Manufacturer's direct selling single hydraulic prop

  Brief introduction of single hydraulic prop; The single hydraulic prop is a new environmental protection type of support equipment, which can not only be used for supporting the roof of high-grade common mining and blasting face and the support end of fully mechanized mining face, but also be used as a point pillar or other temporary support

1 scope of application
The single hydraulic prop is applicable to the mining face of inclined coal seams with a coal seam dip angle of less than 25 ° --35 °
The conditions of the coal seam roof and floor are: the backwardness of the roof does not affect the recovery of the prop, the floor should not be too soft, and the depth of the prop pressing into the floor does not deteriorate the integrity of the floor, otherwise the base should be enlarged
When it is used in the blasting mining face with soft coal, protective measures shall be taken for the coating surface of the live column to prevent collapse
When the pillar is used in combination with the wooden top beam or as a point column, the top cover shall be replaced with a column cap to avoid damaging the wooden beam

It fits with the metal hinged roof beam and column, and can be applied to the coal seam with an inclination of 35 deg; Any coal face below
According to different oil supply methods and working media, the pillar is divided into external oil supply type (referred to as “ external injection type ”) And internal oil supply type (referred to as “ internal injection type ”) Two categories; According to the different working stroke of the prop, the prop can be divided into single telescopic prop and double telescopic prop; According to the different materials used, the pillars can be divided into steel pillars and light alloy pillars
Combined with the actual use, it is divided into external injection single hydraulic prop, internal injection single hydraulic prop and other types of prop
2 classified suspension single hydraulic prop suspension single hydraulic prop is a kind of external injection single hydraulic prop, but it has a very significant advantage over external injection single hydraulic prop, that is, DWX Single Hydraulic Prop adopts the plunger suspension technology principle, the suspension force reaches four fifths of the working resistance, and the force on the column is only one fifth
The three-way valve of DWX prop is set on the handle body
During liquid injection, The three-way valve does not rise with the rising of the movable column of the pillar, which is easy to operate, safe and reliable

Double telescopic suspension single hydraulic prop double telescopic suspension single hydraulic prop is a new generation of single support product for working face developed by China University of mining and technology
It is not only a supporting equipment for high-grade mechanized general mining face, but also an end support equipment for fully mechanized mining face
It is applicable to roof support of coal mining face, end roof support of fully mechanized mining face and advance support of roadway excavation
The suspended single hydraulic prop is a kind of external injection single hydraulic prop, but it has another significant advantage over the external injection single hydraulic prop, that is, the DWX Single Hydraulic Prop adopts the plunger suspension technology principle, the suspension force reaches four fifths of the working resistance, and the force on the vertical column is only one fifth
The DWX three-way valve is set on the handle body
During liquid injection, the three-way valve does not rise with the rising of the movable column of the prop, which is convenient to operate, Safe and reliable

Features of double telescopic suspension single hydraulic prop
1
it has strong anti eccentric load capacity and great stability
2
high reliability 3 Light weight 4 The working stroke is 5 High strength 6 Easy to use 7 Low repair and maintenance costs 8 Use neutral water

DN internal injection single hydraulic prop single hydraulic prop is generally divided into external injection single hydraulic prop, internal injection single hydraulic prop, suspension single hydraulic prop and friction prop
The internal injection single hydraulic prop has its own pump and pump
When it is supported, it can be quickly lifted by shaking the handle
When it is lowered, the working fluid will not be discharged, which can better protect the working environment
In addition, it is convenient to use, flexible to manage and simple to equip
At present, the main hydraulic props used are 90mm diameter cylinders, with a total of 12 specifications of internal injection single hydraulic props ranging from 0
6 to 3
15m

In general, the model is dn18-250/80, D refers to single pole, n refers to internal injection type, 18 refers to the maximum height of the pole is 1800mm, 250 refers to the working resistance of the pole is 250kN, and 80 refers to the cylinder diameter of the pole is 80mm

Glass fiber reinforced plastic single hydraulic prop the glass fiber reinforced plastic single hydraulic prop injects liquid into the three-way valve connected with the single hydraulic prop through the hydraulic station, the single hydraulic prop starts to rise to the required height, and the support is completed by using the sealing effect of the sealing ring in the hydraulic prop; In case of lowering, open the unloading valve of the three-way valve, and the hydraulic prop starts to lower to complete the work

Service process of FRP single hydraulic prop:
（1） In the process of column lifting and initial support, insert the liquid injection gun in the pipeline system into the oil injection valve body of the three-way valve, hang the locking sleeve, operate the liquid injection gun, and the high-pressure liquid in the pump station through the liquid injection gun opens the spherical one-way valve in the three-way valve, enters the column, and forces the movable column to rise

（2） During the bearing process, the FRP single hydraulic prop will be in the bearing state after it is supported
With the extension of the supporting time, the load on the prop from the top plate of the working face will increase
When the load borne by the prop exceeds the rated working resistance, the force of the high-pressure liquid in the inner cavity of the prop on the safety valve pad will exceed the pre-set pressing force of the safety valve spring to the hexagonal guide sleeve, and the safety valve spring will be compressed, The safety valve pad and hexagonal guide sleeve move together, the safety valve pad leaves the valve seat, the safety valve is opened, the liquid in the inner cavity overflows, and the movable column shrinks down
Rebalance the roof pressure

（3） During the recovery of FRP single hydraulic prop, insert the unloading handle into the unloading hole of the right valve barrel of the three-way valve, rotate the unloading handle, force the valve sleeve, connecting screw, oil injection valve body and other parts to move axially, compress the unloading valve spring, and the unloading valve gasket leaves the sealing surface of the left valve barrel
The unloading valve is opened, and the working fluid in the inner cavity of the prop is sprayed into the goaf through the left valve barrel
The movable column retracts under the action of its own weight and return spring
Complete pillar recovery

3
Advantages: small size
High erection height
Reliable support
Easy to use and maintain
Low comprehensive cost
4
Local scratch and deformation of fault maintenance hydraulic equipment are common problems of single hydraulic prop, especially the deformation and leakage of piston port, corrosion of downhole hydraulic prop and other problems
Due to the difficulty of equipment disassembly, traditional methods are difficult to solve the above problems on site, mainly replacing new spare parts, but the replacement cycle is long and the cost is high
In view of the latest maintenance methods for single hydraulic prop at present, the   Polymer composites are the main materials, among which   Meijiahua technology system
It has excellent adhesion and good compression resistance, which can not only meet the production and use requirements under the above working conditions, but also the operation process is simple and easy, with no heat effect and unlimited coating thickness
At the same time, the superior oil and corrosion resistance and self-lubricating function of the coating ensure the wear resistance after repair, ensure the normal production of the enterprise, and avoid the aggravation of damage to equipment components