Coal rock powder grinding gas production and collection method

Abstract

The invention discloses a coal rock powder grinding gas production and collection method. The method comprises the following steps: S1, mounting a lower grinding concave rod and an upper grinding convex rod; s2, coal rock needing to be ground is placed in a grinding groove in the upper end of a lower grinding concave rod; s3, the upper portion of the lower grinding concave rod is sleeved with the lower portion of the gas collection unit; s4, the lifting supporting unit is started, and the upper grinding rod extends into the gas collection unit; s5, the temperature control unit is arranged outside the gas collection unit in a sleeving mode, and the middle clamping unit is started to clamp the temperature control unit and the gas collection unit; and S6, the grinding driving unit is started to conduct grinding operation, and the gas collecting unit collects generated gas. The coal rock grinding device is scientific in principle, simple in structure, easy to install and good in sealing performance, coal rock is ground in a sealed environment, meanwhile, temperature control in the grinding process is achieved, and therefore the accuracy of coal rock grinding test data is improved, gas generated in the coal rock grinding process can be collected, and a reference basis is provided for studying the abrasiveness of the coal rock.

Description

Technical Field

[0001] The invention belongs to the technical field of particle material grinding, and in particular relates to a method for producing gas and collecting gas by grinding coal rock powder. Background Art

[0002] Grinding is the process of grinding granular materials into powder by friction on the grinding tool. Grinding is also the finishing process of the machined surface through the relative movement of the grinding tool and the workpiece under a certain pressure. Grinding can be used for friction processing to process into powder, such as soft rock powder, coal powder, etc.

[0003] Coal rock type is usually used as the unit of division of coal seam stratification. It is divided into four categories according to the average gloss intensity of coal of the same metamorphic degree when observed with the naked eye. According to the average gloss intensity, it is divided into four categories: bright coal, semi-bright coal, semi-dark coal and dull coal.

[0004] In the process of grinding coal rock, gas will be generated, and it is necessary to collect the gas and test the gas composition in order to conduct in-depth research on the coal rock. The current grinding experiments are generally carried out in the air and there is no function to collect gas. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a coal rock powder grinding gas production and collection method which is easy to assemble and disassemble, has good sealing performance and is easy to operate.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a coal rock powder grinding gas production and gas collection method, which is implemented by a powder grinding and gas collection device, the powder grinding and gas collection device comprising a box frame, a lifting support unit, a grinding drive unit, an upper clamping unit, a lower clamping unit, an upper grinding convex rod, a lower grinding concave rod, a middle clamping unit, a gas collection unit and a temperature control unit are arranged in the box frame, the lower end of the lifting support unit is arranged at the bottom of the box frame, the upper end of the grinding drive unit is arranged at the top of the box frame, the lower part of the lower grinding concave rod is fastened to the upper part of the support lifting unit through the lower clamping unit, the upper part of the upper grinding convex rod is fastened to the lower part of the grinding drive unit through the upper clamping unit, the upper end surface of the lower grinding concave rod is provided with a grinding groove, the lower end of the upper grinding convex rod is provided with a grinding head extending into the grinding groove, the gas collection unit is sleeved and sealed on the lower outer circle of the upper grinding convex rod and the upper outer circle of the lower grinding concave rod, the temperature control unit is arranged outside the gas collection unit, and the middle clamping unit is arranged in the middle of the side wall of the box frame for clamping the temperature control unit and the gas collection unit; The method for producing gas by grinding coal rock powder comprises the following steps: S1, fasten the lower grinding concave rod to the upper part of the supporting lifting unit through the lower clamping unit, and fasten the upper grinding convex rod to the lower part of the grinding driving unit through the upper clamping unit; S2, placing the coal rock to be ground into the grinding groove at the upper end of the lower grinding concave rod; S3, insert the lower part of the gas collecting unit onto the upper part of the lower grinding concave rod; S4, start the lifting support unit, the lifting support unit drives the lower grinding concave rod, the gas collecting unit and the temperature control unit to move upward synchronously, during the upward movement, the upper grinding rod extends into the gas collecting unit, until the grinding head at the lower end of the upper grinding convex rod extends into the grinding groove and the coal rock to be ground reaches the set pressure, the lifting support unit stops rising; S5, putting the temperature control unit onto the outside of the gas collection unit, and then starting the clamping unit to clamp the temperature control unit and the gas collection unit; S6. Start the grinding drive unit, which drives the upper grinding lug to rotate. The grinding head at the lower end of the upper grinding lug grinds the coal rock in the grinding groove. The gas generated during the grinding process is collected by the gas collection unit, and the temperature control unit controls the temperature of the gas collection unit.

[0007] The lifting support unit includes at least two first electric push rods whose lower ends are fixedly arranged at the bottom of the box frame, a pressure sensor is arranged on the first electric push rod, a movable plate is arranged horizontally at the upper end of the first electric push rod, a lower positioning column is arranged vertically at the center of the movable plate, and the lower end of the lower grinding concave rod is coaxially connected with the upper end of the lower positioning column; The lower clamping unit comprises a first upper clamping ring, a first lower clamping ring and a first double-cone jacket; the first double-cone jacket is a sleeve structure which is thick in the middle, thin at both ends, and transparent from top to bottom; the first double-cone jacket is provided with a lower expansion joint along the axial direction; the first double-cone jacket is coaxially sleeved on the upper part of the lower positioning column and the lower part of the lower grinding concave rod; the first upper clamping ring is coaxially sleeved on the upper part of the first double-cone jacket; the first lower clamping ring is coaxially sleeved on the lower part of the first double-cone jacket; a plurality of clamps are provided between the first upper clamping ring and the first lower clamping ring; A first vertically arranged locking bolt is connected, the upper part of the first locking bolt passes through the first upper clamping ring from top to bottom, and the lower part of the first locking bolt is threadedly connected to the first lower clamping ring. Under the tightening connection action of the first locking bolt, the distance between the first upper clamping ring and the first lower clamping ring is shortened, the first upper clamping ring and the first lower clamping ring apply radial pressure to the first double-cone jacket, the lower expansion joint of the first double-cone jacket is reduced, and the upper and lower parts of the first double-cone jacket respectively clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning column.

[0008] The grinding drive unit includes a dynamic torque driver and an upper positioning column. The upper end of the dynamic torque driver is fixedly arranged on the top of the box frame. The upper end of the upper positioning column is fixedly connected to the driving end of the dynamic torque driver. The center lines of the upper positioning column and the lower positioning column coincide. The upper end of the upper grinding convex rod is coaxially connected to the lower end of the upper positioning column. The upper clamping unit includes a second upper clamping ring, a second lower clamping ring and a second double-cone clamping sleeve; the second double-cone clamping sleeve is a sleeve structure that is thick in the middle, thin at both the upper and lower ends, and penetrates through the upper and lower parts. The second double-cone clamping sleeve is axially provided with an upper expansion joint. The second double-cone clamping sleeve is coaxially sleeved on the lower part of the upper positioning post and the upper part of the upper grinding convex rod. The second upper clamping ring is coaxially sleeved on the upper part of the second double-cone clamping sleeve. The second lower clamping ring is coaxially sleeved on the lower part of the second double-cone clamping sleeve. The second upper clamping ring and the second lower clamping ring are connected by a number of vertically arranged second locking bolts. The lower part of the second locking bolt passes through the second lower clamping ring from bottom to top, and the upper part of the second locking bolt is threadedly connected to the second upper clamping ring. Under the action of the tight connection of the second locking bolt, the distance between the second upper clamping ring and the second lower clamping ring is shortened, and the second upper clamping ring and the second lower clamping ring apply radial pressure to the second double-cone clamping sleeve, and the upper expansion joint of the second double-cone clamping sleeve shrinks, and the upper and lower parts of the second double-cone clamping sleeve respectively clamp the outer circle of the upper positioning post and the outer circle of the upper grinding convex rod.

[0009] The gas collecting unit includes a sealing cylinder that penetrates through the upper and lower parts. An upper sealing ring that is hermetically matched with the outer circle of the upper grinding convex rod is provided on the upper part of the inner wall of the sealing cylinder. A lower sealing ring that is hermetically matched with the outer circle of the lower grinding concave rod is provided on the lower part of the inner wall of the sealing cylinder. An upper annular protective cover and a lower annular protective cover are respectively provided at the upper end and the lower end of the sealing cylinder. A gas collecting pipe is connected to the middle of the sealing cylinder. A control valve is provided on the gas collecting pipe. The outlet end of the gas collecting pipe is connected to a gas collecting bag; The temperature control unit includes a temperature controller and a temperature control belt. The temperature controller is connected to the temperature control belt through a wire. The temperature control belt is wrapped around the outer circle of the sealing cylinder and is detachably connected by a magic tape.

[0010] The middle clamping unit includes a left clamping device and a right clamping device that are symmetrically arranged on the left and right and have the same structure. The left clamping device includes a second electric push rod. The left end of the second electric push rod is fixedly connected to the left side wall of the box body frame. The right end of the second electric push rod is connected to a clamping block. The clamping block is provided with an arc-shaped clamping opening, and the arc-shaped clamping opening is crimped with the temperature control belt.

[0011] The specific process of fastening the lower ground concave rod to the upper part of the supporting lifting unit through the lower clamping unit in step S1 is as follows: first, the lower end of the lower ground concave rod is in contact with the upper end of the lower positioning column, and then the first double-cone jacket, the first upper clamping ring and the first lower clamping ring are downwardly mounted from the upper end of the lower ground concave rod, and when the lower half of the first double-cone jacket is sleeved on the outer circle of the lower positioning column, it stops moving downward, and the first upper clamping ring is downwardly penetrated into the first locking bolt, and the first locking bolt is screwed into the first lower clamping ring. The first locking bolt is tightened one by one to keep the first upper clamping ring and the first lower clamping ring level. Under the tightening connection action of the first locking bolt, the distance between the first upper clamping ring and the first lower clamping ring is shortened, and the first upper clamping ring and the first lower clamping ring apply radial pressure to the first double-cone jacket, and the lower expansion joint of the first double-cone jacket is reduced. The upper and lower parts of the first double-cone jacket respectively clamp the outer circle of the lower ground concave rod and the outer circle of the lower positioning column, so that the lower ground concave rod is fastened and connected to the lower positioning column as a whole; The specific process of fastening the upper grinding convex rod to the lower part of the grinding drive unit through the upper clamping unit in step S1 is as follows: first, the upper end of the upper grinding convex rod is in contact with the lower end of the upper positioning column, and then the second double-cone jacket, the second upper clamping ring and the second lower clamping ring are upwardly mounted from the lower end of the upper grinding convex rod, and when the upper half of the second double-cone jacket is sleeved on the outer circle of the upper positioning column, it stops moving upward, and the second lower clamping ring is passed upward through the second locking bolt, and the second locking bolt is screwed into the second upper clamping ring. The second locking bolt is tightened one by one to keep the second upper clamping ring and the second lower clamping ring level. Under the fastening connection action of the second locking bolt, the distance between the second upper clamping ring and the second lower clamping ring is shortened, and the second upper clamping ring and the second lower clamping ring apply radial pressure to the second double-cone jacket, and the upper expansion gap of the second double-cone jacket is reduced. The upper and lower parts of the second double-cone jacket respectively clamp the outer circle of the upper positioning column and the outer circle of the upper grinding convex rod, so that the upper grinding convex rod and the upper positioning column are fastened and connected as one.

[0012] The specific process of step S3 is: insert the sealing cylinder into the upper part of the lower grinding concave rod from top to bottom, and then connect the air collecting pipe and the air collecting bag through a quick plug connector; The specific process of step S5 is: wrap the temperature control belt around the outside of the sealing tube and stick it firmly with Velcro; then start the second electric push rods on the left and right sides, and the left and right clamping blocks move relatively, and the arc-shaped clamping openings of the clamping blocks clamp the temperature control belt and the sealing tube.

[0013] The specific process of step S4 is: start the first electric push rod, the first electric push rod extends, drives the movable plate to move upward, and the lower clamping unit, the gas collecting unit and the temperature control unit on the movable plate move upward together. During the upward movement, the upper grinding protrusion extends into the interior of the sealing tube, and the outer circle of the upper grinding protrusion is sealed with the upper sealing ring until the pressure sensor detects that the grinding head at the lower end of the upper grinding rod extends into the grinding groove and reaches the set pressure with the coal rock to be ground, and the first electric push rod stops extending.

[0014] The specific process of step S6 is: the dynamic torque driver drives the upper positioning column to rotate, the upper positioning column drives the upper grinding lug to rotate through the upper clamping unit, the grinding head at the lower end of the upper grinding lug grinds the coal rock in the grinding groove, and the gas generated during the grinding process is collected in the sealing cylinder by the gas collecting pipe into the gas collecting bag, and the temperature control unit adjusts and controls the temperature of the internal environment of the sealing cylinder during the grinding process.

[0015] By adopting the above technical scheme, the present invention has the following technical effects: the present application sets the sealing cylinder on the outside of the lower grinding concave rod and the upper grinding convex rod, and through the sealing of the upper sealing ring and the lower sealing ring, the gas generated by the upper grinding convex rod during the rotating grinding of coal rock can be collected into the gas collecting bag through the gas collecting pipe, and a temperature control belt is set on the outside of the sealing cylinder to control the temperature of the gas production environment of the grinding coal rock. The lower grinding concave rod is fastened and connected as a whole with the lower positioning column of the lifting support unit through the lower clamping unit, and the upper grinding convex rod is fastened and connected as a whole with the upper positioning column of the grinding drive unit through the upper clamping unit; the upper clamping unit and the lower clamping unit both adopt the method of applying the axial force of the locking bolt to tighten the double cone jacket through the clamping ring, and the clamping connection is realized after the expansion joint on the double cone jacket becomes smaller. This structure is convenient to assemble, easy to disassemble, and reusable. The temperature control belt is wrapped around the outer circle of the sealing cylinder by Velcro, and the sealing cylinder is clamped by the middle clamping unit to avoid driving the sealing cylinder to rotate during the rotation of the upper grinding convex rod.

[0016] To sum up, the present invention has a scientific principle, a simple structure, is easy to install, and has good sealing performance. The coal rock is ground in a sealed environment, and temperature control of the grinding process is achieved at the same time, thereby improving the accuracy of the coal rock grinding test data. The gas generated during the coal rock grinding process can also be collected, thereby providing a reference basis for studying the abrasiveness of the coal rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the powder grinding and gas collecting device in the present invention; Figure 2 It is a structural schematic diagram of the lifting support unit, the grinding drive unit and the middle clamping unit; Figure 3 It is a schematic diagram of the exploded structure of the upper clamping unit, the lower clamping unit, the upper grinding convex rod and the lower grinding concave rod; Figure 4 It is a schematic diagram of the explosion structure of the gas collection unit; Figure 5 It is a structural schematic diagram of the temperature control unit. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 5As shown, a coal rock powder grinding gas production and gas collection method is implemented by a powder grinding and gas collection device, which includes a box frame 1, in which a lifting support unit 2, a grinding drive unit 3, an upper clamping unit 4, a lower clamping unit 5, an upper grinding convex rod 6, a lower grinding concave rod 7, a middle clamping unit 8, a gas collection unit 9 and a temperature control unit 10 are arranged. The lower end of the lifting support unit 2 is arranged at the bottom of the box frame 1, the upper end of the grinding drive unit 3 is arranged at the top of the box frame 1, and the lower part of the lower grinding concave rod 7 is clamped by the lower clamping unit 8. The tightening unit 5 is fastened to the upper part of the supporting lifting unit, the upper part of the upper grinding convex rod 6 is fastened to the lower part of the grinding driving unit 3 through the upper clamping unit 4, the upper end surface of the lower grinding concave rod 7 is provided with a grinding groove 11, and the lower end of the upper grinding convex rod 6 is provided with a grinding head 12 extending into the grinding groove 11, the gas collecting unit 9 is sleeved and sealed on the lower outer circle of the upper grinding convex rod 6 and the upper outer circle of the lower grinding concave rod 7, the temperature control unit 10 is arranged outside the gas collecting unit 9, and the middle clamping unit 8 is arranged in the middle of the side wall of the box frame 1 for clamping the temperature control unit 10 and the gas collecting unit 9; The method for producing gas by grinding coal rock powder comprises the following steps: S1, fasten the lower grinding concave rod 7 to the upper part of the supporting lifting unit through the lower clamping unit 5, and fasten the upper grinding convex rod 6 to the lower part of the grinding driving unit 3 through the upper clamping unit 4; S2, placing the coal rock to be ground into the grinding groove 11 at the upper end of the lower grinding concave rod 7; S3, insert the lower part of the gas collecting unit 9 onto the upper part of the lower grinding concave rod 7; S4, start the lifting support unit 2, the lifting support unit 2 drives the lower grinding concave rod 7, the gas collecting unit 9 and the temperature control unit 10 to move upward synchronously. During the upward movement, the upper grinding rod extends into the gas collecting unit 9 until the grinding head 12 at the lower end of the upper grinding convex rod 6 extends into the grinding groove 11 and reaches the set pressure with the coal rock to be ground, and then the lifting support unit 2 stops rising; S5, putting the temperature control unit 10 onto the outside of the gas collecting unit 9, and then starting the clamping unit 8 to clamp the temperature control unit 10 and the gas collecting unit 9; S6. Start the grinding drive unit 3, which drives the upper grinding protrusion 6 to rotate. The grinding head 12 at the lower end of the upper grinding protrusion 6 grinds the coal rock in the grinding groove 11. The gas generated during the grinding process is collected by the gas collecting unit 9, and the temperature control unit 10 controls the temperature of the gas collecting unit 9.

[0019] The lifting support unit 2 includes at least two first electric push rods 13 whose lower ends are fixedly arranged at the bottom of the box frame 1, and a pressure sensor is arranged on the first electric push rod 13. A moving plate 14 is arranged horizontally at the upper end of the first electric push rod 13, and a lower positioning column 15 is arranged vertically at the center of the moving plate 14. The lower end of the lower grinding concave rod 7 is coaxially connected with the upper end of the lower positioning column 15. The lower clamping unit 5 includes a first upper clamping ring 16, a first lower clamping ring 17 and a first double-cone jacket 18; the first double-cone jacket 18 is a sleeve structure with a thick middle, thin ends, and a transparent structure. The first double-cone jacket 18 is provided with a lower expansion joint 19 along the axial direction. The first double-cone jacket 18 is coaxially sleeved on the upper part of the lower positioning column 15 and the lower part of the lower grinding concave rod 7. The first upper clamping ring 16 is coaxially sleeved on the upper part of the first double-cone jacket 18, and the first lower clamping ring 17 is coaxially sleeved on the lower part of the first double-cone jacket 18. There are several The first double-cone jacket 18 is connected with the first double-cone jacket 18 by a vertically arranged first locking bolt 20, the upper part of the first locking bolt 20 passes through the first upper clamping ring 16 from top to bottom, and the lower part of the first locking bolt 20 is threadedly connected to the first lower clamping ring 17. Under the tightening connection action of the first locking bolt 20, the distance between the first upper clamping ring 16 and the first lower clamping ring 17 is shortened, the first upper clamping ring 16 and the first lower clamping ring 17 apply radial pressure to the first double-cone jacket 18, the lower expansion joint 19 of the first double-cone jacket 18 is reduced, and the upper and lower parts of the first double-cone jacket 18 clamp the outer circle of the lower grinding concave rod 7 and the outer circle of the lower positioning column 15 respectively.

[0020] The grinding drive unit 3 includes a dynamic torque driver 21 (using a motor) and an upper positioning column 22. The upper end of the dynamic torque driver 21 is fixedly arranged on the top of the box frame 1. The upper end of the upper positioning column 22 is fixedly connected to the driving end of the dynamic torque driver 21. The center line of the upper positioning column 22 coincides with the center line of the lower positioning column 15. The upper end of the upper grinding protruding rod 6 is coaxially connected to the lower end of the upper positioning column 22. The upper clamping unit 4 includes a second upper clamping ring 23, a second lower clamping ring 24 and a second double-cone jacket 25; the second double-cone jacket 25 is a sleeve structure with a thick middle, thin upper and lower ends, and transparent from top to bottom. The second double-cone jacket 25 is provided with an upper expansion joint 26 along the axial direction. The second double-cone jacket 25 is coaxially sleeved on the lower part of the upper positioning column 22 and the upper part of the upper grinding convex rod 6. The second upper clamping ring 23 is coaxially sleeved on the upper part of the second double-cone jacket 25, and the second lower clamping ring 24 is coaxially sleeved on the lower part of the second double-cone jacket 25. There are several The second double-cone jacket 25 is connected by a second vertically arranged locking bolt 37, the lower part of the second locking bolt 37 passes through the second lower clamping ring 24 from bottom to top, and the upper part of the second locking bolt 37 is threadedly connected to the second upper clamping ring 23. Under the tightening connection action of the second locking bolt 37, the distance between the second upper clamping ring 23 and the second lower clamping ring 24 is shortened, and the second upper clamping ring 23 and the second lower clamping ring 24 apply radial pressure to the second double-cone jacket 25, the upper expansion joint 26 of the second double-cone jacket 25 is reduced, and the upper and lower parts of the second double-cone jacket 25 clamp the outer circle of the upper positioning column 22 and the outer circle of the upper grinding protrusion 6 respectively.

[0021] The gas collecting unit 9 includes a sealing cylinder 27 which is transparent from top to bottom. An upper sealing ring 38 which is sealed with the outer circle of the upper grinding convex rod 6 is provided on the upper inner wall of the sealing cylinder 27. A lower sealing ring which is sealed with the outer circle of the lower grinding concave rod 7 is provided on the lower inner wall of the sealing cylinder 27. An upper annular protective cover 28 and a lower annular protective cover 29 are provided at the upper and lower ends of the sealing cylinder 27, respectively. A gas collecting pipe 30 is connected to the middle of the sealing cylinder 27. A control valve 31 is provided on the gas collecting pipe 30. A gas collecting bag 32 is connected to the outlet end of the gas collecting pipe 30. The temperature control unit 10 includes a temperature controller 33 and a temperature control belt 34 . The temperature controller 33 is connected to the temperature control belt 34 via a wire. The temperature control belt 34 is wrapped around the outer circumference of the sealing tube 27 and is detachably connected via a Velcro 39 .

[0022] The middle clamping unit 8 includes a left clamp and a right clamp which are symmetrically arranged and have the same structure. The left clamp includes a second electric push rod 35. The left end of the second electric push rod 35 is fixedly connected to the left side wall of the box frame 1. The right end of the second electric push rod 35 is connected to a clamping block 36. The clamping block 36 is provided with an arc-shaped clamping opening, which is crimped with the temperature control belt 34.

[0023] The specific process of fastening the lower ground concave rod 7 to the upper part of the supporting lifting unit through the lower clamping unit 5 in step S1 is as follows: first, the lower end of the lower ground concave rod 7 is brought into contact with the upper end of the lower positioning column 15, and then the first double-cone jacket 18, the first upper clamping ring 16 and the first lower clamping ring 17 are downwardly mounted from the upper end of the lower ground concave rod 7, and when the lower half of the first double-cone jacket 18 is mounted on the outer circle of the lower positioning column 15, it stops moving downward, and the first upper clamping ring 16 is downwardly inserted into the first locking bolt 20, and the first locking bolt 20 is screwed into the inside of the first lower clamping ring 17, and the first locking bolts 20 are tightened one by one. Tighten the bolt 20 to keep the first upper clamping ring 16 and the first lower clamping ring 17 level. Under the tightening connection of the first locking bolt 20, the distance between the first upper clamping ring 16 and the first lower clamping ring 17 is shortened, and the first upper clamping ring 16 and the first lower clamping ring 17 apply radial pressure to the first double-cone jacket 18, and the lower expansion joint 19 of the first double-cone jacket 18 is reduced. The upper and lower parts of the first double-cone jacket 18 clamp the outer circle of the lower ground concave rod 7 and the outer circle of the lower positioning column 15 respectively, so that the lower ground concave rod 7 and the lower positioning column 15 are fastened and connected as a whole; The specific process of fastening the upper grinding convex rod 6 to the lower part of the grinding drive unit 3 through the upper clamping unit 4 in step S1 is as follows: first, the upper end of the upper grinding convex rod 6 is brought into contact with the lower end of the upper positioning column 22, and then the second double-cone jacket 25, the second upper clamping ring 23 and the second lower clamping ring 24 are upwardly mounted from the lower end of the upper grinding convex rod 6, and when the upper half of the second double-cone jacket 25 is mounted on the outer circle of the upper positioning column 22, it stops moving upward, and the second lower clamping ring 24 is upwardly inserted into the second locking bolt 37, and the second locking bolt 37 is screwed into the second upper clamping ring 23, and the second locking bolts 37 are tightened one by one. The locking bolt 37 keeps the second upper clamping ring 23 and the second lower clamping ring 24 level. Under the tightening connection action of the second locking bolt 37, the distance between the second upper clamping ring 23 and the second lower clamping ring 24 is shortened, and the second upper clamping ring 23 and the second lower clamping ring 24 apply radial pressure to the second double-conical jacket 25. The upper expansion joint 26 of the second double-conical jacket 25 is reduced, and the upper and lower parts of the second double-conical jacket 25 clamp the outer circle of the upper positioning column 22 and the outer circle of the upper grinding protrusion 6 respectively, so that the upper grinding protrusion 6 and the upper positioning column 22 are fastened and connected as a whole.

[0024] The specific process of step S3 is: insert the sealing cylinder 27 into the upper part of the lower grinding concave rod 7 from top to bottom, and then connect the air collecting pipe 30 and the air collecting bag 32 through a quick plug connector; The specific process of step S5 is: wrap the temperature control belt 34 around the outside of the sealing tube 27 and firmly stick it with Velcro 39; then start the second electric push rods 35 on the left and right sides, and the left and right clamping blocks 36 move relatively, and the arc-shaped clamping openings of the clamping blocks 36 clamp the temperature control belt 34 and the sealing tube 27.

[0025] The specific process of step S4 is: start the first electric push rod 13, the first electric push rod 13 extends, drives the movable disk 14 to move upward, and the lower clamping unit 5, the gas collecting unit 9 and the temperature control unit 10 on the movable disk 14 move upward together. During the upward movement, the upper grinding protrusion 6 extends into the interior of the sealing tube 27, and the outer circle of the upper grinding protrusion 6 is sealed with the upper sealing ring 38. Until the pressure sensor detects that the grinding head 12 at the lower end of the upper grinding rod extends into the grinding groove 11 and reaches the set pressure with the coal rock to be ground, the first electric push rod 13 stops extending.

[0026] The specific process of step S6 is: the dynamic torque driver 21 drives the upper positioning column 22 to rotate, the upper positioning column 22 drives the upper grinding protrusion 6 to rotate through the upper clamping unit 4, and the grinding head 12 at the lower end of the upper grinding protrusion 6 grinds the coal rock in the grinding groove 11. The gas generated during the grinding process is collected by the gas collecting pipe 30 in the sealing tube 27 into the gas collecting bag 32. During the grinding process, the temperature control unit 10 adjusts and controls the temperature of the internal environment of the sealing tube 27.

[0027] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for producing gas by grinding coal rock powder, characterized in that: The powder grinding and gas collecting device is adopted for implementation, and the powder grinding and gas collecting device comprises a box frame, in which a lifting support unit, a grinding drive unit, an upper clamping unit, a lower clamping unit, an upper grinding convex rod, a lower grinding concave rod, a middle clamping unit, a gas collecting unit and a temperature control unit are arranged, the lower end of the lifting support unit is arranged at the bottom of the box frame, the upper end of the grinding drive unit is arranged at the top of the box frame, the lower part of the lower grinding concave rod is fastened to the upper part of the support lifting unit through the lower clamping unit, the upper part of the upper grinding convex rod is fastened to the lower part of the grinding drive unit through the upper clamping unit, the upper end surface of the lower grinding concave rod is provided with a grinding groove, the lower end of the upper grinding convex rod is provided with a grinding head extending into the grinding groove, the gas collecting unit is sleeved and sealed on the lower outer circle of the upper grinding convex rod and the upper outer circle of the lower grinding concave rod, the temperature control unit is arranged outside the gas collecting unit, and the middle clamping unit is arranged in the middle of the side wall of the box frame for clamping the temperature control unit and the gas collecting unit; The method for producing gas by grinding coal rock powder comprises the following steps: S1, fasten the lower grinding concave rod to the upper part of the supporting lifting unit through the lower clamping unit, and fasten the upper grinding convex rod to the lower part of the grinding driving unit through the upper clamping unit; S2, placing the coal rock to be ground into the grinding groove at the upper end of the lower grinding concave rod; S3, insert the lower part of the gas collecting unit onto the upper part of the lower grinding concave rod; S4, start the lifting support unit, the lifting support unit drives the lower grinding concave rod, the gas collecting unit and the temperature control unit to move upward synchronously, during the upward movement, the upper grinding rod extends into the gas collecting unit, until the grinding head at the lower end of the upper grinding convex rod extends into the grinding groove and the coal rock to be ground reaches the set pressure, the lifting support unit stops rising; S5, putting the temperature control unit onto the outside of the gas collection unit, and then starting the clamping unit to clamp the temperature control unit and the gas collection unit; S6. Start the grinding drive unit, which drives the upper grinding lug to rotate. The grinding head at the lower end of the upper grinding lug grinds the coal rock in the grinding groove. The gas generated during the grinding process is collected by the gas collection unit, and the temperature control unit controls the temperature of the gas collection unit.

2. A method for producing gas by grinding coal rock powder according to claim 1, characterized in that: The lifting support unit includes at least two first electric push rods whose lower ends are fixedly arranged at the bottom of the box frame, a pressure sensor is arranged on the first electric push rod, a movable plate is arranged horizontally at the upper end of the first electric push rod, a lower positioning column is arranged vertically at the center of the movable plate, and the lower end of the lower grinding concave rod is coaxially connected with the upper end of the lower positioning column; The lower clamping unit comprises a first upper clamping ring, a first lower clamping ring and a first double-cone jacket; the first double-cone jacket is a sleeve structure which is thick in the middle, thin at both ends, and transparent from top to bottom; the first double-cone jacket is provided with a lower expansion joint along the axial direction; the first double-cone jacket is coaxially sleeved on the upper part of the lower positioning column and the lower part of the lower grinding concave rod; the first upper clamping ring is coaxially sleeved on the upper part of the first double-cone jacket; the first lower clamping ring is coaxially sleeved on the lower part of the first double-cone jacket; a plurality of clamps are provided between the first upper clamping ring and the first lower clamping ring; A first vertically arranged locking bolt is connected, the upper part of the first locking bolt passes through the first upper clamping ring from top to bottom, and the lower part of the first locking bolt is threadedly connected to the first lower clamping ring. Under the tightening connection action of the first locking bolt, the distance between the first upper clamping ring and the first lower clamping ring is shortened, the first upper clamping ring and the first lower clamping ring apply radial pressure to the first double-cone jacket, the lower expansion joint of the first double-cone jacket is reduced, and the upper and lower parts of the first double-cone jacket respectively clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning column.

3. A method for producing gas by grinding coal rock powder according to claim 2, characterized in that: The grinding drive unit includes a dynamic torque driver and an upper positioning column. The upper end of the dynamic torque driver is fixedly arranged on the top of the box frame. The upper end of the upper positioning column is fixedly connected to the driving end of the dynamic torque driver. The center lines of the upper positioning column and the lower positioning column coincide. The upper end of the upper grinding convex rod is coaxially connected to the lower end of the upper positioning column. The upper clamping unit comprises a second upper clamping ring, a second lower clamping ring and a second double-cone jacket; the second double-cone jacket is a sleeve structure which is thick in the middle, thin at both ends, and transparent from top to bottom; the second double-cone jacket is provided with an upper expansion joint along the axial direction; the second double-cone jacket is coaxially sleeved on the lower part of the upper positioning column and the upper part of the upper grinding convex rod; the second upper clamping ring is coaxially sleeved on the upper part of the second double-cone jacket; the second lower clamping ring is coaxially sleeved on the lower part of the second double-cone jacket; a plurality of clamps are provided between the second upper clamping ring and the second lower clamping ring; The second double-cone jacket is connected by a second vertically arranged locking bolt, the lower part of the second locking bolt passes through the second lower clamping ring from bottom to top, and the upper part of the second locking bolt is threadedly connected to the second upper clamping ring. Under the tightening connection action of the second locking bolt, the distance between the second upper clamping ring and the second lower clamping ring is shortened, the second upper clamping ring and the second lower clamping ring apply radial pressure to the second double-cone jacket, the lower expansion joint of the second double-cone jacket is reduced, and the upper and lower parts of the second double-cone jacket respectively clamp the outer circle of the upper positioning column and the outer circle of the upper grinding convex rod.

4. A method for producing gas by grinding coal rock powder according to claim 3, characterized in that: The gas collecting unit includes a sealing cylinder which is transparent from top to bottom. An upper sealing ring which is sealed with the outer circle of an upper ground convex rod is provided on the upper inner wall of the sealing cylinder. A lower sealing ring which is sealed with the outer circle of a lower ground concave rod is provided on the lower inner wall of the sealing cylinder. An upper annular protective cover and a lower annular protective cover are provided at the upper and lower ends of the sealing cylinder respectively. A gas collecting pipe is connected to the middle of the sealing cylinder. A control valve is provided on the gas collecting pipe. An outlet end of the gas collecting pipe is connected to a gas collecting bag.

5. A method for producing gas by grinding coal rock powder according to claim 4, characterized in that: The temperature control unit includes a temperature controller and a temperature control belt. The temperature controller is connected to the temperature control belt through a wire. The temperature control belt is wrapped around the outer circle of the sealing cylinder and is detachably connected through Velcro.

6. A method for producing gas by grinding coal rock powder according to claim 5, characterized in that: The middle clamping unit includes a left clamp and a right clamp which are symmetrically arranged and have the same structure. The left clamp includes a second electric push rod. The left end of the second electric push rod is fixedly connected to the left side wall of the box frame. The right end of the second electric push rod is connected to a clamping block. The clamping block is provided with an arc-shaped clamping opening, which is crimped to the temperature control belt.

7. A method for producing gas by grinding coal rock powder according to claim 6, characterized in that: The specific process of fastening the lower ground concave rod to the upper part of the supporting lifting unit through the lower clamping unit in step S1 is as follows: first, the lower end of the lower ground concave rod is in contact with the upper end of the lower positioning column, and then the first double-cone jacket, the first upper clamping ring and the first lower clamping ring are downwardly mounted from the upper end of the lower ground concave rod, and when the lower half of the first double-cone jacket is sleeved on the outer circle of the lower positioning column, it stops moving downward, and the first upper clamping ring is downwardly penetrated into the first locking bolt, and the first locking bolt is screwed into the first lower clamping ring. The first locking bolt is tightened one by one to keep the first upper clamping ring and the first lower clamping ring level. Under the tightening connection action of the first locking bolt, the distance between the first upper clamping ring and the first lower clamping ring is shortened, and the first upper clamping ring and the first lower clamping ring apply radial pressure to the first double-cone jacket, and the lower expansion joint of the first double-cone jacket is reduced. The upper and lower parts of the first double-cone jacket respectively clamp the outer circle of the lower ground concave rod and the outer circle of the lower positioning column, so that the lower ground concave rod is fastened and connected to the lower positioning column as a whole; The specific process of fastening the upper grinding convex rod to the lower part of the grinding drive unit through the upper clamping unit in step S1 is as follows: first, the upper end of the upper grinding convex rod is in contact with the lower end of the upper positioning column, and then the second double-cone jacket, the second upper clamping ring and the second lower clamping ring are upwardly mounted from the lower end of the upper grinding convex rod, and when the upper half of the second double-cone jacket is sleeved on the outer circle of the upper positioning column, it stops moving upward, and the second lower clamping ring is passed upward through the second locking bolt, and the second locking bolt is screwed into the second upper clamping ring. The second locking bolt is tightened one by one to keep the second upper clamping ring and the second lower clamping ring level. Under the fastening connection action of the second locking bolt, the distance between the second upper clamping ring and the second lower clamping ring is shortened, and the second upper clamping ring and the second lower clamping ring apply radial pressure to the second double-cone jacket, and the upper expansion gap of the second double-cone jacket is reduced. The upper and lower parts of the second double-cone jacket respectively clamp the outer circle of the upper positioning column and the outer circle of the upper grinding convex rod, so that the upper grinding convex rod and the upper positioning column are fastened and connected as one.

8. A method for producing gas by grinding coal rock powder according to claim 7, characterized in that: The specific process of step S3 is: insert the sealing cylinder into the upper part of the lower grinding concave rod from top to bottom, and then connect the air collecting pipe and the air collecting bag through a quick plug connector; The specific process of step S5 is: wrap the temperature control belt around the outside of the sealing tube and stick it firmly with Velcro; then start the second electric push rods on the left and right sides, and the left and right clamping blocks move relatively, and the arc-shaped clamping openings of the clamping blocks clamp the temperature control belt and the sealing tube.

9. A method for producing gas and collecting gas by grinding coal rock powder according to claim 8, characterized in that: The specific process of step S4 is: start the first electric push rod, the first electric push rod extends, drives the movable plate to move upward, and the lower clamping unit, the gas collecting unit and the temperature control unit on the movable plate move upward together. During the upward movement, the upper grinding protrusion extends into the interior of the sealing tube, and the outer circle of the upper grinding protrusion is sealed with the upper sealing ring until the pressure sensor detects that the grinding head at the lower end of the upper grinding rod extends into the grinding groove and reaches the set pressure with the coal rock to be ground, and the first electric push rod stops extending.

10. A method for producing gas by grinding coal rock powder according to claim 9, characterized in that: The specific process of step S6 is: the dynamic torque driver drives the upper positioning column to rotate, the upper positioning column drives the upper grinding lug to rotate through the upper clamping unit, the grinding head at the lower end of the upper grinding lug grinds the coal rock in the grinding groove, and the gas generated during the grinding process is collected in the sealing cylinder by the gas collecting pipe into the gas collecting bag, and the temperature control unit adjusts and controls the temperature of the internal environment of the sealing cylinder during the grinding process.

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