JP2878261B1 - Membrane gas meter - Google Patents

Abstract

An object of the present invention is to provide a gas meter to which a gas-related device such as an emergency shutoff valve can be attached without largely changing the configuration. A first connecting member (39, 40) for connecting a portion projecting from an upper wall (38) of each blade shaft (35, 36) to a second connecting member (43, 44) is provided in a first arm portion along the upper wall (38). 61, a second arm portion 62 formed by bending upward from the other end in the axial direction of the first arm portion, and one longitudinal end of the second connecting portions 43, 44 from the upper end of the second arm portion 62 And a third arm portion 63 connected to the third arm portion 63. Thus, a large space can be formed above the blade shafts 35 and 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a membrane gas meter, and more particularly, to a structure for additionally providing a gas measurement related device such as an emergency shutoff valve in an internal space of a gas meter housing.

[0002]

2. Description of the Related Art In recent years, in order to improve safety, the maximum measured gas flow rate is 1 m ³ / h, 3 m ³ / h, 5 m ³ / h and 7 m ³ / h.
Small gas meters called No. 1, No. 3, No. 5 and No. 7 gas meters of m ³ / h are provided with an emergency shut-off valve for shutting off a gas flow path below a gas inlet, thereby generating an earthquake and excessive gas. An abnormal occurrence such as a flow rate is detected by a seismic sensor and a flow rate detector, and the shutoff valve is automatically shut off. The addition of such an emergency shut-off valve requires that the maximum gas measurement flow provided for a large customer such as a factory is 30 m ³ / h, 50 m ³ / h, 90 m ³ / h and 1 m ³ / h.
It is also desired for large gas meters called No. 30, No. 50, No. 90 and No. 120 gas meters of 20 m ³ / h.

FIG. 43 is a cross-sectional view showing the internal structure of a typical prior art membrane gas meter 1, FIG. 44 is a cross-sectional view of the membrane gas meter 1 viewed from above in FIG.
FIG. 45 is a cross-sectional view taken along line AA of FIG. 44. The membrane gas meter 1 is a No. 50 gas meter, and basically has a housing 2, a gas meter main body 3, and a link mechanism 4.

The gas meter body 3 is connected to a pair of measuring membranes 7a and 7b provided in two measuring spaces 6a and 6b separated by a partition wall 5, respectively, and each of the measuring membranes 7a and 7b, and has upper ends 9a1 and 9b1. Are protruded from the upper wall 8 of the gas meter main body 3 and a pair of blade shafts 9a, 9b, and measuring chambers 6a1, 6 defined by measuring films 7a, 7b.
a2; valve element 10 for opening and closing 6b1 and 6b2
a, 10b, each measuring chamber 6a1, 6a2; 6b
As the gas alternately flows into the first and second baffles 1 and 6b2, the respective measuring membranes 7a and 7b are displaced in the directions of the arrows A1 and A2 (left and right directions in FIG. 45).
9b is configured to be rotated in the directions of arrows B1 and B2, respectively.

The link mechanism 4 comprises a pair of first connecting members 12a, 12b each having one longitudinal end connected to the upper ends 9a1, 9b1 of the respective blade shafts 9a, 9b,
A pair of second connecting members 13 having one longitudinal ends connected to the other longitudinal ends of the connecting members 12a and 12b, respectively.
a, 13b, a crank means 14 to which the other longitudinal ends of the second connecting members 13a, 13b are connected, a longitudinal end to the crank means 14, and the other longitudinal ends to the respective valves. A third pair of third members connected to the bodies 10a and 10b
Connecting members 15a, 15b;
By rotating b in the directions of the arrows B1 and B2, the valve body 10
a, 10b are respectively driven to be displaced in the directions of arrows C1, C2; D1, D2.

[0006]

The blade shafts 9a and 9b are provided below the gas inlet 16 of such a membrane gas meter 1.
The upper end portions 9a1 and 9b1 are arranged.
Since the longitudinal ends of the first connecting members 12a and 12b are connected to the a1 and 9b1 at substantially right angles, there is a problem that the emergency shutoff valve as described above cannot be provided. In order to solve this problem, for example, the housing 2 of the membrane gas meter 1 is formed larger than the configuration shown in FIGS.
It is conceivable to secure a large space between the upper wall and the upper wall and provide an emergency shutoff valve in this space. However, in this case, the configuration becomes large, and the number of members that change the configuration increases. There is a problem that.

An object of the present invention is to provide a gas meter which can be provided with an emergency shut-off valve without largely changing the conventional configuration.

[0008]

According to the present invention, there is provided a pair of measuring membranes provided in two measuring spaces separated by a partition, and each measuring space is divided into two measuring chambers. A gas meter body provided with a pair of blade shafts individually rotated by displacement protruding from the upper wall, and a pair of first longitudinal ends respectively connected to respective portions of each blade shaft protruding from the upper wall. The connecting member, a pair of second connecting members each having one longitudinal end connected to the other longitudinal end of each first connecting member, and the other longitudinal end of each second connecting member are respectively connected. A crank means provided with a crank shaft on a crank plate, a gas meter main body, portions protruding from the upper wall of each of the blade shafts, a first connecting member, a second connecting member, and a housing covering the crank means; 1st connection The material includes a first arm portion extending along the upper wall from one longitudinal end connected to each portion protruding from the upper wall of each wing shaft, and an end of each first arm portion near the other longitudinal end. A second arm portion that bends upward from the portion and rises, and a third arm portion that extends from the upper end of each second arm portion to one end in the longitudinal direction of the second connecting member and has the other end in the longitudinal direction. It is a film type gas meter characterized by including.

According to the present invention, the gas meter main body has a pair of measuring membranes for partitioning the two measuring spaces into two measuring chambers, respectively, similarly to the above-mentioned prior art configuration, and the gas is alternately provided in each measuring chamber. Is supplied to displace the measuring membrane, and the blade axes are rotated by the displacement. A pair of first connecting members is connected to each of the blade shafts protruding from the upper wall of the gas meter main body. In each of these first connecting members, a first arm portion connected to the projecting portion of each blade axis extends along the upper wall of the gas meter main body, and the first arm portion extends in the longitudinal direction of the first arm portion. A second arm portion connected to an end portion near the other end portion is formed to be bent upward and extend in a rising direction, and the third arm portion is configured to be connected to an upper end portion of the second arm portion.

Therefore, as compared with the configuration of the conventional gas meter, the connecting position of the first connecting member and the protruding portion of each blade shaft can be arranged adjacent to the upper wall of the gas meter main body. By reducing the amount of protrusion of the upper end of the blade shaft from the upper wall, a space for providing the emergency shutoff valve below the gas inlet can be secured. Further, by making the sum of the lengths of the first arm portion and the third arm portion of the first connecting member of the present invention the sum of the longitudinal lengths of the first connecting member of the conventional art, The rotation of each blade shaft can be transmitted to the second connecting member without greatly changing the configuration of the gas meter. Therefore, by replacing the first connecting member of the existing membrane gas meter with the first connecting member of the present invention, the above-mentioned space can be secured below the gas inlet, so that the existing membrane gas meter can be used. In addition, the present invention can be advantageously implemented, and industrial applicability can be improved.

[0011]

FIG. 1 is a sectional view showing the internal structure of a membrane gas meter 21 according to an embodiment of the present invention.
3 is a cross-sectional view of the membrane gas meter 21 as viewed from the left side of FIG. 1, and FIG. 3 is a cross-sectional view of the membrane gas meter 21 as viewed from above in FIG. The membrane gas meter 21 is a No. 30 gas meter having a maximum gas measurement flow rate of 30 m ³ / h, and basically includes a housing 22, a gas meter main body 23 provided in a lower space of the housing 22, and a gas meter main body 2.
3 and a link mechanism 24 provided on the upper part of the third. The upper space of the housing 22 is provided with an emergency shutoff valve 53 for shutting off the gas flow when an abnormality such as an earthquake or an excessive gas flow occurs, and an emergency shutoff valve is provided when the abnormal state is resolved. A return button 55 for returning the shut-off valve 53 from the closed state to the open state is provided.

The internal space of the casing 25 of the gas meter main body 23 is divided into two measuring spaces 27 and 28 by a partition 26.
The first to fourth measuring chambers 3 are partitioned by measuring films 29 and 30 provided in the measuring spaces 27 and 28, respectively.
1, 32; 33, 34. The gas meter main body 23 has a pair of blade axes 35 and 36, and each of these blade axes 3
5 and 36, the upper ends 58 and 59 of the casing 2
5 while projecting upward from the upper wall 38 of the casing 2.
5 rotatably supported. Each of these blade axes 35, 36
Are arrows A11, A12; B of the respective measuring membranes 29, 30;
Arrows C11, C1 due to displacements in the directions of 11, B12
2: Rotated in the directions D11 and D12.

The link mechanism 24 includes respective blade shafts 35 and 36.
A pair of first connecting members 39 and 40 having one longitudinal ends respectively connected to upper ends 58 and 59 protruding from the upper wall 38, and other longitudinal ends of the first connecting members 39 and 40, respectively. A pair of second connecting members 43 and 44 whose one ends in the longitudinal direction are respectively connected by pins 41 and 42, and a crank means 45 to which the other ends of the second connecting members 43 and 44 in the longitudinal direction are connected respectively. A third connecting member 46 having one longitudinal end connected to the crank means 45,
47.

FIG. 4 is a front view showing one first connecting member 39, FIG. 5 is a plan view of one first connecting member 39, and FIG. 6 is a right side view of one first connecting member 39. And
FIG. 7 is a left side view of one of the first connecting members 39. One of the first connecting members 39 includes first to third arm portions 61 and 6.
2 and 63 and a bracket 70 described later. The first arm portion 61 has a boss portion 64 having a substantially cylindrical shape and a boss portion 64 having a rectangular cross section perpendicular to the axis and having one end in the axial direction (the left and right direction in FIGS. 4 and 5). A first horizontal portion 65 connected to the outer peripheral surface, an inclined portion 66 connected to the other end in the axial direction of the first horizontal portion 65 and inclined downward in FIG. 4 as the distance from the other end in the axial direction increases; The second horizontal portion 67 is connected to the lower end of the second horizontal portion 66 and has the same width (the vertical direction in FIG. 5) as the first horizontal portion 65 and extends in the same direction.

The second arm portion 62 has a rectangular cross section perpendicular to the axis, and is bent substantially at right angles to the other axial end of the second horizontal portion 67 of the first arm portion 61 to be integrally formed. Is done. The third arm portion 63 has one end in the axial direction connected to the upper end of the second arm portion 62 and extends from the portion connected to the upper end in the same direction as the first arm portion 61. A pin insertion hole 68 for inserting the pin 41 is formed at the other end of the third arm portion 63 in the axial direction.

FIG. 8 is a sectional view taken along line VIII-VII of FIG.
It is sectional drawing seen from I. A bracket portion 70 is formed integrally with a portion where the first arm portion 61 and the second arm portion 62 are connected to each other, and the bracket portion 70 connects the first arm portion 61 and the second arm portion 62. This makes it possible to eliminate the bending caused by the pressing force and the tensile force acting from one of the second connecting members 43 via the pins 41 when the arm is rotated in the directions of the arrows C11 and C12.

FIG. 9 is an enlarged plan view showing the vicinity of the boss 64, and FIG. 10 is a cross-sectional view taken along the line XX of FIG. The boss 64 is provided at the upper end 58 of one of the blade shafts 35.
And a screw hole 72 extending in a radial direction of the insertion hole 71 from an intermediate portion of the insertion hole 71 in a direction along the central axis line 73 and having an inner screw engraved on an inner peripheral surface thereof. And The outer peripheral surface of the boss portion 64 is
A first region 74 having an arc shape with a radius R1 centered on the center axis 73 of the first region 74, and a radius R centered on the center axis 73 connected to both circumferential ends of the first region 74 via a step 75.
2 (> R1) of arc-shaped second region 76. Thus, the first region 7 on the outer peripheral surface of the boss 64
Since the boss 4 is retracted inward in the radial direction, it is possible to avoid interference with the valve box of the emergency shutoff valve 53 when the boss 64 rotates in the directions of the arrows C1 and C2. The upper end surface 77 of the boss portion 64 is connected to a portion connected to the first region 74 and the second region 7.
The portion connected to 6 is formed so as to be connected to each other via a step 75. More specifically, the portion connected to the first region 74 is formed to be retracted below the portion connected to the second region 76. This also avoids interference with the emergency shutoff valve 53.

The insertion hole 71 is continuous with the upper end surface 77,
In addition, an inclined inner peripheral surface 78 having a frustoconical shape that tapers from the upper end surface 77 toward the lower end side in the direction along the central axis 73, and the inclined inner peripheral surface 78 is continuous with the inclined inner peripheral surface 78. It is defined by a cylindrical inner peripheral surface 79 extending to the end face. In one of the first connecting members 39 of the present embodiment, the distance ΔL1 between the center axis 73 of the insertion hole 71 and the center axis of the pin insertion hole 68 (see FIG. 5) is the same as that of the existing No. 30 gas meter. Selected, for example, ΔL1 = 130.3
mm.

The first connecting member 39 thus configured
Is made of lead bronze, has high strength and excellent wear resistance. Therefore, wear in the pin insertion hole 68 into which the pin 41 connected to the second connection member 43 is inserted can be prevented, and occurrence of a measurement error can be prevented.

FIG. 11 is a front view showing the other first connecting member 40, FIG. 12 is a plan view of the other first connecting member 40, and FIG. 13 is a right side view of the other first connecting member 40. FIG. 14 is a left side view of the other first connecting member 40. The other first connecting member 40 is made of the above-described lead bronze,
And a configuration similar to the first connecting member 39,
It has first to third arm portions 81, 82, 83 and a bracket portion 70.

The first arm portion 81 has a rectangular section having a rectangular cross section perpendicular to the axis and has a horizontal portion 85 extending in the horizontal direction, and a boss portion 86 connected to one axial end of the horizontal portion 85. The boss portion 86 has an insertion hole 87 penetrating in the vertical direction in FIG. 11 for inserting the upper end portion 59 of the other blade shaft 36, and an insertion hole 87 extending from an intermediate portion of the insertion hole 87 in a direction along the axis 88. And a screw hole 89 extending in one radial direction. The outer peripheral surface of the boss portion 86 is connected to the arc-shaped first region 90 centered on the center axis 88 of the insertion hole 87 and both ends in the circumferential direction of the first region 90 via steps 91,
An arc-shaped second region 92 having a larger radius than the first region 90
Consisting of Further, the upper end surface 93 of the boss portion 86 is the first
The portion connected to the region 90 is formed to be retracted below the portion connected to the second region 92. As a result, the boss 86
Is rotated in the directions of the arrows D11 and D12, and the outer peripheral surface and the upper end surface 93 are prevented from undesirably interfering with the valve box of the emergency shut-off valve 53.

The second arm portion 82 is bent substantially at a right angle to the other end in the axial direction of the horizontal portion 85 and continues upward in FIG. 11, and has a substantially rectangular cross section perpendicular to the axis. The third arm portion 83 has one end in the axial direction connected to the upper end of the second arm portion 82, and is formed to extend from the one end in the axial direction in the same direction as the first arm portion 81. A pin insertion hole 94 into which the pin 42 is inserted is formed at the other end in the axial direction of the third arm portion 83.

The distance ΔL2 between the center axis 88 of the insertion hole 87 and the center axis of the pin insertion hole 94 is selected to be the same as that of the other first connecting member 12b of the existing No. 30 gas meter. = About 130.3 mm.

Each of the first connecting members 39 and 40 connects the upper end portions 58 and 59 of the blade shafts 35 and 36 with the insertion holes 7.
1 and 87, the screws 96 and 97 shown in FIGS. 1 to 3 are screwed into the screw holes 72 and 89, respectively, and connected to the upper ends 58 and 59, respectively. Can be.

Referring again to FIGS. 4, 5, 11 and 12, each of the second arm portions 6 of the first connecting members 39 and 40 will be described.
5 and FIG. 12 in the vertical direction are the first and third arm portions 61 and 63;
4 and 11, the thickness in the left-right direction in FIGS. 4 and 11 allows the deflection by the pressing force and the tensile force acting from each second connecting member 43, 44 via each pin 41, 42. In order to reduce the size, the thickness of each of the first and third arm portions 61 and 63; 81 and 83 (up and down direction in FIGS. 4 and 11) is selected, for example, twice as large. By increasing the thickness of each of the second arm portions 62 and 82 in this manner, the above-described deflection is reduced or eliminated, and the occurrence of a measurement error can be reduced. Moreover, since the bracket portions 70 are provided, the second arm portions 62 and 8 are provided.
The rigidity of the second arm portions 62 and 82 can be improved without unnecessarily increasing the thickness of the second arm portion 62.

Referring again to FIGS. 1 to 3, the crank means 45 includes a first connecting shaft 48 to which the other ends of the second connecting members 43 and 44 in the longitudinal direction are connected, and a third connecting member 46 and 47
, A second connecting shaft 49 to which one end in the longitudinal direction is connected, a crank plate 50 provided with the first and second connecting shafts 48, 49, and a crank shaft 51 coaxial with a rotation axis 52 of the crank plate 50. The first and second connecting members 39, 4 are rotated by the rotation of the blade shafts 35, 36 in the directions of arrows C11, C12; D11, D12.
0; and 43 and 44 are driven to rotate around the axis 52 in the direction of arrow E. Below the crank means 45, there is provided a gear device 56 for transmitting the rotation of the crank shaft 51 in the direction of arrow E to a reel counter 57 mounted on the front wall of the housing 22.

The gear device 56 includes a worm 124 fixed to the lower end of the crankshaft 51 extending in the vertical direction,
A worm gear 125 meshing with the worm 124;
An output shaft 126 to which the worm gear 125 is fixed. The output shaft 125 drives the reel counter 57 so that the gas consumption can be mechanically integrated and displayed.

The housing 22 has an upper case 116 and a lower case 117, and a caulking member is sandwiched by an annular seal member 118 interposed between the mutually facing flange portions of the upper case 116 and the lower case 117. 119 are hermetically bonded. The upper case 11
A weighing counter unit 120 is mounted on 6.
The weighing counter unit 120 includes a microcomputer, a rotary encoder, and the like.
An end plate 122 is provided at the lower end of the output shaft 121. The end plate 122 is pin-connected to the crank plate 50 together with the other longitudinal ends of the second connecting members 43 and 44. The rotation of the crank plate 50 in the direction of the arrow E is transmitted to the output shaft 121, counted by the weighing counter unit 120, and the gas flow rate is electrically detected.

The upper case 11 of the membrane gas meter 21
6 has a gas inlet 98 through which gas flows in.
And a gas outlet 99 for discharging gas, and a flow path component member 101 integrally formed with an outlet pipe 100 having the gas outlet 99 is attached to the upper part of the gas meter main body 23. A pair of valve bodies 102 and 103 made of synthetic resin are provided on the flow path constituting member 101, and the crank means 45 is driven to rotate in the direction of the arrow E through the third connecting members 46 and 47. F1, F2;
It is configured to drive alternately in the G1 and G2 directions.

The flow path forming member 101 has a first flow path 105 communicating with the first measuring chamber 31 and a second flow path 106 communicating with the second measuring chamber 32 in relation to the one measuring space 27.
A third fluid communication with the first or second flow passages 105 and 106 corresponding to the displacement of the valve body 102 in the directions of arrows F1 and F2.
In relation to the flow path 107 and the other measurement space 28, a first flow path 111 communicating with the fourth measurement chamber 34, and a third measurement chamber 33
The second flow path 112 communicating with the valve body 103 and the arrow G of the valve body 103
1st or 2nd flow path 1 corresponding to displacement in the G1 direction
A third flow path 113 communicating with the third flow path 11 and 112;
Merging space 114 into which gas flows from channels 107 and 113
And

Next, the operation will be described. FIG. 15 is an explanatory view for explaining the operation of the link mechanism 24 and each of the valve bodies 102 and 103, and FIG. 16 is a cross-sectional view for explaining the operation of each of the measuring films 29 and 30 and the valve bodies 102 and 103. is there. FIG. 15 (1) corresponds to FIG. 16 (1).
Similarly, FIGS. 15 (2) to 15 (4) correspond to FIGS. 16 (2) to 16 (4), respectively.

Referring also to FIGS. 1 to 3, gas flows in from the gas inlet 99 and passes through the valve hole 54 of the emergency shutoff valve 53, and this gas causes the gas meter main body 23 in the housing 22 and the flow path to flow. The internal space excluding the component member 101 is filled.

In the state shown in FIGS. 15 (1) and 16 (1), in one measuring space 27, one measuring film 29 is positioned at the position where the volume of the second measuring chamber 32 is maximum, that is, the arrow A11. To the left dead center, and the operation of discharging the gas in the first measuring chamber 31 is completed.
Is closed by one valve element 102. Also the second
In the measuring chamber 32, the measuring operation is completed, and the second flow path 106 is blocked by the valve body 102. At this time, one of the first connecting members 39 is disposed at a first position that is a left dead point when viewed from the right in FIG.

In the other measuring space 28, the third measuring chamber 33 is being discharged by the other measuring film 30 moving in the direction of the arrow B11, and the gas introduced into the second flow path 112 is discharged by the other valve element. The gas is guided to the confluence space 114 via the third flow path 113 by the 103, further discharged from the gas outlet 99 via the outflow pipe 100, and supplied to a gas consuming device (not shown) such as a gas burner. In addition, the fourth measuring room 3
4 is being measured, and the housing 2
A gas having a constant pressure supplied from a space above the second gas meter main body 23 flows through the first flow path 111. As a result, the other first connecting member 40 is rotated in the direction of arrow D12, and one valve body 102 is moved in the direction of arrow F.
Is driven in one direction, and the other valve body 103 has an arrow G
It is driven to be displaced in one direction.

When the valve bodies 102 and 103 are displaced in the directions of the arrows F1 and G1, respectively, FIG. 15 (2) and FIG.
As shown in (2), in one measuring space 27,
The gas from the gas inlet 98 flows into the first flow path 105 through the upper space of the housing 22, and the first measuring membrane 3
Gas flow into 1 is started. As a result, the one measuring membrane 29 is displaced in the direction of arrow A12, and the one first connecting member 39 is displaced by the displacement of the one measuring membrane 29.
Is rotated in the direction of arrow C11, the flow rate of the gas flowing into the first measuring chamber 31 is measured, and the second measuring chamber 32 is measured.
The gas inside flows into the third flow path 107 from the second flow path 106, is discharged to the outside through the merge space 114, the outflow pipe 100 and the gas outlet 99, and is supplied to the gas consuming equipment. In the other measuring space 28, the other measuring membrane 3
0 moves to the position where the volume of the fourth measuring chamber 34 is the maximum, that is, moves in the direction of the arrow B12 and is at the left dead center.
3 is completed and the other first
The connecting member 40 reaches the second position, which is the left dead center when viewed from the right in FIG.
Is blocked by

When the other valve body 103 is driven to be displaced in the direction of arrow G1 from the state shown in FIGS. 15 (2) and 16 (2), the second flow path 1 in the other measuring space 28 side.
15 is opened, and the gas flows from the gas inlet 98 into the third measuring chamber 33 to be measured, as shown in FIGS. 15 (3) and 16 (3). As a result, the other measuring membrane 30 is displaced in the direction of arrow B12, and the fourth measuring chamber 3 is displaced.
The gas extruded from 4 is guided from the first flow path 111 to the third flow path 113, discharged to the outside through the outflow pipe 100 and the gas outlet 99 into the merge space 114, and supplied to the gas consuming device. The other first connecting member 40 is rotated in the direction of arrow D11. In the one measuring space 27, the one measuring film 29 is moved to the position where the volume of the first measuring chamber 31 is maximum, that is, in the direction of the arrow A12, and is at the right dead center. 15 is completed, one of the first connecting members 39 reaches the third position, which is the right dead point when viewed from the right in FIG.
Is closed by one valve element 102.

In this manner, by the time the other first connecting member 40 rotates in the direction of arrow D11 and reaches the fourth position, which is the right dead center, one first connecting member 39 moves in the direction of arrow C12. Of the first connecting members 39, 40
With the rotation of the valve body 10 on one measuring space 27 side,
2 as shown in FIGS. 15 (4) and 16 (4), the second flow path 106 is opened and the first flow path 10
5 and the third flow path 107 are communicated, the gas in the first measuring chamber 31 flows from the first flow path 105 into the junction space 114 via the third flow path 107, and the gas is exhausted from the gas outlet 99. Supplied to

At this time, on the other measuring space 28 side, the measuring film 30 is moved to the position where the volume of the third measuring chamber 33 is maximum, that is, in the direction of the arrow B12, and is at the right dead center. 34, the operation of discharging the gas in the first flow path 11 is completed.
1 is closed by the valve body 103.

When the other first connecting member 40 reaches the fourth position at the right dead center as described above, the valve body 103 moves from the state where both the first and second flow paths 111 and 112 are closed to the arrow G2. Starting the displacement in the direction, the first flow path 111 is opened again as shown in FIGS. 15 (1) and 16 (1), whereby the gas flow port 98 into the fourth measuring chamber 34. The gas in the third measuring chamber 33 is communicated from the second flow path 112 through the third flow path 113 while the second flow path 112 and the third flow path 113 communicate with each other.
14 and supplied to the gas consuming device from the gas outlet 99.

As described above, the measuring films 28 and 29 repeat the reciprocating operation in the directions of arrows A11 and A12; B11 and B12, and the flow rates of the gases flowing into the measuring chambers 31 to 34 are measured. Even if the first connecting members 39 and 40 rotate in the directions of arrows C11 and C12; D11 and D12 due to the reciprocating operation of the measuring films 28 and 29, the second arm portions 62 and 82. Each first arm part 6
1 and 81 and the third arm portions 63 and 83 extend in the vertical direction and are connected to each other, so that the first and second arm portions 63 and 83 are not interfered by the flow path component member 101, and each of the second and third connection portions is similar to the above-described related art. Each of the valve bodies 102 and 103 can be driven for displacement via the members 43 and 44; 46 and 47.

In the configuration of the embodiment of the present invention, each of the blade shafts 35 and 36 is compared with the above-described conventional gas meter 1.
A large space for providing the emergency shutoff valve 53 can be secured by suppressing the amount of protrusion from the upper wall 38. Also, in the configuration of the membrane gas meter, the existing first connecting members are simply replaced with the first connecting members 39 and 40 of the present invention.
Since the space for providing the emergency shut-off valve 53 can be secured, the present invention can be advantageously implemented in a No. 30 membrane gas meter, and industrial applicability can be improved.

As described above, the gas flow from the valve hole 54 is generated in the internal space of the housing 22 except for the gas meter main body 23 and the flow path constituent member 101. The two side surfaces 150, 151 in the direction perpendicular to the rotation directions C11, C12; D11, D12 are closer to each other as they become centered in the width direction (left-right direction in FIG. 8) of each of the second arm portions 62, 82. The ridge 152 which is inclined and is close to the end forms a part of the cylindrical surface, and the both side surfaces 15 are smoothly formed.
0, 151, the flow resistance to the gas when the first connecting members 39, 40 rotate is small, and therefore, the turbulence of the gas flow can be reduced.

FIG. 17 is a front view showing one first connecting member 39a according to another embodiment of the present invention, FIG. 18 is a plan view of one first connecting member 39a, and FIG. 20 is a right side view of the first connecting member 39a, and FIG. 20 is a left side view of one of the first connecting members 39a. FIG.
Is the other first connecting member 4 according to another embodiment of the present invention.
FIG. 22 is a plan view of the other first connecting member 40a, and FIG. 23 is a plan view of the other first connecting member 40a.
FIG. 24 is a left side view of FIG.
It is a left view of 0a. Each of the first connecting members 39a and 40a of this embodiment is similar to the configuration of the embodiment shown in FIGS. 1 to 17 described above, and the corresponding parts are denoted by the same reference numerals but with the suffix a.

The first connecting members 39a, 4a of this embodiment
It should be noted that the distances ΔL1a, ΔL between the central axes 73a, 88a of the insertion holes 71a, 87a of the bosses 64a, 86a and the central axes of the pin insertion holes 68a, 94a.
As 2a can be implemented on the existing No. 50 gas meter,
For example, ΔL1a = ΔL2a = about 171.6 mm. When these first connecting members 39a and 40a are applied to an existing No. 50 gas meter, the valve box of the emergency shut-off valve 53 is connected to the boss portions 64a and 86a.
Are arranged at a position separated from. Therefore, each boss 6
The outer peripheral surfaces of 4a and 86a are formed in a cylindrical shape, whereby the occurrence of turbulence in the flow of gas from valve hole 54 can be reduced.

At the lower ends in the axial direction of the insertion holes 71a, 87a, which open at the lower end surfaces of the boss portions 64a, 86a, there are formed truncated cone-shaped inclined inner peripheral surfaces which are tapered toward the bottom. .

FIG. 25 is a sectional view showing the internal structure of a membrane gas meter 21b according to still another embodiment of the present invention, and FIG. 26 is a membrane gas meter 2 viewed from the left side in FIG.
FIG. 27 is a sectional view of the film-type gas meter 21b viewed from above in FIG. The film-type gas meter 21b of this embodiment is similar to the configuration of each of the embodiments shown in FIGS. 1 to 24 described above.

The membrane gas meter 21b of this embodiment is
It is a No. 120 gas meter having a maximum gas measurement flow rate of 120 m ³ / h.
Third arm portion 63 of each first connecting member 39b, 40b
b, 83b.

FIG. 28 is a front view showing one first connecting member 39b, FIG. 29 is a bottom view showing one first connecting member 39b, and FIG. 30 is a plan view showing one first connecting member 39b. FIG. 31 shows one of the first connecting members 39b.
32 is a right side view showing FIG. 32, and FIG.
It is a left view which shows 9b.

The first connecting member 39b includes the first to third arm portions 61b, 62b, 63b and the bracket 7
0b. The first arm portion 61b includes a boss 64b, an arc-shaped leg 132 integrally connected to a lower end of the boss 64b, an arm body 69b integrally connected to a lower end of the leg 132, and a rib 144. It is comprised including. The arm body 69b is bent at one axial end portion 130 where the boss portion 64b is continuous, and extends along the upper wall 38 of the gas meter main body 23 from the bent portion to the other axial end portion.

The second arm portion 62b is bent upward at right angles to the other end of the first arm portion 61b in the axial direction, and is connected to the first arm portion 91b by the bracket portion 70b. It is configured to be something. The third arm portion 63b includes the first and second
The arm portions 61b and 62b are formed to extend in an axial direction that intersects one virtual plane including the respective axes. This third
A pin insertion hole 68b for inserting the pin 41b is formed at the end of the arm portion 63b opposite to the side connected to the upper end of the second arm portion 62b.

FIG. 33 is an enlarged plan view showing the vicinity of the boss 64b, and FIG. 34 is a sectional view taken along the line HH in FIG. The boss portion 64b has an insertion hole 71b for inserting the upper end portion 58b of one blade shaft 35b, and an insertion hole 7b.
A screw hole 72b having an axis perpendicular to the central axis 73b of 1b and having an inner screw carved in the inner peripheral surface is formed. The outer peripheral surface of the boss 64b is connected to a first region 74b centered on the center axis 73b of the insertion hole 71b, and to the lower end of the first region 74b in the axial direction. Frustum-shaped second region 76
b. These first and second regions 7
4b, 76b and a rib 144 are provided on the outer peripheral surface of the leg 132, whereby the arm body 69 is provided.
The connection state between b and the boss portion 64b can be made stronger as compared with a configuration in which the rib 144 is not provided.

The insertion hole 71b is continuous with the upper end surface of the boss portion 64b, and is tapered toward the lower end side in the direction along the central axis line 73b.
And a cylindrical inner peripheral surface 79b connected to one end of the inclined inner peripheral surface 78b in the axial direction and opened at the lower end surface of the boss 64b.
Defined by This one first connecting member 39b
Is attached to the upper end 58b of one blade shaft 35b as shown in FIG.
5, the packing 133 of the upper end portion 58b is fitted and closely attached, whereby the first connecting member 39b can be turned in the directions of the arrows C11 and C12 without rattling.

FIG. 35 is an end view taken along the line JJ in FIG. Arm body 69b and second arm portion 6
2b are connected to the bent portion of FIG.
4, the bracket portion 70b is formed, so that one of the second connecting members 43b via the pin 41b when rotating in the directions of the arrows C11 and C12.
Since the deflection caused by the pressing force and the tensile force acting on the gas is small or eliminated, the occurrence of the measurement error of the gas can be reduced, and the flow resistance to the gas is small, so that the turbulence of the gas flow can be reduced.

FIG. 36 is a front view of the other first connecting member 40b, FIG. 37 is a bottom view of the other first connecting member 40b, and FIG. 38 is a plan view of the other first connecting member 40b. 39 is a right side view of the other first connecting member 40b, and FIG. 40 is a left side view of the other first connecting member 40b. The other first connecting member 40b includes first to third arm portions 81b to 83b and a bracket portion 70b. The first arm portion 81b includes a horizontal portion 85b extending along the upper wall 38b of the gas meter main body 23b.
And a boss portion 86 b bent and connected to one end side of the horizontal portion 85 in the axial direction, and a rib 147.

FIG. 41 is an enlarged plan view showing the vicinity of the boss portion 86b, and FIG. 42 is a sectional view taken along the line KK of FIG. The boss portion 86b is connected to the other blade shaft 40b.
An insertion hole 87b into which the upper end of the insertion hole 87b is inserted, and a screw hole 89b having an axis perpendicular to the central axis 88 of the insertion hole 87b and having an internal thread formed on the inner peripheral surface. The insertion hole 8
7b is a cylindrical inner peripheral surface 95b opening at the lower end surface of the boss portion 86b, and a frustoconical inclined inner peripheral surface 91 connected to the upper end portion of the cylindrical inner peripheral surface 95b and opening at the upper end surface of the boss portion 86b.
b. On the outer periphery of the boss 86b,
A rib 147 is formed to make the connection between the boss portion 86b and the horizontal portion 85b stronger.

The axis of each pin insertion hole 68b, 94b of each of the first connecting members 39b, 40b and each blade shaft 35b, 36
b insertion holes 71b into which the upper end portions 58b and 59b of
Each of the distances ΔL1b and ΔL2b with the 87b is selected in the same manner as the longitudinal length of the first connecting member provided in the existing No. 120 gas meter, and for example, L3 = L4 = 21
It is selected to be about 4.1 mm. With this configuration, the first gas meter of the present invention can be added to the existing No. 120 gas meter.
The connecting members 39b and 40b can be attached, the present invention can be advantageously implemented, and industrial applicability can be improved.

The first connecting members 39b and 40b for the No. 120 gas meter of the present embodiment have the same size and shape as the existing No. 90 gas meter and the existing No. 120 gas meter. It can also be implemented advantageously.

In each of the above-described embodiments, a large space is secured in the housings 22 and 22b so that the emergency shutoff valve 5 is provided.
Although the gas shutoff valves 3 and 53b are provided, other gas measurement related devices may be provided instead of the emergency shutoff valves 53 and 53b.

[0059]

As described above, according to the present invention, the connecting position between the first connecting member and the protruding portion of each blade shaft can be arranged adjacent to the upper wall of the gas meter main body. By reducing the amount of protrusion of the upper end of the blade shaft from the upper wall, a space for providing the emergency shutoff valve below the gas inlet can be secured. In addition, by replacing the first connecting member of the existing membrane gas meter with the first connecting member of the present invention, the above-described space can be secured below the gas inflow port. The present invention can be advantageously implemented, and industrial applicability can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an internal structure of a film-type gas meter 21 according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view of the film-type gas meter 21 as viewed from the left side in FIG.

FIG. 3 is a cross-sectional view of the film-type gas meter 21 as viewed from above in FIG.

4 is a front view of one first connecting member 39. FIG.

FIG. 5 is a plan view of one first connecting member 39;

6 is a right side view of one first connecting member 39. FIG.

FIG. 7 is a left side view of one first connecting member 39;

FIG. 8 is a sectional view taken along section line VIII-VIII in FIG. 4;

FIG. 9 is an enlarged plan view showing the vicinity of a boss portion 64;

FIG. 10 is a cross-sectional view taken along line XX of FIG. 9;

11 is a front view of the other first connecting member 40. FIG.

12 is a plan view of the other first connecting member 40. FIG.

13 is a right side view of the other first connecting member 40. FIG.

14 is a left side view of the other first connecting member 40. FIG.

FIG. 15 shows a link mechanism 24 and respective valve bodies 102 and 103.
FIG. 5 is an explanatory diagram for explaining the operation of FIG.

FIG. 16 shows each measuring membrane 29, 30 and each valve element 102, 1;
FIG. 13 is a cross-sectional view for explaining the operation of No. 03.

FIG. 17 is a front view showing one first connecting member 39a according to another embodiment of the present invention.

FIG. 18 is a plan view of one first connecting member 39a.

FIG. 19 is a right side view of one first connecting member 39a.

FIG. 20 is a left side view of one first connecting member 39a.

FIG. 21 is a front view of another first connecting member 40a according to another embodiment of the present invention.

FIG. 22 is a plan view of the other first connecting member 40a.

FIG. 23 is a right side view of the other first connecting member 40a.

FIG. 24 is a left side view of the other first connecting member 40a.

FIG. 25 is a sectional view showing an internal structure of a film-type gas meter 21b according to still another embodiment of the present invention.

26 is a film-type gas meter 21 viewed from the left side of FIG. 25.
It is sectional drawing of b.

27 is a film-type gas meter 21b viewed from above in FIG. 25.
FIG.

FIG. 28 is a front view of one first connecting member 39b.

FIG. 29 is a bottom view of one first connecting member 39b.

FIG. 30 is a plan view of one first connecting member 39b.

FIG. 31 is a right side view of one first connecting member 39b.

FIG. 32 is a left side view of one first connecting member 39b.

FIG. 33 is an enlarged plan view showing the vicinity of a boss portion 64b.

34 is a cross-sectional view taken along the line HH of FIG. 33.

FIG. 35 is an end view as viewed from the section line JJ of FIG. 31;

FIG. 36 is a front view of the other first connecting member 40b.

FIG. 37 is a bottom view of the other first connecting member 40b.

FIG. 38 is a plan view of the other first connecting member 40b.

FIG. 39 is a right side view of the other first connecting member 40b.

FIG. 40 is a left side view of the other first connecting member 40b.

FIG. 41 is an enlarged plan view showing the vicinity of a boss portion 86b.

FIG. 42 is a cross-sectional view taken along section line KK in FIG. 41.

FIG. 43 is a cross-sectional view showing the internal structure of a typical prior art membrane gas meter 1.

FIG. 44 is a cross-sectional view of the film-type gas meter 1 as viewed from above in FIG. 43.

FIG. 45 is a cross-sectional view of the film-type gas meter 1 taken along the line AA in FIG. 44.

[Explanation of symbols]

21, 21b Membrane gas meter 22, 22b Housing 23, 23b Gas meter main body 26, 26b Partition wall 27, 28, 27b, 28b Measurement space 29, 30, 29b, 30b Measurement film 31-34, 31b-34b First to fourth measurement Chamber 35, 36, 35b, 36b Blade axis 38, 38b Upper wall 39, 40, 39a, 39b, 40a, 40b First connecting member 43, 44, 43b, 44b Second connecting member 45, 45b Crank means 50, 50b Crank Plates 51, 51b Crankshafts 53, 53b Emergency shut-off pieces 61-63, 61a-63a, 61b-63b, 81-
83, 81a to 83a, 81b to 83b First to third arm portions

Continuing from the front page (72) Inventor Norihiro Fujimoto 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Osaka Gas Co., Ltd. (72) Inventor Hajime Onoda 1-3-2 Shimura, Itabashi-ku, Tokyo Stock Company Inside Kinmon Works (72) Inventor Takayuki Okamoto 4-7-131 Nishiiwata, Higashi-Osaka-shi, Osaka Kinmon Works, Kansai Research Institute (58) Field surveyed (Int. Cl. ⁶ , DB name) G01F 3 / twenty two

Claims (1)

(57) [Claims] 1. A pair of weighing membranes provided in two weighing spaces partitioned by partition walls, each partitioning each weighing space into two weighing chambers, and individually rotating by displacement of each weighing membrane. A gas meter main body provided with a blade axis protruding from the upper wall; a pair of first connecting members each having one longitudinal end connected to each part protruding from the upper wall of each blade axis; A pair of second connecting members each having one longitudinal end connected to the other longitudinal end of the member, and a crankshaft provided on a crank plate to which the other longitudinal end of each second connecting member is respectively connected. A crank means, a gas meter main body, portions protruding from the upper wall of each of the blade shafts, a first connecting member, a second connecting member, and a housing covering the crank means; The upper wall of the shaft First extending along the top wall from one longitudinal end portion connected to each portion projecting
An arm portion, a second arm portion that bends upward from an end near the other end in the longitudinal direction of each first arm portion and rises, and a longitudinal direction of the second connecting member from an upper end portion of each second arm portion A third arm portion extending over one end and having the other end in the longitudinal direction.