CN211666931U

CN211666931U - Two-stage impeller seal-free self-priming pump water outlet volute structure and self-priming pump

Info

Publication number: CN211666931U
Application number: CN201922242140.0U
Authority: CN
Inventors: 安健; 毛永杰; 刘哲
Original assignee: Shenyang Kaiquan Petrochemical Pump Co ltd
Current assignee: Shenyang Kaiquan Petrochemical Pump Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-10-13
Anticipated expiration: 2029-12-13

Abstract

The utility model relates to a no sealed self priming pump technical field provides a two-stage impeller does not have sealed self priming pump and goes out water volute structure and self priming pump very much, goes out water volute structure and includes gas-liquid mixing chamber, one-level impeller, one-level volute, breakwater, second grade impeller, second grade volute and auxiliary impeller, and the breakwater is fixed in the one-level volute, has the gap of certain width between the inner wall of breakwater and one-level volute, sets up a plurality of water holes of crossing on the breakwater. The design of this novel breakwater can effectual messenger gas-liquid separation to more be favorable to the rotation of one-level volute interior liquid.

Description

Two-stage impeller seal-free self-priming pump water outlet volute structure and self-priming pump

Technical Field

The utility model relates to a sealless self priming pump technical field provides a two-stage impeller sealless self priming pump goes out water volute structure and self priming pump very much.

Background

The vertical sealless self-priming pump has the characteristic of one-time drainage and lifelong self-priming, and is widely applied to the fields of water treatment, sewage treatment of steel plants and chemical plants and the like. With the wide application, the requirement of a user on the lift of the pump is improved, so that the design of the two-stage impeller is realized. However, the existing self-priming pump with two-stage impeller generally has the following disadvantages:

firstly, the pump has long water self-absorption and water outlet time, and the gas in the suction pipeline cannot be discharged in a short time due to the poor gas-liquid separation effect of a first-stage volute chamber of the pump;

secondly, the flow lift of the pump has a larger difference compared with a single-stage pump, and one of the reasons is that the pressure of the second-stage volute chamber is 2 times that of the first-stage volute chamber, so that the back flow to the first-stage volute chamber exists in the gap between the back cover plate of the impeller and the shaft, and the flow and the lift are reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a two-stage impeller does not have sealed self priming pump and goes out water volute structure and self priming pump, the effectual wholeness ability that promotes the pump.

The utility model discloses a realize like this, provide a two-stage impeller does not have sealed self priming pump and goes out water volute structure, including gas-liquid mixing chamber, one-level impeller, one-level volute room, breakwater, second grade impeller, second grade volute room and auxiliary impeller, the breakwater is fixed in the one-level volute room, has the gap of certain width between the inner wall of breakwater and one-level volute room, sets up a plurality of water holes of crossing on the breakwater.

Furthermore, a rear cover plate of the secondary impeller is fixed on the upper side of the primary volute chamber, a sealing ring is fixedly arranged on the inner side, close to the shaft, of the rear cover plate, the sealing ring is a flexible sealing ring, and the sealing ring is in contact with a wear-resisting ring on the outer side of the shaft.

Furthermore, a compression ring is fixed on the rear cover plate, one end of the compression ring is fixed on the rear cover plate, and the other end of the compression ring is in contact with the sealing ring and is used for compressing the sealing ring.

Furthermore, the diameter of the water passing holes on the water baffle is 6-10mm, the distance between adjacent water passing holes is 4-5mm, and the thickness of the water baffle is 6 mm.

The utility model also provides an adopt the two-stage impeller of above-mentioned two-stage impeller sealless self priming pump to go out water volute structure to have sealed self priming pump.

Compared with the prior art, the utility model has the advantages of:

the design of at first breakwater can effectual messenger gas-liquid separation to more be favorable to the rotation of liquid in the one-level volute, secondly the design of sealing ring makes the backward flow of second grade volute between to the one-level volute significantly reduce, thereby has improved flow, lift and efficiency of pump on the unchangeable basis of former hydraulic pressure.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and embodiments:

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged view of the oval portion of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the utility model provides a two-stage impeller does not have sealed self priming pump and goes out water volute structure, including gas-liquid mixing chamber 1, one-level impeller 2, one-level volute 3, breakwater 4, second grade impeller 5, second grade volute 6 and auxiliary impeller 7, breakwater 4 fixes in one-level volute 3, has the gap of certain width between breakwater 4 and the inner wall of one-level volute 3, sets up a plurality of water holes of crossing on the breakwater 4.

When the two-pole impeller seal-free self-priming pump of the utility model is used, after liquid enters from the liquid inlet, the liquid is mixed with gas in the gas-liquid mixing chamber 1, then the gas-liquid mixing medium after being pressurized is discharged into the first-level volute chamber 3 through the first-level impeller 2, the liquid-liquid mixing medium discharged at high speed is disturbed through the impact of the water baffle 4, the gas-liquid separation is accelerated, the gas is discharged from the hole at the upper end of the first-level volute chamber 3 and enters the second-level volute chamber 6, one part of the gas is discharged from the gap at the upper side of the second-level volute chamber 6, one part of the gas is discharged from the spitting volute chamber 12 to the spitting pipeline, the liquid is discharged from the hole at the upper end of the first-level volute chamber 3 and enters the second-level volute chamber 6 after rotating at high speed in the first-level volute chamber 3, the liquid enters the suction inlet of the second-level impeller 5 from the second-level, the secondary impeller 7 at the upper end of the secondary volute chamber 6 rotates at high speed to generate centrifugal force on the liquid, so that the liquid in the secondary volute chamber 6 is sealed in the secondary volute chamber 6 and cannot leak outside the pump.

In order to prevent the liquid from flowing back from the secondary volute 6 to the primary volute 3, as an improvement of the technical scheme, a rear cover plate 8 of the secondary impeller 5 is fixed on the upper side of the primary volute 3, a sealing ring 10 is fixedly arranged on the inner side, close to a shaft 9, of the rear cover plate 8, the sealing ring 10 is a flexible sealing ring, and the sealing ring 10 is in contact with a wear-resistant ring on the outer side of the shaft 9.

After the liquid enters the area of the secondary impeller 5, the backflow of the secondary volute 6 to the primary volute 3 is reduced by 80 percent due to the arrangement of the sealing ring 10.

As a specific mode of fixing the sealing ring 10, a pressing ring 11 is fixed on the rear cover plate 8, and one end of the pressing ring 11 is fixed on the rear cover plate 8, and the other end thereof is in contact with the sealing ring 10 for pressing the sealing ring 10.

In order to better promote gas-liquid separation, on one hand, the liquid cannot be blocked from rotating in the primary volute chamber 3 too much, on the other hand, the blocking effect can be achieved, the gas-liquid mixed medium is vibrated, bubbles are separated from the liquid, the diameter of the water passing holes in the water baffle plate 4 is 6-10mm, the distance between every two adjacent water passing holes is 4-5mm, and the thickness of the water baffle plate 4 is 6 mm.

Adopt the utility model provides a two-stage impeller does not have sealed self priming pump of self priming pump volute chamber structure's two-stage impeller does not have sealed self priming pump, can have better gas-liquid separation effect to the backward flow of second grade volute chamber between to the one-level volute chamber significantly reduces, thereby has improved flow, lift and efficiency of pump on the unchangeable basis of former hydraulic pressure.

Claims

1. The utility model provides a two-stage impeller does not have sealed self priming pump and goes out water volute structure, a serial communication port, including gas-liquid mixing chamber (1), one-level impeller (2), one-level volute chamber (3), breakwater (4), second grade impeller (5), second grade volute chamber (6) and auxiliary impeller (7), breakwater (4) are fixed in one-level volute chamber (3), have the gap of certain width between the inner wall of breakwater (4) and one-level volute chamber (3), set up a plurality of water holes of crossing on breakwater (4).

2. The water outlet volute structure of the two-stage impeller sealless self-priming pump according to claim 1, characterized in that a back cover plate (8) of the two-stage impeller (5) is fixed on the upper side of the first-stage volute (3), a sealing ring (10) is fixedly arranged on the inner side of the back cover plate (8) close to the shaft (9), the sealing ring (10) is a flexible sealing ring, and the sealing ring (10) is in contact with a wear-resistant ring on the outer side of the shaft (9).

3. The two-stage impeller sealless self-priming pump outlet volute structure according to claim 2, characterized in that a compression ring (11) is fixed to said back cover plate (8), one end of the compression ring (11) being fixed to the back cover plate (8) and the other end being in contact with said sealing ring (10) for compressing the sealing ring (10).

4. The two-stage impeller sealless self-priming pump water outlet volute structure according to claim 1, characterized in that the diameter of the water passing holes on the water baffle (4) is 6-10mm, the distance between adjacent water passing holes is 4-5mm, and the thickness of the water baffle (4) is 6 mm.

5. A two-stage impeller sealless self-primer pump, characterized in that it employs the two-stage impeller sealless self-primer pump outlet volute structure of claim 1 or 2 or 3 or 4.