CN87215064U - Negative pressure membrane switch charge level incicator - Google Patents
Negative pressure membrane switch charge level incicator Download PDFInfo
- Publication number
- CN87215064U CN87215064U CN 87215064 CN87215064U CN87215064U CN 87215064 U CN87215064 U CN 87215064U CN 87215064 CN87215064 CN 87215064 CN 87215064 U CN87215064 U CN 87215064U CN 87215064 U CN87215064 U CN 87215064U
- Authority
- CN
- China
- Prior art keywords
- negative pressure
- level
- signal
- transmitting device
- indicator
- Prior art date
- 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 - Lifetime
Links
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a level indicator to measure the material level in negative pressure container, and the level indicator is especially suitable for the level check in the dust remover ash bucket of the coal-fired boiler. The indicator is characterized in that the utility model adopts an elastic membrane as the signal transducer, and the structure is simple to make the transformation and transmission of the negative pressure signal accurate and reliable. The measuring element adopts a conical pipe, and a connection pipe is drilled with a bore which can prevent the material from clogging the measuring element in operation. Accordingly, the indicator improves the reliability to measure the material level. An interlock system controlled by a negative pressure position switch ensures that the indicator does not display error material level in the condition of loss signal.
Description
The utility model belongs to a kind of level measurement instrument, is specially adapted in the coal-burning boiler dust collector ash hopper and the detection with material level in the negative-pressure container.
In the dust collector ash hopper of coal-burning boiler, often adopt the tuning-fork type level-sensing device to measure the height of grey charge level.But this level-sensing device is not suitable for high temperature more than 120 ℃, and the fall material level of grey central area of the large-scale ash bucket of energy measurement not, and maintenance workload is also big.
The purpose of this utility model provides a kind of level-sensing device of measuring coal-burning boiler dust collector ash hopper central area ash charge level height that is best suited for.
Fig. 1 is an installation system schematic diagram of the present utility model.
220V AC power (16) is sent into earth leakage circuit-breaker (18) through power switch (17); zero line in the earth leakage circuit-breaker outlet (19) is connected with the stroke contact of negative pressure travel switch (21), and the phase line in the earth leakage circuit-breaker outlet (20) then inserts a contact of the stoppage in transit indicator lamp (32) on the level-sensing device instrument board, the indicator lamp that puts into operation (31), material level signal lamp (30) and material level signal output terminal (29) respectively.
At furnace shutdown period, when ash bucket (24) inside does not have negative pressure signal to exist, the circuit of negative pressure travel switch (21) conducting stoppage in transit indicator lamp (32) and make this lamp shinny.
At boiler unit run duration, the negative pressure signal of ash bucket inside passes to negative pressure travel switch (21) through negative pressure signal dispatch tube (23), makes the circuit turn-on of the indicator lamp that puts into operation (31) shinny.When the grey charge level in the ash bucket is lower than the end opening of measuring cell (25), negative pressure signal in the ash bucket passes to signal transmitting device (28) through measuring cell and negative pressure signal dispatch tube (26), under the effect of negative pressure, electric contact in the signal transmitting device (28) is off-state, material level signal lamp (30) is not shinny, yet no signal output of material level signal output terminal (29) simultaneously.When grey charge level rises to the end opening that is higher than measuring cell, negative pressure signal in the ash bucket is blocked by the ash material, and the negative pressure signal in the negative pressure signal dispatch tube disappears, and the signal transmitting device is experienced less than negative pressure signal, its inner electric contact is on-state, makes the material level signal lamp shinny.The material level signal output terminal will have the AC signal output of 220V simultaneously, start outer welding system.
On the tube wall of negative pressure signal dispatch tube exit, be drilled with the suction hole (22,27) of a φ 3-8 millimeter, play the balance pipe external and internal pressure and prevent to manage interior stifled ash.
Negative pressure travel switch and signal transmitting device in the utility model are diaphragm switch.
Fig. 2 is the longitudinal sectional view of measuring cell, is a conical pipe.
Fig. 3 is the structure cutaway view of negative pressure travel switch, and 1 is lid among the figure, and 2 is shell, and 3 is fixed contact, 4 is the two-way travel contact, and 5 is insulating support, and 6 is ring-like gland, and 7 is flexible sheet, 8 is the dome shape sheet metal, and 9 is the tower spring, and 15 are negative pressure signal connection short tube.
Fig. 4 is the structure cutaway view of signal transmitting device.1-9 is identical with Fig. 3 among the figure, but 4 be unidirectional stroke contact, and 10 and 13 is filler upper and lower end porous gland, and 11 are ventilative elastic filler, and 12 be set screw, and 14 for regulating nut, and 15 is negative pressure signal connection short tube.Adjust the adjusting nut 14 of signal transmitting device, can change the compaction degree of ventilative filler 11, thereby reach the control signal transmitter purpose of delayed delivery time, can obtain stable output signal.The contrast experiment proves that this time-delay mechanism is more more reliable than the outlet side serial connection time relay at the signal transmitting device.
Experimental rig of the present utility model, the material level that has been used for 410t/h coal-burning boiler electric duster ash bucket detects, and failure-free operation has reached more than 150 days, except that changing indicator lamp, do not have other maintenance works, maintenance cost is few, can be at 0-400 ℃ with interior temperature range operation.
Claims (5)
1, a kind of level meter, be specially adapted to measure the instrument of material level in the coal-burning boiler dust collector ash hopper, by measuring cell (25), negative pressure travel switch (21), signal transmitting device (28), material level signal output terminal (29) and negative pressure signal dispatch tube (23,26) and the circuit Connection Element form, it is characterized in that said measuring cell (25) is a conical pipe, said negative pressure travel switch (Fig. 3) and signal transmitting device (Fig. 4) all have a slice flexible sheet (7) to be sealed on the element cross section in it, and tighten up with ring-like gland (6), this diaphragm is separated into this element closely, following two Room, stroke contact (4) and fixed contact (3) are installed in last chamber, indoor dome shape sheet metal (8) places on the turriform spring (9) down, is connected with a negative pressure signal under the spring base and connects short tube (15).
2, level-sensing device according to claim 1, it is characterized in that indoor stroke contact (4) is two-way, stroke contact (4) top and following a fixed contact (3) arranged all, in the following chamber of negative pressure travel switch, there is a dribbling to have the turriform spring (9) of dome shape sheet metal (8) supporting diaphragm.
3, level-sensing device according to claim 1, it is characterized in that indoor stroke contact (4) is unidirectional, on a fixed contact (3) is arranged, following chamber at the signal transmitting device, except that there being a dribbling to have the turriform spring (9) of dome shape sheet metal (8) supporting the diaphragm, also has a time-delay mechanism in the negative pressure signal connection short tube (15) under spring (9).
4, according to claim 1 or 3 described level-sensing devices, the negative pressure signal that it is characterized in that the signal transmitting device connects and to fill up ventilative in the short tube (15) and rubber-like filler (11), the filler two ends are pressed with cellular gland (10) and (13), wear with set screw (12) at the gland center, regulate by regulating nut (14), to reach the purpose of time-delay.
5, level-sensing device according to claim 1 is characterized in that, is drilled with the suction hole of a φ 3-8 millimeter on the tube wall of exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87215064 CN87215064U (en) | 1987-11-03 | 1987-11-03 | Negative pressure membrane switch charge level incicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87215064 CN87215064U (en) | 1987-11-03 | 1987-11-03 | Negative pressure membrane switch charge level incicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87215064U true CN87215064U (en) | 1988-09-28 |
Family
ID=4829254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87215064 Expired - Lifetime CN87215064U (en) | 1987-11-03 | 1987-11-03 | Negative pressure membrane switch charge level incicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87215064U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167231A (en) * | 2020-01-11 | 2020-05-19 | 天津海运职业学院 | A fuel motor tail gas processing apparatus for boats and ships |
| CN112079075A (en) * | 2020-09-01 | 2020-12-15 | 天津铁厂有限公司 | Method for controlling ash discharge of charge level indicator based on negative pressure drive |
-
1987
- 1987-11-03 CN CN 87215064 patent/CN87215064U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167231A (en) * | 2020-01-11 | 2020-05-19 | 天津海运职业学院 | A fuel motor tail gas processing apparatus for boats and ships |
| CN112079075A (en) * | 2020-09-01 | 2020-12-15 | 天津铁厂有限公司 | Method for controlling ash discharge of charge level indicator based on negative pressure drive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201898085U (en) | Target sheet type flow switch | |
| CN87215064U (en) | Negative pressure membrane switch charge level incicator | |
| CN201302753Y (en) | Vacuum oiling alarm device | |
| CN202267509U (en) | Oil pillow oil level monitoring device for converter transformer | |
| CN2149610Y (en) | Float type liquid level sensing device | |
| CN114188181B (en) | Height switch for aircraft wastewater system | |
| CN208595950U (en) | A kind of hydraulic engineering water-level detecting device | |
| CN210422687U (en) | Automatic water drainage device for gas drainage under negative pressure | |
| CN202836154U (en) | Two-way air pressure type cupola furnace level gage | |
| CN112304395A (en) | Intelligent water level wireless monitoring liquid level meter | |
| CN2376075Y (en) | Water-level alarm switch | |
| CN203205194U (en) | Metal corrugated oil conservator for transformer | |
| CN2114815U (en) | Liquid level display controller | |
| CN2190314Y (en) | Liquid level controller | |
| CN214334392U (en) | Clear stifled structure of boiler bed pressure sampling tube | |
| CN2108282U (en) | Float-type liquid level sensor | |
| CN2278923Y (en) | One-shot measuring spring membrane element charge level meter for flour granary | |
| CN220542173U (en) | Lime bin lime level gauge of desulfurization system | |
| CN216787323U (en) | Automatic pressure compensation sewage discharging system for positive pressure environment | |
| CN217386472U (en) | Intelligent alarm device for acquisition terminal | |
| CN216773132U (en) | Pressure switch for full-automatic uninterrupted safe gas supply cabinet | |
| CN214778232U (en) | Cement overflow device of cement tank | |
| CN202649833U (en) | High-low temperature alternation humidity coldness test box | |
| CN219161409U (en) | Tunnel fire water film forming state automatic detection device | |
| CN210245401U (en) | Timing switch for electronic stop board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |