Coal mine underground belt fracture emergency repair device and belt conveying device

Abstract

The utility model provides a kind of coal mine underground belt fracture emergency repair device and belt conveyor, it is related to coal mine operation technical field. Including clamping structure and repair structure, clamping structure is made of multiple fixture units, fixture unit includes base, mechanical clamp and multistage connecting assembly, mechanical clamp is used to clamp the belt that will soon fracture, multistage connecting assembly connects mechanical clamp and base, for driving mechanical clamp to move, fixture unit is connected with belt transport support by base, repair structure includes glue injection component. By the clamping structure that can be installed on belt conveyor to the belt is clamped, and utilize repair structure to carry out emergency repair, provide help for the efficient belt fracture repair work under complex coal mine environment.

Description

Technical Field

[0001] This utility model relates to the field of underground coal mine operation technology, and in particular to an emergency repair device for broken conveyor belts and a conveyor belt transport device for underground coal mines. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Underground belt conveyor systems in coal mines are crucial transportation equipment. Over extended periods, belts may break or loosen, potentially leading to production interruptions, equipment damage, and other safety accidents. Current technologies can locate and identify partial or impending breaks in the belt before complete breakage through various methods such as belt pressure detection or image crack detection. However, effectively implementing emergency measures in response to belt breakage warnings remains a critical challenge. Due to the complex environment of coal mines, belt repair requires rapid connection and emergency repairs, but dim lighting and confined spaces hinder worker movement, especially among multiple workers. Furthermore, the time required for workers to reach the site after receiving a warning is also considerable. Therefore, there is a lack of compact and efficient emergency repair devices for partial or impending belt breaks, designed to address these issues before complete breakage and prevent property damage and safety hazards. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an emergency repair device for broken conveyor belts in coal mines and a conveyor belt transport device. The device uses a clamping structure that can be installed on the conveyor belt to clamp the belt and a repair structure to perform emergency repairs, thus providing assistance for efficient conveyor belt breakage repair work in complex coal mine environments.

[0005] The present invention adopts the following technical solution:

[0006] The first aspect of this utility model provides an emergency repair device for broken conveyor belts in coal mines, including a clamping structure and a repair structure. The clamping structure consists of multiple clamping units, each clamping unit including a base, a mechanical clamp, and a multi-segment connecting assembly. The mechanical clamp is used to clamp the conveyor belt that is about to break. The multi-segment connecting assembly connects the mechanical clamp and the base and is used to drive the mechanical clamp to move. The clamping unit is connected to the conveyor belt support through the base. The repair structure includes an adhesive injection assembly.

[0007] Furthermore, the multi-segment connection assembly includes a first rotary joint, an upper arm, a second pitch joint, a forearm, and a third pitch joint connected in sequence. The first rotary joint is connected to the base, and the third pitch joint is connected to the mechanical clamp.

[0008] Furthermore, the base is fixedly connected to the first rotary joint by a bolt assembly, the flanges at both ends of the first rotary joint are rigidly coupled to the upper arm base, the far end of the upper arm is hinged to the proximal end of the forearm through the second pitch joint, and the end of the forearm is connected to the third pitch joint.

[0009] Furthermore, the mechanical clamp includes a clamping pliers and a limiting plate. The clamping pliers clamp or release the belt through opening and closing movements, and the limiting plate is located at the tail of the clamping pliers to limit the opening angle of the clamping pliers.

[0010] Furthermore, it also includes a hydraulic drive unit, which provides hydraulic driving force to the mechanical clamp and controls the opening and closing movements of the clamping jaws.

[0011] Furthermore, the third pitch joint integrates hydraulic lines, with one end connected to the gripper of the mechanical fixture and the other end connected to the hydraulic drive unit.

[0012] Furthermore, the dispensing structure includes an air gun and a glue gun.

[0013] Furthermore, the base is made of an alloy material.

[0014] Furthermore, the inner surface of the clamping clamp is equipped with a rubber pad.

[0015] The second aspect of this utility model provides a belt conveyor device for underground coal mines, including the belt breakage emergency repair device described in the first aspect.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses an emergency repair device and conveyor belt system for belt conveyor breakage in underground coal mines. It effectively solves the problem of lacking efficient emergency repair methods after belt breakage warnings in existing technologies, significantly improving the safety and reliability of underground conveyor belt systems in coal mines and reducing property losses and safety hazards caused by belt breakage. This utility model utilizes a clamping structure composed of multiple clamping units to quickly clamp a belt about to break, effectively preventing further damage after a breakage warning. The clamping jaws of the mechanical clamps are powered by a hydraulic drive unit, enabling them to quickly and firmly clamp the belt, ensuring its stability during emergency repairs. The clamping units are connected to the conveyor belt support via a base, resulting in a compact overall design suitable for the dim and confined environment of underground coal mines. This design not only saves space but also facilitates rapid emergency repair operations within limited operating areas.

[0018] The air gun and glue gun in this invention's repair structure can quickly inject glue to repair the broken part of the belt after a belt breakage warning. This immediate repair method can complete emergency treatment before the belt completely breaks, avoiding production interruptions and equipment damage caused by a complete belt breakage.

[0019] The multi-segment connecting assembly of this invention can be flexibly adjusted according to the breakage location and angle of the belt, enabling the clamping unit to quickly position and clamp the belt in complex spatial environments, thus improving the efficiency of emergency repair.

[0020] The inner surface of the clamping pliers of this utility model is equipped with a rubber pad, which can provide cushioning when clamping the belt, avoid secondary damage to the belt, and also prevent sparks from being generated between the clamping pliers and the belt due to hard contact, thus further improving the safety of operation.

[0021] This invention effectively reduces the frequency of belt breakage by promptly performing emergency repairs after a belt breakage warning, thereby extending the belt's service life and lowering equipment maintenance costs. It also prevents equipment damage caused by complete belt breakage, protecting the normal operation of the entire belt conveyor system and reducing economic losses due to equipment failure. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a schematic diagram of the clamping structure of the emergency repair device for broken conveyor belts in underground coal mines in Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram showing the positional relationship between the clamping structure and the belt in Embodiment 1 of this utility model;

[0025] Among them, 1. belt, 2. clamping structure, 2-1. base, 2-2. first rotary joint, 2-3. upper arm, 2-4. second pitch joint, 2-5. forearm, 2-6. third pitch joint, 2-7. mechanical clamp, 2-8. limiting plate, 2-9. clamping clamp, 3. belt transport bracket. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Terminology Explanation: The terms "installation", "connection", "linking", and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0028] Example 1:

[0029] This utility model, based on existing technology, proposes an emergency repair device for broken conveyor belts in coal mines to solve the technical problems in the background art. The device includes a clamping structure 2 and a repair structure, such as... Figure 1 As shown, the clamping structure 2 consists of multiple clamping units. Each clamping unit includes a base 2-1, a mechanical clamp 2-7, and a multi-segment connecting assembly. The mechanical clamp 2-7 is used to clamp the belt 1 that is about to break. The multi-segment connecting assembly connects the mechanical clamp 2-7 and the base 2-1, and is used to move the mechanical clamp 2-7. Figure 2 As shown, the clamping unit is connected to the belt transport bracket 3 via the base, and the repair structure includes an adhesive injection assembly.

[0030] In one specific embodiment, the clamping structure 2 is used to clamp and hold the two ends of the broken section of the belt 1 towards the center, maintaining stable pressure at both ends of the belt 1, preventing the belt 1 from loosening or becoming unstable during the repair process, and ensuring a tight fit at the belt joint. Figure 2 As shown, the clamping structure consists of multiple clamping units. The clamping structure employs mechanical clamps, hydraulically loaded. A set of clamps is positioned at regular intervals along the belt support frame. By controlling the belt's stopping position, the breakage point is positioned between two clamping units. These clamping units can be distributed on both sides of the belt to ensure that the belt ends do not loosen or misalign during repair. The position and spacing of the clamping units can be adjusted according to actual conditions. In this embodiment, the base is made of alloy material, ensuring robustness and corrosion resistance.

[0031] In one specific embodiment, the mechanical clamp 2-7 includes a clamping jaw 2-9 and a limiting plate 2-8. The clamping jaw 2-9 clamps or releases the belt 1 through opening and closing movements. The limiting plate 2-8 is disposed at the tail of the clamping jaw 2-9. Figure 1 As shown, this is used to limit the opening angle of the clamping jaws. Mechanical clamp 2-7 has a length of 300mm, a width of 200mm, and a clamping depth of 50mm. The parameters of the above mechanical clamps can be changed according to the actual situation of the belt conveyor.

[0032] The clamping pliers are structurally similar to ordinary pliers, typically U-shaped or C-shaped, and can clamp and release objects by opening and closing the jaws. The core function of the clamping pliers in this embodiment is to firmly grip both ends of the broken belt. The clamping pliers (such as the jaws) are made of high-friction materials, such as rubber, polyurethane, or textured metal, which increases the friction with the belt contact surface by applying vertical pressure, preventing slippage. Considering the belt surface characteristics (such as teeth or texture), the inner side of the jaws in this embodiment is designed with matching teeth or grooves to increase tensile strength through engagement, avoiding failure caused by relying solely on friction. The inner surface of the clamping pliers is equipped with a rubber pad to prevent secondary damage to the belt.

[0033] The hydraulic drive unit utilizes the piston movement of a hydraulic or pneumatic cylinder to rapidly apply uniform pressure to the clamping jaws, making it suitable for dynamic loads or frequent operation conditions. When clamping belts of uneven thickness, the clamping jaw opening and closing degree should be adjusted promptly to ensure uniform pressure distribution.

[0034] In one specific implementation, such as Figure 1 As shown, the multi-segment connection assembly of the clamping structure includes a first rotary joint 2-2, a large arm 2-3, a second pitch joint 2-4, a forearm 2-5, and a third pitch joint 2-6 connected sequentially. The first rotary joint 2-2 is connected to the base 2-1, and the third pitch joint 2-6 is connected to the mechanical clamp. The base 2-1 is fixedly connected to the first rotary joint 2-2 by a bolt assembly. The flanges at both ends of the first rotary joint 2-2 are rigidly coupled to the base of the large arm 2-3, realizing horizontal rotation around the vertical axis as the first degree of freedom. The distal end of the large arm 2-2 is hinged to the proximal end of the forearm 2-5 through the second pitch joint 2-4. The second pitch joint 2-4 integrates a servo motor, forming a second degree of freedom of vertical swinging perpendicular to the horizontal plane. The end of the forearm 2-5 is connected to the third pitch joint 2-6, enabling the forearm 2-5 to drive the third pitch joint 2-6 to swing up and down. The third pitch joint 2-6 integrates a hydraulic pipeline. One end of the hydraulic pipeline is connected to the gripper of the mechanical fixture, and the other end is connected to the hydraulic drive unit to control the clamping and releasing of the mechanical fixture. The multi-segment connecting components drive the movement of the mechanical fixture, including moving the entire mechanical fixture in various directions and opening and closing the gripper of the mechanical fixture.

[0035] In one specific embodiment, the belt breakage emergency repair device further includes a hydraulic drive unit, with the clamping structure working in cooperation with the hydraulic drive unit. The hydraulic drive unit provides hydraulic driving force to the mechanical clamp, controlling the opening and closing movement of the clamping jaws to cause the clamping structure to clamp the broken belt.

[0036] The hydraulic drive unit enables the mechanical clamping fixture of the clamping structure to perform clamping movements, ensuring accurate and smooth alignment of both ends of the belt. The hydraulic drive unit can also adjust the force and movement speed of the repair fixture, ensuring stable operation.

[0037] The hydraulic drive unit consists of a flow valve, an oil pressure gauge, a solenoid directional valve, a hydraulic pump, and a hydraulic cylinder. The hydraulic cylinder is cylindrical, approximately 500mm long and 150mm in diameter. The hydraulic cylinder directly applies clamping force to the gripper, ensuring the broken end of the belt is firmly gripped. The hydraulic pump is relatively small, typically 100mm × 150mm × 200mm. It provides high-pressure hydraulic oil as the system's power source. The pump is connected to the inlet of the solenoid directional valve via a high-pressure oil pipe and is directly connected to the hydraulic lines. The solenoid directional valve controls the flow of hydraulic oil, switching the clamping and releasing actions of the gripper; it is installed between the hydraulic pump and the hydraulic cylinder. The oil pressure gauge is installed on the inlet oil pipe of the hydraulic cylinder to monitor the oil pressure corresponding to the clamping force in real time (e.g., 0-20MPa). The flow valve is connected in series between the hydraulic pump and the solenoid directional valve to regulate the amount of oil entering the hydraulic cylinder, controlling the piston movement speed. The hydraulic pump is connected to the hydraulic lines integrated inside the third pitch joint, and the hydraulic lines are connected to the clamping jaws of the mechanical fixture via quick couplings to form a closed-loop system.

[0038] When the solenoid directional valve is in the neutral position (de-energized), the hydraulic pump output oil returns directly to the oil tank via the directional valve, and the system circulates under no-load. When the solenoid directional valve controls the hydraulic oil flow direction to be positive, the clamping structure is in the open state. When the solenoid valve switches the hydraulic oil flow direction to be negative, the grippers close to clamp the belt. In this embodiment, the direction of hydraulic oil flow towards the hydraulic cylinder is defined as positive.

[0039] In one specific embodiment, the system further includes a motor drive unit. This motor drive unit drives the multi-segment connecting assembly to move, further moving the mechanical clamp until it is clamped onto the belt, and also moves the belt towards the crack location. The motor drive unit includes an electric motor, a drive shaft, and a speed controller. The electric motor is generally an AC motor, similar in appearance to a common power tool motor, with dimensions of approximately 300mm × 200mm × 150mm.

[0040] The motor drive unit is connected to the clamping structure via a mechanical transmission shaft. The drive system moves the mechanical clamp toward the crack via a rotating shaft. The motor drive unit is responsible for precisely adjusting the position of the clamp to ensure accurate alignment of the two ends of the belt.

[0041] In one specific implementation, the adhesive injection structure includes an air gun and a glue gun. Belt repair primarily involves injecting adhesive into the cracks. The air gun is a high-pressure air gun used to remove debris, and the glue gun is used to inject adhesive to repair the belt. The adhesive injection structure can be secured to the belt conveyor with elastic cords to prevent loss, or it can be placed separately near the belt conveyor for manual operation.

[0042] It should be noted that the glue injection structure in this embodiment can also be achieved using other repair tools, as long as they can be used for short-term belt repair and emergency repairs, and are not limited to handheld air guns and glue guns.

[0043] In one specific embodiment, the device may further include an alarm unit, including an audible and visual alarm, for alerting the user to belt breakage. When the belt breaks or the equipment malfunctions, the audible and visual alarm will promptly issue an alarm signal.

[0044] The data acquisition unit includes a tension sensor, a temperature sensor, and a vibration sensor, which are used to collect tension data, temperature data, and vibration data, respectively. The tension sensor monitors changes in belt tension; the temperature sensor monitors belt temperature; and the vibration sensor detects abnormal vibration or friction in the belt.

[0045] The display unit includes a display screen for displaying data acquired by the data acquisition unit.

[0046] The emergency power supply unit, including a high-capacity battery pack and backup power, provides a stable power supply in the event of a main power failure, ensuring normal operation of the equipment. This unit is designed for high efficiency and long operating time, ensuring the equipment remains stable during extended coal mine operations.

[0047] The alarm unit, data acquisition unit, display unit, and emergency power supply unit mentioned above all use existing technology and only play an auxiliary role in the emergency repair of the belt. Adding these units will not affect the setting and use of the clamping structure and repair structure.

[0048] It is important to note that the belt in this embodiment is not completely broken. First, existing belt breakage identification methods, such as laser scanning or pressure recognition by sensors, are used to accurately identify the location of the belt crack. At this point, the belt is not broken, and its operation is stopped. Accurate identification of belt cracks and partial breaks is already existing technology and will not be elaborated upon here. Mechanical clamps from the nearest clamping units on both sides of the breakage point are used to clamp the two ends of the belt towards each other. After clamping, debris is removed using a high-pressure air gun, and the cracked area is cleaned with solvent. The amount of adhesive injected is determined based on the crack size, and spiral filling ensures deep penetration of the adhesive. If the crack width is large (e.g., >5mm), additional fiber tape is laid, and a second injection of adhesive enhances tensile strength. The repaired belt can still operate, avoiding the need to replace the entire belt, thus reducing construction efficiency and maintenance costs.

[0049] Example 2:

[0050] Embodiment 2 of this utility model provides a coal mine underground belt conveyor device, including the belt breakage emergency repair device described in Embodiment 1.

[0051] In this embodiment, the belt conveyor is an existing belt conveyor, which includes a belt and a belt conveyor support for supporting the belt.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An emergency repair device for broken conveyor belts in underground coal mines, characterized in that, It includes a clamping structure and a repair structure. The clamping structure consists of multiple clamping units. Each clamping unit includes a base, a mechanical clamp, and a multi-segment connecting assembly. The mechanical clamp is used to hold the belt that is about to break. The multi-segment connecting assembly connects the mechanical clamp and the base and is used to move the mechanical clamp. The clamping unit is connected to the belt transport bracket through the base. The repair structure includes an adhesive injection assembly.

2. The emergency repair device for broken conveyor belts in coal mines as described in claim 1, characterized in that, The multi-segment connection assembly includes a first rotary joint, an upper arm, a second pitch joint, a forearm, and a third pitch joint connected in sequence. The first rotary joint is connected to the base, and the third pitch joint is connected to the mechanical clamp.

3. The emergency repair device for broken conveyor belts in coal mines as described in claim 2, characterized in that, The base is fixedly connected to the first rotary joint by a bolt assembly. The flanges at both ends of the first rotary joint are rigidly coupled to the upper arm base. The far end of the upper arm is hinged to the proximal end of the forearm through the second pitch joint. The end of the forearm is connected to the third pitch joint.

4. The emergency repair device for broken conveyor belts in coal mines as described in claim 3, characterized in that, The mechanical clamp includes a clamping pliers and a limiting plate. The clamping pliers clamp or release the belt through opening and closing movements. The limiting plate is located at the tail of the clamping pliers and is used to limit the opening angle of the clamping pliers.

5. The emergency repair device for broken conveyor belts in coal mines as described in claim 4, characterized in that, It also includes a hydraulic drive unit, which provides hydraulic driving force to the mechanical clamp and controls the opening and closing movements of the clamping jaws of the mechanical clamp.

6. The emergency repair device for broken conveyor belts in coal mines as described in claim 5, characterized in that, The third pitch joint integrates a hydraulic pipeline, with one end connected to the gripper of the mechanical fixture and the other end connected to the hydraulic drive unit.

7. The emergency repair device for broken conveyor belts in coal mines as described in claim 1, characterized in that, The dispensing assembly includes an air gun and a glue gun.

8. The emergency repair device for broken conveyor belts in coal mines as described in claim 1, characterized in that, The base is made of alloy material.

9. The emergency repair device for broken conveyor belts in coal mines as described in claim 4, characterized in that, The inner surface of the clamping clamp is equipped with a rubber pad.

10. A belt conveyor device for underground coal mines, characterized in that, Includes the belt breakage emergency repair device as described in any one of claims 1-9.

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