CN220176244U - Anti-blocking and false-alarm-preventing liquid level alarm device - Google Patents
Anti-blocking and false-alarm-preventing liquid level alarm device Download PDFInfo
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- CN220176244U CN220176244U CN202321742070.5U CN202321742070U CN220176244U CN 220176244 U CN220176244 U CN 220176244U CN 202321742070 U CN202321742070 U CN 202321742070U CN 220176244 U CN220176244 U CN 220176244U
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- liquid level
- alarm
- collecting barrel
- alarm device
- level alarm
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- 239000007788 liquid Substances 0.000 title claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000005406 washing Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims 7
- 239000000779 smoke Substances 0.000 description 14
- 239000004071 soot Substances 0.000 description 10
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 230000003009 desulfurizing effect Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 235000019504 cigarettes Nutrition 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to the field of liquid level detection and discloses an anti-blocking and false-alarm-preventing liquid level alarm device which comprises a collecting barrel, a liquid level alarm, an overflow pipe, a drainage pipe and a filtering piece. The liquid level alarm is arranged at the top of the collecting barrel and is provided with a liquid level detection part and an alarm part, the liquid level detection part stretches into the accommodating space, the overflow pipe is arranged on the side face of the collecting barrel and is communicated with the collecting barrel, the drainage pipe stretches into the liquid, and the filter element is arranged in the collecting barrel. According to the utility model, the liquid level alarm is arranged externally, the liquid level detection part is separated from the drainage tube through the filtering piece, and ash in washing water flowing out of the drainage tube is filtered, so that the situation that false alarm is generated due to failure of the ash caused by adhesion of the ash on the liquid level detection part is avoided, and the liquid level detection part can work normally.
Description
Technical Field
The utility model relates to the field of liquid level detection, in particular to an anti-blocking and false-alarm-preventing liquid level alarm device.
Background
In the operation process of the desulfurizing tower, a large amount of alkaline washing water is sprayed in the desulfurizing tower, sulfur oxides such as sulfur dioxide in flue gas exhausted by a host machine and a generator are absorbed through acid-base neutralization reaction, so that atmospheric pollution is prevented, when the washing water is sprayed into the desulfurizing tower in a large amount, effective measures are taken to ensure that the washing water is smoothly discharged into a washing water cabin, and the situation that the washing water is gathered in the desulfurizing tower, so that a large amount of washing water flows backwards to enter a smoke exhaust pipe and enter a host machine/generator cylinder through the smoke exhaust pipe is prevented, so that power equipment of a ship is damaged is avoided.
In view of the above problems, there are two general approaches: the diameter of the discharge pipe is increased, the discharge pipe is vertically arranged, a valve or the like which possibly causes water flow blockage cannot be arranged on a pipeline, a large amount of discharge water can be naturally discharged through gravity, and washing water is prevented from flowing backwards into the smoke exhaust pipe. The 2 schemes are that liquid level alarm sensors are added on a discharge pipe and a smoke exhaust pipe, the liquid level height is detected in real time in the running process of the system, once the liquid level height exceeds a control range, the running of a washing water pump is stopped immediately, and the running of a host/generator is stopped, so that the phenomenon that washing water flows backwards into the smoke exhaust pipe due to the fact that the liquid level is too high is avoided.
In the two schemes, the scheme 1 is limited by the size of a ship, the size of a discharge pipeline is increased, the vertical arrangement and other requirements are difficult to realize on the ship, and particularly, the prior art of additionally installing a desulfurization system on the operating ship is generally implemented by adopting the scheme 2.
Scheme 2 still has some defects in implementation projects, mainly because the washing water contains a large amount of foam and soot, the foam can cause liquid level sensing distortion in a pipeline, and the soot can cover the position of a sensor probe, so that a sensor alarms by mistake; the utility model is mainly designed for scheme 2, and the problems are avoided by designing a novel structure and scheme.
Disclosure of Invention
The utility model aims to provide an anti-blocking and false-alarm-preventing liquid level alarm device which can prevent soot from covering the position of a probe and ensure the normal operation of a sensor.
In order to achieve the above object, the present utility model provides an anti-blocking and anti-false alarm liquid level alarm device, comprising:
the collecting barrel is internally provided with an accommodating space, and liquid is filled in the accommodating space;
the liquid level alarm is arranged at the top of the collecting barrel, is provided with a liquid level detection part and an alarm part, and the liquid level detection part stretches into the accommodating space and is positioned at a height higher than the liquid level of the liquid;
the overflow pipe is arranged on the side surface of the collecting barrel and is communicated with the collecting barrel, and the liquid level of the liquid is flush with the installation height of the overflow pipe;
the drainage tube stretches into the liquid and is used for introducing washing water into the collecting cylinder, and the inner diameter of the drainage tube is larger than that of the overflow tube;
the filtering piece is arranged in the collecting barrel, the accommodating space in the collecting barrel is divided into two collecting areas, and the liquid level detection part and the drainage tube are respectively positioned in the two collecting areas.
Preferably, the filter element is a filter plate.
Preferably, the filter element is an open-top filter cartridge.
Preferably, the pore diameter of the filtering holes on the filtering piece is 30-60 meshes.
Preferably, the filter element is removably connected to the inside of the collecting vessel 1.
Preferably, the liquid level alarm is a floating ball alarm.
Preferably, the distance from the water outlet of the drainage tube to the water outlet of the overflow tube is larger than the height of millimeter water column corresponding to the exhaust back pressure of the exhaust equipment.
Preferably, the distance between the overflow pipe and the liquid level detection partWherein S is 1 S is the cross-sectional area of the drainage tube 2 For the cross-sectional area of the overflow pipe 3, S 3 And t is the response time of the liquid level alarm in an emergency state, and v is the flow rate of the washing water.
Preferably, the inner diameter of the drainage tube is 3-4 times the inner diameter of the overflow tube.
Preferably, the total height of the anti-blocking and false-alarm-preventing liquid level alarm device is 1-2m.
Based on the prior art, the utility model has the beneficial effects that:
the liquid level alarm is arranged externally, the liquid level detection part is separated from the drainage tube through the filtering piece, soot in washing water flowing out of the drainage tube is filtered, the situation that the soot is attached to the liquid level detection part to cause failure of the soot to generate false alarm is avoided, and the liquid level detection part is guaranteed to work normally.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:
FIG. 1 shows an installation diagram of an anti-blocking and anti-false alarm liquid level alarm device of the present utility model;
FIG. 2 shows a schematic structural diagram of the anti-blocking and anti-false-alarm liquid level alarm device of the utility model;
figure 3 shows a cross-sectional view of the utility model along the A-A plane in figure 2.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
Example 1
Referring to fig. 1 and 2, in order to achieve the above objective, the present utility model provides an anti-blocking and anti-false alarm liquid level alarm device, which comprises a collecting barrel 1, a liquid level alarm 2, an overflow pipe 3, a drainage pipe 4 and a filtering member 5, wherein a containing space is arranged in the collecting barrel 1, and liquid is filled in the containing space, in this embodiment, tap water. The liquid level alarm 2 is arranged at the top of the collecting barrel 1 and is provided with a liquid level detection part 21 and an alarm part 22, wherein the liquid level detection part 21 stretches into the accommodating space and is positioned at a liquid level higher than liquid. The overflow pipe 3 is arranged on the side surface of the collecting barrel 1 and is communicated with the collecting barrel 1, and the liquid level of the liquid is flush with the installation height of the overflow pipe 3. The drainage tube 4 stretches into the liquid for in introducing the wash water into the collection tube 1, the internal diameter of drainage tube 4 is greater than the internal diameter of overflow pipe 3, and filter 5 sets up in collection tube 1, cuts apart into two collecting areas with the accommodation space in the collection tube 1, and liquid level detection portion 21 and drainage tube 4 are located two collecting areas respectively.
Firstly, the anti-blocking and anti-false alarm liquid level alarm device in the embodiment is installed, as shown in fig. 1, one end of a drainage tube 4 is communicated with a water collecting end tube of a desulfurizing tower, and then the drainage tube 4 is inserted into a collecting barrel 1, positioned according to a preset insertion depth, and specifically installed through an external installation frame. The insertion depth can be determined according to the exhaust back pressure of the exhaust device, i.e. the distance h (dimension E in fig. 2) from the water outlet of the draft tube 4 to the water outlet of the overflow tube 3 is greater than the height of the millimeter water column corresponding to the exhaust back pressure of the exhaust device.
In this embodiment, the exhaust device is a hull main machine or a generator. When the desulfurization system is in a normal running state, a certain amount of clean water is poured into the device, the liquid level is always kept at the level with the overflow port, and when the liquid is poured again, the liquid flows out from the overflow pipe 3. At this moment, the flue gas exhausted by the main engine/generator enters the desulfurizing tower through the smoke exhaust pipe, and then the washing water brings the flue gas into the device through the drainage pipe 4, and the distance h from the water outlet of the drainage pipe 4 to the water outlet of the overflow pipe 3 is larger than the height of millimeter water column corresponding to the exhaust back pressure, so that the washing water in the normal operation of the desulfurizing system is effectively prevented from flowing back into the smoke exhaust pipe, and enters the main engine/generator cylinder through the smoke exhaust pipe, thereby damaging the power equipment of the ship, affecting the normal operation of the ship and ensuring the operation safety of the ship.
And when the desulfurization system is in a normal operation state, mixed flue gas, washing water mist, soot and the like in the desulfurization tower are collided and gathered into liquid drops in a flue, a small amount of flue gas can form liquid drops at an inlet section of a smoke exhaust pipe and slowly gather to a water collecting end pipe at a low point of the bottom of the flue along the wall of the flue, the liquid drops are led into the device through a drainage pipe 4, water is slowly accumulated in the collection barrel until reaching the height of an overflow port, washing water flows out from an overflow pipe 3, false alarm cannot occur, and the device has the function of preventing water mist and water drops from slowly flowing into the smoke pipe to be false alarm. When a large amount of washing water flows back into the smoke pipe, the liquid level rises rapidly to trigger an alarm.
In this embodiment, the liquid level alarm 2 may be a float alarm, where a float of the float alarm is disposed in the collecting barrel 1 and above the liquid level. Distance from liquid level (overflow port of overflow pipe 3) to floating ball (liquid level detecting section 21) (dimension D in FIG. 2)Wherein S is 1 For the cross-sectional area of the drainage tube 4, S 2 Is the cross-sectional area of the overflow pipe 3, S 3 For the cross-sectional area of the collecting vessel 1, t is the response time of the level alarm 2 in an emergency situation and v is the flow rate of the wash water. In the present embodiment, the response time of the liquid level alarm 2 is determined according to the type of the floating ball, the flow velocity v=0.5 m/S of the washing water, S 1 ，S 2 ，S 3 All are determined values, and the distance D between the liquid level and the floating ball can be calculated according to the formula. D is the height of a floating ball trigger alarm point of the floating ball liquid level meter from a normal liquid levelThe degree can guarantee that the float ball liquid level alarm can not trigger when the device normally operates to when a large amount of washing water flows backwards and enters the collecting barrel 1, the liquid level can rise rapidly, and the float ball alarm is triggered to alarm, and then the hull host or the engine stops working.
The design height of the collecting vessel 1 in this embodiment (dimension B in fig. 2) is dimension d+dimension e+the float trigger response stroke. In fig. 2, the dimension C is determined according to the purchased dimension of the floating ball alarm and the stroke of the floating ball, so that the floating ball alarm is ensured to be normally installed and used.
The inner diameter of the drainage tube 4 is 3-4 times of the inner diameter of the overflow tube 3. When a large amount of washing water flows back into the smoke exhaust pipe, the washing water is accumulated to the water collecting end pipe at first, then flows into the collecting barrel 1 through the drainage pipe 4, the liquid flowing out speed of the small pipe with the inner diameter of the overflow pipe 3 is low, the inner diameter of the drainage pipe 4 is relatively large, the liquid flowing in speed is high, if a large amount of washing water flows into the collecting barrel 1, the liquid level in the barrel is rapidly increased, the floating ball alarm is triggered to give an alarm, a feedback signal is sent to the desulfurization system and the host/generator controller system, the circulating pump of the desulfurization system is controlled to stop in an emergency, and the host/generator is controlled to stop in an emergency mode, so that more washing water flows back into the host/generator cylinder from the smoke pipe, and serious faults are avoided.
In this embodiment, the filter element 5 is a filter plate, and the aperture of the filter hole on the filter plate is 30-60 meshes. Because the flue gas also contains particles, the particles are condensed along with the water vapor and enter the collecting barrel 1. Because the cigarette ash density is low, gather the liquid top layer easily, and this embodiment especially requires to adopt floater formula liquid level alarm can effectively avoid the cigarette ash to influence, has designed the filter in this embodiment collecting vessel 1 simultaneously, can keep apart cigarette ash and floater formula liquid level alarm, prevents cigarette ash jam alarm, and the filter is for dismantling the connection in collecting vessel 1 moreover, and the crewman can regularly dismantle clearance cigarette ash, has guaranteed the long-term effectively of the device, maintains simple and convenient. In addition, the more suitable filter plate can be adjusted and replaced according to the type of the actual ship combustion oil and the combustion performance of the main engine and the size of the generated smoke.
The overall height (dimension A in figure 2) of the anti-blocking and anti-false liquid level alarm device is 1-2m, generally 1.5m, and the height of the barrel body of the collecting barrel 1 is about 90cm, so that the daily operation of inspection and maintenance is convenient. The anti-blocking and anti-false alarm liquid level alarm device in the embodiment has a simple structure. The device is easy to install, clean and disassemble and can ensure the normal operation of the ship desulfurization system and the normal operation of power equipment in a lower cost mode by additionally installing the device, thereby ensuring the operation benefit of the ship.
Example 2
The present embodiment discloses an anti-clogging and false-alarm-preventing liquid level alarm device, which is substantially the same in structure as in embodiment 1. Except that the filter element 5 is an open-top cartridge.
As shown in fig. 2 and 3, the collecting barrel 1 in this embodiment may be cylindrical or rectangular, taking a cylindrical shape as an example, the filter barrel in this embodiment is semicircular, and as shown in fig. 3, a corresponding semicircular opening is provided at the top of the collecting barrel 1, and when in installation, the semicircular filter barrel can be directly inserted from the semicircular opening, so that the installation is simple and convenient. Therefore, when the filter cartridge is cleaned, the filter cartridge is directly pulled out for cleaning, and ash cannot be adhered to the wall of the collecting barrel 1, so that the cleaning is more convenient.
Based on the prior art, the utility model has the beneficial effects that:
the liquid level alarm 2 is arranged externally, the liquid level detection part 21 is separated from the drainage tube 4 through the filter element 5, soot in washing water flowing out of the drainage tube 4 is filtered, the condition that the soot is attached to the liquid level detection part 21 to cause failure of the soot to generate false alarm is avoided, and the liquid level detection part 21 is ensured to work normally.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.
Claims (10)
1. An anti-blocking and false alarm prevention liquid level alarm device, comprising:
the collecting barrel is internally provided with an accommodating space, and liquid is filled in the accommodating space;
the liquid level alarm is arranged at the top of the collecting barrel, is provided with a liquid level detection part and an alarm part, and the liquid level detection part stretches into the accommodating space and is positioned at a height higher than the liquid level of the liquid;
the overflow pipe is arranged on the side surface of the collecting barrel and is communicated with the collecting barrel, and the liquid level of the liquid is flush with the installation height of the overflow pipe;
the drainage tube stretches into the liquid and is used for introducing washing water into the collecting cylinder, and the inner diameter of the drainage tube is larger than that of the overflow tube;
the filtering piece is arranged in the collecting barrel, the accommodating space in the collecting barrel is divided into two collecting areas, and the liquid level detection part and the drainage tube are respectively positioned in the two collecting areas.
2. The anti-clogging false alarm prevention liquid level alarm device of claim 1 wherein said filter member is a filter plate.
3. The anti-clogging false alarm prevention liquid level alarm device as claimed in claim 1 wherein said filter member is an open top filter cartridge.
4. A tamper-evident liquid level alarm device as claimed in any one of claims 1 to 3, wherein the filter element has a filter aperture of 30 to 60 mesh.
5. A tamper-proof false alarm prevention liquid level alarm device according to any one of claims 1-3, wherein said filter element is detachably connected to the inside of said collecting vessel 1.
6. The anti-clogging anti-false alarm liquid level alarm device of claim 1, wherein the liquid level alarm is a float alarm.
7. The anti-clogging false alarm prevention liquid level alarm device as claimed in claim 1, wherein a distance from a water outlet of the draft tube to a water outlet of the overflow tube is greater than a height of a millimeter water column corresponding to an exhaust back pressure of the exhaust equipment.
8. The anti-clogging false alarm prevention liquid level alarm device as claimed in claim 1, wherein a distance between the overflow pipe and the liquid level detection portionWherein S1 is the cross-sectional area of the drainage tube, S2 is the cross-sectional area of the overflow pipe 3, S3 is the cross-sectional area of the collecting barrel, t is the response time of the liquid level alarm in an emergency state, and v is the flow rate of washing water.
9. The anti-clogging false alarm prevention liquid level alarm device as claimed in claim 1, wherein the inner diameter of the drain pipe is 3-4 times the inner diameter of the overflow pipe.
10. The anti-clogging anti-false alarm liquid level alarm device as claimed in claim 1, wherein the overall height of the anti-clogging anti-false alarm liquid level alarm device is 1-2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742070.5U CN220176244U (en) | 2023-07-05 | 2023-07-05 | Anti-blocking and false-alarm-preventing liquid level alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742070.5U CN220176244U (en) | 2023-07-05 | 2023-07-05 | Anti-blocking and false-alarm-preventing liquid level alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220176244U true CN220176244U (en) | 2023-12-15 |
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ID=89109339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321742070.5U Active CN220176244U (en) | 2023-07-05 | 2023-07-05 | Anti-blocking and false-alarm-preventing liquid level alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220176244U (en) |
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2023
- 2023-07-05 CN CN202321742070.5U patent/CN220176244U/en active Active
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