CN201392219Y

CN201392219Y - Membrane type gas meter measuring room

Info

Publication number: CN201392219Y
Application number: CN200920023206U
Authority: CN
Inventors: 邹积健
Original assignee: RONGCHENG YUXIANG INDUSTRIAL Co Ltd
Current assignee: RONGCHENG YUXIANG INDUSTRIAL Co Ltd
Priority date: 2009-03-05
Filing date: 2009-03-05
Publication date: 2010-01-27
Anticipated expiration: 2019-03-05

Abstract

The utility model relates to a membrane type gas meter measuring room comprising a machine core, an outer membrane and a door cover, wherein the door cover closes the machine core; a distribution passage is arranged above the machine core; the periphery of the outer membrane is riveted by an annular edge pressing ring to be hermetically fixed on a core body of the machine core; a parallel plate and a folded plate assembly are embedded and clamped at both sides of the bottom of the outer membrane, wherein the folded plate assembly is connected with a vertical shaft embedded into the machine core in a transmission way; a position of the core body of the machine core, which corresponds to the outer membrane, is provided with an outer membrane limiting surface, the outer membrane spacing surface is positioned at a limitation work position of the outer membrane and is characterized in that another limitation work position of the outer membrane is provided with a limiting ring, the limiting ring and the annular edge pressing ring are arranged into an integer, and the outer membrane limiting surface is a truncated cone-shaped surface; a machine core limiting surface is matched with the limiting ring so as to prevent the outer membrane from generating stretching or elastic deformation due to the superabundant instant flow rate of gas at different limitation work positions. The utility model has the advantages of simple structure, easy and convenient assembly, low cost and high measuring precision.

Description

Diaphragm type gas meter measuring room

Technical field

The utility model relate to a kind of be used for gas, have flexible mobilizable tank wall, telescopic measuring room when use measuring, especially a kind of diaphragm type gas meter measuring room.

Background technology

We know that two measuring rooms are arranged in the table of diaphragm gas meter, each indoor being equipped with immersion oil skiver or synthetic rubber epithelium that make, that have a constant volume.The thrust of epithelium motion is the gas pressure difference that relies on gas meter, flow meter air inlet/outlet place.In tested gas enters a measuring room, the pressure, push epithelium that is produced moves and the thrust that produces (torque that the vertical shaft that just epithelium affected rotates) to opposite side, when epithelium moves to the extreme position of opposite side, moment can not allow epithelium return next power in generation, just must produce same power in succession by the interior epithelium of second measuring room drives previous epithelium and returns mobile, pass through fork, connecting rod goes to affect a common crank axle to do continuous rotation, and drive rotary valve by its and change the air inlet/outlet direction and drive counting assembly, reach the purpose of continuous automatic gauge.This shows that the stable of epithelium volume has decisive role to gas meter, flow meter performance stable.

Existing disclosed diaphragm gas meter, its each measuring room includes movement and door closure, between door closure and movement epithelium is installed, and epithelium is directly to be gripped by movement and door closure.For example on April 16th, 2008 Granted publication CN201047767Y China utility model patent instructions in disclose a kind of like this diaphragm type gas meter measuring room of structure in disclosed " steel shell diaphragm gas meter ".At present, also have the diaphragm type gas meter measuring room of another kind of structure on market, the edge of the epithelium in this measuring room is to be fixed on the boss of movement by an annular trim ring, and such structure has played better sealing, fixing effect to epithelium.But the gas meter, flow meter of said structure in the course of the work, and when its moment, flow surpassed maximum flow, epithelium was behind the working position that reaches capacity, under the effect of gaseous-pressure, epithelium very easily produces and stretches or elastic deformation, thereby has changed the volume of epithelium, has caused gas meter, flow meter measuring accuracy step-down.

Summary of the invention

Epithelium easily produces deformation and causes the low deficiency of measuring accuracy, the utility model that a kind of diaphragm type gas meter measuring room is provided in the prior art in order to overcome, and this diaphragm type gas meter measuring room not only its assembly epithelium is not yielding, the measuring accuracy height, and assemble easy, reliable operation, cost is low.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of diaphragm type gas meter measuring room, be by movement, the door closure of epithelium and sealing movement is formed, above movement, be provided with gas distribution channels, its periphery of described epithelium is to be fixed on the core body of movement by an annular blank holder riveted joint sealing, one parallel-plate and flap component chimeric are clamped in the both sides of epithelium bottom, this flap assembly is in transmission connection with the vertical shaft that stretches in the movement, corresponding epithelium is provided with the epithelium confined planes on the core body of movement, this epithelium confined planes is in a maximal work position of epithelium, it is characterized in that: another maximal work position at epithelium is provided with a spacing ring, this spacing ring and described annular blank holder are wholely set, and its confined planes is truncated cone-shaped.

The utility model has prevented that effectively epithelium from stretching or elastic deformation because of combustion gas produced when moment, flow was excessive owing to be provided with a spacing ring in another working limit position of epithelium when another maximal work position, thereby improves the measuring accuracy of gas meter, flow meter.Spacing ring and annular blank holder are wholely set, and assemble easyly, and cost is low.The contrast prior art, the utlity model has simple in structure, the assembling easy, the advantage that cost is low, measuring accuracy is high.

Description of drawings

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

Fig. 1 is a kind of structure master's cut-open view of the present utility model.

Fig. 2 is that A among Fig. 1 is to view.

1. movements among the figure, 2. epithelium, 3. door closure, 4. gas distribution channels, 5. blank holder, 6. parallel-plate, 7. flap assembly, 8. vertical shaft, 9. core body epithelium confined planes, 10. spacing ring, 1001. confined planes.

Embodiment

In Fig. 1, a kind of diaphragm type gas meter measuring room is made up of the door closure 3 of movement 1, epithelium 2 and sealing movement 1.What adopt between this door closure 3 and the movement 1 is that the ultrasonic friction welded closure is fixed.

Offer gas distribution channels 4 above movement 1, tested gas gas distribution channels 4 thus enters in the measuring room.

As shown in Figure 1, be designed on the periphery with epithelium 2 flange shape.Core body correspondence at movement 1 contacts the corresponding assembling groove that has on the installation position with epithelium.One annular blank holder 5 adopts ultrasonic riveted joint to cooperate with movement 1 core body, the flange perimeter of epithelium 2 is sealed be fixed in the assembling groove of movement core body.

In Fig. 1, a parallel-plate 6 and flap assembly 7 setting-ins are clamped in the both sides of epithelium 2 bottoms.Wherein the structure of flap assembly 7 is identical with existing public structure, all forms (show among the figure and provide) by flap pedestal and flap.

Flap assembly 7 is in transmission connection with the vertical shaft 8 that stretches in the movement 1.It is in transmission connection is in the following way: flap one end and flap pedestal are hinged, and the other end is connected (show among the figure and provide) with the vertical shaft key.As shown in Figure 1, when tested gas enters a side measurement chamber of epithelium 2 by gas distribution channels 4 in, parallel-plate 6 moving linearlies of the pressure, push epithelium bottom that is produced, and make epithelium 2 move the position of the limit that reaches opposite side to opposite side.Epithelium 2 moves and can affect vertical shaft 8 to rotate through flap assembly 7, thereby makes vertical shaft 8 produce torques, for the rotary valve and the counter of gas meter, flow meter provides power.

Corresponding epithelium 2 is shaped on epithelium confined planes 9 on the core body of movement 1.As shown in Figure 1, this epithelium confined planes 9 is truncated cone-shaped of position, is a maximal work position that is in epithelium 2.Produce because of combustion gas moment flow is excessive when the epithelium confined planes 9 on this core body prevents effectively that epithelium 2 is in this maximal work position and stretch or elastic deformation.

As shown in Figure 1, be provided with a spacing ring 10 in another maximal work position of epithelium 2.

As shown in Figure 2, be wholely set with annular blank holder 5 on this spacing ring 10, it is easy that this kind design has assembling, the advantage that cost is low.

By Fig. 1, Fig. 2 as seen, the confined planes 1001 of spacing ring 10 also is truncated cone-shaped.Produce because of combustion gas moment flow is excessive when the confined planes 1001 of this spacing ring 10 can prevent effectively equally that epithelium is in this maximal work position and stretch or elastic deformation, thereby improve the measuring accuracy of gas meter, flow meter.

The utlity model has simple in structure, assembling is easy, cost is low, measuring accuracy is high and epithelium uses The advantage that life-span is long.

Claims

1, a kind of diaphragm type gas meter measuring room, be by movement, the door closure of epithelium and sealing movement is formed, above movement, be provided with gas distribution channels, its periphery of described epithelium is to be fixed on the core body of movement by an annular blank holder riveted joint sealing, one parallel-plate and flap component chimeric are clamped in the both sides of epithelium bottom, this flap assembly is in transmission connection with the vertical shaft that stretches in the movement, corresponding epithelium is provided with the epithelium confined planes on the core body of movement, this epithelium confined planes is in a maximal work position of epithelium, it is characterized in that: another maximal work position at epithelium is provided with a spacing ring, described spacing ring and described annular blank holder are wholely set, and its confined planes is truncated cone-shaped.