Tunnel boring machine secondary transport structure

Abstract

The present invention discloses a secondary transport structure for a roadheader, comprising a transport frame rotatably connected to the roadheader body. The transport frame is equipped with a belt for transporting crushed rock and a chain assembly for driving the belt. The chain assembly comprises a chain group, a connecting plate, a baffle, and a driving member. The chain group is arranged along the length of the belt. The connecting plate is fixed to the chain group and drives with the chain group. The baffle is fixed to the middle of the connecting plate. The belt is located between the baffle and the connecting plate and is fixed to the connecting plate via the baffle. The driving member drives the chain group. The transport frame is provided with side rollers arranged obliquely along the belt transmission direction and located below the belt on both sides. The side rollers lift the two sides of the belt upward, forming a U-shaped groove structure. The present invention not only prevents the conveyor belt from slipping off the frame, but also prevents rock fragments from falling during the conveying process, which could cause slag to be trapped in the transport frame.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel boring machines, in particular to a dual-operation structure of a tunnel boring machine. Background Art

[0002] A roadheader is a large piece of equipment used for tunneling in coal and non-coal mines. It works by using a cutting head to crush coal and rock. The crushed rock is then transported to the roadheader via a transport unit, and then transported to the rear of the roadheader, completing the mining process. Adhering to the principle of giving equal importance to both mining and excavation, and in order to improve mining efficiency, roadheaders require that mining and transportation be carried out simultaneously. As excavation progresses, the length of the transport unit can no longer meet shipping requirements. Therefore, a second transport unit, or secondary transport structure, must be added to the rear of the roadheader. The secondary transport structure primarily consists of a conveyor belt for conveying crushed rock, a frame that secures and supports the conveyor belt, and a motor that drives the conveyor belt. In traditional secondary transport structures, the conveyor belt is directly driven by a rotating rod on the frame. Although the structure is simple, the conveyor belt is prone to slippage due to its own gravity when operating on steep slopes. Furthermore, the conveyor belt leaks rock debris, which in severe cases accumulates on the frame, affecting the normal operation of the conveyor belt. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a secondary transport structure of a roadheader, which can not only prevent the conveyor belt from slipping off the frame, but also prevent rock fragments from falling during the conveying process, causing slag to be caught in the transport frame.

[0004] The technical solution adopted by the present invention is: to provide a secondary transport structure of a tunnel boring machine, which includes a transport frame rotatably connected to the tunnel boring machine body, the transport frame is provided with a belt for transmitting crushed rock and a chain assembly for driving the belt transmission, the chain assembly includes a chain group, a connecting plate, a baffle and a driving member, the chain group is arranged along the length direction of the belt, the connecting plate is fixed to the chain group and is transmitted with the chain group, the baffle is fixed in the middle of the connecting plate, the belt is located between the baffle and the connecting plate and is fixed to the connecting plate through the baffle, the driving member drives the chain group to transmit, the two sides of the transport frame are located below the belt and are provided with obliquely arranged side rollers along the belt transmission direction, the side rollers lift up the two sides of the belt to form a U-shaped groove structure.

[0005] After adopting the above structure, the present invention has the following advantages: compared with the single belt transmission mode, the combined transmission mode of belt and chain is not only stable in transmission, but also has a more accurate transmission ratio; the belt is fixed to the chain through a baffle and a connecting plate to prevent the belt from slipping and falling off the frame, affecting the transportation efficiency; the combination of the baffle and the connecting plate can not only fix the belt and limit the movement of the belt, so that the belt is transmitted with the chain to prevent the belt from being derailed, and the baffle acts as a material barrier on the belt to prevent the broken rock on the belt from being affected by the transmission inertia; the side rollers are obliquely installed at the bottom of both sides of the belt and can be rotated, so that the two sides of the belt are warped to form a U-shape, avoiding the falling of debris on the belt, and the debris can be directly transported away by the belt. At the same time, the side rollers not only support the belt, but also the belt is close to the rolling side rollers, so that the belt slides with reduced friction resistance and the transmission is smoother.

[0006] Preferably, the transport frame includes a material receiving section, a transition section and a tail section in sequence according to the transport direction, and the material receiving section and the transition section, as well as the transition section and the tail section are all detachably connected, wherein the material receiving section is connected to the tunnel boring machine body through a turntable, and the material receiving section, the transition section and the tail section are movably connected and detachable in sequence, which facilitates the disassembly and transportation of the transport frame.

[0007] Preferably, there are several transition sections, which are detachably connected between the material receiving section and the tail section in sequence, so as to be applicable to lanes of different lengths, which is flexible and convenient.

[0008] Preferably, guide plates are provided on both sides of the material receiving section, which play an auxiliary guiding role when the crushed rock is just transported to the initial position of the belt, so that the belt can transfer materials stably and normally, preventing the crushed rock from accumulating at the initial position and affecting the belt's material transfer efficiency. At the same time, manual cleaning of the pile of materials is avoided, thereby increasing the operator's operating safety.

[0009] Preferably, a support member is provided at the bottom of the tail section, and the support member includes a crossbeam detachably connected to the bottom of the tail section, and a walking frame is provided at both ends of the crossbeam. A plurality of height-adjustable walking wheels are provided in the walking frame to achieve adjustable height of the transport frame to adapt to different working conditions in the tunnel and realize horizontal transportation of the belt.

[0010] Preferably, the support member also includes load-bearing bodies located at both ends of the beam, one end of the load-bearing body is provided with a load-bearing surface movably connected to the beam, and the other end is connected to the walking frame. Due to the movement of the load-bearing surface and the beam, the relative distance between the two load-bearing bodies can be adjusted through the load-bearing surface.

[0011] Preferably, there are several side rollers, which are evenly distributed in the transition section to ensure stable belt transmission.

[0012] Preferably, the number of the connecting plates is several and they are equidistantly distributed along the length direction of the chain group. The number of the baffles is the same as the connecting plates and they are distributed one-to-one with the connecting plates. The connecting plates enhance the load-bearing capacity of the belt, and the multiple baffles can prevent the belt from bending or deforming, and prevent the belt and the crushed rock from slipping against each other, thereby ensuring stable belt material transmission.

[0013] Preferably, the driving member includes a rotating shaft distributed at both ends of the belt, the rotating shaft is connected to the transport frame through a bearing, the rotating shaft is provided with a sprocket engaged with the chain group, and the transport frame is provided with a motor for driving the rotating shaft to rotate at the end of the rotating shaft. The driving member is only installed on the material receiving section and the tail section of the transport frame to ensure sufficient power, reduce the overall weight of the transport frame, and alleviate the carrying burden.

[0014] Preferably, the baffle includes a base and a baffle fixed on the base, the base is fixed to the middle of the connecting plate by fasteners, the belt is located between the base and the connecting plate, the base presses and fixes the belt to the connecting plate by fasteners, and the baffle is obliquely arranged in the opposite direction of the belt transmission. The purpose of the oblique arrangement of the baffle is to enhance the strength of the baffle. When the broken rock is squeezed and hits the baffle by the inertia of the belt transmission, the vertically arranged baffle is easily deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the present invention.

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 It is a structural schematic diagram of the material connecting section of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the transition section of the present invention.

[0019] Figure 5 It is a schematic diagram of the tail section structure of the present invention.

[0020] Figure 6 It is a side view schematic diagram of the transition section of the present invention.

[0021] Figure 7 It is a schematic structural diagram of the chain assembly of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the support frame of the present invention.

[0023] Figure 9 It is a schematic diagram of the structure of the driving member of the present invention.

[0024] Among them, 1. Transport frame; 1-1. Material receiving section; 1-2. Transition section; 1-3. Tail section; 1-4. Guide plate; 1-5. Square steel; 2. Belt; 3. Chain assembly; 3-1. Chain group; 3-2. Connecting plate; 3-3. Baffle; 3-3-1. Base; 3-3-2. Baffle; 3-4. Driving part; 3-4-1. Rotating shaft; 3-4-2. Sprocket; 3-4-3. Motor; 3-4-4. Slider; 3-4-5. Bearing; 3-5. Bending plate; 4. Side roller; 5. Turntable; 6. Tunneling machine body; 7. Support part; 7-1. Beam; 7-2. Travel frame; 7-3. Load-bearing body; 7-4. Load-bearing surface; 7-5. Pin. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] This embodiment provides a tunnel boring machine dual-operation structure, such as Figure 1 As shown, it includes a transport frame 1 rotatably connected to the tunnel boring machine body 6, the transport frame 1 is provided with a belt 2 for transporting crushed rock and a chain assembly 3 driven by the belt 2, the chain assembly 3 includes a chain group 3-1, a connecting plate 3-2, a baffle 3-3 and a driving member 3-4, the chain group 3-1 is composed of at least two chain groups 3-1, and are arranged parallel to each other along the length direction of the belt 2, the driving member 3-4 includes a rotating shaft 3-4-1, in this embodiment, the number of the rotating shaft 3-4-1 is two, and they are fixed to the transport frame at both ends of the belt 2 through bearings 3-4-5 respectively, as shown in FIG. Figure 9 As shown, the rotating shaft 3-4-1 is provided with a sprocket 3-4-2 engaged with the chain. Usually, one chain corresponds to the head and tail sprockets 3-4-2. The driving member 3-4 also includes a motor 3-4-3 for driving the rotating shaft 3-4-1. The motor 3-4-3 is a conventional small hydraulic motor 3-4-3, which is fixed to the transport frame 1 at both ends of the rotating shaft 3-4-1. The output shaft of the motor 3-4-3 is directly connected to the rotating shaft 3-4-1. Each rotating shaft 3-4-1 corresponds to two motors 3-4-3. When there are two groups of motors 3-4-3, they drive two rotating shafts 3-4-1 respectively. When there is only one group of motors 3-4-3, it drives the rotating shaft 3-4-1 close to the tunnel boring machine body 6. The rotating shaft 3-4-1 is the driving shaft, and the rotating shaft 3-4-1 located at the tail of the transport frame 1 is the driven shaft. The driven shaft is driven to rotate through the chain via the driving shaft.

[0027] A slider 3-4-4 is also sleeved on the rotating shaft 3-4-1 near the bearing 3-4-5. The slider 3-4-4 has a hole in the middle, and the end of the rotating shaft 3-4-1 is inserted into the hole of the slider 3-4-4 to be fixed. The slider 3-4-4 has grooves on the upper and lower sides, and the corresponding position of the transport frame 1 is provided with a guide rail that matches the groove, so that the slider 3-4-4 can be adjusted along the length direction of the transport frame 1.

[0028] like Figures 3-5 As shown, the transport rack 1 includes a material connection section 1-1, a transition section 1-2 and a tail section 1-3 in the transport direction. The material connection section 1-1, the transition section 1-2 and the tail section 1-3 are detachably connected in sequence, such as hinged, clamped or threaded connections, etc. Figure 2 As shown, one end of the material receiving section 1-1 is connected to the tunnel boring machine body 6 through the turntable 5. The turntable 5 and the tunnel boring machine body 6 are hinged. The material receiving section 1-1 is fixed to the turntable 5 so that the material receiving section 1-1 rotates left and right with the turntable 5. The other end is connected to the transition section 1-2.

[0029] The transport frame 1 is made of square steels 1-5 or I-beams welded and spliced ​​together to ensure overall strength while preventing slag from being trapped on the transport frame 1, which affects transportation efficiency. The spliced ​​square steels 1-5 or I-beams have the following two advantages: 1. When the sections of the transport frame 1 are disassembled and folded and placed on a truck, it is very convenient to position and bind them with fixed ropes, which makes transportation not only convenient and labor-saving, but also safe and reliable; 2. When the secondary transport structure needs to be laid or finished in the tunnel, it is convenient to grab it by hand, or you can use a hook or rope to tie it to any steel bar and drag it to achieve accurate positioning of the transport frame 1 in the tunnel, which is very convenient for narrow and dark tunnels, and the overall installation or disassembly of the transport frame 1 can be completed in a short time, which also indirectly enhances the safety of the operator.

[0030] In this embodiment, the number of transition sections 1-2 can be two or more, and several transition sections 1-2 are detachably connected between the material receiving section 1-1 and the tail section 1-3 in sequence, and adjacent transition sections 1-2 are also detachably connected. Furthermore, the lengths of several transition sections 1-2 can be uniform or different to facilitate alleys with different degrees of curvature.

[0031] like Figure 3 As shown, the transport frame 1 is provided with guide plates 1-4 on both sides of the material splicing section 1-1. The guide plates 1-4 extend from the material splicing sections 1-1 on both sides and are inclined outward at a certain angle. The guide plates 1-4 extend from the turntable 5 as the starting point along the length direction of the transport frame 1. The length of the guide plates 1-4 is less than the length of the material splicing section 1-1. The surface of the guide plates 1-4 is smooth and is provided with evenly distributed through holes.

[0032] The bottom of the tail section 1-3 is provided with a support member 7 for supporting the tail section 1-3. Figure 8As shown, the support member 7 includes a crossbeam 7-1 fixed to the bottom of the tail section 1-3, and the crossbeam 7-1 and the tail section 1-3 are connected by a pin shaft, so that the support frame can rotate freely relative to the tail section 1-3, which not only facilitates the loading and unloading of the support member 7, but also realizes flexible turning in the tunnel. Both ends of the crossbeam 7-1 are respectively provided with walking frames 7-2 distributed along the length direction of the tail section 1-3, and the walking frames 7-2 are provided with a number of walking wheels. The support member 7 also includes a load-bearing body 7-3 located at both ends of the crossbeam 7-1, and one end of the load-bearing body 7-3 is provided with a load-bearing surface 7-4 movably connected to the crossbeam 7-1, and the other end is connected to the walking frame 7-2. The walking frames 7-2 at both ends of the crossbeam 7-1 are adjusted to relative or opposite positions along the crossbeam 7-1 through the load-bearing surface 7-4.

[0033] In addition, the support member 7 also includes a load-bearing body 7-3 located at both ends of the beam 7-1. One end of the load-bearing body 7-3 is provided with a load-bearing surface 7-4 movably connected to the beam 7-1, and the other end is connected to the walking frame 7-2. The load-bearing surface 7-4 is provided with a number of adjustment holes along the length direction of the beam 7-1. The beam 7-1 extends a side at the corresponding position, and corresponding adjustment holes are opened on the side. The load-bearing surface 7-4 is adjustable along the length direction of the beam 7-1. The adjustment holes on the side of the beam 7-1 and the load-bearing surface 7-4 are fixed by fasteners, so that the spacing between the load-bearing bodies 7-3 is adjustable, so that the walking frames 7-2 at both ends of the beam 7-1 can be adjusted relative or oppositely along the beam 7-1 through the load-bearing surface 7-4.

[0034] Pin 7-5 in the pin 7-5 shaft connection is vertically arranged on the beam 7-1, and pin 7-5 has multiple locking positions along the height direction. When pin 7-5 is inserted into the tail section 1-3, pin 7-5 is adjusted in the height direction through multiple locking positions, and finally the height position of the support frame is adjusted to adapt to various environments in the tunnel, and the horizontal placement of the transport frame 1 is achieved through the height adjustment of the support frame, so as to realize the horizontal position transmission of the transport frame 1.

[0035] The connecting plate 3-2 is connected and fixed to the chain group 3-1 and is transmitted with the chain group 3-1. When there are two chains, the two ends of the connecting plate 3-2 are fixed by a bent plate 3-5 and the chain links on the chain, that is, one side of the bent plate 3-5 is fixed to one of the chain links of the chain by bolts, and the other side of the bent plate 3-5 is fixed to the connecting plate 3-2 by bolts, so that the connecting plate 3-2 is firmly fixed to the chain and connected between the two chains; when there are more than two chains, multiple chains are arranged in parallel, and the two ends of the connecting plate 3-2 are fixed to the chain by the bent plates 3-5 according to the same principle, and the middle position of the connecting plate 3-2 can also be fixed by the bent plates 3-5, that is, two bent plates 3-5 are set on both sides of a chain, and each bent plate 3-5 is fixed to the bottom surface of the connecting plate 3-2 by bolts on one side. The other side is bolted and fixed to one of the links of the chain. Multiple chains are treated in the same way, so that multiple chains are distributed in parallel and equidistantly. There are several connecting plates 3-2, and several connecting plates 3-2 are equidistantly distributed along the length direction of the chain to achieve a stable connection between the chain and the connecting plate 3-2. In addition, a baffle 3-3 is provided in the middle position of the connecting plate 3-2, and the baffle 3-3 is arranged along the length direction of the connecting plate 3-2. In this embodiment, the number of baffles 3-3 is the same as that of the connecting plates 3-2, that is, the baffles 3-3 and the connecting plates 3-2 correspond one to one. The baffles 3-3 are usually fixed to the connecting plate 3-2 by bolt connection, and the belt 2 is located between the connecting plate 3-2 and the baffle 3-3 and is fixed by the baffle 3-3 and the connecting plate 3-2, so that the belt 2 follows the connecting plate 3-2, that is, chain transmission, to achieve belt 2 transportation.

[0036] like Figure 7 As shown, the baffle 3-3 includes a base 3-3-1 and a baffle 3-3-2 fixed on the base 3-3-1. The base 3-3-1 is fixed to the middle of the connecting plate 3-2 by fasteners. The baffle 3-3-2 extends from the middle of the base 3-3-1 or is fixed to the base 3-3-1 by welding. The baffle 3-3-2 is obliquely arranged in the opposite direction of the transmission of the belt 2.

[0037] like Figure 6 As shown, obliquely placed side rollers 4 are provided at the bottom of both sides of the belt 2. The side rollers 4 include a fixed shaft and a roller sleeved on the fixed shaft. The fixed shaft is fixed to the transition section 1-2 of the transport frame 1 through a bracket. The fixed shaft is obliquely set, so that the roller is also obliquely set and rolls. The roller is located at the bottom of both sides of the belt 2 and is close to the bottom surface of the belt 2. The roller rolls with the transmission of the belt 2. The side rollers 4 on both sides of the belt 2 are tilted outward, so that the two sides of the belt 2 are warped. The overall cross-section of the belt 2 is U-shaped. There are several side rollers 4, and the several side rollers 4 are evenly and equidistantly distributed along the length direction of the transition section 1-2.

[0038] The above description is based on the preferred embodiments of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be varied. All variations made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A secondary transport structure of a roadheader, comprising a transport frame (1) rotatably connected to a roadheader body (6), wherein the transport frame (1) is provided with a belt (2) for transporting crushed rock and a chain assembly (3) driven by the belt (2), characterized in that: The transport frame (1) comprises a material receiving section (1-1), a transition section (1-2) and a tail section (1-3) in sequence according to the transport direction. The material receiving section (1-1) and the transition section (1-2), and the transition section (1-2) and the tail section (1-3) are all detachably connected, wherein the material receiving section (1-1) is connected to the tunnel boring machine body (6) via a turntable (5); the chain assembly (3) comprises a chain group (3-1), a connecting plate (3-2), a baffle (3-3) and a driving member (3-4); the chain group (3-1) is arranged along the length direction of the belt (2); the connecting plate (3-2) is fixed to the chain group (3-1) and is driven along with the chain group (3-1); the baffle (3-3) is fixed to the middle of the connecting plate; the belt ( 2) is located between the baffle and the connecting plate and is fixed to the connecting plate (3-2) through the baffle (3-3), the driving member (3-4) drives the chain group to transmit, and the two sides of the transport frame (1) are located below the belt and are provided with obliquely arranged side rollers (4) along the belt transmission direction, and the side rollers lift the two sides of the belt upward to form a U-shaped groove structure of the belt; the baffle (3-3) includes a base (3-3-1) and a baffle (3-3-2) fixed on the base (3-3-1), the belt (2) is located between the base (3-3-1) and the connecting plate (3-2), the base (3-3-1) presses and fixes the belt (2) to the connecting plate (3-2) through a fastener, and the baffle (3-3-2) is obliquely arranged in the opposite direction of the belt (2) transmission.

2. The secondary operation structure of the roadheader according to claim 1, characterized in that: There are several transition sections (1-2), which are detachably connected between the material receiving section (1-1) and the tail section (1-3) in sequence.

3. The secondary operation structure of the roadheader according to claim 1, characterized in that: Guide plates (1-4) are provided on both sides of the material receiving section (1-1).

4. The secondary operation structure of the roadheader according to claim 1, characterized in that: A support member (7) is provided at the bottom of the tail section (1-3). The support member (7) comprises a crossbeam (7-1) detachably connected to the bottom of the tail section (1-3). Both ends of the crossbeam (7-1) are provided with walking frames (7-2).

5. The secondary operation structure of the roadheader according to claim 4, characterized in that: The support member (7) further comprises a load-bearing body (7-3) located at both ends of the crossbeam (7-1); one end of the load-bearing body (7-3) is provided with a load-bearing surface (7-4) movably connected to the crossbeam (7-1), and the other end is connected to the walking frame (7-2).

6. The secondary operation structure of the roadheader according to claim 1, characterized in that: The side rollers (4) are multiple in number and are evenly distributed in the transition section (1-2).

7. The secondary operation structure of the roadheader according to claim 1, characterized in that: The number of the connecting plates (3-2) is several and they are equidistantly distributed along the length direction of the chain group (3-1); the number of the baffles (3-3) is the same as the number of the connecting plates (3-2) and they are distributed in a one-to-one correspondence with the connecting plates (3-2).

8. The secondary operation structure of the roadheader according to claim 1, characterized in that: The driving member (3-4) includes a rotating shaft (3-4-1) distributed at both ends of the belt (2); the rotating shaft (3-4-1) is connected to the transport frame (1) through a bearing (3-4-5); a sprocket (3-4-2) meshing with the chain assembly (3-1) is provided on the rotating shaft (3-4-1); and a motor (3-4-3) for driving the rotating shaft (3-4-1) to rotate is provided on the transport frame (1) at the end of the rotating shaft (3-4-1).

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