Gas cylinder by hydrostatic pressure test Special pressing headTechnical field
The present invention relates to a kind of gas cylinder compression testing device, especially relate to a kind of gas cylinder by hydrostatic pressure test Special pressing head.
Background technology
At present, when pressure cylinder is carried out hydraulic pressure applied voltage test, it usually needs manually will be provided with the rotation of externally threaded pressure headTight in the female thread of pressure cylinder import and export, and use the external threaded surface of pressure head be wound around raw material band or be coated with fluid sealantSeal, or use seal washer to seal；Publication No. 101457859A(entitled " inner pressure sealed type screwed joint ") and openNumber for 202972314U(entitled " hydraulic test of pressure vessel is special suppresses joint ") patent documentation disclosed in hydraulic pressure examinationTest pressure head, use pressure head to be threaded in pressure cylinder and import and export upper and elastic packing packing ring Expansion sealing is entered at pressure cylinderThe mode in exit.The connection of above-mentioned water pressure test pressure head and sealing means, need operator manually to screw in, whole operationProcess is the most loaded down with trivial details, and the labor intensity of workman is big, and the efficiency of test jobs is low, it is difficult to meet the automatic of automatic test production lineThe demand of operation, and, above-mentioned connection and sealing means can produce extra axial force on pressure cylinder is imported and exported, forFor requiring the pressure cylinder not allowing to bear axial force in applied voltage test, above-mentioned water pressure test pressure head cannot meet useRequirement.It addition, import and export as not have female unthreaded hole for pressure cylinder, above-mentioned water pressure test pressure head also cannot realizeConnecting and seal, the suitability is poor.
Summary of the invention
The applicant, for above-mentioned problem, has carried out Improvement, it is provided that a kind of gas cylinder by hydrostatic pressure test Special pressing head, knotStructure is the compactest, convenient to operation, seals reliable, it is to avoid in test process, gas cylinder bears axial force, improves test jobsEfficiency, meets the demand of the automation mechanized operation of automatic test production line, alleviates the labor intensity of workman, and improves the suitability.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that:
A kind of gas cylinder by hydrostatic pressure test Special pressing head, including the center-pole of hollow tubular, described center-pole slides in sleeve pipe, describedCenter-pole lower end be installed with that nut, elastic seal ring and pad be sleeved between described sleeve pipe and described nut described inOn core bar；The upper end of described sleeve pipe is provided with flange, and described sleeve upper end fixes the lower end connecting connector by flange, cylinderThe upper end connecting described connector is fixed in cylinder body lower end, and the connecting rod connecting lifting drive source connects described gas by pressing plate is fixingThe upper end of the cylinder body of cylinder；Described connector is the cylinder that two ends are provided with adpting flange, and the cylinder side of described connector is provided with prolongsExtend the groove of described connector upper end；The upper end of described center-pole extends in described connector, and horizontally disposed high pressure is evenOne end of extension bar passes the groove of described connector the fixing upper end connecting described center-pole, and described high pressure connecting rod is provided with logicalHole also connects the endoporus of described center-pole, and the piston rod of described cylinder extends in described connector and connect described high pressure connectBar.
Further:
The lower section of described nut is provided with ball nut.
Described elastic seal ring is rubber seal or silica gel sealing ring.
The method have technical effect that:
A kind of gas cylinder by hydrostatic pressure test Special pressing head disclosed by the invention, simple and compact for structure, convenient to operation, seal reliable,Avoid gas cylinder in test process to bear axial force, improve the efficiency of test jobs, meet the automatization of automatic test production lineThe demand of operation, alleviates the labor intensity of workman, and improves the suitability.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the front view of connector.
Fig. 3 is sectional view at the A-A of Fig. 2.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
As shown in Fig. 1 ~ 3, the present invention includes the center-pole 5 of hollow tubular, and center-pole 5 slides in sleeve pipe 6, center-pole 5Can move up and down in sleeve pipe 6, center-pole 5 lower end is installed with nut 2, elastic seal ring 4 and pad 3 and is sleeved on sleeve pipe 6And on the center-pole 5 between nut 2, elastic seal ring 4 can be rubber seal or silica gel sealing ring, and the lower section of nut 2 setsHaving ball nut 1, ball nut 1 is for locking.The upper end of sleeve pipe 6 is provided with flange 601, and spiral shell is used by flange 601 in sleeve pipe 6 upper endBolt fixes the lower end connecting connector 8, and the upper end connecting connector 8 is fixed in the cylinder body lower end of cylinder 9, and connecting rod 11 passes through pressing plateThe upper end of the 10 fixing cylinder bodies connecting cylinder 9, connecting rod 11 can connect lifting drive source, lifting drive source drive whole gas cylinderWater pressure test Special pressing head lifts, and lifting drive source can be cylinder, oil cylinder or other lowering or hoisting gear.Connector 8 is two endsBeing provided with the cylinder of adpting flange 802, the adpting flange 802 at connector 8 two ends is respectively used to connect sleeve pipe 6 and the cylinder body of cylinder 9,The side of connector 8 cylinder is provided with the groove 801 extending to connector upper end, and the upper end of center-pole 5 extends in connector 8,One end of horizontally disposed high pressure connecting rod 7 passes the groove 801 of connector 8 the fixing upper end connecting center-pole 5, and high pressure is evenExtension bar 7 is provided with through hole 701, and through hole 701 connects the endoporus of center-pole 5, as the passage of testing high voltage water.The piston rod of cylinder 9901 extend in connector 8, and the piston rod 901 of cylinder 9 connects high pressure connecting rod 7, by cylinder 9 band dynamic high-pressure connecting rod 7 and inCore bar 5 moves up and down (high pressure connecting rod 7 can move up and down in groove 801).
In use, the lifting drive source of the connecting rod 11 connecting test equipment of the present invention, high-pressure water connects high pressure evenThe outer end of extension bar 7.When test, lifting drive source drives gas cylinder by hydrostatic pressure test Special pressing head to move downward；Elastic seal ring 4 is insertedEnter the import and export of gas cylinder, when the lower surface of sleeve pipe 6 and gas cylinder import and export end face close to and when not contacting, gas cylinder by hydrostatic pressure test is specialStop moving downward with pressure head, it is ensured that in test process, gas cylinder is not by axial force；Now, the piston rod 901 of cylinder 9 bounces back(during original state, the piston rod 901 of cylinder 9 stretches out, elastic seal ring 4 in the raw, the most by compression, such as shape in Fig. 1State), center-pole 5 is lifted up, nut 2 and the pad 3 of center-pole 5 lower end extrude elastic seal ring 4, make elastic seal ring 4Deformed dilation, thus between elastic seal ring 4 and the import and export of gas cylinder and elastic seal ring 4 and center-pole 5 faying face itBetween reach seal effect；When applied voltage test, high-pressure water is noted in tested gas cylinder through high pressure connecting rod 7, center-pole 5Entering water under high pressure and carry out applied voltage test, the pressure of gas cylinder internal is the highest, and pad 3 is the biggest to the extruding force of elastic seal ring 4, seals effectFruit is more preferably.After test terminates, the piston rod 901 of cylinder 9 stretches out, and center-pole 5 moves down, and nut 2 and pad 3 release elastic packingThe extruding of circle 4, elastic seal ring 4 recovers to original state, and lifting drive source drives gas cylinder by hydrostatic pressure test Special pressing head upwards to transportMove to starting point, complete applied voltage test operation.
The present invention relies on cylinder force extruding elastic seal ring deformed dilation to reach the effect sealed, gas cylinder import and exportPerforate can be straight hole, it is also possible to be taper hole, can be unthreaded hole, it is also possible to be screwed hole, all can realize sealing, substantially increaseThe suitability of gas cylinder by hydrostatic pressure test Special pressing head.Need not in operating process manually participate in, the efficiency of test jobs is high, can be used forAutomatic test production line, it is achieved the automatization of gas cylinder applied voltage test.