Degradation detection device for typical defects of control cable

Abstract

The invention relates to the technical field of cable deterioration detection, in particular to a deterioration detection device for typical defects of a control cable, which comprises a horizontal main frame, lateral brackets are mounted on two sides of the upper end of the horizontal main frame, and lateral driving wheels for controlling translation of the cable are mounted in the lateral brackets. And a middle detection cover is assembled between the lateral brackets on the two sides on the upper surface of the horizontal main frame. According to the deterioration detection device for the typical defects of the control cable, full-automatic detection is adopted, manual operation is not needed, and the detection efficiency is greatly improved; by adopting an internal detection mode, the influence of the external environment is avoided, and the detection precision is greatly improved; the electric control type assembly shaft barrel is movably inserted into the inner assembly cover in the middle detection cover, and a built-in degradation detection device in the electric control type assembly shaft barrel can be driven to rotate and adjust, so that a moving cable is detected in an omnibearing manner, and the detection range is very wide.

Description

Technical Field

[0001] The invention relates to the technical field of cable degradation detection, in particular to a degradation detection device for controlling typical defects of a cable. Background Art

[0002] In the production process of rubber-sheathed cables, appearance defects often occur, such as an uneven surface; clinker particles or impurities on the surface; scratches and abrasions on the surface of wires and cables; surface collapse; twisted patterns on the surface, etc. If such cables are used, it may not only cause circuit failures but also serious accidents such as leakage and fire. There are many factors that cause this situation, including 1. The die sleeve bearing wire is too long or too short, the die mouth is not smooth and the aperture is too large; the temperature of the machine head, die mouth or body is low; the plasticity of the rubber material is low, etc., which may cause the surface of the rubber-sheathed cable to be uneven; 2. The supplied material is not clean and contains impurities; the rubber scorching time is too short; the temperature of the rubber extrusion body, machine head or die is too high; the rubber in the machine head does not flow smoothly, and there are dead corners where rubber is retained; the screw is not smooth, viscose, etc., which may cause clinker particles (early vulcanized rubber particles) or impurities on the surface of the rubber-sheathed cable; 3. The die sleeve is not smooth, there is no chamfer; there are impurities Or the cooked rubber particles block the die opening; the tube is dragged inside the vulcanizing tube and is scratched; the aperture of the rubber gasket sealing the vulcanizing tube outlet is too small, etc., which may cause scratches and abrasions on the surface of the rubber sheathed cable; 4. The aperture of the die sleeve is too large; the gaps between the outer strands of the conductive core and the single wires are too large, and the outer diameter of the cable core is uneven; the rubber material has low plasticity and poor viscosity; there are impurities in the rubber material; the distance to the die is small, and the pressure is small, which may cause the surface of the rubber sheathed cable to collapse; 5. The aperture of the die sleeve is too small; the rubber material is insufficient and the gaps in the core are not filled; the conductive core or cable core is jumpered; the distance to the die is short, etc., which may cause the rubber sheathed cable surface to appear twisted.

[0003] In summary, there are two main reasons for the appearance defects of cables during the production process. One is that the raw materials are not up to standard, and the other is that the production equipment and process are not up to standard. These reasons will directly shorten the service life of the cable. In addition, during construction or in an environment where the power is on for a long time and the temperature is high, the insulator is very likely to break, causing the live conductor to be exposed and causing the risk of electric shock short circuit. In addition, when the sheath and insulation thickness of the cable do not meet the standards, the electrical strength of the cable will be seriously reduced, resulting in a shortened service life of the cable. In severe cases, the cable may be punctured, and the insulation layer will not play a normal protective role, resulting in electrical short circuits and fire accidents.

[0004] In order to avoid such situations, it is necessary to carry out degradation detection tests during the production process. However, the current degradation detection tests require manual operation, which is not only cumbersome, but also has a narrow detection range and incomplete detection data. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the current degradation detection test requires manual operation, which not only has a cumbersome operation process, but also has an insufficient detection range and incomplete detection data.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a degradation detection device for controlling typical defects of a control cable, comprising a horizontal main frame, lateral brackets are installed on both sides of the upper end of the horizontal main frame, lateral driving wheels for controlling the translation of the cable are installed inside the lateral brackets, a central detection cover is installed between the lateral brackets on both sides of the upper surface of the horizontal main frame, a plurality of internal assembly covers are installed inside the central detection cover through internal brackets, an electrically controlled assembly shaft cylinder is movably inserted inside the internal assembly cover, a built-in degradation detection device is installed inside the electrically controlled assembly shaft cylinder, and lateral air guide covers are fixedly installed at the opening positions on both sides of the electrically controlled assembly shaft cylinder inside the central detection cover.

[0007] The electrically controlled assembly shaft cylinder comprises a transverse assembly cylinder movably inserted in the internal assembly cover, an outer adjustment motor fixed on the lower surface of the internal assembly cover and a built-in transmission gear set for driving the transverse assembly cylinder and the outer adjustment motor.

[0008] A lateral assembly notch for placing cables is provided on the outer arc surface of the transverse assembly cylinder.

[0009] The outer side adjustment motors on the internal assembly covers at different positions in the central detection cover are arranged in a staggered layout.

[0010] A strip-shaped mounting groove for mounting a built-in degradation detection device is provided on the inner side surface of the transverse assembly cylinder.

[0011] The built-in degradation detection device comprises a strip-shaped assembly plate fixed in a strip-shaped installation slot, an optical recognition module fixed on the strip-shaped assembly plate, a temperature detection module, and a humidity detection module.

[0012] An external fan matched with the lateral air guide cover is fixedly mounted on the outer side surface of the central detection cover, and an electric heating module connected with the lateral air guide cover is fixedly mounted on the inner side surface of the central detection cover.

[0013] The lateral opening of the lateral air guide cover is fixedly equipped with an arc-shaped air guide cover.

[0014] Electrically controlled closed cover shells are movably mounted on both sides of the arc-shaped air deflector.

[0015] The lateral driving wheel comprises an upper electrically controlled lifting wheel group and a lower electrically controlled lifting wheel group which are installed inside the lateral bracket.

[0016] The beneficial effects of the present invention are:

[0017] (1) The deterioration detection device for typical defects of a control cable of the present invention adopts fully automated detection, does not require manual operation, and greatly improves the detection efficiency;

[0018] (2) By adopting the internal detection method, it is not easily affected by the external environment, which greatly improves the detection accuracy;

[0019] (3) By movably inserting an electrically controlled assembly shaft cylinder inside the internal assembly cover inside the central detection cover, the built-in degradation detection device inside the electrically controlled assembly shaft cylinder can be driven to rotate and adjust, thereby performing all-round detection of the moving cable, and the detection range is very wide;

[0020] (4) The outer adjustment motor is arranged in a staggered layout to ensure the rotation stability of the electrically controlled assembly shaft;

[0021] (5) The central detection cover is fixedly equipped with side guide covers at the openings on both sides of the electric control assembly shaft cylinder, which can guide and drive the air inside the electric control assembly shaft cylinder, thereby improving the degradation efficiency;

[0022] (6) By adopting a circulating flow method, energy loss can be reduced;

[0023] (7) By pulling on both sides, the stability and straightness of the cable during the test can be improved;

[0024] (8) By adopting the lateral drive wheel design, it can adapt to cables of various specifications, thereby improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a side view schematic diagram of the electrically controlled assembly shaft cylinder of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the built-in degradation detection device in the present invention.

[0029] In the figure, 1. horizontal main frame, 2. lateral bracket, 3. lateral driving wheel, 4. central detection cover, 5. internal assembly cover, 6. electrically controlled assembly shaft cylinder, 7. built-in degradation detection device, 8. lateral air guide cover, 61. horizontal assembly cylinder, 62. outer adjustment motor, 63. built-in transmission gear set, 64. lateral assembly notch, 71. strip assembly plate, 72. optical recognition module, 73. temperature detection module, 74. humidity detection module, 9. external fan, 10. electric heating module, 11. arc-shaped air guide cover, 12. electrically controlled closed cover, 31. upper electrically controlled lifting wheel group, 32. lower electrically controlled lifting wheel group. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Figure 1 , Figure 2 and Figure 3 The degradation detection device for typical defects of the control cable shown in the figure comprises a horizontal main frame 1, lateral brackets 2 are installed on both sides of the upper end of the horizontal main frame 1, lateral driving wheels 3 for controlling the translation of the cable are installed inside the lateral brackets 2, a central detection cover 4 is installed between the lateral brackets 2 on both sides of the upper surface of the horizontal main frame 1, two internal assembly covers 5 are installed inside the central detection cover 4 through internal brackets, an electric-controlled assembly shaft cylinder 6 is movably inserted inside the internal assembly cover 5, a built-in degradation detection device 7 is installed inside the electric-controlled assembly shaft cylinder 6, and lateral air guide covers 8 are fixedly installed at the opening positions on both sides of the electric-controlled assembly shaft cylinder 6 inside the central detection cover 4.

[0033] In order to cooperate with the transmission adjustment, the electrically controlled assembly shaft cylinder 6 includes a transverse assembly cylinder 61 movably inserted into the internal assembly cover 5, an outer adjustment motor 62 fixed on the lower surface of the internal assembly cover 5, and a built-in transmission gear set 63 for transmitting the transverse assembly cylinder 61 and the outer adjustment motor 62.

[0034] In order to facilitate the installation and removal of the cable, a lateral installation notch 64 for placing the cable is opened on the outer arc surface of the horizontal installation tube 61.

[0035] In order to always keep the transmission relationship between the outer adjustment motor 62 and the horizontal assembly tube 61 stable, the outer adjustment motors 62 on the inner assembly cover 5 at different positions in the central detection cover 4 are arranged in a staggered layout.

[0036] In order to facilitate internal installation and fixation, a strip-shaped installation slot for installing the built-in degradation detection device 7 is provided on the inner side surface of the transverse assembly tube 61 .

[0037] In order to cooperate with internal assembly and detection, the built-in degradation detection device 7 includes a strip assembly plate 71 fixed in the strip installation slot, an optical recognition module 72 fixed on the strip assembly plate 71, a temperature detection module 73, and a humidity detection module 74.

[0038] The optical recognition module 72 is used to optically recognize the degradation and deformation state, the temperature detection module 73 is used to detect the temperature change, and the humidity detection module 74 is used to detect the humidity change.

[0039] The cables were subjected to electrical, thermal and mechanical stresses in advance. The insulation of the cables in the bent or extruded state was subjected to stresses, and the stresses increased with the increase of the bending or extrusion degree. Under the combined action of mechanical, electrical and thermal stresses, the more severe the bending degree and the greater the extrusion depth, the larger the crystal size, the larger the lattice spacing and the crystallinity, and the smaller the full width at half maximum. The lattice spacing change value of the sample with an extrusion depth of 11 mm increased by 57.7% compared with the sample with an extrusion depth of 5 mm, the crystallinity increased by 7.78%, and the full width at half maximum decreased by 15.7%. At the same time, the cross-linking byproducts of acetophenone The migration and diffusion of the cables occurred, and its mechanism was explained. The mechanical and electrical properties also changed, showing a certain correlation with the distribution of the acetophenone by-product content. Compared with the most severe / weakest bending part, the acetophenone contents of the outer and inner bending parts with the second most severe / more severe degree increased by about 57% and 77% respectively, and the tensile strength decreased by about 14.77% and 12.72% at most. The acetophenone content in the middle layer at an extrusion depth of 11 mm was about 32.75% more than that in the outer layer, and the elongation at break was also greater than that in the outer and inner layers. The average elongation at break was 7.87% lower than that of the untreated cable. Secondly, under the long-term effects of water and heat degradation, water does intrude into the cable insulation material after 660 days of degradation, which can be characterized by FTIR infrared spectroscopy testing. At the same time, the crystal structure changes, a small amount of thermal cracking of the macromolecular chain occurs, the tensile strength and elongation at break decrease, the dielectric constant and loss factor increase, and the volume resistivity gradually increases. These changes are more significant at high temperatures and in pure water baths. The water inflow of the sample in a 50°C pure water bath is the largest, increasing by 84.6%. The dielectric loss tangent value increases by 5.90% compared to the untreated sample, and the resistivity decreases by as much as 99.19%.

[0040] In addition, using the correspondence between insulation status, characterization parameters and detection methods established in the cable degradation experiment, the fault cause analysis and material property detection of three types of actual operating faulty cables were carried out. The experimental results show that XRD, FTIR spectroscopy, DSC, tensile test, dielectric property test and resistivity test can effectively characterize the changes in material properties after cable degradation failure, and can be used for auxiliary analysis of cable fault detection.

[0041] In order to cooperate with the external driven air guide, an external fan 9 that cooperates with the lateral air guide cover 8 is fixedly installed on the outer side of the central detection cover 4, and an electric heating module 10 that is connected to the lateral air guide cover 8 is fixedly installed on the inner side of the central detection cover 4.

[0042] The external fan 9 controls the air inside the lateral air guide cover 8 to be introduced from one side of the horizontal assembly tube 61 to the other side of the horizontal assembly tube 61 by rotating, and finally forms a circulating flow channel.

[0043] In order to cooperate with the lateral air guide, the lateral opening of the lateral air guide cover 8 is fixedly equipped with an arc-shaped air guide cover 11.

[0044] In order to cooperate with the lateral electric-controlled closing, electric-controlled closing cover shells 12 are movably mounted on both sides of the arc-shaped air deflector 11 .

[0045] In order to cooperate with height adjustment, the lateral driving wheel 3 includes an upper electrically controlled lifting wheel group 31 and a lower electrically controlled lifting wheel group 32 installed inside the lateral bracket 2.

[0046] The upper electrically controlled lifting wheel group 31 and the lower electrically controlled lifting wheel group 32 are both composed of lifting wheels and struts for controlling the lifting and lowering of the lifting wheels.

[0047] 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 control cable typical defect degradation detection device, comprising a horizontal main frame (1), characterized in that: The upper ends of the horizontal main frame (1) are provided with lateral brackets (2) on both sides, and lateral driving wheels (3) for controlling the translation of the cable are installed inside the lateral brackets (2). The upper surface of the horizontal main frame (1) is provided with a central detection cover (4) between the lateral brackets (2) on both sides, and a plurality of internal assembly covers (5) are installed inside the central detection cover (4) through internal brackets. An electrically controlled assembly shaft cylinder (6) is movably inserted inside the internal assembly cover (5), and a built-in degradation detection device (7) is installed inside the electrically controlled assembly shaft cylinder (6). The central detection cover (4) is provided with lateral air guide covers (8) fixedly installed at the opening positions on both sides of the electrically controlled assembly shaft cylinder (6).

2. The control cable typical defect degradation detection device according to claim 1 is characterized in that: The electrically controlled assembly shaft cylinder (6) comprises a transverse assembly cylinder (61) movably inserted into the interior of the internal assembly cover (5), an outer adjustment motor (62) fixed to the lower surface of the internal assembly cover (5), and a built-in transmission gear set (63) for transmitting the transverse assembly cylinder (61) and the outer adjustment motor (62).

3. The control cable typical defect degradation detection device according to claim 2 is characterized in that: A lateral assembly notch (64) for placing a cable is provided on the outer arc surface of the transverse assembly cylinder (61).

4. The control cable typical defect degradation detection device according to claim 2 is characterized by: The outer side adjustment motors (62) on the inner assembly cover (5) at different positions in the central detection cover (4) are arranged in a staggered layout.

5. The control cable typical defect degradation detection device according to claim 2 is characterized by: A strip-shaped mounting groove for mounting a built-in degradation detection device (7) is provided on the inner side surface of the transverse assembly cylinder (61).

6. The control cable typical defect degradation detection device according to claim 5 is characterized by: The built-in degradation detection device (7) comprises a strip-shaped assembly plate (71) fixed in a strip-shaped installation slot, an optical recognition module (72) fixed on the strip-shaped assembly plate (71), a temperature detection module (73), and a humidity detection module (74).

7. The control cable typical defect degradation detection device according to claim 1 is characterized by: An external fan (9) matched with the lateral air guide cover (8) is fixedly mounted on the outer side surface of the central detection cover (4), and an electric heating module (10) connected with the lateral air guide cover (8) is fixedly mounted on the inner side surface of the central detection cover (4).

8. The control cable typical defect degradation detection device according to claim 1 is characterized by: An arc-shaped air guide cover (11) is fixedly mounted at the lateral opening of the lateral air guide cover (8).

9. The control cable typical defect degradation detection device according to claim 8 is characterized in that: Electrically controlled closed covers (12) are movably mounted on both sides of the arc-shaped air deflector (11).

10. The control cable typical defect degradation detection device according to claim 1 is characterized in that: The lateral driving wheel (3) comprises an upper electrically controlled lifting wheel group (31) and a lower electrically controlled lifting wheel group (32) which are installed inside the lateral bracket (2).

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