Coal mine belt surface crack detection device and method

Abstract

The invention discloses a coal mine belt surface crack detection device and method, and belongs to the technical field of coal mine belt detection.The coal mine belt surface crack detection device comprises a base and a camera and further comprises a fixed seat and a movable seat which are arranged in an inner cavity of the base, the fixed seat and the movable seat are both rotationally connected with rotating rollers, and the rotating rollers are located outside the base; and a first motor is arranged in the fixed seat. During detection, whether the crack area exists in the area between the ultrasonic transmitter and the ultrasonic receiver or not is judged through the ultrasonic transmitter and the ultrasonic receiver, if yes, the camera shoots a picture and extracts related characteristics for analysis, and the cleaning module is used for cleaning the to-be-detected area of the belt before shooting, so that the possibility of misjudgment can be reduced, and the detection accuracy is improved. Therefore, compared with the prior art, the method that the detection is carried out after the cleaning work is carried out in the crack area has the advantage that the efficiency is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine belt detection, and in particular to a device and method for detecting surface cracks in a coal mine belt. Background Art

[0002] A Chinese patent with authorization announcement number CN117571728A discloses a coal mine belt surface crack detection device based on machine learning. It uses machine learning to detect the belt tearing condition, clamps the belt with two clamps, and stretches the belt inspection area to open the belt crack gap for easy camera collection.

[0003] However, the disadvantage of using a single visual inspection technology is that it is necessary to take photos of each area on the belt one by one, and it is not possible to first screen out the torn areas on the belt and then take photos of the torn areas.

[0004] Authorization announcement number CN118090924A discloses a method for detecting longitudinal tears in a conveyor belt. An ultrasonic detector is used to detect whether there is a tear in a certain area of ​​the belt, and the specific coordinates of the tear area can be determined based on the received signal. However, this method is difficult to intuitively display the specific characteristics of the torn area of ​​the belt (length, width, depth, etc.).

[0005] By combining the technical solutions provided by the above two patents, an ultrasonic detector can be used to determine whether there is a tearing area in a certain area, and then photographed by a camera. This can not only improve the detection efficiency, but also analyze the specific characteristics of the tearing area.

[0006] However, there is often dirt on the belts used in coal mines. The combination of ultrasonic detection and cameras still cannot solve the problem that there is a certain possibility of misjudgment when there is dirt on the belts using visual detection methods using cameras. Therefore, the belts still need to be cleaned before detection, and the operating efficiency is low.

[0007] Therefore, we propose a coal mine belt surface crack detection device and method to solve the above problems.

[0008] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0009] The purpose of the present invention is to provide a coal mine belt surface crack detection device and method to solve the problem raised by the above background technology that the current prior art still needs to clean the belt before detection, resulting in reduced efficiency.

[0010] To achieve the above-mentioned object, the present invention provides a coal mine belt surface crack detection device, comprising a base and a camera, and also comprising a fixed seat and a movable seat arranged in the inner cavity of the base, wherein the fixed seat and the movable seat are both rotatably connected with a rotating roller, and the rotating roller is located outside the base;

[0011] The fixing seat is provided with a first motor, and the output shaft is drivingly connected to one of the rotating rollers;

[0012] A hydraulic rod is also horizontally arranged in the inner cavity of the base, and the output end is fixed to the movable seat;

[0013] The base is also fixedly mounted with a concave-shaped horizontal plate, and the horizontal plate is located between the two rotating rollers, and the end of the horizontal plate passes through the outside of the base;

[0014] A cleaning box is slidably connected in the notch of the transverse plate, and a cleaning module is arranged in the cleaning box;

[0015] A first electric telescopic rod is also horizontally fixedly installed in the inner cavity of the base, and the direction is the same as the installation direction of the horizontal plate, and the output end is fixed to the cleaning box;

[0016] Clamps are movably installed on both sides of the notch of the horizontal plate;

[0017] A stretching assembly is also provided in the inner cavity of the base and is transmission-connected to the clamp;

[0018] The two sets of clamps are also respectively provided with an ultrasonic transmitter and an ultrasonic receiver attached to the surface of the belt;

[0019] A mounting seat is fixedly mounted on the base, and the camera is arranged on the mounting seat.

[0020] Preferably, the cleaning module comprises a second motor, a cleaning roller, a gear and a toothed chain;

[0021] The second motor is fixedly installed in the cleaning box, and the cleaning roller is rotatably connected to the bottom end of the cleaning box and arranged horizontally;

[0022] The gear is fixedly mounted on the cleaning roller and is connected via a toothed chain transmission;

[0023] The output shaft of the second motor is drivingly connected to one of the cleaning rollers.

[0024] Preferably, the clamp comprises two boxes, a limit rod and a cylinder;

[0025] The limiting rod is horizontally installed in the notch of the transverse plate;

[0026] The two boxes are both slidably connected to the limit rod;

[0027] A vertical rod is fixedly installed in the box body, an upper clamping plate is fixedly installed on the vertical rod, and a lower clamping plate located below the upper clamping plate is movably installed on the vertical rod, and both the upper clamping plate and the lower clamping plate are horizontally extended to the outside of the box body;

[0028] The cylinder is vertically fixedly installed at the bottom of the box, and the output end penetrates into the box and is fixed to the lower clamping plate;

[0029] The ultrasonic transmitter and the ultrasonic receiver are respectively arranged on the two lower clamping plates.

[0030] Preferably, the stretching assembly comprises a second electric telescopic rod, which is vertically fixedly installed in the inner cavity of the base, and the output end is rotatably connected to two rotating rods;

[0031] The ends of the two rotating rods are rotatably connected to the two boxes respectively.

[0032] Preferably, the clamp further comprises two movable columns and two springs;

[0033] The two movable columns are respectively and vertically movably mounted on the two lower clamping plates;

[0034] The ultrasonic transmitter and the ultrasonic receiver are fixedly mounted on the top ends of the two movable columns respectively;

[0035] The two springs are respectively sleeved on the two movable columns, and the two ends of the springs are respectively fixed to the lower clamping plate and the movable column.

[0036] Preferably, it also includes a cross bar, which is horizontally fixedly installed in the inner cavity of the base, and the cross bar is passed through the movable seat.

[0037] Preferably, a pulley is also provided on the bottom surface of the movable seat and is in contact with the base.

[0038] Preferably, it further comprises a linear transmission assembly, wherein the linear transmission assembly comprises a third motor, a lead screw, a guide rod and a movable block;

[0039] The third motor is fixedly mounted on the mounting seat;

[0040] The lead screw is vertically rotatably connected in the inner cavity of the mounting seat;

[0041] The guide rod is vertically fixedly installed in the mounting seat;

[0042] The movable block is threadedly sleeved on the lead screw, and the movable block is movably mounted on the guide rod;

[0043] The mounting seat is also provided with a slide groove, through which the movable block passes to the outside of the mounting seat, and a mounting plate is fixedly installed;

[0044] The camera is fixedly mounted on the mounting plate;

[0045] The camera is located between the two boxes.

[0046] A method for detecting cracks on the surface of a coal mine belt is applied to a device for detecting cracks on the surface of a coal mine belt. The detection method includes:

[0047] The belt to be inspected is mounted on the two rotating rollers, and the movable seat is pushed by the hydraulic rod to tension the belt to be inspected;

[0048] The belt to be inspected is clamped by the clamp, and the ultrasonic transmitter and the ultrasonic receiver are in contact with the belt to be inspected;

[0049] The ultrasonic transmitter transmits ultrasonic waves, and the ultrasonic receiver receives the ultrasonic waves. It is determined through the received signal whether there is a torn area in the area between the ultrasonic transmitter and the ultrasonic receiver of the belt to be inspected. If there is, the specific coordinates of the torn area are obtained;

[0050] The rotating roller is driven to rotate by the first motor so that the tearing area reaches directly below the camera;

[0051] The cleaning box and the cleaning module are driven by the first electric telescopic rod to clean the belt to be inspected;

[0052] Driving the cleaning box and the cleaning module back into the base by the first electric telescopic rod;

[0053] Taking pictures of the torn area of ​​the belt to be inspected by the camera and analyzing the pictures;

[0054] The rotating roller is driven to rotate by the first motor to detect the next position of the belt to be inspected.

[0055] Preferably, the steps further include:

[0056] Taking a picture of the belt to be inspected by a camera, and judging the degree of tearing in the area based on visual inspection technology analysis;

[0057] The belt to be inspected is clamped by the clamp and stretched by the stretching assembly to determine whether the belt to be inspected is broken.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] (1) The present invention realizes the detection of cracks on the surface of the belt by combining a camera, an ultrasonic transmitter and an ultrasonic receiver. During the detection, the ultrasonic transmitter and the ultrasonic receiver are first used to determine whether there is a crack area between the two. If there is a crack area, the camera is used to take a photo and relevant features are extracted for analysis. Before taking the photo, the cleaning module is used to clean the belt area to be inspected, thereby reducing the possibility of misjudgment. Therefore, the method of only cleaning the crack area and then performing the detection significantly improves the efficiency compared with the prior art.

[0060] (2) The present invention achieves belt tensioning by driving the movable seat through a hydraulic rod. While replacing the tensioning roller existing in the prior art, the movable seat is adjustable in position and the distance between the two rotating rollers is adjustable, thereby being suitable for coal mine belts of different lengths.

[0061] (3) Compared with the prior art, the present invention greatly improves the convenience of installing the coal mine belt by installing two rotating rollers on the outside of the base.

[0062] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0064] Figure 2 for Figure 1 Front view of

[0065] Figure 3 It is a schematic diagram of the internal structure of the fixing base of the present invention;

[0066] Figure 4 for Figure 1 Schematic diagram of the structure after the base is hidden;

[0067] Figure 5 for Figure 4 Schematic diagram of the structure after hiding the fixed seat and movable seat;

[0068] Figure 6 It is a structural schematic diagram of the clamp of the present invention;

[0069] Figure 7 It is a structural schematic diagram of the cleaning module of the present invention;

[0070] Figure 8 Figure 5 A magnified view of the structure at center.

[0071] In the figure: 1, base; 2, camera; 3, fixed seat; 4, movable seat; 5, rotating roller; 6, first motor; 7, hydraulic rod; 8, cross plate; 9, cleaning box; 10, cleaning module; 11, first electric telescopic rod; 12, clamp; 13, stretching assembly; 14, ultrasonic transmitter; 15, ultrasonic receiver; 16, linear transmission assembly; 17, mounting seat; 18, cross bar;

[0072] 1001, second motor; 1002, cleaning roller; 1003, gear; 1004, toothed chain;

[0073] 1201, box body; 1202, limit rod; 1203, upper clamping plate; 1204, lower clamping plate; 1205, cylinder; 1206, vertical rod; 1207, movable column; 1208, spring;

[0074] 1301, second electric telescopic rod; 1302, rotating rod;

[0075] 1601, the third motor; 1602, the lead screw; 1603, the guide rod; 1604, the movable block; 1605, the mounting plate. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative sizes and proportions of the parts shown in the figures are exaggerated or reduced in size, and any size is only exemplary and not restrictive.

[0077] Embodiment 1:

[0078] See also Figure 1-Figure 3A coal mine belt surface crack detection device comprises: a base 1 and a camera 2, and also comprises a fixed seat 3 and a movable seat 4 arranged in the inner cavity of the base 1, wherein the fixed seat 3 and the movable seat 4 are both rotatably connected with a rotating roller 5, and the rotating roller 5 is located outside the base 1; a first motor 6 is arranged in the fixed seat 3, and the output shaft is transmission-connected with one of the rotating rollers 5; a hydraulic rod 7 is also horizontally arranged in the inner cavity of the base 1, and the output end is fixed to the movable seat 4; a concave-shaped horizontal plate 8 is also fixedly installed on the base 1, and the horizontal plate 8 is located between the two rotating rollers 5, and the end thereof passes through the outside of the base 1; the horizontal plate A cleaning box 9 is slidably connected in the recess of 8, and a cleaning module 10 is provided in the cleaning box 9; a first electric telescopic rod 11 is also horizontally fixedly installed in the inner cavity of the base 1, and the direction is the same as the installation direction of the cross plate 8, and the output end is fixed to the cleaning box 9; clamps 12 are movably installed on both sides of the recess of the cross plate 8; a stretching component 13 is also provided in the inner cavity of the base 1, and is transmission-connected with the clamp 12; the two sets of clamps 12 are also respectively provided with an ultrasonic transmitter 14 and an ultrasonic receiver 15 attached to the surface of the belt; a mounting seat 17 is fixedly installed on the base 1, and the camera 2 is arranged on the mounting seat 17.

[0079] By adopting the above technical scheme, when in use, the belt is installed by two rotating rollers 5, and the movable seat 4 is pushed by the hydraulic rod 7 to tighten the belt. The rotating roller 5 is driven by the first motor 6 to rotate and drive the belt to move. Before the belt moves, the signals of the ultrasonic transmitter 14 and the ultrasonic receiver 15 are used to determine whether there is a crack in the area between the ultrasonic transmitter 14 and the ultrasonic receiver 15, and the relevant position information is sent to the background. The first motor 6 is controlled by the background to work so that the torn area of ​​the belt is located directly below the camera 2, and is cleaned by the cleaning module 10. After cleaning, a photo of the torn area is taken by the camera 2, and then the belt is clamped by the clamp 12, and the belt is stretched and photographed again. The torn area of ​​the belt is further analyzed. The cleaning module is used to clean the area to be inspected of the belt before shooting, thereby reducing the possibility of misjudgment. Therefore, the method of only cleaning the area with cracks and then conducting inspection significantly improves efficiency compared with the prior art.

[0080] See also Figure 1 , Figure 4 , Figure 5 as well as Figure 7 The cleaning module 10 includes a second motor 1001, a cleaning roller 1002, a gear 1003 and a toothed chain 1004; the second motor 1001 is fixedly installed in the cleaning box 9, and the cleaning roller 1002 is rotatably connected to the bottom end of the cleaning box 9 and is arranged horizontally; the gear 1003 is fixedly installed on the cleaning roller 1002 and is transmission connected through the toothed chain 1004; the output shaft of the second motor 1001 is transmission connected to one of the cleaning rollers 1002.

[0081] By adopting the above technical solution, when in use, the output shaft of the second motor 1001 rotates to drive the cleaning roller 1002 to rotate, generate friction with the belt surface, and clean the belt surface area.

[0082] See also Figure 4-Figure 6 The clamp 12 includes two boxes 1201, a limit rod 1202 and a cylinder 1205; the limit rod 1202 is horizontally installed in the recess of the horizontal plate 8; the two boxes 1201 are slidably connected to the limit rod 1202; a vertical rod 1206 is fixedly installed in the box 1201, and an upper clamping plate 1203 is fixedly installed on the vertical rod 1206. The vertical rod 1206 is also movably installed with a lower clamping plate 1204 located below the upper clamping plate 1203, and the upper clamping plate 1203 and the lower clamping plate 1204 are both horizontally extended to the outside of the box 1201; the cylinder 1205 is vertically fixedly installed at the bottom of the box 1201, and the output end penetrates into the box 1201 and is fixed to the lower clamping plate 1204; the ultrasonic transmitter 14 and the ultrasonic receiver 15 are respectively arranged on the two lower clamping plates 1204.

[0083] By adopting the above technical solution, the operation of the cylinder 1205 can make the lower clamping plate 1204 move toward the upper clamping plate 1203 to achieve clamping of the belt. The ultrasonic transmitter 14 and the ultrasonic receiver 15 are installed on the lower clamping plate 1204. When the lower clamping plate 1204 clamps the belt, the ultrasonic transmitter 14 and the ultrasonic receiver 15 can contact the belt. When not clamped, the ultrasonic transmitter 14 and the ultrasonic receiver 15 are out of contact, thereby avoiding friction between the belt and the ultrasonic transmitter 14 and the ultrasonic receiver 15 when the belt moves.

[0084] See also Figure 5-Figure 6 The stretching assembly 13 includes a second electric telescopic rod 1301, which is vertically fixedly installed in the inner cavity of the base 1, and the output end is rotatably connected to two rotating rods 1302; the ends of the two rotating rods 1302 are rotatably connected to the two boxes 1201 respectively.

[0085] By adopting the above technical solution, when the output end of the second electric telescopic rod 1301 is extended, the rotating rod 1302 can drive the box 1201 to move horizontally. After the upper clamping plate 1203 and the lower clamping plate 1204 clamp the belt, the upper clamping plate 1203 and the lower clamping plate 1204 are driven to move horizontally through the box 1201, thereby stretching the belt.

[0086] See also Figure 5 and Figure 8The clamp 12 also includes two movable columns 1207 and two springs 1208; the two movable columns 1207 are respectively vertically movably installed on the two lower clamps 1204; the ultrasonic transmitter 14 and the ultrasonic receiver 15 are respectively fixedly installed on the top of the two movable columns 1207; the two springs 1208 are respectively sleeved on the two movable columns 1207, and the two ends of the springs 1208 are respectively fixed to the lower clamps 1204 and the movable columns 1207.

[0087] Embodiment 2:

[0088] See also Figure 2 , which is different from Example 1 in that: it also includes a cross bar 18, which is horizontally fixed in the inner cavity of the base 1, and the cross bar 18 is passed through the movable seat 4. The bottom surface of the movable seat 4 is also provided with a pulley, and is in contact with the base 1.

[0089] By adopting the above technical solution, it is possible to avoid the output end of the hydraulic rod 7 being subjected to a large downward pressure from the movable seat 4, while facilitating the stable operation of the movable seat 4.

[0090] Embodiment 3:

[0091] See also Figure 1 and Figure 2 On the basis of Example 1, it also includes a linear transmission component 16, which includes a third motor 1601, a lead screw 1602, a guide rod 1603 and a movable block 1604; the third motor 1601 is fixedly mounted on the mounting seat 17; the lead screw 1602 is vertically rotatably connected in the inner cavity of the mounting seat 17; the guide rod 1603 is vertically fixedly mounted in the mounting seat 17; the movable block 1604 is threadedly sleeved on the lead screw 1602, and the movable block 1604 is movably mounted on the guide rod 1603; the mounting seat 17 is also provided with a slide groove, and the movable block 1604 passes through the slide groove to the outside of the mounting seat 17, and is fixedly mounted with a mounting plate 1605; the camera 2 is fixedly mounted on the mounting plate 1605; the camera 2 is located between the two boxes 1201.

[0092] By adopting the above technical solution, when the cleaning module 10 is cleaning, the linear transmission assembly 16 drives the camera 2 to rise to stay away from the belt to prevent dust raised during cleaning from contaminating the camera. At the same time, the camera 2 can be raised to facilitate the camera to shoot the crack area.

[0093] A method for detecting cracks on the surface of a coal mine belt is applied to a device for detecting cracks on the surface of a coal mine belt. The detection method includes:

[0094] S1. Install the belt to be inspected on two rotating rollers 5, and push the movable seat 4 through the hydraulic rod 7 to tighten the belt to be inspected;

[0095] S2, clamp the belt to be tested by the clamp 12, and the ultrasonic transmitter 14 and the ultrasonic receiver 15 contact the belt to be tested;

[0096] S3, the ultrasonic transmitter 14 transmits ultrasonic waves, and the ultrasonic receiver 15 receives the ultrasonic waves, and determines whether there is a torn area in the area between the ultrasonic transmitter 14 and the ultrasonic receiver 15 of the inspected belt through the received signal, and if so, obtains the specific coordinates of the torn area;

[0097] S4, driving the rotating roller 5 to rotate by the first motor 6, so that the tearing area reaches directly below the camera 2;

[0098] S5, driving the cleaning box 9 and the cleaning module 10 to clean the belt to be inspected by the first electric telescopic rod 11;

[0099] S6, driving the cleaning box 9 and the cleaning module 10 back to the inside of the base 1 by the first electric telescopic rod 11;

[0100] S7, taking a picture of the torn area of ​​the belt to be inspected by camera 2, and analyzing the picture;

[0101] S8. The first motor 6 drives the rotating roller 5 to rotate to detect the next position of the belt to be inspected.

[0102] Step S7 includes:

[0103] S71. Take a picture of the belt to be inspected by a camera, and determine the degree of tearing in the area based on visual inspection technology analysis;

[0104] S72, clamp the belt to be inspected by the clamp 12 and stretch it by the stretching assembly 13 to determine whether the belt to be inspected is broken.

[0105] Working principle: When in use, first install the belt onto the two rotating rollers 5, tighten the belt through the hydraulic rod 7, control the ultrasonic transmitter 14 to emit ultrasonic waves, and the ultrasonic receiver 15 receives the signal and transmits it to the background to analyze whether there are cracks in the area. If there are cracks, the cleaning box 9 is pushed out of the base 1 through the first electric telescopic rod 11 until the cleaning roller 1002 is in full contact with the belt, and then the second motor 1001 works to rotate the cleaning roller 1002 to clean the surface of the belt. After completion, the cleaning box 9 returns to the inside of the base 1, and the third motor 1601 works to drive the camera 2 to descend, take relevant photos of the crack area, and transmit them to the background for analysis.

[0106] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0107] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0108] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0109] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0111] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0112] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal mine belt surface crack detection device, comprising a base (1) and a camera (2), characterized in that: It also comprises a fixed seat (3) and a movable seat (4) arranged in the inner cavity of the base (1), wherein the fixed seat (3) and the movable seat (4) are both rotatably connected to a rotating roller (5), and the rotating roller (5) is located outside the base (1); The fixing seat (3) is provided with a first motor (6), and the output shaft is drivingly connected to one of the rotating rollers (5); A hydraulic rod (7) is also horizontally arranged in the inner cavity of the base (1), and the output end is fixed to the movable seat (4); The base (1) is also fixedly mounted with a concave-shaped transverse plate (8), and the transverse plate (8) is located between the two rotating rollers (5), and the end of the transverse plate extends out of the base (1); A cleaning box (9) is slidably connected in the recess of the transverse plate (8), and a cleaning module (10) is provided in the cleaning box (9); A first electric telescopic rod (11) is also horizontally fixedly installed in the inner cavity of the base (1) in the same direction as the installation direction of the horizontal plate (8), and the output end is fixed to the cleaning box (9); Clamps (12) are movably mounted on both sides of the notch of the transverse plate (8); A stretching assembly (13) is also provided in the inner cavity of the base (1) and is transmission-connected to the clamp (12); The two sets of clamps (12) are also respectively provided with an ultrasonic transmitter (14) and an ultrasonic receiver (15) attached to the surface of the belt; The base (1) is fixedly mounted with a mounting seat (17), and the camera (2) is arranged on the mounting seat (17).

2. A coal mine belt surface crack detection device according to claim 1, characterized in that: The cleaning module (10) comprises a second motor (1001), a cleaning roller (1002), a gear (1003) and a toothed chain (1004); The second motor (1001) is fixedly installed in the cleaning box (9), and the cleaning roller (1002) is rotatably connected to the bottom end of the cleaning box (9) and arranged horizontally; The gear (1003) is fixedly mounted on the cleaning roller (1002) and is transmission-connected via a toothed chain (1004); The output shaft of the second motor (1001) is drivingly connected to one of the cleaning rollers (1002).

3. A coal mine belt surface crack detection device according to claim 1, characterized in that: The clamp (12) comprises two boxes (1201), a limiting rod (1202) and a cylinder (1205); The limiting rod (1202) is horizontally installed in the notch of the transverse plate (8); The two boxes (1201) are both slidably connected to the limiting rod (1202); A vertical rod (1206) is fixedly installed in the box body (1201), an upper clamping plate (1203) is fixedly installed on the vertical rod (1206), and a lower clamping plate (1204) located below the upper clamping plate (1203) is movably installed on the vertical rod (1206), and both the upper clamping plate (1203) and the lower clamping plate (1204) are horizontally extended to the outside of the box body (1201); The cylinder (1205) is vertically fixedly installed at the bottom of the box (1201), and the output end penetrates into the box (1201) and is fixed to the lower clamping plate (1204); The ultrasonic transmitter (14) and the ultrasonic receiver (15) are respectively arranged on the two lower clamping plates (1204).

4. A coal mine belt surface crack detection device according to claim 3, characterized in that: The stretching assembly (13) comprises a second electric telescopic rod (1301), the second electric telescopic rod (1301) is vertically fixedly installed in the inner cavity of the base (1), and the output end is rotatably connected to two rotating rods (1302); The ends of the two rotating rods (1302) are rotatably connected to the two boxes (1201) respectively.

5. The coal mine belt surface crack detection device according to claim 3, characterized in that: The clamp (12) further comprises two movable columns (1207) and two springs (1208); The two movable columns (1207) are respectively and vertically movably mounted on the two lower clamping plates (1204); The ultrasonic transmitter (14) and the ultrasonic receiver (15) are respectively fixedly mounted on the top ends of the two movable columns (1207); The two springs (1208) are respectively sleeved on the two movable columns (1207), and the two ends of the springs (1208) are respectively fixed to the lower clamping plate (1204) and the movable column (1207).

6. A coal mine belt surface crack detection device according to claim 1, characterized in that: It also comprises a cross bar (18) which is horizontally fixedly installed in the inner cavity of the base (1), and the cross bar (18) is passed through the movable seat (4).

7. A coal mine belt surface crack detection device according to claim 1, characterized in that: The bottom surface of the movable seat (4) is also provided with a pulley, and is in contact with the base (1).

8. The coal mine belt surface crack detection device according to claim 3, characterized in that: It also includes a linear transmission assembly (16), wherein the linear transmission assembly (16) includes a third motor (1601), a lead screw (1602), a guide rod (1603) and a movable block (1604); The third motor (1601) is fixedly mounted on the mounting seat (17); The lead screw (1602) is vertically rotatably connected in the inner cavity of the mounting seat (17); The guide rod (1603) is vertically fixedly mounted in the mounting seat (17); The movable block (1604) is threadedly sleeved on the lead screw (1602), and the movable block (1604) is movably mounted on the guide rod (1603); The mounting seat (17) is also provided with a slide groove, and the movable block (1604) passes through the slide groove to the outside of the mounting seat (17), and is fixedly mounted with a mounting plate (1605); The camera (2) is fixedly mounted on the mounting plate (1605); The camera (2) is located between the two boxes (1201).

9. A method for detecting cracks on the surface of a coal mine belt, applied to a device for detecting cracks on the surface of a coal mine belt according to any one of claims 1 to 8, characterized in that: Detection methods include: S1. Install the belt to be inspected on the two rotating rollers (5), and push the movable seat (4) through the hydraulic rod (7) to tighten the belt to be inspected; S2, clamping the belt to be inspected by the clamp (12), so that the ultrasonic transmitter (14) and the ultrasonic receiver (15) are in contact with the belt to be inspected; S3, the ultrasonic transmitter (14) transmits ultrasonic waves, and the ultrasonic receiver (15) receives the ultrasonic waves, and determines whether the belt to be inspected has a torn area in the area between the ultrasonic transmitter (14) and the ultrasonic receiver (15) based on the received signal, and if so, obtains the specific coordinates of the torn area; S4, driving the rotating roller (5) to rotate by means of the first motor (6), so that the tearing area reaches directly below the camera (2); S5, driving the cleaning box (9) and the cleaning module (10) to clean the belt to be inspected by using the first electric telescopic rod (11); S6, driving the cleaning box (9) and the cleaning module (10) back to the inside of the base (1) via the first electric telescopic rod (11); S7, taking a picture of the torn area of ​​the belt to be inspected by the camera (2), and analyzing the picture; S8. Drive the rotating roller (5) to rotate by the first motor (6) to detect the next position of the belt to be inspected.

10. A method for detecting cracks on the surface of a coal mine belt according to claim 9, characterized in that: Step S7 includes: S71, taking a picture of the belt to be inspected by a camera, and determining the degree of tearing in the area based on visual inspection technology analysis; S72, clamping the belt to be inspected by the clamp (12) and stretching it by the stretching assembly (13), so as to determine whether the belt to be inspected is broken.

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