CN200968891Y

CN200968891Y - Low pressure bellow-type sewage gas pressure gauge

Info

Publication number: CN200968891Y
Application number: CN 200620099030
Authority: CN
Inventors: 钱晓吾
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-14
Filing date: 2006-09-14
Publication date: 2007-10-31
Anticipated expiration: 2016-09-14

Abstract

The utility model discloses a low pressure diaphragm capsule type methane pressure gauge, comprising a crust, a sensor, an oscillating bar transmission organ, a gear drive, and an index hand. An inlet connector is arranged under the crust, which is characterized in that the transmission organ is composed of a diaphragm capsule and diaphragm capsule type bolts. The oscillating bar transmission organ consists of an oscillating bar, an oscillating bar bracket, a button pole, a revolving shaft and a shifting fork. Besides, the gear drive is composed of a central gear, a fan gear, and a hairspring. An induction trunk communicated with the air inflow connector is arranged in the inner wall of the back wall shroud, and the induction trunk has the vent port jointed with the back diaphragm capsule. The utility model is accurate in measurement, makes less errors in the backhaul. Besides, the utility model has the advantages of corrosion resistance, simple structure, low production price, convenient manufacturing and maintain, and thus fully meets the requirement of the micro pressure measurement. The utility model can be widely used, not only in the biogas furnace, liquefied gas stove, gas burner and in monitoring front and the back part of the other low pressure gas ovens, but also in detecting and monitoring other aspects relevant.

Description

The low pressure diaphragm-type sewage gas pressuregage

Technical field

The utility model relates to the pressure monitoring instrument, especially relates to a kind of low pressure diaphragm-type sewage gas pressuregage that is used for the low pressure reduction monitoring of gas.

Background technology

Domestic and international application all partly is made up of sensor (as bourdon tube, metal bellows, rubber film), lever transmission mechanism, gear drive and pointer etc. basically in the manometric structure of the mechanical pointer of pressure monitoring at present, wherein the advantage of Bourdon tube pressure gauge be simple in structure, make easy to maintenance, shortcoming is the pressure that only is applicable to that measurement is bigger, not energy measurement minute-pressure; Metal film boxlike biogas pressure table is except the relative merits with Bourdon tube pressure gauge, and its maximum shortcoming is that the metal bellows cost is too high, and its core material is a beryllium-bronze, and is not corrosion-resistant, can't monitor mordant gas; Sensor in rubber film formula tensimeter such as the Chinese patent " low pressure boxlike tensimeter " (patent No. is ZL92223437) is exactly a rubber film, the rubber film low price, can be used to micrometer presses, energy measurement alkanes content is at 50-60%, the hydrogen sulfide content corrosive gas about 0.02-0.04%, but its fatal shortcoming is plastic yield can occur after long-time corrosion, need by the extension spring return, accuracy class reduces, and hysterisis error is generally at about 8% of full scale.

Summary of the invention

The purpose of this utility model is to provide that a kind of measuring accuracy is higher, hysterisis error is littler, corrosion-resistant, simple in structure, make energy easy to maintenance, complete and satisfy the low pressure diaphragm-type sewage gas pressuregage of measuring the minute-pressure needs.

The purpose of this utility model is achieved in that the utility model comprises housing, sensing mechanism, the fork gear train, gear drive, the bar clamping plate, bottom plate, central rotating shaft, the indication dial plate, pointer and watch glass, the fork gear train is by fork, the fork support, dead man, rotating shaft and fork are formed, gear drive is by central gear, sector gear and hairspring are formed, below housing, be processed with inlet suction port, feature is to be processed with the inlet channel that is communicated with inlet suction port in the inwall of the back shroud of housing, the back of the termination bellows of giving vent to anger of inlet channel, sensing mechanism is made up of bellows and bellows screw, the bottom of bellows screw is fixed on the front central authorities of bellows, and an end of top and fork is movably hinged.

Sealed picture is installed outside inlet suction port.

The utility model is owing to be processed with the inlet channel that is communicated with inlet suction port on the back shroud of housing, wireway, elbow and T shape tracheae have so just been saved, not only reduced the corrosion and the error that may cause, and saved material, reduced cost because of wireway, elbow and T shape tracheae.The bellows that the utility model employing plastic tab is made is as flexible member, and select its suitable thickness as between the elastic region, bellows deforms under the pressure effect of measured medium, increased the acting force that passes to the fork gear train, thereby promote fork gear train, gear drive motion, indicated pressure has realized measuring the function of hanging down pressure reduction.The utlity model has that measuring accuracy is higher, hysterisis error is littler, corrosion-resistant, simple in structure, cost is low, manufacturing is easy to maintenance, complete energy satisfies the advantage of measuring the minute-pressure needs, its application surface is very extensive, the monitoring before being applied to methane cooker, liquefied petroleum gas stove, gas range and other low-pressure fuel gas kitchen range kitchen range behind the kitchen range, also can be applicable to the low voltage monitoring in other field.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model;

Fig. 2 looks cross-sectional view for the right side of Fig. 1.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

The utility model comprises housing 3, sensing mechanism, the fork gear train, gear drive, bar clamping plate 5, bottom plate 8, central rotating shaft 16, indication dial plate 4, pointer 2 and watch glass 1, below housing 3, be processed with inlet suction port 15, sensing mechanism is made up of bellows 11 and bellows screw 17, bottom plate 8 is fixed on the back shroud 18 of housing 3 by screw 7, the fork gear train is by fork 9, fork support 10, dead man 21, rotating shaft 20 and fork 22 are formed, the bottom of bellows screw 17 is fixed on the front central authorities of bellows 11, one end of top and fork 9 is movably hinged, gear drive is by central gear 6, sector gear 12 and hairspring 13 are formed, in the inwall of the back shroud 18 of housing 3, be processed with the inlet channel 19 that is communicated with inlet suction port 15, the back of the termination bellows 11 of giving vent to anger of inlet channel 19.

O-ring seal 14 is installed outside inlet suction port 15.

Principle of work: when measured medium by inlet suction port 15, when inlet channel 19 enters bellows 11, pressure changes the displacement that produces and passes to fork 9 by bellows screw 17, fork 9 rotates, so fork 9 drives rotating shaft 20 and rotates, dead man 21 in the rotating shaft 20 also rotates, and dead man 21 drives sector gear 12 and rotates, with central gear 6 deflections of sector gear 12 engagements, thereby drive pointer 2 deflections on the central rotating shaft 16 that is located at central gear 6, thereby indicated pressure changes.

Claims

1, a kind of low pressure diaphragm-type sewage gas pressuregage, comprise housing (3), sensing mechanism, the fork gear train, gear drive, bar clamping plate (5), bottom plate (8), central rotating shaft (16), indication dial plate (4), pointer (2) and watch glass (1), bottom plate (8) is fixed on the back shroud (18) of housing (3) by screw (7), the fork gear train is by fork (9), fork support (10), dead man (21), rotating shaft (20) and fork (22) are formed, gear drive is by central gear (6), sector gear (12) and hairspring (13) are formed, be processed with inlet suction port (15) in the below of housing (3), it is characterized in that: in the inwall of the back shroud (18) of housing (3), be processed with the inlet channel (19) that is communicated with inlet suction port (15), the back of termination bellows (11) of giving vent to anger of inlet channel (19), sensing mechanism is made up of bellows (11) and bellows screw (17), the bottom of bellows screw (17) is fixed on the front central authorities of bellows (11), and an end of top and fork (9) is movably hinged.

2, low pressure diaphragm-type sewage gas pressuregage as claimed in claim 1 is characterized in that: O-ring seal (14) is installed outside inlet suction port (15).