CN204327988U - A kind of seal arrangement for RH refining furnace roof rifle - Google Patents

Abstract

The utility model provides a refining furnace top lance sealing device applied in the technical field of RH refining furnaces. The sealing device is set on the top lance body (1), and the sealing ring (3) is installed on the sealing seat (2). A groove (4) is arranged on the sealing ring (3), a steel ring (5) is installed in the groove (4), the sealing seat (2) is set on the outer surface of the top gun body (1), the steel ring (5) and the sealing ring (3) are all set on the top gun body (1), the steel ring (5) and the sealing ring (3) are set to be located between the sealing seat (2) and the top gun body (1), the steel ring (5) A recessed friction groove (6) is arranged on the side. In the sealing device of the utility model, during the working process, the sealing seat and the sealing ring are fixed tightly, and the sealing ring will not rush out of the sealing seat after the sealing ring bulges, and can reliably return to the original position after pressure relief, ensuring that the vacuum degree reaches the standard and improving the silicon steel The production quality and top gun failure rate have been greatly reduced, ensuring the production of silicon steel and effectively reducing costs.

Description

A sealing device for RH refining furnace top gun

technical field

The utility model belongs to the technical field of RH refining furnaces, and more specifically relates to a sealing device for RH refining furnace top guns.

Background technique

The RH refining furnace in the steelmaking area is the key equipment for silicon steel production. Whether the vacuum degree of the RH refining furnace reaches the standard directly affects the stability of silicon steel production. The sealing device of the RH refining furnace top lance includes an expansion sealing ring. The expansion sealing ring is used to lift the rubber concave sealing ring through the air pressure and wrap the top lance to achieve the sealing effect of the top lance hole of the vacuum chamber. In actual use, because the sealing seat is not tightly fixed, the rubber sealing ring will rush out of the sealing seat after it bulges and cannot return to the retracted original position. As a result, the degree of vacuum cannot reach the standard, which affects the quality of silicon steel production. At the same time, the rubber expansion sealing ring is greatly lost, and almost every production group needs to replace 2 to 3, which is labor-intensive.

Utility model content

The technical problem to be solved by the utility model is: aiming at the deficiencies in the prior art, provide a simple structure, which can effectively improve the sealing performance of the RH refining furnace, reduce the failure rate of the sealing ring, ensure the normal production of the RH refining furnace, thereby reducing production Cost-effective seals for RH refining top guns.

To solve the technical problems described above, the technical solution that the utility model takes is:

The utility model relates to a sealing device for a RH refining furnace top lance, the sealing device is set on the top lance body, the sealing device includes a sealing ring and a sealing seat, the sealing ring is installed on the sealing seat, and the sealing A groove is set on the ring, and a steel ring is installed in the groove. The sealing seat is set on the outer surface of the top gun body. Both the steel ring and the sealing ring are set on the top gun body. Between the positions, the side of the steel ring is provided with recessed friction grooves.

The sealing seat is of annular structure, the lower end of the sealing seat is provided with a protruding boss, the lower end surface of the sealing ring is against the boss, and the inner surface of the sealing ring is attached to the top gun body, and the sealing device also includes Gland, the gland is set on the top gun body.

The gland abuts against the sealing seat and the side surface of the sealing ring, and a plurality of anti-skid grooves are provided on one surface of the gland abutting against the side surface of the sealing ring.

The sealing seat includes an upper base and a lower base, the upper base and the lower base are set on the top gun body, the boss is arranged on the upper base, and the lower base and the upper base are fixedly connected by stainless steel bolts.

The gland is connected to the upper base, the gland and the upper base are connected by a plurality of stainless steel bolts, the upper base is connected to the air source through a connecting air pipe, a self-operated pressure reducing valve is arranged on the connecting air pipe, and air holes are arranged on the steel ring .

The sealing ring, the steel ring, the gland, and the upper base are closely fitted together, and the sealing ring is provided with two inwardly bent recesses.

By adopting the technical scheme of the utility model, the following beneficial effects can be obtained:

The sealing device used in the RH refining furnace top gun described in the utility model, when in use, the rubber sealing ring is lifted by the air pressure of the air source, and when the top gun body is wrapped, the concave friction groove on the side of the steel ring and The friction between the anti-slip groove and the sealing ring increases the friction strength of the end face between the sealing ring, the sealing seat and the gland, enhances the sealing performance and expansion effect of the sealing ring, wraps the top gun tightly, and reduces the vacuum chamber top gun hole leakage, which improves the vacuum degree of the RH furnace; at the same time, the sealing device of the utility model makes the positioning of the sealing ring reliable, ensuring that the sealing seat and the sealing ring are fixed tightly during the working process of the top gun, and the sealing ring will not be flushed when it bulges. out of the sealing seat, and can be reliably restored to its original position after pressure relief, and the sealing ring will not be damaged when the top gun is raised and lowered, ensuring that the vacuum degree reaches the standard, improving the production quality of silicon steel, and the failure rate of the top gun is greatly reduced, so that the vacuum degree can be stabilized at the target Within the value range, the production of silicon steel is guaranteed, and the cost is effectively reduced.

Description of drawings

The following is a brief description of the contents expressed in the drawings of this manual and the marks in the drawings:

Fig. 1 is the structural representation of the connection between the top lance body and the base of the RH refining furnace top lance described in the utility model;

Fig. 2 is the partially enlarged structural schematic diagram of the connection between the top lance body and the base of the RH refining furnace top lance described in the utility model;

The marks in the drawings are: 1. Top gun body; 2. Top gun base; 3. Seal ring; 4. Groove; 5. Steel ring; 6. Recessed friction groove; 7. Boss; 8. Gland ;9. Side of sealing ring; 10. Anti-skid groove; 11. Upper base; 12. Lower base; 13. Stainless steel bolt; 14. Connecting air pipe; 15. Self-operated pressure reducing valve; 18. Air source.

Detailed ways

Below with reference to accompanying drawing, through the description of embodiment, to the specific embodiment of the present utility model such as the shape of each member involved, structure, mutual position and connection relationship between each part, the effect of each part and working principle etc. Further details:

As shown in accompanying drawings 1 and 2, the utility model is a sealing device for RH refining furnace top lance, the sealing device is set on the top lance body 1, and the sealing device includes a sealing ring 3 , the sealing seat 2, the sealing ring 3 is installed on the sealing seat 2, the groove 4 is set on the sealing ring 3, the steel ring 5 is installed in the groove 4, the sealing seat 2 is set on the outer surface of the top gun body 1, the steel ring 5 and the sealing The rings 3 are all set on the top gun body 1, the steel ring 5 and the sealing ring 3 are arranged at a position between the sealing seat 2 and the top gun body 1, and the side of the steel ring 5 is provided with a recessed friction groove 6. Through the above structure, the sealing ring and the sealing seat are reliably connected, the recessed friction groove 6 is set, and the rubber sealing ring 3 is lifted by the air pressure of the air source 18. When wrapping the top gun, the recessed friction groove on the side of the steel ring 5 6 generates friction with the sealing ring 3, which increases the friction strength of the end faces between the two, improves the sealing performance and expansion effect of the sealing ring, and enhances the sealing effect of the entire sealing device.

The sealing seat 2 is a ring structure, the lower end of the sealing seat 2 is provided with an outwardly protruding boss 7, the lower end surface of the sealing ring 3 is against the boss 7, and the inner surface of the sealing ring 3 is attached to the top gun body 1, The sealing device also includes a gland 8 which is sleeved on the top gun body 1 . The setting of the boss 7 can realize the reliable placement of the sealing ring, and the gland 8 abuts against the sealing ring 3, realizing the reliable positioning of the sealing ring 3, ensuring that the sealing seat and the sealing ring can be secured during the working process of the top gun. 3. It is fixed tightly. After the sealing ring 3 bulges, it will rush out of the sealing seat and can be reliably restored to its original position. When the top gun is lifted and lowered, the sealing ring 3 will not be damaged. Production quality.

In the sealing device of the present utility model, the gland 8 and the upper base 11 are fixedly connected by stainless steel bolts 13, so that the gland 8, the upper base 11, the sealing ring 3 and the steel ring 5 can be tightly combined. During the working process of the top gun, the air source 18 obtains stable air pressure through the self-operated pressure reducing valve 15, enters the air hole 16 provided by the steel ring 5 through the air inlet of the upper base 11, and inflates the sealing ring 3 to wrap the top gun tightly. Due to the addition of the recessed friction groove 6 and the anti-skid groove 10, the friction strength between the sealing ring 3 and the two contact surfaces of the upper base 11 and the side of the steel ring 5 is further enhanced, ensuring that the sealing ring 3 will not be blown by air pressure when it expands. Damaged by coming out of the base. At the same time, the enhancement of the friction strength of the two contact surfaces ensures the good sealing performance of the sealing ring 3 and reduces the leakage of gas, so that the sealing ring 3 can reliably expand, wrap, retract and recover under the action of air pressure, without It was pulled and damaged during the lifting and lowering of the top gun. The role of the sealing ring 3 ensures the sealing of the gun hole on the top of the vacuum chamber, reduces leakage, ensures that the vacuum degree reaches the standard, and improves the production quality of silicon steel.

The gland 8 set on the top gun body 1 abuts against the top gun base 2 and the side surface 9 of the sealing ring, and the top gun gland 8 abuts against the side surface of the sealing ring side 9 to set a plurality of Anti-skid groove 10.

The gland 8 abuts against the sealing seat 2 and the side surface 9 of the sealing ring, and a plurality of anti-slip grooves 10 are provided on one side surface of the gland 8 abutting against the side surface 9 of the sealing ring. The setting of anti-skid groove 10, when by the air pressure of air source 18 the sealing ring 3 of rubber is jacked up, when wrapping top gun, the setting of anti-skid groove 10 has improved the friction intensity between base, top gun gland and sealing ring.

The sealing seat 2 includes an upper base 11 and a lower base 12, the upper base 11 and the lower base 12 are set on the top gun body 1, the boss 7 is arranged on the upper base 11, the lower base 12 and the upper base 11 are fixedly connected by stainless steel bolts 13.

The gland 8 is connected to the upper base 11, the gland 8 is connected to the upper base 11 through a plurality of stainless steel bolts 13, the upper base 11 is connected to the gas source through the connecting air pipe 14, and the connecting air pipe 14 is provided with a self-operated pressure reducing valve 15 , Air holes 16 are set on the steel ring 5 . The self-operated decompression valve 15 added on the connecting gas pipe of the gas source ensures that the gas pressure entering the sealing ring 3 is kept at 0.15MPa stably.

The sealing ring 3, the steel ring 5, the gland 8, and the upper base 11 are arranged as a structure that fits closely together. Such a structure ensures that the sealing ring forms a sealed cavity when it is working, which helps The sealing ring bulges, and the sealing ring 3 is provided with two concave portions 17 bent inward. The recessed portion 17 ensures that the steel ring is reliably positioned in the groove 4 of the sealing ring, ensuring reliable operation of the sealing ring.

The sealing device used in the RH refining furnace top gun described in the utility model, when in use, the rubber sealing ring is lifted by the air pressure of the air source, and when the top gun body is wrapped, the concave friction groove on the side of the steel ring and The friction between the anti-slip groove and the sealing ring increases the friction strength of the end face between the sealing ring, the sealing seat and the gland, enhances the sealing performance and expansion effect of the sealing ring, wraps the top gun tightly, and reduces the vacuum chamber top gun hole leakage, which improves the vacuum degree of the RH furnace; at the same time, the sealing device of the utility model makes the positioning of the sealing ring reliable, ensuring that the sealing seat and the sealing ring are fixed tightly during the working process of the top gun, and the sealing ring will not be flushed when it bulges. out of the sealing seat, and can be reliably restored to its original position after pressure relief, and the sealing ring will not be damaged when the top gun is raised and lowered, ensuring that the vacuum degree reaches the standard, improving the production quality of silicon steel, and the failure rate of the top gun is greatly reduced, so that the vacuum degree can be stabilized at the target Within the value range, the production of silicon steel is guaranteed, and the cost is effectively reduced.

The sealing device used in the RH refining furnace top gun described in the utility model, when in use, the rubber sealing ring is lifted by the air pressure of the air source, and when the top gun body is wrapped, the concave friction groove on the side of the steel ring and The friction between the anti-slip groove and the sealing ring increases the friction strength of the end face between the sealing ring, the sealing seat and the gland, enhances the sealing performance and expansion effect of the sealing ring, wraps the top gun tightly, and reduces the vacuum chamber top gun hole leakage, which improves the vacuum degree of the RH furnace; at the same time, the sealing device of the utility model makes the positioning of the sealing ring reliable, ensuring that the sealing seat and the sealing ring are fixed tightly during the working process of the top gun, and the sealing ring will not be flushed when it bulges. out of the sealing seat, and can be reliably restored to its original position after pressure relief, and the sealing ring will not be damaged when the top gun is raised and lowered, ensuring that the vacuum degree reaches the standard, improving the production quality of silicon steel, and the failure rate of the top gun is greatly reduced, so that the vacuum degree can be stabilized at the target Within the value range, the production of silicon steel is guaranteed, and the cost is effectively reduced.

Before adopting the RH refining furnace top gun described in the utility model, 1, according to the need to replace 2 sealing rings for each group of electrical steel production, the average monthly production of 20 groups of electrical steel is calculated, and 40 need to be replaced every month; after improvement, On average, 1 rubber concave sealing ring is replaced every 3 groups. Based on the monthly production of 20 groups of electrical steel, 7 groups need to be replaced every month. Calculated on the basis of 66.5 yuan for each rubber concave sealing ring, the cost of spare parts can be saved throughout the year: (40-7) pieces/month*12 months*66.5 yuan/piece=26334 yuan/year; 2. Each time the expansion sealing ring needs to be replaced The time is about 15 minutes. Calculated by reducing the number of replacement parts (40-7) per month * December = 396 pieces per year, the production time can be saved by 15 minutes / piece * 396 pieces = 5940 minutes. 50% of the saved time is used for production. If the furnace steel production is calculated for 45 minutes, then the electrical steel can be produced 5940min*50%/45min*120t/furnace=7920t more each year. If the profit per ton of steel is 100 yuan, the annual benefit can be increased by 7920t*100 yuan/t=792,000 yuan; 3. Due to the damage of the expansion sealing ring, the vacuum degree is not up to standard, which leads to unplanned interruption of pouring in the production of electrical steel. Calculated on the average of 5 accidents per year, each unplanned interruption of pouring will cause about 10 losses in molten steel return, tundish scrapping, and energy consumption. 10,000 yuan, the annual accident loss costs can be reduced: 100,000 yuan/accident*5 accidents/year=500,000 yuan/year. Comprehensive calculation, the annual benefit can be increased: 2.6334+79.2+50=1.318 million yuan.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various improvements of the method concept and technical solutions of the utility model are adopted, or without Improvements that directly apply the ideas and technical solutions of the utility model to other occasions are within the protection scope of the utility model.

Claims (6)

1. a sealing device for RH refining furnace top gun, said sealing device is sleeved on the top gun body (1), it is characterized in that: said sealing device comprises sealing ring (3), sealing seat (2 ), the sealing ring (3) is installed on the sealing seat (2), the groove (4) is set on the sealing ring (3), the steel ring (5) is installed in the groove (4), and the sealing seat (2) is set on the top Gun body (1) outer surface, steel ring (5) and sealing ring (3) are all sleeved on the top gun body (1), and steel ring (5) and sealing ring (3) are set to be positioned at sealing seat (2) and At the position between the top gun bodies (1), recessed friction grooves (6) are arranged on the side of the steel ring (5). 2. The sealing device for RH refining furnace top gun according to claim 1, characterized in that: the sealing seat (2) is a ring structure, and the lower end of the sealing seat (2) is provided with an outwardly protruding boss (7), the lower end surface of the sealing ring (3) leans against the boss (7), the inner surface of the sealing ring (3) is attached to the top gun body (1), and the sealing device also includes a gland (8) , the gland (8) is set on the top gun body (1). 3. The sealing device for RH refining furnace top gun according to claim 2, characterized in that: the gland (8) is against the sealing seat (2) and the side surface (9) of the sealing ring, so that A plurality of anti-slip grooves (10) are provided on the side surface of the gland (8) abutting against the side surface (9) of the sealing ring. 4. The sealing device for RH refining furnace top gun according to claim 3, characterized in that: said sealing seat (2) comprises an upper base (11) and a lower base (12), and the upper base (11) and the lower base (12) are set on the top gun body (1), the boss (7) is arranged on the upper base (11), and the stainless steel bolts are passed between the lower base (12) and the upper base (11) (13) Fixed connection. 5. The sealing device for RH refining furnace top gun according to claim 4, characterized in that: the gland (8) is connected with the upper base (11), and the gland (8) is connected with the upper base (11) ) are connected by a plurality of stainless steel bolts (13), the upper base (11) is connected with the gas source through the connecting air pipe (14), and the self-operated pressure reducing valve (15) is set on the connecting air pipe (14), and the steel ring (5 ) is provided with stomata (16). 6. The sealing device for RH refining furnace top gun according to claim 5, characterized in that: said sealing ring (3) and steel ring (5), gland (8), upper base (11) The structure is arranged as a close fit together, and two inwardly bent recessed parts (17) are arranged on the sealing ring (3).