Bell and spigot structure of heat distribution pipeline

Abstract

A bell and spigot structure of a heat distribution pipeline relates to the technical field of pipeline connection design and comprises a pipe spigot (1) and a pipe socket (2) inserted on the rear side of the pipe spigot (1), an annular sealing bin (21) and an annular deflection bin (22) are sequentially arranged on the inner circumference of the pipe socket (2) from front to back, a sealing ring (3) is arranged in the sealing bin (21), and the rear end of the pipe spigot (1) is located in the deflection bin (22). A front blocking wall (23) is arranged between the front side of the sealing bin (21) and the front end of the pipe socket (2), and the rear side wall of the front blocking wall (23) is of a horn-shaped structure with an opening pointing to the deflection bin (22). According to the utility model, through the arrangement of the stop part, the capability of the sealing ring to break away from the sealing bin is weakened, the sealing performance of the pipeline is improved by increasing the size of the sealing bin and reasonably changing the proportion of the size of each part in the sealing bin, and through the arrangement of the deflection bin, the deflection angle between the pipe socket and the pipe bell mouth is increased, so that the sealing performance of the pipeline is improved. Damage to the pipeline is reduced, and the safety performance of the pipeline is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection design technology, specifically a socket structure for thermal pipelines, which is particularly applicable to ductile iron thermal pipelines. Background Technology

[0002] Existing heating pipelines generally use steel pipes, which have poor corrosion resistance and short service life, restricting the safe and economical operation of heating projects. While ordinary ductile iron pipes for heating are corrosion resistant, the sealing and deflection properties of their joints cannot meet actual usage requirements. This manifests in two ways: firstly, the sealing rings of existing structures are prone to coming loose during use, limiting the increase of water supply pressure; secondly, the deflection angle of existing ductile iron pipes for heating is too small, and since the joints are the weakest points, they are easily damaged during disassembly and assembly, leading to joint deformation or leakage, thus affecting the overall safety performance. Utility Model Content

[0003] To address the technical problems existing in the background art, such as the sealing ring inside ordinary ductile iron pipes for heating easily coming loose during use, affecting the pipe's sealing performance, and the excessively small deflection angle at the interface causing deformation or leakage during disassembly and assembly, thus affecting the overall safety performance, this utility model provides a socket structure for heating pipes.

[0004] The technical solution of this utility model is as follows:

[0005] A spigot and socket structure for thermal pipelines is mainly used for connecting the beginning and end of thermal ductile iron pipes. Specifically, it includes a spigot and a socket inserted behind the spigot.

[0006] The inner circumference of the pipe socket is provided with an annular sealing chamber and an annular deflection chamber in sequence. The sealing chamber is equipped with a sealing ring, which seals the pipe socket and the pipe inlet to prevent fluid leakage.

[0007] The front side of the sealing chamber is connected to the front end of the pipe socket by a front barrier wall. The rear side wall of the front barrier wall is a funnel-shaped structure with an opening pointing towards the deflection chamber. The front side of the pipe socket is basically a vertical planar structure. On the axial section of the pipe socket, the corresponding front side wall of the front barrier wall is a vertical plane. The thickness between the front and rear side walls of the front barrier wall is the thickness of the front barrier wall itself, meaning that the thickness of the front barrier wall on the side closer to the pipe socket is less than the thickness on the side farther from the pipe socket. When the pipe socket is inserted into the pipe socket, its structure provides resistance to the reverse movement of the sealing ring along the insertion direction, thereby stabilizing the sealing ring to a certain extent and preventing the sealing ring from detaching from the sealing chamber.

[0008] The rear end of the pipe spigot is located in the deflection chamber. The deflection chamber provides a deflection space for the pipe spigot and the pipe socket when they are inserted, so that the pipe spigot and the pipe socket can be deflected at a certain angle. The deflection angle can be increased by changing the size of the deflection chamber, which avoids damage to the pipe spigot and the pipe socket due to the deflection angle being too small, and improves the safety of the pipeline.

[0009] As described above, in the structure of a heat pipe socket, the diameter of the deflection chamber in the middle is set to be larger than the diameter of its two ends, so as to provide more space for deflection when the pipe socket and pipe spigot are disassembled and assembled. By increasing its deflection angle, the pipe can be well protected.

[0010] To prevent excessive deflection angle from affecting the pipe's seal, the axial distance between the maximum diameter position of the deflection chamber and its front side is set to no more than 2 / 5 of the deflection chamber's length. This controls the deflection angle between the pipe socket and the pipe spigot within a suitable range, which is beneficial for normal use.

[0011] To increase the strength of the sealing chamber, the area between the sealing chamber and the deflection chamber is set as a rear barrier wall to cope with the force exerted by the sealing ring on the rear side wall of the sealing chamber during the insertion and mating of the pipe socket and the pipe inlet. For ease of processing and disassembly, the inner diameter of the rear barrier wall and the front barrier wall are set to be the same.

[0012] To improve the sealing performance of the pipeline, the sealing chamber includes a stop part and a first sealing part arranged at the front and rear. The maximum diameter of the stop part is set to be no less than 1.5 times the maximum diameter of the first sealing part. This setting increases the size of the stop part relative to the size of the first sealing part, making it more difficult for the sealing ring to break free from the sealing chamber.

[0013] To further improve the sealing performance of the pipeline, a stop wall is provided on the rear side of the stop part, and the inner ring cross-section of the stop wall is an inwardly convex semi-circular arc. This setting not only increases the ability of the sealing chamber to restrict the movement of the sealing ring, but also enhances the strength of the contact position between the stop part of the sealing chamber and the first sealing part.

[0014] Based on the above settings, in order to further improve the sealing performance of the pipeline, the overall size of the sealing chamber has been increased, and the proportions of each part have been rationally designed. Specifically, the length of the sealing chamber is set to be no less than 1 / 2 of the length of the pipe socket, the length of the sealing ring is set to be no less than 3 / 10 of the length of the sealing chamber, and the length of the stop part is set to be no less than 1 / 5 of the length of the sealing chamber. This design not only improves the sealing effect of the pipeline, but also effectively prevents the sealing ring from detaching from the sealing chamber.

[0015] The beneficial effects of this utility model are as follows: by setting the stop part inside the sealing chamber, the ability of the sealing ring to break free from the sealing chamber is greatly weakened; by increasing the size of the sealing chamber and reasonably changing the proportion of the size of each part inside the sealing chamber, the sealing performance of the pipeline is improved; and by setting the deflection chamber, the deflection angle between the pipe spigot and the pipe socket is increased, reducing damage to the pipe spigot and the pipe socket and improving the safety performance of the pipeline. Attached Figure Description

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the structure of a heat pipe socket of the present invention (with sealing ring installed);

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0019] The components represented by the various reference numerals in the diagram are:

[0020] 1. Pipe socket; 2. Pipe inlet; 21. Sealing chamber; 211. Stop part; 212. First sealing part; 213. Stop wall; 22. Deflection chamber; 23. Front barrier wall; 24. Rear barrier wall; 3. Sealing ring. Detailed Implementation

[0021] Please see Figure 1 This embodiment provides a heat pipe socket structure, mainly used for connecting the beginning and end of a heat pipe ductile iron pipe. Specifically, it includes a pipe socket 1 and a pipe socket 2 inserted on the rear side of the pipe socket 1.

[0022] The inner circumference of the pipe socket 2 is provided with an annular sealing chamber 21 and an annular deflection chamber 22 in sequence. The sealing chamber 21 is filled with a sealing ring 3. The structure of the sealing ring 3 can be designed according to the structure of the sealing chamber 21. The sealing ring 3 is used to seal the pipe socket 2 and the pipe spigot 1, and plays a role in preventing fluid leakage.

[0023] The front side of the sealing chamber 21 is connected to the front end of the pipe socket 2 by a front blocking wall 23. The rear side wall of the front blocking wall 23 is a funnel-shaped structure with an opening pointing towards the deflection chamber 22. The front side of the pipe socket 2 is a vertical planar structure. On the axial section of the pipe socket 2, the corresponding front side wall of the front blocking wall 23 is a vertical plane. The thickness between the front and rear side walls of the front blocking wall 23 is the thickness of the front blocking wall 23. That is, the thickness of the front blocking wall 23 on the side closer to the pipe insertion port 1 is less than the thickness on the side farther away from the pipe insertion port 1. When the pipe insertion port 1 is inserted into the pipe socket 2, its structure provides resistance to the reverse movement of the sealing ring 3 along the insertion direction, thereby stabilizing the sealing ring 3 to a certain extent and preventing the sealing ring 3 from breaking out of the sealing chamber 21.

[0024] The rear end of the pipe socket 1 is located in the deflection chamber 22. The deflection chamber 22 is used to provide a deflection space for the pipe socket 1 and the pipe socket 2 when they are inserted, so that the pipe socket 1 and the pipe socket 2 can be deflected at a certain angle. The deflection angle can be increased by changing the size of the deflection chamber 22, which avoids damage to the pipe socket 1 and the pipe socket 2 due to the deflection angle being too small, and improves the safety of the pipeline.

[0025] Based on the above settings, the diameter of the middle part of the deflection chamber 22 is set to be larger than the diameter of its two ends, so as to provide more space for deflection when the pipe spigot 1 and pipe socket 2 are disassembled and assembled. The deflection angle can be increased by changing the diameter of the middle part of the deflection chamber 22, which can effectively protect the pipeline.

[0026] In this embodiment, to prevent excessive deflection angle from affecting the sealing of the pipeline, the axial distance between the maximum diameter position of the deflection chamber 22 and its front side is set to be no more than 2 / 5 of the length of the deflection chamber 22, so as to control the deflection angle between the pipe socket 2 and the pipe spigot 1 within a suitable range, which is beneficial to normal use.

[0027] In this embodiment, to increase the strength of the sealing chamber 21, the area between the sealing chamber 21 and the deflection chamber 22 is set as a rear blocking wall 24 to cope with the force applied to the rear side wall of the sealing chamber 21 by the sealing ring 3 during the insertion and mating process. For ease of processing and disassembly, the inner diameter of the rear blocking wall 24 and the front blocking wall 23 are set to be the same.

[0028] Combination Figure 2 In order to improve the sealing performance of the pipeline, the sealing chamber 21 includes a stop part 211 and a first sealing part 212 arranged at the front and rear. The maximum diameter of the stop part 211 is set to be no less than 1.5 times the maximum diameter of the first sealing part 212. This setting increases the size of the stop part 211 relative to the size of the first sealing part 212, making it more difficult for the sealing ring 3 to break free from the sealing chamber 21.

[0029] To further improve the sealing performance of the pipeline, a stop wall 213 is provided on the rear side of the stop part 211, and the inner ring cross section of the stop wall 213 is an inwardly convex semi-circular arc. This setting not only increases the ability of the sealing chamber 21 to restrict the movement of the sealing ring 3, but also enhances the strength of the contact position between the stop part 211 of the sealing chamber 21 and the first sealing part 212.

[0030] To further improve the sealing performance of the pipeline, based on the aforementioned sealing chamber 21, the overall size of the sealing chamber 21 has been increased, and the proportions of each part have been rationally designed. Specifically, the length of the sealing chamber 21 is set to be no less than 1 / 2 of the length of the pipe socket 2, the length of the sealing ring 3 is set to be no less than 3 / 10 of the length of the sealing chamber 21, and the length of the stop part 211 is set to be no less than 1 / 5 of the length of the sealing chamber 21. This design not only improves the sealing effect of the pipeline and effectively prevents the sealing ring 3 from detaching from the sealing chamber 21, but also improves the safety performance of the pipeline.

Claims

1. A socket structure for a thermal pipeline, characterized in that, It includes a pipe socket (1) and a pipe socket (2) inserted on its rear side; The inner circumference of the pipe socket (2) is provided with an annular sealing chamber (21) and an annular deflection chamber (22) in sequence. The sealing chamber (21) is filled with a sealing ring (3), and the rear end of the pipe insertion port (1) is located in the deflection chamber (22). The front side of the sealing chamber (21) and the front end of the pipe socket (2) are connected by a front barrier wall (23), and the rear side wall of the front barrier wall (23) is a trumpet-shaped structure with an opening pointing towards the deflection chamber (22). The sealing chamber (21) includes a stop part (211) and a first sealing part (212) arranged at the front and rear, and the length of the stop part (211) is not less than 1 / 5 of the length of the sealing chamber (21); The length of the sealing chamber (21) is not less than 1 / 2 of the length of the pipe socket (2); The length of the sealing ring (3) is not less than 3 / 10 of the length of the sealing chamber (21); The diameter of the middle part of the deflection chamber (22) is larger than the diameter of its two ends and the transition from the middle part to the two ends is arc-shaped. The axial distance between the maximum diameter of the deflection chamber (22) and its front side is not greater than 2 / 5 of the length of the deflection chamber (22).

2. The socket structure for a thermal pipeline according to claim 1, characterized in that, The sealing chamber (21) and the deflection chamber (22) are separated by a rear barrier wall (24), which has the same inner diameter as the front barrier wall (23).

3. The socket structure for a thermal pipeline according to claim 1, characterized in that, A stop wall (213) is provided on the rear side of the stop part (211).

4. The socket structure for a thermal pipeline according to claim 3, characterized in that, The inner cross-section of the stop wall (213) is a semi-circular arc that bulges inward.

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