CN107842381A - Automatic unloading hydraulic control one-way valve - Google Patents

Automatic unloading hydraulic control one-way valve Download PDF

Info

Publication number
CN107842381A
CN107842381A CN201711016808.9A CN201711016808A CN107842381A CN 107842381 A CN107842381 A CN 107842381A CN 201711016808 A CN201711016808 A CN 201711016808A CN 107842381 A CN107842381 A CN 107842381A
Authority
CN
China
Prior art keywords
valve
hole
core
big
pocket
Prior art date
Application number
CN201711016808.9A
Other languages
Chinese (zh)
Inventor
李子昂
李福洪
朱述群
谢瑞
范德伟
Original Assignee
鸿大智能机械有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 鸿大智能机械有限公司 filed Critical 鸿大智能机械有限公司
Priority to CN201711016808.9A priority Critical patent/CN107842381A/en
Publication of CN107842381A publication Critical patent/CN107842381A/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50Component parts or details of props
    • E21D15/51Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512Arrangement of valves
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices

Abstract

The invention discloses a kind of automatic unloading hydraulic control one-way valve, including valve body, swivel nut, feed liquor set, valve seat, valve pocket, the big valve core being arranged inside valve pocket, the small valve core being arranged inside big valve core, movably it is arranged inside the valve pocket and the differential valve element for controlling the big valve core to move and the pressure regulating device for applying elastic acting force to differential valve element.The automatic unloading hydraulic control one-way valve of the present invention, by setting differential valve element and pressure regulating device to be engaged, it is possible to achieve the automatically unloading of check valve, and the operating pressure of check valve is adjusted, check valve is can adapt to the job requirement of different pressures, improve the versatility of check valve.

Description

Automatic unloading hydraulic control one-way valve

Technical field

The present invention relates to the Hydraulic Elements in coal mine hydraulic supporting hydraulic circuit, specifically, the present invention relates to it is a kind of from Dynamic unloading hydraulic control one-way valve.

Background technology

At present, hydraulic control one-way valve can only be realized to associated oil cylinder or column used in coal mine fully-mechanized mining hydraulic support The single-chamber feed liquor locking of jack and time liquid release.When pressure is increased beyond the operating pressure setting value of hydraulic control one-way valve, only External overflow valve (i.e. safety valve) release can be relied on, the liquid of outflow is discharged to outside hydraulic system, both pollutes underground environment, make again Into waste.And the operating pressure of existing hydraulic control one-way valve is unadjustable, it is impossible to the job requirement of different pressures is adapted to, it is general Property is poor.

The content of the invention

It is contemplated that at least solves one of technical problem present in prior art.Therefore, the present invention provides one kind certainly Dynamic unloading hydraulic control one-way valve, it is therefore an objective to realize automatically unloading.

To achieve these goals, the technical scheme taken of the present invention is:Automatic unloading hydraulic control one-way valve, including valve body, It is swivel nut, feed liquor set, valve seat, valve pocket, the big valve core being arranged inside valve pocket, the small valve core being arranged inside big valve core, removable Be arranged inside the valve pocket and for the differential valve element for controlling the big valve core to move and for being applied to differential valve element Add the pressure regulating device of elastic acting force.

The valve pocket have allow liquid by and flow liquid into inside valve pocket with promote that the differential valve element moves the One liquid pass hole, differential valve element drive the big valve core to be directed away from the direction of valve seat and moved while movement.

The differential valve element, which has, allows the second liquid pass hole that liquid connects by and with first liquid pass hole, the valve pocket It is arranged with liquid is allowed on valve pocket by and with the second liquid pass hole connects and the 3rd liquid pass hole of liquid outflow that allows inside valve pocket Have for controlling the opening and closing of the 3rd liquid pass hole and distending and the chokes set shunk can be carried out.

The big valve core is sheathed on the differential valve element, and link gear is provided between big valve core and differential valve element, differential Valve element and small valve core are provided with spring, and link gear is arranged to enable differential valve element to drive big valve core to be directed away from institute in release State the direction movement of valve seat.

The big valve core has the mounting hole for allowing the link gear to be embedded in, and the differential valve element, which has, makes link gear embedding The chute entered, link gear include the sliding part in insertion mounting hole and chute and are arranged in mounting hole and play limit to sliding part The locating part of position effect, sliding part are spherical, and for locating part with big valve core to be threadedly coupled, mounting hole is internal thread hole.

The swivel nut is connected by screw and feed liquor set, and feed liquor set is with the internal thread hole for allowing screw to insert, swivel nut With the lock groove for allowing screw to insert, for feed liquor set with the valve pocket to be threadedly coupled, swivel nut is to be threadedly coupled with the valve body.

The lock groove is to be set on the periphery of the swivel nut along the annular groove entirely circumferentially extended, the screw Multiple and multiple screws are to be uniformly distributed circumferentially.

The pressure regulating device includes pressure-regulating sleeve, the moveable spring for being arranged at pressure-regulating sleeve inside and being contacted with differential valve element Seat, it is arranged inside pressure-regulating sleeve and is the voltage regulation screw being threadedly coupled with pressure-regulating sleeve, is arranged between voltage regulation screw and spring base Pressure spring and the unidirectional damping mechanism that is arranged inside the spring base, the valve pocket have allow spring base to pass through to lead Xiang Kong.

The unidirectional damping mechanism includes nonreturn valve core, screw plug and the reset bullet being arranged between nonreturn valve core and screw plug Spring, the inside of the spring base are provided with the valve pocket for accommodating nonreturn valve core and screw plug, air admission hole and make the hollow interior of the valve pocket The intercommunicating pore that chamber connects with air admission hole, the diameter of air admission hole are less than the diameter of valve pocket and nonreturn valve core.

For the screw plug with the spring base to be threadedly coupled, screw plug, which has, connects the hollow cavity of the valve pocket and pressure-regulating sleeve Logical through hole.

The automatic unloading hydraulic control one-way valve of the present invention, by setting differential valve element and pressure regulating device to be engaged, it is possible to achieve The automatically unloading of check valve, and the operating pressure of check valve is adjusted, check valve is can adapt to the work of different pressures It is required, improves the versatility of check valve.

Brief description of the drawings

This specification includes the following drawings, and shown content is respectively:

Fig. 1 is the sectional view of automatic unloading hydraulic control one-way valve of the invention;

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 feed liquor set;

Fig. 5 is the sectional view of valve rod;

Fig. 6 is the sectional view of valve pocket;

Fig. 7 is the sectional view of swivel nut;

Fig. 8 is the sectional view of big valve core;

Fig. 9 is the sectional view of small valve core;

Figure 10 is the sectional view of differential valve element;

Figure 11 is the sectional view of chokes set;

Figure 12 is the sectional view of spring base;

Figure 13 is the sectional view of pressure-regulating sleeve;

Figure 14 is the use state diagram of hydraulic control one-way valve of the present invention;

In figure mark for:

1st, screw;

2nd, valve body;201st, valve pocket;202nd, the first opening;203rd, the second opening;204th, the 3rd opening;205th, the 4th opening; 206th, the 5th opening;207th, the 6th opening;208th, the 7th opening;209th, the 8th opening;

3rd, feed liquor set;301st, the 6th liquid pass hole;302nd, internal thread hole;303rd, the first accommodating cavity;304th, the second accommodating cavity; 305th, the 3rd accommodating cavity;306th, the 4th accommodating cavity;307th, the 5th accommodating cavity;

4th, valve pocket;401st, the 3rd liquid pass hole;402nd, the 4th liquid pass hole;403rd, big footpath chamber;404th, path chamber;405th, it is oriented to Hole;406th, storage tank;407th, connecting portion;408th, the first guide part;409th, the second guide part;410th, flange;411st, first liquid is crossed Hole;

5th, swivel nut;501st, the 5th liquid pass hole;502nd, the first working hole;503rd, the 6th accommodating cavity;504th, lock groove;

6th, push rod;601st, push rod body;602nd, piston;

7th, differential valve element;701st, the second liquid pass hole;702nd, chute;703rd, support sector;704th, feed liquor portion;705th, admission chamber;

8th, spring base;801st, limiting section;802nd, first boss;803rd, second boss;804th, intercommunicating pore;805th, air admission hole; 806th, valve pocket;

9th, big valve core;901st, mounting hole;902nd, hollow cavity;

10th, small valve core;11st, valve seat;12nd, the first spring;13rd, second spring;14th, nonreturn valve core;15th, back-moving spring;16、 Screw plug;17th, pressure-regulating sleeve;18th, pressure spring;19th, voltage regulation screw;20th, chokes set;21st, sliding part;22nd, locating part;23rd, cutting Sealing;24th, air storing cavity.

Embodiment

Below against accompanying drawing, by the description to embodiment, embodiment of the invention is made further details of Explanation, it is therefore an objective to help those skilled in the art to have more complete, accurate and deep reason to design of the invention, technical scheme Solution, and contribute to its implementation.

As shown in figure 1 to figure 13, the invention provides a kind of automatic unloading hydraulic control one-way valve, including valve body 2, push rod, spiral shell Set 5, feed liquor set 3, valve seat 11, valve pocket 4, the first spring 12, second spring 13, the big valve core 9 being arranged inside valve pocket 4, setting Small valve core 10 inside big valve core 9, moveable it is arranged at the inside of valve pocket 4 and the difference for controlling big valve core 9 to move Movable valve plug 7 and the pressure regulating device for applying elastic acting force to differential valve element 7.

Specifically, as depicted in figs. 1 and 2, valve pocket 4, big valve core 9, small valve core 10, feed liquor set 3, swivel nut 5, valve seat 11, Differential valve element 7, the first spring 12 and second spring 13 etc. form the core assembly of plug-in, and core assembly is structure as a whole.Enter Liquid set 3 is between swivel nut 5 and valve pocket 4, and valve seat 11 is arranged at the inside of feed liquor set 3 and valve seat 11 is engaged reality with big valve core 9 Now seal, big valve core 9 has the sealing surface for being used for being in contact with valve seat 11 and the sealing surface is circular conical surface.Swivel nut 5 and feed liquor set 3 It is sheathed on push rod, big valve core 9 and differential valve element 7 are the inside for being movably arranged at valve pocket 4, and small valve core 10 is moveable The inside of big valve core 9 is arranged at, push rod is used to apply big valve core 9 and small valve core 10 pressure vertically, and push rod can promote The inside of big valve core 9 towards valve pocket 4 is mobile and promotes small valve core 10 in the inside of big valve core 9 towards close to the side of differential valve element 7 To moving, big valve core 9 is separated with valve seat 11, realize the unlatching of check valve.Swivel nut 5 is to be threadedly coupled with valve body 2, feed liquor Set 3 is clipped between swivel nut 5 and valve pocket 4 and feed liquor set 3 is fixedly connected with swivel nut 5 and valve pocket 4, and valve pocket 4 is used in the axial direction to big Valve element 9 and differential valve element 7 play position-limiting action, and swivel nut 5 is used to play position-limiting action to push rod in the axial direction, and swivel nut 5 and valve body 2 are used in combination It is connected in the upright post jack with outside.Upright post jack is a kind of single-piston-rod hydraulic cylinder, upright post jack can extend and Shrink.When upright post jack is extended, to carry out setting prop action.When upright post jack is shunk, drop post action.

As shown in Figure 1 to Figure 3, the inside of valve body 2 has the valve pocket 201 for accommodating core assembly, and valve pocket 201 is in valve body 2 One end end face extend the circular cavity to be formed initially towards the inside of valve body 2, core assembly is integrally inserted in the valve pocket of valve body 2 And swivel nut 5 is to be threadedly coupled with valve body 2, realizes fixation of the core assembly on valve body 2.Valve pocket is on one end end face of valve body 2 Form an opening and set the opening as the first opening 202, core assembly is inserted in valve pocket at the first opening 202, valve element group To be threadedly coupled in part insertion valve pocket and with valve body 2, core assembly is arranged to be threadedly coupled with valve body 2, easy disassembly and maintenance. Valve body 2 is provided with the second opening 203, and the second opening 203 is in the axial direction of valve pocket and the second opening 203 connects with valve pocket, the One opening 202 and the second opening 203 are to be oppositely arranged.It is fixedly connected in the opening 203 of pressure regulating device insertion second and with valve body 2, Pressure regulating device simultaneously closes second opening 203.

As shown in figures 1 and 3, valve body 2 is rectangular block shape structure, and valve body 2 has first end face, second end face, the 3rd end Face, the 4th end face, the 5th end face and the 6th end face, first end face and second end face are the both ends end on the length direction of valve body 2 Face, first end face and second end face are parallel and perpendicular with the length direction of valve body 2, and the first opening 202 is arranged at first end On face, the second opening 203 is arranged in second end face.3rd end face and the 4th end face are the both ends on the width of valve body 2 End face, the 3rd end face and the 4th end face are parallel and perpendicular with the width of valve body 2, and the 5th end face and the 6th end face are valve Both ends end face on the thickness direction of body 2, the 5th end face and the 6th end face are parallel and perpendicular with the thickness direction of valve body 2. Valve body 2 is provided with one first 204, one the 4th openings 205, one of opening of opening 203, one the 3rd of opening 202, one second The individual opening 208 of opening 207, one the 7th of 5th opening 206, one the 6th and one the 8th opening 209, the second opening 203 are made For the second working hole A, for the 3rd opening 204 as the 3rd working hole PA for allowing liquid to pass through, the 4th opening 205, which is used as, allows liquid to lead to The 4th working hole PA ' crossed, the 5th opening 206 are used as the 5th working hole A1 for allowing liquid to pass through, and the conducts of the 6th opening 207 allow liquid The 6th working hole A2 that body passes through, the 7th opening 208 is as the 7th working hole PB for allowing liquid to pass through, the 8th 209 conducts of opening Allow the 8th working hole PB ' that liquid passes through, swivel nut 5 allows the first working hole B that liquid passes through provided with one, and swivel nut 5 is It is connected at one working hole B by oil pipe with the upright post jack of outside.Valve body 2 passes through oil pipe and outside at the 5th opening 206 Upright post jack connection, into the liquid in valve pocket by the 5th opening 206 flow into upright post jacks in, in upright post jack Liquid pass through the 5th opening 206 flow into valve pockets in.

As shown in Fig. 1, Fig. 3 and Fig. 9, the 3rd 204 (i.e. the 3rd working hole PA) of opening and the 7th 208 (i.e. the 7th works of opening Make mouth PB) it is used to be connected with the three position four-way directional control valve of outside, 206 (i.e. the 5th working holes of opening of the first working hole B and the 5th A1) it is used to be connected with the upright post jack of outside.4th 205 (i.e. the 4th working hole PA) of opening and the 8th are open 209 (i.e. the Eight working hole PB) it can be used for the hydraulic control one-way valve of adjoining frame, the 4th opening 205 is opened with the 3rd of the hydraulic control one-way valve of adjacent frame Mouth 204 is connected, and the 8th opening 209 is connected with the 7th opening 208 of the hydraulic control one-way valve of adjacent frame, i.e., when two hydraulic control one-way valve phases Connection is in use, the 4th opening 205 of one of hydraulic control one-way valve connects with the 3rd opening 204 of another hydraulic control one-way valve Connect, the 8th opening 209 of one of hydraulic control one-way valve is connected with the 7th opening 208 of another hydraulic control one-way valve.6th opens 207 (i.e. the 6th working hole A2) of mouth can be used for being connected what is required to meet other with the pressure gauge of outside or pressure sensor Need, the 6th opening 207 can also use chock to be blocked when need not using, and the 6th opening 207 can be closed, and seal Closing rear fluid can not pass through.

As shown in figures 1 and 3, the opening 206 of the 3rd opening the 204, the 5th and the 7th opening 208 are from the 3rd end of valve body 2 The axis phase of the circular hole that face extends initially towards the inside of valve body 2, the opening 206 of the 3rd opening the 204, the 5th and the 7th opening 208 The axis perpendicular of valve pocket 201 parallel and with valve body 2, the opening 206 of the 3rd opening the 204, the 5th and the 7th opening 208 and and valve Chamber 201 is connected, and the opening 206 of the 3rd opening the 204, the 5th and the 7th opening 208 are in parallel with the length direction of valve body 2 On same straight line and the 3rd opening 204 and positioned at the 5th opening 206 and the 7th opening 208 between.4th opening the 205, the 6th is opened The opening 209 of mouth 207 and the 8th is the circular holes extended from the 4th end face of valve body 2 initially towards the inside of valve body 2, and the 4th is open 205th, the axis of the 6th opening 207 and the 8th opening 209 is parallel and the axis perpendicular of valve pocket 201 with valve body 2, and the 4th opens The opening 209 of the opening of mouth the 205, the 6th 207 and the 8th is connected with valve pocket 201, and the opening 207 and the 8th of the 4th opening the 205, the 6th is opened Mouthfuls 209 on the same straight line parallel with the width of valve body 2 and the 4th opening 205 is positioned at the 8th opening 209 and the Between six openings 207, the 3rd opening 204 and the 4th opening 205 are in the same straight line parallel with the width of valve body 2 On, the 5th opening 206 and the 6th opening 207 are on the same straight line parallel with the width of valve body 2, the 7th opening 208 and the 8th are open 209 on the same straight line parallel with the width of valve body 2.Second opening 203 is from valve body 2 The circular hole that extends initially towards the inside of valve body 2 of second end face, the first opening 202 is arranged in the first end face of valve body 2, the One opening 202, second opening 203 and valve pocket 201 for be coaxially disposed and valve pocket 201 positioned at first opening 202 and second opening 203 Between.

As shown in Figure 1 to Figure 3, after in core assembly insertion valve pocket 201, the second opening 203 is located at the axial direction of core assembly On, closed in the opening 203 of pressure regulating device insertion second and by the second opening 203.3rd opening 204 and the 4th opening 205 are located at Feed liquor set 3 radially and the 3rd opening 204 and the 4th opening 205 respectively positioned at feed liquor set 3 side and the 3rd opening 204 Hes 4th opening 205 connect with the inner chamber of feed liquor set 3, the 5th opening 206 and the 6th be open 207 be located at valve pocket 4 radially and the Five openings 206 and the 6th opening 207 are located at the side of valve pocket 4 respectively, and the 7th opening 208 and the 8th opening 209 are positioned at swivel nut 5 Radially and the 7th opening 208 and the 8th opening 209 are respectively positioned at the side of swivel nut 5 and the 7th opening 208 and the 8th opening 209 Connected with the inner chamber of swivel nut 5.

As depicted in figs. 1 and 2, valve seat 11 is arranged at the inside of feed liquor set 3, and valve seat 11 is in the axial direction by feed liquor set 3 and valve Set 4 is fixedly clamped.Valve seat 11 is cirque structure and valve seat 11 and feed liquor set 3 and valve pocket 4 are to be coaxially disposed, the inside of valve seat 11 There is the centre bore for accommodating big valve core 9, the diameter of the centre bore of valve seat 11 is less than the overall diameter of big valve core 9 at center.Big valve core 9 It is made with valve seat 11 of metal material, big valve core 9 is identical with the material of valve seat 11, and the hardness of valve seat 11 is less than big valve core 9 Hardness, big valve core 9 and valve seat 11 be tightly connected to be hard, enhances sealing property.Big valve core 9 and valve seat 11 use metal material It is made, and uses 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 resistance to super-pressure, the service life length of hydraulic control one-way valve.The sealed end of big valve core 9 is frustum structure, big valve The sealing surface of core 9 is circular conical surface, and the sealed end of big valve core 9 can stretch into the centre bore of valve seat 11 and the realization that is in contact with valve seat 11 Sealing, push rod only start to contact with big valve core 9 at valve seat 11, and the structure of big valve core 9 is simpler, the overall knot of hydraulic control one-way valve Structure is more compact.In addition, small valve core 10 is also made of metal material, valve seat 11, big valve core 9 are identical with the material of small valve core 10.

As shown in Figure 1, Figure 2 with shown in Fig. 5, push rod is the inside for being movably arranged at swivel nut 5 and feed liquor set 3, and push rod includes The piston 602 and push rod body 601 being fixedly and coaxially connected, piston 602 and push rod body 601 are cylinder, the diameter of piston 602 More than the diameter of push rod body 601, push rod body 601 is used to contact with big valve core 9 and small valve core 10, with when check valve is opened Big valve core 9 and small valve core 10 is promoted to be moved linearly towards the direction close to differential valve element 7.Piston 602 is located at the interior of swivel nut 5 Portion, swivel nut 5 and feed liquor set 3 are engaged, for playing position-limiting action to piston 602 in the axial direction.Push rod body 601 inserts feed liquor The inside of set 3 and swivel nut 5, the diameter of the centre bore of valve seat 11 are more than the diameter of push rod body 601 so that the energy of push rod body 601 Enough insert in the centre bore of valve seat 11, to be contacted with big valve core 9 and small valve core 10.Second spring 13, which is used to apply push rod, makes it The active force moved axially towards the direction away from big valve core 9 and small valve core 10, second spring 13 are sheathed on push rod sheet On body 601 and second spring 13 is clipped between piston 602 and feed liquor set 3, and one end of second spring 13 is against the inwall of feed liquor set 3 On, the other end is against on piston 602, and second spring 13 is cylindrically coiled spring.

As shown in Figure 1, Figure 2 and Figure 4, feed liquor set 3 is both ends open and the cylinder of inner hollow, and one end of swivel nut 5 is inserted Enter during feed liquor covers 3 and be fixedly connected with feed liquor set 3, in the other end insertion valve pocket 4 of feed liquor set 3 and feed liquor set 3 and valve pocket 4 are spiral shell Line connects, and the end of feed liquor set 3 is provided with external screw thread, and the end of valve pocket 4 is provided with internal thread.Feed liquor set 3, which is provided with, allows liquid to pass through The 6th liquid pass hole 301, the 6th liquid pass hole 301 on feed liquor set 3 to be obliquely installed, the axis and feed liquor of the 6th liquid pass hole 301 There is angle between the axis of set 3 and the angle is acute angle.6th liquid pass hole 301 is through setting in the side wall of feed liquor set 3 Circular hole, the 6th liquid pass hole 301 is evenly distributed multiple, the 6th liquid pass hole 301 and feed liquor set 3 in the side wall of feed liquor set 3 Hollow cavity connect and all 6th liquid pass holes 301 be distributed in around hollow cavity, the 6th liquid pass hole 301 and with valve body 2 The 3rd opening 204 205 be connected with the 4th opening.6th liquid pass hole 301 is the valve towards outside in the side wall of feed liquor set 3 11 positions of seat tilt extension, and the axis that the axis of the 6th liquid pass hole 301 and feed liquor cover 3 intersects and angle between the two is small In 90 degree.6th liquid pass hole 301 is designed using inclined hole so that liquid is more smooth by being flowed during six liquid pass holes 301, resistance damage Mistake is smaller, and is easier to process.

As shown in Figure 1, Figure 2 and Figure 4, the inside of feed liquor set 3, which is provided with, accommodates the first accommodating cavity 303 of swivel nut 5, accommodates second Second accommodating cavity 304 of spring 13 and push rod body 601, the 3rd accommodating cavity 305 and the 4th accommodating cavity for accommodating push rod body 601 306 and the 5th accommodating cavity 307 of valve seat 11 is accommodated, the first accommodating cavity 303, the second accommodating cavity 304, the 3rd accommodating cavity 305, the Four accommodating cavities 306 and the 5th accommodating cavity 307 are to be sequentially arranged along the axial direction of feed liquor set 3, the first accommodating cavity 303, the second accommodating cavity 304th, the 3rd accommodating cavity 305, the 4th accommodating cavity 306 and the 5th accommodating cavity 307 are circular cavity and the first accommodating cavity 303, second Accommodating cavity 304, the 3rd accommodating cavity 305, the 4th accommodating cavity 306 and the 5th accommodating cavity 307 is are coaxially disposed, the first accommodating cavity 303 Diameter be more than the diameter of the second accommodating cavity 304, the diameter of the second accommodating cavity 304 is more than the diameter of the 3rd accommodating cavity 305, the 4th The diameter of accommodating cavity 306 is more than the diameter of the 3rd accommodating cavity 305, and the diameter of the 5th accommodating cavity 307 is more than the 4th accommodating cavity 306 Diameter, the diameter of the 3rd accommodating cavity 305 is equal with the diameter of push rod body 601, and swivel nut 5 is inserted in the first accommodating cavity 303 And be fixedly connected with feed liquor set 3, the diameter of the second accommodating cavity 304 is less than the diameter of piston 602 so that piston 602 is only capable of in spiral shell The inside of set 5 moves.First accommodating cavity 303, the second accommodating cavity 304, the 3rd accommodating cavity 305, the 4th accommodating cavity 306 and Five accommodating cavities 307 form the hollow cavity of feed liquor set 3, and the first accommodating cavity 303 and the 5th accommodating cavity 307 are respectively in feed liquor set 3 Opening is formed on the end face of both ends, the overall diameter of valve seat 11 is equal with the diameter of the 5th accommodating cavity 307, and valve seat 11 is placed in the 5th In accommodating cavity 307 and valve seat 11 is engaged with feed liquor set 3 by valve pocket 4 and is fixedly clamped.The of 6th liquid pass hole 301 and feed liquor set 3 Four accommodating cavities 306 are connected, and all 6th liquid pass holes 301 are distributed in around the 4th accommodating cavity 306, the 4th accommodating cavity 306 And connected with the centre bore of valve seat 11.

As shown in Figure 1, Figure 2 and Figure 7, swivel nut 5 is both ends open and the cylinder of inner hollow, and swivel nut 5 is inserted in valve body 2 And with valve body 2 to be threadedly coupled, swivel nut 5 is provided with external screw thread, and the inner headed face of the valve pocket of valve body 2 is provided with internal thread.Swivel nut 5 is used It is connected, is flowed into the fluid in hydraulic control one-way valve by swivel nut 5 in upright post jack, column in the upright post jack with outside Fluid in jack can be also flowed into hydraulic control one-way valve by swivel nut 5.One end of swivel nut 5 is located in the valve pocket of valve body 2, swivel nut 5 other end extend out to the outside of valve body 2, is easy to be connected with upright post jack by oil pipe.The inside of swivel nut 5 is provided with the first work Make mouth 502 (i.e. the first working hole B) and accommodate the 6th accommodating cavity 503 of valve rod, the first working hole 502 is the stretching from swivel nut 5 The end face at end starts the circular hole extended along the inside for being axially facing swivel nut 5 of swivel nut 5, one end of swivel nut 5 for external part and this stretch Go out end to insert in the valve pocket of valve body 2 for insertion end and the insertion end positioned at the outside of valve body 2, the other end of swivel nut 5.6th is accommodating The diameter of chamber 503 is identical with the overall diameter size of piston 602, and the diameter of the first working hole 502 is less than the straight of the 6th accommodating cavity 503 Footpath, the first working hole 502 connect with the 6th accommodating cavity 503.6th accommodating cavity 503 is the circular cavity for the inside for being arranged at swivel nut 5 Body, the 6th accommodating cavity 503 prolong for the inside for being axially facing feed liquor set 3 along feed liquor set 3 since the end face of the insertion end of swivel nut 5 The cavity to be formed is stretched, the 6th accommodating cavity 503 and the first working hole 502 are coaxial.The 5th mistake for allowing liquid to pass through is additionally provided with swivel nut 5 Fluid apertures 501, the 5th liquid pass hole 501 is to be obliquely installed on swivel nut 5, between the axis of the 5th liquid pass hole 501 and the axis of swivel nut 5 It is acute angle with angle and the angle.For 5th liquid pass hole 501 to run through the circular hole set in the side wall of swivel nut 5, the 5th crosses liquid Hole 501 sets multiple and multiple 5th liquid pass holes 501 to be uniformly distributed circumferentially in the side wall of swivel nut 5, and multiple five cross liquid Hole 501 is distributed in the surrounding of the first working hole 502 and the first working hole 502 is connected with the 5th liquid pass hole 501, the 5th liquid pass hole 501 and 209 it is connected with the 7th opening 208 on valve body 2 and the 8th opening.Interior of 5th liquid pass hole 501 in swivel nut 5 Extension is tilted, the axis of the 5th liquid pass hole 501 intersects with the axis of swivel nut 5 and angle between the two is less than 90 degree.5th mistake Fluid apertures 501 is designed using inclined hole so that liquid is more smooth by being flowed during five liquid pass holes 501, and drag losses is smaller, Er Qiegeng It is easily worked.There is angle between the axis of the 6th liquid pass hole 301 and the axis of the 5th liquid pass hole 501 on same axial direction And the angle is also acute angle, the 501 V-shaped arrangement of axis and the 5th liquid pass hole of the 6th liquid pass hole 301 on same axial direction.

As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 7, swivel nut 5 is connected by screw 1 with feed liquor set 3, and swivel nut 5 covers 3 relative to feed liquor It can be rotated around its axis, feed liquor set 3 has the internal thread hole 302 for allowing screw 1 to insert, and swivel nut 5, which has, allows screw 1 to insert Lock groove 504, for feed liquor set 3 with valve pocket 4 to be threadedly coupled, swivel nut 5 is to be threadedly coupled with valve body 2.Compared to prior art Feed liquor set 3 in hydraulic control one-way valve is connected through a screw thread with swivel nut 5, and feed liquor set 3 and spiral shell in the hydraulic control one-way valve of the present invention Set 5 is linked into an integrated entity structure by screw 1, when avoiding the core assembly from dismounting because being threadedly coupled between feed liquor set 3 and swivel nut 5 and Loosen, cause feed liquor set 3 to be split away off from swivel nut 5, linked into an integrated entity by the feed liquor of screw 1 set 3 with swivel nut 5, Be not in the problem of coming off, when improving the reliability connected between feed liquor set 3 and swivel nut 5, and improving core assembly dismounting Operating efficiency.

As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 7, as preferable, lock groove 504 is along whole on the periphery of swivel nut 5 The annular groove of circumferentially extending, screw 1 set multiple and multiple screws 1 to be uniformly distributed circumferentially, the quantity of internal thread hole 302 Identical with the quantity of screw 1, each screw 1 is respectively embedded into an internal thread hole 302, the axis and feed liquor of internal thread hole 302 The axis perpendicular of set 3, all internal thread holes 302 are distributed in the surrounding of the first accommodating cavity 303, internal thread hole 302 and to enter The through hole of setting is extended radially through in the side wall of liquid set 3.Lock groove 504 is arranged at the end of the first accommodating cavity of insertion 303 of swivel nut 5 On the periphery in portion, all screws 1 are distributed in the surrounding of lock groove 504, and a part for screw 1 is inserted in internal thread hole 302, spiral shell In another part insertion lock groove 504 of nail 1, so as to which screw 1 can play position-limiting action to swivel nut 5 in the axial direction so that enter Liquid set 3 links into an integrated entity with swivel nut 5, while screw 1 can also circumferentially enter line slip in lock groove 504 so that the energy of swivel nut 5 It is enough to be rotated relative to feed liquor set 3, can when dismantling when in the valve pocket that core assembly is arranged on valve body 2 or from valve pocket Rotation swivel nut 5 and make in the rotary course of swivel nut 5 feed liquor set 3 remain to swivel nut 5 keep connection status, feed liquor set 3 with swivel nut 5 it Between will not separate.And due to being provided with the O-ring seal of quality of rubber materials between feed liquor set 3 and valve body 2, sealing ring be clipped in into Between liquid set 3 and the internal face of valve body 2, frictional force be present between sealing ring and feed liquor set 3 and valve body 2, it is so relative in swivel nut 5 When valve body 2 rotates, the presence of sealing ring cause it is relatively unrotatable between feed liquor set 3 and valve pocket 4 and valve body 2, and then also It can avoid relatively rotating between feed liquor set 3 and valve pocket 4, avoid feed liquor set 3 and valve pocket 4 from separating.

As shown in Figure 1, Figure 2 with shown in Fig. 6, valve pocket 4 is provided with and allows the 4th liquid pass hole 402 that liquid passes through, the 4th liquid pass hole 402 There is angle to be obliquely installed on valve pocket 4, between the axis of the 4th liquid pass hole 402 and the axis of valve pocket 4 and the angle is sharp Angle.4th liquid pass hole 402 is, through the circular hole set, the 4th liquid pass hole 402 sets multiple and multiple the in the side wall of valve pocket 4 For four liquid pass holes 402 to be uniformly distributed circumferentially in the side wall of valve pocket 4, multiple 4th liquid pass holes 402 are distributed in the four of big valve core 9 All and the 4th liquid pass hole 402 can connect with the hollow cavity of valve pocket 4, and the 4th liquid pass hole 402 is simultaneously open with the 5th on valve body 2 206 are connected with the 6th opening 207.4th liquid pass hole 402 tilts extension in the interior of valve pocket 4, the 4th liquid pass hole 402 Axis intersects with the axis of valve pocket 4 and angle between the two is less than 90 degree.4th liquid pass hole 402 is designed using inclined hole so that Liquid is more smooth by being flowed during four liquid pass holes 402, and drag losses is smaller, and is easier to process.On same axial direction The axis of the 6th liquid pass hole 301 and the axis of the 4th liquid pass hole 402 between there is angle and the angle to be also acute angle, in same The 402 V-shaped arrangement of axis and the 4th liquid pass hole of the 6th liquid pass hole 301 on one axial direction.

As shown in Figure 1, Figure 2 with shown in Fig. 6, valve pocket 4 is both ends open and the cylinder of inner hollow, and valve pocket 4 includes and feed liquor The connecting portions 407 of the connection of set 3, for the first guide part 408 for being play the guiding role to big valve core 9 and for being risen to differential valve element 7 Second guide part 409 of guide effect, connecting portion 407, the first guide part 408 and the second guide part 409 are along the axial direction of valve pocket 4 Set gradually and be fixedly connected sequentially, i.e., valve pocket 4 is connected by connecting portion 407, the first guide part 408 and the second guide part 409 Form, connecting portion 407, the first guide part 408 and the second guide part 409 are cirque structure, and connecting portion 407, first is oriented to For the guide part 409 of portion 408 and second to be coaxially disposed, the overall diameter of connecting portion 407 is more than the overall diameter of the first guide part 408, even The interior diameter of socket part 407 is more than the interior diameter of the first guide part 408.In the centre bore of the insertion connecting portion 407 of feed liquor set 3 and with connecting Socket part 407 is threaded connection, and the internal face of connecting portion 407 is provided with internal thread, and the interior diameter of connecting portion 407 is centre bore Diameter.Big valve core 9 is inserted in the centre bore of the first guide part 408, the center of the overall diameter of big valve core 9 and the first guide part 408 The diameter in hole is equal, and the interior diameter of the first guide part 408 is the diameter of centre bore.The overall diameter of first guide part 408 Less than the overall diameter of the second guide part 409, the interior diameter of the first guide part 408 is more than the interior diameter of the second guide part 409, so as to The limited step for playing position-limiting action to big valve core 9 in the axial direction is formed between first guide part 408 and the second guide part 409. Differential valve element 7 is inserted in the centre bore of the second guide part 409, the centre bore of the overall diameter of differential valve element 7 and the second guide part 409 Diameter it is equal.The diameter of the centre bore of second guide part 409 is less than the diameter of the centre bore of the first guide part 408, the The centre bore of one guide part 408 forms the big footpath chamber 404 for accommodating big valve core 9, and the centre bore formation receiving of the second guide part 409 is poor The path chamber 403 of movable valve plug 7, the diameter of path chamber 403 are less than the diameter of big footpath chamber 404.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 10, valve pocket 4 have allow liquid by and flow liquid into inside valve pocket 4 to push away The first liquid pass hole 411 that moment movable valve plug 7 moves, big valve core 9 is driven to be directed away from valve seat 11 while differential valve element 7 moves Move in direction.First liquid pass hole 411 is the through hole that setting is extended radially through on the periphery of the first guide part 408 of valve pocket 4 And first liquid pass hole 411 be circular hole, the axis of the first liquid pass hole 411 and the axis perpendicular of valve pocket 4, the first liquid pass hole 411 with Big footpath chamber 404 connects, and the first liquid pass hole 411 is simultaneously connected with the 5th opening 206 on valve body 2 and the 6th opening 207.When the 5th Be open pressure increase at 206 when, namely the 5th working hole A1 at during pressure increase, the liquid outside valve pocket 4 is through the first liquid pass hole 411 flow into the inside of valve pockets 4, namely liquid inside upright post jack flows through the 5th working hole A1 and the first liquid pass hole 411 At to differential valve element 7, liquid applies pressure to differential valve element 7, and the direction for promoting differential valve element 7 to be directed away from valve seat 11 is moved It is dynamic, drive big valve core 9 to be also directed away from the direction movement of valve seat 11 while differential valve element 7 moves, make big valve core 9 and valve seat 11 Separation, realizes the automatic opening of check valve so that the 6th liquid pass hole 301 is connected with the 4th liquid pass hole 402, and relief passage is opened, Liquid in the cavity of resorption of upright post jack flows to through the 5th working hole A1, the 4th liquid pass hole 402 and the 6th liquid pass hole 301 successively In 3rd working hole PA, automatically unloading is realized.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 10, differential valve element 7, which has, allows liquid to be connected by and with the first liquid pass hole 411 The second liquid pass hole 701, valve pocket 4 has the liquid flow for allowing liquid to connect and allow inside valve pocket 4 by and with the second liquid pass hole 701 The 3rd liquid pass hole gone out, it is arranged with valve pocket 4 for controlling the opening and closing of the 3rd liquid pass hole and distending and the chokes set shunk can be carried out 20.Differential valve element 7 is the cylinder of one end open, other end closing and inner hollow, and the openend of differential valve element 7 is towards small valve Core 10, differential valve element 7 are to be coaxially disposed with small valve core 10 and big valve core 9.The inside of differential valve element 7 has admission chamber 705 and entered Sap cavity 705 is formed on the end face for facing small valve core 10 of differential valve element 7 allows the opening that small valve core 10 passes through, and admission chamber 705 is Circular cavity, small valve core 10 can be inserted into the admission chamber 705 of differential valve element 7 and admission chamber 705 and small valve core 10 are coaxial, admission chamber 705 length is less than the length of differential valve element 7, and admission chamber 705 is connected with the second liquid pass hole 701, and the second liquid pass hole 701 is located at Admission chamber 705 radially and the second liquid pass hole 701 connects with admission chamber 705, the second liquid pass hole 701 makes admission chamber 705 and valve The big footpath chamber 404 of set 4 is in connected state all the time, and the second liquid pass hole 701 also makes admission chamber 705 be in the first liquid pass hole 411 Connected state, the liquid entered through the first liquid pass hole 411 in the big footpath chamber 404 of valve pocket 4 are flowed into differential by the second liquid pass hole 701 In the admission chamber 705 of valve element 7, the differential valve element 7 of liquid-driving moves during beneficial to automatically unloading.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 10, differential valve element 7 includes feed liquor portion 704 and the support sector 703 being connected, and enters Liquid portion 704 is used to provide big valve core 9 guide effect, and feed liquor portion 704 is inserted in the hollow cavity 902 of big valve core 9, feed liquor portion 704 be cirque structure, and admission chamber 705 is the inner chamber of feed liquor portion 704, and the second liquid pass hole 701 is the periphery in feed liquor portion 704 On extend radially through the through hole of setting and the second liquid pass hole 701 is circular hole, axis and the feed liquor portion 704 of the second liquid pass hole 701 Axis perpendicular, the second liquid pass hole 701 are distributed to be evenly distributed multiple and all second liquid pass holes 701 in feed liquor portion 704 Around admission chamber 705.Support sector 703 is cylinder, and support sector 703 is fixedly connected and supported with one end of feed liquor portion 704 With feed liquor portion 704 to be coaxially disposed, support sector 703 closes the one end open of admission chamber 705 in portion 703, feed liquor portion 704 and support To be set gradually along the axial direction of differential valve element 7, the second liquid pass hole 701 is located proximate to support sector 703 in portion 703.Support sector 703 inserts In the path chamber 403 for entering valve pocket 4, feed liquor portion 704 is inserted in the big footpath chamber 404 of valve pocket 4, and the diameter of support sector 703 is more than feed liquor The overall diameter in portion 704, the length of support sector 703 are less than the length of feed liquor portion 704, the diameter of support sector 703 and the path of valve pocket 4 The diameter of chamber 403 is identical, and the overall diameter of big valve core 9 is identical with the diameter of the big footpath chamber 404 of valve pocket 4, big valve core 9 Interior diameter is identical with the overall diameter size of feed liquor portion 704.

As shown in Figure 1, Figure 2, shown in Fig. 8 and Fig. 9, big valve core 9 is the cylinder of both ends open and inner hollow, big valve core 9 One end is for the sealed end that contact with valve seat 11, and the periphery of sealed end is circular conical surface and the circular conical surface as on big valve core 9 The sealing surface for realizing sealing is contacted with valve seat 11.The inside of big valve core 9 for accommodate small valve core 10 hollow cavity 902, small valve core 10 be cylinder, small valve core 10 have the lateral surface of sealing and the sealing be provided be used to contact with big valve core 9 realize it is close The sealing surface of envelope, the sealing surface of small valve core 10 are circular conical surface, sealing be arranged at it is in the side wall of small valve core 10 and outstanding A complete loop configuration, sealing and big valve core 9 are coaxial and sealing position in the hollow cavity 902 of big valve core 9. Small valve core 10 and big valve core 9 are engaged realization sealing and small valve core 10 and big valve core 9 are tightly connected to be hard, after closed check valve Good sealing effect, reliability are high.The first spring 12 is provided between differential valve element 7 and small valve core 10, the first spring 12 is used for difference Movable valve plug 7 applies the active force for making it be moved axially towards the direction away from differential valve element 7, and the first spring 12 simultaneously passes through Small valve core 10 promotes big valve core 9 towards movement at valve seat 11 until big valve core 9 contacts realization sealing, the first spring 12 with valve seat 11 In the admission chamber 705 of differential valve element 7 and the first spring 12 is clipped in the internal face of differential valve element 7 and the sealing of small valve core 10 Between, one end of the first spring 12 is against on the internal face of differential valve element 7, and the other end is against the end face of the sealing of small valve core 10 On, the first spring 12 is cylindrically coiled spring.In the presence of the first spring 12, small valve core 10 is done with differential valve element 7 mutually to deviate from Motion.

As shown in Figure 1, Figure 2, shown in Fig. 8 and Figure 10, big valve core 9 is sheathed on differential valve element 7, big valve core 9 and differential valve element 7 it Between be provided with link gear, differential valve element 7 and small valve core 10 are provided with spring, and link gear is arranged to make differential valve element 7 in release Big valve core 9 can be driven to be directed away from the direction movement of valve seat 11, big valve core 9 is separated with valve seat 11, realize check valve oneself Dynamic release.After the sealing surface of small valve core 10 separates with big valve core 9, the admission chamber 705 of differential valve element 7 passes through small valve core 10 and big Gap between valve element 9 connects with the 6th liquid pass hole 301 on feed liquor set 3.Contacted in the sealing surface of small valve core 10 with big valve core 9 Afterwards, the sealing on small valve core 10 separates the gap between the admission chamber 705 and small valve core 10 and big valve core 9 of differential valve element 7, And then the admission chamber 705 of differential valve element 7 is not connected with the 6th liquid pass hole 301 on feed liquor set 3.Carried out in upright post jack When setting prop acts, push rod promotes big valve core 9 and small valve core 10 to be directed away from the direction movement of valve seat 11, makes big valve core 9 and valve seat 11 separation, open locked cavity, realize the unlatching of hydraulic control one-way valve, and liquid is flowed into hydraulic control one-way valve through the 3rd opening 204, flowed into Liquid in hydraulic control one-way valve is flowed into the 5th opening 206 through the 6th liquid pass hole 301 and the 4th liquid pass hole 402 successively, and liquid is most Enter eventually in the cavity of resorption of upright post jack, realize the setting prop action of upright post jack.Opposite, carry out drop post in upright post jack When, the liquid in the cavity of resorption of upright post jack is flowed into hydraulic control one-way valves through the 5th opening 206, and final liquid is through the 3rd opening 204 outflow hydraulic control one-way valves.

As shown in Figure 1, Figure 2, shown in Fig. 8 and Figure 10, big valve core 9 has the mounting hole 901 for allowing link gear to be embedded in, differential valve element 7 have the chute 702 for allowing link gear to be embedded in, and link gear includes the He of sliding part 21 in embedded mounting hole 901 and chute 702 It is arranged in mounting hole 901 and the locating part 22 of position-limiting action is played to sliding part 21.Mounting hole 901 is the side wall in big valve core 9 On extend radially through the through hole of setting and mounting hole 901 is circumferentially uniformly arranged multiple, chute 702 in the side wall of big valve core 9 For on the periphery of differential valve element 7 along the annular groove entirely circumferentially extended.Sliding part 21 is preferably spherical, and locating part 22 is excellent Elect as in insertion mounting hole 901 and be the screw that is threadedly coupled with big valve core 9, mounting hole 901 is internal thread hole.Locating part 22 is twisted Enter in mounting hole 901, sliding part 21 is compressed so that in the embedded mounting hole 901 of a part of sliding part 21, another part insertion In chute 702, so as to realize the connection between big valve core 9 and differential valve element 7, and big valve core 9 and different valve can be made It can be relatively rotated between core 7, big valve core 9 will not separate with differential valve element 7, and link gear causes big valve core 9, different valve Core 7, the spring 12 of small valve core 10 and first is formed inside valve pocket 4 can synchronization-moving integrative-structure.Chute 702 has certain Length, sliding part 21 are the spherical partses to match with chute 702, and the length of chute 702 is more than the diameter of sliding part 21 so that big Valve element 9 can be movable along the axial direction relative to differential valve element 7.Chute 702 is recessed on the periphery of feed liquor portion 704 to be arranged at Groove, in the axial direction of differential valve element 7, the second liquid pass hole 701 is between support sector 703 and chute 702.

As preferable, as shown in Figure 1, Figure 2, shown in Fig. 8 and Figure 10, it is edge that sliding part 21, which sets multiple and multiple sliding parts 21, Circumferentially it is uniformly distributed, the quantity of mounting hole 901 and locating part 22 is identical with the quantity of sliding part 21, and each locating part 22 is distinguished embedding Enter in a mounting hole 901, each sliding part 21 is respectively embedded into a mounting hole 901, the axis and big valve core of mounting hole 901 9 axis perpendicular, mounting hole 901 and be that the through hole of setting is extended radially through in the side wall of big valve core 9.

As shown in Figure 1, Figure 2, shown in Fig. 6, Fig. 8 and Figure 10, after big valve core 9 contacts with valve seat 11, the sealing surface and valve of big valve core 9 It is linear contact lay between seat 11, forms sealing ring.Valve pocket 4 is play the guiding role to differential valve element 7, and differential valve element 7 has to be connect with valve pocket 4 The sealing surface of tactile periphery and the periphery and big valve core 9 is to be coaxially disposed, and the diameter of the periphery of differential valve element 7 is more than The diameter with the sealing ring at the contact site of valve seat 11 on the sealing surface of big valve core 9, namely the diameter of support sector 703 are more than greatly On the sealing surface of valve element 9 with the diameter at the contact site of valve seat 11, O-ring seal is provided between support sector 703 and valve pocket 4, Sealing is realized, the sealing ring is clipped between the inner headed face of support sector 703 and valve pocket 4.So pass through the different-diameter of sealing position With pressure dependence, the action under pressure differential could be completed, realizes the automatic opening of check valve and automatic unloading.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 11, the 3rd liquid pass hole is on the periphery of the first guide part 408 of valve pocket 4 Extend radially through the through hole of setting and the 3rd liquid pass hole is circular hole, the axis of the 3rd liquid pass hole and the axis perpendicular of valve pocket 4, the Three liquid pass holes are that the big footpath chamber that multiple and all 3rd liquid pass holes are distributed in valve pocket 4 is evenly distributed on the first guide part 408 Around 404, the 3rd liquid pass hole connects with big footpath chamber 404.First liquid pass hole 411 is in the outer of the first guide part 408 of valve pocket 4 Extend radially through the through hole of setting on disc and the first liquid pass hole 411 be circular hole, the second liquid pass hole 701 and the 3rd liquid pass hole it is straight Footpath is all higher than the diameter of the first liquid pass hole 411, the axis of the first liquid pass hole 411 and the axis perpendicular of valve pocket 4, the first liquid pass hole 411 set one.In the axial direction of valve pocket 4, the first liquid pass hole 411 is between the 3rd liquid pass hole and the 4th liquid pass hole.Valve pocket 4 With the storage tank 406 for accommodating chokes set 20, storage tank 406 is along the annular entirely circumferentially extended on the periphery of valve pocket 4 Groove, the 3rd liquid pass hole form opening in the inner bottom wall of storage tank 406, and chokes set 20 is cirque structure, and chokes set 20 exists It is sheathed at corresponding 3rd liquid pass hole position on valve pocket 4, all 3rd liquid pass holes are located at the inner side of chokes set 20, chokes set 20 inner headed face can be contacted with the inner bottom wall of storage tank 406, and then the 3rd liquid pass hole is closed, the 3rd liquid pass hole after closing with The valve pocket of valve body 2 and the 5th working hole A1 are not connected.After chokes set 20 separates with the inner bottom wall of storage tank 406, the 3rd can be made Liquid pass hole is opened, and the valve pocket and the 5th working hole A1 for making the 3rd liquid pass hole and valve body 2 connect.Chokes set 20 is elastomer, chokes Cover 20 flexible, chokes set 20 has certain elastic deformation amount, and the material that chokes cover 20 is preferably polyformaldehyde, resilience It is good.After chokes cover 20 distendings, the diameter increase of chokes set 20, chokes set 20 can separate with the inner bottom wall of storage tank 406;Chokes set After 20 shrink, the diameter of chokes set 20 reduces, and chokes set 20 is contacted with the inner bottom wall of storage tank 406, and the 3rd liquid pass hole is closed.

As shown in Figure 1, Figure 2 with shown in Fig. 6, as preferable, valve pocket 4 also includes being arranged at being sheathed on the He of the first guide part 408 The flange 410 being fixedly connected on second guide part 409 and with the first guide part 408 and the second guide part 409, flange 410 are circle Loop configuration, flange 410 are protruded radially toward the outside of the first guide part 408 and the second guide part 409, and storage tank 406 is set It is placed on the periphery of flange 410, the overall diameter of flange 410 is more than the overall diameter of the first guide part 408 and the second guide part 409 And less than the overall diameter of connecting portion 407, the overall diameter of flange 410 is less than the diameter of the valve pocket of valve body 2, the periphery of flange 410 There is gap between the inner headed face of the valve pocket of valve body 2 so that the 3rd liquid pass hole can be with the valve pocket and the 5th working hole of valve body 2 A1 is connected.In the axial direction of valve pocket 4, the 3rd liquid pass hole is between the 4th liquid pass hole 402 and the second guide part 409.

When pressure increases at the 5th working hole A1, liquid positioned at valve pocket 4 outside surrounds chokes set 20, chokes cover 20 by To liquid apply pressure, chokes set 20 not expansion and remain retracted state, and then by the 3rd liquid pass hole close so that the 5th Liquid in working hole A1 can only flow into the inside of valve pocket 4 to promote differential valve element 7 through the first liquid pass hole 411.It is very heavy in column When jacking row setting prop acts, push rod is needed to promote small valve core 10 and big valve core 9 to be directed away from the direction movement of valve seat 11 to realize liquid The unlatching of check valve is controlled, now the pressure increase inside differential valve element 7 and valve pocket 4, chokes set 20 is by the liquid inside valve pocket 4 The pressure of application, the expansion of chokes set 20, and then the 3rd liquid pass hole is opened, the valve pocket of the 3rd liquid pass hole after opening and valve body 2 Connected with the 5th working hole A1, and then the liquid inside valve element and valve pocket 4 is flowed into the 5th working hole A1 through the 3rd liquid pass hole, is made Obtaining big valve core 9 and small valve core 10 can quickly move, and realize the quick unlatching of hydraulic control one-way valve.Therefore, the setting of chokes set 20 Hydraulic control one-way valve when post drops in the quick unlatching of hydraulic control one-way valve and upright post jack during upright post jack feed liquor setting prop can be ensured Close, the uninstall action twice of guarantee big valve core 9 and small valve core 10 smoothly completes.In a word, the effect of chokes set 20 is to slow down Big valve core to valve seat move when speed, prevent occurring larger hydraulic shock when hydraulic control one-way valve from closing.

As shown in figure 11, to be sheathed on the cirque structure on valve pocket 4, chokes set 20 is provided with a cutting and stitched chokes set 20 Mouth 23, cutting sealing 23 disconnect chokes set 20 in the circumferential, and cutting sealing 23 is one from chokes set 20 on chokes set 20 End end starts to extend to the other end end face of chokes set 20, and the both ends end face of chokes set 20 is flat with its axis perpendicular Face.The setting of cutting sealing 23, be advantageous to rapid expanding and the contraction of chokes set 20, improve reliability.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 13, pressure regulating device includes pressure-regulating sleeve 17, is movably arranged in pressure-regulating sleeve 17 Portion and contacted with differential valve element 7 spring base 8, be arranged at the inside of pressure-regulating sleeve 17 and be the pressure regulation spiral shell that is threadedly coupled with pressure-regulating sleeve 17 Silk 19, the pressure spring 18 being arranged between voltage regulation screw 19 and spring base 8 and the unidirectional damping being arranged inside spring base 8 Mechanism, valve pocket 4, which has, allows the pilot hole 405 that spring base 8 passes through.Pilot hole 405 is to be arranged in the inside of the second guide part 409 Circular hole at the heart, pilot hole 405 and big footpath chamber 404 and path chamber 403 is coaxially disposed and the diameter of pilot hole 405 is less than path chamber 403 diameter.In the axial direction of valve pocket 4, path chamber 403 is located between pilot hole 405 and big footpath chamber 404 and three connects.Valve Set 4 is used to play pressure-regulating sleeve 17 and spring base 8 axial limiting effect, and pressure-regulating sleeve 17, to be threadedly coupled, realizes pressure regulation with valve body 2 Fixation of the mechanism on valve body 2, the periphery of pressure-regulating sleeve 17 are provided with external screw thread, and the inner headed face of valve body 2 is provided with internal thread.Adjust Gland 17 is both ends open and the cylinder of inner hollow, and voltage regulation screw 19, spring base 8 and pressure spring 18 are arranged at pressure-regulating sleeve In 17 hollow cavity.Voltage regulation screw 19 closes the one end open of pressure-regulating sleeve 17, the other end end face of valve pocket 4 and pressure-regulating sleeve 17 Contact and valve pocket 4 closes the end opening of pressure-regulating sleeve 17.Spring base 8 passes through the pilot hole 405 of valve pocket 4 and inserts air storing cavity 24 In, air storing cavity 24 is positioned at the inside of valve pocket 4 and the end face phase with differential valve element 7 in the end face and valve pocket 4 of differential valve element 7 To inner bottom surface between cavity, the end face of differential valve element 7 and the inner bottom surface of valve pocket 4 are flat with the axis perpendicular of valve pocket 4 Face, i.e. air storing cavity 24 are a part for the path chamber 403 of valve pocket 4, and air storing cavity 24 is positioned at the differential guide part of valve element 7 and second Cavity between 409, liquid is introduced into air storing cavity 24, spring base 8 is clipped between pressure spring 18 and differential valve element 7, pressure regulation The active force that spring 18 applies to spring base 8 makes spring base 8 remain contact condition with differential valve element 7, and then to different valve Core 7 applies elastic acting force vertically.Pressure spring 18 simultaneously is used to promote differential valve element 7 towards the direction close to valve seat 11 to enter Row movement, realizes the reset of differential valve element 7, and then realize the closing of hydraulic control one-way valve.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 13, voltage regulation screw 19 is cylinder, and voltage regulation screw 19 and pressure-regulating sleeve 17 are screw thread Connection, the periphery of voltage regulation screw 19 are provided with external screw thread, and the inner headed face of pressure-regulating sleeve 17 is provided with internal thread, and voltage regulation screw 19 exists Position-adjustable inside pressure-regulating sleeve 17, therefore voltage regulation screw 19 is set to be threadedly coupled with pressure-regulating sleeve 17, so it is easy to Adjust axial location of the voltage regulation screw 19 in pressure-regulating sleeve 17.Pressure spring 18 is clipped between spring base 8 and voltage regulation screw 19, is adjusted When pressure screw 19 is in diverse location, the pretightning force of pressure spring 18 is of different sizes, therefore can realize that hydraulic control one-way valve works The regulation of pressure size, hydraulic control one-way valve is can adapt to the job requirement of different pressures, improve the general of hydraulic control one-way valve Property.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 12, spring base 8 is by limiting section 801, first boss 802 and second boss 803 Form, limiting section 801, first boss 802 and second boss 803 are cylinder, and first boss 802 and second boss 803 are divided It is not fixedly connected in the side of limiting section 801 with limiting section 801, forms the spring base 8 of integrative-structure.First boss 802 and Two boss 803 are coaxially disposed with limiting section 801, and the overall diameter of limiting section 801 is more than first boss 802 and second boss 803 Overall diameter.Pressure spring 18 is cylindrically coiled spring, and second boss 803 is for insertion into pressure spring 18 to pressure spring 18 One end positioned.The overall diameter of first boss 802 is identical with the diameter of the pilot hole 405 on valve pocket 4, first boss Contacted in 802 one end insertion air storing cavity 24 with differential valve element 7, the other end of first boss 802 is with being located inside pressure-regulating sleeve 17 Limiting section 801 be fixedly connected, limiting section 801 is located in the hollow cavity of pressure-regulating sleeve 17, and the overall diameter of limiting section 801, which is more than, leads To the diameter in hole 405.After hydraulic control one-way valve closing, valve pocket 4 contacts with limiting section 801, and valve pocket 4 plays spacing to spring base 8 Effect.Unidirectional damping mechanism is arranged at the inside of spring base 8, and the gas that unidirectional damping mechanism is arranged on air storing cavity 24 flows into pressure regulation Unidirectional damping effect is played during in the hollow cavity of set 17 so that spring base 8 can play buffering to differential valve element 7 and make With causing pressure change and the effect in pressure spring 18 when preventing differential valve element 7 from driving big valve core 9 to open release after moving Lower big valve core 9 produces punching towards valve seat 11 when quickly movement causes the working conditions such as pressure moment rise to close after discharge channel The generation of pressure phenomenon is hit, and when the setting of unidirectional damping mechanism is also possible to prevent hydraulic control one-way valve and is again turned on and is again switched off Differential valve element 7 and big valve core 9 frequently move repeatedly and produce the generation of percussive pressure phenomenon, improve the stabilization of hydraulic control one-way valve Property, also improve the stability of whole hydraulic system.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 12, unidirectional damping mechanism includes nonreturn valve core 14, screw plug 16 and is arranged at list To the back-moving spring 15 between valve element 14 and screw plug 16, the inside of spring base 8 is provided with the valve for accommodating nonreturn valve core 14 and screw plug 16 Chamber 806, air admission hole 805 and the intercommunicating pore 804 for connecting the hollow cavity of valve pocket 4 and air admission hole 805, air admission hole 805 it is straight Footpath is less than the diameter of valve pocket 806 and nonreturn valve core 14.Valve pocket 806 is to be arranged at the circular cavity at the inside center of spring base 8, is entered Stomata 805 is to be arranged at the circular hole at the inside center hole of spring base 8, and air admission hole 805 is to be coaxially disposed with valve pocket 806.Intercommunicating pore 804 be circular hole, and the axis of intercommunicating pore 804 and the axis perpendicular of air admission hole 805, the diameter of intercommunicating pore 804 are less than air admission hole 805 Diameter, intercommunicating pore 804 can also be used as damping hole.Intercommunicating pore 804 is that beginning is convex along first on the periphery of first boss 802 Platform 802 is extended radially at air admission hole 805, and air admission hole 805 is arranged at the inside center hole of first boss 802, intercommunicating pore 804 end face contacted with differential valve element 7 for being located proximate to first boss 802, in first boss 802 where intercommunicating pore 804 End is always positioned in air storing cavity 24, so that the air storing cavity 24 of air admission hole 805 remains connected state.In differential valve element 7 When being directed away from the direction movement of valve seat 11, air in air storing cavity 24 is pushed into stomata 805 by differential valve element 7, is then pushed open Nonreturn valve core 14, final air after valve pocket 806 and screw plug 16 into pressure-regulating sleeve 17 hollow cavity in, pressure-regulating sleeve 17 it is hollow Also liquid is introduced into inner chamber.

As shown in Figure 1, Figure 2, shown in Fig. 6 and Figure 12, screw plug 16 is cylinder, and screw plug 16 is to be threadedly coupled with spring base 8, screw plug 16 with the through hole that the valve pocket 806 of spring base 8 connects with the hollow cavity of pressure-regulating sleeve 17 is made, and the through hole is at the center of screw plug 16 Axially through the circular hole of setting, the through hole causes the valve pocket 806 of spring base 8 and the hollow cavity of pressure-regulating sleeve 17 to be in all the time at place Connected state.The inside of spring base 8 has the internal thread hole for accommodating screw plug 16 and the internal thread hole faces pressure regulation in spring base 8 Formed on the end face of screw 19 and allow the opening that screw plug 16 passes through, the diameter of the internal thread hole is more than the straight of the valve pocket 806 of spring base 8 Footpath, the periphery of screw plug 16 are provided with external screw thread.Screw plug 16, to be coaxially disposed, screw plug 16 and spring base 8 is set with spring base 8 Into threaded connection, facilitate the dismounting of unidirectional damping mechanism, be easy to the maintenance of hydraulic control one-way valve.

As shown in Figure 1, Figure 2 with shown in Figure 12, back-moving spring 15 is cylindrically coiled spring, and back-moving spring 15 is clipped in nonreturn valve core 14 Between screw plug 16.Nonreturn valve core 14 is preferably spherical, and the diameter of nonreturn valve core 14 is more than the diameter of air admission hole 805, check valve The diameter of core 14 be less than spring base 8 valve pocket 806 diameter, nonreturn valve core 14 between air admission hole 805 and back-moving spring 15, Back-moving spring 15 is used to promote nonreturn valve core 14 to move towards the direction close to air admission hole 805, by the envelope of air admission hole 805 Close, air admission hole 805 is not connected with the valve pocket 806 of spring base 8.Air in air storing cavity 24 is pushed into air inlet by movable valve plug 7 of being on duty In hole 805, make caused by the counteracted by pressure back-moving spring 15 that applies into the compressed air in air admission hole 805 to nonreturn valve core 14 Firmly, nonreturn valve core 14 moves towards the direction close to screw plug 16, air admission hole 805 is opened so that air admission hole 805 and bullet The valve pocket 806 of spring abutment 8 connects.

As shown in Figure 1, Figure 2 with shown in Figure 14, in use, the present invention hydraulic control one-way valve changed with upright post jack and 3-position 4-way Connected to valve, the 3rd working hole PA (i.e. working hole PA in Figure 14) of hydraulic control one-way valve and the 7th working hole PB are (i.e. in Figure 14 Working hole PB) be connected with three position four-way directional control valve, the first working hole B (i.e. working hole B in Figure 14) of hydraulic control one-way valve and 5th working hole A1 (i.e. working hole A in Figure 14) is connected with upright post jack, and the first working hole simultaneously has with upright post jack Rod cavity is connected, and the 5th working hole is simultaneously connected with the rodless cavity of upright post jack, and the 4th working hole PA ' of hydraulic control one-way valve (schemes Working hole PA ' in 14) and the 8th working hole PB ' (i.e. working hole PB ' in Figure 14) and the hydraulic control one-way valve for connecing other adjacent frame, The 6th working hole A2 (i.e. working hole A2 in Figure 14) of hydraulic control one-way valve is used for pressure gauge or pressure sensor with outside Connect to meet other desired needs.

Upright post jack carry out setting prop action process be:When working condition requirement upright post jack rises, pass through three four The control of logical reversal valve, opens the 3rd working hole of hydraulic control one-way valve, fluid enters hydraulic control one-way valve, and hydraulic control one-way valve is opened Open, high-voltage oil liquid enters the cavity of resorption (i.e. rodless cavity) of upright post jack through hydraulic control one-way valve, with the entrance of high-voltage oil liquid so that Upright post jack overcomes top roof pressure and risen, after upright post jack rises to predetermined altitude, three position four-way directional control valve Stop the 3rd working hole feed flow to hydraulic control one-way valve, the core assembly of hydraulic control one-way valve is due to the spring effect reset shape of inside Into locking states, now upright post jack holding holding state.

Upright post jack carries out dropping the process that post acts:When working condition requirement upright post jack declines, pass through three four The control of logical reversal valve, opens the 7th working hole of hydraulic control one-way valve, fluid enters hydraulic control one-way valve, into hydraulic control one-way valve In fluid promote the push rod movement of core assembly, and then big valve core 9 is separated with valve seat 11, opening locked cavity, while fluid Enter the epicoele (i.e. rod chamber) of upright post jack by the first working hole, the high-voltage oil liquid in the cavity of resorption of upright post jack is reverse Flow into hydraulic control one-way valve, and three position four-way directional control valve is flowed into by the 3rd working hole, eventually enter into major loop, now column thousand Jin top declines, and when upright post jack drops to desired height, three position four-way directional control valve stops the 7th work to hydraulic control one-way valve Make confession liquid, the core assembly of hydraulic control one-way valve is because the spring effect of inside resets to form locking states, and now column is very heavy Recover holding state in top.

When the pressure of the lower intracavitary of upright post jack exceedes the operating pressure of hydraulic control one-way valve, hydraulic control one-way valve can be automatic Open release so that the pressure fluid outflow of the lower intracavitary of upright post jack, realize pressure reduction, complete unloading for upright post jack Carry, it is ensured that the security of hydraulic system, and make hydraulic control one-way valve without external overflow valve (i.e. safety valve), without relying upon external Overflow valve realizes release, and liquid will not be discharged into outside hydraulic system, will not thus cause liquid waste and impurely under Environment.

The present invention is exemplarily described above in association with accompanying drawing.Obviously, present invention specific implementation is not by above-mentioned side The limitation of formula.As long as employ 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 scheme are directly applied into other occasions, in protection scope of the present invention Within.

Claims (10)

1. unloading hydraulic control one-way valve automatically, including valve body, swivel nut, feed liquor set, valve seat, valve pocket, the big valve being arranged inside valve pocket Core and the small valve core being arranged inside big valve core, it is characterised in that:Also include movably being arranged inside the valve pocket and use The differential valve element moved in the control big valve core and the pressure regulating device for applying elastic acting force to differential valve element.
2. automatic unloading hydraulic control one-way valve according to claim 1, it is characterised in that:The valve pocket, which has, allows liquid to pass through And flow liquid into promote the first liquid pass hole of the differential valve element movement inside valve pocket, differential valve element drives while movement The big valve core is directed away from the direction movement of valve seat.
3. automatic unloading hydraulic control one-way valve according to claim 2, it is characterised in that:The differential valve element, which has, allows liquid The second liquid pass hole connected by and with first liquid pass hole, the valve pocket, which has, allows liquid to connect by and with the second liquid pass hole The 3rd liquid pass hole of liquid outflow that is logical and allowing inside valve pocket, it is arranged with for controlling the opening and closing of the 3rd liquid pass hole and can enter on valve pocket Row distending and the chokes set shunk.
4. automatic unloading hydraulic control one-way valve according to any one of claims 1 to 3, it is characterised in that:The big valve core is arranged In on the differential valve element, being provided with link gear between big valve core and differential valve element, differential valve element and small valve core are provided with spring, connection Motivation structure is arranged to the direction movement for enabling differential valve element drive big valve core to be directed away from the valve seat in release.
5. automatic unloading hydraulic control one-way valve according to claim 4, it is characterised in that:The big valve core is described with allowing The mounting hole of motivation structure insertion, the differential valve element have the chute for allowing link gear to be embedded in, and link gear includes embedded install Sliding part in hole and chute and be arranged in mounting hole and the locating part of position-limiting action played to sliding part, sliding part be it is spherical, For locating part with big valve core to be threadedly coupled, mounting hole is internal thread hole.
6. automatic unloading hydraulic control one-way valve according to any one of claims 1 to 5, it is characterised in that:The swivel nut passes through spiral shell Nail connects with feed liquor set, and feed liquor set has the lock groove for allowing screw to insert with the internal thread hole for allowing screw to insert, swivel nut, Feed liquor is covered with the valve pocket to be threadedly coupled, and swivel nut is to be threadedly coupled with the valve body.
7. automatic unloading hydraulic control one-way valve according to claim 6, it is characterised in that:The lock groove is in the swivel nut Periphery on along the annular groove entirely circumferentially extended, the screw sets multiple and multiple screws as circumferentially uniformly point Cloth.
8. automatic unloading hydraulic control one-way valve according to any one of claims 1 to 7, it is characterised in that:The pressure regulating device bag Include pressure-regulating sleeve, it is moveable be arranged at spring base contact inside pressure-regulating sleeve and with differential valve element, be arranged at pressure-regulating sleeve inside and For the voltage regulation screw of threaded connection, the pressure spring that is arranged between voltage regulation screw and spring base and institute is arranged at pressure-regulating sleeve State the unidirectional damping mechanism inside spring base, the valve pocket, which has, allows the pilot hole that spring base passes through.
9. automatic unloading hydraulic control one-way valve according to claim 8, it is characterised in that:The unidirectional damping mechanism includes single To valve element, screw plug and the back-moving spring being arranged between nonreturn valve core and screw plug, the inside of the spring base, which is provided with, accommodates list To valve element and the valve pocket, air admission hole and the intercommunicating pore for connecting the hollow cavity of the valve pocket and air admission hole of screw plug, air admission hole Diameter be less than the diameter of valve pocket and nonreturn valve core.
10. automatic unloading hydraulic control one-way valve according to claim 9, it is characterised in that:The screw plug and the spring base For threaded connection, screw plug have make the through hole that the valve pocket connects with the hollow cavity of pressure-regulating sleeve.
CN201711016808.9A 2017-10-26 2017-10-26 Automatic unloading hydraulic control one-way valve CN107842381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711016808.9A CN107842381A (en) 2017-10-26 2017-10-26 Automatic unloading hydraulic control one-way valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711016808.9A CN107842381A (en) 2017-10-26 2017-10-26 Automatic unloading hydraulic control one-way valve

Publications (1)

Publication Number Publication Date
CN107842381A true CN107842381A (en) 2018-03-27

Family

ID=61663008

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711016808.9A CN107842381A (en) 2017-10-26 2017-10-26 Automatic unloading hydraulic control one-way valve

Country Status (1)

Country Link
CN (1) CN107842381A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575258A (en) * 2017-10-27 2018-01-12 鸿大智能机械有限公司 Automatic pressure relief device suitable for hydraulic control one-way valve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523328A2 (en) * 1991-07-17 1993-01-20 Richard Voss Grubenausbau Gmbh Adjustable spraying valve
CN202560256U (en) * 2012-04-10 2012-11-28 巨隆集团芜湖兴隆液压有限公司 Plug-in type stand column hydraulic control one-way valve
CN203130118U (en) * 2013-03-05 2013-08-14 巨隆集团芜湖兴隆液压有限公司 Differential pressure combination valve
CN203441509U (en) * 2013-09-04 2014-02-19 巨隆集团芜湖兴隆液压有限公司 Novel large-flow hydraulic control one-way valve
CN204200248U (en) * 2014-11-05 2015-03-11 乐清市东风煤矿设备有限公司 A kind of coal mine hydraulic supporting column pilot operated check valve
CN105909583A (en) * 2016-03-02 2016-08-31 杭州力龙液压有限公司 Buffer overflow valve and hydraulic system
CN205990922U (en) * 2016-05-13 2017-03-01 鑫矿液压科技有限公司 Column pilot operated check valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523328A2 (en) * 1991-07-17 1993-01-20 Richard Voss Grubenausbau Gmbh Adjustable spraying valve
CN202560256U (en) * 2012-04-10 2012-11-28 巨隆集团芜湖兴隆液压有限公司 Plug-in type stand column hydraulic control one-way valve
CN203130118U (en) * 2013-03-05 2013-08-14 巨隆集团芜湖兴隆液压有限公司 Differential pressure combination valve
CN203441509U (en) * 2013-09-04 2014-02-19 巨隆集团芜湖兴隆液压有限公司 Novel large-flow hydraulic control one-way valve
CN204200248U (en) * 2014-11-05 2015-03-11 乐清市东风煤矿设备有限公司 A kind of coal mine hydraulic supporting column pilot operated check valve
CN105909583A (en) * 2016-03-02 2016-08-31 杭州力龙液压有限公司 Buffer overflow valve and hydraulic system
CN205990922U (en) * 2016-05-13 2017-03-01 鑫矿液压科技有限公司 Column pilot operated check valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575258A (en) * 2017-10-27 2018-01-12 鸿大智能机械有限公司 Automatic pressure relief device suitable for hydraulic control one-way valve

Similar Documents

Publication Publication Date Title
US5499687A (en) Downhole valve for oil/gas well
CA1236008A (en) Packer assembly
AU2002242652B2 (en) Device for anchoring a drill string in a borehole
CN1816679B (en) Downhole tool having radially extendable members
CA2577542C (en) A drill-string connector
US7284619B2 (en) Packer with positionable collar
US6772839B1 (en) Method and apparatus for mechanically perforating a well casing or other tubular structure for testing, stimulation or other remedial operations
SU845796A3 (en) Shocking hydraulic device
CN102839920B (en) Multi-segment transforming tubular column for horizontal well and use method for same
CN102996557A (en) Pressure adjustable buffer overflow valve
CN102310391B (en) Tool equipment
CN105121867B (en) Modular event driven device with buffer unit
CN204419067U (en) Drilling well controllable diameter changeable stabilizer
CN104632109B (en) It is a kind of to repeat the circulating sub of opening and closing
CN203175447U (en) Expansion pipe twin-stage expansion device
US2999572A (en) Earth anchor
WO2015112908A2 (en) Systems and methods for polymer degradation reduction
CN2698966Y (en) Hydraulic down-hole casing valve for under balance drilling
BR112012033417B1 (en) Circulation valve tools and for use in underground hydrocarbide production
CN101581196B (en) Impacting helicoid hydraulic motor and transmission shaft assembly
WO2017114149A1 (en) Mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology
BR112012002345B1 (en) Deviation valve apparatus for mounting in a drilling column and method for using a deviation valve apparatus for mounting on a drilling column
CN106401530B (en) A kind of by-passing valve of drilling well energy repeat switch
WO1995025874A1 (en) Valve for use in float equipment
CN201915931U (en) Special setting ball seat for fracture of horizontal well

Legal Events

Date Code Title Description
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
WW01 Invention patent application withdrawn after publication

Application publication date: 20180327