CN2303274Y

CN2303274Y - Diaphagm type oxygen flow rate and accumulating volume meter

Info

Publication number: CN2303274Y
Application number: CN 97206086
Authority: CN
Inventors: 王玉鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-22
Filing date: 1997-02-22
Publication date: 1999-01-06
Anticipated expiration: 2007-02-22

Abstract

The utility model relates to a leather diaphragm volume type meter which is used for metering the oxygen in a pipeline. The utility model comprises a meter body, and a machine core, wherein, the meter body is composed of an upper cover, a gas inlet, a gas outlet, and a lower casing; the machine core is composed of a leather diaphragm, a gas chamber box, a gas exhaust pipeline, a gas distributing valve, and a crankshaft connecting rod mechanism. The utility model is characterized in that the upper side of the gas exhaust pipeline is provided with a pressure equalizer which is formed into a bell-shaped hollow colloid, and the top end of the utility model is provided with an incision which is used for controlling the opening pressure. The utility model solves the problem that the leather diaphragm of the meter is easy to wear. The pressure difference between both sides of the leather diaphragm can be controlled to work normally in a safety range. The utility model is suitable for metering various high pressure gases.

Description

Membrane type oxygen flow cummulative metering table

The utility model relates to a kind of measurement instrument, in particular for the epithelium volumetric metering table of pipeline oxygen stoichiometry.

At present, the factory that oxygen consuming amount is bigger, ore deposit, hospital all change steel cylinder and store oxygen for storing liquid oxygen, use pipeline transportation, and this just requires the gauging table decapacitation to bear outside the pressure of 1MPa, also require highly sensitively, and measurement range is big, and price is low, and is easy to use, safeguards simply.But existing all kinds of measuring instrument,, turbine type wheeled, differential pressure type, float-type and epithelium formula etc. as waist, what have is insensitive, and the measurement range that has is little, and the need that have are joined complicated electronic circuit, and the price that has is too high.With existing skin diaphragm gauge, promptly common gas piping is the example explanation with table, adopts the soft frivolous epithelium of a kind of piston action in its movement, does not have the gap during work, and is air tight, do not have friction, and sensitivity is higher.The epithelium both sides be as long as the pressure reduction of 50Pa can turn round, but can not surpass 0.005MPa, otherwise epithelium promptly can be damaged or be leaked gas, and for the less piped gas of pressure surge, this table can meet the demands.And it is higher for orthicon road this pressure of oxygen, and the bigger gas that fluctuates, in case when supplying gas suddenly or exitting, because the inertia effect of the mechanical part of movement, this moment, the pressure reduction of epithelium both sides may go beyond the limit moment, leaked gas and can not work on and epithelium is broken or produce pin hole.

The purpose of this utility model is to overcome the deficiencies in the prior art, and existing epithelium formula gauging table is improved, even have under the bigger fluctuation impact at pressure, also can protect epithelium injury-free, makes table energy operate as normal.

The structure of the utility model primary structure and existing gas meter is basic identical, comprise table body and movement, the table body is made up of loam cake, air inlet/outlet, lower casing, movement is made up of epithelium, air chamber box, gas exhaust duct, distributing valve, crankshaft connecting rod system, difference is, one equalization of pressure device is installed on its gas exhaust duct, and this equalization of pressure device can be higher safety valve of sensitivity or blowdown valve.

This equalization of pressure device can also be a bell hollow colloid, and there is the otch of one may command opening pressure on its top, and when body internal pressure differences during greater than certain value, otch is promptly opened, and pressure differential is during less than certain value, and is promptly closed voluntarily, makes epithelium unlikely impaired.

The utility model has solved the easily impaired difficult problem of gauging table epithelium, the pressure differential of may command epithelium both sides operate as normal in the scope of safety, and it is low, highly sensitive to have a cost, and the advantage of convenient operation and management is applicable to the metering of various gases at high pressure.

Description of drawings:

Accompanying drawing is the structure principle chart of the utility model embodiment.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Accompanying drawing is depicted as an epithelium formula gauging table, and its primary structure and existing gas meter are basic identical.Its shell is made up of loam cake 7 and lower casing 13, and lower casing 13 both sides have air intake opening 4 and gas outlet 10.Its core section has 1,14, two distributing valves of two air chamber boxes, 6,8, two cover bent axle linkage assemblys 5,9.With right air chamber box 1 is example, and two chambeies about epithelium 2 therefrom is divided into air chamber box 1 are when gas enters a chamber, promote epithelium 2 and move, drive crankshaft connecting rod system 5 and produce power, make gauge outfit rotate counting, and promote distributing valve 6 and move, thereby air inlet and exhaust are rotated in two chambeies about making.Gas outlet 11 is contained between the 2 air chambers box 1,14, and its vent port connects on the gas outlet 10 of lower casing 13, and its two air admission hole communicates with distributing valve 6,8.Also has an opening on the wall of gas outlet 11; one equalization of pressure device 12 is housed on the opening; this equalization of pressure device 12 is for being a bell hollow colloid; its inner chamber communicates with the air inlet side; the outside is in gas outlet 11 pipelines; its top has otch 3 one, and the size of otch 3 is controlled at the pressure differential that guarantees the epithelium both sides and is no more than 0.002MPa, thereby the protection epithelium is injury-free.

Claims

1, a kind of membrane type oxygen flow cummulative metering table, structure comprises table body and movement, the table body is made up of loam cake [7], air inlet/outlet [4,10], lower casing [13], movement is made up of epithelium [2], air chamber box [1,14], gas exhaust duct [11], distributing valve [6,8], crankshaft connecting rod system [5,9], it is characterized in that: equalization of pressure device [12] is installed on gas exhaust duct [11], and this equalization of pressure device [12] can be higher safety valve of sensitivity or blowdown valve

2, gauging table according to claim 1 is characterized in that: equalization of pressure device [12] is a bell hollow colloid, and there is the otch [3] of one may command opening pressure on its top.