Screw conveyor and shield machine

Abstract

The present invention discloses a screw conveyor and a shield machine, comprising: a shield sleeve connected to the front shield of the shield machine; an outer cylinder connected to the shield sleeve; a screw conveyor cylinder; an inner cylinder connected to the screw conveyor cylinder, the inner cylinder is arranged inside the outer cylinder and the shield sleeve, and there is a gap between the inner cylinder and the outer cylinder and between the inner cylinder and the shield sleeve; and an elastic seal arranged between the inner cylinder and the outer cylinder. When the shield machine turns, the inner cylinder squeezes the elastic seal, so that the inner cylinder drives the screw conveyor cylinder to float up, down, left and right within a certain range, avoiding excessive tail swing of the screw conveyor when the shield machine turns with a small curve radius, so that the screw conveyor can better meet the requirements of the shield machine for turning with a small curve radius, and improve the reliability of the use of the shield machine. Compared with the prior art that uses joint ball bearings to achieve the connection between the screw conveyor and the shield machine, the structure is simple, and the processing difficulty and production cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and more specifically, to a screw conveyor. In addition, the present invention also relates to a shield machine comprising the screw conveyor. Background Art

[0002] In tunnel projects such as urban subways and underground pipelines, shield machines are usually used for shield construction. The shield machine includes a screw conveyor, which passes through the shield body of the shield machine and is connected to the rear supporting system of the shield machine to transport the ballast excavated by the cutter head.

[0003] With the increasing demand for small curve tunnel construction, higher requirements are placed on the steering capability of shield machines. When turning at a small curve radius, the front and rear sections of the shield machine will produce relative movement. In order to avoid excessive swing of the tail of the screw conveyor due to the relative movement of the front and rear sections of the shield machine, an articulated device is provided on the screw conveyor so that the screw conveyor can better meet the requirements of the shield machine's small curve radius turning.

[0004] At present, the commonly used articulated device for screw conveyors is a joint ball bearing, however, the joint ball bearing has the problems of difficult processing and high cost.

[0005] In summary, how to reduce the processing difficulty and cost while enabling the screw conveyor to meet the small curve radius turning requirements of the shield machine is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a screw conveyor which can meet the requirement of a shield machine for turning with a small curve radius and has low processing difficulty and low cost.

[0007] Another object of the present invention is to provide a shield machine including the above-mentioned screw conveyor, wherein the screw conveyor can meet the requirement of the shield machine for turning with a small curve radius, and has low processing difficulty and low cost.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A screw conveyor, comprising:

[0010] A shield sleeve used to be connected to the front shield of the shield machine;

[0011] An outer cylinder connected to the shield sleeve;

[0012] Screw conveyor barrel;

[0013] An inner cylinder connected to the screw conveyor cylinder, the inner cylinder is arranged inside the outer cylinder and the shield sleeve, and there is a gap between the inner cylinder and the outer cylinder and between the inner cylinder and the shield sleeve;

[0014] An elastic sealing member is provided between the inner tube and the outer tube.

[0015] Optionally, the outer cylinder comprises a first outer cylinder and a second outer cylinder, both of which are separate structures, the first outer cylinder is connected to the shield sleeve, and the second outer cylinder is connected to the first outer cylinder;

[0016] The elastic sealing member comprises:

[0017] a first elastic sealing member disposed between the first outer tube and the inner tube;

[0018] A second elastic sealing member is provided between the second outer tube and the inner tube.

[0019] Optionally, the inner wall of the first outer cylinder is provided with a radially inwardly convex first shoulder, the inner wall of the second outer cylinder is provided with a radially inwardly convex second shoulder, an isolation ring is provided between the first shoulder and the second shoulder, and a first mounting groove for setting the first elastic seal is formed between the isolation ring and the first shoulder; a second mounting groove for setting the second elastic seal is formed between the isolation ring and the second shoulder.

[0020] Optionally, a first connecting flange is provided at one end of the inner tube, and a buffer is provided between the outer tube and the first connecting flange.

[0021] Optionally, a second connecting flange is provided at one end of the screw conveyor cylinder facing the inner cylinder, and the outer cylinder is connected to an end cover, which is located on a side of the second connecting flange away from the inner cylinder.

[0022] Optionally, it also includes:

[0023] a wing plate connected to the screw conveyor barrel;

[0024] A support base connected to an assembly machine crossbeam of a shield machine, wherein the wing plate is supported by the support base and can move relative to the support base.

[0025] Optionally, the support seat is provided with a cover plate for limiting the movement range of the wing plate.

[0026] Optionally, the outer cylinder is provided with a lubrication hole which is communicated with the gap between the inner cylinder and the outer cylinder.

[0027] Optionally, the shield sleeve is provided with a flushing port which penetrates radially; and / or, the inner wall of the shield sleeve is provided with a scraper plate.

[0028] A shield machine comprises a screw conveyor, wherein the screw conveyor is any one of the above-mentioned screw conveyors.

[0029] The screw conveyor provided by the present invention is applied to a shield machine. When the shield machine turns, the shield sleeve drives the outer cylinder to turn along with the front shield of the shield machine. During this process, the inner cylinder squeezes the elastic seal, and the gap between the inner cylinder and the outer cylinder can make way for the movement of the inner cylinder, so that the inner cylinder drives the cylinder of the screw conveyor to float up, down, left, and right within a certain range. That is, the inner cylinder and the outer cylinder are connected by an elastic seal, which is a flexible connection, which can reduce the impact on the screw conveyor during the turning process of the shield machine, and avoid excessive tail swing of the screw conveyor when the shield machine turns with a small curve radius, causing interference and wear of the screw conveyor. Therefore, the screw conveyor can better meet the requirements of the shield machine for turning with a small curve radius, and improve the reliability of the use of the shield machine.

[0030] In addition, compared with the prior art that uses joint ball bearings to connect the screw conveyor and the shield machine, this screw conveyor uses an outer cylinder to connect with the shield sleeve, and an inner cylinder to connect with the screw conveyor cylinder, and the inner cylinder and the outer cylinder are connected by an elastic seal to form a flexible connection structure, so that the screw conveyor meets the requirements of the shield machine for small curve radius turning. The structure is simple and can greatly reduce the processing difficulty and production cost.

[0031] The shield machine provided by the present invention includes the above-mentioned screw conveyor and has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a screw conveyor provided in a specific embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a flexible connection structure of a screw conveyor provided in a specific embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the structure of the wing plate, the support seat and the cover plate in the embodiment of the present invention.

[0036] Figures 1 to 3 The reference numerals in the figures are as follows:

[0037] 1 is a shield sleeve, 11 is a flushing port, 12 is a scraper plate, 2 is an outer cylinder, 21 is a first outer cylinder, 211 is a lubrication hole, 22 is a second outer cylinder, 3 is a screw conveyor cylinder, 4 is an inner cylinder, 51 is a first elastic seal, 52 is a second elastic seal, 6 is an isolation ring, 7 is a buffer, 8 is an end cover, 9 is a wing plate, 10 is a support seat, 101 is a cover plate, and 200 is an assembly machine beam. DETAILED DESCRIPTION

[0038] 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.

[0039] The core of the present invention is to provide a screw conveyor, which can meet the requirements of a shield machine with a small curve radius, and has low processing difficulty and low cost. Another core of the present invention is to provide a shield machine including the above-mentioned screw conveyor, which can meet the requirements of a shield machine with a small curve radius, and has low processing difficulty and low cost.

[0040] Please refer to Figure 1-Figure 3 , Figure 1 A schematic diagram of the structure of a screw conveyor provided in a specific embodiment of the present invention; Figure 2 A schematic diagram of a flexible connection structure of a screw conveyor provided in a specific embodiment of the present invention; Figure 3 Schematic diagram of the structure of the wing plate, the support seat and the cover plate in the embodiment of the present invention.

[0041] The present invention provides a screw conveyor, comprising a shield sleeve 1, an outer cylinder 2, a screw conveyor cylinder 3, an inner cylinder 4 and an elastic sealing member, wherein the shield sleeve 1 is used to be connected to a front shield of a shield machine; the outer cylinder 2 is connected to the shield sleeve 1; the inner cylinder 4 is connected to the screw conveyor cylinder 3, the inner cylinder 4 is arranged inside the outer cylinder 2 and the shield sleeve 1, and there are gaps between the inner cylinder 4 and the outer cylinder 2 and between the inner cylinder 4 and the shield sleeve 1; the elastic sealing member is arranged between the inner cylinder 4 and the outer cylinder 2.

[0042] When the screw conveyor is applied to a shield machine, when the shield machine turns, the shield sleeve 1 drives the outer cylinder 2 to turn along with the front shield of the shield machine. During this process, the inner cylinder 4 squeezes the elastic seal, and the gap between the inner cylinder 4 and the outer cylinder 2 allows the movement of the inner cylinder 4, so that the inner cylinder 4 drives the screw conveyor cylinder 3 to float up, down, left, and right within a certain range. That is, the inner cylinder 4 and the outer cylinder 2 are connected by an elastic seal, which is a flexible connection, which can reduce the impact on the screw conveyor during the turning process of the shield machine, and avoid the excessive tail swing of the screw conveyor when the shield machine turns with a small curve radius, causing interference and wear of the screw conveyor. The screw conveyor can better meet the requirements of the shield machine for turning with a small curve radius, and improve the reliability of the use of the shield machine.

[0043] In addition, compared with the prior art that uses joint ball bearings to connect the screw conveyor and the shield machine, the screw conveyor uses an outer cylinder 2 to connect with the shield sleeve 1, and an inner cylinder 4 to connect with the screw conveyor cylinder 3, and the inner cylinder 4 and the outer cylinder 2 are connected by an elastic seal to form a flexible connection structure, so that the screw conveyor meets the requirements of the shield machine for small curve radius turning. The structure is simple and can greatly reduce the difficulty of processing and production costs.

[0044] In order to reduce the difficulty of installing the elastic seal and the difficulty of processing the outer cylinder 2, on the basis of the above embodiment, the outer cylinder 2 includes a first outer cylinder 21 and a second outer cylinder 22, both of which are split structures, the first outer cylinder 21 is connected to the shield sleeve 1, and the second outer cylinder 22 is connected to the first outer cylinder 21; the elastic seal includes a first elastic seal 51 and a second elastic seal 52, the first elastic seal 51 is arranged between the first outer cylinder 21 and the inner cylinder 4; the second elastic seal 52 is arranged between the second outer cylinder 22 and the inner cylinder 4. That is to say, in this embodiment, the outer cylinder 2 is divided into two, so that the outer cylinder 2 has a split structure, so that the first outer cylinder 21 and the second outer cylinder 22 can be processed separately, thereby reducing the difficulty of processing. At the same time, by arranging the first elastic seal 51 between the first outer cylinder 21 and the inner cylinder 4 and arranging the second elastic seal 52 between the second outer cylinder 22 and the inner cylinder 4, compared with arranging the elastic seal between the integral outer cylinder 2 and the inner cylinder 4, the difficulty of installing the elastic seal can be reduced. It can be seen that this embodiment can facilitate production and assembly.

[0045] To facilitate the installation and positioning of the first elastic seal 51 and the second elastic seal 52, based on the above-mentioned embodiment, the inner wall of the first outer cylinder 21 is provided with a radially inwardly convex first shoulder, the inner wall of the second outer cylinder 22 is provided with a radially inwardly convex second shoulder, an isolation ring 6 is provided between the first shoulder and the second shoulder, and a first installation groove for setting the first elastic seal 51 is formed between the isolation ring 6 and the first shoulder; a second installation groove for setting the second elastic seal 52 is formed between the isolation ring 6 and the second shoulder.

[0046] That is to say, in this embodiment, by respectively providing shoulders (i.e., the first shoulder and the second shoulder) on the inner wall of the first outer tube 21 and the inner wall of the second outer tube 22, and providing an isolation ring 6 between the first shoulder and the second shoulder, the first shoulder, the isolation ring 6 and the second shoulder form two installation grooves (i.e., the first installation groove and the second installation groove) to respectively install and position the first elastic seal 51 and the second elastic seal 52. During installation, the first elastic seal 51 is directly embedded in the first installation groove, and the second elastic seal 52 is embedded in the second installation groove.

[0047] It should be noted that the first elastic seal 51 needs to extend out of the first installation groove, and the second elastic seal 52 needs to extend out of the second installation groove to ensure elastic sealing connection between the first outer tube 21 and the inner tube 4 and between the second outer tube 22 and the inner tube 4 .

[0048] It should be noted that the embodiment of the present invention does not limit the specific material of the elastic seal (such as the first elastic seal 51 and the second elastic seal 52). In one embodiment, the elastic seal is a rubber member.

[0049] In order to prevent foreign impurities from entering the interior of the shield sleeve 1 along the gap between the inner cylinder 4 and the outer cylinder 2, in one embodiment, the elastic seal is an annular structure to play a sealing role between the outer cylinder 2 and the inner cylinder 4, preventing foreign impurities from entering the interior of the shield sleeve 1 along the gap between the inner cylinder 4 and the outer cylinder 2.

[0050] In one embodiment, a first connection flange is provided at one end of the inner tube 4, and a buffer 7 is provided between the outer tube 2 and the first connection flange. The buffer 7 has a buffering effect, and the outer tube 2 can be prevented from directly contacting the first connection flange by providing the buffer 7, thereby preventing the outer tube 2 from colliding with the first connection flange to generate impact, wear, etc.

[0051] In one embodiment, a second connecting flange is provided at one end of the screw conveyor barrel 3 facing the inner barrel 4, and an end cover 8 is connected to the outer barrel 2, and the end cover 8 is located on the side of the second connecting flange away from the inner barrel 4. In other words, this embodiment utilizes the stopping and limiting function of the end cover 8 to effectively prevent the inner barrel 4 from falling out of the outer barrel 2.

[0052] In one embodiment, the end cover 8 is detachably connected to the outer cylinder 2, so that the end cover 8 can be removed at any time to facilitate assembly.

[0053] In one embodiment, the outer cylinder 2 includes a first outer cylinder 21 and a second outer cylinder 22 , and the end cover 8 is disposed at an end of the second outer cylinder 22 away from the first outer cylinder 21 .

[0054] It is understandable that the screw conveyor is relatively heavy as a whole and is a cantilever structure. In order to balance the weight of the screw conveyor, on the basis of the above embodiment, the screw conveyor also includes a wing plate 9 connected to the screw conveyor barrel 3 and a support seat 10 for connecting to the assembly machine cross beam 200 of the shield machine. The wing plate 9 is supported on the support seat 10 and can move relative to the support seat 10. In other words, when the inner cylinder 4 floats relative to the outer cylinder 2, the screw conveyor barrel 3 is driven to float together. At this time, the wing plate 9 is supported on the support seat 10, and the wing plate 9 moves along the surface of the support seat 10, and the support seat 10 is used to support the wing plate 9, thereby supporting the screw conveyor barrel 3 through the support wing plate 9, so that the swing of the screw conveyor is more stable.

[0055] In one embodiment, the surface of the support seat 10 is provided with an arc surface, and the wing plate 9 is supported on the arc surface and can slide along the arc surface to further improve the stability of the movement of the screw conveyor.

[0056] In addition, in one embodiment, the support seat 10 is provided with a cover plate 101 for limiting the range of motion of the wing plate 9. That is, the present embodiment uses the cover plate 101 to limit the position of the wing plate 9 to prevent the wing plate 9 from tilting, which can effectively ensure the reliability of the swing of the screw conveyor.

[0057] In one embodiment, the outer cylinder 2 is provided with a lubrication hole 211, which is communicated with the gap between the inner cylinder 4 and the outer cylinder 2. That is to say, in this embodiment, by injecting grease into the lubrication hole 211, a good lubrication effect can be achieved between the outer cylinder 2 and the inner cylinder 4, so that the elastic seal works in a lubricated environment, making the elastic seal less likely to be damaged, and prolonging the service life of the elastic seal, which is conducive to improving the reliability of the structure.

[0058] In one embodiment, the outer cylinder 2 includes a first outer cylinder 21 and a second outer cylinder 22, a lubrication hole 211 is provided on at least one of the first outer cylinder 21 and the second outer cylinder 22, and the isolation ring 6 is provided with an oil passage so that the first elastic seal 51 and the second elastic seal 52 on both sides of the isolation ring 6 can work in a better lubrication environment.

[0059] In addition, in order to prevent the mud from being fixed in the gap between the inner tube 4 and the outer tube 2 and affecting the floating of the inner tube 4, on the basis of the above embodiment, the shield sleeve 1 is provided with a flushing port 11 that penetrates radially; and / or, the inner wall of the shield sleeve 1 is provided with a scraper plate 12. It should be noted that the flushing port 11 and the scraper plate 12 are both arranged close to the outer tube 2 to enhance the effect of removing the mud. It is understandable that by filling the flushing port 11 with flushing liquid, the flushing liquid can be used to flush away the mud on the outer wall of the inner tube 4, thereby avoiding the influence of the fixed connection of the mud on the floating of the inner tube 4. In addition, when the shield machine turns, the scraper plate 12 rotates with the shield sleeve 1, so that the scraper plate 12 and the outer wall of the inner tube 4 generate relative movement, which can scrape off the mud on the outer wall of the inner tube 4 and enhance the mud removal effect.

[0060] In one embodiment, the scraper blade 12 is an annular scraper blade 12 .

[0061] In addition to the above-mentioned screw conveyor, the present invention also provides a shield machine including the screw conveyor disclosed in the above-mentioned embodiment. For the structures of other parts of the shield machine, please refer to the prior art and will not be described in detail herein.

[0062] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0063] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] The screw conveyor and shield machine provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A screw conveyor, characterized in that: include: A shield sleeve (1) for connecting to a front shield of a shield machine; An outer cylinder (2) connected to the shield sleeve (1); Screw conveyor barrel (3); an inner cylinder (4) connected to the screw conveyor cylinder (3), the inner cylinder (4) being arranged inside the outer cylinder (2) and the shield sleeve (1), and having a gap between the inner cylinder (4) and the outer cylinder (2) and between the inner cylinder (4) and the shield sleeve (1); An elastic sealing member provided between the inner cylinder (4) and the outer cylinder (2); The outer cylinder (2) comprises a first outer cylinder (21) and a second outer cylinder (22), both of which are separate structures, the first outer cylinder (21) is connected to the shield sleeve (1), and the second outer cylinder (22) is connected to the first outer cylinder (21); The elastic sealing member comprises: a first elastic sealing member (51) disposed between the first outer tube (21) and the inner tube (4); a second elastic sealing member (52) disposed between the second outer tube (22) and the inner tube (4); The inner wall of the first outer cylinder (21) is provided with a first radially inwardly convex shoulder, and the inner wall of the second outer cylinder (22) is provided with a second radially inwardly convex shoulder. An isolating ring (6) is provided between the first isolating shoulder and the second isolating shoulder. A first mounting groove for arranging the first elastic sealing member (51) is formed between the isolating ring (6) and the first isolating shoulder; and a second mounting groove for arranging the second elastic sealing member (52) is formed between the isolating ring (6) and the second isolating shoulder.

2. The screw conveyor according to claim 1, characterized in that: A first connecting flange is provided at one end of the inner cylinder (4), and a buffer component (7) is provided between the outer cylinder (2) and the first connecting flange.

3. The screw conveyor according to claim 1, characterized in that: A second connecting flange is provided at one end of the screw conveyor cylinder (3) facing the inner cylinder (4), and an end cover (8) is connected to the outer cylinder (2). The end cover (8) is located on a side of the second connecting flange away from the inner cylinder (4).

4. The screw conveyor according to claim 1, characterized in that: Also includes: A wing plate (9) connected to the screw conveyor barrel (3); A support seat (10) connected to an assembly machine cross beam (200) of a shield machine, wherein the wing plate (9) is supported on the support seat (10) and can move relative to the support seat (10).

5. The screw conveyor according to claim 4, characterized in that: The support seat (10) is provided with a cover plate (101) for limiting the movement range of the wing plate (9).

6. The screw conveyor according to claim 1, characterized in that: The outer cylinder (2) is provided with a lubrication hole (211) which is in communication with the gap between the inner cylinder (4) and the outer cylinder (2).

7. The screw conveyor according to claim 1, characterized in that: The shield body sleeve (1) is provided with a flushing port (11) penetrating radially; and / or the inner wall of the shield body sleeve (1) is provided with a scraper plate (12).

8. A shield machine, comprising a screw conveyor, characterized in that: The screw conveyor is the screw conveyor according to any one of claims 1 to 7.

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