Pneumatic expansion sealing type HDTE pipe connecting device

Abstract

The utility model discloses a pneumatic type expansion sealing type HDTE pipe connecting device, and relates to the technical field of pipeline connection, the pneumatic type expansion sealing type HDTE pipe connecting device comprises a first connecting pipe and a second connecting pipe, a pneumatic assembly is arranged in the first connecting pipe, and a limiting assembly is arranged in the second connecting pipe. The pneumatic assembly comprises a threaded sleeve, a connecting ring, a piston, an air bag, an air storage cavity and a limiting hole, and has the advantages that the threaded sleeve is rotated to drive the piston to compress air in the air storage cavity, so that the air bag is inflated and expanded and is tightly attached to the inner wall of the second connecting pipe, and pneumatic expansion sealing is formed; the sealing strength can be adjusted through air pressure, different pipe diameter errors or pressure environments can be adapted, the sealing effect is more reliable and even, the air bag is made of flexible materials and makes elastic contact with the inner wall of a pipeline in the expansion process, rigid abrasion is reduced, the service life of a sealing piece is prolonged, and meanwhile mechanical stress during installation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, specifically a pneumatic expansion and sealing HDTE pipe connection device. Background Technology

[0002] HDTE (high-density polyethylene) pipes are widely used in water supply and drainage projects, gas transmission, chemical pipelines and other fields due to their advantages such as corrosion resistance, good flexibility and convenient construction. However, the connection technology of HDTE pipes has always been a key issue affecting their reliability and project efficiency.

[0003] Traditional connection components (such as fixed-size sealing rings and flanges) are usually only compatible with specific pipe diameters. When the pipe specifications change, the entire set of accessories needs to be replaced, resulting in poor compatibility. To address this, we propose a pneumatic expansion and sealing type HDTE pipe connection device. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatically operated, expansion-sealing HDTE pipe connection device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic expansion and sealing HDTE pipe connection device, comprising a first connecting pipe and a second connecting pipe, wherein a pneumatic component is provided inside the first connecting pipe and a limit component is provided inside the second connecting pipe;

[0006] The pneumatic assembly includes a threaded sleeve, a connecting ring, a piston, an air bladder, an air storage chamber, and a limiting hole. The inner ring of the threaded sleeve is threadedly connected to the surface of the first connecting pipe. The side of the piston is connected to the side of the connecting ring and slidably connected to the side of the first connecting pipe. The air storage chamber is located on the side of the first connecting pipe, and the side of the piston is slidably connected to the inner wall of the air storage chamber. The limiting hole is located on the inner wall of the first connecting pipe, and the side of the air bladder is connected to the inner wall of the first connecting pipe.

[0007] The limiting component includes a limiting groove and a limiting block. The side of the limiting block is slidably connected to the inner wall of the limiting hole. The limiting groove is formed on the inner wall of the second connecting pipe. The side of the limiting block is engaged with the inner wall of the limiting groove.

[0008] As a further embodiment of this utility model: a spring is connected to the inner wall of the first connecting tube, and one end of the spring is connected to the side of the limiting block.

[0009] As a further embodiment of this utility model: the side of the airbag is slidably connected to the inner wall of the second connecting tube, and the side of the limiting block is slidably connected to the inner wall of the second connecting tube.

[0010] As a further embodiment of this utility model: the side of the threaded sleeve is rotatably connected to the side of the connecting ring, and the inner ring of the connecting ring is slidably connected to the surface of the first connecting pipe.

[0011] As a further embodiment of this utility model: the size of the first connecting tube matches the size of the inner wall of the second connecting tube, and the side of the first connecting tube is slidably connected to the inner wall of the second connecting tube.

[0012] As a further aspect of this utility model: the number of the limiting blocks matches the number of the limiting holes and the limiting grooves.

[0013] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows:

[0014] 1. This utility model uses a rotating threaded sleeve to drive a piston to compress the air in the air storage chamber, causing the airbag to inflate and tightly adhere to the inner wall of the second connecting pipe, forming a pneumatic expansion seal. Compared with traditional mechanical seals, this sealing method can adjust the sealing strength through air pressure, adapt to different pipe diameter errors or pressure environments, and the sealing effect is more reliable and uniform. The airbag is made of flexible material, and during the expansion process, it has elastic contact with the inner wall of the pipe, reducing rigid wear, extending the service life of the seal, and reducing mechanical stress during installation. It is suitable for the flexible connection requirements of plastic pipes such as HDTE pipes.

[0015] 2. This utility model uses a limiting block that is spring-loaded into the limiting groove of the second connecting pipe to form a mechanical limiting lock, preventing the first connecting pipe and the second connecting pipe from sliding or falling off relative to each other under axial force, thus improving the stability of the connection structure. The number of limiting blocks matches the limiting holes and limiting grooves, which can evenly distribute the force and avoid stress concentration at a single point, further enhancing the pull-out resistance and structural strength of the connection.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the airbag in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the connecting ring in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the gas storage chamber in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the limiting groove in an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the limiting block in an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the limiting hole in an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram of the first connecting pipe in an embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of the spring in an embodiment of this utility model.

[0026] In the figure: 1. First connecting pipe; 2. Second connecting pipe; 3. Pneumatic component; 31. Threaded sleeve; 32. Connecting ring; 33. Piston; 34. Airbag; 35. Air storage chamber; 36. Limiting hole; 4. Limiting component; 41. Limiting groove; 42. Limiting block; 43. Spring. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0028] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Please see the appendix Figure 1 - Appendix Figure 9 The present invention relates to a pneumatic expansion and sealing type HDTE pipe connection device, comprising a first connecting pipe 1 and a second connecting pipe 2, wherein a pneumatic component 3 is provided inside the first connecting pipe 1 and a limit component 4 is provided inside the second connecting pipe 2.

[0030] In embodiment 1, the pneumatic assembly 3 includes a threaded sleeve 31, a connecting ring 32, a piston 33, an air bladder 34, an air storage chamber 35, and a limiting hole 36. The inner ring of the threaded sleeve 31 is threadedly connected to the surface of the first connecting pipe 1. The side of the piston 33 is connected to the side of the connecting ring 32, and the side of the piston 33 is slidably connected to the side of the first connecting pipe 1. The air storage chamber 35 is located on the side of the first connecting pipe 1, and the side of the piston 33 is slidably connected to the inner wall of the air storage chamber 35. The limiting hole 36 is located on the inner wall of the first connecting pipe 1. The side of the air bladder 34 is connected to the surface of the first connecting pipe 1. The inner walls of the first connecting pipe 1 are connected to each other. A spring 43 is connected to the inner wall of the first connecting pipe 1. One end of the spring 43 is connected to the side of the limiting block 42. The side of the airbag 34 is slidably connected to the inner wall of the second connecting pipe 2. The side of the limiting block 42 is slidably connected to the inner wall of the second connecting pipe 2. The side of the threaded sleeve 31 is rotatably connected to the side of the connecting ring 32. The inner ring of the connecting ring 32 is slidably connected to the surface of the first connecting pipe 1. The size of the first connecting pipe 1 matches the size of the inner wall of the second connecting pipe 2. The side of the first connecting pipe 1 is slidably connected to the inner wall of the second connecting pipe 2.

[0031] Specifically, the inner ring of the threaded sleeve 31 is provided with an internal thread that matches the outer surface of the first connecting pipe 1. By rotating the threaded sleeve 31 clockwise, the axial feed characteristic of the thread is used to push the threaded sleeve 31 to move along the axis of the first connecting pipe 1 toward the air storage chamber 35. The side of the threaded sleeve 31 and the side of the connecting ring 32 are rotatably connected by a bearing, ensuring that when the threaded sleeve 31 rotates, the connecting ring 32 only slides along the axis of the first connecting pipe 1 and does not rotate with it. The rotational motion of the threaded sleeve 31 is converted into the linear motion of the connecting ring 32, which drives the piston 33 to compress the air in the air storage chamber 35 and provides power for inflating the airbag 34.

[0032] In embodiment 2, the limiting component 4 includes a limiting groove 41 and a limiting block 42. The side of the limiting block 42 is slidably connected to the inner wall of the limiting hole 36. The limiting groove 41 is opened on the inner wall of the second connecting pipe 2. The side of the limiting block 42 is engaged with the inner wall of the limiting groove 41. The number of limiting blocks 42 matches the number of limiting holes 36 and limiting grooves 41.

[0033] Specifically, spring 43 is a compression spring, with one end fixed to the inner wall of the first connecting pipe 1 and the other end connected to the side of the limiting block 42. The axis of spring 43 is aligned with the axis of the limiting hole 36. When not installed, spring 43 is in a naturally extended state, and part of the limiting block 42 is exposed in the limiting hole 36 (e.g., the exposed length is 1 / 3 of the thickness of the limiting block 42), which facilitates insertion into the limiting groove 41 of the second connecting pipe 2. When the first connecting pipe 1 is inserted into the second connecting pipe 2, the limiting block 42 is first squeezed and compressed back into the limiting hole 36 by the inner wall of the second connecting pipe 2, and spring 43 is compressed. When the limiting block 42 is aligned with the limiting groove 41, the elastic force of spring 43 pushes the limiting block 42 into the limiting groove 41, forming a mechanical lock.

[0034] Working principle:

[0035] First, the first connecting pipe 1 is inserted into the second connecting pipe 2, and the inner walls of the two are in contact. The limiting block 42 is located in the limiting hole 36, the spring 43 is in its natural state, and the airbag 34 is not inflated and is in close contact with the inner wall of the first connecting pipe 1. The threaded sleeve 31 is rotated. Because the inner ring of the threaded sleeve 31 is threadedly connected to the surface of the first connecting pipe 1, the threaded sleeve 31 moves axially along the first connecting pipe 1, which drives the connecting ring 32 and the piston 33 to slide in the air storage chamber 35. The piston 33 squeezes the air in the air storage chamber 35, and the squeezed air in the air storage chamber 35 enters the airbag 34. The airbag 34 inflates and expands, and its side is in close contact with the inner wall of the second connecting pipe 2 to achieve a seal.

[0036] During the movement of piston 33, limit block 42, under the elastic force of spring 43, pops out from limit hole 36 and gets stuck in limit groove 41 on inner wall of second connecting pipe 2, completing the limit locking of first connecting pipe 1 and second connecting pipe 2 to prevent them from sliding relative to each other. Rotate threaded sleeve 31 in the opposite direction, piston 33 retracts, volume of air storage chamber 35 increases, air in airbag 34 flows back to air storage chamber 35, airbag 34 contracts, and at the same time limit block 42 retracts into limit hole 36 under the pressure of inner wall of second connecting pipe 2, thus separating first connecting pipe 1 and second connecting pipe 2. At this point, the entire process ends.

[0037] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 limiting the scope of protection of this utility model.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0040] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A pneumatic expansion tight seal type HDTE pipe connection device comprising a first connection pipe (1) and a second connection pipe (2), characterized by: The first connecting pipe (1) is internally provided with a pneumatic assembly (3), and the second connecting pipe (2) is internally provided with a limiting assembly (4); The pneumatic assembly (3) comprises a threaded sleeve (31), a connecting ring (32), a piston (33), an air bag (34), a gas storage cavity (35) and a limiting hole (36), the inner ring of the threaded sleeve (31) is threadedly connected with the surface of the first connecting pipe (1), the side surface of the piston (33) is connected with the side surface of the connecting ring (32), the side surface of the piston (33) is slidably connected with the side surface of the first connecting pipe (1), the gas storage cavity (35) is formed in the side surface of the first connecting pipe (1), the side surface of the piston (33) is slidably connected with the inner wall of the gas storage cavity (35), the limiting hole (36) is formed in the inner wall of the first connecting pipe (1), and the side surface of the air bag (34) is connected with the inner wall of the first connecting pipe (1). The limiting assembly (4) comprises a limiting groove (41) and a limiting block (42), the side surface of the limiting block (42) is slidably connected with the inner wall of the limiting hole (36), the limiting groove (41) is formed in the inner wall of the second connecting pipe (2), and the side surface of the limiting block (42) is clamped with the inner wall of the limiting groove (41).

2. A pneumatic expansion tight seal type HDTE pipe coupling device as claimed in claim 1, wherein: The inner wall of the first connecting pipe (1) is connected with a spring (43), one end of the spring (43) is connected with the side surface of the limiting block (42).

3. A pneumatic expansion tight seal type HDTE pipe coupling device as claimed in claim 1, wherein: The side surface of the air bag (34) is slidably connected with the inner wall of the second connecting pipe (2), and the side surface of the limiting block (42) is slidably connected with the inner wall of the second connecting pipe (2).

4. A pneumatic expansion tight seal type HDTE pipe coupling device as claimed in claim 1, wherein: The side surface of the threaded sleeve (31) is rotatably connected with the side surface of the connecting ring (32), and the inner ring of the connecting ring (32) is slidably connected with the surface of the first connecting pipe (1).

5. A pneumatic expansion tight seal type HDTE pipe coupling device as claimed in claim 1, wherein: The size of the first connecting pipe (1) is matched with the size of the inner wall of the second connecting pipe (2), and the side surface of the first connecting pipe (1) is slidably connected with the inner wall of the second connecting pipe (2).

6. A pneumatic expansion tight seal type HDTE pipe coupling device as claimed in claim 1, wherein: The number of the limiting block (42) is matched with the number of the limiting hole (36) and the limiting groove (41).

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