Blast furnace double-marble valve device

Abstract

The utility model belongs to the technical field of blast furnace equipment, particularly relates to a double-marble valve device of a blast furnace, and aims to solve the problem that the safety production of the blast furnace and the personal safety of operators are endangered due to the fact that the danger of gun insertion and gun pulling operation provided by the background technology is obviously improved. A second marble valve is arranged at one end of the first marble valve, and supporting pipes are installed on the inner wall of the first marble valve and the inner wall of the second marble valve. When the coal injection gun is pulled out of the first marble valve, the first one-way valve plate can be quickly closed, so that when the coal injection gun is pulled out of the second marble valve, coal gas and high-temperature particles cannot be sprayed out, safety accidents are avoided, scalding is prevented, air leakage can be effectively prevented by utilizing the one-way passing effect of the one-way valve plate, and the blast furnace is shut down. Due to the design of the double-marble valve, the length of the sleeve of the coal injection gun is increased, high-pressure pulverized coal is effectively prevented from abrading the tuyere, the times of replacing the marble valves are reduced, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace equipment, in particular to a double-ball valve device for a blast furnace. Background Art

[0002] The coal injection gun is one of the key equipment of the blast furnace. It is made of heat-resistant seamless steel pipes and blows high-pressure coal powder into the furnace to increase production and reduce coke ratio. A large amount of coal injection is required to ensure the stable and smooth operation of the blast furnace. Since the coal powder contains a lot of debris, it is very easy to clog the coal injection gun. In addition, the water content of coal powder is high, especially on rainy days. When it is greater than 2%, the fluidity of coal powder becomes poor, the coal powder is easy to agglomerate, and it is easy to clog the coal injection gun.

[0003] The traditional method for online replacement of coal injection guns is: when inserting the gun, first put the pressure cap on the gun body of the coal injection gun, then insert the outlet end of the coal injection gun into the clamp seat of the ball valve, press it against the one-way valve plate of the ball valve, and rely on manpower to push the coal injection gun to open the one-way valve plate, and then tighten the pressure cap after the coal injection gun passes through the ball valve and enters the gun insertion hole channel of the direct blowing pipe; when pulling out the gun, first loosen the positioning bolt, withdraw the pressure cap, and blow out the coal injection gun by relying on the pressure in the blast furnace, or pull it out manually; when blowing out or pulling out the coal injection gun, the one-way valve plate of the ball valve will automatically lock the hot air and seal it.

[0004] The above method makes the online replacement of coal injection guns full of dangers. This is because when the coal injection gun pushes open the one-way valve plate, the hot air in the furnace will be ejected at high speed from the gap of the ball valve. It is necessary to work quickly against the hot air. Not only must the workers endure the harsh whistling of the high-speed hot air, but there is also the possibility that the workers will be burned by the hot air. Similarly, when the gun is pulled out, the above adverse conditions will also occur. The danger of inserting and pulling out the gun is significantly increased, which will endanger the safe production of the blast furnace and the personal safety of the workers. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a double-ball valve device for a blast furnace, which overcomes the deficiencies of the prior art and effectively solves the problem that the danger of inserting and removing guns is significantly increased, which will endanger the safe production of the blast furnace and the personal safety of operators.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A double-ball valve device for a blast furnace comprises a first ball valve, a second ball valve is arranged at one end of the first ball valve, and a trustee is installed on the inner walls of the first ball valve and the second ball valve, wherein the outer wall of one end of the trustee is located inside the first ball valve and is hinged with a second one-way valve plate, and the outer wall of one end of the other trustee is located inside the second ball valve and is hinged with the first one-way valve plate, and the inner wall of the other trustee is slidably connected to a coal injection gun.

[0008] Preferably, the first ball valve and the second ball valve have the same structure, and the first ball valve and the second ball valve are connected in series.

[0009] Preferably, the inner wall of the other tube is provided with a pressure cap, and the inner walls of the tube and the top of the pressure cap are screwed with positioning bolts.

[0010] Preferably, the outer wall of the other end of one of the first ball valves is connected to a flange, and the first ball valve is connected to the furnace body through the flange.

[0011] Preferably, the outer wall on one side of the flange is screwed with fastening bolts distributed at equal distances, and the flange is fixedly connected to the outer wall on one side of the furnace body by the fastening bolts.

[0012] Preferably, the first one-way valve plate and the second one-way valve plate are both tightly attached to an outer wall of one side of the hosting tube.

[0013] Preferably, the inner diameter of the tube matches the outer diameter of the coal injection gun.

[0014] The beneficial effects of the utility model are:

[0015] 1. The double-ball valve device for blast furnace designed in this invention can quickly close the first check valve plate when the coal injection gun pulls out the first ball valve, so that the coal injection gun cannot spray out coal gas and high-temperature particles when the second ball valve is pulled out, thus avoiding safety accidents and scalding.

[0016] 2. In the double-ball valve device for blast furnace of the present invention, two first check valve plates and second check valve plates are added inside the first ball valve and the second ball valve. The one-way passing effect of the check valve plates can effectively prevent air leakage, thus achieving the advantage of blast furnace shutdown;

[0017] 3. The double-ball valve device of the blast furnace designed in this invention lengthens the sleeve length of the coal injection gun, which can effectively reduce the vibration of the coal injection gun during injection, thereby avoiding the deviation of the injection angle caused by the vibration of the coal injection gun, and effectively preventing the high-pressure coal powder from wearing out the tuyere;

[0018] 4. The double ball valve device of the blast furnace designed in this invention effectively ensures the reliability of online replacement of coal injection guns, solves the problem of wind stoppage caused by loose ball valves when replacing coal injection guns in production, eliminates potential safety hazards, reduces the number of ball valve replacements, and saves energy and reduces consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic plan view of the working state of a blast furnace double-ball valve device proposed by the utility model;

[0020] Figure 2 It is a plane schematic diagram of a coal injection gun of a blast furnace double-ball valve device proposed by the utility model when the first ball valve is pulled out;

[0021] Figure 3 The utility model is a plan view of a coal injection gun of a blast furnace double-ball valve device when two ball valves are pulled out.

[0022] In the figure: 1. first ball valve; 2. second ball valve; 21. first one-way valve plate; 22. positioning bolt; 23. pressure cap; 3. tube; 4. coal injection gun; 5. furnace body; 11. flange; 12. fastening bolt; 13. second one-way valve plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment 1, refer to Figure 1-2 A double-ball valve device for a blast furnace includes a first ball valve 1, a second ball valve 2 is arranged at one end of the first ball valve 1, and a trustee 3 is installed on the inner walls of the first ball valve 1 and the second ball valve 2, wherein the outer wall of one end of the trustee 3 is located inside the first ball valve 1 and is hinged with a second one-way valve plate 13, and the outer wall of one end of the trustee 3 is located inside the second ball valve 2 and is hinged with a first one-way valve plate 21.

[0025] In this embodiment, when the coal injection gun 4 is pulled out of the first ball valve 1, the first one-way valve plate 21 can be quickly closed, so that the coal injection gun 4 cannot spray out gas and high-temperature particles when the second ball valve 2 is pulled out, thereby avoiding safety accidents and preventing burns. Two first one-way valve plates 21 and second one-way valve plates 13 are added inside the first ball valve 1 and the second ball valve 2. The one-way passage effect of the one-way valve plate can effectively prevent air leakage, thereby achieving the advantage of blast furnace shutdown.

[0026] Example 2, refer to Figure 1 , a double-ball valve device for a blast furnace, the inner wall of the other tube 3 is slidably connected with a coal injection gun 4.

[0027] In this embodiment, the design of the double ball valve lengthens the sleeve length of the coal injection gun 4, which can effectively reduce the vibration generated by the coal injection gun 4 during injection, thereby avoiding the deviation of the injection angle caused by the vibration of the coal injection gun 4, and effectively preventing the high-pressure coal powder from wearing the air outlet, effectively ensuring the reliability of online replacement of the coal injection gun 4, and solving the problem of air stoppage caused by the loose ball valve when replacing the coal injection gun 4 in production, eliminating potential safety hazards, and reducing the number of times the ball valve is replaced, thereby saving energy and reducing consumption.

[0028] Reference Figure 1 The first ball valve 1 and the second ball valve 2 have the same structure, and the first ball valve 1 and the second ball valve 2 are connected in series.

[0029] Reference Figure 2 A pressure cap 23 is provided on the inner wall of the other tube 3, and positioning bolts 22 are screwed on the inner walls of the tops of the tube 3 and the pressure cap 23.

[0030] Reference Figure 1-2 The outer wall of the other end of one of the first ball valves 1 is connected to a flange 11, and the first ball valve 1 is connected to the furnace body 5 through the flange 11. The outer wall of one side of the flange 11 is screwed with fastening bolts 12 distributed at equal distances, and the flange 11 is fixedly connected to the outer wall of one side of the furnace body 5 through the fastening bolts 12.

[0031] Reference Figure 3 The first one-way valve plate 21 and the second one-way valve plate 13 are both closely attached to the outer wall of one side of the tube 3 .

[0032] Reference Figure 1 , the inner diameter of the tube 3 matches the outer diameter of the coal injection gun 4.

[0033] Working principle: The device is composed of a first ball valve 1, a second ball valve 2, a tube 3, a coal injection gun 4, and a furnace body 5. The first ball valve 1 and the second ball valve 2 are welded in series with each other. The first one-way valve plate 21 and the second one-way valve plate 13 can be automatically closed by their own weight and the pressure in the furnace. A positioning bolt 22 and a pressure cap 23 are arranged at the end of the tube 3 to limit the axial movement and circumferential rotation of the coal injection gun 4. The coal injection gun 4 is made of a heat-resistant seamless steel pipe, and the front end is a sharp angle. The coal injection gun 4 is inserted into the tube 3. The inner diameter of the tube 3 matches the outer diameter of the coal injection gun 4. The coal injection gun 4 will blow high-pressure coal powder into the furnace body 5.

[0034] When replacing the coal injection gun 4, while the first ball valve 1 is pulled out, the second one-way valve plate 13 is quickly and automatically closed by its own weight and the pressure in the furnace, so that the coal injection gun 4 cannot spray out gas and high-temperature particles when the second ball valve 2 is pulled out. When inserting the gun, first push open the first one-way valve plate 21 of the second ball valve 2 without any effort. At this time, a closed space is formed between the two ball valves. The coal injection gun 4 continues to push open the second one-way valve plate 13 of the first ball valve 1, and also cannot spray out gas and high-temperature particles.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blast furnace double-ball valve device, comprising a first ball valve (1), characterized in that: A second ball valve (2) is arranged at one end of the first ball valve (1), and a trustee (3) is installed on the inner walls of the first ball valve (1) and the second ball valve (2), wherein the outer wall of one end of the trustee (3) is located inside the first ball valve (1) and is hingedly connected to a second one-way valve plate (13), and the outer wall of one end of the other trustee (3) is located inside the second ball valve (2) and is hingedly connected to a first one-way valve plate (21), and the inner wall of the other trustee (3) is slidably connected to a coal injection gun (4).

2. A blast furnace double-ball valve device according to claim 1, characterized in that: The first ball valve (1) and the second ball valve (2) have the same structure, and the first ball valve (1) and the second ball valve (2) are connected in series.

3. A blast furnace double-ball valve device according to claim 1, characterized in that: The inner wall of the other tube (3) is provided with a pressure cap (23), and the inner walls of the tops of the tube (3) and the pressure cap (23) are screwed with positioning bolts (22).

4. A blast furnace double-ball valve device according to claim 1, characterized in that: The outer wall of the other end of one of the first ball valves (1) is connected to a flange (11), and the first ball valve (1) is connected to a furnace body (5) via the flange (11).

5. A blast furnace double-ball valve device according to claim 4, characterized in that: The outer wall of one side of the flange (11) is screwed with fastening bolts (12) distributed at equal distances, and the flange (11) is fixedly connected to the outer wall of one side of the furnace body (5) by the fastening bolts (12).

6. A blast furnace double-ball valve device according to claim 1, characterized in that: The first one-way valve plate (21) and the second one-way valve plate (13) are both tightly attached to an outer wall of one side of the tube holder (3).

7. A blast furnace double-ball valve device according to claim 1, characterized in that: The inner diameter of the tube (3) matches the outer diameter of the coal injection gun (4).

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