CN103835734B - The large flow hydraulic pressure of hydraulic prop triple-use valve - Google Patents
The large flow hydraulic pressure of hydraulic prop triple-use valve Download PDFInfo
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- CN103835734B CN103835734B CN201410131184.5A CN201410131184A CN103835734B CN 103835734 B CN103835734 B CN 103835734B CN 201410131184 A CN201410131184 A CN 201410131184A CN 103835734 B CN103835734 B CN 103835734B
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Abstract
The large flow hydraulic pressure of a kind of hydraulic prop triple-use valve, relates to hydraulic prop technical field, is made up of left valve cylinder, right valve cylinder, check valve, feather valve, safety valve and connecting screw rod. Wherein: safety valve is made up of valve seat, spool, valve pocket, spring base, safety valve spring, look nut and the vibration absorbing ring that is arranged on valve seat inside, spool is arranged on valve seat inside by cylindrical pair, valve seat is arranged on valve pocket inside by cylindrical pair, and valve pocket is arranged on right valve cylinder inside by cylindrical pair. Spool is by a roundlet shell of column and a concentric sliding valve structure of secondary that great circle shell of column forms; On the outer surface of roundlet shell of column and great circle shell of column, be equipped with micro forming structure; Roundlet shell of column also has radially spout hole and radially spout hole of row's secondary of row's one-level; Great circle shell of column also has several about the symmetrical axial damping hole of axis. The present invention can effectively solve the problem such as lubricated, cavitation erosion, wearing and tearing of safety valve in hydraulic pressure triple-use valve, has the advantages such as flow is large, shock resistance is strong.
Description
Technical field
The invention belongs to hydraulic prop technical field, specifically the large flow hydraulic pressure of a kind of hydraulic prop triple-use valve.
Background technology
Hydraulic prop is widely used in that generally adopt in colliery, high-grade common coal mining face supporting, combines to adopt end supporting and other are provisionalIn supporting. Traditional hydraulic prop and triple-use valve thereof all use emulsion for working media, and annual emulsion consumption existsMore than 6000t, and whole emulsions all sprays into goaf, finally flows in rivers lake and body of groundwater, and water body is caused seriouslyPollute; Compared with adopting emulsion, Water Hydraulics has safety and environmental protection, cheap, storage side taking water as working mediaJust, the various advantages such as low and strong adaptability of use cost. Simultaneously low, the poor lubricity of pure water viscosity, electric conductivity are strong, easily makeThe problems such as the burn into wearing and tearing of one-tenth valve parts, the vapor pressure of pure water is higher than oils vapor pressure in addition, therefore in pure water valve classThe restriction place of element easily forms parital vacuum and produces a large amount of air pockets, and air pocket enters higher-pressure region pressurized and crumbles and fall, and can produce partImpact and TRANSIENT HIGH TEMPERATURE, thereby cause element function to reduce, produce vibration, noise and wire drawing erosion, erosion, impact etc.,Shorten element service life. Therefore to reduce or eliminate above-mentioned phenomenon, except from the selection of material is considered, also shouldSet about from the structural design of Technique for Water Hydraulic Components and system.
Triple-use valve is the core component of hydraulic prop, the setting prop of hydraulic prop by triple-use valve control hydraulic prop, justSupport, carrying overflow and unloading prop drawing process. And triple-use valve is made up of check valve, safety valve and feather valve, safety valve whereinPerformance determined support effect and the security performance of hydraulic prop, be the crucial valve in triple-use valve. In view of monomer hydraulic props upThe working environment of post, in the time that top board sinks rapidly, when particularly top board is subject to intense impact, triple-use valve will have stronger shock resistancePerformance, and can, with the quick overflow off-load of large flow, realize pressure rapid adjustment, reduce pressure oscillation, hydraulic prop is returned fastThe demand that contracting is sunk fast to adapt to the large displacement of top board. If the moment flow of triple-use valve is too small, will cause hydraulic propCavity pressure moment sharply rises, and pressure oscillation is large, makes hydraulic prop occur swollen cylinder, string wet goods fault, when serious by prestigeSide of body periphery staff's personal safety. Therefore triple-use valve must have larger flow and stronger shock resistance, to fitThe demand of answering the fast large displacement of top board to sink.
Hydraulic pressure triple-use valve is exactly to use the triple-use valve that pure water is working media.
Micro forming technology is to process at surface of friction pair the microscopic appearance that rule distributes, to improve friction, wearing and tearing, greasy property,Change valve flow field, reduce cavitation erosion. And making spool there is the ability that stores small solid particle, micro forming technology is surfaceIn field of engineering technology, improve the technological means of surface of friction pair friction and wear characteristic, at mechanical seal, engine piston ring, push awayThe existing successful Application in field such as mechanical axis holds.
In order to solve the problem such as lubricated, cavitation erosion, wearing and tearing, impact of hydraulic prop hydraulic pressure triple-use valve, first of the present inventionThe patent of the Chinese patent publication No. CN103615270A that a person of good sense proposes discloses a kind of hydraulic prop hydraulic pressure triple-use valve. This waterPress the poppet valve core of triple-use valve check valve to be provided with the micro forming of miniature pit or groove, can there is additional dynamic pressure by micro formingFeature, and can store the characteristic of metal and dust granules, improve the friction pair performance of hydraulic pressure triple-use valve check valve poppet valve core,Improve interior flow field, reduce cavitation erosion; Poppet valve core has also adopted two-step throttle structure and high-pressure induct structure, efficiently solvesThe problem such as cavitation erosion, impact of hydraulic pressure triple-use valve check valve; On the face of cylinder of this external hydraulic pressure triple-use valve safety valve needle, also adoptMicro forming structure, this structure has certain effect to stability and safety valve needle tool. But the valve of hydraulic pressure triple-use valve safety valve in this patentCore adopts needle structure, thereby the maximum stream flow of hydraulic pressure triple-use valve is restricted, and micro forming structure is not arranged on safety valveThe band position of spool, has reduced the effect of micro forming hydrodynamic lubrication greatly.
The large flow hydraulic pressure of a kind of hydraulic prop triple-use valve the present invention relates to, has not only solved the profit of hydraulic pressure triple-use valve safety valveThe problems such as cunning, cavitation erosion, wearing and tearing, impact, also efficiently solve the large problems of liquid flow of hydraulic pressure triple-use valve, and make hydraulic pressure triple-use valveShock resistance improves greatly, and the stability of valve core movement is further strengthened.
Summary of the invention
Technical problem to be solved by this invention is to provide the large flow hydraulic pressure of a kind of hydraulic prop triple-use valve, is solving hydraulic pressureWhen the problems such as lubricated, the cavitation erosion of triple-use valve safety valve, wearing and tearing, impact, also there is larger flow and stronger shock resistancePerformance. Technical problem to be solved by this invention realizes by the following technical solutions.
The large flow hydraulic pressure of a kind of hydraulic prop triple-use valve, comprises left valve cylinder, right valve cylinder, check valve, feather valve, safety valveAnd connecting screw rod, between left valve cylinder and right valve cylinder, being threaded connection, check valve, feather valve and safety valve are arranged on left valve cylinder successivelyWith the inside of right valve cylinder, between check valve and safety valve, connect by connecting screw rod, feather valve be arranged on check valve and safety valve itBetween.
Described check valve is made up of fluid injection valve body, stop collar, one-way valve seat, gland nut, steel ball and one-way valve spring. NoteBetween liquid valve body and connecting screw rod, be threaded connection, between fluid injection valve body and connecting screw rod, stop collar, check valve be housed successivelyValve seat, gland nut, steel ball and one-way valve spring. This through type screw connection structure makes the structure of check valve compacter;According to " contact firmly, soft seal " design principle, one-way valve seat material adopts high-strength rubber, to increase steel ball and check valveThe sealing property of valve seat, realizes zero leakage sealing; One-way valve spring is volute spring, can effectively prevent that steel ball from rotating, and increases singleThe stability of opening to valve; And ball face sealing also has and is quick on the draw, the advantage such as contamination resistance is strong.
Described safety valve is made up of valve seat, spool, valve pocket, spring base, safety valve spring and look nut. Described its feature existsIn: described valve pocket is arranged on right valve cylinder inside by cylindrical pair, between valve pocket and connecting screw rod, is threaded connection, and spool is by circlePost pair is arranged on valve seat inside, and valve seat is arranged on valve pocket inside by cylindrical pair, and look nut is arranged on valve pocket end by screw thread,Spring base is connected by ball is secondary with valve core chamber, and the two ends of safety valve spring are pressed on respectively on spring base and look nut.
Described spool is by a roundlet shell of column and a concentric sliding valve structure of secondary that great circle shell of column forms. Roundlet shell of column and great circleShell of column forms cylindrical pair with small cylindrical opening and the big column hole of valve seat inside respectively, and therefore the concentric sliding valve structure of secondary can increase valveThe stability of core, prevents that stuck phenomenon from appearring in spool.
Described safety valve also comprises the vibration absorbing ring that is arranged on valve seat inside. Vibration absorbing ring adopts high-strength rubber to make, and is arranged on valve seatIn inner groove, in the time that the end face of the great circle shell of column of spool moves to vibration absorbing ring position and contacts with vibration absorbing ring under action of hydraulic force,The vibration absorbing ring of quality of rubber materials can effectively absorb motion and the vibrational energy of spool, plays the effect of noise elimination absorbing.
The roundlet shell of column of described spool has radially spout hole and radially spout hole of row's secondary of row's one-level. Strongly rush at top boardHit under effect, hydraulic prop cavity pressure moment rises, and the hydraulic coupling acting on spool is greater than safety valve spring precompressionTime, spool move outward force one-level radially spout hole open rapidly, start large flow overflow, reduce pressure oscillation, make hydraulic propBounce back fast, realize the rapid adjustment of pressure; But when impact very strong so that one-level radially spout hole after opening completely stillEffectively when controlled pressure, spool continues outer moving, and secondary radially spout hole will be opened, and excess flow further increases, monomerHydraulic prop cavity pressure will reduce rapidly. Adopt radially spout hole and the secondary overflow mode that radially spout hole combines of one-level,Can effectively limit the maximum of hydraulic prop cavity pressure, thereby avoid because hypertonia is to hydraulic prop and water thereofPressure triple-use valve damages, and has stronger shock resistance.
The great circle shell of column of described spool has several about the symmetrical axial damping hole of axis. Axially damping hole is on the one hand by valveThe cavity forming between core and valve seat is communicated with the cavity of connecting screw rod inside, avoids spool and valve base chamber to form sealed volume and hindersHinder valve core movement; On the other hand under static state, axially the pressure at damping hole two ends equates, but in the time of valve core movement, spoolChange with the pressure of valve base chamber cavity, axially the effect of small damping is played in the resistance of the liquid of damping hole, can improve valve core movementStability.
On the roundlet shell of column of described spool and the outer surface of great circle shell of column, be equipped with micro forming structure. Described micro forming structure is profitProcess by Surface Texture technology by micro-hole of certain regular distribution or micro-groove. Thereby can be by micro-hole of micro forming or micro-Groove stores the metal and the dust granules that enter seal spool band, thereby improves antipollution, the wear resistance of spool friction pair;Simultaneously micro-hole of micro forming or micro-groove can also storage of liquids media, and liquid medium can the fine lubricant effect that improves band; ThisThe hydrodynamic lubrication mechanism of outer micro forming can effectively be improved the interior flow field of band, reduces cavitation erosion, improves the steady of valve core movementQualitative.
Described spool adopts martensite stainless steel material, and the metal base surface of described valve seat adopts metal surface ceramic coatedTechnical finesse, to improve the anticorrosive and wear resistance of spool and valve seat.
The main body of described feather valve is by unloading valve pad and unloaded spring forms, and unloading valve pad is arranged on fluid injection valve body bottom, forCan simplify the parts of hydraulic pressure triple-use valve, make the structure of hydraulic pressure triple-use valve compacter, unloaded spring one end is pressed on left valve cylinderOn the end face of inner annular boss, the unloaded spring other end is pressed on the valve pocket of safety valve, due to valve pocket and the company of safety valveConnect between screw rod and be threaded connection, between fluid injection valve body and connecting screw rod, be also threaded connection, therefore the elastic force of unloaded spring successivelyAct on unloading valve pad by valve pocket, connecting screw rod, the fluid injection valve body of safety valve, force unloading valve pad to be tightly pressed in left valve cylinderOn the other end of inner annular boss, thus the sealing of formation feather valve. Because the annular boss of left valve cylinder inside is metalMaterial, in order to increase the reliability of sealing, according to " contact firmly, soft seal " design principle, the material of unloading valve pad is high-strengthDegree rubber.
The invention has the beneficial effects as follows, provide the large flow hydraulic pressure of a kind of hydraulic prop triple-use valve, the sealing of safety valve spoolBand adopts Surface Texture technical finesse, process lubricated, cavitation erosion that micro forming can effectively solve hydraulic pressure triple-use valve safety valve, wearing and tearing,The problems such as impact; The present invention also adopts the concentric sliding valve structure of two-stage, has that flow is large, valve core movement is without stuck feature; In additionThe present invention adopt also adopt one-level radially spout hole and secondary radially spout hole combine, and on spool, have axial damping hole,In valve seat, set up vibration absorbing ring, effectively increasing on the basis of stability of valve core movement, can also effectively limit monomer hydraulic and prop upMaximum pressure value in post chamber, prevents that hypertonia from causing the damage of hydraulic prop and parts thereof.
Brief description of the drawings
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is safety valve partial structurtes schematic diagram of the present invention;
Fig. 3 is the valve core structure schematic diagram of the spool of safety valve while being processed with micro-hole micro forming;
Fig. 4 is the valve core structure schematic diagram of the spool of safety valve while being processed with micro-groove micro forming;
In figure: 1. left valve cylinder; 2. right valve cylinder; 3. check valve; 4. feather valve; 5. safety valve; 6. connecting screw rod; 7.O shape is closeSeal I; 8.O shape sealing ring II; 9.O shape sealing ring III; 11. annular boss; 21. unloading holes; 31. fluid injection valve bodies; 32. limitsPosition cover; 33. one-way valve seats; 34. gland nuts; 35. steel balls; 36. one-way valve springs; 41. unloading valve pads; 42. unloading bulletsSpring; 51. valve seats; 52. spools; 53. valve pockets; 54. spring bases; 55. safety valve springs; 56. look nuts; 521. small columnSection; 522. great circle shell of columns; Radially spout hole of 523. one-levels; Radially spout hole of 524. secondarys; 525. axial damping holes; 526. micro-Hole; 527. micro-grooves.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction withSpecific embodiment and diagram, further set forth the present invention.
As shown in Figure 1, the large flow hydraulic pressure of a kind of hydraulic prop triple-use valve, comprise left valve cylinder 1, right valve cylinder 2, check valve 3,Feather valve 4, safety valve 5 and connecting screw rod 6, be threaded connection check valve 3, feather valve between left valve cylinder 1 and right valve cylinder 24 and safety valve 5 be arranged on successively the inside of left valve cylinder 1 and right valve cylinder 2, between check valve 3 and safety valve 5 by connecting spiral shellBar 6 connects, and feather valve 4 is arranged between check valve 3 and safety valve 5.
As shown in Figure 1, described check valve 3 by fluid injection valve body 31, stop collar 32, one-way valve seat 33, gland nut 34,Steel ball 35 and one-way valve spring 36 form. Between fluid injection valve body 31 and connecting screw rod 6, be threaded connection, at fluid injection valve body 31And between connecting screw rod 6, stop collar 32, one-way valve seat 33, gland nut 34, steel ball 35 and check valve bullet are housed successivelySpring 36. This through type screw connection structure makes the structure of check valve 3 compacter; According to " contact firmly, soft seal " designPrinciple, one-way valve seat 33 materials adopt high-strength rubber, to increase the sealing property of steel ball 35 and one-way valve seat 33, realExisting zero leakage sealing; One-way valve spring 36 is volute spring, can effectively prevent that steel ball 35 from rotating, and increase check valve 3 is openedStability; And ball face sealing also has and is quick on the draw, the advantage such as contamination resistance is strong.
As depicted in figs. 1 and 2, described safety valve 5 is by valve seat 51, spool 52, valve pocket 53, spring base 54, safety valve bulletSpring 55 and look nut 56 form. Described it is characterized in that: described valve pocket 53 is arranged on right valve cylinder 2 inside by cylindrical pair,Between valve pocket 53 and connecting screw rod 6, be threaded connection, spool 52 is arranged on valve seat 51 inside by cylindrical pair, and valve seat 51 is logicalCross cylindrical pair and be arranged on valve pocket 53 inside, look nut 56 is arranged on valve pocket 53 ends, spring base 54 and spool by screw thread52 connect by ball is secondary, and the two ends of safety valve spring 55 are pressed on respectively on spring base 54 and look nut 56.
Described spool 52 is by a roundlet shell of column 521 and a concentric sliding valve structure of secondary that great circle shell of column 522 forms. RoundletShell of column 521 and great circle shell of column 522 form cylindrical pair with small cylindrical opening and the big column hole of valve seat 51 inside respectively, and therefore secondary is sameHeart sliding valve structure can increase the stability of spool 52, prevents that stuck phenomenon from appearring in spool 52.
Described safety valve 5 also comprises the vibration absorbing ring 57 that is arranged on valve seat 51 inside. Vibration absorbing ring 57 adopts high-strength rubber to make,Be arranged in the groove of valve seat 51 inside, when the end face of the great circle shell of column 522 of spool 52 moves to weakening under action of hydraulic forceWhen encircling 57 positions and contacting with vibration absorbing ring 57, the vibration absorbing ring 57 of quality of rubber materials can effectively absorb motion and the vibrational energy of spool 52,Play the effect of noise elimination absorbing.
The roundlet shell of column 521 of described spool 52 has radially spout hole 523 and radially spout hole 524 of row's secondary of row's one-level.Under the effect of top board intense impact, hydraulic prop cavity pressure moment rises, and the hydraulic coupling acting on spool 52 is greater than peaceWhen full valve spring 55 precompression, spool 52 is outer move force one-level radially spout hole 523 open rapidly, start large flow overflow,Reduce pressure oscillation, hydraulic prop is bounced back fast, realize the rapid adjustment of pressure; But, so that one-level very strong when impactingRadially spout hole 523 is after opening completely still effectively when controlled pressure, and spool 52 continues outer moving, and secondary is spout hole radially524 will open, and excess flow further increases, and hydraulic prop cavity pressure will reduce rapidly. Adopt radially overflow of one-levelHole 523 and the secondary overflow mode that radially spout hole 524 combines, can effectively limit the maximum of hydraulic prop cavity pressureValue, thus avoid because of hypertonia to hydraulic prop and and hydraulic pressure triple-use valve damage, there is stronger impact resistanceEnergy.
The great circle shell of column 522 of described spool 52 has several about the symmetrical axial damping hole 525 of axis. Axially damping hole525 are communicated with the cavity forming between spool 52 and valve seat 51 on the one hand with the cavity of connecting screw rod 6 inside, avoid spool 52And between valve seat 51, form sealed volume and hinder spool 52 and move; On the other hand under static state, 525 liang of axial damping holesThe pressure of end equates, but in the time that spool 52 moves, between spool 52 and valve seat 51, the pressure of cavity changes, axially damping holeThe effect of small damping is played in 525 liquid resistance, can improve the stability that spool 52 moves.
As shown in Figure 3 and Figure 4, on the roundlet shell of column 521 of described spool 52 and the outer surface of great circle shell of column 522, be equipped with micro-makingType structure. Described micro forming structure be utilize that Surface Texture technology processes by micro-hole 526 of certain regular distribution or micro-ditchGroove 527. Thereby can store the metal and the dust that enter spool 52 bands by micro-hole 526 of micro forming or micro-groove 527Particle, thereby antipollution, the wear resistance of raising spool 52 friction pairs; Micro-hole 526 or micro-groove 527 of micro forming simultaneouslyCan also storage of liquids medium, liquid medium can the fine lubricant effect that improves band; In addition the hydrodynamic lubrication mechanism energy of micro formingEffectively improve the interior flow field of band, reduce cavitation erosion, improve the stability that spool 52 moves.
Described spool 52 adopts martensite stainless steel material, and the metal base surface of described valve seat 51 adopts metal surface sprayBe coated with ceramic technology processing, to improve the anticorrosive and wear resistance of spool 52 and valve seat 51.
As shown in Figure 1, the main body of described feather valve 4 is by unloading valve pad 41 and unloaded spring 42 forms, and unloading valve pad 41 is arranged onFluid injection valve body 31 bottoms, in order to simplify the parts of hydraulic pressure triple-use valve, make the structure of hydraulic pressure triple-use valve compacter, unloadingSpring 41 one end are pressed on the end face of annular boss 11 of left valve cylinder 1 inside, and unloaded spring 41 other ends are pressed on safety valve 5On valve pocket 53, owing to being threaded connection between the valve pocket 53 of safety valve 5 and connecting screw rod 6, between fluid injection valve body 31 and connecting screw rod 6 alsoBe threaded connection, therefore the elastic force of unloaded spring 42 is successively by valve pocket 53, connecting screw rod 6, the fluid injection valve body 31 of safety valve 5Act on unloading valve pad 41, force unloading valve pad 41 to be tightly pressed on the other end of annular boss 11 of left valve cylinder 1 inside, fromAnd the sealing of formation feather valve 4. Because the annular boss 11 of left valve cylinder 1 inside is metal material, in order to increase the reliability of sealing,According to " contact firmly, soft seal " design principle, the material of unloading valve pad 41 is high-strength rubber.
As depicted in figs. 1 and 2, close by O-ring seals I 7 between the left valve cylinder 1 of hydraulic pressure triple-use valve and right valve cylinder 2 and hydraulic propEnvelope, seals by O-ring seals II 8 between valve base of safety valve 51 and valve pocket 53, passes through O-ring seals III 9 between spool 52 and valve seat 51Further sealing.
Hydraulic pressure triple-use valve is the core component of hydraulic prop, and hydraulic prop is by hydraulic pressure triple-use valve control hydraulic propSetting prop, just support, carrying overflow and unloading prop drawing process, its course of work is as follows:
Setting prop, first support stage: first the fluid injection gun of hydraulic prop is inserted on the fluid injection valve body 31 of hydraulic pressure triple-use valve, hang up properly lockTight cover, plate moves fluid injection gun spanner, forces push rod to move axially, and jack-up steel ball 35 is opened check valve 3, from the highly pressurised liquid of pumping plantJust by the through hole of check valve 3 and connecting screw rod 6 inside, inject hydraulic pressure triple-use valve inside, and by the through hole on left valve cylinder 1 sidewallEnter hydraulic prop inside, hydraulic prop is risen rapidly, when after hydraulic prop contact back timber, top board produces hydraulic propRaw certain resistance, hydraulic prop stops rising, and hydraulic prop internal pressure sharply rises, and final hydraulic prop is pressed in chamberPower equals pump station pressure, and obtains certain setting load, now takes off fluid injection gun, and check valve 3 is closed, and completes setting prop, just supportsJourney.
The carrying overflow stage: top board can apply a dead load slowly increasing or sharply increase hydraulic prop in Bracing ProcessThe shock loading adding and cyclic loading, in the time that load value exceedes the working resistance of hydraulic prop, in chamber operation medium inHydraulic coupling on spool 52 is greater than the pretightning force of safety valve spring 55, and will force outside spool 52 and move, and compressing secure valve spring 55,And the working media in the cavity of formation flows out by axial damping hole 525 between spool 52 and valve seat 51, when moving to one-level outside spool 52Radially when spout hole 523 critical unlatching, in chamber, operating pressure reaches the rated operating pressure of hydraulic pressure triple-use valve, if cavity pressure enters oneStep improve, will force one-level radially spout hole 523 open rapidly, start large flow overflow, reduce pressure oscillation, make hydraulic propRetraction fast, hydraulic coupling reduces, and one-level radially spout hole 523 is closed, and realizes the rapid adjustment of pressure; If impact very strong,So that one-level is after radially spout hole 523 is opened completely, act on hydraulic coupling on spool 52 still large than the elastic force of safety valve spring 55Time, spool 52 moves outer continuation, and secondary radially spout hole 524 will be opened, and safety valve spring 55 elastic force further increase simultaneously, overflowStream flow further increases, and hydraulic prop further bounces back, and hydraulic prop cavity pressure will reduce rapidly, when acting on valveHydraulic coupling on core 52 is when being less than the elastic force of safety valve spring 55, and spool 52 travelling backwards, close radially spout hole 524 of secondary successivelyWith radially spout hole 523 of one-level, thereby ensure that cavity pressure fluctuates all the time near safety valve rated operating pressure, realize constant-resistance and prop upSupport.
The unloading prop drawing stage: the single hydraulic prop back time receiving, insert in the unloading hole 21 of right valve cylinder 2 by unloading handgrip, plate is moving to be unloadedCarry handgrip, produce one along the axial power of hydraulic pressure triple-use valve, act on valve pocket 53 ends, compress unloaded spring 42 by valve pocket 53,Now and between the outer inner annular boss 11 that moves, unloads valve pad 41 and left valve cylinder 1 of connecting screw rod 6 that is threaded connection of valve pocket 53Band is opened, and feather valve 4 is opened, and in hydraulic prop chamber, working media sprays into goaf, hydraulic supporting through left valve cylinder 1Post bounces back fast under deadweight and action of reset spring, after hydraulic prop bounces back completely, closes feather valve 4, completes unloading prop drawingProcess.
More than show and described general principle of the present invention, principal character and advantage. The technical staff of the industry should understand,The present invention is not restricted to the described embodiments, and that in above-described embodiment and description, describes just illustrates general principle of the present invention,Without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fallEnter in the claimed scope of the invention. The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1. the large flow hydraulic pressure of a hydraulic prop triple-use valve, comprises left valve cylinder (1), right valve cylinder (2), check valve (3), unloadingValve (4), safety valve (5) and connecting screw rod (6), be threaded connection between left valve cylinder (1) and right valve cylinder (2), check valve (3), unloadsCarry valve (4) and safety valve (5) and be arranged on successively the inside of left valve cylinder (1) and right valve cylinder (2), between check valve (3) and safety valve (5)Connect by connecting screw rod (6), feather valve (4) is arranged between check valve (3) and safety valve (5), and described safety valve (5) comprises valveSeat (51), spool (52), valve pocket (53), spring base (54), safety valve spring (55) and look nut (56), described valve pocket (53)Be arranged on right valve cylinder (2) inside by cylindrical pair, between valve pocket (53) and connecting screw rod (6), be threaded connection, spool (52) passes throughCylindrical pair is arranged on valve seat (51) inside, and valve seat (51) is arranged on valve pocket (53) inside by cylindrical pair, and look nut (56) passes throughScrew thread is arranged on valve pocket (53) end, is connected the two ends of safety valve spring (55) between spring base (54) and spool (52) by ball is secondaryBe pressed on respectively spring base (54) and look nut (56) upper, described safety valve (5) also comprises the weakening that is arranged on valve seat (51) insideRing (57), is characterized in that:
Described spool (52) is the concentric sliding valve structure of secondary being made up of a roundlet shell of column (521) and a great circle shell of column (522);
The roundlet shell of column (521) of described spool (52) has radially spout hole (523) and radially spout hole of row's secondary of row's one-level(524)；
The great circle shell of column (522) of described spool (52) has several about the symmetrical axial damping hole (525) of axis;
On the roundlet shell of column (521) of described spool (52) and the outer surface of great circle shell of column (522), be equipped with micro forming structure.
2. the large flow hydraulic pressure of a kind of hydraulic prop according to claim 1 triple-use valve, is characterized in that: described is micro-Modeling structure be utilize that Surface Texture technology processes by micro-hole (526) of certain regular distribution or micro-groove (527).
3. the large flow hydraulic pressure of a kind of hydraulic prop according to claim 1 triple-use valve, is characterized in that: described valveCore (52) adopts martensite stainless steel material.
4. the large flow hydraulic pressure of a kind of hydraulic prop according to claim 1 triple-use valve, is characterized in that: described valveThe metal base surface of seat (51) adopts the ceramic coated technical finesse in metal surface.
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| CN201410131184.5A CN103835734B (en) | 2014-04-02 | 2014-04-02 | The large flow hydraulic pressure of hydraulic prop triple-use valve |
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| CN103835734B true CN103835734B (en) | 2016-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104500111B (en) * | 2014-12-11 | 2017-03-15 | 中煤北京煤矿机械有限责任公司 | Two-stage open-type high-flow safety valve |
| CN106382125B (en) * | 2016-12-01 | 2018-05-08 | 安徽理工大学 | Colliery pressure three-purpose valve based on micro forming spool and special-shaped valve chamber |
| CN107762542A (en) * | 2017-10-26 | 2018-03-06 | 鸿大智能机械有限公司 | The regulator of automatic unloading hydraulic control one-way valve |
| CN109065340B (en) * | 2018-08-22 | 2020-11-24 | 扬州鑫宝利金属制品有限公司 | Electric power vibration damping ring |
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| CN203742631U (en) * | 2014-04-02 | 2014-07-30 | 安徽理工大学 | High-flow pressure triple-purpose valve of individual hydraulic prop |
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2014
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| CN103615270A (en) * | 2013-11-28 | 2014-03-05 | 安徽理工大学 | Single hydraulic prop hydraulic pressure three-purpose valve |
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