Vacuum drying oven for purifying silicon carbide dry blank

Abstract

The utility model relates to the field of drying equipment, in particular to a silicon carbide dry blank purification vacuum drying oven, which is characterized in that two support plates which are oppositely arranged left and right are fixedly mounted in an oven body, a bearing plate which is driven by a power mechanism to move back and forth is arranged between the two support plates, and a mounting shaft which vertically extends is rotatably mounted on the bearing plate; a tray is fixedly mounted at the upper end of the mounting shaft; a rotating seat is rotationally arranged outside the mounting shaft in a sleeving manner, a gear coaxial with the mounting shaft is arranged on the rotating seat, and a rack meshed with the gear is fixedly mounted in the box body; a first ratchet mechanism is arranged between the rotating seat and the mounting shaft, and the rotating seat drives the mounting shaft to synchronously rotate through the first ratchet mechanism when rotating around a specific direction; the motor drives the lead screw to rotate in the specific direction and drives the nut to move forwards, and the nut drives the front end of the bearing plate and the tray above the bearing plate to stretch out of the outer side of the box body, so that a product to be dried is placed in the tray or the dried product is taken out of the tray.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, specifically to a vacuum drying oven for purifying silicon carbide blanks. Background Art

[0002] Silicon carbide, also known as silicon carbide stone, is produced by smelting raw materials such as quartz sand, petroleum coke (or coal coke), and sawdust (salt needs to be added when producing green silicon carbide) at high temperatures in an electric resistance furnace. Silicon carbide has stable chemical properties, high thermal conductivity, low coefficient of thermal expansion, and good wear resistance, therefore it is widely used in various fields.

[0003] Before sintering the silicon carbide billet, it is necessary to dry and dehydrate the billet to improve product quality. In the prior art, utility model patent application number CN216845350U discloses a ceramic vacuum drying device, including a drying cylinder. A fixed frame is fixedly connected to the top of the drying cylinder, and a closed door is hinged to one side of the fixed frame. A lifting mechanism and a rotating mechanism are installed inside the fixed frame. The rotating mechanism includes a moving plate, and a drive shaft is fixedly connected to the output end of a second motor. A rotating plate is fixedly connected to the surface of the drive shaft. The second motor drives the drive shaft to rotate around its own axis, and the rotation of the drive shaft drives the rotating plate to rotate synchronously around the axis of the drive shaft, thereby causing the ceramics on the rotating plate to rotate synchronously. This rotation method ensures more uniform and thorough drying of the ceramics.

[0004] When using the aforementioned ceramic vacuum drying equipment, the rotating plate used to place the ceramics cannot be moved outside the drying cylinder, which causes many inconveniences for taking out and putting in the products to be dried. After the products are dried, the staff has to open the closed door and put their hands into the drying cylinder to take out the dried products, which needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum drying oven for purifying silicon carbide blanks, which facilitates the placement and removal of products on the tray, thereby addressing the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vacuum drying oven for purifying silicon carbide blanks includes a box body with a door hinged to the front. Two support plates, arranged opposite each other, are fixedly installed inside the box body. A load-bearing plate, driven by a power mechanism, moves back and forth between the two support plates. A vertically extending mounting shaft is rotatably mounted on the load-bearing plate, and a tray is fixedly mounted on the upper end of the mounting shaft. A rotating seat is rotatably fitted around the mounting shaft, and a gear coaxial with the mounting shaft is mounted on the rotating seat. A rack meshing with the gear is fixedly installed inside the box body. A first ratchet mechanism is provided between the rotating seat and the mounting shaft. When the rotating seat rotates in a specific direction, the first ratchet mechanism drives the mounting shaft to rotate synchronously.

[0008] As a preferred technical solution, the first ratchet mechanism includes a circular groove located at the bottom of the rotating seat. The circular groove is coaxially arranged with the mounting shaft. A plurality of first ratchet teeth are evenly spaced circumferentially on the inner wall of the circular groove. The lower end of the mounting shaft extends into the circular groove and is fixedly mounted on a mounting seat. A pawl matching the first ratchet teeth is mounted on the mounting seat.

[0009] As a preferred technical solution, the specific direction is either clockwise or counterclockwise.

[0010] As a preferred technical solution, a second ratchet mechanism for preventing the mounting shaft from reversing is further provided between the support plate and the tray. The second ratchet mechanism includes an annular ratchet disc fixedly mounted on the support plate. The top of the ratchet disc is provided with a plurality of second ratchet teeth evenly spaced around its circumference. The bottom of the tray is provided with an elastic plate. One end of the elastic plate is fixedly mounted on the bottom of the tray, and the other end of the elastic plate elastically fits against the top of the ratchet disc and extends between two adjacent second ratchet teeth.

[0011] As a preferred technical solution, heating tubes are installed on the left and right side walls of the box respectively; a vacuum pump is installed on the top of the box, and the suction end of the vacuum pump extends into the box.

[0012] As a preferred technical solution, the support plate is provided with multiple ventilation holes.

[0013] As a preferred technical solution, the inner sides of the two support plates are fixedly installed with left and right opposite slide rails, and the bearing plate is slidably installed in the two left and right opposite slide rails; the power mechanism includes a lead screw driven by a motor to rotate, the lead screw extends along the length direction of the slide rail, and a lead screw nut that matches the lead screw is fixedly installed on the bearing plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This application facilitates the use of a motor to drive a lead screw to rotate in a specific direction, which in turn moves the lead screw nut forward. The lead screw nut then causes the front end of the support plate, along with the tray above the support plate, to extend out of the outer side of the chamber. This allows for the placement of products to be dried into the tray or the removal of dried products from the tray. Alternatively, after placing the products to be dried into the tray, the motor drives the lead screw to rotate in the opposite direction, which in turn moves the lead screw nut backward. The lead screw nut then moves the support plate and the tray into the chamber, allowing the chamber door to be closed for vacuum drying.

[0016] 2. In the process of vacuum drying the product, the present application can drive the bearing plate, gear and tray to move back and forth in a small range through the lead screw. Then the rack acts on the gear and drives the gear and the rotating seat to rotate clockwise and counterclockwise. The rotating seat drives the mounting shaft and the tray to rotate counterclockwise periodically through the first ratchet mechanism. The tray drives the product to be dried to rotate slowly inside the box, so that the product in the tray is heated more evenly and the drying efficiency of the product is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Front view diagram;

[0020] Figure 3 This is a schematic diagram of the structure at the bottom of the support plate according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the mounting shaft according to an embodiment of this utility model;

[0022] Figure 5 This is an exploded view of the mounting shaft according to an embodiment of this utility model;

[0023] Figure 6 This is a cross-sectional schematic diagram of the mounting shaft according to the present invention;

[0024] Figure 7 yes Figure 6 Schematic diagram of the AA section;

[0025] Figure 8 This is a schematic diagram of the top structure of the support plate in this utility model.

[0026] In the diagram: 1-Box body; 2-Box door; 3-Heating tube; 4-Vacuum pump; 5-Support plate; 6-Bearing plate; 7-Slide rail; 8-Motor; 9-Lead screw; 10-Bearing seat; 11-Lead screw nut; 12-Mounting shaft; 13-Tray; 14-Rotating seat; 15-Gear; 16-Horizontal plate; 17-Rack; 18-Circular groove; 19-First ratchet; 20-Mounting seat; 21-Annular groove; 22-Pawl; 23-Pin; 24-Spring; 25-Ratchet disc; 26-Second ratchet; 27-Elastic plate. DETAILED DESCRIPTION

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

[0028] like Figures 1 to 8 As shown, the vacuum drying oven for purifying silicon carbide blanks includes a chamber body 1, with a door 2 hinged to the front side of the chamber body 1. Multiple heating tubes 3, evenly spaced, are installed on the inner sides of the left and right side walls of the chamber body 1. A vacuum pump 4 is installed on the top of the chamber body 1, with its suction end extending into the chamber body 1. The product to be dried is placed inside the chamber body 1, and the door 2 is closed. The heating tubes 3 are turned on, and the vacuum pump 4 creates a negative pressure inside the chamber body 1, thus vacuum drying the product.

[0029] like Figure 1 and Figure 2 As shown, two support plates 5 are fixedly installed inside the box 1, which are arranged opposite each other. The upper and lower ends of the support plates 5 are fixedly connected to the inner wall of the box 1 by bolts. The support plates 5 are evenly distributed with multiple ventilation holes, which is conducive to the uniform distribution of heat inside the box 1.

[0030] like Figure 2 and Figure 3As shown, a support plate 6, driven by a power mechanism, is positioned between two support plates 5. Multiple sets of support plates 6 are evenly spaced vertically, allowing for simultaneous vacuum drying of large quantities of products. Specifically, two opposing slide rails 7 are fixedly installed on the inner sides of the two support plates 5. These slide rails 7 are also evenly spaced vertically to accommodate multiple support plates 6. The slide rails 7 extend forward and backward, and the support plates 6 slide within the two opposing slide rails 7. The power mechanism corresponds one-to-one with each support plate 6. The power mechanism includes a lead screw 9 driven by a motor 8. The lead screw 9 extends forward and backward along the length of the slide rail 7. The motor 8 is bolted to the rear of the housing 1. The rotation axis of the motor 8 extends forward into the housing 1 and connects to the rear end of the lead screw 9 via a coupling. The front end of the lead screw 9 is rotatably connected to one of the support plates 5 via a bearing seat 10. A nut 11 matching the lead screw 9 is bolted to the bottom of the support plate 6.

[0031] Specifically, the motor 8 drives the lead screw 9 to rotate in a specific direction, which in turn drives the lead screw nut 11 to move forward. The lead screw nut 11 causes the front end of the support plate 6, along with the tray 13 above the support plate 6, to extend out of the outside of the box 1, so that the product to be dried can be placed into the tray 13 or the dried product can be taken out of the tray 13. After the product to be dried is placed into the tray 13, the motor 8 drives the lead screw 9 to rotate in the opposite direction, which in turn drives the lead screw nut 11 to move backward. The lead screw nut 11 causes the support plate 6, along with the tray 13, to be retracted into the box 1. Then the box door 2 can be closed to vacuum dry the product.

[0032] like Figure 3 and Figure 4 As shown, a vertically extending mounting shaft 12 is rotatably mounted on the support plate 6 via bearings. A tray 13 is fixedly mounted on the upper end of the mounting shaft 12 via bolts. The tray 13 is circular and coaxial with the mounting shaft 12, and is used to place products to be dried. A cylindrical rotating seat 14 is rotatably sleeved on the lower end of the mounting shaft 12. The upper end of the rotating seat 14 is rotatably connected to the mounting shaft 12 via bearings. Multiple teeth are integrally formed on the lower outer side of the rotating seat 14, which are evenly spaced in the circumference. The multiple teeth surround to form a gear 15 coaxial with the mounting shaft 12. A horizontal plate 16 is fixedly mounted between the two support plates 5 below the support plate 6. A rack 17 that meshes with the gear 15 is fixedly mounted on the top of the horizontal plate 16. The rack 17 extends back and forth. When the gear 15 and the rack 17 are in the meshing state, the support plate 6 and the tray 13 are completely retracted into the box 1.

[0033] A first ratchet mechanism is provided between the rotating base 14 and the mounting shaft 12. When the rotating base 14 rotates in a specific direction, the first ratchet mechanism drives the mounting shaft 12 to rotate synchronously. The specific direction is either clockwise or counterclockwise.

[0034] Specifically, after the product to be dried is placed on tray 13, motor 8 drives screw 9 to rotate in the opposite direction, causing the support plate 6 and tray 13 to retract into the chamber 1. Then, the chamber door 2 is closed to vacuum dry the product. When the support plate 6 and tray 13 are completely retracted into the chamber 1, the support plate 6 drives gear 15 to move backward until it meshes with rack 17. During the vacuum drying process, motor 8 drives screw 9 to rotate back and forth at small angles. Screw 9, in turn, drives support plate 6, gear 15, and tray 13 to move back and forth slightly through nut 11, thereby causing rack 17 to move back and forth. The action is applied to gear 15, which drives gear 15 and rotating seat 14 to rotate clockwise and counterclockwise. When rotating seat 14 rotates clockwise, mounting shaft 12 does not rotate with rotating seat 14. When rotating seat 14 rotates counterclockwise, it drives mounting shaft 12 to rotate counterclockwise synchronously through the first ratchet mechanism. Thus, during the small back-and-forth reciprocating motion of bearing plate 6 and tray 13, mounting shaft 12 drives tray 13 to rotate counterclockwise periodically. Tray 13 drives the product to be dried to rotate slowly inside the box 1, making the product in tray 13 more evenly heated and improving the drying efficiency of the product.

[0035] like Figures 5 to 7 As shown, the first ratchet mechanism includes a circular groove 18 located at the bottom of the rotating seat 14. The circular groove 18 is coaxially arranged with the mounting shaft 12. The inner wall of the circular groove 18 is provided with a plurality of first ratchet teeth 19 evenly spaced circumferentially. The lower end of the mounting shaft 12 extends into the circular groove 18 and is fixedly mounted with a circular mounting seat 20. The mounting seat 20 is fixedly connected to the mounting shaft 12 by bolts, or the center of the mounting seat 20 is provided with a shaft hole, and the shaft hole is interference-fitted with the mounting shaft 12.

[0036] The outer circumferential surface of the mounting base 20 is provided with an annular groove 21. A pawl 22 matching the first ratchet 19 is provided in the annular groove 21. A vertically extending pin 23 is embedded in the annular groove 21. The pawl 22 is rotatably connected to the pin 23. A spring piece 24 for engaging the pawl 22 with the first ratchet 19 is also provided in the annular groove 21. One end of the spring piece 24 is fixedly connected to the inside of the annular groove 21 by a screw, and the other end elastically abuts against the first ratchet 19.

[0037] Specifically, when gear 15 moves forward relative to rack 17, rack 17 drives gear 15 and rotating seat 14 to rotate clockwise. Rotating seat 14 drives first ratchet 19 to rotate clockwise relative to pawl 22. Pawl 22 slides over multiple first ratchet 19s. Mounting seat 20 and mounting shaft 12 do not rotate synchronously with rotating seat 14. When gear 15 moves backward relative to rack 17, rack 17 drives gear 15 and rotating seat 14 to rotate counterclockwise. Rotating seat 14 drives first ratchet 19 to rotate counterclockwise relative to pawl 22. One end of pawl 22 inserts between two adjacent first ratchet 19s, thereby causing mounting seat 20 and mounting shaft 12 to rotate counterclockwise synchronously with rotating seat 14.

[0038] A second ratchet mechanism is also provided between the support plate 6 and the tray 13 to prevent the mounting shaft 12 and the tray 13 from reversing, such as Figure 8 As shown, the second ratchet mechanism includes a ratchet disc 25 bolted to the top of the support plate 6. The ratchet disc 25 is annular and coaxially arranged with the mounting shaft 12. Multiple second ratchet teeth 26 are evenly spaced circumferentially on the top of the ratchet disc 25. An elastic plate 27 is provided at the bottom of the tray 13. One end of the elastic plate 27 is fixed to the bottom of the tray 13 with screws, and the other end of the elastic plate 27 elastically fits against the top of the ratchet disc 25 and extends between two adjacent second ratchet teeth 26. Specifically, when the rotating seat 14 drives the mounting shaft 12 and the tray 13 to rotate counterclockwise, the tray 13 causes one end of the elastic plate 27 to slide over the top of the multiple second ratchet teeth 26. When the mounting shaft 12 and the tray 13 lose power, one end of the elastic plate 27 extends between two adjacent second ratchet teeth 26, thereby preventing the mounting shaft 12 and the tray 13 from rotating clockwise.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying oven for purifying silicon carbide blanks, characterized in that: The device includes a housing with a hinged door on its front side. Two opposing support plates are fixedly installed inside the housing. A load-bearing plate, driven by a power mechanism, moves back and forth between the two support plates. A vertically extending mounting shaft is rotatably mounted on the load-bearing plate, and a tray is fixedly mounted on the upper end of the mounting shaft. A rotating seat is rotatably fitted around the mounting shaft, and a gear coaxial with the mounting shaft is mounted on the rotating seat. A rack meshing with the gear is fixedly installed inside the housing. A first ratchet mechanism is provided between the rotating seat and the mounting shaft. When the rotating seat rotates clockwise or counterclockwise, the first ratchet mechanism drives the mounting shaft to rotate synchronously.

2. The vacuum drying oven for purifying silicon carbide blanks as described in claim 1, characterized in that: The first ratchet mechanism includes a circular groove located at the bottom of the rotating seat. The circular groove is coaxially arranged with the mounting shaft. A plurality of first ratchet teeth are evenly spaced circumferentially on the inner wall of the circular groove. The lower end of the mounting shaft extends into the circular groove and is fixedly mounted on a mounting seat. A pawl matching the first ratchet teeth is mounted on the mounting seat.

3. The vacuum drying oven for purifying silicon carbide blanks as described in claim 1, characterized in that: A second ratchet mechanism for preventing the mounting shaft from reversing is also provided between the support plate and the tray. The second ratchet mechanism includes an annular ratchet disc fixedly mounted on the support plate. The top of the ratchet disc is provided with a plurality of second ratchet teeth evenly spaced around its circumference. The bottom of the tray is provided with an elastic plate. One end of the elastic plate is fixedly mounted on the bottom of the tray, and the other end of the elastic plate elastically fits against the top of the ratchet disc and extends between two adjacent second ratchet teeth.

4. The vacuum drying oven for purifying silicon carbide blanks as described in claim 1, characterized in that: Heating tubes are installed on the left and right side walls of the box respectively; a vacuum pump is installed on the top of the box, and the suction end of the vacuum pump extends into the box.

5. The vacuum drying oven for purifying silicon carbide blanks as described in claim 1, characterized in that: The support plate has multiple ventilation holes evenly distributed on it.

6. The vacuum drying oven for purifying silicon carbide blanks as described in claim 1, characterized in that: The inner sides of the two support plates are fixedly installed with left and right opposite slide rails, and the bearing plate is slidably installed in the two left and right opposite slide rails; the power mechanism includes a lead screw driven by a motor to rotate, the lead screw extends along the length direction of the slide rail, and a lead screw nut that matches the lead screw is fixedly installed on the bearing plate.

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