A buffer structure for shield propulsion system

Abstract

The present invention belongs to the field of shield propulsion technology, and discloses a buffer structure of a shield propulsion system, which is installed between a shield machine partition and a propulsion cylinder, a connecting block is installed on the propulsion cylinder, and a positioning plate is detachably connected to the connecting block; a fixed plate is detachably connected to the shield machine partition on one side of the positioning plate, and a first buffer assembly is connected between the fixed plate and the positioning plate, for buffering the propulsion cylinder that swings left and right through the first buffer assembly; a second buffer assembly is installed on the side of the fixed plate away from the positioning plate, for buffering the propulsion cylinder that swings left and right through the second buffer assembly. The present invention can achieve fast loading and unloading, and if the propulsion cylinder swings, the first buffer assembly and the second buffer assembly can both have a buffering effect on the left and right swing of the propulsion cylinder, and the buffering effects of the first buffer assembly and the second buffer assembly are synchronously superimposed, which can more effectively maintain the stability of the propulsion cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of shield propulsion, and in particular relates to a buffer structure of a shield propulsion system. Background Art

[0002] A shield machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine constructs the tunnel's supporting segments while excavating. It is different from the open construction method. The shield machine's propulsion system is realized by a hydraulic system controlling multiple cylinders.

[0003] However, the existing multiple propulsion cylinders have poor protection against external media, making it very laborious to work in harder rock formations. They generate large vibrations during propulsion and lack the ability to stabilize and adjust themselves. The buffering effect is poor, which can easily cause multiple propulsion cylinders to shake, reducing their service life or causing damage. This makes it difficult for the shield machine to perform excavation and propulsion work, and it is difficult to meet the propulsion needs of subsequent shield machines. To this end, we proposed a shield machine propulsion system.

[0004] In response to the above problems, the utility model patent with authorization announcement number CN211874493U discloses a shield machine propulsion system, including a shield machine partition and two propulsion cylinders, wherein an articulated block is installed on the propulsion cylinder, and a fixed block is integrally formed on the side wall of the articulated block. The propulsion cylinder is installed in the shield machine partition, and a protective sleeve is provided between the propulsion cylinders. A connecting rod is fixedly installed on the outer wall of the protective sleeve, and the other end of the connecting rod is fixedly connected to the shield machine partition. A cylinder body is installed in the protective sleeve. A piston is movably connected to the inner cavity of the cylinder body. A straight rod is fixedly mounted on the outer wall of the side of the piston near the fixed block. The end of the straight rod is sleeved with an inner shell, and a baffle is fixedly mounted on the end of the straight rod in the inner cavity of the inner shell. A second buffer spring is fixedly mounted on the side wall of the baffle. The other end of the second buffer spring is fixedly connected to the inner cavity side wall of the inner shell. A sealing block is fixedly mounted on the outer wall of the side of the fixed block near the inner shell. The sealing block is mounted on the end of the cylinder body, and the inner shell is mounted inside the sealing block. The main method is to maintain the stability of the propulsion cylinder by utilizing the air pressure inside the cylinder and the spring force of the spring. However, in practice, when the piston slides in the air pressure, it needs to slide a certain distance before it can maintain relative stability. Combined with the elastic force of the spring, it can be said that when the propulsion cylinder shakes in one direction, although it can play a buffering role, the initial shaking is still violent and the buffering effect is not good. Based on this, it is necessary to further improve it. Summary of the Invention

[0005] The purpose of the present invention is to provide a buffer structure for a shield propulsion system to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A buffer structure of a shield propulsion system is installed between a shield machine partition and a propulsion cylinder. A connecting block is installed on the propulsion cylinder, and a positioning plate is detachably connected to the connecting block. A fixed plate is detachably connected to the shield machine partition on one side of the positioning plate, and a first buffer assembly is connected between the fixed plate and the positioning plate to buffer the left and right swinging propulsion cylinder through the first buffer assembly. A second buffer assembly is installed on the side of the fixed plate away from the positioning plate to buffer the left and right swinging propulsion cylinder through the second buffer assembly.

[0008] As a preferred technical solution in the present invention, the first buffer assembly includes a first sleeve, a first sleeve cover and multiple first springs, the first sleeve is connected to the fixed plate, the first sleeve cover is connected to the positioning plate, the first sleeve cover is sleeved on the outside of the first sleeve and is slidably connected to the first sleeve; the first springs are evenly distributed and connected between the first sleeve and the first sleeve cover.

[0009] As a preferred technical solution in the present invention, the first buffer assembly also includes a first mounting ring, one end of all first springs is connected to the first mounting ring, and the first mounting ring is arranged on the inner bottom surface of the first sleeve; a T-shaped limit portion is provided at the bottom of the first sleeve, and a T-shaped slide groove is provided on the other side of the fixed plate, and the T-shaped limit portion slides in the T-shaped slide groove.

[0010] As a preferred technical solution in the present invention, the first buffer assembly also includes a hollow sleeve, one end of the hollow sleeve is threadedly connected to the first cylinder cover, and the other end of the hollow sleeve passes through the first mounting ring, the first sleeve and the fixing plate in sequence and is elastically supported on the second buffer assembly.

[0011] As a preferred technical solution in the present invention, the second buffer assembly includes a second sleeve, a second sleeve cover, a piston ring, a first slide and multiple second springs. The second sleeve is detachably connected to one side of the fixed plate, the second sleeve cover is threadedly connected to the second sleeve, the piston ring is arranged on the inner bottom surface of the second sleeve and is slidably connected to the second sleeve, the first slide is arranged at the outlet of the second sleeve and is slidably connected to the second sleeve, all the second springs are evenly distributed between the first slide and the piston ring, and the first slide is fixedly connected to the side of the positioning plate facing the first slide. The end of the connecting rod away from the first slide passes through the piston ring, the fixed plate, the first buffer assembly and the positioning plate in sequence, and one end of the connecting rod is provided with a small threaded rod that is gap-matched with the positioning plate, and a locking nut is threaded on the small threaded rod; the hollow sleeve is sleeved on the outside of the connecting rod and connected to the piston ring.

[0012] As a preferred technical solution in the present invention, the side of the piston ring close to the first slide is connected to a sliding ring, the sliding ring is sleeved on the outside of the connecting rod, and the sliding ring is slidably connected to the second sleeve; all the second springs are evenly distributed between the first slide and the sliding ring.

[0013] As a preferred technical solution in the present invention, a first piston is provided on the other side of the first slide, the first piston is slidably connected to the second sleeve, and the second sleeve cover is provided with an adjustment component for adjusting the position of the first piston in the second sleeve.

[0014] As a preferred technical solution in the present invention, the adjusting assembly includes an adjusting screw and a fixing nut fixedly connected to the outside of the second cylinder cover, the adjusting screw is threadedly connected to the fixing nut, and one end of the adjusting screw passes through the second sleeve and is rotatably connected to the first piston through a bearing.

[0015] As a preferred technical solution in the present invention, a U-shaped groove is provided on the upper part of the connecting block, the lower part of the positioning plate is slidably connected in the U-shaped groove, and the lower part of the positioning plate is connected to the upper part of the connecting block by bolts.

[0016] As a preferred technical solution in the present invention, two parallel limit plates are connected to the shield machine partition corresponding to each fixed plate, the upper part of the fixed plate is slidably connected between the two limit plates, and the fixed plate and the two limit plates are connected by bolts.

[0017] Beneficial effects: The present invention can first assemble the entire buffer structure, and then realize rapid loading and unloading between the shield machine partition and the propulsion cylinder, which is simple and convenient. During the operation of the shield propulsion system, if the propulsion cylinder shakes, the connecting block and the positioning plate will shake synchronously. At this time, the first buffer assembly and the second buffer assembly can both have a buffering effect on the left and right shaking of the propulsion cylinder. The buffering effects of the first buffer assembly and the second buffer assembly are synchronously superimposed, which can more effectively maintain the stability of the propulsion cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a partial structural diagram of the present invention.

[0020] In the figure: 1-shield machine partition; 2-thrust cylinder; 3-connecting block; 4-positioning plate; 5-fixing plate; 6-first sleeve; 7-first cylinder cover; 8-first spring; 9-first mounting ring; 10-hollow sleeve; 11-second sleeve; 12-second cylinder cover; 13-piston ring; 14-first slide plate; 15-second spring; 16-connecting rod; 17-locking nut; 18-sliding ring; 19-first piston; 20-adjusting screw; 21-fixing nut; 22-limiting plate. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0022] Example:

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides a buffer structure for a shield propulsion system, which is installed between the shield machine partition 1 and the propulsion cylinder 2. A connecting block 3 is installed on the propulsion cylinder 2, and a positioning plate 4 is detachably connected to the connecting block 3; a fixing plate 5 is detachably connected to the shield machine partition 1 on one side of the positioning plate 4, and a first buffer assembly is connected between the fixing plate 5 and the positioning plate 4, which is used to buffer the propulsion cylinder 2 that swings left and right through the first buffer assembly; a second buffer assembly is installed on the side of the fixing plate 5 away from the positioning plate 4, which is used to buffer the propulsion cylinder 2 that swings left and right through the second buffer assembly. In practice, the positioning plate 4, the first buffer assembly, the fixing plate 5, and the second buffer assembly can be combined together first, and then the positioning plate 4 can be connected to the connecting block 3, and the fixing plate 5 can be connected to the shield machine partition 1 to achieve rapid installation of the entire buffer structure. During the operation of the shield propulsion system, if the propulsion cylinder 2 shakes, the connecting block 3 and the positioning plate 4 will shake synchronously. At this time, the first buffer assembly and the second buffer assembly can both buffer the left and right shaking of the propulsion cylinder 2. The buffering effects of the first buffer assembly and the second buffer assembly are superimposed synchronously, which can more effectively maintain the stability of the propulsion cylinder 2.

[0024] The present invention can first assemble the entire buffer structure, and then realize quick loading and unloading between the shield machine partition 1 and the propulsion cylinder 2, which is simple and convenient. During the operation of the shield propulsion system, if the propulsion cylinder 2 shakes, the connecting block 3 and the positioning plate 4 will shake synchronously. At this time, the first buffer assembly and the second buffer assembly can both have a buffering effect on the left and right shaking of the propulsion cylinder 2. The buffering effects of the first buffer assembly and the second buffer assembly are synchronously superimposed, which can more effectively maintain the stability of the propulsion cylinder 2.

[0025] As a preferred implementation scheme in this embodiment, it needs to be further explained that the first buffer assembly includes a first sleeve 6, a first cylinder cover 7 and multiple first springs 8, the first sleeve 6 is connected to the fixed plate 5, the first cylinder cover 7 is connected to the positioning plate 4, the first cylinder cover 7 is sleeved on the outside of the first sleeve 6 and is slidingly connected to the first sleeve 6; the first springs 8 are evenly distributed and connected between the first sleeve 6 and the first cylinder cover 7, and then if the propulsion cylinder 2 swings toward the fixed plate 5, the positioning plate 4 will drive the first cylinder cover 7 to compress the first spring 8, and the first spring 8 can generate a buffer force, and if the propulsion cylinder 2 swings away from the fixed plate 5, the positioning plate 4 will drive the first cylinder cover 7 to stretch the first spring 8, which can also generate a buffer force.

[0026] As a preferred implementation scheme in this embodiment, it needs to be further explained that the first buffer assembly also includes a first mounting ring 9, one end of all first springs 8 are connected to the first mounting ring 9, the first mounting ring 9 is arranged on the inner bottom surface of the first sleeve 6, and the first mounting ring 9 is matched with the inner wall damping of the first sleeve 6, that is, when the first mounting ring 9 slides in the first sleeve 6, there is friction between the first mounting ring 9 and the inner wall of the first sleeve 6, which will prevent the sliding of the first mounting ring 9, and then produce a buffering effect through the first spring 8; a T-shaped limit portion is provided at the bottom of the first sleeve 6, and a T-shaped groove is provided on the other side of the fixed plate 5, and the T-shaped limit portion is matched and slid in the T-shaped groove, so that the first sleeve 6 can be quickly loaded and unloaded on the fixed plate 5.

[0027] As a preferred implementation scheme in this embodiment, it needs to be further explained that the first buffer assembly also includes a hollow sleeve 10, one end of the hollow sleeve 10 is threadedly connected to the first cylinder cover 7, and the other end of the hollow sleeve 10 passes through the first mounting ring 9, the first sleeve 6 and the fixed plate 5 in sequence and is elastically supported on the second buffer assembly. When the thrust cylinder 2 swings toward the fixed plate 5, the positioning plate 4 will drive the first cylinder cover 7 to press the hollow sleeve 10, so that the hollow sleeve 10 presses the second buffer assembly, and the second buffer assembly has a buffering effect on the shaking of the thrust cylinder 2.

[0028] As a preferred implementation scheme in this embodiment, it needs to be further explained that the second buffer assembly includes a second sleeve 11, a second sleeve cover 12, a piston ring 13, a first slide plate 14 and a plurality of second springs 15. The second sleeve 11 is detachably connected to one side of the fixed plate 5. Figure 1 and Figure 2 As shown, a detachable connection can be achieved by bolts, and the second cylinder cover 12 is threadedly connected to the second sleeve 11 to ensure stability. The piston ring 13 is arranged on the inner bottom surface of the second sleeve 11 and is slidably connected to the second sleeve 11. The first slide 14 is arranged at the outlet of the second sleeve 11 and is slidably connected to the second sleeve 11. All second springs 15 are evenly distributed between the first slide 14 and the piston ring 13, thereby achieving an elastic connection between the first slide 14 and the piston ring 13. The first slide 14 is fixedly connected to the side of the positioning plate 4 with a connecting rod 16, and the end of the connecting rod 16 away from the first slide 14 passes through the piston ring 13, the fixing plate 5, the first buffer assembly and the positioning plate 4 in sequence, and the connecting rod 16 One end is provided with a small threaded rod that is clearance-matched with the positioning plate 4, and a locking nut 17 is threadedly connected to the small threaded rod. In this way, when the propulsion cylinder 2 swings in the direction away from the fixed plate 5, the positioning plate 4 will drive the locking nut 17 to pull the connecting rod 16 to swing together, and the connecting rod 16 will drive the first slide plate 14 to compress the second spring 15, thereby generating a buffer force; the hollow sleeve 10 is sleeved on the outside of the connecting rod 16 and connected to the piston ring 13, and then when the propulsion cylinder 2 swings in the direction of the fixed plate 5, the positioning plate 4 will drive the first cylinder cover 7 to compress the hollow sleeve 10, so that the hollow sleeve 10 compresses the piston ring 13, and then the piston ring 13 compresses the second spring 15, thereby generating a buffer force.

[0029] As a preferred implementation scheme in this embodiment, it needs to be further explained that the piston ring 13 is connected to a sliding ring 18 on the side close to the first slide 14, the sliding ring 18 is sleeved on the outside of the connecting rod 16, and the sliding ring 18 is slidably connected to the second sleeve 11, ensuring the flexibility of the sliding ring 18 and the stability of the piston ring 13, thereby avoiding deformation of the piston ring 13; all the second springs 15 are evenly distributed between the first slide 14 and the sliding ring 18, thereby avoiding the second springs 15 from compressing the piston ring 13 and causing deformation of the piston ring 13.

[0030] As a preferred implementation scheme in this embodiment, it needs to be further explained that a first piston 19 is provided on the other side of the first slide plate 14, thereby forming a similar sleeve structure between the second sleeve 11 and the second cylinder cover 12. This function can also generate air pressure inside, thereby reducing the elastic force of the second spring 15 relatively, thereby reducing the shaking amplitude of the propulsion cylinder 2, and allowing the propulsion cylinder 2 to recover stability more quickly. The first piston 19 is slidably connected to the second sleeve 11, and the second cylinder cover 12 is provided with an adjustment component for adjusting the position of the first piston 19 in the second sleeve 11. By adjusting the adjustment component, the position of the first piston 19 can be changed, and the elastic force of the second spring 15 can be adjusted according to actual conditions.

[0031] As a preferred implementation scheme in this embodiment, it needs to be further explained that the adjustment assembly includes an adjusting screw 20 and a fixing nut 21 fixedly connected to the outside of the second cylinder cover 12. The adjusting screw 20 is threadedly connected to the fixing nut 21, and one end of the adjusting screw 20 passes through the second sleeve 11 and is rotatably connected to the first piston 19 through a bearing. The adjustment is simple and convenient. It should be noted that, preferably, a handwheel is provided at the other end of the adjusting screw 20, or a wrench adjustment hole is provided at the other end of the adjusting screw 20, so that it is easier to adjust the adjusting screw 20.

[0032] As a preferred implementation scheme in this embodiment, it needs to be further explained that a U-shaped groove is provided on the upper part of the connecting block 3, the lower part of the positioning plate 4 is slidably connected to the U-shaped groove, and the lower part of the positioning plate 4 is connected to the upper part of the connecting block 3 by bolts, which ensures the stability of the structure and is simple and convenient to load and unload.

[0033] As a preferred implementation scheme in this embodiment, it needs to be further explained that two parallel limiting plates 22 are connected to the shield machine partition 1 corresponding to each fixed plate 5, the upper part of the fixed plate 5 is slidably connected between the two limiting plates 22, and the fixed plate 5 and the two limiting plates 22 are connected by bolts, which ensures the stability of the structure and is simple and convenient to load and unload.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A buffer structure of a shield propulsion system, installed between a shield machine diaphragm (1) and a propulsion cylinder (2), characterized in that: A connecting block (3) is installed on the propulsion oil cylinder (2), and a positioning plate (4) is detachably connected to the connecting block (3); a fixing plate (5) is detachably connected to the shield machine partition (1) on one side of the positioning plate (4), and a first buffer assembly is connected between the fixing plate (5) and the positioning plate (4), for buffering the propulsion oil cylinder (2) that swings left and right through the first buffer assembly; a second buffer assembly is installed on the side of the fixing plate (5) away from the positioning plate (4), for buffering the propulsion oil cylinder (2) that swings left and right through the second buffer assembly; the first buffer assembly includes a first sleeve (6), a first sleeve cover (7) and a plurality of first springs (8), the first sleeve (6) is connected to the fixing plate (5), the first sleeve cover (7) is connected to the positioning plate (4), and the first sleeve cover (7) is sleeved on the outside of the first sleeve (6). and is slidably connected to the first sleeve (6); the first springs (8) are evenly distributed and connected between the first sleeve (6) and the first cylinder cover (7); the first buffer assembly also includes a first mounting ring (9), one end of all the first springs (8) is connected to the first mounting ring (9), and the first mounting ring (9) is arranged on the inner bottom surface of the first sleeve (6); a T-shaped limiting portion is provided at the bottom of the first sleeve (6), and a T-shaped sliding groove is provided on the other side of the fixing plate (5), and the T-shaped limiting portion is matched and slid in the T-shaped sliding groove; the first buffer assembly also includes a hollow sleeve (10), one end of the hollow sleeve (10) is threadedly connected to the first cylinder cover (7), and the other end of the hollow sleeve (10) passes through the first mounting ring (9), the first sleeve (6) and the fixing plate (5) in sequence and is elastically supported on the second buffer assembly.

2. The buffer structure of a shield propulsion system according to claim 1, characterized in that: The second buffer assembly includes a second sleeve (11), a second sleeve cover (12), a piston ring (13), a first slide plate (14) and a plurality of second springs (15). The second sleeve (11) is detachably connected to one side of the fixing plate (5). The second sleeve cover (12) is threadedly connected to the second sleeve (11). The piston ring (13) is arranged on the inner bottom surface of the second sleeve (11) and is slidably connected to the second sleeve (11). The first slide plate (14) is arranged at the outlet of the second sleeve (11) and is slidably connected to the second sleeve (11). All the second springs (15) are evenly spaced. Distributed between the first slide plate (14) and the piston ring (13), the first slide plate (14) is fixedly connected to a connecting rod (16) on the side facing the positioning plate (4), and the end of the connecting rod (16) away from the first slide plate (14) passes through the piston ring (13), the fixed plate (5), the first buffer assembly and the positioning plate (4) in sequence, and one end of the connecting rod (16) is provided with a small threaded rod that is clearance-matched with the positioning plate (4), and a locking nut (17) is threadedly connected to the small threaded rod; the hollow sleeve (10) is sleeved on the outside of the connecting rod (16) and connected to the piston ring (13).

3. The buffer structure of a shield propulsion system according to claim 2, characterized in that: A sliding ring (18) is connected to one side of the piston ring (13) close to the first slide plate (14). The sliding ring (18) is sleeved on the outside of the connecting rod (16) and is slidably connected to the inside of the second sleeve (11). All the second springs (15) are evenly distributed between the first slide plate (14) and the sliding ring (18).

4. A buffer structure of a shield propulsion system according to claim 2 or 3, characterized in that: A first piston (19) is provided on the other side of the first slide plate (14). The first piston (19) is slidably connected to the second sleeve (11). The second sleeve cover (12) is provided with an adjustment component for adjusting the position of the first piston (19) in the second sleeve (11).

5. The buffer structure of a shield propulsion system according to claim 4, characterized in that: The adjusting assembly comprises an adjusting screw (20) and a fixing nut (21) fixedly connected to the outside of the second cylinder cover (12), the adjusting screw (20) and the fixing nut (21) being threadedly connected, and one end of the adjusting screw (20) passes through the second sleeve (11) and is rotatably connected to the first piston (19) through a bearing.

6. The buffer structure of a shield propulsion system according to claim 1, characterized in that: A U-shaped groove is provided on the upper portion of the connecting block (3), the lower portion of the positioning plate (4) is slidably connected in the U-shaped groove, and the lower portion of the positioning plate (4) is connected to the upper portion of the connecting block (3) via bolts.

7. The buffer structure of a shield propulsion system according to claim 1, characterized in that: Two mutually parallel limiting plates (22) are connected to the shield machine partition (1) corresponding to each fixed plate (5), the upper part of the fixed plate (5) is slidably connected between the two limiting plates (22), and the fixed plate (5) and the two limiting plates (22) are connected by bolts.

Images