JPH083360B2 - Cylinder valve shutoff system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder valve shutoff system, and more particularly to a cylinder valve shutoff system configured to drive an actuator so as to close the cylinder valve even during a power failure.

2. Description of the Related Art As a conventional cylinder valve shutoff system, for example,
A system configured as shown in the figure has been developed. The cylinder main valve shutoff system shown in FIG. 8 is a cylinder main valve shutoff device that closes the main valve 2 of the cylinder 1 when a valve closing switch provided in a remote control box (not shown) is operated. Has been applied. In FIG. 8, 3 is an actuator box, 4 is a solenoid valve for closing the valve, 5 is a solenoid valve for closing the valve at power failure, 6 is a pressure reducing valve, and 7 is a cylinder. Further, the cylinder 7 has a piston 7a driven in the arrow X ₂ direction (valve closing direction) by the supply of compressed air, and the piston 7a has an output shaft 7b,
It is connected to the handle of the main valve 2 via the universal joint 8. The actuator box 3 has an air source (not shown)
An air supply joint 3a connected to the solenoid valve 4 and an exhaust joint 3b connected to the exhaust port of the solenoid valve 4 are provided.

When a valve closing switch of a control box (not shown) provided at a position away from the cylinder installation location is operated, the valve closing solenoid valve 4 is switched, and the compressed air from the air supply joint 3a is transferred to the solenoid valve 4 , 5 and the pressure reducing valve 6 are supplied to the cylinder 7. As a result, the piston 7a moves in the X ₂ direction and the handle of the main valve 2 is driven in the valve closing direction. During a power failure,
Both the solenoid valves 4 and 5 are deenergized, and the compressed air from the air supply joint 3a is supplied to the cylinder 7 via the solenoid valve 5 for closing the valve at the time of power failure to close the main valve 2.

However, in the above cylinder main valve shutoff system, the solenoid valve 5 for closing the valve at the time of power failure must be provided for each actuator box 3. For example, when a plurality of cylinders 1 are installed, a plurality of cylinders 1 are installed. The solenoid valve 5 for closing the valve at the time of power failure is required. Therefore, if the conventional system is configured to close the main valves 2 of a plurality of cylinders, the solenoid valve 5 remains normally energized, so that the power consumption and the heat generation amount increase and the temperature inside the actuator box 3 remarkably increases. There is a problem that it will rise.

Further, in the above-mentioned conventional system, since a plurality of solenoid valves 5 for closing the valve at the time of power failure are provided in each actuator box 3, the changing work is troublesome when changing the use so as not to close the main valve 2 at the time of power failure. There are also issues such as

Therefore, an object of the present invention is to provide a cylinder valve closing system that solves the above problems.

Means for Solving the Problems The present invention provides a plurality of cylinders filled with gas, a main valve for opening and closing a cylinder provided for each cylinder, and a plurality of main valves, each of which is connected to an air source and is connected to an air source. A plurality of actuators for closing each of the main valves by the supply of compressed air, an air pipe having a plurality of branch pipes, one side being a common pipe communicating with the air source, and the other side being a plurality of branch pipes communicating with the actuators, respectively. In a cylinder valve shutoff system, which comprises a plurality of valve closing solenoid valves provided in the branch pipe and switched to supply or stop compressed air from the air source to the actuator, one end communicates with the air source. The bypass pipe to which compressed air is constantly supplied from the air source, one port is connected to the other end of the bypass pipe, and the other port is connected to the plurality of actuators. Solenoids for shutting off the valve during a power failure, which cut off the supply of compressed air from the bypass pipe to the plurality of actuators when energized and supply compressed air from the bypass pipe to the plurality of actuators when not energized. A valve and are provided.

Function By sharing one solenoid valve for valve closing at the time of power failure with multiple actuators, power consumption and heat generation are reduced and temperature rise is suppressed. Also, a common solenoid valve 1 for closing the valve during a power failure.
The specifications can be changed so that the main valve will not close in the event of a power failure simply by removing the individual and bypass piping.

First Embodiment FIGS. 1 and 2 show a schematic configuration of a cylinder valve closing device to which a first embodiment of a cylinder valve closing system according to the present invention is applied.

In both figures, for example, a plurality of cylinders 11 ₁ to 11 ₄ are high-concentration semiconductor material gas is sealed. Each of the cylinders 11 _{1 to} 11 ₄ is stored in a cylinder storage box 12 while being held in a vertically standing state with a predetermined space therebetween. Cylinder 11 ₁ ~ 1
Main valves 13 _{1 to} 13 ₄ are attached to the upper part of 1 ₄ . Original valve 13
_{1-13 4} has an operating handle 13a thereon, and opened and closed by rotational operation of the operating handle 13a, it is adjusted the valve opening. Therefore, a gas having a flow rate according to the valve opening degree of the main valves 13 _{1 to} 13 ₄ flows out from the cylinders 11 _{1 to} 11 _{4 and} is connected to the main valves 13 _{1 to} 13 ₄ through the pipe 14 connected in communication with the cylinder storage box. 12 externally supplied.

15 ₁ in the actuator box, which is disposed on the upper surface of the top plate 12a of the cylinder storage box 12, a cylinder 11 ₁ to 11
It is located farther than ₄ . Actuator box 15 ₁
The output shaft 16 of the is inserted into the top plate 12a and the cylinder storage box 2
It projects inside. Further, the output shaft 16 is connected to the universal joint 17.

18 is a chuck, is fitted to the outer periphery of the operating handle 13a of the base valve 13 _1. The chuck 18 is also connected to the universal joint 17. Therefore, the output shaft 16 of the actuator box 15 ₁ is connected to the chuck 18 via a universal joint 17.

19 is a control box, a cylinder storage box 12
It is provided at a position further away, and on the front surface thereof, a valve closing switch 19a1 to 19a4 for supplying a valve closing signal for closing the main valve 13 _{1 to} 13 ₄ to each actuator box 15 ₁ to 15 ₄ and an emergency It has a cutoff switch 19b.

The control box 19 is connected to each actuator box 15 _{1-15 3} through the signal line 19c to transmit an electrical signal.

Reference numeral 20 is an air source, and 21 is an air pipe connected to the air source. The air pipe 21 is a common pipe whose one end is connected to the air source 20.
21a and a branch pipe 21 that branches from the other end of the common pipe 21a and supplies compressed air to each actuator box 15 ₁ to 15 ₃
b _{1 to} 21b ₄ .

Although the transmission mechanism between the main valve 13 ₁ and the actuator box 15 ₁ for the cylinder 11 ₁ is shown in FIG. ₁ , other cylinders 11 _{2 to} 11 ₄ have the same structure. Illustration and description thereof are omitted here.

Thus, in the cylinder storage box 12, a plurality of (four in this embodiment) cylinders 11 _{1 to} 11 ₄ and each cylinder 11 ₁ to
11 of the plurality attached to the ₄ main valve _131-134, a plurality of actuators box 15 _{1-15 4} is installed in centralized in one location. 22 is a solenoid valve for closing the valve at the time of power failure, bypass piping 23 branched from air piping 21 and each actuator box
The exhaust pipes 24 _{1 to} 24 ₄ from 15 ₁ to 15 ₄ are connected to a common exhaust pipe 25. The solenoid valve 22 is, for example, a spring offset solenoid type valve, and is normally energized to connect the common exhaust pipe 25 and the exhaust pipes 24 _{1 to} 24 ₄ . However, when de-energized, the bypass pipe 23 and the exhaust pipes 24 _{1 to} 24 ₄ communicate with each other to supply compressed air to the actuator boxes 15 ₁ to 15 ₄ via the exhaust pipes 24 _{1 to} 24 ₄ .

As described above, in the present embodiment, the solenoid valve 22 for closing the valve at the time of power failure is provided in the middle of the exhaust pipe, so that at the time of power failure, the actuator box 15 is connected via the exhaust pipes 24 _{1 to} 24 ₄ as described later.
Compressed air can be supplied to ₁ to 15 ₄ to close each of the main valves 13 _{1 to} 13 ₄ to simplify the piping structure.

Here, the configuration of the air circuit 10 of the cylinder valve shutoff system will be further described. Incidentally, FIG. 2 shows a normal state of the actuator boxes 15 ₁ and 15 ₂ .

In Figure 2, the actuator box 15 ₁ has a valve-closing solenoid valve 27 operated by the operation signal from the control box 19. This solenoid valve 27 has the air piping described above.
21 is connected. When solenoid valve 27 is activated, air piping
Compressed air from 20 is introduced into a cylinder 28 as an actuator via a solenoid valve 27.

The solenoid valve 27 is a spring offset solenoid type switching valve, and when a valve closing signal is supplied from the control box 19, the solenoid 27a is excited and the solenoid 27a is switched against the spring 27b. When not energized, the solenoid valve 27 is open to the atmosphere due to the pressing force of the spring 27b. In addition, the solenoid valve 27 is
An air supply port 27c connected to an air supply pipe 29 that communicates with the air pipe 21 via a port, a port 27d connected to a valve closing pipe 30 and an exhaust pipe 32 communicating with an exhaust pipe 24 ₁ via an exhaust joint 31. And an exhaust port 27e to which is connected.

The solenoid valve 22 for closing the valve at the time of power failure is a switching valve that maintains an operating state against the spring 22b by the energization of the energized solenoid 22a. The solenoid valve 22 has a port 22c to which the bypass pipe 23 is connected and a port 22d to which the common exhaust pipe 25 is connected.
And a port 22e connected to the exhaust pipes 24 _{1 to} 24 ₃ . Since the solenoid valve 22 is normally energized, the bypass pipe 23 is closed and the common exhaust pipe 25 and the exhaust pipe are closed as shown in FIG.
24 _{1 to} 24 ₃ are maintained in communication with each other, and when not energized, the bypass pipe 23 and the exhaust pipes 24 _{1 to} 24 ₃ are connected by returning to the non-operating state by the pressing force of the spring 22b as described later. Then, the bypass pipe 23 is opened.

This solenoid valve 22 is normally energized, but since only one solenoid valve 22 is provided on the upstream side of the plurality of solenoid valves 27 for closing the valve, it consumes less power than the conventional one (shown in FIG. 8). The calorific value is also decreasing.

Further, in this embodiment, in order to prevent the main valves 13 _{1 to} 13 ₄ from closing in the event of a power failure, it is sufficient to keep the solenoid valves 13 _{1 to} 13 ₄ in the non-energized state, so that the specifications can be easily changed. It is possible to

Reference numeral 33 is a source pressure valve for reducing the compressed air from the solenoid valve 22 to a predetermined pressure, and 34, 35, 36 are check valves, respectively.

A power unit 37 has a liquefied gas container 38 for generating high-pressure gas in an emergency and an opening mechanism 39 for opening the container in response to an emergency cutoff signal from the control box 19. Incidentally, the container 38 is connected to the valve閉配tube 30 of the actuator box 15 ₁ via the gas pipe 40. Therefore, when the opening mechanism 39 operates to open the container 38 in an emergency, the high-pressure gas in the container 38 is supplied into the cylinder 28.

The actuator boxes 15 ₂ to 15 ₄ other than the above have the same configuration as the actuator box 15 _1, and therefore the description of the other actuator boxes 15 ₂ to 15 ₄ will be omitted.

Here, the operation of the cylinder valve closing device having the above-mentioned configuration will be described.

Main valves 13 _{1 to} 13 mounted on multiple cylinders 11 _{1 to} 11 _3
4 is opened by the operator opening the operation handle 13a. Then, the gas filled in the bomb 11 ₁ to 11 ₄ is supplied via the pipe 14. At this time, the valve closing solenoid valve 27
Is in a non-energized state, and the solenoid valve 22 for closing the valve during a power failure is energized.

When the gas supply is finished and the gas supply is stopped, the operator operates the valve closing switch 19a1 of the control box 19.
Thereby, the valve closing signal to the actuated Box 15 ₁ from the control box 19 is a solenoid 27a of the transmitted valve-closing solenoid valve 27 is energized. Therefore, the spring 27b of the solenoid valve 27
The air supply pipe 29 and the valve closed pipe 30 are communicated with each other. As a result, the compressed air from the air source 20 is supplied into the cylinder 28 via the solenoid valve 27 and the valve closing pipe 30, and the cylinder 28
The inner piston 28a is moved in the X ₂ direction. This piston 2
The output shaft 16 is the driving force of 8a, the universal joint 17, is transmitted to the operating handle 13a of the main valve 13 ₁ via the coupling 18 to rotate the operating handle 13a in the valve closing direction. The main valve 13 ₁ is closed, to stop the gas supply.

Incidentally, the valve opening switch 19a ₂ in the other cylinder 11 _{2-11 4}
Similar to the operation is performed by operating the through 19a _4.

Next, let us consider the operation when a power failure occurs during normal gas supply.

In this case, the valve closing solenoid valve 27 keeps the exhaust pipe 32 and the valve closing pipe 30 communicating with each other, as shown in FIG. However, when there is a power failure, the normally energized valve closing solenoid valve 22 is switched by the spring force of the spring 22b and the bypass piping 23
Communicate with the exhaust pipes 24 _{1 to} 24 ₄ . Therefore, the compressed air from the air source 20 is supplied to the valve closed pipe 30 via the bypass pipe 23 and the exhaust pipes 24 _{1 to} 24 ₄ . Therefore, the cylinder 28 operates in the same manner as when the valve is closed to close the main valves 13 _{1 to} 14 ₄ . Thus, it is possible to drive the single solenoid valve 22 is de-energized a plurality of actuators box 15 _{1-15 4} of each cylinder 28 at the same time in the valve closing direction in this embodiment.

A second embodiment of the present invention is shown in FIGS. still,
FIG. 4 shows the operating state during a power failure. Further, in both figures, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In Figure 3, the actuator box 15 _{1-15 4} source valve
The rotary actuators 41 _{1 to} 41 ₄ (shown in FIG. 4) for driving the operation handle 13a of 13 are housed.

The control box 19 has a valve close switch 19a1
19a4 and an emergency cutoff switch 19b are arranged, and inside thereof, an air circuit 42 and a control circuit 43 shown in FIG. 4 are provided.

Air source 20 is control box via air line 44
The control box 19 is connected to each of the actuators 41 _{1 to} 41 ₄ via air pipes 45 _{1 to} 45 ₄ .

As shown in FIG. 4, in this embodiment, the air circuit 42 is provided in the control box 19 and each actuator 41
₁ has a to 41 ₄ with the connected valve-closing solenoid valve 46 _{1-46 4,} a power outage valve-closing electromagnetic valve 47, a pressure reducing valve 33, and a check valve 35. The control box 19 is provided with an air supply joint 48, an exhaust joint 49, and air supply joints 50 ₁ to 50 ₄ to which an air pipe 44 is connected.

53 is a common pipe connected to the air supply fittings 48, 54 ₁ to 54 ₄ is a branched branch pipe in parallel from the common pipe 53. The branch pipes 54 _{1 to} 54 ₄ are connected to the air supply joints 50 ₁ to 50 ₄ via valve closing solenoid valves 46 _{1 to} 46 ₄ . Each actuator 41
_{1-41 4} and the output shaft 41a within the output shaft 41a and integrally vanes
Has 41b, the output shaft 41a and the vane 41b and the compressed air is supplied via a respective air line 45 _{1-45 4} allowed to close the respective main valve _131-134 to rotate in a clockwise direction.

Third actuators hox 15 _1-15 fewer pipe connected to ₄ as shown in FIG. In this embodiment, has the advantage facilitates the connection work of pipes than in the first embodiment ing.

Reference numeral 55 is a bypass pipe, one end of which is connected to the branch pipe 54 ₁ on the upstream side of the valve closing solenoid valve 46 ₁ and the other end of which is connected to the air supply port 47c of the solenoid valve 47. An exhaust pipe 56 has one end connected to the port 47e of the solenoid valve 47 and the other end connected to each exhaust port 46e of the solenoid valves 46 _{1 to} 46 ₄ .

57 is an exhaust pipe, one end of which is connected to the exhaust joint 49 and the other end of which is open to the atmosphere.

Normally, each valve closing solenoid valve 46 _{1 to} 46 ₄ is not energized,
When the valve closing signal from the control circuit 43 is energized, the solenoid 46a is excited. Therefore, normally, the ports 46d and 46e of the solenoid valves 46 _{1 to} 46 ₄ are communicated with each other, and the solenoids 46a are excited to switch the ports 46c and 46d.
Further, the solenoid valve 47 for closing the valve at the time of power failure is provided on the upstream side of the solenoid valve for closing the valve 46 ₁ and is normally energized.
47a is excited and connects ports 47e and 46d. Therefore, in the air circuit 42, each of the air pipes 45 _{1 to} 45 ₄ ,
Exhaust pipes 56 and 57 communicate with each other via solenoid valves 46 _{1 to} 46 ₄ and 47.

Here, when the operator presses the valve closing switch 19a1 of the control box 19, it switched solenoid 46a of the solenoid valve 46 ₁ is energized, passed port 46c and 46d are communicated. Therefore, the compressed air supplied from the air pipe 44 is supplied to the actuator 41 ₁ via the common pipe 53, the pressure reducing valve 35, the branch pipe 54 ₁ , and the air pipe 45 ₁ . And actuator 4
1 ₁ of the output shaft 41a is driven by a cylinder 11 ₁ of the main valve 13 ₁ is the valve closes. Other actuators 41 _{2 to} 41 ₃ are also solenoid valves 46 _{2 to} 46 ₄
The main valves 13 _{2 to} 13 ₄ are closed as described above by the switching operation of.

In addition, at the time of power failure, the solenoid valves 46 _{1 to} 46 ₄ and 47 are de-energized, and the ports 46e and 46d and port 47
Connect c and 47e. Therefore, the compressed air supplied from the air pipe 44 is the common pipe 53, the branch pipe 54 ₁ , the bypass pipe 55,
It is supplied to each actuator 41 _{1 to} 41 ₄ via an exhaust pipe 56 and an air pipe 45 _{1 to} 45 ₄ . And each actuator 41
_{1 to} 41 ₄ are driven by the output shaft 41a and the main valve 1 of the cylinder 11 _{1 to} 11 ₄
3 _{1 to} 13 ₄ are closed.

 5 to 7 show a modification of the second embodiment.

In FIG. 5, the control box 19 is mounted on the top plate 12 a of the cylinder storage box 12. When there is no place to install the control box 19, the control box 19 may be placed directly on the cylinder storage box 12 to secure the installation space. In this case, the control box 19 will be located at a height of about 2 m.

FIG. 6 shows details of the control box 19. Sixth
In the figure, on the front of the control box 19, a buzzer 72 that issues an alarm when an abnormality such as a pressure drop occurs, a switch 61 with a power indicator lamp, a switch 62 with an emergency shutoff indicator lamp, a buzzer stop switch 63, a mounting failure indicator lamp 64, and pressure. A drop indicator lamp 65 and switches 66 _{1 to} 66 ₄ with a valve close indicator lamp are provided. Further, an air supply joint 48, an exhaust joint 49, air supply joints 50 ₁ to 50 _{4 and the} like are arranged on the upper surface of the control box 19.

As shown in FIG. 5, when the control box 19 is mounted on the cylinder storage box 12, it is inconvenient for the operator to operate each switch without using a step or the like when pressing each switch. Therefore, a remote control box 67 is installed at a lower position of the wall 12b on the side surface of the storage box 12. The remote control box 67 is provided with mounting holes 67a at four corners, and an emergency cutoff switch 68, a buzzer stop switch 69, and valve closing switches 70 ₁ to 70 ₄ are provided on the front surface. Also, the remote control box 67 has a signal line 71.
Is connected to the control circuit 43 in the cotton roll box 19 via.

Even if the control box 19 is installed at a high place on the cylinder storage box 12, the lighting of each lamp can be visually confirmed, so that the operator can see the lamp display of the control box 19 and set the remote control at a relatively low position. The switches 68, 69, 70 ₁ to 70 ₄ of the box 67 can be easily operated without using a step or the like. Further, the remote control box 67 is not limited to the wall portion 12b of the cylinder storage box 2, and may be provided in another place as long as the control box 19 can be seen.

In the above embodiment, the cylinder valve shutoff device has been described as an example, but it goes without saying that the present invention can also be applied to a cylinder valve open / close device.

EFFECTS OF THE INVENTION As described above, in the cylinder valve shutoff system according to the present invention, one end communicates with the air source, and the bypass pipe to which compressed air is constantly supplied from this air source and the other end of the bypass pipe are provided. Ports are connected and other ports are connected to multiple actuators respectively.When the power is on, the supply of compressed air from the bypass pipe to the multiple actuators is cut off, and when the power is off, the compressed air is supplied from the bypass pipe to the multiple actuators. There is a solenoid valve for closing the valve during a power failure. For this reason, multiple actuators can be closed by one solenoid valve for valve closing at power failure, and therefore power consumption due to energization to the solenoid valve for valve closing at power failure even in the normal energized state. Therefore, it is possible to suppress heat generation and prevent a remarkable temperature rise as compared with the conventional case that requires a plurality of solenoid valves for closing valves at the time of power failure. Furthermore, if the cylinder shut-off function at the time of power failure is unnecessary, the specifications can be easily changed by simply removing one solenoid valve for valve closing at the time of power failure and the bypass piping, and it is possible to easily meet customer orders. It has features such as

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cylinder valve shutoff device to which a first embodiment of a cylinder valve shutoff system according to the present invention is applied, and FIG. 2 is a configuration diagram for explaining an air circuit of the first embodiment. ,
FIG. 3 is a schematic configuration diagram of a second embodiment of the present invention, FIG. 4 is a configuration diagram of an air circuit of the second embodiment, and FIGS. 5 to 7 are modification examples of the second embodiment of the present invention. FIG. 8, a front view of a control box, a front view of a remote control box, and FIG. 8 are schematic configuration diagrams of a conventional cylinder valve shutoff system. 10 …… Air circuit, 11 _{1 to} 11 ₄ …… Cylinder, 12 …… Cylinder storage box, 13 _{1 to} 13 ₄ …… Main valve, 13 a …… Operation handle, 5 ₁ to 15 ₄ …… Actuator box, 16… Output shaft, 17 universal joint, 18 chuck, 19 control box, 19a1 to 19a4 valve closing switch, 20 air source, 21 air piping, 21a common piping, 21b1 21b4
...... Branch piping, 22 ...... Solenoid valve for valve closing at power failure, 23 ...... Bypass piping, 24 _{1 to} 24 ₄ ...... Exhaust piping, 25 …… Air supply joint, 27
...... Solenoid valve for valve closing, 41 _{1 to} 41 ₄ ...... Actuator, 42 ...
… Air circuit, 44,45 _{1 to} 45 ₄ …… Air piping, 46 _{1 to} 46 ₄ ……
Solenoid valve for closing valve, 47 ... Solenoid valve for closing valve at power failure, 54 _{1 to} 54 ₄ ...
… Branch piping, 55 …… Bypass piping, 56,57 …… Exhaust piping, 67 …… Remote control box.

Claims (1)

[Claims] 1. A plurality of cylinders filled with gas, a main valve for opening and closing a cylinder provided for each cylinder, and a plurality of main valves, each of which is connected to each of the main valves and is supplied with compressed air from an air source. A plurality of actuators for closing the respective main valves; an air pipe having a plurality of branch pipes having one side communicating with the air source and the other side having a plurality of branch pipes communicating with the actuators; and the branch pipes. , A cylinder valve closing system comprising a plurality of valve-closing solenoid valves that switch between supplying or stopping supply of compressed air from the air source to the actuator, wherein one end communicates with the air source, and A bypass pipe to which compressed air is constantly supplied, one port is connected to the other end of the bypass pipe, and the other port is connected to each of the plurality of actuators. And a solenoid valve for closing a valve during a power failure that supplies compressed air from the bypass pipe to the plurality of actuators when energized and supplies compressed air from the bypass pipe to the plurality of actuators when not energized. A cylinder valve shutoff system featuring.