A safety protection device for belt conveyors

Abstract

This invention discloses a safety protection device for a belt conveyor, comprising at least two protective mesh panels, at least two uprights, a handrail fixed to the top of the uprights, and a crossbar fixed to the bottom of the uprights. The protective mesh panels are square and have mortises and / or tenons along their edges. The protective mesh panels are connected to each other via mortises and tenons. The uprights, handrails, and crossbars have mortise grooves. The mortise groove openings of the uprights face the other upright. The two ends of the handrails are fixed to the top of the uprights with their mortise groove openings facing downwards. The two ends of the crossbars are fixed to the inner sidewalls of the lower part of the uprights with their mortise groove openings facing upwards. The edges of the protective mesh panels are engaged with the mortise grooves. The protective mesh panels of this invention are interconnected using mortise and tenon interfaces, and then the edges of the protective mesh panels are slidably engaged with the uprights, handrails, and crossbars via the mortise grooves, thereby forming a protective barrier with good expandability, high strength, easy assembly and disassembly, safety and reliability, and reusability. It is particularly suitable for use in narrow spaces within the protective device where frequent maintenance of facilities or equipment is required.

Description

Technical Field

[0001] This invention belongs to the field of safety protection technology, specifically relating to a safety protection device for belt conveyors that is highly expandable, strong, easy to disassemble and assemble, safe and reliable, and reusable. Background Technology

[0002] A belt conveyor is a material conveying machine that continuously transports materials along a fixed route using a conveyor belt as the medium. Also known as a continuous conveyor, conveyors can transport materials horizontally, inclined, and vertically, and can form spatial conveying lines. The conveying line is generally fixed. Conveyors have a large conveying capacity and long conveying distance, and can simultaneously complete several technological operations during the conveying process. With rapid economic development, conveyors have been widely used. Currently, trough-type belt conveyors are the most common. These conveyors consist of an upper trough-type idler roller group and a lower flat idler roller group. During operation, the conveyor belt naturally forms troughs of varying sizes under the support of different types of trough-type idlers, ensuring that materials are safely, smoothly, and efficiently transported to the next process step along the direction of travel. However, conveyor belts require numerous rotating rollers and idlers to operate smoothly. All these rotating components, including the belt itself, are completely exposed without any protection or shielding. Pedestrian walkways and operating platforms are located on both sides of the conveyor. The exposed rotating parts, operating at high speeds, pose a significant safety threat to personnel, equipment inspectors, maintenance workers, and other related staff. Furthermore, if materials accidentally fall during operation, they can bounce off the conveyor's safety release switch, causing a shutdown and severely impacting the next process. To eliminate these hazards, reduce equipment operating risks, and ensure the safety of workers, safety guardrails are typically installed on the rotating parts of the conveyor belt. Traditionally, maintenance personnel directly install protective barriers made of welded steel pipes and wire mesh on the supports on both sides of the belt conveyor, or lock the conveyor corridor to prevent entry. These measures not only directly affect the operation, inspection, maintenance, and monitoring of the belt conveyor, but also have drawbacks. Traditional steel pipe and wire mesh protective barriers are usually made by each user unit using their own materials and welding. They are heavy, difficult to install, lack standardization and specifications, are prone to rust, difficult to maintain, have a simple structure, and the wire mesh used poses safety hazards to workers. Given that one person is usually responsible for multiple belt conveyors or a single long-distance conveyor, the current protective barriers are often difficult for one person to dismantle and install, and the equipment is more likely to cause injury to personnel during operation.

[0003] To address the shortcomings and defects of current conveyor belt guardrails, existing technologies include fixing a base at the bottom of the conveyor belt side and then setting downward-extending connecting rods on both sides of the guardrail to form independent guardrail units. By sequentially inserting the connecting rods on both sides of each guardrail unit into the base, a removable guardrail is formed. During inspection and maintenance, the corresponding guardrail unit can be removed. However, since only the bottom of the guardrail unit bears the force after it is fixed, the center of gravity of the entire guardrail is relatively high, making it prone to tilting or falling over under external forces during use, resulting in poor stability. In addition, some methods involve setting vertical bars at intervals along the conveyor belt, then setting triangular tenons and rectangular tenons on one side of the vertical bars at intervals, and setting tenons at both ends of the protective plate to form a mortise and tenon joint to form a protective barrier, thus ensuring the stability and security of the protective barrier in actual use. However, since the mortise and tenon joint between the protective plate and the vertical bars on both sides is horizontal, it is difficult to remove the protective plate after the vertical bars on both sides are fixed, which is still inconvenient during inspection and maintenance. Moreover, the integral protective plate needs to be customized according to actual needs, which has poor versatility and is difficult to standardize production, resulting in high costs and difficulty in reusability. To address this, existing technologies also involve setting mortises at intervals on both sides of the protective plate, and then setting tenons at intervals on the vertical bars. When in use, the mortises of the protective plate are aligned downwards with the tenons and inserted to form a mortise and tenon joint to form a protective barrier, which facilitates the removal and installation of the protective plate as needed. However, it also suffers from the aforementioned shortcomings of the integral structure of the protective plate. Therefore, it is necessary to study a safety protection device for belt conveyors to solve the problems of safety hazards during the operation of conveyor belts and the inconvenience caused by daily inspection and maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a safety protection device for belt conveyors that is highly expandable, strong, easy to assemble and disassemble, safe and reliable, and reusable.

[0005] The objective of this invention is achieved as follows: It includes at least two protective mesh panels, at least two uprights, a handrail fixedly installed at the top of the uprights, and a horizontal bar fixedly installed at the bottom of the uprights. The protective mesh panels are square and have mortises and / or tenons along their edges. The protective mesh panels are connected to each other via mortises and tenons. The uprights, handrails, and horizontal bars are each provided with tenons along their length. The opening of the tenon in the upright faces the other upright. The two ends of the handrail are fixedly connected to the tops of the uprights on both sides, with the opening of the tenon facing downwards. The two ends of the horizontal bar are fixedly connected to the inner sidewalls of the lower part of the uprights on both sides, with the opening of the tenon facing upwards. The edges of the protective mesh panels are engaged with the tenons.

[0006] Compared with the prior art, the present invention has the following advantages:

[0007] 1. The protective mesh panel of the present invention is provided with mortise and tenon joints on the edge, so that it can be freely spliced ​​in the length and height directions according to actual needs to form a protective structure that meets the protection requirements of belt conveyors in different positions and of different types. It has good expandability. Not only can the protective mesh panels form a stable protective plate through mortise and tenon connection, which can prevent tilting, falling over and the protective mesh panels from falling off during use due to external forces, but the protective mesh panels can also be standardized and pre-produced in the factory, resulting in low usage costs and reusability.

[0008] 2. This invention, by setting mortise and tenon grooves on the posts, handrails, and crossbars, allows the protective mesh panels along the edges of the guardrail to be slidably engaged within these grooves, thus securing the guardrail around its perimeter. This not only enhances the overall rigidity, strength, and stability of the guardrail, eliminating safety hazards and reducing operational risks, but also allows for easy removal by a single person by removing the handrail at the top of the guardrail and then pulling the guardrail out as a whole, facilitating routine inspection and maintenance. In particular, the connection between the posts and handrail via connecting block I not only maintains the overall stability of the guardrail, but also allows for convenient removal of the connecting block I as needed, enabling the removal of the handrail and the overall extraction of the guardrail.

[0009] 3. The present invention provides an upward-opening "U"-shaped reinforcing buckle plate on the side of the column, and then horizontally sets a reinforcing plate or reinforcing rod that is snapped into the reinforcing buckle plate on the outer and / or inner side of the protective net plate, thereby providing support for the mortise and tenon connected protective net plate. This not only prevents the protective net plate from falling off when materials on the conveyor belt accidentally fall and impact the protective plate or when external force hits the protective plate, but also improves the safety of the guardrail. Moreover, the snap-fit ​​connection of the reinforcing plate or reinforcing rod is easy to assemble and disassemble.

[0010] In summary, this invention not only solves the safety hazards of rotating parts during the operation of belt conveyors, but also resolves many difficulties in daily maintenance. At the same time, it provides excellent conditions for the standardization and promotion of safety in belt conveyors. Therefore, it is particularly suitable for use in places where maintenance facilities or equipment are frequently required in narrow spaces such as belt conveyors and other protective devices. It has the characteristics of good expandability, high strength, easy disassembly and assembly, safety and reliability, and reusability. Attached Figure Description

[0011] Figure 1 This is one of the structural schematic diagrams used in this invention;

[0012] Figure 2 for Figure 1 Schematic diagram of the local section structure along the AA direction;

[0013] Figure 3 This is the second schematic diagram of the structure used in this invention;

[0014] Figure 4 for Figure 3Schematic diagram of the partial cross-section structure of BB;

[0015] Figure 5 for Figure 3 Schematic diagram of connecting block I;

[0016] Figure 6 for Figure 3 Schematic diagram of the connecting block II structure;

[0017] Figure 7 for Figure 3 Schematic diagram of the connecting plate structure;

[0018] Figure 8 for Figure 3 Schematic diagram of the local cross-section structure in the CC direction;

[0019] Figure 9 This is one of the schematic diagrams of the protective mesh panel structure of the present invention (front of the composite riveted plate).

[0020] Figure 10 This is the second schematic diagram of the protective mesh structure of the present invention (back side of the mortise plate).

[0021] In the diagram: 1-protective mesh panel, 101-mortise, 102-tenon joint, 103-reinforcing rib, 2-post, 201-positioning groove, 3-handrail, 4-crossbar, 5-mortise and tenon joint, 6-connecting block I, 7-connecting block II, 701-straight plate, 8-connecting plate, 801-vertical connecting part, 802-support plate, 9-positioning plate, 10-reinforcing buckle plate, 11-reinforcing plate, 12-buffer plate, 13-screw. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0023] like Figures 1 to 10 As shown, the present invention includes at least two protective mesh panels 1, at least two uprights 2, a handrail 3 fixedly installed at the top of the uprights 2, and a crossbar 4 fixedly installed at the bottom of the uprights 2. The protective mesh panels 1 are square and have mortises 101 and / or tenons 102 on their edges. The protective mesh panels 1 are connected to each other by mortises 101 and tenons 102. The uprights 2, handrails 3 and crossbars 4 are respectively provided with tenons 5 along their length. The opening of the tenon 5 of the uprights 2 faces the other upright 2. The two ends of the handrail 3 are fixedly connected to the top of the uprights 2 on both sides and the opening of the tenon 5 is downward. The two ends of the crossbar 4 are fixedly connected to the lower inner sidewall of the uprights 2 on both sides and the opening of the tenon 5 is upward. The edge of the protective mesh panel 1 is engaged with the tenon 5.

[0024] The protective mesh panel 1 is made of PC material or has a density of 1.02~1.08 g / cm³. 3 The plastic sheet is made of ABS and nylon.

[0025] like Figure 10 As shown, the protective mesh plate 1 is provided with several raised reinforcing ribs at intervals in the middle of the front and / or back sides, and the reinforcing ribs extend to the side near the mortise 101 and the tenon 102.

[0026] like Figure 1 As shown, the handrail 3 has through holes at both ends and a screw hole at the top of the column 2. The handrail 3 is fixedly connected to the top of the column 2 by screws passing through the through holes and screw holes.

[0027] like Figure 5 As shown, the present invention also includes a connecting block I6 with a "T" or "+" shaped cross section and an "L" shaped structure. The tenon 5 has a "T" or "+" shaped structure. At least one end of the handrail 3 is engaged with the connecting block I6 and engaged with the tenon 5 at the top of the column 2.

[0028] like Figure 6 As shown, the present invention also includes a connecting block II7 with an "L" shaped structure, having a lower part with a "T" or "+" shaped cross section and an upper part with a straight plate 701 extending therefrom. The lower part of the connecting block II7 is engaged with the tenon 5 at the top of the middle column 2, and the upper straight plate 701 is engaged with the tenon 5 of the handrail 3.

[0029] like Figure 7 As shown, the present invention also includes a lower connecting plate 8, which includes a "T"-shaped or "+"-shaped vertical connecting part 801 and a support plate 802 connected to the vertical connecting part 801. The vertical connecting part 801 is engaged with the tenon groove 5 at the lower part of the column 2, and the bottom sides of the crossbar 4 abut against the support plate 802.

[0030] The support plate 802 is provided with a through hole, and the bottom of both sides of the crossbar 4 is provided with screw holes. The crossbar 4 is fixedly connected to the support plate 802 by screws passing through the through hole and the screw hole.

[0031] like Figure 8 As shown, the tenon 5 on the column 2 extends through at least one end along the axial direction, and the lower part of the tenon 5 extending through both ends of the column 2 is provided with several vertical positioning grooves 201 at intervals along the axial direction. A straight plate-shaped positioning plate 9 is engaged in the positioning groove 201, and the bottom end of the lower connecting plate 8 abuts against the positioning plate 9.

[0032] like Figure 9 and 10As shown, the protective mesh plate 1 is divided into a mortise plate with mortises 101 on all four sides and a tenon plate with tenon joints 102 on all four sides, or a composite riveted plate with mortises 101 on two adjacent sides and tenon joints 102 on the other two sides.

[0033] like Figure 3 and 4 As shown, the front and / or rear sides of the column 2 are fixedly provided with U-shaped reinforcing buckles 10 with openings facing upwards, and the outer and / or inner sides of the protective mesh plate 1 are provided with reinforcing plates 11 or reinforcing rods with both ends snapped into the reinforcing buckles 10.

[0034] A buffer plate 12 is filled between the protective mesh plate 1 and the reinforcing plate 11 or reinforcing rod.

[0035] The surfaces of the uprights 2, handrails 3, and crossbars 4 are respectively sprayed with yellow and black color blocks spaced 150mm apart.

[0036] Example:

[0037] like Figure 1 and 2 As shown, to meet the requirements of lightweight, good expandability, high strength, and easy assembly / disassembly of protective devices, through comparative analysis and proportioning tests of various materials, ABS+nylon material was selected due to its "toughness, hardness, high rigidity, low price, and ease of processing," with a density of 1.02~1.08 g / cm³. 3 With a density similar to water, one-seventh the density of steel and half the density of aluminum alloy, it offers the best overall performance as the protective mesh panel 1. It is made of ABS+nylon material and integrally molded to form a square mortise plate with mortises 101 and tenon plates with tenon joints 102 on all four sides. Holes are provided in the mortise and tenon plates to reduce weight and cost, and crisscrossing reinforcing ribs 103 are added to the back to improve rigidity. Aluminum alloy profiles with straight tenon joints 5 are used for the columns 2, handrails 3, and crossbars 4 (or straight tenon joints 5 are made on other metal members).

[0038] During installation, first, fix both ends of the crossbar 4 to the lower part of the uprights 2 on both sides with screws 13 to form a semi-enclosed frame. Then, according to the size requirements, mortise and tenon joints are used to connect the mortises and tenons of each protective mesh panel 1 to form a protective panel. After completion, align the edge of the mortised protective panel with the tenon joint 5 and slide it down into the semi-enclosed frame. Next, use the handrail 3 at the top to press the tenon joint into the edge of the protective panel. Then, fix the handrail 3 to the top of the uprights 2 on both sides with screws 13 to form a closed frame, thus completing the assembly of a protective device. In use, simply insert or bolt the mounting base to the brackets on both sides of the belt conveyor.

[0039] When routine maintenance requires the removal of part of the protective device, simply use a screwdriver or other simple tools to remove the screws 13 on the corresponding handrail 3 of the protective device, and the entire protective plate can be pulled upwards, making it easier to maintain the conveyor belt inside the protective device. After maintenance, slide the removed protective plate downwards into the tenon 5 of the column 2, press the handrail 3 back on, and tighten it with the screws 13 to restore it to its original state.

[0040] The aforementioned safety protection device, from research and trial use to mass deployment, has demonstrated good effectiveness and received positive feedback. It is currently being widely adopted at Dahongshan Mining Company, fully fulfilling the safety requirement of "covered during conveyor belt rotation." The next step is to extend and upgrade its application to the protection of other complex, difficult-to-disassemble, and difficult-to-assemble rotating components.

Claims

1. A safety protection device for a belt conveyor, characterized in that, It includes at least two protective mesh panels (1), at least two uprights (2), a handrail (3) fixedly installed at the top of the uprights (2), and a crossbar (4) fixedly installed at the bottom of the uprights (2). The protective mesh panels (1) are square and have mortises (101) and / or tenons (102) on their edges. The protective mesh panels (1) are connected to each other by mortises (101) and tenons (102). The uprights (2), handrails (3) and crossbars (4) are provided with tenons (5) along their length. The opening of the tenon (5) of the uprights (2) faces the other upright (2). The two ends of the handrail (3) are fixedly connected to the top of the two side columns (2) respectively, and the tenon (5) opens downwards. The two ends of the crossbar (4) are fixedly connected to the lower inner sidewall of the two side columns (2) respectively, and the tenon (5) opens upwards. The edge of the protective mesh plate (1) is engaged with the tenon (5). The two ends of the handrail (3) are respectively provided with through holes running vertically, and the top of the column (2) is provided with screw holes. The handrail (3) is fixedly connected to the top of the column (2) by screws passing through the through holes and screw holes. It also includes an "L" shaped structure with a "T" or "+" shaped cross section. The connecting block I (6) has a "T" or "+" shaped tenon (5) and at least one end of the handrail (3) is engaged with the connecting block I (6) and engaged with the tenon (5) at the top of the column (2); it also includes a connecting block II (7) with an "L" shaped structure, the lower part of which has a "T" or "+" shaped cross section and the upper part of which extends with a straight plate (701), the lower part of which is engaged with the tenon (5) at the top of the middle column (2) and the upper part of which is engaged with the tenon (5) of the handrail (3); it also includes a lower connecting plate (8), the lower connecting plate (8) Includes a "T"-shaped or "+"-shaped vertical connecting part (801) and a support plate (802) connected to the vertical connecting part (801). The vertical connecting part (801) is engaged with the tenon (5) at the bottom of the column (2). The bottom sides of the crossbar (4) abut against the support plate (802). The support plate (802) is provided with through holes. The bottom sides of the crossbar (4) are provided with screw holes. The crossbar (4) is fixedly connected to the support plate (802) by screws passing through the through holes and screw holes. The protective mesh plate (1) is made of PC material or has a density of 1.02~1.08 g / cm³. 3 The plastic sheet is made of ABS and nylon.

2. The safety protection device for a belt conveyor according to claim 1, characterized in that, The tenon (5) on the column (2) extends through at least one end along the axial direction. The lower part of the tenon (5) extending through both ends of the column (2) is provided with several vertical positioning grooves (201) at intervals along the axial direction. A straight plate-shaped positioning plate (9) is snapped into the positioning groove (201). The bottom end of the lower connecting plate (8) abuts against the positioning plate (9).

3. The safety protection device for a belt conveyor according to claim 1 or 2, characterized in that, The protective mesh plate (1) is divided into a mortise plate with mortises (101) on all four sides and a tenon plate with tenon mouths (102) on all four sides, or a composite riveted plate with mortises (101) on the adjacent two sides and tenon mouths (102) on the other two sides.

4. The safety protection device for a belt conveyor according to claim 3, characterized in that, The front and / or rear sides of the column (2) are fixedly provided with U-shaped reinforcing buckles (10) with openings facing upwards, and the outer and / or inner sides of the protective mesh plate (1) are provided with reinforcing plates (11) or reinforcing rods with both ends snapped into the reinforcing buckles (10).

5. The safety protection device for a belt conveyor according to claim 4, characterized in that, A buffer plate (12) is filled between the protective mesh plate (1) and the reinforcing plate (11) or reinforcing rod.

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