39 results about "Air pressure effects" patented technology

The present application discloses a hoisting tool and a fixture thereof. The fixture comprises a support frame, a clamping mechanism, a pneumatically controlled self-locking mechanism, and a pneumatic valve assembly. The clamping mechanism is arranged on the support frame and is movably arranged relative to the support frame at least in a first direction, such that a clamping space of the clamping mechanism has an adjustable size in the first direction. The pneumatically controlled self-locking mechanism is connected to the clamping mechanism and can communicate with a gas source. Moreover, the pneumatically controlled self-locking mechanism is configured to, in response to an air pressure effect acting on the pneumatically controlled self-locking mechanism, drive the clamping mechanism to move in the first direction so as to adjust the size of the clamping space, and, after the air pressure effect is relieved, lock the clamping mechanism. The pneumatic valve assembly is configured to selectively conduct a gas path between the gas source and the pneumatically controlled self-locking mechanism such that air pressure acts on the pneumatically controlled self-locking mechanism, or block the gas path between the gas source and the pneumatically controlled self-locking mechanism so as to relieve the air pressure acting on the pneumatically controlled self-locking mechanism. According to the present application, the present state is maintained after the gas source is disconnected, thus reducing the risk of a battery falling off from the fixture, and improving the safety during battery hoisting.

The utility model discloses a waste gas sampling and collecting box for environmental protection, which relates to the technical field of waste gas sampling and collecting, and comprises a box body, the bottom end of the inner side of the box body is provided with a getter pump, the top of the getter pump is connected with a gas pipe, the other end of the gas pipe is provided with a gas suction head, and the top end of the gas suction head is in threaded connection with a filter screen cover; the middle of the outer wall of the air pipe is sleeved with a movable plate, and the inner side of the movable plate is movably connected with a baffle. According to the environment-friendly waste gas sampling device, the movable plate, the box body, the gas pipe, the gas suction pump and the like are arranged, the gas suction pump is started, waste gas needing to be sampled in an environment-friendly area is subjected to gas suction operation through the gas suction head, the waste gas enters the box body, and the movable plate can be pushed to move upwards along with continuous entering of the waste gas, so that the guide rod at the top end of the movable plate can move upwards; and people can visually know the volume of waste gas collected in the box body according to the scale marks arranged on the surface of the guide rod, and the box body is not prone to deformation or damage due to the influence of air pressure.

The invention relates to the technical field of gas tightness detection of furnace noses, in particular to a furnace nose gas tightness detection method and system applied to an aluminum-silicon plating process, and the method comprises the steps: obtaining the gas pressure, hydrogen content and oxygen content of a gas outlet of a furnace nose at each moment in each period, and the temperature of the interior of the furnace nose at each moment in each period; the external air pressure at each moment in each period in the air outside the furnace nose is measured; the relative air pressure difference of each period is determined; determining the air pressure deviation value of each period; determining a relative trend quantity of each period; determining an air pressure influence factor of each period; determining the hydrogen stability of each period; the gas fluctuation degree of each period is determined, the leakage coefficient of each period is determined, and the gas tightness of the furnace nose is detected. According to the invention, the air tightness condition of the furnace nose can be monitored in real time, the accuracy of detecting the air tightness of the furnace nose is improved, and the product quality and the production efficiency can be improved.

The utility model discloses a metering pump convenient to install for a dispensing machine, and relates to the technical field of metering pump installation. The dispensing machine comprises a dispensing machine rack, a mounting base, a bearing seat and a metering pump arranged at the front end of the bearing seat, and an inserting hole and a positioning hole are formed in the surface of the mounting base. The spring is stretched by pulling the piston rod, the bearing seat and the mounting base are connected in an inserted mode, the two ends of the L-shaped cavity correspond to the insertion hole and the positioning hole respectively, the piston rod is inserted into the L-shaped cavity under the elastic force action of the spring, air in the L-shaped cavity is extruded, and the air in the L-shaped cavity is compressed. The piston ring is pushed by air pressure to move so that the limiting pin shaft can be inserted into the inserting hole, the mounting base and the bearing base can be fixed through the piston rod and the limiting pin shaft, and the piston rod is pulled so that the piston ring can move in the L-shaped cavity under the air pressure effect so that the limiting pin shaft can be retracted. And therefore, the bearing seat can be conveniently disassembled.

The utility model provides a ground socket structure and a lamp, which belong to the technical field of lighting equipment, the ground socket structure comprises a mounting piece and a ground socket, one end of the mounting piece is connected to a lamp body, and the other end is provided with a mounting cavity along the axial direction of the mounting piece; the ground socket comprises a connecting piece matched with the mounting cavity and a plurality of plug connectors connected to the peripheral surface of the connecting piece, every two adjacent plug connectors are arranged at intervals, the connecting piece is inserted into the mounting cavity, and a connecting groove is formed in the insertion end of the connecting piece in the axial direction of the connecting piece; the connecting piece is further provided with an exhaust hole communicated with the connecting groove. The utility model provides a ground plug structure and a lamp, and aims to solve the problem that in the prior art, when a ground plug and a mounting piece are connected or separated, the air pressure effect needs to be overcome, and the labor amount is increased.

The utility model provides a sensor shell machining tool, a sensor shell comprises a large-diameter shell and a small-diameter shell which are fixedly connected, and a first through hole is formed in the middle of the small-diameter shell; the sensor shell machining tool comprises a mandrel, the mandrel comprises a large-diameter part and a medium-diameter part which are fixedly connected, and the shapes of the large-diameter part and the medium-diameter part are matched with the shapes of an inner cavity of a large-diameter shell and an inner cavity of a small-diameter shell respectively; a first air hole is formed in the end face, close to the medium-diameter part, of the large-diameter part, a second air hole is formed in the end face, away from the large-diameter part, of the medium-diameter part, and the first air hole and the second air hole both extend to the outer side of the end face, away from one end of the medium-diameter part, of the large-diameter part so as to be communicated with the atmosphere. When the scheme is used for positioning the sensor shell, the internal space of the sensor shell is communicated with the atmosphere through the first air hole and the second air hole, so that the situation that the sensor shell is difficult to take down due to the influence of air pressure after being sleeved with the mandrel can be avoided.

The present invention relates to a limiting and fixing device for a geocell, comprising a fixed plug rod, a cavity is formed inside the fixed plug rod, a fixing mechanism for preventing the fixed plug rod from being separated from the soil is provided at the bottom of the cavity, and an injection mechanism for improving soil stability is provided in the middle of the cavity; after the second piston moves to below a plurality of discharge holes, due to the influence of the air pressure in the area between the first piston and the second piston, the diluted soil solidifying agent is first sprayed out from the plurality of discharge holes to spray the soil around the fixed plug rod, and after the air pressure is reduced, the diluted soil solidifying agent flows out from the plurality of discharge holes, soaks the soil below the fixed plug rod along the outer wall of the fixed plug rod, and cooperates with an external soil compacting tool to compact the soil around the fixed plug rod, so as to avoid the situation where the soil is loose and the fixed plug rod is pulled out of the soil, thereby improving the stability of the fixed plug rod.

Provided is an analysis system, comprising: an analysis module adapted to detect and / or analyze a gas to be measured; a selection module adapted to select an operating mode of the analysis module; and a motive gas supply module disposed outside the analysis module. The motive gas supply module includes: a gas source adapted to provide motive gas for driving the movement of gas in the pipeline of the analysis system; and an exhaust gas purification and balancing device adapted to purify the exhaust gas from the analysis module into clean gas and use the clean gas to balance the air pressure between the analysis module and the external pipeline. The exhaust gas purification and balancing device is used to achieve the air pressure balance and isolation in the gas path of the analysis system, with little influence from the external air pressure, little impact on the ion mobility spectrometer and mass spectrometer in the analysis module due to the sample injection of the detected gas, and an increase in the amount of effective data.

The invention discloses a casting method for a front end cover of a helicopter engine. The casting method comprises the following steps: modeling the front end cover of the engine; designing a pouring system; determining a parting surface and designing a bottom mold, a cover mold, each detachable sand mold, a mold core and an oil path sand core; 3D printing is carried out on a bottom mold, a cover mold, a riser sand mold, each detachable sand mold, a mold core and an oil way sand core; the mold cores, the oil way sand cores and the detachable sand molds are loaded into the corresponding sand molds correspondingly; hoisting and stacking the bottom mold and the cover mold to form an integral sand mold; hoisting the combined integral sand mold into a sand box, carrying out sand filling molding, and hoisting the sand box above a sealing cover of a heat preservation furnace after the resin sand is cured; the upper port of the riser tube is in butt joint with the center sprue of the bottom mold; magnesium alloy liquid is smelted, low-pressure pouring is conducted, and under the air pressure effect, the magnesium alloy liquid is subjected to upward mold filling through a liquid rising pipe and a pressure adjusting sprue; and shakeout is performed after cooling and curing. The pouring requirements of thick and large parts and thin walls can be met at the same time, a slender oil way is internally integrated, sequential solidification is achieved, feeding is reliable, and the quality is high.

The invention relates to the technical field of pouring, in particular to a tool and method for pouring bus vibration, and the tool comprises a supporting unit which comprises a support and a supporting plate used for bearing a poured bus; the supporting plate is arranged on the supporting seat, the buffering connecting mechanism is connected between the supporting seat and the supporting plate, the height of the buffering connecting mechanism is adjustable, the vibration unit comprises a driving assembly for driving the supporting plate to vibrate up and down, and during use, a transfer trolley is conveyed to the top of the supporting plate through a forklift, and then the supporting plate is driven to ascend through an inflation assembly, so that the supporting plate ascends to a proper height; the supporting plate is driven by the driving assembly to vibrate, under the cooperation effect of the auxiliary assembly, the supporting plate drives the circulation vehicle to move up and down, the circulation vehicle vibrates a pouring bus to eliminate bubbles, and under the air pressure effect of the buffering connecting mechanism, noise is greatly reduced.

The invention relates to the technical field of mixing devices, and discloses a water and fertilizer mixing device for landscaping, the water and fertilizer mixing device comprises a batching mechanism, a mixing device and a plurality of fertilizer storage cabins, the bottom end of each fertilizer storage cabin is communicated with the interior of the mixing device through a powder conveying device, and each fertilizer storage cabin is in a closed state; the mixing device comprises a sealed cavity, the top of the sealed cavity is an air pressure cavity area, the bottom of the sealed cavity is a water and fertilizer mixing area, and the fertilizer outlet end of the powder conveying device is located at the position, close to the top, of the air pressure cavity area; and the stirring mechanism is arranged at the central position in the sealed cavity. Through the structural characteristics of the powder conveying device, the air pressure cavity area and the water and fertilizer mixing area are separated in the sealing cavity through the air pressure effect, the powder outlet end is arranged at the top of the air pressure cavity area, the mixing proportion of water and fertilizer can be controlled in real time, dynamic mixing of the water and the fertilizer is achieved, and operation is convenient.

The application provides a variable stiffness method of a vine-like inflatable arm and a position control method thereof, and belongs to the technical field of soft robots. The inflatable arm realizes the tip eversion to be elongated to a desired length through the air pressure effect, the pressure difference in the annular variable stiffness air bag around the arm rod is adjusted to control the local stiffness of the inflatable arm, the wrinkle is generated at the position with the lowest stiffness in combination with a motor-rope device, and the steering control of the inflatable arm is realized; when the position control is performed, sequential control algorithm is adopted to sequentially perform closed loop control on each joint based on the end trajectory tracking task, and three kinds of criteria are established in the algorithm to help the end trajectory tracking task to be completed. The variable stiffness range of the vine-like inflatable mechanical arm is improved, a new manufacturing process is adopted, the level of tip movement is improved, and the sequential control algorithm can help the inflatable arm to realize precise multi-joint parallel collaborative control.

The invention discloses a full-automatic pipe cutting machine based on aluminum pipe machining and a pipe cutting method, and relates to the technical field of pipe cutting machines. The full-automatic pipe cutting machine based on aluminum pipe machining comprises distance adjusting dust collection pieces, each distance adjusting dust collection piece comprises a connecting cylinder, each connecting cylinder is formed by alternately connecting a plurality of flat plates and arc plates, the arc plates are connected with connecting pipes through threaded pipes, and dust collection openings are formed in the middles of the outer sides of the connecting pipes; and the flat plate is in sliding connection with a plurality of inner wall suitable pressing pieces which are distributed at equal intervals, and the inner wall suitable pressing pieces are used for abutting against the non-cutting positions of the inner walls of the materials under the action of elastic force and are matched according to the cutting length. According to the full-automatic pipe cutting machine based on aluminum pipe machining and the pipe cutting method, the extending radius of the supporting plate and the pressure between the supporting plate and the inner wall of a material are changed through the air pressure effect, the possibility that the material deforms or burrs are generated in the cutting process is reduced, the distance adjusting dust suction part is matched with the inner wall adaptive pressing part, and chippings generated on the inner side of the material are absorbed in time.

The utility model relates to the technical field of sealing structures, in particular to a sealing end cover, a bearing box and a wire cutting machine, and aims to solve the problem that cutting powder generated in the process that a to-be-cut part is cut by the wire cutting machine is diffused to the bearing box, and the bearing lubricating environment is damaged. In order to achieve the purpose, the sealing end cover comprises an end cover body, and a center hole allowing a mounting body to penetrate through is formed in the end cover body in the axial direction; the end cover body is provided with a first end face and a second end face which are opposite to each other, an air inlet hole and a liquid inlet hole which are communicated to the center hole are formed in the end cover body, and the liquid inlet hole is located between the air inlet hole and the first end face. By the adoption of the bearing box, due to the air pressure effect, in the working process of the bearing box, the gap formed by the installation body and the end cover body is filled with liquid all the time, the path for cutting powder and other external impurities to enter the bearing box is blocked, and therefore the sealing effect is achieved, and a bearing in the bearing box is protected.

The utility model relates to the technical field of perfuming machines, and particularly discloses an atomizing nozzle mechanism and a perfuming machine applying the atomizing nozzle mechanism, an air outlet pipe is arranged, a mist outlet nozzle is sleeved in the air outlet pipe, one end of the mist outlet nozzle extends to an air outlet and protrudes outwards from the inside of the air outlet, and one end of the mist outlet nozzle protrudes outwards, so that the air outlet pipe is arranged in the air outlet pipe. In this way, the negative air pressure effect at the air outlet can be stronger, the oil accumulation problem can be reduced while the fragrance diffusion effect is improved, the multiple air guide strips are arranged on the inner wall of the air outlet pipe, air blown out of the air outlet pipe can be directionally guided, and therefore the situation that air in the air outlet pipe is disordered and collided to generate air noise is avoided; and atomized essential oil particles sprayed from the mist outlet nozzle can be directionally diffused, so that the problems of oil dripping and oil accumulation are further reduced.

The utility model discloses a chemical reaction kettle automatic adjusting device based on a pressure and temperature sensor, which comprises a kettle body, one end of the kettle body is connected with a feeding pipe, one end of the kettle body is provided with a first adjusting assembly and a second adjusting assembly, one end of the second adjusting assembly is communicated with the kettle body, one side of the kettle body is provided with a control panel, and the control panel is connected with the feeding pipe. By arranging the first adjusting assembly, the temperatures of multiple positions of the kettle body can be adjusted in the use process of the kettle body, so that the temperature adjusting effect and the adjusting efficiency of the kettle body can be ensured, meanwhile, bubbles generated by chemical materials can be eliminated when the chemical materials are mixed by the kettle body, and the chemical materials can be uniformly mixed. By arranging the first adjusting assembly, the reaction effect and efficiency of the chemical material can be further guaranteed, and by arranging the second adjusting assembly, the output and input air pressure can be adjusted and controlled, so that the situation that the reaction effect of the chemical material is affected by input and output air pressure is avoided.

The utility model belongs to the technical field of automobile parts, especially relates to a check valve, including valve body, the valve body, sealing plate and the pressing plate are connected through the connecting assembly, and the connection is fastened, and the anti-loose effect is superior, and the gap is left between the upper portion of pressing plate and sealing plate, is provided with one -way air inlet subassembly between the air inlet end and the air outlet end of valve body, when the air inlet end pressure of valve body is too high, the air pressure effect pushes open one -way air inlet subassembly and enters the air outlet end, when the air outlet end pressure is too high, the air pressure effect pushes open sealing plate, gas flows out, and after pressure balance, sealing plate is automatically closed, double one -way air outlet, also can guarantee gas flow direction correct after the situation that sealing plate is used too long and cannot be closed or breaks, avoids the trouble of equipment caused by backflow, backflow.

The application discloses a visible atomizer structure without liquid leakage, and relates to the technical field of electronic cigarette atomizer structures, which comprises an oil tank, an atomization mechanism, an atomization channel and a separation sheet, wherein the atomization mechanism comprises an oil storage medium, an oil guide atomization medium and an atomization device, the oil storage medium wraps the oil guide atomization medium, the oil guide atomization medium wraps the atomization device, and one side of the oil guide atomization medium extends into the oil tank. According to the visible atomizer structure without liquid leakage, the area corresponding to the oil tank of the shell is made of transparent material, and the liquid level line can be observed. The oil storage medium can temporarily store atomized liquid, avoids direct contact between the atomized liquid and the atomization device, and reduces liquid leakage. The atomization effect of the atomization device is prevented from being affected by the air pressure in the oil tank or liquid leakage occurs. The oil guide atomization medium directly contacts the atomized liquid, and when the liquid level of the atomized liquid is low, the atomization amount of the oil liquid at the atomization device can be maintained at a stable level, the smoking effect is ensured, and burning is effectively avoided.

The invention relates to the technical field of printing equipment, and discloses an elastic floating clamping self-locking mechanism which comprises a machine body, and two opposite inner plates are installed on the inner side of the machine body. Through linkage of the air pump and the capsule ring, real-time increase and decrease of pressure in the hot pressing process are achieved, and the problem that interlayer bubble retention or insufficient binding force is caused by traditional fixed pressure is solved. The first floating device and the second floating device are in linkage with the capsule ring, when the air pressure in the capsule ring is large, the downward pushing force of the first floating device and the second floating device is large, when the air pressure of the capsule ring is gradually reduced, the downward pushing force of the first floating device and the second floating device is gradually reduced, and dynamic pressure self-adaptive adjustment is achieved. And when materials with different thicknesses are encountered, the air pressure control bag ring, the first floating device and the second floating device have the buffering effect, the materials are prevented from being damaged, the elastic floating clamping effect is achieved, and self-locking for extruding the materials is formed under the air pressure effect.

The utility model discloses a clamp for metal tension test, which belongs to the technical field of metal tension test, and comprises a base, the upper surface of the base is fixedly connected with a first support rod, the upper surface of the first support rod is fixedly connected with a top plate, and a pulling mechanism is arranged below the top plate. A supporting plate and a clamping mechanism are arranged above the base; according to the device, the air pump, the first guide pipe, the second guide pipe, the protective shell, the piston and the clamping mechanism are arranged, the air pump conveys air into the protective shell through the first guide pipe and the second guide pipe, the piston is pushed through the air pressure effect in the protective shell, and the piston further pushes the two wedge blocks to be close to each other under the limiting effect of the hole groove; and the air pump driving system is adopted, so that the force can be quickly and efficiently applied and released, the operation efficiency is improved, and the testing time is saved.

The utility model discloses combined water purification treatment equipment, which relates to the technical field of water treatment and comprises a mounting structure, a cover body structure, a sealing structure, a connecting structure and a filtering structure. The mounting structure is convenient for mounting and dismounting of the filter element through the design of a limiting rod and a clamping block. The cover body structure is in sealed butt joint with the installation structure through threaded connection, and meanwhile a butt joint opening used for being in butt joint with a liquid inlet pipe is formed. The sealing structure is provided with the pressure tank and the filling air bag, and the sealing performance and connection stability are improved through the air pressure effect. A filter element in the filtering structure is used for filtering water, the equipment is simple in structure, good in sealing effect and convenient to mount and maintain, and the water quality treatment effect is improved.

The invention provides a carbon dioxide desorption device, method and system based on a calcium-based granular material. The device comprises an outer shell, an inner shell, an upper sealing plate, a lower sealing plate, a supporting plate and a plurality of falling pipes, a heating channel is formed between the outer shell and the inner shell, and the supporting plates are tightly attached under the preset mechanical effect to seal the material receiving cavity and are far away from the lower tail end of the inner shell under the air pressure effect to open the material receiving cavity so as to communicate with the heating channel, so that the calcium-based particle materials in the material receiving cavity flow into the heating channel under the driving of carbon dioxide; and the heating channel realizes desorption of carbon dioxide from the calcium-based particle material. A complete material circulation system is constructed, ordered flowing of the materials is guided, continuity of the desorption process is ensured, proceeding of the desorption reaction can be accurately controlled and ensured, the desorption rate of carbon dioxide from the calcium-based particle materials is greatly increased, stability and high efficiency of the desorption effect are ensured, and the method is suitable for large-scale popularization and application. The overall desorption efficiency is greatly improved.

The utility model relates to the technical field of acrylic protective film adhesive tapes, and discloses an acrylic protective film adhesive tape with a multi-layer adhesion structure, which comprises a base, a reinforcing rib is fixedly connected inside the base, a waterproof sheet is fixedly connected to the top end of the base, a plurality of water guide grooves are formed in the top end of the waterproof sheet, and the water guide grooves are communicated with the reinforcing rib. The top end of the waterproof piece is fixedly connected with a breathable film, a breathable assembly used for air exchange is arranged in the breathable film, the top end of the breathable film is fixedly connected with a protective film, the bottom end of the base is fixedly connected with an adhesion layer, and the front side and the rear side of the protective film are each fixedly connected with a convenient-to-tear tape. A plurality of honeycomb holes are formed in the breathable film. According to the utility model, moisture on the surface of the adhesive tape can be quickly removed, and the moisture is prevented from staying between the adhesive tape and the sticking surface for a long time, so that the problem that the adhesive tape is edged or falls off due to the action of air pressure is reduced.

The utility model discloses a nucleic acid extraction and amplification detection kit which comprises a shell, a reaction tank is fixedly connected to the inner wall of the shell, a top cover is arranged at the top of the shell, a fixed pipe is fixedly connected to the bottom of the top cover, and a sealing cover for sealing the reaction tank is fixedly connected to the bottom of the fixed pipe; the top of the top cover is fixedly connected with a motor, one end of an output shaft of the motor is fixedly connected with a driving shaft, and the driving shaft rotationally penetrates through the sealing cover. According to the reaction tank disclosed by the utility model, a solution can be mixed through the stirring blades and is matched with the fixed cylinder, so that the solution can circularly flow, the heating or annealing uniformity is further improved, the test effect is further improved, the temperature detection accuracy is also improved, and the temperature can be accurately detected in the heating and cooling processes of the reaction tank. Air can enter the reaction tank, so that the reaction tank is prevented from being damaged due to the influence of air pressure, the use safety is improved, the interior of the reaction tank is conveniently cleaned, and people can conveniently use the reaction tank.

The utility model discloses a swing head with a brake, which relates to the technical field of machining, and is characterized in that a brake air inlet and a brake releasing air inlet are arranged on a shaft body shell, and an optimized brake mechanism is arranged, so that accurate locking and rotation control of the position of the swing head are realized; the brake mechanism comprises a piston brake disc, a brake pad, a sealing ring, a spring and other components, the brake and unlocking functions are achieved through the air pressure effect, meanwhile, good air tightness and response speed are guaranteed, the device is further provided with a tail end cover and a framework oil seal, the daily dustproof effect is provided, and the stability and durability of equipment are further improved.

The utility model discloses a kind of sealing structure of air cleaner, including cylinder, cylinder cover, the top of the cylinder is provided with annular groove, detachable fixedly connected with assembly seat in the inside of annular groove, the top and bottom of the assembly seat are fixedly embedded with sealing elastic rubber membrane, the top of the assembly seat is fixedly interconnected with connecting pipe;The top of the assembly seat is equipped with filter core by limiting frame;Multiple snap components are jointly installed between the cylinder cover and the cylinder.The utility model in, adopt inflatable dynamic sealing structure, sealing elastic rubber membrane is inflated and deformed by air pressure effect, respectively, and filter core installation ring and annular groove inner wall are pressed tightly, form double seal, significantly improve the sealing reliability;While setting air pressure detection component real-time monitoring sealing cavity pressure, can find leakage anomaly and alarm in time, greatly improve the protection level and system operation safety of engine.

The invention provides an intraocular lens forming mold convenient to demold, and relates to the field of intraocular lens, the intraocular lens forming mold comprises an upper mold and a lower mold, the upper mold and the lower mold are both provided with a lens forming cavity, an air pressure chamber is formed in the lower mold, and an ejection groove is vertically formed between the air pressure chamber and the lens forming cavity; the top of the ejection groove is communicated with the crystal forming cavity, the bottom of the ejection groove is communicated with the air pressure chamber, a piston in the ejection groove is matched with an ejector pin assembly capable of moving up and down, one side of the air pressure chamber is fixedly connected with an air adding pipe, and the other end of the air adding pipe is connected with an air pump. According to the intraocular lens forming mold convenient to demold, through the arrangement of the ejection groove and the ejector pin assembly, during use, the air pressure chamber is inflated through the air adding pipe, the ejector pin assembly ascends under the air pressure effect to eject a workpiece out of the forming cavity, and therefore demolding is convenient, use is convenient, and the production efficiency is effectively improved.

The utility model discloses a surface treatment device for rubber pad production, which comprises a main body unit comprising an operation table fixedly connected with a top frame; the operation unit comprises a leakage plate, a groove is formed in the operation table, a plurality of rectangular boxes are symmetrically connected to the bottom face of the leakage plate in a sliding mode, connecting hoses are fixedly connected between the rectangular boxes, an extending hose is fixedly connected to the rectangular box on the front side, and an electric telescopic rod is arranged on the inner side of the top frame. An electric grinding disc is installed at the bottom end of the electric telescopic rod, and a moving assembly is arranged on the top frame. The connecting sleeve is connected with an external vacuum pump pipeline, then the lead screw is rotated, the rectangular box is driven to move and adjust, then the rubber pad is placed on the bushing, the vacuum pump is started, the bottom face of the rubber pad is adsorbed, the rubber pad is fixed through the air pressure effect, operation is easy and convenient, and practicability is high. And the rubber pad can be thoroughly polished, and the working efficiency is improved.

The efficient table top range hood comprises a machine shell and a filtering device used for filtering oil smoke, a smoke suction channel is formed in the machine shell, a suction port and an exhaust port which are communicated with the smoke suction channel are formed in the front end and the rear end of the machine shell respectively, and a side air outlet channel is formed in the position, corresponding to the rear portion of the suction port, of the periphery of the machine shell. The side air outlet channel and the smoke suction channel are mutually independent, a side air outlet is formed in the side air outlet channel, airflow blown out by the side air outlet forms an air wall, the side air outlet channel is further provided with an air inlet, and the air inlet is used for being connected with a positive pressure air source. According to the ventilation wall formed by the ventilation wall forming device, airflow power is independently provided by the air supply fan, the coverage range and the air pressure effect of the ventilation wall are ensured, and therefore escape of oil smoke in the distance is reduced, and more oil smoke is further treated after entering the air suction channel.