JPH06174144A - Valve - Google Patents

Abstract

PURPOSE:To provide the structure of a value wherein gas is prevented from its leakage even when the valve is rotated by applying any external force to act on a handle at the time of not using a valve. CONSTITUTION:A spindle 3, formed with a valve unit 4 on its point end, is screwed to a valve main unit 1 having a valve seat 2. A stopper member 5 is secured to the rear end of the spindle 3, and also a handle 7, rotatable and movable in an axial direction and further provided with an engaging part 6 engaged with the stopper member 5 is mounted on the spindle 3. The handle 7 is energized in the direction of the stopper member 5 by a spring 8. A valve is closed to move the handle 7 in an axial direction of the spindle 3, and by disengaging the stopper member 5 from the engaging part 6 so as to recover the handle 7, the handle 7 and the spindle 3 are held in a condition separated from each other. Under this condition, even when external force acts on the handle 7 so as to rotate the handle 7, the spindle 3 is prevented from rotating, and gas can be prevented from its leakage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve constructed so that the handle and the spindle can be disengaged after the valve seat is closed.

[0002]

2. Description of the Related Art At a construction site of steel structures such as buildings and bridges, or at a construction site such as an ironworks, a manual gas cutting method using oxygen gas and acetylene gas when cutting shaped steel sheets or steel sheets or welding thin steel sheets. Uses a hand torch such as a gas vessel or a manual gas welder. These hand torches are provided with valves for circulating or blocking oxygen gas and acetylene gas and for adjusting the flow rates of these gases. Many valves are also used to supply various gases to hand torches or other gas appliances.

The valve is constructed by providing a valve seat on the valve body and screwing a spindle having a valve body at the tip to the valve body. Then, by rotating the handle fixed to the spindle and sliding the spindle in the axial direction, the gap between the valve seat and the valve body is appropriately set to allow the gas flow,
It is for shutting off or adjusting the flow rate.

[0004]

In the valve used in the above-mentioned hand torch, etc., when the valve seat and the valve body are brought into close contact with each other and closed when not in use, when some external force acts on the handle, the handle rotates. Gas may leak.
In such a case, there is a problem that a fire or an explosion may occur depending on the leaked gas.

An object of the present invention is to provide a valve capable of maintaining a closed state even when the handle is rotated by an external force when the valve is closed.

[0006]

In order to solve the above problems, a valve according to the present invention comprises a valve body having a valve seat and a valve body which is screwed into the valve body and which opens and closes the valve seat at the tip. A spindle, an engaging portion provided at a rear end of the spindle, and an engaging portion that is rotatably and axially slidably attached to an axis of the spindle and engages with the engaging portion A handle and an urging member for urging the handle in a direction parallel to the spindle axis, and when the valve seat is opened and closed, the handle is slid in a direction parallel to the spindle axis. The engaging portion of the handle and the engaging portion of the spindle are engaged with each other so that the engaging portion of the handle and the engaging portion of the spindle can be disengaged when the valve seat is closed.

[0007]

According to the above valve, since the spindle having the valve body for opening and closing the valve seat at the tip is screwed into the valve body, the gap between the valve body and the valve seat is adjusted by rotating the spindle. The flow rate of the fluid can be adjusted, and the fluid can be circulated and blocked.

Further, a handle provided with an engaging portion is mounted rotatably and slidably in an axial direction with respect to a shaft center of a spindle provided with a locking portion at a rear end thereof, and the handle is provided with an urging member to provide the shaft center. Since it is configured to urge in a direction parallel to, by sliding the handle against the urging force of the urging member,
The handle and the spindle can be engaged or released from each other. Therefore, when the engagement between the handle and the spindle is released with the valve closed, only the handle does not rotate and the valve does not open even if an unexpected external force acts on the handle.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the valve according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the valve, illustrating a state where the handle and the spindle are engaged, and FIG.
Is a plan view for explaining the relationship between the handle and the spindle, FIG.
FIG. 6 is a diagram illustrating a state in which the engagement between the handle and the spindle is released.

In the figure, a valve A includes a valve body 1 having a valve seat 2 formed thereon, a spindle 3 having a valve body 4 formed at its tip,
Locking member 5 serving as a locking portion provided at the rear end of the spindle 3.
And a handle 7 provided with an engaging portion 6 which is rotatably and axially slidably mounted on the spindle 3 and engages with the locking member 5, and the handle 7 in a direction parallel to the axis of the spindle 3. And a biasing member 8 for biasing.

A valve seat 2 is formed at a predetermined position of the valve body 1, and a hole 9a connected to a pressure regulator, which is a gas supply side, and a gas appliance side, for example, a gas, are provided in the valve seat 2. The hole 9b connected to the cutting crater is communicated. Further, inside the valve body 1, a screw portion 1a for screwing the spindle 3 is provided.
Are formed.

A tapered valve body 4 is provided at the tip of the spindle 3.
Is formed, and a screw portion 3a screwed into the screw 1a of the valve body 1 is formed at a predetermined position separated from the valve body 4. A chamfer 3b and a screw 3c are provided at the rear end of the spindle 3.
Are continuously formed. The locking member 5 is non-rotatably attached to the chamfered portion 3b.
Is fixed to the spindle 3 by a nut 10 screwed into the screw portion 3c.

As shown in FIG. 2, the locking member 5 is constructed by projecting locking pieces 5b at opposite positions of a disk-shaped main body 5a.

The handle 7 is mounted on the spindle 3 so as to be rotatable and axially slidable. For this reason, the bearing portion 7a fitted to the spindle 3 is provided on the tip end side of the handle 7.
Are formed. Further, a housing portion 7b having a size capable of housing the locking member 5 is formed on the rear end side of the handle 7, and a cutting member having a shape similar to the locking member 5 is formed at the rear end of the housing portion 7b. An end surface member 7c having a notch is provided, and a locking portion 6 that engages with the locking piece 5b of the locking member 5 is formed on the end surface member 7c.

A spring 8 serving as a biasing member is disposed between the locking member 5 and the handle 7, and the spring 8 applies an end surface member 7c formed on the handle 7 in a direction of pressing the locking member 5 against the end surface member 7c. I am energetic.

In the above structure, as shown in FIG. 1, when the locking portion 6 of the handle 7 is fitted to the locking piece 5b of the locking member 5 fixed to the spindle 3, the spindle 3 and the handle 3 It is possible to integrate 7 via the locking member 5. Therefore, when the handle 7 is rotated in this state,
With this rotation, the spindle 3 rotates, and the valve body 4 can be separated from or brought close to the valve seat 2. That is, by rotating the handle 7, it is possible to cause the gas supplied from the hole 9a side to flow to the hole 9b side or to block the flowing gas.

The valve body 4 is brought into close contact with the valve seat 2 to close the valve A, and the handle 7 is slid toward the rear end of the spindle 3 against the biasing force of the spring 8, as shown in FIG. The engagement between the engagement portion 6 and the engagement piece 5b of the engagement member 5 is released with, and the handle 7 is rotated in either the left or right direction to rotate the handle 7
When is returned, the end surface member 7c of the handle 7 is engaged with the locking piece 5b of the locking member 5 in an overlapping state, and the state where the handle 7 and the locking member 5 are disengaged is maintained. In this state, the spindle 3 does not rotate even if the handle 7 is rotated.

Therefore, when the valve A is applied to a hand torch such as a manual gas cutter or a manual gas welder, the valve A is closed and the handle 7 and the spindle 3 are disengaged when not in use. At this time, even if some external force acts on the handle 7, only the handle 7 does not rotate and the spindle 3 does not rotate, and it is possible to prevent gas leakage due to unexpected rotation of the handle 7 when not in use. Becomes

However, in the valve A described above, even if the engagement between the handle 7 and the locking member 5 is released, the handle 7 still has the spindle 3
When rotated up to 180 degrees, the locking part 6 of the handle 7
Is opposed to the locking piece 5b of the locking member 5, and the handle 7 slides in the axial direction of the spindle 3 by the urging force of the spring 8 to reengage them. Therefore, by rotating the handle 7, the spindle 3 is rotated and gas is circulated.

FIG. 4 is a sectional view for explaining the structure of the valve B according to the second embodiment. In the drawings, the same parts as those in the above-described embodiment and parts having the same functions are designated by the same reference numerals and the description thereof will be omitted.

In the figure, the locking member 5 is formed in a disk shape, and a plurality of pins 11 are provided at predetermined positions on the locking member 5. A plurality of pin holes 12 are formed in the handle 7 at positions facing the pins 11. The handle 7 is biased by a spring 8 in a direction in which the pin hole 12 engages with the pin 11 of the locking member 5. The number of pins 11 and pin holes 12 is not particularly limited, and one or more desired numbers can be provided.

In the valve B constructed as described above, the fitting of the pin hole 12 and the pin 11 is released by sliding the handle 7 to the tip side of the spindle 3 against the biasing force of the spring 8. When the handle 7 is rotated and returned in this state, the state in which the engagement between the handle 7 and the locking member 5 is released is maintained. Therefore, even if the handle 7 is rotated in this state, the spindle 3 does not rotate.

When the valve B constructed as described above is applied to a hand torch, the spindle 3 is not rotated even if an unexpected external force is applied to the handle 7 of the hand torch that is left unused, and gas leakage occurs. Can be prevented.

FIG. 5 is a sectional view for explaining the structure of the valve C according to the third embodiment. In the drawings, the same parts and parts having the same functions as those in the above-mentioned respective embodiments are designated by the same reference numerals and the description thereof will be omitted.

In the figure, the spindle of the valve C is formed by dividing the spindle 3 in each of the above-mentioned embodiments into two parts with the rear end of the screw part 3a as a boundary, and the valve body 4 at the tip. And a second spindle 14 having a handle 7 fixed to the rear end thereof.

The first spindle 13 is formed with a screw portion 13a to be screwed with the screw portion 1a formed on the valve body 1, and a locking groove 13b serving as a locking portion is formed at the rear end thereof.

The second spindle 14 is mounted rotatably and axially slidably on a cap nut 15 screwed onto the valve body 1. An engaging protrusion 14a serving as an engaging portion that engages with a locking groove 13b formed in the first spindle 13 is provided at the tip of the second spindle 14, and the chamfered portion 14 is provided at the rear end side.
b and a screw portion 14c are formed. The handle 7 is non-rotatably mounted on the chamfered portion 14b, and the handle 7 is fixed to the second spindle 14 by a nut 10.

The spring 8 is arranged between the cap nut 14 and the handle 7. Therefore, the handle 7 has the spring 8
The engaging protrusion 14a of the second spindle 14 is always urged by the urging force in the direction away from the engaging groove 13b of the first spindle 13.

In the valve C constructed as described above, the first spindle 13 and the second spindle 14 are not normally engaged. Further, the handle 7 is slid toward the tip side against the biasing force of the spring 8 and moved toward the first spindle 13 to move the engaging protrusion 14a of the second spindle 14 into the first spindle.
It is possible to engage with the locking groove 13b of 13. The engagement between the engaging protrusion 14a and the engaging groove 13b is maintained and the handle 7 is held.
By rotating, the valve body 4 can be brought into contact with and separated from the valve seat 2, and the gas can be circulated.

When the valve C constructed as described above is applied to a hand torch, the first spindle 13 does not rotate even if an unexpected external force acts on the handle 7 of the manual gas cutter which is left unused. It is possible to prevent gas leakage.

[0031]

As described above in detail, in the valve according to the present invention, since the handle and the spindle can be separated from each other, an external force acts on the handle of the valve which is left unused when it is rotated. However, the spindle does not rotate. Therefore, it has a feature that unexpected gas leakage can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a valve illustrating a state in which a handle and a locking member are engaged with each other.

FIG. 2 is a plan view illustrating a relationship between a handle and a locking member.

FIG. 3 is a diagram illustrating a state in which the engagement between the handle and the locking member is released.

FIG. 4 is a diagram illustrating a valve according to a second embodiment.

FIG. 5 is a diagram illustrating a valve according to a third embodiment.

[Explanation of symbols]

 A, B, C Valve 1 Valve body 1a Screw part 2 Valve seat 3 Spindle 3a Screw part 4 Valve body 5 Locking member 5b Locking piece 6 Locking part 7 Handle 7b Storage part 7c End face member 8 Energizing member, Spring 10 Nut 11 Pin 12 Pin hole 13 First spindle 13b Lock groove 14 Second spindle 14a Engagement protrusion

Claims (1)

[Claims] 1. A valve main body having a valve seat, a spindle having a valve body screwed into the valve main body to open and close the valve seat at a tip thereof, a locking portion provided at a rear end of the spindle, and A handle provided with an engaging portion that is rotatably and axially slidably attached to the spindle axis and engages with the locking portion; and the handle is attached in a direction parallel to the spindle axis. When the valve seat is opened and closed, the handle is slid in a direction parallel to the axis of the spindle to engage the engaging portion of the handle with the engaging portion of the spindle.
A valve characterized in that the engagement of the handle and the engagement of the spindle can be released when the valve seat is closed.