Large hopper scale checking device and use method

Abstract

The invention discloses a large-scale hopper scale verification device and a use method, the device comprises a double-lever system, the double-lever system comprises a first fulcrum fixing block and a second fulcrum fixing block, and the top of the first fulcrum fixing block and the top of the second fulcrum fixing block are arranged at the bottom of a building ceiling. The bottom of the first fulcrum fixing block is rotatably connected with a first lever, one end of the first lever is fixedly connected with the weight platform through a steel rope, the other end of the first lever is rotatably connected with a second lever, and the second fulcrum fixing block is rotatably connected with the middle of the second lever. And the bottom of the standard pressure head bracket is sequentially connected with the standard pressure head, the cross-shaped bracket and the hopper. According to the invention, a double-lever structure is adopted, the gravity applied to the weight platform is amplified, a wide-range hopper scale can be verified only by using a light weight or heavy object, and the problems that a large number of weights are needed and carrying is difficult are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of calibration equipment, and more specifically, relates to a large hopper scale calibration device and a usage method thereof. Background Art

[0002] A hopper scale is a weighing device widely used in the industrial production field, mainly used for accurately measuring and controlling the weight of materials in a hopper. Through high-precision weighing sensors and intelligent control systems, it can achieve accurate metering of materials, automatic batching, and continuous or intermittent feeding. In industries such as chemical engineering, food, pharmaceuticals, building materials, and cement, the hopper scale can be used in links such as accurate feeding of raw materials, material monitoring during the production process, and quantitative packaging of finished products. Its characteristics of high precision and high automation not only improve production efficiency, reduce manual errors, but also effectively save costs, ensure the stability of the production process and the reliability of product quality, and are important indispensable devices in modern industrial production.

[0003] A hopper scale is a common metering device in industry. Belt-transported bulk materials enter the hopper, and the weight of the raw materials in the hopper can be measured in real time. To ensure accurate weighing, the hopper is directly placed on 3 - 4 load cells through a welded steel frame. The load cells convert the pressure signal into an analog signal that can be recognized by a computer. The hopper scale needs to be regularly calibrated for its accuracy, and standard weights are required. However, generally, the hopper scale has a large range, and the required standard weights are heavy. Some hopper scales are on a relatively high platform. With the weight method, a large amount of manpower is required to carry the weights, resulting in a large workload and low efficiency. Although the hydraulic method and the jack method are labor-saving, the equipment is complex and the installation and debugging are cumbersome. Since the hopper is open, steel plates need to be used to block it, and the weights need to be placed at the very center to accurately measure; for large hopper scales, it is difficult to ensure uniformity when applying force at multiple points, resulting in insufficient calibration accuracy. In addition, most of the existing calibration devices have complex structures and high costs, and it is difficult to adapt to hopper scales of different specifications and installation environments, especially in construction sites or narrow spaces, the applicability is limited, and the stability problem during the calibration process is also relatively prominent. The force transmission system is prone to deformation in calibration methods such as the superposition comparison method, affecting the calibration accuracy and causing the indication value of the weighing display to be unstable. The traditional method is to use heavy steel plates or other heavy objects to check the approximate accuracy and linearity of the hopper scale, and it is impossible to accurately calibrate the accuracy of the hopper scale. Summary of the Invention

[0004] In view of the above defects or improvement requirements of the prior art, the present invention provides a large hopper scale calibration device and a usage method. Through a double-lever system, the gravity of the weights is amplified by n-1 times by the first lever and transmitted to the second lever, and then transmitted to the downward pressure measurement system through the second lever. Using the lever principle, the force applied on the weight platform can be amplified. By adjusting the weight of the weights or the length ratio of the levers, the magnitude of the force applied on the hopper scale can be flexibly controlled to make it suitable for the calibration requirements of hopper scales with different ranges and specifications. Through the standard indenter in the downward pressure measurement system and the wireless transmission module, remote data reception and comparison are realized, and the centering device of the imaging system ensures the precise alignment of the cross bracket with the center point of the hopper, effectively solving the problems of inaccurate measurement and difficult data comparison in the traditional calibration method, improving the calibration accuracy, ensuring the uniformity of the force, enhancing the measurement accuracy, and making the entire calibration process more convenient and reliable.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a large hopper scale calibration device, including:

[0006] A double-lever system, which includes a first fulcrum fixing block and a second fulcrum fixing block. The tops of the first fulcrum fixing block and the second fulcrum fixing block are fixedly installed at the bottom of the building ceiling. The bottom of the first fulcrum fixing block is rotatably connected to a first lever. One end of the first lever far from the first fulcrum fixing block is fixedly connected to a weight platform through a steel rope, and the other end thereof is rotatably connected to a second lever, and the second fulcrum fixing block is rotatably connected to the middle of the second lever, for amplifying the gravity of the weights and increasing the range of the calibration device.

[0007] A downward pressure measurement system, which includes a telescopic rod. One end of the telescopic rod is rotatably connected to the other end of the second lever, and the other end thereof is fixedly connected to a standard indenter bracket. A standard indenter is provided at the bottom of the standard indenter bracket. A cross bracket is provided at the bottom of the standard indenter. A hopper is provided at the bottom of the cross bracket. A to-be-tested hopper scale is provided at the bottom of the hopper, for receiving the data of the standard indenter and comparing it with the data of the to-be-tested hopper scale to determine the detection accuracy of the to-be-tested hopper scale.

[0008] Further, the first fulcrum fixing block equally divides the first lever into n parts along its length direction, and the first fulcrum fixing block is arranged at the nth position of the first lever.

[0009] Further, four screw holes are provided at the top of the cross bracket, and four through screw holes are provided at the same position of the standard indenter bracket. The cross bracket and the standard indenter bracket are fixedly connected by connecting bolts.

[0010] Further, a concave circular groove is provided at the bottom of the standard indenter bracket. The inner wall of the circular groove is provided with internal threads, and an adjustment screw is assembled inside the circular groove. The outer surface of the adjustment screw is provided with external threads adapted to the internal threads in the circular groove.

[0011] Further, a standard indenter is fixedly connected to the bottom of the adjustment screw.

[0012] Further, a wireless transmission module is integrated inside the standard indenter. The wireless transmission module converts the force transmitted by the double-lever system to the standard indenter into a wireless analog signal through built-in sensors and a signal processing unit, enabling it to accurately capture and convert the force data. The wireless transmission module sends the generated wireless analog signal to the display.

[0013] Further, an imaging alignment device is provided near the rotation connection of the second lever and the telescopic rod on the building ceiling. The imaging alignment device is connected to the display through a cable.

[0014] Further, the telescopic rod can adjust its length according to actual needs to adjust the relative distance between the cross bracket and the hopper, so that the cross bracket contacts the hopper.

[0015] Further, the centers of the telescopic rod, the standard indenter bracket, the standard indenter, the cross bracket, and the hopper coincide.

[0016] According to the second aspect of the present invention, a method for using a large hopper scale calibration device is provided, which is implemented by applying the large hopper scale calibration device, including:

[0017] S100: According to the size of the on-site venue, select the first lever and the second lever with appropriate lengths, and use the center point of the hopper as a reference point on the ceiling. Fix and install the second fulcrum fixing block at the position on the bottom of the building ceiling at a distance from the reference point, and then fix and install the first fulcrum fixing block at the position on the bottom of the building ceiling at a distance from the second fulcrum fixing block; position, and then fixedly install the first fulcrum fixing block at the position on the bottom of the building ceiling at a distance from the second fulcrum fixing block; position;

[0018] S200: Rotationally connect the [specific position] of the first lever to the first fulcrum fixing block, rotationally connect the middle of the second lever to the second fulcrum fixing block, and rotationally connect the head and tail of the first lever and the second lever and keep them horizontal. Then, fixedly install the weight platform on the other end of the first lever through a steel rope, so that the weight platform is close to the ground but does not contact the ground; position of the first lever to the first fulcrum fixing block, rotatably connect the middle of the second lever to the second fulcrum fixing block, and rotatably connect the head and tail of the first lever and the second lever and keep them horizontal. Then, fixedly install the weight platform on the other end of the first lever through a steel rope, so that the weight platform is close to the ground but does not contact the ground;

[0019] S300: On an open space, securely install the telescopic rod on the top of the standard pressure head bracket, install the standard pressure head on the bottom of the standard pressure head bracket by adjusting the screw, and then securely connect the cross bracket to the standard pressure head bracket by connecting bolts. Then, rotatably connect the other end of the telescopic rod to the other end of the second lever, and adjust the length of the telescopic rod so that the cross bracket is close to the top of the hopper;

[0020] S400: Fixing an imaging centering device on the building ceiling near the connection between the second lever and the telescopic rod, finding the center point of the hopper using the imaging centering device, and adjusting the cross bracket so that its center coincides with the center of the hopper;

[0021] S500: Remove the connecting bolts between the cross bracket and the standard pressure head bracket, then adjust the adjusting screw to move the standard pressure head away from the cross bracket. Operate the hopper to be tested, remove the weight of the cross bracket and the hopper itself and adjust it to 0. Adjust the adjusting screw again to make the standard pressure head completely contact with the cross bracket.

[0022] S600: Place a weight on the weight platform. It can be a weight or a material that does not exceed the weighing range of the hopper to be measured. For the weight of the object, a total of 5 weights are selected for calibration, and 0, 25%, 50%, 75%, and 100% of the weighing range of the hopper to be measured are selected;

[0023] S700: Read the data of the standard pressure head and the data of the hopper scale to be measured through the display, and fill the data into the original record table;

[0024] S800: After all data are filled in, calculate the error of each set of data, check whether the error is within the accuracy range of the hopper scale to be measured, and check its measurement linearity.

[0025] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0026] 1. The large-scale hopper scale calibration device of the present invention uses a double-lever system to utilize the first lever to amplify the gravity of the weight by n-1 times and transmit it to the second lever, and then transmit it to the downward pressure measurement system through the second lever. By utilizing the lever principle, the force applied to the weight platform can be amplified. By adjusting the weight of the weight or the length ratio of the lever, the magnitude of the force applied to the hopper scale can be flexibly controlled, making it suitable for the calibration needs of hopper scales of different ranges and specifications, enhancing the versatility and adaptability of the device, overcoming the low efficiency and inconvenience of operation caused by the use and transportation of heavy weights in traditional methods, and achieving a breakthrough result of efficient and accurate calibration of large-scale hopper scales without the need for heavy weights to be hoisted, thereby improving the convenience and safety of the calibration work.

[0027] 2. The large hopper scale calibration device of the present invention realizes remote data reception and comparison through the standard indenter in the downward pressure measurement system and the wireless transmission module, and the imaging system alignment device ensures the accurate alignment of the cross bracket and the center point of the hopper, effectively solving the problems of inaccurate measurement and difficult data comparison in the traditional calibration method, significantly improving the calibration accuracy, ensuring the uniformity of force at the same time, thus enhancing the measurement accuracy and making the whole calibration process more convenient and reliable.

[0028] 3. The large hopper scale calibration device of the present invention, through the lever connection method, allows the use of heavy objects such as steel plates that can be obtained on-site to replace traditional weights for calibration. It not only cleverly solves the problems of shortage of weights or difficult handling at the construction site, but also realizes the reusable of the device, enhances its adaptability and operation flexibility, thus significantly improving the efficiency and convenience of the calibration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the large hopper scale calibration device of the embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the fulcrum of the large hopper scale calibration device of the embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the double-lever connection of the large hopper scale calibration device of the embodiment of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the downward pressure measurement system of the large hopper scale calibration device of the embodiment of the present invention;

[0033] Figure 5 It is a schematic structural diagram of the standard indenter of the large hopper scale calibration device of the embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of the adjusting screw of the large hopper scale calibration device of the embodiment of the present invention;

[0035] Figure 7 It is a schematic flow diagram of the usage method of the large hopper scale calibration device of the embodiment of the present invention.

[0036] In all the drawings, the same reference numerals represent the same technical features, specifically: 1 - first lever, 2 - second lever, 3 - first fulcrum fixing block, 4 - second fulcrum fixing block, 5 - weight platform, 6 - telescopic rod, 7 - standard indenter bracket, 8 - standard indenter, 9 - adjusting screw, 10 - cross bracket, 11 - hopper, 12 - connecting bolt, 13 - imaging alignment device, 14 - hopper scale to be measured. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] In this patent, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not preclude the existence of additional identical elements in the process, method, article or device comprising the said elements.

[0041] Embodiment 1

[0042] As Figures 1-6As shown, an embodiment of the present invention provides a large-scale hopper scale calibration device, including a double-lever system and a downward pressure measurement system. The double-lever system and the downward pressure measurement system cooperate with each other to jointly realize efficient and accurate calibration of the large-scale hopper scale. The double-lever system realizes force amplification and adjustment through the lever principle to ensure the uniformity and stability of the applied force; the downward pressure measurement system ensures the accuracy and reliability of the calibration process through precise loading and real-time measurement. The synergistic effect of the two solves the problem that a large number of weights are required and difficult to carry in traditional calibration methods, and achieves the effect of calibrating a large-scale hopper scale without lifting heavy weights, solving the problem that traditional calibration methods cannot accurately measure and compare data in real time, and achieving the effect of improving calibration accuracy and operating convenience.

[0043] like Figures 1-3 As shown, the double lever system includes a first fulcrum fixing block 3 and a second fulcrum fixing block 4, the tops of the first fulcrum fixing block 3 and the second fulcrum fixing block 4 are fixedly installed on the bottom of the building ceiling, the bottom of the first fulcrum fixing block 3 is rotatably connected to the first lever 1, and the first lever 1 is equally divided into n parts along its length direction, the first fulcrum fixing block 3 is located at one nth position of the first lever 1, the first lever 1 is fixedly connected to the weight platform 5 by a steel rope at one end away from the first fulcrum fixing block 3, so that the weight platform 5 is close to the ground but not in contact with the ground, and the other end is rotatably connected to the second lever 2, and the second fulcrum fixing block 4 is rotatably connected to the middle of the second lever 2; the first fulcrum fixing block 3 and the second fulcrum fixing block 4 are fixed to the bottom of the building ceiling Fixed connection provides a stable support structure for the entire device. The operator only needs to place a small weight on the weight platform to load the hopper scale through the lever system. There is no need for complex hydraulic equipment or a large amount of manpower to carry the weights. The double-lever system adopts a compact design structure and is installed at the bottom of the building ceiling. It does not take up additional ground space and is particularly suitable for construction sites or space-constrained environments. At the same time, the system does not require a complex hydraulic system or a large number of weights, reducing the purchase and maintenance costs of the equipment. The double-lever system can be expanded or adjusted according to actual calibration needs. For example, by adjusting the length ratio of the lever, calibration of a larger range hopper scale can be achieved, making the device highly flexible and able to adapt to the calibration requirements in different industrial scenarios.

[0044] Specifically, the relative distance between the first fulcrum fixing block 3 and the second fulcrum fixing block 4 is:

[0045]

[0046] Wherein, S is the relative distance between the first supporting point fixing block 3 and the second supporting point fixing block 4;

[0047] n is the number of equal parts of the first lever;

[0048] L1 is the length of the first lever 1;

[0049] L1 is the length of the second lever 2.

[0050] Specifically, by stacking weights on the weight platform 5, the gravity of the weights is transmitted to one end of the first lever 1 far from the first fulcrum fixing block 3 through a steel rope. The gravity of the weights is amplified by n - 1 times through the first lever 1 and transmitted to the second lever 2, and then transmitted to the downward pressure measurement system through the second lever 2. Using the lever principle, the force applied to the weight platform can be amplified. By adjusting the weight of the weights or the length ratio of the levers, the magnitude of the force applied to the hopper scale can be flexibly controlled, making it suitable for the calibration requirements of hopper scales with different ranges and specifications, and enhancing the versatility and adaptability of the device.

[0051] As Figures 4-6 shown, the downward pressure measurement system includes a telescopic rod 6 and a hopper 11. One end of the telescopic rod 6 is rotatably connected to the second lever 2, and the other end is fixedly connected to a standard indenter support 7. The bottom of the standard indenter support 7 is provided with a concave circular groove, and the inner wall of the circular groove is provided with internal threads. An adjusting screw 9 is assembled inside the circular groove. The outer surface of the adjusting screw 9 is provided with external threads adapted to the internal threads in the circular groove. A standard indenter 8 is fixedly installed at the bottom of the adjusting screw 9. By the cooperation of the adjusting screw 9 and the internal threads in the circular groove, the precise position installation and height adjustment of the standard indenter 8 can be achieved, so as to ensure that the standard indenter 8 is uniformly stressed, thereby improving the accuracy and reliability of the measurement.

[0052] Furthermore, the telescopic rod 6 can adjust its length according to actual needs to adjust the relative distance between the cross support 10 and the hopper 11, so that the cross support 10 contacts the hopper 11, thereby adapting to different working environments and increasing the flexibility and adaptability of the system.

[0053] A cross support 10 is provided at the bottom of the standard indenter 8, a hopper 11 is provided at the bottom of the cross support 10, and a to-be-tested hopper scale 14 is provided at the bottom of the hopper 11. Through the cross support 10, the force transmitted by the double-lever system can be evenly transmitted to the hopper 11.

[0054] Furthermore, the centers of the telescopic rod 6, the standard indenter support 7, the standard indenter 8, the cross support 10, and the hopper 11 coincide, ensuring that the force transmitted from the double-lever system to the hopper scale 14 is uniform and accurate, avoiding measurement errors caused by uneven force distribution, and thus improving the measurement accuracy during the calibration process.

[0055] Furthermore, four screw holes are provided at the top of the cross bracket 10, and four through screw holes are provided at the same positions on the standard indenter bracket 7. The cross bracket 10 and the standard indenter bracket 7 are fixedly connected by connecting bolts 12 to achieve precise alignment of the centers of the cross bracket 10 and the standard indenter bracket 7, ensuring uniform distribution of force. During the alignment process of the cross bracket 10 and the hopper 11, by moving the cross bracket 10, the standard indenter bracket 7 and the standard indenter 8 can move together with the cross bracket 10, facilitating precise alignment with the center of the hopper 11 and ensuring the calibration accuracy and reliability of the calibration device.

[0056] An imaging alignment device 13 is provided near the rotation connection of the second lever 2 and the telescopic rod 6 on the building ceiling. The imaging alignment device 13 is connected to the display through a cable. Its main function is to scan the upper plane of the hopper 11 and transmit the image to the display. The operator can precisely find the center point of the hopper 11 through image processing technology. By moving the cross bracket 10 and adjusting its position, the center point of the cross bracket 10 is precisely coincident with that of the hopper 11, enabling the force transmitted by the double-lever system to act evenly on the hopper 11, thereby improving the accuracy and reliability of calibration. In addition, the use of the imaging alignment device 13 also helps with the automated calibration process, reducing human error. Through automated image recognition and processing, the center point of the hopper 11 can be quickly and accurately determined without the need for complex manual measurements and adjustments, not only improving the calibration efficiency but also making the calibration process more objective and precise.

[0057] Furthermore, a wireless transmission module is integrated inside the standard indenter 8. The wireless transmission module converts the force transmitted by the double-lever system to the standard indenter 8 into a wireless analog signal through built-in sensors and signal processing units, enabling it to precisely capture and convert the force data. Subsequently, the wireless transmission module sends the generated wireless analog signal to the display, which is used to receive and display these signals, thus intuitively showing the weight readings of the calibration device and facilitating comparison with the data of the hopper scale to be measured, improving the convenience and accuracy of calibration. Through the wireless analog signal transmission method, the limitation of traditional wired connections is avoided, increasing the flexibility and applicability of the device.

[0058] Furthermore, the heavy object placed on the weight platform can be a weight or a heavy object that can be obtained on-site, such as a steel plate. However, the heavy object placed on the weight platform cannot exceed the weight of the hopper scale 14 to be measured. By using local materials, not only the problem of shortage or difficult handling of weights at the construction site is cleverly solved, but also the device can be reused, enhancing its adaptability and operational flexibility, thus significantly improving the efficiency and convenience of the calibration work.

[0059] The large hopper scale calibration device of the present invention uses a double-lever system and the lever principle to reverse-amplify the gravity of lighter weights by n-1 times, solving the problem of the need for a large number of weights and difficult handling in traditional calibration methods, achieving the effect of calibrating large-range hopper scales without hoisting heavy weights. By pressing down the standard indenter and wireless transmission module in the measurement system, it realizes remote reception of standard indenter data and comparison with the data of the hopper scale to be measured, solving the problem of inaccurate measurement and real-time data comparison in traditional calibration methods, and achieving the effect of improving calibration accuracy and operation convenience. Through the imaging system centering device, it realizes the precise alignment of the cross bracket and the center point of the hopper, solving the measurement error problem caused by uneven stress in traditional calibration methods, and achieving the effect of ensuring uniform stress and accurate measurement. Through the locally sourced and flexibly adjustable lever connection method, it realizes the use of heavy objects such as thick steel plates to replace weights for calibration, solving the problem of insufficient weights or inconvenient handling at the construction site, and achieving the effect of reusable device, strong adaptability, and flexible operation.

[0060] Embodiment 2

[0061] Combined with Figures 1-6 , as Figure 7 shown, the present invention provides a method for using a large hopper scale calibration device, which is implemented by applying the large hopper scale calibration device described above. The specific steps are as follows:

[0062] S100: According to the size of the on-site venue, select the first lever 1 and the second lever 2 with appropriate lengths, and use the center point of the hopper 11 as the reference point on the ceiling. Fix and install the second fulcrum fixing block 4 at the position on the bottom of the building ceiling at a distance from the reference point, and then fix and install the first fulcrum fixing block 3 at the position on the bottom of the building ceiling at a distance from the second fulcrum fixing block 4. position, and then fix and install the first fulcrum fixing block 3 at the position on the bottom of the building ceiling at a distance from the second fulcrum fixing block 4;

[0063] S200: Rotationally connect the position of the first lever 1 with the first fulcrum fixing block 3, rotationally connect the middle of the second lever 2 with the second fulcrum fixing block 4, and rotationally connect the head and tail of the first lever 1 and the second lever 2 and keep them horizontal. Then, fix and install the weight platform 5 at the other end of the first lever 1 through a steel rope, so that the weight platform 5 is close to the ground but does not touch the ground;

[0064] S300: Fix and install the telescopic rod 6 at the top of the standard indenter bracket 7 on the open ground, install the standard indenter 8 at the bottom of the standard indenter bracket 7 by adjusting the screw 9, then fixedly connect the cross bracket 10 with the standard indenter bracket 7 through the connecting bolt 12. Subsequently, rotationally connect the other end of the telescopic rod 6 with the other end of the second lever 2, and adjust the length of the telescopic rod 6 so that the cross bracket 10 is close to the top of the hopper 11;

[0065] S400: Fix and install the imaging centering device 13 at the connection between the building ceiling and the second lever 2 and the telescopic rod 6, and find the center point of the hopper 11 through the imaging centering device 13, and adjust the cross bracket 10 so that its center coincides with the center of the hopper;

[0066] S500: Remove the connecting bolt 12 between the cross bracket 10 and the standard indenter bracket 7, then adjust the adjusting screw 9 to move the standard indenter 8 away from the cross bracket 10. Operate the hopper scale to be measured, tare and zero the weight of the cross bracket 10 and the hopper 11 itself. Then adjust the adjusting screw 9 again so that the standard indenter is in full contact with the cross bracket 10;

[0067] S600: Place heavy objects on the weight platform 5, which can be weights or locally sourced heavy objects not exceeding the range of the hopper scale 14 to be measured. A total of 5 weights are selected for calibration, and 0, 25%, 50%, 75%, and 100% of the range of the hopper scale 14 to be measured are selected; S700: Read the data of the standard indenter 8 and the data of the hopper scale 14 to be measured through the display, and fill the data into the original record form;

[0068] S800: After all the data are filled in, calculate the error of each group of data, check whether the error is within the accuracy range of the hopper scale 14 to be measured, and check its measurement linearity.

[0069] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0070] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large hopper scale calibration device, characterized in that, Comprising: A double-lever system, which includes a first fulcrum fixing block (3) and a second fulcrum fixing block (4). The tops of the first fulcrum fixing block (3) and the second fulcrum fixing block (4) are fixedly installed at the bottom of the building ceiling. A first lever (1) is rotatably connected to the bottom of the first fulcrum fixing block (3). One end of the first lever (1) far from the first fulcrum fixing block (3) is fixedly connected to a weight platform (5) through a steel rope, and the other end thereof is rotatably connected to a second lever (2). And the second fulcrum fixing block (4) is rotatably connected to the middle of the second lever (2) for magnifying the weight of the weight and increasing the measuring range of the calibration device. A downward pressure measuring system, which includes a telescopic rod (6). One end of the telescopic rod (6) is rotatably connected to the other end of the second lever (2), and the other end thereof is fixedly connected to a standard indenter support (7). A standard indenter (8) is provided at the bottom of the standard indenter support (7). A cross support (10) is provided at the bottom of the standard indenter (8). A hopper (11) is provided at the bottom of the cross support (10). A to-be-tested hopper scale (14) is provided at the bottom of the hopper (11) for receiving the data of the standard indenter (8) and comparing it with the data of the to-be-tested hopper scale (14) to determine the detection accuracy of the to-be-tested hopper scale (14).

2. The calibration device for a large hopper scale according to claim 1, wherein The first fulcrum fixing block (3) equally divides the first lever (1) into n parts along its length direction, and the first fulcrum fixing block (3) is arranged at the 1 / n position of the first lever (1).

3. A large hopper scale calibration device according to claim 1, characterized in that, Four screw holes are provided at the top of the cross support (10), and four through screw holes are provided at the same positions of the standard indenter support (7). The cross support (10) and the standard indenter support (7) are fixedly connected by a connecting bolt (12).

4. A large hopper scale calibration device according to claim 1, characterized in that, An inwardly concave circular groove is provided at the bottom of the standard indenter support (7). Internal threads are provided on the inner wall of the circular groove. An adjusting screw (9) is assembled inside the circular groove. External threads adapted to the internal threads of the circular groove are provided on the outer surface of the adjusting screw (9).

5. A large hopper scale calibration device according to claim 4, characterized in that, The adjusting screw (9) is fixedly connected to the bottom of the standard indenter (8).

6. The calibration device for a large hopper scale according to claim 5, characterized in that, A wireless transmission module is integrated inside the standard indenter (8). The wireless transmission module converts the force transmitted from the double-lever system to the standard indenter (8) into a wireless analog signal through the built-in sensors and signal processing unit, enabling it to accurately capture and convert the force data. The wireless transmission module sends the generated wireless analog signal to the display.

7. A large hopper scale calibration device according to any one of claims 1-6, characterized in that, An imaging alignment device (13) is provided on the building ceiling near the rotational connection between the second lever (2) and the telescopic rod (6). The imaging alignment device (13) is connected to the display through a cable.

8. A large hopper scale calibration device according to any one of claims 1-6, characterized in that, The telescopic rod (6) can adjust its length according to actual needs to adjust the relative distance between the cross support (10) and the hopper (11) so that the cross support (10) contacts the hopper (11).

9. A large hopper scale calibration device according to any one of claims 1-6, characterized in that, The centers of the telescopic rod (6), the standard indenter support (7), the standard indenter (8), the cross support (10) and the hopper (11) coincide.

10. A method for using a calibration device for a large hopper scale, characterized in that, Implemented by using a large hopper scale calibration device according to any one of claims 1-9, including: S100: Select the first lever (1) and the second lever (2) with appropriate lengths according to the size of the on-site venue, and use the center point of the hopper (11) as the reference point on the ceiling. At the position of the building ceiling bottom from the reference point, fixedly install the second fulcrum fixing block (4), and then at the position of the building ceiling bottom from the second fulcrum fixing block 4 install the first fulcrum fixing block (3) fixedly; S200: Rotationally connect the position of the first lever 1 to the first fulcrum fixing block (3), rotationally connect the middle of the second lever (2) to the second fulcrum fixing block (4), rotationally connect the head and tail of the first lever (1) and the second lever (2) and keep them horizontal, and then fixedly install the weight platform (5) on the other end of the first lever (1) through a steel wire rope, so that the weight platform (5) is close to the ground but does not contact the ground; S300: Fix and install the telescopic rod (6) on the top of the standard indenter support (7) on the open ground. Install the standard indenter (8) at the bottom of the standard indenter support (7) by adjusting the screw (9). Then, fixedly connect the cross support (10) and the standard indenter support (7) through the connecting bolt (12). Subsequently, rotatably connect the other end of the telescopic rod (6) and the other end of the second lever (2). Adjust the length of the telescopic rod (6) to make the cross support (10) close to the top of the hopper (11). S400: Fix and install the imaging alignment device (13) near the connection between the second lever (2) and the telescopic rod (6) on the building ceiling. Locate the center point of the hopper (11) through the imaging alignment device (13), and adjust the cross support (10) to make its center coincide with the center of the hopper (11). S500: Remove the connecting bolt (12) between the cross support (10) and the standard indenter support (7). Then, adjust the adjusting screw (9) to move the standard indenter (8) away from the cross support (10). Operate the hopper scale to be measured, tare and zero the weight of the cross support (10) and the hopper (11) itself. Adjust the adjusting screw (9) again to make the standard indenter fully contact the cross support (10). S600: Place heavy objects on the weight platform (5), which can be weights or locally sourced heavy objects with a weight not exceeding the range of the weighing hopper to be measured (14). A total of 5 weights are selected for calibration, and 0, 25%, 50%, 75%, and 100% of the range of the weighing hopper to be measured (14) are selected. S700: Read the data of the standard indenter (8) and the hopper scale to be measured (14) through the display, and fill the data into the original record form. S800: After all the data are filled in, calculate the error of each group of data, check whether the error is within the accuracy range of the hopper scale to be measured (14), and check its measurement linearity.

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