JP6944702B2 - Fluid circuit safety system - Google Patents

Description

The present invention relates to a fluid circuit safety system.

In a fluid circuit equipped with a large number of valves and equipment, when replacing a valve, it is necessary to close the valves before and after the valve to be replaced in order to prevent the fluid from leaking to the outside.

When replacing a valve, the operator visually or by using a fluid circuit diagram identifies the valve that needs to be closed, and then performs the replacement work, but the valve is removed without closing the valve or equipment that must be closed due to oversight or misunderstanding. In some cases.

An object of the present invention is to provide a safety system capable of preventing troubles in performing work without closing a valve to be closed when a valve provided in the fluid circuit is removed from the fluid circuit.

The present invention (1) is a safety system for a fluid circuit including a fluid circuit in which a plurality of valves are connected to a pipe and a control device, and the fluid circuit is a connection portion on the upstream side connected to the upstream pipe. A first valve having a downstream connection portion connected to a downstream pipe, a second valve provided on the upstream side of the first valve, and a downstream side of the first valve. A third valve is provided, and at least one of the upstream side connection portion and the downstream side connection portion is provided with a sensor for detecting connection separation between each pipe and each connection portion. The control device has an instruction unit that issues a closing instruction to the second valve and the third valve when the sensor detects the separation of the piping and the connection portion. It is a system.

In the present invention (1), at least one of the upstream side connection portion and the downstream side connection portion of the first valve to be removed is provided with a sensor for detecting the connection separation between each pipe and each connection portion. When the operator begins to loosen the connection to remove the first valve from the pipe, the sensor detects it and the fluid circuit controller immediately signals the second and third valves to close. Since it is sent to the second valve and the third valve, it is possible to prevent fluid from leaking from the fluid circuit.

In the present invention (2), the first valve is provided with an electronic tag for specifying information on the valve, and when the sensor reacts, the electronic tag is provided with the information on the control device. The control device identifies the second valve and the third valve based on the information and the information of the fluid circuit stored in the control device in advance. The safety system according to the present invention (1).

Since valve information, for example, a number assigned in advance, can be recorded in the electronic tag, when the sensor reacts and the electronic tag receives the signal, the electronic tag has a reaction other than the sensor reacting. Information on these valves can be sent to the controller. When the receiving unit of the control device receives the signal, the control device can identify the second valve and the third valve by using the above information and the information of the fluid circuit stored in the control device in advance. Therefore, even when a plurality of first valves are present in the fluid circuit, it is possible to specify the second valve and the third valve that need to be closed when the first valve is removed.

The present invention (3) is the safety system according to the present invention (1) or (2), wherein the second valve and the third valve are valves that can be remotely controlled, and the control device is a control device. It is a safety system characterized in that it is connected to the second valve and the third valve by wire or wirelessly.

Since the second valve and the third valve are valves that can be operated remotely, the control device that receives the signal from the sensor or electronic tag is the second valve and the third valve that are connected by wire or wirelessly. By sending a signal to close the valve, the second valve and the third valve can be closed automatically without the operator having to go to the site.

The present invention (4) is a safety system including a fluid circuit in which a plurality of valves are connected to a pipe and a control device, and the fluid circuit is provided on the upstream side of the first valve and the first valve. The second valve is provided, and the third valve is provided on the downstream side of the first valve, and the control device has an input unit into which removal information of the first valve is input. , A safety system having an instruction unit for issuing a closing instruction to the second valve and the third valve when removal information is input to the input unit.

Information about the fluid circuit is stored in the control device provided in the present invention (4), and information about the first valve that the operator intends to remove, for example, is attached to the first valve in the fluid circuit. When the assigned number or the like is input to the input unit, the calculation unit of the control device immediately identifies the second valve and the third valve, and instructs the second valve and the third valve to close the valve. Get out of the club.

In this way, the fluid circuit information is stored in the control device, and the control device identifies the second valve and the third valve that should be closed accurately just by inputting the information of the valve to be removed. It is possible to identify the second valve and the third valve to be closed correctly, even if there are many second and third valves in a complicated and intricate fluid circuit, and human error. Can be prevented.

The present invention (5) is the safety system according to the present invention (4), wherein the second valve and the third valve are valves that can be remotely controlled, and the control device is the second valve. It is a safety system characterized by being connected to a valve and a third valve by wire or wirelessly.

Since the second valve and the third valve are valves that can be operated remotely, a signal for the indicator of the control device to close the valve to the second valve and the third valve connected by wire or wirelessly. The second valve and the third valve can be closed automatically without the operator having to go to the site.

According to the safety system of the present invention, when the valve provided in the fluid circuit is removed from the fluid circuit for maintenance or the like, the valve to be closed can be easily and accurately specified.

FIG. 1 shows a schematic diagram of a fluid circuit provided with a plurality of valves. FIG. 2 shows a schematic diagram in which when the first valve is removed, the control device outputs a closing signal to the second valve and the third valve. FIG. 3 shows an embodiment in which a sensor is attached to a connection portion between a pipe and a valve.

Hereinafter, preferred embodiments of the present invention will be described in detail, exemplary, with reference to the drawings. However, unless otherwise specified, the relative arrangement of the components described in this embodiment is not intended to limit the scope of the present invention to that, and is merely an explanatory example. Further, for convenience, the directions of the members and the like may be referred to as up, down, left, and right depending on the directions on the drawings, but these do not limit the scope of the present invention.

FIG. 1 _{shows a fluid circuit equipped with four valves V 1} , V ₂ , V ₃ , and V ₄ , and the flow of fluid is indicated by arrows. Fluid, after passing through the left edge of the valve V _1, flows into the valve V _2, then, is flowing in the right direction through the valve V ₃ and V ₄ is branched into two. All valves are in the ON (open) state and fluid can pass through all the valves.

Each valve _V i (i = _1~4) upstream joint _F iu (i = _1~4) and the downstream side connecting portion _F id (i = _1~4) are provided, these connecting portions valve V _i is attached to the pipe.

In this fluid circuit, in _{order to remove the valve V 2} corresponding to the first valve, it is necessary to close all the valves V _{1 corresponding to the second valve and the valves V 3} and V ₄ corresponding to the third valve.

Figure 2 shows the situation which is being Removing the valve V ₂ in the fluid circuit of Figure 1.

In the embodiment shown in FIG. 2, sensors are provided in both _{the upstream connection portion F 2u} and the downstream connection portion F _2d , and the sensor can detect the separation of either the _{connection portion F 2u} or F _2d. It will be possible.

When the sensors provided in the connecting portions F _2u and F _2d detect the separation of the connecting portions, the signal from the sensor is sent to the receiving unit 13 and processed by the circuit (not shown) in the control device 10. in, sent a signal to close the valve the processed signal from the instruction unit 14 to V _3, V ₄ is V ₁ and the third valve is a second valve, V _1, V ₃ and V The valve of _{4 is closed.} In FIG. 2, a receiving antenna 11 and a transmitting antenna 12 are provided in the receiving unit and the transmitting unit, respectively, and wireless is used for transmitting and receiving signals, but signals may be transmitted and received by wire.

Further, the signal is transmitted to the controller from the sensor, it is conceivable that the valve information from the electronic tag that is provided in the valve V ₂ is transmitted towards the receiver unit. The valve information here is information that can identify the valve such as a number assigned in advance, and by comparing with the information of the fluid circuit stored in advance in the control device, the valves V ₁ , V ₃ and the V _4, can be specified as an object to send a signal for closing the valve.

The valve information is not limited to this, but the valve type, model number, serial number, date of installation in the fluid circuit, date of the previous maintenance, etc. can also be saved, and the operator can save this information. It can be used to perform more appropriate work.

In the embodiment shown in FIG. 2, the valve connecting part F _iu, loosening the connection of F _id, although sensor for detecting it close signal for closing the valve from the control unit 10 in response is transmitted, the valve of the connecting portion F _iu, when no sensor is provided in the F _id is controlled apparatus 10, information of the fluid circuit are stored, inputting the information operator control device of the valve 10 for the removal The operator can be notified by inputting to the unit 15 and displaying it on the first display unit 16, identifying the second valve and the third valve to be closed by the control device 10 and displaying them on the second display unit 17. .. Further, a closing signal can be transmitted to the second valve and the third valve.

FIG. 3 shows a connection portion 30 between the ball valve 20 and the pipe 25. The ball valve 20 has threaded portions 22 at the left and right ends on the upstream side and the downstream side. The connection portion 30 for connection with the pipe 25 includes a bag nut 21, a front ring 23 and a back ring 24, which are internally threaded. The sensor 26 is provided between the buck ring 24 and the bag nut 21.

Fit the bag nut 21, the annular buckling 24, and the annular front ring 23 to the end of the pipe 25, attach the sensor 26 so that it fits between the bag nut 21 and the buckling 24, and screw the pipe 25 into the male thread. After inserting it inside 22, screw and fasten the female screw of the bag nut 21 and the screw of the male thread portion 22.

By this fastening, a compressive force is applied to the sensor, so if the sensor is a pressure sensor, the pressure at the time of fastening is maintained, and if the sensor is a strain sensor, the strain at the time of fastening is maintained.

This held pressure and strain are released when the connection portion 30 is loosened, and the sensor 26 detects the change and transmits a signal to the outside. The signal may be transmitted by wire (not shown) or by radio as shown in FIG. When the signal is taken out by wire, in the embodiment shown in FIG. 2, a through hole (not shown) may be provided in the bag nut 21 and a lead wire (not shown) connected to the sensor 26 may be passed through the through hole. ..

The shape of the sensor 26 is not particularly limited, such as a chip shape or a ring shape, and the number of the sensors 26 may be one, or may be a plurality as shown in FIG.

The sensor 26 is not limited to the pressure sensor and the strain sensor. It is also possible to confirm whether or not the connecting member is disconnected by using a contact sensor, a position sensor, or the like.

The method of arranging and embedding the sensor 26 is a method of providing a recess in a metal member, installing the sensor in the recess and embedding it using an adhesive or the like, a method of press-fitting the sensor in the recess, and a method of brazing. , The method by powder metallurgy sintering, and the like, but the method is not limited thereto.

In the embodiment of FIG. 3, the sensor 26 is attached to the joint of the two compression ring type, but the method of the joint is not limited to this.

V _i: Valve _{F iu:} upstream joint _{F id:} downstream connecting portion 10: Control device 11: receiving antenna 12: transmitting antenna 13: reception unit 14: instruction unit 15: Input unit 16: first display unit 17: Second display 20: Ball valve 21: Bag nut 22: Male thread 23: Front ring 24: Back ring 25: Piping 26: Sensor 30: Connection

Claims (5)

A fluid circuit safety system that includes a fluid circuit with multiple valves connected to a pipe and a control device.
The fluid circuit includes a first valve having an upstream connection portion connected to the upstream pipe and a downstream connection portion connected to the downstream pipe.
The second valve provided on the upstream side of the first valve and
It has a third valve provided on the downstream side of the first valve, and has.
At least one of the upstream side connection portion and the downstream side connection portion is provided with a sensor for detecting connection separation between the piping and the connection portion.
The control device has an instruction unit that issues a closing instruction to the second valve and the third valve when the sensor detects the separation of each pipe and each connection portion. system. The first valve is provided with an electronic tag that identifies the valve information.
When the sensor reacts, the electronic tag transmits the information to a receiving unit provided in the control device.
The safety system according to claim 1, wherein the control device identifies the second valve and the third valve based on the information and the information of the fluid circuit stored in the control device in advance. .. The safety system according to claim 1 or 2.
The second valve and the third valve are valves that can be operated remotely.
A safety system in which the control device is connected to the second valve and the third valve by wire or wirelessly. It is a safety system equipped with a fluid circuit in which multiple valves are connected to piping and a control device.
The fluid circuit includes a first valve, a second valve provided on the upstream side of the first valve, and a second valve.
It has a third valve provided on the downstream side of the first valve, and has.
The control device includes an input unit into which removal information of the first valve is input and an input unit.
A safety system having an instruction unit that issues a closing instruction to the second valve and the third valve when removal information is input to the input unit. The safety system according to claim 4.
The second valve and the third valve are valves that can be operated remotely.
A safety system in which the control device is connected to the second valve and the third valve by wire or wirelessly.

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