Titration head adjustment structure for a titration analyzer

Abstract

The utility model relates to analytical instrument accessory technical field especially relates to a titration head adjusting structure of titration analysis appearance, including base, the top fixed mounting of base is equipped with stand, the surface of stand is equipped with connecting block, the surface of connecting block is provided with the fixed part for making connecting block and stand fixed, the surface sliding of connecting block is equipped with slide, the end of slide is provided with the arc -shaped recess of adaptation titration head, and the position that corresponds arc -shaped recess is provided with clamping plate. The utility model through the cooperation of connecting block, slide and limiting lever, can realize the free adjustment of height, angle and horizontal position to the fixed burette, only need to rotate fixed part handle, press limiting lever to complete operation when adjusting, and the adjustment mode is simple, and the different needs of burette position in titration experiment are satisfied easily, and the operation convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of analytical instrument accessories technology, and in particular to a titration head adjustment structure for a titration analyzer. Background Technology

[0002] In titration analysis experiments, the accuracy of the burette position in the titration analyzer directly affects the accuracy of the experimental results. However, the existing burette adjustment structures of titration analyzers have obvious defects: most structures can only achieve single-dimensional adjustment (such as height or horizontal), which is difficult to meet the needs of multi-dimensional position adjustment of the burette under different experimental containers and different titration scenarios. This results in the burette not being accurately aligned with the center of the container, which easily leads to reagent spillage. Some structures that can achieve multi-dimensional adjustment require the operation of multiple sets of complex bolts, screws, buckles and other components. The adjustment requires repeated disassembly and tightening, which is cumbersome. This not only increases the difficulty of the operator's work, but also makes it difficult to quickly and accurately fix the position of the burette. After adjustment, the burette is prone to displacement due to insecure fixation. Utility Model Content

[0003] The purpose of this invention is to provide a titration head adjustment structure for a titration analyzer, which solves the problems of existing titration analyzer burette adjustment structures being unable to achieve multi-dimensional free adjustment and having complex and cumbersome adjustment operations.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A titration head adjustment structure for a titration analyzer includes a base, a column fixedly mounted on the top of the base, a connecting block sleeved on the surface of the column, a fixing element for fixing the connecting block and the column on the surface of the connecting block, a slide rod slidably passing through the surface of the connecting block, an arc-shaped groove adapted to the titration head at the end of the slide rod, and a clamping plate corresponding to the position of the arc-shaped groove for clamping the titration head in the arc-shaped groove, and a limiting component for limiting the relative position of the slide rod and the connecting block on the surface of the slide rod.

[0005] Preferably, the fixing member includes a pressing block slidably connected inside the connecting block, an end of the pressing block is rotatably connected to a lead screw, and the other end of the lead screw is threaded through the connecting block and fixedly mounted with a throttle handle.

[0006] Preferably, the side of the extrusion block facing the column is provided with an arc-shaped surface, and a rubber pad is adhered to the arc-shaped surface.

[0007] Preferably, the limiting component includes a limiting rod slidably connected to the top of the slide rod, the top of the limiting rod being evenly provided with teeth, the interior of the connecting block being provided with a matching tooth groove relative to the position of the limiting rod, and the bottom of the limiting rod and the slide rod being fixedly connected by a tower spring.

[0008] Preferably, the clamping plate is designed with an obtuse angle, and a rotating shaft is fixedly inserted through the center of the clamping plate. Both ends of the rotating shaft are fitted with torsion springs. The clamping plate is rotatably connected to the sliding rod through the rotating shaft, and both ends of the torsion springs are fixed to the clamping plate and the sliding rod, respectively.

[0009] Preferably, a silicone pad one is fixed to the surface of the clamping plate, and a silicone pad two is fixed inside the arc-shaped groove of the slide rod. The silicone pad one and the silicone pad two have the same hardness, and both have a Shore hardness of 50-70 degrees.

[0010] This utility model has at least the following beneficial effects: By using the connecting block, sliding rod, and limiting rod, the height, angle, and horizontal position of the fixed burette can be freely adjusted. The adjustment is simple and can easily meet the different requirements for the position of the burette in titration experiments, thus improving the convenience of operation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the slide bar structure of this utility model; Figure 3 This utility model Figure 3 Schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the limiting rod structure of this utility model; Figure 5 This utility model Figure 4 Schematic diagram of the structure at point B; Figure 6 This is a cross-sectional view of the connecting block of this utility model.

[0013] In the diagram: 1. Base; 2. Column; 3. Connecting block; 31. Lead screw; 32. Extrusion block; 33. Rubber pad; 34. Gear groove; 4. Slide rod; 41. Limiting rod; 42. Tower spring; 5. Clamping plate; 51. Torsion spring; 52. Rotating shaft; 53. Silicone pad one; 54. Silicone pad two; 6. Dropper head. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] Reference Figure 1-6 A titration head 6 adjustment structure for a titration analyzer includes a base 1, a column 2 fixedly mounted on the top of the base 1, a connecting block 3 sleeved on the surface of the column 2, a fixing element for fixing the connecting block 3 and the column 2 on the surface of the connecting block 3, a slide rod 4 slidably passing through the surface of the connecting block 3, an arc-shaped groove adapted to the titration head 6 at the end of the slide rod 4, and a clamping plate 5 corresponding to the position of the arc-shaped groove for clamping the titration head 6 in the arc-shaped groove, and a limiting component for limiting the relative position of the slide rod 4 and the connecting block 3 on the surface of the slide rod 4.

[0017] The bottom of the base 1 is covered with a 3-5mm thick nitrile rubber anti-slip pad. The surface of the base 1 has through holes for bolts to pass through, which can be used to fix the base 1 to the main platform of the titration analyzer. This not only increases the friction between the base 1 and the experimental table, preventing the equipment from shifting during operation, but also buffers the slight vibration of the equipment during operation. The column 2 is fixed to the base 1 by welding. The connecting block 3 has through holes that are compatible with the column 2, ensuring that the slide rod 4 moves smoothly without jamming. The radius of the arc groove is designed to be 6-9mm according to the commonly used titration head 6 specifications, and the groove depth is 8-12mm. This can stably support the titration head 6 and prevent the titration head 6 from falling off during adjustment.

[0018] Furthermore, the fixing member includes a pressing block 32 that is slidably connected inside the connecting block 3. The end of the pressing block 32 is rotatably connected to a lead screw 31, and the other end of the lead screw 31 is threaded through the connecting block 3 and fixedly mounted with a throttle handle.

[0019] The extrusion block 32 has an arc-shaped structure and is made of wear-resistant cast iron. The lead screw 31 uses a trapezoidal thread with a specification of Tr12×2 and a pitch of 2mm. This thread structure has self-locking properties, which can prevent the lead screw 31 from rotating on its own and causing the extrusion block 32 to loosen when the handle is turned without external force. A deep groove ball bearing of model 608 is installed at the rotating connection between the lead screw 31 and the extrusion block 32, which makes the lead screw 31 rotate more flexibly and reduces the operating force.

[0020] Furthermore, the side of the extrusion block 32 facing the column 2 is designed as an arc-shaped surface, and a rubber pad 33 is adhered to the arc-shaped surface.

[0021] The curvature of the arc-shaped surface of the extrusion block 32 is consistent with the curvature of the outer periphery of the column 2, ensuring full contact with the outer periphery of the column 2 during extrusion and improving the fixing effect. The rubber pad 33 is made of food-grade silicone rubber with a thickness of 2-3mm. It is bonded to the arc-shaped surface with strong acrylic adhesive, making it difficult to fall off during long-term extrusion and disassembly adjustment. The surface of the rubber pad 33 is provided with fine anti-slip protrusions, which can further increase the friction between the extrusion block 32 and the column 2, making the connecting block 3 more stable after fixing. It is not easy to shift even if subjected to slight external force. At the same time, the rubber pad 33 has good elasticity, which can prevent the extrusion block 32 from directly contacting the metal surface of the column 2 during extrusion fixing, preventing the surface of the column 2 from being scratched and protecting the appearance and structural integrity of the column 2.

[0022] Furthermore, the limiting component includes a limiting rod 41 slidably connected to the top of the slide rod 4. The top of the limiting rod 41 is evenly provided with teeth. The interior of the connecting block 3 is provided with a matching tooth groove 34 relative to the position of the limiting rod 41. The bottom of the limiting rod 41 and the slide rod 4 are fixedly connected by a tower spring 42.

[0023] The limiting rod 41 is made of polycarbonate, and the tower spring 42 is made of 65Mn spring steel with a wire diameter of 0.8-1mm, a free height of 8-10mm, and a working spring force of 5-7N. In its natural state, the spring force of the tower spring 42 can push the limiting rod 41 upward, so that the teeth and the tooth groove 34 are tightly engaged, preventing the slide rod 4 from sliding on its own. When it is necessary to adjust the position of the slide rod 4, the operator presses the limiting rod 41 downward to overcome the spring force of the tower spring 42 and make the teeth disengage from the tooth groove 34, which can then push the slide rod 4 to move. The adjustment process is convenient and efficient. The inner wall of the sliding hole of the limiting rod 41 and the slide rod 4 is polished to reduce the resistance when the limiting rod 41 slides and extend its service life.

[0024] Furthermore, the clamping plate 5 is designed with an obtuse angle, and a rotating shaft 52 is fixedly inserted through the center of the clamping plate 5. Both ends of the rotating shaft 52 are fitted with torsion springs 51. The clamping plate 5 is rotatably connected to the slide rod 4 through the rotating shaft 52, and both ends of the torsion springs 51 are fixed to the clamping plate 5 and the slide rod 4 respectively.

[0025] The clamping plate 5 is made of stainless steel and has an obtuse angle of 105°-115°. This angle range can accommodate different diameter tip heads 6 and ensure that the clamping force on the tip head 6 is moderate. The torsion spring 51 is made of carbon spring steel. In its natural state, the torsion of the torsion spring 51 can drive the clamping plate 5 to rotate in the direction of the arc groove, so as to achieve automatic clamping of the tip head 6 without the need for additional manual fixation, thus improving the operating efficiency.

[0026] Furthermore, a silicone pad 53 is fixed to the surface of the clamping plate 5, and a silicone pad 54 is fixed inside the arc-shaped groove of the slide rod 4. The silicone pad 53 and the silicone pad 54 have the same hardness, and both have a Shore hardness of 50-70 degrees.

[0027] Both silicone pad 53 and silicone pad 54 are made of medical-grade silicone, which is non-toxic, odorless, and has excellent chemical corrosion resistance. It can withstand corrosion from common acid, alkali, and salt solutions and will not react chemically with titration reagents, ensuring the accuracy of experimental results. Silicone pad 53 is attached to the side of the clamping plate 5 facing the arc-shaped groove with double-sided adhesive. Its size is consistent with the clamping surface of the clamping plate 5, and it can fully cover the clamping area. Silicone pad 54 is embedded in the arc-shaped groove, and its fit with the groove is a transition fit. It is fixed by the elasticity of the silicone itself and can fit tightly to the outer periphery of the burette head 6. The silicone with a Shore hardness of 50-70 degrees has sufficient elasticity to adapt to the shape of the burette head 6 and improve the clamping seal, while also having a certain support force to prevent the burette head 6 from deforming under gravity.

[0028] In summary, the tip head 6 to be used is placed in the arc-shaped groove at the end of the slide bar 4. At this time, under the torque of the torsion springs 51 at both ends of the rotating shaft 52, the clamping plate 5 automatically rotates towards the arc-shaped groove. The silicone pad 53 on the surface of the clamping plate 5 cooperates with the silicone pad 54 in the arc-shaped groove to stably clamp the tip head 6 inside the arc-shaped groove, ensuring that the tip head 6 is not loose or deviated.

[0029] Through the pre-drilled holes at the four corners of the base 1, bolts are used to fix the entire base 1 to the designated installation area of ​​the titration analyzer main unit, ensuring that the base 1 and the analyzer main unit are relatively stationary; then the liquid inlet of the titration head 6 is sealed and connected to the reagent delivery pipeline of the titration analyzer.

[0030] Rotate the handle in the fixing component in the reverse direction. The handle drives the lead screw 31 to rotate within the connecting block 3. Due to the threaded engagement between the lead screw 31 and the connecting block 3, the rotation of the lead screw 31 drives the end-connected extrusion block 32 to slide away from the column 2 until the rubber pad 33 on the arc-shaped surface of the extrusion block 32 completely detaches from the surface of the column 2, releasing the fixing state between the connecting block 3 and the column 2. Hold the connecting block 3 and slide it up and down along the axial direction of the column 2, while observing the position of the calibration module or experimental container of the titration analyzer. Adjust the connecting block 3 to a suitable height and angle so that the outlet of the titration head 6 maintains a preset distance from the outlet of the experimental container or the calibration reference surface. Rotate the handle clockwise. The lead screw 31 rotates in the reverse direction, pushing the extrusion block 32 towards the column 2 until the arc-shaped surface of the extrusion block 32 is tightly fitted with the outer periphery of the column 2. The rubber pad 33 is compressed and generates sufficient friction, fixing the connecting block 3 in the current position of the column 2, completing the height and angle adjustment.

[0031] Press down on the limiting rod 41 in the limiting assembly with your finger. The limiting rod 41 slides downward against the elastic force of the bottom tower spring 42, causing the teeth at the top of the limiting rod 41 to completely disengage from the corresponding grooves 34 inside the connecting block 3, thus releasing the relative restriction between the slide rod 4 and the connecting block 3. Push or pull the slide rod 4 horizontally. The slide rod 4 slides within the through hole of the connecting block 3, causing the titration head 6 at the end to move synchronously until the outlet of the titration head 6 is aligned with the center of the experimental container or the titration area specified by the analyzer. Release your finger from pressing the limiting rod 41. Under the elastic reset action of the tower spring 42, the limiting rod 41 slides upward, and the teeth at the top re-engage precisely with the grooves 34 inside the connecting block 3, fixing the slide rod 4 in the current position, thus completing the horizontal position adjustment.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A titration head adjustment structure for a titration analyzer, characterized in that, The device includes a base, a column fixedly mounted on the top of the base, a connecting block sleeved on the surface of the column, a fixing element for fixing the connecting block and the column on the surface of the connecting block, a sliding rod slidably passing through the surface of the connecting block, an arc-shaped groove adapted to a titration head at the end of the sliding rod, and a clamping plate corresponding to the position of the arc-shaped groove for clamping the titration head in the arc-shaped groove, and a limiting component for limiting the relative position of the sliding rod and the connecting block on the surface of the sliding rod.

2. The titration head adjustment structure of a titration analyzer according to claim 1, characterized in that, The fixing component includes a pressing block that is slidably connected inside the connecting block. A lead screw is rotatably connected to one end of the pressing block, and the other end of the lead screw is threaded through the connecting block and fixedly mounted with a throttle handle.

3. The titration head adjustment structure of a titration analyzer according to claim 2, characterized in that, The side of the extrusion block facing the column is designed as an arc-shaped surface, and a rubber pad is adhered to the arc-shaped surface.

4. The titration head adjustment structure of a titration analyzer according to claim 1, characterized in that, The limiting component includes a limiting rod slidably connected to the top of the slide rod. The top of the limiting rod is evenly provided with teeth. The interior of the connecting block is provided with matching tooth grooves relative to the position of the limiting rod. The bottom of the limiting rod and the slide rod are fixedly connected by a tower spring.

5. The titration head adjustment structure of a titration analyzer according to claim 1, characterized in that, The clamping plate is designed with an obtuse angle. A rotating shaft is fixedly inserted through the center of the clamping plate. Both ends of the rotating shaft are fitted with torsion springs. The clamping plate is rotatably connected to the sliding rod through the rotating shaft, and both ends of the torsion springs are fixed to the clamping plate and the sliding rod, respectively.

6. The titration head adjustment structure of a titration analyzer according to claim 1, characterized in that, A silicone pad is fixed to the surface of the clamping plate, and a silicone pad is fixed inside the arc-shaped groove of the slide rod. The silicone pads have the same hardness, and both have a Shore hardness of 50-70.

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