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A jacking system for tanks

理论起重量： 165KN
额定起重量： 160KN
额定油压 : 16MPa
液压行程： 100±3mm
下滑量： ≤5mm
自量： ≤37kg(其中下卡头（8kg）
油咀规格：

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Description

Main structure & Working principle
(1). The picture (Ⅱ) is the drawing of the jack
(2). Working principle
When you use the jack, you should put the lifting rod into the jack to make the two fixture blocks (up and down) work. When the pump start working, the oil will enter the cylinder body from the under nozzle. The upper clip can automatically lock the lifting rob and the next clip is losing at this time. Under the oil pressure, the lifting rob will be lifted. The rod will stop lifting when the pump stops supplying fuel after the piston finishing a stroke. The lifting process is finished. When the pump returns oil, the oil will enter the cylinder body from the upper nozzle. At this time, the follow clip will lock the lifting rob. Under the oil pressure also, the piston will backhaul and the hydraulic oil will be released from the down nozzle. After they finishing a part of work, the pump will stop supplying oil and the two clips (up and down) will loosen. Then you should put rob down or put it out. Repeat the cycling indefinitely, until the end of the entire work.
3. Maintenance & Attention
(1). Before constructing, check and maintenance the jack. Make sure the hydraulic parts not leak oil. Ensure the clips be in good function. Keep the whole machine be in good working order.
(2). Before you install the lifting rob, you should make sure the jack be in right working station (i.e. the nuts of clips screwed in appropriate level).
Attention the rob is in a direct line with the jack when the clips reset. And the jack will work.
(3). Don’t bring the muddy water to the pipes in case damaging the jack.
(4). Don’t overload.
(5). You can take artificial method to pull the rob out. In the beginning, make the jack be in the lifting. But at this time, you should lower the oil pressure. And then loosen the follow clip. When the jack finishes the stroke and the pressure is 5-6Mpa, you can loosen the upper clip. The rod can be pulled out.
(6). According to the local conditions, you decide to use N32# Ordinary Hydraulic Oil or Anti-wear Hydraulic Oil. Not allow mixing different kinds of hydraulic oil to use.
(7). When you finish a project, you should pay attention to cleaning and maintaining the jack promptly. Especially you should clean the attachments around the fixture blocks. If the fixture blocks are badly damaged, you should change one. And the replaced jack should be restored timely.

Failure	Possible cause	Method
The jack can not lift or the stroke cannot reach	1. the lifting rob is local deformation or leans	a. shake or liberate the rob before lifting b. change or straighten the rob
	2. the fixture blocks are badly worn or the bases are damaged or the springs of blocks are lost and tired	change the fixture blocks or bases or springs
	3. retracting spring is damaged or badly disfigured	change the retracting spring
	4. fuel starvation	adjust the pressure of the pump
	5. overload	light load
oil impregnate or oil leakage	1. the sealing members are damaged or badly worn or worn out	change the sealing members
	2. the cylinder body napping	repair or change the body
	loose connections or the sealing members are damaged	screw connections or change sealing members
quick couplers are leaking oil	the connects or the O-rings are damaged	change the connects or O-rings

5. Possible breakdown & Processing method
6. Vulnerable parts & Size
(1). Sealing member
a.　 O-ring　　Φ320×5.7
b.　 O-ring　　Φ16×2.4 or Φ26×2.4 ( all used for quick coupler )
c.　 KYD320×15
d. 　Kyd 150×7.5
(2). Spring: the little spring of the fixture block
(3). The fixture block: installed in the clips (up and down)