CN108061069A - Buffer overflow valve - Google Patents
Buffer overflow valve Download PDFInfo
- Publication number
- CN108061069A CN108061069A CN201711375273.4A CN201711375273A CN108061069A CN 108061069 A CN108061069 A CN 108061069A CN 201711375273 A CN201711375273 A CN 201711375273A CN 108061069 A CN108061069 A CN 108061069A
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- Prior art keywords
- spring
- valve
- damper piston
- bushing
- valve body
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Classifications
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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
- F15B13/029—Counterbalance valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention relates to a kind of buffer overflow valve, the valve body including being provided with auxiliary oil drainage mouth；Valve pocket equipped with pressure oil port and drain tap；Main valve plug；Bushing is supported by the first spring and forms first guide cavity between bushing and main valve plug, the first damping hole is equipped in main valve plug；Damper piston, bushing top form oil back chamber, are provided with the 3rd damping hole on damper piston, runner, the first through flow hole are provided in bushing, the first through flow hole is fixed with the first spring base for being provided with the second damping hole, control oilhole is provided on body wall；Second spring seat, the 3rd spring base, back pressure spool, second spring, the 3rd spring and the 5th spring, the lower end of second spring seat in damper piston are fixed with the first steel ball, and the bottom of back pressure spool is fixed with the second steel ball；Cushion chamber is formed between adjusting set and damper piston, the top of damper piston is provided with the 4th damping hole.This overflow valve has the advantages that the flow of overflow greatly and can effectively shock absorbing pressure, and can realize and conveniently be remotely controlled unloading control.
Description
Technical field
Technical field more particularly to a kind of buffer overflow valve the invention belongs to hydraulic valve.
Background technology
In the slewing equipment of existing machinery equipment, the hydraulic circuit with pooling feature, such as excavator have been widely applied
Slewing equipment, crane rotation device, high-altitude operation vehicle slewing equipment, manipulator slewing equipment and agriculture and forestry machinery slewing equipment
Deng wherein buffer overflow valve is the key that this kind of system Hydraulic Elements, and the quality of buffer overflow valve performance directly affects host
Performance.Existing buffer overflow valve is divided into two kinds of board-like buffer overflow valve and plug-in buffer overflow valve by connection mode,
In order to reduce installation space in system, system reliability is improved, generally using plug-in buffer overflow valve.As Authorization Notice No. is
" CN 202073860 ", the patent of entitled " threaded plug-in adjustable buffer overflow valve ", discloses a kind of buffer overflow valve,
Including valve pocket, valve seat, spool, spring and damper piston, valve pocket has the first hydraulic fluid port, and valve seat is arranged on the front end of valve pocket and has
Second hydraulic fluid port, spool be arranged on valve pocket in, pressure regulation swivel nut have front end inner cavity, can simultaneously be moved axially arranged on the rear end portion of valve pocket and then
The axial elastic force of spring can be changed, it is axial that damper piston includes the guide part of rear end, the projecting ring section of middle part radial protrusion and front end
Opening and the volumetric cylinder portion of spool rear end portion cooperation, the rear end face of projecting ring section are more than front end face, have among projecting ring section for fluid from
Volumetric cylinder portion flows to the interface channel on the outside of rear end, and volumetric cylinder portion laterally has to be flowed to for the calm canister portion inner cavity of fluid to volumetric cylinder portion outer wall
Side path.Although background patents can realize simple buffering relief function, it has the following disadvantages：
It is Direct Action Type buffer overflow valve, and through-current capability is small, and fever is severe, is not suitable for the slewing equipment of big flow.
It sets up the first stage pressure by Adjusting bolt Adjusting screw, and the pressure of the second hydraulic fluid port rose rapidly to the first stage pressure before this
Overflow, spring is compressed second mouthful of pressure rise to the second stage pressure by simultaneous buffering piston again, although passing through first
The switching of stage pressure and the second stage pressure can be such that slewing equipment slowly starts, but because the damping hole drop that its valve core inside is set
The low opening speed of spool, the first stage pressure equally exists overshoot impact, for the tooth in some accurate slewing equipments
Wheel or motor have great danger of burst；If the first stage pressure turned down, the second hydraulic fluid port pressure is on the one hand likely to cause
Too low, too low first order insufficient pressure is to promote damper piston to compress spring, buffer overflow valve disabler, on the other hand this
The structure of invention will shorten the stroke of damper piston, so if damper piston can compress spring, the second stage pressure
Reduce the service pressure that slewing equipment is not achieved.
In the invention, no remote control mouth.Some slewing equipments application in, it is necessary to remotely by automatically controlled button according to
The angle of slewing equipment carries out urgent off-load, and such words the invention needs the unloading electromagnetic valve of big flow in parallel, adds into
This.
In conclusion existing buffer overflow valve can be further improved.
The content of the invention
The technical problems to be solved by the invention be for the above-mentioned prior art present situation and provide a kind of structure it is more reasonable,
The flow of overflow is big and can effectively shock absorbing pressure, the buffer overflow valve with remote control mouth.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of buffer overflow valve, it is characterised in that：Bag
It includes with the valve body for axially penetrating through hole；It with the valve pocket for axially penetrating through hole, is connected in the lower port of valve body, valve pocket periphery and valve
There is the first gap among internal hole, the lower port of valve pocket forms pressure oil port, drain tap, the side wall of valve body are provided on valve pocket peripheral wall
On be provided with the auxiliary oil drainage mouth communicated with the first gap, be formed in valve pocket connection pressure oil port and drain tap overflow valve port；
Main valve plug can slide in valve pocket and up and down, and outer circumferential surface and the overflow valve port of main valve plug coordinate, so that the upper downslide of main valve plug
Shifting can open and close overflow valve port；Bushing, its upper part are arranged in valve body and sealing ring are equipped between valve interior wall, and the lower part of bushing is inserted
Enter in valve pocket and sealing ring is equipped between valve sleeving inner wall, the first spring, bushing and main valve are supported by between bushing and main valve plug
First guide cavity is formed between core, connection the first damping hole of first guide cavity and pressure oil port is equipped in main valve plug；Buffering with accommodating cavity
Piston can slide in valve body and up and down, and sealing ring is equipped between the upper periphery and valve interior wall of damper piston, and buffering is lived
Between the lower, outer perimeter and valve interior wall of plug have the second gap, bushing upper end insertion damper piston in and in damper piston
Sealing ring is equipped between wall, to form oil back chamber in the damper piston above bushing, connection is provided on the side wall of damper piston
Oil back chamber and the 3rd damping hole in the second gap are provided with the runner in the first gap of connection and the second gap in bushing and connect back
First through flow hole of oil pocket and first guide cavity, the lower end of the first through flow hole are fixed with the first spring base, the company of being provided on the first spring base
Lead to the second damping hole of elder generation's guide cavity and the first through flow hole, control oilhole is provided on body wall, control oilhole is by external electromagnetism
Valve control its whether pressure release, bushing be provided with connection control oilhole and the first through flow hole side runner；It is sequentially arranged in from bottom to top slow
Second spring seat, the 3rd spring base and the back pressure spool that can be slid in piston and up and down are rushed, is propped up between second spring seat and bushing
Support has second spring, and the lower end of second spring seat is fixed with to block the first steel ball of first through flow hole, second spring
The 3rd spring is supported by between seat and the 3rd spring base, the second through flow hole, the top top of back pressure spool are provided on the 3rd spring base
Hold the 5th spring, be provided with to connect the threeway discharge orifice of the second through flow hole and the second gap on the side wall of damper piston, carry on the back
The bottom of pressure valve core is fixed with to block the second steel ball of the second through flow hole；Adjusting set, the upper end for being threaded in valve body are opened
It at mouthful and is blocked, sealing ring is equipped between adjusting set periphery and valve interior wall, formed between adjusting set and damper piston slow
Chamber is rushed, the top of damper piston is provided with the 4th damping hole of connection cushion chamber and oil back chamber.
Background patents are all using a spring, because valve port opening is limited, it is impossible to it is too big, so what background patents were set up
First segment pressure is also very high, it is impossible to more preferably the pressure of control be allowed slowly to rise, for this problem, the application is above-mentioned second
The 4th spring is further supported between spring base and the 3rd spring base, the 4th spring is located in the 3rd spring.In 4th spring is formed
Coil spring, the purpose of the 4th spring is in order to which the 3rd spring as cycle spring is allowed to be in drift, and interior coil spring is just opened
Begin only there are one the active force of very little, when such damper piston compresses spring, can be slowly increase active force controls
Pressure be also slowly to rise.
To prevent the 5th spring of excessive condensation, the top of above-mentioned damper piston has the T connector portion upwardly extended, adjusting set
Lower end be equipped with the T-slot hung for the T connector portion at the top of damper piston.The upper T type head of damper piston and and adjusting set
After offseting, because adjusting set position is fixed, even if therefore damper piston oil pressure effect under will not be further continued for moving down, effectively prevent from delaying
Each spring of piston excessive compression is rushed, plays the role of protecting spring.
To cause compensator or trimmer pressure convenient for adjusting, the tip male thread of above-mentioned valve body is connected with nut, the adjusting set it is upper
End, which has, adjusts thread rod part, adjusts thread rod part and is pierced by and is threaded on nut, and in the adjusting spiral shell outside nut
Rasp bar is threaded with locking nut in portion.
Compared with prior art, the advantage of the invention is that：This buffer overflow valve has through-flow flow big and can be effective
The advantages of shock absorbing pressure, and can realize and conveniently be remotely controlled unloading control.Specifically, the first steel ball and second spring seat are
It is fixedly connected, forms pilot valve, pilot valve is under the action of second spring 8, the 3rd spring, the 4th spring in opening the
The original state of one through flow hole, pilot valve slowly move downward from opening and close the first through flow hole, buffer initial pressure
It is smaller；Back pressure spool and the 5th spring can ensure that spring cavity has certain return oil pressure, can reliably ensure damper piston
It moves downward, control port can control first guide cavity pressure release or cut-off so as to fulfill long-range by external low-flow electromagnetic valve
Remote control.
Description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is enlarged drawing at A in Fig. 1；
Fig. 3 is enlarged drawing at the B in Fig. 1；
Fig. 4 is the hydraulic schematic diagram of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figures 1 to 3, it is a preferred embodiment of the present invention.
A kind of buffer overflow valve, including
With the valve body 1 for axially penetrating through hole.
It with the valve pocket 3 for axially penetrating through hole, is connected to by clamp spring in the lower port of valve body 1,3 periphery of valve pocket and valve body 1
There is the first gap 4a among endoporus, the lower port of valve pocket 3 forms pressure oil port P, drain tap T1, valve body 1 are provided on 3 peripheral wall of valve pocket
Side wall on be provided with the auxiliary oil drainage mouth T2 communicated with the first gap 4a, connection pressure oil port P and drain tap is formed in valve pocket 3
The overflow valve port 31 of T1.
Main valve plug 2 can slide in valve pocket 3 and up and down, and outer circumferential surface and the overflow valve port 31 of main valve plug 2 coordinate, so that
The sliding up and down of main valve plug 2 can open and close overflow valve port 31.
Bushing 6, its upper part are arranged in valve body 1 and sealing ring 10 are equipped between 1 inner wall of valve body, and the lower part of bushing 6 is inserted into
Sealing ring 10 is equipped in valve pocket 3 and between 3 inner wall of valve pocket, the first spring 5a, bushing 6 are supported by between bushing 6 and main valve plug 2
First guide cavity 21 is formed between main valve plug 2, the first guide cavity 21 of connection and the first damping holes of pressure oil port P a1 are equipped in main valve plug 2.
Damper piston 8 with accommodating cavity can slide in valve body 1 and up and down, the upper periphery and valve of damper piston 8
Sealing ring 10 is equipped between 1 inner wall of body, there is the second gap 4b between 1 inner wall of lower, outer perimeter and valve body of damper piston 8, it is described
Sealing ring 10 is equipped in the upper end insertion damper piston 8 of bushing 6 and between 8 inner wall of damper piston, with slow above bushing 6
It rushes and oil back chamber 20 is formed in piston 8, the 3rd damping of 20 and second gap 4b of connection oil back chamber is provided on the side wall of damper piston 8
Hole a3 is provided with the runner 61 of connection the first gap 4a and the second gap 4b and connection oil back chamber 20 and first guide cavity 21 in bushing 6
First through flow hole 62, the lower end of the first through flow hole 62, which is fixed on the first spring base 7a, the first spring base 7a, is provided with connection guide
Second damping hole a2 of 21 and first through flow hole 62 of chamber is provided with control oilhole X on 1 side wall of valve body, and oilhole X is by external electricity for control
Magnet valve control its whether pressure release, bushing 6 be provided with connection control oilhole X and the first through flow hole 62 side runner 63.
Be sequentially arranged in from bottom to top second spring seat 7b, the 3rd spring base 7c that can slide in damper piston 8 and up and down and
Back pressure spool 11, is supported by second spring 5b between second spring seat 7b and bushing 6, the lower end fixation of second spring seat 5b is useful
To block the first steel ball 9a of first through flow hole 62, the 3rd bullet is supported by between second spring seat 7b and the 3rd spring base 7c
Spring 5c and the 4th spring 5d, the 4th spring 5d are located in the 3rd spring 5c.The second through flow hole 71 is provided on 3rd spring base 7c, is carried on the back
The top of pressure valve core 11 has held the 5th spring 5e, is provided with to connect the second through flow hole 71 and on the side wall of damper piston 8
The threeway discharge orifice 81 of two gap 4a, the bottom of back pressure spool 11 are fixed with to block the second steel of second through flow hole 71
Ball 9b.
Adjusting set 12 is threaded at the upper end opening of valve body 1 and is blocked, in 12 periphery of adjusting set and valve body 1
Sealing ring 10 is equipped between wall, cushion chamber 22 is formed between adjusting set 12 and damper piston 8, the top of damper piston 8 is provided with company
4th damping hole a4 of logical cushion chamber 22 and oil back chamber 20.
The top of damper piston 8 has the T connector portion 81 upwardly extended, and the lower end of adjusting set 12 is equipped with for damper piston top
The T-slot 121 that the T connector portion 81 in portion is hung.The tip male thread of valve body 1 is connected with nut 13, and the upper end of adjusting set 12 has
Thread rod part 122 is adjusted, thread rod part 122 is adjusted and is pierced by and is threaded on nut 13, and in the tune outside nut 13
Locking nut 14 is threaded on section thread rod part 122.
The operation principle and process of this buffer overflow valve are as follows：
First steel ball 9a and second spring seat 7b form pilot valve to be fixedly connected, pilot valve second spring 5b,
In the original state for opening the first through flow hole 62 under the action of 3rd spring 5c, the 4th spring 5d；Back pressure spool 11 and the 5th
Spring 5e can ensure that spring cavity 20 has certain return oil pressure, and control port X can pass through external low-flow electromagnetic valve control
First 21 pressure release of guide cavity of system or cut-off.
So when the fluid of pressure oil port P flows into, the fluid of pressure oil port P is first by the first damping hole a1 to first guide cavity
21, then oil back chamber 20 is reached through the first through flow hole 62 by the second damping hole a2, the fluid of oil back chamber 20 again by the 3rd damping hole a3,
Runner 61, the first gap 4a return auxiliary pressure relief opening T2, and main valve plug 2 is because the flowing generated between pressure oil port P and first guide cavity 21
Pressure difference is opened, and the fluid of pressure oil port P flows into pressure relief opening T, but because the 3rd damping hole a3 and back pressure spool via overflow valve port
11 and the 5th spring 5e effect so that oil back chamber 20 by certain initial pressure (control port X is under cut-off state), this
Initial pressure can compress damper piston 8 and move downward, and the pressure of pressure oil port P is in the not compression spring downwards of damper piston 8
Slightly larger than initial pressure.If the external electrical magnet valve of control port X is in opening state at this time, that is, first guide cavity 21 is let out
Pressure condition, then the fluid of first guide cavity 21 can also be via there is control port X to carry out off-load, the pressure base of first guide cavity 21 after side runner 63
This is 0, and main valve plug 2 is all turned on.
If the external electrical magnet valve of control port X is in cut-off state, control port X will not carry out off-load, then oil back chamber 20
And the pressure of first guide cavity 21 is essentially the initial pressure that counterbalance valve 11 is determined.The fluid of oil back chamber 20 is again by the 4th damping hole a4
Into cushion chamber 22, damper piston 8 progressively moves downward compression pilot valve under the action of initial pressure and upper and lower difference in areas
Core, second spring 5b, the 3rd spring 5c, the 4th spring 5d, the pressure of such pressure oil port P can slowly rise, the pressure of rising
Continue to be applied to damper piston 8 makes damper piston 8 continue to move downward above, until the upper T type head 81 of damper piston 8 with
The T-slot 121 of adjusting set 17 offsets, and the pressure of such pressure oil port P can slowly and finally rise to the work of the setting of adjusting set 12
Make pressure.When the pressure of oil back chamber 20 is more than the pressure of back pressure spool 11, the second steel ball 9b of back pressure spool 11 is moved up, and is opened
Second through flow hole 71, the fluid of such oil back chamber 20 is simultaneously through the 3rd damping hole a3 and back pressure spool 15, the second through flow hole 71, the
Auxiliary pressure relief opening T2 is returned after threeway discharge orifice 81, the second gap 4b, 61 and first gap 4a of runner.
Therefore the oil pressure of pressure oil port P, (initial pressure can be with very little) gradually rises under initial pressure, is finally reached work
Make pressure, whole process is without impact.And because flow mainly passes through main valve plug 2 into row buffering overflow, through-current capability is big, fever
It is small.
Claims (4)
1. a kind of buffer overflow valve, it is characterised in that：Including
With the valve body (1) for axially penetrating through hole；
It with the valve pocket (3) for axially penetrating through hole, is connected in the lower port of valve body (1), valve pocket (3) periphery and valve body (1) endoporus
There is the first gap (4a) in centre, and the lower port of valve pocket (3) forms pressure oil port (P), drain tap is provided on valve pocket (3) peripheral wall
(T1), the auxiliary oil drainage mouth (T2) communicated with the first gap (4a), the interior company of being formed with of valve pocket (3) are provided on the side wall of valve body (1)
The overflow valve port (31) of logical pressure oil port (P) and drain tap (T1)；
Main valve plug (2) can slide in valve pocket (3) and up and down, and outer circumferential surface and the overflow valve port (31) of main valve plug (2) coordinate,
So that the sliding up and down of main valve plug (2) can open and close overflow valve port (31)；
Bushing (6), its upper part is arranged in valve body (1) and sealing ring (10) is equipped between valve body (1) inner wall, under bushing (6)
Sealing ring (10) is equipped in portion's insertion valve pocket (3) and between valve pocket (3) inner wall, is supported by between bushing (6) and main valve plug (2)
First spring (5a) forms first guide cavity (21) between bushing (6) and main valve plug (2), the first guide cavity of connection is equipped in main valve plug (2)
(21) and the first damping hole of pressure oil port (P) (a1)；
Damper piston (8) with accommodating cavity can slide in the valve body (1) and up and down, the upper periphery of damper piston (8) and
Sealing ring (10) is equipped between valve body (1) inner wall, has second between the lower, outer perimeter of damper piston (8) and valve body (1) inner wall
Gap (4b), the upper end insertion damper piston (8) of the bushing (6) is interior and sealing ring is equipped between damper piston (8) inner wall
(10), to form oil back chamber (20) in the damper piston (8) above bushing (6), connection is provided on the side wall of damper piston (8)
3rd damping hole (a3) of oil back chamber (20) and the second gap (4b), bushing (6) is interior to be provided with connection the first gap (4a) and second
The runner (61) and connection oil back chamber (20) in gap (4b) and the first through flow hole (62) of first guide cavity (21), the first through flow hole
(62) lower end is fixed with the first spring base (7a), and the first guide cavity (21) of connection and the first through flow hole are provided on the first spring base (7a)
(62) the second damping hole (a2) is provided with control oilhole (X) on valve body (1) side wall, and control oilhole (X) is by external solenoid valve control
Make its whether pressure release, bushing (6) be provided with connection control oilhole (X) and the first through flow hole (62) side runner (63)；
Second spring seat (7b), the 3rd spring base (7c) that can be slid in damper piston (8) and up and down are sequentially arranged in from bottom to top
With back pressure spool (11), second spring (5b) is supported by between second spring seat (7b) and bushing (6), second spring seat (7b)
Lower end is fixed with to block the first steel ball (9a) of first through flow hole (62), second spring seat (7b) and the 3rd spring base
The 3rd spring (5c) is supported by between (7c), the second through flow hole (71) is provided on the 3rd spring base (7c), back pressure spool (11)
Top has held the 5th spring (5e), is provided with to connect between the second through flow hole (71) and second on the side wall of damper piston (8)
The threeway discharge orifice (81) of gap (4a), the bottom of back pressure spool (11) are fixed with to block the of second through flow hole (71)
Two steel balls (9b)；
Adjusting set (12), is threaded at the upper end opening of valve body (1) and is blocked, adjusting set (12) periphery and valve body
(1) sealing ring (10) is equipped between inner wall, cushion chamber (22), damper piston are formed between adjusting set (12) and damper piston (8)
(8) top is provided with the 4th damping hole (a4) of connection cushion chamber (22) and oil back chamber (20).
2. buffer overflow valve according to claim 1, it is characterised in that：The second spring seat (7b) and the 3rd spring base
The 4th spring (5d) is further supported between (7c), the 4th spring (5d) is located in the 3rd spring (5c).
3. buffer overflow valve according to claim 1, it is characterised in that：The top of the damper piston (8) has upward
The T connector portion (81) of extension, the lower end of adjusting set (12) are equipped with the T-slot hung for the T connector portion (81) at the top of damper piston
(121)。
4. buffer overflow valve according to claim 1, it is characterised in that：The tip male thread of the valve body (1) is connected with
Nut (13), the upper end of the adjusting set (12), which has, adjusts thread rod part (122), adjusts thread rod part (122) and is pierced by simultaneously spiral shell
Line is connected on nut (13), and is being threaded with locking nut on the outer adjusting thread rod part (122) of nut (13)
(14)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711375273.4A CN108061069B (en) | 2017-12-19 | 2017-12-19 | Buffer overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711375273.4A CN108061069B (en) | 2017-12-19 | 2017-12-19 | Buffer overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108061069A true CN108061069A (en) | 2018-05-22 |
| CN108061069B CN108061069B (en) | 2019-11-15 |
Family
ID=62139552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711375273.4A Active CN108061069B (en) | 2017-12-19 | 2017-12-19 | Buffer overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108061069B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953709A (en) * | 2018-09-27 | 2018-12-07 | 邵延荣 | A kind of unloading valve |
| CN109026887A (en) * | 2018-10-17 | 2018-12-18 | 邵玉刚 | A kind of trimmer valve |
| CN109185253A (en) * | 2018-10-22 | 2019-01-11 | 陈少同 | A kind of electromagnetic relief valve |
| CN110259751A (en) * | 2019-07-15 | 2019-09-20 | 宁波克泰液压有限公司 | Threaded insertion pilot is pressurized second level overflow valve |
| CN111660439A (en) * | 2020-06-16 | 2020-09-15 | 邵立坤 | Motor control device for concrete mixer truck |
| CN113638932A (en) * | 2021-07-29 | 2021-11-12 | 中国人民解放军海军工程大学 | Hydraulic control impact load transmitting valve |
| CN114278636A (en) * | 2021-12-29 | 2022-04-05 | 潍柴动力股份有限公司 | Hydraulic system and second-order buffer overflow valve device thereof |
| CN118443557A (en) * | 2024-07-05 | 2024-08-06 | 四川省第六地质大队 | Expansion water stop plug device for pressurized water test |
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| CN108953709A (en) * | 2018-09-27 | 2018-12-07 | 邵延荣 | A kind of unloading valve |
| CN108953709B (en) * | 2018-09-27 | 2019-08-23 | 上海江浪科技股份有限公司 | A kind of unloading valve |
| CN109026887A (en) * | 2018-10-17 | 2018-12-18 | 邵玉刚 | A kind of trimmer valve |
| CN109185253A (en) * | 2018-10-22 | 2019-01-11 | 陈少同 | A kind of electromagnetic relief valve |
| CN109185253B (en) * | 2018-10-22 | 2020-04-21 | 杭州诚臻工程机械有限公司 | Electromagnetic overflow valve |
| CN110259751A (en) * | 2019-07-15 | 2019-09-20 | 宁波克泰液压有限公司 | Threaded insertion pilot is pressurized second level overflow valve |
| CN111660439A (en) * | 2020-06-16 | 2020-09-15 | 邵立坤 | Motor control device for concrete mixer truck |
| CN113638932A (en) * | 2021-07-29 | 2021-11-12 | 中国人民解放军海军工程大学 | Hydraulic control impact load transmitting valve |
| CN114278636A (en) * | 2021-12-29 | 2022-04-05 | 潍柴动力股份有限公司 | Hydraulic system and second-order buffer overflow valve device thereof |
| CN114278636B (en) * | 2021-12-29 | 2024-08-16 | 潍柴动力股份有限公司 | Hydraulic system and second-order buffering overflow valve device thereof |
| CN118443557A (en) * | 2024-07-05 | 2024-08-06 | 四川省第六地质大队 | Expansion water stop plug device for pressurized water test |
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