Vertical submerged pump

Abstract

The utility model provides a vertical submerged pump which comprises a pumping mechanism, an extension pipe and a plurality of vortex eliminating mechanisms, the extension pipe is arranged at a pump inlet of the pumping mechanism, the vortex eliminating mechanisms are arranged on the periphery of the extension pipe, the vortex eliminating mechanisms extend outwards in the radial direction of the extension pipe, and each vortex eliminating mechanism is provided with a water inlet. By arranging the vortex eliminating mechanisms extending in the radial direction of the extension pipe, the vortex generation conditions at the water inlets can be destroyed, air is prevented from entering the extension pipe along with vortexes, the vortex eliminating mechanisms are arranged at intervals in the circumferential direction and are provided with the water inlets respectively, water can enter the extension pipe in a dispersed mode in all directions, and the vortex eliminating efficiency is improved. And the generation of large eddy current can also be avoided. Under the combined action of the extension pipe and the vortex eliminating mechanism, the problems of noise, vibration, cavitation, bearing and mechanical seal failure, part abrasion and the like caused by the fact that air enters the pumping mechanism along with vortex can be avoided, the operation stability of the pumping mechanism is improved, and the service life of the pumping mechanism is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pumps, and in particular relates to a vertical submersible pump. Background Art

[0002] A vertical submersible pump operates by submerging the pump body into the liquid. The motor is located above the liquid surface and a vertically mounted long shaft drives the impeller, which is driven by the centrifugal force generated by the high-speed rotation of the impeller to transport the liquid. Vertical submersible pumps offer a compact structure, a small footprint, and are easy to install. Once installed, the pump casing can be directly immersed in the liquid. This makes it less susceptible to leakage and wear when transporting abrasive and coarse-grained media. Therefore, this type of pump is particularly suitable for treating wastewater and sludge containing solid particles such as coal slag, ash, and gypsum in thermal power plants.

[0003] After installation, the vertical submersible pump's casing is immersed in the pool, with the water inlet located below. When the height difference between the liquid level and the inlet is small, the water flow in the pool becomes turbulent, even generating surface vortices. These vortices can draw air into the pump casing, reducing pump dynamic parameters (such as flow rate, head, and efficiency). Furthermore, the entrained air can cause noise, vibration, cavitation, bearing and mechanical seal failure, and component wear. Utility Model Content

[0004] The utility model provides a vertical submersible pump, aiming to solve the problem in the prior art that eddy currents generated by the submersible pump during operation may cause air to mix in, thereby affecting the performance and service life of the pump.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a vertical submersible pump, comprising:

[0006] a pumping mechanism having a downwardly facing pump inlet;

[0007] an extension pipe arranged in a vertical direction, wherein the upper end of the extension pipe is connected to the pump inlet, and a side wall of the lower end of the extension pipe is provided with a plurality of communication openings, wherein the plurality of communication openings are arranged at intervals along the circumference of the extension pipe; and

[0008] Multiple vortex-eliminating mechanisms are circumferentially arranged on the outer circumference of the extension tube and correspond one-to-one to the connecting ports. The vortex-eliminating mechanisms are radially extended along the extension tube. The interior of the vortex-eliminating mechanisms is hollow to form a connecting cavity, which is connected to the corresponding connecting ports. The inner wall of the connecting cavity is also provided with a water inlet that penetrates the thickness of its own wall.

[0009] In one possible implementation, the pumping mechanism includes:

[0010] Support plate;

[0011] A support tube is vertically arranged on the support plate;

[0012] A pump body, comprising a pump casing and an impeller, wherein a pump outlet and a pump inlet are formed at the bottom of the pump casing, the pump casing is connected to the bottom of the support pipe, and the impeller is rotatably disposed inside the pump casing;

[0013] a drive mechanism comprising a transmission shaft and a drive motor, wherein the transmission shaft is vertically disposed in the support tube and coaxially connected to the impeller, and the drive motor is disposed above the support tube and is in driving connection with the upper end of the transmission shaft; and

[0014] A liquid outlet pipe is connected to the pump outlet.

[0015] In a possible implementation, the support tube and the pump casing, the pump inlet and the extension tube, and the liquid outlet pipe and the pump outlet are connected via flanges.

[0016] In a possible implementation, the bottom of the extension tube is closed, the communication port and the bottom of the extension tube are spaced apart by a preset distance along the axial direction of the extension tube, and the bottom of the extension tube is used to contact the bottom of the pool.

[0017] In a possible implementation, the water inlet is opened on the side or bottom of the vortex elimination mechanism.

[0018] In a possible implementation, the axial length of the extension tube is greater than or equal to three times its inner diameter.

[0019] In a possible implementation, the vortex elimination mechanism is in the shape of a triangular pyramid, the bottom surface of the vortex elimination mechanism is parallel to the horizontal plane, and the water inlet is opened on the bottom surface of the vortex elimination mechanism.

[0020] In one possible implementation, the vortex-eliminating mechanism includes two vortex-eliminating plates and a connecting plate, the two vortex-eliminating plates are arranged relative to each other with respect to a vertical plane, one side of the vortex-eliminating plate is connected to the outer wall of the extension tube, and the other side of the vortex-eliminating plate extends radially outward along the extension tube, the tops of the two vortex-eliminating plates are connected to each other, and the connecting plate is connected to the bottoms of the two vortex-eliminating plates, and the connecting plate and the two vortex-eliminating plates together enclose the connecting cavity, and the connecting plate is provided with the water inlet.

[0021] In a possible implementation, a filter is detachably provided at the water inlet.

[0022] In a possible implementation, the vortex elimination mechanism is provided with one or more water inlets.

[0023] Compared with the prior art, the vertical submersible pump provided by the utility model has the following beneficial effects:

[0024] The vertical submersible pump provided by the present invention includes a pumping mechanism, an extension pipe, and a plurality of vortex elimination mechanisms. The pump inlet of the pumping mechanism is provided with an extension pipe, and a plurality of vortex elimination mechanisms are provided on the outer periphery of the extension pipe. The vortex elimination mechanisms extend radially outward along the extension pipe, and each vortex elimination mechanism is provided with a water inlet. The present invention can destroy the conditions for the generation of vortices at the water inlet by providing a vortex elimination mechanism extending radially along the extension pipe, thereby preventing air from entering the extension pipe along with the vortex. The plurality of vortex elimination mechanisms are arranged at intervals along the circumference and are respectively provided with a water inlet, so that water can enter the extension pipe in a dispersed manner from all directions, and can also prevent the generation of large vortices. The extension pipe and the vortex elimination mechanism work together to avoid problems such as noise, vibration, cavitation, failure of bearings and mechanical seals, and wear of parts caused by air entering the pumping mechanism along with the vortex, thereby improving the operational stability and service life of the pumping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a vertical submersible pump provided in an embodiment of the utility model Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a vertical submersible pump provided in an embodiment of the utility model Figure 2 ;

[0027] Figure 3 This is a schematic structural diagram of the extension tube and the vortex elimination mechanism in an embodiment of the present utility model;

[0028] Figure 4 This is an internal cross-sectional view of the extension tube and the vortex elimination mechanism in an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the installation of a vertical submersible pump provided in an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Vertical submersible pump;

[0032] 10. Pumping mechanism; 11. Support plate; 12. Support pipe; 13. Pump body; 14. Drive motor; 15. Liquid outlet pipe; 20. Extension pipe; 30. Vortex elimination mechanism; 31. Vortex elimination plate; 32. Connecting plate; 321. Water inlet; 40. Diversion pier; DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to," "fixed," or "fixedly disposed" on another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to," "connected to" another element, it may be directly connected to the other element or there may also be an intermediate element. When an element is referred to as being "set on," "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. "Multiple" refers to two or more. "At least one" refers to one or more. "Several" refers to one or more.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0036] Please also refer to Figures 1 to 5 , the vertical hydraulic pump provided by the embodiment of the utility model is described below.

[0037] This utility model provides a vertical submersible pump, which aims to solve the problem in the prior art that the vortex generated by the submersible pump during operation may cause air to mix in, affecting the performance and service life of the pump. Figure 1 and Figure 2 The vertical submersible pump 1 provided by the embodiment of the present invention includes a pumping mechanism 10, an extension pipe 20 and a vortex elimination mechanism 30. The pumping mechanism 10 has a downward-facing pump inlet; the extension pipe 20 is arranged in a vertical direction, and the upper end of the extension pipe 20 is connected to the pump inlet. The side wall of the lower end of the extension pipe 20 is provided with multiple communicating ports, and the multiple communicating ports are arranged at intervals along the circumference of the extension pipe 20; multiple vortex elimination mechanisms 30 are circumferentially arranged on the outer periphery of the extension pipe 20 and correspond one-to-one to the communicating ports. The vortex elimination mechanism 30 is extended radially along the extension pipe 20, and a communicating cavity is formed in the interior of the vortex elimination mechanism 30. The communicating cavity is connected to the corresponding communicating port, and the inner wall of the communicating cavity is also provided with a water inlet 321 that penetrates its own wall thickness. The vortex elimination mechanism 30 can open one or more water inlets 321 as needed.

[0038] Compared with the prior art, the vertical submersible pump 1 provided by the embodiment of the utility model has the following beneficial effects:

[0039] The vertical submersible pump 1 provided by the present invention includes a pumping mechanism 10, an extension tube 20, and multiple vortex elimination mechanisms 30. The pump inlet of the pumping mechanism 10 is provided with an extension tube 20, and multiple vortex elimination mechanisms 30 are arranged on the periphery of the extension tube 20. The vortex elimination mechanisms 30 extend radially outward from the extension tube 20, and each vortex elimination mechanism 30 has a water inlet 321. By providing the vortex elimination mechanisms 30 extending radially along the extension tube 20, the present invention can eliminate the conditions for the generation of vortices at the water inlet 321, thereby preventing air from entering the extension tube 20 with the vortex. The multiple vortex elimination mechanisms 30 are arranged at intervals along the circumference and each has a water inlet 321, allowing water to enter the extension tube 20 in a dispersed manner from all directions, also preventing the generation of large vortices. The extension tube 20 and the vortex elimination mechanisms 30 work together to prevent noise, vibration, cavitation, bearing and mechanical seal failure, and component wear caused by air entering the pumping mechanism 10 with the vortex, thereby improving the operational stability and service life of the pumping mechanism 10.

[0040] In the embodiment of the present invention, the pumping mechanism 10 , namely the submersible pump body, can be directly selected from hydraulic pump products of suitable specifications and models currently available on the market, and can be used for conveying fluid media containing particulate matter.

[0041] For pipelines that transport solid particles, in order to avoid the blockage of the pipeline by particle sedimentation, or the medium deviation caused by the presence of elbows in the pipeline, which reduces the pumping efficiency or damages the impeller, a longer straight pipe section can be set at the pump inlet. If it is difficult to install a straight pipe section, a rectifier pipe or a guide plate should be installed near the pump inlet to prevent medium deviation and eddy currents. In this embodiment, the extension pipe 20 is installed below the pump inlet and is a vertically arranged straight pipe. Its function is to extend the depth of the water inlet 321 and prevent medium deviation. The extension pipe 20 can be made of wear-resistant materials such as stainless steel. A connecting port is provided on the lower side wall of the extension pipe 20. The connecting port should be at an appropriate distance from the lower end face of the extension pipe 20 to avoid blockage of the water inlet 321.

[0042] In some possible embodiments, the axial length of the extension tube 20 is greater than or equal to three times its inner diameter, so that the liquid can enter the pump smoothly and avoid biased flow and rotational flow that would cause the pump body 13 to vibrate and generate noise.

[0043] The vortex eliminating mechanism 30 can be a block, plate, or other shaped component. Multiple vortex eliminating mechanisms 30 are arranged on the periphery of the extension tube 20 to block the water flow entering the extension tube 20 and prevent the formation of continuous vortexes near the extension tube 20. The vortex eliminating mechanism 30 is hollow inside to form a connecting cavity, and the connecting cavity is provided with a water inlet 321.

[0044] In some possible embodiments, the water inlet 321 is opened on the side or bottom of the vortex elimination mechanism 30, and one or more water inlets 321 can be provided as needed.

[0045] See also Figure 1 and Figure 2 In some possible embodiments, the pumping mechanism 10 includes a support plate 11, a support tube 12, a pump body 13, a drive mechanism, and a liquid outlet pipe 15. The support tube 12 is vertically mounted on the support plate 11; the pump body 13 includes a pump casing and an impeller, with a pump outlet and a pump inlet formed at the bottom of the pump casing. The pump casing is connected to the bottom of the support tube 12, and the impeller is rotatably mounted inside the pump casing. The drive mechanism includes a transmission shaft and a drive motor 14. The transmission shaft is vertically mounted inside the support tube 12 and is coaxially connected to the impeller. The drive motor 14 is mounted above the support tube 12 and is in transmission connection with the upper end of the transmission shaft. The liquid outlet pipe 15 is connected to the pump outlet.

[0046] In this embodiment, support plate 11 provides support for components mounted thereon, including support tube 12, drive motor 14, and liquid outlet pipe 15. The pump casing is connected to the lower end of support tube 12, and the impeller is rotatably disposed within the pump casing. Drive motor 14 is disposed at the upper end of support tube 12 and is connected to the impeller via a drive shaft, driving the impeller to rotate at high speed. The centrifugal force generated by the impeller's rotation draws water from the pool through water inlet 321, passes through extension pipe 20 and the pump casing, and is discharged through liquid outlet pipe 15.

[0047] See also Figure 1 and Figure 2 In some possible embodiments, the support pipe 12 and the pump casing, the pump inlet and the extension pipe 20, and the liquid outlet pipe 15 and the pump outlet are respectively installed and fixed by flange plates and connecting bolts, which is convenient for installation and maintenance.

[0048] See also Figure 3 、 Figure 4 and 5 In some possible embodiments, the bottom of the extension tube 20 is sealed, and the communication port is spaced from the bottom of the extension tube 20 by a predetermined distance (e.g., the diameter of the extension tube 20) along the axial direction of the extension tube 20. The bottom of the extension tube 20 is configured to contact the pool bottom. In this embodiment, the extension tube 20 supports the pool bottom, providing auxiliary support for the pump body 13 and further reducing vibration and noise generated during operation of the pumping mechanism 10. The predetermined distance between the communication port and the bottom of the extension tube 20 along the axial direction of the extension tube 20 is not specifically limited and can be set by the user as needed.

[0049] like Figure 5 As shown, in order to further reduce the generation of eddies, a guide pier 40 can be provided at the bottom of the pool. The guide pier 40 is provided on one side of the extension pipe 20, and one or more guide piers can be provided as needed. The structure and arrangement of the guide pier 40 are prior art and will not be described in detail here.

[0050] See also Figure 3 and Figure 4 In some possible embodiments, the vortex elimination mechanism 30 is in the shape of a triangular pyramid, has a simple structure, and is easy to manufacture. The vortex elimination mechanism 30 can be fixed to the extension pipe 20 by welding or other means. The bottom surface of the vortex elimination mechanism 30 is parallel to the horizontal plane, and the water inlet 321 is opened on the bottom surface of the vortex elimination mechanism 30.

[0051] See also Figure 3 and Figure 4 In some possible embodiments, the vortex elimination mechanism 30 includes two vortex elimination plates 31 and a connecting plate 32. The two vortex elimination plates 31 are arranged opposite to each other with respect to the vertical plane. One side of the vortex elimination plate 31 is connected to the outer wall of the extension pipe 20, and the other side of the vortex elimination plate 31 extends outward along the radial direction of the extension pipe 20. The tops of the two vortex elimination plates 31 are connected to each other, and the connecting plate 32 is connected to the bottoms of the two vortex elimination plates 31. The connecting plate 32 and the two vortex elimination plates 31 together enclose a connecting cavity, and the connecting plate 32 is provided with a water inlet 321.

[0052] like Figure 3 and Figure 4 As shown, in this embodiment, the vortex elimination mechanism 30 is in the shape of a triangular pyramid, the vertical cross-section of the vortex elimination mechanism is a triangle, and the cross-section of the triangle gradually shrinks outward along the radial direction of the extension tube 20.

[0053] In some possible embodiments, in order to prevent clogging, a filter is provided at the water inlet 321 . In order to facilitate cleaning or replacement of the filter, the filter is detachably provided by fasteners such as screws.

[0054] It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification of the utility model has recorded various combination embodiments and can support different combination embodiments.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertical submersible pump, characterized in that: include: a pumping mechanism having a downwardly facing pump inlet; an extension pipe arranged in a vertical direction, wherein the upper end of the extension pipe is connected to the pump inlet, and a side wall of the lower end of the extension pipe is provided with a plurality of communication openings, wherein the plurality of communication openings are arranged at intervals along the circumference of the extension pipe; and Multiple vortex-eliminating mechanisms are circumferentially arranged on the outer circumference of the extension tube and correspond one-to-one to the connecting ports. The vortex-eliminating mechanisms are radially extended along the extension tube. The interior of the vortex-eliminating mechanisms is hollow to form a connecting cavity, which is connected to the corresponding connecting ports. The inner wall of the connecting cavity is also provided with a water inlet that penetrates the thickness of its own wall.

2. The vertical submersible pump according to claim 1, characterized in that: The pumping mechanism comprises: Support plate; A support tube is vertically arranged on the support plate; A pump body, comprising a pump casing and an impeller, wherein a pump outlet and a pump inlet are formed at the bottom of the pump casing, the pump casing is connected to the bottom of the support pipe, and the impeller is rotatably disposed inside the pump casing; a drive mechanism comprising a transmission shaft and a drive motor, wherein the transmission shaft is vertically disposed in the support tube and coaxially connected to the impeller, and the drive motor is disposed above the support tube and is in driving connection with the upper end of the transmission shaft; and A liquid outlet pipe is connected to the pump outlet.

3. The vertical submersible pump according to claim 2, characterized in that: The support pipe and the pump housing, the pump inlet and the extension pipe, and the liquid outlet pipe and the pump outlet are connected respectively via flanges.

4. The vertical submersible pump according to claim 1, characterized in that: The bottom of the extension tube is closed, the communication port and the bottom of the extension tube are spaced apart by a preset distance along the axial direction of the extension tube, and the bottom of the extension tube is used to contact the bottom of the pool.

5. The vertical submersible pump according to claim 1, characterized in that: The water inlet is opened on the side or bottom of the vortex elimination mechanism.

6. The vertical submersible pump according to claim 1, characterized in that: The axial length of the extension tube is greater than or equal to three times its inner diameter.

7. The vertical submersible pump according to claim 1, characterized in that: The vortex elimination mechanism is in the shape of a triangular pyramid, the bottom surface of the vortex elimination mechanism is parallel to the horizontal plane, and the water inlet is opened on the bottom surface of the vortex elimination mechanism.

8. The vertical submersible pump according to claim 7, characterized in that: The vortex-eliminating mechanism includes two vortex-eliminating plates and a connecting plate. The two vortex-eliminating plates are arranged relative to each other with respect to a vertical plane. One side of the vortex-eliminating plate is connected to the outer wall of the extension tube, and the other side of the vortex-eliminating plate extends outward radially along the extension tube. The tops of the two vortex-eliminating plates are connected to each other, and the connecting plate is connected to the bottoms of the two vortex-eliminating plates. The connecting plate and the two vortex-eliminating plates together enclose the connecting cavity, and the connecting plate is provided with the water inlet.

9. The vertical submersible pump according to claim 1, characterized in that: A filter screen is detachably provided at the water inlet.

10. The vertical submersible pump according to claim 1, characterized in that: The vortex elimination mechanism is provided with one or more water inlets.

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