JP2012149748A - Human error eliminating emergent valve responding to emergent time carrying out expected opening/closing despite handle operation error and error eliminating mechanism of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human error preventing valve in which the valve is properly operated as a result even though a person erroneously operates a valve during emergent time such as earthquake, fire, lifesaving, and the mechanism of the same.SOLUTION: A handle and a shaft of a valve are integrally formed and the valve is directly moved by the shaft up to now. Consequently, it is sometimes experienced that the valve is erroneously moved in a reverse direction even though opening/closing is shown during emergent time. A handle shaft and a valve shaft are arranged in the valve, two gears are arranged in the handle shaft and the two gears are arranged in the valve shaft, the power transmitting system of the handle shaft is constituted of two systems, one-way clutches are arranged between the two gears of the handle shaft and the shaft such that the locking directions are different, and an one-way clutch is arranged between the valve shaft gear and the shaft, thereby two-way rotation input is changed to one-way rotation input, consequently erroneous operation does not cause secondary disaster.

Description

  The present invention is a human error removing emergency valve that opens or closes in the event of an emergency operation such as an earthquake, a fire, a factory disaster, etc., even when a handle is accidentally operated when shutting or opening harmful gases or liquids. It relates to the error removal mechanism.

In the event of an emergency such as an earthquake, fire, or explosion, utilities such as power and air pressure are cut off, and the plant valves must be manually opened and closed.
On the other hand, the current large-sized manual valve and the small-sized manual valve have a fixed valve handle rotation direction when the valve is opened and closed, and the handle rotation direction may be mistaken in the event of an emergency.
Then, hurry up and turn it back in the normal direction, but it has been found from a number of accident cases that this is not in time. In addition, as a result of prior art investigations, Patent Document 1 and Patent Document 2 show systems that prevent human errors electrically or in sequence, but these are normal human error prevention systems that use electric power and other air pressure. If the infrastructure is destroyed, it cannot be handled. Thus, there is no valve of the present invention that accepts an operation error of the manual valve.

Patent Publication 2004-144898 Patent Publication No. 11-264892

Accidents at oil plants, chemical factories, nuclear facilities, etc. can be fires, violent poisoning, radiation exposure, etc. Even if the electrical system has failed, other utilities such as air pressure are not usable. However, no matter how much hesitated, the time allowed for manual valve operation is very small, and if the intended purpose is not achieved even if operated incorrectly, a serious secondary disaster cannot be avoided. .
In view of such a situation, the present invention corrects inside the valve even if the manual handle of the emergency shutoff valve or emergency release valve that prevents secondary disasters is rotated forward or backward, and performs the expected operation of the emergency valve. A special valve is provided.
A further object of the present invention is to provide a machine device for an industrial machine in which the output shaft is always forwardly or reversely rotated even if the input shaft is forwardly or reversely rotated.

In the conventional valve, as shown in FIG. 1, an operation handle shaft and a valve opening / closing shaft are integrally formed, and opening / closing of the handle and opening / closing of the valve are in the same direction. Therefore, when the emergency handle should be turned in the closing direction, if it is accidentally turned in the opening direction, the valve will be fully opened, which may lead to an increased accident. In order to solve this problem, if the handle shaft and the valve shaft are separated, and a mechanism is provided in which the valve shaft rotates only in one direction, either forward or reverse, even if the handle rotates in the forward or reverse direction, a human error will occur. Removal is possible.
In addition, when the rotation position of the rotating body must always be constant when rotating a few dozen times, if the rotation drive is performed with a rack or pinion of an air cylinder or hydraulic cylinder, the stroke will be constant, so stop The position can be always constant. However, even at this time, even if the piston rod reciprocates, a mechanism that always keeps the rotational direction constant is necessary.
As a means for solving the above problems, if a mechanism that can only perform one type of forward or reverse movement of the output shaft even if the input shaft rotates forward or backward with a combination of a mechanical one-way clutch can be realized Can be achieved.

  In order to achieve the above, it is possible to devise a combination of the mechanical one-way clutch.

The present invention solves the above problems and achieves the intended purpose.
The operation principle of the present invention will be described in detail with reference to FIGS. 2, 3, 4, 5, and 6. FIG. 2 is a cross-sectional view of an embodiment illustrating the basic operation principle of the present invention, FIG. 3 is a DD view of FIG. 2, FIG. 4 is a view of FIG. 2A, and FIG. 6 and 6 are C views of FIG.

First, the structure will be described with reference to FIG.
The valve body 4 is provided with a chamber 4d in which an error removal mechanism is built. An operation shaft 6 of the handle 2 is provided with a one-way clutch 11 between the gear 5 and the shaft 6 and a one-way clutch 12 between the gear 10 and the shaft 6.
The shaft 6 is supported by bearings 4e provided at both ends of the shaft 6. Reference numeral 9 denotes a split spacer of the gears 5 and 10.
7 is a valve opening / closing shaft directly connected to 7a and provided with a shaft 7b on the other side. The shaft 7 is supported by a bearing 4 e in the same manner as the shaft 6. The gear 15 is engaged with the gear 5 and a one-way clutch 17 is provided between the gear 15 and the shaft 7. The gear 16 is integrated with the gear 14 and is engaged with a gear 13 that is rotatable on the shaft 8. Further, the gear 13 is engaged with the gear 10. Reference numeral 14 denotes a spacer.

Next, the basic principle of operation will be described with reference to FIGS. 3, 4, 5, and 6. FIG.
This is an example in which the valve 7a rotates in the e direction regardless of whether the handle is rotated in the d direction or the c direction.
First, three one-way clutches are attached as shown in FIGS. That is, in FIG. 4, when the shaft 6 is rotated in the d direction, the clutch ball 55a moves toward the wedge 55, the ball 55a is fitted between the shaft 6 and the wedge 55, and the outer peripheral gear 5 is rotated in the h direction. At this time, in the other clutch 12, the ball 55a moves away from the wedge 56, and the movement of the shaft 6 is not transmitted to the gear 10. On the other hand, the rotation of the gear 5 is transmitted to the shaft 7 in FIG. That is, when the gear 16 is rotated in the i direction by the gear 5, the ball 55a of the one-way clutch 17 is fitted between the wedge 55 and the shaft 7, and the shaft 7 rotates in the c direction. As a result, when the handle 2 turns in the d direction, the valve 7a connected to the shaft 7 rotates in the e direction opposite to the handle. At this time, the rotation of the gears 15 and 16 in the i direction rotates the gear 10 in the i direction via the intermediate gear 13. Then, because of the same one-way clutch function, the i-direction rotation of the gear 10 does not act on the shaft 6, and the gear 10 simply turns idle. On the other hand, when the handle 2 is turned in the direction c, the clutch 11 is idled and the clutch 12 is operated. From FIG. 5, the rotation of the shaft 6 in the c direction rotates the gear 10 in the i direction by the action of the ball 56. When the gear 10 rotates in the i direction, this rotation causes the gear 16 to rotate in the i direction via the intermediate gear 13. Then, the shaft 7 rotates in the direction c by the action of the ball 55a. As a result, the valve 7a rotates in the e direction. When the gear 16 rotates in the i direction, the gear 5 engaged therewith rotates in the h direction, but the gear 5 does not rotate due to the action of the one-way clutch 11.

  As described above, according to the first aspect of the present invention, the mechanism can be constituted by the combination of the mechanical one-way clutch, and the apparatus can be made compact.

  Further, according to the invention of claim 2, since the valve opening or closing in an emergency is determined by the one-way clutch lock direction on the output shaft, the valve or mechanism can be formed only by the direction in which the clutch is attached. The parts are the same, facilitating production.

It is sectional drawing which shows an example of a prior art example valve | bulb. It is sectional drawing of one Example explaining this invention. It is DD sectional drawing explaining this invention. It is A view explaining the present invention. It is a B view explaining the present invention. It is C view explaining this invention. It is one Example which applied this invention to the other valve | bulb. It is one Example which applied this invention to the other mechanism.

2 is a cross-sectional view showing an embodiment when the present invention is applied to a large-diameter butterfly valve. FIG. 3 is a cross-sectional view taken along the line DD of FIG. 2, and FIGS. 4, 5, and 6 are functions of a one-way clutch. FIG.
6 is an input shaft, and 7 is an output shaft. In the one-way clutch of the gear 5, when the shaft 6 rotates in the d direction, the gear 5 rotates in the h direction, that is, in the same direction as the handle, and the gear 15 engaged therewith rotates in the j direction. As a result, the valve 7a rotates in the e direction. On the other hand, the gear 10 is idled by the one-way clutch 12 and power is not transmitted to the shaft 7. When the handle 2 is turned in the direction c, the gear 5 is idled, the gear 10 is rotated in the direction i by the action of the one-way clutch 12, the gear 16 is turned in the direction i through the gear 13, and the valve 7a is turned in the direction e. Turn to. As a result, even if the handle 5 is rotated forward or backward, the shaft 7 rotates in the same e direction, so that the valve rotates in the e direction regardless of the rotation direction of the handle 2 and the valve is closed. On the other hand, when the locking direction of the one-way clutch 17 is reversed, forward / reverse rotation of the handle 5 similarly turns the valve e in the f direction.

  As a result, if the attachment positions of the one-way clutches 11, 12, and 17 are set as shown in FIG. 2, the valve e can be rotated forward or backward regardless of the rotation direction of the handle.

FIG. 7 shows an embodiment in which this function is added to a normal small poppet type valve. Here, the difference from the second embodiment is only that the poppet 28 is moved up and down by a female screw provided on the cover 32b and a male screw 28c provided on the shaft 28d. The butterfly valve 7c and the poppet valve 28d are pivoting portions that return the valve to the original position after the emergency opening and closing. In addition, the valve shaft, the one-way clutch type and arrangement position are exactly the same as in FIG. 2, and the functions are also the same.

FIG. 8 shows an embodiment applied to another industrial machine.
First, the structure will be described. Reference numeral 40 denotes a part that is washed and dried after machining. Here, the cleaning process will be described. The part has a protrusion 40a and must always be on the x-axis when rotation is stopped. Further, when the air is blown in the close contact direction of the component so that the drying is counter to the rotation direction of the component, the attached liquid is removed.
At this time, in order to keep the rotational speed of several tens of times constant at all times, the rotational speed becomes mechanically constant when an air cylinder or a hydraulic cylinder whose stroke is mechanically constant is used. That is, the position of the cylinder 42 is fixed, the movement of the piston 42b moves the piston rod 42a left and right e and f, and the rack 44 is connected by the metal fitting 43, and the movement of the rack 44 rotates the pinion 45. The pinion 45 rotates in the forward and reverse directions by the reciprocating motion. Here, the mechanism 46 always outputs the forward / reverse rotation of the input 46a as a one-way rotation to the output shaft 46b. Reference numeral 41 denotes a parts cradle, 47 denotes an air distributor, and 48 denotes blown air.

  From the above, the mechanism for always rotating the forward / reverse rotation in one direction can be applied to other industrial machines.

1, 4: Valve 2: Handle 3: Stopper 6: Input shaft 7: Output shaft 7a: Valve 5, 10, 13, 15, 16: Gear 11, 12, 17: One-way clutch 40: Parts 46: Input two-way Output one-way mechanism

Claims (2)

  An input shaft and a drive shaft are provided in parallel, at least two gears are provided on the input shaft, two gears integrated with the output shaft are provided, and two power transmission systems are provided. An emergency human error removal emergency valve and its error removal mechanism that opens and closes in the event of a handle operation error, and is provided with a one-way clutch between the input / output shaft gear and the input / output shaft.   The two one-way clutches on the input shaft are provided so that the clutch locking directions are opposite to each other, and the clutch on the output shaft is provided so as to lock the valve in the valve opening or closing direction, Emergency valve for emergency error response and its error removal mechanism that opens and closes in the event of a handle operation error.