JP2002014731A - Pressure regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain desired secondary pressure by solving the problem that a conventional pressure regulator is unable to obtain the desired secondary pressure since the pressure loss in the regulator is large when gas of pressure smaller than the range that the regulator can use as primary pressure is supplied. SOLUTION: This pressure regulator includes a spring 10, diaphragms 6 and 7, and a valve body 9 and discharges secondary-side gas by controlling the pressure of supplied primary-side gas. Thereby, both of a state wherein the pressure of the primary-side gas is not controlled and a state wherein the primary-side gas has its pressure controlled and is supplied to the secondary side can be set. Further, the pressure regulator is equipped with a means for fixing the valve body 9 at a specific position; and a person presses a valve rod 8 down and fixes it at a specific position, and when the pressure of the primary-side gas becomes higher than a specific value, the valve rod 8 is automatically released from being fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure regulator for regulating a gas such as city gas from a supplied primary gas to a lower gas pressure and discharging the gas as a secondary gas.

[0002]

2. Description of the Related Art Conventionally, in order to supply city gas to each customer, for example, gas reduced to a predetermined pressure (about 1.96 KPa) at a governor station is supplied to each customer through a supply pipe. Accordingly, the gas appliances of each customer are adjusted so that they can be used at the supply pressure. In addition, supply pipes from the governor station to each customer are laid with pipes that are sized to meet the demand.

[0003]

When supplying city gas to each household, as shown in FIG. 1, high-pressure gas from a supply source is reduced to a predetermined pressure by a governor station and then supplied to each consumer. I have. Therefore, each consumer's gas appliance is adjusted to be used at that supply pressure. In recent years, various uses such as gas heating and hot water bath have been developed, and it is expected that the demand for gas will increase rapidly. In order to supply gas, gas pipes are laid, but in order to respond to the above-mentioned increase in demand for gas by customers, the laid gas pipes should be pipes of a size corresponding to that. It is necessary to renew, but the cost and time required for this will be enormous,
It cannot respond to a sudden increase in gas demand. Therefore, as an alternative to renewal of the piping, the gas pressure is increased and supplied to the existing piping, for example, to about 4.9 KPa, and a pressure regulator is installed at the entrance of each customer, thereby reducing the pressure to the conventional pressure. A supply method has been proposed for use in such applications.

[0004] However, since there are many thousands to tens of thousands of households that can be served by one governor station, it takes time to install the pressure regulators in all of the customers, and until one installation is completed, the pressure regulator is installed in one governor station. There are customers who have installed pressure regulators and customers who do not, in the block to be served. Even in such a state, the pressure regulator is required to:
That is, a gas of a predetermined pressure can also be supplied to all of the customers, and even if the installation of the pressure regulator is completed for all of the customers and the operation is started with the gas pressure increased, the same as before is provided to each of the customers. It must be able to supply gas regulated to a predetermined pressure.

However, the conventional pressure regulator has a problem that when a gas having a pressure smaller than a range usable by the regulator is supplied as a primary pressure, a desired secondary pressure cannot be obtained due to a large pressure loss in the regulator. Have. The present invention solves the above-mentioned problems, and supplies the gas to the customer as a secondary pressure gas without adjusting the pressure at the present primary pressure, and automatically adjusts the pressure at the primary pressure gas when the pressure is increased. It is an object of the present invention to provide a pressure regulator that can supply a gas to a customer as a gas of the next pressure.

[0006]

SUMMARY OF THE INVENTION The present invention is a pressure regulator including a spring, a diaphragm, and a valve element, which regulates a supplied primary gas to flow as a secondary gas, wherein the pressure of the primary gas is regulated. Without flowing as secondary gas,
It is characterized in that it is possible to set a state in which the primary gas is regulated and flow as a secondary gas, and further includes a spring, a diaphragm and a valve element, and regulates the supplied primary gas to regulate the secondary gas. A pressure regulator flowing as a secondary gas, comprising means for fixing a valve body at a predetermined position, and further comprising means for fixing the valve body at a predetermined position, wherein The valve is fixed by pressing down the rod to fix the valve rod at a predetermined position, and when the gas pressure of the primary side gas becomes higher than a predetermined value, the valve rod is automatically unlocked.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When supplying city gas to each customer, as shown in FIG. 1, high-pressure gas from a supply source is reduced to a predetermined pressure (about 1.96 KPa) by a governor station, and then each demand is reduced. Supplying the house. Accordingly, the gas appliances of each customer are adjusted so that they can be used at the supply pressure. It is said that the number of consumers served by one governor station ranges from thousands to tens of thousands of households. ing.

In recent years, various uses such as gas heating and hot water bath have been developed, and it is expected that the demand for gas by consumers will increase sharply. In order to supply gas, gas pipes are laid.However, due to the sudden increase in demand for gas by the above-mentioned customers, the current pipes are in short supply, and as a method of increasing supply capacity, they are laid. It is necessary to update the pipe for the gas that has been increased in size, but the cost and time required for this are enormous. Therefore, as an alternative to renewal of piping, a method of supplying gas at a high pressure, installing a pressure regulator at the entrance of each customer, and reducing the pressure to the conventional pressure (about 1.96 KPa) for use. Has been proposed.

However, as described above, since a single governor station supplies a large number of customers, it takes a considerable amount of time to install a pressure regulator in each customer. For this reason, during the period when the pressure regulators are installed in all the customers, there are some customers who have installed the pressure regulators and some customers who have not, and the gas appliances in each of the consumers are at the conventional pressure (about 1). The pressure regulator can supply gas to the secondary side without adjusting the pressure of the gas whose primary pressure is the conventional pressure (about 1.96 KPa). (A function just as a joint) When the primary pressure is raised and the operation is started, a function capable of adjusting the secondary pressure to the conventional pressure (about 1.96 KPa) is required. Moreover, the pressure regulator can be set in a state where the pressure is not adjusted by manual operation at the time of installing the regulator. Function is required. The present invention has been created after the inventors have repeated various trials and errors in order to cope with the above circumstances.

An embodiment of a pressure regulator according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a pressure regulator of the present invention. In the figure, reference numeral 1 denotes a first housing, 2 denotes a second housing, 3 denotes a third housing, and the three members constitute a valve box. A third housing 3 is provided with a gas inlet 4 at a primary pressure and a gas outlet 5 at a secondary pressure. A first diaphragm 6 is provided between the first housing 1 and the second housing 2, thereby defining a space A and a space B. Furthermore, the second housing 2
Is provided with a second diaphragm 7, which separates the space A from the space C and makes the space A hermetically closed. The first diaphragm 6 and the second diaphragm 7 are inserted, and a valve stem 8 is provided so as to interlock with the movement of the first diaphragm 6. A valve body 9 is attached to the lower end of the valve stem 8. In addition, the valve body 8 is adapted to interlock with the movement of the first diaphragm 6. Further, a push rod 81 is provided to extend above the valve rod 8, and a lock rod 82 is provided to extend below the valve body 9 of the valve rod 8.
A lock device 14 is provided in the third housing 3 so that the lower end of the lock rod 82 is inserted.

A spring 10 is provided on the upper surface of the first diaphragm 6 so as to press the first diaphragm 6 with an appropriate pressing force by an adapter 11, and the adapter 11 is provided with a screw provided in the first housing 1. The pressing force of the spring 10 against the first diaphragm is adjusted by screwing with the part 101 and moving the adapter 11 forward and backward. A pressure guiding tube 13 is provided so as to penetrate through the second housing 2 so that the space E and the space A communicate with each other.
A secondary pressure of gas is introduced into the space A.

3 and 4 are cross-sectional views showing an engagement relationship between the lock device 14 and the lock rod 82. FIG. 3 shows an unlocked state, and FIG. 4 shows a locked state. In the unlocked state, the lock rod 82 and the valve rod 8 connected thereto can freely move upward in FIG. 3, and in the locked state, the lock rod 82 is fixed at that position. An adapter 142 is elastically inserted into the inner cylinder 141 of the lock device 14 via a spring 143, and holds a ball 145 between the tapered portion 1421 of the adapter 142 and the cover 144. The lock rod 82 has a valley 821, a peak 822, and a straight portion 823, and the valley 8
21 and the straight portion 823 have the same diameter.

Next, the process of changing from the unlocked state shown in FIG. 3 to the locked state shown in FIG. 4 will be described. When the push rod 81 is pushed down in the state of FIG. 3, the ball 145 is pushed out in the outer peripheral direction by one side taper of the crest 822 of the lock rod 81, and the adapter 14 is pressed.
The adapter 142 is connected to the spring 143 with the second tapered portion 1421.
Press down against When the ball 154 climbs over the peak 822 of the lock rod 82, the adapter 142 and the ball 145 are pushed upward by the spring 143, and the ball 145 is moved to the valley 8 of the lock rod 82.
The lock rod 82 is fixed between the cover 21, the cover 144, and the adapter 142, and eventually the lock rod 82 is in the locked state shown in FIG. The lock state shown in FIG. 4 can be changed from the locked state shown in FIG. 3 to the unlocked state shown in FIG. 3 by performing the operation opposite to that described above by pulling the lock rod 82 upward.

Next, the operation of the pressure regulator of the present invention will be described. A case in which the primary pressure gas of 1.96 KPa is supplied at present and the primary pressure gas of 4.9 KPa is switched in the future will be described. In this case, a pressure regulator for adjusting the primary gas pressure of 4.9 KPa to a secondary gas pressure of 1.96 KPa is attached to each customer, but the primary gas pressure is kept at 1.30 KPa until all customers have installed the pressure regulator. Operate at 96 KPa. At that time, the customer who has not yet installed the pressure regulator may remain as it is, but the customer who has installed the pressure regulator must keep the pressure regulator inoperative. At that time, when using the pressure regulator of the present invention,
When the pressure regulator is attached, push rod 81
, And the valve rod 9 and the lock rod 82 are locked by the lock device 14 as shown in FIG. By doing so, the gap between the valve body 9 and the valve seat 201 is extremely large, and the valve body 9 is fixed, so that this pressure regulator is as if it were a mere joint. By doing so, the primary gas at 1.96 KPa can be almost 1.96 KPa.
It is supplied to each customer as a secondary gas of Pa.

Next, when the pressure regulators are installed in all the consumers and the operation is started at the primary gas pressure of 4.9 KPa, the pressure regulator of the present invention automatically adjusts the pressure without any manual operation. Is to start. At the beginning when the gas pressure on the primary side is increased to 4.9 KPa, the lock between the valve body 9 and the valve seat 201 is still large because the lock is not released as shown in FIG. Without flowing into the space D, and the pressure in the space A also increases through the pressure guiding tube 13. The strength of the spring 10 for restraining the first diaphragm 6 is set so that the first diaphragm 6 stops when the inside of the space A reaches 1.96 KPa (the inside of the space A becomes 1.96 KPa). 3), the first diaphragm 6 is pushed upward by the increased gas pressure, and at the same time, the valve rod 8 and the lock rod 82 are pulled up to unlock the lock device 14 and unlock the lock device 14 shown in FIG. The state is locked, and the pressure adjustment operation is started.

At this time, the strength of the spring 143 pressing the adapter 142 mounted in the lock device 14 is 1.9.
The lock is not released at the secondary gas pressure of about 6 KPa,
It is necessary to set so that the lock is released at the secondary gas pressure of about 2.45 KPa or more. As shown in FIG. 3, when the unlocked state is reached, the ball 145 of the lock device 14 and the lock rod 82 have a positional relationship as shown, and the lock rod 82 or the valve rod 8 can move freely upward in the figure. become able to. The fact that the valve stem 8 can be freely moved indicates that the pressure can be adjusted unintentionally. Since the subsequent pressure regulation operation is the same as that of the existing pressure regulator, the description is omitted.

In the present embodiment, the lock device is a mechanical lock mechanism. However, the present invention is not limited to this. For example, a lock device using magnetism may be used. Further, in the present embodiment, the locked state is manually set, that is, the state in which the gas on the primary side flows to the secondary side without adjusting the pressure. However, when the primary pressure is reduced, the locked state may be automatically set. Good. In short, the pressure adjusting operation is performed at a primary pressure equal to or higher than a predetermined pressure, and the pressure adjusting operation is not performed at a pressure lower than the predetermined pressure.

[0018]

The present invention solves the above-mentioned problems, and supplies a secondary pressure gas to a customer without adjusting the pressure at the current primary pressure, and automatically supplies the gas at the primary pressure at a raised primary pressure. A pressure regulator capable of starting the pressure regulation operation and supplying the gas to the customer as the current secondary pressure gas can be provided.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a gas supply route.

FIG. 2 is a sectional view showing a pressure regulator of the present invention.

FIG. 3 is a cross-sectional view of a lock device according to the pressure regulator of the present invention, showing an unlocked state.

FIG. 4 is a sectional view of a lock device according to the pressure regulator of the present invention, showing a locked state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st housing, 2 2nd housing, 3rd housing, 6 1st diaphragm, 7 2nd diaphragm, 8 valve stem, 9 valve body, 10 spring, 13
Pressure guide tube, 14 locking device, 81 push rod, 8
2 Lock rod, 143 spring, 144 adapter, 145 ball,

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Kawahito 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Masakatsu Midome 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo F-term (reference) within Gas Co., Ltd.

Claims (3)

[Claims] 1. A pressure regulator including a spring, a diaphragm, and a valve body, which regulates supplied primary gas to flow as a secondary gas, and flows the primary gas as a secondary gas without regulating the pressure. A pressure regulator characterized in that a state and a state in which a primary gas is regulated to flow as a secondary gas can be set. 2. A pressure regulator including a spring, a diaphragm, and a valve body, wherein the pressure regulator regulates the supplied primary gas to flow as a secondary gas, and has a means for fixing the valve body at a predetermined position. A pressure regulator characterized by: 3. A means for fixing a valve body at a predetermined position,
A means for manually fixing the valve stem by pressing down the valve stem, and automatically unlocking the valve stem when the gas pressure of the primary gas becomes higher than a predetermined value. Item 2. The pressure regulator according to Item 1.