CN104514831B

CN104514831B - Repairable gas spring capable of being freely inflated and having overload automatic protection function

Info

Publication number: CN104514831B
Application number: CN201410104009.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-20
Filing date: 2014-03-20
Publication date: 2017-05-10
Anticipated expiration: 2034-03-20
Also published as: CN104514831A

Abstract

The invention provides a repairable gas spring capable of being freely inflated and having an overload automatic protection function. The repairable gas spring consists of a cylinder body, a cylinder body front end, a cylinder body rear end, a piston module, a positioning part, a positioning tube, a rear cavity safety valve, an inflation one-way valve, a front cavity safety valve and a capillary tube. The cylinder body, the front end and the rear end can be dismounted, and maintenance is facilitated. The inflation one-way valve adjustable in pressure is arranged at the rear end and can achieve inflation and deflation. The inner cavity of the cylinder body is divided into a front cavity and a rear cavity by a piston, the front cavity is connected with the front end, the rear cavity is connected with the rear end, the front cavity and the rear cavity are communicated through the inflation safety valve (one-way valve) adjustable in pressure, and automatic pressure relief can be performed to reach safe set gas pressure. The positioning tube is fixedly connected with a piston rod, the positioning part is in threaded connection with the front end, and a convex groove of the positioning part is intermittently matched with a groove of the positioning tube to prevent the piston rod from rotating. Two rear rings matched with the piston rod, an oil-containing bearing, a front ring and a retainer ring are installed in the front end, gas leakage is prevented, and the piston rod guiding capacity of a bearing is improved.

Description

Can freely inflate and have the recoverable gas spring of automatic overload protection

Technical field

The present invention relates to a kind of gas spring can freely inflate, recoverable, relating particularly to one kind has overload automatic The safe gas spring of protection；Further, also relate to prevent piston rod main shaft opposing cylinder from making the rotation of coaxial inner conductor circumference With the gas spring for preventing moving piston bar dust or mechanical collision；Further, the outlet of piston rod opposing cylinder is also related to Place adopts multi-stage sealed and multistage guiding oiliness bearing, strengthens the reinforcement of gas in the jar external leakage ability and piston rod guidance capability Property gas spring；It is a kind of mechanical engineering aerodynamic force parts；Further, single or multiple gas springs are also related to Gas spring inflation check valve, the external integrated installation of one-way pressure relief valve and using method.

Background technology

Gas spring is that one kind can play the functional fittings such as support, buffering, braking, Height Adjustment and angular adjustment, extensively It is general to be applied to the fields such as Medical Devices, automobile, furniture, Weaving device, machine-building.Principle be filled with closed cylinder barrel it is lazy Property gas or oil gas mixture, make several times or tens times of cylinder interior pressure superatmospheric power, using the horizontal stroke of piston rod Sectional area realizes the motion of piston rod less than piston cross-section area so as to produce pressure differential.

Gas spring aerating industry slang is inflation.At present, the mode of inflation is front inflation and rear two kinds of inflation, is filled with pre- If after gas atmosphere, press-in steel ball closure is inflated referred to as after gas spring；After being filled with pre-set gas air pressure, dynamometry air pressure is not enough After be supplemented with, referred to as before gas spring inflate, inflation is between fairlead and piston rod by piston rod and cylinder barrel intersection Have a rest inflation.During inflation, need normally be inflated with special equipment and frock, can not adjust again substantially after the method inflation.Cause Percent defective that the operation and technique of inflation is caused is high, particularly initial workpiece and new product trial-production.It is not that at present gas spring is broken Can repair.

Several times or tens times normal atmospheric pressures of gas spring normal temperature lower cylinder body memory storage, according to thermodynamic (al) gaseous state side Journey P1*VI/T1=P2*V2/T2, temperature is raised in gas spring cylinder, the proportional pressure in the Gas spring cylinder body Increase, it may occur that explosion danger, just have the situation to explode in routine use gas spring device.At present, have in gas Body spring cylinder is additionally arranged at the bottom of the device of safety valve, and the relief valve device is to the pressure near the connection of gas spring cylinder bottom There is overload pressure defencive function in chamber, but to the pressure chamber piston other end cylinder interior pressure chamber No-mistake Principle pressure protecting function, Still there is explosion danger in gas spring；Further, the screwed hole or screw rod for needing is installed when gas spring bottom end has When, it is described when the gas spring bottom can be used to install area needed for the area of other accessories is installed less than the safety valve Safety valve cannot be installed and can not used.

When gas spring piston cylinder diameter is cylindric with the cylinder body contact surface for cylindric or movable piston, The piston at the volley without the external world limit its have mercy on described cylinder body axial line circle intervention when, the piston is in cylinder body When interior dynamic dynamic, the piston opposing cylinder that has an opportunity makees the rich circular motion of axial line.Usually, piston rod is fixed on piston, institute Piston rod is stated with the piston with central hub line, when the piston rotates, the piston rod makees the synchronous rotation of coaxial inner conductor Turn.Near and ground, the piston around the cylinder body make around coaxial centerlines circle when, the piston rod is also relative to cylinder body Make the relative circular movement of coaxial inner conductor, when the gas spring job requirement piston rod and cylinder body only make coaxial inner conductor straight line fortune Dynamic and circle when being prohibited, the gas spring device is prohibited from using.

Gas spring piston bar opposing cylinder exports matching part, is the weak position of gas spring.The outlet coordinates There is encapsulant at position, and the encapsulant does not leak for sealing the cylinder body inner high voltage gas, and piston rod is in motion process In, the piston rod and encapsulant phase mutual friction, further, the encapsulant is mutually rubbing with piston rod interval Wear the increase of bad when, when the encapsulant and piston rod interval increases to the gas in the jar and can leak, the cylinder body Inner high voltage gas leak outside release, when in the cylinder body gas pressure unload be depressed into normal pressure when, gas spring operational failure；The outlet Matching part, there is an oiliness bearing, and the oiliness bearing is used for the guiding of piston rod, the piston rod in motion process, because making During for the perpendicular external force of the axial line of the piston rod, the interval that the piston rod coordinates with the oiliness bearing is to increase Direction is developed, and the oiliness bearing guidance capability weakens, and further, the external force also increases the piston with the sealing The friction of material, further, the external force increased the interval that the encapsulant coordinates with the piston rod, accelerate gas Body spring works fail.At present, gas spring piston bar opposing cylinder outlet matching part, only one of which oiliness bearing, two Encapsulant, the outlet matching part is gas spring weak part, is the main thoroughfare that cylinder inner high voltage gas is leaked out, For the problems referred to above, the present invention increases oiliness bearing, two encapsulants, a back-up rings in the exit site, strengthens The guide function of oiliness bearing, also enhances the exit site and seals the cylinder body inner high voltage gas function, also reduces The security incident risk that the exit site causes because of the cylinder body high pressure gas leakage.

The content of the invention

The purpose of the present invention is：There is provided it is a kind of can conveniently, freely inflate, recoverable gas spring；A kind of cylinder body The gas spring of inner carrier two ends inner chamber of cylinder block pressure overload automatically unloading to safe pressure；One kind prevents piston rod main shaft relative Cylinder body makees the rotation of coaxial inner conductor circumference and the dust-proof gas spring of moving piston bar.

The technical scheme is that：A kind of gas spring by cylindrical hollow tubular rigid material cylinder body, cylinder body one End seal fill and support the front end of rigid material first, the cylinder body other end encapsulation and support the rear end of rigid material first, be fixed with The rigid material positioning that concentric piston rod and the piston component that can be moved in inner chamber of cylinder block are connected with the first front end opposite side Part, fixation be engaged on the piston rod and with keeper hollow tubular rigid material positioning pipe, on the first rear end Inflation check valve that the nearly back cavity safety valve of cylinder body side, the rear end inner chamber on the first rear end are connected with back cavity safety valve, Having the connected ante-chamber safety valve of independent endoporus with the first rear end, being connected the encapsulation of the first front end and cylinder body on the first rear end Ante-chamber and the capillary composition of the independent endoporus of the first rear end that inner chamber is communicated.The ante-chamber safety valve, back cavity safety valve, inflation One-way valve is the check valve of pressure adjustable.

The cylinder body is threadedly coupled with the first front end and the first rear end, and the piston component piston is loaded in the cylinder body Chamber, piston rod is passed from the centre bore of front end, constitutes the main body of gas spring.The back cavity safety valve, inflation check valve, front The right angle setting of the first rear end axial line is made in chamber safety valve and the first rear end.Further, there is a centre bore first rear end, The centre bore is connected with the inner chamber of cylinder block and connects the back cavity safety valve and inflation check valve, and the inflation check valve can For gas spring inflation, the back cavity safety valve can be with mistake gas carrier in release gas spring cylinder and the first rear end connecting cavity Pressure is to safe pressure；There are a separate wells to communicate with ante-chamber safety valve in first rear end, in the separate wells and the capillary The ante-chamber that chamber and the inner chamber of cylinder block are connected with front end is communicated, and the ante-chamber safety valve can be with mistake gas carrier in ante-chamber described in release Pressure is to safe pressure.

The keeper is connected with the front end, and the positioning pipe is connected with the piston rod, the keeper with The positioning pipe matches, the keeper at least three anchor points in approximately the same plane, the positioning pipe just with it is described Keeper keeps geo-stationary, the positioning pipe to be fixedly linked with the piston rod in the vertical plane of the cylinder body axial line Connect, piston described in the piston rod is fixedly connected, no matter the piston component motion state is why, the piston rod and the cylinder Body keeps geo-stationary in the vertical plane of the cylinder body axial line.

The invention has the beneficial effects as follows：There is provided a kind of gas spring.The gas spring, in the cavity at piston two ends When gas pressure is more than desirable pressure set in advance, can automatically be unloaded by corresponding safety valve and be depressed into institute set in advance Need pressure；The inflation check valve can time changing and the adjustment inner chamber of cylinder block need pressure to inflate in real time, this is just to production, system Make and maintenance brings great convenience, while the high defective products that the existing airing form of material brings also is reduced, also to production, manufacture Technique brings conveniently, reduces the requirement of production, manufacture to equipment and frock, also eliminated existing gas spring and fills in manufacture Gas process squeezes into draw point or steel ball described in the manufacturing that steel ball or draw point bring or use and flies the security incident removed when blocking Hidden danger；The setting of the keeper and the positioning pipe, it is ensured that the gas spring at work, what the piston rod drove Load can keep geo-stationary, and then ground with the cylinder body in the vertical plane of the cylinder body axial line, it is therefore prevented that described The load of gas spring makees circumference rotary motion relative in the cylinder body axial line with the cylinder body, the positioning pipe also every From the passage of the piston rod external environment condition, and then ground, it is described to position the Mechanical Contact of piston rod described in protection of pipe and prevent The entrance of dust.

Description of the drawings

Fig. 1 is the structural representation of gas spring of the present invention；

Fig. 2 schematic diagrames are the first keeper and positioning pipe location fit schematic diagram；

Fig. 3 is the first keeper schematic diagram；

Fig. 4 is the positioning pipe schematic diagram；

Fig. 5 is the schematic cross-section of Fig. 1；

Fig. 6 is the mplifying structure schematic diagram for inflating check valve；

Fig. 7 is the mplifying structure schematic diagram of back cavity safety valve；

Fig. 8 is that pressure in back cavity safety valve adjusts the second pressure of compression spring and adjusts part (86) structural representation；

Fig. 9 is charge valve agent structure schematic diagram in the first inflation check valve；

Figure 10 is replaceable accessory the second back cavity safety valve schematic diagram of the first back cavity safety valve, is a kind of Double-protective safety Valve；

Figure 11 is the structural representation of the main body of the first step valve in Figure 10；

Figure 12 is the structural representation of the main body of the second step valve in Figure 10.

Figure 13 is another component gas spring structural representation of Fig. 1 of the present invention；

Figure 14 is the decomposed structural representation of Figure 13 of the present invention；

Figure 15 is the perspective view of the second positioning pipe in Figure 14.

Figure 16 be multiple gas springs gas spring inflation check valve, the external integrated installation of one-way pressure relief valve and Using method.

Gas spring of the present invention, 1- cylinder bodies, the front ends of 2- first, the rear ends of 3- first, 4- piston components, 5- first are positioned Part, 6- positioning pipes, 7- back cavity safety valves, 8- inflation check valves, 9- ante-chamber safety valves, 10- capillary modules, 11- capillary groups The moving joint device of part.

Gas spring of the present invention, 40 to 423 is whole parts of the piston component 4, and 40 is 4 valve element, 41 4 sealing valve port material, 42 be 4 piston main body piston after ring, 43 is 4 piston main body, and 44 is in 4 43 wear-resisting material Material, 45 is in 4 43 piston front ring, and 46 is 40 pressure setting compression springs in 4, and 47 is ring after 43 tail seal material in 4, 48 is in 4 43 afterbody oiliness bearing, and 49 is in 4 43 tail seal material front ring, and 410 is in 4 43 afterbody pad, 411 It is 40 pressure setting parts in 4,412 is the control piece of the valve core 40 in 4, and 413 is the 412 rear oiliness bearings for coordinating in 4, and 414 is 4 Piston rod, 414 are threadedly coupled with 43, and 415 is ring after 414 encapsulant in 4, and 416 is in 4 414 oiliness bearing, 417 It is in 4 414 encapsulant front ring, 418 is in 4 417 back-up ring, 419 is the rear keeper of the positioning pipe 6,420 is in 4 412 front oiliness bearing, 421 is the prelocalization part of the positioning pipe 6, and 422 is in 4 412 support both compression spring, and 423 is in 4 422 keeper.424 is the convection current conversion hole at 43 two ends in 4.C70 to C74 is whole parts of the first step valve, 75 to C78 It is whole parts of the second step valve, the C70 of the first order valve body is threadedly coupled with C77, constitutes one complete described pair Safe valve.In the safety valve：C70 is the main body of the first step valve, and C71 is the prelocalization part of the first step valve, C70 is threadedly coupled with C71, and C72 is first order valve seal, and C73 is the compression spring of the first step valve pressure adjustment, and C74 is institute State the positioning and adjustment part of C73；C77 is the main body of the second step valve, and C75 is the seal of the second step valve, and C76 is the second step valve pressure The compression spring of power adjustment, C78 is the positioning and adjustment part of the C76；C79 is the front passage of the C71, and C710 is described The rear passage of C71, C711 is the rear passage of the C77.

E1 is by the tubular rigid material cylinder body of cylindrical hollow.

E2 is the encapsulation of cylinder body one end and the rigid material front end for supporting.

418 are connected with the encapsulant front ring 417, the inner chamber of the rear end of the front end 2 and the front end of the cylinder body 1 With the piston main body of the piston component 4, the ante-chamber of the gas spring is constituted.

E3 is the encapsulation of the cylinder body other end and the rigid material rear end for supporting.

E4 is the piston component that be fixed with concentric piston rod and can move in inner chamber of cylinder block.

E5 is the rigid material keeper for being connected with front end opposite side and being connected with a separate wells of E3.

The hollow tubular rigid material positioning pipe that E6 is integrally fixed on piston rod and is engaged with keeper.

E7 is mounted in the back cavity safety valve of the nearly cylinder body side on rear end.

The inflation check valve that the rear end inner chamber that E8 is mounted on rear end is connected with back cavity safety valve.

E9 is mounted on rear end has the ante-chamber safety valve that independent endoporus is connected with rear end.

E10 is the hole that the front interior cavity of the E1 is communicated, and E11 is the E3 independent ventilations hole, and the E11 enters with the E9's Pore connection, E10 and E11 and E5 inner spaces.And then ground, constitute overload pressure automatically unloading path in the ante-chamber of the E1.

Specific embodiment

What the present invention was realized in：

The recoverable gas spring of automatic overload protection can be freely inflated and have, the gas spring is by cylindrical hollow Tubular rigid material cylinder body 1, cylinder body one end encapsulation and support the first front end of rigid material 2, the cylinder body other end encapsulation and The first rear end of rigid material 3 for holding, it is fixed with the piston component 4 and that concentric piston rod 414 can be moved in inner chamber of cylinder block One front end opposite side connected the first keeper of rigid material 5, it is fixed on piston rod 414 and is engaged with the first keeper Hollow tubular rigid material positioning pipe 6, the back cavity safety valve 7 of nearly cylinder body side on the first rear end, after first What is connected with back cavity safety valve on end inflates check valve 8, is connected on the first rear end and with the independent endoporus of the first rear end Ante-chamber safety valve 9, connection the first ante-chamber for communicating with inner chamber of cylinder block of the first front end and the first rear end independent endoporus capillary Tube assembly 10 is constituted；The cylinder body 1 of the gas spring is threadedly coupled with first front end 2 or first rear end 3；Institute State and an inflation check valve 8 is mounted with the first rear end 3 of gas spring, and the pressure adjustable of inflation check valve 8；It is described The outer round surface of piston main body 43 of the piston component 4 of gas spring coordinates with the inner chamber circular surfaces of cylinder body 1, and the piston main body 43 will The inner chamber of the cylinder body 1 is separated into an ante-chamber and a back cavity, and the ante-chamber is connected with the first front end 2, the back cavity and One rear end 3 connects, and the ante-chamber and the back cavity are connected respectively with ante-chamber safety valve 9, back cavity safety valve 7, the ante-chamber peace Full valve 9 and the back cavity safety valve 7 are pressure adjustable check valve；The gas spring is also provided with the first keeper 5 and determines Position pipe 6, positioning pipe 6 is fixedly connected with piston rod 414, has projection, the inner circle of the positioning pipe 6 on first keeper 5 is cylindrical Upper fluted, the projection coordinates with the groove gap；There is a front end first front end 2 of the gas spring, and described first The other end of front end 2 is the rear end of referred to as the first front end 2, and the rear end of first front end 2 is connected with the ante-chamber of cylinder body 1, institute The front end of the first front end 2 is stated built with ring after oiliness bearing 416, encapsulant front ring 417, back-up ring 418, multiple encapsulants 415, ring 415, oiliness bearing 416, encapsulant front ring 417, back-up ring 418 match with piston rod 414 after the encapsulant.

First front end 2 is equal to cylinder head, and first rear end 3 is equal to cylinder tail, first front end 2 and the cylinder body 1 screw connection structure is removable, and first rear end 3 is also removable with being threadedly coupled for the cylinder body 1.

The inflation check valve 8 is arranged on the first rear end 3 of the cylinder body 1 or before the first of the cylinder body 1 On end 2；The inflation check valve 8, the relatively described axial line of first front end 2 or the axial line of the first rear end 3 make right angle setting Or the relatively described axial line of first front end 2 or the axial line of the first rear end 3 make the installation of coaxial inner conductor direction, and mounting means is equal For threaded connection, the inflation check valve 8 is by inflation valve body 80, seal valve element 81, conical surface seal material 82, sealing suitable for reading Adjust part 86, end seals plug 87 of material 83, lower mouth encapsulant 84, compression spring 85, second pressure is constituted, the inflation The end face of valve body 80 has the cross recess of convenient installation；The end seals plug 87 is pulled down, external inflation device connection is filled It is located at after the screw thread at mounting end sealing plug 87 in air valve main body 80, you can be filled with gases at high pressure, the gases at high pressure are pushed away Seal valve element 81 is opened, the gases at high pressure enter the inner chamber of cylinder body 1 of the gas spring, into inflated condition, when outside is filled Device of air is removed and is located at after the screw thread at mounting end sealing plug on connection inflation valve body 80, and compression spring 85 recovers bullet Power, compression spring 85 promotes second pressure to adjust part 86, and second pressure part 86 of adjusting is threadedly coupled with seal valve element 81, sealing Part valve element 81 retracts retrogressing by second pressure part 86 of adjusting, and the conical surface of seal valve element 81 and conical surface seal material 82 press charge valve The lower mouth encapsulant 84 in the exit of main body 80 and encapsulant suitable for reading 83, seal valve element 81 is closed, and inflation is completed, and changes pressure The screw thread matching length that contracting spring 85 or adjustment second pressure are adjusted between part 86 and seal valve element, you can complete the inflation The pressure that turns off or on of check valve is adjusted.

The gas spring will be greater than presetting the gases at high pressure of pressure and be referred to as overload pressure gas, will be equal to setting in advance The gases at high pressure of constant-pressure are referred to as normal pressure gas, and the ante-chamber safety valve 9 of the gas spring is used to unload before the cylinder body 1 Overload pressure gas in chamber to normal pressure gas set in advance, the back cavity safety valve 7 of the gas spring are used to unload Overload pressure gas in the back cavity of the cylinder body 1 is to normal pressure gas set in advance；The inner chamber of cylinder block of the gas spring As long as interior have overload pressure gas, all mark set in advance can be offloaded to by the ante-chamber safety valve 9 or the back cavity safety valve 7 Quasi- pressed gas；One or more ante-chamber safety valves 9 are installed, for unloading the overload of the ante-chamber of the cylinder body 1 of the gas spring Pressed gas, install one or more back cavity safety valves 7, for unloading the overload pressure of the cylinder body back cavity of the gas spring Strength body, the ante-chamber safety valve or the back cavity safety valve are installed on first front end 2 or first rear end 3, institute State and have the way being connected with the ante-chamber or back cavity of the cylinder body 1, institute after ante-chamber safety valve 9 or the back cavity safety valve 7 installation Ante-chamber safety valve or the back cavity safety valve are stated relative to the axial line of first front end 2 or the axle center of first rear end 3 Line makees right angle setting or coaxial line direction is installed, before the ante-chamber safety valve or the back cavity safety valve are relative to described first The axial line at end 2 or the axial line of first rear end 3 make coaxial line direction and install or hang down when cannot install because position is limited It is straight to install.

As the ante-chamber safety valve 9 of the gas spring is with the 26S Proteasome Structure and Function of the back cavity safety valve 7, all It is the check valve of pressure adjustable, the first back cavity safety valve 7 is by the safe valve body 70 of the first back cavity, the second prelocalization part 71, first Seal 72, the first compression spring 73, first pressure part 74 of adjusting is constituted, safe valve body 70 and second prelocalization of the first back cavity Part 71 is threadedly coupled, and the first compression spring 73 is arranged on first seal 72 and first pressure is adjusted between part 74, and first pressure is whole Determine part 74 to be threadedly coupled with the safe valve body 70 of the first back cavity, the first pressure afterbody of part 74 of adjusting has a cross mouth, the first back cavity peace Full valve main body 70 has upper vent hole 75, the i.e. pressure relief vent of the first back cavity safety valve 7, has passage 76 on the second prelocalization part 71, The passage 76 is the air admission hole of the second prelocalization part 71, part 74 or can change the by adjusting first pressure and adjusting One compression spring 73 presets pressure adjusting the required of the first back cavity safety valve.

The projection is at least three in the plane perpendicular with the axial line of the first keeper 5；It is corresponding described Groove is also at least three in the plane perpendicular with the axial line of the positioning pipe 6.

The gas spring is containing ring after oiliness bearing 416, encapsulant front ring 417,418, two encapsulants of back-up ring 415, ring 415, oiliness bearing 416, encapsulant front ring 417, back-up ring 418 and the phase of piston rod 414 after described two encapsulants Matching.

The piston component of the gas spring is the controllable piston component with valve element 40 and control piece 412, and valve element 40 has One pressure setting compression spring 46, the pressure setting compression spring 46 is installed on an inner bore of step and the 3rd pressure of piston main body 43 Power is adjusted between part 411, and valve element 40 has a screw rod end, and the 3rd pressure setting part 411 has end face screwed hole of centre, the spiral shell Bar end is connected with the screwed hole, and pressure setting compression spring 46 is used for the reset of valve element 40；Control piece 412 has a supporting bullet Spring 422, supporting spring 422 is installed between the keeper 423 of front oiliness bearing 420 and second of the end of control piece 412, and second determines Position part 423 is threadedly coupled with control piece 412, and supporting spring 422 is used to be automatically reset after the release external force of control piece 412.

The gas spring is inflated by inflation check valve 8 to inner chamber of cylinder block, when the blowing pressure more than ante-chamber safety valve 9 or Back cavity safety valve 7, the inner chamber overload pressure of cylinder body 1 can be unloaded and be depressed into peace set in advance by ante-chamber safety valve 9 or back cavity safety valve 7 Total pressure, the ante-chamber or the back cavity have overload gases at high pressure to spray sounding, now stop inflation, the gas spring inflation Complete；Cavity temperature or other reason temperature are raised in because of cylinder body 1, according to equation of gaseous state P1*VI/T1=P2*V2/T2, institute Stating temperature and raising causes the inner chamber inner high voltage gas pressure ratio of the cylinder body 1 to increase, and overload high pressure gas are produced in the inner chamber of cylinder body 1 Body, now, the overload gases at high pressure can be offloaded in the inner chamber of the cylinder body 1 in advance by ante-chamber safety valve 9 or back cavity safety valve 7 The safe pressure for first setting；Cylinder body 1 and the first front end 2 and the first rear end 3 is dismantled and assembled is threadedly coupled, when the gas spring has When unit exception needs repairing, the first pressure part 74 of adjusting for first adjusting ante-chamber safety valve 9 or back cavity safety valve discharges the cylinder The overload gases at high pressure of the inner chamber of body 1, remove end seals plug 87, and then top pressure inflation check valve second pressure is adjusted part 86, Seal valve element 81 is opened, and is discharged the inner chamber of cylinder body 1 and is transshipped gases at high pressure, and the overload gases at high pressure release is finished, can entered The maintenance work of the row gas spring；First keeper 5 is threadedly coupled with the first front end 2, first keeper 5 with it is described Cylinder body 1 keeps geo-stationary, and positioning pipe 6 is with piston rod 414 by keeper after lock nut 419 or the company of positioning of prelocalization part 421 Connect, the positioning pipe 6 keeps geo-stationary, first keeper 5 only to make cylinder with the positioning pipe 6 with the piston rod 414 The direction of axis line relative motion of body 1, first keeper 5 is relative quiet around circular direction in the axial line of cylinder body 1 with the positioning pipe 6 Only, further, piston rod 414 only make the direction of axis line relative motion of cylinder body 1 relative to cylinder body 1 and the axial line of cylinder body 1 around Circular direction geo-stationary；The front end inner chamber of first front end 2 is equiped with ring 415 after encapsulant, oiliness bearing 416, sealing Material front ring 417, back-up ring 418, ring 415, oiliness bearing 416, sealing after the other end of the back-up ring 418 is installed in addition with and sets encapsulant Material front ring 417, back-up ring 418, after the encapsulant ring 415, oiliness bearing 416, encapsulant front ring 417, back-up ring 418 with Piston rod 414 matches, and ring 415 or encapsulant front ring 417 are strengthened to the close of the inner chamber gases at high pressure of cylinder body 1 after encapsulant Envelope, oiliness bearing 416 increased the guide function of piston rod 414.Gas spring of the present invention, the rear end connection the of cylinder body 1 The front end of one rear end 3, the first front end of the cylinder body 1 reconnects the rear end of the first front end 2；Vertical its axle in first rear end 3 The hole of front end first of first rear end 3 in heart line direction, the second hole of 3 front end of the first rear end, the rear hole of the first rear end 3, back cavity peace Full valve is installed in the first hole of the front end of first rear end 3, and inflation safety valve is installed on the front end of first rear end 3 In second hole, after first rear end 3 has a front end lumen orifice, the front end lumen orifice of first rear end 3 to connect described first The hole of front end first at end 3 and the hole of front end second of first rear end 3, the front end lumen orifice connection of first rear end 3 is described The rear interior cavity of cylinder body 1, constitutes the back cavity of the gas spring

And then ground, the overload pressure in the back cavity of the gas spring, just can automatically be unloaded by the back cavity safety valve 7 It is depressed into the safe pressure of setting.

The other end of the cylinder body 1, the other end is the first front end of the cylinder body 1, the first front end of the cylinder body 1 Connect the rear end of first front end 2, there are the endoporus of an all-pass, the endoporus and the inner chamber phase of the cylinder body 1 in first front end 2 Logical, the diameter of bore coordinates with the external diameter interval of the piston rod 414 of the piston component 4, the other end of first front end 2 It is the front end of first front end 2, there are a big endoporus, the big endoporus in front end of first front end 2 in the front end of first front end 2 With diameter greater than the endoporus of the all-pass of first front end 2, ring 415 is installed on described after the encapsulant of the piston component 4 The phase of ring 415 after the bottom of the big endoporus in front end of one front end 2, the rear oiliness bearing 416 of the piston component 4 and the encapsulant Even, the encapsulant front ring 417 of the piston component 4 is connected with the rear oiliness bearing 416, the encapsulant front ring 417 Installing the front end for having the outside of another encapsulant front ring 417, first front end 2 after being connected with the rear oiliness bearing 416 After the complete encapsulant front ring 417, the big endoporus in the first front end of first front end 2 is outside the encapsulant front ring 417 The back-up ring 418 that there is a rectangular recess, the piston component 4 side is installed in the rectangular recess, and the back-up ring 418 is close with described Closure material front ring 417 is connected, the rear end of first front end 2 and the inner chamber of the front end of the cylinder body 1 and the piston component 4 Piston main body, constitute the ante-chamber of the gas spring.And then ground, the rear hole of first rear end 3 is a separate wells, The ante-chamber safety valve 9 is installed on the rear hole of first rear end 3, and the rear hole of first rear end 3 also has described first The rear hole passage of the first rear end 3 of vertical its direction of axis line in rear end 3；Have described on the rear end of first front end 2 The ante-chamber passage connected with the ante-chamber of the gas spring of vertical its direction of axis line in one front end 2；The capillary 10 connects Lead to the rear hole passage of first rear end 3 and the ante-chamber passage of first front end 2.And then ground, the gas spring Ante-chamber in overload pressure, just can automatically be unloaded by the ante-chamber safety valve 9 and be depressed into security settings pressure.

The back cavity of gas spring of the present invention, the ante-chamber of the gas spring or the gas spring has overload pressure to lead to It is out-of-date, the air admission hole 76 that overvoltage stress gas is entered in the keeper 71, and then ground, the overvoltage stress gas is pushed open described Seal 72, the compression spring 73 is promoted and compressed by the seal 72, and the overvoltage stress gas enters the valve The passage 75 of main body 70, the passage is connected with atmospheric pressure environment, and then ground, and the overload pressure gas is relaxed；When When overload pressure gas is relaxed to setting pressure, the compression spring promotes the seal 72 to block 71 venthole, institute State gas spring pressure and keep setting pressure.

Gas spring of the present invention, the inflation check valve 8 takes out the end seals plug 87, with the inflation The threaded connection at described 87, and then ground are taken out in valve body 80, can be to the inflation inner inflatable of valve body 80, aeration gas flow By the flat position 810 of the pressure setting part 86, so ground, passage of the aeration gas flow into the inflation valve body 80 89, and then ground, the aeration gas flow is pushed to the seal valve element 81, and then ground, when the aeration gas flow is more than described close During the internal pressure that sealing valve element 81 is contacted with the back cavity of the gas spring, the aeration gas flow promotes the seal valve element 81 to the gas spring back cavity internal motion, the pressure setting part 86 is threadedly coupled with the seal valve element 81, institute State pressure setting part 86 to be synchronized with the movement with the seal valve element 81 in the charge valve body lumen, so ground, the pressure The compression spring 85 adjusted is compressed, and the encapsulant valve element of the inflation check valve 8 is opened, and the aeration gas flow enters institute The back cavity of gas spring is stated, starts inflation；And then, the aeration gas flow constantly into the back cavity of the gas spring, works as institute State pressure in back cavity more than the gas spring ante-chamber safety valve 9 or back cavity safety valve 7 setting pressure when, into described Working condition；And then ground, in the gas spring gas replenishment process, the aeration gas flow is constantly entered after the gas spring Chamber, when the ante-chamber safety valve 9 or back cavity safety valve 7 of the gas spring have pressure relief of gas, stops inflation, with the charge valve Take out the screw thread at described 87 in main body 80 to disconnect, and then, the passage 89 and the pressure of the inflation valve body 80 is whole Determine flat position 810 and the 80 inner chamber space connection ambient atmosphere of part 86, the seal valve element 81 is in 80 chamber pressure Release, the compression spring 85 of described 8 pressure setting resets, the seal valve element 81 and described 8 pressure setting part 86 synchronous resets, the sealing material suitable for reading on the conical surface of the encapsulant 82 compacting inflation valve body 80 of the seal valve element 81 Material 83, the lower mouth encapsulant 84 in the compacting of seal valve element 81 80, the seal valve of the inflation check valve 8 Core 81 is closed, and then ground, and the end seals plug 87 of the inflation check valve 8 loads the charge valve master of the inflation check valve 8 Body 80 is blocked.The gas spring inflation is completed.

Gas spring of the present invention, the gas spring operation principle be filled with closed cylinder barrel inert gas or Person's oil gas mixture, makes several times or tens times of cylinder interior pressure superatmospheric power, and the cross-sectional area using piston rod is little In piston cross-section area so as to produce pressure differential realizing the motion of piston rod.Here the control of lower piston rod control piece is mainly illustrated Piston movement realizes process, in the gas spring, presses the pressure pressure setting of control piece 412,412 part 411 and control The supporting spring 422 of part 412, valve element 40 is synchronized with the movement with pressure setting part 411, and depresses pressure setting compression spring 46, valve Core 40 is opened, and the back cavity of the gas spring connects the convection current conversion hole 424 at two ends and the gas with the endoporus of piston main body 43 The ante-chamber of body spring；The supporting spring 22 for unclamping control piece 412,412 recovers elastic force, and 412 supporting spring 422 promotes control piece 412 return to original state, and control piece 412 leaves pressure setting part 411, and pressure setting compression spring 46 recovers elastic force, and pressure is whole Determining compression spring 46 promotes pressure setting part 411 and valve element 40 to return to original state, and valve element 40 is pressed on the valve of piston main body 43 On mouthful encapsulant 41, after the convection current conversion hole 424 at the endoporus connection two ends of blocking piston main body 43 and the gas spring The ante-chamber of chamber passage, the back cavity of the gas spring and the gas spring is by piston blocks.By the control to control piece 412 System, realize to piston the inner chamber motion state of cylinder body 1 of the gas spring control.

Gas spring of the present invention, ring 415, oiliness bearing 416, encapsulant front ring, back-up ring 418 after encapsulant.

The back cavity of gas spring of the present invention, the ante-chamber of the gas spring or the gas spring has overload pressure to lead to Out-of-date, overvoltage stress gas enters the front passage C79 of the prelocalization part C71 of first step valve, and then ground, the overvoltage pressure Strength body pushes the first order valve seal C72 open, and compression spring C73 of the first step valve pressure adjustment is by the first order Valve seal C72 is promoted and compressed, and the overvoltage stress gas enters the front passage of the first order valve body C70 C710, the overvoltage stress gas pushes the seal C75 of second step valve, the compression bullet of the second step valve pressure adjustment open Spring C76 is promoted and compressed by the second level valve seal C75, and the overvoltage stress gas enters the second level valve body The rear passage C711 of C77, passage is connected with atmospheric pressure environment, and then ground, and the overload pressure gas is relaxed；Work as overload When pressed gas are relaxed to setting pressure, compression spring C73 of the first step valve pressure adjustment promotes first step valve Seal C72 blocks the venthole of the prelocalization part C71 of first step valve, the compression spring of the second step valve pressure adjustment C76 promotes the second level valve seal C75 to block the venthole of the prelocalization part C70 of second step valve, the gas bullet Spring pressure keeps setting pressure.

The 26S Proteasome Structure and Function of inflation check valve 8 in described in gas spring of the present invention, the inflation check valve E8 and Fig. 5 And course of work equivalent；The back cavity safety valve E7 is equal to the 26S Proteasome Structure and Function of back cavity safety valve 7 and the course of work described in Fig. 5； The ante-chamber safety valve E9 is equal to the 26S Proteasome Structure and Function of ante-chamber safety valve 9 and the course of work described in Fig. 5；The piston component E4 with The 26S Proteasome Structure and Function of piston component 4 described in Fig. 5 and the course of work are equal to；The gas spring keeper E5 and gas bullet described in Fig. 5 The positioning function and positioning mode of spring keeper 5 is the same, the gas spring keeper E5 and gas spring described in Fig. 5 The capillary 10 to connect the ante-chamber and the gas spring of the gas spring and the kinetic energy of front safety valve path be to be equal to 's；The positioning pipe E6 is equal to the 26S Proteasome Structure and Function and the course of work of positioning pipe described in Fig. 56.

Gas spring of the present invention, the inflation check valve E8 takes out the end seals plug and and aerating device Joint connection, start gas spring inflation, aeration gas flow enters the inner chamber of the inflation check valve E8, when the inner chamber When pressure is more than the rear cavity pressure of the gas spring, the valve element of the inflation check valve E8 is opened, and the aeration gas flow is entered The back cavity of the gas spring, the gas spring starts inflation；And then ground, the aeration gas flow is constantly into the gas bullet The back cavity of spring, when the pressure in the back cavity is more than the setting of the ante-chamber safety valve E9 or back cavity safety valve E7 of the gas spring During pressure, into the working condition, and then ground, in the gas spring gas replenishment process, the aeration gas flow is constantly entered The back cavity of the gas spring, when the ante-chamber safety valve E9 or back cavity safety valve E7 of the gas spring have pressure relief of gas, stops Only inflate, when the joint of the aerating device disconnects, the valve element of the inflation check valve E8 is closed, and then ground, is filled described in loading The end seals plug closure of gas check valve E8, the gas spring inflation terminates.

Gas spring of the present invention, when the ante-chamber of the gas spring has overload pressure, the overload pressure passes through institute The hole E10 that the front interior cavity of cylinder body E1 interlinks, and then ground are stated, the overload pressure enters the inner chamber of the keeper E5, and then Ground, the overload pressure enters independent through-hole E11 of the rear end E3, and then ground, and the overload pressure is pacified into the ante-chamber Full valve E9, and then ground, the overload pressure pushes the valve element of the ante-chamber safety valve E9, and then ground open, and the overload pressure is entered Ante-chamber safety valve E9 inner chambers, and then ground, the overload pressure is directly arranged to outside atmospheric pressure environment, and the overload pressure starts to unload Pressure；When the pressure of the overload pressure release is equal to the ante-chamber setting pressure of the gas spring, the ante-chamber safety valve E9 Valve element close, the gas spring pressure keeps setting pressure, the ante-chamber of the gas spring to have overload pressure automatically unloading Terminate.When the back cavity of the gas spring has overload pressure, the overload pressure is directly connected by the back cavity of the cylinder body E1 The valve element of the back cavity safety valve E7, and then ground, the overload pressure enters back cavity safety valve E7 inner chambers, and then ground, the mistake Carry pressure directly to arrange to outside atmospheric pressure environment, the overload pressure starts release；Pressure when the overload pressure release etc. When the ante-chamber of the gas spring sets pressure, the valve element of the back cavity safety valve E7 is closed, and the gas spring pressure is protected Setting pressure is held, the back cavity of the gas spring has overload pressure automatically unloading to terminate.

The invention further relates to gas spring inflation check valve, the external installation of one-way pressure relief valve and using method, It is related to gas spring inflation check valve, the integrated installation of one-way pressure relief valve and the using method of multiple gas springs.ga、 Gb, gc are three independent gas springs, and g8a is the inflation check valve of ga, and g8b is the inflation check valve of gb, and g8c is filling for gc Gas check valve；G7a is the back cavity safety valve of ga, and g7b is the back cavity safety valve of gb, and g7c is the back cavity safety valve of gc；G9a is ga Ante-chamber safety valve, g9b is the ante-chamber safety valve of gb, and g9c is the ante-chamber safety valve of gc；G8a, g8b, g8c integrated installation is in g8z On base, on g7z bases, g9a, g9b, g9c integrated installation is on g9z bases for g7a, g7b, g7c integrated installation.

Claims

1. the recoverable gas spring of automatic overload protection can be freely inflated and be had, be it is characterized in that, the gas spring is by justifying Tubular rigid material cylinder body (1) of columnar hollow, the front end of rigid material first (2) of the encapsulation of cylinder body one end and supporting, cylinder body are another One end encapsulate and support the rear end of rigid material first (3), be fixed with concentric piston rod (414) and can move in inner chamber of cylinder block Piston component (4) be connected with the first front end opposite side the keeper of rigid material first (5), be fixed on piston rod (414) And hollow tubular rigid material positioning pipe (6), the nearly cylinder body side on the first rear end being engaged with the first keeper Back cavity safety valve (7), the inflation check valve (8) connected with back cavity safety valve on the first rear end, installed in the first rear end The connected ante-chamber safety valve (9) of upper and with the first rear end independent endoporus, it is connected the first front end communicates with inner chamber of cylinder block first Capillary module (10) composition of the independent endoporus of ante-chamber and the first rear end；The cylinder body (1) of the gas spring with it is described First front end (2) or first rear end (3) are threadedly coupled；An institute is mounted with first rear end (3) of the gas spring State inflation check valve (8), and inflation check valve (8) pressure adjustable；The piston main body of the piston component (4) of the gas spring (43) outer round surface coordinates with cylinder body (1) inner chamber circular surfaces, and the cylinder body (1) inner chamber is separated into one by the piston main body (43) Individual ante-chamber and a back cavity, the ante-chamber is connected with the first front end (2), and the back cavity is connected with the first rear end (3), it is described before Chamber and the back cavity are connected respectively with ante-chamber safety valve (9), back cavity safety valve (7), the ante-chamber safety valve (9) and it is described after Chamber safety valve (7) is pressure adjustable check valve；The gas spring is also provided with the first keeper (5) and positioning pipe (6), fixed Position pipe (6) is fixedly connected with piston rod (414), has projection, positioning pipe (6) inner circle on first keeper (5) is cylindrical Upper fluted, the projection coordinates with the groove gap；There is a front end first front end (2) of the gas spring, and described The other end of one front end (2) is the rear end of referred to as the first front end (2), the rear end of first front end (2) and the ante-chamber of cylinder body (1) Be connected, the front end of first front end (2) built with oiliness bearing (416), encapsulant front ring (417), back-up ring (418), Ring (415) after multiple encapsulants, ring (415) after the encapsulant, oiliness bearing (416), encapsulant front ring (417), Back-up ring (418) matches with piston rod (414).

2. gas spring according to claim 1, is characterized in that, the first front end (2) equivalent cylinder head, described first Rear end (3) be equal to cylinder tail, first front end (2) be with the screw connection structure of the cylinder body (1) it is removable, described first Rear end (3) is also removable with being threadedly coupled for the cylinder body (1).

3. gas spring according to claim 1, is characterized in that, inflation check valve (8) is installed in the cylinder body (1) The first rear end (3) on or on first front end (2) of the cylinder body (1)；Inflation check valve (8) is relatively described First front end (2) axial line or first rear end (3) axial line make right angle setting or relatively described first front end (2) axial line Or the first rear end (3) axial line makees the installation of coaxial inner conductor direction, and mounting means is threaded connection, and the inflation is unidirectional Valve (8) is close by inflation valve body (80), seal valve element (81), conical surface seal material (82), encapsulant suitable for reading (83), lower mouth Closure material (84), compression spring (85), second pressure adjust part (86), end seals plug (87) composition, the charge valve master Body (80) end face has the cross recess of convenient installation；The end seals plug (87) is pulled down, external inflation device connection is filled In air valve main body (80) after the screw thread at mounting end sealing plug (87) place, you can be filled with gases at high pressure, the high pressure gas Body pushes seal valve element (81) open, and the gases at high pressure enter cylinder body (1) inner chamber of the gas spring, into inflated condition, After external inflation device removes the screw thread being located in connection inflation valve body (80) at mounting end sealing plug, bullet is compressed Spring (85) recovers elastic force, and compression spring (85) promotes second pressure to adjust part (86), and second pressure is adjusted part (86) and seal Valve element (81) is threadedly coupled, and seal valve element (81) retracts retrogressings by second pressure part (86) of adjusting, and seal valve element (81) is bored Face and conical surface seal material (82) press the lower mouth encapsulant (84) in inflation valve body (80) exit and encapsulant suitable for reading (83), seal valve element (81) is closed, and inflation completes, change compression spring (85) or adjustment second pressure adjust part (86) with it is close Screw thread matching length between sealing valve element, you can complete the inflation check valve turns off or on pressure adjustment.

4. gas spring according to claim 1, is characterized in that, the gas spring will be greater than presetting the height of pressure Body of calming the anger is referred to as overload pressure gas, will be referred to as normal pressure gas, the gas equal to the gases at high pressure for presetting pressure The ante-chamber safety valve (9) of spring is for unloading the overload pressure gas in the cylinder body (1) ante-chamber to standard pressure set in advance Strength body, the back cavity safety valve (7) of the gas spring is for unloading the overload pressure gas in the cylinder body (1) back cavity to pre- The normal pressure gas for first setting；As long as having overload pressure gas in the inner chamber of cylinder block of the gas spring, all can be by before described Chamber safety valve (9) or the back cavity safety valve（7）It is offloaded to normal pressure gas set in advance；One or more ante-chambers are installed Safety valve (9), for unloading the overload pressure gas of the cylinder body (1) ante-chamber of the gas spring, after installing one or more Chamber safety valve (7), for unloading the overload pressure gas of the cylinder body back cavity of the gas spring, the ante-chamber safety valve or The back cavity safety valve is installed on first front end (2) or first rear end (3), the ante-chamber safety valve (9) or institute Stating after back cavity safety valve (7) is installed has a way being connected with the ante-chamber or back cavity of the cylinder body (1), the ante-chamber safety valve or The back cavity safety valve makees vertical peace relative to the axial line of first front end (2) or the axial line of first rear end (3) Dress or coaxial line direction are installed, when the ante-chamber safety valve or the back cavity safety valve are relative to the axle of first front end (2) The axial line of heart line or first rear end (3) is made to make vertical peace when coaxial line direction is installed or cannot be installed because position is limited Dress.

5. gas spring according to claim 4, is characterized in that, the ante-chamber safety valve (9) of the gas spring and The 26S Proteasome Structure and Function of the back cavity safety valve (7) is the same, is all the check valve of pressure adjustable, and back cavity safety valve (7) is by The safe valve body of one back cavity (70), the second prelocalization part (71), first seal (72), the first compression spring (73), the first pressure Power is adjusted part (74) composition, and the safe valve body of the first back cavity (70) is threadedly coupled with the second prelocalization part (71), and first compresses bullet Spring (73) is adjusted between part (74) installed in first seal (72) and first pressure, and first pressure is adjusted part (74) and the first back cavity Safe valve body (70) threaded connection, first pressure part (74) afterbody of adjusting has cross mouth, the safe valve body of the first back cavity (70) There are upper vent hole (75), the i.e. pressure relief vent of back cavity safety valve (7), there is passage (76) on the second prelocalization part (71), it is described logical Pore (76) is the air admission hole of the second prelocalization part (71), part (74) or can change the by adjusting first pressure and adjusting One compression spring (73) presets pressure adjusting the required of the first back cavity safety valve.

6. gas spring according to claim 1, is characterized in that, the projection with the first keeper (5) axle center At least three in the perpendicular plane of line；The corresponding groove is in the plane perpendicular with the positioning pipe (6) axial line On also at least three.

7. gas spring according to claim 1, is characterized in that, the gas spring contains oiliness bearing (416), sealing material Ring (415) after material front ring (417), back-up ring (418), two encapsulants, ring (415), oil-containing axle after described two encapsulants Hold (416), encapsulant front ring (417), back-up ring (418) and piston rod (414) to match.

8. gas spring according to claim 1, is characterized in that, the piston component of the gas spring is with valve element (40) and control piece (412) controllable piston component, valve element (40) has a pressure setting compression spring (46), the pressure setting pressure Contracting spring (46) is installed between an inner bore of step of piston main body (43) and the 3rd pressure setting part (411), and valve element (40) has One screw rod end, the 3rd pressure setting part (411) has end face screwed hole of centre, and the screw rod end connects with the screwed hole Connect, pressure setting compression spring (46) for valve element (40) reset；Control piece (412) has a supporting spring (422), supports bullet Spring (422) is installed between the front oiliness bearing (420) of control piece (412) end and the second keeper (423), the second keeper (423) it is threadedly coupled with control piece (412), supporting spring (422) is for control piece（412）Automatically reset after release external force.

9. gas spring according to claim 1, is characterized in that, the gas spring is by inflation check valve (8) to cylinder Intracoelomic cavity is inflated, and when the blowing pressure is more than ante-chamber safety valve (9) or back cavity safety valve (7), cylinder body (1) inner chamber overload pressure can lead to Cross ante-chamber safety valve (9) or back cavity safety valve (7) is unloaded and is depressed into safe pressure set in advance, the ante-chamber or the back cavity had Carry gases at high pressure and spray sounding, now stop inflation, the gas spring inflation is completed；When because of the interior cavity temperature of cylinder body (1) or Other reason temperature are raised, and according to equation of gaseous state P1*VI/T1=P2*V2/T2, the temperature is raised and caused in the cylinder body (1) Chamber inner high voltage gas pressure ratio increase, produces overload gases at high pressure, now, the overload gases at high pressure in cylinder body (1) inner chamber Safe pressure set in advance in the cylinder body (1) inner chamber can be offloaded to by ante-chamber safety valve (9) or back cavity safety valve (7)； Cylinder body (1) and the first front end (2) and the first rear end (3) are dismantled and assembled is threadedly coupled, when the gas spring has unit exception to need During maintenance, the first pressure part (74) of adjusting for first adjusting ante-chamber safety valve (9) or back cavity safety valve discharges cylinder body (1) inner chamber Overload gases at high pressure, remove end seals plug (87), then top pressure inflation check valve second pressure is adjusted part (86), sealing Part valve element (81) is opened, and is discharged cylinder body (1) inner chamber and is transshipped gases at high pressure, and the overload gases at high pressure release is finished, can entered The maintenance work of the row gas spring；First keeper (5) is threadedly coupled with the first front end (2), first keeper (5) Geo-stationary is kept with the cylinder body (1), positioning pipe (6) is with piston rod (414) by keeper after lock nut (419) or front fixed Position part (421) is located by connecting, and the positioning pipe (6) keeps geo-stationary, first keeper with the piston rod (414) (5) cylinder body (1) direction of axis line relative motion, first keeper (5) and the positioning pipe are only made with the positioning pipe (6) (6) in cylinder body (1) axial line around circular direction geo-stationary, further, piston rod (414) only makees cylinder body relative to cylinder body (1) (1) direction of axis line relative motion and in cylinder body (1) axial line around circular direction geo-stationary；The front end of first front end (2) Inner chamber is equiped with ring after encapsulant (415), oiliness bearing (416), encapsulant front ring (417), back-up ring (418), described Back-up ring (418) other end is installed in addition with and sets ring after encapsulant (415), oiliness bearing (416), encapsulant front ring (417), back-up ring (418), ring (415), oiliness bearing (416), encapsulant front ring (417), back-up ring (418) and piston rod after the encapsulant (414) match, ring (415) or encapsulant front ring (417) are strengthened to cylinder body (1) inner chamber gases at high pressure after encapsulant Sealing, oiliness bearing (416) increased the guide function of piston rod (414).