JPH078959Y2 - Gas pressure regulator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention regulates high-pressure liquefied gas stored in an LPG cylinder into low-pressure household propane gas, and supplies this regulated gas to a gas meter. It relates to a gas pressure regulator.

[Problems to be solved by conventional techniques and devices]

Conventionally, this type of gas pressure regulator generally has an intermediate pressure adjusting unit that lowers the high-pressure liquefied gas from the LPG cylinder to an intermediate-pressure gas, and the gas regulated by this intermediate-pressure adjusting unit is used at a predetermined low-pressure home. It consists of a low-pressure adjusting unit that further adjusts the propane gas for use,
The low pressure adjusting section is generally constructed as shown in FIG.

In the figure, the pressure adjusting chamber a of the low pressure adjusting unit is connected to the pressure adjusting chamber (not shown) of the medium pressure adjusting unit by a gas passage b. A valve hole c is provided in the gas passage b, and a pressure adjusting valve body e is brought into contact with and separated from a valve seat d of the valve hole c so that the gas pressure in the pressure adjusting chamber a is maintained at a predetermined pressure. ing. One end of a lever g rotatably supported by a support shaft f is connected to the pressure regulating valve body e, and the other end of the lever g is provided with an operating rod provided at the center of a diaphragm i biased by a spring h. j are connected.

With the above configuration, when the pressure of the gas in the pressure adjusting chamber a becomes lower than a predetermined pressure and the diaphragm i is lowered by the urging force of the spring h, the pressure regulating valve body e is valved by the lever g connected to the operating rod j. Separated from the seat d, the valve hole c
Then, the medium pressure gas from the medium pressure adjusting unit is introduced into the pressure adjusting chamber a of the low pressure adjusting unit, and the pressure in the pressure adjusting chamber a is increased. As a result, the gas pressure of the gas flowing out of the pressure adjusting chamber a is also increased, and the gas is adjusted to a predetermined pressure.

When the gas pressure in the pressure adjusting chamber a rises above a predetermined gas pressure, the diaphragm i is resisted against the urging force of the spring h.
Is lifted, the pressure regulating valve body e is brought into contact with the valve seat d by the lever g connected to the operating rod j, and the valve hole c is closed, so that the medium pressure gas from the medium pressure adjusting section enters the pressure adjusting chamber a of the low pressure adjusting section. By not introducing the gas, the gas pressure is reduced to a predetermined pressure to adjust the pressure.

As described above, the gas pressure adjustment in the low pressure adjusting unit is performed by opening and closing the valve hole c between the intermediate pressure adjusting unit and the low pressure adjusting unit by the pressure adjusting valve body e, but the pressure adjusting valve body e is operated. In addition, since the deformation of the diaphragm i is transmitted to the pressure regulating valve body e via the operating rod j and the lever g, there is a dimensional error in each member, the valve seat d, the pressure regulating valve body e and the lever g. If there is a displacement in connection of the lever g, the support shaft f of the lever g, the connection of the operating rod j of the lever g, the attachment of the operating rod j to the diaphragm i, etc. The diaphragm i cannot maintain the horizontal position due to the pressure.

Generally, when the diaphragm i is deformed vertically from a horizontal state in a certain range, the pressure-displacement characteristic operates so as to maintain linearity. However, if the diaphragm i largely deviates from the horizontal position, the linearity cannot be maintained and a desired pressure regulation is achieved. It becomes impossible to operate.

Therefore, conventionally, this problem has been dealt with, for example, by finely adjusting the position of the support shaft f of the lever g, but this method causes a problem that the mechanism is complicated and the adjustment work is difficult. There was a point.

Therefore, the present invention has been made in view of the above-mentioned problems of the conventional ones.
An object of the present invention is to provide a gas pressure regulator in which a diaphragm that deforms according to the gas pressure in the pressure adjusting chamber of the low pressure adjusting unit can be easily adjusted to a horizontal state.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a gas pressure regulator made according to the present invention comprises an intermediate pressure adjusting section for adjusting a high pressure liquefied gas contained in an LPG cylinder to a predetermined intermediate pressure, and an intermediate pressure adjusting section. A low-pressure adjusting unit that adjusts the pressure of the compressed gas to a predetermined low pressure, a diaphragm that deforms according to the gas pressure in the pressure adjusting chamber of the low-pressure adjusting unit, a lever that is rotated according to the deformation of the diaphragm, and the lever. And opening and closing a valve hole provided in the gas passage between the pressure adjusting chamber of the intermediate pressure adjusting unit and the pressure adjusting chamber of the low pressure adjusting unit to set the gas pressure in the pressure adjusting chamber of the low pressure adjusting unit to a predetermined value. In the gas pressure regulator that has a pressure regulating valve body that holds the value of, and supplies the gas regulated in the low pressure regulating section to the gas meter, the other end of the operating rod that has the screw section at one end of the pressure regulating valve body. The operating rod with the threaded portion. A screw hole formed in the screw hole, and the screw portion screwed into the screw hole is further screwed with a lot lot to connect the pressure regulating valve body to the lever, and a screwdriver screw is provided at the tip of the screw portion. Is formed.

[Action]

With the above configuration, the pressure regulating valve body connected to the lever that is rotated by the deformation of the diaphragm in accordance with the gas pressure in the pressure adjusting chamber of the low pressure adjusting unit is connected to the pressure adjusting chamber of the intermediate pressure adjusting unit by the rotation of the lever. A valve hole provided in a gas passage between the low pressure adjusting unit and the pressure adjusting chamber is opened and closed, and the gas pressure in the pressure adjusting chamber of the low pressure adjusting unit is maintained at a predetermined value by opening and closing the valve hole. The pressure regulating valve body is supported by the other end of the operating rod having a threaded portion at one end, and is connected to the lever by screwing the threaded portion of the operating rod into a holding hole provided in the lever. This connected state is fixed by further screwing a lock nut to the holding portion of the operating rod screwed into the screw hole,
There is no misalignment. Also, since the driver groove is formed at the tip of the screw part of the operating rod,
By loosening the lock nut, the operating rod can be easily moved for adjustment.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 are views showing an embodiment of a gas pressure regulator according to the present invention, which is configured to be integrated with a gas meter and adapted to form a hybrid gas meter,
In the figure, 3 is a gas pressure regulator, 6 is a gas meter, and the gas pressure regulator 3 and the gas meter 6 have a gas outlet 3a of the gas pressure regulator 3 arranged above the gas meter 6 and a gas inlet of the gas meter 6. By connecting to 6a, they are integrated to form a hybrid gas meter.

The gas pressure regulator 3 includes a medium pressure regulator 31 with an automatic cylinder switching mechanism, a low pressure regulator 32, and a dummy gas passage 33. The gas inlet 33a of the dummy gas passage 33 is formed such that the distance between the gas outlet 3a of the gas pressure regulator 3 is equal to the distance between the gas inlet 6a and the gas outlet 6b of the gas meter 6. ing. The gas pressure regulator is provided between the gas outlet 3a of the gas pressure regulator 3 and the gas inlet 6a of the gas meter 6, and between the gas inlet 33a of the dummy gas passage 33 and the gas outlet 3b of the gas meter 6. The pipes forming the gas inflow port 6a and the gas outflow port 3b of the gas meter 6 are fitted into the gas outflow port 3a and the gas outflow port 33a of No. 3, respectively, via a panquise seal, or via a connecting joint pipe. The gas pressure regulator 3 is supported by being connected to the gas meter 6 in this state.

In either case, one of the gas pressure regulator 3 and the gas meter 6 can be easily replaced, and when a connecting pipe is used, the gas pressure regulator 3 of the present invention is compatible with existing gas meters. The connection can be made easily.

The gas outlet 33b of the dummy gas passage 33 is formed substantially in the center of the upper surface of the gas pressure regulator 3, and a gas pipe is connected to the gas outlet 33b to regulate the gas meter 6 by the gas pressure regulator 3. The measured gas is supplied to the gas equipment through this pipe.

The medium pressure adjusting unit 31 with the automatic cylinder switching mechanism is provided with high pressure gas inlets 31a and 31b, which are respectively connected to the high pressure hoses from the LPG cylinder, facing each other on the left and right. The intermediate pressure adjusting unit 31 is provided with a manual switching knob 31c. By operating the manual switching knob 31c to rotate the rotary shaft 31d, the cam body 31e integral with the rotary shaft 31d is rotated. One of the high pressure gas inlets 31a and 31b can be set as the main inlet and the other can be set as the auxiliary inlet.

Further, in the intermediate pressure adjusting unit 31, when the gas pressure in the pressure adjusting chamber 31f becomes lower than the gas pressure set by the pressure setting spring 31g, the diaphragm 31h deforms inside the pressure adjusting chamber 31f and the cam body 31e descends. By doing so, the valve body 31i provided in the gas flow path between the main inlet 31a and the pressure adjusting chamber 31f is opened via the lever 31j and the operating rod 31j ′, and the high pressure gas of the gas cylinder is introduced into the pressure adjusting chamber 31f and pressure is applied. The pressure in the adjustment chamber 31f is increased. When the amount of gas remaining in the LPG cylinder connected to the main inlet becomes too small to maintain the pressure in the pressure adjusting chamber 31f at the set pressure, the cam body 31e further descends and the valve body on the auxiliary inlet side (Fig. The LPG cylinder is automatically switched by operating a lever (not shown) via a lever and an operating rod (not shown).

Each of the levers 31j is rotatably supported by a support shaft 31j ₁ , and one end portion 31j ₂ of the lever 31j operates an operating rod 31j ′.
One end of the cam body 31e is supported by a pivot, and the other end 31j ₃ extends so as to intersect with each other, and the cam surface of the cam body 31e faces the extension. With this configuration, the valve holes opened and closed by the valve body 31i can be arranged close to each other, and the gas pressure regulator 3 can be downsized.

Further, the valve body 31i which is secured to the other end of the operating rod 31j 'is biased in the valve closing direction by a pyramid shaped coil springs 31i _1, it is positioning in place by the coil spring 31i ₁ . With this configuration, the operating rod 31
It is not necessary to slide and guide j ′ through the valve hole that is opened and closed by the valve body 31i, and the valve hole can be opened and closed reliably.

Furthermore, the intermediate pressure adjusting unit 31, the pressure adjusting chamber 31f of the diaphragm 31h drain discharge hole 31k in the lowest portion of the parallel bottom surface is opened, the drain pot housing hole 31 ₁ for communicating with the drain discharge hole 31k A pipe-shaped portion 31 is provided so as to project forward so as to be formed in the lower wall that defines the pressure adjusting chamber 31f along the front-rear direction. This is a drain pot accommodating hole 31 _1, the valve 31 ₄ for closing the drain discharge hole 31k is housed in a state of being abutted against the stopper pin 31 ₃ is urged by a spring 31 _2. In the drain pot accommodating hole 31 ₁ there is also a cap screw 31 ₅
The drain pot 31o is held by screwing the drain pot 31o onto the threaded portion 31 ₆ on the outer periphery of the pipe-shaped portion 31, and the drain pot 31o is brought into contact with the valve 31 ₄ to move the valve 31 ₄ against the spring 31 _2. By doing so, the drain discharge hole 31k is opened. 31p is a cap screw
The drain discharge hole 31k with the drain pot 31o held in the drain pot accommodating hole 31 ₁ by the screwing of 31 ₅
It is an O-ring that acts as a packing that seals the.

A gas passage 34 connecting the medium pressure adjusting unit 31 and the low pressure adjusting unit 32.
A valve hole 35 is formed in the vertical direction in the valve hole 35, and valve seats 35a ₁ and 31a ₂ are formed in the valve hole 35 on the side of the intermediate pressure adjusting portion 31 and the side of the low pressure adjusting portion 32, respectively. Is opened / closed by contacting / separating the valve seat 35a ₁ with the pressure regulating valve body 35b and the valve seat 35a ₂ with the manual closing valve body 35c.

The low-pressure adjusting section 32 is composed of a pressure adjusting chamber 32b and a pressure detecting chamber 32c which are partitioned by the partition wall 3 by a, and the intermediate pressure adjusting section 31 is communicated with the pressure adjusting chamber 32b through the valve hole 35. The dummy gas passage 33 communicates with the detection chamber 32c (not shown).
Are communicated via. A diaphragm 32f urged by a spring 32e is arranged in the pressure detection chamber 32c, and an operating rod 32g provided at the center of the diaphragm 32f penetrates the partition wall 32a and projects into the pressure adjustment chamber 32b. Above low pressure adjustment unit 3
The lever 32h, one end of which is connected to the tip of the operating rod 32g protruding into the pressure adjusting chamber 32b, has the other end rotatably supported by the support shaft 32h _1. The pressure regulating valve body 35b is connected. The pressure regulating valve body 35b is supported at the other end of the operating rod 35b ₁ having a screw portion 35b ₂ at _one end. An adjusting nut 35b ₄ having a circumferential groove 35b ₃ on the outer periphery and a hexagonal lock nut 35b ₅ are screwed into the threaded portion 35b ₂ of the operating rod 35b ₁ , and the double nut operates the nut 35b ₄ . The position of the screw portion 35b ₂ of the rod 35b ₁ is fixed. A driver groove 35b ₆ is formed at the tip of the screw portion 35b ₂ . In addition, the circumferential groove of the nut 35b ₄ above
Both side walls of an elongated hole 32h ₂ formed in the lever 32h are non-rotatably fitted to the 35b ₃ so that the pressure regulating valve body 35b is connected to the lever 32h. Incidentally, a portion of the elongated hole 32h ₂ is the circumferential groove of the nut 35b ₄
The large diameter portion 32h ₃ is formed in consideration of workability when fitting the 35b ₃ .

Reference numeral 32i is a diaphragm for allowing the operating rod 32g inserted through the partition wall 32a to move while maintaining the airtightness between the pressure adjusting chamber 32b and the pressure sensing chamber 32c. Also, the pressure adjustment chamber
A gas outlet 3a into which the gas inlet 6a of the gas meter 6 is fitted and connected is opened at 32b.

With the above configuration, the gas pressure drops below a predetermined pressure, and the diaphragm 32f is urged by the urging force of the spring 32e.
When the lever is lowered, the pressure regulating valve element 35b is separated from the valve seat 35a ₁ by the lever 32h connected to the operating rod 32e, the valve hole 35 is opened, the pressure in the pressure regulating chamber 32b is increased, and the gas pressure is regulated to a predetermined pressure. Press.

Further, when the gas pressure rises above a predetermined pressure, the diaphragm 32f is raised against the biasing force of the spring 32e, and the lever 32h connected to the operating rod 32e causes the pressure regulating valve element 35b to contact the valve seat 35a _1. The valve hole 35 is closed and the gas pressure in the pressure adjusting chamber 32b is reduced to a predetermined pressure to perform pressure adjustment.

The manual shut-off valve body 35c is fixed to one end of a rotary shaft 35e that is biased in the closing direction by a spring 35d. Rotating shaft 35e
Is penetrated through the wall of the pressure adjusting chamber 31f of the intermediate pressure adjusting portion 31 and is projected to the outside, and a manual cock 35f is fixed to the other end. The manual cock 35f is in contact with the cam surface 35g, and by rotating the manual cock 35f, the rotary shaft 35e is moved against the spring 35d so that the manual stop valve body 35c is moved. valve hole 35 is opened is separated from the valve seat 35a _2, the rotation shaft 35e being set to contact with the bottom portion of the cam surface 35g is moved in the urging direction of the spring 35d manual shutoff valve body by the rotation operation 35c seat
The valve hole 35 is closed by being pressed against 35a ₂ .

In the above configuration, by removing the lower lid 3d of the gas pressure regulator 3, as shown in FIG. 4, Lot nut 35b ₅
And the driver groove 35b ₆ of the operating rod 35b ₁ which is screwed with this appear, so loosen the lot nut 35b ₅ to remove the driver groove 35b ₆
The rotating insert a driver groove, by moving vertically with respect to the actuating rod 35b ₁ lever 32h, it is possible to adjust the diaphragm 32f so that the horizontal at a predetermined pressure. After the adjustment is completed, the lot nut 35b ₅ is then tightened so that the adjustment position of the operating rod 35b ₁ with respect to the lever 32h can be fixed so as not to shift.

In the illustrated embodiment, a screw hole for screwing the screw portion 35b ₂ of the operating rod 35b _1, the adjusting nut 35b into the long hole 32h ₂ levers 32h
The circumferential groove 35b ₃ of ₄ but be provided on the lever 32h by fitting, may be formed directly threaded hole in the lever 32h.

〔effect〕

As described above, according to the present invention, the threaded portion at one end of the operating rod supporting the pressure regulating valve body at the other end is screwed into the screw hole provided in the lever and the operating rod screwed into the screw hole. The lock nut is loosely screwed into the threaded part, and the lock nut is loosened and the driver is inserted into the driver groove at the tip of the threaded part of the operating rod, which allows the operating rod to be easily moved and adjusted. In addition, the adjusted position can be fixed by tightening the lock nut screwed to the screw part of the operating rod, and the diaphragm that deforms according to the gas pressure in the pressure adjustment chamber of the low pressure adjustment part is in a horizontal state. The effect is that it can be easily adjusted.

[Brief description of drawings]

1 to 4 show an embodiment of a gas pressure regulator according to the present invention. FIG. 1 is a partially cutaway side view, FIG. 2 is a partially cutaway top view, and FIG. 3 is gas pressure. FIG. 4 is a sectional view of the regulator, FIG. 4 is a bottom view with a part removed, and FIG. 5 is a diagram showing an example of a conventional gas pressure regulator. 3 ... Gas pressure regulator, 31 ... Medium pressure regulator, 31f ... Pressure regulator, 32 ... Low pressure regulator, 32c ... Pressure regulator, 32f ... Diaphragm, 32h ... Lever, 34 ... Gas passage, 35 ... Valve hole, 35b ... Pressure regulating valve body, 35b ₁ ... Operating rod, 35b ₂ ... Screw part, 35b ₄ ... Adjusting nut, 35b ₅ ... Lock nut, 35b ₆ ... Driver groove.

Claims (1)

[Scope of utility model registration request] 1. A medium-pressure adjusting unit for adjusting a high-pressure liquefied gas housed in an LPG cylinder to a predetermined medium pressure, and a low-pressure adjusting unit for adjusting the gas regulated by the medium-pressure adjusting unit to a predetermined low pressure. Section, a diaphragm that deforms according to the gas pressure in the pressure adjusting chamber of the low pressure adjusting unit, a lever that rotates according to the deformation of the diaphragm, and a pressure adjusting chamber of the intermediate pressure adjusting unit that is connected to the lever. And a pressure regulating valve body for holding a gas pressure in the pressure regulating chamber of the low pressure regulating unit at a predetermined value by opening and closing a valve hole provided in a gas passage between the pressure regulating chamber of the low pressure regulating unit, In a gas pressure regulator for supplying a gas metered with gas regulated in the low-pressure regulating section, the pressure regulating valve body is supported at the other end of an operating rod having a screw portion at one end, and the screw portion of the operating rod is provided at the lever. Screw into the screw hole provided in the A gas pressure regulator, characterized in that a lock nut is further screwed onto the combined screw portion to connect the pressure regulating valve body to the lever, and a driver groove is formed at the tip of the screw portion.