Coal rock powder grinding gas production and collection method

Abstract

The application discloses a coal rock powder grinding gas production and collection method, which comprises the following steps: S1, installing a lower grinding concave rod and an upper grinding convex rod; S2, placing the coal rock to be ground into a grinding groove at the upper end of the lower grinding concave rod; S3, sleeving a gas collection unit lower part onto the upper part of the lower grinding concave rod; S4, starting a lifting support unit, and extending the upper grinding rod into the gas collection unit; S5, sleeving a temperature control unit onto the outside of the gas collection unit, and starting a middle clamping unit to clamp the temperature control unit and the gas collection unit; and S6, starting a grinding driving unit to perform grinding operation, and collecting the generated gas by the gas collection unit. The application has the advantages of scientific principle, simple structure, easy installation, good sealing performance, and the like. The coal rock is ground in a sealed environment, and the temperature control of the grinding process is realized, so that the accuracy of the coal rock grinding test data is improved, the generated gas during the grinding process of the coal rock can be collected, and reference basis is provided for the study on the grindability of the coal rock.

Description

Technical Field

[0001] This invention belongs to the field of particle grinding technology, specifically, it relates to a method for gas generation and collection through coal and rock powder grinding. Background Technology

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

[0003] Coal petrography is usually used as a unit for dividing coal seams. It is a classification based on the average luster intensity of coal of the same metamorphic degree when observed with the naked eye. According to the average luster intensity, it is divided into four categories: bright coal, semi-bright coal, semi-dull coal, and dull coal.

[0004] During the grinding process of coal and rock, gas is generated. It is necessary to collect the gas and test its composition in order to conduct in-depth research on the coal and rock. Currently, grinding experiments are generally carried out in the air and do not have the function of collecting gas. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this invention is to provide a method for gas generation and collection through coal and rock powder grinding that is easy to assemble and disassemble, has good sealing properties, and is easy to operate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for gas generation and collection through coal and rock powder grinding, implemented using a powder grinding gas collection device, the powder grinding gas collection device including a box frame, the box frame being provided with 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; the lower end of the lifting support unit is located at the bottom of the box frame, the upper end of the grinding drive unit is located at the top of the box frame, the lower part of the lower grinding concave rod is fastened to the upper part of the lifting support unit by the lower clamping unit, the upper part of the upper grinding convex rod is fastened to the lower part of the grinding drive unit by the upper clamping unit, the upper end face 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 located outside the gas collection unit, and the middle clamping unit is located 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 and collecting gas by grinding coal and rock powder includes the following steps: S1. Secure the lower grinding concave rod to the upper part of the support lifting unit through the lower clamping unit, and secure the upper grinding convex rod to the lower part of the grinding drive unit through the upper clamping unit. S2. Place the coal or rock to be ground into the grinding groove at the upper end of the lower grinding concave rod; S3. Fit the lower part of the gas collection 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 collection unit and the temperature control unit to move upward synchronously. During the upward movement, the upper grinding rod extends into the gas collection unit until the grinding head at the lower end of the upper grinding convex rod extends into the grinding groove and reaches the set pressure with the coal and rock to be ground. Then the lifting support unit stops rising. S5. Fit the temperature control unit onto the outside of the gas collection unit, and then start the clamping unit to clamp the temperature control unit and the gas collection unit; S6. Start the grinding drive unit. The grinding drive unit drives the upper grinding cam to rotate. The grinding head at the lower end of the upper grinding cam grinds the coal and 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 fixed at the bottom of the box frame. Each first electric push rod is equipped with a pressure sensor. The upper end of the first electric push rod is horizontally equipped with a moving disk. The center of the moving disk is vertically equipped with a lower positioning column. 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 includes a first upper clamping ring, a first lower clamping ring, and a first double-cone sleeve. The first double-cone sleeve is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. A lower expansion joint is formed along the axial direction of the first double-cone sleeve. The first double-cone sleeve is coaxially fitted onto the upper part of the lower positioning post and the lower part of the lower grinding concave rod. The first upper clamping ring is coaxially fitted onto the upper part of the first double-cone sleeve, and the first lower clamping ring is coaxially fitted onto the lower part of the first double-cone sleeve. Several... A first locking bolt is vertically positioned, with its upper part passing through the first upper clamping ring from top to bottom. The lower part of the first locking bolt is threadedly connected to the first lower clamping ring. Under the tightening 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 sleeve, reducing the lower expansion joint of the first double-cone sleeve. The upper and lower parts of the first double-cone sleeve respectively clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning post.

[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 mounted on the top of the housing frame. The upper end of the upper positioning column is fixedly connected to the drive 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 protrusion 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 sleeve. The second double-cone sleeve is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. An upper expansion joint is formed along the axial direction of the second double-cone sleeve. The second double-cone sleeve is coaxially fitted onto the lower part of the upper positioning post and the upper part of the upper grinding protrusion. The second upper clamping ring is coaxially fitted onto the upper part of the second double-cone sleeve, and the second lower clamping ring is coaxially fitted onto the lower part of the second double-cone sleeve. Several... A second locking bolt is vertically positioned, with its lower part passing through the second lower clamping ring from bottom to top. The upper part of the second locking bolt is threaded to the second upper clamping ring. Under the tightening 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 sleeve, reducing the upper expansion joint of the second double-cone sleeve. The upper and lower parts of the second double-cone sleeve respectively clamp the outer circle of the upper positioning post and the outer circle of the upper grinding protrusion.

[0009] The gas collection unit includes a sealing cylinder that is open at the top and bottom. The upper part of the inner wall of the sealing cylinder is provided with an upper sealing ring that seals with the outer circle of the upper grinding protrusion, and the lower part of the inner wall of the sealing cylinder is provided with a lower sealing ring that seals with the outer circle of the lower grinding concave rod. The upper and lower ends of the sealing cylinder are respectively provided with an upper annular protective cover and a lower annular protective cover. A gas collection pipe is connected to the middle of the sealing cylinder. A control valve is provided on the gas collection pipe, and a gas collection bag is connected to the outlet end of the gas collection pipe. The temperature control unit includes a temperature controller and a temperature control strip. The temperature controller is connected to the temperature control strip via a wire. The temperature control strip is wrapped around the outer circumference of the sealed cylinder and can be detachably connected via Velcro.

[0010] The clamping unit includes a left clamp and a right clamp that 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 has an arc-shaped clamping opening, which is pressed against the temperature control belt.

[0011] The specific process of fastening the lower grinding concave rod to the upper part of the support lifting unit in step S1 is as follows: First, the lower end of the lower grinding concave rod contacts the upper end of the lower positioning post. Then, the first double-cone sleeve, the first upper clamping ring, and the first lower clamping ring are fitted downward from the upper end of the lower grinding concave rod. When the lower half of the first double-cone sleeve is fitted to the outer circle of the lower positioning post, the downward movement stops. The first locking bolt is inserted downward from the first upper clamping ring. The first locking bolt is screwed into the inside of the first lower clamping ring. The first locking bolts are tightened one by one to keep the first upper clamping ring and the first lower clamping ring horizontal. Under the fastening connection 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 sleeve. The lower expansion joint of the first double-cone sleeve is reduced. The upper and lower parts of the first double-cone sleeve clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning post, respectively. In this way, the lower grinding concave rod and the lower positioning post are fastened together as one unit. The specific process of fastening the upper grinding protrusion to the lower part of the grinding drive unit in step S1 is as follows: First, the upper end of the upper grinding protrusion contacts the lower end of the upper positioning post. Then, the second double-cone sleeve, the second upper clamping ring, and the second lower clamping ring are fitted upward from the lower end of the upper grinding protrusion. When the upper half of the second double-cone sleeve is fitted onto the outer circle of the upper positioning post, the upward movement stops. The second locking bolt is inserted upward through the second lower clamping ring. The second locking bolt is screwed into the interior of the second upper clamping ring. The second locking bolts are tightened one by one to keep the second upper clamping ring and the second lower clamping ring horizontal. Under the fastening connection 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 sleeve. The upper expansion joint of the second double-cone sleeve is reduced. The upper and lower parts of the second double-cone sleeve clamp the outer circle of the upper positioning post and the outer circle of the upper grinding protrusion, respectively. In this way, the upper grinding protrusion and the upper positioning post are fastened together as one unit.

[0012] The specific process of step S3 is as follows: insert the sealing cylinder into the upper part of the lower grinding concave rod from top to bottom, and then connect the gas collection pipe and the gas collection bag through the quick-connect coupling; Step S5 is as follows: Wrap the temperature control tape around the outside of the sealing cylinder and secure it with Velcro; then activate the second electric push rods on both sides, and the two clamping blocks on the left and right sides move relative to each other, clamping the temperature control tape and the sealing cylinder with their arc-shaped clamping jaws.

[0013] Step S4 is as follows: The first electric push rod is started and extends, driving the moving disk to move upward. The lower clamping unit, gas collection unit and temperature control unit on the moving disk move upward together. During the upward movement, the upper grinding protrusion extends into the sealing cylinder. The outer circle of the upper grinding protrusion is sealed and fitted with the upper sealing ring until the pressure sensor detects that the grinding head at the lower end of the upper grinding rod has extended into the grinding groove and reached the set pressure with the coal and rock to be ground. Then the first electric push rod stops extending.

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

[0015] By adopting the above technical solution, the present invention has the following technical effects: The sealing sleeve is fitted outside the lower grinding concave rod and the upper grinding convex rod, and sealed by the upper and lower sealing rings. The gas generated during the rotational grinding of coal and rock by the upper grinding convex rod can be collected into a gas collection bag through a gas collecting pipe. A temperature control belt is installed outside the sealing sleeve to regulate the temperature of the gas-generating environment during coal and rock grinding. The lower grinding concave rod is securely connected to the lower positioning column of the lifting support unit via a lower clamping unit, and the upper grinding convex rod is securely connected to the upper positioning column of the grinding drive unit via an upper clamping unit. Both the upper and lower clamping units employ an axial force applied by locking bolts to clamp the double-cone sleeve through clamping rings. The clamping connection is achieved by reducing the expansion joint on the double-cone sleeve. This structure is convenient to assemble, easy to disassemble, and reusable. The temperature control belt is wrapped around the outer circumference of the sealing sleeve with Velcro, and the sealing sleeve is clamped by a middle clamping unit, preventing the sealing sleeve from rotating during the rotation of the upper grinding convex rod.

[0016] In summary, this invention is scientifically sound, simple in structure, easy to install, and has good sealing properties. Coal and rock are ground in a sealed environment, and the temperature of the grinding process is controlled simultaneously, thereby improving the accuracy of coal and rock grinding test data. The gas generated during the coal and rock grinding process can also be collected, thus providing a reference for studying the grindability of coal and rock. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the powder grinding gas collection device in this invention; Figure 2 This is a structural diagram of the lifting support unit, the grinding drive unit, and the middle clamping unit; Figure 3 This is an exploded structural diagram of the upper clamping unit, the lower clamping unit, the upper grinding protrusion, and the lower grinding concave rod; Figure 4 This is a schematic diagram of the exploded structure of the gas collection unit; Figure 5 This is a schematic diagram of the temperature control unit. Detailed Implementation

[0018] like Figures 1-5As shown, a method for gas generation and collection through coal and rock powder grinding is implemented using a powder grinding gas collection device. The device includes a housing frame 1, within which are a lifting support unit 2, a grinding drive unit 3, an upper clamping unit 4, a lower clamping unit 5, an upper grinding protruding rod 6, a lower grinding concave rod 7, a middle clamping unit 8, a gas collection unit 9, and a temperature control unit 10. The lower end of the lifting support unit 2 is located at the bottom of the housing frame 1, and the upper end of the grinding drive unit 3 is located at the top of the housing frame 1. The lower part of the lower grinding concave rod 7 is connected to a lower clamping unit. The clamping unit 5 is fastened to the upper part of the supporting lifting unit. The upper part of the upper grinding protrusion 6 is fastened to the lower part of the grinding drive unit 3 through the upper clamping unit 4. The upper end face of the lower grinding concave rod 7 is provided with a grinding groove 11. The lower end of the upper grinding protrusion 6 is provided with a grinding head 12 that extends into the grinding groove 11. The gas collection unit 9 is sleeved and sealed on the lower outer circle of the upper grinding protrusion 6 and the upper outer circle of the lower grinding concave rod 7. The temperature control unit 10 is located outside the gas collection unit 9. The middle clamping unit 8 is located in the middle of the side wall of the box frame 1 for clamping the temperature control unit 10 and the gas collection unit 9. The method for producing and collecting gas by grinding coal and rock powder includes the following steps: S1. Secure the lower grinding concave rod 7 to the upper part of the support lifting unit through the lower clamping unit 5, and secure the upper grinding convex rod 6 to the lower part of the grinding drive unit 3 through the upper clamping unit 4. S2. Place the coal or rock to be ground into the grinding groove 11 at the upper end of the lower grinding concave rod 7; S3. Fit the lower part of the gas collection 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 collection unit 9 and the temperature control unit 10 to move upward synchronously. During the upward movement, the upper grinding rod extends into the gas collection 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 and rock to be ground. Then the lifting support unit 2 stops rising. S5. Fit the temperature control unit 10 onto the outside of the gas collection unit 9, and then activate the clamping unit 8 to clamp the temperature control unit 10 and the gas collection unit 9. S6. Start the grinding drive unit 3. The grinding drive unit 3 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 and rock in the grinding groove 11. The gas generated during the grinding process is collected by the gas collection unit 9. The temperature control unit 10 controls the temperature of the gas collection unit 9.

[0019] The lifting support unit 2 includes at least two first electric push rods 13 fixed at the bottom of the box frame 1. The first electric push rod 13 is equipped with a pressure sensor. The upper end of the first electric push rod 13 is horizontally equipped with a moving disk 14. The center of the moving disk 14 is vertically equipped with a lower positioning post 15. The lower end of the lower grinding concave rod 7 is coaxially connected with the upper end of the lower positioning post 15. The lower clamping unit 5 includes a first upper clamping ring 16, a first lower clamping ring 17, and a first double-cone sleeve 18. The first double-cone sleeve 18 is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. The first double-cone sleeve 18 has a lower expansion joint 19 along the axial direction. The first double-cone sleeve 18 is coaxially fitted onto the upper part of the lower positioning post 15 and the lower part of the lower grinding concave rod 7. The first upper clamping ring 16 is coaxially fitted onto the upper part of the first double-cone sleeve 18, and the first lower clamping ring 17 is coaxially fitted onto the lower part of the first double-cone sleeve 18. Several... A vertically positioned first locking bolt 20 is connected. 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 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 sleeve 18, and the lower expansion joint 19 of the first double-cone sleeve 18 is reduced. The upper and lower parts of the first double-cone sleeve 18 respectively clamp the outer circle of the lower grinding concave rod 7 and the outer circle of the lower positioning post 15.

[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 mounted on the top of the housing 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 lines of the upper positioning column 22 and the lower positioning column 15 coincide. The upper end of the upper grinding protrusion 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 sleeve 25. The second double-cone sleeve 25 is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. The second double-cone sleeve 25 has an upper expansion joint 26 along the axial direction. The second double-cone sleeve 25 is coaxially fitted onto the lower part of the upper positioning post 22 and the upper part of the upper grinding protrusion 6. The second upper clamping ring 23 is coaxially fitted onto the upper part of the second double-cone sleeve 25, and the second lower clamping ring 24 is coaxially fitted onto the lower part of the second double-cone sleeve 25. Several... A second locking bolt 37 is vertically positioned and connected. 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 fastening connection of the second locking bolt 37, the distance between the second upper clamping ring 23 and the second lower clamping ring 24 is shortened. The second upper clamping ring 23 and the second lower clamping ring 24 apply radial pressure to the second double cone sleeve 25, and the upper expansion joint 26 of the second double cone sleeve 25 is reduced. The upper and lower parts of the second double cone sleeve 25 respectively clamp the outer circle of the upper positioning post 22 and the outer circle of the upper grinding protrusion 6.

[0021] The gas collection unit 9 includes a sealing cylinder 27 that is open at the top and bottom. The upper part of the inner wall of the sealing cylinder 27 is provided with an upper sealing ring 38 that seals with the outer circle of the upper grinding protrusion 6. The lower part of the inner wall of the sealing cylinder 27 is provided with a lower sealing ring that seals with the outer circle of the lower grinding concave rod 7. The upper end and the lower end of the sealing cylinder 27 are respectively provided with an upper annular protective cover 28 and a lower annular protective cover 29. The middle part of the sealing cylinder 27 is connected to a gas collection pipe 30. A control valve 31 is provided on the gas collection pipe 30. The outlet end of the gas collection pipe 30 is connected to a gas collection bag 32. Temperature control unit 10 includes temperature controller 33 and temperature control strip 34. Temperature controller 33 is connected to temperature control strip 34 via wire. Temperature control strip 34 is wrapped around the outer circumference of sealing cylinder 27 and is detachably connected via Velcro 39.

[0022] The middle clamping unit 8 includes a left clamp and a right clamp that 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 pressed against the temperature control belt 34.

[0023] In step S1, the specific process of fastening the lower grinding concave rod 7 to the upper part of the support lifting unit via the lower clamping unit 5 is as follows: First, the lower end of the lower grinding concave rod 7 contacts the upper end of the lower positioning post 15. Then, the first double-cone sleeve 18, the first upper clamping ring 16, and the first lower clamping ring 17 are fitted downwards from the upper end of the lower grinding concave rod 7. When the lower half of the first double-cone sleeve 18 is fitted onto the outer circle of the lower positioning post 15, the downward movement stops. The first upper clamping ring 16 is then inserted downwards into the first locking bolt 20. The first locking bolt 20 is screwed into the interior of the first lower clamping ring 17. The first locking bolts are tightened one by one. Tighten bolt 20 to keep the first upper clamping ring 16 and the first lower clamping ring 17 horizontal. Under the fastening 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. The first upper clamping ring 16 and the first lower clamping ring 17 apply radial pressure to the first double cone sleeve 18. The lower expansion joint 19 of the first double cone sleeve 18 is reduced. The upper and lower parts of the first double cone sleeve 18 clamp the outer circle of the lower grinding concave rod 7 and the outer circle of the lower positioning post 15 respectively. In this way, the lower grinding concave rod 7 and the lower positioning post 15 are fastened together as one. In step S1, the specific process of fastening the upper grinding protrusion 6 to the lower part of the grinding drive unit 3 via the upper clamping unit 4 is as follows: First, the upper end of the upper grinding protrusion 6 contacts the lower end of the upper positioning post 22. Then, the second double-cone sleeve 25, the second upper clamping ring 23, and the second lower clamping ring 24 are fitted upward from the lower end of the upper grinding protrusion 6. When the upper half of the second double-cone sleeve 25 is fitted onto the outer circle of the upper positioning post 22, the upward movement stops. The second lower clamping ring 24 is then inserted upward through the second locking bolt 37. The second locking bolt 37 is screwed into the interior of the second upper clamping ring 23. The second upper clamping ring 23 is tightened one by one. The locking bolt 37 keeps the second upper clamping ring 23 and the second lower clamping ring 24 horizontal. Under the tightening 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. The second upper clamping ring 23 and the second lower clamping ring 24 apply radial pressure to the second double cone sleeve 25, and the upper expansion joint 26 of the second double cone sleeve 25 is reduced. The upper and lower parts of the second double cone sleeve 25 clamp the outer circle of the upper positioning post 22 and the outer circle of the upper grinding protrusion 6 respectively, thus fastening the upper grinding protrusion 6 and the upper positioning post 22 into one unit.

[0024] The specific process of step S3 is as follows: the sealing cylinder 27 is inserted into the upper part of the lower grinding concave rod 7 from top to bottom, and then the gas collecting pipe 30 and the gas collecting bag 32 are connected through a quick-connect connector; Step S5 is as follows: wrap the temperature control tape 34 around the outside of the sealing cylinder 27 and secure it with Velcro 39; then activate the second electric push rods 35 on the left and right sides, and the two clamping blocks 36 on the left and right sides move relative to each other, and the arc-shaped clamping jaws of the clamping blocks 36 clamp the temperature control tape 34 and the sealing cylinder 27.

[0025] The specific process of step S4 is as follows: the first electric push rod 13 is started, the first electric push rod 13 extends, driving the moving disk 14 to move upward. The lower clamping unit 5, the gas collecting unit 9 and the temperature control unit 10 on the moving disk 14 move upward together. During the upward movement, the upper grinding protrusion 6 extends into the sealing cylinder 27. The outer circle of the upper grinding protrusion 6 is sealed and engaged 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 and rock to be ground. Then the first electric push rod 13 stops extending.

[0026] The specific process of step S6 is as follows: 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, the grinding head 12 at the lower end of the upper grinding protrusion 6 grinds the coal and rock in the grinding groove 11, the gas generated during the grinding process is collected in the sealing cylinder 27 by the gas collecting pipe 30 into the gas collecting bag 32, and the temperature control unit 10 adjusts and controls the temperature of the internal environment of the sealing cylinder 27 during the grinding process.

[0027] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for gas generation and collection through coal and rock powder grinding, characterized in that: The powder grinding gas collection device is used for implementation. The powder grinding gas collection device includes a box frame. Inside the box frame, there are 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. The lower end of the lifting support unit is located at the bottom of the box frame, and the upper end of the grinding drive unit is located at the top of the box frame. The lower part of the lower grinding concave rod is fastened to the upper part of the lifting support unit by the lower clamping unit, and the upper part of the upper grinding convex rod is fastened to the lower part of the grinding drive unit by the upper clamping unit. The upper end face of the lower grinding concave rod is provided with a grinding groove, and the lower end of the upper grinding convex rod is provided with a grinding head that extends 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 located outside the gas collection unit, and the middle clamping unit is located 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 and collecting gas by grinding coal and rock powder includes the following steps: S1. Secure the lower grinding concave rod to the upper part of the lifting support unit through the lower clamping unit, and secure the upper grinding convex rod to the lower part of the grinding drive unit through the upper clamping unit. S2. Place the coal or rock to be ground into the grinding groove at the upper end of the lower grinding concave rod; S3. Fit the lower part of the gas collection 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 collection unit and the temperature control unit to move upward synchronously. During the upward movement, the upper grinding convex rod extends into the gas collection unit until the grinding head at the lower end of the upper grinding convex rod extends into the grinding groove and reaches the set pressure with the coal and rock to be ground. Then the lifting support unit stops rising. S5. Fit the temperature control unit onto the outside of the gas collection unit, and then start the clamping unit to clamp the temperature control unit and the gas collection unit; S6. Start the grinding drive unit. The grinding drive unit drives the upper grinding cam to rotate. The grinding head at the lower end of the upper grinding cam grinds the coal and 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. The method for gas generation and collection through coal and rock powder grinding according to claim 1, characterized in that: The lifting support unit includes at least two first electric push rods fixed at the bottom of the box frame. Each first electric push rod is equipped with a pressure sensor. The upper end of the first electric push rod is horizontally equipped with a moving disk. The center of the moving disk is vertically equipped with a lower positioning column. 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 includes a first upper clamping ring, a first lower clamping ring, and a first double-cone sleeve. The first double-cone sleeve is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. A lower expansion joint is formed along the axial direction of the first double-cone sleeve. The first double-cone sleeve is coaxially fitted onto the upper part of the lower positioning post and the lower part of the lower grinding concave rod. The first upper clamping ring is coaxially fitted onto the upper part of the first double-cone sleeve, and the first lower clamping ring is coaxially fitted onto the lower part of the first double-cone sleeve. Several... A first locking bolt is vertically positioned, with its upper part passing through the first upper clamping ring from top to bottom. The lower part of the first locking bolt is threadedly connected to the first lower clamping ring. Under the tightening 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 sleeve, reducing the lower expansion joint of the first double-cone sleeve. The upper and lower parts of the first double-cone sleeve respectively clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning post.

3. The method for gas generation and collection through coal and rock powder grinding 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 mounted on the top of the housing frame. The upper end of the upper positioning column is fixedly connected to the drive 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 protrusion 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 sleeve. The second double-cone sleeve is a sleeve structure that is thicker in the middle, thinner at both ends, and open at both ends. An upper expansion joint is formed along the axial direction of the second double-cone sleeve. The second double-cone sleeve is coaxially fitted onto the lower part of the upper positioning post and the upper part of the upper grinding protrusion. The second upper clamping ring is coaxially fitted onto the upper part of the second double-cone sleeve, and the second lower clamping ring is coaxially fitted onto the lower part of the second double-cone sleeve. Several... A second locking bolt is vertically positioned, with its lower part passing through the second lower clamping ring from bottom to top. The upper part of the second locking bolt is threaded to the second upper clamping ring. Under the tightening 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 sleeve, reducing the upper expansion joint of the second double-cone sleeve. The upper and lower parts of the second double-cone sleeve respectively clamp the outer circle of the upper positioning post and the outer circle of the upper grinding protrusion.

4. The method for gas generation and collection through coal and rock powder grinding according to claim 3, characterized in that: The gas collection unit includes a top-and-bottom permeable sealing cylinder. The upper part of the inner wall of the sealing cylinder is provided with an upper sealing ring that seals with the outer circle of the upper grinding protrusion, and the lower part of the inner wall of the sealing cylinder is provided with a lower sealing ring that seals with the outer circle of the lower grinding concave rod. The upper and lower ends of the sealing cylinder are respectively provided with an upper annular protective cover and a lower annular protective cover. A gas collection pipe is connected to the middle of the sealing cylinder. A control valve is provided on the gas collection pipe, and a gas collection bag is connected to the outlet end of the gas collection pipe.

5. The method for gas generation and collection through coal and rock powder grinding according to claim 4, characterized in that: The temperature control unit includes a temperature controller and a temperature control strip. The temperature controller is connected to the temperature control strip via a wire. The temperature control strip is wrapped around the outer circumference of the sealed cylinder and can be detachably connected via Velcro.

6. The method for gas generation and collection through coal and rock powder grinding according to claim 5, characterized in that: The clamping unit includes a left clamp and a right clamp that 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 has an arc-shaped clamping opening, which is pressed against the temperature control belt.

7. A method for gas generation and collection through coal and rock powder grinding according to claim 6, characterized in that: The specific process of fastening the lower grinding concave rod to the upper part of the lifting support unit in step S1 is as follows: First, the lower end of the lower grinding concave rod contacts the upper end of the lower positioning post. Then, the first double-cone sleeve, the first upper clamping ring, and the first lower clamping ring are fitted downward from the upper end of the lower grinding concave rod. When the lower half of the first double-cone sleeve is fitted to the outer circle of the lower positioning post, the downward movement stops. The first locking bolt is inserted downward from the first upper clamping ring. The first locking bolt is screwed into the inside of the first lower clamping ring. The first locking bolts are tightened one by one to keep the first upper clamping ring and the first lower clamping ring horizontal. Under the fastening connection 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 sleeve. The lower expansion joint of the first double-cone sleeve is reduced. The upper and lower parts of the first double-cone sleeve clamp the outer circle of the lower grinding concave rod and the outer circle of the lower positioning post, respectively. In this way, the lower grinding concave rod and the lower positioning post are fastened together as one unit. The specific process of fastening the upper grinding protrusion to the lower part of the grinding drive unit in step S1 is as follows: First, the upper end of the upper grinding protrusion contacts the lower end of the upper positioning post. Then, the second double-cone sleeve, the second upper clamping ring, and the second lower clamping ring are fitted upward from the lower end of the upper grinding protrusion. When the upper half of the second double-cone sleeve is fitted onto the outer circle of the upper positioning post, the upward movement stops. The second locking bolt is inserted upward through the second lower clamping ring. The second locking bolt is screwed into the interior of the second upper clamping ring. The second locking bolts are tightened one by one to keep the second upper clamping ring and the second lower clamping ring horizontal. Under the fastening connection 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 sleeve. The upper expansion joint of the second double-cone sleeve is reduced. The upper and lower parts of the second double-cone sleeve clamp the outer circle of the upper positioning post and the outer circle of the upper grinding protrusion, respectively. In this way, the upper grinding protrusion and the upper positioning post are fastened together as one unit.

8. A method for gas generation and collection through coal and rock powder grinding according to claim 7, characterized in that: The specific process of step S3 is as follows: insert the sealing cylinder into the upper part of the lower grinding concave rod from top to bottom, and then connect the gas collection pipe and the gas collection bag through the quick-connect coupling; Step S5 is as follows: Wrap the temperature control tape around the outside of the sealing cylinder and secure it with Velcro; then activate the second electric push rods on both sides, and the two clamping blocks on the left and right sides move relative to each other, clamping the temperature control tape and the sealing cylinder with their arc-shaped clamping jaws.

9. A method for gas generation and collection through coal and rock powder grinding according to claim 8, characterized in that: Step S4 is as follows: The first electric push rod is started and extends, driving the moving disk to move upward. The lower clamping unit, gas collection unit and temperature control unit on the moving disk move upward together. During the upward movement, the upper grinding protrusion extends into the sealing cylinder. The outer circle of the upper grinding protrusion is sealed and fitted with the upper sealing ring until the pressure sensor detects that the grinding head at the lower end of the upper grinding protrusion has extended into the grinding groove and reached the set pressure with the coal and rock to be ground. Then the first electric push rod stops extending.

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

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