CN204004638U - A kind of pressure adjustable pilot-operated type reduction valve - Google Patents
A kind of pressure adjustable pilot-operated type reduction valve Download PDFInfo
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- CN204004638U CN204004638U CN201420313110.9U CN201420313110U CN204004638U CN 204004638 U CN204004638 U CN 204004638U CN 201420313110 U CN201420313110 U CN 201420313110U CN 204004638 U CN204004638 U CN 204004638U
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Abstract
The utility model discloses a kind of pressure adjustable pilot-operated type reduction valve, comprise valve body, it is characterized in that: also comprise main valve plug, cone valve, main spool spring, pressure adjusting spring and adjusting nut, at valve body top, be provided with cone valve, in cone valve left side, be provided with the pressure adjusting spring being connected with side adjusting nut, in the valve body on cone valve right side, be provided with right-hand member oil pocket, in cone valve lower end, be provided with main valve plug, in main valve plug upper end, be provided with main spool spring, in main valve plug bottom, be provided with lower end oil pocket, in main valve plug upper end, be provided with upper end oil pocket, described influent stream mouth is connected with high-pressure oil passage, described high-pressure oil passage is connected with low pressure oil way by throttle chink.It is a kind of simple in structure, easy to use that the utility model provides, and can realize backflow, and precompression that can quick adjustment spring, is applicable to the pressure adjustable pilot-operated type reduction valve that different situations are used.
Description
Technical field
The utility model relates to a kind of reduction valve, particularly relates to a kind of pressure adjustable pilot-operated type 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.And current structure of relief pressure valve is complicated, cannot realize preferably decompression, and be not provided with return opening, cannot receive oil sump tank, can only carry out the conveying of fluid, very easily damage, working life is shorter, pressure-relief valve spring prestressing force cannot regulate preferably simultaneously, causes like this reduction valve to use very inconvenient.
Model utility content
In order to solve structure of relief pressure valve complexity in prior art, cannot realize preferably decompression, and be not provided with return opening, cannot receive oil sump tank, can only carry out the conveying of fluid, very easily damage, working life is shorter, pressure-relief valve spring prestressing force cannot regulate preferably simultaneously, causes like this reduction valve to use very inconvenient problem, and it is a kind of simple in structure that the utility model provides, easy to use, can realize backflow, and precompression that can quick adjustment spring, be applicable to the pressure adjustable pilot-operated type reduction valve that different situations are used.
In order to address the above problem, technical solution adopted in the utility model is:
A kind of pressure adjustable pilot-operated type reduction valve, comprise valve body, it is characterized in that: also comprise main valve plug, cone valve, main spool spring, pressure adjusting spring and adjusting nut, at valve body top, be provided with cone valve, in cone valve left side, be provided with the pressure adjusting spring being connected with side adjusting nut, in the valve body on cone valve right side, be provided with right-hand member oil pocket, in cone valve lower end, be provided with main valve plug, in main valve plug upper end, be provided with main spool spring, in main valve plug bottom, be provided with lower end oil pocket, in main valve plug upper end, be provided with upper end oil pocket, described influent stream mouth is connected with high-pressure oil passage, described high-pressure oil passage is connected with low pressure oil way by throttle chink.
Aforesaid a kind of pressure adjustable pilot-operated type reduction valve, is characterized in that: described low pressure oil way is connected with main valve plug upper end oil pocket with the throttling pore on main valve plug by arranging.
Aforesaid a kind of pressure adjustable pilot-operated type reduction valve, is characterized in that: described low pressure oil way is connected with main valve plug lower end oil pocket with the bottom passageway on main valve plug by arranging.
Aforesaid a kind of pressure adjustable pilot-operated type reduction valve, is characterized in that: in main valve plug upper end, be provided with upper end stream, described upper end oil pocket is connected and is connected with right-hand member oil pocket by upper end stream.
Aforesaid a kind of pressure adjustable pilot-operated type reduction valve, is characterized in that: on valve body, be provided with drain tap, described cone valve valve port is connected with drain tap by draining stream.
Aforesaid a kind of pressure adjustable pilot-operated type reduction valve, is characterized in that: described valve body adopts hard material to make.
The beneficial effects of the utility model are: the utility model pressure adjustable pilot-operated type reduction valve, and influent stream mouth is connected with high-pressure oil passage, and described high-pressure oil passage is connected with low pressure oil way by throttle chink.In main valve plug upper end, be provided with upper end stream, described upper end oil pocket is connected and is connected with right-hand member oil pocket by upper end stream, is provided with drain tap on valve body, and described cone valve valve port is connected with drain tap by draining stream.By drain tap, can realize fluid and be back to fuel tank, use convenient.The utility model is provided with in cone valve left side the pressure adjusting spring being connected with side adjusting nut simultaneously, changes the precompression of pressure adjusting spring by adjusting nut, meets different use needs.
Accompanying drawing explanation
Fig. 1 is the utility model pressure adjustable pilot-operated type structure of relief pressure valve schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of pressure adjustable pilot-operated type reduction valve, comprise valve body 1, main valve plug 2, cone valve 3, main spool spring 4, pressure adjusting spring 5 and adjusting nut 6, described valve body 1 adopts hard material to make, at valve body 1 top, be provided with cone valve 3, in cone valve 3 left sides, be provided with the pressure adjusting spring 5 being connected with side adjusting nut 6, in the valve body 1 on cone valve 3 right sides, be provided with right-hand member oil pocket 7, in cone valve 3 lower ends, be provided with main valve plug 2, in main valve plug 2 upper ends, be provided with main spool spring 4, in main valve plug 2 bottoms, be provided with lower end oil pocket 8, in main valve plug 2 upper ends, be provided with upper end oil pocket 9, described influent stream mouth is connected with high-pressure oil passage 10, described high-pressure oil passage 10 is connected with low pressure oil way 12 by throttle chink 11.
Described low pressure oil way 12 is connected with main valve plug 2 upper end oil pockets 9 with the throttling pore 13 on main valve plug 2 by arranging.Low pressure oil way 12 is connected with main valve plug 2 lower end oil pockets 8 with the bottom passageway 14 on main valve plug 2 by arranging.In main valve plug 2 upper ends, be provided with upper end stream 15, described upper end oil pocket 9 is connected and is connected with right-hand member oil pocket 7 by upper end stream 15.On valve body 1, be provided with drain tap 16, described cone valve 3 valve ports are connected with drain tap 16 by draining stream 17.
The utility model pressure adjustable pilot-operated type reduction valve, liquid resistance step-down when it mainly utilizes fluid through gap, hydraulic system enters low pressure oil way formation low pressure fluid B through the high-voltage oil liquid A of high-pressure oil passage 10 through throttle chink 11 and flows out from oil outlet, and through branch, oil circuit is sent to actuator.Low pressure fluid B enters main valve plug 2 lower end oil pockets 8 through bottom passageway 14 simultaneously, through throttling pore 13, enter again the upper end oil pocket 9 of main valve plug 2 upper ends, and through upper end stream 15, enter the right-hand member oil pocket 7 of cone valve 3, give 3 one of cone valves hydraulic coupling left, the spring force of this hydraulic coupling and Regulation spring 5 balances each other, thereby control low pressure fluid, substantially keeps set pressure.
When the low pressure fluid B of oil outlet is during lower than set pressure, cone valve 3 cuts out, and main valve plug 2 upper end oil pocket 9 oil liquid pressures are stable, the spring force of main spool spring 4 overcomes surface friction drag and pushes main valve plug 2 to lower end, throttle chink 11 increases to maximum, and reduction valve is in off position, i.e. normally open.
When branch's oil circuit load increases, low pressure fluid B raises, and while surpassing set pressure, cone valve 3 is opened, and a small amount of fluid, through cone valve mouth, draining stream 17, flows back to fuel tank by drain tap 16.Owing at this moment there being fluid to flow through throttling pore 13, produce pressure difference.When the active force making progress producing when pressure difference is greater than the spring force sum of main valve plug 2 gravity, frictional force, main spool spring 3, main valve plug 2 moves up, throttle chink 11 is reduced, throttling aggravation, low pressure fluid B pressure declines thereupon, until each active force acting on main valve plug 2 balances each other, main valve plug 2 is just in new equilibrium position, adjust the pre compressed magnitude that adjusting nut 6 changes pressure adjusting spring 5, can change cracking pressure.
In sum, the utility model pressure adjustable pilot-operated type reduction valve, influent stream mouth is connected with high-pressure oil passage 10, and described high-pressure oil passage 10 is connected with low pressure oil way 12 by throttle chink 11.In main valve plug 2 upper ends, be provided with upper end stream 15, described upper end oil pocket 9 is connected and is connected with right-hand member oil pocket 7 by upper end stream 15, is provided with drain tap 16 on valve body 1, and described cone valve valve port is connected with drain tap 16 by draining stream 17.By drain tap 16, can realize fluid and be back to fuel tank, use convenient.The utility model is provided with the pressure adjusting spring 5 being connected with side adjusting nut 6 in cone valve 3 left sides simultaneously, changes the precompression of pressure adjusting spring by adjusting nut 6, meets different use needs.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. a pressure adjustable pilot-operated type reduction valve, comprise valve body, it is characterized in that: also comprise main valve plug, cone valve, main spool spring, pressure adjusting spring and adjusting nut, at valve body top, be provided with cone valve, in cone valve left side, be provided with the pressure adjusting spring being connected with side adjusting nut, in the valve body on cone valve right side, be provided with right-hand member oil pocket, in cone valve lower end, be provided with main valve plug, in main valve plug upper end, be provided with main spool spring, in main valve plug bottom, be provided with lower end oil pocket, in main valve plug upper end, be provided with upper end oil pocket, described influent stream mouth is connected with high-pressure oil passage, described high-pressure oil passage is connected with low pressure oil way by throttle chink.
2. a kind of pressure adjustable pilot-operated type reduction valve according to claim 1, is characterized in that: described low pressure oil way is connected with main valve plug upper end oil pocket with the throttling pore on main valve plug by arranging.
3. a kind of pressure adjustable pilot-operated type reduction valve according to claim 2, is characterized in that: described low pressure oil way is connected with main valve plug lower end oil pocket with the bottom passageway on main valve plug by arranging.
4. a kind of pressure adjustable pilot-operated type reduction valve according to claim 3, is characterized in that: in main valve plug upper end, be provided with upper end stream, described upper end oil pocket is connected and is connected with right-hand member oil pocket by upper end stream.
5. a kind of pressure adjustable pilot-operated type reduction valve according to claim 4, is characterized in that: on valve body, be provided with drain tap, described cone valve valve port is connected with drain tap by draining stream.
6. a kind of pressure adjustable pilot-operated type reduction valve according to claim 5, is characterized in that: described valve body adopts hard material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313110.9U CN204004638U (en) | 2014-06-13 | 2014-06-13 | A kind of pressure adjustable pilot-operated type reduction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313110.9U CN204004638U (en) | 2014-06-13 | 2014-06-13 | A kind of pressure adjustable pilot-operated type reduction valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204004638U true CN204004638U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420313110.9U Expired - Fee Related CN204004638U (en) | 2014-06-13 | 2014-06-13 | A kind of pressure adjustable pilot-operated type reduction valve |
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| Country | Link |
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| CN (1) | CN204004638U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061351A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Adjustable-pressure pilot-operated type pressure reducing valve |
-
2014
- 2014-06-13 CN CN201420313110.9U patent/CN204004638U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061351A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Adjustable-pressure pilot-operated type pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160613 |