Hydraulic control valve, device and system

Abstract

The hydraulic control valve is used for a switch hydraulic system and comprises a throttling valve, a first control valve, a second control valve and a one-way throttling valve, a liquid inlet of the first control valve is connected with a first oil port of the switch hydraulic system through the throttling valve, and a liquid outlet of the second control valve is connected with a second oil port of the switch hydraulic system through the one-way throttling valve. A liquid inlet of the first control valve is communicated with a first oil port of the exchanger hydraulic system, a liquid inlet of the second control valve is communicated with a second oil port of the exchanger hydraulic system, a liquid outlet of the first control valve and a liquid outlet of the second control valve are connected to a liquid inlet of the one-way throttle valve in parallel, and a liquid outlet of the one-way throttle valve is connected with a third oil port of the exchanger hydraulic system. A three-position three-way structure is formed through the first control valve and the second control valve, the requirement for opening, closing or pressure maintaining of the exchanger hydraulic system can be met at the same time, the requirement for reliable closing of a gas device corresponding to the exchanger hydraulic system in an emergency state is met, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control, and particularly to a hydraulic control valve, device and system. Background Art

[0002] The hydraulic exchanger drives the pull bar tied to its end by the movement of the oil cylinder piston rod, and the pull bar then pulls each valve to change direction according to a certain program and time, completing the timed exchange of gas, waste gas and air, and realizing the heating function of coke oven gas and blast furnace gas. It is a special equipment for coke ovens. The exchange oil cylinder generally includes a gas oil cylinder, an air oil cylinder, an exhaust gas oil cylinder, etc. The cylinder structure is a single-acting cylinder, and a counterweight traction is provided on the rodless cavity side of the cylinder.

[0003] Most of the hydraulic system controls of various coke oven exchanger gas cylinders on the market adopt a two-position four-way valve control. When working in one position, the oil cylinder piston rod retracts and the device opens; when working in the other position, the counterweight of the oil cylinder pulls out the piston rod and the device closes. During the exchange process, if the coke oven gas cylinder needs to remain open and stationary, the hydraulic system needs to continuously provide power to overcome the pulling force of the counterweight. This will cause the hydraulic system to be in a high-pressure working state for a long time, and the control valve parts will also be in an open state for a long time. The leakage and heat generation of the entire system are relatively large. Summary of the Invention

[0004] Based on this, in view of the problem that the existing hydraulic control structure requires continuous power output and there are problems of hydraulic fluid leakage and heat generation of the hydraulic control structure, a hydraulic control valve, device and system are proposed. The hydraulic control valve, device and system are composed of two control valves, providing a new hydraulic control method to reduce the problems of hydraulic system leakage and heat generation.

[0005] In a first aspect, a hydraulic control valve is provided. The control valve is used for the hydraulic system of the exchanger. The hydraulic control valve includes:

[0006] A throttle valve, a first control valve, a second control valve and a one-way throttle valve;

[0007] Wherein, the liquid inlet of the first control valve is connected to the first oil port of the hydraulic system of the exchanger through the throttle valve, the liquid inlet of the second control valve is communicated with the second oil port of the hydraulic system of the exchanger, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the hydraulic system of the exchanger.

[0008] Optionally, both the first control valve and the second control valve adopt cartridge-type electromagnetic ball valves.

[0009] On the other hand, the present application provides a hydraulic control device for a switch hydraulic system, and the hydraulic control device includes:

[0010] a valve body, a throttle valve, a first control valve, a second control valve, and a one-way throttle valve;

[0011] Wherein, the valve body is a cuboid shell, and a first through hole and a second through hole are provided on the surface of the cuboid shell. The first control valve is fixed in the first through hole by a threaded structure, and the second control valve is fixed in the second through hole by a threaded structure. A third through hole and a fourth through hole are also provided on the surface of the cuboid shell. The throttle valve is fixed in the third through hole, and the one-way throttle valve is fixed in the fourth through hole;

[0012] Wherein, the liquid inlet of the first control valve is connected to the first oil port of the switch hydraulic system through the throttle valve, the liquid inlet of the second control valve communicates with the second oil port of the switch hydraulic system, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the switch hydraulic system.

[0013] Optionally, the first through hole, the second through hole, the third through hole, and the fourth through hole are provided on the same surface of the valve body.

[0014] Optionally, the first through hole, the second through hole, the third through hole, and the fourth through hole form a "cross" structure on the same surface of the valve body. The centers of the first through hole and the second through hole are connected to form one stroke of the "cross" structure, and the centers of the third through hole and the fourth through hole are connected to form the other stroke of the "cross" structure.

[0015] Optionally, the liquid inlet of the first control valve is connected to the first port of the throttle valve through a first liquid guide pipe provided inside the valve body, the second port of the throttle valve is connected to the first oil port of the switch hydraulic system through a second liquid guide pipe provided inside the valve body, the liquid inlet of the second control valve communicates with the second oil port of the switch hydraulic system through a third liquid guide pipe provided inside the valve body, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve through a Y-shaped liquid guide pipe, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the switch hydraulic system through a fourth liquid guide pipe provided inside the valve body.

[0016] In a third aspect, the present application provides a hydraulic control system for a switch hydraulic system, and the hydraulic control system includes:

[0017] Power supply unit, control unit, valve body, throttle valve, first control valve, second control valve and one-way throttle valve;

[0018] Among them, the valve body is a cuboid shell, and a first through hole and a second through hole are arranged on the surface of the cuboid shell. The first control valve is fixed in the first through hole through a threaded structure, and the second control valve is fixed in the second through hole through a threaded structure. A third through hole and a fourth through hole are also arranged on the surface of the cuboid shell. The throttle valve is fixed in the third through hole, and the one-way throttle valve is fixed in the fourth through hole;

[0019] Among them, the liquid inlet of the first control valve is connected to the first oil port of the switch hydraulic system through the throttle valve, the liquid inlet of the second control valve is communicated with the second oil port of the switch hydraulic system, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the switch hydraulic system;

[0020] Both the first control valve and the second control valve are electromagnetic control valves, and the power supply unit supplies power to the first control valve and the second control valve through the control unit.

[0021] This application uses the first control valve and the second control valve to construct a hydraulic control valve, device and system, provides a new hydraulic control method, and reselects the function form of the control valve parts, which can not only realize the normal retraction function of the switch hydraulic system, but also realize the pressure holding state of the oil cylinder of the switch hydraulic system after retraction, without continuous power output, and reduces the problems of hydraulic system leakage and heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Among them:

[0024] Figure 1 It is a schematic structural diagram of a hydraulic control valve in an embodiment;

[0025] Figure 2 It is a schematic principle diagram of a hydraulic control valve in an embodiment;

[0026] Figure 3 It is a front view of a hydraulic control device in an embodiment;

[0027] Figure 4 The top view of the hydraulic control device in one embodiment;

[0028] Figure 5 The structural schematic diagram of the valve body in the hydraulic control device in one embodiment;

[0029] Figure 6 The structural schematic diagram of the hydraulic control system in one embodiment;

[0030] Throttle valve 10, first control valve 20, second control valve 30, one-way throttle valve 40, valve body 50, first through hole 501, second through hole 502, third through hole 503, fourth through hole 504, power supply unit 60, control unit 70. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The embodiments of the present invention provide a hydraulic control valve, as Figure 1 shown, the control valve is used for the hydraulic system of the switch, and the hydraulic control valve includes:

[0033] Throttle valve 10, first control valve 20, second control valve 30 and one-way throttle valve 40;

[0034] Wherein, the liquid inlet of the first control valve 20 is connected to the first oil port (P) of the hydraulic system of the switch through the throttle valve 10, the liquid inlet of the second control valve 30 communicates with the second oil port (T) of the hydraulic system of the switch, the liquid outlet of the first control valve 20 and the liquid outlet of the second control valve 30 are connected in parallel to the liquid inlet of the one-way throttle valve 40, and the liquid outlet of the one-way throttle valve 40 is connected to the third oil port (B) of the hydraulic system of the switch.

[0035] Exemplarily, as Figure 2As shown in the figure, the liquid inlet of the first control valve 20 is connected to the first oil port (P) of the hydraulic system of the switchboard through the throttle valve 10. The liquid inlet of the second control valve 30 is communicated with the second oil port (T) of the hydraulic system of the switchboard. When the left electromagnetic magnets a and b are energized, the first control valve 20 works in the left position, and the first oil port (P) communicates with the third oil port (B). The pressure oil enters the rod chamber side of the coke oven gas cylinder of the hydraulic system of the switchboard, the piston rod of the cylinder retracts, and the gas device opens. When the right electromagnetic magnet b is energized, the first oil port (P), the second oil port (T), and the third oil port (B) are all disconnected and in a pressure-holding state. The coke oven gas cylinder of the hydraulic system of the switchboard remains in its original position without the need for the system to continuously provide power. When all the electromagnetic magnets on both sides are de-energized, the second oil port (T) communicates with the third oil port (B), and the piston rod of the coke oven gas cylinder of the hydraulic system of the switchboard is pulled out by the counterweight, and the gas device closes.

[0036] In the event of equipment failure or power outage, all the electromagnetic magnets of the hydraulic control valve suddenly lose power. The neutral position function of the hydraulic control valve ensures that the piston rod of the coke oven gas cylinder of the hydraulic system of the switchboard is smoothly pulled out by the counterweight, and the gas device closes, meeting the safety requirements of the coking process in the emergency state.

[0037] Using the first control valve and the second control valve to construct a hydraulic control valve, device and system, providing a new hydraulic control method and reselecting the function form of the control valve components can not only realize the normal retraction function of the hydraulic system of the switchboard, but also realize the pressure-holding state of the oil cylinder of the hydraulic system of the switchboard after retraction, without continuous power output, reducing the problems of leakage and heat generation of the hydraulic system.

[0038] In a possible implementation manner, both the first control valve 20 and the second control valve 30 adopt cartridge-type solenoid ball valves.

[0039] Exemplarily, since the internal leakage of the cartridge-type solenoid ball valve is very small, it can effectively reduce the leakage of the hydraulic control valve.

[0040] On the other hand, the present application provides a hydraulic control device, as Figure 3 and Figure 4 shown. The device is used for the hydraulic system of the switchboard. The hydraulic control device includes:

[0041] A valve body 50, a throttle valve 10, a first control valve 20, a second control valve 30, and a one-way throttle valve 40;

[0042] Among them, the valve body 50 is a cuboid shell. A first through hole 501 and a second through hole 502 are provided on the surface of the cuboid shell. The first control valve 20 is fixed in the first through hole 501 through a threaded structure. The second control valve 30 is fixed in the second through hole 502 through a threaded structure. A third through hole 503 and a fourth through hole 504 are also provided on the surface of the cuboid shell. The throttle valve 10 is fixed in the third through hole 503. The one-way throttle valve 40 is fixed in the fourth through hole 504;

[0043] Among them, the liquid inlet of the first control valve 20 is connected to the first oil port (P) of the switch hydraulic system through the throttle valve 10. The liquid inlet of the second control valve 30 communicates with the second oil port (T) of the switch hydraulic system. The liquid outlet of the first control valve 20 and the liquid outlet of the second control valve 30 are connected in parallel to the liquid inlet of the one-way throttle valve 40. The liquid outlet of the one-way throttle valve 40 is connected to the third oil port (B) of the switch hydraulic system. The throttle valve 10 is arranged between the first control valve 20 and the second control valve 30. Specifically, the liquid inlet of the first control valve 20 is connected to the first port of the throttle valve 10 through a first liquid guide pipe arranged inside the valve body 50. The second port of the throttle valve 10 is connected to the first oil port (P) of the switch hydraulic system through a second liquid guide pipe arranged inside the valve body 50. The liquid inlet of the second control valve 30 communicates with the second oil port (T) of the switch hydraulic system through a third liquid guide pipe arranged inside the valve body 50. The liquid outlet of the first control valve 20 and the liquid outlet of the second control valve 30 are connected in parallel to the liquid inlet of the one-way throttle valve 40 through a Y-shaped liquid guide pipe. The liquid outlet of the one-way throttle valve 40 is connected to the third oil port (B) of the switch hydraulic system through a fourth liquid guide pipe arranged inside the valve body 50.

[0044] In a possible implementation manner, the first through hole 501, the second through hole 502, the third through hole 503, and the fourth through hole 504 are arranged on the same surface of the valve body 50.

[0045] Exemplarily, by arranging the first through hole 501, the second through hole 502, the third through hole 503, and the fourth through hole 504 on the same surface of the valve body 50, and further arranging the throttle valve 10, the first control valve 20, the second control valve 30, and the one-way throttle valve 40 on the same surface of the valve body 50, the volume of the hydraulic control device can be reasonably planned, which is convenient for the installation and use of the hydraulic control device.

[0046] In a possible implementation manner, such as Figure 5As shown, the first through-hole 501, the second through-hole 502, the third through-hole 503, and the fourth through-hole 504 form a "cross" structure on the same surface of the valve body. The connection of the centers of the first through-hole 501 and the second through-hole 502 is one stroke of the "cross" structure, and the connection of the centers of the third through-hole 503 and the fourth through-hole 504 is the other stroke of the "cross" structure.

[0047] In a possible implementation manner, the present application provides a hydraulic control system, as Figure 6 shown, for the hydraulic system of a switch. The hydraulic control system includes:

[0048] a power supply unit 60, a control unit 70, a valve body 50, a throttle valve 10, a first control valve 20, a second control valve 30, and a one-way throttle valve 40;

[0049] Among them, the valve body 50 is a rectangular parallelepiped housing. A first through-hole 501 and a second through-hole 502 are provided on the surface of the rectangular parallelepiped housing. The first control valve 20 is fixed in the first through-hole 501 through a threaded structure, and the second control valve 30 is fixed in the second through-hole 502 through a threaded structure. A third through-hole 503 and a fourth through-hole 504 are also provided on the surface of the rectangular parallelepiped housing. The throttle valve 10 is fixed in the third through-hole 503, and the one-way throttle valve 40 is fixed in the fourth through-hole 504;

[0050] Among them, the liquid inlet of the first control valve 20 is connected to the first oil port (P) of the switch hydraulic system through the throttle valve 10. The liquid inlet of the second control valve 30 communicates with the second oil port (T) of the switch hydraulic system. The liquid outlet of the first control valve 20 and the liquid outlet of the second control valve 30 are connected in parallel to the liquid inlet of the one-way throttle valve 40. The liquid outlet of the one-way throttle valve 40 is connected to the third oil port (B) of the switch hydraulic system;

[0051] Both the first control valve 20 and the second control valve 30 are electromagnetic control valves. The power supply unit 60 supplies power to the first control valve 20 and the second control valve 30 through the control unit 70.

[0052] Exemplarily, when both the first control valve 20 and the second control valve 30 are electromagnetic control valves and the switch hydraulic system operates periodically in actual application, the control unit 70 controls the power supply unit 60 to supply power to the first control valve 20 and the second control valve 30 periodically, thereby controlling the on-off of the first oil port (P), the second oil port (T), and the third oil port (B) of the switch hydraulic system.

[0053] Exemplarily, the coke oven gas exchange cycle (the operation cycle of the hydraulic system of the exchanger) is 57 s. After the exchange cycle ends, the gas cylinder (the hydraulic system of the exchanger) needs to maintain pressure for about 30 min, and then the next exchange cycle starts. The high-pressure working time of the existing hydraulic system in one exchange cycle is 30 min + 57 s = 1857 s. Since the hydraulic control valve, device and system described in the present application do not require energy in the pressure-holding state, the working time of the hydraulic control valve, device and system described in the present application in the same cycle is 57 s. The working time of the hydraulic control valve, device and system described in the present application is 57 / 1857 = 0.03 times that of the existing hydraulic system. Therefore, the heat generation of the hydraulic control valve, device and system described in the present application will also be 0.03 times that of the existing hydraulic system, and the heat generation is greatly reduced.

[0054] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In practical applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention and should all be included in the protection scope of the present invention.

Claims

1. A hydraulic control valve, characterized in that, The control valve is used in the hydraulic system of a switch. The hydraulic control valve includes: a throttle valve, a first control valve, a second control valve, and a one-way throttle valve; Wherein, the liquid inlet of the first control valve is connected to the first oil port of the hydraulic system of the switch through the throttle valve, the liquid inlet of the second control valve communicates with the second oil port of the hydraulic system of the switch, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the hydraulic system of the switch.

2. The hydraulic control valve according to claim 1, characterized in that, Both the first control valve and the second control valve adopt cartridge-type electromagnetic ball valves.

3. A hydraulic control device, characterized in that, The device is used in the hydraulic system of a switch. The hydraulic control device includes: a valve body, a throttle valve, a first control valve, a second control valve, and a one-way throttle valve; Wherein, the valve body is a rectangular parallelepiped shell. A first through hole and a second through hole are provided on the surface of the rectangular parallelepiped shell. The first control valve is fixed in the first through hole by a threaded structure, the second control valve is fixed in the second through hole by a threaded structure. A third through hole and a fourth through hole are also provided on the surface of the rectangular parallelepiped shell. The throttle valve is fixed in the third through hole, and the one-way throttle valve is fixed in the fourth through hole; Wherein, the liquid inlet of the first control valve is connected to the first oil port of the hydraulic system of the switch through the throttle valve, the liquid inlet of the second control valve communicates with the second oil port of the hydraulic system of the switch, the liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve, and the liquid outlet of the one-way throttle valve is connected to the third oil port of the hydraulic system of the switch.

4. The hydraulic control device according to claim 3, characterized in that The first through hole, the second through hole, the third through hole, and the fourth through hole are provided on the same surface of the valve body.

5. The hydraulic control device according to claim 4, wherein The first through hole, the second through hole, the third through hole, and the fourth through hole form a "cross" structure on the same surface of the valve body. The connection of the centers of the first through hole and the second through hole is one stroke of the "cross" structure, and the connection of the centers of the third through hole and the fourth through hole is the other stroke of the "cross" structure.

6. The hydraulic control device according to claim 3, wherein The liquid inlet of the first control valve is connected to the first port of the throttle valve through a first liquid guide pipe arranged inside the valve body. The second port of the throttle valve is connected to the first oil port of the hydraulic system of the switch through a second liquid guide pipe arranged inside the valve body. The liquid inlet of the second control valve communicates with the second oil port of the hydraulic system of the switch through a third liquid guide pipe arranged inside the valve body. The liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve through a Y-shaped liquid guide pipe. The liquid outlet of the one-way throttle valve is connected to the third oil port of the hydraulic system of the switch through a fourth liquid guide pipe arranged inside the valve body.

7. A hydraulic control system, characterized in that, For the hydraulic system of a switch, the hydraulic control system includes: a power supply unit, a control unit, a valve body, a throttle valve, a first control valve, a second control valve, and a one-way throttle valve; Among them, the valve body is a cuboid shell, and a first through-hole and a second through-hole are provided on the surface of the cuboid shell. The first control valve is fixed in the first through-hole through a threaded structure, and the second control valve is fixed in the second through-hole through a threaded structure. A third through-hole and a fourth through-hole are also provided on the surface of the cuboid shell. The throttle valve is fixed in the third through-hole, and the one-way throttle valve is fixed in the fourth through-hole; Among them, the liquid inlet of the first control valve is connected to the first oil port of the switch hydraulic system through the throttle valve. The liquid inlet of the second control valve is communicated with the second oil port of the switch hydraulic system. The liquid outlet of the first control valve and the liquid outlet of the second control valve are connected in parallel to the liquid inlet of the one-way throttle valve. The liquid outlet of the one-way throttle valve is connected to the third oil port of the switch hydraulic system; Both the first control valve and the second control valve are electromagnetic control valves, and the power supply unit supplies power to the first control valve and the second control valve through the control unit.

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