Automatic scale calibration device for electronic weighing instrument

Abstract

The utility model discloses an automatic scale calibration device for an electronic weighing instrument, and belongs to the field of scale calibration devices, the automatic scale calibration device comprises a portal frame, a weight support, a guide rail, a walking frame, a cylinder, a lifting platform, a motor and a plc controller, the portal frame is erected on two sides of the electronic weighing instrument, the weight support is arranged between the portal frame and the weighing platform, and the guide rail and the walking frame are installed on the top of the portal frame. A rack is installed on one side of the guide rail, a gear matched with the rack is installed on the walking frame, the gear is meshed with the rack and drives the walking frame to move through a motor, an air cylinder is connected to the lower end of the walking frame and fixedly connected with a lifting table, a pallet fork used for carrying weights is arranged on the lifting table, and the motor and the air cylinder are connected with a plc. According to the device, the weights and the device are integrally placed, the electronic ground scale is calibrated at any time, the accuracy and reliability of zinc ingot weighing are ensured, the device is automatically controlled and operated by the controller, the safety risk existing in the scale calibration link of operators is avoided, and the device is simple in structure, convenient to use and good in practicability.

Description

Technical Field

[0001] The present application belongs to the field of scale calibration devices, and specifically relates to an automatic scale calibration device for electronic scales. Background Art

[0002] The automatic weighing system of zinc ingots uses a 1.5t electronic floor scale as a measuring device to weigh and measure bundles of zinc ingots. The electronic floor scale is a trade settlement measuring device. In order to ensure that the quality of factory products meets the requirements and to ensure the accuracy and reliability of trade settlement measuring equipment, the electronic floor scale must be calibrated with standard weights before or during use to ensure that its measurement is accurate and reliable. The conventional calibration method uses a crane to lift the weights onto the electronic floor scale table. During the process, the operator needs to hold the standard weights to prevent shaking and accurately drop the weights to the effective position on the table. This method requires the collaboration of multiple people and multiple devices, has low work efficiency, high personnel safety risks, is prone to collisions with other equipment, and increases maintenance costs. It is necessary to invent an automatic weighing device for electronic scales that can conveniently and efficiently complete the calibration of electronic floor scales. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the present invention provides an automatic weighing device for an electronic scale. A movable traveling frame and a lifting platform driven by a cylinder are set up on both sides of the electronic scale. The standard weights placed on the bracket are transported to the electronic floor scale surface by a fork to calibrate the electronic floor scale. The calibration process is precisely controlled by a controller.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an automatic weighing device for an electronic scale, comprising a gantry, a weight bracket, a guide rail, a traveling frame, a cylinder, a lifting platform, a motor, and a PLC controller. The gantry is mounted on both sides of the electronic scale, a weight bracket is arranged between the gantry and the weighing platform, a guide rail and a traveling frame are installed on the top of the gantry, a rack is installed on one side of the guide rail, a gear matching the rack is installed on the traveling frame, the gear is meshed with the rack and the traveling frame is driven to move by a motor, a cylinder is connected to the lower end of the traveling frame, the end of the cylinder piston rod is fixedly connected to the lifting platform, a fork for carrying weights is arranged on the lifting platform, and the motor, cylinder and PLC controller are electrically connected.

[0005] Furthermore, one end of the weight bracket is fixed on the weighing platform, and the other end is fixed on the portal beam, and the two weight brackets are arranged opposite to each other for placing weights.

[0006] Furthermore, the fork is arranged corresponding to the moving groove opened on the weight.

[0007] Furthermore, a limiting device is installed on the guide rail.

[0008] Beneficial effects of this application:

[0009] The present application provides an automatic weighing calibration device for an electronic weighing instrument, in which standard weights are placed integrally with the device through a weight bracket, and the weights can be moved to the electronic floor scale table at any time before and during use of the electronic floor scale for weighing calibration, thereby ensuring the accuracy and reliability of zinc ingot weighing. The device adopts a controller for automatic control operation, thereby avoiding the safety risks of operators in the weighing calibration link. The device has a simple structure, is easy to use, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of this application;

[0011] Figure 2 This is a schematic diagram of the top view of the structure of this application;

[0012] Figure 3 Schematic diagram of the fork structure;

[0013] Figure 4 Schematic diagram of the weight structure;

[0014] In the figure, 1 is the gantry, 2 is the guide rail, 3 is the walking frame, 4 is the cylinder, 5 is the lifting platform, 6 is the weight bracket, 7 is the electronic scale, 8 is the motor, 9 is the weighing platform, 10 is the gear, 11 is the weight, and 12 is the fork. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technical personnel.

[0016] As shown in the figure, the automatic weighing device for the electronic weighing instrument 7 includes a gantry 1, a guide rail 2, a walking frame 3, a cylinder 4, a lifting platform 5, a weight bracket 6, a motor 8, and a PLC controller. The electronic weighing instrument 7 is installed on the weighing platform 9, and the gantry 1 is installed on both sides of the weighing platform 9 and fixed to the ground. The two horizontally parallel vertical beams of the gantry 1 are connected by a crossbeam in the middle, and the crossbeam is used to enhance the stability of the gantry 1 and install the weight bracket 6. The weight bracket 6 includes a transverse rod and two vertical rods, one of which is fixed on the weighing platform 9, and the other vertical rod is fixed on the crossbeam of the gantry 1, and the transverse rod vertically connects the two vertical rods. The two weight brackets are relatively arranged on both sides of the gantry, and are used to place the weight 11 horizontally on the side of the electronic weighing instrument 7.

[0017] Two guide rails 2 are installed on the top of the vertical beam of the door frame 1. The guide rails 2 are designed with racks. The walking frame 3 is set across the guide rails 2. The bottom of the walking frame 3 is installed with a gear 10 corresponding to the rack. The gear 10 at the shaft end of the servo motor 8 is meshed with the guide rack to drive the walking frame 3 to move on the guide rail 2. In order to accurately position the device, the standard weight 11 is stably placed above the calibration position of the electronic scale 7 table. A limit switch is installed on the guide rail 2 above the corresponding position. The walking frame 3 stops moving after contacting the limit switch. At this time, the lowered weight 11 can be accurately placed, making the control of the walking frame stroke more accurate. The lifting platform 5 is fixed to the lower part of the walking frame 3 and can be freely lifted and lowered by the cylinder 4. The lifting platform is connected with a fork 12. The fork 12 is set corresponding to the moving groove opened at the bottom of the weight 11. The standard weight 11 can be forked from the weight bracket 6 and carried to the electronic scale 7 table. In order to further improve the accuracy of the moving position of the standard weight 11 and prevent the standard weight 11 from being unable to be lifted normally due to the position deviation of the lifting platform fork 12, the device connects the cylinder 4 and the motor 8 through a PLC controller, and controls the stroke of the walking frame 3 and the cylinder 4 through the controller for accurate positioning.

[0018] The use process of this device is as follows: the driving motor is controlled by the PLC controller, so that the servo motor 8 installed on the traveling frame 3 drives the traveling frame 3 to move forward to the preset position, and the cylinder 4 is turned on so that the cylinder 4 drives the lifting platform 5 to move downward to the position where the fork 12 is slightly lower than the bottom of the standard weight 11. At this time, the traveling frame 3 continues to move forward driven by the servo motor 8, the fork 12 enters the bottom of the standard weight 11, and the fork 12 is inserted into the moving groove at the bottom of the weight 11. After the traveling frame 3 moves forward, the standard weight 11 is completely placed on the weight bracket 6, and the traveling frame 3 stops moving. The cylinder 4 drives the lifting platform 5 to move upward, forks the standard weight 11 to the preset position, and the traveling frame 3 moves to the preset position driven by the servo motor 8 and stops. At this time, the lifting platform 5 and the fork 12 slowly move downward under the drive of the cylinder 4 to the position where the standard weight 11 completely falls on the table of the electronic scale 7 for calibration. The fork 12 of the lifting platform 5 continues to move downward under the drive of the cylinder 4 until it is slightly below the bottom of the standard weight 11 and does not touch the surface of the electronic scale 7. The cylinder 4 stops moving, and the lifting platform 5 moves in the opposite direction under the drive of the servo motor 8 until the fork 12 completely leaves the bottom of the standard weight 11, and the lifting platform 5 stops moving. At this time, the calibration of the electronic scale 7 is carried out. After the calibration is completed, the device forks the standard weight 11 back to the weight bracket 6 with the reverse stroke.

[0019] The present application provides an automatic weighing calibration device for an electronic weighing instrument, in which standard weights are placed integrally with the device through a weight bracket, and the weights can be moved to the electronic floor scale table at any time before and during use of the electronic floor scale for weighing calibration, thereby ensuring the accuracy and reliability of zinc ingot weighing. The device adopts a controller for automatic control operation, thereby avoiding the safety risks of operators in the weighing calibration link. The device has a simple structure, is easy to use, and has good practicality.

[0020] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. An automatic calibration device for an electronic scale, characterized in that: It includes a gantry, a weight bracket, a guide rail, a traveling frame, a cylinder, a lifting platform, a motor, and a PLC controller. The gantry is mounted on both sides of the electronic scale, a weight bracket is arranged between the gantry and the weighing platform, a guide rail and a traveling frame are installed on the top of the gantry, a rack is installed on one side of the guide rail, a gear matching the rack is installed on the traveling frame, the gear is meshed with the rack and the traveling frame is driven to move by a motor, a cylinder is connected to the lower end of the traveling frame, the end of the cylinder piston rod is fixedly connected to the lifting platform, a fork for carrying weights is arranged on the lifting platform, and the motor, cylinder and PLC controller are electrically connected.

2. The automatic weighing device for an electronic weighing instrument according to claim 1, characterized in that: One end of the weight bracket is fixed on the weighing platform, and the other end is fixed on the portal crossbeam. The two weight brackets are arranged opposite to each other for placing weights.

3. The automatic weighing device for an electronic weighing instrument according to claim 1, characterized in that: The cargo fork is arranged correspondingly to the moving groove opened on the weight.

4. The automatic weighing device for an electronic weighing instrument according to claim 1, characterized in that: A limiting device is installed on the guide rail.

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