87results about "Floats for valve actuation" patented technology

The utility model discloses a vertical automatic exhaust valve, and mainly relates to the field of exhaust valves. Comprising a valve body, the bottom of the valve body is communicated with a pipeline, a valve cover is arranged on the valve body, a valve bonnet is arranged at the top of the valve cover, a floating ball is movably arranged in a cavity of the valve body, a T-shaped valve element is arranged in the valve bonnet in a sliding mode, the top of the valve element can block the valve cover, the bottom of the valve element is connected with the floating ball, and an exhaust hole is formed in one side of the valve bonnet. The exhaust valve has the advantages of being free of complex structures and small parts, not prone to being blocked and rusted, capable of achieving rapid exhaust and rapid air suction, not prone to being blocked, good in sealing effect, capable of avoiding the phenomenon of water leakage and more convenient and practical, and the exhaust valve only exhausts air and does not drain water after the valve element is blocked.

A valve device includes: a housing including a peripheral wall, a bottom wall, and a partition wall; and a float valve accommodated in a valve chamber to be able to ascend and descend, thereby opening and closing an opening portion. A slit extends continuously over the peripheral wall and the bottom wall, and a deflectable and deformable elastic piece is formed via the slit. The elastic piece has a free end on the bottom wall, and the free end is provided with a float valve support portion configured to support the float valve.

The invention is suitable for the technical field of cleaning. The invention discloses a water tank device with balanced internal and external pressure, which comprises a water tank body provided with a storage cavity for storing liquid, a water inlet and outlet mechanism arranged on the water tank body and communicated with the storage cavity after the water tank body is pressed, and a pressure relief mechanism capable of keeping the pressure of the water tank balanced, and the pressure relief mechanism comprises a pressure relief pipe connected with the water inlet and outlet mechanism; a buoyancy component capable of adjusting air pressure in the water tank body is arranged at the free end of the pressure relief pipe, and the pressure relief pipe is provided with a flexible structure between the water outlet pipe and the buoyancy component. Due to the fact that the pressure relief mechanism can keep the air part in the water tank communicated with the outside through the water inlet and outlet mechanism, when pressure occurs in the water tank in the cleaning process, air and clear water can be conveyed out of the water tank together, the internal pressure of the water tank is effectively reduced, the internal pressure and the external pressure of the water tank are balanced, and the pressure rise phenomenon generated in the water tank is avoided.

The invention relates to an automatic exhaust valve of a circulating cooling water system of a power plant. A horn mouth structure is formed on the inner side of an exhaust port of a valve body; the sleeve is arranged in the valve body and forms an exhaust channel with the inner wall of the valve body; the solid floating body is in vertical sliding fit in the sleeve; the hollow rubber ball is connected with the upper surface of the solid floating body through a first pull rope; when the valve body is filled with water, the hollow rubber ball and the solid floating body float upwards, so that the hollow rubber ball blocks the exhaust port and further presses the hollow rubber ball upwards under the action of buoyancy of the solid floating body, and water leakage caused by untight sealing of the exhaust port is prevented. When no water exists in the valve body, the hollow rubber ball and the solid floating body lose buoyancy and fall back naturally. The weight of the solid floating body can ensure that certain resistance can be overcome in the process, and the hollow rubber ball is pulled down through the first pull rope to prevent the hollow rubber ball from being clamped at the exhaust port and cannot fall back.

A refrigerator includes: a body including a storage compartment; a door that opens or closes the storage compartment and includes a dispenser; a water tank case disposed in the door; a water tank separably mounted in the water tank case; a water level sensor configured to sense a water level inside the water tank when the water tank is mounted in the water tank case; and a water tank valve configured to guide water supplied from a water supply source to the dispenser or the water tank, and to prevent water from being supplied to the water tank when the water level sensor senses that a certain amount of water is stored in the water tank.

The invention provides an exhaust valve assembly of a baby feeding bottle, and relates to the technical field of feeding bottle exhaust valves, the exhaust valve assembly comprises shells, a mounting block, an air inlet pipe and an exhaust mechanism, one end of each shell is provided with an air inlet hole, the end, away from the air inlet hole, of each shell is used for being assembled with a feeding bottle body through the mounting block, and the multiple shells are uniformly arranged on the side wall of the feeding bottle body; the air inlet pipe is arranged in the center inside the shell. During exhausting, redundant gas enters the gas inlet pipe through the gas inlet hole, penetrates through the sleeve communicated with the gas inlet pipe and enters the floating hopper from the lower portion of the floating hopper, in the state, the gas pushes the buoy upwards to eject the buoy open, a gap is reserved between the buoy and the floating hopper, and the gas penetrates through the gap and the sealing plate and is exhausted from the exhaust pipe; the gas exhausted from the exhaust pipe is exhausted out of the feeding bottle body through the outer pipe, the liquid is filled in the shell, and the height of the liquid can keep the floating bucket to float on the liquid level all the time, so that the gas can be exhausted normally when a baby uses the feeding bottle body or the feeding bottle body is horizontally and statically placed.

The utility model provides a vacuum breaking water stop valve. The vacuum breaking water stop valve comprises a valve body and a partition plate. The partition plate divides the internal space of the valve body into an air outlet channel and an air inlet channel, an outlet of the air outlet channel is located on one side of the bottom of the valve body, and an inlet of the air inlet channel is located on the other side of the top of the valve body. A connecting channel opening for communicating the air inlet channel with the air outlet channel is formed in the partition plate; a water return hole is formed in one side, close to the bottom of the valve body, of the partition plate; a floater is arranged below the connecting channel opening, and a connecting rod penetrating through the connecting channel opening is arranged above the floater; a vacuum breaking chamber is arranged at the top of the valve body, a vent hole is formed in a shell of the vacuum breaking chamber, and a connecting rod inlet and a sealing module for sealing the connecting rod inlet are arranged at the bottom of the vacuum breaking chamber; the upper end of the connecting rod penetrates through the connecting rod inlet and is fixedly connected with the sealing module. In the using process, vacuum breaking and water stopping can be automatically and rapidly achieved, water or other liquid is effectively prevented from damaging the liquid ring pump, and therefore the reliability of vacuum water diversion equipment is improved, and the service life of the vacuum water diversion equipment is prolonged.

The following abstract of the invention describes a thermodynamic valve for retaining vapours and gases and relieving pressure and vacuum for use in the venting (breathing) of tanks or reservoirs of combustible liquids (fluids), at storage points, in industry or at any other establishment that stores or sells liquid fuels containing volatile compounds, preventing the egress of the volatile vapours and gases to the atmosphere through the tank breathers, comprising two diaphragm rings (3a and 3b) that act through the thermodynamic action of the positive and negative pressures inside the positive (4) and negative (5) chambers, fixed to one another by a screw thread, a cap (2) screwed in the body of the chamber (4) and having upwardly directed lateral openings, a rupture seal (1) fitted in the upper part of the cap (2), containing a base (5.1) with screw thread, fire-break fabric (6) in stainless steel fixed by an O-ring (7) and double safety fire-break fabric (4.1).

Some embodiments include a fluid valve assembly with an outlet base dimensioned to be positioned through a drain in a fluid tank, and a float assembly including a moveable float. The moveable float can form a fluid-tight seal at a first end when the moveable float is coupled to the outlet base, and a flow opening when the moveable float is at least partially decoupled from the outlet base. Some embodiments include a housing positioned with the moveable float, where the housing encloses a suction device coupled to a moveable piston. Some embodiments include an actuable diaphragm positioned in the outlet base, and a compressed air tube or passageway coupled to one side the actuable diaphragm. In some embodiments, the actuable diaphragm is configured and arranged to be actuated by compressed air to move the moveable piston.

The present application discloses a composite exhaust valve, which includes a valve body, a valve cover, a pressure cover, a float cover, a float body, and a guide rod. The valve body is provided with openings at both ends. The valve cover is connected to the top opening of the valve body, and the pressure cover is connected to the top of the valve cover. The valve body includes a receiving portion and a connecting portion. The float cover is disposed in the receiving portion and has a connecting port. The float body is disposed in the float cover. The valve body also includes a partition plate, a rotating rod, and a top plate. The partition plate is horizontally connected to the inner ring wall of the connecting portion and has a plurality of vent holes. The rotating rod vertically passes through the float cover and is slidably connected thereto. The top plate is disposed in the float cover and is connected to the float. An abutment block is connected to the edge of the top plate. A stopper arc block corresponding to the position of the stopper arc block is connected to the inner wall of the float cover. The stopper arc block is in contact with the bottom surface of the stopper arc block. The present application has the effect of extending the service life of the exhaust valve.

The invention relates to an exhaust valve which comprises an air valve shell and an exhaust cover matched with the air valve shell, and is characterized in that an exhaust hole is formed in the exhaust cover, the exhaust valve further comprises a valve cover arranged on the upper side of the exhaust cover, an exhaust hole communicated with an exhaust port of the exhaust cover is formed in the valve cover, the valve cover further comprises a wrapping cavity, and the wrapping cavity is communicated with the exhaust port of the exhaust cover. A valve rod and an exhaust nozzle are arranged in the wrapping cavity, the valve rod is in sealing fit with the wrapping cavity and can move in the wrapping cavity, the exhaust hole is opened when the valve rod moves to the position away from the exhaust hole, and the exhaust hole is closed when the valve rod blocks the exhaust port. The position of the valve rod can be adjusted by rotating the screw. According to the novel exhaust valve, the valve rod is of a double-sealing structure, and the sealing performance is good; by adjusting the position of the valve rod, lateral exhaust of the exhaust valve can be achieved, and the problem of exhaust water leakage is solved.

The invention relates to the technical field of oil tank exhaust valves, in particular to a zero-leakage oil tank valve. Comprising an inner shell and an outer shell sleeving the outer side of the inner shell; the opening of the inner shell and the opening of the outer shell are oppositely inserted; an exhaust hole penetrates through the upper end of the inner shell; the outer diameter of the inner shell is smaller than the inner diameter of the outer shell; an inner vent hole is formed in the lower position of the outer wall of the inner shell in a penetrating manner; an upper vent hole is formed in the top of the inner shell in a penetrating manner; an outer vent hole is formed in the upper position of the outer wall of the shell in a penetrating manner; a lower air hole penetrates through the center of the bottom of the shell; according to the oil tank valve, the gas-permeable membrane which can permeate oil gas and intercept oil is arranged on the inner side of the exhaust hole of the oil tank valve, and the floater and the first spring are matched, so that the purpose of zero leakage of the oil in an oil tank is achieved, and the application effect of the oil tank valve is improved.

The present invention proposes a time-controlled waterway switching device, comprising a valve body, a water inlet passage, waterway A, waterway B, and a float. A float is disposed within the float chamber of the valve body. A water inlet passage is disposed on one side of the valve body, communicating with the float chamber. Waterway B is disposed at the bottom of the valve body. Valve seats A and B are disposed above and below the valve body, respectively. When water flows into the water inlet passage, water pressure presses the float against valve seat B, causing water to flow out of waterway A. When water flow stops, the float rises, sealing valve seat A, causing water to flow out of waterway B, and the float chamber slowly drains water. When the float is above the water inlet of the water inlet passage, water flows into the water inlet passage, presses the float against valve seat A, causing water to flow out of waterway B. When water flow stops, the float sinks as the liquid level in the float chamber drops, causing water to flow out of waterway B. This waterway switching device can achieve time-sequential control of two water outlets by one electrically controlled solenoid valve.

The present invention relates to the technical field of water inlet valves. Disclosed is a single-float barrel water inlet valve. A water inlet channel and a water outlet channel of the water inlet valve are connected or disconnected by means of a valve. A single-float barrel is configured to control the valve and has a groove into which water is injected and a buoyancy chamber. The water outlet channel is provided with a flow guide component. The flow guide component is provided with a water receiving cavity. The water receiving cavity is configured to receive water from the water outlet channel. A water outlet hole is provided at the bottom of the water receiving cavity. A water guide plate covering the water outlet hole is provided above the water outlet hole and is configured to guide water entering the water receiving cavity to flow between the water guide plate and the side wall of the water receiving cavity. A water passage gap is provided between the water guide plate and the water outlet hole, such that water flows through the water passage gap and the water outlet hole in sequence and flows into a water tank. The water receiving cavity is further provided with a flow guide channel configured to guide out part of a water flow in the water receiving cavity to fall into the groove, so as to provide an additional counterweight for the single-float barrel. The present invention prevents the water level in the water tank from being unstable under different water pressures.

The oil circulation arrangement includes a lower oil inlet portion, a filter unit (10) of a vehicle transmission filter, and an outlet (5) located higher than the inlet portion for immersion in the oil in the crankcase. The arrangement includes one or more valves (1) integrated into the inlet portion, each selectively allowing a flow of crude oil (F) when a float (2) provided in the valve is raised, releasing at least one shutter (21) movable according to the float's position. Access to the filter unit in the valve is thus opened when this float (2) is subjected to the buoyant force (Arch). A return element (20) is coupled to the access closure means, including the shutter, and prevents air from entering through this access, which, by the return effect without sufficient opposing buoyant force (Arch), remains closed. Figure from the summary: Figure 1

Apparatuses, methods, and systems are disclosed for techniques for fluid control. An apparatus includes a valve configured to control a flow of fluid into a tank, a float operatively connected to the valve and configured to actuate the valve based on fluid level within a container, and an activation lever configured to alter interaction with the float.

The utility model provides a drainer. The drainer comprises a water inlet and a water outlet, comprising a shell which is provided with a water inlet cavity, a pressure cavity and a first channel; the sealing element is movably arranged in the pressure cavity, and an inclined angle is formed between the moving direction of the sealing element and the axis of the first channel; the pressure relief mechanism is used for controlling the pressure state of the pressure cavity; when the pressure cavity is in the first state, the pressure in the pressure cavity is larger than that of the water inlet cavity and drives the sealing piece to block the first channel, and when the second pressure cavity is in the second state and the pressure of the pressure cavity is smaller than that of the water inlet cavity, liquid in the water inlet cavity jacks up the sealing piece, so that the water inlet cavity is communicated with the first channel. And liquid in the water inlet cavity is discharged to the water outlet through the first channel. The utility model has the beneficial effects that the pressure cavity is adjusted through the pressure relief mechanism, so that the pressure in the pressure cavity is greater than or less than the pressure of the water inlet cavity, and the sealing element moves through the pressure difference, so as to open or close the drainage.

To improve joint strength due to welding of a float and a mounting member.SOLUTION: A float coupling structure comprises: a hollow float 45; a mounting member 50 that has a base 51 provided on the outside of the float 45 and having a contact surface 51a that contacts an external surface 45c of the float 45 and is used to be coupled to a lever 46, and a plurality of protrusion parts 53 protruding from the contact surface 51a and penetrating the float 45; a first welding part 61 that welds the base 51 to the external surface 45c of the float 45; and a plurality of second welding parts 62 that weld each of the plurality of protrusion part 53 to an internal surface 45d of the float 45.SELECTED DRAWING: Figure 3

The utility model relates to the technical field of valves, in particular to an exhaust valve capable of preventing exhaust air blockage, which comprises a valve body, a valve cover, an air guide shunting cover, a buoy and a sealing floating ball, a valve body water inlet is arranged at the bottom of the valve body, an exhaust port is arranged at the top of the valve body, the valve cover is fixedly arranged at the exhaust port of the valve body, and the air guide shunting cover is arranged in the valve body. A plurality of air guide grooves are formed in the outer wall of the air guide shunting cover, an air guide shunting cover water inlet is formed in the bottom of the air guide shunting cover, a guide sleeve is arranged at the air guide shunting cover water inlet, the floating cylinder is arranged in the air guide shunting cover, the sealing floating ball is arranged in the floating cylinder and matched with the inner wall of the floating cylinder, and a floating ball guide rod is fixedly arranged at the bottom of the sealing floating ball and extends into the guide sleeve. According to the exhaust valve, the air blocking phenomenon of the exhaust valve can be eliminated, and meanwhile the water sealing effect of the exhaust valve is balanced.

The utility model discloses an automatic exhaust and flow-keeping water delivery pipeline which comprises a water delivery pipeline body, exhaust mechanisms and anchor blocks, and the exhaust mechanisms and the anchor blocks are arranged in a one-to-one correspondence mode. The exhaust mechanism comprises a gas collecting pipe and a return pipe which are communicated at different positions of the water conveying pipeline, the gas collecting pipe and the return pipe are converged in a gas collecting cavity, the top of the gas collecting cavity is communicated with an exhaust pipe, an anti-overflow device is arranged on the exhaust pipe, and the upper end of the exhaust pipe penetrates out of the upper surface of the anchor block and is bent back downwards to form an inverted U-shaped structure; a floating ball is filled in the gas collecting cavity, the top outline of the gas collecting cavity is hemispherical, the radius of the hemisphere is equal to that of the floating ball, and the inner surface of the gas collecting cavity is coated with a rubber water stopping layer. The exhaust efficiency and reliability of the water conveying pipeline can be improved, the water conveying flow is guaranteed, the exhaust mechanism is combined with the anchor block, and the construction cost is reduced.

Provided is a valve device that suppresses the impact sound when a float valve descends and that does not easily lift the float valve. The valve device (10) has a housing (15) having a peripheral wall (55), a bottom wall (53), and a partition wall (21), and a float valve (80, 85) housed in the valve chamber in a manner that is capable of ascending and descending, which opens and closes an opening portion, a slit (60) that extends continuously on the peripheral wall (55) and the bottom wall (53), an elastic piece (66) that is capable of flexibly deforming formed via the slit (60), and a free end portion of the elastic piece (66) on the bottom wall (53) side, on which a float valve support portion that supports the float valve (85) is provided.

The invention relates to the technical field of aviation fuel systems, and discloses a light high-pressure-resistant transfer control float valve which is characterized in that a cavity is axially formed in a shell assembly, a medium inlet is formed in the left side of the cavity, a medium outlet is formed in the right side of the cavity, a valve is arranged in the middle section of the cavity and can move left and right in the cavity, and a cover is fixedly arranged on the end face of the right side of the cavity; the valve and the cover are both of a structure with through holes in the middle, the guide rod is inserted between the through holes of the valve and the cover, the guide rod is provided with a limiting boss on the left side of the valve and provided with a conical boss on the right side of the cover, the right end of the through hole of the cover is a sealing slope matched with the conical boss, and a large spring is arranged outside the guide rod in the radial direction and between the valve and the cover. The right end of the guide rod is connected with the floater assembly which is arranged in the medium box, and the density of the floater assembly is lower than that of the medium. Under the condition that the floater is submerged, when the pressure in the oil conveying pipeline is large, the sealing function can be achieved.

The utility model discloses a floating ball valve capable of adjusting the water level, and relates to a pipeline valve which is applied to a water tank and used for assisting water inlet in the water tank, and the floating ball valve structurally comprises a valve, a pull rod, a floating ball and the like, and is mainly characterized in that a valve rod for opening and closing the valve is connected with one end of the pull rod; a length-adjustable pull rope is arranged between the other end of the pull rod and the floating ball to form flexible connection; therefore, the floating ball can drive the pull rod and control the valve rod to open and close the valve at the set highest water level and the set lowest water level through the pull rope with the adjustable length, particularly, the pull rope is in flexible connection, the valve cannot be opened and closed once the floating ball does not reach the highest water level or the lowest water level, and frequent opening and closing times of the valve are reduced. Impact damage to a pipe network system caused by a water hammer effect generated by frequent starting of the water pump is reduced, the service life of the water level floating ball valve is prolonged, and use energy consumption is reduced; meanwhile, the water level in the water tank can be flexibly adjusted to a proper highest water level and a proper lowest water level for water discharging and water feeding, and the use reliability is also ensured.

An overfill prevention valve for use with a tank includes a valve element disposed in a fluid fill path and a float assembly including an actuator and a repositionable float. The float is selectively fixed relative to and moveable relative to the actuator to adjust a target fill level. The float is buoyantly supported by the fluid such that the float and the actuator are shiftable in correspondence with an actual fill level. The actuator is coupled with the valve element such that the valve element shifts to a closed position when the actual fill level nears a target fill level. The float includes discrete buoyant components that are shiftable away from each other and from the actuator to facilitate shifting of the float relative to the actuator and that are securable relative to each other and relative to the actuator to facilitate operation of the float assembly.

The utility model provides a drainer, which comprises a shell, a water inlet channel, a drainage channel, a water outlet channel, a water outlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe, the drainage mechanism comprises a floating ball and a flexible plugging strip; one end of the plugging strip is fixed in the water inlet cavity, and the floating ball is fixed at the other end of the plugging strip; the drainage channel is positioned below the plugging strip; in a first state, the blocking strip is pressed down along with the gravity of the floating ball to block the drainage channel; and in the second state, the floating ball enables the plugging piece to swing or move upwards under the action of buoyancy so as to open the drainage channel. The drainage device has the advantages that the drainage channel is plugged through the flexible plugging strip, drainage can be achieved by small-amplitude swinging or upward floating of the floating ball, the internal space of the drainage device can be better utilized, and the drainage device is made smaller and more convenient to use.

The utility model discloses a gas collecting and deslagging visual automatic water discharging device, and relates to the technical field of pipeline treatment, in particular to a gas collecting and deslagging visual automatic water discharging device which comprises a water collecting tank, an internal thread sleeve is fixedly installed at the bottom of the water collecting tank, and an external thread sleeve is connected to the lower portion of the internal thread sleeve through threads. A drain valve is installed on the side, close to the bottom face, of the water collecting tank, a filter plate is fixedly installed inside the water collecting tank close to the drain valve, and a maintenance opening is formed in the side, close to the upper surface of the filter plate, of the water collecting tank. According to the gas-collecting and slag-discharging visual automatic water discharging device, the input pipe and the lower inclined baffle are arranged in a matched mode, so that the gas-water separation efficiency is improved, the floater assembly, the magnetic ring and the positive and negative pressure adjusting device are arranged in a matched mode, and therefore the gas-collecting and slag-discharging visual automatic water discharging device has the effect of preventing gas from leaking from the water discharging valve; and through the cooperative arrangement of the internal thread sleeve and the external thread sleeve, the gas collection and slag discharge visual automatic water drainage device has the effect that the installation height is convenient to adjust.

A double-wall high-performance refueling limit valve and its working method, including a shell, a float assembly, and a bottom cover, wherein the shell is sleeved on the outside of the float assembly, and the bottom cover is installed at the bottom of the shell and contacts the bottom of the float assembly through a spring; the float assembly includes a float shell, a sealing door, and a float, wherein the sealing door is assembled on the upper part of the float and is placed inside the float shell together with the float, and the spring is installed between the bottom of the float and the bottom cover, and the float can move up and down in the float shell; a secondary opening vent is provided at the center of the upper end surface of the float shell. The double-wall high-performance refueling limit valve and its working method of the present invention realize rapid opening and pressure reduction under high pressure conditions through a two-stage opening mode of the valve, thereby improving the safety of the fuel tank and vehicle system; a double-wall structure is adopted to realize zero dynamic leakage of liquid under dynamic conditions; modular design realizes different closing heights to meet diverse needs.

The invention is an apparatus for controlling the flow of a fluid, preferably water, to a body of water, such as a swimming pool or a pond. The apparatus includes a valve assembly which is configured to be mounted to a hollow shell. The exterior of the shell is decorated to represent a natural feature of the environment, for example, an aquatic animal. The underside of the shell is configured with a cavity, a portion of which is defined by at least part of the mounting portion of the valve assembly. The mounting portion includes a fitting to receive a hose supplying water to the valve assembly.

An automatic vent valve for a cooling water circulation system of a power plant, comprising: a valve body (1) on the top of which a vent opening is provided, the inner side of the vent opening having a funnel-shaped structure; a sleeve (2) arranged inside the valve body (1) and forming a vent channel with the inner wall of the valve body (1); a solid floating body (3) which is fitted to slide vertically in the sleeve (2); a hollow rubber ball (5) arranged above the solid floating body (3) and connected to the upper surface of the solid floating body (3) via a first traction cable (4).

The utility model provides an automatic control mechanism for pneumatically conveying liquid, which comprises a cover disc used for being connected with an equipment tank body in a matching way; the connecting rod mechanical arm is connected with the cover disc through a fixing bolt, and a floating ball upper limit device is installed at the bottom end of the connecting rod mechanical arm; the short shaft is installed at the bottom end of the connecting rod mechanical arm, a spring rocker arm is installed on the surface of the short shaft, a long shaft is arranged on one side of the spring rocker arm, and the long shaft is connected with a spring connecting shaft through a high-temperature spring; the bottom end of the power guide rod is connected with the spring connecting shaft, and the top end of the power guide rod is connected with a power guide rod guide hole plate; the top of the power guide rod guide hole plate is provided with the air inlet and exhaust valve rod adjusting plate, and the surface of the air inlet and exhaust valve rod adjusting plate is provided with an air inlet valve rod and an exhaust valve rod. According to the automatic control mechanism for pneumatically conveying the liquid, automatic control over the conveyed liquid is facilitated, meanwhile, sealing in the automatic control process is guaranteed, and the use requirement is met.