CN104153794B - A kind of core assembly of high-flow safety valve - Google Patents
A kind of core assembly of high-flow safety valve Download PDFInfo
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- CN104153794B CN104153794B CN201410383829.4A CN201410383829A CN104153794B CN 104153794 B CN104153794 B CN 104153794B CN 201410383829 A CN201410383829 A CN 201410383829A CN 104153794 B CN104153794 B CN 104153794B
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Abstract
The invention discloses a kind of core assembly of high-flow safety valve, comprise valve pocket and spool, safety valve also comprises joint and valve casing, valve pocket one end is inserted in joint, the other end inserts in valve casing, valve pocket is provided with the first liquid pass hole and the second liquid pass hole, spool to insert in valve pocket and and be provided with the first hermetically-sealed construction between valve pocket, first hermetically-sealed construction is between the first liquid pass hole and the second liquid pass hole, first hermetically-sealed construction comprises the first sealing ring be enclosed within spool and the second sealing ring be enclosed within the first sealing ring, the path body that spool comprises large footpath body and inserts in the body of large footpath.This core assembly arranges the hermetically-sealed construction be made up of two sealing rings matched between spool with valve pocket, and the first sealing ring is outer circumference surface is provided with the abnormity circle of locating slot, second sealing ring embeds in locating slot and forms extruding to the first sealing ring, thus the first sealing ring is contacted with spool tightr, thus the sealing effectiveness between spool and valve pocket can be improved.
Description
Technical field
The present invention relates to coal mine fully-mechanized mining hydraulic support, specifically, the present invention relates to a kind of core assembly of high-flow safety valve.
Background technology
Along with large-scale enforcement and the development of coal mine fully-mechanized mining hydraulic support; the requirement of working face to hydraulic support is also more and more stricter; so just there is further requirement to the safety valve of protective cradle hydraulic jack; especially to application life of safety valve and reliability having had further requirement; when the pressure from hydraulic support top causes by power; can safety valve when bearing high pressure, and short time fully stable in time off-load directly affects application life and the supporting safety of support.It not only can damage seal, pipeline and Hydraulic Elements, but also can cause vibrations and noise; Sometimes some pressure controlled Hydraulic Elements is made to produce error.
The high-flow safety valve of current use, comprises valve casing, valve pocket, spool, joint, back-moving spring, spring base and voltage regulation screw, and spool and valve pocket form core assembly.Inner at valve casing, it is on the voltage regulation screw that is threaded that back-moving spring one end is against with valve casing end, the other end is against on moveable spring base, joint inserts the valve casing other end and with valve casing for being threaded, joint inside is provided with the cavity for holding valve pocket, spool is positioned at joint and through valve pocket, the end of spool contacts with spring base.This safety valve adopts straight unloading way, adopts single O RunddichtringO sealing, spool sweeping action, and the O RunddichtringO that often rubs of the off-load aperture on spool easily makes sealing ring damaged, and then safety valve can be caused to lose efficacy.
Summary of the invention
The invention provides a kind of core assembly of high-flow safety valve, object improves the sealing effectiveness between spool and valve pocket.
To achieve these goals, the technical scheme that the present invention takes is: a kind of core assembly of high-flow safety valve, comprise valve pocket and spool, safety valve also comprises joint and valve casing, valve pocket one end is inserted in joint, the other end inserts in valve casing, the position that described valve pocket is positioned at described joint is provided with the first liquid pass hole, the position that valve pocket is positioned at described valve casing is provided with the second liquid pass hole, described spool to insert in valve pocket and and be provided with the first hermetically-sealed construction between valve pocket, first hermetically-sealed construction is between the first liquid pass hole and the second liquid pass hole, first hermetically-sealed construction comprises the first sealing ring be enclosed within spool and the second sealing ring be enclosed within the first sealing ring, the outer circumference surface of the first sealing ring is provided with the locating slot of accommodation first sealing ring, the path body that spool comprises large footpath body and inserts in the body of large footpath, the diameter of large footpath body is greater than the diameter of path body.
Described locating slot is along the annular positioning groove that whole circumference extends on the outer circumference surface of described first sealing ring, and the vertical sectional shape of locating slot is arc.
Second hermetically-sealed construction identical with described first hermetically-sealed construction is provided with between described spool with described valve pocket.
The position of the described valve casing of insertion that described first hermetically-sealed construction is positioned at described valve pocket, the position of the described joint of insertion that described second hermetically-sealed construction is positioned at valve pocket, and the second hermetically-sealed construction is between described first liquid pass hole and the end face of valve pocket.
Be provided with in described valve pocket and hold described spool and the inner chamber body extending to other end vertically from an end face, inner chamber body comprises the chamber, large footpath be communicated with described first liquid pass hole and the path chamber be communicated with described second liquid pass hole, and the diameter in chamber, large footpath is greater than the diameter in path chamber.
Described large footpath body inserts in chamber, described large footpath, described path body inserts in described path chamber, large footpath body is provided with the accommodation hole for holding path body and the 3rd liquid pass hole for being communicated with chamber, large footpath and valve core cavity body, and path body is provided with the 4th liquid pass hole for being communicated with path chamber and valve core cavity body.
The inner chamber body of described valve pocket also comprises the central diameter chamber between described chamber, large footpath and described path chamber, and is provided with valve pocket in central diameter chamber to be the swivel nut be threaded, to be provided with the hole allowing the path body of described spool pass in swivel nut.
The path body of described spool is provided with the 5th liquid pass hole for being communicated with described chamber, large footpath and valve core cavity body, and the 5th liquid pass hole is between described 4th liquid pass hole and the end face of described large footpath body.
The inner chamber body of described spool comprise set gradually vertically and aperture reduce gradually hole, large footpath, central diameter hole and diameter holes, described 3rd liquid pass hole is communicated with hole, large footpath, and described 4th liquid pass hole is communicated with diameter holes with described 5th liquid pass hole.
The outer circumference surface being positioned at the position of described valve casing of described valve pocket be provided be communicated with described second liquid pass hole cross liquid bath, cross liquid bath between described first liquid pass hole and the second liquid pass hole.
The core assembly of high-flow safety valve of the present invention, the hermetically-sealed construction be made up of two sealing rings matched is set between spool with valve pocket, and the first sealing ring is outer circumference surface is provided with the abnormity circle of locating slot, second sealing ring embeds in locating slot and forms extruding to the first sealing ring, thus the first sealing ring is contacted with spool tightr, weaken the pressure fluid that overflows in the liquid pass hole of spool to the erosion of the inner peripheral surface of the first sealing ring, thus sealing reliability and the application life of hermetically-sealed construction can be improved, finally can improve the sealing effectiveness between spool and valve pocket.
Accompanying drawing explanation
This manual comprises the following drawings, shown content respectively:
Fig. 1 is the sectional view of the safety valve adopting core assembly of the present invention;
Fig. 2 is the sectional view of valve pocket;
Fig. 3 is the sectional view of spool;
Fig. 4 is the sectional view of joint;
Fig. 5 is the enlarged drawing of A place first hermetically-sealed construction in Fig. 1;
Fig. 6 is the enlarged drawing of B place second hermetically-sealed construction in Fig. 1;
Fig. 7 is the sectional view of the first sealing ring;
Fig. 8 is C place enlarged drawing in Fig. 1;
Fig. 9 is the sectional view of path body;
Figure 10 is the sectional view of large footpath body;
Figure 11 is the sectional view of valve casing and resetting-mechanism;
Figure 12 is the sectional view of voltage regulation screw;
Figure 13 is the sectional view of spring base;
Figure 14 is the sectional view of core assembly of the present invention;
Be labeled as in figure:
1, voltage regulation screw;
2, back-moving spring;
3, spring base; 31, the first boss; 32, guide section; 33, the second boss;
4, joint; 41, working hole; 42, unloading cavity; 43, unloading hole;
5, valve pocket; 51, the first liquid pass hole; 52, the second liquid pass hole; 53, large chamber, footpath; 54, central diameter chamber; 55, path chamber; 56, counter balance pocket; 57, liquid bath is crossed; 58, the first internal channel; 59, the second internal channel; 510, the 3rd internal channel; 511, the 4th internal channel; 512, the first outer channel; 513, the second outer channel; 514, the 3rd outer channel; 515, limited block; 516, the first internal face; 517, the second internal face; 518, the 5th internal channel; 519, the 6th internal channel;
6, spool; 61, the 3rd liquid pass hole; 62, the 4th liquid pass hole; 63, the 5th liquid pass hole; 64, large footpath body; 65, path body; 66, large hole, footpath; 67, central diameter hole; 68, diameter holes; 69, stop surface; 610, accommodation hole;
7, the first sealing ring; 71, locating slot; 8, the second sealing ring;
9, valve casing; 91, step surface; 10, swivel nut; 11, thread segment; 12, the 3rd boss; 13, the 3rd sealing ring; 14, the 4th sealing ring; 15, the 5th sealing ring; 16, the 6th sealing ring; 17, air vent; 18, inner hexagonal hole.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, be described in further detail the specific embodiment of the present invention, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technical scheme, and contribute to its enforcement.
Be illustrated in figure 1 a kind of high-flow safety valve adopting core assembly of the present invention, it comprises valve casing 9, valve pocket 5, spool 6, joint 4, voltage regulation screw 1, back-moving spring 2 and spring base 3, and valve pocket 5 and spool 6 form core assembly.
As shown in Fig. 1 to Figure 14, the valve casing 9 of high-flow safety valve is the cylindrical member of both ends open, inner hollow, voltage regulation screw 1 and joint 4 respectively at the relative two ends of valve casing 9 with valve casing 9 for being threaded, voltage regulation screw 1 screws in valve casing 9 in one end of valve casing 9 to be threaded with valve casing 9, and joint 4 is that the end of entangling valve casing 9 at the other end of valve casing 9 is threaded with valve casing 9.Back-moving spring 2 and spring base 3 form promotion spool 6 and move the resetting-mechanism that safety valve cuts out, back-moving spring 2 and spring base 3 are positioned at the inside of valve casing 9, back-moving spring 2 is clipped between voltage regulation screw 1 and spring base 3, spring base 3 is promoted to slide axially by back-moving spring 2 and spool 6 in valve casing 9, spool 6 promotes spring base 3 and moves towards voltage regulation screw 1 place safety valve can be made to open, and back-moving spring 2 promotes spring base 3 and moves towards valve pocket 5 place safety valve can be made to close.
The joint 4 of high-flow safety valve is for the oil cylinder socket connection with coal mine fully-mechanized mining hydraulic support, joint 4 is provided with a working hole 41, unloading cavity 42 and unloading hole 43, working hole 41 is vertically towards the circular hole that joint 4 inside extends to form from the end face of the inserted terminal of joint 4, unloading cavity 42 is from working hole 41 vertically towards the stepped hole that the end of the other end of joint 4 extends to form in joint 4 inside, unloading cavity 42 is coaxial with working hole 41, unloading hole 43 is circular holes of radially penetrator 4 on the sidewall of joint 4, unloading hole 43 is communicated with unloading cavity 42, unloading hole 43 is also circumferentially uniform multiple on the sidewall of joint 4, the fluid entering safety valve from working hole 41 is outwards flowed out.
Valve pocket 5 and the spool 6 of high-flow safety valve form core assembly, and core assembly is provided with for sealing and hermetically-sealed construction for sealing between valve pocket 5 and spool 6 between valve casing 9 and joint 4.Valve pocket 5 is positioned at joint 4 and valve casing 9, valve pocket 5 is coaxial with valve casing 9 and joint 4, valve pocket 5 one end is inserted in the unloading cavity 42 of joint 4, the other end inserts in the endoporus of valve casing 9, the inner chamber body holding spool 6 is provided with in valve pocket 5, the position that valve pocket 5 is positioned at joint 4 is provided with the first liquid pass hole 51 inner chamber body of valve pocket 5 be communicated with unloading hole 43 with the unloading cavity 42 of joint 4, the position that valve pocket 5 is positioned at valve casing 9 is provided with the second liquid pass hole 52 inner chamber body of valve pocket 5 be communicated with unloading hole 43 with the unloading cavity 42 of joint 4, be spaced a distance between first liquid pass hole 51 and the second liquid pass hole 52, and the first liquid pass hole 51 and the second liquid pass hole 52 are circumferentially uniform multiple on the sidewall of valve pocket 5.Spool 6 is positioned at joint 4 and valve pocket 5, spool 6 is coaxial with valve pocket 5, spool 6 is moveable vertically in valve pocket 5, and be provided with the inner chamber body be communicated with the working hole 41 of joint 4 in spool 6, the sidewall of spool 6 is provided with the liquid pass hole for its inner chamber body being communicated with the inner chamber body of valve pocket 5.
The hermetically-sealed construction of this core assembly is included in the first hermetically-sealed construction arranged between spool 6 and valve pocket 5, this first hermetically-sealed construction is being axially between the first liquid pass hole 51 and the second liquid pass hole 52 along valve pocket 5, first hermetically-sealed construction comprises the first sealing ring 7 be enclosed within spool 6 and the second sealing ring 8 be enclosed within the first sealing ring 7, the inner peripheral surface of the first sealing ring 7 and the outer circumference surface of spool 6 are fitted, second sealing ring 8 applies radial pressure to the first sealing ring 7 and makes the first sealing ring 7 and spool 6 close contact, the outer circumference surface of the first sealing ring 7 is also provided with the locating slot 71 of accommodation first sealing ring 7.Because spool 6 is moveable, the sidewall of spool 6 is provided with liquid pass hole, by arranging the first hermetically-sealed construction be made up of the first sealing ring 7 matched and the second sealing ring 8 between spool 6 with valve pocket 5, first sealing ring 7 is provided with the abnormity circle of locating slot 71 for outer circumference surface, in the inner chamber body of spool 6, enter pressure fluid makes spool 6 promote spring base 3 when moving, pressure fluid enters in the liquid pass hole of spool 6 simultaneously, when spool 6 move liquid pass hole is alignd with the first sealing ring 7 time, pressure fluid can form erosion to the inner peripheral surface of the first sealing ring 7, pressure is produced to the first sealing ring 7, and then the first sealing ring 7 can be made to have the trend radially expanded, and the second sealing ring 8 embeds in locating slot 71 the first sealing ring 7 formation extruding, the first sealing ring 7 is avoided to expand, thus the first sealing ring 7 is contacted with spool 6 tightr, weaken the pressure fluid that overflows in the liquid pass hole of spool 6 to the erosion of the inner peripheral surface of the first sealing ring 7, thus sealing reliability and the application life of hermetically-sealed construction can be improved, finally sealing performance can be improved.
Specifically, the first sealing ring 7 is the abnormity circle adopting nylon material to make, and preferably adopt high-strength nylon, the first sealing ring 7 of nylon material has the advantage that intensity is high, precision is high and abrasion resistance is good, has higher application life and sealing effectiveness.Second sealing ring 8 is the O RunddichtringO adopting quality of rubber materials to make, and has certain elasticity.As shown in figure 5 and figure 7, first sealing ring 7 is annular, its inner peripheral surface is the face of cylinder contacted with spool 6, first sealing ring 7 width is vertically greater than the width of the second sealing ring 8, the external diameter of the first sealing ring 7 is less than the external diameter of the second sealing ring 8, and the external diameter of the first sealing ring 7 is greater than the interior diameter of the second sealing ring 8.Locating slot 71 is along the annular positioning groove that whole circumference extends on the outer circumference surface of the first sealing ring 7, and the vertical sectional shape of locating slot 71 is arc, and its radian is about 120 degree, to adapt to the shape of the second sealing ring 8.The minimum diameter at locating slot 71 place of the first sealing ring 7 is roughly the same with the interior diameter of the second sealing ring 8 or slightly larger than the interior diameter of the second sealing ring 8, can make the second sealing ring 8 and the first sealing ring 7 close contact like this.First sealing ring 7 and the second sealing ring 8 form compound sealing structure, and the second sealing ring 8 applies pressure to the first sealing ring 7 and makes the first sealing ring 7 and spool 6 positiver sealing.
As preferably, the hermetically-sealed construction of this core assembly is also included in the second hermetically-sealed construction arranged between spool 6 and valve pocket 5.As shown in figures 1 to 6, second hermetically-sealed construction is identical with the first hermetically-sealed construction, also be adopt the first above-mentioned sealing ring 7 and the second sealing ring 8 to form, there is the result of use identical with the first hermetically-sealed construction, but according to the first hermetically-sealed construction and the second hermetically-sealed construction position, the size of the size of two sealing rings of the first hermetically-sealed construction and two sealing rings of the second hermetically-sealed construction is had any different.First hermetically-sealed construction is the position of the insertion valve casing 9 being positioned at valve pocket 5, be the position of the insertion joint 4 being positioned at valve pocket 5, and the second hermetically-sealed construction is between the first liquid pass hole 51 and the end face of valve pocket 5 near the second liquid pass hole 52, second hermetically-sealed construction.Because valve pocket 5 is provided with liquid pass hole at Liang Chu vertically, corresponding spool 6 at least also to be arranged vertically the liquid pass hole that two places are corresponding with the first liquid pass hole 51 on valve pocket 5 and the second liquid pass hole 52 respectively, therefore, first hermetically-sealed construction and the second hermetically-sealed construction are set between valve pocket 5 and spool 6, thus the sealing performance of safety valve sealing structure can be improved further, improve sealing effectiveness.
As depicted in figs. 1 and 2, the inner chamber body of the accommodation spool 6 of the valve pocket 5 center setting of high-flow safety valve is the stepped hole axially extending to other end along valve pocket 5 from an end face, inner chamber body comprises the chamber, large footpath 53 be communicated with the first liquid pass hole 51 and the path chamber 55 be communicated with the second liquid pass hole 52, and the diameter in chamber, large footpath 53 is greater than the diameter in path chamber 55.First liquid pass hole 51 is arranged on the sidewall in chamber, encirclement large footpath 53 of valve pocket 5, first liquid pass hole 51 is for running through the circular hole of valve pocket 5 sidewall, and the first liquid pass hole 51 unloading hole 43 position toward the outer side on valve pocket 5 sidewall tilts to extend, the i.e. axis of the first liquid pass hole 51 and the axes intersect of valve pocket 5, angle is between the two less than 90 degree, and the unloading hole 43 of joint 4 is just to the first liquid pass hole 51.Second liquid pass hole 52 is arranged on the sidewall in encirclement path chamber 55 of valve pocket 5, and the second liquid pass hole 52 is for running through the circular hole of valve pocket 5 sidewall, and the axis of the second liquid pass hole 52 and the axis perpendicular of valve pocket 5.
As shown in Figure 2, the inner chamber body of valve pocket 5 also comprises the central diameter chamber 54 between chamber, large footpath 53 and path chamber 55, and the diameter in central diameter chamber 54 is less than the diameter in chamber, large footpath 53, is greater than the diameter in path chamber 55, and chamber, large footpath 53, central diameter chamber 54 and path chamber 55 three are coaxial.In valve pocket 5, central diameter chamber 54 and chamber, large footpath 53 form first internal face 516, form second internal face 517, first internal face 516 and the second internal face 517 is the disk with valve pocket 5 axes normal between path chamber 55 and central diameter chamber 54.In addition, the length in chamber, large footpath 53 is maximum, and the length in path chamber 55 is taken second place, and the length in central diameter chamber 54 is minimum.
As shown in Fig. 3, Fig. 9 and Figure 10, the spool 6 of high-flow safety valve comprises the large footpath body 64 in the chamber, large footpath 53 of inserting valve pocket 5 and the path body 65 in the path chamber 55 of insertion valve pocket 5, one end of path body 65 is inserted in path chamber 55, and the other end inserts in large footpath body 64.The external diameter of large footpath body 64 is equal with the diameter in chamber, large footpath 53, the external diameter of path body 65 is equal with the diameter in path chamber 55, the diameter of large footpath body 64 is greater than the diameter of path body 65, first sealing ring 7 of the first hermetically-sealed construction is enclosed within path body 65, and the first sealing ring 7 of the second hermetically-sealed construction is enclosed within large footpath body 64.Large footpath body 64 and path body 65 are coaxial, large footpath body 64 and path body 65 are split-type structural, path body 65 inserts in large footpath body 64 and forms spool 6, external diameter due to large footpath body 64 is greater than the external diameter of path body 65, thus large footpath body 64 can be used as stop surface 69 towards the end face of the first internal face 516, this stop surface 69 is the disk parallel and adjacent with the first internal face 516.In the chamber, large footpath 53 of valve pocket 5, the space between the first internal face 516 and stop surface 69 is counter balance pocket 56.
As shown in Figure 3, the large footpath body 64 of spool 6 is provided with the 3rd liquid pass hole 61 for being communicated with chamber, large footpath 53 and spool 6 inner chamber body, path body 65 is provided with the 4th liquid pass hole 62 for being communicated with path chamber 55 and spool 6 inner chamber body, path body 65 is also provided with the 5th liquid pass hole 63 for being communicated with chamber, large footpath 53 and spool 6 inner chamber body, and the 5th liquid pass hole 63 is between the 4th liquid pass hole 62 and the stop surface 69 of large footpath body 64,5th liquid pass hole 63 is also comparatively near apart from stop surface 69, and namely counter balance pocket 56 can be communicated with spool 6 inner chamber body by the 5th liquid pass hole 63.
As shown in Figure 3, the inner chamber body of spool 6 comprise set gradually vertically and aperture reduce gradually hole, large footpath 66, central diameter hole 67 and diameter holes 68, hole, large footpath 66, central diameter hole 67 and diameter holes 68 three are coaxial, and it is coaxial with spool 6, the working hole 41 of the positive butt joint 4 in hole, large footpath 66, is communicated with working hole 41.Hole, large footpath 66 and central diameter hole 67 are positioned at the large footpath body 64 of spool 6, and diameter holes 68 is the path bodies 65 being positioned at spool 6, and diameter holes 68 axially extends a segment distance towards the inside of path body 65 from the end face of path body 65 along spool 6, but do not run through path body 65.The aperture of hole, large footpath 66, central diameter hole 67 and diameter holes 68 reduces gradually, thus can have the effect of damping to the pressure fluid flowed in spool 6, slows down the flow velocity of pressure fluid, reduces hydraulic shock.3rd liquid pass hole 61 is communicated with hole, large footpath 66, and the 3rd liquid pass hole 61 is for running through the circular hole of spool 6 sidewall, and the axis of the 3rd liquid pass hole 61 and the axis perpendicular of spool 6.4th liquid pass hole 62 is communicated with diameter holes 68 with the 5th liquid pass hole 63, and the 4th liquid pass hole 62 and the 5th liquid pass hole 63 are for running through the circular hole of spool 6 sidewall, and the axis of the 4th liquid pass hole 62 and the 5th liquid pass hole 63 and the axis perpendicular of spool 6.
3rd liquid pass hole 61, the 4th liquid pass hole 62 and the 5th liquid pass hole 63 are circumferentially uniform multiple on the sidewall of spool 6,5th liquid pass hole 63 is between the 3rd liquid pass hole 61 and the 4th liquid pass hole 62, is spaced a distance respectively and between the 3rd liquid pass hole 61 and the 4th liquid pass hole 62.The length of spool 6 is greater than the length of valve pocket 5, and when arranged at safety valve is in closed condition as shown in Figure 1, one end of spool 6 is stretched out in the unloading cavity of valve pocket 5 outer insertion joint 4, and remainder inserts in the inner chamber body of valve pocket 5.The length of the inner chamber body of spool 6 is less than the length of the inner chamber body of valve pocket 5, at safety valve axially, distance between the axis of the 3rd liquid pass hole 61 and the axis of the 4th liquid pass hole 62 is greater than the distance between the axis of the first liquid pass hole and the axis of the second liquid pass hole, and counter balance pocket 56 is communicated with diameter holes 68 in spool 6 by the 5th liquid pass hole 63.
The aperture of the 3rd liquid pass hole 61 on spool 6 is greater than the aperture of the 4th liquid pass hole 62 and the 5th liquid pass hole 63, the aperture of the 5th liquid pass hole 63 is slightly larger than the aperture of the 4th liquid pass hole 62, the aperture of the 3rd liquid pass hole 61, the 4th liquid pass hole 62 and the 5th liquid pass hole 63 is all less, and be all less than the aperture of diameter holes 68, for having the damping hole of damping to the pressure fluid flow through.5th liquid pass hole 63 is for stuffing pressure liquid in counter balance pocket 56, the pressure fluid flowed into from the working hole 41 of joint 4 enter in the inner chamber body of spool 6 promote spool 6 move time, some pressure fluid can first flow in counter balance pocket 56 through the 5th liquid pass hole 63, pressure fluid in counter balance pocket 56 can produce resistance to spool 6, alleviate the hydraulic shock that spool 6 is opened instantaneously to a great extent, and reduce the axial compression of spool 6 pairs of spring bases 3, the unlatching of safety valve is stablized in time, well protect seal and the miscellaneous part of safety valve, considerably increase the application life of safety valve.
As shown in Figure 9 and Figure 10, large footpath body 64 and path body 65 are cylindrical, the accommodation hole 610 for holding path body 65 is provided with in large footpath body 64, this accommodation hole 610 axially extends to central diameter hole 67 place towards body 64 inside, large footpath along large footpath body 64 from stop surface 69 place, and be communicated with central diameter hole 67 and be coaxial.The diameter of accommodation hole 610 and the external diameter equal and opposite in direction of path body 65, the diameter in central diameter hole 67 is slightly larger than the diameter of diameter holes 68, and be less than the diameter of accommodation hole 610, thus the structure of path body 65 being carried out to axial limiting can be formed, path body 65 can carry out axial slip along accommodation hole 610.Accommodation hole 610 has certain length, and its length is roughly the half of large footpath body 64 length, guarantees that path body 65 inserts comparatively dark, avoids safety valve opening process small diameter body 65 to be separated from large footpath body 64 because of mobile.
The spool 6 of said structure adopts the split-type structural be made up of large footpath body 64 and path body 65, owing to being provided with all porous on large footpath body 64 and path body 65, large footpath body 64 and path body 65 can be made separately when processing spool 6, be convenient to processing on the one hand, improve working (machining) efficiency, the machining accuracy of large footpath body 64 and path body 65 can be improved on the other hand, guarantee between spool 6 with valve pocket 5 coordinate reliable.
As shown in Figure 1, also be provided with in the central diameter chamber 54 of valve pocket 5 and the swivel nut 10 of valve pocket 5 for being threaded, the external surface of swivel nut 10 is provided with external screw thread, the inwall in the central diameter chamber 54 of valve pocket 5 is corresponding is provided with internal thread, swivel nut 10 is fixed in valve pocket 5, first hermetically-sealed construction is adjacent with swivel nut 10 position, swivel nut 10 1 aspect can be carried out spacing to the first hermetically-sealed construction in the axial direction, the installation facilitating the first hermetically-sealed construction on the other hand, by swivel nut 10 is screwed in central diameter chamber 54, two sealing rings that swivel nut 10 can promote the first hermetically-sealed construction are clamp-oned in the first internal channel 58 in valve pocket 5, thus can be quick, first hermetically-sealed construction is installed easily.The center of swivel nut 10 is also provided with the through hole allowing the path body 65 of spool 6 pass, the aperture of this through hole and the external diameter equal and opposite in direction of path body 65.
As depicted in figs. 1 and 2, the external diameter being positioned at the position of valve casing 9 of valve pocket 5 is less than the external diameter being positioned at the position of joint 4 of valve pocket 5, first outer channel 512 for arranging sealing ring and second outer channel 513 is respectively equipped with at the two ends of valve pocket 5, the outer circumference surface being positioned at the position of joint 4 of valve pocket 5 is provided with the 3rd outer channel 514, 3rd outer channel 514 is annular groove circumferentially on the outer circumference surface of valve pocket 5, 3rd outer channel 514 is also communicated with the first liquid pass hole 51, 3rd outer channel 514 makes the first liquid pass hole 51 be communicated with unloading hole 43 with unloading cavity 42.Valve pocket 5 arranges the 3rd outer channel 514, thus the limited block 515 that formation one is annular on valve pocket 5, this limited block 515 is adjacent with valve casing 9, and at valve pocket 5 axially, be spaced a distance between the end face of limited block 515 and valve casing 9, in the radial direction of valve pocket 5, be spaced a distance between the outer circumference surface of limited block 515 and the inner peripheral surface of joint 4.The outer circumference surface being positioned at the position of valve casing 9 of valve pocket 5 is also provided with the liquid bath 57 be excessively communicated with the second liquid pass hole 52, crossing liquid bath 57 is along the annular groove that whole circumference extends on the outer circumference surface of valve pocket 5, and mistake liquid bath 57 also axially extends to limited block 515 place along valve pocket 5 from the second liquid pass hole 52 place.Valve pocket 5 was arranged liquid bath 57, thus make to form the gap allowing pressure fluid pass through between the inner peripheral surface of valve pocket 5 and valve casing 9 end, the pressure fluid flowed out from the second liquid pass hole 52 can enter liquid bath 57, and the pressure fluid entered in liquid bath 57 can flow to unloading hole 43 through the gap between limited block 515 and the inner peripheral surface of valve casing 9 and joint 4.By arranging liquid bath 57, discharge in the unloading cavity 42 of the pressure fluid guide sub 4 that the second liquid pass hole 52 is flowed out and unloading hole 43, without the need to position corresponding with the second liquid pass hole 52 on joint 4 or valve casing 9, a unloading hole be communicated with the second liquid pass hole 52 is set again, thus the structure of valve casing 9 and joint 4 can be simplified, save material, convenient processing, reduces costs.
In high-flow safety valve opening process, after the 4th liquid pass hole 62 on spool 6 crosses the first hermetically-sealed construction, four liquid pass hole 62 of pressure fluid on spool 6 of small part, the second liquid pass hole 52 on valve pocket 5, cross liquid bath 57 and unloading cavity 42 flows to unloading hole 43, after the 3rd liquid pass hole 61 on spool 6 crosses the second hermetically-sealed construction, most pressure fluid is through the 3rd liquid pass hole 61, the first liquid pass hole 51 on valve pocket 5 and unloading cavity 42 flow to unloading hole 43, the pressure fluid now entered in spool 6 is divided into two-way flows to liquid pass hole on valve pocket 5 and joint 4 respectively unloading cavity 42 through the 3rd liquid pass hole 61 and the 4th liquid pass hole 62, finally discharge from unloading hole 43.Pressure fluid is divided into two-way and discharges, and can reduce hydraulic shock on the one hand, can improve unloading rate on the other hand.
As shown in Fig. 1 and Figure 11, a limited step is provided with in the endoporus of valve casing 9, thus form one for step surface 91 spacing to one end of valve pocket 5 in the axial direction, the other end of valve pocket 5 is undertaken spacing by joint 4, valve pocket 5 inserts in valve casing 9, is not directly connected, and entangled by joint 4 with valve casing 9, by Screw joint 4, valve pocket 5 is finally made to fix.
The hermetically-sealed construction of this core assembly also comprises the 3rd sealing ring 13 be enclosed within the path body 65 of spool 6, the 4th sealing ring 14 be enclosed within the large footpath body 64 of spool 6, be enclosed within the 5th sealing ring 15 on valve pocket 5 and the 6th sealing ring the 16, three sealing ring 13, the 4th sealing ring 14, the 5th sealing ring 15 and the 6th sealing ring 16 are the O RunddichtringO adopting quality of rubber materials to make.3rd sealing ring 13 and the 4th sealing ring 14 are for the sealing between valve pocket 5 and spool 6, and the 4th sealing ring 14 and the 5th sealing ring 15 are for valve pocket 5 and the sealing between valve casing 9 and joint 4.As shown in Fig. 2 and Figure 14, for the ease of arranging each sealing ring of hermetically-sealed construction, corresponding be provided with in valve pocket 5 inside be respectively used to accommodation first hermetically-sealed construction the first internal channel 58, for hold the second hermetically-sealed construction the second internal channel 59, for holding the 3rd internal channel 510 of the 3rd sealing ring 13 and the 4th internal channel 511 for holding the 4th sealing ring 14, the first outer channel 512 that valve pocket 5 outer circumference surface is arranged is for holding the 6th sealing ring 16 for holding the 5th sealing ring 15, second outer channel 513.
Specifically, first internal channel 58 and the 3rd internal channel 510 are annular groove circumferentially on the inner peripheral surface at path chamber 55 place of valve pocket 5, first internal channel 58 and the 3rd internal channel 510 are also positioned at the both sides of the second liquid pass hole 52, and the first internal channel 58 also extends to the second internal face 517 place in central diameter chamber 54 vertically, so that the installation of two of the first hermetically-sealed construction sealing rings.
Second internal channel 59 and the 4th internal channel 511 are annular groove circumferentially on the inner peripheral surface at chamber 53, the large footpath place of valve pocket 5, second internal channel 59 and the 4th internal channel 511 are also positioned at the both sides of the first liquid pass hole 51, and the second internal channel 59 also extends to the end of valve pocket 5 vertically, so that the installation of two of the second hermetically-sealed construction sealing rings.
First outer channel 512 and the second outer channel 513 are annular groove circumferentially on the outer circumference surface of valve pocket 5, first outer channel 512 is positioned at valve casing 9, first outer channel 512 between the end face of end in the insertion valve casing 9 of the second liquid pass hole 52 and valve pocket 5, second outer channel 513 is positioned at joint 4, second outer channel 513 is adjacent with the 3rd outer channel 514 position, and the second outer channel 513 also extends to the end of valve pocket 5 vertically.
3rd sealing ring 13 and the 4th sealing ring 14 are set in the 3rd internal channel 510 and the 4th internal channel 511, thus the sealing performance that can improve between valve pocket 5 and spool 6,5th sealing ring 15 and the 6th sealing ring 16 are set in the first outer channel 512 and the second outer channel 513, thus valve pocket 5 and the sealing performance between valve casing 9 and joint 4 can be improved.
On the inner peripheral surface at chamber 53, the large footpath place of valve pocket 5, corresponding first liquid pass hole 51 place is provided with the 5th internal channel 518, on the inner peripheral surface at path chamber 55 place of valve pocket 5, corresponding second liquid pass hole 52 place is provided with the 6th internal channel 519,5th internal channel 518 and the 6th internal channel 519 are the groove of annular, 5th internal channel 518 is communicated with the first liquid pass hole 51, and the 6th internal channel 519 is communicated with the second liquid pass hole 52.The width of the 5th internal channel 518 is greater than the diameter of the first liquid pass hole 51, and the width of the 6th internal channel 519 is greater than the diameter of the second liquid pass hole 52.
This core assembly matches with the resetting-mechanism of high-flow safety valve, as illustrated in figures 11 and 13, the spring base 3 of this resetting-mechanism is made up of guide section 32, first boss 31 and the second boss 33, guide section 32 is circular block shape structure, and the first boss 31 and the second boss 33 are connected to form one in the side of guide section 32 and guide section 32 spring base 3 of structure respectively.First boss 31 and the second boss 33 coaxial with guide section 32, first boss 31 is cylindrical, second boss 33 is spherical, second boss 33 is the end contacts with spool 6 in the path chamber 55 for inserting valve pocket 5, to promote the active force that spool 6 moved or bore spool 6 applying, the end face that the path body 65 of spool 6 contacts with the second boss 33 is the plane with its axes normal.Back-moving spring 2 is helical spring, and the first boss 31 positions one end of back-moving spring 2 for inserting in back-moving spring 2.The diameter of guide section 32 is greater than the diameter of the first boss 31, and the outer circumference surface of guide section 32 is arcwall face, and guidance quality is good.The external diameter of guide section 32 is slightly less than the interior diameter of valve casing 9, leaves gap between guide section 32 and valve casing 9.
As is illustrated by figs. 11 and 12, voltage regulation screw 1 comprises the thread segment 11 be connected with valve casing 9 and the 3rd boss 12 protruded on thread segment 11, thread segment 11 establishes threaded cylindrical structural on outer circumference surface, correspondingly on the end inner peripheral surface of valve casing 9, be provided with internal thread, 3rd boss 12 is identical with the first boss 31 diameter cylindrical, and the 3rd boss 12 is coaxial with thread segment 11.3rd boss 12 positions the other end of back-moving spring 2 for inserting in back-moving spring 2, by arranging the first boss 31 and the 3rd boss 12, the axial location of back-moving spring 2 can be made more reliable, back-moving spring 2 can not bend inclination, can not occur displacement diametrically in valve casing 9, improve the steering capability to back-moving spring 2, guarantee that the axial force of back-moving spring 2 is more excellent.
As shown in figure 11, the center of the 3rd boss 12 on voltage regulation screw 1 is provided with an air vent 17, the center of thread segment 11 is provided with an inner hexagonal hole 18 be communicated with air vent 17, air vent 17 is the circular hole of the end face extending to the 3rd boss 12 vertically, the aperture of air vent 17 is less, inner hexagonal hole 18 extends to the end face of thread segment 11 vertically, and inner hexagonal hole 18 is for inserting spanner, to turn voltage regulation screw 1.Owing to being sealed by the 5th sealing ring 15 between the core assembly of spring base 3 side and valve casing 9, air vent 17 is communicated with inner hexagonal hole 18, thus the space at resetting-mechanism place in valve casing 9 endoporus can be in communication with the outside, make space, resetting-mechanism place be unsealed, guarantee that spring base 3 can move around.
The nominal pressure of the high-flow safety valve of said structure is 50MPa, and nominal flow rate is 1000L/min, and pressure fluid is emulsion.
Below by reference to the accompanying drawings to invention has been exemplary description.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; Or without improvement, above-mentioned design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention.
Claims (9)
1. the core assembly of a high-flow safety valve, comprise valve pocket and spool, safety valve also comprises joint and valve casing, valve pocket one end is inserted in joint, the other end inserts in valve casing, it is characterized in that: the position that described valve pocket is positioned at described joint is provided with the first liquid pass hole, the position that valve pocket is positioned at described valve casing is provided with the second liquid pass hole, described spool to insert in valve pocket and and be provided with the first hermetically-sealed construction between valve pocket, first hermetically-sealed construction is between the first liquid pass hole and the second liquid pass hole, first hermetically-sealed construction comprises the first sealing ring be enclosed within spool and the second sealing ring be enclosed within the first sealing ring, the outer circumference surface of the first sealing ring is provided with the locating slot of accommodation second sealing ring, the path body that spool comprises large footpath body and inserts in the body of large footpath, the diameter of large footpath body is greater than the diameter of path body, be provided with in described valve pocket and hold described spool and the inner chamber body extending to other end vertically from an end face, inner chamber body comprises the chamber, large footpath be communicated with described first liquid pass hole and the path chamber be communicated with described second liquid pass hole, and the diameter in chamber, large footpath is greater than the diameter in path chamber.
2. the core assembly of high-flow safety valve according to claim 1, is characterized in that: described locating slot is along the annular positioning groove that whole circumference extends on the outer circumference surface of described first sealing ring, and the vertical sectional shape of locating slot is arc.
3. the core assembly of high-flow safety valve according to claim 1 and 2, is characterized in that: be provided with second hermetically-sealed construction identical with described first hermetically-sealed construction between described spool with described valve pocket.
4. the core assembly of safety valve according to claim 3, it is characterized in that: the position of the described valve casing of insertion that described first hermetically-sealed construction is positioned at described valve pocket, the position of the described joint of insertion that described second hermetically-sealed construction is positioned at valve pocket, and the second hermetically-sealed construction is between described first liquid pass hole and the end face of valve pocket.
5. the core assembly of high-flow safety valve according to claim 4, it is characterized in that: described large footpath body inserts in chamber, described large footpath, described path body inserts in described path chamber, large footpath body is provided with the accommodation hole for holding path body and the 3rd liquid pass hole for being communicated with chamber, large footpath and valve core cavity body, and path body is provided with the 4th liquid pass hole for being communicated with path chamber and valve core cavity body.
6. the core assembly of high-flow safety valve according to claim 5, it is characterized in that: the inner chamber body of described valve pocket also comprises the central diameter chamber between described chamber, large footpath and described path chamber, and be provided with valve pocket in central diameter chamber to be the swivel nut be threaded, in swivel nut, to be provided with the hole allowing the path body of described spool pass.
7. the core assembly of high-flow safety valve according to claim 6, it is characterized in that: the path body of described spool is provided with the 5th liquid pass hole for being communicated with described chamber, large footpath and valve core cavity body, and the 5th liquid pass hole is between described 4th liquid pass hole and the end face of described large footpath body.
8. the core assembly of high-flow safety valve according to claim 7, it is characterized in that: the inner chamber body of described spool comprise set gradually vertically and aperture reduce gradually hole, large footpath, central diameter hole and diameter holes, described 3rd liquid pass hole is communicated with hole, large footpath, and described 4th liquid pass hole is communicated with diameter holes with described 5th liquid pass hole.
9. the core assembly of high-flow safety valve according to claim 8, it is characterized in that: the outer circumference surface being positioned at the position of described valve casing of described valve pocket be provided be communicated with described second liquid pass hole cross liquid bath, cross liquid bath between described first liquid pass hole and the second liquid pass hole.
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| CN201410383829.4A CN104153794B (en) | 2014-08-06 | 2014-08-06 | A kind of core assembly of high-flow safety valve |
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| CN201410383829.4A CN104153794B (en) | 2014-08-06 | 2014-08-06 | A kind of core assembly of high-flow safety valve |
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| CN104153794B true CN104153794B (en) | 2016-02-17 |
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| CN109538261A (en) * | 2018-12-29 | 2019-03-29 | 凡尔机械集团有限公司 | A kind of two-stage relieving flowing volume safety valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0608491B1 (en) * | 1993-01-27 | 1997-05-21 | Richard Voss Grubenausbau Gmbh | Pressure relief valve for large rate of flow |
| CN201173127Y (en) * | 2008-04-03 | 2008-12-31 | 郑州恒达液压工程中心 | Large flow safety valve for hydraulic support hydraulic-oil cylinder |
| CN103506814A (en) * | 2013-09-27 | 2014-01-15 | 巨隆集团芜湖兴隆液压有限公司 | Manufacturing method for valve element component |
| CN203531930U (en) * | 2013-11-09 | 2014-04-09 | 巨隆集团芜湖兴隆液压有限公司 | Large flow safety valve |
| CN203978461U (en) * | 2014-08-06 | 2014-12-03 | 巨隆集团芜湖兴隆液压有限公司 | A kind of core assembly of high-flow safety valve |
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2014
- 2014-08-06 CN CN201410383829.4A patent/CN104153794B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0608491B1 (en) * | 1993-01-27 | 1997-05-21 | Richard Voss Grubenausbau Gmbh | Pressure relief valve for large rate of flow |
| CN201173127Y (en) * | 2008-04-03 | 2008-12-31 | 郑州恒达液压工程中心 | Large flow safety valve for hydraulic support hydraulic-oil cylinder |
| CN103506814A (en) * | 2013-09-27 | 2014-01-15 | 巨隆集团芜湖兴隆液压有限公司 | Manufacturing method for valve element component |
| CN203531930U (en) * | 2013-11-09 | 2014-04-09 | 巨隆集团芜湖兴隆液压有限公司 | Large flow safety valve |
| CN203978461U (en) * | 2014-08-06 | 2014-12-03 | 巨隆集团芜湖兴隆液压有限公司 | A kind of core assembly of high-flow safety valve |
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