A centralized unloading conveyor for bidirectional excavation and opposite operation

Abstract

The present invention discloses a centralized unloading conveyor for bidirectional tunneling with opposite directions, comprising a first tail device, a second tail device, a cross-belt turning device, a drive device, and a centralized unloading device; the first tail device and the second tail device are respectively connected to the tails of the tunneling machines on both sides; the cross-belt turning device is arranged on the return section of the conveyor belt to cross-turn the conveyor belt. After the turning and redirection, the conveyor belt is redirected again through the centralized unloading device and the tail, forming a closed loop connection, so that the same conveyor belt runs in opposite directions; the centralized unloading device is arranged at the intersection of the opposite running directions of the conveyor belts. During the return journey of the conveyor belt, the material on the bearing surfaces of the conveyor belts at both ends is transported to the unloading chute of the centralized unloading device for unified unloading. This solution can realize the same conveyor belt running in opposite directions on both sides, greatly improving the efficiency of tunneling.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and in particular to a centralized unloading conveyor for bidirectional excavation and opposite operation. Background Art

[0002] Comprehensive mechanized rapid excavation technology has been widely used in the construction of inclined tunnels (holes), pipelines, etc. in transportation, municipal administration, water conservancy, water supply, and gas supply. There are currently a large number of successful cases of using comprehensive mechanized excavation followed by continuous conveyors for tunnel construction and large-slope coal mine inclined shaft construction.

[0003] Some tunnels are excavated from the intersection of the main and branch tunnels to both sides of the branch tunnel. The continuous conveyors currently available on the market for mechanical tunneling can only meet one-way tunneling requirements. The slag needs to be transported to the waste dump through the branch tunnel using multiple continuous conveyors, and it is impossible to take into account the slag discharge from both excavation working faces at the same time, thus greatly reducing the excavation efficiency.

[0004] It can be seen that how to improve tunneling efficiency is a problem that needs to be solved in this field. Summary of the Invention

[0005] In view of the technical problem that the existing unloading conveyor cannot take into account the slag discharge of two excavation working faces at the same time, thereby greatly reducing the excavation efficiency, the purpose of the present invention is to provide a centralized unloading conveyor for bidirectional excavation running in opposite directions, which can meet the simultaneous slag discharge needs of bidirectional excavation through a belt conveyor, thereby greatly improving the excavation efficiency.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a centralized unloading conveyor for bidirectional excavation and opposite operation, comprising a first tail device, a second tail device, a cross-belt turning device, a driving device and a centralized unloading device; the first tail device and the second tail device are respectively connected to the tails of the excavators on both sides of the branch tunnel; the cross-belt turning device is arranged in the return section of the conveyor belt to cross-flip the conveyor belt, and after the flipping and redirection, the conveyor belt is redirected again through the centralized unloading device and the tail to form a closed loop connection, forming the same conveyor belt running in opposite directions; the centralized unloading device is arranged at the intersection of the opposite running directions of the conveyor belts, and when the conveyor belts return, the materials on the bearing surfaces of the conveyor belts at both ends are transported to the centralized unloading device for unified unloading.

[0007] Furthermore, the centralized unloading device is arranged at the intersection of the opposite running directions of the conveyor belts, and it includes a first head frame, a second head frame and a head unloading chute; the first head frame and the second head frame are arranged on both sides of the head unloading chute and are connected to the head unloading chute, and the conveyor belts running in opposite directions for transporting materials are centralized and unloaded into the head unloading chute through the first head frame and the second head frame.

[0008] Furthermore, a driving device is provided on the first head frame or the second head frame; the output shaft end of the driving device is connected to the transmission roller on the conveyor, driving the transmission roller to rotate, thereby providing driving force for the opposite excavation conveyors.

[0009] Furthermore, the bidirectional excavation opposite-running centralized unloading conveyor is also equipped with an inclined shaft continuous conveyor; the inclined shaft continuous conveyor is vertically installed above the cross-belt device relative to the bidirectional excavation opposite-running centralized unloading conveyor, and the slag from the opposite-running conveyor is transported to the inclined shaft continuous conveyor by the head unloading chute for delivery.

[0010] Furthermore, the cross-turning device includes a belt entrainment device frame, a belt entrainment separator and a belt entrainment device; the belt entrainment separator is vertically arranged in the middle of the cross-turning device relative to the bottom surface; the belt entrainment device frame is cooperatively connected with the belt entrainment device and is horizontally arranged on both sides of the belt entrainment separator relative to the bottom surface.

[0011] Furthermore, the entrainment and separation device includes a vertical rod support, two side vertical rods and a central separation vertical rod; the vertical rod support is arranged in the return section of the conveyor belt; the two side vertical rods are respectively arranged on both sides of the central separation vertical rod and are installed side by side with the central separation vertical roller in the vertical roller support, and the two side vertical rods cooperate with the central separation vertical rod to form two transmission channels for the conveyor belts to pass vertically relative to the ground.

[0012] Furthermore, the entrainment device frame is cooperatively connected with the entrainment device and is respectively arranged on the upper and lower sides of the conveyor belt, forming a transmission channel for the conveyor belt to pass horizontally relative to the ground.

[0013] Furthermore, a redirecting frame is provided between the first tail device and the second tail device and the cross-belt turning device, and the redirecting frame is equipped with an upper redirecting roller and a lower redirecting roller. The conveyor belts on the first tail device and the second tail device pass around the transmission rollers matched with the first head frame and the second head frame, and then pass through the upper redirecting roller on the redirecting frame and go around to the lower redirecting roller to reach a suitable height, and then pass into the clamping device, and after turning the belt, connect with the second tail and the first tail.

[0014] This solution provides a centralized unloading conveyor for bidirectional excavation running in opposite directions. By arranging a cross-belt turning device at the intersection of the conveyor belts facing each other at the excavation surfaces at both ends, the direction of the facing conveyor belts is made consistent with the running direction of the conveyor belts of the opposite conveyor, so that the same conveyor belt can run in opposite directions on both sides. The requirements of bidirectional excavation and simultaneous slag discharge are met by a single belt conveyor, which greatly improves the efficiency of excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1This is the overall structural diagram of the unloading conveyor;

[0017] Figure 2 This is a schematic diagram of the layout structure of the unloading conveyor;

[0018] Figure 3 This is a schematic diagram of the material conveying direction of this discharge conveyor;

[0019] Figure 4 This is a schematic diagram of the belt storage bin and automatic tensioning device of the unloading conveyor;

[0020] Figure 5 This is a schematic diagram of the tail device of this unloading conveyor;

[0021] Figure 6 This is a schematic diagram of the assembly structure of the unloading device of the unloading conveyor;

[0022] Figure 7 This is a structural diagram of the unloading device of the unloading conveyor;

[0023] FIG8 is a schematic diagram of the structure of the discharge chute of the discharge conveyor;

[0024] Figure 9 is a schematic diagram of the cross-belt turning device of the unloading conveyor;

[0025] Figure 10 This is a schematic diagram of the installation structure of the belt turning device of the unloading conveyor;

[0026] Figure 11 This is a schematic diagram of the installation of the retractable belt device and vulcanizing platform of this unloading conveyor.

[0027] The following is a description of the components in the accompanying drawings:

[0028] 1. First tail device 2. Automatic tensioning device 3. Belt storage device 4. Cross-belt turning device 5. Centralized unloading device 6. Second tail device 7. Second headstock 8. First headstock 9. Driving device 10. Belt entrainment device frame 11. Redirection device frame 12. Belt entrainment device 13. Belt entrainment and separation device 14. Tensioning device 15. Belt storage bin 16. Tail trolley 17. Unloading chute 18. Inclined shaft continuous conveyor 19. Belt retracting and unwinding device 20. Vulcanizing platform DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0030] In view of the technical problem that the existing unloading conveyor cannot take into account the slag discharge of two excavation working faces at the same time, thereby greatly reducing the excavation efficiency, based on this technical problem, the present invention provides a centralized unloading conveyor for bidirectional excavation running in opposite directions. It arranges a cross-belt turning device at the intersection of the conveyor belts facing each other at the two end excavation faces, so that the direction of the facing conveyor belts is consistent with the running direction of the conveyor belts of the opposite conveyor, so that the same conveyor belt can run in opposite directions on both sides, and the simultaneous slag discharge requirements of bidirectional excavation can be met by a belt conveyor, thereby greatly improving the excavation efficiency.

[0031] The present invention provides a centralized unloading conveyor for bidirectional excavation, see Figure 1-Figure 3 It includes two sets of tail devices, an automatic tensioning device 2, a belt storage device 3, a cross-belt turning device 4 and a centralized unloading device 5.

[0032] The tape storage device 3 is used for storing tapes in a continuous conveyor. The tape storage device 3 in this solution adopts a traditional S-shaped winding method. The tape storage device 3 includes a tape storage bin 15 and a tape storage bogie.

[0033] See also Figure 4 Belt storage bogies are installed on both sides of each belt storage bin 15, and redirecting rollers are installed on the belt storage bogies. The conveyor belt is arranged along the belt storage bin 15 and can be folded into multiple layers through the redirecting rollers to form a belt storage structure. The two sides of the conveyor belt are connected to the two sets of tail devices in opposite directions, which can realize the circular transmission of the conveyor belts on the two tail devices.

[0034] In addition, the belt storage device 3 is cooperatively connected with the automatic tensioning device 2, and the automatic tensioning device 2 and the belt storage device 3 are connected by a steel wire rope.

[0035] The automatic tensioning device 2 includes a tensioning device 14 and a tension monitoring device.

[0036] The tensioning device 14 comprises a tensioning wheel frame and a tensioning drive gallows. The tensioning drive gallows is equipped with a drive motor and a retractable rope drum. A wire rope is wound around the retractable rope drum, and the motor rotates to tighten and loosen the wire rope. The wire rope passes through the tensioning wheel frame and a pulley assembly on the active end belt storage bogie, connecting the tensioning drive gallows to the belt storage bin 15. The tension monitoring device monitors the tension of the conveyor belt during operation. The tension monitoring device monitors the tension of the conveyor belt, and feedback signals from the monitoring device control the direction of the motor, tightening and loosening the wire rope to control the tension and tension of the conveyor belt.

[0037] If the tension monitoring detects that the tension of the conveyor belt is greater than the threshold range specified by the tension, the tensioning device loosens the wire rope, and the movable end storage bin bogie moves in the direction away from the tensioning device, thereby loosening the conveyor belt of the storage bin 15, thereby preventing the conveyor belt from breaking due to excessive tension; if the tension monitoring detects that the tension of the conveyor belt is less than the threshold range specified by the tension, the tensioning device tightens the wire rope, and the movable end storage bin bogie moves in the direction of the tensioning device, thereby tightening the conveyor belt of the storage bin 15, thereby preventing the conveyor belt from being too loose and falling off the roller.

[0038] By setting up the automatic tensioning device 2, dynamic monitoring of the conveyor tension can be achieved during the operation of the conveyor to automatically adjust the tension force and the tension degree of the belt conveyor, ensuring that the conveyor can operate stably under different working conditions.

[0039] It should be noted that the structures and working principles of the belt storage device 3 and the automatic tensioning device 2 are well known to those skilled in the art and will not be described in detail here.

[0040] At the same time, the belt storage device 3 in this solution preferably adopts the traditional S-shaped winding method, which has the advantage of a lower height and can reduce the space occupied by the conveying mechanism. However, this solution is not limited to the S-shaped winding method, and a circular winding method or an incremental tower structure can also be adopted, and the specific method can be determined according to actual conditions.

[0041] Further, see Figure 5 The two sets of tail devices include a first tail device 1 and a second tail device 6, which are respectively connected to the tails of the two roadheaders on the left and right sides of the roadway or tunnel. The two sets of tail devices have the same structure and respectively include a tail trolley 16 and a tail frame, and the tail frame is cooperatively connected to the tail trolley 16.

[0042] Pipe segments are laid on the tail frame, and a grooved roller group is installed to connect the laid pipe segments.

[0043] The conveying ends of the conveyor belts at both ends of the belt storage bin 15 are arranged on the groove roller group through two groups of tail devices, and the transmission and transportation of the conveyor belts are realized by the groove rollers.

[0044] After the conveyor belt passes around the head drive roller, it is redirected by the redirecting device and connected to the cross-belt turning device 4. The cross-belt turning device 4 turns the left and right return conveyor belts 180 degrees each and then connects to the tail redirecting roller of the machine, so that the same conveyor belt runs in opposite directions; the conveyor belt that passes around the redirecting roller and the return conveyor belt on the other side form a double-layer conveyor belt.

[0045] See also Figure 6- Figure 8, the centralized unloading device 5 is set at the intersection of the conveyor belts in opposite running directions. It is used to concentrate the materials from the two routes for unloading. It consists of a first head frame 8, a second head frame 7 and a head unloading chute 17.

[0046] The first head frame 8 and the second head frame 7 are used to carry materials on the two conveyor belts respectively;

[0047] The first head frame 8 and the second head frame 7 are arranged on both sides of the head unloading chute 17 and are connected to the head unloading chute 17. The conveyor belts running in opposite directions for transporting materials are passed through the transmission rollers of the first head frame 8 and the second head frame 7, and the slag on the conveyor belts is concentrated to the center through the head unloading chute 17 to complete the unloading.

[0048] Furthermore, a mounting position for the driving device 9 is reserved on the first head frame 7 , and the driving device 9 is fixedly connected to the first head frame 7 .

[0049] The output shaft end of the driving device 9 is connected to the transmission roller on the conveyor to drive the transmission roller to rotate and provide driving force for the opposite excavation conveyor.

[0050] The bidirectional excavation opposite-running centralized unloading conveyor is also equipped with an inclined shaft continuous conveyor 18; the inclined shaft continuous conveyor 18 is vertically installed above the cross-belt turning device 4 relative to the bidirectional excavation opposite-running centralized unloading conveyor, and the slag of the opposite-running conveyor is transported to the inclined shaft continuous conveyor 18 by the head unloading chute 17 and sent out.

[0051] When the conveyor belt unloads the material to the head unloading chute 17, it returns through the cross-belt turning device 4. The cross-belt turning device 4 is set in the middle of the two groups of tail devices. By turning the conveyor belts on the two groups of tail devices through the cross-belt turning device 4, the two groups of tail devices can be turned towards each other.

[0052] For details, see Figure 9- Figure 10 The cross-belt turning device 4 is arranged at the return section of the conveyor belt, which includes a belt entrainment device frame 10, a belt entrainment separation device 13, and a belt entrainment device 12.

[0053] The entrainment and separation device 13 is installed on the second head frame 7. The entrainment and separation device 13 can separate the two cross belts to prevent the conveyor belt from interfering during the belt turning process.

[0054] The belt entrainment and separation device 13 is arranged in the middle of the cross-belt turning device 4, and includes a vertical roller support, two side vertical rollers and a central separation vertical roller.

[0055] The vertical roller support is installed on the second head frame 7, and the side vertical rollers are arranged on both sides of the central dividing vertical rod and are installed side by side with the central dividing vertical roller in the vertical roller support. The two side vertical rods cooperate with the central dividing vertical rod to form two transmission channels for the conveyor belts to pass vertically relative to the ground.

[0056] The two layers of cross conveyor belts pass through the gaps between the side vertical rollers and the center separation vertical roller respectively. The distance between the side vertical rollers and the center separation vertical roller is adjusted to clamp the conveyor belts on both sides so that the conveyor belt surface is perpendicular to the ground. Since the diameter of the center separation vertical roller is large, it plays the role of separating the conveyor belts.

[0057] In addition, the entrainment device frame 10 is located on both sides of the entrainment separator 13, and is respectively arranged at the upper and lower ends of the two layers of conveyor belts in conjunction with the entrainment device 12. The conveyor belt is clamped by the entrainment device 12 so that the conveyor belt surface is parallel to the ground.

[0058] Specifically, the double-layer conveyor belt is clamped by the tail of one side through the entrainment device 12 arranged on the entrainment device frame 10 at the upper and lower ends of the conveyor belt. At this time, the conveyor belt is parallel to the ground. During the transmission process, when it reaches the middle of the cross-belt turning device 4, the cross conveyor belt is turned 90° from parallel to the ground and passes through the gaps on both sides of the entrainment dividing device 13. At this time, the conveyor belt surface is 90° perpendicular to the ground, and then the conveyor belt continues to turn 90° to pass through the entrainment device 12 on the other side, and the conveyor belt is parallel to the ground again and turned 180°.

[0059] At the same time, the bearing surface of the load-bearing section on one side of the oppositely running conveyor is flipped 180° to be parallel to the ground and is in the return stage and connected to the tail of the other side. The unused surface of the conveyor belt becomes the bearing surface of the load-bearing section on the other side. This ensures that both belt surfaces of the conveyor belt are fully utilized, extending the service life of the conveyor belt during opposite-way transportation.

[0060] In addition, this solution preferably keeps the bearing surface on the bearing section facing upwards during the return section in the cross-belt flipping type at both ends of the conveyor belt. After the return section is cleaned with an added sweeper, the pollution of the ground by sticky materials on the conveyor belt in the return section can be greatly reduced, thereby ensuring a clean environment and reducing manual cleaning.

[0061] At the same time, a redirecting frame is set between the first tail device 1, the second tail device 6 and the cross-belt turning device 4. The redirecting frame is equipped with an upper redirecting roller and a lower redirecting roller. After the conveyor belt passes around the drive rollers on the head frames on both sides of the centralized unloading device, it passes through the upper redirecting roller on the redirecting frame and goes around to the lower redirecting roller to reach a suitable height. After that, it passes through the cross-belt turning device and connects to the tail after turning the belt.

[0062] The conveyor belt passes around the redirecting roller on the redirecting device frame. Firstly, the running direction of the conveyor belt is changed during the return trip to ensure the realization of the conveyor running in opposite directions. Secondly, there is a height difference between the upper redirecting roller and the lower redirecting roller. This height difference determines the value of the conveyor belt surface height drop, which reserves enough space for the installation of the main inclined shaft conveyor.

[0063] See also Figure 11As excavation progresses, the conveyor tail extends forward. When the conveyor belt reaches a certain length, it needs to be lengthened and cut. The belt retractor moves along the track. When the center line coincides with the center line of the conveyor, the belt retractor 19 unwinds the cut conveyor belt and connects it to the newly added conveyor belt on the vulcanization platform 20 for vulcanization. After unwinding, the belt retractor 19 slides along the track to a safe position to avoid collision with the conveyor.

[0064] The above-mentioned scheme for bidirectional tunneling and opposite-direction centralized unloading conveyor has the following advantages over the prior art:

[0065] (1) A belt conveyor is used to meet the requirements of simultaneous slag discharge in both directions of excavation, which can reduce the use of equipment such as the electronic control system, belt storage device, and tensioning device, thereby improving excavation efficiency while saving production costs and reducing energy consumption. In addition, the slag is discharged by sharing a single discharge chute. The designed discharge chute is smooth and does not block, stick, or generate dust. Its design is reasonable, and its strength and rigidity meet the requirements of various working conditions.

[0066] (2) The automatic tensioning device used in this scheme can realize self-controlled tensioning, realize dynamic monitoring of the conveyor tension during the operation of the conveyor to achieve automatic adjustment of the tensioning force, and automatically adjust the tension level of the belt conveyor, which can ensure the stable operation of the conveyor under different working conditions.

[0067] (3) This solution designs a cross-belt turning device that can meet the installation requirements of a small space. It can turn the left and right return conveyor belts 180 degrees to ensure that the same conveyor belt can run in opposite directions on both sides. At the same time, by turning and cleaning the conveyor belt, the conveyor belt surface is rationally utilized, thereby extending the service life of the bidirectional conveyor belt.

[0068] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A centralized unloading conveyor for bidirectional excavation and opposite operation, characterized in that: It includes a first tail device, a second tail device, a cross-belt turning device, a driving device and a centralized unloading device; the first tail device and the second tail device are respectively connected to the tails of the tunnel boring machines on both sides; the cross-belt turning device is arranged on the return section of the conveyor belt to cross-flip the conveyor belt, and after flipping and redirecting, the conveyor belt is redirected again through the centralized unloading device and the tail to form a closed loop connection, forming the same conveyor belt running in opposite directions; the centralized unloading device is arranged at the intersection of the opposite running directions of the conveyor belts, and when the conveyor belt returns, the materials on the bearing surfaces of the conveyor belts at both ends are transported to the centralized unloading device for unified unloading; the cross-belt turning device includes a belt entrainment device frame, a belt entrainment separator and a belt entrainment device; the belt entrainment separator is vertically arranged at the middle of the cross-belt turning device relative to the bottom surface; after the belt entrainment device frame is matched with the belt entrainment device, it is horizontally arranged on both sides of the belt entrainment separator relative to the bottom surface.

2. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 1 is characterized in that: The centralized unloading device is arranged at the intersection of the opposite running directions of the conveyor belts, and includes a first head frame, a second head frame and a head unloading chute; the first head frame and the second head frame are arranged on both sides of the head unloading chute and are connected to the head unloading chute, and the conveyor belts running in opposite directions for transporting materials are centrally unloaded into the head unloading chute through the first head frame and the second head frame.

3. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 2 is characterized in that: The first head frame or the second head frame is equipped with a driving device; the output shaft end of the driving device is connected to the transmission roller on the conveyor, driving the transmission roller to rotate and provide driving force for the opposite excavation conveyors.

4. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 1 is characterized in that: The bidirectional excavation opposite-running centralized unloading conveyor is also equipped with an inclined shaft continuous conveyor; the inclined shaft continuous conveyor is vertically installed above the cross-belt turning device relative to the bidirectional excavation opposite-running centralized unloading conveyor, and the slag of the opposite-running conveyor is transported to the inclined shaft continuous conveyor by the head unloading chute for delivery.

5. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 1 is characterized in that: The entrainment and separation device includes a vertical stick support, two side vertical sticks and a central separation vertical stick; The vertical rod support is arranged in the return section of the conveyor belt; the two side vertical rods are respectively arranged on both sides of the central dividing vertical rod and are installed side by side with the central dividing vertical roller in the vertical roller support, and the two side vertical rods cooperate with the central dividing vertical rod to form two transmission channels for the conveyor belts to pass vertically relative to the ground.

6. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 1 is characterized in that: The entrainment device frame is cooperatively connected with the entrainment device and is respectively arranged on the upper and lower sides of the conveyor belt, forming a transmission channel for the conveyor belt to pass horizontally relative to the ground.

7. The centralized unloading conveyor for bidirectional excavation and opposite operation according to claim 1 is characterized in that: A redirecting frame is provided between the first tail device and the second tail device and the cross-belt turning device, and the redirecting frame is equipped with an upper redirecting roller and a lower redirecting roller. The conveyor belts on the first tail device and the second tail device pass around the transmission rollers matched with the first head frame and the second head frame, and then pass through the upper redirecting roller on the redirecting frame and go around to the lower redirecting roller to reach a suitable height, and then pass into the clamping device, and after turning the belt, connect with the second tail and the first tail.

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