CN205118400U - Pilot valve of controllable aperture - Google Patents
Pilot valve of controllable aperture Download PDFInfo
- Publication number
- CN205118400U CN205118400U CN201520875273.0U CN201520875273U CN205118400U CN 205118400 U CN205118400 U CN 205118400U CN 201520875273 U CN201520875273 U CN 201520875273U CN 205118400 U CN205118400 U CN 205118400U
- Authority
- CN
- China
- Prior art keywords
- spool
- water
- valve
- control spool
- main valve
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model provides a pilot valve of controllable aperture includes mainly that valve body, preceding accuse case, case guide arm, leather cup, case back of the body chamber, control lever control case, disk seat, main valve core after, the utility model discloses a control the follow up mechanism of case before utilizing pipeline pressure driven main valve core to follow, through the aperture of accuse case before controlling, utilize the main valve core and the follow -up of preceding accuse case to reach the purpose of controlling pilot valve valve opening. The utility model discloses compare in traditional pilot valve and not only have the characteristics that the control moment is little, have still that valve opening is automatic adjustable, simple structure is reliable, the designing requirement is low, production low in manufacturing cost is honest and clean, the characteristics of operating range guangZhou.
Description
Technical field
The present invention relates to the design ap-plication neighborhood of pilot valve in pipeline valve, be a kind of can the pilot valve of control valve aperture.
Background technique
Pilot valve is little as a kind of control moment, control is reliable, the conventional valve of long service life, is particularly suitable for automation control area.Application is had at the neighborhood such as agricultural automation, industrial automation.
Conventional pilot valves controls the break-make of spool back of the body chamber and pipeline pressure end by secondary channels, reaches the object of switch valve.Conventional pilot valves cannot use and control the aperture that runner carrys out control valve, and namely valve only has standard-sized sheet and full cut-off two states, and cannot realize controlled intermediateness.Conventional pilot valves is in order to improve this problem, have employed the manually spacing mode of increase to carry out maximum opening restriction, but its spacing control cannot utilize it to control runner and complete, therefore control operation moment is very big, lose the advantage that pilot valve control moment is little, significantly limit utilization field and the application area of pilot valve.
Summary of the invention
The present invention, in order to address this problem, innovate a kind of can utilization and controls the pilot valve that runner carrys out control valve aperture.
A kind of pilot valve of controlled aperture, first being all arranged in tubular valve body by all for valve controlling componenies of the invention, and the mode adopting main valve plug preposition, use the pressure of water-inlet cavity to make main valve plug close valve port, reach the object of throttle down, make valve closing more reliable like this.Main valve plug, leather cup, valve base sealing are connected to form spool back of the body chamber, adopt same pressure lower valve core back of the body cavity pressure to be greater than the design of main valve plug positive pressure simultaneously, the pressure that spool back of the body chamber puts on main valve plug is contrary with the pressure direction that water-inlet cavity puts on main valve plug, and there is a pressure difference, control spool before controlling is adopted to do axial linear movement forward, the pressure difference that the spool back of the body chamber and water-inlet cavity put on main valve plug drives main valve plug to follow front spool of controlling and does axial linear movement (referred to herein as servo-actuated) in the same way, thus reaches the object of control valve aperture.
On this basis, the front control spool that have employed of innovation connects to form control unit by spool guide rod, controlling rod and rear control spool, control unit entirety adopts ralocatable mode (can do straight line motion freely vertically) in the axial direction, thus impact when solving main valve plug motion, control unit produced.By regulating the distance (being called command range) to axial of front control spool and rear control spool, before making, control spool does axial linear movement, under hydraulic pressure effect, main valve plug is controlled spool and is done axial linear movement in the same way before following, the relative distance (being called valve opening) of main valve plug and valve port changes, thus controls the variable quantity of valve opening.
When increase command range, front control spool does straight line motion forward, front control spool opens the water inlet on main valve plug, water-inlet cavity liquid enters spool back of the body chamber by water inlet, rear control spool closes the weep hole of valve seat, the blocking spool back of the body chamber and water chamber make spool carry on the back cavity pressure to increase, and spool is carried on the back cavity pressure and overcome water-inlet cavity pressure promotion main valve plug and travel forward, valve open.The while that main valve plug being proal, the water inlet distance on front control spool and main valve plug reduces, until front control spool closes water inlet, block water-inlet cavity and carry on the back being communicated with of chamber with spool, reach pressure balance, valve keeps the open mode of corresponding aperture.
Otherwise when reducing command range, front control spool closes water inlet, has blocked water-inlet cavity and has carried on the back being communicated with of chamber with spool.Simultaneously, control spool travels forward, and opens the weep hole on valve seat.Spool back of the body intracavity liquid is discharged to water chamber by weep hole, and spool back of the body cavity pressure reduces, and water-inlet cavity pressure is greater than spool back of the body cavity pressure, and main valve plug moves to valve port direction, until throttle down.
The present invention simultaneously all adopts coaxial tubular layout, and all Impact direction are all coaxial direction, and main structure can be sealed in valve inner completely, and therefore Structural strength calls is low, volume size is little.Simultaneously due to main structure for coaxial tubular design, answer this to be installed on completely within pipeline or with pipeline and be coaxial docking.
Pilot valve based on a kind of controlled aperture of above feature has that valve opening is adjustable, compact structure, simple and reliable and runner design is compact, not susceptible to plugging feature, expanded application and the market of pilot valve greatly.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of schematic diagram of pilot valve of controlled aperture.
Mark in accompanying drawing: 1 valve body, 2 water-inlet cavitys, control spool before 3,4 water inlets, 5 spool guide rods, 6 leather cups, 7 spool back of the body chambeies, 8 controlling rods, control spool after 9,10 weep holes, 11 valve seats, 12 water chambers, 13 valve ports, 14 main valve plugs.
Embodiment
A kind of pilot valve of controlled aperture as shown in Figure 1, comprise: affixed all-in-one-piece valve body (1), front control spool (3), spool guide rod (5), leather cup (6), controlling rod (8), rear control spool (9), valve seat (11), main valve plug (14), valve body (1) front end is provided with water-inlet cavity (2) (water-inlet cavity (2) extreme direction of valve body (1) is front), rear end is provided with water chamber (12) (water chamber (12) extreme direction of valve body (1) is rear), centre is provided with valve port (13), water-inlet cavity (2) is communicated with water chamber (12) by valve port (13), main valve plug (14) is provided with water inlet (4), valve seat (11) is provided with weep hole (10).
As shown in Figure 1, main valve plug (14) is arranged on water-inlet cavity (2), and main valve plug (14) front end can close valve port (13), and main valve plug (14) rear end, is tightly connected with leather cup (6) in water chamber (12) from water-inlet cavity (2) end through valve port (13).Leather cup (6) the other end and valve seat (11) are tightly connected, and valve seat (11) is fixedly installed in the water chamber (12) of valve body (1), and main valve plug (14), leather cup (6), valve seat (11) are tightly connected and form spool back of the body chamber (7).Main valve plug (14) can open and close valve port (13) when axially moving.With upper-part be all coaxial line install.
As shown in Figure 1, front control spool (3) is arranged in main valve plug (14), front control spool (3) can close water inlet (4), front control spool (3) rear end is provided with spool guide rod (5), spool guide rod (5) is socketed with controlling rod (8) screw thread in spool back of the body chamber (7) through water inlet (4), rotated relative to spool guide rod (5) by controlling rod (8), the axial distance of front control spool (3) and rear control spool (9) can be regulated.Rear control spool (9) is positioned at spool back of the body chamber (7), and controlling rod (8) is connected with rear control spool (9) is coaxial, and rear control spool (9) can close weep hole (10).Front control spool (3), spool guide rod (5), controlling rod (8) and rear control spool (9) form control unit.Control unit entirety is quick condition (can do straight line motion freely vertically) in the axial direction.With upper-part be all coaxial line install.
As shown in Figure 1, when water-inlet cavity (2) has pressure, regulate the distance (being called command range) to axial of front control spool (3) and rear control spool (9), front control spool (3) can do axial linear movement, main valve plug (14) follow under stress before control spool (3) do axial linear movement in the same way, main valve plug (14) changes with the relative distance (being called valve opening) of valve port (13), and command range variable quantity can be proportional to valve opening variable quantity.Now valve has and opens aperture accordingly.
As shown in Figure 1, when water-inlet cavity (2) has pressure, increase the distance (being called command range) to axial of front control spool (3) and rear control spool (9), front control spool (3) can do straight line motion forward, and the water inlet (4) of opening on main valve plug (14), rear control spool (9) can close the weep hole (10) of valve seat (11) simultaneously, spool back of the body chamber (7) pressure overcomes water-inlet cavity (2) pressure-driven main valve plug (14) to be done forward straight line motion and opens valve port (13), valve open.Main valve plug (14) does forward straight line motion can make front control spool (3) reduce with water inlet (4) distance on main valve plug (14), until front control spool (3) closes water inlet (4), block water-inlet cavity (2) and carry on the back being communicated with of chamber (7) with spool, make valve be in controlled aperture hold mode.
The distance (being called command range) to axial of corresponding reduction front control spool (3) and rear control spool (9), front control spool (3) can close the water inlet (4) on main valve plug (14), rear control spool (9) can open the weep hole (10) of valve seat (11) simultaneously, spool back of the body chamber (7) earth pressure release is to water chamber (12), main valve plug (14) moves to valve port direction, and close valve port (13), valve closing.
The present invention follows by utilizing pipeline pressure to realize the auto state of main valve plug (14) to front control spool (3), is reached through the object that minimum moment carrys out control valve aperture.
Claims (8)
1. the pilot valve of a controlled aperture, comprise: affixed all-in-one-piece valve body (1), front control spool (3), spool guide rod (5), leather cup (6), controlling rod (8), rear control spool (9), valve seat (11), main valve plug (14), valve body (1) front end is provided with water-inlet cavity (2) (water-inlet cavity (2) extreme direction of valve body (1) is front), rear end is provided with water chamber (12) (water chamber (12) extreme direction of valve body (1) is rear), centre is provided with valve port (13), water-inlet cavity (2) is communicated with water chamber (12) by valve port (13), main valve plug (14) is provided with water inlet (4), valve seat (11) is fixedly installed in valve body (1), valve seat (11) is provided with weep hole (10), main valve plug (14), leather cup (6), valve seat (11) is tightly connected and forms spool back of the body chamber (7), front control spool (3) one end is provided with spool guide rod (5), it is characterized in that: main valve plug (14) is positioned at water-inlet cavity (2), main valve plug (14) can close valve port (13), spool guide rod (5) is tightly connected with leather cup (6) from water-inlet cavity (2) end through valve port (13) in water chamber (12), valve seat (11) is arranged in water chamber (12), leather cup (6) and valve seat (11) are tightly connected, front control spool (3) is positioned at main valve plug (14) front end (relative to water-inlet cavity (2)), front control spool (3) can close water inlet (4), spool guide rod (5) is connected with rear control spool (9) by controlling rod (8) in spool back of the body chamber (7) through water inlet (4), rear control spool (9) can close weep hole (10).
2. the pilot valve of a kind of controlled aperture according to claim 1, it is characterized in that: the pressure that spool back of the body chamber (7) puts on main valve plug (14) is contrary with the pressure direction that water-inlet cavity (2) puts on main valve plug (14), and there is a pressure difference, control spool (3) before controlling is adopted to do axial linear movement, the pressure difference that spool back of the body chamber (7) and water-inlet cavity (2) put on main valve plug (14) drives main valve plug (14) to follow and frontly controls the mode that spool (3) does axial linear movement (referred to herein as servo-actuated) in the same way, reach the object of controlled aperture switch valve.
3. the pilot valve of a kind of controlled aperture according to claim 2, it is characterized in that: front control spool (3) is by spool guide rod (5) and controlling rod (8), rear control spool (9) connects to form control unit, control unit entirety is quick condition (can do straight line motion freely vertically) in the axial direction, front control spool (3) and rear control spool (9) to axial apart from adjustable, by regulating the distance (being called command range) to axial of front control spool (3) and rear control spool (9), before making, axial linear movement is done in control spool (3), main valve plug (14) follow before control spool (3) do axial linear movement in the same way, main valve plug (14) is caused to change with the relative distance (being called valve opening) of valve port (13), command range variable quantity is proportional to valve opening variable quantity.
4. the pilot valve of a kind of controlled aperture according to claim 3, it is characterized in that: when front control spool (3) does forward straight line motion, front control spool (3) opens the water inlet (4) on main valve plug (14), make water-inlet cavity (2) carry on the back chamber (7) by water inlet (4) and spool to be communicated with, rear control spool (9) closes the weep hole (10) of valve seat (11), blocking spool back of the body chamber (7) is communicated with water chamber (12), spool back of the body chamber (7) pressure overcomes water-inlet cavity (2) pressure-driven main valve plug (14) and does straight line motion forward, main valve plug (14) does forward straight line motion can make front control spool (3) reduce with water inlet (4) distance on main valve plug (14), until front control spool (3) closes water inlet (4), block water-inlet cavity (2) and carry on the back being communicated with of chamber (7) with spool.
5. the pilot valve of a kind of controlled aperture according to claim 4, it is characterized in that: when before main valve plug (14) promotes, straight line motion is done forward in control spool (3), front control spool (3) controls spool (9) after driving does straight line motion forward, front control spool (3) can close water inlet (4), block water-inlet cavity (2) and carry on the back being communicated with of chamber (7) with spool, rear control spool (9) opens the weep hole (10) of valve seat (11), and spool back of the body chamber (7) is communicated with by weep hole (10) and water chamber (12).
6. the pilot valve of a kind of controlled aperture according to claim 5, it is characterized in that: when water-inlet cavity (2) and spool carry on the back chamber (7) pressure identical time, spool back of the body chamber (7) pressure put on main valve plug (14) is greater than water-inlet cavity (2) and puts on pressure on main valve plug (14).
7. the pilot valve of a kind of controlled aperture according to claim 5, it is characterized in that: front control spool (3) with spool guide rod (5) for axial restraint is connected, spool guide rod (5) is threadedly connected with controlling rod (8), controlling rod (8) with rear control spool (9) for axial restraint is connected, rotated relative to spool guide rod (5) by controlling rod (8), the axial distance of front control spool (3) and rear control spool (9) can be regulated.
8. the pilot valve of a kind of controlled aperture according to claim 1, it is characterized in that: valve body (1) is tubular structure, front control spool (3), spool guide rod (5), leather cup (6), controlling rod (8), rear control spool (9), valve seat (11), main valve plug (14) are all installed on valve body (1) inside, and are all coaxial construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875273.0U CN205118400U (en) | 2015-11-05 | 2015-11-05 | Pilot valve of controllable aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875273.0U CN205118400U (en) | 2015-11-05 | 2015-11-05 | Pilot valve of controllable aperture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205118400U true CN205118400U (en) | 2016-03-30 |
Family
ID=55574015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520875273.0U Withdrawn - After Issue CN205118400U (en) | 2015-11-05 | 2015-11-05 | Pilot valve of controllable aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205118400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485412A (en) * | 2015-11-05 | 2016-04-13 | 王大海 | Openness-controllable pilot valve |
-
2015
- 2015-11-05 CN CN201520875273.0U patent/CN205118400U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485412A (en) * | 2015-11-05 | 2016-04-13 | 王大海 | Openness-controllable pilot valve |
| CN105485412B (en) * | 2015-11-05 | 2018-03-09 | 王大海 | A kind of pilot valve of controllable aperture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204061372U (en) | A kind of oil hydraulic cylinder quick-expansion control loop | |
| CN101954968B (en) | Valve block special for hydraulic steering engine | |
| WO2011101832A8 (en) | An electric valve device | |
| CN104653806A (en) | Electric linear ball valve with opening degree and flow rate linear relationship | |
| CN202251173U (en) | Non-differential floating double-cylinder assembly | |
| JP2010530500A5 (en) | ||
| CN107504005B (en) | Forced oil supplementing multi-way valve driven to judge | |
| CN102900731B (en) | Hydraulic control system for emergency withdraw of arm support | |
| CN102374325A (en) | Intelligent pressure-stabilizing stop-check valve | |
| CN205118400U (en) | Pilot valve of controllable aperture | |
| CN103899596A (en) | Hydraulic lock with pilot one-way valve | |
| CN101576105B (en) | Flushing valve | |
| CN209414295U (en) | A kind of logical valve | |
| CN211449776U (en) | High-pressure-difference water-control piston type pressure reducing valve | |
| CN202833378U (en) | Electro-hydraulic directional control valve | |
| CN104179734A (en) | Constant-pressure control device and method for hydraulic pump | |
| CN103470552A (en) | Hydraulic system with buffer function | |
| CN204533020U (en) | A kind of integrated multifunction hydraulic element | |
| CN104963905A (en) | Two-stage overflow unloading valve | |
| CN202228770U (en) | Fast-discharging slow-feeding air valve with large draft diameter | |
| CN105485412A (en) | Openness-controllable pilot valve | |
| CN202945636U (en) | Hydraulic system of loading machine with floating function | |
| CN203161701U (en) | Damped speed controllable hydraulic valve bank | |
| CN103939649B (en) | Self-operated type stop valve | |
| CN204704186U (en) | Twin-stage overflow unloading valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160330 Effective date of abandoning: 20180309 |