Pneumatic crushing tank

Abstract

The utility model provides a pneumatic crushing tank which comprises a tank body (3), and the tank body (3) can rotate by taking the axis of the tank body as a rotating shaft; the interior of the tank body (3) is a cylindrical cavity and is internally provided with a plurality of solid cylinders (4); the tank body (3) is of an integrally-formed structure, and a plurality of turning protrusions (7) are arranged on the inner wall of the tank body (3). The device further comprises a hollow rotary joint (1), an upper cover (2), a coupler (5), a pneumatic rotary motor (6) and an outer protective cover (9). According to the utility model, the tank body rotates at a high speed, so that a coal sample is collided and rolled at a high speed between the solid cylinder (4) and the turning bulge (7), and the efficient and uniform crushing effect of the coal sample is realized.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine tunnel engineering equipment, specifically relating to a pneumatic pulverizer. Background Technology

[0002] Coal seam gas content is a fundamental parameter for engineering projects such as coal and gas outburst prevention, gas drainage design, and gas emission prediction. It restricts the reliability of mine gas hazard prediction and affects the effectiveness and economy of gas drainage measures formulated based on gas content. Currently, numerous studies on coal seam gas content determination have been conducted both domestically and internationally. The measurement process requires the use of a pneumatic pulverizer to pulverize the mined coal sample to detect the amount of gas extracted. For example, the Chinese utility model patent CN221039030U, "A Coal Seam Gas Content Determination Device," uses a pneumatic pulverizer that uses rotating metal blades to cut the coal sample into powder. However, the metal blades of the aforementioned pneumatic pulverizer may leave uncuttable chunks of coal sample below the pulverizer; due to the varying shapes and sizes of the coal samples, the powder produced is uneven, leading to prolonged cutting time. More importantly, prolonged blade rotation heats the coal sample, increasing the sample temperature and accelerating gas extraction, resulting in inaccurate final gas content measurements. Utility Model Content

[0003] The technical problem to be solved by this invention is how to improve the efficiency of coal sample crushing and the uniformity of powder.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution:

[0005] This utility model provides a pneumatic pulverizing tank, including a tank body that can rotate around its axis; the interior of the tank body is a cylindrical cavity containing several solid cylinders; the tank body is a one-piece molded structure with several directional protrusions on its inner wall.

[0006] Preferably, the tank body is made of stainless steel.

[0007] Preferably, the length of the solid cylinder along the axial direction is greater than the diameter of the tank and less than the vertical height of the tank.

[0008] Preferably, the solid cylinder is made of copper alloy or aluminum-magnesium alloy.

[0009] Preferably, the length of the directional protrusion along the axial direction is consistent with the height of the inner cavity of the tank.

[0010] Preferably, the directional protrusion is located at the intersection of two diameters that intersect perpendicularly with the cross-section of the tank and the inner wall of the tank.

[0011] Preferably, the cross-section of the convex shape is a minor arc fan shape.

[0012] Furthermore, the pneumatic pulverizer also includes a hollow rotary joint, a top cover, a coupling, and a pneumatic rotary motor.

[0013] Furthermore, the hollow rotary joint is a bearing structure in which the outer ring rotates and the inner ring is fixed.

[0014] Furthermore, the pneumatic pulverizer also includes an outer protective cover, which encloses the hollow rotary joint, top cover, tank body, coupling, and pneumatic rotary motor inside.

[0015] The advantages of this utility model are:

[0016] The pneumatic pulverizer provided by this invention uses high-speed rotation of the canister to cause the coal sample inside to be rapidly crushed by collision between the solid cylinder and the convex inner wall of the canister. The crushing area covers the entire canister, thus achieving a more efficient and uniform pulverization effect compared to existing technologies that use metal blades for cutting at a very small level. Simultaneously, due to the efficient collision and crushing of this invention, the coal sample is quickly pulverized with less heat generated, reducing the amount of gas desorption accelerated by heating. As an important part of gas content measurement, this invention reduces the error in measuring the gas content of coal samples compared to existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pneumatic pulverizing tank according to the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-section of the tank body of this utility model;

[0019] Reference numerals: 1. Hollow rotary joint; 2. Top cover; 3. Tank body; 4. Solid cylinder; 5. Coupling; 6. Pneumatic rotary motor; 7. Reversing protrusion; 8. Ventilation hose; 9. Outer protective cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] Example 1

[0023] This embodiment provides a pneumatic pulverizing tank, including a tank body 3, with the structure as follows: Figure 1 and Figure 2 As shown, the tank 3 can rotate around its axis; the interior of the tank 3 is a cylindrical cavity with three solid cylinders 4 inside; there is no connection between the solid cylinders 4 and the tank 3; the tank 3 is a one-piece molded structure with four directional protrusions 7 on its inner wall.

[0024] As the core structure for coal sample impact crushing, the tank body 3 needs to be made of stainless steel, taking into account its service life and the underground environment. Therefore, it needs to have sufficient hardness and corrosion resistance.

[0025] The solid cylinder 4 has a length along its axis that is greater than the diameter of the tank 3 and less than the vertical height of the tank 3. The solid cylinder 4 needs to move at high speed in a vertical posture as the tank rotates in order to form an irregular collision motion with the coal sample inside the tank. Therefore, the length of the solid cylinder 4 along its axis needs to be greater than the inner diameter of the tank 3 to prevent it from lying horizontally at the bottom of the tank 3.

[0026] Solid cylinder 4 is a replaceable consumable, and the requirement for low heat generation is greater than the requirement for high hardness. Therefore, aluminum-magnesium alloy is used to further reduce the heat generated during the crushing and grinding of coal samples.

[0027] The deflecting protrusion 7 is integrally formed with the tank body 3 and is located on the inner wall of the cavity of the tank body 3. Its length along the axial direction is consistent with the height of the inner cavity of the tank body 3, which can ensure that the coal sample distributed throughout the tank body 3 is uniformly crushed by impact. The deflecting protrusion 7 is set at the intersection of the two diameters that intersect perpendicularly with the cross-section of the tank body 3 and the inner wall of the tank body 3, and is evenly distributed at 90 degrees relative to the center of the cross-section. The number of deflecting protrusions 7 can also be increased or decreased according to the actual crushing effect. Figure 2 As shown, the cross-section of the convex 7 is a minor arc fan shape. The convex part of its central angle can be adjusted in terms of angle or the top of the central angle can be adjusted to be arc-shaped, depending on the comprehensive consideration of service life and crushing efficiency.

[0028] The pneumatic pulverizer also includes a hollow rotary joint 1, a top cover 2, a coupling 5, and a pneumatic rotary motor 6. The hollow rotary joint 1 is a bearing structure with a rotating outer ring and a fixed inner ring. A vent hose 8 is connected to the upper end of the hollow rotary joint 1 for connecting to other external equipment to exhaust gas from inside the tank 3. The pneumatic pulverizer also includes an outer protective cover 9, which encloses the hollow rotary joint 1, top cover 2, tank 3, coupling 5, and pneumatic rotary motor 6 internally.

[0029] In this embodiment, the operation mode of the provided pneumatic pulverizer is as follows:

[0030] Open the top cover 2, add an appropriate amount of lumpy coal sample to the tank 3, close the top cover 2 using a quick-locking method, and start the pneumatic rotary motor 6. The pneumatic rotary motor 6 is a commonly used motor device in coal mines that is prohibited from being electrified. It is driven by high-pressure gas and is existing technology, so it will not be described in detail in this embodiment. The pneumatic rotary motor 6 drives the tank 3 to rotate at high speed, causing the coal sample in the tank 3 and the freely placed solid cylinder 4 to rotate at high speed in the cavity of the tank 3. When the coal block or the solid cylinder 4 comes into contact with the deflecting protrusion 7 on the inner wall of the tank 3, it will change its direction of movement, causing the coal block to form irregular high-speed collision and crushing between the deflecting protrusion 7 and the solid cylinder 4, and finally be efficiently crushed into uniform coal sample powder.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pneumatic pulverizing tank, comprising a tank body (3), characterized in that, The tank (3) can rotate around its axis; the inside of the tank (3) is a cylindrical cavity with several solid cylinders (4) inside; the tank (3) is a one-piece molded structure with several directional protrusions (7) on its inner wall.

2. The pneumatic pulverizer according to claim 1, characterized in that, The tank (3) is made of stainless steel.

3. The pneumatic pulverizer according to claim 1, characterized in that, The length of the solid cylinder (4) along the axial direction is greater than the diameter of the inner cavity of the tank (3) and less than the vertical height of the inner cavity of the tank (3).

4. The pneumatic pulverizer according to claim 1, characterized in that, The solid cylinder (4) is made of aluminum-magnesium alloy.

5. The pneumatic pulverizer according to claim 1, characterized in that, The length of the directional protrusion (7) along the axial direction is consistent with the height of the inner cavity of the tank (3).

6. The pneumatic pulverizer according to claim 1, characterized in that, The deflecting protrusion (7) is located at the intersection of two diameters that intersect perpendicularly with the cross-section of the tank body (3) and the inner wall of the tank body (3).

7. The pneumatic pulverizer according to claim 1, characterized in that, The cross-section of the directional protrusion (7) is a minor arc fan shape.

8. The pneumatic pulverizer according to claim 1, characterized in that, It also includes a hollow rotary joint (1), a top cover (2), a coupling (5), and a pneumatic rotary motor (6).

9. The pneumatic pulverizer according to claim 8, characterized in that, The hollow rotary joint (1) is a bearing structure in which the outer ring rotates and the inner ring is fixed.

10. The pneumatic pulverizer according to claim 8, characterized in that, It also includes an outer protective cover (9) that encloses the hollow rotary joint (1), the top cover (2), the tank body (3), the coupling (5), and the pneumatic rotary motor (6) inside.

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