Attached tension measuring device and method of use thereof

Abstract

The present invention discloses an attached tension measuring device and a method for using the same. The attached tension measuring device comprises a cable fixing component, a connecting block, a power component and a force measuring component; the cable fixing component comprises a fixing rod and a fixing block which are perpendicular to each other; a first fixing hole for passing the fixing rod is provided on the fixing block; the connecting block is arranged parallel and spaced apart from the fixing block, and a guide hole is provided vertically on the connecting block; the fixing block is used to connect the ends of the cable; one end of the force measuring component is connected to the fixing rod, and the other end is connected to the connecting block; one end of the power component is connected to the fixing block, and the other end of the power component is connected to the connecting block, so that the fixed block is driven to slide along the fixing rod by the power component. In the technical solution of the present invention, the fixing block is connected by the power component, the connecting block, the force measuring component and the fixing rod which are connected in sequence, and the tension of the cable rope received by the fixing block is directly and accurately measured without changing the force direction of the cable rope, so as to obtain an accurate measurement result.

Description

Technical Field

[0001] The invention relates to the technical field of tension testing equipment, and in particular to an attached tension measuring device and a method for using the attached tension measuring device. Background Art

[0002] Cables are widely used in tall cable-stayed tower structures, cable-stayed bridges, suspension bridges, tied arches, and places where cables are used for construction. The cable tension of the cables in tall cable-stayed tower structures, the cable stays in cable-stayed bridges, the main cables and slings in suspension bridges, the slings in tied arches, and the cables in construction is an extremely important design parameter. Accurately estimating the cable tension of cables has important practical significance. At present, the vibration method is widely used at home and abroad to estimate the cable tension of cables, that is, the cable tension of cables is estimated by the measured natural frequency of cable vibration. Because the natural frequency of cables is not only affected by the cable tension, but also by the bending stiffness, vertical span ratio, and the support conditions and inclination angle of the cables. Therefore, the cable tension value of the cable obtained by the vibration method is only an approximate value obtained indirectly after assumptions and conversions, and it is not easy to obtain the accurate cable tension value of the cable. Summary of the invention

[0003] The main purpose of the present invention is to provide an attached tension measuring device, aiming to solve the problem that it is difficult to obtain an accurate tension value of a cable steel cable with the existing measuring device.

[0004] To achieve the above-mentioned purpose, the attached tension measuring device proposed in the present invention includes a cable fixing component, a connecting block, a power component and a force measuring component; the cable fixing component includes a fixing rod and a fixing block which are perpendicular to each other; a first fixing hole for passing the fixing rod is provided on the fixing block; the connecting block is arranged parallel to and spaced apart from the fixing block, and a guide hole is vertically provided on the connecting block; the fixing block is used to connect the end of the cable so that the cable passes through the guide hole in a direction parallel to the fixing rod; one end of the force measuring component is connected to the fixing rod, and the other end is connected to the connecting block; one end of the power component is connected to the fixing block, and the other end of the power component is connected to the connecting block, so that the fixing block can be driven to slide along the fixing rod by the power component.

[0005] Preferably, the force measuring component comprises a sensor and a connecting rod, one end of the sensor is connected to the fixing rod, and the other end of the sensor is connected to the connecting block through the connecting rod.

[0006] Preferably, the power component includes a first support rod, a second support rod, a hydraulic cylinder and a hydraulic pump, the fixed end of the hydraulic cylinder is connected to the first support rod, the movable end of the hydraulic cylinder is connected to the second support rod, the first support rod is connected to the connecting block, the second support rod is connected to the fixed block, and the hydraulic pump is used to drive the hydraulic cylinder to reciprocate.

[0007] Preferably, the power component further includes a controller and an electromagnetic reversing valve, the hydraulic pump and the electromagnetic reversing valve are both connected to the controller, and the hydraulic pump is connected to the controller via the electromagnetic reversing valve.

[0008] Preferably, the fixing rod comprises two rod segments arranged in parallel and at intervals, the fixing block is arranged perpendicular to the rod segments, and the fixing block is provided with two first fixing holes for respectively passing the two rod segments, and the power component and the force measuring component are both provided with two groups symmetrically arranged about the axis of the rope; the same ends of the two rod segments are respectively connected by connecting sections, and the other ends of the two rod segments are respectively connected to the two force measuring components one by one.

[0009] Preferably, the rod segment is provided with an external thread, and the two sides of the rod segment passing through the first fixing hole are threadedly connected to the external thread of the rod segment through a first fixing nut respectively; the part of the fixing block located between the two rod segments is connected with a rope parallel to the rod segment.

[0010] Preferably, the force measuring component further comprises a display device, and the display device is used to display the magnitude of the force borne by the sensor and the calculation result of the calculation unit.

[0011] Preferably, it also includes a control component, which includes a calculation module and a control panel, a display module and a storage module connected to the calculation module, the control panel is connected to and controls the power component, the force measuring component is connected to the storage module, and the data obtained by the force measuring component is recorded in the storage module; the calculation module is used to obtain the control record of the control panel and the data record of the force measuring component of the storage module, and calculate the tension of the rope.

[0012] Preferably, the power component includes a feedback unit, and the feedback unit is used to feed back power data of the power component. The method for using the attached tension measurement device includes the following steps:

[0013] After the attached tension measuring device is assembled, the power component is controlled to move the fixed block so that the tension of the rope acts on the force measuring component;

[0014] Acquire the power data of the power component and the data of the force measuring component, and determine whether the difference between the power data of the power component and the data of the force measuring component is less than a preset value;

[0015] If yes, the fixed block is controlled to move by the power component, so that the force measuring component obtains a plurality of groups of measurement data of the rope tension of the fixed block at different rope positions;

[0016] A plurality of groups of measurement data of the rope tension are obtained according to the force measuring component, and the rope tension is obtained by calculation.

[0017] In the technical solution of the present invention, the fixed block is not directly connected to the fixed rod, but is connected through a power component, a connecting block, a force measuring component and a fixed rod which are connected in sequence, so that the tension of the steel cable received by the fixed block can be directly measured without changing the force direction of the cable and causing damage to the cable. The power component controls the distance between the connecting block and the fixed block, which is more convenient during testing and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a schematic structural diagram of the attached tension measuring device of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the attached tension measuring device of the present invention when measuring force.

[0021] Figure 3 The figure is a schematic diagram of the structure of an existing rope fixing device.

[0022] Description of Figure Numbers:

[0023] Label name Label name Label name 1 Fixed rod 2 First fixing nut 3 Fixed block 4 Fixing holes 5 Connection Block 6 Power components 7 Force measuring components 8 First support rod 9 Second support rod 10 Hydraulic Cylinders 11 Rope 12 First connecting hole 13 Second fixing nut 14 sensor 15 Connecting rod 16 Second connection hole 17 Connecting nut

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Please refer to Figure 1 and Figure 2The present invention proposes an attached tension measuring device, comprising a connecting block 5, a power component 6 and a force measuring component 7; the connecting block 5 is arranged in parallel with the fixed block 3, a guide hole is vertically opened in the middle of the connecting block 5, the cable passes through the guide hole, one end of the force measuring component 7 is connected to the connecting block 5, and the other end of the force measuring component 7 is connected to the fixed rod 1, one end of the power component 6 is connected to the fixed block 3, and the other end of the power component 6 is connected to the connecting block 5, and the power component 6 and the force measuring component 7 are both provided with two groups symmetrically arranged about the axis of the cable.

[0031] In the technical solution of the present invention, the fixed block 3 is slidably connected to the fixed rod 1. The fixed block 3 is connected through the power component 6, the connecting block 5, the force measuring component 7 and the fixed rod 1 which are connected in sequence. Without changing the force direction of the rope 11, the tension of the rope 11 received by the fixed block 3 is directly and accurately measured. Since the force direction of the rope 11 is not changed, accurate measurement results can be obtained without causing damage to the rope 11. The power component 6 controls the distance between the connecting block 5 and the fixed block 3, which is more convenient during testing and installation. Specifically, a protective shell is provided on the outside of the force measuring component 7 to prevent the force measuring component 7 from being damaged and affecting the measurement accuracy.

[0032] Please refer to Figure 1 and Figure 2 In another embodiment of the present invention, the force measuring component 7 includes a sensor 14 and a connecting rod 15, one end of the sensor 14 is connected to the fixing rod 1, and the other end of the sensor 14 is connected to the connecting block 5 through the connecting rod 15.

[0033] Specifically, the connecting rod 15 and the connecting block 5 are movably connected by providing a thread on the connecting rod 15 and providing a second fixing nut 13 on both sides of the second connecting hole 16. Control the distance between the connecting block 5 and the fixing block 3. The connecting block 5 is provided with a second connecting hole 16 at both ends, and the axes of the two second connecting holes 16 are symmetrically arranged about the axis of the guide hole. The connecting rod 15 is provided with a thread, and the two connecting rods 15 pass through the second connecting holes 16 at both ends of the connecting block 5 respectively. The connecting block 5 is provided with a second fixing nut 13 on both sides of the second connecting hole 16, and the second fixing nut 13 is threadedly connected to the connecting rod 15. More specifically, first connecting holes 12 are provided at both ends of the connecting block 5, and the axes of the two first connecting holes 12 are symmetrically arranged about the axis of the guide hole. The first support rod 8 is provided with threads, and the two first support rods 8 pass through the first connecting holes 12 at both ends of the connecting block 5 respectively. Second fixing nuts 13 are provided on both sides of the connecting block 5 where the first connecting holes 12 are provided, and the second fixing nuts 13 are threadedly connected with the first support rod 8. The movable connection between the first support rod 8 and the connecting block 5 is achieved through the threads on the first support rod 8 and the second fixing nuts 13. The distance between the connecting block 5 and the fixed block 3 is controlled. The sensor 14 is a pressure sensor, and the sensor 14 is connected to the fixed rod through the provided connecting nut 17.

[0034] Please refer to Figure 1 and 2 In another embodiment of the present invention, the power component 6 includes a first support rod 8, a second support rod 9, a hydraulic cylinder 10 and a hydraulic pump, the fixed end of the hydraulic cylinder 10 is connected to the first support rod 8, the movable end of the hydraulic cylinder 10 is connected to the second support rod 9, the first support rod 8 is connected to the connecting block 5, the second support rod 9 is connected to the fixed block 3, and the hydraulic pump is used to drive the hydraulic cylinder 10 to reciprocate.

[0035] Specifically, the hydraulic pump is used to drive the hydraulic cylinder 10 to reciprocate to control the distance between the connecting block 5 and the fixed block 3. More specifically, the first support rod 8 is movably connected to the fixed block 3, and the second support rod 9 is movably connected to the connecting block 5. Therefore, when assembling the attached tension measuring device, the distance between the connecting block 5 and the fixed block 3 is estimated and controlled in advance to avoid the failure to reach the specified distance due to the travel distance of the hydraulic cylinder 10.

[0036] Please refer to Figure 1 and Figure 2In another embodiment of the present invention, the power component 6 further includes a controller and an electromagnetic reversing valve, the hydraulic pump and the electromagnetic reversing valve are both connected to the controller, and the hydraulic pump is connected to the controller through the electromagnetic reversing valve.

[0037] Specifically, the controller controls the hydraulic system by controlling the hydraulic pump and the electromagnetic reversing valve, thereby enhancing the control over the hydraulic system. The control over the hydraulic system is integrated into the controller, which is more convenient and quick during testing and avoids the need to move around to control the hydraulic system.

[0038] Please refer to Figure 1 and Figure 2 In another embodiment of the present invention, the fixing rod 1 includes two rod segments arranged in parallel and at intervals, the fixing block 3 is arranged perpendicular to the rod segments, and the fixing block 3 is provided with two first fixing holes 4 for respectively passing the two rod segments, and the power component 6 and the force measuring component 7 are both provided with two groups symmetrically arranged about the axis of the rope 11; the same ends of the two rod segments are respectively connected by connecting segments, and the other ends of the two rod segments are respectively connected to the two force measuring components 7 one by one.

[0039] Specifically, the fixing block includes two parallel and spaced-apart rod segments, and the power component 6 and the force measuring component 7 are both provided with two groups symmetrically arranged about the axis of the rope 11. Testing is performed from both sides of the rope and pressure is applied by the power component, so that the force is more balanced.

[0040] Please refer to Figure 1 and Figure 2 In another embodiment of the present invention, the rod segment is provided with an external thread, and the two sides of the rod segment passing through the first fixing hole 4 are threadedly connected to the external thread of the rod segment through a first fixing nut 2; the part of the fixing block 3 located between the two rod segments is connected with a rope 11 parallel to the rod segment.

[0041] Specifically, the rod segment is provided with an external thread, which is connected to the first fixing nut 2 to adjust the relative position of the rod segment and the fixing block 3, and also fix the rod segment and the fixing block 3 at normal times.

[0042] Please refer to Figure 1 and Figure 2 In another embodiment of the present invention, the force measuring component 7 further includes a display device, and the display device is used to display the magnitude of the force borne by the sensor 14.

[0043] Specifically, the real-time detection data of the sensor 14 is displayed through the display unit.

[0044] Please refer to Figure 1 and Figure 2 In another embodiment of the present invention, the power component 6 further includes a pressure gauge, and the two pressure gauges are connected to the two hydraulic cylinders 10 respectively.

[0045] Specifically, by detecting the pressure of the hydraulic cylinder 10 through a pressure gauge, the approximate tension range of the cable can be obtained during the movement of the hydraulic cylinder 10. During the process of the hydraulic pump pressurizing the hydraulic cylinder 10, when the tension is equal to or slightly greater than the pressure in the hydraulic cylinder 10, the pressure change of the pressure gauge will stop or reverse and then continue to rise. More specifically, the pressure gauge is an electromagnetic pressure gauge.

[0046] Please refer to Figure 1 and Figure 2 The attached tension measuring device also includes a control component, which includes a calculation module and a control panel, a display module and a storage module connected to the calculation module. The control panel is connected to and controls the power component 6, the force measuring component 7 is connected to the storage module, and the data obtained by the force measuring component 7 is recorded in the storage module; the calculation module is used to obtain the control record of the control panel and the data record of the force measuring component 7 in the storage module, and calculate the tension of the rope.

[0047] Specifically, the calculation module obtains the control record of the control panel and the data record of the force measuring component 7 of the storage module to obtain the tension of the rope by weighted average, so that the rope tension can be obtained faster and more accurately. The fixed block 3 can move on the fixed rod 1. At each sliding position of the fixed block 3 on the fixed rod 1, the power component 6 and the force measuring component 7 measure and record the tension of the rope 11; the calculation module is used to form the tension curve of the rope 11 at different positions of the fixed block 3 on the fixed rod 1 according to the tension values ​​of different sections of the rope 11 under the same stretching length, and the tension curve of the rope 11 is displayed on the display interface of the measuring device. According to the designed tension and error range of the rope 11, the calculation module forms the analysis results and adjustment suggestions of the rope 11.

[0048] Please refer to Figure 1 and Figure 2 The present invention also provides a method for using an attached tension measuring device, which is applied to any of the above-mentioned attached tension measuring devices, wherein the power component 6 includes a feedback unit, and the feedback unit is used to feed back the power data of the power component 6. The method for using the attached tension measuring device includes the following steps:

[0049] After the attached tension measuring device is assembled, the power component 6 is controlled to move the fixed block 3 so that the tension of the rope 11 acts on the force measuring component 7;

[0050] Acquire the power data of the power component 6 and the data of the force measuring component 7, and determine whether the difference between the power data of the power component 6 and the data of the force measuring component 7 is less than a preset value;

[0051] If yes, the fixed block 3 is controlled to move by the power component 6, so that the force measuring component 7 obtains a plurality of groups of measurement data of the tension of the rope 11 of the fixed block 3 at different positions of the rope 11;

[0052] The force measuring component 7 obtains a plurality of groups of measurement data of the tension of the rope 11 and calculates and obtains the tension of the rope 11 .

[0053] Specifically, it is determined whether the difference between the power data of the power component 6 and the data of the force measuring component 7 is less than a preset value. When the difference between the power data of the power component 6 and the data of the force measuring component 7 is greater than the preset value, the fixed block 3 moves relative to the fixed rod 1, and the actual tension value of the rope 11 cannot be obtained.

[0054] Specifically, during assembly, two groups of force measuring components 7 and two groups of power components 6 need to be parallel, so as to control the force direction of the power components 6 and the force measuring components 7, and prevent the measured tension results from being inconsistent due to the force direction being inconsistent with the tension direction of the rope 11.

[0055] In one embodiment, when the measuring temperature is 30° C., the rope 11 with a designed tension of 364.61 kN is measured.

[0056] The test results are as follows:

[0057] Serial number Number of measurements unit Cable tension data First sensor + second sensor 1 First tensile measurement kN 320.1 157.2+162.9 2 Second tensile force measurement kN 320 157.6+162.4 3 The third tensile measurement kN 319.8 158.3+161.5

[0058] The first sensor is a sensor of one of the force measuring components 7 , and the second sensor is a sensor of another of the force measuring components 7 .

[0059] Conclusion: The actual tension of rope 11 does not reach the design tension, and the tension of rope 11 needs to be increased to the design tension. The adjustment range is 26.6kN-63kN, and the qualified range is 346.4kN-382.8kN.

[0060] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An attached tension measuring device, characterized in that: It comprises a cable fixing component, a connecting block, a power component and a force measuring component; the cable fixing component comprises a fixing rod and a fixing block which are perpendicular to each other; a first fixing hole for passing the fixing rod is provided on the fixing block; the connecting block is arranged parallel and spaced apart from the fixing block, and a guide hole is vertically provided on the connecting block; the fixing block is used to connect the end of the cable so that the cable passes through the guide hole in a direction parallel to the fixing rod; one end of the force measuring component is connected to the fixing rod, and the other end is connected to the connecting block; one end of the power component is connected to the fixing block, and the other end of the power component is connected to the connecting block, so that the fixing block is driven to slide along the fixing rod by the power component; The power component includes a first support rod, a second support rod, a hydraulic cylinder and a hydraulic pump, the fixed end of the hydraulic cylinder is connected to the first support rod, the movable end of the hydraulic cylinder is connected to the second support rod, the first support rod is connected to the connecting block, the second support rod is connected to the fixed block, and the hydraulic pump is used to drive the hydraulic cylinder to reciprocate; The fixing rod comprises two rod segments arranged in parallel and at intervals, the fixing block is arranged perpendicular to the rod segments, and the fixing block is provided with two first fixing holes for respectively passing the two rod segments, and the power component and the force measuring component are both provided with two groups symmetrically arranged about the axis of the rope; the same ends of the two rod segments are respectively connected by connecting segments, and the other ends of the two rod segments are respectively connected to the two force measuring components one by one.

2. The attachment type tension measuring device according to claim 1, characterized in that: The force measuring component comprises a sensor and a connecting rod, one end of the sensor is connected to the fixing rod, and the other end of the sensor is connected to the connecting block through the connecting rod.

3. The attachment type tension measuring device according to claim 1, characterized in that: The power component further includes a controller and an electromagnetic reversing valve. The hydraulic pump and the electromagnetic reversing valve are both connected to the controller. The hydraulic pump is connected to the controller via the electromagnetic reversing valve.

4. The attachment type tension measuring device according to claim 1, characterized in that: The rod segment is provided with an external thread, and the two sides of the rod segment passing through the first fixing hole are threadedly connected to the external thread of the rod segment through a first fixing nut; the part of the fixing block located between the two rod segments is used to connect a rope parallel to the rod segment.

5. The attachment type tension measuring device according to claim 2, characterized in that: The force measuring component also includes a display device, and the display device is used to display the magnitude of the force borne by the sensor.

6. The attachment type tension measuring device according to claim 1, characterized in that: The power component also includes a pressure gauge, and the two pressure gauges are respectively connected to the two hydraulic cylinders.

7. The attachment type tension measuring device according to claim 1, characterized in that: It also includes a control component, which includes a calculation module and a control panel connected to the calculation module, a display module and a storage module, the control panel is connected to and controls the power component, the force measuring component is connected to the storage module, and the data obtained by the force measuring component is recorded in the storage module; The calculation module is used to obtain the control records of the control panel and the data records of the force measuring component of the storage module, and calculate the tension of the rope.

8. A method for using an attached tension measuring device, characterized in that: Applied to the attachment type tension measurement device as claimed in any one of claims 1 to 7, the power component includes a feedback unit, the feedback unit is used to feed back the power data of the power component, and the method for using the attachment type tension measurement device includes the following steps: After the attached tension measuring device is assembled, the power component is controlled to move the fixed block so that the tension of the rope acts on the force measuring component; Acquire the power data of the power component and the data of the force measuring component, and determine whether the difference between the power data of the power component and the data of the force measuring component is less than a preset value; If yes, the fixed block is controlled to move by the power component, so that the force measuring component obtains a plurality of groups of measurement data of the rope tension of the fixed block at different rope positions; A plurality of groups of measurement data of the rope tension are obtained according to the force measuring component, and the rope tension is obtained by calculation.

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