Viscometer lifting device

Abstract

The viscometer lifting device comprises a bottom frame, a guide rod is vertically fixed on the bottom frame, a lifting sleeve is arranged on the guide rod in a sliding manner, a locking rod for locking the sliding of the lifting sleeve is arranged on one side of the lifting sleeve, and a plurality of grooves matched with the locking rod for locking are formed in one side of the guide rod; a speed regulating rod is further movably arranged on the lifting sleeve, a speed regulating button is fixed to the end, extending out of the lifting sleeve, of the speed regulating rod, the other end of the speed regulating rod is sleeved with a gear, and the guide rod is provided with a rack matched with the gear; a clamping jaw is arranged on one side of the lifting sleeve. The viscometer is stably clamped by the device, self-locking is convenient in the experiment process, the viscometer is more stably lifted and can accurately reach the required height, and the stability and the accuracy of the experiment are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of viscometer equipment, in particular to a viscometer lifting device. Background Art

[0002] Viscometer is an instrument for measuring the viscosity of a sample. When a fluid flows under the action of an external force, there is a tangential internal friction between the flowing liquid layers. If the liquid is to pass through the tube, a part of the work must be consumed to overcome the resistance to this flow. When the flow rate is low, the liquid in the tube moves along a straight line parallel to the tube wall. The liquid closest to the tube wall is actually stationary. The farther away from the tube wall, the faster it flows. The tangential force between the flow layers is proportional to the contact area and velocity difference between the two layers, and inversely proportional to the distance between the two layers. This coefficient is called the viscosity coefficient of the liquid, or viscosity for short.

[0003] When measuring the sample, the measured liquid level cannot exceed the mark line on the tube wall. When measuring viscosity, the existing instrument will sink into the water bath only after adding the sample. The viscometer is fixed by a rope, which cannot be fixed and floats in the water bath, resulting in measurement errors. Therefore, a lifting device is needed that can drive the viscometer to rise and fall smoothly and accurately reach the required position for the experiment. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned prior art, a viscometer lifting device is provided. The device stably clamps the viscometer, is self-locking and convenient during the experiment, and makes the viscometer more stable to lift and lower, and can accurately reach the required height, greatly improving the stability and accuracy of the experiment.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The utility model proposes a viscometer lifting device, comprising a base frame, a guide rod is vertically fixed on the base frame, a lifting sleeve is slidably provided on the guide rod, a locking rod is slidably provided on one side of the lifting sleeve for locking the sliding of the lifting sleeve, a plurality of grooves for locking with the locking rod are provided on one side of the guide rod; a speed regulating rod is also movably provided on the lifting sleeve, a speed regulating knob is fixed on one end of the speed regulating rod extending out of the lifting sleeve, a gear is sleeved on the other end of the speed regulating rod, and the guide rod is provided with a rack matched with the gear; a clamping claw is provided on one side of the lifting sleeve.

[0007] Preferably, the speed regulating rod is slidably arranged on the lifting sleeve, the gear includes a large gear and a small gear, the rack includes a small rack and a large rack, the small rack cooperates with the small gear, and the large rack cooperates with the large gear, when the speed regulating rod is slid to the first position, the large rack is meshed with the large gear, and the small rack is separated from the small gear, when the speed regulating rod is slid to the second position, the large rack is separated from the large gear, and the small rack is meshed with the small gear.

[0008] Preferably, the lifting sleeve is slidably connected to a reset rod, and a reversing wheel is rotatably connected inside the lifting sleeve, and two ends of the reversing wheel are respectively engaged with the reset rod and the locking rod.

[0009] Preferably, a locking button is fixed to one end of the reset rod passing through the lifting sleeve, and a spring is arranged between the locking button and the lifting sleeve.

[0010] Preferably, the clamping claw comprises a fixed claw fixedly connected to the lifting sleeve, the fixed claw is rotatably connected to a movable claw via a rotating shaft, and a clamping spring is provided between the movable claw and the fixed claw.

[0011] Preferably, both the movable claw and the fixed claw are provided with anti-slip pads.

[0012] Preferably, the anti-slip pad is provided with a clamping groove for convenient clamping.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is provided with a locking rod, which can lock the lifting sleeve on the guide rod to prevent it from sliding up and down during the experiment. The guide rod is provided with a plurality of corresponding grooves to ensure that the lifting sleeve can be locked at a required height; and the lifting and lowering are adjusted by the gear and rack, so that the lifting and lowering of the viscometer is more stable, reducing the experimental error.

[0015] 2. The utility model is provided with a speed regulating knob, and the speed regulating knob is coaxially fixed with large and small gears. The large gear can drive the lifting sleeve to move quickly, and the small gear can drive the lifting sleeve to move slowly. The large gear ensures that the required approximate position is reached quickly, and the small gear ensures fine-tuning when approaching the required height, so that the height positioning of the entire viscometer is more accurate.

[0016] 3. The utility model is provided with a clamping jaw, and an anti-skid pad is provided on the clamping jaw, which can prevent the viscometer from sliding after being clamped, and the anti-skid pad is provided with a groove corresponding to the viscometer, thereby clamping the viscometer more firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is the front view of the utility model;

[0020] Figure 3 yes Figure 1 A partial cross-sectional view of the middle lifting sleeve;

[0021] Figure 4 yes Figure 3 Middle AA section cutaway view;

[0022] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle clamping jaw.

[0023] Description of reference numerals:

[0024] 1. Base frame; 2. Guide rod; 3. Lifting sleeve; 4. Locking rod; 5. Groove; 6. Speed ​​regulating rod; 7. Speed ​​regulating knob; 8. Large gear; 9. Small gear; 10. Small rack; 11. Reset rod; 12. Reversing wheel; 13. Locking knob; 14. Spring; 15. Fixed claw; 16. Movable claw; 17. Clamping spring; 18. Anti-slip pad; 19. Clamping groove; 20. Rotating shaft; 21. Water bath; 22. Viscometer; 23. Clamping jaw; 24. Large rack. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] like Figure 1-Figure 5 As shown, this embodiment provides a viscometer lifting device, which includes a base frame 1, a guide rod 2, a sliding sleeve 3 and a clamping claw 23.

[0027] A guide rod 2 is vertically fixed on the base frame 1, and a lifting sleeve 3 is slidably provided on the guide rod 2. A locking rod 4 and a reset rod 11 are slidably connected on one side of the lifting sleeve 3. A locking button 13 is fixed on one end of the reset rod 11 passing through the lifting sleeve 3. A spring 14 is arranged between the locking button 13 and the lifting sleeve 3. A reversing wheel 12 is also rotatably connected in the lifting sleeve 3. The two ends of the reversing wheel 12 are respectively engaged with the reset rod 11 and the locking rod 4. A plurality of grooves 5 for locking with the locking rod 4 are provided on one side of the guide rod 2; a chamfer is provided on one end of the locking rod 4 that cooperates with the groove 5 for convenient insertion; the locking button 13 is arranged on one side of the sliding sleeve, so that the user can press the locking button 13 with one hand to unlock it, and the sliding sleeve 3 is in a state of being pinched by the fingers, and the cross-section of the guide rod 2 is basically square, which can ensure that the deflection and vibration of the lifting sleeve are greatly reduced during the lifting, unlocking and locking processes.

[0028] A speed regulating rod 6 is also provided on the lifting sleeve 3, and the speed regulating rod 6 is slidably connected to the lifting sleeve 3. A speed regulating knob 7 is fixed on one end of the speed regulating rod 6 extending out of the lifting sleeve 3, and a large gear 8 and a small gear 9 are sleeved on the other end of the speed regulating rod 6. The guide rod 2 is provided with a small rack 10 and a large rack 24, and the small rack 10 cooperates with the small gear 9, and the large rack 24 cooperates with the large gear 8. When the speed regulating rod 6 is slid to the first position, the large rack 24 is meshed with the large gear 8, and the small rack 10 is separated from the small gear 9. When the speed regulating rod 6 is slid to the second position, the large rack 24 is separated from the large gear 8, and the small rack 10 is meshed with the small gear 9. The rotation and lifting of the gear and the rack make the viscometer rise and fall more smoothly, avoiding poor reproducibility caused by the instability of the viscometer. Moreover, when the large gear 8 is meshed with the large rack 24, the viscometer 22 can be quickly and smoothly lowered to the required height. When the small gear 10 is meshed with the small rack 9, the height of the viscometer 22 is fine-tuned to make the height more accurate and reduce experimental variables.

[0029] A clamping jaw 23 is also fixed to one side of the sliding sleeve 3. The clamping jaw 23 includes a fixed jaw 15 fixedly connected to the lifting sleeve 3. One side of the fixed jaw 15 is rotatably connected to a movable jaw 16 via a rotating shaft 20. A clamping spring 17 is fixedly arranged between the movable jaw 16 and the fixed jaw 15.

[0030] The movable claw 16 and the fixed claw 15 are both bonded with an anti-skid pad 18 , and the anti-skid pad 18 is provided with a clamping groove 19 for convenient clamping.

[0031] Specific working process:

[0032] S1: Press the locking button 13, which drives the reset rod 11 to slide into the lifting sleeve 3. The spring 14 is compressed at this time, and the reset rod 11 drives the reversing wheel 12 to rotate. The reversing wheel 12 drives the locking rod 4 to slide in the opposite direction of the movement direction of the reset rod 11. The locking rod 4 slides out of the groove 5, and the lifting sleeve 3 is unlocked.

[0033] S2: Push the speed regulating knob to drive the large gear 8 and the small gear 9 to slide inward through the speed regulating rod 6. At this time, the large gear 8 is meshed with the large rack 24, and the small rack 9 is disengaged from the small rack 10. Then turn the speed regulating knob 7 to make the lifting sleeve 3 rise to the top quickly, and then release the locking button 13 to re-lock the lifting sleeve 3 at the top.

[0034] S3: Pinch the movable claw 16 by hand, and the movable claw 16 rotates around the rotating shaft 20, and the clamping spring 17 is compressed. Then, the viscometer 22 is placed in the clamping groove 19 of the anti-slip pad 18, and the movable claw 16 is released. The clamping spring 17 pushes the movable claw 16 to rotate around the rotating shaft 20, and the viscometer 22 is clamped.

[0035] S4: Place experimental water in the water bath 21 and stabilize the water bath temperature to the measured temperature (25±0.05℃). Press the locking button 13 to unlock the lifting sleeve 3, then turn the speed regulating button 7 to quickly and smoothly lower the lifting sleeve 3 to the required height. Then pull the speed regulating button 7 outward. At this time, the large gear 8 is disengaged from the large rack 24, and the small rack 9 is engaged with the small rack 10. Turn the speed regulating button 7 to slowly adjust the height of the lifting sleeve 3 to accurately reach the required height. Release the locking button 13 after it is in place to complete the positioning of the lifting sleeve 3 and start the experiment.

[0036] The viscosity measurement results are greatly affected by human operation and may have poor reproducibility. The reason may be that the viscometer is unstable during the measurement process. When the device is used for sample measurement, it avoids improper human operation during the experiment, reduces the difficulty of operation for experimenters, and improves the reliability and reproducibility of sample measurement results. During the experiment, it avoids vibration and collision of the viscometer caused by other reasons, greatly improves the accuracy of the measurement results, and reduces the waste of experimental consumables.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A viscometer lifting device, comprising a base frame (1), characterized in that: A guide rod (2) is vertically fixed on the base frame (1), a lifting sleeve (3) is slidably mounted on the guide rod (2), a locking rod (4) is slidably mounted on one side of the lifting sleeve (3) for locking the sliding of the lifting sleeve (3), and a plurality of grooves (5) for cooperating with the locking rod (4) for locking are provided on one side of the guide rod (2); a speed regulating rod (6) is also movably mounted on the lifting sleeve (3), a speed regulating knob (7) is fixed to one end of the speed regulating rod (6) extending out of the lifting sleeve (3), a gear is sleeved on the other end of the speed regulating rod (6), and a rack cooperating with the gear is provided on the guide rod (2); and a clamping claw (23) is provided on one side of the lifting sleeve (3).

2. The viscometer lifting device according to claim 1, characterized in that: The speed regulating rod (6) is slidably arranged on the lifting sleeve (3); the gear comprises a large gear (8) and a small gear (9); the rack comprises a small rack (10) and a large rack (24); the small rack (10) cooperates with the small gear (9); the large rack (24) cooperates with the large gear (8); when the speed regulating rod (6) is slid to a first position, the large rack (24) is meshed with the large gear (8), and the small rack (10) is separated from the small gear (9); when the speed regulating rod (6) is slid to a second position, the large rack (24) is separated from the large gear (8), and the small rack (10) is meshed with the small gear (9).

3. The viscometer lifting device according to claim 1, characterized in that: The lifting sleeve (3) is slidably connected to a reset rod (11), and a reversing wheel (12) is rotatably connected inside the lifting sleeve (3), and two ends of the reversing wheel (12) are respectively engaged with the reset rod (11) and the locking rod (4).

4. The viscometer lifting device according to claim 3, characterized in that: A locking button (13) is fixed to one end of the reset rod (11) that passes through the lifting sleeve (3), and a spring (14) is provided between the locking button (13) and the lifting sleeve (3).

5. The viscometer lifting device according to claim 1, characterized in that: The clamping claw (23) comprises a fixed claw (15) fixedly connected to the lifting sleeve (3); the fixed claw (15) is rotatably connected to a movable claw (16) via a rotating shaft (20); a clamping spring (17) is provided between the movable claw (16) and the fixed claw (15).

6. The viscometer lifting device according to claim 5, characterized in that: The movable claw (16) and the fixed claw (15) are both provided with anti-slip pads (18).

7. The viscometer lifting device according to claim 6, characterized in that: The anti-slip pad (18) is provided with a clamping groove (19) for convenient clamping.

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