CN219434420U - Portable pH meter - Google Patents

Abstract

The utility model belongs to the technical field of detection equipment, and particularly discloses a portable pH meter which comprises a detection shell and a pH detection assembly, wherein a channel, a liquid cavity and a battery cavity are arranged in the detection shell, a liquid pipe is arranged in the channel, one end of the liquid pipe is communicated with the liquid cavity, the other end of the liquid pipe is arranged outside the detection shell, a valve and a micro-electric pump are arranged on the liquid pipe, the pH detection assembly is arranged in the detection shell corresponding to the liquid cavity and is used for detecting the pH value of liquid entering the liquid cavity through the liquid pipe, and a battery is arranged in the battery cavity and is connected with the micro-electric pump and used for providing electric energy for the micro-electric pump. According to the utility model, the liquid to be measured is sucked into the liquid cavity by the power provided by the micro-electric pump, then the valve is closed, and the pH value is measured by the pH detection assembly.

Description

Portable pH meter

Technical Field

The utility model relates to the technical field of detection equipment, in particular to a portable pH meter.

Background

The pH meter is a common instrument and equipment, is mainly used for precisely measuring the pH value of a liquid medium, can also measure the potential MV value of an ion electrode by being matched with a corresponding ion selective electrode, and is widely applied to the fields of industry, agriculture, scientific research, environmental protection and the like. The instrument is also a necessary inspection device in QS and HACCP certification of food factories and drinking water factories. Some pH meters are large in size and not easy to carry, the connection and installation structure between the pH measuring probe and the pH meter body is complex, and the occupied size is large.

In the prior art, chinese patent CN206892017U is a portable ph meter, including ph meter body and measuring electrode, ph meter body's inside is provided with the power and is connected with the power the circuit board, ph meter body's front is provided with control button and the display screen of being connected with the circuit board, the back is provided with the first recess and a plurality of elastic bulge of holding measuring electrode, ph meter body's edge is provided with the bordures, measuring electrode's one end and ph meter body's rotatable connection of tip, rotate measuring electrode, can make measuring electrode fold and set up in first recess for ph meter body, measuring electrode's outside is provided with elasticity knot, ph meter body's edge is provided with the concave part of being connected with elasticity knot buckle, ph meter body's edge still is provided with first mounting hole, set up the connector link in the first mounting hole. The portable ph meter has the advantages of being capable of being folded, having an anti-falling function and the like.

In the above-mentioned publication, although portability of the pH meter is achieved, it is necessary to extend the measuring electrode into the liquid to be measured for measurement, which is inconvenient to operate.

Disclosure of Invention

The utility model aims to provide a portable pH meter, which can suck liquid to be measured into the pH meter, and is more convenient to operate while realizing a portable function.

In order to achieve the above purpose, the utility model provides a portable pH meter, which adopts the following technical scheme:

the utility model provides a portable pH meter, includes detects casing and pH detection component, set up passageway, liquid chamber and battery chamber in the detection casing, be provided with the liquid pipe in the passageway, the one end of liquid pipe with liquid chamber intercommunication, its other end sets up detect the casing outside, be provided with valve and micro-charge pump on the liquid pipe, pH detection component corresponds the liquid chamber sets up in the detection casing for detect the pH value that enters into the liquid in the liquid chamber through the liquid pipe, the battery intracavity is provided with the battery, the battery is connected micro-charge pump is used for micro-charge pump provides the electric energy.

Preferably, the pH detection assembly comprises an indicating electrode and a reference electrode, wherein one ends of the indicating electrode and the reference electrode are both arranged in the liquid cavity, the indicating electrode and the reference electrode are both connected with a potentiometer through wires, the indicating electrode, the reference electrode and the potentiometer are all arranged in the detection shell, and a transparent window is arranged on the detection shell corresponding to the position of the potentiometer.

Preferably, the pH detection assembly comprises an indicating electrode and a reference electrode, wherein one ends of the indicating electrode and the reference electrode are both arranged in the liquid cavity, the indicating electrode and the reference electrode are both connected with a potential sensor through wires, a signal output end of the potential sensor is connected with a signal input end of a controller, a signal output end of the controller is connected with a signal input end of a display, the display is arranged on the front surface of the detection shell, and the battery is connected with the potential sensor, the controller and the display and is used for providing electric energy for the potential sensor, the controller and the display.

Preferably, the switch of the micro-electric pump is arranged on the front surface of the detection shell and comprises a forward rotation switch and a reverse rotation switch.

Preferably, the switch of the valve is disposed on the front surface of the detection housing.

Preferably, a temperature sensor is arranged in the liquid cavity, and a signal output end of the temperature sensor is connected with a signal input end of the controller.

Preferably, an electric heating assembly is arranged in the liquid cavity, and a signal output end of the controller is connected with a signal input end of the electric heating assembly.

Preferably, the indicator electrode is one of a glass electrode, an antimony electrode, a fluorine electrode and a silver electrode.

Preferably, the reference electrode is a calomel electrode.

The beneficial effects of the utility model are as follows: according to the portable pH meter, the liquid to be measured is sucked into the liquid cavity by the power provided by the micro-electric pump, the valve is closed, and the pH value is measured by the pH detection assembly.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 shows a cross-sectional view of a portable pH meter according to an embodiment of the utility model.

Fig. 2 shows a front view of a portable pH meter according to an embodiment of the utility model.

Fig. 3 shows a left side view of a portable pH meter according to an embodiment of the utility model.

Fig. 4 shows a cross-sectional view of another pH sensing assembly design of a portable pH meter according to an embodiment of the utility model.

Fig. 5 shows a front view of another pH sensing assembly design of a portable pH meter according to an embodiment of the utility model.

Fig. 6 shows a control schematic block diagram of another pH detection assembly structure of a portable pH meter according to an embodiment of the utility model.

Fig. 7 shows a cross-sectional view of a portable pH meter when provided with a temperature sensor and an electrical heating assembly, according to an embodiment of the utility model.

Fig. 8 shows a schematic diagram of the connection of electronic components of a portable pH meter when provided with a temperature sensor and an electrical heating assembly, according to an embodiment of the utility model.

In the figure, 1 is a detection shell, 2 is a pH detection component, 201 is an indication electrode, 202 is a reference electrode, 203 is a lead, 204 is a potentiometer, 205 is a potential sensor, 206 is a controller, 207 is a display, 3 is a channel, 4 is a liquid cavity, 5 is a battery cavity, 6 is a liquid pipe, 7 is a valve, 8 is a micro-electric pump, 9 is a forward rotation switch, 10 is a reverse rotation switch, 11 is a switch of the valve, 12 is a charging port, 13 is a transparent window, 14 is a temperature sensor, and 15 is an electric heating component.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples.

The embodiment of the utility model provides a portable pH meter, as shown in fig. 1, the portable pH meter comprises a detection shell 1 and a pH detection assembly 2, wherein a channel 3, a liquid cavity 4 and a battery cavity 5 are arranged in the detection shell 1, a liquid pipe 6 is arranged in the channel 3, one end of the liquid pipe 6 is communicated with the liquid cavity 4, the other end of the liquid pipe is arranged outside the detection shell 1, a valve 7 and a micro-electric pump 8 are arranged on the liquid pipe 6, the pH detection assembly 2 is arranged in the detection shell 1 corresponding to the liquid cavity 4 and used for detecting the pH value of liquid entering the liquid cavity 4 through the liquid pipe 6, a battery 16 is arranged in the battery cavity 5, and the battery 16 is connected with the micro-electric pump 8 and used for providing electric energy for the micro-electric pump 8.

In specific use, the overall structure is compact, the overall size can be designed to be relatively small, and the length of the detection housing 1 can be 10-30cm and the width can be 5-10cm by way of example only, so that the portable function can be realized by holding the detection housing 1 by hand. The utility model realizes the portable function, and simultaneously does not need to put the pH detection assembly 2 in the detection liquid for a long time during measurement, thereby being very convenient for users to operate.

Specifically, in operation, valve 7 and micro-pump 8 are opened, the detection liquid is sucked into liquid chamber 4 through liquid pipe 6, valve 7 and micro-pump 8 are closed, and pH detection assembly 2 detects the detection liquid in liquid chamber 4 to obtain the pH value. After the detection is finished, the valve 7 is opened to enable the detection liquid to flow out from the liquid cavity 4 through the liquid pipe 6 by self-gravity.

It will be appreciated that the micro-electric pump 8 may be a pump capable of implementing forward rotation and reverse rotation, for example, may be a servo-electric pump, and as shown in fig. 2, the switch of the micro-electric pump is disposed on the front surface of the detection housing, and includes a forward rotation switch 9 and a reverse rotation switch 10. By way of example only, when liquid feed is required, the forward switch 9 is turned on, and the micro-electric pump 8 is rotated forward at this time, and the detection liquid outside the detection housing 1 is sucked into the liquid chamber 4 through the liquid pipe 6; when liquid is needed to be discharged, the reversing switch 10 is turned on, and at the moment, the micro-electric pump 8 rotates positively, and the detection liquid in the liquid cavity 4 is sucked out of the detection shell 1 through the liquid pipe 6.

In some embodiments, as shown in fig. 2, the switch 11 of the valve is disposed on the front of the detection housing.

It should be noted that, the battery 16 is preferably a rechargeable battery, and as shown in fig. 3, a charging port 12 may be provided on a side wall of the detection housing 1 corresponding to the position of the battery cavity 5 to supplement energy of the battery 16.

The specific structure of the pH detecting assembly 2 will be described in detail in the present embodiment.

In some embodiments, as shown in fig. 1, the pH detection assembly 2 includes an indicating electrode 201 and a reference electrode 202, one ends of the indicating electrode 201 and the reference electrode 202 are both disposed in the liquid chamber 4, the indicating electrode 201 and the reference electrode 202 are both connected to a potentiometer 204 through a wire 203, the indicating electrode 201, the reference electrode 202 and the potentiometer 204 are all disposed in the detection housing 1, as shown in fig. 2, and a transparent window 13 is disposed on the detection housing 1 corresponding to the position of the potentiometer 204.

The specific working principle of the pH detection assembly 2 is as follows: when a hydrogen ion reversible indicator electrode 201 and a reference electrode 202 are immersed in a solution to form a primary cell, the potential of the reference electrode 202 is unchanged, and it is known that an electromotive force is generated at a certain temperature, the electromotive force is related to the activity of the hydrogen ion of the solution, and has a small relationship with other ions, the potential change is measured by a potentiometer 204 based on the basic principle, and the pH value is obtained. When the concentration (activity) of hydrogen ions in the solution, i.e., the pH value of the solution, changes, the potential generated between the indicator electrode 201 and the reference electrode 202 also changes, and the potential change relationship conforms to the following formula:

△E＝－58.16×△pH×(273+t℃)/293(mV)

Δe: the change in potential is expressed in millivolts. (mV)

Delta pH: indicating a change in the pH of the solution.

t: the temperature (. Degree. C.) of the measured solution is shown.

Therefore, at a certain temperature, the pH value can be obtained through the change of the potentiometer 204 (for example, when the solution temperature is 25 ℃, the electrode potential is changed by 59.16mV every 1 pH change), i.e. the pointer of the potentiometer displays the display correspondingly adjusted to the pH value, and the user can directly read the pH value of the current detection liquid through the transparent window 13 by modifying the scale of the potentiometer 204.

In some embodiments, as shown in fig. 4-6, the pH detection assembly 2 includes an indicating electrode 201 and a reference electrode 202, where one ends of the indicating electrode 201 and the reference electrode 202 are both disposed in the liquid chamber 4, the indicating electrode 201 and the reference electrode 202 are both connected to a potential sensor 205 through a wire 203, a signal output end of the potential sensor 205 is connected to a signal input end of a controller 206, a signal output end of the controller 206 is connected to a signal input end of a display 207, the display 207 is disposed on a front surface of the detection housing 1, and the battery 16 is connected to the potential sensor 205, the controller 206 and the display 207, so as to provide electric energy for the potential sensor 205, the controller 206 and the display 207.

The above-mentioned pH detection assembly is basically identical to the detection principle of the pH detection assembly designed in the prior art, and the difference is that the pH detection assembly of the present embodiment implements calculation of the pH value based on electronic components (potential sensor, controller, etc.), which has relatively high cost, but also has higher accuracy. Specifically, the potential signal detected by the potential sensor 205 is converted into a pH value by the controller 206, and is displayed in real time by the display 207.

In some embodiments, in order to further improve the accuracy of pH detection, as shown in fig. 7 and 8, a temperature sensor 14 is disposed in the liquid chamber 4, a signal output end of the temperature sensor 14 is connected to a signal input end of the controller 206, and the temperature sensor 15 is used for detecting the temperature of the liquid in the liquid chamber 4 and feeding the detected liquid to the controller 206, and the controller 206 can calculate the pH of the solution more accurately based on the temperature signal and the potential signal.

It should be noted that the method of calculating the pH of the solution by the controller 206 based on the temperature signal and the potential signal is prior art, including but not limited to, as described above, based on the equation Δe= -58.16 × Δph× (273+t ℃)/293 (mV). The utility model only improves the connection relation of the components of the pH meter, and does not improve the specific calculation method of the pH value.

In some embodiments, as shown in fig. 7 and 8, the electric heating assembly 15 is disposed in the liquid chamber 4, and a signal output end of the controller 206 is connected to a signal input end of the electric heating assembly 15. The electric heating assembly 15 is used for heating the detection liquid in the liquid cavity 4, so that the detection liquid is maintained within a proper temperature threshold, accurate measurement of the pH value is ensured, and through experimental tests, the accurate measurement of the pH value can be ensured when the common temperature is above 20 ℃. Thus, when the temperature sensor 14 detects that the temperature of the liquid is lower than 20 ℃, the controller 206 can control the electric heating assembly 15 to operate until the temperature signal value detected by the temperature sensor 14 exceeds 20 ℃.

It should be noted that, the electrothermal assembly 15 may be implemented as an existing electrothermal assembly such as a resistance wire or an electromagnetic coil, and the specific structure of the electrothermal assembly 15 is not limited in this embodiment.

In some embodiments, the indicator electrode 201 is one of a glass electrode, an antimony electrode, a fluorine electrode and a silver electrode, which are all sensitive to hydrogen ions, and are excellent choices of indicator electrodes.

In some embodiments, the reference electrode 202 is a calomel electrode whose potential does not change with the concentration of hydrogen ions in the liquid being measured.

The above embodiments are only for illustrating the present utility model, not for limiting the present utility model, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present utility model, and therefore, all equivalent technical solutions are also within the scope of the present utility model, and the scope of the present utility model is defined by the claims.

Claims (9)

1. The utility model provides a portable pH meter, its characterized in that, including detecting casing and pH detection component, set up passageway, liquid chamber and battery chamber in the detection casing, be provided with the liquid pipe in the passageway, the one end of liquid pipe with liquid chamber intercommunication, its other end sets up detect the casing outside, be provided with valve and micro-pump on the liquid pipe, pH detection component corresponds the liquid chamber sets up in the detection casing for detect the pH value that enters into the liquid in the liquid chamber through the liquid pipe, the battery intracavity is provided with the battery, the battery is connected micro-pump is used for micro-pump provides the electric energy.

2. The portable pH meter of claim 1, wherein the pH detection assembly comprises an indicator electrode and a reference electrode, wherein one ends of the indicator electrode and the reference electrode are disposed in the liquid chamber, the indicator electrode and the reference electrode are connected to a potentiometer through wires, the indicator electrode, the reference electrode and the potentiometer are disposed in the detection housing, and a transparent window is disposed on the detection housing corresponding to the potentiometer.

3. The portable pH meter of claim 1, wherein the pH detection assembly comprises an indicator electrode and a reference electrode, wherein one end of the indicator electrode and one end of the reference electrode are both disposed in the liquid chamber, the indicator electrode and the reference electrode are both connected to a potential sensor through wires, a signal output end of the potential sensor is connected to a signal input end of a controller, a signal output end of the controller is connected to a signal input end of a display, the display is disposed on a front surface of the detection housing, and the battery is connected to the potential sensor, the controller and the display for providing electric power to the potential sensor, the controller and the display.

4. The portable pH meter of claim 1, wherein the switch of said micro-electric pump is disposed on the front side of said detection housing, comprising a forward rotation switch and a reverse rotation switch.

5. The portable pH meter of claim 1, wherein a switch of said valve is disposed on a front face of said detection housing.

6. A portable pH meter according to claim 3, wherein a temperature sensor is provided in said liquid chamber, and a signal output of said temperature sensor is connected to a signal input of said controller.

7. The portable pH meter of claim 6, wherein an electrical heating assembly is disposed within said liquid chamber, and wherein a signal output of said controller is connected to a signal input of said electrical heating assembly.

8. A portable pH meter according to claim 2 or 3, wherein said indicator electrode is one of a glass electrode, an antimony electrode, a fluorine electrode and a silver electrode.

9. The portable pH meter of claim 2 or 3, wherein said reference electrode is a calomel electrode.