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CN-121997542-A - Coal face hydraulic support energy accumulator selection method

CN121997542ACN 121997542 ACN121997542 ACN 121997542ACN-121997542-A

Abstract

The coal face hydraulic support energy accumulator type selection method comprises the following steps of S1, determining minimum pressure required by the coal face hydraulic support energy accumulator type selection method, emulsion volume required by three stages of top beam descending, support forward moving and top beam ascending in the support moving process of the hydraulic support, maximum support moving time required by the support moving of the hydraulic support and the number of the hydraulic supports moving simultaneously, S2, determining rated flow and rated pressure of emulsion conveyed by the pump station, S3, substituting into a formula to obtain the required volume of the energy accumulator, and therefore, the coal face hydraulic support energy accumulator type selection method can select a proper energy accumulator, reduce cost waste and play a role in stabilizing pressure.

Inventors

  • ZHAO SHUJI
  • REN HUAIWEI
  • ZHOU JIE
  • ZHANG DESHENG
  • ZHANG SHUAI
  • GONG SHIXIN
  • DU MING
  • LI SHUAISHUAI
  • HAN ZHE

Assignees

  • 中煤科工开采研究院有限公司
  • 天地科技股份有限公司

Dates

Publication Date
20260508
Application Date
20251218

Claims (10)

  1. 1. A method for selecting the type of an energy accumulator of a hydraulic bracket of a coal face is characterized in that based on a hydraulic system of the coal face, the hydraulic system of the coal face comprises a plurality of hydraulic supports, and a pump station and an energy accumulator which are matched with the hydraulic supports, and the method for selecting the energy accumulator of the hydraulic support of the coal face comprises the following steps: S1, determining the minimum pressure required by the hydraulic system of the coal face, the emulsion volume required by three stages of top beam descending, bracket advancing and top beam ascending in the process of moving the hydraulic bracket, the maximum bracket moving time required by moving the hydraulic bracket and the number of the hydraulic brackets which are simultaneously moved; s2, determining rated flow and rated pressure of emulsion conveyed by a pump station; s3, substituting the following formula to obtain the required volume of the energy accumulator; ... 1A In formula 1: for the number of hydraulic supports that are simultaneously moved, The volume of emulsion required for the hydraulic bracket header to descend, For the volume of emulsion required for the hydraulic support frame to advance, For the volume of emulsion required for the hydraulic bracket header to rise, For the rated flow rate of the emulsion delivered by the pump station, For the maximum frame-shifting time required for frame shifting, For the rated pressure of the emulsion delivered by the pump station, For the minimum pressure required by the coal face hydraulic system, Is a constant of 1 or more, For the required minimum volume of the accumulator, The volume required for the accumulator.
  2. 2. The method for selecting the type of the hydraulic bracket accumulator of the coal face according to claim 1, characterized in that the minimum volume required by the accumulator The calculation process comprises the following formulas: ... 2.2 ... 3A 3 ... 4.4 .. ... 6. 6 ... 7. 7 In formulas 2 to 7: for the number of hydraulic supports that are simultaneously moved, The volume of emulsion required for the hydraulic bracket header to descend, For the volume of emulsion required for the hydraulic support frame to advance, For the volume of emulsion required for the hydraulic bracket header to rise, For the rated flow rate of the emulsion delivered by the pump station, For the maximum frame-shifting time required for frame shifting, For the rated pressure of the emulsion delivered by the pump station, For the minimum pressure required by the coal face hydraulic system, Is a constant of 1 or more, For the required minimum volume of the accumulator, For the volume required for the accumulator, Pre-charge the accumulator with gas pressure, The volume in the air cavity after the interior of the accumulator enters the emulsion, For the maximum emulsion volume that can be accommodated inside the accumulator.
  3. 3. The method for selecting the energy accumulator of the hydraulic support of the coal face according to claim 2, wherein the calculation process of the required volume of the energy accumulator comprises the following steps of combining the formula 4 and the formula 5, obtaining the formula 7 through simplification, and taking the formula 6 into the formula 7 to obtain the formula 1.
  4. 4. The method of claim 1, wherein the accumulator requires a volume of the accumulator With a required minimum volume of the accumulator The ratio of (1-1.2): 1.
  5. 5. The method of claim 2, wherein the volume required for the accumulator satisfies the following equation ... 8. 8 In formula 8: for the required minimum volume of the accumulator, The volume required for the accumulator.
  6. 6. The method for selecting the type of the hydraulic bracket accumulator of the coal face according to claim 1, wherein, The pressure of the pre-inflating body in the accumulator The minimum pressure required by the coal face hydraulic system is greater than or equal to the minimum pressure required by the coal face hydraulic system ; 1.1.
  7. 7. The coal face hydraulic cradle accumulator sizing method of any one of claims 1-6, wherein the accumulator comprises at least one of an accumulator station and a cradle accumulator.
  8. 8. The coal face hydraulic support accumulator selection method of claim 7 wherein the accumulator includes the accumulator station having a volume of 。
  9. 9. The method for selecting a hydraulic support accumulator for a coal face according to claim 7, wherein the accumulator includes a plurality of the onboard accumulators, the plurality of onboard accumulators being connected to the plurality of hydraulic supports in a one-to-one correspondence, The sum of the volumes of the rack accumulators is , The number of the hydraulic supports for simultaneous frame movement.
  10. 10. The method of claim 7, wherein said accumulator comprises said accumulator station and a plurality of said cradle accumulators, said plurality of cradle accumulators being connected to said plurality of hydraulic cradles in a one-to-one correspondence, said accumulator station and said cradle accumulator station The sum of the volumes of the rack accumulators is , The number of the hydraulic supports for simultaneous frame movement.

Description

Coal face hydraulic support energy accumulator selection method Technical Field The invention relates to the technical field of energy accumulators, in particular to a method for selecting the type of an energy accumulator of a hydraulic support of a coal face. Background In order to ensure the efficient operation of the coal face, the pushing speed needs to be improved as much as possible, and an accumulator station is arranged at a pump station or an accumulator is arranged at each bracket to form a large-capacity energy storage system so as to realize better pressure stabilization and flow compensation effects. However, the current accumulator is selected by experience, the requirement of high-pressure emulsion in the action process of the bracket cannot be accurately matched, the total volume and the pre-charging pressure of the accumulator are too large, cost waste is easy to cause, the total volume of the accumulator is too small, and a good pressure stabilizing effect cannot be achieved. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the embodiment of the invention provides a method for selecting the type of the hydraulic support energy accumulator of the coal face. The method for selecting the type of the energy accumulator of the hydraulic support of the coal face, which is provided by the embodiment of the invention, is based on a hydraulic system of the coal face, wherein the hydraulic system of the coal face comprises a plurality of hydraulic supports, and a pump station and an energy accumulator which are matched with the hydraulic supports, and the method for selecting the type of the energy accumulator of the hydraulic support of the coal face comprises the following steps: S1, determining the minimum pressure required by the hydraulic system of the coal face, the emulsion volume required by three stages of top beam descending, bracket advancing and top beam ascending in the process of moving the hydraulic bracket, the maximum bracket moving time required by moving the hydraulic bracket and the number of the hydraulic brackets which are simultaneously moved; s2, determining rated flow and rated pressure of emulsion conveyed by a pump station; s3, substituting the following formula to obtain the required volume of the energy accumulator; ... 1A In formula 1: for the number of hydraulic supports that are simultaneously moved, The volume of emulsion required for the hydraulic bracket header to descend,For the volume of emulsion required for the hydraulic support frame to advance,For the volume of emulsion required for the hydraulic bracket header to rise,For the rated flow rate of the emulsion delivered by the pump station,For the maximum frame-shifting time required for frame shifting,For the rated pressure of the emulsion delivered by the pump station,For the minimum pressure required by the coal face hydraulic system,Is a constant of 1 or more,For the required minimum volume of the accumulator,The volume required for the accumulator. Therefore, the method for selecting the energy accumulator of the hydraulic support of the coal face can select a proper energy accumulator, so that the cost waste is reduced, and the pressure stabilizing effect can be achieved. In some embodiments, the minimum volume required by the accumulatorThe calculation process comprises the following formulas: ... 2.2 ... 3A 3 ... 4.4 .. ... 6. 6 ... 7. 7 In formulas 2 to 7: for the number of hydraulic supports that are simultaneously moved, The volume of emulsion required for the hydraulic bracket header to descend,For the volume of emulsion required for the hydraulic support frame to advance,For the volume of emulsion required for the hydraulic bracket header to rise,For the rated flow rate of the emulsion delivered by the pump station,For the maximum frame-shifting time required for frame shifting,For the rated pressure of the emulsion delivered by the pump station,For the minimum pressure required by the coal face hydraulic system,Is a constant of 1 or more,For the required minimum volume of the accumulator,For the volume required for the accumulator,Pre-charge the accumulator with gas pressure,The volume in the air cavity after the interior of the accumulator enters the emulsion,For the maximum emulsion volume that can be accommodated inside the accumulator. In some embodiments, the calculation of the required volume of the accumulator includes combining equation 4 and equation 5 and obtaining equation 7 by simplification, and substituting equation 6 into equation 7 to obtain equation 1. In some embodiments, the volume required by the accumulatorWith a required minimum volume of the accumulatorThe ratio of (1-1.2): 1. In some embodiments, the volume required by the accumulator satisfies the following formula ... 8. 8 In formula 8: for the required minimum volume of the accumulator, The volume required for the accu