A bell furnace

Abstract

A bell-shaped furnace comprises an upper furnace pier, a lower furnace pier, a lower furnace pier support plate, a lifting device, a guide column, an upper plate of a lifting frame, a lower plate of a lifting frame, an upper furnace pier mounting plate, a guide column guide seat, a column, a left half furnace body, a right half furnace body, a furnace body track, a furnace body mounting frame, and a lower furnace pier horizontal displacement mechanism. The furnace body mounting frame comprises a hanger, a wheel axle, and a roller. The upper end of the furnace body track is fixedly connected to the upper furnace pier mounting plate. The upper ends of the left half furnace body and the right half furnace body are fixedly connected to the lower end of the hanger, the upper ends of each hanger are fixedly connected to the corresponding wheel axle, the corresponding rollers are connected to the wheel axle together, and the rollers are rollingly supported on the furnace body guide rail. The lower furnace pier horizontal displacement mechanism comprises a guide rail, a roller mounting shaft, a mounting shaft connecting piece, and a bearing plate. The shaft rollers are rollingly supported on the guide rail. The lower pier plate at the lower end of the lower furnace pier is placed on the bearing plate. The bell-shaped furnace greatly reduces the lifting of the lifting platform and the height of the entire equipment, and the overall operation efficiency is high and the equipment maintenance is easier.

Description

Technical Field

[0001] The invention relates to sintering equipment, in particular to a bell furnace. Background Art

[0002] The bell furnace is a kind of equipment that is very suitable for the sintering production of superhard material products. The Chinese utility model patent document with application number 201920641142.4, authorization announcement number CN 210242363 U, and titled "A bell furnace with a movable firing platform" discloses a bell furnace: "It includes a furnace body, a support seat fixed at the bottom of the furnace body, a scissor-type hydraulic lifting platform fixedly installed at the center of the support seat, and a firing platform placed on the scissor-type hydraulic lifting platform and capable of cooperating with the furnace body inlet. The outer side of the lower end of the scissor-type hydraulic lifting platform is also provided with a return-shaped pressure plate, and the four corners of the bottom end of the return-shaped pressure plate are respectively rotatably installed with walking wheels and pulleys. The two sides of the bottom end of the support seat are also integrally formed with a mounting base that can extend to the rear side of the furnace body, and the mounting base is fixed with corresponding guide rails, and the pulley can be rolled and assembled on the corresponding guide rails. The distance between the walking wheel seat and the pulley seat on both sides is greater than the width of the scissor-type hydraulic lifting platform." However, it does not specify the lifting parameters of the scissor-type hydraulic lifting platform. In order to improve the suitability of workpieces, the lifting height of various lifting platforms of traditional bell furnaces generally exceeds 800 mm, which makes the operation very inconvenient and inefficient, and the overall height of the equipment is also too high. Summary of the invention

[0003] The main purpose of the present invention is to provide a bell-shaped furnace whose lifting height of a workpiece lifting platform is much lower than that of a traditional bell-shaped furnace.

[0004] The technical scheme used in the present invention is: a bell-shaped furnace, including an upper furnace pier, a lower furnace pier, a lower furnace pier support plate, a lifting device, a guide column, an upper lifting frame plate, a lower lifting frame plate, an upper furnace pier mounting plate, a guide column guide seat, and a column. It also includes a left half furnace body, a right half furnace body, a furnace body track, a furnace body mounting frame, and a lower furnace pier horizontal push mechanism. The furnace body mounting frame includes a hanger, a wheel axle, and a roller;

[0005] The front and rear furnace tracks are both horizontally oriented. The upper ends of the furnace tracks are respectively connected to the front and rear ends of the upper furnace mounting plate; the front and rear ends of the upper ends of the left and right furnace halves located below the furnace tracks are respectively connected to the lower ends of the front and rear hangers located on the left and right sides of the corresponding furnace tracks; the upper ends of the hangers are respectively connected to the corresponding axles, the corresponding rollers are connected to the axles, and the rollers are supported by rolling on the corresponding furnace tracks;

[0006] The horizontal push mechanism of the lower furnace pier includes two guide rails that are respectively arranged between the two left columns and guide columns and between the two right columns and guide columns, and roller mounting shafts are respectively located at the front and rear of the lower end of the lower furnace pier, and the left and right ends of the front and rear roller mounting shafts are respectively connected to a mounting shaft connecting piece that runs forward and backward, and the left and right ends of the bearing plate are respectively fixedly connected to the mounting shaft connecting piece. The roller shafts installed at the left and right ends of the roller mounting shaft are dynamically supported on the guide rails;

[0007] The lower furnace plate at the lower end of the lower furnace is placed on the load-bearing plate.

[0008] Here, the left and right furnace bodies can both move horizontally left and right, and the lower furnace body placed on the load-bearing plate can move forward and backward along with the structure connected to the load-bearing plate. When the left and right furnace bodies move toward each other in the left and right directions to the limit positions, the front and rear ends of the upper ends of the upper and lower ends of the left furnace body are respectively sealed and connected with the front and rear ends of the upper ends of the upper and lower ends of the right furnace body. The remaining parts of the upper ends of the right end of the left furnace body and the left end of the right furnace body are respectively sealed and connected with the upper ends of the left and right halves of the upper and lower furnace bodies, thereby enclosing the sintered material placed on the top of the lower furnace body for sintering operations;

[0009] When the left and right half furnace bodies move to the left and right extreme positions respectively, the sintered materials are lowered to the corresponding positions and pushed away horizontally to complete a sintering operation.

[0010] Here, the left and right furnace bodies are both provided with heating, heat preservation and sealing structures similar to those of the "integrated" furnace body. The present invention is different from the "integrated" furnace body of the prior art in that the furnace body of the present invention is divided into a left furnace body and a right furnace body that can move in opposite directions to the left and right. When needed, the left furnace body and the right furnace body can be moved to the required position in opposite directions to the left and right. Then, the lower furnace body with the object to be sintered placed on the top and located in front of the left and right furnace bodies is pushed backward into the sintering area by the horizontal push structure of the lower furnace body. Then, the left and right furnace bodies are moved to the left and right to form a sintering space after cooperating with the upper ends of the upper furnace body and the lower furnace body. Then, the corresponding sintering operation can be carried out. After the sintering operation is completed, the left and right half furnace bodies are first moved to the required positions in different directions, and then the lower furnace jar with the sintered objects is pulled forward from the sintering area by the lower furnace jar pushing structure to the front of the left and right half furnace bodies to unload the sintered objects. In the structure, there are four columns and four guide columns. The four columns are preferably distributed at the vertices of a square, and their lower ends are supported on the foundation to stably and reliably bear the weight of the upper furnace jar, the left half furnace body, the right half furnace body and other related components. The four guide columns are provided because when sintering certain sintered objects that need to be in the highest position are pushed to the lower end of the upper furnace wall to apply a certain force to the sintered objects, and a lifting device is needed to push the load-bearing plate to lift the lower furnace wall, the stability of the rising movement can be ensured. When the lower furnace wall rises under the lifting action of the lifting device, the shaft roller will also rise and break away from the contact with the upper surface of the corresponding front-to-back guide rail. After sintering is completed, the lifting device removes the lifting force, and the shaft roller will fall back to the upper surface of the front-to-back guide rail. In the next step, after the left and right half furnace bodies are moved away in different directions, the lower furnace wall can be pulled forward out of the interval defined by the left and right half furnace bodies to facilitate the operation of unloading the sintered objects from the lower furnace wall. The existing "integrated" bell-shaped furnace has an opening at the lower end of the sintering furnace body. The object to be sintered is first placed on the lower furnace pier located below the sintering furnace body, and then the lower furnace pier is lifted up by a corresponding lifting device to vertically lift the object to be sintered into the sintering furnace body. Therefore, the lifting stroke of the lifting device is relatively large [the stroke is generally greater than the height of the sintered object placed on the lower furnace pier plus the height of the lower end of the lower furnace pier entering the lower end of the sintering furnace body], so the lifting stroke of the lifting device often reaches about 800 mm. In this bell-shaped furnace, the sintered object placed on the lower furnace pier is pushed horizontally to the sintering work area. Compared with the prior art, a large lifting height of the lifting device is missing.When there is no need to pressurize the sintered object during sintering, the lifting device can be disabled; when a certain amount of force needs to be applied to the sintered object during the sintering process, the lifting device can be used to lift the load-bearing plate to lift the lower furnace and push the sintered object to the lower end of the upper furnace. Obviously, the lifting stroke required by the lifting device at this time is at least one less height of the sintered object than the lifting stroke required by the traditional bell furnace lifting device. Generally, the maximum lifting stroke of the lifting device required by the present invention is about 200 mm, which is equal to the sintering compression of the sintered workpiece. If there is no need to apply pressure to the sintered object during the sintering process, the lifting device can be omitted to save the processing and manufacturing cost of the present invention.

[0011] Preferably, the furnace track includes a track body 1 and a track body 2. The track body 1 and the track body 2 are arranged at intervals, the corresponding part of the hanger is located in the middle of the adjacent parts of the track body 1 and the track body 2, and the front and rear ends of each axle are respectively provided with a roller that is rollingly supported on the track body 1 and the track body 2. This preferred solution is easy to install and adjust.

[0012] As a preferred embodiment, the main body of the furnace track is in a "concave" shape, the upper ends of the front and rear side walls of the furnace track are fixedly connected to the upper furnace track mounting plate, and a groove running left and right is provided at the bottom of the furnace track. The upper end of the hanger is located between the front and rear side walls of the furnace track, and the front and rear ends of each axle are respectively provided with a roller that is rollingly supported on the corresponding part of the bottom of the furnace track. This preferred solution is conducive to improving the processing and manufacturing accuracy and installation efficiency.

[0013] Preferably, the wheel track and the upper furnace mounting plate are one body, and the corresponding parts of the front and rear ends of the upper furnace mounting plate are respectively provided with grooves running left and right. The upper end of the hanger is located at the upper end of the upper furnace mounting plate, and the front and rear ends of each wheel axle are respectively provided with a roller that is rollingly supported on the upper furnace mounting plate. In this preferred solution, the corresponding parts of the front and rear ends of the upper furnace mounting plate constitute one of the two front and rear furnace tracks, which is conducive to further simplifying and compacting the corresponding structure and improving the corresponding installation efficiency.

[0014] As a preferred embodiment, it also includes an inverted sealed barrel and a water tank. The water tank is composed of an inner groove barrel, an outer groove barrel and a lower plate connected in a sealed manner. The water tank contains water, and the function of the water is to seal the sintered workpiece through the barrel body. The lower surface of the bottom of the inverted sealed barrel is supported on the top sintered object, and the side wall of the inverted sealed barrel is inserted in the water in the water tank. This preferred scheme can effectively reduce the adverse effects of the sintered object on the sintering process due to contact with high-temperature gas, and can effectively improve the sintering quality of the sintered object. Further preferably, the bottoms of the inner groove barrel and the outer groove barrel are sealed and connected to the lower plate, thereby further improving the corresponding sealing quality. Further preferably, it also includes a vibration device, which is fixedly connected to the upper plate of the lifting frame. The vibration device is used to vibrate the lower furnace during the operation to drive the sintered object to generate a certain vibration, thereby increasing the density of the sintered object and improving the sintering. In this way, during the sintering process, the lower furnace can vibrate, which can cause the vibration of the workpiece, thereby promoting the densification process of the sintered workpiece, thus improving the quality of the sintered workpiece. In summary, the bell furnace proposed in the present invention greatly reduces the lifting height of the lifting platform, greatly reduces the overall height of the equipment, and the overall operating efficiency is also higher, and the equipment maintenance is also easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : A schematic cross-sectional view of the main structure when the left half furnace body and the right half furnace body of the first embodiment are at the far left and the far right respectively; Figure 2 : A schematic top view of the main structure of the first embodiment when the left half furnace body and the right half furnace body are at the far left and the far right respectively;

[0016] Figure 3 : A schematic top view of the main structure of the first embodiment when the left half furnace body and the right half furnace body are respectively at the far right and the far left;

[0017] In the figure: upper furnace 1, lower furnace 2, lower furnace board 2.1, lower furnace support plate 3, lifting device 4, guide column 5, lifting frame upper plate 6, lifting frame lower plate 7, upper furnace mounting plate 8, guide column guide seat 9, column 10, left half furnace body 11, right half furnace body 12, furnace body track 13, track body 13A, track body 2 13B, hanger 14, axle 15, roller 16, lower furnace horizontal sliding mechanism 17, guide rail 171, load-bearing plate 172, roller mounting shaft 173, mounting shaft connector 174, shaft roller 175, inverted sealing barrel 18, water tank 19, inner groove cylinder 191, outer groove cylinder 192. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0019] Embodiment 1:

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention includes an upper furnace 1, a lower furnace 2, a lower furnace support plate 3, a lifting device 4, a guide column 5, an upper plate 6 of a lifting frame, a lower plate 7 of a lifting frame, an upper furnace mounting plate 8, a guide column guide seat 9, a column 10, a left half furnace body 11, a right half furnace body 12, a furnace body track 13, and a furnace body mounting frame. The furnace body mounting frame includes a hanger 14, an axle 15, a roller 16, and a lower furnace horizontal sliding mechanism 17. The outer ends of the left half furnace body 11 and the right half furnace body 12 are both semi-cylindrical, and the upper and lower ends are semi-circular. The lifting device 4 can be one of a variety of lifting devices such as a hydraulic lifting device, a pneumatic lifting device, a gear lifting device, etc. Their structures and working principles are all well-known technologies and will not be described here in detail;

[0021] The front and rear furnace rails 13 are both oriented left and right, and the upper ends of the furnace rails 13 are detachably fixedly connected to the front and rear ends of the upper furnace mounting plate 8. The front and rear ends of the upper ends of the left half furnace body 11 and the right half furnace body 12 located below the furnace rails 13 are respectively fixedly connected to the lower ends of the front and rear hangers 14 arranged on the left and right sides of the corresponding furnace rails 13, and the upper ends of the hangers 14 are fixedly connected to the corresponding axles 15, and the corresponding rollers 16 are connected to the axles 15, and the rollers 16 are rollingly supported on the corresponding furnace rails 13. As a preferred embodiment, the furnace track 13 of this embodiment includes a track body 13A and a track body 13B, and the track body 13A and the track body 13B are channel steels of the same specifications, and the left and right ends thereof are provided with blocking blocks not shown in the figure to prevent the left half furnace body 11 and the right half furnace body 12 from leaving the furnace track. The specific structural details of the track body 13A, the track body 13B and the detachable connection with the upper furnace mounting plate 8 are simple technologies and are not described in detail here [including detailed illustrations]. The track body 13A and the track body 13B are arranged at intervals, and the corresponding part of the hanger 14 is located in the middle position of the adjacent parts of the track body 13A and the track body 13B. The front and rear ends of each wheel axle 15 are respectively provided with a roller 16 rollingly supported on the track body 13A and the track body 13B. The left half furnace body 11 and the right half furnace body 12 are each equipped with four pairs of rollers 16 to ensure the stability of the left half furnace body 11 and the right half furnace body 12 moving left and right. The blocking blocks for preventing the roller 16 from leaving the furnace track 13 are arranged on the left and right ends of the track 1 13A and the track 2 13B or are arranged on the left and right ends of the track 1 13A and the track 2 13B at the same time. The left and right movement of the left half furnace body 11 and the right half furnace body 12 can be achieved by manual pushing or by an automatic control mechanism. In order to save costs and make it easy to push the left and right half furnace body 11 and the right half furnace body 12 by manpower, this embodiment adopts the method of manually pushing the left and right half furnace body 11 and the right half furnace body 12 to achieve the left and right movement of the left and right half furnace body 11 and the right half furnace body 12. A pair of industrial hooks with a self-locking function, whose structures are not shown in detail, are provided at the upper and lower ends of the front and rear outer surfaces of the right end of the left half furnace body 11 and the upper and lower ends of the front and rear outer surfaces of the left end of the right half furnace body 12, respectively, so that the corresponding surfaces of the left half furnace body 11 and the right half furnace body 12 and the corresponding surfaces of the left half furnace body 11 and the right half furnace body 12 and the upper furnace block and the lower furnace block are always in a state of closed contact during the entire sintering process;

[0022] The lower furnace horizontal push mechanism 17 comprises two guide rails 171 respectively arranged between the two left columns 10 and the guide column 5 and between the two right columns 10 and the guide column 5, which are in a forward and backward direction [the guide rails 171 are provided with a structure to prevent the push-pull lower furnace horizontal push mechanism 17 from being over-positioned when moving the lower furnace], and roller mounting shafts 173 respectively located in the front and rear of the lower end of the lower furnace 2 and in a forward and backward direction. The left and right ends of the front and rear roller mounting shafts 173 are respectively connected to a forward and backward mounting shaft connecting member 174, and the left and right ends of the bearing plate 172 are respectively detachably fixed to the lower end of the mounting shaft connecting member 174. The shaft rollers 175 installed at the left and right ends of the roller mounting shaft 173 are rollingly supported on the guide rails 171. Preferably, the guide rail 171 and the mounting shaft connecting member 174 are both made of channel steel, and the relative position of the roller mounting shaft 173 and the mounting shaft connecting member 174 is locked by a set screw, and the roller mounting shaft 173 is provided with a self-lubricating limit ring (not shown in the figure) between the adjacent guide rails 171 and the mounting shaft connecting member 174;

[0023] The lower furnace plate 2.1 at the lower end of the lower furnace furnace 2 is placed on the bearing plate 172.

[0024] When the left furnace body 11 and the right furnace body 12 move toward each other in the left and right directions to the limit positions, the front and rear ends of the upper ends of the upper and lower ends of the left furnace body 11 are respectively sealed and connected with the front and rear ends of the upper ends of the upper and lower ends of the right furnace body 12; the remaining parts of the upper ends of the right end of the left furnace body 11 and the left end of the right furnace body 12 are respectively sealed and connected with the upper ends of the left half and the right half of the upper furnace 1 and the lower furnace 2, so that the sintered material placed on the top of the lower furnace 2 is surrounded therein for sintering operation;

[0025] When the left furnace body 11 and the right furnace body 12 move to the left and right sides to the limit positions respectively [the limit positions here refer to the positions sufficient to pull the lower furnace out of the left furnace body 11 and the right furnace body 12], the sintered materials are lowered to the corresponding positions and pushed away to complete a sintering operation.

[0026] As a preferred embodiment, it also includes an inverted sealed barrel 18 and a water tank 19; the water tank 19 is composed of an inner groove barrel 191, an outer groove barrel 192 and a lower furnace plate 2.1 which are sealed and connected. The water tank 19 contains water, and the lower surface of the bottom of the inverted sealed barrel 18 is supported on the sintered object at the top, and the side wall of the inverted sealed barrel 18 is inserted into the water in the water tank 19. Further preferably, the bottoms of the inner groove barrel 191 and the outer groove barrel 192 are sealed and connected and then sealed and connected to the lower furnace plate 2.1. This preferred embodiment is suitable for sintering operations of objects whose sintered objects should not be in contact with air during the sintering process. At this time, the closed contact parts of the original lower furnace furnace and the lower ends of the left half furnace body 11 and the right half furnace body 12 are replaced by the corresponding parts of the outer groove barrel 192.

[0027] In addition, it should be pointed out that the setting of the lifting device is suitable for use when a certain pressure needs to be applied to the sintered object during the sintering process. The specific force application method and force size are completed by manual or automatic detection mechanisms according to the sintering process, and the detailed process is not repeated here. Since the thickness change rate of the sintered object is very small during the sintering process, and the relevant pressure value can meet the sintering requirements as long as it is within a certain range, it is preferred to use the method of manually pressurizing and adjusting the force size to apply a certain pressure to the sintered object. In addition, an excitation motor can be fixedly connected to the upper plate 6 of the lifting frame as an excitation device. For example, an excitation motor can be fixedly connected to the lower surface of the upper plate 6 of the lifting frame as an excitation device.

[0028] Embodiment 2:

[0029] The difference between the second embodiment and the first embodiment is that the main body of the furnace body rail 13 in the second embodiment is "concave" shaped, and a plurality of connecting ears are respectively provided at the upper ends of the front and rear side walls of the furnace body rail 13, and are detachably connected to the upper furnace mounting plate 8 through these connecting ears, and a groove running left and right is provided at the bottom of the furnace body rail 13, constituting a section in the corresponding interval between the rail body 1 13A and the rail body 2 13B in the first embodiment for installing the furnace body mounting frame.

[0030] Embodiment three:

[0031] The difference between the third embodiment and the first embodiment is that the wheel track 13 and the upper furnace installation plate 8 in the third embodiment are the same body, and the corresponding parts of the front and rear ends of the upper furnace installation plate 8 are respectively provided with two grooves running left and right; the upper end of the hanger 14 is located at the upper end of the upper furnace installation plate 8, and the front and rear ends of each wheel axle 15 are respectively provided with a roller 16 rollingly supported on the upper furnace installation plate 8. Preferably, the upper furnace installation plate 8 is also detachably connected to the corresponding dust cover to prevent it from falling on the moving track of the roller. The specific structural details are simple technologies and are not described here.

[0032] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation structure and implementation scope of the present invention. In fact, some equivalent changes can also be made according to the shape, structure and design purpose described in the present invention. Therefore, all equivalent changes made according to the shape, structure and design purpose described in the present invention should be included in the protection scope of the present invention, that is, these equivalent changes should be protected by the present invention.

Claims

1. A bell-shaped furnace, comprising an upper furnace sill (1), a lower furnace sill (2), a lower furnace sill support plate (3), a lifting device (4), a guide column (5), a lifting frame upper plate (6), a lifting frame lower plate (7), an upper furnace sill mounting plate (8), a guide column guide seat (9), and a column (10); wherein: Also includes A left half furnace body (11), a right half furnace body (12), a furnace body track (13), a furnace body mounting frame, and a lower furnace horizontal sliding mechanism (17); the furnace body mounting frame includes a hanger (14), a wheel axle (15), and a roller (16); The front and rear furnace rails (13) are both oriented to the left and right; the upper ends of the furnace rails (13) are respectively fixedly connected to the front and rear ends of the upper furnace mounting plate (8); The front and rear ends of the upper ends of the left half furnace body (11) and the right half furnace body (12) located below the furnace body track (13) are respectively fixedly connected to the lower ends of the front and rear hangers (14) arranged on the left and right sides of the corresponding furnace body track (13); the upper ends of the hangers (14) are fixedly connected to the corresponding wheel axles (15); the corresponding rollers (16) are connected to the wheel axles (15); and the rollers (16) are rollingly supported on the corresponding furnace body track (13); The lower furnace turret horizontal displacement mechanism (17) comprises two guide rails (171) arranged between the two left uprights (10) and the guide column (5) and between the two right uprights (10) and the guide column (5) and extending forward and backward, respectively; roller mounting shafts (173) respectively located at the front and rear of the lower end of the lower furnace turret (2); the left and right ends of the front and rear roller mounting shafts (173) are respectively connected to a mounting shaft connecting piece (174) extending forward and backward; the left and right ends of the bearing plate (172) are respectively fixedly connected to the mounting shaft connecting piece (174); the shaft rollers (175) installed at the left and right ends of the roller mounting shaft (173) are rollingly supported on the guide rails (171); The lower furnace plate (2.1) at the lower end of the lower furnace plate (2) is placed on the load-bearing plate (172).

2. The bell furnace according to claim 1, characterized in that: The furnace track (13) comprises a track body 1 (13A) and a track body 2 (13B); the track body 1 (13A) and the track body 2 (13B) are arranged at intervals, the corresponding part of the hanger (14) is located in the middle of the adjacent parts of the track body 1 (13A) and the track body 2 (13B), and the front and rear ends of each wheel axle (15) are respectively provided with a roller (16) which is rollingly supported on the track body 1 (13A) and the track body 2 (13B).

3. The bell furnace according to claim 1, characterized in that: The main body of the furnace track (13) is in a concave shape. The upper ends of the front and rear side walls of the furnace track (13) are fixedly connected to the upper furnace mounting plate (8). The bottom of the furnace track (13) is provided with a groove running left and right.

4. The bell furnace according to claim 1, characterized in that: The furnace rail (13) and the upper furnace mounting plate (8) are formed into a single body, and grooves running left and right are respectively arranged at corresponding positions at the front and rear ends of the upper furnace mounting plate (8); the upper end of the hanger (14) is located at the upper end of the upper furnace mounting plate (8), and the front and rear ends of each wheel axle (15) are respectively provided with a roller (16) which is rollingly supported on the upper furnace mounting plate (8).

5. The bell furnace according to claim 1, characterized in that: The invention also comprises an inverted sealed barrel (18) and a water tank (19); the water tank (19) is composed of an inner tank cylinder (191), an outer tank cylinder (192) and a lower plate (2.1) which are sealed and connected to each other; the water tank (19) contains water; the lower surface of the bottom of the inverted sealed barrel (18) is supported on the uppermost sintered object; and the side wall of the inverted sealed barrel (18) is inserted into the water in the water tank (19).

6. The bell furnace according to claim 5 is characterized in that: The bottoms of the grooved cylinder (191) and the outer grooved cylinder (192) are sealed and connected to each other and then to the lower plate (2.1).

7. The bell furnace according to claim 5, characterized in that: It also includes a vibration excitation device, which is fixedly connected to the upper plate (6) of the lifting frame.

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