A belt conveyor broken belt catching system

Abstract

The present invention proposes a belt conveyor break capture system, which belongs to the technical field of belt conveyors and includes a conveyor belt monitoring device for determining whether the conveyor belt is broken and generating a trigger signal when the belt breaks; a capture device including an upper gate brake mechanism and a lower roller brake mechanism. The upper gate brake mechanism is rotatably arranged above both ends of the conveyor belt. When performing capture, it rotates and squeezes the conveyor belt downward. The lower roller brake mechanism contacts the bottom surface of the conveyor belt and, when performing capture, lifts the conveyor belt upward and cooperates with the upper gate brake mechanism to provide a gripping force to the conveyor belt; a control device is connected to the conveyor belt monitoring device and the capture device and is used to send a capture execution instruction to the capture device after receiving a trigger signal. The present invention can significantly improve the stability and reliability of conveyor belt break capture. The upper gate brake mechanism and the lower roller brake mechanism are linked up and down to shorten the time interval from detection to execution, thereby improving the overall response speed of the capture system.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveyors, and in particular to a belt-broken catching system for a belt conveyor. Background Art

[0002] Belt conveyors, due to their advantages such as long conveying distances and large transport volumes, are widely used across various industries. They have become particularly indispensable equipment for the coal mining industry. However, accidents caused by belt breakage during extended use are a frequent occurrence. Because underground coal mining and transportation require belt conveyors to be arranged at an angle, a belt break can cause the belt and its contents to slide downward under the influence of gravity, resulting in serious accidents.

[0003] The broken belt catching devices equipped on existing belt conveyors are mainly divided into two types: mechanical and hydraulic.

[0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the mechanical broken belt catching device lacks reliable catching force and easily causes secondary tearing damage to the belt; the hydraulic broken belt catching device has a long response time and a long catching time. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] Therefore, the object of the present invention is to provide a belt conveyor broken belt catching system with short response time and reliable catching force.

[0007] To achieve the above-mentioned object, the present invention proposes a belt conveyor broken belt catching system, comprising:

[0008] Conveyor belt monitoring device, used to determine whether the conveyor belt is broken and generate a trigger signal when the belt is broken;

[0009] The catching device includes an upper gate brake mechanism and a lower roller brake mechanism. The upper gate brake mechanism is rotatably arranged above both ends of the conveyor belt. When catching is performed, the upper gate brake mechanism rotates to squeeze the conveyor belt downward. The lower roller brake mechanism contacts the bottom surface of the conveyor belt and, when catching is performed, lifts the conveyor belt upward and cooperates with the upper gate brake mechanism to provide a gripping force to the conveyor belt.

[0010] A control device connected to the conveyor belt monitoring device and the capture device, configured to send a capture execution instruction to the capture device after receiving the trigger signal;

[0011] Supports, the supports are arranged outside both ends of the belt conveyor, and one end of the upper gate brake mechanism is connected to the supports;

[0012] The upper gate brake mechanism includes a capture arm, a first track, a trigger mechanism, a slider, a first elastic member, a second track and a second elastic member;

[0013] One end of the capture arm is hinged to the support at a first hinge point, the first track has an arc segment and a straight line segment connected together, the center of the arc segment is concentric with the first hinge point, and the straight line segment points to the first hinge point, the second track is provided on the capture arm, the slider passes through the first track and the second track, the slider is connected to one end of the first elastic member, the other end of the first elastic member is connected to the first fixed point, the slider is also connected to one end of the second elastic member, the other end of the second elastic member is connected to the second fixed point;

[0014] The trigger mechanism is connected to the control device and is arranged on a side of the arc segment away from the straight segment, and is used to lock or release the slider.

[0015] The beneficial effects of the belt conveyor broken belt capture system according to the present invention are as follows: the capture device consists of an upper gate brake mechanism and a lower roller brake mechanism. The upper gate brake mechanism adopts a mechanical type, which rotates downward to squeeze the conveyor belt, and has the advantage of short response time; the lower roller brake mechanism adopts a hydraulic type, which pushes up the conveyor belt when performing capture, forming a two-way clamping force up and down, greatly improving the capture stability and reliability; the upper gate brake mechanism and the lower roller brake mechanism are linked up and down to shorten the time interval from detection to execution, and improve the overall response speed of the capture system.

[0016] According to one embodiment of the present invention, the conveyor belt monitoring device includes a first speed detector and a second speed detector. The first speed detector is used to detect the speed of the tail reversing roller of the belt conveyor, and the second speed detector is used to detect the speed of the driving roller of the belt conveyor. If the difference between the speed of the tail reversing roller and the speed of the driving roller exceeds a preset value, the conveyor belt is determined to be broken and a trigger signal is generated.

[0017] The trigger mechanism is connected to the control device and is arranged on a side of the arc segment away from the straight segment, and is used to lock or release the slider.

[0018] According to one embodiment of the present invention, the first fixing point is provided at one end of the capture arm close to the first hinge point, and the second fixing point is provided on the support and is located below the straight segment.

[0019] According to one embodiment of the present invention, it also includes a first oil cylinder and a second oil cylinder, the piston rod of the first oil cylinder is connected to the grab arm, and is used to move the slider to the trigger mechanism, and the piston rod of the second oil cylinder is connected to the slider, and is used to move the slider from the straight line segment to the circular arc segment.

[0020] According to one embodiment of the present invention, the grab arm is provided with a ratchet roller, a connecting rod and a friction plate in sequence below the end away from the first hinge point, the rotating shaft of the ratchet roller is connected to the upper end of the connecting rod, the lower end of the connecting rod is hinged to the top of the friction plate, and the bottom surface of the friction plate is provided with anti-slip grooves and an anti-slip coating.

[0021] According to one embodiment of the present invention, the lower roller braking mechanism includes a third oil cylinder and a one-way roller, the cylinder body of the third oil cylinder is arranged on the support, the piston rod of the third oil cylinder is connected to the output shaft of the one-way roller, the one-way roller is in contact with the bottom surface of the conveyor belt, and the third oil cylinder is used to lift the conveyor belt upward.

[0022] According to an embodiment of the present invention, both the first elastic member and the second elastic member are springs.

[0023] According to one embodiment of the present invention, both the first oil cylinder and the second oil cylinder are single-acting oil cylinders.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components.

[0026] Figure 1 It is a structural schematic diagram of a belt conveyor broken belt catching system in an initial position proposed by one embodiment of the present invention.

[0027] Figure 2 It is a structural schematic diagram of a capture device of a belt conveyor broken belt capture system proposed in one embodiment of the present invention, in a capture position.

[0028] Figure 3 yes Figure 2 Schematic diagram of the structure of the upper gate brake mechanism of the middle capture device.

[0029] Figure 4The belt conveyor broken belt catching system capture device is in the capture position along the edge Figure 2 Schematic diagram of direction A.

[0030] Figure 5 It is a schematic diagram of the internal structure of the ratchet roller.

[0031] Figure 6 It is a structural diagram of a one-way roller.

[0032] Description of reference numerals:

[0033] 2 is the capturing device, 3 is the control device, 4 is the conveyor belt, 1-1 is the first speed detector, 1-2 is the second speed detector, 2-1 is the upper gate brake mechanism, 2-2 is the lower roller brake mechanism, 2-3 is the support, 2-1-1 is the capturing arm, 2-1-2 is the first oil cylinder, 2-1-3 is the first track, 2-1-4 is the trigger mechanism, 2-1-5 is the second oil cylinder, 2-1-6 is the slider, 2-1-7 is the first elastic member, 2-1-8 is the second track, 2-1-9 is the second elastic member, 2-2-1 is the third oil cylinder, 2-2-2 is the one-way roller, 2-1-1-1 is the ratchet roller, 2-1-1-2 is the connecting rod, and 2-1-1-3 is the friction plate. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0035] Reference below Figures 1 to 6 , describing a belt conveyor broken belt catching system according to an embodiment of the present invention.

[0036] Combine Figure 1 and Figure 2 As shown, the belt conveyor broken belt catching system according to an embodiment of the present invention includes a conveyor belt monitoring device, a catching device 2 and a control device 3.

[0037] The conveyor belt monitoring device is used to determine whether the conveyor belt 4 is broken and generate a trigger signal when it breaks. The conveyor belt monitoring device monitors the operating status of the conveyor belt 4 in real time. The specific implementation of the conveyor belt monitoring device is diverse and not limited to this. For example, the conveyor belt monitoring device can use any one or any combination of sensors, such as a speed sensor, a tension sensor, or an image recognition sensor.

[0038] The catch device 2 includes an upper gate brake mechanism 2-1 and a lower roller brake mechanism 2-2. The upper gate brake mechanism is rotatably disposed above both ends of the conveyor belt 4. When performing the catch, it rotates to squeeze the conveyor belt 4 downward. The lower roller brake mechanism 2-2 contacts the bottom surface of the conveyor belt 4 and, when performing the catch, lifts the conveyor belt 4 upward and cooperates with the upper gate brake mechanism 2-1 to provide a gripping force on the conveyor belt 4. The number of catch devices 2 is selected according to actual needs and is not limited thereto. The upper gate brake mechanism 2-1 is mechanical, which means that the brake mechanism achieves braking through the interaction between mechanical mechanisms or components without the need for external energy. The lower roller brake mechanism 2-2 is hydraulic, which means that the brake structure uses liquid as the working medium to transmit energy and control force.

[0039] The control device 3 is connected to the conveyor belt monitoring device and the capture device 2, and is used to send a capture instruction to the capture device 2 after receiving a trigger signal. The specific type of the control device 3 is set according to actual needs and is not limited to this. For example, the control device 3 can be a host computer or a microcontroller.

[0040] As can be understood, when the belt conveyor breakage capture system is in use, before a breakage occurs, i.e., in its initial state, the upper gate brake mechanism 2-1 of the capture device 2 is positioned above the conveyor belt 4 and is in an energy-storing state. The lower roller brake mechanism 2-2 is in contact with the bottom surface of the conveyor belt 4. After a breakage occurs, the conveyor belt monitoring device sends a trigger signal to the control device 3, which in turn sends a capture command to the capture device 2. The stored energy in the upper gate brake mechanism 2-1 is released, causing it to rotate downward in a very short time. The lower roller brake mechanism 2-2 moves upward, lifting the conveyor belt 4 and providing reliable braking force. After the conveyor belt 4 is repaired, the upper gate brake mechanism 2-1 and the lower roller brake mechanism 2-2 are manually, semi-automatically, or fully automatically returned to their initial positions, i.e., reset.

[0041] According to the belt conveyor broken belt catching system of the embodiment of the present invention, the catching device 2 is composed of an upper gate brake mechanism 2-1 and a lower roller brake mechanism 2-2. The upper gate brake mechanism 2-1 adopts a mechanical type, which rotates downward to squeeze the conveyor belt 4, and has the advantage of short response time; the lower roller brake mechanism 2-2 adopts a hydraulic type, which pushes up the conveyor belt 4 when executing the catch, forming a bidirectional clamping force in the upper and lower directions, greatly improving the stability and reliability of the catch; the upper gate brake mechanism 2-1 and the lower roller brake mechanism 2-2 are linked up and down to shorten the time interval from detection to execution, thereby improving the overall response speed of the catching system.

[0042] In some embodiments, as Figure 1As shown, the conveyor belt monitoring device includes a first speed detector 1-1 and a second speed detector 1-2. The first speed detector 1-1 is used to detect the speed of the belt conveyor's tail reversing roller, while the second speed detector 1-2 is used to detect the speed of the belt conveyor's drive roller. If the difference between the speeds of the tail reversing roller and the drive roller exceeds a preset value, the conveyor belt 4 is determined to be broken and a trigger signal is generated. The preset value is set according to actual needs and is not limited to this. The speed detector can be implemented using an encoder, which has the advantages of simplicity, ease of implementation, and low cost.

[0043] like Figure 2 As shown, the belt conveyor break catch system also includes supports 2-3, which are located outside both ends of the belt conveyor. One end of the upper gate brake mechanism 2-1 is connected to the supports 2-3. The supports 2-3 are used to fix and support the upper gate brake mechanism 2-1. The supports 2-3 can be made of high-strength metal, such as alloy steel.

[0044] Combine Figure 2 and Figure 3 As shown, in some embodiments, the upper gate brake mechanism 2-1 includes a capture arm 2-1-1, a first track 2-1-3, a trigger mechanism 2-1-4, a slider 2-1-6, a first elastic member 2-1-7, a second track 2-1-8 and a second elastic member 2-1-9.

[0045] One end of the capturing arm 2-1-1 is hinged to the support 2-3 at the first hinge point. The first track 2-1-3 has an arc segment and a straight line segment connected together. The center of the arc segment is concentric with the first hinge point, and the straight line segment points to the first hinge point. The second track 2-1-8 is provided on the capturing arm 2-1-1. The slider 2-1-6 runs through the first track 2-1-3 and the second track 2-1-8. The slider 2-1-6 is connected to one end of the first elastic member 2-1-7, and the other end of the first elastic member 2-1-7 is connected to the first fixed point. The slider 2-1-6 is also connected to one end of the second elastic member 2-1-9, and the other end of the second elastic member 2-1-9 is connected to the second fixed point.

[0046] The trigger mechanism 2-1-4 is connected to the control device 3. The trigger mechanism 2-1-4 is arranged on the side of the arc segment away from the straight segment and is used to lock or release the slider 2-1-6.

[0047] It is understood that when the upper gate brake mechanism 2-1 is in operation, the slider 2-1-6 is locked at the upper end of the arc segment by the trigger mechanism 2-1-4, and the first elastic member 2-1-7 and the second elastic member 2-1-9 are stretched, generating elastic potential energy. Upon receiving the capture command, the trigger mechanism 2-1-4 releases the slider 2-1-6. Pulled by the first elastic member 2-1-7, the slider 2-1-6 drives the capture arm 2-1-1 to rotate downward around the arc segment of the first track 2-1-3. When the slider 2-1-6 moves to the straight segment, the second track 2-1-8 coincides with the straight segment. Under the action of the second elastic member 2-1-9, the slider 2-1-6 enters the straight segment near the first hinge point, locking the capture arm 2-1-1.

[0048] In one example, the trigger mechanism 2-1-4 can be an electromagnetic switch. The electromagnetic switch is a latching type with a retractable movable bolt that locks or releases the slider 2-1-6. The slider 2-1-6 can be a cylindrical pin. The first elastic member 2-1-7 and the second elastic member 2-1-9 can be springs or rubber strips.

[0049] To ensure rapid response of the capture arm 2-1-1, the first fixing point is located at the end of the capture arm 2-1-1 near the first hinge point, and the second fixing point is located on the support 2-3, below the straight segment. In other words, the length of the first elastic member 2-1-7 is generally aligned with the tangent direction of the arc segment, and the length of the second elastic member 2-1-9 is generally aligned with the length of the capture arm 2-1-1.

[0050] In some embodiments, as Figure 3 As shown, the belt conveyor broken belt catching system also includes a first cylinder 2-1-2 and a second cylinder 2-1-5. The piston rod of the first cylinder 2-1-2 is connected to the catching arm 2-1-1, optionally in an articulated manner, and is used to move the slider 2-1-6 to the trigger mechanism 2-1-4. The piston rod of the second cylinder 2-1-5 is connected to the slider 2-1-6, optionally in an articulated manner, and is used to move the slider 2-1-6 from the straight section to the circular section. The first cylinder 2-1-2 and the second cylinder 2-1-5 are used to reset the upper gate brake mechanism 2-1. During operation, the second cylinder 2-1-5 first pulls the slider 2-1-6 back from the straight section to the circular section, and then the first cylinder 2-1-2 pulls the slider from the bottom of the circular section back to the top of the circular section. Finally, the trigger mechanism 2-1-4 locks the slider 2-1-6.

[0051] In one example, both the first cylinder 2-1-2 and the second cylinder 2-1-5 are single-acting cylinders, which offer advantages of simple structure and low cost. The positions of the first cylinder 2-1-2 and the second cylinder 2-1-5 are determined based on practical needs and are not limited thereto. For example, the first cylinder 2-1-2 is located above the capture arm 2-1-1, and the second cylinder 2-1-5 is located on the capture arm 2-1-1. The length of their piston rods is aligned with the length of the second elastic member 2-1-9.

[0052] In some embodiments, combined Figure 2 、 Figure 4 and Figure 5 As shown, the grab arm 2-1-1 is provided with a ratchet roller 2-1-1-1, a connecting rod 2-1-1-2 and a friction plate 2-1-1-3 in sequence below the end away from the first hinge point. The rotating shaft of the ratchet roller 2-1-1-1 is connected to the upper end of the connecting rod 2-1-1-2, and the lower end of the connecting rod 2-1-1-2 is hinged to the top of the friction plate 2-1-1-3. The bottom surface of the friction plate 2-1-1-3 is provided with anti-slip grooves and an anti-slip coating. The internal structure of the ratchet roller 2-1-1-1 is shown in FIG. Figure 5 As shown, it can only rotate in one direction. The ratchet roller 2-1-1-1 causes the friction plate 2-1-1-3 to lock the conveyor belt 4, preventing it from further deflecting and achieving secondary capture. The anti-slip pattern on the bottom surface of the friction plate 2-1-1-3 is configured according to actual needs and is not limited to this. For example, the anti-slip pattern is an oblique pattern, which has a high friction coefficient. The anti-slip coating is configured according to actual needs and is not limited to this. For example, the anti-slip coating is a polyurethane rubber coating with excellent wear resistance and anti-slip properties.

[0053] Combine Figure 4 and Figure 6 As shown, the lower roller brake mechanism 2-2 includes a third oil cylinder 2-2-1 and a one-way roller 2-2-2. The cylinder body of the third oil cylinder 2-2-1 is arranged on the support 2-3. The piston rod of the third oil cylinder 2-2-1 is connected to the output shaft of the one-way roller 2-2-2. The one-way roller 2-2-2 is in contact with the bottom surface of the conveyor belt 4. The third oil cylinder 2-2-1 is used to lift the conveyor belt 4 upward. The one-way roller 2-2-2 can only rotate in one direction. A one-way bearing is provided inside the one-way roller 2-2-2. The number of third oil cylinders 2-2-1 is rotated according to actual needs and there is no restriction on this. The specific type of the third oil cylinder 2-2-1 is set according to actual needs and there is no restriction on this. For example, the third oil cylinder 2-2-1 is a double-acting oil cylinder. The double-acting oil cylinder can adapt to working conditions that require frequent reversing or bidirectional loads without relying on external force to reset.

[0054] The third cylinder 2-2-1 drives the one-way rollers 2-2-2, enabling the lower roller brake mechanism 2-2 to move up and down relative to the support 2-3. When capturing a broken belt, the piston rod of the third cylinder 2-2-1 moves upward, providing reliable braking force. When initializing the capture mechanism, the piston rod of the third cylinder 2-2-1 moves downward. The lower roller brake mechanism 2-2 has two sets of one-way rollers 2-2-2 arranged in the direction of travel of the conveyor belt 4. These work in conjunction with the upper gate brake mechanism 2-1 to provide reliable grip on the conveyor belt 4. The one-way roller 2-2-2 in the lower roller brake mechanism 2-2 maintains contact with the conveyor belt 4. Due to the one-way bearing, when the belt conveyor operates normally, the action between the one-way roller 2-2-2 and the conveyor belt 4 is rolling friction, and provides bearing capacity for the conveyor belt 4; when the conveyor belt 4 breaks, the one-way roller 2-2-2 provides braking force to the conveyor belt 4, and cooperates with the upper gate brake mechanism 2-1 to provide reliable grasping force to achieve effective grasping.

[0055] It should be noted that, in the description of the present invention, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0056] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] In the description of the present invention, the terms "left", "right", "front", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0059] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A belt conveyor broken belt catching system, characterized in that: include: A conveyor belt monitoring device for determining whether the conveyor belt (4) is broken and generating a trigger signal when the belt is broken; A capture device (2) includes an upper gate brake mechanism (2-1) and a lower roller brake mechanism (2-2), wherein the upper gate brake mechanism (2-1) is rotatably arranged above both ends of the conveyor belt (4), and rotates to squeeze the conveyor belt (4) downward when capturing is performed, and the lower roller brake mechanism (2-2) contacts the bottom surface of the conveyor belt (4), and pushes the conveyor belt (4) upward when capturing is performed, cooperating with the upper gate brake mechanism (2-1) to provide a gripping force to the conveyor belt (4); A control device (3) is connected to the conveyor belt monitoring device and the capture device (2), and is used to send a capture execution instruction to the capture device (2) after receiving the trigger signal; Supports (2-3), the supports (2-3) being arranged outside both ends of the belt conveyor, and one end of the upper gate brake mechanism (2-1) being connected to the supports (2-3); The upper gate brake mechanism (2-1) comprises a capture arm (2-1-1), a first track (2-1-3), a trigger mechanism (2-1-4), a slider (2-1-6), a first elastic member (2-1-7), a second track (2-1-8) and a second elastic member (2-1-9); the first track (2-1-3) is provided on the support (2-3); One end of the capture arm (2-1-1) is hinged to the support (2-3) at a first hinge point. The first track (2-1-3) has an arc segment and a straight line segment connected together. The center of the arc segment is concentric with the first hinge point, and the straight line segment points to the first hinge point. The second track (2-1-8) is provided on the capture arm (2-1-1). The slider (2-1-6) passes through the first track (2-1-3) and the second track (2-1-8). 6) is connected to one end of the first elastic member (2-1-7), the other end of the first elastic member (2-1-7) is connected to a first fixed point, the slider (2-1-6) is also connected to one end of the second elastic member (2-1-9), the other end of the second elastic member (2-1-9) is connected to a second fixed point; the first fixed point is provided at one end of the capture arm (2-1-1) close to the first hinge point, and the second fixed point is provided on the support (2-3) and is located below the straight segment; The trigger mechanism (2-1-4) is connected to the control device (3), and the trigger mechanism (2-1-4) is arranged on a side of the arc segment away from the straight segment, and is used to lock or release the slider (2-1-6).

2. The belt conveyor broken belt catching system according to claim 1 is characterized in that: The conveyor belt monitoring device comprises a first speed detector (1-1) and a second speed detector (1-2), wherein the first speed detector (1-1) is used to detect the speed of a tail reversing roller of a belt conveyor, and the second speed detector (1-2) is used to detect the speed of a driving roller of the belt conveyor. If the difference between the speed of the tail reversing roller and the speed of the driving roller exceeds a preset value, it is determined that the conveyor belt (4) is broken, and a trigger signal is generated.

3. The belt conveyor broken belt catching system according to claim 1, characterized in that: It also includes a first oil cylinder (2-1-2) and a second oil cylinder (2-1-5), wherein the piston rod of the first oil cylinder (2-1-2) is connected to the capture arm (2-1-1) and is used to move the slider (2-1-6) to the trigger mechanism (2-1-4), and the piston rod of the second oil cylinder (2-1-5) is connected to the slider (2-1-6) and is used to move the slider (2-1-6) from the straight line segment to the circular arc segment.

4. The belt conveyor broken belt catching system according to claim 1, characterized in that: The grab arm (2-1-1) is provided with a ratchet roller (2-1-1-1), a connecting rod (2-1-1-2) and a friction plate (2-1-1-3) in sequence below the end away from the first hinge point. The rotating shaft of the ratchet roller (2-1-1-1) is connected to the upper end of the connecting rod (2-1-1-2), the lower end of the connecting rod (2-1-1-2) is hinged to the top of the friction plate (2-1-1-3), and the bottom surface of the friction plate (2-1-1-3) is provided with anti-slip grooves and an anti-slip coating.

5. The belt conveyor broken belt catching system according to claim 1, characterized in that: The lower roller brake mechanism (2-2) comprises a third oil cylinder (2-2-1) and a one-way roller (2-2-2); the cylinder body of the third oil cylinder (2-2-1) is arranged on the support (2-3); the piston rod of the third oil cylinder (2-2-1) is connected to the output shaft of the one-way roller (2-2-2); the one-way roller (2-2-2) contacts the bottom surface of the conveyor belt (4); and the third oil cylinder (2-2-1) is used to lift the conveyor belt (4) upward.

6. The belt conveyor broken belt catching system according to claim 1, characterized in that: The first elastic member (2-1-7) and the second elastic member (2-1-9) are both springs.

7. The belt conveyor broken belt catching system according to claim 3, characterized in that: The first oil cylinder (2-1-2) and the second oil cylinder (2-1-5) are both single-acting oil cylinders.

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