Slag quantity control device for slag inlet of TBM (Tunnel Boring Machine) cutterhead

Abstract

The utility model discloses a slag quantity control device for slag inlets of a TBM cutter head. The slag quantity control device comprises two overturning plates arranged in each slag inlet, a spring base is arranged below each overturning plate, a spring groove is formed in each spring base, a compression spring is arranged in each spring groove, and the other end of each compression spring abuts against the bottom of the corresponding overturning plate. A reinforcing connecting support plate is arranged between the spring base and the inner wall of the slag inlet cavity; and the two turnover plates are butted to form a circle and block the lower part of the slag inlet. According to the utility model, the buffer turnover plate structure is arranged at the slag inlet of the cutter head, so that continuous slag feeding is effectively controlled, and a large amount of silt is prevented from rushing in.

Description

Technical Field

[0001] The utility model belongs to the technical field of large-scale construction equipment, and in particular relates to a slag quantity control device for a slag inlet of a TBM cutter head. Background Art

[0002] Tunnel Boring Machine (TBM) is a professional equipment used to dig tunnels, which is highly automated and intelligent.

[0003] The tunnel boring machine is mainly composed of the following parts: Cutter working mechanism: used to cut rock formations, it is the main working part of the tunnel boring machine. Bucket wheel loading mechanism: responsible for loading the cut rock or soil onto the conveyor belt. Hydraulic support and propulsion mechanism: using hydraulic cylinders to provide support and propulsion force, so that the tunnel boring machine can move forward. Continuous transfer mechanism: the loaded rock or soil is continuously transported out of the tunnel through the conveyor belt. Power transmission mechanism: provides power for the tunnel boring machine and drives the movement of each part.

[0004] In the prior art, unlike shield machines used for soft soil layers, tunnel boring machines are mainly used for excavation in rock layers. TBM construction methods are generally suitable for rock geological tunnels with low water content and relatively stable rock layers. However, the stratum structure is complex, and it is inevitable that there will be water-rich altered rock layers or water-rich broken zone rock layers. Such strata have poor stability and high water content, and will cause water, mud and sand to surge. The slag inlet of the TBM cutterhead is generally an open structure, and the gushing water and sand can be directly connected to the slag conveyor belt through the slag inlet. A large amount of mud and sand influx can easily cause damage to the equipment. Utility Model Content

[0005] The utility model aims to solve the above problems in the existing technology and proposes a slag amount control device for a TBM cutter head slag inlet. By arranging a buffer flip plate structure at the slag inlet of the cutter head, the continuous slag feeding is effectively controlled to avoid a large influx of mud and sand.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is specifically as follows:

[0007] A slag amount control device for a TBM cutter head slag inlet comprises two flip plates respectively arranged in each slag inlet, a spring base is arranged under each flip plate, a spring groove is arranged in the spring base, a compression spring is arranged in the spring groove, and the other end of the compression spring is against the bottom of the flip plate; a reinforcing connecting support plate is arranged between the spring base and the inner wall of the slag inlet chamber; the two flip plates are connected to form a circle and are sealed under the slag inlet.

[0008] Furthermore, the turnover plate is semicircular and is rotatably connected to the edge of the slag inlet through a plurality of hinges.

[0009] Furthermore, the reinforced connecting support plate is L-shaped, including a long plate and a short plate, and the long plate is connected to the bottom of the spring base.

[0010] Furthermore, the short plate is fixed to the inner wall of the slag inlet chamber by bolts.

[0011] Furthermore, a connection hole for a disassembly plate is provided below the bottom of each spring base.

[0012] Furthermore, a disassembly plate is connected between the spring bases.

[0013] Compared with the prior art, the utility model has the following advantages: the utility model sets a flip plate at the slag inlet of the traditional tunnel boring machine, and sets a compression spring between the flip plate and the inner wall of the slag inlet chamber. When the solid rock formation is excavated, the crushed stones are heavy. When the cutter head rotates to a high position, the stones in the slag inlet compress the spring due to their own weight and rotate the flip plate, and then fall onto the conveyor belt through the slag inlet chamber. In water-rich rock formations, when water and sand surge, when it is in a low position, the flip plate can play a certain sealing effect to prevent a large amount of water and sand from pouring in. When it is in a high position, the weight of the water and sand is not as good as that of the stones, and the flip plate can also play a certain blocking role under the action of the compression spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The structure diagram of the slag quantity control device for the TBM cutter head slag inlet provided by the utility model Figure 1 ;

[0016] Figure 2 The structure diagram of the slag quantity control device for the TBM cutter head slag inlet provided by the utility model Figure 2 .

[0017] Figure numerals: 1. slag inlet; 2. spring base; 3. connecting hole; 4. compression spring; 5. strengthening connecting support plate; 6. flip plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0021] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. 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 present invention can be understood according to specific circumstances.

[0024] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0025] like Figure 1-Figure 2As shown, a slag amount control device for a TBM cutter head slag inlet comprises two flip plates 6 respectively arranged in each slag inlet 1, and a spring base 2 is arranged under each flip plate 6, and a spring groove is arranged in the spring base 2, and a compression spring 4 is arranged in the spring groove, and the other end of the compression spring 4 is against the bottom of the flip plate 6; a reinforcing connecting support plate 5 is arranged between the spring base 2 and the inner wall of the slag inlet chamber; the two flip plates 6 are connected to form a circle and are sealed under the slag inlet 1.

[0026] Compared with the prior art, in the prior art, TBM is also called a full-face open-type hard rock tunnel boring machine, with dozens of cutters on its cutter disc, and the cutting head is close to the tunnel surface, generating huge contact pressure with the rock surface during rotation, thereby cutting the rock into multiple pieces of broken stones, and multiple slag inlets 1 are arranged around the circumferential surface of the cutter disc. During the rotation process, broken stones are continuously collected from the bottom and enter the slag inlet 1. When it rotates to a high position, the broken stones flow directly from the slag inlet cavity to the conveyor belt. However, its disadvantage is that since the structure between the slag inlet and the conveyor belt is open, when encountering a water-rich rock layer, water and sand gushing will inevitably occur, and mud will continuously flow into the main beam along the slag inlet 1 channel, which may cause machine damage and operator injury accidents in serious cases. In the present invention, in view of encountering water-rich rock formations, a flip plate 6 is set at the entrance of each slag inlet 1, and the resetting function of the compression spring 4 is used to realize the mechanical control of the flip plate 6. When encountering stones and other logistics, they can open the flip plate 6 by squeezing the compression spring 4 due to their own weight after being at a high position, and enter the slag inlet chamber to realize slag feeding. When encountering mud, the reverse plate can be used to reduce its large influx into the machine.

[0027] The flip plate 6 is semicircular and is rotatably connected to the edge of the slag inlet 1 through multiple hinges. The two semicircular flip plates 6 form a first layer of blocking at the slag inlet 1 after docking, which can effectively reduce a large amount of water and sand gushing into the machine in water-rich rock formations.

[0028] The reinforcing connecting support plate 5 is L-shaped, including a long plate and a short plate, and the long plate is connected to the bottom of the spring base 2. The short plate is fixed to the inner wall of the slag inlet chamber by bolts. The spring base 2 is fixed by the reinforcing connecting support plate 5 to form a reinforced connection.

[0029] A connection hole 3 for a disassembly plate is provided below the bottom of each spring base 2. A disassembly plate is connected between the spring bases 2. When the water and sand gushing phenomenon in the water-rich rock formation is more prominent, a detachable plugging plate can be added between the spring bases 2. This detachable form structure is more flexible, and the double-layer plugging can effectively reduce the water and sand gushing phenomenon from entering the machine.

[0030] Implementation Method 1

[0031] In the case of solid rock formation, the reinforcing connecting support plate 5 of the utility model can be fixed to the inside of the slag inlet cavity in sequence, and then the spring base 2 can be installed. The spring base 2 is fastened to the short plate of the reinforcing connecting support plate 5 by bolts. Then the compression spring 4 and the flip plate 6 are installed in sequence. The flip plate 6 can be connected to the entrance of the slag inlet 1 by a plurality of hinges. Of course, other similar mechanical connection structures that can rotate can also be used, and the working principle remains unchanged. And the free end of the compression spring 4 is connected to the bottom of the flip plate 6. When the tunnel boring machine is excavating in a solid rock formation, a large amount of broken stones enter through the slag inlet 1 and accumulate on the flip plate 6. When the broken stones accumulate to a certain extent, with the rotation of the cutter head, the slag inlet 1 rotates to a high position, and the broken stones on the flip plate 6 are deformed by the compression spring 4 due to the self-weight, and flow into the conveyor belt along the channel of the slag inlet cavity. After the broken stones enter the channel, the flip plate 6 is reset under the action of the compression spring 4.

[0032] Implementation Method 2

[0033] When encountering a water-rich rock formation, a removable plate used for sealing or limiting can be connected between the installed spring bases 2 by bolts to enhance the control of the slag feeding amount of the single slag feeding port 1.

[0034] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A slag quantity control device for a TBM cutter head slag inlet, characterized by: The invention comprises two flip plates (6) respectively arranged in each slag inlet (1), a spring base (2) being arranged below each flip plate (6), a spring groove being arranged in the spring base (2), a compression spring (4) being arranged in the spring groove, and the other end of the compression spring (4) being against the bottom of the flip plate (6); a reinforcing connecting support plate (5) being arranged between the spring base (2) and the inner wall of the slag inlet chamber; and the two flip plates (6) being connected to form a circle and blocking below the slag inlet (1).

2. The slag quantity control device for the slag inlet of the TBM cutter head according to claim 1 is characterized by: The turning plate (6) is semicircular and is rotatably connected to the edge of the slag inlet (1) via a plurality of hinges.

3. The slag quantity control device for the slag inlet of the TBM cutter head according to claim 1 is characterized by: The reinforcing connecting support plate (5) is L-shaped, comprising a long plate and a short plate, and the long plate is connected to the bottom of the spring base (2).

4. The slag quantity control device for the slag inlet of the TBM cutter head according to claim 3 is characterized in that: The short plate is fixed to the inner wall of the slag inlet chamber by bolts.

5. The slag quantity control device for the slag inlet of the TBM cutter head according to claim 1, characterized in that: A connection hole (3) for a disassembly plate is provided below the bottom of each spring base (2).

6. The slag quantity control device for the slag inlet of the TBM cutter head according to claim 5, characterized in that: A disassembly plate is connected between the spring bases (2).

Images