Continuous belt vulcanization method

Abstract

The present invention discloses a continuous belt vulcanization method, which includes the following steps: S1, position the belt and perform vulcanization operation; S3, while performing the vulcanization operation, the belt storage device provides the belt to enable the tail device to move forward synchronously with the TBM tunneling, and control the second roller to rise so that the upper belt transports materials at a predetermined speed; S4, when the vulcanization is completed, the TBM stops, release the clamping device 1 and the clamping device 2, and start the belt changing device to pull all the vulcanized whole roll of belt into the belt storage device; S5, control the lifting platform and the lifting rod to maintain the state after vulcanization is completed, perform normal tunneling operation until the stored belt in the belt storage device is consumed to a predetermined threshold, and control the second roller to descend for re-storing the belt. The present invention has the beneficial effect of reducing the downtime in the tunneling section or even achieving non-stop operation.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction. More specifically, the present invention relates to a continuous belt vulcanization method. Background Art

[0002] The continuous belt conveyor is the main equipment of the slag discharging system in TBM (tunnel boring machine) construction, and usually includes a main drive, a moving tail section, a belt, a belt storage bin, a vulcanizing table, etc. While the TBM is advancing forward, the belt storage bin continuously releases the belt outward, so that the extension of the continuous belt conveyor meets the requirement of the increased depth of tunnel construction. Due to the limited belt storage capacity of the belt storage bin, the belt needs to be vulcanized once every certain distance (200 - 250m) of tunneling to add a new roll of belt to the continuous belt conveyor to meet the continuous slag discharging operation of the TBM. During the vulcanization process, since the original belt needs to be cut and a new belt is added, the transportation channel of the entire belt conveyor is cut off and the machine stops, that is, the traditional vulcanization operation is a stop operation, which has the problems of reducing the project progress and increasing the capital investment. The patent with the application number 201810204466.1 and the name of a method for extending the TBM non-stop vulcanization of the continuous belt conveyor in the TBM sliding section discloses that when the TBM slides, the belt is pulled by the tail roller, the lower belt of the continuous belt conveyor is dragged by the tail roller, and the lower belt is pulled out from the belt storage bin. During the pulling process, the upper belt does not move, and the lower belt slides into the tunnel on the lower idler and outputs the extension amount for the upper belt, realizing the non-stop vulcanization operation; however, since the crushed stones and the like need to be continuously transported out of the tunnel during the tunneling section, this method is not applicable to the tunneling section. How to design a vulcanization operation method to reduce the downtime in the tunneling section or even achieve non-stop operation, and then reduce the impact on the project progress and capital investment caused by the vulcanization shutdown is an urgent problem to be solved at present. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0004] Another object of the present invention is to provide a continuous belt vulcanization method to reduce the downtime in the tunneling section or even achieve non-stop operation, and then reduce the impact on the project progress and capital investment caused by the vulcanization shutdown.

[0005] To achieve these objects and other advantages according to the present invention, a continuous belt vulcanization method is provided, including the following steps:

[0006] Including the following steps:

[0007] S1. Set up a continuous belt conveyor: The continuous belt conveyor successively includes a head discharging device, a tape take-up and pay-off device, a first positioning device, a first vulcanizing device, a tape changing device, a second vulcanizing device, a second positioning device, a tape storage device, and a tail device along the direction of the tunnel depth increase by winding the belt. Among them, the tape take-up and pay-off device includes a plurality of first rollers arranged above the belt and spaced longitudinally along the belt, and second rollers arranged between any adjacent first rollers and below the belt. Each second roller is vertically movable.

[0008] S2. Vulcanize the belt joints in the tunneling section: The first positioning device and the second positioning device respectively work to position the belt, and the first vulcanizing device and the second vulcanizing device respectively perform vulcanization operations on the two ends of the belt added through the tape changing device and the original belt joints.

[0009] S3. While performing the vulcanization operation, the tape storage device provides the belt to enable the tail device to move forward synchronously with the TBM tunneling, and controls the second roller to rise so that the upper belt transports materials at a predetermined speed.

[0010] S4. Store the tape: When the vulcanization is completed, the TBM stops, the clamping device 1 and the clamping device 2 are released, and the tape changing device is started to pull all the vulcanized whole roll of belt into the tape storage device.

[0011] S5. Control the lifting platform and the lifting rod to maintain the state after the vulcanization is completed, perform normal tunneling operations until the tape stored in the tape storage device is consumed to a predetermined threshold, and control the second roller to descend for re-storing the tape.

[0012] Preferably, the bottom height of the first roller is equal to the top height of the belt clamped by the first positioning device.

[0013] Preferably, a lifting platform is arranged below all the second rollers, and lifting rods are respectively arranged at both ends of each second roller corresponding to the top of the lifting platform. Among them, when the lifting platform and the lifting rods are both shortened to the shortest, the top height of the second roller is lower than the bottom height of the belt of the first positioning device.

[0014] Preferably, the tail device moves forward synchronously with the TBM tunneling, and the adjustment of the second roller to rise specifically is:

[0015] The lifting platform rises, and a plurality of second rollers rise synchronously to upwardly pull the lower belt, thereby driving the belt to transport while storing the transported belt. When the lifting platform rises to the highest point, the lifting platform stops working;

[0016] Along the direction away from the vulcanization platform, the lifting rods work successively to drive the corresponding second rollers to move up to the highest point, thereby driving the belt to transport while storing the transported belt until the vulcanization is completed or all the second rollers move up to the high end, and the lifting rods stop working.

[0017] Preferably, the lifting table includes a lifting mechanism and a lifting top plate provided at the top of the lifting mechanism.

[0018] Preferably, the lifting rod passes through and is fixed to the lifting top plate.

[0019] Preferably, the storage length of the belt winding and unwinding device is not less than the transmission length of the belt during the vulcanization time.

[0020] Preferably, the control of the second roller to descend in step S5 is specifically as follows:

[0021] In the direction away from the vulcanization platform, the lifting rod works in sequence to drive the corresponding second roller to move down to the lowest point. Then, the lifting table descends, so that multiple second rollers further descend synchronously, gradually releasing and storing the belt into the belt storage device.

[0022] The present invention has at least the following beneficial effects:

[0023] Through the setting of the belt winding and unwinding device, the operation without stopping during the vulcanization process in the tunneling section is realized, and the effective tunneling efficiency of the TBM tunneling machine is improved. Specifically:

[0024] (1) During the vulcanization and tunneling stage, the belt winding and unwinding device can store the belt quantity required for belt transmission. Further, this part of the belt quantity can be stored into the belt storage device again without affecting the belt supply capacity of the belt storage device in the early stage, and thus does not affect the normal tunneling work in the tunneling section. Furthermore, the belt quantity stored again can be used to provide the extension quantity requirement in the final tunneling stage, which is equivalent to reducing the vulcanization operation once as a whole and further improving the effective tunneling efficiency;

[0025] (2) The belt winding and unwinding device is set to have two-stage lifting including a lifting table and a lifting rod. The lifting table can lift the belt synchronously relative to the first roller at the initial stage of storage, and then cooperate with the two first rollers at the ends to realize the positioning of the belt guidance, improve the stability of belt transmission, and reduce the damage to the belts on both sides of the belt winding and unwinding device due to lifting; further, the lifting rod is used for step-by-step lifting to minimize the influence on the stored and unreleased belts during the storage and release processes as much as possible, and improve the convenience of storage and release;

[0026] (3) The lifting rod passes through and is fixed to the lifting top plate, reducing the storage height when the lifting top plate cooperates with the lifting rod for storage, reducing the occupation of the longitudinal distance, and enhancing the storage capacity of a single lifting rod for the belt.

[0027] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1Schematic diagram of the structure of the continuous belt conveyor according to one of the technical solutions of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the tape winding and unwinding device according to one of the technical solutions of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the tape winding and unwinding device according to one of the technical solutions of the present invention.

[0031] The reference numerals are specifically as follows: head unloading device 1; tape winding and unwinding device 2; first roller 20; second roller 21; lifting table 22; lifting mechanism 220; lifting top plate 221; lifting rod 23; first positioning device 3; first vulcanizing device 4; tape changing device 5; second vulcanizing device 6; second positioning device 7; belt 8; upper belt 80; lower belt 81. Detailed implementation manners

[0032] The following further describes the present invention in detail with reference to embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0033] <Solution 1>

[0034] As Figures 1-3 shown, taking the continuous belt vulcanization operation of the auxiliary haulage main roadway TBM as an example, the continuous belt vulcanization method includes the following steps:

[0035] S1. Set up the continuous belt conveyor: The continuous belt conveyor sequentially includes along the direction of deepening of the tunnel depth:

[0036] ①. The head unloading device 1, which is located at the right end as Figure 1 described, and can adopt the way of unloading with a probe roller. The transported materials are unloaded through the head unloading device 1.

[0037] ②. Tape winding and unwinding device 2, which includes a plurality of first rollers 20 arranged above the belt 8 and longitudinally spaced along the belt 8, and a second roller 21 arranged between any adjacent first rollers 20 and below the belt 8. Among them, the plurality of first rollers 20 are fixedly arranged in the height direction, that is, the first roller 20 itself is rotatably arranged along its axis. The bottom height of the first roller 20 is equal to the top height of the belt 8 clamped by the first positioning device 3 (the first positioning device 3 clamps the corresponding belt 8 in place without changing the transmission height of the belt 8 itself). During use, through the setting of the tape winding and unwinding device 2, the operation without stopping during the vulcanization process in the tunneling section is realized, improving the effective tunneling efficiency of the TBM tunneling machine. Specifically: During the vulcanization tunneling stage, the tape winding and unwinding device 2 can store the amount of belt required for the transmission of the belt 8. Further, this part of the belt amount can be stored in the tape storage device again without affecting the previous belt supply capacity of the tape storage device, and thus does not affect the normal tunneling work in the tunneling section. Further, the belt amount stored again can be used to provide the extension amount required in the final tunneling stage, which is equivalent to reducing the vulcanization operation once, and further improving the effective tunneling efficiency;

[0038] Each second roller 21 is vertically movable. Specifically: A lifting platform 22 is arranged below all the second rollers 21. The top of the lifting platform 22 is correspondingly provided with lifting rods 23 at both ends of each second roller 21, that is, one second roller 21 corresponds to two lifting rods 23, which are respectively arranged at the front end of the second roller 21 to drive the second roller 21 to move up and down relative to the lifting platform 22. The second roller 21 is rotatably arranged along its axis. Further, when the lifting platform 22 and the lifting rods 23 are both shortened to the shortest (at this time, the second roller 21 descends to the lowest), the top height of the second roller 21 is lower than the bottom height of the belt 8 of the first positioning device 3. During use, the tape winding and unwinding device 2 is set with two-stage lifting including the lifting platform 22 and the lifting rods 23. The lifting platform 22 can synchronously lift the belt 8 relative to the first roller at the initial stage of storage, and then cooperate with the two first rollers at the end to realize the positioning of the guiding of the belt 8, improving the stability of the belt 8 transmission, and reducing the damage to the belts 8 on both sides of the tape winding and unwinding device 2 caused by lifting. Further, the lifting rods 23 are used for step-by-step lifting to minimize the impact on the stored and unreleased belts 8 during the storage and release processes, improving the convenience of use for storage and release;

[0039] ②. First positioning device 3, which is used to clamp the corresponding belt 8 passing through in place without changing the transmission height of the belt 8 itself, so as to realize the positioning of the belt 8;

[0040] ③. First vulcanization device 4, which is used to vulcanize one of the joints during the process of adding a new belt;

[0041] ④. Tape changing device 5, which is used to add a new belt;

[0042] ⑤. The second vulcanizing device 6 is used to vulcanize another joint during the process of adding a new belt, and cooperate with the first vulcanizing device 4 to achieve synchronous vulcanization of the two joints;

[0043] ⑥. The second positioning device 7 is used to clamp the corresponding belt 8 passing through in place, without changing the transmission height of the belt 8 itself, to achieve the positioning of the belt 8. Among them, the first positioning device 3 and the second positioning device 7 cooperate to form a stable space to be vulcanized, providing space for the installation work of the first vulcanizing device 4, the belt changing device 5, and the second vulcanizing device 6;

[0044] ⑦. The belt storage device can meet the continuous, fast, and uninterrupted conveying of materials (waste residue) by the continuous belt conveyor, and is used to store the belt 8. Usually, it can store 400 - 600 m of the belt 8, meeting the requirement that the continuous belt conveyor can run continuously for 200 - 300 m without stopping;

[0045] ⑧. The tail device is used to receive materials onto the belt 8 and is installed in cooperation with the tunnel boring machine;

[0046] The above devices are wound around by the belt 8. Along the direction of deepening of the tunnel depth, it is the moving direction of the lower belt 81, and this direction is opposite to the transportation direction of the upper belt 80;

[0047] S2. Set the storage capacity of the storage device to 500 m and the rated tunneling speed to 3.6 m / s. At this tunneling speed, control the lifting platform 22 and the lifting rod 23 to both shorten to the shortest without affecting the operation of the belt 8, and tunnel until the storage capacity reaches the first threshold (the length of this belt 8 meets the tunneling and transportation requirements of the belt 8 during vulcanization);

[0048] S3. When tunneling to the first threshold of the storage capacity, perform the vulcanization operation of the belt joint in the tunneling section. Specifically:

[0049] S3.1. Construction preparation work:

[0050] Dust the area 20 m before and after the vulcanization construction site one day in advance;

[0051] All construction personnel wear clean work clothes and work with gloves;

[0052] Transport the tools and materials used for vulcanization construction to the construction site in advance and place them in appropriate positions;

[0053] Connect the power supply in advance, prepare the complete set of tools and bonding materials (raw glue, thick and thin rubber strips, acetone or xylene, chemical fiber towels, etc.) for vulcanizing the belt 8. Small tools include paper knives, sharp cutting knives, sharpening oilstones, scissors, steel rulers, needle-nose pliers, wire cutters, grinders, etc.; and debug equipment such as the heating plate of the vulcanizer, temperature control switch, and grinder to ensure normal use;

[0054] S3.2, the first positioning device 3 and the second positioning device 7 respectively work to position the belt 8;

[0055] S3.3. Select appropriate locations for the first vulcanizing device 4 and the second vulcanizing device 6 and place them. Vulcanize the belt 8 (500 m) added by the belt changing device 5 between its two ends and the joints of the original belt using the first vulcanizing device 4 and the second vulcanizing device 6, respectively. Specifically, perform the following operations:

[0056] Production of belt joints: The total overlapping length of the two ends of the belt joint should be guaranteed to be 0.8B (B is the belt width), distinguish the front and back sides of the belt 8, cut off the damaged joint with a wallpaper knife, mark and point the joint, peel the belt 8 along the lining cord layer into corresponding steps, and the length of each step is evenly divided according to the number of layers of the belt lining cord layer; the width of the rubber cut each time should be 50mm, so that the rubber can be easily torn off from the cord layer in strips; Among them, to ensure the quality of the fastening, the rubber on the surface of the lining cord layer should be thoroughly removed during peeling, and the surface glue can be carefully polished with a copper wire polishing wheel, and then the surface is carefully cleaned with acetone or xylene. After the liquid evaporates, separate the cleaned tooth joint from the template, place a polyester film (or newspaper) and surface glue on the vulcanizer plate, and spread them evenly;

[0057] Brush a layer of raw glue black slurry evenly on the peeled step surface, let it fully absorb and then brush it again; after it is slightly dried, spread a layer of raw glue densely, and carefully buckle and connect the joints to ensure that the seams are aligned and tightly fitted. There should be no bubbles in the bonding layer. You can use a blade to carefully scratch the raw glue at the bulge, and then press it tightly to leave no gaps;

[0058] Sequentially fasten the vulcanizer pressure plates, tighten the pressure plate bolts evenly, connect the temperature sensor and the heating device, press with a hydraulic press to the specified instrument reading, and simultaneously turn on the heating power supply to perform the automatic vulcanization and curing procedure. When the specified vulcanization temperature is reached, start the timer to keep warm for about 40 minutes. When the holding time is up, the vulcanizer begins to cool down. Usually, the cooling should be slow. When the temperature is below 60°C, the cooling process ends. Remove the first vulcanizer 4 and the second vulcanizer 6, check the joint quality of the vulcanized belt, and after confirmation, clean up the waste from the vulcanizer.

[0059] While the vulcanization operation is being performed, the belt storage device provides the belt 8 to enable the tail device to move forward in synchronization with the TBM excavation, and controls the second roller 21 to rise so that the upper belt 80 can transport materials at a predetermined speed. Specifically:

[0060] The tail unit moves forward in sync with the TBM excavation;

[0061] The synchronous lifting platform 22 rises, and multiple second rollers 21 rise synchronously to upwardly traction the lower belt 81, thereby driving the belt 8 to transmit while storing the transmitted belt 8. When the lifting platform 22 rises to the highest point, the lifting platform 22 stops working;

[0062] Further, along the direction away from the vulcanization platform, the lifting rods 23 work in sequence to drive the corresponding second rollers 21 to move up to the highest point, thereby driving the belt 8 to transmit while storing the transmitted belt 8 until vulcanization is completed or all the second rollers 21 move up to the high end, and the lifting rods 23 stop working. Preferably, the storage length of the tape winding and unwinding device 2 is not less than the transmission length of the belt 8 during the vulcanization time. Among them, on the basis of meeting the synchronous tunneling requirements, the specification of the tape winding and unwinding device 2 can be reduced by reducing the transportation speed of the belt 8 and reducing the vulcanization time, while meeting the transportation requirements for a short period of time;

[0063] Specifically, for the lifting platform 22, it includes a lifting mechanism 220 and a lifting top plate 221 provided at the top of the lifting mechanism 220. The lifting rod 23 passes through the lifting top plate 221 and is fixed, reducing the storage height when the lifting top plate 221 cooperates with the lifting rod 23 (when contracted to the shortest), reducing the occupation of the longitudinal distance, and enhancing the storage capacity of a single lifting rod 23 for the belt 8;

[0064] S4. Tape storage: After vulcanization is completed, the TBM stops, the clamping device one and the clamping device two are released, and the tape changing device 5 is started to pull all the vulcanized whole roll of belt 8 into the tape storage device;

[0065] S5. Set the rated tunneling speed to 3.6 m / s. At this tunneling speed, control the lifting platform 22 and the lifting rods 23 to maintain the state after vulcanization is completed, and perform normal tunneling operations until the stored tape in the tape storage device is consumed to a predetermined threshold (basically consumed), and then perform tape storage again. Specifically:

[0066] Along the direction away from the vulcanization platform, the lifting rods 23 work in sequence to drive the corresponding second rollers 21 to move down to the lowest point, and then the lifting platform 22 descends, so that the multiple second rollers 21 further descend synchronously, gradually releasing the stored belt 8 and storing it in the tape storage device;

[0067] S6. Repeat steps S3 - S5 until the last stage of tunneling. At this time, the stored belt 8 stored in the tape storage device is consumed to complete the tunneling in the last stage.

[0068] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A continuous belt vulcanization method, characterized in that, It includes the following steps: S1. Set up a continuous belt conveyor: The continuous belt conveyor is arranged along the direction of the tunnel depth increase. It sequentially includes a head discharging device, a tape reel take-up and pay-off device, a first positioning device, a first vulcanizing device, a belt changing device, a second vulcanizing device, a second positioning device, a tape storage device, and a tail device through belt winding. Among them, the tape reel take-up and pay-off device includes a plurality of first rollers arranged above the belt and spaced longitudinally along the belt, and a second roller arranged between any adjacent first rollers and below the belt. Each second roller is arranged to be liftable; a lifting platform is arranged below all the second rollers. Lifting rods are respectively arranged at the top of the lifting platform corresponding to both ends of each second roller. When the lifting platform and the lifting rods are shortened to the shortest, the top height of the second roller is lower than the bottom height of the belt of the first positioning device; S2. Vulcanize the belt joints in the tunneling section: The first positioning device and the second positioning device respectively work to position the belt, and vulcanization operations are respectively carried out on both ends of the belt added through the belt changing device and the joints with the original belt by the first vulcanizing device and the second vulcanizing device; S3. While the vulcanization operation is in progress, the tape storage device supplies the belt to enable the tail device to move forward synchronously with the TBM tunneling, and control the second roller to rise so that the upper belt transports materials at a predetermined speed; S4. Store the belt: When the vulcanization is completed, the TBM stops, the clamping device one and the clamping device two are loosened, and the belt changing device is started to pull all the vulcanized whole rolls of belt into the tape storage device; S5. Control the lifting platform and the lifting rods to maintain the state after vulcanization is completed, perform normal tunneling operations until the stored belt in the tape storage device is consumed to a predetermined threshold, and control the second roller to descend for storing the belt again.

2. The continuous belt vulcanization method according to claim 1, characterized in that, The bottom height of the first roller is equal to the top height of the belt clamped by the first positioning device.

3. The continuous belt vulcanization method according to claim 1, wherein While the vulcanization operation is in progress, the tail device moves forward synchronously with the TBM tunneling, and the adjustment of the second roller rising specifically is: The lifting platform rises, and a plurality of second rollers rise synchronously to upwardly pull the lower belt, thereby driving the belt to transport while storing the transported belt. When the lifting platform rises to the highest point, the lifting platform stops working; Along the direction away from the vulcanization platform, the lifting rods work in sequence to drive the corresponding second rollers to move up to the highest point, thereby driving the belt to transport while storing the transported belt until the vulcanization is completed or all the second rollers move up to the high end, and the lifting rods stop working.

4. The continuous belt vulcanization method according to claim 1, characterized in that, The lifting platform includes a lifting mechanism and a lifting top plate arranged at the top of the lifting mechanism.

5. The continuous belt vulcanization method according to claim 4, characterized in that, The lifting rod passes through and is fixed to the lifting top plate.

6. The continuous belt vulcanization method according to claim 3, characterized in that, The storage length of the tape reel take-up and pay-off device is not less than the transport length of the belt during the vulcanization time.

7. The continuous belt vulcanization method according to claim 6, wherein, In step S5, the control of the second roller descending specifically is: Along the direction away from the vulcanization platform, the lifting rods work in sequence to drive the corresponding second rollers to move down to the lowest point, and then the lifting platform descends to enable a plurality of second rollers to further synchronously descend, gradually releasing the stored belt and storing it in the tape storage device.

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