CN109027622B - Fixing device for testing fundamental frequency at 1/3 position of flexible cable structure and using method - Google Patents
Fixing device for testing fundamental frequency at 1/3 position of flexible cable structure and using method Download PDFInfo
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- CN109027622B CN109027622B CN201810652240.8A CN201810652240A CN109027622B CN 109027622 B CN109027622 B CN 109027622B CN 201810652240 A CN201810652240 A CN 201810652240A CN 109027622 B CN109027622 B CN 109027622B
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- clamping seat
- free end
- movable upper
- open type
- fundamental frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/042—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands by measuring vibrational characteristics of the flexible member
Abstract
The invention discloses a fixing device for testing the fundamental frequency of a flexible cable structure 1/3, which comprises: the movable upper clamping seat comprises a first open type clamping ring, a straight rod clamping pin arranged on the first open type clamping ring and a fixing device for fastening the first open type clamping ring; the fixed lower clamping seat comprises a second open type clamping ring and a straight rod buckle arranged on the second open type clamping ring; one end of the push rod can be arranged in the straight rod clamping pin, and the other end of the push rod can be clamped in the straight rod clamping buckle and used for pushing the movable upper clamping seat to move up and down; the sensor is fixedly arranged on the movable upper clamping seat. Thereby realize fixing the sensor in the preset position of waiting to detect cable or jib through the fixed movable upper clamp seat, fixed lower clamp seat, convenient operation is swift to record the cable fundamental frequency, provide the basis for accurately calculating the cable force of cable.
Description
Technical Field
The invention relates to the technical field of flexible cable structure detection devices, in particular to a fixing device for testing 1/3 fundamental frequency of a flexible cable structure and a using method thereof.
Background
At present, the testing method for flexible cable structures such as guys, suspenders and the like mainly comprises a frequency method, a pressure ring method, an oil pressure meter method, a magnetic flux method and the like, wherein the frequency method is the most widely applied method, and the reason is mainly that the frequency method is simple in testing. The cable force is tested by a frequency method, a sensor is only required to be fixed on a cable to be tested, a vibration signal is picked up by a precision vibration pickup for frequency spectrum analysis, so that the cable vibration frequency is obtained, and the cable force is converted through fundamental frequency. For a good measurement of the fundamental cable frequency, it is necessary to place the sensor at least at the 1/3 level of the cable.
In practical engineering, a precision vibration pickup is mainly bound on a guy cable manually, the binding position of a sensor is limited by the operating height of a person (as shown in fig. 1), so that the testing position is located at one end of the guy cable, the fundamental frequency is generally difficult to analyze, and the fundamental frequency is mostly replaced by frequency difference. If other auxiliary means (such as a climbing robot or a climbing vehicle) are adopted, the consumed time and cost are higher, and the method is less adopted. For a flexible cable with longer length and better integrity, each order frequency is basically in direct proportion to the fundamental frequency, and the fundamental frequency is replaced by the frequency difference with better precision.
In view of the above-mentioned drawbacks of the conventional sensor mounting and fixing, the inventor of the present invention has made extensive practical experience and professional knowledge for many years in the design and manufacture of such products, and has actively studied and innovated in conjunction with the application of theory, so as to create a fixing device and a using method for testing the fundamental frequency at 1/3 of the flexible cable structure, so that the fixing device and the using method are more practical. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The main purpose of the present invention is to overcome the defects of the existing installation and fixation of the sensor, and to provide a fixation device for testing the fundamental frequency of the flexible cable structure 1/3 and a use method thereof, which can conveniently and quickly place the sensor at the position of the cable 1/3 to measure the fundamental frequency of the cable, and provide a basis for accurately calculating the cable force of the cable, so that the present invention is more practical and has industrial utilization value.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
A fixture for testing fundamental frequency at a flexible cable structure 1/3, comprising:
the movable upper clamping seat comprises a first open type clamping ring, a straight rod clamping pin arranged on the first open type clamping ring and a fixing device for fastening the first open type clamping ring;
the fixed lower clamping seat comprises a second open type clamping ring and a straight rod buckle arranged on the second open type clamping ring;
one end of the push rod can be arranged in the straight rod clamping pin, and the other end of the push rod can be clamped in the straight rod clamping buckle and used for pushing the movable upper clamping seat to move up and down;
the sensor is fixedly arranged on the movable upper clamping seat.
As an optimal technical scheme, the straight rod clamping pins are cylindrical clamping seats with grooves formed in the bottoms, and the two straight rod clamping pins are symmetrically arranged on two side faces of the first open type clamping ring respectively.
As a preferred technical scheme, the ejector rod is a telescopic rod.
As a preferred embodiment, the second free end face of the first split snap ring is arranged on the first free end face, wherein:
a gear guide rail is arranged on the second free end surface, and the extending direction of the gear guide rail is along the circumferential direction of the first buckle type clamping ring;
a through hole is formed in the first free end face;
the fixing device comprises a rotary switch which is used for connecting the first free end surface and the second free end surface and fastening the movable upper clamping seat.
As a preferred technical scheme, the rotary switch is a gear with two end faces respectively provided with a fastening clamping seat and a winding shaft, wherein:
the fastening clamping seat is in clearance fit with the through hole and used for fixing the first free end face and the second free end face;
the middle part of the gear is clamped on the gear guide rail and can move back and forth on the gear guide rail;
and a plurality of circles of steel wires are arranged on the winding shaft.
As a preferable technical solution, the first open type snap ring is a steel strip with elasticity, and under the action of canceling the external force, the steel strip is loosened under the action of its own elasticity to return to the original position.
As a preferred technical solution, the first free end surface of the second open type snap ring is disposed on the second free end surface, and a fastening switch is further disposed between the first free end surface and the second free end surface for fastening the fixed lower clamping base.
As a preferable technical scheme, a magic buckle is further arranged between the first free end surface and the second free end surface of the second open type snap ring.
A method of using a fixture for testing fundamental frequency at a flexible cable structure 1/3, comprising the steps of:
and 3, fixing the movable upper clamping seat and the fixed lower clamping seat to finish the fixation of the sensor.
As a preferred technical scheme, the method further comprises a step 4 of loosening the movable upper clamping seat and the fixed lower clamping seat after the test is finished, and detaching the ejector rod to enable the movable upper clamping seat to slide to the lower part, so that the movable upper clamping seat and the fixed lower clamping seat are detached.
By adopting the technical scheme, the following technical effects can be realized:
1) firstly, pushing a movable upper clamping seat movably arranged on a stay cable or a suspension rod to be detected to a preset position through a push rod, namely pushing a sensor fixedly arranged on the movable upper clamping seat to the preset position, and then fixing the sensor at the preset position of the stay cable or the suspension rod to be detected through fixing the movable upper clamping seat and the fixed lower clamping seat, so that the operation is convenient and rapid, the fundamental frequency of the stay cable is measured, and a basis is provided for accurately calculating the cable force of the stay cable;
2) the device is simple in structure and convenient to mount and dismount, and the push rod of the telescopic rod is convenient to store, so that the whole fixing device is convenient to carry;
3) through setting up gear guide and perforating hole and rotary switch's on two free end faces of first open type snap ring cooperation, rotary switch has: the first free end surface and the second free end surface are connected to form a rotating central shaft; the winding shaft realizes the rotation of the rotary switch by pulling the steel wire on the winding shaft and is a power source; and the gear guide rail is connected with the gear guide rail, so that the direction of the movement of the rotary switch is guided, and finally the fastening of the first open type clamping ring at the high position is realized at the low position.
Drawings
FIG. 1 is a schematic view of an installation of a conventional vibration testing apparatus;
FIG. 2 is a schematic structural view of the fixture for testing fundamental frequency at 1/3 of the flexible cable structure of the present invention;
FIG. 3 is a top view of the movable upper clamp base of the present invention;
FIG. 4 is a top view of the fixed lower cartridge of the present invention;
FIG. 5 is a schematic structural view of a movable upper clamping seat in the present invention;
FIG. 6 is a schematic structural diagram of a rotary switch according to the present invention;
wherein, in fig. 1: 1-1, a flexible cable structure; 1-2, staff, 1-3, sensors;
in fig. 2: 1. the sensor comprises a sensor 2, a straight rod clamping pin, 3, a push rod, 4, a first open type clamping ring, 41, a gear guide rail, 42, a through hole, 5-a rotary switch, 51, a fastening clamping seat, 52, a gear, 53, a winding shaft, 6, a steel wire, 7, a second open type clamping ring, 8, a flexible cable structure, 9, a straight rod buckle, 10, a fastening switch, 11 and a magic buckle.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the embodiments, features and effects of the fixing device and the using method for testing the fundamental frequency at the position 1/3 of the flexible cable structure according to the present invention will be described in detail as follows.
As shown in fig. 2-4, the present invention discloses a fixture for testing fundamental frequency at a flexible cable structure 1/3, comprising:
the movable upper clamping seat comprises a first open type clamping ring 4, a straight rod clamping pin 2 arranged on the first open type clamping ring 4 and a fixing device for fastening the first open type clamping ring 4, wherein the straight rod clamping pin 2 is symmetrically arranged on two outer side surfaces of the first open type clamping ring 4, and the fixing device is used for fastening the first open type clamping ring 4 after the first open type clamping ring 4 is arranged to a preset position so as to be fixed on the flexible cable structure 8;
the fixed lower clamping seat comprises a second open type clamping ring 7 and a straight rod buckle 9 arranged on the second open type clamping ring 7, and specifically, the straight rod buckle 9 is symmetrically arranged on two outer side surfaces of the second open type clamping ring 7;
one end of the push rod 3 can be arranged in the straight rod clamping pin 2, and the other end of the push rod 3 can be clamped in the straight rod clamping buckle 9 and used for pushing the movable upper clamping seat to move up and down, namely the fixed lower clamping seat is used as a supporting seat of the push rod 3;
the sensor 1 is fixedly arranged on the movable upper clamping seat.
As an optimal technical scheme, the straight rod clamping pin 2 is a cylindrical clamping seat with a groove formed in the bottom, the top of the ejector rod 3 is arranged in the groove, the ejector rod 3 can be prevented from moving, the supporting stability is improved, the straight rod clamping pins 2 are provided with two parts, and the two parts are symmetrically arranged on two sides of the first open type clamping ring 4 respectively.
As a preferred technical scheme, the ejector rod 3 is a telescopic rod and can be adjusted along with the ejection height, so that the universality of the device is further improved.
As a preferred solution, as shown in fig. 5, the second free end face of the first split snap ring 4 is provided on the first free end face, wherein:
a gear guide rail 41 is arranged on the second free end surface, and the extending direction of the gear guide rail 41 is along the circumferential direction of the first buckle type clamping ring;
the first free end surface is provided with a through hole 42 for connecting and fixing with the rotary switch 5;
the fixing device comprises a rotary switch 5 which is used for connecting the first free end surface and the second free end surface and fastening the movable upper clamping seat.
As a preferable mode, as shown in fig. 6, the rotary switch 5 is a gear 52 having a fastening socket 51 and a winding shaft 53 on both end surfaces, wherein:
the fastening clamping seat 51 is in clearance fit with the through hole 42 or an internal thread is arranged in the through hole 42, an external thread is arranged on the outer side of the fastening clamping seat 51, and the first free end face and the second free end face are fixed in a threaded connection mode;
the middle part of the gear is clamped on the gear guide rail 41 and can move back and forth on the gear guide rail 41;
the winding shaft 53 is provided with a plurality of circles of steel wires 6, the steel wires 6 are used for applying downward force to the winding shaft 53 for workers at low positions, the fastening of the first open type clamping ring 4 is achieved through the integral rotation of the rotary switch 5, and the steel wires 6 are high in strength and not prone to breaking.
As a preferable technical solution, the first open type snap ring 4 is a steel strip with elasticity, and under the action of canceling the external force, the steel strip is loosened under the action of its own elasticity to return to the original position.
As a preferred technical solution, the first free end surface of the second open type snap ring 7 is disposed on the second free end surface, and a fastening switch 10 is further disposed between the first free end surface and the second free end surface for fastening and fixing the lower clamping base.
As a preferred technical scheme, a magic buckle 11 is further arranged between the first free end surface and the second free end surface of the second open type snap ring 7.
A method of using a fixture for testing fundamental frequency at a flexible cable structure 1/3, comprising the steps of:
step 3, fixed movable upper clamping seat, fixed lower clamping seat, accomplish sensor 1's fixed, it is specific, fixed lower clamping seat fixed realize through fastening switch 10, movable lower clamping seat fixed as: the staff stimulates steel wire 6, and rotary switch 5 rotates and moves along gear guide 41 under the effort of steel wire 6 to the tightening up of cassette in the realization activity, after the staff that is in the low department can't stimulate steel wire 6, fixes the lower extreme winding of steel wire 6 on fixed lower cassette, realizes the fixed of cassette in the activity.
As a preferred technical scheme, the method also comprises a step 4, after the test is finished, the movable upper clamping seat and the fixed lower clamping seat are loosened, the push rod 3 is disassembled, so that the movable upper clamping seat slides to the lower part, and the disassembly of the movable upper clamping seat and the fixed lower clamping seat is finished.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A fixture for testing the fundamental frequency at a flexible cable structure 1/3, comprising:
the movable upper clamping seat comprises a first open type clamping ring (4), a straight rod clamping pin (2) arranged on the first open type clamping ring (4) and a fixing device for fastening the first open type clamping ring (4);
the fixed lower clamping seat comprises a second open type clamping ring (7) and a straight rod buckle (9) arranged on the second open type clamping ring (7);
one end of the push rod (3) can be arranged in the straight rod clamping pin (2), and the other end of the push rod (3) can be clamped in the straight rod clamping buckle (9) and used for pushing the movable upper clamping seat to move up and down;
the sensor (1) is fixedly arranged on the movable upper clamping seat;
the second free end face of first open type snap ring (4) sets up on first free end face, wherein:
a gear guide rail (41) is arranged on the second free end surface, and the extending direction of the gear guide rail (41) is along the directionThe first mentioned One opening type snap ring (4)The circumferential direction of (a);
a through hole (42) is arranged on the first free end surface;
the fixing device comprises a rotary switch (5) which is used for connecting the first free end surface and the second free end surface and fastening the movable upper clamping seat.
2. The fixing device for testing the fundamental frequency at the position 1/3 of the flexible cable structure according to claim 1, wherein the straight rod clamping pin (2) is a cylindrical clamping seat with a groove at the bottom, and two straight rod clamping pins (2) are arranged and symmetrically arranged on two side surfaces of the first open type clamping ring (4).
3. The fixture for testing the fundamental frequency at a flexible cable structure 1/3 according to claim 1, wherein the ejector pin (3) is a telescopic rod.
4. The fixture for testing fundamental frequency at a flexible cable structure 1/3 according to claim 1, wherein the rotary switch (5) is a gear (52) with two end faces respectively provided with a fastening clamping seat (51) and a winding shaft (53), and wherein:
the fastening clamping seat (51) is in clearance fit with the through hole (42) and is used for fixing the first free end face and the second free end face;
the middle part of the gear is clamped on the gear guide rail (41) and can move back and forth on the gear guide rail (41);
the winding shaft (53) is provided with a plurality of circles of steel wires (6).
5. The fixture for testing the fundamental frequency at the flexible cable structure 1/3 as claimed in claim 1, wherein the first free end face of the second split snap ring (7) is disposed on the second free end face, and a fastening switch (10) is further disposed between the first free end face and the second free end face for fastening the fixed lower clamping seat.
6. The fixture for testing the fundamental frequency at the flexible cable structure 1/3 as claimed in claim 5, wherein a magic buckle (11) is further disposed between the first free end surface and the second free end surface of the second split snap ring (7).
7. The fixture for testing the fundamental frequency at the flexible cable structure 1/3 of claim 1, wherein the first split snap ring (4) is a steel strip with elasticity.
8. The method of using a fixture for testing fundamental frequency at a flexible cable structure 1/3 according to claim 1, comprising the steps of:
step 1, pre-fixing the movable upper clamping seat and the fixed lower clamping seat on a flexible cable structure (8) to be detected;
step 2, pushing the movable upper clamping seat to a preset position through the ejector rod (3), and fixing the lower end part of the ejector rod (3) on the fixed lower clamping seat;
and 3, fixing the movable upper clamping seat and the fixed lower clamping seat to finish the fixation of the sensor (1).
9. The use method of the fixing device for testing fundamental frequency at 1/3 of the flexible cable structure as claimed in claim 8, further comprising a step 4 of loosening the movable upper clamping seat and the fixed lower clamping seat after the test is completed, detaching the pushing rod (3) to slide the movable upper clamping seat to the lower part, and completing the detachment of the movable upper clamping seat and the fixed lower clamping seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810652240.8A CN109027622B (en) | 2018-06-22 | 2018-06-22 | Fixing device for testing fundamental frequency at 1/3 position of flexible cable structure and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810652240.8A CN109027622B (en) | 2018-06-22 | 2018-06-22 | Fixing device for testing fundamental frequency at 1/3 position of flexible cable structure and using method |
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| Publication Number | Publication Date |
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| CN109027622A CN109027622A (en) | 2018-12-18 |
| CN109027622B true CN109027622B (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810652240.8A Active CN109027622B (en) | 2018-06-22 | 2018-06-22 | Fixing device for testing fundamental frequency at 1/3 position of flexible cable structure and using method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724740B (en) * | 2019-01-12 | 2024-04-16 | 尚廷东 | Cable force measuring device for inhaul cable bridge |
| CN109799011B (en) * | 2019-03-27 | 2020-11-03 | 东南大学 | Suspension bridge hanger rod force measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013056A (en) * | 2006-12-27 | 2007-08-08 | 广州大学 | Steel cable stretching force detecting apparatus |
| CN101644613A (en) * | 2009-08-31 | 2010-02-10 | 国家广播电影电视总局东南广播电视维护中心 | Pulling force tester for stayguy of guyed tower |
| CN102162760A (en) * | 2010-12-29 | 2011-08-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Cable force monitoring device for attached-type stay cable |
| CN105865696A (en) * | 2016-04-29 | 2016-08-17 | 长沙理工大学 | Inhaul cable force change testing device |
| CN106950225A (en) * | 2017-04-17 | 2017-07-14 | 河海大学 | Bridge pier underwater sites damage check travel(l)ing rest and method |
-
2018
- 2018-06-22 CN CN201810652240.8A patent/CN109027622B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013056A (en) * | 2006-12-27 | 2007-08-08 | 广州大学 | Steel cable stretching force detecting apparatus |
| CN101644613A (en) * | 2009-08-31 | 2010-02-10 | 国家广播电影电视总局东南广播电视维护中心 | Pulling force tester for stayguy of guyed tower |
| CN102162760A (en) * | 2010-12-29 | 2011-08-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Cable force monitoring device for attached-type stay cable |
| CN105865696A (en) * | 2016-04-29 | 2016-08-17 | 长沙理工大学 | Inhaul cable force change testing device |
| CN106950225A (en) * | 2017-04-17 | 2017-07-14 | 河海大学 | Bridge pier underwater sites damage check travel(l)ing rest and method |
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| CN109027622A (en) | 2018-12-18 |
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