JPH09144907A - Ball valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a ball valve equipped on the pipeline system and the like of the refrigerant of an air system, and reduce the assembly manhour. SOLUTION: The valve main body 100 of a ball valve has an opening arranged on a common axial line, and pipes 40, 42 are attached to the valve main body 100. A ball valve element 20 is rotatively arranged in the valve chamber 112 of the valve main body 100 by being sandwiched between seal members 41, 43. The end 154 of a stem 150 inserted in the stepped hole of the valve main body 100 from the outside, is fitted to the lateral groove 24 of the valve element 20, and the stem 150 is rotated at 90 degrees by a tool such as a driver so that the valve is opened/closed. A detent member 160 arranged on the upper part of the stem 150 is fixed by forming a caulking part 118 to the valve main body 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve installed in a piping system of an air conditioner.

[0002]

2. Description of the Related Art A ball valve is installed in the middle of a refrigerant pipe of an air conditioner, and the pipe is closed during delivery of the air conditioner, and after the air conditioner is installed, the pipe is opened to pass the refrigerant. And has only two positions, a closed position and an open position.

FIG. 5 is a cross-sectional view showing the upper half of the center line of the pipe of this type of ball valve. A valve chamber 12 is formed in the valve body 10, and one pipe 40 is fixedly attached thereto.
The ball-shaped valve body 20 has a through hole 22 and is rotatably held in the valve chamber 12 via seal members 41 and 43. The seal member 43 is supported by the nut 30, and the other seal member 41 is brought into contact with the opening of the valve body 10. A nut 32 is arranged on the outer side of the nut 30, and the other pipe 42 is attached. A groove is formed on the top of the valve body 20, and the driver-like flat plate 5 that engages with the groove 24.
The stem 50 having 4 is inserted from the valve chamber 12 side of the valve body 10.

The stem 50 is a flange portion 5 for preventing slipping out.
6 and is inserted into the opening of the valve body via the packing 55. A seal ring 52 is fitted around the outer periphery of the stem 50 to seal the gap with the opening of the valve body. Stem 50
The upper end portion of is flatly cut out, and a pin 58 is planted in this flat portion. A stopper 16 is formed on the upper portion of the valve body 10. By rotating the pin 58 of the stem 50 by 90 degrees to a position where it abuts on the stopper 16,
The valve body 20 is positioned in the open position and the closed position. Stem 5
Cap 70 that holds the 0 position and prevents foreign matter from entering
Is screwed onto the upper portion of the valve body 10.

[0005]

In the conventional ball valve described above, the stem 50 has the valve chamber 1 of the valve body 10.
It was necessary to insert from the 2 side and assemble. Therefore, in addition to the nut 30 for fixing the seal member 43 of the valve body 20, the nut 32 for attaching the pipe 43 to the valve body 10 must be provided to secure a space for inserting the stem 50. For this reason, the valve body becomes large,
There was a problem that the number of parts increased. The present invention provides a ball valve which eliminates the above-mentioned conventional problems.

[0006]

The ball valve of the present invention is a stem for operating a ball-shaped valve element, which is inserted from the outside of the valve body into a stepped hole formed in the valve body at right angles to the flow path. The stem detent member disposed outside the stem is configured to be fixed by a caulking portion formed on the valve body.

[0007]

1 is a cross-sectional view of a ball valve showing an embodiment of the present invention. The valve body 100 has a valve chamber 112, and the first pipe 40 is attached to an opening of the valve body 100 communicating with the valve chamber 112. In the valve chamber 112, the ball-shaped valve body 20 is provided with a seal member 41,
It is arranged in a state of being held by 43, and the nut member 130 is screwed into the threaded portion 114 of the valve body 100, whereby the valve body 2
0 is held in the valve chamber 112. The second pipe 42 is fixed to the nut member 130.

The valve body 20 is provided with a through hole 22,
The flow path between the first pipe 40 and the second pipe 42 can be opened and closed by rotating the ball-shaped valve body 20 by 90 degrees. A lateral groove 24 is provided in the upper portion of the valve body 20, and a driver-like tip portion 154 formed at the tip of the stem 150 is fitted therein. A gas vent hole 255 is provided between the lateral groove 24 and the through hole 22. The stem 150 is configured to be inserted into a stepped hole formed in the upper portion of the valve body 100, and is inserted into the stepped hole of the valve body via a seal member 152 such as an O-ring. At the top of the stem 150, there is a lateral groove 155 into which a minus driver is fitted,
A detent member 160 is disposed on the top of the stem 150.

In the detent member 160, when the stem 150 is rotated 90 degrees by a tool such as a screwdriver to open and close the valve, the lateral groove 155 guides the tool such as the screwdriver to open or close the stem. It serves as a guide groove for holding. The detent member 160 is attached to the upper surface of the valve body 110 by a pin 164 in a predetermined posture,
A swaged portion 118 that inclines toward the inside is formed at the upper end of 0, and the detent portion 160 is fixed. With this configuration,
The stem 150 is also rotatably held in the valve body 110.

A cap 170 is screwed into a threaded portion 116 formed on the outer peripheral portion of the valve body to prevent malfunction of the stem 150 and entry of foreign matter. As described above, according to the present invention, since the ball valve can be assembled by inserting the stem from the upper portion of the valve body in which the ball-shaped valve body is incorporated, the productivity is improved and the number of parts can be reduced.

FIG. 2 is a sectional view of a ball valve showing another embodiment of the present invention. The valve body 1 of this ball valve
00 is a state in which the first pipe 40 and the second pipe 42 are attached, and the inside of the valve chamber 112 and the ball-shaped valve body 20 are sealed by the sealing members 41 and 43 on both sides, as in the above-described embodiment. It is arranged in. 2, the same reference numerals as those in FIG. 1 indicate the same or equivalent portions. The tip portion 254 of the stem 250 inserted into the stepped hole formed in the upper portion of the valve body 100 has a driver-like shape and fits in the groove 24 formed in the upper portion of the valve body 20. A hole 255 for degassing is provided between the groove 24 and the through hole 22. Stem 25
0 is inserted into the stepped hole of the valve body via the seal member 252, and the stem 250 and the valve body 100 are sealed. The stem 250 has a parallel surface 2 formed on a shaft portion having a small diameter.
56, and the stem 250 is rotated by sandwiching this parallel surface with a tool such as a spanner. An anti-rotation member 160 is placed on the upper surface of the large diameter portion of the stem 250, and is fixed by forming a caulking portion 118 that falls inward on the valve body 100.

FIG. 3 is a plan view and a sectional view of the detent member 160. The detent member 160 is fixed to the upper portion of the valve body 100 by a pin 164 in a predetermined posture. The stem 250 of the stem 250 has a hole
It projects from 62. The hole 162 has a shape that stops when the stem 250 is rotated 90 degrees.

FIG. 4 is a plan view and a sectional view of the stopper 300 fitted on the upper portion of the detent member 160. The stopper 300 is made of, for example, a plastic such as nylon, and has a central opening 310 and a protrusion 320. Open the opening 310 of the stopper 300 to the stem 25
No. 0 parallel surface 256 is fitted and fitted, and the protrusion 320 is inserted between the opening 162 of the detent member 160 and the parallel surface 256. By fitting the stopper 300, the stem 250 is prevented from moving.

The cap 170 is attached to the thread portion 1 of the valve body 100.
16 is screwed to prevent malfunction of the stem 250 and intrusion of foreign matter. A protrusion 172 is formed inside the cap 170, and prevents the stopper 300 from rising.

[0015]

INDUSTRIAL APPLICABILITY As described above, the present invention is a ball valve which is installed in a piping system of an air conditioner and has two positions, an open position and a closed position. The stem is inserted from the outside, and the tip of the stem engages with the groove of the valve body. A stem stopper is attached to the outside of the stem, and the stem is held on the valve body by crimping the valve body. With this configuration, the number of parts constituting the ball valve is reduced and the assembly is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a ball valve according to an embodiment of the present invention.

FIG. 2 is a sectional view of a ball valve according to another embodiment of the present invention.

FIG. 3 is a plan view and a sectional view of a detent member.

FIG. 4 is a plan view and a sectional view of a stopper.

FIG. 5 is an explanatory view showing a conventional ball valve.

[Explanation of symbols]

 20 valve body 22 through hole 40,42 pipe 41,43 seal member 100 valve body 112 valve chamber 150 stem 160 whirl stop member 170 cap 300 stopper

Claims (3)

[Claims] 1. A valve body having an inlet passage and an outlet passage arranged on a common axis, a valve chamber, a ball-shaped valve body rotatably held in the valve chamber, and a valve body. Is a ball valve that has a stem for rotating the stem, and the flow passage is opened and closed by rotating the stem by 90 degrees. A ball valve having a structure that is inserted from the outside of the valve body, and a detent member for the stem arranged outside the stem is fixed by a caulking portion formed on the valve body. 2. The ball valve according to claim 1, wherein the stem is provided with a groove on the side opposite to the side connected to the valve body, with which a tool such as a driver is engaged. 3. The ball valve according to claim 1, wherein the stem has a parallel surface with which a tool such as a spanner is engaged, at a portion opposite to the side connected to the valve body.