CN210294145U - Pump suction type electrochemical sensor - Google Patents

Abstract

The utility model discloses a pump suction formula electrochemical sensor, including first apron, box body, second apron and sensor body, the box body is through the spacing detector of installing of holding tank, the box body deviates from one side of holding tank and has seted up the battery jar, install the battery in the battery jar, the box body is located having seted up of battery jar and has detected the chamber, it installs the diaphragm pump to detect the intracavity, sensor body bottom surface mosaic has the pin, sensor body's inside is equipped with solid-state electrolyte, the inside bottom that is located solid-state electrolyte of sensor body is equipped with counter electrode and reference electrode, solid-state electrolyte's top is equipped with working electrode, working electrode's top is equipped with the ventilated membrane, the top of ventilated membrane is equipped with the filter. The utility model discloses possess through being linked together diaphragm pump air inlet and sensor inside, because the effect of bleeding of diaphragm pump, the gas that awaits measuring is inhaled fast in the sensor and reacts with it, obtains the advantage of detection effect fast and accurately.

Description

Pump suction type electrochemical sensor

Technical Field

The utility model relates to a gaseous detection sensor technical field specifically is a pump suction formula electrochemical sensor.

Background

Electrochemical sensors work by reacting with the gas to be measured and generating an electrical signal proportional to the gas concentration, and at the present stage, there are two main methods for using the electrochemical sensors on the market: one is to place the sensor in the gas to be detected, carry the gas molecules into the sensor by means of natural convection of the gas to participate in the reaction, and finally obtain the data. The method has the advantages that the structure is simple, the cost is low, but the defects are obvious, and the response time of the whole sensor system is too long and the detection result cannot be obtained in a short time due to natural convection and slow flow rate of gas to be detected; the other is to arrange the sensor in the gas to be detected, and add a fan on the outside of the structural part to increase the flow rate of the gas and improve the detection response speed of the sensor system. The method has the advantages that the detection speed can be improved to a certain degree, but the method has the defects that the gas can only be brushed off from the surface of the sensor, and when the concentration of the harmful gas is low and the flow rate is high, the detection is missed with probability, and the problems are urgently needed to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pump suction formula electrochemical sensor, possess through being linked together diaphragm pump air inlet and sensor inside, because the effect of bleeding of diaphragm pump, the gas that awaits measuring is inhaled in the sensor fast and is reacted with it, fast and accurately obtain the advantage of detection effect, the nature convection current of having solved and relying on gas brings the gas molecule into the sensor and participates in the reaction, can't obtain the testing result in the short time, and install the fan through the structure externally additional and increase gaseous flow rate, but gas still can only be followed the sensor surface and brushed, when harmful gas concentration is lower and the velocity of flow is very fast, the problem of probability quilt hourglass inspection.

In order to achieve the above object, the utility model provides a following technical scheme: a pump-suction type electrochemical sensor comprises a first cover plate, a box body, a second cover plate and a sensor body, wherein one end of the box body is provided with a holding tank, the box body is provided with a detector in a limiting way through the holding tank, the top end of the detector is covered with the second cover plate, one side of the box body, which is far away from the second cover plate, is covered with the first cover plate, one side of the box body, which is far away from the holding tank, is provided with a battery, the box body is positioned in a detection cavity of the battery, a diaphragm pump is arranged in the detection cavity, the side, which is far away from the second cover plate, is provided with a sensor body, the bottom end surface of the sensor body is embedded with pins, the sensor body is internally provided with solid electrolyte, the bottom end, which is positioned in the solid electrolyte, of the sensor body is provided with a counter, the top end of the working electrode is provided with a breathable film, and a filter is arranged above the breathable film.

Preferably, an air inlet hole is formed in the surface of one side, corresponding to the sensor body, of the detection cavity in a penetrating mode.

Preferably, a gas outlet is formed in the position, between the solid electrolyte and the gas permeable membrane, of one side surface of the sensor body.

Preferably, the top surface of the sensor body is provided with an air hole in a penetrating manner.

Preferably, the working electrode is electrically connected with the pin through a lead.

Preferably, the air outlet is communicated with an air inlet of the diaphragm pump through an air pipe.

Preferably, the first cover plate and the second cover plate are the same in size, and the first cover plate and the second cover plate are fixedly connected with the box body through screws.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses a set up the diaphragm pump, reached the flow rate that improves the gas that awaits measuring, and can make gas pass through from the sensor body, so, no matter how low, how fast the velocity of flow of harmful gas has, do not all exist by the effect of the possibility of examining of leaking, receive the influence of smell in the pump after flowing out in order to avoid gas from the diaphragm pump, lead to the testing result inaccurate, with the air inlet and the sensor is inside to link to each other, make the gas that awaits measuring get into the sensor earlier, avoid the testing result to receive the influence of air pump.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of the electrochemical sensor according to the present invention.

In the figure: 1. a first cover plate; 2. a battery case; 3. a box body; 4. accommodating grooves; 5. a second cover plate; 6. a detector; 7. an air inlet; 8. a sensor body; 9. a diaphragm pump; 10. a storage battery; 11. a counter electrode; 12. A solid electrolyte; 13. a working electrode; 14. a gas permeable membrane; 15. a filter; 16. air holes are formed; 17. an air outlet; 18. a reference electrode; 19. a pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 2, the present invention provides an embodiment: a pump-suction type electrochemical sensor comprises a first cover plate 1, a box body 3, a second cover plate 5 and a sensor body 8, wherein one end of the box body 3 is provided with a containing groove 4, the box body 3 is provided with a detector 6 in a limiting way through the containing groove 4, the detector 6 uses an MEF-600 type detector 6, the top end of the detector 6 is covered with the second cover plate 5, one side of the box body 3, which is far away from the second cover plate 5, is covered with the first cover plate 1, the first cover plate 1 and the second cover plate 5 have the same size, the first cover plate 1 and the second cover plate 5 are both connected and fixed with the box body 3 through screws, one side of the box body 3, which is far away from the containing groove 4, is provided with a battery 2, the battery 10 is arranged in the battery 2, the battery 10 uses a detection cavity, which is positioned in the battery 2, of the rechargeable battery box body 3, and is, this diaphragm pump 9 is small, light in weight, compact structure, be convenient for install, through setting up diaphragm pump 9, the flow rate that improves the gas that awaits measuring has been reached, and can make gas pass through from sensor body 8, so, no matter how low the concentration of harmful gas has, how fast the velocity of flow has, the effect of the possibility of examining by the hourglass does not exist all, in order to avoid gas to receive the influence of smell in the diaphragm pump 9 after flowing out from the pump, lead to the testing result inaccurate, link to each other diaphragm pump 9 air inlet and sensor inside, make the gas that awaits measuring take turns into the sensor earlier, avoid the testing result to receive the air pump influence, sensor body 8 is installed to the one side that deviates from diaphragm pump 9 in the detection chamber.

The top surface of the sensor body 8 is provided with an air vent 16 in a penetrating way, the side surface of the detection cavity corresponding to the sensor body 8 is provided with an air inlet 7 in a penetrating way, the bottom surface of the sensor body 8 is embedded with a pin 19, the sensor body 8 is internally provided with a solid electrolyte 12, the solid electrolyte 12 uses mineral acid, the sensor body 8 is internally provided with a counter electrode 11 and a reference electrode 18 which are positioned at the bottom end of the solid electrolyte 12, a working electrode 13 is arranged above the solid electrolyte 12, the counter electrode 11, the working electrode 13 and the reference electrode 18 are all composed of large-surface-area noble metal and a porous anaerobic water film, the working electrode 13 is in contact with the solid electrolyte and the ambient air and is monitored by a porous film, gas diffuses into the working electrode 13 in the sensor body 8 through the back surface of the porous film, the gas is oxidized or reduced, and the electrochemical reaction causes the, working electrode 13 and pin 19 pass through wire electric connection, and the top of working electrode 13 is equipped with ventilated membrane 14, and one side surface of sensor body 8 is located and has seted up gas outlet 17 between solid-state electrolyte 12 and ventilated membrane 14, and gas outlet 17 passes through the trachea and communicates with the air inlet of diaphragm pump 9, and the top of ventilated membrane 14 is equipped with filter 15.

When the user uses the gas sensor, the sensor body 8 is connected with the detector 6 through a signal line signal, then the air inlet of the diaphragm pump 9 is communicated with the sensor air outlet 17, then the diaphragm pump 9 is communicated with the storage battery 10 through a switch, the diaphragm pump 9 starts to pump air, the flow rate of the gas to be detected is improved, and the gas can pass through the sensor body 8, so that no matter how low the concentration of harmful gas is and how fast the flow rate is, the possibility of leakage detection does not exist, in order to avoid the influence of the gas on the smell in the diaphragm pump 9 after flowing out of the pump, and the inaccurate detection result, the air inlet of the diaphragm pump 9 is connected with the inside of the sensor, the gas to be detected enters the sensor at first, the detection result is prevented from being influenced by the gas pump, the gas diffuses into the working electrode 13 in the sensor body 8 through the back of the porous membrane, this electrochemical reaction causes a current to flow through the detector 6.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a pump-suction type electrochemical sensor, includes first apron (1), box body (3), second apron (5) and sensor body (8), its characterized in that: the detection device is characterized in that a holding tank (4) is arranged at one end of the box body (3), the box body (3) is provided with a detector (6) in a limiting mode through the holding tank (4), a second cover plate (5) is arranged on the top end of the detector (6) in a covering mode, a first cover plate (1) is arranged on one side, deviating from the second cover plate (5), of the box body (3), a battery jar (2) is arranged on one side, deviating from the holding tank (4), of the box body (3), a storage battery (10) is arranged in the battery jar (2), the box body (3) is located in a detection cavity formed in the battery jar (2), a diaphragm pump (9) is arranged in the detection cavity, a sensor body (8) is arranged on one side, deviating from the diaphragm pump (9), of the detection cavity is provided with a base pin (19), a solid electrolyte (12) is, the sensor is characterized in that a counter electrode (11) and a reference electrode (18) are arranged at the bottom end, located on a solid electrolyte (12), of the sensor body (8), a working electrode (13) is arranged above the solid electrolyte (12), a breathable film (14) is arranged at the top end of the working electrode (13), and a filter (15) is arranged above the breathable film (14).

2. The pumping electrochemical sensor according to claim 1, wherein: an air inlet (7) is formed in the surface of one side, corresponding to the sensor body (8), of the detection cavity in a penetrating mode.

3. The pumping electrochemical sensor according to claim 1, wherein: and a gas outlet (17) is formed in the position, on one side surface of the sensor body (8), between the solid electrolyte (12) and the gas permeable membrane (14).

4. The pumping electrochemical sensor according to claim 1, wherein: the top surface of the sensor body (8) is provided with air holes (16) in a penetrating way.

5. The pumping electrochemical sensor according to claim 1, wherein: the working electrode (13) is electrically connected with the pin (19) through a lead.

6. A pumping electrochemical sensor according to claim 3, wherein: the air outlet (17) is communicated with an air inlet of the diaphragm pump (9) through an air pipe.

7. The pumping electrochemical sensor according to claim 1, wherein: the first cover plate (1) and the second cover plate (5) are the same in size, and the first cover plate (1) and the second cover plate (5) are fixedly connected with the box body (3) through screws.

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