Support slippage load measuring device and determining method

Abstract

The invention relates to a support slippage load measuring device, which comprises a main support, a corbel, a connecting device, a pull arm and a clamping force sensor, and is characterized in that the connecting device comprises two opposite connecting surfaces and a clamping part, the two opposite connecting surfaces are in contact with the main support, and the clamping part is in contact with the main support; the clamping component applies clamping force between the two connecting surfaces and the main support, and the connecting device is connected with the corbel; the pulling arm is connected with the supporting arm, and the pulling arm is configured to be directly or indirectly connected to an external loading device; the clamping force sensor is located inside or around the connecting device to measure the clamping force. The slip load measuring device can be divided into a double-side slip load measuring device, a single-side slip load measuring device and a spacing-adjustable slip load measuring device, and is simple in structure, easy to process and manufacture, and relatively convenient to install and use. The invention also relates to a bracket slippage load determination method which is used for determining the slippage load of the bracket slippage load measurement device.

Description

Technical Field

[0001] The present invention relates to the technical field of cable trays, and specifically relates to a support slip load measuring device and a determination method therefor. Background Art

[0002] The cable trays in nuclear power plants are important equipment for supporting and protecting cable lines in nuclear power plants, and are composed of three parts: trays, bracket arms, and square steel supports. The cable trays in nuclear power plants must have a certain strength, stiffness, stability, and good seismic resistance.

[0003] The connection method between the bracket arms and the square steel of the cable tray adopts a slip friction system with pre-tightening force installation. To ensure the safety and integrity requirements of the cable tray support system under seismic conditions, it is necessary for the slip friction system to provide sufficient slip load. The cable trays are generally made of steel, and in order to prevent corrosion, a galvanizing process is carried out on the surface of carbon steel. The surface characteristics of the zinc layer are different from those of the steel surface, and the surface slip coefficient is greatly affected by the galvanizing process, the thickness of the zinc layer, etc. Therefore, the slip load cannot be accurately calculated and analyzed. In addition, different installation methods, different square steels and bracket arm bottom plates, and different installation pre-tightening forces will also affect the magnitude of the slip load.

[0004] To solve the above problems, some technical solutions have been disclosed in the prior art. For example, CN107036797B discloses a test device for measuring bolt loosening under transverse load, belonging to the field of vibration test devices, which includes a first clamping plate, a second clamping plate, and a pressure sensor connected in sequence from left to right; the upper part of the first clamping plate is a cylinder, and the lower part is a flat plate with a first through hole in the center of the flat plate; the lower part of the second clamping plate is a cylinder, and the upper part is a flat plate with a second through hole in the center of the flat plate, and a second circular groove is provided on the right side of the flat plate, and a pressure sensor with a through hole in the center is embedded in the second circular groove. It also includes a nut rotation angle measurement bracket, an encoder, a bolt positioning ring, and a wear-reducing gasket. This prior art drives the first clamping plate and the second clamping plate to reciprocate through a hydraulic fatigue testing machine, transfers the load of the vibration source to the test bolt and the test nut, realizes continuous adjustment of the transverse loading amplitude and frequency, and can monitor the loosening characteristics (clamping force, nut rotation angle), transverse load, and displacement of the bolt in real time. Another example is that CN203083912U discloses a test device for measuring the static and dynamic sliding friction coefficients of materials under different pressures, including: a main frame using a four-column rigid frame structure, a vertical loading system, a horizontal loading system, and a computer control and acquisition system. This prior art adopts the method of double-contact surface sliding, the horizontal loading system provides the normal pressure on the sample contact surface, the vertical loading system applies the sliding load, and the computer control and acquisition system controls the loading and collects test data; by recording the maximum static load before sliding and the sliding load after sliding, and combining the applied normal pressure on the contact surface, the static sliding friction coefficient and the dynamic sliding friction coefficient can be obtained. Since the normal pressure on the contact surface is applied through the loading device, the magnitude of the normal pressure on the contact surface can be adjusted as needed, thereby realizing the measurement of the static sliding friction coefficient and the dynamic sliding friction coefficient of materials under different pressures.

[0005] However, these existing devices cannot completely solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to solve the above technical problems.

[0007] To better measure the magnitude of the sliding load of a cable tray, on the one hand, the present invention provides a sliding load measurement device, including a main support, a support arm, a connecting device, a pulling arm, and a clamping force sensor. The connecting device includes two opposite connecting surfaces and a clamping component. The two opposite connecting surfaces are in contact with the main support, and the clamping component applies a clamping force between the two connecting surfaces and the main support. The connecting device is connected to the support arm; the pulling arm is connected to the support arm and is configured to be directly or indirectly connected to an external loading device; the clamping force sensor is located inside or around the connecting device to measure the clamping force.

[0008] Further, the main support has two bearing surfaces, and the two bearing surfaces are respectively in contact with the two connecting surfaces of the connecting device.

[0009] Further, the loading direction of the bracket slip load measuring device is parallel to the bearing surface and the connecting surface.

[0010] Further, the support arm is perpendicular to the main support.

[0011] Further, the connecting device includes two connecting plates. Both of the two connecting plates are perpendicular to the support arm, both of the two connecting plates are parallel to the bearing surface of the main support, the two connecting plates are parallel to each other, and the two opposite connecting surfaces are the surfaces of the two connecting plates in contact with the main support.

[0012] Further, the clamping member includes a bolt and a nut. The bolt passes through the two connecting plates, and the bolt is connected to the nut to apply a clamping force to the two connecting plates. The clamping force sensor is located between the nut and the connecting plate.

[0013] Further, the pulling arm is perpendicular to the support arm and parallel to the main support.

[0014] Further, a displacement sensor is further included. The fixed point and the measuring point of the displacement sensor are respectively located on the main support and the connecting device, or the fixed point and the measuring point of the displacement sensor are respectively located on the connecting device and the main support.

[0015] Further, a loading force sensor is further included. The loading force sensor is located between the bracket slip load measuring device and the external loading device.

[0016] Further, a time synchronization collector is further included. The clamping force sensor, the displacement sensor and the loading force sensor are connected to the same time synchronization collector.

[0017] Further, a data processing system is further included. The data processing system processes the information collected by the clamping force sensor, the displacement sensor and the loading force sensor.

[0018] Further, two support arms are included. The two support arms are respectively on both sides of the main support, and one ends of the two support arms are respectively connected to the two connecting plates of the connecting device.

[0019] Further, two pulling arms are included. One ends of the two pulling arms are respectively connected to the two support arms.

[0020] Further, a cross beam is further included. Both ends of the cross beam are respectively connected to the other ends of the two pulling arms.

[0021] Further, there are multiple pairs of connection points on the support arm and the cross beam. The pulling arm can be positioned at any one of the multiple pairs of connection points. The pair of connection points are respectively located on the support arm and the cross beam, and the connection line of the two connection points in the pair of connection points is in the vertical direction.

[0022] Further, it further includes a connection head, which is connected to the other end of the pulling arm, and the connection head is located on the acting line of the loading force.

[0023] Further, it further includes a connection head, which is connected to the cross beam, and the connection head is located on the acting line of the loading force.

[0024] On the other hand, the present invention proposes a method for determining the slip load of a bracket, which is used for the bracket slip load measuring device, and includes: Step 1, adjusting the clamping component and the applied clamping force; Step 2, starting the external loading device; Step 3, determining the slip load, where the slip load is the force applied by the external loading device when the relative displacement between the connecting device and the main support reaches the displacement threshold; Step 4, selecting the slip load determined in Step 3 to determine the design value of the slip load.

[0025] Further, a pre-tension is applied to the bracket slip load measuring device before performing Step 2.

[0026] Further, the bracket slip load measuring device further includes a displacement sensor, and Step 1 further includes installing the displacement sensor.

[0027] Further, the bracket slip load measuring device further includes a loading force sensor, and Step 1 further includes installing the loading force sensor.

[0028] Further, the bracket slip load measuring device further includes a time synchronization collector, and Step 1 further includes connecting the clamping force sensor, the displacement sensor and the loading force sensor to the same time synchronization collector to synchronize the data signals of the clamping force sensor, the loading force sensor and the displacement sensor.

[0029] Further, the bracket slip load measuring device only has one support arm, the connecting device includes two connecting plates, and the two displacement sensors respectively measure the sliding displacements of the two connecting plates. The force applied by the external loading device when the connecting plate on the side close to the external loading device reaches the displacement threshold is used as the design value of the slip load.

[0030] Applying the above technical solutions of the present invention, at least the following technical effects are achieved:

[0031] 1. The present invention can determine different surface slip coefficients and the magnitudes of slip loads under different installation forms and clamping force loads. The types of the present invention can be divided into bilateral, unilateral, and adjustable-spacing slip load measuring devices. Moreover, the structure of the present invention is simple, easy to process and manufacture, and convenient and fast to install and use.

[0032] 2. The measuring point and the fixed point of the displacement sensor of the present invention are respectively on the connecting device and the main support, excluding the influence of the elastic deformation of other structural members and accurately reflecting the relative slip between the circular connecting plate and the main support 1. Two displacement sensors are respectively arranged on both sides of the main support. In particular, for unilateral tensile slip, the magnitudes of the primary slip load and the secondary slip load can be accurately judged.

[0033] 3. Real-time monitoring of the bolt pre-tightening force load. A clamping force sensor is installed at the end of the bolt to monitor the magnitude of the bolt pre-tightening force and the change of the bolt clamping force during the slip process in real time. A force sensor is added at the tensile position, and then all the sensors are connected to a time synchronization collector for data time synchronization acquisition and analysis work, analyzing the slip load trend and being able to accurately measure the magnitude of the slip load.

[0034] 4. The present invention can achieve the time synchronization of data. In order to accurately analyze the slip load, the calibration points of the slip load are determined through vibration and anti-seismic experiments; the magnitudes of the primary-side slip and secondary-side slip loads of the unilateral tensile slip can be analyzed; and the change trend of the bolt pre-tightening force magnitude during the slip process can be synchronously analyzed.

[0035] 5. The present invention can quickly measure the loads and material surface characteristics under different structural forms and stress states, provide a reference for design, be simple to operate, and achieve rapid and accurate measurement.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0038] Figure 1 A data acquisition system diagram of the slip load measuring device in an embodiment is shown;

[0039] Figure 2 A relative displacement diagram of the connecting device and the main support under vibration tests is shown;

[0040] Figure 3 A structural schematic diagram of the bilateral slip load measuring device is shown;

[0041] Figure 4 showed the structural schematic diagram of the unilateral slip load measuring device;

[0042] Figure 5 showed the structural schematic diagram of the adjustable-spacing slip load measuring device;

[0043] Figure 6 showed the layout diagram of the displacement sensor in an embodiment;

[0044] Figure 7 showed the layout diagram of the bolt clamping force sensor in an embodiment;

[0045] Figure 8 showed the data access diagram of the loading force sensor in an embodiment;

[0046] Figure 9 showed the slip load calibration diagram during bilateral tension in an embodiment;

[0047] Figure 10 showed the slip load calibration diagram during unilateral tension in an embodiment.

[0048] Reference numerals: 1, main support; 2, support arm; 3, connecting device; 4, cross beam; 5, pulling arm; 6, connecting head; 7, clamping force sensor; 8, loading force sensor; 9, displacement sensor. Detailed implementation manners

[0049] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0050] The following further describes the present invention in detail with specific embodiments, and these embodiments should not be construed as limiting the scope claimed by the present invention.

[0051] Embodiment 1

[0052] According to one aspect of the present invention, as Figure 3 , Figure 4 and Figure 7As shown in the figure, a slip load measuring device is proposed, which includes a main support 1, a support arm 2, a connecting device 3, a pulling arm 5 and a clamping force sensor 7. The connecting device 3 includes two opposite connecting surfaces and a clamping component. The two opposite connecting surfaces are in contact with the main support 1, and the clamping component applies a clamping force between the two connecting surfaces and the main support. The connecting device 3 is connected to the support arm 2; the pulling arm 5 is connected to the support arm 2, and the pulling arm is configured to be directly or indirectly connected to an external loading device; the clamping force sensor 7 is located inside or around the connecting device 3 to measure the clamping force.

[0053] The main support 1 has two bearing surfaces, and the two bearing surfaces are respectively in contact with the two connecting surfaces of the connecting device 3. The loading direction of the bracket slip load measuring device is parallel to the bearing surface and the connecting surface. Specifically, a single hollow square steel is used as the main support, and the bottom of the main support 1 is an anchor plate and bolts. The slip load measuring device is fixed on the foundation through the anchor plate and bolts at the bottom of the main support 1. The foundation can be a wall, a roof or the ground, etc.

[0054] The support arm 2 is perpendicular to the main support 1. The connecting device 3 includes two connecting plates 31. Both of the two connecting plates 31 are perpendicular to the support arm 2, and both of the two connecting plates 31 are parallel to the bearing surface of the main support 1. The two connecting plates 31 are parallel to each other. The two opposite connecting surfaces are the surfaces of the two connecting plates 31 that are in contact with the main support 1. The clamping component includes a bolt 32 and a nut 33. The bolt 32 passes through the two connecting plates 31, and the bolt 32 is connected to the nut 33 to apply a clamping force to the two connecting plates 31. The clamping force sensor is located between the nut 33 and the connecting plate 31. The pulling arm 5 is perpendicular to the support arm 2, and the pulling arm 5 is parallel to the main support 1.

[0055] In other embodiments, a fixed clamp, a torque wrench, etc. can also be used to apply a clamping force to the connecting device, and a corresponding clamping force sensor is used to measure the clamping force.

[0056] Specifically, the support arm 2 is fixed on the connecting plate 31 by welding. The connecting plate 31 is circular. The main support 1 is between the two circular connecting plates. The bolt 32 passes through the two connecting plates 31. The clamping force sensor 7 is located between the circular connecting plate and the nut 33. The bolt 32 is connected to the nut 33 and applies a pre-tightening force. The slip load of the support arm is mainly ensured by the pre-tightening force bolt providing a clamping force for the surface of the circular connecting plate and the main support 1. The pulling arm 5 has a through hole, and the support arm 2 passes through the through hole. In addition, the surfaces of the hollow square steel and the circular connecting plate need to adopt a galvanizing process to ensure the anti-corrosion requirements and thus meet the requirements of the design life.

[0057] According to another aspect of the present invention, a method for determining the slip load of a bracket is provided for the bracket slip load measuring device, including: Step 1, adjusting the clamping member and the applied clamping force; Step 2, starting the external loading device; Step 3, determining the slip load, where the slip load is the force applied by the external loading device when the relative displacement between the connecting device and the main support reaches the displacement threshold; Step 4, selecting the slip load determined in Step 3 to determine the design value of the slip load.

[0058] Specifically, the external loading device is a hydraulic servo.

[0059] Before starting the hydraulic servo, first adjust the main support 1 and the hydraulic servo to a reasonable relative position, install the bolts on the bottom anchor plate of the main support 1, and fix the main support 1 on the foundation; install the bracket, connecting plate and clamping force sensor, and apply torque to the bolt 32 passing through the connecting plate with a torque wrench to meet the installation clamping force requirement. As Figure 3 and Figure 4 shown, the loading methods of the slip load measuring device include single-sided loading and double-sided loading. Therefore, the slip load can be considered in two cases: single-sided slip load and double-sided slip load. The single-sided slip load means that the tension arm on one side of the slip load measuring device is stretched, and the double-sided slip load means that the tension arms on both sides of the slip load measuring device are simultaneously stretched by the same force. For the case of double-sided tension, when the relative displacement between the circular connecting plates on both sides and the main support 1 is 1 mm, the structure shows a slip phenomenon, and the 1 mm is the displacement threshold. As Figure 2 shown, because the slip on the surface of the galvanized layer is different from that on the surface of other metals, the relative displacement of 1 mm can be restored during the vibration test, and the relative displacement exceeding 1 mm cannot be restored. Therefore, the relative displacement of 1 mm is calibrated here as the starting point of the slip load F. For single-sided tension, 1 mm is also used as the starting point for calibrating the slip. As Figure 9 shown, the slip of single-sided tension is divided into two steps. First, the circular connecting plate on the tension side slides to obtain a load F1, and then the circular connecting plate on the other side slides to obtain another load F2, and F2 is twice that of F1.

[0060] In other embodiments, the displacement threshold can be other values such as 0.5 mm, 0.8 mm, 1.2 mm, 1.5 mm, etc.; in other embodiments, the displacement threshold is a value within the range of 0.5 - 1.5 mm.

[0061] Applying the above technical solutions of the present invention, at least the following technical effects are achieved:

[0062] 1. The present invention can determine the surface slip coefficients of different galvanizing processes, as well as the slip load magnitudes under different installation forms and clamping force loads. Real-time monitoring of the bolt pre-tightening force load. A clamping force sensor is installed at the end of the installed bolt to monitor the magnitude of the bolt pre-tightening force and the change in the bolt clamping force during the slip process in real time.

[0063] 2. The present invention can achieve the time synchronization of data. In order to accurately analyze the slip load, the calibration points of the slip load are determined through vibration and seismic experiments; it can analyze the magnitudes of the primary side slip and secondary side slip loads of unilateral tensile slip; and synchronously analyze the change trend of the bolt pre-tightening force magnitude during the slip process.

[0064] 3. The present invention can quickly measure the loads and material surface characteristics under different structural forms and, according to one aspect of the present invention, as Figure 3-8 shown, a slip load measuring device is proposed, which includes a main support 1, a support arm 2, a connecting device 3, a pulling arm 5, and a clamping force sensor 7. The connecting device 3 includes two opposite connecting surfaces and a clamping component. The two opposite connecting surfaces are in contact with the main support 1, and the clamping component applies a clamping force between the two connecting surfaces and the main support. The connection of the connecting device 3 to the support arm 2; the pulling arm 5 is connected to the support arm 2, and the pulling arm is configured to be directly or indirectly connected to an external loading device; the clamping force sensor 7 is located inside or around the connecting device 3 to measure the clamping force.

[0065] Under the stress state, it provides a reference for design, is simple to operate, and realizes rapid and accurate measurement.

[0066] Embodiment 2

[0067] According to one aspect of the present invention, as Figure 3-8 shown, a slip load measuring device is proposed, which includes a main support 1, a support arm 2, a connecting device 3, a pulling arm 5, and a clamping force sensor 7. The connecting device 3 includes two opposite connecting surfaces and a clamping component. The two opposite connecting surfaces are in contact with the main support 1, and the clamping component applies a clamping force between the two connecting surfaces and the main support. The connection of the connecting device 3 to the support arm 2; the pulling arm 5 is connected to the support arm 2, and the pulling arm is configured to be directly or indirectly connected to an external loading device; the clamping force sensor 7 is located inside or around the connecting device 3 to measure the clamping force.

[0068] The main support 1 has two bearing surfaces, and the two bearing surfaces are respectively in contact with the two connecting surfaces of the connecting device 3. The loading direction of the bracket slip load measuring device is parallel to the bearing surface and the connecting surface. Specifically, a single hollow square steel is used as the main support. The bottom of the main support 1 is an anchor plate and bolts, and the slip load measuring device is fixed on the foundation through the anchor plate and bolts at the bottom of the main support 1. The foundation can be a wall, a roof or the ground, etc.

[0069] More specifically, the main support 1 is a hollow square steel with a specification of 100×100×8 and a height of 1200, and the anchor plate is a steel plate with a specification of 300×300×10.

[0070] The bracket arm 2 is perpendicular to the main support 1. The connecting device 3 includes two connecting plates 31. Both of the two connecting plates 31 are perpendicular to the bracket arm 2. Both of the two connecting plates 31 are parallel to the bearing surface of the main support 1. The two connecting plates 31 are parallel to each other. The two opposite connecting surfaces are the surfaces of the two connecting plates 31 that are in contact with the main support 1. The clamping member includes a bolt 32 and a nut 33. The bolt 32 passes through the two connecting plates 31, and the bolt 32 is connected to the nut 33 to apply a clamping force to the two connecting plates 31. The clamping force sensor is located between the nut 33 and the connecting plate 31. The tension arm 5 is perpendicular to the bracket arm 2, and the tension arm 5 is parallel to the main support 1. Specifically, the bracket arm 2 is placed horizontally, the main support 1 is placed vertically, the tension direction of the tension arm 5 is perpendicular to the horizontal direction, and the tension direction of the tension arm 5 is parallel to the vertical direction. The bracket arm 2 is fixed to the connecting plate 31 by welding. The connecting plate 31 is circular. The main support 1 is between two circular connecting plates. The bolt 32 penetrates through the two connecting plates 31. The clamping force sensor 7 is located between the circular connecting plate and the nut 33. The bolt 32 is connected to the nut 33 and applies a pre-tightening force. The slip load of the bracket arm is mainly ensured by the pre-tightening force bolt providing a clamping force to the surface of the circular connecting plate and the main support 1. The tension arm 5 has a through hole, and the bracket arm 2 passes through the through hole. In addition, the surfaces of the hollow square steel and the circular connecting plate need to adopt a galvanizing process to meet the anti-corrosion requirements so as to achieve the design life requirements.

[0071] More specifically, the bracket arm 2 is a C-channel steel with a specification of 42×42×2.8 and a length of 250; the specification of the nut 33 is M20; the specification of the bolt 32 is M20×200; there are a washer and a spring washer between the nut 33 and the circular connecting plate. The specification of the washer is L20, and the specification of the spring washer is W20.

[0072] As Figure 6As shown, the slip load measuring device further includes a displacement sensor 9. The fixed point and the measuring point of the displacement sensor 9 are respectively located on the main support 1 and the connecting device 3, or the fixed point and the measuring point of the displacement sensor 9 are respectively located on the connecting device 3 and the main support 1. Specifically, the fixed point of the displacement sensor 9 is located on the main support 1, and the measuring point is located on the circular connecting plate, excluding the influence of the elastic deformation of other structural members and accurately reflecting the relative slip between the connecting device 3 and the main support 1.

[0073] In other embodiments, the positions of the fixed point and the measuring point may also be respectively located on the structure fixedly connected to the connecting device 3 and the structure fixedly connected to the main support 1, or the positions of the fixed point and the measuring point are respectively located on the structure fixedly connected to the main support 1 and the structure fixedly connected to the connecting device 3.

[0074] As Figure 8 shown, the slip load measuring device further includes a loading force sensor 8. The loading force sensor 8 is located between the bracket slip load measuring device and the external loading device. Specifically, the loading force sensor 8 is located at the position where the external loading device stretches.

[0075] As Figure 1 shown, the slip load measuring device further includes a time synchronization collector. The clamping force sensor 7, the displacement sensor 9 and the loading force sensor 8 are connected to the same time synchronization collector. The slip load measuring device further includes a data processing system. The data processing system processes the information collected by the clamping force sensor 7, the displacement sensor 9 and the loading force sensor 8. Specifically, the time synchronization collector collects the data of the clamping force sensor 7, the displacement sensor 9 and the loading force sensor 8 at the same sampling frequency, and the data processing system processes the data collected by the time synchronization sampler to analyze the slip load trend and measure the magnitude of the slip load.

[0076] As Figure 3 and Figure 5As shown, the pull arms 5 are installed on both sides to simulate the bilateral installation of the cable. The slip load measuring device includes two support arms 2, and the two support arms 2 are respectively on both sides of the main support 1. One ends of the two support arms 2 are respectively connected to two connecting plates 31 of the connecting device 3. The slip load measuring device includes two pull arms 5, and one ends of the two pull arms 5 are respectively connected to the two support arms 2. The slip load measuring device further includes a cross beam 4, and both ends of the cross beam 4 are respectively connected to the other ends of the two pull arms 5. Specifically, the two pull arms 5 are respectively located on the left and right sides of the main support 1 and are parallel to the main support 1. The two pull arms 5, the support arms 2 and the cross beam are basically in the same plane. Both ends of the pull arms 5 respectively have through holes. The cross beam 4 passes through the through holes at the upper ends of the pull arms and is connected to the pull arms. The support arms 2 pass through the through holes at the lower ends of the pull arms 5 and are connected to the pull arms 5.

[0077] In other embodiments, such as Figure 4 As shown, the pull arm 5 is installed on one side to simulate the unilateral installation of the cable.

[0078] Such as Figure 5 As shown, there are multiple pairs of connection points 41 on the support arm 2 and the cross beam 4. The pull arm 5 can be positioned at any pair of the multiple connection points 41. The pair of connection points 41 are respectively located on the support arm 2 and the cross beam 4. The connection line of the two connection points 41 in the pair of connection points 41 is in the vertical direction. Specifically, the connections between the pull arm 5 and the support arm 2 and the cross beam 4 are all loose connections. The pull arm 5 can slide on the support arm 2 and the cross beam 4. More specifically, the through holes at the lower end and the upper end of the pull arm are respectively matched with the support arm 2 and the cross beam 4. There are multiple adjustable positions on the cross beam 4, so as to simulate different installation positions of the cable tray load.

[0079] The slip load measuring device further includes a connector 6, and the connector 6 is connected to the other end of the pull arm 5. The connector is located on the action line of the loading force.

[0080] Specifically, the connector 6 is used as an auxiliary fixture for the test. When the slip load measuring device has a cross beam 4, the connector 6 is connected to the upper loading force sensor 8 through bolts, and the lower part is connected to the cross beam through a pin shaft; when the slip load measuring device does not have a cross beam 4, the connector 6 is connected to the upper loading force sensor 8 through bolts, and the lower part is directly connected to the pull arm 5 through a pin shaft, thus ensuring the convenience and quickness of installation and adjustment and being easy to operate.

[0081] In other embodiments, the slip load measuring device does not have a connector 6, and a through hole is provided at the middle position of the cross beam 4 as a test pulling fixture.

[0082] According to another aspect of the present invention, a method for determining the slip load of a bracket is proposed for the bracket slip load measuring device, including: Step 1, adjusting the clamping member and the applied clamping force; Step 2, starting the external loading device; Step 3, determining the slip load, where the slip load is the force applied by the external loading device when the relative displacement between the connecting device and the main support reaches the displacement threshold; Step 4, selecting the slip load determined in Step 3 to determine the design value of the slip load.

[0083] Specifically, the external loading device is a hydraulic servo.

[0084] Before starting the hydraulic servo, first adjust the main support 1 and the hydraulic servo to a reasonable relative position, install the bolts on the bottom anchor plate of the main support 1, and fix the main support 1 on the foundation; install the bracket arm, connecting plate and clamping force sensor, and apply torque to the bolts 32 passing through the connecting plate 31 with a torque wrench to meet the requirement of the installation clamping force.

[0085] The bracket slip load measuring device further includes a displacement sensor 9 and a loading force sensor 8, and Step 1 further includes installing the displacement sensor 9 and the loading force sensor 8.

[0086] As Figure 3 and Figure 4 shown, the loading methods of the slip load measuring device include single-sided loading and double-sided loading. Therefore, the slip load is considered in two cases: single-sided slip load and double-sided slip load. The single-sided slip load means that the tension arm on one side of the slip load measuring device is subjected to tension, and the double-sided slip load means that the tension arms on both sides of the slip load measuring device are simultaneously subjected to the same force for tension. For the case of double-sided tension, when the relative displacement between the circular connecting plates on both sides and the main support 1 is 1 mm, the structure shows a slip phenomenon, and the 1 mm is the displacement threshold. As Figure 2 shown, because the slip on the surface of the galvanized layer is different from that on the surface of other metals, the relative displacement of 1 mm can be restored during the vibration test, and the relative displacement exceeding 1 mm cannot be restored. Therefore, the relative displacement of 1 mm is calibrated here as the starting point of the slip load F. For single-sided tension, 1 mm is also used as the starting point for calibrating the slip. As Figure 10 shown in the experimental results, the slip of single-sided tension is divided into two steps. First, the circular connecting plate on the tension side slides to obtain a load F1, and then the circular connecting plate on the other side slides to obtain another load F2, and F2 is twice that of F1.

[0087] Apply a pre-tension force to the bracket slip load measuring device before performing Step 2. Specifically, as Figure SevenAs shown, after debugging, through analysis and calculation, it is obtained that a pre-tension of 5 KN is applied first, which will make the subsequently measured data more linear and also eliminate some installation differences. When simulating the slip load under seismic loads, the tension can be applied at a relatively high speed. At this time, the faster the load application speed, the closer it is to the actual situation.

[0088] In other embodiments, the bracket slip load measuring device is made of other metal materials, such as copper or aluminum. At this time, the pre-tension value applied to the bracket slip load measuring device is about 5%-10% of the material strength of the device.

[0089] The bracket slip load measuring device further includes a time synchronization collector. Step one further includes connecting the clamping force sensor 7, the displacement sensor 9, and the loading force sensor 8 to the same time synchronization collector to synchronize the data signals of the clamping force sensor 7, the loading force sensor 8, and the displacement sensor 9.

[0090] The bracket slip load measuring device has only one support arm 2. The connecting device 3 includes two connecting plates 31. The two displacement sensors 9 respectively measure the sliding displacements of the two connecting plates 31. The force applied by the external loading device when the connecting plate 31 on the side close to the external loading device reaches the displacement threshold is the designed value of the slip load. Specifically, in this embodiment, the signals of two displacement sensors, 2 clamping force sensors, and 1 force sensor are connected to the same signal processor, and the same sampling frequency is used to ensure data synchronization.

[0091] For the single-sided slip load, F1 is directly used as the designed value of the slip load. For the double-sided slip load, F is directly used as the designed value of the slip load. From Figure 9 and Figure 10 It can be analyzed that even if the connecting device 3 slips, the slip load always increases. From the data, it can be seen that the safety margins for double-sided and single-sided installations are more than 2 times respectively. This solution can accurately measure the magnitude of the slip load on the special coating surface, and the designed slip load and safety margin can be obtained through the measured data.

[0092] Applying the above technical solutions of the present invention, at least the following technical effects are achieved:

[0093] 1. The present invention can determine the slip coefficients on the surfaces of different galvanizing processes, as well as the magnitudes of slip loads under different installation forms and clamping force loads. The types of the present invention can be divided into double-sided, single-sided, and adjustable-spacing slip load measuring devices. Moreover, the present invention has a simple structure, is easy to process and manufacture, and is relatively convenient and fast to install and use.

[0094] 2. The measuring point and the fixed point of the displacement sensor of the present invention are respectively on the connecting device and the main support, excluding the influence of the elastic deformation of other structural members, and accurately reflecting the relative slip between the circular connecting plate and the main support 1. Two displacement sensors are respectively arranged on both sides of the main support. In particular, the single-sided tensile slip can accurately judge the magnitudes of the primary slip load and the secondary slip load.

[0095] 3. Real-time monitoring of the bolt pre-tightening force load. A clamping force sensor is installed at the end of the bolt to monitor the magnitude of the bolt pre-tightening force and the change of the bolt clamping force during the slip process in real time. A force sensor is added at the tensile position, and then all sensors are connected to a time synchronization collector for data time synchronization acquisition and analysis work, analyzing the slip load trend and being able to accurately measure the magnitude of the slip load.

[0096] 4. The present invention can achieve the time synchronization of data. In order to accurately analyze the slip load, the calibration point of the slip load is determined through vibration and anti-seismic experiments; the magnitudes of the primary side slip and the secondary side slip loads of the single-sided tensile slip can be analyzed; and the change trend of the bolt pre-tightening force magnitude during the slip process is synchronously analyzed.

[0097] 5. The present invention can quickly measure the loads and material surface characteristics under different structural forms and stress states, provide a reference for design, is simple to operate, and realizes rapid and accurate measurement.

[0098] The above are only multiple specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

[0099] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0100] It should be noted that in the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A support slip load measuring device, characterized in that Comprising a main support (1), a bracket arm (2), a connecting device (3), a pulling arm (5) and a clamping force sensor (7), The connecting device (3) includes two opposite connecting surfaces and a clamping member. The two opposite connecting surfaces contact the main support (1), and the clamping member applies a clamping force between the two connecting surfaces and the main support. The connecting device (3) is connected to the bracket arm (2); the pulling arm (5) is connected to the bracket arm (2), and the pulling arm is configured to be directly or indirectly connected to an external loading device; The clamping force sensor (7) is located inside or around the connecting device (3) to measure the clamping force.

2. The bracket slip load measuring device according to claim 1, wherein The main support (1) has two bearing surfaces, and the two bearing surfaces respectively contact the two connecting surfaces of the connecting device (3).

3. The bracket slip load measuring device according to claim 2, characterized in that, The loading direction of the bracket slip load measuring device is parallel to the bearing surface and the connecting surface.

4. The bracket slip load measuring device according to claim 1, characterized in that The bracket arm (2) is perpendicular to the main support (1).

5. The bracket slip load measuring device according to claim 3, characterized in that The connecting device (3) includes two connecting plates (31). Both of the two connecting plates (31) are perpendicular to the bracket arm (2), both of the two connecting plates (31) are parallel to the bearing surface of the main support (1), the two connecting plates (31) are parallel to each other, and the two opposite connecting surfaces are the surfaces of the two connecting plates (31) that contact the main support (1).

6. The bracket slip load measuring device according to claim 5, characterized in that, The clamping member includes a bolt (32) and a nut (33). The bolt (32) passes through the two connecting plates (31), and the bolt (32) is connected to the nut (33) to apply a clamping force to the two connecting plates (31). The clamping force sensor is located between the nut (33) and the connecting plate (31).

7. The support slip load measuring device according to claim 1, wherein The pulling arm (5) is perpendicular to the bracket arm (2), and the pulling arm (5) is parallel to the main support (1).

8. The bracket slip load measuring device according to claim 1, characterized in that, Further comprising a displacement sensor (9), the fixed point and the measuring point of the displacement sensor (9) are respectively located on the main support (1) and the connecting device (3), or the fixed point and the measuring point of the displacement sensor (9) are respectively located on the connecting device (3) and the main support (1).

9. The bracket slip load measuring device according to claim 8, characterized in that, Further comprising a loading force sensor (8), the loading force sensor (8) is located between the bracket slip load measuring device and the external loading device.

10. The bracket slip load measuring device according to claim 9, characterized in that, Further comprising a time synchronization collector, the clamping force sensor (7), the displacement sensor (9) and the loading force sensor (8) are connected to the same time synchronization collector.

11. The support slip load measuring device according to claim 10, characterized in that, Further comprising a data processing system, the data processing system processes the information collected by the clamping force sensor (7), the displacement sensor (9) and the loading force sensor (8).

12. The bracket slip load measuring device according to claim 5, wherein, Comprising two of the bracket arms (2), the two bracket arms (2) are respectively on both sides of the main support (1), and one ends of the two bracket arms (2) are respectively connected to the two connecting plates (31) of the connecting device (3).

13. The bracket slip load measuring device according to claim 12, wherein Comprising two of the pulling arms (5), one ends of the two pulling arms (5) are respectively connected to the two bracket arms (2).

14. The bracket slip load measuring device according to claim 13, wherein It further includes a cross beam (4), and two ends of the cross beam (4) are respectively connected to the other ends of the two pull arms (5).

15. The bracket slip load measuring device according to claim 14, characterized in that, There are multiple pairs of connection points (41) on the support arm (2) and the cross beam (4). The pull arm (5) can be positioned at any pair of the multiple connection points (41). The pair of connection points (41) are respectively located on the support arm (2) and the cross beam (4). The connection line of the two connection points (41) in the pair of connection points (41) is in the vertical direction.

16. The support slip load measuring device according to claim 1, wherein It further includes a connector (6). The connector (6) is connected to the other end of the pull arm (5), and the connector is located on the action line of the loading force.

17. The bracket slip load measuring device according to claim 15, wherein It further includes a connector (6). The connector (6) is connected to the cross beam, and the connector is located on the action line of the loading force.

18. A method for determining the sliding load of a bracket, which is used for the bracket sliding load measuring device according to claim 1, comprising: Step 1: Adjust the clamping component and the applied clamping force; Step 2: Start the external loading device; Step 3: Determine the slip load, where the slip load is the force applied by the external loading device when the relative displacement between the connecting device (3) and the main support (1) reaches the displacement threshold; Step 4: Select the slip load determined in Step 3 to determine the design value of the slip load.

19. The method for determining the sliding load of the bracket according to claim 18, wherein Apply a pre-tension force to the support slip load measuring device before performing Step 2.

20. The method for determining the sliding load of the bracket according to claim 18, wherein The support slip load measuring device further includes a displacement sensor (9), and Step 1 further includes installing the displacement sensor (9).

21. The method for determining the sliding load of the bracket according to claim 20, characterized in that, The support slip load measuring device further includes a loading force sensor (8), and Step 1 further includes installing the loading force sensor (8).

22. The method for determining the slip load of the bracket according to claim 21, wherein The support slip load measuring device further includes a time synchronization collector, and Step 1 further includes connecting the clamping force sensor (7), the displacement sensor (9) and the loading force sensor (8) to the same time synchronization collector to synchronize the data signals of the clamping force sensor (7), the loading force sensor (8) and the displacement sensor (9).

23. The method for determining the sliding load of the bracket according to claim 20, wherein, The support slip load measuring device only has one support arm (2). The connecting device (3) includes two connecting plates (31). The two displacement sensors (9) respectively measure the sliding displacements of the two connecting plates (31), and the force applied by the external loading device when the connecting plate (31) on the side close to the external loading device reaches the displacement threshold is the design value of the slip load.

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