Mining mechanical liquid pressurizing and overlying mechanism

Abstract

The utility model discloses a mining mechanical liquid pressurizing and overlying mechanism, and mainly relates to the technical field of hydraulic supports. Comprising a reversing valve set and a plurality of hydraulic jacks connected in sequence, a lower cavity of the first hydraulic jack is communicated with one output end of the reversing valve set, an upper cavity of the last hydraulic jack is communicated with hydraulic equipment needing to be pressurized, and an upper cavity of the Nth hydraulic jack is communicated with a lower cavity of the (N + 1) th hydraulic jack. N is a natural number greater than zero; according to the utility model, a liquid pressurization and overlying technology is adopted, so that the mine production requirements can be met and improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic supports, and particularly relates to a mechanical liquid boosting and superposing mechanism for mines. Background Art

[0002] A hydraulic support is a structure for controlling the mine pressure in a coal mining face. The high water-based emulsion provided by a hydraulic pump station is used to achieve the transfer and conversion of energy through pipelines, hydraulic control components and actuators, so as to achieve the purposes of roof support, lifting the support, lowering the support, moving the support and pushing the mining and conveying equipment in the working face. Among them, the size of the pressure of the liquid supply pump station directly affects the performance of the hydraulic support. With the increase of the pressure of the liquid supply pump station, hydraulic components with characteristics such as large flow rate, large channel and high pressure need to be used in the working face. The emulsion pumps used in the pump stations of coal mining faces are generally horizontal piston pumps, which have the disadvantages of large investment, high energy consumption, high maintenance cost, high noise and large volume. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems existing in the prior art, and provide a mechanical liquid boosting and superposing mechanism for mines. By adopting the liquid boosting and superposing technology, it can meet and improve the production requirements of mines.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] A mechanical liquid boosting and superposing mechanism for mines includes a reversing valve group and a number of hydraulic jacks connected in sequence. The lower cavity of the first hydraulic jack is communicated with one of the output ends of the reversing valve group, the upper cavity of the last hydraulic jack is communicated with the hydraulic equipment to be boosted, and the upper cavity of the Nth hydraulic jack is communicated with the lower cavity of the (N + 1)th hydraulic jack, where N is a natural number greater than zero.

[0006] Preferably, a first hydraulic lock is provided on the pipeline between the upper cavity of each hydraulic jack and the reversing valve group.

[0007] Preferably, a first stop valve is provided on the pipeline between two adjacent hydraulic jacks.

[0008] Preferably, two first hydraulic locks are sequentially provided on the pipeline between the upper cavity of the first hydraulic jack and the reversing valve group, and the first stop valve connected to the first hydraulic jack is located between the two first hydraulic locks.

[0009] Preferably, a second hydraulic lock, a pressure gauge and a second stop valve are sequentially provided on the pipeline between the upper cavity of the last hydraulic jack and the hydraulic equipment to be boosted.

[0010] Preferably, the reversing valve group is a three-position four-way reversing valve group, and the number of hydraulic jacks is two.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The present utility model adopts liquid pressurization and superimposed pressure technology, which can realize liquid pressurization and superimposed pressure. On the basis of improving the safety of pressurization operations, it can optimize the production links of coal mining operations to the greatest extent. On the basis of reducing the labor intensity of operators, it can effectively improve the economic benefits of coal mining operations. Description of the Drawings

[0013] Figure 1 is the structural schematic diagram of the present utility model.

[0014] Reference numerals in the drawings: 1, reversing valve group; 2, hydraulic jack; 3, hydraulic equipment; 4, first hydraulic lock; 5, first stop valve; 6, second hydraulic lock; 7, pressure gauge; 8, second stop valve. Detailed Embodiments

[0015] The following further elaborates the present utility model in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by this application.

[0016] Embodiment: The present utility model relates to a mine-used mechanical liquid pressurization and superimposed pressure mechanism, which includes a reversing valve group 1 and a plurality of hydraulic jacks 2 connected in sequence. The lower cavity of the first hydraulic jack 2 is communicated with one of the output ends of the reversing valve group 1, the upper cavity of the last hydraulic jack 2 is communicated with the hydraulic equipment 3 to be pressurized, and the upper cavity of the Nth hydraulic jack 2 is communicated with the lower cavity of the (N + 1)th hydraulic jack 2, where N is a natural number greater than zero.

[0017] At Figure 1 Taking two hydraulic jacks 2 as an example for illustration, the reversing valve group 1 is a three-position four-way reversing valve group, and the number of hydraulic jacks 2 is two.

[0018] A first hydraulic lock 4 is provided on the pipeline between the upper cavity of each hydraulic jack 2 and the reversing valve group 1.

[0019] A first stop valve 5 is provided on the pipeline between two adjacent hydraulic jacks 2.

[0020] Two first hydraulic locks 4 are sequentially provided on the pipeline between the upper cavity of the first hydraulic jack 2 and the reversing valve group 1, and the first stop valve 5 connected to the first hydraulic jack 2 is located between the two first hydraulic locks 4.

[0021] A second hydraulic lock 6, a pressure gauge 7, and a second stop valve 8 are successively provided on the pipeline between the upper chamber of the last hydraulic jack 2 and the hydraulic equipment 3 to be pressurized.

[0022] The utility model utilizes the principle that liquid can transmit pressure, converts the pressure difference generated inside the lower chamber and the upper chamber of a common hydraulic jack into the pressure difference of the input and output liquids, and utilizes the principle of the pressure multiple difference of the jack. Liquids with the same pressure are input from the lower chamber of the jack, and the pressure borne by the upper chamber can be increased to a multiple of the area ratio.

[0023] The calculation formula is as follows:

[0024] F (upper chamber) = P (upper pressure) × S (upper chamber)

[0025] F (lower chamber) = P (lower pressure) × S (lower chamber)

[0026] If F (upper chamber) = F (lower chamber), then P (upper pressure) / P (lower pressure) = S (lower chamber) / S (upper chamber), and the pressure is inversely proportional to the acting area.

[0027] Then the output pressure of the upper chamber is S (lower chamber) / S (upper chamber) times the input pressure of the lower chamber.

[0028] If the output liquid pressure of the first hydraulic jack is used as the input liquid pressure of the second hydraulic jack, then the output pressure of the second hydraulic jack is [S (lower chamber) / S (upper chamber)]².

[0029] The utility model can optimize the production link of coal mining operations to the greatest extent on the basis of improving the safety of boosting operations, and can effectively improve the economic benefits of coal mining operations on the basis of reducing the labor intensity of operators.

Claims

1. A mechanical liquid pressurizing and superimposing mechanism for mining, characterized in that: It includes a reversing valve group and a number of hydraulic jacks connected in sequence. The lower cavity of the first hydraulic jack is communicated with one of the output ends of the reversing valve group. The upper cavity of the last hydraulic jack is communicated with the hydraulic equipment to be pressurized. The upper cavity of the Nth hydraulic jack is communicated with the lower cavity of the (N + 1)th hydraulic jack, where N is a natural number greater than zero.

2. A mining mechanical liquid boosting and superimposed pressing mechanism according to claim 1, characterized in that: A first hydraulic lock is provided on the pipeline between the upper cavity of each of the hydraulic jacks and the reversing valve group.

3. The mechanical liquid pressurization and superposition mechanism for mining according to claim 2, wherein: A first stop valve is provided on the pipeline between two adjacent hydraulic jacks.

4. A mine-used mechanical liquid boosting and superposition mechanism according to claim 3, characterized in that: Two first hydraulic locks are provided in sequence on the pipeline between the upper cavity of the first hydraulic jack and the reversing valve group, and the first stop valve connected to the first hydraulic jack is located between the two first hydraulic locks.

5. A mining mechanical liquid boosting and superimposed pressure mechanism according to claim 1, characterized in that: A second hydraulic lock, a pressure gauge, and a second stop valve are provided in sequence on the pipeline between the upper cavity of the last hydraulic jack and the hydraulic equipment to be pressurized.

6. A mine-used mechanical liquid pressurizing and superimposing mechanism according to claim 1, characterized in that: The reversing valve group is a three-position four-way reversing valve group, and the number of hydraulic jacks is two.

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