CN218847467U

CN218847467U - Cable tension detector

Info

Publication number: CN218847467U
Application number: CN202223227451.8U
Authority: CN
Inventors: 殷立楠; 赵春涛; 刘丽静
Original assignee: Beijing Tianze Electric Power Group Co ltd
Current assignee: Beijing Tianze Power Group Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-04-11
Anticipated expiration: 2032-12-02

Abstract

The application relates to the technical field of cable detection, and discloses a cable tension detector which comprises a support frame, two positioning parts, a measuring part and a tension sensor, wherein the two positioning parts and the tension sensor are arranged on the support frame; during working, the cable to be measured is placed between the two positioning parts and the measuring part, the adjustable positioning part is moved to the clamping position from the opening position, the cable to be measured can be pressed on the measuring part, and the tension sensor collects the force applied to the measuring part by the cable to be measured. The detector of this application has simple structure and convenient operation's characteristics.

Description

Cable tension detector

Technical Field

The application relates to the technical field of cable detection, in particular to a cable tension detector.

Background

The cable is an important member for bearing tensile force in engineering structures, and is widely used in railway contact systems, national power grids, elevators, hoisting and transportation equipment and bridge cableway structures due to light weight and high tensile strength and toughness. Tension borne by the cable in the working process is an important factor influencing safe operation of equipment, and once the tension of the cable is changed due to fatigue and abrasion, the bearing capacity of the cable is reduced, and the safety of life and property is directly related.

The electric locomotive is in sliding contact with a contact net through a pantograph at the top of the electric locomotive in the running process, so that electric power is transmitted to the interior of the locomotive to drive the train to run. In order to ensure the running safety of the train, the cable of the contact network needs to have certain tension, so that the cable is prevented from sagging, the cable is basically parallel to the rail, and the pantograph is ensured to be always in good contact with the cable of the contact network. At present, a cable of a contact network compensates the tension of the cable through a contact network tension compensation device, so that the tension of the cable is kept basically constant; the contact net tension compensation device consists of a pulley block and an attached balancing weight, the balancing weight with different weights is added according to the tension to be compensated, and the cable is tensioned under the action of the pulley block. The pulley block is located outdoor environment, and long-term wind blows and drenches to lead to it to take place the corrosion ageing very easily to can produce great frictional resistance, finally lead to the tension of cable to descend, influence the safe operation of train. Therefore, in actual work, it is necessary to periodically detect the tension of the cable, and when the tension of the cable changes, the weight block is increased or decreased to keep the tension of the cable constant.

At present, the tension detection of cable is mainly through tension sensor, and the most common tension sensor is side pressure formula tension sensor, chinese utility model patent as application number 201721131683.X discloses a contact net tension monitoring device, and it relates to measures the tension magnitude value through the "three point bending method" that adopts side pressure formula tension sensor to railway contact net, but this monitoring device has technical problem such as structure complicacy, bulky, weight is heavy, the precision is poor and the installation is loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cable tension detector that aims at remedying prior art weak point, provides a simple structure and convenient operation.

In order to solve the technical problem, the following technical scheme is adopted in the application:

a cable tension detector comprises a support frame, two positioning parts, a measuring part and a tension sensor, wherein the two positioning parts and the tension sensor are arranged on the support frame along the length direction of a cable to be measured;

the positioning part can move between an opening position and a clamping position under the driving of the driving mechanism and is defined as an adjustable positioning part, when the adjustable positioning part is in the opening position, the adjustable positioning part is far away from the cable to be tested, and when the adjustable positioning part is in the clamping position, the adjustable positioning part is close to and extrudes the cable to be tested;

when the cable clamp works, the cable to be measured is arranged between the two positioning parts and the measuring part, the driving mechanism drives the adjustable positioning parts to move from the opening position to the clamping position, so that the cable to be measured is pressed on the measuring part and is collected by the tension sensor, and the force applied to the measuring part by the cable to be measured is applied to the measuring part.

Further, the adjustable detent is locked when the adjustable detent is at least in the open position and the clamped position.

Further, the driving mechanism includes, but is not limited to, a cylinder, a motor, and a toggle member.

Further, when the driving mechanism is an air cylinder, an oil cylinder or a motor, the adjustable positioning part is arranged at the output end of the driving mechanism, and the adjustable positioning part is controlled and locked by the driving mechanism when being positioned at the opening position and the clamping position.

Further, when the driving mechanism is a toggle member, the adjustable positioning portion is mounted on the support frame through a moving mechanism, the moving mechanism includes a connecting shaft and a main shaft, the connecting shaft and the main shaft are eccentrically disposed, the adjustable positioning portion is disposed on the connecting shaft, the main shaft is rotatably disposed on the support frame, the toggle member is indirectly connected with the main shaft through the connecting shaft or directly connected with the main shaft through the toggle member, and the toggle member is toggled to drive the adjustable positioning portion to rotate around a central axis of the main shaft, so as to move the adjustable positioning portion between an opening position and a clamping position.

Further, when actuating mechanism is for dialling the piece, adjustable positioning portion is locked at open position and clamping position through locking mechanical system, locking mechanical system is including a plurality of bulb plunger and a plurality of constant head tank that cooperate and use, the bulb plunger sets up on the support frame just the constant head tank sets up on the periphery wall of main shaft or the bulb plunger sets up on the periphery wall of main shaft just the constant head tank sets up on the support frame, when adjustable positioning portion rotates open position and clamping position, the bulb plunger card is gone into just extremely in the constant head tank, in order to realize adjustable positioning portion is locked when open position and clamping position.

Further, the adjustable positioning part can only move between the opening position and the clamping position through the limitation of the limiting mechanism; the limiting mechanism comprises a limiting column and a limiting groove which are matched with each other; the limiting column is arranged on the supporting frame and the limiting groove is arranged on the main shaft or the limiting column is arranged on the main shaft and the limiting groove is arranged on the supporting frame; the limiting column can only relatively slide between a first limiting position and a second limiting position of the limiting groove, so that the adjustable positioning part can only swing between an opening position and a clamping position around the central axis of the main shaft.

Further, when the limiting column abuts against the first limiting position, the adjustable positioning portion is located at the opening position and locked, and when the limiting column abuts against the second limiting position, the adjustable positioning portion is located at the clamping position and locked.

Furthermore, the two positioning parts and the measuring part are guide wheels, or grooves matched with the outer surface of the cable to be measured are formed in the two positioning parts and the measuring part, or at least grooves matched with the outer surface of the cable to be measured are formed in the measuring part.

Further, a handle is arranged on the tension sensor or the support frame.

Compared with the prior art, the beneficial effect of this application is:

1. the detector comprises a support frame, two positioning parts, a measuring part and a tension sensor, wherein the two positioning parts and the measuring part form three action points for a cable to be measured; the detector of this application has simple structure and convenient operation's characteristics.

2. According to the cable tension measuring device, the first groove is formed in the measuring part, the first groove has a certain length, the contact area between the first groove and a cable to be measured is increased, the measuring part can be in line contact or surface contact through the first groove and the cable to be measured, the contact between the measuring part and any section of the cable to be measured can be consistent, and the problem that the tension measuring precision is low due to the fact that the surface of the cable to be measured is uneven can be solved; in addition, be provided with the second recess in two location portions in this application, make also adopt line contact or the face contact that the multiple spot contact constitutes between two location portions and the cable that awaits measuring through the second recess, can further improve the tension measurement accuracy of detector like this.

3. The operation is carried out in a manual operation mode, and the structural design of the poking piece, the moving mechanism and the locking mechanism is adopted, so that the operation tool has the characteristics of simple structure, simplicity and convenience in operation and the like.

4. Stop gear has injectd the range of movement of adjustable positioning portion in this application, can cooperate the use with locking mechanical system, can realize stirring and locking of adjustable positioning portion between open position and clamping position fast accurately.

5. Two location portions are adjustable location portion in this application, can satisfy the tension measurement demand of the cable that awaits measuring of different diameters, have characteristics such as application scope extensively.

Drawings

In order that the advantages of the application will be readily understood, a more particular description of the application briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the application and are not therefore to be considered to be limiting of its scope, the application will be described and explained with additional specificity and detail through the use of the accompanying drawings.

FIG. 1 is a schematic perspective view of a cable tension detector according to the present application;

FIG. 2 is a schematic front view of the cable tension tester of the present application;

FIG. 3 is a schematic perspective view of a measuring section according to the present application;

FIG. 4 is a schematic view of a connection structure between a measuring part and a tension sensor in the present application;

fig. 5 is a schematic view of a connection structure between the adjustable positioning portion and the supporting frame in the present application;

FIG. 6 is a schematic view of the connection structure between the connection shaft and the main shaft in the present application;

fig. 7 is a schematic structural diagram of a limiting mechanism between a main shaft and a support frame in the present application.

The reference numbers are as follows:

1-a support frame;

2-a locating portion, 201-a second groove;

3-measuring part, 301-first groove;

4-a tension sensor;

5-a handle;

6-a deflector rod;

7-shifting blocks;

8-connecting the shaft;

9-a main shaft;

10-ball plunger;

11-a positioning groove;

12-a limiting column;

13-a limit groove, 1301-a first limit position, 1302-a second limit position.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the embodiments of the present application may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the embodiments of the present application.

In the following description, a detailed structure will be presented for a thorough understanding of the embodiments of the present application. It is apparent that the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the present application, however, may have other embodiments in addition to those detailed.

In the description of the present application, the term "a and/or B" denotes all possible combinations of a and B, such as a alone, B alone or a and B, and the term "at least one a or B" or "at least one of a and B" means similar to "a and/or B" and may include a alone, B alone or a and B; the singular forms "a", "an" and "the" may include the plural forms as well; the terms "inboard," "outboard," "longitudinal," "lateral," "upper," "lower," "top," "bottom," and the like refer to an orientation or positional relationship that is based on the orientation or positional relationship shown in the drawings and is for convenience in describing the present application only and does not require that the present application be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the present application; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The application provides a cable tension detector, including support frame 1, two location portion 2, measuring part 3 and tension sensor 4. The two positioning parts 2 and the tension sensor 4 are arranged on the support frame 1 along the length direction of the cable to be measured, the measuring part 3 is arranged at the measuring end of the tension sensor 4, the measuring part 3 is positioned between the two positioning parts 2, the two positioning parts 2 are arranged at the same side of the cable to be measured at intervals, the measuring part 3 and the two positioning parts 2 are arranged at two sides of the cable to be measured in a staggered mode relatively, namely the two positioning parts 2 and the measuring part 3 form three action points for the cable to be measured; the positioning part 2 can move between an opening position and a clamping position under the driving of the driving mechanism, the positioning part 2 is defined as an adjustable positioning part, when the adjustable positioning part is at the opening position, the adjustable positioning part is far away from the cable to be tested, and when the adjustable positioning part is at the clamping position, the adjustable positioning part is close to and extrudes the cable to be tested; during operation, the cable that awaits measuring is put into between two location portion 2 and measuring part 3, drives adjustable location portion through actuating mechanism and removes to clamping position by open position to press the cable that awaits measuring on measuring part 3 and gather the power that the cable that awaits measuring applyed for measuring part 3 by tension sensor 4, through the data of the power of gathering and through the analysis and calculation alright measure the tension of cable. The tension sensor 4 is a tension sensor 4 for wires, a measuring shaft extends out of the measuring end of the tension sensor 4, the measuring part 3 can be mounted on the measuring shaft through a bearing, and the tension of the cable is measured by collecting the force borne by the measuring part 3; the tension sensor 4 is also connected to a dedicated amplifier (such as a digital display device) by data lines or wirelessly, and displays, transmits, and stores the measured data.

Embodiments of the present application are described in further detail below with reference to the attached drawing figures:

example one

Referring to fig. 1 to 7, the present embodiment provides a cable tension detecting instrument, which includes a supporting frame 1, two positioning portions 2, a measuring portion 3 and a tension sensor 4. One positioning part 2 is an adjustable positioning part, the other positioning part 2 is fixedly connected with the support frame 1, and the positioning part 2 is defined as a fixed positioning part; the adjustable positioning part and the fixed positioning part are respectively arranged at two ends of the support frame 1, and the tension sensor 4 and the measuring part 3 are arranged in the middle of the support frame 1. During operation, the cable to be measured is put between fixed position portion and measuring part 3, later moves to clamping position by opening the position through actuating mechanism control adjustable position portion, and adjustable position portion is close to and extrudes the cable to be measured to under the cooperation of fixed position portion, make the cable to be measured press on measuring part 3 and gather the cable to be measured by tension sensor 4 and apply the power for measuring part 3.

As a further improvement of this embodiment, the driving mechanism includes, but is not limited to, an air cylinder, an oil cylinder, a motor, and a toggle member; wherein, the shifting piece can be a shifting rod 6, a shifting block 7 and the like. Further, the adjustable detent is locked when the adjustable detent is in at least the open position and the clamped position.

When the driving mechanism is an air cylinder, an oil cylinder or a motor, the driving mechanism is relatively fixedly connected with the support frame 1, the adjustable positioning part is arranged at the output end of the driving mechanism, and the adjustable positioning part is controlled and locked by the driving mechanism when being positioned at the opening position and the clamping position.

When the driving mechanism is a shifting piece, the shifting piece is specifically a shifting rod 6, the adjustable positioning part is installed on the support frame 1 through the moving mechanism, and one embodiment of the moving mechanism can be as follows: the moving mechanism comprises a connecting shaft 8 and a main shaft 9, the connecting shaft 8 and the main shaft 9 are eccentrically arranged, an adjustable positioning part is arranged on the connecting shaft 8, the main shaft 9 is rotatably arranged on the support frame 1, the stirring part and the main shaft 9 are fixedly connected indirectly or directly, preferably, the stirring part is connected with the main shaft 9 through the connecting shaft 8, and the stirring part and the main shaft 9 are respectively arranged at two ends of the connecting shaft 8; the toggle piece is toggled to drive the adjustable positioning part to rotate around the central axis of the main shaft 9, so that the adjustable positioning part can move between the opening position and the clamping position.

The connection between the adjustable positioning portion and the connection shaft 8 may be relatively fixed, relatively rotatable, or locked after relatively rotating. Specifically, the fixed connection mode of the adjustable positioning portion and the connection shaft 8 may be welding or clamping; the relative rotation connection mode of the adjustable positioning part and the connecting shaft 8 can be that the adjustable positioning part is arranged on the connecting shaft 8 through a bearing; the connection mode of relative rotation of the adjustable positioning part and the connecting shaft 8 and then locking can be that the adjustable positioning part is rotatably sleeved on the connecting shaft 8, and after the adjustable positioning part rotates to a corresponding angle, the adjustable positioning part is connected to the connecting shaft 8 through a nut thread and is pressed and locked by the nut.

The end of the support frame 1 is provided with a shaft groove for the spindle 9 to rotate in, the spindle 9 is mounted in the shaft groove, and then the end cover is used to limit the spindle 9 in the shaft groove, only the spindle 9 is allowed to rotate, and finally the spindle 9 and the support frame 1 are rotatably connected.

When the driving mechanism is a toggle member, specifically, the toggle member 6, the adjustable positioning portion is locked in the open position and the clamping position by the locking mechanism. One embodiment of the locking mechanism may be: the locking mechanism comprises a plurality of ball plunger 10 and a plurality of positioning grooves 11 which are matched with each other, preferably, two ball plungers 10 are provided, and two positioning grooves 11 are provided; the ball plungers 10 and the positioning grooves 11 are respectively arranged on the outer peripheral walls of the support frame 1 and the main shaft 9, preferably, two ball plungers 10 are oppositely arranged on the support frame 1, and two positioning grooves 11 are oppositely arranged on the outer peripheral wall of the main shaft 9; when the adjustable positioning portion is rotated to the opening position and the clamping position, both ball plungers 10 can be just snapped into the two positioning slots 11, so that the adjustable positioning portion is locked in the opening position and the clamping position. Another embodiment of the locking mechanism may be: be provided with elasticity clamp and bolt on support frame 1, the outside at main shaft 9 is embraced to the elasticity clamp, and the bolt supports the outside at the elasticity clamp, can make the elasticity clamp embrace tightly on main shaft 9 through the precession bolt, utilizes the friction between elasticity clamp and the main shaft 9 can make between main shaft 9 and the support frame 1 relatively fixed to the realization is to the locking of main shaft 9. Of course, the locking mechanism is not limited to the above structure, and may be a jack screw connected to the support frame 1 and acting on the main shaft 9, or another locking mechanism capable of locking the main shaft 9 to the support frame 1 after the main shaft 9 rotates.

In this embodiment, the detector adopts a manual operation mode to operate, adopts the structural design of the toggle piece, the moving mechanism and the locking mechanism, and has the characteristics of simple structure, simple and convenient operation and the like.

As a further improvement of the present embodiment, the adjustable positioning portion is only movable between the open position and the clamping position by the restriction of the position restricting mechanism. The specific structure of the limiting mechanism can be as follows: the limiting mechanism comprises a limiting column 12 and a limiting groove 13 which are matched with each other; the limiting column 12 and the limiting groove 13 are respectively arranged on the support frame 1 and the main shaft 9, preferably, the limiting column 12 is a limiting bolt and is in threaded connection with the back end face of the main shaft 9, the limiting groove 13 is formed in the shaft groove of the support frame 1, and the limiting groove 13 is designed into an arc-shaped groove; the stopper post 12 is relatively slidable only between the first and second restricting

positions

1301 and 1302 of the stopper groove 13, so that the adjustable positioning portion can swing only about the central axis of the main shaft 9 between the open position and the clamping position. In operation, when the limiting post 12 abuts against the first limiting position 1301, the adjustable positioning portion is located at the opening position and locked, and when the limiting post 12 abuts against the second limiting position 1302, the adjustable positioning portion is located at the clamping position and locked. The limiting mechanism limits the moving range of the adjustable positioning part, can be matched with the locking mechanism for use, and can quickly and accurately realize the shifting and locking of the adjustable positioning part between the opening position and the clamping position.

As a further improvement of this embodiment, two location portions 2 and measurement portion 3 are guide wheels, or two location portions 2 and measurement portion 3 are all provided with the recess that matches with the surface of the cable that awaits measuring, or at least measurement portion 3 is provided with the recess that matches with the surface of the cable that awaits measuring. Preferably, two positioning portions 2 and measuring portion 3 are provided with grooves matched with the outer surface of the cable to be measured, and the grooves include a first groove 301 and a second groove 201.

During operation, the cable to be measured is abutted to the measuring part 3 and multi-point contact is adopted between the cable to be measured and the measuring part 3, and the multi-point contact can form line contact or surface contact between the cable to be measured and the measuring part. Specifically, the measuring portion 3 is provided with a first groove 301, the first groove 301 is a first preset length according to the length of the cable to be measured extending in the length direction, when the cable to be measured is in operation, the cable to be measured is placed in the first groove 301, and the first preset length allows the cable to be measured and the first groove 301 to be in multi-point contact. Wherein, first recess 301 has certain length (first predetermined length), has increased the area of contact between first recess 301 and the cable that awaits measuring for measuring portion 3 adopts the multiple spot contact through adopting between first recess 301 and the cable that awaits measuring, and the multiple spot contact can constitute the line contact or the face contact between the cable that awaits measuring and measuring portion 3, can guarantee that the contact between measuring portion 3 and the cable that awaits measuring any section is unanimous, and then can solve the problem that causes tension measurement accuracy low because of the cable surface unevenness that awaits measuring.

Wherein, during operation, adopt multiple spot contact between two location portion 2 and the cable that awaits measuring, and multiple spot contact can constitute the line contact or the face contact between cable and the location portion 2 that awaits measuring. Specifically, two location portions 2 are provided with second groove 201 respectively, and the length that second groove 201 extends according to the length direction of the cable that awaits measuring is the second length of predetermineeing, and the during operation, the cable that awaits measuring is put into in second groove 201, and the second length of predetermineeing allows to adopt the multiple spot contact between cable that awaits measuring and the second groove 201. Wherein, second recess 201 has certain length, has increased the area of contact between second recess 201 and the cable that awaits measuring for two location portion 2 adopt the multiple spot contact through adopting between second recess 201 and the cable that awaits measuring, and the multiple spot contact can constitute the line contact or the face contact between cable that awaits measuring and location portion 2, and the measuring part 3 of deuterogamying with the cable line contact or the face contact that awaits measuring can further improve the tension measurement accuracy of detector.

As a further improvement of the present embodiment, in order to facilitate the use of the entire detecting apparatus, a handle 5 may be provided on the tension sensor 4 or the supporting frame 1; can be convenient take and use cable tension detection device through handheld handle 5.

Example two

Referring to fig. 1 and fig. 2, the present embodiment is a further improvement of the first embodiment, and the main difference between the present embodiment and the first embodiment is that: both positioning portions 2 are adjustable positioning portions.

Specifically, one of the adjustable positioning portions is mounted at one end of the support frame 1, the adjustable positioning portion is movable and allows the gap between the adjustable positioning portion and the measuring portion 3 to be adjusted, and the cables to be measured with different diameters can be clamped between the adjustable positioning portion and the measuring portion 3 through the adjustment of the gap, so that the requirement of measuring the tension of the cables to be measured with different diameters can be met; the driving mechanism of the adjustable positioning part adopts a shifting part, the shifting part is specifically a shifting block 7, the shifting block 7 is directly fixed on the back of a main shaft 9, and the main shaft 9 can be directly driven to rotate relative to the support frame 1 by rotating the shifting block 7; the adjustable positioning part is installed on the support frame 1 through the moving mechanism and the locking mechanism in the first embodiment, and the structure is different from that in the first embodiment: ball plunger 10 is one or two in locking mechanical system, and constant head tank 11 can be designed into a plurality ofly according to the demand of mediation, through the switching of ball plunger 10 between a plurality of constant head tanks 11, can realize the locking of this adjustable positioning portion in a plurality of different positions to do benefit to the cable that awaits measuring that adapts to more different diameters, enlarge the application scope of device.

The other adjustable positioning part is arranged at the other end of the support frame 1 and used for extruding the cable to be measured and promoting the cable to be measured to press the measuring part 3 so as to complete tension measurement of the cable to be measured, and the adjustable positioning part is consistent with the adjustable positioning part in the first embodiment in structure and effect.

In this embodiment, two location portions 2 are adjustable location portions, can satisfy the tension measurement demand of the cable that awaits measuring of different diameters, have characteristics such as application scope extensively.

While there have been shown and described what are at present considered the fundamental principles and essential features of the application and its advantages, it will be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics of the application. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A cable tension detector is characterized by comprising a support frame, two positioning parts, a measuring part and a tension sensor, wherein the two positioning parts and the tension sensor are arranged on the support frame along the length direction of a cable to be measured;

during working, the cable to be measured is arranged between the two positioning parts and the measuring part, the driving mechanism drives the adjustable positioning part to move from the opening position to the clamping position, so that the cable to be measured is pressed on the measuring part and is collected by the tension sensor, and the force applied to the measuring part by the cable to be measured is applied.

2. The cable tension monitor of claim 1, wherein the adjustable detent is locked when the adjustable detent is in at least an open position and a clamped position.

3. The cable tension detector according to claim 1 or 2, wherein the drive mechanism includes, but is not limited to, an air cylinder, an oil cylinder, an electric motor, a toggle member.

4. The cable tension detector according to claim 3, wherein the adjustable positioning portion is provided at the output end of the drive mechanism when the drive mechanism is an air cylinder, an oil cylinder or an electric motor, and the adjustable positioning portion is controlled to be locked by the drive mechanism when the adjustable positioning portion is in the open position and the clamping position.

5. The cable tension tester according to claim 3, wherein when the driving mechanism is a toggle member, the adjustable positioning portion is mounted on the supporting frame by a moving mechanism, the moving mechanism includes a connecting shaft and a main shaft, the connecting shaft is disposed eccentrically to the main shaft, the adjustable positioning portion is disposed on the connecting shaft, the main shaft is rotatably disposed on the supporting frame, the toggle member is indirectly connected to the main shaft through the connecting shaft or directly connected to the main shaft through the toggle member, and the toggle member is toggled to drive the adjustable positioning portion to rotate around a central axis of the main shaft, so as to move the adjustable positioning portion between the open position and the clamping position.

6. A cable tension tester as claimed in claim 5, wherein when the drive mechanism is a toggle member, the adjustable detent is locked in the open and clamped positions by a locking mechanism comprising a plurality of ball plungers and a plurality of detents cooperating, the ball plungers being provided on the support frame and the detents being provided on the peripheral wall of the spindle or the ball plungers being provided on the peripheral wall of the spindle and the detents being provided on the support frame, the ball plungers just snapping into the detents when the adjustable detent is pivoted to the open and clamped positions to effect locking of the adjustable detent in the open and clamped positions.

7. The cable tension tester of claim 6, wherein the adjustable positioning portion is only movable between an open position and a clamped position by being constrained by a limiting mechanism; the limiting mechanism comprises a limiting column and a limiting groove which are matched with each other; the limiting column is arranged on the supporting frame and the limiting groove is arranged on the main shaft or the limiting column is arranged on the main shaft and the limiting groove is arranged on the supporting frame; the limiting column can only relatively slide between a first limiting position and a second limiting position of the limiting groove, so that the adjustable positioning part can only swing between an opening position and a clamping position around the central axis of the main shaft.

8. The cable tension tester of claim 7, wherein the adjustable positioning portion is in an open position and locked when the stop post abuts in a first limit position, and the adjustable positioning portion is in a clamped position and locked when the stop post abuts in a second limit position.

9. The cable tension detector according to claim 1, wherein the two positioning portions and the measuring portion are guide wheels, or grooves matched with the outer surface of the cable to be detected are provided on the two positioning portions and the measuring portion, or at least grooves matched with the outer surface of the cable to be detected are provided on the measuring portion.

10. The cable tension monitor of claim 1, wherein a handle is provided on the tension sensor or the support bracket.