JP3200092U - Valve opening / closing device - Google Patents

Abstract

Provided is a valve opening / closing device capable of remotely operating the opening / closing of a valve and remotely confirming the opening / closing state of the valve. A valve fitting portion that is directly or indirectly fitted to a rotating shaft of a valve to be controlled and is rotatable about the same axis as the rotating shaft, and the valve to be controlled closes the valve fitting portion. A power storage unit that stores power to be rotated in the direction, a handle unit 14 that stores power in the power storage unit, and rotates the valve fitting unit in a direction in which the valve to be controlled is opened, and the power storage unit. A switching unit that switches between holding and releasing power, a control unit that controls the open / closed state of the valve to be controlled by switching the switching unit, the rotational state of the valve fitting unit, and / or interlocking with the valve fitting unit And a valve open / close state detecting means for detecting the open / close state of the valve to be controlled by reading the rotation state of the interlocking member through the optical fiber 13. [Selection] Figure 1

Description

  The present invention relates to a valve opening / closing device that remotely controls a closing operation of a valve to be controlled and remotely detects an open / closed state of the valve to be controlled.

  2. Description of the Related Art Conventionally, a valve opening / closing device that opens and closes a valve of a gas cylinder or a gate valve by remote control is known. Further, a valve opening / closing device having a function of automatically closing the valve in an emergency or the like is known. These are devices that open and close the valve by remotely operating an electromagnetic solenoid or the like to rotate the rotating shaft of the valve to be controlled. However, it is conceivable that the valve opening / closing device breaks down or that an obstruction or the like is interposed in the drive portion of the device to hinder the valve opening / closing operation. Therefore, in order to ensure the opening and closing of the valve, there is a problem that it is necessary to visually check the valve to check whether or not the valve is opened and closed as intended.

  In order to solve this problem, it is conceivable to transmit a detection value of a pressure gauge or a flow meter connected to a gas cylinder or the like and detect the valve open / close state from the detection value. However, the detection of the valve open / close state by these methods is indirect, and is not a means for directly detecting whether or not the valve body is truly opened / closed. Therefore, conventionally, there is no means for remotely detecting whether or not the valve is opened and closed as intended, and in order to ensure the opening and closing of the valve, it is still necessary to visually check the valve. There is.

  It is troublesome to visually check the open / closed state of the valve every time the valve is opened / closed. In some cases, such as an emergency, the valve cannot be seen directly. Therefore, there is a need for a valve opening / closing device that can remotely control the opening / closing of the valve and can confirm whether the valve is opened / closed as intended.

  Patent Document 1 discloses a cylinder base automatic opening / closing device having a blade plate detection mechanism having a limit stopper. Although this device detects the open / closed state of the valve with an electric switch, it has a current-carrying location in the vicinity of the cylinder and is therefore difficult to use in a flammable atmosphere. In order to be able to be used even in a flammable atmosphere, it is preferable that the valve opening / closing device is not provided with a current-carrying portion, and there is no valve opening / closing device configured in this way. Patent Document 2 discloses a valve opening / closing device. However, this valve opening / closing device cannot detect the opening / closing state of the valve.

Japanese Utility Model Publication No. 60-91894 JP 2009-115197 A

  An object of the present invention is to provide a valve opening / closing device that can remotely control the closing of a valve to be controlled and can remotely detect the open / closed state of the valve. Furthermore, it is providing the valve opening / closing apparatus comprised without providing the energization location in the drive part of a valve opening / closing apparatus, or valve vicinity.

  In order to solve the above-mentioned problems, the present inventor has a member engaged with the valve fitting portion and / or a rotation state of the valve fitting portion that rotates the valve to be controlled integrally with the rotary shaft of the valve. It was conceived to detect the open / closed state of the valve to be controlled by optically reading the rotation state of the control valve. And the method of optically detecting the rotation state of the valve fitting portion and / or the rotation state of the member interlocking with the valve fitting portion through the optical fiber finds that the above problem can be solved, and the present invention is completed. It came to do.

  The present invention for solving the above problems is as described below.

[1] A valve opening and closing device that opens and closes the valve to be controlled by rotating a rotating shaft of the valve to be controlled.
A valve fitting portion that is directly or indirectly fitted to the rotary shaft of the valve to be controlled and is rotatable about the same axis as the rotary shaft;
A power storage unit that stores power for rotating the valve fitting unit in a direction in which the valve to be controlled is closed;
A handle portion that accumulates power in the power accumulation portion and rotates the valve fitting portion in a direction in which the valve to be controlled opens.
A switching unit that switches between holding and releasing the power stored in the power storage unit;
A control unit that controls opening and closing of the valve to be controlled by switching the switching unit;
Comprising
A valve opening / closing state detecting means for detecting an opening / closing state of the valve to be controlled by reading through a fiber optic the rotation state of the valve fitting portion and / or the rotation state of the interlocking member interlocking with the valve fitting portion. A valve opening and closing device characterized by that.

  [2] The valve opening / closing device according to [1], wherein an optical mark is attached to the interlocking member.

  [3] The valve opening / closing apparatus according to [1], wherein a dog is connected to the interlocking member.

  [4] The valve opening / closing device according to [3], wherein the dog has a function of preventing excessive rotation of the rotary shaft of the valve to be controlled.

  [5] The valve opening / closing apparatus according to any one of [1] to [4], wherein the interlocking member is a gear.

  [6] The valve opening / closing apparatus according to [1], wherein an optical mark is attached to an outer peripheral portion of the valve fitting portion.

  [7] The valve opening / closing apparatus according to [1], wherein the power storage unit is a spring spring wound around a direction parallel to the axis of the valve fitting unit.

  [8] The valve opening / closing apparatus according to [1], further including a display unit that displays an opening / closing state of the control target valve read by the valve opening / closing state detection unit.

  According to the valve opening and closing device of the present invention, the rotation state of the valve fitting portion that rotates together with the rotation shaft of the valve to be controlled and / or the rotation state of the interlocking member that interlocks with the valve fitting portion is optically transmitted through the optical fiber. Detect. Thereby, the actual open / closed state of the control target valve can be detected remotely. Moreover, since it detects remotely through an optical fiber, there is no electricity supply location around the drive part of a valve opening / closing device. Therefore, the valve opening / closing device of the present invention can be used even in a flammable atmosphere.

FIG. 1 is a side view showing a configuration example of a valve opening / closing device of the present invention. FIG. 2 is a bottom view showing a configuration example of the valve opening / closing device of the present invention. FIG. 3 is a perspective view showing a configuration example of the valve opening / closing device of the present invention. FIG. 4 is an explanatory view showing an unfolded mark attached to the outer peripheral portion of the valve fitting portion. FIG. 5 is an explanatory view showing a mark attached to the outer peripheral portion of the valve fitting portion. FIG. 6 is an explanatory view showing a state in which the valve opening / closing device of the present invention is attached to a gas cylinder. FIG. 7 is an explanatory diagram showing a configuration example of the lock mechanism. FIG. 8 is an explanatory diagram illustrating an example of a sign attached to a member that is interlocked with the valve fitting portion.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  First, a configuration example of the valve opening / closing device of the present invention will be described. FIG. 1 is a side view showing a configuration example of the valve opening / closing device of the present invention, and FIG. 2 is a bottom view thereof. FIG. 3 is a perspective view illustrating the internal structure of the drive unit 18 of FIG. The valve opening / closing device is a valve opening / closing device that opens and closes the control target valve by rotating a rotation shaft of the control target valve. In this valve opening / closing device, the operation of opening the control target valve is performed by manually rotating the handle 14, and the operation of closing the control target valve is performed by remote control.

  In FIG. 1, 18 is a drive part of a valve opening / closing device. Reference numeral 10 denotes a housing, which is fixed around the control target valve by a fixing tool 30 via a support column 32. A valve fitting portion 12 having a circular outer periphery is accommodated in the housing 10. A rotary shaft 20 is attached to the upper portion of the valve fitting portion 12 with the same axis. The valve fitting portion 12 is configured to be fitted directly or indirectly to a rotation shaft of a control target valve (not shown) and to be rotatable about the same axis as the rotation shaft of the control target valve. That is, the axis of the rotating shaft of the valve to be controlled is the same as the axis of the rotating shaft 20 of the valve opening / closing device of the present invention. When the valve fitting part 12 rotates, the rotating shaft of the valve to be controlled rotates, and the valve to be controlled is opened and closed according to the rotation direction.

  An air cylinder 22, a lock mechanism 24, and a spring spring 26 are disposed in the housing 10.

  The mainspring 26 accumulates power for rotating the valve fitting portion 12 in the direction in which the valve to be controlled is closed. The spring spring 26 is wound around the axis parallel to the axis of the valve fitting portion 12. A handle 14 is attached to the mainspring 26 with the same axis as the mainspring 26. Below the handle 14, a gear 19a is attached with the same axis. A gear 19b is meshed with the gear 19a. A gear 19c is engaged with the gear 19b. The rotary shaft 20 is attached to the gear 19c with the same axis. That is, the rotation of the handle 14 in a predetermined direction transmits the gears 19a, 19b, and 19c to rotate the rotating shaft 20 and the valve fitting portion 12 in a direction in which the control target valve is opened. In addition, the mainspring 26 is wound up by rotating the handle 14 in the predetermined direction. In the wound spring 26, the power for transmitting the gears 19a, 19b, and 19c to rotate the rotating shaft 20 and the valve fitting portion 12 in the direction in which the controlled valve is closed is accumulated.

  One end of a driving gas supply pipe 17 is connected to the air cylinder 22 via a driving gas supply port 16. The other end of the driving gas supply pipe 17 is connected to a driving gas supply source (not shown) (for example, a compressor or a driving gas cylinder). A lock mechanism 24 is connected to the air cylinder 22.

  The lock mechanism 24 is configured to switch between holding and releasing the power accumulated in the mainspring 26 (hereinafter also referred to as “switching unit”). The lock mechanism 24 is configured to prevent the rotation shaft 20 and the valve fitting portion 12 from rotating in a predetermined direction during operation thereof. That is, the lock mechanism 24 is configured to hold the power accumulated in the mainspring spring 26 while the driving gas is filled in the air cylinder 22 at a predetermined pressure. On the other hand, when the driving gas in the air cylinder 22 becomes a predetermined pressure or lower, the lock mechanism 24 is configured to release the power accumulated in the mainspring 26.

  The flow rate of the driving gas supplied from the driving gas supply pipe 17 is adjusted by a control unit (not shown). The driving gas is not particularly limited, but compressed air or nitrogen gas is preferable.

  FIG. 7 is an explanatory diagram showing an example of the lock mechanism. A ratchet gear 81 having a ratchet mechanism is fixed to the gear 19b with the same axis. The ratchet gear 81 is configured not to rotate when the mainspring 26 is wound up, but to rotate only when the mainspring 26 releases the accumulated power and returns. The ratchet gear 81 is engaged with a gear 82 to which a helical gear 83 is fixed with the same axis. A screw gear 84 is meshed with the helical gear 83. A blade-like damper 85 is fixed to the screw gear 84. A lock shaft B 86 is disposed in the vicinity of the damper 85. The lock shaft B 86 is connected to the lock shaft A 87. The lock shaft A 87 and the lock shaft B 86 have a seesaw mechanism, and are configured such that when one moves up, the other moves down. When the lock shaft B 86 is lowered, the lock shaft B 86 and the damper 85 come into contact with each other, and the damper 85 is locked so as not to rotate. On the other hand, when the lock shaft B 86 is raised, the damper 85 is configured to be rotatable. The lock shaft B 86 is biased in the upward direction by the spring 86a.

  The air cylinder 22 is configured to allow a rod (not shown) to protrude in accordance with the pressure in the cylinder and to switch whether or not to maintain the state where the lock shaft B 86 is lowered. When the lock shaft A 87 is raised, the lock shaft B 86 is lowered. The air cylinder 22 maintains a state in which the lock shaft B 86 is lowered while the inside of the cylinder is at a predetermined pressure. As a result, the lock shaft B 86 and the damper 85 come into contact with each other, and the damper 85 is locked so as not to rotate. On the other hand, when the inside of the cylinder falls below a predetermined pressure, the lock shaft B 86 is raised by the bias of the spring 86a and the lock shaft A 87 is lowered. Thereby, the lock | rock of the damper 85 is cancelled | released and the rotation is enabled.

  In the winding direction of the mainspring 26 (that is, the direction in which the valve to be controlled is opened), the gears 19a to 19c rotate, but the ratchet gear 81 does not rotate because the ratchet mechanism works, and the gear 82 is not transmitted. Therefore, the mainspring 26 can be rolled up even when the lock mechanism 24 is operating. On the other hand, the ratchet gear 81 rotates in the direction in which the wound spring 26 returns to the original state (that is, the direction in which the valve to be controlled is closed) because the ratchet gear 81 is rotatable. The rotation of the ratchet gear 81 at this time is transmitted to the damper 85 through the gear 82, the helical gear 83, and the screw gear 84 in order. With this configuration, all the gears do not rotate while the lock shaft B 86 is lowered to lock the damper 85 in a non-rotatable manner. For this reason, the mainspring 26 cannot be restored. That is, the power accumulated in the mainspring 26 is maintained. As described above, the lock shaft B 86 is controlled by the pressure in the air cylinder 22. Therefore, by remotely controlling the pressure in the air cylinder 22, it is possible to control whether the power stored in the wound spring 26 is held or released by controlling the movement of the lock shaft B86. it can. Note that the lock of the damper 85 can be released regardless of the pressure in the air cylinder 22 by manually pushing down the lock shaft A 87.

  As described above, the opening and closing of the controlled valve is controlled. The valve opening / closing device of the present invention is characterized in that a valve opening / closing state detecting means for detecting an opening / closing state of a valve to be controlled is provided. The open / closed state of the valve to be controlled is detected by reading the rotation state of the valve fitting portion 12 and / or the rotation state of the interlocking member interlocked with the valve fitting portion 12 through an optical fiber. As the interlocking member, gears 19a, 19b, 19c, 91, and the rotating shaft 20 are exemplified. The interlocking member is preferably a member that rotates in one rotation or less during a series of operations from opening to closing of the control target valve.

A method for reading the rotation state of the valve fitting portion 12 through the optical fiber will be described below.
A mark reading port 11 through which a mark (described later) applied to the outer peripheral surface of the valve fitting part 12 can be seen is formed at a position where the valve fitting part 12 of the housing 10 is located. One end of an optical fiber 13 is attached to the label reading port 11. The other end of the optical fiber 13 is connected to a sign reader (not shown). The sign reader (means for reading the valve open / closed state) optically reads the sign displayed on the outer periphery of the valve fitting part 12 displayed on the part corresponding to the sign reading port 11 through the optical fiber 13. The label reader includes a light source and a light receiving element. The amount of light irradiated from the light source and reflected by the sign is read by the light receiving element. The sign reader is configured to transmit a read signal to a control unit (not shown).

  FIG. 4 is an explanatory diagram for explaining a developed mark on the outer peripheral portion of the valve fitting portion 12. As shown in FIG. 5, this mark is attached along the outer peripheral portion of the valve fitting portion 12. Of the signs marked in two stages in FIG. 4, the upper stage is divided into two regions having different light reflectivities so as to be optically detectable. In FIG. 4, 50 is a black marker painted in black, and 51 is a white marker painted in white. The valve fitting portion 12 is directly or indirectly fitted to the rotation shaft of the control target valve and rotates together with the rotation shaft of the control target valve. Therefore, the open / close state of the valve to be controlled can be detected by detecting the rotation state of the valve fitting portion 12. The rotation state of the valve fitting portion 12 is detected by the above sign. Specifically, when the black marker 50 is located at a location corresponding to the marker reading port 11 in FIG. 1, the control target valve is in a closed state. Similarly, when the white marker 51 is positioned, the control target valve is in an open state. Note that the lower display is a display for a human to directly check the open / close state of the valve to be controlled, and is not essential in the present invention.

Next, an example of a method for reading the rotation state of the interlocking member interlocked with the valve fitting portion 12 through the optical fiber will be described below.
FIG. 8 is an explanatory diagram for explaining the signs attached to the interlocking member. The same components as those in FIG. 7 are denoted by the same reference numerals, and the description thereof is omitted. 91 is a gear that rotates on the same axis as the ratchet gear 81. The gear 91 is interlocked with the ratchet gear 81 by the rotation shaft 97. A dog 95 is attached to a part of the gear 91. This dog 95 has the same role as the above-mentioned label. That is, the opening / closing state of the valve to be controlled can be detected by disposing the mark reading port at a predetermined position and remotely detecting the presence or absence of the dog 95 at the mark reading port portion using an optical fiber.

  A plate-like stopper 93 is attached to the gear 91, and the stopper 93 is configured to rotate about the rotation shaft 97. The stopper 97 protrudes from the outer diameter of the gear 91. When the protruding portion reaches a predetermined position, the stopper 97 comes into contact with a housing or the like (not shown) to disable the rotation of the gear 91. That is, it is configured such that when the handle 14 is rotated, it cannot be further rotated at a predetermined position. Thereby, excessive rotation of the rotating shaft of the valve to be controlled is prevented. The dog 95 may be configured to have the same role as the stopper 93. That is, the dog 95 is arranged so as to protrude from the outer diameter of the gear 91, and when the protruding portion reaches a predetermined position, the dog 95 comes into contact with a housing (not shown) or the like to disable the rotation of the gear 91. May be.

  Next, the operation of the valve opening / closing device of the present invention will be described with reference to the drawings. FIG. 6 is an explanatory view showing a state in which the drive unit 18 of the valve opening / closing device 100 of the present invention is attached to a gas cylinder. In FIG. 6, reference numeral 60 denotes a gas cylinder, and a control target valve 61 is formed at the top of the gas cylinder. First, the valve fitting portion 12 is fitted to the control target valve 61. The casing 10 of the valve opening / closing device 100 is fixed to the gas cylinder 60 by the fixture 30 via the support column 32. Thereby, the valve fitting part 12 and the control object valve | bulb 61 rotate integrally by the same shaft center.

  When the control target valve 61 of the gas cylinder 60 is opened, the handle 14 is manually rotated in a predetermined direction. As a result, the mainspring 26 is wound up, the rotating shaft 20 and the valve fitting portion 12 rotate along the axis thereof, and the controlled valve 61 is opened (in the following description, the valve fitting portion 12 at this time is opened). ) Is also referred to as “A direction”, and the opposite direction is also referred to as “B direction”). The valve fitting portion 12 is urged in the B direction, that is, the direction in which the control target valve 61 is closed by the wound spring 26. At this time, the three-way electromagnetic valve 73 interposed in the driving gas supply pipe 17 is actuated by a control signal from the control unit 70, and the driving gas is sent into the air cylinder 22. After the air cylinder 22 reaches a predetermined pressure, the lock shaft B 86 is lowered by manually raising the lock shaft A 87. As a result, the damper 85 comes into contact with the lock shaft B 86 and is locked so as not to rotate. As a result, rotation of the valve fitting portion 12 and the rotating shaft 20 in the B direction is suppressed. While the air cylinder 22 is at a predetermined pressure, the state where the lock shaft B 86 is lowered is maintained. That is, while the air cylinder 22 is at a predetermined pressure, the control target valve 61 is kept open. At this time, the white marker 51 displayed on the outer periphery of the valve fitting portion 12 is displayed in the marker reading port 11 portion. This mark is read by the mark reader 52 through the optical fiber 13 and transmits a “valve open” signal to the control unit 70. The control unit 70 receives the “valve open” signal and turns on the indicator lamp 71 corresponding to “valve open”.

  When the control target valve 61 of the gas cylinder 60 is closed, the control unit 70 operates the three-way electromagnetic valve 73 to exhaust the driving gas in the air cylinder 22. As a result, the lock mechanism 24 is released. That is, the lock shaft B 86 is raised and the engagement of the damper 85 is released. Thereby, the power accumulated in the mainspring 26 is released, and the valve fitting portion 12 and the rotary shaft 20 rotate in the B direction. In this way, the control target valve 61 of the gas cylinder 60 is closed. At this time, the black marker 50 displayed on the outer peripheral portion of the valve fitting portion 12 is displayed in the marker reading port 11 portion. This mark is read by the mark reader 52 through the optical fiber 13 and transmits a “valve closed” signal to the control unit 70. The control unit 70 receives the “valve closed” signal and turns on the indicator lamp 72 corresponding to “valve closed”.

  As described above, the method for reading the mark attached to the outer peripheral portion of the valve fitting portion 12 using the optical fiber 13 has been described. The present invention is not limited to this, and a sign is attached to an interlocking member that is interlocked with the valve fitting portion 12, and the sign can be read using an optical fiber. This interlocking member is as described above. The sign reading port may be appropriately disposed according to the position of the interlocking member.

  As described above, the valve opening / closing apparatus 100 performs the opening / closing operation of the control target valve 61, and the actual opening / closing state of the control target valve 61 is transmitted to the control unit 70. Accordingly, the state of the control target valve can be grasped without a person directly viewing the control target valve.

  Since the valve opening / closing device 100 does not have a current-carrying portion in the drive portion 18, it can be used even in a flammable atmosphere.

  The three-way solenoid valve 73 is preferably configured to exhaust the driving gas in the air cylinder 22 when not energized. Thereby, a control object valve can be closed automatically at the time of a power failure. In this case, in order to be able to confirm the state of the control target valve 61 even in the event of a power failure, the sign reader 52 may be provided with a spare power source or the like. The valve opening and closing device of the present invention can be configured to connect a known earthquake sensor, gas sensor, fire sensor, etc., and to close the valve to be controlled in the event of an earthquake, gas leak, or fire.

  In the above description, the valve opening / closing apparatus 100 is configured to perform the operation of opening the valve by manually rotating the handle 14 and performing the operation of closing the valve by remote control. You may comprise so that it may carry out by remote control.

  In the above description, the mainspring 26 is used as the power storage unit. However, the power storage unit is not limited thereto, and air pressure, hydraulic pressure, various elastic bodies, and the like may be configured as the power storage unit.

  The label read using the optical fiber is not limited to the white label and the black label described above, and any label may be used as long as it has a different reflectance. For example, you may comprise a part of member with the material from which a reflectance differs. In addition, grooves or uneven portions can be formed on various gears or the like to be used as signs.

  In the above description, the marker reader 52 and the three-way solenoid valve 73 are installed separately from the control unit 70, but the present invention is not limited thereto, and may be incorporated in the control unit 70. The control unit 70 may be installed anywhere, but when the drive unit 18 is used in a flammable atmosphere, it is preferably installed outside the flammable atmosphere. Alternatively, it is preferable that the control unit 70 has an explosion-proof structure. The control unit 70 may be provided with an indicator lamp for notifying abnormality when the control target valve does not operate as intended.

  The length of the optical fiber 13 is not particularly limited, but is generally 1 to 100 m, and preferably 2 to 50 m.

  In the above description, the control unit 70 controls only one valve opening / closing device. However, the present invention is not limited to this, and a plurality of valve opening / closing devices can also be controlled.

  In the above description, the valve opening / closing device 100 is directly fixed to the gas cylinder 60. However, the present invention is not limited to this, and the gas cylinder 60 and the valve opening / closing device 100 may be fixed to a wall or a column, respectively. Moreover, in the said description, although the valve opening / closing apparatus 100 was applied to the valve 61 of the gas cylinder 60, it is not restricted to this but can also be applied to the gate valve interposed by various piping. In that case, the fixing tool 30 and the support column 32 may be appropriately changed in design and fixed near the valve body of the gate valve.

DESCRIPTION OF SYMBOLS 100 ... Valve opening / closing apparatus 10 ... Housing 11 ... Mark reading port 12 ... Valve fitting part 13 ... Optical fiber 14 ... Handle 16 ... Gas supply port for driving 17 ... -Gas supply pipe for drive 18 ... Drive part 19a, 19b, 19c ... Gear 20 ... Rotating shaft 22 ... Air cylinder 24 ... Lock mechanism 26 ... Spring spring 30 ... Fixing tool 32 ... Stand 50 ... Black label 51 ... White label 52 ... Label reader 60 ... Gas cylinder 61 ... Control target valve 70 ... Control unit 71 ... Indicator light 72. .. Indicator light 73 ... Three-way solenoid valve 81 ... Ratchet gear 82 ... Gear 83 ... Helical gear 84 ... Screw gear 85 ... Damper 86 ... Lock shaft B
86a ... Spring 87 ... Lock shaft A
91 ... Gear 93 ... Stopper 95 ... Dog 97 ... Rotating shaft 99 ... Gear

Claims (8)

A valve opening and closing device that opens and closes the control target valve by rotating a rotation shaft of the control target valve;
A valve fitting portion that is directly or indirectly fitted to the rotary shaft of the valve to be controlled and is rotatable about the same axis as the rotary shaft;
A power storage unit that stores power for rotating the valve fitting unit in a direction in which the valve to be controlled is closed;
A handle portion that accumulates power in the power accumulation portion and rotates the valve fitting portion in a direction in which the valve to be controlled opens.
A switching unit that switches between holding and releasing the power stored in the power storage unit;
A control unit that controls opening and closing of the valve to be controlled by switching the switching unit;
Comprising
A valve opening / closing state detecting means for detecting an opening / closing state of the valve to be controlled by reading through a fiber optic the rotation state of the valve fitting portion and / or the rotation state of the interlocking member interlocking with the valve fitting portion. A valve opening and closing device characterized by that.   The valve opening and closing device according to claim 1, wherein an optical mark is attached to the interlocking member.   The valve opening / closing apparatus according to claim 1, wherein a dog is connected to the interlocking member.   The valve opening / closing apparatus according to claim 3, wherein the dog has a function of preventing excessive rotation of the rotation shaft of the valve to be controlled.   The valve opening / closing apparatus according to any one of claims 1 to 4, wherein the interlocking member is a gear.   The valve opening and closing device according to claim 1, wherein an optical mark is attached to an outer peripheral portion of the valve fitting portion.   The valve opening / closing device according to claim 1, wherein the power storage unit is a spring spring wound around a direction parallel to the axis of the valve fitting unit.   The valve opening / closing apparatus according to claim 1, further comprising a display unit for displaying an opening / closing state of the control target valve read by the valve opening / closing state confirmation unit.

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