CN2091972U

CN2091972U - Leakless anti-corrosion pump

Info

Publication number: CN2091972U
Application number: CN91210555U
Authority: CN
Inventors: 何敬之
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-05-10
Filing date: 1991-05-10
Publication date: 1992-01-01

Abstract

The utility model relates to a water pump, in particular to a leakless anti-corrosion pump for petroleum, chemical industries, metallurgy industries, the amylum, the medicine, food industries, etc. The utility model comprises a motor assembled on a pump base, a pump body, a pump rack, a pump cover, impellers made from glass fibre reinforced plastics, wherein, the impeller is a narrow slit type volute centrifugation composite structure and comprises positive blades, back blades, packing spirals. The pump body is provided with a straight groove type volute delivery chamber, and the pump rack assembled with the pump body is only made of the support frames of the pump body. The utility model can effectively prevent the leakage of overflowing liquid and have the advantages of compact structure, small volume, low manufacture cost, convenient maintenance, and energy saving.

Description

Leakless anti-corrosion pump

The utility model relates to a kind of water pump, and what particularly be widely used in industries such as oil, chemical industry, metallurgy, starch, medicine, food does not leak corrosion protection pump.

At present, the water pump of using always in industries such as oil, chemical industry, metallurgy, starch, medicine, food has numerous species, and according to the requirement of using, brings in constant renewal in and improve, but still the shortcoming that exists some to still need and overcome.The existing pump housing and impeller are ironcasting mostly, not only weight is big, volume is big, and the flow passage site surface is coarse, directly influence usabilities such as pump efficiency, flow, lift, the serious leakage that causes because of poor sealing simultaneously, conveying contain the heavy corrosion that the Korrosionsmedium material produces, all increase the maintenance load of changing component, influence operating efficiency.As adopt stainless steel material to make the pump housing and impeller, except that increasing manufacture cost, still can't resolve leakage problem.

The purpose of this utility model provides a kind of improved corrosion protection pump that do not leak, and it can prevent the overcurrent leak of liquid effectively, has compact structure, volume is little, low cost of manufacture, easy to maintenance, energy-saving advantages.

The purpose of this utility model is achieved in that this device comprises the motor that is assembled on the pump seat and the pump housing of being made by glass fibre reinforced plastics, pump bracket, pump cover, impeller, wherein impeller is the centrifugal fabricated structure of narrow slit type scroll-type, comprise positive blade, pay blade, spiral seal, the pump housing is shaped on straight channel type vortex delivery chamber, and the pump bracket that fits together with the pump housing only is made of pump housing bearing support.Adopt the corrosion protection pump of said structure, can realize the purpose of not leaking.

Because the impeller of the narrow slit type scroll-type exocentric structure that the utility model adopts positive blade, pays blade, spiral seal is combined into, make impeller fundamentally change the structural type of conventional impellers, so this impeller send the function except that having to raise, also have sealing function, guarantee that the on-stream material of pump never leaks.The delivery chamber of the existing corrosion protection pump pump housing generally all is the curved flute type scroll-type, its degree of suction vacu um is lower, this pump pump housing adopts straight channel type scroll-type delivery chamber, can improve about degree of suction vacu um 30-40%, be particularly suitable for carrying the corrosion liquid that contains suspended matter and certain viscosity, significantly improved the usability of pump.Existing corrosion protection pump pump bracket is formed by many parts such as pump housing bearing support, bearing gland, bearing housing, and not only volume is big, and requires machining accuracy very high, and processing technology is complicated, so the processing cost height.And the utility model thoroughly changes the pump bracket structure, is designed to only be made of pump housing bearing support through changing shape, and compact structure, but simplified processing process are significantly reduced to this.Therefore the utility model is very easily applied.

Below in conjunction with accompanying drawing the utility model being done a step describes.

Fig. 1 is a kind of concrete structure schematic representation of the utility model.

Fig. 2 is a kind of structure sectional view of impeller.

Fig. 3 is the left view of Fig. 2.

Fig. 4 is the right elevation of four positive blades of leaf of Fig. 2.

Fig. 5 is the right elevation of six positive blades of leaf of Fig. 2.

Fig. 6 is a kind of structure sectional view of pump bracket.

Fig. 7 is the structural representation of existing pump bracket.

Fig. 8 is a pump housing delivery chamber schematic cross-section.

Fig. 9 is existing pump housing delivery chamber schematic cross-section.

Describe concrete structure of the present utility model in detail according to Fig. 1-9.1 pump housing among the figure, 2 impellers, 3 pump brackets, 4 pump covers, 5 main shafts, 6 pump seats, 7 motor, 8 positive blades, 9 pairs of blades, 10 spiral seals.Be assembled with the pump bracket 3 of motor 7 on the pump seat 6 of this device.Main shaft 5 links together with motor reel, and impeller 2 is assembled in the pump housing 1 and the pump bracket 3 by pump cover 4.Wherein impeller 2, pump cover 4, the pump housing 1 and pump bracket 3 are made by glass fibre reinforced plastics.Impeller 2 is the centrifugal composite structure of narrow slit type scroll-type, it comprise can suck and the positive blade 8 of the liquid that spues, end face centrifugal seal pay blade 9, can carry out the spiral seal 10 of axial seal.The quantity of sheet leaf can manufacture according to actual needs.Fig. 4, Fig. 5 are the positive blade 8 with four leaves or six leaves.The pump housing inner chamber that has liquid entering hole and liquid port is made straight channel type scroll-type delivery chamber (shown in Figure 8), and the pump bracket 2 that fits together with the pump housing 1 only is made of pump housing bearing support, cancels structures such as traditional bearing housing, bearing gland.Only need a shaft end seal to fill between itself and the main shaft 5 and get final product, both simplified processing technology compared with the prior art, can save machining period 50% again, saving material 60% reduces cost about 60%.

During operation, liquid pumps through high-speed rotating impeller from pump housing liquid entering hole.Because the high degree of suction vacu um that straight channel type scroll-type delivery chamber is had in the end face of the centrifugal combined impeller of narrow slit type scroll-type and axial seal effect and the pump housing, thus can make overcurrent liquid never to external leakage, have significantly energy-conservation, the effect of enhancing productivity.

Claims

1, a kind ofly makes the pump housing, pump bracket, pump cover, impeller by glass fibre reinforced plastics, it is characterized in that impeller is the centrifugal fabricated structure of narrow slit type scroll-type, comprise positive blade, pay blade, spiral seal, the pump housing is shaped on straight channel type vortex delivery chamber, and the pump bracket that fits together with the pump housing only is made of pump housing bearing support.