CN112664659A - Cut-off valve - Google Patents
Cut-off valve Download PDFInfo
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- CN112664659A CN112664659A CN202110002316.4A CN202110002316A CN112664659A CN 112664659 A CN112664659 A CN 112664659A CN 202110002316 A CN202110002316 A CN 202110002316A CN 112664659 A CN112664659 A CN 112664659A
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Abstract
The application relates to a cut-off valve, the inside of the oil circuit block is provided with a cavity for installing a valve core assembly, the oil circuit block is also provided with a liquid inlet hole and a liquid outlet hole which are communicated with the cavity and the outside of the oil circuit block, and the oil circuit block is also provided with a control cavity communicated with the liquid inlet hole; the valve core assembly comprises an outer valve core fixedly arranged in the cavity, an inner valve core arranged in the outer valve core and a compression spring of which two ends are respectively abutted against the inner valve core and the inner wall of the control cavity; the inner valve core can move along the axial direction of the outer valve core, and one end of the inner valve core close to the liquid inlet hole can seal one end of the outer valve core close to the liquid inlet hole. The liquid supply system has the effect of stably closing the liquid supply pipeline with pipe explosion in the liquid supply system with large flow and high pressure.
Description
Technical Field
The application relates to the field of valves, in particular to a cut-off valve.
Background
The automatic control emulsion pump station system comprises a liquid supply pipeline, and emulsion flowing through the liquid supply pipeline has higher pressure.
A stop valve is arranged on a liquid supply pipeline, the stop valve is one of actuating mechanisms in an automatic control system, and the conventional stop valve cannot be applied to pipelines with pressure of more than or equal to 31.5MPa and flow of more than 1000L/min.
In view of the above-mentioned related art, the inventors considered that there is a drawback that the existing shut-off valve cannot close the line continuously flowing out the liquid having a large pressure when the liquid supply line is broken down, such as burst.
Disclosure of Invention
In order to improve the defect that the existing stop valve can not close the pipe explosion pipeline under the large-traffic and high-pressure states, the application provides a stop valve.
The application provides a trip valve adopts following technical scheme:
a shut-off valve comprises an oil circuit block and a valve core assembly arranged inside the oil circuit block;
a cavity for mounting the valve core assembly is formed in the oil path block, a liquid inlet hole and a liquid outlet hole which are communicated with the cavity and the outside of the oil path block are also formed in the oil path block, and a control cavity communicated with the liquid inlet hole is also formed in the oil path block;
the valve core assembly comprises an outer valve core fixedly arranged in the cavity, an inner valve core arranged in the outer valve core and a compression spring of which two ends are respectively abutted against the inner valve core and the inner wall of the control cavity;
the inner valve core can move along the axial direction of the outer valve core, and one end of the inner valve core close to the liquid inlet hole can seal one end of the outer valve core close to the liquid inlet hole.
By adopting the technical scheme, two liquid supply pipelines are respectively connected to the liquid inlet hole and the liquid outlet hole, when the pipelines normally supply liquid, the control cavity is in a closed state, the inner valve core cannot move in the outer valve core, and the liquid pushes the inner valve core to further compress the compression spring, so that the liquid normally circulates, when the pipelines connected with the liquid outlet hole explode, the control cavity is opened to communicate the control cavity with the liquid inlet hole, after the liquid in the liquid inlet hole flows into the control cavity, the hydraulic pressure at two ends of the inner valve core is the same, at the moment, the spring after two times of compression is expanded, and the compression spring pushes the inner valve core towards the direction of the liquid inlet hole, because the end of the inner valve core, which is deviated from the liquid inlet hole, is applied with extra elastic force of the compression spring, so that the inner valve core can stably close the port of the outer valve core, the pressure in the oil circuit block is kept balanced by the pressure, and then can close the pipeline that has great pressure liquid to flow, and then can reduce the loss and the waste of liquid, trip valve body simple structure, use reliable and stable.
Optionally, the oil path block includes a valve seat and a cover plate detachably mounted on the valve seat, the valve seat is provided with a cavity for mounting the outer valve element, a liquid inlet hole and a liquid outlet hole, and the control cavity is provided on the cover plate.
Through adopting above-mentioned technical scheme, be convenient for install the case subassembly in the oil circuit piece to be convenient for overhaul, change the case subassembly.
Optionally, a first detection port communicated with the liquid inlet hole and a second detection port communicated with the liquid outlet hole are formed in the valve seat.
Through adopting above-mentioned technical scheme, installation sealing plug or pressure measurement joint on detecting the mouth can seal the disk seat, when needs test the pressure of feed liquor hole and outage, one of oil circuit is served and is installed pressure measurement devices such as manometer, pressure sensor, can carry out pressure measurement work to feed liquor hole or outage.
Optionally, a damper is installed in the cover plate, and the damper is located in a passage through which the control cavity is communicated with the liquid inlet hole.
Through adopting above-mentioned technical scheme, when the great liquid of pressure when the feed liquor hole inflow control chamber, the liquid of great pressure is behind the attenuator, can reduce the pressure of liquid, thereby make liquid slowly get into the control intracavity, and then it is comparatively gentle when making the inner valve core seal the outer case, reduce behind the great liquid entering control chamber of pressure behind the impact of inner valve core formation, lead to inner valve core and outer case to take place to strike and lead to the possibility of case subassembly damage, and then promote the operational reliability of trip valve, prolong the life of trip valve.
Optionally, the length of the outer valve core is smaller than that of the cavity;
the cover plate is provided with a clamping ring, the clamping ring is matched with a cavity on the valve seat, a control cavity is formed inside the clamping ring, and after the cover plate is installed on the valve seat, the side face, facing the cavity, of the clamping ring is abutted against the end face of the outer valve element.
Through adopting above-mentioned technical scheme, the joint ring is installed and can be formed good sealedly with the cavity in the cavity to reinforcing control chamber's sealing performance, the joint ring supports tightly on outer case simultaneously, can be with outer case further stable mounting on the disk seat.
Optionally, the outer case includes the installation section of joint in the cavity and with the first seal section of the inside adaptation of cavity, the installation section with the annular has been seted up between the first seal section, set up the inside and outside through-hole of intercommunication outer case on the annular, through-hole and outage intercommunication.
Through adopting above-mentioned technical scheme, in installing the cavity in the disk seat with outer valve element, the annular forms the cavity that supplies the liquid circulation with the cavity inner wall, and liquid finally flows through-hole flow direction outage, is being convenient for liquid smooth ground discharge under the prerequisite with outer valve element steady mounting at the cavity.
Optionally, a clamping part is arranged on the inner wall of one end, close to the liquid inlet hole, of the outer valve element;
the periphery of one end of the inner valve core, which seals the outer valve core, is provided with an inclined surface, and the inclined surface can be abutted against the clamping part.
Through adopting above-mentioned technical scheme, when the closed outer case of inner valve core, the inclined plane butt forms the line seal on joint portion, need not to use under the prerequisite of parts such as sealing washer, can promote the leakproofness between inner valve core and the outer case.
Optionally, the inner valve core includes a cut-off section and a second sealing section with a hollow inner portion, the inclined plane is provided on an end portion of the cut-off section, an outer diameter of the second sealing section is larger than the cut-off section and is consistent with an inner diameter of the outer valve core, and the compression spring is disposed inside the second sealing section.
By adopting the technical scheme, the second sealing section is attached to the inner wall of the outer valve core and then positioned at the cut-off section with smaller outer diameter inside the outer valve core, and the outer peripheral surface of the second sealing section and the inside of the outer valve core form a cavity for liquid to flow through, so that liquid is further facilitated to flow from the liquid inlet hole to the liquid discharge hole.
Optionally, a control valve group communicated with the control cavity is installed on the cover plate, and the control valve group can open and close the control cavity.
Through adopting above-mentioned technical scheme, control the trip valve through the valve unit to replace the staff to operate for the people, after the pipeline bursts, the pipeline is closed to quick, timely control trip valve of control disk seat ability.
Optionally, the control valve group comprises a two-position three-way reversing valve installed in the cover plate and an electromagnetic pilot valve installed on the cover plate, a communication control cavity and an oil path of the two-position three-way reversing valve and the electromagnetic pilot valve are formed in the cover plate, the two-position three-way reversing valve can open and close the control cavity.
Through adopting above-mentioned technical scheme, the signal input part of electromagnetic pilot valve is connected on the pipeline of being connected with the outage, and when the pipe explosion appeared in the pipeline, two tee bend switching-over valves of electromagnetic pilot valve control opened the control chamber, made liquid get into inner valve core, can cut off the pipeline.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the oil path block, the outer valve core, the inner valve core and the compression spring, when the pipe burst occurs in the pipeline, after liquid in the liquid inlet hole flows into the control cavity, the hydraulic pressures at two ends of the inner valve core are the same, at the moment, the spring after twice compression is unfolded, the compression spring pushes the inner valve core towards the direction of the liquid inlet hole, and the extra elastic force of the compression spring is applied to one end of the inner valve core, which is deviated from the liquid inlet hole, so that the port, communicated with the liquid inlet hole, of the outer valve core can be stably closed by the inner valve core, and the pipeline flowing with liquid with larger pressure can be closed;
2. the clamping ring is arranged in the cavity and can form good sealing with the cavity, so that the sealing performance of the control cavity is enhanced, and meanwhile, the clamping ring is tightly abutted against the outer valve core, so that the outer valve core can be further stably arranged on the valve seat;
3. through setting up the valve unit, control the trip valve through the valve unit to replace the staff for the people to operate, after the pipeline bursts, the pipeline is closed to quick, timely control trip valve of control disk seat ability.
Drawings
FIG. 1 is a schematic view of a shut-off valve;
FIG. 2 is an exploded view of a shut off valve;
FIG. 3 is a schematic cross-sectional view of a first view of a shut-off valve;
FIG. 4 is a schematic view of a shut off valve;
FIG. 5 is a schematic cross-sectional view of a second view of a shut-off valve;
fig. 6 is a schematic structural view of the valve core assembly.
Description of reference numerals: 1. a valve seat; 11. a liquid inlet hole; 12. a drain hole; 13. a first detection hole; 14. a second detection hole; 15. a return orifice; 151. a horizontal segment; 152. a first vertical section; 153. a second vertical section; 2. a connecting bolt; 3. a cover plate; 31. a snap ring; 32. a control chamber; 33. a damper; 4. an outer valve core; 41. an installation section; 42. a first seal section; 43. a ring groove; 431. a through hole; 5. an inner valve core; 51. a cut-off section; 52. a second seal section; 6. a compression spring; 7. a two-position three-way reversing valve; 8. an electromagnetic pilot valve.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The application discloses a trip valve, combine fig. 1, fig. 2, the trip valve includes the oil circuit piece, refer to fig. 3, the trip valve is still including setting up the case subassembly in the inside of oil circuit piece, set up two tee bend switching-over valves 7 on the oil circuit piece, and set up the electromagnetic pilot valve 8 on the oil circuit piece, intercommunication case subassembly and two tee bend switching-over valves 7 have been seted up to the inside oil circuit piece of oil circuit piece, and the oil circuit of two tee bend switching-over valves 7 of intercommunication and electromagnetic pilot valve 8, two tee bend switching-over valves 7 can the switching on the oil circuit of intercommunication case subassembly, electromagnetic pilot valve 8's signal input part is connected on the pipeline, electromagnetic pilot valve 8 can control two tee bend switching-over valves 7 and carry out the.
When the pipeline is normally used, the valve core of the electromagnetic pilot valve 8 is positioned at the left position, so that the liquid flowing into the electromagnetic pilot valve 8 from the liquid inlet hole 11 is guided into the two-position three-way reversing valve 7, the electromagnetic pilot valve 8 pushes the valve core of the two-position three-way valve to be positioned at the right position, and the two-position three-way reversing valve 7 is controlled to close the oil way communicated with the valve core assembly, so that the liquid can flow to the pipeline through the stop valve.
Referring to fig. 4, when the pipe explosion appears in the pipeline, the condition of pipe explosion passes to in the electromagnetic pilot valve 8 through electromagnetic pilot valve 8's signal input end, the case of electromagnetic pilot valve 8 moves to right position, there is liquid inlet hole 11 to carry out the shutoff to the liquid of electromagnetic pilot valve 8, thereby make the left position pressure of two three-way switching-over valve 7 reduce, thereby two three-way switching-over valve 7 divides the case to move to left position, so that two three-way switching-over valve 7 will be opened with the oil circuit of case subassembly intercommunication, make large-traffic, highly compressed liquid flows to in the case subassembly, finally make the feed liquor end of trip valve closed, cut off the processing to liquid, the possibility that liquid runs off in a large number when reducing the pipe explosion.
Combine fig. 1, fig. 2, the oil circuit piece includes disk seat 1 and apron 3 through four connecting bolt 2 demountable installation on disk seat 1, disk seat 1 is inside to be seted up both ends intercommunication disk seat 1 inside and outside cavity, one section of cavity sets up to feed liquor hole 11, still opens the outage 12 with the wall body intercommunication on the disk seat 1, outage 12 is located the drill way on disk seat 1 surface, the drill way that is located disk seat 1 surface with feed liquor hole 11 is located two adjacent sides on disk seat 1 respectively.
Referring to fig. 2 and 3, two oil paths respectively communicating with the liquid inlet hole 11 and the liquid outlet hole 12 are formed in the valve seat 1, two ends of each oil path respectively communicate with the outer surface of the valve seat 1 and the liquid inlet hole 11 and the liquid outlet hole 12, and the two oil paths respectively communicating with the liquid inlet hole 11 and the liquid outlet hole 12 are respectively arranged as a first detection port 13 and a second detection port 14, which are located at orifices on the surface of the valve seat.
Install the trip valve on the pipeline after, can install pressure measurement joint on first detection mouth 13 and second detection mouth 14, when needs test the hydraulic pressure inside feed liquor hole 11 and drain hole 12, can connect manometer, pressure sensor etc. on pressure measurement joint, when need not test hydraulic pressure, pressure measurement joint can also form the port to the pipeline and seal to make the trip valve can normally circulate liquid.
Still be equipped with backward flow hole 15 on the disk seat 1, backward flow hole 15 is including seting up the horizontal segment 151 in disk seat 1, the first vertical section 152 of one end intercommunication horizontal segment 151, and set up the vertical section 153 of second on lapping 3, horizontal segment 151 intercommunication disk seat 1 is two sides relatively, the orifice that the one end of horizontal segment 151 was kept away from to first vertical section 152 is located disk seat 1 on the surface, install apron 3 on disk seat 1 after, the one end of the vertical section 153 of second can be located the corresponding setting of the orifice on disk seat 1 surface with first vertical section 152, the other end and the two three-way switching-over valves 7 of second vertical section 153 are linked together.
Referring to fig. 2, integrated into one piece is provided with joint ring 31 on apron 3's the surface, joint ring 31's external diameter is unanimous with the internal diameter of the internal cavity of disk seat 1, joint ring 31's inside forms control chamber 32 with apron 3's surface, control chamber 32 communicates apron 3's outside, install the sealing washer on joint ring 31's the outer peripheral face, install joint ring 31 at the cavity of disk seat 1 internal back, joint ring 31's outer peripheral face and the laminating of cavity inner wall, the sealing washer can promote the leakproofness between joint ring 31 and the cavity.
Combine fig. 5, fig. 6, the case subassembly is including the fixed outer case 4 that sets up in 1 cavity of disk seat, the activity sets up the inside inner case 5 of outer case 4, and one end butt compression spring 6 on inner case 5, the structure that the body of outer case 4 is linked together for inside cavity and both ends, set up outer case 4 behind the cavity, the one end and the feed liquor hole 11 of outer case 4 correspond the setting, install apron 3 back on disk seat 1, can encircle the terminal surface butt that deviates from the apron 3 body on the terminal surface of outer case 4.
The outer valve core 4 comprises an installation section 41 which can be clamped and arranged in the cavity, a first sealing section 42 which is integrally formed with the installation section 41, and an annular groove 43 which is arranged between the installation section 41 and the first sealing section 42, a plurality of through holes 431 are arranged on the annular groove 43, the through holes 431 are communicated with the liquid discharge hole 12, the outer diameter of the installation section 41 is smaller than the outer diameter of the first sealing section 42, the inner diameter of the installation section 41 is consistent with the inner diameter of the first sealing section 42, the inner part of the outer valve core 4, which is positioned at the end hole of the installation section 41, is processed into a flaring shape, a clamping part is integrally formed in the installation section 41, after the inner valve core 5 is installed in the outer valve core 4, one end of the outer valve core 4, which is close to the clamping part, corresponds to the liquid inlet hole 11, the end part of the inner valve core 5 can be clamped and connected on the clamping part, after the outer valve core 4 is installed in the cavity of, sealing rings are respectively arranged on the outer walls of the mounting section 41 and the first sealing section 42 to enhance the sealing property between the outer valve core 4 and the valve seat 1.
With reference to fig. 5 and 6, the length of the inner valve element 5 is smaller than that of the outer valve element 4, the inner valve element 5 is disposed inside the outer valve element 4 and can move along the length direction of the outer valve element 4, the inner valve element 5 includes a cut-off section 51 and a second sealing section 52, the outer diameter of the cut-off section 51 is smaller than that of the second sealing section 52, the end of the cut-off section 51 is a closed end, and after the pipe is exploded, the end of the cut-off section 51 can be closed on the clamping portion of the outer valve element 4, so that liquid is cut off and blocked.
There is the sealing washer at the externally mounted of second seal segment 52 to install inner valve core 5 in the inside back of outer valve core 4, the sealing washer can promote the leakproofness of second seal segment 52 and 4 inner walls of outer valve core, the inside of second seal segment 52 is established to cavity, the shrinkage pool has been seted up to its hollow bottom, after liquid inflow second seal segment 52's inside, liquid inflow shrinkage pool internal energy forms the buffering to liquid, thereby make inner valve core 5 gently closed outer valve core 4 be close to the one end of feed liquor hole 11.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A trip valve, its characterized in that: the oil way valve comprises an oil way block and a valve core assembly arranged inside the oil way block;
a cavity for mounting the valve core assembly is formed in the oil path block, a liquid inlet hole (11) and a liquid outlet hole (12) which are communicated with the cavity and the outside of the oil path block are also formed in the oil path block, and a control cavity (32) communicated with the liquid inlet hole (11) is also formed in the oil path block;
the valve core assembly comprises an outer valve core (4) fixedly arranged in the cavity, an inner valve core (5) arranged in the outer valve core (4), and a compression spring (6) of which two ends are respectively abutted against the inner walls of the inner valve core (5) and the control cavity (32);
the inner portion of the outer valve core (4) is hollow, two ends of the outer valve core (4) are respectively communicated with the liquid inlet hole (11) and the control cavity (32), the outer valve core (4) is communicated with the liquid discharge hole (12), the inner valve core (5) can move along the axis direction of the outer valve core (4), and one end, close to the liquid inlet hole (11), of the inner valve core (5) can seal one end, close to the liquid inlet hole (11), of the outer valve core (4).
2. A shut-off valve according to claim 1, characterised in that: the oil circuit block comprises a valve seat (1) and a cover plate (3) detachably mounted on the valve seat (1), a cavity for mounting the outer valve core (4), a liquid inlet hole (11) and a liquid discharge hole (12) are formed in the valve seat (1), and a control cavity (32) is formed in the cover plate (3).
3. A shut-off valve according to claim 2, characterised in that: a first detection port communicated with the liquid inlet hole (11) and a second detection port communicated with the liquid outlet hole (12) are formed in the valve seat (1).
4. A shut-off valve according to claim 2, characterised in that: install attenuator (33) in apron (3), attenuator (33) are located the passageway of control chamber (32) and feed liquor hole (11) intercommunication.
5. A shut-off valve according to claim 2 or 4, characterised in that: the length of the outer valve core (4) is less than that of the cavity;
be equipped with joint ring (31) on apron (3), cavity looks adaptation on joint ring (31) and the disk seat (1), the inside control chamber (32) that forms of joint ring (31), after apron (3) were installed on disk seat (1), joint ring (31) was on the terminal surface of outer case (4) towards the side butt of cavity.
6. A shut-off valve according to claim 1, characterised in that: outer case (4) including joint erection section (41) in the cavity and with first sealing section (42) of the inside adaptation of cavity, erection section (41) with annular (43) have been seted up between first sealing section (42), set up inside and outside through-hole (431) of intercommunication outer case (4) on annular (43), through-hole (431) communicate with outage (12).
7. A shut-off valve according to claim 6, characterised in that: a clamping part is arranged on the inner wall of one end of the outer valve core (4) close to the liquid inlet hole (11);
the periphery of one end of the inner valve core (5) for sealing the outer valve core (4) is provided with an inclined surface which can abut against the clamping part.
8. A shut-off valve according to claim 1 or 7, characterised in that: the inner valve core (5) comprises a cut-off section (51) and a second sealing section (52) which is hollow inside, the inclined plane is arranged on the end part of the cut-off section (51), the outer diameter of the second sealing section (52) is larger than the cut-off section (51) and is consistent with the inner diameter of the outer valve core (4), and the compression spring (6) is arranged inside the second sealing section (52).
9. A shut-off valve according to claim 1, characterised in that: the cover plate (3) is provided with a control valve group communicated with the control cavity (32), and the control valve group can open and close the control cavity (32).
10. A shut off valve as claimed in claim 9, wherein: the control valve group comprises a two-position three-way reversing valve (7) arranged in the cover plate (3) and an electromagnetic pilot valve (8) arranged on the cover plate (3), wherein a communication control cavity (32) and the two-position three-way reversing valve (7) are arranged in the cover plate (3), and an oil way for communicating the two-position three-way reversing valve (7) and the electromagnetic pilot valve (8) is arranged in the cover plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002316.4A CN112664659A (en) | 2021-01-04 | 2021-01-04 | Cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002316.4A CN112664659A (en) | 2021-01-04 | 2021-01-04 | Cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112664659A true CN112664659A (en) | 2021-04-16 |
Family
ID=75412647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110002316.4A Pending CN112664659A (en) | 2021-01-04 | 2021-01-04 | Cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112664659A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593247A (en) * | 2022-03-23 | 2022-06-07 | 北京华海基业机械设备有限公司 | Low-speed cut-off valve group |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083563A (en) * | 2003-09-11 | 2005-03-31 | Miura Co Ltd | Valve |
| CN2751169Y (en) * | 2004-11-19 | 2006-01-11 | 中国农业大学 | Hydraulic controlled reversing valve |
| CN202118266U (en) * | 2011-06-10 | 2012-01-18 | 山东泰丰液压股份有限公司 | Safety electromagnetic stopping cartridge valve |
| CN104100589A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Fast multi-direction multifunctional liquid control valve |
| CN203948754U (en) * | 2014-07-17 | 2014-11-19 | 圣邦集团有限公司 | A kind of two-way hydraulic cartridge valve open in usual |
| CN105090600A (en) * | 2015-09-11 | 2015-11-25 | 福州大学 | Novel electric-hydraulic proportional overflow valve |
-
2021
- 2021-01-04 CN CN202110002316.4A patent/CN112664659A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083563A (en) * | 2003-09-11 | 2005-03-31 | Miura Co Ltd | Valve |
| CN2751169Y (en) * | 2004-11-19 | 2006-01-11 | 中国农业大学 | Hydraulic controlled reversing valve |
| CN202118266U (en) * | 2011-06-10 | 2012-01-18 | 山东泰丰液压股份有限公司 | Safety electromagnetic stopping cartridge valve |
| CN104100589A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Fast multi-direction multifunctional liquid control valve |
| CN203948754U (en) * | 2014-07-17 | 2014-11-19 | 圣邦集团有限公司 | A kind of two-way hydraulic cartridge valve open in usual |
| CN105090600A (en) * | 2015-09-11 | 2015-11-25 | 福州大学 | Novel electric-hydraulic proportional overflow valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593247A (en) * | 2022-03-23 | 2022-06-07 | 北京华海基业机械设备有限公司 | Low-speed cut-off valve group |
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Application publication date: 20210416 |
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