Belt-type check device and belt-type conveyor

Abstract

The utility model belongs to the technical field of belt conveyor, especially involves a belt type check device and belt conveyor, belt type check device includes support frame, the arc surface support structure of rear frame body front side department fixed in support frame, the stop structure fixed in the below of support frame, the contour restriction structure fixed in the above of support frame and check belt, form the accommodation space between support frame and contour restriction structure, the fixed end of check belt is fixed in the rear frame body of support frame, check belt from the above of arc surface support structure and from support frame downwardly and go out, prevent the structure of falling off and be fixed in the free end of check belt, belt conveyor includes belt type check device, belt type check device sets up between the upper band body and lower band body of conveyer belt and is close to front cylinder setting, solved the belt conveyor of installing check ware and appears conveyer belt reverse rotation because of the insufficient check torque of belt conveyor and the problem of inconvenient installation when installing check ware to the belt conveyor of not installing check ware.

Description

Technical Field

[0001] This utility model belongs to the technical field of belt conveyors, and particularly relates to a belt backstop device and a belt conveyor. Background Technology

[0002] Currently, backstops are an important safety protection device on lifting and conveying equipment. Their function is to prevent the equipment from reversing due to the influence of its own weight after it stops. They are widely used in equipment that requires backstop function, such as lifting belt conveyors, bucket elevators, and scraper conveyors. Common backstops include roller backstops and wedge backstops.

[0003] Existing belt conveyors fall into two categories: those with pre-installed backstops (primarily for conveyors with an inclination angle exceeding 4 degrees) and those without pre-installed backstops (primarily for horizontal conveying). For belt conveyors with backstops, insufficient backstop torque can occur when the machine stops during material transport, leading to belt breakage and shaft damage. Similarly, belt conveyors without backstops also experience backstop rotation during material transport. To improve safety, additional backstops are necessary. Whether integrated into the drive unit or externally installed, these backstops require connection and coordination with the drive unit. Since the structure of belt conveyors is fixed, backstop installation is quite inconvenient. Utility Model Content

[0004] The purpose of this utility model is to provide a belt backstop device and a belt conveyor, which aims to solve the problems of belt conveyors with backstops rotating in reverse due to insufficient backstop torque, and the inconvenience of installing backstops on belt conveyors without backstops.

[0005] This utility model discloses a belt-type backstop device applied to a belt conveyor. The belt-type backstop device includes a support frame, an arc-shaped support structure fixed to the front side of the rear frame of the support frame, a backstop structure fixed below the support frame, and a contour limiting structure fixed above the support frame. An accommodating space is formed between the support frame and the contour limiting structure. It also includes a backstop belt, the fixed end of which is fixed to the rear frame of the support frame. The backstop belt passes over the arc-shaped support structure and extends downward through the support frame. An anti-detachment structure is fixed at the free end of the backstop belt to prevent it from detaching from the backstop structure when the free end of the backstop belt moves backward.

[0006] As an improvement, the anti-detachment structure is a baffle fixed to the free end of the anti-reverse strap, and the two ends of the baffle extend beyond the sides of the anti-reverse strap.

[0007] As an improvement, the anti-reverse structure includes a left limit seat and a right limit seat spaced apart on both sides of the lower belt body of the conveyor belt of the belt conveyor. Limiting and locking parts are respectively provided at the two ends of the left limit seat and the right limit seat corresponding to the baffle. The distance between the left limit seat and the right limit seat is greater than the width of the anti-reverse belt.

[0008] As an improvement, a cylindrical shaft is provided at the front side of the arc-shaped support structure, which is fixed between the left frame and the right frame of the support frame. The anti-reverse band passes around the arc-shaped support structure and the cylindrical shaft in sequence.

[0009] As an improvement, a limit plate is fixed to the front side of the support frame.

[0010] As an improvement, the contour limiting structure includes multiple support plates spaced apart between the left frame and the right frame of the support frame, each support plate being fixedly connected to the rear frame and the front frame of the support frame, respectively.

[0011] As an improvement, the support plate includes a rear support plate fixed to the rear frame, a front support plate fixed to the front frame, and a connecting plate connecting the upper end of the rear support plate and the upper end of the front support plate. The height of the front support plate is greater than the height of the rear support plate, and the connecting plate and the rear support plate, as well as the connecting plate and the front support plate, are provided with an arc-shaped transition connection.

[0012] As an improvement, a pressure plate is provided at the rear frame, and at least two fastening connectors are provided between the pressure plate and the rear frame, with the fixed end of the anti-reverse strap clamped between the pressure plate and the rear frame.

[0013] As an improvement, the arc-shaped support structure includes a mounting plate and an arc-shaped transition plate fixed to the upper side of the mounting plate. The mounting plate is clamped between the pressure plate and the rear frame, and the fixed end of the anti-reverse strap is clamped between the pressure plate and the mounting plate.

[0014] This utility model also discloses a belt conveyor, which includes a frame, a front roller and a rear roller rotatably mounted on the frame, and a conveyor belt surrounding the front roller and the rear roller. It also includes a belt backstop device, which is disposed between the upper and lower belt bodies of the conveyor belt and is located near the front roller. The support frame is fixedly connected to the frame, and the backstop structure is disposed on the upper side of the lower belt body of the conveyor belt. The free end of the backstop belt and the anti-detachment structure are located at the backstop structure.

[0015] The beneficial effects achieved by adopting the above technical solution are as follows:

[0016] The belt backstop device of this utility model includes a support frame, an arc-shaped support structure fixed to the front side of the rear frame of the support frame, a backstop structure fixed below the support frame, and a contour limiting structure fixed above the support frame. An accommodating space is formed between the support frame and the contour limiting structure. It also includes a backstop belt, the fixed end of which is fixed to the rear frame of the support frame. The backstop belt passes over the arc-shaped support structure and exits downward from the support frame. An anti-detachment structure is fixed at the free end of the backstop belt to prevent it from detaching from the backstop structure when it moves backward. The belt conveyor includes a frame, a front roller and a rear roller rotatably mounted on the frame, and a conveyor belt surrounding the front roller and the rear roller. It also includes a belt backstop device, which is disposed between the upper and lower belt bodies of the conveyor belt and is located near the front roller. The support frame is fixedly connected to the frame. The backstop structure is disposed on the upper side of the lower belt body of the conveyor belt. The free end of the backstop belt and the anti-detachment structure are located at the backstop structure.

[0017] During installation, the belt backstop is placed between the upper and lower belt bodies of the conveyor belt, and is positioned near the front roller of the belt conveyor. The support frame of the belt backstop is fixedly connected to the frame of the belt conveyor, and the backstop structure is set on the upper side of the lower belt body of the conveyor belt. No modifications are required to the structure of the belt conveyor, making installation very convenient.

[0018] When the belt conveyor rotates in the forward direction, it is used to transport materials. The lower belt body moves from the head to the tail of the belt conveyor. Driven by the lower belt body, the free end of the anti-reverse belt and the anti-detachment structure are located at the anti-reverse structure. Under the constraint of the anti-reverse structure, the free end of the anti-reverse belt will not detach from the anti-reverse structure. The anti-reverse belt portion near the rear frame of the support frame is curled up inside the accommodating space between the support frame and the contour limiting structure. The anti-reverse belt is in a slack state and will not affect the operation of the belt conveyor. When the belt conveyor stops, the driving force for forward rotation disappears. When reverse rotation occurs, the lower belt body moves from the head to the tail of the belt. The movement of the tail end of the belt conveyor towards the head end drives the free end of the anti-reverse belt and the anti-detachment structure towards the front roller of the belt conveyor. This pulls out the anti-reverse belt portion that is coiled up inside the accommodating space between the support frame and the contour limiting structure. The free end of the anti-reverse belt and the anti-detachment structure follow the movement of the lower belt body and are wound into the space between the conveyor belt and the front roller. Since the fixed end of the anti-reverse belt is fixed to the rear frame, and the free end of the anti-reverse belt and the anti-detachment structure are clamped between the conveyor belt and the front roller by friction, the anti-reverse belt is in a taut state. The pulling of the anti-reverse belt can increase the anti-reverse force, preventing the belt conveyor from continuing to rotate in the opposite direction and effectively protecting the belt conveyor.

[0019] This utility model's belt backstop device can be easily installed on belt conveyors that already have backstops to enhance the backstop torque, and can also be easily installed on belt conveyors that do not have backstops. It solves the problems of belt conveyors with backstops rotating in reverse due to insufficient backstop torque, and the inconvenience of installing backstops on belt conveyors that do not have backstops. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram (I) of the belt-type backstop device of this utility model;

[0021] Figure 2 This is a three-dimensional structural schematic diagram (II) of the belt-type backstop device of this utility model;

[0022] Figure 3 This is a three-dimensional structural schematic diagram (I) of the belt conveyor of this utility model;

[0023] Figure 4 This is a three-dimensional structural schematic diagram (II) of the belt conveyor of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the belt conveyor in the reverse stop state of this utility model;

[0025] Among them, 10. Support frame; 11. Left frame; 12. Right frame; 13. Rear frame; 14. Front frame; 15. Arc-shaped support structure; 151. Mounting plate; 152. Arc-shaped transition plate; 16. Cylindrical shaft; 17. Pressure plate; 20. Support plate; 21. Rear support plate; 22. Front support plate; 23. Connecting plate; 30. Anti-reverse belt; 40. Baffle; 50a. Left limit seat; 50b. Right limit seat; 51. Vertical plate; 52. Right angle plate; 60. Belt conveyor; 61. Frame; 62. Front roller; 63. Conveyor belt; 70. Limit plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Figures 1 to 5 This is a structural schematic diagram of the belt-type backstop device and belt conveyor of this utility model, wherein, Figure 1 A three-dimensional structural schematic diagram (I) of the belt-type backstop device of this utility model is shown. Figure 2 A three-dimensional structural schematic diagram (II) of the belt-type backstop device of this utility model is shown. Figure 3 A three-dimensional structural schematic diagram (I) of the belt conveyor of this utility model is shown. Figure 4 A three-dimensional structural schematic diagram (II) of the belt conveyor of this utility model is shown. Figure 5 A three-dimensional structural diagram of the belt conveyor of this utility model in the reverse stop state is shown. For ease of description, only the parts relevant to this utility model are shown in the figure.

[0028] It should be noted that if the directional indications (such as up, down, front, back, etc.) involved in this utility model are only used to explain the relative positional relationship between the components in a certain specific posture, the directional indications will change accordingly if the specific posture changes; if the descriptions of "first", "second", etc. involved in this utility model are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0029] Depend on Figures 1 to 5As can be seen, this utility model discloses a belt backstop device applied to a belt conveyor 60. Generally, it is understood that the conveying direction of the belt conveyor 60 is from the tail end to the head end. The belt backstop device is installed between the upper and lower belt bodies of the conveyor belt 63 at the head end of the belt conveyor 60, and is positioned near the front roller 62 of the belt conveyor 60. The belt backstop device includes a support frame 10 and an arc-shaped support fixed to the front side of the rear frame 13 of the support frame 10. The support structure 15, the anti-reverse structure fixed below the support frame 10, and the contour restriction structure fixed above the support frame 10 form an accommodating space between the support frame 10 and the contour restriction structure. It also includes a backstop 30, the fixed end of which is fixed to the rear frame 13 of the support frame 10. The backstop 30 passes over the arc-shaped support structure 15 and extends downward through the support frame 10. At the free end of the backstop 30, there is an anti-detachment structure to prevent the free end of the backstop 30 from detaching from the anti-reverse structure when it moves backward.

[0030] For ease of understanding, combined with Figure 3 , Figure 4 and Figure 5 The installation and working principle of the belt-type backstop device are explained as follows:

[0031] During installation, the belt backstop device is set between the upper and lower belt bodies of the conveyor belt 63, and is positioned near the front roller 62 of the belt conveyor 60. The support frame 10 of the belt backstop device is fixedly connected to the frame 61 of the belt conveyor 60. The backstop structure is set on the upper side of the lower belt body of the conveyor belt 63. No changes need to be made to the structure of the belt conveyor 60, making installation very convenient.

[0032] When the belt conveyor rotates 60 degrees in the forward direction, it is used to transport materials, such as... Figure 3 and Figure 4As shown, the lower belt of conveyor belt 63 moves from the head to the tail of belt conveyor 60. Driven by the lower belt of conveyor belt 63, the free end of anti-reverse belt 30 and the anti-detachment structure are located at the anti-reverse structure. Under the constraint of the anti-reverse structure, the free end of anti-reverse belt 30 will not detach from the anti-reverse structure. The portion of anti-reverse belt 30 near the rear frame 13 of the support frame 10 is curled up inside the accommodating space between the support frame 10 and the contour limiting structure. Anti-reverse belt 30 is in a slack state and will not affect the operation of conveyor belt 63 of belt conveyor 60. When belt conveyor 60 stops, the driving force for forward rotation disappears, and reverse rotation occurs. The lower belt of conveyor belt 63 moves from the tail end to the head end of belt conveyor 60, driving the free end of anti-reverse belt 30 and the anti-detachment structure to move towards the front roller 62 of belt conveyor 60. This pulls out the portion of anti-reverse belt 30 that is coiled inside the accommodating space between the support frame 10 and the contour limiting structure. The free end of anti-reverse belt 30 and the anti-detachment structure follow the movement of the lower belt of conveyor belt 63 and are wound between conveyor belt 63 and front roller 62. Since the fixed end of anti-reverse belt 30 is fixed to the rear frame 13, and the free end of anti-reverse belt 30 and the anti-detachment structure are clamped between conveyor belt 63 and front roller 62 by friction, anti-reverse belt 30 is in a taut state. Figure 5 As shown, the backstop force can be increased by pulling the backstop belt 30, preventing the belt conveyor 60 from continuing to rotate in the reverse direction, thus effectively protecting the belt conveyor 60.

[0033] This utility model's belt backstop device can be easily installed on belt conveyors that already have backstops to enhance the backstop torque, and can also be easily installed on belt conveyors that do not have backstops. It solves the problems of belt conveyors with backstops rotating in reverse due to insufficient backstop torque, and the inconvenience of installing backstops on belt conveyors that do not have backstops.

[0034] Specifically, the structure of the belt conveyor 60 is a well-known technology, and its specific structure will not be described in detail here.

[0035] In this utility model, the anti-detachment structure is a baffle 40 fixed to the free end of the anti-reverse belt 30, and the two ends of the baffle 40 extend beyond the side of the anti-reverse belt 30.

[0036] Specifically, the baffle 40 is preferably a flat steel plate, fixed to the lower side of the anti-backflow belt 30, that is, the side of the anti-backflow belt 30 corresponding to the lower belt body of the conveyor belt 63. This way, when the free end of the anti-backflow belt 30 and the flat steel plate are rolled between the conveyor belt 63 and the front roller 62, the flat steel plate will not contact the front roller 62, avoiding damage to the front roller 62. During installation, the conveyor belt 63 of the belt conveyor 60 is in a stationary state. Due to the relatively large weight of the flat steel plate, when the free end of the anti-backflow belt 30 and the flat steel plate are placed on the lower belt body of the conveyor belt 63, there is friction between the flat steel plate and the lower belt body of the conveyor belt 63, which can hold the free end of the anti-backflow belt 30 and the flat steel plate in their placed positions. In other words, during installation, the free end of the anti-backflow belt 30 and the flat steel plate can be directly placed at the anti-backflow structure. Of course, the baffle 40 can also be replaced with a plastic plate or an alloy plate, etc.

[0037] Correspondingly, such as Figure 1 and Figure 2 As shown, the anti-reverse structure includes a left limit seat 50a and a right limit seat 50b spaced apart on both sides of the lower belt body of the conveyor belt 63. Limiting latching parts are respectively provided at the two ends of the baffle 40 corresponding to the left limit seat 50a and the right limit seat 50b. The distance between the left limit seat 50a and the right limit seat 50b is greater than the width of the anti-reverse belt 30. Usually, the left limit seat 50a and the right limit seat 50b are fixed to the frame 61 of the belt conveyor 60. Of course, the left limit seat 50a and the right limit seat 50b can also be directly fixed to the support frame 10.

[0038] Specifically, the left limiting seat 50a and the right limiting seat 50b each include a vertical plate 51 and a right-angle plate 52 fixed to the side of the vertical plate 51. The right-angle plate 52 of the left limiting seat 50a and the right-angle plate 52 of the right limiting seat 50b are arranged adjacent to each other. One right-angle panel of the right-angle plate 52 is arranged horizontally forward, and the other right-angle panel is arranged vertically downward. The right-angle plate 52 forms a limiting engagement part. When the belt conveyor 60 rotates in the forward direction, the two ends of the baffle 40 are respectively engaged with the right-angle plate 52 on the corresponding side.

[0039] In some other embodiments, the anti-reverse structure may also be configured as follows: a long strip plate fixed above the lower belt body of the conveyor belt 63, with an elongated through hole for the anti-reverse belt 30 to pass through on the long strip plate. In this case, the length of the baffle 40 may be adapted to the width of the anti-reverse belt 30 or may be greater than the width of the anti-reverse belt 30.

[0040] In this utility model, the support frame 10 also includes a front frame 14 spaced apart from the rear frame 13, a left frame 11 fixed between the left side of the rear frame 13 and the left side of the front frame 14, and a right frame 12 fixed between the right side of the rear frame 13 and the right side of the front frame 14; the contour limiting structure is fixed between the rear frame 13 and the front frame 14.

[0041] Specifically, the contour limiting structure includes multiple support plates 20 spaced apart between the left frame 11 and the right frame 12, each support plate 20 being fixedly connected to the rear frame 13 and the front frame 14 respectively.

[0042] Furthermore, the support plate 20 includes a rear support plate 21 fixed to the rear frame 13, a front support plate 22 fixed to the front frame 14, and a connecting plate 23 connecting the upper end of the rear support plate 21 and the upper end of the front support plate 22. The height of the front support plate 22 is greater than the height of the rear support plate 21, and the connecting plate 23 and the rear support plate 21, and the connecting plate 23 and the front support plate 22 are provided with an arc-shaped transition connection, so that the anti-reverse strap 30 portion near the rear frame 13 of the support frame 10 can be rolled up inside the accommodating space. The anti-reverse strap 30 portion rolled up inside the accommodating space is attached to multiple support plates 20. Typically, the support plate 20 is a one-piece structure, formed by bending a long strip of plate.

[0043] In some other embodiments, the contour limiting structure may also be configured as a top cover structure, formed by folding a plate.

[0044] In this utility model, in order to facilitate fixing the fixed end of the anti-reverse strap 30 to the rear frame 13 of the support frame 10, a pressure plate 17 is provided at the rear frame 13, and at least two fastening connectors are provided between the pressure plate 17 and the rear frame 13. The fixed end of the anti-reverse strap 30 is clamped between the pressure plate 17 and the rear frame 13. Typically, the fastening connectors are bolt and nut assemblies.

[0045] Specifically, the fastening connectors are set one-to-one with the support plate 20, which can simultaneously fix the support plate 20 and the anti-reverse belt 30, making installation convenient.

[0046] In this utility model, the arc-shaped support structure 15 includes a mounting plate 151 and an arc-shaped transition plate 152 fixed to the upper side of the mounting plate 151. The mounting plate 151 is fixed to the rear frame 13.

[0047] Specifically, the mounting plate 151 is clamped between the pressure plate 17 and the rear frame 13, and the fixed end of the anti-reverse strap 30 is clamped between the pressure plate 17 and the mounting plate 151.

[0048] Furthermore, a cylindrical shaft 16 is provided at the front of the curved support structure 15, and the anti-reverse band 30 passes around the curved support structure 15 and the cylindrical shaft 16 in sequence. Typically, the cylindrical shaft 16 is fixed between the left frame 11 and the right frame 12. The cylindrical shaft 16 provides support and guides the anti-reverse band 30 as it retracts into the accommodating space between the support frame 10 and the contour limiting structure, allowing the anti-reverse band 30 to retract more smoothly into the accommodating space between the support frame 10 and the contour limiting structure.

[0049] In this invention, to prevent the free end of the anti-reverse belt 30 and the anti-detachment structure from getting caught between the upper belt body and the front roller 62 of the conveyor belt 63 when the conveyor belt 63 of the belt conveyor 60 rotates in the forward direction, a limiting plate 70 is fixed on the front side of the support frame 10. The distance between the limiting plate 70 and the front roller 62 of the belt conveyor 60 is less than the thickness of the anti-reverse belt 30 and the anti-detachment structure.

[0050] Specifically, the limiting plate 70 is fixed to the front frame 14 by welding, bolts and nuts, etc.

[0051] like Figures 3 to 5 As shown, this utility model also discloses a belt conveyor 60, including a frame 61, a front roller 62 and a rear roller (not shown in the figure) respectively rotatably mounted on the frame 61, and a conveyor belt 63 surrounding the front roller 62 and the rear roller. It also includes the aforementioned belt backstop device, which is disposed between the upper and lower belt bodies of the conveyor belt 63 and is located near the front roller 62 of the belt conveyor 60. The support frame 10 of the belt backstop device is fixedly connected to the frame 61 of the belt conveyor 60. The backstop structure is disposed on the upper side of the lower belt body of the conveyor belt 63. The free end of the backstop belt 30 and the anti-detachment structure are located at the backstop structure.

[0052] When the belt conveyor 60 stops, the driving force for forward rotation disappears, and reverse rotation occurs. The lower belt of the conveyor belt 63 moves from the tail to the head of the belt conveyor 60, which can drive the free end of the anti-reverse belt 30 and the anti-detachment structure to move towards the front roller 62 of the belt conveyor 60. This pulls out the portion of the anti-reverse belt 30 that is coiled up in the accommodating space between the support frame 10 and the contour limiting structure. The free end of the anti-reverse belt 30 and the anti-detachment structure follow the movement of the lower belt of the conveyor belt 63 and are wound into the space between the conveyor belt 63 and the front roller 62. Since the fixed end of the anti-reverse belt 30 is fixed to the rear frame 13, and the free end of the anti-reverse belt 30 and the anti-detachment structure are held between the conveyor belt 63 and the front roller 62 by friction, the anti-reverse belt 30 is in a taut state. The pulling of the anti-reverse belt 30 can increase the anti-reverse force and prevent the belt conveyor 60 from continuing to rotate in reverse, effectively protecting the belt conveyor 60.

[0053] The above description is only some embodiments of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. A belt-type backstop device, applied to a belt conveyor, characterized in that, The belt-type backstop device includes a support frame, an arc-shaped support structure fixed to the front side of the rear frame of the support frame, a backstop structure fixed below the support frame, and a contour limiting structure fixed above the support frame. An accommodating space is formed between the support frame and the contour limiting structure. It also includes a backstop belt, the fixed end of which is fixed to the rear frame of the support frame. The backstop belt passes over the arc-shaped support structure and extends downward through the support frame. An anti-detachment structure is fixed at the free end of the backstop belt to prevent it from detaching from the backstop structure when the free end of the backstop belt moves backward.

2. The belt-type backstop device according to claim 1, characterized in that, The anti-detachment structure is a baffle fixed to the free end of the anti-reverse belt, and the two ends of the baffle extend beyond the side of the anti-reverse belt.

3. The belt-type backstop device according to claim 2, characterized in that, The anti-reverse structure includes a left limiting seat and a right limiting seat spaced apart on both sides of the lower belt of the conveyor belt of the belt conveyor. The left limiting seat and the right limiting seat are respectively provided with limiting locking parts at the two ends of the baffle. The distance between the left limiting seat and the right limiting seat is greater than the width of the anti-reverse belt.

4. The belt-type backstop device according to claim 1, characterized in that, A cylindrical shaft is provided at the front side of the arc-shaped support structure, which is fixed between the left frame and the right frame of the support frame. The anti-reverse band passes around the arc-shaped support structure and the cylindrical shaft in sequence.

5. The belt-type backstop device according to claim 1, characterized in that, A limit plate is fixed on the front side of the support frame.

6. The belt-type backstop device according to any one of claims 1 to 5, characterized in that, The contour limiting structure includes multiple support plates spaced apart between the left frame and the right frame of the support frame, each support plate being fixedly connected to the rear frame and the front frame of the support frame.

7. The belt-type backstop device according to claim 6, characterized in that, The support plate includes a rear support plate fixed to the rear frame, a front support plate fixed to the front frame, and a connecting plate connecting the upper end of the rear support plate and the upper end of the front support plate. The height of the front support plate is greater than the height of the rear support plate, and the connecting plate and the rear support plate, as well as the connecting plate and the front support plate, are provided with an arc-shaped transition connection.

8. The belt-type backstop device according to claim 6, characterized in that, A pressure plate is provided at the rear frame, and at least two fastening connectors are provided between the pressure plate and the rear frame. The fixed end of the anti-reverse strap is clamped between the pressure plate and the rear frame.

9. The belt-type backstop device according to claim 8, characterized in that, The arc-shaped support structure includes a mounting plate and an arc-shaped transition plate fixed to the upper side of the mounting plate. The mounting plate is clamped between the pressure plate and the rear frame. The fixed end of the anti-reverse belt is clamped between the pressure plate and the mounting plate.

10. A belt conveyor, comprising a frame, a front roller and a rear roller respectively rotatably mounted on the frame, and a conveyor belt surrounding the front roller and the rear roller, characterized in that, It also includes a belt backstop device as described in any one of claims 1 to 9, wherein the belt backstop device is disposed between the upper belt body and the lower belt body of the conveyor belt and is disposed near the front roller, the support frame is fixedly connected to the frame, the backstop structure is disposed on the upper side of the lower belt body of the conveyor belt, and the free end of the backstop belt and the anti-detachment structure are located at the backstop structure.

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