Low-temperature sintering equipment for ceramic material

Abstract

The invention discloses low-temperature sintering equipment for a ceramic material, and relates to the technical field of ceramic sintering. The equipment comprises a heating part, a graphite crucible and a heating spiral pipe connected to alternating current are used, low-melting-point ceramic powder is heated and melted, an integrated temperature management module is driven by a cooling pump through magnetic force, the low-temperature working state of the heating spiral pipe is kept, and the cooling pump utilizes a permanent magnet rotating disc and a magnetic plate; cooling liquid circulation without mechanical contact, efficient separation and cooling of high-temperature cooling liquid are achieved, heat absorbed by the heat absorption pieces is effectively dissipated through the cooling fins and the cooling fan, the system further comprises a switching assembly, an operator is allowed to flexibly switch between an internal cooling system and an external cold water source, and in addition, the system is convenient to operate. The equipment adopts the structural design of the separation barrel and the external sleeve barrel, heat loss is reduced through vacuum, and the heating efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic sintering, in particular to low-temperature sintering equipment for ceramic materials. Background Art

[0002] In the heating process of traditional ceramic material low-temperature sintering equipment, commonly used heating elements such as heating coils or heating tubes will generate a lot of heat, which will affect the heating efficiency and service life of the heating elements themselves. In addition, the high-temperature and low-temperature coolants in the cooling system are not effectively separated, the heat exchange efficiency is low, the cooling effect is not ideal, and the cooling time is prolonged.

[0003] In traditional designs, the heat loss of the heating element is not well controlled, and the heat is easily lost to the surrounding environment, resulting in energy waste and increased operating costs. Imperfect heat management may also affect the stability of the sintering environment, thereby affecting the quality of the ceramic material. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a low-temperature sintering device for ceramic materials, comprising a heating part, the heating part comprising a graphite crucible, the graphite crucible is overlapped on the chassis, the outer surface sliding sleeve of the graphite crucible is provided with a graphite crucible bracket fixedly matched with the chassis, a heating spiral tube is arranged around the outer side of the graphite crucible bracket, the interior of the heating spiral tube is hollow, both ends of the heating spiral tube are connected to alternating current for heating the graphite crucible, low melting point ceramic powder can be placed in the graphite crucible, and the low melting point ceramic powder is melted by the graphite crucible; a temperature management module for controlling the working temperature of the heating spiral tube is also provided on the side of the graphite crucible, wherein the temperature management module can keep the heating spiral tube in a low-temperature working state.

[0005] Preferably, an outer sleeve barrel is provided on the outer side of the graphite crucible, wherein the outer sleeve barrel is fixed at the bottom of the inner wall of the partition tube, and a buckle cover is provided on the top sealing buckle of the outer sleeve barrel, and the buckle cover is rotationally matched with the outer sleeve barrel through a spline shaft, wherein the spline shaft and the buckle cover are slidingly matched in a spline manner.

[0006] Preferably, a separation tube is further provided between the graphite crucible and the outer sleeve barrel, and the separation tube is sleeved on the outside of the graphite crucible; a gap is left between the buckle cover and the top of the graphite crucible; the heating spiral tube is arranged between the graphite crucible support and the separation tube, and the gap between the graphite crucible and the separation tube can accommodate the graphite crucible support and the heating spiral tube; a sealing ring is fixedly sealed between the separation tube and the top of the graphite crucible; a gas input nozzle is provided at the bottom of the separation tube for providing inert gas to the space between the outer sleeve barrel and the separation tube, so that the inert gas contacts with the low-melting-point ceramic powder in the graphite crucible; an electric valve is fixedly provided on the buckle cover for discharging excess gas from the inside of the outer sleeve barrel.

[0007] Preferably, the temperature management module includes a cooling pump, a magnetic plate is rotatably mounted on the inner wall of the cooling pump, a plurality of rotating dial plates are fixed in a circular array on the magnetic plate, a heat absorbing plate is provided at the rotation center of all the rotating dial plates, a cooling pipe is fixedly connected at the center of the circle at the bottom of the cooling pump, and the cooling pipe is connected to one end of the heating spiral tube through a switching component.

[0008] Preferably, a sealing plate is fixedly sealed on the top of the inner wall of the cooling pump, a heat sink is fixed on the sealing plate, the heat sink is fixedly connected to the heat absorption plate, a drain nozzle is also provided at the tangent position of the inner wall of the cooling pump, the drain nozzle is connected to the inside of the cooling pump, and the drain nozzle is connected to the other end of the heating spiral tube through a heat dissipation radiator.

[0009] Preferably, a collector cover is fixed on the side of the heat sink, and a guide channel tube is fixedly connected to the collector cover. The end of the guide channel tube away from the heat sink is arranged just above the center of the heat sink; a heat sink fan is rotatably mounted in the middle of the heat sink through a heat sink bracket.

[0010] Preferably, the cooling pump, the heat sink, the external barrel and the switching assembly are all fixed on the supporting frame, and the driving motor is also fixed on the supporting frame. A gearbox is fixed on the outer surface of the cooling pump, and the output shaft of the gearbox is connected to the cooling fan through a top transmission belt, wherein the permanent magnet turntable bracket fixed to the cooling pump is fixed to the supporting frame; a permanent magnet turntable is rotatably mounted on the bottom of the outer surface of the cooling pump through the permanent magnet turntable bracket, and the permanent magnet turntable is connected to the input shaft of the gearbox through a bottom transmission belt, wherein the permanent magnet turntable bracket is fixedly matched with the cooling pump; and the input shaft of the gearbox is fixedly matched with the output shaft of the driving motor.

[0011] Preferably, the switching assembly includes a switching chamber, which is equipped with a replenishing pipe, an output pipe and an input pipe that are arranged perpendicular to each other. A switching seal rotating block is rotatably installed inside the switching chamber, a T-shaped circular tube channel is arranged inside the switching seal rotating block, and a rotating seal cooperates between the switching seal rotating block and the switching chamber.

[0012] Preferably, a switching motor is fixed on the outer surface of the switching chamber, a switching driving gear is fixed on the output shaft of the switching motor, a switching execution gear is fixed on the switching seal rotating block, and the switching execution gear and the switching driving gear are meshed for transmission.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention effectively keeps the heating spiral tube in a low-temperature working state by introducing a temperature management module. Since the melting process of the low-melting-point ceramic powder generates a large amount of heat, the heating spiral tube is prone to overheating. The temperature management module adopts a magnetically driven cooling pump, and utilizes the magnetic coupling of the permanent magnetic turntable and the magnetic plate to realize the efficient circulation of the coolant, and absorbs the heat of the high-temperature liquid through the heat absorbing plate, thereby accelerating the cooling process. The density of the cooled liquid increases and is reintroduced into the circulation. This design greatly improves the cooling efficiency and ensures the stable operation of the heating spiral tube; (2) The heat absorbed by the heat absorbing plate of the present invention is transferred to the heat sink, and the rotation of the heat sink fan generates airflow to enhance the heat dissipation effect. At the same time, the arrangement of the guide channel tube and the confluence cover allows air to form air flow between the heat sink and the heat sink, further improving the heat dissipation efficiency. This multi-stage heat dissipation method prevents overheating and ensures the continuous and stable operation of the equipment; (3) The design of the switching component of the present invention enables the operator to freely switch between the internal cooling system and the external cold water source. By rotating the switching sealing rotating block, the heating spiral tube can be directly connected to the external cold water source. This flexibility is particularly important when the internal cooling system is overloaded or when external cooling resources are more sufficient, and enhances the ability of the equipment to adapt to different working conditions; (4) The present invention effectively reduces the heat transfer from the heating spiral tube to the outside by setting a gap between the separation tube and the external barrel and using a vacuum pump to reduce medium transmission. This design improves thermal efficiency and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a diagram showing the installation position of the drive motor of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the guide channel tube of the present invention.

[0017] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0018] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at point B in the middle.

[0019] Figure 6 This is a schematic diagram of the heating spiral tube structure of the present invention.

[0020] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point C in the middle.

[0021] Figure 8 This is a schematic diagram of the structure of the graphite crucible support of the present invention.

[0022] Fig. 9 It is a schematic diagram of the structure of the permanent magnet turntable of the present invention.

[0023] Fig.10 This is a structural breakdown diagram of the cooling pump of the present invention.

[0024] Fig.11 It is a schematic diagram of the internal structure of the cooling pump of the present invention.

[0025] In the figure: 101-cooling pump; 102-cooling pipe; 103-magnetic plate; 104-rotating dial plate; 105-sealing plate; 106-heat absorbing plate; 107-heat sink; 108-permanent magnetic turntable; 109-permanent magnetic turntable bracket; 110-bottom transmission belt; 111-gearbox; 112-top transmission belt; 113-cooling fan bracket; 114-cooling fan; 115-guiding channel pipe; 116-collector cover; 117-heat dissipation radiator; 118-driving motor; 119-switching motor; 120- Switching chamber; 121-replenishing pipe; 122-output pipe; 123-switching driving gear; 124-switching execution gear; 125-input pipe; 126-heating spiral tube; 127-switching sealing rotating block; 128-graphite crucible; 129-graphite crucible bracket; 130-chassis; 131-external barrel; 132-gas input nozzle; 133-separation cylinder; 134-spline shaft; 135-buckle cover; 136-electric valve; 137-support frame; 138-drain nozzle; 139-sealing ring. DETAILED DESCRIPTION

[0026] Combine the following Figure 1-Figure 11 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0027] The present invention provides a low-temperature sintering device for ceramic materials, comprising a heating part, the heating part comprising a graphite crucible 128, the graphite crucible 128 is overlapped on a bottom plate 130, the outer surface of the graphite crucible 128 is provided with a sliding sleeve of a graphite crucible support 129 fixedly matched with the bottom plate 130, the outer side of the graphite crucible support 129 is surrounded by a heating spiral tube 126, the interior of the heating spiral tube 126 is hollow, and both ends of the heating spiral tube 126 are connected to an alternating current for heating the graphite crucible 128. 28. Low-melting-point ceramic powder can be placed in the graphite crucible 128, and the low-melting-point ceramic powder is melted through the graphite crucible 128; an outer sleeve barrel 131 is provided on the outer side of the graphite crucible 128, wherein the outer sleeve barrel 131 is fixed to the bottom of the inner wall of the partition cylinder 133, and a buckle cover 135 is provided on the top sealing buckle of the outer sleeve barrel 131, and the buckle cover 135 is rotatably matched with the outer sleeve barrel 131 through a spline shaft 134, wherein the spline shaft 134 and the buckle cover 135 are slidably matched in a spline manner. A separation tube 133 is also provided between the graphite crucible 128 and the outer sleeve barrel 131, and the separation tube 133 is sleeved on the outer side of the graphite crucible 128; a gap is left between the buckle cover 135 and the top of the graphite crucible 128; wherein the heating spiral tube 126 is arranged between the graphite crucible support 129 and the separation tube 133, and the gap between the graphite crucible 128 and the separation tube 133 can accommodate the graphite crucible support 129 and the heating spiral tube 126; a sealing ring 139 is fixedly sealed between the separation tube 133 and the top of the graphite crucible 128; a gas input nozzle 132 is provided at the bottom of the separation tube 133 for providing inert gas to the space between the outer sleeve barrel 131 and the separation tube 133, so that the inert gas contacts with the low-melting-point ceramic powder in the graphite crucible 128; an electric valve 136 is fixedly provided on the buckle cover 135 for discharging excess gas from the inside of the outer sleeve barrel 131.

[0028] A temperature management module for controlling the working temperature of the heating coil 126 is also provided on the side of the graphite crucible 128, wherein the temperature management module can keep the heating coil 126 in a low-temperature working state. The temperature management module includes a cooling pump 101, a magnetic plate 103 is rotatably mounted on the inner wall of the cooling pump 101, a plurality of rotating dial plates 104 are fixed in a circular array on the magnetic plate 103, a heat absorbing plate 106 is provided at the rotation center of all rotating dial plates 104, a cooling pipe 102 is fixedly connected and provided at the center of the circle at the bottom of the cooling pump 101, and the cooling pipe 102 is connected to one end of the heating coil 126 through a switching component. The top of the inner wall of the cooling pump 101 is fixedly sealed with a sealing plate 105, and a heat sink 107 is fixed on the sealing plate 105. The heat sink 107 is fixedly connected to the heat absorbing plate 106. A drainage nozzle 138 is also provided at the tangent position of the inner wall of the cooling pump 101. The drainage nozzle 138 is connected to the inside of the cooling pump 101. The drainage nozzle 138 is connected to the other end of the heating spiral tube 126 through the heat dissipation radiator 117. A confluence cover 116 is fixed on the side of the heat dissipation radiator 117, and a guide channel tube 115 is fixedly connected to the confluence cover 116. The end of the guide channel tube 115 away from the heat dissipation radiator 117 is arranged just above the center of the heat sink 107; a heat dissipation fan 114 is rotatably installed in the middle of the heat dissipation radiator 107 through a heat dissipation fan bracket 113. The cooling pump 101, the heat sink 117, the external barrel 131 and the switching assembly are all fixed on the supporting frame 137, and the driving motor 118 is also fixed on the supporting frame 137. The gearbox 111 is fixed on the outer surface of the cooling pump 101, and the output shaft of the gearbox 111 is connected to the cooling fan 114 through the top transmission belt 112, wherein the permanent magnet turntable bracket 109 fixed to the cooling pump 101 is fixed to the supporting frame 137; the bottom of the outer surface of the cooling pump 101 is rotatably mounted with a permanent magnet turntable 108 through the permanent magnet turntable bracket 109, and the permanent magnet turntable 108 is connected to the input shaft of the gearbox 111 through the bottom transmission belt 110, wherein the permanent magnet turntable bracket 109 is fixedly matched with the cooling pump 101; the input shaft of the gearbox 111 is fixedly matched with the output shaft of the driving motor 118.

[0029] The switching assembly includes a switching chamber 120, on which a replenishing pipe 121, an output pipe 122 and an input pipe 125 are arranged perpendicularly to each other. A switching seal rotating block 127 is rotatably installed inside the switching chamber 120, a T-shaped circular pipe channel is arranged inside the switching seal rotating block 127, and a rotating seal cooperates between the switching seal rotating block 127 and the switching chamber 120. A switching motor 119 is fixed on the outer surface of the switching chamber 120, a switching driving gear 123 is fixed on the output shaft of the switching motor 119, and a switching execution gear 124 is fixed on the switching seal rotating block 127, and the switching execution gear 124 and the switching driving gear 123 are meshed and transmitted.

[0030] The working principle of a low-temperature sintering device for ceramic materials disclosed in the present invention is as follows: the buckle cover 135 is opened, and then the low-melting-point ceramic powder is poured into the graphite crucible 128, and then high-frequency alternating current is applied to both ends of the heating spiral tube 126, and the heating spiral tube 126 heats the graphite crucible 128, and then the low-melting-point ceramic powder inside the graphite crucible 128 is melted. In this process, the heating spiral tube 126 itself will generate a lot of heat, so it is necessary to cool the heating spiral tube 126 to maintain a low temperature state and ensure its working efficiency. After the low-melting-point ceramic powder is melted, the molten glass melt is discharged. To cool down the heating spiral tube 126, it is necessary to start the drive motor 118. The output shaft of the drive motor 118 drives the input shaft of the gearbox 111 to rotate. The input shaft of the gearbox 111 drives the permanent magnet turntable 108 to rotate through the bottom transmission belt 110. The permanent magnet turntable 108 and the magnetic plate 103 cooperate with each other magnetically. Therefore, the rotation of the permanent magnet turntable 108 drives the magnetic plate 103 to rotate through the magnetic force. The rotation of the magnetic plate 103 drives the rotating dial 104 to rotate. The rotation of the rotating dial 104 drives the coolant inside the cooling pump 101 to rotate. At this time, the axial position inside the cooling pump 101 will be in a low-pressure state, thereby sucking the high-temperature coolant inside the heating spiral tube 126 through the cooling tube 102. In this process, the switching seal rotating block 127 in the switching assembly needs to rotate 180° (refer to Figure 7 ), the rotation of the switch seal rotating block 127 needs to be controlled by the switch motor 119, the output shaft of the switch motor 119 drives the switch drive gear 123 to rotate, the switch drive gear 123 drives the switch execution gear 124 to rotate, and the switch execution gear 124 drives the switch seal rotating block 127 to rotate. After the high-temperature coolant enters the cooling pump 101, it will rotate inside the cooling pump 101. At this time, the high-temperature liquid and the low-temperature liquid in the coolant will separate. Since the density of the high-temperature liquid is less than that of the low-temperature liquid, the low-temperature liquid will be collected at the edge of the inner wall of the cooling pump 101 under the action of centrifugal force, while the relatively high-temperature liquid will be located at the axial position of the cooling pump 101. At this time, the temperature of the high-temperature liquid is absorbed by the heat absorbing sheet 106 to reduce its temperature. At this time, the density of this part of the liquid will also increase, so that it moves to the inner wall surface of the cooling pump 101, and the temperature of the heat absorbing sheet 106 will be transferred to the heat sink 107, and then continue to dissipate heat. The low-temperature liquid on the inner wall surface of the cooling pump 101 will enter the heat dissipation radiator 117 through the drainage nozzle 138, and then flow into the heating spiral tube 126 again. It should be noted that the diameter of the drainage nozzle 138 is smaller than the diameter of the cooling tube 102.

[0031] The output shaft of the gearbox 111 drives the cooling fan 114 to rotate through the top transmission belt 112. The rotation of the cooling fan 114 drives the air flow. This process causes the air to flow toward the axis of the heat sink 107, thereby dissipating heat from the heat sink 107 (the heat sink 107 absorbs the temperature of the heat absorbing sheet 106, and the heat absorbing sheet 106 absorbs the temperature of the coolant). At the same time, the air inside the guide channel tube 115 arranged above the cooling fan 114 will flow under the action of the cooling fan 114, so the inside of the guide channel tube 115 is in a low-pressure state. At this time, the external air will enter the confluence cover 116 through the heat sink 117, and then enter the guide channel tube 115. A gap is set between the guide channel tube 115 and the cooling fan 114, so the cold air outside the gap will pass through the gap under the action of pressure and flow toward the cooling fan 114, which can increase the flow rate of the air entering the cooling fin 107 and reduce its temperature. When the air passes through the heat dissipation radiator 117 , the air dissipates heat from the heat dissipation radiator 117 , thereby performing a secondary cooling on the coolant flowing through the heat dissipation radiator 117 .

[0032] Setting a gap between the separation tube 133 and the outer sleeve barrel 131 can further reduce the temperature escape of the heating spiral tube 126, for example, closing the electric valve 136, and then connecting the gas input nozzle 132 to the vacuum pump to reduce the temperature transmission medium between the separation tube 133 and the outer sleeve barrel 131.

[0033] Rotate the switch seal rotating block 127 counterclockwise to Figure 7 The position shown is 90°, and then the replenishing pipe 121 is connected to the external cold water source, and then the connecting end of the heating spiral tube 126 and the heat dissipation radiator 117 is disconnected. At this time, the external cold water source can directly cool the heating spiral tube 126 without passing through the temperature management module.

Claims

1. A low temperature sintering device for ceramic materials, characterized in that: The heating device comprises a heating part, wherein the heating part comprises a graphite crucible (128), the graphite crucible (128) is overlapped on a bottom plate (130), a graphite crucible support (129) fixedly matched with the bottom plate (130) is provided on the outer surface of the graphite crucible (128) through a sliding sleeve, a heating spiral tube (126) is arranged around the outer side of the graphite crucible support (129), the inside of the heating spiral tube (126) is hollow, and both ends of the heating spiral tube (126) are connected to alternating current for heating the graphite crucible (128), and low-melting-point ceramic powder can be placed in the graphite crucible (128), and the low-melting-point ceramic powder is melted through the graphite crucible (128); A temperature management module for controlling the working temperature of the heating coil (126) is also provided on the side of the graphite crucible (128), wherein the temperature management module can keep the heating coil (126) in a low-temperature working state.

2. The low temperature sintering equipment for ceramic materials according to claim 1, characterized in that: An outer sleeve barrel (131) is arranged on the outer side of the graphite crucible (128), wherein the outer sleeve barrel (131) is fixed at the bottom of the inner wall of the partition cylinder (133), and a buckle cover (135) is provided on the top sealing buckle of the outer sleeve barrel (131), and the buckle cover (135) is rotationally matched with the outer sleeve barrel (131) through a spline shaft (134), wherein the spline shaft (134) and the buckle cover (135) are slidingly matched in a spline manner.

3. The low temperature sintering equipment for ceramic materials according to claim 2, characterized in that: A separation tube (133) is also provided between the graphite crucible (128) and the outer sleeve barrel (131), and the separation tube (133) is sleeved on the outside of the graphite crucible (128); a gap is left between the buckle cover (135) and the top of the graphite crucible (128); the heating spiral tube (126) is provided between the graphite crucible support (129) and the separation tube (133), and the gap between the graphite crucible (128) and the separation tube (133) can accommodate the graphite crucible support (129) and the heating spiral tube (126); A sealing ring (139) is fixedly sealed between the separation tube (133) and the top of the graphite crucible (128); a gas input nozzle (132) is provided at the bottom of the separation tube (133) for supplying an inert gas to the space between the outer sleeve barrel (131) and the separation tube (133), so that the inert gas contacts the low-melting-point ceramic powder in the graphite crucible (128); an electric valve (136) is fixedly provided on the buckle cover (135) for discharging excess gas from the outer sleeve barrel (131).

4. The low temperature sintering equipment for ceramic materials according to claim 3, characterized in that: The temperature management module comprises a cooling pump (101), a magnetic plate (103) is rotatably mounted on the inner wall of the cooling pump (101), a plurality of rotating dial plates (104) are fixed in a circular array on the magnetic plate (103), a heat absorbing plate (106) is arranged at the rotation center of all the rotating dial plates (104), a cooling pipe (102) is fixedly connected and arranged at the center of the circle at the bottom of the cooling pump (101), and the cooling pipe (102) is connected to one end of the heating spiral tube (126) through a switching component.

5. The low temperature sintering equipment for ceramic materials according to claim 4, characterized in that: A sealing plate (105) is fixedly sealed at the top of the inner wall of the cooling pump (101), a heat sink (107) is fixed on the sealing plate (105), the heat sink (107) is fixedly connected to the heat absorbing plate (106), a drainage nozzle (138) is also provided at a tangent position of the inner wall of the cooling pump (101), the drainage nozzle (138) is connected to the inside of the cooling pump (101), and the drainage nozzle (138) is connected to the other end of the heating spiral tube (126) through a heat dissipation radiator (117).

6. The low temperature sintering equipment for ceramic materials according to claim 5, characterized in that: A collector cover (116) is fixed on the side of the heat dissipation radiator (117), a guide channel tube (115) is fixedly connected to the collector cover (116), and one end of the guide channel tube (115) away from the heat dissipation radiator (117) is arranged just above the center of the heat dissipation fin (107); a heat dissipation fan (114) is rotatably mounted in the middle of the heat dissipation fin (107) via a heat dissipation fan bracket (113).

7. The low temperature sintering equipment for ceramic materials according to claim 6, characterized in that: The cooling pump (101), the heat dissipation radiator (117), the external barrel (131) and the switching assembly are all fixed on a support frame (137). A driving motor (118) is also fixed on the support frame (137). A gearbox (111) is fixed on the outer surface of the cooling pump (101). The output shaft of the gearbox (111) is connected to the heat dissipation fan (114) through a top transmission belt (112). The permanent magnetic turntable bracket (109) fixed to the cooling pump (101) is fixed to the support frame (137). A permanent magnetic turntable (108) is rotatably mounted on the bottom of the outer surface of the cooling pump (101) via a permanent magnetic turntable bracket (109), and the permanent magnetic turntable (108) is transmission-connected to the input shaft of a gearbox (111) via a bottom transmission belt (110), wherein the permanent magnetic turntable bracket (109) is fixedly matched with the cooling pump (101); and the input shaft of the gearbox (111) is fixedly matched with the output shaft of the drive motor (118).

8. The low temperature sintering equipment for ceramic materials according to claim 7, characterized in that: The switching assembly comprises a switching chamber (120), on which a replenishing pipe (121), an output pipe (122) and an input pipe (125) are arranged perpendicularly to each other. A switching seal rotating block (127) is rotatably mounted inside the switching chamber (120), a T-shaped circular pipe channel is arranged inside the switching seal rotating block (127), and a rotational seal cooperates between the switching seal rotating block (127) and the switching chamber (120).

9. The low temperature sintering equipment for ceramic materials according to claim 8, characterized in that: A switching motor (119) is fixed on the outer surface of the switching chamber (120), a switching driving gear (123) is fixed on the output shaft of the switching motor (119), a switching execution gear (124) is fixed on the switching seal rotating block (127), and the switching execution gear (124) and the switching driving gear (123) are meshed and transmitted.

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