A fully automatic potentiometric titrator

Abstract

The application relates to the technical field of chemical analysis instruments, in particular to a full-automatic potentiometric titrator which comprises a body, a base, a limiting groove, a positioning line, an electrode positioning block and an automatic adjusting assembly, the body is connected with the base, a limiting groove is arranged at the top of the base, a positioning line is arranged at the bottom of the inner wall of the limiting groove, and the electrode positioning block is arranged above the limiting groove. The application can adjust the height of the electrode positioning block by arranging a servo motor, a mounting column and a tower barrel and the like, and by screw thread connection between a screw rod and a sleeve, when the servo motor drives the screw rod to rotate, the sleeve will be synchronously lifted in the mounting column, so that the height of the electrode positioning block is adjusted, thereby solving the problems of low automation degree, the need of adjusting the height and position of the electrode by workers, and poor accuracy and repeatability of measurement results.

Description

Technical Field

[0001] This application relates to the technical field of chemical analysis instruments, and in particular to a fully automated potentiometric titrator. Background Technology

[0002] A potentiometric titrator is a commonly used instrument for volumetric analysis in chemical analysis using potentiometric titration. It determines the titration endpoint by measuring changes in electrode potential, thereby achieving accurate determination of the content of the analyte in a sample. However, traditional potentiometric titrators have several shortcomings. Firstly, their automation level is low; during titration, operators need to manually add titrant and record data, which is not only cumbersome but also prone to introducing errors due to human intervention, resulting in poor accuracy and repeatability of the measurement results. Secondly, the instrument's functions are relatively limited, lacking real-time monitoring and intelligent control of the titration process, making it difficult to meet the needs of complex samples and high-precision analysis. Utility Model Content

[0003] To address the problems mentioned in the background section, this application provides a fully automated potentiometric titrator.

[0004] This application provides a fully automatic potentiometric titrator, which adopts the following technical solution: Optionally, a fully automatic potentiometric titrator includes a body, a base, a limiting groove, a positioning line, an electrode positioning block, and an automatic adjustment component. The body is connected to the base, the top of the base has a limiting groove, the bottom of the inner wall of the limiting groove is provided with a positioning line, and the electrode positioning block is disposed above the limiting groove. The automatic adjustment component includes a mounting post, a servo motor, a threaded rod, and a sleeve; The mounting post is connected to the base, the mounting post is connected to the servo motor, the servo motor is connected to the threaded rod, the threaded rod is connected to the mounting post, the threaded rod is threadedly connected to the sleeve, and the sleeve is connected to the mounting post.

[0005] The above scheme, through the cooperation of the mounting column and the servo motor, causes the sleeve to move inside the mounting column when the servo motor drives the threaded rod to rotate, and adjusts the position of the click positioning block. This allows for adjustment of the electrode height, while the limiting groove and positioning line facilitate the placement of the test tube.

[0006] Optionally, it may also include a limiting assembly, which includes a fixed cylinder and a plug rod; The fixed cylinder is connected to the sleeve, the fixed cylinder is sleeved on the insertion rod, and the insertion rod is connected to the electrode positioning block.

[0007] The above scheme uses the cooperation of the fixed cylinder and the insertion rod to adjust the front and rear positions of the electrode positioning block, and bolts are installed between the insertion rod and the fixed cylinder to fix the position of the insertion rod.

[0008] Optionally, it also includes a sample tube positioning assembly, which includes a placement frame, a placement groove, a rubber sleeve, and a protective pad; The placement frame is connected to the base, and a placement groove is provided on the top of the placement frame. The placement groove is connected to a rubber sleeve, which is positioned above the protective pad. The protective pad is connected to the placement groove.

[0009] The above method uses a placement slot to place the sample tube, and the protective pad protects the bottom of the sample tube. At the same time, the rubber sleeve will wrap the test tube during placement, so that the test tube is placed stably in the placement slot.

[0010] Optionally, the sample tube positioning assembly further includes a keyway and a locking block; The keyway is located at the top of the placement frame, the keyway is connected to the card block, and the card block is connected to the rubber sleeve.

[0011] The above method uses keyways and locking blocks to install the rubber sleeve inside the placement slot, ensuring the stability of the rubber sleeve inside the placement slot.

[0012] Optionally, the outer wall of the placement frame is provided with a fixing component, which includes a limiting plate and a support plate; The limiting plate is connected to the placement frame, the limiting plate is connected to the support plate, and the support plate is connected to the base.

[0013] The above solution uses a limiting plate and a support plate to install the placement frame on the outer wall of the base, which makes it convenient to place the sample tube.

[0014] Optionally, the fixing component further includes a locking pin; The locking pin is connected to the limiting plate, and the locking pin is connected to the support plate.

[0015] The above method uses a locking pin inside the tray to connect the limiting plate and the tray together, avoiding unstable connection between the two and affecting the placement of the test tubes.

[0016] In summary, this application includes the following beneficial technical effects: 1. This utility model, by setting up components such as a servo motor, mounting column, and tower, and through the threaded connection between the threaded rod and the sleeve, causes the sleeve to rise and fall synchronously inside the mounting column when the servo motor drives the threaded rod to rotate, thereby adjusting the height of the electrode positioning block. This solves the problem of reduced automation, the need for operators to adjust the height and position of the electrodes, and the resulting poor accuracy and repeatability of measurement results.

[0017] 2. This utility model, by setting up components such as a placement groove, a rubber sleeve, and a protective pad, and through the cooperation between the protective pad and the rubber sleeve, makes the sample tube placed in the placement groove more stable, avoiding shaking in the placement groove and thus preventing damage. This solves the problem that existing sample tube placement racks are prone to shaking when placing sample tubes, resulting in the spillage of test liquid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the automatic adjustment component in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the fixed component in an embodiment of this application; Figure 4 This is a schematic diagram of the test tube positioning component in an embodiment of this application.

[0019] Reference numerals in the attached drawings: 1. Body; 2. Base; 3. Limiting groove; 4. Positioning line; 5. Electrode positioning block; 6. Automatic adjustment component; 601. Mounting column; 602. Servo motor; 603. Threaded rod; 604. Sleeve; 7. Limiting component; 701. Fixing cylinder; 702. Insert rod; 8. Sample tube positioning component; 801. Placement frame; 802. Placement groove; 803. Rubber sleeve; 804. Keyway; 805. Locking block; 806. Protective pad; 9. Fixing component; 901. Limiting plate; 902. Support plate; 903. Locking pin. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0021] This application discloses a fully automated potentiometric titrator. For example... Figure 1As shown, it mainly consists of a body 1, a base 2, a limiting groove 3, a positioning line 4, an electrode positioning block 5, and an automatic adjustment component 6. The body 1, as the core control and operation unit of the fully automatic potentiometric titrator, integrates key components such as the control system and display system. It is used to realize the functions of automated control, data processing, and result display of potentiometric titration. The body 1 is fixedly installed on top of the base 2, and the two can be connected by bolts, welding, etc., to ensure that the body 1 is stably set on the base 2, providing stable support for the normal operation of the titrator. The base 2, as the basic support component of the entire titrator, has a limiting groove 3 on its top. The limiting groove 3 is a regular rectangle or... The circular groove structure, whose size is designed according to the size of the electrode and related components to be placed, is used to limit the electrode positioning block 5 and the electrode, ensuring that the electrode is in an accurate position during titration. The bottom of the inner wall of the limiting groove 3 is provided with a positioning line 4, which can be in the form of scale lines, marking points, etc. Its function is to provide a precise positioning reference for the installation of the electrode positioning block 5 and the electrode, so that the operator can quickly and accurately install the electrode in the appropriate position. The electrode positioning block 5 is set directly above the limiting groove 3, and its shape is adapted to the limiting groove 3 so that it can be embedded in the limiting groove 3 to fix and position the electrode, ensuring that the electrode remains stable during titration and does not shake or shift.

[0022] Please see Figure 2 The automatic adjustment component 6 is a key component for realizing the automatic electrode adjustment function of the titrator. It includes a mounting post 601, a servo motor 602, a threaded rod 603, and a sleeve 604. The mounting post 601 is vertically fixed to one side of the base 2. It can be fixed to the base 2 by welding, bolting, or other methods to ensure the stability of the mounting post 601. The mounting post 601 is used to support and fix the servo motor 602, which is mounted on the top of the mounting post 601 by screws or other connecting parts. The output shaft of the servo motor 602 is fixedly connected to one end of the threaded rod 603. The two can be connected by a key or coupling to ensure that the servo motor 602 can stably transmit power to the threaded rod 603, driving the threaded rod 603 to rotate. The other end of the threaded rod 603 is connected to the mounting post 601 through bearings or other rotating parts, allowing the threaded rod 603 to rotate freely on the mounting post 601. The sleeve 604 is fitted onto the outside of the threaded rod 603, and its inner wall is provided with an internal thread that matches the threaded rod 603. The two are connected by a threaded connection. At the same time, the outer wall of the sleeve 604 is connected to the mounting post 601 through a guide structure. For example, a guide groove is provided on the mounting post 601, and a guide block is provided on the outer wall of the sleeve 604. The guide block is embedded in the guide groove to restrict the rotational movement of the sleeve 604, so that it can only move linearly along the axial direction of the threaded rod 603.

[0023] Please see Figure 3The sample tube positioning assembly 8 consists of a placement frame 801, a placement groove 802, a rubber sleeve 803, and a protective pad 806. It aims to provide a stable and safe placement environment for the sample tubes, ensuring the smooth conduct of titration experiments. The placement frame 801, as the basic support component of the sample tube positioning assembly 8, is made of high-strength metal or engineering plastic. Its shape can be rectangular, square, or other shapes adapted to the layout of the titrator base. A placement groove 802 is provided on the top of the placement frame 801. The number, shape, and size of the placement grooves 802 are designed according to commonly used sample tube specifications and can be circular, elliptical, or polygonal. The depth of the placement groove 802 is sufficient to accommodate most of the sample tube's length for effective positioning. The rubber sleeve 803 is tightly fitted onto the inner wall of the placement groove 802. It is made of rubber material with good elasticity and wear resistance. The connection between the rubber sleeve 803 and the placement groove 802 can be an interference fit, where the outer diameter of the rubber sleeve 803 is slightly larger than the inner diameter of the placement groove 802. The rubber sleeve is compressed to ensure proper positioning. The sleeve 803 is firmly embedded in the placement groove 802. The protective pad 806 is laid at the bottom of the placement groove 802. Its material is soft and has cushioning properties, such as silicone or sponge. The protective pad 806 is fixedly connected to the bottom of the placement groove 802 by adhesive to ensure that the protective pad 806 will not shift during use. The sample tube positioning assembly 8 also includes a keyway 804 and a locking block 805, which are designed to enhance the connection stability between the rubber sleeve 803 and the placement frame 801 and ensure the reliability of sample tube positioning during titration experiments. The keyway 804 is a long strip-shaped groove structure, which is set at the top of the placement frame 801 near the edge of the placement groove 802. The locking block 805 is a block structure, one end of which is fixedly connected to the outer wall of the rubber sleeve 803. The connection method can be integral molding, high-strength adhesive bonding, or embedded fixing. If integral molding is used, the locking block 805 and the rubber sleeve 803 are processed as a whole when manufacturing the rubber sleeve 803 to ensure that the two have good structural strength and stability.

[0024] Please see Figure 2The limiting component 7 consists of a fixed cylinder 701 and an insertion rod 702, designed to improve the stability and positioning accuracy of the electrode positioning block 5 and the electrode during automatic adjustment, ensuring the accuracy of the titration experiment. The fixed cylinder 701 is a hollow cylindrical structure, made of high-strength and corrosion-resistant metal or engineering plastic to adapt to the working environment of the titrator. One end of the fixed cylinder 701 is fixedly connected to the outer wall of the sleeve 604 by welding, threaded connection, or high-strength bonding. The connection position is carefully designed to ensure that the axis of the fixed cylinder 701 is consistent with the movement direction of the sleeve 604. The inner wall of the fixed cylinder 701 is smooth, and its inner diameter is slightly larger than the outer diameter of the insertion rod 702, forming a clearance fit between the two to ensure the insertion rod... The rod 702 can slide smoothly within the fixed cylinder 701 while also providing a certain limiting function to prevent excessive horizontal displacement. The rod 702 is a solid rod-shaped structure, with one end fixedly connected to the electrode positioning block 5. The connection method can be embedded fixing, that is, a hole adapted to the rod 702 is opened on the electrode positioning block 5, and the rod 702 is inserted and fixed by means of pins, glue or interference fit, etc., to ensure that the connection between the rod 702 and the electrode positioning block 5 is firm and will not loosen during titration. The other end of the rod 702 is inserted into the fixed cylinder 701, and the length of the rod 702 inserted into the fixed cylinder 701 is sufficient to meet the stroke requirements of the electrode positioning block 5 during operation.

[0025] Please see Figure 4 The fixing component 9 consists of a limiting plate 901, a support plate 902, and a locking pin 903. It is designed to further enhance the connection stability between the sample tube positioning component 8 and the base 2, improve the overall stability of the titrator structure, and ensure the reliable operation of each component during the experiment. The limiting plate 901 is a plate-shaped structure, and its material is selected from high-strength metal or engineering plastic with good rigidity to ensure sufficient strength and rigidity. The support plate 902 is also a plate-shaped structure with a large area, which can provide a stable support surface for the placement frame 801. One end of the locking pin 903 is designed with an enlarged head. The head shape can be round, square, or other shapes that facilitate force application, and is used to prevent the locking pin 903 from coming off the connection part.

[0026] The implementation principle of a fully automatic potentiometric titrator according to this application embodiment is as follows: During titration, the test tube is placed in the limiting groove 3 at the top of the base 2, and the test tube is accurately positioned by the positioning line 4 inside the limiting groove 3. At the same time, the servo motor 602 is controlled, which drives the threaded rod 603 to rotate, causing the sleeve 604 to move up and down along the axial direction of the threaded rod 603. Since the fixed cylinder 701 is fixedly connected to the sleeve 604, and the insertion rod 702 is fixedly connected to the electrode positioning block 5, and the insertion rod 702 can slide inside the fixed cylinder 701, the movement of the sleeve 604 will drive the insertion rod 702 to move synchronously through the fixed cylinder 701, thereby realizing the automatic lifting and lowering adjustment of the electrode positioning block 5 and the electrode. In this process, the fixed cylinder 701 plays a guiding and limiting role for the insertion rod 702, restricting the movement trajectory of the insertion rod 702, ensuring that the electrode positioning block 5 remains stable during the lifting and lowering process, without shaking or shifting, so that the electrode can be accurately positioned. The rubber sleeve 803 is positioned precisely at the designated location, providing reliable electrode positioning for potentiometric titration experiments. This effectively improves the measurement accuracy and experimental stability of the titrator. Furthermore, when placing multiple sample tubes, the locking block 805 on the outer wall of the rubber sleeve 803 is aligned with the keyway 804. The rubber sleeve 803 is then inserted into the placement groove 802, allowing the locking block 805 to gradually slide into the keyway 804. Once the rubber sleeve 803 is fully installed, the locking block 805 engages within the keyway 804, restricting the horizontal displacement of the rubber sleeve 803 and preventing rotation or displacement during sample tube placement or the experiment. Simultaneously, the cooperation between the locking block 805 and the keyway 804 helps the rubber sleeve 803 better withstand the pressure of the sample tube and external forces during the experiment, further enhancing the overall structural strength and stability of the sample tube positioning assembly 8. This ensures precise positioning of the sample tube in the titration experiment and effectively prevents damage to the sample tube due to loosening of the rubber sleeve 803.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A full-automatic potentiometric titrator, comprising a body (1), a base (2), a limiting groove (3), a positioning line (4), an electrode positioning block (5) and an automatic adjusting assembly (6), characterized in that: The main body (1) is connected to the base (2). A limiting groove (3) is opened on the top of the base (2). A positioning line (4) is provided at the bottom of the inner wall of the limiting groove (3). The electrode positioning block (5) is located above the limiting groove (3). The automatic adjustment component (6) includes a mounting post (601), a servo motor (602), a threaded rod (603), and a sleeve (604). The mounting post (601) is connected to the base (2), the mounting post (601) is connected to the servo motor (602), the servo motor (602) is connected to the threaded rod (603), the threaded rod (603) is connected to the mounting post (601), the threaded rod (603) is threadedly connected to the sleeve (604), and the sleeve (604) is connected to the mounting post (601).

2. The automatic potentiometric titrator according to claim 1, characterized in that: It also includes a limiting component (7), which includes a fixed cylinder (701) and a plug (702); The fixed cylinder (701) is connected to the sleeve (604), the fixed cylinder (701) is sleeved on the insertion rod (702), and the insertion rod (702) is connected to the electrode positioning block (5).

3. The automatic potentiometric titrator according to claim 1, characterized in that: It also includes a sample tube positioning assembly (8), which includes a placement frame (801), a placement groove (802), a rubber sleeve (803), and a protective pad (806). The placement frame (801) is connected to the base (2). The top of the placement frame (801) is provided with a placement groove (802). The placement groove (802) is connected to a rubber sleeve (803). The rubber sleeve (803) is located above the protective pad (806). The protective pad (806) is connected to the placement groove (802).

4. The automatic potentiometric titrator according to claim 3, characterized in that: The sample tube positioning assembly (8) also includes a keyway (804) and a locking block (805); The keyway (804) is located on the top of the placement frame (801), the keyway (804) is connected to the card block (805), and the card block (805) is connected to the rubber sleeve (803).

5. The automatic potentiometric titrator according to claim 4, characterized in that: The outer wall of the placement frame (801) is provided with a fixing component (9), which includes a limiting plate (901) and a support plate (902). The limiting plate (901) is connected to the placement frame (801), the limiting plate (901) is connected to the tray (902), and the tray (902) is connected to the base (2).

6. The automatic potentiometric titrator according to claim 5, characterized in that: The fixing component (9) also includes a locking pin (903); The locking pin (903) is connected to the limiting plate (901), and the locking pin (903) is connected to the support plate (902).

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