165 results about "Bell jar" patented technology

The utility model discloses a polycrystalline reduction starting device and a microwave power supply heating system, and relates to the technical field of polycrystalline silicon, a polycrystalline reduction furnace comprises a reduction furnace base and a bell jar which are detachably connected, the polycrystalline reduction starting device is characterized in that the tail of a microwave energy feedback device is connected with a microwave transmission device, and the microwave transmission device is used for being connected with a microwave emission device; the microwave energy feedback device is installed on the surface of the bell jar and guides microwave energy into the polycrystalline reduction furnace to heat the silicon core. The microwave energy feedback device introduces microwave energy into the reduction furnace to heat the silicon core, so that the resistance value of the silicon core can be reduced, the silicon core can be subsequently subjected to breakdown start with lower voltage, microwave heating can be started at low voltage, the phenomenon of discharge sparking in the reduction furnace is avoided, an insulating part at the bottom of the reduction furnace is prevented from being damaged, and safe operation of equipment can be ensured; and other materials or impurities cannot enter the reduction furnace through microwave heating, so that the environment of the reduction furnace is prevented from being polluted, and the purity of generated polycrystalline silicon is prevented from being reduced.

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 invention discloses a split dovetail type mechanical sealing device which comprises a rotating shaft, a sealing end cover, a static oil deflector ring and a movable oil deflector ring, the rotating shaft is arranged on the sealing end cover in a penetrating mode, and a sealing bell jar surrounding the periphery of the rotating shaft is arranged on the inner side of the sealing end cover; the static oil deflector ring, the movable oil deflector ring and the sealing bell jar are sequentially nested from inside to outside, a plurality of dovetail type damping oil sheds are arranged on the inner wall of the sealing bell jar, dovetail parts extending towards the two sides are arranged at the inner diameter positions of the dovetail type damping oil sheds, oil blocking ring grooves in one-to-one correspondence with the dovetail type damping oil sheds in position are formed in the outer wall of the movable oil deflector ring, and the dovetail parts extend into the oil blocking ring grooves. An oil throwing hole is formed in the outer wall of the movable oil retainer, an oil return hole is formed in the bottom of the sealing bell jar, and the oil return hole is communicated with an engine base bearing bush box oil pool. According to the split dovetail type mechanical sealing device, the problem of oil leakage of a shaft seal oil baffle caused by high oil level and high oil pressure in a bearing bush of a rotating machine is effectively solved, the problem of wear failure is avoided, and the service life is long.

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 utility model relates to the technical field of hard engineering plastic bell jar type insulators, and discloses a hard engineering plastic bell jar type insulator, which comprises a structural iron cap, an insulator is sleeved in the structural iron cap, and a steel foot is sleeved in the insulator. According to the hard engineering plastic bell-jar-shaped insulator, through the arrangement of the structural iron cap, the steel foot and the insulator, engineering plastic, the iron cap and the steel foot are subjected to injection molding to form an integrated structure by a special mold through an injection molding machine. The insulator with the structure is high in insulator strength, light in weight and excellent in electrical performance, avoids the problems of zero value of a traditional porcelain insulator and spontaneous explosion of a glass insulator, and greatly reduces the maintenance workload. The problems that an iron cap and a steel foot are bound into a whole through a cement adhesive in the prior art, maintenance in a water pool is needed, the process is tedious, and the yield is low are solved, the one-time forming process is simple, the yield is high, the weight is light, and the iron cap is an ideal upgraded product and has good application and popularization prospects.

The invention provides an intelligent residual coal gas recovery system and method for a coal-fired glass production line, and relates to the technical field of glass manufacturing, and the method comprises the following steps: when a reversing instruction is received, controlling a bell jar of a coal exchange machine to move, and enabling residual coal gas in a branch flue to flow into a coal gas storage tank through a bypass flue for storage, cutting off the communication between the coal exchange machine and the main flue, enabling the coal gas stored in the coal gas storage tank to flow into the coal exchange machine after the movement of the bell jar is completed, and cutting off the communication between the coal exchange machine and the main flue when the gas content in the bypass flue is higher than the content threshold value or the temperature in the branch flue is higher than the temperature threshold value; the residual gas in the branch flue is stopped from flowing into the gas storage tank through the bypass flue, the coal exchange machine and the main flue are communicated again, finally, the gas stored in the gas storage tank is stopped from flowing into the coal exchange machine, and reversing of the coal exchange machine is completed. The device has the beneficial effects that all residual coal gas can be collected to the greatest extent in the reversing process of the coal exchange machine, and the waste gas utilization 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 relates to a digital balance control method for transformer hanging cover construction, which aims at the cover lifting and falling processes of a transformer bell cover, and realizes the detection of an unbalanced inclination angle of the bell cover by installing a three-axis angular acceleration sensor in the center of the top of a transformer. The Beidou RTU modules are installed on a crane lifting hook and four lifting points on the upper portion of the transformer to achieve detection of space coordinate values of the lifting hook and the lifting points, software data analysis is conducted according to obtained parameters to obtain a conclusion, the telescopic amount of chain hoists in the four directions is automatically controlled, and therefore intelligent leveling of the transformer bell jar in the rising and falling process is achieved. Errors and dangerousness caused by human factors are avoided, the safety of construction operation is improved, and meanwhile the efficiency and precision of whole hanging cover construction are improved.

The novel double-air-inlet circulating fluidized bed boiler air distribution device comprises split air caps and graded air distribution plates, the air caps are evenly distributed on the air distribution plate on each layer, each air cap comprises an air pipe and a bell jar, the bottom end of each air pipe is welded to the corresponding air distribution plate, first through holes are formed in the top of each air pipe in a layered mode, and the top of each air pipe is provided with a second through hole. First through holes are formed in the top of the air pipe and evenly distributed in the top of the air pipe, the top of the air pipe is sleeved with the bell jar, the top of the bell jar is welded to the air pipe in the circumferential direction, air outlets are evenly formed in the bottom of the bell jar in the circumferential direction, and the end face, located below the air outlets, of the bell jar is installed on the air pipe in a sealed mode. And the worn air cap is more convenient to replace. The bell jars with different numbers of holes are arranged on different layers of air caps, so that the overall air volume distribution is more uniform, the material fluidization is more balanced, the local high temperature is reduced, the generation of nitrogen oxides is reduced, the design structure is simpler, the overhaul and maintenance are simpler and more convenient, and the overhaul cost is lower.

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 drilling machines for machining bell jar side face holes, in particular to a drilling machine for machining bell jar side face holes, which comprises a drilling machine base, a twist drill, a drilling machine and a bell jar component, the drilling machine is detachably and fixedly connected onto the drilling machine base, the twist drill is detachably and fixedly connected onto the drilling machine, and the bell jar component is fixedly connected onto the drilling machine base. A supporting column is fixedly connected to the drilling machine base, a driving disc is rotationally connected to the supporting column, a driving plate is hinged to the driving disc, a first linkage plate is hinged to the end, away from the driving disc, of the driving plate, and a clamping assembly for positioning and clamping a bell jar component is connected to the end, away from the driving plate, of the first linkage plate. And one side of the clamping assembly is connected with an adjusting assembly for adjusting the drilling height of the bell jar part. According to the technical scheme, the operation steps of the bell jar component are simplified, the labor intensity of operators is reduced, and therefore the machining efficiency is improved.

The invention relates to a microfiltration container (2) comprising a base (1) for a microfiltration container (2), said container being adapted to accommodate at least one microstrainer (3) and forming a fluid passage forcing a fluid flowing from a fluid inlet (4) to a fluid outlet (5) to flow through said microstrainer (3); wherein the base (1) is an integral main body, namely, the base (1) is made into a single piece; wherein a micro-filter seat (6) is formed in the base (1) for accommodating and fixing the at least one micro-filter (3); wherein at least one first valve half-chamber (7) is formed in said base (1), the at least one first valve half-chamber being adapted to accommodate a first movable valve element (8) adapted to be moved from a valve open position to a valve closed position; wherein the at least one first valve half-chamber (7) comprises at least one first abutment surface (9) for sealing the movable valve element (8); wherein the microfiltration container (2) comprises a container bell (28); wherein the container bell (28) comprises a cylindrical bell body (42), in which a first lower end of the bell body is sealingly connectable to the base (1), and in which an upper opposite end of the bell body is closed by a bell cap (43).

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 discloses a sensor support for a bell jar type electric heating furnace, which comprises a bottom plate, a first support and a second support are arranged on the bottom plate, and the first support and the second support are longitudinally arranged and distributed at two opposite ends of the bottom plate; an inserting hole is formed in the upper end of the first support and extends into the first support, an auxiliary positioning hole is formed in the side wall of the first support, the formed inserting hole is not limited by the diameter, and the maximum size specification of a sensor needed by a bell jar type electric heating furnace can be adopted. The sensor is longitudinally limited through the arranged vertical toggle clamp, the height of the second support is adjusted according to the height of the sensor, the positioning columns can be inserted into the arranged insertion holes, and the auxiliary positioning holes are distributed around the insertion holes in an annular array mode. The positioning columns are matched with the straight push rods to transversely limit the sensor, so that the stability of the mounted sensor is ensured.

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.