CN211477495U - Automatic pressure measuring point purging device - Google Patents
Automatic pressure measuring point purging device Download PDFInfo
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- CN211477495U CN211477495U CN202020542975.8U CN202020542975U CN211477495U CN 211477495 U CN211477495 U CN 211477495U CN 202020542975 U CN202020542975 U CN 202020542975U CN 211477495 U CN211477495 U CN 211477495U
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Abstract
The utility model relates to an automatic device that sweeps of pressure measurement station. The traditional pressure transmitter often causes measurement inaccuracy due to unclogging or blockage of a sampling probe. The utility model discloses the constitution includes: pressure transmitter (18), pressure transmitter is connected with low pressure side port valve (1), the one end of high pressure side port valve (2) through the pipeline respectively, the low pressure side port valve other end is connected with balanced valve (12), low pressure by-pass valve (9), low pressure side service valve A (3) through the pipeline respectively, low pressure side service valve A is connected with low pressure side solenoid valve (13), low pressure side solenoid valve is connected with low pressure side service valve C (7), low pressure side service valve C passes through pipeline connection sampling point A (15) with low pressure by-pass valve, low pressure side solenoid valve is connected with low pressure side service valve B (5), low pressure side service valve B passes through the pipeline and is connected with sweep air supply main gas valve (11), sweep air supply main gas valve connection sweep air supply. The automatic purging device is used for the pressure measuring point.
Description
The technical field is as follows:
the utility model relates to a thermal power technology field, concretely relates to automatic device that sweeps of pressure measurement station.
Background art:
the accuracy of boiler air volume measurement points of a thermal power plant is directly related to the safety and the economical efficiency of boiler operation, but the pipe diameters of sampling pipelines of the air volume measurement points are small, and the traditional pressure transmitter often causes measurement inaccuracy due to unsmooth or blockage of a sampling probe. The sampling probe and the transmitter are required to be disassembled and blown every time, the working environment of the sampling probe and the pressure transmitter is severe, and the sampling position is not favorable for maintenance work; at least two persons are matched to open the sampling pipe joint every time the sampling pipe joint is disassembled, blown and reassembled, external compressed air is used for manually blowing the whole sampling pipeline, the working efficiency is seriously influenced, the discontinuity of measurement is caused, and the online monitoring of operators is not facilitated;
in the actual operation of a power plant boiler, the problem that sampling pipes are easy to block due to the fact that the sampling pipe diameters of pressure measuring points are small is solved, manual purging is needed to be carried out on site manually in order to solve the blocking problem and obtain real monitoring data, in order to solve the problem, a solenoid valve and a relay are additionally arranged at a pressure transmitter protection cabinet, and automatic purging of the pressure measuring points is achieved through DCS control logic.
The utility model has the following contents:
the utility model aims at providing an automatic device that sweeps of pressure measurement station.
The above purpose is realized by the following technical scheme:
the utility model provides a pressure measurement station automatic purging device which constitutes includes: the pressure transmitter is respectively connected with one end of a low-pressure side port valve and one end of a high-pressure side port valve through pipelines, the other end of the low-pressure side port valve is respectively connected with a balance valve, a low-pressure bypass valve and a low-pressure side maintenance valve A through pipelines, the low-pressure side maintenance valve A is connected with a low-pressure side electromagnetic valve, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve C, the low-pressure side maintenance valve C and the low-pressure bypass valve are connected with a sampling point A through pipelines, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve B, the low-pressure side maintenance valve B is connected with a purging gas source main gas valve through a pipeline, and the purging gas source main gas valve is connected with a purging gas source.
The other end of the high-pressure side port valve is respectively connected with the balance valve, the high-pressure side bypass valve and the high-pressure side maintenance valve B through pipelines, the high-pressure side maintenance valve B is connected with the high-pressure side electromagnetic valve, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve C, the high-pressure side maintenance valve C and the high-pressure side bypass valve are connected with the sampling point B through pipelines, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve A, and the high-pressure side maintenance valve A is connected with the purging gas source main gas valve through a pipeline.
The automatic pressure measuring point purging device is characterized in that the low-pressure side electromagnetic valve and the high-pressure side electromagnetic valve are three-position five-way electromagnetic valves, the balance valve is a two-position two-way electromagnetic valve, and the pipelines are all made of stainless steel pipes.
Has the advantages that:
1. the utility model relates to an automatic device that sweeps of pressure measurement station, this structure mainly is through installing solenoid valve, a two solenoid valves that have increased two tribit five-way, a two air solenoid valve and a set of height, low pressure side maintenance valve etc. between the sampling device and the pressure transmitter of thermal power factory boiler amount of wind measurement station, has solved traditional pressure transmitter and has often caused the unsafe problem of measurement because of sampling probe is obstructed or block up.
The utility model discloses can make measurement station jam number of times and frequency greatly reduced, reduce the potential safety hazard, can sweep on line and save a large amount of manpower and materials, provide more real measured data for the system, make equipment operation stable, reliable, improve the accuracy increase operational reliability of ordinary supervision measurement station.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows:
example 1:
the utility model provides a pressure measurement station automatic purging device which constitutes includes: the pressure transmitter 18 is connected with one end of a low-pressure side port valve 1 and one end of a high-pressure side port valve 2 through pipelines respectively, the other end of the low-pressure side port valve is connected with a balance valve 12, a low-pressure bypass valve 9 and a low-pressure side maintenance valve A3 through pipelines respectively, the low-pressure side maintenance valve A is connected with a low-pressure side electromagnetic valve 13, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve C7, the low-pressure side maintenance valve C and the low-pressure bypass valve are connected with a sampling point A15 through pipelines, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve B5, the low-pressure side maintenance valve B is connected with a purging gas source main gas valve 11 through a pipeline, and the purging gas source main gas valve is connected with a purging gas source 17.
Example 2:
according to the automatic purging device for the pressure measuring point in the embodiment 1, the other end of the high-pressure side port valve is respectively connected with the balance valve, the high-pressure bypass valve 10 and the high-pressure side maintenance valve B6 through pipelines, the high-pressure side maintenance valve B is connected with the high-pressure side electromagnetic valve 14, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve C8, the high-pressure side maintenance valve C is connected with the high-pressure bypass valve through a pipeline to form a sampling point B16, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve A4, and the high-pressure side maintenance valve A is connected with the purging air source main air valve through a pipeline.
Example 3:
according to the automatic purging device for the pressure measuring points in the embodiment 2, the low-pressure side electromagnetic valve and the high-pressure side electromagnetic valve adopt three-position five-way electromagnetic valves, the balance valve adopts two-position two-way air electromagnetic valves, and pipelines all adopt stainless steel pipes;
according to the working state of the automatic pressure measuring point purging device, after a measuring pipeline is used for a section, the inner wall of the pipeline is easy to scale, the drift diameter of the pipeline is reduced, blockage is easy to cause, scaling is more and more serious along with the lapse of time, and frequent purging can cause poor sealing at a joint of a transmitter; in a normal measurement state, the left coil of the low-pressure side electromagnetic valve is electrified B1 and is communicated with an A1 air source pipeline, and the right coil of the high-pressure side electromagnetic valve is electrified B2 and is communicated with an A2 air source pipeline; when the periodic purging time or the side point blockage needs purging, the coil of the No. 12 two-way electromagnetic valve is electrified, the balance valve is opened to protect the pressure transmitter, the purging compressed air is introduced into the coils with electrification C1 and A1 on the right side of the low pressure side, and the purging compressed air is introduced into the coils with electrification C2 and A2 on the left side of the high pressure side, so that the purpose of preventing blockage of a measuring point is achieved. When the low-pressure side electric valve is in failure, the No. 3, 5 and 7 valves are closed, and the No. 9 bypass valve is opened; when the high-pressure side electromagnetic valve is in failure, the No. 4, 6 and 8 valves are closed, and the No. 10 bypass valve is opened; the failed electromagnetic valve can be replaced, so that the measurement continuity is reduced, and the stability of the running equipment is improved;
the specific implementation mode is as follows: according to the installation mode shown in the attached figure 1, a balance valve, a stop valve (an overhaul valve, a port valve and the like), an electromagnetic valve, a phi 16 stainless steel instrument tube and a stainless steel pipeline are added between a pressure transmitter and a sampling measuring point, the miscellaneous compressed air of about 0.6MP is taken, the pressure sensor is sent to a pressure measuring point through a phi 16 stainless steel instrument tube, a 220V independent power supply is taken from electronics as a power supply of an electromagnetic valve, DI and DO clamping pieces are added from DCS, a cable is laid from an I/O channel of the clamping piece to a local purging DEVICE, the control of each electromagnetic valve of the purging DEVICE is realized by mainly utilizing a MASTER SEQUENCER module and a DEVICE SEQUENCER module in the DCS to carry out step operation, and then the automatic purging function is realized, the automatic purging device for the pressure measuring points can be put into an automatic mode, automatic purging is set to be performed every 12 hours, if a single pressure measuring point is blocked, the automatic mode can be exited, and a switch instruction is manually sent to perform purging independently.
Claims (3)
1. The utility model provides a pressure measurement station automatic purging device which constitutes includes: pressure transmitter, characterized by: the pressure transmitter is respectively connected with one end of a low-pressure side port valve and one end of a high-pressure side port valve through pipelines, the other end of the low-pressure side port valve is respectively connected with a balance valve, a low-pressure bypass valve and a low-pressure side maintenance valve A through pipelines, the low-pressure side maintenance valve A is connected with a low-pressure side electromagnetic valve, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve C, the low-pressure side maintenance valve C and the low-pressure bypass valve are connected with a sampling point A through pipelines, the low-pressure side electromagnetic valve is connected with a low-pressure side maintenance valve B, the low-pressure side maintenance valve B is connected with a purging gas source main gas valve through a pipeline, and the purging gas source main gas valve is connected with a purging.
2. The automatic pressure measuring point purging device as claimed in claim 1, wherein: the other end of the high-pressure side port valve is connected with the balance valve, the high-pressure side bypass valve and the high-pressure side maintenance valve B through pipelines respectively, the high-pressure side maintenance valve B is connected with the high-pressure side electromagnetic valve, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve C, the high-pressure side maintenance valve C and the high-pressure side bypass valve are connected with the sampling point B through pipelines, the high-pressure side electromagnetic valve is connected with the high-pressure side maintenance valve A, and the high-pressure side maintenance valve A is connected with the purging air source main air valve through pipelines.
3. The automatic pressure measuring point purging device as claimed in claim 1, wherein: the low pressure side electromagnetic valve and the high pressure side electromagnetic valve adopt three-position five-way electromagnetic valves, the balance valve adopts two-position two-way electromagnetic valves, and the pipelines all adopt stainless steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542975.8U CN211477495U (en) | 2020-04-14 | 2020-04-14 | Automatic pressure measuring point purging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542975.8U CN211477495U (en) | 2020-04-14 | 2020-04-14 | Automatic pressure measuring point purging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477495U true CN211477495U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020542975.8U Expired - Fee Related CN211477495U (en) | 2020-04-14 | 2020-04-14 | Automatic pressure measuring point purging device |
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| CN (1) | CN211477495U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709290A (en) * | 2020-12-11 | 2021-04-27 | 华帝股份有限公司 | Sleeve type wall-mounted furnace bathroom pipeline cleaning control method and wall-mounted furnace |
-
2020
- 2020-04-14 CN CN202020542975.8U patent/CN211477495U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709290A (en) * | 2020-12-11 | 2021-04-27 | 华帝股份有限公司 | Sleeve type wall-mounted furnace bathroom pipeline cleaning control method and wall-mounted furnace |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 Termination date: 20210414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |