CN102353422A - Device, circuit and method for detecting liquid level of nitric acid storage tank - Google Patents
Device, circuit and method for detecting liquid level of nitric acid storage tank Download PDFInfo
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- CN102353422A CN102353422A CN 201110194922 CN201110194922A CN102353422A CN 102353422 A CN102353422 A CN 102353422A CN 201110194922 CN201110194922 CN 201110194922 CN 201110194922 A CN201110194922 A CN 201110194922A CN 102353422 A CN102353422 A CN 102353422A
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Abstract
The invention relates to a device, a circuit and a method for detecting the liquid level of a nitric acid storage tank. The device comprises a nitric acid storage tank, a nitric acid storage tank inlet pipe (9) and a nitric acid storage tank outlet pipe (10), and is characterized in that: a liquid level detection device is arranged on the nitric acid storage tank. In the invention, the liquid level of the nitric acid storage tank can be displayed on site according to the position of a metal balance counter weight, so that the problems of unsafe factors and labor which exist during manual measurement of the liquid level of the nitric acid storage tank when necessary in the prior art are solved.
Description
Technical field
The present invention relates to a kind of liquid level detection device, testing circuit and detection method, especially relate to a kind of nitric acid tank level pick-up unit, testing circuit and detection method.
Background technology
Big Red Hill pipeline company dehydrating station is because the production equipment arts demand must use nitric acid; And nitric acid dosage is big; So it is that nitric acid about 30 tons HDPE plastics nitric acid storage tank stores 50%--65% satisfies cleaning ceramic filter needs that dehydrating station nitric acid adopts 2 capacity; Every ceramic filter operation must be cleaned its ceramic wafer after 7 hours, and its cleaning way requires to use 60% nitric acid, and every equipment cleaning time is about 40 to 50 minutes; It is big that nitric acid cleans use amount, is in 30 tons the storage tank so need nitric acid be stored in two capacity.
Because; The nitric acid storage tank is because the nitric acid of storage is Hazardous Chemical Substances; Must grasp inner nitric acid level condition constantly comes the production run at tissue dewatering station and satisfies security needs; So must there be the nitric acid liquid level detecting apparatus to come the nitric acid storage tank is detected, pick-up unit requires and can either show on the spot at the scene, also can satisfy the needs of the electrical control of relevant device.
Summary of the invention
The present invention has designed a kind of nitric acid tank level pick-up unit, testing circuit and detection method, and it has solved former nitric acid tank level and has measured with manual work when needed, has unsafe factor and labour's problem.
In order to solve the technical matters of above-mentioned existence, the present invention has adopted following scheme:
A kind of nitric acid tank level pick-up unit comprises nitric acid storage tank, nitric acid storage tank induction pipe (9) and nitric acid storage tank outlet (10), on said nitric acid storage tank, is provided with a liquid level detection device.
Further; Said liquid level detection device comprises metal balance weight (1), stainless steel rope (2), pulley part and stainless steel liquid level ball float (5); It is outside that metal balance weight (1) is positioned at the nitric acid storage tank; Stainless steel liquid level ball float (5) floats on the nitric acid liquid level (8), and metal balance weight (1) is connected with pulley through stainless steel rope (2) with stainless steel liquid level ball float (5).
Further; Said pulley comprises left chain wheel parts (3) and right pulley parts (4); Said left chain wheel parts (3) and said right pulley parts (4) are positioned at same surface level; And said right pulley parts (4) are positioned at nitric acid storage tank top, and said left chain wheel parts (3) are positioned at directly over the said metal balance weight (1).
Further; Also comprise the upper limit inductance near switch (6) and lower limit inductance near switch (7); Said upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch (6), and said lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch (7).
A kind of nitric acid tank level testing circuit; Comprise along the nitric acid storage tank move up and down metal balance weight (1), upper limit inductance near switch (6) and lower limit inductance near switch (7); Said upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch (6); Said lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch (7); It is characterized in that: said upper limit inductance near switch (6) comprise upper limit near switch oscillator coil (11) and upper limit near switch output contact (12), said lower limit inductance near switch (7) comprise lower limit near switch oscillator coil (13) and lower limit near switch output contact (14).
A kind of nitric acid tank level detection method may further comprise the steps:
Stainless steel floating ball (5) is connected with stainless steel rope (2) and is suspended on the pulley; The other end of stainless steel rope (2) hangs with metal balance weight (1); Utilize suffered gravity of stainless steel floating ball (2) and buoyancy difference and metal balance weight (1) to balance each other stainless steel floating ball (2) swum on the nitric acid liquid level, therefore have:
W-F=G; Wherein, W is the suffered gravity of stainless steel floating ball (N); G is the gravity (N) of metal balance weight; F is the suffered buoyancy of stainless steel floating ball (N);
When nitric acid liquid level H raise, the suffered buoyancy of stainless steel floating ball (5) increased, then W-F＜G; Original equilibrium relation is destroyed; Stainless steel floating ball moves on (5), and metal balance weight (1) position descends, when W-F=G; Stainless steel floating ball rests on the reposition, and the staff just knows the height of tested nitric acid liquid level according to the position of metal balance weight (1); Vice versa.
A kind of in addition nitric acid tank level detection method may further comprise the steps:
When metal balance weight (1) near the upper limit inductance near switch (6) or lower limit inductance during near switch (7) sensing range, the upper limit inductance makes metal balance weight (1) surface produce eddy current near switch (6) or lower limit inductance near the oscillator coil of switch (7); Eddy current retroaction upper limit inductance changes near switch (6) or the lower limit inductance internal oscillator circuit near switch (7), and internal oscillator circuit output switching value control signal drives auxiliary reclay (KA1, KA2) coil working; Auxiliary reclay (KA1, KA2) coil provides active and passive switching value signal, and can satisfy personnel's on-site manual opertaing device or DCS control system (DIstributed Control System, scattered control system) control needs.
This nitric acid tank level pick-up unit, testing circuit and detection method have following beneficial effect:
(1) the present invention can show according to metal balance weight position owing to the nitric acid tank level at the scene, has solved former nitric acid tank level and has measured with manual work when needed, has unsafe factor and labour's problem.
(2) the present invention is because to adopt electrical equipment to carry out the nitric acid storage tank stores nitric acid of Level Detection up and down safe and reliable, and wiring is simple, can satisfy the device control needs, and hardware facility less input.
Description of drawings
Fig. 1 is the structural representation of nitric acid tank level pick-up unit of the present invention;
Fig. 2 is that the liquid level bound of nitric acid tank level pick-up unit of the present invention detects electrical schematic diagram.
Description of reference numerals:
1-metal balance weight; 2-stainless steel rope; 3-left chain wheel parts; 4-right pulley parts; 5-stainless steel liquid level ball float; 6-upper limit inductance is near switch; 7-lower limit inductance is near switch; 8-nitric acid liquid level; 9-nitric acid storage tank induction pipe; 10-nitric acid storage tank outlet; 11-upper limit is near the switch oscillator coil; 12-upper limit is near the switch output contact; 13-lower limit is near the switch oscillator coil; 14-lower limit is near the switch output contact; 15-upper limit position switch amount active signal; 16-lower position switch amount active signal.
Embodiment
Below in conjunction with Fig. 1 and Fig. 2, the present invention is further specified:
As shown in Figure 1, a kind of nitric acid tank level pick-up unit comprises nitric acid storage tank, nitric acid storage tank induction pipe 9 and nitric acid storage tank outlet 10, on the nitric acid storage tank, is provided with a liquid level detection device.Liquid level detection device comprises metal balance weight 1, stainless steel rope 2, pulley part and stainless steel liquid level ball float 5; It is outside that metal balance weight 1 is positioned at the nitric acid storage tank; Stainless steel liquid level ball float 5 floats on the nitric acid liquid level 8, and metal balance weight 1 and stainless steel liquid level ball float 5 are connected with pulley through stainless steel rope 2.
Pulley comprises left chain wheel parts 3 and right pulley parts 4, and left chain wheel parts 3 are positioned at same surface level with right pulley parts 4, and right pulley parts 4 are positioned at nitric acid storage tank top, and left chain wheel parts 3 are positioned at directly over the metal balance weight 1.
Also comprise the upper limit inductance near switch 6 and lower limit inductance near switch 7, the upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch 6, said lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch 7.
At nitric acid storage tank upper top pulley part is installed, buoyancy weight rope liquid level detection device is installed.And require to illustrate spacing installation site up and down near switch according to tank level.The installation of electrical equipment adopts the PEPPERL FUCHS NJ20+UI+W of two two-wire systems on the storage tank outer wall, to detect the liquid level upper limit and the lower limit that weight moves up and down near switch, and carries out electric appliance circuits according to explosion-proof place electrical safety standard and lay.The electrical equipment degree of protection requires to be IP64.
This nitric acid tank level pick-up unit principle of work is following:
Stainless steel floating ball 5 usefulness stainless steel ropes 2 are connected and are suspended on the pulley; The other end of stainless steel rope 2 hangs with metal balance weight 1; Utilize stainless steel floating ball 2 suffered gravity and buoyancy difference and metal balance weight 1 to balance each other stainless steel floating ball 2 swum on the nitric acid liquid level, therefore have:
W-F=G; Wherein, W is the suffered gravity of stainless steel floating ball; G is the gravity of metal balance weight; F is the suffered buoyancy of stainless steel floating ball;
When nitric acid liquid level H raise, stainless steel floating ball 5 suffered buoyancy increased, then W-F＜G; Original equilibrium relation is destroyed; Move on the stainless steel floating ball 5, metal balance weight 1 position descends, when W-F=G; Stainless steel floating ball rests on the reposition, and the staff just knows the height of tested nitric acid liquid level according to the position of metal balance weight 1; Vice versa.
As shown in Figure 2; A kind of nitric acid tank level testing circuit; Comprise along the nitric acid storage tank move up and down metal balance weight 1, upper limit inductance near switch 6 and lower limit inductance near switch 7; The upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch 6; The lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch 7, the upper limit inductance near switch 6 comprise upper limit near switch oscillator coil 11 and upper limit near switch output contact 12, the lower limit inductance near switch 7 comprise lower limit near switch oscillator coil 13 and lower limit near switch output contact 14.Control and remote auto control by the relevant device on-site manual for on-the-spot can the offering near switching signal of taking place of this nitric acid tank level testing circuit.
This nitric acid tank level testing circuit principle of work is following:
When metal balance weight 1 near the upper limit inductance near switch 6 or lower limit inductance during near switch 7 sensing ranges, the upper limit inductance makes metal balance weight 1 surface produce eddy current near switch 6 or lower limit inductance near the oscillator coil of switch 7; Eddy current retroaction upper limit inductance changes near switch 6 or the lower limit inductance internal oscillator circuit near switch 7, and internal oscillator circuit output switching value control signal drives the auxiliary reclay coil working; The auxiliary reclay coil provides active and passive switching value signal, and can satisfy personnel's on-site manual opertaing device or DCS control system (DIstributed Control System, scattered control system) control needs.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obvious realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all in protection scope of the present invention.
Claims (7)
1. a nitric acid tank level pick-up unit comprises nitric acid storage tank, nitric acid storage tank induction pipe (9) and nitric acid storage tank outlet (10), it is characterized in that: on said nitric acid storage tank, be provided with a liquid level detection device.
2. according to the said nitric acid tank level of claim 1 pick-up unit; It is characterized in that: said liquid level detection device comprises metal balance weight (1), stainless steel rope (2), pulley part and stainless steel liquid level ball float (5); It is outside that metal balance weight (1) is positioned at the nitric acid storage tank; Stainless steel liquid level ball float (5) floats on the nitric acid liquid level (8), and metal balance weight (1) is connected with pulley through stainless steel rope (2) with stainless steel liquid level ball float (5).
3. according to the said nitric acid tank level of claim 2 pick-up unit; It is characterized in that: said pulley comprises left chain wheel parts (3) and right pulley parts (4); Said left chain wheel parts (3) and said right pulley parts (4) are positioned at same surface level; And said right pulley parts (4) are positioned at nitric acid storage tank top, and said left chain wheel parts (3) are positioned at directly over the said metal balance weight (1).
4. according to any one said nitric acid tank level pick-up unit in the claim 1 to 3; It is characterized in that: also comprise the upper limit inductance near switch (6) and lower limit inductance near switch (7); Said upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch (6), and said lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch (7).
5. nitric acid tank level testing circuit; Comprise along the nitric acid storage tank move up and down metal balance weight (1), upper limit inductance near switch (6) and lower limit inductance near switch (7); Said upper limit inductance is arranged on the highest liquid level safety line of nitric acid storage tank place near switch (6); Said lower limit inductance is arranged on nitric acid storage tank minimum liquid level safety line place near switch (7); It is characterized in that: said upper limit inductance near switch (6) comprise upper limit near switch oscillator coil (11) and upper limit near switch output contact (12), said lower limit inductance near switch (7) comprise lower limit near switch oscillator coil (13) and lower limit near switch output contact (14).
6. nitric acid tank level detection method may further comprise the steps:
Stainless steel floating ball (5) is connected with stainless steel rope (2) and is suspended on the pulley; The other end of stainless steel rope (2) hangs with metal balance weight (1); Utilize suffered gravity of stainless steel floating ball (2) and buoyancy difference and metal balance weight (1) to balance each other stainless steel floating ball (2) swum on the nitric acid liquid level, therefore have:
W-F=G; Wherein, W is the suffered gravity of stainless steel floating ball (N); G is the gravity (N) of metal balance weight; F is the suffered buoyancy of stainless steel floating ball (N);
When nitric acid liquid level H raise, the suffered buoyancy of stainless steel floating ball (5) increased, then W-F＜G; Original equilibrium relation is destroyed; Stainless steel floating ball moves on (5), and metal balance weight (1) position descends, when W-F=G; Stainless steel floating ball rests on the reposition, and the staff just knows the height of tested nitric acid liquid level according to the position of metal balance weight (1); Vice versa.
7. nitric acid tank level detection method may further comprise the steps:
When metal balance weight (1) near the upper limit inductance near switch (6) or lower limit inductance during near switch (7) sensing range, the upper limit inductance makes metal balance weight (1) surface produce eddy current near switch (6) or lower limit inductance near the oscillator coil of switch (7); Eddy current retroaction upper limit inductance changes near switch (6) or the lower limit inductance internal oscillator circuit near switch (7), and internal oscillator circuit output switching value control signal drives auxiliary reclay (KA1, KA2) coil working; Auxiliary reclay (KA1, KA2) coil provides active and passive switching value signal, and can satisfy personnel's on-site manual opertaing device or DCS control system (DIstributed Control System, scattered control system) control needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110194922 CN102353422A (en) | 2011-07-13 | 2011-07-13 | Device, circuit and method for detecting liquid level of nitric acid storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110194922 CN102353422A (en) | 2011-07-13 | 2011-07-13 | Device, circuit and method for detecting liquid level of nitric acid storage tank |
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| CN102353422A true CN102353422A (en) | 2012-02-15 |
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| CN 201110194922 Pending CN102353422A (en) | 2011-07-13 | 2011-07-13 | Device, circuit and method for detecting liquid level of nitric acid storage tank |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198011A (en) * | 2014-09-19 | 2014-12-10 | 锡矿山闪星锑业有限责任公司 | Device and method for measuring liquid level of high-temperature melt in metallurgical furnace |
| CN104587887A (en) * | 2015-01-29 | 2015-05-06 | 德清县立荣金属粉末有限公司 | Automatic acid liquid conveying device for acid mixing |
| CN105107314A (en) * | 2015-09-21 | 2015-12-02 | 云南大红山管道有限公司 | Atomizing spray system applied to dust suppression site |
| CN106315698A (en) * | 2015-06-15 | 2017-01-11 | 江苏沃尔特环保有限公司 | Exhaust-type acid and alkali metering tank |
| CN106813752A (en) * | 2015-11-30 | 2017-06-09 | 中国石油天然气股份有限公司 | Liquid level overrun detection system and method |
| CN107389157A (en) * | 2017-08-03 | 2017-11-24 | 西华县明慧无人机销售有限公司 | A kind of dispenser unmanned plane decoction warning device |
| CN109186718A (en) * | 2018-09-27 | 2019-01-11 | 北京众信科源科技有限公司 | A kind of water level sensor |
| CN109398885A (en) * | 2018-10-31 | 2019-03-01 | 郑浩 | It is a kind of to be used to indicate a bottle instruction bottle for vivo environment variation |
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| CN200993812Y (en) * | 2006-12-28 | 2007-12-19 | 高军 | Room door alarm device |
| CN201043910Y (en) * | 2007-06-05 | 2008-04-02 | 永城煤电集团有限责任公司 | Floating liquid level detecting control device |
| CN202188884U (en) * | 2011-07-13 | 2012-04-11 | 云南大红山管道有限公司 | Nitric acid tank liquid level detection device |
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Patent Citations (3)
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| CN200993812Y (en) * | 2006-12-28 | 2007-12-19 | 高军 | Room door alarm device |
| CN201043910Y (en) * | 2007-06-05 | 2008-04-02 | 永城煤电集团有限责任公司 | Floating liquid level detecting control device |
| CN202188884U (en) * | 2011-07-13 | 2012-04-11 | 云南大红山管道有限公司 | Nitric acid tank liquid level detection device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198011A (en) * | 2014-09-19 | 2014-12-10 | 锡矿山闪星锑业有限责任公司 | Device and method for measuring liquid level of high-temperature melt in metallurgical furnace |
| CN104587887A (en) * | 2015-01-29 | 2015-05-06 | 德清县立荣金属粉末有限公司 | Automatic acid liquid conveying device for acid mixing |
| CN106315698A (en) * | 2015-06-15 | 2017-01-11 | 江苏沃尔特环保有限公司 | Exhaust-type acid and alkali metering tank |
| CN105107314A (en) * | 2015-09-21 | 2015-12-02 | 云南大红山管道有限公司 | Atomizing spray system applied to dust suppression site |
| CN106813752A (en) * | 2015-11-30 | 2017-06-09 | 中国石油天然气股份有限公司 | Liquid level overrun detection system and method |
| CN107389157A (en) * | 2017-08-03 | 2017-11-24 | 西华县明慧无人机销售有限公司 | A kind of dispenser unmanned plane decoction warning device |
| CN109186718A (en) * | 2018-09-27 | 2019-01-11 | 北京众信科源科技有限公司 | A kind of water level sensor |
| CN109398885A (en) * | 2018-10-31 | 2019-03-01 | 郑浩 | It is a kind of to be used to indicate a bottle instruction bottle for vivo environment variation |
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Application publication date: 20120215 |