A weighing tank with integrated error detection structure

Abstract

This utility model relates to a weighing tank with an integrated error detection structure, comprising: a tank body; support legs, at least three of which are evenly arranged around the circumference of the tank body, each support leg having a bearing base plate and a sensor under test below it, and the sensor under test always abutting against the support leg; and an error detection structure, each error detection structure comprising a hydraulic cylinder, a standard sensor located below the hydraulic cylinder and connected to the output end of the hydraulic cylinder, and a spherical pressure head connected to the lower end of the standard sensor. The spherical pressure head has a positioning groove in its center, and the support leg extends to connect to a pressure plate. The pressure plate has positioning protrusions adapted to the positioning groove to form a groove and protrusion positioning structure. When the hydraulic cylinder pushes the standard sensor against the pressure plate, the spherical pressure head and the pressure plate are quickly and accurately positioned, avoiding pressure transmission direction deviation caused by pressure head offset. Moreover, the error detection structure in this weighing tank is simpler, improving the convenience and accuracy of error detection.

Description

Technical Field

[0001] This application relates to the field of metering equipment technology, specifically to a weighing and metering tank with an integrated error detection structure. Background Technology

[0002] Weighing and metering tanks are used in industries such as chemical and pharmaceutical. In the pharmaceutical industry, they are crucial for preparing different drug solutions at varying ratios, using sensors to weigh these solutions. The accuracy of the tank's sensors directly impacts the stability of the production process and product quality. Therefore, regular testing and calibration of the tank's sensors are necessary.

[0003] For heavy weighing tanks, if a weight calibration method is used, there is insufficient space to suspend and load large weights. Existing technologies also employ force-applying devices such as hydraulic cylinders and use standard force sensors to detect the standard force value. However, these methods generally require a clamp-type structure to connect to the tank's legs, making installation and disassembly cumbersome, and pressure transmission is easily affected by installation deviations.

[0004] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content

[0005] In view of this, embodiments of this application provide a weighing tank with an integrated error detection structure to solve at least one problem existing in the prior art, comprising:

[0006] Tanks are used to hold liquids;

[0007] Support legs are connected to the lower end of the tank body, and at least three are evenly arranged around the circumference of the tank body. Each support leg is provided with a bearing base plate and a sensor to be tested below it. The sensor to be tested is located between the bearing base plate and the support leg, and the sensor to be tested is always in contact with the support leg.

[0008] An error detection structure is provided, which corresponds to the support leg. Each error detection structure includes a hydraulic cylinder, a standard sensor located below the hydraulic cylinder and connected to the output end of the hydraulic cylinder, and a spherical pressure head connected to the lower end of the standard sensor. The spherical pressure head has a positioning groove in the center. The support leg extends and is connected to a pressure plate. The pressure plate is provided with positioning protrusions that are adapted to the positioning groove.

[0009] The control components include a servo hydraulic control system and a data acquisition and control system.

[0010] Optionally, in the weighing tank with the integrated error detection structure described above, the positioning groove and the positioning protrusion are fitted with a clearance of ≤0.1mm.

[0011] Optionally, in the weighing tank with the integrated error detection structure described above, the height of the positioning protrusion is 2-4.5mm, and the cross-section of the positioning protrusion is circular.

[0012] Optionally, in the weighing tank with the integrated error detection structure described above, the pressure plate is further provided with an arc-shaped pressure groove adapted to the spherical pressure head, the positioning protrusion is located in the arc-shaped pressure groove, the radius of curvature of the arc-shaped pressure groove is consistent with the spherical radius of the spherical pressure head, and the groove depth of the arc-shaped pressure groove is 1 / 3 of the diameter of the spherical pressure head.

[0013] Optionally, in the weighing tank with the above-mentioned integrated error detection structure, the outer surface of the spherical pressure head is covered with a polytetrafluoroethylene wear-resistant layer with a thickness of 0.2-0.3 mm, and the inner wall of the arc-shaped pressure groove is provided with a chrome-plated layer with a thickness of 0.05-0.1 mm.

[0014] Optionally, in the weighing tank with the integrated error detection structure described above, the arc-shaped pressure groove and the positioning protrusion are integrally formed.

[0015] Optionally, the weighing tank with the integrated error detection structure described above also includes a protective cover fitted over the outside of the error detection structure, the protective cover being a two-part structure.

[0016] Compared with the prior art, this application has the following advantages: by setting an error detection structure that corresponds one-to-one with the support leg, and the error detection structure includes a hydraulic cylinder, a standard sensor located below the hydraulic cylinder and connected to the output end of the hydraulic cylinder, and a spherical pressure head connected to the lower end of the standard sensor, and the spherical pressure head has a positioning groove in the center, and the pressure plate extending from the support leg is provided with matching positioning protrusions to form a groove and protrusion positioning structure, when the hydraulic cylinder pushes the standard sensor against the pressure plate, the spherical pressure head and the pressure plate are quickly and accurately positioned, avoiding the deviation in pressure transmission direction caused by pressure head offset. Moreover, the error detection structure in this metering tank is simpler, improving the convenience and accuracy of error detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a weighing tank with an integrated error detection structure as shown in this application.

[0018] Figure 2 for Figure 1 A partial schematic diagram of a weighing tank with an integrated error detection structure is shown.

[0019] Figure 3 for Figure 2 The diagram shows a spherical pressure head matching an arc-shaped pressure groove in a weighing tank with an integrated error detection structure.

[0020] Figure label:

[0021] Tank 1;

[0022] Support leg 2, bearing base plate 21, sensor under test 22, pressure plate 23, positioning protrusion 231, arc-shaped pressure groove 232;

[0023] Error detection structure 3, hydraulic cylinder 31, standard sensor 32, spherical pressure head 33, positioning groove 331;

[0024] Protective cover 4, top plate 41, side plate 42, bottom plate 43, bolt 44. Detailed Implementation

[0025] The exemplary embodiments disclosed in this application will now be described in more detail. Numerous specific details are set forth in the following description to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0026] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0027] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used here for convenience to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of devices in use and operation.

[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “ / the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “compose” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0029] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0030] Measuring tanks are mainly used for weighing and proportioning raw materials, and their weighing accuracy directly affects the performance of the final product. When using traditional flow meter detection methods to test measuring tanks, an external flow meter needs to be connected through pipelines. However, for the biopharmaceutical industry, external pipelines pose a risk of secondary contamination and also consume a large amount of purified water.

[0031] To address the aforementioned issues, this application provides a weighing tank with an integrated error detection structure. This tank not only has a simpler structure and higher error detection accuracy, but also eliminates the need for external piping, thereby preventing secondary contamination. Please refer to [reference needed]. Figures 1-3 As shown, the metering tank includes a tank body 1, support legs 2, an error detection structure 3, and a control component. The tank body 1 is used to hold the liquid. At least three support legs 2 are evenly arranged around the circumference of the tank body 1, preferably three in an equilateral triangle distribution, to ensure the stability of the tank body 1 and prevent tilting due to uneven stress. Each support leg 2 has a support base plate 21 and a sensor 22 below it. The sensor 22 is located between the support base plate 21 and the support leg 2, and it always abuts against the support leg 2. The support base plate 21 is made of high-strength steel plate to increase the contact area with the ground and improve the support stability of the support leg 2. The sensor 22 is a resistance strain gauge weight sensor, with its top fixedly connected to the bottom of the support leg 2 and its bottom fixedly connected to the support base plate 21. This sensor 22 can collect the total weight data of the metering tank and the liquid inside in real time and transmit the data to the control component.

[0032] Furthermore, each error detection structure 3 corresponds one-to-one with a support leg 2. Each error detection structure 3 includes a hydraulic cylinder 31, a standard sensor 32, and a spherical pressure head 33. The hydraulic cylinder 31 is fixed to one side of the support leg 2 by a bracket, with its output end facing vertically downwards. The standard sensor 32 is located below the hydraulic cylinder 31 and connected to its output end. The spherical pressure head 33 is connected to the lower end of the standard sensor 32, and a positioning groove 331 is provided in the center of the spherical pressure head 33. A pressure plate 23 extends from the support leg 2 and is integrally formed with the support leg 2 or fixed by welding. The pressure plate 23 is provided with positioning protrusions 231 that are adapted to the positioning groove 331.

[0033] Understandably, by cooperating with the positioning groove 331 and the positioning protrusion 231, the spherical pressure head 33 and the pressure plate 23 can be coaxially positioned without manual calibration, thus avoiding pressure transmission interference caused by pressure head offset and achieving precise positioning of the spherical pressure head 33 and the pressure plate 23.

[0034] The control components include a servo hydraulic control system and a data acquisition control system. The servo hydraulic control system is connected to the cylinder 31 via hydraulic lines and is used to control the extension and retraction speed and thrust of the cylinder 31's output end, ensuring that the standard sensor 32 presses against the pressure plate 23 with stable pressure. The data acquisition control system is electrically connected to the measured sensor 22 and the standard sensor 32 respectively. It can receive the weight data collected by the measured sensor 22 and the pressure data collected by the standard sensor 32 in real time, convert the weight data into the corresponding pressure value, compare it with the standard pressure data, and calculate the measurement error.

[0035] When it is necessary to test the sensor under test, the control component controls multiple cylinders 31 to apply a certain downward pressure to the tank 1. The standard force value applied to the tank 1 is detected by the standard sensor 32. At the same time, the force value change of the sensor under test in the tank 1 before and after the force is applied is recorded to obtain the force value detected by the sensor under test 22. The difference between the force value detected by the sensor under test 22 and the standard force value detected by the standard sensor 32 is compared to complete the detection and calibration of the sensor under test in the tank 1.

[0036] It should be noted that in this embodiment, the positioning groove 331 and the positioning protrusion 231 are in clearance fit, and the clearance is ≤0.1mm. This ensures positioning accuracy while avoiding damage to the pressure head or pressure plate 23 due to interference fit, thus ensuring the stability of pressure transmission.

[0037] Furthermore, the height of the positioning protrusion 231 is 2-4.5mm, and the cross-section of the positioning protrusion 231 is circular. Preferably, the height is 3mm, and the circular cross-section makes the contact between the positioning protrusion 231 and the positioning groove 331 more uniform, reducing local stress concentration.

[0038] Furthermore, the pressure plate 23 is also provided with an arc-shaped pressure groove 232 adapted to the spherical pressure head 33. The positioning protrusion 231 is located in the arc-shaped pressure groove 232. The radius of curvature of the arc-shaped pressure groove 232 is consistent with the spherical radius of the spherical pressure head 33, and the groove depth of the arc-shaped pressure groove 232 is 1 / 3 of the diameter of the spherical pressure head 33.

[0039] Understandably, setting up an arc-shaped pressure groove 232 and a matching spherical pressure head 33 can increase the contact area between the two, so that the pressure is transmitted evenly and avoids excessive local pressure that could cause deformation of the pressure plate 23. At the same time, controlling the groove depth can prevent the spherical pressure head 33 from being over-embedded in the pressure groove, which would affect the detection accuracy.

[0040] In this embodiment, the outer surface of the spherical indenter 33 is covered with a polytetrafluoroethylene (PTFE) wear-resistant layer with a thickness of 0.2-0.3 mm, preferably 0.25 mm; the inner wall of the arc-shaped pressure groove 232 is provided with a chromium-plated layer with a thickness of 0.05-0.1 mm, preferably 0.08 mm. The PTFE wear-resistant layer has excellent wear resistance and self-lubricating properties, which can reduce the wear of the spherical indenter 33; the chromium-plated layer can improve the hardness and wear resistance of the inner wall of the arc-shaped pressure groove 232. The combination of the two can significantly extend the service life of the error detection structure 3 and ensure long-term detection accuracy.

[0041] Furthermore, the arc-shaped pressure groove 232 and the positioning protrusion 231 are integrally formed and manufactured by forging or casting. The integrally formed structure can improve the structural strength of the pressure plate 23, avoid the risk of the positioning protrusion 231 falling off due to welding or assembly, and at the same time ensure the coaxiality of the positioning protrusion 231 and the arc-shaped pressure groove 232, thereby improving the positioning accuracy.

[0042] Since the error detection structure 3 is permanently installed on the support leg 2 to periodically detect the sensor 22 under test, in order to prevent contaminants from entering the oil cylinder 31, in this embodiment, the metering tank also includes a protective cover 4 fitted over the outside of the error detection structure 3. The protective cover 4 is a two-part structure, which is bolted to the side wall of the support leg 2. In an optional embodiment, the protective cover 4 is made of aluminum alloy, which is lightweight and high-strength, and can effectively block contaminants such as dust, oil, and water droplets from entering the error detection structure 3, preventing contaminants from affecting the normal operation of components such as the standard sensor 32 and the oil cylinder 31. At the same time, it can prevent external collisions from damaging the error detection structure 3, thereby improving the protective performance of the equipment.

[0043] More specifically, the two-part protective cover 4 includes a top plate 41, side plates 42, and a bottom plate 43. The bottom plate 43 is welded to the supporting base plate 21 to ensure connection stability. The top plate 41 has an arc-shaped edge, and the arc-shaped edges of the two top plates 41 are joined to form a through hole adapted to the support leg 2. The top plate 41, side plates 42, and bottom plate 43 are detachably connected to each other by bolts 44. It should be noted that since the supporting base plate 21 is usually buried underground, in order to facilitate the use of the error detection structure 3 at irregular intervals, in this embodiment, the side plate 42 is a two-section spliced ​​and fixed structure, and the splice is located at the lower part of the side plate. When the error detection structure 3 is needed, only the bolts 44 need to be removed to remove the upper part of the side plate; it is not necessary to disassemble the entire protective cover 4.

[0044] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.

Claims

1. A weighing tank integrated with an error detection structure, characterized in that, include: Tanks are used to hold liquids; Support legs are connected to the lower end of the tank body, and at least three are evenly arranged around the circumference of the tank body. Each support leg is provided with a bearing base plate and a sensor to be tested below it. The sensor to be tested is located between the bearing base plate and the support leg, and the sensor to be tested is always in contact with the support leg. An error detection structure is provided, which corresponds to the support leg. Each error detection structure includes a hydraulic cylinder, a standard sensor located below the hydraulic cylinder and connected to the output end of the hydraulic cylinder, and a spherical pressure head connected to the lower end of the standard sensor. The spherical pressure head has a positioning groove in the center. The support leg extends and is connected to a pressure plate. The pressure plate is provided with positioning protrusions that are adapted to the positioning groove. The control components include a servo hydraulic control system and a data acquisition and control system.

2. The integrated error detection structure weighing metering tank according to claim 1, characterized in that, The positioning groove and the positioning protrusion are fitted with a clearance of ≤0.1mm.

3. The integrated error detection structure weighing metering tank according to claim 1, characterized in that, The height of the positioning protrusion is 2-4.5mm, and the cross-section of the positioning protrusion is circular.

4. The integrated error detection structure weighing metering tank of claim 1, wherein, The pressure plate is also provided with an arc-shaped pressure groove adapted to the spherical pressure head. The positioning protrusion is located in the arc-shaped pressure groove. The radius of curvature of the arc-shaped pressure groove is the same as the spherical radius of the spherical pressure head, and the depth of the arc-shaped pressure groove is 1 / 3 of the diameter of the spherical pressure head.

5. A weighing tank integrated with error detection structure according to claim 4, characterized in that, The outer surface of the spherical pressure head is covered with a polytetrafluoroethylene wear-resistant layer with a thickness of 0.2-0.3 mm, and the inner wall of the arc-shaped pressure groove is provided with a chrome-plated layer with a thickness of 0.05-0.1 mm.

6. The integrated error detection structure weighing metering tank according to claim 4, characterized in that, The arc-shaped pressure groove and the positioning protrusion are integrally formed.

7. The integrated error detection structure weighing metering tank of claim 1, wherein, The metering tank also includes a protective cover fitted over the outside of the error detection structure, and the protective cover is a two-part structure.

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