Backrest mechanism for pipe jacking machine and pipe jacking machine

Abstract

The utility model belongs to underground engineering construction technical field, concretely relates to a backrest mechanism and pipe jacking machine for pipe jacking machine, and the pipe jacking machine has the support plate for supporting backrest mechanism, and the backrest mechanism includes the base setting on the support plate, the ball head setting on the base and the backrest plate, is equipped with the ball socket for receiving the ball head on the backrest plate, and the ball head is located in the ball socket and sets up in the ball socket rotation. The backrest mechanism of the utility model is applied to the pipe jacking machine and carries out the pipe jacking construction, and the backrest plate is in abutment with the lateral wall of work area, and the backrest plate can rotate around the ball head, can effectively adapt to the uneven lateral wall.

Description

Technical Field

[0001] This utility model belongs to the field of underground engineering construction technology, specifically relating to a backrest mechanism for a pipe jacking machine and the pipe jacking machine. Background Technology

[0002] Pipe jacking is a trenchless construction method. When using a pipe jacking machine, a backrest is needed to support the equipment. During the pipe jacking process, the thrust generated by the main thrust cylinder is concentrated on the backrest, which places certain requirements on the load-bearing capacity, stability and adaptability of the backrest mechanism.

[0003] Currently, the backrests of pipe jacking machines mainly come in two structural forms: traditional concrete backrests and partially prefabricated backrests. The former requires a large amount of concrete and is for single use only and cannot be reused. The latter are mostly steel structures connected by bolts. Although the thickness of the backrest can be adjusted, the backrest mechanism requires that both the front and rear sides be flat and subjected to force. It is not adaptable to uneven well walls and is not convenient to install, requiring manual adjustment of the position between the backrest and the pipe jacking machine. Summary of the Invention

[0004] In view of this, the present invention provides an improved backrest mechanism for a pipe jacking machine and a pipe jacking machine, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] To achieve the above objectives, the first technical solution adopted by this utility model is as follows: A backrest mechanism for a pipe jacking machine, wherein the pipe jacking machine has a support plate for supporting the backrest mechanism, the backrest mechanism includes a base disposed on the support plate, a ball head disposed on the base and a backrest plate, the backrest plate having a ball socket for receiving the ball head, the ball head being located in the ball socket and rotatably disposed within the ball socket.

[0006] Optionally, in the aforementioned backrest mechanism for a pipe jacking machine, the backrest mechanism further includes a cover connected to the backrest plate and used to prevent the ball head from dislodging from the ball socket.

[0007] Optionally, the cover and the backrest are connected by bolts.

[0008] In the aforementioned backrest mechanism for a pipe jacking machine, the backrest mechanism may optionally include a plurality of elastic elements disposed between the support plate or base and the backrest plate, wherein the plurality of elastic elements are distributed at circumferential intervals along the ball head.

[0009] Optionally, the plurality of elastic elements are disposed between the support plate and the backrest plate.

[0010] Optionally, the elastic element is a spring, with one end of the spring connected to the backrest and the other end connected to the support plate.

[0011] Optionally, the spring is a tension spring.

[0012] In the aforementioned backrest mechanism for a pipe jacking machine, optionally, the base includes a base plate fixedly connected to the support plate and a connecting rod integrally connected to the base plate, the ball head being integrally connected to the connecting rod, and the outer diameter of the connecting rod being smaller than the outer diameter of the ball head.

[0013] Optionally, the substrate, connecting rod, and ball head are integrally formed.

[0014] In the aforementioned backrest mechanism for a pipe jacking machine, optionally, a plurality of stiffening plates are arranged radially around the ball head on one side of the backrest facing the base.

[0015] Optionally, in the aforementioned backrest mechanism for pipe jacking machines, the backrest plate has a pre-drilled hoisting hole.

[0016] In the aforementioned backrest mechanism for pipe jacking machines, optionally, the base and the support plate are connected by bolts.

[0017] The second technical solution adopted by this utility model is: a pipe jacking machine, including a support plate and the backrest mechanism for the pipe jacking machine described above, wherein the backrest mechanism is disposed on the support plate.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: When the backrest mechanism of this utility model is applied to the pipe jacking machine for pipe jacking construction, the backrest plate abuts against the side wall of the working area, and the backrest plate can rotate around the ball head, which can effectively adapt to uneven side walls. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the structure of a pipe jacking machine using a backrest mechanism according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a backrest mechanism according to an embodiment of the present invention. Figure 3 for Figure 2A side view of the backrest mechanism (elastic components are not shown). Figure 4 for Figure 2 A schematic diagram of the structure of the base and ball joint of the backrest mechanism; Figure label: 100. Backrest mechanism; 200. Support plate; 1. Base; 10. Base plate; 11. Connecting rod; 2. Ball head; 3. Backrest panel; 4. Elastic element; 5. Rib plate; 6. Cover; 7. Bolt; 8. Lifting hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art should fall within the protection scope of this utility model.

[0022] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0023] In addition, in the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical connection, direct connection, or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] As described in the background section, traditional pipe jacking machines use either a concrete backrest, which is single-use and cannot be reused, or a prefabricated backrest structure, which, while allowing for thickness adjustment, is not adaptable to uneven well walls. This application redesigns the backrest mechanism for pipe jacking machines, adopting a ball-joint structure that helps distribute load evenly, avoids stress concentration, and effectively adapts to uneven well walls, thus enhancing its applicability. For its application in pipe jacking machines, see [link to relevant documentation]. Figure 1 As shown, the rear of the pipe jacking machine has a vertically arranged support plate 200, which is used to support the backrest mechanism 100. The backrest mechanism 100 is installed on the support plate 200.

[0025] The following is combined Figures 2 to 4 The structure of a backrest mechanism according to an embodiment of this application is described in detail.

[0026] As shown in the figure, the backrest mechanism 100 includes a fixed base 1, a ball head 2 disposed on the base 1, and a backrest plate 3. The backrest plate 3 has a ball socket for receiving the ball head 2. The ball head 2 is located in the ball socket and is rotatably disposed in the ball socket. The base 1 is fixedly disposed on the support plate 200.

[0027] The base 1 and the support plate 200 are connected by bolts, allowing the backrest mechanism to move together with the pipe jacking machine, and making the assembly and disassembly of the backrest mechanism convenient. In other embodiments, the base 1 and the support plate 200 can also be installed using lifting rings, with the appropriate connection method selected based on the gap between the support plate of the pipe jacking machine and the backrest mechanism.

[0028] See Figure 4 The base 1 includes a base plate 10 and a connecting rod 11 integrally connected to the base plate 10. The ball head 2 is integrally connected to the connecting rod 11. The outer diameter of the connecting rod 11 is smaller than the outer diameter of the ball head 2. In an optional embodiment, the base plate 10, the connecting rod 11, and the ball head 2 are integrally formed. The base plate 10 can be fixedly connected to the support plate 3 by bolts 7.

[0029] When this backrest mechanism is applied to a pipe jacking machine for pipe jacking construction, the backrest plate 3 abuts against the side wall of the working area, and the backrest plate 3 can rotate around the ball head 2. During pipe jacking construction, it can effectively adapt to uneven side walls and has stronger adaptability.

[0030] See also Figure 2 The backrest mechanism also includes a plurality of elastic elements 4 disposed between the support plate 200 and the backrest plate 3, the plurality of elastic elements 4 being distributed at intervals along the circumference of the ball head 2. In other alternative embodiments, the plurality of elastic elements 4 may also be disposed between the base 1 and the backrest plate 3.

[0031] The elastic element 4 can limit the rotation angle of the backrest 3 to a certain extent and allow the backrest 3 to return to its initial state.

[0032] In an optional embodiment, the elastic element 4 is a spring, with one end of the spring connected to the backrest plate 3 and the other end connected to the support plate 200. Alternatively, both ends of the spring can be connected to the backrest plate 3 and the support plate 200 respectively through intermediate connecting parts, and each intermediate connecting part is connected to the backrest plate 3 and the support plate 200 by bolts.

[0033] The spring can be a tension spring. When the backrest mechanism is installed on the support plate of the pipe jacking machine and the backrest mechanism is in its initial state, the spring extends horizontally along the front-back direction of the pipe jacking machine.

[0034] See also Figure 2The backrest mechanism 100 also includes a cover 6 connected to the backrest plate 3 and used to prevent the ball head 2 from disengaging from the ball socket. Optionally, the cover 6 is bolted to the backrest plate 3. In other alternative embodiments, the cover 6 is welded to the backrest plate 3.

[0035] To enhance the load-bearing capacity of the backrest panel 3, see [link / reference]. Figure 2 and Figure 3 Multiple stiffening plates 5 are radially arranged around the ball head 2 on the side of the backrest panel 3 facing the base 1. The stiffening plates 5 can be set on the side of the backrest panel 3 by welding. The backrest panel 3 also has pre-reserved lifting holes 8 to facilitate the lifting of the backrest mechanism.

[0036] The main components of this backrest mechanism, such as the base, backrest plate, and stiffening plates, are all made of steel, allowing for reuse. The ball-joint design helps distribute the load evenly on the backrest plate, avoiding stress concentration and extending the service life of the backrest mechanism. It also adapts more effectively to uneven well walls. Furthermore, multiple elastic elements not only limit the rotation angle of the backrest plate to a certain extent but also allow the backrest plate to return to its initial state.

[0037] The above embodiments are only used to illustrate the present utility model, and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A backrest mechanism for a pipe jacking machine, wherein the pipe jacking machine has a support plate for supporting the backrest mechanism, characterized in that, The backrest mechanism includes a base disposed on the support plate, a ball head disposed on the base, and a backrest plate. The backrest plate has a ball socket for receiving the ball head, and the ball head is located in the ball socket and is rotatably disposed in the ball socket.

2. The backrest mechanism for a pipe jacking machine according to claim 1, characterized in that, The backrest mechanism also includes a cover connected to the backrest panel and used to prevent the ball head from dislodging from the ball socket.

3. The backrest mechanism for a pipe jacking machine according to claim 2, characterized in that, The cover and the backrest are connected by bolts.

4. The backrest mechanism for a pipe jacking machine according to claim 1, characterized in that, The backrest mechanism further includes a plurality of elastic elements disposed between the support plate or base and the backrest plate, wherein the plurality of elastic elements are distributed at circumferential intervals along the ball head.

5. The backrest mechanism for a pipe jacking machine according to claim 4, characterized in that, The plurality of elastic elements are disposed between the support plate and the backrest plate; and / or, The elastic element is a spring, with one end of the spring connected to the backrest and the other end connected to the support plate.

6. The backrest mechanism for a pipe jacking machine according to claim 5, characterized in that, The spring is a tension spring.

7. The backrest mechanism for a pipe jacking machine according to claim 1, characterized in that, The base includes a base plate fixedly connected to the support plate and a connecting rod integrally connected to the base plate. The ball head is integrally connected to the connecting rod, and the outer diameter of the connecting rod is smaller than the outer diameter of the ball head.

8. The backrest mechanism for a pipe jacking machine according to claim 7, characterized in that, The substrate, connecting rod, and ball head are integrally formed.

9. The backrest mechanism for a pipe jacking machine according to claim 1, characterized in that, The backrest panel, facing the base, has multiple stiffening plates arranged radially around the ball head; and / or, The backrest panel has pre-drilled mounting holes; and / or, The base and the support plate are connected by bolts.

10. A pipe jacking machine, comprising a support plate, characterized in that, The pipe jacking machine further includes a backrest mechanism for the pipe jacking machine as described in any one of claims 1 to 9, the backrest mechanism being disposed on the support plate.

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