CN219434141U - Boiler induced air volume measuring device with automatic purging function - Google Patents
Boiler induced air volume measuring device with automatic purging function Download PDFInfo
- Publication number
- CN219434141U CN219434141U CN202320048324.7U CN202320048324U CN219434141U CN 219434141 U CN219434141 U CN 219434141U CN 202320048324 U CN202320048324 U CN 202320048324U CN 219434141 U CN219434141 U CN 219434141U
- Authority
- CN
- China
- Prior art keywords
- pressure
- blocking sampler
- boiler
- guiding pipe
- air
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a boiler induced draft air volume measuring device with an automatic purging function, which belongs to the technical field of measuring instruments and comprises: the device comprises a first anti-blocking sampler, a second anti-blocking sampler, an electromagnetic valve, an air source conveying pipeline, a pressure guiding pipe, a differential pressure transmitter and a controller; one end of the pressure guiding pipe is communicated with a boiler induced air pipeline, the other end of the pressure guiding pipe is connected with a differential pressure transmitter, and the pressure guiding pipe is used for transmitting boiler induced air to the differential pressure transmitter for measurement; the input end of the pressure guiding pipe is provided with a first anti-blocking sampler, and the output end of the pressure guiding pipe is provided with a second anti-blocking sampler; when the measurement difference value of the first anti-blocking sampler and the second anti-blocking sampler exceeds a set threshold value, the controller controls the valve core of the electromagnetic valve to switch the air source conveying pipeline, and controls the air source output to purge the anti-blocking sampler; the dust in the pressure guiding pipe is ensured to be free from residue, and the measurement accuracy is improved; the condition that the induced air volume measurement is inaccurate due to more medium dust is reduced, and the measurement replacement is stable and reliable.
Description
Technical Field
The utility model belongs to the technical field of measuring instruments, and particularly relates to a boiler induced draft air quantity measuring device with an automatic purging function.
Background
In the measurement of the index of the induced air quantity of the boiler, a stainless steel induced pressure pipe is generally adopted to be directly connected with a differential pressure transmitter, the positive pressure chamber and the negative pressure chamber of the differential pressure transmitter are used for obtaining corresponding differential pressure values by sensing the air quantity through a sensor diaphragm, and the DCS realizes the corresponding induced air quantity according to the conversion of a calculation book of the pressure taking device. The device for measuring the air quantity of the induced draft fan of the boiler adopts a matrix flowmeter, when fluid flows through a throat diameter pipe according to a Bernoulli equation and a fluid dynamics principle, the fluid flows to a diffusion angle through a shrinkage orifice throat, and the flow velocity of the fluid at the throat is rectified and amplified through the diffusion absorption effect of the diffusion angle, so that the flow velocity of the fluid at the throat is greatly improved, and the static pressure at the throat is obviously reduced; thus, the differential pressure between the full pressure intensity and the negative pressure intensity is amplified, and the actual air quantity can be accurately measured through differential pressure measurement. It is suitable for clean, dust-free media such as: measuring the pressure of medium such as instrument gas, nitrogen and the like; however, if more dust exists in the measuring medium, dust is accumulated in the pressure guiding pipe, so that the pressure guiding pipe is blocked, and the measurement of the induced air quantity is inaccurate. Therefore, how to avoid the influence of dust on the measurement of the induced draft of the boiler is a technical problem to be solved.
Disclosure of Invention
In order to solve the above problems, according to some embodiments, the present utility model adopts the following technical solutions: a boiler induced draft air volume measuring device with automatic purging function, comprising: the device comprises a first anti-blocking sampler, a second anti-blocking sampler, an electromagnetic valve, an air source conveying pipeline, a pressure guiding pipe, a differential pressure transmitter and a controller;
one end of the pressure guiding pipe is communicated with a boiler induced air pipeline, the other end of the pressure guiding pipe is connected with a differential pressure transmitter, and the pressure guiding pipe is used for transmitting boiler induced air to the differential pressure transmitter for measurement; the input end of the pressure guiding pipe is provided with a first anti-blocking sampler, and the output end of the pressure guiding pipe is provided with a second anti-blocking sampler;
the controller is connected with the electromagnetic valve, the electromagnetic valve is arranged on the air source conveying pipeline, and the air source conveying pipeline is communicated with the first anti-blocking sampler and the second anti-blocking sampler; when the measurement difference value of the first anti-blocking sampler and the second anti-blocking sampler exceeds a set threshold value, the controller controls the valve core of the electromagnetic valve to switch the air source conveying pipeline, and controls the air source output to purge the anti-blocking sampler.
Further, the measuring end of the first anti-blocking sampler is arranged at the positive and negative connecting terminals of the pressure guiding pipe and used for detecting the inlet air quantity of the pressure guiding pipe.
Further, the measuring section of the second anti-blocking sampler is arranged at the positive connection terminal and the negative connection terminal of the differential pressure transmitter and used for detecting the outlet air quantity of the pressure guiding pipe.
Further, the set threshold is 5 to 10 percent of the air volume.
Further, the electromagnetic valve comprises an electromagnetic coil, an electromagnetic valve body, a valve core, a valve seat sealing gasket, an O-shaped ring and a valve seat, wherein the electromagnetic coil is arranged at the top of the electromagnetic valve body, the valve core is arranged at the bottom of the electromagnetic valve body, the valve core is sealed through the valve core sealing gasket and the O-shaped ring, and the valve seat is arranged at the bottom of the valve core.
Further, an opening A is formed in the left side of the valve core, an opening B is formed in the right side of the valve core, and the opening A and the opening B are arranged on an air source conveying pipeline.
Furthermore, the electromagnetic valve is mounted on the top surface of the electromagnetic valve body through a bolt, so that 360-degree rotation is realized.
Further, the first anti-blocking sampler and the second anti-blocking sampler have the same structure and comprise a sampler body, a purging ball valve and a wind pressure measuring ball valve, an output port of the electromagnetic valve is connected with the purging port, and the wind pressure measuring port is connected with a positive pressure chamber and a negative pressure chamber of the differential pressure transmitter.
Furthermore, the differential pressure transmitter is provided with 2 pressure interfaces, which are divided into a positive pressure end and a negative pressure end, and the pressure of the positive pressure end is larger than the pressure of the negative pressure section.
Furthermore, the controller adopts a DCS system, the DCS system comprises an upper computer and a test output and input cabinet, and the state parameters of the DCS system are obtained through an I/O module of the test output and input cabinet and a DCS docking network communication module and then reported to the upper computer.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, an anti-blocking sampler is respectively added at the positive and negative connection terminals of the pressure guiding pipe and the differential pressure transmitter, a set of instrument air source automatic blowing and sweeping device is further added, the on-off air source of the electromagnetic valve is controlled by an output signal after DCS logic judgment to sweep the pressure guiding pipe, so that no dust residue in the pressure guiding pipe is ensured, and the measurement accuracy is improved.
2. The boiler air quantity is transmitted to the anti-blocking sampler through the pressure guiding pipe and then is connected to the differential pressure transmitter through the stainless steel pipe, the pressure sensor is strained to be 4-20 mA standard signals, the pressure sensor is transmitted to the DCS analog quantity input clamping piece through the computer cable, the DCS system is configured to display corresponding air quantity values, the air quantity is set to alarm values, when the air quantity alarm values are exceeded, the DCS system outputs switching quantity signals to control the solenoid valve coil to be powered on and powered off, after the solenoid valve coil is powered on, the valve core switches the air path to control the air source to output so as to purge the anti-blocking sampler, accumulated dust is blown back to the boiler air quantity pressure guiding point along the pressure guiding pipe, the solenoid valve coil is powered off, the valve core reset air source stops outputting, the condition that the air quantity measurement of the induced air quantity is inaccurate due to more medium dust is reduced, and the measurement replacement is stable and reliable.
Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
Fig. 1 is a schematic structural diagram of a boiler induced draft air volume measuring device with an automatic purging function according to a first embodiment;
FIG. 2 is a schematic structural diagram of a solenoid valve body according to a first embodiment;
FIG. 3 is a schematic diagram illustrating an installation of an anti-blocking sampler according to a first embodiment;
FIG. 4 is a schematic diagram of an anti-blocking sampler according to a first embodiment;
wherein: 1. an electromagnetic coil; 2. an electromagnetic valve body; 3. a valve core; 4. a valve seat gasket; 5. an O-ring; 6. a valve seat; 7. a valve; 8. an anti-blocking sampler; 9. a process pipe; 81. a purge port; 82. a wind pressure port; 83. ball valve.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiment one:
according to the prior art requirement and on-site working condition, the stainless steel pressure guiding pipe is directly connected with the differential pressure transmitter, dust in the medium is more, the pressure guiding pipe is blocked, and the induced air volume measurement is inaccurate. The device aims to reduce the influence of dust in a medium on the measurement of the induced air quantity of the boiler and improve the accuracy of the measurement of the air quantity.
As shown in fig. 1, the embodiment provides a boiler induced draft air volume measuring device with an automatic purging function, which comprises a first anti-blocking sampler, a second anti-blocking sampler, an electromagnetic valve, a pressure guiding pipe, a differential pressure transmitter and a controller;
one end of the pressure guiding pipe is communicated with a boiler induced air pipeline, the other end of the pressure guiding pipe is connected with a differential pressure transmitter, and the pressure guiding pipe is used for transmitting boiler induced air to the differential pressure transmitter for measurement; the input end of the pressure guiding pipe is provided with a first anti-blocking sampler, and the output end of the pressure guiding pipe is provided with a second anti-blocking sampler;
when the measured difference value of the first anti-blocking sampler and the second anti-blocking sampler exceeds a set threshold value, the controller controls the valve core of the electromagnetic valve to switch the gas path, the gas source comes from the gas source buffer tank of the utility air compression station instrument, the output pressure of the gas source is stabilized at 0.7MPa, and the gas source is conveyed to the electromagnetic valve through a pipeline to control the output of the gas source to purge the anti-blocking sampler.
As an implementation mode, the measuring end of the first anti-blocking sampler is arranged at the positive and negative connecting terminals of the pressure guiding pipe and used for detecting the inlet air quantity of the pressure guiding pipe, the measuring section of the second anti-blocking sampler is arranged at the positive and negative connecting terminals of the differential pressure transmitter and used for detecting the outlet air quantity of the pressure guiding pipe, the difference value between the inlet air quantity and the outlet air quantity exceeds a set threshold value, the DCS system outputs a switching value signal to control the solenoid valve coil to be powered on and powered off, and the valve core is switched to control the air source output to purge the anti-blocking sampler after the solenoid valve coil is powered on.
As one implementation mode, the electromagnetic valve is communicated with an air source conveying pipeline, and the utility air compression station instrument buffer tank conveys a stable air source of 0.7MPa through a pipeline.
Specifically, if the difference value of the measured values of the first anti-blocking sampler and the second anti-blocking sampler exceeds a set threshold value, the anti-blocking sampler is purged through controlling the air source output, accumulated dust is purged back to the induced air volume pressure sampling point of the boiler along the induced pressure pipe, and the blockage caused by dust accumulation in the induced pressure pipe is avoided. The set threshold is 5 to 10 percent of the air volume, preferably 5 percent of the air volume.
As one implementation mode, the differential pressure transmitter is connected with the controller through a signal wire to measure a differential pressure value, the differential pressure transmitter converts the differential pressure value into an air volume value and transmits the air volume value to the controller through a 0-10V or 4-20 mA signal, the differential pressure transmitter is provided with 2 pressure interfaces which are divided into a positive pressure end and a negative pressure end, the pressure of the positive pressure end is larger than the pressure of the negative pressure section, and a 3051CD differential pressure transmitter can be adopted.
As an implementation mode, the electromagnetic valve comprises an electromagnetic coil 1, an electromagnetic valve body 2, a valve core 3, a valve seat sealing gasket 4, an O-shaped ring 5 and a valve seat 6, wherein the electromagnetic coil is arranged at the top of the electromagnetic valve body, the valve core 3 is arranged at the bottom of the electromagnetic valve body, the valve core 3 is sealed through the valve core sealing gasket 4 and the O-shaped ring 5, the valve seat 6 is arranged at the bottom of the valve core 3, an A port is arranged at the left side of the valve core, a B port is arranged at the right side of the valve core, and the A port and the B port are arranged on an air source conveying pipeline; the electromagnetic valve is mounted on the top surface of the electromagnetic valve body through a bolt, and 360-degree rotation is achieved.
The controller adopts a DCS system, the DCS system is a distributed control system, a microprocessor is used as a basis, and the instrument control system which has the advantages of distributed control functions, centralized display operation and design principles of division, autonomy and comprehensive coordination is adopted; the main controller is used for dividing the test signal into an I/O module transmission signal for test and a network transmission signal for test, transmitting the I/O module transmission signal for test to the I/O module of the DCS system through hard wiring of the I/O module, transmitting the network transmission signal for test to the network communication module of the DCS system through optical fibers of the DCS docking network communication module, and after the test signal is transmitted, enabling the main controller of the DCS system to acquire the test signal through the I/O module and the network communication module respectively, and modifying IO variables of the main controller of the DCS system according to the test signal; the main controller is also used for obtaining the state parameters of the DCS system through the I/O module of the test output input cabinet and the DCS docking network communication module respectively and reporting the state parameters to the upper computer after the DCS system feeds back and forms the state parameters.
The first anti-blocking sampler and the second anti-blocking sampler have the same structure and comprise a sampler body, a purging ball valve and a wind pressure measuring ball valve, wherein an output port of the electromagnetic valve is connected with the purging port, and the wind pressure measuring port is connected with a positive pressure chamber and a negative pressure chamber of the differential pressure transmitter.
According to the embodiment, an anti-blocking sampler is respectively added at the positive and negative connection terminals of the pressure guiding pipe and the differential pressure transmitter, a set of instrument air source automatic blowing and sweeping device is further added, the on-off air source of the electromagnetic valve is controlled to sweep the pressure guiding pipe through output signals after DCS logic judgment, no residue of dust in the pressure guiding pipe is ensured, and measurement accuracy is improved; the device reduces the inaccurate induced air volume measurement caused by more medium dust, and ensures that the measurement is stable and reliable.
The boiler air quantity is transmitted to an anti-blocking sampler through a pressure guiding pipe, the anti-blocking sampler is connected to a differential pressure transmitter through a stainless steel pipe, the strain of a pressure sensor is 4-20 mA standard signals, the anti-blocking sampler is transmitted to a DCS analog quantity input clamping piece through an electric cable, the DCS system is configured to display a corresponding air quantity value, an air quantity setting alarm value is achieved, when the air quantity alarm value is exceeded, the DCS system outputs a switching value signal to control an electromagnetic valve coil to obtain power and lose electricity, after the electromagnetic valve coil is obtained, a valve core switches an air circuit to control an air source to output to purge the anti-blocking sampler, accumulated dust is blown back to an air quantity pressure sampling point of the boiler along the pressure guiding pipe, the electromagnetic valve coil loses electricity, and the valve core resets the air source to stop outputting.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (10)
1. The utility model provides a boiler induced air amount of wind measuring device with automatic blowing function which characterized in that includes: the device comprises a first anti-blocking sampler, a second anti-blocking sampler, an electromagnetic valve, an air source conveying pipeline, a pressure guiding pipe, a differential pressure transmitter and a controller;
one end of the pressure guiding pipe is communicated with a boiler induced air pipeline, the other end of the pressure guiding pipe is connected with a differential pressure transmitter, and the pressure guiding pipe is used for transmitting boiler induced air to the differential pressure transmitter for measurement; the input end of the pressure guiding pipe is provided with a first anti-blocking sampler, and the output end of the pressure guiding pipe is provided with a second anti-blocking sampler;
the controller is connected with the electromagnetic valve, the electromagnetic valve is arranged on the air source conveying pipeline, and the air source conveying pipeline is communicated with the first anti-blocking sampler and the second anti-blocking sampler; when the measurement difference value of the first anti-blocking sampler and the second anti-blocking sampler exceeds a set threshold value, the controller controls the valve core of the electromagnetic valve to switch the air source conveying pipeline, and controls the air source output to purge the anti-blocking sampler.
2. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 1, wherein the measuring end of the first anti-blocking sampler is arranged at the positive connecting terminal and the negative connecting terminal of the induced draft tube and is used for detecting the inlet air quantity of the induced draft tube.
3. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 1, wherein the measuring section of the second anti-blocking sampler is arranged at a positive connection terminal and a negative connection terminal of a differential pressure transmitter and is used for detecting the outlet air quantity of the induced draft tube.
4. The apparatus for measuring the induced draft air volume of a boiler with an automatic purging function according to claim 1, wherein the set threshold value is 5 to 10 percent of the air volume.
5. The boiler induced air volume measurement device with the automatic purging function according to claim 1, wherein the electromagnetic valve comprises an electromagnetic coil, an electromagnetic valve body, a valve core, a valve seat sealing gasket, an O-shaped ring and a valve seat, the electromagnetic coil is arranged at the top of the electromagnetic valve body, the valve core is arranged at the bottom of the electromagnetic valve body, the valve core is sealed through the valve core sealing gasket and the O-shaped ring, and the valve seat is arranged at the bottom of the valve core.
6. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 5, wherein an A port is arranged on the left side of the valve core, a B port is arranged on the right side of the valve core, and the A port and the B port are arranged on an air source conveying pipeline.
7. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 5, wherein the electromagnetic valve is mounted on the top surface of the electromagnetic valve body through bolts, and the electromagnetic valve can rotate by 360 degrees.
8. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 1, wherein the first anti-blocking sampler and the second anti-blocking sampler have the same structure and comprise a sampler body, a purging ball valve and an air pressure measuring ball valve, an output port of the electromagnetic valve is connected with the purging port, and the air pressure measuring port is connected with a positive pressure chamber and a negative pressure chamber of the differential pressure transmitter.
9. The device for measuring the induced draft air quantity of the boiler with the automatic purging function according to claim 1, wherein the differential pressure transmitter is provided with 2 pressure interfaces, which are divided into a positive pressure end and a negative pressure end, and the pressure of the positive pressure end is larger than the pressure of the negative pressure section.
10. The boiler induced air volume measurement device with the automatic purging function according to claim 1, wherein the controller adopts a DCS system, the DCS system comprises an upper computer and a test output and input cabinet, and the state parameters of the DCS system are reported to the upper computer after being obtained through an I/O module of the test output and input cabinet and a DCS docking network communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320048324.7U CN219434141U (en) | 2023-01-04 | 2023-01-04 | Boiler induced air volume measuring device with automatic purging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320048324.7U CN219434141U (en) | 2023-01-04 | 2023-01-04 | Boiler induced air volume measuring device with automatic purging function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219434141U true CN219434141U (en) | 2023-07-28 |
Family
ID=87343399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320048324.7U Active CN219434141U (en) | 2023-01-04 | 2023-01-04 | Boiler induced air volume measuring device with automatic purging function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219434141U (en) |
-
2023
- 2023-01-04 CN CN202320048324.7U patent/CN219434141U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101126652B (en) | Electronic gas meter for mass and flow | |
| CN101675322A (en) | Flangeless differential pressure transmitter for industrial process control systems | |
| CN219434141U (en) | Boiler induced air volume measuring device with automatic purging function | |
| CN214893839U (en) | High-efficient, stable wind pressure is measured and is prevented stifled device that sweeps | |
| CN212082475U (en) | Flow measuring device | |
| CN209689689U (en) | A kind of ultrasonic gas flowmeter that can accurately measure gas flow, flow velocity | |
| CN114136534A (en) | Vacuum gauge protection system and semiconductor device | |
| CN113154122A (en) | Take governing valve of flow measurement function | |
| CN206257352U (en) | A kind of Intelligent flow controller | |
| CN112113626A (en) | Coal gas mass flow meter | |
| CN112082605A (en) | Throttling type flue gas flow measuring system and using method thereof | |
| CN215217898U (en) | Wind pressure detection device in ventilation pipeline | |
| CN220625459U (en) | Air flow standard for detecting air flow | |
| CN2184193Y (en) | Electric high-temperature flow discharger | |
| CN216925672U (en) | Differential pressure type flowmeter pressure-leading structure and differential pressure type flowmeter | |
| CN217688100U (en) | Take extraction formula oxygen content analysis mechanism of pulse blowback | |
| CN219347847U (en) | Zirconia flowmeter | |
| CN215865389U (en) | Air blowing type liquid level meter | |
| CN1322936A (en) | Non-contact pressure-measuring open canal sewage flow rater meter | |
| CN218937461U (en) | Temperature-pressure flow homologous measuring device | |
| CN207908325U (en) | A kind of airborne particle counter | |
| CN218271255U (en) | Security protection supervisory equipment gas tightness detection device | |
| CN216410343U (en) | Plug-in flowmeter with online calibration function | |
| CN212275001U (en) | Throttle formula flue gas flow measurement system | |
| CN217278141U (en) | Flue gas on-line measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |