A corrosion-resistant pipe connection device

Abstract

This utility model discloses a corrosion-resistant pipe connection device, which relates to the field of pipe processing technology. The device includes a first pipe and a second pipe, with the inner walls of the first and second pipes in contact. A corrosion-resistant device is inserted between the first and second pipes. Through the combination of the corrosion-resistant device and the fixing device, this corrosion-resistant pipe connection device exhibits excellent corrosion resistance. Its ring body is made of stainless steel, the rubber ring is PTFE-coated rubber, and the barrier body is epoxy resin, all highly corrosion-resistant materials. The corrosion-resistant device is inserted between the two pipes, with the ring body fitting against the outer wall of the pipe, and the rubber ring and barrier body clamping against the inner wall of the pipe, forming an inner and outer wrapping structure. This can block the contact gaps between corrosive media. The rubber ring can elastically deform and tightly fit against the inner wall of the pipe. The expanded graphite placed inside can expand and seal leakage channels when exposed to trace amounts of media, preventing secondary corrosion caused by media leakage.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, specifically to a corrosion-resistant pipe connection device. Background Technology

[0002] In industrial fields such as petrochemicals, seawater desalination, and acid and alkali transportation, the corrosion resistance and structural reliability of pipeline connection devices directly determine the system safety and service life.

[0003] While mainstream pipe connection methods such as flange connections, welding connections, and threaded connections are mature in conventional scenarios, they still have significant technical shortcomings under strong corrosion and dynamic operating conditions. Most connection components are made of ordinary carbon steel or a single metal material, lacking targeted corrosion-resistant design. Under the action of corrosive media such as acids, alkalis, and salt spray, they are prone to rust and pitting corrosion. At the same time, the gap structure of the connection parts is prone to the accumulation of corrosive media, forming a localized corrosive environment, which can lead to the failure of the device in a short period of time. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, this utility model provides a corrosion-resistant pipe connection device, which solves the problems of insufficient corrosion resistance, unreliable sealing, and complicated installation and maintenance.

[0006] (II) Technical Solution

[0007] To solve the above problems, this utility model is implemented through the following technical solution: a corrosion-resistant pipe connection device, comprising: a first pipe and a second pipe, the inner walls of the first pipe and the second pipe being in contact, a corrosion-resistant device being inserted between the first pipe and the second pipe, a fixing device being slidably connected to the outer walls of the first pipe and the second pipe, the corrosion-resistant device comprising a ring body, a rubber ring being bonded to the side wall of the ring body, expanded graphite being placed on the inner wall of the rubber ring, and a barrier being bonded to the end of the rubber ring away from the ring body.

[0008] Preferably, the ring body is made of stainless steel, the rubber ring is made of PTFE-coated rubber, and the barrier is made of epoxy resin. The ring body of the corrosion-resistant device is made of stainless steel, the rubber ring is made of PTFE-coated rubber, and the barrier is made of epoxy resin. All three are typical corrosion-resistant materials that can withstand the erosion of corrosive media such as acids, alkalis, and salt spray, thus avoiding the rust problem caused by the non-corrosion-resistant materials of traditional metal connecting parts.

[0009] Preferably, the upper and lower ends of the ring body are in contact with the outer walls of the first and second pipes, and the outer walls of the rubber ring and the barrier body are symmetrically engaged with the inner walls of the first and second pipes. The corrosion-resistant device is inserted between the first and second pipes, and its rubber ring and barrier body are symmetrically engaged with the inner walls of the pipes. The upper and lower ends of the ring body are in contact with the outer walls of the pipes, forming an "inner and outer wrapping" barrier structure, which can effectively block the contact between the corrosive medium and the pipe connection gaps, cutting off the occurrence of local corrosion from the path.

[0010] Preferably, the fixing device includes two limiting semicircular rings. The outer wall of each limiting semicircular ring is rotatably connected to a rotating frame, and the inner wall of the rotating frame is slidably connected to a sliding strip. The outer wall of the sliding strip is symmetrically fixedly connected to a compression spring. The two limiting semicircular rings can slide directly along the outer wall of the pipe to the connection position. Through the cooperation of the sliding strip in the rotating frame and the compression spring, the elastic force of the compression spring pushes the sliding strip to lock the limiting semicircular ring, eliminating the need for complex tools such as bolts and achieving tool-free quick installation.

[0011] Preferably, the outer wall of the limiting semicircular ring is in contact with the sliding bar, the arc of the sliding bar is engaged with the outer wall of the limiting semicircular ring, and the end of the compression spring away from the sliding bar is fixedly connected to the outer wall of the rotating frame.

[0012] Preferably, the outer walls of the first pipe and the second pipe are slidably connected to the inner wall of the limiting semicircular ring, and the side wall of the ring body is in contact with the inner wall of the limiting semicircular ring.

[0013] Beneficial effects

[0014] This utility model provides a corrosion-resistant pipe connection device. It has the following beneficial effects:

[0015] This utility model, through the combination of a corrosion-resistant device and a fixing device, provides excellent corrosion resistance for the pipeline connection device. The ring body is made of stainless steel, the rubber ring is PTFE-coated rubber, and the barrier body is epoxy resin—all highly corrosion-resistant materials. The corrosion-resistant device is inserted between two pipes, with the ring body fitting against the outer wall of the pipe and the rubber ring and barrier body engaging with the inner wall of the pipe, forming an inner and outer encapsulation structure. This effectively blocks contact gaps between corrosive media and the connection seams. The rubber ring can elastically deform to tightly fit the inner wall of the pipe, and the expanded graphite placed inside can expand and seal leakage channels when exposed to trace amounts of media, preventing secondary corrosion caused by media leakage. The fixing device uses a semi-circular ring splicing system, relying on a sliding strip and compression spring within the rotating frame to achieve elastic engagement. Installation is quick and requires no complex tools, and the semi-circular ring is easy to disassemble during maintenance, without easily scratching the sealing surface or damaging the anti-corrosion coating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the corrosion-resistant device of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0020] Figure 5 This is a schematic diagram of the fixing device of this utility model;

[0021] Figure 6 This is an exploded structural diagram of the fixing device of this utility model.

[0022] In the diagram: 1. First pipe; 2. Second pipe; 3. Corrosion-resistant device; 30. Ring body; 31. Rubber ring; 32. Expanded graphite; 33. Barrier body; 4. Fixing device; 40. Limiting semi-circular ring; 41. Rotating frame; 42. Sliding bar; 43. Compression spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] Please see Figures 1-6 This utility model provides a technical solution: a corrosion-resistant pipe connection device, comprising:

[0026] First pipe 1, second pipe 2, the inner walls of first pipe 1 and second pipe 2 are in contact, a corrosion-resistant device 3 is inserted between first pipe 1 and second pipe 2, and a fixing device 4 is slidably connected to the outer walls of first pipe 1 and second pipe 2. First, the pipes are connected and the corrosion-resistant structure is arranged. The inner walls of first pipe 1 and second pipe 2 are fitted together. The corrosion-resistant device 3 is inserted between the two pipes. Then, the connection is fixed by fixing device 4.

[0027] The corrosion-resistant device 3 includes a ring 30, with a rubber ring 31 bonded to the side wall of the ring 30. Expanded graphite 32 is placed on the inner wall of the rubber ring 31. A barrier 33 is bonded to the end of the rubber ring 31 furthest from the ring 30. The ring 30 is made of stainless steel, the rubber ring 31 is made of PTFE-coated rubber, and the barrier 33 is made of epoxy resin. The upper and lower ends of the ring 30 are in contact with the outer walls of the first pipe 1 and the second pipe 2. The outer walls of the rubber ring 31 and the barrier 33 are symmetrically engaged with the inner walls of the first pipe 1 and the second pipe 2. Initially, the ring 30 of the corrosion-resistant device 3 contacts the outer walls of the two pipes, while the rubber ring 31 and the barrier 33 are symmetrically engaged with the inner walls of the pipes, forming a preliminary positioning structure of outer wall support and inner wall contact. The ring 30 is made of stainless steel, and the rubber ring 31 is made of PTF. E is covered with rubber, and the barrier 33 is made of epoxy resin. These three materials are inherently resistant to corrosive media such as acids, alkalis, and salt spray, and can directly resist the erosion of the connecting parts by the media. At the same time, the inner and outer wrapping structure formed by the ring 30, the rubber ring 31, and the barrier 33 can block the contact path between the corrosive media and the pipe connection gap, reducing the occurrence of local corrosion from the source. The rubber ring 31, with its excellent elastic deformation ability, fits tightly against the inner wall of the pipe, filling the tiny gaps when the pipe is connected, forming a preliminary seal. If there is a trace amount of media penetration, the expanded graphite 32 on the inner wall of the rubber ring 31 will come into contact with the media and expand slightly, further sealing the leakage channel. This not only prevents the corrosive media in the pipe from leaking to the connection part and causing external corrosion, but also prevents external moisture and oxygen from entering the pipe and aggravating the corrosion of the inner wall.

[0028] The fixing device 4 includes two limiting semicircular rings 40. A rotating frame 41 is rotatably connected to the outer wall of each limiting semicircular ring 40. A sliding strip 42 is slidably connected to the inner wall of the rotating frame 41. Compression springs 43 are symmetrically fixed to the outer walls of the sliding strips 42. The outer walls of the limiting semicircular rings 40 are in contact with each other. The arc of the sliding strip 42 engages with the outer wall of the limiting semicircular rings 40. The end of the compression spring 43 away from the sliding strip 42 is fixedly connected to the outer wall of the rotating frame 41. The outer walls of the first pipe 1 and the second pipe 2 are slidably connected to the inner wall of the limiting semicircular rings 40. The side wall of the ring body 30 is connected to the limiting semicircular rings 40. The inner walls of the pipes are brought into contact. Then, the two limiting semicircular rings 40 are slid along the outer wall of the pipe to the connection position. Under the elastic force of the compression spring 43, the sliding strip 42 in the rotating frame 41 is engaged with the outer wall of the limiting semicircular ring 40 at its arc, thus securing the pipe connection. The installation can be completed without relying on complex tools. When the pipe undergoes slight displacement due to temperature changes or vibration, the compression spring 43 can provide continuous elastic clamping force to push the sliding strip 42 to adaptively adjust the clamping position, avoiding structural deformation caused by rigid fixing. At the same time, it ensures a tight fit between the corrosion-resistant device 3 and the pipe, preventing displacement from creating new connection seams.

[0029] When in use, firstly, pipes are connected and corrosion-resistant structures are arranged. The inner walls of the first pipe 1 and the second pipe 2 are fitted together, and a corrosion-resistant device 3 is inserted between the two pipes. Then, the connection is fixed by the fixing device 4.

[0030] First, the ring 30 of the corrosion-resistant device 3 contacts the outer wall of the two pipes, while the rubber ring 31 and the barrier 33 are symmetrically engaged with the inner wall of the pipes, forming a preliminary positioning structure of outer wall support and inner wall fit. The ring 30 is made of stainless steel, the rubber ring 31 is PTFE-coated rubber, and the barrier 33 is epoxy resin. These three materials themselves have the characteristics of resisting corrosive media such as acids, alkalis, and salt spray, and can directly resist the erosion of the connecting parts by the media. At the same time, the inner and outer wrapping structure formed by the ring 30, the rubber ring 31, and the barrier 33 can block the contact path between the corrosive media and the pipe connection gap, reducing the occurrence of local corrosion from the source. The rubber ring 31, with its excellent elastic deformation ability, fits tightly with the inner wall of the pipe, filling the tiny gap when the pipes are joined, forming a preliminary seal. If there is a trace amount of media penetration, the expanded graphite 32 on the inner wall of the rubber ring 31 will contact the media and expand slightly, further sealing the leakage channel. This not only prevents the corrosive media in the pipe from leaking to the connection part and causing external corrosion, but also prevents external moisture and oxygen from entering the pipe and aggravating the corrosion of the inner wall.

[0031] Subsequently, the two limiting semicircular rings 40 are slid along the outer wall of the pipe to the connection position. Under the elastic force of the compression spring 43, the sliding strip 42 in the rotating frame 41 engages with the outer wall of the limiting semicircular ring 40 at its arc, thus securing the pipe connection. Installation can be completed without relying on complex tools. When the pipe undergoes slight displacement due to temperature changes or vibration, the compression spring 43 can provide continuous elastic clamping force, pushing the sliding strip 42 to adaptively adjust the clamping position, avoiding structural deformation caused by rigid fixing, and ensuring a tight fit between the corrosion-resistant device 3 and the pipe, preventing displacement from creating new connection gaps.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant pipe connection device, comprising: The first pipe (1) and the second pipe (2) are characterized by: The inner walls of the first pipe (1) and the second pipe (2) are in contact with each other, a corrosion-resistant device (3) is inserted between the first pipe (1) and the second pipe (2), and a fixing device (4) is slidably connected to the outer walls of the first pipe (1) and the second pipe (2). The corrosion-resistant device (3) includes a ring body (30), a rubber ring (31) is bonded to the side wall of the ring body (30), expanded graphite (32) is placed on the inner wall of the rubber ring (31), and a barrier body (33) is bonded to the end of the rubber ring (31) away from the ring body (30).

2. The corrosion-resistant pipe connection device according to claim 1, characterized in that: The ring body (30) is made of stainless steel, the rubber ring (31) is made of PTFE-coated rubber, and the barrier body (33) is made of epoxy resin.

3. The corrosion-resistant pipe connection device according to claim 1, characterized in that: The upper and lower ends of the ring (30) are in contact with the outer walls of the first pipe (1) and the second pipe (2), and the outer walls of the rubber ring (31) and the barrier (33) are symmetrically engaged with the inner walls of the first pipe (1) and the second pipe (2).

4. The corrosion-resistant pipe connection device according to claim 1, characterized in that: The fixing device (4) includes a limiting semicircular ring (40), and there are two limiting semicircular rings (40). The outer wall of the limiting semicircular ring (40) is rotatably connected to a rotating frame (41), and the inner wall of the rotating frame (41) is slidably connected to a sliding strip (42). The outer wall of the sliding strip (42) is symmetrically fixedly connected to a compression spring (43).

5. A corrosion-resistant pipe connection device according to claim 4, characterized in that: The outer wall of the limiting semicircular ring (40) is in contact with the outer wall of the limiting semicircular ring (40), the arc of the sliding bar (42) is engaged with the outer wall of the limiting semicircular ring (40), and the end of the compression spring (43) away from the sliding bar (42) is fixedly connected to the outer wall of the rotating frame (41).

6. The corrosion-resistant pipe connection device according to claim 1, characterized in that: The outer walls of the first pipe (1) and the second pipe (2) are slidably connected to the inner wall of the limiting semicircular ring (40), and the side wall of the ring body (30) is in contact with the inner wall of the limiting semicircular ring (40).

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