Tensioning device, belt conveyor and concrete mixing plant

Abstract

The utility model relates to a tensioning device, a belt conveyor and a concrete mixing plant, the tensioning device is installed at the tail of a rack of the conveyor, is used for adjusting the tensioning degree of a tail roller, and comprises slideways symmetrically and fixedly installed on the left side and the right side of the rack, sliding rods arranged in the slideways in a sliding mode, and a displacement adjusting device connected with the sliding rods and the slideways; the displacement adjusting device drives the sliding rod to move back and forth in the slideway; the tail roller is connected between the free ends of the two sliding rods; the belt conveyor is provided with the tensioning device; the concrete mixing plant comprises the belt conveyor. According to the tensioning device capable of reducing the length of the belt conveyor, the conveying length of the belt conveyor is shortened, the conveying space is saved, and transportation and loading of a concrete mixing plant are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of conveyor belt tensioning technology, and in particular to a tensioning device, a belt conveyor, and a concrete mixing plant. Background Technology

[0002] Short-distance conveyor belts generally use helical tensioning, which is economical and simple. The tail roller moves on a track; the length of the track must be determined by the tensioning stroke, which can impact applications with limited installation or transport space. For example, concrete mixing plants often use belt conveyors for metering and transporting aggregates. For export-oriented mixing plants requiring container transport, the belt conveyor is often assembled in the factory and shipped as a whole to shorten the installation period, thus limiting its overall length. For short conveyors less than 20 meters long, helical tensioning is generally used, eliminating the need for additional rollers or other devices; the tail roller typically doubles as the tensioning roller. Currently used helical tensioning systems, whether fixed or rearward-moving, require a track support at the tail of the conveyor with a length no less than the roller's tensioning stroke, resulting in a larger overall conveyor length, which is unfavorable for containerized transport.

[0003] Currently, there are two main types of screw tensioners: fixed screw type and rearward screw type. In the former, the nut on the screw is fixed to the base of the roller bearing seat. The rotation of the screw drives the roller to move, thereby tightening the belt. (See [link]). Figure 1 The latter method involves moving a screw to drive the roller bearing housing backward along a specific slide rail support; see [link to relevant documentation]. Figure 2 Both of these methods involve the tail roller moving on the slide support. The length of the slide must be determined by the designed tension stroke. When transporting the entire conveyor belt, it occupies a large space. Even when the tail roller moves to the front of the slide, the total length of the conveyor remains fixed. This is not conducive to the overall container transport of the conveyor or its installation in confined spaces.

[0004] Therefore, there is an urgent need for a tensioning device that can reduce the length of belt conveyors, thereby shortening the transport length of belt conveyors, saving transport space, and facilitating the transport and loading of concrete mixing plants. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a tensioning device that can reduce the length of the belt conveyor, thereby shortening the transport length of the belt conveyor, saving transport space, and facilitating the transport and loading of concrete mixing plants.

[0006] The purpose of this utility model is achieved as follows:

[0007] A tensioning device, installed at the tail end of a conveyor frame, is used to adjust the tension of the tail roller. It includes slide rails symmetrically fixed on the left and right sides of the frame, sliding rods slidably disposed within the slide rails, and a displacement adjusting device connecting the sliding rods and the slide rails. The displacement adjusting device drives the sliding rods to move back and forth within the slide rails. The tail roller is connected between the free ends of the two sliding rods.

[0008] Furthermore, the displacement adjusting device includes a baffle fixed on the slide rail, a nut fixed on the sliding rod, and a long bolt embedded in the through hole of the baffle and threadedly connected to the nut.

[0009] Furthermore, a friction-reducing component is provided between the sliding contact surface of the slide rail and the sliding rod to reduce friction.

[0010] Furthermore, the friction-reducing component is a round steel bar welded and installed on the inner wall of the slide.

[0011] Furthermore, a locking bolt for locking the position of the sliding rod is screwed onto the slide rail.

[0012] Furthermore, the free end of the sliding rod is fixedly fitted with a protective cover to protect the tail roller.

[0013] Furthermore, an oil filling nozzle is provided on the outside of the protective cover, and the oil filling nozzle is connected to the oil filling hole of the bearing seat of the tail roller through an oil pipe.

[0014] A belt conveyor, wherein any of the aforementioned tensioning devices is installed at the tail end of the belt conveyor frame.

[0015] A concrete mixing plant comprising the belt conveyor.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The tensioning device of this utility model adjusts the extension and retraction of the sliding rod at the tail of the conveyor frame through a displacement adjustment device. The tail roller of the conveyor is installed at the end of the sliding rod. By adjusting the extension and retraction of the sliding rod, the tail roller can move back and forth, thereby realizing the belt tensioning function. At the same time, the overall length of the conveyor can be adjusted.

[0018] The belt conveyor of this utility model has a tail roller positioned at the front and the tension and contraction can be adjusted by the above-mentioned tensioning device, which realizes the adjustment of the overall length of the belt conveyor and reduces the space occupation.

[0019] The concrete mixing plant of this utility model includes the aforementioned belt conveyor, the overall length of which is adjustable, so that the length of the belt conveyor can be shortened during transportation to meet the loading requirements. Attached Figure Description

[0020] Figure 1This is a schematic diagram of a tensioning device with a constant screw position in the prior art.

[0021] Figure 2 This is a schematic diagram of an existing screw-rear-moving tensioning device.

[0022] Figure 3 This is a schematic diagram of the tensioning device of this utility model.

[0023] Figure 4 This is a top view of a tensioning device according to the present invention.

[0024] Figure 5 This is a front view of a tensioning device according to the present invention.

[0025] Figure 6 This is a cross-sectional view along direction A of a tensioning device according to the present invention.

[0026] in:

[0027] Tail roller 1, sliding rod 2, slide rail 3, locking bolt 4, long bolt 5, baffle 6, nut 7, protective cover 8, oil pipe 9, oil filler nozzle 10, friction reducing component 11. Detailed Implementation

[0028] See Figures 3-6 This utility model relates to a tensioning device, which is installed at the tail end of the conveyor frame and is used to adjust the tension of the tail roller 1. It includes slide rails 3 symmetrically fixed on the left and right sides of the frame, sliding rods 2 slidably disposed in the slide rails 3, and a displacement adjustment device connecting the sliding rods 2 and the slide rails 3; the tail roller 1 is connected between the free ends of the two sliding rods 2.

[0029] The free end of the sliding rod 2 is fixedly equipped with a protective cover 8 to protect the tail roller 1. An oiling nozzle 10 is provided on the outside of the protective cover 8. The oiling nozzle 10 is connected to the oiling hole of the bearing seat of the tail roller 1 through an oil pipe 9 to ensure that the tail roller 1 works normally.

[0030] The displacement adjustment device drives the sliding rod 2 to move back and forth within the slide rail 3. It includes a baffle 6 fixed on the slide rail 3, a nut 7 fixed on the sliding rod 2, and a long bolt 5 embedded in the through hole of the baffle 6 and threadedly connected to the nut 7. When the long bolt 5 is rotated forward, the nut 7 moves closer to the baffle 6, causing the sliding rod 2 to extend outward, and consequently the tail roller 1 to extend outward, thus tensioning the belt. When the long bolt 5 is rotated in the opposite direction, the distance between the nut 7 and the baffle 6 increases, allowing the sliding rod 2 to retract inward, and consequently the tail roller 1 to retract inward, thus relaxing the belt. This also shortens the overall length of the belt conveyor and reduces space occupation.

[0031] To make the sliding rod 2 slide more smoothly in the slide rail 3, a friction-reducing component 11 is provided between the sliding contact surface of the slide rail 3 and the sliding rod 2 to reduce friction. In this embodiment, the friction-reducing component 11 is a round steel welded to the inner wall of the slide rail 3. A locking bolt 4 for locking the position of the sliding rod 2 is screwed on the slide rail 3 to facilitate locking the position of the tail roller 1 after tension adjustment.

[0032] This invention places the tail roller at the front of the frame and extends it outwards. The extension and retraction of the tail roller is adjusted by a displacement adjustment device to tighten or loosen the belt. At the same time, the overall length of the belt conveyor is adjustable, which reduces the overall space occupied by the belt conveyor and facilitates transportation. Example

[0033] This utility model relates to a belt conveyor, in which the tensioning device described in Embodiment 1 is installed at the tail of the belt conveyor frame. The tensioning device is used to adjust the belt tension and to make the overall length of the belt conveyor adjustable, thereby reducing space occupation. Example

[0034] The present invention relates to a concrete mixing plant, which includes the belt conveyor of Embodiment 2. When transportation is required, the length of the belt conveyor can be shortened to meet the loading requirements.

[0035] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A tensioning device, installed at the tail end of a conveyor frame, for adjusting the tension of the tail roller (1), characterized in that: It includes slide rails (3) symmetrically fixed on the left and right sides of the frame, sliding rods (2) slidably set in the slide rails (3), and displacement adjustment device connecting the sliding rods (2) and the slide rails (3); the displacement adjustment device drives the sliding rods (2) to move back and forth in the slide rails (3); the tail roller (1) is connected between the free ends of the two sliding rods (2).

2. The tensioning device according to claim 1, characterized in that: The displacement adjustment device includes a baffle (6) fixed on the slide rail (3), a nut (7) fixed on the sliding rod (2), and a long bolt (5) embedded in the through hole of the baffle (6) and threadedly connected to the nut (7).

3. The tensioning device according to claim 1, characterized in that: A friction-reducing component (11) is provided between the sliding contact surface of the slide rail (3) and the sliding rod (2) to reduce friction.

4. The tensioning device according to claim 3, characterized in that: The friction-reducing component (11) is a round steel bar welded and installed on the inner wall of the slide (3).

5. The tensioning device according to claim 1, characterized in that: A locking bolt (4) for locking the position of the sliding rod (2) is screwed onto the slide rail (3).

6. The tensioning device according to claim 1, characterized in that: The free end of the sliding rod (2) is fixed with a protective cover (8) to protect the tail roller (1).

7. The tensioning device according to claim 6, characterized in that: The protective cover (8) is provided with an oiling nozzle (10) on the outside. The oiling nozzle (10) is connected to the oiling hole of the bearing seat of the tail roller (1) through an oil pipe (9).

8. A belt conveyor, characterized in that: Install any of the tensioning devices described in claims 1 to 7 at the tail end of the frame of the belt conveyor.

9. A concrete mixing plant, characterized in that: The belt conveyor as described in claim 8.

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