Automatic cleaning device for differential pressure transmitter
By designing an automatic cleaning device for differential pressure transmitters, which utilizes components such as cleaning air pipes and filters for jet cleaning, the problem of dust and dirt accumulation on Pitot tubes has been solved, improving measurement accuracy and maintenance convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-03
AI Technical Summary
Pitot tubes of differential pressure transmitters are prone to accumulating dust and dirt during long-term use, which affects measurement accuracy and is difficult to clean efficiently. Traditional manual cleaning methods are inefficient and ineffective.
Design an automatic cleaning device for differential pressure transmitters. By connecting a cleaning air pipe to a Pitot tube and installing a filter, pressure reducing valve, pressure gauge, and cleaning air valve, the device uses compressed air for jet cleaning to achieve online cleaning of the Pitot tube.
It enables efficient removal of dust and dirt without disassembling the Pitot tube, improving measurement accuracy and maintenance convenience.
Smart Images
Figure CN223960221U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a cleaning device, and more particularly to an automatic cleaning device for a differential pressure transmitter. Background Technology
[0002] During long-term use, dust, dirt, and other impurities easily accumulate on the Pitot tube of a differential pressure transmitter, affecting measurement accuracy and even causing equipment failure. Traditional cleaning methods require manual disassembly and cleaning of the Pitot tube, which is not only inefficient but also difficult to guarantee cleaning effectiveness. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic cleaning device for differential pressure transmitters, so as to realize online jet cleaning of the Pitot tube of the differential pressure transmitter, thereby improving the measurement accuracy and service life of the differential pressure transmitter.
[0004] This utility model is achieved through the following technical solution:
[0005] An automatic cleaning device for a differential pressure transmitter is disclosed. The positive pressure connection pipe and negative pressure connection pipe of the differential pressure transmitter main unit are respectively connected to the positive pressure tapping pipe and negative pressure tapping pipe of the Pitot tube. Solenoid valves are respectively installed on the positive pressure connection pipe and negative pressure connection pipe of the differential pressure transmitter main unit. The automatic cleaning device includes a cleaning air pipe. The air inlet end of the cleaning air pipe is connected to a compressed air source. A filter, a pressure reducing valve and a cleaning air valve are sequentially arranged on the cleaning air pipe along the airflow direction. The air outlet end of the cleaning air pipe is connected to two branch air pipes. The air outlet ends of the two branch air pipes are respectively connected to the positive pressure tapping pipe and negative pressure tapping pipe of the Pitot tube.
[0006] As a preferred embodiment of the above-mentioned automatic cleaning device, the cleaning air pipe is also equipped with a pressure gauge, which is located between the pressure reducing valve and the cleaning air valve.
[0007] As a preferred embodiment of the above-mentioned automatic cleaning device, the pressure of the compressed air source is not less than 5 bar.
[0008] This invention has the following advantages over the prior art:
[0009] This utility model provides an automatic cleaning device for differential pressure transmitters. By setting up a cleaning air pipe whose end is connected to the positive and negative pressure inlet pipes of the Pitot tube, and by sequentially setting a filter, pressure reducing valve, pressure gauge and cleaning air valve along the airflow direction on the cleaning air pipe, effective jet cleaning of the inside of the Pitot tube is achieved without the need to disassemble the Pitot tube for manual cleaning, thus improving cleaning efficiency and effect, thereby improving the measurement accuracy and maintenance convenience of the differential pressure transmitter. Attached Figure Description
[0010] Figure 1This is a schematic diagram of the structure of this utility model.
[0011] The following numbers are labeled in the diagram: 1 Differential pressure transmitter main unit; 2 Positive pressure connection pipe; 3 Negative pressure connection pipe; 4 Pitot tube; 5 Solenoid valve; 6 Air duct; 7 Cleaning air duct; 8 Filter; 9 Pressure reducing valve; 10 Pressure gauge; 11 Cleaning air valve; 12 Branch air duct. Detailed Implementation
[0012] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.
[0013] See Figure 1 This embodiment discloses an automatic cleaning device for a differential pressure transmitter. The positive pressure connection pipe 2 and negative pressure connection pipe 3 of the differential pressure transmitter main unit 1 are connected to the positive pressure tap and negative pressure tap of the Pitot tube 4, respectively. Solenoid valves 5 are respectively installed on the positive pressure connection pipe 2 and negative pressure connection pipe 3 of the differential pressure transmitter main unit 1. The differential pressure transmitter is used to detect the wind speed in the air duct 6. The automatic cleaning device includes a cleaning air pipe 7. The inlet end of the cleaning air pipe 7 is connected to a compressed air source with a pressure of not less than 5 bar. A filter 8, a pressure reducing valve 9, a pressure gauge 10, and a cleaning air valve 11 are sequentially arranged along the airflow direction on the cleaning air pipe 7. The outlet end of the cleaning air pipe 7 is connected to two branch air pipes 12, and the outlet ends of the two branch air pipes 12 are respectively connected to the positive pressure tap and negative pressure tap of the Pitot tube 4. The pressure gauge 10 is located between the pressure reducing valve 9 and the cleaning air valve 11 and is used to detect the gas pressure in the cleaning air pipe 7 after being reduced by the pressure reducing valve 9.
[0014] When cleaning the Pitot tube 4 is required, first close the two solenoid valves 5 on the positive pressure connection pipe 2 and the negative pressure connection pipe 3 of the differential pressure transmitter, open the cleaning air valve 11, and compressed air enters the cleaning air pipe 7. After being filtered by the filter 8, the pressure is reduced and adjusted to a suitable pressure by the pressure reducing valve 9, and then enters the two branch air pipes 12 through the cleaning air valve 11, and then enters the Pitot tube 4 through the positive pressure pipe and the negative pressure pipe to blow clean the inside of the Pitot tube 4, effectively removing accumulated dust and dirt. After the blowing is completed, the cleaning air valve 11 is closed, the two solenoid valves 5 are opened, and the device returns to standby mode, waiting for the next cleaning operation.
[0015] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A differential pressure transmitter automatic cleaning device, the positive pressure connection pipe and the negative pressure connection pipe of the differential pressure transmitter host are connected with the positive pressure lead pipe and the negative pressure lead pipe of the Pitot tube respectively, and the positive pressure connection pipe and the negative pressure connection pipe of the differential pressure transmitter host are respectively provided with electromagnetic valves, characterized in that: The automatic cleaning device comprises a cleaning air pipe, an air inlet end of which is connected to a compressed air source, a filter, a pressure reducing valve and a cleaning air valve are sequentially arranged on the cleaning air pipe along the air flow direction, and an air outlet end of the cleaning air pipe is connected to two branch air pipes, and the air outlet ends of the two branch air pipes are respectively connected to a positive pressure lead pipe and a negative pressure lead pipe of a Pitot tube.
2. A differential pressure transmitter automatic cleaning device as claimed in claim 1, characterized in that: A pressure gauge is further arranged on the cleaning air pipe, and the pressure gauge is located between the pressure reducing valve and the cleaning air valve.
3. A differential pressure transmitter automatic cleaning device as claimed in claim 1, wherein: The pressure of the compressed air source is not less than 5 bar.