CN202735301U - Water hardness testing device - Google Patents
Water hardness testing device Download PDFInfo
- Publication number
- CN202735301U CN202735301U CN 201220388208 CN201220388208U CN202735301U CN 202735301 U CN202735301 U CN 202735301U CN 201220388208 CN201220388208 CN 201220388208 CN 201220388208 U CN201220388208 U CN 201220388208U CN 202735301 U CN202735301 U CN 202735301U
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- emitter follower
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Abstract
The utility model discloses a water hardness testing device, which is characterized by at least comprising a shell body (1). One side of the shell body (1) is provided with a testing water inlet (6), the other side of the shell body (1) is provided with a testing water outlet (4), a tank (5) for liquid to be tested is arranged between the testing water inlet (6) and the testing water outlet (4), one end of a calomel electrode (3) and one end of a calcium electrode (2) respectively extend into the tank (5) for liquid to be tested, and the other ends of the calomel electrode (3) and the calcium electrode (2) are electrically connected with a processing circuit (7). The water hardness testing device has the advantages that the hardness of water filled in a boiler can be detected automatically and continuously, alarm can be uttered when the water hardness exceeds the standard, and the device can be operated easily and can work stably and reliably.
Description
Technical field
The utility model belongs to a kind of detection pick-up unit, particularly a kind of water hardness detection device.
Background technology
Contain a large amount of calcium ions and magnesium ions in the nature water, boiler directly uses with the former water of calcium ions and magnesium ions, will make gyp, has a strong impact on boiler safety, economical operation, and therefore, the Industrial Boiler water must be processed through softening.Relevant regulations according to national labour protection department; the hardness of boiler feed water must not be higher than corresponding hardness number, and traditional employing chemical method detects the water hardness of water inlet, and its shortcoming is to chemically examine by timing sampling; can not be real-time; continuous detecting can not in time be shown the unexpected variation of water quality, and; this method detection speed is slow; the chemical reagent consumption expense is high, thereby, be difficult to guarantee for a long time that boiler feed water hardness reaches the hardness number of national labour protection department regulation.
Summary of the invention
The purpose of this utility model provides and a kind ofly can detect the warning that exceeds standard, and simple to operate, the reliable water hardness detection device of working stability to boiler feed water hardness Automatic continuous.
The purpose of this utility model is to realize like this, water hardness detection device, it is characterized in that: comprise at least housing, housing one side has the detection water inlet, opposite side has the detection water out, detect water inlet and detect water out that this has detected liquid cell, mercurous chloride electrode and calcium electrode respectively an end stretch in the detected liquid cell, and the other end is electrically connected with treatment circuit.
Described treatment circuit comprises the two-way emitter follower, the two-way emitter follower is made of two amplifiers, the two-way measuring amplifier, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode and calcium electrode are electrically connected to respectively the input end of two-way emitter follower, the output terminal of two-way emitter follower is electrically connected with the input of comparer, and comparer output is electrically connected with warning circuit.
Described treatment circuit comprises the two-way emitter follower, the two-way emitter follower is made of two amplifiers, the two-way measuring amplifier, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode and calcium electrode are electrically connected to respectively the input end of two-way emitter follower, the output terminal of two-way emitter follower is electrically connected with the two-way measuring amplifier, and the two-way measuring amplifier is electrically connected with the input port of single-chip microcomputer with the A/D conversion, and single-chip microcomputer one I/O is electrically connected with warning circuit.
Described treatment circuit is electrically connected with LCD display and keyboard circuit.
The utility model has the advantages that: owing to adopt electrochemical method, can detect boiler feed water hardness Automatic continuous, warning exceeds standard, working stability simple to operate is reliable, thereby improved accuracy of detection, reduced the boiler operatiopn expense, alleviated personnel labor intensity, guaranteed that boiler feed water hardness can not surpass the hardness number of regulation.
Description of drawings
The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:
Fig. 1 is the utility model example structure synoptic diagram;
Fig. 2 is embodiment 1 circuit theory diagrams;
Fig. 3 is embodiment 2 circuit theory diagrams.
Among the figure, 1, housing; 2, calcium electrode; 3, mercurous chloride electrode; 4, detect water out; 5, detected liquid cell; 6, detect water inlet; 7, treatment circuit; 8, keyboard circuit; 9, warning circuit; 10, LCD display.
Embodiment
As shown in Figure 1, at least comprise housing 1, housing 1 one sides have the water inlet 6 of detection, opposite side has the water out 4 of detection, detect water inlet 6 and detect water out 4 that this has detected liquid cell 5, mercurous chloride electrode 3 and calcium electrode 2 respectively an end stretch in the detected liquid cell 5, and the other end is electrically connected with treatment circuit 7.
As shown in Figure 2, treatment circuit 7 comprises two-way emitter follower IC1 and IC2, the two-way emitter follower is made of two amplifiers, two-way measuring amplifier IC3 and IC4, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode 3 and calcium electrode 2 are electrically connected to respectively the input end of two-way emitter follower IC1 and IC2, and the output terminal of two-way emitter follower IC1 and IC2 is electrically connected with the input of comparer IC5, and comparer output is electrically connected with warning circuit 9.
As shown in Figure 1, at least comprise housing 1, housing 1 one sides have the water inlet 6 of detection, opposite side has the water out 4 of detection, detect water inlet 6 and detect water out 4 that this has detected liquid cell 5, mercurous chloride electrode 3 and calcium electrode 2 respectively an end stretch in the detected liquid cell 5, and the other end is electrically connected with treatment circuit 7.
As shown in Figure 3, treatment circuit 7 comprises two-way emitter follower IC1 and IC2, the two-way emitter follower is made of two amplifiers, two-way measuring amplifier IC3 and IC4, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode 3 and calcium electrode 2 are electrically connected to respectively the input end of two-way emitter follower IC1 and IC2, and the output terminal of two-way emitter follower IC1 and IC2 is electrically connected with the single-chip microcomputer input port of changing with A/D, and single-chip microcomputer one I/O is electrically connected with warning circuit 9.Treatment circuit 7 is electrically connected with LCD display 10 and keyboard circuit 8, by LCD display and keyboard circuit input water hardness warning upper lower limit value, shows flow, temperature, water hardness value by LCD display.
Single-chip microcomputer with the A/D conversion is mas430.
Principle of the present utility model is: the ability of water hardness refer initially to calcium, magnesium ion precipitation soap.The total hardness of water refers to the total concentration of calcium in the water, magnesium ion, comprising carbonate hardness (calcium that namely precipitates with carbonate form by heating energy, magnesium ion, so be again temporary hardness) and non-carbonate hardness (part calcium, the magnesium ion that namely can not precipitate after the heating claim again Permanent hardness).Calcium ion is maximum to the contribution of total hardness generally speaking, and for relatively-stationary a certain area, the shared ratio of calcium ions and magnesium ions is again relatively stable, so, detect calcium ion concentration, just indirectly shown the total hardness of local water quality.
Calcium electrode is as detecting electrode, and mercurous chloride electrode is as contrast electrode, and calcium electrode, mercurous chloride electrode form primary element with detected boiler feed water.
The electromotive force of primary element is relevant with calcium ion concentration in the tested water, the small electric kinetic potential of primary element is amplified, and then the reference voltage Ef with inside compares, if the small electric kinetic potential Ex of primary element〉hardness of reference voltage Ef explanation water inlet exceeds standard, instrument is then reported to the police, otherwise does not report to the police.Before the first use of calcium electrode, according to the request for utilization of electrode, need to add in 0.1 mole of lime chloride and fill solution (instrument is with), then invade bubble and in water to be detected, activate 24 hours.Calcium electrode belongs to exact instrument, and the PVC film of electrode front end has ion and selects permeation, can not use hard object contact, in order to avoid damage.The high impedance plug of calcium electrode lead-in wire is answered the socket bottom at the inserting instrument back side, and then tightening fixed screw can use.
Mercurous chloride electrode needs to add saturated Klorvess Liquid in mercurous chloride electrode after using continuously a period of time, and need to maintain the potassium chloride of separating out on a small quantity, and calcium electrode uses the time about 2 months continuously, also will add 0.1 mole of calcium chloride solution.Note in the mercurous chloride electrode bubble can not being arranged, in order to avoid " salt bridge " opens circuit.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (4)
1. water hardness detection device, it is characterized in that: comprise at least housing (1), housing (1) one side has detection water inlet (6), opposite side has detection water out (4), this has detected liquid cell (5) to detect water inlet (6) and detection water out (4), a mercurous chloride electrode (3) and calcium electrode (2) respectively an end stretch in the detected liquid cell (5), and the other end is electrically connected with treatment circuit (7).
2. water hardness detection device according to claim 1, it is characterized in that: described treatment circuit (7) comprises the two-way emitter follower, the two-way emitter follower is made of two amplifiers, the two-way measuring amplifier, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode (3) and calcium electrode (2) are electrically connected to respectively the input end of two-way emitter follower, and the output terminal of two-way emitter follower is electrically connected with the input of comparer, and comparer output is electrically connected with warning circuit (9).
3. water hardness detection device according to claim 1, it is characterized in that: described treatment circuit (7) comprises the two-way emitter follower, the two-way emitter follower is made of two amplifiers, the two-way measuring amplifier, the two-way measuring amplifier is comprised of three amplifiers, mercurous chloride electrode (3) and calcium electrode (2) are electrically connected to respectively the input end of two-way emitter follower, the output terminal of two-way emitter follower is electrically connected with the two-way measuring amplifier, the two-way measuring amplifier is electrically connected with the input port of single-chip microcomputer with the A/D conversion, and single-chip microcomputer one I/O is electrically connected with warning circuit (9).
4. water hardness detection device according to claim 1, it is characterized in that: described treatment circuit (7) is electrically connected with LCD display (10) and keyboard circuit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388208 CN202735301U (en) | 2012-08-07 | 2012-08-07 | Water hardness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388208 CN202735301U (en) | 2012-08-07 | 2012-08-07 | Water hardness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735301U true CN202735301U (en) | 2013-02-13 |
Family
ID=47660987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220388208 Expired - Fee Related CN202735301U (en) | 2012-08-07 | 2012-08-07 | Water hardness testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202735301U (en) |
-
2012
- 2012-08-07 CN CN 201220388208 patent/CN202735301U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150807 |
|
| EXPY | Termination of patent right or utility model |