A multi-stage drying device and method for tungsten powder production

Abstract

The present invention relates to the technical field of tungsten powder production, and particularly relates to a multi-stage drying device and method for tungsten powder production, including a support frame, a drum, a drying component, a wind tube, a lifting plate and a baffle; the support frame is rotatably connected with the drum; the support frame is provided with a drying component for drying tungsten powder; a wind tube for enhancing the drying effect on tungsten powder is arranged inside the drum; a plurality of lifting plates for lifting tungsten powder are arranged on the outer side of the wind tube; each lifting plate is fixedly connected with the inner side wall of the drum; a plurality of baffles for extending the hot air flow path are arranged on the outer side of the wind tube; each baffle is fixedly connected with the inner side wall of the drum; each baffle is fixedly connected with the corresponding lifting plate. The present invention realizes the full drying of tungsten powder sliding down along the outer side of the wind tube through the wind tube, which is beneficial to improving the heat conduction efficiency inside the drum, reducing heat loss, enhancing the drying effect on tungsten powder, and improving the drying rate of tungsten powder.

Description

Technical Field

[0001] The present invention relates to the technical field of tungsten powder production, and particularly to a multi-stage drying device and method for tungsten powder production. Background Art

[0002] The multi-stage drum dryer is an improved drum drying equipment that improves the drying efficiency and processing capacity by adding multiple drums. This design enables the material to be gradually dried on multiple drums, thereby achieving a more uniform and efficient drying effect.

[0003] When using the existing multi-stage drum dryer to dry tungsten powder, the tungsten powder is lifted to the upper part inside the drum by the lifting plate inside the drum and then naturally falls to the bottom of the drum, so that the tungsten powder fully contacts the hot air introduced into the drum during the falling process for drying. However, the drying operation that only dries the tungsten powder with hot air has poor drying efficiency, and the hot air is drawn out from the inside of the drum dryer before fully contacting the tungsten powder, resulting in a reduction in the utilization rate of the hot air, causing heat loss, and reducing the drying rate of the tungsten powder.

[0004] Furthermore, the existing drum dryer dries the tungsten powder by sucking hot air from the discharge port, and the suction mechanism is equipped with a cyclone discharger for secondary drying of the small particle tungsten powder sucked out. However, since the small particle tungsten powder is not fully dried, it is easy to remain and adhere to the suction pipeline between the drum and the cyclone discharger, which not only reduces the collection effect of the small particle tungsten powder but also increases the workload of subsequent equipment cleaning. Summary of the Invention

[0005] In order to overcome the shortcomings that the drying operation of tungsten powder in the existing drum dryer has poor drying efficiency, the utilization rate of hot air is reduced, resulting in a reduction in the heat conduction efficiency of tungsten powder and a decrease in the drying rate of tungsten powder. At the same time, small particle tungsten powder is easy to adhere to the suction pipeline between the drum and the cyclone discharger, reducing the collection effect of small particle tungsten powder and increasing the subsequent equipment cleaning workload, the present invention provides a multi-stage drying device and method for tungsten powder production.

[0006] The technical solution is as follows: A multi-stage drying device for tungsten powder production, comprising a support frame and a drum; the drum is rotatably connected to the support frame; the support frame is arranged in an inclined shape with the front end lower and the rear end higher; a feed inlet is arranged at the rear side of the support frame; a discharge outlet is arranged at the front side of the support frame; it further comprises a power assembly, a drying assembly, an air duct, a lifting plate and a baffle; the power assembly is arranged on the support frame; the power assembly is connected to the drum; the drying assembly for drying tungsten powder is arranged on the support frame; an air duct for enhancing the drying effect of tungsten powder is arranged inside the drum; the air duct is made of a heat-conducting material; a plurality of lifting plates for lifting tungsten powder are arranged on the outer side of the air duct; each lifting plate is fixedly connected to the inner wall of the drum; a plurality of baffles for extending the hot air flow path are arranged on the outer side of the air duct; each baffle is fixedly connected to the inner wall of the drum; each baffle is fixedly connected to the corresponding lifting plate.

[0007] Further, the drying assembly comprises an air delivery pipe, an air extraction pipe, a motor 1, a gear 1, a toothed ring 1, an air inlet pipe and a sealing plate; an air inlet pipe for delivering hot air is fixedly connected to the support frame; the air inlet pipe is communicated with the inside of the drum; an air delivery pipe for heating the air duct is rotatably connected to the support frame; the air delivery pipe is rotatably connected to an external hot air supply device; the air delivery pipe is communicated with the inside of the air duct and penetrates through the air duct from front to back; an air extraction pipe is fixedly connected to the front side of the support frame; a motor 1 is fixedly connected to the rear side of the support frame; a gear 1 is fixedly connected to the output end of the motor 1; a toothed ring 1 is fixedly connected to the outer side of the air delivery pipe; the gear 1 meshes with the toothed ring 1; a sealing plate for sealing the rear side of the air duct is fixedly connected to the support frame; the sealing plate is attached to the rear side of the air duct.

[0008] Further, each lifting plate and each baffle are made of a heat-absorbing material.

[0009] Further, it further comprises an arc-shaped plate; at the angle formed by each lifting plate and each baffle, an arc-shaped plate for reducing the accumulation of tungsten powder is fixedly connected; each arc-shaped plate is fixedly connected to the outer side of the air duct.

[0010] Further, it further comprises an arc-shaped strip; at the angle formed by each lifting plate and the air duct, an arc-shaped strip for reducing the accumulation of tungsten powder is fixedly connected.

[0011] Further, it further comprises an interception assembly, and the interception assembly comprises a fixing ring, an interception plate and a scraping blade; a fixing ring is fixedly connected to the front part of the support frame; an interception plate for intercepting small-particle tungsten powder is rotatably connected to the fixing ring; the front end of the air delivery pipe is fixedly connected to the interception plate; a scraping blade for cleaning the tungsten powder on the interception plate is fixedly connected to the left side of the fixing ring; the scraping blade is attached to the rear side of the interception plate.

[0012] Further, it further comprises an air hood, a transmission pipe and a partition plate; an air hood is rotatably connected to the front side of the air duct; the air hood is communicated with the inside of the air duct; a plurality of transmission pipes are fixedly connected and communicated with the air hood; each transmission pipe is fixedly connected and communicated with the fixing ring; a partition plate for blocking the air flow is fixedly connected to the inside of the fixing ring; the inside of the fixing ring is divided into an upper chamber and a lower chamber by the partition plate; the air extraction pipe is communicated with the upper chamber.

[0013] Further, it further includes a vibration system, which includes a knocking hammer, a limiting rod, and a conduction plate; several knocking hammers for knocking and vibrating the tungsten powder accumulated on the outer side of the air cylinder are fixedly connected to the outer side of the air delivery pipe; the connection part between the knocking hammer and the air delivery pipe is made of elastic metal material; a limiting rod for blocking and limiting the knocking hammer is fixedly connected to the opposite sides of the air hood and the blocking plate; several conduction plates for conducting the knocking force are fixedly connected to the inner side wall of the air cylinder.

[0014] Further, each lifting plate penetrates through the air cylinder and is fixedly connected to the corresponding conduction plate.

[0015] An operation method of a multi-stage drying device for tungsten powder production includes the following working steps:

[0016] Step 1: Heating, controlling the external hot gas supply device to convey hot gas into the air cylinder and the drum through the air delivery pipe and the air inlet pipe respectively to heat them.

[0017] Step 2: Thorough drying, adding tungsten powder into the drum, using the drum to drive the lifting plate and the baffle to lift the tungsten powder, so that the tungsten powder is in full contact with the air cylinder, enhancing the drying effect of the tungsten powder.

[0018] Step 3: Interception, intercepting the small-particle tungsten powder that is not thoroughly dried through the intercepting plate, and making the air delivery pipe drive the intercepting plate to rotate relative to the scraping blade to clean the tungsten powder intercepted on the intercepting plate.

[0019] Step 4: Back blowing, transmitting the hot gas entering the air cylinder to the fixed ring through the air hood and the transmission pipe to back blow the tungsten powder intercepted on the intercepting plate.

[0020] Step 5: Vibration, driving the knocking hammer to rotate through the air delivery pipe and knocking the conduction plate to vibrate and shed the tungsten powder adhered to the angles between the air cylinder, the lifting plate, and the baffle.

[0021] The beneficial effects of the present invention are as follows: The present invention realizes thorough drying of the tungsten powder sliding down along the outer side of the air cylinder through the air cylinder, which is beneficial to improving the heat conduction efficiency inside the drum, reducing heat loss, enhancing the drying effect on the tungsten powder, and increasing the drying rate of the tungsten powder;

[0022] By intercepting and guiding the hot air flow through the lifting plate and the baffle, it is beneficial to extend the flow path of the hot air, enabling the small-particle tungsten powder carried by the hot air to be in full contact with the hot air flow for drying, preventing the hot air from quickly reaching the discharge port position and discharging the small-particle tungsten powder carried by it, avoiding the small-particle tungsten powder being directly discharged before being thoroughly dried, and enhancing the drying effect on the small-particle tungsten powder;

[0023] By the arc-shaped pieces and arc-shaped strips, it prevents the tungsten powder from accumulating in the angle area formed by the lifting plate, the baffle, and the outer side of the air cylinder, avoiding the reduction of the drying effect caused by the accumulation of tungsten powder.

[0024] The small-particle tungsten powder is intercepted by an interception plate to prevent it from entering and adhering to the inside of the exhaust pipe, which is beneficial to reducing the workload of subsequent equipment cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic three-dimensional structure diagram of the first perspective of the present invention;

[0026] Figure 2 It is a schematic three-dimensional structure diagram of the second perspective of the present invention;

[0027] Figure 3 It is a schematic combined three-dimensional structure diagram of the drum, air duct, lifting plate, baffle, drying assembly and interception assembly of the present invention;

[0028] Figure 4 It is a schematic combined three-dimensional structure diagram of the drum, air duct, lifting plate, baffle, drying assembly, arc-shaped piece and arc-shaped strip of the present invention;

[0029] Figure 5 It is a schematic combined three-dimensional structure diagram of the air duct, lifting plate, baffle, drying assembly, arc-shaped piece and arc-shaped strip of the present invention;

[0030] Figure 6 It is a schematic combined three-dimensional structure diagram of the support frame, air duct, exhaust pipe and interception assembly of the present invention;

[0031] Figure 7 It is a schematic combined three-dimensional structure diagram of the air delivery pipe and the interception assembly of the present invention;

[0032] Figure 8 It is a schematic combined three-dimensional structure diagram of the drum, air duct, lifting plate, air delivery pipe, interception assembly and vibration system of the present invention;

[0033] Figure 9 It is a schematic combined three-dimensional structure diagram of the air duct, lifting plate, air delivery pipe, interception assembly and vibration system of the present invention;

[0034] Figure 10 It is a schematic combined three-dimensional structure diagram of the air duct, lifting plate, air delivery pipe and vibration system of the present invention.

[0035] Names and serial numbers of components in the figure: 1 - support frame, 1001 - feed inlet, 1002 - discharge outlet, 2 - drum, 3 - air duct, 4 - lifting plate, 5 - baffle, 101 - gas transmission pipe, 102 - air extraction pipe, 103 - motor 1, 104 - gear 1, 105 - gear ring 1, 106 - intake pipe, 107 - sealing plate, 108 - motor 2, 109 - gear 2, 110 - gear ring 2, 201 - arc-shaped piece, 202 - arc-shaped strip, 301 - fixing ring, 302 - intercepting plate, 303 - scraping blade, 304 - air hood, 305 - transmission pipe, 306 - partition plate, 401 - knocking hammer, 402 - limiting rod, 403 - conduction plate. Detailed implementation manners

[0036] The following describes the implementation manners of the present invention with reference to the accompanying drawings.

[0037] Example 1: As Figures 1 - 8 shown, a multi-stage drying device for tungsten powder production includes a support frame 1 and a drum 2; the drum 2 is rotatably connected to the support frame 1; the support frame 1 is arranged in an inclined shape with the front end lower and the rear end higher; a feed inlet 1001 is arranged at the rear side of the support frame 1; a discharge outlet 1002 is arranged at the front side of the support frame 1;

[0038] It further includes a power assembly, a drying assembly, an air duct 3, a lifting plate 4 and a baffle 5; a power assembly is arranged on the support frame 1; the power assembly is connected to the drum 2; a drying assembly is arranged on the support frame 1; an air duct 3 is arranged inside the drum 2; the air duct 3 is made of heat-conducting material; a plurality of lifting plates 4 are arranged on the outer side of the air duct 3; each lifting plate 4 is fixedly connected to the inner wall of the drum 2; a plurality of baffles 5 are arranged on the outer side of the air duct 3; each baffle 5 is fixedly connected to the inner wall of the drum 2; each baffle 5 is fixedly connected to the corresponding lifting plate 4.

[0039] The drying assembly includes a gas transmission pipe 101, an air extraction pipe 102, a motor 1 103, a gear 1 104, a gear ring 1 105, an intake pipe 106 and a sealing plate 107; an intake pipe 106 for conveying hot air is fixedly connected to the support frame 1; the intake pipe 106 is communicated with the inside of the drum 2; a gas transmission pipe 101 is rotatably connected to the support frame 1; the gas transmission pipe 101 is rotatably connected to an external hot air supply device; the gas transmission pipe 101 is communicated with the inside of the air duct 3 and penetrates through the air duct 3 from front to back; an air extraction pipe 102 is fixedly connected to the front side of the support frame 1; a motor 1 103 is fixedly connected to the rear side of the support frame 1; a gear 1 104 is fixedly connected to the output end of the motor 1 103; a gear ring 1 105 is fixedly connected to the outer side of the gas transmission pipe 101; the gear 1 104 meshes with the gear ring 1 105; a sealing plate 107 is fixedly connected to the support frame 1; the sealing plate 107 is attached to the rear side of the air duct 3.

[0040] Each lifting plate 4 and each baffle 5 are made of heat-absorbing materials, enabling the lifting plate 4 and the baffle 5 to absorb hot air, which is beneficial for drying when the tungsten powder comes into contact with the lifting plate 4 and the baffle 5, enhancing the drying effect on the tungsten powder.

[0041] The power assembly includes a second motor 108, a second gear 109, and a second gear ring 110; the second motor 108 is fixedly connected to the support frame 1; the second gear 109 is fixedly connected to the output end of the second motor 108; the second gear ring 110 is fixedly connected to the outside of the drum 2; the second gear 109 meshes with the second gear ring 110.

[0042] It further includes an arc-shaped plate 201; an arc-shaped plate 201 is fixedly connected at the common angle formed by each lifting plate 4 and each baffle 5; each arc-shaped plate 201 is fixedly connected to the outside of the air duct 3.

[0043] It further includes an arc-shaped strip 202; an arc-shaped strip 202 is fixedly connected at the common angle formed by each lifting plate 4 and the air duct 3.

[0044] It further includes an interception assembly, which includes a fixed ring 301, an interception plate 302, and a scraping blade 303; the fixed ring 301 is fixedly connected to the front part of the support frame 1; the interception plate 302 is rotatably connected to the fixed ring 301; the front end of the air delivery pipe 101 is fixedly connected to the interception plate 302; the scraping blade 303 is fixedly connected to the left side of the fixed ring 301; the scraping blade 303 is attached to the rear side of the interception plate 302.

[0045] It further includes an air hood 304, a transmission pipe 305, and a partition plate 306; the air hood 304 is rotatably connected to the front side of the air duct 3; the air hood 304 is in communication with the inside of the air duct 3; two symmetrically arranged transmission pipes 305 are fixedly connected and communicated with the air hood 304; each transmission pipe 305 is fixedly connected and communicated with the fixed ring 301; a partition plate 306 is fixedly connected to the inside of the fixed ring 301; the inside of the fixed ring 301 is divided into an upper chamber and a lower chamber by the partition plate 306; the air extraction pipe 102 is in communication with the upper chamber.

[0046] When drying the wet tungsten powder, control the second motor 108 to drive the second gear 109 to rotate, so that the second gear 109 drives the second gear ring 110 to rotate, and then drive the drum 2 to rotate on the support frame 1 through the second gear ring 110. While the drum 2 is rotating, drive the air duct 3 to rotate together through the lifting plate 4 and the baffle 5. Subsequently, control the external hot air supply device to supply hot air into the drum 2 from the air inlet pipe 106, and at the same time supply hot air into the inside of the air duct 3 from the air delivery pipe 101 through the external hot air supply device to heat the air duct 3. Then control the external air pump to suck the inside of the drum 2 through the air extraction pipe 102 to make the hot air flow inside the drum 2. After the drum 2 and the air duct 3 are preheated, control the external conveying device to convey the wet tungsten powder from the feed inlet 1001 into the drum 2.

[0047] After the tungsten powder enters the inside of the drum 2, the rear side of the air duct 3 is blocked by the blocking plate 107 to prevent the tungsten powder from entering the inside of the air duct 3, ensuring the normal transmission of the tungsten powder. Taking the front-to-back view as a reference, then the drum 2 drives the lifting plate 4 and the baffle 5 to rotate clockwise, so that the lifting plate 4 lifts the tungsten powder upward in the drum 2 to the upper side of the air duct 3 and then makes it slide down along the outside of the air duct 3. While the tungsten powder slides down along the outside of the air duct 3, the temperature generated by the hot air inside the air duct 3 is conducted to the outside of the air duct 3 made of heat-conducting material, fully drying the tungsten powder sliding along the outside of the air duct 3. Adding a direct-contact drying method on the basis of hot-air drying is beneficial to improving the heat conduction efficiency inside the drum 2, reducing heat loss, enhancing the drying effect on the tungsten powder, and increasing the drying rate of the tungsten powder. When the tungsten powder slides down along the outside of the air duct 3, due to the inclined shape of the support frame 1 and the drum 2 with the front lower and the rear higher, the tungsten powder after sliding falls forward in the drum 2 to between the next lifting plate 4 and the baffle 5, preparing for the next lifting and drying operation. When the hot air flow enters the drum 2 to dry the tungsten powder during the transmission process, the hot air flow is intercepted and guided by the lifting plate 4 and the baffle 5, so that the air flow flows toward the exhaust pipe 102 through the space between the drum 2 and the air duct 3, which is beneficial to extending the flow path of the hot air, enabling the small-particle tungsten powder carried by the hot air to fully contact the hot air flow for drying, preventing the hot air from carrying the small-particle tungsten powder to quickly reach the discharge port 1002 and be discharged, and avoiding the small-particle tungsten powder from being directly discharged before being fully dried, enhancing the drying effect on the small-particle tungsten powder.

[0048] It is also considered that when the lifting plate 4 and the baffle 5 lift the wet tungsten powder, the tungsten powder is likely to adhere and accumulate in the angular area formed by the lifting plate 4 and the baffle 5 due to high humidity, and at the same time, it is likely to adhere and accumulate in the angular area formed by the lifting plate 4 and the outside of the air duct 3, resulting in a reduction in the drying effect of the tungsten powder. Therefore, when the lifting plate 4 and the baffle 5 lift the wet tungsten powder, the angular area formed by the lifting plate 4 and the baffle 5 is blocked by the arc-shaped plate 201, and at the same time, the angular area formed by the lifting plate 4 and the outside of the air duct 3 is blocked by the arc-shaped strip 202, so that the tungsten powder contacts the arc-shaped plate 201 and the arc-shaped strip 202 during the lifting process, preventing the tungsten powder from accumulating in the angular area formed by the lifting plate 4, the baffle 5 and the outside of the air duct 3, and avoiding the reduction in the drying effect caused by the accumulation of the tungsten powder.

[0049] It is also considered that when the exhaust pipe 102 sucks the hot air inside the drum 2, the hot air carries the small-particle tungsten powder into the exhaust pipe 102. Although there is currently a cyclone discharger connected to the exhaust pipe 102 for secondary drying of the sucked small-particle tungsten powder, however, due to the insufficient drying of the smaller-particle tungsten powder, it is easy to remain and adhere to the inside of the exhaust pipe 102, which not only reduces the collection effect of the small-particle tungsten powder but also increases the workload of subsequent equipment cleaning. The specific solution process is as follows:

[0050] When the hot gas carries small particles of tungsten powder and moves toward the exhaust pipe 102, the small particles of tungsten powder are intercepted by the interception plate 302 to prevent the small particles of tungsten powder from entering and adhering to the exhaust pipe 102, which is conducive to reducing the workload of subsequent equipment cleaning. When the tungsten powder adheres to the interception plate 302, the control motor 103 drives the gear 104 to rotate. Based on the front and back view, the gear 104 drives the gear ring 105 and the air delivery pipe 101 to rotate clockwise, and the air delivery pipe 101 rotates During the process, the interception plate 302 is driven to rotate clockwise. During the rotation, the interception plate 302 passes through the scraper 303, and the small particles of tungsten powder intercepted on the interception plate 302 are scraped off by the scraper 303, so that the small particles of tungsten powder are discharged from the discharge port 1002 along with the tungsten powder in the drum 2, thereby preventing the small particles of tungsten powder from accumulating and clogging the interception plate 302, thereby ensuring the normal ventilation effect of the interception plate 302. When the interception plate 302 intercepts the tungsten powder, the partition 306 separates the inner side of the fixing ring 301 into the upper and lower parts. When the exhaust pipe 102 is sucking hot air, the hot air only passes through the space above the partition 306 in the fixed ring 301, and the space below the partition 306 in the fixed ring 301 is not sucked by the exhaust pipe 102. When the intercepting plate 302 rotates and passes through the scraper 303, and the small particles of tungsten powder adhering to the intercepting plate 302 are cleaned by the scraper 303, the hot air entering the air duct 3 is transmitted from the transmission pipe 305 to the space above the partition 306 in the fixed ring 301 through the air hood 304. In the space below the plate 306, when the intercepting plate 302 carries small particles of tungsten powder and rotates through the space below the partition 306 in the fixed ring 301, the hot air blown out from the inside of the intercepting plate 302 is blown back to enhance the cleaning effect of the intercepting plate 302, and at the same time facilitates the subsequent scraper 303 to scrape and clean the tungsten powder adhering to the intercepting plate 302, and the dried tungsten powder in the drum 2 is discharged from the discharge port 1002 to the next stage dryer for deep drying.

[0051] Example 2: Based on Example 1, Figures 8 - 10 As shown, it also includes a vibration system, which includes a percussion hammer 401, a limiting rod 402 and a conductive plate 403; a plurality of percussion hammers 401 in a circular array are fixedly connected to the outside of the gas pipe 101; the connection between the percussion hammer 401 and the gas pipe 101 is made of elastic metal material; the air hood 304 and the sealing plate 107 are fixedly connected to a limiting rod 402 on the opposite sides; and a plurality of conductive plates 403 in a circular array are fixedly connected to the inner wall of the air duct 3.

[0052] In order to enhance the striking force transmitted to the lifting plate 4 when the striking hammer 401 strikes the conductive plate 403, each lifting plate 4 passes through the air duct 3 and is fixedly connected to the corresponding conductive plate 403, which is beneficial to enhance the cleaning effect of tungsten powder accumulated at the angle between the lifting plate 4 and the air duct 3.

[0053] When the lifting plate 4 and the baffle 5 lift the wet tungsten powder above the air duct 3, the tungsten powder slides down along the outer side of the air duct 3. At this time, the air delivery pipe 101 drives the knocking hammer 401 to contact the limiting rod 402, and the limiting rod 402 blocks the knocking hammer 401. Taking the view from the back to the front as a reference, the knocking hammer 401 bends and deforms clockwise. When the knocking hammer 401 rotates past the limiting rod 402 along with the air delivery pipe 101, the bent and deformed knocking hammer 401 rebounds and resets under the action of its own elastic force, and impacts the conduction plate 403 during the rebounding process, so that the conduction plate 403 conducts the knocking force to the air duct 3, the lifting plate 4 and the baffle 5, facilitating the shaking off of the tungsten powder adhered to the air duct 3, the lifting plate 4 and the baffle 5, enhancing the cleaning effect of the tungsten powder adhered to the air duct 3, the lifting plate 4 and the baffle 5, and preventing the reduction of the drying effect caused by the accumulation of tungsten powder.

[0054] An operation method of a multi-stage drying device for tungsten powder production includes the following working steps:

[0055] Step 1: Heating, controlling the external hot gas supply device to convey hot gas into the air duct 3 and the drum 2 through the air delivery pipe 101 and the air inlet pipe 106 respectively to heat them.

[0056] Step 2: Sufficient drying, adding tungsten powder into the interior of the drum 2, using the drum 2 to drive the lifting plate 4 and the baffle 5 to lift the tungsten powder, making the tungsten powder fully contact with the air duct 3, and enhancing the drying effect of the tungsten powder.

[0057] Step 3: Interception, intercepting the small particle tungsten powder that is not sufficiently dried through the intercepting plate 302, and making the air delivery pipe 101 drive the intercepting plate 302 to rotate relative to the scraping blade 303 to clean the tungsten powder intercepted on the intercepting plate 302.

[0058] Step 4: Back blowing, transmitting the hot gas entering the air duct 3 to the fixed ring 301 through the air hood 304 and the transmission pipe 305 to back blow the tungsten powder intercepted on the intercepting plate 302.

[0059] Step 5: Vibration, driving the knocking hammer 401 to rotate through the air delivery pipe 101 and knocking the conduction plate 403 to vibrate and shed the tungsten powder adhered to the included angle between the air duct 3, the lifting plate 4 and the baffle 5.

[0060] Although the present invention has been described with reference to the exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all modifications and equivalent structures and functions.

Claims

1. A multi-stage drying device for tungsten powder production, comprising a support frame (1) and a drum (2); the drum (2) is rotatably connected to the support frame (1); the support frame (1) is arranged in an inclined shape with the front low and the rear high; a feed inlet (1001) is arranged at the rear side of the support frame (1); a discharge outlet (1002) is arranged at the front side of the support frame (1); and it is characterized in that, It also includes a power component, a drying component, a blower tube (3), a lifting plate (4) and a baffle (5); a power component is arranged on the support frame (1); the power component is connected to the drum (2); a drying component for drying tungsten powder is arranged on the support frame (1); a blower tube (3) for enhancing the drying effect of tungsten powder is arranged inside the drum (2); the blower tube (3) is made of a heat-conducting material; several lifting plates (4) for lifting tungsten powder are arranged on the outer side of the blower tube (3); each lifting plate (4) is fixedly connected to the inner wall of the drum (2); several baffles (5) for extending the hot air flow path are arranged on the outer side of the blower tube (3); each baffle (5) is fixedly connected to the inner wall of the drum (2); each baffle (5) is fixedly connected to the corresponding lifting plate (4); The drying component includes an air delivery pipe (101), an air extraction pipe (102), a first motor (103), a first gear (104), a first toothed ring (105), an air inlet pipe (106) and a sealing plate (107); an air inlet pipe (106) for delivering hot air is fixedly connected to the support frame (1); the air inlet pipe (106) is communicated with the inside of the drum (2); an air delivery pipe (101) for heating the blower tube (3) is rotatably connected to the support frame (1); the air delivery pipe (101) is rotatably connected to an external hot air supply device; the air delivery pipe (101) is communicated with the inside of the blower tube (3) and penetrates through the blower tube (3) from front to back; an air extraction pipe (102) is fixedly connected to the front side of the support frame (1); a first motor (103) is fixedly connected to the rear side of the support frame (1); a first gear (104) is fixedly connected to the output end of the first motor (103); a first toothed ring (105) is fixedly connected to the outer side of the air delivery pipe (101); the first gear (104) meshes with the first toothed ring (105); a sealing plate (107) for sealing the rear side of the blower tube (3) is fixedly connected to the support frame (1); the sealing plate (107) is attached to the rear side of the blower tube (3); It also includes an interception component, and the interception component includes a fixing ring (301), an interception plate (302) and a scraping blade (303); a fixing ring (301) is fixedly connected to the front part of the support frame (1); an interception plate (302) for intercepting small-particle tungsten powder is rotatably connected to the fixing ring (301); the front end of the air delivery pipe (101) is fixedly connected to the interception plate (302); a scraping blade (303) for cleaning the tungsten powder on the interception plate (302) is fixedly connected to the left side of the fixing ring (301); the scraping blade (303) is attached to the rear side of the interception plate (302); It also includes an air hood (304), a transmission pipe (305) and a partition plate (306); an air hood (304) is rotatably connected to the front side of the blower tube (3); the air hood (304) is communicated with the inside of the blower tube (3); several transmission pipes (305) are fixedly connected to and communicated with the air hood (304); each transmission pipe (305) is fixedly connected to and communicated with the fixing ring (301); a partition plate (306) for blocking the air flow is fixedly connected to the inside of the fixing ring (301); the inside of the fixing ring (301) is separated into an upper chamber and a lower chamber by the partition plate (306); the air extraction pipe (102) is communicated with the upper chamber.

2. The multi-stage drying device for tungsten powder production according to claim 1, wherein, Each lifting plate (4) and each baffle (5) are made of a heat-absorbing material.

3. The multi-stage drying device for tungsten powder production according to claim 2, characterized in that, It further includes an arc-shaped sheet (201); at the angle formed by each lifting plate (4) and each baffle (5), an arc-shaped sheet (201) for reducing the accumulation of tungsten powder is fixedly connected in common; each arc-shaped sheet (201) is fixedly connected to the outer side of the air cylinder (3).

4. The multi-stage drying device for tungsten powder production according to claim 3, characterized in that, It further includes an arc-shaped strip (202); at the angle formed by each lifting plate (4) and the air cylinder (3), an arc-shaped strip (202) for reducing the accumulation of tungsten powder is fixedly connected in common.

5. A multi-stage drying device for tungsten powder production according to claim 1, characterized in that, It further includes a vibration system, and the vibration system includes a knocking hammer (401), a limiting rod (402) and a conduction plate (403); several knocking hammers (401) for knocking and vibrating the tungsten powder accumulated on the outer side of the air cylinder (3) are fixedly connected to the outer side of the gas transmission pipe (101); the connection part between the knocking hammer (401) and the gas transmission pipe (101) is made of elastic metal material; a limiting rod (402) for blocking and limiting the knocking hammer (401) is fixedly connected in common on the opposite sides of the air hood (304) and the plugging plate (107); several conduction plates (403) for conducting the knocking force are fixedly connected to the inner side wall of the air cylinder (3).

6. A multi-stage drying device for tungsten powder production according to claim 5, characterized in that, Each lifting plate (4) penetrates through the air cylinder (3) and is fixedly connected to the corresponding conduction plate (403).

7. A method for operating a multi-stage drying device for tungsten powder production, characterized in that, The operation method uses a multi-stage drying device for tungsten powder production described in any one of claims 5-6, and includes the following working steps: Step 1: Heating, controlling the external hot gas supply device to respectively supply hot gas into the air cylinder (3) and the drum (2) through the gas transmission pipe (101) and the air inlet pipe (106) to heat them. Step 2: Sufficient drying, adding tungsten powder into the interior of the drum (2), using the drum (2) to drive the lifting plate (4) and the baffle (5) to lift the tungsten powder, so that the tungsten powder is in full contact with the air cylinder (3) to enhance the drying effect of the tungsten powder. Step 3: Interception, intercepting the small-particle tungsten powder that is not sufficiently dried through the intercepting plate (302), and making the gas transmission pipe (101) drive the intercepting plate (302) to rotate relative to the scraping blade (303) to clean the tungsten powder intercepted on the intercepting plate (302). Step 4: Reverse blowing, transmitting the hot gas entering the air cylinder (3) to the fixed ring (301) through the air hood (304) and the transmission pipe (305) to reverse blow the tungsten powder intercepted on the intercepting plate (302). Step 5: Vibration, driving the knocking hammer (401) to rotate through the gas transmission pipe (101) and knocking the conduction plate (403) to vibrate and shed the tungsten powder adhered to the angles between the air cylinder (3), the lifting plate (4) and the baffle (5).

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