CN116330546A

CN116330546A - Continuous belt vulcanization process

Info

Publication number: CN116330546A
Application number: CN202310207884.7A
Authority: CN
Inventors: 叶明�; 孙义; 慕光明; 王宝安; 王文龙; 张迪; 王帅
Original assignee: Sinohydro Bureau 6 Co Ltd
Current assignee: Sinohydro Bureau 6 Co Ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-06-27

Abstract

The invention discloses a continuous belt vulcanizing method, which comprises the following steps: s1, positioning a belt and performing vulcanization operation; s3, while vulcanizing, the belt storage device provides a belt to enable the tail device to synchronously tunnel and move forwards by the TBM, and the second rolling shaft is controlled to ascend so that the upper belt transports materials at a preset speed; s4, stopping the TBM after vulcanization is completed, loosening the clamping device I and the clamping device II, and starting the belt replacing device to pull the vulcanized whole belt into the belt storing device; s5, controlling the lifting table and the lifting rod to maintain the state after vulcanization is completed, performing normal tunneling operation until the belt storage consumption in the belt storage device reaches a preset threshold value, and controlling the second roller to descend for belt storage again. The invention has the beneficial effects of reducing the downtime of the tunneling section and even achieving no shutdown.

Description

Continuous belt vulcanization process

Technical Field

The invention relates to the technical field of tunnel construction. More particularly, the present invention relates to a continuous belt curing process.

Background

The continuous belt conveyor is the main equipment of a TBM (tunnel boring machine) construction slag discharging system, and generally comprises a main drive, a movable tail section, a belt storage bin, a vulcanizing table and the like. When TBM is tunneled forward, the belt storage bin continuously outwards releases the belt, so that the continuous belt conveyor extends to meet the requirement of increasing the tunnel construction depth. Because the belt storage capacity of the belt storage bin is limited, the belt is vulcanized once in every tunneling for a certain distance (200-250 m), so that a new roll of belt is added to the continuous belt conveyor, and the continuous slag discharging operation of the TBM is met. In the vulcanizing process, the original belt is cut off, a new belt is newly added, so that the transportation channel of the whole belt conveyor is cut off and stopped, namely, the traditional vulcanizing operation is stopped, and the problems of reducing the engineering progress and increasing the fund investment exist. The application number is 201810204466.1, the patent with the name of a TBM sliding section continuous belt conveyor extension TBM non-stop vulcanizing method discloses that when the TBM slides, a belt is pulled by a tail roller, the tail roller pulls a lower belt of the continuous belt conveyor, the lower belt is pulled out from a belt storage bin, an upper belt is not moved in the pulling process, the lower belt slides into a hole on a lower carrier roller and outputs an extension quantity for the upper belt, and non-stop vulcanizing operation is realized; however, the method is not suitable for the tunneling section because broken stones and the like are required to be continuously transported out of the tunnel when the tunneling section is tunneling. How to design a vulcanization operation method, reducing the downtime of a tunneling section and even not stopping the tunneling section, thereby reducing the influence on engineering progress and capital investment caused by vulcanization shutdown is a problem which needs to be solved in the prior art.

Disclosure of Invention

It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.

It is still another object of the present invention to provide a continuous belt curing process that reduces the downtime of the tunneling section, even up to a non-stop, thereby reducing the impact on engineering progress, capital investment due to curing downtime.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a continuous belt vulcanization method comprising the steps of:

the method comprises the following steps:

s1, setting a continuous belt conveyor: the continuous belt conveyor sequentially comprises a head discharging device, a belt winding and unwinding device, a first positioning device, a first vulcanizing device, a belt replacing device, a second vulcanizing device, a second positioning device, a belt storing device and a tail device through a belt winding in the deepening direction of the tunnel, wherein the belt winding and unwinding device comprises a plurality of first rolling shafts which are arranged above the belt and are arranged at intervals along the longitudinal direction of the belt, and second rolling shafts which are arranged between any adjacent first rolling shafts and are positioned below the belt, and each second rolling shaft can be arranged in a lifting manner;

s2, vulcanizing a belt joint of a tunneling section: the first positioning device and the second positioning device respectively work and position the belt, and the first vulcanizing device and the second vulcanizing device respectively carry out vulcanizing operation between the two ends of the belt added by the belt replacing device and the original belt connector;

s3, while vulcanizing, the belt storage device provides a belt to enable the tail device to synchronously tunnel and move forwards by the TBM, and the second rolling shaft is controlled to ascend so that the upper belt transports materials at a preset speed;

s4, storing the belt: when vulcanization is completed, the TBM is stopped, the clamping device I and the clamping device II are loosened, and the belt replacing device is started to pull the vulcanized whole belt into the belt storing device;

s5, controlling the lifting table and the lifting rod to maintain the state after vulcanization is completed, performing normal tunneling operation until the belt storage consumption in the belt storage device reaches a preset threshold value, and controlling the second roller to descend for belt storage again.

Preferably, the bottom end of the first roller is equal to the top end of the belt clamped by the first positioning device.

Preferably, lifting tables are arranged below all the second rolling shafts, lifting rods are arranged at the top ends of the lifting tables and corresponding to the two ends of each second rolling shaft, wherein the lifting tables and the lifting rods are shortened to be shortest, and the top ends of the second rolling shafts are lower than the bottom ends of the belts of the first positioning devices.

Preferably, the tail device synchronizes the tunneling forward movement of the TBM, and the adjusting of the second roller to rise is specifically:

the lifting platform ascends, the plurality of second rolling shafts ascend synchronously to drag the lower belt upwards, the belt is driven to be conveyed, meanwhile, the conveyed belt is contained, and when the lifting platform ascends to the highest point, the lifting platform is stopped;

along the direction of keeping away from the vulcanization platform, the lifter is worked in proper order and is driven to correspond the second roller bearing and move up to the highest point, and then when driving belt transmission, accomodate the belt of transmission and accomplish or all second roller bearings and move up to the high end, the lifter is shut down.

Preferably, the lifting platform comprises a lifting mechanism and a lifting top plate arranged at the top end of the lifting mechanism.

Preferably, the lifting rod is fixed through the lifting top plate.

Preferably, the storage length of the tape winding and unwinding device is not less than the transmission length of the belt in the vulcanization time.

Preferably, in step S5, the controlling of the second roller to descend is specifically:

along the direction of keeping away from the vulcanization platform, the lifter is operated in proper order and is driven corresponding second roller bearing and moves down to the minimum, and then, the elevating platform descends to make a plurality of second roller bearing further synchronous decline, progressively releases and accomodates the belt and store to in the belt storage device.

The invention at least comprises the following beneficial effects:

through setting up of receiving and releasing the area device, realize the operation of not shutting down in the development stage vulcanization process, improve TBM entry driving machine's effective tunneling efficiency, specific:

(1) The belt quantity required by belt transmission can be stored in the retractable belt in the vulcanization tunneling stage, further, the partial belt quantity can be stored in the belt storage device again without influencing the earlier belt supply capacity of the belt storage device, further, the normal tunneling work of the tunneling stage is not influenced, and further, the stored belt quantity again can be used for providing the extension quantity requirement of the final tunneling stage, which is equivalent to integrally reducing sequential vulcanization operation, and further, the effective tunneling efficiency is improved;

(2) The belt winding and unwinding device is arranged to be lifted in two stages, and comprises a lifting table and a lifting rod, wherein the lifting table can synchronously lift the belt relative to the first rollers at the initial stage of storage, and further the belt is positioned by being matched with the two first rollers at the end part, so that the belt guiding is realized, the stability of belt transmission is improved, and the damage to the belts at the two sides of the belt winding and unwinding device due to lifting is reduced; the lifting rod is further used for lifting step by step, so that the influence on the stored and unreleased belts in the storage and release process is reduced as much as possible, and the convenience of storage and release use is improved;

(3) The lifting rod passes through the lifting top plate to be fixed, so that the storage height of the lifting top plate when being matched with the lifting rod to be stored is reduced, the occupation of the longitudinal distance is reduced, and the storage capacity of a single lifting rod to a belt is enhanced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural view of a continuous belt conveyor according to one embodiment of the present invention;

fig. 2 is a schematic structural diagram of the tape winding and unwinding device according to one embodiment of the present invention;

fig. 3 is a schematic structural diagram of the tape winding and unwinding device according to one embodiment of the present invention.

The reference numerals specifically are: a head discharge device 1; a tape winding and unwinding device 2; a first roller 20; a second roller 21; a lifting table 22; a lifting mechanism 220; lifting a top plate 221; a lifting rod 2; a first positioning device 3; a first vulcanizing device 4; a tape changing device 5; a second vulcanizing device 6; a second positioning device 7; a belt 8; an upper belt 80; a lower belt 81.

Detailed Description

The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.

< scheme 1>

As shown in fig. 1-3, the continuous belt vulcanizing method, taking the auxiliary conveying roadway TBM continuous belt vulcanizing operation as an example, comprises the following steps:

s1, setting a continuous belt conveyor: the continuous belt conveyor sequentially comprises the following components along the deepening direction of the tunnel depth:

(1) the head unloading device 1 is positioned at the right end as shown in fig. 1, and can adopt a probe roller unloading mode, and the transported materials are unloaded through the head unloading device 1;

(2) the belt winding and unwinding device 2 comprises a plurality of first rollers 20 arranged above the belt 8 and longitudinally arranged along the belt 8 at intervals, and a second roller 21 arranged between any two adjacent first rollers 20 and positioned below the belt 8, wherein the first rollers 20 are fixedly arranged in the height direction, namely, the first rollers 20 are rotatably arranged along the central axis of the first rollers 20, the bottom end height of the first rollers 20 is equal to the top end height of the belt 8 clamped by the first positioning device 3 (the corresponding belt 8 is clamped by the first positioning device 3 in situ, the transmission height of the belt 8 is not changed), in the use process, through the arrangement of the belt winding and unwinding device 2, the non-stop operation in the vulcanization process of a tunneling section is realized, the effective tunneling efficiency of the TBM tunneling machine is improved, and the concrete: the belt quantity required by the belt 8 transmission can be stored in the belt storage device by the winding and unwinding belt in the vulcanization tunneling stage, further, the partial belt quantity can be stored in the belt storage device again without influencing the earlier belt supply capacity of the belt storage device, further, the normal tunneling work of the tunneling stage is not influenced, and further, the stored belt quantity can be used for providing the extension quantity requirement of the final tunneling stage, which is equivalent to integrally reducing sequential vulcanization operation, and further, the effective tunneling efficiency is improved;

each second roller 21 is configured to be liftable, specifically: lifting tables 22 are arranged below all the second rollers 21, lifting rods 2 are correspondingly arranged at the top ends of the lifting tables 22 and at the two ends of each second roller 21, namely, one second roller 21 corresponds to two lifting rods 2 and is respectively arranged at the front ends of the second rollers 21 so as to drive the second rollers 21 to move up and down relative to the lifting tables 22, and the second rollers 21 are rotatably arranged along the central axis of the second rollers; further, when the lifting table 22 and the lifting rod 2 are shortened to the shortest time (at this time, the second roller 21 is lowered to the lowest), the top end of the second roller 21 is lower than the bottom end of the belt 8 of the first positioning device 3, and in the use process, the belt winding and unwinding device 2 is arranged to comprise two stages of lifting of the lifting table 22 and the lifting rod 2, the lifting table 22 can synchronously lift the belt 8 relative to the first rollers at the initial stage of storage, and further the two first rollers at the end part are matched to realize the guiding positioning of the belt 8, so that the stability of the belt 8 transmission is improved, and the damage to the belts 8 at two sides of the belt winding and unwinding device 2 due to lifting is reduced; further, the lifting rod 2 is used for lifting step by step, so that the influence on the stored and unreleased belt 8 in the storage and release process is reduced as much as possible, and the convenience of storage and release use is improved;

(2) the first positioning device 3 is used for clamping the correspondingly penetrated belt 8 in situ, and positioning the belt 8 without changing the transmission height of the belt 8;

(3) a first vulcanisation device 4 for vulcanising one of the joints during the addition of a new strip;

(4) a tape changing device 5 for adding a new tape;

(5) the second vulcanizing device 6 is used for vulcanizing the other joint in the process of adding a new belt and is matched with the first vulcanizing device 4 to realize synchronous vulcanization of the two joints;

(6) the second positioning device 7 is used for clamping the correspondingly penetrated belt 8 in situ, and positioning the belt 8 without changing the transmission height of the belt 8, wherein the first positioning device 3 and the second positioning device 7 are matched and positioned to form a stable space to be vulcanized, and a space is provided for the installation work of the first vulcanizing device 4, the belt replacing device 5 and the second vulcanizing device 6;

(7) the belt storage device can continuously, rapidly and uninterruptedly convey materials (waste residues) for the continuous belt conveyor, is used for storing the belt 8, can store the belt 8 of 400-600m generally, and can continuously operate for 200-300m without stopping the continuous belt conveyor;

(8) the tail device is used for bearing materials to the belt 8 and is matched with the tunnel boring machine to be installed;

the devices are wound by the belt 8, and the deepening direction along the tunnel is the moving direction of the lower belt 81, which is opposite to the transporting direction of the upper belt 80;

s2, setting the storage capacity of a storage device to be 500m, and setting the rated tunneling speed to be 3.6m/S, wherein at the tunneling speed, the lifting table 22 and the lifting rod 2 are controlled to be shortened to be the shortest, the operation of the belt 8 is not affected, and tunneling is carried out until the storage capacity is a first threshold value (the tunneling and transportation requirements of the belt 8 during the vulcanization period of the slow foot of the length of the belt 8);

s3, when tunneling is carried out until the memory capacity is a first threshold value, carrying out tunneling section belt joint vulcanization operation, and specifically:

s3.1, construction preparation work:

dust is cleaned within 20m before and after the vulcanization construction site by 1 day in advance;

all the constructors wear the work clothes and wear gloves;

the tool and the material used for vulcanization construction are transported to a construction site in advance and put into a proper position;

the power supply is connected in advance, the whole set of the tool and the adhesive material (raw glue, thick and thin adhesive tape, acetone or dimethylbenzene, chemical fiber towel and the like) of the vulcanizing belt 8 are prepared, and the small tools comprise paper cutters, sharp cutters, knife grinding oil stones, scissors, steel plate rulers, nipper pliers, wire pliers, polishing machines and the like; and equipment such as a vulcanizing machine heating plate, a temperature control switch, a polishing machine and the like are debugged, so that normal use can be ensured;

s3.2, the first positioning device 3 and the second positioning device 7 work and position the belt 8 respectively;

s3.3, selecting proper positions for placing the first vulcanizing device 4 and the second vulcanizing device 6, and further respectively performing vulcanizing operation between two ends of the belt 8 (500 m) added by the belt replacing device 5 and the original belt joint through the first vulcanizing device 4 and the second vulcanizing device 6, wherein the vulcanizing operation specifically comprises the following steps:

manufacturing a belt joint: the total length of overlapping buckling at two ends of the belt connector is ensured to be 0.8B (B is the width of the belt), the front and the back of the belt 8 are separated, the damaged connector is cut off by a wallpaper knife handle, the connector is scored and the point is taken, the belt 8 is peeled into corresponding steps along the ply of the lining, and the length of each step is equally divided according to the layer number of the ply of the lining of the belt; the width of each cut rubber is preferably 50mm, so that the rubber can be conveniently torn off from the ply in a strip shape; the method comprises the steps of thoroughly removing rubber on the surface of a lining ply when peeling, carefully polishing surface layer adhesive by using a copper wire polishing wheel, carefully cleaning the surface by using acetone or dimethylbenzene, separating a wiped tooth-shaped joint from a template after liquid volatilizes, putting a polyester film (or newspaper) and a face adhesive on a vulcanizing machine flat plate, and spreading uniformly;

uniformly brushing a layer of raw rubber water-black slurry on the peeled ladder surface, and brushing once again after fully absorbing the raw rubber water-black slurry; after slightly airing, a layer of raw rubber is compactly paved, carefully buckled and butted, the seam is ensured to be aligned, the seam is tightly screwed, the bonding layer cannot be provided with bubbles, and a knife blade can be used for carefully scratching the raw rubber at the bulge and then compacting the raw rubber without leaving gaps;

sequentially buckling a pressing plate of a vulcanizing machine, uniformly pressing a pressing plate bolt, connecting a temperature sensor and a heating device, pressing to a specified instrument reading by using a water pressure machine, and simultaneously starting a heating power supply to perform an automatic vulcanization curing procedure, wherein the specified vulcanization temperature is reached, and timing and heat preservation are started for about 40 minutes; when the heat preservation time is up, the vulcanizing machine begins to enter a cooling stage, and is usually cooled slowly, when the temperature is lower than 60 ℃, the cooling process is finished, the first vulcanizing device 4 and the second vulcanizing device 6 are dismantled, the quality of the joints of the vulcanized belt is checked, and after the quality is confirmed, the waste materials of the vulcanizing machine are cleaned;

simultaneously with the above-described vulcanisation operation, the belt storage device provides the belt 8 to synchronize the advancing movement of the tail device with the TBM tunneling and controls the raising of the second roller 21 so that the upper belt 80 transports the material at a predetermined speed, in particular:

the tail device synchronously moves forward in TBM tunneling;

the synchronous lifting platform 22 ascends, the plurality of second rollers 21 ascend synchronously to drag the lower belt 81 upwards, and the belt 8 is driven to be conveyed, meanwhile, the conveyed belt 8 is stored, and when the lifting platform 22 ascends to the highest point, the lifting platform 22 is stopped;

further, along the direction away from the vulcanization platform, the lifting rod 2 sequentially works to drive the corresponding second rolling shafts 21 to move upwards to the highest point, so that the belt 8 is driven to be conveyed, meanwhile, the belt 8 which is stored and conveyed is conveyed until vulcanization is completed or all the second rolling shafts 21 move upwards to the high end, the lifting rod 2 is stopped, and the storage length of the belt winding and unwinding device 2 is preferably not less than the conveying length of the belt 8 in vulcanization time, wherein on the basis of meeting synchronous tunneling requirements, the conveying speed of the belt 8 is reduced, the vulcanization time is reduced, and meanwhile, the specification of the belt winding and unwinding device 2 is reduced while the section time conveying requirements are met;

specifically, for the lifting platform 22, it includes a lifting mechanism 220 and a lifting top plate 221 disposed at the top end of the lifting mechanism 220, where the lifting rod 2 passes through the lifting top plate 221 to be fixed, so as to reduce the storage height of the lifting top plate 221 when the lifting top plate 221 is matched with the lifting rod 2 to be stored (contracted to the shortest time), reduce the occupation of the longitudinal distance, and enhance the storage capability of a single lifting rod 2 on the belt 8;

s4, storing the belt: when vulcanization is completed, the TBM is stopped, the clamping device I and the clamping device II are loosened, and the belt replacing device 5 is started to pull the vulcanized whole roll of the belt 8 into the belt storing device;

s5, setting a rated tunneling speed to be 3.6m/S, controlling the lifting platform 22 and the lifting rod 2 to maintain a vulcanized state at the tunneling speed, performing normal tunneling operation until the storage belt consumption in the belt storage device reaches a preset threshold value (the basic consumption is finished), and performing the belt storage again, specifically:

along the direction away from the vulcanization platform, the lifting rod 2 sequentially works to drive the corresponding second rolling shafts 21 to move downwards to the lowest point, and then the lifting platform 22 descends to enable the plurality of second rolling shafts 21 to further descend synchronously, so that the storage belt 8 is gradually released and stored in the belt storage device;

s6, repeating the steps S3-S5 until tunneling reaches a final stage, and consuming the storage belt 8 stored in the belt storage device to finish tunneling at the final stage.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. A continuous belt curing process comprising the steps of:

2. The continuous belt curing process of claim 1, wherein the first roller has a bottom end height equal to a top end height of the belt held by the first positioning device.

3. The continuous belt curing process of claim 2, wherein a lift is provided below all of the second rollers, lift bars are provided at the top ends of the lift corresponding to both ends of each of the second rollers, wherein the lift bars and the lift bars are shortened to a minimum, and the height of the top ends of the second rollers is lower than the height of the bottom ends of the belt of the first positioning device.

4. A continuous belt curing process as claimed in claim 3, wherein the tail unit is moved forward in synchronism with the TBM advancing during the curing operation and the adjustment of the second roller elevation is in particular:

5. A continuous belt curing process as in claim 3, wherein the lift comprises a lift mechanism and a lift ceiling disposed at a top end of the lift mechanism.

6. The continuous belt curing process of claim 1, wherein the lift pins are secured through the lift ceiling.

7. The continuous belt curing process of claim 4, wherein the take-up and pay-off device has a take-up length that is not less than the belt transport length during the curing time.

8. The continuous belt curing process of claim 7, wherein controlling the second roller descent in step S5 is specifically: