A kind of rectangular flow gauge
A kind of rectangular flow gauge
 CN 204,373,705 U
 Filed: 12/08/2014
 Issued: 06/03/2015
 Est. Priority Date: 12/08/2014
 Status: Active Grant
First Claim
1. a rectangular flow gauge, is characterized in that:
 comprise measuring tube, positive pressure pipe, negative pressure pipe and rectangle voussoir;
Described positive pressure pipe, negative pressure pipe chain intermittent weld are arranged on measuring tube;
Described rectangle voussoir is cuboid, is closely set in measuring tube inwall, rectangle voussoir offers pressure through hole, and described pressure through hole vertically should facing to negative pressure pipe, and the diameter of described pressure through hole is identical with negative pressure pipe internal diameter;
Described rectangle voussoir is provided with front bevel angle α
at fluid upstream, downstream is provided with back bevel angles β
, is provided with a rectangular platform in the middle of described front bevel angle α and
back bevel angles β
, described front bevel angle α
angle is greater than back bevel angles β
angle;
A throttling arc hole is formed between described rectangle voussoir and measuring tube.
Chinese PRB Reexamination
Abstract
The utility model discloses a kind of rectangular flow gauge, comprise measuring tube, positive pressure pipe, negative pressure pipe and rectangle voussoir; Described positive pressure pipe, negative pressure pipe chain intermittent weld are arranged on measuring tube; Described rectangle voussoir is cuboid, is closely set in measuring tube inwall, rectangle voussoir offers pressure through hole, and described pressure through hole vertically should facing to negative pressure pipe, and the diameter of described pressure through hole is identical with negative pressure pipe internal diameter; Described rectangle voussoir is provided with front bevel angle α at fluid upstream, downstream is provided with back bevel angles β, is provided with a rectangular platform in the middle of described front bevel angle α and back bevel angles β, described front bevel angle α angle is greater than back bevel angles β angle; A throttling arc hole is formed between described rectangle voussoir and measuring tube.This invention rectangular flow gauge has the advantages that structural safety is firm, not easy to wear, longtime stability good, measuring accuracy is high, the pressure loss is little.

1 Citation
Largecaliber middlehigh velocity flow velocity meter  
Patent #
CN 105,043,448 A
Filed 08/12/2015

Current Assignee

No References
8 Claims

1. a rectangular flow gauge, is characterized in that:
 comprise measuring tube, positive pressure pipe, negative pressure pipe and rectangle voussoir;
Described positive pressure pipe, negative pressure pipe chain intermittent weld are arranged on measuring tube;
Described rectangle voussoir is cuboid, is closely set in measuring tube inwall, rectangle voussoir offers pressure through hole, and described pressure through hole vertically should facing to negative pressure pipe, and the diameter of described pressure through hole is identical with negative pressure pipe internal diameter;
Described rectangle voussoir is provided with front bevel angle α
at fluid upstream, downstream is provided with back bevel angles β
, is provided with a rectangular platform in the middle of described front bevel angle α and
back bevel angles β
, described front bevel angle α
angle is greater than back bevel angles β
angle;
A throttling arc hole is formed between described rectangle voussoir and measuring tube.
 comprise measuring tube, positive pressure pipe, negative pressure pipe and rectangle voussoir;

2. a kind of rectangular flow gauge according to claim 1, it is characterized in that:
 described positive pressure pipe is located at the upstream of measuring tube, described negative pressure pipe is located at the middle and lower reaches of measuring tube.

3. a kind of rectangular flow gauge according to claim 1, is characterized in that:
 the angle [alpha] of described front bevel angle is 22.5 °
to 45 °
, and back bevel angles angle beta is 5 °
to 15 °
.
 the angle [alpha] of described front bevel angle is 22.5 °

4. a kind of rectangular flow gauge according to claim 2, is characterized in that:
 the height that the length of described rectangular platform is greater than described throttling arc hole is less than the internal diameter of measuring tube.

5. a kind of rectangular flow gauge according to claim 3, is characterized in that:
 the pressure flange that described positive pressure pipe, negative pressure pipe are all welded with, is connected with two flange differential pressure meter in the middle of described two pressure flanges.

6. according to a kind of rectangular flow gauge according to claim 1 or claim 2, it is characterized in that:
 the connected mode between described rectangle voussoir and measuring tube is for being fastenedly connected.

7. according to claim 2 or a kind of rectangular flow gauge according to claim 3, it is characterized in that:
 described measuring tube two ends are provided with joint flange, described joint flange is used for the connection of measured pipeline.

8. a kind of rectangular flow gauge according to claim 2, is characterized in that:
 described positive pressure pipe, negative pressure pipe are the throughhole pipe of same size size.
Specification(s)