Tension constant device of belt weigher

Abstract

The utility model relates to the technical field of belt weighers, in particular to a belt weigher tension constant device which comprises a belt weigher body, a plurality of fixed guide rollers are installed in the belt weigher body, a tension adjusting mechanism is arranged below the belt weigher body, and the tension adjusting mechanism comprises a supporting bottom box. The inner wall of the supporting bottom box is rotationally connected with a two-way threaded lead screw through a bearing, the outer surface of the supporting bottom box is fixedly connected with an adjusting driving motor, and the output end of the adjusting driving motor is connected with one end of the two-way threaded lead screw. Tension data of the conveying belt are collected in real time through the roller type tension sensor, if it is detected that the tension is uncomfortable, the controller immediately drives the adjusting driving motor, the threaded block is driven to move through the bidirectional threaded lead screw, the adjusting connecting rod pushes the mounting frame and the movable guide roller to ascend or descend, and therefore the tension of the conveying belt is adjusted; the tension is quickly supplemented or released, the tension fluctuation range is reduced, and the metering precision is stable.

Description

Technical Field

[0001] This application relates to the field of belt scale technology, and in particular to a belt scale tension constant device. Background Technology

[0002] A belt scale is an automatic weighing instrument that can continuously weigh bulk materials without interrupting the movement of the conveyor belt. It is mainly used in dynamic metering scenarios in industrial production, such as power, building materials, metallurgy, and mining. It outputs instantaneous flow rate and cumulative weight by detecting belt load and speed signals and performing integral calculations, replacing the traditional static batch weighing method. The metering accuracy of the belt scale during use is closely related to the stability of the belt tension, and the stability of the belt tension is one of the key factors affecting the metering accuracy of the belt scale.

[0003] In existing technologies, belt tension is usually adjusted by counterweights or tensioning screws. While counterweight tensioning devices can provide constant tension, they occupy a large space, have a slow response, and are inconvenient to adjust. Furthermore, during long-term operation, the conveyor belt is prone to tension slack or fluctuations due to factors such as heavy material load stretching and changes in ambient temperature, ultimately leading to weighing signal deviation. Moreover, traditional belt scales lack a real-time, precise tension adjustment structure, relying solely on periodically tightening bolts for adjustment. This not only lags behind tension changes but also easily leads to measurement deviations and decreased measurement accuracy due to uneven adjustment. Therefore, to solve the above problems, we provide a belt scale tension constant device. Utility Model Content

[0004] The purpose of this invention is to provide a belt scale tension constant device to solve the problems mentioned in the background art.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] A belt scale tension constant-pressure device includes a belt scale body with multiple fixed guide rollers installed inside. A tension adjustment mechanism is provided below the belt scale body. The tension adjustment mechanism includes a support base box. A bidirectional threaded screw is rotatably connected to the inner wall of the support base box via bearings. An adjustment drive motor is fixedly connected to the outer surface of the support base box, and the output end of the adjustment drive motor is connected to one end of the bidirectional threaded screw. Two threaded blocks are threadedly connected to the outer surface of the bidirectional threaded screw. The top end of each threaded block is located above the support base box. An adjustment connecting rod is hinged to the outer surface of each threaded block via a pin. A mounting frame is provided above the two adjustment connecting rods, and the top end of the adjustment connecting rod is hinged to the mounting frame via a pin. A movable guide roller is rotatably connected to the upper part of the inner wall of the mounting frame. Two fixed rods are fixedly connected to the inner wall of the support base box. Multiple sliding plates are fixedly connected to the outer surface of each fixed rod, and the outer surface of each sliding plate is fixedly connected to the outer surface of the threaded block.

[0007] Preferably, a support frame is fixedly connected to the bottom surface of the belt scale body, and the support frame is connected to the support base box.

[0008] Preferably, a controller is mounted on the front of the support frame, and a roller tension sensor is installed inside the main body of the belt scale. One of the guide rollers is located to the left of the roller tension sensor. The controller is electrically connected to the roller tension sensor and the regulating drive motor via wires.

[0009] Preferably, the moving guide roller is located between two fixed guide rollers, and multiple reinforcing rods are fixedly connected to the inner wall of each adjusting link.

[0010] Preferably, the upper surface of the support base box has two guide grooves, and each threaded block is slidably connected to the guide groove.

[0011] Preferably, the upper surface of the support base box is fixedly connected to two guide slides, and the outer surface of the mounting bracket is fixedly connected to two sliding protrusions, each of which is slidably connected to the guide slide.

[0012] Preferably, the outer surface of the belt scale body is provided with a through groove, which does not affect the movement of the mounting frame.

[0013] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0014] 1. This belt scale tension constant device collects conveyor belt tension data in real time through a roller tension sensor. If unsuitable tension is detected, the controller immediately drives the adjustment drive motor, which moves the threaded block through a bidirectional threaded screw. The adjusting linkage pushes the mounting frame and the moving guide roller to rise or fall, thereby adjusting the tension of the conveyor belt. This achieves rapid tension replenishment or release, realizing closed-loop control of detection, feedback, and adjustment, reducing tension fluctuation amplitude and stabilizing measurement accuracy.

[0015] Second, the tension constant device of this belt scale has high precision through the thread transmission of the bidirectional threaded screw. The movement distance of the threaded block can be precisely controlled by adjusting the speed of the drive motor, thereby accurately adjusting the lifting height of the moving guide roller to adapt to different degrees of tension relaxation. Moreover, the guide groove and guide slide ensure that the moving guide roller moves vertically during the adjustment process, avoiding uneven force on the conveyor belt. It is suitable for various working conditions that cause tension fluctuations, such as heavy load stretching and temperature changes, without the need to replace the adjustment parts, and is suitable for a variety of working conditions. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a frontal three-dimensional structural diagram of the belt scale tension constant device of this utility model;

[0018] Figure 2 This is a bottom-view three-dimensional structural diagram of the belt scale tension constant device of this utility model;

[0019] Figure 3 This is a cross-sectional view of the supporting base box in the belt scale tension constant device of this utility model;

[0020] Figure 4 This is a cross-sectional view of the belt scale tension constant device of this utility model;

[0021] Figure 5 This is a side view of the tension adjustment mechanism in the belt scale tension constant device of this utility model;

[0022] Figure 6 This is a side view of the tension-constant device for belt scales according to this utility model.

[0023] In the diagram: 1. Belt scale body; 2. Support frame; 3. Controller; 4. Roller tension sensor; 5. Fixed guide roller; 6. Tension adjustment mechanism; 61. Support base box; 62. Adjustment drive motor; 63. Bidirectional threaded screw; 64. Threaded block; 65. Adjustment connecting rod; 66. Mounting frame; 67. Moving guide roller; 7. Through groove; 8. Guide slide; 9. Sliding protrusion; 10. Fixed rod; 11. Sliding plate; 12. Guide groove; 13. Reinforcing rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0026] Please see Figures 1-6This utility model provides a belt scale tension constant device, including a belt scale body 1. Multiple guide rollers 5 are installed inside the belt scale body 1. A tension adjustment mechanism 6 is arranged below the belt scale body 1. The tension adjustment mechanism 6 includes a support base box 61. A bidirectional threaded screw 63 is rotatably connected to the inner wall of the support base box 61 via a bearing (not marked in the figure). An adjustment drive motor 62 is fixedly connected to the outer surface of the support base box 61, and the output end of the adjustment drive motor 62 is connected to one end of the bidirectional threaded screw 63. Two threaded blocks 64 are threadedly connected to the outer surface of the bidirectional threaded screw 63. The top of each threaded block 64 is located above the support base box 61. The outer surface of each threaded block 64 is connected by a pin (not shown in the figure, but those skilled in the art should understand the pin installation method and position). The conveyor belt is hinged with adjusting rods 65, and a mounting frame 66 is provided above the two adjusting rods 65. The top of the adjusting rods 65 is hinged to the mounting frame 66 by a pin. A moving guide roller 67 is rotatably connected to the upper part of the inner wall of the mounting frame 66. Two fixed rods 10 are fixedly connected to the inner wall of the support base box 61. Multiple sliding plates 11 are fixedly connected to the outer surface of each fixed rod 10. The outer surface of each sliding plate 11 is fixedly connected to the outer surface of the threaded block 64. Specifically, the bidirectional threaded screw 63 drives the threaded block 64 to move synchronously under the power of the adjusting drive motor 62. The adjusting rods 65 drive the moving guide roller 67 to move up and down. The conveyor belt tension can be quickly adjusted, which fundamentally solves the problem of tension slack that cannot be adjusted in real time. The fixed rods 10 and the sliding plates 11 ensure the stable movement of the threaded block 64 and avoid adjustment deviation.

[0027] In this embodiment, a support frame 2 is fixedly connected to the bottom surface of the belt scale body 1. The support frame 2 is connected to the support base box 61. A controller 3 is installed on the front of the support frame 2. A roller tension sensor 4 is installed inside the belt scale body 1. One of the fixed guide rollers 5 is located to the left of the roller tension sensor 4. The controller 3 is electrically connected to the roller tension sensor 4 and the adjustment drive motor 62 through wires. A moving guide roller 67 is located between two of the fixed guide rollers 5. Multiple reinforcing rods 13 are fixedly connected to the inner wall of each adjustment link 65. Specifically, the support frame 2 is connected to the belt scale body 1. The body 1 and the supporting base box 61 form an integrated and stable structure, which prevents the tension adjustment mechanism 6 from shifting due to vibration of the conveyor belt, ensuring adjustment accuracy. At the same time, the support frame 2 raises the equipment for easy maintenance from below. The controller 3 and the roller tension sensor 4 form a closed-loop control, which can respond to tension changes in real time without manual intervention and has high adjustment accuracy. The moving guide roller 67 is located between the two fixed guide rollers 5, which can maximize the use of the tensionable section of the conveyor belt. The reinforcing rod 13 enhances the bending strength of the adjusting link 65, prevents the adjusting link 65 from deforming under heavy load, and ensures the long-term reliability of the adjustment structure.

[0028] In this embodiment, two guide grooves 12 are formed on the upper surface of the support base box 61, and each threaded block 64 is slidably connected to the guide groove 12. Two guide slides 8 are fixedly connected to the upper surface of the support base box 61, and two sliding protrusions 9 are fixedly connected to the outer surface of the mounting bracket 66. Each sliding protrusion 9 is slidably connected to the guide slide 8. A through groove 7 is formed on the outer surface of the belt scale body 1. The through groove 7 does not affect the movement of the mounting bracket 66. Specifically, the guide groove 12 restricts the movement trajectory of the threaded block 64 to avoid lateral displacement of the threaded block 64 due to transmission clearance or long-term wear of the bidirectional threaded screw 63, ensuring the movement of the two threads. The threaded blocks 64 move synchronously closer or further away, the adjusting rod 65 is subjected to uniform force, and a flexible dustproof cloth can be set in the guide groove 12 to prevent dust and not affect the movement of the threaded blocks 64. The guide slide 8 cooperates with the sliding protrusion 9 to restrict the mounting frame 66 to move only in the vertical direction, to avoid the mounting frame 66 tilting during adjustment, and to ensure uniform tension in the width direction of the conveyor belt. The through groove 7 provides sufficient lifting space for the mounting frame 66 to avoid interference between the mounting frame 66 and the inner wall of the belt scale body 1 when the mounting frame 66 moves. When the moving guide roller 67 rises to the highest position, the top of the mounting frame 66 collides with the belt scale body 1 to ensure safety.

[0029] Working principle: First, the belt scale body 1 and the support base box 61 are fixed in the preset position of the conveying system by the support frame 2, ensuring that the axes of the fixed guide roller 5 and the moving guide roller 67 are parallel to avoid belt deviation. Check whether the through groove 7 is unobstructed and ensure that the lifting of the mounting frame 66 is free from interference. Connect the roller tension sensor 4 to the controller 3, and connect the adjustment drive motor 62 to the controller 3 through the wire to ensure normal signal transmission. Set the target tension value and tension fluctuation threshold of the conveyor belt on the controller 3, such as ±3% of the target value. If the value is exceeded, the adjustment will be activated.

[0030] Next, start the belt scale and its conveyor belt will run. Roller tension sensor 4 will collect tension data in real time, and controller 3 will display the current tension. Feed a small amount of material onto the conveyor belt and observe the tension change. If the tension rises slightly due to the weight of the material, controller 3 should not make any unnecessary adjustments. If the tension drops to the threshold, controller 3 should automatically start adjustment. The moving guide roller 67 will descend and move to generate pressure on the conveyor belt to increase the supplementary tension of the conveyor belt and ensure that the tension is stable within the target value range.

[0031] Moreover, during actual use, the controller 3 enters automatic mode, and the roller tension sensor 4 continuously monitors the tension. If the following conditions occur, the device will automatically adjust: when the tension rises, the drive motor 62 will drive the bidirectional threaded screw 63, the threaded block 64 will move closer, the moving guide roller 67 will rise, and the conveyor belt will be released, thereby releasing the tension. When the tension is too low, the drive motor 62 will rotate in the opposite direction, the threaded block 64 will move away from each other, and the moving guide roller 67 will descend, tensioning the conveyor belt to increase the tension, thereby achieving constant tension adjustment.

[0032] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A belt scale tension constant device, comprising a belt scale body (1), wherein a plurality of fixed guide rollers (5) are installed inside the belt scale body (1), and a tension adjusting mechanism (6) is provided below the belt scale body (1), characterized in that: The tension adjustment mechanism (6) includes a support base box (61). A bidirectional threaded screw (63) is rotatably connected to the inner wall of the support base box (61) via bearings. An adjustment drive motor (62) is fixedly connected to the outer surface of the support base box (61), and the output end of the adjustment drive motor (62) is connected to one end of the bidirectional threaded screw (63). Two threaded blocks (64) are threadedly connected to the outer surface of the bidirectional threaded screw (63). The top of each threaded block (64) is located above the support base box (61). The outer surface of each threaded block (64)... The surfaces are all hinged with adjusting rods (65) by pins. A mounting bracket (66) is provided above the two adjusting rods (65), and the top of the adjusting rods (65) is hinged to the mounting bracket (66) by pins. A moving guide roller (67) is rotatably connected to the upper part of the inner wall of the mounting bracket (66). Two fixed rods (10) are fixedly connected to the inner wall of the support base box (61). Multiple sliding plates (11) are fixedly connected to the outer surface of each fixed rod (10), and the outer surface of each sliding plate (11) is fixedly connected to the outer surface of the threaded block (64).

2. The belt scale tension constant device according to claim 1, characterized in that: The bottom surface of the belt scale body (1) is fixedly connected to a support frame (2), and the support frame (2) is connected to the support base box (61).

3. The belt scale tension constant device according to claim 2, characterized in that: The support frame (2) is equipped with a controller (3) on the front side, and the belt scale body (1) is equipped with a roller tension sensor (4). One of the guide rollers (5) is located to the left of the roller tension sensor (4). The controller (3) is electrically connected to the roller tension sensor (4) and the regulating drive motor (62) through wires.

4. The belt scale tension constant device according to claim 1, characterized in that: The moving guide roller (67) is located between two fixed guide rollers (5), and a plurality of reinforcing rods (13) are fixedly connected to the inner wall of each adjusting link (65).

5. The belt scale tension constant device according to claim 1, characterized in that: The upper surface of the support base box (61) has two guide grooves (12), and each of the threaded blocks (64) is slidably connected to the guide groove (12).

6. The belt scale tension constant device according to claim 1, characterized in that: The upper surface of the support base box (61) is fixedly connected to two guide slides (8), and the outer surface of the mounting bracket (66) is fixedly connected to two sliding protrusions (9), each of the sliding protrusions (9) being slidably connected to the guide slides (8).

7. The belt scale tension constant device according to claim 1, characterized in that: The outer surface of the belt scale body (1) is provided with a through groove (7), which does not affect the movement of the mounting frame (66).

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