Double-tensioning and double-winding-belt telescopic belt conveyor and belt storing and winding method

Abstract

The invention discloses a double-tensioning and double-winding-belt telescopic belt conveyor and a belt storing and winding method. The double-tensioning and double-winding-belt telescopic belt conveyor comprises an unloading transmission part, a tensioning device I, a belt storing bin, a tensioning device II and a machine tail part which are sequentially arranged. A moving trolley I and a moving trolley II which can move along the belt storage bin are arranged in the belt storage bin; the moving trolley I is connected with the tensioning device I, and the moving trolley II is connected with the tensioning device II; the tape winding device comprises a tape winding mechanism I and a tape winding mechanism II; the belt winding mechanism I is arranged between the unloading transmission part and the tensioning device I, and the belt winding mechanism II is arranged between the tensioning device II and the machine tail part; and the conveyor belt is in a closed ring shape and is rotatably wound on the unloading transmission part, the moving trolley I, the moving trolley II and the machine tail part. According to the invention, the structural advantages of double tensioning and double tape winding are fully utilized, the functions of doubling the length of the stored tape and bidirectionally and synchronously winding the tape are realized through proper control, the shutdown frequency and time are obviously reduced, and the mining operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and in particular to a double-tensioned, double-wound retractable belt conveyor and a belt storage and winding method. Background Technology

[0002] Extendable belt conveyors are mainly used in underground tunneling or longwall mining faces where roadway dimensions are limited and maintenance is difficult. Existing extendable belt conveyor storage bins typically use four or six layers to store belt, with a storage length of approximately 100 meters. One end of the storage bin is a fixed belt steering device, and the other end is a movable traveling trolley. Initially, the traveling trolley is close to the belt steering device. As the longwall mining face advances, the tail section of the conveyor moves towards the storage bin. The tensioning device pulls the traveling trolley within the storage bin, increasing the distance between the belt steering device and the traveling trolley. This allows the belt retracted from the tail section to be stored in the storage bin. When the stored belt length reaches the predetermined length, the belt conveyor stops, the tensioning device is released, the belt buckle is opened, and the stored belt is retrieved using the winding device. Only one roll of belt can be retrieved per stop.

[0003] However, the storage length of the belt in the storage bin of a telescopic belt conveyor depends on the number of belt layers and the length of the storage bin. Due to the limited roadway size, the size of the conveyor is affected by the roadway. Existing storage bins generally use four or six layers for belt storage, and it is difficult to increase the number of belt layers. The length of the storage bin is limited by the wire rope capacity of the tensioning device and the height of the storage bin. The storage length of the existing telescopic belt conveyor and the frequent shutdowns for belt recovery cannot meet the requirements of modern rapid mining technology, thus affecting operational efficiency. Summary of the Invention

[0004] In order to solve the technical problems existing in the above-mentioned technologies, it is necessary to provide a double-tensioned, double-wrap retractable belt conveyor.

[0005] A double-tensioned, double-wrap retractable belt conveyor includes an unloading transmission unit, a tensioning device I, a belt storage bin, a tensioning device II, and a tail section arranged sequentially.

[0006] The tape storage bin is equipped with two movable trolleys, I and II, which can move along the tape storage bin. The movable trolley I is connected to the tensioning device I, so that the tensioning device I can drive the movable trolley I to move along the tape storage bin. The movable trolley II is connected to the tensioning device II, so that the tensioning device II can drive the movable trolley II to move along the tape storage bin.

[0007] It also includes a belt winding device for recycling the conveyor belt, the belt winding device including a belt winding mechanism I and a belt winding mechanism II; the belt winding mechanism I is disposed between the unloading transmission part and the tensioning device I, and the belt winding mechanism II is disposed between the tensioning device II and the tail section;

[0008] It also includes a conveyor belt, which is a closed loop and rotatably wound around the unloading transmission unit, the traveling trolley I, the traveling trolley II, and the tail section.

[0009] Preferably, a redirecting roller assembly is provided between the winding mechanism I and the tensioning device I.

[0010] Preferably, the storage bin is provided with a track for the movement of the mobile trolley I and the mobile trolley II.

[0011] It is also necessary to provide a method for storing and winding belts in a double-tensioned, double-wrap retractable belt conveyor.

[0012] A method for storing and winding belt in a double-tensioned, double-wrap retractable belt conveyor, applicable to the aforementioned double-tensioned, double-wrap retractable belt conveyor, includes a belt storage process and a belt winding process.

[0013] The tape storage process is as follows:

[0014] Step A1: In the initial state, check and confirm that the traveling trolley I and traveling trolley II are located in the middle of the belt storage bin and that the conveyor belt tension is normal;

[0015] Step A2: Obtain the signal of the tail section moving towards the tape storage bin, calculate the required tape length increment, and trigger the tape storage process;

[0016] Step A3: Control the traveling trolleys I and II to move synchronously towards both ends of the storage bin;

[0017] Step A4: When the traveling trolley on either side reaches the end of that side, the limit switch is triggered, and the tensioning device on that side stops, while the traveling trolley on the other side continues to move and adjust the tension; if both traveling trolley I and traveling trolley II are in place, the belt storage is completed and the tension holding phase begins.

[0018] The winding process is as follows:

[0019] Step B1: When the belt storage is completed and the winding conditions are met, loosen tensioning device I and tensioning device II to slowly release the tension until the wire rope is slack, and open the belt buckle of the conveyor belt;

[0020] Step B2: Start the belt winding mechanism I and belt winding mechanism II, and simultaneously pull the traveling trolley I and traveling trolley II to retract the conveyor belt;

[0021] Step B3: After both the moving trolley I and the moving trolley II have reached their positions, the tape winding device stops; remove the two rolled rolls of tape.

[0022] Preferably, in step A3, the specific method by which the moving trolley I and the moving trolley II move synchronously is as follows:

[0023] Step A31: Obtain the start signals of tensioning device I and tensioning device II;

[0024] Step A32: Set the two mobile carts to move at equal speeds and in opposite directions; read the positions of the two mobile carts in real time, calculate the position deviation, and adjust the speed command to synchronize them;

[0025] Step A33: Monitor the wire rope tension in real time. When the tension exceeds the set upper limit, pause the corresponding tensioning device and wait for the tension to drop. When it is below the lower limit, accelerate the tightening to ensure that the conveyor belt tension is within the allowable range.

[0026] Preferably, in step B2, the specific method of synchronous tape winding is as follows:

[0027] Step B21: Start the tape winding mechanism I and tape winding mechanism II;

[0028] Step B22: Set the tape winding speed; the speed commands for both tape winding devices are the same.

[0029] Step B23: Monitor the belt speed and the position of the traveling carriage in real time, and calculate the actual recovery length;

[0030] Step B24: If the difference in recovery length between the two ends exceeds the set value, the speed on one side needs to be adjusted to compensate.

[0031] Step B25: The traveling trolley I and traveling trolley II move towards the center of the tape storage bin under the tension of the tape winding mechanism I and tape winding mechanism II. When the trolleys reach the position, the limit switch is triggered to stop the corresponding tape winding mechanism.

[0032] Preferably, the specific method of step A32 is as follows:

[0033] Obtain the current positions of mobile car I and mobile car II respectively;

[0034] The deviations of mobile cart I and mobile cart II relative to the midpoint are obtained respectively, and the deviations of mobile cart I and mobile cart II relative to the midpoint are set to be equal;

[0035] The synchronization error is calculated in real time, and the moving speeds of the two trolleys I and II are adjusted based on the synchronization error to ensure that they are synchronized.

[0036] Preferably, the specific method of step A33 is as follows:

[0037] Set the target tension value and obtain real-time tension data;

[0038] Calculate the tension deviation and adjust the tightening speed of tensioning device I and tensioning device II according to the tension deviation to ensure that the tension of the conveyor belt is within the allowable range.

[0039] Compared with existing technologies, the double-tensioned, double-winding retractable belt conveyor and its belt storage and winding method provided by this invention are mainly applied to long-distance underground tunneling or mining faces. Compared with current retractable belt conveyors, this invention can solve problems such as short storage belt length and frequent shutdowns for belt retrieval, reducing equipment downtime and increasing the effective working time of the retractable belt conveyor. By fully utilizing the structural advantages of double tensioning and double winding, and through precise closed-loop control of position and tension, the invention achieves the function of doubling the storage belt length and bidirectional synchronous winding, significantly reducing the number and duration of downtime. This meets the automation requirements of complex underground working conditions and improves mining efficiency. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the existing technology.

[0042] Figure 2 This is a schematic diagram of the initial state of the storage tape of the present invention.

[0043] Figure 3 This is a schematic diagram of the structure after the storage tape of the present invention is completed.

[0044] Figure 4 This is a schematic diagram of the tape winding process of the present invention.

[0045] Figure 5 This is a partial structural diagram of the tape winding process of the present invention.

[0046] In the diagram: Unloading transmission unit 01, tensioning device I 02, belt storage bin 03, tensioning device II 04, tail section 05, traveling trolley I 06, traveling trolley II 07, belt winding mechanism I 08, belt winding mechanism II 09, conveyor belt 10, redirecting roller assembly 20. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0049] Please refer to Figures 2 to 5 In one embodiment, the present invention provides a double-tensioned, double-wrap retractable belt conveyor, comprising an unloading transmission unit 01, a tensioning device I 02, a belt storage bin 03, a tensioning device II 04, and a tail section 05 arranged sequentially.

[0050] The storage bin 03 is equipped with two movable trolleys, I06 and II07, which can move along the storage bin 03. The movable trolley I06 is connected to the tensioning device I02, so that the tensioning device I02 can drive the movable trolley I06 to move along the storage bin 03. The movable trolley II07 is connected to the tensioning device II04, so that the tensioning device II04 can drive the movable trolley II07 to move along the storage bin 03.

[0051] It also includes a winding device for recycling the conveyor belt 10, the winding device including winding mechanism I08 and winding mechanism II09; the winding mechanism I08 is disposed between the unloading transmission part 01 and the tensioning device I02, and the winding mechanism II09 is disposed between the tensioning device II04 and the tail part 05.

[0052] It also includes a conveyor belt 10, which is a closed loop and rotatably wound around the unloading transmission unit 01, the traveling trolley I 06, the traveling trolley II 07, and the tail section 05.

[0053] Correspondingly, a redirecting roller assembly 20 is provided between the winding mechanism I08 and the tensioning device I02.

[0054] Looking further, the storage compartment 03 is equipped with tracks for the movement of the mobile trolleys I06 and II07.

[0055] In one embodiment, the present invention provides a method for storing and winding belts in a double-tensioned, double-wrap retractable belt conveyor, applicable to the double-tensioned, double-wrap retractable belt conveyor, including a belt storage process and a belt winding process.

[0056] The tape storage process is as follows:

[0057] Step A1: In the initial state, check and confirm that the traveling trolley I 06 and traveling trolley II 07 are located in the middle of the belt storage bin 03, and that the tension of the conveyor belt 10 is normal;

[0058] Step A2: Obtain the signal of the tail section 05 moving towards the tape storage bin 03, calculate the required tape storage length increment, and trigger the tape storage process; for example, obtain the signal of the tail section moving towards the tape storage bin 03, and calculate the cumulative displacement. ,when >When the start threshold (e.g., 10mm) is reached, the tape storage process is triggered;

[0059] Step A3: Control the traveling trolleys I 06 and II 07 to move synchronously towards both ends of the storage bin 03;

[0060] Step A4: When the traveling trolley on either side reaches the end of that side, the limit switch is triggered, and the tensioning device on that side stops, while the traveling trolley on the other side continues to move and adjust the tension; if both traveling trolley I06 and traveling trolley II07 are in place, the belt storage is completed and the tension holding phase begins.

[0061] The winding process is as follows:

[0062] Step B1: When the belt storage is completed and the winding conditions are met, loosen the tensioning device I02 and tensioning device II04 to slowly release the tension until the wire rope is slack, and open the belt buckle of the conveyor belt 10;

[0063] Step B2: Start the winding mechanism I08 and winding mechanism II09, and simultaneously pull the traveling trolley I06 and traveling trolley II07 to retract the conveyor belt 10;

[0064] Step B3: After both the moving trolley I 06 and the moving trolley II 07 have reached their positions, the tape winding device stops; remove the two rolled rolls of tape.

[0065] Of course, during operation, if the position difference between the two traveling trolleys exceeds the set threshold (e.g., 200mm), the PLC will issue an alarm and stop movement to check for mechanical jamming or sensor malfunction. If the tension exceeds the maximum allowable value (e.g., the conveyor belt's 10 strength limit), all tensioning actions will be stopped immediately and an alarm will sound; if the tension is too low (potentially slipping), tensioning will be increased or the machine will be stopped for inspection. If the traveling trolley exceeds its normal travel distance without triggering the limit switch, the PLC control cabinet will stop the machine urgently according to the over-limit value to prevent derailment.

[0066] To elaborate in detail, the specific method by which the moving trolleys I06 and II07 move synchronously in step A3 is as follows:

[0067] Step A31: Obtain the start signals of tensioning device I02 and tensioning device II04;

[0068] Step A32: Set the two mobile carts to move at equal speeds and in opposite directions; read the positions of the two mobile carts in real time, calculate the position deviation, and adjust the speed command to synchronize them;

[0069] Step A33: Monitor the wire rope tension in real time. When the tension exceeds the set upper limit, pause the corresponding tensioning device and wait for the tension to drop. When it is below the lower limit, accelerate the tightening to ensure that the tension of the conveyor belt is within the allowable range.

[0070] Accordingly, the specific method for step A32 is as follows:

[0071] The current positions of the moving car I06 and the moving car II07 are obtained respectively. , The distance between the mobile cart I06 and the mobile cart II07 is ;

[0072] The deviations of the mobile carts I06 and II07 relative to the midpoint were obtained respectively. , ,in, , It can be obtained through the following formula. , ;

[0073] Set the deviation of the moving carts I06 and II07 relative to the midpoint. ,Right now ;

[0074] Real-time calculation of synchronization error ,and ,like > If the allowable deviation is ±5mm, adjust the speed; if >0 indicates Larger or If the speed is too small, the speed of the moving trolley I06 should be reduced or the speed of the moving trolley II07 should be increased, or vice versa; ultimately, the two should be kept in sync.

[0075] Accordingly, the specific method for step A33 is as follows:

[0076] Set target tension value Real-time tension data are acquired between the moving trolley I06 and the tensioning device I, and between the moving trolley II07 and the tensioning device II04. , ;

[0077] Calculate tension deviation and ,and , ;like If the tension is greater than 0 (insufficient tension), increase the tightening speed of the tensioning device I02. If the tension is too high, slow down or stop; thus ensuring that the tension of the conveyor belt 10 is within the allowable range.

[0078] If the traveling trolley reaches its position on one side, for example, assuming traveling trolley I06 reaches its position first, immediately stop tensioning device I02 and record its position; tensioning device II04 continues to move, at which point the tension balance needs to be adjusted: because traveling trolley I06 stops, the tension distribution of conveyor belt 10 in the belt storage bin 03 changes, and the tension... It may rise (because the steel wire rope on the I06 side of the traveling trolley is no longer tightened). During the belt storage process, the tensioning device mainly serves to tighten the belt; after reaching the desired position, tension should be maintained, but if... If the tension is too high, the tensioning device I02 can be slightly reversed to reduce the tension, but the traveling carriage I06 must be prevented from leaving the end. The tensioning device I02 can be set to maintain tension once it is in position: according to... and To correct any deviation, fine-tune the motor of tensioning device I02 (forward or reverse rotation) to maintain the tension at [value missing]. Nearby, the position of the mobile trolley I06 is mechanically locked by the end limit switch (pressed down), and the slight movement of the motor will not cause the mobile trolley I06 to move significantly. The tensioning device II04 continues to move, but its tension... The tension of the conveyor belt 10 may fluctuate due to changes in the overall tension, and it is necessary to continue to adjust the tension. When the traveling trolley II07 is in position, the limit switch is triggered, and the belt storage is completed.

[0079] To elaborate in detail, the specific method of synchronous tape reeling in step B2 is as follows:

[0080] Step B21: Start the tape winding mechanism I08 and tape winding mechanism II09;

[0081] Step B22: Set the tape winding speed (e.g., 0.5 m / s), and the speed commands for both tape winding devices should be the same;

[0082] Step B23: Monitor the belt speed and the position of the traveling carriage in real time, and calculate the actual recovery length;

[0083] Step B24: If the difference in the recovery length at both ends exceeds the set value (e.g., 100mm), the speed on one side needs to be adjusted to compensate.

[0084] Step B25: The traveling trolley I and traveling trolley II move towards the center of the tape storage bin under the tension of the tape winding mechanism I and tape winding mechanism II. When the trolleys reach the position, the limit switch is triggered to stop the corresponding tape winding mechanism.

[0085] Accordingly, to ensure belt synchronization, a belt reference speed can be set. (e.g., 0.3 m / s); Start the winding mechanism I08 and winding mechanism II09 to rotate forward, with an initial speed of 0.3 m / s. ;

[0086] Calculate the linear velocity of the two belt rollers. , Where r is the roller radius (which can be estimated by the initial roll diameter plus the number of layers wound, or by measuring the roll diameter in real time using an ultrasonic rangefinder). For simplicity, we can assume that the initial radius is the same, and that the radius gradually increases with winding, but since the winding lengths of the two rollers are the same, the radius changes in the same way. When the rotational speeds are the same, the rotational speeds can be directly controlled to be the same.

[0087] However, to ensure that the recycling length is equal, it is necessary to monitor the position change of the moving trolley, because the length of the recycled tape is equal to the distance the trolley moves (considering the number of storage layers), and the distance the trolley moves can be obtained through a position sensor;

[0088] Set the travel distance of the mobile car I06 The distance traveled by the mobile car II07 Theoretically (Because the recovery lengths at both ends are equal), real-time calculation and If the difference exceeds the allowable value (e.g., 100mm), adjust the rotation speed: slow down the faster side and speed up the slower side.

[0089] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A double-tensioned, double-wrap retractable belt conveyor, characterized in that: It includes, in sequence, an unloading transmission unit, a tensioning device I, a belt storage bin, a tensioning device II, and a tail section; The tape storage bin is equipped with two movable trolleys, I and II, which can move along the tape storage bin. The movable trolley I is connected to the tensioning device I, so that the tensioning device I can drive the movable trolley I to move along the tape storage bin. The movable trolley II is connected to the tensioning device II, so that the tensioning device II can drive the movable trolley II to move along the tape storage bin. It also includes a belt winding device for recycling the conveyor belt, the belt winding device including a belt winding mechanism I and a belt winding mechanism II; the belt winding mechanism I is disposed between the unloading transmission part and the tensioning device I, and the belt winding mechanism II is disposed between the tensioning device II and the tail section; It also includes a conveyor belt, which is a closed loop and rotatably wound around the unloading transmission unit, the traveling trolley I, the traveling trolley II, and the tail section.

2. The double-tensioned, double-wrap retractable belt conveyor according to claim 1, characterized in that: A redirecting roller assembly is provided between the winding mechanism I and the tensioning device I.

3. The double-tensioned, double-wrap retractable belt conveyor according to claim 2, characterized in that: The storage bin is equipped with tracks for the movement of trolley I and trolley II.

4. A method for storing and winding belt in a double-tensioned, double-wrap retractable belt conveyor, applicable to the double-tensioned, double-wrap retractable belt conveyor as described in any one of claims 1-3, characterized in that: This includes the tape storage process and the tape winding process. The tape storage process is as follows: Step A1: In the initial state, check and confirm that the traveling trolley I and traveling trolley II are located in the middle of the belt storage bin and that the conveyor belt tension is normal; Step A2: Obtain the signal of the tail section moving towards the tape storage bin, calculate the required tape length increment, and trigger the tape storage process; Step A3: Control the traveling trolleys I and II to move synchronously towards both ends of the storage bin; Step A4: When the traveling trolley on either side reaches the end of that side, the limit switch is triggered, and the tensioning device on that side stops, while the traveling trolley on the other side continues to move and adjust the tension; if both traveling trolley I and traveling trolley II are in place, the belt storage is completed and the tension holding phase begins. The winding process is as follows: Step B1: When the belt storage is completed and the winding conditions are met, loosen tensioning device I and tensioning device II to slowly release the tension until the wire rope is slack, and open the belt buckle of the conveyor belt; Step B2: Start the belt winding mechanism I and belt winding mechanism II, and simultaneously pull the traveling trolley I and traveling trolley II to retract the conveyor belt; Step B3: After both the moving trolley I and the moving trolley II have reached their positions, the tape winding device stops; remove the two rolled rolls of tape.

5. The belt storage and winding method for a double-tensioned, double-winding retractable belt conveyor according to claim 4, characterized in that: In step A3, the specific method by which the moving trolley I and moving trolley II move synchronously is as follows: Step A31: Obtain the start signals of tensioning device I and tensioning device II; Step A32: Set the two mobile carts to move at equal speeds and in opposite directions; read the positions of the two mobile carts in real time, calculate the position deviation, and adjust the speed command to synchronize them; Step A33: Monitor the wire rope tension in real time. When the tension exceeds the set upper limit, pause the corresponding tensioning device and wait for the tension to drop. When it is below the lower limit, accelerate the tightening to ensure that the conveyor belt tension is within the allowable range.

6. The belt storage and winding method for a double-tensioned, double-winding retractable belt conveyor according to claim 5, characterized in that: In step B2, the specific method for synchronizing the tape reel is as follows: Step B21: Start the tape winding mechanism I and tape winding mechanism II; Step B22: Set the tape winding speed; the speed commands for both tape winding devices are the same. Step B23: Monitor the belt speed and the position of the traveling carriage in real time, and calculate the actual recovery length; Step B24: If the difference in recovery length between the two ends exceeds the set value, the speed on one side needs to be adjusted to compensate. Step B25: The traveling trolley I and traveling trolley II move towards the center of the tape storage bin under the tension of the tape winding mechanism I and tape winding mechanism II. When the trolleys reach the position, the limit switch is triggered to stop the corresponding tape winding mechanism.

7. The belt storage and winding method for a double-tensioned, double-wrap retractable belt conveyor according to claim 6, characterized in that: The specific method for step A32 is as follows: Obtain the current positions of mobile car I and mobile car II respectively; Obtain the deviations of mobile cart I and mobile cart II relative to the midpoint, and set the deviations of mobile cart I and mobile cart II relative to the midpoint to be equal; The synchronization error is calculated in real time, and the moving speeds of the two trolleys I and II are adjusted based on the synchronization error to ensure that they are synchronized.

8. The belt storage and winding method for a double-tensioned, double-winding retractable belt conveyor according to claim 7, characterized in that: The specific method for step A33 is as follows: Set the target tension value and obtain real-time tension data; Calculate the tension deviation and adjust the tightening speed of tensioning device I and tensioning device II according to the tension deviation to ensure that the tension of the conveyor belt is within the allowable range.

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