An automatic titrator for laboratory use

Abstract

The utility model relates to the field of titration technology, concretely relates to a kind of automatic titrator for laboratory, including the both sides of the bearing frame are equipped with support frame, and the side of two support frames is fixedly connected between the side wall of bearing block, the bottom of two support frames is equipped with placing groove, and the both sides of two support frames are equipped with support rod, and the one end of four support rods is respectively penetrated the side wall of two support frames. Effectively solve the core problem that the titration bottle is not convenient to adjust in vertical direction in prior art, thereby greatly reduce the use flexibility, realize the automatic lifting adjustment of burette assembly in vertical direction, significantly improve the adaptability of equipment to different height reagent tank or liquid level change, avoid the cumbersome operation of traditional manual heightening relying on cushion block, support and other external tools, improve experimental efficiency and automation level.

Description

Technical Field

[0001] This utility model relates to the field of titration technology, and in particular to an automatic titrator for laboratory use. Background Technology

[0002] An automated laboratory titrator is an analytical instrument based on the principle of chemical reaction. It accurately determines the content of a specific component in a solution by automatically controlling the amount and rate of titrant addition. Widely used in quantitative analysis in fields such as chemical engineering, pharmaceuticals, food processing, and environmental monitoring, it is a key piece of equipment in routine laboratory testing. Automated laboratory titrators hold a vital position in the chemical analysis industry. As a core component for achieving high-precision quantitative detection, their mechanical adjustment accuracy, ease of operation, and adaptability to different experimental apparatus have a decisive impact on the accuracy, repeatability, and efficiency of the test results. Particularly in the crucial step of aligning the burette and titration bottle during titration, existing automated titrators have gradually revealed a series of significant limitations and technical problems when handling titration bottles of different specifications, sizes, and heights.

[0003] Utility model patent CN210347565U discloses an automatic titrator for laboratory use. By setting up a tube rack, a horizontal connecting sleeve, a clamping device, and a support device, the position of the burette in the horizontal direction can be adjusted. At the same time, the support device can be adapted to different models and specifications of titration bottles, and the horizontal position of the titration bottle can be adjusted by moving the support device, thereby improving the flexibility and centering accuracy of the titration operation.

[0004] However, this device only supports horizontal adjustment and lacks vertical height adjustment for the titration bottle. In practical use, when changing titration bottles of different heights or adjusting the distance between the titration head and the liquid surface, the device itself cannot adjust the height vertically. This can lead to the titration head being inserted too deeply into the liquid, causing splashing, or too shallowly, resulting in inaccurate titration, severely affecting titration accuracy and experimental safety. More seriously, the existing technology makes vertical adjustment of the titration bottle inconvenient. Operators often need to manually adjust the height using external tools such as blocks or supports, which is not only cumbersome and time-consuming but also prone to human error leading to inaccurate titration positions. This reduces the flexibility and automation of the equipment, making it difficult to meet the high requirements of modern laboratories for efficient, precise, and fully automated adjustment, especially when frequent container changes or multiple batches of continuous measurements are required. Therefore, to address the many shortcomings of the existing technology, we urgently need an innovative automated laboratory titrator to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide an automatic titrator for laboratory use, which solves the problem in the prior art that when changing titration bottles of different heights or adjusting the distance between the titration head and the liquid surface, the vertical adjustment cannot be made through the device's own structure, which may cause the titration head to be inserted too deeply into the liquid surface, resulting in splashing, or too shallowly, resulting in inaccurate titration, seriously affecting titration accuracy and experimental safety.

[0006] To achieve the above objectives, this utility model provides an automatic titrator for laboratory use, including a base, and a support frame fixedly connected to the top of the base, with a support block slidably connected to the inner side of the support frame;

[0007] The load-bearing frame has support frames on both sides, and one side of each support frame is fixedly connected to the side wall of the load-bearing block. The bottom of each support frame has a placement groove, and both sides of each support frame have support rods. One end of each of the four support rods passes through the side wall of the two support frames. An arc-shaped clamp is fixedly connected to one end of each support rod located on the inner side of the two support frames. One end of each of the four support rods is elastically connected to the outer wall of the two support frames. A cylinder is fixedly connected to the top of the load-bearing frame by bolts, and the output shaft of the cylinder passes through the top of the load-bearing frame and is fixedly connected to the top of the load-bearing block.

[0008] The base has support cylinders fixedly connected to both sides of its top, and anti-slip plates are fixedly connected to the bottom inner sides of both support cylinders.

[0009] The support block has sliders fixedly connected to both sides, and both sliders are slidably connected to the side wall of the support frame through a sliding groove.

[0010] Each of the four support rods has a tension spring fitted on one end, and one end of each of the four support rods is elastically connected to the side walls of the two support frames respectively through the tension spring.

[0011] The top two sides of the support frame are fixedly connected to top plates, and telescopic rods are fixedly connected to the four corners at the bottom of the two top plates. The bottom ends of all the telescopic rods are fixedly connected to the top of the two support frames respectively.

[0012] The connection between the output shaft of the cylinder and the support frame is a sliding connection.

[0013] This utility model discloses an automatic laboratory titrator. By installing a support frame on the base and slidingly connecting a support block inside, combined with a cylinder-driven structure that moves the support block up and down, it effectively solves the core problem of existing technologies where vertical adjustment of titration bottles is inconvenient, significantly reducing usability. It achieves automatic vertical adjustment of the burette assembly, significantly improving the equipment's adaptability to reagent containers of different heights or liquid level changes. This avoids the cumbersome manual height adjustment operations relying on external tools such as pads and supports, improving experimental efficiency and automation. The support block drives the two support frames to rise and fall synchronously, ensuring consistent burette height on both sides and guaranteeing the synchronization and accuracy of multi-channel titration. The placement groove at the bottom of the support frame provides initial positioning of the burettes, and the elastic clamping structure of the support rod and arc-shaped clamp firmly secures burettes of different specifications and diameters, preventing them from being damaged by vibration during titration. The displacement caused by liquid flow enhances the versatility and safety of the equipment; the support rod is connected to the outer wall of the support frame through an elastic connection, making the clamping force adjustable and providing a buffering effect, preventing the glass tube from breaking due to excessive clamping, thus improving the safety and reliability of operation; the cylinder, as the power source, has the advantages of fast response, high control precision, and adjustable stroke, enabling precise control of the burette height, ensuring that the burette head maintains the optimal distance from the liquid surface, reducing titration errors and liquid splashing, and improving the accuracy and repeatability of test results; the entire vertical lifting mechanism is integrated into the equipment body, with a compact structure that does not occupy additional laboratory space, making it easy to operate in limited laboratory environments; this design overcomes the deficiency of existing automatic titrators that only support horizontal adjustment, realizing coordinated adjustment in both horizontal and vertical directions, enhancing the equipment's adaptability to complex experimental scenarios, and is especially suitable for occasions requiring frequent container changes, continuous multi-batch determination, or high titration accuracy. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a top view of an embodiment of the present invention.

[0018] Figure 4 This is a side view of the support frame structure according to an embodiment of the present utility model.

[0019] Figure 5This is a bottom view of the structure of an embodiment of the present invention.

[0020] 1. Base; 2. Bearing frame; 3. Bearing block; 4. Slider; 5. Slide groove; 6. Support cylinder; 7. Anti-slip plate; 8. Cylinder; 9. Top plate; 10. Telescopic rod; 11. Support frame; 12. Placement slot; 13. Support rod; 14. Tension spring; 15. Arc-shaped clamp. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 An automatic titrator for laboratory use includes a base 1, and a support frame 2 fixedly connected to the top of the base 1. A support block 3 is slidably connected to the inner side of the support frame 2. Support frames 11 are provided on both sides of the support frame 2, and one side of each support frame 11 is fixedly connected to the side wall of the support block 3. Placement grooves 12 are provided at the bottom of each support frame 11, and support rods 13 are provided on both sides of each support frame 11. One end of each support rod 13 passes through the side wall of each support frame 11. Arc-shaped clamps 15 are fixedly connected to one end of each support rod 13 located on the inner side of each support frame 11. One end of each support rod 13 is elastically connected to the outer wall of each support frame 11. A cylinder 8 is fixedly connected to the top of the support frame 2 by bolts, and the output shaft of the cylinder 8 passes through the top of the support frame 2. The output shaft of the cylinder 8 is fixedly connected to the top of the support block 3.

[0023] In laboratory titration analysis, the required burettes are first placed into the placement slots 12 at the bottom of the two support frames 11. The placement slots 12 provide initial positioning for the burettes. Then, through the elastic action of the four support rods 13, the arc-shaped clamp 15 located at one end of the inner side of the support frame 11 clamps and fixes the outer wall of the burette. One end of the support rod 13 penetrates the side wall of the support frame 11 and is connected to the outer wall of the support frame 11 through an elastic connection structure, ensuring that the clamping force is moderate and adjustable, accommodating burettes of different diameters, achieving stable clamping without damaging the glass tube. At the same time, the reagent container containing the solution to be tested is placed on both sides of the top of the base 1, directly below the burette, ready for the titration reaction. When it is necessary to adjust the relative height between the burette and the liquid level in the reagent container, the cylinder 8 fixed on the top of the support frame 2 is activated, and its output... The cylinder 8 penetrates downwards through the top of the support frame 2 and is fixedly connected to the top of the support block 3 located inside the support frame 2. The cylinder 8 pushes the support block 3 to slide up and down along the inner wall of the support frame 2. Since the side walls of the two support frames 11 are fixedly connected to the support block 3, the support frames 11 and the burette inside them rise and fall synchronously, thereby realizing the vertical height adjustment of the burette. By controlling the stroke of the cylinder 8, the distance between the outlet end of the burette and the liquid surface of the reagent tank can be precisely adjusted to avoid the burette head being inserted too deeply, causing liquid splashing or interference with the reaction, or too shallow, causing unstable dripping and titration errors. After the adjustment is completed, the automatic titration program is started, and the titrant is dripped from the burette into the reagent tank at a set rate to complete the quantitative analysis. The entire adjustment process does not require the use of external pads or manual support tools and can be omnidirectionally adjusted on the structure of the equipment itself. The operation is simple and has good repeatability.

[0024] Furthermore, support cylinders 6 are fixedly connected to both sides of the top of the base 1, and anti-slip plates 7 are fixedly connected to the bottom inner sides of both support cylinders 6. The reagent container is placed inside the support cylinders 6, and the support cylinders 6 provide circumferential positioning and vertical support for the reagent container, preventing it from tipping over or shifting due to vibration or liquid impact during titration. At the same time, the anti-slip plates 7 contact the bottom of the reagent container, and the anti-slip texture or elastic material on their surface increases friction, effectively preventing the reagent container from sliding or rotating inside the support cylinders 6. This achieves the effect of stabilizing the reagent container, preventing displacement, and improving the safety and stability of the titration process.

[0025] Furthermore, both sides of the support block 3 are fixedly connected to sliders 4, and both sliders 4 are slidably connected to the side wall of the support frame 2 through the sliding groove 5. When the cylinder 8 drives the support block 3 to move up and down, the sliders 4 slide smoothly along the track of the sliding groove 5, providing reliable guidance for the support block 3, ensuring that it maintains a horizontal posture during the lifting process, avoiding jamming, tilting or shaking caused by unilateral force or structural eccentricity, improving the straightness and stability of the movement of the support block 3, thereby ensuring that the two side support frames 11 and the burette are lifted synchronously and evenly, achieving the effect of enhancing the lifting guidance accuracy, improving the running stability and structural reliability.

[0026] Furthermore, each of the four support rods 13 is fitted with a tension spring 14 at one end, and each of the four support rods 13 is elastically connected to the side walls of the two support frames 11 through the tension spring 14. When the burette is placed in the placement slot 12, the operator pulls the support rod 13 outward, and the tension spring 14 is stretched to generate an elastic restoring force. After releasing the hand, the support rod 13 moves inward under the action of the spring tension, thereby pushing the arc-shaped clamp 15 to clamp the outer wall of the burette, realizing automatic clamping. The elastic force provided by the tension spring 14 can be adaptively adjusted according to the diameter of the burette, which not only ensures firm clamping but also avoids excessive clamping that could cause the glass tube to break. This achieves the effects of simple clamping operation, adjustable clamping force, adaptability to different tube diameters, improved safety, and ease of use.

[0027] Furthermore, top plates 9 are fixedly connected to both sides of the top of the support frame 2, and telescopic rods 10 are fixedly connected to the four corners of the bottom of the two top plates 9. The bottom ends of all the telescopic rods 10 are fixedly connected to the top of the two support frames 11. The telescopic rods 10 extend and retract synchronously with the lifting and lowering of the support frames 11, providing additional vertical support and guidance for the support frames 11, sharing the load of the cylinder 8, and preventing the support frames 11 from sagging or swaying due to the cantilever structure during lifting and lowering. This enhances the rigidity and stability of the overall structure. At the same time, the guiding effect of the telescopic rods 10 further improves the movement accuracy of the support frames 11, achieving the effects of enhancing the structural support strength, improving the lifting and lowering stability, and extending the service life of the equipment.

[0028] Furthermore, the connection between the output shaft of the cylinder 8 and the bearing frame 2 is a sliding connection.

[0029] In summary:

[0030] During laboratory titration analysis, the reagent container containing the solution to be tested is first placed inside the support cylinders 6 fixed on both sides of the top of the base 1. The support cylinders 6 provide circumferential restraint and vertical support for the reagent container. The anti-slip plate 7 fixed to the bottom of its inner side contacts the bottom of the reagent container, using the anti-slip material to increase friction and prevent the reagent container from sliding or tipping over during titration. Then, the required burettes are placed into the placement slots 12 opened at the bottom of the two support frames 11. The placement slots 12 initially position the burettes. The operator then pulls outwards the four through support frames 11. The support rod 13 on the side wall, with a tension spring 14 sleeved at one end, is stretched to generate an elastic restoring force. When the burette is in place, the support rod 13 is released. Under the restoring action of the tension spring 14, the support rod 13 drives the arc-shaped clamp 15 at its inner end to move inward, applying a uniform clamping force to the outer wall of the burette to achieve stable fixation. At this time, the cylinder 8 fixed to the top of the support frame 2 is activated. Its output shaft passes downward through the top of the support frame 2 and is fixedly connected to the top of the support block 3. The output shaft and the mounting hole are slidably connected to ensure smooth lifting and good sealing. The cylinder 8 is activated. The support block 3 is pushed to slide up and down along the inner wall of the support frame 2. The sliders 4 fixed on both sides of the support block 3 are embedded in the grooves 5 on the side wall of the support frame 2, forming a stable sliding guide structure to prevent the support block 3 from shifting or getting stuck during movement. Since one side of each of the two support frames 11 is fixedly connected to the side wall of the support block 3, the support frames 11 and the burette inside them rise and fall synchronously with the support block 3. At the same time, multiple telescopic rods 10 are set on the top plates 9 fixed on both sides of the top of the support frame 2. One end of the telescopic rods 10 is connected to the top plate 9, and the other end is connected to the top of the support frame 11. During the rising and falling process of the support frame 11, The synchronous telescopic mechanism provides additional support and guidance, enhancing the overall structural rigidity and preventing sagging or swaying caused by cantilever stress. By controlling the stroke of cylinder 8, the vertical distance between the burette outlet and the liquid surface in the reagent tank can be precisely adjusted, avoiding splashing caused by excessive insertion of the burette head or unstable dripping caused by insufficient insertion. After adjustment, the automatic titration program is started, and the titrant is dripped into the reagent tank at the set rate to complete the reaction. The entire height adjustment process does not require external pads or manual tools, realizing omnidirectional automatic adjustment within the equipment's own structure. It is easy to operate and highly repeatable.The support cylinder 6 and anti-slip plate 7 on the base 1 effectively improve the placement stability of the reagent container, preventing displacement or tipping due to vibration or liquid flow during titration, thus ensuring experimental safety and the continuity of the reaction process. The placement groove 12 at the bottom of the support frame 11 provides initial positioning for the burette, and the clamping structure of the support rod 13 and the arc-shaped clamping plate 15 enables rapid fixing of burettes of different diameters. The tension spring 14, as an elastic connector, makes the clamping force adjustable and has a buffering function, ensuring a firm clamping while preventing the glass tube from being crushed, thus improving the safety and adaptability of operation. The cylinder 8 drives the carrier block 3 to move up and down along the carrier frame 2, realizing the automatic lifting and lowering adjustment of the burette assembly in the vertical direction, completely solving the core problem of "inconvenience in vertical adjustment of the titration bottle" in the existing technology, eliminating the need for external pads or supports, and significantly improving the flexibility and automation level of the equipment. The slider 4 on the carrier block 3 cooperates with the sliding groove 5 on the carrier frame 2 to provide precise guidance for the lifting process, ensuring smooth operation. The device operates smoothly and without tilting, ensuring consistent height of the burettes on both sides. The top plate 9 and telescopic rod 10 provide additional structural support and motion guidance for the support frame 11, sharing the load of cylinder 8 and preventing swaying or deformation caused by the cantilever structure, thus enhancing the overall rigidity and operational stability of the equipment. The sliding design at the connection between the output shaft of cylinder 8 and the bearing frame 2 allows the output shaft to extend and retract freely, reducing frictional resistance, preventing jamming, and ensuring long-term stable operation of cylinder 8. The entire device integrates vertical lifting, elastic clamping, stable support, and multi-point guiding structures, achieving precise, convenient, and automated adjustment of the burette height. This effectively avoids problems such as splashing and titration errors caused by improper distance between the burette head and the liquid surface, improving the accuracy and repeatability of test results. The device has a compact structure and simplified operation process, reducing the risk of errors caused by human intervention. It meets the needs of modern laboratories for high-precision, high-efficiency, and intelligent analytical instruments, and is especially suitable for multi-batch, continuous, and high-requirement quantitative analysis scenarios, demonstrating good practical value and promising prospects for promotion.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An automatic titrator for laboratory use, comprising a base, characterized in that, It also includes a support frame fixedly connected to the top of the base, and a support block slidably connected to the inner side of the support frame; The load-bearing frame has support frames on both sides, and one side of each support frame is fixedly connected to the side wall of the load-bearing block. The bottom of each support frame has a placement groove, and both sides of each support frame have support rods. One end of each of the four support rods passes through the side wall of the two support frames. An arc-shaped clamp is fixedly connected to one end of each support rod located on the inner side of the two support frames. One end of each of the four support rods is elastically connected to the outer wall of the two support frames. A cylinder is fixedly connected to the top of the load-bearing frame by bolts, and the output shaft of the cylinder passes through the top of the load-bearing frame and is fixedly connected to the top of the load-bearing block.

2. The automatic laboratory titrator as described in claim 1, characterized in that, The base has support cylinders fixedly connected to both sides of its top, and anti-slip plates are fixedly connected to the bottom inner sides of both support cylinders.

3. The automatic laboratory titrator as described in claim 1, characterized in that, Both sides of the support block are fixedly connected to sliders, and both sliders are slidably connected to the side wall of the support frame through a sliding groove.

4. The automatic laboratory titrator as described in claim 1, characterized in that, Each of the four support rods has a tension spring fitted on one end, and each of the four support rods is elastically connected to the side walls of the two support frames through the tension springs.

5. The automatic laboratory titrator as described in claim 1, characterized in that, The top two sides of the support frame are fixedly connected to top plates, and telescopic rods are fixedly connected to the four corners at the bottom of the two top plates. The bottom ends of all the telescopic rods are fixedly connected to the top of the two support frames respectively.

6. The automatic laboratory titrator as described in claim 1, characterized in that, The connection between the cylinder's output shaft and the support frame is a sliding connection.

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