CN219282050U - Vertical inclined flow pump for preventing muddy sand - Google Patents

Abstract

The utility model discloses a vertical inclined flow pump for preventing muddy sand, which comprises a suction horn mouth, an outer connecting pipe, an impeller chamber, an impeller, a guide vane body, an inner protecting pipe and a pump shaft, wherein a circle of sand collecting grooves are formed in the inner protecting pipe and on a guide bearing seat flange which is in supporting connection with the pump shaft, a plurality of through first sand discharging holes are formed in the sand collecting grooves at intervals, a circle of sand collecting grooves are also formed in a lower guide bearing support flange of the guide vane body, a plurality of through second sand discharging holes are formed in the sand collecting grooves at intervals, and a third sand discharging hole is formed in the bottom of an impeller cover plate. By adopting the technical scheme, the utility model can reduce the sediment accumulation to a large extent, prolongs the service life of key vulnerable parts of the water pump such as the guide bearing, the shaft sleeve, the sealing ring and the like, and reduces the maintenance difficulty caused by the sediment accumulation; with the lower processing cost of structural only, alright effective maintenance cost who reduces the water pump later stage has the economic nature height, and the practicality is strong, but wide application's characteristics.

Description

Vertical inclined flow pump for preventing muddy sand

Technical Field

The utility model relates to the field of vertical diagonal flow pumps, in particular to a vertical diagonal flow pump for preventing muddy sand.

Background

The vertical diagonal flow pump has the characteristics of small occupied area, large flow, large caliber, low civil engineering cost, simple maintenance and the like, is widely applied to large thermal power stations and nuclear power stations as circulating water pumps, and is used as metallurgical, urban and farmland water supply and drainage and industrial and mining engineering pumps for conveying clear water, rainwater, sewage and seawater below 55 ℃. From the feedback of clients, the conventional vertical diagonal flow pump has long service life in the environment with smaller sand content of clear water and rainwater, long overhaul period and less overhaul workload, but the abrasion of the shaft sleeve and the guide bearing is obvious in the medium environments of river water (yellow river basin), sewage, seawater and the like with large sand content, the sand accumulation of the cylinder body and the protective tube is serious, the overhaul period and the service life are short, the overhaul difficulty is increased, and the overhaul cost is high. The reasons for this generally include: on one hand, when the water pump runs in a muddy sand environment, muddy sand can rise into the cylinder along with water flow, and after the water pump is stopped, the muddy sand is deposited under the lower outer connecting pipe due to dead weight and water flow sinking; on the other hand, the external industrial lubrication water has sand content and also enters the protective tube, if the external industrial lubrication water is lubricated by medium water, the muddy sand enters the protective tube along with the gap of the guide bearing and the water tank, most of the muddy sand can be deposited on the guide bearing and the bearing seat after the machine is stopped, and after the water pump runs for a period of time, the muddy sand is deposited seriously, so that the shaft sleeve and the guide bearing are worn, and the safety of the water pump is endangered.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides the vertical inclined flow pump capable of preventing the muddy sand in the muddy sand environment, which can effectively avoid the accumulation of the muddy sand by adopting sand prevention and sand discharge measures, protect the shaft sleeve and the guide bearing and effectively reduce the maintenance cost of the water pump in the later period.

The technical scheme adopted by the utility model is as follows: the utility model provides a prevent vertical diagonal flow pump of silt particle, is including inhaling horn mouth, takeover, impeller room, impeller, the stator body, interior pillar, pump shaft, in interior pillar, set up the round sand trap on the guide bearing seat flange that interior pillar and pump shaft support are connected the interval is provided with a plurality of first sand discharge holes that link up in the sand trap, also set up the round sand trap on the lower guide bearing support flange of the stator body the interval is provided with a plurality of second sand discharge holes that link up in the sand trap, sets up the third sand discharge hole in impeller apron bottom.

Further, the sand collecting groove is a circle of shallow groove with an inverted trapezoid cross section.

Further, a fourth sand discharge hole is arranged at the bottom of the impeller chamber at a position corresponding to the impeller sealing ring.

Further, a fifth sand discharge hole is arranged at the bottom of the outer connecting pipe.

According to the utility model, the sand collecting groove and the sand discharging hole are formed in the guide bearing seat flange which is connected with the inner protection pipe and the pump shaft support, the sand is discharged to the guide vane body from top to bottom by means of dead weight of the sand and running water during shutdown, so that the sand is prevented from being deposited at the matching position of the guide bearing and the shaft sleeve, the abrasion of the upper guide bearing, the middle guide bearing and the shaft sleeve is effectively reduced, the sand collecting groove and the sand discharging hole are formed in the lower guide bearing support flange of the guide vane body, the sand is guided to be discharged to the impeller after shutdown, the local deposition of the sand is prevented, the abrasion of the lower guide bearing and the shaft sleeve is effectively reduced, the sand discharging hole is formed in the bottom of the impeller cover plate, part of axial force can be balanced during operation, and the sand can be discharged along with the water flow during shutdown; the bottom of the impeller chamber is provided with a sand discharge hole, so that sand accumulation at the impeller chamber and the impeller sealing ring can be reduced, and the wear of the impeller sealing ring caused by sand is protected; the bottom of the outer connecting pipe is provided with a sand discharging hole, so that sand accumulation at the bottom of the shell can be reduced.

By adopting the technical scheme, the utility model can reduce the sediment accumulation to a large extent, prolongs the service life of key vulnerable parts of the water pump such as the guide bearing, the shaft sleeve, the sealing ring and the like, and reduces the maintenance difficulty caused by the sediment accumulation; with the lower processing cost of structural only, alright effective maintenance cost who reduces the water pump later stage has the economic nature height, and the practicality is strong, but wide application's characteristics.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is an enlarged schematic view of a portion of fig. 1 at a.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

As shown in fig. 1 and 2, the vertical oblique flow pump for preventing silt and sand of this embodiment includes a suction bell mouth 1, an external connection pipe 2, an impeller chamber 3, an impeller 4, a guide vane body 5, an inner protection pipe 7, and a pump shaft 6, wherein a circle of sand collecting grooves are formed in the inner protection pipe 7 and on a flange of a bearing seat 8 which is in supporting connection with the pump shaft 6, a plurality of through first sand discharging holes 9 are formed in the sand collecting grooves at intervals, a circle of sand collecting grooves are also formed in a lower bearing supporting flange 11 of the guide vane body 5, a plurality of through second sand discharging holes 10 are formed in the sand collecting grooves at intervals, and a third sand discharging hole 12 is formed in the bottom of a cover plate of the impeller. A fourth sand discharge hole 13 is arranged at the bottom of the impeller chamber 3 at a position corresponding to the impeller sealing ring. A fifth sand discharge hole 14 is provided at the bottom of the outer tube 2.

In this embodiment, the sand collecting groove is a circle of shallow grooves with inverted trapezoid cross sections, so that sediment can be conveniently gathered and then guided out from the sand discharging holes.

According to the utility model, the sand collecting groove and the sand discharging hole are formed in the guide bearing seat flange which is connected with the inner protection pipe and the pump shaft support, the sand is discharged to the guide vane body from top to bottom by means of dead weight of the sand and running water during shutdown, so that the sand is prevented from being deposited at the matching position of the guide bearing and the shaft sleeve, the abrasion of the upper guide bearing, the middle guide bearing and the shaft sleeve is effectively reduced, the sand collecting groove and the sand discharging hole are formed in the lower guide bearing support flange of the guide vane body, the sand is guided to be discharged to the impeller after shutdown, the local deposition of the sand is prevented, the abrasion of the lower guide bearing and the shaft sleeve is effectively reduced, the sand discharging hole is formed in the bottom of the impeller cover plate, part of axial force can be balanced during operation, and the sand can be discharged along with the water flow during shutdown; the bottom of the impeller chamber is provided with a sand discharge hole, so that sand accumulation at the impeller chamber and the impeller sealing ring can be reduced, and the wear of the impeller sealing ring caused by sand is protected; the bottom of the outer connecting pipe is provided with a sand discharging hole, so that sand accumulation at the bottom of the shell can be reduced.

Many modifications and other embodiments of the utility model will come to mind to one skilled in the art to which this utility model pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the utility models are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (4)

1. The utility model provides a prevent vertical diagonal flow pump of silt particle, is including inhaling horn mouth (1), outer pipe (2), impeller room (3), impeller (4), stator body (5), interior pillar (7), pump shaft (6), its characterized in that: a circle of sand collecting grooves are formed in the inner protective tube (7) and on a flange of a guide bearing seat (8) which is in supporting connection with the pump shaft (6), a plurality of through first sand discharging holes (9) are formed in the sand collecting grooves at intervals, a circle of sand collecting grooves are also formed in a lower guide bearing supporting flange (11) of the guide vane body (5), a plurality of through second sand discharging holes (10) are formed in the sand collecting grooves at intervals, and a third sand discharging hole (12) is formed in the bottom of the impeller cover plate.

2. A vertical pump for preventing muddy sand according to claim 1, characterized in that: the sand collecting groove is a circle of shallow groove with an inverted trapezoid cross section.

3. A vertical pump for preventing muddy sand according to claim 1, characterized in that: a fourth sand discharge hole (13) is arranged at the bottom of the impeller chamber (3) at a position corresponding to the impeller sealing ring.

4. A vertical pump for preventing muddy sand according to claim 1, characterized in that: a fifth sand discharge hole (14) is arranged at the bottom of the outer joint pipe (2).

Images