Main drive water jacket structure of shield machine

Abstract

The present invention discloses a shield machine main drive water jacket structure, including: an outer sealing ring, the inner ring surface of which is circumferentially provided with a water cavity; a water jacket sealing plate, which is integrally fixed to the inner ring surface of the outer sealing ring and closes the water cavity; a cooling water injection port, which is radially distributed along the outer sealing ring and communicated with the water cavity; a first grease injection port, which is radially distributed on the inner ring surface of the outer sealing ring and the first end is communicated with the water cavity, and the second end of the first grease injection port extends along the axial direction of the outer sealing ring; a second grease injection port, which is radially distributed along the water jacket sealing plate and is opposite to the first grease injection port; a split grease pipe joint, including a first joint and a second joint, the first joint is fixed to the first end of the first grease injection port and the height is not less than the outer diameter of the water jacket sealing plate, and the second joint is fixedly connected to the first joint and the second grease injection port. The present invention optimizes the arrangement of water inlets and outlets by optimizing the joint form, welding sequence, and splicing form, reduces the welding amount, ensures the reliability of the weld, and reduces the risk of leakage.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, and in particular to a main drive water jacket structure of a shield machine. Background Art

[0002] When the cutter head drive is running, the seal ring and the seal ring contact surface produce relative movement, which in turn generates heat in the seal ring. This is particularly prominent when the peripheral line speed is high, which will affect the service life of the seal ring. Therefore, the design of the cooling water jacket is crucial to ensure the reliability of the main drive seal.

[0003] The main drive of large-diameter shield machines mostly adopts internal meshing gear transmission, which greatly limits the space for the layout of the sealing ring lubricating grease pipeline and the water jacket cooling pipeline. Due to structural limitations, the grease pipeline can only supply grease to the sealing ring through the water jacket. Considering the convenience of pipe connection and maintenance, the sealing ring grease lubrication pipeline adopts an internal structure.

[0004] The main drive sealing system needs to be equipped with a large number of grease pipes and cooling water pipes, and the grease pipes need to pass through the cooling water chamber to reach the sealing grease chamber, which increases the difficulty of interface weld detection and the risk of leakage. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shield machine main drive water jacket structure, which can reduce the amount of welding, ensure the reliability of the weld, and reduce the risk of leakage.

[0006] The technical solution adopted by the present invention is: a shield machine main drive water jacket structure, comprising:

[0007] An outer sealing ring, wherein the inner ring surface of the outer sealing ring is circumferentially provided with a water cavity;

[0008] A water jacket sealing plate, integrally fixed to the inner ring surface of the outer sealing ring and sealing the water cavity;

[0009] A cooling water injection port, distributed along the radial direction of the outer sealing ring and connected to the water cavity;

[0010] A first grease injection port, radially distributed on the inner ring surface of the outer sealing ring and having a first end connected to the water cavity, and a second end of the first grease injection port extending along the axial direction of the outer sealing ring;

[0011] A second grease injection port is distributed along the radial direction of the water jacket sealing plate and is opposite to the first grease injection port;

[0012] The split grease pipe joint includes at least one first joint and one second joint, wherein the first joint is fixed to the first end of the first grease injection port and the height thereof is not less than the outer diameter of the water jacket sealing plate, and the second joint is fixedly connected to the first joint and the second grease injection port.

[0013] Optionally, the water jacket sealing plate is annular, with an outer diameter equal to the inner diameter of the outer sealing ring and a width greater than the width of the water cavity.

[0014] Optionally, two ends of the outer annular surface of the water jacket sealing plate are respectively welded and fixed to the inner annular surfaces of the outer sealing rings outside the two ends of the water cavity.

[0015] Optionally, the middle position of the inner ring surface of the outer sealing ring is continuously recessed inward along the circumferential direction to form the water cavity.

[0016] Optionally, a sealing ring is provided at one end of the cooling water injection port close to the outer ring surface of the outer sealing ring.

[0017] Optionally, the cooling water pipe radially passes through the outer periphery of the power box and is connected to the cooling water inlet, and a sealing ring is used to seal the joint cover plate of the cooling water pipe and the mounting surface of the power box, and the power box is mounted on the outer ring surface of the outer sealing ring.

[0018] Optionally, the first end of the first grease injection port is stepped and has a larger diameter than the second grease injection port.

[0019] Optionally, the outer diameter of the first joint matches the stepped port and is connected by welding, and the outer diameter of the second joint matches the second grease injection port and is connected by welding.

[0020] Optionally, the first joint and the second joint are coaxially sleeved or threaded.

[0021] Optionally, the first joint is fixed to the outer sealing ring before the water jacket sealing plate, and the second joint is fixed to the water jacket sealing plate after the water jacket sealing plate and the first joint.

[0022] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0023] Compared with the traditional main drive water jacket, the present invention optimizes the joint form, welding sequence, splicing form, optimizes the inlet and outlet layout, reduces the welding amount, ensures the reliability of the weld, and reduces the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the distribution of grease pipelines of the main drive water jacket structure of a shield machine provided in an embodiment of the present invention.

[0026] Figure 2 for Figure 1 A partial enlarged schematic diagram of .

[0027] Figure 3 A schematic diagram of the distribution of cooling water pipelines of the main drive water jacket structure of a shield machine provided in an embodiment of the present invention.

[0028] The symbols in the accompanying drawings are as follows:

[0029] 1-power box, 2-external sealing ring, 3-water jacket sealing plate, 4-water chamber, 5-toothed seal, 6-grease pipeline, 7-cooling water pipeline, 8-grease pipe joint, 81-first joint, 82-second joint, 9-sealing ring, 10-water pipe joint, 11-water pipe joint end cover, 12-cooling water injection port. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Since shield machine construction is a high-risk industry, product quality stability and high reliability must be guaranteed to ensure smooth and efficient completion of the project. The cutterhead main drive is the core component of the shield machine, and once a failure occurs, it will be catastrophic. Failure of the cutterhead main drive seal is an important factor that causes the main drive to fail to work properly, and the seal cooling and lubrication system is the key to ensuring the service life and reliability of the seal. Even for a detachable cutterhead drive in the tunnel, replacing the seal ring will bring great construction risks, and once the seal fails, the impact on the cutterhead drive is fatal.

[0032] Existing technical solutions for water jacket: The grease pipe joint adopts an integral type, the inner joint weld is welded in front of the water jacket sealing plate, the water jacket sealing plate can only be welded in sections, and there are many welds. The inlet and outlet water pipes are arranged axially and connected to the outside of the main drive power box through the inside of the large bearing.

[0033] Among them, in the traditional grease pipe joint solution, the outer diameter of the water jacket partition is larger than the joint height. After the joint is welded, the partition cannot be installed as a whole and needs to be installed and welded in sections, which increases the partition welds and welding amount. The water jacket sealing plate is the cooling water pressure-bearing surface, and the risk of too many welds is also high.

[0034] In addition, the axial arrangement of the inlet and outlet water pipes needs to be connected to the outside of the power box through the main drive core component - the inside of the large bearing, which has a long path and a high risk of leakage. The axial water pipe can only be arranged between the two connecting bolt holes of the large bearing, which has a small space, a small water pipe diameter, and a low water flow rate, which may affect the cooling effect.

[0035] The present invention provides a novel shield machine main drive water jacket structure. Different from the traditional grease pipe joint which adopts an integral type, the grease pipe joint of the present invention adopts a split type. In addition, the cooling water pipe is changed to a radial arrangement and connected to the water jacket structure through the outer periphery of the power box. Compared with the traditional axial access, this access method has a shorter distance and a smaller risk of leakage.

[0036] See also Figures 1 to 3 The embodiment of the present invention provides a shield machine main drive water jacket structure, which mainly includes an outer sealing ring 2, a water jacket sealing plate 3, a cooling water injection port 12, a grease injection port, an outer sealing ring pipeline and a grease pipe joint 8. Among them, the outer sealing ring pipeline includes a grease pipeline 6 and a cooling water pipeline 7. The grease pipeline 6 is connected to the grease injection port through the grease pipe joint 8, and the cooling water pipeline 7 is connected to the cooling water injection port 12 through the water pipe joint 10.

[0037] The inner ring surface of the outer sealing ring 2 is provided with a water cavity 4 in the circumferential direction. In this embodiment, the middle position of the inner ring surface of the outer sealing ring 2 is continuously recessed inward along the circumferential direction to form an annular water cavity 4. The water jacket sealing plate 3 is integrally fixed to the inner ring surface of the outer sealing ring 2 and closes the water cavity 4. The water jacket sealing plate 3 is annular, with an outer diameter equal to the inner diameter of the outer sealing ring 2 and a width greater than the width of the water cavity 4. The two ends of the outer ring surface of the water jacket sealing plate 3 are respectively welded and fixed to the inner ring surface of the outer sealing ring 2 outside the two ends of the water cavity 4.

[0038] The cooling water injection port 12 is distributed along the radial direction of the outer sealing ring 2 and is connected to the water cavity 4. The cooling water injection port 12 is used to connect to the cooling water pipeline 7. Figure 3As shown, the cooling water inlet 12 is provided with two sealing rings 9 at one end of the outer ring surface close to the outer sealing ring 2, and the water pipe joint 10 of the cooling water pipeline 7 is directly sealed between the two sealing rings 9 and the water cavity passage of the outer sealing ring. The cooling water pipeline 7 radially passes through the outer periphery of the power box 1 to connect to the cooling water inlet 12, and the water pipe joint end cover 11 at the outer end of the cooling water pipe is sealed with a sealing ring between the mounting surface of the power box 1, and the power box 1 is mounted on the outer ring surface of the outer sealing ring 2. The radial arrangement of the cooling water inlet 12 makes the access distance of the cooling water pipeline shorter and the risk of leakage smaller.

[0039] Cooperate with Figure 1 and Figure 2 As shown, the grease injection port further includes a first grease injection port and a second grease injection port. The first grease injection port is arranged on the outer sealing ring 2, and the second grease injection port is arranged on the water jacket sealing plate 3. The first grease injection port and the second grease injection port are located opposite to each other and are both connected to the water cavity 4. Specifically, the first grease injection port is radially distributed on the inner ring surface of the outer sealing ring 2 and the first end is connected to the water cavity 4. The second end of the first grease injection port extends along the axial direction of the outer sealing ring 2 to the end surface of the outer sealing ring 2. The second grease injection port is radially distributed along the water jacket sealing plate 3 and is located opposite to the first grease injection port.

[0040] The grease pipe joint 8 adopts a split grease pipe joint, including at least one first joint 81 and a second joint 82. The outer diameter of the first joint 81 is larger than the outer diameter of the second joint 82, and the inner diameter of the first joint 81 is adapted to the inner diameter of the second joint 82. The two can be coaxially connected by sleeve connection or screw connection. The first joint 81 is fixed to the first end of the first grease injection port and the height is not less than the outer diameter of the water jacket sealing plate 3. Therefore, after the first joint 81 is installed, it will not affect the integral installation of the water jacket sealing plate 3. The water jacket sealing plate 3 can be installed without segmentation, and the welding process is more convenient. There is no butt weld, which ensures the reliability of the weld and reduces the risk of leakage. The second joint 82 is fixedly connected to the first joint 81 and the second grease injection port.

[0041] Preferably, the first end of the first grease injection port is stepped and has a larger diameter than the second grease injection port. The outer diameter of the first joint 81 matches the stepped port and is connected by welding, and the outer diameter of the second joint 82 matches the second grease injection port and is connected by welding.

[0042] The grease pipe joint 8 of the present invention adopts a split type, and the welding type first welds the first joint 81 and the first grease injection port on the inner ring surface of the outer sealing ring 2 to ensure that the weld between the first joint 81 and the outer sealing ring 2 is reliable, and then the water jacket sealing plate 3 and the outer sealing ring 2 are installed and welded to close the water chamber 4. Since the height of the first joint 81 is higher than the outer diameter of the water jacket sealing plate 3, the installed first joint 81 will not affect the installation of the water jacket sealing plate 3. At this time, the water jacket sealing plate 3 can be installed as a whole without the need for segmented installation. The welding is easy, the weld is reduced, and the risk of leakage is reduced. Finally, after the welding of the water jacket sealing plate 3 and the outer sealing ring 2 is completed, the second joint 82 is connected to the first joint 81 and the water jacket sealing plate 3. The second joint 82 is first inserted or screwed into the first joint 81. After it is installed in place, the second joint 82 and the water jacket sealing plate 3 are welded. The advantage is that welding is easy, the water jacket sealing plate 3 can be installed without segmentation, and there is no butt weld. The processing is convenient, the welding is easy, and the weld reliability is high. After the first joint 81 is welded, the weld and the grease pipe must be tested for pressure to ensure that there is no leakage before continuing to the next step.

[0043] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield machine main drive water jacket structure, characterized in that: include: An outer sealing ring, wherein the inner ring surface of the outer sealing ring is circumferentially provided with a water cavity; A water jacket sealing plate, integrally fixed to the inner ring surface of the outer sealing ring and sealing the water cavity; A cooling water injection port, distributed along the radial direction of the outer sealing ring and connected to the water cavity; A first grease injection port, radially distributed on the inner ring surface of the outer sealing ring and having a first end connected to the water cavity, and a second end of the first grease injection port extending along the axial direction of the outer sealing ring; A second grease injection port is distributed along the radial direction of the water jacket sealing plate and is opposite to the first grease injection port; The split grease pipe joint comprises at least one first joint and one second joint, wherein the first joint is fixed to the first end of the first grease injection port and the height thereof is not less than the outer diameter of the water jacket sealing plate, and the second joint is fixedly connected to the first joint and the second grease injection port; During welding, first weld the first joint and the first grease injection port on the inner ring surface of the outer sealing ring to ensure that the weld between the first joint and the outer sealing ring is reliable, and then install and weld the water jacket sealing plate and the outer sealing ring. The closed water cavity and the water jacket sealing plate are installed as a whole. After the welding of the water jacket sealing plate and the outer sealing ring is completed, connect the second joint with the first joint and the water jacket sealing plate. First insert or screw the second joint into the first joint. After it is installed in place, weld the second joint and the water jacket sealing plate.

2. The shield machine main drive water jacket structure according to claim 1, characterized in that: The water jacket sealing plate is annular, with an outer diameter equal to the inner diameter of the outer sealing ring and a width greater than the width of the water cavity.

3. The shield machine main drive water jacket structure according to claim 2, characterized in that: The two ends of the outer annular surface of the water jacket sealing plate are respectively welded and fixed to the inner annular surfaces of the outer sealing rings at the outer sides of the two ends of the water cavity.

4. The shield machine main drive water jacket structure according to claim 1, characterized in that: The middle position of the inner ring surface of the outer sealing ring is continuously recessed inward along the circumferential direction to form the water cavity.

5. The shield machine main drive water jacket structure according to claim 1, characterized in that: The cooling water injection port is provided with a sealing ring at one end close to the outer ring surface of the outer sealing ring.

6. The shield machine main drive water jacket structure according to claim 1, characterized in that: The cooling water pipe radially passes through the outer periphery of the power box and is connected to the cooling water injection port. The joint cover plate of the cooling water pipe and the installation surface of the power box are sealed with a sealing ring. The power box is installed on the outer ring surface of the outer sealing ring.

7. The shield machine main drive water jacket structure according to claim 1, characterized in that: The first end of the first grease injection port is stepped and has a larger diameter than the second grease injection port.

8. The shield machine main drive water jacket structure according to claim 7, characterized in that: The outer diameter of the first joint matches the stepped port and is connected by welding, and the outer diameter of the second joint matches the second grease injection port and is connected by welding.

9. The shield machine main drive water jacket structure according to claim 1, characterized in that: The first joint is coaxially sleeved or threaded with the second joint.

10. The shield machine main drive water jacket structure according to claim 1, characterized in that: The first joint is fixed to the outer sealing ring before the water jacket sealing plate, and the second joint is fixed to the water jacket sealing plate after the water jacket sealing plate and the first joint.

Images