CN208719482U - A kind of direct acting stacked compression release valve - Google Patents
A kind of direct acting stacked compression release valve Download PDFInfo
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- CN208719482U CN208719482U CN201821170693.9U CN201821170693U CN208719482U CN 208719482 U CN208719482 U CN 208719482U CN 201821170693 U CN201821170693 U CN 201821170693U CN 208719482 U CN208719482 U CN 208719482U
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- pressure regulation
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Abstract
The utility model provides a kind of direct acting stacked compression release valve, pressure reducing valve includes: valve body, the spool being assemblied in body cavity, the successively steel ball of assembly connection from left to right from the right end of spool, spring base, pressure spring, pressure regulation plunger, pressure regulating screw, and it is fixed on the front cover of valve body front end, first through hole is set in front cover, for installing pressure regulating screw, if the second through-hole, for installing pressure regulation plunger and pressure spring, wherein pressure regulating screw is connected with pressure regulation plunger for floating is seperated, completely solve the problem for leading to not pressure regulation or pressure regulation difficulty because of concentricity difference；In addition, pass through being used cooperatively for positive and negative screw thread, when plus thread rotates counterclockwise into row decompression, the left-hand thread part of pressure regulating screw will not be screwed out, but pressure regulating screw forces that pressure regulation plunger is pulled to move right, it is depressurized to defined pressure minimum to realize, this configuration reduces the requirements of the inner hole roughness to pressure reducing valve front cover.
Description
Technical field
The utility model relates to pressure reducing valve field, in particular to a kind of direct acting stacked compression release valve and its assembly method.
Background technique
Pressure reducing valve be mainly used for realize voltage regulation function, have many advantages, such as structure it is simple, it is small in size, be widely used.Its work
It is, to push spool mobile, decompression valve outlet to be made to open big or reduce by pressure regulation ram compression pressure spring as principle；It is neglecting
Under the premise of slightly other resistances, the outlet pressure and spring force acted on spool balances each other, and reaches the hydraulic valve outlet pressure of control
Power remains constant.
In the prior art, direct acting stacked compression release valve mainly include valve body, spool, front cover, pressure spring, pressure regulation plunger and
Six part such as pressure regulating screw, pressure spring and pressure regulation plunger are mounted on pressure reducing valve front cover inner hole, and rotation pressure regulating screw can make to adjust
Hydraulic plunger is mobile in front cover inner hole, and makes pressure regulation ram compression pressure spring, and spring pushes spool, to control decompression valve outlet
Pressure.Wherein, pressure regulation plunger and pressure regulating screw can be there are two types of structures:
As shown in Figure 1, pressure regulation plunger and pressure regulating screw are structure as a whole: the advantages of this structure is to facilitate control pressure regulation plunger
Moved in the hole of front cover, the roughness requirements of device to hole are not high and manufacture easy to process, the disadvantage is that being exchanged during pressure regulation
The concentricity of hydraulic plunger and pressure regulating screw is more demanding, process and assemble is difficult, easily leads to pressure regulation resistance becomes larger, and adjusts when serious
Hydraulic plunger is stuck can not the significant problems such as pressure regulation.
As shown in Fig. 2, pressure regulation plunger and pressure regulating screw are separate structure: this structure be on the basis of the first structure into
Capable improvement, solve the problems, such as it is demanding to the concentricity of integral structure, but when being easy to appear pressure regulation plunger and being moved in hole,
Because frictional resistance is too big, and the technical issues of pressure reducing valve pressure cannot be made to be reduced to 0 or defined minimum initial pressure, and to decompression
The inside surface roughness of valve front cover inner hole is more demanding, need to use the higher lathe of machining accuracy, and processing cost is high, difficulty is high.
Summary of the invention
To solve the technical problems existing in the prior art, the utility model provides a kind of pressure reducing valve, by pressure reducing valve front cover
The pressure regulation plunger and pressure regulating screw of inner hole installation are designed as the split type structure of floating connection, to reduce pressure regulation plunger and pressure regulation
The concentricity requirement of screw, reduces the machining accuracy of pressure regulation plunger and pressure regulating screw and the machining accuracy of pressure reducing valve front cover inner wall.
Direct acting stacked compression release valve described in the utility model includes with flowering structure:
Valve body, the spool being assemblied in body cavity, from the right end of spool from left to right successively the steel ball of assembly connection,
Spring base, pressure spring, pressure regulation plunger, pressure regulating screw, and it is fixed on the front cover of valve body front end, first through hole is set in front cover,
For installing pressure regulating screw, if the second through-hole, for installing pressure regulation plunger and pressure spring, which is characterized in that the pressure regulation spiral shell
Nail, which is that floating is seperated with the pressure regulation plunger, to be connected.
Further realize that the structure for floating seperated connection includes: that internal screw thread is equipped in the first through hole, it is described
Pressure regulating screw is successively arranged the first external screw thread linkage section, polished rod, the second external screw thread linkage section, the connection of the first external screw thread from right to left
The diameter of the diameter > polished rod of diameter > the second external screw thread linkage section of section, the first external screw thread linkage section are connect with the second external screw thread
The thread rotary orientation of section between the first external screw thread linkage section and first through hole on the contrary, be threadedly coupled；The right end of the pressure regulation plunger from
Right-to-left is successively arranged internal thread hole and undercut, the outer diameter of internal diameter > the second external screw thread linkage section of undercut, undercut
The length of length > the second external screw thread linkage section, the second external screw thread linkage section screw in undercut by internal thread hole.
Preferably, the external screw thread of the first external screw thread linkage section is plus thread, the second external screw thread linkage section it is outer
Screw thread is left-hand thread.
Further, design has the groove of installation sealing ring on the excircle of the pressure regulation plunger, so as to from left end to tune
When hydraulic plunger applies pressure, sealing ring plays the role of preventing the hydraulic fluid leak of front cover inner hole left end to right end.
Further, for convenience of rotation pressure regulating screw, knob is installed in the rightmost side of pressure regulating screw.The skill of the utility model
Art effect is:
1. the utility model is due to pressure regulating screw and adjusts with pressure regulating screw compared with the scheme that pressure regulation plunger is structure as a whole
Hydraulic plunger is floating connection, using the gap between them, can be fully solved following technical problem: (1) because of pressure regulating screw and tune
Between hydraulic plunger there are concentricity is poor or first through hole and the second through-hole between that there are concentricities is poor, cause pressure regulation plunger
Resistance is very big or even pressure regulation plunger is stuck when moving in two through-holes causes pressure regulating screw that can not rotate in the second through-hole, finally
It cannot achieve pressure regulation；(2) because between pressure regulating screw and pressure regulation plunger there are concentricity is poor or first through hole and the second through-hole between
It is poor that there are concentricities, causes pressure regulating screw and the integral structure of pressure regulation plunger that can not be assembled in the pilot hole of pressure reducing valve front cover.
2. the utility model solves following technology and asks with pressure regulating screw compared with pressure regulation plunger is completely seperated scheme
Topic: (1) when separate structure pressure regulating screw rotates decompression counterclockwise, pressure regulating screw does not exchange hydraulic plunger and enforces pulling force, pressure regulation
Plunger leans on the compression of pressure spring to push completely and realizes movement, when the decrement of pressure spring is smaller and smaller, pressure regulation plunger
Thrust is also smaller and smaller, and when thrust cannot overcome the frictional force between pressure regulation plunger and the second through-hole, pressure regulation plunger stops moving
It is dynamic, cause the outlet pressure of pressure reducing valve not to be down to 0 or defined minimum initial pressure completely；(2) prior art is in order to reduce
Frictional force between pressure regulation plunger and the second through-hole must then improve the finish of the second through-hole, improve machining accuracy, thus
Difficulty of processing is increased, and improves the requirement on machining accuracy of equipment.The utility model is due to the first external screw thread linkage section and
The thread rotary orientation of two external screw thread linkage sections on the contrary, when pressure reducing valve depressurizes, revolve by the direction oppositely oriented to the first external screw thread linkage section
Turn pressure regulating screw, pressure regulating screw drives pressure regulation plunger to move right, until pressure regulation plunger motion to most end, realizes that pressure reducing valve is complete
Full release.
Detailed description of the invention
Fig. 1 is the structure of relief pressure valve schematic diagram that pressure regulating screw and pressure regulation plunger are structure as a whole in the prior art；
Fig. 2 is that in the prior art, pressure regulating screw is completely seperated structure of relief pressure valve schematic diagram with pressure regulation plunger；
Fig. 3 is the structure of relief pressure valve schematic diagram in embodiment one；
Fig. 4 is the structural schematic diagram of pressure reducing valve front cover in embodiment one；
Fig. 5 is the structural schematic diagram of pressure regulation plunger in embodiment one；
Fig. 6 is the structural schematic diagram of pressure regulating screw in embodiment one；
Wherein, 1. valve body, 2. front covers, 3. pressure regulation plungers, 4. sealing rings, 5. pressure regulating screws, 6. pressure springs, 7. grooves,
8. spring base, 9. spools, 10. rear covers, 12. steel balls, 11. first through hole, 21. second through-holes, 31. internal thread holes, 32. empty knives
Slot, 51. first external screw thread linkage sections, 52. polished rods, 53. second external screw thread linkage sections.
Specific embodiment
With reference to the accompanying drawing, the embodiments of the present invention is specifically described.
Embodiment one
As shown in Figures 3 to 6, a kind of direct acting stacked compression release valve, structure include: valve body 1, are assemblied in body cavity
Spool 9, from the right end of spool from left to right successively the steel ball 12 of assembly connection, spring base 8, pressure spring 6, pressure regulation plunger 3,
Pressure regulating screw 5, and it is fixed on the front cover 2 of valve body front end, first through hole 11 is set in front cover 2, for installing pressure regulating screw 5, if
Second through-hole 21 is equipped with internal screw thread for installing pressure regulation plunger 3 and pressure spring 6 in first through hole 11, pressure regulating screw 5 is from the right side
It is successively arranged the first external screw thread linkage section 51, polished rod 52, the second external screw thread linkage section 53 to a left side, the first external screw thread linkage section 51
The diameter of the diameter > polished rod 52 of the second external screw thread of diameter > linkage section 53, the external screw thread of the first external screw thread linkage section 51 are positive spiral shell
Line, the external screw thread of the second external screw thread linkage section 53 are left-hand thread, screw thread between the first external screw thread linkage section 51 and first through hole 11
Connection, the right end of pressure regulation plunger 3 are successively arranged internal thread hole 31 and undercut 32, the internal diameter > second of undercut 32 from right to left
The outer diameter of external screw thread linkage section 53, the length of the second external screw thread of length > linkage section 53 of undercut 32, the connection of the second external screw thread
Section 53 screws in undercut 32 by internal thread hole 31, and design has the groove 7 of installation sealing ring 4 on the excircle of pressure regulation plunger 3,
The rightmost side of pressure regulating screw 5 is installed by knob (not illustrating in figure).
The specific assembly method of the pressure reducing valve is as follows: after installing sealing ring 4 into the groove 7 of pressure regulation plunger 3, then by pressure regulation
Plunger 3 is fitted into the second through-hole 21 in pressure reducing valve front cover, pressure regulating screw 5 is inserted into first through hole 11, dextrorotation pressure regulating screw
5, until the second external screw thread linkage section 53 is moved at the internal thread hole 31 of pressure regulation plunger, at this point, the first external screw thread linkage section 51
The optical axis length for screwing out internal screw thread in first through hole 11 is greater than or equal to the length of internal thread hole 31, then opposite direction rotates pressure regulation spiral shell
Nail 5, the second external screw thread linkage section 53 screw in the internal thread hole 31 of pressure regulation plunger, until entering the undercut 32 of pressure regulation plunger
It is interior.Due to the diameter of the diameter > polished rod 52 of the second external screw thread of diameter > linkage section 53 of the first external screw thread linkage section 51, and it is empty
The outer diameter of the second external screw thread of internal diameter > linkage section 53 of cutter groove 32, the length of the second external screw thread of length > linkage section 53 of undercut 32
Degree, so being floating connection between pressure regulation plunger 3 and pressure regulating screw 5, rather than is fixedly connected.
When work, pressure regulating screw 5 is rotated clockwise, the first external screw thread linkage section 5 of pressure regulating screw 5 screws in first through hole 11
In, end face of the first external screw thread linkage section 51 at polished rod 52 will withstand the right side of pressure regulation plunger, make pressure regulation plunger 3 to
It moves left, pressure regulation plunger 3 pushes pressure spring 6 to make its compression, and pressure spring 6 pushes decompression valve core to make to depressurize valve outlet pressure
Increase.When rotation pressure regulating screw 5 counterclockwise, because the second external screw thread linkage section 53 of pressure regulating screw 3 is left-hand thread, adjust
Pressure screw 5 will not be screwed out from the internal thread hole 31 of pressure regulation plunger 3, while being exchanged hydraulic plunger 3 and being enforced pulling force, and pressure regulation column is made
Plug 3 moves right, and reduces the decrement of pressure spring 6 slowly, and spool is mobile, to reach effect of easing stress, until pressure drop
For 0 or defined minimum initial pressure.
When disassembly, front cover 2 is dismantled from valve body 1 first, then rotates clockwise pressure regulating screw 5, is allowed to push pressure regulation column
Plug 3 is moved to the left until the first external screw thread 51 back-out first through hole 11 completely, divides pressure regulation plunger 3 and pressure regulating screw 5 with front cover 2
From, then fixed pressure regulation plunger 3, pressure regulating screw 5 is rotated clockwise, the second external screw thread linkage section 53 is made to screw out the second through-hole 31, it is real
The separation of existing pressure regulation plunger 3 and pressure regulating screw 5.
Above disclosures are merely preferred embodiments of the utility model, the utility model cannot be limited with this certainly
Interest field, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and according to this reality
The equivalent variations made by novel claim, still belongs to the scope covered by the invention.
Claims (5)
1. a kind of direct acting stacked compression release valve, comprising: valve body (1), the spool (9) being assemblied in valve body (1) inner cavity, from spool
(9) right end rise from left to right successively the steel ball (12) of assembly connection, spring base (8), pressure spring (6), pressure regulation plunger (3),
Pressure regulating screw (5), and it is fixed on the front cover (2) of valve body front end, first through hole (11) are set in front cover (2), for installing pressure regulation
Screw (5), if the second through-hole (21), for installing pressure regulation plunger (3) and pressure spring (6), which is characterized in that the pressure regulation spiral shell
It follows closely (5) and is connected with the pressure regulation plunger (3) for floating is seperated.
2. direct acting stacked compression release valve as described in claim 1, which is characterized in that realize the structure of the seperated connection of floating
Include:
Internal screw thread is equipped in the first through hole (11)；
The pressure regulating screw (5) is successively arranged the first external screw thread linkage section (51), polished rod (52), the second external screw thread from right to left and connects
Connect section (53), the diameter > polished rod (52) of diameter > the second external screw thread linkage section (53) of the first external screw thread linkage section (51) it is straight
The thread rotary orientation of diameter, the first external screw thread linkage section (51) and the second external screw thread linkage section (53) is on the contrary, the first external screw thread linkage section
(51) it is threadedly coupled between first through hole (11)；
The right end of the pressure regulation plunger (3) is successively arranged internal thread hole (31) and undercut (32), undercut (32) from right to left
Internal diameter > the second external screw thread linkage section (53) outer diameter, the length of length > the second external screw thread linkage section (53) of undercut (32)
Degree, the second external screw thread linkage section (53) screw in undercut (32) by internal thread hole (31).
3. direct acting stacked compression release valve as claimed in claim 2, which is characterized in that the first external screw thread linkage section (51)
External screw thread is plus thread, and the external screw thread of the second external screw thread linkage section (53) is left-hand thread.
4. direct acting stacked compression release valve as claimed in claim 1 or 2, which is characterized in that the excircle of the pressure regulation plunger (3)
It is upper to design the groove (7) for having installation sealing ring (4).
5. direct acting stacked compression release valve as claimed in claim 1 or 2, which is characterized in that the end of institute pressure regulating screw (5) rightmost side
Portion is equipped with knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170693.9U CN208719482U (en) | 2018-07-24 | 2018-07-24 | A kind of direct acting stacked compression release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170693.9U CN208719482U (en) | 2018-07-24 | 2018-07-24 | A kind of direct acting stacked compression release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208719482U true CN208719482U (en) | 2019-04-09 |
Family
ID=65974679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821170693.9U Active CN208719482U (en) | 2018-07-24 | 2018-07-24 | A kind of direct acting stacked compression release valve |
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| Country | Link |
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| CN (1) | CN208719482U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825835A (en) * | 2018-07-24 | 2018-11-16 | 银川市长城液压有限责任公司 | A kind of direct acting stacked compression release valve |
| CN108825835B (en) * | 2018-07-24 | 2024-04-19 | 银川市长城液压有限责任公司 | Direct-acting superposition type pressure reducing valve |
-
2018
- 2018-07-24 CN CN201821170693.9U patent/CN208719482U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825835A (en) * | 2018-07-24 | 2018-11-16 | 银川市长城液压有限责任公司 | A kind of direct acting stacked compression release valve |
| CN108825835B (en) * | 2018-07-24 | 2024-04-19 | 银川市长城液压有限责任公司 | Direct-acting superposition type pressure reducing valve |
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