Protection screen water cooling structure of submerged arc furnace

Abstract

The utility model relates to the technical field of submerged arc furnaces, in particular to a protection screen water cooling structure of a submerged arc furnace, which comprises a plurality of protection screens, a serial water path is arranged between every two adjacent protection screens for communication, a water inlet is arranged on at least one protection screen, and a water outlet is arranged on at least one protection screen to form a water flow channel; detachable pipe head structures are arranged at the water inlet and the water outlet, and each pipe head structure comprises a pipe seat and a pipe body; the pipe seat is communicated with the water flow channel through the pipe hole; the end of the pipe body is inserted into the pipe seat and matched with the plugging structure to achieve axial sealing of the pipe seat, and a plurality of water outlet holes distributed in the circumferential direction are formed in the end of the pipe body and used for conveying cooling water to the pipe hole. By optimizing and improving the water inlet and outlet structure of the protection screen, quick assembly and disassembly can be realized by adjusting the water inlet and outlet structure so as to facilitate overhaul and maintenance; and meanwhile, by adopting an axial sealing structure, a larger movable adjusting space of the pipe body can be realized, so that the mounting convenience is improved, and the stability and the reliability of the protection screen are favorably kept.

Description

Technical Field

[0001] The utility model relates to the technical field of submerged arc furnaces, and particularly relates to a water-cooling structure of a protection screen of a submerged arc furnace. Background Art

[0002] The existing protection screen of the submerged arc furnace works in a high-temperature environment (above 500°C). It is difficult to achieve quick disassembly of the water inlet and outlet interfaces and facilitate maintenance. Since the protection screen is a welded structure, the position accuracy of the water inlet and outlet is limited and can only be controlled within the range of ±2 mm. The protection screen of the original structure has poor compatibility, the installation holes are hidden and it is difficult to install visually, and water leakage accidents often occur.

[0003] Therefore, a more reasonable technical solution needs to be proposed to solve the technical problems existing in the prior art. Summary of the Utility Model

[0004] To overcome at least one of the above-mentioned defects, the utility model proposes a water-cooling structure of a protection screen of a submerged arc furnace. By adopting a reasonable structural method, the size compensation amount of the water pipe interface is increased, and the sealed connection structure is visualized, which can adapt to the high-temperature working environment and solve the problems of installation and sealing here.

[0005] To achieve the above purpose, the water-cooling structure of the protection screen disclosed by the utility model can adopt the following technical solutions:

[0006] A water-cooling structure of a protection screen of a submerged arc furnace includes a plurality of protection screens, and a series-connected waterway is arranged between adjacent protection screens for communication. At least one protection screen is provided with a water inlet and at least one protection screen is provided with a water outlet to form a water flow channel; detachable pipe head structures are arranged at the water inlet and the water outlet, and the pipe head structure includes a pipe seat and a pipe body; the pipe seat communicates with the water flow channel through a pipe hole; the end of the pipe body is inserted into the pipe seat and cooperates with a sealing structure to achieve axial sealing of the pipe seat, and a plurality of circumferentially distributed water outlet holes are formed at the end of the pipe body for delivering cooling water to the pipe hole.

[0007] For the above-disclosed water-cooling structure of the protection screen, external cooling water is introduced into the protection screen through the water inlet, and after flowing and cooling, it enters the next protection screen through the series-connected waterway for continuous cooling, and finally flows out from the water outlet. Since the pipe head structures at the water inlet and the water outlet adopt the axial butt joint sealing method, there is a certain adjustment space for the installation positions of the water inlet pipe and the water outlet pipe, which improves the installation convenience of the protection screen and is also more conducive to daily maintenance.

[0008] Further, in the present utility model, the pipe socket is used to connect the protection screen and the pipe body, to achieve the introduction of water flow and ensure the sealing effect; its structure can be constructed in various forms, and is not specifically limited to a single form. Here, an optimization is made and a feasible option is proposed: the pipe socket is provided with a connection channel for the pipe body to pass through, and the sealing structure includes a first sealing structure disposed at the first port of the connection channel and cooperating with the pipe body, and the sealing structure further includes a second sealing structure disposed at the second port of the connection channel and cooperating with the pipe body. When adopting such a solution, the pipe socket forms a longitudinal connection channel after being set, and the first sealing structure and the second sealing structure are respectively located at the upper port and the lower port of the connection channel.

[0009] Furthermore, there are various solutions to achieve sealing by setting a sealing structure at the port of the connection channel, and it is not specifically limited to a single form. Here, an optimization is made and a feasible option is proposed: the first port of the connection channel forms an inner concave cavity, and the first sealing structure includes a plug member. The plug member enters the inner concave cavity and is fixedly fitted in the inner concave cavity. The front end of the plug member and the inner bottom surface of the inner concave cavity are sealed by a first sealing ring. When adopting such a solution, the first sealing structure can be connected and fitted with the inner concave cavity by a threaded connection, and a first installation groove for accommodating the first sealing ring can be provided on the inner bottom surface of the inner concave cavity.

[0010] Further, the end of the pipe body is located at the sealing structure and is connected and fitted with the sealing structure, so as to achieve the fixation of the pipe body. The specific connection method can adopt various solutions, and it is not specifically limited to a single form. Here, an optimization is made and a feasible option is proposed: the end of the pipe body is formed with a connection head. The middle part of the connection head is connected and fitted with the plug member and remains fixed. The water outlet holes are distributed on the circumferential side of the connection head and open axially along the pipe body to achieve axial water outlet. When adopting such a solution, the connection head can be integrally formed with the pipe body. And in order to ensure the water flow rate, the end of the pipe body can be set as an enlarged structure. The middle part of the end face of the enlarged structure corresponds to the connection and sealing structure, and the edge of the end face of the enlarged structure forms the water outlet holes.

[0011] Further, in order to prevent the temperature of the sealing structure from rising and affecting the sealing effect, the sealing structure is cooled synchronously by cooling water. Specifically, it can be achieved through various solutions, and it is not specifically limited to a single form. Here, an optimization is made and a feasible option is proposed: an inner cavity communicating with the pipe hole is formed inside the plug member, and the water outlet holes are located in the inner cavity and discharge water towards the inner cavity. When adopting such a solution, the inner cavity of the plug member is an annular cavity, and the edge of the plug member extends to the bottom of the inner concave cavity of the pipe socket and presses against the first sealing ring.

[0012] Further, there are various options for the connection structure between the plug member and the pipe body, and it is not uniquely defined. Here, one feasible option is optimized and presented: docking holes are correspondingly formed at the end of the plug member and the pipe body, and the pipe body and the plug member are connected by a connecting screw at the docking holes. When adopting such a solution, the connecting screw can be a bolt, and the joint between the bolt and the plug member, and / or the joint between the pipe body and the plug member is sealed.

[0013] Further, a sealing structure is also provided at the second port of the pipe seat to maintain the sealing effect of the pipe seat. Specifically, it is not uniquely defined. Here, one feasible option is optimized and presented: the second sealing structure includes a second sealing ring provided at the second port, and the second sealing ring is fixed by a second sealing cover. When adopting such a solution, the second port can also be provided with a concave structure for accommodating the second sealing ring and the second sealing cover. The second sealing cover can be connected to the pipe seat by a threaded structure, or can be connected by a fastener structure or other fixing methods.

[0014] Further, the structure of the series-connected water path can be constructed in various forms, and the solution is not uniquely defined. Here, one feasible option is optimized and presented: the series-connected water path includes a bridging pipe connecting adjacent protection screens. Both ends of the bridging pipe extend into the protection screen respectively, and a series-connected pipe communicating with the bridging pipe is provided in the protection screen. When adopting such a solution, the bridging pipe can be constructed as a horizontal pipe, and the series-connected pipe can be constructed as a vertical pipe.

[0015] Further, the fixing method of the series-connected channel can adopt various structures. Here, one feasible option is optimized and presented: a fixing member for assisting in fixing the series-connected pipe is provided in the protection screen. When adopting such a solution, the fixing member includes a fixing frame.

[0016] Further, during the actual use process, the cooling water in the protection screen protects and cools the submerged arc furnace. The flow mode of the cooling water in the protection screen can adopt various structures, and it is not uniquely defined. Here, one feasible option is optimized and presented: a guiding flow channel is formed in the protection screen, and the guiding flow channel is used to guide the water flow into the protection screen and flow in the protection screen and flow through all the water-cooled area surfaces of the protection screen. When adopting such a solution, a partition is provided in the protection screen and a horizontal reciprocating guiding flow channel is formed by the partition, and the cooling water flows along the guiding flow channel and extends upward step by step to the series-connected water path.

[0017] Compared with the prior art, some beneficial effects of the disclosed technical solution of the present utility model include:

[0018] By optimizing and improving the water inlet and outlet structure of the protection screen, the utility model can achieve rapid installation and disassembly through the adjustment of the water inlet and outlet structure to facilitate maintenance; at the same time, the axially sealed structure can provide a larger movable adjustment space for the pipe body, thereby improving the convenience of installation and being beneficial to maintaining the stable reliability of the protection screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the protection screen provided on the submerged arc furnace.

[0021] Figure 2 It is a schematic top view of the protection screen provided on the submerged arc furnace.

[0022] Figure 3 is Figure 2 a cross-sectional view of the A-A section in

[0023] Figure 4 is Figure 3 a schematic enlarged view of the local structure at I in

[0024] Figure 5 is Figure 2 a cross-sectional view of the B-B section in

[0025] Figure 6 is Figure 5 a schematic enlarged view of the local structure at II in

[0026] In the above-mentioned drawings, the meanings of each label are as follows:

[0027] 1. Protection screen; 2. Series-connected waterway; 3. Pipe head structure; 301. Pipe seat; 302. Plugging member; 303. First sealing ring; 304. Second sealing ring; 305. Second sealing cover; 306. Pipe body; 307. Water outlet hole; 308. Connecting screw; 4. Bridging pipeline; 5. Series-connected pipeline; 6. Fixing member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will further explain the present utility model in combination with the drawings and specific embodiments.

[0029] Aiming at the situation in the prior art that the water-cooling structure of the protection screen of the submerged arc furnace is inconvenient to disassemble and assemble and has poor coordination and adjustability, the following embodiments are adjusted to overcome the defects existing in the prior art.

[0030] Embodiment

[0031] As Figure 1 、 Figure 2 shown, this embodiment provides a water-cooling structure for the protection screen 1 of a submerged arc furnace, including a plurality of protection screens 1, and a series-connected waterway 2 is arranged between adjacent protection screens 1 for connection. At least one protection screen 1 is provided with a water inlet and at least one protection screen 1 is provided with a water outlet to form a water flow channel; detachable pipe head structures 3 are arranged at both the water inlet and the water outlet. The pipe head structure 3 includes a pipe seat 301 and a pipe body 306; the pipe seat 301 is connected to the water flow channel through a pipe hole; the end of the pipe body 306 is inserted into the pipe seat 301 and cooperates with a sealing structure to achieve axial sealing of the pipe seat 301. A plurality of circumferentially distributed water outlet holes 307 are formed at the end of the pipe body 306 and are used to convey cooling water to the pipe hole.

[0032] For the water-cooling structure of the protection screen 1 provided in this embodiment, external cooling water is introduced into the protection screen 1 through the water inlet, and after flowing and cooling, it enters the next protection screen 1 through the series-connected waterway 2 for continuous cooling, and finally flows out from the water outlet. Since the pipe head structures 3 at the water inlet and the water outlet adopt an axially butted sealing method, there is a certain adjustment space for the installation positions of the inlet pipe and the outlet pipe, which improves the installation convenience of the protection screen 1 and is also more conducive to daily inspection and maintenance.

[0033] As Figure 3 、 Figure 4 shown, in this embodiment, the pipe seat 301 is used to connect the protection screen 1 and the pipe body 306 to realize the introduction of water flow and ensure the sealing effect; its structure can be constructed in various forms and is not specifically limited to a single one. This embodiment is optimized and one feasible option is adopted: the pipe seat 301 is provided with a connection channel for the pipe body 306 to pass through. The sealing structure includes a first sealing structure arranged at the first port of the connection channel and cooperating with the pipe body 306. The sealing structure also includes a second sealing structure arranged at the second port of the connection channel and cooperating with the pipe body 306. When adopting such a scheme, a longitudinal connection channel is formed after the pipe seat 301 is set, and the first sealing structure and the second sealing structure are respectively located at the upper port and the lower port of the connection channel.

[0034] There are various schemes for realizing sealing by arranging a sealing structure at the port of the connection channel, and it is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the first port of the connection channel forms an inner concave cavity. The first sealing structure includes a plug member 302. The plug member 302 enters the inner concave cavity and is fixed in the inner concave cavity in cooperation. The front end of the plug member 302 and the inner bottom surface of the inner concave cavity are sealed by a first sealing ring 303. When adopting such a scheme, the first sealing structure can be connected and cooperated with the inner concave cavity by threads, and the inner bottom surface of the inner concave cavity can be provided with a first installation groove for accommodating the first sealing ring 303.

[0035] The end of the pipe body 306 is located at the plugging structure and is connected and cooperated with the plugging structure, so as to realize the fixation of the pipe body 306. Specifically, various connection methods can be adopted, and it is not uniquely limited. In this embodiment, optimization is carried out and one feasible option is adopted: a connection head is formed at the end of the pipe body 306, and the middle part of the connection head is connected and cooperated with the plugging member 302 and remains fixed. The water outlet holes 307 are distributed on the circumferential side of the connection head and open axially along the axis of the pipe body 306 to realize axial water outlet. When adopting such a scheme, the connection head can be integrally formed with the pipe body 306, and in order to ensure the water flow rate, the end of the pipe body 306 can be set as an enlarged structure. The middle part of the end face of the enlarged structure corresponds to the connection of the plugging structure, and the edge of the end face of the enlarged structure forms the water outlet holes 307.

[0036] In order to prevent the plugging structure from affecting the sealing effect due to temperature rise, the plugging structure is cooled synchronously by cooling water. Specifically, it can be realized by various schemes, and it is not uniquely limited. In this embodiment, optimization is carried out and one feasible option is adopted: an inner cavity communicating with the pipe hole is formed inside the plugging member 302, and the water outlet holes 307 are located in the inner cavity and discharge water towards the inner cavity. When adopting such a scheme, the inner cavity of the plugging member 302 is an annular cavity, and the edge of the plugging member 302 extends to the bottom of the concave cavity of the pipe seat 301 and abuts against the first sealing ring 303.

[0037] The connection structure between the plugging member 302 and the pipe body 306 can adopt various schemes, and it is not uniquely limited. In this embodiment, optimization is carried out and one feasible option is adopted: docking holes are correspondingly formed at the ends of the plugging member 302 and the pipe body 306, and the pipe body 306 and the plugging member 302 are connected by cooperating with a connection screw 308 at the docking holes. When adopting such a scheme, the connection screw 308 can adopt a bolt member, and the joint between the bolt and the plugging member 302 and / or the joint between the pipe body 306 and the plugging member 302 are sealed.

[0038] A sealing structure is also arranged at the second port of the pipe seat 301 to maintain the sealing effect of the pipe seat 301. Specifically, it is not uniquely limited. In this embodiment, optimization is carried out and one feasible option is adopted: the second plugging structure includes a second sealing ring 304 arranged at the second port, and the second sealing ring 304 is fixed by a second sealing cover 305. When adopting such a scheme, the second port can also be provided with a concave structure for accommodating the second sealing ring 304 and the second sealing cover 305. The second sealing cover 305 can be connected with the pipe seat 301 by a threaded structure, or can be connected by a fastener structure or other fixing methods.

[0039] Such as Figure 5 、 Figure 6As shown in the figure, the structure of the series-connected waterway 2 can be constructed in various forms, and its solution is not uniquely limited. In this embodiment, it is optimized and one of the feasible options is adopted: the series-connected waterway 2 includes a bridging pipeline 4 that connects adjacent protection screens 1. Both ends of the bridging pipeline 4 extend into the protection screen 1 respectively, and a series-connected pipeline 5 that communicates with the bridging pipeline 4 is arranged in the protection screen 1. When adopting such a solution, the bridging pipeline 4 can be constructed as a horizontal pipeline, and the series-connected pipeline 5 can be constructed as a vertical pipeline.

[0040] The fixing method of the series-connected channel can adopt various structures. In this embodiment, it is optimized and one of the feasible options is adopted: a fixing member 6 for assisting in fixing the series-connected pipeline 5 is arranged in the protection screen 1. When adopting such a solution, the fixing member 6 includes a fixing frame.

[0041] During actual use, the cooling water in the protection screen 1 protects and cools the submerged arc furnace. The flow mode of the cooling water in the protection screen 1 can adopt various structures, which is not uniquely limited. In this embodiment, it is optimized and one of the feasible options is adopted: a guiding flow channel is formed in the protection screen 1, and the guiding flow channel is used to guide the water flow into the protection screen 1 and flow in the protection screen 1 and flow through all the water-cooled area surfaces of the protection screen 1. When adopting such a solution, a partition is arranged in the protection screen 1 and a horizontal reciprocating guiding flow channel is formed through the partition, and the cooling water flows along the guiding flow channel and extends upward step by step to the series-connected waterway 2.

[0042] When implemented according to the above solution, it has at least the following advantages compared with the prior art:

[0043] 1. The water outlets that fix the two protection screens are changed to the intermediate series-connected part, and the connection and installation are more convenient and flexible.

[0044] 2. There are gaps left in the circumferential direction between the inlet and outlet pipes of the protection screen and the pipe holes of the protection screen, and they can move left and right. During installation, due to the circumferential gaps that can be provided at the inlet and outlet water ports, only the intermediate series-connected part of the waterway needs to be adjusted and aligned.

[0045] 3. The sealing form is changed from radial sealing to axial sealing, and it is pressed tightly by the top thread, and the connection structure is more stable and reliable.

[0046] 4. The inlet and outlet water ports are made in the form of a lotus flower, which solves the problem of gas accumulation in the upper cavity and enables all the sealing rings to be effectively cooled in water.

[0047] The above are the implementation manners listed in this embodiment. However, this embodiment is not limited to the above optional implementation manners. Those skilled in the art can obtain many other implementation manners by arbitrarily combining the above manners. Anyone can obtain other various forms of implementation manners under the inspiration of this embodiment. The above specific implementation manners should not be construed as limiting the protection scope of this embodiment. The protection scope of this embodiment shall be defined by the claims.

Claims

1. A water-cooling structure for the protection screen of a submerged arc furnace, characterized in that: It includes a number of protection screens (1), and a series-connected waterway (2) is arranged between adjacent protection screens (1) for connection. An inlet is arranged on at least one protection screen (1) and an outlet is arranged on at least one protection screen (1) to form a water flow channel; detachable pipe head structures (3) are arranged at both the inlet and the outlet. The pipe head structure (3) includes a pipe seat (301) and a pipe body (306); the pipe seat (301) is communicated with the water flow channel through a pipe hole; the end of the pipe body (306) is inserted into the pipe seat (301) and a sealing structure is used to realize the axial sealing of the pipe seat (301). A number of circumferentially distributed water outlet holes (307) are formed at the end of the pipe body (306) and are used to convey cooling water to the pipe hole.

2. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 1, characterized in that: The pipe seat (301) is provided with a connection channel for the pipe body (306) to pass through. The sealing structure includes a first sealing structure arranged at the first port of the connection channel and cooperating with the pipe body (306). The sealing structure also includes a second sealing structure arranged at the second port of the connection channel and cooperating with the pipe body (306).

3. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 2, wherein: An inner concave cavity is formed at the first port of the connection channel. The first sealing structure includes a plug member (302). The plug member (302) enters the inner concave cavity and is fixedly fitted in the inner concave cavity. The front end of the plug member (302) is sealed with the inner bottom surface of the inner concave cavity through a first sealing ring (303).

4. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 3, characterized in that: A connection head is formed at the end of the pipe body (306). The middle part of the connection head is connected and cooperated with the plug member (302) to keep it fixed. The water outlet holes (307) are distributed on the circumferential side of the connection head and are axially opened along the axis of the pipe body (306) to realize axial water outlet.

5. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 4, wherein: An inner cavity communicating with the pipe hole is formed inside the plug member (302). The water outlet holes (307) are located in the inner cavity and discharge water towards the inner cavity.

6. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 4, wherein: The plug member (302) and the end of the pipe body (306) correspondingly form a docking hole. A connection screw (308) is used for cooperation at the docking hole to connect the pipe body (306) and the plug member (302).

7. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 2, wherein: The second sealing structure includes a second sealing ring (304) arranged at the second port. The second sealing ring (304) is fixed by a second sealing cover (305).

8. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 1, characterized in that: The series-connected waterway (2) includes a bridging pipe (4) connecting adjacent protection screens (1). Both ends of the bridging pipe (4) respectively extend into the protection screen (1), and a series-connected pipe (5) communicated with the bridging pipe (4) is arranged inside the protection screen (1).

9. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 8, wherein: Fixing members (6) for assisting in fixing the series-connected pipes (5) are arranged inside the protection screen (1).

10. The water-cooling structure of the protection screen of the submerged arc furnace according to claim 1, wherein: A guiding flow channel is formed inside the protection screen (1). The guiding flow channel is used to guide water flow into the protection screen (1) and flow inside the protection screen (1) and flow through all the water-cooled area surfaces of the protection screen (1).

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