A mine air supply pipeline butt joint structure

Abstract

The utility model discloses a kind of mine air supply pipeline butt joint structure, it relates to air supply pipeline technical field, including the first pipeline and the second pipeline of same specification, sealing steel ring and a pair of elastic sealing ring, the sealing steel ring is composed of tubular steel ring and sheet steel ring, the inner ring of sheet steel ring is fixedly connected with the center position of tubular steel ring, the sealing ring is composed of tubular ring and sheet ring, the inner ring of sheet ring is fixedly connected with one end of tubular ring, the butt joint end of the first pipeline and the second pipeline is provided with flange, the sealing steel ring is arranged between a pair of flanges;The utility model increases sealing steel ring between the flange of first pipeline and second pipeline, sealing ring is arranged between sealing steel ring and flange and pipeline, not only form radial seal between sealing steel ring and flange, and form axial seal between sealing steel ring and pipeline inner side wall, greatly improve the tightness.

Description

Technical Field

[0001] This utility model relates to the field of air supply pipeline technology, specifically a docking structure for a mine air supply pipeline. Background Technology

[0002] Mine ventilation pipelines are a core component of mine ventilation systems, and the reliability of their sealing connections directly affects the safety of underground workers and the normal operation of production activities. Currently, the connection of mine ventilation pipelines generally adopts the flange connection method, that is, flanges are welded to the ends of the two pipelines, the two flanges are fastened together with bolts, and a sheet gasket is sandwiched between the mating surfaces of the two flanges to achieve a seal.

[0003] This traditional flange-plate gasket sealing structure relies primarily on the preload provided by the bolts to compress the gasket, causing it to deform on the radial contact surface of the flange to fill the microscopic unevenness on the flange sealing surface, thus forming a single radial seal. Although this structure is simple and low-cost, in practical applications, especially in complex and demanding underground mines, when the preload of the bolts decreases due to vibration, temperature changes, or stress relaxation, the gasket's rebound compensation capability is limited, making leakage highly likely. Relying solely on the clamping force between the flange end faces to achieve radial sealing has poor compensation capability, a single effect, and insufficient reliability. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a docking structure for mine ventilation pipelines. A sealing steel ring is added between the flanges of the first and second pipelines. A sealing ring is set between the sealing steel ring, the flange, and the pipeline, forming not only a radial seal with the flange but also an axial seal with the inner wall of the pipeline, greatly improving the sealing performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mine ventilation pipeline connection structure, comprising a first and second pipeline of identical specifications, a sealing steel ring, and a pair of elastic sealing rings. The sealing steel ring is composed of a tubular steel ring and a sheet steel ring, with the inner ring of the sheet steel ring fixedly connected to the center of the tubular steel ring. The sealing ring is composed of a tubular ring and a sheet ring, with the inner ring of the sheet ring fixedly connected to one end of the tubular ring. Flanges are welded to the connection ends of the first and second pipelines, and the sealing steel ring is positioned between the pair of flanges. A pair of sealing rings are respectively disposed between a flange and a sealing steel ring. The outer diameter of the tubular ring is equal to the inner diameter of the first pipe, and the outer diameter of the tubular steel ring is greater than the inner diameter of the tubular ring but smaller than the outer diameter of the tubular ring. One side of the tubular ring is inserted into the inner side of the first pipe and the second pipe, and the tubular steel ring is inserted into the inner side of the tubular ring. The flange is provided with multiple first through holes, the plate ring is provided with a second through hole corresponding to the position of the first through hole, and the plate steel ring is provided with a third through hole corresponding to the position of the second through hole. The plate steel ring, the pair of plate rings, and the pair of flanges are fixed by multiple bolts.

[0006] Preferably, chamfers are provided at both ends of the side surface of the tubular steel ring.

[0007] Preferably, the tubular steel ring and the plate steel ring are integrally formed.

[0008] Preferably, the tubular ring and the sheet ring are integrally molded.

[0009] Preferably, the sealing steel ring is made of 304 stainless steel.

[0010] Preferably, the sealing ring is made of EPDM rubber.

[0011] This utility model provides a docking structure for mine ventilation pipelines, which has the following beneficial effects: 1. This utility model adds a sealing steel ring between the flanges of the first pipe and the second pipe. The sealing steel ring is set between the flange and the pipe, which not only forms a radial seal with the flange, but also forms an axial seal with the inner wall of the pipe, greatly improving the sealing performance. 2. The tubular steel ring of the sealing steel ring of this utility model is chamfered, which makes it easy to squeeze into the inner wall of the tubular ring of the sealing ring during installation, thereby squeezing it tightly against the inner wall of the first pipe and the second pipe, thus achieving circumferential and axial sealing. It is easy to install and has a reasonable design. Attached Figure Description

[0012] Figure 1 This is a front sectional view of the installation of a docking structure for a mine ventilation pipeline according to this utility model. Figure 2This is a front sectional view of the docking structure for a mine ventilation pipeline before installation, according to this utility model. Figure 3 This is a schematic diagram of a sealing ring for a mine ventilation pipeline connection structure according to the present invention; Figure 4 This is a schematic diagram of existing technology.

[0013] In the diagram: 1. First pipe; 2. Second pipe; 3. Flange; 4. Chamfer; 5. Bolt; 6. Sealing steel ring; 7. Sealing ring; 8. Second through hole; 9. First through hole; 10. Third through hole; 61. Tubular steel ring; 62. Plate steel ring; 71. Tubular ring; 72. Plate ring. Detailed Implementation

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

[0015] like Figure 1-4 As shown, a mine ventilation pipeline connection structure includes a first pipeline 1 and a second pipeline 2 of the same specifications, a sealing steel ring 6, and a pair of elastic sealing rings 7. The sealing steel ring 6 is composed of a tubular steel ring 61 and a plate-shaped steel ring 62. The inner ring of the plate-shaped steel ring 62 is fixedly connected to the center of the tubular steel ring 61. The sealing ring 7 is composed of a tubular ring 71 and a plate-shaped ring 72. The inner ring of the plate-shaped ring 72 is fixedly connected to one end of the tubular ring 71. A flange 3 is welded to the connection end of the first pipeline 1 and the second pipeline 2. The sealing steel ring 6 is disposed between the pair of flanges 3, and the pair of sealing rings 7 are respectively disposed between the flanges 3 and the sealing steel ring 6. The outer diameter of the tubular ring 71 is equal to the inner diameter of the first pipeline 1, and the outer diameter of the tubular steel ring 61 is larger than the inner diameter of the tubular ring 71 but smaller. The tubular ring 71 is inserted into the inner side of the first pipe 1 and the second pipe 2 on one side, and the tubular steel ring 61 is inserted into the inner side of the tubular ring 71. The flange 3 is provided with a plurality of first through holes 9. The plate ring 72 is provided with a second through hole 8 corresponding to the position of the first through hole 9. The plate steel ring 62 is provided with a third through hole 10 corresponding to the position of the second through hole 8. The plate steel ring 62, a pair of plate rings 72 and a pair of flanges 3 are fixed by a plurality of bolts 5. The two ends of the side surface of the tubular steel ring 61 are provided with chamfers 4. The tubular steel ring 61 and the plate steel ring 62 are integrally molded. The tubular ring 71 and the plate ring 72 are integrally molded. The sealing steel ring 6 is made of 304 stainless steel. The sealing ring 7 is made of EPDM rubber.

[0016] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows: According to the instruction manual Figure 1-4 As can be seen, when using this utility model, since the outer diameter of the tubular ring 71 is equal to the inner diameter of the first pipe 1, it can be inserted into the inner wall of the first pipe 1 and the second pipe 2. Simultaneously, ensure the first through hole 9 and the second through hole 8 are aligned. Then, bring the first pipe 1 and the second pipe 2 close together and place the sealing steel ring 6 between a pair of sealing rings 7. Because the outer diameter of the tubular steel ring 61 is larger than the inner diameter of the tubular ring 71 but smaller than the outer diameter of the tubular ring 71, the tubular steel ring 61 can compress the tubular ring 71 and tightly fit it against the inner wall of the first pipe 1 and the second pipe 2, achieving an axial sealing effect. During installation, ensure the third through hole 10 is aligned with the second through hole 8. Then, use bolts 5 to pass through all the first through holes 9, second through holes 8, and third through holes 10 for fixing. During fixing, ensure that the plate ring 72 is deformed by the compression of the first pipe 1 and the plate steel ring 62, as well as the second pipe 2 and the plate steel ring 62, so that there are no gaps after installation, ensuring radial sealing. This invention forms an axial seal by the compression of the tubular steel ring 61 and the inner wall of the pipe against the tubular ring 71, and forms a radial seal by the compression of the sheet steel ring 62 and the end face of the flange 3 against the sheet ring 72. The double sealing effect greatly improves the sealing performance of the mine air supply pipeline.

[0017] The tubular steel ring 61 has chamfers 4 at both ends of its side surface. During installation, it is easy to squeeze the inner wall of the tubular ring 71 of the sealing ring 7, thereby squeezing it tightly against the inner wall of the first pipe 1 and the second pipe 2, thus achieving circumferential and axial sealing. This design is convenient for installation and reasonable.

[0018] Among them, the tubular steel ring 61 and the plate steel ring 62 are integrally molded to increase the overall sealing performance and stability. The sealing steel ring 6 is made of 304 stainless steel, which has excellent corrosion resistance, certain strength and hardness, and good stability.

[0019] Among them, the tubular ring 71 and the sheet ring 72 are integrally molded to increase the overall sealing performance and stability. The sealing ring 7 is made of EPDM rubber, which has the advantages of excellent aging resistance, long service life, and is very suitable for outdoor or harsh environmental conditions.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connection structure for a mine ventilation pipeline, characterized in that, The system includes a first pipe (1) and a second pipe (2) of the same specifications, a sealing steel ring (6), and a pair of elastic sealing rings (7). The sealing steel ring (6) is composed of a tubular steel ring (61) and a plate-shaped steel ring (62). The inner ring of the plate-shaped steel ring (62) is fixedly connected to the center of the tubular steel ring (61). The sealing ring (7) is composed of a tubular ring (71) and a plate-shaped ring (72). The inner ring of the plate-shaped ring (72) is fixedly connected to one end of the tubular ring (71). Flanges (3) are welded to the mating ends of the first pipe (1) and the second pipe (2). The sealing steel ring (6) is positioned between the pair of flanges (3), and the pair of sealing rings (7) are respectively positioned between the flanges (3) and the sealing steel ring (6). The outer diameter of the tubular ring (71) is equal to the inner diameter of the first pipe (1). The outer diameter of the tubular steel ring (61) is greater than the inner diameter of the tubular ring (71) and less than the outer diameter of the tubular ring (71). One side of the tubular ring (71) is inserted into the inner side of the first pipe (1) and the second pipe (2). The tubular steel ring (61) is inserted into the inner side of the tubular ring (71). The flange (3) is provided with a plurality of first through holes (9). The plate ring (72) is provided with a second through hole (8) corresponding to the position of the first through hole (9). The plate steel ring (62) is provided with a third through hole (10) corresponding to the position of the second through hole (8). The plate steel ring (62), a pair of plate rings (72) and a pair of flanges (3) are fixed by a plurality of bolts (5).

2. The connection structure for a mine ventilation pipeline according to claim 1, characterized in that, The tubular steel ring (61) has chamfers (4) at both ends of its side surface.

3. The connection structure for a mine ventilation pipeline according to claim 1, characterized in that, The tubular steel ring (61) and the sheet steel ring (62) are integrally molded.

4. The connection structure for a mine ventilation pipeline according to claim 1, characterized in that, The tubular ring (71) and the sheet ring (72) are integrally molded.

5. The connection structure for a mine ventilation pipeline according to claim 1, characterized in that, The sealing steel ring (6) is made of 304 stainless steel.

6. The connection structure for a mine ventilation pipeline according to claim 1, characterized in that, The sealing ring (7) is made of EPDM rubber.

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