WO2007135721A1

WO2007135721A1 - Valve drive device

Info

Publication number: WO2007135721A1
Application number: PCT/JP2006/310065
Authority: WO
Inventors: Jiro Kamezawa
Original assignee: Tomoe Technical Research Company Ltd.
Priority date: 2006-05-19
Filing date: 2006-05-19
Publication date: 2007-11-29
Also published as: JP4245188B2; TW200804703A; CN101443587A; CN101443587B; TWI323327B; JPWO2007135721A1

Abstract

[PROBLEMS] To provide a valve drive device formed so that an automization mechanism can be detachably installed in a manual valve drive mechanism without changing the inner structure of the valve drive mechanism and capable of driving a valve either manually and automatically by transmitting a drive force by the drive force generating means of the automization mechanism to the manual valve drive mechanism, and enabling the removal of the installed automization mechanism as required. [MEANS FOR SOLVING PROBLEMS] The manual valve drive mechanism comprises a handle manually imparting a rotating power, a drive shaft rotatablyfitted to a casing and transmitting the rotating power produced by the handle to a drive force transmission mechanism disposed in the casing, and a valve stem connection body for transmitting the drive force transmitted thereto through the drive force transmission mechanism to a valve stem forming the rotating shaft of the valve. The valve drive mechanism is characterized in that the drive force generating means is detachably fitted to one outer part of the casing, the drive force generating means is connected to the drive shaft through a power transmission means, and a drive force by the drive force generating means is transmitted to the valve stem without changing the manual valve drive mechanism so that the valve can be opened and closed.

Description

Specification

Valve drive device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a valve driving device for applying a driving force to a valve rod of a valve device configured to open and close a valve rod by rotating the valve rod, such as a butterfly valve and a ball valve. In particular, the present invention relates to a valve drive device that can switch the drive of a valve between manual and automatic.

Background art

[0002] Valve driving methods in valve devices such as butterfly valves are roughly divided into two methods: manual and automatic. In recent years, the demand for automatic devices or valve drive actuators that can be remotely operated and centrally managed has been increasing and the importance has been increasing with the automation and new installation of plants and devices. Automation of plants, equipment, etc. requires the safety of the equipment itself, ease of maintenance, etc., as well as manual operation on the machine side in the event of an emergency, inspection after maintenance, confirmation, and trial operation.

[0003] In order to satisfy the above requirements, it is necessary for an automatic valve device to drive a valve mainly electrically, and to drive it manually as needed. In the past, various automatic Z-manual switching devices have been proposed. However, all of them have problems such as complicated structure, short lifespan, and complicated operation.

[0004] For the purpose of solving such problems, the applicant of the present application has previously proposed the technique described in Patent Document 1. According to the device disclosed in this Patent Document 1, it is possible to drive both automatically and manually with a single actuator, so that manual operation can be performed while the electric operation is reliably shut off during manual operation. It is excellent in that it can ensure the safety of manual workers. However, in the case of a valve drive device having a structure having both a manual mechanism and an automatic mechanism, it is expensive to use where only the manual method is required, and there is a waste of excessive functions. It will be. In fact, depending on the plant and equipment, the specific location In this case, a manual type valve drive device that requires only a manual mechanism that does not have an automatic mechanism is required. Is done.

In other words, nowadays, the automation of plants and devices has progressed, and the demand for automatic valve devices has increased! /. Needless to say, the need for manual valve devices to accompany this Is also getting higher and there is a demand for both.

[0006] In general, when automating or newly establishing a plant or equipment, the power to place orders for manual and automatic actuators according to the quantity designed in advance. May be required to change the required quantity. In such a case, it is an accessory that the surplus product is produced. In addition, if it is necessary to replace the mounting position of the manual device with the mounting position of the automatic device after mounting the various actuators, remove all of the automatic and manual devices, and then re-install and adjust them. There is a problem that I have to work!

Patent Document 1: Japanese Patent No. 2787402

Disclosure of the invention

Problems to be solved by the invention

[0007] According to the present invention, an automatic mechanism can be detachably assembled to the valve drive mechanism without changing the internal structure of the manual valve drive mechanism, and the drive by the drive force generating means of the automatic mechanism Force can be transmitted to the manual valve drive mechanism so that the valve can be driven either manually or automatically, and the assembled automatic mechanism can be removed as necessary. It is intended to provide a valve driving device. Means for solving the problem

[0008] Means taken by the present invention to solve the above-described problems include a handle that manually applies rotational power, and a rotational power that is rotatably attached to the casing and is provided by the handle. A driving shaft that transmits to a driving force transmission mechanism disposed in the casing, and a valve rod coupling body that transmits the driving force transmitted through the driving force transmission mechanism to a valve rod that forms a rotary shaft of the valve. A manual drive type valve drive mechanism having a drive force generating means detachably attached to an outer side portion of the casing; And the drive shaft are connected via a power transmission means, and the valve can be opened and closed by transmitting the drive force generated by the drive force generation means to the valve rod without changing the manual valve drive mechanism. It is characterized by that.

[0009] The driving force generation means is unitized by being incorporated in one housing together with power transmission means for transmitting the driving force to the drive shaft, and the unitized electric motor driving means is the manual drive system. It is characterized in that it can be transformed into a drive device for both a manual drive system and an electric drive system by detachably attaching to one outer surface of the casing.

[0010] The drive shaft and the power transmission means of the driving force generating means are detachably connected by a key means.

[0011] The driving force generating means is an electric motor, and the power transmission means is a deceleration transmission mechanism.

[0012] An opening degree display device capable of visually recognizing the opening degree of the valve in conjunction with the rotation angle of the valve rod assembly is provided outside the casing.

[0013] The opening degree detection means is attached outside the basic unit, and the opening degree detection means force is also output. Based on the valve opening / closing position signal, the automatic driving force generation means is controlled to open and close the valve. It is characterized by.

The invention's effect

[0014] According to the present invention, the manual drive type valve drive mechanism is used as a basic unit, and the additional unit is independently provided from the basic unit so that the driving force generated by the driving force generating means can be transmitted to the basic unit. The additional unit can be detachably assembled to the basic unit without changing the internal configuration.

Thus, for example, in the case of changing from a manual device to an automatic device in the past, it is necessary to purchase an automatic device, remove an old device, and install a new device. According to the present invention, by attaching an additional unit, which is an automatic drive mechanism, the manual device is converted into an automatic device at a much lower cost of introduction. There is an effect that can be. Mounting the additional unit to the basic unit does not require any changes to the internal configuration, so it has been very laborious in the past. There is an effect that the adjustment of the fully closed position or the fully open position is unnecessary. In addition, when manual operation becomes necessary from the automated state, it is possible to easily remove only the additional unit, and adjustment after removal is unnecessary, so that switching work can be greatly reduced. .

Further, the valve opening degree is detected by the valve opening degree detection mechanism, and the automatic driving mechanism is controlled by the signal that detects the opening degree so that the valve is opened and closed. Display, confirmation or valve opening / closing operation can be performed remotely.

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] A preferred embodiment of the present invention will be described in detail below. Referring to Figs. 1 to 4, (1) is a basic unit, (2) is an additional unit added to the basic unit as needed, and an additional unit must be added to the basic unit. Thus, the manual drive mechanism can be changed to an automatic drive mechanism. The basic unit (1) is rotatably supported in the casing (3), one end of which extends outside the casing (3), and a drive shaft (4) that is linked to the drive shaft (4) from the outside. Is provided with a driving force transmission mechanism (5) that transmits the driving force to the valve stem coupling body (6). An operation handle (7) for applying power by manual operation is detachably attached to the tip of the drive shaft (4) extending outward from the casing (3). The drive shaft (4) is provided with a keyhole (8) outside the casing (3), and a gear (9) for transmitting the power from the additional unit (2) to the drive shaft (6) is keyed. (10) can be connected, and when the automatic mechanism is unnecessary, the key (10) and the gear (9) can be disconnected to easily remove the automatic mechanism. It is.

[0018] The drive force transmission mechanism (5) includes a traveler nut (12) that is screwed into the screw (11) of the drive shaft (4) and moves in the axial direction of the drive shaft, and the traveler nut (12) The link arm (13) is connected to the valve stem coupling body (6), and the traveler nut (12) is rotated by the rotation of the drive shaft (4). The valve stem coupling body (6) is rotated via the link arm (13). The valve stem is connected to the valve stem coupling body (6) in the direction of rotation, and the valve is opened and closed by the rotation of the valve stem.

[0019] The drive force transmission mechanism (5) disposed in the casing (3) converts the drive force applied to the drive shaft (4) by the manual drive force of an external force into the casing (3). Transmit to valve stem connector (6) Any desired driving force transmission mechanism can be employed as long as it is configured to be able to do so, and not limited to the traveler nut and link arm. For example, a worm gear mechanism that converts the rotational direction of the drive shaft (4) and transmits it to the valve stem coupling body (6) by a worm fixed to a predetermined portion of the drive shaft (4) and a worm wheel meshed therewith is adopted. May be used. In addition, a traveler nut is screwed onto the screw of the drive shaft (6), and a skater choke is interlocked with the traveler nut to transmit the rotational power of the drive shaft (4) to the valve stem connector (6). It is okay to use a touch yoke mechanism.

[0020] A valve closing side regulating body (14) and a valve opening side regulating body (15) for restricting the rotation angle are fixed to the valve stem coupling body (6), and the external force of the casing (3) also protrudes. Opening and closing of the valve is regulated by abutting either the closing stopper (16) with adjustable length or the valve opening stopper (17) formed in the casing (3). . In Fig. 2, the solid line represents the closed state, and the two-dot chain line represents the valve open state. The opening of the valve is displayed by an opening display device (18) disposed on the outer surface of the casing (3) so that it can be seen from the outside of the casing (3). I can do it. This opening degree display device may be an opening degree detection means as described later, and may output an electrical or pneumatic opening degree signal. The valve stem coupling body (6) includes a cylindrical body (19) that is rotatably mounted on the casing (3) substantially perpendicularly to the drive shaft (4), and the center of the cylindrical body (19) is connected to the valve stem. A connecting hole (20) is formed, and the tip of the valve stem is engaged to connect the valve stem to the cylindrical body integrally in the rotational direction. Here, the connecting hole (20) in the figure is a square hole, but it is of course not limited thereto.

[0021] The additional unit (2) includes the gear (9) incorporated in a substantially L-shaped rectangular box-shaped motor housing (21) and a driving force applied to the gear (9). An electric motor (22) and a reduction transmission mechanism (23) for transmitting the electric motor (22) to the gear (9) while reducing the rotation of the electric motor (22) are provided. The deceleration transmission mechanism (23) also has a combination force of a plurality of gears as conventionally known, and transmits the rotation of the electric motor (22) while decelerating. The motor housing (21) has a motor housing portion (24) and a gear housing portion (25) formed so that the force of the motor housing portion (24) also protrudes in an L shape, and has a substantially L-shaped box shape as a whole. Is formed.

[0022] A spring pin mounting hole (26) is formed at a predetermined location on the outer surface of the gear housing (25). Insert the spring pin (28) to be inserted into the spring pin fitting hole (27) of the casing (3) of this unit (1) and connect the basic unit (1) and the additional unit (2) in a detachable manner. Can be done. To fix the additional unit to the basic unit, secure the additional unit (2) to the retaining plate (29) fixed to the basic unit (1) with screws (30) on the opposite side of the spring pin (28). .

[0023] In the illustrated embodiment, the driving force generating means incorporated in the additional unit (2) employs the electric motor (22), but another form of driving force generating means such as air drive is used. Depending on the driving force generating means force, the transmission mechanism of the driving force to the drive shaft (6) of the basic unit (1) can be configured differently, of course.

[0024] Fig. 5 ~: LO shows a modification of the present invention. Instead of the opening indication device (18) of Figs. 1 and 2, the opening detection device (31) is a basic unit. Attached to the outer surface of the casing (3) of (1), detects the rotation angle of the valve stem coupling body, i.e., the valve stem, outputs the valve opening signal, and outputs the valve opening signal based on the output opening signal. The operation of the driving force generating means is controlled. The opening degree detection device (31) is not particularly limited as long as it outputs an electrical signal, an aerial signal, or any other desired signal. The valve opening detection device detects the valve opening, controls the automatic drive mechanism based on the opening signal, and opens and closes the valve to display and check the opening / closing state of the valve, or to open and close the valve. Can be done remotely.

Referring to FIGS. 5 to 10, the opening degree detection device (31) includes a substantially rectangular box-shaped casing (32), and an output shaft (33) extending in the longitudinal direction in the casing (32). It is pivotally supported. The output shaft (33) is coupled to the valve stem coupling body (6) in the direction of rotation. Two limit cams (34) on the closing side and the valve opening side are fixed to the output shaft (33), and the limit switch (35) on the closing side and the valve opening side operated by the cam is connected to the casing (32 ) And the limit cam (34) operates the limit switch (35) by the rotation of the output shaft (33) that rotates integrally with the valve stem, and outputs a valve open / close signal. . The output signal is displayed on the opening display panel touching the remote location, and the valve opening can be confirmed at the remote location. Furthermore, it is possible to remotely operate the valve by operating the valve operation panel to control the operation of the automatic driving force generating mechanism.

[0026] An indicator (36) is attached to the outer end of the output shaft (33) extending to the outside of the casing (32). It is attached so that the valve opening of the position force close to the valve device can be visually confirmed. As shown in FIG. 9, the casing (32) is fixed by a connection pin (37) such as a spring pin and a screw (39) that are attached between the casing (3) of the basic unit (1). The connecting plate (38) is connected to the casing (3).

Brief Description of Drawings

[0027] [Fig.1] External view of basic unit and additional unit connected

[Figure 2] Cross section of basic unit and additional unit connected

[Figure 3] External perspective view of basic unit

[Fig. 4] External perspective view showing the rear cover removed.

[Fig.5] —Plan view showing deformation

[Figure 6] Side view of the deformation

[Figure 7] External perspective view of the same deformation

[Fig.8] Exploded perspective view of the same deformation

[Fig. 9] A cross-sectional view of a part of the opening detection device for the deformation

[Fig.10] Cross-sectional view of the opening detection device in the same direction as Fig. 9

Explanation of symbols

[0028] 1 Basic unit

2 Additional unit

3 Casing

4 Drive shaft

5 Driving force transmission mechanism

6 Valve stem connector

7 Handle

8 Key Honore

9 troubled car

10 key

11 Screw

12 卜 Labeler Natsu 卜 Link arm Valve closing side regulating body Valve opening side regulating body Closing side stopper Valve opening side stopper Opening indicator Cylindrical body

Connecting hole

Motor housing Electric motor Deceleration transmission mechanism Motor housing part Gear housing part Spring pin mounting spring spring pin fitting: spring spring pin retaining plate

Screw

Opening detection device Casing Output shaft

Limit cam

Limit switch indicator Connection pin

Connecting plate

Screw

Claims

The scope of the claims

[1] A handle that manually applies rotational power, a drive shaft that is rotatably attached to the casing, and that transmits rotational power provided by the handle to a driving force transmission mechanism disposed in the casing; A valve drive mechanism of a manual drive system having a valve stem coupling body for transmitting a drive force transmitted through the drive force transmission mechanism to a valve stem that forms a rotary shaft of the valve, wherein A driving force generating means is detachably attached to the part, the driving force generating means and the drive shaft are connected via a power transmission means, and the driving force generating mechanism is changed without any change in the manual valve driving mechanism. A valve driving device characterized in that the driving force generated by the generating means is transmitted to a valve rod so that the valve can be opened and closed.

[2] The driving force generation means is united together with the power transmission means for transmitting the driving force to the drive shaft and unitized, and the unitized electric motor driving means is manually driven. The valve drive device according to claim 1, wherein the valve drive device can be transformed into a drive device for both a manual drive method and an electric drive method by being detachably attached to one outer surface of the casing of the method.

[3] The valve drive device according to claim 1 or 2, wherein the drive shaft and the power transmission means of the drive force generating means are detachably connected by a key means.

4. The valve drive device according to any one of claims 1 to 3, wherein the driving force generating means is an electric motor, and the power transmission means is a deceleration transmission mechanism.

[5] The opening degree display device capable of visually recognizing the opening degree of the valve in conjunction with the rotation angle of the valve rod assembly is provided outside the casing. The valve drive device described.

[6] An opening degree detecting means is attached outside the basic unit, and the opening degree detecting means force is also output. The automatic driving force generating means is controlled by the valve opening / closing position signal to open and close the valve. The valve drive device according to claim 1, wherein: