A protective cover for a belt conveyor

Abstract

The utility model provides a kind of protective cover for belt conveyor, belong to conveyor protection equipment technical field, technical scheme is, a kind of protective cover for belt conveyor, including shell, the inside of shell is equipped with the sleeve of one end opening, the inside of sleeve is equipped with elastic member and locking rod, the one end of elastic member is fixedly connected with the closed end of sleeve, the other end of elastic member is fixedly connected with the one end of locking rod, the other end of locking rod passes through the open end of sleeve and is oppositely arranged with drum end face;The outer wall of sleeve is provided with through hole, the outer wall of locking rod is provided with pin hole corresponding through hole position, pin is inserted in pin hole, one end of pin passes through through hole and is connected with trigger piece by connecting rope, trigger piece is located in the gap between drum and belt.The utility model has the beneficial effect that the device can protect workers and prevent them from being sucked into the drum.

Description

Technical Field

[0001] This utility model belongs to the technical field of conveyor protection equipment, specifically relating to a protective cover for belt conveyors. Background Technology

[0002] If the moving parts of a belt conveyor are directly exposed during operation, workers are prone to accidental contact, leading to safety accidents such as crushing and collisions. Therefore, the industry commonly installs protective covers on the outside of belt conveyors to physically isolate key hazardous parts such as joints and rollers. This not only prevents accidental contact by personnel but also reduces the intrusion of dust and foreign objects into the equipment, ensuring the stable operation of the belt conveyor and forming a fundamental component of the belt conveyor safety protection system.

[0003] As shown in the patent with publication number CN221478515U, the protective cover mechanism includes a cover with an observation window, side supports on both sides of the cover, and a detachable metal mesh that serves both operational observation and basic protection at the observation window. The connection mechanism consists of a plug-in seat, a plug rod, bolts, springs, a protective cover, and other auxiliary components. The plug-in seat is fixed to the side support, one end of the plug rod is connected to the conveyor frame, and the other end is inserted into the plug-in seat through a plug-in connection and then reinforced by bolts. At the same time, the spring is used to prevent the bolts from loosening, and the protective cover covers the bolt heads. The entire structure is fixed to the conveyor belt through a plug-in connection and bolts, with the core protection target being the coverage of the conveyor belt joint.

[0004] However, when maintenance is required while the conveyor is running normally, the protective cover is removed. When workers approach to handle the fault, the edges of clothing, hair, etc., are easily caught in the contact surface by the friction between the rollers and the belt, which can easily cause serious safety accidents such as being dragged or squeezed, posing a great threat to on-site work safety. Utility Model Content

[0005] This invention addresses the problem that when a conveyor needs maintenance under normal operating conditions, the protective cover cannot protect workers, and workers may be caught in the drum. It provides a protective cover for belt conveyors that can protect workers and prevent them from being caught in the drum.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a protective cover for a belt conveyor, including a housing, a sleeve with one open end provided on the inner side of the housing, an elastic element and a locking rod provided inside the sleeve, one end of the elastic element being fixedly connected to the closed end of the sleeve, and the other end of the elastic element being fixedly connected to one end of the locking rod, the other end of the locking rod passing through the open end of the sleeve and being positioned opposite to the end face of the roller; a connecting hole is provided on the outer wall of the sleeve, and a pin hole is provided on the outer wall of the locking rod corresponding to the position of the connecting hole, a pin is inserted into the pin hole, one end of the pin passes through the connecting hole and is connected to a trigger plate through a connecting rope, the trigger plate being located in the gap between the roller and the belt.

[0007] In this technical solution, a sleeve with one open end is provided inside the housing. Inside the sleeve are an elastic element and a locking rod. One end of the elastic element is fixedly connected to the closed end of the sleeve, and the other end is fixedly connected to one end of the locking rod. The other end of the locking rod passes through the open end of the sleeve and is positioned opposite the end face of the roller. A connecting hole is opened on the outer wall of the sleeve, and a pin hole is opened on the outer wall of the locking rod corresponding to the connecting hole. A pin is inserted into the pin hole, and one end of the pin passes through the connecting hole and is connected to a trigger plate via a connecting rope. The trigger plate is located in the gap between the roller and the belt. When a worker's clothing is caught in the gap between the roller and the belt, the trigger plate is simultaneously caught in it. At this time, the trigger plate pulls the pin rod through the connecting rope, causing the locking rod to release. The elastic element pushes the locking rod out and inserts it into the hole on the end face of the roller, thus locking the roller. Therefore, this device can protect workers from being caught in the roller.

[0008] Furthermore, the housing includes two side plates and a top cover. The two side plates are respectively positioned on both sides of the roller, and the top cover is located above the roller. The bottom edges of both sides of the top cover are fixedly connected to the top of the two side plates. Maintenance operations are more convenient. The detachable design of the top cover eliminates the need to remove the entire protective cover. Workers only need to remove the top cover to directly access the area above the roller and the corresponding belt, facilitating quick cleaning of material adhering to the roller, checking belt joint wear, or adjusting the belt position, significantly reducing disassembly steps and time consumption during maintenance. Maintenance flexibility is also greater. If the top cover is damaged, the entire housing does not need to be replaced; only the top cover needs to be disassembled and replaced, reducing maintenance costs and the difficulty of component replacement. Simultaneously, during installation, the two side plates can be fixed in position first, and then the top cover can be assembled, adapting to different on-site installation spaces and avoiding operational limitations caused by overall installation.

[0009] Furthermore, an observation window made of transparent glass is provided on the side panel of the casing. This facilitates real-time monitoring of the equipment status. Operators can directly observe the operation of the rollers inside the side panel, the fit between the belt and the rollers, and whether there are problems such as belt misalignment, material sticking, or joint wear through the transparent glass observation window without removing the protective cover. This allows for timely detection and handling of abnormalities, avoiding delays in troubleshooting due to the inability to visually inspect the equipment. It also ensures safety during observation, as the protective cover does not need to be opened, preventing the exposure of moving parts such as rollers during disassembly. This fundamentally reduces the risk of operators accidentally touching moving parts while observing the equipment, and also prevents foreign objects from falling into the equipment during observation, thus balancing observation needs with safety.

[0010] Furthermore, a guide block is fixed to the outer wall of the sleeve. The length direction of the guide block is the same as the axial direction of the sleeve. A guide groove is opened on the housing at a position corresponding to the sleeve. The sleeve and the guide block pass through the guide groove and can slide along the guide groove. This can precisely limit the rotation of the sleeve. The guide block and the guide groove cooperate to constrain the rotation of the sleeve around its own axis, ensuring that the locking rod always maintains a preset direction opposite to the end face of the drum. This avoids the locking rod from shifting due to the rotation of the sleeve and failing to align with the hole at the end face of the drum. This ensures that the locking rod can be accurately inserted into the hole when it pops out, achieving effective locking of the drum. This also ensures the stability of the sleeve's sliding. The length direction of the guide block is consistent with the axial direction of the sleeve. With the help of the guide groove, it can guide the sleeve to slide along a fixed trajectory, avoiding deviation or jamming during the sliding of the sleeve. Especially during the process of the elastic element pushing the locking rod out, it can ensure that the sleeve drives the locking rod to maintain linear motion, improving the smoothness and reliability of the locking action and reducing the risk of locking failure due to sliding deviation.

[0011] Furthermore, a handle is fixed to the end of the sleeve furthest from the roller. This improves ease of operation; when adjusting the sleeve's position, operators can directly grasp the handle to apply force without directly contacting the sleeve body. This is especially beneficial when the sleeve surface is covered with dust or oil, preventing hands from getting dirty. It also makes it easier to push or pull the sleeve, reducing the effort required during operation. Ensuring operational safety, operating the sleeve via the handle prevents direct hand contact with components such as the connecting holes and pins on the sleeve. This prevents accidental activation of the pins, which could lead to premature unlocking of the locking lever, or hand scraping from the edges of components, reducing safety hazards during operation.

[0012] Furthermore, the handle is fitted with an anti-slip sleeve. This enhances grip friction and prevents slippage. When operating the handle, the operator's hands may be contaminated with dust, oil, or gloves. The anti-slip sleeve increases the frictional contact between the hand and the handle, preventing the handle from slipping even with foreign objects on the hand. This ensures stable force application when pushing or pulling the sleeve, reducing operational deviations or the risk of loss of hand control due to slippage. It also improves grip comfort and reduces hand fatigue. The anti-slip sleeve typically has a certain degree of elasticity, conforming to the contours of the hand and cushioning the direct pressure between the hand and the hard handle. Especially when repeatedly adjusting the sleeve position or holding the handle for extended periods, it reduces hand pressure and discomfort, thus lowering hand fatigue.

[0013] Furthermore, a support frame is fixed to the outer wall of the sleeve. Inside the support frame is a connecting tube. One end of the connecting tube connects to the communicating hole of the sleeve, and the other end extends into the gap between the roller and the belt. The connecting rope passes through the connecting tube, with one end fixedly connected to the pin and the other end fixedly connected to the trigger plate. This effectively protects the connecting rope and extends its service life. The connecting tube wrapping around the connecting rope prevents direct contact and friction between the rope and the moving roller and belt. It also prevents dust and debris in the industrial environment from entangled or adhering to the connecting rope, reducing the risk of wear and breakage and ensuring stable transmission performance. The connecting tube also fixes the direction of the connecting rope, ensuring accurate and reliable triggering. It provides a fixed guide path for the connecting rope, preventing it from shifting, loosening, or tangling due to vibration or belt sway during conveyor operation. This ensures that when the trigger plate is wound in, the connecting rope can stably pull the pin in a fixed direction, without any delay or deviation in force transmission, guaranteeing the timeliness and accuracy of the locking mechanism's triggering.

[0014] Furthermore, the trigger plate has a thin, sheet-like structure made of rubber. It is highly adaptable and can remain stably in the trigger position. The thin sheet structure fits tightly into the gap between the roller and the belt without taking up too much space, thus avoiding interference with the normal operation of the roller and belt. At the same time, the thin shape makes it easier for the trigger plate to be caught in the gap; when foreign objects such as clothing are caught in, it can promptly activate the trigger plate, ensuring a rapid response from the subsequent locking mechanism.

[0015] Furthermore, the connecting rope is a steel wire rope. It has high tensile strength and can stably transmit the triggering force. When the trigger plate is wound in, the pin needs to be pulled through the connecting rope. The steel wire rope has strong tensile strength and will not break due to excessive pulling force, ensuring that the pulling force is effectively transmitted to the pin, guaranteeing smooth triggering of the locking mechanism, and preventing protection failure due to the breakage of the connecting rope.

[0016] Furthermore, the elastic element is a metal spring. It has high structural strength and strong resistance to deformation. The metal material itself has good rigidity and toughness, and can withstand the stress generated by elastic deformation during locking. It is not easily damaged by bending or breaking due to long-term stress or equipment vibration, adapting to the dynamic environment of belt conveyor operation, extending the service life of the elastic element, and reducing the maintenance cost of frequent component replacement.

[0017] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. Strong safety protection: When clothing gets caught in the gap between the roller and the belt, the locking mechanism is triggered to quickly lock the roller and prevent workers from being caught and injured. 2. Easy to operate and maintain; the top cover is removable for easy inspection and maintenance; the observation window allows for real-time monitoring of the equipment status without the need to completely remove the protective cover. 3. The structure is stable and durable, with metal springs, steel wire ropes and other components having good damage resistance, and guide blocks ensuring precise locking, reducing the cost of component replacement and maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the internal structure of a specific embodiment of the present utility model; Figure 4 for Figure 3 Enlarged view of a section at point B in the middle; Figure 5 for Figure 3 Enlarged view of a section at point C.

[0020] In the diagram: 1. Shell; 11. Top cover; 12. Side plate; 13. Guide groove; 2. Sleeve; 21. Elastic element; 22. Locking rod; 23. Connecting hole; 24. Pin hole; 25. Pin rod; 26. Connecting rope; 27. Guide block; 3. Trigger plate; 4. Roller; 5. Belt; 6. Observation window; 7. Handle; 71. Anti-slip sleeve; 8. Support frame; 81. Connecting pipe. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] A protective cover for a belt conveyor, such as Figure 1As shown, the device includes a housing 1, which comprises two side plates 12 and a top cover 11. The two side plates 12 are respectively disposed on both sides of the roller 4, and the top cover 11 is located above the roller 4. The bottom edges of both sides of the top cover 11 are fixedly connected to the top of the two side plates 12 by bolts. The bolts pass through the connection between the top cover 11 and the side plates 12 and are tightened with nuts to form a stable overall structure. An observation window 6 is provided on the side plate 12 of the housing 1. The observation window 6 is made of transparent glass, and the glass is sealed to the edge of the window opening on the side plate 12 by a sealing structure to ensure a clear field of view and prevent dust from entering.

[0023] like Figure 3 As shown, the inner side of the housing 1 is provided with a sleeve 2 with one open end. The sleeve 2 is generally tubular, with the closed end facing away from the roller 4 and the open end facing the roller 4. Inside the sleeve 2, there is an elastic element 21 and a locking rod 22. One end of the elastic element 21 is fixedly connected to the closed end of the sleeve 2, and the other end is fixedly connected to one end of the locking rod 22, so that the locking rod 22 can slide axially inside the sleeve 2. The other end of the locking rod 22 passes through the open end of the sleeve 2 and is positioned opposite to the end face of the roller 4, maintaining an appropriate distance to ensure that the locking rod 22 can be accurately inserted into the hole on the end face of the roller 4 when it pops out.

[0024] like Figure 4 As shown, the outer wall of the sleeve 2 has a connecting hole 23, which penetrates the tube wall of the sleeve 2. The outer wall of the locking rod 22 has a pin hole 24 corresponding to the position of the connecting hole 23. The diameter of the pin hole 24 is adapted to the connecting hole 23. A pin 25 is inserted into the pin hole 24. One end of the pin 25 passes through the connecting hole 23 and extends out of the sleeve 2, while the other end remains in the pin hole 24. The locking rod 22 is limited and locked by the pin 25 passing through both the connecting hole 23 and the pin hole 24.

[0025] One end of the pin 25 extending out of the connecting hole 23 is fixedly connected to one end of the connecting rope 26, and the other end of the connecting rope 26 is fixedly connected to the trigger plate 3, which is located in the gap between the roller 4 and the belt 5. A support frame 8 is also fixed to the outer wall of the sleeve 2. The support frame 8 is fixed to the outside of the sleeve 2 by welding or bolts. A connecting pipe 81 is provided inside the support frame 8, and the connecting pipe 81 is fixed in the internal channel of the support frame 8 by snap-fit ​​or adhesive. One end of the connecting pipe 81 is connected to the connecting hole 23 of the sleeve 2, and the two pipe openings are aligned and sealed. The other end of the connecting pipe 81 extends into the gap between the roller 4 and the belt 5, but does not directly contact the roller 4 or the belt 5 to avoid affecting the operation of the equipment.

[0026] The connecting rope 26 is threaded through the connecting tube 81. One end of the connecting rope 26 is fixedly connected to the pin 25, and the other end is fixedly connected to the trigger plate 3. The connecting tube 81 provides a fixed guide path for the connecting rope 26. Figure 5As shown, the trigger plate 3 is a thin sheet structure made of rubber, and its shape is adapted to the gap between the roller 4 and the belt 5, allowing it to remain in the trigger position without interfering with normal operation. The connecting rope 26 is a steel wire rope with high tensile strength and wear resistance, ensuring stable transmission of tension during triggering. The elastic element 21 is a metal spring, providing sufficient elastic force to push the locking rod 22 out.

[0027] A guide block 27 is fixed to the outer wall of the sleeve 2. The guide block 27 is fixed to the outside of the sleeve 2 by welding, and its length direction is the same as the axial direction of the sleeve 2. A guide groove 13 is opened on the housing 1 at a position corresponding to the sleeve 2. The shape of the guide groove 13 matches the shape of the sleeve 2 and the guide block 27 after combination. The sleeve 2 and the guide block 27 are inserted into the guide groove 13 and can slide along the guide groove 13. The cooperation between the guide block 27 and the guide groove 13 restricts the rotation of the sleeve 2 and ensures that the locking rod 22 always maintains the correct direction.

[0028] like Figure 2 As shown, a handle 7 is bolted to the end of the sleeve 2 furthest from the roller 4. The handle 7 is connected to the end of the sleeve 2 by welding or threaded connection. The axis of the handle 7 is perpendicular to the axis of the sleeve 2, making it convenient for the operator to grip and operate. An anti-slip sleeve 71 is fitted onto the handle 7. The anti-slip sleeve 71 is a tubular structure made of elastic material, which is tightly fitted onto the outer surface of the handle 7 to increase the friction between the hand and the handle 7, thereby improving the stability and comfort of operation.

[0029] Working process: Before the maintenance begins, the staff first removes the bolts fixing the top cover 11 and the side plate 12, removes the top cover 11, and exposes the internal structure of the housing 1, the roller 4, and the belt 5. At this time, the sleeve 2 is in the initial position, the trigger plate 3 has not yet entered the gap between the roller 4 and the belt 5, the locking rod 22 is locked through the pin 25 passing through the connecting hole 23 and the pin hole 24, and the elastic element 21 is in a compressed state.

[0030] The worker grips handle 7 and pushes sleeve 2 along guide groove 13 towards roller 4. Sleeve 2 slides smoothly with the cooperation of guide block 27 and guide groove 13, causing support frame 8, connecting pipe 81, and connecting rope 26 to move synchronously. Connecting rope 26 pulls trigger plate 3 into the gap between roller 4 and belt 5 and holds it in the trigger position. After confirming that trigger plate 3 is correctly positioned, the worker begins maintenance operations on roller 4, belt 5, or other components.

[0031] During maintenance, if clothing or other foreign objects are accidentally caught in the gap between roller 4 and belt 5, the trigger plate 3 will be pulled in simultaneously. The trigger plate 3 pulls the pin 25 through the connecting rope 26, causing the pin 25 to exit from the pin hole 24 and the connecting hole 23, thus releasing the locking rod 22. The compressed elastic element 21 releases its elastic force, pushing the locking rod 22 to slide axially along the sleeve 2, passing through the open end and inserting into the hole on the end face of roller 4, thereby achieving emergency locking of roller 4 and preventing further injury to personnel.

[0032] After maintenance, the worker grasps handle 7 again and pulls sleeve 2 away from roller 4 along guide groove 13, causing trigger plate 3 to disengage from the gap between roller 4 and belt 5. Then, pin 25 is reinserted into pin hole 24 and connecting hole 23, locking rod 22 again, and elastic element 21 returns to its compressed state. After confirming that all components are in the correct position, top cover 11 is returned to its original position, and bolts are used to secure top cover 11 to the two side plates 12, restoring the equipment to normal operation.

[0033] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. Strong safety protection: When clothing gets caught in the gap between the roller and the belt, the locking mechanism is triggered to quickly lock the roller and prevent workers from being caught and injured. 2. Easy to operate and maintain; the top cover is removable for easy inspection and maintenance; the observation window allows for real-time monitoring of the equipment status without the need to completely remove the protective cover. 3. The structure is stable and durable, with metal springs, steel wire ropes and other components having good damage resistance, and guide blocks ensuring precise locking, reducing the cost of component replacement and maintenance.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective cover for a belt conveyor, characterized in that, The device includes a housing (1), and a sleeve (2) with one open end is provided on the inner side of the housing (1). An elastic element (21) and a locking rod (22) are provided inside the sleeve (2). One end of the elastic element (21) is fixedly connected to the closed end of the sleeve (2), and the other end of the elastic element (21) is fixedly connected to one end of the locking rod (22). The other end of the locking rod (22) passes through the open end of the sleeve (2) and is set opposite to the end face of the roller (4). A connecting hole (23) is provided on the outer wall of the sleeve (2), and a pin hole (24) is provided on the outer wall of the locking rod (22) corresponding to the position of the connecting hole (23). A pin (25) is inserted into the pin hole (24), and one end of the pin (25) passes through the connecting hole (23) and is connected to the trigger plate (3) through the connecting rope (26). The trigger plate (3) is located in the gap between the roller (4) and the belt (5).

2. The protective cover for a belt conveyor according to claim 1, characterized in that, The housing (1) includes two side plates (12) and a top cover (11). The two side plates (12) are respectively disposed on both sides of the roller (4), and the top cover (11) is located above the roller (4). The bottom edges of the two sides of the top cover (11) are respectively fixedly connected to the top of the two side plates (12).

3. The protective cover for a belt conveyor according to claim 2, characterized in that, An observation window (6) is provided on the side plate (12) of the housing (1), and the observation window (6) is made of transparent glass.

4. The protective cover for a belt conveyor according to claim 2, characterized in that, A guide block (27) is fixed on the outer wall of the sleeve (2). The length direction of the guide block (27) is the same as the axial direction of the sleeve (2). A guide groove (13) is opened on the housing (1) at the position corresponding to the sleeve (2). The sleeve (2) and the guide block (27) are inserted into the guide groove (13) and can slide along the guide groove (13).

5. The protective cover for a belt conveyor according to claim 4, characterized in that, A handle (7) is fixed to the end of the sleeve (2) away from the roller (4).

6. The protective cover for a belt conveyor according to claim 5, characterized in that, The handle (7) is fitted with an anti-slip sleeve (71).

7. The protective cover for a belt conveyor according to claim 2, characterized in that, A support frame (8) is fixed on the outer wall of the sleeve (2). A connecting pipe (81) is provided inside the support frame (8). One end of the connecting pipe (81) is connected to the connecting hole (23) of the sleeve (2), and the other end extends into the gap between the roller (4) and the belt (5). The connecting rope (26) is threaded through the connecting pipe (81), and one end of the connecting rope (26) is fixedly connected to the pin (25), and the other end is fixedly connected to the trigger plate (3).

8. The protective cover for a belt conveyor according to claim 7, characterized in that, The trigger sheet (3) is a thin sheet structure and is made of rubber.

9. The protective cover for a belt conveyor according to claim 1, characterized in that, The connecting rope (26) is a steel wire rope.

10. The protective cover for a belt conveyor according to claim 1, characterized in that, The elastic element (21) is a metal spring.

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