CN108506267B - A kind of loop choice valve with decompression function - Google Patents
A kind of loop choice valve with decompression function Download PDFInfo
- Publication number
- CN108506267B CN108506267B CN201810409835.0A CN201810409835A CN108506267B CN 108506267 B CN108506267 B CN 108506267B CN 201810409835 A CN201810409835 A CN 201810409835A CN 108506267 B CN108506267 B CN 108506267B
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- Prior art keywords
- hydraulic fluid
- fluid port
- valve
- spool
- relief hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
Abstract
The present invention proposes a kind of loop choice valve with decompression function, it include: that there is valve opening on valve body, valve opening is configured with left pressure-releasing chamber and right pressure-releasing chamber, there is the first hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port, the 4th hydraulic fluid port, the 5th hydraulic fluid port and the 6th hydraulic fluid port on valve body, left pressure-releasing chamber is connected by the first check valve with the second hydraulic fluid port, and right pressure-releasing chamber is connected by second one-way valve with the 5th hydraulic fluid port；Spool can be movably located in valve opening, have through flow hole and the first relief hole, the second relief hole, third relief hole and the 4th relief hole on spool；Left end cap is detachably arranged in the left end that valve opening is closed on valve body；The left end of elastic component is against the right end of left end cap and the right end of elastic component is against the left end of spool；Electromagnet is detachably arranged in the right end that valve opening is closed on valve body, and face states the right end of spool to the push rod of electromagnet to the left.Loop choice valve according to an embodiment of the present invention with decompression function, structure are simple, at low cost, easy for installation.
Description
Technical field
The present invention relates to a kind of valve, a kind of especially loop choice valve with decompression function.
Background technique
In modern industrial hydraulic and walking machine hydraulic circuit, multiple identical executive component (liquid have largely been used
Cylinder pressure or hydraulic motor) in parallel and sequentially-operating oil circuit.As shown in figure 5, being usually according to executing member in existing hydraulic system
The electro-hydraulic proportional multi-way valve of the selected corresponding connection number of the number of part removes control executive component.Present in existing oil circuit the disadvantage is that: (1)
Every expensive of electro-hydraulic proportional multi-way valve, market price has into the not high mechanical equipment of price at 3000 yuan -4000 yuan
This pressure；(2) amplifier or controller will be configured to every electro-hydraulic proportional valve, multi-joint electro-hydraulic proportional valve is selected also to increase
The complexity of automatically controlled cost and system is added.
To solve the above-mentioned problems, occurs loop choice valve on existing market, as shown in figure 4, can be in hydraulic circuit
In only with a piece of electro-hydraulic proportional valve, select to control which cylinder action, existing circuit by the control of loop choice valve
Selector valve can be very good instead of expensive electro-hydraulic proportional valve and reduce the cost of electric-control system；But this loop choice valve
It cannot apply in the hydraulic circuit comprising hydraulic lock or balanced valve, because four actuator ports of existing loop choice valve exist
It is off state when in off working state, does not have unloading function, will cause the late release of hydraulic lock and balanced valve, thus
Cause the exceeded downslide of executive component.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, that an object of the present invention is to provide a kind of structures is simple, manufacturing cost is low, easy for installation having is let out
Press the loop choice valve of function.
A kind of loop choice valve with decompression function according to an embodiment of the present invention, comprising:
Valve body has the valve opening for penetrating through the valve body in left-right direction on the valve body, and the left end of the valve opening is configured to
The right end of left pressure-releasing chamber and the valve opening is configured to right pressure-releasing chamber, have on the valve body arrangement from left to right and respectively with it is described
Valve opening connection and the first hydraulic fluid port between the left pressure-releasing chamber and the right pressure-releasing chamber, the second hydraulic fluid port, third hydraulic fluid port, the 4th
Hydraulic fluid port, the 5th hydraulic fluid port and the 6th hydraulic fluid port, the left pressure-releasing chamber are connected by the first check valve with second hydraulic fluid port, and the right side is let out
Pressure chamber is connected by second one-way valve with the 5th hydraulic fluid port；
Spool, the spool can be movably located in the valve opening, had on the spool and penetrated through in left-right direction
The through flow hole of the spool, also have on the spool apart from one another by and respectively be connected to the through flow hole the first relief hole,
Second relief hole, third relief hole and the 4th relief hole；
Left end cap, the left end cap are detachably arranged in the left end that the valve opening is closed on the valve body；
Elastic component, the left end of the elastic component is against the right end of the left end cap and the right end of the elastic component is against described
The left end of spool；
Electromagnet, the electromagnet are detachably arranged in the right end that the valve opening is closed on the valve body, the electromagnetism
The right end of the push rod of iron spool described in face to the left；
When the electromagnet power loss, the push rod is retracted to the right in the electromagnet and the elastic component pushes to the right institute
Spool is stated, is let out at this point, the spool closes first hydraulic fluid port, second relief hole, the 4th hydraulic fluid port and the described 4th
Hole is pressed, first relief hole is connected to first hydraulic fluid port and the through flow hole, third relief hole connection the 4th oil
Mouth and the through flow hole, the spool are connected to second hydraulic fluid port and the third hydraulic fluid port, spool connection the 5th oil
Mouth and the 6th hydraulic fluid port；
When the electromagnet is powered, the push rod stretches out the electromagnet to the left to push the spool to overcome the bullet
Property part elastic force be moved to the left, at this point, the spool closes first relief hole, the third relief hole, third oil
Mouth and the 6th hydraulic fluid port, second relief hole are connected to the third hydraulic fluid port and the through flow hole, and the 4th relief hole connects
Lead to the 6th hydraulic fluid port and the through flow hole, the spool is connected to first hydraulic fluid port and second hydraulic fluid port, and the spool connects
Lead to the 4th hydraulic fluid port and the 5th hydraulic fluid port；
If the second hydraulic fluid port be in oil return opening communicating state, the oil liquid of left pressure-releasing chamber and right pressure-releasing chamber is unidirectional by first
Valve flows into the second hydraulic fluid port and completes pressure release；If the 5th hydraulic fluid port be in oil return opening communicating state, left pressure-releasing chamber and right pressure-releasing chamber
Oil liquid flows into the 5th hydraulic fluid port by second one-way valve and completes pressure release.
Advantageously, the elastic component is spring.
Advantageously, the left end cap is connect with the valve body screw thread.
Advantageously, the electromagnet is connect with the valve body screw thread.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the structure chart of the loop choice valve according to an embodiment of the invention with decompression function；
Fig. 2 is the schematic diagram of the loop choice valve according to an embodiment of the invention with decompression function；
Fig. 3 is a kind of liquid of application scenarios of the loop choice valve according to an embodiment of the invention with decompression function
Push back road schematic diagram；
Fig. 4 is the schematic diagram of existing loop choice valve；
Fig. 5 is prior art hydraulic circuit schematic diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail a kind of loop choice valve with decompression function according to an embodiment of the present invention.
A kind of loop choice valve with decompression function according to an embodiment of the present invention, comprising: valve body 3, spool 4, left end
Lid 1, elastic component 2, electromagnet 5.
Specifically, having the valve opening for penetrating through valve body 3 in left-right direction on valve body 3, the left end of the valve opening is configured to a left side
The right end of pressure-releasing chamber 32 and the valve opening is configured to right pressure-releasing chamber 31.
Have on valve body 3 and arranges and be connected to respectively with the valve opening from left to right and between left pressure-releasing chamber 32 and right pressure-releasing chamber
The first hydraulic fluid port B, the second hydraulic fluid port P2, third hydraulic fluid port D, the 4th hydraulic fluid port A, the 5th hydraulic fluid port P1 and the 6th hydraulic fluid port C between 31, left pressure release
Chamber 32 is connected by the first check valve 6 with the second hydraulic fluid port P2, and right pressure-releasing chamber 31 passes through second one-way valve 7 and the 5th hydraulic fluid port P1 phase
Even.
Spool 4 can be movably located in the valve opening, had on spool 4 and penetrated through the through-flow of spool 4 in left-right direction
Hole 41, also have on spool 4 apart from one another by and the first relief hole 4a, the second relief hole 4b, that are connected to through flow hole 41 respectively
Three relief hole 4c and the 4th relief hole 4d.
Left end cap 1 is detachably arranged in the left end that the valve opening is closed on valve body 3.Advantageously, left end cap 1 and valve body 3
It is threadedly coupled.
The left end of the elastic component 2 of such as spring is against the right end of left end cap 1 and the right end of elastic component 2 is against a left side for spool 4
End.
Electromagnet 5 is detachably arranged in the right end that the valve opening is closed on valve body 3, and the push rod 51 of electromagnet 5 is to the left just
To the right end of spool 4.Advantageously, electromagnet 5 is threadedly coupled with valve body 3.
As shown in Figure 1, push rod 51 retracts to the right in electromagnet 5 and elastic component 2 pushes to the right valve when 5 power loss of electromagnet
Core 4, at this point, spool 4 closes the first hydraulic fluid port B, the second relief hole 4b, the 4th hydraulic fluid port A and the 4th relief hole 4d, the first relief hole 4a
It is connected to the first hydraulic fluid port B and through flow hole 41, third relief hole 4c is connected to the 4th hydraulic fluid port A and through flow hole 41, and spool 4 is connected to the second hydraulic fluid port
P2 and third hydraulic fluid port D, spool 4 are connected to the 5th hydraulic fluid port P1 and the 6th hydraulic fluid port C；
When electromagnet 5 is powered, push rod 51 stretches out electromagnet 5 to the left to push spool 4 to overcome the elastic force of elastic component 2 to the left
It is mobile, at this point, spool 4 closes the first relief hole 4a, third relief hole 4c, third hydraulic fluid port D and the 6th hydraulic fluid port C, the second relief hole
4b is connected to third hydraulic fluid port D and through flow hole 41, and the 4th relief hole 4d is connected to the 6th hydraulic fluid port C and through flow hole 41, first oil of the connection of spool 4
Mouth B and the second hydraulic fluid port P2, spool 4 are connected to the 4th hydraulic fluid port A and the 5th hydraulic fluid port P1.
In other words, as shown in Figure 1, when 5 no power of electromagnet, spool 4 moves right to valve under the active force of elastic component 2
The right side of core 4 and the concave hole of electromagnet 5 offset, and the 5th hydraulic fluid port P1 is communicated with the 6th hydraulic fluid port C at this time, the second hydraulic fluid port P2 and
Three hydraulic fluid port D are communicated, and the first hydraulic fluid port B by the first relief hole 4a, the 4th hydraulic fluid port A by third relief hole 4c respectively with through flow hole
41 communicate, and through flow hole 41 is communicated with left pressure-releasing chamber 32 and right pressure-releasing chamber 31 respectively, and between left pressure-releasing chamber 32 and the second hydraulic fluid port P2
It is connected with the first check valve 6, is connected with second one-way valve 7 between right pressure-releasing chamber 31 and the 5th hydraulic fluid port P1.If the second hydraulic fluid port P2 be in
Oil return opening communicating state, then the oil liquid of left pressure-releasing chamber 32 and right pressure-releasing chamber 31 is complete by the second hydraulic fluid port P2 of the first check valve 6 inflow
At pressure release；If the 5th hydraulic fluid port P1, which is in, passes through the with oil return opening communicating state, the oil liquid of left pressure-releasing chamber 32 and right pressure-releasing chamber 31
Two check valves 7 flow into the 5th hydraulic fluid port P1 and complete pressure release.
When electromagnet 5 is powered, the stretching of push rod 51 overcomes the active force of elastic component 2 to push spool 4 to the left, then the 5th oil
Mouth P1 is communicated with the 4th hydraulic fluid port A, and the second hydraulic fluid port P2 is communicated with the first hydraulic fluid port B, and the first relief hole 4a and third relief hole 4c are hidden
It covers, and the second relief hole 4b exposing is communicated with third hydraulic fluid port D, the 4th relief hole 4d exposing is communicated with the 6th hydraulic fluid port C, it is non-in this way
Actuator port C and D pass through the 4th relief hole 4d respectively, the second relief hole 4b is communicated with through flow hole 41, so with left pressure-releasing chamber 32
It is communicated with right pressure-releasing chamber 31.If the second hydraulic fluid port P2 be in oil return opening communicating state, left pressure-releasing chamber 32 and right pressure-releasing chamber 31
Oil liquid flows into the second hydraulic fluid port P2 by the first check valve 6 and completes pressure release；If the 5th hydraulic fluid port P1 be in oil return opening communicating state,
The oil liquid of left pressure-releasing chamber 32 and right pressure-releasing chamber 31 flows into the 5th hydraulic fluid port P1 by second one-way valve 7 and completes pressure release.
It is long that Fig. 3 shows one concrete application of a kind of loop choice valve with decompression function according to an embodiment of the present invention
The hydraulic schematic diagram of phase.
Using when by the actuator port A1 of electromagnetic proportional valve 9 and actuator port B1 respectively with the 5th hydraulic fluid port P1, the second hydraulic fluid port
P2 is connected, and the 6th hydraulic fluid port C, third hydraulic fluid port D and the first hydraulic lock 13 are connected, the 4th hydraulic fluid port A, the first hydraulic fluid port B and the second hydraulic lock
14 are connected.
If the work of electromagnetic proportional valve 9 then controls the first oil cylinder 10 and stretches out in right position, electromagnet no power, and the 4th hydraulic fluid port A
It is in pressure release state with the first hydraulic fluid port B, the second hydraulic lock 14 can be very good to close；Terminate when the first oil cylinder 10 stretches out, makes electricity
Magnet electrification, then the piston rod of the second oil cylinder 11 can stretch out, and the 6th hydraulic fluid port C, third hydraulic fluid port D are in pressure release state, and first
Hydraulic lock 13 can be with quick closedown.In short, the hydraulic fluid port quick pressure releasing when present invention can make in off working state, and then make oil
Hydraulic lock and balanced valve quick closedown in road, will not generate the phenomenon that builds the pressure.
A kind of beneficial effect of loop choice valve with decompression function according to an embodiment of the present invention is:
(1) structure is simple, volume compact, easy for installation；
(2) distribution function of hydraulic circuit may be implemented, so as to go to control multiple executive components with one group of control valve,
The number for substantially reducing Hydraulic Elements in hydraulic system, reduces costs；
(3) there is the circuit of N number of executive component due to controlling, only need to N-1 Multi-loop selection valve is in parallel, reconnect one
Electro-hydraulic proportional valve；
(4) due to only one electromagnet of each oil circuit, Multi-loop selection valve is used in the hydraulic circuit of N number of executive component
It will reduce by N-1 electromagnet than in the prior art, and greatly reduce automatically controlled difficulty；
(5) actuator port has decompression function when being in off working state.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (4)
1. a kind of loop choice valve with decompression function characterized by comprising
Valve body has the valve opening for penetrating through the valve body in left-right direction on the valve body, and the left end of the valve opening is configured to a left side and lets out
The right end of pressure chamber and the valve opening is configured to right pressure-releasing chamber, have on the valve body arrangement from left to right and respectively with the valve opening
Connection and the first hydraulic fluid port between the left pressure-releasing chamber and the right pressure-releasing chamber, the second hydraulic fluid port, third hydraulic fluid port, the 4th oil
Mouth, the 5th hydraulic fluid port and the 6th hydraulic fluid port, the left pressure-releasing chamber are connected by the first check valve with second hydraulic fluid port, the right pressure release
Chamber is connected by second one-way valve with the 5th hydraulic fluid port；
Spool, the spool can be movably located in the valve opening, be had described in perforation in left-right direction on the spool
The through flow hole of spool, also have on the spool apart from one another by and respectively be connected to the through flow hole the first relief hole, second
Relief hole, third relief hole and the 4th relief hole；
Left end cap, the left end cap are detachably arranged in the left end that the valve opening is closed on the valve body；
Elastic component, the left end of the elastic component is against the right end of the left end cap and the right end of the elastic component is against the spool
Left end；
Electromagnet, the electromagnet are detachably arranged in the right end that the valve opening is closed on the valve body, the electromagnet
The right end of push rod spool described in face to the left；
When the electromagnet power loss, the push rod is retracted to the right in the electromagnet and the elastic component pushes to the right the valve
Core, at this point, the spool closes first hydraulic fluid port, second relief hole, the 4th hydraulic fluid port and the 4th relief hole,
First relief hole is connected to first hydraulic fluid port and the through flow hole, and the third relief hole is connected to the 4th hydraulic fluid port and institute
Through flow hole is stated, the spool is connected to second hydraulic fluid port and the third hydraulic fluid port, and the spool is connected to the 5th hydraulic fluid port and institute
State the 6th hydraulic fluid port；
When the electromagnet is powered, the push rod stretches out the electromagnet to the left to push the spool to overcome the elastic component
Elastic force be moved to the left, at this point, the spool close first relief hole, the third relief hole, the third hydraulic fluid port and
6th hydraulic fluid port, second relief hole are connected to the third hydraulic fluid port and the through flow hole, and the 4th relief hole is connected to institute
The 6th hydraulic fluid port and the through flow hole are stated, the spool is connected to first hydraulic fluid port and second hydraulic fluid port, and the spool is connected to institute
State the 4th hydraulic fluid port and the 5th hydraulic fluid port；
If the second hydraulic fluid port, which is in, passes through the first check valve stream with oil return opening communicating state, the oil liquid of left pressure-releasing chamber and right pressure-releasing chamber
Enter the second hydraulic fluid port and completes pressure release；If the 5th hydraulic fluid port is in and oil return opening communicating state, the oil liquid of left pressure-releasing chamber and right pressure-releasing chamber
The 5th hydraulic fluid port, which is flowed into, by second one-way valve completes pressure release.
2. the loop choice valve according to claim 1 with decompression function, which is characterized in that the elastic component is bullet
Spring.
3. the loop choice valve according to claim 1 with decompression function, which is characterized in that the left end cap with it is described
Valve body screw thread connection.
4. the loop choice valve according to claim 1 with decompression function, which is characterized in that the electromagnet with it is described
Valve body screw thread connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810409835.0A CN108506267B (en) | 2018-05-02 | 2018-05-02 | A kind of loop choice valve with decompression function |
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| CN201810409835.0A CN108506267B (en) | 2018-05-02 | 2018-05-02 | A kind of loop choice valve with decompression function |
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| CN108506267A CN108506267A (en) | 2018-09-07 |
| CN108506267B true CN108506267B (en) | 2019-11-26 |
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| CN116066622B (en) * | 2023-03-01 | 2023-08-08 | 宁波纽帕得机械有限公司 | Time delay adjusting electromagnetic valve device |
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| CN201425044Y (en) * | 2009-05-19 | 2010-03-17 | 济南液压泵有限责任公司 | Pneumatic reversing valve for dump trucks |
| CN201554709U (en) * | 2009-10-13 | 2010-08-18 | 宁波汉商液压有限公司 | Multi-loop selection valve |
| JP2012193789A (en) * | 2011-03-16 | 2012-10-11 | Kyb Co Ltd | Control valve |
| CN104421463A (en) * | 2013-08-28 | 2015-03-18 | Smc株式会社 | Five-port switching valve with residual pressure exhaust valve |
| CN105864139A (en) * | 2016-05-18 | 2016-08-17 | 山东常林机械集团股份有限公司 | Hydraulic operated directional control valve |
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| CN108506267A (en) | 2018-09-07 |
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Effective date of registration: 20200903 Address after: 422000 Ziyang Road, Zhanqian District, Hongshi railway station, Shaoyang County, Shaoyang City, Hunan Province Patentee after: Shaoyang Baoxing Chemical Equipment Co., Ltd Address before: 315000 188 Jinghua Road, Ningbo high tech Zone, Zhejiang (1493 tower, 041 block B block, modern building, Ningbo harbour). Patentee before: NINGBO ZHENGE HYDRAULIC TECHNOLOGY Co.,Ltd. |