JPH08324483A - Versatile hydraulic actuator for valve opening and closing - Google Patents

Abstract

PURPOSE: To enable a valve opening and closing device to be used for various applications in which the rotation having the high output is obtained by miniaturizing the device, to enable the device to be mounted on a standard valve, and to improve safety. CONSTITUTION: One end of a driving shaft 1 is directly connected to a hydraulic motor shaft 2, a meshed gear group from a first gear 5 assembled in the driving shaft 1 whose the other end is taken as a manual opening and closing shaft to a main gear 7 assembled in an output shaft 6 is constituted of a deceleration device (a) and a hydraulic motor (b) incorporated in an oil and water sealing gear case 4, and combined with the valve through a distance piece 18 between the output shaft 6 and the valve.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing device for ships.

[Prior Art] In recent years, the number of large-diameter pipe sluice valves used in cargo tanks of coastal tankers has increased. Valve opening and closing actuators are commonly used in hydraulic cylinders.

Conventionally, as shown in FIG. 7, a sluice valve C is opened and closed by a valve body 32 moving up and down with respect to a valve seat 31 of a main body 30, which is opened and closed by a hydraulic cylinder 34 by a cylinder mount 33. The valve rod 36 is fixed to the piston 35 of the hydraulic cylinder 34, and the valve body 32 is opened and closed by the movement of the piston 35.
The height of a sluice valve having a diameter of m is 2560 mm. Since the valve seat 31 and the valve body 32 are tapered in a wedge shape, a slight force is applied to the valve rod 36 to cause a leak. This means that the upper chamber 3 of the piston 35 of the hydraulic cylinder 34
7 and the lower chamber 38 differ in the area of the valve rod 36, and when the hydraulic power supply pack is stopped, the temperature difference causes the oil in the hydraulic cylinder 34 to expand and contract, and the force balance between the upper and lower sides of the piston 35 is lost. Further, after a long time has passed, the air in the oil is separated and the piston 35 becomes unstable in a stopped state.

[Problems to be Solved by the Invention] As described in the prior art, a valve actuator that directly opens and closes by using a large-diameter hydraulic cylinder in a sluice valve is generally known. However, with these systems,
It has the following drawbacks. (1) When the air contained in the oil inside the hydraulic cylinder and the oil in the middle of the pipe is completely closed for a long time, the air separates and the inside of the cylinder becomes an elastic body that cannot be held and the sluice valve opens and leaks. (2) Standard sluice valves cannot be used, and many valve bodies need to be modified, especially when modifying existing ships. (3) It is very difficult to open and close the valve when the hydraulic equipment fails. (4) When the valve body and hydraulic cylinder are set, the pipe diameter is more than four times the height of the pipe, and it is difficult to take measures against wave and vibration when equipped on a ship. (5) It is difficult to provide a valve inside the tank and equip the actuator outside the tank.

The present invention has been made in view of such inadequacies of the prior art, and its object is to be compact and versatile, to be compatible with standard valves, and to be safe. It is intended to improve the

[Means for Solving the Problems] In order to achieve the above object, the present invention incorporates a reduction gear in a hydraulic motor and an oil-tight gear case to form a distance piece between an output shaft and a valve. It is characterized by combining valves through.

[Operation] With the above-mentioned configuration, a compact and high-output rotational force can be obtained by the combination of the hydraulic motor and the gear. By combining the valve through the distance piece between the output shaft and the valve, it can be used for various purposes. Can be supported. In addition, not only can it be opened and closed manually in an emergency, but because the speed from the hydraulic motor shaft to the output shaft is reduced, even if a small amount of air is contained in the oil, the rotation of the hydraulic motor will not change. The safety is improved without giving rotation until the valve opens and leaks.

[Embodiment] An embodiment of the present invention will now be described with reference to the drawings. As shown in FIG. 1, in a valve opening / closing actuator, one end of a drive shaft 1 is fitted and joined to a hydraulic motor shaft 2. Then, the other end is a manually open shaft 3, and is assembled to the intermediate shaft 8 between the first gear 5 assembled to the drive shaft 1 and the main gear 7 assembled to the output shaft 6 in the gear case 4. The second gear 9 is meshed with each other, and the rotational direction of opening and closing of the manual opening / closing shaft 3 and the opening / closing direction of the valve are aligned with each other. The drive shaft 1, the intermediate shaft 8 and the output shaft 6 are supported by bearings 10, and the gear case 4 is an oil-tight structure. A seal 11 is provided at the open end of the gear case 4 of the drive shaft 1 and the output shaft 6, and the gear case 4 is made oil and watertight. The pinion is driven through the reduction gear 12 driven from the upper part of the output shaft 6. The shaft 13 through the gear case 4 Only, and a reduction gear a and hydraulic motors b provided with the opening indicator 14 in the gear case 4 top.

In FIG. 2, when equipped with a standard sluice valve,
The figure (A) shows a standard gate valve. (B) shows that when the standard sluice valve is equipped with the valve opening / closing actuator of the invention, the handle 15b is removed and the valve body 30 and the packing box 15 are removed.
A spacer 17a is sandwiched between a and a gear case 4 is fixed to the spacer 17a by a stand 17b at a position where the output shaft 6 of the reduction gear a and the valve spindle 16 are aligned, and the output shaft 6 and the handle 15b of the valve 15 are fixed. Distance piece 1 on top of the valve spindle 16
8, the output shaft 6 is rotated by controlling the rotational direction of the drive shaft 1, and the valve 1 is rotated through the valve spindle 16.
Opening / closing operation 5 is performed.

In FIGS. 3 and 4, when the valve is equipped,
The gear case 4 is fixed to the valve 15 by the stand 17 at a position where the output shaft 6 of the speed reducer a and the valve spindle 16 are aligned with each other, the distance piece 18 is fitted to the output shaft 6, and the rotation direction of the drive shaft 1 is adjusted. The output shaft 6 and the distance piece 18 are rotated by the control, and the distance piece 18 is rotated.
By rotating the inner screw 19 along the threaded portion of the valve spindle 16, the valve spindle 16 moves up and down to open and close the valve 15.

In FIG. 5, when equipped on a deck stand, the gear case 4 is fixed to the deck stand 20 installed on the deck 22 at a position where the output shaft 6 of the reduction gear a and the spindle 21 are aligned. Spindle 2 on output shaft 6
1 is connected via a distance piece 18 and a drive shaft 1
The output shaft 6 is rotated by the rotation direction control of the spindle 2
The valve opening / closing operation is performed via 1.

FIG. 6 shows a hydraulic circuit including a power unit 2
Oil is supplied from 5 to the hydraulic control valve 26, and the hydraulic control valve 26 has a hydraulic motor idle circuit at the control position in the rotational direction of the forward rotation 27, the reverse rotation 28 and the neutral position 29, and the manual open / close shaft 3 is manually operated. The valve 15 can be opened and closed by rotating. The hydraulic control valve can be operated by a manual switching valve, an electromagnetic switching valve, a machine side operation, or a remote operation. Although not specifically described in the drawings, it can be installed inside the tank.

Since the present invention is configured as described above, it has the following effects. The present invention provides a compact and high-output rotational force by combining the hydraulic motor and the gear, and can be used for various purposes by combining the valve via the distance piece between the output shaft and the valve. In addition, not only can it be opened and closed manually in an emergency, but because the speed from the hydraulic motor shaft to the output shaft is reduced, even if a small amount of air is contained in the oil, the rotation of the hydraulic motor will not change. The safety is improved without giving rotation until the valve opens and leaks.

[Brief description of drawings]

FIG. 1 is a sectional view of a valve opening / closing actuator of the present invention.

FIG. 2 (A) is a standard sluice valve, and FIG. 2 (B) is a sectional view showing the standard sluice valve equipped with the valve opening / closing actuator of the present invention.

FIG. 3 is a side view of the target valve equipped with the valve opening / closing actuator of the present invention.

FIG. 4 is a side view of a rise valve equipped with the valve opening / closing actuator of the present invention in a sluice valve.

FIG. 5 is a side view of the deck stand equipped with the valve opening / closing actuator of the present invention.

FIG. 6 is a hydraulic circuit diagram of the valve opening / closing actuator of the present invention.

FIG. 7 is an assembly diagram of a conventional valve opening / closing actuator using a hydraulic cylinder.

[Explanation of symbols]

 1 Drive Shaft 2 Hydraulic Motor Shaft 3 Manual Opening / Closing Shaft 4 Gear Case 5 1st Gear 6 Output Shaft 7 Main Gear 8 Intermediate Shaft 9 2nd Gear 10 Bearing 11 Seal 12 Reduction Gear 13 Pinion Shaft 14 Openness Indicator 15 Valve 15a Packing Box 15b Handle 16 Valve spindle 17a Spacer 17b Stand 18 Distance piece 19 Inner distance piece screw 20 Deck stand 21 Deck stand spindle 22 Deck 25 Power unit 26 Hydraulic control valve 27 Forward rotation position 28 Reverse rotation position 29 Neutral position 30 Body 31 valve Seat 32 Valve body 33 Cylinder mount 34 Hydraulic cylinder 35 Piston 36 Valve rod (spindle) 37 Upper chamber 38 Lower chamber a Speed reducer b Hydraulic motor c Gate valve

Claims (3)

[Claims] 1. In a valve opening / closing actuator device, one end of the shaft is directly connected to a hydraulic motor shaft, and the other end is a main gear assembled to an output shaft from a first gear assembled to a drive shaft having a manual opening / closing shaft. In the gear group that has been meshed up to, the combination is used as an odd number gear, and a pinion shaft driven through a reduction gear driven from the upper part of the output shaft is provided through the gear case to indicate the opening degree on the upper part of the gear case. It consists of a speed reducer equipped with a meter and a hydraulic motor.The output shaft of the gear case and the spindle are fixed on a valve or a deck stand with a stand in a position where they are aligned, and the output shaft and the spindle are connected via a distance piece. Connect
An actuator for valve opening / closing, wherein an output shaft is rotated by controlling a rotation direction of a drive shaft, and a valve is opened / closed via a spindle. 2. A hydraulic motor idle circuit is provided in the hydraulic control valve so that the hydraulic control valve can be controlled by a hydraulic control valve mounted on the remote side or on the machine side in a rotating direction and the manual opening / closing shaft can be rotated. Actuator for valve opening and closing. 3. The valve opening / closing actuator according to claim 1, wherein an oil seal is provided at a gear case opening portion of the drive shaft, the output shaft and the like, and the gear case has an oil-water tight structure.