CN104196794A - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
- Publication number
- CN104196794A CN104196794A CN201410372410.9A CN201410372410A CN104196794A CN 104196794 A CN104196794 A CN 104196794A CN 201410372410 A CN201410372410 A CN 201410372410A CN 104196794 A CN104196794 A CN 104196794A
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- China
- Prior art keywords
- piston
- pressure
- damping cavity
- cavity
- damping
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Abstract
The invention belongs to the field of hydraulic equipment, and particularly relates to a pressure reducing valve. The pressure reducing valve comprises a valve body with an inner cavity, the inner cavity is communicated with a high pressure inlet and a low pressure outlet, and a piston assembly which is matched with the inner cavity is arranged in the inner cavity. The piston assembly comprises a first piston and a second piston, the first piston and the second piston are connected through a piston rod, the first piston is placed nearby the high pressure inlet, and the second piston is placed nearby the low pressure outlet. The piston assembly divides the inner cavity into a first damping cavity, a flow guide cavity and a second damping cavity. A spring which is connected with the first piston and is coaxial with the piston rod is arranged in the first damping cavity, and the second damping cavity is communicated with the low pressure outlet through a damping channel. The pressure reducing valve is simple in structure, output pressure is stable, oil cutoff can be avoided, and reliability is high.
Description
Technical field
The invention belongs to hydraulic equipment field, be specially a kind of reduction valve.
Background technique
Reduction valve is by regulating, inlet pressure being reduced to the outlet pressure of a certain needs, and rely on the energy of medium itself, makes outlet pressure automatically keep stable valve.From hydromechanical viewpoint, reduction valve is a throttle element that local resistance can change, and by changing orifice size, the kinetic energy of flow velocity and fluid is changed, and causes the different pressure losses, thereby reaches the object of decompression.Current reduction valve is on the market various.
Summary of the invention
The object of the invention is to, a kind of reduction valve is provided, when decompression, realize the technique effect of voltage stabilizing.
For realizing above-mentioned technical purpose, scheme provided by the invention is: a kind of reduction valve, comprise the valve body with inner chamber, this inner chamber is communicated with high pressure entry and low tension outlet, the piston assembly that in described inner chamber, setting adapts with it, this piston assembly comprises the first piston and the second piston that are connected by piston rod, first piston is positioned near high pressure entry, the second piston is positioned near low tension outlet, inner chamber is separated into the first damping cavity by piston assembly, diversion cavity and the second damping cavity, in the first damping cavity, arrange and be connected with first piston and the spring coaxial with piston rod, the second damping cavity is communicated with low tension outlet by damping road.
And, the duct axially with connection the first damping cavity and the second damping cavity of described piston assembly, described the first damping cavity is communicated with the pressure-releasing chamber in valve body with drain tap, and limiting mechanism of pressure is set in pressure-releasing chamber.
And described limiting mechanism of pressure comprises the valve and the limit plunger that are connected by spring, valve is placed in the connecting port place of pressure-releasing chamber and the first damping cavity, and limit plunger adapts with pressure-releasing chamber and contacts with the voltage regulation screw that stretches into pressure-releasing chamber, and voltage regulation screw is connected with valve body screw thread.
The present invention is simple in structure, and delivery pressure is stable, not oil-break, and reliability is high.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Wherein, 1, valve body, 2, high pressure entry, 3, low tension outlet, 4, the first damping cavity, 5, diversion cavity, 6, the second damping cavity, 7, pressure-releasing chamber, 8, damping road, 9, first piston, 10, the second piston, 11, piston rod, 12, spring, 13, valve, 14, limit plunger, 15, spring, 16, voltage regulation screw, 17, drain tap, 18, duct.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present embodiment provides a kind of reduction valve, comprise the valve body 1 with inner chamber, this inner chamber is communicated with high pressure entry 2 and low tension outlet 3, the piston assembly that in described inner chamber, setting adapts with it, this piston assembly comprises the first piston 9 and the second piston 10 that are connected by piston rod 11, first piston 9 is positioned near high pressure entry 2, the second piston 10 is positioned near low tension outlet 3, inner chamber is separated into the first damping cavity 4 by piston assembly, diversion cavity 5 and the second damping cavity 6, the interior setting of the first damping cavity 4 is connected with first piston 9 and the spring 12 coaxial with piston rod 11, the second damping cavity 6 is communicated with low tension outlet 3 by damping road 8.
Further, the duct 18 axially with connection the first damping cavity 4 and the second damping cavity 6 of above-mentioned piston assembly, described the first damping cavity 4 is communicated with the pressure-releasing chamber 7 in valve body 1 with drain tap 17, the interior limiting mechanism of pressure that arranges of pressure-releasing chamber 7.
Further, above-mentioned limiting mechanism of pressure comprises the valve 13 and the limit plunger 14 that are connected by spring 15, valve 13 is placed in the connecting port place of pressure-releasing chamber 7 and the first damping cavity 4, and limit plunger 14 adapts with pressure-releasing chamber 7 and contacts with the voltage regulation screw 16 that stretches into pressure-releasing chamber 7, and voltage regulation screw 16 is threaded with valve body 1.
When the present embodiment work, high pressure oil enters inner chamber by high pressure entry 2, and under the guiding of diversion cavity 5, high pressure oil pushing tow the second piston 10 moves to the direction of extruding the second damping cavity 6, to expand the relief space between diversion cavity 5 and low tension outlet 3.Now, along with the movement of piston assembly, there is elastic strain and produce the pulling force that overcomes piston assembly continuation movement in the spring 12 in the first damping cavity 4, thereby realizes first step voltage stabilizing.A part enters the second damping cavity 6 to the mobile hydraulic oil of relief outlet 3 under the guiding in damping road 8, the second piston 10 is applied certain making every effort to overcome and takes the second piston 10 and continue to the movement of extruding the second damping cavity 6, realizes second step voltage stabilizing.Release that superfluous pressure oil is directed to the first damping cavity 4 in the axial duct 18 of piston assembly, to reduce the resistance in the second damping cavity 6, ensures the relief space between diversion cavity 5 and low tension outlet 3.Pressure in the first damping cavity 4 arrives to a certain degree, hydraulic oil will promote valve 13 and enter into pressure-releasing chamber 7, and then discharges valve body 1 from drain tap 17, and 15, spring is to provide jacking force for valve 13, with the unlatching size of control valve, thus control valve body internal pressure.And the initial deformation that the application of force size of spring 15 promotes limit plunger 14 restraining springs 15 self by voltage regulation screw 16 determines.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvement or distortion, these improvement or distortion also should be considered as protection scope of the present invention.
Claims (3)
1. a reduction valve, comprise the valve body with inner chamber, this inner chamber is communicated with high pressure entry and low tension outlet, it is characterized in that: the piston assembly that in described inner chamber, setting adapts with it, this piston assembly comprises the first piston and the second piston that are connected by piston rod, first piston is positioned near high pressure entry, the second piston is positioned near low tension outlet, inner chamber is separated into the first damping cavity by piston assembly, diversion cavity and the second damping cavity, in the first damping cavity, arrange and be connected with first piston and the spring coaxial with piston rod, the second damping cavity is communicated with low tension outlet by damping road.
2. a kind of reduction valve according to claim 1, it is characterized in that: the duct axially with connection the first damping cavity and the second damping cavity of described piston assembly, described the first damping cavity is communicated with the pressure-releasing chamber in valve body with drain tap, and limiting mechanism of pressure is set in pressure-releasing chamber.
3. a kind of reduction valve according to claim 2, it is characterized in that: described limiting mechanism of pressure comprises the valve and the limit plunger that are connected by spring, valve is placed in the connecting port place of pressure-releasing chamber and the first damping cavity, limit plunger adapts with pressure-releasing chamber and contacts with the voltage regulation screw that stretches into pressure-releasing chamber, and voltage regulation screw is connected with valve body screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372410.9A CN104196794A (en) | 2014-07-31 | 2014-07-31 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372410.9A CN104196794A (en) | 2014-07-31 | 2014-07-31 | Pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104196794A true CN104196794A (en) | 2014-12-10 |
Family
ID=52082137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410372410.9A Pending CN104196794A (en) | 2014-07-31 | 2014-07-31 | Pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104196794A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829714A (en) * | 2017-09-27 | 2018-03-23 | 刘玉友 | A kind of unidirectional tubing string continuous directional valve of oil production by layer and method |
| CN113786539A (en) * | 2021-08-19 | 2021-12-14 | 深圳市国赛生物技术有限公司 | Syringe device with overvoltage protection function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000113A (en) * | 2006-12-01 | 2007-07-18 | 华中科技大学 | Middle and high pressure guiding type water pressure reducing valve |
| CN201144914Y (en) * | 2007-12-29 | 2008-11-05 | 上海立新液压有限公司 | Pilot type pressure reducing valve |
| DE102008044800A1 (en) * | 2008-08-28 | 2010-03-04 | Robert Bosch Gmbh | Pilot-controlled pressure control valve, particularly pressure shut-off valve, pressure relief valve or pressure reducing valve, comprises master valve with master piston and pilot valve, where master piston is pre-stressed by spring |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN204003723U (en) * | 2014-07-31 | 2014-12-10 | 红安安达新材料有限责任公司 | A kind of reduction valve |
-
2014
- 2014-07-31 CN CN201410372410.9A patent/CN104196794A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000113A (en) * | 2006-12-01 | 2007-07-18 | 华中科技大学 | Middle and high pressure guiding type water pressure reducing valve |
| CN201144914Y (en) * | 2007-12-29 | 2008-11-05 | 上海立新液压有限公司 | Pilot type pressure reducing valve |
| DE102008044800A1 (en) * | 2008-08-28 | 2010-03-04 | Robert Bosch Gmbh | Pilot-controlled pressure control valve, particularly pressure shut-off valve, pressure relief valve or pressure reducing valve, comprises master valve with master piston and pilot valve, where master piston is pre-stressed by spring |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN204003723U (en) * | 2014-07-31 | 2014-12-10 | 红安安达新材料有限责任公司 | A kind of reduction valve |
Non-Patent Citations (2)
| Title |
|---|
| 吴根茂,等: "《新编实用电液比例技术》", 30 September 2006, 浙江大学出版社 * |
| 阎俊霞,等: "《液压识图》", 30 September 2013, 湖南科技大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829714A (en) * | 2017-09-27 | 2018-03-23 | 刘玉友 | A kind of unidirectional tubing string continuous directional valve of oil production by layer and method |
| CN113786539A (en) * | 2021-08-19 | 2021-12-14 | 深圳市国赛生物技术有限公司 | Syringe device with overvoltage protection function |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141210 |