Multi-marshalling deslagging system and shield tunneling machine

Abstract

The invention discloses a multi-marshalling deslagging system and a shield tunneling machine. The problems that in the prior art, a large-diameter earth pressure shield tunneling machine is low in deslagging efficiency, a belt conveyor is not flexible, and marshalling energy consumption is large are solved. The multi-marshalling deslagging system comprises a belt unit arranged on a trailer and N marshalling trains arranged side by side, N is larger than or equal to 2, the belt unit is located above the marshalling trains, and slag outlets of the belt unit correspond to the marshalling trains. According to the multi-marshalling deslagging system, the marshalling trains which are arranged side by side are matched with the belt conveyor, efficient loading and transportation of muck are achieved, the problem that the marshalling muck bearing capacity of a traditional single-row marshalling train of a large-diameter shield is insufficient is solved, and the deslagging efficiency is improved. And meanwhile, the movable belt conveyor is matched with front-back movement of the movable belt conveyor, the back-and-forth transportation time of marshalling trains in the tunnel is shortened, and deslagging is more environmentally friendly and more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a slag discharge system for a shield machine. Background Art

[0002] Due to its excellent excavation performance and excavation safety, shield machines are widely used in the field of tunnel construction. Earth pressure shield machines are important models of shield machines. During the excavation process, a large amount of slag will be excavated. The slag is generally transported to the marshaling by the rear supporting belt conveyor, and then transported out of the tunnel by the marshaling. Therefore, the transportation efficiency of the slag directly affects the tunnel excavation efficiency. At present, earth pressure shield machines generally use a single marshaling slag discharge method to transport slag, that is, a fixed belt conveyor cooperates with a mobile marshaling to complete the transfer and transportation of slag. The marshaling train gradually receives the slag dumped from the slag outlet of the belt conveyor until all the slag buckets are filled to complete the reception of a ring of slag, and finally the marshaling transports the slag out of the tunnel. The traditional single marshaling slag discharge method has a low slag discharge efficiency. When the slag discharge volume is large, the rear supporting and belt conveyor of the marshaling train need to be lengthened, which is costly; and the slag car needs to move continuously during the slag receiving process, which increases the emission of polluted gases in the tunnel.

[0003] In the prior art, for example, the patent with application number 202322686376.X discloses a slag transport and distribution mechanism suitable for large shield machines, which synchronously dumps slag into the marshaling train by setting up a slag distribution mechanism, but this mechanism is not suitable for slag discharge of large shield long marshaling. The patent with application number 202323503256.8 discloses a turnout device for improving shield construction efficiency in a narrow space, which optimizes and improves slag discharge efficiency by changing single turnout transportation to double turnout synchronous operation; however, this design is greatly restricted by the tunnel space and the slag discharge of a single marshaling train is small, and multiple round trips consume a lot of energy. The patent with application number 202110195255.8 discloses a telescopic shield machine slag discharge device, which adopts a curved arm telescopic structure, so that the belt conveyor can adapt to marshaling trains of different lengths and improve the shield excavation efficiency; however, the structure is complex, the reliability is low, and it cannot guarantee that the marshaling train reaches the maximum slag bearing capacity. Therefore, it is necessary to design a slag discharge method that can meet the requirements of large-diameter earth pressure shield with high efficiency, low energy consumption, simple structure and reliability. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a multi-group slag discharge system and a shield machine, which solves the problems of low slag discharge efficiency, inflexible belt conveyor and high group energy consumption of large-diameter earth pressure shield machines in the prior art.

[0005] The technical solution of the present invention is realized as follows: A multi-group slag discharging system includes a belt unit arranged on a trailer and N rows of grouped trains arranged side by side, where N≥2. The belt unit is located above the grouped trains, and the slag discharging port of the belt unit corresponds to the grouped trains. By using multi-row grouped trains in cooperation with the belt conveyor for slag discharging, the problem of insufficient slag承接 capacity of traditional grouping for large-diameter shield tunneling is solved.

[0006] Further preferably, the belt unit includes a fixed belt conveyor and a movable belt conveyor. The fixed belt conveyor is fixed on the upper part of the trailer, and the movable belt conveyor is located below the fixed belt conveyor and can move back and forth relative to the trailer. The slag and stones on the fixed belt conveyor can fall into the movable belt conveyor. The movable belt conveyor can move back and forth to achieve two-way and two-side slag discharging of the shield machine. The grouping can receive slag in a stationary state without frequently starting the engine, reducing the exhaust gas emissions in the tunnel.

[0007] As a preferred mode, one belt unit and two rows of grouped trains arranged side by side are provided on the trailer, forming a double-group slag discharging structure. The double-group slag discharging structure is the optimal mode, which also achieves the purpose of reducing the round-trip transportation time of grouping in the tunnel, and the slag discharging is more environmentally friendly and efficient.

[0008] Further preferably, two-way slag discharging hoppers are provided at both the front and rear ends of the movable belt conveyor. The two slag discharging ports of the two-way slag discharging hopper respectively correspond to the two rows of grouped trains arranged side by side; loading the grouped trains in pairs to improve the slag discharging efficiency.

[0009] Further preferably, when the movable belt conveyor rotates forward, slag is discharged through the two-way slag discharging hopper at the rear end; when the movable belt conveyor rotates backward, slag is discharged through the two-way slag discharging hopper at the front end. That is, the movable belt conveyor can discharge slag from both the front and rear ends, and at the same time, in cooperation with the forward and backward movement of the movable belt conveyor, when the grouped trains are in a stationary state, as many grouped trains as possible can be filled successively; reducing the number of starts of the grouped train engines and reducing the exhaust gas emissions in the tunnel.

[0010] Further preferably, the movable belt conveyor is arranged in the middle of the trailer through a movable frame, and the grouped trains are arranged below the trailer through a trailer hanging platform. Further preferably, the cross-section of the trailer hanging platform is a "U"-shaped structural surface, and the trailer hanging platform and the trailer form a closed-loop cavity structure; the grouped trains are located inside the closed-loop cavity structure and in the middle of the trailer hanging platform. That is, the trailer is enclosed, canceling the cumbersome operations of setting a passing platform and regularly moving the passing platform required for conventional grouping in the tunnel, and optimizing it into an integrated movable passing platform with the shield machine, reducing the situation where the equipment is lengthened due to the traditional tail passing platform. There is no relative movement between the trailer and the hanging platform during the slag receiving process, so there is no need to start frequently, reducing the exhaust gas emissions of diesel grouping in the tunnel, and relying on the movable belt conveyor to load the slag one by one.

[0011] Further preferably, the trailer undercarriage platform is provided with a guide rail that matches the train assembly; the trailer undercarriage platform is provided with a track at the bottom, and the track matches the sleeper arranged on the tunnel segment. Wherein, the trailer bottom is symmetrically provided with running wheels, and the running wheels move along the tunnel segment.

[0012] A shield machine comprises the multi-group slag discharge system.

[0013] The beneficial effects of the present invention are as follows: the multi-marshaling slag discharge system of the present invention adopts a combination of multiple rows of marshaling trains arranged side by side and belt conveyors to achieve efficient loading and transportation of slag, solve the problem of insufficient slag carrying capacity of traditional single-row marshaling trains in large-diameter shield tunnels, and improve slag discharge efficiency. In addition, the movable belt conveyor can discharge slag at the front and rear ends, and at the same time, cooperate with the front and rear movement of the movable belt conveyor to fill as many marshaling trains as possible in a stationary state; reduce the number of times the marshaling train engine is started, and reduce exhaust emissions in the tunnel. At the same time, the round-trip transportation time of the marshaling train in the tunnel is reduced, and the slag discharge is more environmentally friendly and more efficient.

[0014] Compared with the prior art, the large-diameter earth pressure shield machine with double-row slag discharge solves the problems of low slag discharge efficiency, high pollution, and complex operation caused by the inflexible belt conveyor, small slag transport capacity of single-row marshalling, and frequent start and stop of the marshalling, as well as the possible difficulty in lifting and installation of single-row trains. Therefore, on the basis of smooth slag discharge of the large-diameter earth pressure shield, the present invention maximizes the slag carrying capacity of the marshalling train, thereby improving the slag discharge efficiency and solving the pollution problem caused by frequent start-up of the marshalling; and the trailer adopts a closed structure, and there is no need to set up a conventional car-passing platform; the situation where the traditional tail car-passing platform causes the equipment to be lengthened is reduced; the construction cost is reduced and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the overall arrangement of the present invention.

[0017] Figure 2 It is a partial schematic diagram of the double-unit slag discharge structure of the present invention.

[0018] Figure 3 for Figure 2 AA view of the slag discharge structure of the middle double marshaling group. DETAILED DESCRIPTION

[0019] 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.

[0020] In the description of the present invention, it should be understood that the terms "vertical", "lateral", "up", "down", "front", "back", "left", "right", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, in Example 1, a multi-unit slag discharge system includes a belt unit 9 arranged on a trailer 5 and N rows of marshaling trains 4 arranged side by side, N≥2, and 4≥N≥2 under normal working conditions, so as to increase the slag discharge amount in one time. The belt conveyor is used to transport the slag excavated from the front end of the shield to the rear of the shield and the rear supporting trailer; the marshaling train receives the slag transported by the belt conveyor, and realizes the loading and transportation of the slag out of the tunnel. The traditional marshaling train is arranged in a single row, while this embodiment adopts a multi-row arrangement, which solves the problem of insufficient slag carrying capacity of traditional marshaling of large-diameter shields. Compared with the slag discharge of the tunnel belt conveyor, the tunnel construction cost can be greatly reduced. In this embodiment, the belt unit 9 is located above the marshaling train 4, and the slag outlet of the belt unit 9 corresponds to the marshaling train 4; it ensures that the slag on the belt conveyor can fall smoothly onto the marshaling train 4, so as to realize the rapid transportation of the slag.

[0023] The belt conveyor unit 9 in this embodiment includes a fixed belt conveyor 1 and a movable belt conveyor 2. The fixed belt conveyor 1 is fixed on the upper part of the trailer 5, and the movable belt conveyor 2 is located below the fixed belt conveyor 1 and can move forward and backward relative to the trailer 5. The slag on the fixed belt conveyor 1 falls into the movable belt conveyor 2. The fixed belt conveyor is used to transport the slag excavated at the front end of the shield to the rear of the shield; the movable belt conveyor undertakes the slag discharge at the front and rear ends of the belt conveyor through the forward and reverse rotation of the belt conveyor roller, and the belt conveyor can fill the remaining trains one after another by moving forward and backward, so as to achieve high-efficiency and low-energy slag discharge.

[0024] like Figure 2 As shown, embodiment 2 is a multi-unit slag discharge system. In this embodiment, a belt unit 9 and two trains 4 are arranged side by side on the trailer 5 to form a double-unit slag discharge structure. That is, N=2, and the two trains are arranged side by side. In this embodiment, the belt unit 9 is located above the two trains 4, and the two slag outlets of the belt unit 9 correspond to the upper and lower trains 4; it ensures that the slag on the belt machine can smoothly fall into the two trains 4 at the same time, realizing the rapid transportation of the slag.

[0025] Similarly, the belt conveyor unit 9 in this embodiment includes a fixed belt conveyor 1 and a movable belt conveyor 2. The fixed belt conveyor 1 is fixed on the upper part of the trailer 5, and the movable belt conveyor 2 is located below the fixed belt conveyor 1 and can move forward and backward relative to the trailer 5. The slag on the fixed belt conveyor 1 falls into the movable belt conveyor 2. The fixed belt conveyor is used to transport the slag excavated at the front end of the shield to the rear of the shield; the movable belt conveyor undertakes the slag discharge at the front and rear ends of the belt conveyor through the forward and reverse rotation of the belt conveyor roller, and the belt conveyor can fill the remaining trains one after another by moving forward and backward, so as to achieve high-efficiency and low-energy slag discharge.

[0026] In this embodiment, the movable belt conveyor 2 is provided with a two-way slag hopper 10 at both ends, and the two slag outlets of the two-way slag hopper 10 correspond to the two train sets 4 arranged side by side. That is, the two-way slag hopper 10 in this embodiment is provided with two slag outlets on the left and right, which just correspond to the two train sets arranged on the left and right, so as to realize the synchronous slag loading of the two train sets. When the movable belt conveyor 2 rotates forward, the slag is discharged through the two-way slag hopper 10 at the rear end; when the movable belt conveyor 2 rotates reversely, the slag is discharged through the two-way slag hopper 10 at the front end. The movable belt conveyor 2 is arranged in the middle of the trailer 5 through a movable frame 21, and the movable frame 21 can adopt a wheel frame to support the movable belt conveyor to move forward and backward along the trailer; or the movable frame adopts the form of a slide rail and a slide groove to realize sliding along the trailer. The movable belt conveyor can discharge slag at the front and rear ends, and at the same time, cooperate with the front and rear movement of the movable belt conveyor, and fill as many train sets as possible in succession when the train sets are stationary; reduce the number of engine starts of the train sets, and reduce exhaust emissions in the tunnel. At the same time, the round-trip transportation time of the train in the tunnel is reduced, and the slag discharge is more environmentally friendly and efficient.

[0027] As shown Figure 3 in the figure, in this embodiment, the formation train 4 is arranged under the trailer 5 through the trailer hanging platform 3. The trailer is used to place the hanging platform and other accessories; the trailer hanging platform enables a two-column formation layout side by side. Specifically, the cross-section of the trailer hanging platform 3 is a "U" - shaped structural surface, and the trailer hanging platform 3 and the trailer 5 form a closed-loop cavity structure; that is, the trailer hanging platform 3 and the trailer 5 adopt a closed structure, eliminating the need to set up a conventional passing platform. The problem of setting up a passing platform in the tunnel for conventional formations and regularly moving the passing platform is optimized into a mobile passing platform integrated with the shield machine. The formation train 4 is located within this closed-loop cavity structure and in the middle of the trailer hanging platform 3; to adapt to the slag discharge by the belt conveyor. The formation train 4 is arranged on the trailer 5 through the trailer hanging platform 3, providing a larger operation space for the double-column formation train and being structurally compact for the trailer.

[0028] In this embodiment, guide rails 12 matching the formation train 4 are provided on the trailer hanging platform 3, and the direction of the guide rails is parallel to the moving direction of the trailer, ensuring the stable movement of the formation train on the trailer. Tracks 6 are provided at the bottom of the trailer hanging platform 3, and the tracks 6 cooperate with the sleepers 7 arranged on the tunnel segments 8; the tracks are used for the movement of the trailer; the sleepers are used for installing turnout tracks. Symmetrically arranged walking wheels 11 are provided at the bottom of the trailer 5, and the walking wheels 11 move along the tunnel segments 8; ensuring the stable movement of the trailer along with the shield machine.

[0029] Embodiment 3, a shield machine, includes a multi-formation slag discharge system. The multi-formation slag discharge system includes a belt unit 9 arranged on the trailer 5 and two rows of formation trains 4 arranged side by side. The belt unit 9 and the two rows of formation trains 4 arranged side by side form a double-formation slag discharge structure. The two formation trains are arranged side by side left and right. In this embodiment, the belt unit 9 is located above the two formation trains 4, and the two slag discharge ports of the belt unit 9 correspond to the formation trains 4 one by one vertically; ensuring that the muck on the belt conveyor can smoothly fall into the two formation trains 4 simultaneously, realizing the rapid transfer of muck.

[0030] Similarly, in this embodiment, the belt conveyor unit 9 includes a fixed belt conveyor 1 and a movable belt conveyor 2. The fixed belt conveyor 1 is fixed on the upper part of the trailer 5. The movable belt conveyor 2 is located below the fixed belt conveyor 1 and can move back and forth relative to the trailer 5. The slag and stones on the fixed belt conveyor 1 can fall into the movable belt conveyor 2. The fixed belt conveyor is used to transport the muck excavated at the front end of the shield to the rear of the shield. The movable belt conveyor undertakes the slag discharge at the front and rear ends of the belt conveyor through the forward and reverse rotation of the belt conveyor roller. At the same time, the belt conveyor can be successively filled with the remaining formation trains by moving back and forth, realizing high-efficiency and low-energy-consumption slag discharge. The fixed belt conveyor is fixedly installed in the shield machine. The movable belt conveyor is located below the fixed belt conveyor and is installed on the belt conveyor track of the trailer. By sliding along the track, it can flexibly discharge slag to each formation train. The slag discharge ports of the fixed belt conveyor and the movable belt conveyor are located above the formation train. Two slag discharge ports are arranged at one end of the movable belt conveyor, corresponding to two formation trains on the hanging platform under the same group of trailers respectively.

[0031] In this embodiment, two-way slag discharge hoppers 10 are provided at both the front and rear ends of the movable belt conveyor 2. The two slag discharge ports of the two-way slag discharge hopper 10 respectively correspond to two formation trains 4 arranged side by side. That is, there are two slag discharge ports on the left and right of the two-way slag discharge hopper 10 in this embodiment, exactly corresponding to the two formation trains arranged on the left and right, realizing the synchronous slag loading of the two formation trains. When the movable belt conveyor 2 rotates forward, it discharges slag through the two-way slag discharge hopper 10 at the rear end. When the movable belt conveyor 2 rotates reversely, it discharges slag through the two-way slag discharge hopper 10 at the front end. The movable belt conveyor 2 is arranged in the middle of the trailer 5 through a moving frame 21. The moving frame 21 can adopt a wheeled frame to support the forward and backward movement of the movable belt conveyor along the trailer. The movable belt conveyor can discharge slag at both the front and rear ends. At the same time, in cooperation with the forward and backward movement of the movable belt conveyor, when the formation train is stationary, as many formation trains as possible can be successively filled; the number of starts of the formation train engine is reduced, and the exhaust gas emission in the tunnel is reduced. At the same time, the round-trip transportation time of the formation train in the tunnel is reduced, and the slag discharge is more environmentally friendly and efficient.

[0032] In this embodiment, the formation train 4 is arranged under the trailer 5 through the hanging platform 3 under the trailer. The trailer is used to place the hanging platform and other accessories. The hanging platform under the trailer realizes the arrangement of two rows of formations side by side. Specifically, the cross-section of the hanging platform 3 under the trailer is a "U"-shaped structural surface, and the hanging platform 3 under the trailer and the trailer 5 form a closed-loop cavity structure. That is, the hanging platform 3 under the trailer and the trailer 5 adopt a closed structure, and there is no need to set a conventional passing platform. The problem of setting a passing platform in the tunnel for conventional formations and regularly moving the passing platform is solved, and it is optimized into a movable passing platform integrated with the shield machine. The formation train 4 is located in this closed-loop cavity structure and in the middle of the hanging platform 3 under the trailer to adapt to the slag discharge of the belt conveyor. The formation train 4 is arranged on the trailer 5 through the hanging platform 3 under the trailer, providing a larger operating space for the double-row formation train and being structurally compact for the trailer.

[0033] In this embodiment, the trailer undercarriage platform 3 is provided with a guide rail 12 that matches the train set 4. The direction of the guide rail is parallel to the moving direction of the trailer, ensuring the stable movement of the train set on the trailer. The bottom of the trailer undercarriage platform 3 is provided with a track 6, which matches the sleeper 7 set on the tunnel segment 8; the track is used for the movement of the trailer; the sleeper is used to install the turnout track. The bottom of the trailer 5 is symmetrically provided with running wheels 11, which move along the tunnel segment 8; ensuring the stable movement of the trailer with the shield machine.

[0034] Compared with the existing technology, the large-diameter earth pressure shield machine with double-unit slag discharge solves the problems of low slag discharge efficiency, high pollution, and complex operation caused by the inflexible belt conveyor, small slag transport capacity of single-unit, and frequent start-stop of the unit, as well as the possible difficulty in lifting and installation of single-unit trains. Therefore, this solution maximizes the slag carrying capacity of the train on the basis of the smooth slag discharge of the large-diameter earth pressure shield, thereby improving the slag discharge efficiency and solving the pollution problem caused by the frequent start-up of the unit. This invention is not limited to earth pressure shield machines, but is applicable to all shield machines that use belt conveyors and unit slag discharge.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-unit slag removal system, characterized by: It includes a belt unit (9) arranged on a trailer (5) and N rows of marshaling trains (4) arranged side by side, where N≥2. The belt unit (9) is located above the marshaling trains (4), and the slag discharge port of the belt unit (9) corresponds to the marshaling trains (4).

2. The multi-unit slag removal system according to claim 1, characterized in that: The belt unit (9) includes a fixed belt conveyor (1) and a movable belt conveyor (2). The fixed belt conveyor (1) is fixed on the upper part of the trailer (5), and the movable belt conveyor (2) is located below the fixed belt conveyor (1) and can move back and forth relative to the trailer (5). The slag and stones on the fixed belt conveyor (1) fall into the movable belt conveyor (2).

3. The multi-unit slag removal system according to claim 2, characterized in that: One belt unit (9) and two rows of marshaling trains (4) arranged side by side are provided on the trailer (5), forming a double-marshaling slag discharge structure.

4. The multi-unit slag removal system according to claim 3, characterized in that: Bidirectional slag discharge hoppers (10) are provided at both the front and rear ends of the movable belt conveyor (2), and the two slag discharge ports of the bidirectional slag discharge hoppers (10) respectively correspond to the two rows of marshaling trains (4) arranged side by side.

5. The multi-unit slag removal system according to claim 4, characterized in that: When the movable belt conveyor (2) rotates forward, slag is discharged through the bidirectional slag discharge hopper (10) at the rear end; when the movable belt conveyor (2) rotates backward, slag is discharged through the bidirectional slag discharge hopper (10) at the front end.

6. The multi-unit slag removal system according to any one of claims 3 to 5, characterized in that: The movable belt conveyor (2) is arranged in the middle of the trailer (5) through a moving frame (21), and the marshaling trains (4) are arranged below the trailer (5) through a trailer hanging platform (3).

7. The multi-unit slag removal system according to claim 6, characterized in that: The cross-section of the trailer hanging platform (3) is a "U"-shaped structural surface, and the trailer hanging platform (3) and the trailer (5) form a closed-loop cavity structure; the marshaling trains (4) are located within this closed-loop cavity structure and in the middle of the trailer hanging platform (3).

8. The multi-unit slag removal system according to claim 7, characterized in that: Guide rails (12) matching the marshaling trains (4) are provided on the trailer hanging platform (3); tracks (6) are provided at the bottom of the trailer hanging platform (3), and the tracks (6) cooperate with sleepers (7) arranged on tunnel segments (8).

9. The multi-unit slag removal system according to claim 1 or 8, characterized in that: Walking wheels (11) are symmetrically provided at the bottom of the trailer (5), and the walking wheels (11) move along the tunnel segments (8).

10. A shield machine, characterized in that: It includes a multi-marshaling slag discharge system according to any one of claims 1 to 9.

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