Your Professional Single Hydraulic Prop Supplier!

 

Shandong Changmiaoxin Coal Mine Machinery Co., Ltd. was established on June 20, 2019, as an integrated industrial enterprise specializing in research, design, development, manufacturing, sales, and technological services. The company specializes in the production of lightweight single-piece hydraulic props utilizing advanced materials and modern manufacturing techniques. Its main product lines include various types of single hydraulic props, metal roof beams, idlers, pump stations, and other mine support equipment.

 

 
  • Steel Single Hydraulic Acrow Prop Jack
    Steel Single Hydraulic Acrow Prop Jack is a kind of equipment used for underground support in coal mines, mainly used to support the roof, prevent the roof from collapsing, and ensure the safety of
  • Acrow Prop Hydraulic Jack
    The working principle of Acrow Prop Hydraulic Jack is based on hydraulic transmission, which realizes the lifting and support of the pillar through the flow and control of hydraulic oil.
  • Hydraulic Prop
    Hydraulic prop can basically work in the following scenarios: coal mine face support, roadway support, maintenance and emergency repair operations, thin and medium coal seam mining, and other mining
  • Hydraulic Props in Longwall Workings
    Single Hydraulic Prop has always played an important role in the work of mines, and its advantages include high safety, ease of operation, adaptability, economy and portability.
  • Single Hydraulic Prop
    Single Hydraulic Prop has always played an important role in the work of mines, and its advantages include high safety, ease of operation, adaptability, economy and portability.
  • Mine Hydraulic Propeller
    If you don't know our products, please allow me to briefly introduce to you some simple features of our products in operation, mining hydraulic propellers, simple structure, easy operation, strong
  • Hydraulic Mining Prop
    If you don't know our products, please allow me to briefly introduce our products to help mine work and underground workers, Hydraulic Mining Prop has many benefits, so it has always been used as a
  • Mining Suspension Type Hydraulic Prop
    If you don't know our products, please allow me to briefly introduce our products to help mine work and underground workers, Hydraulic Mining Prop has many benefits, so it has always been used as a
  • Underground DW Outer Injection Single Hydraulic Prop
    Underground DW Outer Injection Single Hydraulic Prop plays an important role in underground coal mine face support, roadway support, maintenance operations and other scenarios, and has a long history
  • Underground Mining Tunnel Hydraulic Supporting Prop
    If your company or your mine happens to need support equipment, then allow me to recommend the Underground Mining Tunnel Hydraulic Supporting Prop.Let me briefly introduce some of the technical
  • Mining Single Suspension Type Hydraulic Supporting Prop
    Our Mining Single Suspension Type Hydraulic Supporting Prop can make many improvements to your mine's bottom line, let me briefly introduce a few of the points below to improve the overall
  • Suspension Hydraulic Prop
    First of all, you are welcome to browse our company's products, and allow me to explain to you the advantages of suspension hydraulic struts in terms of performance characteristics. First of all, our
First 12 Last
 
Why Choose Us
R&D Capabilities
We have dedicated many years to the production of coal mine support products and possess extensive R&D experience. We are the first domestic manufacturer to obtain the safety standard for five-meter single hydraulic props. Furthermore, by 2025, we will assist Dongtai Group in developing the six-meter single hydraulic props it needs.
Customization Services
We provide customized product customization and technical parameter adjustments based on the actual operating conditions of our customers' mines, such as dust concentration and groundwater conditions, to ensure product suitability and reliability in complex geological environments.
Quality Control
All products undergo rigorous quality inspections before shipment to ensure compliance with relevant national standards and our company's quality management system requirements, ensuring stable product performance and long-term reliable operation.

 

Specification

Model project

Max height
(mm)

Min height
(mm)

Working stroke
(mm)

Rated working resistance
(KN)

Weight
(Kg)

Rated working pressure
(Mpa)

Pump station pressure
(Mpa)

Initial support
(KN)

Bore diameter
(mm)

Woek liquid

DW45--250/110X

4500

2520

1980

250

109

28.2

15~
20

132.3~
176.4

110

Emulsioncontaining
1% to2% M10emulsified oil

DW42--250/110X

4200

2360

1840

101

DW40--250/110X

4000

2250

1750

95

DW38--250/110X

3800

2140

1660

89

DW35--300/110X

3500

1980

1520

300

75.5

34

DW31.5--300/110X

3150

1800

1350

67

DW28--350/110X

2800

1620

1180

350

61.1

39.7

DW25--350/110X

2500

1450

1050

57.5

DW22--350/110X

2240

1300

940

52.5

DW20--350/110X

2000

1170

830

48

DW18--350/110X

1800

1055

745

44.5

DW16--350/110X

1600

940

660

41

DW14--350/110X

1400

830

570

37.5

DW12--350/110X

1200

720

480

33

DW10--350/110X

1000

615

385

29.5

DW08--350/110X

800

510

290

25.5

DW06-350/110X

630

420

210

23

DW35-350/110XH

3500

1980

1520

208.6

DW31.5-350/110XH

3150

1800

1350

190

 

Steel Single Hydraulic Acrow Prop Jack

 

Single Hydraulic Prop Advantages

The working fluid of single hydraulic prop is the 5th hydraulic oil, back to the column when the hydraulic oil flow back into the cylinder plunger cavity to form a closed loop.


Does not require pumping and piping systems, auxiliary equipment, low cost.


Mains and pumping stations in the absence of local still use, flexibility, easy management and simple.


Since the working fluid is a closed loop, prop hydraulic oil flowing back when the plunger cavity pillar itself to achieve closed loop hydraulic oil, hydraulic oil consumes very little.


Prop hydraulic system for the closed system, hydraulic oil does not spill, do not pollute the environment, environmental protection, and face the production of small, well maintained face environment, better working conditions.


Prop valve is fully installed in the pillar cavity , the possibility of contamination by outside the small, high reliability.

 

Our Best-Selling Single Hydraulic Prop Types
 

Suspension Single Hydraulic Prop

Suspension is single hydraulic prop is a kind of external fluid for constant resistance type single hydraulic prop, it is a high grade mechanization of conventional mining equipment, is fully mechanized working face end support equipment. It is suitable for the coal mining working face roof support and end roof support, due to its large carrying capacity, the partial load ability, work schedule, using range is wide, so it can be used in thin coal seam, medium thick seam and thick seam working face.

Mining DW Suspension Type Hydraulic Prop

Mining DW suspension type hydraulic prop for seam angle is less than 25 degrees .35 degrees inclined coal seam mining face, the adaptation of the coal seam roof and floor conditions are: roof pillars behind do not affect the recovery of base should not be too soft, prop depth is not pressed into the floor deterioration of the integrity of the base plate, or should increase the base.

 

Basic Principles of Single Hydraulic Prop

The single hydraulic prop is constant resistance prop, working with steel roof bar to make up the safety support system in underground coal mine. The working principle includes plunger rising, initial supporting force, loading and flooding. In the process of operating, plug the injection nozzle, so the high-pressure fluid will push off the steel ball of one-way valve, and flow into the cavity of prop, then the plunger rise.


After the prop makes the roof bar hang to the roof of working surface, the injection nozzle stops working, and the pressure of the cavity of the prop is the same as that of the pump, the initial supporting force is loaded on the roof. With the increase of coal-cutting area and the extension of propping time, the counterforce of working surface loaded on the prop increases.


When the working pressure of top cover exceeds the rated operation load of the prop, the high- pressure fluid in the prop will open the relief valve of three use valve, then the fluid flowing out, the cavity pressure of prop decreases, at the same time the prop declines and the load of the prop diminishes, then the relief valve is closed, the fluid in the cavity stops flowing out. So the prop can keep the rated operation load unchanged, which therefore is called the constant resistance prop.

 

Precautions for Maintenance and Management of Single Hydraulic Prop
 

The single hydraulic prop should be disassembled and connected before work, and the roof should be paid attention to, and the protection work and personal equipment should be done well. Replace the hydraulic components such as the pillar, front beam jack, control valve, etc., first use the single hyadraulic prop to suspension hydraulic prop the top beam before proceeding. Each of the pillar brackets, the control valve and the piping system in the jacks reached, in the case of tension, When repair and replacement are not possible, they must be performed after unloading.

 

In the process of disassembly and maintenance of the suspension hydraulic prop, suitable tools must be used to prevent bumps, especially the smooth surface of each cylinder piston, the valve shaft and sealing surface of each valve part, pipe joints and connecting threads, etc. Prevent damage to avoid increasing the difficulty of maintenance,

 

Assemble and disassemble parts, and mark the mark in the required size and quantity, and put it in place. The removed small parts, such as cotter pins, gaskets, and sealing rings, should be placed in the tool bag to prevent loss.

 

Every cylinder, valve and other hydraulic components on the bracket are usually not allowed to be debugged and disassembled. If no problems are found, they can be used. One group must be replaced for maintenance and sent. In the process of dismantling and single hydraulic prop moving, each cylinder should first shrink to a shorter length to facilitate handling and prevent the surface of the piston rod from being damaged and corroded.

 

Every hose from the liquid inlet, pillars, and valve components of various A replacement sockets must be protected with suitable plugs, and should be stored and handled, and the plugs should not be screwed out to avoid dust and dirt materials. Into the cavity, the influence of the single hyadraulic props hydraulic working system.

 

After-Sales Service Is Solemnly Promised

 

Shandong Changmiaoxin Coal Mining Machinery Co., Ltd. attaches great importance to the after-sales service of products, under the premise of high-quality products, after-sales service is our company's first important commitment.The company has a professional after-sales service team, which region the products are sold to, which region has special after-sales service personnel, and in the sales area to establish offices, so as to help users select and design free of charge, train operators to learn theoretically, master the technical characteristics of the single pillar, and demonstrate ground operation.

 

Packaging and Shipping

Packaging

Fixed packaging

Transportation methods

Road transport, rail transport, sea transport

 

 

Our Certificate

 

productcate-1-1

 

 

FAQ

 

Q: What do you need for a detailed quotation?

A: Please tell me the product model you need, the number of products, the requirements for the surface treatment of the product, etc.

Q: Are you a trading company or a factory?

A: We are a factory, warmly welcome you to visit our factory.

Q: How about your technical level?

A: We focus on the production of coal mine support products for many years, with rich experience in research and development, we are the first manufacturer in the country to obtain the safety standard of five-meter single hydraulic pillar, and Shandong University of Technology jointly develop intelligent mining equipment, at the same time in 2025 we also help Dongtai Group to develop the required six-meter single hydraulic pillar.

Q: Do you have a safety certificate for your products?

A: Our products have a national certification safety certificate.

We're well-known as one of the leading single hydraulic prop manufacturers and suppliers in China. Please feel free to buy high quality single hydraulic prop from our factory. Good service and reasonable price are available.

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