Portable ladle hot charging drainage sand tool

Abstract

The utility model provides a portable ladle hot charging drainage sand tool, and the tool is composed of top funnel, pipeline handle, pipeline switch device, arc pipeline and bottom funnel; the top funnel is large upwards and small downwards, the bottom of top funnel is fixed and is connected with the top end of arc pipeline, and the one side of arc pipeline is fixedly provided with pipeline handle; the top of arc pipeline is installed with pipeline switch device, and the pipeline switch device is used for controlling the on-off opening and closing of drainage sand in arc pipeline; the bottom end of arc pipeline is fixedly connected with the bottom funnel which is small upwards and large downwards, and the bottom funnel is matched with the ladle nozzle of ladle. The utility model solves the drawbacks of the existing drainage sand filling mode, improves the efficiency of filling drainage sand in the ladle baking process, guarantees the safety of personnel, and ensures the smooth progress of molten steel pouring.

Description

Technical Field

[0001] This utility model belongs to the field of metal casting technology, specifically relating to a convenient steel ladle hot-filling sand-draining tool. Background Technology

[0002] In the steelmaking process, LF (Ladle Refining Furnace) and VD (Vacuum Degassing Furnace) refining are key processes, playing a crucial role in improving steel quality and meeting the performance requirements of different products. The timing and method of filling the ladle sprue directly affect the smoothness of the ladle nozzle and the stability of subsequent casting operations.

[0003] Currently, there are two common methods for filling LF and VD refining ladle priming sand in the industry, but both have obvious drawbacks.

[0004] One method involves filling the ladle with guiding sand before baking. During the ladle baking process, the pre-filled guiding sand covers the nozzle area, severely hindering heat transfer to the nozzle region, resulting in insufficient and ineffective heating of the nozzle. In the subsequent molten steel cooling stage, cold steel easily forms at this location, clogging the nozzle and significantly reducing the casting rate. This reduced casting rate not only disrupts the production rhythm and increases downtime but also wastes raw materials and energy, increasing production costs.

[0005] Another method involves filling the nozzle with guide sand before tapping. Since this guide sand is not baked at this stage, its surface is unsintered. During tapping, the high-temperature and high-speed steel flow strongly erodes the guide sand at the nozzle, gradually forming depressions on its surface. In subsequent refining processes, bottom argon blowing aims to promote full circulation of molten steel at the nozzle, achieving uniformity in steel composition and temperature. However, the depressions formed by the guide sand at the nozzle disrupt the normal circulation path of the molten steel, preventing effective circulation in that area. This leads to a drop in temperature, resulting in cold steel, which can also cause nozzle blockage, severely affecting the normal casting operation, reducing product quality, and causing economic losses to the company.

[0006] Furthermore, the traditional method of filling diversion sand into straight pipes requires operators to be in close contact with a high-temperature steel ladle, posing a serious safety risk of burns. It is also inconvenient to operate and affects filling efficiency. Therefore, the following improved technical solution is proposed. Utility Model Content

[0007] The technical problem solved by this utility model is to provide a convenient tool for hot-filling molten steel ladle sand, which solves the drawbacks of existing molten steel sand filling methods, improves the efficiency of filling molten steel sand during the ladle baking process, ensures personnel safety, and ensures the smooth pouring of molten steel.

[0008] The technical solution adopted in this utility model is as follows: a convenient tool for hot-filling sand drainage in a steel ladle, the tool consisting of a top funnel, a pipe handle, a pipe switch device, an arc-shaped pipe, and a bottom funnel. The bottom of the top funnel, which is wider at the top and narrower at the bottom, is fixedly connected to the top of the arc-shaped pipe, and the pipe handle is fixedly installed on one side of the arc-shaped pipe; the pipe switch device is installed on the top of the arc-shaped pipe, and the pipe switch device is used to control the opening and closing of the sand drainage in the arc-shaped pipe; the bottom of the arc-shaped pipe is fixedly connected to the bottom funnel, which is narrower at the top and wider at the bottom, and the bottom funnel is adapted to the ladle nozzle.

[0009] In the above technical solution, further: the pipeline switching device consists of a switch slot and a pull-out assembly; the outer wall of the switch slot is sealed and fixedly installed in a through-hole manner on the side wall of the arc-shaped pipeline; the inner wall of the switch slot is pulled out and fitted with the pull-out assembly; the pull-out assembly consists of an arc-shaped tongue plate, a square pull plate, and a pull plate handle; the arc-shaped tongue plate is used to open and close the fluid channel of the arc-shaped pipeline, and the arc-shaped tongue structure of the arc-shaped tongue plate fits snugly against the inner wall of the arc-shaped pipeline; the arc-shaped tongue plate is horizontally and coplanarly integrally fixed to the square pull plate, and the integral arc-shaped tongue plate and the square pull plate slide and adapt to displacement along the inner wall of the switch slot, for opening and closing the fluid channel of the arc-shaped pipeline; a pull plate handle is provided on the outer side of the square pull plate, the pull plate handle is a T-shaped structure, and the pull plate handle is always exposed outside the arc-shaped pipeline.

[0010] In the above technical solution, preferably, the pipeline switch device is a pipeline switch device made by cutting and welding 2-4mm steel plates.

[0011] In the above technical solution, preferably, the outer diameter of the top funnel is 280mm to 320mm and the wall thickness is 0.8 to 2mm.

[0012] In the above technical solution, preferably: the pipe handle is made of φ30mm steel pipe, and the length of the pipe handle is at least 300mm.

[0013] In the above technical solution, preferably, the outer diameter of the arc-shaped pipe is 70-80mm and the wall thickness is 2-4mm.

[0014] In the above technical solution, preferably, the bottom funnel has an outer diameter of 230-280 mm and a wall thickness of 0.8-2 mm.

[0015] Advantages of this utility model compared to the prior art:

[0016] 1. This utility model has a simple structure, is easy to operate, has low cost, and improves filling efficiency and personnel safety.

[0017] 2. When using this utility model, the operator only needs to put the diversion sand into the top funnel in advance, then lift the tool to the top of the ladle by the overhead crane, then hold the handle to adjust the position of the tool so that the bottom funnel is aligned with the ladle water outlet, and finally open the pipeline switch device to complete the filling. The operation process is simple and easy to understand, and the skill requirements for the operator are low.

[0018] 3. This utility model can perform arc-shaped diversion sand filling during the steel ladle baking process, avoiding the drawbacks of filling diversion sand before baking and before steel tapping; at the same time, the arc-shaped pipe design and the setting of the pipe handle control the flow rate while avoiding close contact between operators and high-temperature steel ladles, reducing the risk of personnel being burned by high temperature, and greatly improving filling efficiency and personnel safety. Attached Figure Description

[0019] Figure 1 This is the main view of the tool of this utility model;

[0020] Figure 2 This utility model Figure 1 Diagram showing the tool being used in conjunction with the ladle nozzle;

[0021] Figure 3(a) is a cross-sectional schematic diagram of the pipeline switch device of this utility model in the open state;

[0022] Figure 3(b) is a cross-sectional schematic diagram of the closed state of the pipeline switch device of this utility model;

[0023] Figure 4(a) is a front perspective view of the pipe switch device of this utility model in the open state;

[0024] Figure 4(b) is a perspective view of the closed state of the pipeline switch device of this utility model;

[0025] In the diagram: 1. Top funnel; 2. Pipe handle; 3. Pipe switch device; 4. Curved pipe; 5. Bottom funnel; 6. Steel ladle; 7. Steel ladle nozzle; 3-1. Switch slot; 3-2. Pull-out assembly; 3-201. Curved tongue plate; 3-202. Square pull-out plate; 3-203. Pull-out plate handle. Detailed Implementation

[0026] The following will refer to the appendix in the embodiments of this utility model. Figure 1 -4. The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] (like Figure 1 , Figure 2(As shown) A convenient steel ladle hot-filling sand-draining tool, the tool consists of a top funnel 1, a pipe handle 2, a pipe switch device 3, an arc-shaped pipe 4, and a bottom funnel 5.

[0028] The top funnel 1, which is wider at the top and narrower at the bottom, is fixedly connected to the top of the arc-shaped pipe 4. The pipe handle 2 is fixedly installed on one side of the arc-shaped pipe 4. A pipe switch device 3 is installed on the top of the arc-shaped pipe 4. The pipe switch device 3 is used to control the opening and closing of the sand draining inside the arc-shaped pipe 4. The bottom end of the arc-shaped pipe 4 is fixedly connected to the bottom funnel 5, which is narrower at the top and wider at the bottom. The bottom funnel 5 is adapted to the ladle nozzle 7 of the ladle 6.

[0029] The instruction manual indicates that the top funnel 1 has a structure that is wider at the top and narrower at the bottom. This design greatly facilitates the addition of drainage sand. Operators can easily pour large amounts of drainage sand into the top funnel 1 without worrying about spillage or difficulty in adding sand, effectively improving filling efficiency.

[0030] The instruction manual requires that the bottom funnel 5, with its smaller top and larger bottom structure, precisely matches the ladle nozzle 7 of the ladle 6. This ensures that the guiding sand accurately covers the nozzle position, preventing the guiding sand from scattering or unevenly covering, thus providing a good foundation for subsequent pouring operations.

[0031] The instruction manual requires the following: The curved pipe 4 tightly connects the top funnel 1 and the bottom funnel 5, forming a complete channel for conveying the guiding sand. The design of the curved pipe 4 ensures smooth flow of the guiding sand during transportation, reducing the possibility of blockage. Simultaneously, the shape of the curved pipe 4 conforms to ergonomic principles, allowing operators to easily adjust the position of tools using the pipe handle, ensuring the bottom funnel is accurately aligned with the ladle nozzle. Furthermore, the design of the curved pipe 4 ensures uniform guidance of the guiding sand during transportation. The guiding sand falls naturally along the curvature of the curved pipe 4, preventing accumulation or deviation during transportation. When the guiding sand reaches the bottom funnel 5 and covers the ladle nozzle 7, it forms a uniform covering layer, ensuring consistent sand thickness around the ladle nozzle 7 and providing stable conditions for subsequent pouring operations.

[0032] The instruction manual requires the following information: The pipe switch device 3 installed at the top of the curved pipe 4 is key to the ease of operation of this tool. Operators can easily control the flow of sand within the curved pipe 4 by simply pushing and pulling the switch. This fast-response switch design allows operators to precisely control the amount and timing of the sand filling according to actual needs, greatly improving the controllability and efficiency of the filling process.

[0033] The instruction manual requires the following: The pipe handle 2 of this tool is designed so that operators can operate the tool from a relatively safe distance. During the heating process of the ladle 6, the temperature around the ladle 6 is extremely high. Traditional straight-tube filling methods require operators to be in close contact with the ladle 6, posing a serious risk of burns. However, when using this tool, the operator only needs to hold the pipe handle 2, and the tool is placed above the ladle 6 and its position adjusted using an overhead crane. There is no need for direct contact with the high-temperature ladle 6, effectively avoiding the possibility of burns and greatly improving the safety of the operation.

[0034] Therefore, this tool allows for the filling of guide sand during the baking process of the ladle 6, avoiding the problem of ineffective heating of the ladle nozzle 7 caused by traditional pre-baking guide sand filling. During baking, heat can be transferred from the ladle 6 to the ladle nozzle 7, and the guide sand, after filling, also receives some heat radiation, allowing its surface to gradually sinter. During tapping, the sintered guide sand better resists the scouring of the steel flow, reducing the possibility of erosion and depression formation at the ladle nozzle 7. In subsequent refining, bottom argon blowing ensures effective circulation of the molten steel, preventing the formation of cold steel due to poor circulation, thus significantly reducing the risk of nozzle blockage and improving the casting rate and quality.

[0035] Furthermore, the tool consists of five main components: a top funnel 1, a pipe handle 2, a pipe switch device 3, an arc-shaped pipe 4, and a bottom funnel 5, resulting in a relatively simple structure. This simple design simplifies the manufacturing process and reduces costs. Simultaneously, the fewer components facilitate maintenance and replacement, further reducing operating costs. As mentioned earlier, the tool's ease of operation significantly improves the efficiency of filling the diversion sand. A fast and accurate filling process shortens ladle preparation time and improves the overall efficiency of the production line. In steel smelting production, time is money; increased production efficiency means more products can be produced per unit of time, thus bringing significant economic benefits to the enterprise.

[0036] (As shown in Figure 4) In the above embodiment, further: the pipeline switch device 3 consists of a switch slot 3-1 and a pull-out assembly 3-2. The outer wall of the switch slot 3-1 is sealed and fixedly installed in a through-hole manner on the side wall of the arc-shaped pipeline 4; the inner wall of the switch slot 3-1 is pulled out and fitted with the pull-out assembly 3-2. (As shown in Figure 3) The pull-out assembly 3-2 consists of an arc-shaped tongue plate 3-201, a square pull plate 3-202, and a pull plate handle 3-203. The arc-shaped tongue plate 3-201 is used to open and close the fluid channel of the arc-shaped pipe 4, and the arc-shaped tongue structure of the arc-shaped tongue plate 3-201 fits snugly against the inner wall of the inner wall of the arc-shaped pipe 4. The arc-shaped tongue plate 3-201 is horizontally and coplanarly integrally fixed to the square pull plate 3-202, and the integral arc-shaped tongue plate 3-201 and the square pull plate 3-202 slide and adapt to each other along the inner wall of the switch slot 3-1 to open and close the fluid channel of the arc-shaped pipe 4. The square pull plate 3-202 is provided with a pull plate handle 3-203 on the outside. The pull plate handle 3-203 is a T-shaped structure and is always exposed outside the body of the arc-shaped pipe 4.

[0037] It should be noted that the pull plate handle 3-203 adopts a T-shaped structure. Compared with handles of other complex structures, operators can control the movement of the pull assembly more stably and accurately, greatly reducing the difficulty of operation. Even novice operators can quickly get started. The pull plate handle 3-203 is always exposed on the outside of the arc-shaped pipe 4. When it is necessary to control the flow of the drainage sand, the handle can be quickly located and operated, saving operation time and improving filling efficiency. The integrated structure composed of the arc-shaped tongue plate 3-201 and the square pull plate 3-202 slides and adapts to the displacement along the inner wall of the switch slot 3-1. Operators can precisely control the opening and closing of the drainage sand and the flow rate in the arc-shaped pipe 4 by precisely controlling the pulling distance of the pull assembly 3-2, avoiding over-filling or under-filling of the drainage sand, and improving the controllability and accuracy of the filling process. The arc-shaped tongue structure of the arc-shaped tongue plate 3-201 fits snugly against the inner wall of the arc-shaped pipe 4, effectively preventing leakage of the diverting sand and avoiding accidental outflow of the diverting sand during non-filling periods, reducing material waste and maintaining a clean working environment. The outer wall of the switch slot 3-1 is sealed and fixedly installed through the pipe wall of the arc-shaped pipe 4, enhancing the sealing between the switch device and the arc-shaped pipe. The arc-shaped tongue plate 3-201 and the square pull plate 3-202 adopt a horizontally coplanar integrated fixed structure design. The connection between the two components is firm, and the integrated structure can withstand greater stress during frequent pull-out operations, making it less prone to component damage or deformation, thereby extending the service life of the pipeline switch device. The material selection and structural design of each component of the entire pipeline switch device 3 have been carefully considered to adapt to the high temperature and abrasion conditions of the hot-filling diverting sand working environment of the ladle 6. The arc-shaped tongue structure of the arc-shaped tongue plate 3-201 fits snugly against the inner wall of the arc-shaped pipe 4. The overall structure is compact and reasonable. The installation of the entire pipe switch device 3 on the arc-shaped pipe 4 will not take up too much space, and it is also convenient for operators to operate and maintain.

[0038] In the above embodiments, preferably, the pipeline switch device 3 is a pipeline switch device 3 made by cutting and welding 2-4mm steel plates.

[0039] Steel plates with a thickness of 2-4mm are common specifications, offering low material costs, economic efficiency, and moderate thickness. They eliminate the need for high-precision, high-cost equipment processing, reducing tool manufacturing costs. The structure boasts sufficient strength to prevent deformation and exhibits good structural stability. The manufacturing process is simple, lowering production costs. Excellent high-temperature resistance prevents softening and deformation, and the effects of thermal expansion are controllable. It is compatible with the overall tool structure and can be easily customized.

[0040] In the above embodiments, preferably, the outer diameter of the top funnel 1 is 280mm to 320mm and the wall thickness is 0.8 to 2mm.

[0041] The outer diameter range allows for a larger opening in the top funnel, making it easier for operators to pour in the drainage sand. This provides more space for the drainage sand during pouring, reducing the possibility of blockages caused by sand accumulation or poor flow. This size is well-matched to the dimensions of the curved pipe 4, ensuring a good seal. It also achieves a good balance in size and weight with other components (such as the pipe handle 2 and the bottom funnel 5). The 280mm–320mm outer diameter of the top funnel 1 offers some versatility, accommodating drainage sand addition operations for various sizes of steel ladles. The 0.8–2mm wall thickness provides sufficient strength and moderate weight, helping to save on material and processing costs. It also offers excellent high-temperature resistance, reducing the impact of thermal stress.

[0042] In the above embodiments, preferably, the pipe handle 2 is made of φ30mm steel pipe, and the length of the pipe handle 2 is at least 300mm.

[0043] Among them, the φ30mm steel pipe has a relatively large diameter, strong bending resistance, good compressive strength, extended service life, comfortable grip, moderate cost, and easy processing. It provides sufficient gripping and operating space, facilitating collaborative use by multiple people. A sufficient operating length of at least 300mm ensures a safe operating distance, prevents accidental collisions, and is compatible with the overall tool structure to meet the operational needs of different scenarios.

[0044] In the above embodiments, preferably, the outer diameter of the arc-shaped pipe 4 is 70-80 mm and the wall thickness is 2-4 mm.

[0045] The parameter control ensures reasonable flow control of the arc-shaped pipe 4, meeting the requirements for the conveying speed of the diverting sand. The diverting sand flows at an appropriate speed within the pipe, preventing splashing at the pipe end due to excessive speed and extending the filling time due to insufficient speed, thus improving the controllability and efficiency of the filling process. The dimensional control ensures good connection between the arc-shaped pipe 4 and the top funnel 1 and bottom funnel 5, coordinating with the pipe switching device 3, facilitating operation, installation and disassembly, and easy handling and storage. The reasonable wall thickness control of the arc-shaped pipe 4 is crucial. During the diverting sand conveying process, the arc-shaped pipe 4 needs to withstand the gravity of the diverting sand, the flow impact force, and possible external collisions. A wall thickness of 2-4mm provides sufficient strength to ensure that the pipe will not deform or break under these forces, extending its service life. A wall thickness of 2-4mm allows for reasonable control of material costs while meeting usage requirements. The processing technology for arc-shaped pipes within this wall thickness range is relatively mature. During the hot charging and sand diversion process in the steel ladle, the ambient temperature is relatively high. A wall thickness of 2-4 mm allows the arc-shaped pipe to maintain its strength while also possessing certain thermal conductivity.

[0046] In the above embodiments, preferably, the bottom funnel 5 has an outer diameter of 230-280 mm and a wall thickness of 0.8-2 mm.

[0047] The bottom funnel 5, with an outer diameter of 230–280 mm, has a suitable opening size, ensuring that the guiding sand is filled into the ladle at an appropriate flow rate and within a suitable range. The dimensions of the ladle inlet 7 vary depending on the ladle size; the 230–280 mm outer diameter range gives the bottom funnel 5 a degree of versatility, allowing it to match well with the ladle inlets 7 of various ladle sizes. Within this outer diameter range, the bottom funnel 5 achieves weight balance with other components (such as the top funnel 1, the curved pipe 4, and the pipe handle 2). In terms of tool design and usability, the bottom funnel within this outer diameter range does not occupy excessive space. The 230–280 mm outer diameter provides the operator with a good viewing angle. The bottom funnel 5 of this size is relatively convenient for handling and installation. The wall thickness of 0.8–2 mm provides sufficient strength for the bottom funnel 5 to withstand the weight of the guiding sand and external forces that may be applied during operation. Compared to thicker walls, a wall thickness of 0.8–2 mm effectively reduces the weight of the bottom funnel 5 while maintaining strength. A thicker wall for the bottom funnel 5 requires more steel, increasing material costs. A wall thickness of 0.8–2 mm minimizes steel usage and reduces material costs while meeting usage requirements. This wall thickness also facilitates cutting, bending, and welding during processing, reducing processing difficulty and increasing efficiency, thus lowering processing costs. During the hot-filling and sand-draining process of the ladle 6, the bottom funnel 5 is exposed to high temperatures. A wall thickness of 0.8–2 mm ensures the bottom funnel 5 maintains a certain level of thermal stability and structural strength under high-temperature conditions. The relatively thinner wall thickness also reduces the accumulation of thermal stress inside the funnel.

[0048] The preferred embodiment of this utility model has the following dimensions: the top funnel 1 has an outer diameter of 300mm and a wall thickness of 1mm. The pipe handle 2 is made of a 300mm long, φ30mm steel pipe. The pipe switch device 3 is made of a 3mm thick steel plate. The arc-shaped pipe 4 has an outer diameter of 75mm and a wall thickness of 2mm. The bottom funnel 5 has an outer diameter of 250mm and a wall thickness of 1mm.

[0049] The working principle of this utility model is as follows: Before filling with diverting sand, a certain amount of diverting sand is placed in the top funnel 1; then, the tool is steadily hoisted above the ladle 6 by a crane chain hook and slowly lowered; next, the operator holds the pipe handle 2 and adjusts the position of the sand outlet of the bottom funnel 5 of the arc-shaped pipe 4 in the tool, ensuring that the bottom funnel 5 below the arc-shaped pipe 4 is directly aligned with the ladle nozzle 7, i.e., the tool position is adjusted; after the tool position is adjusted, the pipe switch device 3 on the tool is opened, and the diverting sand slides down the curved pipe 4 at a controlled speed under the action of gravity until the diverting sand fills and covers the ladle nozzle 7. After the diverting sand is filled, the pipe switch device 3 is closed, and the tool is hoisted outside the ladle 6 by a crane, completing one filling operation.

[0050] As can be seen from the above description, when using this utility model, the operator only needs to put the diversion sand into the top funnel 1 in advance, then use an overhead crane to lift the tool to the top of the ladle 6, then hold the pipe handle 2 to adjust the position of the tool so that the bottom funnel 5 is aligned with the ladle water outlet 7, and finally open the pipe switch device 3 to complete the filling. The operation process is simple and easy to understand, and the skill requirements for the operator are low.

[0051] This invention allows for arc-shaped filling of guiding sand during the baking process of the ladle 6, avoiding the drawbacks of filling guiding sand before baking and before tapping. At the same time, the design of the arc-shaped pipe 4 and the setting of the pipe handle 2 control the flow rate while preventing operators from coming into close contact with the high-temperature ladle, reducing the risk of personnel being burned by high temperature, and greatly improving filling efficiency and personnel safety.

[0052] In summary, this utility model of a convenient hot-filling sand-draining tool for steel ladles, through its unique structural design, effectively solves the problems existing in current sand-draining filling methods, providing steel smelting enterprises with an efficient, safe, and convenient sand-draining filling solution. This utility model tool has a simple structure, is easy to operate, has low cost, and improves filling efficiency and personnel safety.

[0053] It should be understood that although this specification describes one embodiment, it does not mean that the embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in this embodiment can also be appropriately arranged and combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A convenient steel ladle hot-loading sand-draining tool, characterized in that: The tool consists of a top funnel (1), a pipe handle (2), a pipe switch device (3), an arc-shaped pipe (4), and a bottom funnel (5); The top funnel (1), which is larger at the top and smaller at the bottom, is fixedly connected to the top of the arc-shaped pipe (4). The pipe handle (2) is fixedly provided on one side of the arc-shaped pipe (4). A pipe switch device (3) is installed on the top of the arc-shaped pipe (4). The pipe switch device (3) is used to control the opening and closing of the sand drain in the arc-shaped pipe (4). The bottom end of the arc-shaped pipe (4) is fixedly connected to the bottom funnel (5), which is smaller at the top and larger at the bottom. The bottom funnel (5) is adapted to the ladle nozzle (7) of the ladle (6).

2. The tool according to claim 1, characterized in that: The pipeline switching device (3) consists of a switch slot (3-1) and a pull-out assembly (3-2); the outer wall of the switch slot (3-1) is sealed and fixedly installed in a through-hole manner on the side wall of the arc-shaped pipeline (4); the inner wall of the switch slot (3-1) is pulled out and fitted with the pull-out assembly (3-2); the pull-out assembly (3-2) consists of an arc-shaped tongue plate (3-201), a square pull plate (3-202), and a pull plate handle (3-203); the arc-shaped tongue plate (3-201) is used to open and close the fluid passage of the arc-shaped pipeline (4), and the arc shape of the arc-shaped tongue plate (3-201) is... The tongue structure fits snugly against the inner wall of the arc-shaped pipe (4); the arc-shaped tongue plate (3-201) is horizontally and coplanarly integrally fixed to the square draw plate (3-202), and the integral arc-shaped tongue plate (3-201) and the square draw plate (3-202) slide and adapt to each other along the inner wall of the switch slot (3-1) to open and close the fluid channel of the arc-shaped pipe (4); the square draw plate (3-202) is provided with a draw plate handle (3-203) on the outside, the draw plate handle (3-203) is a T-shaped structure, and the draw plate handle (3-203) is always exposed outside the arc-shaped pipe (4).

3. The tool according to claim 2, characterized in that: The pipeline switch device (3) is a pipeline switch device (3) made by cutting and welding 2-4mm steel plates.

4. The tool according to claim 3, characterized in that: The top funnel (1) has an outer diameter of 280mm to 320mm and a wall thickness of 0.8 to 2mm.

5. The tool according to claim 4, characterized in that: The pipe handle (2) is made of φ30mm steel pipe and the length of the pipe handle (2) is at least 300mm.

6. The tool according to claim 5, characterized in that: The arc-shaped pipe (4) has an outer diameter of 70-80 mm and a wall thickness of 2-4 mm.

7. The tool according to claim 6, characterized in that: The bottom funnel (5) has an outer diameter of 230-280 mm and a wall thickness of 0.8-2 mm.

Images