Cable insulation material electrical tree initiation observation device

Abstract

The utility model discloses a cable insulation material electrical tree initiation observation device, and belongs to the field of experimental devices. The triggering assembly and the reciprocating sliding assembly are connected with the frame body; one end of the support is connected with the reciprocating sliding assembly; one side of the holder is connected with the other end of the bracket; the camera assembly is connected with the other side of the holder; wherein the triggering assembly and the camera assembly are correspondingly arranged. The technical effect of the utility model is that when the rapid growth period of a plurality of cable insulation material samples is observed, errors are not easy to generate.

Description

Technical Field

[0001] The utility model relates to an experimental device, in particular to an observation device for initiating electric tree branches of cable insulation materials. Background Art

[0002] Electrical trees are tiny cracks formed by internal discharges in cable insulation, forming tiny channels. They are so-called electrical trees because of their tree-like appearance. These trees can disrupt the stable operation of cables. In severe cases, they can cause electrical breakdown in the insulation, leading to insulation failure and even accidents. Therefore, it is necessary to study the characteristics of electrical trees in cable insulation materials.

[0003] The development of electrical trees is divided into the initial initiation stage and the growth stage. The growth stage can be further divided into the rapid growth period and the slow growth period. Due to the poor observation continuity of the relevant initiation observation device, errors are prone to occur when observing the rapid growth period of multiple cable insulation material samples. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a device for observing the initiation of electrical treeing in cable insulation materials, which is not prone to errors when observing the rapid growth period of multiple cable insulation material samples.

[0005] Technical solution: A device for observing the initiation of electrical treeing in cable insulation materials, comprising:

[0006] frame;

[0007] an initiating assembly and a reciprocating sliding assembly, both connected to the frame;

[0008] a bracket, one end of which is connected to the reciprocating sliding assembly;

[0009] A pan-tilt platform, one side of which is connected to the other end of the bracket;

[0010] a camera assembly connected to the other side of the gimbal;

[0011] Wherein, the triggering component and the camera component are arranged correspondingly.

[0012] Optionally, the reciprocating sliding assembly includes:

[0013] a slide rail connected to the frame;

[0014] A slider connected to the slide rail via a screw nut unit for reciprocating sliding, the slider being connected to one end of the bracket;

[0015] A driver, a driving shaft of the driver and the screw nut unit are connected.

[0016] Optionally, the screw nut unit includes:

[0017] a screw body connected to the drive shaft of the driver;

[0018] A nut body is threadedly connected to the outside of the lead screw body, the nut body and the slide rail are reciprocatingly slidably connected, and the nut body is connected to the slider.

[0019] Optionally, two mounting rings are further included, both connected to the other side of the gimbal, the camera assembly passes through the two mounting rings, and the camera assembly and the two mounting rings are connected by fasteners.

[0020] Optionally, the camera assembly includes a camera body and a lens connected to each other, the lens passes through the two mounting rings, and the lens and the two mounting rings are connected by fasteners.

[0021] Optionally, the triggering component includes:

[0022] an initiation unit connected to the frame;

[0023] A mold temperature controller is connected to the initiation unit through an oil extraction pipe and an oil delivery pipe.

[0024] Optionally, the triggering component further includes:

[0025] a first Y-type filter in communication with the oil extraction pipe;

[0026] a second Y-type filter in communication with the oil delivery pipe;

[0027] A valve connected to the oil pumping pipe.

[0028] Optionally, the initiation component further includes a thermometer connected to the initiation unit.

[0029] Optionally, a light source connected to the frame is further included, and the light source is located on a side of the triggering component away from the camera component.

[0030] Optionally, also include:

[0031] A heat dissipation hole plate connected to the frame;

[0032] a first thermal insulation pad located between the heat dissipation hole plate and the light source;

[0033] A supporting plate connected to a side of the heat dissipation plate away from the frame;

[0034] A second thermal insulation pad is located between the frame and the triggering assembly.

[0035] Beneficial effect: In this embodiment, the cable insulation material samples are all made of cross-linked polyethylene and have a size of 10mm×10mm×4mm. First, the discharge needle of the triggering component is inserted into the above-mentioned cable insulation material sample, and the distance d=2mm between the discharge needle and the bottom of the above-mentioned cable insulation material sample. Then, voltage is applied to the above-mentioned cable insulation material sample, and the voltage value is 6kV, and the application time is 2h, so that the above-mentioned cable insulation material sample generates electrical trees. Then, the reciprocating sliding component is started at time nodes such as 0min, 3min and 6min after the voltage is applied. The reciprocating sliding component drives the bracket, the pan-tilt platform and the camera component to move, so that the camera component shoots the electrical trees of the above-mentioned cable insulation material sample, measures the length of each electrical tree, and calculates the average length of the electrical tree, thereby facilitating the automatic and continuous shooting of the electrical trees of several cable insulation material samples. Even if several cable insulation material samples are in a rapid growth period, it is not easy to produce errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of a device for observing the initiation of electrical treeing in cable insulation materials according to Example 1 of the present utility model;

[0037] Figure 2 This is a partial structural diagram of a device for observing the initiation of electrical treeing in cable insulation materials according to Example 1 of the present utility model;

[0038] Figure 3 This is a graph showing the average length variation of electrical trees with a spacing of d=2 mm according to Example 1 of the present invention;

[0039] Figure 4 The electrical tree morphology diagrams at three time nodes with a spacing of d=2 mm according to Example 1 of the present invention;

[0040] In the figure: 1. frame; 2. reciprocating sliding assembly; 21. slide rail; 22. slider; 23. drive; 3. bracket; 4. pan / tilt; 5. camera assembly; 51. camera body; 52. lens; 61. mounting ring; 62. fastener; 7. trigger assembly; 71. trigger unit; 72. mold temperature controller; 73. oil extraction pipe; 74. oil delivery pipe; 75. first Y-type filter; 76. second Y-type filter; 77. valve; 78. thermometer; 8. light source; 91. first thermal insulation pad; 92. second thermal insulation pad; 93. heat dissipation hole plate; 94. support plate; 95. anti-vibration pad. DETAILED DESCRIPTION

[0041] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] like Figure 1-4 This embodiment provides an observation device for the induction of electrical trees in cable insulation materials, including: a frame 1; a triggering component 7 and a reciprocating sliding component 2, both connected to the frame 1; a bracket 3, one end of the bracket 3 is connected to the reciprocating sliding component 2; a pan-tilt platform 4, one side of the pan-tilt platform 4 is connected to the other end of the bracket 3; a camera component 5 connected to the other side of the pan-tilt platform 4; wherein the triggering component 7 and the camera component 5 are arranged correspondingly.

[0044] Specifically, in this embodiment, the cable insulation material samples are all made of cross-linked polyethylene and have dimensions of 10 mm × 10 mm × 4 mm. First, the discharge needle of the triggering component 7 is inserted into the above-mentioned cable insulation material sample, and the distance d between the discharge needle and the bottom of the above-mentioned cable insulation material sample is 2 mm. Then, voltage is applied to the above-mentioned cable insulation material samples, and the voltage value is 6 kV, and the application time is 2 h, so that the above-mentioned cable insulation material samples produce electrical trees. Then, the reciprocating sliding component 2 is started at time nodes such as 0 min, 3 min and 6 min after the voltage is applied. The reciprocating sliding component 2 drives the bracket 3, the pan-tilt head 4 and the camera component 5 to move, so that the camera component 5 shoots the electrical trees of the above-mentioned cable insulation material samples, measures the length of each electrical tree, and calculates the average length of the electrical tree, thereby facilitating the automatic and continuous shooting of the electrical trees of several cable insulation material samples. Even if several cable insulation material samples are in a rapid growth period, it is not easy to produce errors.

[0045] Among them, the frame 1 is used to carry the triggering component 7, the reciprocating sliding component 2, the bracket 3, the pan-tilt head 4 and the camera component 5, etc.; the triggering component 7 is used to make the cable insulation material sample produce electrical trees; the reciprocating sliding component 2 facilitates the bracket 3, the pan-tilt head 4 and the camera component 5 to slide back and forth; the bracket 3 is used to carry the pan-tilt head 4, and the bracket 3 can specifically be a retractable bracket and locked with screws to facilitate adjustment of the height of the pan-tilt head 4 and the camera component 5; the pan-tilt head 4 is used to carry the camera component 5, and one side of the pan-tilt head 4 and the other end of the bracket 3 can specifically be connected by a universal damping connection through a ball head and a ball shell with greater mutual friction, which is convenient for adjusting the angle of the pan-tilt head 4 and the camera component 5; the camera component 5 is used to shoot the electrical trees of several cable insulation material samples.

[0046] Further, such as Figure 1 The reciprocating sliding assembly 2 includes: a slide rail 21 connected to the frame 1; a slider 22 that is reciprocatingly connected to the slide rail 21 via a screw-nut unit, and the slider 22 is connected to one end of the bracket 3; and a driver 23, whose drive shaft is connected to the screw-nut unit. Specifically, during operation, the drive shaft of the driver 23 drives the screw-nut unit to move, and the screw-nut unit drives the slider 22 to reciprocate along the slide rail 21. The frame 1 is used to support the slide rail 21. The driver 23 can be a servo motor, a stepper motor, or the like.

[0047] Further, such as Figure 1 The screw-nut unit comprises a screw body connected to the drive shaft of the driver 23; a nut body threadedly connected to the screw body, the nut body being connected to the slide rail 21 for reciprocating sliding movement, and the nut body being connected to the slider 22. Specifically, during operation, the drive shaft of the driver 23 drives the screw body to rotate. Under the rotation limit of the slide rail 21, the screw body drives the nut body to slide back and forth, and the nut body drives the slider 22 to slide back and forth.

[0048] Further, such as Figure 2 , further comprising two mounting rings 61 connected to the other side of the pan / tilt platform 4. The camera assembly 5 passes through the two mounting rings 61. The camera assembly 5 and the two mounting rings 61 are connected by fasteners 62. Specifically, the two mounting rings 61 are used to radially limit the camera assembly 5 and cooperate with the fasteners 62 to limit the camera assembly 5 circumferentially and axially. The fasteners 62 may be screws, bolts, etc.

[0049] Further, such as Figure 2 The camera assembly 5 includes a camera body 51 and a lens 52 connected to each other. The lens 52 passes through two mounting rings 61. The lens 52 and the two mounting rings 61 are connected by fasteners 62. Specifically, the two mounting rings 61 are used to radially limit the lens 52 and cooperate with the fasteners 62 to limit the lens 52 in the circumferential and axial directions.

[0050] Further, such as Figure 1 The initiation assembly 7 includes an initiation unit 71 connected to the frame 1; a mold temperature controller 72 connected to the initiation unit 71 via an oil extraction pipe 73 and an oil delivery pipe 74. Specifically, the initiation unit 71 is used to induce electrical dendrites in a plurality of cable insulation material samples. The initiation unit 71 may specifically employ the structure described in Patent Publication No. CN220855075U. The mold temperature controller 72 is used to circulate constant-temperature silicone oil within the initiation unit 71 via the oil extraction pipe 73 and the oil delivery pipe 74. This not only provides insulation protection for the plurality of cable insulation material samples, but also facilitates the generation of electrical dendrites in the plurality of cable insulation material samples in a constant temperature environment. An anti-vibration pad 95 may be provided at the bottom of the mold temperature controller 72 to enhance its anti-vibration performance.

[0051] Further, such as Figure 1 The triggering assembly 7 further includes a first Y-type filter 75 connected to the oil extraction pipe 73; a second Y-type filter 76 connected to the oil delivery pipe 74; and a valve 77 connected to the oil extraction pipe 73. Specifically, the first and second Y-type filters 75 and 76 are both used to filter the thermostatic silicone oil; and the valve 77 is used to control the circulation of the thermostatic silicone oil.

[0052] Further, such as Figure 1The triggering component 7 further includes a thermometer 78 connected to the triggering unit 71. Specifically, the thermometer 78 is used to detect and display the temperature of the triggering unit 71 in real time. The thermometer 78 can be a thermocouple thermometer, a thermal resistance thermometer, etc.

[0053] Further, such as Figure 1 , further comprising: a light source 8 connected to the frame 1, the light source 8 being located on a side of the triggering assembly 7 away from the camera assembly 5. Specifically, the light source 8 facilitates enhancing the camera assembly 5's photographic effect of electrical branches on a plurality of cable insulation material samples, and the light source 8 is preferably an LED strip light source.

[0054] Further, such as Figure 1 , further comprising: a heat dissipation hole plate 93 connected to the frame 1; a first thermal insulation pad 91 located between the heat dissipation hole plate 93 and the light source 8; a support plate 94 connected to the side of the heat dissipation hole plate 93 away from the frame 1; and a second thermal insulation pad 92 located between the frame 1 and the triggering component 7. Specifically, since the triggering component 7 is the main heat source, the second thermal insulation pad 92 and the first thermal insulation pad 91 are used to prevent the heat generated by the triggering component 7 from being transmitted to the light source 8 through the frame 1. The material of the second thermal insulation pad 92 and the first thermal insulation pad 91 can be polyurethane elastomer, thermoplastic polyurethane elastomer, etc. The heat generated by the triggering component 7 is dissipated in turn through the frame 1 and the heat dissipation hole plate 93; the support plate 94 is used to prevent the light source 8 from falling from the frame 1.

[0055] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A device for observing the induction of electrical treeing in cable insulation materials, characterized in that: include: frame; an initiating assembly and a reciprocating sliding assembly, both connected to the frame; a bracket, one end of which is connected to the reciprocating sliding assembly; A pan-tilt platform, one side of which is connected to the other end of the bracket; a camera assembly connected to the other side of the gimbal; Wherein, the triggering component and the camera component are arranged correspondingly; The triggering component includes: an initiation unit connected to the frame; a mold temperature controller connected to the initiation unit via an oil extraction pipe and an oil delivery pipe; The triggering component also includes: a first Y-type filter in communication with the oil extraction pipe; a second Y-type filter in communication with the oil delivery pipe; a valve connected to the oil pumping pipe; The initiation assembly further includes a thermometer connected to the initiation unit.

2. The device for observing the initiation of electrical treeing in cable insulation materials according to claim 1, characterized in that: The reciprocating sliding assembly comprises: a slide rail connected to the frame; A slider connected to the slide rail via a screw nut unit for reciprocating sliding, the slider being connected to one end of the bracket; A driver, a driving shaft of the driver and the screw nut unit are connected.

3. The device for observing the initiation of electrical treeing in cable insulation materials according to claim 2, characterized in that: The screw nut unit comprises: a screw body connected to the drive shaft of the driver; A nut body is threadedly connected to the outside of the lead screw body, the nut body and the slide rail are reciprocatingly slidably connected, and the nut body is connected to the slider.

4. A device for observing the initiation of electrical treeing in cable insulation materials according to any one of claims 1 to 3, characterized in that: It also includes two mounting rings connected to the other side of the pan-tilt head, the camera assembly passes through the two mounting rings, and the camera assembly and the two mounting rings are connected by fasteners.

5. The device for observing the initiation of electrical treeing in cable insulation materials according to claim 4, characterized in that: The camera assembly includes a camera body and a lens connected to each other. The lens passes through the two mounting rings. The lens and the two mounting rings are connected by fasteners.

6. A device for observing the initiation of electrical treeing in cable insulation materials according to any one of claims 1 to 3, characterized in that: It also includes a light source connected to the frame, and the light source is located on a side of the triggering component away from the camera component.

7. The device for observing the initiation of electrical treeing in cable insulation materials according to claim 6, characterized in that: Also includes: A heat dissipation hole plate connected to the frame; a first thermal insulation pad located between the heat dissipation hole plate and the light source; A supporting plate connected to a side of the heat dissipation hole plate away from the frame; A second thermal insulation pad is located between the frame and the triggering assembly.

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