CN108561168A - Alternately check valve - Google Patents
Alternately check valve Download PDFInfo
- Publication number
- CN108561168A CN108561168A CN201810492017.1A CN201810492017A CN108561168A CN 108561168 A CN108561168 A CN 108561168A CN 201810492017 A CN201810492017 A CN 201810492017A CN 108561168 A CN108561168 A CN 108561168A
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- China
- Prior art keywords
- valve
- valve seat
- liquid pass
- pass hole
- hole
- 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.)
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Links
- 239000007788 liquid Substances 0.000 claims description 131
- 238000007789 sealing Methods 0.000 claims description 32
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of alternately check valves, including valve body and core assembly, it is the swivel nut being threadedly coupled that the core assembly, which includes with valve body, is the valve pocket being threadedly coupled, the first valve seat being connect with valve pocket, the second valve seat inside swivel nut and the spool inside valve pocket and to be movably arranged with swivel nut, and spool is between the first valve seat and the second valve seat.The alternating check valve of the present invention, valve seat, valve pocket and swivel nut link into an integrated entity, form the core assembly of plug-in, core assembly is structure as a whole, so that the level of integrated system of entire alternately check valve is higher, convenient for alternately check valve assembly and follow-up maintenance, that is, install it is simple, easy to maintenance, directly by replace cartridge valve core assembly can repair the alternating check valve.
Description
Technical field
The invention belongs to coal mine fully-mechanized mining hydraulic supports, specifically, the present invention relates to a kind of alternately check valves.
Background technology
Alternately check valve is one of widely used Hydraulic Elements in hydraulic bracket control system, in hydraulic support
In hydraulic system, when a working chamber of hydraulic cylinder needs to replace feed flows with two inlet tubes, and this two inlet tubes cannot
It is just needed when connection using alternately check valve, it is used for fully-mechanized mining working surface hydraulic support oil cylinder linkage and differential circuit.Existing friendship
It is more for check valve part, it can cause to assemble cumbersome, and repair can be caused inconvenient, service life is low, is easy to influence life
Production.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of friendship
For check valve, it is therefore an objective to improve integrated level, convenient for assembly and maintenance.
To achieve the goals above, the technical solution that the present invention takes is：Alternately check valve, including valve body and spool group
Part, it is the swivel nut being threadedly coupled that the core assembly, which includes with valve body, is connect with the valve pocket that swivel nut is threaded connection, with valve pocket
First valve seat, the second valve seat inside swivel nut and the spool inside the valve pocket and to be movably arranged, spool are located at the
Between one valve seat and the second valve seat.
The valve pocket is sheathed on first valve seat and the first valve seat is connect by screw with valve pocket, and valve pocket, which has, allows spiral shell
The internal thread hole being inserted into is followed closely, the first valve seat has the lock groove for allowing screw to be inserted into.
The lock groove is the annular groove entirely circumferentially extended in the periphery upper edge of first valve seat, the screw
It is to be uniformly distributed circumferentially that multiple and multiple screws, which are arranged,.
First valve seat is connect with one end of the valve pocket, second valve seat contacted with the other end face of valve pocket and
Second valve seat is clamped by valve pocket and the swivel nut.
The spool has primary sealing area for being contacted with first valve seat and for being connect with second valve seat
Tactile secondary sealing area.
The primary sealing area and the secondary sealing area are circular conical surface.
The valve pocket have allow liquid by the first liquid pass hole and the second liquid pass hole, the valve body have allows liquid to flow out
Drainage hole, drainage hole is connected to the first liquid pass hole and the second liquid pass hole.
In the axial direction of the core assembly, first liquid pass hole is located at second liquid pass hole and first valve seat
Between, the second liquid pass hole is between the first liquid pass hole and second valve seat, between the first liquid pass hole and the second liquid pass hole
Distance is less than the distance between the first liquid pass hole and the first valve seat, and the distance between the first liquid pass hole and the second liquid pass hole are less than the
The distance between two liquid pass holes and the second valve seat.
The axis of the drainage hole is located between the axis and the axis of second liquid pass hole of first liquid pass hole.
It is circumferentially equal on valve pocket that multiple and all first liquid pass holes, which are arranged, in first liquid pass hole on the valve pocket
Even distribution, it is circumferentially uniform on valve pocket that multiple and all second liquid pass holes, which are arranged, in second liquid pass hole on the valve pocket
Distribution.
The alternating check valve of the present invention, valve seat, valve pocket and swivel nut link into an integrated entity, and form the core assembly of plug-in, valve
Core assembly is structure as a whole so that the level of integrated system of entire alternately check valve is higher, convenient for the alternately assembly of check valve with after
It is continuous to safeguard, that is, it installs simple, easy to maintenance, directly can repair the alternating check valve by replacing cartridge valve core assembly.
Description of the drawings
This specification includes the following drawings, and shown content is respectively：
Fig. 1 is the sectional view of present invention alternating check valve；
Fig. 2 is the sectional view of core assembly；
Fig. 3 is the sectional view of valve body；
Fig. 4 is the sectional view of valve pocket；
Fig. 5 is the sectional view of spool；
Fig. 6 is the sectional view of swivel nut；
In figure label for：1, screw；2, valve body；201, the first inlet opening；202, valve chamber；203, drainage hole；3, the first valve
Seat；4, the second valve seat；5, valve pocket；501, first connecting portion；502, guide part；503, the first liquid pass hole；504, the second liquid pass hole；
505, internal thread hole；6, swivel nut；601, second connecting portion；602, third interconnecting piece；603, the second inlet opening；604, limiting section；
7, spool；701, primary sealing area；702, secondary sealing area；8, resetting spring.
Specific implementation mode
Below against attached drawing, by the description of the embodiment, making to the specific implementation mode of the present invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to the design of the present invention, technical solution
Solution, and contribute to its implementation.
As shown in Figures 1 to 6, the present invention provides a kind of alternately check valve, including valve body 2 and core assembly, spool groups
It is the swivel nut 6 being threadedly coupled that part, which includes with valve body 2, is the valve pocket 5 being threadedly coupled, the first valve seat being connect with valve pocket 5 with swivel nut 6
3, the resetting spring 8 inside valve pocket 5, the second valve seat 4 inside swivel nut 6 and positioned at the inside of valve pocket 5 and be removable
The spool 7 of setting, spool 7 is between the first valve seat 3 and the second valve seat 4.
Specifically, as depicted in figs. 1 and 2, valve pocket 5, spool 7, the first valve seat 3, the second valve seat 4, resetting spring 8 and spiral shell
Set 6 constitutes the core assembly of plug-in, and core assembly is structure as a whole.Spool 7 and resetting spring 8 are located at the inside of valve pocket 5,
One end of valve pocket 5 is fixedly connected with the first valve seat 3, and the other end of valve pocket 5 is fixedly connected with swivel nut 6, and resetting spring 8 is clipped in spool
Between 7 and swivel nut 6, the first valve seat 3 and the second valve seat 4 are positioned opposite, valve pocket 5, spool 7, the first valve seat 3,4 and of the second valve seat
Swivel nut 6 is coaxial arrangement.Resetting spring 8 is used to make it axially towards the effect moved at the first valve seat 3 application of spool 7
Power, to realize the reset of spool 7.Alternately check valve has first medium channel and second medium channel, and spool 7 is for may be selected
Property keeps first medium channel and second medium channel in the conduction state.Spool 7 is matched with the first valve seat 3, for controlling
The break-make in first medium channel.Spool 7 is arranged to switch between contact condition and discrete state with the first valve seat 3, when
When spool 7 and the first valve seat 3 are in contact condition, first medium channel is interrupted, and second medium channel is switched on, and liquid cannot
It is flowed through first medium channel, and liquid is flowed through second medium channel；Divide when spool 7 and the first valve seat 3 are in
When from state, first medium channel is switched on, and second medium channel is interrupted, and alternately check valve is in open state, liquid energy
It is flowed through first medium channel.Spool 7 is matched with the second valve seat 4, the break-make for controlling second medium channel.Spool
7 are arranged to switch between contact condition and discrete state with the second valve seat 4, are contacted when spool 7 is in the second valve seat 4
When state, second medium channel is interrupted, and first medium channel is switched on, and liquid cannot be flowed through second medium channel,
And liquid is flowed through first medium channel；When spool 7 and the second valve seat 4 are in discrete state, second medium channel quilt
Conducting, first medium channel are interrupted, and liquid can be flowed through second medium channel.
As shown in figures 1 and 3, the inside of valve body 2 has the valve chamber for accommodating core assembly, and valve chamber is the first of valve body 2
The circular cavity for holding end face to be formed initially towards the internal stretch of valve body 2, swivel nut 6 is inserted into the valve chamber of valve body 2 and swivel nut 6 and valve
Body 2 is to be threadedly coupled, and realizes that fixation of the core assembly on valve body 2, the first valve seat 3 and valve pocket 5 also are located at the valve chamber of valve body 2
In.For the inside tool of valve body 2 there are one the first inlet opening 201 and a drainage hole 203, the first inlet opening 201 and drainage hole 203 are equal
For circular hole and the axis perpendicular of the axis and drainage hole 203 of the first inlet opening 201, the first inlet opening 201 is coaxial with valve chamber
Setting, the first inlet opening 201 initially towards the internal stretch of valve body 2 and are extended to from valve chamber from the second end end face of valve body 2
Circular hole, the diameter of the first inlet opening 201 is less than the diameter of valve chamber, and the first end and second end of valve body 2 is opposite on valve body 2
Both ends, the end face of first end and the end face of second end are parallel.Drainage hole 203 be from the third end end face of valve body 2 initially towards
The internal stretch of valve body 2 and extend to the circular hole at valve chamber, drainage hole 203 be located at valve chamber radially and drainage hole 203 and valve
Chamber is connected to, the end face at third end and the end face of first end of valve body 2 and the end face of second end is perpendicular and the end face at third end position
Between the end face of first end and the end face of second end, the liquid in valve chamber flows out valve body 2 through drainage hole 203.
As shown in Figure 1, Figure 2 and Figure 4, valve pocket 5 is sheathed on the first valve seat 3 and the first valve seat 3 passes through screw 1 and valve pocket 5
There is the internal thread hole for allowing screw 1 to be inserted into, the first valve seat 3 to have the lock groove for allowing screw 1 to be inserted into for connection, valve pocket 5.First valve seat
3 are fixed on by screw 1 on valve pocket 5, one end of the first valve seat 3 and the inside for being inserted into valve pocket 5, the other end position of the first valve seat 3
In the valve chamber of valve body 2.First valve seat 3 and valve pocket 5 are linked into an integrated entity structure by screw 1, and the first valve seat 3 is relative to valve pocket 5
And can be rotated around its axis, the connection of the first valve seat 3 and valve pocket 5, in the axial direction, the first valve seat 3 are realized by screw 1
It is relatively fixed with the holding of valve pocket 5, the first valve seat 3 is not in improve and connected between the first valve seat 3 and swivel nut 6 the problem of falling off
Reliability, and improve core assembly dismounting when operating efficiency.
As shown in Figure 1, Figure 2 and Figure 4, lock groove is the annular that entirely circumferentially extends of periphery upper edge in the first valve seat 3
Groove, it is to be uniformly distributed circumferentially on valve pocket 5 that multiple and all screws 1, which are arranged, in screw 1.The internal thread hole being arranged on valve pocket 5
505 quantity is identical as the quantity of screw 1, and each screw 1 is respectively embedded into an internal thread hole 505, the axis of internal thread hole 505
The axis perpendicular of line and valve pocket 5, internal thread hole 505 and to extend radially through the through-hole of setting on the side wall of valve pocket 5.Locking
Slot is set on the periphery of the end inside the insertion valve pocket 5 of the first valve seat 3, and all screws 1 are distributed in the surrounding of lock groove,
A part for screw 1 is inserted into internal thread hole 505, and another part of screw 1 is inserted into lock groove, to which screw 1 can be in axis
Position-limiting action is played to the first valve seat 3 upwards so that valve pocket 5 links into an integrated entity with the first valve seat 3, while screw 1 can also be
It is circumferentially slided in lock groove so that the first valve seat 3 can be rotated relative to valve pocket 5, be mounted in core assembly
When in the valve chamber of valve body 2 or when being dismantled from valve chamber, the first valve seat 3 can be rotated and make valve in 3 rotary course of the first valve seat
Set 5 remains to keep connection status with the first valve seat 3, will not be detached between valve pocket 5 and the first valve seat 3.
As shown in Figure 1 to Figure 3, the first valve seat 3 is cirque structure and the first valve seat 3 and spool 7 is coaxial arrangement, first
It is that the centre bore of 7 partial insertion of spool, the centre bore is allowed to be in and be connected to the first inlet opening 201 of valve body 2 at the center of valve seat 3
State and centre bore and the first inlet opening 201 are coaxial, the largest outer diameter of spool 7 are more than the diameter of centre bore.First valve seat 3
Centre bore, the first inlet opening 201, valve chamber and drainage hole 203 are the part in first medium channel, when spool 7 and the first valve seat 3
When in discrete state, the first inlet opening 201 is connected to drainage hole 203, the first inlet opening 201, the first valve seat 3 centre bore,
First liquid pass hole 503, valve chamber and drainage hole 203 form first medium channel, and first medium channel is in the conduction state at this time, the
Centre bore, first liquid pass hole 503 and valve chamber of the liquid through the first valve seat 3 in one inlet opening 201 flow to drainage hole 203, finally
Liquid flows out valve body 2.When spool 7 and the first valve seat 3 are in contact condition, the first inlet opening 201 does not connect with drainage hole 203
Logical, first medium channel is interrupted.
As shown in Figure 1 to Figure 3, in the axial direction of core assembly, the first valve seat 3 be located at the first inlet opening 201 and spool 7 it
Between, the second valve seat 4 is between the second inlet opening 603 and spool 7.First valve seat 3 is connect with one end of valve pocket 5, the second valve seat 4
It is contacted with the other end face of valve pocket 5 and the second valve seat 4 is clamped by valve pocket 5 and swivel nut 6.First valve seat 3 and the second valve seat 4 are
Cirque structure, spool 7, the first valve seat 3 and the second valve seat 4 are all made of metal material and are made, spool 7 and the first valve seat 3 and
The material of two valve seats 4 is identical, and the hardness of the first valve seat 3 and the second valve seat 4 is less than the hardness of spool 7, spool 7 and the first valve seat 3
It is hard sealed connection with the second valve seat 4, enhances sealing performance.Spool 7, the first valve seat 3 and the second valve seat 4 use metal material
It is made, and to use vacuum hardening technology, refined again after quenching, hardness is high, and relative to the sealing of softwood matter, hard sealing is not only
Good seal performance, moreover it is possible to which resistance to super-pressure, alternately check valve service life is long.And spool 7 need to be handled by vacuum hardening to Lip river
Family name's hardness obtains high rigidity metal surface, between spool 7 and the first valve seat 3 and the second valve seat 4 in the ranges of HRC40~43
Sealing effect is good, improves the sealing performance of alternately check valve.It is formed between spool 7 and the first valve seat 3 and the second valve seat 4 hard close
Envelope, since valve body 2 is no longer directly connected and sealed with spool 7, also there is no need in order to meet for valve body 2 and/or swivel nut 6
Hard seal request and carry out corresponding heat treatment process, need to only carry out heat treatment process to the first valve seat 3 and the second valve seat 4, because
This can simplify the structure of valve body 2 and swivel nut 6, simplify processing technology, improve production efficiency.Preferably, valve rod, the first valve
Seat 3 and the second material of valve seat 4 are 3Cr13, relative to the sealing of softwood matter, using hard sealing, and shut-off valve not only leakproofness
It can be good, moreover it is possible to which resistance to super-pressure, service life are long.
As shown in Figure 1, Figure 2 and Figure 4, valve pocket 5 is the cylinder of both ends open and inner hollow, and valve pocket 5, which has, allows liquid
By the first liquid pass hole 503 and the second liquid pass hole 504, valve body 2 have allow liquid flow out drainage hole 203, drainage hole 203 with
First liquid pass hole 503 is connected to the second liquid pass hole 504.Valve pocket 5 includes the first connecting portion for setting gradually and being connected in an axial direction
501 and guide part 502, first connecting portion 501 and guide part 502 are cirque structure and first connecting portion 501 and guide part
502 coaxial arrangements, the interior diameter of first connecting portion 501 are more than the interior diameter of guide part 502, the overall diameter of first connecting portion 501
More than the overall diameter of guide part 502, the length of guide part 502 is more than the length of first connecting portion 501, and the first valve seat 3 is inserted into the
In the inner chamber body of one interconnecting piece 501 and the first valve seat 3 is connect by screw 1 with first connecting portion 501, internal thread hole 505 be from
Start along the inner headed face for extending radially to first connecting portion 501 of first connecting portion 501 on the periphery of first connecting portion 501
Through-hole.Spool 7 is located in the inner chamber body of guide part 502, and guide part 502 plays guiding role to spool 7, and spool 7 is being oriented to
Axial direction in the inner chamber body in portion 502 along guide part 502 is moved, the interior diameter of the largest outer diameter and guide part 502 of spool 7
Size is identical, and the length of spool 7 is less than the length of guide part 502.First liquid pass hole 503 and the second liquid pass hole 504 are set to and lead
To in portion 502, the first liquid pass hole 503 and the second liquid pass hole 504 are since on the periphery of guide part 502 along guide part 502
The inner headed face for extending radially to guide part 502 on through-hole, the first liquid pass hole 503 and the second liquid pass hole 504 be circular hole and
The axis of first liquid pass hole 503 and the second liquid pass hole 504 is parallel, and in the axial direction of valve pocket 5, the first liquid pass hole 503 is located at the
Between one interconnecting piece 501 and the second liquid pass hole 504, the second liquid pass hole 504 is between the second valve seat 4 and the first liquid pass hole 503.
It is to be uniformly distributed circumferentially on valve pocket 5 that multiple and all first liquid pass holes 503, which are arranged, in first liquid pass hole 503 on valve pocket 5, the
It is to be uniformly distributed circumferentially on valve pocket 5 that multiple and all second liquid pass holes 504, which are arranged, in two liquid pass holes 504 on valve pocket 5.First
Liquid pass hole 503 and the second liquid pass hole 504 are arranged to switch between opening state and closed state, and spool 7 is arranged to
Optionally make the first liquid pass hole 503 and the second liquid pass hole 504 in the open state.First liquid pass hole 503 is first medium
The part in channel, when spool 7 and the first valve seat 3 are in discrete state, the first liquid pass hole 503 is in the open state, spool 7
The second liquid pass hole 504 is covered, the second liquid pass hole 504 is closed, the center that the first inlet opening 201 passes through the first valve seat 3
Hole, the inner chamber body of guide part 502, the first liquid pass hole 503 and valve chamber are connected to drainage hole 203, the first inlet opening 201, the first valve
The centre bore of seat 3, the inner chamber body of guide part 502, the first liquid pass hole 503, valve chamber and drainage hole 203 form first medium channel,
First medium channel is in the conduction state at this time, centre bore, guide part of the liquid in the first inlet opening 201 through the first valve seat 3
502 inner chamber body, the first liquid pass hole 503 and valve chamber flow to drainage hole 203, and final liquid flows out valve body 2.When spool 7 and first
When valve seat 3 is in contact condition, spool 7 covers the first liquid pass hole 503, and the first liquid pass hole 503 is closed, the first feed liquor
Hole 201 is not connected to drainage hole 203, and first medium channel is interrupted, and the second liquid pass hole 504 is in the open state, and at this time second
Medium channel is in the conduction state.
As shown in Figure 1, Figure 2 and Figure 4, the first liquid pass hole 503 is identical with the diameter of the second liquid pass hole 504, in spool
In the axial direction of component, between the second liquid pass hole 504 and the first valve seat 3, the second liquid pass hole 504 is located at the first liquid pass hole 503
Between liquid pass hole and the second valve seat 4, the distance between the first liquid pass hole 503 and the second liquid pass hole 504 are less than the first liquid pass hole 503
The distance between first valve seat 3, the distance between the first liquid pass hole 503 and the second liquid pass hole 504 are less than the second liquid pass hole 504
The distance between second valve seat 4.The axis of drainage hole 203 is located at the axis and the second liquid pass hole 504 of the first liquid pass hole 503
Between axis, between the vertical range and the second liquid pass hole 504 and the second valve seat 4 between the first liquid pass hole 503 and the first valve seat 3
Vertical range size it is identical, the length of spool is slightly larger than the vertical range between the first liquid pass hole 503 and the first valve seat 3, the
Axial distance between one liquid pass hole 503 and the second liquid pass hole 504 is smaller, and the first liquid pass hole 503 and the second liquid pass hole 504 are concentrated
Middle position on the length direction of guide part 502 is set, and spool need to be only selected every time by the first liquid pass hole 503 or the second
Liquid pass hole 504 is closed so that the length of spool can be arranged shorter, save material, facilitate processing, reduce cost, and make
The overall volume that check valve must be replaced reduces, compact-sized.
As shown in Figure 1, Figure 2 and Figure 4, all first liquid pass holes 503 are uniformly distributed circumferentially on guide part 502, institute
It is also to be uniformly distributed circumferentially on guide part 502 to have the second liquid pass hole 504.
As shown in figs. 1,2 and 6, swivel nut 6 is both ends open and the cylinder of inner hollow, and one end of valve pocket 5 is inserted into
The inside of swivel nut 6 and be is threadedly coupled with swivel nut 6, one end of swivel nut 6 is inserted into the valve chamber of valve body 2 and swivel nut 6 and valve body 2 are spiral shell
Line connects, correspondingly, swivel nut 6 is equipped with external screw thread and internal thread, the other end of swivel nut 6 extend out to the outside of valve body 2, convenient for it is outer
The oil connection grafting in portion.For the tool of swivel nut 6 there are one the second inlet opening 603, the second inlet opening 603 is circular hole and the second inlet opening
The axis perpendicular of 603 axis and drainage hole 203, the second inlet opening 603 and the first inlet opening 201 are to be coaxially disposed, second
Inlet opening 603 is being axially facing in swivel nut 6 along swivel nut 6 since the end end face of the outside for extending out to valve body 2 of swivel nut 6
The circular hole that portion extends to form.Swivel nut 6 includes the second connecting portion 601 for setting gradually and being connected in an axial direction and third interconnecting piece
602, second connecting portion 601 and third interconnecting piece 602 are cirque structure and second connecting portion 601 and third interconnecting piece 602
Coaxial arrangement, the interior diameter of second connecting portion 601 are more than the interior diameter of third interconnecting piece 602, and the length of third interconnecting piece 602 is big
In the length of second connecting portion 601, first connecting portion 501 is inserted into the inner chamber body of second connecting portion 601 and first connecting portion 501
Be is threadedly coupled with second connecting portion 601, the periphery of first connecting portion 501 equipped with external screw thread, second connecting portion 601 it is interior
Disc is equipped with internal thread.The overall diameter of second connecting portion 601 is identical as the diameter of valve chamber, and the one of third interconnecting piece 602
In partial insertion valve chamber and third interconnecting piece 602 is threadedly coupled with valve body 2, and the periphery of third interconnecting piece 602 is equipped with outer
Screw thread, another part of third interconnecting piece 602 extend out to the outside of valve body 2.The inner chamber body of third interconnecting piece 602 be second into
Fluid apertures 603, the second valve seat 4 is located in the inner chamber body of second connecting portion 601 and the overall diameter and second connecting portion of the second valve seat 4
601 interior diameter size is identical, and the second valve seat 4 is simultaneously clipped between valve pocket 5 and third interconnecting piece 602.
As shown in figs. 1,2 and 6, the second valve seat 4 is cirque structure and the second valve seat 4 and spool are coaxial arrangement,
It is to allow the centre bore of spool partial insertion at the center of second valve seat 4, the second inlet opening 603 of the centre bore and swivel nut 6 and leads
It is in connected state to the inner chamber body in portion 502 and centre bore and the second inlet opening 603 are coaxial, during the largest outer diameter of spool is more than
The diameter in heart hole.The centre bore of second liquid pass hole 504 and the second valve seat 4 is the part in second medium channel, when spool and the
When two valve seats 4 are in discrete state, the second liquid pass hole 504 is in the open state, and spool covers the first liquid pass hole 503, the first mistake
Fluid apertures 503 is closed, and the second inlet opening 603 passes through the centre bore of the second valve seat 4, the inner chamber body of guide part 502, second
Liquid pass hole 504 and valve chamber are connected to drainage hole 203, the second inlet opening 603, the centre bore of the second valve seat 4, guide part 502 it is interior
Cavity, the second liquid pass hole 504, valve chamber and drainage hole 203 form second medium channel, and second medium channel is on shape at this time
State, centre bore, the inner chamber body of guide part 502, second liquid pass hole 504 and of the liquid through the second valve seat 4 in the second inlet opening 603
Valve chamber flows to drainage hole 203, and final liquid flows out valve body 2.When spool and the second valve seat 4 are in contact condition, spool covers
Second liquid pass hole 504, the second liquid pass hole 504 are closed, and the second inlet opening 603 is not connected to drainage hole 203, and second is situated between
Matter channel is interrupted, and the first liquid pass hole 503 is in the open state, and first medium channel is in the conduction state at this time.
As shown in Figure 1, Figure 2 and shown in Fig. 5, spool have primary sealing area 701 for being contacted with the first valve seat 3 and be used for
The secondary sealing area 702 of second valve seat 4 contact.Primary sealing area 701 is located at the first sealed end of spool, secondary sealing area 702
Positioned at the second sealed end of spool, the ends on the first sealed end and the axial direction that the second sealed end is spool, first is close
Sealing end and the second sealed end are frustum structure, and the structure of spool is simpler, alternately the more compact structure of check valve entirety.First is close
Cover 701 and secondary sealing area 702 are circular conical surface and primary sealing area 701 is identical with the taper size of secondary sealing area 702,
Primary sealing area 701 and secondary sealing area 702 are coaxial arrangement and the axis of primary sealing area 701 and secondary sealing area 702 is
The axis of spool.First sealed end is used to be inserted into realize the break-make control in first medium channel in the centre bore of the first valve seat 3,
Second sealed end is for being inserted into the centre bore of the second valve seat 4 to realize that the break-make in second medium channel controls.First valve seat 3 has
It is useful for the first mating surface contacted with primary sealing area 701, the second valve seat 4 has for being contacted with secondary sealing area 702
Second mating surface, the first mating surface and the second mating surface are arc surface, and sealing effect is good.
As shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 6, spool 7 is the cylinder of one end open and inner hollow, the opening of spool 7
End is inserted into towards the second valve seat 4, resetting spring 8 in the inner chamber body of spool 7.Swivel nut 6 further includes being set to third interconnecting piece 602
Limiting section 604 in inner chamber body, limiting section 604 are less than the second inlet opening 603 for the interior diameter of cirque structure and limiting section 604
Diameter, limiting section 604 is fixedly connected with the inner headed face of third interconnecting piece 602, and limiting section 604 and third interconnecting piece 602 are coaxial
Setting, the second inlet opening 603 are connected to by the centre bore of limiting section 604 with the centre bore of the second valve seat 4.Resetting spring 8 is clipped in
Between limiting section 604 and spool 7, resetting spring 8 and the centre bore across the second valve seat 4.Resetting spring 8 is helical spring, limit
It is the court since the end face for facing spool 7 of limiting section 604 that position portion 604, which has the location hole for allowing resetting spring 8 to be inserted into, location hole,
One end of the circular hole formed to the internal stretch of limiting section 604, resetting spring 8 is inserted into the inner chamber body of spool 7, resetting spring 8
The other end be inserted into location hole, resetting spring 8 applies active force in an axial direction to spool 7, and spool 7 matches with limiting section 604
The positioning for realizing resetting spring 8 is closed, there are gap, resetting springs 8 between the inner headed face of valve pocket 5 radially for resetting spring 8
It is not easy stuck or flexural deformation, improves reliability.
The present invention is exemplarily described above in association with attached drawing.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress；Or not
It is improved, the above-mentioned design of the present invention and technical solution are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (10)
1. replacing check valve, including valve body and core assembly, it is characterised in that：The core assembly includes connecting for screw thread with valve body
The swivel nut that connects, be with swivel nut the valve pocket being threadedly coupled, the first valve seat being connect with valve pocket, the second valve seat inside swivel nut and
Spool inside valve pocket and to be movably arranged, spool is between the first valve seat and the second valve seat.
2. alternately check valve according to claim 1, it is characterised in that：The valve pocket be sheathed on first valve seat and
First valve seat is connect by screw with valve pocket, and valve pocket has the internal thread hole for allowing screw to be inserted into, and the first valve seat, which has, allows screw to insert
The lock groove entered.
3. alternately check valve according to claim 2, it is characterised in that：The lock groove is in the outer of first valve seat
The annular groove that disc upper edge entirely circumferentially extends, it is to be uniformly distributed circumferentially that multiple and multiple screws, which are arranged, in the screw.
4. alternately check valve according to any one of claims 1 to 3, it is characterised in that：First valve seat and the valve pocket
One end connection, second valve seat contact with the other end face of valve pocket and the second valve seat by valve pocket and the swivel nut clamping.
5. alternately check valve according to claim 4, it is characterised in that：The spool have for first valve seat
The primary sealing area of contact and secondary sealing area for being contacted with second valve seat.
6. alternately check valve according to claim 5, it is characterised in that：The primary sealing area and the secondary sealing area
It is circular conical surface.
7. alternately check valve according to any one of claims 1 to 6, it is characterised in that：The valve pocket, which has, allows liquid to pass through
The first liquid pass hole and the second liquid pass hole, the valve body has a drainage hole for allowing liquid to flow out, drainage hole and the first liquid pass hole and
Second liquid pass hole is connected to.
8. alternately check valve according to claim 7, it is characterised in that：In the axial direction of the core assembly, described
For one liquid pass hole between second liquid pass hole and first valve seat, the second liquid pass hole is located at the first liquid pass hole and described
Between two valve seats, the distance between the first liquid pass hole and the second liquid pass hole be less than between the first liquid pass hole and the first valve seat away from
From the distance between the first liquid pass hole and the second liquid pass hole are less than the distance between the second liquid pass hole and the second valve seat.
9. alternately check valve according to claim 7 or 8, it is characterised in that：The axis of the drainage hole is located at described the
Between the axis of one liquid pass hole and the axis of second liquid pass hole.
10. according to any alternating check valve of claim 7 to 9, it is characterised in that：First liquid pass hole is in the valve
It puts on and multiple and all first liquid pass holes is set to be uniformly distributed circumferentially on valve pocket, second liquid pass hole is in the valve pocket
It is upper that multiple and all second liquid pass holes are set to be uniformly distributed circumferentially on valve pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492017.1A CN108561168A (en) | 2018-05-22 | 2018-05-22 | Alternately check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492017.1A CN108561168A (en) | 2018-05-22 | 2018-05-22 | Alternately check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108561168A true CN108561168A (en) | 2018-09-21 |
Family
ID=63539444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810492017.1A Withdrawn CN108561168A (en) | 2018-05-22 | 2018-05-22 | Alternately check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108561168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056385A (en) * | 2019-06-04 | 2019-07-26 | 巨隆集团芜湖兴隆液压有限公司 | Core assembly and reversal valve with it |
-
2018
- 2018-05-22 CN CN201810492017.1A patent/CN108561168A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056385A (en) * | 2019-06-04 | 2019-07-26 | 巨隆集团芜湖兴隆液压有限公司 | Core assembly and reversal valve with it |
| CN110056385B (en) * | 2019-06-04 | 2024-03-22 | 巨隆集团芜湖兴隆液压有限公司 | Valve core assembly and reversing valve with same |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180921 |
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| WW01 | Invention patent application withdrawn after publication |