122 results about "Bell jar" patented technology

The invention discloses an Al-Ti-C-Ce intermediate alloy with titanium carbide as a Ti source and a C source and a preparation method and application thereof.The preparation method comprises the steps that titanium carbide powder and aluminum powder are mixed and subjected to ball milling to obtain core-shell structure composite powder with TiC coated with Al, the core-shell structure composite powder is subjected to compression molding to obtain prefabricated blocks, the prefabricated blocks are pressed into the bottom of an aluminum melt in batches through a graphite bell jar, and the aluminum melt is subjected to heat treatment to obtain the Al-Ti-C-Ce intermediate alloy with the Ti source and the C source. The preparation method comprises the following steps: adding an Al-30Ce intermediate alloy, carrying out first heat preservation at 760-850 DEG C, cooling to 700-750 DEG C, adding the Al-30Ce intermediate alloy, carrying out second heat preservation, deslagging and refining, and pouring into a mold to obtain the Al-Ti-C-Ce intermediate alloy; according to the Al-Ti-C-Ce intermediate alloy provided by the invention, A356 alloy grains are refined to 106 microns (ASTM 5 level), and a low-content system can still maintain the refining level that the grain size is smaller than 120 microns.

The utility model relates to the technical field of telex control and fluid transmission, in particular to an integrated electro-hydraulic pump, which mainly comprises a control valve island, an electro-hydraulic pump control unit, a connecting mechanism and a mounting mechanism, the connecting mechanism is arranged on the right side of the control valve island, the electro-hydraulic pump control unit comprises the connecting mechanism and the mounting mechanism, and the mounting mechanism is arranged on the right side of the control valve island. The connecting mechanism is arranged on the left side of the connecting mechanism. The high-power control motor and the multi-quadrant hydraulic pump are directly connected through the internal spline and the external spline, a coupler and a bell jar are removed, the axial distance is reduced by more than 30%, the total installed power of a single unit is more than 10 kW, the hydraulic pump is particularly suitable for being applied to occasions with medium power and high power, a coupler with large mass is removed, and the cost is reduced. The rotational inertia of the whole rotor is reduced, the response speed and the response frequency of the high-power pump control unit are improved, the transmission of the high-power control motor and the multi-quadrant hydraulic pump is more stable by adopting integral interpolation spline transmission, and the overall energy efficiency is improved.

The invention discloses an easy-to-clean antibacterial ceramic tile glazing device, relates to the technical field of glazing equipment, and aims to solve the problem that the glaze pouring range cannot be adjusted in the ceramic tile glazing process, so that the rotation consumption of glaze liquid is relatively large. According to the invention, a double-side glazing area is formed through the structural design of combining a glaze outlet flat nozzle with a glaze guide bar I and a glaze guide bar II which have the length equal to the diameter of a bell jar disc and are arranged in a crossed manner, and the glaze outlet flat nozzle structure is used for forming glaze liquid outlet limitation to form flat glaze distribution; the glaze liquid is continuously and bidirectionally applied in a double-side glazing area formed by the glaze guide bar I, the glaze guide bar II and the bell jar disc, and the glaze liquid and the double-side glazing area are combined to jointly form double-side continuous and uniform application so as to achieve absolute limitation on the glaze outlet amount and the glaze outlet area; namely, the continuous to-be-glazed ceramic tile can be subjected to double-side continuous glazing operation under the double limitation of the glaze output amount and the glaze output area in the glazing process, and the glazing device is suitable for glazing ceramic tiles with different sizes.

The invention discloses a diamond grain curing and sintering furnace, which relates to the technical field of metal powder processing and manufacturing, and comprises a base box body, a left bell jar, a right bell jar, an inner bell jar, a variable-pitch spiral heating wire, a heat exchange chamber, a liquid storage cylinder and a piston, a double-station structure is adopted, and the variable-pitch design of the heating wire is matched with convection to realize uniform heating of the temperature in a cavity; through a liquid storage cylinder, a piston and a heat exchange chamber, rapid heat exchange cooling is conducted through a heat conduction agent, and an atmosphere protection system (comprising a gas cylinder, an observation bottle and a sensor), an automatic bell jar lifting and rotating mechanism, an automatic piston lifting mechanism, a temperature sensor and the like are further arranged. The device has the beneficial effects of uniform heating temperature, accurate and controllable atmosphere, rapid cooling, high automation degree, safety, reliability, energy conservation and the like.

The invention relates to the technical field of electrolyte cleaning, and discloses an electrolyte cleaning system which comprises an anode unloading station, a tipping station, an anode scrap loading station, a pre-crushing station, a driving part, a shearing part, a hammering part, a cleaning part, a positioning part, a collecting part, a self-grinding part and an electrolysis bin, and the driving part is sequentially connected with the anode scrap loading station, the pre-crushing station, the shearing part, the hammering part and the cleaning part in series. The collecting part is located below the tipping station, the anode scrap loading station, the pre-crushing station, the shearing part, the hammering part and the cleaning part, a conveying piece is arranged between the autogenous grinding part and the electrolysis bin, the bottom surface of the driving part is slidably connected with a catenary, the lower end of the catenary is provided with a catenary bell jar, the catenary bell jar is detachably connected with a guide rod of an anode scrap group, and the hammering part is arranged right opposite to an output port of the shearing part. The cleaning part is arranged right opposite to an output port of the hammering part; the positioning parts are respectively arranged in the pre-crushing station, the shearing part, the hammering part and the cleaning part; electrolytes on the surfaces of multiple anode scrap groups can be cleaned at the same time, and the cleaning efficiency is improved.

The present invention relates to the technical field of mold design, and specifically to a casting mold for casting accessories of a bell jar furnace, which includes a mold opening and closing device. The mold opening and closing device includes a pair of support plates located at the upper and lower ends respectively, and the support plates are fixedly installed through connecting columns. A casting mold for casting accessories of a bell jar furnace can quickly replace different types of cavities by directly replacing the upper mold base and the lower mold base, so as to produce corresponding castings. In this way, structures such as the mold opening and closing device can be reused to reduce the mold development cost. Moreover, the upper mold base and the lower mold base can also be quickly fixed through a limit connection device, thereby improving the cavity replacement efficiency and facilitating flexible production quickly. It solves the problems that the existing molds cannot reuse structures such as mold opening and closing and the operation of replacing cavity models is cumbersome, and can effectively reduce the mold development cost and improve the cavity replacement efficiency.

The utility model discloses a bell jar with a dustproof structure, which comprises a bell jar main body, the top end of the bell jar main body is provided with an assembly connecting hole, the inner side of the assembly connecting hole is detachably provided with a plurality of sealing clamping plates, and the sealing clamping plates are fan-shaped and are distributed in a circular array around the circle of the assembly connecting hole. A clamping groove is formed in the outer side of the sealing clamping plate, the sealing clamping plate is clamped to the inner side of the assembly connecting hole through the clamping groove, a contact plate is installed on the inner side of the clamping groove, an adjusting spring is arranged between the inner side of the contact plate and the sealing clamping plate, and the two ends of the adjusting spring are fixedly connected with the contact plate and the sealing clamping plate respectively. The gap between the sealing clamping plate and the transmission shaft inserted in the assembly connecting hole is adjusted through the contact plate and the adjusting spring, it is guaranteed that the sealing clamping plate is attached to the outer surface of the transmission shaft all the time, the gap between the assembly connecting hole and the transmission shaft is sealed, and external dust is prevented from entering the bell jar body.

The utility model belongs to the technical field of glaze pouring equipment, and particularly relates to a bell jar height adjusting device which comprises a bell jar, a bracket and a supporting stand column, the bell jar is fixedly connected to the bracket, the bracket is connected to the supporting stand column in a lifting mode through an adjusting assembly, an adjusting rack is vertically arranged on the supporting stand column, and the adjusting assembly comprises an adjusting gear. The adjusting gear is meshed with the adjusting rack, the adjusting gear is connected with a rotary driving piece, and a locking assembly is further arranged on one side of the adjusting assembly. The bell jar is fixedly connected to the bracket, the bracket is connected to the supporting stand column in a liftable mode through the adjusting assembly, the adjusting rack is vertically arranged on the supporting stand column, the structure is simple, adjustment is more convenient, the height of the bell jar is adjusted through transmission of the gear and the rack, the gear can be directly rotated to enable the bell jar to ascend and descend, and the bell jar is convenient to adjust. And the lifting of the bell jar can be quickly adjusted.

The invention provides a high-conductivity free-cutting copper alloy material and a preparation method thereof, and belongs to the technical field of alloy smelting. The preparation method of the high-conductivity free-cutting copper alloy material comprises the following steps: (1) smelting: heating and melting cathode copper, and covering with crystalline flake graphite in the melting process; and boron-copper alloy deoxidation, high-purity tellurium and high-purity iron powder are added. A graphite bell jar is used for adding. The temperature is increased to 1200-1250 DEG C, and heat preservation is conducted for 15-30 min so that alloy elements can be homogenized; adjusting the furnace temperature to 1170-1190 DEG C, and casting into an ingot through a high-purity graphite mold; (2) hot extrusion forming; (3) pickling and hydraulic drawing; and (4) straightening and sizing to obtain the required copper alloy material. According to the copper alloy material, at the room temperature (25 DEG C), the conductivity is larger than or equal to 90% IACS, the machinability is 80% or above higher than that of an HPb63-3 material in the same state, and the tensile strength is larger than or equal to 350 MPa when the cold machining deformation is 50%.

The invention provides a bell jar lifting part sleeve lifting structure for a fluorination furnace, which comprises a device main body, the device main body comprises a positioning block, the upper side and the lower side of the positioning block are respectively provided with a lifting block, the lifting block comprises a first connecting block, the first connecting block is connected with a second connecting block through a pin shaft, and the second connecting block is connected with a lifting arm through a hexagon socket cap screw. A fixing block for an adjusting bolt is arranged behind the second connecting block and connected with the second connecting block through the adjusting bolt, the position of the second connecting block is adjusted, and the connecting precision is guaranteed. The lifting arm is driven by a lifter, the lifter comprises a lifting rod, the lifting arm moves along the lifting rod, a nut seat is arranged at the lower end part of the lifting arm, and the nut seat is connected with the lifting rod through a nut. No complete rigid connection is used beside the connecting part of the lifting mechanism and the bell jar, assembling is more convenient, the hinge pin is used for connection, and the impact force generated when moving begins can be reduced during bearing ascending or descending.

The utility model relates to the technical field of steering ball sockets, and discloses a sealed low-resistance steering ball socket assembly, which solves the problem of poor sealing effect of the existing steering ball socket, and comprises a steering ball socket body, the steering ball socket body is composed of a bell jar, a retainer, a plurality of steel balls, a starlike sleeve, an input shaft, an output shaft, a sealing cover, a first hoop and a second hoop, the bell jar is connected to one end of the output shaft, a plurality of outer raceways are formed in the inner surface of the bell jar, the starlike sleeve is connected to the interior of the bell jar, and inner raceways are formed in the outer surface of the starlike sleeve; the retainer and the steel ball are connected between the bell jar and the starlike sleeve, the input shaft is connected with the starlike sleeve, the bell jar and the input shaft are sleeved with the sealing cover, the first hoop and the second hoop are connected to the two ends of the sealing cover respectively, and the sealing cover is composed of an outer sealing sleeve and an inner sealing sleeve; by means of the steering ball socket assembly, the overall sealing performance can be improved, the possibility that the sealing cover is damaged is reduced, then lubrication failure is avoided, and the service life is prolonged.

The utility model provides a flange used for a bell jar standing cavity and the bell jar standing cavity, and the flange used for the bell jar standing cavity comprises an annular flange main body and an external connection part used for being connected with an external base, the external connecting part is arranged on the outer side wall of the flange main body; an annular butt joint groove used for being in butt joint with a bell jar standing cavity is formed in the upper end of the inner side wall of the flange body, and the bottom wall of the annular butt joint groove is connected with the inner side wall of the flange body through a first inclined face. The first inclined face is used for being matched with the bottom end face of the bell jar standing cavity to form a first groove used for welding when the bell jar standing cavity is embedded in the annular butt joint groove. According to the utility model, the effective length of the weld joint at the joint of the flange and the bell jar standing cavity is increased, so that the stress level of the weld joint in unit length is effectively reduced, the connection stability between the flange and the bell jar standing cavity is enhanced, and the overall rigidity of a final product is improved.

The utility model belongs to the technical field of detection equipment, and discloses a bell jar coaxiality and flatness detection device, which comprises a base, a center rod is arranged on the base, two extension rods are horizontally arranged on the center rod, and dial indicators are arranged at the end parts, far away from the center rod, of the extension rods; the center rod is connected with the base through a bearing; the extension rod is connected with the center rod through a screw arranged on the center rod in a penetrating mode. The two extension rods are positioned on the same central surface of the central rod; a boss is arranged on the base, and the outer edge of the boss is circular; the device can efficiently detect the coaxiality and flatness of the bell jar, and is simple in structure and convenient to operate.

The utility model discloses a bell jar fixing device and have its glaze showering device relates to the technical field of porcelain tile glaze processing, include: glaze showering bucket, the glaze showering bucket has the glaze outlet of downside and the glaze bucket opening of upside, the glaze pipe is arranged above the glaze showering bucket, the fixed frame is including the glaze pipe support, the fixed part, the fixed part includes the first connecting sleeve and the second connecting sleeve, the second connecting sleeve includes the pipe section, the bending section and the pipe section in proper order, through the fixed part for fixing glaze pipe and glaze pipe support, the pipe section and the pipe section between the pipe section of fixed part form certain angle because of the bending section, and the glaze pipe passes the pipe section, the bending section in proper order and then stretches out from the pipe section, not only convenient adjustment glaze pipe's output end's pointing, and this design still can ensure that the vibration that glaze bucket input end formed is when the corresponding bending section position is eliminated, ensures that the vibration of glaze pipe's output end can be enough alleviated even to eliminate.

The utility model discloses a sealing structure for a discharge port of a hanging tank, relates to the technical field of concrete hanging tanks, and aims to solve the problem that high-flow-state self-compacting concrete leaks from the discharge port in the hanging tank transportation process. The sealing structure comprises a soft annular taper sleeve sleeved on the discharge port of the hanging pot, the soft annular taper sleeve is sleeved on the discharge port of the hanging pot through an insertion cavity at the top, and a sealing washer is formed at the bottom of the discharge port of the hanging pot, so that a gap is prevented from being generated between the discharge port and the radial gate. In order to prevent relative sliding, an internal fixing piece and an external fixing piece are further structurally designed. In addition, the arc door gap sealing strip integrally formed with the soft annular taper sleeve is arranged at the bottom of the soft annular taper sleeve, and concrete is further prevented from leaking from the split arc door gap. According to the sealing structure, the sealing performance of the discharging port of the hanging tank is effectively improved, the material leakage phenomenon is reduced, and the sealing structure is suitable for transportation and pouring of high-flow-state self-compacting concrete.

The utility model provides a gas-phase heavy doping device which comprises a quartz clock cover, the quartz clock cover is provided with an overflow opening, and the overflow opening is arranged opposite to a to-be-doped object; the quartz clock cover comprises a cover shell side wall, a first flow guide part is arranged at the end, close to the overflow opening, of the cover shell side wall, and the first flow guide part is bent towards the interior of the cavity of the quartz clock cover along the cover shell side wall so as to reduce the opening size of the overflow opening. By adopting the doping device, clean protective gas on the outer side of the bell jar is blown to the liquid level from top to bottom, a rotating vortex is formed below the outer side of the frustum, and the vortex can realize gas sealing, so that mixed gas containing dopants on the inner side of the bell jar is difficult to flow into or diffuse to the outer side of the bell jar, the use of the dopants can be effectively reduced, the cost is reduced, and the service life of the bell jar is prolonged. And the doping efficiency is improved.

The application discloses a kind of methods for detecting the transmittance of quartz reaction chamber of epitaxial equipment, including but not limited to esther200C, esther200L, LPE 3061S and LPE2061S epitaxial equipment, use external color camera with PLC industrial computer equipment to shoot the image of bell jar observation window and temperature measurement window area, select the light transmission area for analysis, divide the effective light transmission area into several microcircuits, calculate the RGB value of observation hole in each microelement area and the average value ratio of blue component and green component. By comparing the difference between the RGB value in the region and the standard value, and comparing the B / G ratio with the standard value set, the state of bell jar transmittance is identified.

The utility model relates to the technical field of flow regulation, in particular to an automatic flow regulation device of a bell jar type gas flow standard device, which comprises an automatic regulation device mounting total component, and a support plate is fixedly connected to the inner ring surface of the automatic regulation device mounting total component. According to the automatic flow adjusting device of the bell jar type gas flow standard device, through dislocation of a first circulation opening and a second circulation opening, the flow can be opened and closed, the flow can be adjusted, and therefore efficient automatic flow adjustment can be conducted; the clamping plate is fixedly connected with the surface of the side edge of the automatic adjusting device installation total component, the reset spring is inserted into the surface of the inner ring of the clamping plate in a limiting mode, and the automatic adjusting device installation total component can be installed in the bell jar type gas flow standard device in a clamping mode after the transmission rod is pushed by the reset spring.

The utility model belongs to the technical field of aerospace, and discloses a vacuum test device. The vacuum test device comprises a bell jar, a sealing element, a bottom plate, a first flange ring and a fastener, the bell jar comprises a bell jar body and an outer flange, the outer flange is arranged at an opening of the bell jar body in the circumferential direction of the bell jar body, the bell jar body is buckled on the bottom plate, the sealing element is clamped between the bottom plate and the outer flange, and the first flange ring is connected with the fastener. The bell jar body is sleeved with the first flange ring, at least part of the first flange ring abuts against the outer flange, the fastener is arranged on the first flange ring in a penetrating mode and is in threaded connection with the bottom plate, and when the airtight cavity is vacuumized through the through hole, the first flange ring is in threaded connection with the bottom plate, so that the airtight cavity is formed by the bell jar body and the bottom plate in a surrounding mode, and a through hole is formed in the bottom plate and communicated with the airtight cavity. The air leakage rate of the closed cavity is reduced, and the vacuumizing efficiency is improved; moreover, when the airtight cavity is inflated through the through hole after the test is finished, the risk that the bell jar is jacked up due to too high inflation speed is effectively prevented, and the safety of the device is enhanced.

The utility model provides an annular waste heat recovery system of a bell jar type annealing furnace. Comprising an annealing furnace, a first heat exchange tile block and a second heat exchange tile block are clamped to the bottom of the inner wall of the annealing furnace through clamping rods, and rectangular heat exchange grooves are formed in outer side shells of the first heat exchange tile block and the second heat exchange tile block at equal angles; mounting grooves matched with the clamping rods are formed in the inner wall of the first heat exchange tile block and the inner wall of the second heat exchange tile block at equal angles, hole grooves are formed in the middle sections of the mounting grooves, and the hole grooves located in the first heat exchange tile block and the second heat exchange tile block penetrate through the first heat exchange tile block and the second heat exchange tile block correspondingly; and heat exchange holes are formed in the top ends of the mounting grooves. The annular waste heat recovery system of the bell jar type annealing furnace solves the problems that an existing bell jar type annealing furnace is single in structure and high in energy consumption, waste heat of the annealing furnace is difficult to recycle, and energy is wasted.

The application provides a powder metallurgy brake pad friction block sintering method, which comprises the following steps: providing a sintering tool and a pressurized bell jar furnace for matching the sintering tool; placing the friction block in the interior of the sintering tool; supplying heat source to the interior of the sintering tool through a heat supply pipe; after sintering and forming, cooling, taking out the finished product, and obtaining the sintered friction block; wherein the sintering tool comprises an upper die plate with a second heating cavity in the interior and a lower die plate with a third heating cavity in the interior; the sintering tool capable of integrally forming the friction block is arranged, the shape of the product after sintering is uniform, the assembly size is stable, and the product does not need to be machined again, so that the production efficiency is improved, and the stability of the product quality is ensured; the second heating cavity and the third heating cavity wrapped outside the die cavity are arranged, the first heating cavity is matched, the interior and the exterior are heated together, the heating effect is further improved, and the function of saving energy is achieved.

The utility model belongs to the technical field of anode lifting appliances, and particularly relates to a double-pull anode lifting appliance device, which comprises a bearing beam and a main lifting lug, a dismounting structure is arranged below the bearing beam, the dismounting structure comprises a dismounting mechanism and an adjusting mechanism, the dismounting mechanism comprises an adjusting box, an adjusting plate, a pull rod, a wedge-shaped plate and a mounting block, the inner wall of the adjusting box is slidably connected with two ends of an adjusting plate, and one side of the adjusting plate is connected with one end of a pull rod. According to the double-pull anode lifting appliance device, an anode bar can be quickly and conveniently disassembled and assembled, the stability of the anode bar after being fixedly installed can be effectively improved, an installation block and a bell jar can be quickly and conveniently disassembled and assembled, then the double-pull anode lifting appliance device can be better used, and the problems that the bell jar, the installation block and the anode bar cannot be quickly and conveniently disassembled and assembled, and the service life of the bell jar, the installation block and the anode bar is shortened are solved. And the problem that the anode bar cannot be stably fixed through the stainless steel round steel pipe is solved, and the working efficiency of the lifting appliance device is improved.

An improved bell jar insulator comprises an upper gold piece, an insulator and a lower gold piece which are fixedly connected in sequence, the insulator comprises an insulator main body and a first bell jar which is integrally formed with the insulator main body, and the insulator is made of epoxy resin; a protective outer cover is arranged on the upper gold piece at the upper end of the insulator, the protective outer cover is detachably connected with the upper gold piece, the protective outer cover is made of an epoxy glass fiber material, and the diameter of the outer cover bottom of the protective outer cover is larger than that of the first bell jar bottom of the first bell jar. The utility model has the advantages that the use cost is low, the insulator cannot burst, and the mechanical property of the insulator can be obviously improved.

The invention discloses a welding seam reinforcing process for a bell jar standing cavity and application of the welding seam reinforcing process, and the welding seam reinforcing process comprises the steps of pretreating the surface of a welding seam and reinforcing the welding seam by adopting a non-metal composite material. After the battery production equipment is reinforced through the weld joint reinforcing technology, the corrosion resistance, the pressure resistance, the fatigue resistance and the mechanical performance of the equipment can be remarkably improved, preventative reinforcement can be conducted on the production equipment, and service life prolonging reinforcement can be conducted on in-service production equipment.

The utility model discloses an energy -saving polycrystal silicon reduction furnace bell jar, including reduction furnace bell jar, it is jacketed structure, is equipped with inner heat -insulating bushing in the inner wall of reduction furnace bell jar, and the inner heat -insulating bushing will be separated to form the preheating chamber to the inside of reduction furnace bell jar and the inner wall side close to it, and the bottom of inner heat -insulating bushing is equipped with material inlet, and the top is equipped with material outlet, and the material is sent into the inner heat -insulating bushing and is preheated and is sprayed into the reduction furnace bell jar from the material outlet of top prearranged position.

A positioning device of an epitaxial furnace comprises a first positioning piece, a second positioning piece and a third positioning piece, the first positioning piece is fixed to the top surface of a flange through a connecting structure, and a mounting hole is formed in the positioning piece; the second positioning piece is located in the mounting hole, and the second positioning piece is used for fixing the distance between the top surface of the downstream end of the quartz cylinder and the top surface of the flange, so that the quartz cylinder is positioned at the corresponding position. The distance between the top surface of the downstream end of the quartz cylinder and the top surface of the downstream end of the quartz bell jar is fixed by arranging the first positioning piece fixed on the top surface of the flange and positioning one end in the mounting hole of the first positioning piece and positioning the other end on the top surface of the downstream end of the quartz cylinder; therefore, the position of the quartz cylinder can be quickly fixed at the corresponding position, the position of the quartz cylinder does not need to be adjusted for multiple times, the positioning accuracy of the position of the quartz cylinder is improved, and the positioning accuracy of the position of the reaction chamber and the production process efficiency are further improved.

The utility model discloses a tar collecting structure of a gas diffusion bell jar, which relates to the technical field of gas furnace equipment transformation and comprises a diffusion pipe and a rainproof cap, the rainproof cap is positioned above a diffusion port of the diffusion pipe, and a conical cap for collecting tar is arranged in the rainproof cap. The edge of a bottom opening of the conical cap is fixedly connected with the periphery of the inner wall of the rainproof cap, a circle of the bottom opening of the rainproof cap is fixedly connected with an annular groove, a plurality of through holes are formed in the side, close to the bleeder, of the annular groove, and the through holes fixedly communicate with chutes. According to the coal gas tar collecting device, coal gas rises into the rain-proof cap through the diffusing opening and then is blocked by the conical cap, tar is condensed, the tar slides down into the annular groove under the action of gravity and then flows back into the diffusing pipe through the through holes and the chutes, and therefore the good coal gas tar collecting effect is achieved.

This invention relates to the field of mechanical automation assembly and coking equipment technology, specifically to a coal charging hole cover assembly device and method for use in sealed coke oven environments. It includes an annular rotary base and indexing turntable, a traveling pallet equipped with positioning columns and pneumatic self-centering claws, multiple workstations, and an industrial control computer. The device utilizes the indexing turntable to drive the clamped coal charging hole cover blank, which sequentially flows between workstations such as tamping and filling, welding, feeding and grinding, and bell jar testing. Its core is to achieve continuous flow of the workpiece based on a single reference point using the traveling pallet, and to utilize a positive pressure dustproof air curtain to blow away scattered refractory dust. This invention abandons the traditional multiple lifting method, overcomes the secondary clamping errors caused by realignment in harsh environments, ensures the cleanliness of the clamping surface, and improves the dimensional and positional accuracy of the workpiece throughout the assembly process.

The utility model discloses a bell jar uniform cup and a bell jar type glaze pouring device.The bell jar uniform cup comprises a cup body and a discharge port, the cup body is provided with a cup opening, the cup opening is used for allowing glaze slip to flow in, the discharge port is formed in the side wall of the cup body, and the discharge port is used for discharging the glaze slip. The discharge outlet is formed in the side wall of the cup body, so that the glaze slip outflow mode is changed, the glaze slip flows out of the discharge outlet of the cup body, floating objects are effectively blocked in the cup body, the glaze pouring quality is improved, the structure is simple, and practicability is high.

The invention discloses a waste heat gradient utilization system of a polycrystalline silicon reduction furnace, relates to the technical field of polycrystalline silicon production, and mainly aims to improve the waste heat utilization rate. According to the main technical scheme, the waste heat gradient utilization system for the polycrystalline silicon reduction furnace is characterized in that a second flash tank is connected to an inlet of a bell jar cooling water jacket of the reduction furnace through a first conveying pump, and an outlet of the bell jar cooling water jacket of the reduction furnace is connected to a third flash tank; the first flash tank is connected to a tail gas pipe jacket cooling water inlet of the reduction furnace through a second delivery pump, and a tail gas pipe jacket cooling water outlet of the reduction furnace is connected to the first flash tank; the third flash tank is connected to a steam inlet of the generator set through a first pipeline, and the third flash tank is connected to the second flash tank through a second pipeline; the first flash tank is connected to an inlet of a medium-pressure steam user, and an outlet of the medium-pressure steam user is connected to the second flash tank; the second flash tank is connected to an inlet of the low-pressure steam user, and an outlet of the low-pressure steam user is connected to the second flash tank.