KR19990007012U - Check Valve Counter-weight Device with Automatic Positioner - Google Patents

Abstract

The present invention relates to a check valve counter-weight device using an automatic position adjuster that automatically adjusts a weight position installed on a lever of a multi-tight butterfly type check valve according to an operating condition and a valve state using a hydraulic cylinder.

To this end, the present invention is to install a counterweight on the valve shaft through the lever to facilitate the closing of the disk in the multi-tight butterfly type check valve so that the valve disk acts in the open direction from the no-load state due to the double eccentricity It provides a device that automatically adjusts the weight position according to the operating conditions and the valve state by using a hydraulic cylinder.

Description

Check Valve Counter-weight Device with Automatic Positioner

The present invention provides a check valve counter-weight device using an automatic position controller that automatically adjusts the weight position installed on the lever of a multi-tight butterfly type check valve to a hydraulic condition using a hydraulic cylinder. It is about.

In general, the CHECK VALVE is designed to open automatically by the increase of fluid at the start of blowing and to close automatically by the decrease of fluid at the time of blowing.

That is, when no load is applied to the valve disc DISK in the opening direction torque, a counter-weight counterweight is applied to the end of the valve shaft to overcome the friction force between the torque and the sealing seal. It is designed so that the valve closes completely under no load and opens slowly as the fluid increases by installing it through the lever.

In such a large check valve, the balance of forces related to wind pressure, bearing friction, disk weight, counterweight, etc. is important for smooth valve operation. If this force is not balanced, bumping between the disc and the seat of the valve body (SEAT) occurs, or sticking occurs during the opening and closing of the valve.

At this time, the position of this weight is adjusted and bolted so that the disk with the self-load torque of the double eccentric disk is completely closed under no load, and the elements of the valve are deformed by thermal expansion and contraction after a long operation. And shaft brush deformation, oxidation by condensation, etc. cause problems in valve operation.

In addition, the valve shrinkage and oxidation of the brush, the oxidation of the disk seat or the valve body seat due to the condensate, as a rule, the sticking occurs at any point of the valve closing and opening process.

As described above, even if the air volume increases due to sticking between the disc seat or the valve body seat, or sticking between the valve shaft and the brush, the valve may not be opened even if the air volume decreases during operation. do.

If a change in the state of the valve causes a problem in the operation of the valve, it is necessary to readjust the position of the weight on the lever that is initially set to smooth the operation of the valve.

1 is a counter-weight stereogram and hydraulic sequence diagram according to the prior art.

In the actual diagram of the counter-weight, a weight fixing groove 9 is formed in the lever 6 of the counter weight 7 at regular intervals to move the position of the weight 7 to a position where the valve operates smoothly, and the bolt 10 It is supposed to fix it.

In addition, the operation of the hydraulic sequence diagram is as follows.

In normal operation, close the stop valves ⓐ and ⓑ and open the throttling valve ⓣ. When the valve is closed due to the decrease in the air flow, the oil is moved from the upper cylinder to the lower cylinder by the piston through the throttling valve, and when the valve is opened, the lower oil moves to the upper cylinder.

In the event of an emergency such as a valve stuck, the throttling valve is closed and the stop valve ⓐ ⓑ is opened.

According to the prior art as described above, the wind pressure decreases when the valve is closed in accordance with the decrease in the air flow while the rotation moment of the counter weight increases, on the contrary, the wind pressure increases when the valve is opened due to the increase in the air volume.

On the other hand, the rotation moment of the counterweight is reduced to smooth the valve operation by adjusting the position of the disc and the valve seat. However, as described above, the position of the weight is not adjusted for reasons of manpower, time, and equipment, but only the valve is fixed. Each time the operator forcibly opens or closes the valve using the hand pump device on site, taking only temporary measures.

In addition, in order to fit the counter weight according to the valve state, the bolts need to be unwound and the weight moved to a desired position. However, the valve is large, which requires a lot of manpower and equipment.

Therefore, rather than resetting the weight position to normalize the operation of the valve, each time the valve is stuck, the driver is forced to open or close the valve by using the hand pump device at the sage. The current method requires the counter weight to be moved at regular intervals. There is a problem that can not be correct correctly.

Accordingly, the present invention is to solve the above problems, the device to automatically adjust the position of the weight by using the hydraulic actuator installed on the lever according to the state of the valve to operate the check valve accurately and efficiently to start the air blowing or the valve at the time of blowing It is an object of the present invention to provide a check valve counter-weight device using an automatic position controller capable of preventing bumping of a disk and smoothly performing opening and closing operations of a valve.

1 is a counter-weight stereogram and a hydraulic sequence diagram according to the prior art.

2 is a schematic diagram of a check valve according to the present invention

3 is a counter-weight physical diagram and a hydraulic sequence diagram according to the present invention

Explanation of symbols on the main parts of the drawings

1: valve body 2: valve disc

3: body sheet 4: disc sheet

5: valve shaft 6: lever

7: weight 8: dash pot

9: Weight fixing groove 10: Weight fixing bolt

11: Hydraulic actuator for weight movement 12: Guide groove

13: Hand pump device

Ⓐ ~ ⓕ: Stop valveⓣ: Throttle valve

Check valve counter-weight device using an automatic position adjuster according to the present invention

Both ends of the valve disc are connected to the body seats fixed to both valve bodies installed at a predetermined distance, and are hinged by a shock absorbing dash port and a hinge shaft to a predetermined portion of the valve disc, and pivotally rotated on the hinge shaft. One end of the installed hinge bar is connected to one outer periphery of the double-shaft valve shaft, the other outer periphery of the valve shaft is provided with a weight via a hollow lever, the inside of the hollow lever according to the opening value of the valve It is characterized in that the hydraulic actuator for adjusting the distance is installed.

Hereinafter, a check valve counter-waiter device using an automatic position adjuster according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram of a check valve according to the present invention.

Reference numeral 1 denotes a valve body BODY, 2 denotes a valve disc DISK, and 3 denotes a body seat SEAT installed in the valve body 1 and in contact with the disc seat.

Next, reference numeral 4 denotes a disk seat installed on the valve disk 2 and in contact with the body seat 3, and 5 denotes a torque due to the disk being uncentered from the valve disk 2 and not loaded. Denotes the valve axis acting in the opening direction of the valve.

Next, a reference numeral 6 is connected to the valve shaft 5, one side is connected to the dash pot, the other side is to install a weight and the position of the weight is adjustable ( LEVER).

Next, reference numeral 7 is provided on the lever 6 to facilitate the closing of the valve because the valve shaft 5 is eccentric, and the position of the lever indicates a weight which can be adjusted according to the valve operating state.

Next, reference numeral 8 is installed to adjust the closing speed of the valve to absorb the impact of the disk and other elements, and is connected to the hand pump (HAND PUMP), the dashboard for the operator to open and close the valve forcibly in the field when the valve is stuck Indicates.

Next, reference numeral 9 denotes a weight fixing groove which is made at regular intervals in the lever to move and weight the weight to a desired position when the weight position is readjusted.

Next, reference numeral 10 denotes a weight fixing bolt for fixing the weight to the lever in the conventional check valve, and 11 denotes a weight moving hydraulic actuator connected to the weight to adjust the position of the weight.

Next, reference numeral 12 serves as a guide when adjusting the position of the weight, and a contact portion of the lever and the weight indicates a guide groove through which lubricant is injected, and 13 indicates a force that opens or closes the valve in an emergency such as a valve fixing. Device, a hand pump that adjusts the position of the weight for smooth operation in accordance with the valve condition.

Next, reference symbols ⓐ, ⓑ, ⓒ, ⓓ, ⓔ, ⓕ are used to forcibly open or close the valve when the valve is stuck, and also to adjust the position of the weight.

Next, the reference symbol ⓣ is a throttling valve, which controls the opening and closing speed of the valve to prevent the shock caused by the sudden closing or opening of the valve, and the L-stroke is normally used. The piston displacement of the cylinder for weight movement during operation is shown.

The operation of the check valve counter-weight device using the automatic position adjuster according to the present invention will be described.

The present invention is largely composed of a hydraulic cylinder, a lever, a weight, a hand pump device.

First, in normal operation, open the stop valves ⓒ, ⓓ, close the stop valves ⓐ, ⓑ, ⓔ, ⓕ, adjust the throttling valve ⓣ to control the closing speed of the valve, and The oil on the upper part of the dash port cylinder is moved by the piston to the lower part of the weight moving cylinder through the stop valve ⓒ to move the weight to the inside of the lever, and when the valve opens due to the increase in the air flow, the weight is moved to the outside of the lever. By keeping the rotation moment almost constant, the valve can operate smoothly and prevent bumping.

In addition, when the valve is stuck, the valve may be stuck for a long time by the expansion of the valve shaft brush, the shaft ring, or the shaft, causing the valve to stick, or when the valve is closed, the valve shaft brush or shaft ring is corroded by condensed water, or the disk seat and body seat are corroded. This may cause the valve to stick.

In this way, if the valve operation problem occurs due to a change in the state of the valve, the valve should be smoothly operated by repositioning the weight on the lever that was initially set. In the present invention, the position of the weight is automatically readjusted using the existing hand pump apparatus.

And, if stuck occurs during close operation, stop valves ⓐ, ⓑ, ⓒ, ⓓ are closed, open the stop valves ⓔ, ⓕ, and use the hand pump to move the weight zero position to the outside of the lever. Adjust until After adjusting the zero weight, close the stop valves ⓐ, ⓑ, ⓔ, ⓕ and open the stop valves ⓒ, ⓓ to return to normal operation.

In addition, the valve operates smoothly while the stop valves ⓐ, ⓑ, ⓒ, ⓓ are closed and the stop valves ⓔ, ⓕ are opened, and the weight 0 position is moved to the inside of the lever by using a hand pump. Adjust until

Likewise, when the zero weight adjustment is completed, close the stop valves ⓐ, ⓑ, ⓔ, ⓕ and open the stop valves ⓒ, ⓓ to return to normal operation.

According to the present invention, by adjusting the position of the weight installed on the lever according to the opening degree it is possible to prevent the bumping of the valve disc during the start of the air flow or the idle air, there is an advantage that can smoothly open and close the valve.

In addition, when adjusting the position of the weight by fixing the valve, it is possible to solve the manpower, time, and equipment problems by automatically adjusting the hydraulic pressure, unlike the existing one. There is an advantage that can be prevented.

Claims (1)

Both ends of the valve disc are connected to the body seats fixed to both valve bodies installed at a predetermined distance, and are hinged by a shock absorbing dash port and a hinge shaft to a predetermined portion of the valve disc, and pivotally rotated on the hinge shaft. One end of the installed hinge bar is connected to one outer periphery of the double-shaft valve shaft, the other outer periphery of the valve shaft is provided with a weight via a hollow lever, the inside of the hollow lever according to the opening value of the valve Counterweight of the check valve using an automatic position controller, characterized in that the hydraulic actuator for adjusting the distance is installed.