An integrated high-pressure and ultra-large flow hydraulic distribution valve

Abstract

The present invention relates to an integral high-pressure and ultra-large flow hydraulic distributing valve, comprising a valve body, wherein a stepped groove is provided in the valve body, which is located at the same hole center and has a decreasing aperture from top to bottom, the bottom of the stepped groove is connected to the liquid inlet through hole, and the suction valve seat, suction valve core, extrusion valve seat, extrusion valve core and extrusion valve stopper that contact and cooperate with each other are arranged in sequence upward along the bottom of the stepped groove, and the extrusion valve stopper is connected to the liquid discharge through hole. The present invention has a compact and reasonable structure and is easy to operate. By adopting a flat valve structure, the lower part of the suction valve core has a parabolic structure, which is conducive to reducing valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure, which solves the problem of the valve core rotating when impacted by high-speed uneven fluid; the extrusion valve seat is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core and enhancing the operating stability of the distributing valve.

Description

Technical Field

[0001] The invention relates to the technical field of volumetric hydraulic pumps, in particular to an integral high-pressure and ultra-large-flow hydraulic distribution valve. Background Art

[0002] High-pressure plunger pumps have the advantages of simple structure, impact resistance, and easy to achieve high pressure. They are widely used in high-pressure water cleaning, coal seam water injection, underground support and other fields. The water pressure distribution valve is a key distribution control element of the high-pressure plunger pump. Compared with the shaft distribution and end face distribution, it reduces a pair of friction pairs (distribution disc and cylinder body, or distribution shaft and cylinder body), and has good sealing. It is widely used in high-pressure and large-flow water hydraulic pumps. The performance of the distribution valve directly affects the volumetric efficiency and service life of the hydraulic pump. With the continuous improvement of the mining capacity of the underground working face of coal mines, the flow rate of the high-pressure plunger pump exceeds 1600L / min and the power exceeds 1MW, and it is necessary to provide a matching high-pressure and ultra-large flow water pressure distribution valve.

[0003] Compared with small and medium flow distribution valves, the internal flow of ultra-large flow distribution valves is more complicated, and the valve core is prone to rotation under the action of uneven flow field. The existing distribution valve structure generally lacks rotation restriction of the valve core. The combined effect of valve core rotation and high-speed impact can easily cause impact sliding wear of the sealing surface, thereby affecting the sealing reliability; in addition, when the distribution valve is used in water medium, due to the low vaporization pressure of water and the large elastic modulus, the cavitation and fluid impact of the valve port are serious; the above factors seriously restrict the service life of the distribution valve.

[0004] Existing distribution valves generally adopt a split arrangement. For large flow distribution valves, this structure increases the dead volume, thereby affecting the volumetric efficiency of the plunger pump. Patent CN202110751428.X discloses a distribution valve structure, which arranges the suction valve and the extrusion valve in the same stepped hole, reducing the dead volume. However, in this structure, the extrusion valve core also serves as a limit device for the suction valve, resulting in an increase in the operating frequency of the suction valve spring 4, which is not conducive to improving the life of the distribution valve.

[0005] To this end, we propose an integrated high-pressure and ultra-large flow water pressure distribution valve. Summary of the invention

[0006] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an integral high-pressure and ultra-large flow water pressure distribution valve, which adopts a flat valve structure to reduce the impact stress of the valve core on the valve seat. The lower part of the valve core of the suction valve has a parabolic structure, which is beneficial to reduce valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure to solve the problem of the valve core rotating when impacted by high-speed uneven fluid; the valve seat of the extrusion valve is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core and enhancing the operating stability of the distribution valve.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An integral high-pressure and ultra-large flow hydraulic distributing valve comprises a valve body, wherein a stepped groove is provided in the valve body, the groove being located at the same hole center and having a hole diameter decreasing from top to bottom, the bottom of the stepped groove is connected to a liquid inlet through hole, and a suction valve seat, a suction valve core, an extrusion valve seat, an extrusion valve core and an extrusion valve stopper are sequentially arranged upward along the bottom of the stepped groove, the extrusion valve stopper is connected to the liquid discharge through hole, and a plunger cavity is arranged on the side wall of the valve body between the extrusion valve seat and the suction valve seat;

[0009] A spring is arranged between the valve seat of the extrusion valve and the valve core of the suction valve, and between the stopper of the extrusion valve and the valve core of the extrusion valve;

[0010] The lower ends of the extrusion valve stopper and the extrusion valve seat are both provided with guide holes, and the upper ends of the suction valve core and the extrusion valve core are provided with guide rods extending to the guide holes and capable of reciprocating motion, and the guide holes are provided with anti-rotation rings to prevent the guide rods from rotating;

[0011] The lower ends of the suction valve core and the extrusion valve core are distributed in a plane in the circumferential direction and are intermittently in contact and sealed with the valve seat, and the middle parts of the lower ends of the suction valve core and the extrusion valve core are convex;

[0012] The extrusion valve seat is provided with an oblique hedging structure to connect the upper and lower cavities of the extrusion valve seat, including a plurality of evenly arranged hedging oblique holes. The extrusion valve seat is provided with a confluence groove, and the plurality of evenly arranged hedging oblique holes are connected to the confluence groove.

[0013] It is further characterized by:

[0014] The stepped groove includes a first mounting hole, a second mounting hole, and a third mounting hole which are connected in sequence along the height direction starting from the upper part of the valve body. The first mounting hole is connected to the liquid discharge through hole, the second mounting hole is connected to the plunger cavity, and the third mounting hole is connected to the liquid inlet through hole. A cover plate is provided on the top of the valve body to close the stepped groove.

[0015] An exhaust hole is provided in the second installation hole of the valve body. A sealing ball and a sealing screw plug are arranged in the exhaust hole. The sealing ball is made of ceramic material.

[0016] The suction valve seat is provided with a first cone, a first step and a second step, the first step is arranged in the second mounting hole, the first cone is flat and in circumferential contact with the suction valve core, the second step is arranged in the third mounting hole, and the second step and the third mounting hole are interference fit, the suction valve seat has a guide inner hole, the lower part of the guide inner hole has a trumpet-shaped first guide hole to achieve a converging effect, and the upper part of the first guide hole has a cylindrical second guide hole.

[0017] The valve seat of the extrusion valve is provided with a second cone, a first stop step, a third step and a fourth step. The second cone is arranged in a plane and is in circumferential contact with the valve core of the extrusion valve. The third step is arranged in the first mounting hole, and the fourth step is arranged in the second mounting hole. The second step of the valve seat of the extrusion valve is circumferentially provided with a first annular sealing groove, and the first annular sealing groove is used to set a first annular sealing ring. An intake valve spring is arranged between the first stop step and the valve core of the intake valve. The oblique hedging structure of the valve seat of the extrusion valve includes a plurality of evenly arranged hedging oblique holes. The valve seat of the extrusion valve is provided with a confluence groove, and a plurality of evenly arranged hedging oblique holes are connected to the confluence groove.

[0018] The lower part of the suction valve core protrudes into a parabolic structure, and the lower part of the extrusion valve core protrudes into a streamlined structure. The streamlined structure of the extrusion valve core includes a hemispherical structure at the bottom of the valve core and an arc structure on the upper part of the hemispherical structure.

[0019] The extrusion valve stopper is provided with a second stop step, a fifth step and a sixth step, an extrusion valve spring is provided between the second stop step and the valve core of the extrusion valve, a second annular sealing groove is circumferentially provided on the fifth step, the second annular sealing groove is used to set a second annular sealing ring, the top of the fifth step is higher than the upper surface of the valve body, and a guide hole that penetrates the guide hole and guides the liquid in the guide hole is also opened on the side wall of the extrusion valve stopper, and a cover plate is arranged on the extrusion valve stopper.

[0020] A pressure ring and an anti-rotation ring are also provided in the guide hole. The pressure ring fits on the inner top wall of the guide hole, and the anti-rotation ring is nested in the guide hole and cooperates with the gap of the guide rod. A plurality of evenly distributed spherical anti-rotation bosses are provided on the upper part of the inner hole of the anti-rotation ring, and a plurality of anti-rotation grooves cooperating with the anti-rotation bosses are provided on the upper part of the guide rod.

[0021] The material of the anti-rotation ring is corrosion-resistant and wear-resistant alloy, and the material of the valve core is high-strength stainless steel.

[0022] A hydraulic discharge sleeve is arranged between the valve seat of the extrusion valve and the stopper of the extrusion valve, and a flow hole corresponding to the liquid discharge through hole is opened in the circumference of the hydraulic discharge sleeve.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention has a compact and reasonable structure and is easy to operate. The flat valve structure is adopted to reduce the impact stress of the valve core on the valve seat. The lower part of the valve core of the extrusion valve has a streamlined structure, which is conducive to reducing the flow resistance of the fluid. The lower part of the valve core of the suction valve has a parabolic structure, which is conducive to reducing valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure, which solves the problem of the valve core rotating when impacted by high-speed uneven fluid; the valve seat of the extrusion valve is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core, further reducing the rotation of the valve core, and enhancing the operating stability of the distribution valve; at the same time, the suction valve and the extrusion valve are installed as a whole in the same stepped hole, which reduces the dead volume and improves the volumetric efficiency of the hydraulic pump. It has the characteristics of simple structure and easy disassembly and assembly.

[0025] At the same time, the present invention also has the following advantages:

[0026] (1) Both the suction valve and the discharge valve are designed with a low-friction anti-rotation structure, which uses multiple spherical anti-rotation bosses and anti-rotation grooves to solve the problem of the valve core rotating when it is impacted by high-speed uneven fluid, thereby reducing the sliding wear of the valve core and the valve seat at the moment of impact, and improving the sealing reliability; at the same time, the anti-rotation boss is spherical and has a lower friction coefficient, which is beneficial to reducing the friction and wear between the valve core guide rod and the anti-rotation ring when the valve core reciprocates, thereby increasing the service life of the distribution valve. At the same time, due to the reduction of friction resistance, the response speed of the distribution valve is improved.

[0027] (2) The distribution valve adopts a flat valve structure. Compared with other types of valves such as cone valves and ball valves, the opening of the flat valve is smaller under the same flow capacity, which reduces the stroke of the valve core and helps to reduce the closing lag of the distribution valve, thereby improving the volumetric efficiency of the plunger pump.

[0028] (3) The valve port seal is a flat hard seal, which reduces the impact stress of the valve core on the valve seat. At the same time, steps are provided on the sealing surfaces of the suction valve seat and the discharge valve seat to compensate for the deformation of the sealing surface between the valve core and the valve seat caused by impact, further improving the reliability of the seal.

[0029] (4) The lower part of the suction valve core has a parabolic structure, and the suction valve seat has a guide hole, which reduces the vortex and flow resistance of the flow field, increases the suction capacity of the suction valve, and thus reduces the cavitation of the valve port; the lower part of the discharge valve core has a streamlined structure, which is beneficial to reducing the flow resistance of the fluid. At the same time, the discharge valve seat is provided with an oblique counter-impact structure. The oblique counter-impact structure cooperates with the streamlined structure to reduce the impact of high-speed fluid on the discharge valve core, and further prevents the rotation of the valve core.

[0030] (5) An exhaust hole is provided on the side wall of the valve body 1, and a sealing ball and a sealing screw plug are provided in the exhaust hole; the sealing ball is made of ceramic material instead of traditional stainless steel material, which improves the sealing reliability of the exhaust hole under alternating pressure load and the service life of the sealing ball.

[0031] (6) The suction valve and the discharge valve are installed in the same stepped hole, which reduces the dead volume and improves the volumetric efficiency of the hydraulic pump. The suction valve and the discharge valve are both installed vertically, and the valve core will not be eccentric when moving under the action of gravity. The overall structure is simple and easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic cross-sectional view of the structure of the present invention.

[0033] Figure 2 It is a cross-sectional schematic diagram of the valve seat structure of the suction valve of the present invention.

[0034] Figure 3 It is a cross-sectional schematic diagram of the valve core structure of the suction valve of the present invention.

[0035] Figure 4 It is a cross-sectional schematic diagram of the valve seat structure of the extrusion valve of the present invention.

[0036] Figure 5 It is a cross-sectional schematic diagram of the valve core structure of the extrusion valve of the present invention.

[0037] Figure 6 It is a cross-sectional schematic diagram of the structure of the extrusion valve stopper of the present invention.

[0038] Figure 7 It is a cross-sectional schematic diagram of the anti-rotation ring structure of the present invention.

[0039] in:

[0040] 1. Valve body; 2. Suction valve seat; 3. Suction valve core; 4. Suction valve spring; 5. Anti-rotation ring; 6. Pressing ring; 7. Extrusion valve seat; 8. First annular sealing ring; 9. Extrusion valve core; 10. Extrusion valve spring; 11. Extrusion valve stopper; 12. Exhaust hydraulic sleeve; 13. Second annular sealing ring; 14. Cover plate; 15. Sealing ball; 16. Sealing screw plug;

[0041] 201, first truncated cone; 202, first step; 203, second step; 204, first flow guide hole; 205, second flow guide hole;

[0042] 301, guide rod; 302, anti-rotation groove; 303, parabolic structure;

[0043] 501, anti-rotation boss;

[0044] 701, inclined hole; 702, second truncated cone; 703, third step; 704, fourth step; 705, confluence groove; 706, first annular sealing groove; 707, first stop step;

[0045] 901, guide rod; 902, anti-rotation groove; 903, hemispherical structure; 904, arc structure;

[0046] 1101, guide hole; 1102, second stop step; 1103, sixth step; 1104, guide hole; 1105, second annular sealing groove; 1106, fifth step;

[0047] a, first mounting hole; b, second mounting hole; c, third mounting hole; d, liquid inlet hole. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0049] like Figure 1-Figure 7 As shown, an integral high-pressure and ultra-large flow distribution valve is provided, the distribution valve comprises a valve body 1 and a plurality of distribution valve assemblies, the valve body 1 has a plurality of stepped grooves, and the distribution valve assemblies are respectively installed in the stepped grooves.

[0050] The flow distribution valve assembly includes an intake valve seat 2, an intake valve core 3, an intake valve spring 4, an extrusion valve seat 7, an extrusion valve core 9, an extrusion valve spring 10, a hydraulic sleeve 12, an extrusion valve stopper 11, and a cover plate 14, which are arranged in sequence in the step groove from the bottom of the step groove.

[0051] The valve seat 7 of the extrusion valve has a first stop step 707, which can limit the suction valve, and the stopper 11 of the extrusion valve has a second stop step 1102, which can limit the extrusion valve.

[0052] The stepped groove includes a first mounting hole a, a second mounting hole b, and a third mounting hole c which are connected in sequence along the height direction starting from the upper part of the valve body 1; a liquid inlet through hole d is arranged at the bottom of the valve body 1, and a liquid discharge through hole is arranged at the upper part of the valve body 1; the apertures of the first mounting hole a, the second mounting hole b, and the third mounting hole c are reduced in sequence, which is convenient for the installation of the valve seat and can also improve the sealing effect; the hole centers of the first mounting hole a, the second mounting hole b, and the third mounting hole c are on the same straight line, which is convenient for liquid circulation and reduces damage to the valve wall; the first mounting hole a is connected with the liquid discharge through hole, the second mounting hole b is connected with the plunger cavity, and the third mounting hole c is connected with the liquid inlet through hole d; in addition, in order to reduce damage to the valve core 3 of the suction valve, the lower part of the valve core 3 of the suction valve has a parabolic structure 303 to increase the contact area with the liquid, thereby protecting the valve core.

[0053] The lower ends of the extrusion valve stopper 11 and the extrusion valve seat 7 are both provided with a guide hole 1101, and the pressure ring 6 and the anti-rotation ring 5 are sequentially installed in the guide hole 1101; the suction valve core 3 and the extrusion valve core 9 are both provided with a guide rod (301 / 901), and the lower part of the guide rod (301 / 901) and the lower part of the inner hole of the anti-rotation ring 5 are clearance-matched to ensure that the valve core moves axially, and the upper part of the inner hole of the anti-rotation ring 5 is provided with a plurality of evenly distributed spherical anti-rotation bosses 501, and the upper part of the guide rod (301 / 901) is provided with a plurality of evenly distributed anti-rotation grooves (302 / 902), and the anti-rotation bosses 501 and the anti-rotation grooves (302 / 902) cooperate with each other to prevent the valve core from rotating under the impact of high-speed water flow, and the number of the anti-rotation bosses 501 and the anti-rotation grooves (302 / 902) can be adjusted according to the specific implementation method.

[0054] The material of the anti-rotation ring 5 is a corrosion-resistant and wear-resistant alloy, and the material of the valve core is high-strength stainless steel.

[0055] The suction valve seat 2 is provided with a first step 202 and a second step 203, the first step 202 is arranged in the second mounting hole b, the second step 203 is arranged in the third mounting hole c, and the second step 203 and the third mounting hole c are interference fit; the suction valve seat 2 has a guide inner hole, and the lower part of the guide inner hole has a trumpet-shaped first guide hole 204 to achieve a converging effect, and the upper part of the first guide hole 204 has a cylindrical second guide hole 205.

[0056] The lower ends of the suction valve core 3 and the extrusion valve core 9 are distributed in a plane in the circumferential direction and are intermittently in contact and sealed with the valve seat, and the middle parts of the lower ends of the suction valve core 3 and the extrusion valve core 9 are protruding, the lower part of the suction valve core 3 is protruding in a parabolic structure 303, and the lower part of the extrusion valve core 9 is protruding in a streamlined structure. The streamlined structure of the extrusion valve core 9 includes a hemispherical structure 903 at the bottom of the valve core and an arc structure 904 on the upper part of the hemispherical structure 903.

[0057] There are planar hard seals between the suction valve core 3 and the suction valve seat 2, as well as between the extrusion valve core 9 and the extrusion valve seat 7. A first truncated cone 201 is provided on the sealing surface of the suction valve seat 2, and a second truncated cone 702 is provided on the sealing surface of the extrusion valve seat 7 to compensate for the deformation of the sealing surface caused by the collision between the valve core and the valve seat.

[0058] The suction valve spring 4 is arranged between the suction valve core 3 and the discharge valve seat 7 , and the discharge valve spring 10 is arranged between the discharge valve core 9 and the discharge valve stopper 11 .

[0059] The extrusion valve seat 7 is provided with a third step 703 and a fourth step 704, the third step 703 is arranged in the first mounting hole a, the fourth step 704 is arranged in the second mounting hole b, the second step 203 of the extrusion valve seat 7 is circumferentially provided with a first annular sealing groove 706, the first annular sealing groove 706 is used to set the first annular sealing ring 8; the oblique hedging structure of the extrusion valve seat 7 includes a plurality of evenly arranged hedging oblique holes 701, the extrusion valve seat 7 is provided with a confluence groove 705, and a plurality of evenly arranged hedging oblique holes 701 are connected to the confluence groove 705.

[0060] The drain liquid sleeve 12 is arranged between the extrusion valve seat 7 and the extrusion valve stopper 11, and plays a supporting and pressure-resistant effect, improves the stability of the extrusion valve seat 7 and the extrusion valve stopper 11, and the drain liquid sleeve 12 is circumferentially provided with flow holes, which are connected to the drain through holes.

[0061] The extrusion valve stopper 11 is provided with a fifth step 1106 and a sixth step 1103. The fifth step 1106 is circumferentially provided with a second annular sealing groove 1105, and the second annular sealing groove 1105 is used to set the second annular sealing ring 13; the top of the fifth step 1106 is higher than the upper surface of the valve body 1 to compensate for the axial dimensional deviation caused by the processing error; the cover plate 14 is arranged on the extrusion valve stopper 11 and is connected to the valve body 1 with high-strength screws.

[0062] A guide hole 1104 is also provided on the side wall of the extrusion valve stopper 11 , which penetrates the guide hole 1101 and guides the liquid in the guide hole 1101 .

[0063] An exhaust hole is provided in the second mounting hole b of the valve body 1 , and a sealing ball 15 and a sealing screw plug 16 are arranged in the exhaust hole. The sealing ball 15 is made of ceramic material.

[0064] In addition, the present invention also has the following advantages:

[0065] Both the suction valve and the discharge valve are designed with a low-friction anti-rotation structure, which adopts four spherical anti-rotation bosses 501 and four anti-rotation grooves (302 / 902) to solve the rotation problem of the valve core when it is impacted by high-speed uneven fluid, thereby reducing the sliding wear of the valve core and the valve seat at the moment of impact, and improving the sealing reliability; at the same time, the anti-rotation boss 501 is spherical and has a lower friction coefficient, which is beneficial to reducing the friction and wear between the valve core guide rod (301 / 901) and the anti-rotation ring 5 when the valve core reciprocates, thereby improving the service life of the distribution valve. At the same time, due to the reduction of friction resistance, the response speed of the distribution valve is improved.

[0066] The distribution valve adopts a flat valve structure. Compared with other types of valves such as cone valves and ball valves, the opening of the flat valve is smaller under the same flow capacity, which reduces the stroke of the valve core and helps to reduce the closing lag of the distribution valve, thereby improving the volumetric efficiency of the plunger pump.

[0067] The valve port seal is a flat hard seal, which reduces the impact stress of the valve core on the valve seat. At the same time, steps are provided on the sealing surfaces of the suction valve seat 2 and the discharge valve seat 7 to compensate for the deformation of the sealing surfaces between the valve core and the valve seat caused by impact, further improving the reliability of the seal.

[0068] The lower part of the suction valve core 3 has a parabolic structure 303, and the suction valve seat 2 has a guide hole, which reduces the vortex and flow resistance of the flow field, increases the suction capacity of the suction valve, and thus reduces the cavitation of the valve port; the lower part of the extrusion valve core 9 has a streamlined structure, which is beneficial to reducing the flow resistance of the fluid. At the same time, the extrusion valve seat 7 is provided with an oblique counter-hedge structure. The oblique counter-hedge structure cooperates with the streamlined structure, which can greatly reduce the impact of high-speed fluid on the extrusion valve core 9 and further prevent the rotation of the valve core.

[0069] An exhaust hole is provided on the side wall of the valve body 1, and a sealing ball 15 and a sealing screw plug 16 are provided in the exhaust hole; the sealing ball 15 is made of ceramic material instead of traditional stainless steel material, which improves the sealing reliability of the exhaust hole under alternating pressure load and the service life of the sealing ball 15.

[0070] The suction valve and the discharge valve are installed in the same stepped hole, which reduces the dead volume and improves the volumetric efficiency of the hydraulic pump. The suction valve and the discharge valve are both vertically assembled, and no eccentricity will occur when the valve core moves under the action of gravity. The overall structure is simple and easy to disassemble and assemble.

[0071] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An integrated high-pressure and ultra-large flow hydraulic distribution valve, characterized in that: The valve body (1) comprises a stepped groove located at the same hole center and with a hole diameter decreasing from top to bottom, the bottom of the stepped groove is connected to the liquid inlet hole (d), and a suction valve seat (2), a suction valve core (3), an extrusion valve seat (7), an extrusion valve core (9) and an extrusion valve stopper (11) are arranged in sequence upward along the bottom of the stepped groove, and the extrusion valve stopper (11) is connected to the liquid discharge hole, and a plunger cavity is arranged on the side wall of the valve body (1) between the extrusion valve seat (7) and the suction valve seat (2); A spring is provided between the extrusion valve seat (7) and the suction valve core (3), and between the extrusion valve stopper (11) and the extrusion valve core (9); The lower ends of the extrusion valve stopper (11) and the extrusion valve seat (7) are both provided with a guide hole (1101), and the upper ends of the suction valve core (3) and the extrusion valve core (9) are provided with a guide rod (301 / 901) extending to the guide hole (1101) and capable of reciprocating motion, and the guide hole (1101) is provided with an anti-rotation ring (5) for preventing the guide rod (301 / 901) from rotating; The lower ends of the suction valve core (3) and the extrusion valve core (9) are distributed in a plane in the circumferential direction and are intermittently in contact with the valve seat for sealing, and the middle parts of the lower ends of the suction valve core (3) and the extrusion valve core (9) are convex; An oblique counter-pressure structure is provided on the valve seat (7) of the extrusion valve to connect the upper and lower cavities of the valve seat (7); The stepped groove comprises a first mounting hole (a), a second mounting hole (b), and a third mounting hole (c) which are connected in sequence along the height direction starting from the upper part of the valve body (1); the first mounting hole (a) is connected to the liquid discharge through hole, the second mounting hole (b) is connected to the plunger cavity, and the third mounting hole (c) is connected to the liquid inlet through hole (d); a cover plate (14) is provided on the top of the valve body (1) to close the stepped groove; The extrusion valve seat (7) is provided with a second truncated cone (702), a first stop step (707), a third step (703) and a fourth step (704); the second truncated cone (702) is arranged in a plane and is in circumferential contact with the extrusion valve core (9); the third step (703) is arranged in the first mounting hole (a); the fourth step (704) is arranged in the second mounting hole (b); the second step (203) of the extrusion valve seat (7) is circumferentially provided with a first annular sealing groove (706); the first annular sealing groove (706) is used to arrange a first annular sealing ring (8); an intake valve spring (4) is arranged between the first stop step (707) and the intake valve core (3); the oblique hedging structure of the extrusion valve seat (7) comprises a plurality of evenly arranged hedging oblique holes (701); the extrusion valve seat (7) is provided with a confluence groove (705); the plurality of evenly arranged hedging oblique holes (701) are connected to the confluence groove (705).

2. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 1, characterized in that: An exhaust hole is provided in the second mounting hole (b) of the valve body (1), and a sealing ball (15) and a sealing screw plug (16) are arranged in the exhaust hole. The sealing ball (15) is made of a ceramic material.

3. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 2, characterized in that: The suction valve seat (2) is provided with a first truncated cone (201), a first step (202) and a second step (203); the first step (202) is arranged in the second mounting hole (b); the first truncated cone (201) is plane and in circumferential contact with the suction valve core (3); the second step (203) is arranged in the third mounting hole (c); the second step (203) and the third mounting hole (c) are in interference fit; the suction valve seat (2) has a flow guide inner hole; the lower part of the flow guide inner hole has a trumpet-shaped first flow guide hole (204) to achieve a converging effect; the upper part of the first flow guide hole (204) has a cylindrical second flow guide hole (205).

4. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 1, characterized in that: The lower part of the suction valve core (3) protrudes into a parabolic structure (303), and the lower part of the extrusion valve core (9) protrudes into a streamlined structure. The streamlined structure of the extrusion valve core (9) includes a hemispherical structure (903) at the bottom of the core and an arc-shaped structure (904) above the hemispherical structure (903).

5. The integrated high-pressure and ultra-large-flow hydraulic distributing valve according to claim 1, characterized in that: The extrusion valve stopper (11) is provided with a second stop step (1102), a fifth step (1106) and a sixth step (1103); an extrusion valve spring (10) is provided between the second stop step (1102) and the valve core (9) of the extrusion valve; a second annular sealing groove (1105) is circumferentially provided on the fifth step (1106); the second annular sealing groove (1105) is used to provide a second annular sealing ring (13); the top of the fifth step (1106) is higher than the upper surface of the valve body (1); a guide hole (1104) is also provided on the side wall of the extrusion valve stopper (11) and is connected to the guide hole (1101) and guides the liquid in the guide hole (1101); and a cover plate (14) is provided on the extrusion valve stopper (11).

6. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 1, characterized in that: A pressure ring (6) and an anti-rotation ring (5) are also provided in the guide hole (1101); the pressure ring (6) is fitted on the inner top wall of the guide hole (1101); the anti-rotation ring (5) is nested in the guide hole (1101) and is matched with the gap of the guide rod (301 / 901); a plurality of evenly distributed spherical anti-rotation bosses (501) are provided on the upper part of the inner hole of the anti-rotation ring (5); and a plurality of anti-rotation grooves (302 / 902) matched with the anti-rotation bosses (501) are provided on the upper part of the guide rod (301 / 901).

7. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 6, characterized in that: The material of the anti-rotation ring (5) is a corrosion-resistant and wear-resistant alloy, and the material of the valve core is high-strength stainless steel.

8. An integrated high-pressure and ultra-large-flow hydraulic distributing valve as claimed in claim 1, characterized in that: A hydraulic discharge sleeve (12) is provided between the extrusion valve seat (7) and the extrusion valve stopper (11), and the hydraulic discharge sleeve (12) is provided with flow holes corresponding to the liquid discharge through holes in a circumferential direction.

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