Quantitative titrator

Abstract

The utility model discloses a quantitative titrator which comprises a quantitative cylinder, a piston rod extending to the outer side is connected to an inner cavity of the quantitative cylinder in a sliding mode, a pull piece is fixedly connected to the top of the piston rod, a guide column is fixedly connected to the bottom of the pull piece, and the guide column is located on the right side of the quantitative cylinder. A sliding block is slidably connected to the surface of the guide column, a locking column is rotatably connected to the right side of the sliding block, and the left side of the locking column extends to an inner cavity of the sliding block. According to the quantitative titrator, after the conduit is inserted into the solution bottle, the threaded cylinder slides to adjust the position of the pressing block, and then the threaded disc is rotated to drive the sliding sleeve to slide downwards, so that the pressing block is driven to slide back to back to abut against the bottle opening of the solution bottle, and the quantitative titrator is fixed in the solution bottle and can be adapted to the solution bottles with different calibers; therefore, the purposes of adapting to solution bottles with different calibers and improving the applicability can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical glass instruments, in particular to a quantitative titrator. Background Art

[0002] In chemical experiments, multiple groups of experiments need to be carried out simultaneously, and the differences can be found through comparison. In batch experiments, in order to increase the speed of solution addition, a glass quantitative titrator is used, which can add liquid in batches multiple times and ensure that the volume of liquid added each time is the same, thereby avoiding errors caused by human repetitiveness.

[0003] However, the glass quantitative burette is generally used in conjunction with a solution bottle, but the sizes of the liquid bottles in the laboratory are different, resulting in different sizes of the bottle mouths of the liquid bottles, which in turn causes a glass quantitative burette to be unable to adapt to different liquid bottles. Therefore, a quantitative burette needs to be designed to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a quantitative titrator to solve the technical problems mentioned in the above background technology.

[0005] The utility model solves the above technical problems with the following technical solutions: a quantitative titrator, comprising a quantitative cylinder: the inner cavity of the quantitative cylinder is slidably connected to a piston rod extending to the outside, the top of the piston rod is fixedly connected to a pull tab, the bottom of the pull tab is fixedly connected to a guide column, the guide column is located on the right side of the quantitative cylinder, the surface of the guide column is slidably connected to a sliding block, the right side of the sliding block is rotatably connected to a locking column, the left side of the locking column extends to the inner cavity of the sliding block, the right side of the locking column is in contact with the left side of the guide column, the bottom of the surface of the quantitative cylinder is connected to a liquid outlet, the front side of the surface of the quantitative cylinder and the front side of the guide column are both provided with the same scale line, the bottom of the quantitative cylinder is connected to a catheter, The inner cavity of the liquid outlet nozzle close to the quantitative cylinder side and the inner cavity at the top of the catheter are both equipped with a one-way valve device, the surface of the catheter is sleeved with a threaded cylinder, the outer surface of the threaded cylinder is slidably connected with a sliding sleeve, the outer surface of the threaded cylinder is threadedly connected with a threaded disk, the threaded disk is located at the top of the sliding sleeve, the bottom of the surface of the threaded cylinder is fixedly connected with a fixed sleeve, the surface of the fixed sleeve is rotatably connected with three sliding and rotating rods, the surface of the sliding sleeve is rotatably connected with three rotating rods, the sliding and rotating rods are rotatably connected to the rotating rods, the end of the rotating rod away from the sliding sleeve is rotatably connected to a pressing block, the end of the sliding and rotating rod away from the fixed sleeve is fixedly connected to the sliding rod, and the sliding rod slides in the inner cavity of the pressing block.

[0006] Preferably, a rotating cap is fixedly connected to the right side of the locking column, and a plurality of protruding patterns are provided on the surface of the rotating cap.

[0007] Preferably, an elastic tube is bonded to the inner cavity of the threaded tube, and the catheter slides in the inner cavity of the elastic tube.

[0008] Preferably, a sliding groove for the sliding rod to slide is formed through the surface of the sliding rod.

[0009] Preferably, a sponge pad is bonded to the opposite side of the pressing block.

[0010] Preferably, a plurality of through holes are formed on the surface of the bottom of the conduit.

[0011] 1. The beneficial effects of the utility model are as follows: after the catheter is inserted into the solution bottle, the threaded barrel is slid to adjust the position of the pressing block, and then the threaded disc is rotated to drive the sliding sleeve to slide downward, thereby driving the pressing block to slide back and forth against the bottle mouth of the solution bottle, thereby fixing the quantitative titrator in the solution bottle. The device can be adapted to solution bottles of different calibers, thereby achieving the purpose of adapting to solution bottles of different calibers and improving applicability.

[0012] 2. The utility model provides a rotating cap, and by rotating the rotating cap, the locking column is driven to rotate, so that the locking column locks the sliding block to the surface of the guide column, which makes it easy to rotate the locking column.

[0013] 3. The utility model can protect the catheter by setting the elastic cylinder, avoid the damage of the catheter caused by the threaded cylinder, and at the same time increase the friction of the threaded cylinder sliding on the surface of the catheter, so as to facilitate the user to rotate the threaded disk.

[0014] 4. The utility model can protect the solution bottle mouth when the pressure block presses against the solution bottle mouth through the provision of the sponge pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only schematic and do not limit the present invention, wherein:

[0016] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0017] Figure 2 This is a partial cross-sectional view of a front view of an embodiment of the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Dosing cylinder, 2. Piston rod, 3. Pull piece, 4. Guide column, 5. Sliding block, 6. Locking column, 7. Rotating cap, 8. Liquid outlet, 9. Scale line, 10. Catheter, 11. Threaded cylinder, 12. Elastic cylinder, 13. Sliding sleeve, 14. Fixed sleeve, 15. Sliding rotating rod, 16. Rotating rod, 17. Pressing block, 18. Sliding rod, 19. Slide groove, 20. Sponge pad, 21. Threaded disk, 22. Through hole. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the quantitative titrator of the present invention will be described with reference to the accompanying drawings.

[0021] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0022] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structure of various components of the embodiments of the utility model, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0023] Figure 1-2A quantitative titrator according to an embodiment of the utility model is shown, which comprises a quantitative cylinder 1: the inner cavity of the quantitative cylinder 1 is slidably connected with a piston rod 2 extending to the outside, the top of the piston rod 2 is fixedly connected with a pull tab 3, the bottom of the pull tab 3 is fixedly connected with a guide column 4, the guide column 4 is located on the right side of the quantitative cylinder 1, the surface of the guide column 4 is slidably connected with a sliding block 5, the right side of the sliding block 5 is rotatably connected with a locking column 6, the left side of the locking column 6 extends to the inner cavity of the sliding block 5, the right side of the locking column 6 is in contact with the left side of the guide column 4, the right side of the locking column 6 is fixedly connected with a rotating cap 7, and the surface of the rotating cap 7 is provided with a plurality of convex patterns, By setting the rotating cap 7, the locking column 6 is driven to rotate by rotating the rotating cap 7, so that the locking column 6 locks the sliding block 5 to the surface of the guide column 4, which can facilitate the rotation of the locking column 6. The bottom of the surface of the quantitative cylinder 1 is connected with a liquid outlet 8, and the front side of the surface of the quantitative cylinder 1 and the front side of the guide column 4 are both provided with the same scale line 9. The bottom of the quantitative cylinder 1 is connected with a catheter 10, and the inner cavity of the liquid outlet nozzle 8 close to the side of the quantitative cylinder 1 and the inner cavity of the top of the catheter 10 are both installed with a one-way valve device. The surface of the catheter 10 is sleeved with a threaded cylinder 11, and the inner cavity of the threaded cylinder 11 is bonded with an elastic cylinder 12. The catheter 10 is in the elastic cylinder The inner cavity of 12 slides, and the setting of the elastic tube 12 can protect the catheter 10, avoid the damage of the catheter 10 caused by the threaded tube 11, and at the same time increase the friction of the threaded tube 11 sliding on the surface of the catheter 10, so as to facilitate the user to rotate the threaded disk 21, the outer surface of the threaded tube 11 is slidably connected with a sliding sleeve 13, the outer surface of the threaded tube 11 is threadedly connected with a threaded disk 21, the threaded disk 21 is located at the top of the sliding sleeve 13, the bottom of the surface of the threaded tube 11 is fixedly connected with a fixed sleeve 14, the surface of the fixed sleeve 14 is rotatably connected with three sliding rotation rods 15, and the surface of the sliding sleeve 13 is rotatably connected with three A rotating rod 16 is provided, the sliding rotating rod 15 and the rotating rod 16 are rotatably connected, the end of the rotating rod 16 away from the sliding sleeve 13 is rotatably connected to a pressing block 17, the end of the sliding rotating rod 15 away from the fixed sleeve 14 is fixedly connected to a sliding rod 18, the sliding rod 18 slides in the inner cavity of the pressing block 17, and a sliding groove 19 for sliding the sliding rod 18 is provided on the surface of the sliding rod 18, and a sponge pad 20 is bonded to the opposite side of the pressing block 17. Through the arrangement of the sponge pad 20, when the pressing block 17 presses against the solution bottle mouth, the solution bottle mouth can be protected, and a plurality of through holes 22 are provided on the surface of the bottom of the catheter 10.

[0024] Working principle: When the utility model is used, the user inserts the catheter 10 into the solution bottle, makes the bottom of the catheter 10 press against the bottom of the inner cavity of the solution bottle, then slides the threaded tube 11 to adjust the position of the pressing block 17, makes the pressing block 17 align with the solution bottle mouth, then rotates the threaded disk 21 to drive the threaded disk 21 to slide downward on the surface of the threaded tube 11, thereby driving the sliding sleeve 13 to slide downward, and then drives the sliding rotating rod 15 and the rotating rod 16 to rotate, and then drives the three pressing blocks 17 to slide back to each other and press against the bottle mouth of the solution bottle. At this time, the sliding rod 18 slides in the inner cavity of the slide groove 19 in the pressing block 17 to fix the quantitative titrator in the solution bottle, and then slides the sliding block 5 according to the volume of the required capacity, makes the sliding block 5 slide to the corresponding scale, and then pulls the pull tab 3 to extract the solution in the solution bottle into the inner cavity of the quantitative cylinder 1, and quantitatively titrates it out from the liquid outlet nozzle 8. The device can be adapted to solution bottles with different calibers, thereby improving the applicability of the quantitative titrator.

[0025] In summary, the quantitative titrator is configured by inserting the catheter 10 into the solution bottle, sliding the threaded barrel 11 to adjust the position of the pressing block 17, and then rotating the threaded disk 21 to drive the sliding sleeve 13 to slide downward, thereby driving the pressing block 17 to slide back and forth against the bottle mouth of the solution bottle, thereby fixing the quantitative titrator in the solution bottle. The device can be adapted to solution bottles of different calibers, thereby achieving the purpose of adapting to solution bottles of different calibers and improving applicability.

[0026] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the utility model to achieve the purpose of the utility model.

Claims

1. A quantitative titrator, characterized in that: The invention comprises a quantitative cylinder (1): the inner cavity of the quantitative cylinder (1) is slidably connected to a piston rod (2) extending to the outside, the top of the piston rod (2) is fixedly connected to a pull tab (3), the bottom of the pull tab (3) is fixedly connected to a guide column (4), the guide column (4) is located on the right side of the quantitative cylinder (1), the surface of the guide column (4) is slidably connected to a sliding block (5), the right side of the sliding block (5) is rotatably connected to a locking column (6), the left side of the locking column (6) extends to the inner cavity of the sliding block (5), the right side of the locking column (6) contacts the left side of the guide column (4), the bottom of the surface of the quantitative cylinder (1) is connected to a liquid outlet nozzle (8), the front side of the surface of the quantitative cylinder (1) and the front side of the guide column (4) are both provided with the same scale line (9), the bottom of the quantitative cylinder (1) is connected to a catheter (10), the inner cavity of the liquid outlet nozzle (8) close to one side of the quantitative cylinder (1) and the inner cavity of the top of the catheter (10) are connected to the inner cavity of the top of the catheter (10). The cavities are all equipped with a one-way valve device. The surface of the catheter (10) is sleeved with a threaded cylinder (11). The outer surface of the threaded cylinder (11) is slidably connected to a sliding sleeve (13). The outer surface of the threaded cylinder (11) is threadedly connected to a threaded disk (21). The threaded disk (21) is located at the top of the sliding sleeve (13). The bottom of the surface of the threaded cylinder (11) is fixedly connected to a fixed sleeve (14). The surface of the fixed sleeve (14) is rotatably connected to three sliding rotating rods (15). The surface of the sliding sleeve (13) is rotatably connected to three rotating rods (16). The sliding rotating rods (15) and the rotating rods (16) are rotatably connected. One end of the rotating rod (16) away from the sliding sleeve (13) is rotatably connected to a pressing block (17). One end of the sliding rotating rod (15) away from the fixed sleeve (14) is fixedly connected to a sliding rod (18). The sliding rod (18) slides in the inner cavity of the pressing block (17).

2. A quantitative titrator according to claim 1, characterized in that: A rotating cap (7) is fixedly connected to the right side of the locking column (6), and a plurality of protruding patterns are provided on the surface of the rotating cap (7).

3. A quantitative titrator according to claim 2, characterized in that: An elastic tube (12) is bonded to the inner cavity of the threaded tube (11), and the catheter (10) slides in the inner cavity of the elastic tube (12).

4. A quantitative titrator according to claim 3, characterized in that: The surface of the sliding rod (18) is penetrated by a sliding groove (19) for the sliding rod (18) to slide.

5. A quantitative titrator according to claim 4, characterized in that: The opposite side of the pressing block (17) is bonded with a sponge pad (20).

6. A quantitative titrator according to claim 5, characterized in that: A plurality of through holes (22) are provided on the surface of the bottom of the conduit (10).

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