CN212060311U - Low-power-consumption ash-removing type pitot tube wind speed detection device - Google Patents
Low-power-consumption ash-removing type pitot tube wind speed detection device Download PDFInfo
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- CN212060311U CN212060311U CN202021108190.6U CN202021108190U CN212060311U CN 212060311 U CN212060311 U CN 212060311U CN 202021108190 U CN202021108190 U CN 202021108190U CN 212060311 U CN212060311 U CN 212060311U
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- pitot tube
- differential pressure
- pressure transmitter
- micro differential
- wind speed
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Abstract
The low power consumption deashing type pitot tube wind speed detection device belongs to the technical field of wind speed detection, and comprises a pitot tube and a micro differential pressure transmitter, wherein both ends of the micro differential pressure transmitter are connected to a pitot tube probe through a gas pipe, the pitot tube probe, the gas pipe and the micro differential pressure transmitter form a first closed loop, a gas pipe communicated with a compressed gas source is connected in parallel with the micro differential pressure transmitter and forms a second closed loop with the pitot tube probe, two-position three-way electromagnetic valves are respectively arranged at two parallel connection points, A and B ends of the two-position three-way electromagnetic valves are connected with the first closed loop formed by the pitot tube probe and the micro differential pressure transmitter, and C and B ends of the two-position three-way electromagnetic valves are connected with the second closed loop formed; through rational planning of solenoid valve overall arrangement, utilize the characteristics of through-type two tee bend solenoid valves to switch and detect and sweep, the solenoid valve need not long-time circular telegram, only need regularly sweep the time circular telegram can, realized low power consumption, more economical and practical.
Description
Technical Field
The utility model belongs to a wind speed detection technical field especially indicates a low power consumption deashing type pitot tube wind speed check out test set, is particularly suitable for being applied to various abominable test occasions such as high dust.
Background
The traditional pitot tube wind speed detection device is composed of a pitot tube (1) and a micro differential pressure transmitter (2), referring to the attached drawing 1, after the pitot tube is arranged in an air pipe and fixedly installed, the pitot tube is connected to a pressure measuring port of the micro differential pressure transmitter through a PU pipe, differential pressure is detected through the pitot tube, and the pitot tube is converted into wind speed through the micro differential pressure transmitter. The pitot tube has the biggest defects that the pitot tube is easy to block, and dust is easy to accumulate on the pitot tube in the using process, so that a detection port is blocked, and the detection result is influenced.
Disclosure of Invention
The utility model discloses just in order to overcome above-mentioned not enough, provide a low power consumption deashing type pitot tube wind speed check out test set, adopt solenoid valve circuit control compressed gas to regularly sweep the pitot tube, avoid the piling up of dust on the pitot tube, rational planning solenoid valve overall arrangement simultaneously utilizes the characteristic of two tee bend solenoid valves of through to switch to detect and sweep, and the solenoid valve need not long-time circular telegram. The method is implemented as follows: the low-power-consumption dust-cleaning type pitot tube wind speed detection equipment comprises a pitot tube and a micro differential pressure transmitter, wherein two ends of the micro differential pressure transmitter are connected to a pitot tube probe through a gas pipe, the pitot tube probe, the gas pipe and the micro differential pressure transmitter form a first closed loop.
The two-position three-way electromagnetic valve is a straight-through two-position three-way electromagnetic valve, a closed loop I formed by the straight-through A end and the B end, the pitot tube probe and the micro differential pressure transmitter is in a working state when the power is off, and a closed loop II formed by the perpendicular C end and the pitot tube probe and the compressed gas pipe connected with the micro differential pressure transmitter in parallel is in a working state when the power is on. By utilizing the characteristics of the direct-acting two-position three-way electromagnetic valve, the energy is saved, long-term power on is not needed, the controller points can be reduced in hardware, the circuit is also reduced, and the hardware investment cost is low.
After the pitot tube is fixedly arranged in the air pipe, the air pipe is connected to a pressure measuring port of the micro-differential pressure transmitter to detect differential pressure and convert the differential pressure into air speed to transmit signals. In the use process, when the two-position three-way electromagnetic valve is powered off, the A end and the B end are directly connected, and work with a closed loop formed by a pitot tube and a micro differential pressure transmitter to realize the detection of differential pressure. After working for a certain time, the pitot tube probe is required to be purged of accumulated dust, the straight two-position three-way electromagnetic valve is powered on, the A end and the B end are disconnected, the vertical C end and the B end are powered on, the pitot tube and a closed loop formed by a compressed gas pipe connected in parallel with the micro differential pressure transmitter work to realize the timed purging of the pitot tube probe, and the electromagnetic valve is powered off to continue to detect differential pressure by the A-B after purging is finished.
The compressed gas is compressed air or inert gas, and for some media which can not use the compressed air, the inert gas is used so as to avoid secondary pollution to products.
The trachea of the utility model is a PU tube.
The utility model discloses an add one and the parallelly connected compressed gas closed circuit of differential pressure transmitter, parallel connection point department installs two tee bend solenoid valves of general formula respectively and opens and close two closed circuits, realizes the gas velocity of flow that comes to pitot tube air velocity transducer's conduction with differential pressure transmitter respectively, flow, gas differential pressure on-line measuring to and sweep regularly to the pitot tube with control compressed gas and avoid the piling up of dust on the pitot tube. Through the reasonable layout of the solenoid valve, the detection and the purging are switched by utilizing the characteristics of the straight-through two-position three-way solenoid valve, the solenoid valve does not need to be electrified for a long time, and only needs to be electrified when being purged at regular time, so that the low power consumption is realized, and the solenoid valve is more economical and practical.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The low-power-consumption ash-cleaning type pitot tube wind speed detection equipment comprises a pitot tube 1 and a micro differential pressure transmitter 2, wherein two ends of the micro differential pressure transmitter 2 are connected to a probe of the pitot tube 1 through a PU pipe, the probe of the pitot tube 1, the PU pipe and the micro differential pressure transmitter 2 form a first closed loop, the PU pipe communicated with a compressed gas source is connected with the micro differential pressure transmitter 2 in parallel, and the probe and the pitot tube 1 form a closed loop II, a straight-through two-position three-way electromagnetic valve 3 and a straight-through two-position three-way electromagnetic valve 4 are respectively arranged at two parallel connection points, the straight-through two-position three-way electromagnetic valve 3 and the straight-through two-position three-way electromagnetic valve 4 detect differential pressure through A-B in the using process, C-B is used for purging the pitot tube probe when the straight-through two-position three-way electromagnetic valve 3 and the straight-through two-position three-way electromagnetic valve 4 are electrified at fixed time, and the straight-through two-position three-way electromagnetic valve 3 and the straight-through two-position.
Claims (3)
1. The low-power-consumption dust-cleaning type pitot tube wind speed detection equipment comprises a pitot tube and a micro differential pressure transmitter, wherein two ends of the micro differential pressure transmitter are connected to a pitot tube probe through a gas pipe, the pitot tube probe, the gas pipe and the micro differential pressure transmitter form a first closed loop.
2. The low power consumption ash removal type pitot tube wind speed detection device according to claim 1, characterized in that the two-position three-way solenoid valve is a straight-through two-position three-way solenoid valve, a closed loop first formed by the straight-through A and B ends, the pitot tube probe and the micro differential pressure transmitter is in an operating state when the power is off, and a closed loop second formed by the vertical C end, the pitot tube probe and the compressed gas pipe connected in parallel with the micro differential pressure transmitter is in an operating state when the power is on.
3. The low-power-consumption ash removal type pitot tube wind speed detection device as claimed in claim 1, wherein the air pipe is a PU pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021108190.6U CN212060311U (en) | 2020-06-16 | 2020-06-16 | Low-power-consumption ash-removing type pitot tube wind speed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021108190.6U CN212060311U (en) | 2020-06-16 | 2020-06-16 | Low-power-consumption ash-removing type pitot tube wind speed detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212060311U true CN212060311U (en) | 2020-12-01 |
Family
ID=73514900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021108190.6U Active CN212060311U (en) | 2020-06-16 | 2020-06-16 | Low-power-consumption ash-removing type pitot tube wind speed detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212060311U (en) |
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2020
- 2020-06-16 CN CN202021108190.6U patent/CN212060311U/en active Active
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