A high-pressure overflow valve with an oil replenishing function

Abstract

The present application provides a high-pressure overflow valve with an oil replenishment function, which relates to the technical field of valves. The high-pressure overflow valve with an oil replenishment function includes: an overflow valve housing assembly, an overflow valve core assembly, and a spring force adjustment assembly. An overflow port is provided outside the main valve body, and a leakage port is provided outside the pilot valve body. The valve sleeve is fixed at the inner end of the main valve body, and an oil outlet hole communicating with the leakage port is provided outside the valve sleeve. An inclined surface, an arc-shaped ring groove, and a ring surface are integrally formed on the outer wall of the main valve core. The support and the pilot valve core are both axially movably arranged inside the pilot valve body and elastically supported by a second spring. The oil passing through the overflow port squeezes the main valve core backward through the arc-shaped ring groove and the ring surface outside the main valve core, and the oil inside the fuel tank will flow back to the inside of the pipeline system through the overflow port, completing the self-return of the oil overflowing into the fuel tank to the inside of the pipeline system when the oil pressure inside the fuel tank is higher than that of the pipeline system.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and more specifically, to a high-pressure overflow valve with an oil replenishing function. Background Art

[0002] The pilot-operated high-pressure overflow valve mainly consists of a main valve and a pilot valve, which is a closing and opening device used for full opening and full closing. During operation, the hydraulic pressure acts on the end pressure surfaces of both the main valve core and the pilot valve core simultaneously. When the pilot valve is not opened, the oil in the valve cavity does not flow, and the pressures acting on the inner cavity and the external port of the main valve core are equal, and the valve port is in a closed state. When the inlet oil pressure increases to open the pilot valve, the liquid flows back to the fuel tank through the intermediate hole on the main valve core and the pilot valve. At this time, the oil in the inner cavity of the main valve core circulates, resulting in a pressure drop, creating a pressure difference between the oil in the inner cavity and the oil in the external port. The main valve core moves to achieve overflow and maintain the pressure basically stable. However, the pilot overflow valve in the related art cannot yet achieve the function of self-return oil replenishment when the oil pressure inside the fuel tank is higher than the oil in the pipeline. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present application provides a high-pressure overflow valve with an oil replenishing function to solve the problem that the pilot overflow valve in the related art cannot complete self-return oil replenishment when the oil pressure inside the fuel tank is higher than the oil in the pipeline.

[0004] A high-pressure overflow valve with an oil replenishing function according to an embodiment of the present application includes: an overflow valve housing assembly, an overflow valve core assembly, and a spring force adjustment assembly.

[0005] The overflow valve housing assembly includes a main valve body and a pilot valve body. The main valve body is detachably connected to the pilot valve body. An overflow port is provided outside the main valve body, and a leakage port is provided outside the pilot valve body.

[0006] The overflow valve core assembly includes a main valve core, a valve sleeve, a pilot valve core, and a support. The valve sleeve is fixed at the inner end of the main valve body, and an oil outlet hole communicating with the leakage port is provided outside the valve sleeve. The main valve core is axially movably arranged inside the main valve body and is elastically supported by a first spring. An inclined surface, an arc-shaped ring groove, and a ring surface are integrally formed on the outer wall of the main valve core. The support and the pilot valve core are both axially movably arranged inside the pilot valve body and are elastically supported by a second spring.

[0007] The spring force adjustment assembly is installed at the end of the pilot valve body to axially move and adjust the support.

[0008] Preferably, the spring force adjustment assembly includes a nut and an adjustment screw. The nut is fixed at the end of the pilot valve body, and the adjustment screw is installed in screw-threaded engagement with the nut.

[0009] Preferably, a pyramid hole that mates with a disassembly and assembly tool is provided at one end of the adjusting screw away from the support.

[0010] Preferably, the overflow valve housing assembly further includes a first sealing ring, which is arranged between the outer wall of the main valve body and the inner wall of the pilot valve body.

[0011] The high-pressure overflow valve with oil replenishing function further includes a distance auxiliary adjustment assembly, which includes an electromagnetic suction member and a third spring. An installation groove is provided on the end face of the valve sleeve close to the first spring, and a limiting groove is provided on the bottom wall of the installation groove. One end of the third spring is inserted into the limiting groove, and the other end of the third spring elastically supports the electromagnetic suction member located inside the installation groove. One end face of the electromagnetic suction member elastically supports the first spring.

[0012] Preferably, the electromagnetic suction member includes an annular shell, an electromagnet, a mobile power source, a signal receiving switch module and a positioning block. The electromagnet is arranged at the middle position of the annular structure inside the annular shell, the mobile power source is arranged at the outer circumferential wall inside the annular shell, and the signal receiving switch module and the positioning block are respectively installed at the position close to the inner circumferential wall inside the annular shell.

[0013] Preferably, a limiting ring plate for limiting the electromagnetic suction member is detachably fixed to the end of the valve sleeve close to the main valve core by a first fixing bolt.

[0014] Preferably, the overflow valve core assembly further includes a second sealing ring, which is arranged between the outer wall of the main valve core and the inner wall of the main valve body.

[0015] Preferably, the overflow valve core assembly further includes a third sealing ring, which is arranged between the outer wall of the valve sleeve and the inner wall of the pilot valve body.

[0016] Preferably, the overflow valve core assembly further includes a fourth sealing ring, which is arranged between the outer wall of the support and the inner wall of the pilot valve body.

[0017] Preferably, the elastic force adjustment assembly includes a motor, a threaded rod, a support sleeve and a connecting column. The motor is fixed to the tail end of the pilot valve body by a second fixing bolt. The support sleeve is sleeved outside the screw rod of the second fixing bolt located between the motor and the pilot valve body. The threaded rod is screwed and installed on the support support at the tail end of the pilot valve body. A cylindrical groove is provided inside the threaded rod, and a limiting strip groove is provided on the inner wall of the cylindrical groove. One end of the connecting column is connected to the output shaft end of the motor. The connecting column is movably inserted into the cylindrical groove, and a limiting strip block that mates with the limiting strip groove is fixedly arranged on the outer wall of the connecting column.

[0018] The high-pressure overflow valve with an oil replenishment function further includes a conduit member, which includes a diversion pipe, a solid rod, a connecting rod, and an axially moving connecting member. The diversion pipe and the solid rod are integrally formed. The axially moving connecting member connects the solid rod and the connecting rod. Through holes are provided on the threaded rod, the pilot valve core, and the valve sleeve. A jack is provided on the end face of the connecting column. One end of the connecting rod away from the axially moving connecting member is inserted into the jack and fixed by a third fixing bolt. A threaded hole is provided in the middle hole inside the main valve core. The end of the diversion pipe is provided with an external thread that matches the threaded hole. First liquid outlet holes and second liquid outlet holes are respectively provided on the outer part of the diversion pipe. A first guiding groove is formed on the inner wall of the main valve body. A first guiding block that is slidably matched with the first guiding groove is fixed on the outer wall of the main valve core.

[0019] Preferably, the axially moving connecting member includes a sleeve and a second guiding block. A second guiding groove is provided on the outer part of the sleeve. One end of the sleeve is connected to the end of the solid rod away from the external thread. One end of the connecting rod is movably inserted into the sleeve. A second guiding block that is slidably matched with the second guiding groove is provided on the outer side of the end of the connecting rod.

[0020] The beneficial effect of this application is that: a high-pressure overflow valve with an oil replenishment function obtained through the above design in this application can not only complete the oil liquid in the pilot overflow pipeline system. And when the oil pressure in the pipeline system is lower than the oil pressure inside the fuel tank, the oil liquid inside the fuel tank enters the overflow port. At this time, the oil liquid passing through the overflow port squeezes the main valve core backward through the arc-shaped annular groove and the annular surface outside the main valve core. A gap is generated between the flange inside the main valve body and the inclined surface outside the main valve core. The oil liquid inside the fuel tank will flow back to the inside of the pipeline system through the overflow port, completing the self-return of the oil liquid overflowing into the fuel tank to the inside of the pipeline system when the oil pressure inside the fuel tank is higher than that of the pipeline system.

[0021] Additional aspects and advantages of this application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required to be used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural diagram of a high-pressure overflow valve with an oil replenishment function according to an embodiment of this application;

[0024] Figure 2 is according to an embodiment of this applicationFigure 1 Schematic diagram of the partial enlarged structure of part A

[0025] Figure 3 Schematic diagram of the structure of a high-pressure overflow valve with an oil replenishing function according to another embodiment of the present application

[0026] Figure 4 Schematic diagram of the structure of the main valve body, main spool, first spring, valve sleeve, pilot spool and distance auxiliary adjustment assembly according to an embodiment of the present application

[0027] Figure 5 Schematic diagram of the installation structure of the valve sleeve and the distance auxiliary adjustment assembly according to an embodiment of the present application

[0028] Figure 6 Schematic diagram of the electromagnetic attracting member according to an embodiment of the present application

[0029] Figure 7 Schematic diagram of the elastic force adjustment assembly according to another embodiment of the present application

[0030] Figure 8 Schematic diagram of the conduit member according to an embodiment of the present application

[0031] Figure 9 Schematic diagram of the connecting rod and the second guide block according to an embodiment of the present application

[0032] Figure 10 Schematic diagram of the sleeve and the solid rod according to an embodiment of the present application

[0033] Figure 11 According to an embodiment of the present application Figure 8 Schematic diagram of the partial enlarged structure of part B

[0034] Figure 12 According to an embodiment of the present application Figure 8 Schematic diagram of the partial enlarged structure of part C

[0035] Figure 13 According to an embodiment of the present application Figure 8 Schematic diagram of the partial enlarged structure of part D

[0036] Figure 14 Schematic diagram of the cross-sectional structure of the connection section of the diversion pipe and the solid rod according to an embodiment of the present application

[0037] Reference numerals:

[0038] 1 - Overflow valve housing assembly; 11 - Main valve body; 12 - Pilot valve body; 13 - Leakage port; 14 - Overflow port; 15 - First sealing ring; 16 - First guide groove; 2 - Overflow valve core assembly; 21 - Main valve core; 211 - Inclined surface; 212 - Arc-shaped ring groove; 213 - Ring surface; 214 - Threaded hole; 215 - First guide block; 22 - First spring; 23 - Valve sleeve; 231 - Oil outlet hole; 232 - Limit ring plate; 233 - Installation groove; 234 - First fixing bolt; 235 - Limit groove; 24 - Pilot valve core; 241 - Through hole; 25 - Second spring; 26 - Support; 27 - Second sealing ring; 28 - Third sealing ring; 29 - Fourth sealing ring; 3 - Elasticity adjustment assembly; 301 - Nut; 302 - Adjusting screw; 311 - Motor; 312 - Threaded rod; 313 - Second fixing bolt; 314 - Support sleeve; 315 - Connecting column; 316 - Limit strip block; 317 - Cylindrical groove; 318 - Insertion hole; 319 - Limit strip groove; 4 - Distance auxiliary adjustment assembly; 41 - Electromagnetic absorber; 411 - Ring shell; 412 - Electromagnet; 413 - Mobile power source; 414 - Signal receiving switch module; 415 - Positioning block; 42 - Third spring; 5 - Duct component; 51 - Diversion pipe; 52 - Solid rod; 53 - Connecting rod; 54 - Axial movement connecting piece; 541 - Sleeve; 542 - Second guide groove; 543 - Second guide block; 55 - Third fixing bolt; 56 - External thread; 57 - First liquid outlet hole; 58 - Second liquid outlet hole. Detailed implementation manners

[0039] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] A high-pressure overflow valve with an oil replenishment function according to an embodiment of the present application will be described below with reference to the drawings.

[0043] Please refer toFigures 1 - 2 According to an embodiment of the present application, a high-pressure overflow valve with an oil replenishing function includes an overflow valve housing assembly 1, an overflow valve spool assembly 2, and a spring force adjusting assembly 3.

[0044] Among them, through the settings of the overflow valve housing assembly 1, the overflow valve spool assembly 2, and the spring force adjusting assembly 3, the high-pressure overflow valve can not only achieve pilot overflow into the fuel tank, but also when the hydraulic pressure of the oil at the valve port (oil circuit system) is less than the hydraulic pressure of the oil inside the fuel tank, the oil inside the fuel tank can flow back by itself and replenish the pipeline system from the port.

[0045] The overflow valve housing assembly 1 includes a main valve body 11 and a pilot valve body 12. The main valve body 11 and the pilot valve body 12 are detachably connected, and the main valve body 11 and the pilot valve body 12 can be disassembled and assembled by screwing. An overflow port 14 is provided outside the main valve body 11, and a leakage port 13 is provided outside the pilot valve body 12. The overflow valve spool assembly 2 includes a main spool 21, a valve sleeve 23, a pilot spool 24, and a support 26. The valve sleeve 23 is fixed at the inner end of the main valve body 11, and an oil outlet hole 231 communicating with the leakage port 13 is provided outside the valve sleeve 23. The main spool 21 is axially movably arranged inside the main valve body 11 and elastically supported by a first spring 22. An inclined surface 211, an arc-shaped ring groove 212, and a ring surface 213 are integrally formed on the outer wall of the main spool 21. The inclined surface 211 outside the main spool 21 abuts against the flange on the inner wall of the main valve body 11 to block the port at the end of the main valve body 11 and the overflow port 14. The support 26 and the pilot spool 24 are both axially movably arranged inside the pilot valve body 12 and elastically supported by a second spring 25;

[0046] The spring force adjusting assembly 3 is installed at the end of the pilot valve body 12 and axially moves to adjust the support 26.

[0047] The overflow principle of the high-pressure overflow valve with oil replenishment function is as follows: The oil in the pipeline system enters the cavity inside the main spool 21 through the middle hole inside the main spool 21, and the oil inside the main spool 21 then enters the cavity inside the pilot spool 24 at the front end of the valve sleeve 23 through the through-hole in the middle of the valve sleeve 23. That is, at this time, the oil pressure in the cavity inside the main spool 21 and the oil pressure in the cavity inside the valve sleeve 23 are both the same as the oil pressure in the pipeline system. When the oil pressure in the pipeline system is higher than the critical value, the oil inside the main spool 21 will enter the cavity inside the valve sleeve 23 through the through-hole in the middle of the valve sleeve 23 to squeeze the pilot spool 24. The second spring 25 at the rear of the pilot spool 24 is compressed under pressure until the pilot spool 24 retracts, and the oil inside the valve sleeve 23 finally flows into the inside of the fuel tank through the oil outlet hole 231 on one side of the valve sleeve 23 and then through the leakage port 13. At this time, the oil flow pressure inside the main spool 21 decreases, and the oil pressure in the pipeline system is higher than the oil pressure inside the main spool 21. The oil inside the pipeline system squeezes the main spool 21 and the first spring 22, and a gap is generated between the flange inside the main valve body 11 and the inclined surface 211 outside the main spool 21. The overpressure oil in the pipeline system finally quickly flows into the fuel tank through the overflow port 14 on the outside of the main valve body 11, completing the high-pressure overflow operation of the pipeline system.

[0048] The oil replenishment principle of the high-pressure overflow valve with oil replenishment function is as follows: When the oil pressure in the pipeline system is lower than the oil pressure inside the fuel tank, the oil inside the fuel tank enters the overflow port 14 and the arc-shaped ring groove 212 outside the main spool 21. At this time, the oil inside the fuel tank will squeeze the arc-shaped ring groove 212 outside the main spool 21 and the ring surface 213 on one side through the overflow port 14. Among them, the arc-shaped area of the arc-shaped ring groove 212 near the rear end of the main spool 21 is more than the arc-shaped area near the front end of the main spool 21, and the ring surface 213 is integrally formed with the arc-shaped ring groove 212 at the rear side of the arc-shaped ring groove 212. That is, at this time, the oil passing through the overflow port 14 squeezes the inclined surface 211 backward through the arc-shaped ring groove 212 and the ring surface 213 outside the main spool 21, causing the first spring 22 in the cavity inside the main spool 21 to be compressed. A gap is generated between the flange inside the main valve body 11 and the inclined surface 211 outside the main spool 21, and the oil inside the fuel tank will flow back into the pipeline system through the overflow port 14, completing the self-return of the oil that has overflowed into the fuel tank to the pipeline system when the oil pressure inside the fuel tank is higher than that of the pipeline system.

[0049] During specific setting, the elastic force adjusting component 3 includes a nut 301 and an adjusting screw 302. The nut 301 is fixed at the tail end of the pilot valve body 12, and the adjusting screw 302 is installed in a screwed fit with the nut 301. By rotating the adjusting screw 302 in the elastic force adjusting component 3, under the screwed fit of the adjusting screw 302 and the nut 301, the pressure of the second spring 25 on the pilot valve core 24 can be adjusted according to requirements, that is, it is used to adjust the hydraulic oil pressure in the pipeline system to push the pilot valve core 24 to move near the specified pressure range, and the hydraulic oil inside the pipeline system is released from the overflow port 14 to the inside of the fuel tank.

[0050] Further, a pyramid hole that cooperates with a disassembly and assembly tool is provided at one end of the adjusting screw 302 away from the support 26. The pyramid hole can be a conventional regular hexagonal hole. After inserting an appropriate tool into the pyramid hole and rotating the adjusting screw 302, the elasticity of the second spring 25 supporting the pilot valve core 24 can be adjusted, that is, the hydraulic oil overflow pressure range can be adjusted.

[0051] When the hydraulic oil pressure inside the fuel tank of the above high-pressure overflow valve with a oil replenishing function is higher than the hydraulic oil pressure in the pipeline system, the hydraulic oil inside the fuel tank flows back to the pipeline system through the overflow port 14. The oil pressure inside the fuel tank gradually decreases. Under the elastic force support of the first spring 22, the gap between the flange inside the main valve body 11 and the inclined surface 211 outside the main valve core 21 gradually becomes smaller. The flow rate of the hydraulic oil flowing back from the overflow port 14 also gradually decreases, and the oil replenishment also gradually slows down.

[0052] Please refer to Figure 3 、 Figure 4 and Figure 5 . The high-pressure overflow valve with an oil replenishing function further includes a distance auxiliary adjusting component 4. The distance auxiliary adjusting component 4 includes an electromagnetic absorber 41 and a third spring 42. An installation groove 233 is provided on the end face of the valve sleeve 23 close to the first spring 22, and a limiting groove 235 is provided on the bottom wall of the installation groove 233. One end of the third spring 42 is inserted into the limiting groove 235, and the other end of the third spring 42 elastically supports the electromagnetic absorber 41 located inside the installation groove 233. One end face of the electromagnetic absorber 41 elastically supports the first spring 22.

[0053] A first pressure monitoring sensor is preset in the system pipeline of the overflow valve, and a second pressure monitoring sensor is arranged in the fuel tank. When the pressure difference between the hydraulic oil in the pipeline system and the hydraulic oil in the fuel tank is within the preset hydraulic oil difference range, the electromagnetic suction member 41 is in an unpowered state, and the main spool 21 is elastically and stably supported by the third spring 42, the electromagnetic suction member 41, and the first spring 22, so that the inclined surface 211 on the outside of the main spool 21 fits with the flange inside the main valve body 11 and is in a sealed state. When the pressure difference between the hydraulic oil in the pipeline system and the hydraulic oil in the fuel tank exceeds the preset difference, the system controls the electromagnetic suction member 41 to be powered on, and magnetic forces will be generated on both end faces of the electromagnetic suction member 41. That is, one end face of the electromagnetic suction member 41 will magnetically adsorb the third spring 42 and the bottom wall of the installation groove 233 at the same time, and the other end face of the electromagnetic suction member 41 magnetically adsorbs the first spring 22. When the electromagnetic suction member 41 magnetically adsorbs the bottom wall of the installation groove 233 and the third spring 42, the third spring 42 on one side will be compressed. At this time, the hydraulic oil inside the fuel tank can more easily pressurize the main spool 21 to compress the first spring 22 and the third spring 42, so that a larger gap will be generated between the inner flange of the main valve body 11 and the inclined surface 211 on the outside of the main spool 21, and the hydraulic oil inside the fuel tank can more easily flow back quickly through the overflow port 14 to supplement the inside of the pipeline system.

[0054] Please refer to Figure 6 , if the above electromagnetic suction member 41 adopts a conventional electromagnetic member structure with wires inserted, the wires will pass through the valve sleeve 23 and the pilot valve body 12, which will cause great difficulties in valve perforation processing and sealing processing. Therefore, the present application provides another implementation manner. The electromagnetic suction member 41 includes a ring shell 411, an electromagnet 412, a mobile power source 413, a signal receiving switch module 414, and a positioning block 415. The electromagnet 412 is arranged at the middle position of the internal annular structure of the ring shell 411, and the mobile power source 413 is arranged at the outer wall of the inner ring of the ring shell 411. The signal receiving switch module 414 and the positioning block 415 are respectively installed near the inner wall of the ring shell 411.

[0055] When the oil pressure in the system pipeline monitored in the system is less than the difference between the hydraulic oil in the fuel tank and exceeds the preset value, the control system will remotely control the signal receiving switch module 414 to turn on the electromagnet 412 wirelessly. The mobile power source 413 inside the ring shell 411 can supply power to the electromagnet 412 to complete the adsorption of the third spring 42 and the first spring 22. That is, the remote control is completed to adjust the pressure of the third spring 42 and the first spring 22 on the main spool 21. There is no need to connect the electromagnet 412 with wires, which makes the overall valve structure have better sealing performance, and there is no need to install wires, making the disassembly and assembly between components more convenient and fast. The ring shell 411 can be sealed and detachable, and later the electromagnetic suction member 41 can be quickly replaced as a whole. The replaced electromagnetic suction member 41 can return to the factory to replace the internal mobile power source 413 and can continue to be used later.

[0056] Furthermore, one end of the valve sleeve 23 close to the main spool 21 is detachably fixed with a limiting ring plate 232 of the limiting electromagnetic suction member 41 through a first fixing bolt 234. The limiting ring plate 232 can be used to limit the movable installation of the limiting electromagnetic suction member 41 inside the installation groove 233. Among them, the limiting ring plate 232 is made of non-magnetic material, that is, it will not be affected by the magnetic attraction of the electromagnetic suction member 41 while limiting the electromagnetic suction member 41.

[0057] Specifically, please refer to Figure 1 , the overflow valve housing assembly 1 further includes a first sealing ring 15, and the first sealing ring 15 is arranged between the outer wall of the main valve body 11 and the inner wall of the pilot valve body 12. The overflow spool assembly 2 further includes a second sealing ring 27, and the second sealing ring 27 is arranged between the outer wall of the main spool 21 and the inner wall of the main valve body 11. The overflow spool assembly 2 further includes a third sealing ring 28, and the third sealing ring 28 is arranged between the outer wall of the valve sleeve 23 and the inner wall of the pilot valve body 12. The overflow spool assembly 2 further includes a fourth sealing ring 29, and the fourth sealing ring 29 is arranged between the outer wall of the support 26 and the inner wall of the pilot valve body 12. The settings of the first sealing ring 15, the second sealing ring 27, the third sealing ring 28, and the fourth sealing ring 29 are to improve the overall sealing effect of the overflow valve structure. The first sealing ring 15, the second sealing ring 27, the third sealing ring 28, and the fourth sealing ring 29 are all made of conventional sealing materials, and corresponding grooves are provided between the internal structures of the valve body for installing the corresponding sealing rings.

[0058] In the above high-pressure overflow valve with oil replenishment function, through the cooperation between the distance auxiliary adjustment assembly 4 and the valve assembly, when the oil in the fuel tank flows back through the overflow port 14, there is a larger gap between the inner flange of the main valve body 11 and the outer inclined surface 211 of the main spool 21, which improves the oil return and replenishment speed. However, as the pressure difference between the oil pressure in the fuel tank and the oil pressure in the pipeline system decreases, the gap between the inner flange of the main valve body 11 and the outer inclined surface 211 of the main spool 21 will still decrease to a certain extent, affecting the oil return and replenishment speed.

[0059] The present application further provides an implementation manner. Please refer to Figure 3 and Figure 7, the elastic force adjusting component 3 includes a motor 311, a threaded rod 312, a support sleeve 314 and a connecting column 315. The motor 311 is fixed to the tail end of the pilot valve body 12 by a second fixing bolt 313. The support sleeve 314 is sleeved outside the screw rod of the second fixing bolt 313 located between the motor 311 and the pilot valve body 12. The threaded rod 312 is screwed and installed on the support seat 26 at the tail end of the pilot valve body 12. A cylindrical groove 317 is provided inside the threaded rod 312, and a limiting strip groove 319 is provided on the inner wall of the cylindrical groove 317. One end of the connecting column 315 is connected to the output shaft end of the motor 311. The connecting column 315 is movably inserted inside the cylindrical groove 317, and a limiting strip block 316 that cooperates with the limiting strip groove 319 is fixedly provided on the outer wall of the connecting column 315. The connecting column 315 and the limiting strip block 316 can be integrally formed.

[0060] In this embodiment under application, the main body of the elastic force adjusting component 3 is composed of a motor 311, a threaded rod 312, a connecting column 315 and a limiting strip block 316.

[0061] When it is necessary to adjust the elastic force of the second spring 25 for supporting the pilot valve core 24, the circuit system controls the motor 311 in the elastic force adjusting component 3 to drive the connecting column 315 to rotate. The rotating connecting column 315 will also drive the threaded rod 312 to rotate through the cooperation between the limiting strip block 316 and the limiting strip groove 319. The rotating threaded rod 312 will also move and adjust along the axial position at the same time. The end of the moving threaded rod 312 will also adjust the position of the support seat 26 with the cooperation of the second spring 25, that is, the elastic force adjustment of the second spring 25 for elastically supporting the pilot valve core 24 is completed. The pilot valve core 24 can be pushed open according to the pressure requirement to connect the leakage port 13 and the inner cavity of the valve sleeve 23, realizing the rapid adjustment of the pipeline system for oil discharge according to different oil pressures.

[0062] Please refer to Figures 7 - 14 , the high-pressure overflow valve with an oil replenishing function further includes a conduit member 5. The conduit member 5 includes a diversion pipe 51, a solid rod 52, a connecting rod 53 and an axially moving connecting member 54. The diversion pipe 51 and the solid rod 52 are integrally formed. The axially moving connecting member 54 connects the solid rod 52 and the connecting rod 53. Through holes 241 are provided on the threaded rod 312, the pilot valve core 24 and the valve sleeve 23. A jack 318 is provided on the end face of the connecting column 315. One end of the connecting rod 53 away from the axially moving connecting member 54 is inserted into the jack 318 and fixed by a third fixing bolt 55. A threaded hole 214 is provided in the middle hole inside the main valve core 21. An external thread 56 that cooperates with the threaded hole 214 is provided at the end of the diversion pipe 51. Among them, the thread helix directions of the threaded rod 312 and the external thread 56 are set in the opposite direction. First liquid outlet holes 57 and second liquid outlet holes 58 are respectively provided on the outer part of the diversion pipe 51. A first guiding groove 16 is opened on the inner wall of the main valve body 11. A first guiding block 215 that slides and cooperates with the first guiding groove 16 is fixed on the outer wall of the main valve core 21.

[0063] When the pressure of the oil in the pipeline system exceeds the preset value of the pressure between the oil in the pipeline system and the oil in the oil tank, or when the pressure of the oil in the pipeline system is lower than the preset value of the pressure between the oil in the pipeline system and the oil in the oil tank, the circuit system will control the motor 311 in the elastic force adjusting component 3 to drive the connecting column 315 to rotate. The rotating connecting column 315 drives the threaded rod 312 to rotate and move backward through the cooperation of the limiting strip 316 and the limiting strip groove 319. Under the elastic force of the second spring 25, the support 26 will move backward inside the pilot valve body 12 to release the second spring 25, and the second spring 25 will be in a more relaxed state. At this time, the oil in the pipeline system is discharged from the first liquid outlet hole 57 to the inside of the first spring 22 through the diversion pipe 51 and discharged from the second liquid outlet hole 58 to the inside of the valve sleeve 23 at the front end of the pilot valve core 24. Since the second spring 25 is more relaxed, the pilot valve core 24 is more easily squeezed by the oil inside the valve sleeve 23 (i.e., the pipeline system), and the gap between the flange inside the main valve body 11 and the inclined surface 211 outside the main valve core 21 will be more easily scraped and pressed larger, increasing the overflow speed. And while the motor 311 drives the connecting column 315 to drive the threaded rod 312 to rotate to adjust the elastic pressure of the second spring 25 on the pilot valve core 24. The rotating connecting column 315 will also synchronously drive the connecting rod 53, the axially moving connecting part 54, the solid rod 52, and the diversion pipe 51 in the conduit part 5 to rotate. The external thread 56 at the end of the rotating diversion pipe 51 cooperates with the threaded hole 214 inside the main valve core 21, so that the main valve core 21 moves to compress the first spring 22. A larger gap is generated between the flange inside the main valve body 11 and the inclined surface 211 on the outer wall of the main valve core 21, so that whether the oil in the pipeline system overflows into the oil tank through the overflow port 14 or the oil in the oil tank is replenished into the oil pipeline system through the overflow port 14, it can be completed in a short time. When the difference between the oil in the pipeline system and the oil in the oil tank is reduced to within the preset value, the circuit system will control the motor 311 to rotate in the reverse direction, so that the elastic support forces of the second spring 25 and the first spring 22 are reset to the original state.

[0064] The setting of the first guide block 215 and the first guide groove 16 is to improve the stability of the main valve core 21 when moving inside the main valve body 11, that is, when the diversion pipe 51 rotates, the main valve core 21 can move stably.

[0065] Further, the axially moving connecting part 54 includes a sleeve 541 and a second guide block 543. The second guide groove 542 is arranged on the outside of the sleeve 541, and the sleeve 541 and the solid rod 52 can be integrally formed. One end of the sleeve 541 is connected to the end of the solid rod 52 away from the external thread 56, one end of the connecting rod 53 is movably inserted into the inside of the sleeve 541, and a second guide block 543 that slidably cooperates with the second guide groove 542 is arranged on the outside of the end of the connecting rod 53.

[0066] The second guiding block 543 can slide in the second guiding groove 542 inside the sleeve 541. When the main spool valve 21 moves to squeeze the first spring 22, the moving main spool valve 21 will drive the diversion pipe 51, the solid rod 52 and the sleeve 541 to move together. At this time, the second guiding groove 542 outside the sleeve 541 and the second guiding block 543 outside the connecting rod 53 will have relative sliding, that is, to avoid the moving sleeve 541.

[0067] It should be noted that the specific model specifications of the above motor 311, electromagnet 412, mobile power source 413, signal receiving switch module 414 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail. The power supply and its principle of the motor 311, electromagnet 412, mobile power source 413, signal receiving switch module 414, and control system are all publicly available existing technologies, which are clear to those skilled in the art and will not be described in detail here.

[0068] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0069] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high-pressure overflow valve with an oil replenishing function, characterized in that Comprising: An overflow valve housing assembly (1), the overflow valve housing assembly (1) includes a main valve body (11) and a pilot valve body (12), the main valve body (11) is detachably connected to the pilot valve body (12), an overflow port (14) is provided outside the main valve body (11), and a leakage port (13) is provided outside the pilot valve body (12); An overflow valve core assembly (2), the overflow valve core assembly (2) includes a main valve core (21), a valve sleeve (23), a pilot valve core (24) and a support (26), the valve sleeve (23) is fixed at the inner end of the main valve body (11), and an oil outlet hole (231) communicating with the leakage port (13) is provided outside the valve sleeve (23), the main valve core (21) is axially movably arranged inside the main valve body (11) and elastically supported by a first spring (22), an integrally formed inclined surface (211), an arc-shaped ring groove (212) and a ring surface (213) are respectively provided on the outer wall of the main valve core (21), and the support (26) and the pilot valve core (24) are both axially movably arranged inside the pilot valve body (12) and elastically supported by a second spring (25); A spring force adjusting assembly (3), the spring force adjusting assembly (3) is installed at the end of the pilot valve body (12) to axially move and adjust the support (26), the spring force adjusting assembly (3) includes a motor (311), a threaded rod (312), a support sleeve (314) and a connecting column (315), the motor (311) is fixed to the end of the pilot valve body (12) by a second fixing bolt (313), the support sleeve (314) is sleeved outside the screw rod of the second fixing bolt (313) located between the motor (311) and the pilot valve body (12), the threaded rod (312) is screwed and installed at the end of the pilot valve body (12) to support the support (26), a barrel groove (317) is provided inside the threaded rod (312), and a limiting strip groove (319) is provided on the inner wall of the barrel groove (317), one end of the connecting column (315) is connected to the output shaft end of the motor (311), the connecting column (315) is movably inserted into the barrel groove (317) internally, and a limiting strip block (316) matching the limiting strip groove (319) is fixedly provided on the outer wall of the connecting column (315); The conduit member (5) includes a diversion pipe (51), a solid rod (52), a connecting rod (53) and an axially moving connecting member (54). The diversion pipe (51) is integrally formed with the solid rod (52). The axially moving connecting member (54) connects the solid rod (52) and the connecting rod (53). Through holes (241) are provided on the threaded rod (312), the pilot spool (24) and the valve sleeve (23). A jack (318) is provided on the end face of the connecting column (315). One end of the connecting rod (53) away from the axially moving connecting member (54) is inserted into the jack (318) and fixed by a third fixing bolt (55). A threaded hole (214) is provided in the middle hole inside the main spool (21). An external thread (56) matching the threaded hole (214) is provided at the end of the diversion pipe (51). A first liquid outlet hole (57) and a second liquid outlet hole (58) are respectively provided on the outer part of the diversion pipe (51). A first guiding groove (16) is formed on the inner wall of the main valve body (11). A first guiding block (215) slidingly matched with the first guiding groove (16) is fixed on the outer wall of the main spool (21).

2. The high-pressure overflow valve with an oil replenishment function according to claim 1, characterized in that, It further includes a distance auxiliary adjustment component (4). The distance auxiliary adjustment component (4) includes an electromagnetic absorber (41) and a third spring (42). An installation groove (233) is provided on the end face of the valve sleeve (23) close to the first spring (22). A limiting groove (235) is provided on the bottom wall of the installation groove (233). One end of the third spring (42) is inserted into the limiting groove (235), and the other end of the third spring (42) elastically supports the electromagnetic absorber (41) located inside the installation groove (233). One end face of the electromagnetic absorber (41) elastically supports the first spring (22).

3. The high-pressure overflow valve with an oil replenishing function according to claim 2, characterized in that, The electromagnetic absorber (41) includes an annular shell (411), an electromagnet (412), a mobile power source (413), a signal receiving and switching module (414) and a positioning block (415). The electromagnet (412) is arranged at the middle position of the annular structure inside the annular shell (411). The mobile power source (413) is arranged at the outer circumferential wall inside the annular shell (411). The signal receiving and switching module (414) and the positioning block (415) are respectively installed at the position close to the inner circumferential wall inside the annular shell (411).

4. A high-pressure overflow valve with an oil replenishment function according to claim 2, characterized in that A limiting ring plate (232) for limiting the electromagnetic absorber (41) is detachably fixed to one end of the valve sleeve (23) close to the main spool (21) by a first fixing bolt (234).

5. A high-pressure overflow valve with an oil replenishing function according to claim 1, characterized in that, The overflow valve housing assembly (1) further includes a first sealing ring (15). The first sealing ring (15) is arranged between the outer wall of the main valve body (11) and the inner wall of the pilot valve body (12). The overflow spool assembly (2) further includes a second sealing ring (27). The second sealing ring (27) is arranged between the outer wall of the main spool (21) and the inner wall of the main valve body (11).

6. The high-pressure overflow valve with an oil replenishing function according to claim 1, characterized in that The overflow spool assembly (2) further includes a third sealing ring (28). The third sealing ring (28) is arranged between the outer wall of the valve sleeve (23) and the inner wall of the pilot valve body (12).

7. A high-pressure overflow valve with an oil replenishing function according to claim 1, characterized in that, The overflow valve spool assembly (2) further includes a fourth sealing ring (29), and the fourth sealing ring (29) is arranged between the outer wall of the support (26) and the inner wall of the pilot valve body (12).

Images