CN2031045U - Governing valve - Google Patents
Governing valve Download PDFInfo
- Publication number
- CN2031045U CN2031045U CN 88201233 CN88201233U CN2031045U CN 2031045 U CN2031045 U CN 2031045U CN 88201233 CN88201233 CN 88201233 CN 88201233 U CN88201233 U CN 88201233U CN 2031045 U CN2031045 U CN 2031045U
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- CN
- China
- Prior art keywords
- valve
- cylinder body
- reduction
- pressure
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a governing valve used to control the flow quantity for hydraulic transmission systems. The governing valve is composed of three parts, that is a throttling device, a pressure relief device and a cylinder body controlling device. The index of the performance is that the minimum flow quantity is 0.025 liters / minute, the maximum flow quantity is more than 10 liters / minute, and the pressure is more than 5-63 kgf/m+[2]. The dynamic quality is that the governing valve eliminates the flow quantity overshoot of starting, ensuring the smooth starting of the oil cylinder, achieving the speed of the work feed, eliminating the jump speed phenomenon, and ensuring the producing quality, the precision and the lifetime of the equipment.
Description
The utility model belongs to flow control element.
For a long time, about the design of series flow control valve, generally adopt Fixed differential reducing valve open in usual to add this conventional principle of throttle valve both at home and abroad and design.Adopt the series flow control valve of this structural principle design, because of reduction valve often leaves, when starting work, instantaneous pressure is added on the throttle valve, so produced a very big instantaneous flow, makes oil cylinder produce speed kick phenomenon, the poor stability of oil cylinder low speed has influenced quality of processing and life of equipment.
The utility model has adopted the Normally closed type Fixed differential reducing valve to add the new structure principle design of throttle valve at above-mentioned deficiency, and instantaneous flow over control when having eliminated startup has realized the stable control of low speed.
The utility model includes throttling arrangement, decompressor and control cylinder body device.Throttling arrangement is made up of adjusting handle, adjustable lever, adjustment cover, throttle valve spool and throttle valve spring; Decompressor is made up of positioning rod, pressure-relief valve spring, reduction valve spool and reduction valve valve pocket; With contacting of cylinder body the annular space is arranged between the end face at the reduction valve valve pocket, the oil duct of in-line pressure oil by the reduction valve valve pocket flows in this annular space and enters inner chamber of cylinder block.On the cylinder body damping hole can be arranged, with contacting of reduction valve valve pocket seal ring is housed also on the end face at cylinder body.The pre-compression force of pressure-relief valve spring is less than the pre-compression force of Regulation spring.The control cylinder body device is at the valve body end face, and it can be made up of seal ring, Regulation spring, screw, end cap, cylinder body and control piston.Rotate adjusting handle, can promote adjustable lever, the throttling valve core is moved axially, change the throttle valve valve port opening, regulate required flow.The reduction valve spool can move axially under pressure-relief valve spring, control piston and oil liquid pressure effect, changes the aperture of reduction valve valve port.Control piston can move axially under spring and oil pressure effect, and promotion or disengagement are to the effect of reduction valve spool.
Advantage of the present utility model is:
1. add the structural principle design of throttle valve because of the utility model adopts the Normally closed type Fixed differential reducing valve, so the reduction valve spool is under the effect of control piston, the reduction valve valve port is in closed condition at ordinary times.When starting work, the reduction valve valve port is opened stably, there is not the effect of transient state overshoot pressure before the throttle valve, therefore eliminated instantaneous flow overshoot, thereby guarantee that oil cylinder starts and reach the speed of its working feed stably, eliminate oil cylinder kick phenomenon, guaranteed quality of processing and equipment precision, the life-span.Can be used in the hydraulic control system, the speed of oil cylinder and oil motor has been carried out stable control.
2. the utility model can be transformed on the basis of existing series flow control valve, thereby the low face width of using of cost can be transformed the mesolow of present domestic employing, the whole series of mesohigh series flow control valve.
Description of drawings and enforcement:
Accompanying drawing 1 is the structural representation of series flow control valve.
Accompanying drawing 2 is the sectional view of series flow control valve.
Rotate adjusting handle (1) and can pass adjustable lever (2), overcome the pre-compression force of throttle valve spring (5), throttling valve core (4) is axially moved in valve body (7) endoporus, change the restriction aperture, owing to adjust the position-limiting action of cover (3) to adjustable lever (2), can control the throttle valve spool stroke, restriction can be opened and closed.Positioning rod (8) is used to improve the stability of pressure-relief valve spring (9) work.The reduction valve spool (10) that assembles in reduction valve valve pocket (12) hole is under the effect of pressure-relief valve spring (9) and control piston (23) and Regulation spring (18), and the reduction valve valve port is in normally off at ordinary times.When starting work, pressure oil enters the inlet (11) of reduction valve from oilhole (24), because of the reduction valve valve port is closed, pressure oil can not enter, have to be earlier entering cylinder body (22) through small holes (13) contacts with reduction valve valve pocket (12) in the annular space between the end face, because seal ring (14), (15) seal action, pressure oil has only inflow damping hole (16) to enter cylinder body (22) inner chamber, because the seal action of seal ring (17), so oil pressure overcomes the pre-compression force of Regulation spring (18), promoting control piston (23) moves to right, disengagement is to the effect of reduction valve spool (10), reduction valve spool this moment (10) moves to right under the effect of pressure-relief valve spring (9) thereupon, opens the reduction valve valve port.Under the decompression oil pressure and the acting in conjunction of outlet oil pressure in the oilhole (26) and pressure-relief valve spring (9) of reduction valve spool (10) in oilhole (25), be in certain opening homeostasis state.Seal ring (20) guarantees not external leakage of oil, and end cap (21) is fastened on the cylinder body (22) by screw (19).
Claims (1)
1, a kind of flow control element series flow control valve, it includes throttling arrangement, decompressor and valve body (7), throttling arrangement is by adjusting handle (1), adjustable lever (2), adjust cover (3), throttle valve spool (4) and throttle valve spring (5) are formed, decompressor is by positioning rod (8), pressure-relief valve spring (9), reduction valve spool (10) and reduction valve valve pocket (12) are formed, it is characterized in that said reduction valve valve pocket (12) has the annular space with contacting of cylinder body (22) between the end face, the oil duct (13) of in-line pressure oil by reduction valve valve pocket (12) flows into and enters cylinder body (22) inner chamber in this annular space, damping hole (16) is arranged on the cylinder body (22), with contacting of reduction valve valve pocket (12) seal ring (14) is housed on the end face at cylinder body (22), end face at said valve body (7) is equipped with the control cylinder body device, and this installs by seal ring (17), Regulation spring (18), screw (19), end cap (21), cylinder body (22) and control piston (23) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88201233 CN2031045U (en) | 1988-02-01 | 1988-02-01 | Governing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88201233 CN2031045U (en) | 1988-02-01 | 1988-02-01 | Governing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2031045U true CN2031045U (en) | 1989-01-18 |
Family
ID=4836480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88201233 Withdrawn CN2031045U (en) | 1988-02-01 | 1988-02-01 | Governing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2031045U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629408A (en) * | 2013-12-16 | 2014-03-12 | 西南铝业（集团）有限责任公司 | Speed regulation valve |
| CN105626613A (en) * | 2014-10-29 | 2016-06-01 | 北京精密机电控制设备研究所 | Single-stage constant-speed valve used for high-pressure kerosene constant-speed hydraulic motor |
-
1988
- 1988-02-01 CN CN 88201233 patent/CN2031045U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629408A (en) * | 2013-12-16 | 2014-03-12 | 西南铝业（集团）有限责任公司 | Speed regulation valve |
| CN103629408B (en) * | 2013-12-16 | 2015-12-02 | 西南铝业（集团）有限责任公司 | Series flow control valve |
| CN105626613A (en) * | 2014-10-29 | 2016-06-01 | 北京精密机电控制设备研究所 | Single-stage constant-speed valve used for high-pressure kerosene constant-speed hydraulic motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |