Pipeline connecting mechanism for electric heating pipe

Abstract

The utility model relates to a pipeline connecting mechanism for an electric heating pipe, which comprises a first flange piece and a second flange piece, the first flange piece comprises a first fixing part and a first connecting part, and the second flange piece comprises a second fixing part and a second connecting part; the first fixing part comprises two first fixing half rings, a first fixing block is arranged on the outer wall of the inner pipe, and a first fixing groove is formed in the side wall of each first fixing half ring; first fixing plates are arranged at the two ends of the first fixing half ring, and every two adjacent first fixing plates are connected through a first fixing bolt; the second fixing part comprises two second fixing half rings, a second fixing block is arranged on the outer wall of the pipeline, and a second fixing groove is formed in the side wall of each second fixing half ring; second fixing plates are arranged at the two ends of the second fixing half ring, and every two adjacent second fixing plates are connected through a second fixing bolt. The first connecting part and the second connecting part are connected through a connecting assembly. The pipeline connecting mechanism can be repeatedly used, and economic benefits are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a pipeline connection mechanism for an electric heating pipe. Background Art

[0002] Heating devices are often used in places that require long-term heating, such as energy storage power stations and solar power stations. In these places, heating devices such as PTC electric heating tubes are usually used for heating. The PTC heating element has a constant temperature heating characteristic. After power is turned on, the self-heating temperature rises and the resistance value increases and enters the transition zone, so that the surface temperature of the PTC heating element will remain constant, thereby heating the liquid to be heated inside the inner tube of the heating device at a constant temperature.

[0003] The PTC electric heating tube includes an inner tube for liquid to flow through, and flanges are connected at both ends of the inner tube. The two ends of the inner tube are butt-jointed with corresponding pipelines through the flanges.

[0004] The flange includes two flange pieces, each of which includes a fixing portion fixed to a pipeline and a connecting portion connected to another flange piece. Traditionally, the fixing portion of the flange piece and the pipeline is fixed by welding, which makes the flange only usable on one set of pipelines and cannot be reused. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a pipeline connection mechanism for an electric heating pipe.

[0006] The present application provides a pipe connection mechanism for an electric heating pipe using the following technical solution:

[0007] A pipe connection mechanism for an electric heating pipe comprises a first flange and a second flange, wherein the first flange comprises a first fixing portion and a first connecting portion, and the second flange comprises a second fixing portion and a second connecting portion;

[0008] The first fixing part includes two first fixing half rings, a first fixing block is arranged on the outer wall of the inner tube, the first fixing block is symmetrically arranged along the radial direction of the inner tube, and a first fixing groove for the first fixing block to pass through is opened on the side wall of the first fixing half ring; first fixing plates are arranged at both ends of the first fixing half ring, and two adjacent first fixing plates are connected by a first fixing bolt, and the first fixing bolt passes through the two first fixing plates and is threadedly connected with a first fixing nut;

[0009] The second fixing part includes two second fixing half rings, a second fixing block is arranged on the outer wall of the pipeline, the second fixing block is symmetrically arranged along the radial direction of the pipeline, and a second fixing groove for the second fixing block to pass through is opened on the side wall of the second fixing half ring; second fixing plates are arranged at both ends of the second fixing half ring, and two adjacent second fixing plates are connected by second fixing bolts, and the second fixing bolts pass through the two second fixing plates and are threadedly connected with second fixing nuts;

[0010] The first connection portion and the second connection portion are connected via a connection assembly.

[0011] Preferably, the first connecting portion comprises two first connecting half rings, wherein a first connecting block is arranged on a surface of one of the first connecting half rings close to the other first connecting half ring, and a first connecting groove for the first connecting block to penetrate is opened on the other first connecting half ring;

[0012] The second connecting portion includes two second connecting half rings, wherein a second connecting block is arranged on a surface of one of the second connecting half rings close to the other second connecting half ring, and a second connecting groove for the second connecting block to penetrate is opened on the other second connecting half ring.

[0013] Preferably, the first connecting block and the second connecting block are both covered with friction pads, and the friction pads are interference fit with the inner circumferential walls of the corresponding first connecting groove and the second connecting groove.

[0014] Preferably, six groups of the connecting components are equidistantly arranged along the circumference of the first connecting part, and the connecting components include connecting bolts and connecting nuts. The connecting bolts pass through the first connecting part and the second connecting part and are threadedly connected to the connecting nuts. The connecting nuts are tightly pressed against a side of the second connecting part facing away from the first connecting part.

[0015] Preferably, a first sealing ring is provided on a side of the first connecting part close to the second connecting part, a first sealing ring groove for the first sealing ring to penetrate is opened on a side of the second connecting part close to the first connecting part, and the first sealing ring is interference fit with the inner wall of the first sealing ring groove.

[0016] Preferably, a second sealing ring is provided on a side of the second connection part close to the first connection part, a second sealing ring groove for the second sealing ring to penetrate is opened on a side of the first connection part close to the second connection part, and the second sealing ring is interference fit with the inner wall of the second sealing ring groove.

[0017] Preferably, the first sealing ring and the second sealing ring are staggered and arranged close to each other.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. The first flange and the inner tube are detachably connected, and the second flange and the inner tube are detachably connected, so that the first flange and the second flange can be reused, thereby improving economic benefits;

[0020] 2. The provision of the first sealing ring and the second sealing ring improves the sealing performance between the first connecting part and the second connecting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a pipe connection mechanism for an electric heating pipe in an embodiment of the present application.

[0022] Figure 2 It is a schematic cross-sectional structure diagram used to illustrate the pipeline connection mechanism in the embodiment of the present application.

[0023] Figure 3 It is a schematic diagram of the exploded structure used to show the inner tube and the first flange in the embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the exploded structure used to show the pipeline and the second flange in the embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of the structure of the first sealing ring used to illustrate the embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the structure of the second sealing ring used to illustrate the embodiment of the present application.

[0027] Explanation of reference numerals: 1. first flange; 11. first fixing portion; 111. first fixing half ring; 112. first fixing plate; 113. first fixing bolt; 114. first fixing nut; 12. first connecting portion; 121. first connecting half ring; 122. first connecting block; 123. first connecting groove; 2. second flange; 21. second fixing portion; 211. second fixing half ring; 212. second fixing plate; 213. second fixing bolt; 214. second fixing nut; 22. second connecting portion ; 221, second connecting half ring; 222, second connecting block; 223, second connecting groove; 3, inner tube; 31, first fixing block; 311, first fixing groove; 4, pipeline; 41, second fixing block; 411, second fixing groove; 5, connecting assembly; 51, connecting bolt; 52, connecting nut; 6, first sealing ring; 61, first sealing half ring; 7, first sealing ring groove; 71, first semi-ring groove; 8, second sealing ring; 81, second sealing half ring; 9, second sealing ring groove; 91, second semi-ring groove. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-6 This application is described in further detail.

[0029] The embodiment of the present application discloses a pipe connection mechanism for an electric heating pipe.

[0030] Reference Figure 1-6 The pipeline connection mechanism for the electric heating pipe includes a first flange 1 and a second flange 2. The first flange 1 includes a first fixing portion 11 and a first connecting portion 12. The second flange 2 includes a second fixing portion 21 and a second connecting portion 22.

[0031] The first fixing portion 11 includes two first fixing half rings 111, a first fixing block 31 is arranged on the outer wall of the inner tube 3, the first fixing block 31 is symmetrically arranged along the radial direction of the inner tube 3, and a first fixing groove 311 for the first fixing block 31 to pass through is opened on the side wall of the first fixing half ring 111; first fixing plates 112 are arranged at both ends of the first fixing half ring 111, and two adjacent first fixing plates 112 are connected by a first fixing bolt 113, and the first fixing bolt 113 passes through the two first fixing plates 112 and is threadedly connected with a first fixing nut 114.

[0032] The second fixing portion 21 includes two second fixing half rings 211. A second fixing block 41 is arranged on the outer wall of the pipe 4. The second fixing block 41 is symmetrically arranged along the radial direction of the pipe 4. A second fixing groove 411 for the second fixing block 41 to pass through is opened on the side wall of the second fixing half ring 211; second fixing plates 212 are arranged at both ends of the second fixing half ring 211, and two adjacent second fixing plates 212 are connected by second fixing bolts 213. The second fixing bolts 213 pass through the two second fixing plates 212 and are threadedly connected with second fixing nuts 214.

[0033] The first connecting portion 12 includes two first connecting half rings 121, which correspond to the first fixing half ring 111 one by one and are fixedly connected. A first connecting block 122 is provided on a surface of one of the first connecting half rings 121 close to the other first connecting half ring 121, and a first connecting groove 123 is provided on the other first connecting half ring 121 for the first connecting block 122 to penetrate.

[0034] The second connecting portion 22 includes two second connecting half rings 221, which correspond to the second fixing half ring 211 one by one and are fixedly connected. A second connecting block 222 is provided on a surface of one of the second connecting half rings 221 close to the other second connecting half ring 221, and a second connecting groove 223 for the second connecting block 222 to penetrate is opened on the other second connecting half ring 221.

[0035] The first connecting block 122 and the second connecting block 222 are both covered with friction pads, which are interference fit with the inner walls of the corresponding first connecting grooves 123 and second connecting grooves 223, so that the two first connecting half rings 121 of the first connecting part 12 and the two second connecting half rings 221 of the second connecting part 22 can be initially positioned.

[0036] When connecting the inner tube 3 and the first fixing part 11, the two first fixing half rings 111 of the first fixing part 11 are moved along the radial direction of the inner tube 3 so that the first fixing block 31 passes through the first fixing groove 311 and the first connecting block 122 passes through the first connecting groove 123, and then the first fixing bolt 113 passes through the two first fixing plates 112, and the first fixing nut 114 is threadedly connected to the first fixing bolt 113 and pressed against the first fixing plate 112, so that the first flange 1 and the inner tube 3 can be detachably connected, so that the first flange 1 can be reused, thereby improving economic benefits.

[0037] When connecting the pipeline 4 and the second fixing part 21, the two second fixing half rings 211 of the second fixing part 21 are moved along the radial direction of the inner tube 3 so that the second fixing block 41 passes through the second fixing groove 411 and the second connecting block 222 passes through the second connecting groove 223, and then the second fixing bolt 213 passes through the two second fixing plates 212, and the second fixing nut 214 is threadedly connected to the second fixing bolt 213 and pressed against the second fixing plate 212, so that the second flange 2 and the inner tube 3 can be detachably connected, so that the second flange 2 can be reused, thereby improving economic benefits.

[0038] The first connection part 12 and the second connection part 22 are connected by the connection assembly 5. Six groups of the connection assembly 5 are arranged equidistantly along the circumference of the first connection part 12, and three groups are arranged on each first connection half ring 121 accordingly.

[0039] The connecting assembly 5 includes a connecting bolt 51 and a connecting nut 52. The connecting bolt 51 passes through the first connecting part 12 and the second connecting part 22 and is threadedly connected to the connecting nut 52. The connecting nut 52 is pressed against a side of the second connecting part 22 facing away from the first connecting part 12, thereby fixing the first connecting part 12 and the second connecting part 22.

[0040] A first sealing ring 6 is provided on one surface of the first connecting portion 12 close to the second connecting portion 22, and a first sealing ring groove 7 for the first sealing ring 6 to penetrate is opened on one surface of the second connecting portion 22 close to the first connecting portion 12. The first sealing ring 6 is interference fit with the inner wall of the first sealing ring groove 7. The first sealing ring 6 includes two first sealing half rings 61, and the first sealing ring groove 7 includes two first half ring grooves 71. The first half ring grooves 71 correspond one-to-one to the first sealing half rings 61.

[0041] A second sealing ring 8 is provided on one side of the second connection part 22 close to the first connection part 12, and a second sealing ring groove 9 is provided on one side of the first connection part 12 close to the second connection part 22 for the second sealing ring 8 to penetrate. The second sealing ring 8 is interference fit with the inner wall of the second sealing ring groove 9, and the second sealing ring 8 includes two second sealing semi-rings 81, and the second sealing ring groove 9 includes two second semi-ring grooves 91, and the second semi-ring grooves 91 correspond to the second sealing semi-rings 81 one by one. The first sealing ring 6 and the second sealing ring 8 are staggered and arranged close to each other.

[0042] The provision of the first sealing ring 6 and the second sealing ring 8 improves the sealing performance between the first connecting portion 12 and the second connecting portion 22 .

[0043] The implementation principle of a pipe connection mechanism for an electric heating pipe in the embodiment of the present application is as follows:

[0044] When connecting the inner tube 3 and the first fixing part 11, the two first fixing half rings 111 of the first fixing part 11 are moved along the radial direction of the inner tube 3 so that the first fixing block 31 passes through the first fixing groove 311 and the first connecting block 122 passes through the first connecting groove 123, and then the first fixing bolt 113 passes through the two first fixing plates 112, and the first fixing nut 114 is threadedly connected to the first fixing bolt 113 and pressed against the first fixing plate 112, so that the first flange 1 and the inner tube 3 can be detachably connected, so that the first flange 1 can be reused, thereby improving economic benefits.

[0045] When connecting the pipeline 4 and the second fixing part 21, the two second fixing half rings 211 of the second fixing part 21 are moved along the radial direction of the inner tube 3 so that the second fixing block 41 passes through the second fixing groove 411 and the second connecting block 222 passes through the second connecting groove 223, and then the second fixing bolt 213 passes through the two second fixing plates 212, and the second fixing nut 214 is threadedly connected to the second fixing bolt 213 and pressed against the second fixing plate 212, so that the second flange 2 and the inner tube 3 can be detachably connected, so that the second flange 2 can be reused, thereby improving economic benefits.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe connection mechanism for an electric heating pipe, characterized in that: The invention comprises a first flange (1) and a second flange (2), wherein the first flange (1) comprises a first fixing portion (11) and a first connecting portion (12), and the second flange (2) comprises a second fixing portion (21) and a second connecting portion (22); The first fixing portion (11) comprises two first fixing half rings (111); a first fixing block (31) is arranged on the outer wall of the inner tube (3); the first fixing block (31) is symmetrically arranged along the radial direction of the inner tube (3); a first fixing groove (311) for the first fixing block (31) to pass through is opened on the side wall of the first fixing half ring (111); first fixing plates (112) are arranged at both ends of the first fixing half ring (111); two adjacent first fixing plates (112) are connected by a first fixing bolt (113); the first fixing bolt (113) passes through the two first fixing plates (112) and is threadedly connected to a first fixing nut (114); The second fixing portion (21) comprises two second fixing half rings (211); a second fixing block (41) is arranged on the outer wall of the pipeline (4); the second fixing block (41) is symmetrically arranged along the radial direction of the pipeline (4); a second fixing groove (411) for the second fixing block (41) to pass through is opened on the side wall of the second fixing half ring (211); second fixing plates (212) are arranged at both ends of the second fixing half ring (211); two adjacent second fixing plates (212) are connected by second fixing bolts (213); the second fixing bolts (213) pass through the two second fixing plates (212) and are threadedly connected to second fixing nuts (214); The first connecting portion (12) and the second connecting portion (22) are connected via a connecting assembly (5).

2. The pipe connection mechanism for electric heating pipe according to claim 1, characterized in that: The first connecting portion (12) comprises two first connecting half rings (121), wherein a first connecting block (122) is arranged on a surface of one of the first connecting half rings (121) close to the other first connecting half ring (121), and a first connecting groove (123) for the first connecting block (122) to penetrate is opened on the other first connecting half ring (121); The second connecting portion (22) comprises two second connecting half rings (221), wherein a second connecting block (222) is arranged on a surface of one of the second connecting half rings (221) close to the other second connecting half ring (221), and a second connecting groove (223) for the second connecting block (222) to penetrate is opened on the other second connecting half ring (221).

3. The pipe connection mechanism for the electric heating pipe according to claim 2, characterized in that: The first connecting block (122) and the second connecting block (222) are both covered with friction pads, and the friction pads are interference-fitted with the inner peripheral walls of the corresponding first connecting groove (123) and the second connecting groove (223).

4. The pipe connection mechanism for electric heating pipe according to claim 1, characterized in that: The connection assembly (5) is arranged in six groups equidistantly along the circumference of the first connection part (12), and the connection assembly (5) comprises a connection bolt (51) and a connection nut (52). The connection bolt (51) passes through the first connection part (12) and the second connection part (22) and is threadedly connected to the connection nut (52). The connection nut (52) is tightly pressed against a side of the second connection part (22) that is away from the first connection part (12).

5. The pipe connection mechanism for electric heating pipes according to claim 2, characterized in that: A first sealing ring (6) is provided on a surface of the first connecting portion (12) close to the second connecting portion (22), and a first sealing ring groove (7) for the first sealing ring (6) to penetrate is opened on a surface of the second connecting portion (22) close to the first connecting portion (12), and the first sealing ring (6) is interference-fitted with an inner wall of the first sealing ring groove (7).

6. The pipe connection mechanism for the electric heating pipe according to claim 5, characterized in that: A second sealing ring (8) is provided on a surface of the second connecting portion (22) close to the first connecting portion (12), and a second sealing ring groove (9) for the second sealing ring (8) to penetrate is opened on a surface of the first connecting portion (12) close to the second connecting portion (22), and the second sealing ring (8) is interference fit with the inner wall of the second sealing ring groove (9).

7. The pipe connection mechanism for the electric heating pipe according to claim 6, characterized in that: The first sealing ring (6) and the second sealing ring (8) are staggered and arranged close to each other.

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