Pipe belt machine with heating function and pipe belt machine anti-deviation control system

Abstract

The application discloses a pipe belt machine with a heating function and a pipe belt machine anti-deviation control system. The pipe belt machine comprises a plurality of supporting rollers, a plurality of rollers and a conveying belt arranged between the supporting rollers and the rollers. Each of the supporting rollers comprises a supporting roller body and a supporting roller support, and the supporting roller body is rotatably arranged on the supporting roller support. Each of the rollers comprises a roller body and a roller support, and the roller body is rotatably arranged on the roller support. An induction heating coil is arranged in each of the supporting roller body and the roller body. The induction heating coil is used for generating a high-frequency alternating magnetic field through input of an alternating current, and the high-frequency alternating magnetic field can penetrate the outer layer of the conveying belt and act on the steel wire rope core, so that the steel wire rope core of the conveying belt generates heat and the conveying belt is heated. The pipe belt machine is heated through electromagnetic eddy current, thereby effectively solving the problem that the pipe belt machine is difficult to start in severe cold weather.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of belt conveyors, in particular to a pipe belt conveyor with heating function. The present application also relates to a pipe belt conveyor anti-deviation control system. BACKGROUND

[0002] The belt conveyor has been widely used in the metallurgical, steel, coal and other industries at home and abroad due to its simple structure, wide range of conveyed materials and large conveying capacity.

[0003] However, in actual production operation, the conveyor often has various problems, which has a great impact on production. In particular, the pipe belt conveyor used in the northern region has the problem of freezing and sticking of the conveyor belt and the carrier roller due to low temperature, and the flexibility of the conveyor belt is poor, so it often cannot be started at night or early morning. The pipe belt conveyor operator often has no way to solve the problem, and there are only the following two ways to solve the problem:

[0004] One is to wait for the temperature to rise and then start the pipe belt conveyor, which limits the normal start of the pipe belt conveyor only during the daytime when the temperature rises, seriously affecting the flexibility and production time of production, which is obviously a helpless way of handling.

[0005] The other is to forcibly increase the motor power to break the frozen and stuck state by relying on the powerful driving force of the motor to make the carrier roller and the conveyor belt start running. The disadvantage of this method is that, on the one hand, the motor selection requirement is high, and the corresponding supporting facilities (roller, speed reducer, coupling, brake, etc.) are also increased accordingly, which greatly increases the cost, and increases the cost investment in the intangible; on the other hand, it is forced to start in the unfrozen state by relying on "brute force", which is easy to cause damage to the conveyor belt and the carrier roller, especially the conveyor belt, which will seriously affect the service life of the conveyor belt if it is forced to twist and deform under the condition of poor flexibility.

[0006] In addition, under cold weather conditions, the conveyor belt will cause the pipe belt conveyor to deviate due to excessive lateral rigidity. SUMMARY

[0007] The purpose of the present application is to provide a pipe belt conveyor with heating function. The pipe belt conveyor is used to solve the problem that the pipe belt conveyor and the carrier roller and other equipment are difficult to start due to frost and freezing in severe cold weather or large diurnal temperature difference environment. The pipe belt conveyor is heated by electromagnetic eddy current, thereby effectively solving the problem that the pipe belt conveyor is difficult to start in severe cold weather.

[0008] To achieve the above purpose, the present application provides a pipe belt conveyor anti-deviation control system to solve the problem of deviation of the pipe belt conveyor running in severe cold weather.

[0009] To achieve the aforementioned first objective, this application provides a belt conveyor with a heating function, comprising idlers, rollers, and a conveyor belt disposed on the idlers and rollers; each idler includes an idler body and an idler bracket, the idler body being rotatably mounted on the idler bracket; each roller includes a roller body and a roller bracket, the roller body being rotatably mounted on the roller bracket; each idler body and roller body is provided with an induction heating coil inside, the induction heating coil being used to generate a high-frequency alternating magnetic field by inputting an alternating current, and the high-frequency alternating magnetic field being able to penetrate the outer layer of the conveyor belt and act on the steel wire rope core, so as to heat the steel wire rope core of the conveyor belt and thus heat the conveyor belt.

[0010] In one embodiment, the number of induction heating coils for each of the idler rollers and drums is multiple, and the multiple induction heating coils are distributed at intervals along the axial direction of the idler rollers and drums.

[0011] In one embodiment, the axes of the idler roller and the drum are perpendicular to the plane containing the induction heating coil.

[0012] In one embodiment, each of the induction heating coils is in the shape of a flat helix.

[0013] In one embodiment, each of the idler rollers and drums is provided with three induction heating coils, one on the left, one in the middle, and one on the right.

[0014] In one embodiment, the induction heating coils of each of the idler rollers and drums are connected in series in the circuit.

[0015] In one embodiment, the conveyor belt is divided into a closed conveyor section and an open conveyor section. In the closed conveyor section, multiple idlers are provided, and the multiple idlers at each location form a group of idlers. The group of idlers wraps the conveyor belt, which is deformed into a tubular shape.

[0016] In one embodiment, a high-frequency alternating current power supply is further included, which is electrically connected to the induction heating coil.

[0017] In one embodiment, the high-frequency alternating current power supply includes a rectifier and a high-frequency power conversion device; the rectifier is used to convert alternating current into direct current, and the high-frequency power conversion device is used to convert direct current into high-frequency alternating current exceeding the audio frequency.

[0018] To achieve the aforementioned other objective, this application provides a belt conveyor anti-deviation control system for a belt conveyor with heating function as described in any of the above technical solutions. The turning section of the belt conveyor is divided into multiple segments, and the control system has functions corresponding to each segment:

[0019] The belt misalignment detection unit is used to detect whether the conveyor belt is misaligned and to provide feedback to the central control system;

[0020] A temperature detection unit is used to detect the temperature of the conveyor belt and feed it back to the central control system;

[0021] The central control system is used to receive the detection signals from the belt misalignment detection unit and the temperature detection unit, and control the induction heating coil of the conveyor belt machine. If misalignment occurs, the current is increased to raise the temperature until the conveyor belt returns to the allowable range of misalignment and resumes normal operation. If the conveyor belt temperature is higher than the set value, the current is disconnected or reduced.

[0022] The belt conveyor with heating function provided in this application addresses the problem of belt conveyors being difficult to start in cold weather by installing induction heating coils inside the idlers and drums. When startup is required, an alternating current is input to the induction heating coils to generate a high-frequency alternating magnetic field. This magnetic field penetrates the outer layer of the conveyor belt and acts on the steel cord core, generating electromagnetic eddy currents. This heats the steel cord core of the conveyor belt, effectively solving the problem of freezing and sticking of the conveyor belt, idlers, drums, and other components. It ensures continuous production while achieving energy savings and reduced consumption. The structure is simple, effective, and highly practical, and it does not damage the conveyor belt, thus extending its service life.

[0023] The belt conveyor anti-deviation control system provided in this application is equipped with a deviation detection unit, a temperature detection unit, and a central control system corresponding to each turning section of the belt conveyor. In cold weather conditions, by heating the conveyor belt at the turning point in a segmented manner, the lateral rigidity of the conveyor belt can be reduced, thereby effectively preventing the conveyor belt from deviating and solving the problem of belt deviation caused by excessive lateral rigidity of the conveyor belt at the turning section of the belt conveyor. Attached Figure Description

[0024] Figure 1 A schematic cross-sectional view of a tube conveyor with heating function provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the idler roller shown;

[0026] Figure 3 for Figure 2 View AA of the induction heating coil shown;

[0027] Figure 4 A schematic diagram of the electromagnetic eddy current phenomenon where a high-frequency alternating magnetic field of a single idler roller penetrates the outer layer of the conveyor belt and acts on the core of the wire rope.

[0028] Figure 5A schematic diagram of the electromagnetic eddy current phenomenon where the high-frequency alternating magnetic field of the six idlers penetrates the outer layer of the conveyor belt and acts on the core of the steel wire rope.

[0029] Figure 6 This is a schematic diagram of the structure of the drum of the tube conveyor.

[0030] Figure 7 This is a schematic diagram of a pipe conveyor anti-deviation control system provided in an embodiment of this application.

[0031] In the picture:

[0032] 90. Full support frame; 100. Idler roller; 110. Idler roller body; 120. Idler roller bracket; 130. High-frequency alternating current power supply; 140. Induction heating coil; 150. Magnetic lines; 200. Roller; 210. Roller body; 220. Roller bracket; 300. Conveyor belt; 310. Steel wire rope core; 410. Belt misalignment detection unit; 420. Temperature detection unit; 430. Central control system. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0035] Please refer to Figure 1 , Figure 1 This is a schematic cross-sectional view of a tube conveyor with heating function provided in an embodiment of this application.

[0036] As shown in the figure, in one specific embodiment, the tubular belt conveyor (i.e., tubular belt conveyor) provided in this application is a type of belt conveyor. Its main principle is that idlers 100 arranged in a hexagonal cross-section wrap the conveyor belt 300 around its edges, overlapping each other to form a circular tube to transport materials. It features characteristics such as being less prone to spillage during transportation, being able to be flexibly arranged along spatial curves, and having a long single-machine transportation distance.

[0037] The head, tail, receiving point, unloading point, and tensioning device of the tubular belt conveyor are structurally similar to those of a regular belt conveyor. The difference lies in the fact that after receiving material at the tail transition section, the conveyor belt 300 gradually rolls it into a cylindrical shape for sealed material transport. At the head transition section, it gradually unfolds until unloading. It can be widely used for continuous transport of various bulk materials. The transported material is surrounded within the cylindrical conveyor belt 300, preventing material from scattering or flying. The material is also not affected by the external environment due to wind or rain. This avoids both environmental pollution caused by material scattering and external environmental contamination of the material, achieving leak-free sealed transport.

[0038] Belt conveyors typically use a dedicated conveyor belt 300. Depending on the required tension and other conditions, the conveyor belt 300 can be made with a nylon fabric core or a steel cord core. The selection of the conveyor belt specifications must consider factors such as the maximum tension value of the conveyor belt 300, the conveying distance, the operating conditions, and the safety factor. In this embodiment, in order to heat the conveyor belt 300 using an induction heating coil, the conveyor belt 300 is a steel cord core conveyor belt with an outer rubber belt layer.

[0039] Along the conveying direction, the conveyor belt 300 is divided into a closed conveying section and a non-closed conveying section. In the closed conveying section of the conveyor belt 300, the tubular conveyor will install a set of idlers 100 on the full bracket 90 of the bearing section of the tubular conveyor truss at certain intervals. The idler arrangement of the tubular conveyor adopts a 6 / 0 type structure, that is, each set of idlers consists of six idlers 100, and the six idlers 100 form a circle to wrap around the tubular conveyor belt 300. The upper half of the full bracket 90 shown in the figure is a set of idlers for the outbound section, and the lower half is a set of idlers for the return section.

[0040] Please refer to Figure 2 , Figure 3 , Figure 2 for Figure 1 A schematic diagram of the structure of the idler roller shown; Figure 3 for Figure 2 The image shows an AA view of the induction heating coil.

[0041] As shown in the figure, each idler roller 100 is mainly composed of an idler roller body 110 and an idler roller bracket 120. The idler roller body 110 is rotatably mounted on the idler roller bracket 120. An induction heating coil 140 is installed inside the idler roller body 110. The induction heating coil 140 is used to generate a high-frequency alternating magnetic field by inputting an alternating current. The high-frequency alternating magnetic field can penetrate the outer layer of the conveyor belt 300 and act on the wire rope core 310, so as to heat up the wire rope core 310 of the conveyor belt 300 and heat the conveyor belt 300.

[0042] Specifically, in this embodiment, each roller body 110 contains three induction heating coils 140. The three induction heating coils 140 are distributed at intervals along the axial direction of the roller body 110, located at the left, middle, and right positions respectively. The axial direction of the roller body 110 is perpendicular to the plane where the induction heating coils 140 are located. Each induction heating coil 140 is in a flat spiral shape. The three induction heating coils 140 can be connected in series with each other in the circuit.

[0043] In order to install the induction heating coil 140, the interior of the roller body 110 can be designed as a hollow structure and equipped with a coil support or coil slot, so as to stably hold the induction heating coil 140 inside the roller body 110 through the coil support or coil slot, so as to avoid the induction heating coil 140 from shifting or deforming during use.

[0044] A high-frequency alternating current power supply 130 is electrically connected to an induction heating coil 140 to apply current to the induction heating coil 140.

[0045] The high-frequency alternating current power supply 130 is equipped with a rectifier and a high-frequency power conversion device. The rectifier is used to convert AC power into DC power, and the high-frequency power conversion device is used to convert DC power into high-frequency AC power that exceeds the audio frequency.

[0046] Please refer to Figure 4 , Figure 5 , Figure 4 A schematic diagram of the electromagnetic eddy current phenomenon where a high-frequency alternating magnetic field of a single idler roller penetrates the outer layer of the conveyor belt and acts on the core of the wire rope. Figure 5 A schematic diagram of the electromagnetic eddy current phenomenon where the high-frequency alternating magnetic field of the six idlers penetrates the outer layer of the conveyor belt and acts on the core of the steel wire rope.

[0047] During operation, according to Faraday's law of electromagnetic induction, when a block conductor is placed in an alternating magnetic field or moves within a fixed magnetic field, an induced current is generated within the conductor, and this current flows in a closed loop within the conductor. The eddy currents inside the conductor also generate heat; if the conductor's resistivity is low, the generated eddy currents are very strong, and the generated heat is substantial. By using a sufficiently large amount of electricity to generate large eddy currents in the conductor, the current within the conductor can generate heat, causing the metal to heat up or even melt.

[0048] The alternating current voltage is converted into direct current by a rectifier, and then into high-frequency alternating current exceeding the audio frequency by a high-frequency power conversion device. This high-frequency alternating current is applied to the flat, hollow, spiral induction heating coils 140 on the left, middle, and right sides of the idler roller 100, thereby generating a high-frequency alternating magnetic field. The magnetic lines of force 150 penetrate the outer layer of the conveyor belt 300 and act on the wire rope core 310. In this way, a strong eddy current is generated within the conveyor belt due to electromagnetic induction. As the eddy currents overcome the internal resistance of the wire rope core 310 and flow, they complete the conversion of electrical energy into heat energy. The resulting Joule heat is the heat source for the entire conveyor belt.

[0049] By controlling the magnitude of the AC power, the induction heating coil 140 inside the idler roller 100 is activated before the conveyor belt is started. This heats the entire conveyor belt (including the conveyor belt 300, idler roller 100, and lubricating oil in the roller bearings, as well as thawing frost and sticking on various parts of the conveyor belt) from below -10 or even tens of degrees Celsius to above zero or even room temperature, such as 20°C. This reduces the starting coefficient of the conveyor belt and then starts the conveyor belt, greatly improving the starting efficiency of the conveyor belt. This allows the conveyor belt to start at any time in cold weather, effectively solving the problem of the conveyor belt being difficult or unable to start in cold weather.

[0050] This invention can also reduce the model selection of conveyor belt equipment. Currently, the selection of technical models takes into account a large start-up coefficient. After applying the technical solution of this application, this coefficient can be reduced, especially the problem of the large start-up coefficient of conveyor belts in cold weather.

[0051] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the drum of the tube conveyor.

[0052] As shown in the figure, in addition to the full line idler group, the conveyor belt is also equipped with drive and redirection rollers 200 at both ends. In order to improve the heating effect before the conveyor belt starts, the same electromagnetic eddy current idler is also installed in the return section of the conveyor belt in this embodiment. Moreover, the drive and redirection rollers 200 of the conveyor belt are also equipped with induction heating coils 240, so that the entire conveyor belt line is heated as a whole, achieving the expected effect.

[0053] Specifically, the structure and arrangement of the induction heating coils 240 inside the roller 200 are basically the same as those of the idler roller 100. Each roller 200 includes a roller body 210 and a roller support 220. The two ends of the roller body 210 are rotatably mounted on the roller support 220 through bearings. Each roller body 210 has three induction heating coils 240 inside. The three induction heating coils 240 are distributed at intervals along the axial direction of the roller body 210, located at the left, middle, and right positions respectively. The axis of the roller body 210 is perpendicular to the plane where the induction heating coils 240 are located. Each induction heating coil 240 is in a flat spiral shape. The three induction heating coils 240 can be connected in series in the circuit. The induction heating coils 240 generate a high-frequency alternating magnetic field by inputting an alternating current. The high-frequency alternating magnetic field can penetrate the outer layer of the conveyor belt 300 and act on the wire rope core 310, so as to heat the wire rope core 300 of the conveyor belt 300 and heat the conveyor belt 300.

[0054] A high-frequency alternating current power supply 230 is electrically connected to an induction heating coil 240 to apply current to the induction heating coil 240.

[0055] Similarly, the high-frequency alternating current power supply 230 is equipped with a rectifier and a high-frequency power conversion device, wherein the rectifier is used to convert AC power into DC power, and the high-frequency power conversion device is used to convert DC power into high-frequency AC power exceeding the audio frequency.

[0056] Although belt conveyors can be arranged in a curved layout, the excessive lateral rigidity of the conveyor belt at the bends can cause it to easily deviate from its normal position.

[0057] In this regard, this application also provides a belt conveyor anti-deviation control system (see...). Figure 7 This is used in the heating conveyor belt described above. The turning section of the conveyor belt is divided into three segments: the starting arc segment A, the full arc segment B, and the ending arc segment C. The control system has corresponding functions for each segment:

[0058] The belt misalignment detection unit 410 is used to detect whether the conveyor belt 300 is misaligned and to provide feedback to the central control system 430.

[0059] Temperature detection unit 420 is used to detect the temperature of conveyor belt 300 and feed it back to central control system 430;

[0060] The central control system 430 is used to receive the detection signals from the deviation detection unit 410 and the temperature detection unit 420, and to control the induction heating coil 140 of the conveyor belt machine.

[0061] During operation, alternating current is passed into the induction heating coil 140 of the idler roller 100 located at the bend. First, the belt deviation detection unit 410 detects whether the conveyor belt 300 is deviating and feeds back to the central control system 430. If deviation occurs, the current is increased to raise the temperature and reduce the lateral rigidity of the conveyor belt 300 until the conveyor belt 300 returns to the allowable deviation range and operates normally, thereby achieving the purpose of preventing deviation.

[0062] The temperature detection unit 420 is used to protect the conveyor belt 300. A maximum temperature is designed in the temperature detection. When the conveyor belt 300 exceeds this temperature, the alternating current is disconnected or reduced, so that the induction heating coil 140 stops working or reduces its power, thereby achieving the purpose of protecting the conveyor belt machine.

[0063] The first half of the arc-starting segment A is a straight section, and the second half is an arc-shaped section, with the transition point in the middle. The first and second halves of the full arc segment B are both arc-shaped sections. The first half of the arc-ending segment C is an arc-shaped section, and the second half is a straight section, with the transition point in the middle. Because the shapes and stress states of the arc-starting segment A, full arc segment B, and arc-ending segment C are different, the lateral rigidity of the conveyor belt 300 also differs. Therefore, dividing the turning section into three segments and heating each segment separately allows for more precise control. Compared to heating the entire section, this method allows for a more reasonable transition in the lateral rigidity of the conveyor belt 300, avoiding abrupt changes in lateral rigidity, thus effectively protecting the conveyor belt 300 and reducing energy consumption.

[0064] The above embodiments are merely preferred embodiments of this application and are not limited to them. Targeted adjustments can be made according to actual needs to obtain different implementation methods. For example, in addition to the 6 / 0 type structure, the idler arrangement of the conveyor belt can also adopt a 3 / 0 or 4 / 0 structure, that is, each group of idlers consists of three or four idlers 100 arranged in a circle, enclosing the deformed tubular conveyor belt 300, and so on. Since there are many possible implementation methods, they will not be listed here.

[0065] This application is the first to address the problem of conveyor belt machines being difficult or unable to start in cold weather. It introduces idlers 100 and rollers 200 that can generate electromagnetic eddy current effects. Without altering the conveyor belt machine's structure, it effectively solves the problem of freezing and sticking of the conveyor belt 300, idlers 100, and rollers 200 in cold weather, enabling the conveyor belt machine to start at any time without affecting production. This effectively reduces the starting coefficient of the conveyor belt machine, simplifies initial selection, and significantly lowers investment costs. Furthermore, it solves the problem of conveyor belt machine misalignment from a new perspective.

[0066] The heating-function conveyor belt system and its anti-deviation control system provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A belt conveyor anti-deviation control system, used in belt conveyors with heating function, characterized in that, The system includes idler rollers (100), rollers (200), and a conveyor belt (300) disposed on the idler rollers (100) and rollers (200); each idler roller (100) includes an idler body (110) and an idler support (120), the idler body (110) being rotatably mounted on the idler support (120); each roller (200) includes a roller body (210) and a roller support (220), the roller body (210) being rotatably mounted on the idler support (120). The roller support (220) is provided with an induction heating coil (140) inside each of the roller bodies (110) and roller bodies (210). The induction heating coil (140) is used to generate a high-frequency alternating magnetic field by inputting an alternating current. The high-frequency alternating magnetic field can penetrate the outer layer of the conveyor belt (300) and act on the wire rope core (310) to heat up the wire rope core (310) of the conveyor belt (300) and heat the conveyor belt (300). The turning section of the conveyor belt is divided into multiple segments, and the control system has corresponding functions for each segment: The belt misalignment detection unit (410) is used to detect whether the conveyor belt (300) is misaligned and to provide feedback to the central control system (430). Temperature detection unit (420) is used to detect the temperature of conveyor belt (300) and feed it back to central control system (430); The central control system (430) is used to receive the detection signals from the deviation detection unit (410) and the temperature detection unit (420) and control the corresponding induction heating coil (140); if deviation occurs, the current is increased to raise the temperature until the conveyor belt (300) returns to the allowable deviation range and operates normally; if the temperature of the conveyor belt (300) is higher than the set value, the current is disconnected or reduced.

2. The conveyor belt misalignment prevention control system according to claim 1, characterized in that, The number of induction heating coils (140) in each of the roller bodies (110) and the drum body (210) is multiple, and the multiple induction heating coils (140) are distributed at intervals along the axial direction of the roller bodies (110) and the drum body (210).

3. The conveyor belt misalignment prevention control system according to claim 2, characterized in that, The axes of the idler roller (110) and the drum (210) are perpendicular to the plane in which the induction heating coil (140) is located.

4. The conveyor belt anti-deviation control system according to claim 3, characterized in that, Each of the aforementioned induction heating coils (140) is in the shape of a flat spiral.

5. The conveyor belt misalignment prevention control system according to claim 4, characterized in that, Each of the roller body (110) and the drum body (210) is provided with three induction heating coils (140) on the left, middle and right respectively.

6. The conveyor belt misalignment prevention control system according to claim 5, characterized in that, The induction heating coils (140) of each of the roller bodies (110) and drum bodies (210) are connected in series in the circuit.

7. The conveyor belt misalignment prevention control system according to claim 1, characterized in that, The conveyor belt (300) is divided into a closed conveyor section and a non-closed conveyor section. In the closed conveyor section of the conveyor belt (300), there are multiple idlers (100). Each idler consists of multiple idlers (100) forming a ring of idlers. The idlers wrap the conveyor belt (300) which is deformed into a tubular shape.

8. The conveyor belt misalignment control system according to any one of claims 1 to 7, characterized in that, It also includes a high-frequency alternating current power supply (130), which is electrically connected to the induction heating coil (140).

9. The conveyor belt misalignment prevention control system according to claim 8, characterized in that, The high-frequency alternating current power supply (130) includes a rectifier and a high-frequency power conversion device; the rectifier is used to convert AC power into DC power, and the high-frequency power conversion device is used to convert DC power into high-frequency AC power exceeding the audio frequency.

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