Foldable electrostatic dust collection device for high-voltage cable insulation polishing

Abstract

The invention discloses a foldable electrostatic dust collection device for high-voltage cable insulation polishing. The foldable electrostatic dust collection device comprises a folding frame, a positioning ring and an ion wind generation barrel. The folding frame comprises a plurality of insulating plates which are arranged in parallel, each insulating plate is fixedly connected with a plurality of ion wind generating cylinders in a penetrating mode, and the ion wind generating cylinders on the insulating plates are connected through wires; the positioning ring is axially limited and inserted at one end of the ion wind generating cylinder, and a plurality of ion generating probes which are radially inserted and fixed with a cable are fixedly arranged on the inner circumference in the positioning ring. According to the device, crosslinked polyethylene dust generated in the high-voltage cable insulation polishing process can be efficiently and rapidly removed, the air volume of the device is adjusted according to the number of layers of insulation plates arranged on the cable in a sleeving mode, the use modes are diversified, the structure is simple, storage is convenient, and implementation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of power cable equipment, and in particular to a foldable electrostatic dust removal device for high-voltage cable insulation grinding. Background Art

[0002] When installing high-voltage cable accessories, insulation grinding is a key step in the pretreatment of cable accessories installation. The "DLT 342-2010 Rated Voltage 66kV~220kV Cross-linked Polyethylene Insulated Power Cable Connector Installation Specification" clearly stipulates the insulation surface grinding roughness: the insulation surface roughness should be carried out according to the process requirements. If not specified, it should be controlled within: 110kV ≤ 300μm, 220kV ≤ 100μm.

[0003] The insulation grinding process generates a large amount of cross-linked polyethylene dust, which often carries static electricity and is easily adsorbed on the cable surface around the grinding site and on the faces of construction workers. These static dusts are difficult to remove with a conventional vacuum cleaner or wiping with a rag. If not handled thoroughly, the dust will adhere to the interface between the cable and the accessories, which may cause air gaps and electric field distortion, seriously affecting the quality of accessory installation, and there may be a risk of construction workers inhaling dust and affecting their health.

[0004] Therefore, how to efficiently and quickly remove statically charged dust is an important issue that needs to be solved during the installation of high-voltage cable accessories. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a foldable electrostatic dust removal device for high-voltage cable insulation grinding, which can efficiently and quickly remove cross-linked polyethylene dust generated during the high-voltage cable insulation grinding process. The air volume of the device is adjusted according to the number of insulating board layers installed on the cable. It has diverse usage modes and a simple structure, and is easy to store and implement.

[0006] A foldable electrostatic dust removal device for high-voltage cable insulation grinding comprises a folding frame, a positioning ring and an ion wind generating tube; the folding frame comprises a plurality of insulating plates arranged in parallel, each insulating plate is penetrated and fixedly connected with a plurality of ion wind generating tubes, and the ion wind generating tubes on the plurality of insulating plates are connected by wires; the positioning ring is axially limited and plugged into one end of the ion wind generating tube, and a plurality of ion generating probes radially plugged and fixed with cables are fixedly arranged on the inner circumference of the positioning ring.

[0007] Preferably, the ion wind generating tube comprises an insulating tube, a copper tube and an aluminum tube, wherein the copper tube and the aluminum tube are axially spaced and coaxially fixed in the insulating tube; a radially concave annular groove is provided on the circumferential inner wall at one end of the insulating tube.

[0008] Preferably, the electrostatic precipitator further comprises a high-voltage pulse generator, the anode end of the high-voltage pulse generator is electrically connected to the copper tube, and the cathode end of the high-voltage pulse generator is electrically connected to the aluminum tube.

[0009] Preferably, a radially outwardly protruding insert ring is provided on the circumferential outer wall at one end of the positioning ring, and the positioning ring includes two oppositely arranged half rings; the half rings are made of insulating material, and ion generating probes are radially fixed on each of the half rings.

[0010] Preferably, the electrostatic precipitator further comprises a DC power supply, the positive terminal and the negative terminal of the DC power supply are electrically connected to the ion generating probes on the two half rings respectively.

[0011] The advantages and technical effects of the present invention are:

[0012] The present invention discloses a foldable electrostatic dust removal device for high-voltage cable insulation polishing. An aluminum tube and a copper tube are electrically connected to each other through the positive and negative electrodes of a high-voltage pulse generator to generate an ion flow covering the gap of the outer wall of the cable. Two ion generating probes powered by a DC power supply pull the ion flow to generate ion wind on the outer wall of the cable. During this process, a positioning ring is inserted into the cable through the axial limit of the ion generating probe, and the insulating tube and the positioning ring are axially fixed by an insert ring inserted in the ring groove, thereby fixing the electrostatic dust removal device on the outer periphery of the cable to prevent the reaction force generated by the ion wind from driving the electrostatic dust removal device to move and slide on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the present invention;

[0014] Figure 2 This is a schematic diagram of the connection structure of the positioning ring and the ion wind generating cylinder in the present invention;

[0015] Figure 3 This is a schematic diagram of the use posture of the multi-tube single-line air supply of the present invention;

[0016] Figure 4 This is a schematic diagram of the single-tube multi-line air supply posture of the present invention;

[0017] In the figure: 1-insulating plate; 2-insulating tube; 3-conducting wire; 4-ion generating probe; 5-cable; 6-copper tube; 7-aluminum tube; 8-ring groove; 9-insertion ring; 10-positioning ring. DETAILED DESCRIPTION

[0018] The embodiments of the invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and cannot be understood as limiting the invention.

[0019] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] The present invention provides a foldable electrostatic dust removal device for high-voltage cable insulation grinding, comprising a folding frame, a positioning ring and an ion wind generating tube; the folding frame comprises a plurality of insulating plates 1 arranged in parallel, each insulating plate is penetrated and fixedly connected with a plurality of ion wind generating tubes, and the ion wind generating tubes on the plurality of insulating plates are connected by wires 3; the positioning ring is axially limited and plugged into one end of the ion wind generating tube, and a plurality of ion generating probes 4 radially plugged and fixed with cables 5 are fixedly arranged on the inner circumference of the positioning ring.

[0021] Preferably, the ion wind generating tube comprises an insulating tube 2, a copper tube 6 and an aluminum tube 7, wherein the copper tube and the aluminum tube are axially spaced and coaxially fixed in the insulating tube; a radially concave annular groove 8 is provided on the circumferential inner wall at one end of the insulating tube.

[0022] Preferably, the electrostatic precipitator further comprises a high-voltage pulse generator, the anode end of the high-voltage pulse generator is electrically connected to the copper tube, and the cathode end of the high-voltage pulse generator is electrically connected to the aluminum tube.

[0023] Preferably, a radially outwardly protruding insert ring 9 is provided on the circumferential outer wall at one end of the positioning ring, and the positioning ring includes two oppositely arranged half rings; the half rings are made of insulating material, and ion generating probes are radially fixed on each of the half rings.

[0024] Preferably, the electrostatic precipitator further comprises a DC power supply, the positive terminal and the negative terminal of the DC power supply are electrically connected to the ion generating probes on the two half rings respectively.

[0025] In order to more clearly describe the specific implementation mode of the present invention, an embodiment is provided below:

[0026] The working principle of the present invention is:

[0027] 1. Each electrostatic dust removal unit contains an ion fan and positive and negative ion generators.

[0028] 1. Ion fan: The positive and negative electrodes of the high-voltage signal generator are connected to the copper tube (anode) and the aluminum tube (cathode) respectively, where the high-voltage signal input voltage is AC220V and the output is 15kV; the inner diameter of the copper tube is 4cm, the outer diameter is 5cm, and the tube length is 8cm; the inner diameter of the aluminum tube is 4cm, the outer diameter is 5cm, and the tube length is 2cm; the distance between the copper tube and the aluminum tube is 2cm; the copper tube and the aluminum tube are fixed on the insulating board, and the insulating board is made of electrical laminated wood with a size of 16cm*8cm*3cm. The cathode is ionized and discharged through the high-voltage anode, thereby generating a large number of positive and negative charged particles. Under the action of the strong electric field, the positive charged particles move toward the negative electrode, collide with the air molecules during the movement to exchange momentum, thereby generating gas flow and forming ion wind (the air volume can be increased by increasing the number of copper and aluminum tubes).

[0029] The ion fan has no blades and no rotating mechanism, which can achieve the effect of silent blowing and reduce the noise of high-voltage cable grinding site. At the same time, the ion fan is small in thickness, which is convenient for use in the installation site of high-voltage cable accessories with narrow space.

[0030] 2. Positive and negative ion generator: It is composed of needle electrode, columnar electrode and high voltage generator. The needle electrode is made of copper (anode), the columnar electrode is made of aluminum (cathode), the input voltage of the high voltage generator is 220V, and the output voltage is 20kV. The high voltage generator applies a strong electric field between the needle electrode and the columnar electrode to ionize the molecules in the air, generating negative ions and positive ions, which are blown in the direction where dust removal is required under the action of the ion fan. The negative ions can absorb and precipitate particulate matter in the air, while the large amount of negatively charged cross-linked polyethylene dust generated during the cable insulation grinding process is neutralized by the positive ions.

[0031] 2. Flexible connecting wire

[0032] To further improve the dust removal effect, the flexible characteristics of the braided copper wire are used to connect multiple units together. The unit spacing is 20 cm, which can achieve large-area dust removal while storing the entire ion dust removal device into a portable small device. The insulating material required to wrap the braided copper wire is polyvinyl chloride (PVC), which has strong ductility, wear resistance, high temperature resistance, good electrical insulation performance, good processability, and low cost.

[0033] In order to solve the problem of different amounts of grinding dust caused by different voltage levels of high-voltage cables, the flexible connecting wire adopts a pluggable design to realize the combined use of multiple sets of electrostatic dust removal units and increase the dust removal effect.

[0034] 3. Insulation board

[0035] The insulating board is made of polypropylene, and an electrostatic precipitator unit is installed every 15 cm on each insulating board. 8 electrostatic precipitator units are installed on each insulating board.

[0036] At the same time, a pluggable rotating shaft is installed behind each electrostatic precipitator unit between the upper and lower insulating plates, so that the upper and lower insulating plates can be bent and folded according to the size of the high-voltage cable, and the angle of the electrostatic precipitator unit on each insulating plate and the position of the distance from the cable can be adjusted, thereby forming a surrounding electrostatic precipitator effect along the axial direction of the high-voltage cable, thereby improving the dust removal efficiency and effect.

[0037] In addition, the rear wall of the insulation board also adopts a hook design, which can be hung on the side walls of work pits, trenches, tunnels, etc., 0.8 to 1m away from construction workers, to achieve electrostatic dust removal in closed spaces such as work pits and tunnels.

[0038] 4. Electrostatic adsorption film

[0039] An electrostatic adsorption film is used to adsorb the dust after static electricity is eliminated. An electrostatic adsorption film is laid under the cable grinding area and on the opposite side of the electrostatic dust removal device to adsorb and collect dust, reducing the dust content in the air, thereby further improving the reliability of cable accessory installation.

[0040] 1. The unit modules of the present invention are connected by braided copper wires, which are easy to fold, greatly reducing the volume of the entire device, making it portable and more practical.

[0041] 2. The present invention can largely remove a large amount of cross-linked polyethylene dust generated during the cable insulation grinding process, thereby improving the installation reliability of cable accessories.

[0042] 3. The present invention can effectively remove dust, reduce the risk of construction workers inhaling dust and affecting their health, and effectively ensure the personal safety of construction workers.

[0043] Finally, all the parts of the invention not fully described adopt mature products and mature technical means in the existing technology.

[0044] In the description of this specification, reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the embodiment or example of the invention.

[0045] Although embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A foldable electrostatic dust removal device for high voltage cable insulation grinding, characterized in that: It includes a folding frame, a positioning ring and an ion wind generating tube; the folding frame includes multiple insulating plates arranged in parallel, each insulating plate is penetrated and fixed with multiple ion wind generating tubes, and the ion wind generating tubes on the multiple insulating plates are connected by wires; the positioning ring is axially limited and plugged into one end of the ion wind generating tube, and the inner circumference of the positioning ring is fixed with multiple ion generating probes that are radially plugged and fixed with cables.

2. A foldable electrostatic dust removal device for high-voltage cable insulation polishing according to claim 1, characterized in that: The ion wind generating tube comprises an insulating tube, a copper tube and an aluminum tube, wherein the copper tube and the aluminum tube are axially spaced and coaxially fixed in the insulating tube; a radially concave annular groove is provided on the circumferential inner wall of one end of the insulating tube.

3. A foldable electrostatic dust removal device for high-voltage cable insulation polishing according to claim 2, characterized in that: The electrostatic precipitator also includes a high-voltage pulse generator, the anode end of the high-voltage pulse generator is electrically connected to the copper tube, and the cathode end of the high-voltage pulse generator is electrically connected to the aluminum tube.

4. A foldable electrostatic dust removal device for high-voltage cable insulation grinding according to claim 2, characterized in that: A radially outwardly protruding insert ring is provided on the circumferential outer wall at one end of the positioning ring. The positioning ring includes two oppositely arranged half rings; the half rings are made of insulating material, and ion generating probes are radially fixed on the half rings.

5. A foldable electrostatic dust removal device for high-voltage cable insulation grinding according to claim 4, characterized in that: The electrostatic precipitator also includes a direct current power supply, the positive terminal and the negative terminal of the direct current power supply are electrically connected to the ion generating probes on the two half rings respectively.

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