523results about "Muffle furnaces" patented technology

The invention is suitable for the technical field of powder metallurgy and advanced ceramic material sintering equipment, and provides an integrated flash sintering device for vacuum and a sintering method. The device comprises a power supply module, a high vacuum module, a first servo hydraulic machine, a second servo hydraulic machine, a third servo hydraulic machine, a mold rotation switching module, a vacuum feeding module, a green body pressing module, a demolding and mold cleaning module and a mold transfer module. According to the invention, an integrated gear tray design is adopted to integrate the functions of die installation, graphite paper treatment and green body pressing, and online synchronous cleaning of an electrode and a die is realized through die fixation and a cleaning brush arranged in a cleaning drum; therefore, full-automatic, high-efficiency and high-stability continuous production of flash sintering from powder filling to finished product collection is realized.

The invention provides a semiconductor grade silicon dioxide vacuum sintering furnace which comprises a furnace body, a heating cavity is formed in the middle of the furnace body, and a rear door body is arranged at the first end of the furnace body; the material dragging trolley is arranged in the furnace body in a sliding mode, and a workpiece is placed on the material dragging trolley; the front door body is arranged on one side of the material dragging trolley, and when the material dragging trolley slides into the heating cavity, the front door body seals the second end of the furnace body; the device has the beneficial effects that through the arrangement of the pressing and rotating assembly, a workpiece on the material dragging trolley can be fixed from the two ends, it is ensured that the workpiece is always kept stable in the heating process, and the workpiece can be driven to rotate by the pressing and rotating assembly. In the heating process, the workpieces can be heated more uniformly through rotation of the workpieces, the heating effect and the product quality are improved, the workpieces can be automatically assembled and disassembled through arrangement of the material dragging trolley, the labor intensity of workers is reduced, and the working efficiency is improved.

The invention discloses a preparation method and a preparation system of a silicon-carbon negative electrode material, and the method comprises the following steps: conveying a porous carbon raw material into a deposition furnace, introducing inert gas to replace air in the deposition furnace, and vacuumizing the deposition furnace; raising the temperature of a deposition furnace to 300-800 DEG C, mixing inert gas with the preheated silicon source gas, and introducing the mixture into the deposition furnace for chemical vapor deposition to obtain a silicon-carbon composite material precursor; raising the temperature of a buffer furnace to 300-800 DEG C, conveying the precursor into the buffer furnace, and carrying out chemical vapor deposition by utilizing residual silicon source gas in the buffer furnace; carrying out gas-solid separation on the material in the buffer furnace, conveying the solid to a cladding furnace, detecting the gas, and detecting the content lt of the silicon source gas; and (2) adding 0.2 mg / L of the silicon-carbon composite material into the coating furnace, introducing coating gas into the coating furnace, and performing carbon deposition coating to obtain the silicon-carbon composite material. The preparation system disclosed by the invention is a continuous preparation system, so that the production efficiency is greatly improved, and the requirements of large-scale production are met.

The invention relates to the technical field of heat treatment vacuum furnaces, in particular to a heat treatment vacuum furnace which comprises a furnace body and a furnace door which are arranged in a matched mode, a vacuum pump, an air pump and a pressure relief pump are arranged at the top end of the furnace body in a matched mode, a partition plate is fixedly arranged in a furnace cavity of the furnace body, and the furnace cavity of the furnace body is divided into a first cavity and a second cavity through the partition plate. A heating inner furnace is fixedly arranged in the first cavity, and a placing plate provided with a honeycomb hole array is placed on the heating inner furnace. The honeycomb hole array is formed in the placement plate to enhance the heat dissipation capacity, the area is divided into the central area, the transition area and the edge area, the central area resists principal stress through a dense honeycomb structure, the transition area relieves thermal stress through a single-edge communication design, and the edge area accelerates heat dissipation through a full-edge communication design; therefore, the cooling efficiency of the workpiece is improved while the thermal deformation resistance is ensured.

An injector configured for arrangement within a reactor of a vertical furnace to inject gas in the reactor is provided. The injector is made substantial elongated and configured with an internal gas conduction channel to transport gas from a first end of the injector to a second end of the injector. An outer sidewall of the injector may be tapered towards the second end over at least 10%, preferably 30% and most preferably 50% of the length of the injector to increase tolerances for fitting the injector in the tube.

The utility model provides an ion nitriding reaction device, which belongs to the technical field of ion nitriding and comprises a reaction furnace, an air pressure regulating valve arranged on one side of the top of the reaction furnace, a vacuum extraction pipe arranged on one side of the bottom of the reaction furnace, a vacuum control valve arranged at one end of the vacuum extraction pipe and a thermocouple support arranged at the bottom of the inner wall of the reaction furnace. A ventilation air valve is embedded in the bottom of one side of the reaction furnace, one end of the ventilation air valve is in pipe connection with a thermal insulation three-flow pipe, the thermal insulation three-flow pipe is embedded in the bottom of the inner wall of the reaction furnace, and the two sides of the top of the thermal insulation three-flow pipe are communicated with thermal insulation flow dividing gas conveying pipes in a sealed mode; according to the ionitriding and nitriding reaction device provided by the utility model, the adjusting motor rotates to drive the gear to drive the rack meshed with the gear to rotate, and at the moment, the fan blades drive reaction gas from the bottom to concentrate the gas towards the middle part of the reaction furnace, so that the gas is in full contact with a workpiece, and the ionitriding efficiency is improved.

The invention relates to the technical field of heat treatment, and discloses an optimized heat treatment device for a high-temperature vacuum tube type muffle furnace, which comprises a muffle furnace main body with an air inlet pipe and a cabin door, a clamp conveying mechanism and a sample clamp are arranged in an inner cavity of the muffle furnace main body, and by utilizing the chemical characteristics of the sample clamp, in the heating process, the sample clamp is conveyed to the muffle furnace main body; before the sample heat treatment temperature is reached, oxidation reaction with residual oxygen in the inner cavity of the muffle furnace main body can be carried out, and the residual oxygen in the muffle furnace main body is quickly consumed, so that the inner cavity of the muffle furnace main body can quickly reach a perfect vacuum environment, and the influence of the residual oxygen on the sample heat treatment is avoided; the end, located in the inner cavity of the muffle furnace body, of the gas inlet pipe is provided with the gas guide assembly, replacement gas introduced through the gas inlet pipe enters the inner cavity of the muffle furnace body in a divergent mode through the gas guide assembly, and therefore the phenomenon that an airflow shadow area exists in the inner cavity of the muffle furnace body is avoided, and the content of exhausted oxygen meets the requirement.

The utility model relates to the technical field of vacuum sintering machines, and discloses a vacuum sintering machine with a tray module, which comprises a vacuum sintering machine main body and a sealing cover, linear guide rails are fixedly mounted on the front side and the rear side of the vacuum sintering machine main body, guide sleeves are fixedly mounted on sliding tables of the linear guide rails, and polish rods are slidably mounted on the guide sleeves. The right end of the polished rod and the sealing cover are fixedly assembled, a supporting base is fixedly installed at the bottom of the left side of the sealing cover, a tray module is placed on the upper side of the supporting base, and a driving assembly used for lifting the guide sleeve is installed on the upper side of the vacuum sintering machine body. Through the tray module which is detachably used on the supporting seat, the annular parts can be conveniently placed on the tray module after being stamped and installed in the sealing cover, gaps can be reserved between the annular parts, and the heating uniformity and the yield are improved; and structures such as a driving assembly and a guide sleeve are arranged, so that the sealing cover can conveniently carry out translation and lifting movement with the tray module, and the labor amount of workers is greatly reduced.

The application discloses a pump source sintering jig and relates to the technical field of pump source chip positioning. The pump source sintering jig comprises a pump source base and a positioning jig. The pump source base is provided with a mounting groove. The bottom of the mounting groove is provided with a plurality of chip mounting positions. The positioning jig is arranged in the mounting groove and covers the bottom of the mounting groove. The positioning jig is provided with a plurality of positioning grooves penetrating in the up-down direction. The plurality of positioning grooves are arranged in correspondence with the plurality of chip mounting positions. At least two positioning columns are arranged on the positioning jig. The edges of the upper ends of the positioning columns are chamfered. The positioning columns are used to establish a rectangular coordinate system. Each mounting groove is provided with a corresponding coordinate in the rectangular coordinate system. The position of each mounting groove can be determined by recognizing the positioning columns, so that the technical problem of difficult recognition caused by the blurred edges of the mounting grooves of the positioning jig is avoided.

The invention discloses a temperature control device based on square partition heat one-way active transportation, and belongs to vacuum environment temperature control equipment. A cylindrical vacuum inner tank body is fixedly arranged in a cylindrical vacuum outer tank body, an annular cylindrical vacuum cavity is arranged between the inner wall surface of the cylindrical vacuum outer tank body and the outer wall surface of the cylindrical vacuum inner tank body, and an annular circulating cooling water cavity is arranged on the inner wall surface of a cylindrical side plate of the cylindrical vacuum inner tank body. A square electric heating radiant panel assembly is arranged in a cavity of the cylindrical vacuum inner tank body, a temperature controller and a vacuum pump assembly are fixedly arranged outside the cylindrical vacuum outer tank body, and the temperature controller is communicated with the square electric heating radiant panel assembly. The vacuum pump assembly is respectively communicated with the vacuum cavity of the cylindrical vacuum outer tank body and the annular circulating cooling water cavity of the cylindrical vacuum inner tank body; according to the device, a heat one-way active transport structure is additionally arranged on the basis of partition heat radiation, so that the temperature control efficiency is improved, the uniformity of heat distribution is optimized, and accurate regulation and control of the temperature in a vacuum environment are realized.

The invention relates to a device for melting metal by means of solar energy, the device comprising a crucible (11) able to contain a liquid metal and a gas-tight enclosure (9, 13), wherein the enclosure contains the crucible, the crucible being in mechanical contact with the enclosure, wherein the enclosure comprises a first duct (7) configured for the introduction, into the enclosure and into the crucible, of divided solid metal, a second duct (14) configured for the removal, from the crucible and the enclosure, of liquid metal, and a third, optical duct (15) configured for the entry, into the enclosure and into the crucible, of sunlight (4), wherein the first duct comprises a first isolation valve (1.b) for gases, the second duct comprises a second isolation valve (1.c) for gases, and the third duct comprises a window (6) transparent to sunlight.

We provide a radiant tube heater that can be used not only in heating processes but also in cooling processes as needed. [Solution] The radiant tube heater 20 comprises a tube 22 with openings at both ends, a first cover body 45A and a second cover body 45B that close the openings at both ends, at least one electrical resistance heating element 30 provided inside the tube 22, a support member 35 provided inside the tube 22 to support the electrical resistance heating element 30, a gas inlet 47A for introducing furnace cooling gas into the tube 22, and a gas outlet 47B for discharging the furnace cooling gas introduced into the tube 22.

To provide a production method of a sintered body that can obtain a sintered body satisfying light transmissivity required as a dental prosthetic material by short time sintering without essentially requiring precise temperature control at a high temperature region and without depending on a content of a stabilization element of a zirconia composition.SOLUTION: A production method of a zirconia sintered body containing a stabilization element comprises: a first temperature rising step for rising temperature of a zirconia composition containing the stabilization element from a temperature rising start temperature up to a first arrival temperature between 800°C or higher and lower than 1400°C with a rate of temperature increase of 150°C / minute or more; a second temperature rising step for rising the temperature from the first arrival temperature up to a second arrival temperature between 1400°C or higher and lower than 1580°C with a rate of temperature increase of over 30°C / minute and less than 200°C / minute; and a holding step for holding the temperature at the second arrival temperature.SELECTED DRAWING: None

The invention relates to the technical field of semiconductor processing, and discloses an energy-saving double-furnace-body vacuum sintering furnace for a quartz waste liquid bottle for a semiconductor, which comprises a nested structure of a heat preservation drying furnace and a high-temperature sintering furnace, a rotary drying frame is arranged between the heat preservation drying furnace and the high-temperature sintering furnace, and the opening and closing of furnace doors are controlled through a guide rail driving mechanism respectively; the high-temperature sintering furnace adopts a molybdenum alloy lining; the vacuum pump combination realizes high vacuum, the furnace door adopts perfluoroether rubber triple sealing, the rotary drying frame and the sintering frame are respectively provided with a quartz boat and a lead screw guide rail driving mechanism to guarantee high-precision positioning, and during working, the two furnace bodies operate cooperatively, waste liquid bottles are dried and preheated in the heat preservation drying furnace firstly and then transferred to the high-temperature sintering furnace to be sintered. The vacuum interlayer is used for heat insulation, so that energy consumption is reduced, impurity volatilization rate is increased, and efficient and energy-saving recovery of the quartz waste liquid bottle is effectively realized.

The invention innovatively provides a vacuum equipment system with an up-down open type tube furnace, the tube furnace (2) can independently move up and down, a filtering system (3) of the tube furnace is connected with a quartz tube through a flexible connecting piece, and the connecting pieces at the two ends of the quartz tube can move up and down. The vacuum system comprises a vacuum gauge, a vacuum valve, a low-vacuum backing pump, a high-vacuum secondary pump and a connecting pipeline; the control system comprises a host, a monitoring and control program, a display screen, a temperature control and display device and the like. The up-down opening type tubular furnace vacuum system provided by the invention has a rapid cooling effect, and the working efficiency and the product quality are improved.

Disclosed is a pumping system with reduced contamination. A vacuum pump system includes a mechanical vacuum pump mechanism within a hermetic pump that hermetically isolates the pump mechanism from ambient air. A pump inlet is hermetically scaled to the hermetic pump housing. A pump outlet is hermetically sealed at one end to the hermetic pump housing and at the other end to an inlet of a Peclet seal tube. The vacuum pump system produces a vacuum in a vacuum processing chamber. A sweep gas source injects a sweep gas into at least one of (i) the hermetic pump housing and (ii) the inlet of the Peclet seal tube. The sweep gas and a process gas flow through the Peclet seal tube to substantially isolate against the backflow of the ambient air through the Peclet seal tube.

The invention relates to the technical field of vacuum heat treatment, in particular to a vacuum heat treatment furnace rapid cooling system and a vacuum furnace, comprising a driving pump, a liquid metal pipeline, an in-furnace heat exchanger, liquid metal, an out-furnace heat exchanger, a cooling water pipeline and cooling water; the in-furnace heat exchanger is positioned in the vacuum heat treatment furnace; the driving pump drives normal-temperature liquid metal, the liquid metal is conveyed into the in-furnace heat exchanger through the liquid metal pipeline, heat is absorbed, and high-temperature liquid metal is formed and reaches the out-furnace heat exchanger under driving of the driving pump; the cooling water pipeline conveys cooling water into the outside-furnace heat exchanger, the cooling water exchanges heat with the high-temperature liquid metal in the outside-furnace heat exchanger, and normal-temperature liquid metal is formed; through the special structural design, the characteristics of high heat conductivity and high boiling point of liquid metal can be utilized, the cooling rate of the rapid cooling system of the vacuum heat treatment furnace is increased, high pressure generated by high temperature in the system is reduced, and the probability that the rapid cooling system has safety accidents when water serves as a cooling medium to operate is reduced.

The utility model discloses a muffle furnace combined structure, and particularly relates to the technical field of muffle furnaces, the muffle furnace combined structure comprises a muffle furnace, a sealing box door is arranged on the outer end face of the muffle furnace, a heating cavity is arranged on the inner side of the sealing box door of the muffle furnace, and a first supporting plate and a second supporting plate are sequentially arranged in the heating cavity; supporting blocks are arranged in the middles of the two sides of the inner end of the heating cavity, supporting grooves are formed in the end faces of the supporting blocks, and supporting blocks are arranged on the outer end faces of the first supporting plates. During actual use, the first supporting plate and the second supporting plate can conveniently move in the heating cavity under the corresponding arrangement state of the supporting grooves, the bottom supporting blocks, the limiting supporting sliding grooves and the limiting supporting blocks, so that the first supporting plate and the second supporting plate can be conveniently mounted and dismounted according to the size of a crucible; and therefore, the crucible with a small size can be conveniently taken and stored, and the convenience of taking and operating the crucible by a worker is improved.

The utility model discloses a feeding device of a three-chamber vacuum furnace for casting, which is characterized in that a two-layer operating platform is provided with a feeding hole, the feeding device comprises a mounting frame arranged on the two-layer operating platform, the upper part of the mounting frame is provided with a transverse slide rail, the slide rail is provided with a lifting device, and the lifting device can move left and right along the slide rail; hooks are arranged on the lifting device and can move up and down, a protective net is arranged around the lower portion of the feeding hole to form a feeding channel, a feeding chamber is arranged at the bottom of the feeding channel, the feeding chamber is provided with a feeding chamber door, a discharging barrel capable of being connected with the hooks is placed in the feeding chamber, and a discharging chamber is arranged above the feeding channel. The feeding device and the three-chamber vacuum casting furnace are arranged into a whole, the occupied space is reduced, meanwhile, the feeding efficiency can be improved, the feeding stability is greatly improved, meanwhile, safety accidents caused by falling of alloy bars can be effectively prevented, the automation degree is greatly improved, and the labor cost is reduced.

The utility model discloses a multi-zone independent temperature control vacuum hot pressing furnace, which comprises a base and a top plate fixedly connected to the top of the base through a supporting rod, the top of the base is fixedly connected with a double-wall layer water tank, and the bottom of the inner cavity of the double-wall layer water tank is fixedly connected with an insulating frame. According to the multi-area independent temperature control vacuum hot pressing furnace, the cover plate and the upper graphite pressing plate are driven to move upwards by controlling the hydraulic telescopic rod, the cover plate can drive the supporting plate and the graphite platform to move upwards through the upper hook plate and the lower hook plate, and materials on the graphite platform are moved out of the double-wall-layer water tank; meanwhile, the graphite platform can drive a fixing plate to move upwards to make contact with a lower inclined panel, the lower inclined panel abuts against the fixing plate to drive the graphite platform to incline, the materials on the graphite platform slide out in an inclined mode, and therefore the hot-pressing materials can be automatically discharged, manual operation is not needed, the manual safety is guaranteed, and the working efficiency is improved. And the blanking efficiency of the hot pressing furnace is improved.

The utility model relates to the field of heating devices, in particular to a vacuum cavity heating device which comprises a vacuum cavity, a top plate, a heating furnace body, heat insulation pieces, fixing pieces, a graphite heating rod, a graphite heating sheet, a molybdenum wire heat conduction piece and a carrying table, the top plate is installed on the front side of the vacuum cavity, and the heat insulation pieces can be installed on the inner side of the vacuum cavity in a stacked mode and fixed through the fixing pieces. A plurality of graphite heating rods are mounted on the inner side wall of the heating furnace body; graphite heating sheets are mounted at the other ends of the graphite heating rods; a molybdenum wire heat conduction piece is mounted on the outer side wall of the heating furnace body; a carrying table is mounted in the middle section of the inner side of the heating furnace body; the heat insulation piece can reduce heat radiation and heat conduction transmitted by components to the maximum extent, ensure the temperature stability in the heating furnace body and improve the heating efficiency.

The utility model relates to the technical field of sintering devices, and discloses a low-energy-consumption fluoride vacuum hot-pressing sintering device which comprises a vacuum hot-pressing sintering furnace body, a fixed bin is fixedly connected to the outer portion of the vacuum hot-pressing sintering furnace body in a sleeved mode, and a PLC is fixedly installed on one side of the fixed bin. According to the vacuum hot-pressing sintering furnace, the vacuum hot-pressing sintering furnace body, the fixed bin, the movable sealing door, a first guide rail, an electric hoist, a limiting column, a first fixed plate and an electromagnetic lock are used in cooperation, so that the effect of vacuum hot sintering of fluoride can be achieved, and after the fluoride is subjected to hot sintering, the fluoride in a storage bin is taken and placed through a clamping frame; the vacuum hot-pressing sintering furnace body does not need to be cooled to take out fluoride, frequent cooling and heating of the vacuum hot-pressing sintering furnace body are avoided, the energy consumption of the vacuum hot-pressing sintering furnace body is reduced, the preparation cost is reduced, and the vacuum hot-pressing sintering furnace is convenient to use and practical.

The present invention relates to a radiant tube heater including: a tube provided with openings at both ends; a first cover body and a second cover body configured to close the openings at both ends; at least one electric resistance heating element provided in the tube; a support member provided in the tube and configured to support the electric resistance heating element; a gas inlet configured to allow furnace cooling gas to be introduced into the tube; and a gas outlet configured to discharge the furnace cooling gas introduced into the tube.

The present invention provides an electric heating device (1) comprising at least an electric furnace (2) having walls (2A, 2B) defining a space (3), a first row (4) of tubes (10) extending through the space (3), the tubes (10) having an inlet (11) and an outlet (12) outside the space (3), a second row (14) of tubes (10) extending through the space (3), the tubes (10) having an inlet (11) and an outlet (12) outside the space (3), and a first set (5) of electric radiant heating elements (20) disposed within the space (3), the first set (5) comprising electric radiant heating elements (20) disposed between the first row (4) and the second row (14) of tubes (10).

The invention relates to a holding device (11) for electrically heated steel pipes (15, 16, 17), comprising an annular center part (12) for receiving a first steel pipe (15) and an annular side part (13) for receiving a second steel pipe (16), wherein the annular center part (12) is connected to the annular side part (13). The end of one of the two steel pipes (15, 16) is supported in a cutout (19) in the furnace wall (18), and the end of the other steel pipe (15, 16) is held or supported only by means of the holding device (11).

The invention relates to a heating furnace pipe and a three-chamber continuous vacuum heat treatment furnace, and the heating furnace pipe comprises a furnace body which comprises four furnace walls arranged in a surrounding manner; the furnace hearth is arranged in the furnace body; the four groups of supporting assemblies are fixedly arranged on the four furnace walls respectively; the heating assemblies are fixedly arranged on the supporting assembly respectively to form four heating subareas, each heating assembly comprises two heating belts, each heating belt comprises an input section, an output section and a heating section connected with the input section and the output section, the input sections of the two heating belts are mutually overlapped, the output sections of the two heating belts are mutually overlapped, and the heating sections of the two heating belts are mutually overlapped. The heating sections of the two heating belts are symmetrically arranged and are respectively laid in a half area of the heating subarea; the four heating subareas are arranged, all-around heat radiation is provided, and the heating sections of the heating belts are symmetrically arranged, so that the whole heating subareas are more uniformly paved with the heating belts, the heating temperature of the whole heating subareas is more uniform, and the overall temperature uniformity in the furnace is improved.

The utility model relates to dental medical instrument technical field discloses a kind of zirconia denture crystallization furnaces, including base and crystallization furnace main body, the inside of the base is provided with feeding mechanism, the inside of the crystallization furnace main body is provided with gas control mechanism;The feeding mechanism includes motor one, the inside of the base is fixedly connected in the outside of motor one, the driving end of motor one is fixedly connected with disc, the left end of the disc is fixedly connected spiral protrusion, the inside of the base is fixedly connected with cylinder, the inner wall of the cylinder is slidably connected with sliding column, the right end of the sliding column is fixedly connected with rack plate.In the utility model, annular plate on placing tray can prevent zirconia denture from sliding or falling during transportation, after reaching specified position, sealing ring and heat insulation pad are in close contact, ensure the sealing property of heating chamber, reduce scald risk, improve work efficiency while automatic operation, reduce labor intensity.

The application discloses an aluminum phosphate powder material with radiation refrigeration performance and a preparation method thereof. The method comprises the following steps: step 1, according to the molar ratio of aluminum ions, phosphate ions and ethylene glycol 2:(1-4):(10-20), aluminum hydroxide, ammonium phosphate and ethylene glycol are weighed, the aluminum hydroxide and the ammonium phosphate are mixed and then put into a mortar, the ethylene glycol is added into the mortar, and after being fully ground, the mixture A is obtained through filtration and washing; step 2, the mixture A is put into a crucible and placed in a muffle furnace, the temperature is first raised from room temperature to 200-280 DEG C at a temperature rising rate of 3-5 DEG C / min, and then raised to 1000-1200 DEG C at a temperature rising rate of 5-8 DEG C / min, and the temperature is kept for 2-4 h to obtain the product B; and step 3, the product B is ground in a mortar, sieved and the aluminum phosphate powder material is obtained. The aluminum phosphate powder material prepared by the method has excellent radiation refrigeration performance.

The utility model relates to a lifting feeding spring type tray bracket mechanism for a vertical furnace, and belongs to the field of vertical vacuum furnaces. The problems that in the process of completing feeding and discharging operation of an existing vertical vacuum furnace, a charging tray topples over, and parts are damaged and other potential safety hazards exist are solved. According to the technical scheme, each guide component comprises a base, the bases are connected to a supporting frame, guide columns are arranged on the bases, adjusting screw rods are connected to the guide columns, the guide columns are sleeved with guide column sleeves, the guide columns are in sliding connection with the guide column sleeves, and protrusions are connected to the ends, away from the supporting frame, of the guide column sleeves; the bracket is provided with a protrusion, the protrusion is in clearance fit with a first through hole formed in the bracket in a penetrating mode, the protrusion is fixedly connected to the bracket, the bracket is connected to the furnace body bottom cover through a supporting plate, the guide column sleeve is sleeved with an elastic component of a hollow structure, the elastic component abuts against the position between the supporting frame and the bracket, and the protrusion is provided with a first through hole in a penetrating mode, and the first through hole is in clearance fit with an adjusting screw. The utility model is applied to the vertical furnace.