A lifting adjustable material limiting gate device for a tubular belt conveyor

Abstract

This utility model relates to an adjustable lifting limiting gate device for a tubular belt conveyor, comprising a handwheel, a worm gear mechanism, a connecting shaft, a transmission gear pair, a transmission screw, a nut slider, and a gate. The handwheel's output end is equipped with a handwheel shaft, which is connected to the worm. The worm is horizontally arranged and meshes with a worm wheel. The worm wheel is fixed to one end of the horizontally arranged connecting shaft, and the axis of the worm wheel coincides with the axis of the connecting shaft. The connecting shaft is horizontally arranged, and a driving synchronous gear is provided at its end for transmitting power to two parallel transmission components. Two vertically arranged screws are each equipped with a driven synchronous gear, which meshes with the driving synchronous gear. The two driven synchronous gears have identical modules, number of teeth, and tooth directions. The lower part of the two screws has a trapezoidal thread structure. The inner hole of the nut slider has a thread matching the trapezoidal thread of the screw. The nut slider is connected to the gate.

Description

Technical Field

[0001] This utility model relates to the field of tubular belt conveyor technology, and more particularly to a lifting adjustable limiting gate device for tubular belt conveyors. Background Technology

[0002] Tubular belt conveyors are advanced and efficient material handling equipment with numerous advantages such as large conveying capacity, low energy consumption, high flexibility, and environmental friendliness, and have been widely used in modern industrial production. The development of tubular belt conveyors can be traced back to the 1960s. Through years of research and practice, their technical performance has been continuously improved and optimized. Currently, they are widely used in ports, mines, power plants, coal mines, chemical plants, environmental protection, and other industries. During conveyor use, problems such as uneven material feeding, instantaneous overload, and excessively large material particles are frequently encountered. Conventional limit gates are adjusted using two handwheels. Due to the dual-manual structure, synchronization is required during adjustment, resulting in poor adjustment accuracy and precision, wasting labor and time, extremely low efficiency, and significant risks. Furthermore, this severely impacts the service life of the belt conveyor and is detrimental to operator use. Utility Model Content

[0003] In response to the aforementioned technical problems, a lifting adjustable limiting gate device for a tubular belt conveyor is provided.

[0004] The technical means adopted in this utility model are as follows:

[0005] A lifting adjustable limiting gate device for a tubular belt conveyor includes a handwheel, a worm gear mechanism, a connecting rod shaft, a transmission gear pair, a transmission lead screw, a nut slider, and a gate. The handwheel's output end is equipped with a handwheel shaft, which is connected to the worm gear. The worm gear is horizontally arranged and meshes with a worm wheel. The worm wheel is fixed to one end of the horizontally arranged connecting rod shaft, and the axis of the worm wheel coincides with the axis of the connecting rod shaft. The connecting rod shaft is horizontally arranged, and a driving synchronizing gear is provided at its end for transmitting power to two parallel transmission components. Two vertically arranged lead screws are each equipped with a driven synchronizing gear, which meshes with the driving synchronizing gear. The two driven synchronizing gears have identical modules, number of teeth, and tooth directions. The lower part of the two lead screws has a trapezoidal thread structure. The inner hole of the nut slider has a thread matching the trapezoidal thread of the lead screw. The nut slider is connected to the gate.

[0006] Furthermore, the connection between the nut slider and the gate is achieved by a universal joint, ball joint, or a pin structure with a cotter pin.

[0007] Furthermore, the handwheel output shaft is a horizontally arranged stepped shaft, with both ends fixed to bearing seats by deep groove ball bearings.

[0008] Furthermore, the bottom of the gate is an arc-shaped structure, and on both sides of the arc are inclined structures adapted to the stop rollers. Wear-resistant liners are provided on both the arc-shaped and inclined structures.

[0009] Furthermore, a U-shaped baffle is installed on the material receiving surface of the gate. The U-shaped baffle is located at the center of the gate and protrudes beyond the material receiving surface of the gate by a predetermined length.

[0010] Compared with existing technologies, this utility model has the following advantages: The gate drive device of this utility model adopts worm gear transmission, utilizing its self-locking characteristics, combined with the auxiliary self-locking of the screw and nut pair, to ensure that the gate will not fall after being suspended, guaranteeing the normal use of the gate during operation and effectively solving potential problems such as material overload and large particle passage. Its functions are significant, effectively solving problems such as tube expansion and torsion, thereby extending the service life of the conveyor belt. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the main view structure of this utility model.

[0013] Figure 2 This is a top view structural diagram of the present invention.

[0014] Figure 3 This is a schematic diagram of the worm gear structure of this utility model.

[0015] In the diagram: 1. Worm gear mechanism; 2. Gate plate; 3. Connecting rod shaft; 4. Handwheel; 5. Crossbeam one; 6. Nut slider; 7. Pin shaft; 8. Cotter pin; 9. Crossbeam two; 10. Bracket; 11. Pressure roller; 12. Stop roller; 13. Wear-resistant liner; 14. U-shaped baffle plate. Detailed Implementation

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0020] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] like Figures 1-3 As shown in the figure, this utility model discloses a lifting adjustable limiting gate device for a tubular belt conveyor, including a handwheel 4, a worm gear mechanism 1, a connecting rod shaft 3, a transmission gear pair, a transmission screw, a nut slider, and a gate. The output end of the handwheel is provided with a handwheel shaft, which is connected to the worm. The worm is horizontally arranged and meshes with a worm wheel. The worm wheel is fixed to one end of the horizontally arranged connecting rod shaft, and the axis of the worm wheel coincides with the axis of the connecting rod shaft. The connecting rod shaft is horizontally arranged, and active synchronizing gears are provided at both ends to transmit power to two parallel transmission components. The worm wheel is located in the middle of the synchronizing gear. The driving synchronous gears at the same end of the shaft are arranged sequentially in the axial direction. That is, from the shaft end to the middle of the shaft, the driving synchronous gear is installed first, followed by the worm gear. The two are fixed on the intermediate synchronous shaft by means of key connection, etc., and a certain distance is left between them to avoid mutual interference. Both vertically set lead screws are equipped with driven synchronous gears. The driven synchronous gears mesh with the driving synchronous gears. The two driven synchronous gears have the same module, number of teeth, and tooth direction. The lower part of the two lead screws has a trapezoidal thread structure. The inner hole of the nut slider 6 is provided with a thread that matches the trapezoidal thread of the lead screw. The nut slider is connected to the gate plate 2.

[0024] As an optional implementation, a set of bearings is provided at each end of the connecting rod shaft, with the bearings located on the side away from the worm gear. The bearings are mounted in bearing housings, which can be directly mounted above the bearing housing of the lead screw. These bearing housings can be extended to accommodate the bearings on one side and integrate the space for the drive synchronizing gear, worm gear, and lead screw on the other side. The extended bearing housing is then mounted above the bearing housing of the lead screw.

[0025] Of course, as an optional implementation, a guide assembly may also be included, which includes at least two guide rods that pass through guide holes on the nut slider to limit the rotational freedom of the nut slider and ensure that it can only move up and down along the axial direction.

[0026] In actual use, manually rotating the handwheel drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel in turn drives the synchronous intermediate shaft, which in turn drives the driving synchronous gears on both sides, causing the two lead screws to rotate synchronously in the same direction. As the lead screws rotate, the nut slider moves along the lead screw axis, raising and lowering the gate. Under normal working conditions, the gate remains in one position. Generally, the handwheel is reversed during maintenance to raise the gate to a position convenient for disassembly.

[0027] This utility model addresses a tubular belt conveyor feed line. The gate is primarily used to control the material feed rate, block the conveyor, or perform an emergency stop. It is installed at the feed inlet transition section and / or the discharge outlet unfolding section of the conveyor, i.e., the flat section where the conveyor belt is not rolled into a tubular shape, and needs to work in conjunction with the flat section of the conveyor belt. The gate needs to be fixed to the main frame of the conveyor via a bracket 10. In this embodiment, to install the limiting gate device, at least two crossbeams, one (5) and two (9), are installed on the frame. In this embodiment, crossbeam one (5) serves as the mounting structure for the bearing seat of the transmission screw, and a pressure roller 11 is installed on crossbeam two (9). A stop roller 12 is installed on the frame. The stop roller 12 is mounted on the frame via a stop roller bracket, which can be fixed to the frame by welding, bolting, or other methods. A bearing is installed in the bearing seat of the transmission screw.

[0028] The pressure rollers prevent material leakage caused by the conveyor belt edges curling up. The pressure roller brackets are welded or bolted to the conveyor frame, ensuring perpendicularity. The guide rollers prevent the conveyor belt from veering off course during operation, guiding it to maintain the correct trajectory by contacting the belt edges. The guide rollers provide lateral restraint to the conveyor belt from both sides, preventing deviation due to material impact or uneven tension. When material shifts to either side due to vibration or impact during transport, the guide rollers first limit the belt's deviation, and then the gate pushes the material back to the center of the conveyor belt, creating a lateral limit and preventing material spillage from the sides.

[0029] That is, the guide rollers laterally constrain the conveyor belt from both sides to prevent the conveyor belt from deviating. The gate and the guide rollers work together to form a lateral limiting combination, pushing the material that has deviated to the sides back to the center area of ​​the conveyor belt, preventing the material from spilling from the side. The guide rollers guide the direction of the conveyor belt, and the gate and the guide rollers work together to form a constraint channel, restricting the boundary of the material in the channel and preventing the material from rushing out of the range controlled by the guide rollers, thus achieving effective limiting of the material.

[0030] In the working state of the gate, at its lowest extreme position, a gap of at least 1-2 mm must be reserved to avoid direct pressure on the conveyor belt and causing wear. The bottom of the gate has an arc-shaped structure, and on both sides of the arc are inclined structures adapted to the guide rollers. Wear-resistant liners 13 are provided on both the arc-shaped and inclined structures. In this embodiment, the wear-resistant liners are polyurethane liners, which lightly press on the surface of the conveyor belt when closed.

[0031] Furthermore, the connection between the nut slider and the gate is achieved by a universal joint, ball joint, or pin 7 structure that works with the cotter pin 8. This embodiment uses the latter for illustration.

[0032] Specifically, the connection between the nut slider and the gate is a rigid connection. Two symmetrically arranged connecting lugs are welded to the top of the gate. The connecting lugs are hinged to the protruding end of the nut slider by a pin.

[0033] Alternatively, the connection between the nut slider and the gate is a flexible connection, with a universal joint or ball joint installed on the top of the nut slider, and the universal joint or ball joint connected to the gate via a tie rod, with self-aligning bearings at both ends of the tie rod.

[0034] The connection method between the gate and the nut slider can be selected as rigid or flexible connection according to the actual gate weight and working conditions on site, ensuring the stability and applicability of the connection.

[0035] Furthermore, the handwheel output shaft is a horizontally arranged stepped shaft, with both ends fixed to bearing housings by deep groove ball bearings. The bearing housings can be extensions of the aforementioned connecting rod shaft.

[0036] Furthermore, a U-shaped baffle plate 14 is installed on the material receiving surface of the gate. The U-shaped baffle plate is located at the center of the gate and protrudes beyond the material receiving surface of the gate by a predetermined length.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting adjustable material limiting gate device for a tubular belt conveyor, characterized in that, The device includes a handwheel, a worm gear mechanism, a connecting rod shaft, a transmission gear pair, a lead screw, a nut slider, and a gate. The handwheel's output end is equipped with a handwheel shaft, which is connected to the worm. The worm is horizontally arranged and meshes with a worm wheel, which is fixed to one end of the horizontally arranged connecting rod shaft. The axis of the worm wheel coincides with the axis of the connecting rod shaft. The connecting rod shaft is horizontally arranged and has a driving synchronizing gear at its end for transmitting power to two parallel transmission components. Two vertically arranged lead screws are each equipped with a driven synchronizing gear, which meshes with the driving synchronizing gear. The two driven synchronizing gears have identical modules, number of teeth, and tooth directions. The lower part of both lead screws has a trapezoidal thread structure. The inner hole of the nut slider has a thread matching the trapezoidal thread of the lead screw. The nut slider is connected to the gate.

2. The material limiting gate device according to claim 1, characterized in that, The connection between the nut slider and the gate is achieved by a universal joint, ball joint, or a pin structure with a cotter pin.

3. The material limiting gate device according to claim 1, characterized in that, The handwheel output shaft is a horizontally arranged stepped shaft, with both ends fixed to bearing seats by deep groove ball bearings.

4. The material limiting gate device according to claim 1, characterized in that, The bottom of the gate is an arc-shaped structure, and on both sides of the arc are inclined structures adapted to the stop rollers. Wear-resistant liners are provided on both the arc-shaped and inclined structures.

5. The material limiting gate device according to claim 1, characterized in that, A U-shaped baffle is installed on the material receiving surface of the gate. The U-shaped baffle is located at the center of the gate and protrudes beyond the material receiving surface of the gate by a predetermined length.

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