A circulating water conveying device with anti-bubble function for a particle size analyzer

Abstract

This invention relates to the field of particle size analyzer technology, specifically disclosing a circulating water conveying device for a particle size analyzer with anti-bubble conveying function. The device includes: a housing with a detachable cover plate; a water-conducting hose extending through the housing; and a pipe connector fixed to the end of the water-conducting hose; a motor fixed to the rear side of the housing; a rotating shaft rotatably connected to the housing; the rotating shaft being fixed to the output shaft of the motor; circumferentially spaced guide blocks fixed to the rotating shaft; and two sliding blocks slidably connected to the guide blocks; and a connecting frame fixed to adjacent sliding blocks, with a squeezing roller rotatably connected to the connecting frame. This invention, by setting the squeezing roller to a hollow structure and configuring a heat dissipation mechanism, reduces frictional heat generation during sample conveying as the squeezing roller rotates along the connecting frame, effectively preventing bubbles from precipitating in the sample and being conveyed along the water-conducting hose due to frictional heating between the water-conducting hose and the squeezing roller.

Description

Technical Field

[0001] This invention relates to the field of particle size analyzer equipment technology, and more specifically, to a circulating water conveying device for particle size analyzers with anti-bubble conveying function. Background Technology

[0002] As a precision instrument, the laser particle size analyzer utilizes the scattering characteristics of laser light by particles and combines Mie scattering theory to analyze the distribution of scattered light energy, enabling accurate measurement of particle size and its distribution. It features a wide measurement range, high speed, and good reproducibility, and is widely used in scientific research, medicine, chemical engineering, materials science, and many other fields.

[0003] When a particle size analyzer detects fragile particles or agglomerates, a peristaltic pump is generally used to transport circulating water and the sample in the sampler to the glass window for detection. However, existing peristaltic pumps have the following problems: 1. During sample transport, the water-conducting hose generates heat due to continuous high-frequency friction from the extrusion components, causing the temperature of the circulating water and sample to gradually rise. Consequently, the solubility of dissolved gases in the liquid decreases, resulting in a large number of bubbles precipitating from the liquid phase and entering the detection window with the water flow. These bubbles cause strong scattering interference to the laser beam, leading to a decrease in the detection accuracy of the particle size analyzer.

[0004] 2. After the peristaltic pump has been running for a long time, the water guide hose will gradually wear down and become thinner due to repeated compression. If the compression gap between the extrusion part and the hose is not adjusted in time, the roller will not be able to completely close the inner cavity of the hose, resulting in insufficient pumping pressure and backflow of the medium, which will seriously affect the conveying efficiency and operational stability of the circulation system.

[0005] 3. During operation, the water delivery hose of the existing peristaltic pump needs to withstand high-frequency compression and release dozens or even hundreds of times per minute, which causes the hose material to quickly develop mechanical fatigue and permanent plastic deformation. In order to maintain the system's sealing and delivery accuracy, operators have to frequently stop the machine to replace the hose, which seriously affects the continuity and convenience of the testing work.

[0006] In view of this, we propose a particle size analyzer circulating water conveying device with anti-bubble conveying function. Summary of the Invention

[0007] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a particle size analyzer circulating water conveying device with anti-bubble conveying function, so as to solve the technical problem mentioned in the background art that when conveying circulating water and samples, the temperature rise will cause bubbles to precipitate and flow along the water pipe.

[0008] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a particle size analyzer circulating water conveying device with anti-bubble conveying function, comprising: a housing, a cover plate detachably connected to the housing, a water guiding hose passing through the housing, and a pipe joint fixedly connected to the end of the water guiding hose; The motor is fixedly connected to the rear side of the housing. The housing is rotatably connected to a rotating shaft. The rotating shaft is fixedly connected to the output shaft of the motor. The rotating shaft is fixedly connected to circumferentially spaced guide blocks. The guide blocks are slidably connected to two sliding blocks. A connecting frame is fixed to an adjacent sliding block, and the connecting frame is rotatably connected to an extrusion roller; An adjustment mechanism is provided on the cover plate, and the adjustment mechanism is used to change the squeezing force of the squeezing roller on the water guiding hose; A heat dissipation mechanism is provided on the connecting frame, and the heat dissipation mechanism is used to drive air to flow through the extrusion roller.

[0009] Furthermore, the extrusion roller abuts against the water guiding hose, and the extrusion roller is configured with a hollow structure to facilitate the through-flow of air.

[0010] Furthermore, the adjustment mechanism includes: The system includes three connecting rods, each fixed to the connecting frame. Each connecting rod is slidably connected to a sliding element, and the connecting rods are perpendicular to the extrusion roller. A spring is sleeved on the connecting rod, and its two ends are fixedly connected to the sliding member and the connecting frame, respectively.

[0011] Furthermore, the rotating shaft is rotatably connected to a threaded column, the central axis of the threaded column coincides with the central axis of the rotating shaft, the cover plate is fixedly connected to a threaded shell, the threaded column passes through the threaded shell and the two are threadedly connected, and a knob is fixedly connected to the threaded column.

[0012] Furthermore, the threaded column is rotatably connected to a connecting ring, and the connecting ring and the sliding member are hinged together by a hinge.

[0013] Furthermore, the heat dissipation mechanism includes: The support plate is provided in multiple sets, and each set of the support plate is fixed to the upper and lower sides of the connecting frame, and a rotating column is rotatably connected between two adjacent support plates. The fan blades are provided in multiple form, and the multiple fan blades are fixed to the outside of the rotating shaft.

[0014] Furthermore, the central axis of the rotating column coincides with the central axis of the extrusion roller, an elastic wheel is fixedly connected to the lower end of the rotating column, an annular plate is fixedly connected to the housing, and the elastic wheel abuts against the annular plate.

[0015] Furthermore, it also includes a limit adjustment mechanism, which is disposed in the housing and is used to limit the water guide hose. The limit adjustment mechanism includes: Spring 2 is sleeved on one end of the water guiding hose, and the two ends of spring 2 are respectively fixed to the housing and the adjacent pipe joint; A threaded sleeve is fixed to the housing, and the water-guiding hose passes through the threaded sleeve. The threaded sleeve has symmetrically distributed guide grooves.

[0016] Furthermore, the threaded sleeve is threadedly connected to a threaded ring, the threaded ring is rotatably connected to a rotating ring, and the rotating ring is fixedly connected to two symmetrically distributed limiting blocks. The limiting blocks slide within the guide groove and limit the movement of adjacent pipe fittings.

[0017] Furthermore, the cover plate has multiple through holes on its upper side, and a filter screen is fixedly connected to each of the through holes.

[0018] (III) Beneficial Effects Compared with the prior art, the present invention provides a particle size analyzer circulating water conveying device with anti-bubble conveying function, which has the following beneficial effects: 1. This invention sets the squeezing roller as a hollow structure and configures a heat dissipation mechanism. During the sample transport process, the squeezing roller rotates along the connecting frame to reduce frictional heat generation. At the same time, the fan blades disturb the air flow through the squeezing roller for forced cooling. This effectively prevents air bubbles from being released from the sample due to frictional heating between the water guide hose and the squeezing roller and being transported along the water guide hose. This avoids the interference of air bubbles with laser detection and improves the detection accuracy and reliability of the particle size analyzer.

[0019] 2. This invention, by setting up an adjustment mechanism consisting of a connecting rod, a sliding part, a spring, and a threaded column, utilizes the elasticity of the spring to keep the squeezing roller continuously squeezing the hose after long-term wear and thinning of the water guide hose. When the elasticity of the spring is insufficient, the screw column is driven by the knob to further compress the spring, increasing the squeezing force, effectively preventing backflow caused by insufficient squeezing, and ensuring high sample delivery efficiency and stable flow.

[0020] 3. The present invention uses components such as spring 2, threaded sleeve and limiting block in the limiting adjustment mechanism. After a period of use, the threaded ring can be rotated to drive the limiting block to move, so that the elastic force of spring 2 pushes the water guide hose to slide along the shell, changing the contact position between the hose and the extrusion roller, thereby balancing the wear degree of each section of the hose, extending the replacement cycle of the water guide hose, and reducing the downtime and maintenance costs caused by frequent hose replacement. Attached Figure Description

[0021] Figure 1This is a schematic diagram of a circulating water conveying device for a particle size analyzer with anti-bubble conveying function according to the present invention; Figure 2 This is a bottom view of the housing and motor structure in this invention; Figure 3 This is a schematic diagram of the structure of the shell and the water-conducting hose in this invention; Figure 4 This is a schematic diagram of the structure of the water-conducting hose and pipe connector in this invention; Figure 5 This is a cross-sectional view of the threaded shell in this invention. Figure 6 This is a schematic diagram of the connecting frame and the extrusion roller in this invention; Figure 7 This is a cross-sectional view of the extrusion roller in this invention; Figure 8 This is a bottom view of the elastic wheel and annular plate in this invention. Figure 9 This is a schematic diagram of the structure of spring two and threaded sleeve in this invention; Figure 10 This is a schematic diagram of the rotating ring and the limiting block in this invention.

[0022] In the diagram: 1. Housing; 2. Cover plate; 3. Water guide hose; 4. Pipe connector; 5. Motor; 6. Shaft; 7. Guide block; 8. Sliding block; 9. Connecting frame; 10. Squeeze roller; 11. Connecting rod; 12. Sliding component; 13. Spring 1; 14. Threaded column; 15. Threaded shell; 16. Knob; 17. Connecting ring; 18. Hinge; 19. Support plate; 20. Rotating column; 21. Fan blade; 22. Elastic wheel; 23. Annular plate; 24. Spring 2; 25. Threaded sleeve; 26. Guide groove; 27. Threaded ring; 28. Rotating ring; 29. ​​Limiting block; 30. Filter screen. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0026] This invention provides a circulating water conveying device for a particle size analyzer with anti-bubble conveying function, such as... Figures 1-5 As shown, it includes: housing 1, cover plate 2, water guide hose 3, pipe joint 4, motor 5, rotating shaft 6, guide block 7, sliding block 8, connecting frame 9, extrusion roller 10, adjustment mechanism and heat dissipation mechanism; The housing 1 has a cover plate 2 detachably connected to it. A water-guiding hose 3 runs through the housing 1, and a pipe connector 4 is fixed to the end of the water-guiding hose 3. A motor 5 is fixed to the rear side of the housing 1. A rotating shaft 6 is rotatably connected to the housing 1. The rotating shaft 6 is fixed to the output shaft of the motor 5. A guide block 7 is fixed to the rotating shaft 6 at circumferential intervals. Two sliding blocks 8 are slidably connected to the guide block 7. A connecting frame 9 is fixed to the adjacent sliding block 8. A squeezing roller 10 is rotatably connected to the connecting frame 9. An adjustment mechanism is set on the cover plate 2. The adjustment mechanism is used to change the squeezing force of the squeezing roller 10 on the water-guiding hose 3. A heat dissipation mechanism is set on the connecting frame 9. The heat dissipation mechanism is used to drive air to flow through the squeezing roller 10. The squeezing roller 10 abuts against the water-guiding hose 3. The squeezing roller 10 is set with a hollow structure to facilitate the flow of air.

[0027] In use, the pipe connector 4 is connected to the water supply pipe of the particle size analyzer. By starting the motor 5, the output shaft of the motor 5 drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the squeezing roller 10 to rotate circumferentially through the guide block 7 and the sliding block 8. The three squeezing rollers 10 rotate circumferentially and alternately squeeze the water supply hose. The squeezing rollers 10 rotate along the connecting frame 9, thereby reducing the heat generated by the friction between the squeezing rollers 10 and the water supply hose 3, preventing air bubbles from precipitating from the sample and being transported to the glass window along the water supply hose 3, which would affect the detection accuracy. During the above process, the sample in the particle size analyzer's sample feeder is transported to the glass window for continuous laser detection.

[0028] During the above process, the squeezing force of the squeezing roller 10 on the water guide hose 3 is changed by the adjustment mechanism, and air is allowed to flow through the squeezing roller 10 under the action of the heat dissipation mechanism to continuously cool the squeezing roller 10.

[0029] like Figure 7 and Figure 8 As shown, the adjustment mechanism includes: a connecting rod 11, a sliding member 12, a spring 13, a threaded column 14, a threaded shell 15, a knob 16, a connecting ring 17, and a hinge 18; Three connecting rods 11 are provided, and the three connecting rods 11 are respectively fixed to the connecting frame 9. The connecting rods 11 are slidably connected to the sliding member 12. The connecting rods 11 are perpendicular to the extrusion roller 10. Spring 13 is sleeved on the connecting rod 11. The two ends of the spring 13 are respectively fixed to the sliding member 12 and the connecting frame 9. The rotating shaft 6 is rotatably connected to the threaded column 14. The central axis of the threaded column 14 coincides with the central axis of the rotating shaft 6. The cover plate 2 is fixedly connected to the threaded shell 15. The threaded column 14 passes through the threaded shell 15 and the two are threadedly connected. The threaded column 14 is fixedly connected to the knob 16. The threaded column 14 is rotatably connected to the connecting ring 17. The connecting ring 17 and the sliding member 12 are hinged to each other by a hinge member 18.

[0030] After a period of use, when the hose becomes worn and thin, the spring force of spring 13 causes the squeezing roller 10 to continuously squeeze the water-conducting hose 3. When the spring force of spring 13 is insufficient to support the squeezing force between the squeezing roller 10 and the water-conducting hose 3, the knob 16 is turned, causing the threaded column 14 to rotate along the rotating shaft 6. The threaded column 14 rotates along the threaded shell 15, and the threaded column 14 drives the connecting ring 17 to move downward. The connecting ring 17 pushes the sliding member 12 to slide along the connecting rod 11 through the hinge 18, further compressing the spring 13. This causes the spring force of spring 13 to act on the squeezing roller 10, increasing the squeezing force between the squeezing roller 10 and the water-conducting hose 3, preventing the squeezing force between the squeezing roller 10 and the water-conducting hose 3 from being too small, which would lead to a decrease and instability in the flow rate of the sample transported by the water-conducting hose 3.

[0031] like Figure 1 , Figure 9 and Figure 10 As shown, the heat dissipation mechanism includes: a support plate 19, a rotating column 20, a fan blade 21, an elastic wheel 22, and an annular plate 23; Multiple sets of support plates 19 are provided, and each set of support plates 19 is fixed to the upper and lower sides of the connecting frame 9 respectively. A rotating column 20 is rotatably connected between two adjacent support plates 19. Multiple fan blades 21 are provided, and multiple fan blades 21 are fixed to the outside of the rotating shaft 6. The central axis of the rotating column 20 coincides with the central axis of the extrusion roller 10. An elastic wheel 22 is fixed to the lower end of the rotating column 20. An annular plate 23 is fixed to the housing 1. The elastic wheel 22 abuts against the annular plate 23.

[0032] During the circumferential rotation of the rotating shaft 6, the connecting frame 9 drives the rotating column 20 to rotate circumferentially through the support plate 19. The rotating column 20 drives the elastic wheel 22 to rotate circumferentially along the annular plate 23. The elastic wheel 22 drives the rotating column 20 to rotate, and the rotating column 20 drives the fan blade 21 on it to rotate, thereby disturbing the air inside the housing 1. Under the action of the fan blade 21, the air flows through the squeezing roller 10, which improves the heat dissipation effect of the squeezing roller 10 and prevents the temperature between the squeezing roller 10 and the water guide hose 3 from rising, which would cause gas to be released from the sample.

[0033] like Figures 2-5 As shown, it also includes a limit adjustment mechanism, which is disposed in the housing 1. The limit adjustment mechanism is used to limit the water guide hose 3. The limit adjustment mechanism includes: spring 24, threaded sleeve 25, guide groove 26, threaded ring 27, connecting ring 17, limit block 29 and filter screen 30. Spring 24 is sleeved on one end of the water guide hose 3, and the two ends of spring 24 are fixedly connected to the housing 1 and the adjacent pipe joint 4 respectively; threaded sleeve 25 is fixedly connected to the housing 1, and the water guide hose 3 passes through the threaded sleeve 25. The threaded sleeve 25 has symmetrically distributed guide grooves 26; the threaded sleeve 25 is threadedly connected to a threaded ring 27, and the threaded ring 27 is rotatably connected to a rotating ring 28. The rotating ring 28 is fixedly connected to two symmetrically distributed limiting blocks 29. The limiting blocks 29 slide within the guide grooves 26 and limit the adjacent pipe joint 4; the upper side of the cover plate 2 has multiple through holes, and a filter screen 30 is fixedly connected to the through holes of the cover plate 2.

[0034] In the initial state, spring 24 is compressed and limit block 29 limits pipe joint 4. After a period of use, rotate threaded ring 27 to rotate along threaded sleeve 25. Threaded ring 27 drives rotating ring 28 to move. Rotating ring 28 drives limit block 29 to slide along guide groove 26. Under the elastic force of spring 24, water guide hose 3 slides along threaded sleeve 25 and housing 1, thereby changing the contact position between water guide hose 3 and extrusion roller 10, thus ensuring the performance of water guide hose 3 and extending the replacement interval of water guide hose 3.

[0035] Working principle of the invention: When using this device, connect the pipe connector 4 to the circulating water delivery pipe of the particle size analyzer, start the output shaft of the motor 5 to drive the rotating shaft 6 to rotate along the housing 1, the rotating shaft 6 drives the connecting frame 9 and the squeezing roller 10 to rotate circumferentially through the guide block 7 and the sliding block 8, the squeezing roller 10 squeezes the water delivery hose 3, and the water delivery hose 3 delivers the sample in the particle size analyzer's sample feeder.

[0036] During the above process, the squeezing roller 10 rotates circumferentially along the connecting frame 9, thereby preventing the squeezing roller 10 from directly rubbing against the water guiding hose 3, which would cause the squeezing roller 10 and the water guiding hose 3 to rise in temperature, preventing air bubbles in the sample from precipitating and being transported along the water guiding hose 3, thus affecting the detection accuracy of the particle size analyzer. During the rotation of the rotating shaft 6, the rotating shaft 6 rotates relative to the threaded column 14, and the connecting frame 9 drives the connecting ring 17 to rotate circumferentially along the threaded column 14 through the hinge 18.

[0037] Under the elastic force of spring 13, the squeezing roller 10 maintains the squeezing pressure between it and the water guide hose 3 to ensure the conveying stability of the water guide hose 3. When the elastic force of spring 13 is insufficient to support the squeezing pressure between the squeezing roller 10 and the water guide hose 3, the knob 16 is turned. The knob 16 drives the threaded column 14 to rotate along the threaded shell 15. The threaded column 14 moves downward along the rotating shaft 6. The threaded column 14 drives the connecting ring 17 to move downward. The connecting ring 17 drives the sliding member 12 to slide along the connecting rod 11 through the hinge 18, compressing the spring 13 and increasing the squeezing pressure between the squeezing roller 10 and the water guide hose 3. The connecting frame 9 slides along the guide block 7 through the sliding block 8.

[0038] During the circumferential rotation of the extrusion roller 10, the elastic wheel 22 rotates circumferentially along the annular plate 23. When the connecting frame 9 drives the frame extrusion roller 10 to move, the extrusion pressure between the elastic wheel 22 and the annular plate 23 increases, and the elastic wheel 22 deforms. The elastic wheel 22 is always in contact with the annular plate 23, and the elastic wheel 22 drives the fan blade 21 on it to rotate circumferentially, thereby disturbing the airflow through the extrusion roller 10 and dissipating heat and cooling the extrusion roller 10.

[0039] After a period of use, rotating the threaded ring 27 causes the rotating ring 28 to move along the threaded sleeve 25. The rotating ring 28 causes the limiting block 29 to slide along the guide groove 26. Under the elastic force of the second spring 24, the water guide hose 3 slides along the housing 1, changing the squeezing position between the water guide hose 3 and the squeezing roller 10, thereby ensuring the performance of the water guide hose 3 and extending the replacement interval of the water guide hose 3. Furthermore, under the action of the through hole of the cover plate 2, the air inside the housing 1 exchanges with the outside air, maintaining a stable temperature. Under the action of the filter screen 30, the dust in the air is filtered.

[0040] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. These will not be elaborated here. For all fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A circulating water conveying device for a particle size analyzer with anti-bubble conveying function, characterized in that, include: The housing (1) has a cover plate (2) detachably connected to it, and a water guide hose (3) runs through the housing (1). A pipe joint (4) is fixed to the end of the water guide hose (3). The motor (5) is fixed to the rear side of the housing (1). The housing (1) is rotatably connected to a rotating shaft (6). The rotating shaft (6) is fixed to the output shaft of the motor (5). The rotating shaft (6) is fixed to a guide block (7) that is circumferentially spaced. The guide block (7) is slidably connected to two sliding blocks (8). A connecting frame (9) is fixed to an adjacent sliding block (8), and the connecting frame (9) is rotatably connected to a pressing roller (10). An adjustment mechanism is provided on the cover plate (2), and the adjustment mechanism is used to change the squeezing force of the squeezing roller (10) on the water guide hose (3); A heat dissipation mechanism is provided on the connecting frame (9), which is used to drive air to flow through the extrusion roller (10).

2. The particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 1, characterized in that, The squeezing roller (10) abuts against the water guiding hose (3), and the squeezing roller (10) is configured as a hollow structure to facilitate air flow.

3. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 1, characterized in that, The adjustment mechanism includes: There are three connecting rods (11), which are respectively fixed to the connecting frame (9). The connecting rods (11) are slidably connected to the sliding member (12). The connecting rods (11) are perpendicular to the extrusion roller (10). Spring 1 (13) is sleeved on the connecting rod (11), and the two ends of the spring 1 (13) are respectively fixed to the sliding member (12) and the connecting frame (9).

4. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 3, characterized in that, The rotating shaft (6) is rotatably connected to a threaded column (14), the central axis of the threaded column (14) coincides with the central axis of the rotating shaft (6), the cover plate (2) is fixedly connected to a threaded shell (15), the threaded column (14) passes through the threaded shell (15) and the two are threadedly connected, and the threaded column (14) is fixedly connected to a knob (16).

5. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 4, characterized in that, The threaded column (14) is rotatably connected to a connecting ring (17), and a hinge (18) is hinged between the connecting ring (17) and the sliding member (12).

6. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 2, characterized in that, The heat dissipation mechanism includes: Support plates (19) are provided in multiple sets. Each set of support plates (19) is fixed to the upper and lower sides of the connecting frame (9). A rotating column (20) is rotatably connected between two adjacent support plates (19). The fan blades (21) are provided in multiple ways, and the multiple fan blades (21) are fixed to the outside of the rotating shaft (6).

7. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 6, characterized in that, The central axis of the rotating column (20) coincides with the central axis of the extrusion roller (10). An elastic wheel (22) is fixedly connected to the lower end of the rotating column (20). An annular plate (23) is fixedly connected to the housing (1). The elastic wheel (22) abuts against the annular plate (23).

8. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 1, characterized in that, It also includes a limit adjustment mechanism, which is disposed in the housing (1). The limit adjustment mechanism is used to limit the water guide hose (3). The limit adjustment mechanism includes: Spring 2 (24) is sleeved on one end of the water guide hose (3), and the two ends of the spring 2 (24) are respectively fixed to the housing (1) and the adjacent pipe joint (4); A threaded sleeve (25) is fixed to the housing (1), and the water guide hose (3) passes through the threaded sleeve (25). The threaded sleeve (25) has symmetrically distributed guide grooves (26).

9. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 8, characterized in that, The threaded sleeve (25) is threadedly connected to a threaded ring (27), and the threaded ring (27) is rotatably connected to a rotating ring (28). The rotating ring (28) is fixedly connected to two symmetrically distributed limiting blocks (29). The limiting blocks (29) slide within the guide groove (26) and limit the adjacent pipe joint (4).

10. A particle size analyzer circulating water conveying device with anti-bubble conveying function according to claim 1, characterized in that, The cover plate (2) has multiple through holes on its upper side, and a filter screen (30) is fixedly connected to the through holes of the cover plate (2).

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