Corrosion-resistant stainless-steel-lined double-seal connecting piece

Abstract

The invention provides a corrosion-resistant lining stainless steel double-seal connecting piece, and belongs to the technical field of stainless steel composite pipes. Comprising an adjusting main pipe, two connecting auxiliary pipes connected with the left end and the right end of the adjusting main pipe, a stainless steel composite pipe connected with the connecting auxiliary pipes and a double-sealing blocking mechanism. Sealing connecting structures are arranged between the adjusting main pipe and the connecting auxiliary pipe and between the connecting auxiliary pipe and the stainless steel composite pipe respectively, sealing connection is guaranteed in a double-sealing mode, meanwhile, the stainless steel composite pipe and the abutting pipe are sealed through the sealing gasket, and the sealing effect is good. The stainless steel composite pipe and the auxiliary sub-pipe are sealed through the second sealing strip, so that the overall sealing performance is greatly improved, the possibility of leakage is reduced, and the continuity and safety of fluid transmission are ensured; when the connecting auxiliary pipe is connected with the adjusting main pipe, double limiting and fixing effects are adopted, displacement between the connecting auxiliary pipe and the adjusting main pipe is avoided, and firmness and stability of connection are greatly enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel composite pipes, in particular to a corrosion-resistant stainless steel lined double sealing connector. Background Art

[0002] Pipeline refers to a device connected by pipes, pipe connectors and valves for conveying gas, liquid or fluid with solid particles. Usually, the fluid flows from the high pressure part of the pipeline to the low pressure part after being pressurized by blowers, compressors, pumps and boilers. It can also be conveyed by the pressure of the fluid itself or gravity. Pipeline is widely used, mainly in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Lined stainless steel composite steel pipe is a composite thin-walled stainless steel pipe on the inner wall of the steel pipe. This bimetallic composite steel pipe greatly improves the corrosion resistance of the steel pipe in the process of water, hot water, gas, natural gas and oil transportation. It has a smooth surface and low fluid resistance, and retains the high mechanical strength of the steel pipe. It can be welded, grooved, threaded and has good sealing.

[0003] When the connectors between existing stainless steel composite pipes are in use, the traditional single sealing structure may not provide sufficient sealing performance under high pressure, high temperature or corrosive environment, which may easily lead to leakage and affect the safety and reliability of the system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention provides a corrosion-resistant stainless steel lined double sealing connector.

[0005] The technical solution of the present invention is: a corrosion-resistant stainless steel lined double-sealed connector, comprising an adjusting main pipe, two connecting auxiliary pipes connected to the left and right ends of the adjusting main pipe, a stainless steel composite pipe connected to the connecting auxiliary pipes, and a double-sealed barrier mechanism;

[0006] The inner wall of the regulating main pipe is provided with a plurality of horizontal sliding grooves arranged along the circumferential direction and a plurality of inner annular grooves distributed in a grid shape with the horizontal sliding grooves, the outer wall of the connecting auxiliary pipe is provided with a plurality of sliding clamping blocks corresponding to the horizontal sliding grooves one by one, an abutting pipe is provided inside the connecting auxiliary pipe and near the opening of the regulating main pipe, and the outer wall of the stainless steel composite pipe is threadedly connected with the inner wall of the corresponding connecting auxiliary pipe;

[0007] The double sealing barrier mechanism comprises a first sealing member provided at the connection between the auxiliary pipe and the regulating main pipe, and a second sealing member provided at the opening of the abutting pipe and arranged opposite to the stainless steel composite pipe;

[0008] The first sealing member comprises horizontal plug-in grooves at the upper and lower ends of the openings on both sides of the adjusting main pipe, a plug-in rod with one end inserted into the plug-in hole, an annular mounting ring provided at the lower end of the plug-in rod, an elastic sealing ring provided at the side wall of the annular mounting ring and close to the bottom end of one side of the plug-in hole, and a horizontal lifting plate connected to the outer wall of the adjusting main pipe and corresponding to each of the horizontal plug-in grooves through an elastic connecting rod, a vertical plug-in rod penetrating into the interior of the horizontal plug-in groove is provided at the bottom end of the horizontal lifting plate, and a fixed plug-in hole is provided at the upper end of the plug-in rod;

[0009] The second sealing member comprises an annular mounting seat which is arranged at the opening of the abutting tube and has an annular clamping recess on its side wall, and a sealing gasket which is arranged in the annular clamping recess.

[0010] Furthermore, an outer annular groove is provided on the outer wall of the adjusting main pipe corresponding to each of the inner annular grooves, an inner rotating ring is provided in the inner annular groove, and a first tooth is provided on the side wall of the inner rotating ring, an outer rotating ring is provided in the outer annular groove, the outer rotating ring and the inner rotating ring are connected through an auxiliary connecting ring, a fixing hole is provided on the outer wall of each outer annular groove, a limiting plug-in column is provided on the outer wall of the adjusting main pipe corresponding to each of the fixing holes, and a second tooth meshing with the first tooth is provided on the outer wall of the sliding clamping block.

[0011] Description: When the auxiliary pipe is connected to the adjusting main pipe, each sliding clamping block is inserted into the corresponding horizontal sliding groove, and the sliding clamping block is moved to the inner annular groove between two adjacent horizontal sliding grooves by rotation to complete the connection between the auxiliary pipe and the adjusting main pipe. In order to improve the connection reliability between the two, an inner rotating ring is arranged in the inner annular groove, and the first teeth on the outer wall of the inner rotating ring are engaged with the second teeth on the outer wall of the sliding clamping block to complete the first fixed connection. At the same time, an outer rotating ring is arranged in the outer annular groove, and the limiting plug-in column is inserted into the fixing hole on the outer rotating ring to complete the second fixed connection. Through the two limiting and fixing effects, displacement between the auxiliary pipe and the adjusting main pipe is avoided, which greatly enhances the reliability and stability of the connection.

[0012] Furthermore, the outer wall of the regulating main pipe is provided with an inverted U-shaped linkage frame vertically distributed with each of the outer annular grooves, the bottom end of the inverted U-shaped linkage frame is connected to a horizontal lifting rod through a spring rod, and each of the limiting plug-in columns is arranged at the lower end of the horizontal lifting rod.

[0013] Description: When the spring rod is at a free length, each limit plug-in column is inserted into the corresponding fixing hole. When the limit plug-in column needs to be moved out, pull the horizontal lifting rod upward to compress the spring rod. The structure is simple and easy to disassemble and operate, which greatly shortens the installation time of the stainless steel composite pipe and improves work efficiency.

[0014] Furthermore, first sealing strips are provided on left and right sides of the outer rotating ring and the inner rotating ring.

[0015] Description: The purpose is to increase the sealing between the outer rotating ring and the outer annular groove and between the inner rotating ring and the inner annular groove to avoid leakage of gas or liquid in the connecting auxiliary pipe.

[0016] Furthermore, the connecting auxiliary pipe is composed of a plurality of sub-auxiliary pipes with successively increasing inner diameters, and two adjacent sub-auxiliary pipes are connected by threads, and a screwing handle is provided on the side wall of each sub-auxiliary pipe opposite to the regulating main pipe.

[0017] Description: Several sub-auxiliary tubes with successively increasing inner diameters are provided in order to provide the use of stainless steel composite tubes of various diameters. According to the diameter of the stainless steel composite tube, a corresponding number of sub-auxiliary tubes are selected so that the outer wall of the stainless steel composite tube is connected to the inner wall of the innermost sub-auxiliary tube. At the same time, the disassembly and installation of each sub-auxiliary tube are facilitated by twisting the handle, thereby increasing the compatibility and application scope of the double sealing barrier mechanism.

[0018] Furthermore, the outer wall of the stainless steel composite pipe can be threadedly connected to the inner wall of the sub-auxiliary pipe, and a limiting sealing ring is rotatably connected to one side of the outer wall of the stainless steel composite pipe, and the limiting sealing ring is threadedly connected to the outer wall of the sub-auxiliary pipe.

[0019] Description: The outer wall of the stainless steel composite pipe is connected to the inner wall of the innermost sub-auxiliary pipe through threads, which makes full use of the thread structure of the sub-auxiliary pipe, reduces additional connecting parts, simplifies the structure, and improves the connection sealing through a limiting sealing ring between the stainless steel composite pipe and the sub-auxiliary pipe.

[0020] Furthermore, a second sealing strip is provided in the limiting sealing ring and abuts against the connection gap between the stainless steel composite pipe and the sub-auxiliary pipe.

[0021] Note: The second sealing strip improves the sealing performance of the connection between the stainless steel composite pipe and the auxiliary sub-pipe.

[0022] Furthermore, an annular mounting sleeve is provided on the outer sleeve of the abutting tube, and the annular mounting sleeve is slidably connected to the inner wall of the connecting auxiliary tube.

[0023] Description: Providing support between the outer wall of the abutment tube and the inner wall of the connecting auxiliary tube to avoid displacement between the connecting abutment tube and the connecting auxiliary tube, indirectly enhancing the connection reliability and stability of the stainless steel composite pipe.

[0024] Furthermore, the size of the vertical plug rod matches the size of the fixed plug hole, and a tip portion is provided at the bottom end of the vertical plug rod.

[0025] Description: The size of the vertical plug-in rod is limited to match the size of the fixed socket, in order to ensure that the vertical plug-in rod can be reliably inserted into the fixed socket. At the same time, the tip portion facilitates the accurate insertion of the bottom end of the vertical plug-in rod into the fixed socket, thereby reducing the difficulty of alignment during installation.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] (1) When the corrosion-resistant lined stainless steel double-sealed connector of the present invention is used, a sealing connection structure is respectively provided between the regulating main pipe and the connecting auxiliary pipe and between the connecting auxiliary pipe and the stainless steel composite pipe, and a sealed connection is ensured by double sealing. At the same time, the stainless steel composite pipe and the abutting pipe are sealed by a sealing gasket, and the stainless steel composite pipe and the sub-auxiliary pipe are sealed by a second sealing strip, which greatly improves the overall sealing performance, reduces the possibility of leakage, and ensures the continuity and safety of fluid transmission;

[0028] (2) The connecting auxiliary tube of the present invention is inserted into the corresponding horizontal sliding groove through each sliding clamping block, and the sliding clamping block is moved to the inner annular groove between two adjacent horizontal sliding grooves by rotation, so as to realize flexible adjustment of the position of the connecting auxiliary tube, so that the adjusting main tube and the connecting auxiliary tube are reliably connected. On this basis, the first teeth on the outer wall of the inner rotating ring are meshed with the second teeth on the outer wall of the sliding clamping block to complete the first fixed connection. At the same time, an outer rotating ring is arranged in the outer annular groove, and the limiting plug-in column is inserted into the fixing hole on the outer rotating ring to complete the second fixed connection. Through the two limiting fixing effects, displacement between the connecting auxiliary tube and the adjusting main tube is avoided, which greatly enhances the reliability and stability of the connection.

[0029] (3) The connecting auxiliary tube of the present invention is composed of several sub-auxiliary tubes with successively increasing inner diameters, with the purpose of providing the use of stainless steel composite tubes of various diameters. According to the diameter of the stainless steel composite tube, a corresponding number of sub-auxiliary tubes are selected so that the outer wall of the stainless steel composite tube is connected to the inner wall of the sub-auxiliary tube located on the innermost side. At the same time, the disassembly and installation of each sub-auxiliary tube is facilitated by twisting the handle, thereby increasing the compatibility and application scope of the double sealing barrier mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the stainless steel composite pipe of the present invention when it is installed;

[0031] Figure 2 is a schematic structural diagram of the annular mounting seat of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the inner annular groove of the present invention;

[0033] Figure 4is a cross-sectional view of the regulating main pipe of the present invention;

[0034] Figure 5 is a schematic structural diagram of a connecting auxiliary pipe of the present invention;

[0035] Figure 6 It is a schematic diagram of the connection structure of the stainless steel composite pipe and the connecting auxiliary pipe of the present invention;

[0036] Among them, 1-adjusting main pipe, 10-horizontal sliding groove, 11-inner annular groove, 110-inner rotating ring, 111-first tooth, 12-outer annular groove, 120-outer rotating ring, 121-fixing hole, 13-auxiliary connecting ring, 130-first sealing strip, 14-limiting plug-in column, 15-inverted U-shaped linkage frame, 150-spring rod, 151-horizontal lifting rod, 2-connecting auxiliary pipe, 20-sliding card block, 200-second tooth, 21-butting pipe, 210-annular mounting sleeve, 22-sub-auxiliary Tube, 220-screw handle, 3-stainless steel composite tube, 30-limit sealing ring, 31-second sealing strip, 4-double sealing barrier mechanism, 40-first sealing member, 400-horizontal plug-in groove, 401-plug-in rod, 4010-fixed plug hole, 402-annular mounting ring, 403-elastic sealing ring, 404-elastic connecting rod, 405-horizontal lifting plate, 406-vertical plug-in rod, 41-second sealing member, 410-annular clamping recess, 411-annular mounting seat, 412-sealing gasket. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail below through examples.

[0038] Example 1

[0039] like Figure 1 As shown, a corrosion-resistant lined stainless steel double-sealed connector includes an adjusting main pipe 1, two connecting auxiliary pipes 2 connected to the left and right ends of the adjusting main pipe 1, a stainless steel composite pipe 3 connected to the connecting auxiliary pipes 2, and a double-sealed barrier mechanism 4;

[0040] like Figure 3 As shown, the inner wall of the regulating main pipe 1 is provided with 4 horizontal sliding grooves 10 along the circumferential direction and 4 inner annular grooves 11 distributed in a grid shape with the horizontal sliding grooves 10, the outer wall of the connecting auxiliary pipe 2 is provided with 4 sliding clamping blocks 20 corresponding to the horizontal sliding grooves 10 one by one, the inside of the connecting auxiliary pipe 2 and the opening close to the regulating main pipe 1 is provided with an abutting pipe 21, and the outer wall of the stainless steel composite pipe 3 is threadedly connected with the corresponding inner wall of the connecting auxiliary pipe 2;

[0041] The double sealing barrier mechanism 4 includes a first sealing member 40 provided at the connection between the auxiliary pipe 2 and the regulating main pipe 1, and a second sealing member 41 provided at the opening of the abutting pipe 21 and opposite to the stainless steel composite pipe 3;

[0042] The first sealing member 40 comprises horizontal plug-in grooves 400 provided at the upper and lower ends of the openings on both sides of the regulating main pipe 1, a plug-in rod 401 with one end inserted into the plug-in hole 400, an annular mounting ring 402 provided at the lower end of the plug-in rod 401, an elastic sealing ring 403 provided at the side wall of the annular mounting ring 402 and close to the bottom end of one side of the plug-in hole 400, and a horizontal lifting plate 405 connected to the outer wall of the regulating main pipe 1 and corresponding to each horizontal plug-in groove 400 through an elastic connecting rod 404, a vertical plug-in rod 406 penetrating into the interior of the horizontal plug-in groove 400 is provided at the bottom end of the horizontal lifting plate 405, and a fixed plug-in hole 4010 is provided at the upper end of the plug-in rod 401;

[0043] like Figure 2 As shown, the second sealing member 41 includes an annular mounting seat 411 disposed at the opening of the abutting tube 21 and having an annular clamping recess 410 on its side wall, and a sealing gasket 412 disposed in the annular clamping recess 410;

[0044] An annular mounting sleeve 210 is provided on the outer sleeve of the abutting tube 21, and the annular mounting sleeve 210 is slidably connected to the inner wall of the connecting auxiliary tube 2, providing a supporting effect between the outer wall of the abutting tube 21 and the inner wall of the connecting auxiliary tube 2, avoiding displacement between the connecting abutting tube 21 and the connecting auxiliary tube 2, and indirectly enhancing the connection reliability and stability of the stainless steel composite tube 3;

[0045] The size of the vertical plug-in rod 406 matches the size of the fixed socket 4010, and a pointed end is provided at the bottom end of the vertical plug-in rod 406, which limits the size of the vertical plug-in rod 406 to match the size of the fixed socket 4010, in order to ensure that the vertical plug-in rod 406 can be reliably inserted into the fixed socket 4010. At the same time, the pointed end facilitates the accurate insertion of the bottom end of the vertical plug-in rod 406 into the fixed socket 4010, thereby reducing the difficulty of alignment during installation.

[0046] Example 2

[0047] This embodiment records a connection method of a corrosion-resistant lined stainless steel double-sealed connector of embodiment 1, comprising the following steps:

[0048] S1. Installation of connecting auxiliary pipe 2

[0049] Insert each sliding card block 20 on the outer wall of the adjusting main pipe 1 into the corresponding horizontal sliding groove 10 at one end of the adjusting main pipe 1, and move the sliding card block 20 to the inner annular groove 11 between two adjacent horizontal sliding grooves 10 by rotating. Then, take another adjusting main pipe 1 and insert each sliding card block 20 on its outer wall into the corresponding horizontal sliding groove 10 at the other end of the adjusting main pipe 1. Repeat the above steps to complete the connection between the connecting auxiliary pipe 2 and the adjusting main pipe 1.

[0050] S2. Installation of the first sealing member 40

[0051] The vertical plug rod 406 is pulled upward to compress the elastic connecting rod 404, and the bottom end of the vertical plug rod 406 is lifted and separated from the surface of the plug rod 401. At this time, the plug rod 401 is pushed into the horizontal plug slot 400, so that the fixed plug hole 4010 is directly opposite to the bottom end of the vertical plug rod 406, and the elastic sealing ring 403 is filled in the joint between the regulating main pipe 1 and the connecting auxiliary pipe 2. At this time, the vertical plug rod 406 is loosened, and under the elastic force of the elastic connecting rod 404, the tip of the bottom end of the vertical plug rod 406 is inserted into the fixed plug hole 4010;

[0052] S3, Installation of stainless steel composite pipe 3

[0053] Take a stainless steel composite tube 3 and thread it into one of the connecting auxiliary tubes 2. When the stainless steel composite tube 3 abuts against the front end of the abutting tube 21, it is sealed by the sealing gasket 412 in the annular clamping recess 410. Repeat the above steps and install the stainless steel composite tube 3 in the other connecting auxiliary tube 2.

[0054] Example 3

[0055] The difference between this embodiment and embodiment 1 is that:

[0056] like Figure 4 As shown, an outer annular groove 12 is provided on the outer wall of the adjusting main pipe 1 and corresponds to each inner annular groove 11, an inner rotating ring 110 is provided in the inner annular groove 11, and a first tooth 111 is provided on the side wall of the inner rotating ring 110, an outer rotating ring 120 is provided in the outer annular groove 12, and the outer rotating ring 120 is connected with the inner rotating ring 110 through an auxiliary connecting ring 13, and a fixing hole 121 is provided on the outer wall of each outer annular groove 12, and a limiting plug-in column 14 is provided on the outer wall of the adjusting main pipe 1 and corresponds to each fixing hole 121, and a second tooth 200 meshing with the first tooth 111 is provided on the outer wall of the sliding clamping block 20, and displacement between the connecting auxiliary pipe 2 and the adjusting main pipe 1 is avoided through the two limiting fixing effects, which greatly enhances the reliability and stability of the connection;

[0057] An inverted U-shaped linkage frame 15 is arranged on the outer wall of the regulating main pipe 1 and is vertically distributed with each outer annular groove 12. The bottom end of the inverted U-shaped linkage frame 15 is connected to a horizontal lifting rod 151 through a spring rod 150. Each limiting plug-in column 14 is arranged at the lower end of the horizontal lifting rod 151. When the spring rod 150 is at a free length, each limiting plug-in column 14 is inserted into the corresponding fixing hole 121. When the limiting plug-in column 14 needs to be moved out, the horizontal lifting rod 151 is pulled upward to compress the spring rod 150. The structure is simple, and the disassembly and operation are convenient, which greatly shortens the installation time of the stainless steel composite pipe 3 and improves the work efficiency.

[0058] First sealing strips 130 are provided on both sides of the outer rotating ring 120 and the inner rotating ring 110 to increase the sealing between the outer rotating ring 120 and the outer annular groove 12 and between the inner rotating ring 110 and the inner annular groove 11 to prevent leakage of gas or liquid in the connecting auxiliary pipe 2.

[0059] Example 4

[0060] The difference between this embodiment and embodiment 2 is that:

[0061] In step S1, an inner rotating ring 110 is arranged in the inner annular groove 11, and the first teeth 111 on the outer wall of the inner rotating ring 110 are meshed with the second teeth 200 on the outer wall of the sliding clamping block 20 to complete the first fixed connection. At the same time, an outer rotating ring 120 is arranged in the outer annular groove 12, and the limiting plug-in column 14 is inserted into the fixing hole 121 on the outer rotating ring 120 to complete the second fixed connection. When it is necessary to move the limiting plug-in column 14 out, the horizontal lifting rod 151 is pulled upward to compress the spring rod 150, and the outer rotating ring 120 and the outer annular groove 12 are sealed by the first sealing strip 130.

[0062] Example 5

[0063] The difference between this embodiment and embodiment 3 is that:

[0064] like Figure 5 As shown, the connecting auxiliary pipe 2 is composed of three sub-auxiliary pipes 22 with successively increasing inner diameters, and two adjacent sub-auxiliary pipes 22 are connected by threads, and a screwing handle 220 is provided on the side wall of each sub-auxiliary pipe 22 opposite to the regulating main pipe 1. A plurality of sub-auxiliary pipes with successively increasing inner diameters are provided to provide the use of stainless steel composite pipes of various diameters. According to the diameter of the stainless steel composite pipe, a corresponding number of sub-auxiliary pipes are selected so that the outer wall of the stainless steel composite pipe is connected to the inner wall of the sub-auxiliary pipe located at the innermost side. At the same time, the screwing handle facilitates the disassembly and installation of each sub-auxiliary pipe, thereby increasing the compatibility and application scope of the double sealing barrier mechanism;

[0065] like Figure 6As shown, the outer wall of the stainless steel composite pipe 3 can be threadedly connected to the inner wall of the sub-auxiliary pipe 22, and a limiting sealing ring 30 is rotatably connected to one side of the outer wall of the stainless steel composite pipe 3, and the limiting sealing ring 30 is threadedly connected to the outer wall of the sub-auxiliary pipe 22. The outer wall of the stainless steel composite pipe 3 is threadedly connected to the inner wall of the sub-auxiliary pipe 22 located at the innermost side, which fully utilizes the thread structure of the sub-auxiliary pipe 22, can reduce additional connection components, simplify the structure, and improve the connection sealing performance between the stainless steel composite pipe 3 and the sub-auxiliary pipe 22 through the limiting sealing ring 30;

[0066] A second sealing strip 31 is provided in the limiting sealing ring 30 and abuts against the connection gap between the stainless steel composite pipe 3 and the auxiliary sub-pipe 21 . The second sealing strip 31 improves the connection sealing between the stainless steel composite pipe 3 and the auxiliary sub-pipe 21 .

[0067] Example 6

[0068] The difference between this embodiment and embodiment 4 is that:

[0069] In step S1, according to the diameter of the stainless steel composite tube 3, a corresponding number of sub-auxiliary tubes 22 are selected to connect the outer wall of the stainless steel composite tube 3 with the inner wall of the innermost sub-auxiliary tube 22. At the same time, the handle 220 is screwed to facilitate the disassembly and installation of each sub-auxiliary tube 22, and the stainless steel composite tube 3 and the sub-auxiliary tube 22 are sealed by the second sealing strip 31.

Claims

1. A corrosion-resistant stainless steel lined double seal connector, characterized in that: It comprises an adjusting main pipe (1), two connecting auxiliary pipes (2) connected to the left and right ends of the adjusting main pipe (1), a stainless steel composite pipe (3) connected to the connecting auxiliary pipes (2), and a double sealing barrier mechanism (4); The inner wall of the regulating main pipe (1) is provided with a plurality of horizontal sliding grooves (10) arranged along the circumferential direction and a plurality of inner annular grooves (11) distributed in a grid pattern with the horizontal sliding grooves (10); the outer wall of the connecting auxiliary pipe (2) is provided with a plurality of sliding clamping blocks (20) corresponding one-to-one to the horizontal sliding grooves (10); an abutting pipe (21) is provided inside the connecting auxiliary pipe (2) and near the opening of the regulating main pipe (1); the outer wall of the stainless steel composite pipe (3) is threadedly connected to the inner wall of the corresponding connecting auxiliary pipe (2); The double sealing barrier mechanism (4) comprises a first sealing member (40) provided at the connection between the auxiliary pipe (2) and the regulating main pipe (1), and a second sealing member (41) provided at the opening of the abutting pipe (21) and arranged opposite to the stainless steel composite pipe (3); The first sealing member (40) comprises horizontal plug-in grooves (400) provided at the upper and lower ends of the openings on both sides of the regulating main pipe (1), a plug-in rod (401) with one end inserted into the plug-in hole (400), an annular mounting ring (402) provided at the lower end of the plug-in rod (401), an elastic sealing ring (403) provided on the side wall of the annular mounting ring (402) and close to the bottom end of one side of the plug-in hole (400), and a horizontal lifting plate (405) connected to the outer wall of the regulating main pipe (1) and corresponding to each of the horizontal plug-in grooves (400) through an elastic connecting rod (404), the bottom end of the horizontal lifting plate (405) is provided with a vertical plug-in rod (406) penetrating into the interior of the horizontal plug-in groove (400), and the upper end of the plug-in rod (401) is provided with a fixed plug-in hole (4010); The second sealing member (41) comprises an annular mounting seat (411) disposed at the opening of the abutting tube (21) and having an annular clamping recess (410) on its side wall, and a sealing gasket (412) disposed in the annular clamping recess (410).

2. A corrosion-resistant stainless steel lined double sealing connector according to claim 1, characterized in that: An outer annular groove (12) is provided on the outer wall of the adjusting main pipe (1) and corresponds to each inner annular groove (11); an inner rotating ring (110) is provided in the inner annular groove (11), and a first tooth (111) is provided on the side wall of the inner rotating ring (110); an outer rotating ring (120) is provided in the outer annular groove (12); the outer rotating ring (120) and the inner rotating ring (110) are connected through an auxiliary connecting ring (13); a fixing hole (121) is provided on the outer wall of each outer annular groove (12); a limiting plug-in column (14) is provided on the outer wall of the adjusting main pipe (1) and corresponds to each fixing hole (121); and a second tooth (200) meshing with the first tooth (111) is provided on the outer wall of the sliding clamping block (20).

3. A corrosion-resistant stainless steel lined double sealing connector according to claim 2, characterized in that: The outer wall of the regulating main pipe (1) is provided with an inverted U-shaped linkage frame (15) vertically distributed with each of the outer annular grooves (12); the bottom end of the inverted U-shaped linkage frame (15) is connected to a horizontal lifting rod (151) via a spring rod (150); and each of the limit plug-in columns (14) is arranged at the lower end of the horizontal lifting rod (151).

4. A corrosion-resistant stainless steel lined double sealing connector according to claim 2, characterized in that: First sealing strips (130) are provided on both left and right sides of the outer rotating ring (120) and the inner rotating ring (110).

5. The corrosion-resistant stainless steel lined double sealing connector according to claim 1, characterized in that: The connecting auxiliary pipe (2) is composed of a plurality of sub-auxiliary pipes (22) with successively increasing inner diameters, and two adjacent sub-auxiliary pipes (22) are connected by threads, and a screwing handle (220) is provided on the side wall of each sub-auxiliary pipe (22) on the side opposite to the regulating main pipe (1).

6. A corrosion-resistant stainless steel lined double sealing connector according to claim 5, characterized in that: The outer wall of the stainless steel composite pipe (3) can be threadedly connected to the inner wall of the auxiliary sub-pipe (22), and a limit sealing ring (30) is rotatably connected to one side of the outer wall of the stainless steel composite pipe (3), and the limit sealing ring (30) is threadedly connected to the outer wall of the auxiliary sub-pipe (22).

7. A corrosion-resistant stainless steel lined double sealing connector according to claim 6, characterized in that: A second sealing strip (31) is provided in the limiting sealing ring (30) and is in contact with the connection gap between the stainless steel composite pipe (3) and the auxiliary sub-pipe (21).

8. The corrosion-resistant stainless steel lined double sealing connector according to claim 1, characterized in that: An annular mounting sleeve (210) is sleeved on the outside of the abutting tube (21), and the annular mounting sleeve (210) is slidably connected to the inner wall of the connecting auxiliary tube (2).

9. The corrosion-resistant stainless steel lined double sealing connector according to claim 1, characterized in that: The size of the vertical plug-in rod (406) matches the size of the fixed plug hole (4010), and a tip portion is provided at the bottom end of the vertical plug-in rod (406).

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