Coal-bed gas well pulverized coal aggregate dispersion effect testing device

Abstract

The invention relates to the technical field of pulverized coal aggregate dispersion effect testing, in particular to a coal-bed gas well pulverized coal aggregate dispersion effect testing device, a gas outlet of a gas pump is communicated with a dispersion pipe, the dispersion pipe extends into a crack, a plurality of exhaust holes are formed in the upper end of the dispersion pipe at equal intervals in the length direction, and a supporting frame is fixedly connected to the upper end of a model base; the supporting frame is fixedly connected with a transparent protection plate, the upper end of the supporting frame is connected with a displacement regulator, and the displacement regulator is connected with a camera. The displacement adjuster is started to drive the camera to move in the vertical direction, the height of the camera is adjusted according to the pressure value measured by the pressure sensor, the transparent protection plate is located between the crack and the camera in the test process, the transparent protection plate blocks splashing pulverized coal, the pulverized coal is prevented from colliding with a lens of the camera, and the test accuracy is improved. And the lens of the camera cannot be scratched, so that the shooting effect of the camera is improved, and the test precision is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pulverized coal aggregate dispersion effect tests, and in particular to a test device for the dispersion effect of pulverized coal aggregates in coalbed methane wells. Background Art

[0002] During the exploitation of coalbed methane wells, the migration and blockage of pulverized coal are one of the key problems affecting production capacity. The test on the dispersion effect of pulverized coal aggregates aims to study the aggregation, dispersion behavior of pulverized coal in wellbores or fractures and its influencing factors, so as to provide a basis for the prevention and control of pulverized coal and production increase measures. The purpose of the test on the dispersion effect of pulverized coal aggregates is to evaluate the dispersion characteristics of pulverized coal aggregates under different conditions, determine the critical conditions for pulverized coal blockage, and optimize the drainage and production system.

[0003] When putting the pulverized coal aggregate into the fracture of the fracture model during the test, gas is introduced into the fracture through an air pump, the pressure sensor detects the pressure in the fracture, the pulverized coal aggregate splashes from the fracture, the splashing pulverized coal is photographed by a camera, and the critical conditions for pulverized coal blockage are determined after analyzing the photographed information. During the process of the camera photographing, the splashing pulverized coal is likely to collide with the lens of the camera, resulting in scratches on the lens, thereby reducing the photographing effect of the camera and further reducing the test accuracy. Summary of the Invention

[0004] The purpose of the present invention is to solve the defect that the splashing pulverized coal in the prior art is likely to collide with the lens of the camera, resulting in scratches on the lens, thereby reducing the photographing effect of the camera and further reducing the test accuracy, and to propose a test device for the dispersion effect of pulverized coal aggregates in coalbed methane wells.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme: Design a test device for the dispersion effect of pulverized coal aggregates in coalbed methane wells, including a model base, a fracture is opened at the upper end of the model base, a pressure sensor is arranged in the fracture, an air pump is fixedly connected to the model base, an air outlet of the air pump is communicated with a dispersion pipe, the dispersion pipe extends into the fracture, a plurality of exhaust holes are equidistantly arranged along the length direction at the upper end of the dispersion pipe, a support frame is fixedly connected to the upper end of the model base, a transparent protection plate is fixedly connected to the support frame, a displacement regulator is connected to the upper end of the support frame, and a camera is connected to the displacement regulator.

[0006] Preferably, an anti-slip pad is fixedly connected to the bottom end of the model base.

[0007] Preferably, the displacement regulator includes two symmetrically arranged connecting bars, both of the two symmetrically arranged connecting bars are slidably connected to the support frame, a mounting frame is fixedly connected between the two connecting bars, a camera is connected to the mounting frame, a servo motor is fixedly connected to the upper end of the support frame, and an output end of the servo motor is connected to a threaded rod for driving the mounting frame to move in the vertical direction.

[0008] Preferably, the transparent protection plate is a transparent glass plate.

[0009] Preferably, a brightening mechanism for cleaning the transparent protection plate is connected to the upper end of the support frame. The brightening mechanism includes a mounting plate, the mounting plate is fixedly connected to the upper end of the support frame, an electric telescopic rod is fixedly connected to the mounting plate, a fixing frame is fixedly connected to the telescopic end of the electric telescopic rod, the fixing frame is slidably connected to the support frame, a scraping member is connected to the fixing frame, and the scraping member contacts the transparent protection plate.

[0010] Preferably, the scraping member includes a movable plate, the movable plate is slidably connected to the fixing frame, a wiping pad is fixedly connected to the movable plate, the wiping pad contacts the transparent protection plate, a spring is fixedly connected to the movable plate, and one end of the spring is fixedly connected to the fixing frame.

[0011] Preferably, a plurality of springs are provided and are equally spaced along the length direction of the movable plate.

[0012] Preferably, the wiping pad is an elastic sponge pad.

[0013] Preferably, a storage cabinet is fixedly connected to the upper end of the model base, a drawer is inserted into the storage cabinet, and a handle is connected to the drawer.

[0014] Preferably, a collection box is fixedly connected to the outside of the model base, a baffle is fixedly connected to the upper end of the model base, and the baffle is located between the crack and the storage cabinet.

[0015] The beneficial effects of a coalbed methane well coal powder aggregate dispersion effect test device proposed by the present invention are as follows: After the displacement regulator is started, it drives the camera to move in the vertical direction, adjusts the height of the camera according to the pressure value measured by the pressure sensor. During the test, the transparent protection plate is located between the crack and the camera. The transparent protection plate blocks the splashing coal powder, avoids the collision between the coal powder and the lens of the camera, does not scratch the lens of the camera, improves the imaging effect of the camera, and further improves the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a coalbed methane well coal powder aggregate dispersion effect test device proposed by the present invention Figure 1 ; Figure 2 Structural schematic of an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well proposed by the present invention Figure 2 ; Figure 3 Structural schematic diagram of the connection between the support frame and the displacement regulator in an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well proposed by the present invention; Figure 4 Structural schematic diagram of the connection between the support frame and the transparent protection plate in an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well proposed by the present invention; Figure 5 Cross-sectional structural schematic diagram of the connection between the support frame and the transparent protection plate of an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well proposed by the present invention; Figure 6 Structural schematic diagram of the connection between the support frame and the lighting mechanism in an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well proposed by the present invention; Figure 7 For Figure 6 Partial enlarged structural schematic diagram at point A above.

[0017] In the figure: 1, model base; 2, crack; 3, air pump; 4, support frame; 5, transparent protection plate; 6, displacement regulator; 7, camera; 8, lighting mechanism; 9, storage cabinet; 10, drawer; 11, collection box; 12, baffle; 61, connecting strip; 62, mounting bracket; 63, servo motor; 64, threaded rod; 81, mounting plate; 82, electric telescopic rod; 83, fixing bracket; 84, movable plate; 85, wiping pad; 86, spring. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Embodiment 1: Refer to Figures 1 - 3 , an experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well, including a model base 1, a non-slip pad is fixedly connected to the bottom end of the model base 1, the non-slip pad is a rubber pad, a crack 2 is opened at the upper end of the model base 1, a pressure sensor is arranged in the crack 2, an air pump 3 is fixedly connected to the model base 1, the air outlet of the air pump 3 is communicated with a dispersion pipe, the dispersion pipe extends into the crack 2, a plurality of exhaust holes are equidistantly arranged along the length direction at the upper end of the dispersion pipe, a support frame 4 is fixedly connected to the upper end of the model base 1, a transparent protection plate 5 is fixedly connected to the support frame 4, the transparent protection plate 5 is a transparent glass plate, a displacement regulator 6 is connected to the upper end of the support frame 4, and a camera 7 is connected to the displacement regulator 6.

[0020] Working process: The model base 1 is placed on the ground. The anti-slip pad increases the friction between the model base 1 and the ground, making it difficult for the model base 1 to slide after being placed. The pulverized coal aggregate is put into the crack 2. The control box controls the air pump 3 to start working after being powered on. After the air pump 3 starts, it sucks air, and the sucked air is introduced into the dispersion pipe. The gas in the dispersion pipe is released from different exhaust holes, and the released gas is introduced into the crack 2. The pressure sensor detects the pressure in the crack 2. The gas introduced into the crack 2 blows the pulverized coal aggregate upward, and the pulverized coal aggregate scatters and splashes from the crack 2. The controller controls the displacement regulator 6 to start working after being powered on. After the displacement regulator 6 starts, it drives the camera 7 to move in the vertical direction, and adjusts the height of the camera 7 according to the pressure value measured by the pressure sensor. The greater the pressure value, the higher the height of the camera 7 is adjusted. During the test, the transparent protection plate 5 is located between the crack 2 and the camera 7. The transparent protection plate 5 blocks the splashing pulverized coal, preventing the pulverized coal from colliding with the lens of the camera 7 and not scratching the lens of the camera 7, improving the imaging effect of the camera 7 and thus improving the test accuracy.

[0021] Example 2: When taking pictures through the camera 7, it is not convenient to adjust the imaging height of the camera 7 as needed. Refer to Figures 3 - 4 , as another preferred embodiment of the present invention, the difference from Example 1 is that the displacement regulator 6 includes two symmetrically arranged connecting bars 61. The two symmetrically arranged connecting bars 61 are both slidably connected to the support frame 4. An installation frame 62 is fixedly connected between the two connecting bars 61, and the camera 7 is connected to the installation frame 62. A servo motor 63 is fixedly connected to the upper end of the support frame 4, and the output end of the servo motor 63 is connected with a threaded rod 64 for driving the installation frame 62 to move in the vertical direction. When adjusting the height of the camera 7, the control box controls the servo motor 63 to drive the threaded rod 64 to rotate clockwise. After the threaded rod 64 rotates, under the guidance of the connecting bar 61, the installation frame 62 moves upward to increase the height of the camera 7. The control box controls the servo motor 63 to drive the threaded rod 64 to rotate counterclockwise. After the threaded rod 64 rotates, under the guidance of the connecting bar 61, the installation frame 62 moves downward to reduce the height of the camera 7.

[0022] Example 3: The transparent protection plate 5 protects the camera 7. The splashing pulverized coal adheres to the transparent protection plate 5, covering a part of the transparent protection plate 5, resulting in black spots in the imaging information, thus reducing the imaging effect of the camera 7. Refer to Figures 3 - 7, as another preferred embodiment of the present invention, the difference from Embodiment 1 is that a brightening mechanism 8 for cleaning the transparent protection plate 5 is connected to the upper end of the support frame 4. The brightening mechanism 8 includes a mounting plate 81, the mounting plate 81 is fixedly connected to the upper end of the support frame 4, an electric telescopic rod 82 is fixedly connected to the mounting plate 81, a fixing frame 83 is fixedly connected to the telescopic end of the electric telescopic rod 82, the fixing frame 83 is slidably connected to the support frame 4, a scraping member is connected to the fixing frame 83, and the scraping member contacts the transparent protection plate 5; The scraping member includes a movable plate 84, the movable plate 84 is slidably connected to the fixing frame 83, a wiping pad 85 is fixedly connected to the movable plate 84, the wiping pad 85 contacts the transparent protection plate 5, the wiping pad 85 is an elastic sponge pad, a spring 86 is fixedly connected to the movable plate 84, one end of the spring 86 is fixedly connected to the fixing frame 83, and a plurality of springs 86 are provided and are equally spaced along the length direction of the movable plate 84; The spring 86 generates a pushing force on the movable plate 84, the movable plate 84 drives the wiping pad 85 to move towards the transparent protection plate 5, the wiping pad 85 is in close contact with the transparent protection plate 5, the control box controls the electric telescopic rod 82 to be energized and started, after the electric telescopic rod 82 starts, it drives the fixing frame 83 to reciprocate horizontally, the fixing frame 83 drives the movable plate 84 to move, the movable plate 84 drives the wiping pad 85 to move, and after the wiping pad 85 moves, it cleans the surface of the transparent protection plate 5, scrapes off the adhered pulverized coal, and maintains the transparent effect of the transparent protection plate 5, thereby improving the imaging effect of the camera 7.

[0023] Embodiment 4: When the gas blows the pulverized coal aggregate, the pulverized coal aggregate splashes after being blown, and the splashed pulverized coal falls on the ground, which is not convenient for collection. Refer to Figures 1 - 2 , as another preferred embodiment of the present invention, the difference from Embodiment 1 is that a storage cabinet 9 is fixedly connected to the upper end of the model base 1, a drawer 10 is inserted into the storage cabinet 9, a handle is connected to the drawer 10, a collection box 11 is fixedly connected to the outside of the model base 1, and a baffle 12 is fixedly connected to the upper end of the model base 1. The baffle 12 is located between the crack 2 and the storage cabinet 9. The pulverized coal is placed in the drawer 10 for storage. When the pulverized coal is needed, the drawer 10 is pulled through the handle, so that the drawer 10 is misaligned with the storage cabinet 9, which is convenient for taking out the pulverized coal in the drawer 10. The collection box 11 is located outside the model base 1 and collects the pulverized coal that falls from the side of the model base 1. At the same time, the baffle 12 blocks the pulverized coal to prevent the pulverized coal from falling on the storage cabinet 9. The cooperation between the collection box 11 and the storage cabinet 9 facilitates the collection of the pulverized coal.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well, comprising a model base (1), a crack (2) is formed at the upper end of the model base (1), and a pressure sensor is arranged in the crack (2), characterized in that, Wherein: An air pump (3) is fixedly connected to the model base (1). The air outlet of the air pump (3) is communicated with a dispersion pipe, and the dispersion pipe extends into the crack (2). A plurality of exhaust holes are equidistantly arranged along the length direction at the upper end of the dispersion pipe. A support frame (4) is fixedly connected to the upper end of the model base (1), and a transparent protection plate (5) is fixedly connected to the support frame (4). A displacement regulator (6) is connected to the upper end of the support frame (4), and a camera (7) is connected to the displacement regulator (6).

2. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 1, wherein, An anti-slip pad is fixedly connected to the bottom end of the model base (1).

3. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 1, wherein The displacement regulator (6) includes two symmetrically arranged connecting bars (61). Both of the two symmetrically arranged connecting bars (61) are slidably connected to the support frame (4). An installation frame (62) is fixedly connected between the two connecting bars (61). The camera (7) is connected to the installation frame (62). A servo motor (63) is fixedly connected to the upper end of the support frame (4), and an output end of the servo motor (63) is connected to a threaded rod (64) for driving the installation frame (62) to move in the vertical direction.

4. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 1, characterized in that, The transparent protection plate (5) is a transparent glass plate.

5. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 4, wherein, A brightening mechanism (8) for cleaning the transparent protection plate (5) is connected to the upper end of the support frame (4). The brightening mechanism (8) includes a mounting plate (81). The mounting plate (81) is fixedly connected to the upper end of the support frame (4). An electric telescopic rod (82) is fixedly connected to the mounting plate (81). A fixing frame (83) is fixedly connected to the telescopic end of the electric telescopic rod (82). The fixing frame (83) is slidably connected to the support frame (4). A scraping member is connected to the fixing frame (83), and the scraping member is in contact with the transparent protection plate (5).

6. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 5, characterized in that, The scraping member includes a movable plate (84). The movable plate (84) is slidably connected to the fixing frame (83). A wiping pad (85) is fixedly connected to the movable plate (84). The wiping pad (85) is in contact with the transparent protection plate (5). A spring (86) is fixedly connected to the movable plate (84), and one end of the spring (86) is fixedly connected to the fixing frame (83).

7. The experimental device for the dispersion effect of coal dust aggregates in a coalbed methane well according to claim 6, characterized in that, A plurality of springs (86) are provided and are equidistantly distributed along the length direction of the movable plate (84).

8. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 7, characterized in that, The wiping pad (85) is an elastic sponge pad.

9. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 1, characterized in that A storage cabinet (9) is fixedly connected to the upper end of the model base (1). A drawer (10) is inserted into the storage cabinet (9), and a handle is connected to the drawer (10).

10. The experimental device for the dispersion effect of coal powder aggregates in a coalbed methane well according to claim 9, wherein A collection box (11) is fixedly connected to the outside of the model base (1). A baffle (12) is fixedly connected to the upper end of the model base (1), and the baffle (12) is located between the crack (2) and the storage cabinet (9).

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