CN213870297U

CN213870297U - Multistage centrifugal pump

Info

Publication number: CN213870297U
Application number: CN202022419010.2U
Authority: CN
Inventors: 徐林庆; 王银
Original assignee: Nanjing Huaming Energy Conservation And Environmental Protection Co ltd
Current assignee: Nanjing Huaming Energy Conservation And Environmental Protection Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-08-03
Anticipated expiration: 2030-10-27

Abstract

The utility model belongs to the technical field of the centrifugal pump, concretely relates to multistage centrifugal pump. The utility model comprises a base, a water-cooling motor and a pump body are arranged on the base; a drainage port is arranged at the side end of the water inlet of the pump body, and a backflow port is arranged at the side end of the water outlet; a first water pipe and a second water pipe are installed in the base, and two ends of the first water pipe are respectively connected with the reflux port and the water outlet of the water-cooled motor through pipelines; two ends of the water pipe II are respectively connected with the drainage port and the water inlet of the water-cooling motor through pipelines; and silencing sleeves are mounted outside the water-cooled motor and the pump body. A plurality of impellers are detachably arranged on a shaft body of the rotating shaft in the pump body at intervals; cushion covers are detachably arranged at two ends of the impeller; the shaft body of the rotating shaft positioned between the adjacent cushion covers is also detachably provided with a spacer bush. The utility model uses the water-cooling motor and is additionally provided with the silencing sleeve, thus reducing the noise; and a cushion sleeve and a spacer sleeve are arranged between the adjacent impellers, so that the running stability of the impellers is improved.

Description

Multistage centrifugal pump

Technical Field

The utility model belongs to the technical field of the centrifugal pump, concretely relates to multistage centrifugal pump.

Background

The multistage centrifugal pump is characterized in that more than two centrifugal pumps with the same function are integrated together, and the fluid channel structure is represented in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, and the medium pressure relief opening of the second stage is identical to the inlet of a third stage, so that the multistage centrifugal pump is formed by a mechanism connected in series.

In the prior art, most of motors matched with the multistage centrifugal pump are standard industrial motors, heat dissipation is carried out through air cooling, and the noise is high during work; in addition, in the prior art, when the impeller of the multistage centrifugal pump is damaged, the steps for replacing the impeller are complicated, the impeller is not easy to disassemble and assemble, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

To the above insufficiency, the utility model aims at providing a multistage centrifugal pump.

The utility model provides a following technical scheme:

a multistage centrifugal pump comprises a base, wherein a water-cooling motor and a pump body are arranged on the base, a rotating shaft is arranged on the pump body, and a motor shaft of the water-cooling motor is connected with the rotating shaft through a coupler; the pump body is provided with a water inlet and a water outlet; the water-cooled motor is provided with a water inlet of the water-cooled motor and a water outlet of the water-cooled motor; the side end of the water inlet is provided with a drainage port, and the side end of the water outlet is provided with a reflux port; a first water pipe and a second water pipe are arranged in the base, and both ends of the first water pipe and both ends of the second water pipe extend out of the upper end face of the base; two ends of the first water pipe are respectively connected with the reflux port and the water outlet of the water-cooling motor through pipelines; two ends of the water pipe II are respectively connected with the drainage port and the water inlet of the water-cooling motor through pipelines; the water-cooling motor and the outside of the pump body are both provided with a silencing sleeve;

a plurality of impellers are detachably arranged on a shaft body of the rotating shaft in the pump body at intervals; cushion covers are detachably arranged at two ends of the impeller; the shaft body of the rotating shaft positioned between the adjacent cushion covers is also detachably provided with a spacer bush.

The rotating shaft is arranged on the shaft body in the pump body, and a plurality of groups of limiting strips are arranged on the shaft body at intervals.

The impeller is characterized in that a mounting hole is formed in the middle of the impeller, a plurality of limiting grooves are formed in the hole wall of the mounting hole, and the limiting grooves are matched with the limiting strips.

And a plurality of groups of blades are fixedly arranged on the impeller.

The cushion cover is provided with a plurality of through holes; the impeller is provided with a plurality of threaded holes; the through hole corresponds to the threaded hole; the cushion cover is fixedly arranged on the impeller through screws.

The spacer bush comprises an upper spacer bush and a lower spacer bush; a first fixing block is fixedly connected to two ends of the upper spacer bush, and a first threaded through hole is formed in the first fixing block; two ends of the lower spacer bush are fixedly connected with a second fixing block, and a second threaded through hole is formed in the second fixing block.

The first threaded through hole and the second threaded through hole correspond to each other and have the same aperture.

The silencing material of the silencing sleeve is glass fiber cotton.

The utility model has the advantages that:

the utility model replaces the air cooling motor with the water cooling motor, and forms a water flow loop by additionally arranging a pipeline between the water cooling motor and the pump body, thereby realizing the cooling of the motor and reducing the use of the pipeline; the noise generated by the equipment during working is reduced by additionally arranging the silencing sleeves outside the pump body and the water-cooling motor; through the installation detachable impeller to installation cushion cover and spacer sleeve between adjacent impeller, improved impeller moving stability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic view of the installation of the rotating shaft and impeller of the present invention;

fig. 4 is a schematic view of the spacer structure of the present invention.

Labeled as: the water cooling device comprises a base 101, a first water pipe 102, a second water pipe 103, a silencing sleeve 104, a pump body 105, a water outlet 106, an impeller 107, a water inlet 108, a rotating shaft 109, a coupler 110, a water-cooling motor 111, a cushion cover 112, an upper spacer 113, a lower spacer 114, a limiting strip 115, a threaded hole 116, a first fixing block 117, a second fixing block 118, a water-cooling motor water outlet 119, a water-cooling motor water inlet 120, a backflow port 121 and a drainage port 122.

Detailed Description

As shown in the figure, the multistage centrifugal pump comprises a base 101, a first water pipe 102, a second water pipe 103, a silencing sleeve 104, a pump body 105, a coupling 110 and a water-cooling motor 111. The water-cooled motor 111 and the pump body 105 are fixedly installed on the upper end surface of the base 101, a rotating shaft 109 installed on the pump body 105 is connected with a motor shaft of the water-cooled motor 111 through a coupler 110, the water-cooled motor 111 is started, and the motor shaft can drive the rotating shaft 109 to rotate through the coupler 110. The pump body 105 is provided with a water inlet 108 and a water outlet 106, a drainage port 122 is arranged at the side end of the water inlet 108, and a return port 121 is arranged at the side end of the water outlet 106. The water-cooled motor 111 is provided with a water-cooled motor water inlet 120 and a water-cooled motor water outlet 119. Two channels are arranged inside the base 101, and a first water pipe 102 and a second water pipe 103 are respectively arranged in the two channels. Both ends of the first water pipe 102 and both ends of the second water pipe 103 extend out of the upper end face of the base 101. Two ends of the first water pipe 102 are respectively connected with the return port 121 and the water outlet 119 of the water-cooled motor through pipelines, and two ends of the second water pipe 103 are also respectively connected with the drainage port 122 and the water inlet 120 of the water-cooled motor through pipelines. When the device works, a part of water in the water inlet 108 flows out from the drainage port 122 and then flows into the water inlet 120 of the water-cooled motor, so that the water-cooled motor 111 is cooled. The returned water flows out from the water outlet 119 of the water-cooled motor and then joins with the water flowing out from the water outlet 106 through the return port 121. The first water pipe 102 and the second water pipe 103 are arranged inside the base 101 instead of outside, so that the first water pipe 102 and the second water pipe 103 can be prevented from being damaged in the transportation and installation processes, and the service life is prolonged.

The water-cooled motor 111 and the outside of the pump body 105 are both provided with a silencing sleeve 104, and the silencing material of the silencing sleeve 104 can be selected from various materials, such as sponge or glass fiber cotton.

A plurality of impellers 107 are detachably and alternately mounted on a shaft body of the rotating shaft 109 positioned in the pump body 105, and a plurality of groups of blades are fixedly mounted on the impellers 107. A plurality of groups of limiting strips 115 are arranged on the shaft body of the rotating shaft 109 positioned in the pump body 105 at intervals, each group of limiting strips 115 are uniformly distributed on the outer circumferential surface of the shaft body, and the limiting strips 115 and the rotating shaft 109 are of an integrally cast structure. The middle of the impeller 107 is provided with a mounting hole, the hole wall of the mounting hole is provided with a plurality of limiting grooves, and the limiting grooves are matched with the limiting strips 115, so that the impeller 107 can be sleeved on the rotating shaft 109. When a single impeller 107 is damaged, the damaged impeller may be removed and replaced with a new impeller.

In order to prevent foreign matters from entering between the limiting strips 115 and the limiting grooves to influence assembly, the two ends of the impeller 107 are detachably provided with cushion covers 112, and the cushion covers 112 can be connected through clamping grooves or screws. When using the screw connection, a plurality of through holes are provided on the spacer 112, and a plurality of screw holes 116 are correspondingly provided on the impeller 107, and the spacer 112 is mounted at both ends of the impeller 107 by inserting the screws into the through holes and screwing one end of the external screw into the screw holes 116.

To prevent the impeller 107 from being displaced during operation, spacers are mounted on the shaft 109 between adjacent cushion covers 112, and the spacers are detachably mounted on the shaft 109. The spacer comprises an upper spacer 113 and a lower spacer 114, and the upper spacer 113 and the lower spacer 114 are identical in capital and in a bearing bush shape. Two ends of the upper spacer sleeve 113 are fixedly provided with a first fixing block 117 through welding, and the first fixing block 117 is provided with a first threaded through hole; two ends of the lower spacer bush 114 are fixedly provided with a second fixing block 118 through welding, and the second fixing block 118 is also provided with a second threaded through hole. The first threaded through hole corresponds to the second threaded through hole and has the same hole diameter. When the device is installed, the upper spacer 113 and the lower spacer 114 are sleeved on the rotating shaft 109 between the adjacent cushion covers 112, and then the upper spacer 113 and the lower spacer 114 are fixed by bolts. Spacers are arranged between the adjacent cushion covers 112 to abut against the impeller 107, so that the impeller 107 cannot be displaced during operation.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multistage centrifugal pump comprises a base (101), wherein a water-cooling motor (111) and a pump body (105) are installed on the base (101), a rotating shaft (109) is installed on the pump body (105), and a motor shaft of the water-cooling motor (111) is connected with the rotating shaft (109) through a coupling (110); a water inlet (108) and a water outlet (106) are arranged on the pump body (105); the water-cooled motor (111) is provided with a water-cooled motor water inlet (120) and a water-cooled motor water outlet (119); the method is characterized in that: a drainage port (122) is arranged at the side end of the water inlet (108), and a return port (121) is arranged at the side end of the water outlet (106); a first water pipe (102) and a second water pipe (103) are installed in the base (101), and two ends of the first water pipe (102) and two ends of the second water pipe (103) extend out of the upper end face of the base (101); two ends of the first water pipe (102) are respectively connected with the return port (121) and the water outlet (119) of the water-cooling motor through pipelines; two ends of the water pipe II (103) are respectively connected with the drainage port (122) and the water inlet (120) of the water-cooling motor through pipelines; the water-cooled motor (111) and the pump body (105) are externally provided with a silencing sleeve (104);

a plurality of impellers (107) are detachably arranged on a shaft body of the rotating shaft (109) positioned in the pump body (105) at intervals; a cushion cover (112) is detachably arranged at two ends of the impeller (107); the shaft body of the rotating shaft (109) between the adjacent cushion covers (112) is also detachably provided with a spacer bush.

2. The multistage centrifugal pump of claim 1, wherein: the rotating shaft (109) is positioned on the shaft body in the pump body (105) and is provided with a plurality of groups of limiting strips (115) at intervals.

3. The multistage centrifugal pump of claim 2, wherein: the middle of the impeller (107) is provided with a mounting hole, the hole wall of the mounting hole is provided with a plurality of limiting grooves, and the limiting grooves are matched with the limiting strips (115).

4. The multistage centrifugal pump of claim 1, wherein: and a plurality of groups of blades are fixedly arranged on the impeller (107).

5. The multistage centrifugal pump of claim 1, wherein: the cushion cover (112) is provided with a plurality of through holes; a plurality of threaded holes (116) are formed in the impeller (107); the through hole corresponds to the threaded hole (116); the cushion cover (112) is fixedly arranged on the impeller (107) through screws.

6. The multistage centrifugal pump of claim 1, wherein: the spacer comprises an upper spacer (113) and a lower spacer (114); a first fixing block (117) is fixedly connected to two ends of the upper spacer bush (113), and a first threaded through hole is formed in the first fixing block (117); two ends of the lower spacer bush (114) are fixedly connected with a second fixing block (118), and a second threaded through hole is formed in the second fixing block (118).

7. The multistage centrifugal pump of claim 6, wherein: the first threaded through hole and the second threaded through hole correspond to each other and have the same aperture.

8. The multistage centrifugal pump of claim 1, wherein: the silencing material of the silencing sleeve (104) is glass fiber cotton.