Slope-changing belt-clamping-preventing device of belt conveyor
By using transverse idlers with height adjustment devices and electric telescopic cylinders on the belt conveyor, the wear and entrapment problems at slope changes of the belt conveyor are solved, achieving smooth belt transition and dynamic adaptation, and improving the operational stability and economy of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU SONGYANG COAL MASCH MFG CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-15
AI Technical Summary
Existing belt conveyors are prone to wear and tear at slope changes, and the adjustment operation is inconvenient and has a limited range, resulting in unstable equipment operation and high maintenance costs.
It adopts lateral idlers with height adjustment devices and electric telescopic cylinders, and works in conjunction with slope angle adjustment. The angle of the lateral idlers is dynamically adjusted by the electric telescopic cylinder to adapt to slope changes at the slope point, eliminate the clamping gap, and reduce stress concentration.
This achieves a smooth transition of the belt at slope changes, extends belt life, reduces the risk of serious accidents, and improves the reliability and economy of equipment operation.
Smart Images
Figure CN224241904U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of belt conveyor technology, specifically to a belt conveyor slope anti-pinch device. Background Technology
[0002] During the operation of belt conveyors, the belt conveyor experiences significant compression at the inflection points (turning points) due to the traditional fixed-angle idler bracket design. Under heavy loads, this can lead to wear, tearing, and even complete failure of the belt, requiring frequent maintenance and replacement, increasing downtime and maintenance costs. Furthermore, the fixed-angle idler layout results in an excessively large angle between the belt and the alignment rollers, making it easy for the belt edge to become embedded in the gap between the support rollers and the alignment rollers, causing serious accidents such as belt jamming and tearing, severely impacting the safety and continuity of equipment operation.
[0003] A patent document with publication number CN114030817A, known to the inventor, discloses a belt conveyor support for smooth operation. By loosening the stabilizing bolt and turning the handle, a bidirectional threaded rod is rotated, causing a non-circular connecting plate threaded to the bidirectional threaded rod to move horizontally along a guide rod and link with a movable support. The movable support acts on a transfer plate through a second fixed rod, causing the transfer plate to rotate around the first fixed rod, thereby adjusting the tilt angle of the tilting idler. After adjustment, the stabilizing bolt is tightened to fix the position of the movable support. This achieves the effect of smooth transition of the belt at the slope change point, avoiding belt compression at the angle between adjacent idlers, thus solving the problem of belt breakage and extending the belt's service life.
[0004] However, in the process of implementing the technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems: Firstly, the adjustment operation of this solution relies on manual operation, and the angle adjustment is achieved by rotating the bidirectional threaded rod with a crank handle. In scenarios where frequent adjustments are required, manual operation is inefficient and may increase maintenance costs. Secondly, its adjustment range is limited by the horizontal movement of the irregular connecting plate and the rotation angle of the adapter plate. Under extreme slope conditions, the angle adjustment range is limited and it is difficult to adapt to complex terrain requirements. In addition, the installation and maintenance of this device are complex. Multiple rotating and sliding parts in the structure (such as adapter plates, guide rods, bearings, etc.) require precise alignment during installation, and subsequent maintenance requires checking the cooperation status of multiple parts, increasing the difficulty of operation.
[0005] In summary, existing belt conveyors suffer from drawbacks such as inconvenient manual adjustment, limited adjustment range, and insufficient dynamic adaptability. Furthermore, some complex structures lead to high installation and maintenance costs. They still cannot effectively solve the core problems of belt stress concentration and the risk of belt entrapment at slope change points. There is an urgent need for an anti-entrapment device that can flexibly adapt to changes in slope at slope change points and reduce belt breakage and the risk of belt entrapment, so as to improve the reliability and economy of belt conveyor operation.
[0006] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention
[0007] In view of at least one of the above technical problems, this disclosure provides a belt conveyor slope-changing anti-pinch device, which guides the belt to smoothly transition and reduces the belt bending angle by using a transverse idler roller with a height adjustment device in conjunction with the slope angle. At the same time, the angle of the side idler roller is dynamically adjusted by an electric telescopic cylinder to adapt to the slope change at the slope point, reduce stress concentration, eliminate belt pinch gap, reduce the risk of serious accidents, and solve the defects of the prior art such as inconvenient manual adjustment operation, limited adjustment range, and insufficient dynamic adaptability.
[0008] According to one aspect of this disclosure, a belt conveyor slope anti-pinch device is provided, which includes a main support and idler modules fixedly connected to the main support; the idler modules include a first idler module and a second idler module symmetrical about the center of the main support, and a transverse idler module disposed at the middle position of the main support;
[0009] The first idler module or the second idler module includes a fixed base, a telescopic cylinder fixed on the fixed base, a sliding plate fixed on the telescopic cylinder with a horizontal groove on the top, a first idler and a second idler with one end slidably fitted into the groove via an inner bracket, and the other ends of the first idler and the second idler are respectively connected to an outer bracket via hinges. The outer bracket of the first idler is higher than the outer bracket of the second idler, and the outer bracket is fixedly connected to the main bracket.
[0010] The transverse idler module includes a transverse idler bracket connected to the main bracket via a telescopic cylinder, and a transverse idler connected to the transverse idler bracket.
[0011] Furthermore, it also includes guide columns vertically mounted on the main support, the guide columns passing through the middle of the sliding plates, and each sliding plate having at least one guide column.
[0012] Furthermore, in the same idler module, a limiting post is provided below the inner support of the first idler and the second idler, and the limiting post is fitted into two different sliding grooves of the same sliding plate.
[0013] Furthermore, at the lowest position of the sliding plate, the inner supports of the first and second idlers are at an angle to the vertical direction.
[0014] Furthermore, it also includes a control device for controlling the movement of the telescopic cylinder.
[0015] Furthermore, the intersection point formed by the symmetrical plane of the transverse idler and the main support is higher than the intersection point formed by the symmetrical plane of the second idler and the main support.
[0016] One or more technical solutions provided in the embodiments of this application have at least one of the following technical effects or advantages:
[0017] 1. The use of transverse idlers with height adjustment devices not only supports the weight of the belt and maintains its running trajectory, but also effectively solves the technical problem of belt breakage at slope changes in the prior art. This achieves the effect of guiding the belt to a smooth transition in accordance with the slope angle, thus extending the belt's lifespan.
[0018] 2. By installing an electric telescopic cylinder under the inner support of the inclined idler and a protective hinge on the outer support of the inclined idler, the defects of the existing technology, such as inconvenient manual adjustment, limited adjustment range, and insufficient dynamic adaptability, are effectively solved. This achieves the effect of dynamically adapting to the slope change at the slope change point, eliminating belt clamping gap, and reducing stress concentration and the risk of serious accidents.
[0019] 3. By connecting the bottom ends of the inner supports of the same set of inclined supports, the problem of inconsistent roller angle adjustment in the prior art is effectively solved, thereby realizing quick adjustment of the entire device.
[0020] 4. By designing the inward tilt angle of the inner support of the inclined bracket and limiting the opening of the sliding tray, the problem of the bracket easily getting stuck at the dead point when adjusting the roller angle is effectively solved, thereby achieving the effect of smooth adjustment of the roller bracket height and improving the reliability of the device. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of the belt conveyor slope anti-pinch device in one embodiment of this application.
[0022] Figure 2 This is a partial structural schematic diagram of the belt conveyor slope anti-pinch device in one embodiment of this application.
[0023] Figure 3 This is a schematic diagram of the transverse idler structure of the belt conveyor slope anti-pinch device in one embodiment of this application.
[0024] In the above figures, 1 is the main support, 11 is the main body of the support, 12 is the outer base plate, 13 is the inner base plate, 2 is the first idler module, 21 is the outer idler group, 211 is the outer idler support, 2111 is the outer support frame, 2112 is the outer movable frame, 2113 is the outer hinge, 2114 is the outer connecting support, 212 is the outer idler, 22 is the inner idler group, 221 is the inner idler support, 2211 is the inner support frame, 2212 is the inner movable frame, 2213 is the inner hinge, 2214 is the inner connecting support, 222 is the inner idler, 23 is the middle support, 231 is the middle support frame, 232 is the hollow slide plate, 233 is the electric telescopic cylinder, and 234 is the guide column. 3 is the second idler module, 4 is the transverse idler module, 41 is the transverse idler bracket, 411 is the base plate, 412 is the side bracket, 413 is the electric telescopic cylinder, and 42 is the transverse idler. Detailed Implementation
[0025] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," "horizontal," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., used in this application are used to distinguish the described objects and do not have any sequential or technical meaning. And the terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages).
[0026] Unless otherwise specified, the unit modules (components, structures, mechanisms) or sensors involved in the following embodiments are all conventional commercially available products.
[0027] This application provides a belt conveyor slope change anti-pinch device, which solves the problems of belt wear, tearing, or even scrapping at slope change points in the prior art. The idea of smooth belt transition at slope change points, eliminating belt pinching gaps, and reducing stress concentration is achieved by using a transverse idler roller with a height adjustment device.
[0028] The technical solution in this application is to solve the above problems, and the overall approach is as follows:
[0029] The transverse idler roller with height adjustment device allows the idler roller to match the slope angle, guiding the belt to transition smoothly. By installing an electric telescopic cylinder under the inner support of the inclined idler roller and a protective hinge on the outer support of the inclined idler roller, the side idler roller can dynamically adapt to the slope change at the slope point, eliminating belt clamping gaps. The inward tilt angle design of the inner support of the inclined support and the limiting of the sliding plate opening allow for smooth adjustment of the idler roller support height.
[0030] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] Example 1
[0032] Structural Description:
[0033] Combination Figures 1-3 As shown, the belt conveyor slope-changing anti-pinch device includes a main support 1 and three sets of idler roller modules located at corresponding positions on the main support 1. Their specific structures are as follows:
[0034] The main body of the support frame 11 is an angle steel that is placed on a cover. Both sides of the bottom are welded with outer bottom plates 12 for supporting the side roller modules. On the opposite side of the outer bottom plates 12, there are inner bottom plates 13 welded to the bottom of the main body of the support frame 11.
[0035] like Figure 2 As shown, the first idler module 2 includes an outer idler group 21 with a relatively large slope, an inner idler group 22 with a relatively small slope, and a central support 23 that provides support and slope adjustment between them.
[0036] The outer idler roller assembly 21 includes an outer idler roller bracket 211 and an outer idler roller 212. The outer support frame 2111 of the outer idler roller bracket 211 is vertically welded to the main bracket 1, with its inner side welded to the inclined surface of the bracket body 11 and its outer side welded to the upper surface of the outer bottom plate 12. This arrangement enhances the overall strength of the device. An outer hinge 2113, which serves as the central shaft for rotating the outer movable frame 2112, is welded to the upper end of the outer support frame 2111. The outer roller bracket 211 is connected to one side of the outer roller 212 via a bearing on the outer movable frame 2112. The other side of the outer roller 212 is also connected to the outer connecting bracket 2114 via a bearing. It is worth mentioning that when the device is at its lowest height, the outer connecting bracket 2114 has an angle of 5° between its vertical side and the vertical plane. It has a horizontal cylindrical limiting block at its lower part, which is close to the inner roller group 22, to prevent the outer connecting bracket 2114 from getting stuck at a dead point when the device is raised, thus preventing the device from failing.
[0037] The inner roller assembly 22 includes an inner roller bracket 221 and an inner roller 222. The inner support frame 2211 of the inner roller bracket 221 is vertically welded to the inclined surface of the main support body 11 in the main support 1. An inner hinge 2213, a central shaft for rotating the inner movable frame 2212, is welded to the upper end of the inner support frame 2211. The inner roller bracket 221 is connected to one side of the inner roller 222 via a bearing connected to the inner movable frame 2212. The other side of the inner roller 222 is also connected to the inner connecting bracket 2214 via a bearing. Notably, at the lowest point of the device height, the inner connecting bracket 2214 has a 5° angle between its relatively vertical side and the vertical plane. A transverse cylindrical limiting block is located at its lower part near the outer roller assembly 21 to prevent the inner connecting bracket 2214 from getting stuck at a dead point when the device is raised, thus preventing device failure.
[0038] The central support 23 is an adjustment device welded to the main support 1 for adjusting the angle of the first idler roller module 2. It is welded to the inclined surface of the support body 11 via a central support frame 231. A hollow slide plate 232 is provided above the central support frame 231, which is connected to the upper surface of the central support frame 231 via electric telescopic cylinders fixed at the lower parts on both sides. Guide columns 234 are also fixed on the upper surface of the central support frame 231. There are four guide columns 234 arranged in a rectangle, which are limited by a through hole in the middle of the hollow slide plate 232 to prevent the hollow slide plate 232 from tilting during height adjustment. The hollow slide plate 232 has movable grooves in the corresponding range of motion of the outer connecting bracket 2114 and the inner connecting bracket 2214. When the device is in the lowest position, it can restrict the vertical posture of the outer connecting bracket 2114 and the inner connecting bracket 2214 to prevent the device from failing due to being stuck at a dead point. An electric telescopic cylinder is installed below the inner support of the inclined idler, and a protective hinge is installed on the outer support of the inclined idler. This achieves the effect of dynamically adapting to the slope changes at the slope change point, eliminating belt clamping gaps, and realizing the technical effect of reducing stress concentration and reducing the risk of serious accidents.
[0039] The second idler module 3 is symmetrical to the first idler module 2 with respect to the main support 1, that is, it is located on the other side of the main support 1, and all the components are connected in the same way.
[0040] The transverse idler module 4 is located at the front of the device, blocking the bottom angle formed by the inner idlers of the second idler module 3 and the first idler module 2, and forming new, larger angles with them to guide the belt through a smooth transition. It includes a transverse idler bracket 41 and a transverse idler 42. Below the transverse idler bracket 41 are two electric telescopic cylinders 413, respectively mounted on the inner base plates 13 on both sides of the main bracket 1. The two electric telescopic cylinders are connected together and lift the base plate 411. Side brackets 412 are welded to both sides of the base plate 411, and both side brackets 412 are connected to the transverse idler 42 through bearings installed at the openings. The transverse idler with a height adjustment device supports the weight of the belt, maintains the running trajectory, and thus achieves the effect of coordinating with the changing slope angle to guide the belt through a smooth transition, thereby extending the belt's lifespan.
[0041] Workflow:
[0042] When the device is in its initial position, all electric telescopic cylinders are at their lowest point. At this time, the upper surface of the belt support formed by the various idlers is concave and deeply sunken. When the equipment is running, the electric telescopic cylinders are activated. All electric telescopic cylinders in this device are controlled by the same remote control and rise simultaneously, lifting the inner supports of the side idlers and the transverse idlers, thus reducing the depth of the concavity of the upper surface of the belt support formed by the various idlers. Different extension amounts of the electric telescopic cylinders are used when facing different slope angles, thereby achieving the effect of dynamically adapting to changes in slope at the slope point.
[0043] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0044] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from the spirit and scope of its inventive concept. Therefore, if such modifications and variations to this disclosure fall within the scope of the claims of this application and their equivalents, this utility model also intends to include such modifications and variations.
Claims
1. A belt conveyor slope-adjustable anti-pinch device, characterized in that, It includes a main support frame and roller modules that are fixedly connected to the main support frame; the roller modules include a first roller module and a second roller module that are symmetrical about the center of the main support frame, and a transverse roller module located at the middle position of the main support frame; The first idler module or the second idler module includes a fixed base, a telescopic cylinder fixed on the fixed base, a sliding plate fixed on the telescopic cylinder with a horizontal groove on the top, a first idler and a second idler with one end slidably fitted into the groove via an inner bracket, and the other ends of the first idler and the second idler are respectively connected to an outer bracket via hinges. The outer bracket of the first idler is higher than the outer bracket of the second idler, and the outer bracket is fixedly connected to the main bracket. The transverse idler module includes a transverse idler bracket connected to the main bracket via a telescopic cylinder, and a transverse idler connected to the transverse idler bracket.
2. The belt conveyor slope anti-pinch device according to claim 1, characterized in that, It also includes guide columns that are vertically mounted on the main support, the guide columns passing through the middle of the sliding plates, and each sliding plate has at least one guide column.
3. The belt conveyor slope anti-pinch device according to claim 1, characterized in that, In the same idler module, the inner supports of the first idler and the second idler are provided with limiting posts, and the limiting posts are fitted into two different sliding grooves of the same sliding plate.
4. The belt conveyor slope anti-pinch device according to claim 1, characterized in that, At the lowest position of the sliding plate, the inner supports of the first and second idlers are at an angle to the vertical direction.
5. The belt conveyor slope anti-pinch device according to claim 1, characterized in that, It also includes a control device for controlling the movement of the telescopic cylinder.
6. The belt conveyor slope anti-pinch device according to claim 1, characterized in that, The intersection point formed by the symmetrical plane of the transverse idler and the main support is higher than the intersection point formed by the symmetrical plane of the second idler and the main support.