CN109083876A - A kind of balanced loop of the electromagnetism check valve using adjustable cutoff direction - Google Patents
A kind of balanced loop of the electromagnetism check valve using adjustable cutoff direction Download PDFInfo
- Publication number
- CN109083876A CN109083876A CN201811060971.XA CN201811060971A CN109083876A CN 109083876 A CN109083876 A CN 109083876A CN 201811060971 A CN201811060971 A CN 201811060971A CN 109083876 A CN109083876 A CN 109083876A
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- Prior art keywords
- hole
- shell
- spool
- connecting hole
- check valve
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Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
Abstract
A kind of balanced loop of the electromagnetism check valve using adjustable cutoff direction, it includes first shell and second shell interconnected, first shell offers first through hole, second shell offers the 4th connecting hole being connected to first through hole, check valve further includes the first spring with the first spool of the first spool and extruding of first through hole sliding mating, salable 4th connecting hole of first spool, second shell offers the second through-hole, first shell offers the second connecting hole being connected to the second through-hole, and the second connecting hole and the 4th connecting hole are interconnected；Check valve further include: the second spring with the second spool of the second spool and extruding of the second through-hole sliding mating, salable 4th connecting hole of the second spool；The first electromagnet driving device being connected with first shell, the first electromagnet driving device can drive the first spool to be detached from the 4th connecting hole；The second electromagnet driving device being connected with second shell, the second electromagnet driving device can drive the second spool to be detached from the second connecting hole.
Description
Technical field
The present invention relates to check valve, in particular to the balanced loop of a kind of electromagnetism check valve using adjustable cutoff direction.
Background technique
The function of balanced loop is to make to keep certain back pressure value on the oil return line of hydraulic actuator, with balancing gravity
Load, so as not to voluntarily fall because of self weight.Fig. 4 shows a kind of common balanced loop using one way sequence valve, when
1YA obtain it is electric after piston downlink when oil return line on there is certain back pressure；As long as this back pressure tune, which is obtained, can support piston
With the self weight for the workpiece being attached thereto, piston can smoothly fall, and when reversal valve is in middle position, piston just stops
Movement, does not continue to move down.This circuit power loss when piston sharp downward movement is big.
Summary of the invention
It is an object of the invention in view of the above-mentioned drawbacks in the prior art, provide a kind of electricity using adjustable cutoff direction
The balanced loop of magnetic check valve, in piston sharp downward movement, power loss is small.
For achieving the above object, present invention employs following technical solutions: a kind of electricity using adjustable cutoff direction
The balanced loop of magnetic check valve comprising oil pump, fuel tank, hydraulic cylinder, sequence valve, the hydraulic cylinder include communicating with the oil pump
Upper oil cavitie and the lower oil cavitie that is communicated with the sequence valve, the sequence valve communicated with the fuel tank, it is characterised in that: it is described
Balanced loop further includes the electromagnetism check valve in adjustable cutoff direction, the electromagnetism check valve in the adjustable cutoff direction and the sequence
Valve is in parallel.
In addition, the present invention also proposes following attached technical scheme:
The electromagnetism check valve in the adjustable cutoff direction includes first shell and second shell interconnected, and described first
Shell offers first through hole and the second connecting hole, and the second shell is offered to be connect with the 4th of first through hole connection
Hole and the second through-hole being connected to second connecting hole, second connecting hole and the 4th connecting hole are interconnected,
The electromagnetism check valve in the adjustable cutoff direction further include:
With the first spool of first through hole sliding mating and squeeze the first spring of first spool, described the
Salable 4th connecting hole of one spool；
With the second spool of second through-hole sliding mating and squeeze the second spring of second spool, described the
Salable second connecting hole of two spools；
The first electromagnet driving device being connected with the first shell, first electromagnet driving device can drive institute
It states the first spool and is detached from the 4th connecting hole；
The second electromagnet driving device being connected with the second shell, second electromagnet driving device can drive institute
It states the second spool and is detached from second connecting hole.
First electromagnet driving device includes the first armature, is connected between first armature and first spool
There is the first pull rod.
First electromagnet driving device includes the first shell being connected with the first shell and is set to described
One shell is interior and drives the first coil of first armature motion.
First electromagnet driving device further includes being located at outside the first shell and being connected with first armature
First handle.
Second electromagnet driving device includes the second armature, is connected between second armature and second spool
There is the second pull rod.
Second electromagnet driving device further includes the second housing being connected with the second shell and is set to described
Second housing is interior and drives the second coil of second armature motion.
Second electromagnet driving device further includes being located at outside the second shell and being connected with second armature
The first shell offers the first recirculation hole being connected with the first through hole and second connecting hole, the second shell
Body offers the second recirculation hole being connected with second through-hole and the 4th connecting hole, second recirculation hole with it is described
First recirculation hole matches.
The balanced loop of the electromagnetism check valve using adjustable cutoff direction further includes three position four-way directional control valve, described to change
It include the P mouth communicated with the oil pump, the A mouth communicated with the upper oil cavitie and the sequence valve and the adjustable cutoff to valve
The B mouth that the electromagnetism check valve in direction is connected and the T mouth being connected with the fuel tank.
Compared with the prior art, the present invention has the advantages that
1. the balanced loop of the electromagnetism check valve of the invention using adjustable cutoff direction is in the process of piston rapid decrease
In have higher efficiency, power loss is small；
2. change the state of the first spool and the second spool automatically by electromagnet driving device, enable electromagnetism check valve
Enough convenient control prevents the direction of oil liquid reverse flow, and in addition it can reach fully on and cut-off state, function is more
For diversification, also, simple to operate, high reliablity, it is easy to implement automation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of check valve in the present invention.
Fig. 2 is the left view of check valve in Fig. 1.
Fig. 3 is the structural schematic diagram that check valve changes behind current limliting direction in the present invention.
Fig. 4 is the structural schematic diagram of balanced loop in the prior art.
The schematic diagram of balanced loop when Fig. 5 is piston rapid decrease in the present invention.
The schematic diagram of balanced loop when Fig. 6 is piston uniform descent in the present invention.
Specific embodiment
In conjunction with the preferred embodiment and its attached drawing is further non-limitingly described in detail technical solution of the present invention.
As depicted in figs. 1 and 2, corresponding to a kind of electromagnetism check valve in the adjustable cutoff direction of preferred embodiment of the present invention,
It includes first shell 10 and second shell 50 interconnected, and first shell 10 and second shell 50 pass through flanged joint, the
One shell 10 and second shell 50 are respectively arranged with the first flange disk 11 and second flange disk 51 of matching, will by bolt and nut
First shell 10 and second shell 50 tighten together.
The balanced loop of electromagnetism check valve using adjustable cutoff direction of the invention further includes being connected to first shell
The first electromagnet driving device 100 and the second electromagnet driving device 150 on body 10 and second shell 50.
The first through flow hole 12 is offered on the end face of 10 one end of first shell, offers the first connecting hole in the other end face
13 and second connecting hole 14, the first connecting hole 13 of connection and the first of the first through flow hole 12 logical is also provided with inside first shell 10
Hole 15, it is preferred that the first connecting hole 13 and first through hole 15 are coaxially set；Second connecting hole 14 is connected with the first through flow hole 12
It is logical, it is used to connect external oil liquid pipeline.
The structure of second shell 50 is similar with first shell 10, offers on the end face of one end and 12 phase of the first through flow hole
The second through flow hole 52 matched, offers third connecting hole 53 and the 4th connecting hole 54 in the other end face, inside second shell 50
It is also provided with the second through-hole 55 of connection third connecting hole 53 and the 4th connecting hole 54, it is preferred that third connecting hole 53 and second
Through-hole 55 is coaxially set；4th connecting hole 54 is connected with the second through flow hole 52, is used to connect external oil liquid pipeline.
Preferably, after first shell 10 is connected with second shell 50, the second connecting hole 14 and the second through-hole 55 are same
Axis；4th connecting hole 54 and 15 coaxial line of first through hole.
Check valve of the invention further includes the first spool 16, the first retaining the 17, first pull rod 18 of set and the first spring 19.
Wherein, the first spool 16 sliding mating is in first through hole 15, in one embodiment, with first through hole 15
Mating relationship can refer to the mating relationship of oil cylinder piston in the prior art and cylinder body.First spool, 16 one end is provided with salable
First conical surface 71 of the 4th connecting hole 54, the other end offer the first blind hole 70, and the first bottom surface 72 of the first blind hole 70 is also
Offer the first screw hole 73 being threadedly coupled with the first pull rod 18.Lead in radial be also provided with of the first spool 16 with first, second
The first recirculation hole 75 that discharge orifice 12,52 is in fluid communication.
First pull rod, 18 one end is screwed onto the first screw hole 73, and the other end stretches out the first connecting hole 13 and the first electromagnet drives
Dynamic device 100 is connected, and the first electromagnet driving device 100 can pull out first pull rod 18 after being powered, so that the first valve
Core 16 and the 4th connecting hole 54 are detached from.
First connecting hole, 13 surface is provided with screw thread, and the first retaining set 17 is threaded in the first connecting hole 13, and first
Pull rod 18 is threaded through in the first retaining set 17, and the first retaining set 17 is provided with the first supporting surface 74.
First spring 19 be arranged in the first blind hole 70, be set on the first pull rod 18, and both ends respectively with first
Support face 74 and the first bottom surface 72 offset.First spring 19 applies the power to 54 direction of the 4th connecting hole to the first spool 16；So that
In the first 100 no power of electromagnet driving device, the first spool 16 can resist and seal the 4th connecting hole 54；And work as
When first electromagnet driving device 100 is powered, the first electromagnet driving device 100 is able to drive the first spool 16 and is detached from the 4th company
Connect hole 54.
Check valve of the invention further includes the second spool 56, the second retaining the 57, second pull rod 58 of set and second spring 59.
Wherein, the second spool 56 sliding mating is in the second through-hole 55, in one embodiment, with the second through-hole 55
Mating relationship can refer to the mating relationship of oil cylinder piston in the prior art and cylinder body.Second spool, 56 one end is provided with salable
Second conical surface 81 of the 4th connecting hole 54, the other end offer the second blind hole 80, and the second bottom surface 82 of the second blind hole 80 is also
Offer the second screw hole 83 being threadedly coupled with the second pull rod 58.Lead in radial be also provided with of the second spool 56 with first, second
The second recirculation hole 85 that discharge orifice 12,52 is in fluid communication.
Second pull rod, 58 one end is screwed onto the second screw hole 83, and the other end stretches out third connecting hole 53 and the second electromagnet drives
Dynamic device 150 is connected, and the second electromagnet driving device 150 can pull out second pull rod 58 after being powered, so that the second valve
Core 56 and the second connecting hole 14 are detached from.
53 surface of third connecting hole is provided with screw thread, and the second retaining set 57 is threaded in third connecting hole 53, and second
Pull rod 58 is threaded through in the second retaining set 57, and the second retaining set 57 is provided with the second supporting surface 84.
Second spring 59 be arranged in the second blind hole 80, be set on the second pull rod 58, and both ends respectively with second
Support face 84 and the second bottom surface 82 offset.Second spring 59 applies the power to 55 direction of the second through-hole to the second spool 56；So that
When the second 150 no power of electromagnet driving device, the second spool 56 can resist and seal second connecting hole 14；And when the
When two electromagnet driving devices 150 are powered, the second electromagnet driving device 150 is able to drive the second spool 56 and is detached from the second connection
Hole 14.
First electromagnet driving device 100 includes the first shell 101 for being connected to 10 side of first shell, is arranged first
First coil 102 in shell 101, sliding mating driven in first shell 101 and by the first coil 102 the
One armature 103.First armature, 103 one end is connected by first connecting rod 104 and connector sleeve 105 with the first pull rod 18, and the other end is set
It is equipped with second connecting rod 106, second connecting rod 106 extends the first shell 101 and is provided with first handle 107.First coil 102 is logical
After electricity, the first armature 103 of driving is moved out, so that the first spool 16 is disengaged with the 4th connecting hole 54, after power loss, first
(it is techniques known that coil is powered and drives armature motion to homing to spool 16, herein not under spring force
Give detailed description).In addition, in some special circumstances, moreover it is possible to open the first spool 16 by pulling with hand first handle 107.
Second electromagnet driving device 150 exists including being connected to the second housing 151 of 50 side of second shell, being arranged
The second coil 152, sliding mating in second housing 151 drive in the second housing 151 and by second coil 152
The second armature 153.Second armature, 153 one end is connected by third connecting rod 154, connector sleeve 155 with the second pull rod 58, the other end
It is provided with fourth link 156, fourth link 156 extends second housing 151 and is provided with second handle 157.Second coil 152
After energization, the second armature 153 of driving is moved out, so that the second spool 56 is disengaged with the second connecting hole 14, after power loss, the
Two spools 56 homing under spring force.In addition, in some special circumstances, moreover it is possible to by pulling with hand second-hand
Handle 157 opens the second spool 56.
As shown in Figure 1, when 100 power loss of the first electromagnet driving device, when the second electromagnet driving device 150 obtains electric, the
One spool 16 resists the 4th connecting hole 54, and the second spool 56 is disengaged with the second connecting hole 14, at this point, oil liquid connects from the 4th
After connecing the entrance of hole 54, the first spool 16 can be pushed open, and flow out from the second connecting hole 14 by the first, second through flow hole 12,52；And
If oil liquid is flowed into from the second connecting hole 14, the first spool 16 is oppressed due to the first spring 19 and resists the 4th connecting hole 54, oil
The pressure of liquid can further make the first spool 16 press the 4th connecting hole 54, and therefore, oil liquid will be unable to flow into the 4th connecting hole 54,
That is, only oil liquid is allowed to flow into from the second connecting hole 14 at this time, flowed out from the 4th connecting hole 54.
Correspondingly, as shown in Fig. 2, when the first electromagnet driving device 100 obtains electric, the second electromagnet driving device 150 mistake
When electric, the first spool 16 and the 4th connecting hole 54 are detached from, and the second spool 56 and the abutting of the second connecting hole 14, at this point, oil liquid from
After second connecting hole 14 enters, the second spool 56 can be pushed open, and pass through the first, second through flow hole 12,52 from the 4th connecting hole 54
Outflow；And if oppressing the second spool 56 when oil liquid is flowed into from the 4th connecting hole 54 due to second spring 59 and resisting the second connection
The pressure in hole 14, oil liquid can further make the second spool 56 press the second connecting hole 14, and therefore, oil liquid will be unable to flow into the second company
Connect hole 14, that is, only oil liquid is allowed to flow into from the 4th connecting hole 54 at this time, flowed out from the second connecting hole 14.
It will be apparent that when the first, second electromagnet 100,150 it is electric when, the first, second spool 10,50 is in
Opening state, entire valve body is in fully on state at this time；And when the first, second electromagnet driving device 100,150 is equal
When power loss, the first, second spool 10,50 is abutted with the 4th connecting hole 54 and the second connecting hole 14 respectively, at this point, at entire valve body
In completely switched off state, that is, it is disconnected oil circuit.
Fig. 5 and Fig. 6 shows balanced loop of the invention, and it uses the electromagnetism check valves in above-mentioned adjustable cutoff direction
200 (electromagnetism check valve 200 is illustrated with rectangle frame and its interior check valve), electromagnetism check valve 200 is substituted general in Fig. 4 in figure
Logical check valve, the second connecting hole 14 of electromagnetism check valve 200 pass through 203 phase of lower oil cavitie of the first pipeline 201 and hydraulic cylinder 202
Connect, and the 4th connecting hole 54 is connected with the B of reversal valve 204 mouth.
When needing to make 205 rapid decrease of piston, obtain the first electromagnet driving device 100 of electromagnetism check valve 200 electric,
Second electromagnet driving device, 150 power loss, hydraulic schematic diagram is as shown in figure 5, oil liquid can flow into warp from the second connecting hole 14 at this time
The outflow of 4th connecting hole 54.The solenoid valve 1YA of reversal valve 204 obtain it is electric, oil liquid from P mouthfuls enter A mouthful and through the second pipeline 206 entrance
In upper oil cavitie 207, the oil liquid of lower oil cavitie 203 enters the second connecting hole 14 from the first pipeline 201, and flows through the 4th connecting hole 54
Out, the resistance of pilot sequencing valve 208 is flowed through since the resistance that oil liquid at this time flows through electromagnetism check valve 200 is much smaller than, piston
205 can also have very high efficiency when drop at the fast speed, and power loss is small.
When needing piston 205 to need steady fall, lose the first electromagnet driving device 100 of electromagnetism check valve 200
Electricity, the second electromagnet driving device 150 must be electric, and hydraulic schematic diagram is as shown in fig. 6, oil liquid can not be flowed from the second connecting hole 14 at this time
Enter and flowed out through the 4th connecting hole 54, the oil liquid of lower oil cavitie 203 can only flow into B mouthfuls from pilot sequencing valve 208, and oily from B mouthfuls of inflows
Case 209.
In this way, can easily control work by the energized state for simply adjusting the first, second electromagnet 100,150
Plug 205 is steady or hurtles down.
The present invention at least has following advantages:
1. the balanced loop of the electromagnetism check valve of the invention using adjustable cutoff direction is in the process of piston rapid decrease
In have higher efficiency, power loss is small；
2. change the state of the first spool and the second spool automatically by electromagnet driving device, enable electromagnetism check valve
Enough convenient control prevents the direction of oil liquid reverse flow, and in addition it can reach fully on and cut-off state, function is more
For diversification, also, simple to operate, high reliablity, it is easy to implement automation.
It is pointed out that the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to
Those skilled in the art can understand the contents of the present invention and implements accordingly, and protection of the invention can not be limited with this
Range.Any equivalent change or modification in accordance with the spirit of the invention should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of balanced loop of the electromagnetism check valve using adjustable cutoff direction comprising oil pump (210), fuel tank (209), liquid
Cylinder pressure (202), sequence valve (208), the hydraulic cylinder (202) include the upper oil cavitie (207) communicated with the oil pump (210) and
The lower oil cavitie (203) communicated with the sequence valve (208), the sequence valve (208) communicate with the fuel tank (209), feature
Be: the balanced loop further includes the electromagnetism check valve (200) in adjustable cutoff direction, the electromagnetism list in the adjustable cutoff direction
It is in parallel with the sequence valve (208) to valve (200).
2. according to a kind of balanced loop of electromagnetism check valve using adjustable cutoff direction described in claim 1, it is characterised in that:
The electromagnetism check valve in the adjustable cutoff direction includes first shell interconnected (10) and second shell (50), and described first
Shell (10) offers first through hole (15) and the second connecting hole (14), and the second shell (50) offers leads to described first
4th connecting hole (54) of hole (15) connection and the second through-hole (55) being connected to second connecting hole (14), described second
Connecting hole (14) and the 4th connecting hole (54) are interconnected,
The electromagnetism check valve in the adjustable cutoff direction further include:
With the first spool (16) of the first through hole (15) sliding mating and the first bullet of extruding first spool (16)
Spring (19), salable 4th connecting hole (54) of the first spool (16)；
With the second spool (56) of second through-hole (55) sliding mating and the second bullet of extruding second spool (50)
Spring (59), salable second connecting hole (14) of the second spool (56)；
The first electromagnet driving device (100) being connected with the first shell (10), first electromagnet driving device
(100) first spool (16) can be driven to be detached from the 4th connecting hole (54)；
The second electromagnet driving device (150) being connected with the second shell (50), second electromagnet driving device
(150) second spool (56) can be driven to be detached from second connecting hole (14).
3. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 2, it is characterised in that: described
First electromagnet driving device (100) includes the first armature (103), first armature (103) and first spool (16)
Between be connected with the first pull rod (18).
4. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 3, it is characterised in that: described
First electromagnet driving device (100) includes the first shell (101) being connected with the first shell (10) and is set to described
First shell (101) is interior and drives the first coil (102) of the first armature (103) movement.
5. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 4, it is characterised in that: described
First electromagnet driving device (100) further include be located at the first shell (10) it is external and with the first armature (103) phase
First handle (107) even.
6. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 2, it is characterised in that: described
Second electromagnet driving device (150) includes the second armature (153), second armature (153) and second spool (56)
Between be connected with the second pull rod (58).
7. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 5, it is characterised in that: described
Second electromagnet driving device (150) further includes the second housing (151) being connected with the second shell (10) and is set to institute
State the second coil (152) that in second housing (151) and driving second armature (153) moves.
8. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 7, it is characterised in that: described
Second electromagnet driving device (150) further include be located at the second shell (10) it is external and with the second armature (153) phase
Second handle (157) even.
9. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 2, it is characterised in that: described
First shell (10) offers the first recirculation hole being connected with the first through hole (15) and second connecting hole (14)
(75), the second shell (50) offers second to be connected with second through-hole (55) and the 4th connecting hole (54)
Recirculation hole (85), second recirculation hole (85) match with first recirculation hole (75).
10. according to the balanced loop for the electromagnetism check valve for using adjustable cutoff direction described in claim 1, it is characterised in that: its
Further include three position four-way directional control valve (204), the reversal valve (204) include the P mouth communicated with the oil pump (210), with it is described
A mouth that upper oil cavitie (207) communicates is connected with the electromagnetism check valve (200) in the sequence valve (208) and the adjustable cutoff direction
Logical B mouth and the T mouth being connected with the fuel tank (209).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060971.XA CN109083876B (en) | 2018-09-12 | 2018-09-12 | Balance loop using electromagnetic one-way valve with adjustable stopping direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060971.XA CN109083876B (en) | 2018-09-12 | 2018-09-12 | Balance loop using electromagnetic one-way valve with adjustable stopping direction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109083876A true CN109083876A (en) | 2018-12-25 |
| CN109083876B CN109083876B (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811060971.XA Active CN109083876B (en) | 2018-09-12 | 2018-09-12 | Balance loop using electromagnetic one-way valve with adjustable stopping direction |
Country Status (1)
| Country | Link |
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| CN (1) | CN109083876B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051966A1 (en) * | 2018-09-12 | 2020-03-19 | 苏州丹顿机电有限公司 | Electromagenetic check valve with adjustable cutoff direction |
| WO2020051965A1 (en) * | 2018-09-12 | 2020-03-19 | 苏州丹顿机电有限公司 | Check valve with adjustable cutoff direction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2032581A (en) * | 1978-10-24 | 1980-05-08 | Mac Valves Inc | Combined pressure reducer and flow control valve |
| CN202501051U (en) * | 2011-12-23 | 2012-10-24 | 上海立新液压有限公司 | Electromagnetic control non-return valve |
| DE102014016701A1 (en) * | 2014-11-12 | 2016-05-12 | Festo Ag & Co. Kg | Controllable check valve |
| CN106704313A (en) * | 2016-12-16 | 2017-05-24 | 上海中联重科桩工机械有限公司 | Rotary drilling rig, mast hydraulic control system and mast lifting up/ down control method |
-
2018
- 2018-09-12 CN CN201811060971.XA patent/CN109083876B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2032581A (en) * | 1978-10-24 | 1980-05-08 | Mac Valves Inc | Combined pressure reducer and flow control valve |
| CN202501051U (en) * | 2011-12-23 | 2012-10-24 | 上海立新液压有限公司 | Electromagnetic control non-return valve |
| DE102014016701A1 (en) * | 2014-11-12 | 2016-05-12 | Festo Ag & Co. Kg | Controllable check valve |
| CN106704313A (en) * | 2016-12-16 | 2017-05-24 | 上海中联重科桩工机械有限公司 | Rotary drilling rig, mast hydraulic control system and mast lifting up/ down control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051966A1 (en) * | 2018-09-12 | 2020-03-19 | 苏州丹顿机电有限公司 | Electromagenetic check valve with adjustable cutoff direction |
| WO2020051965A1 (en) * | 2018-09-12 | 2020-03-19 | 苏州丹顿机电有限公司 | Check valve with adjustable cutoff direction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109083876B (en) | 2020-05-01 |
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