Compression connection type connecting structure of thin-wall stainless steel fluid pipe

Abstract

The invention discloses a thin-wall stainless steel fluid pipe compression connection type connecting structure which comprises a tee joint body, three end portions of the tee joint body are connected with pipe joints, the pipe joints comprise a first pipe fitting joint and a second pipe fitting joint, one end of the first pipe fitting joint is connected with the tee joint body, the other end of the first pipe fitting joint is connected with the second pipe fitting joint, and the tee joint body is connected with the tee joint body. An annular rectangular arc groove is formed in the connecting position of the first pipe fitting connector and the second pipe fitting connector, a groove is formed in the rectangular arc groove, and an O-shaped ring is installed in the groove. The pipe fitting adopting the connecting mode is extremely low in machining cost, less in required equipment investment, simple and easy to learn, unlimited in machining production, less in machining procedures, capable of saving a large amount of cost, good in sealing performance, free of pollution, environment-friendly, low in labor intensity of production and installation, low in construction cost, long in service life of a stainless steel pipeline and suitable for large-scale popularization and application due to the fact that production is simple, low in production cost and large in price advantage. Huge benefits are brought to the society, and good economic benefits can be generated.

Description

Technical Field

[0001] The invention relates to a connection structure, in particular to a thin-wall stainless steel fluid pipe compression connection type connection structure, belonging to the technical field of pipeline connection. Background Art

[0002] At present, the thin-walled stainless steel pipe connection methods used in petrochemical ships, electric power, medicine, food, municipal, industrial and civil buildings include socket welding, clamping type, ring pressing type, lock type, rolling thread type, tapered thread type, butt welding type, etc., which are not listed one by one below.

[0003] The advantages of socket welding are: strong compressive strength, high tensile strength, and good bending deformation; its disadvantages are: high professional technology for construction, inability to carry out construction without electricity, poor self-healing ability, and severe intergranular corrosion.

[0004] The advantages of the clamping and ring-pressing connections are: they can be constructed without electricity, the installation technology content is not high, and there is no intergranular corrosion. The disadvantages are: the compression ratio of the sealing ring is inconsistent, the leakage repair is difficult, and the installation is inconvenient. The production equipment investment of the pipe fittings is relatively large.

[0005] The advantages of the lock-bracket connection are: easy installation; the disadvantages are: high cost of pipe fittings and easy damage to the seals causing leakage.

[0006] The advantages of easy-to-plug are: easy installation and no intergranular corrosion; its disadvantages are: high pipe cost, large pipe area, poor bending resistance and weak tensile strength.

[0007] The advantages of rolling thread connection are: low cost and light weight; its disadvantages are: high professional requirements for installation technology, difficult thread matching on site, poor control tooth bite, high water leakage rate and great construction difficulty.

[0008] The advantages of tapered thread connection are: good resistance to bending and deformation, good resistance to pull-out; its disadvantages are: thin-walled threads are pressed and pierced, leading to water leakage, its construction tools are mostly compressed oxygen glue, which is brittle, the installation technology is difficult, maintenance is troublesome, and the installation labor is large. Summary of the invention

[0009] The object of the present invention is to provide a compression connection structure for thin-walled stainless steel fluid pipes.

[0010] The purpose of the present invention can be achieved by the following technical solutions:

[0011] A thin-walled stainless steel fluid pipe compression connection structure comprises a tee body, the three ends of the tee body are connected to pipe joints, the pipe joints include a pipe joint 1 and a pipe joint 2, one end of the pipe joint 1 is connected to the tee body, the other end of the pipe joint 1 is connected to the pipe joint 2, an annular rectangular arc groove is provided at the connection between the pipe joint 1 and the pipe joint 2, a groove is provided inside the rectangular arc groove, an O-ring is installed in the groove, and the diameter of the groove is greater than the diameter of the pipe joint 1 and the pipe joint 2.

[0012] Optionally, the connection between the pipe joint 1 and the end of the tee body is conical, the diameter of the pipe joint 1 is larger than the end diameter of the tee body, and the small diameter end of the connection is connected to the end of the tee body.

[0013] Optionally, the cross section of the groove is rectangular, and both end corners of the cross section are arranged in arc shape.

[0014] Optionally, the end of the tee body is plugged and installed with the liner pipe to be installed through a pipe joint, and one end of the liner pipe passes through pipe joint 2 and an O-ring and extends to the connection between pipe joint 1 and the end of the tee body.

[0015] Optionally, the inner diameter and the outer diameter of the pipe joint 1 and the pipe joint 2 are the same.

[0016] Optionally, the pipe fitting joint 1 and the rectangular arc groove, as well as the rectangular arc groove and the pipe fitting joint 2 are integrally connected, and the tee body and the pipe fitting are also integrally connected.

[0017] Beneficial effects of the present invention

[0018] Compared with the existing pipe fittings, the present invention has the following advantages: the processing cost of the pipe fittings of this connection method is extremely low, the required equipment investment is small, it is simple and easy to learn, the processing and production are not restricted, the processing steps are few, a large amount of cost is saved, the sealing performance is good, there is no pollution, environmental protection, and the labor intensity of production and installation is low. Due to the simple production, low production cost and great price advantage, the project cost is reduced, the service life of the stainless steel pipe is extended, huge benefits are brought to the society, and good economic benefits can be generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 For the present invention Figure 1 sectional view of .

[0022] Figure 3 For the present invention Figure 1A is a schematic diagram of the enlarged structure of the details.

[0023] Figure 4 It is a schematic diagram of the installation structure of the liner pipe and the pipe joint of the present invention. DETAILED DESCRIPTION

[0024] like Figure 1-4 As shown, a thin-walled stainless steel fluid pipe compression connection structure includes a tee body 1, and the three ends of the tee body 1 are connected to pipe joints, and the pipe joints include a pipe joint 1 2 and a pipe joint 2 4. One end of the pipe joint 1 2 is connected to the tee body 1, and the other end of the pipe joint 1 2 is connected to the pipe joint 2 4. An annular rectangular arc groove 3 is provided at the connection between the pipe joint 1 2 and the pipe joint 2 4, and a groove is provided inside the rectangular arc groove 3. An O-ring 5 is installed in the groove, and the diameter of the groove is larger than the diameters of the pipe joint 1 2 and the pipe joint 2 4.

[0025] As a technical optimization solution of the present invention, the connection between the pipe fitting joint 2 and the end of the tee body 1 is tapered, the diameter of the pipe fitting joint 2 is larger than the end diameter of the tee body 1, and the small diameter end of the connection is connected to the end of the tee body 1. The tapered connection is simpler to connect, and the end of the liner pipe 6 can be limited when the liner pipe 6 is installed later, so that the accuracy of the liner pipe 6 can be better controlled when it is plugged in and installed.

[0026] As a technical optimization solution of the present invention, the cross section of the groove is rectangular, and the two end corners of the cross section are arc-shaped. This shape can better adapt to the O-ring 5, and the O-ring 5 is not easy to shake inside after installation. And the size of the rectangular arc groove 3 and the groove can be matched according to the O-ring 5.

[0027] As a technical optimization solution of the present invention, the end of the tee body 1 is plugged and installed with the inner liner pipe 6 to be installed through a pipe joint, and one end of the inner liner pipe 6 passes through the pipe joint 2 and the O-ring 5 and extends to the connection between the pipe joint 1 2 and the end of the tee body 1.

[0028] As a technical optimization solution of the present invention, the inner diameter and outer diameter of the pipe joint 1 2 and the pipe joint 2 4 are the same, so that the inner liner pipe 6 after installation is evenly stressed and not prone to shaking.

[0029] As a technical optimization solution of the present invention, the pipe joint 1 2 and the rectangular arc groove 3 as well as the rectangular arc groove 3 and the pipe joint 2 4 are all connected in one piece, and the tee body 1 and the pipe joint are also connected in one piece. The one-piece connection is more stable and not easy to damage, and is simpler and more efficient to manufacture.

[0030] When the present invention is used, the inner wall of the end of the pipe joint is formed into a rectangular arc groove 3 and a groove by rolling using a special mold and a powered mechanical equipment, and an O-ring 5 for sealing is placed inside the groove. Then the pipe joint and the end of the tee body 1 are welded and fixed into one.

[0031] When installing the inner liner pipe 6, insert one end of the inner liner pipe 6 into the inside of the pipe joint, pass through the pipe joint 2 4 and the O-ring 5 to the connection between the pipe joint 1 2 and the end of the tee body 1. The O-ring 5 is an elastic rubber ring that can be sleeved on the outside of the inner liner pipe 6 to seal the connection between the inner liner pipe 6 and the pipe joint. Finally, a special compression tool is used to compress the connection between the inner liner pipe 6 and the pipe joint under the action of external force, so that the connection between the inner liner pipe 6 and the pipe joint is stable. This connection structure requires the sealing member of the O-ring 5 to have a negative pressure resistance function.

[0032] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A thin-walled stainless steel fluid pipe compression connection structure, comprising a tee body (1), characterized in that: The three ends of the tee body (1) are all connected with pipe joints, and the pipe joints include a pipe joint 1 (2) and a pipe joint 2 (4). One end of the pipe joint 1 (2) is connected to the tee body (1), and the other end of the pipe joint 1 (2) is connected to the pipe joint 2 (4). An annular rectangular arc groove (3) is provided at the connection between the pipe joint 1 (2) and the pipe joint 2 (4). A groove is provided inside the rectangular arc groove (3), and an O-ring (5) is installed in the groove. The diameter of the groove is greater than the diameters of the pipe joint 1 (2) and the pipe joint 2 (4).

2. A thin-walled stainless steel fluid pipe compression connection structure according to claim 1, characterized in that: The connection between the pipe fitting joint 1 (2) and the end of the tee body (1) is arranged in a conical shape, the diameter of the pipe fitting joint 1 (2) is larger than the end diameter of the tee body (1), and the small diameter end of the connection is connected to the end of the tee body (1).

3. A thin-walled stainless steel fluid pipe compression connection structure according to claim 2, characterized in that: The cross section of the groove is rectangular, and the two end corners of the cross section are arranged in arc shape.

4. A thin-walled stainless steel fluid pipe compression connection structure according to claim 3, characterized in that: The end of the tee body (1) is plugged and installed with the inner liner pipe (6) to be installed through a pipe joint, and one end of the inner liner pipe (6) passes through the pipe joint second (4) and the O-ring (5) and extends to the connection between the pipe joint first (2) and the end of the tee body (1).

5. A thin-walled stainless steel fluid pipe compression connection structure according to claim 4, characterized in that: The inner diameter and outer diameter of the pipe joint 1 (2) and the pipe joint 2 (4) are the same.

6. A thin-walled stainless steel fluid pipe compression connection structure according to claim 4, characterized in that: The pipe joint 1 (2) and the rectangular arc groove (3) as well as the rectangular arc groove (3) and the pipe joint 2 (4) are all integrally connected, and the tee body (1) and the pipe joint are also integrally connected.

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