CN214471168U - Negative pressure ash bucket material level detection structure - Google Patents
Negative pressure ash bucket material level detection structure Download PDFInfo
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- CN214471168U CN214471168U CN202120570522.0U CN202120570522U CN214471168U CN 214471168 U CN214471168 U CN 214471168U CN 202120570522 U CN202120570522 U CN 202120570522U CN 214471168 U CN214471168 U CN 214471168U
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Abstract
The utility model discloses a negative pressure ash bucket material level detects structure belongs to power plant equipment technical field. This structure includes ash bucket, negative pressure test assembly, material level recheck subassembly and control assembly, be equipped with material level test assembly in the ash bucket, the ash bucket is inherent to be equipped with the corresponding position of material level test assembly and sweeps the subassembly, the material level rechecks the subassembly and is located outside the ash bucket to be connected with sweeping the subassembly through the pipeline, negative pressure test assembly establishes on material level test assembly, control assembly and negative pressure test assembly and material level test assembly electric connection. Only when the radio frequency admittance material level meter and the negative pressure switch are triggered, the high material level alarm is sent out, the high material level alarm judgment condition is increased, and the probability of false alarm is greatly reduced. After the high material level alarm occurs, a worker stands on the ground to operate the valve A and the valve B, so that the real material level in the ash hopper can be rechecked, the reliability of the detection result is improved, the workload is reduced, and the operation safety is improved.
Description
Technical Field
The utility model relates to a negative pressure ash bucket material level detects structure belongs to power plant equipment technical field.
Background
Along with the gradual strictness of the emission limit value of particulate matters in the emission standard of the atmospheric pollutants of the thermal power plant, the technical level of the dust removal device configured for the coal-fired unit is also upgraded. The stable and efficient operation of the dust remover is not only an important guarantee that the particulate matters in the flue gas are discharged up to the standard, but also a guarantee is provided for the stable up-to-standard operation of the downstream environmental protection equipment. The ash hopper is a key component in the dust remover and collects the particulate matters in the dust removing process. The dust remover which is in working condition for a long time generally works continuously, online chamber-separated dust removal is carried out, a large amount of cleaned dust continuously falls into the dust hopper, the volume of the dust hopper is limited, and therefore the dust hopper must be cleaned before the dust hopper is full of dust. Generally detect the material level in the ash bucket through material level measuring device, material level measuring device has the inserted bar, and the inserted bar falls the ash easily, and after the ash that falls reached certain degree, even if the actual material this moment did not reach the height of reporting to the police, material level measuring device also reported to the police easily, and this wrong report is unfavorable for operations such as operating personnel on-line monitoring, defeated ash, row sediment.
To this end, chinese patent publication No. CN102914345A discloses a level switch, which includes: the material level meter is connected with the storage bin and is used for monitoring the material level in the storage bin; and a purge device which is arranged adjacent to the level gauge and has a structure for purging the level gauge. The material level switch comprises a material level meter and a purging device, the material level meter monitors whether the medium height in the storage bin reaches the warning height and sends out an alarm signal, and the purging device purges the material level meter, so that the material level meter can perform normal functions to perform reliable and accurate detection.
However, the alarm judgment condition is single, and the probability of the occurrence of false alarm is high; in addition, after the material level warning appears at every turn, generally need the staff to climb the actual material level of charge level indicator installation department on the feed bin, work load is big, and has the risk that the staff high altitude falls.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a negative pressure ash bucket material level detection structure.
The utility model discloses a following technical scheme can realize:
the utility model provides a negative pressure ash bucket material level detects structure, includes ash bucket, negative pressure determine module, material level recheck subassembly and control assembly, be equipped with material level determine module in the ash bucket, the ash bucket is inherent to be equipped with the corresponding position of material level determine module and to sweep the subassembly, the material level recheck subassembly is located outside the ash bucket to through the pipeline with sweep the subassembly and be connected, negative pressure determine module establishes on material level determine module, control assembly and negative pressure determine module and material level determine module electric connection.
The material level detection assembly is a radio frequency admittance material level meter.
The purging component is a purging pipe, and one end, far away from the pipeline, of the purging pipe is opposite to the probe rod of the radio frequency admittance material level meter.
The negative pressure detection assembly is a negative pressure switch.
The control component is DCS.
The material level rechecking assembly comprises a compressed air pipe and a valve B which are installed on the pipeline, the compressed air pipe is located between the valve B and the ash bucket, and the valve A is installed on the compressed air pipe.
The beneficial effects of the utility model reside in that:
1. only when the radio frequency admittance material level meter and the negative pressure switch are triggered, the high material level alarm is sent out, the high material level alarm judgment condition is increased, and the probability of false alarm is greatly reduced.
2. After the high material level alarm occurs, a worker stands on the ground to operate the valve A and the valve B, so that the real material level in the ash hopper can be rechecked, the reliability of the detection result is improved, the workload is reduced, and the operation safety is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-ash bucket, 2-material level detection component, 3-purging component, 4-pipeline, 5-valve A, 6-valve B.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in FIG. 1, a negative pressure ash bucket material level detection structure, including ash bucket 1, negative pressure determine module, material level recheck subassembly and control assembly, be equipped with material level determine module 2 in the ash bucket 1, the ash bucket 1 is inherent to be equipped with the corresponding position of material level determine module 2 and to sweep subassembly 3, the material level rechecks the subassembly and is located ash bucket 1 outside to be connected with sweeping subassembly 3 through pipeline 4, negative pressure determine module establishes on material level determine module 2, control assembly and negative pressure determine module and 2 electric connection of material level determine module. When using, detect the material level in the ash bucket 1 through material level determine module 2, detect the negative pressure condition of 2 installations departments of material level determine module through negative pressure determine module, whether the artifical actual material level that further rechecks in the ash bucket 1 through material level recheck subassembly and sweep subassembly 3 reachs the 2 installations departments of material level determine module.
The material level detection component 2 is a radio frequency admittance material level meter.
The purging component 3 is a purging pipe, and one end of the purging pipe, which is far away from the pipeline 4, is opposite to the probe rod of the radio frequency admittance material level meter.
The negative pressure detection assembly is a negative pressure switch.
The control component is DCS.
The material level rechecking assembly comprises a compressed air pipe and a valve B6 which are arranged on the pipeline 4, the compressed air pipe is positioned between the valve B6 and the ash bucket 1, and the compressed air pipe is provided with a valve A5.
Specifically, the height between the valve A5 and the valve B6 and the ground is 1-1.2 m, so that a worker can stand on the ground to operate the valve A5 and the valve B6.
Negative pressure ash bucket material level detect structure, its theory of operation as follows:
the conditions to be met by the high material level alarm are as follows: the radio frequency admittance material level meter and the negative pressure switch are both triggered, namely the material level in the ash bucket 1 is higher than the installation position of the radio frequency admittance material level meter, and the negative pressure switch is covered by ash.
In the initial state, both valve a5 and valve B6 are in a closed state. Under normal conditions, when the material level in the ash bucket 1 is lower than the installation position of the radio frequency admittance material level meter, a probe of the radio frequency admittance material level meter does not touch ash, and the installation position of the radio frequency admittance material level meter has negative pressure, so that high material level alarm cannot be sent out.
When the material level in the ash hopper 1 is higher than the radio frequency admittance material level meter, a probe rod of the radio frequency admittance material level meter touches ash, and a related signal is transmitted to a DCS (distributed control System), so that a first necessary condition of high material level alarm is met; meanwhile, as the material level in the ash hopper 1 is higher than that of the radio frequency admittance material level meter, the negative pressure switch is covered by ash, the installation position of the radio frequency admittance material level meter does not have negative pressure any more, the negative pressure switch acts to meet the second necessary condition, and the DCS sends out a high material level alarm.
After the DCS sends out a high material level alarm, a worker opens a valve A5 to enable a blowing pipe to be filled with compressed air to blow a probe rod of the radio frequency admittance material level meter, and if the action of the radio frequency admittance material level meter is restored to an initial state and the high material level alarm information on the DCS is eliminated, the real material level in the ash hopper 1 does not reach the installation position of the radio frequency admittance material level meter; if the high material level alarm information on the DCS still exists, closing the valve A5, opening the valve B6, checking whether negative pressure exists, namely checking whether external air continuously enters the ash bucket 1 through the pipeline 4, confirming that the real material level in the ash bucket 1 reaches the installation position of the radio frequency admittance material level meter if no negative pressure exists, and indicating that the real material level in the ash bucket 1 is lower than the radio frequency admittance material level meter if negative pressure exists.
Claims (6)
1. The utility model provides a negative pressure ash bucket material level detects structure which characterized in that: including ash bucket (1), negative pressure test subassembly, material level recheck subassembly and control assembly, be equipped with material level test subassembly (2) in ash bucket (1), the position corresponding with material level test subassembly (2) is equipped with sweeps subassembly (3) in ash bucket (1), material level recheck subassembly is located outside ash bucket (1) to be connected with sweeping subassembly (3) through pipeline (4), negative pressure test subassembly establishes on material level test subassembly (2), control assembly and negative pressure test subassembly and material level test subassembly (2) electric connection.
2. The negative pressure ash bucket material level detection structure of claim 1, characterized in that: the material level detection component (2) is a radio frequency admittance material level meter.
3. The negative pressure ash bucket material level detection structure of claim 2, characterized in that: the purging component (3) is a purging pipe, and one end of the purging pipe, which is far away from the pipeline (4), is right opposite to a probe rod of the radio frequency admittance material level meter.
4. The negative pressure ash bucket material level detection structure of claim 1, characterized in that: the negative pressure detection assembly is a negative pressure switch.
5. The negative pressure ash bucket material level detection structure of claim 1, characterized in that: the control component is DCS.
6. The negative pressure ash bucket material level detection structure of claim 1, characterized in that: the material level rechecking assembly comprises a compressed air pipe and a valve B (6) which are installed on a pipeline (4), the compressed air pipe is located between the valve B (6) and an ash bucket (1), and a valve A (5) is installed on the compressed air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120570522.0U CN214471168U (en) | 2021-03-19 | 2021-03-19 | Negative pressure ash bucket material level detection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120570522.0U CN214471168U (en) | 2021-03-19 | 2021-03-19 | Negative pressure ash bucket material level detection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214471168U true CN214471168U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120570522.0U Active CN214471168U (en) | 2021-03-19 | 2021-03-19 | Negative pressure ash bucket material level detection structure |
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| Country | Link |
|---|---|
| CN (1) | CN214471168U (en) |
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2021
- 2021-03-19 CN CN202120570522.0U patent/CN214471168U/en active Active
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