CN218440002U - Pilot-operated type leakage-free safety pressure valve - Google Patents
Pilot-operated type leakage-free safety pressure valve Download PDFInfo
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- CN218440002U CN218440002U CN202222994489.1U CN202222994489U CN218440002U CN 218440002 U CN218440002 U CN 218440002U CN 202222994489 U CN202222994489 U CN 202222994489U CN 218440002 U CN218440002 U CN 218440002U
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Abstract
The utility model discloses a guide's formula does not have safe pressure valve that leaks relates to hydraulic system technical field, be provided with the first hydraulic fluid port that runs through the bottom surface and the first mounting groove that runs through the top surface in the valve body, one side of valve body is provided with the second hydraulic fluid port that is linked together with first mounting groove, two-way cartridge valve barrel sets up in first mounting groove, be provided with first step on the inner wall of two-way cartridge valve barrel, the bottom of two-way cartridge valve case can contact and form line seal with first step, second hydraulic fluid port, side hydraulic fluid port, second passageway and first holding tank communicate in proper order; the direct-acting pressure valve is arranged in a second mounting groove of the control cover plate, the second accommodating groove, the third channel and an oil inlet of the direct-acting pressure valve are sequentially communicated, and an oil outlet of the direct-acting pressure valve, the fourth channel and the upper end of the first channel are sequentially communicated. The pilot-operated type leakage-free safety pressure valve solves the problems that the large-scale forging equipment is leaked in a hydraulic loop and cannot realize large-flow discharge under the safety pressure, and ensures the safety of the equipment.
Description
Technical Field
The utility model relates to a hydraulic system technical field especially relates to a guide's formula does not have safe pressure valve that leaks.
Background
With the gradual popularization of domestic hydraulic transmission equipment, particularly in the aspects of large forging equipment and energy storage of large-volume pressure containers, higher requirements are put forward on a pilot pressure valve of a hydraulic system. The pilot pressure valve adopted by a hydraulic system of large forging equipment is used for controlling a piston cylinder rod cavity to require zero leakage self-locking, and a large flow of discharged high-pressure oil liquid must be instantly opened when the external force forced compression exceeds a safe set pressure, so that the position maintenance of a movable beam and the stable control of a large flow discharge function under the safe pressure are ensured. In a currently-used large forging and pressing equipment hydraulic system, a pilot pressure valve cannot meet the zero-leakage requirement and the requirement of safety pressure for instantly discharging high-pressure oil liquid at a large flow rate, internal leakage causes the movable beam to be incapable of keeping a position statically, and the high-flow oil liquid cannot be instantly discharged under the safety pressure, so that a piston cylinder is pressurized by a rod cavity to damage an oil cylinder or a hydraulic pipeline, equipment failure is frequently caused, and safety and quality hidden dangers cannot be avoided in the using process.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model provides a guide's formula does not have leakage safety pressure valve has solved large-scale forging and pressing equipment hydraulic circuit internal leakage and can't realize large-traffic exhaust problem under the safety pressure, has ensured the equipment security.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a guide's formula does not have safe pressure valve that leaks, including valve body, control cover plate, two-way cartridge valve barrel, two-way cartridge valve case, two-way cartridge valve bonnet, two-way cartridge valve spring, direct action type pressure valve and coupling assembling, be provided with the first hydraulic fluid port that runs through the bottom surface and the first mounting groove that runs through the top surface in the valve body, the first mounting groove with first hydraulic fluid port is linked together, one side of valve body is provided with the second hydraulic fluid port that is linked together with the first mounting groove, the opposite side of valve body is provided with first passageway, the lower extreme of first passageway with first hydraulic fluid port is linked together, the upper end of first passageway runs through the top surface of valve body, two-way cartridge valve barrel sets up in the first mounting groove, be provided with first step on the inner wall of two-way cartridge valve barrel, two-way cartridge valve case slide to set up in two-way cartridge valve barrel, the bottom of two-way cartridge valve barrel can contact with the first step and form line seal, the side of two-way cartridge valve barrel is provided with the hydraulic fluid port side, the upper portion of two-way cartridge valve barrel is provided with first hydraulic fluid port holding tank, the second cartridge valve bonnet is provided with the second hydraulic fluid port holding tank, the valve barrel and the second cartridge valve bonnet is provided with the second cartridge valve barrel and the second cartridge valve barrel on the valve bonnet holding tank in proper order; the control cover plate is installed on the upper portion of the valve body through a connecting assembly, a second accommodating groove is formed in the lower portion of the control cover plate, one end of a two-way cartridge valve spring is located in the first accommodating groove, the other end of the two-way cartridge valve spring penetrates through the through hole and extends into the second accommodating groove, a second mounting groove is formed in one side of the control cover plate, the direct-acting pressure valve is arranged in the second mounting groove, a third channel and a fourth channel are arranged in the control cover plate, the second accommodating groove, the third channel and an oil inlet of the direct-acting pressure valve are sequentially communicated, and an oil outlet of the direct-acting pressure valve, the fourth channel and the upper end of the first channel are sequentially communicated.
Preferably, the first channel comprises a first vertical channel and a first horizontal channel arranged at the lower part of the first vertical channel, two ends of the first horizontal channel are respectively communicated with the first oil port and the outside, the outer end of the first horizontal channel can be plugged by a plug, and the upper end of the first vertical channel penetrates through the top surface of the valve body and is communicated with the fourth channel.
Preferably, the second channel comprises a second horizontal channel, a damping hole and an inverted cone-shaped hole which are sequentially communicated, the second horizontal channel is arranged at the lower part of the two-way cartridge valve core, the second horizontal channel penetrates through two sides of the two-way cartridge valve core and is communicated with the side oil port, the damping hole and the inverted cone-shaped hole are sequentially arranged at the upper part in the middle of the second horizontal channel, and the inverted cone-shaped hole is communicated with the first accommodating groove.
Preferably, the damping piece is arranged at one end of the third channel communicated with the second accommodating groove.
Preferably, the third channel comprises a third vertical channel and a third horizontal channel arranged on one side of the upper part of the third vertical channel, one end of the third horizontal channel, which is far away from the third vertical channel, is communicated with the oil inlet of the direct-acting pressure valve, and the lower end of the third vertical channel is communicated with the second accommodating groove; the damping piece is a screw provided with a center hole penetrating through the upper end and the lower end, and the screw is installed at the lower end of the third vertical channel in a threaded mode.
Preferably, a second step is formed at the joint of the first mounting groove and the first oil port, the lower end of the two-way cartridge valve sleeve can be limited by the second step, the upper end of the two-way cartridge valve sleeve can be limited by the two-way cartridge valve cover, and the upper end of the two-way cartridge valve cover can be limited by the control cover plate.
Preferably, the valve sleeve of the two-way cartridge valve further comprises a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring and a fifth sealing ring, wherein a first annular groove is formed in the lower portion of the outer wall of the valve sleeve of the two-way cartridge valve, the first sealing ring is arranged in the first annular groove, the valve cover of the two-way cartridge valve comprises a top plate and an annular plate arranged on the lower portion of the top plate, a through hole is formed in the middle of the top plate, the top plate is in contact with the top surface of the valve sleeve of the two-way cartridge valve, the annular plate is sleeved on the upper portion of the valve sleeve of the two-way cartridge valve, the upper portion of the outer wall of the valve sleeve of the two-way cartridge valve is provided with the second annular groove, the second sealing ring is arranged in the second annular groove and located on the inner side of the annular plate, a third annular groove is formed in the outer wall of the annular plate, the third sealing ring is arranged in the third annular groove, a first circular groove is formed in the middle of the upper surface of the top plate, the through hole, the first circular groove is communicated with the second circular groove in sequence, and the fourth sealing ring is arranged in the first circular groove.
Preferably, the direct-acting pressure valve comprises a direct-acting pressure valve seat, a direct-acting pressure valve spool, a direct-acting pressure valve spring, a direct-acting pressure valve outer sleeve, a direct-acting pressure valve adjusting screw and a direct-acting pressure valve adjusting locking nut, wherein the oil inlet and the third accommodating groove are respectively formed in two ends of the direct-acting pressure valve seat, the oil inlet is communicated with the third accommodating groove, the oil outlet communicated with the third accommodating groove is formed in the side wall of the direct-acting pressure valve seat, one end of the direct-acting pressure valve seat, provided with the third accommodating groove, is threadedly installed in the direct-acting pressure valve outer sleeve, the direct-acting pressure valve outer sleeve is threadedly installed in the second mounting groove, the direct-acting pressure valve spool is slidably arranged in the third accommodating groove, one end of the direct-acting pressure valve spool can block the oil inlet, the other end of the direct-acting pressure valve spool is provided with the direct-acting pressure valve spring, and the direct-acting pressure valve adjusting screw is threadedly installed in the direct-acting pressure valve sleeve and can be in contact with the direct-acting pressure valve outer end surface.
Preferably, the direct-acting pressure valve further comprises a sixth sealing ring, a fourth annular groove is formed in the outer wall of the valve seat of the direct-acting pressure valve, which is close to one end of the third channel, and the sixth sealing ring is arranged in the fourth annular groove.
Preferably, the connecting assembly includes a plurality of connecting bolts, and each of the connecting bolts is sequentially installed on the control cover plate and the valve body.
The utility model discloses for prior art gain following technological effect:
the utility model discloses a guide's formula does not have leakage safety pressure valve includes the valve body, the control apron, two-way cartridge valve barrel, two-way cartridge valve case, two-way cartridge valve bonnet, two-way cartridge valve spring, direct action type pressure valve and coupling assembling, two-way cartridge valve has the oily ability of expert big, the response is fast, integrate the characteristics that the degree is high, two-way cartridge valve case slides and sets up in two-way cartridge valve barrel, the lower extreme of two-way cartridge valve case can contact and form line seal with first step, two-way cartridge valve adopts line seal structure promptly, the function of zero leakage has been ensured, through guide's level direct action type pressure valve regulation control power level two-way cartridge valve, realize safe pressure and set for, and then realized under large-scale forging and pressing equipment hydraulic system's the operating mode zero leakage and the hydraulic control of large-traffic oil extraction under safe pressure. And simultaneously, the utility model discloses a guide's formula does not have leakage safety pressure valve simple structure, the principle is clear, and the reliability is high, and the debugging is simple, and when breaking down, also easily troubleshooting problem, the convenient solution. Meanwhile, the hydraulic circuit has lower production and manufacturing cost, can be completely popularized to other similar hydraulic equipment, solves the problems of leakage in a hydraulic circuit of large forging equipment and incapability of realizing large-flow discharge under safe pressure under the condition of increasing little cost, and ensures the safety of the equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a pilot-operated leakage-free safety pressure valve provided by the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view of fig. 1 at B.
Description of reference numerals: 100. a pilot-operated non-leakage safety pressure valve; 1. a valve body; 2. a control cover plate; 3. a two-way cartridge valve sleeve; 4. a two-way cartridge valve core; 5. a two-way cartridge valve cover; 6. a two-way cartridge valve spring; 7. a first mounting groove; 8. a first oil port; 9. a second oil port; 10. a first step; 11. a second step; 12. a first horizontal channel; 13. a first vertical channel; 14. a side oil port; 15. a second horizontal channel; 16. a damping hole; 17. a reverse tapered hole; 18. a first accommodating groove; 19. a through hole; 20. a second accommodating groove; 21. a third vertical channel; 22. a third horizontal channel; 23. a damping member; 24. a second mounting groove; 25. a direct acting pressure valve seat; 26. a direct-acting pressure valve core; 27. a direct acting pressure valve spring; 28. a direct-acting pressure valve external thread sleeve; 29. a direct-acting pressure valve adjusting screw; 30. the direct-acting pressure valve adjusts the lock nut; 31. an oil inlet; 32. a third accommodating groove; 33. an oil outlet; 34. a fourth channel; 35. a first seal ring; 36. a second seal ring; 37. a third seal ring; 38. a fourth seal ring; 39. a fifth seal ring; 40. and a sixth sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a guide's formula does not have leakage safe pressure valve has solved large-scale forging and pressing equipment hydraulic circuit internal leakage and safe pressure down can't realize large-traffic exhaust problem, has ensured the equipment security.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 3, the embodiment provides a pilot-operated type leakage-free safety pressure valve 100, which includes a valve body 1, a control cover plate 2, a two-way cartridge valve sleeve 3, a two-way cartridge valve core 4, a two-way cartridge valve cover 5, a two-way cartridge valve spring 6, a direct-acting pressure valve and a connecting assembly, wherein a first oil port 8 penetrating through a bottom surface and a first mounting groove 7 penetrating through a top surface are provided in the valve body 1, the first mounting groove 7 is communicated with the first oil port 8, a second oil port 9 communicating with the first mounting groove 7 is provided at one side of the valve body 1, a first passage is provided at the other side of the valve body 1, a lower end of the first passage is communicated with the first oil port 8, an upper end of the first passage penetrates through the top surface of the valve body 1, the second oil port 9 is used for connecting a pressure oil port, the pressure oil port is a pipeline led out from a piston cylinder rod cavity or a large-volume energy storage device, the first oil port 8 is used for connecting an oil return port, and the oil return port is a pipeline connected to an oil tank. The two-way cartridge valve sleeve 3 is arranged in the first mounting groove 7, a first step 10 is arranged on the inner wall of the two-way cartridge valve sleeve 3, the two-way cartridge valve core 4 is arranged in the two-way cartridge valve sleeve 3 in a sliding mode, the bottom end of the two-way cartridge valve core 4 can be in contact with the first step 10 and forms line sealing, the first step 10 in the embodiment is an inverted conical step, and the bottom end of the two-way cartridge valve core 4 is in line contact with the inverted conical step. The side surface of the valve sleeve 3 of the two-way cartridge valve is provided with a side oil port 14, the upper part of the valve core 4 of the two-way cartridge valve is provided with a first accommodating groove 18, the lower part of the valve core 4 of the two-way cartridge valve is provided with a second channel, the second oil port 9, the side oil port 14, the second channel and the first accommodating groove 18 are sequentially communicated, the valve cover 5 of the two-way cartridge valve covers the upper part of the valve sleeve 3 of the two-way cartridge valve, and the valve cover 5 of the two-way cartridge valve is provided with a through hole 19. The control cover plate 2 is installed on the upper portion of the valve body 1 through a connecting assembly, a second accommodating groove 20 is formed in the lower portion of the control cover plate 2, one end of the two-way cartridge valve spring 6 is located in the first accommodating groove 18, the other end of the two-way cartridge valve spring 6 penetrates through the through hole 19 to extend into the second accommodating groove 20, and a control cavity is formed between the upper portion of the two-way cartridge valve core 4 and the two-way cartridge valve sleeve 3 and between the through hole 19 and the second accommodating groove 20 in the upper portion. A second mounting groove 24 is formed in one side of the control cover plate 2, the direct-acting pressure valve is arranged in the second mounting groove 24, a third channel and a fourth channel 34 are formed in the control cover plate 2, the second receiving groove 20, the third channel and an oil inlet 31 of the direct-acting pressure valve are sequentially communicated, and an oil outlet 33 of the direct-acting pressure valve, the fourth channel 34 and the upper end of the first channel are sequentially communicated. In the embodiment, the first oil port 8 and the second oil port 9 realize the opening and closing functions through the action of the two-way cartridge valve core 4, and when the two-way cartridge valve core 4 is in contact with the first step 10, the second oil port 9 is not communicated with the first oil port 8 and is in a closed state; when the valve core 4 of the two-way cartridge valve moves upwards and leaves the first step 10, the second oil port 9 is communicated with the first oil port 8 and is in an open state; the action of the two-way cartridge valve core 4 depends on whether the pressure of the hydraulic oil flowing to the oil inlet 31 of the direct-acting pressure valve can open the direct-acting pressure valve, when the pressure of the hydraulic oil flowing to the oil inlet 31 of the direct-acting pressure valve can open the direct-acting pressure valve, the high-pressure oil introduced from the pressure oil port sequentially flows through the second oil port 9, the second channel, the control cavity, the third channel, the oil inlet 31 and the oil outlet 33 of the direct-acting pressure valve, the fourth channel 34 and the first channel to enter the first oil port 8, the hydraulic oil in the control cavity flows, the pressure difference occurs in the second oil port 9 and the control cavity, and the two-way cartridge valve core 4 moves upwards and compresses the two-way cartridge valve spring 6 under the action of the pressure difference.
The first channel comprises a first vertical channel 13 and a first horizontal channel 12 arranged at the lower part of the first vertical channel 13, the first vertical channel 13 is communicated with the middle part of the first horizontal channel 12, the two ends of the first horizontal channel 12 are respectively communicated with the first oil port 8 and the outside, the outer end of the first horizontal channel 12 can be blocked by a plug, inner threads are arranged on the inner wall of the outer end of the first horizontal channel 12, the plug can be installed in the first horizontal channel 12 in a threaded manner and further blocks the outer end of the first horizontal channel 12, and the upper end of the first vertical channel 13 penetrates through the top surface of the valve body 1 and is communicated with the fourth channel 34.
The second channel comprises a second horizontal channel 15, a damping hole 16 and an inverted cone-shaped hole 17 which are sequentially communicated, two side oil ports 14 are symmetrically formed in the side face of the two-way cartridge valve sleeve 3, the second horizontal channel 15 is arranged on the lower portion of the two-way cartridge valve core 4, the second horizontal channel 15 penetrates through the two sides of the two-way cartridge valve core 4 and is communicated with the side oil ports 14, namely the two ends of the second horizontal channel 15 are respectively communicated with the two side oil ports 14, the damping hole 16 and the inverted cone-shaped hole 17 are sequentially formed in the middle upper portion of the second horizontal channel 15, and the inverted cone-shaped hole 17 is communicated with the first accommodating groove 18.
The embodiment further includes a damping member 23, and the damping member 23 is installed at one end of the third channel, which is communicated with the second receiving groove 20. The damping piece 23 is used for adjusting the opening and closing speed of the two-way cartridge valve 4, and the effect of smoothness and no impact is realized.
The third channel comprises a third vertical channel 21 and a third horizontal channel 22 arranged on one side of the upper part of the third vertical channel 21, one end of the third horizontal channel 22, which is far away from the third vertical channel 21, is communicated with an oil inlet 31 of the direct-acting pressure valve, and the lower end of the third vertical channel 21 is communicated with the second accommodating groove 20; the damping piece 23 is a screw provided with a center hole penetrating through the upper and lower ends, an inner thread is provided on the inner wall of the lower end of the third vertical passage 21, and the screw thread is installed at the lower end of the third vertical passage 21. It should be noted that screws with central holes with different inner diameters can be used as the damping member 23 according to different requirements of the opening and closing speed of the two-way cartridge valve 4.
The junction of the first mounting groove 7 and the first oil port 8 forms a second step 11, the lower end of the two-way cartridge valve sleeve 3 can be limited by the second step 11, the upper end of the two-way cartridge valve sleeve 3 can be limited by the two-way cartridge valve cover 5, and the upper end of the two-way cartridge valve cover 5 can be limited by the control cover plate 2, so that the stable mounting of the two-way cartridge valve sleeve 3 and the two-way cartridge valve cover 5 is realized.
In order to improve the sealing performance, the two-way cartridge valve further comprises a first sealing ring 35, a second sealing ring 36, a third sealing ring 37, a fourth sealing ring 38 and a fifth sealing ring 39, wherein a first annular groove is formed in the lower portion of the outer wall of the two-way cartridge valve sleeve 3, the first sealing ring 35 is arranged in the first annular groove, and the first sealing ring 35 is located between the two-way cartridge valve sleeve 3 and the valve body 1; the two-way cartridge valve cover 5 comprises a top plate and an annular plate arranged at the lower part of the top plate, the through hole 19 is arranged in the middle of the top plate, the top plate is in contact with the top surface of the two-way cartridge valve sleeve 3, the annular plate is sleeved at the upper part of the two-way cartridge valve sleeve 3, a second annular groove is arranged at the upper part of the outer wall of the two-way cartridge valve sleeve 3, a second sealing ring 36 is arranged in the second annular groove and is positioned at the inner side of the annular plate, a third annular groove is arranged on the outer wall of the annular plate, a third sealing ring 37 is arranged in the third annular groove, and the third sealing ring 37 is positioned between the annular plate and the valve body 1; the middle part of roof upper surface is provided with first circular recess, and through-hole 19, first circular recess communicate with second holding tank 20 in proper order, and fourth sealing washer 38 sets up in first circular recess, and the lower surface of control apron 2 is provided with the second circular recess, and fourth passageway 34, second circular recess and first passageway communicate in proper order, and fifth sealing washer 39 sets up in the second circular recess.
As shown in fig. 3, the direct-acting pressure valve includes a direct-acting pressure valve seat 25, a direct-acting pressure valve spool 26, a direct-acting pressure valve spring 27, a direct-acting pressure valve outer sleeve 28, a direct-acting pressure valve adjusting screw 29 and a direct-acting pressure valve adjusting locking nut 30, an oil inlet 31 and a third receiving groove 32 are respectively disposed at two ends of the direct-acting pressure valve seat 25, the oil inlet 31 is communicated with the third receiving groove 32, an oil outlet 33 communicated with the third receiving groove 32 is disposed on a side wall of the direct-acting pressure valve seat 25, the oil outlet 33, the second receiving groove 24 and the fourth channel 34 are sequentially communicated, one end of the direct-acting pressure valve seat 25, which is provided with the third receiving groove 32, is threadedly mounted in the direct-acting pressure valve outer sleeve 28, the direct-acting pressure valve outer sleeve 28 is threadedly mounted in the direct-acting pressure valve outer sleeve 24, the direct-acting pressure valve spool 26 is slidably disposed in the third receiving groove 32, one end of the direct-acting pressure valve spool 26 can be plugged by the oil inlet 31, in this embodiment, one end of the direct-acting pressure valve spool 26, which is close to the oil inlet 31, the end of the direct-acting pressure valve outer sleeve 26 is of the direct-acting pressure valve spool, the direct-acting pressure valve spool 27, the direct-acting pressure valve spool is sequentially installed in the first receiving hole, the direct-acting pressure valve outer diameter of the direct-acting pressure valve spring round hole, the direct-acting pressure valve spool 27, and the direct-acting pressure valve spring round hole, the direct-acting pressure valve spool 29, the direct-acting pressure valve spool 27, and the direct-acting pressure valve spring round hole are sequentially enlarged. The screwing of the adjusting screw 29 of the direct-acting pressure valve into the external thread bushing 28 of the direct-acting pressure valve compresses the elastic force generated on the spring 27 of the direct-acting pressure valve, which acts on the valve core 26 of the direct-acting pressure valve, so that the valve core 26 of the direct-acting pressure valve blocks the oil inlet 31 on the valve seat 25 of the direct-acting pressure valve. The force of the direct-acting pressure valve spring 27 acting on the valve element 26 of the direct-acting pressure valve, i.e., the pressure provided by the direct-acting pressure valve, can be adjusted by adjusting the screwing depth of the adjusting screw 29 of the direct-acting pressure valve.
The embodiment further comprises a sixth sealing ring 40, a fourth annular groove is formed in the outer wall of the end, close to the third channel, of the direct-acting pressure valve seat 25, the sixth sealing ring 40 is arranged in the fourth annular groove, and the sixth sealing ring 40 is located between the direct-acting pressure valve seat 25 and the control cover plate 2.
In this embodiment, the connection assembly includes a plurality of connection bolts, and each connection bolt is installed on the control cover plate 2 and the valve body 1 in sequence. Specifically, each connecting bolt passes through the control cover plate 2 and is installed in a threaded hole of the valve body 1.
During operation, high-pressure oil is introduced from a rod cavity of a piston oil cylinder of the large forging equipment through a pressure oil port and enters the first oil port 8, the hydraulic oil of the first oil port 8 flows through the second channel through the side oil port 14, namely, the hydraulic oil sequentially passes through the second horizontal channel 15, the damping hole 16 and the inverted cone-shaped hole 17 and enters the control cavity, the hydraulic oil of the control cavity flows to the oil inlet 31 of the direct-acting pressure valve through the third channel on the control cover plate 2, and the hydraulic oil flows through the damping piece 23 when passing through the third channel in the process. If the pressure when the hydraulic oil flowing from the pressure oil port flows to the oil inlet 31 of the direct-acting pressure valve exceeds the pressure provided by the direct-acting pressure valve, the pressure can overcome the force applied to the valve core 26 of the direct-acting pressure valve by the spring 27 of the direct-acting pressure valve, so that the valve core 26 of the direct-acting pressure valve is separated from the oil inlet 31, the direct-acting pressure valve is opened at the moment, namely, the oil inlet 31 and the oil outlet 33 of the direct-acting pressure valve are communicated, the hydraulic oil can sequentially flow back to the first oil port 8 through the oil inlet 31, the oil can sequentially flow back to the first oil port 33, the hydraulic oil enters the oil tank through the oil return port, the hydraulic oil in the control chamber flows, the pressure difference occurs between the second oil port 9 and the control chamber, the hydraulic oil in the second oil port 9 pushes the valve core 4 of the two-way cartridge valve to move upwards, the second oil port 9 is communicated with the first oil port 8, and the high-pressure oil in the pressure oil port realizes the function of high-pressure overflow. If the pressure when the hydraulic oil flowing from the pressure oil port flows to the oil inlet 31 of the direct-acting pressure valve is lower than the pressure provided by the direct-acting pressure valve, the direct-acting pressure valve keeps closed, the pressure of the hydraulic oil in the control cavity keeps unchanged, the hydraulic oil in the second oil port 9 cannot open the two-way cartridge valve core 4, the second oil port 9 and the first oil port 8 are always closed, the high-pressure oil in the pressure oil ports does not leak, the pressure can be kept, the zero-leakage function under the safe pressure is realized, the zero-leakage and instant large-flow discharge control process of the rod cavity of the piston oil cylinder of the large forging equipment is stable and reliable, the position of the zero-leakage movable beam under the safe pressure keeps unchanged, the oil can be instantly discharged in a large-flow manner to return to the oil tank when the internal pressure of the oil cylinder suddenly exceeds the safe pressure due to external force, the response of the two-way cartridge valve core 4 is opened sensitively, and the pilot-type non-leakage safety pressure valve 100 completely meets the process requirements of large forging equipment, the energy storage of the large-volume pressure container and the like.
Therefore, the two-way cartridge valve in the embodiment adopts a linear sealing structure, the zero leakage function is ensured, the safety pressure setting is realized by adjusting and controlling the power level two-way cartridge valve through the pilot level direct-acting pressure valve, and the hydraulic control of zero leakage and high-flow oil discharge under the safety pressure under the working condition of a hydraulic system of large forging equipment is further realized. The pilot-operated type leakage-free safety pressure valve 100 in the embodiment has the advantages of simple structure, clear principle, high reliability, simple debugging, easy troubleshooting when a fault occurs, and convenience in solving. Meanwhile, the hydraulic circuit has the advantages of low production and manufacturing cost, wide application range, high stability and high adaptability, can be completely popularized to other similar hydraulic equipment, solves the problems of leakage in a hydraulic circuit of large forging equipment and incapability of realizing large-flow discharge under the condition of safe pressure under the condition of increasing little cost, and ensures the safety of the equipment.
The principle and the implementation of the present invention are explained by applying specific examples in this specification, and the above descriptions of the examples are only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. A pilot-operated type leakage-free safety pressure valve is characterized by comprising a valve body, a control cover plate, a two-way cartridge valve sleeve, a two-way cartridge valve core, a two-way cartridge valve cover, a two-way cartridge valve spring, a direct-acting pressure valve and a connecting assembly, wherein a first oil port penetrating through the bottom surface and a first mounting groove penetrating through the top surface are arranged in the valve body, the first mounting groove is communicated with the first oil port, a second oil port communicated with the first mounting groove is arranged at one side of the valve body, a first channel is arranged at the other side of the valve body, the lower end of the first channel is communicated with the first oil port, the upper end of the first channel penetrates through the top surface of the valve body, the two-way cartridge valve sleeve is arranged in the first mounting groove, the two-way cartridge valve comprises a valve sleeve, a valve core, a valve seat, a valve cover, a valve seat, a valve core, a side oil port, a first accommodating groove, a second channel, a first oil port, a second oil port, a side oil port, a second channel and a first accommodating groove, wherein the inner wall of the valve sleeve of the two-way cartridge valve is provided with a first step, the valve core of the two-way cartridge valve is arranged in the valve sleeve of the two-way cartridge valve in a sliding mode, the bottom end of the valve core of the two-way cartridge valve can be in contact with the first step to form linear sealing, the side oil port is arranged on the side surface of the valve sleeve of the two-way cartridge valve, the second channel is communicated with the first accommodating groove in sequence, the valve cover of the two-way cartridge valve is arranged on the upper portion of the valve sleeve of the two-way cartridge valve, and a through hole is arranged on the valve cover of the two-way cartridge valve; the control cover plate is installed on the upper portion of the valve body through a connecting assembly, a second accommodating groove is formed in the lower portion of the control cover plate, one end of a two-way cartridge valve spring is located in the first accommodating groove, the other end of the two-way cartridge valve spring penetrates through the through hole and extends into the second accommodating groove, a second mounting groove is formed in one side of the control cover plate, the direct-acting pressure valve is arranged in the second mounting groove, a third channel and a fourth channel are arranged in the control cover plate, the second accommodating groove, the third channel and an oil inlet of the direct-acting pressure valve are sequentially communicated, and an oil outlet of the direct-acting pressure valve, the fourth channel and the upper end of the first channel are sequentially communicated.
2. The pilot-operated leakage-free safety pressure valve according to claim 1, wherein the first passage comprises a first vertical passage and a first horizontal passage disposed at a lower portion of the first vertical passage, two ends of the first horizontal passage are respectively communicated with the first oil port and the outside, an outer end of the first horizontal passage can be blocked by a plug, and an upper end of the first vertical passage penetrates through a top surface of the valve body and is communicated with the fourth passage.
3. The pilot-operated leakage-free safety pressure valve according to claim 1, wherein the second passage comprises a second horizontal passage, a damping hole and an inverted cone-shaped hole which are sequentially communicated, the second horizontal passage is arranged at the lower part of the two-way cartridge valve core, the second horizontal passage penetrates through two sides of the two-way cartridge valve core and is communicated with the side oil port, the damping hole and the inverted cone-shaped hole are sequentially arranged at the upper part of the middle of the second horizontal passage, and the inverted cone-shaped hole is communicated with the first accommodating groove.
4. The pilot-operated leakage-free safety pressure valve as claimed in claim 1, further comprising a damping member installed at an end of the third passage communicating with the second receiving groove.
5. The pilot-operated leakage-free safety pressure valve according to claim 4, wherein the third channel comprises a third vertical channel and a third horizontal channel arranged at one side of the upper part of the third vertical channel, one end of the third horizontal channel far away from the third vertical channel is communicated with the oil inlet of the direct-acting pressure valve, and the lower end of the third vertical channel is communicated with the second accommodating groove; the damping piece is a screw provided with a center hole penetrating through the upper end and the lower end, and the screw is installed at the lower end of the third vertical channel in a threaded mode.
6. The pilot-operated leakage-free safety pressure valve as claimed in claim 1, wherein a junction of the first mounting groove and the first oil port forms a second step, a lower end of the valve housing of the two-way cartridge valve is capable of being limited by the second step, an upper end of the valve housing of the two-way cartridge valve is capable of being limited by the valve cover of the two-way cartridge valve, and an upper end of the valve cover of the two-way cartridge valve is capable of being limited by the control cover plate.
7. The pilot-operated leakage-free safety pressure valve as claimed in claim 1, further comprising a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring and a fifth sealing ring, wherein a first annular groove is formed in a lower portion of an outer wall of the two-way cartridge valve housing, the first sealing ring is disposed in the first annular groove, the two-way cartridge valve cover comprises a top plate and an annular plate disposed at a lower portion of the top plate, the through hole is disposed in a middle portion of the top plate, the top plate contacts with a top surface of the two-way cartridge valve housing, the annular plate is sleeved on an upper portion of the two-way cartridge valve housing, a second annular groove is disposed on an upper portion of the outer wall of the two-way cartridge valve housing, the second sealing ring is disposed in the second annular groove and located on an inner side of the annular plate, the third sealing ring is disposed in the annular plate, a first circular groove is disposed in a middle portion of an upper surface of the top plate, the through hole, the first circular groove and the second circular groove are sequentially communicated, the fourth sealing ring is disposed in the first circular groove, a second circular groove is sequentially communicated with the fifth sealing ring.
8. The pilot-operated type non-leakage safety pressure valve according to claim 1, wherein the direct-acting type pressure valve comprises a direct-acting type pressure valve seat, a direct-acting type pressure valve spool, a direct-acting type pressure valve spring, a direct-acting type pressure valve outer sleeve, a direct-acting type pressure valve adjusting screw rod and a direct-acting type pressure valve adjusting locking nut, the oil inlet and the third accommodating groove are respectively formed at two ends of the direct-acting type pressure valve seat, the oil inlet is communicated with the third accommodating groove, the oil outlet communicated with the third accommodating groove is formed in the side wall of the direct-acting type pressure valve seat, one end of the direct-acting type pressure valve seat provided with the third accommodating groove is threadedly installed in the direct-acting type pressure valve outer sleeve, the direct-acting type pressure valve outer sleeve is threadedly installed in the second installation groove, the direct-acting type pressure valve spool is slidingly installed in the third accommodating groove, one end of the direct-acting type pressure valve spool can seal the oil inlet, the other end of the direct-acting type pressure valve spool is threadedly installed in the direct-acting type pressure valve outer sleeve, and the direct-acting type pressure valve adjusting screw rod is in contact with the direct-acting type pressure valve outer end surface of the direct-acting type pressure valve adjusting nut.
9. The pilot-operated leakage-free safety pressure valve according to claim 8, further comprising a sixth sealing ring, wherein a fourth annular groove is formed in an outer wall of the valve seat of the direct-acting pressure valve, which is close to one end of the third channel, and the sixth sealing ring is arranged in the fourth annular groove.
10. The piloted leak-free safety pressure valve of claim 1, wherein the connection assembly comprises a plurality of connection bolts, each of which is mounted in turn to the control cover plate and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222994489.1U CN218440002U (en) | 2022-11-10 | 2022-11-10 | Pilot-operated type leakage-free safety pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222994489.1U CN218440002U (en) | 2022-11-10 | 2022-11-10 | Pilot-operated type leakage-free safety pressure valve |
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| Publication Number | Publication Date |
|---|---|
| CN218440002U true CN218440002U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222994489.1U Active CN218440002U (en) | 2022-11-10 | 2022-11-10 | Pilot-operated type leakage-free safety pressure valve |
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| CN (1) | CN218440002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116498614A (en) * | 2023-04-24 | 2023-07-28 | 通用技术集团大连机床有限责任公司 | Normally open type large-flux two-way cartridge valve |
-
2022
- 2022-11-10 CN CN202222994489.1U patent/CN218440002U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116498614A (en) * | 2023-04-24 | 2023-07-28 | 通用技术集团大连机床有限责任公司 | Normally open type large-flux two-way cartridge valve |
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