CN214533687U

CN214533687U - Shaft head interlocking structure for fixed impeller of sewage pump

Info

Publication number: CN214533687U
Application number: CN202023264055.3U
Authority: CN
Inventors: 周跃; 李晶晶; 张锡淼
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-29
Anticipated expiration: 2030-12-30

Abstract

The utility model relates to a fixed for impeller spindle nose interlocking structure of dredge pump, including impeller, impeller clamp plate, key, axle, its characterized in that: the impeller suit is epaxial, has key and impeller radial fixation epaxial, and the impeller clamp plate is twisted by interior hex bolts and is connect on the top of axle, has the spring gasket below the interior hex bolts, the impeller clamp plate be provided with 2 breachs in excircle department, breach symmetric distribution on the excircle, locate to set up slottedly in impeller clamp plate, the inslot is inlayed and is had the nylon piece, the interior round department of impeller clamp plate is provided with the internal thread, the internal thread of impeller clamp plate is the levogyration internal thread, the top face of axle on seted up central internal thread hole, be provided with the levogyration external screw thread in the top outside of axle, the levogyration external thread in the top outside of axle is relative with the levogyration internal thread of impeller clamp plate, the utility model has the advantages of levogyration internal thread impeller clamp plate and modified interior hex bolts. Impeller clamp plate and socket head cap screw all imbed the nylon piece, and the nylon piece has very strong locking effect.

Description

Shaft head interlocking structure for fixed impeller of sewage pump

Technical Field

The utility model relates to an interlocking structure, especially a spindle nose interlocking structure for fixed impeller of dredge pump.

Background

At present, in municipal pipelines for urban construction, a large number of sewage pumps are used, the shaft heads of the sewage pumps are usually used for locking impellers by using hexagon socket head screws, and in the figure I, the impeller 21, the impeller 22, a key 23, a shaft 24, a hexagon socket head screw 25 and a standard spring washer 26 are shown in the figure I. But because pipeline water flows backward after shutting down leads to the water pump impeller reversal, and the hexagon socket head cap screw in the axial head fastener drops easily during the impeller reversal, leads to the dredge pump to break down to need maintain, if meet flood season and will lead to urban ponding, consequently need treat to come the lock solid impeller to improve to the hexagon socket head cap screw for the dredge pump, in order to improve the reliability of dredge pump operation.

Disclosure of Invention

The utility model aims at solving the above problem that the common hexagon socket head cap screw of spindle nose of dredge pump comes the lock solid impeller to exist among the prior art, provide a fixed spindle nose interlocking structure for impeller of dredge pump. The utility model relates to a fixed for impeller spindle nose interlocking structure of dredge pump, including impeller, impeller clamp plate, key, axle, its characterized in that: the impeller is sleeved on the shaft, the shaft is provided with a key to be fixed with the impeller in the radial direction, the impeller pressure plate is screwed on the top end of the shaft by an inner hexagon screw, a spring gasket is arranged below the inner hexagon screw, the impeller pressure plate is provided with 2 notches at the excircle, the notches are symmetrically distributed on the excircle, a groove is arranged at the inner circle of the impeller pressing plate, a nylon block is embedded in the groove, an internal thread is arranged at the inner circle of the impeller pressing plate, the internal thread of the impeller pressing plate is a left-hand internal thread, a central internal thread hole is arranged on the top end surface of the shaft, the outer side of the top of the shaft is provided with a left-handed external thread, the left-handed external thread on the outer side of the top of the shaft is opposite to the left-handed internal thread of the impeller pressure plate, the top of the thread of the socket head cap screw is provided with a small gap, the nylon block is arranged in the small gap, and the nylon block in the small gap of the inner hexagon screw is opposite to the thread of the central internal thread hole on the top end surface of the shaft. The utility model has the advantages that set up the internal screw thread impeller clamp plate of levogyration, set up purpose-built hexagon socket head cap screw simultaneously. The impeller pressing plate and the special inner hexagon screw are both embedded into the nylon block, and the nylon block has a strong locking effect.

Drawings

FIG. 1 is a cross-sectional view of a prior art structure.

Fig. 2 is a structural section view of the present invention.

Fig. 3 is a structural plan view of the impeller pressing plate of the present invention.

Fig. 4 is a schematic structural view of the shaft of the present invention.

Fig. 5 is a schematic structural view of the socket head cap screw of the present invention.

Detailed Description

A kind of dredge pump fixes the axle head interlocking structure for impeller in the figure, including impeller 1, impeller clamp plate 2, key 3, axle 4, its characterized in that: the impeller is sleeved on the shaft, the shaft is provided with a key to be fixed with the impeller in the radial direction, the impeller pressure plate is screwed on the top end of the shaft by an inner hexagon screw 5, a spring gasket 6 is arranged below the inner hexagon screw, the impeller pressure plate is provided with 2 gaps 7 on the excircle, the gaps are symmetrically distributed on the excircle, a groove 8 is arranged at the inner circle of the impeller pressure plate, a nylon block 9 is embedded in the groove, an internal thread 10 is arranged at the inner circle of the impeller pressure plate, the internal thread of the impeller pressure plate is a left-hand internal thread, a central internal thread hole 11 is arranged on the top end surface of the shaft, a left-hand external thread 12 is arranged on the outer side of the top of the shaft, the left-hand external thread on the outer side of the top of the shaft is opposite to the left-hand internal thread of the impeller pressure plate, a key groove 13 is arranged on the shaft, a small notch 14 is arranged at the top of the thread of the inner hexagon screw 5, the nylon block 15 is arranged in the small gap, and the nylon block in the small gap of the socket head cap screw is opposite to the thread of the central internal thread hole on the top end surface of the shaft.

Because the utility model discloses set up the internal screw thread impeller clamp plate of levogyration, set up the allen key screw after the improvement simultaneously (the top sets up little breach). Impeller clamp plate and modified socket head cap screw all imbed the nylon piece, and the nylon piece has very strong locking effect.

During normal operation, the impeller rotates anticlockwise when viewed from the suction inlet of the impeller, and the right-hand thread plays a fastening role. In the abnormal operation (reverse rotation), the left-hand screw thread is tightened by rotating clockwise as viewed from the impeller suction port. The nylon block plays a role in stopping when the nylon block is abnormally operated (reversely rotated).

Therefore, the improved socket head cap screw serves a primary tightening function during normal operation. During abnormal operation (reverse rotation), the impeller pressure plate plays a main fastening role. The shaft head interlocking structure for fixing the impeller can effectively prevent the impeller from falling off no matter the impeller rotates positively or negatively.

Claims

1. The utility model provides a fixed for impeller spindle nose interlocking structure of dredge pump, includes impeller, impeller clamp plate, key, axle, its characterized in that: the impeller is sleeved on the shaft, the shaft is provided with a key to be fixed with the impeller in the radial direction, the impeller pressure plate is screwed on the top end of the shaft by an inner hexagon screw, a spring gasket is arranged below the inner hexagon screw, the impeller pressure plate is provided with 2 notches at the excircle, the notches are symmetrically distributed on the excircle, a groove is arranged at the inner circle of the impeller pressing plate, a nylon block is embedded in the groove, an internal thread is arranged at the inner circle of the impeller pressing plate, the internal thread of the impeller pressing plate is a left-hand internal thread, a central internal thread hole is arranged on the top end surface of the shaft, the outer side of the top of the shaft is provided with a left-handed external thread, the left-handed external thread on the outer side of the top of the shaft is opposite to the left-handed internal thread of the impeller pressure plate, the top of the thread of the socket head cap screw is provided with a small gap, the nylon block is arranged in the small gap, and the nylon block in the small gap of the inner hexagon screw is opposite to the thread of the central internal thread hole on the top end surface of the shaft.