A multi-liquid joint titration device and its use method

Abstract

The present invention proposes a multi-liquid joint titration device and a method of using the same, comprising a plurality of liquid storage bottles, a liquid circuit system and a titration mechanism, wherein the liquid circuit system comprises a plurality of upper liquid tubes and an upper liquid control mechanism, and the titration mechanism comprises a plurality of burettes, a liquid inlet tube and a burette head, wherein the plurality of liquid storage bottles are respectively connected to one end of the corresponding upper liquid tube, and the other ends of the plurality of upper liquid tubes are respectively connected to the top of the liquid inlet tube, and the liquid inlet tube is inserted into the corresponding burette, and the liquid outlet end of the burette is inserted into the liquid inlet on the burette head, so as to complete the rapid titration operation of the plurality of liquids. The present invention realizes the rapid switching of the titration liquid, improves the titration efficiency, has good practicality and strong operability.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical analysis devices, and in particular relates to a multi-liquid combined titration device and a use method thereof. Background Art

[0002] In daily chemical analysis in the laboratory, there are often continuous titrations and back-titration operations of multiple titrants (such as continuous titration of calcium and magnesium and continuous titration and back-titration of iron and aluminum). The operation involves switching and using at least two or more burettes back and forth. At the same time, each burette needs to be cleaned separately and titrants added. The process is cumbersome and inefficient.

[0003] Therefore, a multi-liquid combined titration device has been introduced, which can not only effectively improve the efficiency of the titration operation, but also quickly clean the burette and reduce the difficulty of adding liquid, or can effectively improve the efficiency of titration, cleaning and other operations and reduce the difficulty of adding liquid, which is an important research topic for technical personnel in this field. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multi-liquid combined titration device and a use method thereof in view of the above-mentioned existing problems, so as to effectively improve the titration efficiency and reduce the difficulty of adding liquids.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a multi-liquid joint titration device, characterized in that it includes multiple liquid storage bottles, a liquid circuit system and a titration mechanism, the liquid circuit system includes multiple upper liquid tubes and an upper liquid control mechanism, the titration mechanism includes multiple burettes, a liquid inlet tube and a titration head, the multiple liquid storage bottles are respectively connected to one end of the corresponding upper liquid tube, the other ends of the multiple upper liquid tubes are respectively connected to the top of the liquid inlet tube, the liquid inlet tube is inserted into the corresponding burette, and the liquid outlet end of the burette is connected to the titration head.

[0006] According to the above scheme, the upper liquid control mechanism includes a PLC controller, an upper liquid pump and a solenoid valve. The upper liquid pump and the solenoid valve are respectively connected to the upper liquid pipe. The PLC controller is electrically connected to the upper liquid pump and the solenoid valve to control opening and closing.

[0007] According to the above scheme, the burette head includes an outer shell, a first rotary piston and a second rotary piston, a plurality of liquid inlets are arranged at intervals on the outer shell, a burette port is arranged at the center of the bottom of the outer shell, the liquid outlet end of the burette is inserted into the liquid inlet, a first passage is arranged at intervals on the first rotary piston, a second passage is arranged on the second rotary piston, and the bottom end of the second passage corresponds to the burette port.

[0008] According to the above scheme, the outer shell is a rotating body structure with an upper frustum and a lower cone, the liquid inlets are evenly spaced along the circumference of the upper frustum structure, and the droplet is located at the bottom end of the lower cone structure.

[0009] According to the above scheme, the first rotary piston is a truncated cone-shaped shell structure, which is sleeved inside the outer shell, and the outer wall surface is in contact with the inner wall of the outer shell. The top of the first rotary piston is provided with a horizontally extending annular flange along the circumferential direction, and the annular flange is overlapped with the top of the outer shell. The first passage and the liquid inlet are located at the same height.

[0010] According to the above scheme, the second rotary piston is a truncated cone block structure, a truncated cone boss is provided at the bottom center, the second rotary piston is inserted into the first rotary piston, the outer wall surface is in contact with the inner wall of the first rotary piston, the outer wall surface of the boss is in contact with the inner wall of the outer shell, the second passage is an L-shaped channel, the vertical section is located at the center of the second rotary piston, and the horizontal section is at the same height as the first passage.

[0011] According to the above scheme, the burette is an L-shaped tube, the horizontal section of the tube mouth is connected to the liquid inlet, and the outer wall of the burette is provided with a height scale line.

[0012] According to the above scheme, an elbow is provided at the bottom of the liquid inlet pipe, the elbow is located at the right-angle bend of the burette, and the top of the liquid inlet pipe is connected to the upper liquid pipe through a silicone hose.

[0013] According to the above solution, a rotating handle is provided at the center of the top surface of the second rotary piston.

[0014] A method for using a multi-liquid joint titration device, characterized in that it includes the following contents:

[0015] Under the action of the liquid supply control mechanism, the titration liquid in the liquid storage bottle is added to the burette through the liquid supply pipe and the liquid inlet pipe respectively until the required volume is reached, the liquid supply is stopped, the first rotary piston is rotated, the first passage is aligned with the corresponding liquid inlet of the burette that needs to be titrated, the second rotary piston is rotated, the second pipeline is correspondingly connected with the first pipeline, and the titration operation of the first liquid is started; after the titration is completed, the same operation is performed, pure water is injected into the burette through the liquid supply pipe, and the burette head is rinsed to prevent the titration liquids from contaminating each other; after the rinsing is completed, the first rotary piston and the second rotary piston are rotated again to connect the liquid inlet of the burette filled with the second titration liquid, and the titration operation of the second titration liquid is started; after all the titration operations are completed, all the burettes can be injected with pure water by adjusting the liquid path system to clean the burettes and the burette heads.

[0016] The invention has the beneficial effects of providing a multi-liquid joint titration device and a use method thereof, which takes a titration mechanism as the center, can flexibly control the continuous titration and back-titration operations of two or more liquids, can quickly switch to use a burette, perform experimental operations, reduce the time interval of continuous titration, and greatly improve efficiency; the design of the liquid inlet pipe inside the burette can effectively avoid the problem of manual addition of liquid too quickly and bubble blockage in the titration solution in daily experimental operations; the injection of the titration solution is controlled by the titration solution liquid feeding control mechanism, which can improve efficiency and reduce the difficulty of adding liquid; the first and second rotary pistons in the titration head and the internal passage design can realize the switching between any burettes without causing the problem of liquid contamination and leakage; the device has good practicality and strong operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of a burette according to an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of a titration head according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0023] like Figure 1As shown, a multi-liquid joint titration device includes multiple liquid storage bottles 1, a liquid circuit system and a titration mechanism, the liquid circuit system includes multiple upper liquid tubes 2 and an upper liquid control mechanism 3, the titration mechanism includes multiple burettes 4, a liquid inlet tube 5 and a titration head 6, the multiple liquid storage bottles are respectively connected to one end of the corresponding upper liquid tube, the other ends of the multiple upper liquid tubes are respectively connected to the top of the liquid inlet tube, the liquid inlet tube is inserted into the corresponding burette, and the liquid outlet end of the burette is connected to the titration head.

[0024] The liquid supply control mechanism includes a PLC controller, a liquid supply pump and a solenoid valve. The liquid supply pump and the solenoid valve are respectively connected to the liquid supply pipe. The PLC controller is electrically connected to the liquid supply pump and the solenoid valve to control the opening and closing to realize the liquid supply operation.

[0025] like Figure 3 As shown, the titration head includes an outer shell 7, a first rotary piston 8 and a second rotary piston 9. A plurality of liquid inlets 10 are arranged at intervals on the outer shell, a titration port 11 is arranged at the center of the bottom of the outer shell, the liquid outlet end of the burette is connected to the liquid inlet, a first passage 12 is arranged at intervals on the first rotary piston, a second passage 13 is arranged on the second rotary piston, and the bottom end of the second passage corresponds to the titration port.

[0026] The outer shell is a rotating body structure with an upper truncated cone shape and a lower conical shape. The liquid inlets are evenly spaced along the circumference of the upper truncated cone structure, and the titration port is located at the bottom end of the lower conical structure.

[0027] The first rotary piston is a truncated cone-shaped shell structure, which is sleeved inside the outer shell, and the outer wall surface is in contact with the inner wall of the outer shell. The top of the first rotary piston is provided with a horizontally extending annular flange 14 along the circumferential direction, and the annular flange is overlapped with the top of the outer shell. The first passage and the liquid inlet are located at the same height. When the first rotary piston needs to be rotated to switch the liquid path, the operator can manually rotate the annular flange to drive the first rotary piston to rotate and shift.

[0028] The second rotary piston is a truncated cone block structure, with a truncated cone boss at the bottom center. The second rotary piston is inserted into the first rotary piston, with the outer wall surface fitting the inner wall of the first rotary piston, and the outer wall surface of the boss fitting the inner wall of the outer shell. The second passage is an L-shaped passage, with the vertical section located at the center of the second rotary piston and the horizontal section at the same height as the first passage. A rotating handle 15 is provided at the center of the top surface of the second rotary piston. When the second rotary piston needs to be rotated to switch the fluid path, the operator can manually rotate the rotating handle to drive the second rotary piston to rotate and shift.

[0029] like Figure 2 As shown, the burette is an L-shaped tube, the horizontal section of the tube mouth is connected to the liquid inlet, and the outer wall of the burette is provided with a height scale line 16. An elbow 17 is provided at the bottom of the liquid inlet tube, and the elbow is located at the right angle bend of the burette. The top of the liquid inlet tube is connected to the upper liquid tube through a silicone hose.

[0030] The method of titration using the device includes the following contents:

[0031] Under the action of the liquid supply control mechanism, the titration liquid in the liquid storage bottle is added to the burette through the liquid supply pipe and the liquid inlet pipe respectively until the required volume is reached, the liquid supply is stopped, the first rotary piston is rotated, the first passage is aligned with the corresponding liquid inlet of the burette that needs to be titrated, the second rotary piston is rotated, the second pipeline is correspondingly connected with the first pipeline, and the titration operation of the first liquid is started; after the titration is completed, the same operation is performed, pure water is injected into the burette through the liquid supply pipe, and the burette head is rinsed to prevent the titration liquids from contaminating each other; after the rinsing is completed, the first rotary piston and the second rotary piston are rotated again to connect the liquid inlet of the burette filled with the second titration liquid, and the titration operation of the second titration liquid is started; after all the titration operations are completed, all the burettes can be injected with pure water by adjusting the liquid path system to clean the burettes and the burette heads.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-liquid joint titration device, characterized in that: It comprises a plurality of liquid storage bottles, a liquid circuit system and a titration mechanism, wherein the liquid circuit system comprises a plurality of upper liquid tubes and an upper liquid control mechanism, and the titration mechanism comprises a plurality of burettes, a liquid inlet tube and a titration head, wherein the plurality of liquid storage bottles are respectively connected to one end of the corresponding upper liquid tubes, and the other ends of the plurality of upper liquid tubes are respectively connected to the top ends of the liquid inlet tubes, and the liquid inlet tubes are inserted into the corresponding burettes, and the liquid outlet end of the burette is connected to the titration head; the titration head comprises an outer shell, a first rotary piston and a second rotary piston, a plurality of liquid inlets are arranged at intervals on the outer shell, a titration port is arranged at the bottom center of the outer shell, the liquid outlet end of the burette is inserted into the liquid inlet, a first passage is arranged at intervals on the first rotary piston, and a second passage is arranged on the second rotary piston, The bottom end of the second passage corresponds to the droplet; the first rotary piston is a truncated cone-shaped shell structure, which is sleeved inside the outer shell, and the outer wall surface is in contact with the inner wall of the outer shell. The top of the first rotary piston is provided with a horizontally extending annular flange along the circumferential direction, and the annular flange is overlapped on the top of the outer shell. The first passage and the liquid inlet are located at the same height; the second rotary piston is a truncated cone-shaped block structure, and a truncated cone-shaped boss is provided at the bottom center. The second rotary piston is inserted into the first rotary piston, and the outer wall surface is in contact with the inner wall of the first rotary piston. The outer wall surface of the boss is in contact with the inner wall of the outer shell. The second passage is an L-shaped channel, the vertical section is located at the center of the second rotary piston, and the horizontal section is located at the same height as the first passage.

2. A multi-liquid joint titration device according to claim 1, characterized in that: The liquid supply control mechanism includes a PLC controller, a liquid supply pump and a solenoid valve. The liquid supply pump and the solenoid valve are respectively connected to the liquid supply pipe. The PLC controller is electrically connected to the liquid supply pump and the solenoid valve to control opening and closing.

3. A multi-liquid joint titration device according to claim 1 or 2, characterized in that: The outer shell is a rotating body structure with an upper frustum-shaped and a lower conical shape. The liquid inlets are evenly spaced along the circumference of the upper frustum-shaped structure, and the titration port is located at the bottom end of the lower conical structure.

4. A multi-liquid joint titration device according to claim 1, characterized in that: The burette is an L-shaped tube, the horizontal section of the tube opening is connected with the liquid inlet, and the outer wall of the burette is provided with height scale lines.

5. A multi-liquid joint titration device according to claim 1 or 4, characterized in that: An elbow is provided at the bottom of the liquid inlet pipe, and the elbow is located at the right-angle bend of the burette. The top of the liquid inlet pipe is connected to the upper liquid pipe through a silicone hose.

6. A multi-liquid joint titration device according to claim 4, characterized in that: A rotating handle is provided at the center of the top surface of the second rotary piston.

7. A method for using a multi-liquid joint titration device, characterized in that: It includes the following: Under the action of the liquid supply control mechanism, the titration liquid in the liquid storage bottle is added to the burette through the liquid supply pipe and the liquid inlet pipe respectively until the required volume is reached, the liquid supply is stopped, the first rotary piston is rotated, the first passage is aligned with the corresponding liquid inlet of the burette that needs to be titrated, the second rotary piston is rotated, the second pipeline is correspondingly connected to the first pipeline, and the titration operation of the first liquid is started; After the titration is completed, perform the same operation, inject pure water into the burette through the upper liquid tube, and rinse the titration head to prevent the titrants from contaminating each other. After flushing, the first rotary piston and the second rotary piston are rotated respectively to connect the liquid inlet of the burette filled with the second titration solution, and the titration operation of the second titration solution is started; after all titration operations are completed, the liquid circuit system can be adjusted to inject pure water into all burettes to clean the burettes and titration heads.

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