Circulating gas adjusting device of stainless steel smelting vacuum furnace

Abstract

The utility model relates to the technical field of stainless steel smelting, in particular to a circulating gas adjusting device of a stainless steel smelting vacuum furnace, which comprises a gas injection channel, a power structure and an exhaust structure, the gas injection channel comprises a base ring, a plurality of inclined pipes are arranged on the side surface of the base ring at equal angles in a penetrating manner, and the outer ends of the plurality of inclined pipes are communicated with a ring pipe; one side of the annular pipe communicates with a first gas conveying pipe; the balance adjusting structure comprises an air pressure tank, and the lower edge of one side of the air pressure tank communicates with a first air conveying pipe. And the exhaust structure is communicated with the power structure. According to the utility model, when air in the furnace is cleaned, multi-point and multi-direction air injection can be realized, the air can be quickly, relatively and uniformly contacted and mixed with the air in the furnace, and the air is extruded out of the furnace from the exhaust structure, so that the air cleaning work is realized, and when stainless steel smelting is carried out, the air exhausted by the inclined pipe is recycled by the exhaust structure to form circulating air; molten steel circulation is driven to optimize the circulation and treatment process of the molten steel, so that the quality and smelting efficiency of the molten steel are improved.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel smelting technology, specifically to a circulating gas regulating device for a vacuum furnace in stainless steel smelting. Background Technology

[0002] The circulating gas regulating device for a vacuum furnace in stainless steel smelting is a device used to control and regulate the circulating gas during the stainless steel smelting process. Its main function is to optimize the circulation and treatment of molten steel to improve the quality of molten steel and smelting efficiency. The ladle is lifted by a hydraulic system to submerge the immersion tube of the vacuum tank with molten steel. Then, the vacuum exhaust system is started to form an internal and external pressure difference, and gas is blown in through the gas pipeline to drive the circulation of molten steel.

[0003] Currently, most exhaust methods involve using a vacuum pump to draw air from the furnace. After the air is drawn out, inert gas is injected through a gas supply structure to form a circulating gas. Exhausting and injecting gas are achieved by two separate structures. Furthermore, relying solely on suction can only create a relatively vacuum environment, and some air will inevitably remain inside the furnace. The oxygen, carbon dioxide, and other components in the residual air will mix into the molten steel, inevitably affecting the smelting effect. Utility Model Content

[0004] The purpose of this invention is to provide a circulating gas regulating device for a vacuum furnace in stainless steel smelting, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A circulating gas regulating device for a stainless steel smelting vacuum furnace, comprising:

[0007] The gas injection channel includes a base ring, and several inclined tubes are arranged and interspersed at equal angles on the side surface of the base ring. The outer ends of the several inclined tubes are connected to the ring tube, and a No. 1 gas delivery pipe is connected to one side of the ring tube.

[0008] A balance adjustment structure, the balance adjustment structure including a pressure tank, the lower edge of one side of the pressure tank being connected to a No. 1 gas supply pipe;

[0009] A power structure, which is connected to a pressure tank;

[0010] An exhaust structure, which is interconnected with the power structure.

[0011] Furthermore, a one-way valve is fixedly connected to one end of the first gas pipeline.

[0012] Furthermore, the balance adjustment structure also includes:

[0013] The limiting support columns are arranged in a ring at equal angles and fixedly installed on the lower edge of the inner wall of the pressure tank.

[0014] Piston plate, which is slidably sleeved inside the pressure tank;

[0015] A limiting guide rod is fixedly installed on the upper edge of the piston plate in a ring-shaped arrangement at equal angles, and the upper end of the limiting guide rod slides through the upper edge of the pressure tank;

[0016] A compression spring, which is sleeved on the side surface of the limiting guide rod;

[0017] A spring base plate is slidably sleeved inside the upper end of the pressure tank. The edge of the spring base plate is slidably sleeved with the limiting guide rod, and the bottom side of the spring base plate abuts against the upper end of the pressure spring.

[0018] Furthermore, the balance adjustment structure also includes:

[0019] An internally threaded pipe is rotatably mounted on the upper middle part of the pressure tank;

[0020] A lead screw, which is screwed into an internally threaded tube, and the lower end of the lead screw is fixedly connected to a spring base plate;

[0021] An adjustment handle is fixedly installed on the upper end of the internally threaded pipe;

[0022] The No. 2 gas supply pipe is fixedly installed on the bottom side of the pressure tank, and the No. 2 one-way valve is fixedly installed in the middle section of the No. 2 gas supply pipe.

[0023] Furthermore, the power structure includes:

[0024] The pump head is connected to the No. 2 gas pipeline on one side.

[0025] The motor, the output end of which is fixedly connected to the internal blades of the pump head;

[0026] A three-way valve, one end of which is fixedly connected to the pump head;

[0027] An electric valve, wherein the electric valve is embedded in the middle of a three-way valve;

[0028] An external pipe port is fixedly installed at one end of a three-way valve;

[0029] Gas pipe No. 3 is connected to the other end of the three-way valve.

[0030] Furthermore, the exhaust structure includes:

[0031] The exhaust pipe is connected to one end of the No. 3 gas transmission pipe on one side.

[0032] The mounting flange is fixedly fitted onto the lower opening of the exhaust pipe port;

[0033] A sliding groove is intersecting and formed on both sides of the upper surface of the exhaust pipe port;

[0034] An air outlet is interposed in the middle of the upper surface of the exhaust pipe.

[0035] A slider, wherein the slider is slidably engaged with a slide groove;

[0036] A handle is rotatably mounted on the edge of the upper surface of the exhaust pipe port, and the bottom side of the handle is fixedly connected to the slider;

[0037] A connecting plate is rotatably mounted inside the exhaust pipe port, and the upper side of the connecting plate is fixedly connected to the slider;

[0038] An air vent is provided, which is intersected and opened in the middle of the connecting plate.

[0039] Furthermore, a sealing plate is fixedly installed on the bottom edge of the connecting plate, and an elastic soft pad is fixedly installed on the surface of the sealing plate adjacent to the inner wall of the exhaust pipe.

[0040] Compared with the prior art, the beneficial effects of this utility model are:

[0041] 1. The openings of each inclined tube are inserted into the vacuum furnace through the base ring. The exhaust structure is fixedly installed on the top of the vacuum furnace. The smelting gas is introduced into the ring tube from the No. 1 gas supply pipe. After being split, it is introduced into the vacuum furnace from each inclined tube at an angle, forming a flowing cyclone. When cleaning the air in the furnace, the multi-point and multi-directional gas injection can quickly and relatively evenly contact and mix with the air in the furnace, and squeeze the air in the furnace. The air is then squeezed out of the furnace from the exhaust structure, thus achieving the air cleaning work. When smelting stainless steel, the gas discharged from the inclined tube is recovered by the exhaust structure to form a circulating gas, which drives the molten steel circulation and optimizes the circulation and treatment process of the molten steel to improve the quality of the molten steel and the smelting efficiency. The swirling airflow can also drive the molten steel to flow and circulate in a swirling manner, improving the smelting effect.

[0042] 2. During exhaust, align the exhaust vent and the exhaust port. Seal the connection between the No. 3 gas supply pipe and the exhaust pipe with the sealing plate, so that the air inside the vacuum furnace is discharged from the exhaust port and the exhaust vent. After the air inside the furnace is exhausted, rotate the connecting plate by turning the handle to make the exhaust port and the exhaust vent separate and seal each other. Turn the sealing plate to open one end of the No. 3 gas supply pipe, and use the No. 3 gas supply pipe to connect the furnace space and the three-way valve, connect the circulation channel, and realize gas circulation. Attached Figure Description

[0043] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0044] Figure 2 This is a schematic diagram of the gas injection channel in this utility model;

[0045] Figure 3 This is a schematic diagram of the balance adjustment structure in this utility model;

[0046] Figure 4 This is a schematic diagram of the power structure in this utility model;

[0047] Figure 5 This is a schematic diagram of the exhaust structure in this utility model;

[0048] Figure 6 This is a schematic diagram of the exhaust structure in this utility model;

[0049] Figure 7 This is a schematic diagram of the exhaust structure in this utility model.

[0050] In the diagram: 1. Injection channel; 101. Base ring; 102. Inclined tube; 103. Ring tube; 104. No. 1 gas supply pipe; 105. No. 1 one-way valve; 2. Balance adjustment structure; 201. Pressure tank; 202. Limiting support column; 203. Piston plate; 204. Limiting guide rod; 205. Pressure spring; 206. Spring base plate; 207. Internally threaded tube; 208. Lead screw; 209. Adjusting handle; 210. No. 2 gas supply pipe; 211. 2. One-way valve; 3. Power structure; 301. Pump head; 302. Motor; 303. Three-way valve; 304. Electric valve; 305. External pipe inlet; 306. No. 3 gas supply pipe; 4. Exhaust structure; 401. Exhaust pipe inlet; 402. Mounting flange; 403. Slide groove; 404. Gas outlet; 405. Slider; 406. Handle; 407. Connecting plate; 408. Gas outlet hole; 409. Sealing plate; 410. Elastic pad. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0052] Please see Figure 1-7In this embodiment of the present invention, a circulating gas regulating device for a stainless steel smelting vacuum furnace includes an injection channel 1, a balance regulating structure 2, a power structure 3, and an exhaust structure 4. The injection channel 1 includes a base ring 101, and a plurality of inclined tubes 102 are arranged and interspersed at equal angles on the side surface of the base ring 101. The outer ends of the plurality of inclined tubes 102 are interconnected with the ring pipe 103, and a first gas supply pipe 104 is connected to one side of the ring pipe 103. The balance regulating structure 2 includes a pressure tank 201, and the lower edge of one side of the pressure tank 201 is interconnected with the first gas supply pipe 104. The power structure 3 is interconnected with the pressure tank 201. The exhaust structure 4 is interconnected with the power structure 3.

[0053] Specifically, the inclined tubes 102 are inserted into the vacuum furnace through the base ring 101, and the exhaust structure 4 is fixedly installed on the top of the vacuum furnace. The smelting gas is introduced into the ring pipe 103 through the first gas supply pipe 104. After being split, it is introduced into the vacuum furnace through each inclined tube 102 at an inclined position, forming a flowing cyclone. When cleaning the air in the furnace, the multi-point and multi-directional gas injection can quickly and relatively evenly contact and mix with the air in the furnace, and squeeze the air in the furnace. The air is then squeezed out of the furnace from the exhaust structure 4, realizing the air cleaning work. When smelting stainless steel, the gas discharged from the inclined tubes 102 is recycled by the exhaust structure 4 to form a circulating gas, which drives the molten steel circulation and optimizes the circulation and treatment process of the molten steel to improve the quality of the molten steel and the smelting efficiency. The swirling airflow can also drive the molten steel to flow and circulate in a swirling manner, improving the smelting effect.

[0054] Example 1

[0055] like Figure 4 As shown, in this embodiment, one end of the first gas supply pipe 104 is fixedly connected to a first one-way valve 105; the power structure 3 includes a pump head 301, a motor 302, a three-way valve 303, an electric valve 304, an external pipe port 305, and a third gas supply pipe 306. One side of the pump head 301 is connected to the second gas supply pipe 210; the output end of the motor 302 is fixedly connected to the internal blades of the pump head 301; one end of the three-way valve 303 is fixedly connected to the pump head 301; the electric valve 304 is embedded in the middle of the three-way valve 303; the external pipe port 305 is fixedly installed at one end of the three-way valve 303; and the third gas supply pipe 306 is connected to the other end of the three-way valve 303.

[0056] In this embodiment, the motor 302 drives the blades inside the pump head 301 to rotate, and the gas supply structure is connected from the external pipe port 305. The gas is introduced into the pressure tank 201 through the second gas supply pipe 210 and then injected into the ring pipe 103 through the first gas supply pipe 104 to perform the gas injection operation. After the air in the furnace is squeezed out, the electric valve 304 changes the direction of the three-way valve 303 channel to stop the gas supply from the external pipe port 305, which mainly drives the air inside the pipeline to form a circulating gas.

[0057] like Figure 5-7 As shown, in this embodiment, the exhaust structure 4 includes an exhaust port 401, a mounting flange 402, a sliding groove 403, an air outlet 404, a slider 405, a handle 406, a connecting plate 407, and an air outlet hole 408. One side of the exhaust port 401 is connected to one end of the No. 3 air supply pipe 306. The mounting flange 402 is fixedly sleeved at the lower opening of the exhaust port 401. The sliding groove 403 is inserted into both sides of the upper surface of the exhaust port 401. The air outlet 404 is inserted into the middle of the upper surface of the exhaust port 401. The slider 405 is slidably engaged with the groove 403; the handle 406 is rotatably installed on the upper edge of the exhaust port 401, and the bottom side of the handle 406 is fixedly connected to the slider 405; the connecting plate 407 is rotatably installed on the inner top of the exhaust port 401, and the upper side of the connecting plate 407 is fixedly connected to the slider 405; the exhaust hole 408 is inserted into the middle of the connecting plate 407; a sealing plate 409 is fixedly installed on the bottom edge of the connecting plate 407, and an elastic soft pad 410 is fixedly installed on the adjacent surface of the sealing plate 409 and the inner wall of the exhaust port 401.

[0058] In practice, during exhaust, the exhaust port 408 and the exhaust outlet 404 are aligned with each other. The connection between the No. 3 gas supply pipe 306 and the exhaust pipe 401 is blocked by the sealing plate 409, so that the air inside the vacuum furnace is discharged from the exhaust outlet 404 and the exhaust port 408. After the air inside the furnace is exhausted, the connecting plate 407 is rotated by the handle 406 to make the exhaust outlet 404 and the exhaust port 408 separate and block each other. The sealing plate 409 is then rotated to open one end of the No. 3 gas supply pipe 306. The No. 3 gas supply pipe 306 is used to connect the furnace space and the three-way valve 303, connecting the circulation channel and realizing gas circulation.

[0059] Example 2

[0060] Based on Example 1, in order to supplement the pressure regulation method in the entire circulating gas regulation structure that was not mentioned in Example 1.

[0061] like Figure 3As shown, in this embodiment, the balance adjustment structure 2 further includes a limiting support column 202, a piston plate 203, a limiting guide rod 204, a pressure spring 205, a spring base plate 206, an internally threaded pipe 207, a lead screw 208, an adjustment handle 209, and a second gas supply pipe 210. The limiting support column 202 is fixedly installed on the lower edge of the inner wall of the pressure tank 201 in a ring-shaped, equidistant arrangement. The piston plate 203 is slidably sleeved inside the pressure tank 201. The limiting guide rod 204 is fixedly installed on the upper edge of the piston plate 203 in a ring-shaped, equidistant arrangement, with the upper end of the limiting guide rod 204 sliding through the upper edge of the pressure tank 201. The pressure spring 205 is sleeved on the limiting support column 202, a piston plate 203, a limiting guide rod 204, a pressure guide rod 205, a spring base plate 206, a spring plate 207, a threaded pipe 208, an adjustment handle 209, and a second gas supply pipe 210. The side surface of the guide rod 204; the spring base plate 206 is slidably sleeved inside the upper end of the pressure tank 201, the edge of the spring base plate 206 is slidably sleeved with the guide rod 204, and the bottom side of the spring base plate 206 abuts against the upper end of the pressure spring 205; the internal threaded tube 207 is rotatably installed in the middle of the upper side of the pressure tank 201; the lead screw 208 is screwed into the internal threaded tube 207, and the lower end of the lead screw 208 is fixedly connected to the spring base plate 206; the adjusting handle 209 is fixedly installed in the upper end of the internal threaded tube 207; the second gas supply pipe 210 is fixedly installed in the bottom side of the pressure tank 201, and the second one-way valve 211 is fixedly installed in the middle section of the second gas supply pipe 210.

[0062] In practice, gas enters the pressure tank 201 from the bottom and enters the first gas supply pipe 104 from one side of the pressure tank 201. The pressure spring 205 provides elastic support to the piston plate 203, and the piston plate 203 elastically compresses the gas inside the pressure tank 201 to balance the airflow. At the same time, the internal threaded pipe 207 can be rotated by adjusting the handle 209, which in turn moves the lead screw 208, controlling the lead screw 208 to move up and down and driving the spring base plate 206 to move down. This increases the elastic strength of the pressure spring 205 by pre-pressing it, thereby adjusting the balanced air pressure range.

[0063] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A circulating gas regulating device for a stainless steel smelting vacuum furnace, characterized in that, include: Gas injection channel (1), the gas injection channel (1) includes a base ring (101), a number of inclined tubes (102) are arranged and interspersed at equal angles on the side surface of the base ring (101), the outer ends of the number of inclined tubes (102) are connected to the ring tube (103), and a gas supply pipe (104) is connected to one side of the ring tube (103); The balance adjustment structure (2) includes a pressure tank (201), and the lower edge of one side of the pressure tank (201) is connected to the first gas transmission pipe (104); The power structure (3) is interconnected with the pressure tank (201); The exhaust structure (4) is interconnected with the power structure (3).

2. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 1, characterized in that, One end of the No. 1 gas transmission pipe (104) is fixedly connected to a No. 1 one-way valve (105).

3. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 2, characterized in that, The balance adjustment structure (2) also includes: Limiting support column (202), the limiting support column (202) is arranged in a ring at equal angles and fixedly installed on the lower edge of the inner wall of the pressure tank (201); Piston plate (203), which is slidably sleeved inside pressure tank (201); The limiting guide rod (204) is fixedly installed on the upper edge of the piston plate (203) in a ring-shaped arrangement at equal angles. The upper end of the limiting guide rod (204) slides through the upper edge of the pressure tank (201). A compression spring (205) is sleeved on the side surface of the limiting guide rod (204); Spring base plate (206) is slidably sleeved inside the upper end of the pressure tank (201). The edge of the spring base plate (206) is slidably sleeved with the limiting guide rod (204). The bottom side of the spring base plate (206) abuts against the upper end of the pressure spring (205).

4. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 3, characterized in that, The balance adjustment structure (2) also includes: An internally threaded tube (207) is rotatably mounted on the upper middle part of a pressure tank (201); A lead screw (208) is screwed into an internally threaded tube (207), and the lower end of the lead screw (208) is fixedly connected to a spring base plate (206). Adjustment handle (209), which is fixedly installed on the upper end of the internal threaded tube (207); The second gas supply pipe (210) is fixedly installed on the bottom side of the pressure tank (201), and a second one-way valve (211) is fixedly installed in the middle section of the second gas supply pipe (210).

5. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 4, characterized in that, The power structure (3) includes: Pump head (301), one side of which is connected to the second gas supply pipe (210); Motor (302), the output end of which is fixedly connected to the blade inside the pump head (301); A three-way valve (303) is fixedly connected at one end to a pump head (301); An electric valve (304) is embedded in the middle of a three-way valve (303); An external pipe port (305) is fixedly installed at one end of a three-way valve (303); The No. 3 gas supply pipe (306) is connected to the other end of the three-way valve (303).

6. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 5, characterized in that, The exhaust structure (4) includes: An exhaust pipe (401) is connected to one end of the No. 3 gas transmission pipe (306) on one side. Mounting flange (402), which is fixedly sleeved at the lower opening of exhaust pipe port (401); The groove (403) is intersected and opened on both sides of the upper surface of the exhaust pipe port (401); An air outlet (404) is provided, which is inserted into the middle of the upper surface of the exhaust pipe (401); A slider (405) is slidably engaged with a groove (403); A handle (406) is rotatably mounted on the edge of the upper surface of the exhaust port (401), and the bottom side of the handle (406) is fixedly connected to the slider (405). A connecting plate (407) is rotatably mounted on the top of the exhaust pipe port (401), and the upper side of the connecting plate (407) is fixedly connected to the slider (405); An air vent (408) is provided, which is inserted into the middle of the connecting plate (407).

7. The circulating gas regulating device for a stainless steel smelting vacuum furnace according to claim 6, characterized in that, A sealing plate (409) is fixedly installed on the bottom edge of the connecting plate (407), and an elastic pad (410) is fixedly installed on the adjacent surface of the sealing plate (409) and the inner wall of the exhaust pipe (401).

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