Anti-corrosion heat-preservation stainless steel clamping and pressing type pipe fitting

Abstract

The utility model discloses an anti-corrosion heat preservation stainless steel clamping and pressing type pipe fitting which comprises a pipeline connecting mechanism, a clamping and pressing mechanism and a clamping and pressing auxiliary mechanism, the pipeline connecting mechanism comprises a connecting inner pipe, a connecting outer pipe, a mounting slope and a sealing ring, and the clamping and pressing mechanism comprises a rotating shaft, a clamping and pressing plate, a clamping and pressing groove, a mounting groove, a moving sleeve, a moving groove and a jacking shaft. Through the nested design of the connecting inner pipe and the connecting outer pipe, the sealing ring and the mounting slope are matched, the tightness during pipeline connection is ensured, the leakage risk is reduced, the jacking shaft is driven by the movable sleeve to press downwards, the clamping and pressing plate is pried into the clamping and pressing groove, one-key clamping is achieved, operation is easy and convenient, and firm connection is ensured through cooperation of the clamping and pressing plate and the clamping and pressing groove; the pipeline is prevented from loosening due to vibration or pressure change, the limiting sleeve and the rotating block can stably rotate through step-by-step matching of the spring rod and the matching hole, and it is guaranteed that the clamping pressure degree is controllable.

Description

Technical Field

[0001] This utility model relates to the field of press-fit pipe fittings, and more specifically, it relates to a corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting. Background Technology

[0002] While corrosion-resistant and heat-insulating stainless steel press-fit pipe fittings offer relatively ideal corrosion resistance and heat insulation in some applications, they still suffer from poor sealing between pipes and inconvenient pipe connection and disassembly in actual use.

[0003] Press-fit pipe fittings rely on press-fit tools to connect pipes and fittings, while the sealing performance mainly depends on the quality of the sealing ring and the tightness of the press. However, during long-term use, due to temperature changes, pressure fluctuations, or mechanical vibration of the pipe, the sealing ring may age or deform, resulting in a decrease in sealing performance. This can lead to leakage or air leakage between pipes, affecting the safety and reliability of the pipeline system.

[0004] Compression fittings typically require specialized compression tools for connection. These tools are relatively complex to operate, demanding certain skills and experience. Improper use or incorrect operation during connection can lead to unstable connections, further affecting the sealing effect. Disassembly is also cumbersome and time-consuming, as compression connections are tightened mechanically. This inconvenience is particularly pronounced in situations requiring frequent disassembly, maintenance, or adjustments. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting to solve the technical problems mentioned in the background art, such as poor sealing effect between connected pipes and inconvenience in connecting or disassembling pipes.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting, comprising a pipe connection mechanism, a press-fit mechanism, and a press-fit auxiliary mechanism. The pipe connection mechanism includes a connecting inner pipe, a connecting outer pipe, an installation slope, and a sealing ring. The connecting inner pipe can extend into the interior of the connecting outer pipe. The installation slope is set on the inner wall of the connecting outer pipe. The sealing ring is installed on the installation slope, and one end of the connecting inner pipe is press-fitted against the sealing ring for sealing. The press-fit mechanism includes a rotating shaft, a press-fit plate, a press-fit groove, an installation groove, a movable sleeve, a moving groove, and a top-pressing shaft. The installation groove is set on the side wall of the press-fit pipe. The rotating shaft is installed in the installation groove. The press-fit plate is rotatably installed on the rotating shaft. The press-fit groove is set on the outer wall of the connecting inner pipe. The movable sleeve is directionally movable and installed on the outer wall of the connecting outer pipe. The moving groove is set on the side wall of the movable sleeve. The top-pressing shaft is installed at the top end of the moving groove. The movable sleeve moves downward, and the top-pressing shaft presses against the press-fit plate, causing the press-fit plate to pry into the press-fit groove.

[0009] The present invention is further configured such that the clamping auxiliary mechanism includes a limiting sleeve, a pressure slope plate, a push slope plate, a rotating block, a spring rod, and a fixing ring. The limiting sleeve is rotatably mounted on the outer wall of the connecting outer tube. The push slope plate is mounted on the top end of the movable sleeve, and the pressure slope plate is mounted on the bottom end of the limiting sleeve. The rotating pressure slope plate presses against the push slope plate, causing the movable sleeve to move longitudinally. The rotating block is mounted on the top end of the limiting sleeve, and the fixing ring is fixedly mounted on the outer wall of the connecting outer tube. The spring rod is mounted on the rotating block, and the spring rod can extend into the mating hole step by step, so that the rotating block and the limiting sleeve can rotate stably.

[0010] The present invention is further configured such that a first connecting plate is installed at one end of the connecting inner tube, the first connecting plate is connected to the external pipe, the first connecting plate facilitates the connection between the inner tube and the external pipe, and increases the connection flexibility.

[0011] The present invention is further configured such that a second connecting plate is installed at one end of the connecting outer pipe, and the second connecting plate is connected to the external pipe. The second connecting plate facilitates the connection between the connecting outer pipe and the external pipe, thereby expanding the application range.

[0012] The present invention is further configured such that a support plate is installed at one end of the connecting outer tube, and a return spring is installed at the top end of the support plate.

[0013] The present invention is further configured such that a spring groove is provided at the bottom end of the movable sleeve, and one end of the reset spring is connected to the top wall of the spring groove. The spring groove provides a fixed space for the reset spring to ensure reliable reset action.

[0014] The present invention is further configured such that the fixing ring is provided with mating holes, and multiple sets of mating holes are provided, and the spring rod can be mated with the holes in stages, so that the mating holes and the spring rod can cooperate to form multi-level positioning.

[0015] The present invention is further configured such that a bottom pressure shaft is installed at the bottom end of the motion groove, and a reset spring pushes the moving sleeve and the bottom pressure shaft against the clamping plate, so that the clamping plate is away from the clamping groove. During the disassembly process, the bottom pressure shaft lifts the clamping plate, which facilitates the separation of the pipe.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting, which has the following beneficial effects:

[0018] This utility model features a pipe connection mechanism. Through the nested design of the inner and outer pipes, combined with a sealing ring and installation slope, it ensures the tightness of the pipe connection and reduces the risk of leakage. The first and second connecting plates facilitate quick docking with external pipes, improving connection flexibility and adapting to different application scenarios. The stainless steel material combined with the sealing structure effectively prevents the intrusion of corrosive media while maintaining the thermal insulation performance of the pipeline system.

[0019] This utility model is equipped with a clamping mechanism. The moving sleeve drives the top pressure shaft to press down, so that the clamping plate is pried into the clamping groove, realizing one-click clamping. The operation is simple. The cooperation between the clamping plate and the clamping groove ensures a firm connection and prevents the pipeline from loosening due to vibration or pressure changes. The return spring and the bottom pressure shaft automatically lift the clamping plate during disassembly, making the pipe fitting easy to separate and improving maintenance efficiency.

[0020] This utility model is equipped with a clamping auxiliary mechanism. The step-by-step cooperation between the spring rod and the mating hole enables the limiting sleeve and the rotating block to rotate stably, ensuring that the clamping pressure is controllable. The reset spring pushes the moving sleeve to reset, so that the clamping plate is disengaged from the clamping groove, which is convenient for repeated disassembly and assembly. The inclined surface cooperation between the pressure plate and the push plate makes the longitudinal movement of the moving sleeve more effortless and improves the installation efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2 This is a schematic diagram of the partial clamping mechanism in this utility model;

[0023] Figure 3 This is a schematic diagram of the pipe connection mechanism in this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the clamping mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the clamping auxiliary mechanism in this utility model.

[0026] In the diagram: 1. Connecting inner tube; 2. Connecting outer tube; 3. Mounting slope; 4. Sealing ring; 5. Rotating shaft; 6. Clamping plate; 7. Clamping groove; 8. Mounting groove; 9. Moving sleeve; 10. Moving groove; 11. Top pressure shaft; 12. Limiting sleeve; 13. Pressure slope plate; 14. Pushing slope plate; 15. Rotating block; 16. Spring rod; 17. Fixing ring; 18. First connecting plate; 19. Second connecting plate; 20. Support plate; 21. Return spring; 22. Spring groove; 23. Mating hole; 24. Bottom pressure shaft. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5 A corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting includes a pipe connection mechanism, a press-fit mechanism, and a press-fit auxiliary mechanism. The pipe connection mechanism includes an inner connecting pipe 1, an outer connecting pipe 2, an mounting slope 3, and a sealing ring 4. The inner connecting pipe 1 can extend into the interior of the outer connecting pipe 2. The mounting slope 3 is set on the inner wall of the outer connecting pipe 2. The sealing ring 4 is installed on the mounting slope 3, and one end of the inner connecting pipe 1 is press-fitted against the sealing ring 4 for sealing. The press-fit mechanism includes a rotating shaft 5, a press-fit plate 6, a press-fit groove 7, an installation groove 8, and a movable... The sleeve 9, the moving groove 10, and the top pressing shaft 11 are arranged in a mounting groove 8 on the side wall of the clamping pipe. The rotating shaft 5 is installed in the mounting groove 8. The clamping plate 6 is rotatably installed on the rotating shaft 5. The clamping groove 7 is arranged on the outer wall of the connecting inner pipe 1. The moving sleeve 9 is directionally moved and installed on the outer wall of the connecting outer pipe 2. The moving groove 10 is arranged on the side wall of the moving sleeve 9. The top pressing shaft 11 is installed at the top end of the moving groove 10. The moving sleeve 9 moves downward and the top pressing shaft 11 presses against the clamping plate 6, so that the clamping plate 6 is pried into the clamping groove 7.

[0031] In this embodiment, the pipe connection mechanism realizes the connection and sealing functions between pipes. When the inner pipe 1 is inserted into the outer pipe 2, the end of the inner pipe contacts the sealing ring 4 installed on the mounting slope 3 on the inner wall of the outer pipe. When the clamping pressure is applied, the end of the inner pipe 1 is pressed against the sealing ring 4, causing the sealing ring 4 to deform and fit tightly against the contact surface of the two pipes, forming a reliable sealing structure. The inclined surface design of the mounting slope 3 allows the sealing ring 4 to deform evenly under pressure, improving the sealing effect. In addition, the first connecting plate 18 and the second connecting plate 19 are respectively installed at the ends of the inner pipe 1 and the outer pipe 2, which facilitates connection with external pipes and expands the application range of the pipe fittings. The clamping mechanism is responsible for firmly locking the inner pipe 1 and the outer pipe 2. In the initial state, the clamping plate 6 is installed in the mounting groove 8 on the side wall of the outer pipe 2 through the rotating shaft 5 and is in an unengaged state. When the moving sleeve 9 moves downward along the outer wall of the outer pipe 2, the top pressure shaft 11 installed in the moving groove 10 on the side wall of the moving sleeve 9 contacts the clamping plate 6 and applies inward pressure to the clamping plate 6. Under this force, the clamping plate 6 rotates around the rotating shaft 5, and the tip part pries into the clamping groove 7 on the outer wall of the inner tube 1. This mechanical engagement structure forms a firm lock to prevent the inner tube 1 from being pulled out of the outer tube 2. When the moving sleeve 9 moves upward under the action of the return spring 21, the bottom pressure shaft 24 will push against the clamping plate 6, causing the clamping plate 6 to disengage from the clamping groove 7, which facilitates the disassembly of the fitting.

[0032] The clamping auxiliary mechanism includes a limiting sleeve 12, a pressure slope plate 13, a push slope plate 14, a rotating block 15, a spring rod 16, and a fixing ring 17. The limiting sleeve 12 is rotatably mounted on the outer wall of the connecting outer tube 2. The push slope plate 14 is mounted on the top end of the movable sleeve 9. The pressure slope plate 13 is mounted on the bottom end of the limiting sleeve 12. The rotating pressure slope plate 13 presses against the push slope plate 14, causing the movable sleeve 9 to move longitudinally. The rotating block 15 is mounted on the top end of the limiting sleeve 12. The fixing ring 17 is fixedly mounted on the outer wall of the connecting outer tube 2. The spring rod 16 is mounted on the rotating block 15. The spring rod 16 can extend into the mating hole 23 step by step, so that the rotating block 15 and the limiting sleeve 12 can rotate stably.

[0033] In this embodiment, the limiting sleeve 12 can be rotated to a limit on the outer wall of the connecting outer tube 2. The pressure plate 13 at its bottom contacts the push-receiving slope plate 14 at the top of the moving sleeve 9 during rotation. When the limiting sleeve 12 rotates, the inclined surface of the pressure plate 13 slides along the push-receiving slope plate 14, converting the rotational motion into the longitudinal movement of the moving sleeve 9. The rotating block 15 is installed on the top of the limiting sleeve 12 and engages with multiple sets of mating holes 23 on the fixing ring 17 through the spring rod 16 to achieve step-by-step positioning, so that the limiting sleeve 12 can be stably maintained in different rotational positions. The simple rotational operation is converted into precise clamping force, allowing the operator to achieve effective clamping with less force. At the same time, the step-by-step clamping design avoids insufficient or excessive clamping.

[0034] Please see Figures 1-5 As a supplementary embodiment of a corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting for pipe connection mechanism, press-fit mechanism and press-fit auxiliary mechanism: A first connecting plate 18 is installed at one end of the inner pipe 1, and the first connecting plate 18 is connected to the external pipe. A second connecting plate 19 is installed at one end of the outer pipe 2, and the second connecting plate 19 is connected to the external pipe. A support plate 20 is installed at one end of the outer pipe 2, and a return spring 21 is installed at the top end of the support plate 20. A spring groove 22 is opened at the bottom end of the moving sleeve 9, and one end of the return spring 21 is connected to the top wall of the spring groove 22. A mating hole 23 is opened on the fixed ring 17, and multiple sets of mating holes 23 are provided. The spring rod 16 can mat with the holes 23 step by step. A bottom pressure shaft 24 is installed at the bottom end of the moving groove 10, and the return spring 21 pushes the moving sleeve 9 and the bottom pressure shaft 24 against the press-fit plate 6, so that the press-fit plate 6 is away from the press-fit groove 7.

[0035] More specifically, the inner connecting tube 1 is inserted into the outer connecting tube 2, so that the end of the inner connecting tube 1 contacts the sealing ring 4 installed on the mounting slope 3. At this time, the clamping plate 6 is in an unengaged state, and the moving sleeve 9 is in the upper position under the action of the return spring 21. During the downward movement of the moving sleeve 9, the top pressure shaft 11 in the moving groove 10 on its side wall contacts the clamping plate 6, applying inward pressure to the clamping plate 6. The clamping plate 6 rotates around the rotating shaft 5, and the tip part pries into the clamping groove 7 on the outer wall of the inner connecting tube 1, forming a mechanical lock. As the clamping pressure increases, the inner connecting tube 1 is further pushed towards the sealing ring 4. The sealing ring 4 deforms and fits tightly against the contact surface of the two tubes, forming an airtight and liquid-tight sealing structure. When rotated to the appropriate position, the spring rod 16 automatically extends into the mating hole 23 on the fixed ring 17, keeping the limit sleeve 12 in this position to prevent accidental loosening. When disassembly is required, the operator rotates the limit sleeve 12 in the opposite direction, the pressure plate 13 moves away from the pushed slope plate 14, and the moving sleeve 9 moves upward under the action of the return spring 21. The bottom pressure shaft 24 at the bottom of the moving sleeve 9 will push against the clamping plate 6, causing the clamping plate 6 to disengage from the clamping groove 7. At this time, the inner tube 1 and the outer tube 2 can be easily separated.

[0036] In summary, during use or operation of the overall equipment: When the pipe connection mechanism is required, it realizes the connection and sealing functions between pipes. When the inner pipe 1 is inserted into the outer pipe 2, the end of the inner pipe contacts the sealing ring 4 installed on the mounting slope 3 on the inner wall of the outer pipe. When the clamping pressure is applied, the end of the inner pipe 1 is pressed against the sealing ring 4, causing the sealing ring 4 to deform and fit tightly against the contact surface of the two pipes, forming a reliable sealing structure. The inclined surface design of the mounting slope 3 allows the sealing ring 4 to deform evenly under pressure, improving the sealing effect. In addition, the first connecting plate 18 and the second connecting plate 19 are respectively installed at the ends of the inner pipe 1 and the outer pipe 2, which facilitates connection with external pipes and expands the applicability of the pipe fittings.

[0037] When the clamping mechanism is in operation, it securely locks the inner tube 1 and the outer tube 2 together. Initially, the clamping plate 6 is installed in the mounting groove 8 on the side wall of the outer tube 2 via the rotating shaft 5, and is in an unengaged state. When the moving sleeve 9 moves downwards along the outer wall of the outer tube 2, the top pressure shaft 11 installed in the movement groove 10 on the side wall of the moving sleeve 9 contacts the clamping plate 6, applying inward pressure. Under this force, the clamping plate 6 rotates around the rotating shaft 5, and its tip pries into the clamping groove 7 on the outer wall of the inner tube 1. This mechanical engagement structure forms a secure lock, preventing the inner tube 1 from being pulled out of the outer tube 2. When the moving sleeve 9 moves upwards under the action of the return spring 21, the bottom pressure shaft 24 pushes against the clamping plate 6, causing the clamping plate 6 to disengage from the clamping groove 7, facilitating the disassembly of the fitting.

[0038] When the clamping auxiliary mechanism is in operation, the limiting sleeve 12 can be rotated at the limit on the outer wall of the connecting outer tube 2. The pressure plate 13 at its bottom contacts the push-receiving slope plate 14 at the top of the moving sleeve 9 during rotation. When the limiting sleeve 12 rotates, the inclined surface of the pressure plate 13 slides along the push-receiving slope plate 14, converting the rotational motion into the longitudinal movement of the moving sleeve 9. The rotating block 15 is installed on the top of the limiting sleeve 12 and engages with multiple sets of mating holes 23 on the fixing ring 17 through the spring rod 16 to achieve step-by-step positioning, so that the limiting sleeve 12 can be stably maintained in different rotational positions. The simple rotational operation is converted into precise clamping force, allowing the operator to achieve effective clamping with less force. At the same time, the step-by-step clamping design avoids insufficient or excessive clamping.

[0039] Insert the inner connecting tube 1 into the outer connecting tube 2, so that the end of the inner connecting tube 1 contacts the sealing ring 4 installed on the mounting slope 3. At this time, the clamping plate 6 is in an unengaged state, and the moving sleeve 9 is in the upper position under the action of the return spring 21. During the downward movement of the moving sleeve 9, the top pressure shaft 11 in the moving groove 10 on its side wall contacts the clamping plate 6, applying inward pressure to the clamping plate 6. The clamping plate 6 rotates around the rotating shaft 5, and the tip part pries into the clamping groove 7 on the outer wall of the inner connecting tube 1, forming a mechanical lock. As the clamping pressure increases, the inner connecting tube 1 is further pushed towards the sealing ring. 4. The sealing ring 4 deforms and fits tightly against the contact surface of the two tubes, forming an airtight and liquid-tight sealing structure. When rotated to the appropriate position, the spring rod 16 automatically extends into the mating hole 23 on the fixed ring 17, keeping the limiting sleeve 12 in this position to prevent accidental loosening. When disassembly is required, the operator rotates the limiting sleeve 12 in the opposite direction, the pressure plate 13 moves away from the pushed slope plate 14, and the moving sleeve 9 moves upward under the action of the return spring 21. The bottom pressure shaft 24 at the bottom of the moving sleeve 9 will push against the clamping plate 6, causing the clamping plate 6 to disengage from the clamping groove 7. At this time, the connecting inner tube 1 and the connecting outer tube 2 can be easily separated.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant and heat-insulating stainless steel press-fit pipe fitting, comprising a pipe connection mechanism, a press-fit mechanism, and a press-fit auxiliary mechanism, characterized in that: The pipe connection mechanism includes an inner connecting pipe (1), an outer connecting pipe (2), an installation slope (3), and a sealing ring (4). The inner connecting pipe (1) can extend into the outer connecting pipe (2). The installation slope (3) is set on the inner wall of the outer connecting pipe (2). The sealing ring (4) is installed on the installation slope (3), and one end of the inner connecting pipe (1) is pressed against the sealing ring (4) for sealing. The pressing mechanism includes a rotating shaft (5), a pressing plate (6), a pressing groove (7), an installation groove (8), a moving sleeve (9), a moving groove (10), and a top. The pressure shaft (11) and the mounting groove (8) are set on the side wall of the clamping pipe. The rotating shaft (5) is installed in the mounting groove (8). The clamping plate (6) is rotatably installed on the rotating shaft (5). The clamping groove (7) is set on the outer wall of the connecting inner pipe (1). The moving sleeve (9) is directionally moved and installed on the outer wall of the connecting outer pipe (2). The moving groove (10) is set on the side wall of the moving sleeve (9). The top pressure shaft (11) is installed at the top end of the moving groove (10). The moving sleeve (9) moves downward and the top pressure shaft (11) presses against the clamping plate (6).

2. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 1, characterized in that: The clamping auxiliary mechanism includes a limiting sleeve (12), a pressure plate (13), a push plate (14), a rotating block (15), a spring rod (16), and a fixing ring (17). The limiting sleeve (12) is installed on the outer wall of the connecting outer tube (2) to limit rotation. The push plate (14) is installed at the top end of the moving sleeve (9). The pressure plate (13) is installed at the bottom end of the limiting sleeve (12). The rotating pressure plate (13) presses against the push plate (14), causing the moving sleeve (9) to move longitudinally. The rotating block (15) is installed at the top end of the limiting sleeve (12). The fixing ring (17) is fixedly installed on the outer wall of the connecting outer tube (2). The spring rod (16) is installed on the rotating block (15).

3. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 1, characterized in that: One end of the connecting inner pipe (1) is equipped with a first connecting plate (18), which is connected to the external pipe.

4. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 1, characterized in that: One end of the connecting outer pipe (2) is equipped with a second connecting plate (19), and the second connecting plate (19) is connected to the external pipe.

5. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 1, characterized in that: A support plate (20) is installed at one end of the connecting outer tube (2), and a return spring (21) is installed at the top end of the support plate (20).

6. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 5, characterized in that: The bottom end of the movable sleeve (9) is provided with a spring groove (22), and one end of the reset spring (21) is connected to the top wall of the spring groove (22).

7. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 2, characterized in that: The fixed ring (17) has a mating hole (23), and there are multiple sets of mating holes (23), and the spring rod (16) can mat with the holes (23) one by one.

8. The anti-corrosion and heat-insulating stainless steel press-fit pipe fitting according to claim 5, characterized in that: The bottom end of the motion groove (10) is equipped with a bottom pressure shaft (24), and the reset spring (21) pushes the moving sleeve (9) and the bottom pressure shaft (24) against the clamping plate (6), so that the clamping plate (6) moves away from the clamping groove (7).

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