CN2413063Y - Vertical self-priming discharge pump - Google Patents

Abstract

The utility model relates to a vertical self-priming discharge pump, particularly a long axis centrifugal pump and a self-priming discharge pump which is composed of the long axis centrifugal pump and a getter device, wherein the getter device is driven by an eccentric driving sleeve which has key joint with a pump axis, and a gas inlet port of the getter device is communicated with the inner cavity of a unidirectional outlet valve of a long axis pump through an air suction pipe. The lower part of a diffuser casing of the long axis pump is closely connected with a water suntion pipe. The pump adopts a receded disk impeller with automatic balance axial force, therefore, the axial direction force is small. A top end mounting seat of an outlet bent housing seat is provided with a sealing pipe and a leaking sight pipe so as to provide conditions for ensuring sealing. The vertical self-priming discharge pump is provided with a bearing of an automatic self aligning ball on the upper part of the axis pump, a righting tile and a lubricating gear on the lower part so as to guarantee the vertical and smooth running of the pump axis.

Description

Vertical strong self-priming draining pump

The utility model relates to the well draining pump, relates in particular to the self-priming draining pump that is made of diaphragm suction means and centrifugal pump.

In the past, common well draining pump generally had deep-well submersible pump and shallow well major axis pump two classes.Because submersible pump need be immersed in the medium-term and long-term work of sewage, so technical requirementss such as its mechanical seal, electrical apparatus insulation performance, the pump housing are corrosion-resistant are high, its cost also is higher than with power major axis centrifugal pump, and maintenance difficult, be difficult to generally promote the use of, its application area only limits to the low discharge that must work under liquid level, the high-lift extraordinary occasion that needs.For shallow well, generally use the major axis centrifugal pump, though major axis centrifugal pump price is lower than submersible pump, because the torsion strength and the rigidity of its pump shaft all are limited by pump shaft length more, so the axial length of major axis pump is many below 8 meters, and should not make the high-lift draining pump of big flow; Above-mentioned two class pumps, in operation or when out of service, its pump housing all is immersed in the sewage, is subjected to the corrosion of liquid, has influenced working life on sizable degree.

In order to overcome above-mentioned shortcoming, I have proposed the design proposal of strong self-suction sewage pump, the horizontal strong self-suction sewage pump that this pump is made of the horizontal centrifugal pump that is connected as a single entity, suction means, moisture trap and air pipe (seeing 92209212.5 patents for details) in 92209212.5 patents.This horizontal strong self-suction sewage pump, the self-priming height is 8 meters, and its flow and lift all can design as required and be limited by axial length unlike the major axis pump, and this pump pump housing only contacts with liquid when work, when not moving, disengage, prolonged working life effectively.In addition, this pump is easy for installation, can reduce the civil engineering cost.But,, can not satisfy well depth and be the draining needs of large-scale culvert more than 8 meters, tunnel, bridge because the self-priming height of this pump is 8 meters.

The purpose of this utility model is, designing and make a kind of well depth that can be exclusively used in is vertical strong self-priming draining pump more than 8 meters, and it is big to make it to have the flow lift selectable range, and long service life, advantage such as be easy for installation and maintenance.

To achieve these goals, the design proposal of the utility model employing is as follows:

Vertical strong self-priming draining pump is connect mutually with pump shaft and is made of the suction means and the suction sleeve of a sealed attachment on the water inlet pump cover pipe of major axis pump lower end of its transmission by the major axis centrifugal pump of a motor or the transmission of diesel engine belt pulley, one; The outlet one-way valve inner chamber of the suction port of suction means and major axis pump end is linked by sucking pipe, outlet one-way valve inner chamber be equipped with by ball float or baffle plate and the lever that with it link vertical with current direction and be connected on that the plug of boom end constitutes suction means air intake cut-off valve.Details are as follows for its specific design:

This pump is by motor or diesel engine transmission, by elastic coupling flexible coupling or ball coupling moment reached to be vertical to the major axis pump pump shaft of installing; Be connected to the eccentric gearing cover in this top key, and actuate body to the suction means that crank and connecting rod transmission are contained in sidepiece by the level that connects with it, suction means is made of the body of actuating of actuating body body inside cover, become involutory center that the external side cover of actuating of one-way sucting valve is housed with the body inside cover and unidirectional short air valve being housed that has one-way exhaust valve, actuate body and the suction means inner chamber is separated into two spaces and connects mutually, connecting rod and actuate and be provided with seal ring (seeing patent 92209212.5 for details) between the body body inside cover with connecting rod; Suction means is finished air-breathing work by the to-and-fro motion of actuating body.The air-breathing inlet of suction means is connected to sucking pipe, and by air-breathing joint be contained in the outlet one-way valve inner chamber UNICOM of the Discharging bent-tube seat end of pump, air-breathing joint inlet downside is provided with the cut-off valve that plate washer and the lever that links with it that hangs down by ball float or with current direction and the plug that is connected on rod end constitute.Described major axis pump comprises the pump shaft, the Discharging bent-tube seat that join with motor, is connected on the outlet one-way valve of bend pipe seat outlet, is connected on pump barrel (being that water outlet is taken over), pump case, impeller and the water filter of bend pipe seat lower end successively.Characteristics of the present utility model are: the impeller that this pump adopts is the receded disk impeller (seeing ZL89216394.1 for details) of automatically balancing axial force, the ratio of the back shroud outlet ring internal diameter of this impeller and front shroud import ring internal diameter is greater than 1, and optimum ratio is 1.2～1.25; Impeller is provided with the mechanism that reduces leakage rate and improve impeller hydraulic pressure suspendability, and the structure of this mechanism has following three kinds: 1. an internal diameter is installed less than the seal ring back choma and become sliding contact with the back choma on blower inlet casing or pump cover; 2. on the back shroud of impeller flange end face and contract the back the flange thrust surface of blower inlet casing (or pump cover) on, fix a throttling dish that is parallel to each other respectively and make that the crack is mutually increase and decrease between this two throttlings dish; 3. choma is provided with a labyrinth seal ring nearby or sets up the blade of paying of several radials at the back shroud of impeller root behind impeller; This impeller is slidably to be connected on the pump shaft.The top, Discharging bent-tube seat center of existing major axis pump, the fitting seat of installation tool Sealing and thrust bearing in all being provided with; The characteristics of this pump are, are provided with mechanical seal and rubber framework grease seal in this fitting seat, are connected to one and the inner observation tube that leaks that communicates on the fitting seat wall at mechanical seal and the place, connecting part of rubber framework grease seal; The bearing on described pump shaft top is the self-aligning ball bearing, is provided with the centrilizing tile that is inlaid on the blower inlet casing between lower end pump shaft and blower inlet casing, to reduce the interference of external radial force, guarantees the vertical and smooth running of pump shaft.For guaranteeing to lubricate, be provided with a repairing pipe that joins with lubricating cup at the centrilizing tile sidepiece; Change sealing or hold axle etc. easy to maintenance for making, aforementioned eccentric gearing cover middle part is provided with screw thread with the endoporus that pump shaft joins and makes it and is spirally connected and becomes keyed jointing with pump shaft is existing.For making integral installation and easy to maintenance, Discharging bent-tube seat, suction means and motor are installed in respectively on the frame that is made of vertical hitch and horizontal tie-plate, be effectively.

For more clearly illustrating design proposal of the present utility model and its characteristics, as follows with the accompanying drawing contrast in conjunction with the embodiments now:

Fig. 1-existing major axis pump scheme of installation, wherein:

1 '-motor, 2 '-coupling, 3 '-outlet bend pipe seat, 4 '-the outlet gate valve, 5 '-outlet pipe, 6 '-pump barrel, 7 '-pump shaft, 8 '-jack shaft, 9 '-centrilizing tile,, 10 '-pump case, 11 '-impeller, 12 '-water filter.

The structural representation of the vertical strong self-priming draining pump of Fig. 2-the utility model.

1-motor, 2-coupling, 3-outlet bend pipe seat, 4-outlet one-way valve, 5-outlet pipe, 6-pump barrel, 7-pump shaft, 9-centrilizing tile, 10-pump case, 11-impeller, 12-water filter, 13-suction sleeve, 14-suction means, 15-sucking pipe, 16-eccentric gearing cover, 17-crank, 18-connecting rod, 19-self-aligning ball bearing, 21,21 '-oil seal cover, 22-oil pipe, 23-oil ring, 24-mechanical seal, 25-rubber framework grease seal, 26-gland, 28-bearing support, 29-profit observation tube, 30-tie-plate, 31-hitch.

Behind pump startup, motor 1 promptly passes through coupling 2 with moment transmission pump shaft 7, makes impeller 11 rotations; Incipient stage, owing to do not have water in the pump case, the major axis centrifugal pump becomes idling conditions.At the same time, the eccentric gearing cover 16 that is contained in pump shaft 7 tops is made eccentric rotary, and actuates body by crank 17 connecting rods 18 drives that connect with it and make level to to-and-fro motion, and is constantly air-breathing.Owing to be connected to sucking pipe 15 between the inner chamber of the suction port of suction means 14 and outlet one-way valve 4, so Discharging bent-tube seat 3 that communicates with it, pump barrel 6, pump case (blower inlet casing) 10 and suction sleeve 13 inner chambers all become negative pressure state, the sewage that is in atmospheric pressure state is sucked water pipe 13 by water filter 12, and be full of pump case 10.At this moment, major axis centrifugal pump impeller 11 promptly throws away the water in the pump case 10, and discharges by pump barrel 6, Discharging bent-tube seat 3, outlet one-way valve 4 and outlet pipe 5 successively.Be arranged on suction means 14 the air intake front port, by the cut-off valve of ball float control, can when water is full of outlet one-way valve 4, sealing air intake, anti-sealing enter suction means.Because this pump has adopted the receded disk impeller of automatically balancing axial force, greatly reduce axial force, so the available self-aligning ball bearing 19 of the thrust bearing axle on the pump shaft substitutes, this ball bearing 19 has guaranteed that with centrilizing tile 9 on being contained in blower inlet casing (pump case) height of pump shaft is vertical, be located at the oil pipe 22 centrilizing tile sidepiece, that communicate with lubricating cup 23 and guaranteed lubricating between pump shaft and centrilizing tile, the upper and lower oil seal cover 21 and 21 that the place, centrilizing tile top and the bottom of blower inlet casing is provided with ' can prevent or reduce the infiltration of water and the leakage of oil.Because the sealing and the Bearing Installation seat at Discharging bent-tube seat 3 tops, adopted stair-stepping coaxial package formula structure, the fitting seat external diameter minimum of mechanical seal 24 of its underpart and rubber framework grease seal 25, the cap external diameter of its gland 26 is less than or equal to the external diameter of the bearing support 28 that holds bearing 19, so the mounting or dismounting maintenance is very convenient.The observation tube 29 that leaks can in time be understood the sealing part abrasion situation, so that in time change component.The Discharging bent-tube seat 3 of this vertical strong self-priming draining pump, getter device 14 with and accessory be installed in together by level on the frame that tie-plate 30 and vertical hitch 31 constitute, very favourable to overall installation.

The advantage of this pump is: 1. under same condition, the pump shaft axial length of this pump can be than major axis is arranged Pump shortens 1-8 meters, so the range of choice of its design discharge and lift is big; 2. the impeller of this pump and water conservancy diversion Contact with water when shell only has work, disengage when not working, greatly reduce the corrosion when soaking, Make life; 3. easy to installation and maintenance; 4. cost is lower than the same specification long-shaft pump; 5. the scope of application Extensively.

Claims (5)

1, a kind of vertical strong self-priming draining pump, be made of centrifugal pump, suction means, sucking pipe and suction sleeve, it is characterized in that: it is to be connect mutually with pump shaft and be made of the suction means and the suction sleeve of a sealed attachment on the water inlet pump cover pipe of major axis pump lower end of its transmission by a major axis centrifugal pump, one.The outlet one-way valve inner chamber of the suction port of suction means and major axis pump end is linked by sucking pipe, is equipped with by ball float and the lever that links with it and is connected on the suction means air intake cut-off valve that the plug of boom end constitutes at outlet one-way valve inner chamber.

2, vertical strong self-priming draining pump according to claim 1 is characterized in that the impeller of described major axis pump is the receded disk impeller of automatically balancing axial force, and impeller is slidably to be connected on the pump shaft.

3, vertical strong self-priming draining pump according to claim 1, it is characterized in that, the pump shaft of described major axis pump, its top is provided with the self-aligning ball bearing, the eccentric gearing cover that be equipped with its end becomes keyed jointing with pump shaft, be provided with centrilizing tile between its lower end and the blower inlet casing, this is set upright sidepiece and is provided with the repairing pipe that joins with lubricating cup, and the top and the bottom that blower inlet casing is installed centrilizing tile are provided with upper and lower oil seal cover respectively.

According to claim 1 or 3 described vertical strong self-priming draining pumps, it is characterized in that 4, the endoporus that described eccentric gearing cover middle part one pump shaft joins is provided with screw thread and is spirally connected and becomes keyed jointing with pump shaft is existing.

5, vertical strong self-priming draining pump according to claim 1 and 2, it is characterized in that, the fitting seat at described Discharging bent-tube seat top is connected to an observation tube that leaks that communicates with inside on the fitting seat wall at the place, joining portion of mechanical seal that is provided with and rubber framework grease seal.

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