JPS601333Y2 - control valve - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a control valve that is installed and used in a narrow space, and allows adjustment of the alignment between the valve element and the valve seat to be easily performed from the outside while the piping remains in place. It is equipped with a mechanism.

Generally, on-off valves have a control mechanism attached directly to the valve stem, and the opening/closing operation is controlled mainly by pneumatic pressure, but this naturally increases the height from the center of the pipe to the top of the valve, which makes the installation difficult. It is difficult to install this type of control valve in a narrow space, and it is difficult to simplify the structure of the control mechanism. Therefore, when installing this type of control valve in the middle of piping, sufficient consideration must be given to the use of space. There must be.

Therefore, in order to make it possible to install the control valve in a location where sufficient height is not available, a control section for operating the valve stem is installed on the side of the valve body, and the operation of this control section is A configuration in which the valve stem is moved up and down using a lever is convenient as a valve to be installed in a narrow space because the overall height of the valve can be lowered to make it easier to operate.

Therefore, even when incorporating a valve into piping, scale etc. may adhere to the inside of the valve depending on the fluid being handled.
For example, if a valve is used under conditions where the temperature of the fluid frequently changes or where it is easily affected by external influences, it is necessary to ensure that the valve remains open for a long period of time and then attempts to close it. The reason for this is that foreign matter adheres to the valve seat and solidifies, so that even if you try to touch the valve to the valve seat normally, the two will not come into direct contact. This results in a state where the deposits are chewed, resulting in leakage.

However, even if it is found that the handled fluid is leaking from the outside in the control valve even after it is closed, there is nothing that can be done about automatic control valves during operation, so there is no problem in the work. The reality is that it is used as is.

The control valve of the present invention solves the above-mentioned problems, and even when it is installed in a pipeline, the contact state between the valve element and the valve seat at the time of valve closing can be corrected from the outside to normal contact. To provide a valve which has a function that allows the valve to be closed easily when it is closed by easily removing deposits on the valve seat surface.

The present invention is a spherical cylinder control valve, in which a control cylinder is disposed on the side of a valve body in parallel with the valve stem axis, integrally or integrally connected with a cover of the valve body, and the piston rod of the control cylinder is disposed in parallel with the valve stem axis. The protruding end and the protruding tip of the valve stem are movably connected by a lever whose main part is supported on a support that connects the valve box cover and the cylinder, and the tip of the valve stem has an annular ring around the tip. An operating ring provided with a groove is fixed, and a rotor with a lever end attached to the operating ring is engaged with the annular groove so that the operation of the cylinder is transmitted to the valve stem. A manually rotating handle fitting part was provided in the valve, and the valve element and valve stem were attached in a non-rotatable manner.

According to the valve of the present invention constructed as above, in normal conditions, by lowering the piston rod of the control cylinder, the valve stem is pulled up via the lever rod connected thereto, and the valve attached to the lower end of the valve stem is moved. The control cylinder installed on the side of the valve body allows the opening and closing operations to be performed by raising the valve to open the valve, and then lowering the valve stem to close the valve by reversely operating the control cylinder. By lowering the overall height of the valve, it is possible to incorporate it into the pipeline, and although the cylinder is attached to the side of the valve and it is tall in the width direction, it is automatically controlled with almost no strain on the piping and with a small occupied volume. This allows the valve to be installed without any problems even in confined spaces, and power is transmitted from the cylinder side that automatically controls opening and closing to the valve stem in a freely rotatable state via a link mechanism. The tip of the valve stem is in an open state, so if there is poor contact between the valve element and the valve seat during use, fit a separate handle or wrench directly onto the valve stem while the valve is closed. The valve element and valve seat can be rotated from the outside, and the valve element and valve seat can be adjusted to a state where they are in close contact, making it easy to eliminate fluid leakage, and automatic control with great practical effects. A valve is obtained.

The present invention will be described in detail below with reference to one embodiment. In FIGS. 1 to 4, 1 is a valve box with a globe valve structure, 2 is a valve box cover, 3 is a valve seat, 4 is a valve element, and 5 is a valve box with a globe valve structure. is the valve stem, and the valve 4
The operating ring 6 has a threaded portion 5' formed at its tip and an annular groove 6' around it, and is screwed into the operating ring 6. A rotary operation part 5'' is formed which protrudes upward from 7 and is cut into a rectangular shape to which a handle (not shown) or the like can be fitted.

Reference numeral 10 designates an air cylinder for control, whose head is formed on a support plate 9 that protrudes laterally from the upper end of the valve box cover 2 (above the figure), and which is parallel to the 5-axis axis of the valve stem at the side of the valve box 1. The tip of the piston rod 12, which is directly connected to the piston 11 inside the cylinder 10, penetrates the support plate 9 and projects to the outside, so that there is no space between the piston 11 and the inner surface of the support plate 9. A return spring 13 is inserted.

A cylinder cover 14 is provided with a control air inlet 15, to which a control air pipe (not shown) is connected.

Reference numeral 20 denotes a lever, the intermediate part of which is inserted between a pair of protrusions 17 protruding from the surface of the support plate 9, supported by a pin 18, and both the front and rear ends are bifurcated in a fork shape. hand,
The distal fork-shaped portion 21 is configured such that the operating ring 6 attached to the distal end of the valve stem 5 is accommodated inside, and the proximal end is fixed to the fork pieces 21', 21' of this fork-shaped portion to protrude inwardly. Each pin 23 is fitted with a rotating roller 24 in the form of a bearing, and the rotating roller 24 is symmetrically engaged in the annular groove 6' of the operating ring 6 fixed to the valve stem 5.

Also, the fork pieces 22', 22' of the rear end fork-shaped portion 22
In between, a roller 25 is supported by a pin 26, and this roller 25 is loosely inserted into and engaged with a support piece 16 attached to the tip of the piston rod 12 of the control air cylinder 10 and having a U-shaped side opening at the front. In this state, the valve rod 5 and the control air cylinder 10 are connected via the lever 20.

17' is a rotation prevention piece for the support piece 16, and 19 is a valve opening adjustment rod whose amount of protrusion into the cylinder can be adjusted by operating the handle 19' from the outside, and whose tip can adjust the amount of return of the piston 11. It's Nishide.

Since the present invention has such a structure, in order to open the valve under normal operating conditions, the supply of pressurized air into the air cylinder 10 is stopped and the inside of the cylinder is returned to atmospheric pressure.
The force of the return spring 13 acting on the piston 11 causes the piston 11 to move backward, and the rear end of the lever 20 is pulled down via the support piece 16 attached to the end of the piston rod 12, so that the tip of the lever 20 is lifted. The valve rod 5 is pulled up together with the operating ring 6 via rotating rollers 24, 24 attached to the fork pieces 21', 21' of the fork-shaped portion 21 at the tip thereof, and the valve element 4 is separated from the valve seat 3 to open the valve.

When closing the valve, pressurized air is sent into the air cylinder 10 to move the piston 11 forward, and the valve is quickly closed by performing the opposite operation to the opening operation.

The valve opening degree is set by protruding the valve opening degree adjusting rod 19 into the cylinder 10 to limit the amount of retraction of the piston 11.

The relationship between the movement of the piston rod 12 and the lever rod 20 is controlled by the roller 25 attached to the fork-shaped portion 22 at the rear end of the lever rod 20 fitting into the recess of the support piece 16. There are no problems.

Therefore, although the valve of the present invention has a configuration in which the control section and the valve main body are provided in parallel, and has the function of controlling the valve stem 5, the tip of the valve stem 5 is Since the valve is in the open state, if the valve is not properly closed due to foreign matter adhering to the valve seat 3 during a long period of operation, the tip of the valve stem 5 should be removed when the valve is closed. The valve element 4 is fixed with the valve stem 5 and key 8 by inserting a wrench or a handle with a square hole (not shown) into the rotating operation part 5'' and directly rotating the valve stem 5. Since the valve element 4 and the valve seat 3 are in contact with each other, a so-called sliding operation is performed by rubbing against each other, and foreign matter adhering to the surface of the valve seat 3 is removed to ensure the subsequent valve closing function. This allows the valve to be used normally without being disassembled.

During this operation, as mentioned above, the annular groove 6' is provided on the valve stem side for the connection mechanism with the control side for opening and closing the valve.
An operating ring 6 is attached, and the tip of the lever 20 engages a rotary roller 24 with an annular groove 6' of the operating ring 6 using fork pieces 21', 21' to rotate the valve stem 5. Since it is connected so that it can be moved freely, it does not cause any trouble to the control mechanism.

The present invention is not limited to the above-mentioned embodiments as long as it conforms to the spirit thereof, and any changes such as the operating section may be made within the technical scope of the present invention, and these belong to the present invention.

[Brief explanation of the drawing]

Fig. 1 is a partially vertical front view of an embodiment of the control valve of the present invention, Fig. 2 is a sectional view taken along ■-■ of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a main part of the control valve. It is an enlarged sectional view. 1...Valve box, 2...Valve box cover 3-Valve seat, 4...
・Valve element, 5... Valve stem, 5'... Threaded part, 5''...
Valve stem rotation operation part, 6... Operating ring, 6'... Annular groove, 8... Key 9... Support plate body, 10... Air cylinder, 11... Piston, 12... piston rod,
DESCRIPTION OF SYMBOLS 16... Holding piece, 17... Projection piece, 20... Leverage lever, 21.22... Fork-shaped part, 24... Rotating roller, 25... Ta-ra.

Claims (1)

[Scope of utility model registration request] In the spherical cylinder control valve, a control cylinder is disposed on the side of the valve body parallel to the valve stem axis, integrally or integrally connected with the cover of the valve body, and the piston rod protruding end of the control cylinder and The protruding tip of the valve stem is movably connected by a lever whose main body is supported on a support that connects the valve box cover and the cylinder, and an annular groove is provided around the tip of the valve stem. A rotor attached to the tip of a lever is engaged with the annular groove to transmit the operation of the control cylinder to the valve stem. A control valve characterized in that a fitting part for a rotary operating body is provided, and a valve element and a valve stem are attached so as to be non-rotatable.