61results about How to "Air pressure adjustment" patented technology

The invention provides a high-pressure absorber with double cylinders provided with a floating piston assembly. The high-pressure absorber comprises an inner working cylinder, a piston assembly arranged in the inner working cylinder, damping oil, inert gas and a piston rod on a piston, wherein the upper part of the inner working cylinder is provided with a guider; the upper end of the guider is provided with a sealing dustproof cover and a sealing ring; an outer working cylinder is arranged outside the inner working cylinder; the floating piston assembly is arranged in a cavity of the outer working cylinder; a compression valve assembly is arranged in a bottom area, which is matched with inner walls of the outer working cylinder, of the inner working cylinder; an oil through valve is arranged inside the compression valve assembly; the valve is opened through damping force so that an oil way between the inner working cylinder and the outer working cylinder is unblocked; the inert gas is filled in an upper area, in which the floating piston assembly is arranged, of the outer working cylinder; and the damping oil is filled in other areas between the inner working cylinder and the outer working cylinder. The floating piston assembly is arranged in the cavity of the outer working cylinder, and an oil storage area of the damping oil is enlarged, so that the travel of the piston is maximized; connecting rods of various specifications can be applied to the absorber; and the absorber is wide in application and is an ideal absorber.

The invention provides an element installing device, which has a suction nozzle seat (51) embedded into a through hole of a cylindrical part (52) and supported by the cylindrical part (52). A nozzle (83) is retained in a way to freely move along the axial direction (Z direction) relative to the retaining hole equipped inside the suction nozzle seat (51). The nozzle (83) is provided with two communication holes (FH1. FH2). Two communication holes (CH1, CH2) are also equipped inside the suction nozzle seat (51). The communication and connection of the communication holes are switched through the descending of the nozzle toward the element absorbing postion and the rising of the nozzle towards the rising end. The air pressure located on the front of the nozzle (83) and supplied from an air pressure guiding channel (831) is adjusted.

The invention discloses an infusion device and an infusion control method. The infusion device comprises an air pump, a balance cabin, a gas transmission tube, an infusion tube, a light curtain detection assembly and a first controller; the air pump is connected with the balance cabin; the balance cabin is connected with a liquid container through the gas transmission tube; a drip pot is arranged inside the infusion tube; liquid flowing into the infusion tube from the liquid container forms into liquid drops in the drip pot; the light curtain detection assembly is used for detecting the liquid drops in the drip pot through a generated detection light curtain and sending a first detection signal to the first controller when detects the liquid drops; the first controller is used for calculating first dripping speed of the liquid drops in the drip pot according to the first detection signal, comparing the first dripping speed with preset dripping speed and controlling the air pump to pump gas to the balance cabin to control the balance cabin to discharge the gas to adjust an air pressure value inside the balance cabin to enable the first dripping speed to be matched with the preset dripping speed. Accordingly, infusion stability and accuracy can be guaranteed and medical negligence can be reduced.

The invention relates to a high-environmental-tolerance air pressure type anemometer. The high-environmental-tolerance air pressure type anemometer comprises a flow guide assembly, an air pressure detection assembly and a pressure stabilizing assembly. The flow guide assembly includes an air duct cavity composed of an upper drainage surface and a lower drainage surface, wherein the upper drainage surface and the lower drainage surface are parallel to each other; the air pressure detection assembly includes a closed cavity, the closed cavity is located in the center of the low drainage surface, the upper portion of the closed cavity is of a spherical surface shape, the spherical surface of the closed cavity is made of a soft film, and a pressure sensor is arranged at the round bottom of the closed cavity; a plurality of air guide plates are arranged between the upper drainage surface and the lower drainage surface in an annular array mode, the axes of the air guide plates are located in the direction of the diameter of the closed cavity, and the plane where the air guide plates are located is perpendicular to a pressure bearing surface; the pressure stabilizing assembly comprises a pressure controller and an air pump, the ultimate bearing pressure of the spherical surface of the closed cavity is A, and actually measured wind pressure is B; when (A-B) / A is smaller than 10 percent, the pressure controller starts the air pump to pressurize the closed cavity; when (A-B) / A is greater than 10 percent, pressurization is stopped.

The invention relates to a low-wind-resistance anemometer. The low-wind-resistance anemometer comprises a flow guide assembly, a wind pressure detection assembly and a pressure stabilizing assembly. The flow guide assembly comprises an air channel cavity composed of an upper flow guide surface and a lower flow guide surface which are parallel to each other. The wind pressure detection assembly comprises a closed cavity. The closed cavity is located at the center of the lower flow guide surface. The upper portion of the closed cavity is spherical. The spherical surface of the closed cavity is made of a soft thin film. The round bottom of the closed cavity is provided with a pressure sensor. A plurality of wind deflectors are arranged between the upper flow guide surface and the lower flow guide surface in an annular array mode. The axes of the wind deflectors are located in the diameter direction of the closed cavity. The planes where the wind deflectors are located are perpendicular to a pressure borne surface. A plurality of stand columns are arranged between the upper flow guide surface and the lower flow guide surface. The stand columns are arranged around the closed cavity. An annular trapezoidal filter screen is arranged between the edge of the upper flow guide surface and the edge of the lower flow guide surface.

The invention discloses a quick-to-replace minimally invasive robot end surgical instrument, and belongs to the field of medical instruments. The quick-to-replace minimally invasive robot end surgicalinstrument comprises a control part and an operating part which are connected, wherein the control part is mounted on a robot, and the operating part is used for surgical operation; the surgical instrument is characterized in that the operating part comprises a second power rod, a second fixing rod, a forceps head and a joint part; the second fixing rod is connected with the joint part; the forceps head is hinged to the joint part; the second power rod drives the forceps head to be opened and closed; the section of the second power rod is semicircular; a protruding part is arranged at the tail end of the second power rod; the section of the second fixing rod is semicircular; and a protruding part is arranged at the tail end of the second power rod.

The invention relates to the technical field of cold-foil printing, in particular to a conveying device used for printed matter cold-foil printing. The conveying device used for printed matter cold-foil printing comprises a rotating roller, a rubber cylinder is sleeved outside the rotating roller, a plurality of uniformly distributed collecting and distributing pipe cavities I and collecting and distributing pipe cavities II are annularly arranged in the rotating roller, an annular pipe cavity I is formed in a position, on one side of the collecting and distributing pipe cavities I, on the rotating roller, and an annular pipe cavity II is formed in the position, on one side of collecting and distributing pipe cavities II, on the rotating roller. By means of the structural design of the conveying device used for printed matter cold-foil printing, time pressure of telescopic columns on the rubber cylinder is achieved, mutual positioning connection is achieved through friction force, therotating roller rotates to stably drive the rubber cylinder, and if the rubber cylinder needs to be taken down, a pressure rod needs to be manually pulled in a reciprocating mode, so that controllinga sliding column is realized, then a plurality of telescopic columns retract into the rotating roller, the synchronous fixing state of the rotating roller and the rubber cylinder is broken, the rubbercylinder is pulled down from the rotating roller, and the operation is easy, convenient and fast.

The invention discloses a dust removing device for an air outlet of a vehicle-mounted air conditioner. The dust removing device comprises a basal body (1), a louver (2), a suction fan (12), a dust storing tank (13) and a baffle (5), wherein an air outlet is formed in the basal body (1); the louver (2) is hinged to the basal body (1), and the air outlet can be sealed through rotation; an air suction port is formed in the side surface of the basal body (1); the suction fan (12) is arranged at the air suction port, and is connected to the dust storing tank (13); the dust storing tank (13) is arranged on one side, in which the air suction port is formed, of the basal body (1); and one end of the baffle (5) enters between the basal body (1) and the dust storing tank (13) in an attack manner, and can slide in the length direction to keep out the air outlet. According to the dust removing device for the air outlet of the vehicle-mounted air conditioner disclosed by the invention, the problem that in the prior art, dust removal cannot be performed on the air outlet of the vehicle-mounted air conditioner is solved.

The invention discloses a novel air inlet and exhaust device of a water supply flow-stabilizing tank. The novel air inlet and exhaust device comprises a base, wherein support rods fixedly connected with the base are symmetrically arranged on the upper side of the base, a first rotation groove and a second rotation groove are arranged in each support rod, a first rotation shaft rotatably connectedwith the first rotation groove is inserted in the first rotation groove, a second rotation shaft rotatably connected with the second rotation groove is inserted in the second rotation groove, the first rotation shaft is positioned below the second rotation shaft, and a first rotation plate is arranged on the first rotation shaft. The novel air inlet and exhaust device of the water supply flow-stabilizing tank has the advantages that through the combined action of air pressure in a tank body and the external atmospheric pressure, when air pressure in the tank body is relatively high, a connecting rope pulls a pressure block, then air can be exhausted from an air outlet pipe, meanwhile, the exhausted air passes through a drying device, thus moisture can be eliminated, therefore, the use safety of the device is improved, when air pressure in the tank body is relatively low, under the effect of the external atmospheric pressure, the air inlet pipe is opened, air enters the tank, and the air pressure in the tank is regulated.

The invention belongs to the field of municipal machinery, particularly relates to a paver for municipal engineering construction and a construction method of the paver, and provides the following scheme aiming at the problems that an existing adopted automatic paver is high in cost on one hand, complex in operation on the other hand and partially needs to be operated manually. The scheme is that the paver comprises a machine body, a mounting box is fixedly mounted on one side of the machine body, an inclined panel is fixedly mounted on the inner wall of the bottom of the mounting box, a plurality of conveying rollers are rotatably connected into the mounting box at equal intervals, a discharging hole is formed in the inner wall of the bottom of one side of the mounting box, and the conveying rollers are all located on one side of the inclined panel. Enclosures are fixedly installed on both sides of the inclined panel. According to the paver, automatic floor tile laying can be achieved, and the floor tiles can be compacted after being laid, so that manual laying can be effectively replaced, the manual use cost is greatly reduced, the working efficiency can be effectively improved, and therefore the paver has good practicability.

The invention relates to the technical field of cosmetic filling, and discloses a cosmetic filling device capable of removing bubbles and suitable for different concentrations. The cosmetic filling device comprises an air pressure tank, a feeding pipe is inserted into the top of the air pressure tank, a vacuum cover is fixedly connected to the inner top of the air pressure tank, a swing door is movably connected to the top of the vacuum cover, a suction block is fixedly connected to the inner wall of the air pressure tank, a discharging pipe is inserted into the bottom of a hopper, a stirringwheel is fixedly connected into the discharging pipe, a filling head is inserted into the bottom of the air pressure tank, a sliding rheostat is fixedly connected to the inner bottom of the air pressure tank, and a rotating wheel is fixedly connected to the bottom of the hopper. According to the cosmetic filling device capable of removing bubbles and suitable for different concentrations, the hopper descends to drive a push rod to descend, the push rod descends to reduce the air pressure in the air pressure box, the air pressure box reduces an air bag, and the air bag and an air pressure pipeare used in cooperation, so that the effect of adjusting the air pressure according to the concentrations is achieved.

The invention relates to an anti-fouling type anemograph. The anti-fouling type anemograph comprises a flow diversion assembly and an air pressure detection assembly. The flow diversion assembly comprises an air duct cavity composed of an upper drainage face and a lower drainage face which are parallel to each other. The air pressure detection assembly comprises a closed cavity. The closed cavity is located in the center of the lower drainage face, the upper portion of the closed cavity is spherical, and a pressure sensor is arranged at the round bottom of the closed cavity. The closed cavity is filled with air. An annular filter net is arranged between the upper drainage face and the lower drainage face. The anti-fouling type anemograph further comprises a shell, the shell comprises a circular-truncated-cone-shaped upper shell arranged at the upper portion of the upper drainage face and a lower shell arranged at the lower portion of the upper drainage face, the lower shell comprises an air guide ring and a supporting part, the closed cavity is fixed to the supporting part, the air guide ring is fixedly connected with the supporting part through multiple connecting rods, and an annular dirt discharge cavity with the two open ends is formed between the air guide ring and the supporting part. An annular air guide cavity is formed between the bottom of the upper shell and the upper portion of the air guide ring.

The invention discloses a mechanical filtering device integrating filtering and extracting and provided with a clamping structure. The mechanical filtering device comprises a filtering box, an extracting box and a fixing frame. The filtering box is arranged on the extracting box and is communicated with the extracting box; a connecting plate and a receiving hopper are arranged in the filtering box; a primary filter screen is arranged on the connecting plate; a first advanced filter membrane and a second advanced filter membrane are arranged on the receiving hopper; a rotating part is vertically arranged on the material receiving hopper and is rotationally connected with the filtering box; a stirring piece is arranged on a first output shaft and is positioned in the receiving hopper; a first transmission part is in transmission connection with a second output shaft, a second transmission part is in transmission connection with the rotating part, and the first transmission part is in transmission connection with the second transmission part; a pressurizing mechanism is arranged on the filtering box; a liquid inlet pipe is arranged on the filtering box; a pressure relief pipe is arranged on the filtering box; and the fixing frame is arranged on the filtering box. The device is easy to operate, good in filtering effect and high in filtering efficiency, integrates filtering and extraction, is provided with a clamping structure, is convenient to use, remarkably improves the operation efficiency, and saves time and labor.

The invention relates to a steam supply equalizing device for sealing the shaft end of a steam turbine, comprising: a shaft seal body chamber of a low-pressure cylinder, a rotor of the low-pressure cylinder, a steam seal block and a central control module. The present invention sets the central control module so that the central control module can select the corresponding steam flow according to the load and back pressure of the unit, which can effectively prevent the air pressure in the shaft seal chamber of the low-pressure cylinder caused by too high steam flow when the low load and back pressure are selected. If the temperature is too high, the steam leakage in the chamber of the shaft seal body of the low-pressure cylinder will occur, which effectively improves the steam seal efficiency of the device. At the same time, a steam return chamber is also provided in the shaft seal body chamber of the low-pressure cylinder, and by setting a steam return valve at the port of the steam return chamber and adjusting the opening of the steam return valve, the pressure in the shaft seal body chamber of the low-pressure cylinder can be effectively adjusted. The total amount of steam, thereby completing the efficient adjustment of the air pressure in the chamber of the shaft seal body of the low-pressure cylinder, further improving the steam seal efficiency of the device.

The invention discloses a manufacturing method of a centering rod for measuring. A centering rod bottom tip, a carbon fiber tube with decimeter scales, a fixing clamp with a round level bubble, a locking system, an aluminum alloy round pipe with scales, a connector, an air pressure adjusting piston are manufactured. The centering rod bottom tip is connected with the bottom of the carbon fiber tube with the decimeter scales, the fixing clamp with the round level bubble is arranged at the upper end of the carbon fiber tube with the decimeter scales and is used for fixing the locking system, the aluminum alloy round tube with scales is inserted into the hollow carbon fiber tube with the decimeter scales by the locking system, the connector is arranged at the upper end of the aluminum alloy round tube with the scales, and the air pressure piston is arranged at the lower end of the aluminum alloy round tube with the scales. The centering rod for measuring can fast, conveniently and firmly fix an inner tube and an outer tube of the centering rod together, the inner tube can be fixed at any position and the centering rod is convenient and fast to stretch and retract.

The invention discloses air pressure gun pressure stabilizing equipment for demolding of finished gloves, and belongs to the technical field of glove demolding. The air pressure gun pressure stabilizing equipment comprises a box body, two symmetrical box doors are arranged on the front face of the box body, a power supply connecting wire is arranged on the back face of the box body, an air compressor is arranged in the box body, an output end of the air compressor is connected with a second air guide pipe, a pressure stabilizer is arranged at the other end of the second air guide pipe, a first air guide pipe is arranged at the top of the pressure stabilizer, the other end of the first air guide pipe is connected with an air nozzle, and an air channel is formed in the air nozzle. By arranging the pressure stabilizer, air can be pressed into a first air wall and a second air wall through the second air guide pipe during use, the first air wall can be extruded through a pressure stabilizing spring and a spring plate, so that the air pressure in the first air wall is always kept stable, and under the action of mechanical elastic force of the pressure stabilizing spring, the air pressure can be adjusted more sensitively, and the pressure stabilizing effect of the equipment in use is improved.

The invention relates to a waterproof treatment process for a hardware product. The waterproof treatment process for the hardware product comprises the following steps that A, corresponding waterproofcoating materials are selected according to different base materials and functions of the product; B, the corresponding waterproof coating materials are placed into needle cylinders of different dispensers; C, dispensing paths and glue discharging quantities of the different dispensers are set according to requirements; and D, glue dispensing is conducted on corresponding positions, made from thedifferent base materials and having the different functions, of the product through the dispensers, and the product is rapidly placed to allow glue to automatically flow flat. By adoption of the technical scheme, the requirement for light and thin design of existing products can be met, the number of elastomers used by traditional structures for water prevention is effectively reduced, the numberof parts of the product is reduced, the production efficiency is improved, and meanwhile, the requirement for efficient water prevention of the hardware product is effectively met.

The invention discloses a novel air inlet and exhaust device of a water supply flow-stabilizing tank. The novel air inlet and exhaust device comprises a base, wherein support rods fixedly connected with the base are symmetrically arranged on the upper side of the base, a first rotation groove and a second rotation groove are arranged in each support rod, a first rotation shaft rotatably connectedwith the first rotation groove is inserted in the first rotation groove, a second rotation shaft rotatably connected with the second rotation groove is inserted in the second rotation groove, the first rotation shaft is positioned below the second rotation shaft, and a first rotation plate is arranged on the first rotation shaft. The novel air inlet and exhaust device of the water supply flow-stabilizing tank has the advantages that through the combined action of air pressure in a tank body and the external atmospheric pressure, when air pressure in the tank body is relatively high, a connecting rope pulls a pressure block, then air can be exhausted from an air outlet pipe, meanwhile, the exhausted air passes through a drying device, thus moisture can be eliminated, therefore, the use safety of the device is improved, when air pressure in the tank body is relatively low, under the effect of the external atmospheric pressure, the air inlet pipe is opened, air enters the tank, and the air pressure in the tank is regulated.

The invention discloses and provides a cavity constant-pressure device with simple structure, reasonable design and capacity to timely adjust pressure intensity change in a sealing environment. The device comprises a hollow shell body, wherein a constant-pressure sealing structure is installed in the shell body in an adaptive mode, a fluid is stored in the constant-pressure sealing structure, onlyone air vent is formed in the constant-pressure sealing structure, and the air vent is hermetically connected with an external sealing device. The cavity constant-pressure device can be applied to the technical field of pressure intensity adjusting devices.

The invention relates to a comprehensive treatment device for feces, which comprises a feces collection device, a device main body shell, a feces storage chamber part, a steam treatment device, a fermentation chamber and a temporary fertilizer storage chamber. By installing a detachable feces collection device, users can collect feces at any time and finally collect them in the feces storage chamber. After steam treatment and fermentation, the feces are stored as fertilizer, which not only has a very good effect on improving the urban environment , It can also provide organic fertilizers, which can really turn harm into benefit.

The invention relates to the technical field of medical instruments, in particular to a pelvic bone injury emergency fixing device which comprises a mounting plate, a sliding block, a lead screw, a mounting rod, a fixing ring, an air bag, an adjusting assembly and a massage assembly, the mounting plate is provided with a groove, the groove is located in the mounting plate, an opening faces one side of the mounting plate, and the sliding block is slidably connected with the mounting plate and located in the groove; the lead screw is rotationally connected with the mounting plate and rotationally connected with the sliding block, the mounting rod is fixedly connected with the sliding block and slidably connected with the mounting plate, the fixing rings are mounted on the mounting rod through the adjusting assembly, the massage assembly is arranged on the fixing rings, the two fixing rings are close to each other and attached to the buttocks of the patient, and the pelvic bone of the patient is rapidly positioned and fixed; the air bag is inflated through the air pump, the air bag swells, and the pelvis of the patient is pushed, folded and fixed, so that the pelvis of the patient is rapidly and emergently fixed.

The invention relates to an engine plateau air inlet simulation device. The engine plateau air inlet simulation device comprises a pressure stabilizing box. The pressure stabilizing box is separated by a separator plate into a first cavity and a second cavity. The first cavity has an air inlet connected with an air supply system and an air outlet connected with an engine air inlet pipe. The second cavity is used for connecting with a pressure supply device. The pressure stabilizing box is provided with a pressure regulating structure for enabling the first cavity and the second cavity to be communicated or blocked so as to adjust the pressure in the first cavity. The air supply system supplies air into the first cavity of the pressure stabilizing box through the air inlet, and the pressure regulating structure can enable the air in the first cavity to be discharged into the second cavity so as to reduce pressure in the first cavity, or enable the air in the second cavity to flow into the first cavity so as to increase the pressure in the first cavity, thereby realizing adjustment of pressure of air entering the engine air inlet pipe and achieving an effect of accurately controlling inlet pressure of an engine by simulating plateau air inlet states.

The invention relates to the technical field of cosmetic filling, and discloses a cosmetic filling device capable of removing air bubbles and suitable for different concentrations, including an air pressure tank, a feeding pipe is inserted into the top of the air pressure tank, and the inner top of the air pressure tank A vacuum cover is fixedly connected, the top of the vacuum cover is movably connected with a swing door, the inner wall of the air pressure tank is fixedly connected with a suction block, the bottom of the hopper is plugged with a discharge pipe, and the inside of the discharge pipe is fixed A stirring wheel is connected, a filling head is plugged into the bottom of the air pressure tank, a sliding rheostat is fixedly connected to the inner bottom of the air pressure tank, and a runner is fixedly connected to the bottom of the hopper. This can remove air bubbles and is suitable for cosmetic filling devices with different concentrations. The drop of the hopper drives the push rod down, and the drop of the push rod reduces the air pressure in the air pressure box, and the air pressure box reduces the air bag. The effect that the air pressure can be adjusted according to the concentration is achieved.

The invention belongs to the field of municipal machinery, in particular to a paver for municipal engineering construction and a construction method thereof. Aiming at the existing automatic paver which has been adopted, on the one hand, the cost is high, on the other hand, the operation is complicated, and part of it requires For the problem of manual operation, the following scheme is proposed. The paver includes a machine body. An installation box is fixedly installed on one side of the body, and a sloping plate is fixedly installed on the bottom inner wall of the installation box. A plurality of conveying rollers are rotatably connected, and a discharge hole is opened on the inner wall of the bottom of one side of the installation box, and the plurality of conveying rollers are all located on one side of the inclined plate, and both sides of the inclined plate are fixedly installed with coaming plates , the present invention can realize automatic laying of floor tiles, and can carry out compaction after laying floor tiles, can effectively replace manual laying with this, greatly reduces labor use cost, and can effectively improve work efficiency, therefore has good practicability.

An air pressure adjusting device of an automatic dispensing device comprises a fixed support, a drive unit and an adjusting through-pipe. The air pressure adjusting device also contains an eccentric wheel. The drive unit contains a rotating shaft which is fixed to the eccentric wheel. The fixed support contains a support body and a first interconnecting piece and a second interconnecting piece which extend from the support body. The eccentric wheel is mounted between the first interconnecting piece and the second interconnecting piece. The adjusting through-pipe is arranged on the eccentric wheel and two ends of the adjusting through-pipe are respectively installed on the first interconnecting piece and the second interconnecting piece. The rotating shaft of the drive unit is used for rotating in a first rotation direction to drive the eccentric wheel to rotate so as to make the eccentric wheel squeeze the adjusting through-pipe and rotating in a second rotation direction, which is opposite to the first rotation direction, to drive the eccentric wheel to rotate so as to make the eccentric wheel relax the adjusting through-pipe, thus adjusting air pressure in the adjusting through-pipe.

The invention discloses an infusion device and an infusion control method. The infusion device comprises an air pump, a balance cabin, a gas transmission tube, an infusion tube, a light curtain detection assembly and a first controller; the air pump is connected with the balance cabin; the balance cabin is connected with a liquid container through the gas transmission tube; a drip pot is arranged inside the infusion tube; liquid flowing into the infusion tube from the liquid container forms into liquid drops in the drip pot; the light curtain detection assembly is used for detecting the liquid drops in the drip pot through a generated detection light curtain and sending a first detection signal to the first controller when detects the liquid drops; the first controller is used for calculating first dripping speed of the liquid drops in the drip pot according to the first detection signal, comparing the first dripping speed with preset dripping speed and controlling the air pump to pump gas to the balance cabin to control the balance cabin to discharge the gas to adjust an air pressure value inside the balance cabin to enable the first dripping speed to be matched with the preset dripping speed. Accordingly, infusion stability and accuracy can be guaranteed and medical negligence can be reduced.

The invention relates to the technical field of feeding supplies, in particular to a nipple with an air return valve and a feeding bottle applying the nipple. The nipple is a formed product which is made from soft resin and other elastomers and is roughly in a conical hollow body as a whole; a diameter-reducing part groove formed by grooves or slots is formed between a bulging part and a flange part of the nipple and has the size large enough for the flange part of a lid matched with the groove to enter; the flange part is provided with the air return valve, and the air return valve is formedin the mode that the lower surface of an integrated part protrudes, and is not limited to the thickness interior of the flange; the lower portion of the integrated part forms movable sheets, namely valve bodies with thin walls; the valve bodies can be stretched to form a slit; the integrated part forms a gap through a sinking space. According to the nipple, through the arrangement of the air return valve, the balance between the inner and outer pressure of the feeding bottle can be achieved.