A material distribution machine for building a furnace

Abstract

The application provides a distributing machine for furnace building, which comprises a hopper, a screw conveyor and a distributing pipe connected with the screw conveyor, and is arranged on a rotating disc. The screw conveyor comprises a screw shaft for conveying sand and an outer shell sleeved on the outer periphery of the screw shaft. Both ends of the screw shaft are connected with the outer shell through external bearings, so that the problem of bearing jamming caused by sand and dust and sand particles and shutdown maintenance can be avoided. A rotatable discharging nozzle is arranged and is inclined, so that the discharging position can be adjusted. The inclined discharging nozzle can buffer the falling sand and can also adjust the discharging position, so that the device can be applied to more size ranges of furnace bodies. A hanging nose is arranged at one end of the distributing pipe close to the discharging nozzle, a hanging column is arranged at one end of the discharging nozzle close to the distributing pipe, the hanging nose can be hung on the hanging column, the connection between the discharging nozzle and the distributing pipe is realized, and the device is quick and convenient to install and is stable in connection.

Description

Technical Field

[0001] This invention relates to the field of dry material feeding technology for medium-frequency electric furnaces.

[0002] Specifically, it relates to a material feeding machine for furnace construction. Background Technology

[0003] Currently, there are two main methods for furnace charging: manual charging and mechanical charging. Manual charging is the most primitive method, and many companies still use it out of necessity before charging machines are widely available. This method involves manually carrying, unpacking, and pouring bags of sand into the furnace. This results in severe dust pollution, high labor intensity, and high labor costs. When the furnace is deep, the falling sand can easily cause particle segregation, affecting the furnace's lifespan.

[0004] The existing mechanical feeding system, according to Chinese invention patent application number CN202110698031.9, is the first-generation feeding machine developed by our company. This system fixes the feeding machine to the crucible, with the hopper at the top and a screw conveyor below. The screw conveyor feeds the sand into the distribution pipe, completing the mechanical feeding and replacing manual labor. Chinese invention patent application number CN202410888737.5 is the second-generation feeding machine developed by our company. This generation solves the problems of jamming and difficulty in extending and retracting the telescopic material pipe. This generation uses a flexible hose with an internal shaftless helical spring, which has a bending function and can freely extend and retract according to the depth of the material level, bringing the discharge port close to the material level and outputting evenly while rotating. While this solves problems such as dust pollution, particle segregation, and excessive labor intensity, some issues remain. Firstly, the shaftless helical spring has a very short lifespan; sometimes it breaks after only a few hours of operation, requiring maintenance halfway through the shift without warning, making pre-shift inspection and prevention impossible. Secondly, the screw conveyor uses pre-purchased components. Because the screw conveyor has internal bearings, splashing sand and dust can wear down the seals, causing the bearings to seize and requiring downtime for maintenance. Thirdly, different furnace bodies have different sizes, while the screw conveyor's discharge port is always in the same position. Changing furnace bodies can lead to a mismatch between the discharge port and the feeding position, significantly limiting its application. Fourthly, if a rigid distribution pipe is used, different lengths need to be changed to follow changes in the bottom material level to prevent sand segregation. This requires changing the distribution pipe two or three times per feeding cycle, necessitating rapid on-site replacement, which ordinary connection methods cannot meet. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned traditional technologies and, in view of the deficiencies of the existing technologies, to provide a furnace-building material distribution machine.

[0006] The objective of this invention is achieved through the following technical measures: a furnace charging feeder, characterized in that it includes a hopper mounted on a turntable, a screw conveyor, and a feeding pipe connected to the screw conveyor. The screw conveyor includes a screw shaft for conveying sand and a housing fitted around the outer circumference of the screw shaft. Both ends of the screw shaft are connected to the housing via external bearings. The housing has an inlet and an outlet. A cavity for conveying sand is formed inside the housing. A first isolation cavity and a second isolation cavity are respectively provided at the ends of the cavity. The first isolation cavity is located between the inlet and the end of the housing furthest from the outlet. The second isolation cavity is located between the outlet and the end of the housing furthest from the inlet. The screw shaft is provided with a first spiral and a second spiral... A double spiral, wherein the first spiral and the second spiral rotate in opposite directions. The first spiral is located on one side of the discharge port, and the second spiral is located on the other side of the discharge port. A discharge pipe is provided at the discharge port, and the discharge pipe is connected to a discharge nozzle. The upper end of the discharge nozzle is connected to the discharge pipe, and the lower end is connected to the distribution pipe. The vertical axis of the upper end of the discharge nozzle is offset from the vertical axis of the lower end. The discharge nozzle is rotatable. A hanging nose is provided at the end of the distribution pipe near the discharge nozzle. A limiting groove is provided on the hanging nose. A hanging post is provided at the end of the discharge nozzle near the distribution pipe. The hanging nose and the hanging post are detachably connected. The hanging nose can be hung on the hanging post. When the hanging nose is hung on the hanging post, the hanging post is locked in the limiting groove.

[0007] As an improvement to the above technical solution: the lower end of the feeding tube is fixedly connected to an upper sliding ring, the upper end of the feeding nozzle is fixedly connected to a lower sliding ring, the lower end of the upper sliding ring and the upper end of the lower sliding ring are fitted together, the lower sliding ring can rotate around the circumference of the upper sliding ring, and the upper sliding ring and the lower sliding ring are in clearance fit.

[0008] As an improvement to the above technical solution: the upper end of the upper sliding ring is fixedly connected to the feeding pipe, and the lower end is provided with a first limiting boss protruding outward along the outer periphery, the outer diameter of the first limiting boss being larger than the outer diameter of the upper end.

[0009] As an improvement to the above technical solution: the lower end of the sliding ring is fixedly connected to the feeding nozzle, and the upper end is provided with a second limiting boss protruding inward along the inner circumference, the inner diameter of the second limiting boss being smaller than the inner diameter of the lower end.

[0010] As an improvement to the above technical solution: the first limiting boss and the second limiting boss are sized to match, the outer diameter of the upper end of the upper sliding ring is d1, the outer diameter of the first limiting boss at the lower end of the upper sliding ring is d2, the inner diameter of the second limiting boss at the upper end of the lower sliding ring is d3, and the inner diameter of the lower end of the lower sliding ring is d4, where d1 < d3 < d2 < d4.

[0011] As an improvement to the above technical solution: the distance between the center vertical line of the feed inlet and the center vertical line of the discharge outlet is L, and the material discharge position is expanded by a distance of 2L.

[0012] As an improvement to the above technical solution: multiple sets of hanging noses are arranged along the circumference of the fabric tube, multiple sets of hanging columns are arranged along the circumference of the feed nozzle, the hanging noses and hanging columns are arranged in a one-to-one correspondence, the hanging noses are installed on the pagoda head, the pagoda head is arranged in a ring shape, multiple sets of hanging noses are evenly distributed along the end of the pagoda head, the hanging noses are installed at one end, and the other end of the pagoda head is fixed to the end of the fabric tube.

[0013] As an improvement to the above technical solution: the nose clip is generally arranged in an inverted L shape. The nose clip includes a connecting part and a limiting part. The connecting part and the limiting part are connected end to end and arranged perpendicular to each other. The end of the connecting part away from the limiting part is fixed to the fabric tube. The connecting part and the limiting part are integrally formed. The limiting groove is located in the connecting part. One side of the limiting groove is closed, and the other side has an opening parallel to the limiting part and extends until it communicates with the outside.

[0014] As an improvement to the above technical solution: a notch is provided on the side of the limiting part away from the feeding tube, the notch is positioned facing the opening of the feeding nozzle, the notch is offset from the limiting groove, the notch is positioned on one side of the opening of the limiting groove, a pressure plate is provided on the feeding nozzle, the pressure plate is hinged to the feeding nozzle through a base, the base is fixed on the feeding nozzle, one end of the pressure plate is hinged to the base through a hinge shaft, the hinge shaft is positioned tangentially to the feeding nozzle, the pressure plate can rotate vertically along the hinge shaft, when the hook is attached to the hanging column, the pressure plate can rotate to the notch.

[0015] As an improvement to the above technical solution: the bearing near the feed inlet is the first bearing, and the distance from the first bearing to the feed inlet is L1, 100mm≥L1≥300mm; the bearing near the discharge outlet is the second bearing, and the distance from the second bearing to the discharge outlet is L2, 200mm≥L2≥400mm; the first spiral is arranged along the direction from the discharge outlet to the feed inlet until the end of the spiral shaft; the second spiral is arranged along the direction from the discharge outlet away from the feed inlet until the other end of the spiral shaft.

[0016] Compared with the prior art, the advantages of this invention, due to the adoption of the above technical solution, are as follows: By setting the bearing on the screw conveyor as an external bearing, the bearing is placed outside the cavity, which effectively avoids the problem of sand and dust jamming the bearing and causing downtime for maintenance. This ensures both the stability of the conveying and extends its service life. By setting a first isolation chamber and a second isolation chamber at the ends of the cavity, the first and second isolation chambers can isolate the sand from the ends. The screw shaft is equipped with a first spiral and a second spiral, which rotate in opposite directions. The first spiral is located on one side of the discharge port, and the second spiral is located on the other side. The first spiral in the first isolation chamber can transport the sand splashed into the first isolation chamber to the discharge port, while the second spiral in the second isolation chamber can ensure that the sand near the second bearing is transported in the opposite direction to the discharge port, thereby achieving isolation between the sand and the second bearing and further ensuring the sealing of the cavity ends. The device ensures that the sand will not affect the sealing device and bearings. It features a rotatable, tilted discharge nozzle that rotates along the discharge pipe, changing the position of the lower outlet and allowing for adjustable discharge position. The tilted nozzle also cushions the falling sand and adjusts the discharge position to suit different application scenarios, making the device suitable for furnaces of various sizes. A lug is installed at the end of the distribution pipe near the discharge nozzle, and a hanging post is installed at the end of the discharge nozzle near the distribution pipe. The lug attaches to the hanging post, connecting the discharge nozzle and the distribution pipe. Installation is quick and easy; simply rotate the pressure plate, slide it upwards, and then rotate again to press down the pressure plate. The connection is secure. Replacing the distribution pipe is simple: lift the pressure plate, rotate out the hanging post, pull it off, and then install the new distribution pipe using the same method. This invention combines all the advantages of existing mechanical feeding systems while improving upon the shortcomings of previous models.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a furnace-building material distribution machine according to the present invention.

[0019] Figure 2 This is a schematic diagram of the screw conveyor and discharge nozzle structure of a furnace-building material feeding machine according to the present invention.

[0020] Figure 3 This is a schematic diagram of the screw conveyor structure of a furnace-building material distribution machine according to the present invention.

[0021] Figure 4 This is a schematic diagram of the feeding nozzle connection structure of a furnace-building material feeding machine according to the present invention.

[0022] Figure 5This is a schematic diagram of the feeding nozzle structure of a furnace-building material feeding machine according to the present invention.

[0023] Figure 6 This is a top view schematic diagram of the feeding nozzle of a furnace-building material feeder according to the present invention.

[0024] Figure 7 This is a schematic diagram of the installation structure of the upper and lower sliding rings of a furnace-building material feeding machine according to the present invention.

[0025] Figure 8 This is a schematic diagram of the separation structure of the upper sliding ring and the lower sliding ring of a furnace-building material feeding machine according to the present invention.

[0026] Figure 9 This is a schematic diagram of the hanging nose and hanging column structure of a furnace-building material feeding machine according to the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: As attached Figure 1-9 As shown, a furnace-building material distribution machine includes a hopper 2 mounted on a turntable 1, a screw conveyor 3, and a material distribution pipe 4 connected to the screw conveyor 3. The bottom of the screw conveyor 3 is fixedly connected to the turntable 1. The screw conveyor 3 is equipped with an inlet 5 and an outlet 6. The outlet 6 is connected to the material distribution pipe 4, and the top inlet 5 is connected to the hopper 2. The material distribution pipe 4 is used for downward material distribution. A screw feeder 7 is also installed on the ground to feed material to the hopper 2. This solves the problem that, in the past, when the feeder was rotating (for safety reasons), it was impossible to add material to the hopper 2 using ton bags. The only solution was to stop the machine, add the ton bag material to the machine's hopper 2, and then restart the machine for material distribution.

[0029] Turntable 1 is mounted on fixed plate 8, and the cloth can be rotated on fixed plate 8. Fixed plate 8 is fixedly mounted on crucible. The structure and installation method of turntable 1 and fixed plate are the same as in the prior art, and will not be described in detail.

[0030] like Figure 2-3As shown, the screw conveyor 3 includes a screw shaft 9 for conveying sand and a housing 10 fitted around the outer periphery of the screw shaft 9. A cavity 11 for conveying sand is formed inside the housing 10. The screw shaft 9 rotates within the cavity 11 to convey the sand. The screw shaft 9 is connected to the housing 10 via bearings. In this embodiment, all bearings are external bearings, with both ends of the screw shaft 9 connected to the housing 10 via external bearings. The external bearings, positioned outside the cavity 11, effectively prevent sand and dust from jamming the bearings and causing downtime for maintenance, thus ensuring conveying stability and extending service life.

[0031] The outer casing 10 has an inlet 5 and an outlet 6, which are respectively located at both ends of the outer casing 10. In this application, the inlet 5 is used for sand to enter the cavity 11, and the outlet 6 is used for sand to flow out of the cavity 11. The spiral shaft 9 is arranged along the direction from the inlet 5 to the outlet 6, conveying sand from the inlet 5 to the outlet 6. In this embodiment, the bearing near the inlet 5 is designated as the first bearing 12, and the bearing near the outlet 6 is designated as the second bearing 13.

[0032] The cavity 11 has a first isolation cavity 14 and a second isolation cavity 15 at its ends. The first isolation cavity 14 is located between the inlet 5 and the end of the outer shell 10 furthest from the outlet 6, and the second isolation cavity 15 is located between the outlet 6 and the end of the outer shell 10 furthest from the inlet 5. The first isolation cavity 14 is located between the inlet 5 and the first bearing 12, where sand enters the cavity 11 from the inlet 5 and is used to isolate the sand from the first bearing 12. The second isolation cavity 15 is located between the outlet 6 and the second bearing 13, where sand leaves the cavity 11 from the outlet 6 and is used to isolate the sand from the second bearing 13.

[0033] In this application, the distance from the first bearing 12 to the feed inlet 5 is L1, where 100mm ≥ L1 ≥ 300mm. In this embodiment, L1 = 200mm. The distance from the second bearing 13 to the discharge outlet 6 is L2, where 200mm ≥ L2 ≥ 400mm. In this embodiment, L2 = 300mm.

[0034] A first spiral 16 and a second spiral 17 are provided on the spiral shaft 9. The first spiral 16 and the second spiral 17 rotate in opposite directions. The first spiral 16 is located on one side of the discharge port 6, and the second spiral 17 is located on the other side of the discharge port 6. In this application, the first spiral 16 is arranged along the discharge port 6 towards the inlet 5 until the end of the spiral shaft 9, and the second spiral 17 is arranged along the discharge port 6 away from the inlet 5 until the other end of the spiral shaft 9. Sand enters the cavity 11 through the inlet 5 and is conveyed to the discharge port 6 by the first spiral 16. The sand falls through the discharge port 6. The first spiral 16 in the first isolation cavity 14 can transport the sand splashed into the first isolation cavity 14 to the discharge port 6. The second spiral 17 in the second isolation cavity 15 can ensure that the sand near the second bearing 13 is transported in the opposite direction to the discharge port 6, thereby isolating the sand from the second bearing 13 and ensuring the sealing of the end of the cavity 11. One end of the spiral shaft 9 is connected to a geared motor via a transmission shaft. The geared motor drives the spiral shaft 9 to rotate, thereby realizing the conveying of sand.

[0035] In this embodiment, as Figure 2-7 As shown, a feed pipe 18, wider at the top and narrower at the bottom, is installed at the feed inlet 5 to facilitate the entry of sand. A discharge pipe 19 is installed at the discharge outlet 6, with a uniform diameter from top to bottom to ensure that the sand falls evenly from the discharge pipe 19. The discharge pipe 19 is connected to a discharge nozzle 20, with its upper end connected to the discharge pipe 19 and its lower end connected to the distribution pipe 4. The vertical axis of the upper end of the discharge nozzle 20 is offset from the vertical axis of the lower end, and the discharge nozzle 20 is rotatable.

[0036] like Figure 4-6 As shown, in this embodiment, an upper sliding ring 21 is fixedly connected to the lower end of the feeding pipe 19, and a lower sliding ring 22 is fixedly connected to the upper end of the feeding nozzle 20. The upper sliding ring 21 and the lower sliding ring 22 are fitted together with a clearance fit. The upper sliding ring 21 and the lower sliding ring 22 can only restrict lateral and axial movement. The lower sliding ring 22 can rotate circumferentially along the upper sliding ring 21, thereby allowing the feeding nozzle 20 to rotate along the feeding pipe 19, changing the position of the lower end of the feeding nozzle 20, and adjusting the discharge position.

[0037] like Figure 7-8As shown, the upper sliding ring 21 is cylindrical in shape, with its upper end fitted onto the outer circumference of the lower end of the feed tube 19 and fixedly connected to it. This connection can be achieved by welding, screwing, or other fixing methods. The lower end has a first limiting boss 23 protruding outwards along its outer circumference. The outer diameter of the first limiting boss 23 is significantly larger than the outer diameter of the upper end. The lower sliding ring 22 is also cylindrical in shape, with its lower end fitted onto the outer circumference of the upper end of the feed nozzle 20 and fixedly connected to it. This connection can be achieved by welding, screwing, or other fixing methods. The upper end has a second limiting boss 24 protruding inwards along its inner circumference. The inner diameter of the second limiting boss 24 is significantly smaller than the inner diameter of the lower end. The first limiting boss 23 and the second limiting boss 24 are sized to fit together, ensuring that when the lower sliding ring 22 is fitted onto the upper sliding ring 21, the second limiting boss 24 is positioned above the first limiting boss 23 and will not fall off.

[0038] like Figure 8 As shown, the outer diameter of the upper end of the upper sliding ring 21 is d1, and the outer diameter of the first limiting boss 23 at the lower end is d2. The inner diameter of the second limiting boss 24 at the upper end of the lower sliding ring 22 is d3, and the inner diameter of the lower end is d4, where d1 < d3 < d2 < d4. In this application, d3 matches d1, and d3 is 2mm larger than d1. d4 matches d2, and d4 is 2mm larger than d2. This achieves a clearance fit between the upper sliding ring 21 and the lower sliding ring 22, and the lower sliding ring 22 can rotate along the upper sliding ring 21 without falling off.

[0039] like Figure 5-6 As shown, the distance between the center vertical line of the upper end and the center vertical line of the lower end of the feeding nozzle 20 is L. L is the offset distance between the two ends of the feeding nozzle 20. When the feeding nozzle 20 rotates along the feeding tube 19, the discharge position can be changed. The deflection position of the discharge is a circle with the center of the upper end of the feeding nozzle 20 as the center and the radius as L. Within this circle, the feeding position can be adjusted as needed. Compared with the prior art, which can only discharge at the feeding tube 19, this application expands the feeding position by a distance of 2L, which greatly improves the versatility of the whole machine. The ability to change the feeding position makes this device applicable to furnaces of more sizes.

[0040] Both the upper sliding ring 21 and the lower sliding ring 22 are machined and assembled together. The upper end of the upper sliding ring 21 is then fixed to the feeding pipe 19, and the lower end of the lower sliding ring 22 is fixed to the feeding nozzle 20. In use, the entire machine is placed and fixed above the furnace body. The feeding nozzle 20 is rotated to adjust to the appropriate feeding position for normal material feeding. The inclined feeding nozzle 20 can buffer the falling sand and also allows for adjustment of the feeding position to meet different on-site usage scenarios.

[0041] like Figure 1 , Figure 2 and Figure 9As shown, a hanging nose 25 is provided at one end of the feeding tube 4 near the feeding nozzle 20. A limiting groove 26 is provided on the hanging nose 25. A hanging post 27 is provided at one end of the feeding nozzle 20 near the feeding tube 4. The hanging nose 25 and the hanging post 27 are detachably connected. The hanging nose 25 can be hung on the hanging post 27. When the hanging nose 25 is hung on the hanging post 27, the hanging post 27 is locked in the limiting groove 26, completing the quick connection between the feeding nozzle 20 and the feeding tube 4.

[0042] like Figure 2 and Figure 9 As shown, the hanging nose 25 is installed on the pagoda head 28, which is arranged in a ring shape. The hanging nose 25 is installed at one end. In this embodiment, the two are fixed by welding, but they can also be fixed by screws or other methods. Multiple sets of hanging noses 25 are provided, and the multiple sets of hanging noses 25 are evenly distributed along the end of the pagoda head 28 to make the force more even during hanging. The hanging nose 25 is generally inverted and includes a connecting part 29 and a limiting part 30. The connecting part 29 and the limiting part 30 are connected end to end and arranged perpendicularly to each other. The end of the connecting part 29 away from the limiting part 30 is fixed to the pagoda head 28. The connecting part 29 and the limiting part 30 are integrally formed.

[0043] The limiting groove 26 is located in the connecting part 29. One side of the limiting groove 26 is closed, and the other side has an opening parallel to the limiting part 30 and extends until it communicates with the outside.

[0044] like Figure 9 As shown, multiple sets of hanging posts 27 are also provided, evenly distributed along the circumference of the feed nozzle 20. Each hanging post 27 corresponds to a hook 25. In this embodiment, three sets of hanging posts 27 and hooks 25 are provided, but other numbers can also be used. The hanging post 27 is columnar, with one end fixed to the feed nozzle 20 and the other end extending radially outward from the end of the feed nozzle 20. In this embodiment, the hanging post 27 and the feed nozzle 20 are fixed by welding, but screwing or other fixing methods are also possible. A limiting ball 33 is provided at the end of the hanging post 27 away from the feed nozzle 20. The limiting ball 33 is spherical and integral with the hanging post 27. The diameter of the limiting ball 33 is larger than the diameter of the end of the hanging post 27 connected to the feed nozzle 20.

[0045] A notch 32 is also provided on the side of the limiting part 30 away from the pagoda head 28. The notch 32 is set facing the opening of the feed nozzle 20. The notch 32 is set on the side of the opening of the limiting groove 26. It is offset from the limiting groove 26.

[0046] A pressure plate 34 is provided on the feeding nozzle 20, and the hanging nose 25 is hung on the hanging post 27. The pressure plate 34 can rotate to the notch 32. This further restricts the hanging nose 25, preventing it from rotating or moving upwards during the feeding process, thus locking the feeding nozzle 20 and the fabric tube 4, making the connection between them more secure. Multiple pressure plates 34 can be provided, each corresponding to a hanging nose 25, or only one set can be provided, rotating only to one notch 32. In this embodiment, as shown... Figure 9 As shown, tablet 34 is provided with one set.

[0047] The pressure plate 34 is hinged to the feed nozzle 20 via a base 35. The base 35 is fixed to the feed nozzle 20. In this embodiment, it is fixed by welding. The base 35 is a U-shaped seat. One end of the pressure plate 34 is hinged to the base 35 via a hinge shaft 36. The hinge shaft 36 is tangentially arranged along the feed nozzle 20, and the pressure plate 34 can rotate vertically along the hinge shaft 36. Initially, each component is fixed. The end of the pagoda head 28 away from the hook 25 is fixedly connected to the end of the fabric tube 4. In this embodiment, the two are fixed by welding, but it can also be fixed by screws or other methods. During installation, rotate the pressure plate 34 upwards above the base 35, and then rotate the fabric tube 4 to mount the hanging nose 25 upwards onto the feed nozzle 20. Position the hanging post 27 at the end of the limiting part 30 away from the connecting part 29, until the limiting groove 26 is flush with the hanging post 27. Rotate the fabric tube 4, and the hanging nose 25 will rotate accordingly, with the limiting groove 26 facing the hanging post 27, until the hanging post 27 is positioned in the limiting groove 26. Then, rotate the pressure plate 34 downwards until it engages at the notch 32, thus connecting the feed nozzle 20 and the fabric tube 4. Installation is quick and easy; simply rotate the pressure plate 34 upwards, mount it, and then rotate again to press it down. The connection is secure. To replace the fabric tube 4, lift the pressure plate 34, rotate out the hanging post 27, and remove it. Then, install the new fabric tube 4 according to the installation method. In this application, the material distribution pipe 4 is made of wear-resistant and lightweight PE pipe. The initial position of the material distribution pipe 4 is 1 meter away from the position of the sand falling into the furnace. As the sand falls, the material level in the furnace gradually rises until it reaches the lower end of the material distribution pipe 4. Then the material distribution pipe 4 is replaced. The lower end of the replaced material distribution pipe 4 is also 1 meter away from the position of the sand falling into the furnace. The material distribution and pipe replacement are repeated until the material distribution is completed. In this way, the maximum height difference between the material distribution pipe 4 and the position of the sand falling into the furnace is 1 meter, which avoids dust and reduces the segregation of sand.

Claims

1. A furnace-building material placing machine, characterized in that: The system includes a hopper mounted on a turntable, a screw conveyor, and a distribution pipe connected to the screw conveyor. The screw conveyor includes a screw shaft for conveying sand and a housing fitted around the screw shaft. Both ends of the screw shaft are connected to the housing via external bearings. The housing has an inlet and an outlet. A cavity for conveying sand is formed inside the housing. A first isolation cavity and a second isolation cavity are respectively provided at the ends of the cavity. The first isolation cavity is located between the inlet and the end of the housing furthest from the outlet, and the second isolation cavity is located between the outlet and the end of the housing furthest from the inlet. The screw shaft has a first spiral and a second spiral. The rotation of the first spiral and the second spiral... The first spiral is located on one side of the discharge port, and the second spiral is located on the other side of the discharge port. A discharge pipe is provided at the discharge port, and a discharge nozzle is connected to the discharge port. The upper end of the discharge nozzle is connected to the discharge pipe, and the lower end is connected to the distribution pipe. The vertical axis of the upper end of the discharge nozzle is offset from the vertical axis of the lower end. The discharge nozzle is rotatable. A hanging nose is provided at the end of the distribution pipe near the discharge nozzle. A limiting groove is provided on the hanging nose. A hanging post is provided at the end of the discharge nozzle near the distribution pipe. The hanging nose and the hanging post are detachably connected. The hanging nose can be hung on the hanging post. When the hanging nose is hung on the hanging post, the hanging post is locked in the limiting groove.

2. The furnace-building material placing machine according to claim 1, characterized in that: The lower end of the feeding tube is fixedly connected to an upper sliding ring, and the upper end of the feeding nozzle is fixedly connected to a lower sliding ring. The lower end of the upper sliding ring and the upper end of the lower sliding ring are fitted together. The lower sliding ring can rotate around the circumference of the upper sliding ring. The upper sliding ring and the lower sliding ring are in clearance fit.

3. A furnace-building material placing machine according to claim 2, characterized in that: The upper end of the upper sliding ring is fixedly connected to the feed pipe, and the lower end is provided with a first limiting boss protruding outward along the outer circumference. The outer diameter of the first limiting boss is larger than the outer diameter of the upper end.

4. A furnace-building material placing machine according to claim 3, characterized in that: The lower end of the sliding ring is fixedly connected to the feeding nozzle, and the upper end is provided with a second limiting boss that protrudes inward along the inner circumference. The inner diameter of the second limiting boss is smaller than the inner diameter of the lower end.

5. A furnace-building material placing machine according to claim 4, characterized in that: The first limiting boss and the second limiting boss are sized to match. The outer diameter of the upper end of the upper sliding ring is d1, the outer diameter of the lower end of the upper sliding ring at the first limiting boss is d2, the inner diameter of the upper end of the lower sliding ring at the second limiting boss is d3, and the inner diameter of the lower end of the lower sliding ring is d4, where d1 < d3 < d2 < d4.

6. A furnace-building material placing machine according to claim 5, characterized in that: The distance between the center vertical line of the feed inlet and the center vertical line of the discharge outlet is L, and the discharge position is expanded by a distance of 2L.

7. A furnace-building material placing machine according to claim 1, characterized in that: Multiple sets of hanging noses are arranged around the fabric tube, and multiple sets of hanging posts are arranged around the feed nozzle. Each hanging nose and hanging post is arranged in a one-to-one correspondence. The hanging nose is installed on the pagoda head, which is arranged in a ring shape. Multiple sets of hanging noses are evenly distributed along the end of the pagoda head. The hanging nose is installed at one end, and the other end of the pagoda head is fixed to the end of the fabric tube.

8. A furnace-building material placing machine according to claim 7, characterized in that: The nose clip is generally arranged in an inverted L shape. The nose clip includes a connecting part and a limiting part. The connecting part and the limiting part are connected end to end and arranged perpendicular to each other. The end of the connecting part away from the limiting part is fixed to the fabric tube. The connecting part and the limiting part are integrally formed. The limiting groove is located in the connecting part. One side of the limiting groove is closed, and the other side has an opening parallel to the limiting part and extends until it communicates with the outside.

9. A furnace-building material placing machine according to claim 8, characterized in that: A notch is provided on the side of the limiting part away from the fabric tube. The notch faces the opening of the feeding nozzle and is offset from the limiting groove. The notch is located on one side of the opening of the limiting groove. A pressure plate is provided on the feeding nozzle. The pressure plate is hinged to the feeding nozzle through a base. The base is fixed on the feeding nozzle. One end of the pressure plate is hinged to the base through a hinge shaft. The hinge shaft is arranged tangentially to the feeding nozzle. The pressure plate can rotate vertically along the hinge shaft. When the hook is attached to the hanging post, the pressure plate can rotate to the notch.

10. A furnace-building material placing machine according to any one of claims 1 to 9, characterized in that: The bearing closest to the feed inlet is the first bearing, and the distance from the first bearing to the feed inlet is L1, where 100mm ≥ L1 ≥ 300mm. The bearing closest to the discharge outlet is the second bearing, and the distance from the second bearing to the discharge outlet is L2, where 200mm ≥ L2 ≥ 400mm. The first spiral is arranged along the direction from the discharge outlet to the feed inlet until the end of the spiral shaft. The second spiral is arranged along the direction from the discharge outlet away from the feed inlet until the other end of the spiral shaft.

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