CN104141501A - Valve element assembly of safety valve - Google Patents
Valve element assembly of safety valve Download PDFInfo
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- CN104141501A CN104141501A CN201410383925.9A CN201410383925A CN104141501A CN 104141501 A CN104141501 A CN 104141501A CN 201410383925 A CN201410383925 A CN 201410383925A CN 104141501 A CN104141501 A CN 104141501A
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- pass hole
- sealing ring
- valve pocket
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Abstract
The invention discloses a valve element assembly of a safety valve. The valve element assembly of the safety valve comprises a valve bush and a valve element. The safety valve further comprises a connector and a valve casing, wherein one end of the valve bush is inserted into the connector, the other end of the valve bush is inserted into the valve casing, the valve bush is provided with a first fluid passing hole and a second fluid passing hole, the valve element is inserted into the valve bush, a first sealing structure is arranged between the valve element and the valve bush and is located between the first fluid passing hole and the second fluid passing hole, the first sealing structure comprises a first sealing ring and a second sealing ring, the valve element is sleeved with the first sealing ring, the first sealing ring is sleeved with the second sealing ring, and a positioning groove used for containing the first sealing ring is formed in the outer circumferential surface of the first sealing ring. According to the valve element assembly of the safety valve, the sealing structure composed of the two matched sealing rings is arranged between the valve element and the valve bush, the first sealing ring is a special-shaped ring with the positioning groove formed in the outer circumferential surface, the second sealing ring is embedded into the positioning groove to squeeze the first sealing ring, in this way, the first sealing ring can make closer contact with the valve element, and therefore the sealing effect between the valve element and the valve bush 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 safety valve.
Background technology
Large-scale enforcement and development along with coal mine fully-mechanized mining hydraulic support; working face is also more and more stricter to the requirement of hydraulic support; so just the safety valve of protective cradle hydraulic jack has been had to further requirement; especially to the application life of safety valve and reliability having had further requirement; when the pressure from hydraulic support top causes by power; can safety valve in the situation that bearing high pressure, and the short time, in time abundant stable off-load directly affected 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 make some pressure controlled Hydraulic Elements produce error.
The safety valve using at present, 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 being threaded that back-moving spring one end is against with valve casing end, the other end is against movably on spring base, joint insert the valve casing other end and with valve casing for being threaded, joint inside is provided with for holding the cavity of valve pocket, spool is positioned at joint and through valve pocket, the end of spool contacts with spring base.This safety valve is to adopt straight unloading way, adopts single O RunddichtringO sealing, and spool moves back and forth, and the O RunddichtringO that often rubs of the off-load aperture on spool easily makes sealing ring damaged, and then can cause safety valve to lose efficacy.
Summary of the invention
The invention provides a kind of core assembly of safety valve, object is the sealing effectiveness improving between spool and valve pocket.
To achieve these goals, the technical scheme that the present invention takes is: a kind of core assembly of safety valve, comprise valve pocket and spool, safety valve also comprises joint and valve casing, insert in joint valve pocket one end, 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 insert in valve pocket and and valve pocket between be provided with the first hermetically-sealed construction, the first hermetically-sealed construction is between the first liquid pass hole and the second liquid pass hole, the first hermetically-sealed construction comprises the first sealing ring being enclosed within on spool and is enclosed within the second sealing ring on the first sealing ring, the outer circumference surface of the first sealing ring is provided with the locating slot that holds the first sealing ring.
Described locating slot be on the outer circumference surface of described the first sealing ring along the annular positioning groove of whole circumferential extension, and the vertical sectional shape of locating slot is arc.
Between described spool and described valve pocket, be provided with second hermetically-sealed construction identical with described the first hermetically-sealed construction.
Described the first hermetically-sealed construction is positioned at the position of the described valve casing of insertion of described valve pocket, and described the second hermetically-sealed construction is positioned at the position of the described joint of insertion of valve pocket, and the second hermetically-sealed construction is between described the first liquid pass hole and the end face of valve pocket.
In described valve pocket, be provided with the inner chamber body of holding described spool and extending to vertically other end from an end face, inner chamber body comprises the chamber, large footpath being communicated with described the first liquid pass hole and the path chamber being communicated with described the second liquid pass hole, and the diameter in chamber, large footpath is greater than the diameter in path chamber.
Described spool comprises the large footpath body inserting in chamber, described large footpath and inserts the path body in described path chamber, large footpath body is provided with for being communicated with the 3rd liquid pass hole of chamber, large footpath and valve core cavity body, and path body is provided with for being communicated with the 4th liquid pass hole of 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 in central diameter chamber, to be provided with valve pocket be the swivel nut being threaded, and is provided with the hole that allows the path body of described spool pass in swivel nut.
The path body of described spool is provided with for being communicated with the 5th liquid pass hole of described chamber, large footpath and valve core cavity body, and the 5th liquid pass hole is between described the 4th liquid pass hole and the end face of described large footpath body.
The inner chamber body of described spool comprises and setting gradually vertically and hole, large footpath, central diameter hole and diameter holes that aperture reduces gradually, and described the 3rd liquid pass hole is communicated with hole, large footpath, and described the 4th liquid pass hole and described the 5th liquid pass hole are communicated with diameter holes.
The outer circumference surface at the position that is positioned at described valve casing of described valve pocket is provided with the liquid bath of crossing being communicated with described the second liquid pass hole, crosses liquid bath and between described the first liquid pass hole and the second liquid pass hole.
The core assembly of safety valve of the present invention, between spool and valve pocket, arrange by two hermetically-sealed constructions that sealing ring forms that match, and the first sealing ring is the abnormity circle that outer circumference surface is provided with locating slot, the second sealing ring embeds in locating slot the first sealing ring is formed to extruding, thereby what make that the first sealing ring contacts with spool is tightr, weaken the erosion to the inner peripheral surface of the first sealing ring of pressure fluid from overflowing in the liquid pass hole of spool, thereby can improve sealing reliability and the application life of hermetically-sealed construction, finally can improve the sealing effectiveness between spool and valve pocket.
Accompanying drawing explanation
This manual comprises the following drawings, shown in content respectively:
Fig. 1 is the sectional view that adopts the safety valve of 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 the first hermetically-sealed construction in Fig. 1;
Fig. 6 is the enlarged drawing of B place the 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 valve casing and resetting-mechanism;
Figure 10 is the sectional view of voltage regulation screw;
Figure 11 is the sectional view of spring base;
Figure 12 is the sectional view of core assembly of the present invention;
In figure, be labeled as:
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, chamber, large footpath; 54, central diameter chamber; 55, path chamber; 56, counter balance pocket; 57, cross liquid bath; 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, hole, large footpath; 67, central diameter hole; 68, diameter holes; 69, stop surface;
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.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail, and object is to help those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technical scheme, and contributes to its enforcement.
Be illustrated in figure 1 a kind of safety valve that adopts core assembly of the present invention, comprise valve casing 9, valve pocket 5, spool 6, joint 4, voltage regulation screw 1, back-moving spring 2 and spring base 3, valve pocket 5 and spool 6 form core assembly.
As shown in Figures 1 to 12, the valve casing 9 of 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 is to be threaded with valve casing 9 in one end of valve casing 9 screws in valve casing 9, and joint 4 is that the end that the other end at valve casing 9 entangles 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 to be clipped between voltage regulation screw 1 and spring base 3, spring base 3 is promoted to slide vertically by back-moving spring 2 and spool 6 in valve casing 9, spool 6 promotion spring bases 3 move towards voltage regulation screw 1 place and can make safety valve open, and back-moving spring 2 promotes spring bases 3 and moves and can make safety valve close towards valve pocket 5 places.
The joint 4 of 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 circular holes that the end face from the inserted terminal of joint 4 extends to form towards joint 4 inside vertically, unloading cavity 42 is the stepped holes that extend to form towards the end of the other end of joint 4 vertically from working hole 41 in joint 4 inside, unloading cavity 42 is coaxial with working hole 41, unloading hole 43 is circular holes of penetrator 4 radially on the sidewall of joint 4, unloading hole 43 is communicated with unloading cavity 42, unloading hole 43 and on the sidewall of joint 4 along circumferentially uniform a plurality of, the fluid that enters safety valve from working hole 41 is outwards flowed out.
On this core assembly and be provided with for sealing between valve casing 9 and joint 4 and the hermetically-sealed construction for sealing between valve pocket 5 and spool 6.Valve pocket 5 is positioned at joint 4 and valve casing 9, valve pocket 5 is coaxial with valve casing 9 and joint 4, insert in the unloading cavity 42 of joint 4 valve pocket 5 one end, the other end inserts in the endoporus of valve casing 9, in valve pocket 5, be provided with the inner chamber body of holding spool 6, the position that valve pocket 5 is positioned at joint 4 is provided with the first liquid pass hole 51 that the inner chamber body of valve pocket 5 is communicated with unloading cavity 42 and the unloading hole 43 of joint 4, the position that valve pocket 5 is positioned at valve casing 9 is provided with the second liquid pass hole 52 that the inner chamber body of valve pocket 5 is communicated with unloading cavity 42 and the unloading hole 43 of joint 4, the certain distance in interval between the 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 edge on the sidewall of valve pocket 5 is circumferentially uniform a plurality of.Spool 6 is to be positioned at joint 4 and valve pocket 5, spool 6 is coaxial with valve pocket 5, spool 6 vertically for movably, is provided with the inner chamber body being communicated with the working hole 41 of joint 4 in valve pocket 5 in spool 6, the sidewall of spool 6 is provided with the liquid pass hole for its inner chamber body is 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 arranging between spool 6 and valve pocket 5, this first hermetically-sealed construction along valve pocket 5 axially on be between the first liquid pass hole 51 and the second liquid pass hole 52, the first hermetically-sealed construction comprises and is enclosed within the first sealing ring 7 on spool 6 and is enclosed within the second sealing ring 8 on the first sealing ring 7, the outer circumference surface laminating of the inner peripheral surface of the first sealing ring 7 and spool 6, second 8 pairs of sealing rings the first sealing ring 7 applies radial pressure and makes the first sealing ring 7 and spool 6 close contacts, on the outer circumference surface of the first sealing ring 7, be also provided with the locating slot 71 that holds the first sealing ring 7.Because spool 6 is for movably, on the sidewall of spool 6 and be provided with liquid pass hole, by the first hermetically-sealed construction consisting of the first sealing ring 7 matching and the second sealing ring 8 is being set between spool 6 and valve pocket 5, the first sealing ring 7 is provided with the abnormity circle of locating slot 71 for outer circumference surface, when entering pressure fluid making spool 6 promote spring bases 3 to move in the inner chamber body of spool 6, pressure fluid enters in the liquid pass hole of spool 6 simultaneously, when spool 6 moves when liquid pass hole is alignd with the first sealing ring 7, pressure fluid can form erosion to the inner peripheral surface of the first sealing ring 7, the first sealing ring 7 is produced to pressure, and then can make the first sealing ring 7 have the trend radially expanding, and the second sealing ring 8 embeds in locating slot 71 the first sealing ring 7 formation extruding, avoid the first sealing ring 7 to expand, thereby what make that the first sealing ring 7 contacts with spool 6 is tightr, weaken the erosion to the inner peripheral surface of the first sealing ring 7 of pressure fluid from overflowing in the liquid pass hole of spool 6, thereby can improve sealing reliability and the application life of hermetically-sealed construction, finally can improve sealing performance.
Specifically, the abnormity circle of the first sealing ring 7 for adopting nylon material to make, preferably adopts high-strength nylon, and the first sealing ring 7 of nylon material has advantages of that intensity is high, precision is high and abrasion resistance is good, has higher application life and sealing effectiveness.The O RunddichtringO of the second sealing ring 8 for adopting quality of rubber materials to make, has certain elasticity.As shown in Fig. 5 and Fig. 7, the first sealing ring 7 is annular, its inner peripheral surface is the face of cylinder contacting with spool 6, the 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 be on the outer circumference surface of the first sealing ring 7 along the annular positioning groove of whole circumferential extension, and the vertical sectional shape of locating slot 71 is arc, its radian is 120 degree left and right, to adapt to the shape of the second sealing ring 8.The minimum diameter at locating slot 71 places of the first sealing ring 7 and the interior diameter of the second sealing ring 8 are roughly the same or be slightly larger than the interior diameter of the second sealing ring 8, can make like this second sealing ring 8 and the first sealing ring 7 close contacts.The first sealing ring 7 and the second sealing ring 8 form compound sealing structure, and second 8 pairs of sealing rings the first sealing ring 7 is exerted pressure and made the first sealing ring 7 and spool 6 positiver sealings.
As preferably, the hermetically-sealed construction of this core assembly is also included in the second hermetically-sealed construction arranging between spool 6 and valve pocket 5.As shown in Fig. 1 and Fig. 6, the second hermetically-sealed construction is identical with the first hermetically-sealed construction, also be to 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.The first hermetically-sealed construction is the position that is positioned at the insertion valve casing 9 of valve pocket 5, are the positions that are positioned at the insertion joint 4 of 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, the second hermetically-sealed constructions.Because valve pocket 5 is provided with liquid pass hole at Liang Chu vertically, the two places liquid pass hole corresponding with the first liquid pass hole 51 on valve pocket 5 and the second liquid pass hole 52 respectively at least also will be set on corresponding spool 6 vertically, therefore, the first hermetically-sealed construction and the second hermetically-sealed construction are set between valve pocket 5 and spool 6, thereby can further improve the sealing performance of safety valve sealing structure, improve sealing effectiveness.
As depicted in figs. 1 and 2, the inner chamber body of holding spool 6 that valve pocket 5 centers arrange is the stepped hole to other end that extends axially since an end face along valve pocket 5, inner chamber body comprises the chamber, large footpath 53 being communicated with the first liquid pass hole 51 and the path chamber 55 being 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.The first liquid pass hole 51 is arranged on the sidewall in chamber, the large footpath of encirclement 53 of valve pocket 5, the first liquid pass hole 51 is for running through the circular hole of valve pocket 5 sidewalls, and the first liquid pass hole 51 unloading hole toward the outer side 43 positions on valve pocket 5 sidewalls tilt to extend, the i.e. axes intersect of the axis of the first liquid pass hole 51 and valve pocket 5, angle is between the two less than 90 degree, and the unloading hole 43 of joint 4 is over against the first liquid pass hole 51.The 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 sidewalls, and the axis of the axis of the second liquid pass hole 52 and valve pocket 5 is perpendicular.
As shown in Figure 2, the inner chamber body of valve pocket 5 also comprises the central diameter chamber 54 between large chamber 53, footpath 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 threes are coaxial.In valve pocket 5, chamber, 54Yu great footpath, central diameter chamber 53 forms first internal face 516, and between path chamber 55 and central diameter chamber 54, forming second internal face 517, the first internal faces 516 is the disk vertical with valve pocket 5 axis with the second internal face 517.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 figures 1 and 3, spool 6 comprises large footpath body in the chamber, large footpath 53 of inserting valve pocket 5 64 and inserts the path body 65 in the path chamber 55 of valve pocket 5, and large footpath body 64 and path body 65 are cylindrical.The external diameter of large footpath body 64 equates with the diameter in chamber, large footpath 53, the external diameter of path body 65 equates with the diameter in path chamber 55, the first sealing ring 7 of the first hermetically-sealed construction is enclosed within on path body 65, and the first sealing ring 7 of the second hermetically-sealed construction is enclosed within on large footpath body 64.Large footpath body 64 and path body 65 are coaxial and are integrated machine-shaping, form the spool 6 of integrative-structure, because the external diameter of large footpath body 64 is greater than the external diameter of path body 65, thereby the end face that large footpath body 64 is connected with path body 65 forms stop surface 69, and 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 for being communicated with the 3rd liquid pass hole 61 of chamber, large footpath 53 and spool 6 inner chamber body, path body 65 is provided with for being communicated with the 4th liquid pass hole 62 of path chamber 55 and spool 6 inner chamber body, on path body 65, be also provided with for being communicated with the 5th liquid pass hole 63 of 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, the 5th liquid pass hole 63 is also nearer apart from stop surface 69, and the 5th liquid pass hole 63 can be communicated with counter balance pocket 56 with spool 6 inner chamber body.
As shown in Figure 3, the inner chamber body of spool 6 comprises and setting gradually vertically and hole, large footpath 66, central diameter hole 67 and diameter holes 68 that aperture reduces gradually, hole, large footpath 66, central diameter hole 67 and diameter holes 68 threes are coaxial, and coaxial with spool 6, hole 66, large footpath, over against the working hole 41 of joint 4, is communicated with working hole 41.Large hole 66, footpath and central diameter hole 67 are positioned at the large footpath body 64 of spool 6, diameter holes 68 is the path bodies 65 that are positioned at spool 6, diameter holes 68 is along spool 6, axially towards the inside of path body 65, to extend a segment distance from the internal face of large footpath body 64, but does not run through path body 65.The aperture of hole, large footpath 66, central diameter hole 67 and diameter holes 68 reduces gradually, thereby can to the pressure fluid in inflow spool 6, have the effect of damping, slows down the flow velocity of pressure fluid, reduces hydraulic shock.The 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 sidewalls, and the axis of the axis of the 3rd liquid pass hole 61 and spool 6 is perpendicular.The 4th liquid pass hole 62 and the 5th liquid pass hole 63 are communicated with diameter holes 68, and the 4th liquid pass hole 62 and the 5th liquid pass hole 63 be for running through the circular hole of spool 6 sidewalls, and the axis of the 4th liquid pass hole 62 and the 5th liquid pass hole 63 and the axis of spool 6 perpendicular.
The 3rd liquid pass hole 61, the 4th liquid pass hole 62 and the 5th liquid pass hole 63 edge on the sidewall of spool 6 is circumferentially uniform a plurality of, the 5th liquid pass hole 63 is between the 3rd liquid pass hole 61 and the 4th liquid pass hole 62, the certain distance in interval 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, stretch out in the unloading cavity 42 of the outer insertion joint 4 of valve pocket 5 one end of spool 6, 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, safety valve axially on, distance between the axis of the axis of the 3rd liquid pass hole 61 and the 4th liquid pass hole 62 is greater than the distance between the axis of the first liquid pass hole 51 and the axis of the second liquid pass hole 52, and the 5th liquid pass hole 63 is communicated with counter balance pocket 56 with the diameter holes 68 in spool 6.
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 the pressure fluid flowing through being there is to the damping hole of damping.The 5th liquid pass hole 63 is for to the interior stuffing pressure liquid of counter balance pocket 56, when the pressure fluid flowing at the working hole 41 from joint 4 enters and promotes spool 6 inner chamber body of spool 6 and move, some pressure fluid can 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, alleviated to a great extent the hydraulic shock of spool 6 moments unlatching, and reduce the axial compression of 6 pairs of spring bases 3 of spool, make the unlatching of safety valve stable in time, seal and the miscellaneous part of safety valve have well been protected, greatly increased the application life of safety valve.
As shown in Figure 1, in the central diameter chamber 54 of valve pocket 5, be also provided with 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 corresponding internal thread that is provided with of inwall in the central diameter chamber 54 of valve pocket 5, swivel nut 10 is fixed in valve pocket 5, the first hermetically-sealed construction is adjacent with swivel nut 10 positions, swivel nut 10 can carry out spacing to the first hermetically-sealed construction on the one hand in the axial direction, the installation that facilitates the first hermetically-sealed construction on the other hand, by swivel nut 10 is screwed in central diameter chamber 54, swivel nut 10 can promote two sealing rings of the first hermetically-sealed construction and clamp-on in the first internal channel 58 in valve pocket 5, thereby can be quick, the first hermetically-sealed construction is installed easily.The through hole that the center of swivel nut 10 being provided with allows the path body 65 of spool 6 pass, the external diameter equal and opposite in direction of the aperture of this through hole and path body 65.
As depicted in figs. 1 and 2, the external diameter at the position that is positioned at valve casing 9 of valve pocket 5 is less than the external diameter at the position that is positioned at joint 4 of valve pocket 5, at the two ends of valve pocket 5, be respectively equipped with for first outer channel 512 and second outer channel 513 of sealing ring are set, on the outer circumference surface at the position that is positioned at joint 4 of valve pocket 5, be provided with the 3rd outer channel 514, the 3rd outer channel 514 is along the annular groove circumferentially extending on the outer circumference surface of valve pocket 5, the 3rd outer channel 514 is also communicated with the first liquid pass hole 51, the 3rd outer channel 514 makes the first liquid pass hole 51 be communicated with unloading cavity 42 and unloading hole 43.The 3rd outer channel 514 is set on valve pocket 5, thereby on valve pocket 5, form an annular limited block 515, this limited block 515 is adjacent with valve casing 9, and on valve pocket 5 is axial, the certain distance in interval between the end face of limited block 515 and valve casing 9, footpath at valve pocket 5 makes progress, the certain distance in interval between the outer circumference surface of limited block 515 and the inner peripheral surface of joint 4.On the outer circumference surface at the position that is positioned at valve casing 9 of valve pocket 5, be also provided be communicated with the second liquid pass hole 52 cross liquid bath 57, cross liquid bath 57 on the outer circumference surface of valve pocket 5 along the annular groove of whole circumferential extension, cross liquid bath 57 and also since the second liquid pass hole 52 places, along valve pocket 5, extend axially to limited block 515 places.Liquid bath 57 was set on valve pocket 5, thereby make the gap that between valve pocket 5 and the inner peripheral surface of valve casing 9 ends, formation allows pressure fluid pass through, the pressure fluid flowing out from the second liquid pass hole 52 can enter liquid bath 57, and the pressure fluid entering in liquid bath 57 can flow to unloading hole 43 in the gap between limited block 515 and valve casing 9 and the inner peripheral surface of joint 4.By liquid bath 57 was set, 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, discharge, without position corresponding with the second liquid pass hole 52 on joint 4 or valve casing 9, a unloading hole being communicated with the second liquid pass hole 52 is set again, thereby can simplify the structure of valve casing 9 and joint 4, save material, convenient processing, reduces costs.
In safety valve opening process, the 4th liquid pass hole 62 on spool 6 is crossed after the first hermetically-sealed construction, four liquid pass hole 62 of the pressure fluid of small part on spool 6, the second liquid pass hole 52 on valve pocket 5, cross liquid bath 57 and unloading cavity 42 flows to unloading hole 43, the 3rd liquid pass hole 61 on spool 6 is crossed after the second hermetically-sealed construction, most pressure fluid is through the 3rd liquid pass hole 61, the first liquid pass hole 51 and unloading cavity 42 on valve pocket 5 flow to unloading hole 43, now entering pressure fluid in spool 6 is divided into two-way and through the 3rd liquid pass hole 61 and the 4th liquid pass hole 62, flows to liquid pass hole on valve pocket 5 and the unloading cavity 42 of joint 4 respectively, finally from unloading hole 43, discharge.Pressure fluid is divided into two-way discharges, and can reduce hydraulic shock on the one hand, can improve off-load speed on the other hand.
As shown in Fig. 1 and Fig. 9, in the endoporus of valve casing 9, be provided with a limited step, thereby form one for spacing to one end of valve pocket 5 in the axial direction step surface 91, the other end of valve pocket 5 is undertaken spacing by joint 4, valve pocket 5 is to insert in valve casing 9, is not directly connected, and is entangled by joint 4 with valve casing 9, by Screw joint 4, finally make valve pocket 5 fixing.
The hermetically-sealed construction of this core assembly also comprises the 3rd sealing ring 13 on the path body 65 that is enclosed within spool 6, be enclosed within the 4th sealing ring 14 on the large footpath body 64 of spool 6, the 5th sealing ring 15 and the 6th sealing ring 16, the three sealing rings 13, the 4th sealing ring 14, the 5th sealing ring 15 and the 6th sealing ring 16 being enclosed within on valve pocket 5 is the O RunddichtringO that adopts quality of rubber materials to make.The 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 the sealing between valve pocket 5 and valve casing 9 and joint 4.As shown in Fig. 2 and Figure 12, for the ease of each sealing ring of hermetically-sealed construction is set, corresponding in valve pocket 5 inside, be provided be respectively used to hold the first internal channel 58 of the first hermetically-sealed construction, for holding the second internal channel 59 of the second hermetically-sealed construction, for holding the 3rd internal channel 510 of the 3rd sealing ring 13 and for holding the 4th internal channel 511 of the 4th sealing ring 14, the first outer channel 512 arranging on valve pocket 5 outer circumference surfaces is to be for holding the 6th sealing ring 16 for holding the 5th sealing ring 15, the second outer channel 513.
Specifically, the first internal channel 58 and the 3rd internal channel 510 are along the annular groove circumferentially extending on the inner peripheral surface at 55 places, path chamber of valve pocket 5, the 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 places in central diameter chamber 54 vertically, so that the installation of two sealing rings of the first hermetically-sealed construction.
The second internal channel 59 and the 4th internal channel 511 are along the annular groove circumferentially extending on the inner peripheral surface at 53 places, chamber, large footpath of valve pocket 5, the 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 sealing rings of the second hermetically-sealed construction.
The first outer channel 512 and the second outer channel 513 are along the annular groove circumferentially extending on the outer circumference surface of valve pocket 5, the first outer channel 512 is positioned at valve casing 9, between the end face of the first outer channel 512 end in the insertion valve casing 9 of the second liquid pass hole 52 and valve pocket 5, the second outer channel 513 is positioned at joint 4, the second outer channel 513 is adjacent with the 3rd outer channel 514 positions, and the second outer channel 513 also extends to the end of valve pocket 5 vertically.
At the 3rd internal channel 510 and interior the 3rd sealing ring 13 and the 4th sealing ring 14 of arranging of the 4th internal channel 511, thereby can improve the sealing performance between valve pocket 5 and spool 6, in the first outer channel 512 with the second outer channel 513 is interior that the 5th sealing ring 15 and the 6th sealing ring 16 are set, thereby can improve the sealing performance between valve pocket 5 and valve casing 9 and joint 4.
On the inner peripheral surface at 53 places, chamber, large footpath of valve pocket 5, corresponding the first liquid pass hole 51 places are provided with the 5th internal channel 518, on the inner peripheral surface at 55 places, path chamber of valve pocket 5, corresponding the second liquid pass hole 52 places are provided with the 6th internal channel 519, the 5th internal channel 518 and the 6th internal channel 519 are annular groove, the 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 safety valve, as shown in Fig. 9 and Figure 11, the spring base 3 of the resetting-mechanism of safety valve is to consist of guide section 32, the first boss 31 and the second boss 33, guide section 32 is circular block structure, and the first boss 31 and the second boss 33 are respectively at the be connected to form one spring base 3 of structure of a side of guide section 32 and guide section 32.The first boss 31 and the second boss 33 are coaxial with guide section 32, the first boss 31 is cylindrical, the second boss 33 is spherical, the second boss 33 is for inserting the path chamber 55 of valve pocket 5 and the end contact of spool 6, to promote spool 6, move or bear the active force that spool 6 applies, the end face contacting with the second boss 33 on the path body 65 of spool 6 is the plane vertical with its axis.Back-moving spring 2 is helical spring, and the first boss 31 is for inserting back-moving spring 2, one end of back-moving spring 2 to be positioned.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, between guide section 32 and valve casing 9, leaves gap.
As shown in Figure 9 and Figure 10, voltage regulation screw 1 comprises the thread segment 11 being connected with valve casing 9 and the 3rd boss 12 protruding on thread segment 11, thread segment 11 is established threaded cylindrical structural on outer circumference surface, correspondingly on the inner peripheral surface of the end of valve casing 9, be provided with internal thread, the 3rd boss 12 is identical with the first boss 31 diameter cylindrical, and the 3rd boss 12 is coaxial with thread segment 11.The 3rd boss 12 is for inserting back-moving spring 2, the other end of back-moving spring 2 to be positioned, by the first boss 31 and the 3rd boss 12 are set, can be so that the axial location of back-moving spring 2 be more reliable, back-moving spring 2 can curved incline in valve casing 9, can not occur diametrically displacement, improved the steering capability to back-moving spring 2, guaranteed that the axial force of back-moving spring 2 is more excellent.
As shown in Figure 9, the 3rd boss 12 center on voltage regulation screw 1 is provided with an air vent 17, thread segment 11 center is provided with an inner hexagonal hole 18 being communicated with air vent 17, air vent 17 is for extending to vertically the circular hole of the end face of the 3rd boss 12, 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.Due between the core assembly of spring base 3 one sides and valve casing 9 by the 5th sealing ring 15 sealings, air vent 17 is communicated with inner hexagonal hole 18, thereby the space at resetting-mechanism place in valve casing 9 endoporus can be in communication with the outside, it is unsealed making space, resetting-mechanism place, guarantees that spring base 3 can move around.
The nominal pressure of the 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 the present invention is exemplarily described.Obviously, specific implementation of the present invention is not subject to the restrictions described above.So long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; Or without improvement, above-mentioned design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. the core assembly of a safety valve, comprise valve pocket and spool, safety valve also comprises joint and valve casing, insert in joint valve pocket one end, 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 insert in valve pocket and and valve pocket between be provided with the first hermetically-sealed construction, the first hermetically-sealed construction is between the first liquid pass hole and the second liquid pass hole, the first hermetically-sealed construction comprises the first sealing ring being enclosed within on spool and is enclosed within the second sealing ring on the first sealing ring, the outer circumference surface of the first sealing ring is provided with the locating slot that holds the first sealing ring.
2. the core assembly of safety valve according to claim 1, is characterized in that: described locating slot on the outer circumference surface of described the first sealing ring along the annular positioning groove of whole circumferential extension, and the vertical sectional shape of locating slot is arc.
3. the core assembly of safety valve according to claim 1 and 2, is characterized in that: between described spool and described valve pocket, be provided with second hermetically-sealed construction identical with described the first hermetically-sealed construction.
4. the core assembly of safety valve according to claim 3, it is characterized in that: described the first hermetically-sealed construction is positioned at the position of the described valve casing of insertion of described valve pocket, described the second hermetically-sealed construction is positioned at the position of the described joint of insertion of valve pocket, and the second hermetically-sealed construction is between described the first liquid pass hole and the end face of valve pocket.
5. the core assembly of safety valve according to claim 4, it is characterized in that: in described valve pocket, be provided with the inner chamber body of holding described spool and extending to vertically other end from an end face, inner chamber body comprises the chamber, large footpath being communicated with described the first liquid pass hole and the path chamber being communicated with described the second liquid pass hole, and the diameter in chamber, large footpath is greater than the diameter in path chamber.
6. the core assembly of safety valve according to claim 5, it is characterized in that: described spool comprises the large footpath body inserting in chamber, described large footpath and inserts the path body in described path chamber, large footpath body is provided with for being communicated with the 3rd liquid pass hole of chamber, large footpath and valve core cavity body, and path body is provided with for being communicated with the 4th liquid pass hole of path chamber and valve core cavity body.
7. the core assembly of safety valve according to claim 6, 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 being provided with valve pocket in central diameter chamber is the swivel nut being threaded, in swivel nut, be provided with the hole that allows the path body of described spool pass.
8. the core assembly of safety valve according to claim 7, it is characterized in that: the path body of described spool is provided with for being communicated with the 5th liquid pass hole of described chamber, large footpath and valve core cavity body, and the 5th liquid pass hole is between described the 4th liquid pass hole and the end face of described large footpath body.
9. the core assembly of safety valve according to claim 8, it is characterized in that: the inner chamber body of described spool comprises and setting gradually vertically and hole, large footpath, central diameter hole and diameter holes that aperture reduces gradually, described the 3rd liquid pass hole is communicated with hole, large footpath, and described the 4th liquid pass hole and described the 5th liquid pass hole are communicated with diameter holes.
10. the core assembly of safety valve according to claim 9, it is characterized in that: the outer circumference surface at the position that is positioned at described valve casing of described valve pocket is provided with the liquid bath of crossing being communicated with described the second liquid pass hole, cross liquid bath and between described the first liquid pass hole and the second liquid pass hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410383925.9A CN104141501B (en) | 2014-08-06 | 2014-08-06 | A kind of core assembly of safety valve |
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| CN201410383925.9A CN104141501B (en) | 2014-08-06 | 2014-08-06 | A kind of core assembly of safety valve |
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| CN104141501B CN104141501B (en) | 2016-02-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387144A (en) * | 2017-09-21 | 2017-11-24 | 鸿大智能机械有限公司 | The core assembly of safety valve |
| CN107401416A (en) * | 2017-09-21 | 2017-11-28 | 鸿大智能机械有限公司 | Safety valve |
| CN107503784A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | Safety valve |
| CN107503783A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | The valve element of safety valve |
| CN107503785A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | The core assembly of safety valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201802419U (en) * | 2010-09-02 | 2011-04-20 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve with pressure balancing cavity |
| CN202039871U (en) * | 2011-03-31 | 2011-11-16 | 乐清市东风煤矿设备有限公司 | Safety valve |
| CN202469103U (en) * | 2012-03-07 | 2012-10-03 | 浙江华东矿用设备有限公司 | Safety valve |
| CN203296783U (en) * | 2013-04-07 | 2013-11-20 | 淮北扬帆有色冶金科技有限公司 | Hydraulic three-purpose valve combined by single props |
| CN203335110U (en) * | 2013-06-25 | 2013-12-11 | 丰隆液压有限公司 | Compound seal safety valve with rated flow being 320L/min |
| 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 |
| CN203978463U (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 safety valve |
-
2014
- 2014-08-06 CN CN201410383925.9A patent/CN104141501B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201802419U (en) * | 2010-09-02 | 2011-04-20 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve with pressure balancing cavity |
| CN202039871U (en) * | 2011-03-31 | 2011-11-16 | 乐清市东风煤矿设备有限公司 | Safety valve |
| CN202469103U (en) * | 2012-03-07 | 2012-10-03 | 浙江华东矿用设备有限公司 | Safety valve |
| CN203296783U (en) * | 2013-04-07 | 2013-11-20 | 淮北扬帆有色冶金科技有限公司 | Hydraulic three-purpose valve combined by single props |
| CN203335110U (en) * | 2013-06-25 | 2013-12-11 | 丰隆液压有限公司 | Compound seal safety valve with rated flow being 320L/min |
| 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 |
| CN203978463U (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 safety valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387144A (en) * | 2017-09-21 | 2017-11-24 | 鸿大智能机械有限公司 | The core assembly of safety valve |
| CN107401416A (en) * | 2017-09-21 | 2017-11-28 | 鸿大智能机械有限公司 | Safety valve |
| CN107503784A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | Safety valve |
| CN107503783A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | The valve element of safety valve |
| CN107503785A (en) * | 2017-09-21 | 2017-12-22 | 鸿大智能机械有限公司 | The core assembly of safety valve |
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|---|---|
| CN104141501B (en) | 2016-02-24 |
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Inventor after: Li Fuhong Inventor after: Gao Junqiang Inventor after: He Liang Inventor after: Tao Jian Inventor after: Li Lewei Inventor after: Zhu Shuqun Inventor after: Xie Rui Inventor after: Li Yong Inventor after: Li Ziang Inventor after: Lin Wenbin Inventor after: Tao Xing Inventor after: Chen Wei Inventor after: Xi Guangrong Inventor before: Li Fuhong Inventor before: Zhu Shuqun |
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Effective date of registration: 20171113 Address after: Zhi Zhen Wuhu County in Anhui province Wuhu city Anhui Bay 241000 Wuhu Economic Development Zone Sunshine Road No. 768 building 06 Patentee after: Hongda Intelligent Machinery Co., Ltd. Address before: 241000 Wuhu County, Anhui Province Machinery Industrial Park, Wuhu Patentee before: Julong Group Wuhu Xinglong Hydraulic Co., Ltd. |
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