CN219776590U - Auxiliary device for measuring bending radius of cable - Google Patents

Abstract

The utility model discloses an auxiliary device for measuring the bending radius of a cable, and relates to the technical field of power construction equipment. The auxiliary device for measuring the bending radius of the cable comprises a measuring ruler, wherein two measuring arms which are symmetrically arranged relative to the measuring ruler are arranged on the measuring ruler, and the rear ends of the two measuring arms are in sliding hinge joint with the measuring ruler through a connecting component. The measuring ruler is provided with scales for indicating the distance between the connecting component and the front end of the measuring ruler. A limiting structure is arranged between the measuring ruler and the measuring arm, and the limiting structure determines the maximum opening angle of the measuring arm. The auxiliary device for measuring the bending radius of the cable can conveniently measure the chord length and the arc height of the bending section of the cable, and can be simultaneously suitable for inner side measurement and outer side measurement.

Description

Auxiliary device for measuring bending radius of cable

Technical Field

The utility model relates to the technical field of electric power construction equipment, in particular to an auxiliary device for measuring the bending radius of a cable.

Background

The cable mainly comprises a conductor layer, an insulating layer, a shielding layer and a protective layer. When the cable is bent, the outer side of the cable is stretched, the inner side of the cable is extruded, and the bending part is stressed in a protruding mode due to the combined action of external force and tension. The hidden trouble is greatly increased by keeping the stress point for a long time, and the phenomenon of internal breakage can occur when serious. Thus, the minimum bend radius for cabling and operation is specified in the Power Cable and Cable channel operation and maintenance code.

In the cable laying process, operation and maintenance personnel generally calculate the bending radius of the cable through an empirical visual method, a tape measure method and a mould comparison method. Because the error of the empirical visual method is too large, the number of the die libraries of the die comparison method is huge, and the cost is high, the bending radius of the cable is mostly calculated through the tape measuring method in reality.

The tape measure is to measure the chord length and the arc height of the cable bending section by a tape, and calculate the bending radius of the cable bending section by the measured chord length and the arc height. However, in the traditional measurement mode through the tape, on one hand, measurement is inconvenient, on the other hand, the method is only suitable for measuring the numerical value at the inner side of the curve, and when the inner side space is occupied, accurate measurement of arc height cannot be performed.

Disclosure of Invention

According to the auxiliary device for measuring the bending radius of the cable, which is provided by the utility model, the chord length and the arc height of the bending section of the cable can be conveniently measured, and the auxiliary device can be simultaneously suitable for inner side measurement and outer side measurement.

The technical scheme adopted for solving the technical problems is as follows:

the auxiliary device for measuring the bending radius of the cable comprises a measuring ruler, wherein two measuring arms which are symmetrically arranged relative to the measuring ruler are arranged on the measuring ruler, and the rear ends of the two measuring arms are in sliding hinge joint with the measuring ruler through a connecting component;

the measuring ruler is provided with scales for indicating the distance between the connecting component and the front end of the measuring ruler;

a limiting structure is arranged between the measuring ruler and the measuring arm, and the limiting structure determines the maximum opening angle of the measuring arm.

Further, a chute is formed in the measuring ruler, the connecting assembly comprises a hinge shaft, the hinge shaft is located in the chute and can move in the chute, and a hinge hole matched with the hinge shaft is formed in the rear end of the measuring arm.

Further, the measuring arm comprises a web plate, a first wing plate and a second wing plate are respectively arranged on two sides of the web plate, the first wing plate and the second wing plate form a groove for accommodating the measuring ruler together, a circular hinged plate is arranged at the rear end of the first wing plate, a hinge hole is coaxially arranged on the hinged plate, the rear end face of the second wing plate is an arc-shaped face, and projections of the arc-shaped face and the hinged plate in a horizontal plane are overlapped;

the hinged plates of the two measuring arms are respectively positioned at two sides of the measuring ruler, and the hinged plate of one measuring arm is matched with the arc-shaped surface of the other measuring arm.

Further, a positioning plane is arranged at the rear end of the web, and the measuring arm is in a maximum open state when the positioning plane is attached to the side face of the measuring ruler.

Further, the articulated shaft on be provided with the locating rack, the locating rack including being located riser in the spout, riser's upper and lower both ends are provided with the otic placode respectively, the otic placode on be provided with and be used for holding the connecting hole of articulated shaft, two the measuring arm be located two the otic placode between, be provided with the location slide hole on the otic placode of one side of locating rack, the location slide hole in be provided with the reference column, reference column and location add between be provided with first elastic component, the measuring arm on be provided with first locating hole, and when two the measuring arm is in closed condition, two the first locating hole align, just the reference column pass two in proper order under the effect of first elastic component the first locating hole of measuring arm supports and leans on the otic placode of the opposite side.

Further, the upper end of the positioning column is provided with a hand wheel.

Further, the measuring arms are provided with second positioning holes, and when the two measuring arms are in the maximum open state, the second positioning holes of the two measuring arms are aligned with the positioning columns.

Further, a second elastic piece for preventing the connecting assembly from moving forwards is arranged between the connecting assembly and the measuring ruler.

Further, the second elastic piece is a tension spring, one end of the tension spring is connected with the locating frame, and the other end of the tension spring is connected with the measuring ruler.

Further, a positioning block is arranged on the upper side surface and/or the lower side surface of the measuring ruler, and the rear end of the measuring arm is abutted against the positioning block under the action of the second elastic piece in a free state.

The beneficial effects of the utility model are as follows:

according to the auxiliary device for measuring the bending radius of the cable, the two measuring arms are symmetrically arranged on the measuring ruler, and one ends of the two measuring arms are in sliding hinge connection with the measuring ruler through the connecting component. The auxiliary device for measuring the bending radius of the cable can conveniently measure the chord length and the arc height of the bending section of the cable, and the device can be suitable for the working condition measured on the inner side of the bending section of the cable and the working condition measured on the outer side of the bending section of the cable, so that even if the inner space of the bending section of the cable is immersed, the chord length and the arc height can be conveniently measured from the outer side.

Drawings

Fig. 1 is a schematic perspective view of an auxiliary device for measuring a bending radius of a cable according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is an enlarged schematic view of the portion B of FIG. 1;

FIG. 4 is an enlarged schematic view of the portion C of FIG. 1;

FIG. 5 is a top view of an auxiliary device for measuring a bending radius of a cable according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a cross-sectional view B-B in FIG. 5;

FIG. 8 is a cross-sectional view of the connection between the measuring arm and the measuring scale;

FIG. 9 is a schematic perspective view of a measuring arm;

FIG. 10 is a schematic diagram of a second perspective view of a measuring arm;

FIG. 11 is a schematic perspective view of a positioning frame;

FIG. 12 is a schematic perspective view of a positioning post;

FIG. 13 is a schematic perspective view of a first connector;

FIG. 14 is a schematic perspective view of a second connector;

fig. 15 is a schematic perspective view of an auxiliary device for measuring a bending radius of a cable according to an embodiment of the present utility model;

fig. 16 is a schematic perspective view of an auxiliary device for measuring a bending radius of a cable according to an embodiment of the present utility model in a folded state;

fig. 17 is an enlarged schematic view of the portion D in fig. 16.

In the figure: 1. a measuring ruler; 11. a chute; 12. a second hanging hole; 13. a positioning block;

2. a measuring arm; 21. a web; 211. positioning a plane; 22. a first wing plate; 23. a second wing plate; 231. an arc surface; 24. a hinged plate; 241. a hinge hole; 242. a first positioning hole; 243. a second positioning hole; 244. a reading hole;

3. a connection assembly; 31. a first connector; 311. a first stopper; 312. a hinge shaft; 32. a second connector; 321. a second stopper; 322. a screw;

4. a positioning frame; 41. a vertical plate; 42. ear plates; 421. a connection hole; 43. positioning a sliding hole; 44. positioning the boss; 45. a hooking plate; 451. a first hanging hole;

5. positioning columns; 51. a first shaft section; 52. a second shaft section;

6. a spring;

7. a hand wheel;

8. a tension spring;

9. and (3) a cable.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings in the embodiments of the present utility model, and the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which are obtained without inventive effort by a person skilled in the art on the basis of the embodiments of the present utility model, shall fall within the scope of protection of the present utility model.

For convenience of description, the coordinate system is defined as shown in fig. 1, and the left-right direction is a transverse direction, the front-back direction is a longitudinal direction, and the up-down direction is a vertical direction.

As shown in fig. 1 and 5, an auxiliary device for measuring a bending radius of a cable comprises a measuring scale 1, wherein two measuring arms 2 symmetrically arranged with respect to the measuring scale 1 are arranged on the measuring scale 1, and the rear ends of the two measuring arms 2 are slidably hinged with the measuring scale 1 through a connecting component 3. Namely, the measuring arm 2 can rotate by taking the connecting component 3 as a rotating shaft and can slide relative to the measuring ruler 1.

As a specific embodiment, the measuring scale 1 in this embodiment is provided with a chute 11 extending along the length direction of the measuring scale 1. The connecting assembly 3 comprises a hinge shaft 312, and the hinge shaft 312 is located in the chute 11 and can move in the chute 11. The hinge shaft 312 is provided with a first stop block 311 and a second stop block 321 respectively positioned on the upper side and the lower side of the measuring scale 1. The rear end of the measuring arm 2 is provided with a hinge hole 241 which is matched with the hinge shaft 312, and the first stop block 311 and the second stop block 321 can prevent the measuring arm 2 from sliding off the hinge shaft 312.

Further, for easy assembly and disassembly, as shown in fig. 13 and 14, the first stop block 311 is fixedly connected with one end of the hinge shaft 312 by welding, the second stop block 321 is fixedly provided with a screw 322, and the end surface of the other end of the hinge shaft 312 is provided with a threaded hole matched with the screw 322. Illustratively, the cross section of the stop is in a regular hexagonal structure. The first stopper 311 and the hinge shaft 312 together form the first connection member 31, and the second stopper 321 and the screw 322 together form the second connection member 32.

Further, as shown in fig. 9, the measuring arm 2 includes a web 21, two sides of the web 21 are respectively provided with a first wing plate 22 and a second wing plate 23 extending to one side perpendicular to the wing plates, the web 21, the first wing plate 22 and the second wing plate 23 together form a groove for accommodating the measuring scale 1, and the depth of the groove is equal to half of the width of the measuring scale 1. Thus, as shown in fig. 16, when the two measuring arms 2 are closed, the grooves of the two measuring arms 2 together form a square groove for accommodating the measuring scale 1, and the two measuring arms 2 together form a sleeve-like structure to wrap the measuring scale 1.

As shown in fig. 9, the rear end of the first wing 22 is provided with a circular hinge plate 24, and the hinge hole 241 is formed in the hinge plate 24 and is coaxially disposed with the hinge plate 24. Illustratively, the hinge plate 24 is tangential to the outer side of the web 21 (the side opposite the measuring arms 2). The end surface of the rear end of the second wing plate 23 is an arc-shaped surface 231, and the projection of the arc-shaped surface 231 in the horizontal plane coincides with the projection of the hinge plate 24 in the horizontal plane.

As shown in fig. 5 and 7, when two measuring arms 2 are mounted, the hinge plate 24 of one measuring arm 2 is located above the measuring scale 1, and the hinge plate 24 of the other measuring arm 2 is located below the measuring scale 1, so that the hinge plate 24 of one measuring arm 2 is matched with the arc-shaped surface 231 of the other measuring arm 2, and the two measuring arms 2 do not interfere with each other when relatively rotating.

The measuring scale 1 is provided with a scale for indicating the distance between the hinge shaft 312 and the front end part of the measuring scale 1.

A limiting structure is arranged between the measuring ruler 1 and the measuring arm 2, and the limiting structure determines the maximum opening angle alpha of the measuring arm 2. The maximum opening angle α of the measuring arm 2 is, for example, 45 °.

As a specific embodiment, as shown in fig. 8 and 9, the rear end of the web 21 is provided with a positioning plane 211, and the measuring arm 2 is in a maximally opened state when the positioning plane 211 is attached to the side of the measuring scale 1.

When measuring the chord length and the arc height of the curved section of the cable 9 on the inside, as shown in fig. 5, the measuring arm 2 is first brought to the position of maximum opening angle, and the front end of the measuring scale 1 and the suspended end of the measuring arm 2 are brought into abutment against the cable 9 to be measured. Since the length of the measuring arm 2 is fixed and the maximum opening angle of the measuring arm 2 is fixed, the chord length M of the measured arc is a fixed value which depends on the length and the maximum opening angle of the measuring arm 2, belonging to the property values of the measuring device. As for the arc height, it can be seen from fig. 5 that the arc height is equal to the difference of L1 minus L0 (i.e., L1-L0). Wherein L1 is the distance between the hinge shaft 312 and the front end of the measuring scale 1, and can be obtained by reading the degree on the measuring scale 1, L0 is the projection length of the measuring arm 2 on the measuring scale 1, and is a fixed value, therefore, the arc height of the arc section of the cable 9 to be measured can be obtained by only reading the value of L1 from the measuring scale 1, and is L1-L0.

When measuring the chord length and the arc height of the curved section of the cable 9 on the outside, as shown in fig. 15, the measuring arm 2 is also first brought to the position of maximum opening angle, and the front end of the measuring scale 1 and the suspended end of the measuring arm 2 are both brought into abutment against the cable 9 to be measured. Since the length of the measuring arm 2 is fixed and the maximum opening angle of the measuring arm 2 is fixed, the chord length M of the measured arc segment is a fixed value. As for the arc height, it can be seen from fig. 15 that the arc height is equal to the difference of L0 minus L1 (i.e., L0-L1). Wherein L1 is the distance between the hinge shaft 312 and the front end of the measuring scale 1, and can be obtained by reading the degree on the measuring scale 1, L0 is the projection length of the measuring arm 2 on the measuring scale 1, and is a fixed value, therefore, the arc height of the arc section of the cable 9 to be measured can be obtained by only reading the value of L1 from the measuring scale 1, and is L0-L1.

Further, as shown in fig. 2, 6 and 11, the hinge shaft 312 is provided with a positioning frame 4. The positioning frame 4 comprises a vertical plate 41, the upper end and the lower end of the vertical plate 41 are respectively provided with an ear plate 42 extending to one side, and the ear plate 42 is provided with a connecting hole 421 for accommodating the hinge shaft 312. The vertical plate 41 is positioned in the chute 11 of the measuring scale 1, and the two measuring arms 2 are positioned between the two ear plates 42. Illustratively, the width of the vertical plate 41 is equal to the width of the chute 11, the vertical plate 41 has an arc structure coaxially arranged with the hinge plate 24, and the inner side surface of the vertical plate 41 is attached to the outer cylindrical surface of the hinge plate 24.

The locating rack 4 be provided with the location slide hole 43 that extends along vertical direction on being located the otic placode 42 of upside, location slide hole 43 in be provided with can follow location slide hole 43 the reference column 5 that slides from top to bottom, reference column 5 and locating rack 4 between be provided with and be used for hindering the reference column 5 the first elastic component that upwards moves.

The hinge plates 24 of the measuring arms 2 are provided with first positioning holes 242, when the two measuring arms 2 are in a closed state, the first positioning holes 242 of the two measuring arms 2 are aligned, and the lower end surfaces of the positioning posts 5 sequentially pass through the two first positioning holes 242 to abut against the ear plates 42 positioned on the lower side under the elastic force of the first elastic piece.

As a specific embodiment, as shown in fig. 6 and 12, the positioning column 5 in this embodiment is in a stepped shaft shape, and includes a first shaft section 51 and a second shaft section 52 sequentially from top to bottom, where the diameter of the first shaft section 51 is smaller than the diameter of the second shaft section 52. The cylindrical side surface of the positioning slide hole 43 is provided with a positioning boss 44 with an annular structure. The first elastic piece is a spring 6, the spring 6 is sleeved on the first shaft section 51 of the positioning column 5, the upper end of the spring 6 abuts against the positioning boss 44, and the lower end of the spring 6 abuts against a step surface between the first shaft section 51 and the second shaft section 52.

Further, for convenience in operation, a hand wheel 7 is disposed at the upper end of the positioning column 5, and the hand wheel 7 is fixedly connected with the positioning column 5 through a set screw.

Further, as shown in fig. 5, 6 and 10, the hinge plate 24 is further provided with a second positioning hole 243, when the two measuring arms 2 are in the maximum open state, the second positioning holes 243 of the two measuring arms 2 are aligned, and the lower end surface of the positioning post 5 sequentially passes through the two second positioning holes 243 to abut against the ear plate 42 located at the lower side under the elastic force of the first elastic member. By providing the second positioning hole 243, the measuring arm 2 can be fixed at the position of the maximum opening angle, so that the measuring inaccuracy caused by the position movement of the measuring arm 2 in the measuring process can be avoided.

Further, a second elastic member for blocking the forward movement of the connecting assembly 3 is arranged between the connecting assembly 3 and the measuring scale 1.

As a specific embodiment, as shown in fig. 2 and fig. 4, the second elastic member is a tension spring 8, one end of the tension spring 8 is connected with the positioning frame 4, and the other end of the tension spring 8 is connected with the measuring ruler 1. Illustratively, a hooking plate 45 is disposed on an outer side surface of the vertical plate 41 of the positioning frame 4, a first hooking hole 451 is disposed on the hooking plate 45, a second hooking hole 12 is disposed at a rear end portion of the measuring scale 1, one end of the tension spring 8 is hooked on the first hooking hole 451, and the other end of the tension spring 8 is hooked on the second hooking hole 12.

During measurement, the positioning column 5 is pulled upwards firstly to separate the positioning column 5 from the first positioning hole 242 on the measuring arm 2, then the measuring arm 2 is rotated to enable the measuring arm 2 to rotate to the maximum open state, and then the positioning column 5 is released, at this time, the positioning column 5 can be inserted into the second positioning hole 243 under the action of the spring 6, and positioning of the measuring arm 2 is achieved. Then the front end of the measuring ruler 1 is abutted against the cable 9 to be measured, the measuring arm 2 is pushed forward until the measuring arm 2 is abutted against the cable 9 to be measured, and then the numerical value on the measuring ruler 1 is read.

Further, the tension spring 8 is positioned in the chute 11.

Further, as shown in fig. 3, the measuring scale 1 is provided with a positioning block 13 on the upper side and the lower side of the measuring arm 2, and the side of the positioning block 13 facing the measuring arm 2 is an arc surface matching with the hinge plate 24. As shown in fig. 16 and 17, in the free state, the articulated end of the measuring arm 2 rests against the positioning block 13 under the action of the second elastic element.

Here, the positioning block 13 may be provided only on the upper side or the lower side of the measuring scale 1.

Further, as shown in fig. 2 and 7, the hinge plate 24 of the measuring arm 2 is provided with a reading hole 244, and when the measuring arm 2 is at the maximum opening angle, the connecting line between the reading hole 244 and the center of the hinge hole 241 is perpendicular to the measuring scale 1. The scale (not shown) provided on the measuring scale 1 can be read through the reading hole 244.

Illustratively, scales are provided on the measuring scale 1 at two sides of the chute 11, correspondingly, two reading holes 244 are provided on the hinge plate 24, and when the measuring arm 2 is at the maximum opening angle, the two reading holes 244 are respectively located at two sides of the chute 11.

On the basis of the embodiment provided by the utility model, other embodiments obtained by combining, splitting, recombining and other means of the embodiment of the utility model do not exceed the protection scope of the utility model.

The foregoing detailed description of the embodiments of the present utility model has been provided for the purpose of illustrating the purposes, technical solutions and advantages of the embodiments of the present utility model, and is not intended to limit the scope of the embodiments of the present utility model, i.e., any modifications, equivalent substitutions, improvements, etc. made on the basis of the embodiments of the present utility model should be included in the scope of the embodiments of the present utility model.

Claims (10)

1. An auxiliary device for measuring the bending radius of a cable, which is characterized in that: the measuring device comprises a measuring ruler (1), wherein two measuring arms (2) symmetrically arranged relative to the measuring ruler (1) are arranged on the measuring ruler (1), and the rear ends of the two measuring arms (2) are in sliding hinge joint with the measuring ruler (1) through a connecting component (3);

the measuring ruler (1) is provided with scales for indicating the distance between the connecting component (3) and the front end of the measuring ruler (1);

a limiting structure is arranged between the measuring ruler (1) and the measuring arm (2), and the limiting structure determines the maximum opening angle of the measuring arm (2).

2. A cable bend radius measurement assistance apparatus according to claim 1, wherein: the measuring ruler (1) is provided with a chute (11), the connecting assembly (3) comprises a hinge shaft (312), the hinge shaft (312) is located in the chute (11) and can move in the chute (11), and the rear end of the measuring arm (2) is provided with a hinge hole (241) matched with the hinge shaft (312).

3. A cable bend radius measurement assistance apparatus according to claim 2, wherein: the measuring arm (2) comprises a web plate (21), wherein a first wing plate (22) and a second wing plate (23) are respectively arranged on two sides of the web plate (21), the first wing plate (22) and the second wing plate (23) form a groove for accommodating the measuring ruler (1), a circular hinge plate (24) is arranged at the rear end of the first wing plate (22), a hinge hole (241) is coaxially arranged on the hinge plate (24), the rear end face of the second wing plate (23) is an arc-shaped face (231), and projections of the arc-shaped face (231) and the hinge plate (24) in a horizontal plane are overlapped;

the hinge plates (24) of the two measuring arms (2) are respectively positioned at two sides of the measuring ruler (1), and the hinge plate (24) of one measuring arm (2) is matched with the arc-shaped surface (231) of the other measuring arm (2).

4. A cable bend radius measurement assistance apparatus according to claim 3, wherein: the rear end of the web plate (21) is provided with a positioning plane (211), and when the positioning plane (211) is attached to the side face of the measuring ruler (1), the measuring arm (2) is in a maximum open state.

5. A cable bend radius measurement assistance apparatus according to claim 2, wherein: the utility model provides a locating rack (4) are provided with on articulated shaft (312), locating rack (4) including being located riser (41) in spout (11), riser (41) upper and lower both ends be provided with otic placode (42) respectively, otic placode (42) on be provided with and be used for holding connecting hole (421) of articulated shaft (312), two measuring arm (2) be located two otic placode (42) between, one side otic placode (42) of locating rack (4) on be provided with location slide hole (43), location slide hole (43) in be provided with reference column (5), reference column (5) and location add between be provided with first elastic component, measuring arm (2) on be provided with first locating hole (242), and when two measuring arm (2) are in the closed state, two first locating hole (242) align, just reference column (5) in proper order under the effect of first elastic component two measuring arm (242) pass on locating column (42).

6. A cable bend radius measurement assistance apparatus according to claim 5, wherein: the upper end of the positioning column (5) is provided with a hand wheel (7).

7. A cable bend radius measurement assistance apparatus according to claim 5, wherein: the measuring arms (2) are provided with second positioning holes (243), and when the two measuring arms (2) are in the maximum open state, the second positioning holes (243) of the two measuring arms (2) are aligned with the positioning columns (5).

8. A cable bend radius measurement assistance apparatus according to claim 5, wherein: a second elastic piece for preventing the connecting component (3) from moving forwards is arranged between the connecting component (3) and the measuring ruler (1).

9. A cable bend radius measurement assistance apparatus according to claim 8, wherein: the second elastic piece is a tension spring (8), one end of the tension spring (8) is connected with the locating frame (4), and the other end of the tension spring (8) is connected with the measuring scale (1).

10. A cable bend radius measurement assistance apparatus according to claim 8, wherein: the upper side and/or the lower side of the measuring ruler (1) are/is provided with a positioning block (13), and in a free state, the rear end of the measuring arm (2) is abutted against the positioning block (13) under the action of the second elastic piece.