CN2743800Y

CN2743800Y - Wet-gas flow-meter

Info

Publication number: CN2743800Y
Application number: CN 200320116411
Authority: CN
Inventors: 李云麟; 徐莉
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-04
Filing date: 2003-11-04
Publication date: 2005-11-30
Anticipated expiration: 2013-11-04

Abstract

The wet-gas flowmeter of the utility model is composed of a roller counting structure of gas flow, a mechanical counting pointer and print-wheel structure, a pulse-signal sending structure of rotary encoder and a roller damping spring structure. The rotary encoder of the wet-gas flowmeter is driven by a mechanical counting drive gear to rotate for sending the pulse signal. The pulse signal is inputted to the microcomputer by a shield wire and a signal socket. The central shaft of the mechanical counter is provided with a damping spring to guarantee the consistency of the mechanical indicated value and the microcomputer displayed value. The utility model has the advantages of simple designed structure, high resolution and exact metering. The wet-gas flowmeter is suitable to the accurate detections of the gas flow and the cumulative flow.

Description

Wet test meter

The post a letter wet test meter of mechanism of the tape pulse that the utility model belongs to the gas flow measurement technology.

The mechanical counter that the counter of traditional wet test meter is made up of gear drive, pointer, index dial, abroad have in recent years 1 optical code disk is installed on the mechanical counter central shaft, can send electric impulse signal by photoelectric tube and flow to microcomputer, realized showing flow and integrated flux with microcomputer, but it also have inhomogeneous, the easy missing pulse of pulse signal, resolving power is low and the shortcoming of reciprocating vibration.The utility model design employing rotary encoder is made pulse producer and add the new construction of damping spring on central shaft, just accurately the pulsing signal conveys shows gas flow to microcomputer, and can eliminate the vibration of drum central axis, have the accurate and reliable feature of gas flow counting.

The purpose of the utility model design, it is the deficiency that is to overcome prior art, adopt the exportable A of rotary encoder pulse generation structure, B, Z three-phase pulse signal shows to microcomputer, and add the damping spring structure on the drum central axis, be designed to novel wet test meter, requirement is transformed into three-phase pulse signal input microcomputer with rotary encoder with the revolution of drum central axis and distinguishes and show gas flow and integrated flux, eliminate the drum central axis vibration with damping spring, help improving the resolving power and the accuracy of gas flow counting, be fit to measurement gas flow and integrated flux, also can make the usefulness of the demarcation of gas flow instrument.

The technical essential of the utility model design is as follows: 1) the E6A2-CW type or the E6A2-CWZ type rotary encoder of A, B, the output of Z three-phase selected in rotary encoder 20 designs for use, and the output loop and the way of output, make things convenient for microcomputer software identification cylinder rotating (referring to accompanying drawing 3); 2) rotary encoder pulse generation structure, design rotary encoder 20 is in transmission connection with driving gear 16 by coupling apparatus 19, driven wheel 18, third wheel 17, and rotate synchronously by the central shaft 15 driven rotary scramblers 20 of cylinder 3, the pulse signal that this moment, rotary encoder 20 sent when rotating connects with microcomputer through shielding line 24 and signal plug 25, can show that cylinder rotates the resolution of output gas flow of gas and integrated flux less than 1mL (referring to accompanying drawing 1); And 3) drum central axis damping spring structure, design damping spring 31 is by Upper shaft sleeve 28, little axle sleeve 29 and sell 30 and be connected with drum central axis 15 dampings, after its damping force is adapted at valve-off gas and stops to flow, can make cylinder can't be rotated further (referring to accompanying drawing 2).

Also in conjunction with the accompanying drawings project organization of the present utility model is described in detail as follows with embodiment below:

Fig. 1 is the wet test meter structural representation;

Fig. 2 is the installation diagram of the cylinder damping spring structure of wet test meter;

Fig. 3 is the rotary encoder output loop and the way of output figure of wet test meter.

As shown in Figure 1, 2, this wet test meter is made up of gas flow cylinder counting structure, mechanical count pointer structure, mechanical count character wheel structure, rotary encoder pulse signal transmission structure and cylinder damping spring structure.It is characterized in that having 1 to be tightly connected by cage 23 left ends and cover plate 21, cover plate 21 is fixedlyed connected with shrouding 7 by screw 22, rotary encoder 20 shells and cage 23 are installed and are placed, left end is installed with cover plate 21 and is connected, the left end turning axle is fixedlyed connected with encoder-driven gear 18 by coupling apparatus 19, driven wheel 18 is in transmission connection by third wheel 17 and driving gear 16, driving gear 16 is fixedlyed connected with central shaft 15, central shaft 15 is fixedlyed connected with cylinder 3, and rotate drive rotary encoder 20 by cylinder 3 and rotate synchronously, the pulse signal that rotary encoder 20 rotations produce is connected with the microcomputer signal input interface with signal plug 25 by shielding line 24 forms rotary encoder pulse signal transmitting mechanism; And 1 fixedlyed connected with driving gear 16 by drum central axis 15 bottoms, top and upper and lower axle sleeve (28,26) are rotationally connected, upper and lower axle sleeve (28,26) is connected with last axillare 8 and is fixing with screw 27, little axle sleeve 29 is connected with cover in the central shaft 15 and is fixing with pin 30, damping spring 31 endoporus are connected with central shaft 15 empty covers, the upper end contacts with the Upper shaft sleeve 28 inner dampings in top, the lower end contacts with little axle sleeve 29 upper end dampings, the consistent and composition cylinder damping spring structure of the indicated value that can guarantee cumulative flow value that microcomputer shows and mechanical counter.Described rotary encoder 20 as shown in Figure 3, it is the E6A2-CW type or the E6A2-CWZ type rotary encoder of the output of 1 A, B, Z three-phase.Described gas flow cylinder counting structure is fixedlyed connected with central shaft 15 by cylinder 3, central shaft 15 right-hand members and housing 2 are rotationally connected, middle part, a left side is rotationally connected with shrouding 7, shrouding 7 is formed sealed chamber with housing 2, sealing liquid 1 is filled in more than half chamber under the chamber, last chamber is inserted with partition plate 5 lower ends and is divided into the front and back air chamber in the sealing liquid 1, draft tube 6 is passed housing 2 and is communicated with cylinder 3 annular seal spaces, can make the gas that is measured enter annular seal space and promote cylinder 3 rotations, gas flows out from cylinder 3 rear end escape pipes 4, and cylinder 3 drives central shaft 15 and driving gear 16 rotations and forms.Mechanical count character wheel structure is meshed by driving gear 16 and follower gear 14, and the axle of follower gear 14 passes axillare 8 drive cone gears 13 and rotates, and cone gear 13 is formed with an axle drive character wheel 9 countings by driving cone gear.The mechanical count pointer structure is fixedlyed connected with pointer 12 by central shaft 15 left tops, index dial 10 center pits are connected with central shaft 15 sliding sleeves, periphery is solidly connected with housing 2 cover, and panel 11 peripheries are connected with housing 2 cap seals, can drive pointer 12 rotations and form when cylinder 3 rotations.Such as selecting revolution to send the E6A2-CW type rotary encoder of 2000 pulses, driving gear 16 and driven wheel 18 are than being 5: 1, the throughput in 1 week of cylinder revolution is 10L, then the represented gas buildup flow of each pulse is exactly 10/10000=0.001L, and promptly microcomputer shows that the resolution of gas buildup flow is less than 1mL.

In a word, the wet test meter that manufactures and designs according to present embodiment, just can rotate that driven rotary scrambler, pointer and character wheel are counted rotation synchronously respectively by the driving gear on the central shaft by cylinder, eliminate cylinder with sealing liquid and damping spring again and rotate vibration when stopping, can keep the displayed value of microcomputer consistent with the indicated value of mechanical counter, and has an advantage of the high and accurate measurement of resolution, be suitable for accurately measuring gas flow and integrated flux, also can make the usefulness of gas flow instrument demarcation.

Claims

1. wet test meter, it is by gas flow cylinder counting structure, the mechanical count pointer structure, mechanical count character wheel structure, the rotary encoder pulse signal sends structure and cylinder damping spring structure is formed, it is characterized in that having 1 to be tightly connected by cage 23 left ends and cover plate 21, cover plate 21 is fixedlyed connected with shrouding 7 by screw 22, rotary encoder 20 shells and cage 23 are installed and are placed, left end is installed with cover plate 21 and is connected, the left end turning axle is fixedlyed connected with encoder-driven gear 18 by coupling apparatus 19, driven wheel 18 is in transmission connection by third wheel 17 and driving gear 16, driving gear 16 is fixedlyed connected with central shaft 15, central shaft 15 is fixedlyed connected with cylinder 3, and rotate drive rotary encoder 20 by cylinder 3 and rotate synchronously, the pulse signal that rotary encoder 20 rotations produce is connected with the microcomputer signal input interface with signal plug 25 by shielding line 24 forms rotary encoder pulse signal transmitting mechanism; And 1 fixedlyed connected with driving gear 16 by drum central axis 15 bottoms, top and upper and lower axle sleeve (28,26) are rotationally connected, upper and lower axle sleeve (28,26) is connected with axillare 8 and is fixing with screw 27, little axle sleeve 29 is connected with cover in the central shaft 15 and is fixing with pin 30, damping spring 31 endoporus are connected with central shaft 15 empty covers, the upper end contacts with the Upper shaft sleeve 28 inner dampings in top, the lower end contacts with little axle sleeve 29 upper end dampings, the consistent and composition cylinder damping spring structure of the indicated value that can guarantee cumulative flow value that microcomputer shows and mechanical counter.

2. wet test meter as claimed in claim 1 is characterized in that rotary encoder 20 is E6A2-CW type or E6A2-CWZ type rotary encoders of 1 A, B, the output of Z three-phase.