JP4099251B2 - Actuator device for valve drive incorporating terminal unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a valve drive actuator device incorporating a terminal unit that relays connection of electrical parts that drive and control valves such as water gates, sluice gates, and the like that control the flow of fluid in channels such as waterways, water purification plants, and power plants. .
[0002]
[Prior art]
At present, valve drive actuator devices installed in the flow paths of various plants such as water purification plants and power plants are suitable for centralized information systems that are controlled using a controller from manual operations. The valve drive actuator device that performs diagnosis of the valve drive actuator itself by transferring data to a higher-level computer requires a large amount of equipment, and if there is an abnormality in the valve drive actuator, it must be inspected and repaired at the site. In addition, the repair and inspection work is expensive, and maintenance costs are increased, which is undesirable. In general, the valve controller itself has almost no check function, and the user is currently going to the place where the valve drive actuator is installed and conducting regular inspections, and the inspection itself is inaccurate. In addition, there is a problem that the inspection cost increases.
[0003]
Therefore, in a valve drive actuator device, the processing of all control by the central information system makes the device large and has a complicated structure. A system for processing was adopted. In the valve drive actuator device, the basic information for the flow path control is the opening, flow rate, flow rate, etc. of various gates and valves provided in the flow path. Many types of electric valve drive actuator devices are known as drive means for controlling the adjustment. (For example, refer to JP-A-62-292978 and JP-A-64-49778). Further, in order to control the valve drive actuator device by a controller, there are known devices using various control devices such as a torque switch and a limit switch (for example, Japanese Patent Laid-Open No. 64-79407, Japanese Utility Model Publication No. 5-37373). No. Publication, Japanese Utility Model Publication No. 6-35343).
[0004]
By the way, conventional actuators for driving a valve incorporate many electrical components such as sensors and control devices for driving the opening and closing of the valves. These electrical components are temporarily attached to a terminal unit provided inside. Wired and connected from the terminal unit to various sensors such as a flow sensor, central controller, built-in controller, and power supply.
[0005]
[Problems to be solved by the invention]
However, most of the conventional terminal units incorporated in the valve drive actuator device are provided with terminals arranged in a plane on the terminal block, and the terminal block itself increases as the number of terminals increases. There is a problem that the valve drive actuator device itself becomes large. If there are a large number of terminals, the wiring between various electrical components and the terminals of the terminal unit will increase in crossover wiring, making the wiring itself difficult, and in some cases, incorrect wiring. I did. In particular, in various valve drive actuator devices, different types of built-in electric parts or electric parts may be added, and the wiring may be changed each time, or a large number of crossover wiring may be added. There was a problem that the sex deteriorated. In addition, in order to avoid the crossover wiring between the electric parts and the terminals of the terminal unit, there is a problem that it is necessary to cope with the change of the terminal unit terminals and the arrangement of the electric parts.
[0006]
In addition, the valve drive actuator device described above has an arithmetic circuit, that is, an operation controller inside the valve drive actuator device to enable distributed processing, and can bear a part of the control system, which is extremely simple and accurate. In addition, the valve opening / closing time, that is, the valve opening / closing speed and the like can be set automatically and automatically controlled. However, various control devices such as terminal units, torque switches, limit switches, and indicating devices built into the valve drive actuator device are housed in separate cases. The terminal unit becomes larger due to the increase in electrical parts, and the device itself must be larger, and the valve drive actuator device cannot be made compact. .
[0007]
[Means for Solving the Problems]
An object of the present invention is to solve the above-mentioned problem, and as a terminal unit, a relay board printed on the terminal block is provided and can be replaced with another relay board according to the increase or decrease of electrical parts, The terminal unit is incorporated in the valve drive actuator to easily and quickly change the wiring connection, simplify the wiring itself to improve the assembly work of the wiring, etc., and prevent explosion-proof electrical components for control operation Collectively housed in cases with waterproof covers, abolished housing in each individual case as before, reduced the number of parts of the equipment itself, made the equipment itself compact, And an actuator device for driving a valve in which the connection between the terminal unit and the terminal unit adjacent thereto is simply configured.
[0008]
The present invention includes a spindle provided with a valve for adjusting the opening and closing of a flow path, a rotary shaft rotatably supported on a mounting body for reciprocating the spindle, a manual drive mechanism for rotating the rotary shaft by a manual handle, Drive switching device that switches the rotating shaft to an electric drive mechanism that is driven to rotate by a motor, a rotation transmission mechanism that decelerates the rotation of the rotating shaft and transmits the rotation amount of the rotating shaft to a display device, and is incorporated in the rotation transmission mechanism A switch unit, a terminal unit connected to the switch unit, and a controller for controlling the opening / closing operation of the valve according to information about the valve through the switch unit and the terminal unit,
The terminal unit includes a terminal block having a plurality of step portions for arranging terminals connected to at least a power source, a sensor, and a central controller by wiring. The terminal block is disposed on the step portion to form the terminal and the terminal block. Conductive metal fittings extending from the other surface of the terminal block through the through-holes formed in the stepped portions of the stepped portions, respectively, and arranged spaced from the other surface of the terminal block and connected to the end portions of the conductive metal fittings, respectively. A relay board provided with the printed wiring, and a connector connected to a contact of the printed wiring of the relay board and selectively connected to various electrical components, and the extension portion and the terminal of the conductive metal fitting A seal member is disposed in a gap between the through hole of the base, and the one surface and the other surface of the terminal block are sealed off by the seal member and formed on the terminal block. The step portion positioned vertically, as the wiring of the vertical position to be connected to the terminal of the step portion does not interfere, it relates to a valve driving actuator device consists of being formed at a position offset from one another.
[0009]
The conductive metal fitting includes a mounting portion having a screw hole constituting the terminal disposed in the stepped portion, a bent portion extending from the mounting portion, and penetrating through the through hole of the terminal block. It consists of a straight extension extending from the other surface, and the attachment part and the extension part are formed in an integrated structure by pressing.
[00 10 ]
In addition, the relay board arranged separately from the other surface of the terminal block can be replaced with another relay board having a different printed wiring corresponding to the change of the electrical component connected to the terminal. And attached to the terminal block.
[00 11 ]
Since the terminal unit is configured as described above, various types of printed wiring on the relay board are prepared depending on the structure in which the printed circuit board is incorporated in the middle of the wiring between the terminal of the terminal block and the electrical component. If this is the case, it can be replaced with another printed circuit board with different printed wiring according to the increase / decrease in the number of electrical parts, and the connection of the electrical parts can be changed with the relay board. It is possible to avoid complicated direct connection, improve assembly workability such as wiring, unitize, standardize, realize cost reduction, and make the structure simple and compact.
[00 12 ]
The electrical component connected to the terminal unit includes at least an electrical component constituting the switch unit and an electrical component constituting the controller.
[00 13 ]
Since the valve drive actuator device is configured as described above, the electrical components such as the switch unit, the controller, and the motor may include the switch unit, the controller, the motor, and the like depending on the model of the valve drive actuator. Although the electrical components of the terminal unit are different, it can be easily handled by changing the relay board of the terminal unit, and the rotation transmission mechanism incorporating the switch unit and the terminal unit can be accommodated in one case, and the rotation transmission mechanism is provided with the The wiring between the switch unit and the terminal unit can be simplified, the workability can be improved, the entire apparatus can be made compact, and electrical components such as control devices can be simply installed.
[00 14 ]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a valve drive actuator device incorporating a terminal unit according to the present invention will be described with reference to the drawings.
[00 15 ]
The terminal unit incorporated in the valve drive actuator device according to the present invention will be described with reference to FIGS.
[00 16 ]
First, the terminal unit 4 includes a terminal block 80 provided with a plurality of stepped portions 83 on one surface, and a relay board 81 arranged on the back surface of the terminal block 80. Terminals 82 are respectively provided on the step portions 83 of the terminal block 80. Each terminal 82 is connected to at least a power supply 78, a sensor 24 such as a water level sensor, a flow rate sensor, a pressure sensor, a temperature sensor, a central opening receiving device 79, and a central controller 77 through a wiring 86A. In the terminal unit 4, the conductive metal fitting 89 is disposed on the stepped portion 83 of the terminal block 80 to form the terminal 82, and penetrates through the through holes 91 formed in the stepped portion 83 of the terminal block 80, respectively. It arrange | positions so that it may extend from the other surface. One contact 88B of the printed wiring 87 provided on the relay substrate 81 is connected to the end of the conductive metal fitting 89, respectively. Further, the other contact 88A of the printed wiring 87 of the relay substrate 81 is connected to a connector 85 that is selectively connected to various electric parts such as a power source, a control unit, and a drive control unit by wirings 86, 103, and 104. Has been. Although not shown, the connector 85 can be directly connected to the position of the contact 88A of the printed wiring 87 of the relay board 81.
[00 17 ]
The power supply 78 is fixedly connected to the power supply terminal 102 of the terminal block 80 with a screw 100 and is connected to the controller through a power supply connector 85 connected to the wiring 103 extending from the power supply terminal 102 via the conductive metal fitting 101 of the power supply terminal 102. 25. The motor 11 is connected to the controller 25 through the wiring 104 connected to the power supply terminal and the connector 85 provided at the end of the wiring 104, and is driven and controlled by the controller 25. Further, a control wiring 86 and a magnet switch wiring 86 are connected to the contact 88 of the terminal 69 of the printed wiring 87 of the relay board 81 to which the conductive metal fitting 89 of the terminal block 80 is connected. These wires 86 are connected to the controller 25 through connectors 85 provided at the ends thereof, and are connected to the magnet switches 29 and 30 through the magnet switch wires 86 and connectors 85 provided at the ends thereof.
[00 18 ]
The conductive metal fitting 89 includes a mounting portion 93 provided with a screw hole 95 constituting the terminal 82 disposed in the step portion 83, a bent portion extending from the mounting portion 93, and penetrating through the through hole 91 of the terminal block 80. It is composed of a straight extension 94 extending from the other surface of 80. The attachment portion 93 and the extension portion 94 constituting the conductive metal fitting 89 can be formed into an integral structure by pressing. The wiring 84 and the conductive metal fitting 89 at the terminal 82 of the terminal block 80 are connected by placing the crimping terminal 96 connected to the wiring 84 on the mounting portion 93 of the conductive metal fitting 89 and tightening the screw 90 into the screw hole 95. Can be achieved.
[00 19 ]
A seal member 92 is disposed in the gap between the extension portion 94 of the conductive metal 89 and the through hole 91 of the terminal block 80, and one surface and the other surface of the terminal block 80 are sealed off by the seal member 92. Therefore, even if external electrical components are attached to the terminal block 80 of the terminal unit 4 and the sealing performance between the terminal unit 4 and the explosion-proof waterproof case 17 (FIG. 11) is insufficient, the terminal block 80 itself Intrusion of moisture and gas into the relay substrate 81 arranged on the back side of the terminal block 80 can be prevented.
[00 20 ]
In the Terminal unit 4, the relay substrate 81, as can be replaced with another relay board having a printed circuit 87 which is different in correspondence to the change of the electrical components connected to the terminal 82, it is attached to the terminal block 80. Further, the stepped portions 83 formed in large numbers on the terminal block 80 are offset from each other so that the upper and lower wirings 86 connected to the terminals 82 of the stepped portion 83 do not interfere with each other. That is, it is formed in a staggered arrangement. The electrical components include the control devices 19 constituting the micro switches 29 and 30, the motor 11, and the controller 25 provided in the switch unit 3 described later.
[00 21 ]
Next, an embodiment of the valve driving actuator device according to the present invention will be described with reference to FIGS.
[00 22 ]
The valve drive actuator device according to the present invention is particularly characterized in that the terminal unit 4 is incorporated. For example, the built-in controller 25 receives a command from the central controller 77, and the valve 21 is controlled by the controller 25. And controlling the opening and closing of the flow path 57 by the valve 21, and information such as the operating state of the valve 21, the flow velocity of the flow path 57, the flow rate, and the like such as a water level sensor, a flow rate sensor, a pressure sensor, and a temperature sensor. 24, the limit switch 28, the torque switch 27 and the like, and the controller 25 receiving the information adjusts the opening and closing of the valve 21 to an optimum state according to the information about the valve 21 and the flow path 57. It is something to control.
[00 23 ]
This valve drive actuator device generally has a flow rate provided in a flow path 57 such as a water passage attached to the spindle 1 or the spindle 1 which is a valve rod attached to the attachment body 6 in the housing 5 so as to be able to reciprocate. A valve 21 to be adjusted, a controller 25 comprising electric components constituting a control device 19 for driving and controlling the spindle 1 according to various information, a manual handle 12 for manually driving the spindle 1, and a spindle 1 are automatically driven. And a spindle cover 22 attached to the attachment body 6 to cover the spindle 1.
[00 24 ]
This actuator for driving a valve attaches and attaches a worm 10 that meshes with a worm wheel 9 that is rotationally driven to reciprocate the spindle 1 and spindle 1 that constitute a valve rod to which a valve 21 that opens and closes a flow path 57 is attached. A rotary shaft 8 rotatably attached to the main body 6, a drive switching device 2 for switching the rotary shaft 8 to a manual drive mechanism for rotationally driving the rotary shaft 8 by a manual handle 12 or an electric drive mechanism for rotationally driving the rotary shaft 8 by a motor 11. The rotation transmission mechanism 20 that transmits the rotation of the motor 8 at a reduced speed to the display device 15 that displays the rotation amount of the rotary shaft 8, the switch unit 3 incorporated in the rotation transmission mechanism 20, and various information about the valve 21 and the flow path 57. A terminal unit connected to the switch unit 3 and the controller 25 for controlling the switch unit 3 for replacement. It is composed of four.
[00 25 ]
This actuator device for driving the valve is operated by operating a manual switching lever 18 to switch the drive switching device 2 to the manual drive mechanism, and switching to the electric drive mechanism is performed by the automatic return mechanism unit according to the rotation of the motor 11. It is automatically switched by 32. The rotating shaft 8 is rotatably supported by the mounting bodies 6 and 61 by bearings 63. The rotating shaft 53 rotated by the manual handle 12 is rotatably supported on the mounting body 6 by a bearing 64. The operation shaft 62 rotated by the manual switching lever 18 is rotatably supported by the mounting body 6. The rotary shaft 8, the rotary shaft 53, and the operation shaft 62 are arranged in parallel with each other, and the operation of the manual handle 12 and the manual switching lever 18 is drivingly connected to the rotary shaft 8 that rotationally drives the spindle 1. The rotating shaft 8 includes a rotating shaft 8A provided with the worm 10 and a rotating shaft 8B in which a spline 35 is fitted so that the sleeve 34 can slide.
[00 26 ]
The sleeve 34 is formed with a claw or dog tooth constituting the meshing clutch 31 at one end thereof and a gear 55 at the other end thereof. Further, on the rotating shaft 8B, an automatic return mechanism unit 32 provided with the other pawl, that is, dog tooth, of the meshing clutch 31 is rotatably provided. When the mesh clutch 31 is connected, the dog teeth of the sleeve 34 and the dog teeth of the automatic return mechanism unit 32 are in mesh. Further, a gear 33 that meshes with a gear 59 provided on the output shaft 72 of the motor 11 is rotatably provided on the rotary shaft 8B. Further, a buffer member 60 is interposed between the automatic return mechanism unit 32 and the gear 33. The cam yoke 56 provided on the operation shaft 62 is engaged with a groove 65 provided on the outer peripheral surface of the sleeve 34. When the cam yoke 56 is rotated by the rotation of the operation shaft 62 by the manual switching lever 18, the sleeve 34 is moved over the rotation shaft 8. The meshing clutch 31 can be connected / disconnected by sliding. The sleeve 34 is disengaged from the clutch clutch 31 against the spring force of the spring 36 by the manual switching lever 18 and slides, and the gear 54 provided on the rotating shaft 53 rotated by the gear 55 of the sleeve 34 and the manual handle 12. Will mesh with each other. When the gear 55 and the gear 54 mesh with each other, the manual handle 12 is switched to a manual drive mechanism that rotates the rotary shaft 8.
[00 27 ]
As shown in FIG. 14, this valve drive actuator device accommodates a rotation transmission mechanism 20 in a case 7 that accommodates a plurality of attachment plates 14 that are attached to the attachment body 6 and spaced apart and arranged in parallel. , Between the mounting plates 14 adjacent to each other, a speed reduction device 26 that constitutes a part of the rotation transmission mechanism 20 that transmits the rotation of the rotary shaft 8, and at least a torque switch 27 and a limit switch 28 that constitute the switch unit 3, respectively. It is attached and the device itself is made compact by reducing the number of parts.
[00 28 ]
The switch unit 3 is composed of a counter mechanism and is accommodated in a case 7 attached to the attachment body 6. The switch unit 3 has at least a unitized torque switch 27 for detecting the torque of the rotary shaft 8 and a limit switch 28 for detecting the upper limit and the lower limit of the reciprocating movement of the valve 21. The torque switch 27 is a switch mechanism 27A for detecting the torque of the rotary shaft 8 and two micro switches provided in the torque switch 27 for detecting the upper and lower limits of the valve opening direction and the valve closing direction. 29 (only one is shown). The limit switch 28 includes a switch mechanism 28A for detecting the upper and lower limits of the reciprocating movement of the valve 21 and two micro switches 30 (only one is shown) for detecting the upper and lower limits of the reciprocating movement of the valve 21. It is configured. The switch unit 3 includes a flicker switch 37S (FIG. 11), an interlock switch 66 (FIG. 12), a potentiometer that constitutes the far opening instruction transmitter 67 in addition to the above-described control device. In addition, the case 7 that houses the switch unit 3 is provided with an explosion-proof waterproof cover 16 in order to block the inside from the outside.
[00 29 ]
The terminal unit 4 is attached to the attachment body 6 adjacent to the switch unit 3. The case 7 that accommodates the terminal unit 4 is provided with an explosion-proof waterproof cover 17 in order to shield the inside from the outside. The terminal unit 4 constitutes a power supply terminal composed of an input side terminal 68 that connects each control device of the switch unit 3 and the controller 25 and an output side terminal 69 that is connected to the switch unit 3 via a printed circuit board 70. The input side terminal 68 and the output side terminal 69 are sealed in the terminal body 71.
[00 30 ]
Furthermore, a control case 23 that accommodates a controller 25 is attached to the attachment body 6 constituting the housing 5. The controller 25 includes an electrical component 19 that includes at least a magnet switch that controls the switch unit 3. The control case 23 is provided with an explosion-proof waterproof cover 58 in order to block the inside from the outside. The controller 25 is connected to one terminal of the terminal unit 4 and exchanges information with various control devices of the switch unit 3 to control the operation of the valve 21 in an optimum state.
[00 31 ]
Further, the drive switching device 2 includes a meshing clutch 31 that is connected / disconnected by the manual switching lever 18 and an automatic return mechanism unit 32 that switches to driving of the electric drive mechanism by the rotation of the motor 11. The drive switching device 2 is normally set to a drive state by the motor 11 by the automatic return mechanism unit 32, and when the operator manually operates the valve drive actuator device for inspection of the valve drive actuator device, etc., the manual switch lever 18 so that the manual handle 12 can be operated.
[00 32 ]
This valve drive actuator device is as follows when driven by the motor 11. First, the motor 11 receives various information and rotates according to a command from the controller 25. The motor 11 is driven to rotate the gear 33 that is rotatably attached to the rotary shaft 8 via the gear 59 to operate the automatic return mechanism unit 32. When the automatic return mechanism unit 32 is actuated by the rotation of the motor 11, the sleeve 34 is engaged with the spring force of the spring 36, the clutch 31 is engaged, the rotation of the gear 37 is transmitted to the sleeve 34, and the sleeve 34 rotates. A spline 35 is formed on the inner peripheral surface of the sleeve 34, and the spline 35 of the sleeve 34 is spline-fitted with the spline 35 formed on the rotating shaft 8, so that the rotation of the sleeve 34 is transmitted to the rotating shaft 8. Is done. The worm 10 attached to the rotary shaft 8 is rotated by the rotation of the rotary shaft 8, and the rotation of the worm 10 rotationally drives the worm wheel 9 provided on the spindle 1. As the rotary shaft 8 rotates, the worm 10 rotates and the worm wheel 9 meshing with the worm 10 rotates. The worm wheel 9 is rotated by rotating the internal thread 56S (FIG. 8) through a driving force transmission mechanism (not shown) that converts the rotational motion into a vertical motion, and the spindle 1 provided with the male screw 73 that meshes with the female screw 56S moves up and down. To do. Since the valve 21 is attached to the tip of the spindle 1, the valve 21 moves up and down, and the flow path 57 is adjusted to open and close. On the other hand, the rotation of the rotating shaft 8 is transmitted to the rotating shaft 13.
[00 33 ]
This valve drive actuator device can extract the open / close state of the flow path of the valve 21 or various information by detecting the number of rotations of the rotary shaft 8, and the valve drive actuator device is Drive control is performed. The rotation of the rotating shaft 8 is transmitted to the rotating shaft 13 through the gear mechanism 38. The rotation of the rotating shaft 13 rotates the input side rotating shaft 41 via the gear mechanism 40. A gear 43 is fixed to the input side rotating shaft 41, and an output side rotating shaft 42 arranged coaxially with the input side rotating shaft 41 is rotatably supported on the gear 43. The rotation of the gear 43 provided on the input side rotation shaft 41 is transmitted to the input gear 47 of the speed reduction device 26, decelerated by a plurality of gear trains 49 of the speed reduction device 26, and transmitted to the output gear 48 of the speed reduction device 26. The rotation of the output gear 48 is transmitted to the gear 44 fixed to the output side rotating shaft 42 and is output as the rotation of the output side rotating shaft 42.
[00 34 ]
A pointer 45 is attached to the end portion of the output side rotating shaft 42. A scale plate 46 is attached to one of the plurality of mounting plates 14 fixed in the case 7. The scale plate 46 can be seen through a transparent plate 50 provided on the explosion-proof waterproof cover 16. The pointer 45 can detect the degree of opening and closing of the valve 21 with the eyes by rotating on the scale plate 46.
[00 35 ]
In this valve drive actuator device, the rotational force of the rotary shaft 8 is transmitted to the rotary shaft 13A via the gear mechanism 38A and the torque shaft 39, and the rotation of the rotary shaft 13A is switched by the torque switch 27 via the gear mechanism 51. The torque is transmitted to the mechanism 27A, and the torque of the rotating shaft 8 is detected by the torque switch 27. The operating state of the torque switch 27, that is, the upper and lower limit overtorque states are input to the controller 25 through the microswitch 29. The rotation of the rotary shaft 8 is transmitted to the rotary shaft 13 through the gear mechanism 38, and the rotation of the rotary shaft 13 rotates the input-side rotary shaft 41 through the gear mechanism 40. The rotation of the input side rotating shaft 41 is transmitted to the switch mechanism 28A of the limit switch 28 formed of a counter mechanism via the gear mechanism 52, and the limit switch 28 detects the rotation speed of the rotating shaft 8. The operating state of the limit switch 28, that is, the upper limit and the lower limit are input to the controller 25 through the micro switch 30.
[00 36 ]
Next, this valve drive actuator device is operated as follows when operated by the manual handle 12. First, in order to operate the drive switching device 2, the manual switching lever 18 is rotated, and the cam yoke 56 fitted to the sleeve 34 is rotated. The rotation of the cam yoke 56 causes the sleeve 34 to slide on the rotary shaft 8 against the spring force of the spring 36, disengage the sleeve 34 from the clutch 31, and release the drive connection state with the motor 11. Further, when the cam yoke 56 is rotated and the sleeve 34 is slid, the gear 55 of the sleeve 34 meshes with the gear 54 provided on the rotating shaft 53 to which the manual handle 12 is attached.
[00 37 ]
When the manual handle 12 is rotated after the gear 55 of the sleeve 34 and the gear 54 provided on the rotary shaft 53 are engaged with each other by the above operation, the rotary shaft 53 rotates. The sleeve 34 is rotated. As the sleeve 34 rotates, the rotary shaft 8 rotates. As the rotary shaft 8 rotates, the worm 10 rotates and the worm wheel 9 meshing with the worm 10 rotates. As the worm wheel 9 rotates, the valve 21 moves up and down through the same transmission path as described above, and the flow path 57 is adjusted to open and close. On the other hand, the rotation of the rotating shaft 8 is transmitted to the rotating shaft 13. Similarly to the above, the rotation of the rotary shaft 13 can rotate the display device 15 including a pointer and send information to the torque switch 27 and the limit switch 28.
[00 38 ]
【The invention's effect】
As described above, the terminal unit incorporated in the valve drive actuator device according to the present invention is arranged in a staircase pattern and a staggered pattern on the terminal block, thereby avoiding interference between adjacent wires and improving workability. In particular, by providing a relay board on the terminal block, it can be easily dealt with by using a different printed wiring relay board according to the type of electrical component to be used. In addition, the gap that occurs when the metal fittings that make up the terminal are installed through the through hole of the terminal block is sealed with a sealing member, so one surface located outside the terminal block and the relay board are placed Airtight and liquid-tight shut-off from the other side of the inner side, moisture and flammable gas can be prevented from entering the inside, wiring and other corrosion and short circuit due to corrosion can be prevented, and flammable gas such as sparks can be prevented. Can prevent ignition.
[00 39 ]
In addition, since this valve drive actuator device incorporates the terminal unit described above, the above-mentioned effects can be exhibited, and the device itself can be made compact by reducing the number of parts compared to the conventional device. In particular, in the case containing the switch unit, the torque switch and limit switch control devices can be properly arranged between adjacent mounting plates, and the structure can be optimally adapted to legal regulations.
[Brief description of the drawings]
FIG. 1 is a plan view showing a terminal unit incorporated in a valve drive actuator device according to the present invention.
FIG. 2 is a front view of the terminal unit of FIG.
FIG. 3 is a rear view of the terminal unit of FIG. 1;
4 is a side view of the terminal unit of FIG. 1. FIG.
5 is a cross-sectional view showing a mounting structure of a conductive metal fitting constituting a terminal in the terminal unit of FIG. 1. FIG.
6 is a plan view of terminals of the terminal unit shown in FIG. 5. FIG.
7 is a schematic diagram for explaining a usage state of the terminal unit of FIG. 1; FIG.
FIG. 8 is a partial cross-sectional schematic view showing the valve drive actuator device according to the present invention.
FIG. 9 is a front view showing a part of the valve drive actuator device.
10 is a side view showing a part of the valve drive actuator device of FIG. 9; FIG.
FIG. 11 is a cross-sectional view showing a main part of the valve drive actuator device.
12 is a side view of the valve drive actuator device of FIG. 11. FIG.
13 is a cross-sectional view showing a part of the valve drive actuator device of FIG. 11. FIG.
14 is an explanatory view of a partial cross section showing a switch unit of the valve drive actuator device of FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spindle 2 Drive switching device 3 Switch unit 4 Terminal unit 6, 61 Mounting body 7 Case 8 Rotating shaft 11 Motor 12 Manual handle 20 Rotation transmission mechanism 21 Valve 24 Sensor 25 Controller 77 Central controller 78 Power supply 80 Terminal block 81 Relay board 82 Terminal 83 Step portion 84, 86, 103, 104 Wiring 85 Connector 87 Printed wiring 88 Contact 89 Conductive metal fitting 90,100 Screw 91 Through hole 92 Seal member 93 Mounting portion 94 Extension portion 95 Screw hole

Claims (4)

A spindle with a valve for opening and closing the flow path, a rotary shaft rotatably supported by a mounting body for reciprocating the spindle, a manual drive mechanism for rotating the rotary shaft with a manual handle, or a motor for the rotary shaft A drive switching device that switches to an electric drive mechanism that is driven to rotate by rotation, a rotation transmission mechanism that decelerates the rotation of the rotation shaft and transmits the rotation amount of the rotation shaft to a display device, and a switch unit incorporated in the rotation transmission mechanism , A terminal unit connected to the switch unit, and a controller for controlling the opening / closing operation of the valve according to information about the valve through the switch unit and the terminal unit,
The terminal unit includes a terminal block having a plurality of step portions for arranging terminals connected to at least a power source, a sensor, and a central controller by wiring. The terminal block is disposed on the step portion to form the terminal and the terminal block. Conductive metal fittings extending from the other surface of the terminal block through the through-holes formed in the stepped portions of the stepped portions, respectively, and arranged spaced from the other surface of the terminal block and connected to the end portions of the conductive metal fittings, respectively. A relay board provided with the printed wiring, and a connector connected to a contact of the printed wiring of the relay board and selectively connected to various electrical components, and the extension portion and the terminal of the conductive metal fitting A seal member is disposed in a gap between the through hole of the base, and the one surface and the other surface of the terminal block are sealed off by the seal member and formed on the terminal block. The step portion positioned vertically, said as the wiring of the vertical position does not interfere to be connected to the terminal of the step portion, the valve driving actuator device consists of being formed at a position offset from one another.   The conductive metal fitting includes a mounting portion provided with a screw hole that constitutes the terminal disposed in the stepped portion, a bent portion extending from the mounting portion, and penetrating through the through hole of the terminal block. 2. The valve drive actuator device according to claim 1, comprising a straight extension extending from a surface, wherein the attachment and the extension are integrally formed by pressing. 3.   The relay board disposed away from the other surface of the terminal block can be replaced with another relay board having a different printed wiring corresponding to the change of the electrical component connected to the terminal. 2. The valve drive actuator device according to claim 1, wherein the valve drive actuator device is attached to the terminal block.   The valve drive actuator device according to claim 1, wherein the electrical component connected to the terminal unit includes at least an electrical component constituting the switch unit and an electrical component constituting the controller.

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