141results about How to "Eliminate negative pressure" patented technology

Provided herein is an easily removed menstrual cup which includes a main body in which an opening is formed at one side, a storage configured to accommodate menstrual blood therein is formed, and an air inlet is formed at an upper end; an air flow path formed between an outer wall and an inner wall of the main body and configured to connect the air inlet to the outside of the main body; and an air inflow controller installed on the air flow path and configured to control an inflow of external air into the air inlet through the air flow path.

A fluid-filled type vibration damping device including a partition member having a moveable film and a short passage interconnecting a pressure receiving chamber and an equilibrium chamber. A valve member that switches between a communicating state and a shut off state of the short passage projects from the moveable film. The valve member has a thick walled part and a thin walled part, the thin walled part being pressed on an inner wall surface of the short passage. A pressure of the pressure receiving chamber is applied through the short passage to a pressure receiving chamber side surface of the thick walled part, while an equilibrium chamber side surface thereof is supported by the partition member. The pressure of the pressure receiving chamber is applied to one side of the thin walled part and a pressure of the equilibrium chamber is applied to another side thereof through the short passage.

A beverage dispenser is proposed which includes a soft raw water container and which makes it possible to spontaneously use up drinking water in the container. A water passage tube (12) of a container connecting portion (10) includes a tubular partitioning wall (13) dividing the interior of the water passage tube (12) into a water passage (14) communicating with a water passage hole (14a), and an air passage (15) communicating with the water passage (14) through a small air passage hole (15a). A water passage pipe (16) is connected to the water passage (14). The water passage tube (12) has a base portion (12a) formed with an opening (15b) communicating with the air passage (15). An air passage pipe (17) is connected to the opening (15b) and hangs vertically downwardly into a low-temperature tank (2). An on-off valve (19b) is provided at the free end of the air passage pipe (17) which is adapted to open when the water level in the low-temperature tank (2) lowers. With this arrangement, when drinking water in the raw water container (A) runs low and the water level in the low-temperature tank (2) remains low, air in the low-temperature tank (2) is introduced into the raw water container (A) through the on-off valve (19b), which is now open, the air passage pipe (17), the air passage (15) and the small air passage hole (15a). This eliminates a negative pressure in the raw water container (A), thereby allowing water remaining in the container to be dropped into the tank.

A multifunctional automatic adjuster comprises an air and water separator, a positive and negative pressure protector, an air pipe and a methane pipe. The methane pipe comprises a left methane branch and a right methane branch, one ends of the left methane branch and the right methane branch are communicated with a methane area in a fermenting tank, the other ends of the left methane branch and the right methane branch extend into the positive and negative pressure protector and the air and water separator, one end of the air pipe is communicated with a pressurizing fan, the other end of the air pipe extends into the positive and negative pressure protector, the top of the positive and negative pressure protector is provided with an exhaust port, a water inlet pipe is arranged on the sidewall of the positive and negative pressure protector close to the top, a water outlet is arranged at the position of the positive and negative pressure protector near the bottom, the other end of thewater outlet is communicated with a straight discharge valve, and a plurality of water level pressure adjusting valves connected in parallel are arranged between the straight discharge valve and the water inlet pipe vertically. The multifunctional automatic adjuster is fine in energy saving and high in automaticity and has multiple functions of automatic air and water separation, automatic water discharge and replenishment, automatic air exhaust, synchronous methane leakage waste prevention, negative pressure protection, automatic constant pressure keeping and the like.

A blade wheel for centrifugal pump (or blower) is composed of hub, webs and two or more blades consisting of the primary and secondary blades, which are overlapped at the small radium position and connected by a sealing plate at the maximal radium position. Its advantages are high efficiency and low energy consumption.

A fluid filled type vibration damping device including: a partition member having a communication passage connecting a pressure receiving and equilibrium chambers; an obstructing rubber elastic plate juxtaposed against the communication passage from a pressure receiving chamber side, adapted to obstruct the communication passage, and arranged to be exposed to pressure of the pressure receiving and the equilibrium chamber at both faces; and a constraining member provided for retaining an outer peripheral section of the obstructing rubber elastic plate in contact against the partition member at multiple locations. The constraining member provides an opening / closing control member operated to induce the obstructing rubber elastic plate to push against the partition member and close off the communication passage, and to induce elastic deformation of the obstructing rubber elastic plate to be separated from the partition member.

The invention relates to an adsorption type fast film sticking device, which comprises a film unwinding part for conveying the film backward; a film pulling part for driving one end of the film to move backward to make the film unroll in a horizontal direction; a feeding part, the The feeding part is used to intermittently supply the sheet material to the film pulling part to make the sheet fit with the unfolded film; the film pulling part includes a rotating mechanism and several groups of supporting cutters which are arranged on the rotating mechanism and perform rotating motion under the driving of the rotating mechanism. A cutting mechanism and a negative pressure supply mechanism arranged on one side of the rotary mechanism; the feeding part includes a clamping mechanism for supporting the sheet material and a blanking material for controlling the sheet material in the clamping mechanism to fall intermittently with the rotation of the rotary mechanism Mechanism; the invention overcomes the problems of unstable film unfolding during the film sticking process, easy occurrence of wrinkles and inability to achieve continuous and efficient film sticking and complete film cutting while sticking the film.

Tertiary nozzle of port for gas injection into furnace includes a contracted flow producing channel provided obliquely toward central axis from the upstream side of gas flow so that the gas flow has a velocity component heading from the outer circumferential side of the port toward the central axis and a velocity component heading along the central axis toward the interior of the furnace, and including louver disposed for guiding so that the gas flows along the surface of throat wall of enlarged pipe configuration wherein the gas channel is enlarged at a furnace wall opening disposed at an outlet area of the contracted flow producing channel. Accordingly, there can be provided a gas injection port that not depending on conditions, such as the flow rate of gas injected from the port, without inviting any complication of apparatus structuring or cost increase, enables preventing of the growth in lump form of clinker caused by ash adhesion and fusion on the wall surface of throat enlarged pipe portion of the furnace.

The invention discloses a mechanical-hydraulic servo control device for multi-shaft automobile pure rolling steering. The mechanical-hydraulic servo control device is applied to the field of automobile steering. The mechanical-hydraulic servo control device mainly comprises a switch valve, a pressure reducing valve, a one-way valve, a transverse pull rod telescoping cylinder, a mechanical-hydraulic servo control valve, an angular displacement amplifying mechanism and the like. The mechanical-hydraulic servo control valve is used for carrying out servo control over the transverse pull rod telescoping cylinder, and it is effectively ensured that all steering wheels meet the Ackerman steering condition; by means of negative feedback control of the transverse pull rod telescoping cylinder and the mechanical-hydraulic servo control valve, high-precision dynamic pure rolling steering of an automobile is achieved; oil is supplemented to a feedback cavity automatically through the switch valve, the pressure reducing valve and the one-way valve, and generation of negative pressure is eliminated. Preferably, by means of a segmented multi-stage cam curve in the mechanical-hydraulic servo control device, the transverse pull rod telescoping cylinder can be locked mechanically and hydraulically, the risk in the high-speed traveling process is reduced while the pure rolling steering effect of the system is guaranteed, and the safety of high-speed traveling of the multi-shaft automobile is promoted.

The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.

A beverage dispenser is proposed which includes a soft raw water container and which makes it possible to spontaneously use up drinking water in the container. A water passage tube (12) of a container connecting portion (10) includes a tubular partitioning wall (13) dividing the interior of the water passage tube (12) into a water passage (14) communicating with a water passage hole (14a), and an air passage (15) communicating with the water passage (14) through a small air passage hole (15a). A water passage pipe (16) is connected to the water passage (14). The water passage tube (12) has a base portion (12a) formed with an opening (15b) communicating with the air passage (15). An air passage pipe (17) is connected to the opening (15b) and hangs vertically downwardly into a low-temperature tank (2). An on-off valve (19b) is provided at the free end of the air passage pipe (17) which is adapted to open when the water level in the low-temperature tank (2) lowers. With this arrangement, when drinking water in the raw water container (A) runs low and the water level in the low-temperature tank (2) remains low, air in the low-temperature tank (2) is introduced into the raw water container (A) through the on-off valve (19b), which is now open, the air passage pipe (17), the air passage (15) and the small air passage hole (15a). This eliminates a negative pressure in the raw water container (A), thereby allowing water remaining in the container to be dropped into the tank.

An apparatus to allow or stop a flow into a piping system or an enclosed environment comprises (a) a housing having an upper flow passage and a lower flow passage; (b) a valve seat, wherein the valve seat is between the upper flow passage and the lower flow passage, wherein at least one opening is formed on the valve seat; (c) at least one rotary valve inside the housing, wherein each of the at least one rotary valve further comprises a main body and two guides mounted to the main body opposite to each other, and wherein the at least one rotary valve can move inside the upper flow passage and above the valve seat; and (d) at least two guide rails inside the upper flow passage for guiding each of the at least one rotary valve between an open position and a closed position.

An oil supply groove 12 in communication with a pump room 2A is formed above a bearing 2B of a housing 2, and an open air groove 14 in communication with an atmospheric air is formed at a position rotated around the bearing 2B by 90° from the oil supply groove. In a shank 3B of a rotor 3, a branch passage 11a branching from an oil passage 11 formed in its axial direction to the diametrical direction of the shank, and an open air passage 13 formed in the direction perpendicular to the branch passage are formed.Then, the branch passage and the oil supply groove communicate with each other, at the same time, the open air passage and the open air groove are arranged to also communicate with each other, and when the oil passage and the oil supply groove communicate with each other as the rotor stops, then an atmospheric air flowing in from the open air passage eliminates a negative pressure in the pump room, thereby the lubricating oil is prevented from flowing into the pump room in large quantities.An amount of the lubricating oil flowing into pump room at stop of the rotor can be reduced to prevent the vane from being damaged and an amount of the lubricating oil consumed due to rotation of the rotor can be controlled.

A common rail fuel injection system having a low-pressure region from which a high-pressure fuel pump acts on fuel with high pressure and delivers it to a high-pressure fuel accumulator from which fuel is supplied to injectors that inject the highly pressurized fuel into the combustion chamber of an internal combustion engine in which the high-pressure pump, the high-pressure fuel accumulator, and the injectors are associated with a high-pump, pressure region. In order to avoid undesirable delays in the starting of the internal combustion engine, a check valve device is connected between the low-pressure region and the high-pressure region so that when a negative pressure is generated in the high-pressure region, fuel flows from the low-pressure region into the high-pressure region.

The invention discloses a flow stabilizing tank. The flow stabilizing tank comprises a tank body, the tank body is provided with a water inlet, a water outlet, a liquidometer, a pressure gauge and an exhaust valve, wherein a water source enters the tank body through the water inlet, the water source flows out of the tank body through the water outlet, the liquidometer is used for detecting the water level in the tank body, the pressure gauge is used for detecting the pressure in the tank body, and the gas in the tank body is exhausted through the exhaust valve. The flow stabilizing tank is characterized in that an energy storage gas bag capable of being elastically deformed is arranged inside the tank body. The flow stabilizing tank has the advantages that maintaining is easy and convenient, exhausting is complete, no air exists in the tank body, the sanitation and hygiene of water quality are guaranteed, more importantly, the flow stabilizing tank can prevent the negative pressure from being produced, the pressure difference brought by pressure drop when a municipal pipe is in a busy hour can be automatically compensated, and the overlying time can be long and stable.

The invention relates to a method for controlling the pressure inside a fuel tank of an internal combustion engine of a motor vehicle includes relieving the pressure in the fuel tank when reaching a predetermined upper overpressure threshold value. In a device for controlling the pressure in the fuel tank, the pressure in the fuel tank is only relived partially, wherein the pressure relief is less than 20%, preferably less than 10% and optimally less than 5% of the upper overpressure threshold value in order to reduce the emission of volatile hydrocarbons into the environment.

The invention discloses a fireproof and explosion-proof new energy automobile storage battery structure, and relates to the technical field of storage batteries. Aiming at the problems of fire or explosion and the like caused by short circuit of electronic components due to high temperature generated when a storage battery works and contact between positive and negative electrodes of the storage battery and an external object, the fireproof and explosion-proof new energy automobile storage battery structure comprises a battery shell. According to the fireproof and explosion-proof type new energy automobile storage battery structure, cooling liquid can be cooled through air cooling, then the storage battery is circularly cooled through the cooling liquid, the situation that the temperature of the storage battery is too high, components are damaged, and short circuit occurs is prevented, high-temperature and high-pressure gas generated when the storage battery works is exhausted, meanwhile, external sewage is prevented from entering, the storage battery can also absorb air to the outside to eliminate the negative pressure in the working environment and filter moisture in the air, and when the temperature of the storage battery is too high, electrolyte can be automatically extracted from the storage battery, the chemical reaction rate of the storage battery is reduced, and fire disasters and explosions caused by high temperature are prevented.

The invention relates to a push-pull gun for matched use of the hemorrhoids ligator, comprising a gun case (2), front and back slides (14) (3), upper and lower slide gear racks (4), (6), a gear (5), a large trigger link rod (7), a large trigger (8), a ratchet (9), a small trigger (11), upper and lower link rods of small trigger (12), (13) and a thimble device (15), wherein the front and back slide lower part are inlaid inside the gun case, the upper and lower slide gear racks are displaced inside the gun case, the gear (5) is displaced between the upper and lower slide rack, the upper slide rack (4) connects with the back slide seat (3), the lower slide rack (6) hinges with the large trigger link rod (7) and the larger trigger link rod (7) hinges with the larger trigger (8), the lower part of the large trigger (8) similar to fan ratchet in shape matches with the ratchet (9), the front slide (14) hinges with the upper rod (12) of the small trigger, the upper link rod (12) hinges with the lower link rod of the small trigger (13), the lower link rod (13) hinges with small trigger (11), the thimble device is provided inside the gun case on the small trigger (11). The invention can be operated by one person conveniently without contact with focus of the patient.

A detachment system for a delivery aerial drone is disclosed. The detachment system uses a pump to apply a negative pressure to a suction cup for attaching an object to be delivered. The weight of the object is coupled to a mechanical switch, such that setting down the object opens the switch and disconnects the pump. Once the pump is disconnected from its power source, the suction is removed and the object disconnects from the vacuum system. The weight of the object is coupled to a mechanical switch, such that setting down the object opens the switch and disconnects the pump. Thus, the object releases once it is gently placed on a surface such that its weight is removed from the drone.

The invention discloses an automatic detection device and detection method for a circuit board and belong to the technical field of circuit board detection. The device comprise a circuit board detection module and a device body; transmission wheels which are horizontally distributed are placed at two ends in the device body; a first crawler belt is connected between the two transmission wheels; the circuit board detection module is installed at the top of the device body above the first crawler belt; clamping bases are evenly welded to the outer surface of the first crawler belt; and two rectangular column-shaped discharging cylinders are symmetrically welded to the top of the device body. A second clamping plate, a positioning plate and a first clamping plate are in contact with the sideedge of the circuit board, the circuit board is clamped through suction cups, damage-free clamping of the circuit board is achieved, deformation and damage of the circuit board are prevented, meanwhile, the circuit board is supported and dragged through L-shaped material receiving bases on second crawler belts on the two sides of a discharging barrel, and under the gravity and falling force of thecircuit board, the other group of L-shaped material receiving bases are displaced, so that the use is convenient.

A foamer dispenser, comprising a double pump (30) individually sucking, pressurizing, and force-feeding contents in a container and the outside air, a head (40) forming a confluence space (R) for connecting the out-side passages (P3) and (P4) of the pump (30) and having a passage (42) for joining the space (R) to an injection end (41) led to the outside, and a foaming element (50) installed in the passage (42) of the head (40). The foaming element (50) further comprises a jet ring (51) having an in-side opening (H) with an opening area smaller than that of the passage (42) of the head (40) and a cylindrical body (51b) with an opening area larger than that of the opening (H) and joined to the passage (42) and meshes (52a) installed facing the opening (H), brought into contact with the contents from the opening (H), and having a large number of fine holes allowing a part of the contents to pass therethrough. The mesh (52a) comprises an opening having a diameter (D2) of 2.0 to 3.5 times, preferably 2.2 to 3.2 times, the diameter (D1) of the jet ring at the in-side opening.

The present invention provides a laterally arranged waterproof power supply structure of a power adjustment device, which comprises a power supply circuit board connected with a potentiometer, a cylindrical insulating sheet sleeved onto the outside of the power supply circuit board, a power supply housing sleeved onto the outside of the cylindrical insulating sheet, a first side cover and a second side cover. The first side cover and the second side cover are located on both sides of the power supply housing. A waterproof gasket is attached to the periphery of the inner side of the first side cover to form a cavity structure, so that the positive pressure and the negative pressure generated inside the power supply due to thermal expansion can be effectively eliminated. Therefore, the internal pressure and the external pressure of the power supply are balanced. The water and the air are prevented from entering the power supply, so that the waterproof purpose is achieved. The inner side of the first side cover is provided with a potentiometer fixing seat and a grounding seat. One end of the potentiometer fixing seat, located on the outer side of the first side cover, is designed as a tapping end and is used for sealing the outer side of the first side cover. According to the technical scheme of the invention, the power of the power supply can be adjusted through opening a screw and a sealing ring arranged on the tapping end, and rotating a cross-shaped groove of the potentiometer. In this way, the power adjustment of the power supply is convenient. Meanwhile, the power supply is simple in assembly and good in waterproof performance.

The invention relates to an automobile clutch master cylinder which comprises a cylinder body and a piston arranged in the cylinder body. A sealing ring is arranged on the piston and divides an inner cavity of the cylinder body into a front chamber and a rear chamber. The front end of the piston is connected with one end of a push rod. The other end of the push rod extends away from the cylinder body in the axial direction of the cylinder body and is hinged to a clutch pedal arm. The rear end of the rear chamber of the cylinder body is provided with an oil outlet pipe. An oil inlet pipe is communicated into the front chamber of the cylinder body from a through hole formed in the pipe wall of the cylinder body. A path for communicating the front chamber with the rear chamber is formed in the piston. A one-way valve is arranged on the path. In the communicating direction of the one-way valve, oil is supplied from the front chamber to the rear chamber of the cylinder body. When negative pressure exists in the rear chamber of the cylinder body, oil in the front chamber passes through the path and the one-way valve to enter the rear chamber, so that the negative pressure in the rear chamber is eliminated, the return stroke resistance of a pedal is reduced, and driving discomfortableness of a driver is eliminated.

A buffer vessel and a vapor tube in a track tool are configured as a diffusion vaporizer to deliver a flow of photolithography chemical vapor to a chamber for coating a wafer. Pressure in the buffer vessel is equalized to eliminate negative pressure in the buffer vessel. The size of the buffer vessel is selected such that a volume of photolithography chemical vapor that is sufficient to coat an entire lot of wafers is provided to the chamber when there is no longer any photolithography chemical in a source bottle.

The invention relates to a production method of slow-rebound sponge. The provided production method should effectively solve the petrification phenomenon of the sponge block. The method has the characteristics of simple and easy operation and low cost, thereby improving the product quality and production efficiency and reducing the product cost. The production method of slow-rebound sponge comprises the following steps of: 1) forming a container-shaped mould by enclosing a plurality of baffles; 2) pouring a material mixed by various ingredients into the mould; 3) removing the baffles after the material is foamed into the sponge block and then moving the sponge block to an open field; 4) striking or kneading each part on the surface of the sponge block so as to open up open cells in the tiny tissues in the sponge block, wherein the striking is stick striking by manpower or beating by a vibrating machine and the kneading is an action of lightly pressing the sponge block by a press for several times until the sponge block deforms at least 30% or treading the top surface of the sponge block by manpower.

The invention discloses a gas injection device for an automobile. The gas injection device comprises a gas inlet pipe and a hollow pipe, wherein a groove of which the section is a major arc is formed in the inner wall of the hollow pipe; injection holes are just opposite to the arc bottom of the groove; a plurality of electric heating tubes are arranged in the groove; a guide block is arranged at the bottoms of the electric heating tubes; a guide groove matched with the guide block is formed in the bottom of the groove; each electric heating tube comprises a tube body, an insulated material filling the inside of the tube body and an electric heating wire arranged inside the tube body; a binding post is connected to the tail end of each electric heating wire, penetrates through a small hole and is connected with a wiring plug board; a heat conducting board covers the opening end of the groove. The plurality of electric heating tubes are arranged in the arc groove; the side end of the groove is sealed by the wiring plug board, so that the heat dissipation can be reduced; meanwhile, the electric hating tubes are favorably taken and placed, i.e., a user can determine the number of the electric heating tubes in real time according to the supply amount of gas, so that stable operation for gas output flow is finished at the minimum heating cost.

The invention provides a technical scheme of a towerless water supply tank, which includes a bracket, and a tank body is installed above the bracket. One side is the water inlet pipe, and the other side is the water outlet pipe. The safety valve at the bottom of the tank is installed horizontally on the tee, the lower end of the tee is connected to the negative pressure valve, and the upper end of the tee is connected to the bottom of the tank. The bottom of the tank can also be installed in other parts. When the automatic water supply system fails and the pressure exceeds the set pressure, the safety valve will open and release the pressure automatically. When there is negative pressure, the negative pressure valve is opened to supply air to ensure that the tower-free water supply tank is not damaged.