Hopper scale portal frame calibration device and method

Abstract

The invention belongs to the technical field of hopper scale calibration, and discloses a hopper scale portal frame calibration device and method. The device can be connected with a hopper scale, the device comprises a portal frame upper plate, two portal frame supporting columns, a jack, a pressure sensor and a display screen, the portal frame supporting columns are arranged in the vertical direction at intervals in the horizontal direction, the bottoms of the portal frame supporting columns are fixed to a foundation, and the portal frame upper plate is arranged in the horizontal direction. Pressure is applied through the jack, the weight loading process is simulated, manpower input and operation time are greatly reduced, and the device is particularly suitable for occasions where multiple hopper scales are continuously calibrated. The potential safety hazard of manually carrying heavy objects to go up and down a high-altitude platform is avoided, the operation risk is reduced, and the safety production requirement is met. The pressure sensor monitors the applied pressure in real time and compares the applied pressure with the reading of the hopper scale, so that the accuracy and reliability of the scale calibration process are ensured, and the precision requirement of static scale calibration is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hopper scale calibration, and particularly relates to a hopper scale gantry calibration device and method. BACKGROUND

[0002] Hopper scale calibration is a systematic process, mainly including static calibration and dynamic calibration. Generally, static calibration is performed first to ensure the basic accuracy of sensors and instruments, and then dynamic calibration is performed to optimize the control accuracy of the whole system.

[0003] In traditional static calibration, standard weights with sufficient precision (usually M1 or above) and sufficient quantity need to be prepared during calibration. The total weight of the weights should be not less than 50% of the maximum range of the hopper scale, and preferably more than 80%. The weights are carried to the hopper scale for calibration, which not only consumes time and effort, increases the labor intensity of workers, but also cannot guarantee the calibration effect, bringing inconvenience to use. Taking the hopper scale in the steelmaking plant of Tianjin Steel Pipe Company as an example, about 2 tons of weights are needed to be placed on the hopper scale body for multi-point calibration, and since there are 9 scales on site that need to be calibrated, and the weights need to be manually carried, the process is very time-consuming and labor-intensive, and since the hopper is located at a high position, accidents are prone to occur when going up and down the stairs.

[0004] Therefore, a portable, fast and safe hopper scale calibration device and method are needed. SUMMARY

[0005] The application aims to overcome the deficiencies in the prior art and provide a hopper scale gantry calibration device and method.

[0006] The application solves the technical problems by adopting the following technical scheme: A hopper scale gantry calibration device, which can be connected with a hopper scale, comprises a gantry upper plate, gantry support columns, a jack, a pressure sensor and a display screen. The gantry support columns are arranged in a vertical direction and are spaced apart in a horizontal direction. The bottom of the gantry support columns is fixed on a foundation. The gantry upper plate is arranged in a horizontal direction. The lower surface of the gantry upper plate is fixedly connected with the upper surface of the gantry support columns. The jack is arranged in a vertical direction. The working end of the jack is connected with the lower surface of the gantry upper plate. The jack is installed between the two gantry support columns. The jack, the pressure sensor and the hopper scale are coaxially connected in a vertical direction. The display screen is connected with the pressure sensor and the hopper scale through electrical signals. The pressure sensor and the hopper scale can measure the pressure of the jack and transmit the pressure to the display screen through electrical signals.

[0007] Further, the jack is a hydraulic jack.

[0008] Further, the connecting mode of the gantry support column and the upper plate of the gantry can be welding connection, can be integrally made, or can be connected and arranged through bolt and nut tight fixation.

[0009] The use method of the gantry calibration device as described above comprises the following steps: (1) first, adjust the hopper scale to zero point, then assemble the device and place it on the hopper scale, and then record the reading of the hopper scale at this time as the initial reading; (2) start the jack, and as the working end of the jack moves upward to press against the upper plate of the gantry, the upper plate of the gantry cannot move due to the fixation of the gantry support column, and at the same time, the force applied by the jack is transmitted downward to the pressure sensor and the hopper scale through the reaction force, the pressure sensor and the hopper scale will transmit the signal of the pressure they receive to the display screen, and the display screen will display the pressure received by the pressure sensor and the hopper scale; (3) compare the reading of step (2) on the hopper scale minus the initial reading of step (1) with the reading of the pressure sensor, and when they are equal, the calibration of the hopper scale is completed.

[0010] Further, the gantry calibration device further comprises a balance plate, the balance plate is arranged on the hopper scale along the horizontal direction and symmetrically along the center of the hopper scale, and the horizontal two ends of the balance plate are symmetrically arranged along the vertical direction gantry upper plate, gantry support column, jack, pressure sensor.

[0011] Further, the balance plate, the gantry support column and the upper plate of the gantry are all rigid materials.

[0012] The use method of the gantry calibration device as described above comprises the following steps: (1) first, adjust the hopper scale to zero point, then assemble the device and place it on the hopper scale, and then record the reading of the hopper scale at this time as the initial reading; (2) then start the jack, and as the working end of the jack moves upward to press against the upper plate of the gantry, the upper plate of the gantry cannot move due to the fixation of the gantry support column, and at the same time, the force applied by the jack is transmitted downward to the pressure sensor and the balance plate through the reaction force, the balance plate will transmit the force received on both sides to the hopper scale below the center, the pressure sensor and the hopper scale will transmit the signal of the pressure they receive to the display screen, and the display screen will display the pressure received by the pressure sensor and the hopper scale; (3) compare the reading of step (2) on the hopper scale minus the initial reading of step (1) with the sum of the readings of the pressure sensors on both sides, and when they are equal, the calibration of the hopper scale is completed.

[0013] The advantages and positive effects obtained by the present application are: 1、The device mainly comprises a gantry upper plate, a supporting column, a jack, a pressure sensor and a display screen, etc., has clear structure, common components, is convenient for on-site quick assembly and disassembly, and is suitable for various working conditions.

[0014] 2、The device applies pressure through the jack to simulate the weight loading process, greatly reduces the labor input and operation time, is especially suitable for occasions of continuous calibration of multiple hopper scales, avoids the safety hazards of manually carrying heavy objects up and down high platforms, reduces the operation risk, meets the safety production requirements, monitors the applied pressure in real time through the pressure sensor, compares with the hopper scale reading, ensures the accuracy and reliability of the calibration process, and meets the precision requirements of static calibration.

[0015] 3、The device can select single-point or double-point (with a balance plate) force applying mode according to the structural characteristics of the hopper scale, effectively avoids stress concentration, protects the hopper scale structure, and prolongs the service life of the device. Without the need to purchase a large number of high-precision weights, the device reduces the equipment investment and maintenance cost, and is especially suitable for small and medium-sized enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural connection main view schematic diagram of the present application; Figure 2 is another structural connection main view schematic diagram of the present application; Figure 3 is a kind of real photo of the present application; Figure 4 is another kind of real photo of the present application. DETAILED DESCRIPTION

[0017] The present application is further described below in conjunction with examples, which are descriptive and not limiting, and cannot limit the protection scope of the present application by the following examples.

[0018] The various experimental operations involved in the specific examples are all conventional techniques in the art, and the parts not specially noted in the text can be implemented by referring to various commonly used tool books, scientific and technical literature or related instructions, manuals, etc. before the application date of the present application.

[0019] A kind of hopper scale gantry calibration device, such as Figure 1As shown, the device can be connected with the hopper scale 5, the device comprises a gantry upper plate 1, a gantry support column 2, a jack 3, a pressure sensor 4 and a display screen (not shown in the figure), the gantry support column is arranged in the vertical direction, and two are arranged in the horizontal direction, the bottom of the gantry support column is fixed on the foundation, the gantry upper plate is arranged in the horizontal direction, the lower surface of the gantry upper plate is closely fixed and connected with the upper surface of the gantry support column, the jack is arranged in the vertical direction, the working end of the jack is connected with the lower surface of the gantry upper plate, the jack is installed between the two gantry support columns, the jack, the pressure sensor and the hopper scale are coaxially connected in sequence in the vertical direction, the display screen is connected with the pressure sensor and the hopper scale through electrical signals, and the pressure sensor and the hopper scale can measure the pressure received by the jack and transmit the pressure to the display screen for display through electrical signals.

[0020] Preferably, the jack is a hydraulic jack, which can provide greater pressure and better meet the pressure required when the hopper scale is calibrated.

[0021] In this embodiment, the connection mode of the gantry support column and the gantry upper plate can be welding connection, one-piece production or closely fixed connection through bolts and nuts.

[0022] The device mainly comprises a gantry upper plate, a support column, a jack, a pressure sensor and a display screen, which has clear structure, common components, is convenient for on-site quick assembly and disassembly, is suitable for various working conditions, and has the advantages of portability, rapidness and safety.

[0023] The use method of the gantry calibration device as described above comprises the following steps: (1) first adjust the hopper scale to zero, then assemble the device on the hopper scale, and then record the reading of the hopper scale at this time as the initial reading; (2) start the jack, and as the working end of the jack moves upward to press against the gantry upper plate, the gantry upper plate cannot move due to the fixation of the gantry support column, and the force applied by the jack is transmitted downward to the pressure sensor and the hopper scale through the reaction force, the pressure sensor and the hopper scale transmit the signal of the pressure received to the display screen, and the display screen displays the pressure received by the pressure sensor and the hopper scale; (3) compare the reading of the hopper scale in step (2) with the initial reading in step (1) after subtraction, and when they are equal, the calibration of the hopper scale is completed.

[0024] The present application simulates the process of weight loading by applying pressure through the jack, greatly reducing the labor input and operation time, and is especially suitable for occasions where multiple hopper scales are continuously calibrated. The safety hazards of manually carrying heavy objects up and down high platforms are avoided, the operation risk is reduced, and the safety production requirements are met. The applied pressure is monitored in real time through the pressure sensor and compared with the hopper scale reading to ensure the accuracy and reliability of the calibration process and meet the precision requirements of static calibration.

[0025] Due to the structure of some hopper scales and hoppers, the device is not easy to fix and place, so in the present embodiment, as shown in Figure 2 The gantry calibration device further includes a balance plate 6 arranged horizontally and symmetrically on the hopper scale along the center of the hopper scale, ensuring that the balance plate will not tilt when the device applies the same force to the horizontal two sides of the balance plate. The horizontal two ends of the balance plate are symmetrically arranged on the gantry upper plate, the gantry support column, the jack, and the pressure sensor in the vertical direction. This method can further reduce the damage to the hopper scale caused by stress concentration of the jack and reduce the stress limit required by a single jack.

[0026] In the present embodiment, the balance plate, the gantry support column, and the gantry upper plate are all made of rigid materials.

[0027] The use method of the gantry calibration device as described above includes the following steps: (1) First, adjust the hopper scale to zero, then assemble the device and place it on the hopper scale, and then record the reading of the hopper scale at this time as the initial reading; (2) Then start the jack, and as the working end of the jack moves upward to press against the gantry upper plate, the gantry upper plate cannot move due to the fixation of the gantry support column. At the same time, the force applied by the jack is transmitted downward to the pressure sensor and the balance plate through the reaction force. The balance plate transmits the force received on both sides to the hopper scale below the center. The pressure sensor and the hopper scale transmit the signal of the pressure they receive to the display screen, and the display screen displays the pressure received by the pressure sensor and the hopper scale; (3) Compare the sum of the readings of the two pressure sensors after subtracting the initial reading of step (1) from the reading of step (2) on the hopper scale. When the two are equal, the calibration of the hopper scale is complete.

[0028] The present application can select single-point or double-point force application mode according to the structural characteristics of the hopper scale, effectively avoid stress concentration, protect the structure of the hopper scale, and prolong the service life of the equipment. There is no need to purchase a large number of high-precision weights, which reduces the equipment investment and maintenance cost, and is especially suitable for small and medium-sized enterprises.

[0029] Although the embodiments of the present application have been disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, and thus the scope of the present application is not limited to the disclosed embodiments.

Claims

1. A gantry weighing device for hopper scales, characterized in that: The device can be connected to a hopper scale. The device includes a gantry frame upper plate, gantry frame support columns, a jack, a pressure sensor, and a display screen. The gantry frame support columns are arranged vertically, with two columns spaced horizontally. The bottom of each support column is fixed to a foundation. The gantry frame upper plate is arranged horizontally, with its lower surface tightly fixed to the upper surface of each support column. The jack is arranged vertically, with its working end connected to the lower surface of the upper plate. The jack is installed between two support columns. The jack, pressure sensor, and hopper scale are coaxially connected vertically. The display screen is connected to the pressure sensor and hopper scale via an electrical signal. The pressure sensor and hopper scale can measure the pressure exerted by the jack and transmit the measured pressure to the display screen via an electrical signal.

2. The apparatus according to claim 1, characterized in that: The jack is a hydraulic jack.

3. The apparatus according to claim 1, characterized in that: The connection between the gantry support column and the gantry upper plate can be welded, integrally formed, or tightly fixed with bolts and nuts.

4. The method of using the gantry crane calibration device as described in claim 1, characterized in that: Includes the following steps: (1) First, adjust the hopper scale to zero, then assemble the device and place it on the hopper scale. Then record the reading of the hopper scale at this time as the initial reading. (2) Start the jack. As the working end of the jack moves upward and presses against the upper plate of the gantry frame, the upper plate of the gantry frame cannot move due to the fixation of the gantry frame support column. At the same time, the force applied by the jack is transmitted downward to the pressure sensor and the hopper scale through the reaction force. The pressure sensor and the hopper scale will transmit the pressure signal they receive to the display screen, and the display screen will show the pressure magnitude received by the pressure sensor and the hopper scale. (3) Subtract the initial reading from step (1) from the reading of the hopper scale in step (2) and compare it with the reading of the pressure sensor. When the two are equal, the hopper scale calibration is complete.

5. The apparatus according to claim 1, characterized in that: The gantry weighing device also includes a balance plate, which is arranged horizontally and symmetrically on the hopper scale along the center of the hopper scale. The horizontal ends of the balance plate are symmetrically arranged vertically along the upper plate of the gantry, the gantry support column, the jack, and the pressure sensor.

6. The apparatus according to claim 5, characterized in that: The balance plate, gantry support column, and gantry top plate are all made of rigid materials.

7. The method of using the gantry crane calibration device as described in claim 6, characterized in that: Includes the following steps: (1) First, adjust the hopper scale to zero, then assemble the device and place it on the hopper scale. Then record the reading of the hopper scale at this time as the initial reading. (2) Then start the jack. As the working end of the jack moves upward and presses against the upper plate of the gantry frame, the upper plate of the gantry frame cannot move due to the fixation of the gantry frame support column. At the same time, the force applied by the jack is transmitted downward to the pressure sensor and the balance plate through the reaction force. The balance plate transmits the force on both sides to the hopper scale below the center. The pressure sensor and the hopper scale will transmit the pressure signal they receive to the display screen. The display screen will show the pressure magnitude received by the pressure sensor and the hopper scale. (3) Subtract the initial reading from step (1) from the reading of the hopper scale in step (2) and compare it with the sum of the readings of the pressure sensors on both sides. When the two are equal, the hopper scale calibration is complete.

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