Flange structure with torque detection function, driving device and stirrer

Abstract

The utility model relates to a flange structure with torque detection function, drive device and blender, its technical scheme key point is including first flange piece, second flange piece and strain gauge, first flange piece includes first plug interface, second flange piece includes second plug interface, first flange piece abuts second flange piece, and the first flange piece includes the first plug interface, the second plug interface includes the second plug interface, and the strain gauge includes the first plug interface and the second plug interface. According to the utility model, the strain gauge is utilized to detect the relative torsional deformation structure of the flange, the torque measurement function is integrated into the standard flange connecting piece, the core principle is that the flange generates tiny relative rotation by utilizing the torque, and the relative torsional deformation of the flange is detected by utilizing the strain gauge. According to the structure, the pre-tightening force state can be monitored in real time, and the structure is particularly suitable for key connection points with high requirements for safety, environmental protection and continuous operation.

Description

Technical Field

[0001] The utility model relates to a flange structure, more particularly to a flange structure with a torque detection function. Background Art

[0002] The flange structure with torque detection function can monitor the bolt preload, that is, the equivalent torque, in real time. The traditional flange relies on the initial installation torque and cannot sense the changes in preload during operation, such as relaxation or overload, and cannot detect abnormalities in time. In the actual use environment, short-term and drastic changes in the local environment are unpredictable. The warning measures in the existing technology for insufficient preload (such as leakage) or excessive preload (such as bolt damage, flange deformation) are usually disassembly inspections during routine inspections, and there is no early warning function. Therefore, a flange structure with torque detection function is needed. This structure can monitor the preload status in real time and is particularly suitable for key connection points with high requirements for safety, environmental protection, and continuous operation.

[0003] In view of the above reasons, how to monitor the preload state in real time is exactly the issue considered in this application. Utility Model Content

[0004] In view of the shortcomings of the existing technology, a flange structure with a torque detection function is provided, which can monitor the preload state in real time.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: a flange structure with a torque detection function, comprising a first flange, a second flange and a strain gauge, the first flange comprising a first plug interface, the second flange comprising a second plug interface, the first flange abutting the second flange, and the first plug interface being arranged corresponding to the second plug interface, and the two ends of the strain gauge being respectively installed on the first plug interface and the second plug interface.

[0006] In summary, the above technical solution has the following beneficial effects: The first and second flanges are mounted on two flange plates, respectively, and are driven to rotate by the two flange plates. When torque is transmitted between the first and second flange plates, the flange structure undergoes slight torsional deformation, which results in a slight relative rotation angle between the two flanges. The strain gauge is fixed at both ends to the first and second plug-in interfaces of the first and second flange plates, respectively. These two plug-in interfaces are aligned when the flange structure is in a torque-free state. When the two flange plates rotate relative to each other due to the transmitted torque, the distance between the first and second plug-in interfaces changes, directly causing the strain gauge itself to be stretched or compressed, thereby causing deformation. A strain gauge is a resistive sensor whose resistance changes linearly with its mechanical deformation (strain). When the strain gauge is stretched, its resistance increases, and when it is compressed, its resistance decreases. The change in the strain gauge resistance can then be directly detected using an additional device such as a measuring bridge circuit and converted into a voltage signal. The magnitude of this voltage signal is proportional to the strain of the strain gauge.

[0007] The torque detection function is directly built into the flange structure, eliminating the need for additional complex torque sensors or couplings. The compact structure saves space, lowers the overall center of gravity of the equipment, and improves stability. The strain gauge does not directly participate in power transmission, but only senses deformation, which minimally interferes with the original power transmission path. This maintains the primary function of the flange connection and can also monitor the torque transmitted by the flange in real time. The core component is the strain gauge, which can be retrofitted to existing flange structures, making it relatively easy to replace damaged strain gauges.

[0008] This utility model utilizes strain gauges to detect the relative torsional deformation of flanges and integrates torque measurement into standard flange connections. The core principle is to use torque to cause the flanges to produce a small relative rotation, thereby causing the strain gauges fixed to the two flanges to deform and change their resistance. Ultimately, the torque value is calculated through electrical signals. This structure can monitor the preload state in real time and is particularly suitable for critical connection points with high requirements for safety, environmental protection, and continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of the three-dimensional structure of the driving device;

[0010] Figure 2 is a top view of the first flange;

[0011] Figure 3 is a top view of the second flange;

[0012] Figure 4 It is a cross-sectional view of the second flange.

[0013] Reference numerals: 1, first flange; 2, second flange; 3, strain gauge;

[0014] 11. First plug interface; 12. Accommodation slot; 13. First threaded hole;

[0015] 21. Second plug interface; 22. Pressing piece; 23. Annular groove; 24. Second threaded hole. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0017] Reference Figure 1-4 As shown, the flange structure with torque detection function includes a first flange 1, a second flange 2 and a strain gauge 3. The first flange 1 includes a first plug interface 11, the second flange 2 includes a second plug interface 21, the first flange 1 abuts against the second flange 2, and the first plug interface 11 is arranged corresponding to the second plug interface 21, and the two ends of the strain gauge 3 are respectively installed on the first plug interface 11 and the second plug interface 21.

[0018] The first and second flanges 1 and 2 are mounted on two flanges, respectively, and driven for rotation by the respective flanges. When torque is transmitted between the first and second flanges 1 and 2, the flange structure undergoes slight torsional deformation, resulting in a slight relative rotation angle between the two flanges. The strain gauge 3 is secured at both ends to the first and second connectors 11 and 21 of the first and second flanges 2, respectively. These connectors are aligned when the flange structure is torque-free. When the two flanges rotate relative to each other due to torque transmission, the distance between the first and second connectors 11 and 21 changes, directly causing the strain gauge 3 to stretch or compress, thus deforming. The strain gauge 3 is a resistive sensor whose resistance changes linearly with its mechanical deformation (strain). When the strain gauge 3 is stretched, its resistance increases, and when it is compressed, its resistance decreases. This change in resistance can then be directly detected using an additional device, such as a measuring bridge circuit, and converted into a voltage signal. The magnitude of this voltage signal is proportional to the strain applied to the strain gauge 3.

[0019] The torque detection function is directly built into the flange structure, eliminating the need for additional complex torque sensors or couplings. The structure is compact, space-saving, and reduces the overall center of gravity of the equipment, improving stability. The strain gauge 3 does not directly participate in power transmission, but only senses deformation, minimizing interference with the original power transmission path. This maintains the primary function of the flange connection while also enabling real-time monitoring of the torque transmitted by the flange. The core component is the strain gauge 3, which can be retrofitted onto existing flange structures, making it relatively easy to replace damaged strain gauges.

[0020] This utility model utilizes a strain gauge 3 to detect the relative torsional deformation of the flanges, integrating the torque measurement function into a standard flange connection. The core principle is to use torque to cause the flanges to produce a small relative rotation, thereby causing the strain gauge 3 fixed on the two flanges to deform and change its resistance. Ultimately, the torque value is calculated through the electrical signal. This structure can monitor the preload state in real time and is particularly suitable for critical connection points with high requirements for safety, environmental protection, and continuous operation.

[0021] Furthermore, the first flange 1 further includes a receiving groove 12 , which is communicated with the first plug-in port 11 , and is used to receive the strain gauge 3 .

[0022] Furthermore, the second flange 2 further includes a pressing piece 22, which is disposed corresponding to the receiving groove 12;

[0023] When the compression plate 22 is accommodated in the accommodating groove 12 , the compression plate 22 , the inner wall of the accommodating groove 12 , the inner wall of the first plug-in port 11 and the inner wall of the second plug-in port 21 all abut against the strain gauge 3 and are used to limit the movement of the strain gauge 3 .

[0024] Furthermore, an annular groove 23 is provided on the second flange 2 .

[0025] The accommodating groove 12 provides a protected space to accommodate the main part of the strain gauge 3. When installing the overall flange structure, the fragile strain gauge 3 can be sunk into the groove in advance to avoid direct physical impact, friction or contamination during assembly and use. The shape of the accommodating groove 12 limits the movement of the strain gauge 3 in its plane. The accommodating groove 12 is connected to the first plug interface 11, ensuring that the lead or solder point at one end of the strain gauge 3 can smoothly pass through the first plug interface 11 and be connected to the external circuit. After the flange structure is assembled, the compression piece 22 actively compresses and fixes the strain gauge 3 in the accommodating groove 12. After the compression piece 22 is inserted, its surface works together with the inner wall of the accommodating groove 12, the inner wall of the first plug interface 11, and the inner wall of the second plug interface 21 to compress the strain gauge 3 from multiple directions.

[0026] The annular groove 23 increases local strain, improving the sensor's sensitivity and output signal strength. The groove 23, machined into the second flange 2, significantly reduces the cross-sectional area and cross-sectional stiffness of this annular region. When the flange transmits torque, the entire flange structure undergoes torsional deformation. Under the action of torque, this thin-walled area with the groove 23 is more susceptible to bending deformation, resulting in a local strain value far greater than that in the thicker areas of the flange. The strain gauge 3 attached to the surface of this groove 23 region is significantly amplified, so the strain sensed by the strain gauge 3 is greater, and its resistance change is also greater, resulting in a stronger electrical signal output. This makes it easier for the measurement system to detect the signal, improving the signal-to-noise ratio and measurement sensitivity.

[0027] Furthermore, a first threaded hole 13 penetrating the receiving groove 12 is provided on the first flange 1 , and a second threaded hole 24 penetrating the pressing plate 22 is provided on the second flange 2 . The first threaded hole 13 and the second threaded hole 24 are correspondingly arranged.

[0028] The above describes a flange structure with a torque detection function. The flange structure with a torque detection function can be used in a drive device and includes the following technical solutions:

[0029] The driving device comprises a flange structure with a torque detection function, a driving end and a frame. The flange structure with a torque detection function is installed between the driving end and the frame.

[0030] The driving end can be a motor, reducer, pneumatic motor, hydraulic motor, etc.

[0031] The above describes a driving device that can be used in a stirrer and includes the following technical solutions:

[0032] The mixer comprises a paddle, a driving shaft and a driving device. The paddle is fixedly connected to the driving shaft, and the driving shaft is fixedly connected to the driving end of the driving device.

[0033] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A flange structure with a torque detection function, characterized in that: It includes a first flange, a second flange and a strain gauge. The first flange includes a first plug interface, the second flange includes a second plug interface, the first flange abuts the second flange, and the first plug interface is set corresponding to the second plug interface, and the two ends of the strain gauge are respectively installed on the first plug interface and the second plug interface.

2. The flange structure with torque detection function according to claim 1, characterized in that: The first flange further includes a receiving groove, which is communicated with the first plug-in interface and is used to receive a strain gauge.

3. The flange structure with torque detection function according to claim 2, characterized in that: The second flange also includes a pressing piece, and the pressing piece is arranged corresponding to the accommodating groove; When the compression plate is accommodated in the accommodating groove, the compression plate, the inner wall of the accommodating groove, the inner wall of the first plug interface and the inner wall of the second plug interface all abut against the strain gauge and are used to limit the movement of the strain gauge.

4. The flange structure with torque detection function according to claim 3, characterized in that: The second flange is also provided with an annular groove.

5. The flange structure with torque detection function according to claim 4, characterized in that: The first flange is provided with a first threaded hole penetrating the accommodating groove, and the second flange is provided with a second threaded hole penetrating the pressing plate. The first threaded hole and the second threaded hole are arranged correspondingly.

6. A driving device, characterized in that: The invention comprises a frame, a driving end and a flange structure with a torque detection function as claimed in any one of claims 1 to 5, wherein the flange structure with a torque detection function is installed between the driving end and the frame.

7. A mixer, characterized in that: The invention comprises a paddle, a drive shaft and a drive device as claimed in claim 6, wherein the paddle is fixedly connected to the drive shaft, and the drive shaft is fixedly connected to the drive end of the drive device.

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