CN211627442U

CN211627442U - PH value detection probe

Info

Publication number: CN211627442U
Application number: CN202020226451.8U
Authority: CN
Inventors: 刘佳; 李诗; 刘涛
Original assignee: Guiyang Maternal And Child Health Hospital Guiyang Children's Hospital
Current assignee: Guiyang Maternal And Child Health Hospital Guiyang Children's Hospital
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-10-02
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses a pH value detection probe, which comprises a probe body and a joint, wherein the probe body comprises a tubular shell with an open end, an electrode bulb is arranged at the open end of the tubular shell, an external reference solution is filled in the electrode bulb, and an internal reference solution is filled in the probe body; the probe body further comprises an inner reference electrode and an outer reference electrode which are arranged in parallel, the inner reference electrode extends into the inner reference solution, and the outer reference electrode extends into the outer reference solution; the connector comprises a connector body, and a first conductive part and a second conductive part which are arranged on the connector body, wherein the first conductive part is electrically connected with the outer reference electrode and is in a cylindrical shape, and a clamping part is arranged on the side wall of the cylindrical first conductive part; the second conductive portion is electrically connected to the inner reference electrode, and the second conductive portion is also configured in a cylindrical shape and disposed inside the outer reference electrode.

Description

PH value detection probe

Technical Field

The utility model relates to a detecting instrument, especially a pH test probe for detecting solution pH value, this pH value test probe low limbs rehabilitation training device.

Background

The hydrogen ion concentration index (hydrogen ion concentration) in a solution is generally referred to as "pH". There are many methods for determining the pH of a solution, such as: a pH indicator is used. And adding a pH indicator into the solution to be detected, wherein different indicators can change colors according to different pH values, and the pH range can be determined according to the research of the indicators. When the dripping is performed, an accurate pH standard can be made; for another example, pH paper is used. The pH test paper comprises wide test paper and precise test paper, a glass rod is dipped in a solution to be tested to the test paper, and then the pH value of the solution can be obtained by contrasting a standard colorimetric card according to the color change of the test paper; in other more accurate measurement environments, an electronic pH meter may be used. The pH meter is an instrument for measuring the pH value of a solution, and measures the pH value of the solution through a pH selective electrode (such as a glass electrode), and can be accurate to two decimal places.

At present, a common electronic PH detection electrode is generally provided with an outer reference electrode and an inner reference electrode, wherein the inner reference electrode is generally a saturated calomel electrode, the outer reference electrode is generally a glass electrode, the end of the glass electrode is configured as a glass bulb, and an outer reference solution is filled in the glass bulb. When the measurement is carried out, ion exchange occurs on the phase interface between the outer side of the membrane of the glass bulb and the PH solution to be measured, and H exists⁺Entering and exiting; similarly, ion exchange also occurs at the phase interface between the inner side of the glass bulb and the HCl solution of 0.1mol/L filled in the glass bulb, and H also exists⁺And (4) entering and exiting. Because H in the solution on two sides of the membrane of the glass bulb⁺The difference in concentration, and the influence of ion diffusion in the film hydrogel layer of the glass bulb, gradually establishes a relatively stable potential difference between the two phase interfaces, namely the film potential, at the outer side of the film and the inner side of the film. Because the HCl solution on the inner side of the membrane is a fixed value, when the ion diffusion condition in the glass membrane is stable, the influence of the HCl solution on the membrane potential is also a fixed value, so that the membrane potential only depends on H in the pH solution to be measured on the outer side of the membrane⁺And (4) concentration. By connection to the electrodesThe pH meter body can obtain the pH value of the solution to be measured by measuring the membrane potential. However, the current pH meter with such a structure has a troublesome measurement mode of separately arranging the inner reference electrode and the outer reference electrode, and is inconvenient to maintain, and if the pH meter is not maintained properly, the subsequent measurement data may be inaccurate. Therefore, at present, manufacturers successfully develop a pH meter composite electrode, the composite electrode combines an inner reference electrode and an outer reference electrode together, a film of a glass bulb is effectively protected, and the composite electrode is not easy to damage and convenient to use. However, the pH composite electrode must be soaked before use, because the glass bulb of the pH composite electrode is a special glass film, a very thin hydrated gel layer is arranged on the surface of the glass film, and the glass bulb can have good response with H + ions in a solution only under the condition of sufficient humidity. Meanwhile, the glass electrode is soaked, so that the asymmetric potential is greatly reduced and tends to be stable. The pH glass electrode may be typically soaked with distilled water or a pH buffer solution. It is generally better to use a pH buffer solution, and the soaking time is 8 hours to 24 hours or more, which varies according to the thickness of the glass film of the bulb and the aging degree of the electrode, and meanwhile, the liquid junction of the reference electrode also needs to be soaked. At this moment, in order to facilitate the operation, the pH detection probe is generally designed to be detached from the pH meter for independent soaking, so as to avoid the overall transportation of the equipment.

Disclosure of Invention

In view of the above problems existing in the prior art, an object of the present invention is to provide a pH detecting probe which is easy to insert and pull out and stable in connection.

In order to achieve the above object, an embodiment of the present invention provides a pH detection probe, which includes a probe body and a connector connected to the probe body through a wire, wherein the probe body includes a tubular housing with an open end, an electrode bulb is disposed at the open end of the tubular housing, an external reference solution is filled in the electrode bulb, and an internal reference solution is filled in the probe body; the probe body further comprises an inner reference electrode and an outer reference electrode which are arranged in parallel, the inner reference electrode extends into the inner reference solution, and the outer reference electrode extends into the outer reference solution; the connector comprises a connector body, and a first conductive part and a second conductive part which are arranged on the connector body, wherein the first conductive part is electrically connected with the outer reference electrode and is in a cylindrical shape, and a clamping part is arranged on the side wall of the cylindrical first conductive part; the second conductive portion is electrically connected to the inner reference electrode, and the second conductive portion is also configured in a cylindrical shape and disposed inside the outer reference electrode.

Preferably, the clamping portion is an L-shaped opening.

Preferably, the outer edge of the joint body is provided with anti-slip lines.

Preferably, the opening end of the probe body is provided with a plurality of openings at intervals for exposing the electrode bulbs.

Compared with the prior art, the utility model provides a pH value test probe accessible quick connector is dismantled at any time and is soaked the operation, need not to take pH value to detect an organic whole of meter host computer and move. And to traditional bayonet joint, the utility model discloses a pH value test probe also can play easily pegging graft and connect stable effect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the pH value detecting probe of the present invention.

Fig. 2 is a front view of the pH detecting probe of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line a-a in fig. 2.

The main reference numbers:

1 … probe body; 2 … a wire; 3 … linker; 4 … electrode bulb; 5 … external reference electrode; 6 … internal reference electrode; 7 … reference solution; 11 … opening; 31 … a fitting body; 32 … a first conductive portion; 321 … "L" shaped opening; 33 … a second conductive portion; 41 … external reference solution.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure.

It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

As shown in fig. 1 to 3, the pH value detecting probe provided in the embodiment of the present invention includes a probe body 1 and a connector 3 connected to the probe body 1 through a wire 2, where the probe body 1 includes a tubular housing (not labeled in the figures) with an open end, an electrode bulb 4 is disposed at the open end of the tubular housing, an external reference solution 41 is filled in the electrode bulb 4, generally, the external reference solution may be a conventional external reference solution, i.e., 3.3mol/L potassium chloride gel electrolyte, an internal reference solution 7 is filled in the probe body 1, and similarly, the internal reference solution may also be a conventional internal reference solution, e.g., a mixture of neutral phosphate and potassium chloride; the probe body 1 further comprises an inner reference electrode 6 and an outer reference electrode 5 which are arranged in parallel, wherein the inner reference electrode 6 extends into the inner reference solution 7, and the outer reference electrode 5 extends into the outer reference solution 41; the contact 3 comprises a contact body 31, and a first conductive part 32 and a second conductive part 33 which are arranged on the contact body 31, wherein the first conductive part 32 is electrically connected with the outer reference electrode 5 and is configured to be cylindrical, and a clamping part is arranged on the side wall of the cylindrical first conductive part 32; the second conductive portion 33 is electrically connected to the inner reference electrode 6, and the second conductive portion 33 is also configured in a cylindrical shape and is disposed in the outer reference electrode 5. The joint 3 constructed in this way can ensure that the pH value detection probe can be quickly detached when the pH value measurement is carried out and the pH value detection probe is soaked if necessary, and can also be quickly connected with a pH meter (not shown in the figure) after the soaking is finished.

The effect of joint portion lies in promoting the stability of being connected of joint 3 with the pH meter to realize more accurate membrane potential measurement, consequently, when realizing quick dismantlement, need consider simultaneously connection stability. In some embodiments, as shown in fig. 1, the clamping portion is preferably an "L" shaped opening.

In addition, for convenience of operation, as shown in fig. 1, the outer edge of the joint body 31 is preferably provided with anti-slip threads (not shown).

Furthermore, the electrode bulb, which is the end that contacts the solution to be measured, needs to be sufficiently contacted with the solution to be measured to form a film interface, and therefore, preferably, a plurality of openings 11 that expose the electrode bulb 4 are provided at intervals at the opening end of the probe body 1.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims

The pH value detection probe comprises a probe body and a connector connected with the probe body through a lead, wherein the probe body comprises a tubular shell with one open end, an electrode bulb is arranged at the open end of the tubular shell, an external reference solution is filled in the electrode bulb, and an internal reference solution is filled in the probe body; the probe body further comprises an inner reference electrode and an outer reference electrode which are arranged in parallel, the inner reference electrode extends into the inner reference solution, and the outer reference electrode extends into the outer reference solution; the connector is characterized by comprising a connector body, a first conductive part and a second conductive part, wherein the first conductive part and the second conductive part are arranged on the connector body; the second conductive portion is electrically connected to the inner reference electrode, and the second conductive portion is also configured in a cylindrical shape and disposed inside the outer reference electrode.
2. The pH detecting probe according to claim 1, wherein the engaging portion is an L-shaped opening.
3. The pH detecting probe according to claim 1, wherein the outer edge of the adapter body is provided with anti-slip threads.
4. The pH detecting probe according to claim 1, wherein the open end of the probe body is provided with a plurality of openings at intervals for exposing the electrode bulbs.