Field jointed, weldless, prefabricated corrosion resistant metal pipe

Abstract

The utility model discloses a kind of prefabricated anticorrosive metal pipelines of field connection welding-free, comprising: multiple anticorrosive metal pipe sections, the outside of first end is formed with anti-drop ring;Fixed sleeve, one end of fixed sleeve is fixedly sleeved in the outside of second end, fixed sleeve is formed with outer thread;Movable sleeve, one end of movable sleeve is movably sleeved in the outside of anti-drop ring, one end of movable sleeve extends to form inner edge plate towards inside, the other end of movable sleeve is formed with inner thread, in the other end of fixed sleeve of anticorrosive metal pipe section adjacent to first end insertion, the other end of movable sleeve is screwed in the other end of fixed sleeve of anticorrosive metal pipe section adjacent to allow the end face of the other end of fixed sleeve and inner edge plate respectively press in the opposite sides of anti-drop ring;Gasket ring, pad is between anti-drop ring and end face.The utility model solves the problem that ground source heat exchange pipe is connected by welding at construction site using standard pipe section, and there is the problem of short service life.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a prefabricated anti-corrosion metal pipe that can be connected on-site without welding. Background Technology

[0002] In recent years, with increasing emphasis on energy conservation and environmental protection, and the continuous development of ground source heat exchange technology, the requirements for corrosion protection of ground source heat exchange pipes have also been rising. Because manufacturers primarily produce standard pipe sections, which require on-site welding and subsequent anti-corrosion paint application, the corrosion protection at the joints of the ground source heat exchange pipes is weak. Under long-term erosion from groundwater, these joints are highly susceptible to rust and leakage, reducing service life and affecting functionality. To address these issues, a weld-free joint device for on-site connection of corrosion-resistant metal pipes has been designed. This device effectively avoids on-site welding of corrosion-resistant metal pipes, simplifies operation, accelerates construction efficiency, and simultaneously improves the durability of the joint, ensuring continued functionality.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a prefabricated anti-corrosion metal pipe that can be connected on-site without welding is provided to solve the problem of short service life caused by welding standard pipe sections on-site when using ground source heat exchange pipes.

[0005] To achieve the above objectives, a prefabricated corrosion-resistant metal pipe for field connection without welding is provided, comprising:

[0006] Multiple corrosion-resistant metal pipe sections, each having a first end and a second end opposite to each other, with an anti-detachment ring formed on the outside of the first end;

[0007] A fixed sleeve, one end of which is fixedly sleeved on the outside of the second end, and the fixed sleeve has an external thread;

[0008] A movable sleeve, one end of which is movably fitted onto the outside of the anti-detachment ring, one end of which extends inward to form an inner edge plate, and the other end of which has an internal thread. The first end is inserted into the other end of the fixed sleeve of the adjacent anti-corrosion metal pipe section, and the other end of the movable sleeve is screwed into the other end of the fixed sleeve of the adjacent anti-corrosion metal pipe section so that the end face of the other end of the fixed sleeve and the inner edge plate respectively press against the opposite sides of the anti-detachment ring.

[0009] A sealing gasket ring is placed between the anti-detachment ring and the end face.

[0010] Furthermore, the first end presses against the second end of the adjacent corrosion-resistant metal pipe section.

[0011] Furthermore, a sealing ring is provided between the first end and the second end of the adjacent anti-corrosion metal pipe section.

[0012] Furthermore, the movable sleeve is in the shape of a regular polygonal prism.

[0013] The beneficial effects of this utility model are that the prefabricated anti-corrosion metal pipe with no welding required for on-site connection is achieved by inserting the sealing gasket ring into the lower anti-corrosion metal pipe section, placing it between the fixed sleeve and the anti-detachment ring, and then inserting the anti-corrosion pipe into the sleeve. The movable sleeve is then tightened by threaded connection with the fixed sleeve, resulting in better sealing and bending resistance, and also achieving welding-free on-site connection of anti-corrosion metal pipes.

[0014] This utility model provides a prefabricated, weld-free, on-site-connection anti-corrosion metal pipeline. It is prefabricated in a factory, ensuring stable anti-corrosion treatment quality and convenient operation. This not only better guarantees the durability of the anti-corrosion pipeline connection and extends the service life of the anti-corrosion pipeline, but also improves the efficiency of on-site installation and connection. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a prefabricated anti-corrosion metal pipe that can be connected on-site without welding, according to an embodiment of this utility model.

[0017] Figure 2 This is a cross-sectional view of a prefabricated anti-corrosion metal pipe that can be connected on-site without welding, according to an embodiment of this utility model.

[0018] Figure 3 This is an exploded structural diagram of a prefabricated anti-corrosion metal pipe that can be connected on-site without welding, according to an embodiment of this utility model.

[0019] Figure 4 This is a schematic diagram of the sealing ring according to an embodiment of the present invention.

[0020] Figure label:

[0021] Corrosion-resistant metal pipe section 1; Anti-detachment ring 11;

[0022] Fixed sleeve 2;

[0023] 3. Movable sleeve; 31. Inner edge plate;

[0024] Sealing gasket ring 4;

[0025] 5. Sealing ring. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

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

[0028] Reference Figures 1 to 4 As shown, this utility model provides a prefabricated anti-corrosion metal pipe that can be connected on-site without welding, including: anti-corrosion metal pipe section 1, fixed sleeve 2, movable sleeve 3, and sealing gasket ring 4.

[0029] In this embodiment, there are multiple anti-corrosion metal pipe sections 1. During docking installation, the multiple anti-corrosion metal pipe sections are coaxially arranged. Each anti-corrosion metal pipe section 1 has a first end and a second end. An anti-detachment ring 11 is formed on the outside of the first end.

[0030] The inner diameter of the fixing sleeve 2 is adapted to the outer diameter of the corrosion-resistant metal pipe section. The outer diameter of the fixing sleeve is adapted to the outer diameter of the anti-detachment ring. One end of the fixing sleeve 2 is fixedly fitted onto the outside of the second end. The fixing sleeve 2 has external threads. One end of the fixing clamp is welded to the outside of the second end of the corrosion-resistant metal pipe section. The weld joint between the fixing clamp and the outside of the second end of the corrosion-resistant metal pipe section is prefabricated in the factory, and subsequent anti-corrosion treatment details are handled meticulously to ensure the normal performance of the corrosion-resistant metal pipe section.

[0031] The inner diameter of the movable sleeve 3 is adapted to the outer diameter of the fixed sleeve. One end of the movable sleeve 3 is movably fitted onto the outside of the anti-detachment ring 11. One end of the movable sleeve 3 extends inward to form an inner edge plate 31. The other end of the movable sleeve 3 has an internal thread.

[0032] The other end of the movable sleeve 3 is screwed into the other end of the fixed sleeve 2 of the adjacent anti-corrosion metal pipe section 1, so that the end face of the other end of the fixed sleeve 2 and the inner edge plate 31 press against the opposite sides of the anti-detachment ring 11 respectively.

[0033] As a preferred implementation method, the movable sleeve is in the shape of a regular polygonal prism. When connecting two adjacent anti-corrosion metal pipe sections, construction workers can complete the connection and installation of the anti-corrosion metal pipe sections by hand or with the aid of wrenches and other tools.

[0034] The sealing gasket 4 is placed between the anti-detachment ring 11 and the end face.

[0035] See Figure 2 As shown, after two adjacent anti-corrosion metal pipe sections 1 are joined together, the first end of one anti-corrosion metal pipe section 1 presses against the second end of the adjacent anti-corrosion metal pipe section 1.

[0036] As a preferred implementation method, see [reference]. Figure 2 and Figure 4 As shown, a sealing ring 5 is provided between the first end of a corrosion-resistant metal pipe section 1 and the second end of an adjacent corrosion-resistant metal pipe section 1.

[0037] In this embodiment, an annular groove is formed on the inner wall of the fixing sleeve. The annular groove is arranged in a circle along the circumference of the fixing sleeve. The annular groove is aligned with the sealing ring. An circumferential cavity is formed inside the sealing ring. The circumferential cavity is a sealing cavity. The circumferential cavity is arranged in a circle along the circumference of the sealing ring. The circumferential cavity has an outer side close to the fixing sleeve and an inner side away from the fixing sleeve. The inner side of the annular cavity is located between the end faces of the two corrosion-resistant metal pipe sections. When the two adjacent corrosion-resistant metal pipe sections are joined, the sealing ring is compressed, causing the outer edge of the sealing ring to extend into and completely fill the annular groove. The gas inside the circumferential cavity of the sealing ring is compressed to the outer side of the circumferential cavity, causing the outer edge of the sealing ring to expand and press against the groove wall of the annular groove, improving airtightness.

[0038] In this invention, the upper and lower anti-corrosion metal pipe sections of the prefabricated anti-corrosion metal pipe are inserted into the fixed sleeve for a certain length, resulting in better bending resistance. Furthermore, the joint anti-corrosion treatment of the upper anti-corrosion metal pipe section and the fixed sleeve after welding at the fixed sleeve weld joint in the processing plant further enhances the anti-corrosion effect at the connection.

[0039] In some embodiments, the inner diameter of the fixed sleeve is slightly larger than the outer diameter of the upper anti-corrosion pipe to facilitate the insertion of the upper and lower anti-corrosion metal pipe sections. The lower part of the fixed sleeve is threaded to form an external thread, the size and length of which correspond to the internal threads of the movable sleeve, ensuring that the movable sleeve can be smoothly screwed in.

[0040] The sealing gasket ring is placed on the outside of the lower anti-corrosion metal pipe section and on the top surface of the anti-detachment ring. It serves to seal the connection between the fixing sleeve and the anti-detachment ring, preventing leakage at the joint.

[0041] The outer diameter of the anti-slip ring is slightly smaller than the inner diameter of the movable sleeve to ensure that the threaded section of the movable sleeve can smoothly slide past the anti-slip ring. The inner diameter of the anti-slip ring is slightly larger than the outer diameter of the lower anti-corrosion metal pipe section to facilitate the anti-slip ring being fitted into the designated position on the lower anti-corrosion metal pipe section. The anti-slip ring and the lower anti-corrosion metal pipe section are welded together at the weld joint in the processing plant, and then subjected to joint anti-corrosion treatment to improve the corrosion protection effect at the connection.

[0042] The internal threads of the movable sleeve correspond to the external threads of the fixed sleeve, and can be tightened using common tools such as wrenches, making the operation simple.

[0043] The inner diameter of the inner edge plate at the bottom of the movable sleeve is slightly larger than that of the anti-corrosion pipe, which facilitates its sliding adjustment up and down to the anti-detachment ring. After the movable sleeve is tightened, the anti-detachment ring limits the insertion of the upper anti-corrosion metal pipe section, thus ensuring that the connection is more secure.

[0044] By using tools to rotate the movable sleeve around its axis, the threaded connection between the movable sleeve and the fixed sleeve is made tight. This effectively solves the connection problem when the upper and lower anti-corrosion metal pipe sections are difficult to rotate. It also achieves no welding on the construction site, minimizes damage to the anti-corrosion layer, facilitates the connection of anti-corrosion pipelines on site, and speeds up construction efficiency.

[0045] This utility model provides a method for connecting prefabricated anti-corrosion metal pipes on-site without welding, including the following steps:

[0046] Select a fixed sleeve with a suitable inner diameter and thickness based on the outer diameter and thickness of the upper and lower anti-corrosion metal pipe sections.

[0047] Based on the insertion lengths of the upper and lower anti-corrosion metal pipe sections, determine the length of the fixing sleeve and cut it accordingly;

[0048] The provided fixing sleeve has an external thread drilled at one end. The size and length of the external thread are designed according to requirements.

[0049] After the provided upper anti-corrosion metal pipe section is inserted into the other end of the fixed sleeve for the designed length, it is fully welded through the weld joint of the fixed sleeve.

[0050] The anti-corrosion metal pipe section above and the fixed sleeve welded after threading are both treated with anti-corrosion at the processing plant.

[0051] Based on the outer diameter of the next anti-corrosion metal pipe section and the thickness of the fixing sleeve, select a sealing gasket with appropriate thickness and width.

[0052] Based on the outer diameter of the next section of anti-corrosion metal pipe, determine the opening size and thickness of the inner edge plate of the movable sleeve; based on the thread size and length of the movable sleeve, and with a certain length of thread and anti-disengagement ring reserved, determine the length and thickness of the movable sleeve, and perform integrated processing of the movable sleeve and the inner edge plate.

[0053] After the movable sleeve is treated with anti-corrosion, it is inserted into the next anti-corrosion metal pipe section in the correct direction before the anti-loosening ring is inserted.

[0054] Based on the outer diameter of the lower anti-corrosion metal pipe section and the inner diameter of the movable sleeve, select an anti-detachment ring with an inner diameter slightly larger than the outer diameter of the lower anti-corrosion metal pipe section and an outer diameter slightly smaller than the inner diameter of the movable sleeve. The length is determined according to the reserved length during the processing of the movable sleeve.

[0055] After the anti-detachment ring is inserted into the designed position, it is fully welded to the next anti-corrosion metal pipe section through the anti-detachment ring weld joint.

[0056] The next section of the anti-corrosion metal pipe section and the anti-detachment welding parts are treated together with anti-corrosion measures;

[0057] During connection, align the centers of the upper and lower anti-corrosion metal pipe sections and temporarily fix them, allowing the pipe to slide along the axis. Place the sealing gasket ring on the outside of the lower anti-corrosion metal pipe section and slide it down to the top surface of the anti-loosening ring. Insert the reserved part of the lower anti-corrosion metal pipe section into the fixed sleeve. Slide the movable sleeve to the external thread and tighten it with a tool. This achieves on-site connection of the anti-corrosion metal pipe without welding.

[0058] This utility model provides a prefabricated anti-corrosion metal pipe that can be connected on-site without welding. By inserting a sealing gasket ring into the lower anti-corrosion metal pipe section and placing it between the fixed sleeve and the anti-detachment ring, the anti-corrosion pipe is then inserted into the sleeve. The movable sleeve is then connected to the fixed sleeve by threaded tightening, resulting in better sealing and bending resistance. This also enables welding-free on-site connection of anti-corrosion metal pipes.

[0059] This utility model provides a prefabricated, weld-free, on-site-connected anti-corrosion metal pipeline. It is prefabricated in a factory, ensuring stable anti-corrosion treatment quality and convenient operation. It not only better guarantees the durability of the anti-corrosion pipeline connection but also improves the efficiency of on-site installation and connection.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A prefabricated corrosion-resistant metal pipe that can be connected on-site without welding, characterized in that, include: Multiple corrosion-resistant metal pipe sections, each having a first end and a second end opposite to each other, with an anti-detachment ring formed on the outside of the first end; A fixed sleeve, one end of which is fixedly sleeved on the outside of the second end, and the fixed sleeve has an external thread; A movable sleeve, one end of which is movably fitted onto the outside of the anti-detachment ring, one end of which extends inward to form an inner edge plate, and the other end of which has an internal thread. The first end is inserted into the other end of the fixed sleeve of the adjacent anti-corrosion metal pipe section, and the other end of the movable sleeve is screwed into the other end of the fixed sleeve of the adjacent anti-corrosion metal pipe section so that the end face of the other end of the fixed sleeve and the inner edge plate respectively press against the opposite sides of the anti-detachment ring. A sealing gasket ring is placed between the anti-detachment ring and the end face.

2. The prefabricated anti-corrosion metal pipeline for on-site connection without welding according to claim 1, characterized in that, The first end presses against the second end of the adjacent corrosion-resistant metal pipe section.

3. The prefabricated anti-corrosion metal pipeline for on-site connection without welding according to claim 2, characterized in that, A sealing ring is provided between the first end and the second end of the adjacent anti-corrosion metal pipe section.

4. The prefabricated anti-corrosion metal pipeline for field connection without welding according to claim 1, characterized in that, The movable sleeve is in the shape of a regular polygonal prism.

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