CN206784431U - Telescopic joint for underground pipe gallery - Google Patents

Abstract

The utility model discloses a telescopic joint for an underground comprehensive pipe gallery, which comprises a unit pipe joint formed by assembling the first unit plates respectively located on the upper, lower and two sides along the circumferential direction, and the unit pipe joint is assembled along the axial direction. Comprehensive pipe gallery: expansion joints are arranged in the pipe gallery to adapt to the axial deformation caused by the thermal expansion and contraction of the gallery body or the radial deformation caused by the foundation settlement. The advantages are: firstly, the expansion joint can prevent the deformation of the corridor body due to thermal expansion and contraction; secondly, the expansion joint can adopt a circular arc transition rather than an obtuse angle transition, which can relieve the concentrated stress on the pipe body and improve the fatigue life of the pipe gallery; and then , the unit plate of the expansion joint can be welded instead of being fixed by a steel flange. Using the scalability of the corrugation, it can not only expand and contract along the axial direction, but also deal with radial settlement and displacement, and has strong adaptability; moreover , the expansion joint is connected to the pipe gallery through a steel flange to ensure the overall strength and sealing, and at the same time, it can be a prefabricated part, which is convenient for installation and disassembly.

Description

Expansion joints for underground comprehensive pipe gallery

technical field

The utility model relates to a pipe gallery, in particular to an expansion joint used for an underground comprehensive pipe gallery.

Background technique

The applicant previously applied for an invention patent named "Box-shaped Pipeline with Circumferential Obtuse Angle Connection" with the application number 201610649976.0, which consists of unit plates located on the upper, lower and two sides respectively assembled in the circumferential direction to form a unit Pipe joints, the unit pipe joints are assembled in the axial direction to form a box-shaped pipe; wherein, the unit plates are arc-shaped corrugated plates with arches on the outside of the box-shaped pipe, and obtuse angles for circumferential connection are formed between adjacent unit plates. In actual engineering, in view of the temperature difference, the comprehensive pipe gallery has thermal expansion and contraction effects, especially when the corridor body is long, the thermal expansion and cold contraction effect is more obvious in the direction of the corridor body axis. If the heat expansion and contraction along the axis are well released or absorbed, the entire gallery body will easily cause cracking and deformation under such stress, seriously affecting the safety and use of the entire project. The above-mentioned comprehensive pipe gallery with obtuse angle connection structure, in view of the fact that its four corners in the circumferential direction are connected by longitudinally arranged steel flanges, severely restricts its own thermal expansion and contraction along the axial direction.

Therefore, urgently need to solve above-mentioned technical problem.

Utility model content

Purpose of the utility model: The purpose of the utility model is to provide an expansion joint arranged between the comprehensive pipe corridors to deal with the telescopic settlement and displacement of the corridor body.

Technical solution: The telescopic joint used for the underground comprehensive pipe gallery of the utility model includes the first unit plates located on the upper, lower and both sides respectively assembled in the circumferential direction to form a unit pipe joint, and the unit pipe joints are assembled in the axial direction to form a comprehensive pipe joint. Pipe gallery; expansion joints are arranged between the pipe galleries to adapt to axial deformation caused by thermal expansion and contraction of the gallery body or radial deformation caused by foundation settlement.

Further, the expansion joint is formed by assembling the second unit plates respectively located on the upper, lower and both sides in the circumferential direction, wherein the adjacent second unit plates are connected by arc transitions rather than obtuse angles, so that When the expansion joint is applied, the stress concentration received is relieved, the expansion and contraction amount is large, and the fatigue life is improved.

Further, the axial ends of the expansion joints are connected to the corridor body of the pipe gallery, and are arranged at intervals between the corridor bodies.

Further, the adjacent second unit plates in the expansion joint are connected by arc-shaped corrugated angle plates, and the arc-shaped corrugated angle plates are welded smoothly with the splicing ends of the corresponding second unit plates.

Further, the first unit plate is an arc-shaped corrugated plate that arches toward the outside of the pipe gallery body, and adjacent first unit plates form obtuse angles connected in the circumferential direction.

Further, the second unit plate in the expansion joint is an arc-shaped corrugated plate that is consistent with the curvature of the first unit plate in the pipe gallery. Using the scalability of the corrugation, it can not only expand and contract along the axial direction, but also expand and contract in the side and vertical directions. Uneven settlement and misalignment can also be dealt with.

Further, the second unit plate and the arc-shaped corrugated corner plate form an arc-shaped cylindrical corrugated pipe body, and the corrugated pipe body part is in the form of double-layer steel plates to improve the expansion and contraction capacity and service life of the expansion joint.

Further, the end of the gallery body is provided with a first steel flange, which is a first frame-shaped flange formed by circumferential splicing of arc-shaped flanges arranged along the port of the gallery body. Axial assembly is realized through the first frame-type flange.

Further, the axial end of the expansion joint is provided with a second steel flange, which is a second frame-shaped flange formed by splicing arc-shaped flanges arranged along the port of the expansion joint in the circumferential direction. The arc of the second frame-shaped flange is consistent with the arc of the first frame-shaped flange, and the second frame-shaped flange is welded on the telescopic joint, and the telescopic joint is connected to the first frame-shaped flange through the second frame-shaped flange Connection, to realize the axial connection with the pipe gallery, so that while ensuring the overall strength and sealing, the expansion joint can be made into a prefabricated part, which is convenient for installation and disassembly.

Working principle: The integrated pipe gallery is an obtuse axial connection of arc-shaped corrugated plates, and the connection edge is fixed by a steel flange. Deformation damage, when the pipe body expands and contracts axially due to thermal expansion and contraction, it is limited by the steel flanges used in the circumferential connection, the expansion and contraction performance of the pipe body is greatly reduced, and it is easy to cause the axial bending and fracture of the pipe body. In the expansion joint of the utility model, the circumferential connection of the pipe body adopts a circular arc transition, which effectively relieves the concentrated stress on the pipe body when it moves in the radial direction, and the pipe body of the expansion joint is welded into one body, and its corrugation is good The scalability can alleviate the extrusion force generated by the axial expansion and contraction of the gallery body at both ends, effectively improving the service life of the entire comprehensive pipe gallery; the expansion joint and the gallery body are connected axially by section steel flanges, not only The strength and sealing performance are guaranteed, and the expansion joint can also be made into a prefabricated part to facilitate subsequent installation and replacement.

Beneficial effects: compared with the prior art, the utility model has the following advantages: (1) expansion joints are set in the pipe gallery to prevent the deformation of the gallery body due to thermal expansion and contraction, resulting in damage to the main gallery body; (2) The expansion joint adopts a circular arc transition rather than an obtuse angle transition. When it is applied, the stress concentration received is relieved, and the radial expansion is large, so that it can cope with the radial displacement of the corridors connected at both ends of the expansion joint, making the integrated pipe (3) The expansion joint can be welded by the unit plate instead of being fixed by a steel flange. Using the scalability of the corrugation, it can not only expand and contract along the axis direction, but also can cope with the tension at both ends of the expansion joint. The extrusion force generated by the expansion and contraction of the connected corridor body axis can also deal with uneven settlement and displacement in the lateral and vertical directions, and has strong adaptability, which improves the fatigue life of the comprehensive pipe gallery; (4) the expansion joint It is an integral part and is connected to the pipe gallery through a steel flange. While ensuring the overall strength and tightness, it can be made into a prefabricated part for easy installation and disassembly.

Description of drawings

Fig. 1 is the structural schematic diagram of main corridor body of the present utility model;

Fig. 2 is a structural schematic diagram of the utility model expansion joint;

Fig. 3 is a side view of the expansion joint of the utility model;

Fig. 4 is a front view of the second frame flange of the expansion joint of the present invention.

detailed description

Below in conjunction with accompanying drawing, the technical scheme of the utility model is further described.

As shown in Figure 1, the telescopic joint used for the underground comprehensive pipe gallery of the present utility model includes the first unit plates respectively located on the upper, lower and both sides to form a unit pipe joint along the circumferential direction, and the unit pipe joint is assembled along the axial direction Assembled to form a comprehensive pipe gallery.

As shown in Figure 2, the telescopic joint 3 is arranged in the pipe gallery to adapt to the axial deformation caused by thermal expansion and contraction of the gallery body. The telescopic joint 3 can be arranged between the main gallery body, or between the standard pipe section of the gallery body and the It is laid between non-standard pipe sections, or between the steel structure gallery and the concrete structure gallery. The expansion joint 3 is similar to the structure of the main corridor, and is formed by assembling the second unit plates 4 located on the upper, lower and two sides respectively along the circumferential direction, wherein the adjacent second unit plates 4 are connected by arc transitions , instead of an obtuse angle connection, so that the stress concentration on the expansion joint 3 is alleviated during application, the expansion and contraction amount is large, and the fatigue life is improved.

The axial ends of the expansion joints 3 are connected to the corridor body of the pipe gallery, and are arranged at intervals between the corridor bodies.

The adjacent second unit plates 4 in the expansion joint 3 are connected by arc corrugated angle plates 5, wherein both the arc corrugated angle plates 5 and the second unit plates 4 are steel plates, and the arc The corrugated angle plate 5 is welded smoothly with the splicing end of the corresponding second unit plate 4; after connection, the pipe section of the telescopic joint 3 is divided into four unit plates with a small arc and four angle plates with a large arc An integral arc cylindrical tube body welded in the circumferential direction.

As shown in FIG. 1 , the first unit plate 1 is an arc-shaped corrugated plate that arches toward the outside of the pipe gallery, and adjacent first unit plates 1 form obtuse angles connected in the circumferential direction.

As shown in Figure 2, the second unit plate 4 in the expansion joint 3 is an arc-shaped corrugated plate that is consistent with the arc of the first unit plate 1 in the pipe gallery. The arc cylindrical corrugated pipe body, using the scalability of the corrugation, can not only expand and contract along the axis direction, so as to cope with the extrusion force generated by the expansion and contraction of the gallery body connected to the two ends of the expansion joint, but also in the lateral and vertical directions. It can cope with uneven settlement and displacement, and has strong adaptability, which improves the fatigue life of the comprehensive pipe gallery.

The corrugated pipe body part of the expansion joint 3 is in the form of double-layer steel plates, so as to improve the expansion and contraction capacity and service life of the expansion joint.

The end of the gallery body is provided with a first steel flange, which is a first frame-shaped flange 6 formed by circumferential splicing of arc-shaped flanges arranged along the port of the gallery body. A frame flange 6 realizes axial assembly.

As shown in Figure 3, the axial end of the expansion joint 3 is provided with a second steel flange, and the expansion joint 3 is axially connected with the gallery body through the second steel flange. The second frame-shaped flange 7 formed by splicing the arc-shaped flanges arranged at the port of section 3 in the circumferential direction, the arc of the second frame-shaped flange 7 is consistent with the arc of the first frame-shaped flange 6, (the frame-shaped flange The structural shape is shown in Figure 4), and the second frame-shaped flange 7 is welded on the end of the expansion joint 3, and the connecting surface between the second frame-shaped flange 7 and the first frame-shaped flange 6 is evenly opened Screw holes, the expansion joint is connected with the bolts of the second frame flange and the first frame flange to realize the axial connection with the pipe gallery body, and a gasket is added at the connection surface to ensure the overall strength and At the same time of airtightness, the expansion joint can be made into a prefabricated part, which is convenient for later installation and replacement.

Claims (6)

1. A telescopic joint for an underground comprehensive pipe gallery, comprising first unit plates (1) located on the upper, lower and both sides respectively assembled in the circumferential direction to form a unit pipe joint (2), the unit pipe joint (2) Axially assembled to form a comprehensive pipe gallery; characterized in that: expansion joints (3) for adapting to axial deformation caused by thermal expansion and contraction of the gallery body or radial deformation caused by foundation settlement are arranged between the pipe galleries. 2. The telescopic joint for underground comprehensive utility gallery according to claim 1, characterized in that: said telescopic joint (3) consists of second unit plates (4) respectively located on the upper, lower and both sides along the circumferential direction It is formed by assembling, wherein the adjacent second unit plates (4) are connected by a circular arc transition, and the axial ends of the expansion joints (3) are connected with the corridor body of the pipe gallery. 3. The telescopic joint for underground comprehensive pipe gallery according to claim 2, characterized in that: the adjacent second unit plates in the telescopic joint (3) are connected by arc-shaped corrugated corner plates (5) . 4. The telescopic joint for underground comprehensive utility gallery according to claim 3, characterized in that: the arc-shaped corrugated angle plate (5) is welded smoothly with the splicing end of the corresponding second unit plate (4). 5. The telescopic joint for the underground integrated pipe gallery according to claim 1, characterized in that: the first unit plate (1) is an arc-shaped corrugated plate arched to the outside of the pipe gallery body, adjacent to the second An obtuse angle of circumferential connection is formed between one unit plate (1); the second unit plate (4) in the expansion joint (3) is an arc-shaped corrugation consistent with the arc of the first unit plate (1) in the pipe gallery plate. 6. The telescopic joint for underground comprehensive pipe gallery according to claim 5, characterized in that: the end of the gallery body is provided with a first shaped steel flange, and the first shaped steel flange is arranged along the port of the gallery body The first frame-shaped flange (6) formed by the circumferential splicing of arc-shaped flanges; the axial end of the expansion joint (3) is provided with a second steel flange, and the second steel flange is formed along the expansion joint A second frame-shaped flange (7) is formed by circumferential splicing of the arc-shaped flanges arranged on the ports, and the arc of the second frame-shaped flange (7) is consistent with the arc of the first frame-shaped flange (6).