Silicone grease coating structure and method for high-voltage cable of hot-rolled multifunctional thickness measuring instrument

Abstract

The invention discloses and provides a hot-rolled multifunctional thickness measuring instrument high-voltage cable silicone grease coating structure and method, which change the existing multifunctional thickness measuring instrument high-voltage cable silicone grease fixed thickness coating method taught by an instrument specification and a maintenance manual, and adopts a coating mode of gradually and uniformly thickening from front to back, the front side is as thin as possible, and the rear side is as thin as possible. The thickness of the rear side is maintained to be about 1.5 mm, so that the change condition of silicone grease at a high-voltage cable head can be simply, conveniently and intuitively seen, silicone grease coating operation of operators is facilitated, equipment arc damage caused by the fact that the silicone grease is extruded to an electrode is reduced, the loss rate of core elements of a high-voltage generator, a high-voltage cable and a ray tube of the multifunctional thickness measuring instrument is effectively reduced, and the service life of the multifunctional thickness measuring instrument is prolonged. The service life of the equipment is prolonged, the manual maintenance cost can be greatly reduced due to the increase of the stability, and the cost is greatly reduced and the efficiency is greatly improved in the spot inspection work of the hot rolling multifunctional thickness measuring instrument.

Description

Technical Field

[0001] The invention belongs to the technical field of large-scale measuring instrument equipment, and in particular relates to a silicone grease coating structure and method for a hot-rolled multifunctional thickness measuring instrument high-voltage cable. Background Art

[0002] At present, many steel companies' hot-rolled 2250 production lines and 1580 production lines are equipped with thickness gauges, such as THERMOFISHER's X-ray thickness gauge. This thickness gauge needs to be connected to the high-voltage generator and the X-ray tube with a high-voltage cable when in use. Because of the existence of high voltage, the high-voltage cable connection parts need to be regularly coated with silicone grease to ensure stable and reliable connection, and to ensure that no dust and air enter the high-voltage ionization area to cause high-voltage arc in the cable. Figure 2The schematic diagram of the application of silicone grease to the existing hot-rolled multifunctional thickness gauge high-voltage cable is shown. The front end of the high-voltage cable 1 of the thickness gauge is a high-voltage cable electrode 4. The rear side of the high-voltage cable electrode 4 is set in a truncated cone shape and wrapped with a high-voltage cable insulating rubber body 6. The rear side of the high-voltage cable insulating rubber body 6 is provided with a high-voltage cable fixing flange 3. The outer side of the high-voltage cable insulating rubber body 6 is coated with a silicone grease layer 7. One side of the thickness gauge ray tube 2 is provided with a ray tube cavity 8 that matches the high-voltage cable insulating rubber body 6. The front end of the ray tube cavity 8 is provided with a ray tube electrode 5 that matches the high-voltage cable electrode 4. The thickness gauge high-voltage cable 1 is inserted into the ray tube cavity 8 of the thickness gauge ray tube 2 so that the high-voltage cable electrode 4 is connected to the ray tube electrode 5, that is, the connection is completed. According to the instructions provided by the manufacturer and the work instructions for applying silicone grease to high-voltage cables in the maintenance manual, the insulating rubber body of the high-voltage cable head needs to be evenly coated with 1.5mm thick insulating silicone grease before it can be used. However, in actual application, after silicone grease is applied in this way, when the high-voltage cable is connected to the thickness gauge tube, the silicone grease moves forward and backward during the extrusion and tightening process, causing silicone grease to accumulate in front and behind the high-voltage cable head. Under the action of high voltage, it is more likely to produce arcs and sparks. In severe cases, it may even cause the burning of key components such as high-voltage generators and tubes, causing great trouble to on-site maintenance work. A deeper analysis of the reasons also includes the following aspects: First, there are fluctuations in the on-site power grid, which will cause high-voltage fluctuations in the instrument. High-voltage ionization and the silicone grease squeezed on the metal head of the high-voltage cable will cause a high-voltage short-circuit arc; second, the storage and use of silicone grease should require a good environment to ensure a constant temperature environment so that the quality will not decline, but this cannot be done on site, so that over time, the quality of the silicone grease is prone to problems; third, the manufacturer's instructions are data obtained in the test, and have not been tested on site, let alone long-term stability tests. Silicone grease usually has a certain hardness when it is first applied, but as time goes by, it will become more and more rigid. As time goes by, the high-voltage environment causes the temperature of the limited space to rise, causing the silicone grease to soften and flow. If it contacts the metal electrode, it is easy to cause a discharge arc phenomenon; fourth, there is vibration on the site, and it is a continuous and uninterrupted vibration, which causes the silicone grease of the high-voltage cable head to move to the terminal with less pressure under the action of pressure, causing liquid silicone grease to appear on the electrode and a high-voltage short circuit; fifth, the manufacturer believes that the maintenance of the equipment is continuous and problems should be discovered in time, but the actual situation is that due to the combined influence of factors such as personnel and time, the maintenance of the equipment is only intermittent work, and the discovery of problems is also delayed, making a little mistake easily delayed into a major equipment hidden danger. Therefore, researching a silicone grease application method that meets the actual situation on site and achieving the most optimized results in all aspects of requirements is the goal that technicians have been looking for. Summary of the invention

[0003] In view of the problems existing in the existing hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating method in the background technology, the present invention provides a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure and method, which can not only achieve the purpose of protecting high-voltage cables and insulation, but also reduce the serious damage to equipment caused by high-voltage arcs and sparks, effectively extend the cycle of the thickness gauge high-voltage cable silicone grease, improve the inspector's maintenance ability of the thickness measuring equipment, and at the same time, greatly reduce the consumption of spare parts.

[0004] The technical solution of the present invention to solve the technical problem is as follows:

[0005] On one hand, the present invention provides a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure, comprising a thickness gauge high-voltage cable and a thickness gauge ray tube; a high-voltage cable electrode is arranged at the front end of the thickness gauge high-voltage cable, the rear side of the high-voltage cable electrode is arranged in a truncated cone shape and wrapped with a high-voltage cable insulating rubber body, a high-voltage cable fixing flange is arranged at the rear side of the high-voltage cable insulating rubber body, a silicone grease layer is coated on the outer side of the high-voltage cable insulating rubber body from the high-voltage cable electrode to the back to the high-voltage cable fixing flange, and the thickness of the silicone grease layer gradually increases from front to back; a ray tube cavity matched with the high-voltage cable insulating rubber body is arranged on one side of the thickness gauge ray tube, and a ray tube electrode matched with the high-voltage cable electrode is arranged at the front end of the ray tube cavity.

[0006] As a further improvement of the technical solution, the thickness of the silicone grease layer increases linearly from front to back, with the front side close to 0 mm near the high-voltage cable electrode and the back side at the high-voltage cable fixing flange being 1.4-1.6 mm, preferably 1.5 mm.

[0007] On the other hand, the present invention provides a method for applying silicone grease to a hot-rolled multifunctional thickness gauge high-voltage cable structure described in the above technical solution, wherein silicone grease is evenly applied to the outside of the high-voltage cable insulating rubber body from the high-voltage cable electrode to the rear to the high-voltage cable fixing flange to form a silicone grease layer. During application, the thickness of the silicone grease layer is gradually increased from front to back, and then the high-voltage cable electrode at the front end of the thickness gauge high-voltage cable is inserted into the front side of the ray tube cavity of the thickness gauge ray tube and connected to the ray tube electrode, so that the silicone grease layer is sealed and filled between the ray tube cavity and the high-voltage cable insulating rubber body.

[0008] As a further improvement of the technical solution, when the silicone grease layer is applied, the thickness of the front side close to the high-voltage cable electrode is close to 0 mm, and the thickness of the rear side at the high-voltage cable fixing flange is 1.4-1.6 mm, and the preferred coating thickness is 1.5 mm.

[0009] Compared with the prior art, the present invention discloses a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure and method, which changes the multifunctional thickness gauge high-voltage cable silicone grease coating method taught in the existing instrument manual and maintenance manual, and adopts a coating method of gradually and evenly thickening from front to back, with the front side as thin as possible and the thickness of the back side maintained at about 1.5 mm. The change of silicone grease at the high-voltage cable head can be easily and intuitively seen, which is convenient for operators to apply silicone grease, reduces the arc hazard of equipment caused by silicone grease being squeezed onto the electrode, effectively reduces the loss rate of the core components of the multifunctional thickness gauge, the high-voltage generator, the high-voltage cable and the ray tube, and extends the service life of the equipment. At the same time, the effective period of silicone grease is also greatly improved, and the labor maintenance cost can be greatly reduced due to the increased stability, thereby achieving a great degree of cost reduction and efficiency improvement in the inspection work of the hot-rolled multifunctional thickness gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure when in use;

[0011] Figure 2 It is a structural schematic diagram of the existing hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure when in use;

[0012] In the figure: 1. Thickness gauge high-voltage cable; 2. Thickness gauge X-ray tube; 3. High-voltage cable fixing flange; 4. High-voltage cable electrode; 5. X-ray tube electrode; 6. High-voltage cable insulating rubber body; 7. Silicone grease layer; 8. X-ray tube cavity. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The terms "upper", "lower", "left", "right", "front", "back", etc. used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly; "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Anything not described in detail in the present invention is a known technology to those skilled in the art.

[0015] The implementation is explained by taking the multifunctional thickness gauge model RM312 used online in a steel plant as an example.

[0016] like Figure 1 As shown, a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure comprises a thickness gauge high-voltage cable 1 and a thickness gauge ray tube 2; a high-voltage cable electrode 4 is arranged at the front end of the thickness gauge high-voltage cable 1, the rear side of the high-voltage cable electrode 4 is arranged in a truncated cone shape and wrapped with a high-voltage cable insulating rubber body 6, a high-voltage cable fixing flange 3 is arranged at the rear side of the high-voltage cable insulating rubber body 6, a silicone grease layer 7 is coated on the outer side of the high-voltage cable insulating rubber body 6 from the high-voltage cable electrode 4 to the high-voltage cable fixing flange 3, and the thickness of the silicone grease layer 7 gradually increases from the front to the back, and the thickness increase is linear, the front side of the silicone grease layer is close to 0mm near the high-voltage cable electrode 4, as thin as possible, usually not more than 0.1mm, and the thickness of the rear side at the high-voltage cable fixing flange 3 is 1.4-1.6mm, preferably 1.5mm; a ray tube cavity 8 matched with the high-voltage cable insulating rubber body 6 is arranged on one side of the thickness gauge ray tube 2, and a ray tube electrode 5 matched with the high-voltage cable electrode 4 is arranged at the front end of the ray tube cavity 8.

[0017] When the above structure is coated with silicone grease, silicone grease is evenly applied on the outside of the high-voltage cable insulating rubber body 6 from the high-voltage cable electrode 4 to the high-voltage cable fixing flange 3 to form a silicone grease layer 7. When applying, the thickness of the silicone grease layer 7 is evenly increased from front to back. The thickness of the front side near the high-voltage cable electrode 4 is close to 0 mm, forming an extremely thin layer. The thickness of the back side at the high-voltage cable fixing flange 3 is 1.4-1.6 mm, preferably 1.5 mm thick. Then, the high-voltage cable electrode 4 at the front end of the thickness gauge high-voltage cable 1 is inserted into the front side of the ray tube cavity 8 of the thickness gauge ray tube 2 and connected to the ray tube electrode 5, so that the silicone grease layer 7 is sealed and filled between the ray tube cavity 8 and the high-voltage cable insulating rubber body 6.

[0018] After the above method was applied, it was tested that there was no thin oil silicone grease at the electrode, and the tail also maintained a good seal, achieving the optimization goal; and thus tracking and observing the stability cycle, after using the new method to apply high-voltage cable silicone grease, the X-ray tube had clean electrodes and good tail seals after a period of operation, and the overall state was stable, without any damage to the X-ray tube and high-voltage generator, and the overall silicone grease coating state could be maintained for 6 months.

Claims

1. A hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure, characterized in that: The invention comprises a thickness gauge high-voltage cable (1) and a thickness gauge ray tube (2); a high-voltage cable electrode (4) is arranged at the front end of the thickness gauge high-voltage cable (1); the rear side of the high-voltage cable electrode (4) is arranged in a truncated cone shape and is wrapped with a high-voltage cable insulating rubber body (6); a high-voltage cable fixing flange (3) is arranged at the rear side of the high-voltage cable insulating rubber body (6); a silicone grease layer (7) is applied on the outer side of the high-voltage cable insulating rubber body (6) from the high-voltage cable electrode (4) to the high-voltage cable fixing flange (3); and the thickness of the silicone grease layer (7) gradually increases from the front to the back; a ray tube cavity (8) matched with the high-voltage cable insulating rubber body (6) is arranged on one side of the thickness gauge ray tube (2); and a ray tube electrode (5) matched with the high-voltage cable electrode (4) is arranged at the front end of the ray tube cavity (8).

2. The hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure according to claim 1 is characterized in that: The thickness of the silicone grease layer (7) increases linearly from front to back, with the front side close to the high-voltage cable electrode (4) being close to 0 mm, and the rear side being 1.4-1.6 mm thick at the high-voltage cable fixing flange (3).

3. The hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure according to claim 2 is characterized in that: The thickness of the rear side of the silicone grease layer (7) at the high-voltage cable fixing flange (3) is 1.5 mm.

4. A method for applying silicone grease to a hot-rolled multifunctional thickness gauge high-voltage cable according to any one of claims 1 to 3, characterized in that: Silicone grease is evenly applied on the outside of the high-voltage cable insulating rubber body (6) from the high-voltage cable electrode (4) to the rear to the high-voltage cable fixing flange (3) to form a silicone grease layer (7). When applying, the thickness of the silicone grease layer (7) is evenly and gradually increased from the front to the rear. Then, the high-voltage cable electrode (4) at the front end of the thickness gauge high-voltage cable (1) is inserted into the front side of the ray tube cavity (8) of the thickness gauge ray tube (2) and connected to the ray tube electrode (5), so that the silicone grease layer (7) is sealed and filled between the ray tube cavity (8) and the high-voltage cable insulating rubber body (6).

5. According to claim 4, a method for applying silicone grease to a hot-rolled multifunctional thickness gauge high-voltage cable structure, characterized in that: When the silicone grease layer (7) is applied, the thickness of the front side close to the high-voltage cable electrode (4) is close to 0 mm, and the thickness of the rear side at the high-voltage cable fixing flange (3) is 1.4-1.6 mm.

6. According to claim 6, a method for applying silicone grease to a hot-rolled multifunctional thickness gauge high-voltage cable structure, characterized in that: When the silicone grease layer (7) is applied, the thickness of the silicone grease layer (7) on the rear side thereof at the high-voltage cable fixing flange (3) is 1.5 mm.

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