CN2125738U

CN2125738U - Strong sewage self-suction device

Info

Publication number: CN2125738U
Application number: CN 92209212
Authority: CN
Inventors: 郭宝权
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-13
Filing date: 1992-05-13
Publication date: 1992-12-23

Abstract

The utility model provides a strong sewage self-suction pump, relating to a centrifugal pump and an aspirator. The pump is composed of the centrifugal pump, the aspirator, an air-water separation ball and an air duct. Because the centrifugal pump adopts open impellers with balance holes, the back plate of the impeller is provided with an attrition-resistant clearance sealing ring, and the impeller is connected with a shaft formed slip-ring, so the impeller can automatically regulate the position for eliminating axial force. A balance disc is arranged on the back cover of a worm wheel and even strengthens the balance ability of the impeller. Sealing elements and the glands of the sealing elements are arranged at the inner wall of the back end of the spiral casing and are cheap to replace. The high performance aspirator adopts a set of eccentric sleeves with different degree of eccentricity for altering the travel of a connecting rod, so the service life of the pump is pronged.

Description

Strong sewage self-suction device

This practicality is with the novel combined-type sewage pump of being made up of centrifugal pump and aspirator that relates to.

As everyone knows, submersible pump has good sealing property, can be in continuous operation under the liquid level, and liquid is transported to tens meters, even the high position of hundreds of rice, so become field imperative equipment such as mine drainage, petroleum production, high rise building water supply.At present, a lot of sewage treatment workss also adopt submersible pump to carry sewage, yet adopt submersible pump to carry the real non-optimal selection of sewage, its reason is as follows: in the sewage that (1) Sewage Plant is handled, not only contain the different graininess impurity of granularity, and containing the corrosive chemical of multiple components, submersible pump easily shortens its working life because of mechanical lapping and chemical corrosion; (2) submersible motor, takes place to cause electrical fault because of Sealing damages in the medium-term and long-term operation of the sewage of complicated component by sealed insulation easily; (3) submersible pump must be worked under the liquid level of certain depth, is unfavorable for pond operation clearly; (4) submersible pump maintenance difficulty, and could overhaul after pump must being hung out from the pond, not only dirty but also tire out, be unfavorable for operator's health.So many Sewage Plant have adopted performance more good " strong self-suction sewage pump ", replace the submersible pump of usefulness.

Commercially available common self-priming centrifugal pump though its flow easily designs on request, is made at present, and its maximum self-priming height has only 3 meters.External recently strong self-suction sewage pump for the city, its self-priming height can reach 8.1 meters, and peak rate of flow is 280 meters ³/ hour, this pump can satisfy the need of general small-sized dirty treatment plant water delivery, but the water delivery that can not satisfy large-scale wastewater treatment plant requires the major defect of this pump to be: the impeller that the centrifugal pump of (1) this pump adopts is common impeller, impeller is a fixed connection with axle, can not reduce or eliminate huge end thrust, so its bearing life is subjected to very big influence, also has influence on the more design and the manufacturing of high-capacity pump; (2) aspirator of this pump, no matter under which kind of operating mode, it is actuated body and all back and forth moves with a certain fixed journey system, this has not only increased the friction between axle and seal ring, and influence the seal ring life-span, also easily because of actuating the Sealing fatigue on the body periphery, and make the seal life reduction; (3) coolings such as guaranteeing the crank-connecting rod axle and lubricated accessory are not set in the aspirator, pump are constituted adverse effect yet.

The utility model is intended to improve the structure of strong self-suction sewage pump, makes it the life-span prolongation, for ease of maintenaince, and energy-conservation.

The utility model is to realize above-mentioned purpose like this: (referring to accompanying drawing)

This " strong self-suction sewage pump "., form by the centrifugal pump that holds together, aspirator, air-water separation ball and four parts of air pipe.

Used centrifugal pump is made up of axle impeller, the worm gear that has intake pipe and outlet pipe, axle, Sealing and gland thereof in this pump.The impeller that centrifugal pump adopts is the unshrouded impeller (1) that is equipped with some equalizing orifices (19), and the back shroud of impeller is provided with the clearance seal ring (18) that adopts wear-resisting gold to make, and impeller (1) connects with sliding matching mode with axle (3).On spiral case bonnet inwall, be fixed with circular metal plate one Balance disc (17), to regulate the axial width of impeller balance hole (19).Sealing and gland (12) thereof are contained in spiral case tail end inwall, in order to replacing.

Air-water separation ball (4) is contained in centrifugal pump intake pipe top, and is connected with intake pipe, in the chamber of air-water separation ball (4), a float valve (5) that the air-water separation ball top mouth of pipe is sealed, opens with the liquid level ascending, descending is housed.In the outlet pipe of pump, a unidirectional outlet valve (10) that seals is housed.

The aspirator of this pump, be by the dish type that the bottom is provided with one-way exhaust valve (8) actuate body body (20), with the involutory top of body be equipped with breather cheek valve (6) actuate body loam cake (21), be equipped with unidirectional short air valve (7) and with the aspirator inner chamber be separated into (A), (B) two spaces actuate body (9), with actuate the connecting rod (14) that body is connected and make aspirator to external world the seal ring of space sealing constitute.The transmission case of aspirator tightly joins mutually with the pump case bonnet, and the connecting rod of aspirator (14) is to be converted into reciprocating by eccentric bushing (15) and the crank (13) that links to each other with axle (3).The last caping mouth of sucking pipe device and air-water separation ball top mouth are to connect with air pipe (11).Be the cooling that makes crank, connecting rod and lubricated, go up at the axle (3) of crank end a gear shape disc (16) is installed; For make actuating of aspirator can conversion stroke, the eccentric bushing of one group of interchangeable different degree of eccentricity of this novel employing is so that select and change the eccentric bushing of the best degree of eccentricity according to set operating mode.

This accompanying drawing is the structural representation of strong self-suction sewage pump, wherein: 1-impeller, 2-spiral case, the 3-axle, 4-air-water separation ball, 5-float valve, the 6-one-way sucting valve, the unidirectional short air valve of 7-, 8-one-way exhaust valve, 9-actuates body, 10-one-way sealing outlet valve, 11-conduit, the 12-sealing gland, 13--crank, 14-connecting rod, the 15-eccentric bushing, the 16-disc, 17-Balance disc, 18-clearance seal ring, the 19-equalizing orifice, 20-actuates the body body, and 21-actuates the body loam cake, (A)-and the aspirator front space, (B)-the aspirator rear space, (C)-the impeller counter balance pocket.

Embodiment and effect:

Example: this pump designs by repeatedly calculating and revising, and has made optimum scheme and has been about to hand over factory to make.Check result of calculation: this pump self-priming height is not less than 8.1 meters, and lift is 22 meters, and flow is 420 meters ³/ hour.

Because the aspirator of this pump adopts the high sealing technology, under the effect of eccentric bushing that links to each other with axle and crank, the connecting rod that body links to each other is constantly reciprocating with actuating, make with actuate two cubic metres of seal containers that the body top cover is connected in gas extract out, reduce to 20-30m/mHg up to pressure, so this aspirator has the ability that water is drawn onto the height more than 9 meters under static state, for the higher water source of water level, then can be according to the high less eccentric bushing of the degree of eccentricity of changing of concrete suction, to reduce the connecting rod working stroke, cut down the consumption of energy.When under low pressure working, this aspirator power consumption is extremely low, almost is in no power consumption state.

The centrifugal pump of this pump, owing to taked unshrouded impeller, so have only the thrust on (right side) backward.Current (left side) face thrust increases, and (right side) moved behind the impeller, and impeller promptly enters the clearance seal state, and the counter balance pocket internal pressure increases; Make impeller (right side) when moving again backward if preceding (left side) surface pressure further increases, because of liquid is incompressible, the liquid pressure in the counter balance pocket increases to greater than preceding (left side) face hydraulic pressure and could discharge from equalizing orifice or gap, so impeller has self balancing ability.Set Balance disc, (right side) when moving, the axial width of impeller balance hole reduces backward when impeller, balances intracavity liquid and leaks and increased resistance, has further strengthened the ability of impeller automatically balancing axial force, thereby axial force is dropped to minimum.

Used air-water separation ball under the condition of lower end sealing, is connected test with the vacuum machine with this aspirator, can be extracted into 20-30m/mHg; When air-water separation ball lower linking tube in and be communicated with water, along with the ball internal pressure reduces, liquid level rises, when liquid level reached certain position, float valve was about to the sealing of push pipe mouth, makes pressure (by force) still maintain 20-30m/mHg.

Test and analyze as seen by above single file: this is suction formula sewage pump by force, has the characteristics of its engineering reliability and uniqueness really; Under current intelligence, it is guaranteed that its self-priming height is 8.1 meters.

Claims

1, a kind of strong self-suction sewage pump of forming by centrifugal pump, aspirator, moisture trap and air pipe that is connected as a single entity, it is characterized in that: the impeller that the centrifugal pump of this pump adopts, it is the unshrouded impeller that is equipped with some equalizing orifices, the back shroud of impeller is provided with the clearance seal ring made from antifriction metal (AFM), and impeller connects with sliding matching mode with axle; On spiral case back shroud inwall, be fixed with a circular metal plate " Balance disc " of regulating the impeller balance hole axial width, the air-water separation ball is contained in centrifugal pump intake pipe top, and be connected with intake pipe, be equipped with one with the liquid level liter in the air-water separation ball chamber, fall and the air-water separation ball top mouth of pipe is sealed, the float valve that opens, a unidirectional outlet valve that seals is housed in the outlet pipe of pump, aspirator is to actuate the body body by what be provided with one-way exhaust valve in the bottom, actuate the body loam cake with one-way sucting valve is equipped with at the involutory top of body, the body of actuating unidirectional short air valve and that the inner chamber of aspirator is separated into two spaces is housed, with actuate the connecting rod that body is connected, and the seal ring formation, connecting rod is to lean on the eccentric bushing and the crank that join with axle to be converted into again past moving, and the upward top mouth of aspirator and air-water separation ball push up mouth and be communicated with air pipe.

2, strong self-suction sewage pump according to claim 1 is characterized in that: the Sealing of the centrifugal pump of this pump and gland thereof are mounted in behind the centrifugal pump spiral casing on the bottom interior wall.

3, strong self-suction sewage pump according to claim 1 is characterized in that: described aspirator adopts the eccentric bushing of one group of different degree of eccentricity, so that change the connecting rod stroke according to different operating modes.

4, strong self-suction sewage pump according to claim 1 is characterized in that: on the axle of the driving crank end of described aspirator, a gear shape disc is housed.