CN102996557A - Pressure adjustable buffer overflow valve - Google Patents
Pressure adjustable buffer overflow valve Download PDFInfo
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- CN102996557A CN102996557A CN2012105776560A CN201210577656A CN102996557A CN 102996557 A CN102996557 A CN 102996557A CN 2012105776560 A CN2012105776560 A CN 2012105776560A CN 201210577656 A CN201210577656 A CN 201210577656A CN 102996557 A CN102996557 A CN 102996557A
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Abstract
The invention discloses a pressure adjustable buffer overflow valve which comprises a valve body and a valve core slidingly installed in a valve cavity of the valve body, wherein a valve core reset spring is sleeved in the valve core, an oil outlet and an oil discharging port communicated with the valve cavity are respectively arranged on the valve body, a valve base in liquid sealing butting matching with the valve core is arranged on a valve port of the valve cavity, a pressure oil port is arranged on the valve base, an assembling cavity is arranged on the rear section of the valve cavity in coaxial expanding mode, an adjusting thread sleeve for adjusting buffer pre-tightening pressure of the valve core rest spring in spiral mode and with the length extending out of the assembling cavity is assembled in the assembling cavity in spiral mode, a buffer piston assembly forming a secondary buffer assembly structure with the valve core in matching mode is sleeved in the adjusting thread sleeve in guiding mode, a front section body in inserting assembly is arranged in the valve body, the oil outlet and the oil discharging port are both arranged on the front section body of the valve body, and the valve core can open or close a connection channel between a pressure oil port and the oil outlet in horizontal sliding mode for eliminating or absorbing hydraulic pulse of the pressure oil port.
Description
Technical field
The present invention relates to the hydraulic control technology in the engineering machinery, particularly a kind of buffer overflow valve for hydraulic system, specifically a kind of adjustable-pressure buffer overflow valve.
Background technique
Hydraulic rotary motor on the well-known engineering machinery excavator owing to the reason of inertia can cause system's hydraulic pressure moment eustasy to produce pressure surge, thereby brings larger impact to hydraulic system in starting and the process that stops.This impact greatly reduces the manoeuvring performance of excavator, and severe patient even can damage other hydraulic unit in the hydraulic system causes machine life to shorten.In the prior art, buffer relief valve is installed in the hydraulic system usually is used for pressure pulse in the buffer system to improve the manoeuvring performance of equipment.But common buffer relief valve not only pipeline linker is complicated; and be installed in the pipeline of system and can not bring into play better the overflow protective action; moreover its secondary overflow compensator or trimmer pressure of common buffer relief valve is set when dispatching from the factory usually; general being difficult to or the very inconvenient manual tune of carrying out according to actual needs again; therefore can not eliminate better with absorption system in compression shock, satisfy the usage requirement of current hydraulic rotary motor.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, has compact structure, stable performance and a kind of adjustable-pressure buffer overflow valve easy to adjust are installed easily and provide.This relief valve volume is little, lightweight and can directly be inserted on the hydraulic rotary motor, eliminates, absorbs the compression shock that brings because of main frame revolution inertia itself, makes the main frame revolution reach that starting is steady, the stably effect of stopping.
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of adjustable-pressure buffer overflow valve, comprise that valve body and slip are fitted in the spool in the valve body valve pocket, valve core housing is equipped with the valve core reset spring, be shaped with respectively the oil outlet and the drain tap that are communicated with valve pocket on the valve body, and the accent of this valve pocket is fitted with the valve seat that cooperates with spool liquid sealing apical grafting, valve seat is shaped with the pressure hydraulic fluid port, the coaxial expansion of the back segment of valve pocket is shaped with assembly cavity, spiral is fitted with length and extends the adjusting silk braid that assembly cavity is used for adjustable diameter and screw adjusting valve core reset spring buffering preload pressure in this assembly cavity, and guide sleeve is equipped with to be slidingly matched with spool and consists of the damper piston assembly with two-stage buffering composite structure in this adjusting silk braid, valve body is shaped with the equipped front segment body of plug-in type, oil outlet and drain tap all are positioned on the front segment body of valve body, the spool formula that horizontally slips open or occluding pressure hydraulic fluid port and oil outlet between connecting passage be used for eliminating and the hydraulic impulse of absorption pressure hydraulic fluid port.
For optimizing technique scheme, the concrete measure of taking also comprises:
Above-mentioned damper piston assembly comprises damper piston and piston bushing, damper piston is shaped with the cylinder-piston chamber of joining with spool liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber between this cylinder-piston chamber and spool ear end face, the center, the back side of described damper piston seal boss is shaped with the traveller that extends back, the traveller guiding of piston bushing and damper piston is slided to be nested and is joined, and be formed with secondary hydraulic cushion chamber between the back side of piston bushing and damper piston seal boss, damper piston is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber and secondary hydraulic cushion chamber, and the radial hole that is shaped with on the axial bore that this oil inlet passage is shaped with by the bottom surface in cylinder-piston chamber and the traveller forms.
Above-mentioned adjusting silk braid is shaped with axial perforation with the slide opening of two road ring-shaped steps, the damper piston assembly is fitted in this slide opening, piston bushing is shaped with the location ring surface, this location ring surface matches with the second annular table terrace location thrust of slide opening, be formed with the damping chamber between the annular front-end face of damper piston seal boss and the first annular step surface, and damper piston is shaped with the radially damping hole that is communicated with one-level hydraulic cushion chamber and damping chamber, and the periphery wall in damper piston cylinder-piston chamber and the ring-shaped periphery of seal boss slide with the inwall liquid sealing of the inwall of regulating silk braid first segment slide opening and second section slide opening respectively and match.
Spiral is fitted with screw plug in the 3rd joint slide opening of above-mentioned adjusting silk braid, this screw plug matches with the piston bushing positioning and locking, screw plug is shaped with the cylinder cavity, and the diapire of this cylinder cavity matches with the spacing apical grafting of the breech face of damper piston traveller, and screw plug is set with the first seal ring.
Above-mentioned adjusting silk braid is positioned at the periphery wall of first segment slide opening and is positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening regulates outside thread and locking outside thread, be shaped with the adjusting internal thread suitable with this adjusting outside thread in the assembly cavity of valve body, spiral is equipped with locking nut on the adjusting silk braid, this locking nut is shaped with and the locking internal thread of locking the outside thread spiral and cooperating, and the apical grafting face of locking nut matches with the valve rear end face of valve body location apical grafting.
Be formed with annular space draining passage between the periphery wall of above-mentioned adjusting silk braid second section slide opening and the inwall of valve body assembly cavity, and the periphery wall rear portion of second section slide opening is shaped with the boss body with the sealing circular groove, sealing is equipped with in the circular groove for the second seal ring that is sealed and matched with the valve body assembly cavity, regulate on the silk braid and be shaped with respectively axial the first draining duct that is connected with annular space draining passage front port and the second draining duct that is connected with annular space draining passage rear port, the second draining duct recedes and connects the second section slide opening, and piston bushing is shaped with for the draining connecting passage that is communicated with screw plug cylinder cavity and the second draining duct.
Above-mentioned spool comprises valve head body and the valve-rod body that one links to each other, and this spool is shaped with the spool oil duct that is used for being communicated with pressure hydraulic fluid port and one-level hydraulic cushion chamber of axial perforation valve head body and valve-rod body, be positioned at valve head body place in the spool oil duct and be shaped with the narrow and small damping duct of bore, the valve core reset spring is sleeved on the valve-rod body of spool, one end of this valve core reset spring and valve head body phase apical grafting, its the other end is pressed with the front-end face top of regulating silk braid through pad and is matched, and the cylinder-piston chamber flip sleeve of damper piston fits over the afterbody of valve-rod body.
The outer peripheral surface of above-mentioned spool valve head body slides with the inner circle wall liquid sealing of valve body valve pocket and matches, this valve head body is divided into the ante-chamber that is positioned at valve head body front portion and the back cavity that is positioned at the valve-rod body rear portion with valve pocket, drain tap is positioned at back cavity, and the cylinder cavity of screw plug is connected with drain tap through draining connecting passage, the second draining duct, annular space draining passage, the first draining duct and back cavity successively.
Above-mentioned oil outlet is positioned at the ante-chamber that the valve head body is cut apart, the front-end face of described valve head body is shaped with the taper sealing face that cooperates with valve seat pressure hydraulic fluid port peripheral sealing apical grafting, and the connecting passage between pressure hydraulic fluid port and oil outlet is formed by the disengaging of this taper sealing face and valve seat pressure hydraulic fluid port periphery.
Be shaped with on the segment body before the above-mentioned valve body and make things convenient for the spiral equipped valve body outside thread of pegging graft, and should front segment body upper in square set is furnished with behind the valve body outside thread the valve seals of plug-in mounting seal action.
Compared with prior art, spiral is equipped with the adjusting silk braid for regulating spool reset spring buffering preload pressure in the valve body of the present invention, can set easily the working pressure of relief valve according to the requirement of system's actual conditions by regulating silk braid, and guide sleeve is equipped with to be slidingly matched with spool and consists of the damper piston assembly with two-stage buffering composite structure in the adjusting silk braid, the two-stage buffer capacity is the pressure pulse of absorption pressure hydraulic fluid port better, reach the purpose of eliminating system pressure impact, and then the working life of improving system's hydraulic element, guarantee that host computer system has good maneuverability.Valve body of the present invention is shaped with the equipped front segment body of plug-in type, thereby can directly be inserted on the hydraulic rotary motor, has greatly simplified the installation procedure of relief valve, has improved the efficiency of assembling of valve.Advantage of the present invention is: structure is bolted and gathers, volume is little, lightweight and pressure is adjustable, and adopts spiral plug-in type project organization to have characteristics easy for installation.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of valve body among Fig. 1;
Fig. 3 is the assembly structure schematic representation of spool among Fig. 1;
Fig. 4 is the structural representation of damper piston assembly among Fig. 1;
Fig. 5 is the structural representation of regulating silk braid among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is to Figure 5 shows that structural representation of the present invention.
Reference character wherein is: oil outlet B, drain tap T, pressure hydraulic fluid port P, one-level hydraulic cushion chamber E, axial bore E1, damping chamber F, annular space draining passage K, the first draining duct K1, the second draining duct K2, draining connecting passage K3, secondary hydraulic cushion chamber G, radial hole G1, damping hole M radially, the first seal ring O1, the second seal ring O2, valve seals O3, valve body 1, valve pocket 1a, assembly cavity 1b, regulate internal thread 1c, front segment body 11, valve body outside thread 11a, valve rear end face 12, spool 2, spool oil duct 2a, damping duct 2b, valve head body 21, taper sealing face 21b, outer peripheral surface 211, valve-rod body 22, valve core reset spring 3, valve seat 4, regulate silk braid 5, regulate outside thread 5a, locking outside thread 5b, first segment slide opening 51, second section slide opening 52, the first annular step surface 521, boss body 522, sealing circular groove 523, the 3rd joint slide opening 53, the second annular table terrace 531, damper piston assembly 6, damper piston 61, cylinder-piston chamber 61a, annular front-end face 61b, seal boss 611, traveller 612, location ring surface 621, periphery wall 61c, ring-shaped periphery 61d, piston bushing 62, screw plug 7, cylinder cavity 71, pad 8, locking nut 9.
Extremely shown in Figure 5 such as Fig. 1, a kind of adjustable-pressure buffer overflow valve of the present invention, comprise that valve body 1 and slip are fitted in the spool 2 among the valve body 1 valve pocket 1a, described spool 2 is set with valve core reset spring 3, wherein: from Fig. 1 in conjunction with seeing Fig. 2, be shaped with respectively the oil outlet B and the drain tap T that are communicated with valve pocket 1a on the valve body 1, and the accent of this valve pocket 1a is fitted with the valve seat 4 that cooperates with spool 2 liquid sealing apical graftings, valve seat 4 is shaped with pressure hydraulic fluid port P, the coaxial expansion of the back segment of valve pocket 1a is shaped with assembly cavity 1b, spiral is fitted with length and extends the adjusting silk braid 5 that assembly cavity 1b is used for adjustable diameter and screw adjusting valve core reset spring 3 buffering preload pressures among this assembly cavity 1b, and guide sleeve is equipped with to be slidingly matched with spool 2 and consists of the damper piston assembly 6 with two-stage buffering composite structure in this adjusting silk braid 5, valve body 1 is shaped with the equipped front segment body 11 of plug-in type, oil outlet B and drain tap T all are positioned on the front segment body 11 of valve body 1, spool 2 is at the connecting passage between left and right sides sliding type opening or occluding pressure hydraulic fluid port P and oil outlet B under the acting in conjunction of the hydraulic pressure of pressure hydraulic fluid port P and valve core reset spring 3 and damper piston assembly 6, reaches to eliminate and the purpose of absorption pressure hydraulic fluid port P hydraulic impulse.Compare with conventional art, valve body 1 of the present invention adopts spiral plug-in type project organization, valve body 1 is shaped with the equipped front segment body 11 of plug-in type, as shown in Figure 2, be shaped with on the front segment body 11 and make things convenient for the spiral equipped valve body outside thread 11a that pegs graft, and should before be positioned at the valve seals O3 that square set behind the valve body outside thread 11a has been furnished with the plug-in mounting seal action on segment body 11.Thereby the present invention can directly be inserted on the hydraulic rotary motor, easy installation and removal, and it is complicated to have broken away from traditional relief valve installation procedure, connects the present situation of difficulty.Be equipped with among the assembly cavity 1b of valve body 1 of the present invention simultaneously and regulate silk braid 5, by regulating the very easily preload pressure of regulation relief valve of silk braid 5, reached the adjustable purpose of pressure.Regulate that being set with in the silk braid 5 is slidingly matched with spool 2 consists of the damper piston assembly 6 with two-stage buffering composite structure, the two-stage buffer capacity is the pressure pulse of absorption pressure hydraulic fluid port P better, reach the purpose of eliminating system pressure impact, and then the working life of improving system's hydraulic element, guarantee that host computer system has good maneuverability.The present invention have structure be bolted gather, volume is little, lightweight and characteristics that pressure is adjustable.Can eliminate better and the absorption system pressure pulse, the main frame revolution be reached start steady, the stably effect of stopping
Among the embodiment, as shown in Figure 4, damper piston assembly 6 comprises damper piston 61 and piston bushing 62, damper piston 61 is shaped with the cylinder-piston chamber 61a that joins with spool 1 liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber E between this cylinder-piston chamber 61a and spool 2 ear end faces, the center, the back side of damper piston 61 seal bosses 611 is shaped with the traveller 612 that extends back, piston bushing 62 slides to be nested with traveller 612 guiding of damper piston 61 and joins, and be formed with secondary hydraulic cushion chamber G between the back side of piston bushing 62 and damper piston 61 seal bosses 611, damper piston 61 is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber E and secondary hydraulic cushion chamber G, and the radial hole G1 that is shaped with on the axial bore (E1) that this oil inlet passage is shaped with by the bottom surface of cylinder-piston chamber 61a and the traveller 612 forms.Damper piston assembly 6 and spool 2 cooperate the overflow buffer structure that has consisted of two-stage type, when the pressure pulse of pressure hydraulic fluid port P when reaching first-level buffer pressure or level 2 buffering pressure, make spool 2 can have different keying effects, to guarantee to eliminate better the pressure pulse with absorption pressure hydraulic fluid port P.
Ask for an interview Fig. 5 and in conjunction with Fig. 1 and Fig. 4, adjusting silk braid 5 of the present invention is shaped with axial perforation with the slide opening of two road ring-shaped steps, damper piston assembly 6 is fitted in this slide opening, the piston bushing 62 of damper piston assembly 6 is shaped with location ring surface 621, this location ring surface 621 matches with the second annular table terrace 531 location thrusts of slide opening, the annular front-end face 61b of damper piston 61 seal bosses 611 and the first 521 of annular step surfaces are formed with damping chamber F, and damper piston 61 is shaped with the radially damping hole M that is communicated with one-level hydraulic cushion chamber E and damping chamber F, and the periphery wall 61c of damper piston 61 cylinder-piston chamber 61a and the ring-shaped periphery 61d of seal boss 611 slide with the inwall liquid sealing of the inwall of regulating silk braid 5 first segment slide openings 51 and second section slide opening 52 respectively and match.
Among the embodiment, spiral is fitted with screw plug 7 in the 3rd joint slide opening 53 of adjusting silk braid 5, this screw plug 7 matches with piston bushing 62 positioning and lockings, screw plug 7 is shaped with cylinder cavity 71, the diapire of this cylinder cavity 71 matches with the spacing apical grafting of breech face of damper piston 61 travellers 612, and screw plug 7 is set with the first seal ring O1.Be shaped with internal thread in the 3rd joint slide opening 53 of adjusting silk braid 5, be shaped with the outside thread that is mated on the outer circumferential face of screw plug 7, screw plug 7 screw-tightened clamping piston linings 62 guarantee that piston bushing 62 can not rotate or slide displacement.
See also Fig. 5 and Fig. 2, among the embodiment, adjusting silk braid 5 of the present invention is at the periphery wall that is positioned at first segment slide opening 51 and be positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening 53 and regulate outside thread 5a and locking outside thread 5b, be shaped with the adjusting internal thread 1c suitable with this adjusting outside thread 5a among the assembly cavity 1b of valve body 1, regulate the upper spiral of silk braid (5) locking nut 9 is installed, this locking nut 9 is shaped with and the locking internal thread of locking outside thread 5b spiral and cooperating, and the apical grafting face of locking nut 9 matches with the valve rear end face of valve body 1 12 location apical graftings.The Main Function of locking nut 9 is after adjusting silk braid 5 sets preload pressure, will regulate silk braid 5 lockings, prevents from regulating silk braid 5 rotations and gets loose.
Such as Fig. 1 and shown in Figure 5, be formed with annular space draining passage K between the periphery wall of adjusting silk braid 5 second section slide openings 52 and the inwall of valve body 1 assembly cavity 1b, and the periphery wall rear portion of second section slide opening 52 is shaped with the boss body 522 with sealing circular groove 523, sealing is equipped with in the circular groove 523 for the second seal ring O2 that is sealed and matched with valve body 1 assembly cavity 1b, regulate on the silk braid 5 and be shaped with respectively axial the first draining duct K1 that is connected with annular space draining passage K front port and the second draining duct K2 that is connected with annular space draining passage K rear port, the second draining duct K2 recedes and connects second section slide opening 52.See also Fig. 4, piston bushing 62 is shaped with for the draining connecting passage K3 that is communicated with screw plug 7 cylinder cavitys 71 and the second draining duct K2.
Among the embodiment, as shown in Figure 3, spool 2 comprises valve head body 21 and the valve-rod body 22 that one links to each other, and this spool 2 is shaped with the spool oil duct 2a that is used for being communicated with pressure hydraulic fluid port P and one-level hydraulic cushion chamber E of axial perforation valve head body 21 and valve-rod body 22, be positioned at valve head body 21 places among the spool oil duct 2a and be shaped with the narrow and small damping duct 2b of bore, valve core reset spring 3 is sleeved on the valve-rod body 22 of spool 2, one end of this valve core reset spring 3 and valve head body 21 phase apical graftings, its the other end is pressed with the front-end face top of regulating silk braid 5 through pad 8 and is matched, and the cylinder-piston chamber 61a flip sleeve of damper piston 61 fits over the afterbody of valve-rod body 22.Regulate silk braid 5 by spiral control spool reset spring 3 pressure, reach the purpose of regulation relief valve oil pressure relief.
The outer peripheral surface 211 of spool 2 valve head bodies 21 of the present invention slides with the inner circle wall liquid sealing of valve body 1 valve pocket 1a and matches, this valve head body 21 is divided into the ante-chamber that is positioned at valve head body 21 front portions and the back cavity that is positioned at valve-rod body 21 rear portions with valve pocket, drain tap T is positioned at back cavity, namely valve core reset spring 3 residing chambeies, and the cylinder cavity 71 of screw plug 7 are connected with drain tap T through draining connecting passage K3, the second draining duct K2, annular space draining passage K, the first draining duct K1 and back cavity successively.The Main Function of drain tap T is the hydraulic oil that leaks cylinder cavity 71 and back cavity for giving off, and to guarantee sensitivity and the stability of valve events, improves the reliability of relief valve operation.
Among the embodiment, as shown in Figure 3, oil outlet B is positioned at the ante-chamber that valve head body 21 is cut apart, the front-end face of valve head body 21 is shaped with the taper sealing face 21b that cooperates with valve seat 4 pressure hydraulic fluid port P peripheral sealing apical graftings, and above-mentioned pressure hydraulic fluid port P and the connecting passage between oil outlet B are formed by the disengaging of this taper sealing face 21b and valve seat 4 pressure hydraulic fluid port P peripheries.
Working principle of the present invention as shown in Figure 1, when pressure oil enters pressure hydraulic fluid port P, pressure oil acts on the spool 2 valve head bodies 21, pressure oil enters one-level hydraulic cushion chamber E and secondary hydraulic cushion chamber G through damping duct 2b and the spool oil duct 2a in the spool 2, the pressure oil of one-level hydraulic cushion chamber E enters damping chamber F through the radially damping hole M on the damper piston 61 simultaneously, act on pressure on the spool 2 valve head bodies 21 and overcome active force and one-level hydraulic cushion chamber E pressure under valve core reset spring 3 assembling conditions, spool 2 is moved right, the seal perimeter of the taper sealing face 21b of spool 2 valve head bodies 21 and valve seat 4 pressure hydraulic fluid port P breaks away from the connecting passage between mineralization pressure hydraulic fluid port P and oil outlet B, the pressure oil of pressure hydraulic fluid port P enters oil outlet B, meanwhile the pressure of secondary hydraulic cushion chamber G overcomes damping chamber F, the pressure of one-level hydraulic cushion chamber E and the active force of valve core reset spring 3, promoting damper piston 61 is moved to the left, because the fluid among the damping chamber F is by radially damping hole M outflow, therefore the 61 displacement times of damper piston have been prolonged, play the effect that delays the pressure rise time, compression spool reset spring 3 when damper piston 61 moves to left, valve core reset spring 3 active forces are increased gradually, this moment pressure hydraulic fluid port P pressure along with the increase of valve core reset spring 3 active forces also rising, when damper piston 61 moves on to high order end, the pressure that acts on simultaneously on spool 2 valve-rod bodies 22 ear end faces also progressively raises, act on the spring force on the spool 2 and act on pressure on valve-rod body 22 ear end faces and jointly overcome pressure hydraulic fluid port P and act on pressure on the spool 2, spool 2 is moved to the left, until spool 2 is closed the connecting passage between pressure hydraulic fluid port P and oil outlet B, be cut off between pressure hydraulic fluid port P and the oil outlet B.Enter pressure hydraulic fluid port P from pressure oil, spool 2 is opened, damper piston 61 moves left to last spool 2 and closes, and whole process is very of short duration, and the main purpose that realizes prolongs the pressure rise time exactly, absorb the pressure pulse of P mouth, be equivalent to system pressure is played a buffer function.
Advantage of the present invention is: pressure is adjustable, structure is bolted and gathers, volume is little, lightweight, thread type plug-in mounting structure, easy for installation.
The invention has the beneficial effects as follows: eliminate the system pressure pulse, thereby improve the manoeuvring performance of system's hydraulic pressure component life and main frame.
Claims (10)
1. adjustable-pressure buffer overflow valve, comprise that valve body (1) and slip are fitted in the spool (2) in valve body (1) valve pocket (1a), described spool (2) is set with valve core reset spring (3), it is characterized in that: be shaped with respectively the oil outlet (B) and the drain tap (T) that are communicated with valve pocket (1a) on the described valve body (1), and the accent of this valve pocket (1a) is fitted with the valve seat (4) that cooperates with spool (2) liquid sealing apical grafting, described valve seat (4) is shaped with pressure hydraulic fluid port (P), the coaxial expansion of back segment of described valve pocket (1a) is shaped with assembly cavity (1b), the middle spiral of this assembly cavity (1b) is fitted with length and extends the adjusting silk braid (5) that assembly cavity (1b) is used for adjustable diameter and screw adjusting valve core reset spring (3) buffering preload pressure, and guide sleeve is equipped with to be slidingly matched with spool (2) and consists of the damper piston assembly (6) with two-stage buffering composite structure in this adjusting silk braid (5), described valve body (1) is shaped with the equipped front segment body (11) of plug-in type, described oil outlet (B) and drain tap (T) all are positioned on the front segment body (11) of valve body (1), described spool (2) formula that horizontally slips open or occluding pressure hydraulic fluid port (P) and oil outlet (B) between connecting passage be used for the hydraulic impulse of elimination and absorption pressure hydraulic fluid port.
2. a kind of adjustable-pressure buffer overflow valve according to claim 1, it is characterized in that: described damper piston assembly (6) comprises damper piston (61) and piston bushing (62), described damper piston (61) is shaped with the cylinder-piston chamber (61a) of joining with spool (1) liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber (E) between this cylinder-piston chamber (61a) and spool (2) ear end face, the center, the back side of described damper piston (61) seal boss (611) is shaped with the traveller (612) that extends back, described piston bushing (62) slides to be nested with traveller (612) guiding of damper piston (61) and joins, and be formed with secondary hydraulic cushion chamber (G) between the back side of piston bushing (62) and damper piston (61) seal boss (611), described damper piston (61) is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber (E) and secondary hydraulic cushion chamber (G), and the radial hole (G1) that is shaped with on the axial bore (E1) that described oil inlet passage is shaped with by the bottom surface of cylinder-piston chamber (61a) and the traveller (612) forms.
3. a kind of adjustable-pressure buffer overflow valve according to claim 2, it is characterized in that: described adjusting silk braid (5) is shaped with axial perforation with the slide opening of two road ring-shaped steps, described damper piston assembly (6) is fitted in this slide opening, described piston bushing (62) is shaped with location ring surface (621), this location ring surface (621) matches with the second annular table terrace (531) location thrust of slide opening, be formed with damping chamber (F) between the annular front-end face (61b) of described damper piston (61) seal boss (611) and the first annular step surface (521), and damper piston (61) is shaped with the radially damping hole (M) that is communicated with one-level hydraulic cushion chamber (E) and damping chamber (F), and the periphery wall (61c) in described damper piston (61) cylinder-piston chamber (61a) and the ring-shaped periphery (61d) of seal boss (611) slide with the inwall liquid sealing of the inwall of regulating silk braid (5) first segment slide opening (51) and second section slide opening (52) respectively and match.
4. a kind of adjustable-pressure buffer overflow valve according to claim 3, it is characterized in that: spiral is fitted with screw plug (7) in the 3rd joint slide opening (53) of described adjusting silk braid (5), this screw plug (7) matches with piston bushing (62) positioning and locking, described screw plug (7) is shaped with cylinder cavity (71), the diapire of this cylinder cavity (71) matches with the spacing apical grafting of breech face of damper piston (61) traveller (612), and described screw plug (7) is set with the first seal ring (O1).
5. a kind of adjustable-pressure buffer overflow valve according to claim 4, it is characterized in that: described adjusting silk braid (5) is positioned at the periphery wall of first segment slide opening (51) and is positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening (53) to be regulated outside thread (5a) and locks outside thread (5b), be shaped with the adjusting internal thread (1c) suitable with this adjusting outside thread (5a) in the assembly cavity (1b) of described valve body (1), the upper spiral of described adjusting silk braid (5) is equipped with locking nut (9), this locking nut (9) is shaped with and the locking internal thread of locking outside thread (5b) spiral and cooperating, and the apical grafting face of described locking nut (9) matches with valve rear end face (12) the location apical grafting of valve body (1).
6. a kind of adjustable-pressure buffer overflow valve according to claim 5, it is characterized in that: be formed with annular space draining passage (K) between the inwall of the periphery wall of described adjusting silk braid (5) second section slide opening (52) and valve body (1) assembly cavity (1b), and the periphery wall rear portion of second section slide opening (52) is shaped with the boss body (522) with sealing circular groove (523), be equipped with in the described sealing circular groove (523) for and the second seal ring (O2) of being sealed and matched of valve body (1) assembly cavity (1b), be shaped with respectively axial the first draining duct (K1) that is connected with annular space draining passage (K) front port and the second draining duct (K2) that is connected with annular space draining passage (K) rear port on the described adjusting silk braid (5), described the second draining duct (K2) recedes and connects second section slide opening (52), and described piston bushing (62) is shaped with for the draining connecting passage (K3) that is communicated with screw plug (7) cylinder cavity (71) and the second draining duct (K2).
7. a kind of adjustable-pressure buffer overflow valve according to claim 6, it is characterized in that: described spool (2) comprises valve head body (21) and the valve-rod body (22) that one links to each other, and this spool (2) is shaped with the spool oil duct (2a) that is used for being communicated with pressure hydraulic fluid port (P) and one-level hydraulic cushion chamber (E) of axial perforation valve head body (21) and valve-rod body (22), be positioned at valve head body (21) in the described spool oil duct (2a) and locate to be shaped with the narrow and small damping duct (2b) of bore, described valve core reset spring (3) is sleeved on the valve-rod body (22) of spool (2), one end of this valve core reset spring (3) and valve head body (21) phase apical grafting, its the other end is pressed with the front-end face top of regulating silk braid (5) through pad (8) and is matched, and cylinder-piston chamber (61a) flip sleeve of described damper piston (61) fits over the afterbody of valve-rod body (22).
8. a kind of adjustable-pressure buffer overflow valve according to claim 7, it is characterized in that: the outer peripheral surface (211) of described spool (2) valve head body (21) slides with the inner circle wall liquid sealing of valve body (1) valve pocket (1a) and matches, this valve head body (21) is divided into valve pocket the back cavity that is positioned at the anterior ante-chamber of valve head body (21) and is positioned at valve-rod body (21) rear portion, described drain tap (T) is positioned at back cavity, and the cylinder cavity (71) of described screw plug (7) is successively through draining connecting passage (K3), the second draining duct (K2), annular space draining passage (K), the first draining duct (K1) and back cavity are connected with drain tap (T).
9. a kind of adjustable-pressure buffer overflow valve according to claim 8, it is characterized in that: described oil outlet (B) is positioned at the ante-chamber that valve head body (21) is cut apart, the front-end face of described valve head body (21) is shaped with the taper sealing face (21b) that cooperates with valve seat (4) pressure hydraulic fluid port (P) peripheral sealing apical grafting, and the connecting passage between described pressure hydraulic fluid port (P) and oil outlet (B) is formed by the disengaging of this taper sealing face (21b) and valve seat (4) pressure hydraulic fluid port (P) periphery.
10. a kind of adjustable-pressure buffer overflow valve according to claim 9, it is characterized in that: be shaped with the valve body outside thread (11a) that makes things convenient for spiral to peg graft and be equipped with on the front segment body of described valve body (1) (11), and should be positioned at the valve seals (O3) that the rear square set of valve body outside thread (11a) has been furnished with the plug-in mounting seal action on the front segment body (11).
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| CN2012105776560A CN102996557A (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105776560A CN102996557A (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
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| CN102996557A true CN102996557A (en) | 2013-03-27 |
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| CN2012105776560A Pending CN102996557A (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
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| CN103452923A (en) * | 2013-09-02 | 2013-12-18 | 中石化胜利油建工程有限公司 | Anti-leakage connecting device for large-scale hydraulic machine upper liquid flushing box and installing method of anti-leakage connecting device |
| CN105298527A (en) * | 2015-11-26 | 2016-02-03 | 巨隆集团芜湖兴隆液压有限公司 | Opening and closing mechanism of overflowing safety valve |
| CN105386782A (en) * | 2015-11-26 | 2016-03-09 | 巨隆集团芜湖兴隆液压有限公司 | Overflow safety valve |
| CN105673868A (en) * | 2016-04-14 | 2016-06-15 | 无锡市东液机械制造有限公司 | Valve body structure of oil drainage valve |
| CN105782471A (en) * | 2016-04-14 | 2016-07-20 | 无锡市东液机械制造有限公司 | Oil drain valve structure |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
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| CN103452923A (en) * | 2013-09-02 | 2013-12-18 | 中石化胜利油建工程有限公司 | Anti-leakage connecting device for large-scale hydraulic machine upper liquid flushing box and installing method of anti-leakage connecting device |
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| CN105386782A (en) * | 2015-11-26 | 2016-03-09 | 巨隆集团芜湖兴隆液压有限公司 | Overflow safety valve |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
| CN105909583A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve and hydraulic system |
| CN105909583B (en) * | 2016-03-02 | 2018-01-30 | 杭州力龙液压有限公司 | Buffer relief valve and hydraulic system |
| CN105673868A (en) * | 2016-04-14 | 2016-06-15 | 无锡市东液机械制造有限公司 | Valve body structure of oil drainage valve |
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| CN107762994A (en) * | 2016-08-18 | 2018-03-06 | 梅扎零件有限公司 | Overflow valve and its operation method |
| CN106224313B (en) * | 2016-08-22 | 2018-02-27 | 江苏二马液压元件有限公司 | A kind of pioneer pump overflow valve |
| CN106224313A (en) * | 2016-08-22 | 2016-12-14 | 江苏二马液压元件有限公司 | A kind of pioneer pump overflow valve |
| CN108061069A (en) * | 2017-12-19 | 2018-05-22 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
| CN107939767A (en) * | 2017-12-28 | 2018-04-20 | 邵立坤 | A kind of oil supplementation buffer valve |
| CN107939766A (en) * | 2017-12-28 | 2018-04-20 | 邵立坤 | A kind of oil supplementation buffer valve |
| CN108167256A (en) * | 2017-12-28 | 2018-06-15 | 邵立坤 | A kind of plug-in trimmer valve |
| CN108050119A (en) * | 2017-12-29 | 2018-05-18 | 常熟华威履带有限公司 | A kind of excavator buffer overflow valve |
| CN109026889A (en) * | 2018-10-18 | 2018-12-18 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
| CN109058213A (en) * | 2018-11-05 | 2018-12-21 | 李军 | A kind of valve |
| CN109058213B (en) * | 2018-11-05 | 2019-12-03 | 万静琼 | A kind of valve |
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Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Applicant after: SAIKESI HYDRAULIC TECHNOLOGY CO., LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Applicant before: Ningbo Wide Sky SKS Hydraulic Co., Ltd. |
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Application publication date: 20130327 |