Push valve and push cylinder speed regulating system

Abstract

The application discloses a push valve and a push cylinder speed regulating system, and the push valve comprises a valve body, a control damper, a buffer control valve, a push one-way lock and a plug; the push one-way lock comprises a valve seat, a piston rod, a spring, a valve cap and a valve seat sealing ring; the valve seat sealing ring is arranged on the valve seat; the valve seat is connected with the valve body in a threaded mode; the valve cap is communicated with a control port; the spring is arranged between the piston rod and the valve seat; a first interface is communicated with a spring cavity in the push one-way lock; when the push one-way lock is closed, a second interface is communicated with a piston rod sealing cavity; a liquid passage between the first interface and the second interface is communicated with the buffer control valve; the control port is communicated with a control cavity at the bottom of the valve cap, and the control port is provided with the control damper; an adjusting port is communicated with the first interface and the second interface, and the adjusting port is provided with the buffer control valve; and the plug is arranged on the adjusting port. The application effectively solves the problem that the impact force is large during the starting, running and closing process of the push cylinder of the hydraulic support, and the hydraulic support is easily damaged due to mechanical impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of push-moving oil cylinder control, and particularly relates to a push-moving valve and a push-moving oil cylinder speed regulation system. BACKGROUND

[0002] The hydraulic support in a coal mine is mainly a supporting device for controlling the mine pressure of a coal mining face. When the push-moving and pull-moving actions of the hydraulic support control system are performed, high-speed impact is generated in the movement process of the push-moving oil cylinder, the impact force is large, and the movement speed of the push-moving oil cylinder cannot be accurately controlled in the starting, running and closing processes, so that the hydraulic support is damaged by mechanical impact.

[0003] At present, in the prior art, a throttle valve is designed to control the movement speed of the push-moving oil cylinder, and the buffering effect is achieved through the throttling effect of the throttle valve. In this technology, the throttling effect only exists in the liquid inlet channel of the push-moving oil cylinder, and the push-moving speed and time are uncontrollable and cannot be adjusted. In addition, in the prior art, a controllable throttle valve is used to limit the position of the valve core in the liquid passage by controlling the medium flowing through the liquid passage, and the throttling is performed through the throttling hole on the valve core to achieve the purpose of controlling the movement speed of the push-moving oil cylinder. In this technology, the moving position of the valve core of the controllable throttle valve is controlled by the medium flowing into the liquid passage, the control precision is low, and the throttling hole on the valve core is not adjustable. SUMMARY

[0004] In view of the problems in the prior art, the main purpose of the embodiments of the present application is to provide a push-moving valve and a push-moving oil cylinder speed regulation system to accurately control the movement speed of the push-moving oil cylinder.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide a push-moving valve, which comprises a valve body, a control damper, a buffer control valve, a push-moving one-way lock and a plug; wherein the valve body is provided with a first interface, a second interface, a control port and an adjusting port;

[0006] The push-moving one-way lock comprises a valve seat, a piston rod, a spring, a valve cap and a valve seat sealing ring; wherein the valve seat sealing ring is arranged on the valve seat; the valve seat is connected with the valve body in a threaded form; the valve cap is in communication with the control port; the spring is arranged between the piston rod and the valve seat;

[0007] The first interface is in communication with the spring cavity of the spring in the push-moving one-way lock; when the push-moving one-way lock is closed, the second interface is in communication with the piston rod sealing cavity; the liquid passage between the first interface and the second interface is in communication with the buffer control valve; the control port is in communication with the control cavity at the bottom of the valve cap, and the control port is provided with a control damper; the adjusting port is in communication with the first interface and the second interface, and the adjusting port is provided with a buffer control valve;

[0008] The plug is arranged on the adjusting port and is used for plugging the adjusting port.

[0009] Optionally, in an embodiment of the present application, the push-type check valve further comprises a bonnet seal ring arranged between the control chamber of the bottom of the bonnet and the second port.

[0010] Optionally, in an embodiment of the present application, the push-type check valve further comprises a piston rod seal ring arranged between the inner cavity of the valve seat and the first port.

[0011] Optionally, in an embodiment of the present application, the push-type check valve further comprises a sealing valve pad and a retainer ring arranged between the valve seat and the valve body.

[0012] Optionally, in an embodiment of the present application, when the control port is not connected to the control medium, the piston rod is in contact with the sealing valve pad under the spring force of the spring and the hydraulic pressure of the first port, so that the push-type check valve is closed.

[0013] Optionally, in an embodiment of the present application, a sealing cone and a drainage channel are arranged on the piston rod.

[0014] When the push-type check valve is closed, the sealing cone is in contact with the sealing valve pad.

[0015] When the push-type check valve is closed, the drainage channel is in communication with the second port and the inner cavity of the valve seat; when the push-type check valve is opened, the drainage channel is in communication with the first port, the second port and the inner cavity of the valve seat.

[0016] Optionally, in an embodiment of the present application, when the control port is connected to the control medium, the control medium overcomes the spring force of the spring and the hydraulic pressure of the first port by using the control damper to push the bonnet and the piston rod downward, so that the sealing cone of the piston rod is separated from the sealing valve pad, the first port is in communication with the second port, and the push-type check valve is opened.

[0017] Optionally, in an embodiment of the present application, when the control port is not connected to the control medium and the first port is in an open state or a return state, the piston rod overcomes the spring force of the spring by using the hydraulic pressure of the second port to move downward, so that the sealing cone of the piston rod is separated from the sealing valve pad, and the push-type check valve is in a check valve state.

[0018] The embodiment of the present application further provides a push-type cylinder speed regulation system, which comprises a push-type cylinder, a first electro-hydraulic control reversing valve, a second electro-hydraulic control reversing valve, a third electro-hydraulic control reversing valve, a control check valve, a booster pump, an oil tank and a push valve as described above; wherein the push-type cylinder is provided with a rodless cavity and a rod cavity.

[0019] The push valve regulates the running speed of the push-type cylinder through the control check valve; wherein the second port in the push valve is connected to the rodless cavity or the rod cavity through the control check valve, the first port in the push valve is connected to the second electro-hydraulic control reversing valve, and the control port in the push valve is connected to the third electro-hydraulic control reversing valve.

[0020] The booster pump is connected with the oil tank to provide a stable pressure oil source.

[0021] Optionally, in an embodiment of the present application, the system further comprises a safety valve connected with the booster pump and the oil tank to stabilize the hydraulic pressure.

[0022] The push valve of the present application combines the push one-way lock and the buffer control valve, accurately controls the running speed of the push cylinder by controlling the opening of the push one-way lock and combining the buffer control valve, and effectively eliminates the impact generated in the process of switching different running speeds by setting a special control damper on the push valve. At the same time, the buffer control valve can adjust the running speed of the push cylinder to the required speed, and the control process is controllable and adjustable, with high control accuracy, so as to accurately control the running speed of the push cylinder in the starting, running and closing processes, and make the push cylinder realize the movement process of slow starting, fast pushing in the middle process and slow stopping at the end of pushing, with accurate and adjustable running time and running speed of the push cylinder in the process, effectively solving the problem that the impact force is large in the starting, running and closing processes of the hydraulic support push cylinder, and the hydraulic support is easy to be damaged by mechanical impact. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 FIG. 1 is a structural schematic diagram of a push valve according to an embodiment of the present application;

[0025] Figure 2 FIG. 2 is a sectional view of the push valve according to an embodiment of the present application;

[0026] Figure 3 FIG. 3 is a sectional view of a valve body according to an embodiment of the present application;

[0027] Figure 4 FIG. 4 is a schematic diagram of the outer shape of the valve body according to an embodiment of the present application;

[0028] Figure 5 FIG. 5 is a sectional view of a push one-way lock according to an embodiment of the present application;

[0029] Figure 6 FIG. 6 is a schematic diagram of a buffer control valve according to an embodiment of the present application;

[0030] Figure 7 FIG. 7 is a schematic diagram of a valve seat according to an embodiment of the present application;

[0031] Figure 8A schematic diagram of a piston rod in the embodiment of the present application;

[0032] Figure 9 A schematic diagram of a valve cap in the embodiment of the present application;

[0033] Figure 10 A schematic diagram of a sealing valve pad in the embodiment of the present application;

[0034] Figure 11 A schematic diagram of a retaining ring in the embodiment of the present application;

[0035] Figure 12 A schematic diagram of a push oil cylinder speed regulation system in the embodiment of the present application. DETAILED DESCRIPTION

[0036] The embodiment of the present application provides a push valve and a push oil cylinder speed regulation system.

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] At present, in the prior art, a throttle valve is designed to control the running speed of a push oil cylinder, and a buffering effect is achieved through the throttling effect of the throttle valve. The throttle valve is arranged in a liquid inlet passage of the push oil cylinder, and the liquid entering the push oil cylinder is limited through the throttle valve, so as to control the running speed of the push oil cylinder.

[0039] In the technology, the throttling effect only exists in the liquid inlet passage of the push oil cylinder, the throttle valve is a fixed-size damping hole, the liquid entering the push oil cylinder through the throttle valve is fixed, the push displacement and the push time under the required speed cannot be adjusted and controlled, and the push speed cannot be adjusted. In addition, when the push oil cylinder needs to quickly return liquid, the push oil cylinder generates a large back pressure during liquid return due to the influence of the throttle valve, and the medium passing through the throttle valve is throttled, which has a certain influence on the quick liquid return of the push oil cylinder.

[0040] Moreover, the prior art also discloses a method for controlling the operation speed of a push-moving oil cylinder by using a controllable throttle valve.

[0041] In the technology, the moving position of the valve core of the controllable throttle valve is limited by the control interface by inputting or discharging control medium, the valve core moves from the normally open position to the throttling position or reversely, the adjustability of the control medium inputted into the control interface is high, the throttling channel of the valve core is a fixed hole and is not adjustable, and the control precision and the adjustment stability are low.

[0042] The present application provides a precise push-moving valve, which is combined with a push-moving one-way lock and a buffer control valve to form a precise push-moving oil cylinder speed regulation system, monitors the operation displacement or operation time of the push-moving oil cylinder through the speed regulation system, opens or closes the push-moving one-way lock at a required time, and combines the special buffer control valve to accurately control the operation speed of the push-moving oil cylinder, so that the push-moving oil cylinder realizes a movement process of slow starting, fast pushing in the middle process and slow stopping at the end of pushing, and the operation time, operation displacement and operation speed of the push-moving oil cylinder at a required moving speed are accurately adjustable.

[0043] As shown in Figure 1 The push-moving valve is combined with a push-moving one-way lock and a buffer control valve, the operation speed of the push-moving oil cylinder is accurately controlled by controlling the opening of the push-moving one-way lock and combining the buffer control valve, the special control damper of the push-moving valve effectively eliminates the impact generated in the switching process of different operation speeds, the buffer control valve can set the operation speed of the push-moving oil cylinder to a required speed, the control process is controllable and adjustable, the control precision is high, the operation speed in the starting, operation and closing processes of the push-moving oil cylinder is accurately controlled, the push-moving oil cylinder realizes a movement process of slow starting, fast pushing in the middle process and slow stopping at the end of pushing, the operation time and operation speed of the push-moving oil cylinder in the process are accurately adjustable, and the problem that the impact force is large in the starting, operation and closing processes of the push-moving oil cylinder of the hydraulic support and the hydraulic support is easily damaged by mechanical impact is effectively solved.

[0044] Figure 1The push-through valve shown in the figure comprises a valve body 1, a control damper 8, a buffer control valve 10, a push-through one-way lock and a plug 13. Figure 3 Figure 4 As shown in the figure, the valve body 1 is provided with a first interface a, a second interface b, a control port c and an adjusting port d.

[0045] Specifically, the valve body 1 is designed with the first interface a, the second interface b and the control port c, and the connection mode of these interfaces is all the quick joint of the mine U-shaped pin type.

[0046] As shown in the figure Figure 1 Figure 5 The push-through one-way lock comprises a valve seat 2, a piston rod 3, a spring 4, a valve cap 7 and a valve seat sealing ring 12; wherein the valve seat sealing ring 12 is arranged on the valve seat 2; the valve seat 2 is connected with the valve body 1 in the form of thread; the valve cap 7 is communicated with the control port c; the spring 4 is arranged between the piston rod 3 and the valve seat 2.

[0047] The first interface a is communicated with the spring cavity of the spring 4 in the push-through one-way lock; when the push-through one-way lock is closed, the second interface b is communicated with the piston rod 3; the liquid passage between the first interface a and the second interface b is communicated with the buffer control valve 10; the control port c is communicated with the control cavity at the bottom of the valve cap 7, and the control port c is provided with the control damper 8; the adjusting port d is communicated with the first interface a and the second interface b, and the adjusting port d is provided with the buffer control valve 10.

[0048] The first interface a is communicated with the spring cavity of the spring 4 in the push-through one-way lock; when the push-through one-way lock is closed, the second interface b is communicated with the piston rod 3; the liquid passage between the first interface a and the second interface b is communicated with the buffer control valve 10; the control port c is communicated with the control cavity at the bottom of the valve cap 7, and the control port c is provided with the control damper 8; the adjusting port d is communicated with the first interface a and the second interface b, and the adjusting port d is provided with the buffer control valve 10.

[0049] Further, the control port c is communicated with the control cavity at the bottom end of the push-through one-way lock valve cap 7, the control port c is designed with the control damper 8, and the liquid of the control port c controls the opening of the push-through one-way lock after passing through the control damper 8.

[0050] Further, the valve body 1 is designed with the adjusting port d, the adjusting port d is communicated with the first interface a and the second interface b, and the adjusting port d is provided with the buffer control valve 10.

[0051] Further, as shown in the figure Figure 1 Figure 7 The valve seat 2 is provided with a spring fixing seat and a valve seat sealing ring 12, and the valve seat 2 is connected with the valve body 1 in the form of thread. In addition, the spring 4 is arranged between the piston rod 3 and the valve seat 2 for resetting the piston rod 3 when the push-through one-way lock is closed.

[0052] ​​​Furthermore, a special control damper 10 is set at control port c. The control medium at control port c is regulated by the control damper 10 to control the flow rate, which buffers the opening and closing of the push-pull check valve and reduces the impact generated during the switching process of the push-pull cylinder at different operating speeds.

[0053] The plug 13 is set on the regulating port d and is used to block the regulating port d.

[0054] The regulating port is sealed with plug 13; removing plug 13 allows replacement of the regulating buffer control valve 10. Specifically, as follows... Figure 1 and Figure 6 As shown, the buffer control valve 10, verified through calculation and simulation, meets the requirements for precise control of the operating speed of different push cylinders. The plug 13 is a threaded connection type and is adapted to a special seal.

[0055] Furthermore, such as Figure 2 As shown, the valve body 1 is designed with 4 mounting holes e for fixing and installing the valve body 1.

[0056] As an embodiment of the present invention, such as Figure 1 As shown, the push-to-lock also includes a valve cap sealing ring 9, which is disposed between the control cavity at the bottom of the valve cap 7 and the second interface b.

[0057] Among them, such as Figure 1 and Figure 9 As shown, the bottom of the valve cap 7 is connected to the control port c on the valve body 1, and the control cavity at the bottom of the valve cap 7 is sealed to the second interface b by the valve cap sealing ring 9. The valve cap 7 is designed with a threaded connection cavity to facilitate the disassembly, assembly, maintenance and replacement of the valve cap 7.

[0058] As an embodiment of the present invention, such as Figure 1 As shown, the push-to-lock also includes a piston rod sealing ring 11, which is disposed between the inner cavity of the valve seat 2 and the first interface a.

[0059] The valve seat 2 inner cavity is sealed to the first interface a by a piston rod sealing ring 11.

[0060] As an embodiment of the present invention, such as Figure 1 , Figure 10- Figure 11 As shown, the push-to-lock also includes: a sealing valve gasket 5 and a retaining ring 6, which are disposed between the valve seat 2 and the valve body 1.

[0061] A sealing gasket 5 and a retaining ring 6 are provided between the valve seat 2 and the valve body 1.

[0062] In the embodiment, when the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the spring force of the spring 4 and the hydraulic pressure of the first interface a, so as to make the push moving one-way lock closed.

[0063] In the embodiment, when the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the spring force of the spring 4 and the hydraulic pressure of the first interface a, so as to make the push moving one-way lock closed.

[0064] Further, the medium at the first interface a flows to the second interface b after being throttled and flow reduced by the buffer control valve 10, and the buffer control valve 10 can be replaced and adjusted by the plug 13 to meet the demand of different running speeds of the push moving cylinder.

[0065] In the embodiment, as shown in Figure 1 and Figure 8 , the piston rod 3 is provided with a sealing taper surface and a drainage channel;

[0066] When the push moving one-way lock is closed, the sealing taper surface is in contact with the sealing valve pad 5;

[0067] When the push moving one-way lock is closed, the drainage channel is in communication with the second interface b and the inner cavity of the valve seat 2; when the push moving one-way lock is opened, the drainage channel is in communication with the first interface a, the second interface b and the inner cavity of the valve seat 2.

[0068] In the embodiment, when the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the spring force of the spring 4 and the hydraulic pressure of the first interface a, so as to make the push moving one-way lock closed.

[0069] In the embodiment, when the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the spring force of the spring 4 and the hydraulic pressure of the first interface a, so as to make the push moving one-way lock closed.

[0070] In the embodiment, when the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the spring force of the spring 4 and the hydraulic pressure of the first interface a, so as to make the push moving one-way lock closed.

[0071] In this embodiment, when the control port c is not connected to the control medium and the first interface a is in an open or liquid return state, the piston rod 3 uses the hydraulic pressure of the second interface b to overcome the spring force of the spring 4 and move downward, so that the sealing cone surface of the piston rod 3 separates from the sealing valve gasket 5, so that the push-to-lock is in a one-way valve state.

[0072] If the control port c is not connected to the control medium, the first port a is in the open or return state. At this time, the pressure fluid at the second port b overcomes the spring force and pushes the piston rod 3 down. The sealing cone surface of the piston rod 3 separates from the sealing valve pad 5. At this time, the push-pull one-way lock is used as a one-way valve and is opened in the positive direction. The large flow of medium flows from the second port b to the first port a, which can realize the rapid return of the push-pull cylinder.

[0073] In a specific embodiment of the present invention, such as Figure 1 The push valve shown includes a valve body 1, a valve seat 2, a piston rod 3, a spring 4, a sealing valve gasket 5, a retaining ring 6, a valve cap 7, a control damper 8, a valve cap sealing ring 9, a buffer control valve 10, a piston rod sealing ring 11, a valve seat sealing ring 12, and a plug 13.

[0074] The push-to-lock mechanism consists of a valve seat 2, a piston rod 3, a spring 4, a sealing valve gasket 5, a retaining ring 6, a valve cap 7, a valve cap sealing ring 9, a piston rod sealing ring 11, and a valve seat sealing ring 12.

[0075] In this embodiment, the valve body 1 is designed with a first interface a, a second interface b and a control port c, and the connection method of the interfaces is a mining U-shaped pin quick connector.

[0076] The first interface a is connected to the spring cavity of the push-one-way lock, the second interface b is connected to the sealing cavity of the piston rod 3 when the push-one-way lock is closed, and the liquid passage between the first interface a and the second interface b is connected through the buffer control valve 10.

[0077] Furthermore, control port c is connected to the control cavity at the bottom of the push-pull one-way lock valve cap 7. Control port c is designed with a control damper 8. The liquid in control port c controls the opening of the push-pull one-way lock after passing through the control damper 8.

[0078] Furthermore, the valve body 1 is designed with an adjustment port d, which is connected to the first interface a and the second interface b. A buffer control valve 10 is installed at the adjustment port d. The adjustment port is sealed with a plug 13. The buffer control valve 10 can be replaced by removing the plug 13. The buffer control valve 10 has been verified through calculation and simulation to meet the precise control of the operating speed of different push cylinders. The plug 13 is a threaded connection and is adapted to a special sealing element.

[0079] like Figure 2 As shown, the valve body 1 has four mounting holes e for fixing and installing the valve body 1. The sectional view of the valve body 1 is shown below.Figure 2 .

[0080] In this embodiment, the push type check valve comprises a valve seat 2, a piston rod 3, a spring 4, a sealing valve pad 5, a retaining ring 6, a bonnet 7, a bonnet sealing ring 9, a piston rod sealing ring 11, and a valve seat O-ring, i.e., a valve seat sealing ring 12.

[0081] The valve seat 2 is designed with a liquid passage, and the area of the liquid passage is adapted to the liquid passage areas of the first interface a and the second interface b through calculation. The liquid passage is in communication with the first interface a on the valve body 1 when the push type check valve is closed, and the liquid passage is in communication with the first interface a and the second interface b on the valve body 1 when the push type check valve is opened. The valve seat 2 is provided with a spring fixing seat and a valve seat sealing ring 12, and the valve seat 2 is connected to the valve body 1 in a threaded form. The sealing valve pad 5 and the retaining ring 6 are arranged between the valve seat 2 and the valve body 1.

[0082] Further, the piston rod 3 is designed with a sealing cone surface, which is in contact with the sealing valve pad when the push type check valve is closed. The piston rod 3 is designed with a drainage passage, which is in communication with the second interface b and the inner cavity of the valve seat 2 when the push type check valve is closed, and the drainage passage is in communication with the first interface a, the second interface b, and the inner cavity of the valve seat 2 when the push type check valve is opened. The inner cavity of the valve seat 2 is sealed from the first interface a by the piston rod sealing ring 11. The spring 4 is arranged between the piston rod 3 and the valve seat 2, and is used for resetting the piston rod 3 when the push type check valve is closed.

[0083] The bottom of the bonnet 7 is in communication with the control port on the valve body 1, and the control cavity at the bottom of the bonnet 7 is sealed from the second interface b by the bonnet sealing ring 9. The bonnet 7 is designed with a threaded connection cavity, which facilitates the disassembly, maintenance, and replacement of the bonnet 7.

[0084] In this embodiment, the push valve at least comprises the following three working states:

[0085] 1) If the control port c is not connected to the control medium, the piston rod 3 is in contact with the sealing valve pad 5 under the combined action of the spring force and the hydraulic pressure of the first interface a, and at this time the push type check valve is in a closed state. The medium at the first interface a flows to the second interface b after being throttled and having its flow rate reduced by the buffer control valve 10. The buffer control valve 10 can be replaced and adjusted by the plug 13 to meet the requirements of different push cylinder operating speeds.

[0086] 2) When the control port c is connected to the control medium, the control medium overcomes the spring force and the hydraulic pressure of the first interface a after passing through the control damper 8, and pushes the bonnet 7 and the piston rod 3 to move downward. The sealing cone surface of the piston rod 3 is separated from the sealing valve pad 5, the first interface a and the second interface b are in communication, and the push type check valve is in an open state. At this time, the high-flow medium flows from the first interface a to the second interface b, realizing the fast pushing action of the push cylinder.

[0087] 3) If the control port c is not connected to the control medium, the first interface a is in an open or return liquid state, at this time the pressure liquid at the second interface b overcomes the spring force, pushes the piston rod 3 to move downward, the piston rod 3 sealing cone surface is separated from the sealing valve pad 5, at this time the push moving one-way lock is used as a one-way valve and is positively opened, and the large flow medium flows from the second interface b to the first interface a, so that the push moving cylinder can quickly return liquid.

[0088] Further, the push valve control port c is provided with a special control damper 8, and the control medium of the control port c is adjusted in control flow through the control damper 8, so as to buffer the opening and closing of the push moving one-way valve and reduce the impact generated in the action switching process of the push moving cylinder at different running speeds.

[0089] The push valve in the application is combined by the push moving one-way lock and the buffer control valve, the opening of the push moving one-way lock is controlled, and the buffer control valve is combined, so as to accurately control the running speed of the push moving cylinder, so that the push moving cylinder realizes the movement process of slow starting, fast pushing in the middle process and slow stopping at the end of pushing, the running time and running speed of the push moving cylinder in the process are accurately adjustable, and the purpose is to solve the problems that the impact force is large in the starting, running and closing process of the push moving cylinder of the coal mine hydraulic support, and the hydraulic support is damaged due to mechanical impact.

[0090] As shown in Figure 12 It is a push moving cylinder speed regulating system, and the system shown in the figure comprises: a push moving cylinder, a first electro-hydraulic control reversing valve, a second electro-hydraulic control reversing valve, a third electro-hydraulic control reversing valve, a control one-way lock, a booster pump, an oil tank and a push valve in the above-mentioned embodiment; wherein the push moving cylinder is provided with a rodless cavity and a rod cavity;

[0091] The push valve regulates the running speed of the push moving cylinder through the control one-way lock; wherein the second interface in the push valve is connected with the rodless cavity or the rod cavity through the control one-way lock, the first interface in the push valve is connected with the second electro-hydraulic control reversing valve, and the control port in the push valve is connected with the third electro-hydraulic control reversing valve;

[0092] The booster pump is connected with the oil tank and is used to provide a stable pressure oil source.

[0093] As an embodiment of the application, the system further comprises a safety valve, which is connected with the booster pump and the oil tank and is used to stabilize the hydraulic pressure.

[0094] In the embodiment, the push moving cylinder speed regulating system comprises a push moving cylinder, a precise push valve, a first electro-hydraulic control reversing valve, a second electro-hydraulic control reversing valve, a third electro-hydraulic control reversing valve, a control one-way lock, a safety valve, a booster pump and an oil tank, and a system principle diagram is shown in Figure 12 .

[0095] Wherein, the push-moving oil cylinder is provided with a rod cavity and a rodless cavity; the push-moving valve is a throttle speed regulating valve combined by a push-moving one-way lock and a buffer control valve, the second interface b is connected with the rod cavity or the rodless cavity of the push-moving oil cylinder through the control one-way lock, the first interface a is connected with the working port of the second electro-hydraulic control reversing valve, and the control port c is connected with the working port of the third electro-hydraulic control reversing valve,

[0096] Further, the control one-way lock is integrated with the push-moving oil cylinder, and the control one-way lock prevents the push-moving oil cylinder from malfunctioning; the first electro-hydraulic control reversing valve, the second electro-hydraulic control reversing valve and the third electro-hydraulic control reversing valve are all two-position three-way electro-hydraulic control reversing valves, which are used to connect or cut off the oil source of the push-moving oil cylinder.

[0097] Further, the safety valve is an overflow valve, which guarantees the required supply pressure of the system and plays a safety protection role; the booster pump provides a stable pressure oil source for the system; and the oil tank is a system liquid storage device, which guarantees that the oil supply source of the system is sufficient and the liquid return collection is smooth.

[0098] In the embodiment, the push-moving oil cylinder speed regulating system is described in the form of a push-moving oil cylinder upside down, the piston rod of the push-moving oil cylinder is connected with a push-pull frame, the piston rod drives the push-pull frame to move forward when the oil cylinder retracts, at this time, the cylinder barrel and the bracket remain stationary, and a push-pull action is performed; the cylinder barrel of the push-moving oil cylinder is connected with the bracket, the bracket is pushed to move forward by the cylinder barrel when the oil cylinder extends, and the piston rod 3 and the push-pull frame connected therewith remain stationary, and a pull frame action is performed. In the embodiment, the second interface b of the push-moving valve is in communication with the rod cavity of the push-moving oil cylinder, and the precise push-moving valve accurately adjusts the running speed of the push-moving oil cylinder during retraction.

[0099] In the embodiment, the push-moving oil cylinder speed regulating system is described in the form of a push-moving oil cylinder upside down, the piston rod of the push-moving oil cylinder is connected with a push-pull frame, the piston rod drives the push-pull frame to move forward when the oil cylinder retracts, at this time, the cylinder barrel and the bracket remain stationary, and a push-pull action is performed; the cylinder barrel of the push-moving oil cylinder is connected with the bracket, the bracket is pushed to move forward by the cylinder barrel when the oil cylinder extends, and the piston rod 3 and the push-pull frame connected therewith remain stationary, and a pull frame action is performed. In the embodiment, the second interface b of the push-moving valve is in communication with the rod cavity of the push-moving oil cylinder, and the precise push-moving valve accurately adjusts the running speed of the push-moving oil cylinder during retraction.

[0100] In the embodiment, the push-moving oil cylinder speed regulating system is described in the form of a push-moving oil cylinder upside down, the piston rod of the push-moving oil cylinder is connected with a push-pull frame, the piston rod drives the push-pull frame to move forward when the oil cylinder retracts, at this time, the cylinder barrel and the bracket remain stationary, and a push-pull action is performed; the cylinder barrel of the push-moving oil cylinder is connected with the bracket, the bracket is pushed to move forward by the cylinder barrel when the oil cylinder extends, and the piston rod 3 and the push-pull frame connected therewith remain stationary, and a pull frame action is performed. In the embodiment, the second interface b of the push-moving valve is in communication with the rod cavity of the push-moving oil cylinder, and the precise push-moving valve accurately adjusts the running speed of the push-moving oil cylinder during retraction.

[0101] In the embodiment, the push cylinder is in the inverted form, and the third electro-hydraulic control reversing valve is closed in time when the push cylinder is about to run to the tail end according to the requirement by monitoring the running displacement or running time of the push cylinder. At this time, the pressure of the control port c gradually decreases until it is close to zero, the valve cover 7 moves upward to the original position under the action of the high pressure liquid at the second interface b, the piston rod 3 moves upward under the combined action of the spring force and the high pressure liquid, contacts and seals with the sealing valve pad 5, the push check valve is closed, and the liquid flows to the rod cavity of the push cylinder after being throttled by the buffer control valve 10 to reduce the flow, so that the push cylinder is slowly retracted, and the pushing and pulling action is slowly stopped.

[0102] In the embodiment, the push cylinder is in the inverted form, and when the first electro-hydraulic control reversing valve is powered on, the high pressure liquid flows to the rodless cavity of the push cylinder through the control check valve, the control check valve is opened in the reverse direction, the piston rod of the push cylinder extends, and the pull frame action is started. At this time, the liquid in the rod cavity of the push cylinder flows to the second interface b through the opened control check valve, the liquid in the rod cavity pushes the piston rod 3 to move downward after overcoming the spring force, the sealing cone surface of the piston rod 3 is separated from the sealing valve pad 5, the push check valve is opened, and the liquid in the rodless cavity of the push cylinder is quickly returned during the pull frame process.

[0103] In the embodiment, the precise push cylinder speed regulation system can be used for the push cylinder in the normal form, and the second interface b of the push valve is communicated with the rodless cavity of the push cylinder. The push valve accurately regulates the running speed of the extension process of the push cylinder, and the implementation method and function are the same as those of the push cylinder in the inverted form.

[0104] The application accurately controls the running speed during the starting, running and closing processes of the push cylinder, so that the push cylinder realizes the movement process of slow starting, fast pushing and pulling in the middle process and slow stopping at the end of the pushing and pulling, the precise push cylinder speed regulation system monitors the stroke or running time to accurately control the running of the push cylinder. The push valve is provided with a specially designed control damper, which effectively eliminates the impact generated during the switching process of different running speeds, and the buffer control valve can adjust the running speed of the push cylinder to the required speed. The control process is controllable and adjustable, the control precision is high, and the problem that the impact force is large during the starting, running and closing processes of the push cylinder of the hydraulic support, and the hydraulic support is easily damaged by mechanical impact is solved.

[0105] The principles and implementation manners of the application are described by using specific embodiments, and the above embodiment is only used to help understand the method and core idea of the application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the application. In summary, the content of the specification should not be understood as a limitation of the application.

Claims

1. A translating valve characterized by, The push-travel valve comprises a valve body, a control damper, a buffer control valve, a push-travel one-way lock and a plug; wherein the valve body is provided with a first interface, a second interface, a control port and an adjusting port; The push-travel one-way lock comprises a valve seat, a piston rod, a spring, a valve cap and a valve seat sealing ring; wherein the valve seat sealing ring is arranged on the valve seat; the valve seat is connected with the valve body in a threaded form; the valve cap is communicated with the control port; the spring is arranged between the piston rod and the valve seat; The first interface is communicated with a spring cavity of the spring in the push-travel one-way lock; when the push-travel one-way lock is closed, the second interface is communicated with a piston rod sealing cavity; a liquid passage between the first interface and the second interface is communicated with the buffer control valve; the control port is communicated with a control cavity at the bottom of the valve cap, and the control port is provided with the control damper; the adjusting port is communicated with the first interface and the second interface, and the adjusting port is provided with the buffer control valve; The plug is arranged on the adjusting port for plugging the adjusting port; The push-travel one-way lock further comprises a sealing valve pad and a retainer ring, which are arranged between the valve seat and the valve body; The piston rod is provided with a sealing cone surface and a drainage passage; when the push-travel one-way lock is closed, the sealing cone surface is in contact with the sealing valve pad; when the push-travel one-way lock is closed, the drainage passage is communicated with the second interface and the inner cavity of the valve seat; when the push-travel one-way lock is opened, the drainage passage is communicated with the first interface, the second interface and the inner cavity of the valve seat.

2. The translating valve of claim 1, wherein, The push-travel one-way lock further comprises a valve cap sealing ring, which is arranged between the control cavity at the bottom of the valve cap and the second interface.

3. The translating valve of claim 1, wherein, The push-travel one-way lock further comprises a piston rod sealing ring, which is arranged between the inner cavity of the valve seat and the first interface.

4. The translating valve of claim 1, wherein, When the control port is not connected with a control medium, the piston rod is in contact with the sealing valve pad under the spring force of the spring and the hydraulic pressure of the first interface, so that the push-travel one-way lock is closed.

5. The translating valve of claim 1, wherein, When the control port is connected with a control medium, the control medium overcomes the spring force of the spring and the hydraulic pressure of the first interface by using the control damper, so as to push the valve cap and the piston rod to move downward, separate the sealing cone surface of the piston rod from the sealing valve pad, and communicate the first interface with the second interface, so that the push-travel one-way lock is opened.

6. The translating valve of claim 1, wherein, When the control port is not connected with a control medium and the first interface is in an open state or a return liquid state, the piston rod overcomes the spring force of the spring by using the hydraulic pressure of the second interface to move downward, so as to separate the sealing cone surface of the piston rod from the sealing valve pad, so that the push-travel one-way lock is in a one-way valve state.

7. A push ram cylinder speed regulation system characterized by, The system comprises a push-travel oil cylinder, a first electro-hydraulic control reversing valve, a second electro-hydraulic control reversing valve, a third electro-hydraulic control reversing valve, a control one-way lock, a booster pump, an oil tank and the push-travel valve according to any one of claims 1-6; wherein the push-travel oil cylinder is provided with a rodless cavity and a rod cavity; The push valve is used for operating speed adjustment of the push cylinder through the control one-way lock; wherein the second interface in the push valve is connected with the rodless chamber or the rod chamber through the control one-way lock, the first interface in the push valve is connected with the second electro-hydraulic control reversing valve, and the control port in the push valve is connected with the third electro-hydraulic control reversing valve. The booster pump is connected with the oil tank and is used for providing a stable pressure oil source.

8. The system of claim 7, wherein, The system further comprises a safety valve connected with the booster pump and the oil tank and used for stabilizing the hydraulic pressure.

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