CN2443377Y

CN2443377Y - Fibre airstream meter

Info

Publication number: CN2443377Y
Application number: CN 00218869
Authority: CN
Inventors: 张健邦
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-17
Filing date: 2000-08-17
Publication date: 2001-08-15
Anticipated expiration: 2010-08-17

Abstract

The utility model relates to a fiber air flow instrument which is characterized in that main parts of a test sample barrel, an air pressure balance and a detection part are installed on a main panel and then installed on a special frame, and an electronic balance is particularly adopted for replacing an air pressure balance. The utility model has the advantages that the structure is simple, the weighing of test samples is faster and more accurate, and the utility model creates main conditions for further automatic tests.

Description

Fibre airstream meter

The utility model relates to the measurement of textile fibres mic value, particularly to the improvement of Fibre airstream meter.

Mic value is an important quality index of cotton fiber, has reflected the fineness of cotton fiber and the combination property of degree of ripeness.

The cotton fiber mic value measuring instrument of making according to air-flow method principle is referred to as Fibre airstream meter, is widely used aborning.

The principle of work structure of commercially available Fibre airstream meter as shown in Figure 1, it is made up of three parts:

1. the air pressure balance partly comprises: sample weighting disk 11, counterweight 12, adjusting knob 10;

2. test specimen tube partly comprises: zero-bit variable valve 6, range variable valve 7 and test specimen tube 9;

3. the test section comprises: electromagnetic air pump 1, air strainer 2, air tank 3, choker-line (R1, R2), differential pressure indicator 4, air circuit breaker 5.

By electromagnetic air pump 1 air is filled into air tank 3 through filter 2, be divided into the two-way air-flow by air tank 3 with constant compression force again, one road air-flow is through choker-line R1, and test specimen tube 9 exports atmosphere to; Another road air-flow exports atmosphere to through choker-line R2 and zero-bit variable valve 6, and the two-way air-flow connects into bridge circuit, and the mid point of bridge circuit connects differential pressure indicator 4 and range variable valve 7.Regulate zero-bit variable valve 6 and range variable valve 7, make instrument when calibration, meet the calibration value of appended calibrating valve.The numerical value of the pointer indication on the differential pressure indicator 4 has reflected that the pressure differential on gas bridge both sides changes.The fiber samples of different specific surface areas is to the resistance difference of air-flow, and the pressure differential at gas bridge two ends also changes thereupon, and the numerical value of indication has reflected the long-pending size of specific fiber surface on the differential pressure indicator 4.Behind the indicator scale with the standard sample calibrating instrument, just can measure the mic value of fiber samples to be measured exactly.When air circuit breaker 5 pushes away left, then connect the gas bridge circuit that the air pressure balance is formed, differential pressure indicator 4 indicates the weight of sample on the sample weighting disk 11, regulates the reading that knob 10 is used to calibrate sample weighting disk 11

In commercially available pneumatic tester product such as GJC-01 type, the portable pneumatic tester of MJQ-175 type, all adopt the air pressure balance to claim sample mass.Simple in structure, the low cost of manufacture of air pressure balance.But have significant disadvantages: 1. poor stability, precision is low.The subtle change of gas regulation valve position or the fluctuation of air pressure all can directly influence the accuracy of sample weighing, and precision is generally ± and 16 milligrams.2. complex operation, inefficiency.In use to often calibrate the air pressure balance.To calibrate before the day-to-day test, in test in a day, also will carry out repeatedly verification.As when measuring mic value, turn behind zero-bit variable valve or the range variable valve, also can influence the flow of balance weighing gas circuit, so must carry out verification to the air pressure balance again.In the said goods, the air pressure balance is fixed on the packing base plate of instrument usually, and the verticality of air pressure balance is difficult to keep, and assembling, debugging and the maintenance of air pressure balance are brought inconvenience.

The purpose of this utility model is in order to overcome the deficiency of above-mentioned prior art, a kind of Fibre airstream meter to be provided, being actually a kind of improved Fibre airstream meter, to improve the measurement performance of instrument.

The technical solution of the utility model is as follows:

A kind of Fibre airstream meter, form by following three parts:

1. the air pressure balance partly comprises sample weighting disk 11, counterweight 12, regulates knob 10;

2. test specimen tube partly comprises zero-bit variable valve 6, range variable valve 7 and test specimen tube 9;

3. the test section comprises electromagnetic air pump 1, air strainer 2, air tank 3, choker-line (R1, R2), differential pressure indicator 4, air circuit breaker 5 and gas circuit thereof, be characterized in that we partly and in the test specimen tube segment set are retrofitted in the air pressure balance of former design and installation on the instrumentation package box plate on the main panel, promptly three of instrument parts all are fixed on the same main panel.And then main panel is installed on the special-purpose frame accurately, reliably.After this improved, not only the installation of parts, debugging and maintenance were very convenient, air pressure balance especially, be installed on the vertical main panel after, the assurance that is easy to get of the verticality at its center makes original loaded down with trivial details air pressure balance adjustment become simple and easy to do.And adopt futuramic special-purpose frame, and both improved the resistance to overturning and the reliability of instrument, improved the presentation quality of instrument again.

Second improvement of the present utility model is to adopt the precise electronic balance to substitute the air pressure balance, and it has abandoned the traditional structure that Fibre airstream meter is accustomed to for many years---air pressure balance, adopts the precise electronic balance, has following advantage:

1. simplify the structure of instrument, only needed to use one group of gas bridge loop.

2. exempted and used the required loaded down with trivial details checking routine of air pressure balance, made the sample weighing more quick.

3. improve the precision of sample weighing, reached 0.001 gram.

4. electronic balance can be exported the electric signal and the digital signal of sample weight simultaneously, and this further adopts the computer full automatic working to lay the foundation for instrument.

The utility model is described in further detail below in conjunction with the utility model embodiment and accompanying drawing thereof.

Fig. 1 is the Fibre airstream meter fundamental diagram.

Fig. 2 is one of a utility model Fibre airstream meter embodiment schematic appearance.

Fig. 3 special machine shelf structure figure.

Fig. 4 is two schematic appearance of the utility model Fibre airstream meter embodiment, and wherein left side figure is

Sub-balance synoptic diagram.

Among the figure: 1. the electromagnetic air pump, 2. air strainer, 3. air tank, 4. differential pressure indicator,

Air circuit breaker, 6. the zero-bit variable valve, 7. the range variable valve, 8. the benchmark blow vent,

Test specimen tube, 10. regulate knob, 11. sample weighting disks, 12. weights, 13. calibrating valve,

14. calibrating valve carriage, 15. handles, 16. electronic balances, 17. air pressure balance boxes, 18. air pump boxes, 20. main panels, 30. frames.

Each parts that will have the Fibre airstream meter fundamental diagram are dressed up one of the utility model Fibre airstream meter embodiment as shown in Figure 2, be characterized in the critical piece air tank 3 of Fibre airstream meter, differential pressure indicator 4, test specimen tube 9, air pressure balance box 17 all is installed on the main panel 20, and its gas circuit all is placed in the back side of main panel 20, and then this main panel 20 accurately is installed on the special-purpose frame 30 reliably, so, the not only installation of parts, the debugging and overhaul very convenient, especially the central vertical degree of air pressure balance also is easy to guarantee, makes original loaded down with trivial details air pressure balance adjustment become simple and easy to do.And, adopt futuramic special-purpose frame after, both improved the resistance to overturning and the reliability of instrument, improved the presentation quality of instrument again.

Fig. 4 is the schematic appearance of the utility model embodiment 2, Fig. 4 compares with Fig. 2, from in appearance, just sample weighting disk 11 has been moved on the electronic balance 16 from the air pressure balance, promptly replaced the air pressure balance with electronic balance, but this change has changed the traditional weighing instrument of Fibre airstream meter for many years, and its advantage is:

2. the sample weighing is fast, has exempted and has used the required loaded down with trivial details checking routine of air pressure balance.

3. improved the precision of sample weighing, because the design accuracy of air pressure balance is 0.016 gram, the weighing precision of precise electronic balance is 0.001 gram.

4. electronic balance can be exported the electric signal or the digital signal of sample mass simultaneously, and this will lay the first stone for the further computer automation of instrument.

Claims

1, a kind of Fibre airstream meter, form by following three parts:

A. the air pressure balance partly comprises sample weighting disk (11), counterweight (12) and regulates knob (10);

B. test specimen tube partly comprises: zero-bit variable valve (6), range variable valve (7) and test specimen tube (9);

C. the test section comprises electromagnetic air pump (1), air strainer (2), air tank (3), choker-line (R1, R2), differential pressure indicator (4), air circuit breaker (5) and gas circuit thereof, it is characterized in that said three parts all are fixed on the same main panel (20), and then main panel (20) is installed on the special-purpose frame (30) accurately, reliably.

2, Fibre airstream meter according to claim 1 is characterized in that said air pressure balance partly changes precise electronic balance (16) into.