Quick Opening Closure Manufacturer

Description

0. Introduction

The Quick Opening Closure Manufacturer is indispensable in oil and gas transmission pipelines and plays an important role in pipeline pigging. Compared with the traditional blind plate, the quick-opening blind plate has many advantages. Such as reasonable structure, good sealing performance, rapid opening, and closing, reliable performance, and convenient operation. The quick-opening blind plate includes clamp type, thread type, thread type, lock ring type, and so on.

1. Lock ring quick opening closure

1.1 sealing principle

The sealing ring is embedded in the sealing groove. After the blind door is closed, the sealing ring shall adhere to the tight cover under the action of certain pressure. So that an initial seal can be achieved. In the working state, the medium in the pipe enters the inner cavity of the sealing ring. Under the action of a high-pressure medium, the sealing ring will open and more closely adhere to the cover. The higher the pressure, the better the sealing effect. Since the sealing structure adopts self-tightening sealing. At this time, it has no pre-tightening force and pre-tightening torque. So there is no additional stress on the blind plate. And the sealing is reliable.

1.2 lock ring Quick Opening Closure Manufacturer structure

The structure of the lock ring quick-opening blind plate is complex. Wherein the locking disk is safe. When the pressure alarm bolt is not removed. At this time, the lock plate cannot be removed and the handle cannot rotate. The lock ring telescopic device is a crank slider mechanism. The expansion and contraction principle of the lock ring is when the operating handle is rotated. At this time, the guide column connected with the handle moves along the arc groove. This will change the distance of the lock block. Which in turn changes the circumference of the lock ring.

It can realize the expansion and contraction of the lock ring in the lock ring groove. When the handle is rotated clockwise, the lock block is pulled close. It rests in the lock ring groove to fix the blind plate. Rotate the handle anticlockwise, and the lock block faces away. And then the lock ring disengages from the lock ring groove. Release the blind door.

1.3 lock ring Quick Opening Closure Manufacturer safety device

The safety lock plate is used to fix the working position of the ring lock. That is, when the ring lock is close to the inclined surface of the simple ring groove, the safety lock plate is inserted between the two force arms. This can prevent the danger of radial displacement of the ring lock. Install a pressure alarm bolt on the safety lock plate. When we want to remove the safety lock plate, we must first remove the pressure alarm bolt. When loosening the bolts, as long as there is residual pressure in the equipment equipped with the ring lock type quick opening blind plate, the gas will be released from the special relief port of the pressure alarm bolt. It will sound to warn operators. This can also avoid the dangerous face caused by residual pressure when opening the blind plate.

1.4 opening and closing of lock ring quick opening blind plate

Before opening the lock ring quick opening the blind plate, it must be confirmed that the pressure in the container is completely released. Then separate it from the bolt hole and remove the lock block. One end of the universal handle is inserted into the hole of the lock ring drive arm. Rotate the handle counterclockwise. This retracts the lock ring into the lock ring groove. Pull the door opening lever outward. Thus, the opening operation of the lock ring quick opening blind plate is realized.

When closed, one end of the handle is inserted into the hole of the lock ring drive arm. We rotate the handle clockwise. This allows the locking ring to extend into the locking ring groove. It pushes the operating lever inward to close the door. This allows the door to fully enter the neck of the lock ring quickly opening blind. Release the locking ring. This causes the locking ring to snap into the locking ring groove. Let’s pull the lever back a few times. This can confirm whether it is completely stuck in the groove; Install the lock stopper. Tighten the pressure alarm bolt. The closing operation is completed.

2. Related equipment of lock ring quick opening blind plate

The filter intercepts the solid impurities in the conveying medium through the stainless steel screen frame assembly. This is a piece of special equipment to ensure the normal operation of instruments and important equipment. The filter is composed of the vent, inlet, sewage outlet, outlet, blind plate, filter barrel, filter element, etc.

3. Typical case analysis

3.1 fault phenomenon

A natural gas booster station. Leakage occurs at the U-shaped seal of the lock ring quick opening blind plate and the O-shaped seal of the vent bolt. When preparing to open the blind plate to deal with the leakage, it was found that the locking device was stuck. Moreover, the lock ring cannot be ejected and it is difficult to open.

3.2 cause analysis

3.2.1 cause analysis of the opening difficulty
(1) Firstly, the blind plate has not been operated for a long time. Corrosion may occur;
(2) And then the lock ring part cannot be ejected. There may be impurities;
(3) The ring locking mechanism fails. And then rust and impurities may exist.

3.2.2 cause analysis of leakage at U-shaped seal

(1) It may be that too much butter is applied;
(2) The seal may be damaged or the sealing surface may be damaged.

3.2.3 cause analysis of leakage at O-type seal

The sealing ring or sealing surface may be damaged.

3.3 solutions

3.3.1 difficulty in opening

(1) Clean the rusted part after opening the blind plate. We should strengthen regular maintenance. Make a reasonable equipment maintenance plan. For the blind plate, use a jack, sleeper, and other tools to slowly press the protruding part. It also restores it to its original state:
(2) Slowly shake the handle back and forth. At the same time, we apply engine oil to lubricate the lock ring. Clean the impurities after opening the blind plate. Then fully lubricate and maintain;
(3) Lubricate the locking device with oil. Then slowly shake the handle. Clean the rust and impurities on the device after opening the blind plate. We can also remove it for cleaning and maintenance. In addition, when the vertical direction of the plate door and the flange is not aligned. Adjust the adjusting bolt until the center coincidence meets the requirements. It is difficult to open and close the blind plate due to the out-of-round flange inner diameter. At this time, we can only replace relevant accessories and reinstall them.

Quick Opening Closure Manufacturer

3.3.2 leakage of U-shaped seal

(1) Remove the original butter after opening the blind plate. Replace one sealing ring. Then we reapply a thin and uniform layer of butter;
(2) The sealing surface is slightly worn. We use fine sandpaper to polish. Then apply a thin layer of butter. In addition, when the damage degree is large, relevant parts shall be replaced. We ensure that the center of the panel door and the flange coincide. Then reinstall the sealing ring. Finally, we will deal with it according to the method in section 3.3.1.

3.3.3 o-seal leakage

The sealing ring or sealing surface is damaged. Replace the O-ring and deal with the impurities on the sealing surface. After the above treatment, the blind switch is normal without jamming. The position of the lock ring is restored and there is no leakage at the seal. This ensures the safe and stable operation of the station.

4. Maintenance method of lock ring quick opening blind plate

4.1 maintenance cycle

Check, maintain and maintain the blind plate every time it is opened. The blind plate without switch operation shall be maintained once every six months at most.

4.2 maintenance steps

• Firstly, we check the appearance of the blind plate. See if there is any scar on the surface. Check whether the components are deformed. Whether there are loose bolts or screws and the overall cleanliness.
• Open the blind plate and remove the seal from the door. Check the seal for damage and replace it if any. If not, the oil and other dirt on the top must be completely removed. The service life of the sealing ring is recommended to be 1 A.
• Check the groove of the sealing ring for rust and dirt. If there is, we clean it thoroughly with sandpaper or emery cloth. Wipe it with a clean cotton cloth.
• Check whether the contact surface between the door and the lock ring is clean and clean it if any.
• Check the inner surface of the flange. Usually, it has dirt or rust. They also need to be cleaned with sandpaper,. Let’s wipe it with a clean cotton cloth. The lock ring groove is usually dirty and needs to be cleaned. Otherwise, the installation of the lock ring will be affected.
• Carefully check the sealing surface for mechanical damage and corrosion. If the machine needs it, polish it.
• After cleaning. We apply grease to the sealing groove, lock belt groove, sealing surface, lock ring, the contact surface of the lock ring, and door. Apply a thin layer of butter evenly.
• Check the pressure alarm bolt gasket for damage. Replace if damaged. If not, clean the gasket and bolt hole. Apply a small amount of grease.
• Install the seal, paying attention to the installation direction. In addition, we will install at 12:00, 3:00, 6:00, and 9:00. Let’s press the perimeter in again
• Lubricate other movable or rotating parts with oil or grease.

5. Safety problems of lock ring quick opening blind plate

The safety locking device of the lock ring type quick opening blind plate significantly enhances its safety performance. This prevents the radial movement of the lock ring. It can also reduce the probability of the blind plate of the pressure switch. But when the pressure relief groove of the pressure alarm bolt is blocked or the discharge port is blocked. This method does not completely guarantee that the pressure in the container is zero. Therefore, the pressure alarm bolt can be completely removed to ensure that the pressure is zero. Prevent the ferrous sulfide in the container from burning and exploding in the air. Before fully opening the door, spray water into the container to absorb and dissolve ferrous sulfide.

6. Summary

At last, This paper introduces the principle and structure of the lock ring quick-opening blind plate. The common faults are analyzed and dealt with. When dealing with the leakage of the lock ring quick-opening blind the plate, comprehensive consideration must be given. Find out the reasons first, and then take targeted measures.

In a word, if you have any other questions, please contact our professionals to answer them for you.