Device for improving chemical analysis titration precision

Abstract

The utility model belongs to the technical field of chemical experiment equipment, in particular to a device for improving chemical analysis titration precision, which comprises a base, support plates and a main control panel, the support plates are vertically mounted on the upper end surfaces of the left and right sides of the base, and the main control panel is embedded and fixed at the upper end of the base. Through the arrangement of the sliding support, the laser generator, the photosensitive element and the linkage support, droppers for titration operation are sequentially inserted into dropper grooves, then test tubes for collection are placed in the test tube rack, the tops of the test tubes are kept vertical, and then the tail end of the outer side of the linkage support is held and dragged leftwards and rightwards to drive the sliding support. In the process, a pulley mechanism at the bottom end of a limiting pressing plate rolls in a wheel track in a positioned mode, a sliding support is driven to move left and right in a positioning groove, and three sets of laser generators at the peripheral end of the bottom of a dropper groove continuously emit low-energy laser beams downwards in the process. And the three groups of laser beams irradiate three groups of photosensitive elements at the periphery of the test tube rack.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experiment equipment, in particular to a device for improving the titration accuracy of chemical analysis. Background Technique

[0002] Titration refers to a means of quantitative analysis and is also a chemical experiment operation. It determines the content of a certain solute through the quantitative reaction of two solutions. It indicates the titration end point according to the color change of the indicator, and then visually observes the consumed volume of the standard solution to calculate the analysis result. During the titration process, due to the shaking of the operator's hand, a device for improving the titration accuracy of chemical analysis is usually adopted.

[0003] The prior art has the following deficiencies: In the "device for improving the titration accuracy of chemical analysis" with the publication number of CN213302121U in the prior art, "it includes a mounting frame, and a fixing device is fixedly connected to the outer side of the inner wall of the bottom of the mounting frame. The fixing device includes a fixing plate, a first connecting plate is fixedly connected to the outer side of the outer surface of the fixing plate, and a connecting rod is rotatably connected to the inner side of the inner surface of the first connecting plate."

[0004] Through the device for improving the titration accuracy of chemical analysis, the above structure realizes the primary fixation of the burette through the second clamp, and then through the mutual cooperation of the clamping plate, the first sliding block and the limiting rod, the secondary fixation of the burette is realized, preventing the phenomenon of hand shaking caused by hand fatigue of the user due to holding the titration device for titration. However, this structure only provides one-way position fixation. Since titration requires the cooperation of the droppers on both the upper and lower sides with the test tube, unilateral fixation cannot ensure the accuracy of titration, and the existing structure still judges the titration position by visual observation, with insufficient accuracy.

[0005] The prior art has the following problems: The existing device for improving the titration accuracy of chemical analysis still uses the judgment method of visual observation to determine the titration position, and only fixes the titration structure on one side, unable to completely avoid the phenomenon of manual holding. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the utility model provides a device for improving the titration accuracy of chemical analysis, which solves the problem of insufficient titration accuracy existing nowadays.

[0007] To achieve the above object, the utility model provides the following technical solution: A device for improving the titration accuracy of chemical analysis, including a base, a support plate, and a main control panel. The support plates are vertically installed on the upper end faces of the left and right sides of the base, the main control panel is embedded and fixed on the upper end of the base, a connecting beam is connected to the inner side of the support plates, and a dropper groove is embedded in the connecting beam. Its characteristics are as follows:

[0008] A laser generator is fixedly connected to the peripheral end of the bottom of the dropper groove. A sliding bracket is also provided at the inner end of the middle part of the base. A test tube rack is vertically connected to the middle end face of the sliding bracket. A photosensitive element is arranged on the peripheral end face of the test tube rack. A linkage bracket is also connected to one side of the upper end of the sliding bracket;

[0009] The base also includes a positioning groove, a sliding groove and a wheel rail. The positioning groove is opened on the upper end face of the middle part of the base. The sliding grooves are symmetrically opened at the left and right ends inside the positioning groove. The wheel rail is arranged on the upper end of the base and is symmetrically distributed with the positioning groove as the axis.

[0010] As a preferred technical solution of the present invention, the linkage bracket is integrally in a "7"-shaped right-angle structure. The linkage bracket also includes a limiting pressure plate and a pulley mechanism. The limiting pressure plate is fixedly connected to the side end of the linkage bracket. The pulley mechanism is fixedly installed at the bottom end of the limiting pressure plate.

[0011] As a preferred technical solution of the present invention, the linkage bracket is integrally divided into a columnar structure and a block structure. The bottom end of the block structure is fixedly connected to the sliding bracket. The columnar structure extends outward and wraps around the periphery of the block structure. There are four groups of linkage brackets, and they are symmetrically distributed with the positioning groove as the axis.

[0012] As a preferred technical solution of the present invention, the sliding bracket is integrally a hollow rectangular bar structure connected by a rectangular block in the middle, and its left and right sides are respectively inserted into the sliding grooves.

[0013] As a preferred technical solution of the present invention, the inner end of the base is inserted into the gap between the limiting pressure plate and the sliding bracket, and the pulley mechanism is embedded in the wheel rail and there is a rolling connection.

[0014] As a preferred technical solution of the present invention, three groups of laser generators are provided at the bottom end of each dropper groove, and three groups of photosensitive elements are provided. They are distributed at the same positions on the periphery of the test tube rack. Before the equipment is used, the positions of the photosensitive elements and the laser generators need to be adjusted to keep them on the same horizontal axis.

[0015] As a preferred technical solution of the present invention, there is a circuit connection relationship between the inside of the main control panel and the photosensitive element. The main control panel includes a display structure and a physical control structure.

[0016] Compared with the prior art, the present invention provides a device for improving the titration accuracy of chemical analysis, and has the following beneficial effects:

[0017] The device for improving the titration accuracy of chemical analysis is provided with a sliding bracket, a laser generator, a photosensitive element, and a linkage bracket. The operator first inserts the droppers for titration operations into the dropper slots in sequence, then places the test tube for collection into the test tube rack and keeps the top vertical. Then, hold the outer end of the linkage bracket and drag it left and right to drive the sliding bracket. During this process, the pulley mechanism at the bottom of the limit pressing plate rolls and positions in the wheel rail, and the sliding bracket is driven to move left and right in the positioning slot. During this process, the three laser generators at the peripheral end of the bottom of the dropper slot continuously emit low-energy laser beams downward. When the test tube rack moves to the appropriate position, the three laser beams irradiate the three photosensitive elements on the periphery of the test tube rack. At this time, the sensor inside the photosensitive element sends information to the main control panel, and the main control panel transmits the information to the operator through the display screen. The operator stops moving the linkage bracket. At this time, the bottom of the dropper in the dropper slot is directly opposite the middle of the test tube at the upper end of the test tube rack. By repeating the above steps, titration operations are carried out under different droppers in sequence. Through the above process, the titration operation can be positioned by a mechanical structure, and three vertical laser beams and three photosensitive elements distributed at corresponding positions are used to accurately define the positions of the dropper and the test tube, thereby improving the accuracy of the titration operation and avoiding the phenomenon of hand shaking during manual titration or difficulty in aligning up and down with the naked eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the position of the laser generator of the present utility model;

[0020] Figure 3 is a schematic diagram of the overall structure of the sliding bracket of the present utility model;

[0021] Figure 4 is a schematic diagram of the structure of the linkage bracket of the present utility model.

[0022] In the figure: 1, base; 101, positioning slot; 102, chute; 103, wheel rail; 2, support plate; 3, main control panel; 4, connecting beam; 5, dropper slot; 6, laser generator; 7, sliding bracket; 8, test tube rack; 9, photosensitive element; 10, linkage bracket; 1001, limit pressing plate; 1002, pulley mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4 , in this embodiment: A device for improving the titration accuracy of chemical analysis includes a base 1, a support plate 2, and a main control panel 3. The support plate 2 is vertically installed on the upper end faces of the left and right sides of the base 1. The support plate 2 supports and connects a beam 4. The main control panel 3 is embedded and fixed on the upper end of the base 1. The main control panel 3 receives the signal from the photosensitive element 9 and makes a response. The inner side of the support plate 2 is connected to a connecting beam 4. The connecting beam 4 bears the installation of a dropper groove 5. The dropper groove 5 is embedded inside the connecting beam 4. The dropper groove 5 bears the fixation of the dropper. It is characterized in that:

[0025] A laser generator 6 is fixedly connected to the peripheral end of the bottom of the dropper groove 5. The laser generator 6 emits a positioning laser beam. A sliding bracket 7 is further provided at the inner end of the middle part of the base 1. The sliding bracket 7 bears the fixation of a test tube rack 8. A test tube rack 8 is vertically connected to the middle end face of the sliding bracket 7. The test tube rack 8 fixes the test tube. A photosensitive element 9 is arranged on the peripheral end face of the test tube rack 8. The photosensitive element 9 senses the laser beam and sends a signal. A linkage bracket 10 is also connected to one side of the upper end of the sliding bracket 7. The linkage bracket 10 assists in driving the sliding bracket 7 to move;

[0026] The base 1 further includes a positioning groove 101, a sliding groove 102, and a wheel rail 103. The positioning groove 101 is opened on the upper end face of the middle part of the base 1. The sliding grooves 102 are symmetrically opened at the left and right ends inside the positioning groove 101. The wheel rail 103 is arranged on the upper end of the base 1 and is symmetrically distributed with the positioning groove 101 as the axis. By setting the wheel rails 103 at symmetrical positions, the symmetrically distributed pulley mechanism 1002 can slide stably;

[0027] In this embodiment, the linkage bracket 10 is integrally in a right-angled "7" shape. The linkage bracket 10 further includes a limit pressing plate 1001 and a pulley mechanism 1002. The limit pressing plate 1001 is fixedly connected to the side end of the linkage bracket 10, and the pulley mechanism 1002 is fixedly installed at the bottom end of the limit pressing plate 1001. The whole linkage bracket 10 is divided into a columnar structure and a block structure. The bottom end of its block structure is fixedly connected to the sliding bracket 7, and the columnar structure extends outward and wraps around the periphery of the block structure. There are four groups of linkage brackets 10, which are symmetrically distributed with the positioning groove 101 as the axis of symmetry. By setting the linkage brackets 10 at symmetrical positions, the movement of the sliding bracket 7 can be stably driven. The sliding bracket 7 is integrally a hollow rectangular strip structure connected by a rectangular block in the middle, and its left and right sides are respectively inserted into the inside of the chute 102. The sliding bracket 7 inserted into the inside of the chute 102 can position the sliding bracket 7. The inner end of the base 1 is inserted into the gap between the limit pressing plate 1001 and the sliding bracket 7, and the pulley mechanism 1002 is embedded in the rail 103 and has a rolling connection. The rolling connection through the pulley mechanism 1002 can reduce the friction during movement. Three laser generators 6 are provided at the bottom end of each dropper slot 5, and three photosensitive elements 9 are provided. They are distributed around the test tube rack 8 at the same positions. Before using the device, the positions of the photosensitive element 9 and the laser generator 6 need to be adjusted to keep them on the same horizontal axis. Setting the coaxial photosensitive element 9 and laser generator 6 can ensure accurate positioning. There is a circuit connection relationship between the inside of the main control panel 3 and the photosensitive element 9. The main control panel 3 includes a display structure and a physical control structure.

[0028] The working principle and usage process of the present utility model: The operator first inserts the droppers for the titration operation into the dropper slots 5 in sequence, then places the test tubes for collection into the test tube rack 8 and keeps the tops vertical. Then, hold the outer end of the linkage bracket 10 and drag it left and right to drive the sliding bracket 7. During this process, the pulley mechanism 1002 at the bottom end of the limit pressing plate 1001 rolls and positions in the rail 103, and the sliding bracket 7 is driven to move left and right in the positioning groove 101. During this process, the three laser generators 6 at the circumferential end of the bottom of the dropper slot 5 continuously emit low-energy laser beams downward. When the test tube rack 8 moves to a suitable position, the three laser beams irradiate the three photosensitive elements 9 outside the test tube rack 8. At this time, the sensors inside the photosensitive elements 9 send information to the main control panel 3, and the main control panel 3 transmits the information to the operator through the display screen. The operator stops moving the linkage bracket 10. At this time, the bottom end of the dropper in the dropper slot 5 is directly opposite to the middle of the test tube at the upper end of the test tube rack 8. By repeating the above steps, the titration operation is carried out under different droppers in sequence.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for improving the titration accuracy of chemical analysis, comprising a base (1), a support plate (2), and a main control panel (3), wherein the support plate (2) is vertically mounted on the upper end surfaces of the left and right sides of the base (1), the main control panel (3) is embedded and fixed on the upper end of the base (1), the inner side of the support plate (2) is connected to a connecting beam (4), and the interior of the connecting beam (4) is embedded with a dropper groove (5), characterized in that: A laser generator (6) is fixedly connected to the bottom peripheral end of the dropper groove (5); a sliding bracket (7) is also provided at the middle inner end of the base (1); a test tube rack (8) is vertically connected to the middle end surface of the sliding bracket (7); a photosensitive element (9) is provided on the outer end surface of the test tube rack (8); and a linkage bracket (10) is also connected to one side of the upper end of the sliding bracket (7); The base (1) further comprises a positioning groove (101), a slide groove (102) and a wheel track (103); the positioning groove (101) is provided on the upper end surface of the middle part of the base (1); the slide groove (102) is symmetrically provided at the left and right ends of the positioning groove (101); and the wheel track (103) is arranged at the upper end of the base (1) and is symmetrically distributed with the positioning groove (101) as the axis.

2. A device for improving the accuracy of chemical analysis titration according to claim 1, characterized in that: The linkage bracket (10) is an overall "7"-shaped right-angle structure. The linkage bracket (10) further comprises a limiting pressure plate (1001) and a pulley mechanism (1002). The limiting pressure plate (1001) is fixedly connected to a side end of the linkage bracket (10), and the pulley mechanism (1002) is fixedly mounted to a bottom end of the limiting pressure plate (1001).

3. A device for improving the accuracy of chemical analysis titration according to claim 1, characterized in that: The linkage bracket (10) is generally divided into a columnar structure and a block structure, wherein the bottom end of the block structure is fixedly connected to the sliding bracket (7), and the columnar structure extends outward and covers the periphery of the block structure. The linkage bracket (10) is provided with four groups, and is symmetrically distributed with the positioning groove (101) as the axis.

4. A device for improving the accuracy of chemical analysis titration according to claim 1, characterized in that: The sliding bracket (7) is a hollow rectangular strip structure connected by a rectangular block in the middle, and its left and right sides are respectively inserted into the inside of the sliding groove (102).

5. A device for improving the accuracy of chemical analysis titration according to claim 2, characterized in that: The inner end of the base (1) is inserted into the gap between the limiting pressure plate (1001) and the sliding bracket (7), and the pulley mechanism (1002) is embedded in the wheel rail (103) and is in rolling connection.

6. A device for improving the accuracy of chemical analysis titration according to claim 1, characterized in that: The laser generator (6) is provided in three groups at the bottom of each group of dropper grooves (5), and the photosensitive elements (9) are provided in three groups, and are distributed at the same position on the periphery of the test tube rack (8). Before the device is used, the positions of the photosensitive elements (9) and the laser generator (6) need to be adjusted to keep them on the same horizontal axis.

7. A device for improving the accuracy of chemical analysis titration according to claim 1, characterized in that: The main control panel (3) is internally connected to the photosensitive element (9) by a circuit, and the main control panel (3) comprises a display structure and a physical control structure.

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