Belt tearing detection device

Abstract

The utility model relates to a belt tearing detection device. Comprising a bottom frame, a light shield with a groove in the top is installed on the bottom frame, a sweeping brush acting on a return belt is installed on the top of the light shield, and a plurality of detection devices are installed on the bottom frame and in the light shield. The detection device comprises a detection assembly supported by a lifting type supporting assembly, the detection assembly comprises a shell, a laser generator and a shooting camera, the laser generator and the shooting camera are installed in the shell, the laser generator emits laser beams upwards and forms a linear laser light band on the belt, and the shooting camera obtains images of the return belt and the light band. A transparent cover plate is further installed on the top of the shell. The cleaning assembly and the blowing assembly are used for cleaning the transparent cover plate. The utility model provides a belt tearing detection device which can timely and effectively detect the belt tearing condition, improve the detection accuracy, improve the operation safety in the industrial production process and ensure the operation efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of belt conveyor state detection, and particularly relates to a belt tearing detection device. Background Art

[0002] Belt conveyors are currently widely used in various links of modern industrial production, such as packaging, transportation, etc. During the operation of a belt conveyor, due to factors such as aging and abnormal working conditions, the belt of the belt conveyor may have a tearing problem. Specifically, belt tearing can be attributed to the following reasons: 1) Scratching by foreign objects; 2) Belt deviation; 3) Material jamming; 4) Improper installation of auxiliary equipment; 5) Tearing caused by blocked materials; 6) Tearing caused by the dropping of intermediate idlers; 7) Tearing at the head; 8) Tearing caused by faults of conveyor components. No matter what causes the belt to tear, it will eventually lead to material leakage, equipment damage, and even more serious safety accidents.

[0003] In summary, it is crucial for the safe operation of the belt conveyor system to detect the state of the belt of the belt conveyor in a timely manner to discover the belt tearing problem and perform timely shutdown processing. In the prior art, belt tearing detection methods rely on manual inspections or contact sensors. The manual inspection method mainly relies on active observation, while contact sensors usually detect changes in the tension of the belt conveyor. The aforementioned detection means have problems such as untimely detection and low accuracy. Therefore, it is necessary to develop and design a new type of belt tearing detection means to solve the aforementioned technical problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a belt tearing detection device, which can detect the belt tearing situation in a timely and effective manner, improve the detection accuracy, enhance the operation safety of the industrial production process, and ensure the operation efficiency.

[0005] The technical solution adopted by the utility model is: a belt tearing detection device, which includes a bottom frame, on which a light-shielding cover with a groove on the top is installed. A cleaning brush acting on the return belt is installed on the top of the light-shielding cover. Inside the light-shielding cover on the bottom frame, a plurality of detection devices are installed; the detection device includes a detection component supported by a lifting support component. The detection component includes a housing and a laser generator and a camera installed inside the housing. The laser generator emits a laser beam upward and forms a "one"-shaped laser light band on the belt. The camera acquires the images of the return belt and the light band. A transparent cover plate is also installed on the top of the housing; it also includes a cleaning component and a blowing component for cleaning the transparent cover plate.

[0006] Preferably, the lifting support assembly includes a support column with guiding strip-shaped holes on its side wall. An adjusting screw is installed on the support column. An elevating base is provided inside the support column. A threaded hole is provided in the middle of the elevating base, and the adjusting screw is located in the threaded hole. A guiding screw is also installed on the side of the elevating base and the guiding screw is located in the guiding strip-shaped hole. The housing is fixedly connected to the elevating base.

[0007] Preferably, the cleaning assembly includes a cleaning support installed on the side of the housing. A cleaning cylinder is installed on the cleaning support. An elastic frame is installed at the front end of the piston rod of the cleaning cylinder. A cleaning scraper is installed on the elastic frame, and the bottom edge of the cleaning scraper contacts the surface of the transparent cover plate.

[0008] Preferably, the blowing assembly includes a flow equalizing base fixedly installed on the side of the housing. An air duct is provided inside the flow equalizing base, and an air source interface is provided at the outer end of the air duct. A flow equalizing plate with a plurality of air blowing holes is installed on the inner side of the flow equalizing base, and the blowing direction of the air blowing holes faces the transparent cover plate.

[0009] Preferably, the light shield includes an end light shield with a groove at the top and a side light shield without a groove at the top. The edge of the side light shield is detachably connected to the edge of the end light shield, and a handle is installed on the side light shield.

[0010] Preferably, the cleaning brush includes a lower brush installed on the inner edge of the groove of the end light shield and a side brush installed on the inner side of the top edge of the side light shield.

[0011] Preferably, the bottom frame includes two opposite bottom longitudinal beams and a plurality of bottom cross beams installed between the two bottom longitudinal beams. Each group of lifting support assemblies and detection assemblies are installed on the bottom cross beams.

[0012] Preferably, it further includes a speed measurement assembly. The speed measurement assembly includes a support arm fixedly installed on the inner side of the bottom longitudinal beam. An encoder and an encoder wheel are installed at the end of the support arm, and the rim of the encoder wheel contacts the belt.

[0013] Preferably, it further includes a supplementary light. The supplementary light includes a strip-shaped lamp holder and a plurality of lamp beads installed on the lamp holder. The lamp holder is fixedly installed on the bottom cross beam.

[0014] The advantages and positive effects of the present utility model are:

[0015] The present utility model provides a belt tear detection device. A detection component installed below the belt projects a laser beam upward to form a "one"-shaped light band on the belt, and a camera is used to obtain images of the return belt and the light band. Whether the belt has a tear problem is judged based on whether the laser light band in the image remains in a "one" shape. Compared with the existing belt tear detection means, the tear detection means in the present utility model does not require on-site inspection by personnel and realizes non-contact tear detection of the belt. Therefore, it can detect the belt tear situation in a timely and effective manner, improve the accuracy of detection, enhance the operation safety of the industrial production process, and ensure the operation efficiency.

[0016] By setting a light-shielding cover, the adverse influence on the imaging of the camera caused by the entry of external light into the interior is reduced or avoided, ensuring the accuracy of imaging and detection. By setting a cleaning brush, the materials adhered to the surface of the belt are continuously cleaned and removed, avoiding the adverse influence of surface attachments on the laser light band and the captured image. By configuring a cleaning component and a blowing component for the detection component, the controllable cleaning of the transparent cover plate of the detection component is realized, which is beneficial to projecting the laser light band and obtaining images, and further improves the accuracy and reliability of tear detection. Brief Description of the Drawings

[0017] Figure 1 is a schematic external structure diagram of the present utility model, upper perspective;

[0018] Figure 2 is a schematic internal structure diagram of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the lifting support component, detection component, cleaning component and blowing component in the present utility model.

[0020] In the figure:

[0021] 1, bottom longitudinal beam; 2, end light-shielding plate; 3, handle; 4, side light-shielding plate; 5, supplementary light; 6, lifting support component; 6-1, support column; 6-2, guiding screw; 6-3, guiding strip hole; 6-4, adjusting screw; 6-5, lifting base; 7, lower brush; 8, side brush; 9, detection component; 9-1, housing; 9-2, transparent cover plate; 10, bottom cross beam; 11, speed measurement component; 12, cleaning component; 12-1, cleaning cylinder; 12-2, cleaning scraper; 12-3, elastic frame; 12-4, cleaning support; 13, blowing component; 13-1, uniform flow base; 13-2, uniform flow plate. Detailed Description of the Embodiment

[0022] To further understand the inventive content, features and effects of the present utility model, the following embodiments are given for detailed description.

[0023] Please refer to Figure 1 and Figure 2 , the belt tearing detection device of the present utility model includes a bottom frame, on which a light-shielding cover with a groove on the top is installed. A cleaning brush acting on the return belt is installed on the top of the light-shielding cover. A plurality of detection devices 9 are installed inside the light-shielding cover on the bottom frame.

[0024] This belt tearing detection device is installed on the equipment frame below the belt, and the return belt below falls into the groove on the top of the light-shielding cover. Its tearing detection principle is: the detection component 9 projects a laser beam upward onto the return belt and forms a "one"-shaped laser light band on the surface of the return belt. The detection component 9 takes an image of the return belt on which the laser light band is projected. Whether the belt has a tearing problem is judged according to whether the laser light band remains in the "one" shape. The function of setting the light-shielding cover is to reduce or avoid the adverse impact of external environmental light on the imaging during shooting. The function of setting the cleaning brush is to continuously clean and remove the materials adhered to the surface of the return belt, so as to avoid the adverse impact on the laser light band and the imaging during shooting.

[0025] In this embodiment, the bottom frame includes two opposite bottom longitudinal beams 1 and a plurality of bottom cross beams 10 installed between the two bottom longitudinal beams 1. Each detection device is installed on the bottom cross beam 10. As shown in the figure, the length direction of the bottom longitudinal beam 1 is parallel to the running direction of the belt, and the length direction of the bottom cross beam 10 is perpendicular to the running direction of the belt. Both the bottom longitudinal beam 1 and the bottom cross beam 10 are made of C-shaped steel. The end of the bottom cross beam 10 is welded with an end plate and the end plate is fixed to the bottom longitudinal beam 1 by bolts. The bottom longitudinal beam 1 is fixed to the equipment frame of the belt conveyor by bolts.

[0026] In this embodiment, a speed measurement component 11 is further included. The speed measurement component 11 includes a support arm installed and fixed on the inner side of the bottom longitudinal beam 1. An encoder and an encoder wheel are installed at the end of the support arm. The rim of the encoder wheel contacts the belt. In this way, through the frictional effect, as the belt moves, the encoder wheel rotates synchronously and the rotational linear velocity is equal to the moving speed of the belt. The encoder measures the moving speed of the return belt.

[0027] In this embodiment, a supplementary light 5 is further included. The supplementary light 5 includes a strip-shaped lamp holder and a plurality of lamp beads installed on the lamp holder. The lamp holder is installed and fixed on the bottom cross beam 10. The function of setting the supplementary light 5 is to moderately supplement light to the inside of the light-shielding cover, which is beneficial to improving the clarity of the image captured by the detection component 9 and improving the detection accuracy.

[0028] In this embodiment, the light shield includes two front and rear end light shielding plates 2 with grooves at the top and two left and right side light shielding plates 4 without grooves at the top. The edge of the side light shielding plate 4 is detachably connected to the edge of the end light shielding plate 2, and a handle 3 is installed on the side light shielding plate 4. When necessary, the side light shielding plate 4 can be disconnected from the end light shielding plate 2 and the side light shielding plate 4 can be displaced through the handle 3 to expose the internal components for cleaning, maintenance and other operations.

[0029] In this embodiment, the cleaning brush includes a lower brush 7 installed on the inner edge of the groove of the end light shielding plate 2 and a side brush 8 installed on the inner side of the top edge of the side light shielding plate 4. The lower brush 7 is located below the return belt, and the side brush 8 is located on the side of the return belt. During the continuous operation of the belt, the lower brush 7 and the side brush 8 continuously act on the lower surface of the return belt to clean and remove the attachments on the belt. The clean belt surface is more conducive to emitting the laser beam and taking pictures, ensuring the accuracy of the laser light band and the image.

[0030] Please refer to Figure 2 and Figure 3 , it can be seen that:

[0031] The detection device includes a detection component 9 supported by a lifting support component 6. The detection component 9 includes a housing 9-1 and a laser generator and a camera installed inside the housing 9-1. The laser generator emits a laser beam upward and forms a "one"-shaped laser light band on the return belt. The camera acquires images of the return belt and the light band. A transparent cover plate 9-2 is also installed on the top of the housing 9-1.

[0032] The housing 9-1 and the transparent cover plate 9-2 enclose the laser generator and the camera inside, which can provide protection for the laser generator and the camera. The transparent cover plate 9-2 is selected as a tempered glass plate, which ensures the structural strength and does not affect the emission of the laser beam and the taking of images. A cable interface is provided at the bottom of the housing 9-1 for connecting the power supply cable and the signal cable.

[0033] Please refer to Figure 3, it can be seen that: the lifting support assembly 6 includes a support column 6-1 with a guiding strip hole 6-3 on its side wall, an adjusting screw 6-4 is installed on the support column 6-1, a lifting base 6-5 is arranged inside the support column 6-1, a threaded hole is provided in the middle of the lifting base 6-5 and the adjusting screw 6-4 is located in this threaded hole, a guiding screw 6-2 is also installed on the side of the lifting base 6-5 and the guiding screw 6-2 is located in the guiding strip hole 6-3, and the housing 9-1 is fixedly connected to the lifting base 6-5. The upper end of the adjusting screw 6-4 is provided with a rotating end, and tools such as a wrench can be used to drive the adjusting screw 6-4 to rotate by rotating the rotating end. Correspondingly, the lifting base 6-5 drives the detection assembly 9 to move up or down. Through the cooperation of the guiding screw 6-2 and the guiding strip hole 6-3, the lifting base 6-5 can only move up and down without swinging left and right.

[0034] Considering that the materials falling from above will land on the transparent cover plate 9-2, which has an adverse impact on emitting the laser beam and taking pictures, thus this belt tearing detection device further includes a cleaning assembly 12 and a blowing assembly 13 for cleaning the transparent cover plate 9-2. Among them, the cleaning assembly 12 provides a scraping and cleaning effect on the transparent cover plate 9-2, and the blowing assembly 13 provides a compressed air purging effect on the transparent cover plate 9-2. Their purposes are all to remove the dust on the surface of the transparent cover plate 9-2 and make the transparent cover plate 9-2 clean.

[0035] In this embodiment, the cleaning assembly 12 includes a cleaning support 12-4 installed on the side of the housing 9-1. A cleaning cylinder 12-1 is installed on the cleaning support 12-4. An elastic frame 12-3 is installed at the front end of the piston rod of the cleaning cylinder 12-1. A cleaning scraper 12-2 is installed on the elastic frame 12-3 and the bottom edge of the cleaning scraper 12-2 is in contact with the surface of the transparent cover plate 9-2. The cleaning cylinder 12-1 pushes and pulls the cleaning scraper 12-2, and the cleaning scraper 12-2 produces a scraping effect on the surface of the transparent cover plate 9-2.

[0036] The elastic frame 12-3 is selected as an elastic metal plate. The cleaning scraper 12-2 is a strip-shaped rubber plate and is installed and fixed on the front part of the elastic frame 12-3 by metal pressing plates and bolts. The elastic frame 12-3 made of elastic metal plate can deform by itself to avoid the problem of jamming of the cleaning scraper 12-2. After the cleaning scraper 12-2 is worn, it can be disassembled and replaced with a new one.

[0037] In this embodiment, the blowing assembly 13 includes a flow equalizing base 13-1 fixedly installed on the side of the housing 9-1. An air passage is provided inside the flow equalizing base 13-1, and an air source interface is provided at the outer end of the air passage. A flow equalizing plate 13-2 with a plurality of blow holes is installed on the inner side of the flow equalizing base 13-1, and the blowing direction of the blow holes faces the transparent cover plate 9-2. The compressed air pipeline is connected to the air source interface on the flow equalizing base 13-1, and the on-off of the compressed air is controlled by a solenoid valve. When the air circuit is connected, the compressed air is ejected toward the transparent cover plate 9-2 through the air passage and the blow holes of the flow equalizing plate 13-2 to blow the dust.

[0038] As Figure 2 As shown in the figure, there are two front and rear bottom crossbeams 10, and three left, middle, and right detection devices are installed on each bottom crossbeam 10. Among them, for each detection device located on the front bottom crossbeam 10, the cleaning scraper 12-2 of the cleaning assembly 12 moves back and forth, and the blowing assembly 13 blows compressed air forward. For each detection device located on the rear bottom crossbeam 10, the cleaning scraper 12-2 of the cleaning assembly 12 moves left and right, and the blowing assembly 13 blows compressed air backward.

[0039] Operating mode:

[0040] Install this belt tearing detection device on the equipment rack of the belt conveyor. The return belt falls into the top groove of the light shielding cover of this detection device, so that the lower brush 7 and the side brush 8 are in good contact with the return belt, and the encoder wheel of the speed measurement assembly 11 is in good contact with the return belt. Connect the power supply cable and signal cable of the detection assembly 9, connect the signal cable of the speed measurement assembly 11 and the power supply cable of the supplementary light 5, operate the lifting support assembly 6 to adjust the height of the detection assembly 9 to a suitable position, and install the light shielding cover;

[0041] The power supply cable and signal cable of the detection assembly 9, the signal cable of the speed measurement assembly 11, and the power supply cable of the supplementary light 5 are connected to the upper computer with a display screen. During operation, the laser generator of the detection assembly 9 projects a laser beam on the surface of the return belt to form a "one"-shaped laser light band. The camera takes pictures of the return belt and the laser light band at regular intervals, and the pictures are displayed on the display screen of the upper computer. By observing whether the laser light band in the picture remains "one"-shaped, it is judged whether the belt has a tearing problem. When the belt has a tearing problem, the laser light band in the picture will no longer be a uniform and straight light band. When it is judged that there is a belt tearing problem, the belt conveyor should be stopped in time;

[0042] It can be imagined that detection software can also be installed on the upper computer. The detection software processes the acquired images, judges whether there is a belt tearing problem by judging whether the laser light band in the images is deformed, and controls the belt conveyor to stop and send an alarm message when a tearing problem is detected.

Claims

1. A belt tearing detection device, characterized in that: It includes a bottom frame, on which a light-shielding cover with a groove at the top is installed. A cleaning brush acting on the return belt is installed on the top of the light-shielding cover. Inside the light-shielding cover and on the bottom frame, a plurality of detection devices are installed; the detection device includes a detection component (9) supported by a lifting support component (6). The detection component (9) includes a housing (9-1) and a laser generator and a camera installed inside the housing (9-1). The laser generator projects a laser beam upward and forms a "one"-shaped laser light band on the belt. The camera acquires images of the upper return belt and the laser light band. A transparent cover plate (9-2) is also installed on the top of the housing (9-1); it also includes a cleaning component (12) and a blowing component (13) for cleaning the transparent cover plate (9-2).

2. The belt tearing detection device according to claim 1, characterized in that: The lifting support component (6) includes a support column (6-1) with a guiding strip hole (6-3) on the side wall. An adjusting screw (6-4) is installed on the support column (6-1). Inside the support column (6-1), a lifting base (6-5) is provided. A threaded hole is provided in the middle of the lifting base (6-5) and the adjusting screw (6-4) is located in the threaded hole. A guiding screw (6-2) is also installed on the side of the lifting base (6-5) and the guiding screw (6-2) is located in the guiding strip hole (6-3). The housing (9-1) is fixedly connected to the lifting base (6-5).

3. The belt tearing detection device according to claim 2, characterized in that: The cleaning component (12) includes a cleaning support (12-4) installed on the side of the housing (9-1). A cleaning cylinder (12-1) is installed on the cleaning support (12-4). An elastic frame (12-3) is installed at the front end of the piston rod of the cleaning cylinder (12-1). A cleaning scraper (12-2) is installed on the elastic frame (12-3) and the bottom edge of the cleaning scraper (12-2) contacts the surface of the transparent cover plate (9-2).

4. The belt tearing detection device according to claim 3, characterized in that: The blowing component (13) includes a uniform flow base (13-1) fixedly installed on the side of the housing (9-1). An air passage is provided inside the uniform flow base (13-1) and an air source interface is provided at the outer end of the air passage. A uniform flow plate (13-2) with a plurality of air injection holes is installed inside the uniform flow base (13-1). The blowing direction of the air injection holes faces the transparent cover plate (9-2).

5. The belt tearing detection device according to claim 4, characterized in that: The light-shielding cover includes an end light-shielding plate (2) with a groove at the top and a side light-shielding plate (4) without a groove at the top. The edge of the side light-shielding plate (4) is detachably connected to the edge of the end light-shielding plate (2) and a handle (3) is installed on the side light-shielding plate (4).

6. The belt tearing detection device according to claim 5, characterized in that: The cleaning brush includes a lower brush (7) installed on the inner edge of the groove of the end light-shielding plate (2) and a side brush (8) installed inside the top edge of the side light-shielding plate (4).

7. The belt tearing detection device according to claim 6, characterized in that: The bottom frame includes two opposite bottom longitudinal beams (1) and a plurality of bottom cross beams (10) installed between the two bottom longitudinal beams (1). Each group of lifting support components (6) and detection components (9) are installed on the bottom cross beam (10).

8. The belt tearing detection device according to any one of claims 1 to 7, characterized in that: It further includes a speed measurement component (11), and the speed measurement component (11) includes a support arm fixedly installed inside the bottom longitudinal beam (1). An encoder and an encoder wheel are installed at the end of the support arm, and the rim of the encoder wheel contacts the belt.

9. The belt tearing detection device according to any one of claims 1 to 7, characterized in that: It further includes a supplementary light, and the supplementary light includes a strip-shaped lamp holder and a plurality of lamp beads installed on the lamp holder. The lamp holder is fixedly installed on the bottom cross beam (10).

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