CN2178290Y

CN2178290Y - Non-plugging self-priming centrifugal impurity pump

Info

Publication number: CN2178290Y
Application number: CN 93244625
Authority: CN
Inventors: 仪群; 楼文尧
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-03
Filing date: 1993-11-03
Publication date: 1994-09-28
Anticipated expiration: 2003-11-03

Abstract

The utility model relates to a non-plugging self-priming centrifugal impurity pump, which can complete the self-priming function by utilizing structures such as a non-plugging centrifugal working wheel, a sewage disposal apparatus which can also start and stop a reflux hole, a corresponding press water chamber diffusion tube, a corresponding gas-liquid separation chamber, a corresponding liquid storage chamber, a corresponding reflux hole, a corresponding scroll-case channel, a corresponding isolation tongue, etc., can convey the clear quality liquid, and can also convey the two phase flow liquid such as dirt containing impurities, etc. The utility model overcomes the problem that the self-priming centrifugal pump can not convey the two-phase flow liquid containing the impurities, solid particles, etc. in days of old. The utility model has the advantages of simple structure, small size, good self-priming function, good performance, reliable work, multipurpose pump, etc.

Description

Non-plugging self-priming centrifugal impurity pump

The utility model patent relates to a kind of nothing and stops up the self-priming centrifugal impurities pump.

Self-priming centrifugal pump since have rely on pump self internal structure and need not add any auxiliary device just can finish self-absorption function with have simple in structure, volume is little, efficient is high, self-priming performance is good, reliable operation, operate steadily, characteristics such as easy to maintenance, therefore, industries such as hydraulic and electric engineering, metallurgy, petrochemical industry, refinery, oil depot, boats and ships naval vessels, Aero-Space, automobile making have been widely used at present.But take a broad view of over the self-priming centrifugal pump of all structures, the medium of its conveying generally is the liquid of matter clearly.In fact, often need to carry similar chemical fibre, sewage, mud, paper pulp etc. to contain the liquid of the two-phase flow medium of solid particle in industries such as municipal engineering, mine, chemical industry, environmental protection, papermaking, food.In this case, Chang Gui self-priming centrifugal pump was owing to be subjected to the influence and the restriction of its structure in the past, and impeller all can be blocked during pump work, can't finish the usage requirement under such operating mode at all.Also just retrained the using scope of self-priming centrifugal pump like this, in a sense.And that vacuum equipment that adopts at present and special centrifugal pump or mixed flow pump are united on the own technology of method of carrying impurity and two-phase flow media fluid is unreasonable, also increased the investment of equipment in addition greatly, and it is also bigger to close the spatial volume that accounts for.Thereby, invent and develop a kind of self-absorption function that has, and can carry the nothing of two-phase flow media fluids such as containing impurity dirt and solid particle to stop up the usage requirement that the self-priming centrifugal impurities pump satisfies extraordinary occasion operating mode to be very important.

The purpose of the utility model patent proposes a kind ofly to rely on and utilize the internal structure of pump own to finish self-absorption function exactly, and the nothing that can carry clear matter liquid can also carry simultaneously to contain two-phase flow liquid such as impurity dirt is stopped up the self-priming centrifugal impurities pump.

The task of the utility model patent is achieved through the following technical solutions.

The basic structure form of the utility model patent mainly is made up of the main body and the bearing body part of pump case.Have one in the pump and do not have the centrifugal working impeller of obstruction, it and pump shaft are contained in the same housing of pump together.Also be provided with a sewage disposal apparatus in the pump.Has a pumping chamber diffusing tube in the pump case of this structure, a gas-liquid separation chamber, a liquid storage room, a return port, a volute flow passage and a cut water.The pumping chamber diffusing tube of above-mentioned feature, gas-liquid separation chamber, liquid storage room, return port, volute flow passage and cut water have constituted the main body of pump case.Wherein the pumping chamber diffusing tube is connected with the volute flow passage outlet of pump case, is positioned at the top of pump case, and its top is the inclined-plane that has gradient.Gas-liquid separation chamber is positioned at the top of pump case.Liquid storage room is positioned at the bottom of pump case.Volute flow passage is positioned at the middle part of pump case.Return port designs the below, back in the pump case runner, is positioned at 190～210 degree places of pump case cut water top starting point, and is on the center line of pump case runner, and its geometrical shape is circle, and it gangs up the liquid storage room and the volute flow passage of pump case.It is that single channel or Twin channel also can be the triple channel blade structures that nothing in the pump is stopped up centrifugal working impeller, and blade adopts the curved surface circular arc to connect, and the transition of its blade path and impeller front and rear cover plate is the orthodrome transition.Double mechanical seal is adopted in shaft sealing in the pump.Radial clearance in the pump between pump case cut water and the nothing obstruction centrifugal working impeller is between 0.5～1mm.Sewage disposal apparatus in the pump designs under pump case inlet, and directly and return port match, can open or the closing volume hole.

The working principle and the working procedure of the utility model Patent equipment are as follows:

Because suction port has certain height, so have certain liquid in the liquid storage room of pump at ordinary times always.When return port is in opening state, priming pump, the impeller rotation, impurity liquid that impeller is deposited suction chamber and the air in the suction line suck together, and in impeller, mixed fully, under action of centrifugal force, impurity liquid is being carried gas secretly and is being flowed to impeller outer edge, forms certain thickness foam band and high speed rotating pendular ring in the outer rim of impeller.Because the effect of cut water, gas liquid mixture enters gas-liquid separation chamber by the pumping chamber diffusing tube.At this moment, because flow velocity reduces suddenly, lighter gas is separated from mixed solution, and overflow by pump discharge, and heavier impurity liquid turns back to liquid storage room, and advance foliation once more by return port and take turns, the gas that sucks from suction line with impeller inside mixes once more, participates in the work of exhaust process again ...Along with the carrying out that this process is gone round and begun again, till the gas in pump and the suction line is all drained, finish the self-priming process, pump just drops into the normal infusion operation.In infusion process, can also can not close return port in the closing volume hole.

This nothing is stopped up self-priming centrifugal impurities pump utility model patent and is had following characteristics:

1. solve and broken through the boundary that self-priming centrifugal pump in the past can not be carried impurity dirt and two-phase flow liquid, the application area of self-priming centrifugal pump is enlarged.

2. can utilize the internal structure of pump own and not need any additional device just can finish self-absorption function, and self-priming performance is good.

3. adopted the structure of non-clogging impeller blade, guaranteed that the impurity dirt can pass through smoothly, does not exist the phenomenon of clogging impeller.

4. set up sewage disposal apparatus in the pump, made using and keeping in repair more conveniently of pump, it is more reliable to work.

5. set up the closing mechanism device of return port in the pump, the efficient of pump can have been improved 4～6%.

6. this device has adopted double mechanical seal, has satisfied the usage requirement of carrying the impurity dirt, and sealing is reliable, and the life-span is long.

7. this device has kept the advantage of centrifugal pump, and running wheel does not contact and the rigidity friction with other parts existence.So, safe and reliable, easy to operate, operate steadily, functional.

The explanation of accompanying drawing drawing:

Fig. 1. the structure diagram of the working principle of the utility model patent and concrete device.

Fig. 2. the A-A pump case sectional drawing of Fig. 1 structure.

Fig. 3. there is not the hydraulic model schematic representation that stops up centrifugal working impeller in Fig. 1 structure.

Fig. 4. the hydraulic model schematic representation of volute flow passage in Fig. 1 structure.

1 is pump shaft among Fig. 1, and 2 is bearing, and 3 are packing seal, 4 is coupling, and 5 is end cap, and 6 is bearing support, 7 is oil deflector, and 8 is lubricating cup, and 9 are double seals, 10 is mechanical sealing base, and 11 is retainer ring, and 12 for there not being the running wheel of obstruction, 13 is impeller nut, and 14 is circular volute, and 15 is the pumping chamber diffusing tube, 16 is the liquid separation chamber, and 17 is inlet port, and 18 is suction chamber, 19 is pump case, and 20 is inlet port, and 21 is return port, 22 are the bar of removing contamination, and 23 is liquid storage room, and 24 are the cleaning orifice plate, 25 is the O RunddichtringO, 26 are the control pin, and 27 is stuffing box gland, and 28 is end luffer boards.

The demonstration that this figure is detailed mutual assembly relation between each component of this device, also shown pump case pumping chamber diffusing tube, gas-liquid separation chamber, liquid storage room, volute flow passage, return port, the relative position between the suction chamber.The return port closing mechanism device that is provided with in the device has significantly reduced the return loss of pump, has reached the purpose of raising the efficiency.

29 is cut water among Fig. 2.The demonstration that this figure is detailed the position of pump case cut water and return port.

The demonstration that Fig. 3 is detailed pump do not have the shape of stopping up centrifugal working impeller and the structure of blade.

The demonstration that Fig. 4 is detailed the shape and structure of pump volute flow passage.

Claims

1, do not have the device that obstruction self-priming centrifugal impurities pump is made up of the main body and the bearing body part of pump case, have one in the pump and do not have the centrifugal working impeller of obstruction and a sewage disposal apparatus; It is characterized in that having in the pump pumping chamber diffusing tube, a gas-liquid separation chamber, a liquid storage room, a return port, a volute flow passage and a cut water; The pumping chamber diffusing tube, gas-liquid separation chamber, liquid storage room, return port, volute flow passage and cut water have constituted the main body of pump case; The pumping chamber diffusing tube is connected with the volute flow passage outlet, is positioned at the top of pump case, and its top is the inclined-plane that has gradient; Gas-liquid separation chamber is positioned at the top of pump case; Liquid storage room is positioned at the bottom of pump case; Volute flow passage is positioned at the middle part of pump case; Return port designs the below, back in the pump case volute flow passage, is positioned at 190～120 degree places of pump case cut water top starting point, and is on the center line in pump case eddy current road, and its geometrical shape is circle; Sewage disposal apparatus be positioned at pump case inlet under, and directly and return port match, can open or the closing volume hole.

2, nothing according to claim 1 is stopped up the self-priming centrifugal impurities pump, it is characterized in that not having the centrifugal working impeller of obstruction is that single channel or Twin channel also can be the triple channel blade structures, blade adopts the curved surface circular arc to connect, and the transition of its blade path and impeller front and rear cover plate is the orthodrome transition.

3, nothing according to claim 1 is stopped up the self-priming centrifugal impurities pump, it is characterized in that the axle envelope of pump is double mechanical seal.

4, nothing according to claim 1 is stopped up the self-priming centrifugal impurities pump, it is characterized in that the pump case cut water and does not have radial clearance between the obstruction centrifugal working impeller between 0.5～1mm.