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 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 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.

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 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 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 pump body powerful self-suction structure which comprises a pump cover, an eccentric chamber base, an eccentric chamber, an impeller and a pump shaft, the impeller is installed between the pump cover and the eccentric chamber, the front-back gap of the impeller is 0.3-0.35 mm, an inner hole of the impeller is in clearance fit with the pump shaft, the eccentric chamber is upwards eccentric by 5-6 mm, a first crescent groove is formed in the back face of the eccentric chamber, and the eccentric chamber base is arranged outside the eccentric chamber in a sleeving mode. A second crescent groove communicated with the first crescent groove is formed in the eccentric chamber base, the second crescent groove is communicated with an exhaust port in the eccentric chamber base, the eccentric chamber base is fixedly connected with the pump cover, working fluid is contained in the eccentric chamber, an air inlet is formed in the side, opposite to the exhaust port, of the eccentric chamber base, the air inlet is communicated with the pump cavity, and the number of blades of the impeller is more than 20. The self-suction impeller is simple in structure, ingenious in design, space-saving, low in cost, capable of quickly and automatically sucking liquid after exhausting, short in self-suction time, high in self-suction height, wide in application prospect and beneficial to popularization and application.

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 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.