CN207229853U - A kind of efficient precursor overflow valve - Google Patents
A kind of efficient precursor overflow valve Download PDFInfo
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- CN207229853U CN207229853U CN201721107250.0U CN201721107250U CN207229853U CN 207229853 U CN207229853 U CN 207229853U CN 201721107250 U CN201721107250 U CN 201721107250U CN 207229853 U CN207229853 U CN 207229853U
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- main valve
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- precursor overflow
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Abstract
The utility model discloses a kind of efficient precursor overflow valve, the precursor overflow valve includes main valve body and pilot valve body, it is fixedly connected between main valve body and the pilot valve body by screw, main valve housing is equipped with the main valve body, main valve plug is equipped with the main valve housing, is equipped with guide valve bushing and pressure-regulating device in the pilot valve body, the pilot valve body bottom is equipped with shrinkage pool, the top of the main valve housing is located in shrinkage pool, is sealed between the main valve housing and shrinkage pool by radial sealing mechanism.The utility model is compact-sized, and leakproofness is greatly improved, and the response opened and closed is very fast.
Description
Technical field
It the utility model is related to field of hydraulic control, and in particular to a kind of efficient precursor overflow valve.
Background technology
Referring to Fig. 1, the inside of main valve body 1 ' of existing precursor overflow valve fills main valve housing 3 ', the outside of main valve housing 3 ' and main valve body
1 ' sealing is responsible for by sealing ring 16 ', is radial seal, and the sealing of the upper surface of main valve housing 3 ' and pilot valve body 4 ' is by sealing ring
11 ' are responsible for, and are axial seal, are connected by screw between main valve body 1 ' and pilot valve body 4 ', and when compression will offset sealing ring 11 '
Elastic force, actual thrust can reduce, and especially hold in high-pressure work under having shock loading between main valve body 1 ' and pilot valve body 4 '
Easy oil leakage.
In addition, the guide valve seat 8 ' of existing precursor overflow valve is cylindrical and 4 ' endoporus of pilot valve body is interference fit, so assemble
It need to be cooled down with liquid nitrogen, it is cumbersome.
In addition, being typically provided damping hole 7 ' on the sleeve 6 ' of existing precursor overflow valve, processing is inconvenient, sleeve 6 ' and pilot valve
The clearance fit of body 4 ', is blocked by elastic spring 5 ', and guide valve seat 8 ' is also blocked by elastic spring 9 ', and structure is more open.
In addition, existing precursor overflow valve is generally by spring 12 ', spring base 13 ', swivel nut 14 ', screw rod 15 ', pilot valve
The component decomposition pressure regulating device such as core 10 ', swivel nut 14 ' are arranged on the port of pilot valve body 4 ', and screw rod 15 ' passes through the position of swivel nut 14 '
In in 4 ' internal cavity of pilot valve body, and spring base 13 ' is arranged on the end of screw rod 15 ', and spring 12 ' is placed on spring base 13 ', is led
The one end of spool 10 ' is connected with spring 12 ', and the other end is connected with guide valve seat 8 ', and this structure considerably increases precursor overflow valve
Axial length, causes precursor overflow valve to use very inconvenient.
In addition, the main valve plug 2 ' of existing precursor overflow valve contacts sealing, the sound of opening and closing with main valve housing 3 ' for face
Should be slower.
Utility model content
The utility model to solve the above-mentioned problems, so as to provide a kind of efficient precursor overflow valve.
To reach above-mentioned purpose, the technical solution of the utility model is as follows：
A kind of efficient precursor overflow valve, the precursor overflow valve include main valve body and pilot valve body, the main valve body and lead
It is fixedly connected between valve body by screw, main valve housing is equipped with the main valve body, main valve plug is equipped with the main valve housing, it is described to lead
Guide valve bushing and pressure-regulating device are equipped with valve body, the pilot valve body bottom is equipped with shrinkage pool, and the top of the main valve housing is positioned at recessed
In hole, sealed between the main valve housing and shrinkage pool by radial sealing mechanism.
In a preferred embodiment of the utility model, the guide valve bushing is detachably positioned in entirely through screw thread leads
One end in valve body.
In a preferred embodiment of the utility model, damper and filter screen are equipped with the guide valve bushing.
In a preferred embodiment of the utility model, the pressure-regulating device include taper valve core, pressure spring,
Adjusting rod, elastic spring and nut, the adjusting rod is arranged on the other end in pilot valve body, and is fixed by nut, the tune
Spring cavity is equipped with pole, the pressure spring is arranged in spring cavity body, and the horizontal ends of the taper valve core are located at spring
In cavity, and it is connected with pressure spring, the tapering point of the taper valve core is directly contacted with guide valve bushing.
In a preferred embodiment of the utility model, the adjusting rod is equipped with limiting slot.
In a preferred embodiment of the utility model, the adjusting rod is equipped with seal groove, the seal groove
Inside it is equipped with the first sealing ring.
It is second close that several are equipped with a preferred embodiment of the utility model, between guide valve bushing and the pilot valve body
Seal.
In a preferred embodiment of the utility model, two radial seals are equipped between the main valve housing and main valve body
Enclose bar.
In a preferred embodiment of the utility model, line contact sealing knot is used between the main valve plug and main valve housing
Structure.
The beneficial effects of the utility model are：
The utility model is compact-sized, and leakproofness is greatly improved, and the response opened and closed is very fast.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram of existing precursor overflow valve；
Fig. 2 is the structure diagram of the utility model；
Fig. 3 is the structure diagram of the main valve housing in the utility model；
Fig. 4 is the structure diagram of the pilot valve body in the utility model；
Fig. 5 is the structure diagram of the guide valve bushing in the utility model；
Fig. 6 is the structure diagram of the adjusting rod in the utility model.
Embodiment
In order to make the technical means, creative features, achievable purpose and effectiveness that the utility model is realized easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
Referring to Fig. 2 to Fig. 6, efficient precursor overflow valve provided by the utility model, it includes main valve body 1 and pilot valve body 7,
It is fixedly connected between main valve body 1 and pilot valve body 7 by screw, main valve housing 3 is equipped with main valve body 1, main valve is equipped with main valve housing 3
Core 2, pilot valve body 7 is interior to be equipped with guide valve bushing 8 and pressure-regulating device.
It is fixedly connected between main valve body 1 and pilot valve body 7 by screw, and shrinkage pool 71 is equipped with 7 bottom of pilot valve body, and it is recessed
The opening diameter in hole 71 and 3 corresponding matching of main valve housing, the application extends the size of main valve housing 3, when main valve body 1 and pilot valve
When body 7 connects, the top of main valve housing 3 is located just in shrinkage pool 71, and there is small axial gap in the bottom hole face of shrinkage pool 71, with leading
Oil duct connection in valve body 7.Elastic spring groove 72 is equipped with 7 end face of pilot valve body, for installing elastic spring 18.
Sealed between main valve housing 3 and shrinkage pool 71 by radial sealing mechanism, radial sealing mechanism concretely seals
Circle 6.
In this way, since sealing ring 6 is set in the end that main valve housing 3 is located in shrinkage pool 71, when main valve body 1 and pilot valve body 7 connect
When connecing, sealing ring 6 is radial seal, rather than axial seal, and this avoid the counteracting of original axial seal sealing ring elastic force
The situation of screw in compression power, thus will not oil leak, improve leakproofness.
In addition, two radial direction seal ring bars 20 are equipped between main valve housing 3 and main valve body 1, so that the application seals
Property is more reliable.
Furthermore line contact sealing structure is used between the main valve plug 2 and main valve housing 3 in the application, so that the application
The response of opening and closing is all very fast.
The inside of pilot valve body 7 is hollow shape, and the side of cavity is equipped with screw thread inside it, and guide valve bushing 8 is entirely through spiral shell
Line is removably attached to the side in pilot valve body 7, is equipped with filter screen 10 and damper 11 in the guide valve bushing 8, on filter screen 10
Equipped with baffle ring 9, so that the guide valve bushing 8 in the application is an integral structure, and without setting guide valve seat, guide valve bushing 8 can
Directly contacted with pressure-regulating device, saved component so that precursor overflow valve is compact in structure and convenient to use.
In order to improve leakproofness, several second sealing rings are equipped between guide valve bushing 8 and pilot valve body 7, in this application
It is specific to set two, it is respectively the second sealing ring 12 and the second sealing ring 13.
Pressure-regulating device, it is arranged on the other end in pilot valve body 7, it includes taper valve core 14, pressure spring 17, adjusts
Pole 15, elastic spring 18 and nut 19.
Adjusting rod 15 is arranged on the other end in pilot valve body 7, and is fixed by nut 19, and spring is equipped with adjusting rod 15
Cavity, pressure spring 17 are arranged in spring cavity body, and the horizontal ends of taper valve core 14 are located in spring cavity body, and and pressure spring
17 are connected, the end contact of the tapering point of taper valve core 14 directly with guide valve bushing 8.
By said structure, the application eliminates swivel nut and spring base, and spring cavity is directly opened in adjusting rod
In 15, this substantially reduces precursor overflow valve axial length and reduce appearance and size.
Further, since the application uses the single pole structure of adjusting rod 15, adjusting rod 15 easily takes off when being positioned into pilot valve body 7
Go out, the application is equipped with limiting slot 151 on adjusting rod 15, elastic spring 18 is arranged with elastic spring groove 72, when adjusting rod 15
When being positioned into pilot valve body 7, elastic spring 18 can carry out adjusting rod 15 spacing, so can prevent adjusting rod 15 from deviating from.
Furthermore a seal groove 152 is additionally provided with adjusting rod 15, the first sealing ring is equipped with seal groove 152
16, the first sealing ring 16 can improve the leakproofness between adjusting rod 15 and pilot valve body 7.
Here is the concrete operating principle of the application：
The pressure of the pressure oil on A hydraulic fluid ports on main valve body 1 reaches pilot valve body by the passage of damper 21 and main valve body 1
7 passage, then 3 contained spring of main valve housing, 5 place cavity volume is reached by the passage of strainer 10, damper 11 and guide valve bushing 8, this pressure
Power closes main valve plug 2 plus the pressure of spring 5.Meanwhile pressure is acted also on above poppet valve core 14, when hydraulic fluid pressure is less than
During the power of pressure spring 17, poppet valve core 14 is closed, and when hydraulic fluid pressure is more than the power of pressure spring 17, poppet valve core 14 is opened,
Adjusted 15 inner passage of bar of guide's hydraulic oil reaches the inner passage of pilot valve body 7, then reaches main valve body to the passage of main valve body 1
B hydraulic fluid ports on 1, at this moment hydraulic oil produce pressure differential through damper 21 and damper 11 because flowing, make the lower section of main valve plug 2
Power be more than the power of top, this pressure differential overcomes the power of spring 5, opens main valve plug 2, and fluid flows to B hydraulic fluid ports from A hydraulic fluid ports, makes A
The pressure of pressure oil in hydraulic fluid port no longer rises, and plays the role of overflow valve.
And X hydraulic fluid ports are exterior control mouths, when the pressure of A hydraulic fluid ports is not reaching to regulator setting pressure, at the application
In closed mode, at this moment if X hydraulic fluid ports cut-in pressure is less than regulator setting pressure, there is pressure differential at 21 both ends of damper,
At this moment main valve plug 2 is opened, and fluid flows to B hydraulic fluid ports from A hydraulic fluid ports, plays the role of overflow valve.
The advantages of basic principle and main feature and the utility model of the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Simply illustrate the utility model principle, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed scope is defined by the appending claims and its equivalent thereof.
Claims (9)
1. a kind of efficient precursor overflow valve, the precursor overflow valve includes main valve body and pilot valve body, the main valve body and pilot valve
It is fixedly connected between body by screw, main valve housing is equipped with the main valve body, main valve plug, the pilot valve are equipped with the main valve housing
It is equipped with guide valve bushing and pressure-regulating device in vivo, it is characterised in that the pilot valve body bottom is equipped with shrinkage pool, the top of the main valve housing
End is sealed in shrinkage pool between the main valve housing and shrinkage pool by radial sealing mechanism.
2. a kind of efficient precursor overflow valve according to claim 1, it is characterised in that the guide valve bushing is entirely through spiral shell
Line is detachably positioned in one end in pilot valve body.
3. a kind of efficient precursor overflow valve according to claim 2, it is characterised in that damping is equipped with the guide valve bushing
Device and filter screen.
4. a kind of efficient precursor overflow valve according to claim 3, it is characterised in that the pressure-regulating device includes
Taper valve core, pressure spring, adjusting rod, elastic spring and nut, the adjusting rod is arranged on the other end in pilot valve body, and leads to
Cross nut to fix, be equipped with spring cavity in the adjusting rod, the pressure spring is arranged in spring cavity body, the taper valve core
Horizontal ends be located in spring cavity body, and be connected with pressure spring, the tapering point of the taper valve core is directly and guide valve bushing
Contact.
5. a kind of efficient precursor overflow valve according to claim 4, it is characterised in that the adjusting rod is equipped with spacing
Groove.
6. a kind of efficient precursor overflow valve according to claim 4, it is characterised in that the adjusting rod is equipped with sealing
Ring recess, the seal groove is interior to be equipped with the first sealing ring.
A kind of 7. efficient precursor overflow valve according to claim 2, it is characterised in that the guide valve bushing and pilot valve body it
Between be equipped with several second sealing rings.
A kind of 8. efficient precursor overflow valve according to claim 1, it is characterised in that the main valve housing and main valve body it
Between be equipped with two radial direction seal ring bars.
A kind of 9. efficient precursor overflow valve according to claim 1, it is characterised in that the main valve plug and main valve housing it
Between use line contact sealing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721107250.0U CN207229853U (en) | 2017-08-31 | 2017-08-31 | A kind of efficient precursor overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721107250.0U CN207229853U (en) | 2017-08-31 | 2017-08-31 | A kind of efficient precursor overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207229853U true CN207229853U (en) | 2018-04-13 |
Family
ID=61859972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721107250.0U Active CN207229853U (en) | 2017-08-31 | 2017-08-31 | A kind of efficient precursor overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207229853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489799A (en) * | 2017-08-31 | 2017-12-19 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
-
2017
- 2017-08-31 CN CN201721107250.0U patent/CN207229853U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489799A (en) * | 2017-08-31 | 2017-12-19 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
| CN107489799B (en) * | 2017-08-31 | 2023-11-03 | 上海立新液压有限公司 | Efficient guide overflow valve |
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