Potentiometric titrator

Abstract

The utility model provides a potentiometric titrator. The potentiometric titrator comprises a potentiometric titrator body, an adjusting mechanism and an electrode bracket, the adjusting mechanism comprises a guide rod, a sliding block, a locking piece and a split block, the guide rod is vertically installed on the potentiometric titrator body, the sliding block and the split block are both arranged on the guide rod in a sleeving mode and can slide in the axial direction of the guide rod, the sliding block is separably supported at the bottom of the split block, and the locking piece is arranged on the sliding block. The sliding block is used for limiting the height position of the split block relative to the potentiometric titrator body, and the locking piece is mounted on the sliding block. The sliding block is locked on the guide rod through the adjusting mechanism and the locking piece, the bottom of the split block is supported, height limitation of the electrode support is formed, when the electrode support needs to be lifted and is separated from the reaction container, the split block can be directly slid upwards, the electrode is lifted away from the reaction container, unlocking and locking of the locking piece are not needed, and therefore the electrode support is convenient to use. And the operation convenience degree is improved.

Description

Technical Field

[0001] This utility model relates to the field of analytical instrument technology, specifically to a potentiometric titrator. Background Technology

[0002] An automatic potentiometric titrator is a laboratory analytical instrument designed based on the potentiometric principle. It is primarily used for volumetric analysis (titer analysis) and can automatically determine the titration endpoint. The automatic potentiometric titrator is a common analytical instrument for volumetric analysis designed based on the potentiometric principle. The sample is placed in a reaction vessel, electrodes are inserted, and titrant is injected. Appropriate indicating and reference electrodes are selected to form a working cell with the analyte solution. As the titrant is added, a chemical reaction occurs, causing the concentration of the analyte ion to change continuously, thus changing the potential of the indicating electrode. Near the titration endpoint, the concentration of the analyte ion changes abruptly, causing a jump in the electrode potential. Therefore, the titration endpoint can be determined based on this jump in electrode potential.

[0003] For example, Chinese Patent 202220274615.3 discloses an automatic potentiometric titrator, including a detection platform, electrodes, a support device, and an adjustment component. The support device and the adjustment component are mounted on the detection platform. The support device is used to support and fix the electrodes. The adjustment component includes an adjustment block and a threaded rod. One end of the threaded rod is threadedly connected to the adjustment block, and the other end is connected to the electrodes. By rotating the adjustment block, the electrodes connected to the threaded rod are moved to adjust the height of the electrode's potential relative to the endpoint potential.

[0004] In the aforementioned existing technology, after titration, the electrode needs to be moved upwards and removed from the reaction vessel before the reaction vessel can be transferred. This process requires unlocking the locking bolt at the electrode height position, moving the electrode upwards, removing the electrode from the reaction vessel, and then tightening the locking bolt again, which is inconvenient. Furthermore, after the above operations, because the height position has changed, it is necessary to readjust the height position and re-lock the bolt when changing samples and performing the next titration, which is quite troublesome. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a potentiometric titrator that solves the technical problem that the electrode height adjustment operation in the prior art requires repeated height sliding and locking, which is inconvenient to operate.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a potentiometric titrator, comprising:

[0008] The potentiometric titrator body;

[0009] The adjustment mechanism includes a guide rod, a slider, a locking element, and a split block. The guide rod is vertically mounted on the potentiometric titrator body. The slider and the split block are both sleeved on the guide rod and can slide along the axial direction of the guide rod. The slider is detachably supported at the bottom of the split block, limiting the height of the split block relative to the potentiometric titrator body. The locking element is mounted on the slider to limit its sliding relative to the guide rod.

[0010] An electrode holder is mounted on the split block and has at least one snap-fit ​​groove for snapping in the electrode.

[0011] In some embodiments, a magnetic attraction assembly is provided between the split block and the slider. The magnetic attraction assembly includes a pair of magnets that can attract each other and are respectively installed on opposite sides of the split block and the slider.

[0012] In some embodiments, the top of the slider is provided with a cushioning pad.

[0013] In some embodiments, the split block is provided with lifting ears on both sides.

[0014] In some embodiments, the potentiometric titrator body is provided with a container platform, and the container platform is provided with a positioning component for clamping the reaction container.

[0015] In some embodiments, the positioning assembly includes a bidirectional screw, a clamping knob, a connecting rod, and a clamping rod. A groove is provided on the container platform. The bidirectional screw is rotatably connected to the groove and extends through the groove to the outside of the container platform, where it is connected to the clamping knob. Two connecting rods are threadedly connected to two opposite threads on the bidirectional screw and are respectively connected to one of the clamping rods.

[0016] In some embodiments, two anti-slip blocks are connected to the clamping rod.

[0017] In some embodiments, the anti-slip clamp is an elastic rubber semi-circular block.

[0018] In some embodiments, the slider includes a base block, a secondary adjustment assembly, and a support base. The base block is sleeved on the guide rod and can slide along the axial direction of the guide rod. The secondary adjustment assembly is mounted on the base block and has a movable end that can move linearly along the axial direction of the guide rod. The movable end is connected to the support base, and the support base is detachably supported at the bottom of the split block.

[0019] In some embodiments, the secondary adjustment assembly includes a guide seat, a movable block, a threaded rod, and an adjustment knob. The guide seat is fixedly connected to the base block. The threaded rod is rotatably connected to the inner side of the guide seat and passes through the guide seat to its bottom, and is connected to the adjustment knob. The movable block is threadedly connected to the threaded rod and is slidably connected to the guide seat.

[0020] Compared with existing technologies, the potentiometric titrator provided by this invention uses an adjustment mechanism to lock the slider onto the guide rod with a locking element, and provides bottom support for the split block, thus limiting the height of the electrode holder. This height-locked slider ensures that when the electrode holder is positioned on the slider, the electrode can be inserted into the reaction vessel and is in working condition. When it is necessary to detach the reaction vessel, the split block can be slid upwards to lift the electrode away from the reaction vessel without needing to unlock and lock the electrode holder, improving operational convenience. Furthermore, when the sample is changed while the reaction vessel remains the same size, the locking position of the slider does not change, and the electrode remains at a height suitable for insertion into the reaction vessel, eliminating the need for readjustment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the potentiometric titrator provided in this embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the sliding block of the potentiometric titrator provided in this embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the sliding of the split block and the upward adjustment of the support position of the potentiometric titrator provided in this embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Potentiometric titrator body; 101. Burette; 102. Reaction vessel; 103. Electrode; 104. Titration bottle; 105. Transfer pump;

[0026] 2. Adjustment mechanism; 21. Guide rod; 22. Slider; 221. Base block; 222. Secondary adjustment assembly; 2221. Guide seat; 2222. Movable block; 2223. Threaded rod; 2224. Adjustment knob; 223. Support seat; 2201. Buffer pad; 23. Locking component; 24. Split block; 2401. Lifting lug;

[0027] 3. Electrode holder; 301. Snap-fit ​​groove;

[0028] 4. Magnetic suction assembly; 41. Magnet;

[0029] 5. Container platform;

[0030] 6. Positioning assembly; 61. Bidirectional screw; 62. Clamping knob; 63. Connecting rod; 64. Clamping rod; 65. Anti-slip clamping block. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] To address the inconvenience of repeatedly sliding and locking the electrode height during adjustment, this invention provides a potentiometric titrator. The adjustable mechanism uses a locking element to secure the slider to the guide rod and provides bottom support for the split block, thus limiting the height of the electrode holder. This height-locked slider ensures that the electrode can be inserted into the reaction vessel and is in working condition when the electrode holder is positioned on the slider. When detaching from the reaction vessel, the split block can be slid upwards to lift the electrode away without needing to unlock and lock the locking element, significantly improving operational convenience.

[0033] Please see Figure 1-3 This utility model provides a potentiometric titrator, including a potentiometric titrator body 1, an adjustment mechanism 2, and an electrode holder 3. The adjustment mechanism 2 is mounted on the potentiometric titrator body 1. The electrode holder 3 is mounted on the split block 24 and has at least one locking groove 301 for locking the electrode, on which the electrode 103 is locked. The potentiometric titrator body 1 also includes a titrant bottle 104 and a delivery pump 105. The delivery pump 105 can be a peristaltic pump. The titrant bottle 104 and the inlet end of the delivery pump 105 are connected through a pipe, and the outlet end of the delivery pump 105 is connected to the burette 101 through a pipe to deliver titrant to the burette 101.

[0034] Understandably, the number of locking slots 301 is preferably three, which can lock in electrodes such as temperature electrodes and pH electrodes. The burette 101 is inserted into a through hole opened on the electrode holder 3.

[0035] To achieve specific height adjustment and control the suspension height of electrode 103, the adjustment mechanism 2 includes a guide rod 21, a slider 22, a locking element 23, and a split block 24. The guide rod 21 is vertically mounted on the potentiometric titrator body 1. The slider 22 and the split block 24 are both sleeved on the guide rod 21 and can slide along the axial direction of the guide rod 21 for height adjustment. The slider 22 is detachably supported at the bottom of the split block 24, limiting the height position of the split block 24 relative to the potentiometric titrator body 1. The split block 24 can slide freely, and its lowest position is limited by the slider 22. When it is necessary to move the reaction vessel, the split block 24 is moved upwards directly. After removing the reaction vessel, the split block 24 is slid down and placed on the slider 22. The locking element 23 is installed on the slider 22 to restrict the slider 22 from sliding relative to the guide rod 21. The locking element 23 is a locking bolt, which is rotated and pressed against the guide rod 21 to form a locking position, thereby positioning the slider 22 on the guide rod 21.

[0036] In this embodiment, the guide rod 21 is cylindrical, and a strip-shaped limiting groove is provided on one side of the guide rod 21. The slider 22 is annular, and a protrusion that is slidably connected in the limiting groove is provided on the inner side of the annular shape to provide guidance and prevent the slider 22 from rotating relative to the guide rod 21.

[0037] In one embodiment, please refer to Figure 2 In order to improve the relatively stable detachable connection when the split block 24 abuts against the top of the slider 22, a magnetic attraction component 4 is provided between the split block 24 and the slider 22. The magnetic attraction component 4 includes a pair of magnets 41 that can attract each other, which are respectively installed on the opposite side of the split block 24 and the slider 22. When the split block 24 slides down and abuts against the top of the slider 22, it provides a magnetic attraction connection, improves the stability of the connection, and facilitates quick separation when separation is required, making it convenient to use.

[0038] In this embodiment, the top of the slider 22 is provided with a buffer pad 2201, which can directly release the split block 24 and allow the split block 24 to slide freely, with the buffer pad 2201 providing cushioning.

[0039] In this embodiment, the two sides of the split block 24 are provided with lifting ears 2401, which makes it easy to pinch the split block 24 and move it up and down.

[0040] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The potentiometric titrator body 1 is provided with a container platform 5, and the container platform 5 is provided with a positioning component 6 for clamping the reaction container. The adjustment mechanism 2 is also installed on the container platform 5.

[0041] Specifically, to facilitate the positioning of reaction vessels 102 of different sizes below the electrode support 3, the positioning assembly 6 includes a bidirectional screw 61, a clamping knob 62, connecting rods 63, and clamping rods 64. A sliding groove is provided on the container platform 5. The bidirectional screw 61 is rotatably connected to the sliding groove and extends through the sliding groove to the outside of the container platform 5, connecting to the clamping knob 62. The two connecting rods 63 are threaded to the two opposite threads of the bidirectional screw 61 and are respectively connected to one of the clamping rods 64. By rotating the clamping knob 62, the bidirectional screw 61 is rotated, causing the two connecting rods 63 to move in opposite directions along the sliding groove, forming the two clamping rods 64 to move closer or further apart, for clamping and releasing.

[0042] Understandably, the bidirectional screw 61 has two opposite threads, and the two connecting rods 63 are threadedly connected to the two opposite threads of the bidirectional screw 61.

[0043] Furthermore, in order to center the circular reaction vessel below the electrode support 3 during clamping, two anti-slip blocks 65 are connected to the clamping rod 64. The four anti-slip blocks 65 form a four-point positioning, which pushes against the reaction vessel during clamping and forms a four-point clamping, thus achieving a centered positioning.

[0044] Furthermore, to facilitate the handling and insertion of reaction vessels of the same specifications, the anti-slip clamp 65 is an elastic rubber semi-circular block with a certain elastic deformation space, which can be directly extracted and inserted without readjusting the clamp.

[0045] Understandably, since the elastic rubber semicircular block can be elastically compressed, it can be pulled out of the clamp under external force when the clamping force is not particularly tight, allowing for direct extraction. Similarly, when the reaction container is extracted and reinserted between the four anti-slip clamps 65, the anti-slip clamps 65 can be squeezed and compressed. Therefore, when the reaction container pushes the anti-slip clamps 65 and inserts them between the four anti-slip clamps 65, it can be squeezed and inserted to position the reaction container.

[0046] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3In order to fine-tune the support height of the split block 24 after the height position of the slider 22 is determined, the slider 22 includes a base block 221, a secondary adjustment component 222, and a support base 223. The base block 221 is sleeved on the guide rod 21 and can slide along the axial direction of the guide rod 21. The secondary adjustment component 222 is installed on the base block 221 and has a movable end that can move linearly along the axial direction of the guide rod 21. Its movable end is connected to the support base 223. The support base 223 is detachably supported at the bottom of the split block 24. The distance between the support base 223 and the base block 221 is adjusted by the secondary adjustment component 222. After adjusting the overall height position of the slider 22, the height position is fine-tuned.

[0047] Understandably, the locking bolt is set on the base block 221, threaded and passing through the base block 221, and abuts against the guide rod 21.

[0048] Specifically, to facilitate fine-tuning of the height, the secondary adjustment component 222 includes a guide seat 2221, a movable block 2222, a threaded rod 2223, and an adjustment knob 2224. The guide seat 2221 is fixedly connected to the base block 221. The threaded rod 2223 is rotatably connected to the inner side of the guide seat 2221 and passes through the guide seat 2221 to its bottom, connecting with the adjustment knob 2224. The movable block 2222 is threadedly connected to the threaded rod 2223 and slidably connected to the guide seat 2221. By rotating the adjustment knob 2224, the threaded rod 2223 is rotated, causing the movable block 2222 to slide up and down along the guide seat 2221. The movable block 2222 is connected to the support seat 223 to adjust the position of the support seat 223.

[0049] To better understand this utility model, the following is combined with... Figures 1 to 3The technical solution of this utility model is described in detail as follows: The reaction vessel 102 is placed on the vessel platform 5. The clamping knob 62 is rotated to clamp the reaction vessel 102 using the clamping rod 64 and the anti-slip block 65. Then, the locking member 23 is loosened, and the slider 22 is moved up and down to insert the electrode on the electrode holder 3 into the reaction vessel 102. The locking member 23 is then tightened to position the slider 22. The adjusting knob 2224 is rotated as needed to fine-tune the height of the split block 24, and then titration is performed. After titration is complete, the split block 24 is pushed upwards to place the electrode... Remove the electrode from the reaction vessel 102, then move the reaction vessel aside and release the split block 24. If the next sample titration is to be performed immediately, the electrode needs to be removed from the locking groove 301 for cleaning and then reinstalled. If the reaction vessels 102 are of the same specification and the liquid level of the sample is basically the same, simply push the split block 24 up to insert the reaction vessel 102 directly between the four anti-slip clamps 65, then put the split block 24 down on top of the slider 22 and insert it into the reaction vessel 102. No height adjustment or clamping adjustment is required, which is convenient for use.

[0050] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A potentiometric titrator, characterized in that, include: The potentiometric titrator body; The adjustment mechanism includes a guide rod, a slider, a locking element, and a split block. The guide rod is vertically mounted on the potentiometric titrator body. The slider and the split block are both sleeved on the guide rod and can slide along the axial direction of the guide rod. The slider is detachably supported at the bottom of the split block, limiting the height position of the split block relative to the potentiometric titrator body. The locking element is mounted on the slider to limit the sliding of the slider relative to the guide rod. as well as An electrode holder is mounted on the split block and has at least one snap-fit ​​groove for snapping in the electrode.

2. The potentiometric titrator according to claim 1, characterized in that, A magnetic attraction assembly is provided between the split block and the slider. The magnetic attraction assembly includes a pair of magnets that can attract each other and are respectively installed on opposite sides of the split block and the slider.

3. The potentiometric titrator according to claim 1, characterized in that, The top of the slider is equipped with a cushioning pad.

4. The potentiometric titrator according to claim 1, characterized in that, The split block has pull tabs on both sides.

5. The potentiometric titrator according to claim 1, characterized in that, The potentiometric titrator body is equipped with a container platform, and the container platform is equipped with a positioning component for clamping the reaction container.

6. The potentiometric titrator according to claim 5, characterized in that, The positioning assembly includes a bidirectional screw, a clamping knob, connecting rods, and clamping rods. A slide groove is provided on the container platform. The bidirectional screw is rotatably connected to the slide groove and extends through the slide groove to the outside of the container platform, where it is connected to the clamping knob. The two connecting rods are threaded onto two opposite threads of the bidirectional screw and are each connected to one of the clamping rods.

7. The potentiometric titrator according to claim 6, characterized in that, Two anti-slip blocks are connected to the clamp rod.

8. The potentiometric titrator according to claim 7, characterized in that, The anti-slip clamp is an elastic rubber semi-circular block.

9. The potentiometric titrator according to claim 1, characterized in that, The slider includes a base block, a secondary adjustment component, and a support base. The base block is sleeved on the guide rod and can slide along the axial direction of the guide rod. The secondary adjustment component is mounted on the base block and has a movable end that can move linearly along the axial direction of the guide rod. The movable end is connected to the support base, and the support base is detachably supported at the bottom of the split block.

10. The potentiometric titrator according to claim 9, characterized in that, The secondary adjustment assembly includes a guide seat, a movable block, a threaded rod, and an adjustment knob. The guide seat is fixedly connected to the base block. The threaded rod is rotatably connected to the inner side of the guide seat and passes through the guide seat to its bottom, connecting with the adjustment knob. The movable block is threadedly connected to the threaded rod and slidably connected to the guide seat.

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