A hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure and method

Abstract

The present invention discloses a structure and method for applying silicone grease to a high-voltage cable of a hot-rolled multifunctional thickness gauge. The structure and method change the method for applying silicone grease to the high-voltage cable of the multifunctional thickness gauge as taught in the existing instrument manual and maintenance manual. The structure adopts a method of applying silicone grease with a gradually and evenly increasing thickness from front to back, with the front side being as thin as possible and the back side thickness being maintained at about 1.5 mm. The changes in the silicone grease at the high-voltage cable head can be easily and intuitively seen, facilitating the silicone grease application operation for operators, reducing the arc hazard of the equipment caused by the silicone grease being squeezed onto the electrode, effectively reducing the loss rate of the core components of the multifunctional thickness gauge, namely the high-voltage generator, the high-voltage cable and the ray tube, thereby extending the service life of the equipment. The increased stability can greatly reduce the labor maintenance cost, thereby achieving a great degree of cost reduction and efficiency improvement in the inspection work of the hot-rolled multifunctional thickness gauge.

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. When using this thickness gauge, a high-voltage cable is required to connect the high-voltage generator and the X-ray tube. Due to the existence of high voltage, the high-voltage cable connection parts need to be regularly coated with silicone grease to ensure stable and reliable connections and to ensure that no dust and air enter the high-voltage ionization area to cause high-voltage arcing in the cable. Figure 2A schematic diagram of the application of silicone grease to a conventional hot-rolled multifunctional thickness gauge high-voltage cable is shown. The front end of the thickness gauge high-voltage cable 1 is a high-voltage cable electrode 4. The rear side of the high-voltage cable electrode 4 is configured in a truncated cone shape and wrapped with a high-voltage cable insulating rubber body 6. A high-voltage cable fixing flange 3 is located behind the high-voltage cable insulating rubber body 6. The outer surface of the high-voltage cable insulating rubber body 6 is coated with a layer of silicone grease 7. A tube cavity 8 is provided on one side of the thickness gauge ray tube 2, which is compatible with the high-voltage cable insulating rubber body 6. A tube electrode 5 is located at the front end of the tube cavity 8, which is compatible with the high-voltage cable electrode 4. Inserting the thickness gauge high-voltage cable 1 into the tube cavity 8 of the thickness gauge ray tube 2 connects the high-voltage cable electrode 4 and the tube electrode 5, completing the connection. According to the manufacturer's instructions and maintenance manual for applying silicone grease to high-voltage cables, the insulating rubber body of the high-voltage cable head needs to be evenly coated with 1.5mm of insulating silicone grease before use. 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, arcing and sparking are more likely to occur. 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 will cause the silicone grease squeezed on the metal head of the high-voltage cable to 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, making it easy for the quality of the silicone grease to have problems over time; third, the manufacturer's instructions are based on 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 Over time, the high-voltage environment causes the temperature of the confined space to rise, causing the silicone grease to soften and flow. If it comes into contact with metal electrodes, it can easily cause discharge arcing. Fourth, there is vibration on site, and it is continuous and uninterrupted. Under the action of pressure, the silicone grease of the high-voltage cable head moves to the terminal with lower pressure, causing liquid silicone grease to appear on the electrode and a high-voltage short circuit. Fifth, manufacturers believe that equipment maintenance is continuous and problems should be discovered in a timely manner. However, the actual situation is that due to the combined influence of factors such as personnel and time, equipment maintenance is only intermittent. The discovery of problems also has a lag, making it easy for even the smallest mistakes to become major equipment hazards. Therefore, developing a silicone grease application method that meets the actual site conditions and achieves the optimal results in all aspects of the requirements is the goal that technicians have been looking for. Summary of the Invention

[0003] In response to 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, significantly 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 provided at the front end of the thickness gauge high-voltage cable, the rear side of the high-voltage cable electrode is configured in a truncated cone shape and is wrapped with a high-voltage cable insulating rubber body, a high-voltage cable fixing flange is provided 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 rear side to the high-voltage cable fixing flange, and the thickness of the silicone grease layer gradually increases from the front to the back; a ray tube cavity adapted to the high-voltage cable insulating rubber body is provided on one side of the thickness gauge ray tube, and a ray tube electrode adapted to the high-voltage cable electrode is provided 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 having a thickness of 1.4-1.6 mm at the high-voltage cable fixing flange, 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 silicone grease coating structure as 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 backward 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, preferably 1.5 mm.

[0009] Compared with the prior art, the present invention discloses a structure and method for applying silicone grease to a high-voltage cable of a hot-rolled multifunctional thickness gauge, which changes the method of applying silicone grease to the high-voltage cable of the multifunctional thickness gauge as taught in the existing instrument instructions and maintenance manuals, and adopts a method of gradually and evenly thickening the grease from front to back. The front side is as thin as possible, and the thickness of the back side is maintained at about 1.5 mm. The changes in the silicone grease at the high-voltage cable head can be easily and intuitively seen, which facilitates the silicone grease application operation of the operator, reduces the arc hazard of the equipment caused by the 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 cycle of the 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 This is a structural schematic diagram of a hot-rolled multifunctional thickness gauge high-voltage cable silicone grease coating structure in use;

[0011] Figure 2 This is a structural 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0014] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill 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 words 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 common knowledge to those skilled in the art.

[0015] The implementation is explained by taking the RM312 multifunctional thickness gauge 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 includes a thickness gauge high-voltage cable 1 and a thickness gauge ray tube 2; a high-voltage cable electrode 4 is provided at the front end of the thickness gauge high-voltage cable 1, and the rear side of the high-voltage cable electrode 4 is configured in a truncated cone shape and wrapped with a high-voltage cable insulating rubber body 6, a high-voltage cable fixing flange 3 is provided at the rear side of the high-voltage cable insulating rubber body 6, and 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 rear of 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 is close to 0 mm near the high-voltage cable electrode 4 and is as thin as possible, usually not more than 0.1 mm. The rear side is 1.4-1.6 mm thick at the high-voltage cable fixing flange 3, and the preferred thickness is 1.5 mm; a ray tube cavity 8 adapted to the high-voltage cable insulating rubber body 6 is provided on one side of the thickness gauge ray tube 2, and a ray tube electrode 5 adapted to the high-voltage cable electrode 4 is provided at the front end of the ray tube cavity 8.

[0017] When applying silicone grease to the above-mentioned structure, 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 back 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 back. The thickness of the silicone grease layer 7 is close to 0 mm near the high-voltage cable electrode 4 on the front side, forming an extremely thin layer. The thickness of the silicone grease layer 7 on 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 applying the above method, tests showed 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. The overall state was stable, and there was no damage to the X-ray tube and high-voltage generator. 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 by: The invention comprises a thickness gauge high-voltage cable (1) and a thickness gauge ray tube (2); a high-voltage cable electrode (4) is provided 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 provided at the rear side of the high-voltage cable insulating rubber body (6); and a silicone grease layer (7) is applied to the outer side of the high-voltage cable insulating rubber body (6) from the high-voltage cable electrode (4) to the rear side of the high-voltage cable fixing flange (3). ), and the thickness of the silicone grease layer (7) gradually increases from front to back, the thickness of the front side of the silicone grease layer (7) close to the high-voltage cable electrode (4) is close to 0mm, and the thickness of the rear side of the silicone grease layer (7) at the high-voltage cable fixing flange (3) is 1.4-1.6mm; a ray tube cavity (8) adapted to the high-voltage cable insulating rubber body (6) is provided on one side of the thickness gauge ray tube (2), and a ray tube electrode (5) adapted to the high-voltage cable electrode (4) is provided 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, 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.

3. A method for applying silicone grease to a hot-rolled multifunctional thickness gauge high-voltage cable according to claim 1 or 2, 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).

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