A slotted gas extraction screen pipe

Abstract

The application discloses a slotted gas extraction screen pipe and relates to the technical field of connecting pipes. The slotted gas extraction screen pipe comprises a pipe body and slotted units, a plurality of long-strip slotted units are arranged on the outer wall of the pipe body, the slotted units are equidistantly distributed along the circumferential direction of the pipe body, the slotted units are parallel to each other in the circumferential direction, and the slotted units are spaced apart by 30 mm in parallel. The application replaces discrete circular holes with continuous long-strip slotted units, thereby significantly increasing the effective gas inlet area of the pipe body per unit length. Meanwhile, the 3-mm narrow slotted structure can effectively prevent coal cinder with a particle size greater than 3 mm from entering the pipe, and the 30-mm axial spacing design can prevent the bridging and blocking of coal cinder between adjacent slotted units. The distribution mode of 3-4 circumferential slotted units can balance the gas inlet uniformity and the pipe body structural strength, and the slotted gas extraction screen pipe can realize efficient and stable gas extraction under the premise of ensuring the compressive rigidity.

Description

Technical Field

[0001] This invention relates to the field of connecting pipe technology, and specifically to a slotted gas extraction screen pipe. Background Technology

[0002] It is understood that most coal mines in my country use perforated screen pipes for gas drilling. The aperture of these screen pipes is mostly between 10mm and 12mm, and the hole spacing is between 150mm and 200mm. Due to the large distance between the holes, the gas extraction area is small. In addition, the 10mm to 12mm round holes can easily suck in coal slag smaller than 12mm into the extraction pipe and block the gas extraction channel. Because they are independent round holes, they can also be easily blocked by negative pressure sucking in coal slag larger than 12mm, resulting in ineffective gas extraction from the coal seam. Summary of the Invention

[0003] The purpose of this invention is to provide a slotted gas extraction screen to solve the problems of low extraction efficiency and easy clogging in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A slotted gas extraction screen pipe, characterized in that it includes a pipe body and slotted units. Several elongated slotted units are provided on the outer wall of the pipe body. The slotted units are equidistantly distributed along the circumference of the pipe body, are parallel to each other in the circumferential direction, and are spaced 30mm apart.

[0006] Furthermore, the length of the slit unit is 100mm to 200mm, and the width of the slit unit is 2 to 3mm.

[0007] Furthermore, one end of the tube is provided with an external thread connection structure, and the other end of the tube is provided with an internal thread connection structure.

[0008] Furthermore, the diameter of the tube body is 40mm to 110mm.

[0009] Furthermore, the number of the slit units distributed along the circumference of the pipe body is 3 to 4.

[0010] The beneficial effects of this invention are as follows: By replacing discrete circular holes with continuous elongated slits, this application significantly increases the effective air intake area per unit length of the pipe; at the same time, the 3mm narrow slit structure can effectively block coal slag with a particle size greater than 3mm from entering the pipe, and combined with the 30mm axial spacing design, it avoids coal slag bridging and blockage between adjacent slits; the distribution of 3 to 4 circumferential slit units takes into account both the uniformity of air intake and the structural strength of the pipe, and achieves efficient and stable gas extraction while ensuring compressive rigidity.

[0011] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached drawings: 1. Pipe body; 2. Slit unit; 3. External threaded connection structure; 4. Internal threaded connection structure. Detailed Implementation

[0014] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] Please see Figure 1A preferred embodiment of this application shows a slotted gas extraction screen pipe, characterized in that it includes a pipe body 1 and slotted units 2. Several elongated slotted units 2 are provided on the outer wall of the pipe body 1. The slotted units 2 are equidistantly distributed along the circumference of the pipe body 1. The slotted units 2 are parallel to each other in the circumferential direction and are spaced 30mm apart.

[0019] The length of the slit unit 2 is 100mm to 200mm, and the width of the slit unit 2 is 2 to 3mm.

[0020] One end of the pipe body 1 is provided with an external threaded connection structure 3, and the other end of the pipe body 1 is provided with an internal threaded connection structure 4.

[0021] The diameter of pipe body 1 is 40mm to 110mm.

[0022] The number of slit units 2 distributed along the circumference of the tube body 1 is 3 to 4.

[0023] When using,

[0024] In summary, this invention provides a slotted gas extraction screen pipe. This device significantly increases the effective air intake area per unit length of pipe by using continuous long slots instead of discrete circular holes. At the same time, the 3mm narrow slot structure can effectively block coal slag particles larger than 3mm from entering the pipe. Combined with the 30mm axial spacing design, it avoids coal slag bridging and blockage between adjacent slots. The distribution of 3 to 4 circumferential slot units takes into account both the uniformity of air intake and the structural strength of the pipe body, achieving efficient and stable gas extraction while ensuring compressive rigidity.

[0025] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0026] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A slotted gas extraction screen, characterized in that, The tube includes a tube body (1) and a slit unit (2). Several elongated slit units (2) are provided on the outer wall of the tube body (1). The slit units (2) are equidistantly distributed along the circumference of the tube body (1). The slit units (2) are parallel to each other in the circumference direction and are spaced 30 mm apart.

2. The slotted gas extraction screen pipe as described in claim 1, characterized in that, The slit unit (2) has a length of 100mm to 200mm and a width of 2 to 3mm.

3. The slotted gas extraction screen pipe as described in claim 1, characterized in that, One end of the tube (1) is provided with an external threaded connection structure (3), and the other end of the tube (1) is provided with an internal threaded connection structure (4).

4. The slotted gas extraction screen as described in claim 1, characterized in that, The diameter of the tube body (1) is 40mm to 110mm.

5. A slotted gas extraction screen as described in claim 1, characterized in that, The number of the slit units (2) distributed along the circumference of the tube body (1) is 3 to 4.

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