Ultrasonic crack detection device for mining conveyor belt

Abstract

The utility model relates to an ultrasonic crack detection device for a mining conveyor belt. The ultrasonic crack detection device comprises a supporting frame, a transmitting detection wheel assembly and a receiving detection wheel assembly, wherein the transmitting detection wheel assembly and the receiving detection wheel assembly are mounted on the supporting frame; the receiving detection wheel assemblies are arranged on the two sides of the transmitting detection wheel assembly at intervals in the length direction of the bearing frame. The transmitting detection wheel assembly is provided with a first roller used for making contact with a mining conveyor belt and an ultrasonic generator used for transmitting ultrasonic waves to the mining conveyor belt. The receiving detection wheel assembly is provided with a second roller used for making contact with a mining conveyor belt and an ultrasonic receiver used for receiving ultrasonic waves transmitted by the mining conveyor belt. According to the mining conveyor belt, small damage on the mining conveyor belt can be found in time, detection early warning can be sent out in time, so that the belt with safety risks can be repaired or replaced in time, economic losses caused by equipment faults can be greatly reduced, and the safety risks of personnel are effectively reduced.

Description

Technical Field

[0001] The utility model relates to a crack ultrasonic detection device, in particular to a crack ultrasonic detection device for a mine conveyor belt. Background Art

[0002] Conveyor belts are widely used in docks, mines and various production enterprises, and can realize the long-distance, large-remote and high-speed transportation of materials. The conveyor belt accounts for a high proportion of the total cost of the entire conveyor. Therefore, the economic loss caused by the belt tear is large, and the replacement and repair are time-consuming and laborious, seriously affecting production. At present, most conveyor belts are internally provided with built-in steel wires, and transverse tears rarely occur, mostly longitudinal tears. In high-risk industries such as mines where this longitudinal tear of the belt is a major concern, there are significant safety hazards.

[0003] Therefore, as the most critical transportation equipment in mines, its longitudinal tear detection and protection have been highly valued by major enterprises. During the use of the conveyor belt, rubber aging, wear, damage and even tearing and other damage conditions will continuously occur. When the through tear damage reaches a certain degree, it is very easy to cause serious accidents such as sudden breakage, winding and flipping of the conveyor belt. Once an accident occurs, it often has the risks of strong position randomness and high probability of injury. Therefore, how to detect the longitudinal tear of the conveyor belt in advance has become an urgent problem to be solved.

[0004] At present, there are also a small number of conveyor belt longitudinal tear detection devices on the market. For example, Chinese Patent Application CN220222437U discloses a belt longitudinal tear detection device, which includes a fixed rod, a nut is arranged on one side of the fixed rod, a rotating shaft is arranged on one side of the nut, an alarm is arranged below the nut, a groove is arranged on the other side of the fixed rod, an upper switch is arranged inside the groove, a touch block is arranged on one side of the upper switch, a support rod is arranged below the fixed block, a U-shaped block is arranged below the support rod, a connecting piece is arranged on one side of the U-shaped block, and a V-shaped piece is arranged on one side of the connecting piece. The utility model makes the device simple in structure and convenient for installation and disassembly by setting the fixed rod and the fixed clamp. By setting the U-shaped frame, it can detect the situation of irregular breakage of the belt and the insertion of sharp foreign objects. The V-shaped piece is set to detect whether there is a smooth notch that cannot be detected by the U-shaped frame on the belt. At the same time, the V-shaped piece also prevents the materials falling on the return conveyor belt from damaging the belt. In this scheme, it is necessary to detect foreign objects embedded in the belt to locate the tear position, but this method has great limitations. When there are no foreign objects or the notch is small, there are disadvantages that it cannot be detected, and this detection method can only be measured when the notch is large. Therefore, it does not have the disadvantage of being able to detect the longitudinal micro-tear of the conveyor belt in advance, and it is still difficult to issue a detection warning in time. Summary of the Utility Model

[0005] The utility model aims to provide a crack ultrasonic detection device for a conveyor belt used in a mine.

[0006] In order to achieve the above-mentioned utility model object, the utility model provides a crack ultrasonic detection device for a conveyor belt for mining, comprising: a support frame, a transmitting probe wheel assembly and a receiving probe wheel assembly installed on the support frame;

[0007] Along the length direction of the support frame, the receiving wheel assembly is spaced apart on both sides of the transmitting wheel assembly;

[0008] The transmitting and detecting wheel assembly is provided with a first roller for contacting with the mining conveyor belt and an ultrasonic generator for transmitting ultrasonic waves to the mining conveyor belt;

[0009] The receiving and detecting wheel assembly is provided with a second roller for contacting with the mining conveyor belt and an ultrasonic receiver for receiving ultrasonic waves conducted by the mining conveyor belt.

[0010] According to one aspect of the utility model, the first roller comprises: a first axle, a first roller part rotatably connected to the first axle;

[0011] The first roller portion has a hollow first accommodating cavity;

[0012] The ultrasonic generator is disposed in the first accommodating cavity and fixedly supported on the first wheel shaft.

[0013] The first accommodating cavity is filled with coupling agent.

[0014] According to one aspect of the utility model, the first roller part comprises: two first connecting flanges arranged symmetrically to each other and a first wheel body installed between the two first connecting flanges;

[0015] The first accommodating chamber is formed between the first connecting flange and the first wheel body.

[0016] According to one aspect of the utility model, the launch probe wheel assembly further includes: a first support structure;

[0017] The first supporting structure comprises: a first supporting seat, a first buffer assembly and a first connecting seat;

[0018] The first wheel axle is supported on the first supporting seat;

[0019] The first buffer assembly includes: a first guide rod, a first slider slidably connected to the first guide rod, and a first spring sleeved on the first guide rod;

[0020] The first spring is arranged at the lower side of the first sliding block, and is used to provide elastic support for the first sliding block in a vertical direction;

[0021] The first guide rod is supported on the first connecting seat;

[0022] The first sliding block is connected to the first supporting seat.

[0023] According to one aspect of the utility model, the receiving wheel detection assembly further includes: a speed sensor;

[0024] The speed sensor is in rolling contact with the second roller.

[0025] According to one aspect of the utility model, the second roller comprises: a second axle, a second roller portion rotatably connected to the second axle;

[0026] The second roller portion has a hollow second accommodating cavity;

[0027] The ultrasonic receiver is arranged in the second accommodating cavity and is fixedly supported on the second wheel axle;

[0028] The second accommodating cavity is filled with coupling agent.

[0029] According to one aspect of the utility model, the second roller part comprises: two second connecting flanges arranged symmetrically to each other and a second wheel body installed between the two second connecting flanges;

[0030] The second accommodating chamber is formed between the second connecting flange and the second wheel body.

[0031] According to one aspect of the utility model, the receiving wheel assembly further includes: a second supporting structure;

[0032] The second supporting structure comprises: a second supporting seat, a second buffer assembly, a rotating seat and a second connecting seat;

[0033] The second wheel axle is supported on the second supporting seat;

[0034] The second buffer assembly includes: a second guide rod, a second slider slidably connected to the second guide rod, and a second spring sleeved on the second guide rod;

[0035] The second spring is arranged at the lower side of the second slider, and is used to provide elastic support for the second slider in a vertical direction;

[0036] The second guide rod is supported on the rotating seat;

[0037] The second sliding block is connected to the second supporting seat;

[0038] The rotating seat and the second connecting seat are rotatably connected, wherein the second connecting seat is provided with an angle locking member for locking the rotating angle of the rotating seat.

[0039] According to one aspect of the utility model, it also includes: a spray assembly;

[0040] The spray assembly includes: a container for containing coupling agent, a liquid pump and a spray structure;

[0041] The spray structure comprises: a bamboo tube and a spray head detachably connected to the bamboo tube;

[0042] The spray structures are respectively arranged corresponding to the first roller and the second roller and are spaced apart from each other;

[0043] The spray head is used to spray coupling agent on the mining conveyor belt;

[0044] Along the transmission direction of the mining conveyor belt, the spraying position of the spray head is in front of the contact position between the first roller and the second roller and the mining conveyor belt.

[0045] According to one aspect of the utility model, the support frame is an overall truss structure, which includes: a middle support portion and side support portions respectively arranged at both ends of the middle support portion in the length direction;

[0046] The side support portion is arranged to be inclined relative to the middle support portion in an upward direction;

[0047] The launch probe wheel assembly is installed on one side of the middle support part;

[0048] The receiving and detecting wheel assembly is installed on one side of the side supporting part;

[0049] Along the transmission direction of the mining conveyor belt, the transmitting probe wheel assembly and the receiving probe wheel assembly are located on the same side of the supporting frame.

[0050] According to a scheme of the utility model, the mining conveyor belt of the utility model can promptly detect minor damage (such as longitudinal tear) on the mining conveyor belt, and can promptly issue a detection warning to facilitate the timely repair or replacement of the belt that poses a safety risk, which can greatly reduce the economic losses caused by equipment failure and effectively reduce the safety risks of personnel.

[0051] According to a scheme of the utility model, the first buffer assembly and the second buffer assembly can provide elastic supporting force to the corresponding rollers respectively, which can effectively realize stable support for each roller, and can fully press them against the mining conveyor belt to ensure reliable contact, which is beneficial to improving the detection accuracy of the utility model.

[0052] According to a solution of the utility model, by setting a spray assembly on the crack ultrasonic detection device, the coupling agent can be continuously sprayed on the mining conveyor belt, so that the ultrasonic signal transmission path is stable and reliable during the detection process of the utility model, and the detection capability of the utility model is further effectively guaranteed. In addition, by placing the spray position of the spray head in front of the contact position between the roller and the mining conveyor belt in the transmission direction of the mining conveyor belt, the coupling agent can be pre-sprayed, and the ultrasonic transmission path is pre-optimized, which further effectively guarantees the detection effect of the utility model.

[0053] According to a solution of the utility model, the receiving probe wheel assembly has an angle adjustment function, which can make the probe wheel better contact with the mining conveyor belt, effectively ensuring the detection reliability of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural diagram of a crack ultrasonic detection device according to an embodiment of the utility model;

[0055] Figure 2 It is a structural diagram of a launch probe wheel assembly according to an embodiment of the utility model;

[0056] Figure 3 is an internal structure diagram of a first roller according to an embodiment of the utility model;

[0057] Figure 4 It is a structural diagram of a receiving wheel probe assembly according to an embodiment of the utility model;

[0058] Figure 5 is an internal structure diagram of a second roller according to an embodiment of the utility model;

[0059] Figure 6 This is a diagram of the installation structure of the second roller and the speed sensor according to an embodiment of the utility model;

[0060] Figure 7 This is a diagram of the installation structure of the first roller according to an embodiment of the utility model;

[0061] Figure 8 is a stereoscopic diagram of a receiving wheel probe assembly according to an embodiment of the utility model;

[0062] Fig. 9 This is a structural diagram of a connection between a crack ultrasonic detection device and a mining conveyor belt according to an embodiment of the utility model;

[0063] Fig.10It is a detection principle diagram of a crack ultrasonic detection device and a mining conveyor belt according to an embodiment of the utility model, wherein (a) represents the detection principle diagram of the mining conveyor belt in a normal state, and (b) represents the detection principle diagram of the mining conveyor belt in a longitudinally torn state. DETAILED DESCRIPTION

[0064] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0065] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0066] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, according to an embodiment of the utility model, a crack ultrasonic detection device for a mining conveyor belt of the utility model can be installed on the lower support frame of the mining conveyor belt to achieve contact with the lower side of the mining conveyor belt, so as to detect the position of cracks (for example, longitudinal tear cracks) on the mining conveyor belt. It specifically includes: a support frame 1, a transmitting and detecting wheel assembly 2 and a receiving and detecting wheel assembly 3 installed on the support frame 1; in this embodiment, along the length direction of the support frame 1, the receiving and detecting wheel assembly 3 are respectively arranged at intervals on both sides of the transmitting and detecting wheel assembly 2. In this embodiment, the transmitting and detecting wheel assembly 2 is in rolling contact with the mining conveyor belt to achieve stable and continuous contact with the mining conveyor belt, which is beneficial to ensuring the measurement effect of the utility model, wherein the transmitting and detecting wheel assembly 2 is provided with a first roller 21 for contacting the mining conveyor belt and an ultrasonic generator 22 for transmitting ultrasonic waves to the mining conveyor belt; wherein the ultrasonic generator 22 is opposite to the mining conveyor belt to achieve the transmission of ultrasonic signals to the mining conveyor belt. In this embodiment, the receiving wheel assembly 3 is in rolling contact with the mining conveyor belt to achieve stable and continuous contact with the mining conveyor belt, which is beneficial to ensuring the measurement effect of the utility model, wherein the receiving wheel assembly 3 is provided with a second roller 31 for contacting the mining conveyor belt and an ultrasonic receiver 32 for receiving ultrasonic waves conducted by the mining conveyor belt. The receiving wheel assembly 3 is opposite to the mining conveyor belt to achieve stable reception of ultrasonic signals transmitted by the mining conveyor belt.

[0067] Combination Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, according to an embodiment of the utility model, the first roller 21 includes: a first axle 211, and a first roller part 212 rotatably connected to the first axle 211; in this embodiment, the first roller part 212 has a hollow first accommodating cavity; the ultrasonic generator 22 is disposed in the first accommodating cavity and fixedly supported on the first axle 211. In this embodiment, in order to facilitate the lead-out of the wire of the ultrasonic generator 22, a hollow channel is provided on the first axle 211, so that by opening the connection position between the first axle 211 and the ultrasonic generator 22, the wire of the ultrasonic generator 22 can be led out from one end along the hollow channel of the first axle 211 to be connected to the corresponding controller.

[0068] Combination Figure 2 and Figure 7As shown, according to an embodiment of the utility model, the first roller part 212 includes: two first connecting flanges 212a symmetrically arranged and a first wheel body 212b installed between the two first connecting flanges 212a; in this embodiment, the first connecting flange 212a and the first wheel body 212b form a first accommodating cavity. Specifically, the first connecting flange 212a is made of metal material, such as aluminum alloy, steel, etc. In this embodiment, the first connecting flange 212a includes: a first annular side plate 212a1 for connecting with the first wheel body 212b and a first shaft sleeve 212a2 coaxially connected to the first annular side plate 212a1. In this embodiment, on the first annular side plate 212a1, the first shaft sleeve 212a2 is protrudingly arranged in a direction away from the first wheel body 212b. In this embodiment, the first connecting flange 212a is rotatably connected to the first wheel shaft 211 through the first shaft sleeve 212a2.

[0069] In this embodiment, the first wheel body 212b is also a hollow annular structure as a whole, and its side wall is connected to the first annular side plate 212a1 of the first connecting flange 212a in a sealed manner to form a sealed first accommodating chamber. The ultrasonic generator 22 is opposite to the middle position of the first wheel body 212b, and the contact position between the first wheel body 212b and the mining conveyor belt can facilitate the accurate positioning of the ultrasonic generator 22, thereby ensuring the accuracy of the measurement. In this embodiment, a coupling agent is filled in the first accommodating chamber, and the filled coupling agent can facilitate the ultrasonic generator 22 to stably and smoothly send out ultrasonic waves.

[0070] In this embodiment, in order to ensure the sealing of the first accommodating cavity, a sealing member may be further provided between the first annular side plate 212a1 and the first axle 211 to prevent leakage of the coupling agent.

[0071] Combination Figure 4 , Figure 5 and Figure 8As shown, according to an embodiment of the utility model, the launch wheel assembly 2 also includes: a first supporting structure 23; in this embodiment, the first supporting structure 23 is used to support the first roller 21 to achieve stable contact between the first roller 21 and the mining conveyor belt. In this embodiment, the first supporting structure 23 includes: a first supporting seat 231, a first buffer assembly 232 and a first connecting seat 233. In this embodiment, the first wheel axle 211 is supported on the first supporting seat 231; wherein the first supporting seat 231 is a U-shaped structure, which has two mutually parallel and spaced first supporting arms 231a, and a first bearing plate 231b for connecting the two first supporting arms 231a. In this embodiment, the two first supporting arms 231a are respectively and vertically fixedly connected to the first bearing plate 231b. In this embodiment, a first positioning block 231a1 for positioning and installing the end of the first wheel axle 211 is provided at one end of the first supporting arm 231a away from the first supporting plate 231b, wherein the first positioning block 231a1 is detachably connected to the end of the first supporting arm 231a, and a first positioning hole matching the end shape of the first wheel axle 211 is formed between the first positioning block 231a1 and the end of the first supporting arm 231a.

[0072] In this embodiment, the upper portion of the inner wall of the first positioning hole can be set as a plane portion, and a limiting plane corresponding to the plane portion is set on the connected first axle 211; in addition, the positions of the plane portions set in the first positioning holes on the two first supporting arms 231a are different, and thus an anti-fool structure can be formed on the two first supporting arms 231a to ensure the constant installation direction of the first axle 211 to ensure reliable and accurate installation.

[0073] like Figure 2 As shown, in this embodiment, the first buffer assembly 232 includes: a first guide rod 2321, a first slider 2322 slidably connected to the first guide rod 2321, and a first spring 2323 sleeved on the first guide rod 2321; in this embodiment, the first spring 2323 is a compression spring, which is arranged at the lower side of the first slider 2322, and is used to provide vertical elastic support for the first slider 2322. In this embodiment, the first guide rod 2321 is a smooth round rod or a smooth prismatic rod with a regular polygonal cross section, wherein a hollow channel matching the shape of the first guide rod 2321 is arranged on the first slider 2322 to achieve sliding connection with the first guide rod 2321.

[0074] Through the above arrangement, the first spring 2323 can provide elastic supporting force, which can effectively realize stable support for the first roller 21, and can fully press it against the mining conveyor belt to ensure reliable contact, which is beneficial to improving the detection accuracy of the utility model.

[0075] In this embodiment, the first guide rod 2321 is supported on the first connecting seat 233; wherein rod support seats are provided at opposite ends of the first guide rod 2321, and the rod support seats are fixed on the first connecting seat 233 to realize the positioning and installation of the first guide rod 2321. In this embodiment, in order to realize the stable support of the first supporting seat 231, two spaced first buffering components 232 can be provided to realize the stable support of the first supporting seat 231.

[0076] In this embodiment, the first sliding block 2322 is connected to the first supporting seat 231 by a connecting piece such as a threaded connecting piece.

[0077] In this embodiment, the first connecting seat 233 is a plate-shaped structure as a whole, which can conveniently realize the installation and fixation of the first buffer assembly 232 and the fixed installation with the supporting frame 1.

[0078] Through the above arrangement, the first support structure 23 is detachable, and its components can be flexibly replaced and repaired. In addition, different structures can be replaced according to the needs of different installation positions, which effectively improves the use flexibility of the utility model.

[0079] Combination Figure 4 and Figure 6 As shown, according to an embodiment of the utility model, the receiving wheel detection assembly 3 also includes: a speed sensor 33; wherein the speed sensor 33 is in rolling contact with the second roller 31. The speed sensor 33 can detect the rotation speed and rotation distance of the second roller 31 to realize the positioning of the detection position. In this embodiment, the speed sensor 33 is implemented by an encoder, wherein a rubber contact wheel can be set on the rotating shaft of the speed sensor 33, and the rotation of the second roller 31 can be transmitted to the rubber contact wheel through the rolling contact between the rubber contact wheel and the side of the second roller 31, thereby realizing the synchronization of rotation. Among them, by adopting the rubber contact wheel, it can effectively increase the contact friction with the second roller 31, avoid slipping and losing numbers, and thus is beneficial to improving the accuracy of measurement. In addition, by adopting the rubber contact wheel, flexible contact with the contact position can be achieved, which can effectively reduce the vibration of the contact position, which is beneficial to improving the accuracy of measurement. In this embodiment, by collecting the encoder pulse number and analyzing the pulse interval, the rotation angle and speed of the encoder can be obtained, and the distance and speed of the mining conveyor belt can be obtained by the encoder rotating wheel and the outer wheel diameter. It should be noted that the speed sensor 33 can also be set on the launch wheel assembly 2, and its installation method is consistent with the above method and will not be repeated here.

[0080] Combination Figure 4 , Figure 5 and Figure 8As shown, according to an embodiment of the utility model, the second roller 31 includes: a second axle 311, and a second roller part 312 rotatably connected to the second axle 311; in this embodiment, the second roller part 312 has a hollow second accommodating cavity; the ultrasonic receiver 32 is arranged in the second accommodating cavity and fixedly supported on the second axle 311. In this embodiment, in order to facilitate the lead-out of the ultrasonic receiver 32 wire, a hollow channel is arranged on the second axle 311, so that by opening the connection position between the second axle 311 and the ultrasonic receiver 32, the wire of the ultrasonic receiver 32 can be led out from one end along the hollow channel of the second axle 311 to be connected to the corresponding controller.

[0081] like Figure 8 As shown, according to an embodiment of the utility model, the second roller part 312 includes: two second connecting flanges 312a symmetrically arranged and a second wheel body 312b installed between the two second connecting flanges 312a; in this embodiment, the second connecting flange 312a and the second wheel body 312b form a second accommodating cavity. Specifically, the second connecting flange 312a is made of metal material, such as aluminum alloy, steel, etc. In this embodiment, the second connecting flange 312a includes: a second annular side plate 312a1 for connecting with the second wheel body 312b and a second shaft sleeve 312a2 coaxially connected to the second annular side plate 312a1. In this embodiment, on the second annular side plate 312a1, the second shaft sleeve 312a2 is protrudingly arranged in a direction away from the second wheel body 312b. In this embodiment, the second connecting flange 312a is rotatably connected to the second wheel shaft 311 through the second shaft sleeve 312a2.

[0082] In this embodiment, the second wheel body 312b is also a hollow annular structure, and its side wall is connected to the second annular side plate 312a1 of the second connecting flange 312a in a sealed manner to form a sealed second accommodating cavity. The ultrasonic receiver 32 is opposite to the middle position of the second wheel body 312b, and the contact position between the second wheel body 312b and the mining conveyor belt can facilitate the accurate positioning of the ultrasonic receiver 32, thereby ensuring the accuracy of the measurement. In this embodiment, a coupling agent is filled in the second accommodating cavity, and the filled coupling agent can facilitate the ultrasonic receiver 32 to stably and smoothly receive ultrasonic waves.

[0083] In this embodiment, in order to ensure the sealing of the second accommodating cavity, a sealing member may be further provided between the second annular side plate 312a1 and the second axle 311 to prevent leakage of the coupling agent.

[0084] like Figure 8As shown, according to an embodiment of the utility model, the receiving wheel detection assembly 3 also includes: a second supporting structure 34; in this embodiment, the second supporting structure 34 is used to support the second roller 31, so as to achieve stable contact between the second roller 31 and the mining conveyor belt. It specifically includes: a second supporting seat 341, a second buffer assembly 342, a rotating seat 343 and a second connecting seat 344. In this embodiment, the second wheel axle 311 is supported on the second supporting seat 341; wherein the second supporting seat 341 is a U-shaped structure, which has two second supporting arms 341a that are parallel to each other and spaced apart, and a second bearing plate 341b for connecting the two second supporting arms 341a. In this embodiment, the two second supporting arms 341a are respectively and vertically fixedly connected to the second bearing plate 341b. In this embodiment, a second positioning block 341a1 for positioning and installing the end of the second wheel axle 311 is provided at one end of the second supporting arm 341a away from the second supporting plate 341b, wherein the second positioning block 341a1 is detachably connected to the end of the second supporting arm 341a, and a second positioning hole matching the end shape of the second wheel axle 311 is formed between the second positioning block 341a1 and the end of the second supporting arm 341a.

[0085] In this embodiment, the upper portion of the inner wall of the second positioning hole can be set as a plane portion, and a limiting plane corresponding to the plane portion is set on the connected second axle 311; in addition, the positions of the plane portions set in the second positioning holes on the two second supporting arms 341a are different, and thus an anti-fool structure can be formed on the two second supporting arms 341a to ensure the constant installation direction of the second axle 311 to ensure reliable and accurate installation.

[0086] In this embodiment, the second buffer assembly 342 includes: a second guide rod 3421, a second slider 3422 slidably connected to the second guide rod 3421, and a second spring 3423 sleeved on the second guide rod 3421; in this embodiment, the second spring 3423 is a compression spring, which is arranged at the lower side of the second slider 3422 and is used to provide vertical elastic support for the second slider 3422. In this embodiment, the second guide rod 3421 is a smooth round rod or a smooth prismatic rod with a regular polygonal cross section, wherein a hollow channel matching the shape of the second guide rod 3421 is arranged on the second slider 3422 to achieve sliding connection with the second guide rod 3421.

[0087] In this embodiment, the second guide rod 3421 is supported on the rotating seat 343; wherein rod support seats are provided at opposite ends of the second guide rod 3421, and the rod support seats are fixed on the rotating seat 343 to realize the positioning and installation of the second guide rod 3421. In this embodiment, in order to realize the stable support of the second support seat 341, two spaced second buffer components 342 can be provided to realize the stable support of the second support seat 341.

[0088] In this embodiment, the second slider 3422 is connected to the second support seat 341 by a connector such as a threaded connector.

[0089] In the present embodiment, the rotating seat 343 and the second connecting seat 344 are rotatably connected, wherein the second connecting seat 344 is provided with an angle locking member 344a for locking the rotation angle of the rotating seat 343. In the present embodiment, the rotating seat 343 and the second connecting seat 344 are both plate-shaped structures as a whole, and a rotating shaft is provided at the middle position to realize the relative rotation of the rotating seat 343 and the second connecting seat 344. In the present embodiment, the angle locking member 344a can be provided as a threaded locking member (such as a screw), and when the relative angle of the rotating seat 343 and the second connecting seat 344 is adjusted, the locking effect of the adjustment process is realized by loosening or locking the angle locking member 344a. In the present embodiment, an arc groove can be provided on the rotating seat 343, and the angle locking member 344a passes through the arc groove to limit the rotation angle range of the rotating seat 343, for example, the angular rotation range of the rotating seat 343 relative to the second connecting seat 344 is ±30°.

[0090] In this embodiment, a plurality of angle locking members 344 a may be provided to achieve stable locking of the rotating seat 343 .

[0091] Through the above arrangement, the second support structure 34 is detachably arranged, and its components can be flexibly replaced and repaired. In addition, different structures can be replaced according to the needs of different installation positions, which effectively improves the use flexibility of the utility model.

[0092] In addition, the second supporting structure 34 can also realize flexible adjustment of the inclination angle of the second roller 31 through the arranged rotating seat 343, so as to realize more accurate angle control of the second roller 31 relative to the mining conveyor belt, especially the vertical and accurate contact position of the second roller 31 and the mining conveyor belt, and also the ultrasonic receiver 32 can be better aligned with the mining conveyor belt, which is more beneficial to the stable and reliable reception of ultrasonic waves.

[0093] like Figure 4As shown, according to an embodiment of the utility model, the ultrasonic crack detection device for a mining conveyor belt of the utility model further includes: a spray assembly 4. The spray assembly 4 is used to spray coupling agent between the first roller 21 and the mining conveyor belt, and between the second roller 31 and the mining conveyor belt. On the one hand, the small gaps between the contact surfaces can be filled, so that the trace air in these gaps does not affect the penetration of ultrasound; on the other hand, the acoustic impedance difference between the roller and the mining conveyor belt is reduced through the "transition" effect of the coupling agent, thereby reducing the reflection loss of ultrasonic energy at this interface. It also plays a "lubricating" role, reducing the friction between the probe wheel and the conveyor belt, so that the probe wheel can roll flexibly. This is beneficial to achieve reliable transmission of ultrasonic waves. In this embodiment, the spray assembly 4 includes: a container for holding the coupling agent, a liquid pump and a spray structure; wherein the spray structure includes: a bamboo tube and a spray head detachably connected to the bamboo tube; in this embodiment, the spray structure corresponds to the first roller 21 and the second roller 31 and is arranged at intervals.

[0094] In this embodiment, the spray head is used to spray the coupling agent on the mining conveyor belt; wherein, along the transmission direction of the mining conveyor belt, the spray position of the spray head is in front of the contact position between the first roller 21 and the second roller 31 and the mining conveyor belt. It should be noted that the spray head can be replaced as needed, for example, it can be set to a spray head in a spray mode according to the scene of use.

[0095] Through the above-mentioned configuration, the spray assembly 4 is provided on the crack ultrasonic detection device, so that the coupling agent can be continuously sprayed on the mining conveyor belt, so that the ultrasonic signal transmission path is stable and reliable during the detection process of the utility model, and the detection capability of the utility model is further effectively guaranteed. In addition, by placing the spray position of the spray head in front of the contact position between the roller and the mining conveyor belt in the transmission direction of the mining conveyor belt, the coupling agent can be pre-sprayed, and the ultrasonic transmission path is pre-optimized, which further effectively guarantees the detection effect of the utility model.

[0096] like Figure 1 As shown, according to one embodiment of the utility model, the support frame 1 is an overall truss structure, which includes: an intermediate support portion 11 and side support portions 12 respectively arranged at both ends of the length direction of the intermediate support portion 11; in this embodiment, the side support portion 12 is inclined relative to the intermediate support portion 11 in an upward direction, so that the support frame 1 can be in a "V" shape; wherein, the transmitting probe wheel assembly 2 is installed on one side of the intermediate support portion 11; the receiving probe wheel assembly 3 is installed on one side of the side support portion 12; and, along the transmission direction of the mining conveyor belt, the transmitting probe wheel assembly 2 and the receiving probe wheel assembly 3 are on the same side of the support frame 1.

[0097] In this embodiment, the inclination angle of the side support portion 12 relative to the middle support portion 11 can be matched according to the shape of the applicable mining conveyor belt to achieve matching contact between the transmitting probe wheel assembly 2 and the receiving probe wheel assembly 3 and the mining conveyor belt.

[0098] In this embodiment, the middle support portion 11 and the side support portion 12 can be connected to each other by welding or threading.

[0099] In this embodiment, in order to facilitate the transportation and installation of the utility model, a carrying handle 13 and a mounting support 14 can be further provided on the side support portion 12. The mounting support 14 can be used to connect with the mining conveyor belt support. The carrying handle 13 can facilitate the transportation of the entire ultrasonic crack detection device.

[0100] In order to further illustrate the utility model, the detection process thereof is further elaborated.

[0101] Combination Figure 1 and Fig. 9 As shown, the ultrasonic crack detection device is constituted by arranging a transmitting wheel assembly 2 in the middle and arranging receiving wheel assemblies 3 at equal intervals on both sides. Among them, the supporting frame 1 is fixedly connected to the supporting structure below the mining conveyor belt, and the positions of the transmitting wheel assembly 2 and the receiving wheel assembly 3 are adjusted so that the first roller 21 and the second roller 31 are respectively against the mining conveyor belt. At this time, the first spring 2323 in the first buffer assembly 232 and the second spring 3423 in the second buffer assembly 342 are respectively in a compressed state to achieve stable and reliable contact between the first roller 21 and the second roller 31 and the mining conveyor belt. In this embodiment, the mining conveyor belt is a "V"-shaped structure as a whole. For this reason, the distribution positions of the receiving wheel assembly 3 and the transmitting wheel assembly 2 are matched with the shape of the mining conveyor belt, and during the installation process, the inclination angles of the receiving wheel assembly 3 and the transmitting wheel assembly 2 need to be adjusted and fixed so that the ultrasonic generator 22 and the ultrasonic receiver 32 are respectively opposite to the mining conveyor belt.

[0102] For further information, see Fig.10 , start the mining conveyor belt, and when the mining conveyor belt works normally, the ultrasonic generator 22 sends an ultrasonic signal to the mining conveyor belt, and the ultrasonic receiver 32 can receive the ultrasonic signal coupled to the belt by the ultrasonic generator 22, see Fig.10 (a); When a longitudinal tear occurs in the belt, the ultrasonic wave propagation path in the belt is blocked, and the ultrasonic receiver 32 will not receive the corresponding signal, see Fig.10 Furthermore, the longitudinal tear of the belt can be monitored and judged according to the attenuation of the received signal.

[0103] Furthermore, in order to locate the longitudinal tear, the position where the longitudinal tear occurs is determined by the speed sensor 33 .

[0104] In this embodiment, in order to inject ultrasonic sound energy into the mining conveyor belt, the first wheel body 212b of the first roller 21 is coupled to the mining conveyor belt, and the rubber and steel wire matrix on the mining conveyor belt becomes the propagation path of the ultrasonic sound energy, and is sensed by the receiving wheel assembly 3 located at two different positions, wherein the ultrasonic receiver 32 is also received by the second wheel body 312b of the second roller 31.

[0105] In this embodiment, when a longitudinal tear occurs between the transmitting probe wheel assembly 2 and the receiving probe wheel assembly 3, the acoustic energy level reaching the receiving probe wheel assembly 3 will be reduced or completely lost, and the reduction in energy level is evaluated for real-time detection of the longitudinal tear.

[0106] In this embodiment, in order to further ensure the stable and reliable transmission of the ultrasonic signal between the transmitting probe wheel assembly 2 and the receiving probe wheel assembly 3, a coupling agent (e.g., water) may be sprayed on each roller position through the spray assembly 4 to ensure that each roller is well coupled with the mining conveyor belt during rotation. In this embodiment, in order to ensure the accuracy of the coupling agent spraying, the spray assembly 4 may be adjusted in advance to ensure the reliability and stability of the entire detection process.

[0107] The above contents are merely examples of specific solutions of the present invention. For the equipment and structures not described in detail, it should be understood that they are implemented by adopting the general equipment and general methods available in the art.

[0108] The above is only one solution of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crack ultrasonic detection device for a conveyor belt for mining, characterized in that: include: A support frame (1), a transmitting probe wheel assembly (2) and a receiving probe wheel assembly (3) mounted on the support frame (1); Along the length direction of the support frame (1), the receiving wheel assembly (3) is arranged at intervals on both sides of the transmitting wheel assembly (2); The transmitting and detecting wheel assembly (2) is provided with a first roller (21) for contacting the mining conveyor belt and an ultrasonic generator (22) for transmitting ultrasonic waves to the mining conveyor belt; The receiving and detecting wheel assembly (3) is provided with a second roller (31) for contacting the mining conveyor belt and an ultrasonic receiver (32) for receiving ultrasonic waves conducted by the mining conveyor belt.

2. The ultrasonic crack detection device according to claim 1, characterized in that: The first roller (21) comprises: a first wheel shaft (211), a first roller part (212) rotatably connected to the first wheel shaft (211); The first roller part (212) has a hollow first accommodating cavity; The ultrasonic generator (22) is disposed in the first accommodating cavity and is fixedly supported on the first wheel shaft (211). The first accommodating cavity is filled with coupling agent.

3. The ultrasonic crack detection device according to claim 2, characterized in that: The first roller part (212) comprises: two first connecting flanges (212a) symmetrically arranged with respect to each other and a first wheel body (212b) installed between the two first connecting flanges (212a); The first accommodating chamber is formed between the first connecting flange (212a) and the first wheel body (212b).

4. The ultrasonic crack detection device according to claim 3, characterized in that: The launch-probe wheel assembly (2) further comprises: a first supporting structure (23); The first supporting structure (23) comprises: a first supporting seat (231), a first buffer assembly (232) and a first connecting seat (233); The first wheel axle (211) is supported on the first supporting seat (231); The first buffer assembly (232) comprises: a first guide rod (2321), a first slider (2322) slidably connected to the first guide rod (2321), and a first spring (2323) sleeved on the first guide rod (2321); The first spring (2323) is arranged on the lower side of the first sliding block (2322) and is used to provide elastic support for the first sliding block (2322) in a vertical direction; The first guide rod (2321) is supported on the first connecting seat (233); The first sliding block (2322) is connected to the first supporting seat (231).

5. The ultrasonic crack detection device according to claim 4, characterized in that: The receiving wheel detection assembly (3) further comprises: a speed sensor (33); The speed sensor (33) is in rolling contact with the second roller (31).

6. The ultrasonic crack detection device according to claim 5, characterized in that: The second roller (31) comprises: a second wheel shaft (311), and a second roller part (312) rotatably connected to the second wheel shaft (311); The second roller part (312) has a hollow second accommodating cavity; The ultrasonic receiver (32) is arranged in the second accommodating cavity and is fixedly supported on the second wheel axle (311); The second accommodating cavity is filled with coupling agent.

7. The ultrasonic crack detection device according to claim 6, characterized in that: The second roller part (312) comprises: two second connecting flanges (312a) symmetrically arranged with respect to each other and a second wheel body (312b) installed between the two second connecting flanges (312a); The second accommodating chamber is formed between the second connecting flange (312a) and the second wheel body (312b).

8. The ultrasonic crack detection device according to claim 7, characterized in that: The receiving and detecting wheel assembly (3) further comprises: a second supporting structure (34); The second supporting structure (34) comprises: a second supporting seat (341), a second buffer assembly (342), a rotating seat (343) and a second connecting seat (344); The second wheel axle (311) is supported on the second supporting seat (341); The second buffer assembly (342) comprises: a second guide rod (3421), a second slider (3422) slidably connected to the second guide rod (3421), and a second spring (3423) sleeved on the second guide rod (3421); The second spring (3423) is arranged on the lower side of the second slider (3422) and is used to provide elastic support for the second slider (3422) in a vertical direction; The second guide rod (3421) is supported on the rotating seat (343); The second sliding block (3422) is connected to the second supporting seat (341); The rotating seat (343) and the second connecting seat (344) are rotatably connected, wherein the second connecting seat (344) is provided with an angle locking member (344a) for locking the rotation angle of the rotating seat (343).

9. The ultrasonic crack detection device according to claim 8, characterized in that: Also includes: Spray assembly (4); The spray assembly (4) comprises: a container for containing coupling agent, a liquid pump and a spray structure; The spray structure comprises: a bamboo tube and a spray head detachably connected to the bamboo tube; The spray structures are respectively arranged corresponding to the first roller (21) and the second roller (31) and are spaced apart from each other; The spray head is used to spray coupling agent on the mining conveyor belt; Along the transmission direction of the mining conveyor belt, the spraying position of the spray head is located in front of the contact position between the first roller (21) and the second roller (31) and the mining conveyor belt.

10. The ultrasonic crack detection device according to claim 9, characterized in that: The support frame (1) is in the form of a truss structure as a whole, comprising: a middle support portion (11) and side support portions (12) respectively arranged at both ends of the middle support portion (11) in the length direction; The side support portion (12) is arranged to be inclined in an upward direction relative to the middle support portion (11); The launch probe wheel assembly (2) is installed on one side of the middle support part (11); The receiving and detecting wheel assembly (3) is installed on one side of the side supporting part (12); Along the transmission direction of the mining conveyor belt, the transmitting probe wheel assembly (2) and the receiving probe wheel assembly (3) are located on the same side of the support frame (1).

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