SU825992A1 - Hydraulic prop - Google Patents

Hydraulic prop Download PDF

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Publication number
SU825992A1
SU825992A1 SU792810713A SU2810713A SU825992A1 SU 825992 A1 SU825992 A1 SU 825992A1 SU 792810713 A SU792810713 A SU 792810713A SU 2810713 A SU2810713 A SU 2810713A SU 825992 A1 SU825992 A1 SU 825992A1
Authority
SU
USSR - Soviet Union
Prior art keywords
hydraulic
safety valve
piston
valve
pressure
Prior art date
Application number
SU792810713A
Other languages
Russian (ru)
Inventor
Николай Иванович Павлов
Original Assignee
Pavlov Nikolaj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pavlov Nikolaj filed Critical Pavlov Nikolaj
Priority to SU792810713A priority Critical patent/SU825992A1/en
Application granted granted Critical
Publication of SU825992A1 publication Critical patent/SU825992A1/en

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Description

The invention relates to the mining, business and can be used for mine hydraulic roof supports, installed in the clearing workings of $ when dismantling reservoir deposits.

Known hydraulic rack, including cylinder, rod, pressure and drain line, a safety valve with an outlet channel, hydraulic lock and valve [1].

The disadvantages of takh devices include the fact that the pressure on the lining section along the face is unevenly distributed, therefore, with the constant limiting resistance of the hydro-bearing ’E, it is impossible to actively control the roof. Moreover, the reconfiguration of safety valves is a time-consuming process that requires a lot of working time, which leads *** to a decrease in labor productivity in the extraction of mineral resources.

Closest to the proposed is a hydraulic post, which includes a rod., Pressure and drain lines, a safety valve with inlet and outlet, a hydraulic valve with channels, a hydraulic lock, a hydraulic accumulator with a piston and over-piston cavities and an outlet [21.

2

A disadvantage of this device is the uneven distribution of pressure on the lining sections.

The purpose of the invention is to increase the zone of smooth growth of the carrying capacity of a hydrocall.

To achieve this goal, the hydroaccumulator is made with a drainage hole located in the piston cavity with the possibility of its' periodic connection with the inlet port communicated with the outlet of the safety valve and the hydraulic distributor kayaym.

The drawing shows a schematic diagram of the proposed hydrostatic.

The hydraulic rack contains a rod 1, a piston 2 and a rod 3 cylinder cavity, a safety valve 4, a hydraulic accumulator 5, the casing of which houses the piston 6, the spring 7 and the drain opening 8, the hydraulic lock 9, the hydraulic distributor 10, the drain 11 and the pressure 12 hydraulic main. The output channel of the safety valve 4 and the input channel of the accumulator 5 are connected to the valve 10.

Rack works as follows.

3

825992

four

The working load created by the overlap of the lining acts on the rod 1 of the hydraulic rack and is perceived by the working fluid in the piston cavity 2. With a significant increase in rock pressure on the floor, exceeding the value of the limiting working resistance, the safety valve 4 is activated, the fluid from the piston cavity 2 through the output The channel of the safety valve 4 enters the accumulator 5, acting on its piston. As the fluid accumulates, the piston 6 presses the spring 7, creating an additional pressure on the safety spring.

valve and increasing its resistance to opening.

Thus, after each actuation of the safety valve 4, its resistance increases until the selection of the elastic compliance of the spring 20

7. To protect against the rupture of a closed system, there is a drain hole 8 through which the liquid, when the spring is pushed out to the limit, is discharged to the outside. To drain the liquid from 25 above the piston cavity of the hydraulic accumulator 5, the hydraulic valve Yu is placed in the “drain” position 1 , in which the output channels of the safety valve 4 and hydraulic accumulator 5 are connected to the drain line 11, and the fluid is displaced to the drain line by the action of the spring 7. In all other positions of the valve, the accumulator channels and the safety valve are closed,

Thus, the invention allows to increase the resistance of the support sections with changes in rock pressure, providing a smooth hydraulic compliance. In addition, the proposed rack allows you to provide a variable resistance along the length of the face and the extraction column.

Claims (2)

  1. The invention relates to the mining, business and can be used for mine hydraulic roof supports, installed in the treatment output during the dismantling of reservoir deposits. Hydraulic racks are known, including cylinder, rod, discharge and drain line, safety valve with outlet channel, hydraulic lock and distributor 1. K The disadvantages of the devices include the fact that the pressure on the lining section is unevenly distributed over the length, therefore, with a constant limiting resistance, the hydrophor can not be actively controlled It is a roof. Moreover, the reconfiguration of safety valves is a laborious process that requires a lot of working time, which leads to a decrease in labor productivity in the extraction of minerals. Closest to the proposed one is a hydraulic post, which includes a full pressure and drain master valves, a safety valve with inlet and outlet, a hydraulic valve with channels, a hydraulic lock, a hydraulic accumulator with a piston and rear piston cavities and an outlet 2. The disadvantage of this device is the uneven distribution of pressure on lining sections. The purpose of the invention is to increase the zone of smooth growth of the bearing capacity of a hydrocall. To achieve this goal, the hydroaccumulator is made with a drainage hole located in the piston cavity with the possibility of its periodic connection with the inlet port communicated with the relief valve and the hydraulic distributor kanaym. The drawing shows a schematic diagram of the proposed hydraulic post. The hydraulic strut includes a rod 1, a piston 2 and a rod 3 cylinder cavities, a safety valve 4, a hydraulic accumulator 5, in the case of which a pore 6, a spring 7 and an opening 8 for discharge, a hydraulic lock 9, a hydraulic valve 10, a drain 11 and a pressure 12 hydraulic line are located. Output kangsh safety valve 4 and the input channel. Hydroaccumulator 5 is connected to the valve 10. The rack works as follows. The working load created by the overlap of the lining acts on the rod 1 of the hydraulic rack and is perceived by the working fluid in the piston cavity 2. With a significant increase in rock pressure on the overlap exceeding the limit working resistance, the safety valve 4 is activated, the fluid from the piston cavity 2 through the output channel of the safety valve 4 enters the hydroaccumulator 5, acting on its piston. As the fluid accumulates, the piston 6 presses the spring 7, creating an additional pressure on the spring of the safety valve and increasing its resistance to opening. Thus, after each actuation of the safety valve 4, its resistance increases until the elastic compliance of the spring 7 is selected. To protect against the rupture of the closed system, the drain hole 8 serves and through the cohort fluid, when the spring is pushed, extinguishes the outside. To drain the fluid from the over-piston cavity of the hydroaccumulator 5, the hydraulic distributor 10 is placed in a drainage position, in which the outlets of the safety valve 4 and the hydraulic accumulator 5 are connected to the drain line 11, and the fluid is displaced to the drain line by the action of the spring 7. In all other positions of the hydraulic distributor, the channels of the hydroaccumulator and the safety valve are closed. Thus, the invention allows to increase the resistance of the support sections with changes in rock pressure, providing smooth hydraulic compliance. In addition, the proposed rack allows for variable resistance along the bottom and extraction column. The invention of the hydraulic pillar, including notOK, pressure and drain lines, safety valve with inlet and outlet, hydraulic valve with channels, hydraulic lock, hydraulic accumulator with piston and rear piston cavities and outlet opening, which is designed to increase the bearing capacity of the hydraulic rack, the hydroaccumulator is made with a drainage hole located in the piston cavity with the possibility of its periodic connection with the inlet port communicated with safety valve house and hydraulic valve distributor. Sources of information taken into account in the examination 1. USSR author's certificate number 415378, cl. E 21 D 15/44, 1972.
  2. 2. USSR author's certificate f 461228, cl. E 21 .D 15/44, 1972 (prototype).
    mi
SU792810713A 1979-08-10 1979-08-10 Hydraulic prop SU825992A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU792810713A SU825992A1 (en) 1979-08-10 1979-08-10 Hydraulic prop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU792810713A SU825992A1 (en) 1979-08-10 1979-08-10 Hydraulic prop

Publications (1)

Publication Number Publication Date
SU825992A1 true SU825992A1 (en) 1981-04-30

Family

ID=20846744

Family Applications (1)

Application Number Title Priority Date Filing Date
SU792810713A SU825992A1 (en) 1979-08-10 1979-08-10 Hydraulic prop

Country Status (1)

Country Link
SU (1) SU825992A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5417475A (en) * 1992-08-19 1995-05-23 Sandvik Ab Tool comprised of a holder body and a hard insert and method of using same
US5837071A (en) * 1993-11-03 1998-11-17 Sandvik Ab Diamond coated cutting tool insert and method of making same
CN101550834B (en) 2009-05-07 2011-04-13 山东科技大学 Automatic boost-type setting load guaranteeing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5417475A (en) * 1992-08-19 1995-05-23 Sandvik Ab Tool comprised of a holder body and a hard insert and method of using same
US5837071A (en) * 1993-11-03 1998-11-17 Sandvik Ab Diamond coated cutting tool insert and method of making same
US6051079A (en) * 1993-11-03 2000-04-18 Sandvik Ab Diamond coated cutting tool insert
CN101550834B (en) 2009-05-07 2011-04-13 山东科技大学 Automatic boost-type setting load guaranteeing device

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