JPH10231942A - Valve drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve drive device which is embodied compactly, requires a small space for valve mounting, and assures easy installing works. SOLUTION: A piping system is connected between a booster to send out oil with boosted pressure and a cylinder 1 to open and close a valve with the oil, and in this piping system, a selector valve to change over the valve opening and closing and a speed adjusting valve 2 to adjust the valve opening/closing speed are mounted. In this valve device, the speed adjusting valve 2 is of right angle type, and is mounted on at least one side of a piping 4 connected with the inlet/outlet of the cylinder 1, and thereby the amount of the oil flowing is adjusted so as to regulate the operating speed of the cylinder 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve driving device for operating a shutoff valve or a discharge valve provided in a pipeline for sending gas or liquid.

[0002]

2. Description of the Related Art A circuit diagram shown in FIG. 7 shows an example of a valve drive device used for operating a shutoff valve or a discharge valve provided in a pipeline for sending gas or liquid. FIG. 1 is used as a circuit explanatory diagram of the apparatus when explaining a conventional example and an embodiment (described later) of the present invention. FIG.
In the figure, reference numeral 51 denotes a booster, which sends the pressurized oil in a hydraulic cylinder 51b to a piping system 52 from a port 51c for sending out pressurized oil by, for example, air pressure in a gas accumulator tank 51a.

Reference numeral 53 denotes a cylinder which opens and closes a valve 54. The ports 53a and 53b are connected to a piping system 52, and the oil (oil pressure) sent from the booster 51 operates the cylinder 53 via the piping system 52. Then, the valve 54 is opened and closed.

As described above, the booster 51 and the cylinder 53
In the piping system 52 connected between the
And a speed adjusting valve 56 for adjusting the opening / closing speed of the valve 54.

In FIG. 7, reference numeral 57 denotes a booster 51.
Supply / exhaust valve 58, a manual opening / closing valve of the piping system 52,
59 is an electric pump, 60 is a manual pump, 61 is an oil tank, 62 is a pressure gauge, 63 is a safety valve, 64 and 65 are double check valves, 66 is a power supply, 67 is a control box,
68, 69, 70 and 71 are limit switches.

[0006] In the valve driving device as shown in FIG.
For example, the speed control valve 56 is generally of a direct type in which an outlet and an inlet are provided on both sides of the main body. For this reason, the speed control valve 56 is incorporated between pipes including a pipe joint for mounting the speed control valve 56. This required a longer and wider mounting space.

If the operating oil pressure increases, the speed adjusting valve 5
6, the other components and piping constituting the piping system 52 also become large, and the curvature of the curved pipe becomes large, so that the entire valve driving device becomes large. In order to prevent the valve drive device from becoming large and to make the valve drive device compact, the size of each device and piping is reduced, the fluid resistance increases, the efficiency becomes inefficient, and the valve drive device including the piping system 52 is provided. Is extremely troublesome.

In the example shown in FIG. 7, the operating speed of the cylinder 53 is adjusted by the speed adjusting valve 56 attached to the pipes 52a and 52b connected to the inlet / outlet 53a or 53b of the cylinder 53. In some cases, a speed adjusting valve is mounted in place of the manual opening / closing valve 58 mounted on the pipe 52c connected to the pipe 52c, and the amount of oil sent from the booster 51 is adjusted to adjust the operating speed of the cylinder 53.

Also in this case, the speed adjusting valve is of a direct type and requires a long and wide mounting space similarly to the valve driving device shown in FIG. 7. When the operating oil pressure is increased, the entire valve driving device becomes large. If each device or piping is made compact to make it compact, it becomes inefficient, and the assembling work becomes extremely troublesome.

[0010]

An object of the present invention is to provide a valve drive in which a piping system is connected between a booster and a cylinder, and a switching valve and a speed control valve are mounted in the piping system. In the equipment, the speed control valve is a direct type and requires a long and wide mounting space, and when the operating oil pressure is high, the entire valve driving device becomes large, and in order to make it compact, each equipment and piping are made compact. Is to be inefficient, and the assembling work becomes extremely troublesome. The purpose is to solve these problems, to perform piping with the shortest distance, and to simplify the work. It is another object of the present invention to provide a valve drive device in which the joint structure is reduced as much as possible and the pipe resistance loss is reduced.

[0011]

In order to achieve the above-mentioned object, the present invention is to connect a piping system between a booster that sends out pressurized oil and a cylinder that opens and closes a valve with the oil. A valve drive device comprising a speed control valve for adjusting the opening / closing speed of the valve in the system, wherein the speed control valve is a right-angled valve, and at least a pipe connected to the entrance and exit of the cylinder. It was mounted on one side and the amount of flowing oil was adjusted to adjust the operating speed of the cylinder. In this case, it is preferable that the speed control valve is directly bonded to at least one of the entrance and exit of the cylinder.

[0012] Further, the speed control valve is of a right-angle type, and is mounted on a pipe for delivering oil of the booster,
The operating speed of the cylinder may be adjusted by adjusting the amount of oil sent from the booster. In this case, it is preferable that the above-mentioned speed regulating valve is directly mounted on the oil outlet of the booster. Furthermore, the above-mentioned speed regulating valve is
It is preferable that the valve has a function that can be closed on the non-speed adjusting side.

[0013] Since the speed control valve connected to both or one of the inlets and outlets of the cylinder is a right-angled type, even if a pipe joint for mounting the speed control valve is included, the speed control valve is incorporated between the pipes and has a length. Short, long and does not require a large mounting space. Also, the assembling work is easy. In particular, if the speed control valve is directly mounted at the entrance and exit of the cylinder, no piping or fittings are required between the cylinder and this speed control valve.
Eliminates the need for long and wide mounting space. Further, the assembling work is further facilitated.

Therefore, it is not necessary to forcibly reduce the size of each device and piping in the piping system, and the piping system is not made inefficient and the assembling work is not troublesome. This does not increase the size of the entire valve driving device even if the operating oil pressure increases and the speed adjusting valve, other devices and piping increase, and the curvature of the curved pipe increases.

In the case where the speed control valve is mounted on a pipe for sending out oil from the booster and the amount of oil sent from the booster is adjusted to adjust the operating speed of the cylinder, the speed control valve is also a right angle type. Therefore, a long and wide mounting space is not required similarly to the above. Also, the assembling work is easy. In particular, if the speed control valve is directly mounted on the oil outlet of the booster, a longer and wider mounting space is not required as described above. Further, the assembling work is further facilitated.

The right-angled speed control valve has a structure in which the flow in one direction of the oil flowing therein is adjusted, and the flow in the other direction is not restricted without restricting the flow in the other direction.
It is suitable for adjusting the operating speed of the cylinder by adjusting the outgoing flow without restricting the incoming flow at the inlet / outlet of the cylinder, or adjusting the amount of oil to be sent out at the outlet of the booster. In addition, since this speed control valve can be closed in both directions, it can also be used as a close valve.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 6 in a circuit diagram (FIG. 7) for explaining a valve driving device according to the present invention. 1 and 2 are partial side views partially showing a state in which a right-angled speed control valve is directly attached to one of the inlets and outlets of a cylinder, and this speed control valve is connected to other devices by piping. FIG. 3 is a partial plan view when viewed from above. The description of FIG. 7 is omitted from the above description.

1 and 2, reference numeral 1 denotes a cylinder, 2
Is a right-angled speed control valve, 3 is another device, and 4 is a pipe connecting the speed control valve 2 and another device 3. 1 and 2
As shown in the figure, since the speed control valve 2 is a right-angled type and is directly mounted on the cylinder 1, the mounting of the speed control valve 2 on the cylinder 1 and the piping 4 connecting the speed control valve 2 and another device 3 are not necessary. It is extremely compact, so that the entire valve drive is also compact and does not require a long and wide mounting space. Further, these assembling operations are easy.

FIG. 3 is a longitudinal sectional view of the speed control valve 2 shown in FIGS. 1 and 2, wherein 11 is a valve body, 12 is a valve, 1
3 is a valve stem, 14 is a spring, and the valve element 12 is a valve body 11
Of the valve seat 11a. Connection port 11 of valve body 11
b is directly attached to the entrance and exit of the cylinder 1 as shown in FIG. 1 and FIG. 2, and the other connection port 11c is connected to another device 3, for example, the switching valve 55 in FIG. ing.

When pressurized oil (oil pressure) from the booster flows into the connection port 11c via the pipe 4 by the action of the switching valve 55, the valve 12 is compressed and depressed by the spring 14, and the oil is moved to the valve seat 11a and the valve seat 11a. The air flows into the cylinder from the connection port 11b through the space between the terminals 12, and the cylinder is operated.

FIG. 4 is a partial sectional view showing the speed control valve 2, in which the valve 12 is pushed down by a distance l. In the case where the opening area between the valve seat 11a and the valve seat 12 that is generated when the valve head 12 is pushed down by the distance 1 is equal to the flow passage area defined by the inner diameter d of the valve seat 11a, π / 4 · d ² = π ・ d ・ l
And l = d / 4.

Next, the connection port 1 is operated by the operation of the switching valve 55.
When 1c is connected to the oil tank and becomes almost atmospheric pressure, the oil in the cylinder tries to flow into the connection port 11b due to the hydraulic pressure acting on the opposite side of the cylinder, but in the state shown in FIG. The connection port 11 is in contact with the seat 11a.
It cannot flow toward b.

As shown in FIG. 3, since the male thread 13a provided on the valve rod 13 is screwed into the thread 15a to be provided on the cap 15 assembled to the valve body 11, the handle 16
When the valve stem 13 is pulled out by turning, the valve 12 hooked to the valve stem 13 via the steel ball 17 is pulled down, and a gap is generated between the valve seat 11a and the valve stem 12, and the connection port 11b is opened. Oil flows to the connection port 11c.

FIG. 5 is a partial sectional view showing the state of the speed control valve 2 at this time, and the valve 12 is lowered by a distance m. When it is desired to adjust the opening / closing speed of the valve, which is the operating speed of the cylinder, by adjusting the amount of oil flowing out of the cylinder by the distance m by which the valve 12 is pulled down, and to adjust only the one-way operation of the cylinder, The speed adjustment valve 2 may be provided only on the side where oil is discharged from the cylinder in the direction.

The oil flow from the connection port 11b to the connection port 11c is closed as shown in FIG. 3 if the valve rod 13 is screwed in until the above-mentioned distance m becomes zero. When the valve rod 13 is further screwed in so that the distal end portion 13b of the valve rod 13 comes into contact with the inner bottom surface 12a of the valve element 12, the valve element 12 is brought into a closed state in which the valve element 12 cannot be pushed down even if hydraulic pressure is applied to the connection port 11c. FIG. 6 is a partial cross-sectional view showing this state of the speed adjustment valve 2.

That is, the speed control valve 2 is a right-angled valve. In the state shown in FIG. 5, the speed control valve 2 adjusts the flow rate in one direction and does not limit the flow rate in the other direction.
In the state shown in (1), the structure is such that the flow in the other direction can be closed.

The speed adjusting valve 2 shown in FIG. 3 is connected to the oil outlet of the booster in FIG. 7 or a pipe connected thereto, and the amount of oil flowing therethrough is adjusted to adjust the operating speed of the cylinder. You can also. In this case, the valve rod 13 can be manually closed by screwing.

As in the case of the speed control valve 2, when the manual on-off valve 58 is formed in a right angle and is directly attached to at least one of the entrance and exit of the booster 51, the same operation and effect as described above are exhibited.

[0029]

As described above, the valve driving apparatus according to the present invention is compact, requires a small mounting space, is easy to assemble, and further simplifies the piping, thereby reducing the pressure loss. At the same time, the number of pipe joints can be reduced, so that there are fewer leakage points, and further, there are excellent effects such as cost reduction and improvement in performance and reliability.

[Brief description of the drawings]

FIG. 1 is a partial side view showing a part of an embodiment of a valve driving device according to the present invention.

FIG. 2 is a partial plan view of FIG. 1 as viewed from above.

FIG. 3 is a longitudinal sectional view of the speed adjusting valve shown in FIGS. 1 and 2;

FIG. 4 is a partial sectional view for explaining the operation of the speed adjusting valve shown in FIG.

FIG. 5 is a partial sectional view for explaining the operation of the speed adjusting valve shown in FIG. 3;

FIG. 6 is a partial cross-sectional view for explaining the operation of the speed adjustment valve shown in FIG.

FIG. 7 is a circuit diagram showing an example of a valve driving device used for operating a shutoff valve and a discharge valve, and is a circuit diagram for explaining a conventional example and the present invention.

[Explanation of symbols]

 1 Cylinder 2 Speed control valve 4 Piping

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sadayuki Nakanishi 1-32-11 Shinmachi, Nishi-ku, Osaka-shi, Osaka Prefecture Kitz Osaka Branch Office (72) Inventor Yoshiharu Sato 2040 Nagasaka Kamijo, Nagasaka-cho, Nagakoma-gun, Yamanashi Prefecture Kitz Nagasaka Factory Co., Ltd. (72) Inventor Akio Fukunaga 1-32-11 Shinmachi, Nishi-ku, Osaka-shi, Osaka Kitz-Osaka Branch Office

Claims (5)

[Claims] 1. A piping system is connected between a booster for delivering pressurized oil and a cylinder for opening and closing a valve with the oil, and a speed adjusting valve for adjusting the opening and closing speed of the valve is provided in the piping system. A valve drive device, wherein the speed control valve is a right-angled valve, and is mounted on at least one of the pipes connected to the inlet and outlet of the cylinder, and adjusts the amount of flowing oil to adjust the operating speed of the cylinder. A valve drive device characterized in that the pressure is adjusted. 2. The valve driving device according to claim 1, wherein the speed control valve is directly mounted on at least one of the entrance and exit of the cylinder. 3. The operating speed of the cylinder, wherein the speed adjusting valve is a right-angled valve, which is mounted on a pipe for sending oil from the booster, and adjusts an amount of oil sent from the booster. 2. The valve driving device according to claim 1, wherein the pressure is adjusted. 4. The valve drive device according to claim 3, wherein the speed control valve is directly mounted on a port of the booster for delivering oil. 5. The valve driving device according to claim 1, wherein the speed adjusting valve has a function of closing the non-speed adjusting side.