Sleeve-in-sleeve type tuyere small sleeve with built-in valve sleeve

Abstract

The invention relates to the technical field of blast furnace equipment, in particular to a sleeve-in-sleeve type tuyere small sleeve with a built-in valve sleeve, which comprises a small sleeve body, the front end of the small sleeve body is provided with an inner cooling chamber and an outer cooling chamber, and the rear end of the small sleeve body is provided with a public water inlet chamber and a public water return chamber; and each cooling chamber is communicated with the public water inlet chamber and the public water return chamber through a built-in valve. The public water inlet chamber and the public water return chamber are additionally arranged at the rear end of the small sleeve body, the public water inlet chamber and the public water return chamber are arranged at the positions connected with the middle sleeve, water exists in the public water inlet chamber and the public water return chamber for a long time, and the cooling effect of the rear end of the small sleeve cannot be affected due to the fact that the front end of the small sleeve body is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace equipment, and in particular to a small sleeve-in-sleeve type tuyere with a built-in valve sleeve. Background Art

[0002] The tuyere sleeve of the blast furnace, as a vital component of the blast furnace structure, is installed in the furnace wall between the furnace belly and the furnace, and partially extends into the furnace. Its main function is to transport high-temperature hot air and coal powder exceeding 1100℃ to the inside of the blast furnace to ensure that the high temperature requirements during the smelting process are met. Since the front end of the tuyere sleeve directly extends into the blast furnace, the tuyere sleeve is directly subjected to the erosion of liquid slag and high-temperature materials in the furnace during operation, which leads to extremely fast wear of the tuyere sleeve, especially when the furnace condition is unstable or the slag skin falls off, the tuyere sleeve is damaged more frequently, especially once the tuyere sleeve leaks and is not discovered in time, it is easy to cause major safety accidents such as tuyere burn-through and blast furnace explosion; and once the tuyere sleeve leaks and is damaged, it needs to be replaced in time, and this process requires the blast furnace to be shut down for maintenance. Such a shutdown operation will undoubtedly affect the production efficiency of the blast furnace, leading to an increase in fuel consumption, thereby increasing the smelting cost and causing economic losses. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a small tuyere sleeve with a built-in valve sleeve, which prolongs the service life of the small tuyere sleeve and thus reduces the number of blast furnace shutdown times.

[0004] To achieve this technical purpose, the present invention adopts the following scheme: A small sleeve of a sleeve-in-sleeve type air inlet with a built-in valve comprises a small sleeve body. The front end of the small sleeve body is provided with two inner and outer cooling chambers, and the rear end of the small sleeve body is provided with a public water inlet chamber and a public water return chamber. Each cooling chamber is connected with the public water inlet chamber and the public water return chamber through a built-in valve.

[0005] Compared with the prior art, the present invention has the following beneficial effects: The present invention adds a common water inlet chamber and a common water return chamber at the rear end of the small sleeve body, and the common water inlet chamber and the common water return chamber are placed at a position connected to the middle sleeve. There is water in the common water inlet chamber and the common water return chamber for a long time, and the cooling effect of the rear end of the small sleeve will not be affected by damage to the front end of the small sleeve body; the on-off of each cooling chamber and the flow rate of the coolant are controlled by the built-in valve, and after the tuyere small sleeve is found to be leaking, the valve of the corresponding cooling chamber can be closed in time, while the other cooling chamber can work normally, and the blast furnace production will not be affected.

[0006] Further, the preferred embodiment adopted by the present invention is: Each cooling chamber is respectively provided with a water inlet and a water return port. Each cooling chamber is respectively communicated with a common water inlet chamber through the water inlet, and each cooling chamber is respectively communicated with a common water return chamber through the water return port.

[0007] The valve is placed inside the public water inlet chamber and the public water return chamber, and the valve is set one-to-one with the water inlet and water return of each cooling chamber. The valve is used to control the on-off and flow rate of the water inlet and water return of each cooling chamber.

[0008] A guide channel is arranged inside each cooling chamber, and the cooling water entering each cooling chamber flows along the guide channel inside the cooling chamber.

[0009] The interior of each cooling chamber is provided with guide walls at intervals and in a staggered manner, and the gaps between adjacent guide walls form guide channels.

[0010] The valve includes a cylinder and a stop-type valve stem. The cylinder is placed inside a common water inlet chamber or a common water return chamber. A plurality of water permeable holes are opened on the side wall of the cylinder. The inside of the cylinder is connected with the common water inlet chamber or the common water return chamber through the water permeable holes. A stop-type valve core is slidably connected inside the cylinder. One end of the stop-type valve stem is placed outside the small sleeve body, and the other end penetrates the small sleeve body into the common water inlet chamber or the common water return chamber where it is located and is connected with the stop-type valve core inside the cylinder.

[0011] The stop valve stem is connected to the small sleeve body by thread or sliding seal.

[0012] The valve comprises a cylinder, a rotary valve stem and a rotary valve core. The cylinder is placed inside a common water inlet chamber or a common water return chamber, and a plurality of water permeable holes are symmetrically provided on the side wall of the cylinder. The rotary valve stem is placed in the middle of the cylinder, and the two ends of the rotary valve stem are rotatably connected to the inner wall of the common water inlet chamber or the common water return chamber respectively. Two rotary valve cores with fan-shaped cross-sections are provided on the rotary valve stem, and the rotary valve cores are symmetrically arranged. The gap between the two rotary valve cores is a water groove, and the water groove is connected to the common water inlet chamber or the common water return chamber through the water permeable holes.

[0013] An adjustment groove is provided on the rod head of the rotary valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the water circulation in the jacket cooling chamber; Figure 3 This is a schematic diagram of the water circulation in the inner jacket cooling chamber; Figure 4 It is a structural schematic diagram of a valve core stop type valve; Figure 5 It is a structural schematic diagram of a valve core rotary type valve; Figure 6 for Figure 5 Schematic diagram of the mid-rotation valve core; The markings in the figure are: 1. Inner sleeve; 2. Partition; 3. Outer sleeve; 4. Cooling chamber; 5. Water inlet; 6. Water return; 7. Public water inlet chamber; 8. Public water return chamber; 9. Main water inlet; 10. Main water return; 11. Guide wall one; 12. Guide wall two; 13. Valve; 1301. Cylinder; 1302. Water permeable hole; 1303. Stop-type valve core; 1304. Stop-type valve stem; 1305. Rotary valve stem; 1306. Rotary valve core; 1307. Adjustment groove; 14. Rotary valve core water groove. DETAILED DESCRIPTION

[0015] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0016] A small air inlet sleeve with a built-in valve sleeve, such as Figures 1 to 4 As shown, it includes a small sleeve body, which consists of an annular inner sleeve 1, a partition 2 and an outer sleeve 3. The partition 2 is mounted on the outside of the inner sleeve 1, and the outer sleeve 3 is mounted on the outside of the partition 2. The front and rear ends of the inner sleeve 1, the partition 2 and the outer sleeve 3 are respectively sealed and welded. The inner sleeve 1 and the partition 2, the partition 2 and the outer sleeve 3 form an inner and outer double-layer structure. The gaps between the inner sleeve 1 and the partition 2, and between the partition 2 and the outer sleeve 3 form independent cooling chambers 4, and the rear end of each cooling chamber 4 is respectively provided with a water inlet 5 and a water return port 6.

[0017] A common water inlet chamber 7 and a common water return chamber 8 are respectively provided at the rear end of the small sleeve body; a total water inlet 9 is opened at the position of the common water inlet chamber 7 at the rear end of the small sleeve body, and a total water return port 10 is opened at the position of the common water return chamber 8 at the rear end of the small sleeve body; the common water inlet chamber 7 is arranged corresponding to the water inlet ends of the two cooling chambers 4 and is connected with the corresponding cooling chamber 4 through the water inlet 5 of each cooling chamber 4; the common water return chamber 8 is arranged corresponding to the water return ends of the two cooling chambers 4 and is connected with the corresponding cooling chamber 4 through the water return port 6 of each cooling chamber 4.

[0018] A guide wall is arranged inside each cooling chamber 4, and the guide wall consists of a guide wall 11 and a guide wall 2 12. The guide wall 11 and the guide wall 2 12 are arranged alternately between the two inner walls of the cooling chamber 4, and the gap between the guide wall 11 and the guide wall 2 12 forms a guide channel, and the cooling water flows along the guide channel.

[0019] Cooling water circulation path: The cooling water first enters the common water inlet chamber 7 through the main water inlet 9, and enters the inner and outer cooling chambers 4 respectively through the water inlet 5 arranged in each cooling chamber 4, flows along the guide channel in each cooling chamber 4, enters the common water return chamber 8 through each water return port 6, and is finally discharged through the main water return port 10.

[0020] Valves 13 are installed inside the common water inlet chamber 7 and the common water return chamber 8 corresponding to the water inlet 5 and the water return port 6 of each cooling chamber 4, respectively. The valves 13 are used to control the on-off and flow rate of the water inlet and return of each cooling chamber.

[0021] The valve can be in various forms, and the valve structure can be: the valve 13 is composed of a cylinder 1301 and a stop-type valve stem 1304, the cylinder 1301 is placed inside the public water inlet chamber 7 or the public return water chamber 8 where it is located, and a number of water-permeable holes 1302 are evenly opened circumferentially on the side wall of the cylinder 1301, and a stop-type valve core 1303 is slidably connected to the inside of the cylinder 1301, and the outer diameter of the stop-type valve core 1303 is matched with the inner wall clearance of the cylinder 1301; one end of the stop-type valve stem 1304 is placed outside the small sleeve body, and the other end passes through the end of the small sleeve body, enters the public water inlet chamber 7 or the public return water chamber 8 where it is located, and extends into the cylinder 1301 and is fixedly connected to the rear end of the stop-type valve core 1303.

[0022] The stop valve stem 1304 of each valve 13 is a threaded rod, and a threaded hole adapted to the stop valve stem 1304 is provided at the position corresponding to each stop valve stem 1304 at the rear end of the small sleeve body. The stop valve stem 1304 is threadedly connected to the rear end of the small sleeve body through the threaded hole. By cooperating with the stop valve stem 1304 and the threaded hole, the stop valve stem 1304 is rotated to adjust the length thereof extending out of the small sleeve body, thereby adjusting the position of the stop valve core 1303 inside the cylinder 1301, thereby adjusting the on-off and flow rate of the valve 13.

[0023] The stop valve stem can also be a smooth round stem, and a matching smooth round hole is provided at the rear end of the small sleeve body corresponding to the position of the stop valve stem 1304, and the stop valve stem is slidably and sealingly connected to the smooth round hole.

[0024] The stop valve core 1303 is placed at the front end of the common water inlet chamber 7 or the common water return chamber 8, at which time the valve 13 is closed, and the stop valve core 1303 is placed at the rear end of the common water inlet chamber 7 or the common water return chamber 8, at which time the water volume is maximum.

[0025] The valve structure can also be a rotary valve, the specific structure is as follows Figure 5 , Figure 6As shown, the valve 13 is composed of a cylinder 1301, a rotary valve stem 1305 and a rotary valve core 1306. Water holes 1302 are respectively opened on both sides of the cylinder 1301. The water holes 1302 on both sides are symmetrically arranged, and several rows of water holes 1302 on each side are arranged at intervals, and several holes are arranged in each row.

[0026] The rotary valve stem 1305 is disposed in the middle of the cylinder 1301 and both ends of the rotary valve stem 1305 are rotatably connected to the inner wall of the common water inlet chamber 7 or the common water return chamber 8 where the rotary valve stem 1305 is located.

[0027] The rotary valve stem 1305 is axially installed with two rotary valve cores 1306 with fan-shaped cross-sections, and the rotary valve cores 1306 are symmetrically arranged. The gap between the rotary valve cores 1306 is the water groove 14. The rotary valve stem 1305 is rotated. When the rotary valve stem 1305 is rotated to make the rotary valve core 1306 rotate to the area with the water permeable hole 1302, the rotary valve core 1306 blocks the water permeable hole 1302 and the valve is closed; when the water groove 14 rotates to the area with the water permeable hole 1302, the water inlet 5 (return water port 6) is connected with the water permeable hole 1302 through the water groove 14, thereby connecting the cooling chamber 4 with the common water inlet chamber 7 (common water return chamber 8).

[0028] The head of the rotary valve stem 1305 is provided with an inner hexagonal adjusting groove 1307 that cooperates with a hexagonal wrench. The rotary valve stem 1305 can be rotated by cooperating with the hexagonal wrench and the adjusting groove 1307, which is convenient and quick.

[0029] On the basis of the original small sleeve body structure, the present invention adds a public water chamber (including a public water inlet chamber and a public water return chamber) at the rear end of the small sleeve body. The public water chamber is located at the position where the small sleeve is connected to the middle sleeve. There is water in the public water chamber for a long time, and the cooling effect of the rear end of the small sleeve will not be affected by damage to the front end of the small sleeve body; a built-in valve 13 is added to the water inlet 5 and the water return port 6 of each cooling chamber 4, which can reasonably distribute the water flow of the two layers of cooling chambers 4 and independently control the on and off of the cooling water flow entering the two cooling chambers. When it is found that the tuyere small sleeve is leaking, it is necessary to close the valve of the corresponding leaking cooling chamber in time (the valve can be completely closed or not completely closed according to the leakage situation and working experience), and the remaining other set of cooling chambers can still work normally, so the tuyere small sleeve can still be used normally and will not affect the blast furnace operation.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A small sleeve of a sleeve-in-sleeve type tuyere with a built-in valve, comprising a small sleeve body, characterized in that: The front end of the small sleeve body is provided with two inner and outer cooling chambers, and the rear end of the small sleeve body is provided with a public water inlet chamber and a public water return chamber. Each cooling chamber is connected with the public water inlet chamber and the public water return chamber through a built-in valve.

2. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 1, characterized in that: Each cooling chamber is respectively provided with a water inlet and a water return port. Each cooling chamber is respectively communicated with a common water inlet chamber through the water inlet, and each cooling chamber is respectively communicated with a common water return chamber through the water return port.

3. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 2, characterized in that: The valve is placed inside the public water inlet chamber and the public water return chamber, and the valve is set one-to-one with the water inlet and water return of each cooling chamber. The valve is used to control the on-off and flow rate of the water inlet and water return of each cooling chamber.

4. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 3, characterized in that: A guide channel is arranged inside each cooling chamber, and the cooling water entering each cooling chamber flows along the guide channel inside the cooling chamber.

5. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 4, characterized in that: The interior of each cooling chamber is provided with guide walls at intervals and in a staggered manner, and the gaps between adjacent guide walls form guide channels.

6. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 1, characterized in that: The valve includes a cylinder and a stop-type valve stem. The cylinder is placed inside a common water inlet chamber or a common water return chamber. A plurality of water permeable holes are opened on the side wall of the cylinder. The inside of the cylinder is connected with the common water inlet chamber or the common water return chamber through the water permeable holes. A stop-type valve core is slidably connected inside the cylinder. One end of the stop-type valve stem is placed outside the small sleeve body, and the other end penetrates the small sleeve body into the common water inlet chamber or the common water return chamber where it is located and is connected with the stop-type valve core inside the cylinder.

7. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 6, characterized in that: The stop valve stem is connected to the small sleeve body by thread or sliding seal.

8. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 1, characterized in that: The valve comprises a cylinder, a rotary valve stem and a rotary valve core. The cylinder is placed inside a common water inlet chamber or a common water return chamber, and a plurality of water permeable holes are symmetrically provided on the side wall of the cylinder. The rotary valve stem is placed in the middle of the cylinder, and the two ends of the rotary valve stem are rotatably connected to the inner wall of the common water inlet chamber or the common water return chamber respectively. Two rotary valve cores with fan-shaped cross-sections are provided on the rotary valve stem, and the rotary valve cores are symmetrically arranged. The gap between the two rotary valve cores is a water groove, and the water groove is connected to the common water inlet chamber or the common water return chamber through the water permeable holes.

9. The small sleeve of sleeve-in-sleeve type tuyere with built-in valve according to claim 8, characterized in that: An adjustment groove is provided on the rod head of the rotary valve stem.

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