CN217462709U - Push combined valve - Google Patents

Abstract

The utility model discloses a pass combination valve, including valve body, one-way case subassembly and overflow case subassembly, set up in the valve body and hold the first valve pocket of one-way case subassembly, hold the second valve chamber of overflow case subassembly and with first valve pocket intercommunication first inlet channel, second inlet channel and first liquid outlet channel, first liquid outlet channel and second valve pocket intercommunication. The utility model discloses a pass combination valve, the integrated level is high, reduces the rubber tube quantity that the colliery is fully mechanized and is adopted hydraulic support system needs, improves space utilization, can with pass jack lug connection for the structure is compacter, and the lift action is more direct.

Description

Push combined valve

Technical Field

The utility model belongs to the technical field of the colliery is fully mechanized and is adopted hydraulic support, specifically speaking, the utility model relates to a be suitable for colliery to fully mechanized and adopt hydraulic support's pass combination valve.

Background

At present, traditional pipe type connection is adopted for the pushing jack for the domestic large mining height bracket, the pipeline arrangement is complex, and particularly, a high-pressure rubber pipe in a narrow environment space is difficult to connect a one-way lock and the pushing jack, so that the pipeline arrangement and the space utilization rate are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a pass combination valve, the purpose realize with the colliery combine to adopt hydraulic support's pass jack directly to be connected, reduce hydraulic line's setting, improve space utilization.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the push combined valve comprises a valve body, a one-way valve core assembly and an overflow valve core assembly, wherein a first valve cavity for accommodating the one-way valve core assembly, a second valve cavity for accommodating the overflow valve core assembly, a first liquid inlet channel, a second liquid inlet channel and a first liquid outlet channel are arranged in the valve body, and the first liquid outlet channel is communicated with the second valve cavity.

The one-way valve element assembly comprises a first threaded sleeve, a first liquid inlet valve sleeve, a liquid outlet valve sleeve, a valve seat arranged between the first liquid inlet valve sleeve and the liquid outlet valve sleeve, a mandril arranged movably, a first small valve element arranged movably, a big valve element arranged in the liquid outlet valve sleeve and sleeved on the first small valve element movably, a first spring applying elastic acting force to the mandril and a second spring applying elastic acting force to the first small valve element, wherein the second spring pushes the first small valve element to enable the head of the valve element to extend out of the big valve element, and the big valve element is connected with the valve seat in a sealing mode.

One end of the first liquid inlet valve sleeve is in threaded connection with the first threaded sleeve, and the other end of the first liquid inlet valve sleeve is in threaded connection with the liquid outlet valve sleeve.

The liquid inlet valve is characterized in that a liquid inlet hole is formed in the first screw sleeve, an unloading cavity and a guide hole used for guiding the ejector rod are formed in the first liquid inlet valve sleeve, the head of the ejector rod extends into the unloading cavity of the first liquid inlet valve sleeve, and the tail of the ejector rod is located in the first screw sleeve.

The head of the big valve core is of a frustum structure, and the ejector rod and the big valve core start to contact at the port of the valve seat.

The big valve core is in hard sealing connection with the valve seat.

The overflow valve core assembly comprises a valve casing connected with the valve body, a second valve core capable of being movably arranged, a second thread sleeve arranged inside the valve body and sleeved on the second valve core, a flow guide spring seat movably arranged inside the valve casing, a pressure regulating screw arranged inside the valve casing and a reset spring arranged between the flow guide spring seat and the pressure regulating screw.

The relief valve core assembly further comprises a sealing assembly arranged between the second valve core and the second threaded sleeve.

The sealing assembly comprises an inner sealing ring sleeved on the second valve core and an outer sealing ring sleeved on the inner sealing ring.

The utility model discloses a pass combination valve, the integrated level is high, reduces the rubber tube quantity that the colliery is fully mechanized and is adopted hydraulic support system needs, improves space utilization, can with pass jack lug connection, reduces hydraulic line's setting for the structure is compacter, and the lift action is more direct, passes combination valve moreover and passes and not use the rubber tube connection between the jack, can slow down hydraulic system's resistance loss.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a front view of the push combined valve of the present invention;

FIG. 2 is a top view of the push combined valve of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 1;

FIG. 5 is a front view of the valve body;

FIG. 6 is a top view of the valve body;

FIG. 7 is a bottom view of the valve body;

FIG. 8 is a left side view of the valve body;

FIG. 9 is a sectional view A-A of FIG. 5;

FIG. 10 is a cross-sectional view B-B of FIG. 5;

FIG. 11 is a cross-sectional view C-C of FIG. 7;

FIG. 12 is a cross-sectional view taken along line D-D of FIG. 6;

FIG. 13 is a cross-sectional view of the check valve cartridge assembly;

FIG. 14 is a cross-sectional view of the overflow spool assembly;

FIG. 15 is a cross-sectional view of a deflector spring seat;

FIG. 16 is a cross-sectional view of a pressure adjustment screw;

fig. 17 is a sectional view of the outlet valve sleeve;

FIG. 18 is a functional symbol of the push combination valve of the present invention;

labeled as: 1. a valve body; 2. a first liquid inlet channel; 3. a second liquid inlet channel; 4. a first liquid outlet channel; 5. a first threaded sleeve; 6. a first liquid inlet valve pocket; 7. a liquid outlet valve sleeve; 701. a first liquid outlet section; 702. a second liquid outlet section; 703. a communicating hole; 8. a valve seat; 9. a top rod; 10. a first small valve core; 11. a large valve core; 12. a first spring; 13. a second spring; 14. a valve housing; 15. a second valve core; 16. a second thread insert; 17. a diversion spring seat; 1701. a first boss; 1702. a first guide section; 1703. a second boss; 18. a pressure regulating screw; 1801. a third boss; 1802. a second guide section; 19. a return spring; 20. an inner seal ring; 21. an outer sealing ring; 22. an unloading cavity; 23. a third liquid passing hole; 24. a fourth liquid passing hole; 25. a fifth liquid passing hole; 26. a sixth liquid passing hole; 27. a seventh liquid passing hole; 28. an eighth liquid passing hole; 29. a first liquid passing hole; 30. a second liquid passing hole; 31. and a third liquid passing hole.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

As shown in fig. 1 to 18, the utility model provides a pass combination valve, including valve body 1, one-way case subassembly and overflow case subassembly, set up in the valve body 1 and hold the first valve pocket of one-way case subassembly, hold the second valve pocket of overflow case subassembly and with first inlet channel 2, second inlet channel 3 and the first liquid outlet channel 4 of first valve pocket intercommunication, first liquid outlet channel 4 and second valve pocket intercommunication.

Specifically, as shown in fig. 1 to 12 and 18, the first valve chamber and the second valve chamber are circular chambers provided inside the valve body 1, and the axis of the first valve chamber is parallel to the axis of the second valve chamber. The valve body 1 is provided with an A working port, a B working port, a C working port, a PA working port, a PB working port and a PC working port, the A working port, the B working port and the C working port are arranged on a first surface of the valve body 1, the PA working port, the PB working port and the PC working port are arranged on a second surface of the valve body 1, the first surface is perpendicular to the second surface, and the axis of the first valve cavity is parallel to the axis of the second valve cavity and perpendicular to the first surface. PA working port, PB working port and PC working port are used for being connected with the outside switching-over valve that sets up, and PB working port and first inlet channel 2 intercommunication, A working port and second inlet channel 3 intercommunication, and B working port and first outlet channel 4 intercommunication. After the pushing combination valve is connected into a hydraulic system of a fully mechanized mining hydraulic support of a coal mine, the working port A and the working port C are connected with a rodless cavity of a pushing jack in the hydraulic system, the working port B is connected with a rod cavity of the pushing jack, the working port PA is communicated with the working port A through an oil duct arranged inside the valve body, and the working port PC is communicated with the working port C through an oil duct arranged inside the valve body. The pushing jack is a single-piston-rod hydraulic cylinder and can extend and contract. The valve body 1 is directly used for being connected with an external pushing jack, the valve body 1 is installed on the pushing jack through a bolt, and the outer surface of the valve body 1 is in contact with the pushing jack. The combined valve integrates the check valve and the overflow valve into a whole, integrates the functions of the check valve and the overflow valve, can reduce the number of rubber pipes required by a traditional system, improves the space utilization rate, is directly connected with the valve and the jack, has a more compact structure, leads the telescopic action of the pushing jack to be more direct, and simultaneously slows down the resistance loss of a hydraulic system because no rubber pipe is used.

As shown in fig. 4 and 13, the one-way valve core assembly includes a first threaded sleeve 5, a first liquid inlet valve sleeve 6, a liquid outlet valve sleeve 7, a valve seat disposed between the first liquid inlet valve sleeve 6 and the liquid outlet valve sleeve 7, a movably disposed push rod, a movably disposed first small valve core, a large valve core disposed in the liquid outlet valve sleeve 7 and sleeved on the first small valve core and movable, a first spring applying an elastic force to the push rod, and a second spring applying an elastic force to the first small valve core, wherein the second spring pushes the first small valve core to enable a head of the valve core to extend out of the large valve core, and the large valve core is connected to the valve seat in a sealing manner. The first liquid inlet valve sleeve 6 is located between the first threaded sleeve 5 and the liquid outlet valve sleeve 7, the valve seat 8 is arranged inside the first liquid inlet valve sleeve 6, the valve seat 8 is matched with the big valve element 11 to realize sealing, the big valve element 11 is provided with a sealing surface used for being in contact with the valve seat 8, and the sealing surface is a conical surface. The first screw sleeve 5 and the first liquid inlet valve sleeve 6 are sleeved on the ejector rod 9, the large valve core 11 is movably arranged in the liquid outlet valve sleeve 7, the first small valve core 10 is movably arranged in the large valve core 11, the ejector rod 9 is used for applying axial pressure to the large valve core 11 and the small valve core 10, the ejector rod 9 can push the large valve core 11 to move towards the inside of the liquid outlet valve sleeve 7 and push the first small valve core 10 to move in the direction away from the first liquid inlet valve sleeve 6 in the inside of the large valve core 11, the large valve core 11 is separated from the valve seat 8, and the opening of the one-way valve core assembly is achieved. The first screw sleeve 5 is in threaded connection with the valve body 1, the first liquid inlet valve sleeve 6 is clamped between the first screw sleeve 5 and the liquid outlet valve sleeve 7, the first liquid inlet valve sleeve 6 is fixedly connected with the first screw sleeve 5 and the liquid outlet valve sleeve 7, and the first screw sleeve 5 is used for limiting the ejector rod 9 in the axial direction.

The first valve cavity is a circular cavity formed by extending from one end face of the valve body 1 to the inside of the valve body 1, the one-way valve core assembly is integrally inserted into the valve cavity of the valve body 1, and the first threaded sleeve 5 is in threaded connection with the valve body 1, so that the valve core assembly is fixed on the valve body 1. The first valve cavity is provided with an opening on the end face of one end of the valve body 1, the opening is a first opening, the one-way valve core assembly is inserted into the first valve cavity at the first opening, and the one-way valve core assembly is inserted into the valve cavity and is in threaded connection with the valve body 1, so that the valve body is convenient to disassemble, assemble and maintain. The first opening is closed by the first threaded sleeve 5, the liquid outlet valve sleeve 7 is inserted into the first valve cavity, and one end face of the liquid outlet valve sleeve 7 is attached to the inner wall face of the first valve cavity.

As shown in fig. 4 and 13, the valve seat 8 is provided inside the first liquid inlet valve sleeve 6, and the valve seat 8 is clamped and fixed in the axial direction by the first liquid inlet valve sleeve 6 and the valve sleeve 4. The valve seat 8 is of a circular structure, the valve seat 8, the first liquid inlet valve sleeve 6 and the liquid outlet valve sleeve 7 are coaxially arranged, a central hole for accommodating the large valve core 11 is formed in the center of the interior of the valve seat 8, and the diameter of the central hole of the valve seat 8 is smaller than the outer diameter of the large valve core 11. The big valve core 9 and the valve seat 8 are both made of metal materials, the big valve core 11 and the valve seat 8 are made of the same materials, the hardness of the valve seat 8 is smaller than that of the big valve core 11, and the big valve core 11 and the valve seat 8 are in hard sealing connection, so that the sealing performance is enhanced. The large valve core 11 and the valve seat 8 are made of metal materials, the materials are preferably 3Cr13, a vacuum quenching technology is adopted, fine grinding is carried out after quenching, the hardness is high, and compared with sealing of soft materials, hard sealing is good in sealing performance, resistant to ultrahigh pressure and long in service life of the hydraulic control one-way valve. The sealing end of the big valve core 11 is of a frustum structure, the sealing surface of the big valve core 11 is a conical surface, the sealing end of the big valve core 11 can extend into the central hole of the valve seat 8 and contact with the valve seat 8 to realize sealing, the ejector rod 9 and the big valve core 11 only start to contact at the valve seat 8, the structure of the big valve core 11 is simpler, and the whole structure of the hydraulic control check valve is more compact. The first small spool 10 is also made of a metal material, and the valve seat 8, the large spool 11, and the first small spool 10 are made of the same material.

As shown in fig. 4 and 13, the push rod 9 is movably disposed inside the first screw sleeve 5 and the first liquid inlet valve sleeve 6, the first liquid inlet valve sleeve 6 is a cylinder with two open ends and a hollow interior, one end of the first screw sleeve 5 is in threaded connection with the first screw sleeve 5, the other end of the first liquid inlet valve sleeve 6 is inserted into the liquid outlet valve sleeve 7, the first liquid inlet valve sleeve 6 is in threaded connection with the liquid outlet valve sleeve 7, one end of the first liquid inlet valve sleeve 6 is provided with an external thread, the other end of the first liquid inlet valve sleeve 6 is provided with an internal thread, the end of the liquid outlet valve sleeve 7 is provided with an internal thread, and the end of the first screw sleeve 5 is provided with an external thread. An unloading cavity 22 and a guide hole for guiding the ejector rod are arranged in the first liquid inlet valve sleeve 6, the head of the ejector rod extends into the unloading cavity 22 of the first liquid inlet valve sleeve 6, and the tail of the ejector rod is located in the first threaded sleeve 5. The first liquid inlet valve sleeve 6 is provided with a first liquid passing hole 29 for liquid to pass through, the first liquid passing hole 29 is obliquely arranged on the first liquid inlet valve sleeve 6, and an included angle is formed between the axis of the first liquid passing hole 29 and the axis of the first liquid inlet valve sleeve 6 and is an acute angle. First liquid hole 29 of crossing is for the round hole that runs through the setting on the lateral wall of first feed liquor valve barrel 6, and first liquid hole 29 of crossing is a plurality of along circumference equipartition on the lateral wall of first feed liquor valve barrel 6, and first liquid hole 29 of crossing communicates with the cavity inner chamber of first feed liquor valve barrel 6 and all first liquid holes 29 of crossing distribute around the cavity inner chamber, and first liquid hole 29 of crossing is linked together with the first inlet channel 2 that sets up in the valve body 1. The first liquid passing hole 29 extends obliquely at the position of the outward valve seat 8 on the side wall of the first liquid inlet valve sleeve 6, the axis of the first liquid passing hole 29 is intersected with the axis of the first liquid inlet valve sleeve 6, and the included angle between the axis and the axis is smaller than 90 degrees. The first liquid passing hole 29 is designed to be an inclined hole, so that liquid can flow more smoothly when passing through the first liquid passing hole 29, resistance loss is less, and the processing is easier.

As shown in fig. 4 and 13, the first thread insert 5 is a cylinder with an open end and a closed end, and the interior of the cylinder is hollow, the first thread insert 5 is inserted into the valve body 1 and is in threaded connection with the valve body 1, the first thread insert 5 is provided with external threads, and the inner circular surface of the valve cavity of the valve body 1 is provided with internal threads. Set up a feed liquor hole on the first swivel nut 5, the round hole that the feed liquor hole runs through the setting on the lateral wall of first swivel nut 5, and the feed liquor hole is linked together with second inlet channel 3, and the feed liquor hole is arranged in guiding the interior cavity of first swivel nut 5 with the fluid from second inlet channel 3, and then can promote the ejector pin and remove.

As shown in fig. 4 and 13, the liquid outlet valve sleeve 7 is provided with a second liquid passing hole 30 for passing the liquid, the second liquid passing hole 30 is obliquely arranged on the liquid outlet valve sleeve 7, and an included angle is formed between the axis of the second liquid passing hole 30 and the axis of the liquid outlet valve sleeve 7 and is an acute angle. The second liquid passing holes 30 are round holes penetrating through the side wall of the liquid outlet valve sleeve 7, the second liquid passing holes 30 are arranged in a plurality and are uniformly distributed on the side wall of the liquid outlet valve sleeve 7 along the circumferential direction, all the second liquid passing holes 30 are distributed around the large valve core 11 and can be communicated with the hollow inner cavity of the liquid outlet valve sleeve 7, and the second liquid passing holes 30 are communicated with the first liquid outlet channel 4 arranged in the valve body 1. The second liquid passing hole 30 extends obliquely in the side wall of the liquid outlet valve sleeve 7, the axis of the second liquid passing hole 30 is intersected with the axis of the liquid outlet valve sleeve 7, and the included angle between the two is smaller than 90 degrees. The second liquid passing hole 30 is designed to be an inclined hole, so that liquid can flow more smoothly when passing through the second liquid passing hole 30, resistance loss is less, and the processing is easier. An included angle is formed between the axis of the first liquid passing hole 29 and the axis of the second liquid passing hole 30 in the same axial direction, the included angle is also an acute angle, and the axis of the first liquid passing hole 29 and the axis of the second liquid passing hole 30 in the same axial direction are arranged in a V shape.

As shown in fig. 4, 13 and 17, the liquid outlet valve sleeve 7 is provided with a third liquid passing hole 31 for passing the liquid, the third liquid passing hole 31 is obliquely arranged on the liquid outlet valve sleeve 7, and an included angle is formed between an axis of the third liquid passing hole 31 and an axis of the liquid outlet valve sleeve 7 and is an acute angle. The third liquid passing holes 31 are round holes penetrating through the side wall of the liquid outlet valve sleeve 7, the third liquid passing holes 31 are arranged in a plurality and all the third liquid passing holes 31 are uniformly distributed on the side wall of the liquid outlet valve sleeve 7 along the circumferential direction, all the third liquid passing holes 31 are arranged at the tail of the liquid outlet valve sleeve 7, the head of the liquid outlet valve sleeve 7 is connected with the first liquid inlet valve sleeve 6, and the third liquid passing holes 31 are communicated with the first liquid outlet channel 4 arranged in the valve body 1. The third liquid passing hole 31 extends obliquely in the side wall of the liquid outlet valve sleeve 7, the axis of the third liquid passing hole 31 intersects with the axis of the liquid outlet valve sleeve 7, and the included angle between the axis of the third liquid passing hole and the axis of the liquid outlet valve sleeve 7 is smaller than 90 degrees. The third liquid passing hole 31 is designed to be an inclined hole, so that liquid can flow more smoothly when passing through the third liquid passing hole 31, resistance loss is less, and the processing is easier. An included angle is formed between the axis of the second liquid passing hole 30 and the axis of the third liquid passing hole 31 in the same axial direction, the included angle is also an acute angle, the axis of the second liquid passing hole 30 and the third liquid passing hole 31 in the same axial direction are arranged in a V shape, and in the axial direction of the one-way valve core assembly, the second liquid passing hole 30 is located between the first liquid passing hole 29 and the third liquid passing hole 31.

As shown in fig. 4, 13 and 17, the liquid outlet valve sleeve 7 includes a connection section connected to the first liquid inlet valve sleeve 6, a first liquid outlet section 701 for guiding the large valve core 11, and a second liquid outlet section 702 connected to the first liquid outlet section 701, the connection section, the first liquid outlet section 701 and the second liquid outlet section 702 are sequentially arranged along the axial direction of the liquid outlet valve sleeve 7 and fixedly connected in sequence, that is, the liquid outlet valve sleeve 7 is formed by connecting the connection section, the first liquid outlet section 701 and the second liquid outlet section 702, the connection section is a circular ring structure, the first liquid outlet section 701 is a cylinder with an open end and a closed end, the interior of the cylinder is hollow, the connection section, the first liquid outlet section 701 and the second liquid outlet section 702 are coaxially arranged, the connection section is fixedly connected to the open end of the first liquid outlet section 701, the closed end of the first liquid outlet section 701 is fixedly connected to the second liquid outlet section 702, the outer diameter of the connection section is larger than the outer diameter of the first liquid outlet section 701, the inner diameter of the connecting section is larger than that of the first liquid outlet section 701. The first liquid inlet valve sleeve 6 is inserted into the central hole of the connecting section and is in threaded connection with the connecting section, internal threads are arranged on the inner wall surface of the connecting section, and the inner diameter of the connecting section is the diameter of the central hole. The large valve core 11 is inserted into the center hole of the first liquid outlet section 701, the outer diameter of the large valve core 11 is equal to the diameter of the center hole of the first liquid outlet section 701, and the inner diameter of the first liquid outlet section 701 is the diameter of the center hole. The central hole of the first liquid outlet section 701 forms a guide cavity for accommodating the large valve core 11, the guide cavity is a circular cavity body located at the center of the interior of the valve sleeve, and the length of the guide cavity is greater than that of the large valve core 11. The big valve core 11 is used for controlling the opening and closing of the second liquid passing hole 30, the second liquid passing hole 30 is a circular hole penetrating through the side wall of the first liquid outlet section 701, the third liquid passing hole 31 is a circular hole penetrating through the side wall of the second liquid outlet section 702, the end face of the closed end of the second liquid outlet section 702 is provided with a communicating hole 703, the communicating hole 703 is used for communicating the central hole of the second liquid outlet section 702 with the central hole of the second liquid outlet section 702, the central hole of the second liquid outlet section 702 is a conical hole, the third liquid passing hole 31 extends from the outer circular face of the second liquid outlet section 702 to the inner circular face of the second liquid outlet section 702, the outer circular face and the inner circular face of the second liquid outlet section 702 are conical faces and the outer circular face and the inner circular face are coaxial, the formed second liquid outlet section 702 is of a hollow conical frustum structure, the small diameter end of the second liquid outlet section 702 is fixedly connected with the first liquid outlet section 701, the end face of the large diameter end of the second liquid outlet section 702 is in contact with the inner wall face of the valve cavity of the first liquid outlet section 701, the small diameter end and the large diameter end of the second liquid outlet section 702 are opposite ends of the second liquid outlet section 702 in the axial direction, and the diameter of the large diameter end is larger than that of the small diameter end. The third liquid passing hole 31 is always in an open state, and the third liquid passing hole 31 is communicated with the working port B through the first liquid outlet channel 4. In the liquid outlet valve sleeve 7 with the above structure, the third liquid passing hole 31 is communicated with the inner cavity of the liquid outlet valve sleeve through the communicating hole 703, the second spring 13 is located in the inner cavity of the liquid outlet valve sleeve, when the second spring 13 is compressed, oil in the inner cavity of the liquid outlet valve sleeve flows to the third liquid passing hole 31 through the communicating hole 703 and then flows to the first liquid outlet channel 4, the liquid passing area of the liquid can be increased by arranging the cooperation of the third liquid passing hole 31 and the communicating hole, the spring can be protected, the liquid passing hole is not arranged on the side wall of the liquid outlet valve sleeve outside the third spring, the third spring cannot be bent and clamped in the liquid passing hole arranged on the side wall of the liquid outlet valve sleeve during reciprocating motion, the situation of spring breakage is caused, the third spring is not easy to break, the damage of the one-way valve is not easy to cause, and the reliability is improved.

As shown in fig. 4 and 13, the large valve element 11 is a cylinder with two open ends and a hollow interior, one end of the large valve element 11 is a sealing end for contacting with the valve seat 8, an outer circular surface of the sealing end is a conical surface, and the conical surface is used as a sealing surface on the large valve element 11 for contacting with the valve seat 8 to realize sealing. The inside of big case 11 is for holding the hollow cavity of first little case 10, and little case 10 is the cylinder, and first little case 10 has the sealing and is equipped with the sealing face that is used for realizing sealed with big case 11 contact on the lateral surface of this sealing, and the sealing face of first little case 10 is the circular conical surface, and the sealing is for setting up on the lateral wall of first little case 10 and outwards outstanding complete annular structure, and the sealing is coaxial and the sealing is located the hollow cavity 902 of big case 11 with big case 11. The first small valve core 10 and the big valve core 11 are matched to realize sealing, the first small valve core 10 and the big valve core 11 are connected in a hard sealing mode, the sealing effect is good after the one-way valve is closed, and the reliability is high. A second spring 13 is arranged between the first liquid outlet section 701 and the first small valve core 10, the second spring 13 is used for applying an acting force to the first small valve core 10 to enable the first small valve core 10 to move in a direction away from the closed end of the first liquid outlet section 701 along the axial direction, the second spring 13 pushes the large valve core 11 to move towards the valve seat 8 through the first small valve core 10 until the large valve core 11 is contacted with the valve seat 8 to realize sealing, the second spring 13 is positioned in a central hole of the first liquid outlet section 701 and clamped between the inner wall surface of the first liquid outlet section 701 and the first small valve core 10, one end of the second spring 13 is inserted into a first positioning hole arranged in the first liquid outlet section 701, the other end of the second spring 13 is inserted into a second positioning hole arranged in the first small valve core 10, the first positioning hole is a circular hole arranged on the end surface of the closed end of the first liquid outlet section 701, and the second positioning hole is a circular hole arranged in the first small valve core 10, the axes of the first positioning hole and the second positioning hole are in the same straight line with the axis of the liquid outlet valve sleeve 7, the second spring 13 is a cylindrical spiral spring, the diameters of the first positioning hole and the second positioning hole are approximately equal to the outer diameter of the second spring 13, the second spring 13 can be positioned through the positioning holes, the reliability is improved, and the second spring 13 is prevented from bending and deforming. After the sealing surface of the first small valve core 10 is separated from the large valve core 11, the central hole of the first liquid outlet section 701 is communicated with the unloading cavity 22 of the first liquid inlet valve sleeve 6 through the gap between the first small valve core 10 and the large valve core 11. After the sealing surface of the first small valve core 10 contacts with the large valve core 11, the unloading cavity 22 of the first liquid outlet section 701 is separated from the gap between the first small valve core 10 and the large valve core 11 by the sealing part on the first small valve core 10, so that the central hole of the first liquid outlet section 701 is not communicated with the unloading cavity 22 of the first liquid inlet valve sleeve 6. When the pushing jack contracts, the PB working port feeds liquid, the ejector rod 9 pushes the large valve core 11 and the first small valve core 10 to move towards the direction far away from the valve seat 8, the large valve core 11 is separated from the valve seat 8, the opening of the one-way valve core assembly is realized, liquid flowing into the one-way valve core assembly sequentially flows into the first liquid outlet channel 4 through the first liquid passing hole 29 and the second liquid passing hole 30, and finally enters the rod cavity of the pushing jack through the B working port, so that the contraction action of the pushing jack is realized. The PA working port or the PC working port is used for feeding liquid to control the one-way valve to unlock, the opening of the one-way valve element assembly is realized after the big valve element 11 is separated from the valve seat 8, the liquid of the B working port returns to the reversing valve from the PB working port, the A working port is connected with the C working port through a rodless cavity of the pushing jack, and the liquid enters the rodless cavity of the pushing jack through the A working port or the C working port to realize the extension action of the pushing jack.

As shown in fig. 4 and 14, the relief valve core assembly includes a valve casing 14 connected to the valve body 1, a second valve core 15 movably disposed, a second thread sleeve 16 disposed inside the valve body 1 and sleeved on the second valve core 15, a diversion spring seat 17 movably disposed inside the valve casing 14, a pressure regulating screw 18 disposed inside the valve casing 14, and a return spring 19 disposed between the diversion spring seat 17 and the pressure regulating screw 18. The overflow channel of the overflow valve core assembly comprises a third liquid passing hole 23 arranged on the second valve core 15, a fourth liquid passing hole 24 and a fifth liquid passing hole 25 arranged on the second threaded sleeve 16, a sixth liquid passing hole 26 and a seventh liquid passing hole 27 arranged on the flow guide spring seat 17, and an eighth liquid passing hole 28 arranged on the pressure regulating screw 18, wherein the fifth liquid passing hole 25 is provided with a plurality of and all the fifth liquid passing holes 25 are distributed around the axis of the second threaded sleeve 16, and the sixth liquid passing hole 26 is provided with a plurality of and all the sixth liquid passing holes 26 are distributed around the axis of the flow guide spring seat 17. The pressure regulating screw 18 is used for leaking oil. After the relief valve core assembly is opened, the emulsion flows to the pressure regulating screw 18 through the relief channel and is discharged outwards through the eighth liquid passing hole 28, and the unloading mode has the advantages of large liquid flow area, larger and more direct flow, small resistance loss and capability of meeting the overflow requirement of a large-flow safety valve.

The third liquid passing hole 23 is communicated with the first liquid outlet channel 4, in the process of opening the overflow valve core assembly, the second valve core 15 pushes the flow guide spring seat 17 to move towards a position close to the pressure regulating screw 18 until the second valve core 15 moves to a position where the third liquid passing hole 23 is aligned with the fourth liquid passing hole 24 on the second screw sleeve 16, emulsion entering the central hole of the second valve core 15 sequentially enters the inner cavity of the valve casing 14 through the third liquid passing hole 23, the fourth liquid passing hole 24, the fifth liquid passing hole 25, the sixth liquid passing hole 26 and the seventh liquid passing hole 27, the emulsion entering the inner cavity of the valve casing 14 is discharged outwards through the eighth liquid passing hole 28, and finally flows into an external oil tank, so that the recovery of the emulsion is realized.

As shown in fig. 4 and 14, the valve housing 14 is a cylindrical member having both ends open and a hollow interior, the valve housing 14 is inserted into the second valve chamber, and the valve housing 14 is screwed to the valve body 1. The pressure regulating screw 18, the reset spring 19 and the flow guide spring seat 17 form a reset mechanism for pushing the second valve core 15 to move to close the overflow valve core assembly, the pressure regulating screw 18, the reset spring 19 and the flow guide spring seat 17 are located in an inner cavity of the valve casing 14, the reset spring 19 is clamped between the pressure regulating screw 18 and the flow guide spring seat 17, the flow guide spring seat 17 is pushed by the reset spring 19 and the second valve core 15 in the valve casing 14 to slide along the axial direction, the second valve core 15 pushes the flow guide spring seat 17 to move towards the pressure regulating screw 18 to open the overflow valve, and the reset spring 19 pushes the flow guide spring seat 17 to move towards the valve seat to close the overflow valve.

As shown in fig. 4 and 14, the second valve core 15 is a cylinder, the second valve core 15 is movably disposed along the axial direction, the second valve core 15 and the valve body 1 are coaxially disposed, the third liquid passing hole 23 is a through hole radially penetrating through a circular side wall of the second valve core 15 surrounding the second liquid inlet hole 203, the third liquid passing hole 23 is a circular hole, and an axis of the third liquid passing hole 23 is perpendicular to an axis of the second liquid inlet hole 203. The second valve core 15 further has an eighth liquid passing hole 202, the eighth liquid passing hole 202 is a through hole radially penetrating through the circular side wall of the second valve core 15 surrounding the second liquid inlet hole 203, the eighth liquid passing hole 202 is a circular hole, the axis of the eighth liquid passing hole 202 is perpendicular to the axis of the second liquid inlet hole 203, and the third liquid passing hole 23 and the eighth liquid passing hole 202 are communicated with the second liquid inlet hole 203. The third liquid passing hole 23 is positioned on the second valve core 15 near the open end of the second valve core 15, and the eighth liquid passing hole 202 is positioned on the second valve core 15 near the closed end of the second valve core 15.

As shown in fig. 4 and 14, the second screw 16 is a cylindrical member having both ends opened and having a hollow interior, the second screw 16 is fitted over the second valve body 15, the second screw 16 is screwed to the valve housing 14 at one end of the valve housing 14, the pressure adjusting screw 18 is screwed to the valve housing 14 at the other end of the valve housing 14, and the second screw 16 is coaxially disposed with the second valve body 15, the pilot spring seat 17, and the pressure adjusting screw 18. Second swivel nut 16 is threaded connection with valve casing 14, makes things convenient for the dismouting, and is corresponding, sets up the external screw thread on the outer disc of second swivel nut 16, sets up the internal thread on the interior disc of valve casing 14. The second spool 15 passes through a center hole of the second nut 16, and the length of the second nut 16 is smaller than that of the second spool 15. The second screw sleeve 16 is provided with a fourth liquid passing hole 24 and a fifth liquid passing hole 25, the fourth liquid passing hole 24 is a circular groove extending in the whole circumferential direction on the inner circumferential surface of the second screw sleeve 16, the axis of the fifth liquid passing hole 25 is parallel to the axis of the second screw sleeve 16, and all the fifth liquid passing holes 25 are uniformly distributed on the second screw sleeve 16 in the circumferential direction by taking the axis of the second screw sleeve 16 as a center line. When the oil pressure entering the second valve cavity reaches the opening pressure of the overflow valve, the emulsion pushes the second valve core 15 to move axially, after the third liquid passing hole 23 is aligned with the fourth liquid passing hole 24, the third liquid passing hole 23 is communicated with the fourth liquid passing hole 24, the overflow valve is opened, the emulsion entering the second valve cavity enters the third liquid passing hole 23 and then flows to the fifth liquid passing hole 25 through the fourth liquid passing hole 24 in sequence, then the emulsion enters the inner cavity of the valve shell 14 through the sixth liquid passing hole 26 and the seventh liquid passing hole 27 in sequence, and the emulsion entering the inner cavity of the valve shell 14 flows into the external oil tank through the eighth liquid passing hole 28. Set up a plurality of fifth liquid holes 25, improve the off-load ability of overflow valve, emulsion flows through and flows to valve casing 14 inside behind the fifth liquid hole 25, and this kind of off-load mode liquid flow area is big, and the flow is bigger more direct, and the resistance loss is little to can satisfy the overflow requirement of large-traffic overflow valve.

As shown in fig. 14 and 15, an included angle is formed between the axis of the sixth liquid passing hole 26 and the axis of the diversion spring seat 17, and the included angle is an acute angle, that is, the sixth liquid passing hole 26 adopts an inclined hole design, so that the liquid flows out more smoothly, the resistance loss is less, and the processing is easy. All the sixth liquid passing holes 26 are uniformly distributed on the guide spring seat 17 along the circumferential direction by taking the axis of the guide spring seat 17 as a central line. One seventh liquid passing hole 27 is formed, the seventh liquid passing hole 27 is formed in the center of the guide spring seat 17, and the seventh liquid passing hole 27 is communicated with all the sixth liquid passing holes 26. The valve housing 14 is a cylindrical member with both ends open and an inner hollow, and the sixth liquid passing hole 26 and the seventh liquid passing hole 27 communicate with an inner cavity of the valve housing 14. The sixth liquid passing hole 26 is opened in the end surface of the guide spring seat 17 facing the second threaded sleeve 16, the seventh liquid passing hole 27 is opened in the end surface of the guide spring seat 17 facing the pressure adjusting screw 18, and the sixth liquid passing hole 26 receives the emulsion from the fifth liquid passing hole 25 and guides the emulsion to the seventh liquid passing hole 27. The sixth liquid passing hole 26 is provided with a first end and a second end, the first end and the second end are two opposite ends of the sixth liquid passing hole 26 in the axial direction, the vertical distance between the first end of the sixth liquid passing hole 26 and the pressure regulating screw 18 is larger than that between the second end and the pressure regulating screw 18, and the vertical distance between the first end of the sixth liquid passing hole 26 and the axis of the diversion spring seat 17 is larger than that between the second end and the axis of the diversion spring seat 17. Also, the number of the fifth liquid passing holes 25 is greater than the number of the sixth liquid passing holes 26.

As shown in fig. 15 and 16, the flow guide spring seat 17 is a flow guide spring seat 17 formed by a first guide section 1702, a first boss 1701, and a second boss 1703, wherein the first guide section 1702 is a circular block-shaped structure, and the first boss 1701 and the second boss 1703 are respectively connected with the first guide section 1702 at one side of the first guide section 1702 to form an integral structure. The first and second bosses 1701, 1703 are coaxial with the first guide section 1702, the first boss 1701 being cylindrical, the first guide section 1702 having a diameter larger than the first and second bosses 1701, 1703. The return spring 19 is a coil spring, and the first boss 1701 is used for inserting into the return spring 19 to position one end of the return spring 19, and the return spring 19 is sandwiched between the pressure adjusting screw 18 and the first guide section 1702. The pilot spring seat 17 has a first contact surface that contacts the end surface of the second spool 15, and both the end surface of the second spool 15 and the first contact surface are planes perpendicular to the axis of the second spool 15. The second boss 1703 is spherical, and the first contact surface is the outer surface of the second boss 1703, and the first contact surface is perpendicular to the axis of the second boss 1703. The water conservancy diversion spring holder 17 is owing to press from both sides between reset spring 19 and second valve core 15, second valve core 15 and reset spring 19 all exert along axial effort to water conservancy diversion spring holder 17, water conservancy diversion spring holder 17 is through the first contact surface that sets up on the second boss 1703 and the end face contact of second valve core 15, form the plane contact, form stable area of contact, can ensure that water conservancy diversion spring holder 17 atress is even, make water conservancy diversion spring holder 17 only receive the axial force, do not receive radial interference, prevent to receive radial force to lead to reset spring 19 card to die or bending deformation, prevent that the spring from holding back the card, the reliability is improved. The sixth liquid passing hole 26 extends from the end surface of the first guide section 1702 facing the valve body 1 toward the inside of the first guide section 1702 and extends to the inside of the first boss 1701, the seventh liquid passing hole 27 is a circular hole provided at the center of the inside of the first boss 1701, and the seventh liquid passing hole 27 opens at the end surface of the first boss 1701 facing the pressure regulating screw 18.

As shown in fig. 14 and 16, the pressure adjusting screw 18 is located in the inner cavity of the valve housing 14, the pressure adjusting screw 18 is screwed into the valve housing 14, an external thread is provided on the outer circumferential surface of the pressure adjusting screw 18, and an internal thread is provided on the inner circumferential surface of the valve housing 14. The eighth liquid passing hole 28 is disposed at the center of the pressure regulating screw 18, and the eighth liquid passing hole 28 is a through hole penetrating the pressure regulating screw 18 in the axial direction. The eighth liquid passing hole 28 can be used for discharging liquid outwards, and can also be used for inserting a tool in the dismounting and mounting process of the pressure regulating screw 18, so that the tool can screw the pressure regulating screw 18, and meanwhile, the eighth liquid passing hole 28 is also used for allowing emulsion to pass through after the overflow valve is opened. The eighth liquid passing hole 28 is a regular hexagonal hole matched with the shape of the tool, so that the tool is convenient to disassemble and assemble, and the structure is simplified. Set up third boss 1801 on the pressure regulating screw 18, third boss 1801 is the cylinder, third boss 1801 is arranged in inserting reset spring 19 and fixes a position reset spring 19's the other end, third boss 1801 and second boss 1703 and the coaxial setting of pressure regulating screw 18, third boss 1801 is the same with second boss 1703 and external diameter size and roughly equals with reset spring 19's internal diameter, the external diameter of pressure regulating screw 18 is greater than the external diameter of third boss 1801, the center department of third boss 1801 sets up the centre bore that passes liquid hole 28 and communicate with the eighth, this centre bore is for running through the setting along the axial of third boss 1801.

In the present embodiment, six fifth liquid passing holes 25 are provided, and four sixth liquid passing holes 26 are provided.

As shown in fig. 1, it is preferable that the diameter of the fifth liquid passing hole 25 is larger than that of the third liquid passing hole 23, the diameter of the sixth liquid passing hole 26 is larger than that of the fifth liquid passing hole 25, the diameter of the seventh liquid passing hole 27 is larger than that of the sixth liquid passing hole 26, and the diameter of the eighth liquid passing hole 28 is larger than that of the seventh liquid passing hole 27.

As shown in fig. 4 and 14, the overflow valve core assembly further includes a sealing assembly disposed between the second valve core 15 and the second threaded sleeve 16, and the fourth liquid passing hole 24 is located between the sealing assembly and the flow guide spring seat 17. The sealing assembly comprises an inner sealing ring 20 sleeved on the second valve core 15 and an outer sealing ring 21 sleeved on the inner sealing ring 20, the inner sealing ring 20 is a circular ring-shaped sealing ring, the cross section of the inner sealing ring 20 is rectangular, the outer sealing ring 21 is an O-shaped sealing ring, the inner sealing ring 20 is made of a composite material, and the outer sealing ring 21 is made of rubber. The inner seal ring 20 is sandwiched between the inner wall surface of the valve body 1 and the second thread insert 16 in the axial direction. The inner circumferential surface of the inner seal ring 20 is attached to the outer circumferential surface of the second valve spool 15, the outer seal ring 21 applies radial pressure to the inner seal ring 20 to make the inner seal ring 20 and the second valve spool 15 in tight contact, and the outer circumferential surface of the inner seal ring 20 is attached to the inner circumferential surface of the outer seal ring 21. Because the second valve core 15 is movable, the side wall of the second valve core 15 is provided with a liquid through hole, when the second valve core 15 pushes the flow guide spring seat 17 to move by arranging a first sealing assembly composed of an inner sealing ring 20 and an outer sealing ring 21 which are matched with each other between the second valve core 15 and the second screw sleeve 16, the emulsion simultaneously enters a third liquid through hole 23 of the second valve core 15, when the second valve core 15 moves to make the third liquid through hole 23 aligned with the inner sealing ring 20, the emulsion can erode the inner circumferential surface of the inner sealing ring 20, pressure is generated on the inner sealing ring 20, and then the inner sealing ring 20 has a tendency of expanding along the radial direction, and the outer sealing ring 21 presses the inner sealing ring 20 to avoid the inner sealing ring 20 from expanding, so that the inner sealing ring 20 is in closer contact with the second valve core 15, erosion of the emulsion overflowing from the liquid through hole of the second valve core 15 to the inner circumferential surface of the inner sealing ring 20 is reduced, therefore, the sealing reliability and the service life of the sealing structure can be improved, and the sealing performance can be finally improved.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims (9)

1. The push combination valve is characterized in that: the overflow valve core assembly comprises a valve body, a one-way valve core assembly and an overflow valve core assembly, wherein a first valve cavity for accommodating the one-way valve core assembly, a second valve cavity for accommodating the overflow valve core assembly, a first liquid inlet channel, a second liquid inlet channel and a first liquid outlet channel are arranged in the valve body, and the first liquid outlet channel is communicated with the second valve cavity.

2. The pusher combination valve of claim 1, wherein: the one-way valve element assembly comprises a first threaded sleeve, a first liquid inlet valve sleeve, a liquid outlet valve sleeve, a valve seat arranged between the first liquid inlet valve sleeve and the liquid outlet valve sleeve, a mandril arranged movably, a first small valve element arranged movably, a big valve element arranged in the liquid outlet valve sleeve and sleeved on the first small valve element movably, a first spring applying elastic acting force to the mandril and a second spring applying elastic acting force to the first small valve element, wherein the second spring pushes the first small valve element to enable the head of the valve element to extend out of the big valve element, and the big valve element is connected with the valve seat in a sealing mode.

3. The pusher combination valve of claim 2, wherein: one end of the first liquid inlet valve sleeve is in threaded connection with the first threaded sleeve, and the other end of the first liquid inlet valve sleeve is in threaded connection with the liquid outlet valve sleeve.

4. The pusher combination valve of claim 2, wherein: the liquid inlet valve is characterized in that a liquid inlet hole is formed in the first screw sleeve, an unloading cavity and a guide hole used for guiding the ejector rod are formed in the first liquid inlet valve sleeve, the head of the ejector rod extends into the unloading cavity of the first liquid inlet valve sleeve, and the tail of the ejector rod is located in the first screw sleeve.

5. The pusher combination valve according to any one of claims 2 to 4, wherein: the head of the big valve core is of a frustum structure, and the ejector rod and the big valve core start to contact at the port of the valve seat.

6. The pusher-combiner valve of claim 5, wherein: the big valve core is in hard sealing connection with the valve seat.

7. The pusher combination valve according to any one of claims 1 to 4, wherein: the overflow valve core assembly comprises a valve casing connected with the valve body, a second valve core capable of being movably arranged, a second thread sleeve arranged inside the valve body and sleeved on the second valve core, a flow guide spring seat movably arranged inside the valve casing, a pressure regulating screw arranged inside the valve casing and a reset spring arranged between the flow guide spring seat and the pressure regulating screw.

8. The pusher combination valve of claim 7, wherein: the overflow valve core assembly further comprises a sealing assembly arranged between the second valve core and the second threaded sleeve.

9. The pusher combination valve of claim 8, wherein: the sealing assembly comprises an inner sealing ring sleeved on the second valve core and an outer sealing ring sleeved on the inner sealing ring.

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