Blast furnace top pressure equalizing valve with steam channel

Abstract

The utility model relates to a blast furnace top pressure equalizing valve with a steam channel, and belongs to the technical field of blast furnace equipment in the metallurgical industry. According to the technical scheme, a valve body (1) is of a three-way structure, a valve plate (2) is of a disc-shaped structure, one end of the valve plate (2) is a conical surface, and an annular groove is formed in the conical surface and used for installing a sealing rubber ring (5); the valve seat (6) is of an annular structure, sealing grooves are formed in the upper end face and the lower end face of the valve seat (6) and used for installing the sealing rings (8), a U-shaped groove is formed in the outer side of the valve seat (6), and the flat steel (9) wraps the outer side of the U-shaped groove of the valve seat (6) to form a steam channel (7). The upper part of the pup joint (12) is connected with the valve body (1) through a bolt, and the lower part of the pup joint (12) is connected with a pressure equalizing pipeline. The pressure equalizing valve has the advantages that the heat efficiency of steam can be effectively utilized, the problem that the pressure equalizing valve cannot normally act due to the fact that the valve plate and the valve seat are frozen in winter is thoroughly solved, and equipment faults are reduced.

Description

Technical Field

[0001] The utility model relates to a blast furnace top equalizing pressure valve with a steam channel, belonging to the technical field of blast furnace equipment in the metallurgical industry. Background Art

[0002] The function of the equalizing valve on the top of a blast furnace is to equalize the pressure of the feed tank. By charging the tank with pressure, the pressure in the tank is slightly greater than the pressure inside the furnace, ensuring that the material can be smoothly poured into the furnace. Two equalizing valves are designed on the top of the blast furnace, and the working system is one open and one standby. The working medium used by the equalizing valve is blast furnace gas. The blast furnace gas produces condensed water due to the low temperature in winter and accumulates on the valve seat inside the valve. If the valve is closed for a long time in winter, the temperature is too low and the valve plate and the valve seat will freeze together, causing the valve to be unable to open normally and lose the normal function of the standby valve. The conventional method is to install an external steam heating pipe on the outside of the valve seat to transfer heat to the valve seat through thermal radiation to avoid the outer valve plate and the valve seat from freezing together as much as possible. However, when the outdoor temperature is below -15°C, there are still cases where the valve plate freezes and the valve cannot be opened or closed. Therefore, a pressure-equalizing valve seat with its own steam channel was studied. By connecting to steam, the problem that the pressure-equalizing valve cannot operate normally in winter due to the freezing of the valve plate and valve seat can be completely solved, reducing equipment failures and ensuring the normal production of the blast furnace. Utility Model Content

[0003] The purpose of the utility model is to provide a blast furnace top equalizing pressure valve with its own steam channel, which can effectively utilize the thermal efficiency of steam, completely solve the problem that the equalizing pressure valve cannot operate normally due to the freezing of the valve plate and the valve seat in winter, reduce equipment failures, and solve the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A blast furnace top equalizing pressure valve with a built-in steam channel comprises a valve body, a valve plate, a sealing rubber ring, a valve seat, a steam channel, a sealing ring, a flat steel and a short circuit, wherein the valve body is a three-way structure, the valve plate is a disc-shaped structure, one end of the valve plate is a conical surface, and an annular groove is provided on the conical surface for installing the sealing rubber ring; the valve seat is a circular ring structure, and sealing grooves are provided on the upper and lower end faces of the valve seat for installing the sealing ring, a through-body U-shaped groove is provided on the outer side of the valve seat, and flat steel is wrapped around the outer side of the U-shaped groove of the valve seat to form a steam channel; the upper part of the short circuit is connected to the valve body by bolts, and the lower part of the short circuit is connected to the pressure equalizing pipe.

[0006] The upper inner portion of the valve seat is a conical surface, which matches the conical surface of the valve plate.

[0007] The flat steel is provided with two holes, one hole is connected to the steam inlet pipe, and the other hole is connected to the steam outlet pipe.

[0008] A pressing ring is arranged on the sealing rubber ring.

[0009] The pressure ring is matched with the annular groove on the valve plate.

[0010] The beneficial effects of the utility model are as follows: the valve seat is provided with a steam channel. After steam is introduced in winter, self-heating of the valve seat body is realized. Compared with external steam tracing, the thermal efficiency of steam can be utilized more effectively, and the problem that the equalizing valve cannot operate normally due to freezing of the valve plate and the valve seat in winter is completely solved, equipment failures are reduced, and normal production of the blast furnace is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front view of the utility model;

[0012] Figure 2 is the sectional view of the utility model;

[0013] Figure 3 is Figure 2 the partial enlarged view at I in

[0014] Figure 4 is the sectional view of the valve seat of the utility model;

[0015] In the figure: valve body 1, valve plate 2, bolt 3, pressure ring 4, sealing rubber ring 5, valve seat 6, steam channel 7, sealing ring 8, flat steel 9, steam inlet pipe 10, steam outlet pipe 11, short joint 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further illustrates the utility model with reference to the accompanying drawings by way of examples.

[0017] Referring to the attached Figures 1-4 , a blast furnace top equalizing valve with a self-contained steam channel includes a valve body 1, a valve plate 2, a sealing rubber ring 5, a valve seat 6, a steam channel 7, a sealing ring 8, a flat steel 9, and a short joint 12. The valve body 1 is of a three-way structure, the valve plate 2 is of a disc-shaped structure, one end of the valve plate 2 is a conical surface, and an annular groove is formed on the conical surface for installing the sealing rubber ring 5; the valve seat 6 is of an annular structure, sealing grooves are formed on the upper and lower end faces of the valve seat 6 for installing the sealing ring 8, a through-body U-shaped groove is formed on the outside of the valve seat 6, and the flat steel 9 is wrapped outside the U-shaped groove of the valve seat 6 to form the steam channel 7; the upper part of the short joint 12 is connected to the valve body 1 by bolts, and the lower part of the short joint 12 is connected to the equalizing pipeline.

[0018] In this embodiment, referring to the attached Figures 1-4, the valve body 1 is a three-way structure, the valve plate 2 is a disc-shaped structure, one end is a conical surface, and an annular groove is opened on the conical surface for installing the sealing rubber ring 5. The pressing ring 4 cooperates with the annular groove on the valve plate 2 to fix the sealing rubber ring 5. The valve seat 6 is a circular ring structure. Sealing grooves are opened on the upper and lower end faces of the valve seat 6 for installing the sealing ring 8. The upper part inside the valve seat 6 is a conical surface, which cooperates with the conical surface of the valve plate 2. A through-body U-shaped groove is opened on the outside of the valve seat 6. The flat steel 9 is welded and wrapped on the outside of the U-shaped groove of the valve seat 6 to form the steam channel 7. The steam inlet pipe 10 and the steam outlet pipe 11 are welded and connected to the two holes of the flat steel 9. The upper part of the short pipe 12 is connected to the valve body 1 through bolts, and the lower part is connected to the pressure equalizing pipeline. The specification of the flat steel 9 is 20*1.1, and the nominal diameters of the steam inlet pipe 10 and the steam outlet pipe 11 are 20 mm.

[0019] The steam inlet pipe 10 and the steam outlet pipe 11 are connected to the steam pipe network. The steam enters the steam channel 7 of the valve seat 6 and transfers heat to the valve seat through thermal radiation, completely solving the problem that the pressure equalizing valve cannot operate normally due to the freezing of the valve plate and the valve seat in winter, reducing equipment failures, and ensuring the normal production of the blast furnace.

Claims

1. A top-pressure equalizing valve for a blast furnace with a built-in steam channel, characterized in that: It includes a valve body (1), a valve plate (2), a sealing rubber ring (5), a valve seat (6), a steam passage (7), a sealing ring (8), a flat steel (9) and a stub (12). The valve body (1) is of a three-way structure, and the valve plate (2) is of a disc-shaped structure. One end of the valve plate (2) is a conical surface, and an annular groove is formed on the conical surface for installing the sealing rubber ring (5); the valve seat (6) is of a circular ring structure, and sealing grooves are formed on the upper and lower end faces of the valve seat (6) for installing the sealing ring (8). A through-body U-shaped groove is opened on the outside of the valve seat (6), and the flat steel (9) is wrapped outside the U-shaped groove of the valve seat (6) to form the steam passage (7); the upper part of the stub (12) is connected to the valve body (1) by bolts, and the lower part of the stub (12) is connected to the pressure equalizing pipeline.

2. The equalizing valve for the blast furnace top with a built-in steam channel according to claim 1, wherein: The upper part of the inner side of the valve seat (6) is a conical surface, which is matched with the conical surface of the valve plate (2).

3. The equalizing valve for the blast furnace top with a built-in steam channel according to claim 1, characterized in that: Two holes are provided on the flat steel (9), one hole is connected to the steam inlet pipe (10), and the other hole is connected to the steam outlet pipe (11).

4. A top-pressure equalizing valve for a blast furnace with a built-in steam channel according to claim 1, characterized in that: A retaining ring (4) is provided on the sealing rubber ring (5).

5. The equalizing valve for the blast furnace top with a self - contained steam passage according to claim 4, characterized in that: The retaining ring (4) is matched with the annular groove on the valve plate (2).

Images