Weighing module with self-calibration function

Abstract

The utility model discloses a weighing module with a self-calibration function, which comprises a weighing sensor, a self-calibration weighing module top plate arranged above the weighing sensor, a self-calibration weighing module bottom plate arranged below the weighing sensor and a coupler used for being connected with a calibration sensor assembly. A force transmission column is arranged between the weighing sensor and the self-calibration weighing module top plate; a charging bucket supporting leg plate is fixed at the top of the self-calibration weighing module top plate; the top plate of the self-calibration weighing module is connected with the upper end of the calibration sensor assembly through a coupler. According to the utility model, not only can the universal weighing function of the charging bucket be realized, but also the weighing module with the self-calibration function can be uniquely provided to realize multi-dimensional high-precision connection with the calibrator through the coupler, and internal force balance comparison calibration of tension and pressure is carried out on the weighing module by utilizing an internal force self-balance principle and utilizing the calibrator. The calibration precision is high, the installation mode is simple, and maintenance is more convenient.

Description

Technical Field

[0001] The utility model relates to a weighing module with a self - calibration function, belonging to the technical field of weighing. Background Art

[0002] At present, for the amount of materials loaded and discharged from the storage tank in industrial scenarios, weight detection and control are usually required to meet the quality control requirements. In the prior art, the control of the material content and ratio in the storage tank is generally achieved by installing a weighing module at the bottom of the storage tank. The accuracy of the weighing module and the weighing system itself needs to be calibrated and verified regularly during the first and subsequent use processes. The prior art usually calibrates in the following ways:

[0003] Method 1: Calibration with weights:

[0004] Find a position below the bottom of the storage tank where weights can be loaded or suspended, and calibrate with weights.

[0005] Method 2: Calibration by comparing with hydraulic tensile load:

[0006] Between the outside of the storage tank structure and its installation ground, weld two lugs in advance, and install a set of loading and weighing calibration system between the two lugs for comparative calibration. The loading range of the loading and comparison calibration system is relatively wide, which can apply sufficient loading force to the weighing module and achieve a good calibration effect for full load.

[0007] Method 3: Calibration with substitutes:

[0008] Use an external independent weighing scale to weigh a certain amount of water and inject it into the storage tank successively to achieve calibration with water of a certain determined weight.

[0009] The above calibration methods for the weighing module have problems such as cumbersome calibration processes, complex structures, and low calibration accuracy. Therefore, the prior art has improved the above calibration methods. For example, in the patent "A weighing sensor calibration module" with the application number 202321414037.X, by designing a calibration sensor assembly and a calibration sensor instrument on the tank legs of the storage tank to obtain the latest weighing data and comparing it with the weighing data read by the calibrated sensor instrument, the calibrated sensor is calibrated, and it is possible to calibrate the weighing sensor on - site without removing the weighing sensor. However, during installation, an additional anchor assembly needs to be added at the bottom end of the calibration sensor assembly, and the top end of the calibration sensor assembly needs to be connected to the tank legs of the storage tank through multiple connecting pieces. The structure is relatively complex, and as the use time increases and due to the vibration of the connecting pieces, the gap between the contact surfaces of the connecting pieces will become larger and larger, affecting the calibration accuracy. Summary of the Utility Model

[0010] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art. In addition to being able to achieve the general weighing function of the material tank, it can uniquely provide a weighing module with a self-calibration function to realize multi-dimensional high-precision connection with the calibrator through a coupler. By using the principle of internal force self-balancing and using the calibrator to conduct internal force balance comparison calibration of tension and pressure on the weighing module itself, the calibration accuracy is high, the installation method is simple, and the maintenance is more convenient.

[0011] In order to solve the above technical problems, the technical solution of the present utility model is as follows:

[0012] A weighing module with a self-calibration function, which includes a weighing sensor, a self-calibration weighing module top plate arranged above the weighing sensor, a self-calibration weighing module bottom plate arranged below the weighing sensor, and a coupler for connecting the calibration sensor assembly. A force transmission column is arranged between the weighing sensor and the self-calibration weighing module top plate;

[0013] A material tank leg plate is fixed on the top of the self-calibration weighing module top plate;

[0014] The top of the self-calibration weighing module top plate is connected to the upper end of the calibration sensor assembly through a coupler, and the bottom of the self-calibration weighing module bottom plate is connected to the lower end of the calibration sensor assembly through a coupler.

[0015] Furthermore, the coupler includes a bolt flange surface, a cylindrical step, and a coupling stud arranged in sequence from left to right. A self-variable diameter elastic open sleeve is sleeved on the outer periphery of the cylindrical step.

[0016] Furthermore, mounting holes for mating connection with the coupler are provided on the peripheral side walls of the self-calibration weighing module top plate and the peripheral side walls of the self-calibration weighing module bottom plate.

[0017] Furthermore, mounting holes for mating with the coupler are provided on both the self-calibration weighing module top plate and the self-calibration weighing module bottom plate. The mounting holes include stepped holes and screw holes. The cylindrical step of the coupler is located in the stepped hole, the self-variable diameter elastic open sleeve is located between the inner wall of the stepped hole and the outer wall of the cylindrical step, and the coupling stud of the coupler is threadedly connected to the screw hole.

[0018] Furthermore, a ground mounting plate is provided at the bottom of the self-calibration weighing module bottom plate.

[0019] By adopting the above technical solution, the present utility model has the following beneficial effects:

[0020] 1. In the present utility model, an uploading force frame of a calibration sensor assembly is connected to the top plate of the self-calibrating weighing module of the weighing module, and a downward force frame of the calibration sensor assembly is connected to the bottom plate of the self-calibrating weighing module of the weighing module. Only by connecting a tension sensor between the uploading force frame and the downward force frame, a internal force self-balancing ratio calibration system for tension and pressure can be formed using the principle of internal force self-balancing. There is no need for cumbersome, inefficient, difficult, and high-cost weight calibration or substitute calibration, nor for problems such as construction difficulties and additional costs caused by installing welding lugs. The hidden danger of damage to on-site facilities and the ground is completely eliminated, the environmental hygiene condition of the weighing site of the storage tank is maintained and not affected, and the additional workload and cost of restructuring are reduced.

[0021] 2. The present utility model improves the connection and fixation structure between the tension sensor assembly and the weighing module, and fixes the force transmission frame and the weighing module through a coupler. This enables the tension sensor assembly and the self-calibrating weighing module to be connected together with high-precision positioning, close fit, high stiffness, and high strength, ensuring that the verticality of the tension sensor assembly does not change with the increase of the internal load, and ensuring that the connection components of the internal force loading ratio self-calibrating system do not produce displacement and creep, thereby affecting the calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the usage state of the self-calibrating module of the present utility model during calibration;

[0023] Figure 2 is a schematic diagram of the structure of the weighing module with self-calibrating function of the present utility model;

[0024] Figure 3 is a schematic diagram of the structure of the coupler of the present utility model;

[0025] Figure 4 is a schematic diagram of the structure of the mounting hole of the present utility model;

[0026] Figure 5 is a schematic diagram of the structure of the weighing module with self-calibrating function of the present utility model during calibration;

[0027] Figure 6 is Figure 5 a side view of;

[0028] Figure 7 is Figure 2 a side view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0030] As Figure 2 ,7 As shown in the figure, this embodiment provides a weighing module with a self-calibration function, which includes a weighing sensor 11, a self-calibration weighing module top plate 12 arranged above the weighing sensor 11, a self-calibration weighing module bottom plate 13 arranged below the weighing sensor 11, and a coupler 5 for connecting the calibration sensor assembly 2. A force transmission column 14 is arranged between the weighing sensor 11 and the self-calibration weighing module top plate 12. The leg plate 3 of the storage tank 4 is fixed to the top of the self-calibration weighing module top plate 12, and a ground mounting plate 15 is arranged at the bottom of the self-calibration weighing module bottom plate 13. The self-calibration weighing module top plate 12 is connected to the upper end of the calibration sensor assembly 2 through the coupler 5, and the self-calibration weighing module bottom plate 13 is connected to the lower end of the calibration sensor assembly 2 through the coupler 5.

[0031] As Figure 5 、 6 shown in the figure, the self-calibration weighing module top plate 12 of this embodiment is connected to the upper force transmission frame 25 of the calibration sensor assembly 2 through the coupler 5, and the self-calibration weighing module bottom plate 13 is connected to the lower force transmission frame 26 of the calibration sensor assembly 2 through the coupler 5.

[0032] The upper and lower force transmission frames of the calibration sensor assembly 2 are respectively connected and fixed to the self-calibration weighing module top plate 12 and the self-calibration weighing module bottom plate 13 through the coupler 5. Specifically: as Figure 5 、 6 shown in the figure, the bottom of the upper force transmission frame 25 is connected to the self-calibration weighing module top plate 12 through the coupler 5, the bottom of the lower force transmission frame 26 is connected to the self-calibration weighing module bottom plate 13 through the coupler 5, and there are mounting holes 6 for fixing the coupler 5 on the peripheral side walls of the self-calibration weighing module top plate 12 and the self-calibration weighing module bottom plate 13. Therefore, the self-calibration weighing module 1 can be connected to the calibration sensor assembly 2 on all four sides. Figure 5 and Figure 6 show the connection of the upper and lower force transmission frames to the left side walls of the self-calibration weighing module top plate 12 and the self-calibration weighing module bottom plate 13 respectively, and they can also be connected to other side walls around.

[0033] As Figure 3 shown in the figure, the coupler 5 of this embodiment includes a bolt flange surface 51, a cylindrical step 52, and a coupling stud 53 arranged in sequence from left to right. A self-variable-diameter elastic split sleeve 54 is sleeved on the outer periphery of the cylindrical step 52. As Figure 2 shown in the figure, mounting holes 6 for mating connection with the coupler 5 are opened on both the self-calibration weighing module top plate 12 and the self-calibration weighing module bottom plate 13. As Figure 4As shown in the figure, the mounting hole 6 includes a stepped hole 61 and a threaded hole 62. The inner wall of the stepped hole 61 is a smooth surface, and the inner wall of the threaded hole 62 is provided with threads. The cylindrical step 52 of the coupler 5 is located in the stepped hole 61, and the variable-diameter elastic split sleeve 54 is located between the inner wall of the stepped hole 61 and the outer wall of the cylindrical step 52. The coupling stud 53 of the coupler 5 is threadedly connected to the threaded hole 62.

[0034] Because when two connecting parts are connected by bolts, there will inevitably be positional errors and hole diameter errors between the contact surfaces of the two connecting parts, resulting in radial clearances on the cylindrical surfaces. During loading, the radial clearances on the cylindrical surfaces will cause displacement, reduce the positioning accuracy, and affect the calibration accuracy of the force transmission stiffness and strength. Therefore, in this embodiment, a coupler 5 is designed for connection and fixation. During installation, as the coupling stud 53 of the coupler 5 is screwed into the threaded hole 62 of the mounting hole 6, due to the existence of the opening on the variable-diameter elastic split sleeve 54, the variable-diameter elastic split sleeve 54 will be gradually tightened by the extrusion of the inner wall of the stepped hole 61. When the coupling stud 53 of the coupler 5 is fully screwed in place, the outer wall of the variable-diameter elastic split sleeve 54 is completely in contact with the inner wall of the stepped hole 61, and at the same time, the inner wall of the variable-diameter elastic split sleeve 54 is completely in contact with the cylindrical step 52 of the coupler 5. In this way, during use, it can be ensured that the contact surfaces between the upper and lower force transmission frames and the mounting hole 6 are in close contact.

[0035] In this way, the self-calibrating weighing module 1 and the calibration sensor assembly 2 can be connected together with high-precision positioning, close fit, high stiffness, and high strength, ensuring that the verticality of the calibration sensor assembly 2 does not change with the increase of the internal loading force, and ensuring that the internal force loading ratio does not cause displacement and creep of the connecting components of the self-calibration system, thereby affecting the calibration accuracy. In this way, the self-calibrating weighing module 1 can be fully installed on any side by using its own coupler, its coupler mounting hole, and the calibrator, without relying on any external mechanical features, parts, and components, and realizing the self-balanced comparison calibration of the internal force loading.

[0036] The calibration sensor assembly 2 used in this embodiment will be introduced below:

[0037] As Figure 5 、 6 shown, the calibration sensor assembly 2 of this embodiment includes a loader 21, an upper connecting fork 22, a tension sensor 23, a lower connecting fork 24, an upper force transmission frame 25, and a lower force transmission frame 26.

[0038] As Figure 5As shown, the upper end of the tension sensor 23 in this embodiment is connected to the bottom of the upper connecting fork 22. The top of the upper force transmission frame 25 is movably connected to the top of the upper connecting fork 22. The bottom of the upper force transmission frame 25 is connected to the side wall of the self-calibrating weighing module top plate 12 through a coupler 5. The loader 21 is connected to the top of the upper connecting fork 22 and moves up and down on the top of the upper connecting fork 22. The loader 21 is used to apply pressure to the top of the upper force transmission frame 25. The loader 21 is a nut, and the loader 21 is threadedly connected to the stud 221 of the upper connecting fork 22. The loader 21 is located above the chute 141 of the upper force transmission frame 25. The lower end of the tension sensor 23 in this embodiment is connected to the top of the lower connecting fork 24. The bottom of the lower connecting fork 24 is fixedly connected to the top of the lower force transmission frame 26. The bottom of the lower force transmission frame 26 is connected to the side wall of the self-calibrating weighing module bottom plate 13 through a coupler 5.

[0039] The working principle of the present utility model is as follows:

[0040] As Figure 1 、 5 、6 shows, before calibration, the self-calibrating weighing module 1 has been installed between the tank support leg plate 3 and the ground mounting plate 15. The calibration sensor assembly 2 is installed successively to ensure that there is a certain gap between the top of the upper force transmission frame 25 and the loader 21. During calibration, loading is performed by rotating the loader 21. The loader 21 gradually rotates downward and presses against the top of the upper force transmission frame 25. Continuing to rotate the loader 21 downward for loading, since the loader 21 is resisted by the top of the upper force transmission frame 25, during the process of the loader 21 continuing to rotate downward, the upper connecting fork 22 is pulled upward, thus applying an upward pulling force to the upper end of the tension sensor 23.

[0041] Then, loading is performed by rotating the loader 21, so that the tension sensor 23 gradually senses a definite and accurate pulling force, and at the same time, the weighing sensor 11 of the self-calibrating weighing module 1 gradually senses an accurate pressure of the same magnitude. This comparison pressure simulates the gravity exerted by the material in the tank 4 on the weighing sensor 11. By obtaining the definite and accurate pulling force determined by the tension sensor 23, the self-calibrating weighing module 1, that is, the weighing module with self-calibrating function of the present utility model, can be accurately calibrated.

[0042] In the above-described specific embodiments, the technical problems solved, technical solutions, and beneficial effects of the present utility model are further described in detail. It should be understood that the above description is only for the specific embodiments of the present utility model and is not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A weighing module with self-calibration function, characterized in that: It comprises a weighing sensor (11), a self-calibration weighing module top plate (12) arranged above the weighing sensor (11), a self-calibration weighing module bottom plate (13) arranged below the weighing sensor (11), and a coupler (5) for connecting a calibration sensor assembly, wherein a force transmission column (14) is arranged between the weighing sensor (11) and the self-calibration weighing module top plate (12); A tank leg plate (3) is fixed on the top of the self-calibration weighing module top plate (12); The self-calibration weighing module top plate (12) is connected to the upper end of the calibration sensor assembly through a coupler (5), and the self-calibration weighing module bottom plate (13) is connected to the lower end of the calibration sensor assembly through a coupler (5).

2. The weighing module with self-calibration function according to claim 1, characterized in that: The coupler (5) comprises a bolt flange surface (51), a cylindrical step (52) and a coupling stud (53) which are arranged in sequence from left to right. The outer periphery of the cylindrical step (52) is sleeved with a self-diameter-changing elastic open sleeve (54).

3. The weighing module with self-calibration function according to claim 2, characterized in that: The surrounding side walls of the self-calibration weighing module top plate (12) and the surrounding side walls of the self-calibration weighing module bottom plate (13) are provided with mounting holes (6) for matching and connecting with the coupler (5).

4. The weighing module with self-calibration function according to claim 3, characterized in that: The self-calibration weighing module top plate (12) and the self-calibration weighing module bottom plate (13) are both provided with a mounting hole (6) that matches the coupler (5), the mounting hole (6) includes a step hole (61) and a screw hole (62), the cylindrical step (52) of the coupler (5) is located in the step hole (61), the self-variable elastic opening sleeve (54) is located between the inner wall of the step hole (61) and the outer wall of the cylindrical step (52), and the coupling stud (53) of the coupler (5) is threadedly connected to the screw hole (62).

5. The weighing module with self-calibration function according to claim 1, characterized in that: A ground mounting plate (15) is provided at the bottom of the self-calibration weighing module bottom plate (13).

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