CN2134514Y

CN2134514Y - Anti-leak, corrosion-resisting centrifugal pump

Info

Publication number: CN2134514Y
Application number: CN 92215983
Authority: CN
Inventors: 吴勤昌
Original assignee: Guiying Seal Material Mfg Co ltd Shanghai
Current assignee: Guiying Seal Material Mfg Co ltd Shanghai
Priority date: 1992-08-12
Filing date: 1992-08-12
Publication date: 1993-05-26
Anticipated expiration: 2002-08-12

Abstract

The utility model relates to an anti-leak, corrosion-resisting centrifugal pump which can transport liquid in the hard condition. On the basis of a fluorin plastic line, the utility model adopts a new structure on an impeller and a mechanical sealing unit in order to achieve the purposes of leakage prevention and corrosion resistance.

Description

Anti-leak, corrosion-resisting centrifugal pump

The utility model relates in the industries such as chemical industry, medicine, oil, metallurgy the centrifugal pump of corrosive liquids such as carrying acid, alkali, is particularly useful for-50 ℃---nothing leakage, corrosion resisting centrifugal pump under+200 ℃ of severe rugged environments.

At present, the various centrifugal pumps that we produce, during pump work, because liquid stream throws away from axially entering into radially, entering the narrow and flow direction sudden turn of events of blade place runner, pressure becomes malleation by negative pressure rapidly, very increasing of sudden change that flows to and pressure, cause liquid stream shakiness in the pump, blade and liquid stream relative velocity are big, carry the very strong liquid of corrosivity with this pump, how long have more than is needed, stomach, run, leak, it is very serious to drip phenomenon, so, pump housing Designer adopts some corrosion resistant alloyed steels both at home and abroad, or do pump housing material with fluoroplastics lining, the corrosion protection pump that the former alloyed steel is made is made comparatively simple, the machining accuracy height, but cost an arm and a leg, and at strong acid, the highly basic following life-span of condition is also shorter, and the latter is topped on other parts of the pump housing that contacts with medium with corrosion resistant fluoroplastic, its corrosion resistance is much higher than alloy steel pump, this class pump data at home and abroad all has introduction, and as domestic patent, 91210590.9 and 91212690.6 all relate to the centrifugal pump with fluoroplastics lining, but, to really solve emitting that this type of centrifugal pump in use produced, run, leak, a difficult problem of dripping plays the effect of efficient energy-saving, also has many work to do.Characteristic of centrifugal pump design person for this reason, all in the key point of centrifugal pump--work hard in impeller and the mechanical seal.

The purpose of this utility model is to adopt a kind of new structure in the impeller of centrifugal pump and mechanical seal, does not have leakage, corrosion resistant purpose to reach centrifugal pump.

The utility model is achieved like this, on the basis of common back boxing fluoroplastic centrifugal pump, whole impeller adopts the fluoroplastic compacting to form, in order to increase mechanical strength, the steel axle sleeve is housed in the impeller middle spindle hole, impeller divides axial main impeller and axial sub-propeller again, and they all are to be launched by central shaft hole radius vector external spiral, but major-minor impeller Hand of spiral is happy good opposite.Therefore, this design makes a part of liquid that leaks the back, owing to be subjected to axial accessory lobes axle centrifugal action, reaches leak free purpose thereby return axial main impeller end again by return port.Simultaneously in the mechanical seal combination, the rotating ring pad adopts the tetrafluoro material, rotating ring and friction head adopt Carborundum to make material, so both can play the effect of acid-fast alkali-proof, can prevent again because heat rises, shrinkage causes to be blocked and weares and teares, in order to prevent owing to the wearing and tearing of dynamic and static ring and the leakage that mechanical fit on error is caused in the long-term using process, the utility model is equipped with to contain in mechanical seal group body to be let out Pan Hesheng and lets out the dish stamen, may leak liquid is transmitted back in the liquid storage tank by leading fistulae, owing to taked above-mentioned two containment measures, the utility model reaches fully not have and leaks corrosion resistant purpose

The utility model is described in further detail below in conjunction with accompanying drawing.

Accompanying drawing 1 does not have the overall construction drawing of leakage, corrosion resisting centrifugal pump.

Fig. 2 cuts open front view for impeller office.

Fig. 3 is the impeller right elevation

Fig. 4 is the impeller left view

Fig. 5 is the mechanical seal constitutional diagram of centrifugal pump.

With reference to Fig. 1-5, the utility model is by carriage 1, coupling 2, mechanical seal combination 3, the pump housing 4, impeller 5, the outer power mechanism 28 of the pump cover 6 and the pump housing is formed, be characterized in that impeller 5 is to adopt a die casting of fluoroplastic to form by whole impeller, steel axle sleeve 7 is housed in the impeller middle spindle hole, steel axle sleeve external diameter has a plurality of grooves, to increase outer fluoroplastic adhesion, prevent that the diameter of axle is to moving, impeller divides axial main impeller 8 and axial sub-propeller 9, axially main impeller 8 and sub-propeller 9 have several by the outer spiral bar of launching of central shaft hole radius vector, major-minor impeller 8,9 Hand of spiral are happy good opposite, main impeller 8 is that left-handed gradual change is wide, sub-propeller 9 dextrorotation are wide, at sub-propeller 9 with radially between the delivery outlet 10, have return port 11, during proper functioning, because the axially effect of sub-propeller 9, produce a centrifugal force, stop the leakage of the normal flow path of liquid; And is back to radially delivery outlet with leakage liquid, simultaneously, mechanical seal combination 3 is by two rotating ring packing rings 12, rotating ring 13, bellows 14, friction 15, support ring 16, support ring matrix 17, pressure ring 18, pushing out ring 19, spring seat 20, levelling volution 21, spring 22, rotating ring trim ring 23, rotating ring trim ring matrix 24, Sheng is let out dish 25, Sheng is let out dish core 26, drainage conduit 27 is formed by combining, rotating ring 2 Carborundum material, to increase its wear resistance, make pad at the rotating ring pad 12 that rotating ring two sides are made of ptfe plastic, and then rotating ring is equipped with Carborundum friction 15, bellows 14 is to make with ptfe plastic, regulate levelling volution 21, by spring 20, spring seat 18, support ring 16, support ring matrix 17, bellows 14 is regulated gap between friction 15 and the rotating ring 13, prevents letting out to reach, the requirement of sealing.Pushing out ring 19 rotating ring trim rings 23, rotating ring trim ring matrix 24, contain and let out dish 25, dish core 26 and make material, contain and let out dish 25 and Sheng and let out and coil core 26 and be recycled in the liquid storage tank by conduit 27 in order to contain leakage liquid ， And with fluoroplastic F46.

Claims

1, a kind of nothing leakage, corrosion resisting centrifugal pump, it is made up of carriage 1, coupling 2, mechanical seal combination 3, the pump housing 4, impeller 5, pump cover 6 and the outer power mechanism 28 of the pump housing, it is characterized in that:

1. whole impeller adopts the fluoroplastic compacting to form, in order to increase mechanical strength, be equipped with in the impeller middle spindle hole steel axle sleeve 7, impeller divide again axial main impeller 8 and axially sub-propeller 9, they all are to be launched by central shaft hole radius vector external spiral, but major and minor impeller Hand of spiral is happy opposite.Owing to be subjected to axial sub-propeller centrifugal action, turn back to the main impeller end again by return port.

2 mechanical seal combination 3 is arranged, it is contained by two rotating ring packing rings 12, rotating ring 13, bellows 14, friction 15, support ring 16, support ring matrix 17, pressure ring 18, pushing out ring 19, spring seat 20, levelling volution 21, spring 22, rotating ring trim ring 23, rotating ring trim ring matrix 24 and lets out dish 25 and combine, regulate levelling volution 21, regulate gap between friction 15 and the rotating ring 13, prevent letting out to reach, seal request by spring 20, spring seat 18 support rings 16, support ring matrix 17, bellows 14.

2, centrifugal pump according to claim 1 is characterized in that the main impeller 8 of impeller launches for left-handed expansion, sub-propeller 9 dextrorotation, at sub-propeller 9 with radially between the delivery outlet 10, has return port 11.

3, the helical wheel width that centrifugal pump according to claim 1, its feature are positioned at main impeller 8 is gradual change, and sub-propeller 9 is wide.

4, centrifugal pump according to claim 1 is characterized in that the external diameter of the central steel axle sleeve 7 in the impeller 5 has a plurality of grooves.

5, centrifugal pump according to claim 1, its feature are positioned at the rotating ring pad 12 that rotating ring two sides make of ptfe plastic and make pad, and and then rotating ring is equipped with Carborundum friction 15.

6, centrifugal pump according to claim 1 is characterized in that the mechanical seal combination has a Sheng to let out dish 25 and dish stamen 26, And are communicated with liquid storage tank by conduit 27.

7, centrifugal pump according to claim 1 is characterized in that pushing out ring 19, rotating ring trim ring 23, rotating ring trim ring matrix 24, Sheng pond dish 25, dish stamen 26 conduits 27 in the mechanical seal combination are all made material with fluoroplastic F46.

8, centrifugal pump according to claim 1, it is characterized in that rotating ring 13, the friction 15 a usefulness Carborundum make material.