JPS6160311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit breaker suitable for application to, for example, a controller capable of remotely shutting off a gas main valve or operating a valve of a fluid plant using a remote signal.

Conventionally, for example, gas pipes have been branched off from the main valve in the home and then connected to the hand stopper of each combustion appliance, but in some cases, it has become almost impossible to operate the hand stopper due to an accident during combustion, etc. There is. However, since the main valve is generally installed outdoors or in a location away from the appliance installation location, it is extremely difficult to shut off the main valve instantly.

In view of this, the present invention operates a solenoid using an electric signal, uses the operation as a trigger, and uses a spring force to instantly shut off a heavily loaded main valve, etc., and prevents the initial setting position from shifting due to the impact when the solenoid is shut off. The main purpose of this invention is to propose a circuit breaker which is provided with a fixing means to obtain the desired results.

An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 are a central vertical sectional view and a sectional view taken along the line in FIG. 1, respectively, showing an example of the present invention. 21
indicates the case of the circuit breaker, and a rotary shaft 22 with an arm that penetrates the center of the case 21 and engages with the lever 20a of the main cock 20 is supported by a bearing part 24' provided in the case 21 and the lid 23. . A tension coil spring 24 is in contact with the peripheral surface of the shaft 22, and a pulley 25 that rotates the shaft 22 by the force of the spring is fixed with a key. The circumferential surface of the pulley 25 is provided with a concave groove 25a that approximately matches the outer diameter of the spring 24 to prevent the two springs 24 from coming off, and a locking pin 26 for fixing one end of the spring 24 is provided on the circumferential surface of the pulley 25. is screwed in. Spring 2
The other end of 4 is a tension adjuster 27 attached to the housing 21.
is locked. The tension adjuster 27 is composed of an L-shaped support 28, an adjustment bolt 29, and a spring locking piece 31 into which the adjustment bolt 29 is threaded. Since the piece 31 moves, the tension of the spring 24 can be adjusted.

Reference numeral 33 indicates a solenoid housed in the housing 21, and the tip of this movable piece 33a is rotatably fitted to the action point side of the arm 35 via a link 34. The arm 35 rotatably supports a roller 36 in contact with the link 34 and the pulley 25, has a pin 35a planted in the center for spring locking, and has a hole for a rotation fulcrum on the opposite side. . The tension spring 38 that is engaged with the pin 35a has one end engaged with a pin body 39 that protrudes from the housing 21, and acts to constantly press the roller 36 of the arm 35 against the circumferential surface of the pulley 25. Incidentally, reference numeral 40 indicates a fulcrum block forming a fulcrum of the arm 35, which is fixed to the housing 21.

The lid 23 side of the rotating body 22 has a rectangular shaft for engaging the manual lever 42. Therefore, by setting the lever 20a in the same direction as the lever 20a of the main valve 20, the operator can open and close the main valve without error. A locking portion 43 is integrally fixed to the shaft 22 between the pulley 25 and the lid 23, and is disposed between stoppers 44a and 44b that project from the lid 23.
In order to maintain the flow state of the main stopper 20 during normal times, a recess 25b is formed in a part of the circumferential surface of the pulley 25, in which the roller 36 of the arm 35 engages, and the roller 36 is always engaged with the recess 25b. (See Figure 2).

Therefore, in normal times, the solenoid 33 does not work, so the movable piece 33a is in an extended state.
The arm 35 is attached to the roller 36 by the tension spring 38.
and the recess 25b of the pulley 25, the arm 22a of the arm-equipped rotary shaft 22 resists the stretching force of the coil spring 24 and pushes the lever 2 of the main valve 20.
It is held in the open position of 0a.

Next, when a pulse signal is supplied to the solenoid 33 by an external signal, the movable piece 33a is
8. As the pull is shortened against other drag forces, the engagement between the pulley 25 and the roller 36 is released, and the return force of the coil spring 24 causes the shaft 22 to rapidly rotate counterclockwise in FIG. do. Therefore, as shown in FIG.
The lever 20a is switched to the closed state. Note that the shaft 22 engages the locking portion 43 and the stopper 44 at a predetermined rotational position.
Since the lever 20a is in contact with the lever 20a, the lever 20a can be set to an accurate closed position.

On the arm 22a side of the casing 21, in order to attach the casing 21 to a separately installed conduit, there are two sets of bases 51 and a U protruding from the base 51, as shown in FIG.
A bracket 53 supporting the bolt 52 is provided,
It is fixed to the front and rear pipes 19 of the main stopper 20 with nuts. Therefore, the casing 21 does not move due to the impact when the main valve 20 is shut off, and therefore the casing 21
Since no deviation occurs, the initial setting of the main valve 20
There is no deviation in the open (normal) position of the valve, and there is no need to correct the deviation.In addition, compared to a circuit breaker that is attached directly to the main valve 20, it is possible to manufacture various types of circuit breakers in advance and attach them to the required main valve, etc. It can be easily installed and installed, and if it is no longer needed, the entire casing can be removed, allowing for an appropriate selection depending on the situation.

Although the above-mentioned example is applied to a domestic combustion gas main valve, it is of course applicable to remote control of valves in other fluid plants.

As described above, according to the present invention, there is a solenoid, a rotating shaft that rotates via a spring due to the operation of the solenoid, a pulley that is integrated with the rotating shaft, and a pulley that is engaged with the circumferential surface of the pulley. The rotating shaft is provided with an arm that engages with the lever of the valve, and the housing housing the solenoid, the rotating shaft, the pulley, and the pulley rotation regulating means is fixed to the piping of the valve. A fixing means is provided, and the fixing means is composed of bracket fixing members provided at both ends of the casing so as to sandwich the arm in order to suppress the rotation of the casing that occurs when the valve is shut off. It has the effect of easily changing from a manual valve to a remotely controllable valve, and furthermore, when the valve is shut off, the casing itself moves with the impact caused by rocking and rotating the entire casing. I often do it, but
In order to prevent this, the valve can be reliably fixed to, for example, front and rear piping or other fixed objects by the bracket fixing members provided at both ends of the casing across the arm, thereby preventing repeated shutoffs. It is no longer necessary to cause a shift in the initial setting position due to the operation and to correct the shift. Further, when using an electric signal, it is necessary to increase the mechanical output by providing special amplification means, etc., but according to the present invention, the mechanical output is obtained by the above-mentioned spring, so a large torque is not required. This has the effect of easily and simply controlling the rotational force of the valve at low cost.

Furthermore, when the upper valve is applied to the gas main valve,
When the hand stopper of a combustion appliance does not operate for some reason, the main stopper can be shut off instantly by activating the solenoid operating switch, thereby preventing the cause of fire such as spread of fire.

[Brief explanation of the drawing]

1 and 2 are a central vertical cross-sectional view and a cross-sectional view taken along the line in FIG. 1, showing an example of the present invention, and FIG. 3 is a diagram for explaining the operation. 21... Housing, 22... Rotating shaft with arm, 2
4...Tension coil spring, 25...Pook, 33
... Solenoid, 35 ... Arm, 38 ... Tension spring, 42 ... Manual lever, 52 ... U bolt, 53 ... Bracket.

Claims (1)

[Scope of Claims] 1. A solenoid, a rotating shaft that rotates via a spring due to the operation of the solenoid, a pulley integrated with the rotating shaft, and a pulley rotation restriction that locks on the circumferential surface of the pulley. the rotating shaft is provided with an arm that engages a lever of the valve, the solenoid is
The housing housing the rotating shaft, the pulley, and the pulley rotation regulating means is provided with fixing means for fixing to the pipe of the valve, and the fixing means is configured to prevent rotation of the housing that occurs when the valve is shut off. A circuit breaker comprising bracket fixing members provided at both ends of the casing that sandwiches the arm. 2. The circuit breaker according to claim 1, wherein a driving lever is integrally provided on the outside of the housing on the rotating shaft.