CA3158531A1 - Quick-connect joint liquid supply valve, and use method and quick coupling method thereof - Google Patents

Quick-connect joint liquid supply valve, and use method and quick coupling method thereof Download PDF

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Publication number
CA3158531A1
CA3158531A1 CA3158531A CA3158531A CA3158531A1 CA 3158531 A1 CA3158531 A1 CA 3158531A1 CA 3158531 A CA3158531 A CA 3158531A CA 3158531 A CA3158531 A CA 3158531A CA 3158531 A1 CA3158531 A1 CA 3158531A1
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CA
Canada
Prior art keywords
hole
ball
tightening
valve body
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CA3158531A
Other languages
French (fr)
Inventor
Beibei Li
Xiumei Liu
Jichao MA
Jie He
Wei Li
Zhong Fan
Shaobin XIANG
Yongwei XIE
Yujia ZHANG
Shenzhen SUN
Linghang Wei
Weiwei Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
Xuzhou University of Technology
Original Assignee
China University of Mining and Technology CUMT
Xuzhou University of Technology
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Publication date
Application filed by China University of Mining and Technology CUMT, Xuzhou University of Technology filed Critical China University of Mining and Technology CUMT
Publication of CA3158531A1 publication Critical patent/CA3158531A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • 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
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
    • F16K31/52441—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve with a pivoted disc or flap

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Valve Housings (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

The present invention discloses a quick-connect joint liquid supply valve, and a use method and a quick coupling method thereof, which are suitable for use in a joint liquid supply system. The quick-connect joint liquid supply valve includes a right valve body, a left valve body, a pre-tightening mechanism, a spring ball linkage mechanism, and a quick coupling plug. The left valve body and the right valve body are combined in a left-right manner. The pre-tightening mechanism is arranged in the right valve body, two ends of the spring ball linkage mechanism are arranged in the left valve body and the right valve body respectively, and the quick coupling plug is arranged on the left valve body. The quick-connect joint liquid supply valve is of a simple structure, low costs, high control precision, and fast response speed, can use its own structure to realize the independent adjustment of the pressure between flow channels, the instantaneous opening or closing of liquid supply pipelines, and the joint liquid supply of multiple liquid supply pipelines, and can be quickly coupled, which allows for the flexible and quick coupling of any number of liquid supply pipelines for joint liquid supply, and can realize the joint liquid supply of multiple hydraulic pumping stations in hydraulic systems requiring high pressure and high flow rate.

Description

QUICK-CONNECT JOINT LIQUID SUPPLY VALVE, AND USE METHOD
AND QUICK COUPLING METHOD THEREOF
Technical Field The present invention relates to a quick-connect joint liquid supply valve, a use method and a quick coupling method thereof, and particularly to a quick-connect joint liquid supply valve suitable for use in a joint liquid supply system, and a use method and a quick coupling method thereof.
Background With the continuous development of modernization and the continuous expansion of the scale of construction, hydraulic technologies are more widely applied in various fields and are playing a more important role. With the increasing demand for high power, high pressure, and high flow rate, joint liquid supply systems are continuously developing toward high pressure and high flow rate, which requires the use of multiple pumping stations to work together for liquid supply. At present, joint liquid supply systems generally adopt multiple pumping stations arranged independently of each other, leading to the problems that the modes of liquid supply are limited and that the system has a complex structure and cannot achieve joint liquid supply in a limited space; and do not allow for flexibly increasing or reducing the number of pumping stations for liquid supply depending on different working conditions.
In existing joint liquid supply technologies, a joint liquid supply system is implemented by using multiple pumping stations in parallel and equipping each pumping station with hydraulic components such as electromagnetic unloading valves and on-off valves to realize joint liquid supply of joint pipelines. However, because a set of hydraulic components is installed for each pumping station to satisfy the working parameters of the pumping station and the liquid supply of each pumping station also needs to be controlled separately, high design and manufacturing costs are Date Recue/Date Received 2022-05-06 incurred. On the other hand, when a large number of pumping stations are required for liquid supply, the joint liquid supply system has a complex structure and requires a large number of hydraulic components, the operation is cumbersome, and the working capacity of j oint liquid supply cannot be achieved in a limited space. Moreover, when the working requirements are changed, the design of the liquid supply system cannot be changed by flexibly increasing or reducing the number of liquid supply pipelines, and complex disassembly and assembly operations are required in order to meet the new working requirements.
Summary In order to overcome the drawbacks in the above-mentioned technologies, an objective of the present invention is to provide a quick-connect joint liquid supply valve which is of a simple structure, low costs, high control precision, and fast response speed, can use its own structure to realize the independent adjustment of the pressure between flow channels, the instantaneous opening or closing of liquid supply pipelines, and the joint liquid supply of multiple liquid supply pipelines, and can be quickly coupled, and a use method and a quick coupling method thereof In order to overcome the drawbacks in the prior art, the present invention provides a quick-connect joint liquid supply valve, including a right valve body, a left valve body, a pre-tightening mechanism, a spring ball linkage mechanism, and a quick coupling plug, wherein the left valve body and the right valve body are combined in a left-right manner, the pre-tightening mechanism is arranged in the right valve body, two ends of the spring ball linkage mechanism are arranged in the left valve body and the right valve body respectively, and the quick coupling plug is arranged on the left valve body;
a lower part of the right valve body is provided with a right oil outlet chamber, an upper part of the right valve body is vertically provided with a pressure control valve chamber in communication with the right oil outlet chamber, an oil inlet communicating hole and a rectangular connecting rod working hole are transversely provided on a left side of the pressure control valve chamber, the oil
2 Date Recue/Date Received 2022-05-06 inlet communicating hole is located above the rectangular connecting rod working hole, the oil inlet communicating hole and the rectangular connecting rod working hole are both in communication with the pressure control valve chamber, a ball rod mounting hole is provided in the rectangular connecting rod working hole, a base mounting groove is provided on a left surface of the right valve body, a right valve body assembly positioning hole is provided with on a left side of the right oil outlet chamber of the right valve body, a male plug protruding rightward and having three stepped surfaces is provided on a right side of the right oil outlet chamber of the right valve body, diameters of the three stepped surfaces of the male plug having the three stepped surfaces gradually decrease from left to right, a middle step area of the male plug is provided with a ball positioning groove, a right stepped surface area of the male plug is provided with external threads configured for threaded connection with an external oil pipe, the male plug is provided with an oil outlet hole in communication with the right oil outlet chamber, a male plug top of the male plug is provided with a male plug top oil through hole, four transverse right valve body connection through holes are respectively provided at four corners of the upper part of the right valve body, and two right valve body positioning through holes are respectively provided at two corners of the lower part of the right valve body;
an upper part of the left valve body is provided with an oil inlet chamber, a lower part of the left valve body is provided with a left oil outlet chamber, an oil inlet control hole configured to communicate the oil inlet chamber with the left oil outlet chamber is provided between the oil inlet chamber and the left oil outlet chamber, a top of the left valve body is provided with an oil inlet hole in communication with the oil inlet chamber, the oil inlet hole is provided with internal threads, and the oil inlet chamber is in communication with an external oil source through the oil inlet hole; a female plug connection hole is provided on a left side of the left oil outlet chamber, and the female plug connection hole is provided with internal threads; a through hole is provided on a right side of the left oil outlet chamber, a left valve body assembly positioning boss is arranged on an outer side of the through hole, and a gravity cover mounting hole is arranged in the left oil outlet chamber; the
3 Date Recue/Date Received 2022-05-06 left valve body assembly positioning boss is engaged with the right valve body assembly positioning hole to axially position the left valve body and the right valve body; four transverse left valve body connection through holes are respectively provided at four corners of the oil inlet chamber in the upper part of the left valve body, screws are respectively fastened to nuts through the left valve body connection through holes and the right valve body connection through holes to fix the left valve body and the right valve body together; two left valve body positioning through holes are respectively provided at two corners above the female plug connection hole in the lower part of the left valve body, for use in combination with the two right valve body positioning through holes on the right valve body;
the pre-tightening mechanism is arranged in the pressure control valve chamber from top to bottom, and includes a pre-tightening rod, a pre-tightening choke plug, a pre-tightening cylinder, and a pre-tightening spring, and a pre-tightening cylinder cap; the pre-tightening choke plug is provided with a threaded through hole, an outer side of the pre-tightening choke plug is threadedly connected to an upper part of the pressure control valve chamber, an upper part of the pre-tightening rod is connected to the threaded through hole of the pre-tightening choke plug by external threads, a lower part of the pre-tightening rod is provided with a pre-tightening spring mounting disc, the pretension rod is configured to rotate and move by the external threads, the lower part of the pre-tightening rod is arranged in the pressure control valve chamber by arranging the pre-tightening choke plug on the upper part of the pressure control valve chamber, an upper part of the pre-tightening cylinder is provided with a pre-tightening rod through hole, an annular groove is provided on an outer surface of a middle part of the pre-tightening cylinder, an internal threaded section is provided at a bottom of the pre-tightening cylinder, the pre-tightening cylinder is connected to the pre-tightening spring mounting disc in the lower part of the pre-tightening rod through the pre-tightening rod through hole, a pre-tightening spring is sleeved between above the pre-tightening spring mounting disc and the pre-tightening cylinder, the external threads of the upper part of the pre-tightening rod extend out of the pre-tightening rod through hole, an inner upper surface of the pre-tightening cylinder is pressed
4 Date Recue/Date Received 2022-05-06 against an upper end of the pre-tightening spring, the pre-tightening cylinder cap is a cylindrical boss structure, and a top of the pre-tightening cylinder cap is provided with a thread structure configured for connection with internal threads at the bottom of the pre-tightening cylinder;
the spring ball linkage mechanism includes a gravity cover mounting screw, a gravity cover, a gravity cover connecting rod, a mounting base, an eccentric cam, a ball rod, a pin, a ball, a ball rod head, a ball rod sleeve, and a ball rod spring; the ball rod includes an upper segment, a middle segment, and a lower segment, the upper segment of the ball rod is provided with a cylindrical groove, the middle segment and the lower segment of the ball rod are each of a rectangular column structure, a ball rod mounting through hole is provided on the middle segment of the ball rod, the ball rod mounting through hole is connected to the ball rod mounting hole of the right valve body by the pin, and a ball rod connecting boss is provided at an end of the lower segment of the ball rod; the upper segment and the middle segment of the ball rod are axially bent relative to the lower segment of the ball rod; an upper end of the ball rod sleeve is provided with a ball rod head through hole; a front end of the ball rod head is provided with a ball accommodating groove, the ball is mounted in the .. ball accommodating groove, and a shoulder is arranged on each of two sides of a rear part of the ball rod head; an upper end of the ball rod sleeve is provided with a ball rod head through hole, the ball rod head extends out of the ball rod head through hole on the ball rod sleeve and is in interference fit with the upper segment of the ball rod through a lower end of the ball rod sleeve, the ball rod spring is arranged between the cylindrical groove and a tail of the ball rod head, and upper and lower ends of the ball rod spring are respectively pressed against a lower surface of the ball rod head and the cylindrical groove; the eccentric cam is connected to a mounting base connecting shaft through an eccentric cam mounting through hole and finally mounted on the mounting base, the mounting base is fixed in the oil inlet chamber by engagement of a mounting base boss on one side of the mounting base in the base mounting groove, the eccentric cam is provided with the eccentric cam mounting through hole, the eccentric cam mounting through hole is connected to an eccentric cam synchronization connecting rod through a connecting shaft, one end of the eccentric cam
5 Date Recue/Date Received 2022-05-06 synchronization connecting rod is connected to the eccentric cam mounting through hole of the eccentric cam, the other end of the eccentric cam synchronization connecting rod is provided with a guide slot along a center line thereof, and the guide slot is fitted to the ball rod connecting boss on the ball rod; the gravity cover connecting rod is a frame structure arranged around a circumference of the eccentric cam, a T-shaped connecting rod is connected below the gravity cover connecting rod by a gravity cover connecting rod guide rod, the gravity cover connecting rod guide rod is a crankshaft structure, an earring protrusion is arranged on a lower surface of the gravity cover, the earring protrusion is provided with a gravity cover connecting hole, the gravity cover connecting hole of the gravity cover is movably connected to the gravity cover mounting hole in the left valve body by the gravity cover mounting screw, gravity cover rectangular slots are arranged on an upper surface of the gravity cover, and the gravity cover rectangular slots are movably connected to the T-shaped connecting rod;
the quick coupling plug includes a female plug, a switch, a switch spring, a plug ball, an 0-ring, a blocking piece, a choke plug spring, and a middle choke plug, and a metal retaining ring; and the female plug is provided with an inner hole and an outer hole, six truncated cone-shaped through holes with a large outer-side diameter and a smaller inner-side diameter are provided in a circumferential array on a wall of the outer hole, a bottom of the inner hole is provided with internal threads for engagement with the female plug connection hole, a blocking piece is arranged between the female plug connection hole and the inner hole, a plurality of oil through holes are provided in a center of the blocking piece, the blocking piece is fixed by threads, a switch shoulder is arranged at a position in an axial through hole of the switch close to an upper end of the switch, a side surface of the switch shoulder is pressed against the plug ball, the middle choke plug is of a cone-shaped structure and is arranged between the inner hole and the outer hole, the choke plug spring is arranged in the inner hole between the middle choke plug and the blocking piece, a tip of the middle choke plug is placed facing toward the outer hole, a bottom of the middle choke plug is pressed against an upper end of the choke plug spring and is in close contact with an upper surface of the inner hole,
6 Date Recue/Date Received 2022-05-06 the blocking piece is screwed into the inner threads on the bottom of the inner hole to press against a lower end of the choke plug spring, the 0-ring is mounted in a groove in the outer hole, the plug ball is configured to be fitted in the truncated cone-shaped through hole, the switch is sleeved on an outer wall of the outer hole and is pressed against the plug ball, the metal retaining ring is mounted in a groove on an outer surface of the outer hole, an upper surface of the switch shoulder is pressed against the metal retaining ring, the switch spring is mounted between the switch and the outer wall of the outer hole, and upper and lower ends of the switch spring are respectively pressed against a lower surface of the switch shoulder and a shoulder of the female plug.
The right valve body and the left valve body combined together are fixed to a workbench.
The left valve body and the right valve body are axially positioned by engagement of the left valve body assembly positioning boss with the right valve body assembly positioning hole.
The mounting base is provided with a vertical guide slot, a lower end of the gravity cover connecting rod is mounted in the vertical guide slot, a right surface of the mounting base is in close contact with the left surface of the right valve body, a lower right end of the mounting base is provided with a mounting base boss, the base mounting groove is provided on the left surface of the right valve body, and the mounting base boss is inserted into the base mounting groove.
The inner-side diameter of the truncated cone-shaped through hole on the female plug is smaller than a diameter of the plug ball, and the inner-side diameter of the truncated cone-shaped through hole on the female plug is larger than half the diameter of the plug ball; and the outer-side diameter of the truncated cone-shaped through hole on the female plug is larger than the diameter of the plug ball.
An inner diameter of the pre-tightening spring is slightly larger than a diameter of the pre-tightening rod, an outer diameter of the pre-tightening spring is slightly smaller than a diameter of the pre-tightening spring mounting disc (74), and the diameter of the pre-tightening spring mounting disc is slightly smaller than an internal aperture of the pre-tightening cylinder; a diameter of the pre-tightening rod through hole is slightly larger than the diameter of the pre-tightening rod, the diameter
7 Date Recue/Date Received 2022-05-06 of the pre-tightening rod through hole is smaller than a diameter of a lower step area of the pre-tightening choke plug, and the diameter of the pre-tightening rod through hole is smaller than the outer diameter of the pre-tightening spring; a maximum outer diameter of the pre-tightening cylinder is equal to a maximum diameter of the pre-tightening cylinder cap, and the maximum outer diameter of the pre-tightening cylinder is equal to a diameter of the pressure control valve chamber, so as to divide the pressure control valve chamber into upper and lower areas not in communication with each other; and after the pre-tightening choke plug is mounted in the pressure control valve chamber, a position of a bottom of the pre-tightening cylinder cap is lower than a lowermost position in the rectangular connecting rod working hole and a top of the pre-tightening cylinder cap is lower than a highest position of the oil inlet communicating hole when a bottom of the pre-tightening choke plug is in contact with the pre-tightening cylinder.
An upward/downward movement of the pre-tightening cylinder drives the ball rod to rotate clockwise/counterclockwise; when the ball rod rotates clockwise to a lowermost position in the rectangular connecting rod working hole, the eccentric cam rotates clockwise to a maximum angle position; when the ball rod rotates counterclockwise to an uppermost position in the rectangular connecting rod working hole, the eccentric cam rotates counterclockwise to the maximum angle position; and when the eccentric cam rotates to the maximum angle position, the gravity cover connecting rod is moved upward/downward, to push the gravity cover to open/close by rotating about the pin.
An aperture of the ball accommodating groove is smaller than a diameter of the ball rod; a diameter of the ball rod head through hole is slightly larger than a diameter of the ball rod head, the diameter of the ball rod head through hole is smaller than a diameter of the shoulder of the ball rod head, a sum of a length of the ball rod head and a height of the ball rod spring when fully compressed is greater than a depth of the cylindrical groove on the upper segment of the ball rod, the ball rod head extends into the annular groove on the outer surface of the pre-tightening cylinder, the ball rod spring axially urges against a bottom of the ball rod head, and the ball in the ball accommodating
8 Date Recue/Date Received 2022-05-06 groove on the front end of the ball rod head is tangent to an inner surface of the annular groove and is in close contact with the inner surface of the annular groove; an outer diameter of the ball rod spring is slightly smaller than the diameter of the shoulder of the ball rod head; a diameter of the ball rod connecting boss is equal to a width of the guide slot; a diameter of the gravity cover connecting rod guide rod is equal to a width of the vertical guide slot; and when the ball rod head is located at an uppermost position in the rectangular connecting rod working hole, the gravity cover connecting rod pulls the gravity cover so that the gravity cover is in close contact with an upper surface of the left oil outlet chamber, to realize closing of the oil inlet control hole at an upper limit position.
A working method for the quick-connect joint liquid supply valve described above is provided, including the following steps:
hydraulic oil entering the oil inlet chamber of the left valve body through the oil inlet hole, and entering an upper part of the oil inlet chamber through the oil inlet communicating hole of the right valve body; after pressure of the hydraulic oil rises to be greater than a sum of hydraulic oil pressure in a lower part of the oil inlet chamber and a pre-tightening force of the pre-tightening spring, the .. pre-tightening cylinder moving downward to drive the ball rod head to move downward, and the ball rod head driving the ball rod to rotate clockwise, to gradually compress the ball rod spring; when the ball rod rotates clockwise to a horizontal position, the ball rod spring reaching a maximum compression amount and tending to return to an original length, the ball rod continuing to rotate clockwise, the ball rod spring instantly springing back and pushing the ball rod head to move downward along an inner surface of the annular groove, and the ball rod quickly rotating clockwise to a lowermost position to drive the eccentric cam to rotate clockwise and push the gravity cover connecting rod to move downward, so that the gravity cover is pushed downward and opened to realize instant communication between the oil inlet chamber and the left oil outlet chamber of the left valve body; when the pressure of the hydraulic oil drops to below the sum of the hydraulic oil pressure in the lower part of the oil inlet chamber and the pre-tightening force of the pre-tightening spring, the pre-tightening cylinder moving upward to drive the ball rod head to move upward, and
9 Date Recue/Date Received 2022-05-06 the ball rod head driving the ball rod to rotate counterclockwise, to gradually compress the ball rod spring; when the ball rod rotates counterclockwise to a horizontal position, the ball rod spring reaching a maximum compression amount and tending to return to an original length, the ball rod continuing to rotate counterclockwise, the ball rod spring springing back and pushing the ball rod head to move upward along the inner surface of the annular groove, and the ball rod quickly rotating counterclockwise to an uppermost position to drive the eccentric cam to rotate counterclockwise and push the gravity cover connecting rod to move upward, so that the gravity cover is pulled upward and closed to instantly cut off the communication between the oil inlet chamber and the left oil outlet chamber of the left valve body.
A quick coupling method for the quick-connect joint liquid supply valve described above is provided, including the following steps:
turning the switch of the female plug of a first quick-connect joint liquid supply valve rightward to cause the plug ball to exit outward, inserting the male plug of a second quick-connect joint liquid supply valve into the outer hole of the female plug of the first quick-connect joint liquid supply valve, and as the male plug continues to be pushed toward inside of the female plug, the plug ball being engaged into the ball positioning groove on the male plug; at the same time, the top of the male plug pushing the middle choke plug inside the female plug to leave the upper surface of the inner hole of the female plug, so that flow channels in the male plug and the female plug become in communication with each other, thus completing coupling of the two quick-connect joint liquid supply valves; at this moment, releasing the switch, the switch spring springing back to cause the switch to return to the initial position, and the switch shoulder being pressed against the plug ball, so that the plug ball cannot automatically exit from the ball positioning groove, thus completing coupling and fixing of the two quick-connect joint liquid supply valves; after the coupling is completed, turning the switch of the female plug of the first quick-connect joint liquid supply valve rightward to cause the switch shoulder to leave the plug ball, the plug ball exiting from the ball positioning groove, the compressed choke plug spring pushing the middle choke plug to approach the upper surface of the inner hole of Date Recue/Date Received 2022-05-06 the female plug, and the middle choke plug being pressed against the top of the male plug to push the male plug to exit from the outer hole of the female plug, to complete separation of the two quick-connect joint liquid supply valves.
Beneficial effects:
The present invention provides a quick-connect joint liquid supply valve, which is composed of easy-to-process mechanical structures, connecting rods, and standard parts, and therefore has a simple structure and requires low costs. The pressure adjustment structure is based on the classic formulas of hydraulic pressure and spring tension, and therefore has a clear working mechanism, high control accuracy, and fast response speed. The gravity cover is automatically opened or closed according to the pressure variation, to allow or not allow joint liquid supply, thereby realizing the automatic adjustment of the pressure in the valve.
When the pressure in the oil inlet chamber is greater than the sum of the pre-tightening force of the pre-tightening spring in the pre-tightening mechanism and the pressure in the right oil outlet chamber below the pre-tightening mechanism, the pre-tightening cylinder moves downward, and drives the spring ball linkage mechanism to rotate clockwise. In the process of rotation, the ball rod spring is compressed. When the spring ball linkage mechanism rotates to a horizontal limit position, due to the spring force of the ball rod spring and the tendency of the spring ball linkage mechanism to continue to rotate clockwise, the spring ball linkage mechanism will quickly move to the limit position to open the gravity cover under the action of the spring force. When there is a need to increase the liquid supply flow or reduce the liquid supply flow, joint liquid supply can be quickly provided for the hydraulic system or the volume of liquid supply can be quickly reduced, thereby reducing the waiting time. The quick coupling plug mechanism equipped on the valve body allows for the flexible and quick coupling of any number of liquid supply pipelines for joint liquid supply, and can realize joint liquid supply of multiple hydraulic pumping stations in hydraulic systems requiring high pressure and high flow rate. Multiple quick-connect joint liquid supply valves of the present invention may be coupled together to satisfy the use of multiple pumping stations for joint liquid supply. In addition, because the quick-connect joint liquid supply valves of the present Date Recue/Date Received 2022-05-06 invention have a small volume and can be flexibly and tightly assembled with each other, the problems of a large number of hydraulic components, occupation of much space, and complex disassembly and assembly operations of the prior art are solved.
Brief Description of the Drawings FIG. 1 is a schematic cross-sectional structural view of a quick-connect joint liquid supply valve of the present invention when the gravity cover is closed;
FIG. 2 is a schematic cross-sectional structural view of a right valve body of the quick-connect joint liquid supply valve of the present invention;
FIG. 3 is a schematic structural view of the right valve body of the quick-connect joint liquid supply valve of the present invention;
FIG. 4 is a schematic cross-sectional structural view of a left valve body of the quick-connect joint liquid supply valve of the present invention;
FIG. 5 is a schematic structural view of the left valve body of the quick-connect joint liquid supply valve of the present invention;
FIG. 6 is a schematic structural view of a pre-tightening rod of the quick-connect joint liquid supply valve of the present invention;
FIG. 7 is a schematic cross-sectional structural view of a pre-tightening choke plug of the quick-connect joint liquid supply valve of the present invention;
FIG. 8 is a schematic cross-sectional structural view of a pre-tightening cylinder of the quick-connect joint liquid supply valve of the present invention;
FIG. 9 is a schematic structural view of a pre-tightening cylinder cap of the quick-connect joint liquid supply valve of the present invention;
FIG. 10 is a schematic cross-sectional structural view of a ball rod head of the quick-connect joint liquid supply valve of the present invention;
FIG. 11 is a schematic structural view of a ball rod of the quick-connect joint liquid supply valve Date Recue/Date Received 2022-05-06 of the present invention;
FIG. 12 is a schematic structural view of an eccentric cam of the quick-connect joint liquid supply valve of the present invention;
FIG. 13 is a schematic structural view of a gravity cover connecting rod of the quick-connect joint liquid supply valve of the present invention;
FIG. 14 is a schematic structural view of a mounting base of the quick-connect joint liquid supply valve of the present invention;
FIG. 15 is a schematic structural view of a gravity cover of the quick-connect joint liquid supply valve of the present invention;
FIG. 16 is a schematic structural view of a blocking piece of the quick-connect joint liquid supply valve of the present invention;
FIG. 17 is a schematic cross-sectional structural view of a female plug of the quick-connect joint liquid supply valve of the present invention;
FIG. 18 is a schematic cross-sectional structural view of a middle choke plug of the quick-connect joint liquid supply valve of the present invention;
FIG. 19 is a schematic cross-sectional structural view of a switch of the quick-connect joint liquid supply valve of the present invention;
FIG. 20 is a schematic cross-sectional structural view of the quick-connect joint liquid supply valve of the present invention when the gravity cover is open;
FIG. 21 is a partial schematic cross-sectional structural view showing coupling of a quick coupling plug of one quick-connect joint liquid supply valve to a quick coupling plug of another quick-connect joint liquid supply valve according to the present invention;
and FIG. 22 is a schematic cross-sectional structural view of a ball rod sleeve of the quick-connect joint liquid supply valve of the present invention.
In the figures: 1 - left valve body, 2 - female plug, 3 - switch, 4 - switch spring, 5 - plug ball, 6 - 0-ring, 7 - blocking piece, 8 - choke plug spring, 9 - middle choke plug, 10 - female plug Date Recue/Date Received 2022-05-06 connection hole, 11 - metal retaining ring, 12 - gravity cover mounting screw, 13 - gravity cover, 14 - oil inlet control hole, 15 - gravity cover connecting rod, 16 - mounting base, 17 - eccentric cam, 18 - ball rod, 19 - pin, 20 - screw, 21 - oil inlet hole, 22 - oil inlet communicating hole, 23 - pre-tightening rod, 24 - pre-tightening choke plug, 25 - nut, 26 - right valve body, 27 - pre-tightening cylinder, 28 -pre-tightening spring, 29 - ball, 30 - ball rod head, 31 - ball rod sleeve, 32 - ball rod spring, 33 - pre-tightening cylinder cap, 34 - rectangular connecting rod working hole, 35 -pressure control valve chamber, 36 - top of male plug, 37 - oil outlet hole, 38 - right oil outlet chamber, 39 - base mounting groove, 40 - right valve body assembly positioning hole, 41 - ball positioning groove, 42 - ball rod mounting hole, 43 - male plug top oil through hole, 44 - right valve body connection through hole, 45 - right valve body positioning through hole, 46 - male plug, 47 - left valve body assembly positioning boss, 48 - oil inlet chamber, 49 - gravity cover mounting hole, 50 - left oil outlet chamber, 51 - threaded through hole, 52 - pre-tightening rod through hole, 53 -annular groove, 54 -ball accommodating groove, 55 - ball rod head through hole, 56 - cylindrical groove, 57 - ball rod mounting through hole, 58 - ball rod connecting boss, 59 - eccentric cam mounting through hole, 60 - eccentric cam synchronization connecting rod, 61 - guide slot, 62 - T-shaped connecting rod, 63 - oil through hole, 64 - inner hole, 65 - outer hole, 66 - truncated cone-shaped through hole, 67 - switch shoulder, 68 - vertical guide slot, 69 - mounting base boss, 70 -gravity cover connecting rod guide rod, 71 - gravity cover connecting hole, 72 - gravity cover rectangular slot, 73 - left valve body positioning through hole, 74 - pre-tightening spring mounting disc, 75 -left valve body connection through hole, 76 - mounting base connecting shaft Detailed Description of the Embodiments The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
As shown in FIG. 1 and FIG. 20, a quick-connect joint liquid supply valve of the present invention includes a right valve body 26, a left valve body 1, a pre-tightening mechanism, a spring Date Recue/Date Received 2022-05-06 ball linkage mechanism, and a quick coupling plug. The left valve body 1 and the right valve body 26 are combined in a left-right manner. The pre-tightening mechanism is arranged in the right valve body 26, two ends of the spring ball linkage mechanism are arranged in the left valve body 1 and the right valve body 26 respectively, and the quick coupling plug is arranged on the left valve body 1.
The right valve body 26 and the left valve body 1 combined together are fixed to a workbench.
As shown in FIG. 2 and FIG. 3, a lower part of the right valve body 26 is provided with a right oil outlet chamber 38, an upper part of the right valve body 26 is vertically provided with a pressure control valve chamber 35 in communication with the right oil outlet chamber 38, an oil inlet communicating hole 22 and a rectangular connecting rod working hole 34 are transversely provided on a left side of the pressure control valve chamber 35, the oil inlet communicating hole 22 is located above the rectangular connecting rod working hole 34, the oil inlet communicating hole 22 and the rectangular connecting rod working hole 34 are both in communication with the pressure control valve chamber 35, a ball rod mounting hole 42 is provided in the rectangular connecting rod working hole 34, a base mounting groove 39 is provided on a left surface of the right valve body 26, a right valve body assembly positioning hole 40 is provided with on a left side of the right oil outlet chamber 38 of the right valve body 26, a male plug 46 protruding rightward and having three stepped surfaces is provided on a right side of the right oil outlet chamber 38 of the right valve body 26, diameters of the three stepped surfaces of the male plug 46 having the three stepped surfaces gradually decrease from left to right, a middle step area of the male plug 46 is provided with a ball positioning groove 41, and a right stepped surface area of the male plug 46 is provided with external threads configured for threaded connection with an external oil pipe. As shown in FIG. 21, the male plug 46 is provided with an oil outlet hole 37 in communication with the right oil outlet chamber 38, a male plug top 36 of the male plug 46 is provided with a male plug top oil through hole 43, four transverse right valve body connection through holes 44 are respectively provided at four corners of the upper part of the .. right valve body 26, and two right valve body positioning through holes 45 are respectively provided at two corners of the lower part of the right valve body 26.
Date Recue/Date Received 2022-05-06 As shown in FIG. 4 and FIG. 5, an upper part of the left valve body 1 is provided with an oil inlet chamber 48, a lower part of the left valve body 1 is provided with a left oil outlet chamber 50, an oil inlet control hole 14 configured to communicate the oil inlet chamber 48 with the left oil outlet chamber 50 is provided between the oil inlet chamber 48 and the left oil outlet chamber 50, a top of the left valve body 1 is provided with an oil inlet hole 21 in communication with the oil inlet chamber 48, the oil inlet hole 21 is provided with internal threads, and the oil inlet chamber 48 is in communication with an external oil source through the oil inlet hole 21; a female plug connection hole 10 is provided on a left side of the left oil outlet chamber 50, and the female plug connection hole 10 is provided with internal threads; a through hole is provided on a right side of the left oil outlet chamber 50, a left valve body assembly positioning boss 47 is arranged on an outer side of the through hole, and a gravity cover mounting hole 49 is arranged in the left oil outlet chamber 50; the left valve body assembly positioning boss 47 is engaged with the right valve body assembly positioning hole 40 to axially position the left valve body 1 and the right valve body 26. Four transverse left valve body connection through holes 75 are respectively provided at four corners of the oil inlet chamber 48 in the upper part of the left valve body 1, screws 20 are respectively fastened to nuts 25 through the left valve body connection through holes 75 and the right valve body connection through holes 44 to fix the left valve body 1 and the right valve body 26 together; two left valve body positioning through holes 73 are respectively provided at two corners above the female plug connection hole 10 in the lower part of the left valve body 1, for use in combination with the two right valve body positioning through holes 45 on the right valve body 26; the left valve body 1 and the right valve body 26 are axially positioned by engagement of the left valve body assembly positioning boss 47 with the right valve body assembly positioning hole 40.
As shown in FIG. 6, FIG. 7, FIG. 8, and FIG. 9, the pre-tightening mechanism is arranged in the pressure control valve chamber 35 from top to bottom, and includes a pre-tightening rod 23, a pre-tightening choke plug 24, a pre-tightening cylinder 27, and a pre-tightening spring 28, and a pre-tightening cylinder cap 33; the pre-tightening choke plug 24 is provided with a threaded through hole Date Recue/Date Received 2022-05-06 51, an outer side of the pre-tightening choke plug 24 is threadedly connected to an upper part of the pressure control valve chamber 35, an upper part of the pre-tightening rod 23 is connected to the threaded through hole 51 of the pre-tightening choke plug 24 by external threads, a lower part of the pre-tightening rod 23 is provided with a pre-tightening spring mounting disc 74, the pretension rod 23 is configured to rotate and move by the external threads, the lower part of the pre-tightening rod 23 is arranged in the pressure control valve chamber 35 by arranging the pre-tightening choke plug 24 on the upper part of the pressure control valve chamber 35, an upper part of the pre-tightening cylinder 27 is provided with a pre-tightening rod through hole 52, an annular groove 53 is provided on an outer surface of a middle part of the pre-tightening cylinder 27, an internal threaded section is provided at a bottom of the pre-tightening cylinder 27, the pre-tightening cylinder 27 is connected to the pre-tightening spring mounting disc 74 in the lower part of the pre-tightening rod 23 through the pre-tightening rod through hole 52, a pre-tightening spring 28 is sleeved between above the pre-tightening spring mounting disc 74 and the pre-tightening cylinder 27, the external threads of the upper part of the pre-tightening rod 23 extend out of the pre-tightening rod through hole 52, an inner upper surface of the pre-tightening cylinder 27 is pressed against an upper end of the pre-tightening spring 28, the pre-tightening cylinder cap 33 is a cylindrical boss structure, and a top of the pre-tightening cylinder cap 33 is provided with a thread structure configured for connection with internal threads at the bottom of the pre-tightening cylinder 27;
As shown in FIG. 10 and FIG. 11, the spring ball linkage mechanism includes a gravity cover mounting screw 12, a gravity cover 13, a gravity cover connecting rod 15, a mounting base 16, an eccentric cam 17, a ball rod 18, a pin 19, a ball 29, a ball rod head 30, a ball rod sleeve 31, and a ball rod spring 32; the ball rod 18 includes an upper segment, a middle segment, and a lower segment, the upper segment of the ball rod 18 is provided with a cylindrical groove 56, the middle segment and the lower segment of the ball rod 18 are each of a rectangular column structure, a ball rod mounting through hole 57 is provided on the middle segment of the ball rod 18, the ball rod mounting through hole 57 is connected to the ball rod mounting hole 42 of the right valve body 26 by the pin Date Recue/Date Received 2022-05-06 19, and a ball rod connecting boss 58 is provided at an end of the lower segment of the ball rod 18;
the upper segment and the middle segment of the ball rod 18 are axially bent relative to the lower segment of the ball rod 18. As shown in FIG. 22, an upper end of the ball rod sleeve 31 is provided with a ball rod head through hole 55, a front end of the ball rod head 30 is provided with a ball accommodating groove 54, the ball 29 is mounted in the ball accommodating groove 54, and a shoulder is arranged on each of two sides of a rear part of the ball rod head 30; an upper end of the ball rod sleeve 31 is provided with a ball rod head through hole 55, the ball rod head 30 extends out of the ball rod head through hole 55 on the ball rod sleeve 31 and is in interference fit with the upper segment of the ball rod 18 through a lower end of the ball rod sleeve 31, the ball rod spring 32 is arranged between the cylindrical groove 56 and a tail of the ball rod head 30, and upper and lower ends of the ball rod spring 32 are respectively pressed against a lower surface of the ball rod head 30 and the cylindrical groove 56; the eccentric cam 17 is connected to a mounting base connecting shaft 76 through an eccentric cam mounting through hole 59 and finally mounted on the mounting base 16. As shown in FIG. 12 and FIG. 13, the mounting base 16 is fixed in the oil inlet chamber 48 by engagement of a mounting base boss 69 on one side of the mounting base 16 in the base mounting groove 39, the eccentric cam 17 is provided with the eccentric cam mounting through hole 59, the eccentric cam mounting through hole 59 is connected to an eccentric cam synchronization connecting rod 60 through a connecting shaft, one end of the eccentric cam synchronization connecting rod 60 is connected to the eccentric cam mounting through hole 59 of the eccentric cam 17, the other end of the eccentric cam synchronization connecting rod 60 is provided with a guide slot 61 along a center line thereof, and the guide slot 61 is fitted to the ball rod connecting boss 58 on the ball rod 18; the gravity cover connecting rod 15 is a frame structure arranged around a circumference of the eccentric cam 17, a T-shaped connecting rod 62 is connected below the gravity cover connecting rod 15 by a gravity cover connecting rod guide rod 70, and the gravity cover connecting rod guide rod 70 is a crankshaft structure. As shown in FIG. 15, an earring protrusion is arranged on a lower surface of the gravity cover 13, the earring protrusion is provided with a gravity cover connecting hole 71, Date Recue/Date Received 2022-05-06 the gravity cover connecting hole 71 of the gravity cover 13 is movably connected to the gravity cover mounting hole 49 in the left valve body 1 by the gravity cover mounting screw 12, gravity cover rectangular slots 72 are arranged on an upper surface of the gravity cover 13, and the gravity cover rectangular slots 72 are movably connected to the T-shaped connecting rod 62.
The quick coupling plug includes a female plug 2, a switch 3, a switch spring 4, a plug ball 5, an 0-ring 6, a blocking piece 7, a choke plug spring 8, and a middle choke plug 9, and a metal retaining ring 11; and the female plug 2 is provided with an inner hole 64 and an outer hole 65, six truncated cone-shaped through holes 66 with a large outer-side diameter and a smaller inner-side diameter are provided in a circumferential array on a wall of the outer hole 65, a bottom of the inner hole 64 is provided with internal threads for engagement with the female plug connection hole
10, a blocking piece 7 is arranged between the female plug connection hole 10 and the inner hole 64.
As shown in FIG. 16, a plurality of oil through holes 63 are provided in a center of the blocking piece 7, and the blocking piece 7 is fixed by threads. As shown in FIG. 19, a switch shoulder 67 is arranged on at a position in an axial through hole of the switch 3 close to an upper end of the switch 3, a side surface of the switch shoulder 67 is pressed against the plug ball 5, and the middle choke plug 9 is of a cone-shaped structure and is arranged between the inner hole 64 and the outer hole 65. As shown in FIG. 18, the choke plug spring 8 is arranged in the inner hole 64 between the middle choke plug 9 and the blocking piece 7, a tip of the middle choke plug 9 is placed facing toward the outer hole 65, a bottom of the middle choke plug 9 is pressed against an upper end of the choke plug spring 8 and is in close contact with an upper surface of the inner hole 64, the blocking piece 7 is screwed into the inner threads on the bottom of the inner hole 64 to press against a lower end of the choke plug spring 8, and the 0-ring 6 is mounted in a groove in the outer hole 65.
FIG. 21 is a partial cross-sectional structural view of a male plug coupled to a female plug. After coupling, the 0-ring is in close contact with the male plug to provide a sealing effect. In FIG. 21, the black cross-section of the 0-ring is in close contact with a bevel edge of the male plug.
The specific mounting position is well presented in FIG. 17, and the mounting situation is well Date Recue/Date Received 2022-05-06 presented in FIG. 1 or FIG. 20. A plug ball 5 is configured to be fitted in the truncated cone-shaped through hole 66, the switch 3 is sleeved on an outer wall of the outer hole 65 and is pressed against the plug ball 5, the metal retaining ring 11 is mounted in a groove on an outer surface of the outer hole 65, an upper surface of the switch shoulder 67 is pressed against the metal retaining ring 11, the switch spring 4 is mounted between the switch 3 and the outer wall of the outer hole 65, and upper and lower ends of the switch spring 4 are respectively pressed against a lower surface of the switch shoulder 67 and a shoulder of the female plug 2.
As shown in FIG. 14, the mounting base 16 is provided with a vertical guide slot 68, a lower end of the gravity cover connecting rod 15 is mounted in the vertical guide slot 68, a right surface of the mounting base 16 is in close contact with the left surface of the right valve body 26, a lower right end of the mounting base 16 is provided with a mounting base boss 69, the base mounting groove 39 is provided on the left surface of the right valve body 26, and the mounting base boss 69 is inserted into the base mounting groove 39.
The inner-side diameter of the truncated cone-shaped through hole 66 on the female plug 2 is smaller than a diameter of the plug ball 5, and the inner-side diameter of the truncated cone-shaped through hole 66 on the female plug 2 is larger than half the diameter of the plug ball 5; and the outer-side diameter of the truncated cone-shaped through hole 66 on the female plug 2 is larger than the diameter of the plug ball 5.
An inner diameter of the pre-tightening spring 28 is slightly larger than a diameter of the pre-tightening rod 23, an outer diameter of the pre-tightening spring 28 is slightly smaller than a diameter of the pre-tightening spring mounting disc 74, and the diameter of the pre-tightening spring mounting disc 74 is slightly smaller than an internal aperture of the pre-tightening cylinder 27; a diameter of the pre-tightening rod through hole 52 is slightly larger than the diameter of the pre-tightening rod 23, the diameter of the pre-tightening rod through hole 52 is smaller than a diameter of a lower step area of the pre-tightening choke plug 24, and the diameter of the pre-tightening rod through hole 52 is smaller than the outer diameter of the pre-tightening spring 28; a maximum outer diameter of the Date Recue/Date Received 2022-05-06 pre-tightening cylinder 27 is equal to a maximum diameter of the pre-tightening cylinder cap 33, and the maximum outer diameter of the pre-tightening cylinder 27 is equal to a diameter of the pressure control valve chamber 35, so as to divide the pressure control valve chamber 35 into upper and lower areas not in communication with each other; and after the pre-tightening choke plug 24 is mounted in the pressure control valve chamber 35, a position of a bottom of the pre-tightening cylinder cap 33 is lower than a lowermost position in the rectangular connecting rod working hole 34 and a top of the pre-tightening cylinder cap 33 is lower than a highest position of the oil inlet communicating hole 22 when a bottom of the pre-tightening choke plug 24 is in contact with the pre-tightening cylinder 27.
An upward/downward movement of the pre-tightening cylinder 27 drives the ball rod 18 to rotate clockwise/counterclockwise; when the ball rod 18 rotates clockwise to a lowermost position in the rectangular connecting rod working hole 34, the eccentric cam 17 rotates clockwise to a maximum angle position; when the ball rod 18 rotates counterclockwise to an uppermost position in the rectangular connecting rod working hole 34, the eccentric cam 17 rotates counterclockwise to the maximum angle position; and when the eccentric cam 17 rotates to the maximum angle position, the gravity cover connecting rod 15 is moved upward/downward, to push the gravity cover 13 to open/close by rotating about the pin 19.
An aperture of the ball accommodating groove 54 is smaller than a diameter of the ball rod 18;
a diameter of the ball rod head through hole 55 is slightly larger than a diameter of the ball rod head 30, the diameter of the ball rod head through hole 55 is smaller than a diameter of the shoulder of the ball rod head 30, a sum of a length of the ball rod head 30 and a height of the ball rod spring 32 when fully compressed is greater than a depth of the cylindrical groove 56 on the upper segment of the ball rod 18, the ball rod head 30 extends into the annular groove 53 on the outer surface of the pre-tightening cylinder 27, the ball rod spring 32 axially urges against a bottom of the ball rod head 30, and the ball 29 in the ball accommodating groove on the front end of the ball rod head 30 is tangent to an inner surface of the annular groove 53 and is in close contact with the inner surface of Date Recue/Date Received 2022-05-06 the annular groove 53; an outer diameter of the ball rod spring 32 is slightly smaller than the diameter of the shoulder of the ball rod head 30; a diameter of the ball rod connecting boss 58 is equal to a width of the guide slot 61; a diameter of the gravity cover connecting rod guide rod 70 is equal to a width of the vertical guide slot 68; and when the ball rod head 30 is located at an uppermost position in the rectangular connecting rod working hole 34, the gravity cover connecting rod 15 pulls the gravity cover 13 so that the gravity cover 13 is in close contact with an upper surface of the left oil outlet chamber 50, to realize closing of the oil inlet control hole 14 at an upper limit position.
A working method for the quick-connect joint liquid supply valve described above is provided, including the following steps.
Hydraulic oil enters the oil inlet chamber 48 of the left valve body 1 through the oil inlet hole, and enters an upper part of the oil inlet chamber 48 through the oil inlet communicating hole 22 of the right valve body 26. After pressure of the hydraulic oil rises to be greater than a sum of hydraulic oil pressure in a lower part of the oil inlet chamber 48 and a pre-tightening force of the pre-tightening spring 28, the pre-tightening cylinder 27 moves downward to drive the ball rod head to move downward, and the ball rod head drives the ball rod to rotate clockwise, to gradually compress the ball rod spring 32. When the ball rod rotates clockwise to a horizontal position, the ball rod spring 32 reaches a maximum compression amount and tends to return to an original length, the ball rod continues to rotate clockwise, the ball rod spring 32 instantly springs back and pushes the ball rod head 18 to move downward along an inner surface of the annular groove 53, and the ball rod 18 quickly rotates clockwise to a lowermost position to drive the eccentric cam 17 to rotate clockwise and push the gravity cover connecting rod 15 to move downward, so that the gravity cover 13 is pushed downward and opened to realize instant communication between the oil inlet chamber 48 and the left oil outlet chamber 50 of the left valve body 1. When the pressure of the hydraulic oil drops to below the sum of the hydraulic oil pressure in the lower part of the oil inlet chamber 48 and the pre-tightening force of the pre-tightening spring 28, the pre-tightening cylinder 27 moves upward to drive the ball rod head 30 to move upward, and the ball rod head 30 drives the ball rod 18 to rotate Date Recue/Date Received 2022-05-06 counterclockwise, to gradually compress the ball rod spring 32. When the ball rod 18 rotates counterclockwise to a horizontal position, the ball rod spring 32 reaches a maximum compression amount and tends to return to an original length, the ball rod 18 continues to rotate counterclockwise, the ball rod spring 32 springs back and pushes the ball rod head 30 to move upward along the inner surface of the annular groove 53, and the ball rod 18 quickly rotates counterclockwise to an uppermost position to drive the eccentric cam 17 to rotate counterclockwise and push the gravity cover connecting rod 15 to move upward, so that the gravity cover 13 is pulled upward and closed to instantly cut off the communication between the oil inlet chamber 48 and the left oil outlet chamber 50 of the left valve body 1.
A quick coupling method for the quick-connect joint liquid supply valve described above is provided, including the following steps.
The switch 3 of the female plug 2 of a first quick-connect joint liquid supply valve is turned rightward to cause the plug ball 5 to exit outward, the male plug 46 of a second quick-connect joint liquid supply valve is inserted into the outer hole of the female plug 2 of the first quick-connect joint liquid supply valve, and as the male plug 46 continues to be pushed toward inside of the female plug 2, the plug ball 5 is engaged into the ball positioning groove 41 on the male plug 46. At the same time, the top of the male plug 46 pushes the middle choke plug 9 inside the female plug 2 to leave the upper surface of the inner hole of the female plug 2, so that flow channels in the male plug 46 and the female plug 2 become in communication with each other, thus completing coupling of the two quick-connect joint liquid supply valves. At this moment, the switch 3 is released, the switch spring 4 springs back to cause the switch 3 to return to the initial position, and the switch shoulder 67 is pressed against the plug ball 5, so that the plug ball 5 cannot automatically exit from the ball positioning groove 41, thus completing coupling and fixing of the two quick-connect joint liquid supply valves. After the coupling is completed, the switch of the female plug 2 of the first quick-connect joint liquid supply valve is turned rightward to cause the switch shoulder 67 to leave the plug ball 5, the plug ball 5 exits from the ball positioning groove 41, the compressed choke plug Date Recue/Date Received 2022-05-06 spring 8 pushes the middle choke plug 9 to approach the upper surface of the inner hole of the female plug 2, and the middle choke plug 9 is pressed against the top of the male plug 46 to push the male plug 46 to exit from the outer hole of the female plug 2, to complete separation of the two quick-connect joint liquid supply valves.

Date Recue/Date Received 2022-05-06

Claims (10)

Claims What is claimed is:
1. A quick-connect joint liquid supply valve, characterized by comprising a right valve body (26), a left valve body (1), a pre-tightening mechanism, a spring ball linkage mechanism, and a quick coupling plug, wherein the left valve body (1) and the right valve body (26) are combined in a left-right manner, the pre-tightening mechanism is arranged in the right valve body (26), two ends of the spring ball linkage mechanism are arranged in the left valve body (1) and the right valve body (26) respectively, and the quick coupling plug is arranged on the left valve body (1);
a lower part of the right valve body (26) is provided with a right oil outlet chamber (38), an upper part of the right valve body (26) is vertically provided with a pressure control valve chamber (35) in communication with the right oil outlet chamber (38), an oil inlet communicating hole (22) and a rectangular connecting rod working hole (34) are transversely provided on a left side of the pressure control valve chamber (35), the oil inlet communicating hole (22) is located above the rectangular connecting rod working hole (34), the oil inlet communicating hole (22) and the rectangular connecting rod working hole (34) are both in communication with the pressure control valve chamber (35), a ball rod mounting hole (42) is provided in the rectangular connecting rod working hole (34), a base mounting groove (39) is provided on a left surface of the right valve body (26), a right valve body assembly positioning hole (40) is provided with on a left side of the right oil outlet chamber (38) of the right valve body (26), a male plug (46) protruding rightward and having three stepped surfaces is provided on a right side of the right oil outlet chamber (38) of the right valve body (26), diameters of the three stepped surfaces of the male plug (46) having the three stepped surfaces gradually decrease from left to right, a middle step area of the male plug (46) is provided with a ball positioning groove (41), a right stepped surface area of the male plug (46) is provided with external threads configured for threaded connection with an external oil pipe, the male plug (46) is provided with an oil outlet hole (37) in communication with the right oil outlet chamber (38), a male plug top (36) of the male plug (46) is provided with a male plug top oil through hole (43), four Date Recue/Date Received 2022-05-06 transverse right valve body connection through holes (44) are respectively provided at four corners of the upper part of the right valve body (26), and two right valve body positioning through holes (45) are respectively provided at two corners of the lower part of the right valve body (26);
an upper part of the left valve body (1) is provided with an oil inlet chamber (48), a lower part of the left valve body (1) is provided with a left oil outlet chamber (50), an oil inlet control hole (14) configured to communicate the oil inlet chamber (48) with the left oil outlet chamber (50) is provided between the oil inlet chamber (48) and the left oil outlet chamber (50), a top of the left valve body (1) is provided with an oil inlet hole (21) in communication with the oil inlet chamber (48), the oil inlet hole (21) is provided with internal threads, and the oil inlet chamber (48) is in communication with an external oil source through the oil inlet hole (21); a female plug connection hole (10) is provided on a left side of the left oil outlet chamber (50), and the female plug connection hole (10) is provided with internal threads; a through hole is provided on a right side of the left oil outlet chamber (50), a left valve body assembly positioning boss (47) is arranged on an outer side of the through hole, and a gravity cover mounting hole (49) is arranged in the left oil outlet chamber (50);
four transverse left valve body connection through holes (75) are respectively provided at four corners of the oil inlet chamber (48) in the upper part of the left valve body (1), screws (20) are respectively fastened to nuts (25) through the left valve body connection through holes (75) and the right valve body connection through holes (44) to fix the left valve body (1) and the right valve body (26) together; two left valve body positioning through holes (73) are respectively provided at two corners above the female plug connection hole (10) in the lower part of the left valve body (1), for use in combination with the two right valve body positioning through holes (45) on the right valve body (26);
the pre-tightening mechanism is arranged in the pressure control valve chamber (35) from top to bottom, and comprises a pre-tightening rod (23), a pre-tightening choke plug (24), a pre-tightening cylinder (27), and a pre-tightening spring (28), and a pre-tightening cylinder cap (33); the pre-tightening choke plug (24) is provided with a threaded through hole (51), an outer side of the pre-Date Recue/Date Received 2022-05-06 tightening choke plug (24) is threadedly connected to an upper part of the pressure control valve chamber (35), an upper part of the pre-tightening rod (23) is connected to the threaded through hole (51) of the pre-tightening choke plug (24) by external threads, a lower part of the pre-tightening rod (23) is provided with a pre-tightening spring mounting disc (74), the pretension rod (23) is configured to rotate and move by the external threads, the lower part of the pre-tightening rod (23) is arranged in the pressure control valve chamber (35) by arranging the pre-tightening choke plug (24) on the upper part of the pressure control valve chamber (35), an upper part of the pre-tightening cylinder (27) is provided with a pre-tightening rod through hole (52), an annular groove (53) is provided on an outer surface of a middle part of the pre-tightening cylinder (27), an internal threaded section is provided at a bottom of the pre-tightening cylinder (27), the pre-tightening cylinder (27) is connected to the pre-tightening spring mounting disc (74) in the lower part of the pre-tightening rod (23) through the pre-tightening rod through hole (52), a pre-tightening spring (28) is sleeved between above the pre-tightening spring mounting disc (74) and the pre-tightening cylinder (27), the external threads of the upper part of the pre-tightening rod (23) extend out of the pre-tightening rod through hole (52), an inner upper surface of the pre-tightening cylinder (27) is pressed against an upper end of the pre-tightening spring (28), the pre-tightening cylinder cap (33) is a cylindrical boss structure, and a top of the pre-tightening cylinder cap (33) is provided with a thread structure configured for connection with internal threads at the bottom of the pre-tightening cylinder (27);
the spring ball linkage mechanism comprises a gravity cover mounting screw (12), a gravity cover (13), a gravity cover connecting rod (15), a mounting base (16), an eccentric cam (17), a ball rod (18), a pin (19), a ball (29), a ball rod head (30), a ball rod sleeve (31), and a ball rod spring (32); the ball rod (18) comprises an upper segment, a middle segment, and a lower segment, the upper segment of the ball rod (18) is provided with a cylindrical groove (56), the middle segment and the lower segment of the ball rod (18) are each of a rectangular column structure, a ball rod mounting through hole (57) is provided on the middle segment of the ball rod (18), the ball rod mounting through hole (57) is connected to the ball rod mounting hole (42) of the right valve body (26) by the pin (19), and Date Recue/Date Received 2022-05-06 a ball rod connecting boss (58) is provided at an end of the lower segment of the ball rod (18); the upper segment and the middle segment of the ball rod (18) are axially bent relative to the lower segment of the ball rod (18); a front end of the ball rod head (30) is provided with a ball accommodating groove (54), the ball (29) is mounted in the ball accommodating groove (54), and a shoulder is arranged on each of two sides of a rear part of the ball rod head (30); an upper end of the ball rod sleeve (31) is provided with a ball rod head through hole (55), the ball rod head (30) extends out of the ball rod head through hole (55) on the ball rod sleeve (31) and is in interference fit with the upper segment of the ball rod (18) through a lower end of the ball rod sleeve (31), the ball rod spring (32) is arranged between the cylindrical groove (56) and a tail of the ball rod head (30), and .. upper and lower ends of the ball rod spring (32) are respectively pressed against a lower surface of the ball rod head (30) and the cylindrical groove (56); the eccentric cam (17) is connected to a mounting base connecting shaft (76) through an eccentric cam mounting through hole (59) and finally mounted on the mounting base (16), the mounting base (16) is fixed in the oil inlet chamber (48) by engagement of a mounting base boss (69) on one side of the mounting base (16) in the base mounting groove (39), the eccentric cam (17) is provided with the eccentric cam mounting through hole (59), the eccentric cam mounting through hole (59) is connected to an eccentric cam synchronization connecting rod (60) through a connecting shaft, one end of the eccentric cam synchronization connecting rod (60) is connected to the eccentric cam mounting through hole (59) of the eccentric cam (17), the other end of the eccentric cam synchronization connecting rod (60) is provided with a guide slot (61) along a center line thereof, and the guide slot (61) is fitted to the ball rod connecting boss (58) on the ball rod (18); the gravity cover connecting rod (15) is a frame structure arranged around a circumference of the eccentric cam (17), a T-shaped connecting rod (62) is connected below the gravity cover connecting rod (15) by a gravity cover connecting rod guide rod (70), the gravity cover connecting rod guide rod (70) is a crankshaft structure, an earring protrusion is arranged on a lower surface of the gravity cover (13), the earring protrusion is provided with a gravity cover connecting hole (71), the gravity cover connecting hole (71) of the gravity cover Date Recue/Date Received 2022-05-06 (13) is movably connected to the gravity cover mounting hole (49) in the left valve body (1) by the gravity cover mounting screw (12), gravity cover rectangular slots (72) are arranged on an upper surface of the gravity cover (13), and the gravity cover rectangular slots (72) are movably connected to the T-shaped connecting rod (62);
the quick coupling plug comprises a female plug (2), a switch (3), a switch spring (4), a plug ball (5), an 0-ring (6), a blocking piece (7), a choke plug spring (8), and a middle choke plug (9), and a metal retaining ring (11); and the female plug (2) is provided with an inner hole (64) and an outer hole (65), six truncated cone-shaped through holes (66) with a large outer-side diameter and a smaller inner-side diameter are provided in a circumferential array on a wall of the outer hole (65), a bottom of the inner hole (64) is provided with internal threads for engagement with the female plug connection hole (10), a blocking piece (7) is arranged between the female plug connection hole (10) and the inner hole (64), a plurality of oil through holes (63) are provided in a center of the blocking piece (7), the blocking piece (7) is fixed by threads, a switch shoulder (67) is arranged at a position in an axial through hole of the switch (3) close to an upper end of the switch (3), a side surface of the switch shoulder (67) is pressed against the plug ball (5), the middle choke plug (9) is of a cone-shaped structure and is arranged between the inner hole (64) and the outer hole (65), the choke plug spring (8) is arranged in the inner hole (64) between the middle choke plug (9) and the blocking piece (7), a tip of the middle choke plug (9) is placed facing toward the outer hole (65), a bottom of the middle choke plug (9) is pressed against an upper end of the choke plug spring (8) and is in close contact with an upper surface of the inner hole (64), the blocking piece (7) is screwed into the inner threads on the bottom of the inner hole (64) to press against a lower end of the choke plug spring (8), the 0-ring (6) is mounted in a groove in the outer hole (65), the plug ball (5) is configured to be fitted in the truncated cone-shaped through hole (66), the switch (3) is sleeved on an outer wall of the outer hole (65) and is pressed against the plug ball (5), the metal retaining ring (11) is mounted in a groove on an outer surface of the outer hole (65), an upper surface of the switch shoulder (67) is pressed against the metal retaining ring (11), the switch spring (4) is mounted between the switch (3) and the Date Recue/Date Received 2022-05-06 outer wall of the outer hole (65), and upper and lower ends of the switch spring (4) are respectively pressed against a lower surface of the switch shoulder (67) and a shoulder of the female plug (2).
2. The quick-connect joint liquid supply valve according to claim 1, characterized in that the right valve body (26) and the left valve body (1) combined together are fixed to a workbench.
3. The quick-connect joint liquid supply valve according to claim 1, characterized in that the left valve body (1) and the right valve body (26) are axially positioned by engagement of the left valve body assembly positioning boss (47) with the right valve body assembly positioning hole (40).
4. The quick-connect joint liquid supply valve according to claim 1, characterized in that the mounting base (16) is provided with a vertical guide slot (68), a lower end of the gravity cover connecting rod (15) is mounted in the vertical guide slot (68), a right surface of the mounting base (16) is in close contact with the left surface of the right valve body (26), a lower right end of the mounting base (16) is provided with a mounting base boss (69), the base mounting groove (39) is provided on the left surface of the right valve body (26), and the mounting base boss (69) is inserted into the base mounting groove (39).
5. The quick-connect joint liquid supply valve according to claim 1, characterized in that the inner-side diameter of the truncated cone-shaped through hole (66) on the female plug (2) is smaller than a diameter of the plug ball (5), and the inner-side diameter of the truncated cone-shaped through hole (66) on the female plug (2) is larger than half the diameter of the plug ball (5); and the outer-side diameter of the truncated cone-shaped through hole (66) on the female plug (2) is larger than the diameter of the plug ball (5).
6. The quick-connect joint liquid supply valve according to claim 1, characterized in that an inner diameter of the pre-tightening spring (28) is slightly larger than a diameter of the pre-tightening rod (23), an outer diameter of the pre-tightening spring (28) is slightly smaller than a diameter of the pre-tightening spring mounting disc (74), and the diameter of the pre-tightening spring mounting disc (74) is slightly smaller than an internal aperture of the pre-tightening cylinder (27); a diameter of the pre-tightening rod through hole (52) is slightly larger than the diameter of the pre-tightening rod (23), Date Recue/Date Received 2022-05-06 the diameter of the pre-tightening rod through hole (52) is smaller than a diameter of a lower step area of the pre-tightening choke plug (24), and the diameter of the pre-tightening rod through hole (52) is smaller than the outer diameter of the pre-tightening spring (28); a maximum outer diameter of the pre-tightening cylinder (27) is equal to a maximum diameter of the pre-tightening cylinder cap (33), and the maximum outer diameter of the pre-tightening cylinder (27) is slightly smaller than a diameter of the pressure control valve chamber (35), so as to divide the pressure control valve chamber (35) into upper and lower areas not in communication with each other;
and after the pre-tightening choke plug (24) is mounted in the pressure control valve chamber (35), a position of a bottom of the pre-tightening cylinder cap (33) is lower than a lowermost position in the rectangular connecting rod working hole (34) and a top of the pre-tightening cylinder cap (33) is lower than a highest position of the oil inlet communicating hole (22) when a bottom of the pre-tightening choke plug (24) is in contact with the pre-tightening cylinder (27).
7. The quick-connect joint liquid supply valve according to claim 1, characterized in that an upward/downward movement of the pre-tightening cylinder (27) drives the ball rod (18) to rotate clockwise/counterclockwise; when the ball rod (18) rotates clockwise to a lowermost position in the rectangular connecting rod working hole (34), the eccentric cam (17) rotates clockwise to a maximum angle position; when the ball rod (18) rotates counterclockwise to an uppermost position in the rectangular connecting rod working hole (34), the eccentric cam (17) rotates counterclockwise to the maximum angle position; and when the eccentric cam (17) rotates to the maximum angle position, the gravity cover connecting rod (15) is moved upward/downward, to push the gravity cover (13) to open/close by rotating about the pin (19).
8. The quick-connect joint liquid supply valve according to claim 1, characterized in that an aperture of the ball accommodating groove (54) is smaller than a diameter of the ball rod (18); a diameter of the ball rod head through hole (55) is slightly larger than a diameter of the ball rod head (30), the diameter of the ball rod head through hole (55) is smaller than a diameter of the shoulder of the ball rod head (30), a sum of a length of the ball rod head (30) and a height of the ball rod spring (32) Date Recue/Date Received 2022-05-06 when fully compressed is greater than a depth of the cylindrical groove (56) on the upper segment of the ball rod (18), the ball rod head (30) extends into the annular groove (53) on the outer surface of the pre-tightening cylinder (27), the ball rod spring (32) axially urges against a bottom of the ball rod head (30), and the ball (29) in the ball accommodating groove on the front end of the ball rod head (30) is tangent to an inner surface of the annular groove (53) and is in close contact with the inner surface of the annular groove (53); an outer diameter of the ball rod spring (32) is slightly smaller than the diameter of the shoulder of the ball rod head (30); a diameter of the ball rod connecting boss (58) is equal to a width of the guide slot (61); a diameter of the gravity cover connecting rod guide rod (70) is equal to a width of the vertical guide slot (68); and when the ball .. rod head (30) is located at an uppermost position in the rectangular connecting rod working hole (34), the gravity cover connecting rod (15) pulls the gravity cover (13) so that the gravity cover (13) is in close contact with an upper surface of the left oil outlet chamber (50), to realize closing of the oil inlet control hole (14) at an upper limit position.
9. A working method for the quick-connect joint liquid supply valve according to claim 1, .. characterized by comprising:
hydraulic oil entering the oil inlet chamber (48) of the left valve body (1) through the oil inlet hole, and entering an upper part of the oil inlet chamber (48) through the oil inlet communicating hole (22) of the right valve body (26); after pressure of the hydraulic oil rises to be greater than a sum of hydraulic oil pressure in a lower part of the oil inlet chamber (48) and a pre-tightening force of the pre-tightening spring (28), the pre-tightening cylinder (27) moving downward to drive the ball rod head to move downward, and the ball rod head driving the ball rod to rotate clockwise, to gradually compress the ball rod spring (32); when the ball rod rotates clockwise to a horizontal position, the ball rod spring (32) reaching a maximum compression amount and tending to return to an original length, the ball rod continuing to rotate clockwise, the ball rod spring(32) instantly springing back and pushing the ball rod head (18) to move downward along an inner surface of the annular groove (53), and the ball rod (18) quickly rotating clockwise to a lowermost position to drive the eccentric Date Recue/Date Received 2022-05-06 cam (17) to rotate clockwise and push the gravity cover connecting rod (15) to move downward, so that the gravity cover (13) is pushed downward and opened to realize instant communication between the oil inlet chamber (48) and the left oil outlet chamber (50) of the left valve body (1); when the pressure of the hydraulic oil drops to below the sum of the hydraulic oil pressure in the lower part of the oil inlet chamber (48) and the pre-tightening force of the pre-tightening spring (28), the pre-tightening cylinder (27) moving upward to drive the ball rod head (30) to move upward, and the ball rod head (30) driving the ball rod (18) to rotate counterclockwise, to gradually compress the ball rod spring (32); when the ball rod (18) rotates counterclockwise to a horizontal position, the ball rod spring (32) reaching a maximum compression amount and tending .. to return to an original length, the ball rod (18) continuing to rotate counterclockwise, the ball rod spring (32) springing back and pushing the ball rod head (30) to move upward along the inner surface of the annular groove (53), and the ball rod (18) quickly rotating counterclockwise to an uppermost position to drive the eccentric cam (17) to rotate counterclockwise and push the gravity cover connecting rod (15) to move upward, so that the gravity cover (13) is pulled upward and closed to instantly cut off the communication between the oil inlet chamber (48) and the left oil outlet chamber (50) of the left valve body (1).
10. A quick coupling method for the quick-connect joint liquid supply valve according to claim 1, characterized by comprising:
turning the switch (3) of the female plug (2) of a first quick-connect joint liquid supply valve rightward to cause the plug ball (5) to exit outward, inserting the male plug (46) of a second quick-connect joint liquid supply valve into the outer hole of the female plug (2) of the first quick-connect joint liquid supply valve, and as the male plug (46) continues to be pushed toward inside of the female plug (2), the plug ball (5) being engaged into the ball positioning groove (41) on the male plug (46); at the same time, the top of the male plug (46) pushing the middle choke plug (9) inside the female plug (2) to leave the upper surface of the inner hole of the female plug (2), so that flow channels in the male plug (46) and the female plug (2) become in communication with each other, Date Recue/Date Received 2022-05-06 thus completing coupling of the two quick-connect joint liquid supply valves;
at this moment, releasing the switch (3), the switch spring (4) springing back to cause the switch (3) to return to the initial position, and the switch shoulder (67) being pressed against the plug ball (5), so that the plug ball (5) cannot automatically exit from the ball positioning groove (41), thus completing coupling .. and fixing of the two quick-connect joint liquid supply valves; after the coupling is completed, turning the switch of the female plug (2) of the first quick-connect joint liquid supply valve rightward to cause the switch shoulder (67) to leave the plug ball (5), the plug ball (5) exiting from the ball positioning groove (41), the compressed choke plug spring (8) pushing the middle choke plug (9) to approach the upper surface of the inner hole of the female plug (2), and the middle choke plug (9) being pressed against the top of the male plug (46) to push the male plug (46) to exit from the outer hole of the female plug (2), to complete separation of the two quick-connect joint liquid supply valves.

Date Recue/Date Received 2022-05-06
CA3158531A 2020-11-05 2021-02-07 Quick-connect joint liquid supply valve, and use method and quick coupling method thereof Pending CA3158531A1 (en)

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CN202011224379.6A CN112253821B (en) 2020-11-05 2020-11-05 Fast-assembling combined liquid supply valve, use method and fast splicing method
CN202011224379.6 2020-11-05
PCT/CN2021/075748 WO2022095304A1 (en) 2020-11-05 2021-02-07 Fast-assembly combined liquid supply valve, usage method, and fast assembly method

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CN112253821B (en) * 2020-11-05 2021-07-30 中国矿业大学 Fast-assembling combined liquid supply valve, use method and fast splicing method
CN114833770B (en) * 2022-05-30 2023-06-23 四川恒铭泽石油天然气工程有限公司 Automatic taking-out tool for throttle valve sleeve and use method thereof

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CN104879340B (en) * 2015-04-20 2017-01-11 大连理工大学 Alternating-current flow proportion regulation control device
CN106122575B (en) * 2016-07-04 2021-03-19 河北秦汉电子科技有限公司 Mechanical electromagnetic type gas emergency cut-off valve
CN107504201B (en) * 2017-10-09 2019-02-19 中国矿业大学 A kind of dual spring high-precision hysteresis type pressure-control valve
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CN112253821A (en) 2021-01-22

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