High-pressure efficient metal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a high-pressure high-efficiency metal pump which comprises a pump body and an impeller coaxially and rotatably arranged in the pump body, the outline of the inner wall of the pump body is in a vortex line shape, a liquid suction port is formed in the bottom of the pump body, and a liquid outlet used for being connected with a pipeline is formed in the pump body in the tangential direction of the inner wall. A partition plate is arranged on the pump body relative to the inner wall and located on the outer side of the impeller. A straight section part is arranged at the outer end of the partition plate in the tangential direction and located in the middle of the liquid outlet. The liquid outlet is evenly divided into two flow channels through the partition plate, the pressure of fluid flowing out of the liquid outlet is offset, and therefore the effect of the fluid pressure on the impeller is relieved, the impeller is stressed relatively evenly, and it is guaranteed that the whole impeller operates stably and efficiently in the relative high-pressure state.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a high-pressure and high-efficiency metal pump. Background Art

[0002] After existing single crystal silicon wafers are processed by slicing and grinding, the surface of the wafer is damaged by the processing stress, which is usually removed by chemical corrosion. For example, corrosion A is acid corrosion, and mixed acid solution is used to remove the damaged layer, producing hydrogen fluoride, NOX and waste mixed acid; corrosion B is alkaline corrosion, and sodium hydroxide solution is used to remove the damaged layer, producing waste alkali liquid. These chemical waste liquids are high in concentration and at a temperature of about 100°C, and need to be pumped out using a vertical centrifugal pump. However, existing centrifugal pumps are usually single-channel centrifugal pumps, such as a vertical multi-stage centrifugal pump outlet seat provided by Chinese utility model CN219012984U, which includes a rotating shaft driven by a motor, and the rotating shaft is used to drive the rotation of the impeller in the pump body. An inlet pipe is provided at the bottom of the pump body, and a horizontal outlet pipe is provided on the side. The inlet pipe, the pump body and the outlet pipe constitute a single channel. When the impeller rotates, the liquid flows in from the inlet pipe and is discharged through the outlet pipe. However, the liquid will generate a higher fluid pressure at the outlet pipe close to the pump body, resulting in uneven force on the impeller and damage, reducing the service life of the impeller and affecting the operating efficiency of the entire vertical centrifugal pump.

[0003] Therefore, it is urgent to transform the above-mentioned vertical centrifugal pump so that the whole can operate efficiently under relatively high pressure. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings of the prior art. To this end, the utility model provides a high-pressure and high-efficiency metal pump, which can reduce the effect of liquid pressure on the impeller, extend the service life of the impeller, and ensure the overall efficient operation under relatively high pressure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a high-pressure and high-efficiency metal pump, including a pump body and an impeller coaxially and rotatably disposed in the pump body, the inner wall contour of the pump body is a spiral line shape, the bottom of the pump body is provided with a liquid suction port, and the pump body is provided with a liquid outlet for connecting a pipeline along the tangential direction of the inner wall; the pump body is provided with a partition relative to the inner wall, and the partition is located on the outside of the impeller; the outer end of the partition is provided with a straight section along the tangential direction, and the straight section is located in the middle of the liquid outlet.

[0006] Furthermore, the pump body comprises an outer shell, the bottom thread of the outer shell is sealedly connected with a bottom cover, an O-ring is arranged between the top of the bottom cover and the bottom end of the outer shell; and the liquid suction port is arranged on the bottom cover.

[0007] Furthermore, an annular boss is provided at the bottom end of the bottom cover, and a plurality of grooves for tightening the bottom cover are evenly distributed on the annular boss.

[0008] Furthermore, a bracket is provided on the top of the pump body, a driving motor for driving the vertical rotating shaft (24) to rotate is fixedly provided on the top of the bracket, and the impeller is coaxially fixedly provided on the bottom of the vertical rotating shaft; a pressure relief gap communicating with each other is provided between the top of the pump body and the vertical rotating shaft and the impeller.

[0009] Furthermore, the impeller includes a sleeve that is keyed to the bottom of the vertical rotating shaft, and a connecting plate is coaxially provided on the top of the sleeve; a plurality of blade plates are evenly distributed and fixed on the bottom end of the connecting plate along the circumference, and the inner ends of the blade plates are vertically abutted against the sleeve; a pressure cap that is tightened with a nut is provided at the bottom of the sleeve; the nut is threadedly connected to the vertical rotating shaft; and the sleeve is located between the pressure cap and the vertical rotating shaft.

[0010] Furthermore, a plurality of rectangular bosses are provided on the top of the blade plate, and the rectangular bosses are interference fit into the connecting plate.

[0011] Furthermore, the bracket includes a vertical tube, a fixing plate is integrally provided at the top of the vertical tube, and the drive motor is fixed on the top of the fixing plate; the vertical rotating shaft is located inside the vertical tube; and an overflow hole communicating with the pressure relief gap is provided on the bottom outer wall of the vertical tube.

[0012] Furthermore, the liquid outlet is sealed and connected with a drain pipe, and the drain pipe vertically passes through the fixed plate; and a connecting flange is provided at the top end of the drain pipe.

[0013] Furthermore, the drive motor is a permanent magnet motor.

[0014] Furthermore, the central angle of the partition is greater than 180° and less than 210°.

[0015] Compared with the prior art, the beneficial effect of the utility model is: by setting the inner wall profile of the pump body to a spiral line shape, the partition is symmetrically divided relative to the liquid outlet. When the liquid flows out, the partition can offset part of the liquid outlet pressure, so that the impeller is subjected to relatively uniform force, thereby improving the high pressure resistance and service life of the impeller, so that the vertical centrifugal pump can operate efficiently and smoothly under high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0018] Figure 3It is a top cross-sectional view of the utility model.

[0019] Figure 4 for Figure 2 A is a partial enlargement of the figure.

[0020] Figure 5 for Figure 2 Schematic diagram of the structure of the impeller.

[0021] Among them: 1. Pump body; 2. Impeller; 3. Vertical pipe; 4. Fixed plate; 5. Drive motor; 6. Drain pipe; 7. Pressure cover; 11. Casing; 12. Bottom cover; 13. O-ring; 14. Groove; 15. Liquid outlet; 16. Partition; 21. Bushing; 22. Blade plate; 23. Connecting plate; 24. Vertical rotating shaft; 25. Rectangular boss; 31. Overflow hole; 32. Pressure relief gap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] Example

[0025] See also Figures 1 to 5 The utility model provides a high-pressure and high-efficiency metal pump, including a pump body 1, an impeller 2 coaxially and rotatably disposed in the pump body 1, the inner wall profile of the pump body 1 is a spiral line shape, a liquid suction port is provided at the bottom of the pump body 1, and the pump body 1 is provided with a liquid outlet 15 for connecting a pipeline along the tangential direction of the inner wall; the pump body 1 is provided with a partition 16 relative to the inner wall, and the partition 16 is located on the outer side of the impeller 2; the outer end of the partition 16 is provided with a straight section along the tangential direction, and the straight section is located in the middle of the liquid outlet 15.

[0026] The central angle of the partition plate 16 is preferably greater than 180° and less than 210°. While diverting the flow, it further offsets the influence of the fluid pressure and reduces the effect of the fluid pressure on the impeller 2, thereby extending the service life of the impeller 2.

[0027] The pump body 1 here may include a shell 11 , the bottom of the shell 11 is threadedly sealed with a bottom cover 12 , an O-ring 13 is provided between the top of the bottom cover 12 and the bottom of the shell 11 ; and a liquid suction port is provided on the bottom cover 12 .

[0028] Accordingly, the bottom end of the bottom cover 12 may be provided with an annular boss, and a plurality of grooves 14 for tightening the bottom cover 12 are evenly distributed on the annular boss to facilitate the installation of the bottom cover 12. The partition 16 and the housing 11 may be integrally cast, and the details are not repeated here.

[0029] As an embodiment of the utility model, a bracket is provided at the top of the pump body 1, a driving motor 5 for driving the vertical rotating shaft 24 to rotate is fixedly provided at the top of the bracket, and the impeller 2 is coaxially fixedly provided at the bottom of the vertical rotating shaft 24; a pressure relief gap 32 that is in communication is provided between the top of the pump body 1 and the vertical rotating shaft 24 and the impeller 2.

[0030] The driving motor 5 here is preferably a permanent magnet motor to ensure the smooth rotation of the impeller 2.

[0031] During use, part of the overall sucked liquid flows out from the pressure relief gap 32, reducing the fluid pressure generated at the liquid outlet 15, further ensuring that the force on the impeller 2 is uniform. The waste liquid flowing out of the pressure relief gap 32 then enters from the liquid suction port, and this process is repeated until the waste liquid is completely pumped out, ensuring the high-efficiency operation of the vertical centrifugal pump.

[0032] The impeller 2 here may include a sleeve 21 which is keyed to the bottom of a vertical shaft 24, and a connecting plate 23 is coaxially provided on the top of the sleeve 21; a plurality of blade plates 22 are evenly distributed and fixed on the bottom end of the connecting plate 23 along the circumference, and the inner ends of the blade plates 22 are vertically abutted against the sleeve 21; a pressure cap 7 which is tightened with a nut is provided at the bottom of the sleeve 21; the nut is threadedly connected to the vertical shaft 24; thereby, the sleeve 21 is fastened between the pressure cap 7 and the vertical shaft 24, ensuring that the vertical shaft 24 drives the impeller 2 to rotate.

[0033] Accordingly, the top of the blade plate 22 may be provided with a plurality of rectangular bosses 25, and the rectangular bosses 25 are interference fit into the connecting plate 23. When the blade plates 22 are damaged, they can be disassembled and replaced individually, saving man-hours and further improving the overall operation efficiency.

[0034] As an embodiment of the utility model, the above-mentioned bracket includes a vertical tube 3, the top of the vertical tube 3 is integrally provided with a fixing plate 4, and the driving motor 5 is fixed on the top of the fixing plate 4; the vertical rotating shaft 24 is located inside the vertical tube 3; the bottom outer wall of the vertical tube 3 is provided with an overflow hole 31 communicating with the pressure relief gap 32.

[0035] A plurality of reinforcing ribs may be provided between the vertical pipe 3 and the top of the pump body 1 to improve the overall structural stability.

[0036] When in use, the liquid outlet 15 is sealed and connected to a drain pipe 6 , which can vertically pass through the fixing plate 4 , and a connecting flange can be provided at the top of the drain pipe 6 for connection with an external pipeline, which will not be described in detail.

[0037] The principle of the utility model is to symmetrically divide the liquid outlet 15 into two flow channels by the partition 16, and to set the inner wall profile of the pump body 1 to a spiral line shape, so as to avoid interference between the partition 16 and the impeller 2, and ensure the overall reasonable layout. When the waste liquid enters the pump body 1 from the suction port, the fluid pressure generated at the liquid outlet 15 is partially offset by the partition 16, so that the force on the impeller 2 is relatively uniform; at the same time, the pressure relief gap 32 is set to reduce the pressure in the pump body 1, and further enable the impeller 2 to operate under a relatively high pressure state, that is, most of the waste liquid is discharged from the liquid outlet 15, and so on and so forth until the waste liquid extraction operation is completed; thereby, the utility model can operate efficiently under a relatively high pressure state.

[0038] The utility model can be summarized in other specific forms that do not violate the spirit or main features of the utility model. Therefore, no matter from which point of view, the above embodiments of the utility model can only be regarded as an explanation of the utility model and cannot limit the utility model. The claims indicate the scope of the utility model, while the above description does not indicate the scope of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims of the utility model.

Claims

1. A high-pressure and high-efficiency metal pump, comprising a pump body (1), and an impeller (2) coaxially and rotatably disposed in the pump body (1), characterized in that: The inner wall profile of the pump body (1) is a spiral line shape, a liquid suction port is provided at the bottom of the pump body (1), and a liquid outlet (15) for connecting a pipeline is provided along the tangent direction of the inner wall of the pump body (1); a partition (16) is provided on the pump body (1) relative to the inner wall, and the partition (16) is located on the outer side of the impeller (2); a straight section is provided on the outer end of the partition (16) along the tangent direction, and the straight section is located in the middle of the liquid outlet (15).

2. The high-pressure and high-efficiency metal pump according to claim 1, characterized in that: The pump body (1) comprises an outer shell (11), the bottom of the outer shell (11) is threadedly sealed with a bottom cover (12), an O-ring (13) is provided between the top of the bottom cover (12) and the bottom of the outer shell (11); the liquid suction port is provided on the bottom cover (12).

3. The high-pressure and high-efficiency metal pump according to claim 2, characterized in that: An annular boss is provided at the bottom end of the bottom cover (12), and a plurality of grooves (14) for tightening the bottom cover (12) are evenly distributed on the annular boss.

4. The high-pressure and high-efficiency metal pump according to claim 3, characterized in that: A bracket is provided at the top of the pump body (1), a driving motor (5) for driving the vertical rotating shaft (24) to rotate is fixedly provided at the top of the bracket, and the impeller (2) is coaxially fixedly provided at the bottom of the vertical rotating shaft (24); a pressure relief gap (32) communicating with each other is provided between the top of the pump body (1), the vertical rotating shaft (24) and the impeller (2).

5. The high-pressure and high-efficiency metal pump according to claim 4, characterized in that: The impeller (2) comprises a shaft sleeve (21) which is keyed to the bottom of the vertical rotating shaft (24); a connecting plate (23) is coaxially provided on the top of the shaft sleeve (21); a plurality of blade plates (22) are evenly distributed and fixed along the circumference of the bottom end of the connecting plate (23); the inner ends of the blade plates (22) are vertically abutted against the shaft sleeve (21); a pressure cover (7) is provided at the bottom of the shaft sleeve (21); the nut is threadedly connected to the vertical rotating shaft (24); and the shaft sleeve (21) is located between the pressure cover (7) and the vertical rotating shaft (24).

6. The high-pressure and high-efficiency metal pump according to claim 5, characterized in that: A plurality of rectangular bosses (25) are provided at the top end of the blade plate (22), and the rectangular bosses (25) are interference fit into the connecting plate (23).

7. The high-pressure and high-efficiency metal pump according to claim 5, characterized in that: The bracket comprises a vertical tube (3), a fixing plate (4) is integrally provided at the top of the vertical tube (3), and the driving motor (5) is fixedly arranged on the top of the fixing plate (4); the vertical rotating shaft (24) is located inside the vertical tube (3); and an overflow hole (31) communicating with the pressure relief gap (32) is provided on the bottom outer wall of the vertical tube (3).

8. The high-pressure and high-efficiency metal pump according to claim 7, characterized in that: The liquid outlet (15) is sealedly connected to a liquid discharge pipe (6), and the liquid discharge pipe (6) vertically passes through the fixed plate (4); a connecting flange is provided at the top end of the liquid discharge pipe (6).

9. The high-pressure and high-efficiency metal pump according to claim 4, characterized in that: The driving motor (5) is a permanent magnet motor.

10. The high-pressure and high-efficiency metal pump according to claim 1, characterized in that: The central angle of the partition (16) is greater than 180° and less than 210°.

Images