What is the function of a hydraulic support valve?

Keep the column at a constant working resistance.

When the pressure of the roof exceeds the working resistance of the bracket, the liquid of the working cavity of the column is released, which not only ensures the constant working resistance, but also plays the role of overload protection.

When the liquid pressure does not reach the rated release pressure, it is normally closed and plays a sealing role.

There are many valves on the bracket, safety valves, check valves, operation valves, I don't know which one you are talking about.

Summary. The hydraulic support is raised to an appropriate height, the top beam of the hydraulic support is in a horizontal position, and various side guard plates are stretched out;

Disassemble the three screws (M12*80) of the hydraulic support control valve and the bracket link;

The control valve is hoisted by a crane and placed on the side of the hydraulic support;

The pipeline linked to the control valve of the hydraulic support of the coal mine is removed, the pipeline is set aside, and the control valve is stacked neatly.

How to unload the valve core of the hydraulic support control valve.

1.The hydraulic support is raised to an appropriate height, the top beam of the hydraulic support is in a horizontal position, and various side guard plates are stretched out; 2.Remove the three screws (M12*80) of the front leakage key of the hydraulic support control valve and the bracket link; 3.

The control valve is hoisted by a crane and placed on the side of the hydraulic support; 4.The pipeline linked to the hydraulic support of the coal mine is removed, the pipeline is set aside to search the sharp edge, and the control valve is placed neatly.

5. Remove the pipelines linked to various jacks and joint racks and place them neatly. 6. Remove all the link heads of the pipeline and collect them separately.

The spool can't be removed.

Dear,**Can't unload it! 

Inside the valve plate. Then you have to find a professional repairman to unload it for you! I can't help you with that, they have special tools.

1.The composition of the hydraulic support: hydraulic cylinder, load-bearing structural parts, pushing device, control system and other auxiliary devices;

2.The support is supplied by an emulsion pumping station installed in the roadway or chamber;

3.When the pressure emulsion enters the column through the control system, the bracket rises to support the top plate at first, and as the roof sinks, the support resistance of the bracket to the roof increases, and the pressure of the locking liquid in the column is limited by the safety valve to achieve constant resistance support;

4.When moving the frame, the column is first lowered and contracted, so that the support is unloaded and separated from the top plate, and then the action is moved to the top of the kilogram of liquid, the conveyor is used to move the frame, and then the supporting support is used as the fulcrum to push the conveyor;

5.The support can also realize various auxiliary actions such as protection, balance, and frame adjustment through various jacks, so as to cooperate with the adoption of Zhengtan coal machine and scraper conveyor to realize the comprehensive mechanization of work, support and transportation;

6.The hydraulic supports are arranged at a certain distance on the working face, most of them move in sequence, and a few also use segmented or alternate movements.

Dear, hello, the control method of the hydraulic support operation valve is as follows:1Open the hydraulic power station:

The first step is to turn on the hydraulic power station and let the hydraulic oil into the system. The pneumatic grinding controls the start and stop of the hydraulic pump, which allows the hydraulic oil to enter or exit the system. 2.

Operation valve control: open the operation valve and send the hydraulic oil to the hydraulic cylinder of the support, so as to realize the lifting of the support, the forward and backward movement of the plexus and other operations. 3.

Control Directional Valve: The directional valve is used to control the direction of movement of the hydraulic cylinder. When it is necessary to lift or move back and forth, it is necessary to select the corresponding directional valve to control the direction of movement of the hydraulic cylinder.

4.Release valve: When the pressure inside the hydraulic cylinder needs to be reduced, the release valve can be opened to release a portion of the hydraulic oil.

This avoids excessive hydraulic pressure. In a word, the correct use of operating valves and various controllers is the key to mastering the skills and methods of hydraulic support operation. Paying attention to safety regulations and maintaining and overhauling equipment at the right time can extend its life and ensure productivity.

Summary. Pro, the control methods of the hydraulic support operation valve are: 1. Control by switch:

The lifting of the hydraulic support is controlled by operating the switch, which is often used in the case of low positioning accuracy; 2. Single-node positioning control: In addition to the single-point control of the switch, the lifting of the bracket can be controlled according to different node positions, such as the lifting of the workbench; 3. Flexibility control: It is used to control the flexibility, average degree and jitter of the bracket lifting, which can achieve high precision; 4. Constant speed control

Use external sensors or hardware modules to achieve constant speed control to control the lifting speed of the bracket; 5. Continuous positioning control: modern control technology can make the stent move to any point, effectively improving the positioning accuracy of the stent.

Pro, the control methods of the hydraulic support operation valve are: 1. Control by switch: control the lifting of the hydraulic support by operating the switch, which is often used in the case of low positioning accuracy; 2. Single-node positioning control

In addition to the single-point control of the switch, the lifting of the bracket can be controlled according to different node positions, such as the lifting of the workbench; 3. Flexibility control: It is used to control the flexibility, average degree and jitter of the bracket lifting, which can achieve high precision; 4. Constant speed control: the use of external sensors, or hardware modules to achieve dust-resistant constant speed control, used to control the Zhichang Zen frame to imitate the descent speed; 5. Continuous positioning control

Modern control technology can make the stent move to any point, effectively improving the positioning accuracy of the stent.

The hydraulic support control valve is also known as Shizhao and: the reversing valve is the direction control valve in the hydraulic system, and it is a liquid distribution search valve. It can distribute high-pressure liquid to the required parts, and complete actions such as lifting the column, lowering the column, pushing and sliding, and moving the frame.

The hydraulic support is a structure used to control the mine pressure of the coal mining face. The ore pressure at the mining face acts on the hydraulic support in the form of external load. In the mechanical system of the interaction between the hydraulic support and the surrounding rock of the mining face, if the resultant force of each supporting part of the hydraulic support and the external load force of the roof acting on the hydraulic support are exactly the same straight line, the hydraulic support is very suitable for the surrounding rock of the mining face.

The hydraulic support is an important part of the fully mechanized mining equipment in Jeongju. It reliably and effectively supports and controls the roof of the face, isolates the goaf, prevents gangue from entering the face and propels the conveyor. It is used in conjunction with the shearer to realize the comprehensive mechanization of coal mining in Shandong, solve the contradiction that the roof management of the mechanical Shenhua coal mining work lags behind the coal mining work, further improve and enhance the efficiency of coal mining and transportation equipment, reduce the labor intensity of coal miners, and maximize the life safety of coal miners.

shenhua09

The hydraulic support is composed of 4 parts: load-bearing members, actuators, control and control elements, and auxiliary devices.

Load-bearing components: top beams, cover beams, bases, etc. The roof beam is in direct contact with the roof and bears the pressure of the rock on the roof of the working face; Cover beams, components that block falling rocks from entering the working face and withstand their pressure, thereby bearing the horizontal thrust of the roof; The base is in contact with the bottom plate, transmitting and bearing the pressure of the top plate.

Actuators: various jacks and columns. The column is a cylinder that is supported between the top beam and the base or indirectly bears the load of the roof, and it is the main dynamic habit element of the hydraulic support, and its structural strength and form determine the supporting force and the support range of the support.

The jack refers to a variety of cylinders (except columns), which complete various protective actions such as pushing and adjusting.

Control and control components: control valves for various cylinders such as control valves and isolation valves. The control valve is a valve used to manipulate various actions of the support, and is the command element of the hydraulic support.

Auxiliary devices: In addition to the above three components, the rest are auxiliary devices. Including pushing device, replication device, guard and force, anti-falling (sliding) device, spray lighting and so on.

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