Titration device capable of being accurately controlled

Abstract

The utility model provides a titration device capable of being accurately controlled, which relates to the technical field of analysis and inspection and comprises a base, a bottom column, an upper column, a titration component and a micro peristaltic pump. According to the titration device capable of being accurately controlled, a titrated container is placed on the tray of the weighing instrument, and the weight change of the container and a solution in the container can be monitored in real time through the weighing instrument. Then, the flow of the titrating solution is set by adjusting the operation parameters of the micro peristaltic pump; at the moment, the micro peristaltic pump is started, the pump wheel rotates to drive the hose wound on the pump wheel to work, and the titrating solution in the burette is dripped into the reaction container at the set flow through the hose and the dripper. In the titration process, the weighing instrument monitors the weight change in real time, and an experimenter can adjust the flow and other parameters of the micro peristaltic pump at any time according to experimental data and titration conditions until the titration operation is completed. In the whole process, the flow of the titrating solution is directly controlled without depending on manual work, so that the error is greatly reduced, and the experiment accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of analytical testing technology, and in particular to a titration device that can be precisely controlled. Background Technology

[0002] A titration apparatus is a device used in analytical chemistry experiments, primarily for determining the concentration of a substance in an unknown solution by gradually adding a solution of known concentration. The purpose of titration is to estimate the concentration of reactants by accurately measuring the volume of the titrant; therefore, the volume control of the titrant must be extremely precise. Titration apparatuses allow for fine adjustments to the added volume, typically within milliliters or even microliters. The accuracy of the titration directly affects the accuracy of the experimental results.

[0003] Traditional titration methods rely on manual control of the titration flow rate, which has a large margin of error. Precise control of the titration flow rate and reaction process helps to reduce the impact of human error and improper operation. Utility Model Content

[0004] This invention provides a precisely controllable titration device, solving the problem mentioned in the background art of large errors caused by relying on manual control of the titration flow rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precisely controllable titration device, comprising a base, a bottom column, an upper column, a titration assembly, and a micro-peristaltic pump. The bottom column is disposed on the upper surface of the base, and the upper column is rotatably connected to the upper end of the bottom column. The titration assembly is disposed on the upper column and includes a clamping member, a burette, and a flexible tube. The clamping member is slidably connected to the upper column and clamps and fixes the burette. The lower end of the burette is fixedly connected to a flexible tube. A micro-peristaltic pump is fixedly connected to the side of the upper column, and a pump wheel is disposed on the side of the micro-peristaltic pump. The flexible tube is coiled around the pump wheel.

[0006] Preferably, the base is composed of two weighing instruments joined side by side, with a tray provided at the center of the upper surface of each weighing instrument, and the base column located between the two weighing instruments.

[0007] Preferably, the upper column has a sliding groove on its side, the clamping member includes a slide block and a clamping rod, a threaded rod is fixedly connected to the slide block and inserted into the sliding groove, and two clamping rods are fixedly connected to one end of the slide block and are arranged vertically.

[0008] Preferably, the free end of the clamping rod is fixedly connected to a clamping ring, and an opening is provided on the outer peripheral side of the clamping ring, and the burette is inserted into the two clamping rings.

[0009] Preferably, the outer diameter of the burette is larger than the inner diameter of the clamping ring, and the free end of the hose is fixedly connected with a drop head.

[0010] Preferably, the upper surface of the bottom column is provided with a rotating hole, the inner side surface of the rotating hole is horizontally provided with a ring groove, the lower end of the upper column is fixedly connected with a connecting column, the outer circumferential surface of the connecting column is fixedly connected with a circular ring, the connecting column is inserted into the rotating hole, the circular ring is slidingly connected in the ring groove, and the upper column is rotatably connected with the bottom column through the circular ring.

[0011] Preferably, one side of the circular ring is provided with a limiting ring, the limiting ring is fixed on the connecting column, the limiting ring is located above the bottom column, the outer circumferential surface of the limiting ring is vertically provided with two insertion grooves, the two insertion grooves are symmetrically arranged, the opening surface of the insertion groove is located on the same side as the opening surface of the sliding groove, and the sliding groove and the micro peristaltic pump are located on two mutually perpendicular sides of the upper column.

[0012] Preferably, the clamping rod and the micro peristaltic pump are located on the same side of the upper column.

[0013] Preferably, the side surface of the bottom column is fixedly connected with a side frame, the upper end of the side frame is fixedly connected with a hole seat, and the hole seat is slidingly connected with a sliding column.

[0014] Preferably, one end of the sliding column is fixedly connected with a plug, the plug is inserted into the insertion groove, the other end of the sliding column is fixedly connected with an end head, the outer circumferential surface of the sliding column is sleeved with a spring, the spring is located on the side of the hole seat close to the bottom column, the end of the plug close to the hole seat is provided with a baffle, the baffle is fixed on the sliding column, and the two ends of the spring are fixed on the baffle and the hole seat respectively.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The container to be titrated is placed on the tray of the weighing instrument, and the weight change of the container and the solution therein can be monitored in real time through the weighing instrument. Then, the operating parameters of the micro peristaltic pump are adjusted, and the flow of the titration solution is set. At this time, the micro peristaltic pump is started, the pump wheel rotates, and the hose wound thereon works to add the titration solution in the burette to the reaction container through the hose and the drop head at the set flow. During the titration process, the weighing instrument monitors the weight change in real time, and the experimental personnel can adjust the flow and other parameters of the micro peristaltic pump at any time according to the experimental data and the titration situation until the titration operation is completed. In the whole process, the flow of the titration solution is not directly controlled by manual operation, but the precise instrument equipment is used to realize the precise control of the titration process, greatly reducing the error and improving the reliability and accuracy of the experiment.

[0017] 2. When the titration operation of the container on one side tray is completed, the position of the titration assembly needs to be adjusted, the end head is pulled to pull the plug out of the slot of the limiting ring, at this time the upper column is rotated to drive the titration assembly to rotate above the container on the other side tray for titration operation, the end head is loosened, under the action of the spring, the plug is inserted into the corresponding slot, the position of the upper column is locked, by rotating the titration assembly, the titration target can be quickly switched, without manually replacing the titration assembly or the container, the operation time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of the titration device with accurate control of the utility model;

[0019] Figure 2 Front view of the titration device with accurate control of the utility model;

[0020] Figure 3 Schematic view of the installation position of the side frame of the utility model;

[0021] Figure 4 Sectional view of the bottom column of the utility model;

[0022] Figure 5 Structure diagram of the upper column of the utility model;

[0023] Figure 6 Bottom view of the upper column of the utility model;

[0024] Figure 7 Structure diagram of the cooperation of the bottom column and the upper column of the utility model;

[0025] Figure 8 A enlarged view of Figure 4 B enlarged view of

[0026] Figure 9 B enlarged view of Figure 7

[0027] Reference numerals in the drawing: 1, base; 11, weighing instrument; 12, tray; 2, bottom column; 21, rotating hole; 22, ring groove; 3, upper column; 31, connecting column; 32, circular ring; 33, limiting ring; 331, slot; 34, sliding groove; 4, titration assembly; 41, clamping piece; 411, sliding seat; 4111, threaded rod; 412, clamping rod; 4121, clamping ring; 42, titration tube; 43, hose; 431, drop head; 5, micro peristaltic pump; 51, pump wheel; 6, side frame; 61, hole seat; 7, sliding column; 71, plug; 72, baffle; 73, spring; 74, end head. DETAILED DESCRIPTION

[0028] ​The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0029] The utility model provides a kind of titration device of accurate control, as shown in Figure 1 And Figure 2 It includes base 1, bottom column 2, upper column 3, titration assembly 4 and micro peristaltic pump 5, the upper surface of base 1 is provided with bottom column 2, base 1 is formed by two weighing instruments 11 and is spliced side by side, the upper surface center position of weighing instrument 11 is provided with tray 12, and bottom column 2 is located in the middle of two weighing instruments 11. Base 1 is formed by two weighing instruments 11 and is spliced side by side, and this design can weigh reaction container etc. placed on weighing instrument 11 respectively during titration. The upper surface center position of weighing instrument 11 is provided with tray 12, and tray 12 is used to stably place the container etc. to be titrated, to ensure stability during titration. Base 1 as a whole plays the role of supporting the whole device and providing the basis for subsequent accurate measurement.

[0030] As shown in Figure 3 And Figure 4 Upper column 3 is rotatably connected to the upper end of bottom column 2, and the upper surface of bottom column 2 is provided with a rotating hole 21, and a ring groove 22 is horizontally formed on the inner side surface of rotating hole 21, as shown in Figure 5 The lower end of upper column 3 is fixedly connected with a connecting column 31, and the outer circumferential surface of connecting column 31 is fixedly connected with a circular ring 32, connecting column 31 is inserted into rotating hole 21, and circular ring 32 is slidably connected in ring groove 22, and upper column 3 is rotatably connected with bottom column 2 through circular ring 32. Bottom column 2 is mainly used to support upper column 3, connecting column 31 is inserted into rotating hole 21, and circular ring 32 is slidably connected in ring groove 22, so as to realize the rotatable connection between upper column 3 and bottom column 2 through circular ring 32. The side surface of upper column 3 is provided with a sliding groove 34, which is used to cooperate with the clamping part 41 in titration assembly 4. In addition, the side surface of upper column 3 is also fixedly connected with micro peristaltic pump 5, which provides power support for the delivery of solution during titration.

[0031] As shown in Figure 2 And Figure 3As shown, the titration assembly 4 is arranged on the upper column 3, and the titration assembly 4 comprises a clamping piece 41, a burette 42 and a hose 43. The clamping piece 41 is slidingly connected to the upper column 3, and a sliding groove 34 is arranged on the side surface of the upper column 3. The clamping piece 41 comprises a sliding seat 411 and a clamping rod 412. A threaded rod 4111 is fixedly connected to the sliding seat 411 and is inserted into the sliding groove 34. A fixing nut is threadedly connected to the threaded rod 4111 and is located on the opposite side of the sliding seat 411. The sliding seat 411 can be vertically moved along the sliding groove 34 by pulling the sliding seat 411. After the movement is completed, the fixing nut is tightened to clamp and fix the sliding seat 411 on the upper column 3. This adjustable design enables the device to adapt to the height and position requirements of different containers, increases the versatility of the device, and is suitable for different experimental environments and operation requirements. One end of the sliding seat 411 is fixedly connected to two clamping rods 412 which are vertically arranged. The burette 42 is clamped and fixed on the clamping piece 41. The free end of the clamping rod 412 is fixedly connected to a clamping ring 4121. An opening is arranged on the outer circumferential surface of the clamping ring 4121. The burette 42 is inserted into the two clamping rings 4121. The outer diameter of the burette 42 is larger than the inner diameter of the clamping ring 4121. The lower end of the burette 42 is fixedly connected to the hose 43. The free end of the hose 43 is fixedly connected to a dropping head 431. Due to the interference fit between the burette 42 and the clamping ring 4121, the burette 42 can be stably fixed on the clamping piece 41. The burette 42 is used to store titration liquid. The lower end of the burette 42 is fixedly connected to the hose 43. The free end of the hose 43 is fixedly connected to the dropping head 431, which is used to add titration liquid to the reaction container.

[0032] The material of the clamping ring 4121 is plastic. The plastic clamping ring 4121 has a certain flexibility. When the burette 42 is inserted into the clamping ring 4121, the inner diameter of the clamping ring 4121 will expand and the opening size will decrease, so that the burette 42 can be tightly wrapped. This design not only ensures the stability of the burette 42, but also avoids damage to the burette 42 caused by hard clamping.

[0033] As shown in Figure 2 The side surface of the upper column 3 is fixedly connected to a micro peristaltic pump 5. The side surface of the micro peristaltic pump 5 is provided with a pump wheel 51. The hose 43 is wound on the pump wheel 51. The clamping rod 412 and the micro peristaltic pump 5 are located on the same side of the upper column 3. The micro peristaltic pump 5 is used to accurately control the flow of titration liquid in the hose 43. Compared with manual control, the micro peristaltic pump 5 can realize more accurate flow adjustment, effectively reduce titration error and improve the accuracy of experimental results.

[0034] As shown in Figure 2 and Figure 6As shown, one side of the circular ring 32 is provided with a limiting ring 33, the limiting ring 33 is fixed on the connecting column 31, the limiting ring 33 is located above the bottom column 2, two insertion slots 331 are vertically arranged on the outer circumferential side of the limiting ring 33, and the two insertion slots 331 are symmetrically arranged. The limiting ring 33 is mainly used for cooperating with related components on the side surface of the bottom column 2, limiting the upper column 3 after rotation, ensuring that the upper column 3 does not rotate randomly during titration, and ensuring the stability of the titration operation. The opening surface of the insertion slot 331 and the opening surface of the sliding groove 34 are located on the same side, and the sliding groove 34 and the micro peristaltic pump 5 are respectively located on two mutually perpendicular side surfaces of the upper column 3.

[0035] As shown in Figure 7 and Figure 8 The side surface of the bottom column 2 is fixedly connected with a side frame 6, the upper end of the side frame 6 is fixedly connected with a hole seat 61, and a sliding column 7 is slidably connected in the hole seat 61. Figure 9 As shown in The one end of the sliding column 7 is fixedly connected with a plug 71, the plug 71 is inserted into the insertion slot 331, the other end of the sliding column 7 is fixedly connected with an end head 74, a spring 73 is sleeved on the outer circumferential side of the sliding column 7, the spring 73 is located on the side of the hole seat 61 close to the bottom column 2, the end of the plug 71 close to the hole seat 61 is provided with a baffle 72, the baffle 72 is fixed on the sliding column 7, and the two ends of the spring 73 are fixed on the baffle 72 and the hole seat 61 respectively. When it is necessary to rotate the upper column 3 to adjust the position of the titration assembly 4, the plug 71 can be pulled out of the insertion slot 331 by pulling the end head 74, and at this time the upper column 3 can be rotated relative to the bottom column 2. After being rotated to a suitable position, the end head 74 is loosened, and under the action of the spring 73, the plug 71 is inserted into the corresponding insertion slot 331 again, so that the position of the upper column 3 is locked.

[0036] The utility model adopts, like Figure 1 and Figure 2As shown, in the use of the device, first, the container to be titrated is placed on the tray 12 of the weighing instrument 11, and the weight change of the container and the solution therein can be monitored in real time by the weighing instrument 11. Then, by adjusting the operating parameters of the micro peristaltic pump 5, the flow rate of the titration solution is set. At this time, the micro peristaltic pump 5 is started, the pump wheel 51 rotates, driving the hose 43 coiled thereon to work, and the titration solution in the burette 42 is added to the reaction container through the hose 43 and the dripper 431 at a set flow rate. During the titration process, the weighing instrument 11 monitors the weight change in real time, and the experimental personnel can adjust the flow rate and other parameters of the micro peristaltic pump 5 at any time according to the experimental data and the titration situation, until the titration operation is completed. During the whole process, the flow rate of the titration solution is not directly controlled by manual operation, but the precise instrument equipment is used to realize the precise control of the titration process, greatly reducing the error and improving the reliability and accuracy of the experiment. Then, when the titration operation of the container on one side of the tray 12 is completed, the position of the titration assembly 4 needs to be adjusted, the end head 74 is pulled out, the plug 71 is pulled out of the insertion slot 331 of the limiting ring 33, at this time the upper column 3 is rotated, driving the titration assembly 4 to rotate above the container on the other side of the tray 12 for titration operation, the end head 74 is loosened, and under the action of the spring 73, the plug 71 is inserted into the corresponding insertion slot 331, the position of the upper column 3 is locked, and by rotating the titration assembly 4, the titration target can be quickly switched, without manually changing the titration assembly 4 or the container, saving the operation time.

[0037] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A precisely controllable titration device, characterized in that, The utility model provides a titration device, including base (1), bottom column (2), upper column (3), titration subassembly (4) and micro -peristaltic pump (5), the upper surface of base (1) is provided bottom column (2), upper column (3) is rotatably connected in the upper end of bottom column (2), titration subassembly (4) is provided on upper column (3), titration subassembly (4) includes clamping piece (41), burette (42) and hose (43), clamping piece (41) is slidably connected on upper column (3), clamping piece (41) is clamped and fixed burette (42) on, the lower end of burette (42) is fixedly connected with hose (43), the lateral surface of upper column (3) is fixedly connected with micro -peristaltic pump (5), the lateral surface of micro -peristaltic pump (5) is provided with pump wheel (51), and the pump wheel (51) is coiled on the hose (43).

2. The precisely controllable titration device according to claim 1, characterized in that The base (1) is spliced side by side by two weighing instruments (11), the upper surface of the weighing instrument (11) is provided with a tray (12) at the center position, and the bottom column (2) is located between the two weighing instruments (11).

3. The precisely controllable titration device of claim 1, wherein, The upper column (3) is provided with a sliding groove (34) on the side surface, the clamping piece (41) includes a sliding seat (411) and a clamping rod (412), the threaded rod (4111) is inserted into the sliding groove (34), and the sliding seat (411) is fixedly connected with two clamping rods (412) at one end.

4. The precisely controllable titration device according to claim 3, characterized in that The free end of the clamping rod (412) is fixedly connected with a clamping ring (4121), an opening is formed on the outer circumferential side surface of the clamping ring (4121), and the burette (42) is inserted into the two clamping rings (4121).

5. The precisely controllable titration device according to claim 4, characterized in that The outer diameter of the burette (42) is greater than the inner diameter of the clamping ring (4121), and the free end of the hose (43) is fixedly connected with a drop head (431).

6. The precisely controllable titration device of claim 3, wherein, The upper surface of the bottom column (2) is provided with a rotating hole (21), a ring groove (22) is horizontally formed on the inner side surface of the rotating hole (21), the lower end of the upper column (3) is fixedly connected with a connecting column (31), the outer circumferential side surface of the connecting column (31) is fixedly connected with a circular ring (32), the connecting column (31) is inserted into the rotating hole (21), the circular ring (32) is slidably connected in the ring groove (22), and the upper column (3) is rotatably connected with the bottom column (2) through the circular ring (32).

7. The precisely controllable titration device according to claim 6, characterized in that One side of the circular ring (32) is provided with a limiting ring (33), the limiting ring (33) is fixed on the connecting column (31), the limiting ring (33) is located above the bottom column (2), two insertion grooves (331) are vertically formed on the outer circumferential side surface of the limiting ring (33), the insertion grooves (331) are symmetrically arranged, the opening surface of the insertion groove (331) is located on the same side as the opening surface of the sliding groove (34), and the sliding groove (34) and the micro -peristaltic pump (5) are located on two mutually perpendicular side surfaces of the upper column (3) respectively.

8. The precisely controllable titration device according to claim 7, characterized in that The clamping rod (412) is located on the same side of the upper column (3) as the micro-creep pump (5).

9. The precisely controllable titration device according to claim 7, characterized in that The side of the bottom column (2) is fixedly connected with a side frame (6), the upper end of the side frame (6) is fixedly connected with a hole seat (61), and the hole seat (61) is slidably connected with a sliding column (7).

10. The precisely controllable titration device according to claim 9, characterized in that One end of the sliding column (7) is fixedly connected with a plug (71), the plug (71) is inserted into the insertion groove (331), the other end of the sliding column (7) is fixedly connected with an end head (74), the outer circumferential side of the sliding column (7) is sleeved with a spring (73), the spring (73) is located on the side of the hole seat (61) close to the bottom column (2), one end of the plug (71) close to the hole seat (61) is provided with a baffle (72), the baffle (72) is fixed on the sliding column (7), and the two ends of the spring (73) are fixed on the baffle (72) and the hole seat (61) respectively.

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