Large-section cable conductor tension sample device and operation method thereof

Abstract

The invention relates to the technical field of cable conductor tension samples, in particular to a large-section cable conductor tension sample end processing method which comprises the steps of cable conductor end unfolding, cleaning, recovering, surfacing, polishing and the like. According to the large-cross-section cable conductor tension sample, the end of the cable conductor is made into a pagoda shape, all layers of monofilaments are welded in an opposite mode to form a whole, it is guaranteed that all the layers of monofilaments are evenly stressed at the same time, relative slipping among all the layers of monofilaments does not occur, and then real tensile strength data of the whole conductor are obtained; the end of the cable conductor is made into a pagoda shape, and the tension sample which is formed by butt-welding all layers of monofilaments into a whole has no special requirements on tension equipment and tools, is convenient to operate, is suitable for processing various large-section copper and aluminum conductor tension samples, and is high in universality and good in effect.

Description

Technical Field

[0001] The invention relates to the technical field of cable conductor tensile test specimens, in particular to a large-section cable conductor tensile test specimen device and an operating method thereof. Background Art

[0002] The cable conductor tensile test is an experimental method to test the mechanical strength and ductility of the cable conductor. It applies gradually increasing tensile force to the cable conductor until it breaks, so as to evaluate the tensile strength, elongation and fracture characteristics of the conductor in actual use. The end treatment of the cable conductor tensile test specimen is a key step to ensure the smooth progress of the tensile test and to avoid the specimen from breaking or slipping due to uneven force on the end during the test. Therefore, the requirements for the end treatment are relatively high.

[0003] However, in actual practice, since the cable end is cylindrical, it is easy to slip during the tensile test, resulting in very limited stability of the tensile test. Summary of the invention

[0004] The technical problem to be solved by the present invention is that since the cable end is cylindrical, it is easy to slide when performing a tensile test on it, resulting in very limited stability of the tensile test.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a large-section cable conductor tensile test specimen device, including a cable conductor, a main tensile tube located on both sides of the cable conductor and a main control frame, the outer side of the main tensile tube is slidably sleeved with a combined external extension tube, the combined external extension frame includes a first set of tubes, a second set of tubes, a third set of tubes and a fourth set of tubes slidably sleeved on the outer side of the main tensile tube, the outer sides of the main tensile tube, the first set of tubes, the second set of tubes, the third set of tubes and the fourth set of tubes are all provided with external limit blocks protruding outward, the outer sides of the first set of tubes, the second set of tubes, the third set of tubes and the fourth set of tubes are all provided with strip limit openings that match the external limit blocks, a magnetically controlled locking module is installed inside the external limit block, an internal stretching through hole that matches the main tensile tube is opened inside the main control frame, and a tension driving module for controlling the main tensile tube is installed on the inner wall of the internal stretching through hole.

[0006] The main tension tube, the first set tube, the second set tube, the third set tube and the fourth set tube are all provided with staggered external limit blocks protruding outwards on the outer sides.

[0007] The outer sides of the main tension tube, the first sleeve tube, the second sleeve tube and the third sleeve tube are all provided with external limiting openings that match the magnetically controlled locking module.

[0008] An assembly chamber with an inner opening is provided inside the external limiting block.

[0009] The magnetically controlled locking module comprises a telescopic clamping block slidably mounted inside the assembly chamber, an annular electromagnet fixed on the inner wall of the assembly chamber, and a control spring.

[0010] A detachable extrusion block is installed on the outer extrusion surface of the telescopic clamping block.

[0011] The outer side surface of the main tension tube is provided with a lateral driving tooth groove matched with the tension driving module.

[0012] The tension drive module includes an external drive gear meshed with the lateral drive tooth groove, a synchronous worm wheel axially fixed on the external drive gear, a transverse worm meshed with the synchronous worm wheel, a transmission gear axially fixed at one end of the transverse worm wheel, a drive gear ring meshed with the transmission gear, and a drive motor controlling the drive gear ring.

[0013] The outer assembly openings of the main tension tube, the first set tube, the second set tube, the third set tube and the fourth set tube are provided with tapered material guide openings which gradually expand from the inside to the outside.

[0014] The ends on both sides of the cable conductor are made into a pagoda shape, and then the thinnest sections of the ends on both sides of the cable conductor are respectively inserted into the main tension tubes on both sides, and then the outer side of the westernmost section is clamped and fixed by the magnetically controlled locking module on the main tension tube, and then the first set of tubes, the second set of tubes, the third set of tubes and the fourth set of tubes are pulled outward in turn, and the first set of tubes, the second set of tubes, the third set of tubes and the fourth set of tubes are respectively pulled to the outside of the corresponding ends, and then the corresponding magnetically controlled locking module is started again, and the first set of tubes, the second set of tubes, the third set of tubes, and the fourth set of tubes are clamped and fixed to the outer wall of the end of the cable conductor by the magnetically controlled locking module, thereby increasing the fixing area, and then the tension driving module inside the main control frame is started to pull the main tension tube inside the internal tensile through hole outward to perform a cable conductor tension test.

[0015] The beneficial effects of the present invention are: (1) A large-section cable conductor tensile test device of the present invention increases friction resistance by making the cable joint into a pagoda shape, ensuring uniform force, thereby obtaining true tensile strength data; (2) The use of a segmented, retractable structural design to adapt to the pagoda-shaped cable connector can improve the installation firmness and stability; (3) The whole equipment has a compact structure, is easy to operate and has a wide range of applicability; (4) When not in use, the first set of tubes, the second set of tubes, the third set of tubes and the fourth set of tubes can be slidably mounted on the outside of the main tension tube, greatly reducing the space occupied by the outside, making it easier to store and improving the safety and durability of the structure; (5) By setting the magnetically controlled locking module inside the external limit block, the structural layout is more reasonable; (6) By inserting the magnetically controlled locking module into the external limit port, the first set of tubes, the second set of tubes and the third set of tubes can be independently controlled according to the needs of the cable, which has a wider range of applications and more flexible operation; (7) A detachable extrusion block is arranged on the outer extrusion surface of the telescopic clamping block, which can be replaced and adapted as needed, thereby reducing the subsequent use cost and improving the clamping stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the assembly of the main tension tube and the combined external extension tube in the present invention.

[0019] Figure 3 It is a partial schematic diagram of the interior of the assembly end of the main tension tube and the combined external extension tube in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the tension driving module in the present invention.

[0021] Figure 5 It is a schematic diagram of one end of the cable conductor in the present invention. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A large-section cable conductor tensile test specimen device shown in the figure comprises a cable conductor, a main tensile tube 1 located on both sides of the cable conductor and a main control frame 2, a combined external extension tube is slidably sleeved on the outer side of the main tensile tube 1, the combined external extension frame comprises a first set of tubes 3, a second set of tubes 4, a third set of tubes 5 and a fourth set of tubes 6 slidably sleeved on the outer side of the main tensile tube 1, the outer sides of the main tensile tube 1, the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 are all provided with outwardly protruding external limit blocks 7, the outer sides of the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 are all provided with strip limit openings 8 matched with the external limit blocks 7, a magnetically controlled locking module 9 is installed inside the external limit blocks 7, an internal stretching through hole 10 matched with the main tensile tube 1 is opened inside the main control frame 2, and a tension driving module for controlling the main tensile tube 1 is installed on the inner wall of the internal stretching through hole.

[0025] The external limit block 7 slides and translates along the strip limit opening 8, and can adjust the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 to stretch outward, and then are respectively put on the outside of the sheaths cut into pagoda shapes on both sides of the cable conductor, and then the main tension tube 1 is put on the thinnest sheath, and then the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 on the outside are respectively put on the outside of the corresponding sheaths in turn, and the magnetically controlled locking module 9 is started by an external power supply to clamp and lock the outer walls of the sheaths of different layers, and then the main tension tubes 1 at both ends are inserted into the internal stretching through-hole 10, and the tension driving module is used to control the outward pulling, so as to test the tension of the cable conductor.

[0026] In order to match the structural layout, the main tension tube 1 , the first set tube 3 , the second set tube 4 , the third set tube 5 and the fourth set tube 6 are all provided with outwardly protruding external limit blocks 7 which are staggeredly arranged on the outside.

[0027] In order to cooperate with the outer limit, the outer sides of the main tension tube 1 , the first set tube 3 , the second set tube 4 and the third set tube 5 are all provided with outer limit openings 12 that cooperate with the magnetically controlled locking module 9 .

[0028] When it is not necessary to extend outward, it is only necessary to start the magnetically controlled locking module 9 and insert it into the external limiting opening 12 on the inner pipe, so that its position can be limited.

[0029] In order to facilitate internal assembly, an assembly chamber with an inner opening is provided inside the external limiting block 7 .

[0030] The inner opening of the assembly chamber is a shrinkage structure.

[0031] In order to cooperate with the magnetically controlled telescopic movement, the magnetically controlled locking module 9 includes a telescopic clamping block 91 slidably mounted inside the assembly chamber, an annular electromagnet 92 fixed on the inner wall of the assembly chamber, and a control spring 93 .

[0032] The annular electromagnet 92 is activated by powering on, thereby contracting the control spring 93, thereby pulling the telescopic clamping block 91 out of the assembly chamber, squeezing the outer wall of the cable conductor outward or inserting it into the external limiting opening 12 to perform a limiting operation.

[0033] In order to facilitate loading and unloading, reduce the cost of later use, and facilitate adaptation, a detachable extrusion block 94 is installed on the outer extrusion surface of the telescopic clamping block 91.

[0034] An installation slot is provided on the outer extrusion surface of the telescopic clamping block 91 , and the detachable extrusion block 94 is inserted into the installation slot from the opening and fixedly assembled with the telescopic clamping block 91 .

[0035] In order to cooperate with the drive, the outer side of the main tension tube 1 is provided with a lateral driving tooth groove that cooperates with the tension driving module.

[0036] In order to synchronize the drive adjustment and ensure consistent pulling force, the tension drive module includes an external drive gear 111 meshing with the lateral drive tooth groove, a synchronous worm wheel 112 axially fixed on the external drive gear 111, a transverse worm 113 meshing with the synchronous worm wheel 112, a transmission gear 114 axially fixed at one end of the transverse worm 113, a drive gear ring 115 meshing with the transmission gear 114, and a drive motor 116 controlling the drive gear ring 115.

[0037] The driving motor 116 meshes with the driving gear ring 115 through the driving gear on the driving shaft, driving the driving gear ring 115 to rotate, and then the driving gear ring 115 drives all the transmission gears 114 to rotate through the rotation, and the transmission gear 114 drives the transverse worm 113 to rotate. The transverse worm 113 starts the synchronous worm gear 112 to rotate while controlling the external driving gear 111 to rotate, thereby controlling the main tension tube 1 to translate inside the internal stretching through hole 10.

[0038] In order to facilitate insertion, the outer assembly openings of the main tension tube 1, the first set tube 3, the second set tube 4, the third set tube 5 and the fourth set tube 6 are provided with tapered material guide openings which gradually expand from the inside to the outside.

[0039] The ends on both sides of the cable conductor are made into a pagoda shape, and then the thinnest sections of the ends on both sides of the cable conductor are respectively inserted into the main tension tube 1 sets on both sides, and then the outer side of the westernmost section is clamped and fixed by the magnetically controlled locking module 9 on the main tension tube 1 set, and then the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 are pulled outward in turn, and the first set of tubes 3, the second set of tubes 4, the third set of tubes 5 and the fourth set of tubes 6 are respectively pulled to the outside of the corresponding ends, and then the corresponding magnetically controlled locking module 9 is started again, and the first set of tubes 3, the second set of tubes 4, the third set of tubes 5, and the fourth set of tubes 6 are respectively clamped and fixed to the outer wall of the end of the cable conductor by the magnetically controlled locking module 9, thereby increasing the fixing area, and then the tension driving module inside the main control frame 2 is started to pull the main tension tube 1 inside the internal tensile through hole outward to perform a cable conductor tension test.

[0040] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A large-section cable conductor tensile test specimen device, comprising a cable conductor, a main tensile tube (1) located on both sides of the cable conductor, and a main control frame (2), wherein: The outer side of the main tension tube (1) is slidably sleeved with a combined external extension tube, and the combined external extension frame comprises a first sleeve (3), a second sleeve (4), a third sleeve (5) and a fourth sleeve (6) which are slidably sleeved on the outer side of the main tension tube (1). The outer sides of the main tension tube (1), the first sleeve (3), the second sleeve (4), the third sleeve (5) and the fourth sleeve (6) are all provided with an external limit block (7) protruding outwards. The outer sides of the first sleeve (3), the second sleeve (4), the third sleeve (5) and the fourth sleeve (6) are all provided with a strip limit opening (8) which matches the external limit block (7). A magnetically controlled locking module (9) is installed inside the external limit block (7). The inner side of the main control frame (2) is provided with an internal stretching through hole (10) which matches the main tension tube (1), and a tension driving module for controlling the main tension tube (1) is installed on the inner wall of the internal stretching through hole (10).

2. A large cross-section cable conductor tensile test device according to claim 1, characterized in that: The main tension tube (1), the first sleeve tube (3), the second sleeve tube (4), the third sleeve tube (5) and the fourth sleeve tube (6) are all provided with outwardly protruding external limit blocks (7) arranged in a staggered manner on their outer sides.

3. A large cross-section cable conductor tensile test specimen device according to claim 1, characterized in that: The outer sides of the main tension tube (1), the first sleeve tube (3), the second sleeve tube (4) and the third sleeve tube (5) are all provided with external limit openings (12) that match the magnetically controlled locking module (9).

4. A large cross-section cable conductor tensile test device according to claim 1, characterized in that: An assembly chamber with an inner opening is provided inside the external limiting block (7).

5. A large cross-section cable conductor tensile test specimen device according to claim 4, characterized in that: The magnetically controlled locking module (9) comprises a telescopic clamping block (91) slidably mounted inside the assembly chamber, an annular electromagnet (92) fixed on the inner wall of the assembly chamber, and a control spring (93).

6. A large cross-section cable conductor tensile test specimen device according to claim 5, characterized in that: A detachable extrusion block (94) is mounted on the outer extrusion surface of the telescopic clamping block (91).

7. A large cross-section cable conductor tensile test specimen device according to claim 1, characterized in that: The outer side surface of the main tension tube (3) is provided with lateral driving tooth grooves matching with the tension driving module.

8. A large cross-section cable conductor tensile test specimen device according to claim 7, characterized in that: The tension drive module comprises an external drive gear (111) meshed with the lateral drive tooth groove, a synchronous worm wheel (112) axially fixed on the external drive gear (111), a transverse worm (113) meshed with the synchronous worm wheel (112) for transmission, a transmission gear (114) axially fixed to one end of the transverse worm (113), a drive gear ring (115) meshed with the transmission gear (114), and a drive motor (116) for controlling the drive gear ring (115).

9. A large cross-section cable conductor tensile test specimen device according to claim 1, characterized in that: The outer assembly openings of the main tension tube (1), the first sleeve tube (3), the second sleeve tube (4), the third sleeve tube (5) and the fourth sleeve tube (6) are provided with tapered material guide openings which gradually expand from the inside to the outside.

10. A method for operating a tensile test specimen of a large-section cable conductor, characterized in that: The ends of the cable conductor on both sides are made into a pagoda shape, and then the thinnest sections of the ends of the cable conductor on both sides are respectively inserted into the main tension tubes (1) on both sides, and then the outer side of the westernmost section is clamped and fixed by using the magnetically controlled locking module (9) on the main tension tube (1), and then the first set of tubes (3), the second set of tubes (4), the third set of tubes (5) and the fourth set of tubes (6) are sequentially pulled outwards, and the first set of tubes (3), the second set of tubes (4), the third set of tubes (5) and the fourth set of tubes (6) are respectively pulled outwards to the outside of the corresponding ends, and then the corresponding magnetically controlled locking module (9) is started again, and the first set of tubes (3), the second set of tubes (4), the third set of tubes (5) and the fourth set of tubes (6) are respectively clamped and fixed to the outer wall of the end of the cable conductor by the magnetically controlled locking module (9), so as to increase the fixing area, and then the tension driving module inside the main control frame (2) is started to pull the main tension tube (1) inside the internal tensile through hole (10) outwards to perform a cable conductor tension test.

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