Title:
DEVICE FOR MEASURING NEGATIVE PRESSURE
Document Type and Number:
WIPO Patent Application WO/2020/133195
Kind Code:
A1
Abstract:
A device for measuring negative pressure, comprising a measuring device body (11), a measuring pipeline (12), a piston pad (13), a connecting rod (14), an air conveying pipeline (15), a storage airbag (16), a pressure spring (17), and a rubber pad (18). The measuring pipeline (12) is provided above the inside of the measuring device body (11), the measuring pipeline (12) is integrally formed with the measuring device body (11), the storage airbag (16) is provided at the bottom of the measuring pipeline (12), the storage airbag (16) is fixedly connected to the measuring pipeline (12), and the air conveying pipeline (15) is provided at the bottom of the storage airbag (16). The storage airbag (16) is connected to an external negative pressure device by means of the air conveying pipeline (15), and then a pressure gauge is inserted into the measuring pipeline (12) to measure the pressure; when the pressure gauge is removed after the measurement, the pressure spring (17) automatically lifts the rubber pad (18) to block the measuring pipeline (12). In this way, the airtightness and accuracy of the device for measuring the negative pressure is ensured, the measuring pipeline (12) is coated with a waterproof layer to prevent the situation that the movement of a piston is affected and the accuracy of measurement is ultimately affected caused by water permeates into the pipelines.
Inventors:
WANG FANG (CN)
Application Number:
PCT/CN2018/124801
Publication Date:
July 02, 2020
Filing Date:
December 28, 2018
Export Citation:
Assignee:
WANG FANG (CN)
International Classes:
G01L11/00; G01L19/00
Foreign References:
| CN105031791A | 2015-11-11 | |||
| CN2279489Y | 1998-04-22 | |||
| CN108905435A | 2018-11-30 | |||
| CN2901272Y | 2007-05-16 | |||
| CN201022866Y | 2008-02-20 | |||
| CN101798756A | 2010-08-11 | |||
| JP2006284405A | 2006-10-19 |
Attorney, Agent or Firm:
BEIJING TIAN QI ZHI XIN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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