High-strength sealing joint structure of direct-buried heat supply pipeline

Abstract

The utility model relates to a heat supply pipeline installation technical field especially relates to a kind of high-strength sealing joint structure of direct-burial heat supply pipeline, including outer sleeve and inner sleeve, the middle position of outer sleeve inner wall is fixedly installed with mounting ring, annular mounting groove is formed between outer sleeve and inner sleeve symmetry, the both ends of inner sleeve are symmetrically slidably sleeved with center connecting pipe, the one end circumference equidistance of center connecting pipe is fixedly installed with multiple extension springs, the both ends of two center connecting pipes, away from extension spring, are fixedly installed with connecting flange.The utility model when pipeline displacement occurs due to thermal expansion and cold shrink, pipeline will pull center connecting pipe and move between outer sleeve and inner sleeve, automatically compensate the gap generated by pipeline displacement, effectively relieve the pulling and extrusion of joint connecting part by pipeline movement, avoid the loosening between joint and pipeline, significantly enhance the adaptability of joint to pipeline thermal expansion and cold shrink displacement.

Description

Technical Field

[0001] This utility model relates to the field of heating pipeline installation technology, and in particular to a high-strength sealing joint structure for directly buried heating pipelines. Background Technology

[0002] With its significant advantages such as small footprint, convenient construction, and low heat loss, direct-buried heating pipelines have become a core component of urban centralized heating systems. In the frigid northern regions, the length of a single direct-buried heating pipeline can reach several kilometers, effectively reducing the impact of ground excavation on urban traffic and residents' lives. During the laying of heating pipelines, the connection between two pipelines usually requires the use of pipe joints.

[0003] Existing direct-buried heating pipe joints use rigid connection methods, which lack adaptability to pipe displacement. When the pipe moves due to thermal expansion and contraction, the connection between the joint and the pipe is very easy to loosen. Once loosened, the originally tight sealing structure will be damaged, the sealing performance of the seal will decrease, and thus lead to leakage of the heating medium. Summary of the Invention

[0004] The purpose of this utility model is to solve the following shortcomings in the existing technology: when the pipeline moves due to thermal expansion and contraction, the connection between the joint and the pipeline is very easy to loosen. Once loosened, the originally tightly fitted sealing structure will be damaged, the sealing performance of the sealing element will decrease, and the heating medium will be leaked. Therefore, a high-strength sealing joint structure for direct-buried heating pipelines is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-strength sealing joint structure for a direct-buried heating pipeline includes an outer sleeve and an inner sleeve. An installation ring is fixedly installed at the middle position of the inner wall of the outer sleeve, and the inner wall of the installation ring is fixedly connected to the outer surface of the inner sleeve.

[0007] The outer sleeve and the inner sleeve form symmetrical annular mounting grooves. The two ends of the inner sleeve are symmetrically slidably fitted with central connecting pipes. One end of each of the two central connecting pipes is slidably inserted into the two annular mounting grooves. Multiple telescopic springs are fixedly installed circumferentially at one end of each central connecting pipe. One end of each telescopic spring is fixedly connected to the side wall of the mounting ring. A connecting flange is fixedly installed at the end of each of the two central connecting pipes away from the telescopic springs.

[0008] Preferably, the inner wall of the outer sleeve is symmetrically provided with a plurality of annular first protrusions, the plurality of first protrusions being distributed at intervals along the axial direction of the outer sleeve, and a first elastic sealing ring being provided between each two adjacent first protrusions. The outer side of the first elastic sealing ring is tightly fitted with the inner wall of the outer sleeve, and the inner side of the first elastic sealing ring is tightly fitted with the outer wall of the central connecting pipe.

[0009] Preferably, the outer wall of the inner sleeve is provided with a plurality of annular second protrusions, the plurality of second protrusions being distributed at intervals along the axial direction of the inner sleeve, and a second elastic sealing ring being provided between each two adjacent second protrusions. The outer side of the second elastic sealing ring is tightly fitted with the inner wall of the central connecting pipe, and the inner side of the second elastic sealing ring is tightly fitted with the outer wall of the inner sleeve.

[0010] Preferably, a tapered guide ring plate is fixedly installed on the inner wall of the central connecting pipe, and one end of the guide ring plate extends obliquely into one end of the inner sleeve.

[0011] Preferably, an annular groove is formed between the guide ring plate and the central connecting pipe, and multiple support blocks are fixedly installed equidistantly within the annular groove, the support blocks being fixedly connected to the guide ring plate and the central connecting pipe.

[0012] Preferably, the outer wall of the outer sleeve is provided with spirally distributed reinforcing ribs, which are integrally formed with the outer sleeve.

[0013] The beneficial effects of this utility model are as follows:

[0014] When the pipeline shifts due to thermal expansion and contraction, the pipeline will pull the central connecting pipe to move between the outer and inner sleeves. The telescopic spring will undergo elastic deformation, automatically compensating for the gap caused by the pipeline displacement. This effectively alleviates the pulling and squeezing of the joint connection area caused by the pipeline movement, avoids loosening between the joint and the pipeline, and significantly enhances the adaptability of the joint to the thermal expansion and contraction displacement of the pipeline. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a high-strength sealing joint structure for a direct-buried heating pipeline proposed in this utility model;

[0016] Figure 2 This is a three-dimensional partial cross-sectional structural diagram of a high-strength sealing joint structure for a directly buried heating pipeline proposed in this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional schematic diagram of a high-strength sealing joint structure for a direct-buried heating pipeline proposed in this utility model;

[0018] Figure 4 A cross-sectional view of the central connecting pipe, connecting flange, and guide ring plate;

[0019] Figure 5 for Figure 3 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1 Outer sleeve, 2 Inner sleeve, 3 Mounting ring, 4 Center connecting pipe, 5 Telescopic spring, 6 Connecting flange, 7 First protrusion, 8 First elastic sealing ring, 9 Second protrusion, 10 Second elastic sealing ring, 11 Guide ring plate, 12 Support block, 13 Reinforcing rib. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 A high-strength sealing joint structure for direct-buried heating pipelines includes an outer sleeve 1 and an inner sleeve 2. An installation ring 3 is fixedly installed at the middle position of the inner wall of the outer sleeve 1. The inner wall of the installation ring 3 is fixedly connected to the outer surface of the inner sleeve 2. The inner sleeve 2 is fixedly connected to the outer sleeve 1 through the installation ring 3.

[0023] A symmetrical annular mounting groove is formed between the outer sleeve 1 and the inner sleeve 2. The two ends of the inner sleeve 2 are symmetrically slidably fitted with central connecting pipes 4. One end of the two central connecting pipes 4 is slidably inserted into the two annular mounting grooves. Multiple telescopic springs 5 ​​are fixedly installed circumferentially at one end of the central connecting pipe 4. One end of each telescopic spring 5 is fixedly connected to the side wall of the mounting ring 3. A connecting flange 6 is fixedly installed at the end of each of the two central connecting pipes 4 away from the telescopic springs 5.

[0024] When two adjacent pipes are connected, one end of each pipe is connected to the connecting flange 6 at one end of the two central connecting pipes 4. The central connecting pipe 4 moves horizontally along the axial direction of the outer sleeve 1 via the telescopic spring 5. When the pipe is displaced due to thermal expansion and contraction, the pipe will pull the central connecting pipe 4 to move between the outer sleeve 1 and the inner sleeve 2. The telescopic spring 5 undergoes elastic deformation, automatically compensating for the gap caused by the pipe displacement, effectively alleviating the pulling and squeezing of the joint connection part caused by the pipe movement, avoiding loosening between the joint and the pipe, and significantly enhancing the adaptability of the joint to the displacement of the pipe due to thermal expansion and contraction.

[0025] The inner wall of the outer sleeve 1 is symmetrically provided with multiple annular first protrusions 7, which are distributed at intervals along the axial direction of the outer sleeve 1. A first elastic sealing ring 8 is provided between each two adjacent first protrusions 7. The outer side of the first elastic sealing ring 8 is tightly fitted with the inner wall of the outer sleeve 1, and the inner side of the first elastic sealing ring 8 is tightly fitted with the outer wall of the central connecting pipe 4. Multiple first elastic sealing rings 8 are provided between the outer sleeve 1 and the central connecting pipe 4. Even if the thermal expansion and contraction of the pipe causes a small displacement between the central connecting pipe 4 and the outer sleeve 1, the first elastic sealing ring 8 can still tightly fit the surfaces of the outer sleeve 1 and the central connecting pipe 4 through its own elastic deformation, maintaining a good sealing state.

[0026] The outer wall of the inner sleeve 2 is provided with multiple annular second protrusions 9, which are distributed at intervals along the axial direction of the inner sleeve 2. A second elastic sealing ring 10 is provided between each two adjacent second protrusions 9. The outer side of the second elastic sealing ring 10 is tightly fitted with the inner wall of the central connecting pipe 4, and the inner side of the second elastic sealing ring 10 is tightly fitted with the outer wall of the inner sleeve 2. Multiple second elastic sealing rings 10 are provided between the inner sleeve 2 and the central connecting pipe 4. Even if the thermal expansion and contraction of the pipeline causes a small displacement between the central connecting pipe 4 and the inner sleeve 2, the second elastic sealing ring 10 can still tightly fit the surfaces of the inner sleeve 2 and the central connecting pipe 4 through its own elastic deformation, maintaining a good sealing state.

[0027] A tapered guide ring plate 11 is fixedly installed on the inner wall of the central connecting pipe 4. One end of the guide ring plate 11 extends obliquely into one end of the inner sleeve 2. An annular groove is formed between the guide ring plate 11 and the central connecting pipe 4. Multiple support blocks 12 are fixedly installed equidistantly in the annular groove. The support blocks 12 are fixedly connected to the guide ring plate 11 and the central connecting pipe 4. When liquid flows from the central connecting pipe 4 into the inner sleeve 2, the guide ring plate 11 guides the liquid to flow into the inner sleeve 2, preventing the liquid from hitting one end of the inner sleeve 2 and reducing the liquid flow into the gap between the inner sleeve 2 and the central connecting pipe 4. The support blocks 12 support the guide ring plate 11, strengthen the installation of the guide ring plate 11, and enable the guide ring plate 11 to withstand heavier liquid impacts.

[0028] The outer wall of the outer sleeve 1 is provided with spirally distributed reinforcing ribs 13, which are integrally formed with the outer sleeve 1, effectively enhancing the joint's compressive strength and deformation resistance.

[0029] In this invention, when two adjacent pipes are connected, one end of each pipe is connected to a connecting flange 6 at one end of one of the two central connecting pipes 4. The central connecting pipe 4 moves horizontally along the axial direction of the outer sleeve 1 via a telescopic spring 5. When the pipe is displaced due to thermal expansion and contraction, the pipe will pull the central connecting pipe 4 to move between the outer sleeve 1 and the inner sleeve 2. The telescopic spring 5 undergoes elastic deformation, automatically compensating for the gap caused by the pipe displacement, effectively alleviating the pulling and squeezing of the joint connection part caused by the pipe movement, avoiding loosening between the joint and the pipe, and significantly enhancing the adaptability of the joint to the displacement caused by the thermal expansion and contraction of the pipe.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-strength sealing joint structure for a directly buried heating pipeline, comprising an outer sleeve (1) and an inner sleeve (2), characterized in that, An installation ring (3) is fixedly installed at the middle position of the inner wall of the outer sleeve (1), and the inner wall of the installation ring (3) is fixedly connected to the outer surface of the inner sleeve (2). The outer sleeve (1) and the inner sleeve (2) form a symmetrical annular mounting groove. The two ends of the inner sleeve (2) are symmetrically slidably fitted with central connecting pipes (4). One end of the two central connecting pipes (4) is slidably inserted into the two annular mounting grooves. Multiple telescopic springs (5) are fixedly installed at equal intervals around one end of the central connecting pipe (4). One end of each of the multiple telescopic springs (5) is fixedly connected to the side wall of the mounting ring (3). A connecting flange (6) is fixedly installed at the end of each of the two central connecting pipes (4) away from the telescopic springs (5).

2. The high-strength sealing joint structure for a direct-buried heating pipeline according to claim 1, characterized in that, The inner wall of the outer sleeve (1) is symmetrically provided with a plurality of annular first protrusions (7). The plurality of first protrusions (7) are distributed at intervals along the axial direction of the outer sleeve (1). A first elastic sealing ring (8) is provided between each two adjacent first protrusions (7). The outer side of the first elastic sealing ring (8) is tightly fitted with the inner wall of the outer sleeve (1), and the inner side of the first elastic sealing ring (8) is tightly fitted with the outer wall of the central connecting pipe (4).

3. The high-strength sealing joint structure for a directly buried heating pipeline according to claim 1, characterized in that, The outer wall of the inner sleeve (2) is provided with a plurality of annular second protrusions (9). The plurality of second protrusions (9) are distributed at intervals along the axial direction of the inner sleeve (2). A second elastic sealing ring (10) is provided between each two adjacent second protrusions (9). The outer side of the second elastic sealing ring (10) is tightly fitted with the inner wall of the central connecting pipe (4), and the inner side of the second elastic sealing ring (10) is tightly fitted with the outer wall of the inner sleeve (2).

4. The high-strength sealing joint structure for a directly buried heating pipeline according to claim 3, characterized in that, The inner wall of the central connecting pipe (4) is fixedly installed with a tapered guide ring plate (11), one end of which extends obliquely into one end of the inner sleeve (2).

5. The high-strength sealing joint structure for a directly buried heating pipeline according to claim 4, characterized in that, An annular groove is formed between the guide ring plate (11) and the central connecting pipe (4). Multiple support blocks (12) are fixedly installed at equal intervals around the annular groove. The support blocks (12) are fixedly connected to the guide ring plate (11) and the central connecting pipe (4).

6. The high-strength sealing joint structure for a directly buried heating pipeline according to claim 1, characterized in that, The outer wall of the outer sleeve (1) is provided with spirally distributed reinforcing ribs (13), and the reinforcing ribs (13) are integrally formed with the outer sleeve (1).

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