CN2125826U

CN2125826U - Improved strusture of conduction container

Info

Publication number: CN2125826U
Application number: CN 92225937
Authority: CN
Inventors: 季春峰; 蔡咏棠; 何树才
Original assignee: NO 12 INST MINISTRY OF MACHINE
Current assignee: NO 12 INST MINISTRY OF MACHINE
Priority date: 1992-07-01
Filing date: 1992-07-01
Publication date: 1992-12-23

Abstract

The utility model relates to the improved structure of the conductance cell. A cylindrical stainless-steel outer electrode is used as a measuring electrode, and is also used as the outer housing of the water storing container. A water inlet mouth and a water outlet mouth are arranged on the outer housing. A rubber protective hood is arranged on the position of a leading wire plug. The design overcomes the disadvantages of complicated structure, enormous volume and hard disassembly and assembly of the original conductance cell. The volume of the existing conductance cell is one tenth of the volume of the original conductance cell, the structure is firm and portable, and the manufacturing cost of the existing conductance cell is one forth of the manufacturing costs of the original conductance cell. The measured number value of the conductance value is accuracy, and the performance is stable.

Description

Improved strusture of conduction container

The utility model relates to the measurement to the electric conductivity value of water, belongs to chemical analysis instrument field.

In chemical plant, fuel-burning power plant and many water treatment systems, will be to the water quality situation of various waters (feedwater, boiler water, steam condensation water etc.), monitor, generally the mode of employing measurement aqueous solution electric conductivity value monitors the purity of water, and the state of impurities.By a conversion equipment, claim conductance cell, measure the electric conductivity value of water, conductance cell is the transmitter of conductance type analysis meter just, mainly be made of electrode and water container etc., be full of tested aqueous solution in the pond, the electrode that is adopted can have different materials and shape, formula calculates the electrode constant of the conductance cell of different electrode sizes routinely, with the supporting use of instrument.In order to prevent electrode polarization and fouling, will be in the use often to the conductance cell disassembly, cleaning, this just needs its sound construction reliably to be easy to dismounting.

Existing conductance cell is all made by traditional structure, and it comprises the ring flange of the very big shell of volume, two very big water inlets and water outlet, and thread guide devices, the DDD-32B type conductance cell of the Shanghai thunder magnetic factory production of use for example generally is provided, and volume is very big, accounts for (250mm) ³About, the conductance cell O﹠M of this old-fashioned structure is all inconvenient, when cleaning, dismounting, turn repeatedly nut, ring flange easy deformation or twist and split, have a strong impact on measuring accuracy and instrument serviceable life, from execute-in-place, people wish the structure of conductance cell is simplified and changed very much.

The design's purpose is exactly at this problem, proposes a kind of dismounting easy to use, simple in structure, easy, and conductivity cell structure stable and reliable for performance.

In conjunction with the accompanying drawings, the structure to the design describes:

Provide modified conductivity cell structure diagrammatic cross-section among the figure, ［ 1 ］ locating ring wherein, ［ 2 ］ interior electrode; ［ 3 ］ external electrode, ［ 4 ］ collets, ［ 5 ］ terminal box; ［ 6 ］ rubber protective cover, ［ 7 ］ terminal pin, ［ 8 ］ connecting line; ［ 9 ］ adjust nut; ［ 10 ］ rubber seal, ［ 11 ］ retaining ring, ［ 12 ］ thermistor; ［ 13 ］ faucet, ［ 14 ］ water inlet tap.

The design can make the conductance cell overall dimension reduce about about 10 times than existing product size, and because external electrode ground connection, the stability of performance is improved.In the design, internal and external electrode adopts concentric garden tubular, material is a stainless steel, external electrode ［ 3 ］ is the electrode when measuring both, again as the shell of water container, replaced plastic casing huge in the existing product, during use, be added with a little ac potential between it and the interior electrode ［ 2 ］, can directly draw the electric conductivity value of tested water from instrument, locating ring ［ 1 ］ is in being used for fixing, position between the external electrode is improved measuring accuracy, numerical stability, it in addition, also has many fine sieve apertures with teflon car system on the locating ring, be for the impurity that is contained in the water that flows through is had a filtration, to increase water quality.The material of collets ［ 4 ］ also is a teflon; it is further fixed the internal and external electrode tube and separates; and aqueous solution and terminal box partly separated; the connecting line ［ 8 ］ that is contained in the terminal box causes the outside by terminal pin ［ 7 ］ (selection standard spare aviation plug); because this plug is the aluminum standard part; the permanent use especially used under soda acid atmosphere; very easily corroded and can't be worked; conductivity cell structure in the past is that it is placed in the organic glass cover of a sealing; volume is very huge; use inconvenience,, be convenient to operation for simplified structure; designed tubular rubber protective cover ［ 6 ］; it is tight encases plug, the corrosion of anti-equally effectively soda acid and objectionable impurities, and volume has reduced greatly.Adjust nut ［ 9 ］ and be electrode in being used for changing and stretch into height in the water, the electrode constant of trying to achieve in order to make is accurate, and this height is adjusted before measurement, after calibrating with the standard conductance cell, promptly is fixed up.Rubber gasket ［ 10 ］ plays fixing and sealing function, and it can prevent that sealing infiltrates the terminal box part, and retaining ring ［ 11 ］ is to have locking effect in assembling process, and it provides convenience for cleaning, the dismounting of conductance cell.

Because the conductance measurement value converts under the uniform temperature condition, therefore under arbitrary temp, will revise reading, thermistor ［ 12 ］ is exactly to be provided with in order to carry out temperature compensation, in the electrode hole, is drawn by lead in it is contained in.Nozzle and spout ［ 14 ］, ［ 13 ］ are separately fixed on the shell, it has replaced connecting with ring flange in the existing procucts method of water passage, this water faucet structure is lighter than flange plate structure, flexibly, not fragile, not influenced by ambient temperature, and need not set up corollary apparatus, can save erected cost.

This structure has following advantage: 1, comparing in the past, small product size reduces 10 times nearly.2, ponding is few in the structure, does not have hysteresis phenomenon during measurement, so the data reflection rapidly, accurately.3, this structure easy accessibility is easy to clean maintenance.4, cost is 1/4 of an existing product, obviously saves material.

Most preferred embodiment: having designed electrode constant is 0.1,0.01 two kind of conductance cell, and inside and outside electrode is a stainless steel garden tubular, is that 0.01 sample is an example with electrode constant, and the inside and outside diameter of interior electrode is respectively φ 5mm, φ 20mm, and length is 82mm.The inside and outside diameter of external electrode is respectively φ 29mm, φ 32mm, and length is 70mm.The rubber protective cover is the garden barrel shape of external diameter 13mm, wall thickness 2mm, high 25mm.Locating ring ［ 1 ］ forms with teflon car system, and many 14 microns sieve apertures are arranged on the ring, the impurity of water is played a role in filtering, to increase water quality.

This conductance cell total length 160mm, overall diameter φ 32mm, simple in structure, firm, be easy to dismounting.Through calibrating with the standard conductance cell, measuring accuracy is accurate, stable performance.

Claims

1, a kind of transmitter of conductance type analysis meter (being called conductance cell again), mainly by the inside and outside electrode of concentric garden tubular, water container, nozzle and spout, terminal box, thermistor, terminal pin and outer cover etc. thereof are continuous to form, it is characterized in that: garden tubular external electrode [3] is not only as potential electrode but also as the shell of water container, is added with locating ring [1] between it and the interior electrode [2], outsidely by retaining ring [11] external electrode and terminal box is linked to be an one-piece construction.

2, according to the described conductance cell of claim 1, it is characterized in that: locating ring ［ 1 ］ also has many fine sieve apertures, to impurity filtration in the water on it except that internal, external electrode are located.

3, according to the described conductance cell of claim 1, it is characterized in that the outer cover of terminal pin ［ 7 ］ adopts garden tubular rubber protective cover ［ 6 ］, it closely encases plug.