CN204628681U - A kind of piston type super-low voltage reduction valve - Google Patents
A kind of piston type super-low voltage reduction valve Download PDFInfo
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- CN204628681U CN204628681U CN201420827123.8U CN201420827123U CN204628681U CN 204628681 U CN204628681 U CN 204628681U CN 201420827123 U CN201420827123 U CN 201420827123U CN 204628681 U CN204628681 U CN 204628681U
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- relief valve
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Abstract
The utility model relates to a kind of piston type low-pressure relief valve, comprise relief valve body, in described relief valve body inner chamber, spool is installed, this spool neutral position arranges a groove, one end of its groove is set to conical structure, this conical structure outer end connects one section of cylindrical body, is in the relief valve body arranged outside high-pressure inlet of this spool groove side, and in this high-pressure inlet, level inserts cylindrical body; The outer wall of described relief valve body wherein side offers a drain tap, a piston cavity is set in relief valve body inside, described cylindrical body outer end fixed installation piston apparatus; The utility model beneficial effect is: when there being pressure oil, spool is pushed open by oil pressure, pressure oil also acts on piston apparatus simultaneously, be increased in the active force to spool under the low-pressure of pole, thus cracking pressure can be made lower, accurate voltage regulating can be carried out to oil hydraulic circuit being low to moderate within the scope of 0.5MPa ~ 0.005MPa.
Description
Technical field
The utility model relates to a kind of valve, particularly relates to a kind of piston type super-low voltage reduction valve of accurate voltage regulating under the low-pressure of pole.
Background technique
Reduction valve is by regulating outlet pressure inlet pressure being reduced to a certain needs, and relies on the energy of medium itself, makes the valve that outlet pressure keeps stable automatically.From hydromechanical viewpoint, reduction valve is the throttle element that a local resistance can change, namely by changing orifice size, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, thus reach the object of decompression, then rely on the adjustment of control and regulation system, the fluctuation of downstream pressure and spring force are balanced each other, makes downstream pressure keep constant in certain margin of error.Fluid pressure higher for pipeline before valve can be reduced to the level after valve needed for pipeline by it, be widely used in the too high region of tall building, city water-supply pipe network hydraulic pressure, mine and other occasions, to ensure that in water supply system, each water spot obtains suitable service hydraulic pressure and flow.
The structural type of reduction valve is a lot, common are diaphragm type, inner spring piston type etc. in the past; The action principle of reduction valve reduces hydraulic pressure by valve inner flow passage to the local resistance of current, and the scope that hydraulic pressure falls is regulated automatically by the import and export differential water pressures of the film or piston both sides that connect flap.
This case it is important to note that, for the structure of above reduction valve, on the basis keeping shell and each assembly existing, its structure is improved, namely usually our hydraulic pressure relief valve regulation pressure used, at more than 0.5MPa, when needs regulate pressure at below 0.1MPa, has not had reduction valve that can be practical to accomplish, need to adopt the external valve of complicated method or import costliness to replace, just there is no ready-made reduction valve to select when particularly pressure is more low to moderate 0.01MPa.Therefore, for above aspect, need reasonably to improve prior art.
Model utility content
For above defect, the utility model provides a kind of piston type super-low voltage reduction valve, makes it can carry out accurate voltage regulating to oil hydraulic circuit, to solve many deficiencies of prior art being low to moderate within the scope of 0.5MPa ~ 0.005MPa.
For achieving the above object, the utility model is by the following technical solutions:
A kind of low pressure piston formula surpasses reduction valve, and comprise relief valve body, install spool in described relief valve body inner chamber, this spool neutral position arranges a groove, and one end of its groove is set to conical structure, and this conical structure outer end connects one section of cylindrical body;
The outer wall of described relief valve body wherein side offers a high-pressure inlet P1, in this high-pressure inlet P1, level inserts cylindrical body, arrange a piston cavity in relief valve body inside, described cylindrical body outer end fixed installation piston apparatus, piston cavity is wherein communicated with high-pressure inlet P1;
Offer handle installing hole outside described relief valve body, spool arranges spring and this outer spring end is connected to regulating handle inner end, this regulating handle inner end is inserted in handle installing hole.
Described conical structure outer end links the relief valve body arranged outside relief outlet P2 of one section of cylindrical body side;
Correspondingly, the side being in relief outlet P2 arranges a pressure oil path be connected with piston apparatus rear portion, and the neutral position being positioned at pressure oil path arranges a throttle orifice;
When there being pressure oil, spool is pushed open by oil pressure, and simultaneously pressure oil also acts on piston apparatus, is increased in the active force to spool under the low-pressure of pole, thus cracking pressure can be made lower.
Drain tap L is offered in described relief valve body outside.
The beneficial effect of piston type low-pressure relief valve described in the utility model is: when there being pressure oil, spool is pushed open by oil pressure, pressure oil also acts on piston apparatus simultaneously, be increased in the active force to spool under the low-pressure of pole, thus cracking pressure can be made lower, accurate voltage regulating can be carried out to oil hydraulic circuit being low to moderate within the scope of 0.5MPa ~ 0.005MPa.
Accompanying drawing explanation
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the structural representation of piston type low-pressure relief valve described in the utility model embodiment.
In figure:
1, relief valve body; 2, regulating handle; 3, spool; 4, spring; 5, piston apparatus; 6, throttle orifice.
Embodiment
As shown in Figure 1, piston type super-low voltage reduction valve described in the utility model embodiment, comprise relief valve body 1, in described relief valve body 1 inner chamber, spool 3 is installed, this spool 3 neutral position arranges a groove, one end of its groove is set to conical structure, this conical structure outer end connects one section of cylindrical body, be in the relief valve body 1 arranged outside high-pressure inlet P1 of this spool groove side, be in the relief valve body 1 arranged outside relief outlet P2 of one section of cylindrical body side that this conical structure outer end connects, in this oil inlet hole, level inserts spool;
Correspondingly, the outer wall of described relief valve body 1 wherein side offers a high-pressure inlet P1, arranges a piston cavity in relief valve body 1 inside, described cylindrical body outer end fixed installation piston apparatus 5, piston cavity is wherein communicated with high-pressure inlet P1;
Correspondingly, arrange a pressure oil path between the side of the relief outlet P2 of described reducing valve body 1 and piston apparatus 5, described pressure oil path neutral position arranges a throttle orifice;
Correspondingly, offer handle installing hole outside described relief valve body 1, spool 3 is arranged spring 4 and this spring 4 outer end is connected to regulating handle 2 inner end, this regulating handle 2 inner end is inserted in handle installing hole;
Correspondingly, described piston apparatus 5 outer surface is adjacent to piston cavity internal face; When there being pressure oil, spool 3 is pushed open by oil pressure, and simultaneously pressure oil also acts on piston apparatus 5, is increased in the active force to spool 3 under the low-pressure of pole, thus cracking pressure can be made lower; In addition, a drain tap L is offered in piston cavity outside.
The above-mentioned description to embodiment can understand and apply this case technology for the ease of those skilled in the art, person skilled in the art obviously can make various amendment to these examples easily, and General Principle described herein is applied in other embodiment and need not through performing creative labour.Therefore, this case is not limited to above embodiment, and those skilled in the art is according to the announcement of this case, and the improvement made for this case and amendment all should in the protection domains of this case.
Claims (5)
1. a piston type super-low voltage reduction valve, comprises relief valve body (1), it is characterized in that:
Install spool (3) in described relief valve body (1) inner chamber, this spool (3) neutral position arranges a groove, and one end of its groove is set to conical structure, and this conical structure outer end connects one section of cylindrical body;
The outer wall of described relief valve body (1) wherein side offers a high-pressure inlet, in this high-pressure inlet, level is inserted cylindrical body and is arranged a piston cavity in relief valve body (1) inside, described cylindrical body outer end fixed installation piston apparatus (5), piston cavity is wherein communicated with high-pressure inlet;
Valve body (1) arranged outside relief outlet is sent out in described decompression, wherein arrange a pressure oil path between the side of relief outlet and piston apparatus (5), and position is provided with throttle orifice (6) therebetween.
2. piston type super-low voltage reduction valve according to claim 1, is characterized in that: relief valve body (1) the arranged outside relief outlet being in one section of cylindrical body side that this conical structure outer end connects.
3. piston type super-low voltage reduction valve according to claim 1, it is characterized in that: when there being pressure oil, spool (3) is pushed open by oil pressure, pressure oil also acts on piston apparatus (5) simultaneously, be increased in the active force to spool (3) under the low-pressure of pole, thus cracking pressure can be made lower.
4. piston type super-low voltage reduction valve according to claim 1, is characterized in that: drain tap is offered in described relief valve body (1) outside.
5. piston type super-low voltage reduction valve according to claim 1, it is characterized in that: handle installing hole is offered in described relief valve body (1) outside, spool (3) is arranged spring (4) and this spring (4) outer end is connected to regulating handle (2) inner end, this regulating handle (2) inner end is inserted in handle installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827123.8U CN204628681U (en) | 2014-12-10 | 2014-12-10 | A kind of piston type super-low voltage reduction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827123.8U CN204628681U (en) | 2014-12-10 | 2014-12-10 | A kind of piston type super-low voltage reduction valve |
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| Publication Number | Publication Date |
|---|---|
| CN204628681U true CN204628681U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420827123.8U Active CN204628681U (en) | 2014-12-10 | 2014-12-10 | A kind of piston type super-low voltage reduction valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576367A (en) * | 2022-03-11 | 2022-06-03 | 中铁工程装备集团有限公司 | Logic control valve for different fluid media and control method thereof |
-
2014
- 2014-12-10 CN CN201420827123.8U patent/CN204628681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576367A (en) * | 2022-03-11 | 2022-06-03 | 中铁工程装备集团有限公司 | Logic control valve for different fluid media and control method thereof |
| CN114576367B (en) * | 2022-03-11 | 2024-03-22 | 中铁工程装备集团有限公司 | Logic control valve for different fluid media and control method thereof |
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