A continuous belt conveyor slag discharge device for TBM tunneling in cold regions

Abstract

The application discloses a kind of cold region TBM tunneling continuous belt conveyor slag discharging device, including TBM rear supporting belt conveyor, TBM continuous belt conveyor, TBM hole outside slag turning belt conveyor.The rear supporting belt conveyor is connected with main engine belt conveyor, the rear supporting belt conveyor head unloading port is connected with continuous belt conveyor tail material slag buffer bed, and TBM cutterhead cut stone slag is transported to TBM rear supporting belt conveyor by main engine belt conveyor short distance, is dropped on continuous belt conveyor material slag buffer bed by TBM rear supporting belt conveyor short distance transportation by unloading port, is transported to hole outside slag turning belt conveyor by continuous belt conveyor long distance, is transported to discard slag field by hole outside slag turning belt conveyor large slope, and can be used for roadbed filling.The application solves the technical problems that cold region open TBM is difficult to discharge slag in long distance small radius and hole outside large slope under the boundary condition that material transportation in hole is complex and space is limited.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of long and large tunnel TBM construction, and particularly relates to a TBM tunneling continuous belt conveyor slag discharge device in cold regions. BACKGROUND

[0002] In recent years, TBM construction technology has developed rapidly, and various technologies have been widely applied in TBM construction. Most of the technologies are only limited to the TBM equipment itself in the tunnel, and the slag discharge mode matched with TBM tunneling still uses the traditional slag discharge mode of rail transportation in the tunnel and loader cooperation with self-unloading truck for slag transfer outside the tunnel. With the rise of TBM continuous belt conveyor technology, the TBM tunneling slag discharge efficiency is greatly improved, but the traditional loader cooperation with small self-unloading truck for slag discharge and transportation to the slag disposal site is still used for slag transfer outside the tunnel. The construction efficiency is low, the maintenance cost is high in the process, and the influence of uncertain factors such as insufficient transportation capacity of self-unloading truck, interference of detour and bad weather makes the slag discharge capacity inside and outside the tunnel unmatched, which affects the construction progress, and thus the TBM tunneling slag discharge cost is increased invisibly.

[0003] The technical innovation of TBM tunneling continuous belt conveyor slag discharge in long and large tunnels faces new technical challenges in the slag discharge process. The long-distance continuous belt conveyor slag discharge in the tunnel faces the following technical problems: ① the uneven tension caused by the elasticity of long-distance belt; ② the long-distance belt needs to be reduced to the lowest state to ensure that the belt does not slip when starting; ③ the tension balance between the tail driving station and the head driving station of the long-distance belt; ④ the uneven tension caused by the uneven distribution of slag on the belt conveyor; ⑤ the real-time change of belt tension caused by the increase of length during the extension of the belt conveyor; ⑥ the difficulty in matching the slag discharge speed of the curved section of the continuous belt conveyor with the TBM tunneling, and some other technical problems. SUMMARY

[0004] The technical problem to be solved by the present application is the technical problem of long-distance small-radius and large-slope slag discharge outside the tunnel under the boundary conditions of complex material transportation and limited space in the tunnel of open-type TBM in cold regions, and the purpose is to provide a TBM tunneling continuous belt conveyor slag discharge device in cold regions to solve the above problems.

[0005] The present application is realized by the following technical scheme:

[0006] A TBM tunneling continuous belt conveyor slag discharge device in cold regions, comprising a rear matched belt conveyor, a continuous belt conveyor and an outside-tunnel slag transfer belt conveyor, wherein the head of the TBM main machine belt conveyor is connected with the tail of the rear matched belt conveyor, the head of the rear matched belt conveyor is connected with the tail of the continuous belt conveyor, the head of the rear matched belt conveyor is located directly above the tail of the continuous belt conveyor, the head of the continuous belt conveyor is connected with the tail of the outside-tunnel slag transfer belt conveyor, and the head of the continuous belt conveyor is located directly above the tail of the outside-tunnel slag transfer belt conveyor.

[0007] The stone residue cut by the TBM cutter is transported by the main machine belt conveyor to the TBM rear supporting belt conveyor, and then is transported by the TBM rear supporting belt conveyor to the continuous belt conveyor, and then is transported by the continuous belt conveyor to the outside of the tunnel, and then is transported by the outside of the tunnel to the slag field, and can be used for roadbed filling.

[0008] The continuous belt conveyor of the TBM tunneling device also comprises a belt storage bin, which is installed in the tunnel, and the belt storage bin comprises two mobile trolleys and fixed trolleys with P-layer rollers at the front and rear ends, and the belt storage bin also comprises a belt storage frame, a belt dragging trolley slide, a tensioning device and a cleaning device.

[0009] One end of the belt storage bin is provided with a vulcanization table, and when the belt in the belt storage bin is released, the mobile trolley is close to the fixed trolley, and the newly added belt is connected with the main belt on the vulcanization table, and with the resetting of the mobile trolley, the new belt roll is stored in the belt storage bin.

[0010] The tensioning device comprises a frequency conversion starting winch, a steel wire rope and a pulley block, and the frequency conversion winch can be adjusted according to the real-time force of the belt, so that the belt is in a constant pre-tension state, and the belt tension of the whole belt conveyor is balanced synchronously through the PLC control system.

[0011] The rear supporting belt conveyor, the continuous belt conveyor and the outside of the tunnel belt conveyor all comprise a forward belt, a return belt, a forward roller and a return roller, wherein the forward belt is close to the forward roller, and the return belt is close to the return roller.

[0012] The forward belt, the forward roller, the return belt and the return roller in the rear supporting belt conveyor are fixedly installed on the rear supporting belt conveyor support frame through bolts, and the rear supporting belt conveyor support frame is installed at the top center of the rear supporting trolley.

[0013] The rear supporting belt conveyor also comprises a deviation preventing device, a de-ironing device, a discharging port and a driving motor, the discharging port is arranged at the head of the rear supporting belt conveyor, the deviation preventing device is arranged at both sides of the belt edge of the rear supporting belt conveyor and is fixedly installed on the belt conveyor support frame to prevent the belt from deviating when the belt conveyor is running at a high speed.

[0014] The outgoing belt, outgoing roller, return belt and return roller in the continuous belt conveyor are fixed with the belt conveyor support frame through bolts, the continuous belt conveyor support frame is suspended directly above the hole top through the mortar anchor rod and the circular ring guide chain; in the small radius curve section of the continuous belt conveyor, the adjustable bolt and the adjustable crank arm are arranged between the bottom of the outgoing roller and the belt conveyor support frame, the corresponding throw height is adjusted according to the size of the curve radius and the size of the belt conveyor discharging speed, and the anti-deviation device is arranged at the belt edge in the direction close to the curve inner diameter at a certain distance.

[0015] The head of the continuous belt conveyor is provided with a continuous belt conveyor driven drum, a tensioning roller, a discharging buffer bed and an anti-deviation device.

[0016] The diameter of the continuous belt conveyor driven drum is greater than that of the tensioning roller, the belt rotates around the continuous belt conveyor driven drum when passing through the continuous belt conveyor driven drum to change the direction, the tensioning roller is beside the continuous belt conveyor driven drum and contacts the outer side of the belt, the contact surface of the tensioning roller extrudes the belt to make the belt tensioned, the anti-deviation device is arranged at the two sides of the belt edge at a certain distance and is fixed with the belt conveyor support frame, and the discharging buffer bed is arranged below the discharging port of the rear matched belt conveyor.

[0017] The middle part of the continuous belt conveyor is provided with a middle part driving device, the middle part driving device comprises X driving wheels, M variable frequency driving motors and a cleaning device, wherein X=M, the middle part driving device is installed at a position away from the hole by N kilometers to reduce the tension generated by the long distance belt in the process of starting, running and stopping, and N is greater than or equal to 5.

[0018] The head of the continuous belt conveyor is provided with a hole-out slagging belt conveyor driven roller, a head driving device and a cleaning device.

[0019] The hole-out slagging belt conveyor driven roller is located at the tail of the hole-out slagging belt conveyor, the hole-out slagging belt conveyor driven roller is wrapped by the discharging port of the continuous belt conveyor directly above, and the head driving device is installed between the belt storage bin and the hole-out slagging belt conveyor.

[0020] The outgoing belt, outgoing roller, return belt and return roller in the hole-out slagging belt conveyor are fixed with the belt conveyor support frame through steel members and bolts, and the hole-out slagging belt conveyor support frame is supported on the steel plate support surface of the heat preservation shed through a steel truss.

[0021] Three sides of the heat preservation shed of the hole-out slagging belt conveyor are wrapped with rock wool insulation boards, a steel plate bottom surface is arranged on the bottom surface of the heat preservation shed, a plurality of steel trusses are arranged on the bottom of the heat preservation shed, each steel truss is spaced by Y centimeters to support and adjust the longitudinal slope, Y is a natural number greater than zero, Y heat supply and heat preservation settings are arranged in the heat preservation shed, and a solar panel is fixedly installed on the top of the heat preservation shed to provide electric energy for the heat supply setting.

[0022] The head drive of the slag turning belt conveyor outside the hole comprises a variable frequency drive motor and a slag turning belt conveyor drive wheel, and the head drive device is stably connected with the expanded concrete foundation through a steel truss, and the rigidity of the foundation is utilized to overcome the tension of the large slope belt.

[0023] The tensioning mode of the slag turning belt conveyor outside the hole adopts a heavy hammer tensioning mode, which comprises Z tensioning rollers and Z heavy hammers, wherein Z>=2.

[0024] The cleaning device is an infrared radiation switch end head obliquely installed on the top surface of the outgoing belt and emits an infrared light beam, and the residual stone slag on the top surface of the belt blocks the infrared light beam after the slag is unloaded, at this time, the infrared switch is touched, so that the cleaning device is started, and a plurality of water curtain nozzles spray water to form a water curtain to clean the residual stone slag on the belt.

[0025] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0026] 1. The continuous belt conveyor tensioning device adopts a winch tensioning form controlled by a variable frequency of a certain power, and the advantage is that the variable frequency winch can be adjusted according to the real-time stress of the belt to ensure that the belt is in a constant pre-tension state. The long-distance continuous belt conveyor in the hole increases the middle drive to reduce the tension generated during the start, operation and shutdown of the long-distance belt.

[0027] 2. The present application adopts a variable frequency winch, which overcomes the imbalance of the tension of the long-distance belt caused by the elasticity of the long-distance belt, ensures that the tension of the long-distance belt is reduced to the lowest state, thereby ensuring that the belt does not slip during start, the tension of the belt between the tail drive station and the head drive station of the long-distance belt conveyor is balanced, the imbalance of the tension of the belt caused by the uneven distribution of the slag on the belt conveyor, and the real-time change of the tension of the belt caused by the increase of the length during the extension of the belt conveyor.

[0028] 3. The variable frequency winch is adopted as the tensioning mode of the belt conveyor of the present application. The information of the belt tension monitoring system and the real-time data of the winch are fed back to the PLC control system, and the control system automatically issues instructions to meet the tension required for the normal work of the continuous belt conveyor, and the balance and synchronization of the belt tension of the long-distance belt conveyor are realized.

[0029] 4. The continuous belt conveyor and the slag turning belt conveyor outside the hole are provided with multiple cleaning devices, a plurality of nozzles are started to form a water curtain through an infrared radiation switch, the cleanliness of the long-distance belt is ensured, the wear of the carrier roller and the belt is greatly reduced, and the cleanliness of the personnel, vehicles and air in the channel below the belt conveyor and in the hole is ensured.

[0030] 5. The continuous belt conveyor hole top suspension has the following advantages: ① It occupies less tunnel cross-section space, leaving more space for other arrangements, and does not affect other traffic arrangements in the tunnel; ② The suspension type uses a chain and a simple square tube, bracket and the like to form, compared with the support type, it uses less material, and is simple and easy to install and disassemble, and is more conducive to the extension of the TBM; ③ Since the belt conveyor is in a suspended state as a whole, it has a certain degree of freedom, which can play a buffering and self-adjusting role, reducing the probability of belt deviation, and being more suitable for curved sections; ④ The belt conveyor rack is suspended as a whole by a guide chain on the top of the tunnel, and only two anchor rods need to be installed at the top of the tunnel at certain intervals, and if a steel arch support section with poor rock conditions is encountered, only two hooks need to be welded at the corresponding position. Compared with the support type, the suspension type is more simple in operation process.

[0031] 6. For the curved section continuous belt conveyor, adjustable movable idlers are arranged on the left and right and up and down, the corresponding throw height is set according to the corresponding curve radius and the tunneling speed, and a deviation prevention device is arranged on the inside, which is simple, safe and reliable in operation, and ensures the safety of the belt in the curved section, and improves the efficiency of TBM tunneling in the curved section.

[0032] 7. The long-distance continuous belt conveyor in the tunnel is connected with the large-slope slag transfer belt conveyor outside the tunnel to discharge slag, avoiding the problems of low efficiency, high equipment maintenance cost of the traditional loader combined with the dump truck outside the tunnel. At the same time, it avoids the influence of uncertain factors such as insufficient transportation capacity, interference of the detour and bad weather, so that the discharge capacity inside and outside the tunnel is not matched, affecting the construction progress of TBM tunneling.

[0033] 8. The outside slag transfer belt conveyor has a large one-time investment cost, but the construction organization is simple, and the use of intelligent and information monitoring and maintenance methods reduces construction failures and saves maintenance costs.

[0034] 9. In order to overcome the problem of difficult transportation of the large-slope slag transfer belt conveyor outside the tunnel, a head drive is arranged at the large-slope upper end of the slag transfer belt conveyor outside the tunnel, a variable frequency drive motor is controlled, the head drive is fixed through a steel truss and a concrete enlarged foundation, multiple heavy hammers are arranged in the middle to overcome the tension of the large-slope belt, improve the reliability of the drive device, prolong the service life of the slag transfer belt conveyor outside the tunnel, and the maintenance is convenient and the slag is quickly lifted and not easy to scatter at a large slope.

[0035] 10. The slag transfer belt conveyor outside the tunnel uses rock wool insulation boards to build an insulation shed, multiple insulation devices are installed on both sides of the shed, ensuring the normal operation of the slag transfer belt conveyor outside the tunnel under extreme conditions in cold areas, and realizing the fast and efficient tunneling efficiency of TBM. Through the solar panels on the top of the greenhouse to generate electricity for the insulation equipment, natural resources are fully utilized, which is conducive to environmental protection and saves construction costs. BRIEF DESCRIPTION OF DRAWINGS

[0036] The drawings described herein are intended to provide further understanding of the embodiments of the present application, form a part of the present application, and do not constitute a limitation of the embodiments of the present application. In the drawings:

[0037] Figure 1 The continuous belt conveyor, the rear matched belt conveyor and the continuous belt conveyor in the embodiments of the present application are shown in the schematic diagram.

[0038] Figure 2 The belt storage bin, the belt storage bin and the slag turning belt conveyor outside the hole in the embodiments of the present application are shown in the schematic diagram.

[0039] Figure 3 The longitudinal section of the slag turning belt conveyor outside the hole in the embodiments of the present application is shown in the schematic diagram.

[0040] Figure 4 The hole top suspension schematic diagram of the continuous belt conveyor in the embodiments of the present application is shown in the schematic diagram.

[0041] Figure 5 The hole top suspension schematic diagram of the slag turning belt conveyor outside the hole in the embodiments of the present application is shown in the schematic diagram.

[0042] Figure 6 The straight section belt roller schematic diagram in the embodiments of the present application is shown in the schematic diagram.

[0043] Figure 7 The curved section belt roller schematic diagram in the embodiments of the present application is shown in the schematic diagram.

[0044] Figure 8 The curved section belt roller adjustment schematic diagram in the embodiments of the present application is shown in the schematic diagram. Figure I

[0045] Figure 9 The curved section belt roller adjustment schematic diagram in the embodiments of the present application is shown in the schematic diagram. Figure II

[0046] In the drawings, 1 is a rear matched belt conveyor; 2 is a deviation prevention device; 3 is a discharging buffer bed; 4 is a discharging port; 5 is a driving motor; 6 is a continuous belt conveyor driven drum; 7 is a tensioning drum; 8 is a circular ring guide chain; 9 is a forward travel roller; 10 is a return roller; 11 is a continuous belt conveyor; 12 is a forward travel belt; 13 is a return belt; 14 is a frequency conversion starting winch; 15 is a tensioning steel wire rope; 16 is a pulley block; 17 is a fixed trolley; 18 is a slag turning belt conveyor driven roller outside the hole; 19 is a movable trolley; 20 is a driving wheel; 21 is a frequency conversion driving motor; 22 is a slag turning belt conveyor outside the hole; 23 is a drum; 24 is an infrared opposite shooting switch; 25 is a water curtain nozzle; 26 is a slag turning belt conveyor driving wheel; 27 is a head driving; 28 is a discharging port; 29 is a vulcanization platform; 30 is a rock wool heat preservation plate; 31 is a steel truss; 32 is a belt conveyor support frame; 33 is an adjustable bolt; 34 is a crank arm; 35 is a heavy hammer tensioning; 36 is a heat supply heat preservation device; and 37 is a solar panel. DETAILED DESCRIPTION​​

[0047] In order to make the purpose, technical solutions and advantages of the present application clearer, further detailed description of the present application is made below in combination with examples and drawings, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not limit the present application. It should be noted that the present application has been in the actual research and development stage.

[0048] According to Figures 1-9 As shown in FIG. 1, a continuous belt conveyor slag discharge device for TBM tunneling in cold regions comprises a rear matched belt conveyor 1, a deviation prevention device 2, a discharging buffer bed 3, a discharging opening 4, a driving motor 5, a continuous belt conveyor driven drum 6, a tensioning drum 7, a circular ring guide chain 8, a forward travel idler 9, a return travel idler 10, a continuous belt conveyor 11, a forward travel belt 12, a return travel belt 13, a variable frequency starting winch 14, a tensioning steel wire rope 15, a pulley block 16, a fixed trolley 17, a hole-out slag turning belt conveyor driven drum 18, a movable trolley 19, a driving wheel 20, a variable frequency driving motor 21, a hole-out slag turning belt conveyor 22, a drum 23, an infrared pair of switches 24, a water curtain spray head 25, a slag turning belt conveyor driving wheel 26, a head driving 27, a discharging opening 28, a vulcanization platform 29, a rock wool insulation board 30, a steel truss 31, a belt conveyor support frame 32, an adjustable bolt 33, a crank arm 34, a weight tensioning 35, a heat supply and insulation arrangement 36, and a solar panel 37.

[0049] The head of the TBM main machine belt conveyor is connected with the tail of the rear matched belt conveyor 1, the head of the rear matched belt conveyor 1 is connected with the tail of the continuous belt conveyor 11, and the head of the rear matched belt conveyor 1 is located directly above the tail of the continuous belt conveyor 11, the head of the continuous belt conveyor 11 is connected with the tail of the hole-out slag turning belt conveyor 22, and the head of the continuous belt conveyor 11 is located directly above the tail of the hole-out slag turning belt conveyor 22.

[0050] The stone slag cut by the TBM cutter is transported by the main machine belt conveyor to the TBM rear matched belt conveyor 1 for short-distance transportation, falls through the discharging opening 4 to the discharging buffer bed 3 of the continuous belt conveyor 11, is transported by the continuous belt conveyor 11 to the hole-out slag turning belt conveyor 22 for long-distance transportation, and is transported by the hole-out slag turning belt conveyor 22 to the slag disposal site for large slope transportation, which can be used for roadbed filling.

[0051] The continuous belt conveyor slag discharge device for TBM tunneling in cold regions further comprises a belt storage bin, the belt storage bin is installed in a hole, the belt storage bin comprises two movable trolleys and fixed trolleys 17 with P-layer drums 23 at the front and rear ends, the belt storage bin further comprises a belt storage frame, a belt dragging trolley slide, a tensioning device, and a cleaning device, and the belt storage bin achieves the purpose of storing the belt through layer-by-layer winding of the belt on the drums 23 of the movable trolleys and the fixed trolleys 17;

[0052] The vulcanizing table is installed at one end of the belt storage bin. When the belt in the belt storage bin is released, the moving trolley is close to the fixed trolley 17, and the newly added belt is connected with the main belt on the vulcanizing table. With the resetting of the moving trolley, the new belt roll is stored in the belt bin.

[0053] The tensioning device comprises a variable frequency starting winch 14, a steel wire rope and a pulley block 16. The variable frequency winch can be adjusted according to the real-time force of the belt, so as to ensure that the belt is in a constant pre-tension state and the belt tension is balanced during the TBM tunneling process. The balance and synchronization of the belt tension of the whole belt conveyor are realized through a PLC control system.

[0054] The tensioning device of the continuous belt conveyor 11 adopts a winch tensioning form controlled by a variable frequency of a certain power. The advantage is that the variable frequency winch can be adjusted according to the real-time force of the belt, so as to ensure that the belt is in a constant pre-tension state. The long-distance continuous belt conveyor 11 in the tunnel is provided with a middle drive to reduce the tension generated during the start, operation and shutdown of the long-distance belt.

[0055] The rear matching belt conveyor 1, the continuous belt conveyor 11 and the slag turning belt conveyor 22 outside the tunnel all comprise a forward belt 12, a return belt 13, a forward roller 9 and a return roller 10. The forward belt 12 is tightly attached to the forward roller 9, and the return belt 13 is tightly attached to the return roller 10. The forward belt 12 is located above the return belt 13 and is parallel and equidistant to the return belt 13.

[0056] The forward belt 12, the forward roller 9, the return belt 13 and the return roller 10 in the rear matching belt conveyor 1 are fixedly installed with the rear matching belt conveyor 1 support frame 32 through bolts, and the rear matching belt conveyor 1 support frame 32 is installed at the top center of the rear matching trolley.

[0057] The rear matching belt conveyor 1 further comprises a deviation preventing device 2, a metal detector, a discharge port 4 and a driving motor 5. The discharge port 4 is arranged at the head of the rear matching belt conveyor 1, and the deviation preventing device 2 is arranged at both sides of the belt edge of the rear matching belt conveyor 1 and is fixedly installed with the belt conveyor support frame 32. The driving motor 5 is installed at the head of the rear matching belt conveyor 1, and the driving motor 5 provides power for the rotation of the belt of the rear matching belt conveyor 1. The metal detector is used to remove the iron components in the slag to prevent scratching the belt.

[0058] The outgoing belt 12, the outgoing roller 9, the return belt 13 and the return roller 10 in the continuous belt conveyor 11 are fixed by bolt installation with the belt conveyor support frame 32, and the continuous belt conveyor 11 support frame 32 is suspended above the tunnel top through the mortar anchor rod and the circular ring guide chain 8; in the small radius curve section of the continuous belt conveyor 11, the adjustable bolt 33 and the adjustable crank arm 34 are arranged between the bottom of the outgoing roller 9 and the belt conveyor support frame 32, the corresponding throw height is adjusted according to the size of the curve radius and the size of the belt conveyor slag discharge speed, and the anti-deviation device 2 is arranged at the belt edge in the direction close to the curve inner diameter at a certain distance.

[0059] The tunnel top suspension of the continuous belt conveyor 11 has the following advantages: ①It occupies less tunnel cross-sectional space, reserves a larger space for other settings, and does not affect other traffic settings in the tunnel; ②The suspension type is composed of a lifting chain and a simple square tube, a bracket and the like, and compared with the support type, it uses less material, is simple and easy to install and disassemble, and is more conducive to the extension of the belt conveyor in cooperation with the TBM; ③Since the whole belt conveyor is in a suspended state, it has a certain degree of freedom, can play a buffering and self-adjusting role, reduces the probability of belt deviation, and is more suitable for the curve section; ④The belt conveyor frame is suspended on the tunnel top by the guide chain, only two anchor rods need to be installed on the tunnel top at a certain distance, and if a steel arch support section with poor rock conditions is encountered, two lifting hooks need to be welded at the corresponding positions. Compared with the support type, the suspension type is more simple in operation process.

[0060] The continuous belt conveyor 11 is provided with a continuous belt conveyor driven drum 6, a tensioning roller, a discharging buffer bed 3 and an anti-deviation device 2 at the head.

[0061] The diameter of the continuous belt conveyor driven drum 6 is greater than that of the tensioning roller, the belt rotates around the continuous belt conveyor driven drum 6 when passing through the continuous belt conveyor driven drum 6 to change the direction, the tensioning roller is beside the continuous belt conveyor driven drum 6 and contacts the outer side of the belt, the contact surface of the tensioning roller extrudes the belt to make the belt tensioned, the anti-deviation device 2 is arranged at a certain distance on both sides of the belt edge and is fixed with the belt conveyor support frame 32, and the discharging buffer bed 3 is arranged below the discharging port 4 of the rear supporting belt conveyor 1.

[0062] The middle part of the continuous belt conveyor 11 is provided with a middle part driving device, the middle part driving device comprises X driving wheels 20 and M variable frequency driving motors 21, and a cleaning device, wherein X=M, the middle part driving device is installed at a position 5 kilometers away from the tunnel opening to reduce the tension generated by the long distance belt during starting, running and stopping, and N≥5.

[0063] The continuous belt conveyor 11 is provided with a tunnel outside slag turning belt conveyor driven drum 18, a head driving device 27 and a cleaning device at the head.

[0064] Wherein, the driven roller 18 of the slag turning belt conveyor outside the hole is located at the tail of the slag turning belt conveyor 22 outside the hole, and is wrapped by the discharge port 4 of the continuous belt conveyor 11 directly above the driven roller 18. The head driving device 27 is installed between the belt storage bin and the slag turning belt conveyor outside the hole.

[0065] The outbound belt 12, the outbound roller 9, the return belt 13, the return roller 10 in the slag turning belt conveyor 22 outside the hole and the belt conveyor support frame 32 are fixed by steel members and bolts, and the support frame 32 of the slag turning belt conveyor 22 outside the hole is supported on the steel plate support surface of the heat preservation shed through the steel truss 31.

[0066] The heat preservation shed of the slag turning belt conveyor 22 outside the hole is wrapped with rock wool insulation board 30 on three sides, and a steel plate bottom is arranged at the bottom of the heat preservation shed. A plurality of steel trusses 31 are arranged at the bottom of the heat preservation shed, each steel truss 31 is spaced Y centimeters apart, Y is a natural number not equal to zero, and Y heat supply and heat preservation devices 36 are arranged inside the heat preservation shed. A solar panel 37 is fixedly installed at the top of the heat preservation shed to provide electric energy for the heat supply device.

[0067] The slag turning belt conveyor 22 outside the hole adopts a head driving device 27, which includes a variable frequency driving motor 21 and a slag turning belt conveyor driving wheel 26. The head driving device 27 is stably connected with the expanded concrete foundation through the steel truss 31, and the rigidity of the foundation itself is used to overcome the tension of the large slope belt.

[0068] In order to overcome the problem of difficult transportation of the slag turning belt conveyor 22 outside the hole on a large slope, a head driving device 27 is arranged at the large slope upper end of the slag turning belt conveyor 22 outside the hole, and a variable frequency driving motor 21 is arranged at the large slope upper end of the slag turning belt conveyor 22 outside the hole. The head driving device 27 is fixed with the expanded concrete foundation through the steel truss 31, a plurality of heavy hammer tensioning devices 35 are arranged in the middle to overcome the tension of the large slope belt, improve the reliability of the driving device, prolong the service life of the slag turning belt conveyor 22 outside the hole, and maintain convenient and fast lifting of the slag on the large slope without easy scattering.

[0069] The tensioning mode of the slag turning belt conveyor 22 outside the hole adopts a heavy hammer tensioning mode, which includes Z tensioning rollers and Z heavy hammers, where Z≥2.

[0070] The continuous belt conveyor 11 and the slag turning belt conveyor 22 outside the hole adopt a variable frequency winch, which overcomes the problem of uneven tension of the long distance belt caused by the elasticity of the long distance belt itself, ensures that the long distance belt is in the lowest state to ensure that the belt does not slip when starting, the tension of the belt between the tail driving station and the head driving station of the long distance belt conveyor is balanced, the tension of the belt is not balanced when the slag on the belt conveyor is not evenly distributed, and the tension of the belt changes in real time due to the increase in length during the extension process.

[0071] The winch machine with frequency conversion start is used as the tensioning mode of the belt conveyor of the project. The information of the belt tension monitoring system and the real-time data of the winch machine are fed back to the PLC control system, and the control system automatically issues instructions to meet the tensioning force required for the normal operation of the continuous belt conveyor 11, thereby achieving the balance and synchronization of the belt tensioning force of the long-distance belt conveyor.

[0072] The cleaning device is an infrared radiation switch 24, the end of which is installed obliquely on the top surface of the delivery belt 12 and emits an infrared light beam. After the slag is unloaded, the residual stone slag on the top surface of the belt blocks the infrared light beam, at which time the infrared switch is touched, thereby starting the cleaning device, and several rows of water curtain nozzles 25 spray water to form a water curtain to clean the residual stone slag on the belt. Embodiment

[0073] This embodiment 1 provides a slag discharge device for a TBM tunneling continuous belt conveyor in a cold region, as shown in Figures 1-9

[0074] Combined with a certain 22.13 km super-long tunnel in Xinjiang, which is located in a high-cold and high-altitude area, the tunnel adopts a “3-hole + 4-vertical shaft” design scheme, the pilot tunnel adopts an open TBM method for tunneling, the design excavation diameter is 8430 mm, the total machine length is 285 m, the open TBM tunneling at the exit end of the tunnel is 10.801 km, the 11 km continuous belt conveyor 11 in the hole is used for slag discharge, and the slope from the tail of the open TBM to the outside of the hole is: +0.5 (3.17 km long) uphill →-0.5% (7.305 km long) downhill →-1.0% (0.525 km long) downhill, and the curve radius is 5535 m. A 330 m continuous belt conveyor 11 is arranged outside the hole to relay the slag discharge, the height difference is 19 m, and the climbing height is +5.8%.

[0075] Specifically, a slag discharge device for a TBM tunneling continuous belt conveyor in a cold region, comprising a rear matching belt conveyor 1, a continuous belt conveyor 11, and an outside slag transfer belt conveyor 22, wherein the TBM main machine belt conveyor head is connected with the rear matching belt conveyor 1 tail, the rear matching belt conveyor 1 head is connected with the continuous belt conveyor 11 tail, and the rear matching belt conveyor 1 head is located directly above the continuous belt conveyor 11 tail, the continuous belt conveyor 11 head is connected with the outside slag transfer belt conveyor 22 tail, and the continuous belt conveyor 11 head is located directly above the outside slag transfer belt conveyor 22 tail, wherein the stone slag cut by the TBM cutter head is transported by the main machine belt conveyor to the TBM rear matching belt conveyor 1 for short-distance transportation, falls through the discharge port 4 to the continuous belt conveyor 11 discharge buffer bed 3 through the TBM rear matching belt conveyor 1 for short-distance transportation, is transported by the continuous belt conveyor 11 to the outside slag transfer belt conveyor 22 for long-distance transportation, and is transported by the outside slag transfer belt conveyor 22 to the slag disposal site for large-slope transportation, which can be used for roadbed filling.

[0076] ​The continuous belt conveyor discharging device of the TBM tunneling in cold regions also comprises a belt storage bin, the belt storage bin is installed in the hole, the belt storage bin comprises two mobile trolleys and fixed trolleys 17 with P-layer rollers 23 at the front and rear ends, the belt storage bin also comprises a belt storage frame, a belt dragging trolley slide, a tensioning device and a cleaning device, the belt storage bin stores the belt through layer-by-layer winding of the belt on the rollers 23 of the mobile trolleys and the fixed trolleys 17;

[0077] One end of the belt storage bin is provided with a vulcanization table, when the belt in the belt storage bin is released, the mobile trolley approaches the fixed trolley 17, the newly added belt is connected with the main machine belt on the vulcanization table, and with the resetting of the mobile trolley, the new belt roll is stored in the belt bin.

[0078] The tensioning device comprises a variable frequency starting winch 14, a steel wire rope and a pulley block 16. The variable frequency winch can be adjusted according to the real-time stress of the belt, so that the belt is kept in a constant pre-tension state, and the belt tension is kept in a balanced state during the TBM tunneling process. The balance and synchronization of the belt tension of the whole belt conveyor are realized through a PLC control system.

[0079] The rear matched belt conveyor 1, the continuous belt conveyor 11 and the hole outer slag turning belt conveyor 22 all comprise a forward belt 12, a return belt 13, a forward roller 9 and a return roller 10, wherein the forward belt 12 is tightly attached to the forward roller 9, and the return belt 13 is tightly attached to the return roller 10. The forward belt 12 is located above the return belt 13, and is parallel and equidistant to the return belt 13.

[0080] The forward belt 12, the forward roller 9, the return belt 13 and the return roller 10 in the rear matched belt conveyor 1 are fixedly installed on the rear matched belt conveyor 1 support frame 32 through bolts, and the rear matched belt conveyor 1 support frame 32 is installed at the top center of the rear matched trolley.

[0081] The rear matched belt conveyor 1 also comprises a deviation preventing device 2, a metal detector, a discharge port 4 and a driving motor 5. The discharge port 4 is arranged at the head of the rear matched belt conveyor 1, the deviation preventing device 2 is arranged at both sides of the belt edge of the rear matched belt conveyor 1 and is fixedly installed with the belt conveyor support frame 32. The driving motor 5 is installed at the head of the rear matched belt conveyor 1, and provides power for the rotation of the belt of the rear matched belt conveyor 1. The metal detector is used to remove the iron components in the slag to prevent scratching the belt.

[0082] The outbound belt 12, the outbound roller 9, the return belt 13 and the return roller 10 in the continuous belt conveyor 11 are fixed by bolt installation with the belt conveyor support frame 32, and the continuous belt conveyor 11 support frame 32 is suspended above the hole top through the mortar anchor rod and the circular ring guide chain 8; in the small radius curve section of the continuous belt conveyor 11, the adjustable bolt 33 and the adjustable crank arm 34 are arranged between the bottom of the outbound roller 9 and the belt conveyor support frame 32, the corresponding throw height is adjusted according to the size of the curve radius and the size of the belt conveyor discharging speed, and the anti-deviation device 2 is arranged at the belt edge in the direction close to the curve inner diameter at a certain distance.

[0083] The head of the continuous belt conveyor 11 is provided with a continuous belt conveyor driven drum 6, a tensioning roller, a discharging buffer bed 3 and an anti-deviation device 2.

[0084] The diameter of the continuous belt conveyor driven drum 6 is greater than that of the tensioning roller, the belt rotates around the continuous belt conveyor driven drum 6 when passing through the continuous belt conveyor driven drum 6 to change the direction, the tensioning roller is beside the continuous belt conveyor driven drum 6 and contacts the outer side of the belt, the contact surface of the tensioning roller extrudes the belt to make the belt tensioned, the anti-deviation device 2 is arranged at the belt edge on both sides at a certain distance and is fixed with the belt conveyor support frame 32, and the discharging buffer bed 3 is arranged below the discharging port 4 of the rear matched belt conveyor 1.

[0085] The middle part of the continuous belt conveyor 11 is provided with a middle part driving device, the middle part driving device comprises one driving wheel 20, one variable frequency driving motor 21 and a cleaning device, and the middle part driving device is installed at a position 5.5 kilometers away from the hole to reduce the tension generated by the long distance belt in the starting, running and stopping processes.

[0086] The head of the continuous belt conveyor 11 is provided with a hole outer slag turning belt conveyor driven drum 18, a head driving device 27 and a cleaning device.

[0087] The hole outer slag turning belt conveyor driven drum 18 is located at the tail of the hole outer slag turning belt conveyor 22, the hole outer slag turning belt conveyor driven drum 18 is wrapped by the discharging port 4 of the continuous belt conveyor 11 above, and the head driving device 27 is installed between the belt storage bin and the hole outer slag turning belt conveyor.

[0088] The outbound belt 12, the outbound roller 9, the return belt 13 and the return roller 10 in the hole outer slag turning belt conveyor 22 are fixed by steel members and bolts with the belt conveyor support frame 32, and the support frame 32 of the hole outer slag turning belt conveyor 22 is supported on the steel plate support surface of the heat preservation shed through the steel truss 31.

[0089] The three sides of the heat preservation shed of the slag turning belt conveyor 22 outside the hole are wrapped with rock wool heat preservation boards 30, the bottom surface of the heat preservation shed is provided with a steel plate bottom surface, a plurality of steel trusses 31 are arranged at the bottom of the heat preservation shed, each steel truss 31 is spaced apart by 900 centimeters, and the steel trusses 31 are used to support and adjust the longitudinal slope, Y is a natural number other than zero, Y heat supply and heat preservation devices 36 are arranged inside the heat preservation shed, and a solar panel 37 is fixedly installed at the top of the heat preservation shed to provide electric energy for the heat supply device.

[0090] The slag turning belt conveyor 22 outside the hole is provided with a head drive 27, the head drive 27 comprises a variable frequency drive motor 21 and a slag turning belt conveyor drive wheel 26, the head drive 27 is stably connected to the expanded concrete foundation by the steel trusses 31, and the rigidity of the foundation itself is used to overcome the tension of the large slope belt.

[0091] The tensioning mode of the slag turning belt conveyor 22 outside the hole is a heavy hammer tensioning mode 35, which comprises one tensioning roller and Z heavy hammers, and Z is greater than or equal to 2.

[0092] The cleaning device is an infrared radiation switch 24, the end of which is obliquely installed on the top surface of the outgoing belt 12, and emits an infrared light beam. After the slag is unloaded, the residual stone slag on the top surface of the belt blocks the infrared light beam. At this time, the infrared switch is touched, so that the cleaning device is started, and a plurality of water curtain nozzles 25 spray water to form a water curtain to clean the residual stone slag on the belt.

[0093] The project adopts a long-distance continuous belt conveyor 11 hole top suspension technology, an infrared radiation cleaning device, a curve section setting adjustable throw-off amount of roller, and a hole setting expanded chamber installation belt storage bin. The heat preservation cost of construction in cold regions is saved. The tensioning device adopts a variable frequency winch to overcome the technical problems of uneven tension caused by the elasticity of the long-distance belt. Information and intelligent detection means are used to improve the slag discharge efficiency of the long-distance continuous belt conveyor 11 inside the hole and improve the service life of the continuous belt conveyor 11.

[0094] The 330m slag turning belt conveyor outside the hole starts at the head of the continuous belt conveyor 11 and ends at the slag dump, spans the railway embankment in the middle, and the belt support is designed along the natural slope to reduce the damage to the railway embankment. The railway embankment is climbed in advance to overcome the height difference, lengthen the slope distance, and start the slope in advance. The transportation slope of the slag turning belt is controlled within a safe range. The slag turning belt conveyor 22 outside the hole is provided with a head drive 27, a variable frequency drive motor 21 control, the head drive 27 is fixed with the concrete expanded foundation through the steel trusses 31, a plurality of heavy hammer tensioning devices 35 are arranged in the middle to overcome the tension of the large slope belt, infrared radiation cleaning devices are arranged at intervals, rock wool heat preservation boards 30 are used to close the shed in cold regions, a plurality of heat supply and heat preservation devices 36 are arranged in the shed, solar panels 37 provide electric energy, resource waste is avoided, the slag discharge efficiency is improved, the reliability of the driving device is improved, the service life of the slag turning belt conveyor 22 outside the hole is prolonged, maintenance is convenient, and the stone slag is quickly lifted and not easy to scatter under a large slope.

[0095] The above detailed description of the specific embodiments of the present application is provided for the purpose of further explaining the objects, technical solutions and advantages of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous belt conveyor slagging device for TBM tunneling in cold regions, characterized in that, The application relates to a TBM (Tunnel Boring Machine) tailing belt conveyor system, which comprises a rear matching belt conveyor (1), a continuous belt conveyor (11) and a hole-out slag belt conveyor (22), wherein the head of the TBM main machine belt conveyor is connected with the tail of the rear matching belt conveyor (1), the head of the rear matching belt conveyor (1) is connected with the tail of the continuous belt conveyor (11), the head of the rear matching belt conveyor (1) is located directly above the tail of the continuous belt conveyor (11), the head of the continuous belt conveyor (11) is connected with the tail of the hole-out slag belt conveyor (22), and the head of the continuous belt conveyor (11) is located directly above the tail of the hole-out slag belt conveyor (22), so that the stone slag cut by the TBM cutter is transported to the rear matching belt conveyor (1) of the TBM through the main machine belt conveyor, is short-distance transported through the rear matching belt conveyor (1) of the TBM, falls on the discharging buffer bed (3) of the continuous belt conveyor (11) through a discharging port (4), is long-distance transported to the hole-out slag belt conveyor (22) through the continuous belt conveyor (11), and is transported to a slag field through the hole-out slag belt conveyor (22) with a large slope; The rear matching belt conveyor (1), the continuous belt conveyor (11) and the hole-out slag belt conveyor (22) all comprise a forward belt (12), a return belt (13), a forward roller (9) and a return roller (10), wherein the forward belt (12) is tightly arranged above the forward roller (9), the return belt (13) is tightly arranged above the return roller (10), and the forward belt (12) is located above the return belt (13) and is parallel to the return belt (13) and is equidistant from the return belt (13); The forward belt (12), the forward roller (9), the return belt (13) and the return roller (10) in the rear matching belt conveyor (1) are fixedly connected with a rear matching belt conveyor (1) support frame (32) through bolts, and the rear matching belt conveyor (1) support frame (32) is arranged at the top center of the rear matching trolley; The rear matching belt conveyor (1) further comprises an anti-deviation device (2), a magnetic separator, a discharging port (4) and a driving motor (5), the discharging port (4) is arranged at the head of the rear matching belt conveyor (1), the anti-deviation device (2) is arranged on both sides of the belt edge of the rear matching belt conveyor (1) and is fixedly connected with the belt conveyor support frame (32), the driving motor (5) is arranged at the head of the rear matching belt conveyor (1), the driving motor (5) drives the belt of the rear matching belt conveyor (1) to rotate, the magnetic separator is arranged on the rear matching belt conveyor (1) and is used for removing iron components in the slag to prevent the belt from being scratched, and the magnetic separator is arranged on the rear matching belt conveyor (1); The forward belt (12), the forward roller (9), the return belt (13) and the return roller (10) in the continuous belt conveyor (11) are fixedly connected with a belt conveyor support frame (32) through bolts, and the continuous belt conveyor (11) support frame (32) is suspended above the hole top through mortar anchor rods and a circular ring guide chain (8); in the small-radius curve section of the continuous belt conveyor (11), an adjustable bolt (33) and an adjustable crank arm (34) are arranged between the bottom of the forward roller (9) and the belt conveyor support frame (32); the anti-deviation device (2) is arranged at the belt edge at intervals in the direction close to the curve inner diameter; The continuous belt conveyor (11) head is provided with a continuous belt conveyor driven roller (6), a tensioning roller, a discharging buffer bed (3), and a deviation preventing device (2); The diameter of the continuous belt conveyor driven roller (6) is greater than that of the tensioning roller, the belt rotates around the continuous belt conveyor driven roller (6) when passing through the continuous belt conveyor driven roller (6) to change the direction, the tensioning roller is beside the continuous belt conveyor driven roller (6) and contacts the outer side of the belt, the contact surface of the tensioning roller extrudes the belt to make the belt tensioned, the deviation preventing device (2) is arranged at a certain distance on both sides of the belt edge and is fixed with the belt conveyor support frame (32), and the discharging buffer bed (3) is arranged below the discharging port (4) of the rear matched belt conveyor (1); The middle part of the continuous belt conveyor (11) is provided with a middle part driving device, the middle part driving device comprises X driving wheels (20), M variable frequency driving motors (21), and a cleaning device, wherein X=M, the middle part driving device is installed at a position of N kilometers away from the hole to reduce the tension generated by the long distance belt during starting, running and stopping, and N≥5; The head of the continuous belt conveyor (11) is provided with a hole outer slag turning belt conveyor driven roller (18), a head driving device (27), and a cleaning device; The hole outer slag turning belt conveyor driven roller (18) is located at the tail of the hole outer slag turning belt conveyor (22), the hole outer slag turning belt conveyor driven roller (18) is wrapped by the discharging port (4) of the continuous belt conveyor (11) above, and the head driving device (27) is installed between the belt storage bin and the hole outer slag turning belt conveyor; The outgoing belt (12), the outgoing roller (9), the return belt (13) and the return roller (10) in the hole outer slag turning belt conveyor (22) are fixed with the belt conveyor support frame (32) through steel members and bolts, and the support frame (32) of the hole outer slag turning belt conveyor (22) is supported on the steel plate support surface of the heat preservation shed through the steel truss (31); The heat preservation shed of the hole outer slag turning belt conveyor (22) is wrapped with rock wool insulation boards (30) on three sides, a steel plate bottom surface is arranged at the bottom of the heat preservation shed, a plurality of steel trusses (31) are arranged at the bottom of the heat preservation shed, each steel truss (31) is spaced apart by Y centimeters to support and adjust the longitudinal slope, Y is a natural number greater than zero, Y heat supply and heat preservation devices (36) are arranged inside the heat preservation shed, and a solar panel (37) is fixedly installed at the top of the heat preservation shed to provide electric energy for the heat supply device; The hole outer slag turning belt conveyor (22) adopts a head driving device (27), the head driving device (27) comprises a variable frequency driving motor (21) and a slag turning belt conveyor driving wheel (26), the head driving device (27) is stably connected with the expanded concrete foundation through the steel truss (31), and the rigidity of the foundation itself is utilized to overcome the tension of the large slope belt; The hole outer slag turning belt conveyor (22) adopts a heavy hammer tensioning (35) mode, which comprises Z tensioning rollers and Z heavy hammers, and Z≥2.

2. The continuous belt conveyor device for discharging slag of a TBM tunneling in cold regions according to claim 1, characterized in that, The belt storage bin is installed in the hole, and includes two mobile trolleys and a fixed trolley (17) with front and rear end P-layer rollers (23), a belt storage frame, a belt dragging trolley slide, a tensioning device and a cleaning device.

3. The continuous belt conveyor slagging device for TBM tunneling in cold regions according to claim 2, characterized in that, One end of the belt storage bin is provided with a vulcanization table, when the belt in the belt storage bin is released, the mobile trolley approaches the fixed trolley (17), and the newly added belt is connected with the main belt on the vulcanization table, and with the resetting of the mobile trolley, the new belt roll is stored in the belt bin.

4. The continuous belt conveyor slagging device for TBM tunneling in cold regions according to claim 3, characterized in that, The tensioning device includes a variable frequency starting winch (14) and a wire rope, and a pulley block (16), the variable frequency starting winch can be adjusted according to the real-time force of the belt, to ensure that the belt is in a constant pre-tension state, and to ensure that the belt tension is in a balanced state during the TBM tunneling process, and the balance and synchronization of the belt tension of the whole belt conveyor are realized through a PLC control system.

5. The continuous belt conveyor device for discharging slag of a TBM tunneling in cold regions according to claim 1 or 2, characterized in that, The cleaning device is an infrared radiation switch (24) which is installed obliquely on the top surface of the outgoing belt (12) and emits an infrared light beam, when the residual stone in the belt top surface blocks the infrared light beam after the slag is unloaded, the infrared switch is touched at this time, so as to start the cleaning device, and several water curtain nozzles (25) spray water to form a water curtain to clean the residual stone in the belt.

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