Reduction furnace for preparing tungsten powder

Abstract

The utility model relates to the technical field of tungsten powder processing, and discloses a reduction furnace for preparing tungsten powder, which comprises a furnace body, a mounting plate capable of moving up and down is arranged above the furnace body, and the mounting plate is driven by a hydraulic cylinder fixed on the furnace body; a stirring shaft is rotationally mounted at the bottom of the mounting plate and extends into the furnace body; a scraping plate is fixedly arranged on the stirring shaft and is in sliding contact with the inner wall of the furnace body; a concentric-square-shaped frame is slidably mounted at the top of the furnace body in a limiting manner; the stirring shaft penetrates through the concentric-square-shaped frame; the penetrating hole in the middle of the concentric-square-shaped frame is matched with the scraper, and the scraper slidably penetrates through the penetrating hole in the middle of the concentric-square-shaped frame. A cleaning brush for cleaning the scraper is fixedly arranged in a through hole in the middle of the concentric-square-shaped frame; a linkage assembly is arranged between the concentric-square-shaped frame and the mounting plate, the concentric-square-shaped frame is in transmission fit with the mounting plate through the linkage assembly, and the linkage assembly is used for driving the concentric-square-shaped frame to slide back and forth in the horizontal direction. The cleaning device is high in automation degree, good in cleaning effect and high in cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tungsten powder processing technology, and in particular to a reduction furnace for preparing tungsten powder. Background Technology

[0002] The preparation of tungsten powder mainly involves the reduction of tungsten oxides, such as tungsten trioxide or ammonium paratungstate. The reduction furnace used in the preparation of tungsten powder is a key piece of equipment in the production process, and its main function is to provide a suitable high-temperature environment and atmosphere for the reduction reaction of tungsten oxides.

[0003] Based on the above technical features, the problem is that in the existing technology, after the reduction reaction is completed, the tungsten powder needs to be taken out of the reduction furnace. After the tungsten powder is taken out, the tungsten powder remaining in the reduction furnace needs to be cleaned. The existing cleaning process mostly requires manual cleaning, which has a low degree of automation and low cleaning efficiency.

[0004] Therefore, it is necessary to solve the above problems by using a reduction furnace for preparing tungsten powder. Utility Model Content

[0005] The purpose of this invention is to provide a reduction furnace for preparing tungsten powder, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reduction furnace for preparing tungsten powder, comprising a furnace body, wherein a vertically movable mounting plate is provided above the furnace body, and the mounting plate is driven by a hydraulic cylinder fixed on the furnace body;

[0007] The bottom of the mounting plate is rotatably mounted with a stirring shaft that extends into the furnace body; a scraper is fixedly mounted on the stirring shaft and slides in contact with the inner wall of the furnace body.

[0008] The top of the furnace body is limited by a sliding U-shaped frame, and the stirring shaft passes through the U-shaped frame; the perforation in the middle of the U-shaped frame matches the scraper, and the scraper slides through the perforation in the middle of the U-shaped frame;

[0009] A cleaning brush for cleaning the scraper is fixedly installed inside the perforation in the middle of the U-shaped frame;

[0010] A linkage component is provided between the U-shaped frame and the mounting plate. The U-shaped frame is driven to slide back and forth in the horizontal direction through the linkage component.

[0011] Preferably, the linkage component includes a slide rod, which is fixedly connected to the U-shaped frame; a drive shaft and a spring are fixedly mounted on the slide rod; a connecting block is fixedly mounted on the outer side wall of the furnace body; a vertically placed rack is fixedly mounted on the bottom of the mounting plate, and the teeth on the rack abut against the drive shaft for transmission; the spring is arranged along the sliding direction of the slide rod, with one end of the spring fixedly connected to the slide rod and the other end fixedly connected to the connecting block.

[0012] Preferably, the top of the furnace body has two cover plates for closing or opening the feeding port, and the two cover plates are symmetrically arranged relative to the stirring shaft; each of the opposite ends of the two cover plates has a semi-circular through hole for the stirring shaft to make way, and the stirring shaft is in sealed contact with the inner wall of the semi-circular through hole.

[0013] Preferably, two electric push rods are fixedly installed on the top of the furnace body, and two cover plates are located between the two electric push rods; the two electric push rods correspond one-to-one with the two cover plates, and the telescopic shaft of each electric push rod is fixedly connected to the corresponding cover plate.

[0014] Preferably, the furnace body is fixedly and connected to an exhaust pipe and a discharge pipe.

[0015] Preferably, a motor is fixedly mounted on the mounting plate, and the output shaft of the motor is coaxially and fixedly connected to the stirring shaft.

[0016] The technical effects and advantages of this utility model are as follows: This utility model cleans the residual tungsten powder on the inner wall of the furnace body by scraping and cleans the residual tungsten powder on the scraper by cleaning brush. At the same time, the upward movement of the scraper and the cleaning of the cleaning brush are linked, resulting in a high degree of automation and high cleaning efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the interior of the furnace body of this utility model;

[0019] Figure 3 This is a schematic diagram of the loop-shaped frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the cover plate of this utility model.

[0021] In the diagram: 1. Furnace body; 2. First fixed plate; 3. Electric push rod; 4. Cover plate; 5. Guide rod; 6. Second fixed plate; 7. Hydraulic cylinder; 8. Mounting plate; 9. Motor; 10. Stirring shaft; 11. Scraper; 12. Support plate; 13. Signal transmitter; 14. Signal receiver; 15. U-shaped frame; 16. Cleaning brush; 17. Slide rod; 18. Drive shaft; 19. Rack; 20. Connecting block; 21. Spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figures 1 to 4 The diagram shows a reduction furnace for preparing tungsten powder, comprising a furnace body 1, which is a vertically oriented circular furnace. A feeding port is located at the top of the furnace body 1, and support legs are fixedly installed at the bottom. A vertically movable mounting plate 8 is installed above the furnace body 1, horizontally positioned and driven by two hydraulic cylinders 7 fixed to the furnace body 1. The telescopic shafts of the two hydraulic cylinders 7 are vertically oriented upwards and fixedly connected to the bottom of the mounting plate 8. Two second fixing plates 6 are fixedly installed on the outer wall of the furnace body 1, symmetrically positioned with respect to the center of the furnace body 1. Each of the two second fixing plates 6 corresponds one-to-one with one of the two hydraulic cylinders 7, with each hydraulic cylinder 7 fixed to its corresponding second fixing plate 6.

[0024] A horizontal ring platform is fixedly fitted on the top of the furnace body 1. A retaining ring is coaxially fixed at the edge of the ring platform away from the furnace body 1. The retaining ring is located between the ring platform and the mounting plate 8.

[0025] Two semi-circular cover plates 4 are slidably installed on the top of the ring platform. The two cover plates 4 are symmetrically arranged. The two cover plates 4 slide close together and eventually dock to form a complete circular plate, which is used to slide and seal the feed port. The two cover plates 4 slide away and form a gap between them, which is used to open the feed port.

[0026] Two first fixing plates 2 are fixedly installed on the outer wall of the retaining ring. An electric push rod 3 is fixedly installed on each of the two first fixing plates 2. The telescopic shafts of the two first electric push rods 3 are horizontally opposite each other. Two cover plates 4 are located between the two first electric push rods 3. The two electric push rods 3 correspond one-to-one with the two cover plates 4. The telescopic shaft of each electric push rod 3 is fixedly connected to the corresponding cover plate 4.

[0027] Two guide rods 5 are fixedly installed at opposite ends of the two cover plates 4. The two guide rods 5 on the same cover plate 4 are parallel to each other. The telescopic shaft of each electric push rod 3 is parallel to the two guide rods 5 on the connected cover plate 4 and is located between the two guide rods 5 on the connected cover plate 4.

[0028] Each guide rod 5 has its end away from the connected cover plate 4 passing through a retaining ring and is in a limiting sliding fit with the retaining ring.

[0029] A gas outlet pipe and a material outlet pipe are fixedly and connected to the furnace body 1. The gas outlet pipe is located on the upper part of the side of the furnace body 1 and below the ring platform, and is used to discharge the gas generated during the reduction of tungsten oxide. The material outlet pipe is located at the bottom of the furnace body 1 and is used to discharge tungsten powder.

[0030] The motor 9 is fixedly mounted on the top of the mounting plate 8, and the stirring shaft 10 is rotatably mounted on the bottom of the mounting plate 8. The output shaft of the motor 9 is coaxially and fixedly connected to the stirring shaft 10. The stirring shaft 10 extends downwards coaxially into the furnace body 1. The opposite ends of the two cover plates 4 are provided with semi-circular through holes for the stirring shaft 10 to make way. When the two cover plates 4 form a circular plate to seal the feeding port, the stirring shaft 10 is in sealed contact with the inner wall of the semi-circular through hole.

[0031] A scraper 11 is fixedly installed on the shaft of the stirring shaft 10 inside the furnace body 1. The end of the scraper 11 away from the stirring shaft 10 slides in contact with the inner wall of the furnace body 1.

[0032] A sliding retaining frame 15 is mounted on the top of the furnace body 1. The retaining frame 15 is located inside the retaining ring, and the stirring shaft 10 passes through the retaining frame 15. The perforation in the middle of the retaining frame 15 matches the scraper 11, and the scraper 11 slides through the perforation in the middle of the retaining frame 15.

[0033] A cleaning brush 16 for cleaning the scraper 11 is fixedly installed inside the perforation in the middle of the U-shaped frame 15.

[0034] A linkage component is provided between the U-shaped frame 15 and the mounting plate 8. The U-shaped frame 15 is driven to cooperate with the mounting plate 8 through the linkage component. The linkage component is used to drive the U-shaped frame 15 to slide back and forth in the horizontal direction.

[0035] Specifically, the linkage component includes a slide rod 17, which is fixedly connected to the U-shaped frame 15. In this embodiment, the U-shaped frame 15 can be fixed to the slide rod 17 in an existing detachable installation manner to facilitate cleaning by the cleaning brush 16.

[0036] The slide rod 17 passes through the retaining ring and slides in a limiting engagement with the retaining ring. A drive shaft 18 and a spring 21 are fixedly mounted on the slide rod 17. A connecting block 20 is fixedly mounted on the outer side wall of the retaining ring. A rack 19 is fixedly mounted on the bottom of the mounting plate 8, and the rack 19 is vertically oriented. The teeth on the rack 19 engage with the drive shaft 18 in a transmission engagement. The spring 21 is positioned along the sliding direction of the slide rod 17, with one end fixedly connected to the slide rod 17 and the other end fixedly connected to the connecting block 20.

[0037] In this embodiment, motor 9 is a dual-head motor. The output shaft at the bottom of motor 9 is coaxially and fixedly connected to the stirring shaft 10, and a support plate 12 is fixedly mounted radially on the output shaft at the top of motor 9. A signal transmitter 13 is fixedly mounted at the bottom of the support plate 12, and a signal receiver 14 is fixedly mounted at the top of the mounting plate 8. The signal receiver 14 is located below the rotation circumference of the signal transmitter 13.

[0038] A heater is installed inside the furnace body 1. The heater is used to raise the temperature inside the furnace body 1. This is existing technology and will not be described in detail here. A microcomputer is fixedly installed on the furnace body 1. Two electric push rods 3, two hydraulic cylinders 7, a motor 9, a signal transmitter 13, a signal receiver 14, and the heater are all electrically connected to the microcomputer.

[0039] Working principle: When preparing tungsten powder using this reduction furnace, tungsten oxide raw material and carbon raw material are first added into furnace body 1 through the feeding port at the top of furnace body 1. After the tungsten oxide raw material is added, the telescopic shafts of the two electric push rods 3 push the two cover plates 4 to slide closer and finally connect. At this time, the two cover plates 4 seal the feeding port of furnace body 1.

[0040] Next, the heater raises the temperature inside furnace 1 until it reaches the reaction temperature. During the reaction, the generated gases are discharged through the gas outlet pipe. After the reaction is complete, the heater stops heating and the tungsten powder is discharged through the discharge pipe.

[0041] After the tungsten powder is discharged, some powder remains on the inner sidewall of the furnace body 1. At this time, the telescopic shafts of the two hydraulic cylinders 7 retract downwards, causing the mounting plate 8 to move downwards. The mounting plate 8 then pushes the stirring shaft 10 downwards. The stirring shaft 10 drives the scraper 11 downwards until the bottom of the scraper 11 contacts the bottom of the furnace body 1. Next, the motor 9 is started, and the output shaft of the motor 9 drives the stirring shaft 10 to rotate. The stirring shaft 10 drives the scraper 11 to scrape away the tungsten powder on the inner sidewall of the furnace body 1.

[0042] After the stirring shaft 10 rotates several times, the signal transmitter 13 and signal receiver 14 are turned on. When the output shaft of the motor 9 drives the support plate 12 to rotate the signal transmitter 13 to directly above the signal receiver 14, the signal receiver 14 receives the signal from the signal transmitter 13 and converts it into an electrical signal, which is then transmitted to the microcomputer, which stops the motor 9. At this time, the scraper 11 is located directly below the perforation in the middle of the U-shaped frame 15.

[0043] Subsequently, the telescopic shafts of the two electric push rods 3 pull the two cover plates 4 away, creating a gap between them. When the gap is much larger than the scraper 11, the two electric push rods 3 are shut off. At this time, the telescopic shafts of the two hydraulic cylinders 7 extend upward and drive the mounting plate 8 to move upward, which in turn pulls the stirring shaft 10 upward. The stirring shaft 10 drives the scraper 11 upward, and the scraper 11 passes through the gap between the two cover plates 4 and the through hole in the middle of the U-shaped frame 15 in sequence.

[0044] When the mounting plate 8 moves upward, it causes the rack 19 to move upward as well. The rack 19 pushes the drive shaft 18 away from the connecting block 20, and the drive shaft 18 drives the slide rod 17 to stretch the spring 21. When the drive shaft 18 disengages from the teeth of the rack 19, under the elastic force of the spring 21, the slide rod 17 drives the drive shaft 18 to move closer to the connecting block 20. During this process, the slide rod 17 drives the return frame 15 to slide back and forth.

[0045] As the scraper 11 slides through the perforation in the middle of the retaining frame 15, the cleaning brush 16 inside the perforation in the middle of the retaining frame 15 brushes off the tungsten powder on the scraper 11. During this process, due to the transmission of the teeth between the drive shaft 18 and the rack 19, as well as the elastic force of the spring 21, the slide rod 17 vibrates and transmits the vibration to the retaining frame 15. At this time, the retaining frame 15 shakes off the tungsten powder on the cleaning brush 16.

[0046] After the scraper 11 moves upward away from the return frame 15, the two hydraulic cylinders 7 can be shut down.

[0047] The tungsten powder brushed off from scraper 11 and shaken off from cleaning brush 16 are finally discharged from furnace body 1 through discharge pipe.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reduction furnace for preparing tungsten powder, comprising a furnace body (1), characterized in that: An up-and-down movable mounting plate (8) is provided above the furnace body (1), and the mounting plate (8) is driven by a hydraulic cylinder (7) fixed on the furnace body (1); A stirring shaft (10) is rotatably mounted on the bottom of the mounting plate (8), and the stirring shaft (10) extends into the furnace body (1); a scraper (11) is fixedly mounted on the stirring shaft (10), and the scraper (11) slides in contact with the inner wall of the furnace body (1). The top of the furnace body (1) is limited and slidably installed with a spiral frame (15), and the stirring shaft (10) passes through the spiral frame (15); the perforation in the middle of the spiral frame (15) matches the scraper (11), and the scraper (11) slides through the perforation in the middle of the spiral frame (15); A cleaning brush (16) for cleaning the scraper (11) is fixedly installed in the perforation in the middle of the rectangular frame (15). A linkage component is provided between the loop frame (15) and the mounting plate (8). The loop frame (15) is driven to cooperate with the mounting plate (8) through the linkage component. The linkage component is used to drive the loop frame (15) to slide back and forth in the horizontal direction.

2. A reduction furnace for preparing tungsten powder according to claim 1, characterized in that: The linkage component includes a slide rod (17), which is fixedly connected to the U-shaped frame (15); a drive shaft (18) and a spring (21) are fixedly installed on the slide rod (17); a connecting block (20) is fixedly installed on the outer side wall of the furnace body (1); a vertical rack (19) is fixedly installed at the bottom of the mounting plate (8), and the teeth on the rack (19) abut against the drive shaft (18) for transmission; the spring (21) is installed along the sliding direction of the slide rod (17), one end of the spring (21) is fixedly connected to the slide rod (17), and the other end is fixedly connected to the connecting block (20).

3. A reduction furnace for preparing tungsten powder according to claim 1, characterized in that: Two cover plates (4) for closing or opening the feeding port are slidably installed on the top limit of the furnace body (1). The two cover plates (4) are symmetrically arranged relative to the stirring shaft (10). The opposite ends of the two cover plates (4) are provided with semi-circular through holes for the stirring shaft (10) to make way. The stirring shaft (10) is in sealed contact with the inner wall of the semi-circular through hole.

4. A reduction furnace for preparing tungsten powder according to claim 3, characterized in that: Two electric push rods (3) are fixedly installed on the top of the furnace body (1), and two cover plates (4) are located between the two electric push rods (3); the two electric push rods (3) correspond one-to-one with the two cover plates (4), and the telescopic shaft of each electric push rod (3) is fixedly connected to the corresponding cover plate (4).

5. A reduction furnace for preparing tungsten powder according to claim 1, characterized in that: The furnace body (1) is fixedly and connected to an exhaust pipe and a discharge pipe.

6. A reduction furnace for preparing tungsten powder according to claim 1, characterized in that: The motor (9) is fixedly installed on the mounting plate (8), and the output shaft of the motor (9) is coaxially and fixedly connected to the stirring shaft (10).

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