用于差压变送器的防尘隔离装置
By installing a filter pad between the flanges of the differential pressure transmitter and using a purge pipe to backflush the dust layer, the problem of particulate matter and dust entering the sampling tube was solved, thus maintaining both dust prevention and measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA SANXIA MENGNENG ENERGY CO LTD
- Filing Date
- 2025-10-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot effectively prevent particulate matter and dust from entering the sampling tube of the differential pressure transmitter, thus affecting measurement accuracy.
A dustproof isolation device is designed, which installs a filter pad between the first flange body and the second flange body and is equipped with a purge pipe. The dust layer on the filter pad is back-blown by pressurized air to prevent dust from entering the sampling tube.
It effectively prevents particulate matter and dust from entering the sampling tube, maintains measurement accuracy, and allows for easy replacement of the filter pad, reducing measurement errors.
Smart Images
Figure CN224518009U_ABST
Abstract
Claims
1. A dust isolation device for a differential pressure transmitter, characterized by: The device includes a first valve (10), a first flange (20), a filter pad (30), a second flange (40), and a second valve (60). One end of the first valve (10) is installed on the main pipeline (1), and the other end is installed with the first flange (20). The second flange (40) is installed on the upper side of the first flange (20) by bolts (50). The filter pad (30) is installed between the first flange (20) and the second flange (40). The upper end of the second flange (40) is connected to one end of the second valve (60), and the other end of the second valve (60) is used to connect to the sampling tube (5) of the differential pressure transmitter (4).
2. The dust isolation apparatus for a differential pressure transmitter of claim 1, wherein: The first flange body (20) includes a first flange (21), and a first pipe joint (22) is connected to the lower side of the first flange (21). The first pipe joint (22) is used to screw and fix with the first valve (10). The first flange (21) is provided with multiple threaded holes (211).
3. The dust isolation apparatus for a differential pressure transmitter of claim 2, wherein: The second flange body (40) includes a second flange (41), and a second pipe joint (42) is connected to the upper side of the second flange (41). The second pipe joint (42) is used to screw and fix the second valve (60). The second flange (41) is provided with multiple connection holes (411). The connection holes (411) correspond to the threaded holes (211). The threaded end of the bolt (50) passes through the connection hole (411) and then screws into the threaded hole (211). The filter pad (30) is located between the first flange (21) and the second flange (41).
4. The dirt barrier for a differential pressure transmitter of claim 3, wherein: A movable plate (90) is also installed between the first flange (21) and the second flange (41). A through hole (91) is provided on the movable plate (90). An annular groove (92) is provided at the upper end of the through hole (91). The diameter of the annular groove (92) is larger than the diameter of the through hole (91). A filter pad (30) is installed in the annular groove (92). A sealing groove is provided on the upper side of the first flange (21). A sealing ring (23) is installed in the sealing groove.
5. The dirt barrier for a differential pressure transmitter of claim 4, wherein: The first flange (21) and the second flange (41) are respectively provided with three threaded holes (211) and three connecting holes (411). The three threaded holes (211) and the three connecting holes (411) are arranged in a triangular pattern. The movable plate (90) is provided with two through holes (91). A limiting hole (93) is also provided on one side of the movable plate (90). The movable plate (90) is fitted onto one of the bolts (50) through the limiting hole (93). By rotating the movable plate (90), the two through holes (91) can be aligned with the center holes on the first flange (21) and the second flange (41) respectively.
6. The dust isolation apparatus for a differential pressure transmitter of claim 5, wherein: A purge pipe (70) is also fixedly connected to the second pipe joint (42). One end of the purge pipe (70) is located outside the second pipe joint (42), and the other end is located inside the second pipe joint (42).
7. The dirt barrier for a differential pressure transmitter of claim 6, wherein: The purge pipe (70) has a bent pipe (71) fixed to one end inside the second pipe joint (42), and the outlet end of the bent pipe (71) faces the filter pad (30).
8. The dirt barrier for a differential pressure transmitter of claim 6, wherein: The purge pipe (70) has a third valve (80) installed at one end outside the second pipe joint (42).
9. The dirt barrier for a differential pressure transmitter of claim 8, wherein: The first valve (10), the second valve (60) and the third valve (80) are manual valves or electromagnetic valves or pneumatic valves.
10. The dirt barrier for a differential pressure transmitter of any one of claims 1-8, wherein: The filter pad (30) comprises a sealing ring body (31) and a filter layer (32), the filter layer (32) is fixedly connected in the sealing ring body (31), and the filter layer (32) comprises a filter screen, filter cotton or filter cloth.