CN203978464U - A sealing structure of a safety valve - Google Patents
A sealing structure of a safety valve Download PDFInfo
- Publication number
- CN203978464U CN203978464U CN201420442084.XU CN201420442084U CN203978464U CN 203978464 U CN203978464 U CN 203978464U CN 201420442084 U CN201420442084 U CN 201420442084U CN 203978464 U CN203978464 U CN 203978464U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- liquid pass
- valve
- valve pocket
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 213
- 239000007788 liquid Substances 0.000 claims abstract description 142
- 238000010276 construction Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000003313 weakening effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 21
- 230000002093 peripheral effect Effects 0.000 description 13
- 239000003245 coal Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses a sealing structure of a safety valve, the safety valve comprises a joint, a valve casing, a valve sleeve and a valve core, one end of the valve sleeve is inserted into the joint, the other end is inserted into the valve casing, the valve sleeve is provided with a first liquid passing hole and a second liquid passing hole, the sealing structure comprises a first sealing unit arranged between the valve core and the valve sleeve, the first sealing unit is positioned between the first liquid passing hole and the second liquid passing hole, the first sealing unit comprises a first sealing ring sleeved on the valve core and a second sealing ring sleeved on the first sealing ring, the outer circumference of the first sealing ring is a special-shaped ring provided with a positioning groove, the second sealing ring is embedded into the positioning groove to extrude the first sealing ring, thereby leading the first sealing ring to be more closely contacted with the valve core, weakening the erosion of pressure liquid overflowing from the liquid passing hole of the valve core to the inner circumference of the first sealing ring, thereby improving the sealing reliability and the service life of, and finally, the sealing effect between the valve core and the valve sleeve can be improved.
Description
Technical field
The utility model relates to coal mine fully-mechanized mining hydraulic support, and specifically, the utility model relates to a kind of hermetically-sealed construction 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.
Utility model content
The utility model provides a kind of hermetically-sealed construction of safety valve, and object is to improve sealing effectiveness.
To achieve these goals, the technical scheme that the utility model is taked is: a kind of hermetically-sealed construction of safety valve, safety valve comprises joint, valve casing, valve pocket and spool, joint is provided with working hole and unloading hole, spool is provided with the inner chamber body being communicated with the working hole of joint, insert in joint valve pocket one end, the other end inserts in valve casing, the position that valve pocket is positioned at joint is provided with the first liquid pass hole being communicated with unloading hole, the position that valve pocket is positioned at valve casing is provided with the second liquid pass hole being communicated with unloading hole, spool inserts in valve pocket, described hermetically-sealed construction is included in the first sealing unit arranging between described spool and described valve pocket, the first sealing unit is between described the first liquid pass hole and described the second liquid pass hole, the first sealing unit 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.
The hermetically-sealed construction of safety valve is also included in second sealing unit identical with described the first sealing unit arranging between described spool and described valve pocket.
Described the first sealing unit is positioned at the position of the described valve casing of insertion of described valve pocket, and described the second close unit structure is positioned at the position of the described joint of insertion of valve pocket, and the second sealing unit is between described the first liquid pass hole and the end face of valve pocket.
The material of described the first sealing ring is nylon, the O RunddichtringO of described the second sealing ring for adopting quality of rubber materials to make.
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 hermetically-sealed construction of safety valve also comprises the 3rd sealing ring on the path body that is enclosed within described spool, and the 3rd sealing ring and described the first sealing unit are positioned at the both sides of described the second liquid pass hole.
The hermetically-sealed construction of safety valve also comprises the 4th sealing ring on the large footpath body that is enclosed within described spool, and the 4th sealing ring and described the second sealing unit are positioned at the both sides of described the first liquid pass hole.
The hermetically-sealed construction of safety valve also comprises the 5th sealing ring being enclosed within on described valve pocket, and the 5th sealing ring is between described the second liquid pass hole and the end face of valve pocket.
The hermetically-sealed construction of safety valve also comprises the 6th sealing ring being enclosed within on described valve pocket, and the 6th sealing ring is between described the first liquid pass hole and the end face of valve pocket.
Described the 3rd sealing ring, described the 4th sealing ring, described the 5th sealing ring and described the 6th sealing ring are the O RunddichtringO that adopts quality of rubber materials to make.
The hermetically-sealed construction of the utility model safety valve, be included in the first sealing unit consisting of two sealing rings that match is set between spool and valve pocket, 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 the utility model hermetically-sealed construction;
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 sealing unit 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 that adopts the core assembly of the utility model hermetically-sealed construction;
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 utility model 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 utility model, technical scheme, and contributes to its enforcement.
Be illustrated in figure 1 a kind of safety valve that adopts the utility model hermetically-sealed construction, 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 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.
This hermetically-sealed construction is arranged on the core assembly of safety valve, and this hermetically-sealed construction is used for realizing between valve casing 9 and joint 4 between sealing and valve pocket 5 and spool 6 and seals.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.
This hermetically-sealed construction is included in the first sealing unit arranging between spool 6 and valve pocket 5, this first sealing unit along valve pocket 5 axially on be between the first liquid pass hole 51 and the second liquid pass hole 52, the first sealing unit 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 sealing unit 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, this hermetically-sealed construction is also included in the second sealing unit arranging between spool 6 and valve pocket 5.As shown in Fig. 1 and Fig. 6, the second sealing unit is identical with the first sealing unit, 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 sealing unit, but, according to the first sealing unit and the second sealing unit position, the size of the size of two sealing rings of the first sealing unit and two sealing rings of the second sealing unit is had any different.The first sealing unit 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 sealing unit 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 sealing units.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 sealing unit and the second sealing unit 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 sealing unit is enclosed within on path body 65, and the first sealing ring 7 of the second sealing unit 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 sealing unit is adjacent with swivel nut 10 positions, swivel nut 10 can carry out spacing to the first sealing unit on the one hand in the axial direction, the installation that facilitates the first sealing unit 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 sealing unit and clamp-on in the first internal channel 58 in valve pocket 5, thereby can be quick, the first sealing unit 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 sealing unit, 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 sealing unit, 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.
This hermetically-sealed construction 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 sealing unit, for holding the second internal channel 59 of the second sealing unit, 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 sealing unit.
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 sealing unit.
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.
The core assembly of safety valve matches with resetting-mechanism, 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 utility model is exemplarily described.Obviously, the utility model specific implementation is not subject to the restrictions described above.So long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; Or without improvement, above-mentioned design of the present utility model and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (10)
1. the hermetically-sealed construction of a safety valve, safety valve comprises joint, valve casing, valve pocket and spool, joint is provided with working hole and unloading hole, spool is provided with the inner chamber body being communicated with the working hole of joint, insert in joint valve pocket one end, the other end inserts in valve casing, the position that valve pocket is positioned at joint is provided with the first liquid pass hole being communicated with unloading hole, the position that valve pocket is positioned at valve casing is provided with the second liquid pass hole being communicated with unloading hole, spool inserts in valve pocket, it is characterized in that: described hermetically-sealed construction is included in the first sealing unit arranging between described spool and described valve pocket, the first sealing unit is between described the first liquid pass hole and described the second liquid pass hole, the first sealing unit 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 hermetically-sealed construction 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 hermetically-sealed construction of safety valve according to claim 1 and 2, is characterized in that: be also included in second sealing unit identical with described the first sealing unit arranging between described spool and described valve pocket.
4. the hermetically-sealed construction of safety valve according to claim 3, it is characterized in that: described the first sealing unit is positioned at the position of the described valve casing of insertion of described valve pocket, described the second close unit structure is positioned at the position of the described joint of insertion of valve pocket, and the second sealing unit is between described the first liquid pass hole and the end face of valve pocket.
5. the hermetically-sealed construction of safety valve according to claim 4, is characterized in that: the material of described the first sealing ring is nylon, the O RunddichtringO of described the second sealing ring for adopting quality of rubber materials to make.
6. the hermetically-sealed construction of safety valve according to claim 5, 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; 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; Described hermetically-sealed construction also comprises the 3rd sealing ring on the path body that is enclosed within described spool, and the 3rd sealing ring and described the first sealing unit are positioned at the both sides of described the second liquid pass hole.
7. the hermetically-sealed construction of safety valve according to claim 6, is characterized in that: also comprise the 4th sealing ring on the large footpath body that is enclosed within described spool, the 4th sealing ring and described the second sealing unit are positioned at the both sides of described the first liquid pass hole.
8. the hermetically-sealed construction of safety valve according to claim 7, is characterized in that: also comprise the 5th sealing ring being enclosed within on described valve pocket, the 5th sealing ring is between described the second liquid pass hole and the end face of valve pocket.
9. the hermetically-sealed construction of safety valve according to claim 8, is characterized in that: also comprise the 6th sealing ring being enclosed within on described valve pocket, the 6th sealing ring is between described the first liquid pass hole and the end face of valve pocket.
10. the hermetically-sealed construction of safety valve according to claim 9, is characterized in that: described the 3rd sealing ring, described the 4th sealing ring, described the 5th sealing ring and described the 6th sealing ring are the O RunddichtringO that adopts quality of rubber materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442084.XU CN203978464U (en) | 2014-08-06 | 2014-08-06 | A sealing structure of a safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442084.XU CN203978464U (en) | 2014-08-06 | 2014-08-06 | A sealing structure of a safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978464U true CN203978464U (en) | 2014-12-03 |
Family
ID=51975923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420442084.XU Expired - Fee Related CN203978464U (en) | 2014-08-06 | 2014-08-06 | A sealing structure of a safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422159A (en) * | 2016-01-25 | 2016-03-23 | 巨隆集团芜湖兴隆液压有限公司 | Large flow overflow safety valve |
-
2014
- 2014-08-06 CN CN201420442084.XU patent/CN203978464U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422159A (en) * | 2016-01-25 | 2016-03-23 | 巨隆集团芜湖兴隆液压有限公司 | Large flow overflow safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104153795B (en) | Safety valve | |
| CN211230346U (en) | Well head sealer | |
| CN104141501B (en) | A valve core assembly of a safety valve | |
| CN111485843B (en) | Automatic reversible two-way water hole grinding shoe | |
| CN203978460U (en) | A New Type of Large Flow Safety Valve | |
| CN105317450A (en) | A large flow safety valve | |
| CN203978462U (en) | A New Type of Safety Valve | |
| CN104153794A (en) | A spool assembly of a large flow safety valve | |
| CN204060739U (en) | A large flow safety valve | |
| CN105257323A (en) | Medium-flow safety valve | |
| CN208474570U (en) | one-way valve | |
| CN203978463U (en) | A valve core assembly of a safety valve | |
| CN105332725A (en) | Novel safety valve | |
| CN204060740U (en) | a safety valve | |
| CN203925539U (en) | A large flow safety valve | |
| CN203978461U (en) | A spool assembly of a large flow safety valve | |
| CN103867718A (en) | Ball-swelling type high-pressure end cap | |
| CN203962007U (en) | A Medium Flow Hydraulic Control Check Valve | |
| CN204060738U (en) | A sealing structure of a large flow safety valve | |
| CN206129781U (en) | Rotary clamping hydraulic means | |
| CN104141502B (en) | A large flow safety valve | |
| CN203925537U (en) | A Medium Flow Safety Valve | |
| CN205445950U (en) | A piston for two -way ramp type compressor | |
| CN219159624U (en) | Novel one-way valve with buffer | |
| CN105332723A (en) | Novel large-flow safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20160806 |