JPH09265322A - Valve structure for pressure governor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve structure of a pressure governor for facilitating disassembly such as the take-out of a valve body at the time of maintenance or the like. SOLUTION: A cylindrical side wall part 3a is provided on the circulation path 2 of gas from a primary side part 1a on an upstream side to a secondary side part 1b on a downstream side on the gas supply pipe line 1 of the pressure governor, an opening part 1c to the primary side part 1a or the secondary side part 1b formed at the side wall part 3a is constituted to a valve seat and a valve body 4 freely slidable along the side wall part 3a is provided. Then, the valve body 4 is provided with an opening angle adjustment part A for enlarging the opening angle of the opening part 1c accompanying the sliding of the valve body 4 from one side 3b to the other side 3c along the side wall part 3a and a flow path shut-off part C for closing the opening part 1c when the valve body 4 slides along the side wall part 3a and reaches the other side 3c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention divides a gas supply pipeline into an upstream-side primary side portion and a downstream-side secondary side portion, and distributes gas from the primary side portion to the secondary side portion. A pressure regulator provided with a pressure regulating valve that opens and closes a passage, and based on a pressure difference between the primary side portion and the secondary side portion, provided with a biasing means for biasing the pressure regulating valve in a direction for maintaining a predetermined opening position. Related to the valve structure.

[0002]

2. Description of the Related Art Conventionally, as a valve structure of a pressure regulator of this type, as shown in FIG. 2, a ring-shaped opening 1z for partitioning a primary side 1a and a secondary side 1b through which gas flows is provided. A conical valve body 4z is provided to the valve seat to be formed so as to be retractable, and when the valve body 4z abuts on the peripheral portion of the opening 1z, the opening 1z is closed, The valve body 4z is provided with a flow path blocking plate 4y formed so as to gradually increase the opening degree of the opening 1z as the valve body 4z moves in the opening 1z in a direction away from the opening 1z. hand,
It is known that when the valve body 4z is about to come out of the opening 1z, the opening 1z can be blocked.

[0003]

According to the valve structure of the conventional pressure regulator described above, the opening portion 1z is formed in the primary side portion 1.
The opening of the opening 1z is increased as a pressure difference is generated between the secondary side 1a and the secondary side 1b.
When the pressure difference becomes abnormally large such as when the pipe is broken at b, the flow passage blocking plate 4y can contact the peripheral portion of the opening 1z to shut off the flow passage 2. In normal times, the pressure regulating function between the primary side portion 1a and the secondary side portion 1b is exerted, and at the time of abnormality, the flow passage 2 is shut off. In this case, when the pressure regulator itself becomes abnormal or the pressure regulator needs to be maintained for some other reason, the valve body 4z can be removed by removing the valve body 4z.
Alternatively, since the flow path blocking plate 4y is in contact with the peripheral portion of the opening 1z and the valve body 4z cannot be pulled out from the opening 1z, the valve body 4z and the pressure regulator itself are disassembled. Since it has to go through complicated steps such as performing the above, it is easy to result in a great amount of labor and time.

Therefore, in view of the above-mentioned drawbacks, an object of the present invention is to provide a valve structure of a pressure regulator which can be easily disassembled such as taking out the valve body for maintenance or the like.

[0005]

To achieve this object, a characteristic structure of the present invention is to divide a gas supply pipeline into an upstream primary side portion and a downstream secondary side portion, A direction in which a pressure regulating valve that opens and closes a gas flow passage from the side portion to the secondary side portion is provided, and the pressure regulating valve is maintained at a predetermined opening position based on the pressure difference between the primary side portion and the secondary side portion. In the valve structure of the pressure regulator provided with the urging means for urging, the tubular side wall portion is provided in the gas flow passage from the primary side portion to the secondary side portion, and is formed on the side wall portion. An opening to the primary side portion or the secondary side portion is configured as a valve seat, and a valve body that is slidable from one side to the other side along the side wall portion is provided,
An opening adjustment unit that increases the opening of the opening as the valve body slides along the side wall, and the valve body slides along the side wall to the other side. The flow passage blocker for closing the opening is provided in the valve body when the above condition is reached, and the action and effect are as follows.

[Operation and Effect] That is, in addition to providing a cylindrical side wall portion in the gas flow passage from the primary side portion to the secondary side portion,
The valve seat is provided with an opening formed in the side wall portion to the primary side portion or the secondary side portion, and a slidable valve body is provided along the side wall portion. The opening can be opened and closed simply by sliding along the portion. Here, as the valve body slides along the side wall portion, if an opening degree adjusting portion that increases the opening degree of the opening portion is provided, the primary side portion and the secondary side portion As the pressure difference increases (decreases), the opening of the opening is increased (decreased), and the gas supply amount from the primary side to the secondary side is increased (decreased) to increase the pressure difference. The valve body can be operated so as to eliminate the above, and a pressure regulating function can be imparted to the pressure regulator using this valve structure. Further, since the valve body is provided with a flow passage blocking portion that closes the opening when the valve body slides along the side wall portion from one side to the other side and reaches the other side. , For example, when the pressure difference becomes abnormally large, for example, when the pipe is damaged on the secondary side, the flow path blocking unit can block the opening and block the flow path. At times, the flow path blocking function can be exerted. Here, since the valve body is simply configured to slide along the side wall portion, the valve body can be moved to either end of the cylindrical side wall portion without any obstruction, The valve body can be taken out from the pressure regulator by simply opening one end side of the side wall portion (opening the lid 3d (see FIG. 1) in the embodiment). Therefore, it is not necessary to perform a large amount of work when maintaining the pressure regulator, and the work efficiency can be significantly reduced.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the gas supply pipe 1
The road is divided into an upstream-side primary side portion 1a and a downstream-side secondary side portion 1b, and the primary side portion 1a to the secondary side portion 1b.
In the gas flow passage 2 to b, a vertically oriented cylindrical pressure regulating chamber 3 is provided to connect the primary side portion 1a and the secondary side portion 1b, and the pressure regulating chamber 3 has a bottomed cylindrical shape. The pressure regulating chamber 3 is equipped with the valve body 4 of
It is configured to be slidable along the side wall 3a. When the valve body 4 reaches the lower end portion 3b of the pressure regulating chamber 3, the valve body 4 covers the opening portion 1c of the primary side portion 1a, and the peripheral wall portion 4b on the upper bottom portion 4a side is covered with the cover portion. The primary side 1a to the secondary side 1 are contacted with the opening 1c of the secondary side 1b.
When the flow passage 2 for gas to b is blocked and the upper end portion of the pressure regulating chamber 3 is reached, the peripheral wall portion 4d on the side of the opening end 4c of the valve body 4 has an opening portion of the secondary side portion 1b. The gas flow passage 2 from the primary side portion 1a to the secondary side portion 1b is cut off by being in contact with 1c. Further, a large number of through holes 5 through which gas flows are provided in the peripheral wall portion 4e at the center of the valve body 4, and the valve body 4 is provided between the upper end portion 3c and the lower end portion 3b of the pressure regulating chamber 3. At a certain time, the gas is allowed to flow from the primary side portion 1a to the secondary side portion 1b.
The through-hole 5 is formed in a shape in which the width becomes narrower toward the upper bottom portion 4a.

In the pressure adjusting chamber 3, the primary side portion 1a
The pilot flow path 6 for applying the pilot pressure of the secondary side portion 1b to the side partitioned by the upper bottom portion 4a of the valve body 4.
Are provided in series, and the primary side portion 1a and the secondary side portion 1b are provided.
A levitation force acts on the valve body 4 due to the pressure difference between the valve body 4 and the valve body 4 to levitate against gravity, and as the pressure difference is eliminated, the gravity overcomes the circulation pressure of the gas and the valve body 4 descends. It is designed to be operated. Therefore, the valve body 4
Increases (decreases) as the pressure difference increases (decreases) and increases (decreases) the overlapping portion of the through hole 5 and the opening 1c to increase the opening of the opening 1c. (Small) (from (a) to (b) or (d) to (c) in FIG. 1), increasing (reducing) the gas supply amount from the primary side portion 1a to the secondary side portion 1b, The valve body 4 can be operated so as to eliminate the pressure difference, and when the valve body 4 is fully raised, the peripheral wall portion 4d on the open end 4c side of the valve body 4 has the secondary side portion 1b. From the primary side 1a to the secondary side 1
A configuration is obtained in which the gas flow passage 2 to b is blocked (see FIG. 1D), and the opening 1c as the valve seat and the valve body 4 are obtained.
The structure of the valve V consisting of In this case, the through hole 5 functions as the opening degree adjusting section A of the opening 1c, and the gravity acting on the valve body 4 and the pilot pressure applied from the pilot flow path 6 are balanced. A peripheral wall 4d on the side of the open end 4c of the valve body 4 functions as a biasing means B that biases the valve body 4 in a direction for maintaining the valve body 4 at a predetermined opening position, and serves as a flow path blocking portion C that blocks the opening 1c. work.

When disassembling the pressure regulator having such a structure of the valve V, the valve body 4 can be taken out from the pressure regulating chamber 3 simply by removing the lid 3d of the pressure regulating chamber 3, which is easy. Can be maintained.

Another Embodiment Another embodiment will be described below. In the previous embodiment, the pressure adjusting chamber 3 is provided in the vertical posture, but the present invention is not limited to this, and even in the horizontal posture, the valve body 4 moves from one side to the other side along the side wall portion 3a. It suffices that the opening 1c of the opening 1c be adjusted or shut off as it slides.

Various configurations can be adopted as the configuration for applying the pilot pressure to the side opposite to the primary side portion 1a across the valve body 4 of the pressure regulating chamber 3, so that FIG. The structure is not limited to. Further, various configurations can be adopted as the configuration for applying the pilot pressure to the side opposite to the primary side portion 1a across the valve body 4 of the pressure regulation chamber 3, so that the configuration of FIG. It is not limited. Further, the valve body 4 is not limited to the configuration that opens and closes the opening 1c to the secondary side portion 1b, but may be the configuration that opens and closes the opening portion to the primary side portion 1a, and is not limited to the above configuration. It is not something that can be done.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a valve structure of a pressure regulator of the present invention.

FIG. 2 is a conceptual diagram showing a valve structure of a conventional pressure regulator.

[Explanation of symbols]

 1 Gas Supply Pipe 1a Primary Side 1b Secondary Side 1c Opening 2 Flow Passage 3a Side Wall 3b Lower End 3c Upper End 4 Valve A A Opening Adjusting Part B Energizing Device C Channel Blocking Part V Pressure Regulator

Claims (1)

[Claims] 1. A gas supply pipe (1) is divided into an upstream primary side portion (1a) and a downstream secondary side portion (1b), and the primary side portion (1a) to the secondary side. A pressure regulating valve (V) for opening and closing the gas flow passage (2) to the portion (1b) is provided,
An urging means (B) is provided for urging the pressure regulating valve (V) in a direction to maintain it at a predetermined opening position based on the pressure difference between the primary side portion (1a) and the secondary side portion (1b). A valve structure of a pressure regulator, wherein a cylindrical side wall portion (3a) is provided in a gas flow passage (2) from the primary side portion (1a) to the secondary side portion (1b), and the side wall portion is provided. A valve body having an opening (1c) formed in (3a) to the primary side part (1a) or the secondary side part (1b) as a valve seat and slidable along the side wall part (3a). (4) is provided, and as the valve body (4) slides along the side wall portion (3a) from one side (3b) to the other side (3c), the opening (1c). When the opening degree adjusting part (A) for increasing the opening degree and the valve body (4) slides along the side wall part (3a) to reach the other side (3c), Pressure regulators valve structure is provided in a flow path blocking section which closes the mouth portion (1c) (C) and the valve element (4).