Closed powder discharging device for production of distilled metal zinc powder

Abstract

The utility model relates to a closed powder discharging device for production of distilled metal zinc powder. The closed powder discharging device consists of a zinc powder cooling unit, a zinc powder blanking unit and a closed powder collecting unit, the zinc powder discharging unit is located below the zinc powder cooling unit, a turning plate is arranged in the zinc powder discharging unit and connected with a rotating rod, and the turning plate is opened and closed through rotation of the rotating rod. When the turning plate is opened, produced metal zinc powder directly falls into the powder collecting box through the discharging unit. When the turning plate is closed, the turning plate rotating rod is hung on the turning plate rotating hook on the zinc powder cooling unit shell, produced metal zinc powder falls on the closed turning plate, and sealing is achieved. The closed powder collecting unit is located below the zinc powder discharging unit and composed of a box body, a powder collecting box body sealing door, a powder collecting box, a sealing door hinge and a sealing door movable buckle. And the powder collecting box is over against a discharging opening of the zinc powder discharging unit. According to the utility model, stable air pressure and continuous normal operation of a metal zinc powder production system during powder discharge can be effectively ensured, and the influence on production due to the fact that equipment is clamped by zinc bumps and zinc skins is effectively prevented.

Description

Technical Field

[0001] The utility model relates to a closed powder discharging device used in the production of distilled metal zinc powder, and specifically to a continuous closed powder discharging device for distilled metal zinc powder in the production process. The device can ensure that the system air pressure is stable and continuously operates normally during powder discharging, and effectively prevent zinc nodules and zinc scales from blocking the equipment and affecting production. Background Art

[0002] Distilled zinc powder is solid zinc heated and evaporated into zinc vapor. The zinc vapor enters the dispersion and condensation device through the air duct. After dispersion and condensation, it forms zinc powder and falls to the bottom of the cooling barrel. Finally, it is discharged from the bottom of the cooling barrel and sent to the grading workshop for particle size grading to produce zinc powder of different particle sizes, which is the final product. In order to ensure the product quality of zinc powder, the whole process from heating and evaporating solid zinc to dispersing and condensing zinc powder and finally falling to the bottom of the cooling barrel is carried out in a closed space under nitrogen protection.

[0003] In the past, the metal zinc powder that fell on the bottom of the cooling barrel was unloaded by a star-shaped unloader that rotated throughout the process. This made it easy for the zinc nodules produced during the condensation process to get stuck, making it impossible to unload. In addition, due to the long-term operation of the star-shaped unloader to unload, the scraper of the star-shaped unloader was squeezed with the zinc powder to produce zinc scale that adhered to the scraper, causing the star-shaped unloader to not work properly. After a period of time, it had to be stopped for cleaning, which increased labor intensity, low production efficiency, high operating costs, and unstable product quality. A more important defect was that during operation, air could easily enter the condensation barrel from the scraper of the star-shaped unloader, causing unstable air pressure fluctuations in the zinc powder production system. The incoming air would oxidize the zinc vapor, causing the effective metal zinc rate of the produced metal zinc powder to decrease, affecting product quality, and resulting in a low output rate or no output of high-end zinc powder. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a powder discharging closed device for the production of distilled metal zinc powder, which has simple discharging, good sealing performance, stable gas pressure of the production system and high effective zinc rate.

[0005] The technical solution of the utility model is:

[0006] A closed powder discharging device for producing distilled metal zinc powder mainly comprises a zinc powder cooling unit 1, a zinc powder feeding unit 2 and a closed powder collecting unit 3 which are sealed and connected in sequence from top to bottom.

[0007] The zinc powder cooling unit 1 is located below the metal zinc powder production device 0 and is generally in a trumpet shape with a larger top and a smaller bottom, and is used to cool the metal zinc powder.

[0008] The zinc powder unloading unit 2 includes a box body, which is closely connected from the bottom of the zinc powder cooling unit 1. A flap 21 that opens symmetrically to both sides is arranged in the unloading box body near the zinc powder cooling unit 1. A flap sealing gasket 25 is arranged on the edge of the flap 21. The flap 21 is connected to a flap rotating rod 22 that passes through the unloading box body. The flap 21 can be opened and closed by rotating the flap rotating rod 22. The flap rotating rod 22 is connected through a flap rotating bearing 24 arranged on the zinc powder unloading unit to achieve free rotation and drive the flap 21 to seal; when the flap 21 is closed, the handheld end of the flap rotating rod 22 located outside the box body is connected to the flap rotating hook 23 located on the shell of the zinc powder cooling unit 1 to maintain the closed state; when the flap 21 is opened, the handheld end of the flap rotating rod 22 naturally droops.

[0009] The closed powder collecting unit 3 is closely connected from the bottom of the zinc powder unloading unit 2, and consists of a cubic box, a powder collecting box sealing door 33 located on the front of the box, a powder collecting box 31 located in the box, a sealing door fastening beam 35 located on the powder collecting box sealing door 33, and a sealing door hinge and a sealing door movable buckle 34 located on the side of the box. A sealing door fastening screw 36 is also arranged between the powder collecting box sealing door 33 and the sealing door fastening beam 35. The sealing door fastening handle 37 connected thereto can be used to adjust the distance between the sealing door fastening beam 35 and the powder collecting box sealing door 33, thereby achieving further sealing of the box.

[0010] The upper opening of the powder collecting box 31 faces the discharge port of the zinc powder discharge unit 2, and the upper opening of the powder collecting box 31 is larger than the discharge port of the zinc powder discharge unit 2; a powder collecting box handle 32 is provided on the front of the powder collecting box 31, and casters are provided at the bottom to facilitate pulling out when discharging.

[0011] An air inlet valve 41 and an air exhaust valve 42 are respectively arranged on the left and right sides of the closed powder collecting unit 3 ; a pressure gauge 5 is also arranged on the upper half of the box of the closed powder collecting unit 3 .

[0012] Two sets of closed powder discharging devices for distillation of metal zinc powder production are arranged in parallel below the metal zinc powder production device 0.

[0013] The working principle of the utility model includes:

[0014] (1) Under normal production conditions, the flap 21 of the zinc powder unloading unit 2 is always open, that is, the flap 21 is perpendicular to the ground and facing downward, the powder collecting box 31 is in the closed powder collecting unit 3, and the powder collecting box sealing door 33 of the closed powder collecting unit 3 is closed and in a sealed state. The zinc vapor is cooled by the zinc powder cooling unit 1 and the metallic zinc powder produced directly falls into the powder collecting box 31 which is in a sealed state from the outside through the zinc powder unloading unit 2; the zinc powder unloading unit 2, the closed powder collecting unit 3 and the entire metallic zinc powder production device are in a whole and operate in a sealed state;

[0015] (2) Powder discharge process: When the metal zinc powder in the powder collecting box 31 reaches about two-thirds of the box body, powder discharge is required. First, the two flap rotating rods 22 connected to the flap 21 are rotated, and the two flap rotating rods 22 are respectively hung on the flap rotating rod hooks 23, so that the flap 21 is in a closed and sealed state and maintained for 20-30 minutes, so that the zinc powder produced during this period falls onto the flap 21 to fully seal it;

[0016] (3) After closing the flap for 20-30 minutes, open the exhaust valve 42 and the air inlet valve 41 on the sealed powder collecting unit 3. When the pressure of the sealed powder collecting unit 3 is equal to the external environmental pressure, turn the sealing door fastening handles 37 on the four sealing door fastening screws 36 on the powder collecting box sealing door 33, loosen and open the powder collecting box sealing door 33, and pull out the powder collecting box 31 filled with zinc powder from the sealed powder collecting unit 2 through the handle 32 on the powder collecting box 31, and clean the inner and outer boxes of the sealed powder collecting unit. After cleaning, push in an empty powder collecting box 31 and adjust the position of the powder collecting box 31 (the upper opening of the powder collecting box 31 is required to align with the discharge port of the zinc powder feeding unit 2 so that the falling zinc powder just falls into the powder collecting box 31). After that, close the powder collecting box sealing door 33, fasten the sealing door movable buckle 34, and then press the powder collecting box sealing door 33 through the sealing door fastening handle 37 on the powder collecting box sealing door 33 to make the door in a sealed state; after that, connect the nitrogen pipe to the air inlet valve 41 of the closed powder collecting unit 3 box and introduce nitrogen, so that the air in the closed powder collecting unit 3 box will be replaced and discharged from the exhaust valve 42, when the air is exhausted, close the exhaust valve 42 and continue to introduce nitrogen, when the nitrogen pressure in the closed powder collecting unit 3 box is equivalent to the nitrogen pressure in the cooling barrel, close the air inlet valve 41 and remove the nitrogen; then open the flap 21 of the zinc powder unloading unit 2 to make the zinc powder on the flap 21 fall into the powder collecting box 31. In this way, a powder discharging operation is completed, and the above operation is repeated in the next powder discharging process. Generally, powder is discharged once every 8-10 hours, and the powder discharging amount each time is about 2-3 tons.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a special closed powder discharging device for the production of distilled metal zinc powder, which can effectively ensure the stable system air pressure and continuous normal operation when discharging powder in the metal zinc powder production system, effectively prevent zinc nodules and zinc scales from getting stuck in the equipment and affecting the air pressure stability in production, and produce high-quality metal zinc powder with high production efficiency, low safety risks and low production and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : The utility model is a schematic diagram of the structure of a closed powder discharging device used in the production of distilled metal zinc powder.

[0020] Figure 2 : Schematic diagram of the zinc powder feeding unit structure.

[0021] Figure 3 : Schematic diagram of the flap structure.

[0022] Figure 4 : Schematic diagram of the closed powder collecting unit structure.

[0023] Figure 5 : Schematic diagram of the powder collecting box in the closed powder collecting unit.

[0024] Figure 6 : Schematic diagram of the powder collecting box structure.

[0025] Figure 7 : Schematic diagram of the sealing door structure.

[0026] Figure 8 : Schematic diagram of exhaust valve.

[0027] Fig. 9 : Schematic diagram of two sets of devices set up in parallel.

[0028] In the figure:

[0029] 0-Metallic zinc powder production device;

[0030] 1- Zinc powder cooling unit;

[0031] 2-zinc powder unloading unit, 21-flap, 22-flap rotating rod, 23-flap rotating rod hook, 24-flap rotating bearing, 25-flap sealing gasket;

[0032] 3-enclosed powder collecting unit, 31-powder collecting box, 32-powder collecting box handle, 33-powder collecting box sealing door, 34-sealing door movable buckle, 35-sealing door fastening beam, 36-sealing door fastening screw, 37-sealing door fastening handle;

[0033] 41-intake valve, 42-exhaust valve;

[0034] 5- Pressure gauge. DETAILED DESCRIPTION

[0035] Example 1

[0036] A closed powder discharging device for producing distilled metal zinc powder mainly comprises a zinc powder cooling unit 1, a zinc powder feeding unit 2 and a closed powder collecting unit 3 which are sealed and connected in sequence from top to bottom.

[0037] The zinc powder cooling unit 1 is located below the metal zinc powder production device 0 and is generally in a trumpet shape with a larger top and a smaller bottom, and is used to cool the metal zinc powder.

[0038] The zinc powder unloading unit 2 includes a cubic box body, which is closely connected from the bottom of the zinc powder cooling unit 1, and a flap 21 that is symmetrically opened to both sides is arranged near the zinc powder cooling unit 1, and a flap sealing gasket 25 is arranged on the edge of the flap 21. The flap 21 is connected to a flap rotating rod 22, and the flap 21 can be opened and closed by rotating the flap rotating rod 22. The flap rotating rod 22 is connected through a flap rotating bearing 24 arranged on the zinc powder unloading unit to achieve free rotation and sealing; when the flap 21 is closed, the handheld end of the flap rotating rod 22 located outside the box body is connected to the flap rotating hook 23 located on the shell of the zinc powder cooling unit 1 to maintain the closed state; when the flap 21 is opened, the handheld end of the flap rotating rod 22 naturally droops.

[0039] The enclosed powder collecting unit 3 is closely connected from the bottom of the zinc powder unloading unit 2, and is composed of a box body in a square shape, a powder collecting box body sealing door 33 located on the front of the box body, a powder collecting box 31 located in the box body, a sealing door fastening beam 35 located on the powder collecting box body sealing door 33, a sealing door hinge and a sealing door movable buckle 34 located on the side of the box body, and a sealing door fastening screw 36 is also arranged between the powder collecting box body sealing door 33 and the sealing door fastening beam 35. The sealing door fastening handle 37 connected thereto can adjust the distance between the sealing door fastening beam 35 and the powder collecting box body sealing door 33 so as to further seal the box body. The upper opening of the powder collecting box 31 is directly opposite to the unloading port of the zinc powder unloading unit 2, and the upper opening of the powder collecting box 31 is larger than the unloading port of the zinc powder unloading unit 2; the front of the powder collecting box 31 is provided with a powder collecting box handle 32, and casters are arranged at the bottom to facilitate pulling out when unloading.

[0040] The flap sealing gasket 25 is made of high temperature resistant sealing material.

[0041] The shell of the zinc powder unloading unit is a rectangular parallelepiped welded from rectangular steel plates, with dimensions of (length 400mm×width 400mm×height 300mm), the upper end of which is connected to the bottom of the discharge port of the zinc powder cooling unit by welding, and the lower end is connected to the closed powder collecting unit by welding; two flaps 21 connected to the flap rotating rod 22 by bearings 24 are respectively installed in the middle position of the shell; high temperature resistant sealing gaskets 25 are respectively installed on the flaps 21; the upper end of the flap rotating hook 23 is welded to the appropriate position of the zinc powder cooling unit shell.

[0042] The box body of the closed powder collecting unit 3 is a cube welded from steel plates, with dimensions of (length 1000mm×width 1000mm×height 1000mm), the upper end of which is connected to the bottom of the discharge port of the zinc powder feeding unit shell by welding, and the lower end is sealed and welded by square steel plates and placed on the ground, and a powder collecting box sealing door 33 with a high-temperature resistant sealing pad that can be opened and closed is installed on the front.

[0043] The powder collecting box 31 is a cube with an upper opening formed by welding steel plates, and its dimensions are (600 mm in length×600 mm in width×600 mm in height), and pushable rotating wheels are respectively installed at the four corners of the bottom.

[0044] Example 2

[0045] The manufacturing and installation process of the utility model includes:

[0046] 1. Production and installation of zinc powder unloading unit box

[0047] First, a rectangular component (length 400mm×width 400mm×height 300mm) with openings on both the top and the bottom is welded with a 10mm thick common steel plate, and then circular holes are respectively opened on both sides of the horizontal symmetry axis position (that is, 150mm) of the height of the rectangular component (one circular hole is opened at the front and rear of each side, and a total of four circular holes are opened), and bearings 24 are respectively installed at the circular holes, and the flap 21 and the corresponding flap rotating rod 22 are installed through the bearings 24, and then the installed bearings 24 are respectively sealed. It is required that when the flap rotating rod 24 is rotated, the flap 21 in the zinc powder unloading unit box body also rotates up and down to achieve the purpose of opening and closing, and it is not blocked or stuck, and can rotate freely, and the position of the bearing 24 after the sealing treatment is sealed and leak-proof;

[0048] After the above installation is completed, a high temperature resistant sealing gasket 25 is installed on the upper part of the two flaps 21. The flap 21 is a steel plate with a length of 380 mm, a width of 190 mm, and a thickness of 10 mm. The installed sealing gasket 25 is required to be flat. In this way, the zinc powder unloading unit box is completed.

[0049] Afterwards, weld the opening of the upper end of the manufactured zinc powder unloading unit box (the high-temperature resistant sealing gasket installed on the flap faces upward) to the discharge port at the bottom of the zinc powder cooling unit 1, and weld and install the fixed hook of the flap rotating hook 23 at the appropriate position on the zinc powder cooling unit 1 box. The opening at the lower end is used to install / weld the closed powder collecting unit box.

[0050] 2. Production and installation of closed powder collection unit

[0051] (1) Fabrication and installation of the sealed powder collecting unit 3 box: A 10 mm thick steel plate is used to weld a 1000 mm × 1000 mm × 1000 mm cube component with one side open and the other five sides sealed for standby use; the open side is used to install a sealed door that can be opened and closed;

[0052] (2) Production and installation of the air inlet pipe, exhaust pipe and pressure gauge 5 of the closed powder collecting unit 3 box: a circular hole with a diameter of 15 mm is opened at a position of the longitudinal central symmetry axis at the upper part of the left side of the opening surface, about 20 mm from the top, and an air inlet pipe with a valve is welded and installed; a circular hole with a diameter of 15 mm is opened at a position of the longitudinal central symmetry axis at the lower part of the right side of the opening surface, about 20 mm from the bottom, and an exhaust pipe with a valve is welded and installed; a circular hole with a diameter of 15 mm is opened at a position of the longitudinal central symmetry axis at the upper part of the back side of the opening surface, about 300 mm from the top, and a pressure gauge 5 is welded and installed.

[0053] (3) Production and installation of the powder collecting box sealing door 33: Two 50*40mm channel steels with a length of 1200mm are used. Holes are opened on both sides of each channel steel at a distance of 300mm from the end point and 34mm nuts are welded. Corresponding 400mm long screws are screwed on through threads, that is, two screws are installed on each channel steel and are 600mm apart. In this way, two nuts are formed on each of the two channel steels. The corresponding nuts are connected to the 400mm long screws through threads. Then, a square steel plate with a length and width of 1100mm and a thickness of 10mm is evenly installed on the four screws (the two sides of the four screws are required to be equal in length) passing through the nuts (installed into a rotating screw through bearing welding so that the steel plate can move forward and backward). The welded steel plate is required to be in the center position. Then, a sealing gasket is installed on the front of the welded steel plate. Then, a steel pipe with a length of about 200mm is vertically welded to the other end of each screw to serve as a sealing door fastening handle 37. When the sealing door fastening handle 37 is rotated, the steel plate mounted on the screw rod can move forward and backward, and the sealing door 31 is completed like this.

[0054] Two rotating shaft fixing buckles are welded and installed at the end position of the corresponding channel steel on the right outer side of the opening surface of the closed powder collecting unit 3, and two sealing door movable buckles 34 are welded and installed on the corresponding left outer side. One end of the corresponding channel steel (sealing door fastening beam 35) of the finished sealing door 31 is respectively installed on the right rotating shaft fixing buckle (the channel steel faces outward and the steel plate with the sealing gasket faces inward) to achieve the effect of free opening and closing of the door; when the door is closed, the sealing door movable buckle 34 corresponding to the left outer side is rotated to fasten the corresponding channel steel on the door, and then the steel plate with the sealing gasket is pressed by adjusting the hand on the rotating screw to close and seal the door.

[0055] (4) Production and installation of the closed powder collecting unit 3 box: Open a 400mm×400mm square hole in the middle of the top of the closed powder collecting unit 3 box with the sealing door 31 installed, and weld the corresponding square hole to the discharge port at the lower end of the zinc powder feeding unit 2 box.

[0056] (5) Production and installation of powder collecting box 31: First, a cube powder collecting box with a length of 600 mm, a width of 600 mm, and a height of 600 mm is welded with a 10 mm thick steel plate. The box has an upper opening and pushable rotating wheels installed at the four corners of the bottom. Then, a handle 32 is welded and installed at an appropriate position in the middle and upper part of the front of the powder collecting box. The powder collecting box is thus completed.

Claims

1. A closed powder discharging device for the production of distilled metal zinc powder, characterized in that: The device comprises a zinc powder cooling unit (1), a zinc powder feeding unit (2) and a sealed powder collecting unit (3) which are hermetically connected in sequence from top to bottom; The zinc powder cooling unit (1) is located below the metal zinc powder production device (0); The zinc powder unloading unit (2) comprises an unloading box, and a flap (21) is provided in the unloading box near the zinc powder cooling unit (1) and is symmetrically opened to both sides, and the flap (21) is connected to a flap rotating rod (22) passing through the unloading box; when the flap (21) is closed, the handheld end of the flap rotating rod (22) located outside the unloading box is connected to the flap rotating hook (23) located on the housing of the zinc powder cooling unit (1); when the flap (21) is opened, the handheld end of the flap rotating rod (22) naturally droops; The enclosed powder collecting unit (3) is closely connected from the bottom of the zinc powder feeding unit (2), and comprises a cubic box body, a powder collecting box body sealing door (33) located on the front of the box body, a powder collecting box (31) located inside the box body, and a sealing door hinge and a sealing door movable buckle (34) located on the side of the box body; the powder collecting box (31) has an opening at the top, facing the feeding port of the zinc powder feeding unit (2).

2. A closed powder discharging device for distillation of metallic zinc powder according to claim 1, characterized in that: The zinc powder cooling unit (1) is generally in the shape of a trumpet with a larger top and a smaller bottom, and is used to cool the metal zinc powder.

3. The closed powder discharging device for distillation of metallic zinc powder according to claim 1, characterized in that: A flap sealing pad (25) is arranged at the edge of the flap (21).

4. The closed powder discharging device for distillation of metallic zinc powder according to claim 1, characterized in that: A flap rotating bearing (24) is also provided at the connection between the unloading box of the zinc powder unloading unit (2) and the flap rotating rod (22), and the flap rotating rod (22) can rotate freely through the flap rotating bearing (24) and drive the flap (21) to open or close.

5. The closed powder discharging device for producing distilled metal zinc powder according to claim 1, characterized in that: The enclosed powder collecting unit (3) further comprises a sealing door fastening crossbeam (35) located on the powder collecting box sealing door (33) and a sealing door fastening screw (36) arranged between the powder collecting box sealing door (33) and the sealing door fastening crossbeam (35), and a sealing door fastening handle (37) connected thereto is used to adjust the distance between the sealing door fastening crossbeam (35) and the powder collecting box sealing door (33) so as to further seal the box.

6. The closed powder discharging device for producing distilled metal zinc powder according to claim 1, characterized in that: The upper opening of the powder collecting box (31) is larger than the discharge opening of the zinc powder discharge unit (2).

7. The closed powder discharging device for producing distilled metal zinc powder according to claim 1, characterized in that: The front of the powder collecting box (31) is provided with a powder collecting box handle (32), and the bottom is provided with casters.

8. The closed powder discharging device for producing distilled metal zinc powder according to claim 1, characterized in that: An air intake valve (41) and an air exhaust valve (42) are respectively arranged on the left and right sides of the closed powder collecting unit (3).

9. The closed powder discharging device for producing distilled metal zinc powder according to claim 1, characterized in that: A pressure gauge (5) is also provided on the upper half of the box body of the closed powder collecting unit (3).

10. A closed powder discharging device for producing distilled metal zinc powder according to any one of claims 1 to 9, characterized in that: Two sets of closed powder discharging devices for distillation of metal zinc powder production are arranged in parallel below the metal zinc powder production device (0).

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