JPH0717896Y2 - Header branch cock shutoff valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cock shutoff which is connected to a pipe for branching and supplying gas to a home or the like and has a shutoff function for an overflow gas and a normal gas shutoff function. It is about valves.

[Conventional technology]

Conventionally, a multi-plug branch header as shown in FIG. 3 has been used for branching and supplying city gas to various gas appliances in the home.
32 is used.

In the figure, 33 is the outer wall of the building, 34 is the cock shutoff valve, 35 is the inner wall,
36 is domestic piping.

The cock shut-off valve 34, as shown in the longitudinal sectional view of FIG. 4, has a ball valve element 37 for performing an overflow gas shut-off function and a normal gas shut-off function. That is, the configuration is such that the gas stop valve seat 39 is provided in the primary side flow path 38, and the tip end of the separation / connection pin 41 faces the opening 40 of the valve seat 39. Ball valve element 37 by compression spring 42
It is biased in the direction (upward) and is displaceable downward. Further, an overflow shutoff valve seat 43 is provided on the upper side facing the valve seat 39. Further, the solenoid 44 is provided above the valve seat 43, and the plunger 45 is biased by the compression spring 46 so that the ball valve element 37 in a state of being in close contact with the valve seat 43 can be pressed.

In the figure, 47 is a secondary side flow path, 48 is an electric wire, and 49 is a manual cock.

Further, during normal use, the ball valve element 37 has the connecting / disconnecting pin 41.
There is a gap between the valve seat 39 and the upper part, and gas flows from the gap to the secondary side 47. To stop the gas, use a remote switch (not shown) connected to the electric wire 48 to project the plunger 45 and
To the valve seat 39. At this time, the contact / separation pin 41 is displaced downward. Should you remove the domestic pipe (hose) by hooking it with your foot, etc.
Rises and closes the valve seat 43, so that the outflow of gas is blocked.

However, the cock shutoff valve 34 described above has some drawbacks. That is, since the overflow gas pressure is set by utilizing the own weight of the ball valve element 37 to cause a blocking (fuse) action, it cannot be used in the reverse orientation or in the horizontal orientation. Therefore, the third
As shown in the figure, the cock shutoff valve 34 becomes long in the vertical direction, and a large installation space is required. In addition, because the structure in which the solenoid valve 44 pushes down the ball valve element 37 from the secondary side 47, if the gas pressure in the primary side flow passage 38 is high, the pressing force of the compression spring 46 on the solenoid 44 side must be increased to increase the ball valve. Body 37
Since the airtightness between the valve seat 39 and the valve seat 39 cannot be secured, there is concern about the reliability of the airtightness, and the solenoid 44 itself must be made large in order to pull up the plunger 45 against the compression spring 46 with a high load. Becomes bloated.

[Problems to be solved by the device]

In view of the above-mentioned drawbacks, the present invention is advantageous in terms of space because the mounting direction is not restricted, and moreover, the valve closing operation can be performed with a constant force without being affected by the magnitude of the pressure on the primary side, and is sufficient. It is an object of the present invention to provide a cock shutoff valve capable of maintaining excellent airtightness.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a ball valve body that abuts from a gas inflow side with respect to a first valve seat provided in a primary side flow path, and the ball valve body in the gas inflow direction. Spring means for biasing in the opposite direction, a second valve seat provided at the inlet of the secondary side flow passage, and a solenoid with a mover facing between the primary side flow passage and the secondary side flow passage , A ball valve opening lever having a pressing portion for the ball valve element formed at one end, a middle portion pivotally supported for rotation, and the other end pivotally supported for the mover, and the second valve at one end. A valve body opening / closing lever in which a valve body for the seat is provided, a middle portion of which is pivotally supported, and the other end of which is pivotally supported by the mover; and the ball valve body opening lever is the ball valve body. It is basically configured such that the valve body opening / closing lever brings the valve body into close contact with the second valve seat at the same time when is pressed.

[Action]

Since the shut-off pressure is set by urging the ball valve body by the spring means, the shut-off action is performed regardless of the direction in which the cock shut-off valve is attached.

Further, since the valve element is located on the primary side with respect to the valve seat provided at the inlet of the secondary side flow path, and the ball valve element opens simultaneously with the closing of the valve element, the valve element is the primary side. It is pressed against the valve seat by the pressure of. Therefore, airtightness is improved.

〔Example〕

FIG. 1 is a longitudinal sectional view showing a header branch cock shutoff valve A of the present invention, (a) showing a closed state and (b) showing an open state.

In the figure, gas flows in the direction of the arrow, 1 is a primary side flow path, and 2 is a secondary side flow path. Then, a ball valve element 3 having a shutoff function is provided for the primary side flow path 1. The ball valve body 3
Has one end fixed to the bottom 5 of the stop member 4 and the other end coupled to the ball valve body 3 and is urged by the tension spring 6 in the direction opposite to the gas inflow direction. The force of the tension spring 6 is set by the gas cutoff pressure.

At the outlet of the primary flow path 1, a valve seat 7 for the ball valve body 3 is provided.
Is provided. The valve seat 7 is made of synthetic rubber,
It is fixed to the joint body 10 by a retaining ring 8 and a washer 9.

A valve seat 11 is provided at the inlet of the secondary side flow path 2 as a gas stopping valve mechanism in a normal time, and the valve seat 11 is provided with a valve body 12 described later.
It is opened and closed by.

A solenoid 14 is provided above the valve chamber 13 provided between the primary flow passage 1 and the secondary flow passage 2, and a shaft 16 is coupled to the tip of a plunger 15 of the solenoid 14 to form a mover 17. ,
The mover 17 faces the inside of the valve chamber 13. The mover 17 is
A compression spring 20 whose one end is in contact with a fixing bracket 19 of the solenoid body 18 is urged so as to project toward the valve chamber 13 side. At the tip of the shaft 16, the ball valve 3 is provided at one end.
A ball valve opening lever 23 having a pressing portion 21 for the valve seat, and an intermediate portion 22 rotatably supported by a bracket 19, and a valve body 12 for the valve seat 11 provided at one end by pin connection. The other ends of the valve body opening / closing levers 25, which are pivotally supported by the brackets 19, are also pivotally supported, respectively. The surface of the ball valve body pressing portion 21 is coated with a resin to prevent abrasion due to contact between metals.

Here, if the excitation of the solenoid 14 is released, the valve closed state as shown in FIG. That is, the mover 17 projects toward the valve chamber 13 (downward) by the force of the compression spring 20 and rotates both levers 23 and 25 outward, so that the valve body 12 closes the valve seat 11 and at the same time the ball valve is closed. The body pressing portion 21 is the opening of the valve seat 7.
Located at 26, the ball valve body 3 is prevented from being shut off, and a gap is created between the ball valve body 3 and the opening 26. The gas on the primary side passes through this gap and presses the back surface of the valve body 12, so that the valve body 12 firmly adheres to the valve seat 11.

Further, when the solenoid 14 is excited, the valve is opened as shown in FIG. That is, the plunger 15 is pulled toward the solenoid 14 side against the force of the compression spring 20, and the levers 23, 2
Since the valves 5 are respectively rotated inward, the valve body 12 is separated from the valve seat 11, and the ball valve body pressing portion 22 is the opening portion of the valve seat 7.
Get out of 26. Therefore, the gas can flow to the secondary side 2. Here, when the overflow gas tries to flow, the ball valve element 3 receives the pressure, moves against the force of the tension spring 6, and closes the valve seat 7.

When the gas is to be used again from this state, once the solenoid 14 is deenergized and the valve is closed as shown in FIG. 3A, the ball valve element 3 is pressed by the ball valve element opening lever 23. Upon return, the gas can flow again.

Now, the primary side joint portion 10 having the ball valve body 3
Is connected and fixed to a shut-off valve main body 27 having a solenoid 14, both levers 23 and 25, and a valve seat 11 via a seal member 28 by a spring pin 29 and a machine screw 30. The shutoff valve main body 27 can be easily attached and detached. Therefore, for example, when the shutoff function is not required, the ball valve body 3 may be separated and removed.
Even if one of the shut-off function and the valve-closing function fails during use, it is sufficient to replace one of them, so the workability of attachment and detachment is good and there is no waste of parts.

FIG. 2 is a front view showing a state in which the cock shutoff valve A shown in FIG. Here, since the ball valve element 3 is coupled by the tension spring 6 and does not move arbitrarily, the mounting direction of the cock shutoff valve A is not limited to the horizontal direction and may be the vertical direction.

[Effect of device]

As described above, the cock shutoff valve according to the present invention has a small mounting space because the mounting direction is not restricted.
Most suitable for urban houses.

Furthermore, since the valve is closed using the primary pressure, it has better airtightness than before and at the same time consumes less energy for the solenoid when it is closed, so it is possible to use a small solenoid with a small output. Therefore, the structure is compact and the economy is improved. Further, since the valve is closed by using the primary side pressure, even if the primary side set pressure is large, a small solenoid with a small output can be used, the solenoid need not be changed, and the cost can be reduced by sharing the solenoid.

On the other hand, since the joint portion and the shutoff valve body can be detached, the header can be easily attached and maintained, and the working time can be shortened.

[Brief description of drawings]

FIG. 1 (a) is a vertical sectional view showing a header branch cock shutoff valve (closed state) of the present invention, FIG. 1 (b) is a vertical sectional view showing the same valve opened state, and FIG. 2 is the present invention. A front view showing a state where a header branch cock shutoff valve is attached to a header, Fig. 3 is a perspective view showing a mounting state of a conventional header branch cock shutoff valve, and Fig. 4 is a longitudinal section showing a conventional header branch cock shutoff valve It is a figure. 1 ... Primary side flow passage, 2 ... Secondary side flow passage, 3 ... Ball valve element, 6 ... Tensile spring, 7,11 ... Valve seat, 10 ... Joint part, 12 ... Valve element, 14 ... Solenoid, 17 ... Mover, 20
...... Compression spring, 21 ...... Ball valve body pressing part, 22,24 ...... Intermediate part, 23 ...... Ball valve body opening lever, 25 ...... Valve opening and closing lever, 27 ...... Shutting valve body, 29 ...... Pin, 30 ... small screw,
31 …… Header.

Claims (2)

[Scope of utility model registration request] 1. A first valve seat provided in a primary side flow path,
A ball valve body abutting from the gas inflow side, spring means for urging the ball valve body in the opposite direction to the gas inflow direction, a second valve seat provided at the inlet of the secondary side flow passage, A solenoid having a mover facing between the primary side flow passage and the secondary side flow passage, a pressing portion against the ball valve body is formed at one end, a middle portion is rotatably supported, and the other end is A ball valve opening lever that is axially supported by the mover, a valve element for the second valve seat is provided at one end, a middle portion is pivotally supported, and the other end is pivotally supported by the mover. And a valve body opening / closing lever which presses the ball valve body, and at the same time, the valve body opening / closing lever brings the valve body into close contact with the second valve seat. Characteristic header branch cock shutoff valve. 2. A header branch cock shutoff valve according to claim 1, wherein a primary side joint portion having a ball valve body is detachably attached to the shutoff valve body.