Name: Oil Quick Open Closure
Availability: InStock

Description

Installation

Initial Installation

The initial installation of Oil Quick Open Closure shall be carried out according to the following requirements:

The inner diameter of the quick opening closure is consistent with the inner diameter of the equipment. The circumferential seam alignment clearance is uniform. The difference between the maximum and minimum alignment clearance is ≤ 1.0mm. And the alignment misalignment is in accordance with table 1 of GB150.4-2011 standard.
Before it is assembled with the equipment cylinder, the welding type must be determined first.
Before welding the quick opening closure to the equipment cylinder, please carefully read the deformation control in this manual.

Disassembly of Head Cover

When the head cover needs to be removed for assembly and maintenance, the following procedures shall be followed:

Open the head cover according to 3.0 of this manual;
As shown in Figure 1.0, rotate the head cover by 180 ° and pad it firmly to prevent people from being injured by tilting. Then remove the bolt at the lower end of the vertical shaft. And remove the nut at the center of the hand wheel. And remove the hand wheel, loosen the guide bolt, with the cooperation of the crane. Remove the rotating arm, vertical shaft, and its connected parts, mark them, and keep them properly.
With the cooperation of the crane, remove the head cover and other parts.

Welding and welding deformation control

Welding deformation can be caused by weld shrinkage or improper welding operation during welding. In order to prevent and reduce welding deformation. The following provisions must be observed when assembling and welding the quick opening blind plate with the equipment cylinder:

The alignment clearance shall be uniform, and the difference between the maximum and minimum alignment clearance shall be ≤ 1.0mm;
The alignment misalignment shall comply with the provisions in Table 1 of gb150.4 standard.
Before welding, preheat the welding groove at 80 ~ 100 ℃ or according to the welding process regulations;
During welding, a small diameter electrode must be used. And the welding shape must be controlled by small current, symmetrical welding, and multi-layer welding. Otherwise, the head cover may not be opened and closed. This is very important.
The weldments on the equipment barrel shall be kept away from the circumferential weld between the quick opening plate and the equipment barrel as far as possible.

Suggestions on post weld heat treatment

When heat treatment is carried out for the circumferential weld between the quick opening blind plate and the equipment barrel. The local heat treatment shall be adopted as far as possible.
If the overall heat treatment is required in the manufacturing technical requirements of the general drawing of the equipment. The sealing surface must be protected with rock wool, and aluminum silicate. Or other thermal insulation materials to prevent its excessive oxidation from affecting the sealing performance of the quick opening blind plate;
The heat treatment process shall be carried out in strict accordance with Article 8.2 of GB150.4 or ASME standards, or the mature heat treatment process of the heat treatment manufacturer.
Note: Remove all sealing rings before heat treatment; After heat treatment, the sealing surface shall be slightly wiped clean with a fine emery cloth and evenly coated with lubricating grease, glycerin, or antirust grease

Coating

Before painting the quick opening blind plate, the safety bolt, locking plate, and sealing ring must be removed, and all sealing surfaces, internal and external threads, bolts and nuts, welding grooves, and electroplated parts must be carefully protected to avoid affecting the assembly tolerance, avoiding sandblasting and paint entry, and ensuring the beautiful appearance of the quick opening closure.

Reassembly of head cover

When reinstalling the head cover, proceed as follows:

Firstly, all sealing surfaces shall be protected against corrosion. See the maintenance section at the end of this manual for specific operations.
With the close cooperation of the crane, align the shaft hole stably and quickly install the vertical shaft assembly in place.
Install the hand wheel and the bolt at its center, and install the bolt at the lower end of the vertical shaft.
Turn the rotating arm back to 180 ° to align the cylinder flange, and rotate the hand wheel to lower the head cover to the bottom.
Insert the force application rod into the support and turn it counterclockwise to the limit pin.
Install the safety bolt and safety plate and lock the quick opening blind plate.
At last, conduct 2 ~ 3 opening and closing tests and fine-tune the discomfort;

Operation

Opening of head cover

Before opening the head cover, be sure to confirm that the equipment has been vented and blown down. And be sure to follow the safe operating procedures.
Loosen the safety bolt. If there is residual pressure in the equipment, it will leak through the safety bolt relief tank. At this time, screw back the safety bolt and lock it, recheck whether the vent valve and blowdown valve are open. And wait for the equipment to be completely vented and blow down.
When it is determined that there is no residual pressure in the equipment, the opening operation can be carried out. The operation procedure is shown in Figure 1.0:

1) unscrew the safety bolt and remove the safety plate.

2) Insert the force adding rod into the support, and rotate the force adding rod to the limit pin according to the opening direction. And then take out the force adding rod. (if the head cover does not open for a long time, resulting in difficulty in rotating the force adding rod. First screw the sta with a wrench to loosen the head cover, and then rotate the force adding a rod to open it). 4） Rotate the hand wheel with both hands to lift the head cover out of the barrel flange. 5） Push the rotating arm to rotate ≥ 100 ° until it does not
affect the replacement of equipment internals, and then fix the head cover.

Close and locking of head cover

Firstly, before closing the head cover, the sealing surface and sealing groove must be thoroughly cleaned and wiped. And no rust or other sundries affecting the sealing of quick opening closure are allowed;
Wipe the sealing ring clean and check its surface for cracks, scratches, permanent deformation, bulging chemical damage, and other defects. No matter what kind of defects are found, the sealing ring must be replaced;
Apply a layer of antirust grease evenly in the sealing groove and on the sealing surface
Carefully install the sealing ring into the sealing groove.
Note: first install the 12 o’clock and 6 o’clock directions and press and hold. And then install 0 at 3 o’clock and 9 o’clock directions.
Turn the hand wheel to lower the head cover to the bottom;
Insert the booster rod into the support and rotate it clockwise to the stop pin
At last, install the safety plate and safety bolt, and tighten the safety bolt. Attention during operation:

1) The safety bolt must be screwed in vertically without inclination or force. 2) When tightening the safety bolt, do not use too much force.

Storage

If the oil quick opening closure needs to be stored, even if the storage time is short. It is necessary to remove the sealing ring. Thoroughly clean and wipe the sealing groove and sealing surface, and evenly apply anti-rust oil. And then reinstall the sealing ring into the sealing groove. Then wrap the oil quick opening closure with a plastic cloth and put it into the packing box for storage. Quick opening closure must be stored indoors. If the air humidity in the storage environment is high, desiccant shall be considered moisture-proof. The storage life of the rubber seal ring is 2 years. If it is re-examined, no problems can be found. And the storage period can be extended for 1 year.

The storage conditions of rubber sealing rings are as follows:

Temperature: the storage ambient temperature shall not exceed 25 ℃. And the low temperature has little effect on the rubber
Light: avoid direct sunlight and strong ultraviolet radiation. And keep it in an opaque box.
Oxygen: the sealing ring shall be packed to avoid air circulation.
Deformation: the storage environment of the sealing ring shall be loose enough to avoid extrusion by external force and mutual extrusion. Other storage methods can also be used. Such as hanging. But a little can not be hung. The hanging point should be smooth and free of convex and sharp points.