41results about How to "Short self-priming time" patented technology

The invention belongs to the technical field of a self-priming pump, and particularly relates to an outer ring type efficient start system for the self-priming pump and a start method thereof. The outer ring type efficient start system comprises a main pump which is communicated with a water pool, a pump inlet adjusting valve, a pump outlet adjusting valve, a gas-liquid separation device, a first pressure detecting device, a second pressure detecting device and a third pressure detecting device. All the parts of the invention form a vacuum adjusting system together. The vacuum adjusting system is used to facilitate circular flow of liquid in a circular pipeline outside the pump and enable a water inlet pipeline of the main pump to be in a vacuum state so that gas and liquid can be absorbed into the main pump, the gas absorbed into the main pump is exhausted in the gas-liquid separation device, and eventually the main pump achieves self-priming to complete start process. The outer ring type efficient start system for the self-priming pump and the start method thereof are simple in structure, quick in start, simple in main pump flow channel and convenient to process, flowability of the flow channel is greatly improved, the main pump needs no other auxiliary systems so that loss inside the pump is avoided, and accordingly operation efficiency of the main pump is greatly improved.

The invention discloses a vertical internal and external mixing shaft-seal-free self-sucking pump which comprises a pump body, a pump cover, a pump shaft, a main impellor, a main impellor seal chamber, an assistant impellor chamber, an assistant impellor, a water sucking chamber, a water outlet, a water inlet pipe, a water inlet pipe flange, a volute chamber and a gas-water separation chamber, wherein the top surface of the main impellor and the top surface of the assistant impellor are respectively provided with a radial main impellor balancing rib and a radial assistant impellor balancing rib; the outer edge at the bottom surface of the assistant impellor is fixedly provided with an annular seal pad; and the bottom surface of the assistant impellor chamber is provided with an annular supporting plate. Through the self-sucking pump provided by the invention, the issue of air intake of a shaft seal can be solved, high-vacuum continuous air exhaust can be kept all the time in the self-sucking process, the self-sucking capability is improved, and the self-sucking time is shortened.

The invention discloses a jet self-sucking centrifugal water pump. The pump comprises a pump body, a nozzle, a diffuser, an impeller, an inner pump cover, a guide blade, an outer pump cover, a pump shaft, a bracket and a motor, wherein the motor is directly connected with the bracket; the pump shaft is coaxially connected with the motor; the impeller is arranged at the end of the pump shaft; two sides of the impeller are provided with a centrifugal pump chamber structure through matching of the outer pump cover, the guide blade and the inner pump cover; the opened end of the pump body is connected with the outer pump cover in a sealed mode, so that a centrifugal pump chamber is accommodated in the pump body; axial through holes are uniformly distributed on the end face of the inner pump cover and communicated with a water outlet cavity of the pump body; the diffuser is connected between the inner pump cover and a clapboard in the sealed mode; the end of the diffuser, which is positioned at one end of a water sucking port, is coaxially provided with the nozzle to form a jet pump structure; and the outlet of the diffuser is positioned at the inlet of the impeller. A jet pump and a centrifugal pump are integrated to achieve performance complementation; the jet pump helps the centrifugal pump to self-suck, the self-sucking process is short, and self-sucking capability is high; andthe pump has an integrated structure and is not required to be additionally provided with a self-sucking device, so that matching cost is saved, and the pump is particularly suitable to be used as a marine pump.

The invention relates to an oil-free rotary vane vacuum type self-priming centrifugal pump and a use method thereof. The oil-free rotary vane vacuum type self-priming centrifugal pump comprises a self-priming centrifugal pump body; a gas-liquid separation chamber, a liquid inlet pipe and a liquid discharging pipe are arranged on the self-priming centrifugal pump body; a first one-way valve is arranged on the liquid discharging pipe; a vacuum pump is integrated inside the gas-liquid separation chamber and integrated with the self-priming centrifugal pump body; the vacuum pump is an oil-free rotary vane vacuum pump and is provided with an inlet and an outlet; the inlet is communicated with the liquid inlet pipe through a suction pipeline; the outlet is communicated with the first one-way valve through an exhaust pipeline; a second one-way valve is arranged on the suction pipeline; the exhaust pipeline is provided with a third one-way valve and an electromagnetic valve; the third one-way valve is close to the first one-way valve; a liquid level switch is arranged on the liquid inlet pipe; the height of the liquid level switch on the liquid inlet pipe is lower than that of the suction pipeline; the liquid level switch is electrically connected with the vacuum pump and the electromagnetic valve. The pipeline system is simplified, the self-priming performance of the pump is improved, and the oil-free rotary vane vacuum type self-priming centrifugal pump has the advantages of being compact in structure, high in efficiency, long in service life and the like.

The invention relates to an automatic control type efficient self sucking pump. The automatic control type efficient self sucking pump comprises a pump body, a motor, an automatic exhausting and vacuumizing device and an intelligent control box; a liquid inlet is formed in the bottom of the pump body and is connected to an inlet elbow, a liquid outlet is formed in the side surface of the pump body and is connected to an automatic blowoff valve, an outlet stand pipe is arranged on the top of a valve body of the automatic blowoff valve, and the bottom of the valve body of the automatic blowoff valve is connected to a return pipeline through a return valve; a rotation shaft of the motor is connected to a pump shaft through a coupling, a pump cover is arranged between the pump body and the motor, a cavity formed by the pump body and the pump cover is a pump cavity, and an impeller is arranged inside the pump cavity; the pump cover is provided with an inductive probe and a vacuumizing and exhausting hole, an exhausting pipeline is installed on the vacuumizing and exhausting hole, the automatic exhausting and vacuumizing device communicates with the pump cavity through the exhausting pipeline, and the motor, the inductive probe and the automatic exhausting and vacuumizing device are electrically connected to the intelligent control box through signal cables. The automatic control type efficient self sucking pump is simple and compact in structure, the self sucking function is realized by the automatic exhausting and vacuumizing device, and the hydraulic efficiency is high.

The invention discloses a high-performance strong-corrosion-resistant self-sucking pump. The self-sucking pump comprises a foundation which is fixedly connected with a pump body; the self-sucking pump is characterized in that: a trumpet-shaped suction pipe with a conical hole is arranged in the pump body; a jet flow nozzle is arranged in a pump front cover at the front end of the suction pipe, and a guide wheel and an impeller are arranged at the rear end of the suction pipe in a rotatable way; the rear end of the pump body is provided with a pump cover; the impeller is connected with a drive mechanism through a rotation shaft or in a magnetic transmission mode; the upper wall of the pump body is communicated with a pump body outlet; the jet flow nozzle is fixedly arranged in front of the front mouth of the suction pipe; the jet flow nozzle is communicated with a pressure chamber of the pump body through a channel in the pump body; and a check valve is fixedly arranged in the inlet of the pump body. Due to the creative design of a product, air and liquid separation is performed quickly, the self-sucking time is reduced obviously, the sucking travel is greatly improved, and the problem that a product cannot be conveyed under the working conditions of long sucking travel and high self-sucking frequency of the conventional corrosion-resistant self-sucking pump can be solved completely.

The invention provides a double-outlet multipurpose external mixing type self-priming pump with a quasi-spiral suction chamber. The double-outlet multipurpose external mixing type self-priming pump mainly comprises an inlet flange, a pump body, an impeller, an air-liquid separating pipe, a rear cover, a suspension body part, an outlet flange and a flange cover, wherein the pump body is formed by the quasi-spiral suction chamber, a spiral compression chamber and a liquid storage chamber through integral casting and is provided with double outlets and the like. The hydraulic performance of the pump is effectively improved while the self-priming performance of the self-priming pump is improved, the flow losses of fluid media in a suction chamber and a water compressing chamber are remarkablyreduced, and the double-outlet multipurpose external mixing type self-priming pump has the advantages of being high in efficiency and reliability, compact in structure, convenient to install and maintain and multipurpose, serving as a pipeline self-priming pump accessed horizontally only by slightly adjusting an installing mode and the like, is suitable for the fields of agricultural irrigation and drainage, river and pond breeding, municipal drainage, petrochemical metallurgy and the like and can be installed on a movable pump truck for fire-fighting operation and the like.

A self-priming non-clogging sewage pump comprises a pump block, a rotating shaft, an impeller, a pump cover, and a hanger. The pump block comprises an oil chamber, a volute, a gas-liquid separation chamber, an inflow pipe, a liquid storage chamber and a front cover plate. The pump cover is connected with the left side of the volute. The hanger is fixed to the left end of the pump block. One end of the rotating shaft is connected with the impeller; the other end of the rotating shaft penetrates the pump cover, the oil chamber and the hanger and is connected with a bearing at the left end of the hanger. The impeller is disposed inside the volute. The front cover plate is fixed to the inner wall of the volute through bolts. The right side of the lower end of the volute is provided with a reflow hole which is communicated with the liquid storage chamber through a one-way inflow valve. An outlet in the upper end of the volute is arranged in the gas-liquid separation chamber. The self-priming non-clogging sewage pump is simple in structure, low in production cost and convenient to popularize; clogging can be avoided effectively; maintenance costs are lowered; the service life of the pump is prolonged. The self-priming non-clogging sewage pump has high self-priming capacity, self-priming time is shortened and operating efficiency is improved.

The invention discloses a new structure of self-priming centrifugal pump. The structure of a pressurized-water chamber of a single-stage self-priming centrifugal pump is designed into a ring shape; the outlet of an impeller is provided with a guide vane in an adding manner; the radial direction of the guide vane outlet is a closed runner which forms a liquid runner with return guide vane at the back of guide vane; a radial cover and a return guide vane cover are arranged in an adding manner; the liquid flow into the center of the pressurized-water chamber; as the pressurized-water chamber haslarge area, which reduces impact loss of the pump, improves efficiency of the pump, reduces velocity circulation of the pump, quickens mixing and separating speed of gas and liquid in the pump and improves the self-priming time of the pump; the guide vane and a spiral case of the combined type pressurized-water chamber of the guide vane and the spiral case can be respectively cast and processed, and aluminium alloy pressure casting and nonmetallic material manufacture and other new processes can be adopted. The technology not only has good process property, light weight and convenient operation, but also reduces the radial force of the pump, lowers the noise, improves the reliability and provides powerful technical support for the light development.

The invention relates to a portable fire pump comprising a petrol engine (1) and a pump body (2), wherein the pump body (2) comprises a sealing base (4), a pump shell (3), a main shaft (5), three-level centrifugal impellers and two-level guide blades, wherein the sealing base (4) is connected with the petrol engine (1); the pump shell (3) is fixedly connected with the sealing base (4); the main shaft (5) is arranged in the center of the pump shell (3); the three-level centrifugal impellers are sequentially fixed with the main shaft (5); the two-level guide blades are sequentially fixed in the pump shell (3); the main shaft (5) is coaxially connected with an output shaft of the petrol engine (1); and the sealing base (4) is internally provided with a sealing device (6). The invention solves the technical problems of large size, heavy weight, high energy consumption and easy damage of the traditional fire pump, has the advantages of small size, light weight, portability, low energy consumption and technical effect of the portable fire pump which can automatically close the petrol engine (1) under the condition of an insufficient water source.

The invention discloses a gas-liquid separation device for enhancing self-absorption of a self-absorption type multistage centrifugal pump. The gas-liquid separation device is arranged inside a self-absorption centrifugal pump and mainly comprises two parts, namely an annular bracket and an annular spiral channel which is arranged close to the annular bracket, and the surface of the spiral channelis uniformly coated with a hydrophobic material to form the hydrophobic surface annular spiral pipe channel supported by the annular bracket. The gas-liquid separation device is installed between a cavity of a pump shell and the pump shell, an inner ring and an outer ring of the device are tightly attached to the cavity and the pump shell respectively, fan-shaped openings are formed in the bottomand the top of the gas-liquid separation device, the opening at the top is an exhaust port, and the opening at the bottom is a water return port. The gas-liquid separation device is installed in an area near a pump outlet, the exhaust port of the gas-liquid separation device is directly opposite to the pump outlet, and the water return port is located in the bottom of the pump. The annular gas-liquid separation device is simple in structure, convenient to install, low in machining difficulty, light in mass, easy in raw material obtaining and wide in application prospect.

The self priming pump of fluoroplastic alloy lined steel for pumps mainly includes one impeller, one pump shaft, one back cover and one pump body. The pump body is assembled with one suction chamber, one volute, and one extruding chamber connected tightly. The assembled pump body has the suction chamber, the volute, and the extruding chamber molded and fluoroplastic lined separately, and thus has raised anticorrosion performance. At the same time, the assembled structure can also optimize the inside structure, and shorten the air-liquid separating time and the self priming time.

The invention relates to a low-loss efficient self-suction type centrifugal pump. The centrifugal pump comprises a pumping chamber, a cross section of the pumping chamber is in a shape of a '6 ' in whole, an outer side edge line is composed of a spiral line A, a curve B and a line C, the line C is connected with the spiral line A and the curve B at the same time and is an intersecting line of theoutlet surface and the cross section of the pumping chamber, an inner edge line is a circle D, a point X is arranged on the line segment, opposite to the curve B, in the spiral line A, meanwhile, thepumping chamber is divided into a strip-shaped T1 section and a ring-shaped T2 section which are in smooth transition connection through a flow passage cross section passing the point X and the intersection point Y, a point S is arranged at the position, close to the point X, on the spiral line A in the T2 section, the flow passage cross sections intersected with the spiral line between the pointY and the point S are coplanar with a circle center E, are in an isosceles trapezoid-like shape, and are gradually increased in area, the area, passing the point S, of the flow passage cross sectionsis the largest, and the hydraulic efficiency of the low-loss efficient self-suction type centrifugal pump is 88% to 97%. According to the pump, full-flow-way hydraulic design is adopted, efficiency, the self-suction performance, the hydraulic performance and the running reliability are balanced, and the application prospect is good.

The invention discloses a self-absorption centrifugal pump with a water return hole capable of being closed automatically. According to the self-absorption centrifugal pump, a coaxial water return hole automatically-closing device is arranged right in front of the water return hole of the pump. The self-absorption centrifugal pump is mainly composed of a cylinder sleeve and a piston moving in the cylinder sleeve. When self-absorption is started by the pump, the piston resets under action of a compression spring; the water return hole is opened, and self-absorption water conveying is conducted; once the self-absorption process is completed, pressure water generated at an outlet of the pump enters a rear cavity of the piston through a pipe; and the piston is driven to advance to block the water return hole, and leakage is eliminated. The self-absorption centrifugal pump has the positive effects that self-absorption time of the pump is shortened; no leakage can be generated; volume losses are reduced; and efficiency of the pump is improved. To prevent the pressure water from damaging the structure, the piston drives a round bar to block the water return hole through the compression spring instead of direct blocking, and therefore if impurities such as sand grains are contained at a conical opening of the water return hole, the situation that leakproofness is lost due to damage of the conical opening can be avoided as a result of protection of the compression spring; and reliable and normal operation of the pump is guaranteed.

The invention discloses a steam-water separator of an efficient energy-saving seal-free automatic control self-sucking pump, belongs to the technical field of pumps, and in particular relates to a steam-water separator of a pump which comprises a flange and baffle plates, wherein the lower part of the flange is connected with a linking drum, and a plurality of baffle plates are uniformly distributed on a linking pipe; and the baffle plates are passageway type cambered blades. The steam-water separator of the efficient energy-saving seal-free automatic control self-sucking pump provided by the invention is applied on a seal-free automatic control self-sucking pump, the steam corrosion is lowered, the flow rate is accelerated, the water power loss is reduced, the self-sucking time of the water pump is shortened, and the efficiency of the water pump is improved.

The invention discloses a self-sucking blocking-free sewage pump. The sewage pump comprises an inlet connecting pipe, an outlet connecting pipe, a bent pipe, a pump body, an impeller and a pump shaft, wherein an outlet of the inlet connecting pipe is connected with an inlet of the bent pipe, an outlet of the bent pipe is connected with the pump body, the impeller is connected with one end of the pump shaft, and a mechanical seal is arranged between the pump shaft and the pump body; a liquid storing cavity and a working cavity are formed in the pump body, a water inlet valve is arranged at the top end of the liquid storing cavity, a gas-liquid separating pipe is arranged on one side, close to the outlet connecting pipe, of the outer wall of the pump body, and the gas-liquid separating pipe is communicated with the working cavity of the pump body. By the adoption of the technical scheme, the self-sucking blocking-free sewage pump is compact in overall structure, small in size and noise, remarkable in energy-saving effect and convenient to overhaul, the self-sucking sewage pump can work once in water, and engineering cost is greatly reduced.

The invention discloses a vertical anti-freezing self-priming piston pump. The vertical anti-freezing self-priming piston pump comprises a bracket, and an outer bracket positioned at the upper part of the bracket and formed integrally with a synchromesh gear case through casting. A reduction gearbox bearing base, a reduction gearbox cover, a motor bracket and an explosion-proof motor are arranged at the upper part of the synchromesh gear case in sequence. The vertical anti-freezing self-priming piston pump is characterized in that an upper sealing plate is arranged at the upper end of a cavity while a lower sealing plate is arranged at the lower end of the cavity; synchronous pistons are arranged between the upper sealing plate and the lower sealing plate; the two synchronous pistons are engaged with each other and rotate and the outer diameters of the pistons are in interference fit with the cavity; convex edges of upper and lower end surfaces are respectively in interference fit with the upper sealing plate and the lower sealing plate; an upper machine dynamic sealing ring, an upper machine static sealing ring, a lower machine dynamic sealing ring and a lower machine static sealing ring for sealing an auxiliary transmission shaft and a synchronous shaft are arranged at the upper parts and the lower parts of the synchronous pistons; and an electric heating water circulating device is disposed in an explosion-proof box at the upper part of a rear separated chamber of the cavity. The vertical anti-freezing self-priming piston pump has the advantages of small size, compact structure, good sealing performance and strong self-priming capacity, and effectively solves problems in freezing prevention and thermal insulation of a pump body.

The invention relates to an oil-free rotary vane vacuum type self-priming centrifugal pump and a use method thereof. The oil-free rotary vane vacuum type self-priming centrifugal pump comprises a self-priming centrifugal pump body; a gas-liquid separation chamber, a liquid inlet pipe and a liquid discharging pipe are arranged on the self-priming centrifugal pump body; a first one-way valve is arranged on the liquid discharging pipe; a vacuum pump is integrated inside the gas-liquid separation chamber and integrated with the self-priming centrifugal pump body; the vacuum pump is an oil-free rotary vane vacuum pump and is provided with an inlet and an outlet; the inlet is communicated with the liquid inlet pipe through a suction pipeline; the outlet is communicated with the first one-way valve through an exhaust pipeline; a second one-way valve is arranged on the suction pipeline; the exhaust pipeline is provided with a third one-way valve and an electromagnetic valve; the third one-way valve is close to the first one-way valve; a liquid level switch is arranged on the liquid inlet pipe; the height of the liquid level switch on the liquid inlet pipe is lower than that of the suction pipeline; the liquid level switch is electrically connected with the vacuum pump and the electromagnetic valve. The pipeline system is simplified, the self-priming performance of the pump is improved, and the oil-free rotary vane vacuum type self-priming centrifugal pump has the advantages of being compact in structure, high in efficiency, long in service life and the like.

The invention discloses a self-contained return valve of a self-priming pump. The self-contained reflux valve comprises a base, a driving motor, a pump body and an air extractor are sequentially and fixedly installed at the top end of the base from one side to the other side, an installation plate is arranged at the bottom end of the driving motor and the bottom end of the pump body, a transmission shaft is arranged at one end of the driving motor, and a signal box is installed at the top end of the driving motor. According to the self-contained return valve of the self-priming pump, a wireless module is arranged to facilitate signal connection with a cloud server, so that the device can be remotely controlled and used through the Internet of Things, the air extractor, a return cavity, a plug ball and a self-priming channel are arranged to assist in guiding and conveying liquid to the pump body, an excellent hydraulic model is adopted, the efficiency is higher than that of a common self-priming pump, the self-priming performance is good, the self-priming height is higher than that of a common self-priming pump, and the self-priming time is shorter; and the air extractor and the return cavity are arranged to assist in guiding the liquid to the pump body, the efficiency is higher than that of the common self-priming pump, the self-priming performance is good, the self-priming height is higher than that of the common self-priming pump, and the self-priming time is shorter.

The invention relates to a liquid conveying device, and in particular relates to a self-priming pump capable of applying a fertilizer. The self-priming pump comprises a pump body, a pump shaft and impellers, wherein the pump body is provided with a water inlet cavity, a water outlet cavity, an impeller working cavity, a water replenishing cavity and an air exhaust cavity; the water inlet cavity is communicated with the water outlet cavity via the impeller working cavity; the impellers are mounted on the pump shaft and are positioned in the impeller working cavity; the water replenishing cavity is communicated with the water outlet cavity via holes on the pump body; and the opening of the water replenishing cavity is provided with a one-way valve; the air exhaust cavity is communicated with the impeller working cavity; the opening of the air exhaust cavity is provided with a backflow stop valve; the pump body is further provided with a water draining channel communicated with the air exhaust cavity; the water draining channel is sealed by a water-draining nut; the outlet of the water outlet cavity is provided with a segment of communication pipe connected in parallel with the outlet; the inner tube diameter at the central part of the communication pipe first tapers and then gradually expands; and the central part of the communication pipe is provided with a fertilizer feeding pipe. By adopting the self-priming pump according to the technical scheme, irrigation and fertilizer application can be simultaneously realized, and the self-priming pump is easy to use and has the advantages of high efficiency and short self-priming time.

The invention discloses a self-absorption centrifugal pump with a water return hole capable of being closed automatically. According to the self-absorption centrifugal pump, a coaxial water return hole automatically-closing device is arranged right in front of the water return hole of the pump. The self-absorption centrifugal pump is mainly composed of a cylinder sleeve and a piston moving in the cylinder sleeve. When self-absorption is started by the pump, the piston resets under action of a compression spring; the water return hole is opened, and self-absorption water conveying is conducted; once the self-absorption process is completed, pressure water generated at an outlet of the pump enters a rear cavity of the piston through a pipe; and the piston is driven to advance to block the water return hole, and leakage is eliminated. The self-absorption centrifugal pump has the positive effects that self-absorption time of the pump is shortened; no leakage can be generated; volume losses are reduced; and efficiency of the pump is improved. To prevent the pressure water from damaging the structure, the piston drives a round bar to block the water return hole through the compression spring instead of direct blocking, and therefore if impurities such as sand grains are contained at a conical opening of the water return hole, the situation that leakproofness is lost due to damage of the conical opening can be avoided as a result of protection of the compression spring; and reliable and normal operation of the pump is guaranteed.

The invention discloses a combined type fast self-absorption centrifugal pump which comprises a pump body. The pump body comprises an inducer (2), a centrifugal pump impeller (4), a mechanical sealing structure (5), a main shaft (6), a liquid ring wheel (8), a transmission wheel (9) and an electromagnetic clutch (10). One end of the main shaft (6) is a power input end, and the other end of the main shaft (6) is sequentially fixedly connected with the inducer (2), the impeller (4), the mechanical sealing structure (5) and the electromagnetic clutch (10). The combined type fast self-absorption centrifugal pump is good in self-absorption performance, good in cavitation-resisting performance, easy to operate and low in energy consumption.

The invention relates to a portable fire pump comprising a petrol engine (1) and a pump body (2), wherein the pump body (2) comprises a sealing base (4), a pump shell (3), a main shaft (5), three-level centrifugal impellers and two-level guide blades, wherein the sealing base (4) is connected with the petrol engine (1); the pump shell (3) is fixedly connected with the sealing base (4); the main shaft (5) is arranged in the center of the pump shell (3); the three-level centrifugal impellers are sequentially fixed with the main shaft (5); the two-level guide blades are sequentially fixed in thepump shell (3); the main shaft (5) is coaxially connected with an output shaft of the petrol engine (1); and the sealing base (4) is internally provided with a sealing device (6). The invention solves the technical problems of large size, heavy weight, high energy consumption and easy damage of the traditional fire pump, has the advantages of small size, light weight, portability, low energy consumption and technical effect of the portable fire pump which can automatically close the petrol engine (1) under the condition of an insufficient water source.

The invention discloses an instant energy-saving vertical self-priming pump. The instant energy-saving vertical self-priming pump is characterized in that a water inlet pipe and a water outlet pipe are arranged on the left and right sides of a pump body respectively; a liquid filling port is formed in the water inlet pipe; a valve is arranged on the liquid filling port; a water pressing chamber is formed on the upper part in the pump body, and a water sucking chamber is formed on the lower part in the pump body; an impeller chamber is positioned in the water pressing chamber; the impeller chamber consists of a side wall and a back cover; a plurality of fine through holes communicated with the water pressing chamber are formed in the back cover of the impeller chamber; a water sucking short pipe is arranged on the lower part of the impeller chamber; the water sucking short pipe is communicated with the water sucking chamber; the water outlet pipe is communicated with the impeller chamber; the water inlet pipe is communicated with the water pressing chamber; an impeller in the impeller chamber is fixedly arranged at one end of a pump shaft; the pump shaft is connected with a motor output shaft; a cylindrical upper sealing gland and a lower sealing gland are arranged outside the pump shaft from top to bottom in a sleeving way; a negative-pressure sealing device is arranged on the pump shaft. The instant energy-saving vertical self-priming pump is easy to operate, contributes to energy saving, is durable, and can be used instantly.

The invention provides a novel dry starting self-sucking pump, which comprises a liquid storage chamber, outer self-sucking chamber and inner self-sucking chamber which are sequentially arranged fromoutside to inside, wherein the inner self-sucking chamber is provided with a main shaft and three-leaf partition plates which are rotatably mounted on the main shaft, the top of the leaf of each partition plate is tightly jointed with the inner wall surface of the inner self-sucking chamber, three identical contraction grooves are arranged on the outer side of the inner self-sucking chamber, a spring and a separation baffle are arranged in each contraction groove, one side of each contraction groove is provided with an exhaust pipe, and the other side of the contraction groove is provided witha suction pipe, the exhaust pipe is communicated with the liquid storage chamber and the outer self-sucking chamber, the suction pipe is communicated with the inner self-sucking chamber and the outerself-sucking cavity, the bottom end of the outer self-sucking chamber is provided with a pump inlet pipe along the tangential direction, a check valve is arranged in the pump inlet pipe. According tothe invention, the problem that water is needed when the self-sucking pump is firstly started is solved, the dry starting of the self-sucking pump is achieved, the self-sucking pump can work normallywhen started again, nine times of self-sucking can be completed when the three-leaf plates rotate for one circle, the working efficiency is obviously improved, and the operation process is greatly simplified.

The invention discloses a gas-liquid separation device for enhancing the self-suction of a self-suction multistage centrifugal pump. The gas-liquid separation device is arranged inside the self-priming centrifugal pump. The gas-liquid separation device is mainly composed of two parts: an annular bracket and a ring-shaped spiral channel installed close to the annular bracket. The surface of the spiral channel is uniform Coated with hydrophobic materials to form a ring-shaped spiral tube channel on the hydrophobic surface supported by a ring bracket; the above-mentioned gas-liquid separation device is installed between the cavity of the pump casing and the pump casing, and the inner and outer rings are tightly fitted to the cavity and the pump casing respectively. The top and bottom of the gas-liquid separation device are provided with fan-shaped openings, the top is the exhaust port, and the bottom is the water return port; the above-mentioned gas-liquid separation device is installed in the area near the pump outlet, so that the gas-liquid separation device The exhaust port faces the pump outlet, and the return port The water port is located at the bottom of the pump. The annular gas-liquid separation device of the present invention has the advantages of simple structure, convenient installation, low processing difficulty, light weight, easy access to raw materials, and broad application prospects.

The invention discloses a parasitical auxiliary self-priming vacuum pump which comprises a flow passage component and a power component. A sealed chamber of the flow passage component is composed of aneck seal, an upper cover, a lower cover, an outlet check pad and an inlet check pad. A diaphragm is arranged in the sealed chamber, and a diaphragm check pad is arranged in the middle of the upper surface of the diaphragm. A diaphragm shaft sequentially penetrates the diaphragm check pad, the diaphragm and the neck seal from top to bottom, and the lower end of the diaphragm shaft stretches intoa crankshaft box of the power component and is fixedly connected with a crankshaft. The crankshaft in the crankshaft box drives a diaphragm sheet to continuously and vertically move through the diaphragm shaft, the diaphragm sheet and the three check pads cooperate, and air is extracted to a lower chamber of a sealed cavity from a pump cavity of a water pump, then pressed to an upper chamber to move in one way and finally exhausted to the atmosphere to assist in self priming of the water pump. According to the vacuum pump, the secondary self-priming work efficiency of a dry mounted centrifugalpump can be improved, and production and rescue losses caused by long-time preparation of a primer pump can be reduced; and meanwhile potential safety hazards of manpower can be avoided, and the labor intensity can be reduced.