CN211009118U

CN211009118U - Cold and hot water self-priming pump

Info

Publication number: CN211009118U
Application number: CN201922090891.5U
Authority: CN
Inventors: 赵福增
Original assignee: Zhejiang Qiantao Pump Co ltd
Current assignee: Zhejiang Qiantao Pump Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-07-14
Anticipated expiration: 2029-11-28

Abstract

The utility model provides a hot and cold water self priming pump belongs to fluid machinery technical field. The self-priming pump solves the problems that the sealing performance of the existing self-priming pump is very easy to reduce when the sealing structure is in a constantly-changed cold and hot state due to the very large temperature change range of a conveying medium, and the aging speed is greatly accelerated and damaged. This hot and cold water self priming pump, including motor, pump head and the spiral case that mutually supported set up, the pivot of motor stretches into in the pump head and has linked firmly the transmission cover at the tip, clearance fit between transmission cover and the pump head inner wall, and the inside of this transmission cover is fixed with the adapter sleeve, and the center of adapter sleeve has linked firmly the countershaft, and the countershaft stretches into in the spiral case and installs centrifugal impeller at the tip. The utility model discloses the pivot of motor not with carry medium direct contact, the influence of the transport medium that has effectively prevented temperature frequent change to sealing device on the motor makes its life longer.

Description

Cold and hot water self-priming pump

Technical Field

The utility model belongs to the technical field of fluid machinery, a water pump, in particular to hot and cold water self priming pump is related to.

Background

The self priming pump is a centrifugal pump that need not be filled with water in the suction line and just can be automatic to water uptake up, the motor shaft all can with the liquid direct contact of carrying behind the installation impeller among the pump head structure of present self priming pump, inside the sealed effect of shaft seal device such as rethread installation mechanical seal realized preventing liquid to get into the motor, this kind of structure of problem is not had to the transport of conventional liquid, but in the transport of hot and cold water, because the temperature variation range of transport medium is very big, its sealing performance of seal structure is in the cold and hot state of continuous transform descends very easily, and ageing speed accelerates greatly and damages, and the damage of seal structure can lead to the motor to intake and bring a series of problems such as electric leakage unit short circuit.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a make motor shaft and the direct longer hot and cold water self priming pump of whole security performance of keeping apart of transport medium.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a hot and cold water self priming pump, includes motor, pump head and the spiral case that mutually supports and set up, its characterized in that, the pivot of motor stretches into in the pump head and has linked firmly the transmission cover at the tip, transmission cover and pump head inner wall between clearance fit, the inside of this transmission cover is fixed with the adapter sleeve, the center of adapter sleeve has linked firmly the countershaft, the countershaft stretch into in the spiral case and install centrifugal impeller at the tip.

In the cold and hot water self-priming pump, the connecting sleeve is fixedly connected with a balance block inside, and the balance block is sleeved outside the auxiliary shaft and connected through a flat key.

In the cold and hot water self-priming pump, a sealing ring is arranged between the balance block and the auxiliary shaft, and one end of the sealing ring is abutted against the volute through a sealing gasket.

In the cold and hot water self-priming pump, the volute and the pump head are connected through the cover plate, the cover plate is provided with a circle of annular groove, the axial protrusion at the rear part of the impeller forms a circle of limiting step matched with the annular groove, and the limiting step is clamped in the annular groove.

In the cold and hot water self-priming pump, a cavity structure is arranged between the transmission sleeve and the connecting sleeve and is clamped, matched and fixed through a key groove.

Compared with the prior art, the rotating shaft of the self-priming pump motor is connected with the transmission sleeve to realize the transmission of torque force, and the torque force is transmitted to the impeller through the transmission sleeve, the connecting sleeve and the auxiliary shaft in sequence, so that the rotating shaft of the motor is not in direct contact with a conveying medium, the influence of the conveying medium with frequent temperature change on the sealing device on the motor is effectively prevented, and the service life of the sealing device is longer.

Drawings

Fig. 1 is a structural sectional view of the self-priming pump of the present invention.

In the figure, 1, a motor; 2. a pump head; 3. a volute; 4. a transmission sleeve; 5. connecting sleeves; 6. a counter shaft; 7. an impeller; 8. a counterbalance; 9. a seal ring; 10. sealing gaskets; 11. a cover plate; 12. and a limiting step.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the cold and hot water self-priming pump comprises a motor 1, a pump head 2 and a volute 3 which are matched with each other, wherein a rotating shaft of the motor 1 extends into the pump head 2 and is fixedly connected with a transmission sleeve 4 at the end part, the torque force of the motor 1 is directly transmitted to the transmission sleeve 4, the transmission sleeve 4 is in clearance fit with the inner wall of the pump head 2, the contact gap between the transmission sleeve 4 and the inner wall of the pump head 2 is long, a certain sealing effect can be achieved, liquid entering the position cannot easily reach the motor 1, a connecting sleeve 5 is fixed inside the transmission sleeve 4, an auxiliary shaft 6 is fixedly connected with the center of the connecting sleeve 5, the auxiliary shaft 6 extends into the volute 3 and is provided with a centrifugal impeller 7 at the end part, the torque force is transmitted to the impeller 7 through the transmission sleeve 4, the connecting sleeve 5 and the auxiliary shaft 6, and.

Furthermore, the inside of adapter sleeve 5 has linked firmly balancing piece 8, and this balancing piece 8 cover is located countershaft 6 and is connected through flat key outward, because countershaft 6 rocks easily for shaft-like structure when its length overlength, can play the effect of supporting fixed countershaft 6 through setting up of balancing piece 8 to it is more stable to drive countershaft 6 synchronous revolution messenger's operation.

Further, a sealing ring 9 is arranged between the balance block 8 and the auxiliary shaft 6, one end of the sealing ring 9 abuts against the volute 3 through a sealing gasket 10, and the auxiliary shaft 6, the pump head 2 and the impeller 7 are sealed through the matching of the sealing ring 9 and the sealing gasket 10.

Further, in order to make the rotation of the impeller 7 more stable, the volute 3 is connected with the pump head 2 through the cover plate 11, the cover plate 11 is provided with a circle of annular groove, the rear axial projection of the impeller 7 forms a circle of limit step 12 matched with the annular groove, the limit step 12 is clamped in the annular groove, the structure of the impeller 7 is firmer through the structure, the deformation of the external blade of the impeller 7 is prevented, and the cover plate 11 and the volute 3 can be formed separately through the structure, so that the annular groove at the milling position inside the cover plate is facilitated.

Furthermore, there is the cavity structure between transmission sleeve 4 and the adapter sleeve 5 and establish the cooperation through the keyway type card and fix, because the area of contact of each inside part of pump head 2 is all great, can reduce thermal transmission through the setting of this cavity structure, prevent that the motor 1 pivot from producing the change because of the change of transport medium temperature.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the motor 1, the pump head 2, the volute 3, the driving sleeve 4, the connecting sleeve 5, the auxiliary shaft 6, the impeller 7, the balance weight 8, the sealing ring 9, the sealing gasket 10, the cover plate 11, the limit step 12, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a hot and cold water self priming pump, includes motor (1), pump head (2) and spiral case (3) that mutually support and set up, its characterized in that, the pivot of motor (1) stretches into in pump head (2) and has linked firmly drive sleeve (4) at the tip, drive sleeve (4) and pump head (2) inner wall between clearance fit, the inside of this drive sleeve (4) is fixed with adapter sleeve (5), the center of adapter sleeve (5) has linked firmly countershaft (6), countershaft (6) stretch into in spiral case (3) and install centrifugal impeller (7) at the tip.

2. A cold and hot water self-priming pump as claimed in claim 1, wherein the connecting sleeve (5) is fixedly connected with a balance weight (8) inside, and the balance weight (8) is sleeved outside the auxiliary shaft (6) and connected by a flat key.

3. A hot and cold water self-priming pump according to claim 2, characterized in that a sealing ring (9) is provided between the counterweight (8) and the auxiliary shaft (6), and one end of the sealing ring (9) abuts against the volute (3) through a sealing gasket (10).

4. A self-priming pump for cold and hot water according to claim 1, wherein the volute (3) is connected with the pump head (2) through a cover plate (11), the cover plate (11) is provided with a ring of annular groove, the rear axial projection of the impeller (7) forms a ring of limit step (12) which is matched with the annular groove, and the limit step (12) is clamped in the annular groove.

5. A hot and cold water self-primer pump according to claim 1, wherein a cavity structure is formed between the driving sleeve (4) and the connecting sleeve (5) and is fixed by a key groove type clamping fit.