Charging crown block for magnesium smelting

Abstract

The charging crown block comprises a hoisting trolley, a stock bin is arranged on the hoisting trolley, a plurality of discharging openings are evenly formed in the bottom of the stock bin, a spiral discharging mechanism is arranged in the stock bin, a discharging mechanism is arranged at the bottoms of the discharging openings, the discharging mechanism comprises a discharging tank, a discharging opening is formed in the bottom of the discharging tank, and the discharging opening is communicated with the discharging tank. A gravity valve is mounted at the discharge port; a driving plate is fixedly connected to the outer side of the discharging tank, a movable pulley is mounted on the driving plate, an electric hoist matched with the movable pulley is mounted on the hoisting trolley, and the movable pulley is connected with the electric hoist through a steel wire rope; a spiral discharging mode is adopted, impact on magnesium balls when the magnesium balls enter the stock bin is greatly reduced, the problem that the magnesium balls are broken due to high-position feeding is solved, automatic feeding operation is achieved by controlling the opening and closing time of the discharging valve, adding materials into the discharging mechanism and then enabling the discharging mechanism to be in butt joint with the vacuum furnace, and the automatic feeding efficiency is improved. And the production efficiency and the safety of the magnesium smelting process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting equipment, in particular to a charging overhead crane used for magnesium smelting. Background Art

[0002] Smelting is one of the methods for smelting magnesium. First, the magnesium ore is processed into magnesium balls through crushing, grinding and other processes, and then the magnesium balls are placed in a vacuum furnace for smelting. The smelting method can efficiently extract magnesium metal and is a commonly used industrial production method. However, in the current magnesium smelting process, since the strength of the raw material magnesium balls is not very high, when they fall from a height, they are very likely to break, affecting the smelting of magnesium. Therefore, it is impossible to use a large silo to store and feed the magnesium balls. Manual feeding is used, which is inefficient. The relevant operations of the vacuum furnace are also performed manually, such as the switch of the air intake pipe, the switch of the vacuum furnace, etc., and the temperature of the vacuum furnace is very high, which leads to an increase in the risk of manual operation. Therefore, the equipment for smelting magnesium by the smelting method needs to be optimized. Summary of the invention

[0003] The object of the present invention is to provide a charging crane for magnesium smelting, which adopts a spiral feeding method, greatly reducing the impact of magnesium balls when entering a silo, solving the problem that charging at a high place may cause the magnesium balls to break, and enabling the silo to store magnesium balls on a large scale; and then through the parameter feedback in the vacuum furnace, controlling the switching timing of the feeding valve, adding materials into the feeding mechanism, and then the feeding mechanism is connected to the vacuum furnace, thereby realizing the automatic feeding operation, and improving the production efficiency and safety of the magnesium smelting process.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a charging crane for magnesium smelting, comprising a lifting trolley, a silo is arranged on the lifting trolley, a feeding hopper is arranged on the top of the silo, a plurality of discharge ports are evenly opened at the bottom of the silo, a discharge valve is installed at the discharge port, and a spiral discharge mechanism is arranged inside the silo; the spiral discharge mechanism comprises a vertically arranged support rod, a spiral discharge plate is fixedly connected to the support rod, a baffle is arranged at the edge of the spiral discharge plate, a space is arranged between the baffle and the spiral discharge plate above it, and the size of the space is greater than the diameter of the magnesium ball; a placing valve is arranged at the bottom of the discharge port The material discharging mechanism comprises a discharging tank, a dust cover is arranged on the top of the discharging tank, the dust cover is sleeved on the outside of the discharge port, a discharging port with a tapered structure is arranged on the bottom of the discharging tank, a gravity valve is installed at the discharging port, the gravity valve comprises a valve block matching the discharging port, the valve block is located inside the discharging tank, an extension rod is vertically arranged on the bottom of the valve block, the bottom of the extension rod passes through the discharging port and is fixedly connected with a pressure plate; a driving plate is fixedly connected to the outside of the discharging tank, a movable pulley is installed on the driving plate, an electric hoist matching the movable pulley is installed on the lifting trolley, and the movable pulley and the electric hoist are connected by a wire rope.

[0005] Optionally, a cache mechanism is arranged between the discharge port and the discharge mechanism, and the cache mechanism includes a cache tank, a feed port is arranged on the side of the upper part of the cache tank, the feed port is connected to the discharge port, a discharge port is opened at the bottom of the cache tank, a discharge valve is installed at the discharge port, a dust cover is arranged on the outside of the discharge port, a fixing plate is arranged on the top of the dust cover, and the fixing plate is fixedly connected to the outside of the cache tank.

[0006] Optionally, a maintenance pipe is obliquely provided on the side of the upper portion of the cache tank, and the feed port is vertically connected to the side of the maintenance pipe.

[0007] Optionally, a magnesium dust collection device is also provided on the lifting trolley, and the magnesium dust collection device adopts a bag dust collector; dust collecting pipes are vertically arranged on both sides of the discharge tank, the bottom of the dust collecting pipes is located on both sides of the discharge port and is connected to the bottom of the discharge tank, the top of the dust collecting pipes is connected to the top of the discharge tank, and the tops of all the discharge tanks are connected to a dust collecting main pipe, which is connected to the inlet of the bag dust collector.

[0008] Optionally, the discharge valve includes a vertically arranged valve stem, the valve stem is located inside the buffer tank, a valve plate matching the discharge port is fixedly connected to the bottom of the valve stem, a telescopic cylinder is installed on the top of the buffer tank, and the piston end of the telescopic cylinder is fixedly connected to the valve stem.

[0009] Optionally, a telescopic tube is installed on the portion of the cache tank located inside the discharge tank, and the bottom of the telescopic tube is fixedly connected to the inner wall of the discharge tank.

[0010] Optionally, a silo magnesium dust collection pipe is provided on the top of the silo, and the silo magnesium dust collection pipe is also connected to the inlet of the bag dust collector.

[0011] Optionally, a plurality of spiral blanking plates are evenly arranged on the support rod.

[0012] Optionally, an electronic crane scale is provided on the steel wire rope.

[0013] The charging crane for magnesium smelting of the present invention has the following advantages: (1) According to the physical properties of magnesium balls, a spiral feeding method is adopted to reduce the impact force of magnesium balls falling into the silo and ensure the integrity of the magnesium balls. Through the parameter feedback of the vacuum furnace, the opening and closing timing of the feeding valve is controlled to add materials to the feeding mechanism. The feeding mechanism is then connected to the vacuum furnace to place the magnesium balls in the feeding mechanism into the vacuum furnace, thereby realizing automatic feeding operation, reducing the work intensity and danger of the staff, and improving the production efficiency and safety of the magnesium smelting process.

[0014] (2) The buffer mechanism can play a transitional role. The magnesium balls in the silo are first stored in the buffer tank. When the vacuum furnace needs to be fed, the magnesium balls fall from the buffer tank into the discharge tank. This can more accurately control the amount of magnesium balls added and further prevent the magnesium balls from being damaged.

[0015] (3) The magnesium dust collection device can collect the magnesium dust generated by the magnesium balls falling into the vacuum furnace. After being filtered by the bag filter, the magnesium dust is discharged from the outlet of the bag filter for recycling, thus avoiding the waste of resources.

[0016] (4) The electronic crane scale can measure the weight of the magnesium balls in each discharge tank, realize accurate charging of different vacuum furnaces, and improve the smelting quality of magnesium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a magnesium smelting vacuum furnace.

[0018] Figure 2 It is the front view of the present invention.

[0019] Figure 3 It is a side view of the present invention.

[0020] Figure 4 It is a schematic diagram of the spiral feeding mechanism.

[0021] Figure 5 It is a structural diagram of the cache mechanism.

[0022] Figure 6 It is a structural diagram of the discharge mechanism.

[0023] Figure 7 It is a connection diagram between the buffer mechanism and the discharge mechanism. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1 The structure diagram of the current magnesium smelting vacuum furnace is shown, which includes a furnace body 1 with an opening at the top, a furnace cover 2 is arranged on the top of the furnace body 1, a ventilation duct 3 is arranged at the bottom center of the furnace body 1, and a ventilation cover 4 is arranged on the top of the ventilation duct 3. When it is necessary to add materials to the vacuum furnace, the furnace cover 2 is opened, the ventilation cover 4 is closed, and then magnesium balls are added to the vacuum furnace; when smelting, the ventilation cover 4 is opened, the furnace cover 2 is closed, and the magnesium balls are heated. The operation of the entire process is completed manually, which has high labor intensity and high operation risk.

[0025] like Figure 2-Figure 7As shown, the charging crane of the present invention is used in conjunction with a magnesium smelting vacuum furnace, and the charging crane includes a lifting trolley 5, on which a silo 6 and a magnesium dust collecting device 7 are provided. A feeding hopper 8 is provided on the top of the silo 6, and three discharge ports 9 are evenly opened at the bottom of the silo 6. A discharge valve is installed at the discharge port 9 to control the discharge of the silo 6, and a spiral discharge mechanism is provided inside the silo 6. The spiral discharge mechanism includes a vertically arranged support rod 10, on which three spiral discharge plates 11 are fixedly connected, and the three spiral discharge plates 11 are evenly staggered, and a baffle 12 is provided at the edge of the spiral discharge plate 11, and a gap is provided between the baffle 12 and the spiral discharge plate 11 above it, and the size of the gap is greater than the diameter of the magnesium ball. The strength of magnesium balls is not high. If the material is discharged by free fall, the magnesium balls will be broken if the height is too high. However, the spiral discharge method changes the motion trajectory of the straight fall into a spiral descent, the motion path is increased, and there are factors such as friction and rotation that consume the gravitational potential energy of the magnesium balls. Therefore, the magnesium balls at a high altitude are subject to less impact force when falling into the silo 6, and are not easily broken, which ensures the integrity of the magnesium balls and provides them with sufficient storage space, which is beneficial to the subsequent smelting process.

[0026] A cache mechanism 13 is provided at the bottom of the discharge port 9, and a discharge mechanism 14 is provided at the bottom of the cache mechanism 13. The direction of the arrow in the attached figure is the moving path of the magnesium ball. The cache mechanism 13 includes a cache tank 15, and a maintenance pipe 16 is provided obliquely on the side of the upper part of the cache tank 15. A feed port 17 is vertically provided on the maintenance pipe 16, and the feed port 17 is connected to the discharge port 9. A discharge port 18 is provided at the bottom of the cache tank 15, and a discharge valve is installed at the discharge port 18. The discharge valve includes a vertically arranged valve stem 19, and the valve stem 19 is located inside the cache tank 15. A valve plate 20 matching the discharge port 18 is fixedly connected to the bottom of the valve stem 19. A telescopic cylinder 21 is installed on the top of the cache tank 15, and the piston end of the telescopic cylinder 21 is fixedly connected to the valve stem 19. The end of the maintenance pipe 16 is closed under normal conditions and will only be opened during maintenance. When the equipment is running, the feed port 17 is open. By controlling the switch of the discharge valve, magnesium balls are added to the buffer tank 15. The magnesium balls fall into the buffer tank 15 through the slope of the maintenance pipe 16. The inclined maintenance pipe 16 can also reduce the impact of the magnesium balls when they fall, further preventing the magnesium balls from being damaged. When the telescopic cylinder 21 drives the valve plate 20 to descend, the discharge port 18 opens, and the magnesium balls in the buffer tank 15 fall into the discharge tank 22. The telescopic cylinder 21 drives the valve plate 20 to rise, and the discharge port 18 closes. The buffer tank 15 stops adding magnesium balls to the discharge tank 22. Compared with directly unloading from the silo 6, the buffer tank 15 can provide a suitable transfer space to avoid excessive unloading at one time.

[0027] The discharge mechanism 14 includes a discharge tank 22, and a corrugated dust cover 23 is arranged on the top of the discharge tank 22. The dust cover 23 is sleeved on the outside of the discharge port 18, and a fixing plate 24 is arranged on the top of the dust cover 23. The fixing plate 24 is fixedly connected to the outside of the buffer tank 15. The dust cover 23 can ensure the airtightness of the connection between the discharge tank 22 and the buffer tank 15, and can also provide compensation in the vertical direction. Utilizing the compensation effect of the dust cover 23, the discharge tank 22 can move in the vertical direction relative to the buffer tank 15. A telescopic tube 25 is installed on the part of the buffer tank 15 located in the discharge tank 22. The bottom of the telescopic tube 25 is fixedly connected to the inner wall of the discharge tank 22. The telescopic tube 25 can compensate for the length of the buffer tank 15 when the discharge tank 22 moves. When the discharge tank 22 descends, the telescopic tube 25 is pulled open to keep the distance between the discharge port 18 and the discharge tank 22 stable, so as to avoid the discharge tank 22 from descending to a large height, causing the distance between the discharge port 18 and the discharge tank 22 to be too large, and the magnesium ball falls and breaks. A discharge port 26 with a tapered structure is provided at the bottom of the discharge tank 22. A gravity valve is installed at the discharge port 26. The gravity valve includes a valve block 27 that matches the discharge port 26. The valve block 27 is located inside the discharge tank 22. An extension rod 28 is vertically provided at the bottom of the valve block 27. The bottom of the extension rod 28 passes through the discharge port 26 and is fixedly connected to a pressure plate 29. The pressure plate 29 is used to cooperate with the ventilation duct 3 in the vacuum furnace. The outer sides of the three discharge tanks 22 are commonly fixedly connected with a drive plate 30, on which a movable pulley 31 is installed, and an electric hoist 32 matching the movable pulley 31 is installed on the lifting trolley 5, and the movable pulley 31 is connected to the electric hoist 32 by a wire rope 33, on which an electronic crane scale is installed, and the electric hoist 32 can drive the drive plate 30 to rise or fall, thereby realizing the movement of the discharge tank 22 in the vertical direction. Under normal circumstances, the gravity valve naturally droops under the action of gravity, the valve block 27 fits on the inner wall of the discharge port 26, and the discharge port 26 is closed; when magnesium balls need to be added to the vacuum furnace, the lifting trolley 5 is moved above the vacuum furnace so that the pressure plate 29 is located directly above the ventilation duct 3, and then the electric hoist 32 drives the discharge tank 22 to descend, and the pressure plate 29 will also descend accordingly. When the pressure plate 29 covers the top of the ventilation duct 3, the electric hoist 32 drives the discharge tank 22 to continue to descend. At this time, the ventilation duct 3 will push the gravity valve upward to open the discharge port 26, and the magnesium balls in the discharge tank 22 will all be added to the vacuum furnace, completing the automatic feeding of magnesium balls. The electronic crane scale can weigh the overall weight of the drive plate 30, that is, the weight of the discharge tank 22. When the buffer tank 15 adds magnesium balls to the discharge tank 22, the increased weight of the drive plate 30 is the corresponding weight of the magnesium balls in the discharge tank 22, thereby realizing quantitative feeding.

[0028] The lifting trolley 5 is also provided with a magnesium dust collecting device 7, and the magnesium dust collecting device 7 adopts a bag dust collector 34. Dust collecting pipes 35 are vertically arranged on both sides of the discharge tank 22, the bottom of the dust collecting pipe 35 is located on both sides of the discharge port 26 and is connected to the bottom of the discharge tank 22, the top of the dust collecting pipe 35 is connected to the top of the discharge tank 22, and the tops of all discharge tanks 22 are connected to a dust collecting main pipe 36, and the dust collecting main pipe 36 is connected to the inlet of the bag dust collector 34. The top of the silo 6 is provided with a silo magnesium dust collecting pipe 37, and the silo magnesium dust collecting pipe 37 is also connected to the inlet of the bag dust collector 34. When the magnesium ball collides during the falling process, magnesium dust will be generated. In the existing smelting process, magnesium dust is directly dissipated into the environment, which will cause waste of resources, pollution to the production environment, and affect the health of the staff. The magnesium dust generated in the silo 6 and the buffer tank enters the bag dust collector 34 through the silo magnesium dust collection pipe 37, and the magnesium dust generated in the discharge tank 22 and the vacuum furnace enters the bag dust collector 34 through the dust collection main pipe 36. The filtered air is discharged from the outlet of the bag dust collector 34, and the filtered magnesium dust accumulates at the bottom of the bag dust collector 34 and is finally discharged and collected uniformly, saving resources and maintaining a good production environment.

[0029] When feeding into the silo 6, magnesium balls are poured from the feed hopper 8, and the magnesium balls roll down along the spiral feed plate 11. The baffle 12 can ensure that the magnesium balls can always fall into the silo 6 at the bottom. The three spiral feed plates 11 are staggered by 120° to ensure that the magnesium balls are evenly distributed in the silo 6. As the material height in the silo 6 continues to increase, the magnesium balls will overflow from the gap between the baffle 12 and the spiral feed plate 11 into the silo 6 until the silo 6 is filled. The magnesium balls in the silo 6 can be stored in a small amount in the buffer tank 15 to facilitate the control of the feeding amount. The smelting conditions in each vacuum furnace are different. According to the parameter feedback in each vacuum furnace, the feeding amount of each vacuum furnace can be determined, and then by controlling the switch of the discharge valve and cooperating with the electronic crane scale, magnesium balls can be accurately added to each discharge tank 22 in a quantitative manner. Finally, the overhead crane is moved to align the discharge tank 22 with the vacuum furnaces that need to be charged. Driven by the electric hoist 32, the discharge tank 22 gradually descends. When the pressure plate 29 of the gravity valve covers the opening of the ventilation duct 3, the discharge tank 22 continues to descend and starts to charge the vacuum furnace. When all the magnesium balls in the discharge tank 22 are added to the vacuum furnace, the charging operation is completed. At the same time, the magnesium dust generated during the charging process will also be collected, which will not cause waste of resources and will not pollute the production environment. The entire charging process can be completed automatically, which reduces the labor intensity of workers and improves the safety of production. In addition, multiple discharge tanks 22 can perform precise quantitative charging operations on multiple vacuum furnaces at the same time, and the production accuracy and efficiency are also significantly improved.

[0030] The embodiments described above are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

Claims

1. A charging crane for magnesium smelting, comprising a lifting trolley, characterized in that: A silo is provided on the lifting trolley, a feed hopper is provided on the top of the silo, a plurality of discharge ports are evenly opened at the bottom of the silo, discharge valves are installed at the discharge ports, and a spiral discharge mechanism is provided inside the silo; the spiral discharge mechanism includes a vertically arranged support rod, a spiral discharge plate is fixedly connected to the support rod, a baffle is provided at the edge of the spiral discharge plate, a space is provided between the baffle and the spiral discharge plate above it, and the size of the space is greater than the diameter of the magnesium ball; a discharge mechanism is provided at the bottom of the discharge port, and the discharge mechanism includes a discharge tank, and the top of the discharge tank A dust cover is provided, and the dust cover is sleeved on the outside of the discharge port. A discharge port with a tapered structure is provided at the bottom of the discharge tank, and a gravity valve is installed at the discharge port. The gravity valve includes a valve block matching the discharge port, and the valve block is located inside the discharge tank. An extension rod is vertically provided at the bottom of the valve block, and the bottom of the extension rod passes through the discharge port and is fixedly connected with a pressure plate; a driving plate is fixedly connected to the outside of the discharge tank, and a movable pulley is installed on the driving plate. An electric hoist matching the movable pulley is installed on the lifting trolley, and the movable pulley and the electric hoist are connected by a wire rope.

2. The charging crane for magnesium smelting according to claim 1, characterized in that: A cache mechanism is arranged between the discharge port and the discharge mechanism, and the cache mechanism includes a cache tank. A feed port is arranged on the side of the upper part of the cache tank, and the feed port is connected with the discharge port. A discharge port is opened at the bottom of the cache tank, and a discharge valve is installed at the discharge port. A dust cover is arranged on the outer side of the discharge port, and a fixing plate is arranged on the top of the dust cover, and the fixing plate is fixedly connected to the outer side of the cache tank.

3. The charging crane for magnesium smelting according to claim 2, characterized in that: A maintenance pipeline is obliquely arranged on the side of the upper part of the buffer tank, and the feed port is vertically connected to the side of the maintenance pipeline.

4. The charging crane for magnesium smelting according to claim 2, characterized in that: The lifting trolley is also provided with a magnesium dust collection device, which adopts a bag dust collector; dust collecting pipes are vertically arranged on both sides of the discharge tank, the bottom of the dust collecting pipes is located on both sides of the discharge port and is connected with the bottom of the discharge tank, the top of the dust collecting pipes is connected with the top of the discharge tank, and the tops of all the discharge tanks are connected with a dust collecting main pipe, which is connected with the inlet of the bag dust collector.

5. The charging crane for magnesium smelting according to claim 2, characterized in that: The discharge valve includes a vertically arranged valve stem, which is located inside the buffer tank. A valve plate matching the discharge port is fixedly connected to the bottom of the valve stem. A telescopic cylinder is installed on the top of the buffer tank, and the piston end of the telescopic cylinder is fixedly connected to the valve stem.

6. The charging crane for magnesium smelting according to claim 2, characterized in that: A telescopic tube is installed on the portion of the buffer tank located inside the discharge tank, and the bottom of the telescopic tube is fixedly connected to the inner wall of the discharge tank.

7. The charging crane for magnesium smelting according to claim 4, characterized in that: A silo magnesium dust collection pipe is arranged on the top of the silo, and the silo magnesium dust collection pipe is also connected to the inlet of the bag dust collector.

8. The charging crane for magnesium smelting according to claim 1, characterized in that: A plurality of spiral blanking plates are evenly arranged on the support rod.

9. The charging crane for magnesium smelting according to claim 1, characterized in that: An electronic crane scale is installed on the wire rope.

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