Speed reduction part structure of tube push bench

Abstract

The invention discloses a speed reduction part structure of a pipe jacking machine in the technical field of trenchless tunneling type pipeline laying. The speed reduction part structure aims at solving the problem that in the prior art, a speed reduction part structure of a pipe jacking machine is short in service life of an outer seal of a box body. The method comprises the steps that the speed reduction box body is cooled through flowing of slurry in a slurry cooling cavity channel, then the temperature of a transmission assembly in the speed reduction box body is reduced, heat transmitted to a seal outside the box body by the transmission assembly is reduced, and the aging speed of the seal outside the box body is reduced; the labyrinth sealing structure can relieve the degree of slurry and gravel permeating into the box body outer seal along the labyrinth sealing structure on the basis of the labyrinth-shaped path of the labyrinth sealing structure, lubricating grease is continuously provided for the labyrinth sealing structure through the lubricating grease pipeline, the slurry and gravel permeating into the labyrinth sealing structure are discharged, double sealing of the box body outer seal is achieved, and the service life of the box body outer seal is prolonged. The abrasion of the outer seal of the box body is reduced, and the aging speed of the outer seal of the box body is reduced.

Description

Technical Field

[0001] The invention relates to a speed reducing part structure of a pipe jacking machine, belonging to the technical field of pipe jacking machines. Background Art

[0002] Pipe jacking technology is a method of laying pipes underground using the reduction structure of a pipe jacking machine without excavating the ground.

[0003] For the pipe jacking machine, the transmission assembly in the reduction gear box drives the cutterhead connector to rotate, and the cutterhead connector is connected to the cutterhead base, and then the cutterhead base rotates; wherein, an external seal is provided between the cutterhead connector and the reduction gear box to achieve a dynamic sealing effect, but during the pipe jacking operation, external dirt, mud and sand and gravel penetrate into the external seal along the gap between the cutterhead base and the reduction gear box, thereby accelerating the wear and aging of the external seal; the heat generated by the transmission assembly during operation will also accelerate the aging of the external seal of the box, and the aging of the external seal of the box will accelerate the wear inside the reduction gear structure of the pipe jacking machine.

[0004] Therefore, the existing deceleration structure of the pipe jacking machine has the problem of short service life of the outer sealing of the box body. Summary of the Invention

[0005] The purpose of the present application is to overcome the deficiencies in the prior art and to provide a speed reduction structure for a pipe jacking machine with a longer sealing life outside the box body.

[0006] To achieve the above objectives, this application is implemented using the following technical solutions: The present application provides a deceleration structure of a pipe jacking machine, comprising: The reduction box body has a mud cooling cavity formed therein, and the mud enters from one end of the mud cooling cavity and is discharged from the other end; An outer seal is provided between the reduction gear box and the cutter head connector, and the cutter head base is connected to the reduction gear box through a labyrinth seal structure, and the labyrinth seal structure is used to seal the outer seal of the box from the outside; A grease pipe is used to provide grease to the labyrinth seal structure.

[0007] In some embodiments of the present application, a reinforcing rib plate is further provided in the mud cooling cavity, and a slurry hole is opened on the reinforcing rib plate, and the opening direction of the slurry hole matches the mud flow direction in the mud cooling cavity.

[0008] In some embodiments of the present application, the reinforcing ribs are evenly distributed radially around the midpoint of the deceleration structure of the pipe jacking machine, and the reinforcing ribs are connected to the inner wall of the reduction housing along the axial direction of the deceleration structure of the pipe jacking machine.

[0009] In some embodiments of the present application, the mud cooling channel is arranged on the side of the reduction gearbox close to the cutter base and directly in thermal contact with the transmission assembly.

[0010] In some embodiments of the present application, the surface of the side of the reduction gearbox close to the cutter base is provided with the flushing hole in communication with the mud cooling channel.

[0011] In some embodiments of the present application, the at least two mud cooling channels are distributed in a circle with the midpoint of the reduction part structure of the pipe jacking machine as the center, and the inlet and outlet of the mud cooling channel are respectively located at the two ends of the radial direction of the reduction part structure of the pipe jacking machine.

[0012] In some embodiments of the present application, the outlet of the mud cooling channel is in communication with the mud pipeline, the reduction part structure of the pipe jacking machine further comprises a gear oil tank, the gear oil in the transmission assembly exchanges with the gear oil tank through the gear oil pipeline, and the mud pipeline is in thermal contact with the gear oil tank.

[0013] In some embodiments of the present application, the gear oil tank is sleeved outside the mud pipeline.

[0014] In some embodiments of the present application, the reduction part structure of the pipe jacking machine has a plurality of lubricating grease pipelines which further provide lubricating grease to the outer seal of the gearbox.

[0015] In some embodiments of the present application, a pressure monitor for detecting the pressure of the lubricating grease is further included.

[0016] Compared with the prior art, the present application has the following beneficial effects: The reduction part structure of the pipe jacking machine provided by the present application utilizes the flow of mud in the mud cooling channel to cool the reduction gearbox, thereby reducing the temperature of the transmission assembly in the reduction gearbox, reducing the heat transferred by the transmission assembly to the outer seal of the gearbox, and reducing the aging speed of the outer seal of the gearbox. The labyrinth seal structure can alleviate the degree of penetration of mud and sand along the labyrinth seal structure into the outer seal of the gearbox based on its labyrinth-like path, and continuously provides lubricating grease to the labyrinth seal structure through the lubricating grease pipeline to discharge the mud and sand penetrated into the labyrinth seal structure, thereby achieving double sealing of the outer seal of the gearbox and reducing the wear of the outer seal of the gearbox, and reducing the aging speed of the outer seal of the gearbox. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0018] Figure 1 1 is a schematic diagram of a cross-sectional structure of the speed reduction portion of the pipe jacking machine provided in this embodiment along the central axis; Figure 2 yes Figure 1 Schematic diagram of the structure of the middle area A; Figure 3 yes Figure 1 Schematic diagram of the structure of the middle area B; Figure 4 This is a schematic diagram of the semi-hidden structure of the speed reduction unit of the pipe jacking machine provided in this embodiment, showing the direction of grease flow facing the cutter head base; Figure 5 This is a schematic diagram of a semi-hidden structure of the speed reduction portion of the pipe jacking machine provided in this embodiment, showing the direction of mud flow facing the cutterhead base; Figure 6 This is a semi-hidden structural diagram of the reduction gear structure of the pipe jacking machine provided in this embodiment, showing the mud flow direction from the side of the reduction gear box; Figure 7 This is a schematic structural diagram of the speed reduction structure of the pipe jacking machine provided in this embodiment, viewed from the rear of the cutterhead connector; In the figure: 1. reduction gear box; 1.1. mud cooling cavity; 1.2. reinforcing rib plate; 1.3. slurry hole; 1.4. flushing hole; 2. transmission assembly; 3. outer seal of the box; 4. cutterhead connector; 5. sealing seat; 6. inner seal of the box; 7. cutterhead base; 21. gear shaft; 22. first bearing; 23. second bearing; 24. slewing bearing; 8. labyrinth seal structure; 9. grease pipe; 10. grease pipe outlet; 11. mud pipe; 12. gear oil tank. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the present application / the present application's embodiments to clearly and completely describe the technical solutions of the present application / the present application's embodiments. Obviously, the described embodiments are only part of the embodiments of the present application / the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application / the present application, its application, or use. Example 1

[0020] This embodiment provides a deceleration structure of a pipe jacking machine to solve the problem of easy aging of the outer seal 3 of the box body of the deceleration structure of the pipe jacking machine in the prior art.

[0021] refer to Figures 1 to 6 The speed reduction structure of the pipe jacking machine provided in this embodiment includes: The reduction gearbox 1 has a mud cooling cavity 1.1 formed therein, and the mud enters from one end of the mud cooling cavity 1.1 and is discharged from the other end; An outer seal 3 is provided between the reduction gear box body 1 and the cutter head connector 4. The cutter head base 7 is connected to the reduction gear box body 1 through a labyrinth seal structure 8. The labyrinth seal structure 8 is used to seal the outer seal 3 from the outside. Grease pipe 9, reference Figure 2 The arrows shown are used to provide grease to the labyrinth seal structure 8 .

[0022] When the pipe jacking machine performs pipe jacking operations, mud will be transported from the rear to the front, and the output position of the mud is close to the reduction gear box 1. Therefore, the reduction gear structure of the pipe jacking machine provided in this embodiment utilizes the flow of mud in the mud cooling cavity 1.1 to cool the reduction gear box 1, thereby reducing the temperature of the transmission component 2 in the reduction gear box 1, and the heat transferred from the transmission component 2 to the outer seal 3 of the box body is reduced, and the aging rate of the outer seal 3 of the box body is reduced; the labyrinth sealing structure 8 can reduce the probability of mud and gravel penetrating into the outer seal 3 of the box body along the labyrinth sealing structure 8 based on its own labyrinth-shaped path, and continuously provide grease to the labyrinth sealing structure 8 through the grease pipe 9 to discharge the mud and gravel penetrating into the labyrinth sealing structure 8, thereby realizing double sealing of the outer seal 3 of the box body, reducing the wear of the outer seal 3 of the box body, and reducing the aging rate of the outer seal 3 of the box body. Example 2

[0023] This embodiment provides a deceleration structure of a pipe jacking machine. This embodiment is optimized on the basis of the first embodiment to improve the technical effect and refine the technical solution. For details not fully described in this embodiment, please refer to the first embodiment.

[0024] Figure 1 In the reduction gear structure of the pipe jacking machine shown, the transmission assembly 2 is installed in the reduction gear housing 1. The transmission assembly 2 includes a gear shaft 22, a second bearing 23, and a bearing 21 that are interconnected. The bearing 21 is installed in a slot inside the reduction gear housing 1. The gear shaft 22 and the second bearing 23 are used to support the bearing 21 sleeved on the gear shaft 22 from both ends. The transmission assembly 2 also includes a slewing bearing 24. The inner ring of the slewing bearing 24 is fixed to the mounting seat of the reduction gear housing 1. The cutterhead connector 4 is bolted to the slewing bearing 24 and connected to the cutterhead base 7. The bearing 21 and slewing bearing 24 of the transmission assembly 2 form an external meshing transmission.

[0025] exist Figure 2 It can be seen that the cutter disc base 7 is connected to the cutter disc connector 4 and the reduction gear box body 1 through a labyrinth sealing structure 8. The labyrinth sealing structure 8 presents multiple continuous reverse "several" structures, and the labyrinth sealing structure 8 blocks the outer seal 3 of the sealing box body from the middle position.

[0026] When the reduction gear structure of the pipe jacking machine is used for pipe jacking, the reduction gear box 1 will be subjected to the axial pressure of the cutter head base 7 and the mud soil, and the mud cooling cavity 1.1 may reduce the structural strength of the reduction gear box 1. As one embodiment, refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , a reinforcing rib plate 1.2 is also provided in the mud cooling cavity 1.1, and a slurry hole 1.3 is provided on the reinforcing rib plate 1.2. The direction of the slurry hole 1.3 matches the direction of the mud flow in the mud cooling cavity 1.1. It is worth noting that, Figure 4 and Figure 5 In order to facilitate the display of the reinforcing rib plate 1.2, the body wall of the reduction gearbox 1 near the cutter head base 7 is hidden. Figure 6 The outer wall of the reduction gearbox body 1 is hidden.

[0027] The reinforcing ribs 1.2 can strengthen the structural strength of the reduction gear box 1 and improve its ability to withstand various pressures during pipe jacking operations. At the same time, the reduction gear box 1 is generally made of metal material with good thermal conductivity. By arranging the reinforcing ribs 1.2 made of metal material, the heat exchange efficiency between the mud and the reduction gear box 1 can be improved, and the reduction gear box 1 plays a role similar to a heat sink.

[0028] As one example, refer to Figure 4 and Figure 5 The reinforcing ribs 1.2 are evenly distributed radially with the midpoint of the deceleration structure of the pipe jacking machine as the center point, and the reinforcing ribs 1.2 are connected to the inner wall of the reduction box body 1 along the axial direction of the deceleration structure of the pipe jacking machine.

[0029] Similarly, reference Figure 4 The grease pipe 9 is also evenly distributed in a radial shape with the midpoint of the deceleration structure of the pipe jacking machine as the center point. Figure 4 The figure shows the flow direction of the grease in the grease pipe 9.

[0030] The evenly distributed reinforcing ribs 1.2 can evenly bear the pressure of the pipe jacking operation and evenly control the deformation of the reduction box body 1. At the same time, the reinforcing ribs 1.2 are connected to the inner wall of the reduction box body 1 along the axial direction of the reduction structure of the pipe jacking machine to shorten the heat conduction distance. The radially even distribution with the midpoint of the reduction structure of the pipe jacking machine can also adapt to the flow direction of the mud.

[0031] refer to Figure 1 and Figure 3 As one embodiment, the mud cooling channel 1.1 is provided on the side of the reduction gear box 1 close to the cutter head base 7, that is, the mud cooling channel 1.1 is provided at the front end of the reduction gear structure of the pipe jacking machine, and the mud cooling channel 1.1 is in direct thermal contact with the transmission component 2. Figure 3For example, the mud cooling cavity 1.1 is separated from the outside world by only one layer of the wall of the reduction gearbox 1, which reduces the space occupied by the transmission component 2 and facilitates the entry of mud.

[0032] As one example, refer to Figure 4 and Figure 5 The surface of the reduction box body 1 close to the cutter head base 7, that is, the side located at the front end of the reduction structure of the pipe jacking machine, is provided with a flushing hole 1.4 connected to the mud cooling cavity 1.1. The mud can be sprayed out from the flushing hole 1.4 to properly clean the cutter head surface.

[0033] refer to Figure 5 As one embodiment, at least two mud cooling cavities 1.1 are distributed in a circle with the midpoint of the deceleration structure of the pipe jacking machine as the center, and the inlet and outlet of the mud cooling cavity 1.1 are respectively located at the radial ends of the deceleration structure of the pipe jacking machine. Figure 5 and Figure 6 The arrows in the figure show the path of the mud cooling channel 1.1 flowing from one radial end of the reduction gear structure of the pipe jacking machine to the other, covering most of the reduction gear box 1 to cool the internal transmission assembly 2. The symmetrical distribution of multiple mud cooling channels 1.1 can reduce the flow path length of a single mud cooling channel 1.1. Figure 5 and Figure 6 The arrows shown in the figure are the flow directions of the mud in the mud cooling channel 1.1.

[0034] As one example, refer to Figure 7 On the side of the cutterhead connector 4 facing away from the cutterhead base 7, i.e., at the rear end of the reduction gear box 1, a mud pipe 11 is provided. A suction device is provided at the other end of the mud pipe 11. The outlet of the mud cooling cavity 1.1 is connected to the mud pipe 11. Most of the mud is discharged through the mud pipe 11, and the rest is ejected through the flushing hole 1.4. On the side where the mud pipe 1 is located, the reduction gear structure of the pipe jacking machine also includes a gear oil tank 12. The gear oil in the transmission assembly 2 is exchanged with the gear oil tank 12 through the gear oil pipe. The mud pipe 11 and the gear oil tank 12 are in thermal contact. The gear oil tank 12 dissipates heat through the mud pipe 11. The gear oil tank 12 can also precipitate impurities and particles. The gear oil in the transmission assembly 2 is exchanged with the gear oil tank 12 through the oil pump provided on the gear oil pipe, thereby increasing the service life of the transmission assembly 2.

[0035] As one example, refer to Figure 7 The gear oil tank 12 is sleeved outside the mud pipe 11, and heat exchange is performed between the mud and the gear oil through the pipe wall of the mud pipe 11.

[0036] As one example, refer to Figure 4 、 Figure 5 and Figure 6The deceleration structure of the pipe jacking machine has multiple grease pipes 9, which also provide grease to the outer seal 3 of the box body.

[0037] As one example, refer to Figure 2 and Figure 3 The system also includes a pressure monitor for detecting grease pressure. Since each external seal 3 and labyrinth seal structure 8 has a required grease injection volume, multiple grease pipes 9, distributed as evenly as possible around the circumference, are provided to meet the requirements of each external seal 3 and labyrinth seal 8. The output data from the pressure monitor can be used to determine the quality of the grease and the condition of the external seal 3. A low pressure indicates grease injection, while a pressure close to zero indicates grease leakage.

[0038] In one embodiment, the pipe jacking machine's speed reduction structure also includes a grease seal injection system. The grease pipe 9 and pressure monitor are also integrated into the grease seal injection system. The grease seal injection system can monitor and control the grease injection pressure, thereby monitoring the integrity of the seal. The grease seal injection system can also be equipped with an oil pressure overload protection device and a liquid level alarm device, and a one-way valve is installed on each grease pipe 9.

[0039] refer to Figure 1 In addition to the box body seal 3, a box body seal 6 is also provided between the cutter head connector 4 and the reduction gear box body 1, and the box body seal 6 is installed in the sealing seat 5.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connected", "connection", "set", "provided with", "located", "mounted", "set up" and the like should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. "Hinged" includes "rotary connection".

[0042] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can also be made, which should be considered as the protection scope of the present application.

Claims

1. A speed reduction structure of a pipe jacking machine, characterized in that: include: The reduction box (1) has a mud cooling cavity (1.1) formed therein, and the mud enters from one end of the mud cooling cavity (1.1) and is discharged from the other end; An outer seal (3) is provided between the reduction gear box body (1) and the cutter head connector (4); the cutter head base (7) is connected to the reduction gear box body (1) via a labyrinth seal structure (8); and the labyrinth seal structure (8) is used to seal the outer seal (3) from the outside. A grease pipe (9) is used to provide grease to the labyrinth seal structure (8).

2. The speed reduction structure of the pipe jacking machine according to claim 1, characterized in that: A reinforcing rib plate (1.2) is further provided in the mud cooling cavity (1.1), and a slurry hole (1.3) is provided on the reinforcing rib plate (1.2), wherein the direction of the slurry hole (1.3) matches the direction of slurry flow in the mud cooling cavity (1.1).

3. The speed reduction structure of the pipe jacking machine according to claim 2, characterized in that: The reinforcing rib plates (1.2) are evenly distributed radially with the midpoint of the deceleration structure of the pipe jacking machine as the center point, and the reinforcing rib plates (1.2) are connected to the inner wall of the reduction box body (1) along the axial direction of the deceleration structure of the pipe jacking machine.

4. The speed reduction structure of the pipe jacking machine according to any one of claims 1 to 3, characterized in that: The mud cooling cavity (1.1) is provided on a side of the reduction gearbox (1) close to the cutterhead base (7) and is in direct thermal contact with the transmission assembly (2).

5. The speed reduction structure of the pipe jacking machine according to claim 4, characterized in that: The surface of the reduction box body (1) on the side close to the cutter head base (7) is provided with the flushing hole (1.4) which is in communication with the mud cooling cavity (1.1).

6. The speed reduction structure of the pipe jacking machine according to claim 4, characterized in that: At least two mud cooling cavities (1.1) are distributed in a circle with the midpoint of the speed reduction structure of the pipe jacking machine as the center, and the inlet and outlet of the mud cooling cavities (1.1) are respectively located at two radial ends of the speed reduction structure of the pipe jacking machine.

7. The speed reduction structure of the pipe jacking machine according to claim 6, characterized in that: The outlet of the mud cooling cavity (1.1) is connected to the mud pipeline (11). The speed reduction structure of the pipe jacking machine also includes a gear oil tank (12). The gear oil in the transmission assembly (2) is exchanged with the gear oil tank (12) through the gear oil pipe. The mud pipeline (11) and the gear oil tank (12) are in thermal contact.

8. The speed reduction structure of the pipe jacking machine according to claim 7, characterized in that: The gear oil tank (12) is sleeved outside the mud pipeline (11).

9. The speed reduction structure of the pipe jacking machine according to claim 1, characterized in that: The speed reduction structure of the pipe jacking machine has a plurality of grease pipes (9), and the grease pipes (9) also provide grease to the outer seal (3) of the box body.

10. The speed reduction structure of the pipe jacking machine according to claim 1 or 9, characterized in that: Also included is a pressure monitor for detecting grease pressure.

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