Device for chemical test titration

Abstract

The utility model discloses a device for chemical test titration. The device comprises a bottom table and a stand column assembly, the bottom table is of a hollow box-shaped structure, the bottom table comprises an upper panel, the upper surface of the upper panel is provided with a plurality of placing structures used for placing vessels, and the plurality of placing structures are integrally distributed in a circumferential shape; the stand column assembly comprises an outer column body, an inner column body, a positioning column and a cantilever, the positioning column is fixed in the bottom table, the outer column body and the inner column body are both of a cylindrical structure, the lower end of the inner column body can freely slide up and down to be arranged on the positioning column in a sleeving mode, and the outer column body can freely slide to be arranged on the inner column body in a sleeving mode. According to the utility model, a plurality of positions for placing utensils such as beakers and the like are arranged on the bottom table, and titration is realized by rotating the position of the dropper, so that multi-group contrast is realized; by arranging all parts of the stand column assembly and matching the parts, the position of the dropper is adjusted through manual rotation during use, the structure is simpler, transmission is rapid, the dropper does not depend on electric power, energy consumption is reduced, and more energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of teaching and experimental equipment technology, and in particular to a device for chemical titration. Background Technology

[0002] In chemical experiments, titration is a chemical experimental procedure and a method of quantitative analysis. It determines the content of a certain solute by quantitatively reacting two solutions. In existing titration experiments, the main experimental equipment required includes a titration stand and acid-base burettes, as well as glassware such as glass rods, beakers, and Erlenmeyer flasks.

[0003] An existing Chinese patent (application number: CN202322837504.6; patent title: A chemical experimental titration device) discloses a titration device for chemistry classrooms. The technical solution of this patent has shortcomings, specifically including:

[0004] 1. There is only one position for placing the beaker, and it cannot be used to conduct multiple sets of comparative experiments.

[0005] 2. The dropper clamping device is driven to rotate by a motor, thereby achieving lifting and adjustment; it relies on a motor and is connected by a motion transmission mechanism, which makes the structure complex, the transmission path long, and inconvenient to use when the power is off. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides an apparatus for chemical titration, the solution of which is as follows:

[0007] An apparatus for chemical titration includes a base and a column assembly. The base is a hollow box-shaped structure, and includes a top panel. The upper surface of the top panel has multiple placement structures for placing glassware, arranged in a circular pattern. The column assembly includes an outer column, an inner column, a positioning column, and a cantilever. The positioning column is fixed inside the base. Both the outer and inner columns are cylindrical structures. The lower end of the inner column is slidably fitted onto the positioning column. The outer cylinder is slidably fitted onto the inner cylinder. The lower end of the outer cylinder is rotatably connected to the upper panel. The outer cylinder has a spiral groove extending along its axial direction. The cantilever passes through the groove and is fixedly connected at one end to the surface of the inner cylinder, while the other end is a free end with a gripper for holding the dropper. A rubber pad is provided on the upper part of the inner wall of the outer cylinder, and the rubber pad abuts against the outer wall of the inner cylinder and is slidably in contact with it.

[0008] In some preferred embodiments, both the cantilever and the gripper are tubular, and their interiors are connected. An annular rubber restraint band is also included, disposed within the cantilever and extending at one end into the gripper for engaging with the gripper to secure the dropper. An adjusting bolt is threaded onto the cantilever, extending into the cantilever, and the other end of the rubber restraint band is fixedly connected to the adjusting bolt.

[0009] In some preferred embodiments, the gripper is provided with a stop pin to prevent the rubber restraint band from entering the cantilever.

[0010] In some preferred embodiments, the placement structure is a pad or a groove.

[0011] In some preferred embodiments, the lower end of the outer column is connected to the upper panel via a bearing to enable rotation.

[0012] In some preferred embodiments, the base platform further includes a base plate opposite to the panel, and the lower end of the positioning post is fixedly connected to the base plate, while the upper end is a free end located between the base plate and the panel.

[0013] In some preferred embodiments, the upper end of the inner column protrudes beyond the upper end of the outer column, and the upper end of the inner column is provided with a column cap, the upper surface of which is arc-shaped.

[0014] Beneficial effects:

[0015] 1. This utility model sets multiple positions for placing beakers and other vessels on the base platform, and achieves titration by rotating the position of the dropper, thereby realizing multiple sets of controls;

[0016] 2. This utility model, by setting up the various components of the column assembly and their cooperation, allows for manual rotation during use to adjust the position of the drip tube. The structure is simpler, the transmission is faster, it does not rely on electricity, reduces energy consumption, and is more energy-efficient. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the cantilever and gripper configuration in one embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the cantilever and gripper in one embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the connection structure between the column assembly and the base in one embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of the connection structure of the rubber constraint band and the adjusting bolt in one embodiment of this utility model. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] refer to Figure 1-5 As shown, an apparatus for chemical titration includes a base 100 and a column assembly 200. The base 100 is a hollow box-shaped structure and includes a top panel 110. The upper surface of the top panel 110 is provided with multiple placement structures 101 for placing containers, arranged in a circular pattern. The column assembly 200 includes an outer column 210, an inner column 220, a positioning column 230, and a cantilever 240. The positioning column 230 is fixed inside the base 100. Both the outer column 210 and the inner column 220 are cylindrical structures. The lower end of the inner column 220 is slidably fitted onto the positioning column 230, and the outer column 210 is slidably fitted onto the inner column 220. The lower end of the outer column 210 is rotatably connected to the top panel 110. 0. The outer column 210 is provided with a spiral-shaped slot 211, and the slot 211 extends along the axial direction of the outer column 210. The cantilever 240 passes through the slot 211, and one end is fixedly connected to the surface of the inner column 220. The other end is provided with a gripper 250 for holding the dropper as a free end. A rubber pad 260 is provided on the upper part of the inner wall of the outer column 210. The rubber pad 260 abuts against the outer wall of the inner column 220 and can slide in contact.

[0024] Using the above technical solution, the base 100 supports the column assembly 200. The function of the placement structure 101 is to place beakers and other items to be used for titration during the experiment. Multiple placement structures 101 are provided on the upper panel 110 to allow for the simultaneous placement of multiple containers for control experiments. The multiple placement structures 101 are arranged in a circular pattern, allowing for viewing the titration from various angles during use; simultaneously, the multiple placement positions also provide backup containers for titration. The gripper 250 at the end of the cantilever 240 is used to hold the dropper. In use, the dropper is suspended by the gripper 250 for subsequent titration. The outer column 210 is rotatably connected to the upper panel 110. Due to the threaded slot 211 on the outer column 210 and the cantilever 240 passing through this slot 211, rotating the outer column 210 causes the cantilever 240 to rise or fall along with the slot 211, thereby raising or lowering the height of the gripper 250. The positioning post 230 is used to position the inner column 220, preventing lateral swaying and instability. The inner column 220 and the positioning post 230 are slidably engaged to ensure that the inner column 220 experiences resistance during movement. During the rising or falling of the inner column 220, the elastic compression of the rubber pad 260 allows it to be fixed in a specific position, preventing it from sliding down due to its own weight. Because the outer surface of the rubber pad 260 is slidably in contact with the inner column 220, under external force, the inner column 220 can eliminate the elastic effect of the rubber pad 260 and rise or fall. In practical implementation, the outer surface of the inner column 220 can be polished to improve smoothness and achieve sliding contact with other components. Simultaneously, the rubber pad 260 can be supported by fluorinated rubber, providing elasticity while maintaining sufficient surface hardness to ensure sliding contact with the inner column 220. In this design, the height of the dropper is adjusted by rotating the outer column 210 by hand, which, through structural coordination, raises or lowers the inner column 220, further adjusting the dropper's height. Compared to a motor outputting speed via a transmission structure, this design is simpler, faster, does not rely on electricity, reduces energy consumption, and is more energy-efficient.

[0025] In some preferred embodiments, both the cantilever 240 and the gripper 250 are tubular, and their interiors are connected. An annular rubber restraint band 270 is also included, disposed within the cantilever 240 with one end extending into the gripper 250 for engaging with the gripper 250 to secure the dropper. An adjusting bolt 280 is threaded onto the cantilever 240, extending into the cantilever 240, and the other end of the rubber restraint band 270 is fixedly connected to the adjusting bolt 280. Both the cantilever 240 and the gripper 250 are tubular to accommodate the rubber restraint band 270. In practical use, one end of the rubber restraint band 270 is fixed to the adjusting bolt 280. When the adjusting bolt 280 rotates, the rubber restraint band 270 can be pulled to secure the dropper placed within the gripper 250 and the rubber restraint band 270, preventing it from falling out. When the adjusting bolt 280 is turned in the opposite direction, the rubber restraint band 270 can be loosened to release the dropper.

[0026] In some preferred embodiments, the gripper 250 is provided with a stop pin 251 to prevent the rubber restraint band 270 from entering the cantilever 240. The rubber restraint band 270 is annular. Under normal conditions, the stop pin 251 passes through the annular rubber restraint band 270 and is fixed to the gripper 250. When the dropper is not inserted into the rubber restraint band 270, the rubber restraint band 270 is tightened by adjusting the bolt 280, and the rubber restraint band 270 is blocked by the stop pin 251, preventing it from retracting into the cantilever 240.

[0027] In some preferred embodiments, the placement structure 101 is a pad or a groove. The pad protrudes from the upper panel 110, and the groove is formed by recessing the upper surface of the upper panel 110.

[0028] In some preferred embodiments, the lower end of the outer column 210 is connected to the upper panel 110 via a bearing to enable rotation. The outer wall of the bearing outer ring is fixedly embedded in the upper panel 110. The outer wall of the outer column 210 is fixedly connected to the inner wall of the bearing inner ring.

[0029] In some preferred embodiments, the base 100 further includes a base plate 120 opposite to the panel 110, and the lower end of the positioning post 230 is fixedly connected to the base plate 120, while the upper end is a free end located between the base plate 120 and the panel 110. The panel 110 and the base plate 120 form a box-shaped structure of the base 100.

[0030] In some preferred embodiments, the upper end of the inner column 220 protrudes above the upper end of the outer column 210, and a column cap 223 is provided at the upper end of the inner column 220, the upper surface of which is arc-shaped. In actual use, the inner column 220 can be lowered or raised by pressing or pulling the column cap 223.

[0031] In some preferred embodiments, the inner column 220 is divided into an upper section 221 and a lower section 222, and the outer diameter of the upper section 221 is smaller than the outer diameter of the lower section 222, so that a space for accommodating the rubber pad 260 is formed between the upper section 221 and the inner wall of the outer column 210, while the lower section 222 is in close contact with the inner wall of the outer column 210.

[0032] In some preferred embodiments, the rubber pad 260 is annular, and the end surface of the rubber pad 260 that contacts the inner column 220 is arc-shaped.

[0033] In some preferred embodiments, the rubber pad 260 consists of a plurality of rubber blocks distributed in a circular pattern along the inner wall of the outer column 210.

[0034] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A device for the titration of chemical tests, characterized in that, The base table (100) is a hollow box structure, and the base table (100) comprises an upper panel (110), and a top surface of the upper panel (110) is provided with a plurality of placement structures (101) for placing vessels, and the plurality of placement structures (101) are arranged in a circumferential shape as a whole. The column assembly (200) comprises an outer column body (210), an inner column body (220), a positioning column (230) and a cantilever (240), the positioning column (230) is fixed to the inside of the base table (100), the outer column body (210) and the inner column body (220) are both cylindrical structures, the lower end of the inner column body (220) is freely slidably sleeved on the positioning column (230), the outer column body (210) is freely slidably sleeved on the inner column body (220), the lower end of the outer column body (210) is circumferentially freely rotatably connected to the upper panel (110), the outer column body (210) is provided with a spiral strip-shaped slot hole (211), and the strip-shaped slot hole (211) extends along the axial direction of the outer column body (210), the cantilever (240) passes through the strip-shaped slot hole (211), and one end is fixedly connected to the surface of the inner column body (220), and the other end is provided with a clamping jaw (250) for clamping a dropper as a free end, and the upper part of the inner wall of the outer column body (210) is provided with a rubber pad (260), the rubber pad (260) abuts against the outer wall of the inner column body (220) and is slidably contacted. The cantilever (240) and the clamping jaw (250) are both tubular, and the interiors of the cantilever (240) and the clamping jaw (250) are connected; 2. The device for titration of chemical tests according to claim 1, characterized in that: Further comprising a ring-shaped rubber restraint band (270), the rubber restraint band (270) is arranged in the cantilever (240) and extends into the clamping jaw (250) at one end, so as to cooperate with the clamping jaw (250) to fix the dropper, and an adjusting bolt (280) is threadedly connected to the cantilever (240), the adjusting bolt (280) extends into the interior of the cantilever (240), and the other end of the rubber restraint band (270) is fixedly connected to the adjusting bolt (280). The clamping jaw (250) is provided with a stop pin (251) for blocking the rubber restraint band (270) from entering the cantilever (240).

3. The device for titration of chemical tests according to claim 2, characterized in that: The placement structure (101) is a pad plate or a groove.

4. The device for titration of chemical tests according to claim 1, characterized in that: The lower end of the outer column body (210) is connected to the upper panel (110) through a bearing to realize rotation.

5. The device for titration of chemical tests according to claim 1, characterized in that: The base table (100) further comprises a bottom plate (120) opposite to the panel (110), and the lower end of the positioning column (230) is fixedly connected to the bottom plate (120), and the upper end is a free end and is located between the bottom plate (120) and the panel (110).

6. The device for titration of chemical tests according to claim 1, characterized in that: The upper end of the inner column body (220) protrudes from the upper end of the outer column body (210), and the upper end of the inner column body (220) is provided with a column cap (223), and the upper surface of the column cap (223) is arc-shaped.

7. The device for titration of chemical tests according to claim 1, characterized in that: The base table (100) is a hollow box structure, and the base table (100) comprises an upper panel (110), and a top surface of the upper panel (110) is provided with a plurality of placement structures (101) for placing vessels, and the plurality of placement structures (101) are arranged in a circumferential shape as a whole.

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