CN109681651B - Electric control on-off valve - Google Patents
Electric control on-off valve Download PDFInfo
- Publication number
- CN109681651B CN109681651B CN201910123316.2A CN201910123316A CN109681651B CN 109681651 B CN109681651 B CN 109681651B CN 201910123316 A CN201910123316 A CN 201910123316A CN 109681651 B CN109681651 B CN 109681651B
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- Prior art keywords
- sealing
- valve
- valve body
- transmission screw
- guide plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses an electric control on-off valve, which comprises: the main valve body, a longitudinal channel arranged in the main valve body, an on-off mechanism arranged at the lower part of the longitudinal channel, a connecting block fixed at the upper part of the main valve body and a driving device fixed on the connecting block; the on-off mechanism includes: the device comprises a transmission screw, a sealing valve, a guide plug and an insulating spring; the upper end of the transmission screw is in driving connection with the driving device, and the lower end of the transmission screw is in threaded connection with the sealing valve; the lower part of the sealing valve extends into the guide plug and is in clearance fit with the guide plug to move up and down; the upper end of the guide plug extends to the second flow channel, and the lower end of the guide plug is connected to the main valve body in a sealing mode; by adopting the electric control on-off valve, the thrust is large, the energy consumption is small, the installation volume is small, and the electric control on-off valve not only can be suitable for large-diameter pipelines, but also is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of on-off valves, in particular to an electric control on-off valve.
Background
The valve is a pipeline accessory used for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow) of a conveyed medium, and can be divided into a shut-off valve, a check valve and a regulating valve according to the function and the purpose, wherein the shut-off valve is one of the shut-off valves.
The direct-acting on-off valve has the advantages that the valve is in a pilot structure, a pilot hole is easy to be blocked by impurities, the damage frequency is high, the maintenance cost is high, the electromagnetic valve is powered on all the time during working, the structure is complex, the energy consumption is high, the self-service on-off valve is poor in sealing performance, the working pressure is limited, the direct-acting on-off valve is also provided, the direct-acting on-off valve is large in product size and high in power consumption, the production benefit is reduced, and along with the wide application of the on-off valve, the problem that the development of the on-off valve which is suitable for large-diameter, small in size, low in cost, energy-saving and environment-.
Disclosure of Invention
The invention aims to provide an electric control on-off valve, solves the problems of complex structure, high maintenance cost and high energy consumption of the on-off valve in the prior art, and develops the on-off valve which is suitable for large drift diameter, small in size, energy-saving, environment-friendly and low in cost.
In order to achieve the purpose, the invention adopts a technical scheme that: there is provided an electrically controlled on-off valve comprising: the main valve body, a longitudinal channel arranged in the main valve body, an on-off mechanism arranged at the lower part of the longitudinal channel, a connecting block fixed at the upper part of the main valve body and a driving device fixed on the connecting block; a first flow passage and a second flow passage leading to the longitudinal passage are respectively formed in two sides of the main valve body; the connecting block blocks the top of the longitudinal channel; the on-off mechanism includes: the device comprises a transmission screw, a sealing valve, a guide plug and an insulating spring; the upper end of the transmission screw is in driving connection with the driving device, and the lower end of the transmission screw is in threaded connection with the sealing valve; the lower part of the sealing valve extends into the guide plug and is in clearance fit with the guide plug to slide up and down; the upper end of the guide plug extends to the second flow channel, and the lower end of the guide plug is connected to the main valve body in a sealing mode; a conductive groove is formed in the main valve body; the moving stroke of the sealing valve is as follows: the conductive groove is arranged on the upper part, and the conductive groove is arranged on the lower part; the upper end of the insulating spring is connected with the sealing valve, and the lower end of the insulating spring is connected with the guide plug; the connecting block is provided with a conductive pin; the lower part of the guide plug is provided with a first electric connection port; the main valve body is provided with a second electric connection port; the main valve body, the transmission screw, the sealing valve and the guide plug are all electric conductors.
Furthermore, the upper part of the sealing valve is a disc; the edge of the disc is upwards protruded to form a convex ring, and an elastic conductive contact element is arranged on the convex ring; the elastic conductive contact element is fixed on the sealing valve through a spring and is in conductive connection with the sealing valve.
Furthermore, a rubber vulcanization cushion block is arranged in the convex ring.
Further, an insulating sheet is arranged on the side part of the elastic conductive contact element; the insulating sheet is fixedly connected to the upper surface of the convex ring.
Further, the direction end cap includes: a clearance fit portion, a sealing connection portion; the clearance fit part and the sealing connecting part are integrally formed; the clearance fit part is positioned above the sealing connecting part; and the top of the clearance fit part is provided with a conductive contact piece.
Furthermore, a plurality of longitudinally connected cloth ribs are arranged on the inner wall of the clearance fit part.
Furthermore, one end of the conductive pin, which is close to the transmission screw rod, is provided with an electric brush, and the other end of the conductive pin is provided with a control circuit; the conductive pin is electrically connected to the control circuit.
Furthermore, an O-shaped sealing ring a is arranged between the transmission screw rod and the connecting block; an O-shaped sealing ring b is arranged between the transmission screw rod and the sealing valve; the guide plug is connected with the main valve body 1 in a sealing mode through an O-shaped sealing ring c.
Further, the outer wall of the transmission screw is coated with a wear-resistant material.
Further, the driving device includes: the motor is fixed on the connecting block, and the shaft is connected to a motor rotating shaft of the motor; the upper end of the transmission screw rod is connected with the motor rotating shaft through interference fit or bolts.
The invention has the beneficial effects that: by adopting the electric control on-off valve, the driving screw rod arranged in the main valve body is driven by the driving device to drive the sealing valve to move up and down in the guide plug, so that the sealing valve moves up to close the second flow channel, and meanwhile, the sealing valve is contacted with the main valve body and conducts electricity, and a circuit of the first wiring port is switched on; the sealing valve moves downwards to open the second flow channel, and meanwhile, the sealing valve is contacted with the guide plug and conducts electricity, so that a circuit of the second wiring port is conducted; the control circuit is connected with the driving device through the first wiring port and the second wiring port, so that the on-off between the first flow channel and the second flow channel is controlled, the transmission screw is adopted for transmission, the thrust is large, the energy consumption is low, the installation volume is small, and the device is suitable for large-diameter pipelines and is energy-saving and environment-friendly.
Drawings
FIG. 1 is a cross-sectional view showing the internal structure of an electrically controlled on-off valve provided by the present invention;
FIG. 2 is an enlarged view of a portion of the coil A-A of FIG. 1;
FIG. 3 is a top view of a guiding plug structure in the electrically controlled on-off valve provided by the present invention;
reference numerals: 1-a main valve body, 2-a longitudinal channel, 3-an on-off mechanism, 4-a connecting block, 41-a conductive pin, 42-an electric brush, 43-a control circuit, 51-a motor, 52-a motor rotating shaft, 6-a first flow channel, 7-a second flow channel, 31-a transmission screw rod, 311-O type sealing ring a,312-O type sealing ring b,313-O type sealing ring c, 32-a sealing valve, 33-a guide plug, 331-a clearance fit part, 332-a sealing connecting part, 333-a conductive contact element, 334-a rib, 34-an insulating spring, 11-a conductive groove, 35-a first electric connection port, 36-a second electric connection port, 37-a disc, 38-a convex ring, 381-a rubber vulcanization cushion block and 39-an elastic conductive contact element, 391-insulating sheet.
Detailed Description
The following describes in detail an embodiment of the electrically controlled on-off valve provided by the present invention with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "axial", and positional relationships are based on the orientations and positional relationships shown in the drawings, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or part referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present invention provides an electrically controlled on-off valve, comprising: the main valve comprises a main valve body 1, a longitudinal channel 2 arranged in the main valve body 1, an on-off mechanism 3 arranged at the lower part of the longitudinal channel 2, a connecting block 4 fixed at the upper part of the main valve body 1 and a driving device fixed on the connecting block 4; a first flow channel 6 and a second flow channel 7 which are communicated with the longitudinal channel 2 are respectively arranged on two sides of the main valve body 1; the connecting block 2 blocks the top of the longitudinal channel 2; the on-off mechanism 3 includes: a transmission screw 31, a sealing valve 32, a guide plug 33 and an insulating spring 34; the upper end of the transmission screw rod 31 is in driving connection with a driving device, and the lower end of the transmission screw rod is in threaded connection with a sealing valve 32; the lower part of the sealing valve 32 extends into the guide plug 33 and is in clearance fit with the guide plug 33 to slide up and down; the upper end of the guide plug 33 extends to the second flow channel 7, and the lower end is connected to the main valve body 1 in a sealing manner; a conductive groove 11 is formed in the main valve body 1; the travel of the sealing shutter 32 is: up to the conductive groove 11 and down to the top of the guiding plug 33; the upper end of the insulating spring 34 is connected with the sealing valve 32, and the lower end is connected with the guide plug 33; the connecting block 4 is provided with a conductive pin 41; the lower part of the guide plug 33 is provided with a first electric connection port 35; a second electric connection port 36 is arranged on the main valve body 1; the main valve body 1, the transmission screw 31, the sealing valve 32 and the guiding plug 33 are all electric conductors.
In the electric control on-off valve, the main valve body is a conductor, the center of the main valve body is provided with the longitudinal channel 2, and the two sides of the main valve body are provided with the first flow channel and the second flow channel so as to cut off or connect the flow between the second flow channel and the longitudinal channel and cut off the first flow channel and the second flow channel, and the longitudinal channel plays a role in accommodating the on-off mechanism and communicating the first flow channel and the second flow channel; it should be noted here that the connecting block 2 blocks the top of the longitudinal channel 2, the connecting block can block the top of the longitudinal channel by welding, and also can block the top of the longitudinal channel by the sealing connection of the bolt connection and the sealing ring, thereby avoiding the occurrence of leakage at the upper part of the valve body and ensuring the normal operation of the on-off valve.
In the electric control on-off valve, the driving device can preferably adopt a driving mechanism consisting of a motor 51 fixed on the connecting block 4 and a motor rotating shaft 52 connected with the motor 51 in a shaft mode, the motor is electrified to realize the left rotation or the right rotation of the motor, and a control circuit formed by a PLC control circuit board can be electrically connected with the motor to realize the operation of the motor; the upper end of the driving screw 31 is in driving connection with a driving device, here the driving connection can be that the upper end of the driving screw 31 is in interference fit or bolted connection with the motor rotating shaft 52, and when the motor driving motor rotating shaft rotates, the driving screw 31 can be driven to rotate through the motor rotating shaft so as to realize the rotation of the driving screw.
In the electric control on-off valve provided by the invention, the lower end of the transmission screw 31 is in threaded connection with the sealing valve 32, the sealing valve is a sealing movable component which can move up and down and the upper end of the sealing movable component can be in sealing contact with the main valve body, as shown in fig. 2, a disc 37 can be preferably adopted, the edge of the disc 37 protrudes upwards to form a convex ring sealing valve, the lower surface of the disc at the upper part can be in contact with and supported on the top of the guide plug, so that the electric conduction is realized, and the stroke of the electric control on-off valve is limited to be from the upper part to the electric conduction.
And, by providing the elastic conductive contact piece 39 on the convex ring 38; the elastic conductive contact element 39 is fixed on the sealing valve through a spring and is in conductive connection with the sealing valve 32, so that the purpose that the sealing valve moves upwards to be in conductive contact with the main valve body 1 to conduct a circuit is achieved, the sealing valve is in threaded connection with the transmission screw, mechanical rotating force can be directly transmitted to the sealing valve element, thrust to the sealing valve is increased, on-off can still be achieved under the condition that the first flow channel and the second flow channel are large in diameter, only a motor is adopted to drive a screw rod to rotate, energy consumption is low, and the energy-saving and environment-friendly advantages are achieved.
The main valve body is provided with a conductive groove 11, the conductive groove can be processed by milling process when the main valve body is processed to form a conductive groove as shown in fig. 1, the side wall of the conductive groove and a rubber vulcanization cushion block 381 arranged in the convex ring 38 can form a sealing structure by the arrangement of the conductive groove, and meanwhile, the conductive performance of the elastic conductive contact element on the convex ring cannot be influenced. The connecting block 4 is provided with a conductive pin 41, the exterior of the conductive pin 41 can be connected to a control circuit through an electric wire, here, one end of the conductive pin 41 close to the transmission screw 31 can be provided with an electric brush 42, so that the rotation of the transmission screw is not influenced, the circuit can be conducted with the transmission screw, the conductive function is realized, and the contact surface of the conductive pin and the connecting block is insulated.
In the electrically controlled on-off valve provided by the present invention, as shown in fig. 2, an insulating sheet 391 is disposed on a side portion of the elastic conductive contact element 39; the insulation sheet 391 is fixedly connected to the upper surface of the convex ring 38, and the elastic conductive contact piece is connected to the inside of the convex ring 38 through a conductive spring, and the surface of the convex ring 38 is insulated, so that the sealing valve has safety and stability when conducting electricity.
In the electrically controlled on-off valve provided by the present invention, the guide plug 33 includes: the clearance fit portion 331, the seal connecting portion 332; the clearance fit portion 331 is integrally formed with the sealing connection portion 332; the clearance fit portion 331 is located above the sealing connection portion 332; the top of the clearance fit part is provided with a conductive contact part 333, as shown in fig. 3, the inner wall of the clearance fit part 333 is provided with a plurality of longitudinally connected cloth ribs 334, by setting the guide plug to the structure, the sealing connection part can be better connected with the main valve body in a sealing way, the clearance fit part can be matched with the lower part of the sealing valve to enable the sealing valve to move up and down, and by setting the cloth ribs, when the sealing valve is driven by the transmission screw rod to move down due to threaded connection, the transverse friction force between the lower part of the sealing valve and the clearance fit part is increased, and the cloth ribs can be clamped in the concave grooves by arranging the concave grooves matched with the cloth ribs on the lower part of the sealing valve, so that the rotation of the sealing valve is limited, the sealing valve can only move up and down under the action of threads, and the guide effect of the guide plug when the.
In the electric control on-off valve, an O-shaped sealing ring a311 is arranged between the transmission screw 31 and the connecting block 4; an O-shaped sealing ring b312 is arranged between the transmission screw 31 and the sealing valve 32; the guide plug 33 is hermetically connected with the main valve body 1 through an O-ring c313, and the outer wall of the drive screw 31 is coated with a wear-resistant material, and the arrangement of a plurality of O-rings improves the sealing performance of the electrically controlled on-off valve, and the drive screw is coated with the wear-resistant material to increase the durability of the components, better prevent the components from being damaged, and prolong the service life, where it is to be noted that the wear-resistant material may be KN17 high-molecular ceramic polymer, but is not limited to being used as the only wear-resistant material.
The working principle is as follows: when the first flow passage and the second flow passage in the figure 1 need to be communicated: the motor is electrified and rotates rightwards, the rotating shaft of the motor drives the transmission screw to rotate, the transmission screw drives the sealing valve to move downwards and compress the insulating spring, the elastic conductive contact element on the sealing valve is separated from the main valve body and the conductive groove, and the second flow passage is communicated with the longitudinal passage, so that the first flow passage and the second flow passage are communicated; when the sealing valve moves downwards to be in contact with the conductive contact part 333 on the guide plug, a circuit loop from the transmission screw → the sealing valve → the guide plug to the second electric wiring port is connected to the control circuit through the conductive pin, and the control circuit controls the motor to be powered off, so that the power is not supplied any more after the valve is opened; when the first flow passage and the second flow passage need to be cut off: the control circuit controls the motor to rotate leftwards, the motor rotating shaft drives the transmission screw to rotate, the sealing valve is driven to move upwards under the spring force action of the insulating spring, when the sealing valve moves to the elastic conductive contact part to be contacted with the conductive groove on the main valve body, the transmission screw → the sealing valve → the main valve body to the circuit loop of the first electric connection port is connected to the control circuit through a wire at the first connection port, and the control circuit controls the motor to be powered off, so that the first flow channel and the second flow channel are finally cut off.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An electrically controlled on-off valve, comprising: the main valve body, a longitudinal channel arranged in the main valve body, an on-off mechanism arranged at the lower part of the longitudinal channel, a connecting block fixed at the upper part of the main valve body and a driving device fixed on the connecting block; a first flow passage and a second flow passage leading to the longitudinal passage are respectively formed in two sides of the main valve body; the connecting block blocks the top of the longitudinal channel; the on-off mechanism includes: the device comprises a transmission screw, a sealing valve, a guide plug and an insulating spring; the upper end of the transmission screw is in driving connection with the driving device, and the lower end of the transmission screw is in threaded connection with the sealing valve; the lower part of the sealing valve extends into the guide plug and is in clearance fit with the guide plug to move up and down; the upper end of the guide plug extends to the second flow channel, and the lower end of the guide plug is connected to the main valve body in a sealing mode; a conductive groove is formed in the main valve body; the stroke of the up-and-down movement of the sealing valve is as follows: the conductive groove is arranged on the upper part, and the conductive groove is arranged on the lower part; the upper end of the insulating spring is connected with the sealing valve, and the lower end of the insulating spring is connected with the guide plug; the connecting block is provided with a conductive pin; the lower part of the guide plug is provided with a first electric connection port; the main valve body is provided with a second electric connection port; the main valve body, the transmission screw, the sealing valve and the guide plug are all electric conductors.
2. An electrically controlled on-off valve according to claim 1, characterized in that: the upper part of the sealing valve is a disc; the edge of the disc is upwards protruded to form a convex ring, and an elastic conductive contact element is arranged on the upper convex ring; the elastic conductive contact element is fixed on the sealing valve through a spring and is in conductive connection with the sealing valve.
3. An electrically controlled on-off valve according to claim 2, characterized in that: and a rubber vulcanization cushion block is arranged in the convex ring.
4. An electrically controlled on-off valve according to claim 2, characterized in that: the side part of the elastic conductive contact element is provided with an insulating sheet; the insulating sheet is fixedly connected to the upper surface of the convex ring.
5. An electrically controlled on-off valve according to claim 1, characterized in that: the direction end cap includes: a clearance fit portion, a sealing connection portion; the clearance fit part and the sealing connecting part are integrally formed; the clearance fit part is positioned above the sealing connecting part; and the top of the clearance fit part is provided with a conductive contact piece.
6. An electrically controlled on-off valve according to claim 5, characterized in that: and a plurality of longitudinally connected cloth ribs are arranged on the inner wall of the clearance fit part.
7. An electrically controlled on-off valve according to claim 1, characterized in that: one end of the conductive pin, which is close to the transmission screw rod, is provided with an electric brush, and the other end of the conductive pin is provided with a control circuit; the conductive pin is electrically connected to the control circuit.
8. An electrically controlled on-off valve according to claim 1, characterized in that: an O-shaped sealing ring a is arranged between the transmission screw rod and the connecting block; an O-shaped sealing ring b is arranged between the transmission screw rod and the sealing valve; the guide plug is connected with the main valve body 1 in a sealing mode through an O-shaped sealing ring c.
9. An electrically controlled on-off valve according to claim 8, characterized in that: and the outer wall of the transmission screw is coated with a wear-resistant material.
10. An electrically controlled on-off valve according to claim 1, characterized in that: the driving device includes: the motor is fixed on the connecting block, and the shaft is connected to a motor rotating shaft of the motor; the upper end of the transmission screw rod is connected with the motor rotating shaft through interference fit or bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123316.2A CN109681651B (en) | 2019-02-18 | 2019-02-18 | Electric control on-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123316.2A CN109681651B (en) | 2019-02-18 | 2019-02-18 | Electric control on-off valve |
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| Publication Number | Publication Date |
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| CN109681651A CN109681651A (en) | 2019-04-26 |
| CN109681651B true CN109681651B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910123316.2A Active CN109681651B (en) | 2019-02-18 | 2019-02-18 | Electric control on-off valve |
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| CN (1) | CN109681651B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110779201B (en) * | 2019-10-17 | 2024-08-23 | 广东金美达实业有限公司 | Gas water heater with water storage tank capable of rapidly flowing out hot water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2851773Y (en) * | 2005-09-28 | 2006-12-27 | 刘岗 | Quick shut-off device for electric valve |
| CN105114659A (en) * | 2015-09-10 | 2015-12-02 | 哈尔滨市农业科学院 | Control valve for achieving quick pressure relief and same branch pressure in pesticide liquid spraying |
| CN108150665A (en) * | 2018-02-08 | 2018-06-12 | 陇东学院 | A kind of intelligent and safe cutting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9303785B2 (en) * | 2013-08-02 | 2016-04-05 | Jdv Control Valves Co., Ltd | Method for controlling valve apparatus |
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2019
- 2019-02-18 CN CN201910123316.2A patent/CN109681651B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2851773Y (en) * | 2005-09-28 | 2006-12-27 | 刘岗 | Quick shut-off device for electric valve |
| CN105114659A (en) * | 2015-09-10 | 2015-12-02 | 哈尔滨市农业科学院 | Control valve for achieving quick pressure relief and same branch pressure in pesticide liquid spraying |
| CN108150665A (en) * | 2018-02-08 | 2018-06-12 | 陇东学院 | A kind of intelligent and safe cutting device |
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| CN109681651A (en) | 2019-04-26 |
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