A centrifugal pump and a laser particle sizer disperser having the same

Abstract

The utility model relates to a centrifugal pump and laser particle size instrument disperser with the centrifugal pump, centrifugal pump includes: bearing, rotating shaft, its upper end with bearing rotatable connection, pump body is set up in the lower extreme of rotating shaft, is used for drawing the liquid in the corresponding container, the pump body includes: pump shell and impeller, the impeller is set in the lower part of rotating shaft and is tightly coupled with rotating shaft, to make when rotating shaft is driven to rotate by motor located rotating shaft top, the impeller rotates with rotating shaft, the pump shell cover is established outside the impeller, and eccentric hole is arranged on the lateral wall of pump shell, to make when the high -speed rotation of impeller, the liquid in the pump shell is thrown to the lateral wall of pump shell and flows from eccentric hole. The utility model can make sample dispersion stable, and under the condition that big granule sample is not easy to break, make it be dispersed, keep the original state of sample as far as possible.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically to a centrifugal pump and a laser particle size analyzer disperser having the centrifugal pump. Background Technology

[0002] Soil particle size analysis using a laser particle size analyzer requires the addition of liquid for stirring and dispersion, which directly affects the accuracy of the data. For samples that cannot be dispersed, increasing the disperser pump speed increases the shear force at the pump blade tip. This can lead to several problems: increased destructive force on the sample particles and the formation of eddies and bubbles in the sample chamber, resulting in distorted results. Furthermore, the shear force at the edge of traditional impeller blades can cause breakage of the original sample, also leading to inaccurate results.

[0003] In addition, the existing centrifugal pump has a structure in which a rotary motor is connected to a rotary shaft. The rotary shaft is a fixed axis. With increased use, the wear of the rotary shaft increases, the oscillation on the rotary shaft increases, the structure becomes unstable, and thus the sample dispersion becomes unstable. Utility Model Content

[0004] To address the aforementioned problems, the primary objective of this invention is to provide a centrifugal pump that can reduce wear on the rotating shaft, decrease oscillation on the rotating shaft, stabilize the centrifugal pump structure, thereby ensuring stable sample dispersion and altering the pump body blade structure to disperse large particles at the same rotational speed, thus preserving the original state of the sample as much as possible.

[0005] The second objective of this invention is to provide a laser particle size analyzer disperser having the centrifugal pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The centrifugal pump of this utility model includes: a bearing; a rotating shaft, the upper end of which is rotatably connected to the bearing;

[0008] A pump body, located at the lower end of the rotating shaft, is used to stir, disperse, and extract liquid from a corresponding container. The pump body includes a pump casing and an impeller. The impeller is sleeved on the lower part of the rotating shaft and tightly fitted to the rotating shaft, so that when the rotating shaft is driven to rotate by a motor located at the top of the rotating shaft, the impeller rotates with the rotating shaft. The pump casing covers the impeller, and an eccentric hole is provided on the side wall of the pump casing, so that when the impeller rotates at high speed, the liquid inside the pump casing is thrown to the side wall of the pump casing and flows out from the eccentric hole.

[0009] Preferably, the centrifugal pump includes an impeller sleeve and impeller blades, with at least two impeller blades arranged circumferentially around the impeller sleeve; the length of the impeller blades is 3-8 mm and the width is 3-5 mm.

[0010] Preferably, the centrifugal pump further includes an agitator, the lower end of the rotating shaft extends out of the bottom of the pump casing and has a thread at the lower end; the agitator is threadedly connected to the lower end of the rotating shaft so that the agitator rotates with the rotating shaft when the rotating shaft rotates.

[0011] Preferably, the centrifugal pump includes an agitator sleeve and agitator blades, with at least two agitator blades arranged circumferentially around the agitator sleeve.

[0012] Preferably, the centrifugal pump further includes a bushing, which is sleeved on the outside of the rotating shaft, with its upper end threadedly connected to the bearing and its lower end connected to the pump casing of the pump body; the bushing is used to protect the rotating shaft.

[0013] Preferably, the centrifugal pump has a boss on the rotating shaft and a limiting plate protruding towards the center on the bushing; when the bushing is fitted with the rotating shaft, the rotating shaft passes through the limiting plate and the boss is fitted below the limiting plate, so as to limit the rotating shaft in the axial direction.

[0014] Preferably, the centrifugal pump further includes a water outlet pipe connected to the eccentric hole for discharging the extracted liquid.

[0015] This utility model also provides a laser particle size analyzer disperser, including the centrifugal pump mentioned above.

[0016] This utility model has the following advantages due to the adoption of the above technical solution:

[0017] (1) The centrifugal pump described in this utility model reduces the wear of the rotating shaft and reduces the swaying on the rotating shaft by connecting a bearing to the top of the rotating shaft, thereby making the structure of the centrifugal pump stable and thus making the sample dispersion stable.

[0018] (2) By reducing the shear force at the tip of the impeller blades: At the same speed, the shear force at the edge of the blades can be changed by changing the length and height of the original centrifugal pump impeller blades. This ensures that the original speed and flow rate remain unchanged per unit time, while the shear force at the tip of the blades is greatly reduced, so that large particles can be fully dispersed without being sheared; thereby changing the original pump body structure to make the dispersion more stable.

[0019] (3) By setting a bushing, the rotating shaft can be protected from damage. The rotating shaft can be limited in the axial direction by the cooperation of the boss on the rotating shaft and the limiting plate on the bushing. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the centrifugal pump described in this utility model;

[0022] Figure 2 This is a cross-sectional structural schematic diagram of the centrifugal pump described in this utility model;

[0023] Figure 3 This is a schematic diagram of the impeller structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the stirring paddle of this utility model;

[0025] Figure 5 This is a diagram showing the usage state of this utility model installed on the laser particle size analyzer disperser.

[0026] The labels for the attached figures are as follows:

[0027] 1-Bearing; 2-Rotating shaft; 201-Boss; 3-Pump body; 301-Pump casing; 302-Impeller; 3021-Impeller sleeve; 3022-Impeller blade; 303-Eccentric hole; 304-Agitator; 3041-Agitator sleeve; 3042-Agitator blade; 4-Shaft sleeve; 401-Limiting plate. Detailed Implementation

[0028] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0029] This invention provides a centrifugal pump, specifically a centrifugal pump used in the disperser of a laser particle size analyzer. By connecting a bearing to the top of the rotating shaft, the wear of the rotating shaft is reduced, the oscillation on the rotating shaft is decreased, and the structure of the centrifugal pump is stabilized. Furthermore, by modifying the pump body structure to reduce shear force, the sample can be dispersed at the same rotation speed and under conditions where large particles are not easily broken, thus preserving the original state of the sample as much as possible and achieving stable dispersion.

[0030] like Figure 1 and Figure 2 As shown, the centrifugal pump provided by this utility model includes: a bearing 1; a rotating shaft 2, the upper end of which is rotatably connected to the bearing 1; and a pump body 3, which is disposed at the lower end of the rotating shaft 2 and is used to stir, disperse, and extract liquid from the corresponding container.

[0031] The pump body 3 includes a pump casing 301 and an impeller 302. The impeller 302 is sleeved on the lower part of the rotating shaft 2 and is tightly fitted with the rotating shaft 2 so that when the rotating shaft 2 is driven to rotate by a motor (not shown in the figure) located at the top of the rotating shaft 2, the impeller 302 rotates with the rotating shaft 2.

[0032] The pump casing 301 is covered outside the impeller 302, and an eccentric hole 303 is provided on the side wall of the pump casing 301 so that when the impeller 302 rotates at high speed, the liquid inside the pump casing 301 is thrown to the side wall of the pump casing 301 and flows out from the eccentric hole 303.

[0033] In the above embodiments, preferably, as follows: Figure 3 As shown, the impeller 302 includes an impeller sleeve 3021 and impeller blades 3022, with at least two impeller blades 3022 arranged circumferentially around the impeller sleeve 3021; ​​wherein, the length of the impeller blades 3022 is 3-8mm and the width is 3-5mm. Therefore, by changing the length and height of the original centrifugal pump blades, the shear force at the blade edges is altered. This ensures that the rotational speed and flow rate remain constant per unit time, while significantly reducing the shear force at the blade tips. Large particles are effectively dispersed without being sheared, thus making the dispersion more stable by modifying the original pump structure.

[0034] In the above embodiments, preferably, as follows: Figure 1 or Figure 2 As shown, the pump body 3 also includes an agitator 304. The lower end of the rotating shaft 2 extends out of the bottom of the pump housing 301 and has a thread at the lower end. The agitator 304 is threadedly connected to the lower end of the rotating shaft 2 so that the agitator 304 rotates with the rotating shaft 2 when the rotating shaft 2 rotates.

[0035] In the above embodiments, preferably, as follows: Figure 4 As shown, the stirring paddle 304 includes a stirring sleeve 3041 and stirring blades 3042, with at least two stirring blades 3042 arranged circumferentially around the stirring sleeve 3041.

[0036] In the above embodiments, preferably, the present invention also includes a bushing 4, which is sleeved on the outside of the rotating shaft 2. Its upper end is threadedly connected to the bearing 1, and its lower end is connected to the pump housing 301 of the pump body 3. The bushing 4 is used to protect the rotating shaft 2.

[0037] In the above embodiments, preferably, as follows: Figure 2As shown, a boss 201 is provided on the rotating shaft 2, and a limiting plate 401 protruding towards the center is provided on the bushing 4; when the bushing 4 is sleeved on the rotating shaft 2, the rotating shaft 2 passes through the limiting plate 401 and the boss 201 is attached to the bottom of the limiting plate 401, so as to limit the rotating shaft 2 in the axial direction.

[0038] In the above embodiments, preferably, the present invention also includes a water outlet pipe (not shown in the figure), which is connected to the eccentric hole 303 for discharging the extracted liquid.

[0039] like Figure 5 As shown, this utility model also provides a laser particle size analyzer disperser, including the centrifugal pump mentioned above.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A centrifugal pump, characterized in that, include Bearings; A rotating shaft, the upper end of which is rotatably connected to the bearing; The pump body, located at the lower end of the rotating shaft, is used to stir, disperse, and extract liquid from the corresponding container; The pump body includes: a pump casing and an impeller; the impeller is sleeved on the lower part of the rotating shaft and tightly fitted with the rotating shaft, so that when the rotating shaft is driven to rotate by a motor located at the top of the rotating shaft, the impeller rotates with the rotating shaft; The pump casing is installed outside the impeller, and an eccentric hole is provided on the side wall of the pump casing so that when the impeller rotates at high speed, the liquid inside the pump casing is thrown to the side wall of the pump casing and flows out from the eccentric hole. The impeller includes an impeller sleeve and impeller blades, with at least two impeller blades arranged circumferentially around the impeller sleeve; the length of the impeller blades is 3-8 mm and the width is 3-5 mm.

2. The centrifugal pump according to claim 1, characterized in that, The pump body also includes a stirring paddle, and the lower end of the rotating shaft extends out of the bottom of the pump casing and has threads at the lower end; The stirring paddle is threaded to the lower end of the rotating shaft so that the stirring paddle rotates with the rotating shaft when the rotating shaft rotates.

3. The centrifugal pump according to claim 2, characterized in that, The stirring paddle includes a stirring sleeve and stirring blades, with at least two stirring blades arranged circumferentially around the stirring sleeve.

4. The centrifugal pump according to claim 1, characterized in that, It also includes a bushing, which is sleeved outside the rotating shaft, with its upper end threadedly connected to the bearing and its lower end connected to the pump casing of the pump body; The bushing is used to protect the rotating shaft.

5. The centrifugal pump according to claim 4, characterized in that, The rotating shaft is provided with a boss, and the bushing is provided with a limiting plate that protrudes toward the center; When the bushing is fitted with the rotating shaft, the rotating shaft passes through the limiting plate and the boss is fitted below the limiting plate to limit the rotating shaft in the axial direction.

6. The centrifugal pump according to claim 1, characterized in that, It also includes a water outlet pipe, which is connected to the eccentric hole and is used to discharge the extracted liquid.

7. A laser particle size analyzer disperser, characterized in that, The centrifugal pump included in any one of claims 1 to 6.

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