CN104696260A - Novel sewage pump cutting device - Google Patents

Abstract

The invention discloses a novel sewage pump cutting device. The novel sewage pump cutting device is mainly composed of a bearing (1), a mechanical seal (2), a connecting key (3), an impeller (4), a pump shaft (5), a front cover plate (6), a ring (7), a cutter head (8), a round nut (9), a pump body (10), an impeller inlet (11) and the like. A submersible sewage pump is provided with the cutter head (8) mounted at the impeller inlet (11) in a pump housing and having dual functions of cutting and stirring. The cutter head (8) is mounted on the pump shaft (5) in front of the impeller inlet and in co-rotation with the impeller to form three-blade radial uniform distribution. The thickness L of every blade of the cuter head (8) is 10 mm-18 mm and the inclination angle alpha is 70 degrees to 85 degrees. The cutter head is treated in a heat treatment process for improving the hardness, abrasion resistance and impact resistance. Impurities, such as long fibers and large particles in sewage are pre-cut by the cutting device before entering the impeller and discharged to a sewage pipe through the sewage pump. The novel sewage pump cutting device has the advantages of solving the problems of particle clogging, long fiber winding and sedimentation of the sewage pump, achieving pre-cutting of impurities, such as the long fibers, ensuring the passing-through performance and the anti-clogging performance of the sewage pump, prolonging the service life of the sewage pump and improving the operation stability of the sewage pump.

Description

A kind of Novel sewage pump cutting device

Technical field

The present invention relates to a kind of Novel sewage pump cutting device, belong to fluid machinery technical field, be particularly useful for submerged pump conveying dirt impurity.

Background technique

Sewage pump is mainly for delivery of the impurity containing fiber, particle such as urban sewage, industrial wastewater, but owing to often containing various large particle, long fibre in carried medium as impurity such as long plastic optical fibre, bastose, operationally especially easily there is blockage problem in pump, cause blowdown not smooth, thus affect pump by performance and operational efficiency, reduce its reliability and working life.Existing a lot of sewage pump containing cutting device is only operationally stirred evenly by sewage, and the winding problem of the impurity such as pack fiber can not get solving always.Therefore, what realize sewage pump is the key technology being badly in need of at present solving without blocking and high-efficiency operation.

Through retrieval, published patent " cutting assembly of stainless steel cut submersible pump " (application number: 201210351024.2), it comprises the secondary dynamic cutting pair with being coaxially located in through hole of quiet cutting that has manhole, having between sound cutting pair can for the medium channel of medium from the through hole Single port of quiet cutting pair to another port, in order to cut long fibre foreign material and granular solids foreign material, thus the impeller of submersible cutting pump is avoided to be wound or to block.But install that this cutting device structure is very complicated, cost increases; and it is higher to technological requirement; and only have simple cutting function; if have the sedimentss such as a large amount of long fibres at the bottom of stirring pool; impeller inlet then can be caused to block; cause pump maintenance down, not only shorten the working life of pump but also delay industrial production.Published patent " the cutting ring element of centrifugal chopper pump " (application number: 200680015627.8), it comprises annular component, this component has at least one and arranges also from then on outward extending cutting member along annular component, cutting ring element is configured to adjacent impeller driving side location, this impeller has the cutting element be associated with impeller-driven side, although this cutting element and cutting ring interact to shred and reduce the solids size be pulled away in pumping fluid or slurries, these solid osmotic can be avoided to impeller back face, but this structure is very complicated, not only add manufacturing cost but also make manufacturing process become complicated.

Summary of the invention

For solving the problem, the invention provides a kind of Novel sewage pump cutting device, it is by bearing, mechanical seal, linking bond, impeller, pump shaft, front shroud, choma, cutter head, round nut and the composition such as the pump housing and impeller inlet.Cutter head be arranged on pump shaft with impeller synchronous rotary, and this cutter head has the blade of three radial equipartitions, solves the balance problem of pump, has that balance is good, operate steadily the characteristic such as reliable.When the impurity such as the long fibre in wastewater media, large particle with fluid enter impeller flow to the cutting device place before impeller inlet time, cut off by the slitting wheel of this cutting device, cut broken, then enter impeller internal and enter pipeline eventually through entering spiral case or stator and then effluent pump under the effect of centrifugal force.This cutting device structure is simple, easy for installation, and the impurity such as long fibre are just shredded before entering impeller channel, good cutting effect, thus avoids the blocking of impeller channel.

Described cutting device is through heat treatment process, improve its hardness, wear resistance and shock resistance, when the particle contained in sewage, fiber etc. have higher hardness, this cutting device also can not stress deformation, can improve its working life, and this cutting device structure is simple, very little on the impact of efficiency, hydraulic loss, the effective cutting to long fibre, oarse-grained impurity can be realized, make it easilier be discharged by impeller, effectively improve sewage pump by performance with without plugging performance.

The invention has the beneficial effects as follows, cutter head physical dimension is little, and be high-hardness, the long fibre that is easily wound around and the larger dirt impurity of hardness can be cut off, the impurity such as long fibre just must can enter pump chamber through the cutting of cutter head, decrease blocking up of runner, and what improve sewage pump passes through performance, and this cutting device structure is simple, easy for installation, efficiently solves the problem of sewage pump Particle Blocking and Filament-wound Machine.

The present invention tries out through user, and reflection cutting effect is very good, can improve the conveying of submersible sewage pump impeller Non-blinding pump containing the prehensile during impurity such as long fibre, large particle and blocking property.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention will be further described.

Fig. 1 is that Novel sewage pump cutting device installs total schematic diagram.

Fig. 2 is cutting device A direction view.

Fig. 3 is cutting device plan view.

In Fig. 1,1. bearing, 2. mechanical seal, 3. linking bond, 4. impeller, 5. pump shaft, 6. front shroud, 7. choma, 8. cutter head, 9. round nut, the 10. pump housing, 11. impeller inlets;

In Fig. 2, cutter head three blade radial symmetric is uniform.

In Fig. 3, cutter head blade thickness L is 10 ~ 18mm, and blade tilt angle α is 70 ° ~ 85 °.

Embodiment

Below in conjunction with accompanying drawing, technological scheme of the present invention is described in detail:

In Fig. 1, a kind of Novel sewage pump cutting device, comprises bearing (1), mechanical seal (2), linking bond (3), impeller (4), pump shaft (5), front shroud (6), choma (7), cutter head (8), round nut (9), the pump housing (10), impeller inlet (11) etc.It is front that cutter device cutter head (8) is installed on impeller inlet (11), and with pump shaft (5) and impeller (4) synchronous rotary.

During pump running, motor is by driving pump shaft, bearings impeller (4) and cutter head (8) synchronous rotary, will flow through impeller (4) acting from sewage pump suction port and be discharged in blow-off line containing long fibre, oarse-grained sewage.When long fibres etc. flow through cutter head (8) place of cutter device, cut broken by the cutter head at this place (8) cut-out, can realize precuting impurity such as fibers, and under the impact of import wastewater media, the impurity after chopping enters in pump and is delivered to impeller outlet place and then discharge.This cutter head (8) makes the impurity such as long fibre not easily twine to tie up, is blocked in impeller inlet, and it is very little on the impact of efficiency, hydraulic loss, improve sewage pump by performance, reliability and working life, therefore this structure is simple, cost is low, and effectively prevents impeller ring from blocking and the bad phenomenon such as stuck.

In Fig. 2 and Fig. 3, cutter head three blade radial symmetric is uniform, and blade thickness L is 10 ~ 18mm, and blade tilt angle α is 70 ° ~ 85 °, thus solve the balance problem of sewage pump, therefore have with the sewage pump of this cutting device that balance is good, operate steadily the characteristic such as reliable.

Claims (3)

1. a Novel sewage pump cutting device, comprise bearing (1), mechanical seal (2), linking bond (3), impeller (4), pump shaft (5), front shroud (6), choma (7), cutter head (8), round nut (9), the pump housing (10), impeller inlets (11) etc., submerged pump are provided with cutter head (8), and it is installed on the dual functions that pump case impeller inlet (11) has cutting concurrently and stirs.

2. a kind of Novel sewage pump cutting device as claimed in claim 1, it is characterized in that cutter head (8) be installed on impeller inlet before the upper and impeller of pump shaft (5) jointly rotate.

3. a kind of Novel sewage pump cutting device as claimed in claim 1, it is characterized in that cutter head (8) is three blade radial equipartitions, this cutter head (8) blade thickness L is 10 ~ 18mm, blade tilt angle α is 70 ° ~ 85 °, pump shaft (5) rotates and moves cutter head (8) synchronous rotary, thus produce extremely strong cutting force, can the cut-out of the long fibre, large particle etc. at impeller inlet (11) place be cut broken, make impurity enter impeller smoothly.