Load imbalance detection device for belt conveyor and belt conveyor

Abstract

The utility model discloses a kind of unbalance load detection device and belt conveyor for belt conveyor, it is related to material conveying technical field, wherein, unbalance load detection device includes detection mechanism and two roller mechanisms, each roller mechanism includes base, roller assembly and pressure cover, roller assembly is used to support conveyor belt and can be rolled with conveyor belt cooperation, channel is opened in pressure cover and extends along transverse;Detection mechanism includes weighing frame and two weighing sensors, weighing frame is along transverse and is arranged in two channels and is supported on two longitudinal beams, weighing frame has the accommodating groove of notch mouth upwards, two weighing sensors are all received in accommodating groove and fixed in the groove wall of accommodating groove, two weighing sensors are distributed along transverse interval and respectively correspond two pressure cover settings, each weighing sensor is connected to the top wall of corresponding pressure cover, to hang each roller mechanism in conveying space, effectively realize the unbalance load detection of conveyor belt, and can improve unbalance load detection precision and sensitivity.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, and in particular to an off-center load detection device for a belt conveyor and a belt conveyor. Background Technology

[0002] During the operation of a belt conveyor, uneven material distribution on the conveyor belt can lead to off-center loading, which may cause belt misalignment, accelerated wear, or even equipment damage. Current conveyor belt technologies typically only have weighing functions and lack off-center load detection capabilities, requiring dedicated off-center load detection devices. Some of these devices employ image recognition-based methods; however, in harsh industrial environments with high dust levels and low visibility, the image acquisition quality is poor, resulting in low detection accuracy. Other off-center load detection devices use weighing idlers installed under the conveyor belt, directly mounted to the frame's longitudinal beams via supports, with load cells positioned between the idlers and the supports. When the conveyor belt carries material, the load is transferred to the load cells via the idlers for weight detection. However, because the load cells are directly mounted to the frame's longitudinal beams, vibrations and impacts generated during conveyor belt operation are directly transmitted to the load cells, interfering with the detection signal and reducing accuracy. Utility Model Content

[0003] The main purpose of this invention is to propose an off-center load detection device for belt conveyors and a belt conveyor, aiming to solve the technical problem of low detection accuracy of off-center load detection devices for conveyor belts in the prior art.

[0004] To achieve the above objectives, the present invention proposes an off-center load detection device for detecting off-center loads on belt conveyors. The belt conveyor includes a conveyor belt and a frame. The conveyor belt extends longitudinally, and the frame includes two longitudinal beams spaced laterally, forming a conveying space between the two beams. The off-center load detection device includes a detection mechanism and two idler roller mechanisms. The two idler roller mechanisms are spaced laterally and mirror-image of the longitudinal centerline of the conveyor belt. Both idler roller mechanisms are located within the conveying space. Each idler roller mechanism includes a base, an idler roller assembly, and a pressure cover. The idler roller assembly and pressure cover are longitudinally spaced on the base. The idler roller assembly supports the conveyor belt and can roll in cooperation with it. The pressure cover has openings along the transverse direction... The extended channel has two openings on each side of the pressure hood along the lateral direction, and the two channels of the two pressure hoods are interconnected. The detection mechanism includes a weighing frame and two weighing sensors. The weighing frame passes through the two channels along the lateral direction, and the two ends of the weighing frame pass through the two openings and are supported on two longitudinal beams. The weighing frame has an upward-facing receiving groove. The two weighing sensors are housed in the receiving groove and fixed to the groove wall. The two weighing sensors are distributed laterally and are respectively set for the two pressure hoods. Each weighing sensor includes an elastic body, and the elastic body passes through the groove and is connected to the top wall of the corresponding pressure hood to suspend each idler roller mechanism in the conveying space.

[0005] In one embodiment, the idler mechanism includes two idler assemblies, which are respectively mounted at both ends of the base along the longitudinal direction, and a pressure shroud is located between the two idler assemblies.

[0006] In one embodiment, the idler assembly includes a first roller frame, a second roller frame, a third roller frame, long idlers, and short idlers. The first roller frame, the second roller frame, and the third roller frame are arranged laterally at intervals on the base. The long idlers are rotatably mounted between the first roller frame and the second roller frame. The height of the first roller frame is higher than the height of the second roller frame, so that the long idlers are inclined. The short idlers are rotatably mounted between the second roller frame and the third roller frame. The second roller frame and the third roller frame are at the same height, so that the short idlers are horizontal. In the two idler mechanisms, the two short idlers of the two idler assemblies on the same side are arranged close to each other, and both short idlers roll in contact with the bottom surface of the conveyor belt. The two long idlers roll in contact with the two sides of the conveyor belt, respectively.

[0007] In one embodiment, the base includes a plurality of pad beams spaced laterally and extending longitudinally. The roller assembly also includes a load-bearing beam that extends laterally and is connected to the plurality of pad beams. A first roller frame, a second roller frame, and a third roller frame are mounted laterally spaced on the load-bearing beam.

[0008] In one embodiment, the first roller frame includes a connecting plate, an extending beam, a first bearing plate, and two first end plates. The connecting plate is connected to the end of the pad beam and extends vertically. The extending beam is connected to the side of the connecting plate opposite to the pad beam. The first bearing plate and the two first end plates are both connected to the extending beam, and the two first end plates are respectively disposed at both ends of the first bearing plate along the longitudinal direction. A first roller groove is formed on the first bearing plate. The second roller frame includes a second bearing plate and two second end plates. The second bearing plate and the two second end plates are both connected to the pad beam at the position between the two ends, and the two second end plates are respectively disposed at both ends of the second bearing plate along the longitudinal direction. The second bearing plate has a second roller groove, and the height of the first roller groove is higher than the height of the second roller groove. The third roller frame includes a third bearing plate and two third end plates. The third bearing plate and the two third end plates are connected to the end of the pad beam away from the first roller frame. The two third end plates are respectively located at both ends of the third bearing plate along the longitudinal direction. The third bearing plate has a third roller groove, and the height of the second roller groove is the same as that of the third roller groove. The two ends of the roller shaft of the long idler roller are respectively in rolling engagement with the first roller groove and the second roller groove. The two ends of the roller shaft of the short idler roller are respectively in rolling engagement with the second roller groove and the third roller groove. The roller shafts of the long idler roller and the roller shafts of the short idler roller are distributed at intervals.

[0009] In one embodiment, the upper part of the first support plate has a bent portion, which bends from bottom to top toward the second support plate, and a first roller groove is formed in the bent portion; the second support plate is inclined toward the side of the first support plate, and the roller shaft of the long idler roller is perpendicular to the bent portion and the side of the second support plate toward the first support plate.

[0010] In one embodiment, the weighing frame includes a base plate, two first side plates, two second side plates, and two ear plates. The two first side plates are respectively connected to the two ends of the base plate in the transverse direction. The two second side plates are both connected to the base plate and are respectively disposed on both sides of the base plate in the longitudinal direction. The base plate, the two first side plates, and the two second side plates together form a receiving groove. The two ear plates are respectively connected to the side of the two first side plates away from the receiving groove, and the two ear plates are respectively located outside the two openings and respectively overlap the top of the two longitudinal beams to support the weighing frame on the two longitudinal beams.

[0011] In one embodiment, the ear plate has fastening holes for fastening with the corresponding longitudinal beam; and / or, a reinforcing rib is connected between the ear plate and the corresponding first side plate.

[0012] In one embodiment, the load cell further includes a load-bearing member connected to the end of the elastic body away from the weighing frame, and the load-bearing member is connected to the top wall of the corresponding pressure cover by a plurality of detection bolts, which are arranged in an array.

[0013] In one embodiment, the device includes a conveyor belt, a frame, and the aforementioned off-center load detection device. The conveyor belt extends longitudinally, and the frame includes two longitudinal beams spaced laterally, forming a conveying space between the two longitudinal beams. Two idler mechanisms are respectively supported on both sides of the conveyor belt in the transverse direction and can roll in cooperation with the conveyor belt. A weighing frame is supported on the two longitudinal beams and suspends the two idler mechanisms in the conveying space.

[0014] This invention discloses an off-center load detection device for a belt conveyor and the belt conveyor itself. Two idler mechanisms are respectively supported on both sides of the conveyor belt along its transverse direction. The load on each side of the conveyor belt presses down on the corresponding idler mechanism. The idler mechanism, through a pressure cover, presses down on the elastic body of the corresponding load cell, transferring the weight of the load to the load cell, allowing the load cell to acquire the load weight value on the corresponding side. By comparing the difference in weight values ​​acquired by the two load cells, it is possible to identify whether the load is off-center in the transverse direction. The two idler mechanisms adopt a split, spaced design, ensuring that the pressure processes of the two idler mechanisms are independent, allowing them to weigh the load on each side of the conveyor belt separately. This prevents the load weight values ​​acquired by the two load cells from interfering with each other, thereby achieving off-center load detection of the conveyor belt. The idler assembly is supported at the bottom of the conveyor belt and is connected to the pressure cover via a base. The pressure cover is connected to the elastic body of the load cell, ensuring that the load pressure is effectively transmitted to the load cell. The conveyor belt does not directly contact the detection mechanism, which can significantly reduce the interference of vibration and impact during the operation of the conveyor belt on the measurement of the load cell, effectively improve the accuracy and sensitivity of off-center load detection, and thus more effectively detect the off-center load of the conveyor belt, thereby improving the operational safety of the belt conveyor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of an embodiment of the off-center load detection device provided by this utility model assembled on a conveyor belt; Figure 2 A schematic diagram of an embodiment of the off-center load detection device provided by this utility model; Figure 3 A partial structural schematic diagram of an embodiment of the idler roller mechanism of the off-center load detection device provided by this utility model; Figure 4 A partial structural schematic diagram of an embodiment of the weighing frame of the off-center load detection device provided by this utility model.

[0017] Explanation of icon numbers: 10. Idler roller mechanism; 11. Base; 111. Pad beam; 12. Idler roller assembly; 121. First roller frame; 1211. Connecting plate; 1212. Extending beam; 1213. First bearing plate; 1213a. Bending part; 1214. First end plate; 1215. First groove; 122. Second roller frame; 1221. Second bearing plate; 1222. Second end plate; 1223. Second groove; 123. Third roller frame; 1231. Third bearing plate; 1232. Third end plate; 1233. Three roller troughs; 124. Long idler roller; 125. Short idler roller; 126. Load-bearing beam; 13. Pressure cover; 131. Channel; 20. Detection mechanism; 21. Weighing frame; 211. Base plate; 212. First side plate; 213. Second side plate; 214. Ear plate; 2141. Fastening hole; 2142. Reinforcing rib; 215. Receiving groove; 22. Weighing sensor; 221. Load-bearing component; 222. Detection bolt; 200. Conveyor belt; 201. Frame; 202. Longitudinal beam; 203. Conveying space.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In this utility model, the descriptions of directions such as "up", "down", "front", "back", "left", and "right" are as follows: Figures 1 to 4 The directions shown are for reference only and are used to interpret the location. Figures 1 to 4 The relative positional relationship between the components in the shown posture is such that if the specific posture changes, the directional indication will also change accordingly.

[0023] A common existing method for detecting off-center loads on conveyor belts involves installing weighing idlers beneath the conveyor belt. These idlers are directly mounted to the longitudinal beams of the frame via supports, with a load cell positioned between the idler and the supports. When the conveyor belt carries material, the load is transferred to the load cell via the idler for weight detection. However, because the load cell is directly mounted to the longitudinal beams, vibrations and impacts generated during conveyor belt operation are directly transmitted to the load cell, interfering with the detection signal and reducing detection accuracy.

[0024] This utility model proposes an off-center load detection device for detecting off-center loads on a belt conveyor. The belt conveyor includes a conveyor belt 200 and a frame 201. The conveyor belt 200 extends longitudinally, and the frame 201 includes two longitudinal beams 202 spaced laterally, forming a conveying space 203 between the two longitudinal beams 202. The off-center load detection device includes a detection mechanism 20 and two idler roller mechanisms 10. The two idler roller mechanisms 10 are spaced laterally and mirror-image of the longitudinal centerline of the conveyor belt 200. Both idler roller mechanisms 10 are located within the conveying space 203. Each idler roller mechanism 10 includes a base 11, an idler roller assembly 12, and a pressure cover 13. The idler roller assembly 12 and the pressure cover 13 are mounted longitudinally on the base 11. The idler roller assembly 12 supports the conveyor belt 200 and can roll with the conveyor belt 200. The pressure cover 13 has an opening extending laterally. The pressure cover 13 has two openings of the connecting channel 131 on both sides of the transverse direction; the two channels 131 of the two pressure covers 13 are interconnected; the detection mechanism 20 includes a weighing frame 21 and two weighing sensors 22. The weighing frame 21 passes through the two channels 131 in the transverse direction, and the two ends of the weighing frame 21 pass through two openings and are supported on two longitudinal beams 202. The weighing frame 21 has a receiving groove 215 with the groove opening facing upward. The two weighing sensors 22 are both received in the receiving groove 215 and fixed to the groove wall of the receiving groove 215. The two weighing sensors 22 are distributed at intervals in the transverse direction and are respectively set for the two pressure covers 13. Each weighing sensor 22 includes an elastic body, and the elastic body passes through the groove opening and is connected to the top wall of the corresponding pressure cover 13 to suspend each roller mechanism 10 in the conveying space 203.

[0025] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the off-center load detection device provided by this utility model, assembled on a conveyor belt 200. Figure 2 A schematic diagram of the structure of an embodiment of the off-center load detection device provided by this utility model; Figure 1 and Figure 2 The front-to-back direction in the middle is the longitudinal direction. Figure 1 and Figure 2The left and right directions in the diagram refer to the transverse direction. Each idler assembly 12 is supported at the bottom of the conveyor belt 200 and can roll in cooperation with the conveyor belt 200 during conveying, providing support for the conveyor belt 200 while reducing frictional resistance and ensuring the smooth operation of the conveyor belt 200. The two ends of the weighing frame 21 are respectively supported by the two longitudinal beams 202 of the frame 201. The middle of the weighing frame 21 passes through the two channels 131 connected by the two pressure shrouds 13. The two weighing sensors 22 are fixed in the receiving groove 215, and the two weighing sensors 22 are respectively connected to the top wall of the corresponding pressure shroud 13 through two elastic bodies, so that the weighing frame 21 supports the corresponding pressure shroud 13 through the elastic bodies. The pressure shroud 13 transmits the supporting force to the idler assembly 12 through the base 11, so that the idler assembly 12 provides support for the conveyor belt 200. When the load on the conveyor belt 200 is transferred to the idler assembly 12, the load is transmitted to the pressure cover 13 through the base 11, causing the pressure cover 13 to displace downwards. This displacement is then transmitted to the load cell 22 via an elastic body. The load cell 22 converts the displacement change of the elastic body into an electrical signal to obtain the weight value of the load. Two idler mechanisms 10 are respectively supported on both sides of the conveyor belt 200 along the transverse direction, and the two idler mechanisms 10 are mirror images of the longitudinal axis of the conveyor belt 200. This allows the two load cells to obtain the load distribution on both sides of the conveyor belt 200. By comparing the difference in the load weight values ​​obtained by the two load cells 22, it is possible to identify whether the load is unevenly loaded in the transverse direction, thereby achieving off-center load detection of the conveyor belt 200. Two pressure covers 13 are installed outside the corresponding load cells 22 inside the receiving groove 215 to protect the load cells 22 from dust and vibration. The elastic body of the load cell 22 supports the pressure covers 13 while allowing the pressure covers 13 to move downward under load, ensuring accurate pressure transmission and improving detection accuracy and reliability.

[0026] The off-center load detection device for belt conveyors proposed in this invention uses two idler roller mechanisms 10, which are respectively supported on both sides of the conveyor belt 200 along the transverse direction. The load on both sides of the conveyor belt 200 along the transverse direction can press down on the corresponding idler roller mechanism 10. The idler roller mechanism 10 presses down on the elastic body of the corresponding weighing sensor 22 through the pressure cover 13, so as to transfer the weight of the load to the weighing sensor 22, so that the weighing sensor 22 can obtain the load weight value on the corresponding side. By comparing the difference between the weight values ​​obtained by the two weighing sensors 22, it is possible to identify whether the load is off-center in the transverse direction. The two idler roller mechanisms 10 adopt a split and spaced design, so that the pressing process of the two idler roller mechanisms 10 is independent of each other, and can weigh the load on both sides of the conveyor belt 200 along the transverse direction separately, so that the load weight values ​​obtained by the two weighing sensors 22 do not interfere with each other, thereby realizing the off-center load detection of the conveyor belt 200. The idler assembly 12 is supported at the bottom of the conveyor belt 200. The idler assembly 12 is connected to the pressure cover 13 via the base 11. The pressure cover 13 is connected to the elastic body of the load cell 22, ensuring that the load pressure is effectively transmitted to the load cell 22. The conveyor belt 200 does not directly contact the detection mechanism 20, which can greatly reduce the interference of vibration and impact on the load cell 22 during the operation of the conveyor belt 200, effectively improve the accuracy and sensitivity of off-center load detection, and thus more effectively detect the off-center load of the conveyor belt 200, and improve the operating safety of the belt conveyor.

[0027] In one embodiment, the roller mechanism 10 includes two roller assemblies 12, which are respectively mounted on both ends of the base 11 along the longitudinal direction, and the pressure cover 13 is located between the two roller assemblies 12.

[0028] Understandably, the two idler roller assemblies 12 are respectively installed at both ends of the base 11 along the longitudinal direction, and the pressure cover 13 is fixed to the base 11 and located between the two idler roller assemblies 12. Each idler roller assembly 12 is supported on the bottom of the conveyor belt 200 and rolls in cooperation with the conveyor belt 200 during the conveying process. The arrangement of the two idler roller assemblies 12 at both ends in the longitudinal direction provides the conveyor belt 200 with dual-point support, distributing the load pressure and reducing longitudinal sway and impact. The pressure cover 13 is located between the two idler roller assemblies 12, which can balance the load transmitted by the two idler roller assemblies 12, ensure that the load is evenly transmitted to the weighing sensor 22, eliminate the interference caused by the uneven load of the conveyor belt 200 along the longitudinal direction on the weighing sensor 22, and improve the accuracy and stability of weight measurement.

[0029] In one embodiment, the idler roller assembly 12 includes a first roller frame 121, a second roller frame 122, a third roller frame 123, a long idler roller 124, and a short idler roller 125. The first roller frame 121, the second roller frame 122, and the third roller frame 123 are arranged laterally at intervals on the base 11. The long idler roller 124 is rotatably mounted between the first roller frame 121 and the second roller frame 122. The height of the first roller frame 121 is higher than the height of the second roller frame 122, so that the long idler roller 124 is inclined. The short idler roller 125 is rotatably mounted between the second roller frame 122 and the third roller frame 123. The second roller frame 122 and the third roller frame 123 are at the same height so that the short idler roller 125 is set horizontally. In the two idler roller mechanisms 10, the two short idler rollers 125 of the two idler roller assemblies 12 on the same side are set close to each other, and both short idler rollers 125 roll in contact with the bottom surface of the conveyor belt 200. The two long idler rollers 124 roll in contact with the two sides of the conveyor belt 200 respectively.

[0030] It should be noted that the two idler mechanisms 10 are arranged laterally at intervals, and each idler mechanism 10 has two idler assemblies 12 at both ends along the longitudinal direction. Each idler assembly 12 is arranged close to the idler assembly 12 on the same side of the longitudinal direction in the other idler mechanism 10, and the two short idlers 125 of the two close idler assemblies 12 are close to each other, while the two long idlers 124 are far apart from each other. The long idlers 124 are inclined downward from the end away from the short idlers 125 to the end close to the short idlers 125, so that the two long idlers 124 of the two close idler assemblies 12 respectively abut against the two sides of the conveyor belt 200 along the lateral direction, so as to keep the conveyor belt 200 fixed in the lateral direction and prevent the conveyor belt 200 from moving laterally. The short idler rollers 125 are horizontally arranged and close to each other. The two short idler rollers 125 are respectively supported on both sides of the bottom of the conveyor belt 200 along the transverse direction to provide stable support for the bottom of the conveyor belt 200. The short idler rollers 125 and the long idler rollers 124 work together to maintain the stable operation of the conveyor belt 200, effectively improving the operation stability and safety of the conveyor belt 200.

[0031] In one embodiment, the base 11 includes a plurality of pad beams 111 spaced laterally, each pad beam 111 extending longitudinally. The roller assembly 12 also includes a load-bearing beam 126 extending laterally and connected to the plurality of pad beams 111. A first roller frame 121, a second roller frame 122, and a third roller frame 123 are mounted laterally spaced on the load-bearing beam 126.

[0032] Please see Figure 3Multiple support beams 111 are arranged laterally at intervals to form the supporting foundation of the base 11. A load-bearing beam 126 extends laterally and is fixed to the support beams 111, connecting them into a single unit and enhancing the overall rigidity and stability of the base 11. A first roller frame 121, a second roller frame 122, and a third roller frame 123 are installed laterally at intervals on the load-bearing beam 126, ensuring uniform support for each roller frame and precise installation of the idler roller assembly 12. The load-bearing beam 126, as a lateral load-bearing component, distributes the load from the roller frame to the multiple support beams 111, avoiding stress concentration. The support beams 111 further transfer the load to the pressure cover 13, achieving effective load transfer. In one embodiment, the load-bearing beam 126 is made of downward-facing angle steel, and the support beams 111 are made of downward-facing channel steel; the load-bearing beam 126 and the support beams 111 are welded together.

[0033] In one embodiment, the first roller frame 121 includes a connecting plate 1211, an extension beam 1212, a first bearing plate 1213, and two first end plates 1214. The connecting plate 1211 is connected to the end of the pad beam 111 and extends vertically. The extension beam 1212 is connected to the side of the connecting plate 1211 away from the pad beam 111. The first bearing plate 1213 and the two first end plates 1214 are both connected to the extension beam 1212, and the two first end plates 1214 are respectively disposed at both ends of the first bearing plate 1213 along the longitudinal direction. A first rolling groove 1215 is formed on the first bearing plate 1213. The second roller frame 122 includes a second bearing plate 1221 and two second end plates 1222. The second bearing plate 1221 and the two second end plates 1222 are both connected to the pad beam 111 at the position between the two ends, and the two second end plates 1222 are respectively disposed at both ends of the second bearing plate 1221 along the longitudinal direction. The second bearing plate 1221 has a second rolling groove 1223, and the height of the first rolling groove 1215 is higher than the height of the second rolling groove 1223. The third roller frame 123 includes a third bearing plate 1231 and two third end plates 1232. The third bearing plate 1231 and the two third end plates 1232 are all connected to the end of the pad beam 111 away from the first roller frame 121, and the two third end plates 1232 are respectively located at both ends of the third bearing plate 1231 along the longitudinal direction. The third bearing plate 1231 has a third rolling groove 1233, and the height of the second rolling groove 1223 and the third rolling groove 1233 are the same. The two ends of the roller shaft of the long idler roller 124 are respectively in rolling engagement with the first rolling groove 1215 and the second rolling groove 1223, and the two ends of the roller shaft of the short idler roller 125 are respectively in rolling engagement with the second rolling groove 1223 and the third rolling groove 1233. The roller shafts of the long idler roller 124 and the roller shafts of the short idler roller 125 are distributed at intervals.

[0034] Please continue reading. Figure 3 , Figure 3The vertical direction is defined as the vertical direction. The connecting plate 1211 provides rigid support through vertical extension to raise the installation height of the extension beam 1212. The extension beam 1212 is connected to the connecting plate 1211 and extends laterally to provide an installation position for the first bearing plate 1213. The first bearing plate 1213 supports one end of the roller of the long idler 124 through the first roller groove 1215. The two first end plates 1214 provide lateral support to the first bearing plate 1213 to improve its support stability. The second bearing plate 1221 supports the rollers of both the long idler 124 and the short idler 125 through the second roller groove 1223. The two second end plates 1222 provide lateral constraint to the second bearing plate 1221 to improve its support stability. The third bearing plate 1231 supports the other end of the roller of the short idler 125 through the third roller groove 1233. The height of the first groove 1215 is higher than that of the second groove 1223, causing the long idler roller 124 to be inclined. The short idler roller 125 is kept horizontally installed by the equal height of the second groove 1223 and the third groove 1233. The roller spacing of the long idler roller 124 and the short idler roller 125 disperses the load pressure to each roller frame, reducing local stress; the rolling fit reduces frictional resistance, ensuring the smooth operation of the conveyor belt 200. When a load is applied to the conveyor belt 200, the short idler 125 bears the vertical force and transmits it to the pad beam 111 through the second roller frame 122 and the third roller frame 123. The long idler 124 bears the lateral force and transmits it to the pad beam 111 through the first roller frame 121 and the second roller frame 122. The pad beam 111 transmits the integrated load to the pressure shroud 13 and the load cell 22, making the load distribution of the conveyor belt 200 more uniform, reducing vibration and deformation, ensuring that the displacement of the pressure shroud 13 accurately reflects the load weight, and that the data obtained by the load cell 22 is more accurate, thereby reliably identifying lateral load imbalance.

[0035] In one embodiment, the upper part of the first support plate 1213 has a bent portion 1213a, which bends from bottom to top toward the second support plate 1221, and a first roller groove 1215 is formed in the bent portion 1213a; the second support plate 1221 is inclined toward the side of the first support plate 1213, and the roller of the long idler roller 124 is perpendicular to the bent portion 1213a and the side of the second support plate 1221 toward the first support plate 1213.

[0036] Furthermore, the two ends of the long idler roller 124 form a rolling engagement with the first groove 1215 and the second groove 1223, respectively. Since the roller is perpendicular to the inclined side of the bent portion 1213a and the second support plate 1221, it ensures that the roller is completely aligned with the two contact surfaces during installation, reducing installation errors and uneven wear during operation. The bending angle of the bent portion 1213a matches the inclined angle of the second support plate 1221, providing stable support for the roller of the long idler roller 124 and ensuring that the long idler roller 124 remains stable during rolling.

[0037] In one embodiment, the weighing frame 21 includes a base plate 211, two first side plates 212, two second side plates 213, and two ear plates 214. The two first side plates 212 are respectively connected to the two ends of the base plate 211 in the transverse direction. The two second side plates 213 are both connected to the base plate 211 and are respectively disposed on both sides of the base plate 211 in the longitudinal direction. The base plate 211, the two first side plates 212, and the two second side plates 213 together form a receiving groove 215. The two ear plates 214 are respectively connected to the side of the two first side plates 212 away from the receiving groove 215, and the two ear plates 214 are respectively located outside the two openings and respectively overlap the top of the two longitudinal beams 202 to support the weighing frame 21 on the two longitudinal beams 202.

[0038] Please see Figure 4 The base plate 211, two first side plates 212, and two second side plates 213 together form a receiving groove 215, providing installation space for the two load cells 22, protecting the load cells 22 from dust and external interference, and improving the stability of the measurement signal. Furthermore, an elastic body is located on the upper part of the load cells 22, and the lower part of each load cell 22 is fixedly connected to the base plate 211. The base plate 211 provides support for the load cells 22, keeping the lower part of the load cells 22 fixed, and provides support for the pressure cover 13 through the elastic body. Each ear plate 214 is connected to the outside of the first side plate 212 and extends laterally, allowing the ear plates 214 to directly overlap the top of the longitudinal beam 202 of the frame 201, and evenly transferring the load of the weighing frame 21 to the longitudinal beam 202. When the two ear plates 214 overlap the tops of the two longitudinal beams 202, the two longitudinal beams 202 abut against the two first side plates 212 respectively, thereby confining the weighing frame 21 within the conveying space 203 and preventing the weighing frame 21 from sliding laterally or tilting. It can be noted that the base plate 211, the first side plate 212, and the second side plate 213 are all connected by welding.

[0039] In one embodiment, the ear plate 214 is provided with a fastening hole 2141 for fastening with the corresponding longitudinal beam 202; and / or, a reinforcing rib 2142 is connected between the ear plate 214 and the corresponding first side plate 212.

[0040] Furthermore, when the ear plate 214 overlaps the corresponding longitudinal beam 202, the ear plate 214 can be fastened to the top of the longitudinal beam 202 by fasteners passing through the fastening holes 2141, further improving the connection stability between the ear plate 214 and the longitudinal beam 202, thereby maintaining the fixed connection between the weighing frame 21 and the longitudinal beam 202 and preventing the weighing frame 21 from moving under the vibration of the conveyor belt 200. A reinforcing rib 2142 is connected between the ear plate 214 and the corresponding first side plate 212. The reinforcing rib 2142 can be set between the top surface of the ear plate 214 and the side plate, or between the bottom surface of the ear plate 214 and the side plate. The reinforcing rib 2142 can significantly enhance the rigidity of the connection area between the ear plate 214 and the first side plate 212, improve the bending and torsional resistance of the connection position between the ear plate 214 and the first side plate 212, thereby improving the structural strength of the weighing frame 21.

[0041] In one embodiment, the weighing sensor 22 further includes a load-bearing member 221, which is connected to the end of the elastic body away from the weighing frame 21. The load-bearing member 221 is connected to the top wall of the corresponding pressure cover 13 by a plurality of detection bolts 222, which are arranged in an array.

[0042] It should be noted that the load cell 22 adopts the existing technology, which includes a load-bearing component 221 and an elastic body. The load-bearing component 221 is connected to the top wall of the pressure cover 13 by detection bolts 222. The load-bearing component 221 and the pressure cover 13 are relatively fixed. The load-bearing component 221 can withstand the pressure applied by the pressure cover 13 and transmit the pressure to the elastic body, thereby causing the elastic body to deform. The load-bearing component 221 is fixed to the top wall of the pressure cover 13 by multiple detection bolts 222. The multiple detection bolts 222 are evenly arranged in an array along the top wall surface of the pressure cover 13, forming multiple connection points. This allows the load force of the pressure cover 13 to be distributed and transmitted to the load-bearing component 221 through the multiple detection bolts 222, thereby ensuring uniform force transmission between the pressure cover 13 and the load-bearing component 221, ensuring that the elastic body deforms vertically, and making the deformation of the elastic body more accurately reflect the actual load on the conveyor belt 200, thereby improving the accuracy of off-center load detection.

[0043] This utility model also proposes a belt conveyor, which includes a conveyor belt 200, a frame 201 and an off-center load detection device. The specific structure of the off-center load detection device is as described in the above embodiments. Since this belt conveyor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0044] The conveyor belt 200 extends longitudinally, and the frame 201 includes two longitudinal beams 202 spaced laterally, forming a conveying space 203 between them. Two idler roller mechanisms 10 are respectively supported on both sides of the conveyor belt 200 along the transverse direction and can roll in cooperation with the conveyor belt 200. A weighing frame 21 is supported on the two longitudinal beams 202 and suspends the two idler roller mechanisms 10 in the conveying space 203. The load on both sides of the conveyor belt 200 along the transverse direction can press down on the corresponding idler roller mechanism 10. The idler roller mechanism 10 presses down on the elastic body of the corresponding weighing sensor 22 through the pressure cover 13, so as to transfer the weight of the load to the weighing sensor 22, allowing the weighing sensor 22 to obtain the load weight value on the corresponding side. By comparing the difference in weight values ​​obtained by the two weighing sensors 22, it is possible to identify whether the load is unevenly loaded in the transverse direction, thereby achieving accurate detection of uneven load on the conveyor belt 200.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An off-center load detection device for a belt conveyor, characterized in that, The belt conveyor includes a conveyor belt and a frame. The conveyor belt extends longitudinally, and the frame includes two longitudinal beams spaced apart laterally, forming a conveying space between the two longitudinal beams. The off-center load detection device includes: Two idler roller mechanisms are arranged laterally at intervals and mirror images of the longitudinal centerline of the conveyor belt. Both idler roller mechanisms are located within the conveying space. Each idler roller mechanism includes a base, an idler roller assembly, and a pressure cover. The idler roller assembly and the pressure cover are longitudinally spaced on the base. The idler roller assembly supports the conveyor belt and can roll in cooperation with the conveyor belt. The pressure cover has a channel extending laterally, and two openings connecting the channel are respectively opened on both sides of the pressure cover laterally. The two channels of the two pressure covers are interconnected. The detection mechanism includes a weighing frame and two weighing sensors. The weighing frame extends laterally through the two channels, and its two ends extend through the two openings and are supported on the two longitudinal beams. The weighing frame has an upward-facing receiving groove. The two weighing sensors are housed in the receiving groove and fixed to the groove wall. The two weighing sensors are spaced laterally and are respectively positioned corresponding to the two pressure covers. Each weighing sensor includes an elastic body, which extends through the groove and is connected to the top wall of the corresponding pressure cover to suspend each roller mechanism in the conveying space.

2. The off-center load detection device for a belt conveyor as described in claim 1, characterized in that, The idler mechanism includes two idler assemblies, which are respectively installed at both ends of the base along the longitudinal direction, and the pressure cover is located between the two idler assemblies.

3. The off-center load detection device for a belt conveyor as described in claim 2, characterized in that, The idler assembly includes a first roller frame, a second roller frame, a third roller frame, long idlers, and short idlers. The first roller frame, the second roller frame, and the third roller frame are arranged laterally at intervals on the base. The long idler is rotatably mounted between the first roller frame and the second roller frame. The height of the first roller frame is higher than the height of the second roller frame, so that the long idler is inclined. The short idler is rotatably mounted between the second roller frame and the third roller frame. The second roller frame and the third roller frame are at the same height, so that the short idler is horizontal. In the two idler mechanisms, the two short idlers of the two idler assemblies on the same side are arranged close to each other, and both short idlers roll in contact with the bottom surface of the conveyor belt. The two long idlers roll in contact with the two sides of the conveyor belt, respectively.

4. The off-center load detection device for a belt conveyor as described in claim 3, characterized in that, The base includes a plurality of pad beams spaced laterally, each pad beam extending longitudinally. The roller assembly also includes a load-bearing beam extending laterally and connected to the plurality of pad beams. The first roller frame, the second roller frame, and the third roller frame are mounted laterally spaced on the load-bearing beam.

5. The off-center load detection device for a belt conveyor as described in claim 4, characterized in that, The first roller frame includes a connecting plate, an extension beam, a first bearing plate, and two first end plates. The connecting plate is connected to the end of the pad beam and extends vertically. The extension beam is connected to the side of the connecting plate away from the pad beam. The first bearing plate and the two first end plates are both connected to the extension beam, and the two first end plates are respectively disposed at both ends of the first bearing plate along the longitudinal direction. A first roller groove is formed on the first bearing plate. The second roller frame includes a second bearing plate and two second end plates. The second bearing plate and the two second end plates are both connected to the pad beam at the position between the two ends. The two second end plates are respectively disposed at the two ends of the second bearing plate along the longitudinal direction. A second roller groove is formed on the second bearing plate. The height of the first roller groove is higher than the height of the second roller groove. The third roller frame includes a third bearing plate and two third end plates. The third bearing plate and the two third end plates are both connected to the end of the pad beam away from the first roller frame. The two third end plates are respectively located at both ends of the third bearing plate along the longitudinal direction. A third rolling groove is formed on the third bearing plate. The second rolling groove has the same height as the third rolling groove. The two ends of the long idler roller are in rolling engagement with the first groove and the second groove, respectively, and the two ends of the short idler roller are in rolling engagement with the second groove and the third groove, respectively. The rollers of the long idler roller and the short idler roller are spaced apart.

6. The off-center load detection device for a belt conveyor as described in claim 5, characterized in that, The upper part of the first support plate has a bent portion, which bends from bottom to top toward the second support plate, and the first roller groove is formed in the bent portion; the second support plate is inclined toward the side of the first support plate, and the roller shaft of the long idler roller is perpendicular to the bent portion and the side of the second support plate toward the first support plate.

7. The off-center load detection device for a belt conveyor as described in any one of claims 1 to 6, characterized in that, The weighing frame includes a base plate, two first side plates, two second side plates, and two ear plates. The two first side plates are respectively connected to the two ends of the base plate in the transverse direction. The two second side plates are both connected to the base plate and are respectively disposed on both sides of the base plate in the longitudinal direction. The base plate, the two first side plates, and the two second side plates together form the receiving groove. The two ear plates are respectively connected to the side of the two first side plates away from the receiving groove, and the two ear plates are respectively located outside the two openings and respectively overlap the top of the two longitudinal beams to support the weighing frame on the two longitudinal beams.

8. The off-center load detection device for a belt conveyor as described in claim 7, characterized in that, The ear plate is provided with fastening holes for fastening with the corresponding longitudinal beam; And / or, a reinforcing rib is connected between the ear plate and the corresponding first side plate.

9. The off-center load detection device for a belt conveyor as described in any one of claims 1 to 6, characterized in that, The weighing sensor also includes a load-bearing component, which is connected to the end of the elastic body away from the weighing frame. The load-bearing component is connected to the top wall of the corresponding pressure cover by a plurality of detection bolts, which are arranged in an array.

10. A belt conveyor, characterized in that, The device includes a conveyor belt, a frame, and an off-center load detection device as described in any one of claims 1 to 9. The conveyor belt extends longitudinally, the frame includes two longitudinal beams spaced laterally, forming a conveying space between the two longitudinal beams, two idler roller mechanisms are respectively supported on both sides of the conveyor belt laterally and can roll in cooperation with the conveyor belt, and the weighing frame is supported on the two longitudinal beams and suspends the two idler roller mechanisms in the conveying space.

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