CN-122016966-A - PH value adjustment detector and adjustment detection method

CN122016966ACN 122016966 ACN122016966 ACN 122016966ACN-122016966-A

Abstract

The invention discloses a PH value adjusting detector and an adjusting detection method, which belong to the technical field of water sample detection equipment and comprise a box body, wherein a mounting seat is fixed at one end of the box body through bolts, an adjusting frame is rotatably connected to the surface of the mounting seat, a control terminal is fixed on the surface of the adjusting frame through bolts, an electrode box is arranged at the other end of the box body, an electrode assembly for storing a plurality of groups of electrodes is arranged in an inner cavity of the electrode box and is connected with the control terminal through a signal wire, a box door is connected to the surface of the box body in a sliding manner, an injection pump array module is arranged in the inner cavity of the box body, the injection pump array module comprises a module bracket, the module bracket is fixed in the inner cavity of the box door through bolts, a plurality of groups of metering and liquid adding assemblies for liquid adding are distributed on the surface array of the module bracket, and the situation that a plurality of sets of equipment or complex multi-way valves are required to be switched in a multi-container scene is avoided through the scheme, so that the detection equipment can be used in a plurality of containers at the same time, the occupied space is reduced, and the wiring and maintenance burden is reduced.

Inventors

WANG YAN
SU HAORAN
SONG PANPAN
TONG YONGHUI

Assignees

瓴川智能科技(山东)有限公司

Dates

Publication Date: 20260512
Application Date: 20260204

Claims (10)

1. A PH adjustment detector, comprising: the electrode box comprises a box body, an electrode box and an electrode assembly for storing a plurality of groups of electrodes; One end of the box body is connected with a mounting seat, the surface of the mounting seat is rotationally connected with an adjusting frame with adjustable angle and length, and the surface of the adjusting frame is connected with a control terminal; The electrode box is positioned at the other end of the box body, the inner cavity of the electrode box is connected with the electrode assembly, and the electrode assembly is connected with the control terminal through a signal wire; The surface of the box body is connected with a box door in a sliding manner, the surface of the box door is connected with a U-shaped push rod, and an injection pump array module is arranged in the inner cavity of the box body; The injection pump array module comprises a module support, the module support is connected to the inner cavity of the box door, and a plurality of metering and liquid adding assemblies for adding liquid are distributed on the surface array of the module support.
2. The PH value adjustment detector according to claim 1, wherein the metering and liquid adding component comprises a mounting opening formed in the surface of the module support and a mounting frame positioned in the inner cavity of the mounting opening, the surface of the mounting frame is in sliding connection with the inner cavity of the mounting opening, the mounting frame is connected to the surface of the module support, the surface of the mounting frame is connected with a syringe pump main body, and a liquid outlet of the syringe pump main body is communicated with a one-way valve; The top of the module support is connected with a support I, the surface of the support I is connected with a circuit board I for controlling the injection pump to carry out liquid feeding, the bottom of the module support is connected with a support II, and the top of the support II is connected with a circuit board II for being connected with a control terminal.
3. The PH value adjustment detecting instrument according to claim 1, wherein the adjusting frame comprises a connecting rod connected to the surface of the mounting seat, the other end of the connecting rod is rotatably connected with an extension plate, the other end of the extension plate is connected with a connecting column, the other end of the connecting column is provided with a supporting frame, an inner cavity of the supporting frame is rotatably connected with the surface of the connecting column, the other end of the supporting frame is rotatably connected with a movable frame, the inner cavity of the movable frame is rotatably connected with a connecting seat, and the surface of the connecting seat is connected with the surface of the control terminal.
4. The PH value adjustment detector according to claim 1, wherein the electrode assembly comprises a positioning bracket connected to the inner cavity of the electrode box, the positioning bracket is in a ring shape, a plurality of groups of fixing structures for fixing electrodes are arranged on the surface of the positioning bracket, the inner cavity of the fixing structure is connected with the PH electrode, and the top end of the PH electrode is connected with the second circuit board through a signal wire.
5. The PH value adjustment detecting instrument according to claim 4, wherein the fixing structure comprises a mounting opening formed in the surface of the positioning bracket and a mounting plate arranged above the mounting opening, a lock nut is integrally formed on the surface of the mounting plate, an inner cavity of the lock nut is in threaded connection with the surface of the PH electrode, one end of the mounting plate is connected with a fixing plate, the other end of the fixing plate is provided with a fixing pipe, the fixing pipe is connected to the surface of the positioning bracket, and the inner cavity of the fixing pipe is in fit and clamping connection with the surface of the fixing plate.
6. The PH value adjustment detector according to claim 5, wherein the top end of the positioning support is connected with a supporting plate, a plurality of groups of arc-shaped grooves for supporting the signal wires are formed on the surface of the supporting plate, a plurality of groups of positioning pipes are integrally formed at the bottom end of the positioning support, and the inner cavities of the positioning pipes are movably connected with the bottom end of the PH electrode.
7. A method of adjustment detection for a PH adjustment detector according to any one of claims 1 to 6, comprising: S1, respectively immersing a plurality of PH electrodes in an electrode assembly into a solution container to be detected, and simultaneously placing connecting pipes of a metering and liquid adding assembly in an injection pump array module into corresponding containers; S2, collecting PH value signals of the solutions in the containers through the electrode assemblies, and transmitting the PH value signals to the control terminal; s3, carrying out filtering processing, temperature compensation and analog-to-digital conversion on the PH value signal based on the control terminal to obtain stable and accurate PH value data, wherein the temperature compensation is calculated by adopting a Nernst equation: Wherein E is a measured potential, E 0 is a standard potential, R is a gas constant, T is absolute temperature, and F is a Faraday constant; s4, comparing the PH value data with a preset target PH value range, and calculating the amount of the acid-base solution to be added when the PH value data exceeds the preset target PH value range, wherein the calculation formula is as follows: Wherein V add is the amount of solution to be added, and K p and K i are the proportional and integral coefficients, respectively; And S5, controlling the metering and liquid adding assembly to inject acid liquid or alkali liquid into the corresponding container according to the amount of the acid and alkali liquid required to be added, finishing the pH value adjustment, and circularly executing S2-S5 until the pH value data is stabilized within a preset target pH value range.
8. The method for detecting adjustment according to claim 7, wherein the filtering in step S3 is a combination of median filtering and exponential sliding averaging, and is specifically as follows: Wherein y k is the current output value, x k is the current input value, y k-1 is the output value at the last moment, alpha is a smoothing coefficient, and the value range is 0.1-0.3.
9. The method according to claim 7, wherein the step S5 is performed by monitoring the rate of pH change during the liquid feeding in real time, determining an abnormal state and terminating the liquid feeding when the following conditions are satisfied: wherein, the pH t is the pH value at the time t, In order to provide for the time interval of time, For the rate of change threshold, V cumulative is the cumulative addition amount and V threshold is the preset maximum addition threshold.
10. The method for detecting adjustment according to claim 7, further comprising allocating processing resources of the control terminal by using a time slice round robin scheduling algorithm when simultaneously processing the adjustment of the pH values of the plurality of containers, wherein the processing time slice length of each container is proportional to the degree to which the pH value of each container deviates from the target value, and the calculation formula is: Where T i is the time slice allocated for the ith container, T base is the base time slice length, beta is the adjustment factor, and pH max and pH min are the upper and lower limits, respectively, of the measurable pH range.

Description

PH value adjustment detector and adjustment detection method Technical Field The invention relates to the technical field of water sample detection equipment, in particular to a PH value adjusting detector and an adjusting detection method. Background In laboratory analysis, process development, solution configuration, biochemical reaction control and other applications, the pH value of the solution is a core process parameter, and in the scene of parallel, batch preparation or high-throughput development of multiple samples, pH monitoring and adjustment are often required to be carried out on multiple solutions at the same time, the traditional manual monitoring and adjustment mode relies on portable pH meter measurement, manual acid and alkali addition by a buret or a pump, the labor intensity is high, the result is greatly influenced by the experience of an operator, and adjustment data cannot be completely traced. Along with the development of automation, a single-channel pH control terminal or a titrator appears, the pH value of a solution is monitored in real time through a pH electrode, a metering pump is controlled to add acid or alkali according to a certain metering, the device can realize closed-loop control on a single container, when multiple solutions need to be processed simultaneously, a common scheme is that each container is provided with a set of control terminal or titrator, or one set of pump or one set of electrode is used for serving multiple containers through complex multi-way valve switching, so that multiple sets of equipment or complex multi-way valve switching is needed in a multi-container scene, and the occupied area, wiring and maintenance burden are increased. Disclosure of Invention The invention aims to provide a PH value adjustment detector and an adjustment detection method, which can realize the acid addition and alkali addition of a plurality of groups of containers and the PH value monitoring of the plurality of groups of containers through the matching of an injection pump array module and an electrode assembly, can avoid a plurality of sets of single machine schemes, simplify wiring operation, reduce occupied space, can directly open a box body through the matching of a box door and the box body, and can be matched with the disassembly of a metering and liquid adding assembly on a module bracket, thereby reducing overhaul complexity and solving the problems in the prior art. The PH value adjusting detector comprises a box body, wherein an installation seat is fixed at one end of the box body through bolts, an adjusting frame capable of adjusting angles and lengths is rotatably connected to the surface of the installation seat, a control terminal is fixed to the surface of the adjusting frame through bolts, an electrode box is arranged at the other end of the box body, an electrode assembly used for storing a plurality of groups of electrodes is arranged in an inner cavity of the electrode box, the electrode assembly is connected with the control terminal through a signal wire, a box door is connected to the surface of the box body in a sliding mode, a U-shaped push rod is fixed to the surface of the box door through bolts, an injection pump array module is arranged in the inner cavity of the box body, the injection pump array module comprises a module support, the module support is fixed to the inner cavity of the box door through bolts, and a plurality of groups of metering and liquid adding assemblies used for adding liquid are distributed on the surface array of the module support. Preferably, the metering liquid adding assembly comprises a mounting opening formed in the surface of the module support and a mounting frame located in the inner cavity of the mounting opening, the surface of the mounting frame is slidably connected with the inner cavity of the mounting opening, a mounting frame is fixed on the surface of the module support through bolts, a syringe pump main body is fixed on the surface of the mounting frame through bolts, a liquid outlet of the syringe pump main body is communicated with a one-way valve, and a liquid feeding opening of the one-way valve is communicated with a connecting pipe. Preferably, a first bracket is fixed on the top end of the module bracket through bolts, a first circuit board for controlling the injection pump to perform liquid feeding is fixed on the surface of the first bracket through bolts, a second bracket is fixed on the bottom end of the module bracket through bolts, and a second circuit board for being connected with a control terminal is fixed on the top end of the second bracket through bolts. Preferably, the regulating frame comprises a connecting rod, connecting rod welded fastening is on the surface of mount pad, the other end of connecting rod rotates and is connected with the extension board, the other end welded fastening of extension board has the spliced pole, the other end of spliced pole is provided with