Submersible axial mixed-flow pump and shaft mounting structure capable of reducing vortexes

Abstract

The utility model provides a submersible axial mixed-flow pump and shaft installation structure for reducing vortex, which comprises a precast concrete shaft, a middle flow channel and a water inlet flow channel, an embedded base is installed at the lower part of the precast concrete shaft, an axial mixed-flow pump is installed at the inner side of the embedded base, the lower end of the precast concrete shaft is communicated with the upper end of the middle flow channel, and the lower end of the middle flow channel is communicated with the water inlet flow channel. The lower end of the middle flow channel is communicated with the upper end of the water inlet flow channel, the inner diameter of the upper end of the middle flow channel is smaller than the outer diameter of an impeller shell of the axial mixed flow pump, a plurality of rib plates are arranged on the inner wall of the embedded base in a vertical extending mode and protrude inwards in the radial direction, and gaps exist between the rib plates and the impeller shell. The rubber pad separates the bottom end of the precast concrete shaft from the middle flow channel; according to the utility model, a plurality of rib plates are additionally arranged on the pre-embedded base, so that possible vortexes are damaged, and the vortexes are reduced; rubber pads are additionally arranged at the bottom of the shaft to cut off connection between the flow channel and the shaft, and therefore the purpose of reducing vortexes is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial mixed flow pump installation, in particular to a submersible axial mixed flow pump and a wellbore installation structure capable of reducing vortex. Background Art

[0002] Submersible shaft mixed flow pump in concrete prefabricated shaft installation, Figure 1~Figure 3 Since some axial mixed flow pumps 5 have cancelled the water inlet horn 7, combined with their special fixed state, there will be a large gap between the lower end surface of the impeller housing 6 and the concrete bottom plate of the embedded base 2. This gap causes a partially enclosed space between the axial mixed flow pump 5 and the embedded base 2. A local vortex 8 will be formed in the space, generating vibration and bubbles, resulting in poor operating stability of the axial mixed flow pump 5 and aggravating cavitation of the impeller housing 6, thereby affecting the service life of the axial mixed flow pump 5. Summary of the invention

[0003] The utility model aims to provide a submersible shaft mixed flow pump and wellbore installation structure capable of reducing vortex.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A submersible shaft mixed flow pump and wellbore installation structure for reducing vortex, comprising a precast concrete wellbore, an intermediate flow channel and a water inlet flow channel, wherein a pre-buried base is installed at the lower part of the precast concrete wellbore, an shaft mixed flow pump is installed inside the pre-buried base, the lower end of the precast concrete wellbore is connected with the upper end of the intermediate flow channel, the lower end of the intermediate flow channel is connected with the upper end of the water inlet flow channel, the inner diameter of the upper end of the intermediate flow channel is smaller than the outer diameter of the impeller housing of the shaft mixed flow pump, and the invention is characterized in that:

[0006] The inner wall of the embedded base is provided with a plurality of ribs extending vertically, the ribs protrude radially inward, there is a gap between the ribs and the impeller housing, and a rubber pad is provided at the bottom end of the embedded base, the rubber pad separates the bottom end of the precast concrete shaft and the middle flow channel.

[0007] Furthermore, the rubber pad is fixedly connected to the step at the lower end of the precast concrete shaft by screws.

[0008] Furthermore, the rib plate and the embedded base are fixed by welding.

[0009] The utility model adds several rib plates on the embedded base to destroy possible vortices and reduce the vortices; and adds or removes rubber pads at the bottom of the wellbore to cut off the connection between the flow channel and the wellbore, thereby achieving the purpose of reducing the vortices. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the combined structure of the wellbore and the flow channel in the prior art;

[0011] Figure 2 It is a structural schematic diagram of an axial mixed flow pump in the prior art;

[0012] Figure 3 It is a schematic diagram of the combined structure of a wellbore, a flow channel and an axial mixed flow pump in the prior art;

[0013] Figure 4 This is a schematic diagram of the structure of the embedded base of the utility model;

[0014] Figure 5 It is a schematic diagram of the combined structure of the utility model and a submersible shaft mixed flow pump.

[0015] Reference numerals:

[0016] 1 precast concrete shaft, 2 embedded base, 3 middle flow channel, 4 water inlet flow channel,

[0017] 5-axis mixed flow pump, 6-impeller housing, 7-water inlet horn, 8-vortex, 9-rib plate,

[0018] 10. Rubber pads. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model discloses a submersible shaft mixed flow pump 5 installation structure for reducing vortex 8, such as Figure 1~Figure 3 As shown, it includes a precast concrete shaft 1, an intermediate flow channel 3 and a water inlet flow channel 4. The embedded base 2 is installed at the lower part of the precast concrete shaft 1, and the axial mixed flow pump 5 is installed on the inner side of the embedded base 2. The lower end of the precast concrete shaft 1 is connected with the upper end of the intermediate flow channel 3, and the lower end of the intermediate flow channel 3 is connected with the upper end of the water inlet flow channel 4. The inner diameter of the upper end of the intermediate flow channel 3 is smaller than the outer diameter of the impeller housing 6 of the axial mixed flow pump 5.

[0021] like Figure 4 and Figure 5 As shown, the inner wall of the embedded base 2 is provided with a plurality of ribs 9 extending vertically. The ribs 9 are radially protruding inward. There is a gap between the ribs 9 and the impeller housing 6. The ribs 9 can be arranged at equal intervals along the circumferential direction. The sizes of the ribs 9 are different, so as to destroy the vortex 8 that may be generated on the inner side of the embedded base 2 and reduce the vortex 8.

[0022] A rubber pad 10 is provided at the bottom end of the embedded base 2, and the rubber pad 10 is fixedly connected to the step at the lower end of the precast concrete shaft 1 by screws. The rubber pad 10 separates the bottom end of the precast concrete shaft 1 and the middle flow channel 3, thereby achieving the purpose of reducing the vortex 8.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A submersible shaft mixed flow pump and wellbore installation structure for reducing vortex, comprising a precast concrete wellbore, an intermediate flow channel and a water inlet flow channel, a pre-buried base is installed at the lower part of the precast concrete wellbore, a shaft mixed flow pump is installed inside the pre-buried base, the lower end of the precast concrete wellbore is connected to the upper end of the intermediate flow channel, the lower end of the intermediate flow channel is connected to the upper end of the water inlet flow channel, the inner diameter of the upper end of the intermediate flow channel is smaller than the outer diameter of the impeller housing of the shaft mixed flow pump, characterized in that: The inner wall of the embedded base is provided with a plurality of ribs extending vertically, the ribs protrude radially inward, there is a gap between the ribs and the impeller housing, and a rubber pad is provided at the bottom end of the embedded base, the rubber pad separates the bottom end of the precast concrete shaft and the middle flow channel.

2. The submersible shaft mixed flow pump and wellbore installation structure for reducing vortex according to claim 1, characterized in that: The rubber pad is fixedly connected to the step at the lower end of the precast concrete shaft by screws.

3. The submersible shaft mixed flow pump and wellbore installation structure for reducing vortex according to claim 1, characterized in that: The rib plate and the embedded base are fixed by welding.

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