Pressure stabilizing type overflow valve convenient to adjust

Abstract

The invention relates to the technical field of overflow valves, and discloses a pressure stabilizing type overflow valve convenient to adjust, which comprises a valve body, a first liquid inlet cavity is formed in the side surface of the valve body, a first liquid storage cavity is formed in the bottom side of the valve body, the first liquid storage cavity is communicated with the first liquid inlet cavity, and a second liquid storage cavity is formed in the valve body corresponding to the upper part of the first liquid storage cavity. The second liquid storage cavity is communicated with the first liquid storage cavity, and a second liquid inlet cavity is formed in the position, corresponding to the upper portion of the first liquid inlet cavity, of the side face of the valve body. According to the multi-stage pressure relief device, when the internal oil pressure is increased again, the second pressure relief structure and the third pressure relief structure move again, pressure relief is directly conducted through the second pressure relief structure and the third pressure relief structure, multi-stage pressure relief operation is achieved for flow division, so that the oil pressure at the oil outlet and the oil inlet cavity is reduced, equipment connected with the oil outlet is protected, and the service life of the device is prolonged. And normal operation of equipment connected with the oil outlet is prevented from being influenced.

Description

Technical Field

[0001] The invention relates to the technical field of overflow valves, and in particular to a pressure-stabilizing overflow valve which is easy to adjust. Background Art

[0002] The overflow valve plays a role of safety protection in the hydraulic system. When the system pressure exceeds the specified value, the overflow valve opens to discharge part of the liquid in the system so that the system pressure does not exceed the allowable value, thereby ensuring that the system does not cause an accident due to excessive pressure. If the oil pressure in the oil outlet continues to increase, and since the oil outlet and the diverter port are connected, the oil pressure in the diverter port will also increase accordingly. The oil pressure in the passage is relatively large. If the oil pressure in the passage cannot be relieved again, the normal operation of the equipment connected to the oil outlet of the overflow valve will still be affected by the excessive oil pressure. When the pilot valve in the pilot-operated overflow valve leaks, when the internal oil pressure rises again, the pilot valve cannot be opened, making the overflow valve unable to work normally, resulting in the oil pressure being unable to be discharged, causing damage to the valve body. With the use of the overflow valve, a mixture of oil and dust will be produced inside the valve body and adhere to the inner wall of the valve body. At this time, the valve body needs to be disassembled and cleaned, which is time-consuming and inefficient. For this reason, we propose a pressure-stabilizing overflow valve that is easy to adjust. Summary of the invention

[0003] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a pressure-stabilizing overflow valve which is easy to adjust.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an easily adjustable pressure-stabilizing overflow valve, comprising a valve body, a first liquid inlet cavity is provided on the side of the valve body, a first liquid storage cavity is provided on the bottom side of the valve body, the first liquid storage cavity is connected to the first liquid inlet cavity, a second liquid storage cavity is provided in the interior of the valve body corresponding to the upper side of the first liquid storage cavity, the second liquid storage cavity is connected to the first liquid storage cavity, a second liquid inlet cavity is provided in the side of the valve body corresponding to the upper side of the first liquid inlet cavity, the interior of the second liquid inlet cavity is respectively connected to the interiors of the first liquid inlet cavity and the second liquid storage cavity, a third liquid inlet cavity connected to the second liquid inlet cavity is provided in the interior of the valve body corresponding to the position of the second liquid inlet cavity, a fourth liquid inlet cavity connected to the third liquid inlet cavity is provided on the side of the valve body away from the second liquid inlet cavity corresponding to the position of the third liquid inlet cavity, an overflow cavity connected to the first liquid storage cavity is provided on the side of the valve body away from the first liquid inlet cavity, a first guide hole is provided in the interior of the valve body, and both ends of the first guide hole are respectively connected to the fourth liquid inlet cavity and the fourth liquid storage cavity. The cavity and the overflow cavity are communicated with each other, a first movable cavity communicated with the first guide hole is opened on the side of the valve body corresponding to the position of the first guide hole, a second guide hole is opened inside the valve body corresponding to the position of the first movable cavity, two ends of the second guide hole are respectively communicated with the second liquid storage cavity and the first guide hole, a first pressure relief pipe is fixedly connected to the outside of the valve body, a first pressure relief hole is opened on the side of the third liquid inlet cavity, the first pressure relief hole and the first pressure relief pipe are communicated with each other, a drainage cavity is opened on the side of the second liquid storage cavity, a fourth pressure relief hole is opened on the side of the drainage cavity, the fourth pressure relief hole is communicated with the first pressure relief pipe, a second pressure relief hole and a third pressure relief hole extending to the outside of the valve body are respectively opened on the side of the fourth liquid inlet cavity and the side of the overflow cavity, a first pressure relief structure is arranged inside the second liquid storage cavity, a second pressure relief structure is arranged inside the second liquid inlet cavity, the third liquid inlet cavity and the fourth liquid inlet cavity, a third pressure relief structure is arranged inside the overflow cavity, and a fourth pressure relief structure is arranged inside the first movable cavity.

[0005] Preferably, a third guide hole is provided on the side of the first liquid inlet cavity, a first overflow hole is provided on the end of the third guide hole away from the first liquid inlet cavity, the first liquid inlet cavity and the second liquid inlet cavity are interconnected through the third guide hole and the first overflow hole, a second overflow hole is provided on the end of the first liquid inlet cavity corresponding to the first liquid storage cavity, the first liquid inlet cavity and the first liquid storage cavity are interconnected through the second overflow hole, a third overflow hole is provided on the side of the second liquid inlet cavity, the second liquid inlet cavity and the second liquid storage cavity are interconnected through the third overflow hole, a first plug is movably installed at the open end of the second liquid inlet cavity, a third plug is movably installed at the open end of the fourth liquid inlet cavity, a fourth plug is movably installed at the open end of the overflow cavity, and a second plug is movably installed at the open end of the first liquid storage cavity.

[0006] Preferably, the first pressure relief structure includes a mounting tube fixedly mounted inside the second liquid storage chamber, a first adapting cavity is provided on the side of the mounting tube corresponding to the position of the fourth pressure relief hole, a movable barrel is movably mounted inside the mounting tube, a first spring is fixedly connected to the upper end of the movable barrel, an upper end of the first spring is fixedly connected to the top side of the second liquid storage chamber, the movable barrel is a circular barrel with an opening at the lower end, and a second adapting cavity adapted to the first adapting cavity is provided on the side of the movable barrel.

[0007] Preferably, the second pressure relief structure includes a first externally threaded ring threadedly connected to the inside of the fourth liquid inlet chamber, a first movable ring is movably installed at one end of the first externally threaded ring, a second spring is fixedly connected to an end of the first movable ring away from the first externally threaded ring, a first blocking block is fixedly connected to an end of the second spring away from the first movable ring, a first connecting rod is fixedly connected to an end of the first blocking block away from the second spring, and a second blocking block is fixedly connected to an end of the first connecting rod away from the first blocking block, the diameter of the fourth liquid inlet chamber is greater than the diameter of the second liquid inlet chamber, and an oil limit block is fixedly connected to the position of the second blocking block inside the second liquid inlet chamber.

[0008] Preferably, a second movable cavity is opened at one end of the first movable ring corresponding to the first externally threaded ring, a second movable ring is fixedly installed at one end of the first externally threaded ring corresponding to the first movable ring, and the second movable ring is movably installed inside the second movable cavity.

[0009] Preferably, the third pressure relief structure includes a second external threaded ring threadedly connected inside the overflow chamber, a third movable ring is movably installed on one end of the second external threaded ring, a third spring is fixedly connected to one end of the third movable ring away from the second external threaded ring, and a third block is fixedly connected to one end of the third spring away from the second external threaded ring.

[0010] Preferably, a third movable cavity is formed at one end of the third movable ring corresponding to the second externally threaded ring, a fourth movable ring is fixedly mounted at one end of the second externally threaded ring corresponding to the third movable ring, and the fourth movable ring is movably mounted inside the third movable cavity.

[0011] Preferably, the fourth pressure relief structure includes a second pressure relief pipe movably installed inside the first movable chamber, one end of the second pressure relief pipe is fixedly connected with a movable tube, the movable tube extends to the inside of the second guide hole, the second pressure relief pipe and the interior of the movable tube are connected to each other, a liquid inlet hole is provided in the movable tube at a position corresponding to the first guide hole, a fifth liquid inlet chamber is provided on the side of the movable tube at a position corresponding to the second guide hole, a discharge hole is provided at one end of the second pressure relief pipe, a fifth plug is movably installed inside the discharge hole, a mounting block is installed on the side of the valve body at a position corresponding to the second pressure relief pipe, an internal threaded ring is fixedly installed on the side of the mounting block at a position corresponding to the outside of the second pressure relief pipe, a threaded groove is provided on the outside of the second pressure relief pipe at a position corresponding to the internal threaded ring, the second pressure relief pipe is threadedly connected to the inside of the internal threaded ring, and a locking threaded ring is threadedly connected to the outside of the second pressure relief pipe.

[0012] Preferably, a first movable rod is fixedly connected to the end face of the first blocking block, and the first movable rod extends to the outside of the valve body; a second movable rod is fixedly connected to the end face of the third blocking block, and the second movable rod extends to the outside of the valve body; a limiting cavity is provided on the side of the first movable rod, and a third movable rod is fixedly installed on the side of the second movable rod corresponding to the position of the limiting cavity, and the third movable rod extends to the inside of the limiting cavity.

[0013] Preferably, a fourth movable cavity is formed on the end surface of the movable barrel, a threaded rod is movably installed inside the fourth movable cavity, a pressure block is fixedly installed on the upper end of the threaded rod, and the threaded rod is threadedly connected to the second plug. Beneficial Effects

[0014] The present invention provides a pressure-stabilizing overflow valve that is easy to adjust. It has the following beneficial effects: (1) The pressure-stabilizing relief valve, which is easy to adjust, realizes the pressure relief function of the pilot relief valve through the cooperation between the first pressure relief structure and the second pressure relief structure. When the internal pressure gradually increases, the hydraulic oil is guided to the inside of the fourth pressure relief structure through the cooperation between the first pressure relief structure, the second pressure relief structure, the third pressure relief structure and the fourth pressure relief structure, and the pressure relief function is performed through the fourth pressure relief structure. When the internal oil pressure increases again, the second pressure relief structure and the third pressure relief structure move again, and the pressure is directly relieved through the second pressure relief structure and the third pressure relief structure, so as to achieve multi-stage pressure relief operation for diversion, so as to reduce the oil pressure at the oil outlet and the oil inlet chamber, protect the equipment connected to the oil outlet, and avoid affecting the normal operation of the equipment connected to the oil outlet.

[0015] (2) In the adjustable pressure-stabilizing relief valve, when the internal pressure begins to gradually increase, the second blocking block will move a certain distance inside the second liquid inlet chamber, and the normal operation of the second pressure relief valve and the third pressure relief valve can be judged by comparing the movement trajectories of the first moving rod and the second moving rod. When the second pressure relief valve leaks and cannot release pressure normally, the third pressure relief valve can drive the first moving rod of the second pressure relief valve to move through the second moving rod and the third moving rod, so as to open the second pressure relief valve for normal pressure relief and perform emergency pressure relief, thereby avoiding damage to the valve body due to excessive internal pressure.

[0016] (3) The pressure-stabilizing relief valve, which is easy to adjust, separates the movable barrel and the mounting barrel by moving the threaded rod downward, and moves the first movable rod and the second movable rod by moving the second pressure relief pipe, so that the first pressure relief valve, the second pressure relief valve, the third pressure relief valve and the fourth pressure relief valve are in an open state, and kerosene is introduced from the position of the first liquid inlet chamber to dissolve the oil stains adhering to the inner wall of the chamber, and then the kerosene is discharged through the first pressure relief pipe, the second pressure relief hole, the third pressure relief hole and the discharge hole, so that the interior is cleaned without disassembling the valve body, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the implementation or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 For the present invention Figure 2 The enlarged structural diagram at B in the middle; Figure 5 For the present invention Figure 2 The enlarged structural diagram at C in the middle; Figure 6 For the present invention Figure 2 Enlarged structural diagram at D in the middle.

[0020] Legend: 1. Valve body; 211. First liquid inlet cavity; 212. First liquid storage cavity; 213. Second liquid storage cavity; 214. Second liquid inlet cavity; 215. Third liquid inlet cavity; 216. Fourth liquid inlet cavity; 217. Overflow cavity; 218. First guide hole; 219. First movable cavity; 2110. Second guide hole; 221. Third guide hole; 222. First overflow hole; 223. Second overflow hole; 224. Third overflow hole ; 225, first pressure relief hole; 226, first pressure relief pipe; 227, second pressure relief hole; 228, third pressure relief hole; 231, first plug; 232, second plug; 233, third plug; 234, fourth plug; 311, installation cylinder; 312, drainage cavity; 313, first adapter cavity; 314, first spring; 315, moving barrel; 316, second adapter cavity; 317, fourth pressure relief hole; 41 1. First external threaded ring; 412. First movable ring; 413. Second spring; 414. First blocking block; 415. First connecting rod; 416. Second blocking block; 417. Limiting block; 418. First movable rod; 421. Second movable cavity; 422. Second movable ring; 511. Second external threaded ring; 512. Third movable ring; 513. Third spring; 514. Third blocking block; 515. Second movable rod; 521, third movable cavity; 522, fourth movable ring; 611, limit cavity; 612, third movable rod; 711, threaded rod; 712, pressure block; 713, fourth movable cavity; 721, second pressure relief pipe; 722, movable pipe; 723, liquid inlet hole; 724, fifth liquid inlet cavity; 725, discharge hole; 726, fifth plug; 731, mounting block; 732, internal threaded ring; 733, locking threaded ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 6As shown, a pressure-stabilizing overflow valve that is easy to adjust includes a valve body 1, a first liquid inlet cavity 211 is opened on the side of the valve body 1, a first liquid storage cavity 212 is opened on the bottom of the valve body 1, the first liquid storage cavity 212 is interconnected with the first liquid inlet cavity 211, a second liquid storage cavity 213 is opened in the interior of the valve body 1 corresponding to the upper part of the first liquid storage cavity 212, the second liquid storage cavity 213 is interconnected with the first liquid storage cavity 212, a second liquid inlet cavity 214 is opened on the side of the valve body 1 corresponding to the upper part of the first liquid inlet cavity 211, the interior of the second liquid inlet cavity 214 is interconnected with the interiors of the first liquid inlet cavity 211 and the second liquid storage cavity 213, and a third liquid inlet cavity interconnected with the second liquid inlet cavity 214 is opened in the interior of the valve body 1 corresponding to the second liquid inlet cavity 214 215, a fourth liquid inlet chamber 216 interconnected with the third liquid inlet chamber 215 is provided at a position corresponding to the third liquid inlet chamber 215 on a side of the valve body 1 away from the second liquid inlet chamber 214, a overflow chamber 217 interconnected with the first liquid storage chamber 212 is provided at a side of the valve body 1 away from the first liquid inlet chamber 211, a first guide hole 218 is provided inside the valve body 1, and the two ends of the first guide hole 218 are respectively interconnected with the fourth liquid inlet chamber 216 and the overflow chamber 217, a first movable chamber 219 interconnected with the first guide hole 218 is provided at a position corresponding to the first guide hole 218 on the side of the valve body 1, and a second guide hole 2110 is provided inside the valve body 1 at a position corresponding to the first movable chamber 219, and the two ends of the second guide hole 2110 are respectively connected to the second The liquid storage chamber 213 and the first guide hole 218 are communicated with each other, a first pressure relief pipe 226 is fixedly connected to the outside of the valve body 1, a first pressure relief hole 225 is provided on the side of the third liquid inlet chamber 215, the first pressure relief hole 225 and the first pressure relief pipe 226 are communicated with each other, a drainage chamber 312 is provided on the side of the second liquid storage chamber 213, a fourth pressure relief hole 317 is provided on the side of the drainage chamber 312, the fourth pressure relief hole 317 and the first pressure relief pipe 226 are communicated with each other, a second pressure relief hole 227 and a third pressure relief hole 228 extending to the outside of the valve body 1 are respectively provided on the side of the fourth liquid inlet chamber 216 and the side of the overflow chamber 217, a first pressure relief structure is provided inside the second liquid storage chamber 213, the second liquid inlet chamber 214, the third liquid inlet chamber 215 and the first pressure relief hole 317 are communicated with each other, A second pressure relief structure is provided inside the fourth liquid inlet cavity 216, a third pressure relief structure is provided inside the overflow cavity 217, a fourth pressure relief structure is provided inside the first movable cavity 219, a third guide hole 221 is provided on the side of the first liquid inlet cavity 211, a first overflow hole 222 is provided on the end of the third guide hole 221 away from the first liquid inlet cavity 211, the first liquid inlet cavity 211 and the second liquid inlet cavity 214 are connected to each other through the third guide hole 221 and the first overflow hole 222, a second overflow hole 223 is provided on the end of the first liquid inlet cavity 211 corresponding to the first liquid storage cavity 212, the first liquid inlet cavity 211 and the first liquid storage cavity 212 are connected to each other through the second overflow hole 223, a third overflow hole 224 is provided on the side of the second liquid inlet cavity 214,The second liquid inlet chamber 214 is connected to the second liquid storage chamber 213 through the third overflow hole 224. The opening end of the second liquid inlet chamber 214 is movably installed with a first plug 231, the opening end of the fourth liquid inlet chamber 216 is movably installed with a third plug 233, the opening end of the overflow chamber 217 is movably installed with a fourth plug 234, and the opening end of the first liquid storage chamber 212 is movably installed with a second plug 232. In normal use, the end faces of the second liquid inlet chamber 214, the fourth liquid inlet chamber 216, the first liquid storage chamber 212 and the overflow chamber 217 are sealed, and the hydraulic oil enters the interior of the valve body 1 from the first liquid inlet chamber 211 and enters the interior of the first liquid storage chamber 212, the second liquid storage chamber 213 and the second liquid inlet chamber 214. At this time, the oil in the second liquid storage chamber 213 is divided into two parts, upper and lower, by the first pressure relief structure. When the pressure of the hydraulic oil suddenly increases, the second pressure relief structure opens. The hydraulic oil flows from the second liquid inlet chamber 214 into the third liquid inlet chamber 215, and then flows through the first pressure relief hole 225 to the first pressure relief pipe 226. When passing through the first pressure relief pipe 226, the hydraulic oil is discharged back to the oil tank. At this time, the first pressure relief structure is also opened, and the hydraulic oil flows through the fourth pressure relief hole 317 into the first pressure relief pipe 226. When passing through the first pressure relief pipe 226, the hydraulic oil is discharged back to the oil tank. At this time, the pressure relief action is completed. When the internal hydraulic oil increases again, the second pressure relief structure and the third pressure relief structure discharge the hydraulic oil into the first guide hole 218, and then discharge it through the third pressure relief structure. When the internal oil increases again, the oil inside the second pressure relief structure is directly discharged through the second pressure relief hole 227, and the oil inside the third pressure relief structure is directly discharged through the third pressure relief hole 228, so as to realize multi-stage oil discharge control.

[0023] The first pressure relief structure includes a mounting cylinder 311 fixedly mounted inside the second liquid storage chamber 213, a first adapting cavity 313 is provided on the side of the mounting cylinder 311 corresponding to the position of the fourth pressure relief hole 317, a moving barrel 315 is movably mounted inside the mounting cylinder 311, a first spring 314 is fixedly connected to the upper end of the moving barrel 315, the upper end of the first spring 314 is fixedly connected to the top side of the second liquid storage chamber 213, the moving barrel 315 is a circular barrel with an opening at the lower end, a second adapting cavity 316 adapted to the first adapting cavity 313 is provided on the side of the moving barrel 315, and the second pressure relief structure is not opened. When it is open, the pressure inside the second liquid storage chamber 213 is the same as the pressure above and below the moving barrel 315. When the second pressure relief valve is opened, the liquid inside the second liquid inlet chamber 214 enters the third liquid inlet chamber 215, and then enters the first pressure relief hole 225 through the third liquid inlet chamber 215 for discharge. At this time, the pressure above and below the moving barrel 315 is different, and the moving barrel 315 moves upward, so that the second adapter chamber 316 is docked with the position of the first adapter chamber 313. At this time, the oil below the moving barrel 315 is discharged through the second adapter chamber 316, the first adapter chamber 313 and the fourth pressure relief hole 317.

[0024] The second pressure relief structure includes a first externally threaded ring 411 threadedly connected to the inside of the fourth liquid inlet chamber 216, a first movable ring 412 is movably installed on one end of the first externally threaded ring 411, a second spring 413 is fixedly connected to the end of the first movable ring 412 away from the first externally threaded ring 411, a first blocking block 414 is fixedly connected to the end of the second spring 413 away from the first movable ring 412, a first connecting rod 415 is fixedly connected to the end of the first blocking block 414 away from the second spring 413, and a second blocking block 416 is fixedly connected to the end of the first connecting rod 415 away from the first blocking block 414. The diameter of the fourth liquid inlet chamber 216 is greater than the diameter of the second liquid inlet chamber 214, and an oil limit block 417 is fixedly connected to the inside of the second liquid inlet chamber 214 at a position corresponding to the second blocking block 416. When the internal pressure of the valve body 1 increases during use, the hydraulic oil pushes the second blocking block 416. When the second block 416 moves to the inside of the third liquid inlet chamber 215, the oil in the second liquid inlet chamber 214 flows out through the third liquid inlet chamber 215 and the first pressure relief hole 225. When the oil pressure continues to increase, the oil pressure pushes the first block 414 to move. When the first block 414 passes over the first guide hole 218, the oil in the fourth liquid inlet chamber 216 is discharged through the fourth pressure relief structure. When the internal pressure continues to increase, when the first block 414 moves to the side of the second pressure relief hole 227, the hydraulic oil is directly discharged through the second pressure relief hole 227. A second movable chamber 421 is provided at one end of the first movable ring 412 corresponding to the first external threaded ring 411, and a second movable ring 422 is fixedly installed at one end of the first external threaded ring 411 corresponding to the first movable ring 412. The second movable ring 422 is movably installed in the inside of the second movable chamber 421.

[0025] The third pressure relief structure includes a second external threaded ring 511 threadedly connected to the overflow chamber 217, a third movable ring 512 is movably installed at one end of the second external threaded ring 511, a third spring 513 is fixedly connected to one end of the third movable ring 512 away from the second external threaded ring 511, and a third blocking block 514 is fixedly connected to one end of the third spring 513 away from the second external threaded ring 511. When the pressure of the hydraulic oil in the valve body 1 increases, the third blocking block 514 is squeezed, and the third blocking block 514 moves. When the third blocking block 514 moves to the first When the third block 514 moves to the side of the third pressure relief hole 228 when the internal pressure continues to increase, the hydraulic oil is directly discharged through the third pressure relief hole 228. The third movable ring 512 is provided with a third movable cavity 521 at one end corresponding to the second external threaded ring 511. The fourth movable ring 522 is fixedly installed at one end of the second external threaded ring 511 corresponding to the third movable ring 512. The fourth movable ring 522 is movably installed in the interior of the third movable cavity 521. The fourth pressure relief structure includes a second pressure relief pipe 721 movably installed in the first movable chamber 219, one end of the second pressure relief pipe 721 is fixedly connected to a movable pipe 722, the movable pipe 722 extends to the inside of the second guide hole 2110, the second pressure relief pipe 721 and the movable pipe 722 are connected to each other, the movable pipe 722 has a liquid inlet hole 723 at a position corresponding to the first guide hole 218, the side of the movable pipe 722 has a fifth liquid inlet cavity 724 at a position corresponding to the second guide hole 2110, one end of the second pressure relief pipe 721 is provided with a drain hole 725, and the drain hole 725 has a fifth plug movably installed therein. Head 726, a mounting block 731 is installed on the side of the valve body 1 corresponding to the position of the second pressure relief pipe 721, an internal threaded ring 732 is fixedly installed on the side of the mounting block 731 corresponding to the outer side of the second pressure relief pipe 721, a threaded groove is provided on the outer side of the second pressure relief pipe 721 corresponding to the position of the internal threaded ring 732, the second pressure relief pipe 721 is threadedly connected to the inside of the internal threaded ring 732, and a locking threaded ring 733 is threadedly connected to the outer side of the second pressure relief pipe 721, the hydraulic oil enters the second pressure relief pipe 721 through the first guide hole 218 and the liquid inlet hole 723, and is then discharged outward through the drain hole 725 to complete the pressure relief action.

[0026] The end surface of the first blocking block 414 is fixedly connected with the first moving rod 418, and the first moving rod 418 extends to the outside of the valve body 1. The end surface of the third blocking block 514 is fixedly connected with the second moving rod 515, and the second moving rod 515 extends to the outside of the valve body 1. A limiting cavity 611 is provided on the side of the first moving rod 418, and a third moving rod 612 is fixedly installed on the side of the second moving rod 515 corresponding to the position of the limiting cavity 611, and the third moving rod 612 extends to the inside of the limiting cavity 611. When the hydraulic oil pressure inside the valve body 1 begins to increase initially, the first moving rod 418 and the third blocking block 514 move synchronously, and the second blocking block 416 moves a certain distance inside the second liquid inlet cavity 214. By judging whether the second moving rod 515 and Whether the movement of the first moving rod 418 is synchronized can be used to preliminarily determine whether there are problems with the second pressure relief structure and the third pressure relief structure. When the second pressure relief structure leaks and cannot be used normally, the second moving rod 515 will drive the third moving rod 612 to move when it moves, and the third moving rod 612 will drive the first moving rod 418 to move inside the limiting cavity 611, and the first moving rod 418 drives the first blocking block 414, the first connecting rod 415 and the second blocking block 416 to move, so that the first connecting rod 415 moves to the position of the third liquid inlet cavity 215 to perform a pressure relief action. The end surface of the moving barrel 315 is provided with a fourth active cavity 713, and the fourth active cavity 713 is movably installed with a threaded rod 711, and the threaded rod 7 A pressing block 712 is fixedly installed on the upper end of 11, and the threaded rod 711 is threadedly connected to the second plug 232. After a period of use, the dirt in the oil will adhere to the inside of the valve body 1. At this time, kerosene is needed to clean the internal dirt. When the threaded rod 711 moves downward, the threaded rod 711 drives the pressing block 712 to move downward, and the pressing block 712 drives the moving barrel 315 to move downward until the moving barrel 315 moves to the bottom of the installation cylinder 311, and the moving barrel 315 is separated from the installation cylinder 311, and then the second pressure relief pipe 721 is moved. When the second pressure relief pipe 721 moves, it pushes the third moving rod 612 to move, and the third moving rod 612 drives the second moving rod 515 and the first moving rod 418 to move, and the first connecting rod 415 The first block 414 is moved to the side of the second pressure relief hole 227, the second moving rod 515 is moved to the side of the third pressure relief hole 228 with the third block 514, and the fifth liquid inlet chamber 724 is moved to the inside of the first movable chamber 219. At this time, kerosene is poured into the first liquid inlet chamber 211 and the second liquid inlet chamber 214 to dissolve the oil stains. The internal kerosene flows in the first liquid inlet chamber 211, the third guide hole 221, the first overflow hole 222, the second liquid inlet chamber 214, the third liquid inlet chamber 215, the fourth liquid inlet chamber 216, the first guide hole 218, the second overflow hole 223, the first liquid storage chamber 212, the second liquid storage chamber 213, the overflow chamber 217, the fourth pressure relief hole 317, the second guide hole 2110 and the second pressure relief pipe 721.The liquid flows out from the first pressure relief pipe 226, the second pressure relief hole 227, the third pressure relief hole 228 and the drain hole 725 to dissolve and clean the inside.

[0027] Working principle of the present invention: During use, during normal use, the end faces of the second liquid inlet chamber 214, the fourth liquid inlet chamber 216, the first liquid storage chamber 212 and the overflow chamber 217 are sealed, and the hydraulic oil enters the interior of the valve body 1 from the first liquid inlet chamber 211 and enters the interior of the first liquid storage chamber 212, the second liquid storage chamber 213, and the second liquid inlet chamber 214. At this time, the oil in the second liquid storage chamber 213 is divided into two parts, upper and lower, by the first pressure relief structure. When the pressure of the hydraulic oil suddenly increases, the second pressure relief structure opens, and the hydraulic oil flows from the interior of the second liquid inlet chamber 214 into the interior of the third liquid inlet chamber 215, and then flows through the first pressure relief hole 225 to the interior of the first pressure relief pipe 226. When passing through the first pressure relief pipe 226, the hydraulic oil is discharged back to the oil tank. At this time, the first pressure relief structure is also opened, and the hydraulic oil passes The hydraulic oil flows into the first pressure relief pipe 226 through the fourth pressure relief hole 317, and the hydraulic oil is discharged back to the oil tank through the first pressure relief pipe 226. At this time, the pressure relief action is completed. When the internal hydraulic oil increases again, the second pressure relief structure and the third pressure relief structure discharge the hydraulic oil to the first guide hole 218, and then discharge it through the third pressure relief structure. When the internal oil increases again, the oil inside the second pressure relief structure is directly discharged through the second pressure relief hole 227, and the oil inside the third pressure relief structure is directly discharged through the third pressure relief hole 228, so as to realize multi-stage oil discharge control. When the second pressure relief structure is not opened, the pressure inside the second liquid storage chamber 213 corresponding to the upper and lower positions of the moving barrel 315 is the same. When the second pressure relief valve is opened, the liquid enters the second liquid inlet chamber 2 14, the liquid inside enters the third liquid inlet chamber 215, and then enters the first pressure relief hole 225 through the third liquid inlet chamber 215 for discharge. At this time, the upper and lower pressures of the moving barrel 315 are different, and the moving barrel 315 moves upward, so that the second adapter chamber 316 is docked with the position of the first adapter chamber 313. At this time, the oil under the moving barrel 315 is discharged through the second adapter chamber 316, the first adapter chamber 313 and the fourth pressure relief hole 317. When the pressure inside the valve body 1 increases during use, the hydraulic oil pushes the second blocking block 416 to move. When the second blocking block 416 moves to the third liquid inlet chamber 215, the oil inside the second liquid inlet chamber 214 flows out through the third liquid inlet chamber 215 and the first pressure relief hole 225. When the oil pressure continues to increase, the oil pressure pushes the second blocking block 416 to move. A block 414 moves. When the first block 414 passes over the first guide hole 218, the oil in the fourth liquid inlet chamber 216 is discharged through the fourth pressure relief structure. When the internal pressure continues to increase, the first block 414 moves to the side of the second pressure relief hole 227, and the hydraulic oil is directly discharged through the second pressure relief hole 227. When the pressure of the hydraulic oil in the valve body 1 increases, the third block 514 will be squeezed. The third block 514 moves. When the third block 514 moves to the side of the first guide hole 218, the oil in the overflow chamber 217 is discharged through the fourth pressure relief structure. When the internal pressure continues to increase, the third block 514 moves to the side of the third pressure relief hole 228, and the hydraulic oil is directly discharged through the third pressure relief hole 228.The hydraulic oil enters the second pressure relief pipe 721 through the first guide hole 218 and the liquid inlet hole 723, and then is discharged outward through the drain hole 725 to complete the pressure relief action. When the hydraulic oil pressure inside the valve body 1 initially begins to increase, the first moving rod 418 and the third blocking block 514 move synchronously, and the second blocking block 416 moves a certain distance inside the second liquid inlet chamber 214. By judging whether the movement of the second moving rod 515 and the first moving rod 418 is synchronized, it is preliminarily judged whether there is a problem with the second pressure relief structure and the third pressure relief structure. When the second pressure relief structure leaks and cannot be used normally, the second moving rod 515 is When 515 moves, it will drive the third moving rod 612 to move, and the third moving rod 612 will drive the first moving rod 418 to move inside the limiting cavity 611, and the first moving rod 418 drives the first blocking block 414, the first connecting rod 415 and the second blocking block 416 to move, so that the first connecting rod 415 moves to the position of the third liquid inlet cavity 215 to perform a pressure relief action. After a period of use, the dirt in the oil will adhere to the inside of the valve body 1. At this time, kerosene is needed to clean the internal dirt. When the threaded rod 711 moves downward, the threaded rod 711 drives the pressing block 712 to move downward, and the pressing block 712 drives the moving barrel 315 The movable barrel 315 moves downward until it moves to the bottom of the installation barrel 311, the movable barrel 315 is separated from the installation barrel 311, and then the second pressure relief pipe 721 is moved. When the second pressure relief pipe 721 moves, it pushes the third movable rod 612 to move, and the third movable rod 612 drives the second movable rod 515 and the first movable rod 418 to move. The first connecting rod 415 moves the first blocking block 414 to the side of the second pressure relief hole 227, and the second movable rod 515 moves the third blocking block 514 to the side of the third pressure relief hole 228. The fifth liquid inlet chamber 724 moves to the inside of the first movable chamber 219. At this time, the liquid inlet chamber 211 is moved to the first liquid inlet chamber 211. The kerosene is poured into the second liquid inlet chamber 214 to dissolve the oil stains. The internal kerosene flows through the first liquid inlet chamber 211, the third guide hole 221, the first overflow hole 222, the second liquid inlet chamber 214, the third liquid inlet chamber 215, the fourth liquid inlet chamber 216, the first guide hole 218, the second overflow hole 223, the first liquid storage chamber 212, the second liquid storage chamber 213, the overflow chamber 217, the fourth pressure relief hole 317, the second guide hole 2110 and the second pressure relief pipe 721, and flows out from the first pressure relief pipe 226, the second pressure relief hole 227, the third pressure relief hole 228 and the discharge hole 725 respectively to dissolve and clean the inside.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressure-stabilizing overflow valve that is easy to adjust, comprising a valve body (1), a first liquid inlet cavity (211) being formed on a side of the valve body (1), and characterized in that: The bottom side of the valve body (1) is provided with a first liquid storage cavity (212), the first liquid storage cavity (212) and the first liquid inlet cavity (211) are interconnected, the interior of the valve body (1) is provided with a second liquid storage cavity (213) corresponding to the upper side of the first liquid storage cavity (212), the second liquid storage cavity (213) and the first liquid storage cavity (212) are interconnected, the side of the valve body (1) is provided with a second liquid inlet cavity (214) corresponding to the upper side of the first liquid inlet cavity (211), the interior of the second liquid inlet cavity (214) is interconnected with the interiors of the first liquid inlet cavity (211) and the second liquid storage cavity (213), and the interior of the valve body (1) is provided with a second liquid inlet cavity (214) corresponding to the upper side of the first liquid inlet cavity (211). A third liquid inlet cavity (215) is interconnected with the second liquid inlet cavity (214); a fourth liquid inlet cavity (216) is provided on a side of the valve body (1) away from the second liquid inlet cavity (214) at a position corresponding to the third liquid inlet cavity (215) and is interconnected with the third liquid inlet cavity (215); an overflow cavity (217) is provided on a side of the valve body (1) away from the first liquid inlet cavity (211) and is interconnected with the first liquid storage cavity (212); a first guide hole (218) is provided inside the valve body (1); two ends of the first guide hole (218) are respectively interconnected with the fourth liquid inlet cavity (216) and the overflow cavity (217); a side of the valve body (1) corresponds to the first guide hole (218) A first movable cavity (219) is provided at a position thereof and is interconnected with the first guide hole (218); a second guide hole (2110) is provided inside the valve body (1) at a position corresponding to the first movable cavity (219); two ends of the second guide hole (2110) are respectively interconnected with the second liquid storage cavity (213) and the first guide hole (218); a first pressure relief pipe (226) is fixedly connected to the outside of the valve body (1); a first pressure relief hole (225) is provided on the side of the third liquid inlet cavity (215); the first pressure relief hole (225) is interconnected with the first pressure relief pipe (226); a drainage cavity (312) is provided on the side of the second liquid storage cavity (213); the drainage cavity (312) is A fourth pressure relief hole (317) is provided on the side of the valve body (12), the fourth pressure relief hole (317) is communicated with the first pressure relief pipe (226), a second pressure relief hole (227) and a third pressure relief hole (228) are respectively provided on the side of the fourth liquid inlet chamber (216) and the side of the overflow chamber (217), and extend to the outside of the valve body (1), a first pressure relief structure is provided inside the second liquid storage chamber (213), a second pressure relief structure is provided inside the second liquid inlet chamber (214), the third liquid inlet chamber (215) and the fourth liquid inlet chamber (216), a third pressure relief structure is provided inside the overflow chamber (217), and a fourth pressure relief structure is provided inside the first movable chamber (219).

2. The easily adjustable pressure-stabilizing relief valve according to claim 1, characterized in that: A third guide hole (221) is provided on the side of the first liquid inlet cavity (211); a first overflow hole (222) is provided at one end of the third guide hole (221) away from the first liquid inlet cavity (211); the first liquid inlet cavity (211) and the second liquid inlet cavity (214) are in communication with each other through the third guide hole (221) and the first overflow hole (222); a second overflow hole (223) is provided at one end of the first liquid inlet cavity (211) corresponding to the first liquid storage cavity (212); the first liquid inlet cavity (211) and the first liquid storage cavity (212) are in communication with each other through the second overflow hole (223). 23) are interconnected, a third overflow hole (224) is provided on the side of the second liquid inlet cavity (214), the second liquid inlet cavity (214) and the second liquid storage cavity (213) are interconnected through the third overflow hole (224), a first plug (231) is movably mounted on the open end of the second liquid inlet cavity (214), a third plug (233) is movably mounted on the open end of the fourth liquid inlet cavity (216), a fourth plug (234) is movably mounted on the open end of the overflow cavity (217), and a second plug (232) is movably mounted on the open end of the first liquid storage cavity (212).

3. The easily adjustable pressure-stabilizing relief valve according to claim 2, characterized in that: The first pressure relief structure comprises a mounting tube (311) fixedly mounted inside the second liquid storage chamber (213); a first adapting chamber (313) is provided on a side surface of the mounting tube (311) at a position corresponding to a fourth pressure relief hole (317); a movable barrel (315) is movably mounted inside the mounting tube (311); a first spring (314) is fixedly connected to the upper end of the movable barrel (315); the upper end of the first spring (314) is fixedly connected to the top side of the second liquid storage chamber (213); the movable barrel (315) is a circular barrel with an opening at the lower end; and a second adapting chamber (316) adapted to the first adapting chamber (313) is provided on a side surface of the movable barrel (315).

4. The easily adjustable pressure-stabilizing relief valve according to claim 3, characterized in that: The second pressure relief structure comprises a first externally threaded ring (411) threadedly connected to the inside of the fourth liquid inlet chamber (216); a first movable ring (412) is movably mounted on one end of the first externally threaded ring (411); an end of the first movable ring (412) away from the first externally threaded ring (411) is fixedly connected to a second spring (413); an end of the second spring (413) away from the first movable ring (412) is fixedly connected to a first blocking block (414); an end of the first blocking block (414) away from the second spring (413) is fixedly connected to a first connecting rod (415); an end of the first connecting rod (415) away from the first blocking block (414) is fixedly connected to a second blocking block (416); the diameter of the fourth liquid inlet chamber (216) is greater than the diameter of the second liquid inlet chamber (214); and a limiting block (417) is fixedly connected to a position of the second blocking block (416) inside the second liquid inlet chamber (214).

5. The easily adjustable pressure-stabilizing relief valve according to claim 4, characterized in that: A second movable cavity (421) is provided at one end of the first movable ring (412) corresponding to the first externally threaded ring (411); a second movable ring (422) is fixedly mounted at one end of the first externally threaded ring (411) corresponding to the first movable ring (412); and the second movable ring (422) is movably mounted inside the second movable cavity (421).

6. The easily adjustable pressure-stabilizing relief valve according to claim 5, characterized in that: The third pressure relief structure comprises a second externally threaded ring (511) threadedly connected inside the overflow chamber (217); a third movable ring (512) is movably mounted on one end of the second externally threaded ring (511); an end of the third movable ring (512) away from the second externally threaded ring (511) is fixedly connected to a third spring (513); and an end of the third spring (513) away from the second externally threaded ring (511) is fixedly connected to a third blocking block (514).

7. The easily adjustable pressure-stabilizing relief valve according to claim 6, characterized in that: A third movable cavity (521) is provided at one end of the third movable ring (512) corresponding to the second externally threaded ring (511), and a fourth movable ring (522) is fixedly mounted at one end of the second externally threaded ring (511) corresponding to the third movable ring (512), and the fourth movable ring (522) is movably mounted inside the third movable cavity (521).

8. The easily adjustable pressure-stabilizing relief valve according to claim 7, characterized in that: The fourth pressure relief structure comprises a second pressure relief pipe (721) movably mounted inside the first movable cavity (219); one end of the second pressure relief pipe (721) is fixedly connected to a movable pipe (722); the movable pipe (722) extends to the inside of the second guide hole (2110); the second pressure relief pipe (721) and the movable pipe (722) are interconnected; a liquid inlet hole (723) is provided inside the movable pipe (722) at a position corresponding to the first guide hole (218); a fifth liquid inlet cavity (724) is provided on the side of the movable pipe (722) at a position corresponding to the second guide hole (2110); the second pressure relief pipe (721) A discharge hole (725) is provided at one end of the valve body (1), a fifth plug (726) is movably installed inside the discharge hole (725), a mounting block (731) is installed at a position corresponding to the second pressure relief pipe (721) on the side of the valve body (1), an internal threaded ring (732) is fixedly installed on the side of the mounting block (731) corresponding to the outer side of the second pressure relief pipe (721), a threaded groove is provided on the outer side of the second pressure relief pipe (721) at a position corresponding to the internal threaded ring (732), the second pressure relief pipe (721) is threadedly connected to the inside of the internal threaded ring (732), and a locking threaded ring (733) is threadedly connected to the outer side of the second pressure relief pipe (721).

9. The easily adjustable pressure-stabilizing relief valve according to claim 8, characterized in that: The end surface of the first blocking block (414) is fixedly connected to a first movable rod (418), and the first movable rod (418) extends to the outside of the valve body (1); the end surface of the third blocking block (514) is fixedly connected to a second movable rod (515), and the second movable rod (515) extends to the outside of the valve body (1); a limiting cavity (611) is provided on the side surface of the first movable rod (418); a third movable rod (612) is fixedly installed on the side surface of the second movable rod (515) at a position corresponding to the limiting cavity (611), and the third movable rod (612) extends to the inside of the limiting cavity (611).

10. The easily adjustable pressure-stabilizing relief valve according to claim 9, characterized in that: The end surface of the movable barrel (315) is provided with a fourth movable cavity (713), a threaded rod (711) is movably installed inside the fourth movable cavity (713), a pressing block (712) is fixedly installed at the upper end of the threaded rod (711), and the threaded rod (711) is threadedly connected to the second plug (232).

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