A belt conveyor deviation rectification device and method based on offset change amount

Abstract

A belt conveyor deviation rectification device and method based on offset change amount of the present invention discloses a device that adjusts the movable bottom plate to adapt to conveyor belts of different specifications, and at the same time, according to the measured offset change amount, drives the deviation rectification roller to deflect through the deviation rectification hydraulic rod to rectify the conveyor belt. It is characterized by consisting of a support component and a deviation rectification component. The support component consists of a movable bottom plate, a support rod, a displacement sensor, a deviation rectification hydraulic rod, a fixed base, a support column and a bottom plate hydraulic rod. The support column is placed on the fixed base. The fixed base is of a rectangular structure. The support column is located in the middle of the fixed base. One end of the support column is connected to the fixed base. An avoidance groove is opened at the other end of the support column. A group of bottom plate hydraulic rods are correspondingly arranged on both sides of the fixed base. A group of the bottom plate hydraulic rods consists of two bottom plate hydraulic rods. The two bottom plate hydraulic rods in the same group are equidistantly distributed along the side wall of the fixed base.

Description

Technical Field

[0001] A belt conveyor deviation rectification device and method based on offset change amount of the present invention relate to a device and method for rectifying a belt conveyor according to the offset change amount, belonging to the technical field of belt conveyors. Background Art

[0002] A belt conveyor is an indispensable economical logistics conveying equipment for forming a rhythmic assembly line. After long-term operation of a traditional belt conveyor, due to reasons such as unbalanced tension, object partial load, lateral thrust, and rack deformation, the phenomenon of belt deviation is likely to occur, which not only affects the transportation efficiency of the belt conveyor but also causes unnecessary loss of materials. When the belt of the belt conveyor deviates, the traditional method is to stop the machine first and then manually adjust the deviated belt, which is time-consuming and laborious and affects the normal operation of the belt conveyor. Existing deviation rectification devices rectify by installing multiple deviation rectification rollers. However, the positions of the deviation rectification rollers are relatively fixed, and they can only be applied to a single specification of conveyor belt, with a narrow application range.

[0003] Publication No. CN211418627U discloses a belt conveyor belt deviation rectification device. The belt deviation rectification device includes a plurality of belt deviation rectification mechanisms installed on both sides of the belt conveyor. The belt deviation rectification mechanism includes a bracket vertically and fixedly connected to the intermediate frame of the belt conveyor, and a rotatable upper idler and a lower idler are respectively installed at the upper and lower ends of the bracket; the positions of the idlers of this deviation rectification device are relatively fixed, and it can only be applied to a single specification of conveyor belt, with a narrow application range.

[0004] Publication No. CN209582701U discloses an inverted V-shaped electric deviation rectification device for a belt conveyor, including an inverted V-shaped deviation rectifier and an electric swing rod unit. The inverted V-shaped deviation rectifier includes a deviation rectification bracket, a central rotating shaft, a deviation rectification roller, and a deviation rectification rod. Both ends of the deviation rectification bracket are installed on the intermediate frame of the belt conveyor, and the central rotating shaft is installed on the deviation rectification bracket in an inverted Y shape; the position of the deviation rectification roller of this deviation rectification device is relatively fixed, and it can only be applied to a single specification of conveyor belt, with a narrow application range. Summary of the Invention

[0005] In order to improve the above situation, a belt conveyor deviation rectification device and method based on offset change amount of the present invention provides a device that can adapt to conveyor belts of different specifications by adjusting a movable bottom plate, and at the same time, according to the measured offset change amount, drives a deviation rectification roller to deflect through a deviation rectification hydraulic rod to rectify the conveyor belt.

[0006] The belt conveyor deviation rectification device based on offset change amount of the present invention is realized as follows: The belt conveyor deviation rectification device based on offset change amount of the present invention is composed of a support assembly and a deviation rectification assembly.

[0007] The support assembly consists of a movable bottom plate, a support rod, a displacement sensor, a deviation-correcting hydraulic rod, a fixed base, a support column, and a bottom plate hydraulic rod.

[0008] The support column is placed on the fixed base.

[0009] Preferably, the fixed base is of a rectangular structure.

[0010] Preferably, the support column is located in the middle of the fixed base.

[0011] One end of the support column is connected to the fixed base, and the other end of the support column is provided with an avoidance groove.

[0012] A group of bottom plate hydraulic rods are correspondingly arranged on both sides of the fixed base. A group of the bottom plate hydraulic rods consists of two bottom plate hydraulic rods.

[0013] Preferably, the two bottom plate hydraulic rods in the same group are equidistantly distributed along the side wall of the fixed base.

[0014] One end of the bottom plate hydraulic rod is connected to the fixed base, and the other end is connected to the movable bottom plate.

[0015] The support rod is placed on the movable bottom plate.

[0016] Preferably, the support rod is located at the corner of the movable bottom plate far from the bottom plate hydraulic rod.

[0017] One end of the support rod is connected to the movable bottom plate, and a displacement sensor is arranged at the other end.

[0018] The deviation-correcting hydraulic rod is placed on the movable bottom plate. One end of the deviation-correcting hydraulic rod is connected to the movable bottom plate, and a U-shaped plate with an avoidance function is connected to the other end of the deviation-correcting hydraulic rod.

[0019] Preferably, the deviation-correcting hydraulic rod is close to the side of the movable bottom plate far from the bottom plate hydraulic rod, and the deviation-correcting hydraulic rod and the support column are on the same straight line.

[0020] A data processor is arranged on the movable bottom plate, and a controller is arranged on the deviation-correcting hydraulic rod.

[0021] Preferably, the displacement sensor and the data processor are electrically connected, and the data processor and the controller are electrically connected.

[0022] The deviation-correcting assembly consists of a limit wheel, a limit shaft, a deviation-correcting roller, a telescopic rod, a telescopic cylinder hinge groove, a telescopic cylinder, and a limit shaft hinge groove.

[0023] The telescopic cylinder is rotatably placed on the other end of the support column, and a telescopic cylinder hinge groove is formed in the middle of the telescopic cylinder.

[0024] Preferably, the telescopic cylinder hinge groove is of an arc structure.

[0025] The telescopic cylinder hinge groove is internally provided with a hinge part, and the telescopic cylinder is hinged to the other end of the support column through the hinge part.

[0026] Limit rings are correspondingly arranged at both ends of the telescopic cylinder, and slidable telescopic rods are correspondingly arranged at both ends of the telescopic cylinder.

[0027] Preferably, the telescopic cylinder is of a rectangular structure, and the limit rings are of a circular structure.

[0028] Preferably, one end of the telescopic rod passes through the corresponding limit ring and extends into the telescopic cylinder.

[0029] A limit plate is arranged at one end of the telescopic rod.

[0030] Preferably, the limit plate is of a rectangular structure, and the limit plate corresponds to the limit ring.

[0031] The deviation correction roller sleeve is arranged on the other end of the telescopic rod, and the deviation correction roller is rotatably connected to the telescopic rod through a rotating bearing.

[0032] The other end of the telescopic rod passes through the deviation correction roller and extends outwards, and the other end of the telescopic rod is connected to the limit shaft.

[0033] Preferably, one end of the limit shaft is bent at an obtuse angle with the telescopic rod, and then extends obliquely upwards to the other end.

[0034] A limit shaft hinge groove is formed on the limit shaft.

[0035] Preferably, the limit shaft hinge groove is of an arc structure, and the limit shaft hinge groove is close to one end of the limit shaft.

[0036] The limit shaft hinge groove is internally provided with a hinge part, and the limit shaft is hinged to the U-shaped plate at the other end of the deviation correction hydraulic rod through the hinge part.

[0037] The limit wheel sleeve is arranged on the other end of the limit shaft, and the limit wheel is rotatably connected to the limit shaft through a rotating bearing.

[0038] Preferably, the limit wheel is of a cylindrical structure, and the diameter of the limit wheel gradually increases in an arc shape from the middle to both ends.

[0039] Preferably, the height of one end of the limit wheel close to the deviation correction roller is lower than the height of the deviation correction roller.

[0040] The belt conveyor deviation correction device and method based on the offset change amount of the present invention further relate to a belt conveyor deviation correction method based on the offset change amount, including the following steps:

[0041] 1) Place this deviation correction device under the belt conveyor frame.

[0042] 2) Start the hydraulic rod of the bottom plate. The telescopic movement of the hydraulic rod of the bottom plate drives the movable bottom plate to adjust its position, so that the displacement sensors on the movable bottom plate are located on both sides of the conveyor belt and there is a gap between them and the edges of the conveyor belt;

[0043] 3) Start the displacement sensors to monitor the distance between them and the edges of the conveyor belt;

[0044] 4) Place a backing plate on the movable bottom plate so that the deviation correction roller contacts the bottom of the conveyor belt and the ends of the deviation correction roller protrude beyond the conveyor belt;

[0045] 5) When the conveyor belt deviates, the conveyor belt will touch the limit wheels. Under the action of the limit wheels, the further deviation of the conveyor belt is blocked;

[0046] 6) During the deviation of the conveyor belt, the distance monitored by the displacement sensors changes. The displacement sensors send the distance information to the data processor on the movable bottom plate;

[0047] 7) The signal conversion module of the data processor receives the distance information from the displacement sensors and conducts signal conversion. The data processing module of the data processor compares and analyzes the distance value after signal conversion with the set initial distance value to obtain the deviation change amount of the conveyor belt. The data processor sends the deviation correction signal to the controller according to the deviation change amount;

[0048] 8) After receiving the deviation correction signal, the controller generates the corresponding deviation correction instruction, controls the deviation correction telescopic rod in the deviation direction of the conveyor belt to extend, thereby driving the adjacent deviation correction roller to lift upward, and the other deviation correction hydraulic rod contracts, and the other deviation correction roller deflects downward. During this process, synchronous rotation also occurs between the telescopic cylinder and the support column. Under the lifting action of the deviation correction roller, the conveyor belt is adjusted straight.

[0049] Beneficial effects

[0050] 1. It can adapt to conveyor belts of different specifications.

[0051] 2. It can correct the deviation of the conveyor belt according to the measured deviation change amount.

[0052] 3. Multiple deviation correction devices cooperate with each other, and can more timely detect the deviation of the conveyor belt and correct its deviation. Description of the drawings

[0053] Figure 1 The three-dimensional structure diagram of a belt conveyor deviation correction device based on the deviation change amount of the present invention;

[0054] Figure 2 The structural schematic diagram of a belt conveyor deviation correction device based on the deviation change amount of the present invention.

[0055] In the drawings

[0056] Among them are: movable bottom plate (1), support rod (2), displacement sensor (3), limit wheel (4), limit shaft (5), deviation rectifying roller (6), telescopic rod (7), telescopic cylinder hinge groove (8), telescopic cylinder (9), limit shaft hinge groove (10), deviation rectifying hydraulic rod (11), fixed base (12), support column (13), bottom plate hydraulic rod (14). Detailed implementation mode

[0057] A deviation rectifying device for a belt conveyor based on the offset change amount of the present invention is composed of a support assembly and a deviation rectifying assembly.

[0058] The support assembly is composed of a movable bottom plate (1), a support rod (2), a displacement sensor (3), a deviation rectifying hydraulic rod (11), a fixed base (12), a support column (13), and a bottom plate hydraulic rod (14).

[0059] The support column (13) is placed on the fixed base (12).

[0060] Preferably, the fixed base (12) is of a rectangular structure.

[0061] Preferably, the support column (13) is located in the middle of the fixed base (12).

[0062] One end of the support column (13) is connected to the fixed base (12), and an avoidance groove is provided at the other end of the support column (13).

[0063] A group of bottom plate hydraulic rods (14) are correspondingly arranged on both sides of the fixed base (12), and a group of the bottom plate hydraulic rods (14) is composed of two bottom plate hydraulic rods (14).

[0064] Preferably, the two bottom plate hydraulic rods (14) in the same group are equidistantly distributed along the side wall of the fixed base (12).

[0065] One end of the bottom plate hydraulic rod (14) is connected to the fixed base (12), and the other end is connected to the movable bottom plate (1).

[0066] The support rod (2) is placed on the movable bottom plate (1).

[0067] Preferably, the support rod (2) is located at the corner of the movable bottom plate (1) away from the bottom plate hydraulic rod (14).

[0068] One end of the support rod (2) is connected to the movable bottom plate (1), and a displacement sensor (3) is arranged at the other end.

[0069] The deviation rectifying hydraulic rod (11) is placed on the movable bottom plate (1), one end of the deviation rectifying hydraulic rod (11) is connected to the movable bottom plate (1), and the other end of the deviation rectifying hydraulic rod (11) is connected with a U-shaped plate with an avoidance function.

[0070] Preferably, the deviation rectifying hydraulic rod (11) is close to the side of the movable bottom plate (1) away from the bottom plate hydraulic rod (14), and the deviation rectifying hydraulic rod (11) and the support column (13) are located on the same straight line.

[0071] A data processor is arranged on the movable bottom plate (1), and a controller is arranged on the deviation rectifying hydraulic rod (11).

[0072] Preferably, the displacement sensor (3) is electrically connected to the data processor, and the data processor is electrically connected to the controller.

[0073] The deviation rectifying assembly is composed of a limiting wheel (4), a limiting shaft (5), a deviation rectifying roller (6), a telescopic rod (7), a telescopic cylinder hinge groove (8), a telescopic cylinder (9), and a limiting shaft hinge groove (10).

[0074] The telescopic cylinder (9) is rotatably arranged at the other end of the support column (13), and a telescopic cylinder hinge groove (8) is formed in the middle of the telescopic cylinder (9).

[0075] Preferably, the telescopic cylinder hinge groove (8) is of an arc structure.

[0076] A hinge part is arranged in the telescopic cylinder hinge groove (8), and the telescopic cylinder (9) is hinged to the other end of the support column (13) through the hinge part.

[0077] Limit rings are correspondingly arranged at both ends of the telescopic cylinder (9), and slidable telescopic rods (7) are correspondingly arranged at both ends of the telescopic cylinder (9).

[0078] Preferably, the telescopic cylinder (9) is of a rectangular structure, and the limit rings are of a circular structure.

[0079] Preferably, one end of the telescopic rod (7) passes through the corresponding limit ring and extends into the telescopic cylinder (9).

[0080] A limit plate is arranged at one end of the telescopic rod (7).

[0081] Preferably, the limit plate is of a rectangular structure and corresponds to the limit ring.

[0082] The deviation rectifying roller (6) is sleeved on the other end of the telescopic rod (7), and the deviation rectifying roller (6) is rotatably connected to the telescopic rod (7) through a rotating bearing.

[0083] The other end of the telescopic rod (7) extends outwards through the deviation rectifying roller (6), and the other end of the telescopic rod (7) is connected to the limiting shaft (5).

[0084] Preferably, one end of the limiting shaft (5) is bent at an obtuse angle with the telescopic rod (7), and then extends obliquely upwards to the other end.

[0085] A limiting shaft hinge groove (10) is formed on the limiting shaft (5).

[0086] Preferably, the limiting shaft hinge groove (10) is of an arc structure, and the limiting shaft hinge groove (10) is close to one end of the limiting shaft (5).

[0087] An articulated part is arranged inside the limiting shaft hinge groove (10), and the limiting shaft (5) is articulated with the U-shaped plate at the other end of the deviation rectifying hydraulic rod (11) through the articulated part.

[0088] A limiting wheel (4) is sleeved on the other end of the limiting shaft (5), and the limiting wheel (4) is rotationally connected with the limiting shaft (5) through a rotating bearing.

[0089] Preferably, the limiting wheel (4) is of a cylindrical structure, and the diameter of the limiting wheel (4) gradually increases in an arc shape from the middle to both ends.

[0090] Preferably, the height of one end of the limiting wheel (4) close to the deviation rectifying roller (6) is lower than the height of the deviation rectifying roller (6).

[0091] Preferably, the deviation rectifying roller (6) is made of styrene-butadiene rubber material. Styrene-butadiene rubber is also known as polystyrene-butadiene copolymer. Its physical mechanical properties, processing properties and service properties of the products are close to those of natural rubber. Some properties such as wear resistance, heat resistance, aging resistance and vulcanization speed are more excellent than those of natural rubber, and it can be used in combination with natural rubber and various synthetic rubbers.

[0092] Preferably, the limiting wheel (4) is made of styrene-butadiene rubber material.

[0093] A deviation rectifying method for a belt conveyor based on the offset change amount of the present invention includes the following steps:

[0094] 1) Place this deviation rectifying device under the belt conveyor frame.

[0095] 2) Start the bottom plate hydraulic rod (14). The telescopic movement of the bottom plate hydraulic rod (14) drives the movable bottom plate (1) to adjust its position, so that the displacement sensor (3) on the movable bottom plate (1) is located on both sides of the conveyor belt and there is a gap between it and the edge of the conveyor belt.

[0096] 3) Start the displacement sensor (3) to monitor the distance between it and the edge of the conveyor belt.

[0097] 4) Place a cushion plate on the movable bottom plate (1) so that the deviation rectifying roller (6) contacts the bottom of the conveyor belt and the end of the deviation rectifying roller (6) extends out of the conveyor belt.

[0098] 5) When the conveyor belt deviates, the conveyor belt will touch the limiting wheel (4). Under the action of the limiting wheel (4), the further deviation of the conveyor belt is blocked.

[0099] 6) During the offset process of the conveyor belt, the distance monitored by the displacement sensor (3) changes, and the displacement sensor (3) sends the distance information to the data processor on the movable base plate (1).

[0100] 7) The signal conversion module of the data processor receives the distance information from the displacement sensor (3) and performs signal conversion. The data processing module of the data processor compares and analyzes the distance value after signal conversion with the set initial distance value to obtain the offset change amount of the conveyor belt. The data processor sends a deviation correction signal to the controller according to the offset change amount.

[0101] 8) After receiving the deviation correction signal, the controller generates a corresponding deviation correction instruction to control the deviation correction telescopic rod (7) for the conveyor belt offset direction to extend, thereby driving the adjacent deviation correction roller (6) to lift upward, and the other deviation correction hydraulic rod (11) to contract, and the other deviation correction roller (6) to deflect downward. During this process, synchronous rotation also occurs between the telescopic cylinder (9) and the support column (13). Under the lifting action of the deviation correction roller (6), the conveyor belt is adjusted.

[0102] Preferably, when the distance monitored by the displacement sensor (3) returns to the initial value, the controller controls the deviation correction hydraulic rod (11) and the deviation correction roller (6) to return to their original positions.

[0103] The design that the two base plate hydraulic rods (14) in the same group are equidistantly distributed along the side wall of the fixed base (12) can make the base plate hydraulic rod (14) more stable when telescoping to adjust the movable base plate (1) to adapt to conveyor belts of different specifications.

[0104] The design that the support rod (2) is located at the corner of the movable base plate (1) far from the base plate hydraulic rod (14) can facilitate the displacement sensor (3) to monitor the offset change amount of the conveyor belt, and at the same time does not affect the normal operation of the limit wheel (4) and the deviation correction roller (6).

[0105] The deviation correction hydraulic rod (11) is close to the side of the movable base plate (1) far from the base plate hydraulic rod (14), and the design that the deviation correction hydraulic rod (11) and the support column (13) are on the same straight line can enable the deviation correction hydraulic rod (11) to smoothly drive the deviation correction roller (6) to deflect up and down to adjust the conveyor belt and will not be stuck.

[0106] The design that the telescopic cylinder hinge groove (8) is an arc-shaped structure can avoid the support column (13), and enable the telescopic cylinder (9) to rotate synchronously during deviation correction.

[0107] The telescopic cylinder (9) is of a rectangular structure, and the design of the limiting plate as a rectangular structure can prevent the telescopic rod (7) from rotating due to the friction between it and the bearing when the deviation-correcting roller (6) rotates with the conveyor belt, so that the limiting wheel (4) on the limiting shaft (5) connected to the telescopic rod (7) also deflects, affecting its limiting function when the conveyor belt deviates;

[0108] The design that one end of the telescopic rod (7) passes through the corresponding limiting ring and extends into the telescopic cylinder (9) can synchronously expand and contract when adjusting the movable bottom plate (1) to adapt to conveyor belts of different specifications, enabling the deviation-correcting roller (6) to better correct the deviation of the conveyor belt;

[0109] The design that one end of the limiting shaft (5) is bent at an obtuse angle with the telescopic rod (7) and then extends obliquely upward to the other end can make the limiting wheel (4) placed obliquely, which is more conducive to buffering and limiting the conveyor belt when it deviates, preventing the conveyor belt from running off track severely;

[0110] The limiting shaft hinge groove (10) is of an arc-shaped structure. The design of the limiting shaft hinge groove (10) near one end of the limiting shaft (5) can avoid the deviation-correcting hydraulic rod (11), enabling the deviation-correcting roller (6) to deflect up and down smoothly to correct the deviation of the conveyor belt;

[0111] The limiting wheel (4) is of a cylindrical structure, and the design that the diameter of the limiting wheel (4) gradually increases in an arc shape from the middle to both ends is more conducive to buffering and limiting the deviated conveyor belt, preventing the conveyor belt from running off track severely;

[0112] The fixed base (12) cooperates with the base hydraulic rod to adjust the movable bottom plate (1) to adapt to conveyor belts of different specifications;

[0113] The support rod (2) cooperates with the displacement sensor (3) to measure the deviation change amount of the conveyor belt, facilitating the correction of the conveyor belt according to the deviation change amount,

[0114] The deviation-correcting roller (6) cooperates with the limiting shaft (5) to drive the deviation-correcting roller (6) to deflect up and down to straighten the conveyor belt;

[0115] It achieves the purpose that the deviation-correcting device adapts to conveyor belts of different specifications, and at the same time, according to the measured deviation change amount, drives the deviation-correcting roller (6) to deflect through the deviation-correcting hydraulic rod (11) to correct the deviation of the conveyor belt.

[0116] It should be noted that, unless otherwise clearly specified and defined, the terms "placed", "connected", and "joined" should be understood in a broad sense. For example, it can be fixed connection methods such as hemmed connection, rivet connection, pin connection, adhesive connection, and welded connection, or detachable connection methods such as threaded connection, snap connection, and hinge connection, or integral connection, or electrical connection, or directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0117] The above embodiments are preferred embodiments of the present invention. For the sake of saving space, the applicant has not added other embodiments, but this is not intended to limit the scope of implementation of the present invention. Any person of ordinary skill in the art, without departing from the scope of the present invention, can make some improvements, that is, all equivalent improvements made in accordance with the present invention should be covered by the scope of the present invention.

Claims

1. A belt conveyor deviation rectification device based on the offset change amount, characterized in that: It is composed of a support component and a deviation rectification component. The support component consists of a movable bottom plate, a support rod, a displacement sensor, a deviation rectification hydraulic rod, a fixed base, a support column, and a bottom plate hydraulic rod. The support column is placed on the fixed base. The fixed base is of a rectangular structure. The support column is located in the middle of the fixed base. One end of the support column is connected to the fixed base. An avoidance groove is opened at the other end of the support column. A group of bottom plate hydraulic rods are correspondingly arranged on both sides of the fixed base. A group of the bottom plate hydraulic rods consists of two bottom plate hydraulic rods. One end of the bottom plate hydraulic rod is connected to the fixed base, and the other end is connected to the movable bottom plate. The support rod is placed on the movable bottom plate. One end of the support rod is connected to the movable bottom plate, and a displacement sensor is placed at the other end. The deviation rectification hydraulic rod is placed on the movable bottom plate. One end of the deviation rectification hydraulic rod is connected to the movable bottom plate, and the other end of the deviation rectification hydraulic rod is connected to a U-shaped plate with an avoidance function. A data processor is placed on the movable bottom plate. A controller is placed on the deviation rectification hydraulic rod. The displacement sensor and the data processor are electrically connected. The data processor and the controller are electrically connected. The deviation rectification component consists of a limit wheel, a limit shaft, a deviation rectification roller, a telescopic rod, a telescopic cylinder hinge groove, a telescopic cylinder, and a limit shaft hinge groove. The telescopic cylinder is rotatably placed on the other end of the support column. A telescopic cylinder hinge groove is opened in the middle of the telescopic cylinder. A hinge part is placed in the telescopic cylinder hinge groove. The telescopic cylinder is hinged to the other end of the support column through the hinge part. Limit rings are correspondingly arranged at both ends of the telescopic cylinder. Telescopic rods that can slide are correspondingly arranged at both ends of the telescopic cylinder. The limit ring is of a circular structure. A limit plate is placed at one end of the telescopic rod. The limit plate corresponds to the limit ring. The deviation rectification roller is sleeved on the other end of the telescopic rod. The deviation rectification roller and the telescopic rod are rotationally connected through a rotating bearing. The other end of the telescopic rod extends outwards through the deviation rectification roller. The other end of the telescopic rod is connected to the limit shaft. A limit shaft hinge groove is opened on the limit shaft. The limit shaft hinge groove is of an arc structure. The limit shaft hinge groove is close to one end of the limit shaft. A hinge part is placed in the limit shaft hinge groove. The limit shaft is hinged to the U-shaped plate at the other end of the deviation rectification hydraulic rod through the hinge part. The limit wheel is sleeved on the other end of the limit shaft. The limit wheel and the limit shaft are rotationally connected through a rotating bearing.

2. The deviation rectifying device of the belt conveyor based on the offset change amount according to claim 1, characterized in that The two bottom plate hydraulic rods in the same group are equidistantly distributed along the side wall of the fixed base, which can make the bottom plate hydraulic rod expand and contract to adjust the movable bottom plate to adapt to different specifications of conveyor belts more stably.

3. The belt conveyor deviation rectifying device based on the offset change amount according to claim 1, characterized in that The support rod is located at the corner of the movable bottom plate far from the bottom plate hydraulic rod, which can facilitate the displacement sensor to monitor the offset change amount of the conveyor belt and does not affect the normal operation of the limit wheel and the deviation rectification roller at the same time.

4. The belt conveyor deviation rectifying device based on the offset change amount according to claim 1, characterized in that The deviation rectification hydraulic rod is close to the side of the movable bottom plate far from the bottom plate hydraulic rod. The deviation rectification hydraulic rod and the support column are on the same straight line, which can make the deviation rectification hydraulic rod smoothly drive the deviation rectification roller to deflect up and down to adjust the conveyor belt and will not be stuck.

5. The belt conveyor deviation rectifying device based on the offset change amount according to claim 1, wherein The telescopic cylinder hinge groove is of an arc structure, which can avoid the support column and enable the telescopic cylinder to rotate synchronously during deviation rectification.

6. The belt conveyor deviation rectification device based on the offset change amount according to claim 5, characterized in that The telescopic cylinder is of a rectangular structure. The design that the limiting plate is of a rectangular structure can prevent the telescopic rod from rotating due to the friction between the telescopic rod and the bearing when the deviation rectifying roller rotates along with the conveyor belt, so that the limiting wheel on the limiting shaft connected to the telescopic rod also deflects, affecting its limiting function when the conveyor belt deviates.

7. The belt conveyor deviation rectifying device based on the offset change amount according to claim 1, characterized in that One end of the telescopic rod passes through the corresponding limiting ring and extends into the telescopic cylinder, and can synchronously expand and contract when adjusting the movable bottom plate to adapt to conveyor belts of different specifications.

8. The belt conveyor deviation rectifying device based on the offset change amount according to claim 1, wherein One end of the limiting shaft is bent at an obtuse angle with the telescopic rod and then extends obliquely upward to the other end, which can make the limiting wheel placed obliquely, more conducive to buffering and limiting the conveyor belt when it deviates, and preventing the conveyor belt from running off severely.

9. The deviation rectifying device for a belt conveyor based on the offset change amount according to claim 1, wherein The limiting wheel is of a cylindrical structure. The diameter of the limiting wheel gradually increases in an arc shape from the middle to both ends. The height of one end of the limiting wheel close to the deviation rectifying roller is lower than the height of the deviation rectifying roller.

10. A deviation rectification method for a deviation rectification device of a belt conveyor based on an offset change amount as described in any one of claims 1-9, Its characteristics include the following steps: 1) Place this deviation rectifying device under the frame of the belt conveyor; 2) Start the bottom plate hydraulic rod. The expansion and contraction of the bottom plate hydraulic rod drives the movable bottom plate to adjust its position, so that the displacement sensors on the movable bottom plate are located on both sides of the conveyor belt and there is a gap between them and the edge of the conveyor belt; 3) Start the displacement sensors to monitor the distance between them and the edge of the conveyor belt; 4) Place a cushion plate on the movable bottom plate so that the deviation rectifying roller contacts the bottom of the conveyor belt and the end of the deviation rectifying roller extends out of the conveyor belt; 5) When the conveyor belt deviates, the conveyor belt will touch the limiting wheel. Under the action of the limiting wheel, the further deviation of the conveyor belt is blocked; 6) During the deviation of the conveyor belt, the distance monitored by the displacement sensors changes, and the displacement sensors send the distance information to the data processor on the movable bottom plate; 7) The signal conversion module of the data processor receives the distance information from the displacement sensors and conducts signal conversion. The data processing module of the data processor compares and analyzes the distance value after signal conversion with the set initial distance value to obtain the deviation change amount of the conveyor belt. The data processor sends the deviation rectifying signal to the controller according to the deviation change amount; 8) After receiving the deviation rectifying signal, the controller generates a corresponding deviation rectifying instruction, controls the deviation rectifying telescopic rod in the deviation direction of the conveyor belt to extend, thereby driving the adjacent deviation rectifying roller to lift upward, and the other deviation rectifying hydraulic rod contracts, and the other deviation rectifying roller deflects downward. During this process, synchronous rotation also occurs between the telescopic cylinder and the support column. Under the lifting action of the deviation rectifying roller, the conveyor belt is adjusted. When the distance monitored by the displacement sensors returns to the initial value, the controller controls the deviation rectifying hydraulic rod and the deviation rectifying roller to return to their original positions.

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