CN209041099U - A kind of relief valve for air-driven hydraulic pump - Google Patents
A kind of relief valve for air-driven hydraulic pump Download PDFInfo
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- CN209041099U CN209041099U CN201821800074.3U CN201821800074U CN209041099U CN 209041099 U CN209041099 U CN 209041099U CN 201821800074 U CN201821800074 U CN 201821800074U CN 209041099 U CN209041099 U CN 209041099U
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- relief valve
- valve
- hydraulic pump
- release
- air
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Abstract
The utility model relates to hydraulic pump technical fields, specifically a kind of relief valve for air-driven hydraulic pump, the inner cavity of the relief valve is provided with upper cavity and lower chamber, the upper cavity and lower chamber are interconnected, relief valve valve rod is equipped in the upper cavity, release valve seat is installed in the lower chamber, limiting slot is provided on the outer housing of the lower chamber, the release valve seat is in that chimeric shape is mounted on the outer housing inner wall of lower chamber by limiting slot, the inner cavity of the release valve seat is provided with relief valve, pivot pin is equipped at the top of the relief valve, the pivot pin is located at the underface of relief valve valve rod, the intracavity bottom of the relief valve is provided with release valve core, the tapered structure design of the release valve core, the vertex of a cone position of the release valve core and the bottom end of pivot pin fit.The application compares the prior art, and original surface contact structure is changed to contact structure, to effectively eliminate the phenomenon of leakage, improves the homework precision of relief valve.
Description
Technical field
The utility model relates to hydraulic pump technical field, specifically a kind of relief valve for air-driven hydraulic pump.
Background technique
Hydraulic pump is the intermediate necessary dynamical system for connecting hydraulic oil container and hydraulic cylinder, and hydraulic pump is by the liquid in hydraulic oil container
Pressure oil pressurization is pumped in hydraulic cylinder, to realize the lift process of hydraulic cylinder.Hydraulic pump can be divided by driving method difference
Electric hydraulic pump and two kinds of air-driven hydraulic pump.
Lower air pressure is converted into high pressure oil by air-driven hydraulic pump, i.e., is generated using the low pressure of large area piston end
The height at small area piston end is hydraulic.It can replace manually or electrically hydraulic pump and anchor cable tensioning machine tool, move back windlass, rockbolt tension meter
Or other hydraulic tools match.
In order to ensure hydraulic cylinder can smoothly reset, air-driven hydraulic pump is generally configured with back liquid function.When hydraulic cylinder needs again
When position, the hydraulic oil in hydraulic cylinder can be back in hydraulic oil container by the relief valve of air-driven hydraulic pump.Existing relief valve is adopted
With the structure of valve seat cooperation steel ball, there is a situation where that easy leakage, precision are low, pressure value is unstable.
Utility model content
The purpose of this utility model is to provide a kind of relief valves for air-driven hydraulic pump, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions:
A kind of relief valve for air-driven hydraulic pump, the inner cavity of the relief valve is provided with upper cavity and lower chamber, described
Upper cavity and lower chamber are interconnected, and relief valve valve rod is equipped in the upper cavity, is equipped with relief valve in the lower chamber
, limiting slot is provided on the outer housing of the lower chamber, the release valve seat is in that chimeric shape is mounted on cavity of resorption by limiting slot
On the outer housing inner wall of body, the inner cavity of the release valve seat is provided with relief valve, and pivot pin, institute are equipped at the top of the relief valve
The underface that pivot pin is located at relief valve valve rod is stated, the intracavity bottom of the relief valve is provided with release valve core, the relief valve
The tapered structure of spool designs, and the vertex of a cone position of the release valve core and the bottom end of pivot pin fit.
As a further solution of the present invention: crushing block is installed on the relief valve valve rod, the relief valve valve rod
Lower section be wound with the first compressed spring, the top of first compressed spring and the lower surface of crushing block are bonded in squeezing, institute
The top setting for stating release valve seat is fluted, and the bottom end of first compressed spring limits in groove.
As a further solution of the present invention: ring groove is provided on the outer wall of the crushing block, it is described ring-like
Gap is formed between groove and the side wall for discharging valve insertion, the first O-ring is arranged in the ring groove.
As a further solution of the present invention: being equipped with axle envelope, the relief valve at the top of the release valve insertion
It installs and limits in axle envelope inner cavity in the top of valve rod.
As a further solution of the present invention: it is synchronously arranged with annular cavity on the outer wall of the release valve seat, institute
It states and forms gap between annular cavity and the side wall for discharging valve insertion, be arranged with supporting bead and the in the annular cavity respectively
Two O-rings.
As a further solution of the present invention: the bottom of the release valve insertion is provided with holding screw, it is described tight
Determine to be provided with the second compressed spring, the top of second compressed spring and relief valve between screw and the gap for discharging valve core
Spool fits, and the bottom end of second compressed spring fits with holding screw.
It is wound with third compressed spring on the outer wall of the holding screw as a further solution of the present invention,
The top of the third compressed spring is bonded with the bottom squeeze of relief valve, the bottom end of the third compressed spring and relief valve
Bottom interior wall squeezes fitting.
Compared with prior art, the utility model has the beneficial effects that the application compares the prior art, the prior art is adopted
Valve seat cooperates the sealing structure of steel ball, the spool and valve seat coordinating operation of pyramidal structure is changed to, from original face contact
Structure is changed to contact structure, to effectively eliminate the phenomenon of leakage, and the homework precision of relief valve is improved, into one
The stability of pressure value when step ensure that relief valve operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1- relief valve valve rod, 2- axle envelope, the first O-ring of 3-, the first compressed spring of 4-, 5- pivot pin, 6- relief valve
Seat, 7- supporting bead, the second O-ring of 8-, 9- relief valve, 10- release valve core, the second compressed spring of 11-, 12- holding screw,
13- third compressed spring, 14- crushing block.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one:
Referring to Fig. 1, a kind of relief valve for air-driven hydraulic pump, the inner cavity of the relief valve is provided with upper cavity under
Cavity, the upper cavity and lower chamber are interconnected, and relief valve valve rod 1, the release valve insertion are equipped in the upper cavity
Top axle envelope 2 is installed, the top of the relief valve valve rod 1 is installed and is limited in 2 inner cavity of axle envelope.Peace in the lower chamber
Equipped with release valve seat 6, limiting slot is provided on the outer housing of the lower chamber, the release valve seat 6 is by limiting slot in chimeric
Shape is mounted on the outer housing inner wall of lower chamber, and crushing block 14 is installed on the relief valve valve rod 1, the relief valve valve rod 1
Lower section is wound with the first compressed spring 4, and the top of first compressed spring 4 is bonded with the lower surface of crushing block 14 in extruding,
The top setting of the release valve seat 6 is fluted, and the bottom end of first compressed spring 4 limits in groove.
The inner cavity of the release valve seat 6 is provided with relief valve 9, and the top of the relief valve 9 is equipped with pivot pin 5, the axis
Pin 5 is located at the underface of relief valve valve rod 1, and the intracavity bottom of the relief valve 9 is provided with release valve core 10, the relief valve
The tapered structure of spool 10 designs, and the vertex of a cone position of the release valve core 10 and the bottom end of pivot pin 5 fit.State relief valve
The bottom of inner cavity is provided with holding screw 12, is provided with the second pressure between the holding screw 12 and the gap for discharging valve core 10
Contracting spring 11, top and the release valve core 10 of second compressed spring 11 fit, the bottom of second compressed spring 11
End fits with holding screw 12.Third compressed spring 13, the third compression are wound on the outer wall of the holding screw 12
The top of spring 13 is bonded with the bottom squeeze of relief valve 9, in the bottom end of the third compressed spring 13 and the bottom of relief valve
Wall squeezes fitting.
The transmission mechanism of the external outside of the relief valve valve rod 1 generally uses foot-operated transmission mechanism, when operation, pushes
Foot-operated transmission mechanism so that relief valve valve rod 1 be driven to push, and then drives pivot pin 5 to push, to drive release valve core again
10 push, and move downward to separate with 9 phase of relief valve to discharge valve core 10, then form asphalt channel；It continues to
Lower surging, so that the split tunnel width of release valve core 10 and relief valve 9 increases；Oil liquid from the oilhole of relief valve bottom into
Enter, flow from the bottom to top, flows to the hydraulic fluid port of relief valve upper end two sides；It is subsequent to unclamp again foot-operated transmission mechanism after release,
No longer apply downward pressure to relief valve valve rod 1, each component completes release process by spring automatic reset.
The application compares the prior art, and the sealing structure for the valve seat cooperation steel ball that the prior art is used is changed to taper
The spool and valve seat coordinating operation of structure, are changed to contact structure from original surface contact structure, to effectively eliminate leakage
Liquid phenomenon, and the homework precision of relief valve is improved, the stability of pressure value when further ensuring relief valve operation.
Embodiment two:
The present embodiment is advanced optimized as embodiment one, on its basis, is arranged on the outer wall of the crushing block 14
There is a ring groove, form gap between the ring groove and the side wall for discharging valve insertion, the is arranged in the ring groove
One O-ring 3.Annular cavity, the side of the annular cavity and release valve insertion are synchronously arranged on the outer wall of the release valve seat 6
Gap is formed between wall, is arranged with supporting bead 7 and the second O-ring 8 in the annular cavity respectively.
When operation, using the supporting bead structure of O-ring and annular, so that the effect of dynamic sealing is played, section knot
Structure is extremely simple, and has self sealing action, and sealing performance is reliable；And there is modular size, therefore installation and replacement are all very
It is easy.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of relief valve for air-driven hydraulic pump, the inner cavity of the relief valve is provided with upper cavity and lower chamber, it is described on
Cavity and lower chamber are interconnected, and are equipped with relief valve valve rod (1) in the upper cavity, are equipped with relief valve in the lower chamber
Seat (6), limiting slot is provided on the outer housing of the lower chamber, and the release valve seat (6) is in that chimeric shape is installed by limiting slot
On the outer housing inner wall of lower chamber, which is characterized in that the inner cavity of release valve seat (6) is provided with relief valve (9), described to release
It puts and is equipped with pivot pin (5) at the top of valve (9), the pivot pin (5) is located at the underface of relief valve valve rod (1), the relief valve (9)
Intracavity bottom be provided with release valve core (10), it is described release valve core (10) tapered structure design, the relief valve
The vertex of a cone position of spool (10) and the bottom end of pivot pin (5) fit.
2. the relief valve according to claim 1 for air-driven hydraulic pump, which is characterized in that the relief valve valve rod (1)
The lower section of upper installation crushing block (14), the relief valve valve rod (1) is wound with the first compressed spring (4), the first compression bullet
The top of spring (4) is bonded with the lower surface of crushing block (14) in extruding, and fluted, institute is arranged in the top of release valve seat (6)
The bottom end for stating the first compressed spring (4) limits in groove.
3. the relief valve according to claim 2 for air-driven hydraulic pump, which is characterized in that outside the crushing block (14)
It is provided with ring groove on wall, forms gap between the ring groove and the side wall for discharging valve insertion, in the ring groove
It is arranged with the first O-ring (3).
4. the relief valve according to claim 1 for air-driven hydraulic pump, which is characterized in that push up the inner cavity of the relief valve
Portion is equipped with axle envelope (2), and the top of the relief valve valve rod (1) is installed and limited in axle envelope (2) inner cavity.
5. the relief valve according to claim 2 for air-driven hydraulic pump, which is characterized in that release valve seat (6)
It is synchronously arranged with annular cavity on outer wall, forms gap, the annular between the annular cavity and the side wall for discharging valve insertion
Supporting bead (7) and the second O-ring (8) are arranged in cavity respectively.
6. the relief valve according to claim 1 for air-driven hydraulic pump, which is characterized in that the interior bottom of chamber of the relief valve
Portion is provided with holding screw (12), is provided with the second compression between the holding screw (12) and the gap for discharging valve core (10)
Spring (11), top and release valve core (10) of second compressed spring (11) fit, second compressed spring
(11) bottom end fits with holding screw (12).
7. the relief valve according to claim 6 for air-driven hydraulic pump, which is characterized in that the holding screw (12)
It is wound on outer wall third compressed spring (13), the top of the third compressed spring (13) and the bottom squeeze of relief valve (9)
The bottom end of fitting, the third compressed spring (13) is bonded with the extruding of the bottom interior wall of relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821800074.3U CN209041099U (en) | 2018-10-22 | 2018-10-22 | A kind of relief valve for air-driven hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821800074.3U CN209041099U (en) | 2018-10-22 | 2018-10-22 | A kind of relief valve for air-driven hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209041099U true CN209041099U (en) | 2019-06-28 |
Family
ID=67039098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821800074.3U Active CN209041099U (en) | 2018-10-22 | 2018-10-22 | A kind of relief valve for air-driven hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209041099U (en) |
-
2018
- 2018-10-22 CN CN201821800074.3U patent/CN209041099U/en active Active
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