High-pressure overflow valve with oil supplementing function

Abstract

The invention provides a high-pressure overflow valve with an oil supplementing function, and relates to the technical field of valves. The high-pressure overflow valve with the oil supplementing function comprises an overflow valve shell assembly, an overflow valve element assembly and an elastic force adjusting assembly. An overflow port is arranged outside the main valve body, and a leakage port is arranged on the outer side of the pilot valve body. The valve sleeve is fixed to the tail end in the main valve body, an oil outlet hole communicated with the leakage port is formed in the outer portion of the valve sleeve, an inclined face, an arc-shaped annular groove and an annular face which are integrally formed are arranged on the outer wall of the main valve element, and the support and the pilot valve element are movably arranged in the pilot valve body in the axial direction and elastically supported through a second spring. The oil passing through the overflow port extrudes and moves the main valve element backwards through the arc-shaped ring groove and the ring face on the outer side of the main valve element, the oil in the oil tank flows back into the pipeline system through the overflow port, and the oil overflowing into the oil tank automatically flows back into the pipeline system when the oil pressure in the oil tank is higher than that of the pipeline system.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a high-pressure relief valve with an oil replenishing function. Background Art

[0002] The pilot-operated high-pressure relief valve is mainly composed of a main valve and a pilot valve, and is an opening and closing device for fully opening and fully closing. During operation, the hydraulic pressure acts on the end pressure surfaces of the main valve core and the pilot valve core at the same time. When the pilot valve is not opened, the oil in the valve cavity does not flow, the pressure acting on the internal cavity of the main valve core and the external port is equal, and the valve port is in a closed state. When the oil inlet pressure increases to open the pilot valve, the liquid flows back to the oil tank through the middle hole on the main valve core and the pilot valve. At this time, the oil circulation in the internal cavity of the main valve core causes the pressure to decrease, and there is a pressure difference between the oil and the external port oil. The main valve core moves to achieve overflow and maintain a basically stable pressure. However, the pilot relief valve in the related art cannot realize the function of self-reflow and oil replenishment when the oil pressure inside the oil tank is higher than the oil inside 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. To this end, the present application proposes a high-pressure relief valve with oil replenishment function to solve the problem that the pilot relief valve in the related art cannot realize automatic reflux and oil replenishment when the oil pressure inside the oil tank is higher than the oil inside the pipeline.

[0004] According to an embodiment of the present application, a high-pressure relief valve with an oil replenishment function includes: a relief valve housing assembly, a relief valve core assembly and an elastic force adjustment assembly.

[0005] The overflow valve housing assembly comprises a main valve body and a pilot valve body, the main valve body and the pilot valve body are detachably connected, an overflow port is arranged outside the main valve body, and a leakage port is arranged outside the pilot valve body; The overflow valve core assembly comprises a main valve core, a valve sleeve, a pilot valve core and a support, the valve sleeve is fixed at the rear end of the main valve body, and the valve sleeve is provided with an oil outlet hole connected to the leakage port on the outside, the main valve core is axially movable and arranged inside the main valve body and elastically supported by a first spring, the outer wall of the main valve core is respectively provided with an integrally formed inclined surface, an arc-shaped annular groove and annular surface, the support and the pilot valve core are both axially movable and arranged inside the pilot valve body and elastically supported by a second spring; The elastic force adjustment component is installed on the rear end of the pilot valve body and moves along the axial direction to adjust the support.

[0006] Preferably, the elastic force adjustment assembly comprises a nut and an adjusting screw, the nut is fixed to the rear end of the pilot valve body, and the adjusting screw is threadedly installed with the nut.

[0007] Preferably, the adjusting screw is provided with a pyramid hole matched with a disassembly tool at one end away from the support.

[0008] Preferably, the relief valve housing assembly further includes a first sealing ring, which is disposed between the outer wall of the main valve body and the inner wall of the pilot valve body.

[0009] The high-pressure relief valve with oil replenishment function also includes a distance auxiliary adjustment component, which includes an electromagnetic suction piece and a third spring. The end face of the valve sleeve close to the first spring is provided with a mounting groove, and the bottom wall of the mounting groove is provided with a limiting 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 piece located inside the mounting groove, and one end face of the electromagnetic suction piece elastically supports the first spring.

[0010] Preferably, the electromagnetic suction component includes an annular shell, an electromagnet, a mobile power supply, a signal receiving switch module and a positioning block, the electromagnet is arranged in the middle position of the annular structure inside the annular shell, the mobile power supply is arranged at the outer ring wall inside the annular shell, and the signal receiving switch module and the positioning block are respectively installed inside the annular shell near the inner ring wall.

[0011] Preferably, the valve sleeve is detachably fixed to a limiting ring plate of the limiting electromagnetic suction component at one end close to the main valve core by a first fixing bolt.

[0012] Preferably, the overflow valve core assembly further includes a second sealing ring, and the second sealing ring is arranged between the outer wall of the main valve core and the inner wall of the main valve body.

[0013] Preferably, the overflow valve core assembly further includes a third sealing ring, and the third sealing ring is arranged between the outer wall of the valve sleeve and the inner wall of the pilot valve body.

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

[0015] Preferably, the elastic force adjustment component includes a motor, a threaded rod, a support sleeve and a connecting column, the motor is fixed to the rear end of the pilot valve body by a second fixing bolt, the support sleeve is sleeved on the outside of the screw of the second fixing bolt located between the motor and the pilot valve body, the threaded rod is threadedly installed on the support support at the rear end of the pilot valve body, a barrel groove is provided inside the threaded rod, and a limiting strip groove is provided on the inner wall of the barrel groove, one end of the connecting column is connected to the output shaft end of the motor, the connecting column is movably inserted in the barrel groove, and a limiting strip block matching the limiting strip groove is fixedly provided on the outer wall of the connecting column.

[0016] The high-pressure relief valve with oil replenishment function also includes a conduit member, which includes a guide tube, a solid rod, a connecting rod and an axially movable connecting member. The guide tube and the solid rod are integrally formed, and the axially movable connecting member connects the solid rod and the connecting rod. The threaded rod, the pilot valve core and the valve sleeve are all provided with through holes, and the end surface of the connecting column is provided with a socket. The end of the connecting rod away from the axially movable connecting member is inserted into the socket and fixed by a third fixing bolt. The middle hole inside the main valve core is provided with a threaded hole, and the end of the guide tube is provided with an external thread matching the threaded hole. The outside of the guide tube is respectively provided with a first liquid outlet and a second liquid outlet, and the inner wall of the main valve body is provided with a first guide groove, and the outer wall of the main valve core is fixed with a first guide block that slidably matches the first guide groove.

[0017] Preferably, the axially movable connecting member includes a sleeve and a second guide block, a second guide groove is arranged on the outside 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 in the sleeve, and a second guide block is arranged on the outside of the end of the connecting rod to slide with the second guide groove.

[0018] The beneficial effect of the present application is that the high-pressure relief valve with oil replenishment function obtained by the above design can not only complete the oil in the pilot overflow pipeline system. When the oil pressure in the pipeline system is lower than the oil pressure inside the oil tank, the oil inside the oil tank enters the overflow port. At this time, the oil passing through the overflow port squeezes the main valve core backward through the arc-shaped annular groove and the annular surface on the outside of the main valve core, and a gap is generated between the internal flange of the main valve body and the external inclined surface of the main valve core. The oil inside the oil tank will flow back to the inside of the pipeline system through the overflow port, and the oil overflowing into the oil tank will automatically flow back to the inside of the pipeline system when the oil pressure inside the oil tank is higher than that of the pipeline system.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic structural diagram of a high-pressure relief valve with an oil replenishment function according to an embodiment of the present application; Figure 2 According to the embodiment of the present application Figure 1A partial enlarged structural diagram of part A; Figure 3 is a structural schematic diagram of a high-pressure relief valve with an oil replenishment function according to another embodiment of the present application; Figure 4 It is a structural schematic diagram of a main valve body, a main valve core, a first spring, a valve sleeve, a pilot valve core and a distance auxiliary adjustment assembly according to an embodiment of the present application; Figure 5 is a schematic diagram of the installation structure of the valve sleeve and the distance auxiliary adjustment assembly according to an embodiment of the present application; Figure 6 is a schematic diagram of the structure of an electromagnetic suction component according to an embodiment of the present application; Figure 7 is a schematic structural diagram of an elastic force adjustment component according to another embodiment of the present application; Figure 8 is a schematic diagram of the structure of a catheter according to an embodiment of the present application; Fig. 9 is a schematic structural diagram of a connecting rod and a second guide block according to an embodiment of the present application; Fig.10 is a schematic diagram of the sleeve and solid rod structure according to an embodiment of the present application; Fig.11 According to the embodiment of the present application Figure 8 The schematic diagram of the partial enlarged structure of part B in the middle; Fig.12 According to the embodiment of the present application Figure 8 The schematic diagram of the partially enlarged structure of part C in the middle; Fig.13 According to the embodiment of the present application Figure 8 The schematic diagram of the partially enlarged structure of part D in the middle; Fig.14 It is a schematic diagram of the cross-sectional structure of the guide tube and the solid rod connecting section according to an embodiment of the present application.

[0022] Reference numerals: 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- arcuate 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- elastic force adjustment assembly; 301- nut; 302- Adjusting screw; 311-motor; 312-threaded rod; 313-second fixing bolt; 314-support sleeve; 315-connecting column; 316-limiting bar block; 317-cylinder groove; 318-jack; 319-limiting bar groove; 4-distance auxiliary adjustment component; 41-electromagnetic suction piece; 411-ring shell; 412-electromagnet; 413-mobile power supply; 414-signal receiving switch module; 415-positioning block; 42-third spring; 5-conduit piece; 51-flow guide tube; 52-solid rod; 53-connecting rod; 54-axial movable connecting piece; 541-sleeve; 542-second guide groove; 543-second guide block; 55-third fixing bolt; 56-external thread; 57-first liquid outlet; 58-second liquid outlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0024] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] A high-pressure relief valve with an oil replenishment function according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0027] See also Figure 1-Figure 2 According to an embodiment of the present application, a high-pressure relief valve with an oil replenishing function includes: a relief valve housing assembly 1, a relief valve core assembly 2 and an elastic force adjustment assembly 3.

[0028] Among them, through the arrangement of the overflow valve housing assembly 1, the overflow valve core assembly 2 and the elastic force adjustment assembly 3, the high-pressure overflow valve can not only realize the pilot overflow to the inside of the oil 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 oil tank, the oil inside the oil tank can flow back by itself and replenish the pipeline system from the port.

[0029] 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 screw connection. An overflow port 14 is arranged outside the main valve body 11, and a leakage port 13 is arranged outside the pilot valve body 12. 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 to the rear end of the main valve body 11, and an oil outlet hole 231 connected to the leakage port 13 is arranged outside the valve sleeve 23. The main valve core 21 is axially movable and arranged inside the main valve body 11 and is elastically supported by the first spring 22. The outer wall of the main valve core 21 is respectively provided with an integrally formed inclined surface 211, an arcuate annular groove 212 and an annular surface 213. The inclined surface 211 outside the main valve core 21 abuts against the inner wall flange of the main valve body 11 to block the port and overflow port 14 at the end of the main valve body 11. The support 26 and the pilot valve core 24 are both axially movable and arranged inside the pilot valve body 12 and are elastically supported by the second spring 25. The elastic force adjustment component 3 is installed on the rear end of the pilot valve body 12 and moves along the axial direction to adjust the support 26 .

[0030] 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 valve core 21 through the middle hole inside the main valve core 21, and the oil inside the main valve core 21 enters the cavity inside the valve sleeve 23 at the front end of the pilot valve core 24 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 valve core 21 and the oil pressure in the cavity inside the valve sleeve 23 are 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 valve core 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 valve core 24, and the second spring 25 at the rear of the pilot valve core 24 is compressed by the pressure until the pilot valve core 24 retreats to the valve sleeve 23, and the oil inside the valve sleeve 23 passes through the oil outlet hole 231 on one side of the valve sleeve 23 and finally flows into the oil tank through the leakage port 13. At this time, the oil circulation pressure inside the main valve core 21 drops, and the oil pressure in the pipeline system is higher than the oil pressure inside the main valve core 21. The oil inside the pipeline system squeezes the main valve core 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 valve core 21. The over-pressure oil in the pipeline system eventually flows quickly into the oil tank through the overflow port 14 outside the main valve body 11, completing the high-pressure overflow operation of the pipeline system.

[0031] The oil replenishment principle of the high-pressure relief valve with oil replenishment function is as follows: when the oil pressure in the pipeline system is lower than the oil pressure inside the oil tank, the oil inside the oil tank enters the overflow port 14 and the arcuate annular groove 212 outside the main valve core 21. At this time, the inside of the oil tank squeezes the arcuate annular groove 212 outside the main valve core 21 and the annular surface 213 on one side through the overflow port 14. Among them, the arcuate area of ​​the arcuate annular groove 212 near the rear end of the main valve core 21 is larger than the arcuate area near the front end of the main valve core 21, and the annular surface 213 is located at the rear side of the arcuate annular groove 212 and is integrally formed with the arcuate annular 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 annular groove 212 and the annular surface 213 on the outside of the main valve core 21, causing the first spring 22 in the internal cavity of the main valve core 21 to be compressed, and a gap is generated between the internal flange of the main valve body 11 and the external inclined surface 211 of the main valve core 21. The oil inside the oil tank will flow back to the inside of the pipeline system through the overflow port 14. The oil that has overflowed into the oil tank will automatically flow back to the inside of the pipeline system when the oil pressure inside the oil tank is higher than that of the pipeline system.

[0032] In the specific setting, the elastic force adjustment component 3 includes a nut 301 and an adjustment screw 302. The nut 301 is fixed to the rear end of the pilot valve body 12, and the adjustment screw 302 is threadedly installed with the nut 301. By turning the adjustment screw 302 in the elastic force adjustment component 3, the pressure of the second spring 25 on the pilot valve core 24 can be adjusted according to demand under the threaded cooperation of the adjustment screw 302 and the nut 301, that is, it is used to adjust the oil pressure in the pipeline system to push the pilot valve core 24 to move near the specified pressure range, so as to complete the release of the oil in the pipeline system from the overflow port 14 to the inside of the oil tank.

[0033] Furthermore, a pyramidal hole cooperating with a disassembly tool is provided at one end of the adjusting screw 302 away from the support 26. The pyramidal hole can be a conventional regular hexagonal hole. After inserting an appropriate tool into the pyramidal hole, the adjusting screw 302 is rotated to adjust the elasticity of the second spring 25 supporting the pilot valve core 24, that is, to adjust the oil overflow pressure range.

[0034] When the oil pressure inside the oil tank of the high-pressure relief valve with oil replenishment function is higher than the oil pressure in the pipeline system, the oil inside the oil tank flows back into the pipeline system through the overflow port 14. The oil pressure inside the oil tank gradually decreases, and under the elastic support of the first spring 22, the gap between the internal flange of the main valve body 11 and the external inclined surface 211 of the main valve core 21 gradually decreases. The flow rate of oil flowing back from the overflow port 14 also gradually decreases, and the oil return replenishment gradually slows down.

[0035] See also Figure 3 , Figure 4 and Figure 5 The high-pressure relief valve with oil replenishment function also includes a distance auxiliary adjustment component 4, which includes an electromagnetic suction component 41 and a third spring 42. The end surface of the valve sleeve 23 close to the first spring 22 is provided with a mounting groove 233, and the bottom wall of the mounting groove 233 is provided with a limiting groove 235. 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 suction component 41 located in the mounting groove 233, and one end surface of the electromagnetic suction component 41 elastically supports the first spring 22.

[0036] A first pressure monitoring sensor is pre-set in the system pipeline of the overflow valve, and a second pressure monitoring sensor is set in the oil tank. When the oil pressure difference in the pipeline system and the oil pressure in the oil tank is between the preset oil difference. The electromagnetic suction component 41 is in an unpowered state, and the main valve core 21 is stably supported by the elasticity of the third spring 42, the electromagnetic suction component 41, and the first spring 22, so that the inclined surface 211 on the outside of the main valve core 21 fits with the flange on the inside of the main valve body 11 in a closed state. When the oil pressure in the pipeline system is less than the oil pressure difference in the oil tank by more than the preset difference, the system controls the electromagnetic suction component 41 to be energized, and both end faces of the electromagnetic suction component 41 will have magnetic force. That is, one end face of the electromagnetic suction component 41 will magnetically absorb 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 component 41 will magnetically absorb the first spring 22. When the electromagnetic suction component 41 magnetically absorbs 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 oil inside the oil tank is more likely to pressurize the main valve core 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 outer inclined surface 211 of the main valve core 21, and the oil inside the oil tank is more likely to quickly flow back through the overflow port 14 to replenish the inside of the pipeline system.

[0037] See also Figure 6 If the above-mentioned electromagnetic suction component 41 adopts a conventional electromagnetic component structure for passing a wire, the wire will pass through the valve sleeve 23 and the pilot valve body 12, which will cause great difficulties in the valve perforation and sealing processing. Therefore, the present application also provides an embodiment, in which the electromagnetic suction component 41 includes an annular shell 411, an electromagnet 412, a mobile power supply 413, a signal receiving switch module 414 and a positioning block 415. The electromagnet 412 is arranged in the middle position of the annular structure inside the annular shell 411, and the mobile power supply 413 is arranged on the outer ring wall inside the annular shell 411. The signal receiving switch module 414 and the positioning block 415 are respectively installed inside the annular shell 411 near the inner ring wall.

[0038] When the oil pressure in the system pipeline monitored in the system is less than the difference of the oil in the oil tank by more than the preset value, the control system will remotely control the signal receiving switch module 414 to turn on the electromagnet 412 by wireless means, and the mobile power supply 413 inside the annular shell 411 can provide power to the electromagnet 412 to complete the adsorption of the third spring 42 and the first spring 22. That is, the remote control adjustment of the pressure of the third spring 42 and the first spring 22 on the main valve core 21 is completed, and there is no need to use wires to connect the electromagnet 412, so that the valve structure as a whole has better sealing performance, and there is no need to install wires, which makes the disassembly and assembly between components more convenient and quick. The annular shell 411 can be sealed and detachable, and the electromagnetic suction component 41 can be quickly replaced as a whole later. The replaced electromagnetic suction component 41 can be returned to the factory to replace the internal mobile power supply 413, and can continue to be used later.

[0039] Furthermore, the valve sleeve 23 is detachably fixed with a limiting ring plate 232 of the limiting electromagnetic suction member 41 by a first fixing bolt 234 at one end thereof close to the main valve core 21. The limiting ring plate 232 can be used to limit the electromagnetic suction member 41 to be movably installed inside the mounting groove 233. 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.

[0040] For details, please refer to Figure 1 , the overflow valve housing assembly 1 also includes a first sealing ring 15, which is arranged between the outer wall of the main valve body 11 and the inner wall of the pilot valve body 12. The overflow valve core assembly 2 also includes a second sealing ring 27, which is arranged between the outer wall of the main valve core 21 and the inner wall of the main valve body 11. The overflow valve core assembly 2 also includes a third sealing ring 28, which is arranged between the outer wall of the valve sleeve 23 and the inner wall of the pilot valve body 12. The overflow valve core assembly 2 also includes a fourth sealing ring 29, which is arranged between the outer wall of the support 26 and the inner wall of the pilot valve body 12. The first sealing ring 15, the second sealing ring 27, the third sealing ring 28, and the fourth sealing ring 29 are arranged to improve the sealing effect of the overall 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 arranged between the internal structures of the valve body for installing the corresponding sealing rings.

[0041] In the above-mentioned high-pressure relief valve with oil replenishment function, through the cooperation between the distance auxiliary adjustment component 4 and the valve component, when the oil inside the oil tank flows back through the overflow port 14, there is a larger gap between the internal flange of the main valve body 11 and the external inclined surface 211 of the main valve core 21, thereby improving the reflux oil replenishment speed. However, as the difference between the oil pressure inside the oil tank and the oil pressure in the pipeline system decreases, the gap between the internal flange of the main valve body 11 and the external inclined surface 211 of the main valve core 21 will still decrease to a certain extent, thus affecting the oil reflux replenishment speed.

[0042] This application also provides an implementation method, see Figure 3 and Figure 7The elastic force adjustment 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 rear end of the pilot valve body 12 by a second fixing bolt 313, and the support sleeve 314 is sleeved on the outside of the screw 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 supporting support 26 at the rear end of the pilot valve body 12, and 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, and the connecting column 315 is movably inserted inside the barrel groove 317, 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 connecting column 315 and the limiting strip block 316 can be integrally formed.

[0043] In this embodiment of the application, the main body of the elastic force adjustment component 3 is composed of a motor 311 , a threaded rod 312 , a connecting column 315 and a limiting bar 316 .

[0044] When it is necessary to adjust the elastic force of the second spring 25 supporting the pilot valve core 24, the circuit system controls the motor 311 in the elastic force adjustment component 3 to drive the connecting column 315 to rotate, and the rotating connecting column 315 will also drive the threaded rod 312 to rotate through the cooperation between the limiting bar block 316 and the limiting bar groove 319. The rotating threaded rod 312 will also move and adjust along the axial position, and the end of the moving threaded rod 312 will also adjust the position of the support 26 with the cooperation of the second spring 25, that is, the elastic force adjustment of the second spring 25 elastically supporting the pilot valve core 24 is completed, and the pilot valve core 24 can be pushed to open the connection between the leakage port 13 and the internal cavity of the valve sleeve 23 according to the pressure demand, so as to realize the rapid adjustment of the pipeline system according to different oil pressures.

[0045] See also Figure 7-Figure 14 The high-pressure relief valve with oil replenishment function also includes a conduit 5, which includes a guide tube 51, a solid rod 52, a connecting rod 53 and an axially movable connecting member 54. The guide tube 51 and the solid rod 52 are integrally formed, and the axially movable connecting member 54 connects the solid rod 52 and the connecting rod 53. The threaded rod 312, the pilot valve core 24, and the valve sleeve 23 are all provided with a through hole 241. The end surface of the connecting column 315 is provided with a plug hole 318. The end of the connecting rod 53 away from the axially movable connecting member 54 is inserted into the plug hole 318 and fixed by a third fixing bolt 55. The middle hole inside the main valve core 21 is provided with a threaded hole 214, and the end of the guide tube 51 is provided with an external thread 56 that matches the threaded hole 214. Among them, the threaded direction of the threaded rod 312 and the external thread 56 are opposite. A first liquid outlet 57 and a second liquid outlet 58 are respectively disposed outside the flow guide pipe 51 , a first guide groove 16 is formed on the inner wall of the main valve body 11 , and a first guide block 215 slidably matched with the first guide groove 16 is fixed to the outer wall of the main valve core 21 .

[0046] When the pressure of the oil in the pipeline system exceeds the preset pressure value between the oil in the oil tank, or when the pressure of the oil in the pipeline system is lower than the preset pressure value between the oil in the oil tank, the circuit system will control the motor 311 in the elastic force adjustment 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 bar block 316 and the limiting bar 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 is in a more relaxed state. At this time, the oil in the pipeline system is discharged from the first liquid outlet 57 to the inside of the first spring 22 through the guide pipe 51, and is discharged from the second liquid outlet 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 internal flange of the main valve body 11 and the external inclined surface 211 of the main valve core 21 will be easily compressed to increase the overflow speed. And while the motor 311 drives the connecting column 315 to drive the threaded rod 312 to rotate and 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 movable connecting member 54, the solid rod 52, and the guide tube 51 in the conduit member 5 to rotate. The external thread 56 at the end of the rotating guide tube 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 formed between the inner flange of the main valve body 11 and the inclined surface 211 of the outer wall of the main valve core 21, so that whether the pipeline system overflows oil into the oil tank through the overflow port 14, or the oil in the oil tank is replenished into the oil system through the overflow port 14, it can be completed in a relatively short time. When the difference between the oil in the pipeline system and the oil tank is reduced to within a preset value, the circuit system will control the motor 311 to rotate in the opposite direction, so that the elastic supporting force of the second spring 25 and the first spring 22 is reset to the original state.

[0047] The first guide block 215 and the first guide groove 16 are provided to improve the stability of the main valve core 21 when it moves inside the main valve body 11 , that is, when the guide tube 51 rotates, the main valve core 21 can move stably.

[0048] Furthermore, the axially movable connecting member 54 includes a sleeve 541 and a second guide block 543. A second guide groove 542 is provided 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 in the sleeve 541, and a second guide block 543 that slidably cooperates with the second guide groove 542 is provided on the outside of the end of the connecting rod 53.

[0049] The second guide block 543 can slide in the second guide groove 542 inside the sleeve 541. When the main valve core 21 moves to squeeze the first spring 22, the moving main valve core 21 will drive the guide tube 51, the solid rod 52 and the sleeve 541 to move together. At this time, the second guide groove 542 outside the sleeve 541 and the second guide block 543 outside the connecting rod 53 slide relative to each other, that is, to avoid the moving sleeve 541.

[0050] It should be noted that the specific model specifications of the motor 311, electromagnet 412, mobile power supply 413, and signal receiving switch module 414 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail. The power supply and principle of the motor 311, electromagnet 412, mobile power supply 413, signal receiving switch module 414, and control system are all public existing technologies, which are clear to those skilled in the art and will not be described in detail here.

[0051] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high-pressure relief valve with oil replenishment function, characterized in that: include: A relief valve housing assembly (1), the relief valve housing assembly (1) comprising a main valve body (11) and a pilot valve body (12), the main valve body (11) and the pilot valve body (12) being detachably connected, an overflow port (14) being arranged outside the main valve body (11), and a leakage port (13) being arranged outside the pilot valve body (12); An overflow valve core assembly (2), the overflow valve core assembly (2) comprising a main valve core (21), a valve sleeve (23), a pilot valve core (24) and a support (26), the valve sleeve (23) being fixed to the rear end of the main valve body (11), and the valve sleeve (23) being provided with an oil outlet hole (231) communicating with the leakage port (13) on the outside, the main valve core (21) being axially movable and arranged inside the main valve body (11) and being elastically supported by a first spring (22), the outer wall of the main valve core (21) being provided with an integrally formed inclined surface (211), an arcuate annular groove (212) and an annular surface (213), the support (26) and the pilot valve core (24) being axially movable and arranged inside the pilot valve body (12) and being elastically supported by a second spring (25); An elastic force adjustment component (3), wherein the elastic force adjustment component (3) is mounted on an axially movable adjustment support (26) at the rear end of the pilot valve body (12).

2. A high pressure relief valve with oil replenishment function according to claim 1, characterized in that: The elastic force adjustment component (3) comprises a nut (301) and an adjustment screw (302); the nut (301) is fixed to the rear end of the pilot valve body (12); the adjustment screw (302) and the nut (301) are threadedly mounted; and the end of the adjustment screw (302) away from the support (26) is provided with a pyramid hole that cooperates with a disassembly tool.

3. A high pressure relief valve with oil replenishment function according to claim 1, characterized in that: The elastic force adjustment assembly (3) comprises a motor (311), a threaded rod (312), a support sleeve (314) and a connecting column (315); the motor (311) is fixed to the rear end of the pilot valve body (12) via a second fixing bolt (313); the support sleeve (314) is sleeved on the outside of the screw of the second fixing bolt (313) located between the motor (311) and the pilot valve body (12); the threaded rod (312) is threadedly mounted on the pilot valve body (12) a rear end support bracket (26), wherein a barrel groove (317) is provided inside the threaded rod (312), and a limit 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 inside the barrel groove (317), and a limit strip block (316) matching the limit strip groove (319) is fixedly provided on the outer wall of the connecting column (315).

4. A high pressure relief valve with oil replenishment function according to claim 3, characterized in that: The invention also comprises a conduit member (5), the conduit member (5) comprising a flow guide tube (51), a solid rod (52), a connecting rod (53) and an axially movable connecting member (54), the flow guide tube (51) and the solid rod (52) being integrally formed, the axially movable connecting member (54) connecting the solid rod (52) and the connecting rod (53), the threaded rod (312), the pilot valve core (24) and the valve sleeve (23) being all provided with a through hole (241), the end surface of the connecting column (315) being provided with a plug hole (318), the connecting rod (53) being away from the axially movable connecting member ( One end of the main valve body (54) is inserted into the insertion hole (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) matching with the threaded hole (214) is provided at the end of the guide tube (51), a first liquid outlet hole (57) and a second liquid outlet hole (58) are respectively provided on the outside of the guide tube (51), a first guide groove (16) is provided on the inner wall of the main valve body (11), and a first guide block (215) slidably matched with the first guide groove (16) is fixed on the outer wall of the main valve core (21).

5. A high pressure relief valve with oil replenishment function according to claim 1, characterized in that: The valve sleeve (23) further comprises a distance auxiliary adjustment component (4), the distance auxiliary adjustment component (4) comprising an electromagnetic suction component (41) and a third spring (42), the end surface of the valve sleeve (23) close to the first spring (22) is provided with a mounting groove (233), the bottom wall of the mounting groove (233) is provided with a limiting groove (235), 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 suction component (41) located in the mounting groove (233), and one end surface of the electromagnetic suction component (41) elastically supports the first spring (22).

6. A high pressure relief valve with oil replenishment function according to claim 5, characterized in that: The electromagnetic suction component (41) comprises an annular 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 in the middle position of the annular structure inside the annular shell (411); the mobile power source (413) is arranged at the outer ring wall inside the annular shell (411); and the signal receiving switch module (414) and the positioning block (415) are respectively installed inside the annular shell (411) near the inner ring wall.

7. A high pressure relief valve with oil replenishment function according to claim 5, characterized in that: The valve sleeve (23) has an end close to the main valve core (21) which is detachably fixed to a limiting ring plate (232) of a limiting electromagnetic suction member (41) via a first fixing bolt (234).

8. The high-pressure relief valve with oil replenishment function according to claim 1, characterized in that: The overflow valve housing assembly (1) further comprises a first sealing ring (15), the first sealing ring (15) being arranged between the outer wall of the main valve body (11) and the inner wall of the pilot valve body (12), and the overflow valve core assembly (2) further comprises a second sealing ring (27), the second sealing ring (27) being arranged between the outer wall of the main valve core (21) and the inner wall of the main valve body (11).

9. The high-pressure relief valve with oil replenishment function according to claim 1, characterized in that: The overflow valve core assembly (2) further comprises a third sealing ring (28), wherein 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).

10. The high-pressure relief valve with oil replenishment function according to claim 1, characterized in that: The overflow valve core assembly (2) further comprises a fourth sealing ring (29), wherein 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).

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