CN210195791U - Valve element assembly and reversing valve with same - Google Patents
Valve element assembly and reversing valve with same Download PDFInfo
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- CN210195791U CN210195791U CN201920834591.0U CN201920834591U CN210195791U CN 210195791 U CN210195791 U CN 210195791U CN 201920834591 U CN201920834591 U CN 201920834591U CN 210195791 U CN210195791 U CN 210195791U
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Abstract
The utility model discloses a case subassembly, including the feed liquor valve barrel, set up the depression bar in returning the liquid valve barrel for threaded connection's liquid return valve barrel, mobilizable with the feed liquor valve barrel and set up in return the liquid valve barrel on and be used for forming threaded connection's swivel nut with the valve body of switching-over valve, the swivel nut has external screw thread and swivel nut to set to rotatable for returning the liquid valve barrel. The utility model discloses a case subassembly carries out threaded connection through the valve body that sets up swivel nut and switching-over valve on returning the liquid valve housing, makes during the dismantlement the feed liquor valve barrel can not lead to taking off with returning the liquid valve barrel pine because of frictional resistance's existence, has improved the reliability that returns liquid valve barrel and feed liquor valve barrel are connected, ensures that the case subassembly can wholly pull out from the valve body. The utility model also discloses a switching-over valve.
Description
Technical Field
The utility model belongs to relate to the colliery is combined and is adopted hydraulic support, specifically speaking, the utility model relates to a case subassembly and have its switching-over valve.
Background
Under the large environment that the coal mine comprehensive mining is developed towards automation and high efficiency, the support with large mining height and high impedance is popularized more and more, and the corresponding operating valve is also developed gradually from the former small flow to the current medium flow and large flow. In the coal industry, reversing valves are also referred to as pilot valves or control valves. In a hydraulic system of a hydraulic support, a reversing valve controls the direction of liquid flow, and different actions of lifting, pushing, sliding, pulling and the like of the hydraulic support are realized.
At present, a small-flow reversing valve comprises a valve body and a valve core assembly, wherein a main liquid inlet hole, a main liquid return hole and two working ports are formed in the valve body, the main liquid inlet hole and the main liquid return hole are formed in the same side face of the valve body, and the two working ports are respectively formed in the other two opposite side faces of the valve body. The valve core assembly comprises a pressure rod, a liquid return valve sleeve, a liquid inlet valve sleeve and a valve core, wherein two ends of the valve core are opened, and a hollow oil duct is arranged inside the valve core. The liquid return valve sleeve is in threaded connection with the liquid inlet valve sleeve, the liquid return valve sleeve is in threaded connection with the valve body, and threads are arranged at two ends of the liquid return valve sleeve.
Although the integration level of the valve core assembly can be improved by the connection mode, the valve core assembly can form large friction resistance due to the fact that the sealing ring sleeved outside and the inner hole of the valve body are extruded in the process of being detached from the valve body, and the liquid return valve sleeve and the liquid inlet valve sleeve are unscrewed due to the friction resistance, so that the valve core assembly cannot be detached from the valve body integrally.
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 case subassembly, the purpose is convenient and the dismantlement of switching-over valve body.
In order to realize the purpose, the utility model discloses the technical scheme who takes does: the valve core assembly comprises a liquid inlet valve sleeve, a liquid return valve sleeve in threaded connection with the liquid inlet valve sleeve, a pressure rod movably arranged in the liquid return valve sleeve, and a threaded sleeve which is arranged on the liquid return valve sleeve and is used for forming threaded connection with a valve body of the reversing valve, wherein the threaded sleeve is provided with external threads and is arranged to be rotatable relative to the liquid return valve sleeve.
The threaded sleeve is of a circular structure, is sleeved on the liquid return valve sleeve and is coaxially arranged with the liquid return valve sleeve, and an external thread is arranged on the outer circular surface of the threaded sleeve.
The valve core assembly further comprises a locking mechanism, and the locking mechanism is arranged to prevent the screw sleeve and the liquid return valve sleeve from moving relatively along the axial direction and enable the screw sleeve and the liquid return valve sleeve to rotate relatively.
The screw sleeve is provided with an accommodating groove for accommodating the locking mechanism, and the liquid return valve sleeve is provided with a locking groove for embedding the locking mechanism.
The liquid return valve is characterized in that the plurality of accommodating grooves are uniformly formed in the side wall of the screw sleeve along the circumferential direction, the locking grooves are annular grooves extending along the whole circumferential direction on the outer circular surface of the liquid return valve sleeve, and a locking mechanism is arranged in each accommodating groove.
The locking mechanism comprises a locking piece embedded in the locking groove and the accommodating groove and a pressing piece applying pressure to the locking piece to enable the locking piece to be fixed.
The locking piece is spherical, and the cross section of locking groove is semi-circular.
The pressing piece is a screw in threaded connection with the threaded sleeve.
The utility model also provides a switching-over valve, including valve body and foretell case subassembly.
The utility model discloses a case subassembly carries out threaded connection through the valve body that sets up swivel nut and switching-over valve on returning the liquid valve housing, makes during the dismantlement the feed liquor valve barrel can not lead to taking off with returning the liquid valve barrel pine because of frictional resistance's existence, has improved the reliability that returns liquid valve barrel and feed liquor valve barrel are connected, ensures that the case subassembly can wholly pull out from the valve body.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a cross-sectional view of a valve cartridge assembly of the first embodiment;
fig. 2 is a cross-sectional view of a valve core assembly of the second embodiment;
labeled as: 1. a pressure lever; 2. a liquid return valve sleeve; 3. a guide sleeve; 4. a liquid inlet valve pocket; 5. a valve core; 6. a spring; 7. a first liquid passing hole; 8. a second liquid passing hole; 9. a first oil passage; 10. a second oil passage; 11. a sealing part; 12. a threaded sleeve; 13. a locking member; 14. a compression member; 15. a seal ring; 16. 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.
It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction relationship in structure and/or function, nor represent a sequential execution order, but merely for convenience of description.
Example one
As shown in fig. 1, the present embodiment provides a valve core assembly, which includes a liquid inlet valve sleeve 4, a liquid return valve sleeve 2 in threaded connection with the liquid inlet valve sleeve 4, a pressure rod 1 movably disposed in the liquid return valve sleeve 2, and a threaded sleeve 12 disposed on the liquid return valve sleeve 2 and configured to form a threaded connection with a valve body of a reversing valve, where the threaded sleeve 12 has an external thread and the threaded sleeve 12 is disposed to be rotatable relative to the liquid return valve sleeve 2.
Specifically, as shown in fig. 1, the valve core assembly of this embodiment further includes a valve core, a guide sleeve 3 and a spring, the guide sleeve is sleeved on the valve core, the valve core is movably disposed in the liquid inlet valve sleeve 4, and the valve core, the liquid inlet valve sleeve 4 and the pressure rod 1 are coaxially disposed. The liquid return valve sleeve 2 is sleeved on the pressure rod 1, an inner hole matched with the external shape of the pressure rod 1 is formed in the liquid return valve sleeve 2, the cross section of the pressure rod 1 is in a convex shape, the head of the pressure rod 1 extends out of the end part of the liquid return valve sleeve 2, and an inner hole which extends from the tail end face in the axial direction is formed in the pressure rod 1. The main part of case is cylindrical, and the case is both ends opening, inside hollow structure, and the case is inside to be the cavity oil duct along axial extension, and the case cooperatees with depression bar 1 and can realize sealedly. Guide pin bushing 3 presss from both sides between feed liquor valve barrel 4 and liquid return valve barrel 2, and guide pin bushing 3 is located liquid return valve barrel 2's inside and the cover and locates on the case, makes things convenient for the dismouting, makes the case subassembly form a holistic cartridge formula structure moreover, and the integrated level is high, the installation and the dismantlement in the valve body of switching-over valve of convenience.
As shown in fig. 1, the liquid inlet valve sleeve 4 and the liquid return valve sleeve 2 are cylindrical structures with openings at both ends and hollow interiors, one end of the liquid inlet valve sleeve 4 is inserted into the opening end of the liquid return valve sleeve 2 and is in threaded connection with the opening end of the liquid return valve sleeve 2, an external thread is correspondingly arranged on the outer wall of the end part of the liquid inlet valve sleeve 4, and an internal thread is arranged on the inner wall of the opening end of the liquid return valve sleeve 2. The cylindrical side wall of the liquid inlet valve sleeve 4 is provided with a first liquid passing hole 7 for liquid to pass through, and the first liquid passing hole 7 is a circular through hole which is arranged on the cylindrical side wall of the liquid inlet valve sleeve 4 in a penetrating mode. The first liquid passing holes 7 are formed in the cylindrical side wall of the liquid inlet valve sleeve 4 uniformly along the circumferential direction, a liquid inlet cavity is formed in the liquid inlet valve sleeve 4, the first liquid passing holes are communicated with the liquid inlet cavity, and emulsion enters the liquid inlet cavity from the first liquid passing holes 7. The cylindrical side wall of the liquid return valve sleeve 2 is provided with a third liquid passing hole 16 for liquid to pass through, the third liquid passing hole 16 is a circular through hole which is arranged on the cylindrical side wall of the liquid return valve sleeve 2 in a penetrating mode, a liquid return cavity is formed inside the liquid return valve sleeve 2, and the third liquid passing hole 16 is communicated with the liquid return cavity. The first liquid passing hole 7 arranged on the liquid inlet valve sleeve 4 is a circular through hole, the third liquid passing hole 16 arranged on the liquid return valve sleeve 2 is a circular through hole, an included angle is formed between the axis of the third liquid passing hole 16 and the axis of the liquid return valve sleeve 2, the included angle is an acute angle, namely the third liquid passing hole 16 is also designed to be an inclined hole, so that liquid flows out more smoothly, the resistance loss is smaller, and the liquid return valve is easy to process.
As shown in fig. 1, a hollow oil passage axially penetrating through the center of the valve core is provided, the hollow oil passage includes a first oil passage 9 and a second oil passage 10 which are communicated with each other and sequentially arranged along the axial direction, the diameter of the first oil passage 9 is larger than that of the second oil passage 10, the first oil passage 9 is located between the second oil passage 10 and a working port provided on the end face of the valve body, and the second oil passage 10 is located between the pressure lever 1 and the first oil passage 9. The first oil passage 9 and the second oil passage 10 are coaxially arranged, and the length of the second oil passage 10 is greater than that of the first oil passage 9. By arranging the hollow oil duct in the valve core 5 to be composed of the first oil duct 9 with a large diameter and the second oil duct 10 with a small diameter, when high-pressure liquid enters from the space between the valve core and the guide sleeve 3, the liquid can be conveyed timely, and a buffer area is formed when the liquid returns from the working port, so that the laminar flow of the liquid is better guaranteed. Be equipped with the second that lets liquid pass through on the cylindrical side wall of case and cross liquid hole 8, the second is crossed liquid hole 8 and is run through the circular through-hole that sets up for on the cylindrical side wall that surrounds formation second oil duct 10 on the case, and the second is crossed liquid hole 8 and evenly sets up a plurality ofly for following circumference on the cylindrical side wall of case, and the second is crossed liquid hole 8 and is linked together and both axes are mutually perpendicular with second oil duct 10. When the valve core assembly is in an initial state, the second liquid passing hole 8 is aligned with the guide sleeve 3 and is closed by the guide sleeve 3 and the corresponding sealing piece.
As shown in fig. 1, the valve core has a sealing part 11, a conical surface is provided on the outer side surface of the sealing part 11, an arc surface which is connected with the conical surface of the sealing part 11 in a sealing way and is in line contact with the conical surface is provided at the end part of the guide sleeve 3, and the arc surface is matched with the sealing part 11 to play a sealing role. The sealing part 11 is a complete annular structure which is arranged on the side wall of the valve core and protrudes outwards, is coaxial with the valve core and is positioned in the inner cavity of the liquid inlet valve sleeve 4. In the axial direction of the spool, a seal portion 11 is located between the first oil passage 9 and the second liquid passing hole 8. The outside of the valve core is also sleeved with a spring 6, the spring 6 is positioned in the liquid inlet valve sleeve 4, one end of the spring 6 is propped against the end surface of the sealing part 11 of the valve core, and the other end is propped against a step surface which is arranged in the liquid inlet valve sleeve 4 and is close to the tail end. When the valve core assembly is in an initial state, the spring 6 pushes the valve core to move towards the pressure rod 1 until the sealing part 11 is contacted with the arc surface on the guide sleeve 3 to realize sealing. In addition, O-shaped sealing rings are respectively arranged between the two ends of the valve core and the liquid inlet valve sleeve 4 and the guide sleeve 3, and the second liquid passing hole 8 and the sealing part 11 are positioned between the O-shaped sealing rings at the two ends of the valve core, so that the sealing of the liquid inlet cavity is ensured.
In the initial state as shown in fig. 1, the valve is closed, the valve core and the guide sleeve 3 are sealed, the liquid inlet cavity of the liquid inlet valve sleeve 4 is not communicated with the oil channel in the valve core, and the oil channel is not communicated; when the valve needs to be opened, a handle of the reversing valve is pulled towards a working port direction where emulsion needs to flow out, the pressure rod 1 pushes the valve element to move, the sealing part 11 of the valve element is separated from the arc surface of the guide sleeve 3, the liquid inlet cavity of the liquid inlet valve sleeve 4 is communicated with the oil channel in the valve element through the second liquid passing hole 8, the emulsion can enter the liquid inlet cavity and then enters the oil channel in the valve element from the second liquid passing hole 8 in the valve element, and the emulsion can flow into the working port in the valve body from the oil channel in the valve element due to the sealing between the valve element and the pressure rod 1. After the valve is closed, the emulsion in the liquid outlet cavity flows back to the emulsion pump station through the third liquid passing hole on the liquid return valve sleeve 2 and the main liquid return hole of the valve body.
The material of the pressure lever 1, the guide sleeve 3 and the valve core of the valve core assembly is the same, and all the materials are 3Cr 13. When depression bar 1 moved towards the case under the exogenic action, when the inside wall of depression bar 1 contacted with the lateral wall of case, be hard sealing connection between the tip of depression bar 1 and case, as shown in fig. 1, the tip of case towards depression bar 1 is the frustum structure, the external conical surface's of this frustum structure tapering is 60 degrees, an arc surface is processed out to depression bar 1's hole entrance to form a fillet at depression bar 1's hole entrance, be the line contact between the tip external conical surface of this arc surface and case, form the seal structure of a single awl hole cambered surface between case and the depression bar 1 promptly. When the valve core assembly is in an initial state, the sealing part 11 of the valve core is in hard sealing connection with the arc surface of the guide sleeve 3, a conical surface with the conical degree of 60 degrees is processed on the outer side surface of the sealing part 11, and a sealing structure with a single-cone outer circular surface is formed between the valve core and the guide sleeve 3.
The valve core assembly adopts the sealing structure consisting of the single-cone inner hole cambered surface and the single-cone outer circular surface, the sealing form is hard sealing, namely circular-ring line sealing, and compared with the sealing of soft materials, the hard sealing has good sealing performance and can resist ultrahigh pressure, the service life of a sealing pair can be effectively prolonged, the service life of the valve core assembly can be prolonged, the sealing reliability of the valve core assembly can be improved, and the fault-free working time of the reversing valve can be greatly prolonged when the valve core assembly is applied to the reversing valve.
As shown in fig. 1, a sealing ring 16 is sleeved on the liquid inlet valve pocket 4, the sealing ring 16 is an O-ring, the sealing ring 16 is located between the liquid inlet valve pocket 4 and the valve body, and the sealing ring 16 is in contact with the inner circular surface of the valve cavity of the valve body. The threaded sleeve 12 is of a circular ring structure, the threaded sleeve 12 is sleeved on the liquid return valve sleeve 2, the threaded sleeve 12 and the liquid return valve sleeve 2 are coaxially arranged, and an external thread is arranged on the outer circular surface of the threaded sleeve 12. The valve body of the reversing valve is provided with a valve cavity for accommodating the valve core assembly, the valve cavity is a circular cavity, the valve body is in threaded connection with the threaded sleeve 12, and threads are arranged on the inner circular surface of the valve cavity of the valve body. The screw sleeve 12 is sleeved on the liquid return valve sleeve 2, the screw sleeve 12 can rotate around the axis of the liquid return valve sleeve 2 relative to the liquid return valve sleeve 2, and therefore in the process of disassembling the valve core assembly on the valve body of the reversing valve, the screw sleeve 12 is rotated to unscrew the screw sleeve 12 from the valve cavity of the valve body, the screw sleeve 12 cannot drive the liquid return valve sleeve 2 to rotate, due to the existence of the sealing rings arranged on the liquid inlet valve sleeve 4 and the liquid return valve sleeve 2, the sealing rings and the valve cavity of the valve body are extruded to form large friction resistance, the liquid inlet valve sleeve 4 cannot be separated from the liquid return valve sleeve 2 due to the existence of the friction resistance during disassembly, the reliability of connection of the liquid return valve sleeve 2 and the liquid inlet valve sleeve 4 is improved, and the valve core assembly can.
As shown in fig. 1, the valve core assembly of this embodiment further includes a locking mechanism, which is configured to prevent the screw sleeve 12 and the fluid return valve sleeve 2 from moving relatively in the axial direction and enable the screw sleeve 12 and the fluid return valve sleeve 2 to rotate relatively. The one end threaded connection on the length direction of feed liquor valve barrel 4 and liquid return valve barrel 2, the swivel nut 12 passes through locking mechanism and installs the other end on the length direction of liquid return valve barrel 2, and this end on the length direction of liquid return valve barrel 2 is located the opening part that sets up on the valve body terminal surface, and swivel nut 12 also is located this opening part, makes things convenient for the operation when case subassembly and valve body dismouting, through rotatory swivel nut 12 can when the dismouting. After the threaded sleeve 12 is completely screwed out of the valve cavity of the valve body, the valve core assembly can be drawn out of the valve cavity of the valve body, and the disassembly of the valve core assembly is completed; and (3) completely screwing the threaded sleeve 12 into the valve cavity of the valve body to complete the installation of the valve core assembly.
As shown in fig. 1, the locking mechanism can prevent the screw sleeve 12 and the fluid return valve sleeve 2 from moving relatively in the axial direction and can enable the screw sleeve 12 and the fluid return valve sleeve 2 to rotate relatively. Like this assemble at case subassembly and valve body and carry out the in-process of dismantling with the valve body at the case subassembly, swivel nut 12 can rotate around its axis for liquid return valve barrel 2, compare liquid return valve barrel 2 and the valve body in the switching-over valve in prior art and pass through threaded connection, locking mechanism can avoid appearing not hard up condition between liquid return valve barrel 2 and the liquid inlet valve barrel 4 because of the sealing washer that liquid inlet valve barrel 4 outside cover was established and the frictional resistance that the inner wall extrusion of valve body produced, lead to liquid inlet valve barrel 4 and the separation of liquid return valve barrel 2, thereby the reliability of liquid return valve barrel 2 and liquid inlet valve barrel 4 being connected has been improved. The screw sleeve 12 has a holding groove for holding the locking mechanism, and the return valve sleeve 2 has a locking groove for fitting the locking mechanism. The containing grooves are through holes which are arranged on the side wall of the screw sleeve 12 in a penetrating mode along the radial direction, the containing grooves are evenly arranged on the side wall of the screw sleeve 12 along the circumferential direction, and the locking grooves are annular grooves which extend on the outer circular surface of the liquid return valve sleeve 2 along the whole circumferential direction. The locking mechanisms are arranged in a plurality of and are uniformly distributed along the circumferential direction, the number of the accommodating grooves 23 is the same as that of the locking mechanisms, each locking mechanism is embedded into one accommodating groove, the axis of each accommodating groove is perpendicular to the axis of the screw sleeve 12, and the accommodating grooves are through holes which penetrate through the side wall of the screw sleeve 12 along the radial direction.
As shown in fig. 1, the locking mechanism includes a lock member 13 fitted into both the lock groove and the accommodation groove, and a pressing member 14 for pressing the lock member 13 to be fixed. The locking member 13 is preferably spherical, the cross-section of the locking groove is semicircular, and the pressing member 14 is preferably a screw inserted into the accommodating groove and threadedly coupled to the screw sleeve 12. The pressing piece 14 is screwed into the accommodating groove to press the locking piece 13, so that one part of the locking piece 13 is embedded into the accommodating groove, and the other part of the locking piece 13 is embedded into the locking groove, so that the connection between the screw sleeve 12 and the liquid return valve sleeve 2 can be realized, the relative rotation between the screw sleeve 12 and the liquid return valve sleeve 2 can be realized, and the screw sleeve 12 and the liquid return valve sleeve 2 cannot be separated. The locking groove is the circular slot, and locking piece 13 is the spherical piece that matches with the locking groove, can increase return liquid valve barrel 2 pivoted efficiency, reduces frictional resistance, and return liquid valve barrel 2 rotates the in-process, and locking piece 13 can slide along circumference in the locking groove.
Preferably, the material of the thread insert 12 is No. 45 steel, and the material of the valve body is No. 45 steel, so that the problem of thread occlusion after stainless steel is pressed is avoided. The material of the liquid inlet valve sleeve 4 is the same as that of the liquid return valve sleeve 2, and both are 1Cr17Ni 2.
The embodiment also provides a reversing valve which comprises a valve body and the valve core assembly with the structure. The specific structure of the valve core assembly can be shown in fig. 1, and is not described herein again. Since the reversing valve of the present invention includes the valve core assembly in the above embodiments, it has all the advantages of the above valve core assembly.
Example two
As shown in fig. 2, the present embodiment provides a valve core assembly, which includes a liquid inlet valve sleeve 4, a liquid return valve sleeve 2 in threaded connection with the liquid inlet valve sleeve 4, a pressure rod 1 movably disposed in the liquid return valve sleeve 2, and a threaded sleeve 12 disposed on the liquid return valve sleeve 2 and used for forming threaded connection with a valve body of a reversing valve, wherein the threaded sleeve 12 has an external thread and the threaded sleeve 12 is disposed to be rotatable relative to the liquid return valve sleeve 2.
Specifically, as shown in fig. 2, the valve core assembly of this embodiment further includes a valve core, a guide sleeve 3 and a spring, the guide sleeve is sleeved on the valve core, the valve core is movably disposed in the liquid inlet valve sleeve 4, and the valve core, the liquid inlet valve sleeve 4 and the pressure rod 1 are coaxially disposed. The liquid return valve sleeve 2 is sleeved on the pressure rod 1, an inner hole matched with the external shape of the pressure rod 1 is formed in the liquid return valve sleeve 2, the cross section of the pressure rod 1 is in a convex shape, the head of the pressure rod 1 extends out of the end part of the liquid return valve sleeve 2, and an inner hole which extends from the tail end face in the axial direction is formed in the pressure rod 1. The main part of case is cylindrical, and the case is both ends opening, inside hollow structure, and the case is inside to be the cavity oil duct along axial extension, and the case cooperatees with depression bar 1 and can realize sealedly. Guide pin bushing 3 presss from both sides between feed liquor valve barrel 4 and liquid return valve barrel 2, and guide pin bushing 3 is located liquid return valve barrel 2's inside and the cover and locates on the case, makes things convenient for the dismouting, makes the case subassembly form a holistic cartridge formula structure moreover, and the integrated level is high, the installation and the dismantlement in the valve body of switching-over valve of convenience.
As shown in fig. 2, the liquid inlet valve sleeve 4 and the liquid return valve sleeve 2 are cylindrical structures with openings at both ends and hollow interiors, one end of the liquid return valve sleeve 2 is inserted into the opening end of the liquid inlet valve sleeve 4 and is in threaded connection with the opening end of the liquid inlet valve sleeve 4, an external thread is correspondingly arranged on the outer wall of the end of the liquid return valve sleeve 2, and an internal thread is arranged on the inner wall of the opening end of the liquid inlet valve sleeve 4. The cylindrical side wall of the liquid inlet valve sleeve 4 is provided with a first liquid passing hole 7 for liquid to pass through, and the first liquid passing hole 7 is a circular through hole which is arranged on the cylindrical side wall of the liquid inlet valve sleeve 4 in a penetrating mode. The first liquid passing holes 7 are formed in the cylindrical side wall of the liquid inlet valve sleeve 4 uniformly along the circumferential direction, a liquid inlet cavity is formed in the liquid inlet valve sleeve 4, the first liquid passing holes are communicated with the liquid inlet cavity, and emulsion enters the liquid inlet cavity from the first liquid passing holes 7. The cylindrical side wall of the liquid return valve sleeve 2 is provided with a third liquid passing hole 16 for liquid to pass through, the third liquid passing hole 16 is a circular through hole which is arranged on the cylindrical side wall of the liquid return valve sleeve 2 in a penetrating mode, a liquid return cavity is formed inside the liquid return valve sleeve 2, and the third liquid passing hole 16 is communicated with the liquid return cavity. The first liquid passing hole 7 arranged on the liquid inlet valve sleeve 4 is a circular through hole, the third liquid passing hole 16 arranged on the liquid return valve sleeve 2 is a circular through hole, an included angle is formed between the axis of the first liquid passing hole 7 and the axis of the liquid inlet valve sleeve 44, the included angle is an acute angle, namely the first liquid passing hole 7 adopts an inclined hole design, so that liquid can enter more smoothly, the resistance loss is smaller, and the processing is easy.
As shown in fig. 2, a hollow oil passage axially penetrating through the center of the valve core is provided, the hollow oil passage includes a first oil passage 9 and a second oil passage 10 which are communicated with each other and sequentially arranged along the axial direction, the diameter of the first oil passage 9 is larger than that of the second oil passage 10, the first oil passage 9 is located between the second oil passage 10 and a working port provided on the end face of the valve body, and the second oil passage 10 is located between the pressure rod 1 and the first oil passage 9. The first oil passage 9 and the second oil passage 10 are coaxially arranged, and the length of the second oil passage 10 is greater than that of the first oil passage 9. By arranging the hollow oil duct in the valve core 5 to be composed of the first oil duct 9 with a large diameter and the second oil duct 10 with a small diameter, when high-pressure liquid enters from the space between the valve core and the guide sleeve 3, the liquid can be conveyed timely, and a buffer area is formed when the liquid returns from the working port, so that the laminar flow of the liquid is better guaranteed. Be equipped with the second that lets liquid pass through on the cylindrical side wall of case and cross liquid hole 8, the second is crossed liquid hole 8 and is run through the circular through-hole that sets up for on the cylindrical side wall that surrounds formation second oil duct 10 on the case, and the second is crossed liquid hole 8 and evenly sets up a plurality ofly for following circumference on the cylindrical side wall of case, and the second is crossed liquid hole 8 and is linked together and both axes are mutually perpendicular with second oil duct 10. When the valve core assembly is in an initial state, the second liquid passing hole 8 is aligned with the guide sleeve 3 and is closed by the guide sleeve 3 and the corresponding sealing piece.
As shown in fig. 2, the valve core has a sealing part 11, a conical surface is provided on the outer side surface of the sealing part 11, an arc surface which is connected with the conical surface of the sealing part 11 in a sealing way and is in line contact with the conical surface of the sealing part 11 is provided at the end part of the guide sleeve 3, and the arc surface is matched with the sealing part 11 to play a sealing role. The sealing part 11 is a complete annular structure which is arranged on the side wall of the valve core and protrudes outwards, is coaxial with the valve core and is positioned in the inner cavity of the liquid inlet valve sleeve 4. In the axial direction of the spool, a seal portion 11 is located between the first oil passage 9 and the second liquid passing hole 8. The outside of the valve core is also sleeved with a spring 6, the spring 6 is positioned in the liquid inlet valve sleeve 4, one end of the spring 6 is propped against the end surface of the sealing part 11 of the valve core, and the other end is propped against a step surface which is arranged in the liquid inlet valve sleeve 4 and is close to the tail end. When the valve core assembly is in an initial state, the spring 6 pushes the valve core to move towards the pressure rod 1 until the sealing part 11 is contacted with the arc surface on the guide sleeve 3 to realize sealing. In addition, O-shaped sealing rings are respectively arranged between the two ends of the valve core and the liquid inlet valve sleeve 4 and the guide sleeve 3, and the second liquid passing hole 8 and the sealing part 11 are positioned between the O-shaped sealing rings at the two ends of the valve core, so that the sealing of the liquid inlet cavity is ensured.
In the initial state as shown in fig. 2, the valve is closed, the valve core and the guide sleeve 3 are sealed, the liquid inlet cavity of the liquid inlet valve sleeve 4 is not communicated with the oil channel in the valve core, and the oil channel is not communicated; when the valve needs to be opened, a handle of the reversing valve is pulled towards a working port direction where emulsion needs to flow out, the pressure rod 1 pushes the valve element to move, the sealing part 11 of the valve element is separated from the arc surface of the guide sleeve 3, the liquid inlet cavity of the liquid inlet valve sleeve 4 is communicated with the oil channel in the valve element through the second liquid passing hole 8, the emulsion can enter the liquid inlet cavity and then enters the oil channel in the valve element from the second liquid passing hole 8 in the valve element, and the emulsion can flow into the working port in the valve body from the oil channel in the valve element due to the sealing between the valve element and the pressure rod 1. After the valve is closed, the emulsion in the liquid outlet cavity flows back to the emulsion pump station through the third liquid passing hole on the liquid return valve sleeve 2 and the main liquid return hole of the valve body.
The material of the pressure lever 1, the guide sleeve 3 and the valve core of the valve core assembly is the same, and all the materials are 3Cr 13. When depression bar 1 moved towards the case under the exogenic action, when the inside wall of depression bar 1 contacted with the lateral wall of case, be hard sealing connection between the tip of depression bar 1 and case, as shown in fig. 2, the tip of case towards depression bar 1 is the frustum structure, the external conical surface's of this frustum structure tapering is 60 degrees, an arc surface is processed out to depression bar 1's hole entrance to form a fillet at depression bar 1's hole entrance, be the line contact between the tip external conical surface of this arc surface and case, form the seal structure of a single awl hole cambered surface between case and the depression bar 1 promptly. When the valve core assembly is in an initial state, the sealing part 11 of the valve core is in hard sealing connection with the arc surface of the guide sleeve 3, a conical surface with the conical degree of 60 degrees is processed on the outer side surface of the sealing part 11, and a sealing structure with a single-cone outer circular surface is formed between the valve core and the guide sleeve 3.
The valve core assembly adopts the sealing structure consisting of the single-cone inner hole cambered surface and the single-cone outer circular surface, the sealing form is hard sealing, namely circular-ring line sealing, and compared with the sealing of soft materials, the hard sealing has good sealing performance and can resist ultrahigh pressure, the service life of a sealing pair can be effectively prolonged, the service life of the valve core assembly can be prolonged, the sealing reliability of the valve core assembly can be improved, and the fault-free working time of the reversing valve can be greatly prolonged when the valve core assembly is applied to the reversing valve.
As shown in fig. 2, a sealing ring 16 is sleeved on the liquid inlet valve pocket 4, the sealing ring 16 is an O-ring, the sealing ring 16 is located between the liquid inlet valve pocket 4 and the valve body, and the sealing ring 16 is in contact with the inner circular surface of the valve cavity of the valve body. The threaded sleeve 12 is of a circular ring structure, the threaded sleeve 12 is sleeved on the liquid return valve sleeve 2, the threaded sleeve 12 and the liquid return valve sleeve 2 are coaxially arranged, and an external thread is arranged on the outer circular surface of the threaded sleeve 12. The valve body of the reversing valve is provided with a valve cavity for accommodating the valve core assembly, the valve cavity is a circular cavity, the valve body is in threaded connection with the threaded sleeve 12, and threads are arranged on the inner circular surface of the valve cavity of the valve body. The screw sleeve 12 is sleeved on the liquid return valve sleeve 2, the screw sleeve 12 can rotate around the axis of the liquid return valve sleeve 2 relative to the liquid return valve sleeve 2, and therefore in the process of disassembling the valve core assembly on the valve body of the reversing valve, the screw sleeve 12 is rotated to unscrew the screw sleeve 12 from the valve cavity of the valve body, the screw sleeve 12 cannot drive the liquid return valve sleeve 2 to rotate, due to the existence of the sealing rings arranged on the liquid inlet valve sleeve 4 and the liquid return valve sleeve 2, the sealing rings and the valve cavity of the valve body are extruded to form large friction resistance, the liquid inlet valve sleeve 4 cannot be separated from the liquid return valve sleeve 2 due to the existence of the friction resistance during disassembly, the reliability of connection of the liquid return valve sleeve 2 and the liquid inlet valve sleeve 4 is improved, and the valve core assembly can.
As shown in fig. 2, the valve core assembly of this embodiment further includes a locking mechanism, which is configured to prevent the screw sleeve 12 and the fluid return valve sleeve 2 from moving relatively in the axial direction and enable the screw sleeve 12 and the fluid return valve sleeve 2 to rotate relatively. The one end threaded connection on the length direction of feed liquor valve barrel 4 and liquid return valve barrel 2, the swivel nut 12 passes through locking mechanism and installs the other end on the length direction of liquid return valve barrel 2, and this end on the length direction of liquid return valve barrel 2 is located the opening part that sets up on the valve body terminal surface, and swivel nut 12 also is located this opening part, makes things convenient for the operation when case subassembly and valve body dismouting, through rotatory swivel nut 12 can when the dismouting. After the threaded sleeve 12 is completely screwed out of the valve cavity of the valve body, the valve core assembly can be drawn out of the valve cavity of the valve body, and the disassembly of the valve core assembly is completed; and (3) completely screwing the threaded sleeve 12 into the valve cavity of the valve body to complete the installation of the valve core assembly.
As shown in fig. 2, the locking mechanism can prevent the screw sleeve 12 and the fluid return valve sleeve 2 from moving relatively in the axial direction and can enable the screw sleeve 12 and the fluid return valve sleeve 2 to rotate relatively. Like this assemble at case subassembly and valve body and carry out the in-process of dismantling with the valve body at the case subassembly, swivel nut 12 can rotate around its axis for liquid return valve barrel 2, compare liquid return valve barrel 2 and the valve body in the switching-over valve in prior art and pass through threaded connection, locking mechanism can avoid appearing not hard up condition between liquid return valve barrel 2 and the liquid inlet valve barrel 4 because of the sealing washer that liquid inlet valve barrel 4 outside cover was established and the frictional resistance that the inner wall extrusion of valve body produced, lead to liquid inlet valve barrel 4 and the separation of liquid return valve barrel 2, thereby the reliability of liquid return valve barrel 2 and liquid inlet valve barrel 4 being connected has been improved. The screw sleeve 12 has a holding groove for holding the locking mechanism, and the return valve sleeve 2 has a locking groove for fitting the locking mechanism. The containing grooves are through holes which are arranged on the side wall of the screw sleeve 12 in a penetrating mode along the radial direction, the containing grooves are evenly arranged on the side wall of the screw sleeve 12 along the circumferential direction, and the locking grooves are annular grooves which extend on the outer circular surface of the liquid return valve sleeve 2 along the whole circumferential direction. The locking mechanisms are arranged in a plurality of and are uniformly distributed along the circumferential direction, the number of the accommodating grooves 23 is the same as that of the locking mechanisms, each locking mechanism is embedded into one accommodating groove, the axis of each accommodating groove is perpendicular to the axis of the screw sleeve 12, and the accommodating grooves are through holes which penetrate through the side wall of the screw sleeve 12 along the radial direction.
As shown in fig. 2, the locking mechanism includes a lock member 13 fitted into both the lock groove and the accommodation groove, and a pressing member 14 for pressing the lock member 13 to be fixed. The locking member 13 is preferably spherical, the cross-section of the locking groove is semicircular, and the pressing member 14 is preferably a screw inserted into the accommodating groove and threadedly coupled to the screw sleeve 12. The pressing piece 14 is screwed into the accommodating groove to press the locking piece 13, so that one part of the locking piece 13 is embedded into the accommodating groove, and the other part of the locking piece 13 is embedded into the locking groove, so that the connection between the screw sleeve 12 and the liquid return valve sleeve 2 can be realized, the relative rotation between the screw sleeve 12 and the liquid return valve sleeve 2 can be realized, and the screw sleeve 12 and the liquid return valve sleeve 2 cannot be separated. The locking groove is the circular slot, and locking piece 13 is the spherical piece that matches with the locking groove, can increase return liquid valve barrel 2 pivoted efficiency, reduces frictional resistance, and return liquid valve barrel 2 rotates the in-process, and locking piece 13 can slide along circumference in the locking groove.
Preferably, the material of the thread insert 12 is No. 45 steel, and the material of the valve body is No. 45 steel, so that the problem of thread occlusion after stainless steel is pressed is avoided. The material of the liquid inlet valve sleeve 4 and the material of the liquid return valve sleeve 2 are the same and are No. 45 steel.
The embodiment also provides a reversing valve which comprises a valve body and the valve core assembly with the structure. The specific structure of the valve core assembly can be seen in fig. 2, and is not described herein again. Since the reversing valve of the present invention includes the valve core assembly in the above embodiments, it has all the advantages of the above valve core assembly.
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 valve core component comprises a liquid inlet valve sleeve, a liquid return valve sleeve in threaded connection with the liquid inlet valve sleeve and a movable pressing rod arranged in the liquid return valve sleeve, and is characterized in that: the reversing valve further comprises a threaded sleeve which is arranged on the liquid return valve sleeve and is used for forming threaded connection with a valve body of the reversing valve, the threaded sleeve is provided with external threads, and the threaded sleeve is arranged to be rotatable relative to the liquid return valve sleeve.
2. The spool assembly of claim 1, wherein: the threaded sleeve is of a circular structure, is sleeved on the liquid return valve sleeve and is coaxially arranged with the liquid return valve sleeve, and an external thread is arranged on the outer circular surface of the threaded sleeve.
3. The valve cartridge assembly of claim 2, wherein: the locking mechanism is arranged to prevent the screw sleeve and the liquid return valve sleeve from moving relatively along the axial direction and enable the screw sleeve and the liquid return valve sleeve to rotate relatively.
4. The valve cartridge assembly of claim 3, wherein: the screw sleeve is provided with an accommodating groove for accommodating the locking mechanism, and the liquid return valve sleeve is provided with a locking groove for embedding the locking mechanism.
5. The spool assembly of claim 4, wherein: the liquid return valve is characterized in that the plurality of accommodating grooves are uniformly formed in the side wall of the screw sleeve along the circumferential direction, the locking grooves are annular grooves extending along the whole circumferential direction on the outer circular surface of the liquid return valve sleeve, and a locking mechanism is arranged in each accommodating groove.
6. The spool assembly of claim 4 or 5, wherein: the locking mechanism comprises a locking piece embedded in the locking groove and the accommodating groove and a pressing piece applying pressure to the locking piece to enable the locking piece to be fixed.
7. The valve cartridge assembly of claim 6, wherein: the locking piece is spherical, and the cross section of locking groove is semi-circular.
8. The valve cartridge assembly of claim 7, wherein: the pressing piece is a screw in threaded connection with the threaded sleeve.
9. The reversing valve comprises a valve body and is characterized in that: a valve core assembly according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834591.0U CN210195791U (en) | 2019-06-04 | 2019-06-04 | Valve element assembly and reversing valve with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834591.0U CN210195791U (en) | 2019-06-04 | 2019-06-04 | Valve element assembly and reversing valve with same |
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| Publication Number | Publication Date |
|---|---|
| CN210195791U true CN210195791U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920834591.0U Active CN210195791U (en) | 2019-06-04 | 2019-06-04 | Valve element assembly and reversing valve with same |
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| CN (1) | CN210195791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056385A (en) * | 2019-06-04 | 2019-07-26 | 巨隆集团芜湖兴隆液压有限公司 | Core assembly and reversal valve with it |
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2019
- 2019-06-04 CN CN201920834591.0U patent/CN210195791U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056385A (en) * | 2019-06-04 | 2019-07-26 | 巨隆集团芜湖兴隆液压有限公司 | Core assembly and reversal valve with it |
| CN110056385B (en) * | 2019-06-04 | 2024-03-22 | 巨隆集团芜湖兴隆液压有限公司 | Valve core assembly and reversing valve with same |
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