839results about How to "Uniform pressure" patented technology

The utility model discloses a chemical mechanical polishing and planarization system, which at least comprises a polishing head. A plurality of air holes are formed in the lower surface of the hard disc, and a third air cavity communicated with the air holes is formed in the hard disc; at least part of the elastic unit is of an annular structure, the elastic unit is connected with the polishing head body and the hard disc, and a second air cavity is defined by the polishing head body, the elastic unit and the hard disc; a retaining ring; when the third air cavity is in a negative pressure state, the lower surface of the hard disc can make contact with and adsorb the wafer substrate, and the pressure in the second air cavity is controllable, so that the elastic unit is driven to flexibly move, the hard disc and the wafer substrate are assisted to float, and chemical mechanical polishing of the wafer substrate is achieved. The hard drive in the hard disc solves the problem that when the flexible film drives the wafer substrate to polish, the flexible film is pulled to cause fracture or elastic modulus change under the severe polishing condition, and the service life of the flexible piece is prolonged.

The invention discloses an electric reactor with internal coil stabilization and auxiliary heat dissipation, and relates to the technical field of coil stabilization, the electric reactor comprises a base, the top surface of the base is fixedly connected with an air-core electric reactor body, the outer surface of the air-core electric reactor body is provided with a coil body, and the top surface of the base is provided with a coil stabilization mechanism for preventing the coil from loosening. An auxiliary heat dissipation mechanism used for assisting heat dissipation of the reactor is arranged on the top face of the base, the coil stabilizing mechanism can clamp a loose coil, pressure can be applied more evenly through clamping and fixing, the coil is more stably fixed, the consistency of the shape and performance of the coil can be kept, and the service life of the reactor is prolonged. The clamping device can avoid direct compression and damage to an insulating layer of the coil, the insulating performance of the coil can be protected, the auxiliary heat dissipation mechanism can scrub the interior of the electric reactor, remove dust and sundries in the electric reactor, reduce heat resistance, improve heat dissipation efficiency and keep the electric reactor to operate within the normal working temperature range.

The invention relates to the field of garment processing equipment, and discloses an automatic ironing device for garment processing and production, which comprises an ironing chamber, the inner top of the ironing chamber is fixedly provided with a concentric-square-shaped conveying belt, the bottom end of the concentric-square-shaped conveying belt is uniformly provided with a plurality of groups of clamping mechanisms, and one side of the inner part of the ironing chamber is provided with a steam spraying mechanism. A steam spraying mechanism is arranged on one side of the interior of the ironing chamber, an ironing mechanism is arranged on the other side of the interior of the ironing chamber, the steam spraying mechanism comprises a fixing frame, the fixing frame is fixedly installed on one side of the interior of the ironing chamber, the ironing mechanism comprises a base, and the base is fixedly installed on the other side of the interior of the ironing chamber. The whole ironing process is automatically completed from feeding, clamping, steam spraying, ironing and discharging of clothes, a worker only needs to place the clothes to be ironed below the clamping mechanism, follow-up operation is automatically carried out by the equipment, the zigzag conveying belt automatically conveys the clothes to move among different working procedures in the ironing chamber, the manual operation link is reduced, and the working efficiency is improved. And the production efficiency is improved.

The invention discloses an intelligent wood structure beam gluing and pressure maintaining method based on wood material characteristics. A plurality of continuous gluing and pressure maintaining mechanisms are used for providing gluing pressure for different parts of a wood plate composed of a plurality of glued and to-be-glued single plates and maintaining a long-time pressure maintaining state; the locking motor is provided with a locking force sensing system, a locking sleeve installed on a rotating shaft of the locking motor is matched with a bolt pull rod, and the wood structure is glued and locked, so that the locking force reaches the elastic yield stress interval capable of being borne by the wood structure material. The other end of the bolt pull rod is matched with the thrust ball bearing, the thrust ball bearing interacts with the high-toughness cushion block installed on the pressing base, the wood structure gluing process can be kept within the elastic yield stress range all the time, wood cannot be subjected to plastic deformation, and therefore the internal strength of the wood structure and the uniformity of the internal strength are guaranteed. Gluing pressure maintaining is carried out according to elastic yield stress of different woods based on different wood characteristics, manual intervention of a wood structure gluing process is avoided, and the quality stability of a glued wood structure can be greatly improved.

The invention discloses an angle-adaptive and pressure-adjustable optical element polishing grinding head, and belongs to the technical field of precision manufacturing, the angle-adaptive and pressure-adjustable optical element polishing grinding head comprises a bottom plate, a positioning mounting pin is arranged in the center of the upper surface of the bottom plate, an air nozzle is mounted on the upper surface of the bottom plate, and a corrugated pipe connector is arranged on the lower surface of the bottom plate; the corrugated pipe connector is connected with the top end of a corrugated pipe, a grinding head base is installed at the bottom end of the corrugated pipe, and a grinding head is connected to the lower portion of the grinding head base through a clamping ring. According to the angle-adaptive and pressure-adjustable optical element polishing grinding head, the angle of the grinding head is automatically adjusted through the flexible structure of the corrugated pipe, the grinding head is dynamically attached to the surface of an optical element, and the grinding head adapts to the surface with the complex curvature; the contact pressure between the grinding head and the surface is accurately controlled by regulating and controlling the medium pressure in the corrugated pipe, and excessive grinding or damage is avoided. The closed cavity guarantees the stability of the system, and the dynamic adjusting capability guarantees the real-time optimization of the angle and the pressure in the machining process.

The invention discloses a tube drawing and forming device for quartz tube production, and relates to the technical field of glass tube drawing and forming, the tube drawing and forming device comprises a plastic melting and blow molding structure, the side end of the plastic melting and blow molding structure is provided with a temperature adjusting slotting structure in a communicating mode, and under the cooperation of a forming guide assembly and a stretching control assembly, when the stretching control assembly is used for stretching a quartz tube, the temperature adjusting slotting structure is opened; when a formed quartz tube is too large to cause follow-up deviation, the forming guide assembly is adjusted, aligned guide is formed by the forming guide assembly and the stretching control assembly, and then uniform-speed stretching is performed, so that under the cooperation of an open groove in the inner wall of an adjusting high-temperature-resistant rotating ring, a bottom plate, a return damping spring and a guide edge, the quartz tube can be quickly and stably formed. The guide edge is arranged on the periphery of the quartz tube to reinforce the heat stress groove formed in the periphery of the quartz tube, and meanwhile, the guide edge is in sliding connection with the heat stress groove formed in the periphery of the quartz tube in the forming process, so that intelligent positioning and stretching in the quartz tube stretching process are achieved, and the stability and shape precision of the quartz tube in the forming process are improved.

The utility model discloses a novel barrel surfacing anti-deformation tool which comprises symmetrically-arranged bases, a sliding supporting piece is arranged between the two bases, symmetrically-arranged clamping assemblies are connected to the upper portion of the sliding supporting piece in a sliding mode, barrels are clamped in the clamping assemblies respectively, a lifting adjusting assembly is fixed to the upper end of the base on the right side, and the lifting adjusting assembly is fixed to the lower end of the base on the right side. The welding assembly is arranged at the upper end of the lifting adjusting assembly, a gear motor fixedly connected with the base is arranged on the right side of the lifting adjusting assembly, the clamping assembly comprises a connecting ring and a gear ring which are coaxially arranged, a plurality of fixing blocks are fixed between the connecting ring and the gear ring along the circumference of the connecting ring and the gear ring, and clamping telescopic rods are fixed in the fixing blocks correspondingly. The barrel bodies are fixed through the two clamping assemblies, meanwhile, the two clamping assemblies are pulled to be close to each other through the pressure applying telescopic rod, so that the end faces of the two barrel bodies are in contact and abut against each other, and when surfacing welding is conducted on the connecting position of the two barrel bodies, the pressure applying telescopic rod is still fixed, so that pressure on the end faces of the two barrel bodies is balanced, and the barrel bodies are prevented from deforming.

The invention discloses a prestressed pipeline cleaning method and device.The method comprises the steps that S100, the device is placed into a to-be-cleaned pipeline, and a base is adjusted to stretch automatically till supporting wheels and driving wheels are attached to the inner wall of the pipeline; s200, the telescopic rod extends till the cleaning brush is attached to the pipeline; s300, a telescopic rod is driven to rotate, and a dust collection unit is started to provide negative pressure for a dust collection bin; s400, the adjusting base is rotated, so that an angle is formed between the supporting wheel and the driving wheel and the advancing direction of the device, and the driving unit drives the driving wheel to rotate to drive the rotating wheel to advance; s500, the telescopic rod continuously rotates, so that the cleaning brush continuously rubs with the inner wall of the pipeline, sundries on the cleaning brush are swept, and the swept sundries are sucked into a dust collection bin by a dust collection head; and S600, when all impurities in the pipeline are cleaned, or the electric quantity of the device is about to be exhausted, the telescopic rod is shrunk, the dust collection unit is closed, and the driving wheel rotates reversely to exit from the pipeline. The cleaning efficiency is improved, the adaptability to different pipe diameters is guaranteed, and the cleaning effect is optimized.

The invention relates to a high-precision and fast-response ultrahigh pressure adjusting method based on a real-time feedback control principle, and belongs to the technical field of ceramic manufacturing. The high-precision and fast-response ultrahigh pressure adjusting method based on the real-time feedback control principle comprises the steps that after a pressure adjusting device is started, a target pressure value is set; a high-precision pressure sensor is used for monitoring the pressure value in the forming process in real time; acquiring data of the pressure sensor in real time through a data acquisition system, and performing filtering and correction processing; the controller calculates the deviation between the current pressure and the set pressure according to the set pressure value and the pressure value collected in real time; by means of the real-time feedback control technology, high-precision adjustment of pressure is achieved, it is ensured that ceramic powder is subjected to uniform pressure in all directions, particles are tightly arranged, the forming density is improved, meanwhile, due to the fact that the pressure is applied in the same direction, the powder particles are subjected to the same compression force in all directions, and it is ensured that ceramic blanks are uniform in density and regular in shape.

The invention relates to the technical field of industrial sludge treatment, in particular to a liquid-containing material filter pressing device, which is characterized in that a conveying unit is used for conveying filter cloth and a liquid material between the filter cloth to a filter press; the feeding unit is matched with the conveying unit and is used for conveying a liquid material between the upper-layer filter cloth and the lower-layer filter cloth; the cloth folding unit comprises an upper cloth assembly and a lower cloth assembly, and the upper cloth assembly and the lower cloth assembly are used for supplying and conveying upper-layer filter cloth and lower-layer filter cloth respectively; the filter press is arranged at the tail end of the conveying unit and is used for applying extrusion force to the liquid material coated between the upper-layer filter cloth and the lower-layer filter part so as to carry out solid-liquid separation; the filter cloth cleaning unit is used for cleaning the recycled upper-layer filter cloth and lower-layer filter cloth; the control unit is electrically connected with the units and used for controlling the running state and working parameters of the equipment, the conveying and stacking mechanism of the filter cloth is optimized, it is guaranteed that the filter cloth is not prone to dislocation in the stacking process, and the solid-liquid separation process is more thorough.

The invention discloses a pipe lifting device, and relates to the field of lifting slings, the pipe lifting device comprises a fixing plate, a second stepping motor is arranged in the center of the fixing plate, a cantilever beam plate is arranged in the middle height position of a vertical rod, and a first stepping motor is arranged at the top end of the cantilever beam plate; an output shaft of the first stepping motor and an output shaft of the second stepping motor coincide with the axis of the fixing plate in the vertical direction, and an assembling mechanism is arranged at the top end of the vertical rod. According to the lifting appliance, the lifting appliance is suspended and erected at the top end of the pipe through a locomotive suspension arm, the lifting appliance slowly falls down from the end opening of the top end of the pipe, the outer arc-shaped tiles are located on the outer side of the pipe opening, the inner arc-shaped tiles are located on the inner side of the pipe opening, and the three sets of inner arc-shaped tiles and outer arc-shaped tiles can be attached to the side walls of the pipe opening correspondingly; if an existing clamp clamps a pipeline with too large force, the side wall of the pipe can be extruded into an oval shape, and contour deformation cannot be caused when the clamp clamps the pipe wall.

The invention relates to the technical field of solar photovoltaic equipment manufacturing, in particular to a film feeding device of an EVA film cutting machine. A film feeding device of an EVA film cutting machine comprises a support, a driving roller, a pressing roller, a first adjusting mechanism and a second adjusting mechanism. The driving roller is horizontally arranged on the support, and the driving roller is arranged to be capable of rotating around the axis of the driving roller under driving of the driving mechanism and used for conveying the EVA film. The pressing roller is horizontally arranged above the driving roller and can rotate around the axis of the driving roller. The first adjusting mechanisms are arranged at the two ends of the pressing roller and used for adjusting the height of the pressing roller from the two ends of the pressing roller. The second adjusting mechanism is arranged above the pressing roller and used for applying downward pressure to the middle of the pressing roller. Through the arrangement mode, the pressing roller is in close contact with the upper surface of the EVA film all the time. By means of the design, it is ensured that the EVA film is kept flat in the unfolding process, and the wrinkling or unevenness phenomenon caused by a gap between the pressing roller and the EVA film is avoided.

The invention relates to the technical field of sandwich composite materials, and discloses a web-reinforced sandwich composite structure prepared by using a thermal expansion compression molding process and a method of the web-reinforced sandwich composite structure. Firstly, a light core (hard foam, balsa wood, honeycombs and the like) is cut into a required shape, an expandable foam prepreg film is cut according to a designed web structure, the interior and exterior of the web structure and the outer contour of the whole product are coated with expandable foam glue, then composite prepreg is laid on the product according to design requirements, and the composite prepreg is formed. And the web plate reinforced sandwich composite material structure is formed by utilizing internal expansion force generated by limited foaming in a thermal expansion foam pre-impregnated glue film mold. The maximum expansion force of the thermal expansion compression molding process can be maintained after the epoxy resin gel point, so that the performance of the web reinforced sandwich composite material is fully ensured, and the structural performance of the prepared web is enhanced.

The invention relates to the technical field of powder metallurgy, in particular to an automobile gear powder metallurgy forming device and a gear manufactured through the automobile gear powder metallurgy forming device, and the automobile gear powder metallurgy forming device comprises a base, a mold mechanism used for shaping powder, a bearing mechanism used for bearing the powder and a shifting mechanism used for adjusting the position of the mold mechanism. According to the device, the mold cavity is formed through the mold mechanism, the bearing mechanism is matched with the stirring mechanism, the mold mechanism is disassembled into the multiple thin cavities with the same thickness, the multiple thin cavities are filled with the metal powder through the powder feeding mechanism, and the powder in the multiple thin cavities is sequentially pressed through the pressing mechanism; the powder at the top and the bottom in the thin cavities is stressed more uniformly, the compactness of the powder is controlled by controlling the pressing distance of the pressing mechanism, then the stirring mechanism is matched with the bearing mechanism to combine the thin cavities into a thick cavity, and then the powder in the thick cavity is pressed to form a green body. And therefore, the powder is stressed more uniformly.

The utility model discloses a fixing device for processing a high-toughness communication optical cable, which comprises a supporting mechanism and a fixing mechanism arranged at the top of the supporting mechanism, the supporting mechanism comprises a top frame, the fixing mechanism comprises a mounting seat, and the center of the top of the mounting seat is in sliding connection with a limiting rod. The equipment has the advantages of stable clamping and convenient adjustment, and solves the problems that the fixing effect of part of fixing devices on optical cables is not ideal, adjustment cannot be carried out according to optical cables of different specifications, the optical cables which cannot be effectively fixed are prone to displacement or looseness under external environment changes (such as temperature, wind load and vibration), and the optical cables cannot be effectively fixed. In the prior art, faults such as micro-bending loss increase and connection point loosening may be generated, the overall reliability and the service life of an optical cable line are reduced, the whole fixing device may need to be replaced when optical cables of different sizes are replaced or maintained by a fixing device lacking of adjustability, and the engineering cost and complexity are increased.

The invention relates to the technical field of composite material bonding, in particular to a large-thickness composite material multi-layer bonding tool and process, the large-thickness composite material multi-layer bonding tool is used for assisting bonding of composite material plates, the bonding tool comprises an upper pressing plate and a lower bottom plate which are arranged in parallel, the upper pressing plate and the lower bottom plate are connected through a stand column, and the upper pressing plate is connected with a hydraulic device and used for applying pressure; a first heating plate is arranged on the face, away from the hydraulic device, of the upper pressing plate, and a second heating plate is arranged on the face, away from the hydraulic device, of the lower bottom plate. According to the large-thickness composite material multi-layer bonding tool and process, the bonding face with the uniform roughness is manufactured through treatment of the demolding cloth, the thickness of the adhesive layer is controlled through the glass beads, the upper pressing plate and the lower pressing plate of the tool are provided with the heating plates, the bonding face is rapidly heated and cured, the heating time of a large-thickness product is shortened, and the production efficiency is improved. The problems that the composite material in the middle of the structure is heated unevenly and the curing degree is insufficient are solved, and large-thickness composite material products can be rapidly and effectively manufactured.

The utility model relates to the field of energy accumulators, in particular to a bag type energy accumulator with a flow dividing piece, which comprises a shell, an inflation valve is arranged at the top of the shell, a bag is arranged in the shell, the inflation valve is connected and communicated with the top of the bag, a hydraulic oil valve body seat is arranged at the other end, far away from the inflation valve, of the shell, and the hydraulic oil valve body seat comprises a valve body arranged inside. According to the hydraulic oil valve, the flow dividing piece is arranged on the hydraulic oil valve body seat, pressure oil input into the shell can be effectively divided, most of the oil can penetrate through the flow dividing piece, and the flow dividing piece is fixed to the upper portion of the seat body, located in the shell, of the hydraulic oil valve body seat. The oil enters each first flow dividing channel, each second flow dividing channel and each third flow dividing channel and then is output from the channel of the upper half portion in a flow dividing mode, so that the output direction of the original oil is wider after flow dividing, and the pressure of the pressure oil received by the capsule is more uniform.

The invention discloses a keyboard capable of improving balance, which comprises a keyboard bottom shell, a keyboard shaft body positioning steel plate and a keyboard key shaft body, and is characterized in that in the use process, a balance guide arc block is mounted in a small keycap; the arc-shaped smooth surface of the balance guide arc block can be in contact with the surface of the arc-shaped guide groove when the small keycap is subjected to lateral inclined pressure, so that the vertical pressing state of the small keycap is kept, and a large-size space keycap is supported and mounted by arranging a plurality of groups of keyboard key shaft bodies. And meanwhile, more groups of inclined mounting plates and balance guide arc blocks are arranged at the bottom of the space keycap, sliding guide wheels are mounted in the balance guide arc blocks, and when the sliding guide wheels are subjected to lateral abnormal pressing, the sliding guide wheels are attached to the surfaces of the arc guide grooves, so that the fracture risk of the pressing shaft rod can be further reduced.

The invention discloses an airflow stirring device with a high-temperature sealing effect and a using method thereof. The airflow stirring device comprises a stirring container, a gas distributor arranged at the bottom of the stirring container, a driving stirring mechanism arranged on the stirring container and the gas distributor, and a multi-stage sealing assembly arranged on the gas distributor and the driving stirring assembly. The stirrer is matched with the gas distributor for use, the dispersion capacity is high, the circulation capacity is good, the problems of high-temperature caking and poor suspension effect of mixed materials are solved, the multi-stage sealing assembly is adopted, the sealing performance is enhanced, and the danger of explosion caused by sealing failure and gas leakage at the high temperature is prevented; the sealing reliability of the stirring device under severe working conditions such as high temperature is greatly improved, the possibility of explosion caused by gas leakage is reduced, the multi-stage cooling assembly is adopted, the temperature of a sealing part is reduced, downward heat transfer is reduced, and it is guaranteed that the device operates stably at the high temperature.

The utility model discloses a press fitting device which comprises a bottom plate, a backup plate, a movable plate, a transverse pressurizing assembly and a pressing plate assembly. The backup plate and the movable plate are vertically mounted on the bottom plate, an accommodating space for stacking iron core related accessories therein is formed between the backup plate and the movable plate, the backup plate is fixed on the bottom plate, and the movable plate can transversely move relative to the bottom plate; the transverse pressurizing assembly is located on the outer side of the backup plate and the movable plate and used for transversely pressurizing iron core related accessories. The pressing plate assembly is located above the containing space and used for vertically pressurizing the iron core related accessories. According to the press-fitting device, through the arrangement of the transverse pressurization assembly and the pressing plate assembly, uniform pressurization on the linear punching sheets can be achieved, uniform inter-sheet pressure is generated, the good press-fitting effect is achieved, and the press-fitting device is simple in structure, ingenious in design, low in cost, convenient to install and capable of being widely applied to most press-fitting operation.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The present invention provides a brake spring positioning structure of a parking brake air chamber, comprising a middle air chamber assembly, a membrane, an upper shell, a spring seat, a brake spring and a positioning sleeve, wherein the membrane is crimped between the upper shell and the middle air chamber assembly and forms a parking cavity with the middle air chamber assembly, and is characterized in that the spring seat, the brake spring and the positioning sleeve are concentrically assembled in the cavity formed by the membrane and the upper shell, the inner center of the upper shell has an inwardly recessed annular cone, the sleeve body of the positioning sleeve matches the annular cone, and the positioning sleeve has a first positioning portion, a second positioning portion and a third positioning portion, and the inner hole of the lower port of the brake spring is positioned and matched through the first positioning portion, the second positioning portion and the third positioning portion, the base portion of the spring seat is disc-shaped and abuts against the membrane, and the main body portion thereof has a plurality of evenly distributed variable diameter structures, and the inner hole of the upper port of the brake spring is positioned and matched through the variable diameter structures.

The invention relates to the field of anode conversion film voltage withstanding performance testing, in particular to an anode conversion film voltage withstanding performance testing device and method. Comprising a temperature control box, a pressurizing mechanism and an optical microscope, a pressure measuring platform is further arranged in the temperature control box, the pressurizing mechanism comprises a pressing disc and a pressurizing driving assembly, and the pressurizing mechanism further comprises a rubber pressing sleeve fixedly arranged on the pressing disc in a sleeving mode and an expanding assembly capable of expanding the rubber pressing sleeve. And a pressure maintaining structure for avoiding insufficient contact between the rubber pressing sleeve and the sample is arranged in the rubber pressing sleeve. The rubber pressing sleeve is driven by the expansion assembly to deform, so that the rubber pressing sleeve is synchronously expanded in multiple directions to ensure that the whole sample is uniformly pressed, and meanwhile, the pressure maintaining structure is started, so that the condition that the rubber pressing sleeve and the sample are insufficiently contacted is avoided, and the pressure uniformity is further improved.

The utility model provides a motor bearing press-fitting device which comprises a supporting table, a guide column, a supporting plate, a press-fitting structure, a supporting frame, a press-fitting hydraulic structure and a bearing positioning structure, the guide column is fixedly installed on the surface of the supporting table, the supporting plate is fixedly installed on the top of the guide column, and the press-fitting structure is installed on the surface of the guide column in a sliding mode; the supporting frame is fixedly installed on the surface of the supporting table, and the press-fitting hydraulic structure is fixedly installed on the top of the supporting frame and fixedly connected with the press-fitting structure. The bearing positioning structure is fixedly mounted on the surface of the supporting table; due to the arrangement of the press-fitting structure and the bearing positioning structure, the problems that an existing bearing press-fitting structure is still incapable of accurately positioning, uneven in pressure distribution and relatively low in production efficiency are solved.

The present invention discloses a horizontal axis eccentric hemispherical valve, which adopts a horizontal axis structure to install the valve core, and the axis of the valve stem is perpendicular to the flow direction of the medium in the valve body and is arranged horizontally, so as not to occupy the lower end of the flow channel, so that the lower end of the flow channel can be designed to be flatter than that of a vertical eccentric hemispherical valve, thereby reducing the flow resistance. The valve core is provided with a cylindrical boss concentric with the valve core, and a sealing ring is provided in the gap on the boss, the sealing ring has a spherical crown-shaped sealing surface, and an air bag ring is provided in the gap formed by the boss and the sealing ring. The sealing ring and the valve core are fixed by a fixing assembly, so that the valve core sealing spherical crown and the valve seat center can be adjusted to be concentric during assembly, so as to overcome the processing error and ensure effective sealing.

The invention discloses a multi-cavity balloon blood vessel dilation catheter which comprises a catheter body. The multi-cavity balloon is arranged on the catheter in a sleeving manner; wherein the multi-cavity balloon comprises a balloon body, the balloon body comprises at least two cavities, the appearance of the multi-cavity balloon body is in a concave-convex shape, and all cavity channels of the balloon body are communicated with cavity channels filled with a pressure relief medium; each cavity of the balloon is filled, and the pressure of the pressure relief medium is balanced; on the circumference of the section of the blood vessel dilation section, the value of radial dilation supporting force borne by the balloon on the blood vessel wall is inconsistent, the radial dilation supporting force F borne by the balloon attached to the blood vessel is maximum, and the non-attached area of the balloon and the blood vessel is not subjected to the radial dilation supporting force. The blood vessel inner wall which is not subjected to radial expansion supporting force and the blood vessel inner wall which is subjected to the maximum radial expansion supporting force are easy to tear or crack, so that the purpose of blood vessel expansion is achieved, and the blood vessel expansion effect is effectively improved; and the balloon sunken part is used for blood to pass through when the multi-cavity balloon dilates a blood vessel.

The invention discloses a high-flow pressure and temperature measuring endoscope head end shell which is characterized in that an elliptical instrument channel mounting hole and a camera module mounting hole are formed in an end shell body, a snake bone mounting bracket is arranged at the near end of the end shell body, a sensor mounting hole is formed in the end shell body, and a sensor assembly is mounted in the sensor mounting hole; the radial sectional area of the instrument channel mounting hole is the same as that of the near end; compared with the prior art, large flow can be realized by arranging the instrument channel mounting hole for irrigation, and the pressure is more uniform; according to the size of the cross section of an instrument channel mounting hole, the long axis of the cross section is 1.8 mm, and the short axis of the cross section is 1.2 mm; compared with the prior art, the flow is larger, and the pressure is more uniform; the radial sectional area of the instrument channel mounting hole is the same as the radial sectional area of the near end; the fitting performance of the end shell body with the same radial sectional area of the far end and the near end of the instrument channel mounting hole is better.

The invention discloses a casting part strength detection device, and relates to the technical field of casting part detection, the casting part strength detection device comprises a rack and a detection box arranged on the rack, the side, away from the rack, of the detection box is slidably connected with an abutting rod, and the end, close to the rack, of the abutting rod is connected with a pressing plate through a pressure sensor; the detection box is provided with a cleaning assembly used for automatically cleaning the placing plate, the pressing plate is provided with a pressure applying assembly used for synchronously applying pressure to casting parts with complex surface shapes in a multi-point mode, the pressure applying assembly comprises mounting cavities formed in the pressing plate, and the mounting plates are connected with the mounting cavities through telescopic assemblies. And one side, close to the placing plate, of each mounting plate is fixedly connected with a pressure applying rod. According to the casting piece strength detection device disclosed by the invention, multi-point pressure is applied to the casting piece with a complicated surface shape, so that the loading force of the pressing plate on the casting piece can be uniformly distributed on a sample.

The invention provides a universal pressurizing device and sintering equipment applying the same. The pressurizing device comprises a mounting seat, a piston, a pressure head and a positioning pin. First inserting structures are arranged on the mounting base, and piston holes and positioning holes are formed in each row of first inserting structures in a staggered mode. The pistons are movably arranged in the corresponding piston holes. The second plug-in mounting structure on the pressure head is matched with the first plug-in mounting structure; the two sides of the pressing head are located through locating pins respectively. A novel pressure head layout mode is adopted, each pressure head can correspond to one or more pistons, the large-range flexible adjustment of the pressure applying area and the pressure value can be achieved, the universality of the device is improved, single-piece production of different products can be achieved, and small-batch production can also be achieved. And on the premise that the mounting base is not disassembled, the pressing head can be quickly replaced, and the operation convenience and the production efficiency are improved. And meanwhile, the pressure heads can be symmetrically distributed, the pressure is balanced, the product quality can be improved, and the service life of the device and equipment is prolonged.

The utility model discloses an edge pressing device for carton processing, and relates to the technical field of carton processing. The edge pressing device for carton processing comprises a workbench, an adjusting assembly and an auxiliary assembly, a movable plate is arranged at the top of the workbench, a carton body is arranged below the movable plate, the adjusting assembly is arranged on the movable plate, the auxiliary assembly is arranged on the movable plate, the auxiliary assembly comprises a fixed frame and a second motor, and the second motor is fixed to the bottom of the inner side of the fixed frame. An output shaft of the second motor penetrates through the fixing frame and is fixedly installed on the top of the box body. Through the arrangement of the auxiliary assembly, the positions of the pressing plates can be rotated, the relative positions and angles of the pressing plates can be adjusted by rotating the two sets of pressing plates so as to adapt to cartons of different shapes and sizes, it is ensured that all angles of the cartons are subjected to uniform edge pressing machining, the positions and angles of the pressing plates can be adjusted within a short time, the adjusting time is shortened, and the production efficiency is improved. And the production efficiency is improved, and meanwhile, the labor intensity of operators is also reduced.