Self-hydrophobic hinge type expansion joint

Abstract

The utility model relates to a self-draining hinge type expansion joint which comprises a corrugated pipe, and end pipes are connected to the two sides of the corrugated pipe respectively. The expansion joint further comprises a flow guide part, a water accumulation area is formed among the flow guide part, the corrugated pipe and part of the end pipe, the expansion joint further comprises a communicating pipe, one end of the communicating pipe is communicated with the water accumulation area, and the other end of the communicating pipe is communicated with the end pipe. According to the self-draining hinge type expansion joint, an effective self-draining mechanism is achieved by designing the water accumulation area and the communicating pipe, and when condensate water exists in a pipeline, the condensate water at the high position can be collected into the water accumulation area, drained into the end pipe through the communicating pipe and then drained out through the water drainage opening in the end pipe. By means of the design, durability and reliability of the expansion joint are improved, the problems of erosion and water hammer caused by water accumulation between traditional pipe sections are solved, and the problem that whistle blowing sound is generated when holes are formed in the guide cylinder is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of expansion joint, especially hinge type expansion joint of self drainage. BACKGROUND

[0002] When the steam pipeline is running, the heat is often transferred to the surrounding environment due to the medium flow in the pipeline, and then part of the steam will produce condensed water. Especially in the thermal displacement compensation of the steam pipeline, when a plurality of single hinge expansion joints arranged horizontally are adopted, because the expansion joint needs to absorb a large angular displacement, a single flow guide cylinder often cannot meet the gap requirement of the angular displacement. Therefore, the application of the cross flow guide cylinder becomes an effective solution to adapt to the gap required by the single hinge expansion joint when absorbing the angular displacement.

[0003] However, this design also brings some influences, such as reducing the effective cross-sectional area of the pipeline, and may indirectly separate the pipeline into two separate pipe sections. The condensed water will accumulate between the pipe sections, and if the condensed water is not removed, it will cause problems such as erosion and water hammer.

[0004] The conventional solution is to open a plurality of drainage holes in the flow guide cylinder, and the condensed liquid will flow away from the drainage holes when it accumulates to a certain amount, but this method will cause the airflow to produce a whistling sound when passing through the opening of the flow guide cylinder. SUMMARY

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a hinge type expansion joint with self-drainage to solve one or more problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A hinge type expansion joint with self-drainage, the expansion joint comprises a corrugated pipe, and end pipes are connected to both sides of the corrugated pipe; the expansion joint further comprises a flow guide part, and the flow guide part forms a water accumulation area with the corrugated pipe and part of the end pipes; the expansion joint further comprises a communication pipe, one end of the communication pipe is communicated with the water accumulation area, and the other end is communicated with the end pipe.

[0008] Further, the flow guide part of the expansion joint comprises a first flow guide cylinder and a second flow guide cylinder, and the first flow guide cylinder and the second flow guide cylinder are connected to the end pipe at one end and cooperate with each other.

[0009] Further, the length of the flow guide part in the first direction is greater than the length of the corrugated pipe in the first direction.

[0010] Further, the communication pipe port is flush with the inner wall of the end pipe.

[0011] Further, the communication pipe is arranged at the lowest position of the end pipe.

[0012] Further, the expansion joint is further provided with vertical plates at the end pipes on both sides of the corrugated pipe, and the vertical plates are connected by a hinge plate group.

[0013] Further, the hinge plate group comprises a first hinge plate and a second hinge plate, and one end of each of the first hinge plate and the second hinge plate is connected to the vertical plate.

[0014] Further, one end of each of the first hinge plate and the second hinge plate is further connected by a pin shaft.

[0015] Compared with the prior art, the self-draining hinge type expansion joint has the following beneficial technical effects:

[0016] The self-draining hinge type expansion joint of the utility model realizes an effective self-draining mechanism by designing the water accumulation area and the communication pipe, when there is condensed water in the pipeline, the condensed water at the position with higher water potential will be collected to the water accumulation area and discharged to the end pipe through the communication pipe and then discharged through the drain port in the end pipe. The design not only improves the durability and reliability of the expansion joint, solves the problems of erosion and water hammer caused by water accumulation between traditional pipe sections, but also avoids the problem of whistle sound caused by the opening of the flow guide cylinder; at the same time, the hinge type design makes the expansion joint can adapt to larger displacement and deformation, thereby improving the flexibility and stability of the entire pipeline system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure front view of a self-draining hinge type expansion joint according to an embodiment of the utility model is shown.

[0018] Figure 2 A structure side view of a self-draining hinge type expansion joint according to an embodiment of the utility model is shown.

[0019] Markings in the drawings: 1, corrugated pipe; 2, end pipe; 3, flow guide part; 301, first flow guide cylinder; 302, second flow guide cylinder; 4, water accumulation area; 5, communication pipe; 6, vertical plate; 7, hinge plate group; 701, first hinge plate; 702, second hinge plate; 8, pin shaft. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer, the self-draining hinge type expansion joint provided by the utility model is further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the utility model will be clearer according to the following description. It should be noted that the drawings are very simplified and all use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions for implementing the utility model, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the functions and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0021] Please refer to Figure 1 and Figure 2 The self-draining hinge type expansion joint of the embodiment comprises a corrugated pipe 1, end pipes 2 connected to both sides of the corrugated pipe 1 for connecting the expansion joint with other parts in the pipeline system. The expansion joint further comprises a flow guide part 3, which forms a water accumulation area 4 with the corrugated pipe 1 and part of the end pipes 2. The flow guide part 3 guides the flow of fluid in the expansion joint, and the water accumulation area 4 collects and stores the water that may accumulate in the expansion joint. The expansion joint further comprises a communication pipe 5, one end of which is communicated with the water accumulation area 4, and the other end of which is communicated with the end pipe 2.

[0022] Further, the flow guide part 3 of the expansion joint comprises a first flow guide cylinder 301 and a second flow guide cylinder 302, which are connected to the end pipes 2 at one end and cooperate with each other. The length of the flow guide part 3 in the first direction is greater than the length of the corrugated pipe 1 in the first direction, which helps to ensure that the water accumulation area 4 has enough space to collect water. In this embodiment, the first direction is the main flow direction of the corrugated pipe 1, i.e. the length direction of the corrugated pipe 1. Figure 1

[0023] Further, the opening of the communication pipe 5 is flush with the inner wall of the end pipe 2, which helps to reduce the resistance of fluid flow and ensure the smoothness of drainage. The communication pipe 5 is arranged at the lowest part of the end pipe 2, i.e. near the ground as shown, to ensure that the accumulated water can be completely drained and avoid residual water. Figure 2

[0024] ​​Further, the expansion joint is provided with vertical plates 6 at the end pipes 2 on both sides of the bellows 1, and the vertical plates 6 are connected by hinge plate sets 7, in the embodiment, two vertical plates 6 are provided at the end pipes 2 on both sides, for supporting and fixing the hinge plate sets 7.

[0025] Further, the hinge plate sets 7 include first hinge plates 701 and second hinge plates 702, one end of the first hinge plates 701 and the second hinge plates 702 is connected to the vertical plates 6, and one end of the first hinge plates 701 and the second hinge plates 702 is further connected by a pin shaft 8. Preferably, in the embodiment, one hinge plate set 7 is provided at both ends of the vertical plate 6, each hinge plate set 7 includes one first hinge plate 701 and two second hinge plates 702, and the first hinge plate 701 is arranged between the second hinge plates 702. The design of the hinge plate set 7 allows the bellows 1 and the end pipe 2 to move relative to each other, thereby improving the flexibility and adaptability of the expansion joint, and the design of the pin shaft 8 further enhances the stability and reliability of the hinge plate set 7.

[0026] The technical features of the above-mentioned embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0027] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A self-hydrophobic hinge-type expansion joint, characterized by: The expansion joint includes a bellows, with end pipes connected to both sides of the bellows respectively; the expansion joint also includes a guide portion, a water accumulation area is formed between the guide portion, the bellows and part of the end pipes, and the expansion joint also includes a connecting pipe, one end of the connecting pipe is connected to the water accumulation area, and the other end is connected to the end pipe.

2. A self-hydrophobic hinge-type expansion joint according to claim 1, characterized in that: The guide portion of the expansion joint includes a first guide tube and a second guide tube. The first guide tube and the second guide tube cooperate with each other and are both connected to the end pipe at one end.

3. A self-hydrophobic hinge-type expansion joint according to claim 2, characterized in that: The length of the guide portion along the first direction is greater than the length of the bellows along the first direction.

4. A self-hydrophobic hinge-type expansion joint according to claim 3, characterized in that: The opening of the connecting pipe is flush with the inner wall of the end pipe.

5. A self-hydrophobic hinge-type expansion joint according to claim 4, characterized in that: The connecting pipe is arranged at the lowest point of the end pipe.

6. A self-hydrophobic hinge-type expansion joint according to claim 5, characterized in that: The expansion joint is further provided with vertical plates at the end pipes on both sides of the bellows, and the vertical plates are connected by a hinge plate group.

7. A self-hydrophobic hinge-type expansion joint according to claim 6, characterized in that: The hinge plate assembly includes a first hinge plate and a second hinge plate, and one end of each of the first hinge plate and the second hinge plate is connected to the vertical plate.

8. The self-hydrophobic hinge-type expansion joint according to claim 7, characterized in that: One end of the first hinge plate and the second hinge plate are further connected via a pin shaft.

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