Online hot blast valve rod sealing leakage treatment device
By combining an external short pipe, an internal short pipe gland, and a graphite packing structure, the problem of easy failure of the hot blast valve stem seal and air leakage was solved, and the hot blast valve was effectively sealed to ensure normal blast furnace production.
Patent Information
- Application Number
- CN202520051413.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-09
AI Technical Summary
The valve stem seal of the hot blast valve is prone to failure, leading to air leakage, which affects the normal production of the blast furnace. Existing technology requires shutting down the blast furnace for repairs, which is time-consuming and labor-intensive.
The system employs a combination of an external short connector, an internal short connector gland, and a graphite packing to form a stuffing box and gland. The graphite packing is pressed into close contact with the valve stem by fixing bolts, thereby reducing the sealing gap.
It effectively solves the problem of air leakage from the valve stem of the hot blast valve, ensuring normal production of the blast furnace, and eliminates the need for shutdown or blast reduction. It is simple to operate and convenient to construct.
Smart Images
Figure CN223563609U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hot -blast valve sealing technical field, especially in online hot -blast valve stem sealing leakage processing device. BACKGROUND
[0002] The hot blast valve of the hot blast furnace is necessary equipment in blast furnace smelting, is the hot blast control valve between blast furnace and hot blast furnace, opens in the air supply period, and all hot air (1100~1300 DEG C, 0.3~0.5MPa) is sent to blast furnace through hot blast valve. In the hot blast furnace combustion period, the hot blast valve is closed, and the side of the hot blast valve facing the hot blast furnace bears a great heat load. Since the hot blast valve is frequently opened and closed, the valve stem and the valve cover cooperation hole move frequently, and in addition, the valve working medium is high-temperature and high-pressure gas, and its sealing performance becomes one of important indexes for measuring the quality of the hot blast valve. Although the valve seat, valve plate and valve cover are water-cooled, the sealing of the hot blast valve stem becomes the weak link of the whole equipment, and air leakage caused by sealing failure occurs easily, in order to prevent the accident from being enlarged, the blast furnace needs to be handled, which not only wastes time and effort, but more importantly, seriously affects the normal production of the blast furnace. SUMMARY
[0003] In view of the above problems, the online hot blast valve stem sealing leakage processing device has the characteristics of simple structure, convenient construction and strong operability, and solves the problem of air leakage caused by easy failure of the sealing of the traditional air valve stem.
[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:
[0005] An online hot blast valve stem sealing leakage processing device, characterized by comprising an outer short connecting pipe, an inner short connecting gland, fixing bolts and graphite packing, the upper part of the hot blast valve is open, the original valve stem sealing is arranged on the valve stem in the hot blast valve, the valve stem is sleeved with a valve stem pressing column, and the valve stem pressing column is sleeved with the hot blast valve, the outer short connecting pipe is arranged on the valve stem pressing column, the graphite packing is arranged in the outer short connecting pipe, the inner short connecting gland is arranged on the outer short connecting pipe, and the inner short connecting gland is sleeved on the valve stem.
[0006] The outer short connecting pipe is connected with the inner short connecting gland through the fixing bolts, the outer short connecting pipe is composed of two semicircles, the inner short connecting gland is composed of two semicircles, and the graphite packing is in contact with the valve stem in the form of a plurality of "eight" shaped rings.
[0007] The utility model has the advantages of:
[0008] (1) The utility model discloses a filler box formed by the cooperation of two outer short connecting pipes is installed on the valve rod pressing bar of the sealing device, two inner short connecting pressing caps are formed by the cooperation of two inner short connecting pressing caps, the graphite packing is in the form of several "eight" shaped rings in the filler box, the pressing cap is installed above the filler box, the lower part of the pressing cap extends into the filler box, the graphite packing is extruded through the fixing bolt, the gap between the valve rod and the outside is reduced, the air leakage of the hot blast valve rod is solved, and the normal production of the blast furnace is effectively ensured without the need of blast furnace blowdown.
[0009] (2) The utility model discloses a filler box, pressing cap and valve rod center coincide, graphite packing is in several "eight" shaped ring and valve rod contact, further reduce the sealing gap of air valve rod, reduce the air leakage accident. DRAWINGS
[0010] Figure 1 It is the installation schematic view of the utility model,
[0011] Figure 2 It is the structure schematic view of the outer short connecting pipe of the utility model,
[0012] Figure 3 It is the structure schematic view of the inner short connecting pressing cap of the utility model.
[0013] Reference signs: outer short connecting pipe 1, inner short connecting pressing cap 2, fixing bolt 3, graphite packing 4, oil hole 5, original valve rod seal 6, valve rod pressing bar 7, hot blast valve 8, hot blast valve handle 9, valve rod 10. DETAILED DESCRIPTION
[0014] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model.
[0015] As shown in the figure, Figure 1 A kind of online hot blast valve rod sealing leakage processing device, including outer short connecting pipe 1, inner short connecting pressing cap 2, fixing bolt 3, graphite packing 4, hot blast valve 8 upper opening, original valve rod seal 6 is arranged on valve rod 10 in hot blast valve 8, hot blast valve 8 is sleeved with valve rod pressing bar 7, while valve rod pressing bar 7 is connected with hot blast valve 8, valve rod pressing bar 7 is provided with outer short connecting pipe 1, outer short connecting pipe 1 is connected on valve rod 10, outer short connecting pipe 1 is provided with graphite packing 4, outer short connecting pipe 1 is provided with inner short connecting pressing cap 2, inner short connecting pressing cap 2 is sleeved on valve rod 10.
[0016] As shown in the figure, Figure 1 , Figure 2 , Figure 3As shown, the outer short connecting pipe 1 is connected with the inner short connecting gland 2 through the fixing bolt 3, the outer short connecting pipe 1 is composed of two semicircles, the inner short connecting gland 2 is composed of two semicircles, and the graphite packing 4 is in the shape of several "eight" character circles and is in contact with the valve rod 10.
[0017] In use, the two outer short connecting pipes 1 are welded to form a packing box and are welded on the original sealing device valve rod pressing bar 7, the two inner short connecting glands 2 are welded to form a gland, the central part of the outer short connecting pipe and the inner short connecting gland is hollow, the graphite packing 4 is in the shape of several "eight" character circles and is located in the packing box, when the inner short connecting gland 2 is placed above the packing box, the lower part of the inner short connecting gland 2 extends into the packing box, the fixing bolt 3 is used to extrude the graphite packing 4, so that the graphite packing 4 is tightly connected with the valve rod 10, the sealing property of the hot blast valve valve rod 10 is strengthened, the graphite packing 4 is tightly connected with the valve rod 10 at all times when the hot blast valve is blowing and closing, the utility model has the advantages of simple structure, convenient construction and strong operability, after installation, the hot blast valve valve rod sealing air leakage condition can be effectively solved, and the blast furnace needs not to be blown down and reduced, the normal production of the blast furnace is effectively ensured.
[0018] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An online hot air valve stem sealing leakage treatment device, characterized in that: Includes an outer short pipe (1), an inner short pipe cover (2), a fixing bolt (3), and a graphite packing (4). The hot air valve (8) has an opening at the top. The original valve stem seal (6) is located on the valve stem (10) inside the hot air valve (8). A valve stem guard (7) is fitted on the hot air valve (8). At the same time, the valve stem guard (7) is fitted with the hot air valve (8). An outer short pipe (1) is set on the valve stem guard (7). The outer short pipe (1) is fitted on the valve stem (10). A graphite packing (4) is provided inside the outer short pipe (1). An inner short pipe cover (2) is set on the outer short pipe (1). The inner short pipe cover (2) is fitted on the valve stem (10).
2. The online hot air valve stem sealing leakage treatment device according to claim 1, characterized in that: The outer short pipe (1) is connected to the inner short pipe cover (2) by fixing bolts (3). The outer short pipe (1) is composed of two semicircles, and the inner short pipe cover (2) is composed of two semicircles. The graphite packing (4) is in contact with the valve stem (10) in several figure-eight rings.