JP2003097740A - L-type gas cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an L-type gas cock allowing reduction of decrease in a gas flow rate. SOLUTION: Inside a cock body 1, a valve accepting port 11 rotatably including a valve element 2, a gas inflow port 12 opening to bottom face 11a of the valve accepting port 11 and a gas outflow port 13 opening to internal peripheral face of the valve accepting port 11 are formed. On the valve element 2, a communication port 21 having an upstream side end part 21a opening to an end face 2a of the valve element 2 and a downstream side end part 21b opening to an outer peripheral face 2b of the valve element 2 is formed. A downstream side end part 12b of the gas inflow port 12 is inclined such that it comes to the downstream side end part 21b of the communication side 21 when opening as it comes from the upstream side to the downstream side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an L-shaped gas plug in which a gas inflow hole and a gas outflow hole formed in a main body of a plug form an angle of substantially right angles.

[0002]

2. Description of the Related Art Generally, an L-shaped gas plug has a plug body having a valve housing hole formed therein and a valve body housed in the valve housing hole so as to be rotatable between an open position and a closed position. ing. A gas inflow hole and a gas outflow hole extending in directions orthogonal to each other are formed inside the plug body. The downstream end of the gas inflow hole opens at the bottom surface of the valve housing hole (the surface that faces the direction of the rotation axis of the valve body), and the upstream end of the gas outflow hole has the inner peripheral surface of the valve housing hole (valve). It is opened on the surface that faces the direction orthogonal to the rotation axis of the body. On the other hand, the valve body has a communication hole formed therethrough. This communication hole is bent at a substantially right angle because the gas inflow hole and the gas outflow hole extend in a direction substantially orthogonal to each other, and the upstream end thereof is located at the end surface of the valve body facing the gas inflow hole. It opens and is in constant communication with the gas inflow hole. The downstream end of the communication hole opens on the outer peripheral surface of the valve body (the surface that faces the direction orthogonal to the rotation axis of the valve body), and when the valve body is rotated to the open position, the gas outlet hole Communicate. As a result, the gas inflow hole and the gas outflow hole communicate with each other through the communication hole, and the gas plug is opened. On the other hand, when the valve body is rotated to the closed position,
The downstream end of the communication hole is separated from the gas outflow hole in the circumferential direction of the valve body. As a result, the gas inflow hole and the gas outflow hole are blocked by the valve body, and the gas plug is closed.

[0003]

In the above-mentioned conventional L-type gas plug, since the communication hole is bent at a right angle, the flow direction of the gas flowing from the gas inflow hole into the communication hole is also a right angle in the communication hole. Can be bent into. Therefore, there is a problem that the gas pressure loss in the communication hole is large and the gas flow rate is reduced.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an L-type gas plug capable of reducing a decrease in gas flow rate, and in order to solve such a problem, an internal valve is provided. The plug body includes a plug body having a housing hole formed therein, and a valve body housed in the valve housing hole of the plug body so as to be rotatable between an open position and a closed position. A gas inflow hole that opens in the inner surface of the valve accommodating hole that faces the direction of the axis of rotation of the valve body, and an inner surface of the valve accommodating hole whose upstream end faces in a direction substantially orthogonal to the axis of rotation of the valve body. A gas outflow hole is formed in the valve body, and an upstream end of the valve body is opened to an outer surface of the valve body that faces the direction of the rotation axis of the valve body, and a downstream end of the valve body forms a rotation axis of the valve body. A communication hole is formed which is open to the outer surface and extends in a direction substantially orthogonal to the upstream side end of the communication hole. The downstream end of the communication hole communicates with the gas outflow hole when the valve body is located at the open position, and from the gas outflow hole when the valve body is located at the closed position. In the L-shaped gas plug that is cut off from the gas outlet hole by being separated in the circumferential direction of the valve element, the downstream end of the gas inlet hole is moved from the upstream side to the downstream side of the gas inlet hole. Therefore, it is characterized in that it is inclined toward the downstream side end of the communication hole when opened. Of the opening ends on the inner surface of the valve accommodation hole at the downstream end of the gas inflow hole, at least one of the one side and the other side in the axial direction of the downstream end of the communication hole is defined as the communication hole. It is desirable that the opening end of the upstream side end substantially coincides with one side part in the same direction. In particular,
Among the opening ends on the inner surface of the valve accommodation hole at the downstream end of the gas inflow hole, the side away from the downstream end of the communication hole is the communication hole at the opening end of the upstream end of the communication hole. It is desirable that it substantially coincides with the side away from the downstream end of the.
Further, it is desirable to incline the upstream end of the communication hole such that the inclination direction when opened is the same as the inclination direction of the downstream end of the gas inflow hole.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a first embodiment of the present invention. The L-shaped gas stopper A of this embodiment includes a stopper body 1 and a valve body 2. A valve accommodating hole 11, a gas inflow hole 12, and a gas outflow hole 13 are formed inside the plug body 1. Although the valve accommodating hole 11 is formed in a tapered hole shape, it may be formed in a spherical shape or another shape.

The gas inflow hole 12 is formed with its axis aligned with the valve accommodation hole 11 except for the downstream end 12b. The upstream end 12a of the gas inflow hole 12 opens at one end surface (lower end surface in FIG. 1) of the plug body 1 that faces the axial direction of the valve housing hole 11, and the downstream end 12b has a small diameter of the valve housing hole 11. It is opened to the bottom surface (the inner surface of the valve accommodating hole 11 facing the rotation axis direction of the valve body 2) 11a on the side. Gas inflow hole 1
The joint device 3 is provided in a portion other than the downstream end portion 11 b of 2. A flexible gas pipe (not shown), which is a primary pipe, is connected to the gas inflow hole 12 via the joint device 3, and gas is supplied from the flexible gas pipe. A gas pipe having rigidity may be connected to the gas inflow hole 12 by, for example, screwing.

The gas outflow hole 13 extends in a direction orthogonal to the axis of the valve accommodating hole 11. The upstream end portion 13a of the gas outflow hole 13 is open to the inner peripheral surface (the inner surface of the valve housing hole 11 facing the direction orthogonal to the rotation axis of the valve body 2) 11b of the valve housing hole 11 and the downstream end 13 b is open at the tip end surface of the protrusion 14 formed on the outer surface of the plug body 1. The protrusion 14 is
It extends parallel to the gas outflow hole 13, and the base end of the connection nut 4 is rotatably and airtightly fitted to the outer periphery of the gas outflow hole 13. A gas device (not shown) such as a gas pipe or a gas appliance is screwed and fixed to the taper female screw portion 41 formed on the inner peripheral surface of the tip portion of the connection nut 4. As a result, the gas tap A
The gas appliance is connected to the gas appliance and the gas plug A is supported by the gas appliance.

The valve body 2 is formed in a tapered shape corresponding to the valve accommodating hole 11 and is accommodated in the valve accommodating hole 11 so as to be rotatable between an open position and a closed position. When the valve accommodating hole 11 is formed in a spherical shape or another shape, the valve body 2 is formed in a shape corresponding thereto. A communication hole 21 is formed inside the valve body 2. The upstream end 2 of the communication hole 21
1a is formed with its axis aligned with the axis of the valve accommodating hole 11 and faces the bottom surface 11a of the valve accommodating hole 11 on the small diameter side of the valve body 2 (in the direction of the rotation axis of the valve body 2). The outer surface) 2a is opened. Therefore, the upstream end 21 a of the communication hole 21 is always in communication with the gas inflow hole 12. The downstream end 21b of the communication hole 21 extends in a direction orthogonal to the axis of the valve accommodating hole 11, and the outer peripheral surface of the valve body 2 (the outer surface facing the direction substantially orthogonal to the rotation axis of the valve body 2) 2b. It is open to. The downstream end 21b communicates with the gas outflow hole 13 when the valve body 2 is rotated to the open position shown in FIG.
As a result, the gas inflow hole 12 and the gas outflow hole 13 communicate with each other through the communication hole 21, and the gas plug A is opened. On the other hand, when the valve body 2 is rotated approximately 90 ° from the open position to the closed position, the downstream end 21b of the communication hole 21 is separated from the gas inflow hole 12 in the circumferential direction of the valve body 2 and the communication hole is formed. The valve body 2 blocks the space between the gas discharge hole 21 and the gas outflow hole 13. As a result, the gas plug A is closed. Intermediate part 21c where the upstream end 21a and the downstream end 21b of the communication hole 21 intersect
Has a right angle. In this case, of the inner surface that defines the intermediate portion 21c, the inner portion of the bend is bent at a right angle, but the outer portion is substantially circular in order to minimize the flow resistance to the gas flowing in the communication hole 21. Formed in an arc shape,
It is smoothly connected to the upstream end 21a and the downstream end 21b. The valve body 2 can be opened and closed by the handle 5.

A downstream end 12b of the gas inlet hole 12
Is inclined so as to approach the downstream end 21b of the communication hole 21 when opened from the upstream side toward the downstream side. Moreover, the bottom surface 1 of the valve housing hole 11
Of the open ends of the downstream end 12b in 1a, the side that is close to the downstream end 21b in the axial direction of the downstream end 21b of the communication hole 21 (hereinafter referred to as the downstream end 12b of the gas inflow hole 12 and Regarding the side portions of each open end of the upstream end portion 21a of the communication hole 21, the side closer to the downstream end portion 21b is referred to as the inner side, and the side away from the downstream end portion 21b is referred to as the outer side). The upstream end 21 of the end surface 2a of the valve body 2
The inner side portion of the open end of a and the downstream end portion 21b are located at substantially the same position in the axial direction. On the other hand, on the outer side portion of the downstream side end portion 12b, the length in the axial direction of the downstream side end portion 21b of the opening end of the downstream side end portion 12b is smaller than that of the valve body 2 on the bottom surface 11a of the valve housing hole 11. Since the length of the lower end surface 2a is shorter than the length of the upstream end portion 21a in the same direction, the lower end surface 2a is located inside the outer side portion of the upstream end portion 21a.

In the gas plug A having the above structure, when the valve body 2 is located at the open position, gas flows into the communication hole 21 from the gas inflow hole 12 and flows out to the outflow hole 13 from the communication hole 21.
Here, the gas that has flowed into the upstream end 21a of the communication hole 21 from the downstream end 12b of the gas inflow hole 12 is as the downstream end 12b of the gas inflow hole 12 moves from the upstream side to the downstream side. The downstream end 2 of the communication hole 21 when opened
Since it is inclined so as to approach 1b, the upstream end 2
It flows obliquely in 1a toward the downstream end 21b from the upstream side to the downstream side. Therefore, although the flow direction of the gas flowing into the communication hole 21 is bent at the intermediate portion 21c of the communication hole 21, the bending angle is smaller than the right angle. Therefore, the pressure loss of the gas in the communication hole 21 can be reduced, which can reduce the decrease in the flow rate of the gas. In particular, in this embodiment, the inner side of the open end of the downstream end 12b on the bottom surface 11a of the valve housing hole 11 is the inner side of the upstream end 21a of the communication hole 21, and the downstream side. Edge 2
Since the gas in the gas inflow hole 12 is located at substantially the same position in the axial direction of 1b, the gas in the gas inflow hole 12 has its downstream end 12b.
Smoothly flows into the upstream end 21 a of the communication hole 21. Therefore, it is possible to further reduce the decrease in gas flow rate.

Next, another embodiment of the present invention will be described. In the following embodiments, only parts different from the above embodiments will be described, the same parts are denoted by the same reference numerals, and the description thereof will be omitted.

FIG. 2 is a diagram showing a second embodiment of the present invention. In the gas plug B of this embodiment, the axis of the valve housing hole 11 is displaced with respect to the axis of the gas inflow hole 12 so as to approach the downstream end 21b when opened. Further, contrary to the above-described embodiment, the outer side portion of the opening end of the downstream end portion 12b in the bottom surface 11a of the valve housing hole 11 is the upstream end portion 21 in the end surface 2a of the valve body 2.
The outer side of the open end of a and the downstream end 21b are located at substantially the same position in the axial direction, and the inner side of the downstream end 12b is the inner side of the upstream end 21a. It is located outside.

In this gas plug B, the outer side portion and the upstream end portion 21 of the downstream end portion 12b through which a larger amount of gas flows.
Since the outer side portion of a is located at the same position in the axial direction of the downstream end portion 21b, the gas inflow hole 12
The gas inside flows into the communication hole 21 more smoothly. Moreover, in the gas plug A of the above-described embodiment, the downstream end portion 1
The gas flowing into the upstream end portion 21a of the communication hole 21 from the inner side portion of 2b is bent at a substantially right angle by the inner surface of the inner side portion of the inner surfaces that partition the upstream end portion 21a. According to the gas plug B of this embodiment, from the inner side of the downstream end 12b to the upstream end 2 of the communication hole 21.
The gas flowing into 1a can be bent only at an angle smaller than a right angle. Therefore, it is possible to further reduce the decrease in gas flow rate.

FIG. 3 shows a third embodiment of the present invention. The gas stopper C of this embodiment is the gas stopper A shown in FIG.
The upstream end 21a of the communication hole 21.
Is inclined in the same direction as the inclination direction of the downstream end 12b of the gas inflow hole 12 when opened. Upstream end 2
Although the inclination angle of 1a is larger than the inclination angle of the downstream end portion 12b, it may be inclined by the same angle as the downstream end portion 12b, or may be inclined at an angle smaller than the downstream end portion 12b. Good. Other configurations are the same as those of the gas plug A shown in FIG.

In this gas plug C, the upstream end 21a of the communication hole 21 is inclined in the same direction as the downstream end 12b, so that the communication hole 21 extends from the downstream end 12b of the gas inflow hole 12. The gas flows more smoothly into the upstream end 21a, and at the same time, the gas flows smoothly in the communication hole 21 from the upstream end 21a to the downstream end 21b. Therefore, it is possible to further reduce the decrease in the gas flow rate.

FIG. 4 shows a fourth embodiment of the present invention. The gas plug D of this embodiment is a modification of the gas plug C described above, and the inside and outside both sides of the opening end of the downstream end 12b of the bottom surface 11a of the valve housing hole 11 are connected to the valve body 2 of the valve body 2. The end face 2a is arranged so as to be located at substantially the same position in the axial direction of the downstream end portion 21b when opened with respect to both inner and outer sides of the opening end edge of the upstream end portion 21a. Other configurations are similar to those of the gas plug C shown in FIG.

In the gas plug D of this embodiment, the inner and outer side portions of the downstream end portion 12b are arranged at substantially the same positions as the inner and outer side portions of the upstream end portion 21a. The gas can more smoothly flow from 12b to the upstream end 21a. Thereby, it is possible to further prevent the flow rate of the gas from decreasing.

[0018]

As described above, according to the present invention, it is possible to reduce the flow rate reduction in the L-type gas plug.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a fourth embodiment of the present invention.

[Explanation of symbols]

A L-type gas stopper B L-type gas stopper C L-type gas stopper D L-type gas stopper 1 Stopper body 2 Valve body 2a End face of valve body (outer surface facing the direction of rotation axis of valve body) 2b Outer peripheral surface of valve body ( Outer surface facing the direction orthogonal to the rotation axis of the valve body 11 Valve housing hole 11a Bottom surface of the valve housing hole (Inner surface of valve housing hole facing the rotation axis direction of the valve body) 11b Inner peripheral surface of the valve housing hole (valve (Inner surface of valve accommodating hole facing in a direction orthogonal to the axis of rotation of the body) 12 gas inflow hole 12b downstream end 13 of gas inflow hole 13 gas outflow hole 13a upstream end 21 of gas outflow hole 21 communication hole 21a communication hole Upstream end portion 21b Downstream end portion 21c of communication hole Intermediate portion of communication hole

Claims (4)

[Claims] 1. A stopper body having a valve accommodating hole formed therein,
A valve body rotatably accommodated between an open position and a closed position is provided in a valve accommodating hole of the stopper main body, and the downstream end of the stopper main body extends in the rotational axis direction of the valve body. A gas inflow hole that opens to the inner surface of the valve housing hole that faces toward it, and a gas outflow hole that opens to the inner surface of the valve housing hole that faces the direction of the upstream end substantially orthogonal to the rotation axis of the valve body , The valve body has an upstream end opening to an outer surface that faces the rotation axis direction of the valve body,
A communication hole is formed, the downstream end of which is open to the outer surface in a direction substantially orthogonal to the rotation axis of the valve body, and the upstream end of this communication hole is always in communication with the gas inflow hole. A downstream end of the valve body communicates with the gas outflow hole when the valve body is located at the open position, and when the valve body is located at the closed position, the downstream end portion of the valve body extends in the circumferential direction of the valve body from the gas outflow hole. In the L-shaped gas plug that is blocked from the gas outflow hole by moving away from the end of the gas inflow hole, the downstream end of the gas inflow hole is communicated when opening from the upstream side to the downstream side of the gas inflow hole. An L-shaped gas plug characterized by being inclined so as to be directed toward a downstream end side of the hole. 2. At least one of one side and the other side in the axial direction of the downstream end of the communication hole among the opening ends on the inner surface of the valve housing hole at the downstream end of the gas inflow hole. The L-shaped gas plug according to claim 1, wherein the upstream end of the communication hole is substantially aligned with one side of the opening end in the same direction. 3. The opening end of the downstream end of the gas inlet hole on the inner surface of the valve accommodating hole, the side away from the downstream end of the communication hole is opened at the upstream end of the communication hole. 3. The L-shaped gas plug according to claim 2, wherein the L-shaped gas plug is made to substantially coincide with a side portion of the end that is away from the downstream end portion of the communication hole. 4. The upstream end of the communication hole is inclined such that the inclination direction when opened is the same as the inclination direction of the downstream end of the gas inflow hole. Item 4. The L-type gas stopper according to any one of Items 1 to 3.