A plug seal threaded pin gas extraction pipe and a manufacturing method thereof

Abstract

The application discloses an inserted sealing type threaded gas drainage pipe and a manufacturing method thereof, and relates to the technical field of connecting pipes. The inserted sealing type threaded gas drainage pipe and the manufacturing method thereof are characterized in that an outer thread is arranged on the outer wall of the left end of the pipe body of the gas drainage pipe, a sleeving sealing ring groove is arranged on the outer wall of the pipe body at the right side of the outer thread, an O-shaped sealing ring is arranged in the sleeving sealing ring groove, and a flared area is arranged at the right end of the pipe body of the gas drainage pipe. An inner thread is arranged on the inner wall of the pipe body at the left end of the flared area. The application realizes fast centering and prevents wrong tooth sliding through structure optimization. The flared area and the outer thread end form double guidance of 'insertion-tightening'. The O-shaped sealing ring is extruded by the inclined surface of the flared area and the wall of the outer thread end during the process of being screwed and tightened, is deformed under pressure, fills the micro gap, and ensures the sealing purpose of the pipe thread connection.

Description

Technical Field

[0001] This invention relates to the field of connecting pipe technology, specifically to an insert-sealed threaded gas extraction pipe and its manufacturing method. Background Technology

[0002] It is understood that most coal mine borehole gas drainage pipes in my country have an internal thread on one end and an external thread on the other. However, this connection method often results in misalignment of the threads, causing misalignment and stripping. When connecting the drainage pipe, it is difficult to align the threads due to the pipe length being off-center, leading to misalignment, stripping, and inadequate tightening. Sometimes, this can even cause the threads to break, wasting pipe material. This results in low efficiency of threaded pipe connection work, leakage of grout during grouting and sealing, and blockage of the drainage pipe, causing the entire borehole grouting and sealing to fail, wasting manpower and resources. Summary of the Invention

[0003] The purpose of this invention is to provide an insert-sealed threaded gas extraction pipe and its manufacturing method. The aim is to provide an "insert-sealed threaded gas extraction pipe" that can quickly align the pipe center, prevent thread misalignment and stripping when tightening the threads, and avoid wasting the extraction pipe; and to form a connection with a fast connection and good sealing performance, in which one end is flared with a deep internal thread and the other end is threaded with an external thread.

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

[0005] An insert-sealed threaded gas extraction pipe has an external thread on the outer wall of the left end of the pipe body, and a groove for fitting a sealing ring is provided on the outer wall of the pipe body on the right side of the external thread. An O-ring is installed in the groove for fitting the sealing ring.

[0006] The gas drainage pipe has a flared section at the right end, which is funnel-shaped. The inner diameter of the left end of the flared section is 3mm smaller than the outer diameter of the left end of the gas drainage pipe, while the inner diameter of the right end of the flared section is larger than the outer diameter of the left end of the gas drainage pipe. The inner wall of the pipe body from the left end of the flared section to the right has an internal thread.

[0007] External threads are compatible with internal threads.

[0008] Furthermore, the sealing ring groove depth is 1.5mm, and the flared area depth is 40mm.

[0009] The length of the internal thread is greater than the length of the external thread to the groove of the sealing ring.

[0010] This invention also provides the following technical solutions:

[0011] A method for manufacturing an insert-sealed threaded gas extraction pipe includes the following steps: heating and flaring, machining threads, machining grooves, and fitting an O-ring seal.

[0012] S1. Heating and Flaring: The gas extraction pipe is flared on a flaring machine, and one end is heated. After heating, the flaring operation is carried out to form a flaring area with a depth of 40mm.

[0013] S2. Machining threads: Use a threading machine to tap the inner wall of the left end of the flared area to create an internal thread, and use a die to thread the other end of the gas extraction pipe to create an external thread.

[0014] S3. Machining groove: Machining a 1.5mm deep circular groove for the sealing ring on the inner outer wall of the external thread;

[0015] S4. Install O-ring seals: Install O-ring seals in the groove of the O-ring seal installation.

[0016] The beneficial effects of this invention are as follows: This application achieves rapid centering and prevents misalignment and stripping of threads through structural optimization. The flared area and the external thread end form a dual "insertion-tightening" guide. During the screwing and tightening process, the O-ring is squeezed by the inclined surface of the flared area and the pipe wall of the external thread end, and the pressure deformation fills the micro gaps, ensuring that the purpose of sealing the pipe thread connection is achieved.

[0017] 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

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the combined state shown in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached diagram: 1. External thread; 2. O-ring seal; 3. Flared area; 4. Internal thread. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Please see Figure 1 A preferred embodiment of this application shows an insert-sealing threaded gas extraction pipe. The outer wall of the left end of the pipe body is provided with an external thread 1, and the outer wall of the right side of the external thread 1 is provided with a groove for fitting a sealing ring. An O-ring 2 is provided inside the groove for fitting the sealing ring.

[0026] The gas drainage pipe has a flared section 3 at its right end, which is funnel-shaped. The inner diameter of the left end of the flared section 3 is 3mm smaller than the outer diameter of the left end of the gas drainage pipe, while the inner diameter of the right end of the flared section 3 is larger than the outer diameter of the left end of the gas drainage pipe. The inner wall of the pipe body from the left end of the flared section 3 to the right is provided with an internal thread 4.

[0027] The external thread 1 is compatible with the internal thread 4.

[0028] The sealing ring groove depth is 1.5mm, and the flared area 3 has a depth of 40mm.

[0029] The length of the internal thread 4 is greater than the length of the external thread 1 to the groove of the sealing ring.

[0030] A method for manufacturing an insert-sealed threaded gas extraction pipe includes the following steps: heating and flaring, machining threads, machining grooves, and fitting an O-ring seal.

[0031] S1. Heating and Flaring: The entire gas extraction pipe is heated on one end of the flaring machine. After the heating treatment, the flaring operation is carried out to form a flaring area 3 with a depth of 40mm.

[0032] S2. Machining threads: Use a threading machine to tap the inner wall of the left end of the flared area 3 to make an internal thread 4. Use a die to thread the other end of the gas extraction pipe to make an external thread 1.

[0033] S3. Machining groove: Machining a 1.5mm deep circular groove for the sealing ring on the inner outer wall of the external thread 1;

[0034] S4. Install O-ring 2: Install O-ring 2 in the groove of the O-ring installation.

[0035] This application can be used on gas drainage pipes of any diameter and can be made into PE, PVC and other plastic gas drainage pipes, gas drainage screen pipes, etc.

[0036] When in use, the connection method of multiple extraction tubes is to insert the external thread with a sealing ring into the flared internal thread and twist the extraction tube so that the internal and external threads can rotate and lock together, so that the sealing ring can achieve a sealing effect, thereby achieving the purpose of sealing the pipe thread connection.

[0037] In summary, this invention provides an insert-sealing threaded gas extraction pipe and its manufacturing method. The device achieves rapid centering and prevents misalignment and stripping through structural optimization. The flared area and the external thread end form a dual "insertion-tightening" guide. During the screwing and tightening process, the O-ring is squeezed by the flared area's inclined surface and the external thread end pipe wall, and the pressure deformation fills the micro gaps, ensuring the sealing purpose of the pipe thread connection.

[0038] 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.

[0039] The above embodiments merely illustrate implementation methods of the present invention, and while the descriptions are relatively 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. An insert-sealed threaded gas extraction pipe, characterized in that, The outer wall of the left end of the gas extraction pipe is provided with an external thread (1), and the outer wall of the pipe body on the right side of the external thread (1) is provided with a groove for fitting a sealing ring, and an O-ring (2) is provided in the groove for fitting a sealing ring. The right end of the gas extraction pipe is provided with a flared area (3), which is trumpet-shaped. The inner diameter of the left end of the flared area (3) is 3mm smaller than the outer diameter of the left end of the gas extraction pipe. The inner diameter of the right end of the flared area (3) is larger than the outer diameter of the left end of the gas extraction pipe. The inner wall of the pipe from the left end of the flared area (3) to the right is provided with an internal thread (4). The external thread (1) is compatible with the internal thread (4).

2. The insertion-sealed threaded gas extraction pipe as described in claim 1, characterized in that, The groove depth of the sealing ring is 1.5mm, and the depth of the flared area (3) is 40mm. The length of the internal thread (4) is greater than the length of the external thread (1) to the groove of the sealing ring.

3. A method for manufacturing an insert-sealed threaded gas extraction pipe, characterized in that, The steps include: heating and flaring, machining threads, machining grooves, and installing O-ring seals (2). S1. Heating and flaring: The entire gas extraction pipe is flared on a flaring machine, and one end is heated. After the heating treatment, the flaring operation is carried out to form a flaring area with a depth of 40mm (3). S2. Machining threads: Use a threading machine to tap the inner wall of the left end of the flared area (3) to make an internal thread (4), and use a die to thread the other end of the gas extraction pipe to make an external thread (1). S3. Machining groove: Machining a 1.5mm deep circular groove for the sealing ring on the inner outer wall of the external thread (1); S4, Install O-ring (2): Install O-ring (2) in the groove of the O-ring installation.

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