Static belt scale automatic static calibration device

Abstract

This utility model discloses an automatic static calibration device for belt scales, relating to the field of belt scale technology. It includes: a support frame; a limiting structure comprising a limiting groove, a receiving groove, and a limiting block; limiting grooves are formed on the inner top walls of both grooves, and receiving grooves are provided on the upper surfaces of both insert arms; each receiving groove is connected to a limiting block via a spring, and the limiting block is adapted to the limiting groove; when the limiting block is inside the receiving groove, the spring is compressed; a weight reset mechanism comprising an electric push rod and an electromagnet; the electric push rod is horizontally mounted on the support frame and connected to the electromagnet; the electromagnet is positioned on the rear side corresponding to the magnetic weight, and the electromagnet is magnetically adapted to the magnetic weight; and a controller connected to the electric push rod and the electromagnet respectively. This utility model greatly simplifies the structure for resetting magnetic weights, and simplifies the control process by controlling the electromagnet and electric push rod through the controller.

Description

Technical Field

[0001] This utility model relates to the field of belt scale technology, and in particular to an automatic static calibration device for a static belt scale. Background Technology

[0002] Belt scales are automatic weighing instruments that continuously weigh bulk materials on a conveyor belt without requiring subdivision of mass or interruption of the conveyor belt's movement. They are mainly classified by the load-bearing device: weighing platform type load-bearing device and conveyor type load-bearing device; and by belt speed: single-speed belt scales and variable-speed belt scales. During the use of belt scales, a weight calibration process is required to improve measurement accuracy.

[0003] The applicant's earlier patent application CN 217424535 U discloses an automatic static calibration device for a static belt scale. Although the earlier patent application has solved the problem of automatic reset of the weights during the calibration process, the drive of the magnetic block requires adjustment in both the vertical and horizontal directions, and the drive structure is relatively complex. During the separation of the magnetic block and the magnetic weight, the output shaft of the electric push rod needs to extend to separate the magnetic block and the magnetic weight. Since there is still magnetic force between the magnetic block and the magnetic weight during separation, a lateral pulling force is generated on the reset spring. After a period of use, the service life of the reset spring will decrease, and automatic control cannot be well achieved. In addition, the entire calibration process lacks status feedback, and it is difficult to detect in time if the reset fails or jams.

[0004] Therefore, an automatic static calibration device for static belt scales was developed to solve the above problems. Utility Model Content

[0005] This invention proposes an automatic static calibration device for static belt scales to solve the problem of lack of status feedback in existing automatic static calibration devices for static belt scales.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] An automatic static calibration device for a static belt scale includes:

[0008] The support frame is equipped with a magnetic weight and two adjustable arms. The magnetic weight has two downward-facing grooves, and the two arms are inserted into the corresponding grooves.

[0009] The limiting structure includes a limiting groove, a receiving groove, and a limiting block. The top inner walls of the two grooves are provided with limiting grooves, and the upper surfaces of the two insert arms are provided with receiving grooves. Each receiving groove is connected to a limiting block by a spring. The limiting block is adapted to the limiting groove. When the limiting block is located inside the receiving groove, the spring is in a compressed state.

[0010] The weight reset mechanism includes an electric push rod and an electromagnet. The electric push rod is horizontally mounted on the support frame and connected to the electromagnet. The electromagnet is located on the rear side corresponding to the magnetic weight, and the electromagnet is magnetically matched with the magnetic weight.

[0011] The controller is connected to the electric actuator and electromagnet respectively.

[0012] Furthermore, a light-absorbing layer is provided on the inner wall of the storage slot, and a reflective infrared sensor is provided on one side of the inner wall of the storage slot. The side of the limiting block corresponding to the reflective infrared sensor is a diffuse reflective surface, and the reflective infrared sensor is connected to the controller.

[0013] Furthermore, the diffuse reflective surface is a reflective film disposed on one side of the limiting block.

[0014] Furthermore, the light-absorbing layer is one of the following: a black velvet layer, a matte black paint coating, or a black non-woven fabric layer.

[0015] Furthermore, the electric actuator and the electromagnet are connected via a connecting rod assembly, which includes a horizontal rod and a vertical rod. One end of the horizontal rod is connected to the end of the electric actuator, the other end of the horizontal rod is connected to the top of the vertical rod, and the bottom end of the vertical rod is connected to the top of the electromagnet.

[0016] Furthermore, the electromagnet is a block-shaped electromagnet.

[0017] Furthermore, the support frame includes two brackets arranged on the left and right, two liftable insert arms, a magnetic weight, and an electromagnet located between the two brackets, and an electric push rod horizontally positioned on top of one of the brackets.

[0018] The beneficial effects of this utility model are as follows:

[0019] The automatic static calibration device for a static belt scale proposed in this utility model eliminates the need for vertical drive control by controlling the on / off state of an electromagnet, greatly simplifying the structure for resetting the magnetic weights. Furthermore, the control process is simplified by using a controller to control the electromagnet and the electric push rod. Attached Figure Description

[0020] Figure 1 This is a main schematic diagram of the automatic static calibration device for the static belt scale in this application;

[0021] Figure 2 for Figure 1 Enlarged structural diagram of A in the middle;

[0022] Figure 3 This is a side view of the automatic static calibration device for the static belt scale of this application in the state of engagement between the limiting groove and the limiting block;

[0023] Figure 4 This is a side view of the automatic static calibration device for the static belt scale of this application in the state where the limit groove and the limit block are not engaged;

[0024] Figure 5 This is a schematic diagram of the control principle of the controller in the automatic static calibration device for the static belt scale of this application.

[0025] In the diagram: 1-Support frame; 2-Magnetic weight; 3-Insertion arm; 4-Electromagnet; 5-Electric push rod; 6-Horizontal rod; 7-Vertical rod; 8-Limiting groove; 9-Storage groove; 10-Spring; 11-Reflective infrared sensor; 12-Controller; 13-Limiting block; 14-Diffuse reflective surface. Detailed Implementation

[0026] 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, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] like Figure 1-5 As shown, an automatic static calibration device for a static belt scale includes:

[0034] The support frame 1 is equipped with a magnetic weight 2 and two liftable insert arms 3. The magnetic weight 2 has two downward-facing grooves, and the two insert arms 3 are inserted into the corresponding grooves.

[0035] The limiting structure includes a limiting groove 8, a receiving groove 9, and a limiting block 13. The top inner walls of the two grooves are provided with limiting grooves 8, and the upper surfaces of the two insert arms 3 are provided with receiving grooves 9. Each receiving groove 9 is connected to a limiting block 13 by a spring 10. The limiting block 13 is adapted to the limiting groove 8. When the limiting block 13 is located inside the receiving groove 9, the spring 10 is in a compressed state.

[0036] The weight reset mechanism includes an electric push rod 5 and an electromagnet 4. The electric push rod 5 is horizontally mounted on the support frame 1 and connected to the electromagnet 4. The electromagnet 4 is located on the rear side corresponding to the magnetic weight 2, and the electromagnet 4 is magnetically compatible with the magnetic weight 2.

[0037] Controller 12 is connected to electric push rod 5 and electromagnet 4 respectively.

[0038] In one embodiment, a light-absorbing layer is provided on the inner wall of the storage slot 9, and a reflective infrared sensor 11 is provided on one side of the inner wall of the storage slot 9. The side of the limiting block 13 corresponding to the reflective infrared sensor 11 is a diffuse reflection surface 14. The reflective infrared sensor 11 is connected to the controller 12 for control.

[0039] In one embodiment, the diffuse reflective surface 14 is a reflective film disposed on one side of the limiting block 13.

[0040] In one embodiment, the light-absorbing layer is one of a black velvet layer, a matte black paint coating, or a black non-woven fabric layer.

[0041] In one embodiment, the electric push rod 5 and the electromagnet 4 are connected by a connecting rod assembly, which includes a horizontal rod 6 and a vertical rod 7. One end of the horizontal rod 6 is connected to the end of the electric push rod 5, the other end of the horizontal rod 6 is connected to the top of the vertical rod 7, and the bottom end of the vertical rod 7 is connected to the top of the electromagnet 4.

[0042] In one embodiment, electromagnet 4 is a block-shaped electromagnet.

[0043] In one embodiment, the support frame 1 includes two brackets arranged on the left and right, two liftable insert arms 3, a magnetic weight 2, and an electromagnet 4 are all located between the two brackets, and an electric push rod 5 is horizontally arranged on the top of one of the brackets.

[0044] The working process of this invention is as follows:

[0045] In the initial state, the limiting block 13 is connected to the limiting groove 8. At this time, the controller 12 receives a weak infrared reflection signal from the reflective infrared sensor 11 and controls the electromagnet 4 to be in the off state. During use, if the belt scale vibrates too much, causing the limiting block 13 to disengage from the limiting groove 8, resulting in a misalignment between the magnetic weight 2 and the two insert arms 3, and the spring 10 is in a compressed state, the infrared reflection signal received by the controller 12 is significantly enhanced under the action of the diffuse reflection surface 14 on one side of the limiting block 13. At this time, the controller 12 controls the electromagnet 4 to turn on and controls the electric push rod 5 to move the electromagnet 4 horizontally closer to the magnetic weight 2 in front, so that the limiting block 13 and the limiting groove 8 are connected again. The infrared reflection signal received by the controller 12 is greatly weakened under the action of the light-absorbing layer. At this time, the controller 12 controls the electromagnet 4 to turn off and lose its magnetism. After the position is adjusted, the magnetic weight 2 can be smoothly brought into the weighing tray below by the liftable insert arms 3. The insert arms 3 are raised and lowered by an electric screw.

[0046] This invention proposes an automatic static calibration device for a static belt scale. By controlling the on / off state of an electromagnet, vertical drive control is eliminated, greatly simplifying the structure for resetting the magnetic weights. Furthermore, the controller simplifies the control process by controlling both the electromagnet and the electric push rod. The device utilizes a reflective infrared sensor, a diffuse reflective surface, and a light-absorbing layer to determine the engagement state between the limit block and the limit groove, allowing for timely de-energization and energization of the electromagnet to prevent lateral pulling on the spring.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic static calibration device for a static belt scale, characterized in that, include: The support frame is equipped with a magnetic weight and two adjustable arms. The magnetic weight has two downward-facing grooves, and the two arms are inserted into the corresponding grooves. The limiting structure includes a limiting groove, a receiving groove, and a limiting block. The top inner walls of the two grooves are provided with limiting grooves, and the upper surfaces of the two insert arms are provided with receiving grooves. Each receiving groove is connected to a limiting block by a spring. The limiting block is adapted to the limiting groove. When the limiting block is located inside the receiving groove, the spring is in a compressed state. The weight reset mechanism includes an electric push rod and an electromagnet. The electric push rod is horizontally mounted on the support frame and connected to the electromagnet. The electromagnet is located on the rear side corresponding to the magnetic weight, and the electromagnet is magnetically matched with the magnetic weight. The controller is connected to the electric actuator and electromagnet respectively.

2. The automatic static calibration device for a static belt scale according to claim 1, characterized in that, A light-absorbing layer is provided on the inner wall of the storage slot, and a reflective infrared sensor is provided on one side of the inner wall of the storage slot. The side of the limiting block corresponding to the reflective infrared sensor is a diffuse reflective surface. The reflective infrared sensor is connected to the controller.

3. The automatic static calibration device for a static belt scale according to claim 2, characterized in that, The diffuse reflective surface is a reflective film disposed on one side of the limiting block.

4. The automatic static calibration device for a static belt scale according to claim 2, characterized in that, The light-absorbing layer is one of the following: a black velvet layer, a matte black paint coating, or a black non-woven fabric layer.

5. The automatic static calibration device for a static belt scale according to claim 1, characterized in that, The electric actuator and the electromagnet are connected by a connecting rod assembly, which includes a horizontal rod and a vertical rod. One end of the horizontal rod is connected to the end of the electric actuator, the other end of the horizontal rod is connected to the top of the vertical rod, and the bottom end of the vertical rod is connected to the top of the electromagnet.

6. The automatic static calibration device for a static belt scale according to claim 1, characterized in that, The electromagnet is a block-shaped electromagnet.

7. The automatic static calibration device for a static belt scale according to claim 1, characterized in that, The support frame includes two brackets arranged on the left and right, two liftable insert arms, a magnetic weight, and an electromagnet located between the two brackets, and an electric push rod horizontally set on top of one of the brackets.

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