A kind of anti-leakage device of hydraulic cylinder
The utility model is related to materials for wall product stacking machine tong lifting hydraulic cylinder technical field, specifically one
Plant the anti-leakage device of hydraulic cylinder.
Hydraulic cylinder is widely used in the industrial production as the action executing element in hydraulic system.Hydraulic cylinder is continuous
During stretching, retraction, there is relative motion between piston rod and piston rod packing, especially in installment state vertically downward
Under, during piston rod dynamic sealing slowly abrasion, seepage fluid is often flowed in equipment, has a strong impact on equipment cleaning fortune
OK, hydraulic cylinder premature failure and frequently maintenance replacing are caused.In order to avoid dynamic sealing leaks at hydraulic cylinder piston rod, prior art
Also there is the structure using two seals, the purpose of such a structure is to cause hydraulic cylinder direct after avoiding first of dynamic sealing failure
Failure.The problem of this structure is present be：If first of dynamic sealing works well, second dynamic sealing is in insufficient lubrication
State and premature deterioration, when first of dynamic sealing failure, second dynamic sealing does not have sealing function yet；, whereas if the
One of dynamic sealing effect is not so good, then second dynamic sealing is directly in working condition, does not just have the standby work for preventing from leaking
Utility model content
There is easily directly failure and do not have sealing and make in the sealing structure at above-mentioned existing hydraulic cylinder piston rod
With the problem of, the utility model provides a kind of anti-leakage device of hydraulic cylinder.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of anti-leakage device of hydraulic cylinder, the device is provided with cylinder body, guide pin bushing, card key, piston rod, first dynamic sealing, the
Two road dynamic sealings, first of static seal and second static seal, the guide pin bushing are arranged in cylinder body and consolidated by card key and cylinder body
Fixed connection, is sealed between piston rod and guide pin bushing by first of dynamic sealing and second dynamic sealing, between cylinder body and guide pin bushing
Sealed by first of static seal and second static seal, leading between first of dynamic sealing and second dynamic sealing
Inner surface is covered provided with annular collection trough I, is set on the guide pin bushing outer surface between first of static seal and second static seal
There is annular collection trough II, through hole I is provided between annular collection trough I and annular collection trough II, it is corresponding with annular collection trough II
Cylinder body is provided with through hole II, and the outside of through hole II is connected with joint, and joint is connected by drainage tube with leakage of oil collection vessel.
Switch valve is provided between the joint and drainage tube.
The beneficial effects of the utility model：
The anti-leakage device of hydraulic cylinder that the utility model is provided, passes through leading between twice dynamic sealing and twice static seal
Set sets annular collection trough respectively on surface, and sets between two annular collection troughs through hole, and with guide pin bushing outer surface
Set between through hole, two through holes to be connected and collect by drainage tube and leakage of oil on the corresponding cylinder body of annular collection trough and hold
Device is connected；During slowly being worn and torn in piston rod packing, slight leakage of oil can be avoided, which to flow in equipment, to be influenceed
Equipment cleaning is run, while greatly prolonging sealed service life, extends maintenance cycle；And can find that hydraulic cylinder sealing loses in time
Failure is imitated, accomplishes to prepare in advance, accurate maintenance.
Brief description of the drawings
Fig. 1 the utility model structural representations；
Fig. 2 the utility model partial structurtes enlarged drawings；
Reference：1st, cylinder body, 2, guide pin bushing, 3, card key, 4, piston rod, 5, first of dynamic sealing, 6, second move close
Envelope, 7, first of static seal, 8, second static seal, 9, joint, 10, switch valve, 11, draw oil pipe, 12, leakage of oil collects and hold
Device, 13, annular collection trough I, 14, annular collection trough II, 15, through hole I, 16, through hole II.
The utility model is further elaborated with reference to embodiment.
As shown in the figure：A kind of anti-leakage device of hydraulic cylinder, the device is provided with cylinder body 1, guide pin bushing 2, card key 3, piston rod 4, the
One dynamic sealing 5, second dynamic sealing 6, first of static seal 7 and second static seal 8, the guide pin bushing 2 are arranged in cylinder body 1
And be fixedly connected by card key 3 with cylinder body 1, pass through first of dynamic sealing 5 and second dynamic sealing 6 between piston rod 4 and guide pin bushing 2
Sealed, sealed between cylinder body 1 and guide pin bushing 2 by first of static seal 7 and second static seal 8, described first
The inner surface of guide pin bushing 2 between dynamic sealing 5 and second dynamic sealing 6 is provided with annular collection trough I 13, first of static seal 7
The outer surface of guide pin bushing 2 between second static seal 8 is provided with annular collection trough II 14, and annular collection trough I 13 is collected with annular
Through hole I 15 is provided between groove II 14, the cylinder body 1 corresponding with annular collection trough II 14 is provided with through hole II 16, the through hole I 15
The same side of cylinder body 1 is arranged on through hole II 16, the outside of through hole II 16 is connected with joint 9, and joint 9 is by drainage tube 11 with oozing
Leakage oil collection container 12 is connected；Switch valve 10 is provided between the joint 9 and drainage tube 11.
The anti-principle leaked of hydraulic cylinder is as follows：When hydraulic cylinder starts to come into operation, it is necessary to by drain path to first
Annular collection trough filling lubricating oil between road dynamic sealing 5 and second dynamic sealing 6, so that second dynamic sealing 6 lubricates well.
In use, when first of dynamic sealing 5 is leaked, leakage fluid can be by the annular collection trough I of the inner surface of guide pin bushing 2
13 through holes I 15 flowing on guide pin bushing 2, and the annular collection trough II 14 of its outer surface is flow to by guide pin bushing 2 through hole I 15, so
External lug 9 is flow to by the through hole II 16 on cylinder body 1 afterwards, and by switch valve 10, draw oil pipe 11 and flow to leakage of oil and collect appearance
Device 12, effectively prevent slight leakage of oil and flow in equipment influences equipment cleaning operation, while drawing oil pipe 11 by close observation
In fluid leak magnitude, so as to judge the abrasion condition of first of dynamic sealing 5 on hydraulic cylinder, and then judge whether to need more
Change.When leakage is slight, spare part can be prepared in advance and used for changing.When seepage is more serious, switch valve 10 can be closed
Close, second dynamic sealing 6 is come into operation, it is ensured that the normal of hydraulic cylinder is used, and is extended maintenance cycle, be substantially prolongs sealing
Service life.Once leaking during being continuing with, then whole dynamic sealings are changed immediately.
Above-mentioned all parts constitute the utility model and be able to can avoided light during piston rod packing is slowly worn and torn
Micro- leakage of oil, which is flowed in equipment, influences equipment cleaning operation, while greatly prolonging sealed service life, extends maintenance cycle.
And hydraulic cylinder sealing failure of removal can be found in time, accomplish to prepare in advance, accurate maintenance.