The UHV-6kV mine high-voltage rubber sheathed cables are all used for the high-voltage power transmission of the mining equipment's main excavation equipment. Because the sealing and insulation properties and mechanical strength of the conventional plugging and binding methods do not meet the relevant technical requirements, frequent grounding, short circuiting, and shot blasting of cable joints occur frequently in rainy days and become a long-term trouble for the mining area. Difficulties in production operations. Through repeated investigations on the processing methods of mine high-pressure rubber-jacketed cable joints for other mines, combined with the actual conditions of the mine's stope, they finally decided to use cold-cure vulcanization technology for the treatment of high-voltage rubber-sheathed cable joints.
(1) Mine high-pressure rubber bushing cable joint cold-sulfur treatment 1 Filler for mine high-pressure rubber bushing cable joints.
The use of JA-8 mining cable PU cold glue. It has the characteristics of fast curing at room temperature, strong adhesion with cable sheath, tensile resistance, tear resistance, wear resistance and good electrical insulation properties, and it is a good potting material for cable joints on site.
2 Exploitation of mining high-pressure rubber sleeve cable joints.
50mm on both sides of the mining high-pressure rubber-jacketed cable joint is cut into a conical shape, and the distance between the conical shape and the cylindrical boundary of both cables is 350mm. The core of the joint is stripped off the length of the skin by about 30mm and is connected by a copper pressure pipe to ensure the quality of crimping. Wrap the tape with plastic wrap to increase the degree of insulation between the cores. Before repairing, it is necessary to disconnect the power supply, and then remove the mineral powder and oil stains on the damaged area of ​​the mining high-voltage rubber-jacketed cable and on the surrounding surface. The taper on both sides of the rubber-jacketed cable joints was beaten with a mallet, exposed fresh surfaces, and kept clean.
3 Mine high-pressure rubber sleeve cable connector mold.
The choice of mold is one of the keys to ensure the curing of joints. The moulds made of high-pressure polyethylene sheets are disposable consumables, which are used only in workshops and flat areas and have long demoulding time. The material of the self-made mold is Q235 ordinary carbon structural steel, also called A3 plate. This mold has high strength and can be used for a long time. Three M20 tapped holes were drilled in the middle of the length of the self-made mold. One of them was used to install the feed funnel, and the other two were used as vents to ensure the smooth discharge of gas between the mold and the filler. The mold is half opened and its inner surface is galvanized to improve the finish of the cable joint surface.
4 mining high-pressure rubber sleeve cable connector rubber filling.
Straighten the cable of the repair section as far as possible, place it in a horizontal position, install the mold on the joint of the cable, and tighten the three screw holes upwards. Use M10 bolts to fasten and open the A and B component packaging cans of the rubber material. All components of Part B are poured into the A component, rapidly stirred with a dry stir bar for about 1 minute, and the uniformly mixed compound is slowly poured into the funnel. When the overflow holes on both sides of the funnel flow out of the glue, it means that the cavity of the mold may have been filled with glue, and the casting of the glue can be stopped at this time. About 1.5kg of rubber is needed for each cable connector. It can be put into use after 0.5h in summer and 1h in winter.
(2) Cold-cure vulcanizing effect of mining high-pressure rubber-jacketed cable joints So far, the company's iron ore mine has applied cold-resin vulcanization treatment to the high-pressure rubber-jacketed cable joints of 7 main equipments in the mining field. The practice of the mine for many years has proved that this kind of processing technology solves the problem of mining high pressure rubber bushing cable joints.
1 Water resistance test.
They put the vulcanized high-pressure rubber-jacketed cable joints into the water, and never had a cable joint grounded or short-circuited. The power outage caused by cable joints during the rainy season is also almost zero. According to the mine's statistical data, the number of failures from January to July is 8, 11, 12, 14, 17, 20, and 22 times before the mining field high-pressure rubber-jacketed cable joints are cold-clamped and vulcanized. After the high-pressure rubber-jacketed cable joints were cold-clamped and vulcanized, the number of failures from January to July was 0, 1, 0, 1, 2, 2, and 2 respectively. From the mining mine's mining high-voltage rubber cable fault statistical curve chart can also be seen that the cold curve before the vulcanization process is larger, the mine high-pressure rubber cable failure rate with the arrival of the rainy season has increased dramatically; The waterproof performance of the cable joints after the cold-cure vulcanization process is good, and the normal transmission of electricity can be guaranteed in winter and rainy seasons.
2 cost analysis.
The mine mining field mine high-pressure rubber sheathed cable adopts the average number of times of monthly failure of the cold-cure vulcanization technology l5 times, the joint direct consumption cost is l500 yuan/month, and the annual average cable consumption fee is 8300 yuan/month, and the output caused by joints The loss is l3608 yuan/month, and the total consumption is 23,408 yuan/month. After cold curing process, the consumption of plastic materials for each joint is 76.5 yuan, the cost of high-pressure self-adhesive tape is 17.5 yuan/month, the direct cost of joints is 6,700 yuan/month, and the output loss is 328 yuan/month. The total cost The consumption is 7111 yuan/month. Annual savings of mining high-pressure rubber sheathed cable 23408-7ll3=l6295 yuan/month.
(3) Experience
The cold-pressurized mine high-pressure rubber bushing cable connector has good waterproofness, electrical insulation and safety, and is particularly suitable for rainy season production operations; the entire vulcanization process is on-site operation, simple and convenient, can be completed by ordinary workers, joint processing The time is short and the production resumes quickly; the economic benefits are considerable, and the total cost can be reduced by 19,540 yuan per year; it has good tensile and compressive mechanical strength.
Aluminum Metal step roof tiles produced by Roof Tile Roll Forming Machine from high quality colored coated galvanized steel most time apply as roofing on Villas or some residential house.
There is only one but key difference between a metal glazed roof tile and a regular metal roof panel: Steps! Usually speaking, a regular metal roof panel with steps is called a metal glazed roof tile! Therefore the key difference between a normal metal Roof Panel Roll Forming Machine and a metal glazed tile Roll Forming Machine lies at this situation that there is an extra hydraulic pressing device on a step tile roll forming machine to press steps on the roll formed roof panels.
Machine designers always build the hydraulic pressing between roll forming part and hydraulic cutter so that the depth, distance and quantities of steps can be adjustable and clients can change any time throught the touch screen on PLC control box.
Brief Introduction of the Glazed Tile Roll Forming Machine:It`s true to name a regular metal roof panel with steps glazed roof tile roll forming machine, but not all the metal roof panels can be pressed with steps. It means we can press steps just on certain metal roof panels, and that often makes a step tile roll forming machine looks different from a regular roof Panel Roll Forming Machine.
Most of time, a glazed tile roll forming machine has more roll forming stations and rolling tools than a regular roof panel roll forming machine does, and an extra hydraulic pressing device also contributes a higher price compared to a regular metal roofing panel roll forming machine.
Usually a glazed tile roll forming machine consists of a Manual Decoiler , feeding guide, roll forming system, transmission system, control system, hydraulic system, hydraulic pressing device, hydraulic cutting and runout tables. Besides, it can also includes a hydraulic decoiler and an auto stacking machine sometimes as per request.
Roof Tile Roll Forming Machine
Roof Tile Roll Forming Machine,Floor Deck Roll Forming Machine,Roll Forming Machine Used,Roof And Floor Tile Making
Botou Golden Integrity Roll Forming Machine Co.,Ltd , https://www.jcxsteelrollformer.com
![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)