JPS6280374A - Automatic cutoff device for master closure valve - Google Patents

Abstract

PURPOSE:To enable a highly reliable connection by performing the connecting/ disconnecting operation at the time of the changeover of a bomb via an isolated coupling by means of a flexible rod. CONSTITUTION:An orthogonal gear 8 is provided on a main shaft 5 to which the turning movement of an operating lever 11 is transmitted via a gear wheel so as to be turned by a double angle. And, by engaging with a clutch 21 in the terminal position of opening path of the operating lever 11 to perform tripping via an electromagnet, an operation body part (not shown in fig.) is constituted. Further, at the end of a flexible rod 4, a coupling (not shown in fig.) capable of being connected or disconnected to the master closure valve is provided. By this constitution, a highly reliable connection can be enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic shutoff device for gas main valves that automatically shuts off the main valves of m or a plurality of LP gas pipes in the event of a fire or an earthquake.

Traditionally, LP gas has been widely used as a fuel for household, business, and industrial purposes. IL is extremely important for secondary disaster prevention.

In addition, there is a strong demand for the practical use of an automatic shutoff device that is inexpensive and can be handled by ordinary householders and has high reliability, which automatically shuts off the gas main valve when a gas leak alarm or the like is activated and in the event of a disaster. Conventional terminal security devices are often useless in preventing the above-mentioned gas blowouts.

Due to the above-mentioned current situation, many proposals have been made for automatic shutoff devices for main valves. For example, Jikko 54-12
733, Publication No. 54-10454, Japanese Patent Publication No. 58-121
374, JP 59-121265, JP 59-16
4498 etc. However, the previous method involved attaching it to the gas main system, which was rather dangerous for ordinary householders.On the other hand, the proposed method of attaching it directly to the cylinder Normally, switching gas cylinders to spare gas cylinders is done by amateur users (7), but many of the proposed configurations require a high degree of installation precision, so there is a critical point where the installation condition affects the reliability of operation. Ta. All of these proposals are for gas cylinders.

In view of the above-mentioned circumstances, the present invention is a method that does not require any processing on the cylinders as well as the gas main system, and allows an amateur to easily attach and detach the gas cylinder. The purpose of this invention is to provide an automatic shut-off device.

The feature of the present invention is that the operating force from the main body of the operating device is transmitted via a flexible rod to open and close the main valve of the gas cylinder, so that the number of cylinders that can be operated can be increased from prefecture to multiple units. This is a proposal for a method that can be widely applied to other countries. In this method, the main body of the operating device is fixedly attached to a suitable wall or the like at the location where the gas cylinder is installed, and the number of flexible ports and doors pulled out from the main body is set to match the number of gas cylinders that are required to be operated. . A removable coupling is provided at the tip of the flexible rod, and the coupling is fitted and coupled to the main valve.

On the other hand, the main body is provided with an energy storage type operation handle, and when the main valve is opened, a clutch is provided that stores energy in a closing spring that has sufficient force to close the circuit and maintains the state at the end of the opening operation. Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a conceptual diagram of the application. For example, in a diagram showing a plurality of gas cylinders for commercial use, it is an installation example in which three gas cylinders are connected at the same time to supply gas. (1) is a gas cylinder, (
2) is the main body of the operating device for the main valve (3), and (4) is a flexible rod.

FIG. 3 is a left side view of FIG. 2.

FIG. 2 is a front internal configuration diagram of the main body (2). The main internal structure includes a main shaft (5) and an intermediate shaft (6), and the main shaft (5) has three sets of helical gears to connect with the rotation shaft (7) of the flexible rod (4). Or orthogonal gears such as bevel gears (8
) are provided at arbitrary distances. Furthermore, a large drive gear (10) is provided between the bearing plates (9) and (9') of the main shaft (5), and is fitted onto the main shaft (5), and a small gear facing the drive gear (10) is provided. (12) and a large gear (13) directly connected to the small CJa (12) are provided on the intermediate shaft (6), and a small gear (14) facing the large gear (13) is connected to the main shaft (5) with a key etc. Connect directly. Therefore, these connections are the operation lever (11), drive gear (10) - small gear (12), large gear (13) - small gear (14), main shaft (5) - orthogonal gear (8), and the rotating shaft. This forms a transmission system. In addition, the main shaft (5) is equipped with a main valve (
3) with a spring (15) strong enough to close the circuit (7).
) will be established.

Generally, the main valve (3) of the gas cylinder (1) requires at least 2 to 3 turns to open when in use, while the operation lever (11) has an operation angle of 90 degrees for ease of manual operation. Then, the selection of the number of teeth of the gear group is now orthogonal 1a (8) &:1': 1, small (1 wheel (x4
), (12) Assuming that the large gear (13) and the drive gear (10) are the same number, and let these be N51NL, the relational expression is /NS
X''/4) X (NL/NS) = (NL/N
S)' Xi/, for example, NL/NS=3
．． If 5 is selected, the right side becomes 3.06, which means that the main valve can be opened about 3 times.

On the other hand, thrust force is applied to the main shaft ■ by the orthogonal gear ■ during rotation, so the thrust bearings (16), (16')
The main shaft (5) has bearing parts (17), (17'),
The intermediate shaft (6) is each supported by a shaft bearing part (18).

In addition, the rotating wheel is provided with the orthogonal gear (8) and the main shaft (5)
In this embodiment, it has three sets of rotating shafts.
It is supported by each bearing (19).

On the other hand, as shown in Fig. 3, the operation lever (11) is in the A position when the main valve (3) is in the closed state, and in the B position in the open state after operation.
Allow it to rotate within a range of positions. Its operating lever (1
The mounting direction in 1) may be arbitrary, but considering wind, rain, and snow when installed outdoors, it is preferable to install it in the downward direction as shown in the figure, which has less influence. The operation lever (11) is provided with a hanging roller (20), and when the circuit is opened, the lever (21) is moved to the B position to maintain that state.
It is made to intertwine with

The clutch (21) is connected to the shaft (22) as shown in Figures 3 and 4.
), and the clutch (
21) is provided with a spring (24) that applies force in the direction of the roofing soil,
A tripping lever (25) is fixed to the other end of the shaft (22) so that it can rotate together. The tripping lever (25) is configured to trip the clutch (21) by energizing an electromagnet (26) for electrically remote control with an external signal. The exception lever (25) is also provided with a configuration that allows it to be manually pushed and removed, although this is not specifically stated.

On the other hand, the pivot shaft (7) fixes the flexible rod (4) in a suitable manner. Since the flexible rod (the leakage) transmits the operating force by rotating the main valve in the open direction or in the opening direction, the torsional deflection due to the rotation must be small.Therefore, it is contradictory to its flexible nature. As a result of various experiments, such as a method using an overlapping drawing configuration of anisotropically wound springs, rather than selecting appropriate materials, we found that it can be used as a material with flexibility and high torsional resistance when used with high pressure hoses used in hydraulic systems. was confirmed.Also, as shown in Figure 6, the flexible rod (4)
If the tube is long, a spiral flexible tube (27) is used for its exterior to prevent meandering curvature, and one end of the tube is fixed to the main body (2). Depending on the installation situation, the flexible rod (4) can be bent to a specified degree using a flexible tube (
It is effective to curve it in advance in step 27).

Now, the other end of the flexible rod (4) has a predetermined length that takes into consideration its placement in the gas cylinder, and a removable coupling (28) is fitted to the main valve (3) as shown in Fig. 5. establish. The coupling (28) is provided with four parts (29) that fit with the outer shape of the main valve (3), and is also provided with a key (30) for maintaining the engaged state. The key (30) is cambred (28) so that a constant force is applied by the tension spring (31).
The other end of the key (30) is shaped like a lever so that the lock can be removed by operating the handle to facilitate attachment and detachment.

The present invention has an operation lever (1) of the operating device main body (2) which is fixed to a wall surface in the configuration of the above embodiment.
1) in the closed circuit position A, close the main valve (3) of the relevant gas cylinder, and slightly move the opposing camp ring (28) in the direction opposite to the closing direction of the main valve (3). The key (30) is automatically engaged when the main valve (13) is fitted and pushed while being rotated and tightened to suppress the effects of play gaps and deflections. In this manner, each coupling (28) is fitted.

Since the preparations have been completed by the above procedure, next pull the operating lever (11) from B to A position. At this time, the circuit closing spring (15) is energized, the hook IL roller (20) is hooked to the clutch (21), and the circuit opening operation is completed. On the other hand, inside the drive gear (1) is directly connected to the operating lever (11).
0) rotates the main shaft (5) dependently and rotates the small gear (14) via the small gear (12) and large gear (13), thus rotating the directly connected main shaft (5), so the orthogonal gear ( 8) rotates and passes through each main valve (3) at the same time via the rotating shaft (7) and the group of flexible rods (4).

On the other hand, in the case of automatic shutoff, operating contacts of a seismic device, gas leak alarm, fire alarm, remote control switch, etc. are arranged in parallel and incorporated into the circuit of the ITL magnet (26), and only one of them is activated. Then, the electromagnet (26) is energized and attracted and hits the release lever (25) to release the clutch (21).
The operating lever (U) loses its application force and closes by accumulating closing force.

At the same time, the internal structure moves in the opposite direction to the opening operation described above to close the main valve (3), so that the gas supply is cut off. If the terminal equipment is in use, the fire will be extinguished in about 2 to 3 seconds due to residual gas in the piping. When the automatic cutoff is completed, the circuit of the electromagnet (26) is deenergized by interlocking an explosion-proof switch (not shown) connected in series.

The following is an explanation of the series of operations. Furthermore, gas cylinder 11
Although three embodiments are not shown in the case of the i group, the rotational force Φ41 may be of course only one.

Next, an embodiment will be described with reference to FIG. 7. FIG. 7 is a diagram showing an embodiment of the operating device main body (2) shown in FIG. 3. That is, in the internal configuration, the operating lever (11)
The intermediate shaft (6) is rotated at a double angle through gears (7).
Either the operating lever (11) and the driving gear (1o) are fixedly integrated and fitted together, or the operating lever (1st part) and the driving gear (10) are spaced apart at appropriate positions and each is attached to an intermediate shaft (6).
), the intermediate shaft (6) is pivotally supported so that the operating lever (11) can be rotated by a predetermined rotation angle, for example, about (3) degrees. In addition, the operation lever (1
Components such as the clutch (21) described in detail above for operation 1) are formed at the intermediate shaft (6) in FIG. 7 in the same manner as in FIG. 3. In addition, a small gear (14) opposing the drive gear (10), a main shaft (5), a rotating shaft (7), a flexible rod (4), and a coupling (28).
The relationship of the opening/closing transmission system to the main valve (3) is similar to that shown in FIG. 3 described above.

In addition, to provide a supplementary explanation regarding the implementation aspects related to gears, in the embodiment shown in FIG.
Assuming that the number of teeth of the orthogonal gear ■ is 3:1 between the main shaft (5) side and the rotating shaft side (7), then the operating lever (11) and the rotating shaft σ) Since the total rotation ratio is 1:12, that is, h rotations: 3 rotations, the number of gears used can be reduced compared to the case of FIG. 3 described above. Therefore,
Even with the configuration of the embodiment shown in FIG. 7, it is possible to provide an operating device main body (2) having the functions of the present invention. In addition, the arrangement of the operating lever (11) in the embodiment shown in FIG. 7 is not limited to the front central part of the main body part (2), but may be arranged on the side surface of the main body part (2) by extending the intermediate shaft (6). It is possible to have a protruding head, so it can be attached to either the left or right side as necessary, so it is easy to use the main body of the operating device (2).
) The mounting location of the operation handle (11) can be arbitrarily selected depending on the mounting location of the operating handle (11).

Further, an embodiment using the principles of the present invention will be explained with reference to FIG. FIG. 8 is a diagram corresponding to FIG. 3, and the difference is that the gear group is not used, and the main shaft (5
) is directly connected to the operating lever (11), and as shown in FIG. 8, the connecting portion with the rotating shaft (2) is comprised of a worm (32) with a relatively coarse pitch and a wheel (33).

Further, the main shaft (5) is provided with a circuit-closing spring (15) for applying a circuit-closing force as shown in FIG. The wheel (3
3) is fixed to the main shaft (5), and the worm (32) is fixed to the rotating shaft (7). Therefore, in the usual usage, the worm side is the drive side, and therefore, rotation in the opposite direction is unreasonable. However, in the configuration of the present invention, the rotation angle of the operating lever (11) is 14 degrees, On the other hand, since the rotation axis (3) only needs to rotate 2 to 3 times as mentioned above, the wheel (33) has a small number of teeth and a small pitch circle, and the worm (32) has a relatively large pitch circle with a relatively large number of leads. By selecting one with ~2 strips, reverse drive transmission can be achieved, so a simple 1114 configuration as shown in FIG. 8 can be used.

In the figure, the rotation shaft (7) is equipped with a thrust bearing (34
) will be established. On the other hand, the relationship between the operating lever (11) and the flexible rod (4) has the same structure and function as described in detail in FIG. 2.

As described above, according to the present invention, it is possible to provide an automatic shutoff device for a main valve that can be widely applied even when using a single gas cylinder or a plurality of gas cylinders.

Therefore, when using a large number of units for commercial purposes in crowded areas such as hospitals or shops, it is especially important to tighten the main valve in order to prevent disasters such as earthquakes, fires, earthquakes, and abnormal gas leaks. It is extremely effective because it can automatically shut off all at once without relying on human power.The automatic shut-off device of the present invention is mounted on the wall near the gas cylinder, and the work of attaching and detaching when switching cylinders is separated by a flexible rod. Since this is done using a fixed coupling, the influence of how the gas cylinder itself is mounted is much smaller than in the past, and the reliability is high. Further, because it is easy to obtain a structure with a large closing force and the coupling can be engaged in a narrow space, it can also be applied to (7) for large industrial gas cylinders.

Furthermore, it has a strong wall mounting method and lever operation type, so
By attaching a wire and a suitable pulley to the control lever, it is possible to close the circuit at night by remote electrical control, and open it in the morning by operating from the indoor cooking area. The effects of applying the present invention are significant.

[Brief explanation of drawings]

Figure 1 is an application conceptual diagram for three gas cylinders. FIG. 2 is a side view of the main body. FIG. 3 is a front sectional view of the main body. FIG. 4 is an explanatory diagram of the interlocking IL clutch section. FIG. 5AB is a structural diagram of the coupling. FIG. 6 is an embodiment diagram of the operating rod. FIGS. 7 and 8 are side views of embodiments of the operating device main body part/2).

Claims (3)

[Claims] (1) An orthogonal gear (8) is provided on the main shaft (5) which doubles the angle of rotation of the operating lever (11) via a gear.
7), and at the same time stores the closing spring (15) to engage the clutch (21) at the opening end position of the operating lever (11), and its release is achieved by the operation of an electromagnet or the like. An operating device main body (2) configured to perform the operation. The flexible rod (4) is connected to the rotating shaft (7) of the operating device main body (2), and the coupling (28) is attached to the tip of the flexible rod (28), which can be attached to and detached from the main valve. An automatic shutoff device for a main valve, characterized in that it is applicable. (2) The automatic shutoff device for a main valve according to claim 1, wherein a flexible tube (27) is provided around the outer periphery of the flexible rod (4) connected to the rotating shaft (7). (3) The operating lever (11) is fixed to the main shaft (5), and the wheel (33) is provided on the main shaft (5), and the gear of the worm (32) is provided on the rotation shaft (7), and the above-mentioned An automatic shutoff device for a main valve according to claims 1 and 2, wherein the turning force of the operating lever (11) is directly applied to the turning shaft (7).