CN86211096U

CN86211096U - Pressure-difference type measuring equipment of flow resistance of tube

Info

Publication number: CN86211096U
Application number: CN 86211096
Authority: CN
Inventors: 梁嘉麟
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-31
Filing date: 1986-12-31
Publication date: 1987-11-07

Abstract

The utility model discloses a pressure-difference type measuring equipment of the flow resistance of the tube, which belongs to the measuring technique of the flow resistance of the tube. The utility model is an improvement for the flow rate type measuring equipment of the flow resistance of the tube with the relatively slow detecting speed appropriate for the adoption of the laboratory in order to enhance the detecting speed substantially. The pressure difference of the fluid is formed in the tube, and then the pressure-difference data is displayed through an electronic digital display system supported by a high-precision force sensitive sensor or some such. The utility model is suitable for the fast detection of the flow resistance of various flow valves and various tubes, in particular suitable for the fast detection of the flow resistance of the high flow resistance type tube and the throttling valve of the category of the capillary tube of the domestic refrigerator.

Description

Pressure-difference type measuring equipment of flow resistance of tube

The utility model belongs to pipeline flow resistance measurement technology.

The pipeline flow resistance metering method that existing quilt generally adopts is: under level pressure, the flow resistance situation of representing this pipeline with the flow number that passes through certain gas of tested pipeline or liquid that measures in the unit interval, flow type pipeline flow resistance meter by this method design comprises high-pressure fluid power source and this two part of flowmeter at least, and tested pipeline is positioned at the centre of above-mentioned these two parts.This pipeline flow resistance meter is suitable for testing laboratory to be adopted, be not suitable for being directly used in production, each relevant parts is detected one by one, because its detection time is too slow, with the kapillary that plays throttling action in the refrigeration system on the domestic refrigerator is example, every will spend time a few minutes at least, for annual production at several ten thousand, even the producer of hundreds of thousands platform domestic refrigerator, really have many troubles, flow type kapillary flow resistance measuring apparatus sees " refrigerator " (84 years versions) the 87th page of Fig. 5-4 and Fig. 5-5 that Dan Dake writes for details.

The purpose of this utility model is a kind of improvement that flow type pipeline flow resistance meter is carried out, and detects pipeline flow resistance required time to reduce significantly, is convenient to be directly used in production.

The utility model is achieved in that it contains the high-pressure fluid power source and as the damper that has the fluid pressure difference digital display system of this apparatus main body; This fluid pressure difference digital display system can be made up of two tensimeters that are positioned at two different parts, also can replace two above-mentioned tensimeters by the electronic digital displayer that force-sensing sensor and it are supported; Two different parts of above-mentioned this can be two ends of damper, also can be this end that connects with tested pipeline of damper and the airspace at an atmosphere pressure place; This damper can be a root damping pipeline, also can be flow valve.

Compared with prior art: the utility model allows fluid fall the size cases that these data are represented flow resistance through the pressure that the passage that certain flow resistance is arranged (damper) of connecting with measured tube produces owing to having adopted, therefore the spent time is the flashy time when detecting the pipeline flow resistance, maximum times in one, two seconds just, obviously more faster than prior art, for pipeline flow resistance measurement technology is directly used in production, the detection that relevant parts in enormous quantities carry out is one by one got the condition created with the decision house.

Accompanying drawing is as the utility model embodiment: the principle of work synoptic diagram of domestic refrigerator capillary detection device, liquid nitrogen bottle (1) as the high-pressure fluid power source, adapting pipe (2), tensimeter (3), electronic digital displayer (5), force-sensing sensor (5), this device main body partly is damping and display part (6) that can become one in the double dot dash line scope, as the kapillary (7) of tested pipeline, active joint (8), pipeline type damper (9), reduction valve (10), stop valve (11), pressure-measuring-point (A) and (B), atmospheric pressure measuring point (C).

The applying working condition of this pick-up unit is: the index that is coupled to the tensimeter (3) that pressure-measuring-point (A) locates is 10kg/cm ², open stop valve (11), regulate reduction valve (10) and just can access above-mentioned data.It is definite that the digital scope of the qualified kapillary (7) that electronic digital displayer (4) is shown such as be 5.81 ± 0.04, this digital scope are that the standard capillary (7) that is respectively upper and lower bound by two flow resistance values in advance try timing on this pick-up unit.If get a kapillary to be measured (7), although be considered to its length in advance, the roughness of aperture and hole wall is identical with standard capillary (7), but after testing, find that the display digit of electronic digital displayer (4) is 5.74 as shown in drawings, and 5.74＜5.81 ± 0.04, the flow resistance that just can judge this tested kapillary (7) excessive at once, defective, but needn't subscription rate, also have after slightly its length being cut short qualified may.---the obvious bleeder circuit of principle of work in the electronic circuit of this device, resistance in series is than changing, and then intrinsic standoff ratio also changes.Detect the time of this kapillary to be measured (7), the time that connects and pull down this tested kapillary (7) with active joint (8) spend several seconds at most and get final product if comprise again.

Claims

1, a kind of pressure reduction type channel flow choked flow amount measuring apparatus, it contains high-pressure fluid power source (1), it is characterized in that: also contain the damper (9) that is made of the damping pipeline that links with power source (1) and constitute the tensimeter (3) that connects two different parts.

2, according to the described a kind of pressure reduction type pipeline flow resistance meter of claim 1, it is characterized in that: described damper (9) also can be a flow valve.

3, according to the described a kind of pressure reduction type pipeline flow resistance meter of claim 1, it is characterized in that: described two different parts, can be at (A) and (B), also can be and (C) at (B).

4, according to the described a kind of pressure reduction type pipeline flow resistance meter of claim 1, it is characterized in that: described tensimeter (3) also can constitute by force-sensing sensor (5) with by the electronic digital displayer (4) that it is supported.