts following technical proposals.
A kind of leading type manual multi-stage pressure regulating relief valve group, comprises relief valve main valve, hand-operated direction valve and multiple pilot valve,
Described relief valve main valve comprises:
First valve body of the first filler opening that there is the first inner chamber and be communicated with respectively with described first inner chamber, the first return opening, connection mouth; And
Be arranged at first spool that also described first filler opening can be communicated with described first return opening or disconnect in described first inner chamber, described connection mouth and described first return opening disconnect by it, and it has the damp channel be communicated with described connection mouth by described first filler opening;
Described hand-operated direction valve comprises:
Second valve body of the second filler opening that there is the second inner chamber and be communicated with respectively with described second inner chamber, the second return opening, multiple output oil port, wherein, described second filler opening is directly communicated with described connection mouth; And
Be arranged at second spool that also described second filler opening can be communicated with respectively with each output oil port described or disconnect in described second inner chamber;
Described multiple pilot valve comprises respectively:
There is the 3rd valve body of the 3rd inner chamber; And
To be arranged in described 3rd inner chamber and the 3rd inner chamber to be separated into the poppet valve core of ante-chamber and back cavity;
Wherein, the ante-chamber of the plurality of pilot valve respectively one_to_one corresponding be directly communicated with the output oil port of described hand-operated direction valve.
Described second filler opening and described connection mouth are coordinated by seam and are communicated with.
The ante-chamber of described pilot valve and the corresponding output oil port of described hand-operated direction valve are coordinated by seam and are communicated with.
Described relief valve main valve also comprises one end and is connected to described first spool and the other end stretches into described connection mouth and is connected to the first elastic component of described second valve body.
Described first elastic component is spring.
Described multiple pilot valve also comprises respectively:
One end is stretched in described back cavity and the other end stretches out the adjustable lever outside described 3rd valve body; And
Be connected to the pressure regulation elastic component between described poppet valve core and described adjustable lever.
Described pressure regulation elastic component is spring.
The return opening of first and second return opening described and described pilot valve is interconnected.
First, second and third valve body described is made separately.
The utility model has following Advantageous Effects.
The connection mouth of relief valve main valve of the present utility model be directly communicated with the second filler opening of hand-operated direction valve and the ante-chamber of multiple pilot valve respectively one_to_one corresponding be directly communicated with the output oil port of hand-operated direction valve, adopt this structure, decrease the hydraulic element needed for hydraulic system, the loop of hydraulic system is short, reduce the out of order risk of hydraulic system, make hydraulic system more stable, reliably, simultaneously, because loop is short, also reduce the pressure loss of hydraulic system, the efficiency of hydraulic system is higher, and can select flexibly according to on-the-spot actual demand and required relief valve model is installed, fast, efficiently, cost is low, efficiency is high, there is good application prospect.
Accompanying drawing explanation
Fig. 1 is the exploded view of the utility model preferred embodiment.
Embodiment
For can technical characteristics of the present utility model and effect be described in detail, and can realize according to the content of this specification, below in conjunction with accompanying drawing, mode of execution of the present utility model be further illustrated.
Fig. 1 illustrates a kind of leading type of the present utility model manual multi-stage pressure regulating relief valve group, comprise relief valve main valve 1, hand-operated direction valve 2 and four pilot valve 3(wherein two not shown in FIG).
Relief valve main valve 1 comprises the first valve body 11, first spool 12 and the first elastic component 13.The first oil inlet P 1, first oil return inlet T 1, connection mouth 113 that first valve body 11 has the first inner chamber 111 and is communicated with respectively with the first inner chamber 111, first valve body 11 is also provided with the first return opening interface 112 be connected with the first oil return inlet T 1, wherein, connection mouth 113 is recess.First spool 12 is arranged in the first inner chamber 111 and also the first oil inlet P 1 can be communicated with the first oil return inlet T 1 or disconnects, connection mouth 113 and the first oil return inlet T 1 disconnect by the first spool 12 simultaneously, first spool 12 has damping hole 121, first oil inlet P 1 is communicated with connection mouth 113 by this damp channel 121, the bottom of the first spool 12 is sealedly connected with technique plug 14 towards with the first inner chamber 111, seal ring 15 is provided with oil-leakage-prevention between the position that this technique plug 14 contacts with the first inner chamber 111, the cavity that this damp channel 121 also surrounds with the cavity of technique plug 14 with bottom cavity 114(i.e. first spool 12 lower end surface of the first spool 12) be communicated with.The damping hole 121 of pressure oil on the first spool 12 from the first oil inlet P 1 passes into the bottom of the first spool 12, and when input pressure hour, the first oil inlet P 1 and the first oil return inlet T 1 disconnect, not oil spilling; When input pressure is elevated to certain value, the first oil inlet P 1 is communicated with the first oil return inlet T 1, and spill valve main valve 1 starts overflow.First elastic component 13 one end is connected to the first spool 12 and the other end stretches into connection mouth 113, and the first elastic component 13 can be but be not limited to spring.
Hand-operated direction valve 2 comprises the second valve body 21 and the second spool 22.Second valve body 21 there is the second inner chamber 211 and the second oil inlet P 2, five the second oil return inlet T 2(of being communicated with respectively with the second inner chamber 211 wherein two not shown in FIG), four output oil ports 212,213,214,215, wherein, the outer wall corresponding site of second valve body 21 at the second oil inlet P 2 place has the tang suitable with the recess of connection mouth 113, coordinate to make forming seam between this tang and the recess of connection mouth 113, thus the second oil inlet P 2 is directly communicated with connection mouth 113.Second spool 22 is arranged in the second inner chamber 211 and also the second oil inlet P 2 can be communicated with respectively with each output oil port 212,213,214,215 or disconnects.
Four pilot valves 3 comprise the 3rd valve body 31 with the 3rd inner chamber 311, poppet valve core 32, pressure regulation elastic component 33, valve seat 34, adjustable lever 35 and the adjusting nut 36 be arranged in the 3rd inner chamber 311 respectively.Poppet valve core 32 to be arranged in the 3rd inner chamber 311 and to coordinate with valve seat 34 and the 3rd inner chamber 311 is separated into ante-chamber 3111 and back cavity 3112, and back cavity 3112 is communicated with the oil return inlet T 3 of this pilot valve 3.One end of adjustable lever 35 to stretch in back cavity 3112 and its other end to stretch out the 3rd valve body 31 outer and be resisted against adjusting nut 36, adjusting nut 36 is combined on the 3rd valve body 31, and rotating adjusting nut 36 can make adjustable lever 35 along self axial direction to-and-fro motion.Pressure regulation elastic component 33 is connected between poppet valve core 32 and adjustable lever 35, and pressure regulation elastic component 33 can be but be not limited to spring.Wherein, 3rd valve body 31 also has the passage 312 be communicated with ante-chamber 3111, the passage 312 difference one_to_one corresponding of these four pilot valves 3 and the output oil port 212,213,214,215 of hand-operated direction valve 2 are coordinated by seam and are directly communicated with, thus are connected with the output oil port 212,213,214,215 of hand-operated direction valve 2 by the ante-chamber 3111 of pilot valve 3.
The oil return inlet T 3 of first and second oil return inlet T 1, T2 and pilot valve 3 above-mentioned is interconnected.
Working principle of the present utility model (off-load and level Four pressure regulation) is as following.
When hand-operated direction valve 2 is in meta (0), fluid is entered by the first oil inlet P 1 of relief valve main valve 1, enter in hand-operated direction valve 2 by the second oil inlet P 2 of damping hole 121, hand-operated direction valve 2 successively, the second oil return inlet T 2 then successively through being connected with the first return opening interface 112 of relief valve main valve 1, the first oil return inlet T 1 of relief valve main valve 1 directly flow back to fuel tank off-load.
When hand-operated direction valve 2 is in left 1, fluid is entered by the first oil inlet P 1 of relief valve main valve 1, enter in hand-operated direction valve 2 by the second oil inlet P 2 of damping hole 121, hand-operated direction valve 2 successively, flowing through output oil port 214 hole by the commutation oilhole d on the second spool 22 of hand-operated direction valve 2 enters in the right back pilot valve 3(Fig. 1 of Fig. 1 not shown), now, the pressure of hydraulic system is set up by the pilot valve 3 that Fig. 1 is right back.
When hand-operated direction valve 2 is in left 2, fluid is entered by the first oil inlet P 1 of relief valve main valve 1, enter in hand-operated direction valve 2 by the second oil inlet P 2 of damping hole 121, hand-operated direction valve 2 successively, the pilot valve 3 that output oil port 213 enters Fig. 1 upper right is flowed through by the commutation oilhole c on the second spool 22 of hand-operated direction valve 2, now, the pressure of hydraulic system is set up by the pilot valve 3 of Fig. 1 upper right.
When hand-operated direction valve 2 is in right 1, fluid is entered by the first oil inlet P 1 of relief valve main valve 1, enter in hand-operated direction valve 2 by the second oil inlet P 2 of damping hole 121, hand-operated direction valve 2 successively, flowing through output oil port 215 by the commutation oilhole a on the second spool 22 of hand-operated direction valve 2 enters in the left back pilot valve 3(Fig. 1 of Fig. 1 not shown), now, the pressure of hydraulic system is set up by the pilot valve 3 that Fig. 1 is left back.
When hand-operated direction valve 2 is in right 2, fluid is entered by the first oil inlet P 1 of relief valve main valve 1, enter in hand-operated direction valve 2 by the second oil inlet P 2 of damping hole 121, hand-operated direction valve 2 successively, the pilot valve 3 that output oil port 212 enters Fig. 1 upper left is flowed through by the commutation oilhole b on the second spool 22 of hand-operated direction valve 2, now, the pressure of hydraulic system is set up by the pilot valve 3 of Fig. 1 upper left.
Above-mentioned hand-operated direction valve 2 manually reversing handle 23 adjusts.
It should be pointed out that first, second and third valve body 11,21,31 above-mentioned adopts Split type structure, rear installation is in aggregates, but does not get rid of first, second and third valve body 11,21,31 and be made into integration.The quantity of above-mentioned pilot valve 3, hand-operated direction valve 2 path is not particular value, can also be other quantity according to on-the-spot actual demand.
It should be noted that, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any applicable mode.In order to avoid unnecessary repetition, the utility model is no longer described various possible compound mode.
Being described in detail the utility model above with reference to embodiment, is illustrative and not restrictive, in the change do not departed under the utility model general plotting and amendment, all within protection domain of the present utility model.
Claims (9)
1. a leading type manual multi-stage pressure regulating relief valve group, comprises relief valve main valve, hand-operated direction valve and multiple pilot valve, it is characterized in that,
Described relief valve main valve comprises:
First valve body of the first filler opening that there is the first inner chamber and be communicated with respectively with described first inner chamber, the first return opening, connection mouth; And
Be arranged at first spool that also described first filler opening can be communicated with described first return opening or disconnect in described first inner chamber, described connection mouth and described first return opening disconnect by it, and it has the damp channel be communicated with described connection mouth by described first filler opening;
Described hand-operated direction valve comprises:
Second valve body of the second filler opening that there is the second inner chamber and be communicated with respectively with described second inner chamber, the second return opening, multiple output oil port, wherein, described second filler opening is directly communicated with described connection mouth; And
Be arranged at second spool that also described second filler opening can be communicated with respectively with each output oil port described or disconnect in described second inner chamber;
Described multiple pilot valve comprises respectively:
There is the 3rd valve body of the 3rd inner chamber; And
To be arranged in described 3rd inner chamber and the 3rd inner chamber to be separated into the poppet valve core of ante-chamber and back cavity;
Wherein, the ante-chamber of the plurality of pilot valve respectively one_to_one corresponding be directly communicated with the output oil port of described hand-operated direction valve.
2. leading type according to claim 1 manual multi-stage pressure regulating relief valve group, is characterized in that, described second filler opening and described connection mouth are coordinated by seam and be communicated with.
3. leading type according to claim 1 manual multi-stage pressure regulating relief valve group, is characterized in that, the ante-chamber of described pilot valve and the corresponding output oil port of described hand-operated direction valve are coordinated by seam and be communicated with.
4. leading type according to claim 1 manual multi-stage pressure regulating relief valve group, is characterized in that, described relief valve main valve also comprises one end and is connected to described first spool and the other end stretches into described connection mouth and is connected to the first elastic component of described second valve body.
5. leading type according to claim 4 manual multi-stage pressure regulating relief valve group, is characterized in that, described first elastic component is spring.
6. leading type according to claim 1 manual multi-stage pressure regulating relief valve group, is characterized in that, described multiple pilot valve also comprises respectively:
One end is stretched in described back cavity and the other end stretches out the adjustable lever outside described 3rd valve body; And
Be connected to the pressure regulation elastic component between described poppet valve core and described adjustable lever.
7. leading type according to claim 6 manual multi-stage pressure regulating relief valve group, is characterized in that, described pressure regulation elastic component is spring.
8. the manual multi-stage pressure regulating relief valve of the leading type according to any one of claim 1 to 7 group, is characterized in that, the return opening of first and second return opening described and described pilot valve is interconnected.
9. the manual multi-stage pressure regulating relief valve of the leading type according to any one of claim 1 to 7 group, is characterized in that, first, second and third valve body described is made separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520242507.8U CN204553391U (en) | 2015-04-21 | 2015-04-21 | Leading type manual multi-stage pressure regulating relief valve group |
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| CN201520242507.8U CN204553391U (en) | 2015-04-21 | 2015-04-21 | Leading type manual multi-stage pressure regulating relief valve group |
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| CN204553391U true CN204553391U (en) | 2015-08-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704286A (en) * | 2017-02-28 | 2017-05-24 | 中冶华天南京工程技术有限公司 | Two-stage pressure switching overflow valve |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704286A (en) * | 2017-02-28 | 2017-05-24 | 中冶华天南京工程技术有限公司 | Two-stage pressure switching overflow valve |
| CN106704286B (en) * | 2017-02-28 | 2018-05-18 | 中冶华天南京工程技术有限公司 | The overflow valve of two stage pressures switching |
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