Performance testing device of constant-force spring hanging mechanism and use method

Abstract

The invention provides a performance testing device for a constant-force spring hanging mechanism and a using method. The performance testing device comprises a controller and a testing assembly. The testing assembly comprises a fixing piece and a testing piece, the fixing piece is connected with a spring barrel of the constant force spring hanging device, the testing piece is arranged in the fixing piece, the top of the testing piece is connected with a spring pressing plate in the spring barrel of the constant force spring hanging device, and the testing piece is used for measuring the strain value on the spring pressing plate; a measuring piece is arranged on the fixing piece and is used for measuring the displacement of the spring pressing plate; wherein the measuring piece and the test piece are in communication connection with the controller. According to the device, the full-stroke operation process of the constant-force spring hanging device during use is simulated through the test assembly, the strain change values of all stage points in the round-trip full-stroke of the constant-force spring hanging device are measured by matching with strain values output by the strain sensor and taking a cold-state design position as a zero point, and the constant degree of the constant-force spring hanging device can be obtained by calculating the strain change values.

Description

Technical Field

[0001] This invention belongs to the technical field of suspension auxiliary equipment, specifically to a performance testing device and usage method for a constant force spring suspension mechanism. Background Technology

[0002] Constant force spring suspension devices are common pipe suspension devices in current thermal power generation, chemical production, and other fields. They are widely used in locations with large displacement changes and small load changes. Their principle is to maintain a constant load by relying on the compression and torque balance of the spring, absorbing the thermal displacement of the pipeline and ensuring that the pipeline operation meets design requirements. During pipeline system operation, due to the large thermal displacement at the constant force spring suspension device, when a problem occurs, the stress at the suspension point may exceed the allowable stress of the pipe material, causing pipe cracking, deformation, or other abnormalities, preventing the pipeline from reaching its normal operating conditions and affecting the operation of the entire pipeline system. Therefore, it is crucial to pay attention to and understand the performance of constant force spring suspension devices. The performance evaluation of constant force spring suspension devices should focus on the load variation range throughout its entire working stroke.

[0003] Currently, performance testing of constant force spring suspension devices is generally conducted using a hydraulic workbench as an auxiliary test. However, hydraulic workbenches cannot be moved frequently, so they are mostly used for newly manufactured or uninstalled constant force spring suspension devices. For constant force spring suspension devices that have already been installed and put into use, strain sensors are used in conjunction with handheld displays for on-site testing. However, on-site testing requires locking the suspension device and then disassembling it completely or partially, replacing the original suspension rod assembly with strain sensors and loading devices. Therefore, on-site testing is not suitable for pipeline systems that are in operation. In addition, since the suspension rod assembly must at least meet the minimum travel distance of the strain sensor and test piece, there are also limitations on the spatial conditions of the on-site test points. Summary of the Invention

[0004] To address the issues of cumbersome on-site testing procedures using strain sensors and handheld displays for existing constant force spring suspension devices, as well as the significant limitations of on-site testing space, this invention provides a performance testing device and method for a constant force spring suspension mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention proposes a performance testing device for a constant force spring suspension mechanism, including a controller and testing components; The test assembly includes a fixing component and a test component. The fixing component is connected to the spring cylinder of the constant force spring suspension device. The test component is disposed inside the fixing component. The top of the test component is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device for measuring the strain value on the spring pressure plate. The fixing component is equipped with a measuring component for measuring the displacement of the spring pressure plate; wherein the measuring component is communicatively connected to the controller and the test component.

[0006] Preferably, the fastener includes a mounting base plate, on which connecting plates are symmetrically arranged, and the connecting plates are disposed at the ends of the mounting base plate; The test piece is mounted on the mounting base plate at a position between the two connecting plates; The spring cylinder of the constant force spring suspension device is connected between the two connecting plates above the test piece.

[0007] Preferably, the connecting plate is a U-shaped plate.

[0008] Preferably, the test piece includes a bottom pad fixed on the mounting base plate, a loader is mounted on the bottom pad, a connecting pad is provided on the top of the loader, and a strain sensor is connected to the top end of the loader inside the connecting pad, the strain sensor being communicatively connected to the controller.

[0009] Preferably, the measuring component includes a measuring caliper, which is inserted into a guide ring platform. The guide ring platform is fixed to the side of the mounting base plate. An adjusting component is connected to the measuring caliper, and the measuring caliper is parallel to the connecting plate.

[0010] Preferably, the guide ring platform is provided with an observation slot, and a data reader is installed in the observation slot. The data reader is communicatively connected to the controller.

[0011] Preferably, the adjusting element is an electric telescopic rod or a pneumatic push rod.

[0012] Preferably, the controller integrates a human-computer interaction module, a processing module, a data acquisition module, a control module, and a storage module; The signal input terminal of the acquisition module is connected to the signal output terminals of the measuring device and the test device, respectively; the signal output terminal of the acquisition module is connected to the signal input terminals of the processing module and the control module, respectively; and the signal output terminal of the control module is connected to the signal input terminal of the acquisition module. The signal input terminal of the processing module is connected to the signal input terminals of the storage module and the human-computer interaction module, respectively.

[0013] This invention proposes a method for using a performance testing device for a constant force spring suspension mechanism. Based on the aforementioned performance testing device for a constant force spring suspension mechanism, the method includes the following steps: The spring cylinder of the constant force spring suspension device is fixed to the fixing component, and the top of the test piece is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device. The controller starts the test piece, loads or unloads the constant force spring suspension device, and adjusts the constant force spring suspension device to the cold state design position; The controller starts the measuring device and acquires data from it. When the acquired data is unchanged, the controller starts the test device again and loads or unloads the constant force spring suspension device, causing the constant force spring suspension device to travel a preset stroke and stop the test device. The controller starts the measuring device again and acquires data from it. When the acquired data remains unchanged, the controller controls the test device to measure the strain value on the spring pressure plate, and performs multiple measurements. The constancy is calculated based on strain values ​​obtained from multiple measurements.

[0014] Preferably, the process of calculating the constancy based on strain values ​​from multiple measurements is as follows:

[0015] in, For constant degree, The maximum value of the strain is . This represents the minimum value of the strain.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This invention proposes an adjustment auxiliary device suitable for constant force spring suspension devices. This device simulates the entire stroke operation process of the constant force spring suspension device during use through a test component. With the strain value output by the strain sensor as the zero point and the cold design position as the zero point, the strain change value at each stage point in the entire round trip is measured. The constantness of the constant force spring suspension device can be obtained by calculation. The performance of the suspension device can be accurately evaluated without affecting the working conditions and without considering space limitations.

[0017] Furthermore, this device is equipped with a guide ring platform on the measuring caliper, and a data reader is installed in the observation slot of the guide ring platform. The data reader is connected to the controller and can quickly acquire data from the measuring caliper, thereby quickly transmitting it to the controller for processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the performance testing device for a constant force spring suspension mechanism proposed in this invention; Figure 2 This is a structural block diagram of the controller in a performance testing device for a constant force spring suspension mechanism proposed in this invention; In the attached diagram: 1. Controller; 2. Test assembly; 3. Mounting base plate; 4. Connecting plate; 5. Fixture; 6. Connecting pad; 7. Loader; 8. Measuring caliper; 9. Guide ring platform; 10. Adjusting component; 11. Bottom pad. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] Constant force spring suspension devices are common pipe suspension devices in current thermal power generation, chemical production, and other fields. They are widely used in locations with large displacement changes and small load changes. Their principle is to maintain a constant load by relying on the compression and torque balance of the spring, absorbing the thermal displacement of the pipeline and ensuring that the pipeline operation meets design requirements. However, during pipeline system operation, because the thermal displacement at the constant force spring suspension device is generally large, when a problem occurs, the stress in the pipeline at the suspension point may exceed the allowable stress of the pipe material, causing pipe cracking, deformation, or other abnormalities, preventing the pipeline from reaching its normal operating conditions and affecting the operation of the entire pipeline system.

[0026] Therefore, it is crucial to pay attention to and understand the performance of constant force spring suspension devices. According to relevant regulations and standards (NB / T47038, DL / T1113), the performance evaluation of constant force spring suspension devices focuses on the load variation range, i.e., the constantness, throughout its entire working stroke. Currently, performance testing of constant force spring suspension devices is generally conducted using a hydraulic workbench as an auxiliary test. However, hydraulic workbenches cannot be moved frequently, so they are mostly used for newly manufactured or uninstalled constant force spring suspension devices. For constant force spring suspension devices that have already been installed and put into use, strain sensors can be used with handheld displays for on-site testing. However, on-site testing requires locking the suspension device and then disassembling it completely or partially, replacing the original suspension rod assembly with strain sensors and loading devices. Therefore, on-site testing is not suitable for operating pipeline systems. In addition, since the suspension rod assembly must at least meet the minimum stroke requirements of the sensor and test piece, there are also limitations on the spatial conditions of the on-site test points.

[0027] To address the above problems, this invention proposes a performance testing device for a constant force spring suspension mechanism, such as... Figure 1 As shown, it includes controller 1 and test component 2; Test component 2 includes a fixing component and a test component. The fixing component is connected to the spring cylinder of the constant force spring suspension device. The test component is set inside the fixing component. The top of the test component is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device for measuring the load on the spring pressure plate. A measuring component is set on the fixing component for measuring the displacement of the spring pressure plate. The measuring component and the test component are communicatively connected to the controller 1. In this device, the spring cylinder of the constant force spring suspension device is fixed to the spring cylinder by fasteners. Depending on whether the spring cylinder is horizontal or vertical, it is fixed in the corresponding horizontal or vertical position. At this time, the top pad inside the spring cylinder is connected to the spring pressure plate. When the test piece is activated, the spring pressure plate can be compressed or stretched through the top pad. Due to the mechanical structure and constant force characteristics of the constant force spring suspension device, the load output on its rod should remain constant or change only slightly. Therefore, it has no impact on the operating pipeline system. However, the displacement indicator pointer of the suspension device will move accordingly. The test component 2 simulates the entire stroke operation process of the constant force spring suspension device during use. With the strain value output by the strain sensor and the cold design position as the zero point, the strain change value at each stage point in its round trip is measured. The constantness of the constant force spring suspension device can be obtained by calculation. The performance of the suspension device can be accurately evaluated without affecting the working conditions and without considering space limitations.

[0028] In this embodiment, the fixing component includes a mounting base plate 3, and connecting plates 4 are symmetrically arranged on the upper end face of the mounting base plate 3, and the lower end of the connecting plate 4 is fixed to the end of the mounting base plate 3; the test piece is installed on the mounting base plate 3 at the position between the two connecting plates 4; the spring cylinder of the constant force spring suspension device is connected between the two connecting plates 4 above the test piece.

[0029] Preferably, a fixing member 5 is screwed onto the connecting plate 4 near its top end. The fixing member 5 is a fixing screw, which enables quick connection and disassembly between the connecting plate 4 and the spring cylinder of the constant force spring suspension device.

[0030] Preferably, the connecting plate 4 is a U-shaped plate, and the U-shaped openings of the two U-shaped plates are arranged opposite each other.

[0031] In this embodiment, the test piece includes a bottom pad 11 fixed on the mounting base plate 3, a loader 7 is mounted on the bottom pad 11, a connecting pad 6 is provided on the top of the loader 7, and a strain sensor is connected to the top end of the loader 7 inside the connecting pad 6. The strain sensor is communicatively connected to the controller 1.

[0032] In this embodiment, the measuring component includes a measuring caliper 15, which is inserted into the guide ring platform 9. The guide ring platform 9 is fixed to the side of the mounting base plate 3, and the measuring caliper 15 is parallel to the connecting plate 4. An adjusting component 10 is connected to the measuring caliper 15, which is an electric telescopic rod or a pneumatic push rod.

[0033] In this embodiment, an observation slot is provided on the guide ring platform 9, and a data reader is installed in the observation slot. The data reader is communicatively connected to the controller. The data reader can quickly acquire the data on the measuring caliper 15 and then quickly transmit it to the controller 1 for processing.

[0034] In this embodiment, as Figure 2 As shown, the controller 1 integrates a human-machine interaction module, a processing module, a data acquisition module, a control module, and a storage module; wherein, the signal input terminal of the data acquisition module is connected to the signal output terminal of the measuring device and the test device respectively, the signal output terminal of the data acquisition module is connected to the signal input terminal of the processing module and the control module respectively, and the signal output terminal of the control module is connected to the signal input terminal of the data acquisition module; The signal input terminals of the processing module are connected to the signal input terminals of the storage module and the human-computer interaction module, respectively.

[0035] This invention also proposes a method for using a performance testing device for a constant force spring suspension mechanism. Based on the above-mentioned performance testing device for a constant force spring suspension mechanism, the method includes the following steps: The spring cylinder of the constant force spring suspension device is fixed to the fixing component, and the top of the test piece is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device. The controller starts the test piece, loads or unloads the constant force spring suspension device, and adjusts the constant force spring suspension device to the cold state design position; The controller starts the measuring device and acquires data from it. When the acquired data is 0, the controller starts the test device again and loads or unloads the constant force spring suspension device, causing the constant force spring suspension device to run at the preset stroke and stop the test device. The controller 1 starts the measuring device again and acquires data from it. When the acquired data remains unchanged, the controller 1 controls the test device to measure the strain value on the spring pressure plate, and measures it multiple times. The constancy is calculated based on strain values ​​obtained from multiple measurements.

[0036] Preferably, the process of calculating the constancy based on strain values ​​from multiple measurements is as follows:

[0037] in, For constant degree, The maximum value of the strain is . This represents the minimum value of the strain.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A performance testing device for a constant force spring suspension mechanism, characterized in that, Includes a controller (1) and a test component (2); The test component (2) includes a fixing part and a test piece. The fixing part is connected to the spring cylinder of the constant force spring suspension device. The test piece is set inside the fixing part. The top of the test piece is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device for measuring the strain value on the spring pressure plate. The fixing component is provided with a measuring component for measuring the displacement of the spring pressure plate; wherein the measuring component is communicatively connected to the controller (1) with the test component.

2. The performance testing device for a constant force spring suspension mechanism according to claim 1, characterized in that, The fastener includes a mounting base plate (3), on which connecting plates (4) are symmetrically arranged, and the connecting plates (4) are disposed at the ends of the mounting base plate (3); The test piece is installed on the mounting base plate (3) at a position between the two connecting plates (4); The spring cylinder of the constant force spring suspension device is connected between the two connecting plates (4) above the test piece.

3. The performance testing device for a constant force spring suspension mechanism according to claim 2, characterized in that, The connecting plate (4) is a U-shaped plate.

4. The performance testing device for a constant force spring suspension mechanism according to claim 2, characterized in that, The test piece includes a bottom pad (11) fixed on the mounting base plate (3), a loader (7) is mounted on the bottom pad (11), a connecting pad (6) is provided on the top of the loader (7), and a strain sensor is connected to the top end of the loader (7) inside the connecting pad (6), and the strain sensor is communicatively connected to the controller (1).

5. The performance testing device for a constant force spring suspension mechanism according to claim 3, characterized in that, The measuring component includes a measuring caliper (15), which is inserted into a guide ring platform (9). The guide ring platform (9) is fixed to the side of the mounting base plate (3). An adjusting component (10) is connected to the measuring caliper (15), and the measuring caliper (15) is parallel to the connecting plate (4).

6. The performance testing device for a constant force spring suspension mechanism according to claim 5, characterized in that, An observation slot is provided on the guide ring platform (9), and a data reader is installed in the observation slot. The data reader is communicatively connected to the controller.

7. The performance testing device for a constant force spring suspension mechanism according to claim 5, characterized in that, The adjusting component (10) is an electric telescopic rod or a pneumatic push rod.

8. The performance testing device for a constant force spring suspension mechanism according to claim 1, characterized in that, The controller (1) integrates a human-computer interaction module, a processing module, a data acquisition module, a control module, and a storage module. The signal input terminal of the acquisition module is connected to the signal output terminals of the measuring device and the test device, respectively; the signal output terminal of the acquisition module is connected to the signal input terminals of the processing module and the control module, respectively; and the signal output terminal of the control module is connected to the signal input terminals of the measuring device and the test device, respectively. The signal input terminal of the processing module is connected to the signal input terminals of the storage module and the human-computer interaction module, respectively.

9. A method of using a performance testing device for a constant force spring suspension mechanism, based on the performance testing device for a constant force spring suspension mechanism according to any one of claims 1-8, characterized in that, Includes the following steps: The spring cylinder of the constant force spring suspension device is fixed to the fixing component, and the top of the test piece is connected to the spring pressure plate in the spring cylinder of the constant force spring suspension device. The controller (1) starts the test piece, loads or unloads the constant force spring suspension device, and adjusts the constant force spring suspension device to the cold state design position; The controller (1) starts the measuring device and acquires the data in the measuring device. When the acquired data is 0, the controller (1) starts the test device again and loads or unloads the constant force spring hanging device, so that the constant force spring hanging device runs at the preset stroke and stops the test device from running. The controller (1) starts the measuring device again and acquires the data in the measuring device. When the acquired data is unchanged, the controller (1) controls the test device to measure the strain value on the spring pressure plate and measures it multiple times. The constancy is calculated based on strain values ​​obtained from multiple measurements.

10. The method of using the performance testing device for a constant force spring suspension mechanism according to claim 9, characterized in that, The process of obtaining the constancy based on strain numerical calculations from multiple measurements is as follows: in, For constant degree, The maximum value of the strain is . This represents the minimum value of the strain.

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