CN2166424Y - Anti-explosive two-wire liquid level analogue signal converter - Google Patents
Anti-explosive two-wire liquid level analogue signal converter Download PDFInfo
- Publication number
- CN2166424Y CN2166424Y CN 93228432 CN93228432U CN2166424Y CN 2166424 Y CN2166424 Y CN 2166424Y CN 93228432 CN93228432 CN 93228432 CN 93228432 U CN93228432 U CN 93228432U CN 2166424 Y CN2166424 Y CN 2166424Y
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- China
- Prior art keywords
- liquid level
- signal converter
- explosion
- utility
- model
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Level Indicators Using A Float (AREA)
Abstract
The utility model relates to an anti-explosive two-wire liquid level analogue signal converter matched with the magnet float liquid level gauge in the technical field of chemical industry, comprising a sensing unit and a voltage-current converter, wherein, the sensing unit is formed by a circuit board (2) of a casing (1), which is connected with a plurality of resistors (3) in series and connected with reed switches (4) of same quantity in parallel, the sensing unit is connected with a PM2W voltage current converter (9), and the connection of the two parts, and the connection of a terminal box (8), and a box cover (11) are respectively provided with an explosion suppression surface. The utility model has the advantages of simple structure, safety explosion resistance, low standard voltage supply, small power consumption provided for a circuit, etc. The standard current signal output from the utility model can be used for networking of a microcomputer.
Description
The utility model relates to explosion-proof type two-wire system liquid level analog signal converter, it is a kind of supporting remote transfer signal device of magnetic float liquidlevel meter for the application of chemical industry field.
Existing two-wire system liquid level analog signal converter, owing to adopt the sensor of resistance-type in the structure, (0～10VDC) height, wasted work is big, uneasy congruent shortcoming so the normal voltage that provides in the circuit is provided.
In order to overcome the deficiency that exists in the prior art, the utility model will design a kind of compact conformation, safety anti-explosive, a kind of two-wire system liquid level analog signal converter that measuring accuracy is high.
In order to achieve the above object, technical solution of the present utility model is, adopt the sensor of potentiometer type supporting with the PM2W voltage current adapter of first usefulness, the low-voltage of standard is provided in circuit, the while all is provided with the safety of explosion suppresion surface in guaranteeing to use in the junction of parts.Accompanying drawing 1 is the structural representation of explosion-proof type two-wire system liquid level analog signal converter of the present utility model.For structure of the present utility model and principle are had further understanding, enumeration is as follows in conjunction with the accompanying drawings:
Among the figure, the structure of explosion-proof type two-wire system liquid level analog signal converter has comprised sensor and voltage current adapter two parts composition.Wherein sensor has comprised sensor housing (1), the sensor circuit board of establishing in the housing (1) (2), several resistance (3) that go up to be provided with at circuit board (2) and with corresponding several tongue tubes of resistance (3) (4); Its voltage, current converter are voltage, the current converters (9) that the PM2W type is housed in terminal board (8), circuit board (2) is connected the lead (5) with overcoat insulating sleeve (7) with the circuit of voltage current adapter (9), be provided with a sealing gasket (6) between sensor housing (1) and the terminal board (8), also be provided with an attaching nut (10) in outside, their joints, (11) are the lid of terminal board (8).In the junction of attaching nut (10) with housing (1) and terminal board (8), and the junction of terminal board (8) and lid (11), all be provided with explosion suppresion surface, its cylinder explosion suppresion surface W≤0.2, L 〉=25, screw-threaded engagement button number 〉=6 are screwed into the degree of depth 〉=9.
The principle of work of this converter is, circuit board (2) is gone up and liquid level is provided with pro rata several resistance (3) and tongue tube (4) at sensor, resistance (3) is connected in the line, the ring resistance that is equivalent to potentiometer, when the magnetic float is risen in limited time by lower limit with liquid level, with resistance and the tongue tube (4) that connects from the bottom up one by one the pass, open, plan is that the pivoted arm of potentiometer moves and changes potential value, and the proportional current that converts DC4-20mA through PM2W voltage current adapter (9) to sends out.
Explosion-proof type two-wire system liquid level analog signal converter of the present utility model, have simple in structure, explosion-proof characteristics such as reasonable in design, owing to adopt the sensor of potentiometer type to combine with the PM2W voltage current adapter, the standard electric that provides in the circuit is forced down, power consumption is little, and improved measuring accuracy, the normalized current signal of output can supply microcomputer network.
Claims (2)
1, a kind of explosion-proof type two-wire system liquid level analog signal converter, it includes sensor and voltage current adapter two parts are formed, it is characterized in that sensor is a potentiometer type, several resistance (3) of contacting in the circuit of sensor circuit board (2) are with corresponding many tongue tubes (4) and connect; Voltage current adapter is the PM2W type.
2, a kind of explosion-proof type two-wire system liquid level analog signal converter according to claim 1, it is characterized in that the outer terminal board (8) of sensor housing (1) and converter (9) and attaching nut's (10) the junction and the junction of terminal board (8) and its lid (11) all are provided with explosion suppresion surface, its cylinder explosion suppresion surface is W≤0.2, L 〉=25, joggle number 〉=6 of screw thread are screwed into the degree of depth 〉=9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228432 CN2166424Y (en) | 1993-05-29 | 1993-05-29 | Anti-explosive two-wire liquid level analogue signal converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228432 CN2166424Y (en) | 1993-05-29 | 1993-05-29 | Anti-explosive two-wire liquid level analogue signal converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2166424Y true CN2166424Y (en) | 1994-05-25 |
Family
ID=33805482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93228432 Expired - Fee Related CN2166424Y (en) | 1993-05-29 | 1993-05-29 | Anti-explosive two-wire liquid level analogue signal converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2166424Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457992A (en) * | 2020-06-04 | 2020-07-28 | 河南菲普斯特仪器仪表有限公司 | High-sealing explosion-proof magnetic liquid level meter |
| CN113483853A (en) * | 2021-08-12 | 2021-10-08 | 西门子电站自动化有限公司 | Device and method for measuring level value of drain tank |
-
1993
- 1993-05-29 CN CN 93228432 patent/CN2166424Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457992A (en) * | 2020-06-04 | 2020-07-28 | 河南菲普斯特仪器仪表有限公司 | High-sealing explosion-proof magnetic liquid level meter |
| CN113483853A (en) * | 2021-08-12 | 2021-10-08 | 西门子电站自动化有限公司 | Device and method for measuring level value of drain tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |