Hydraulic punching experiment simulation device

Abstract

The utility model provides a hydraulic punching experiment simulation device which comprises a water supply system, a hydraulic punching system and an experiment sample clamping device, the water supply system is connected with the hydraulic punching system through a high-pressure hose, and the hydraulic punching experiment simulation device can be used for carrying out a large-scale water jet simulation experiment in a laboratory or an industrial field. The key problem that water jet pressure relief and permeability increase construction process parameters are difficult to accurately match with coal seams with different burying characteristics and strength characteristics is safely and efficiently solved, and reliable technical support is provided for low-permeability coal seam hydraulic formation hole pressure relief and permeability increase field application.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control of coal mine gas disasters, and particularly relates to a hydraulic punching experiment simulation device. Background Technique

[0002] The technology of hydraulic control of coal seam gas disasters has gradually become one of the main technologies for pressure relief and permeability increase of low-permeability coal seams due to its unique advantages such as safety, high efficiency, and cleanliness. However, in the face of the complexity, particularity, and mutability of deep coal seam gas disasters, the water jet pressure relief and permeability increase technology still has problems that need to be urgently solved, such as poor large-scale pressure relief and permeability increase effects, limited implementation application conditions, and insufficient technical synergy.

[0003] Engineering and technical personnel in this field need to carry out large-scale water jet simulation experiments in the laboratory or industrial site. How to accurately match the construction process parameters of water jet pressure relief and permeability increase with coal seams of different burial characteristics and strength characteristics is an urgent technical problem faced during the simulation experiment. Content of the Utility Model

[0004] In order to solve the technical problems in the existing field, the utility model provides a hydraulic punching experiment simulation device. This device can be used to carry out large-scale water jet simulation experiments in the laboratory or industrial site, safely and efficiently solve the key problem that it is difficult to accurately match the construction process parameters of water jet pressure relief and permeability increase with coal seams of different burial characteristics and strength characteristics, and provide reliable technical support for the on-site application of hydraulic hole forming and pressure relief and permeability increase of low-permeability coal seams.

[0005] A hydraulic punching experiment simulation device includes a water supply system, a hydraulic punching system, and an experimental specimen clamping device. The water supply system is connected to the hydraulic punching system through a high-pressure hose.

[0006] The water supply system includes a water storage tank body, a water inlet pipe, a motor, and a high-pressure water pump. The water storage tank body is connected to the water inlet of the high-pressure water pump through the water inlet pipe. The water outlet of the high-pressure water pump is connected to the high-pressure hose through a high-pressure water pipe. The motor is connected to the high-pressure water pump to provide power.

[0007] The hydraulic punching system includes a high-pressure steel pipe, a pipeline height adjustment bracket, and a jet nozzle. One end of the high-pressure steel pipe is connected to the high-pressure hose through a valve. The other end of the high-pressure steel pipe is provided with a jet nozzle. The middle part of the high-pressure steel pipe is provided with a pipeline height adjustment bracket.

[0008] The experimental sample clamping device includes an L-shaped clamping fixed plate, a clamping device tray, an adjustment slot, a clamping device fixing frame, and a slide rail. The clamping device fixing frame is arranged on the slide rail through a fastening bolt. A clamping device tray is arranged on one side of the clamping device fixing frame. The upper edge of the clamping device tray is cut with an adjustment slot in a direction at an angle of 45° to the vertical direction. The L-shaped clamping fixed plate is fixed on the clamping device tray along the adjustment slot through a fixing bolt.

[0009] Further, valves are respectively arranged on the water inlet pipe and the high-pressure water outlet pipe.

[0010] Further, a pressure gauge is arranged on the high-pressure steel pipe.

[0011] Further, there are at least two pipeline height adjustment brackets, which are arranged symmetrically about the center of the high-pressure steel pipe or evenly spaced.

[0012] Further, the high-pressure water pump can provide a high-pressure water jet of 5 - 20 MPa. The diameter of the water inlet pipe is 150 mm, and the diameter of the high-pressure water outlet pipe is 100 mm.

[0013] Further, the clamping device tray is installed on the clamping device fixing frame through a fastening bolt.

[0014] Further, there are four groups of adjustment slots. Two adjacent groups of adjustment slots along the circumferential direction are perpendicular to each other. The four groups of adjustment slots are centrosymmetric on the clamping device tray. Each group includes two parallel adjustment slots.

[0015] Further, the experimental sample clamping device can control the L-shaped clamping fixed plate to move separately towards the sample in any direction by moving the position of the L-shaped clamping fixed plate on the adjustment slot.

[0016] Further, the two adjustment slots in each group of adjustment slots are 80 mm apart, 450 mm in length, and 40 mm in width.

[0017] Further, the length of the baffle part of the L-shaped clamping fixed plate is 300 mm, the length of the bottom plate part is 400 mm, the width is 300 mm, and the thickness of the L-shaped clamping fixed plate is 10 mm.

[0018] The utility model realizes the overall displacement effect of the jet pipeline by connecting the water supply system and the hydraulic punching system through a high-pressure hose. The clamping device fixing frame is fixed on the slide rail installed on the ground through a fastening bolt. After loosening the fastening bolt, the device fixing frame can be moved as a whole to change the distance between the jet nozzle and the experimental sample. The experimental sample clamping device can control the L-shaped clamping fixed plate to move separately towards the sample in any direction by moving the position of the L-shaped clamping fixed plate on the adjustment slot, expanding the clamping capacity range of the device.

[0019] This device can be used for high-pressure water jet punching and reaming experiments to monitor the grooving and hole-forming effects under different jet parameters, and to conduct experiments on water jet impact breaking of coal and rock masses with different strength characteristics to determine the water jet impact breaking ability. This device can be used to improve and optimize the high-pressure water jet pressure relief and permeability enhancement technology device, enhance the jet hole-forming pressure relief and permeability enhancement effect, and expand the application scope of the water jet pressure relief and permeability enhancement technology. Description of the Drawings

[0020] Figure 1 It is the overall schematic diagram of the hydraulic punching experiment simulation device, including three parts a, b, and c.

[0021] Figure 2 It is the structural schematic diagram of the water supply system of part a;

[0022] Figure 3 It is the structural schematic diagram of the hydraulic punching system of part b;

[0023] Figure 4 It is the structural schematic diagram of the experimental specimen clamping device of part c;

[0024] Figure 5 It is the structural schematic diagram of the L-shaped clamping fixing plate;

[0025] In the figure, 1 - water storage tank body, 2 - valve, 3 - motor, 4 - water inlet pipe, 5 - high-pressure water pump, 6 - high-pressure water outlet pipeline, 7 - high-pressure hose, 8 - pressure gauge, 9 - high-pressure steel pipe, 10 - pipeline height adjustment bracket, 11 - jet nozzle, 12 - L-shaped clamping fixing plate, 13 - clamping device tray, 14 - adjustment card slot, 15 - fixing bolt, 16 - clamping device fixing frame, 17 - fastening bolt, 18 - slide rail. Detailed Implementation Modes

[0026] The following will describe the present utility model in detail with reference to the drawings and embodiments:

[0027] As Figures 1-5 shown, a hydraulic punching experiment simulation device of the present utility model includes: a water supply system, a hydraulic punching system, and an experimental specimen clamping device. The water supply system is connected to the hydraulic punching system through the high-pressure hose 7;

[0028] The water supply system includes a water storage tank body 1, a water inlet pipe 4, a motor 3, and a high-pressure water pump 5. The water storage tank body 1 is connected to the water inlet of the high-pressure water pump 5 through the water inlet pipe 4. The water outlet of the high-pressure water pump 5 is connected to the high-pressure hose 7 through the high-pressure water outlet pipeline 6. The motor 3 is connected to the high-pressure water pump 5 to provide power;

[0029] The hydraulic punching system includes a high-pressure steel pipe 9, a pipeline height adjustment bracket 10, and a jet nozzle 11. One end of the high-pressure steel pipe 9 is connected to a high-pressure hose 7 through a valve. The other end of the high-pressure steel pipe 9 is provided with a jet nozzle 11. The middle part of the high-pressure steel pipe 9 is provided with a pipeline height adjustment bracket 10;

[0030] The experimental specimen clamping device includes an L-shaped clamping fixed plate 12, a clamping device tray 13, an adjustment slot 14, a clamping device fixing frame 16, and a slide rail 18. The clamping device fixing frame 16 is arranged on the slide rail 18 through a fastening bolt 17. One side of the clamping device fixing frame 16 is provided with a clamping device tray 13. The upper edge of the clamping device tray 13 is cut with an adjustment slot 14 at an angle of 45° to the vertical direction. The L-shaped clamping fixed plate 12 is fixed on the clamping device tray 13 along the adjustment slot 14 through a fixing bolt 15.

[0031] In a specific embodiment, valves 2 are respectively arranged on the water inlet pipe 4 and the high-pressure water outlet pipeline 6. A pressure gauge 8 is arranged on the high-pressure steel pipe 9. The pipeline height adjustment brackets 10 are at least two, and are arranged symmetrically about the center of the high-pressure steel pipe 9 or at equal intervals.

[0032] In a specific embodiment, the high-pressure water pump 5 can provide a high-pressure water jet of 5 - 20 MPa. The diameter of the water inlet pipe 4 is 150 mm, and the diameter of the high-pressure water outlet pipeline 6 is 100 mm.

[0033] In a specific embodiment, the clamping device tray 13 is installed on the clamping device fixing frame 16 through a fastening bolt 17.

[0034] In a specific embodiment, four groups of adjustment slots 14 are provided. Two adjacent groups of adjustment slots in the circumferential direction are perpendicular to each other. The four groups of adjustment slots are centrosymmetric on the clamping device tray. Each group includes two parallel adjustment slots. The experimental specimen clamping device can control the L-shaped clamping fixed plate 12 to move independently towards the specimen in any orientation by moving the position of the L-shaped clamping fixed plate 12 on the adjustment slot 14. The distance between the two adjustment slots in each group is 80 mm, the length is 450 mm, and the width is 40 mm.

[0035] In a specific embodiment, the length of the baffle part of the L-shaped clamping fixed plate 12 is 300 mm, the length of the bottom plate part is 400 mm, the width is 300 mm, and the thickness of the L-shaped clamping fixed plate 12 is 10 mm.

[0036] A hydraulic punching experiment simulation device adopting the utility model can accurately control key process parameters such as jet flow rate, jet pressure, punching time, punching angle, etc. during water jet hole formation, and is used for large-scale water jet simulation in the laboratory and the analysis of the jet cutting hole formation results of experimental specimens in hydraulic punching experiments, etc., to provide reliable technical support for the selection of key jet process parameters for hydraulic pressure relief and permeability enhancement of low-permeability coal seams. The steps are as follows:

[0037] Connect the high-pressure water outlet pipeline, high-pressure hose, and high-pressure steel pipe to form an integral water jet pipeline. Select a jet nozzle with a suitable caliber required for this experiment and install it at the end of the high-pressure steel pipe through a double-pin straight-through connection; fix the high-pressure steel pipe part in the water jet pipeline on a multi-section pipeline height adjustment bracket; adjust the movable L-shaped clamping fixing plate to the required position, install the test specimen required for the experiment in the clamping device, and adjust the fixing bolt to clamp and fix the test specimen; adjust the position of the clamping device fixing frame on the slide rail according to the specific requirements of the experiment; move and check the position of the height adjustment frame to align the jet nozzle with the center of the experimental specimen; check the pipeline connection status and the overall installation of the equipment. After the water level in the water storage tank reaches the required height, generally about 2 / 3 of the total volume of the water tank, open the valve on the pipeline; after the equipment is checked and there is no error, start the high-pressure water pump to start the jet punching experiment, monitor the working condition of the equipment in real time, and record the experimental data; after the jet punching experiment is completed, tidy up and recycle the device for the next use.

[0038] The utility model realizes the displacement effect of the integral jet pipeline by connecting the water supply system and the hydraulic punching system through a high-pressure hose. The clamping device fixing frame is fixed on the slide rail installed on the ground by a fastening bolt. After loosening the fastening bolt, the device fixing frame can be moved as a whole to change the distance between the jet nozzle and the experimental specimen. The experimental specimen clamping device can control the individual movement of the L-shaped clamping fixing plate in any direction towards the specimen by moving the position of the L-shaped clamping fixing plate on the adjustment slot, expanding the clamping capacity range of the device.

[0039] This device can be used for high-pressure water jet punching and hole expanding experiments to monitor the cutting hole formation effect under different jet parameters; carry out water jet impact crushing experiments on coal and rock masses with different strength characteristics to measure the water jet impact crushing ability. This device can be used to improve and optimize the high-pressure water jet pressure relief and permeability enhancement technical device, enhance the jet hole formation pressure relief and permeability enhancement effect, and expand the application range of the water jet pressure relief and permeability enhancement technology.

Claims

1. A hydraulic punching experiment simulation device, characterized in that, Comprising: A water supply system, a hydraulic punching system and an experimental specimen clamping device. The water supply system is connected to the hydraulic punching system through a high-pressure hose; The water supply system includes a water storage tank body, a water inlet pipe, an electric motor, and a high-pressure water pump. The water storage tank body is connected to the water inlet of the high-pressure water pump through the water inlet pipe. The water outlet of the high-pressure water pump is connected to the high-pressure hose through a high-pressure water outlet pipeline. The electric motor is connected to the high-pressure water pump to provide power; The hydraulic punching system includes a high-pressure steel pipe, a pipeline height adjustment bracket, and a jet nozzle. One end of the high-pressure steel pipe is connected to the high-pressure hose through a valve. A jet nozzle is provided at the other end of the high-pressure steel pipe. A pipeline height adjustment bracket is provided in the middle of the high-pressure steel pipe; The experimental specimen clamping device includes an L-shaped clamping fixed plate, a clamping device tray, an adjustment slot, a clamping device fixing frame, and a slide rail. The clamping device fixing frame is arranged on the slide rail through a fastening bolt. A clamping device tray is provided on one side of the clamping device fixing frame. The upper edge of the clamping device tray is cut with adjustment slots in a direction at an angle of 45° to the vertical direction. The L-shaped clamping fixed plate is fixed on the clamping device tray along the adjustment slots through fixing bolts.

2. The hydraulic punching experiment simulation device according to claim 1, wherein Valves are respectively provided on the water inlet pipe and the high-pressure water outlet pipeline.

3. The hydraulic punching experiment simulation device according to claim 1, wherein, A pressure gauge is provided on the high-pressure steel pipe.

4. A hydraulic punching experiment simulation device according to claim 1, wherein, There are at least two pipeline height adjustment brackets, which are symmetrically arranged along the center of the high-pressure steel pipe or evenly spaced.

5. The hydraulic punching experiment simulation device according to claim 1, characterized in that, The high-pressure water pump can provide a high-pressure water jet of 5 - 20 MPa. The diameter of the water inlet pipe is 150 mm, and the diameter of the high-pressure water outlet pipeline is 100 mm.

6. The hydraulic punching experiment simulation device according to claim 1, characterized in that, The clamping device tray is installed on the clamping device fixing frame through a fastening bolt.

7. The hydro - punching experiment simulation device according to claim 1, characterized in that, There are four groups of adjustment slots. Two adjacent groups of adjustment slots in the circumferential direction are perpendicular to each other. The four groups of adjustment slots are centrosymmetric on the clamping device tray. Each group includes two parallel adjustment slots.

8. A hydraulic punching experiment simulation device according to claim 1, characterized in that, The experimental specimen clamping device can control the L-shaped clamping fixed plate to move towards the specimen alone in any direction by moving the position of the L-shaped clamping fixed plate on the adjustment slots.

9. A hydraulic punching experiment simulation device according to any one of claims 7-8, characterized in that The distance between the two adjustment slots in each group of adjustment slots is 80 mm, the length is 450 mm, and the width is 40 mm.

10. A hydraulic punching experiment simulation device according to any one of claims 7-8, characterized in that, The length of the baffle part of the L-shaped clamping fixed plate is 300 mm, the length of the bottom plate part is 400 mm, the width is 300 mm, and the thickness of the L-shaped clamping fixed plate is 10 mm.

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