A bracket device for silicon carbide product sintering furnace

Abstract

The invention relates to the field of ceramic production and processing devices, and specifically to a bracket device for a silicon carbide product sintering furnace, comprising a mounting plate, a plurality of bracket tubes rotatably arranged at the front of the mounting plate, a closing plate connected to the front of the bracket tube via a disassembly mechanism, the bracket device also comprising a heat conduction mechanism for uniformly heating a tubular silicon carbide blank, the invention adopts a plurality of bracket tubes to support the tubular silicon carbide blank, the bracket tube will not block the outer side of the tubular silicon carbide blank, which is beneficial to heat transfer during the sintering process and improves the sintering uniformity, the invention adopts a locking assembly to connect the closing plate and the bracket tube together, so that the closing plate can support the front side of the bracket tube, and the bracket tube can be displaced to contact the tubular silicon carbide blank before each sintering, so as to prevent the tubular silicon carbide product from always causing wear to one position of the bracket tube, thereby extending the service life of the bracket tube.

Description

Technical Field

[0001] The invention relates to the field of ceramic production and processing devices, in particular to a bracket device for a silicon carbide product sintering furnace. Background Art

[0002] The bracket for silicon carbide product sintering furnace is a supporting device used to place silicon carbide products during the silicon carbide sintering process. The shape of the bracket is usually designed according to the shape of the silicon carbide product and the internal structure of the sintering furnace. Tubular silicon carbide products are usually placed on a flat bracket with a U-shaped groove.

[0003] Before sintering, the operator places the tubular silicon carbide blanks one by one inside the U-shaped groove of the bracket. The tubular silicon carbide blanks come into contact with the bottom of the U-shaped groove under the action of gravity, so that the bracket supports and limits the tubular silicon carbide blanks through the U-shaped groove. The bracket is then sent into the sintering furnace to process the tubular silicon carbide blanks.

[0004] However, since the bracket is used repeatedly in a high temperature environment and the bottom of the U-shaped groove is always in contact with the tubular silicon carbide, the bottom of the U-shaped groove of the bracket is often worn, resulting in a reduction in the supporting strength of the bracket, which in turn affects the service life of the bracket. In addition, when the tubular silicon carbide blank is supported and limited by a flat bracket with a U-shaped groove, the bracket blocks a lot of the outer side of the tubular silicon carbide blank, which is not conducive to heat transfer during the sintering process, thereby affecting the sintering uniformity of the tubular silicon carbide blank, thereby reducing the final product quality. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a bracket device for a silicon carbide product sintering furnace, comprising a mounting plate, a plurality of bracket tubes are rotatably arranged at the front of the mounting plate, and a closing plate is connected to the front of the bracket tubes through a disassembly mechanism. The bracket device also includes a heat conduction mechanism for uniformly heating the tubular silicon carbide blank.

[0006] The disassembly mechanism includes a plug post fixedly installed on the rear side of the closing plate, the position of the plug post corresponds to the bracket tube one by one, the outer diameter of the plug post is equal to the inner diameter of the bracket tube, and through holes corresponding to the bracket tubes are opened on the front and back of the mounting plate, and the through holes are stepped with the inner diameter being larger at the front and smaller at the back, and the rear part of the bracket tube is rotatably connected to the inside of the through hole. The disassembly mechanism also includes a locking assembly, which drives the bracket tube to rotate during the process of connecting and locking the closing plate and the bracket tube together.

[0007] The heat conduction mechanism includes a plurality of groups of ventilation holes which are evenly spaced along the circumference of the bracket tube, each group consisting of a plurality of ventilation holes which are evenly spaced along the front-to-back direction on the bracket tube, a C-shaped arc shield is fixedly installed on the front side of the through hole, and the outer arc surface of the arc shield is attached to the inner side surface of the bracket tube, and the heat conduction mechanism also includes a flow guide component which guides the hot air flow inside the sintering furnace into the inside of the bracket tube.

[0008] Preferably, the rear side of the plug post is a conical structure, and the front edge of the arc-shaped shield plate is provided with a chamfer that matches the conical structure of the plug post. When the plug post is fully inserted into the bracket tube at the corresponding position, the conical structure of the plug post fits together with the chamfer of the arc-shaped shield plate.

[0009] Preferably, the number of groups of ventilation holes is an odd number greater than three, the opening side of the C-shaped structure of the arc-shaped shield plate faces vertically downward, and a plurality of groups of arc-shaped grooves are provided on the arc-shaped shield plate to penetrate the inside and outside of the arc-shaped shield plate, and each group is composed of arc-shaped grooves that are equally spaced along the front-to-back direction and symmetrical on the left and right, and the number and arc length of arc-shaped grooves in different groups are different.

[0010] Preferably, the locking assembly includes follower plates fixedly installed on the outer front part of the bracket tube at equal intervals along the circumference of the bracket tube, the number of follower plates on the same bracket tube is the same as the number of groups of vent holes thereon, an insertion hole is provided on the follower plate near the axis of the bracket tube, a sliding plate corresponding to the bracket tube is provided on the rear side of the closing plate for sliding up and down, and an insertion rod is fixedly installed on the lower right side of the sliding plate.

[0011] Preferably, the lower part of the insertion rod is in a dome structure, a chamfer is provided on the edge of the vent hole on the side opposite to the rotation direction of the bracket tube, a linkage frame is provided on the front side of the closing plate for sliding up and down, and the linkage frame is fixedly connected to all the sliding plates.

[0012] Preferably, a toggle rod is fixedly installed on the upper cylindrical surface of the plug column, and arc plates with a right-angled trapezoidal structure are fixedly installed on the inner front part of the bracket tube at equal intervals along its circumference. The number of arc plates is the same as the number of groups of vents, and the spacing between two adjacent arc plates is not less than the outer diameter of the toggle rod.

[0013] Preferably, the guide assembly includes fixed square tubes fixedly mounted at the four corners of the mounting plate, a collecting cover is fixedly mounted at the rear of the mounting plate, and air intake slots are provided on the fixed square tubes at equal intervals along the front-to-rear direction at positions away from the center of the mounting plate.

[0014] Preferably, an air guide is fixedly mounted on the air inlet slot of the fixed square tube, the air guide is in a funnel-shaped structure, and the portion of the air guide located inside the fixed square tube has a small diameter and is arranged toward the rear.

[0015] Preferably, blocking blocks corresponding to the fixed square tubes are fixedly installed at the four corners of the closing plate, and the blocking blocks are in a stepped rectangular structure with longer sides in the front and shorter sides in the back, and the length of the rear side of the blocking blocks is equal to the length of the inner side of the fixed square tube.

[0016] Preferably, the bracket tubes are arranged on the closing plate in a staggered rectangular shape.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention adopts a plurality of support tubes to support the tubular silicon carbide blank. Before sintering, the operator inserts the tubular silicon carbide blank into the outer side of the support tube, so that the tubular silicon carbide blank rests against the upper part of the outer side surface of the support tube under the action of gravity, so that the support tube will not block the outer side surface of the tubular silicon carbide blank, which is beneficial to the heat transfer during the sintering process, improves the sintering uniformity, and ensures the final product quality.

[0018] Second, the present invention adopts a locking assembly to connect the closing plate and the bracket tube together, so that the closing plate supports the front side of the bracket tube to prevent the bracket tube from tilting during the sintering process and prevent the tubular silicon carbide blank from sliding on the bracket tube and causing wear. At the same time, the bracket tube can be rotated to a certain angle so that the bracket tube can be exchanged and contacted with the tubular silicon carbide blank before each sintering, thereby preventing the tubular silicon carbide product from always causing wear to one position of the bracket tube, thereby extending the service life of the bracket tube.

[0019] 3. The present invention adopts a guide component to guide the hot air flow inside the sintering furnace to the inside of the bracket tube, and then the hot air flow is blown to the inner side of the tubular silicon carbide blank through the vents on the bracket tube, thereby heating the inner side of the tubular silicon carbide blank, so that the outer side and the inner side of the tubular silicon carbide blank are heated at the same time, thereby improving the sintering efficiency and further increasing the uniformity of sintering.

[0020] Fourth, the present invention adopts an arc-shaped shield plate to block the vents on the bracket tube, so that a larger number of vents on the inner side surface of the tubular silicon carbide blank at a position farther from the bracket tube are not blocked by the arc-shaped shield plate, and a larger number of vents on the inner side surface of the tubular silicon carbide blank at a position closer to the bracket tube are blocked by the arc-shaped shield plate, thereby spraying more hot air flow onto the inner side surface of the tubular silicon carbide blank at a position farther from the bracket tube, so that the inner side surface of the tubular silicon carbide blank is heated evenly, thereby further increasing the uniformity of sintering.

[0021] 5. The present invention uses an air guide to converge the hot air flow through its funnel-shaped structure. When the hot air flow moves along the air guide to the inside of the fixed square tube, the inner diameter of the air guide gradually decreases, so that the flow rate of the hot air flow gradually increases, so that the hot air flow can quickly move through the fixed square tube to the inside of the bracket tube, so that the inner and outer sides of the tubular silicon carbide blank can be heated synchronously, further increasing the uniformity of sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a first structural schematic diagram of the present invention in a sintering furnace.

[0024] Figure 2 It is a second structural schematic diagram of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the mounting plate, the bracket tube, the vent hole, the through hole, the arc shield plate, the follower plate, the insertion hole and the arc plate in the present invention.

[0026] Figure 4 It is a cross-sectional view of the mounting plate, bracket tube, arc shield, arc groove and through hole in the present invention.

[0027] Figure 5 It is a structural schematic diagram of the closing plate, the plug column, the bracket tube, the locking assembly, the arc shield and the blocking block in the present invention.

[0028] Figure 6 It is a structural schematic diagram of the sliding plate, the insertion rod and the linkage frame in the present invention.

[0029] Figure 7 It is a partial structural schematic diagram of the follower plate, the insertion hole, the insertion rod, the arc plate, the bracket tube and the insertion column in the present invention.

[0030] Figure 8 It is a partial cross-sectional view of the arc shield, the plug post, the toggle rod and the arc plate in the present invention.

[0031] Fig. 9 It is a cross-sectional view of the mounting plate, through hole and flow guide assembly in the present invention.

[0032] Fig.10 It is a partial cross-sectional view of the fixed square tube and the air guide member in the present invention.

[0033] In the figure: 1. mounting plate; 2. bracket tube; 3. disassembly mechanism; 4. heat conduction mechanism; 5. closing plate; 31. plug column; 32. through hole; 33. locking assembly; 41. vent hole; 42. arc shield; 43. flow guide assembly; 331. follower plate; 332. insertion hole; 333. sliding plate; 334. insertion rod; 335. linkage frame; 336. toggle rod; 337. arc plate; 421. arc groove; 431. fixed square tube; 432. collecting cover; 433. air guide; 434. blocking block. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product specifications are used.

[0035] See also Figure 1 and Figure 2 A bracket device for a silicon carbide product sintering furnace includes a mounting plate 1, a plurality of bracket tubes 2 are rotatably arranged at the front of the mounting plate 1, a closing plate 5 is connected to the front of the bracket tube 2 through a disassembly mechanism 3, and the bracket device also includes a heat conduction mechanism 4 for uniformly heating the tubular silicon carbide blank.

[0036] When the tubular silicon carbide blank needs to be sintered, the operator first separates the closing plate 5 from the bracket tube 2, and then inserts the tubular silicon carbide blank from front to back into the outside of each bracket tube 2, so that the tubular silicon carbide blank naturally droops under the action of gravity, so that the upper part of the inner side surface of the tubular silicon carbide blank contacts the upper part of the outer side surface of the bracket tube 2, and then the bracket tube 2 supports and limits the tubular silicon carbide blank, and then the closing plate 5 is connected to the front end of the bracket tube 2 through the disassembly mechanism 3.

[0037] Then the operator delivers the tubular silicon carbide blank into the interior of the sintering furnace through the device, and then heats the tubular silicon carbide blank through the sintering furnace. While the sintering furnace directly heats the outer side of the tubular silicon carbide blank, the heat conduction mechanism 4 conducts the hot air inside the sintering furnace to the inner side of the tubular silicon carbide blank through the bracket tube 2, so that the inner and outer sides of the tubular silicon carbide blank are heated synchronously.

[0038] See also Figure 2 , Figure 3 and Figure 5 The disassembly mechanism 3 includes a plug post 31 fixedly installed on the rear side of the closing plate 5, the plug post 31 corresponds to the position of the bracket tube 2 one by one, the outer diameter of the plug post 31 is equal to the inner diameter of the bracket tube 2, and the mounting plate 1 is provided with through holes 32 that correspond to the bracket tube 2 one by one at the front and back. The through holes 32 are stepped with the inner diameter being larger at the front and smaller at the back. The rear part of the bracket tube 2 is rotatably connected to the inside of the through holes 32. The disassembly mechanism 3 also includes a locking assembly 33, which drives the bracket tube 2 to rotate in the process of connecting and locking the closing plate 5 and the bracket tube 2 together.

[0039] See also Figure 1 , Figure 3 , Figure 4 and Figure 5The heat conduction mechanism 4 includes a plurality of groups of ventilation holes 41 which are evenly spaced along the circumference of the bracket tube 2, and each group is composed of a plurality of ventilation holes 41 which are evenly spaced along the front-to-back direction on the bracket tube 2. A C-shaped arc shield plate 42 is fixedly installed on the front side of the through hole 32, and the outer arc surface of the arc shield plate 42 is attached to the inner side surface of the bracket tube 2.

[0040] See also Figure 2 , Figure 5 , Figure 6 and Figure 7 The locking assembly 33 includes follower plates 331 fixedly installed on the front outer side of the bracket tube 2 at equal intervals along the circumference of the bracket tube 2. The number of follower plates 331 on the same bracket tube 2 is the same as the number of groups of vent holes 41 thereon. An insertion hole 332 is provided on the follower plate 331 near the axis of the bracket tube 2. A sliding plate 333 corresponding to the bracket tube 2 is provided on the rear side of the closing plate 5 for sliding up and down. An insertion rod 334 is fixedly installed on the lower right side of the sliding plate 333.

[0041] See also Figure 3 , Figure 5 , Figure 7 and Figure 8 A toggle rod 336 is fixedly installed on the upper cylindrical surface of the plug column 31, and arc plates 337 with a right-angled trapezoidal structure are fixedly installed at equal intervals along the circumference of the inner front part of the bracket tube 2. The number of arc plates 337 is the same as the number of groups of vent holes 41, and the distance between two adjacent arc plates 337 is not less than the outer diameter of the toggle rod 336.

[0042] When the bracket tube 2 is connected to the closing plate 5, the insertion column 31 is inserted into the inner front side of the bracket tube 2 at the corresponding position, and the insertion rod 334 is inserted downward into the insertion hole 332 at the corresponding position under the action of gravity, so that the bracket tube 2 is connected to the closing plate 5 as a whole through the follower plate 331 and the insertion rod 334, and the insertion rod 334 is inserted into the inside of the insertion hole 332, which can also lock the rotation angle of the bracket tube 2.

[0043] At this time, a group of ventilation holes 41 of the bracket tube 2 are vertically downward, and the non-vent holes 41 on the bracket tube 2 are vertically upward to prevent the bracket tube 2 from contacting the tubular silicon carbide blank through the ventilation holes 41 thereon. At the same time, the bracket tube 2 drives the inclined surface of the right-angled trapezoidal structure of the arc plate 337 corresponding to the position of the toggle rod 336 thereon to correspond to the toggle rod 336.

[0044] See also Figure 1 and Figure 6 A linkage frame 335 is provided on the front side of the closing plate 5 for sliding up and down, and the linkage frame 335 is fixedly connected to all the sliding plate members 333 .

[0045] When the tubular silicon carbide blank needs to be placed on the outside of the bracket tube 2, the operator manually lifts up the linkage frame 335, and the linkage frame 335 drives all the sliding plates 333 to move upward synchronously, so that the sliding plate 333 drives the insertion rod 334 to move upward to the exit insertion hole 332, so that the rotation angle of the bracket tube 2 is no longer restricted, and then the operator moves the closing plate 5 forward, and the closing plate 5 drives the insertion column 31 to move forward and exit from the inside of the bracket tube 2.

[0046] The plug post 31 drives the toggle rod 336 thereon to move synchronously, so that the toggle rod 336 contacts the inclined surface of the right-angled trapezoidal structure of the arc plate 337 at the corresponding position, and then the toggle rod 336 moves along the inclined surface of the arc plate 337 at the corresponding position, so that the toggle rod 336 drives the bracket tube 2 to rotate by pushing the inclined surface of the arc plate 337. When the bracket tube 2 rotates to the position where the gap between two adjacent arc plates 337 thereon corresponds to the position of the toggle rod 336, the toggle rod 336 no longer drives the bracket tube 2 to rotate, and moves from the gap between the two adjacent arc plates 337 to the front side of the bracket tube 2, thereby separating the closing plate 5 from the bracket tube 2.

[0047] At this time, the bracket tube 2 drives the follower plate 331 thereon to rotate half of the angle between two adjacent follower plates 331, and then the operator inserts the tubular silicon carbide blank from front to back and sleeves it on the outside of the bracket tube 2, so that the bracket tube 2 supports and limits the tubular silicon carbide blank, and then the operator moves the closing plate 5 backward so that the closing plate 5 is connected to the bracket tube 2 again.

[0048] See also Figure 5 and Figure 8 The rear side of the plug post 31 has a conical structure, and the front edge of the arc-shaped shielding plate 42 is provided with a chamfer that matches the conical structure of the plug post 31. When the plug post 31 is fully inserted into the bracket tube 2 at the corresponding position, the conical structure of the plug post 31 fits together with the chamfer of the arc-shaped shielding plate 42.

[0049] When the closing plate 5 is connected to the bracket tube 2 again, the plug post 31 is inserted into the front side of the bracket tube 2 again, and the plug post 31 can be guided by the tapered structure on its rear side so that the plug post 31 can be quickly aligned into the bracket tube 2. When the tapered structure of the plug post 31 fits together with the chamfer of the arc-shaped shield plate 42, the plug post 31 supports the bracket tube 2. At the same time, the plug post 31 can also support the front end of the arc-shaped shield plate 42 through its tapered structure, thereby preventing the bracket tube 2 and the arc-shaped shield plate 42 from tilting downward at the front under high temperature.

[0050] See also Figure 5 , Figure 6 and Figure 7 The lower part of the insertion rod 334 is in a dome structure, and a chamfer is provided on the edge of the vent hole 41 on the side opposite to the rotation direction of the bracket tube 2.

[0051] When the insertion column 31 is fully inserted into the bracket tube 2 at the corresponding position, the operator removes the external force on the linkage frame 335, so that the linkage frame 335 moves downward under the action of gravity, so that all the insertion rods 334 move downward synchronously to abut against the follower plate 331 at the corresponding position, and then the insertion rod 334 pushes the follower plate 331 through the dome structure at the bottom, and the follower plate 331 drives the bracket tube 2 to rotate until the follower plate 331 rotates to the insertion hole 332 thereon and is aligned to the bottom of the insertion rod 334, and then the insertion rod 334 is inserted into the insertion hole 332 again, so that the closing plate 5 is connected to the bracket tube 2 again.

[0052] When the insertion rod 334 is inserted into the insertion hole 332 again, the bracket tube 2 rotates in the same direction by the angle between two adjacent follower plates 331 relative to the last time it was connected to the closing plate 5. At this time, the bracket tube 2 replaces another adjacent group of vent holes 41 to face vertically downward, and replaces the position of another non-vent hole 41 to face upward, so that the bracket tube 2 can rotate a fixed angle each time it supports the tubular silicon carbide blank, thereby continuously changing the position in contact with the tubular silicon carbide blank, thereby making full use of the bracket tube 2 and increasing the service life of the bracket tube 2.

[0053] See also Figure 3 , Figure 4 and Figure 5 The number of groups of the vent holes 41 is an odd number greater than three, the opening side of the C-shaped structure of the arc shield plate 42 is vertically downward, and a plurality of groups of arc grooves 421 are provided on the arc shield plate 42 to penetrate the inside and outside of the arc shield plate 42, each group is composed of arc grooves 421 that are arranged at equal intervals along the front-to-back direction and are symmetrical on the left and right, and the number of groups of the arc grooves 421 is the number of groups of the vent holes 41 minus one and divided by two, and the arc lengths of the arc grooves 421 of different groups are different, and the number of the arc grooves 421 in different groups is also different, wherein the longer the arc length of the arc groove 421, the fewer the number of the arc grooves 421 in the corresponding group.

[0054] When the rotation angle of the bracket tube 2 is locked by the insertion rod 334, a group of vent holes 41 on the bracket tube 2 pointing vertically downward corresponds to the position of the opening side of the C-shaped structure of the arc-shaped shield plate 42, so that the group of vent holes 41 pointing vertically downward is not blocked by the arc-shaped shield plate 42, and the arc-shaped shield plate 42 avoids the groups of vent holes 41 except the group of vent holes 41 arranged vertically through the arc-shaped groove 421 thereon, so that the vent holes 41 can connect the inside and outside of the bracket tube 2.

[0055] Since the number of arc grooves 421 is smaller as the arc length is longer, the number of each group of vent holes 41 opened by the arc shielding plate 42 from bottom to top becomes smaller and smaller, thereby gradually reducing the area of ​​the support tube 2 connecting the inner and outer sides from bottom to top, and further, the closer the support tube 2 is to the inner side surface of the tubular silicon carbide blank, the fewer the number of vent holes 41 not shielded by the arc shielding plate 42.

[0056] See also Figure 1 , Figure 2 , Figure 5 and Fig. 9 The heat conduction mechanism 4 also includes a flow guide component 43 for guiding the hot air flow inside the sintering furnace into the bracket tube 2. The flow guide component 43 includes a fixed square tube 431 fixedly installed at the four corners of the mounting plate 1. A collecting cover 432 is fixedly installed at the rear of the mounting plate 1. The fixed square tube 431 is provided with air intake slots at equal intervals along the front-to-back direction at a position away from the center of the mounting plate 1.

[0057] See also Figure 5 , Fig. 9 and Fig.10 An air guide 433 is fixedly installed on the air inlet slot of the fixed square tube 431. The air guide 433 has a funnel-shaped structure. The part of the air guide 433 located inside the fixed square tube 431 has a small diameter and is arranged toward the rear. Blocks 434 corresponding to the fixed square tube 431 are fixedly installed at the four corners of the closing plate 5. The block 434 has a stepped rectangular structure with longer sides in the front and shorter sides in the back. The length of the rear side of the block 434 is equal to the length of the inner side of the fixed square tube 431.

[0058] When the closing plate 5 is connected to the bracket tube 2, the closing plate 5 drives the rear side of the blocking block 434 thereon to be inserted into the interior of the fixed square tube 431 at the corresponding position, so that the front end of the fixed square tube 431 is closed. When the rotation angle of the bracket tube 2 is locked by the insertion rod 334, the mounting plate 1, the bracket tube 2, and the closing plate 5 are locked into a whole. Then the operator moves the mounting plate 1, the bracket tube 2, and the closing plate 5 to the interior of the sintering furnace, and then the sintering furnace can be started to process the tubular silicon carbide blank.

[0059] See also Figure 1 , Figure 2 and Figure 3 The bracket tubes 2 are arranged on the closing plate 5 in a staggered rectangular form.

[0060] When the sintering furnace processes the tubular silicon carbide blank, the high-temperature gas in the sintering furnace flows to the outer side of the tubular silicon carbide blank outside the bracket tube 2, causing the outer side of the tubular silicon carbide blank to begin to heat up, and the outer side of the tubular silicon carbide blank arranged synchronously with the bracket tube 2 can also rebound the high-temperature gas, causing the high-temperature gas to flow quickly to the outer side of other tubular silicon carbide blanks, increasing the conduction speed of the high-temperature airflow, thereby increasing the uniformity of the sintering process.

[0061] At the same time, the high-temperature gas in the sintering furnace passes through the air guide 433 on the fixed square tube 431 and flows to the inside of the fixed square tube 431, and the air guide 433 can converge the hot air flow through its funnel-shaped structure, and the inner diameter of the air guide 433 gradually decreases, so that the flow rate of the hot air flow gradually increases, so that the hot air flow can move quickly to the rear of the fixed square tube 431, so that the hot air flow moves and converges inside the collecting cover 432, and then the hot air flow inside the collecting cover 432 passes through the through hole 32 and moves evenly to the inside of each bracket tube 2.

[0062] Then the hot air flow inside the bracket tube 2 flows to the inner side of the tubular silicon carbide blank through the air vents 41 thereon, so that the inner and outer sides of the tubular silicon carbide blank are heated synchronously, thereby further increasing the uniformity of sintering. Moreover, since the closer the bracket tube 2 is to the inner side of the tubular silicon carbide blank, the fewer the air vents 41 not shielded by the arc-shaped shielding plate 42 are, the amount of hot air flow sprayed toward the part of the inner side of the tubular silicon carbide blank away from the bracket tube 2 is larger, and the amount of hot air flow sprayed toward the part of the inner side of the tubular silicon carbide blank close to the bracket tube 2 gradually decreases, thereby making the inner side of the tubular silicon carbide blank heated evenly, further increasing the uniformity of sintering.

[0063] See also Figure 1-Figure 10 When sintering the tubular silicon carbide blank, the present invention also includes the following steps: In the first step, the operator manually lifts up the linkage frame 335 to drive the insertion rod 334 to move upward to the inside of the exit insertion hole 332, and then the operator moves the closing plate 5 forward, and the closing plate 5 drives the insertion column 31 to move forward and exit from the inside of the bracket tube 2, and the toggle rod 336 drives the bracket tube 2 to rotate half of the angle between two adjacent follower plates 331.

[0064] In the second step, the operator inserts the tubular silicon carbide blank from front to back and sleeves it on the outside of the bracket tube 2, so that the bracket tube 2 supports and limits the tubular silicon carbide blank. Then the operator moves the closing plate 5 backward to insert the column 31 into the front side of the bracket tube 2, so that the column 31 supports the front end of the bracket tube 2 and the arc-shaped shield plate 42.

[0065] In the third step, the operator removes the external force on the linkage frame 335, so that the insertion rod 334 moves downward to push the follower plate 331, and the follower plate 331 drives the bracket tube 2 to rotate until the insertion rod 334 is inserted into the insertion hole 332 again, so that the closing plate 5 is connected to the bracket tube 2 again, thereby rotating the bracket tube 2 in the same direction by the angle between two adjacent follower plates 331.

[0066] In the fourth step, the operator moves the mounting plate 1, the bracket tube 2, and the closing plate 5 to the inside of the sintering furnace, and then starts the sintering furnace to process the tubular silicon carbide blank. The high-temperature gas in the sintering furnace rebounds through the outer side of the tubular silicon carbide blank, which increases the conduction speed of the high-temperature airflow and thereby increases the uniformity of the sintering process.

[0067] In the fifth step, the high-temperature gas in the sintering furnace flows to the interior of the fixed square tube 431 through the gas guide 433, and then the hot air flow quickly moves to the rear of the fixed square tube 431 and gathers inside the collecting cover 432. Then, the hot air flow inside the collecting cover 432 passes through the through hole 32 and moves evenly to the interior of each bracket tube 2.

[0068] In the sixth step, the internal hot air flow of the bracket tube 2 flows to the inner side of the tubular silicon carbide blank through the vent holes 41 thereon in unequal amounts, so that the inner and outer sides of the tubular silicon carbide blank are heated synchronously, thereby further increasing the uniformity of sintering.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A bracket device for a silicon carbide product sintering furnace, characterized in that: It comprises a mounting plate (1), a plurality of bracket tubes (2) are rotatably arranged at the front of the mounting plate (1), the front of the bracket tubes (2) are connected to a closing plate (5) via a disassembly mechanism (3), and the bracket device further comprises a heat conduction mechanism (4) for uniformly heating the tubular silicon carbide blank; The disassembly mechanism (3) comprises a plug post (31) fixedly mounted on the rear side of the closing plate (5), the plug post (31) and the bracket tube (2) having a one-to-one correspondence in position, the outer diameter of the plug post (31) being equal to the inner diameter of the bracket tube (2), and a through hole (32) corresponding to the bracket tube (2) being formed through the front and rear of the mounting plate (1), the through hole (32) being in a stepped shape with an inner diameter larger at the front and smaller at the rear, the rear of the bracket tube (2) being rotatably connected to the inside of the through hole (32), and the disassembly mechanism (3) further comprises a locking assembly (33), which drives the bracket tube (2) to rotate in the process of connecting and locking the closing plate (5) and the bracket tube (2) together; The heat conduction mechanism (4) comprises a plurality of groups of vent holes (41) which are evenly spaced along the circumference of the bracket tube (2), each group being composed of a plurality of vent holes (41) which are evenly spaced along the front-rear direction on the bracket tube (2), a C-shaped arc shield plate (42) being fixedly mounted on the front side of the through hole (32), the outer arc surface of the arc shield plate (42) being fitted on the inner side surface of the bracket tube (2), and the heat conduction mechanism (4) also comprises a flow guide component (43) which guides the hot air flow inside the sintering furnace into the inside of the bracket tube (2).

2. A bracket device for a silicon carbide product sintering furnace according to claim 1, characterized in that: The rear side of the plug post (31) is in a conical structure, and the front edge of the arc-shaped shielding plate (42) is provided with a chamfer that matches the conical structure of the plug post (31). When the plug post (31) is fully inserted into the interior of the bracket tube (2) at a corresponding position, the conical structure of the plug post (31) fits together with the chamfer of the arc-shaped shielding plate (42).

3. The bracket device for a silicon carbide product sintering furnace according to claim 1, characterized in that: The number of groups of the vent holes (41) is an odd number greater than three. The opening side of the C-shaped structure of the arc shield (42) is vertically downward. The arc shield (42) is provided with a plurality of groups of arc grooves (421) penetrating the inside and outside of the arc shield. Each group is composed of arc grooves (421) that are arranged at equal intervals in the front-to-back direction and are symmetrical on the left and right. The number and arc length of the arc grooves (421) in different groups are different.

4. The bracket device for a silicon carbide product sintering furnace according to claim 1, characterized in that: The locking assembly (33) comprises follower plates (331) fixedly mounted at an outer front portion of the bracket tube (2) at equal intervals along the circumference of the bracket tube (2); the number of follower plates (331) on the same bracket tube (2) is the same as the number of groups of vent holes (41) thereon; an insertion hole (332) is provided on the follower plate (331) at a position close to the axis of the bracket tube (2); a sliding plate member (333) corresponding to the bracket tube (2) is slidably mounted on the rear side of the closing plate (5) in an upward and downward manner; an insertion rod (334) is fixedly mounted on the lower right side of the sliding plate member (333).

5. A bracket device for a silicon carbide product sintering furnace according to claim 4, characterized in that: The lower part of the insertion rod (334) is in a dome structure, and a chamfer is provided at the edge of the vent hole (41) on the side opposite to the rotation direction of the bracket tube (2). A linkage frame (335) is provided on the front side of the closing plate (5) for sliding up and down, and the linkage frame (335) is fixedly connected to all the sliding plate members (333).

6. A bracket device for a silicon carbide product sintering furnace according to claim 4, characterized in that: A toggle rod (336) is fixedly mounted on the upper cylindrical surface of the plug post (31), and arc plates (337) in a right-angle trapezoidal structure are fixedly mounted at equal intervals along the circumference of the inner front portion of the bracket tube (2), the number of the arc plates (337) is the same as the number of groups of the vent holes (41), and the spacing between two adjacent arc plates (337) is not less than the outer diameter of the toggle rod (336).

7. The bracket device for a silicon carbide product sintering furnace according to claim 1, characterized in that: The flow guide assembly (43) comprises a fixed square tube (431) fixedly mounted at four corners of the mounting plate (1); a collecting cover (432) is fixedly mounted at the rear of the mounting plate (1); and air intake slots are provided at equal intervals along the front-to-rear direction at a position away from the center of the mounting plate (1) on the fixed square tube (431).

8. The bracket device for a silicon carbide product sintering furnace according to claim 7, characterized in that: An air guide (433) is fixedly mounted on the air inlet notch of the fixed square tube (431); the air guide (433) is in a funnel-shaped structure; the portion of the air guide (433) located inside the fixed square tube (431) is of a small diameter and is arranged toward the rear.

9. The bracket device for a silicon carbide product sintering furnace according to claim 7, characterized in that: Blocking blocks (434) corresponding to the fixed square tubes (431) are fixedly installed at the four corners of the closing plate (5); the blocking blocks (434) are in a stepped rectangular structure with longer sides at the front and shorter sides at the back; the length of the rear side of the blocking blocks (434) is equal to the length of the inner side of the fixed square tube (431).

10. The bracket device for a silicon carbide product sintering furnace according to claim 1, characterized in that: The bracket tubes (2) are arranged in a staggered rectangular shape on the closing plate (5).

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