Shield assembly of shield tunneling machine

Abstract

The invention discloses a shield tunneling machine shield assembly, and relates to the technical field of shield tunneling machines, the shield tunneling machine shield assembly comprises an inner shield assembly, two sides of the inner shield assembly are provided with side block assemblies, and the two side block assemblies are symmetrically arranged. The shield is designed to be of an inner and outer shield structure, the bottom ends of the side sub-blocks are rotationally connected with one end of the lower sub-block of the outer shield through the connecting assemblies, when the whole machine retreats, the side sub-blocks can be driven by the first hydraulic rods to rotate in the direction close to the inner shield body, and the mounting blocks slide in the corresponding sliding grooves, so that the two side sub-blocks get close inwards; after the two side sub-blocks draw close inwards, the second hydraulic rod can drive the upper sub-block to move downwards, so that the outer diameter of the outer shield is reduced, the outer shield can retreat under the condition that the shield does not need to be disassembled, after retreating is completed, the upper sub-block and the two side sub-blocks are restored to the original positions through the first hydraulic rod or the second hydraulic rod, the labor amount of workers is reduced, and the working efficiency is improved. And the failure rate of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, and in particular to a shield assembly of a shield machine. Background Art

[0002] Shield machines are widely used in tunnel construction for water conservancy and hydropower, rail transit, and municipal engineering. At the same time, more requirements are also placed on the construction capabilities of shield machines.

[0003] When the same shield machine needs to complete the excavation of multiple main tunnels and branch tunnels of the same diameter, after the main tunnel is excavated, the shield machine needs to return to the tunnel entrance to complete the excavation of the branch tunnel. Since the tunnels that have been excavated have been supported, the main machine of the shield machine cannot be retracted. The existing retraction method is mainly to disassemble the main machine into parts and transport them to the next starting point for reinstallation and excavation. This retraction method not only has low work efficiency, but also increases the equipment failure rate due to multiple disassembly and assembly of the equipment.

[0004] Therefore, it is necessary to invent a shield assembly of a shield machine to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a shield assembly for a tunnel boring machine to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a shield assembly of a shield machine, comprising an inner shield assembly, side block assemblies are arranged on both sides of the inner shield assembly, and the two side block assemblies are symmetrically arranged, an upper block assembly is arranged on the top of the inner shield assembly, a connecting assembly is arranged on the inner bottom of the side block assembly, and the side block assembly is rotatably connected to the inner shield assembly through the connecting assembly;

[0007] The inner shield assembly includes an outer shield lower block, and the outer shield lower block is located at the bottom of the inner shield body;

[0008] The side block assembly includes a side block, and the bottom end of the side block is fitted and connected to one end of the lower block of the outer shield;

[0009] The upper block assembly includes an upper block, and two ends of the upper block are respectively fitted and connected with the top ends of the side blocks;

[0010] The connecting assembly comprises a straight rod, and both ends of the straight rod are integrally provided with connecting blocks.

[0011] Preferably, the inner side wall of the lower block of the outer shield is integrally formed with a plurality of connection blocks distributed at equal intervals, and the top end of the connection block is fixedly welded to the bottom end of the inner shield body.

[0012] Preferably, first hydraulic rods are fixedly installed at the middle parts of both sides of the inner shield body, and sliding rods are fixedly installed at the telescopic ends of the first hydraulic rods.

[0013] Preferably, convex plates are fixedly provided on both sides of the top of the inner shield body, and a plurality of limit grooves distributed at equal intervals are provided on the top of the convex plates. A second hydraulic rod is fixedly installed in the middle of the top of the inner shield body, and the telescopic end of the second hydraulic rod is fixedly connected to the middle of the inner side wall of the upper block.

[0014] Preferably, an arc block is integrally formed in the middle of the inner side wall of the side block, and a sliding groove matched with the sliding rod is opened inside the arc block, and a connecting groove is opened through the inner wall of the sliding groove on one side close to the inner shield body.

[0015] Preferably, a plurality of mounting blocks distributed at equal intervals are fixedly provided at the bottom end of the inner wall of the side block, and a circular groove is penetrated through the front end of the mounting block close to the inner shield body, and a first arc-shaped baffle is provided at the bottom end of the side block, and the first arc-shaped baffle is located on the inner side of the lower block of the outer shield, and the top end of the first arc-shaped baffle is fixedly welded to the bottom end of the mounting block.

[0016] Preferably, arc grooves are provided at both ends of the inner side walls of the upper block, and a second arc baffle plate adapted to the arc groove is movably arranged inside the arc groove, and limiting slide grooves are provided on the front and back inner walls of the arc groove, and limiting slide rods are fixedly provided on the front and back ends of the second arc baffle plate away from the side block, and the limiting slide rods are adapted to the limiting slide grooves, and the limiting slide rods are made of polytetrafluoroethylene, have excellent strength and extremely small friction coefficient, and reduce wear.

[0017] Preferably, a protective strip is fixedly provided at one end of the second arc-shaped baffle plate close to the side block, and the protective strip is made of polytetrafluoroethylene. Polytetrafluoroethylene has an extremely small friction coefficient, which reduces friction, facilitates the smooth sliding of the second arc-shaped baffle plate, and reduces wear. Multiple limit rods compatible with the limit grooves are fixedly provided on both sides of the middle part of the inner wall of the upper block, and the multiple limit rods correspond one-to-one to the multiple limit grooves.

[0018] Preferably, the bottom end of the connecting block is fixedly welded to one end of the inner wall of the lower block of the outer shield, and an annular groove corresponding to a plurality of mounting blocks is formed on the straight rod, and the annular groove is adapted to the circular groove.

[0019] Preferably, both ends of the upper block are inclined, and the inclined setting allows the side blocks to rotate smoothly. Both ends of the inner wall of the lower block of the outer shield are rounded, and the rounded corner setting can reduce the wear of the first arc-shaped baffle. The lower block of the outer shield, the upper block and the two side blocks form a circular ring.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The present invention designs the shield into an inner and outer shield structure, and divides the outer shield into three parts: an outer shield lower block, an upper block and two side blocks, forming a split design. At the same time, the bottom end of the side block is rotatably connected to one end of the outer shield lower block through a connecting assembly. When the whole machine retreats, the side block can be driven by the first hydraulic rod to rotate in a direction close to the inner shield body, and at the same time, the mounting block slides inside the corresponding sliding groove, so that the two side blocks are brought inwardly, and after the two side blocks are brought inwardly, the second hydraulic rod can drive the upper block to move downward, thereby reducing the outer diameter of the outer shield, and then retreating without disassembling the shield. After the retreat is completed, the upper block and the two side blocks can be restored to their original positions by the first hydraulic rod or the second hydraulic rod, which not only reduces the workload of the staff, but also reduces the failure rate of the equipment. At the same time, the internal electrical components can be protected without disassembling the outer shield.

[0022] 2. The present invention arranges the first arc baffle so that during the rotation of the side block, the first arc baffle rotates with the side block, but the outer side wall of the first arc baffle will remain in contact with one end of the inner side wall of the lower block of the outer shield, thereby preventing external gravel or dust from entering the interior of the outer shield. At the same time, through the arrangement of the second arc baffle, the second arc baffle can slide inside the arc groove. When the side block rotates inward, the second arc baffle slides downward due to gravity, keeping the protection strip at the bottom end of the second arc baffle in contact with the outer side wall of the side block, thereby blocking the gap between the upper block of the column and the side block, preventing gravel and dust from entering, thereby keeping the interior of the equipment clean and protecting the internal electrical components from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the inner shield assembly of the present invention.

[0025] Figure 3 It is a schematic diagram of the side block assembly structure of the present invention.

[0026] Figure 4 It is a schematic diagram of the side block cross-sectional view structure of the present invention.

[0027] Figure 5 It is a schematic diagram of the upper block assembly structure of the present invention.

[0028] Figure 6 It is a schematic diagram of the upper sub-block bottom structure of the present invention.

[0029] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at A

[0030] Figure 8Schematic diagram of the second arc baffle structure of the present invention

[0031] Fig. 9 Schematic diagram of the connection assembly structure of the present invention

[0032] In the figure: 1, inner shield assembly; 2, side block assembly; 3, upper block assembly; 4, connecting assembly; 101, inner shield body; 102, outer shield lower block; 103, connecting block; 104, first hydraulic rod; 105, sliding rod; 106, second hydraulic rod; 107, convex plate; 108, limiting groove; 201, side block; 202, arc block; 203, sliding groove; 204, connecting groove; 205, mounting block; 206, circular groove; 207, first arc baffle; 301, upper block; 302, arc groove; 303, second arc baffle; 304, limiting slide groove; 305, limiting rod; 306, limiting slide rod; 307, protection strip; 401, straight rod; 402, connecting block; 403, annular groove. DETAILED DESCRIPTION

[0033] 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.

[0034] The present invention provides Figure 1-9 A shield assembly of a shield machine shown in the figure includes an inner shield assembly 1, side block assemblies 2 are arranged on both sides of the inner shield assembly 1, and the two side block assemblies 2 are symmetrically arranged, an upper block assembly 3 is arranged on the top of the inner shield assembly 1, a connecting assembly 4 is arranged on the inner bottom of the side block assembly 2, and the side block assembly 2 is rotatably connected to the inner shield assembly 1 through the connecting assembly 4.

[0035] Further, the inner shield assembly 1 includes 101 and an outer shield lower block 102, and the outer shield lower block 102 is located at the bottom of the inner shield body 101, and the inner side wall of the outer shield lower block 102 is integrally formed with a plurality of equally spaced connecting blocks 103, and the top of the connecting block 103 is fixedly welded to the bottom of the inner shield body 101, and the middle of both sides of the inner shield body 101 are fixedly installed with a first hydraulic rod 104, and the telescopic end of the first hydraulic rod 104 is fixedly provided with a sliding rod 105, and the middle of the top of the inner shield body 101 is fixedly installed with a second hydraulic rod 106, and the telescopic end of the second hydraulic rod 106 is fixedly connected to the middle of the inner side wall of the upper block 301;

[0036] The side block assembly 2 includes a side block 201, and the bottom end of the side block 201 is fitted and connected with one end of the outer shield lower block 102. An arc block 202 is integrally formed in the middle of the inner wall of the side block 201, and a sliding groove 203 adapted to the sliding rod 105 is opened inside the arc block 202. A connecting groove 204 is penetrated through the inner wall of the sliding groove 203 close to the inner shield body 101. A plurality of mounting blocks 205 distributed at equal intervals are fixedly arranged at the bottom end of the inner wall of the side block 201, and a circular groove 206 is penetrated through the end of the front side of the mounting block 205 close to the inner shield body 101. The mounting block 205 is fixed by welding to improve the overall strength.

[0037] The upper block assembly 3 includes an upper block 301, and the two ends of the upper block 301 are respectively connected to the top of the side block 201, and the shield is designed to form an inner and outer shield structure, and the outer shield is divided into three parts: the outer shield lower block 102, the upper block 301 and the two side blocks 201, forming a split design. At the same time, the bottom end of the side block 201 is rotatably connected to one end of the outer shield lower block 102 through the connecting assembly 4. When the whole machine retreats, the side block 201 can be driven by the first hydraulic rod 104 to rotate in the direction close to the inner shield body 101, and the mounting block 205 is at the corresponding The sliding groove 203 slides inside to make the two side blocks 201 move inwards, and after the two side blocks 201 move inwards, the second hydraulic rod 106 can drive the upper block 301 to move downwards, thereby reducing the outer diameter of the outer shield, and then can be retreated without disassembling the shield. After the retreat is completed, the upper block 301 and the two side blocks 201 can be restored to their original positions through the first hydraulic rod 104 or the second hydraulic rod 106, which not only reduces the workload of the staff, but also reduces the failure rate of the equipment. At the same time, the internal electrical components can be protected without disassembling the outer shield.

[0038] The connecting assembly 4 includes a straight rod 401, and both ends of the straight rod 401 are integrally formed with connecting blocks 402, the bottom end of the connecting block 402 is fixedly welded to one end of the inner wall of the lower block 102 of the outer shield, and an annular groove 403 corresponding to multiple mounting blocks 205 is opened on the straight rod 401, and the annular groove 403 is adapted to the circular groove 206.

[0039] A first arc baffle 207 is provided at the bottom end of the side block 201, and the first arc baffle 207 is located on the inner side of the lower block 102 of the outer shield, the top of the first arc baffle 207 is fixedly welded to the bottom end of the mounting block 205, arc grooves 302 are provided at both ends of the inner wall of the upper block 301, and a second arc baffle 303 adapted to the arc groove 302 is movably provided inside the arc groove 302, and limiting slide grooves 304 are provided on the front and back inner walls of the arc groove 302, and limiting slide bars 306 are fixedly provided at the front and back ends of the second arc baffle 303 away from the side block 201, and the limiting slide bar 306 is adapted to the limiting slide groove 304, and a protective strip 307 is fixedly provided at the end of the second arc baffle 303 close to the side block 201, through the first arc baffle 207 The setting of the first arc baffle 207 is that during the rotation of the side block 201, the first arc baffle 207 rotates with the side block 201, but the outer side wall of the first arc baffle 207 will remain in contact with one end of the inner side wall of the lower block 102 of the outer shield, thereby preventing external gravel or dust from entering the interior of the outer shield. At the same time, through the setting of the second arc baffle 303, the second arc baffle 303 can slide inside the arc groove 302. When the side block 201 rotates inward, the second arc baffle 303 slides downward due to gravity, keeping the protection strip 307 at the bottom end of the second arc baffle 303 in contact with the outer side wall of the side block 201, thereby blocking the gap between the upper block 301 and the side block 201, preventing gravel and dust from entering, thereby keeping the interior of the equipment clean and protecting the internal electrical components from damage.

[0040] Secondly, both ends of the upper block 301 are inclined, and both ends of the inner wall of the outer shield lower block 102 are rounded. The outer shield lower block 102, the upper block 301 and the two side blocks 201 form a ring. The top of the inner shield body 101 is fixed with convex plates 107 on both sides, and the top of the convex plate 107 is provided with a plurality of equally spaced limiting grooves 108. A plurality of limiting rods 305 matched with the limiting grooves 108 are fixedly provided on both sides of the middle part of the inner wall of the upper block 301, and the plurality of limiting rods 305 correspond to the plurality of limiting grooves 108 one by one. By setting the plurality of limiting grooves 108 and the limiting rods 305, the upper block 301 can be limited, thereby improving the stability of the upper block 301.

[0041] Working principle of the present invention:

[0042] When the whole machine retreats, the side blocks 201 can be driven by the first hydraulic rod 104 to rotate in the direction close to the inner shield body 101, and the mounting block 205 slides inside the corresponding sliding groove 203, so that the two side blocks 201 move inwardly, and after the two side blocks 201 move inwardly, the second hydraulic rod 106 can drive the upper block 301 to move downward, thereby reducing the outer diameter of the outer shield, and then retreating without disassembling the shield. After the retreat is completed, the upper block 301 and the two side blocks 201 can be restored to their original positions by the first hydraulic rod 104 or the second hydraulic rod 106;

[0043] When the two side blocks 201 move inward, the second arc baffle 303 can slide inside the arc groove 302. When the side block 201 rotates inward, the second arc baffle 303 slides downward due to gravity, keeping the protective strip 307 at the bottom end of the second arc baffle 303 in contact with the outer wall of the side block 201, thereby blocking the gap between the column upper block 301 and the side block 201 to prevent gravel and dust from entering.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shield assembly for a shield machine, characterized in that: The invention comprises an inner shield assembly (1), wherein side block assemblies (2) are arranged on both sides of the inner shield assembly (1), and the two side block assemblies (2) are symmetrically arranged, an upper block assembly (3) is arranged on the top of the inner shield assembly (1), a connecting assembly (4) is arranged on the inner bottom of the side block assembly (2), and the side block assembly (2) is rotatably connected to the inner shield assembly (1) via the connecting assembly (4); The inner shield assembly (1) comprises 101 and an outer shield lower block (102), and the outer shield lower block (102) is located at the bottom of the inner shield body (101); The side block assembly (2) comprises a side block (201), and the bottom end of the side block (201) is fitted and connected to one end of the outer shield lower block (102); The upper block assembly (3) comprises an upper block (301), and two ends of the upper block (301) are respectively fitted and connected to the top ends of the side blocks (201); The connection assembly (4) comprises a straight rod (401), and both ends of the straight rod (401) are integrally formed with connection blocks (402).

2. A shield assembly for a shield machine according to claim 1, characterized in that: The inner side wall of the lower sub-block (102) of the outer shield is integrally formed with a plurality of connection blocks (103) distributed at equal intervals, and the top end of the connection block (103) is fixedly welded to the bottom end of the inner shield body (101).

3. A shield assembly for a shield machine according to claim 2, characterized in that: A first hydraulic rod (104) is fixedly installed at the middle of both sides of the inner shield body (101), and a sliding rod (105) is fixedly installed at the telescopic end of the first hydraulic rod (104).

4. A shield assembly for a shield machine according to claim 3, characterized in that: Both sides of the top of the inner shield body (101) are fixedly provided with convex plates (107), and the top of the convex plates (107) is provided with a plurality of limit grooves (108) distributed at equal intervals. A second hydraulic rod (106) is fixedly installed in the middle of the top of the inner shield body (101), and the telescopic end of the second hydraulic rod (106) is fixedly connected to the middle of the inner side wall of the upper block (301).

5. A shield assembly for a shield machine according to claim 4, characterized in that: An arc block (202) is integrally formed in the middle of the inner side wall of the side block (201), and a sliding groove (203) adapted to the sliding rod (105) is provided inside the arc block (202), and a connecting groove (204) is provided through the inner wall of the sliding groove (203) on one side close to the inner shield body (101).

6. A shield assembly for a shield machine according to claim 5, characterized in that: A plurality of mounting blocks (205) distributed at equal intervals are fixedly arranged at the bottom end of the inner wall of the side block (201), and a circular groove (206) is penetrated through one end of the front side of the mounting block (205) close to the inner shield body (101), and a first arc-shaped baffle plate (207) is arranged at the bottom end of the side block (201), and the first arc-shaped baffle plate (207) is located on the inner side of the outer shield lower block (102), and the top end of the first arc-shaped baffle plate (207) is fixedly welded to the bottom end of the mounting block (205).

7. A shield assembly for a shield machine according to claim 6, characterized in that: Both ends of the inner side wall of the upper block (301) are provided with arc grooves (302), and a second arc baffle (303) adapted to the arc groove (302) is movably provided inside the arc groove (302), and limiting sliding grooves (304) are provided on the front and back inner walls of the arc groove (302), and limiting sliding rods (306) are fixedly provided on the front and back ends of the second arc baffle (303) away from the side block (201), and the limiting sliding rods (306) are adapted to the limiting sliding grooves (304).

8. A shield assembly for a shield machine according to claim 7, characterized in that: A protective strip (307) is fixedly arranged at one end of the second arc-shaped baffle (303) close to the side block (201), and a plurality of limit rods (305) adapted to the limit grooves (108) are fixedly arranged on both sides of the middle portion of the inner side wall of the upper block (301), and the plurality of limit rods (305) correspond to the plurality of limit grooves (108) one by one.

9. A shield assembly for a shield machine according to claim 8, characterized in that: The bottom end of the connecting block (402) is fixedly welded to one end of the inner wall of the lower sub-block (102) of the outer shield, and an annular groove (403) corresponding to a plurality of mounting blocks (205) is formed on the straight rod (401), and the annular groove (403) is matched with the circular groove (206).

10. A shield assembly for a shield machine according to claim 9, characterized in that: Both ends of the upper block (301) are inclined, and both ends of the inner wall of the outer shield lower block (102) are rounded. The outer shield lower block (102), the upper block (301) and the two side blocks (201) form a circular ring.

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