A multifunctional hydraulic multi-way valve

Abstract

The present invention relates to the technical field of hydraulic valves, and in particular to a multifunctional hydraulic multi-way valve, comprising two assembled valve bodies, wherein a semicircular liquid storage tank is provided on each adjacent side of the two assembled valve bodies, a liquid inlet half hole and two liquid outlet half holes are provided on each of the two assembled valve bodies, a plurality of first bolts are threadedly connected between the two assembled valve bodies, two sealing pistons are provided for sliding sealing between the two semicircular liquid storage tanks, and a round rod is slidably inserted on the two sealing pistons; the present invention converts the discharge flow direction through the action of a flow direction conversion mechanism, and when the internal hydraulic pressure rises to a limit value that may cause damage through the action of a hydraulic protection mechanism, the two blocked liquid outlet half holes cooperate to open the overflow, thereby reducing the hydraulic pressure inside the two semicircular liquid storage tanks and ensuring the safety of the diversion system.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic valves, and in particular to a multifunctional hydraulic multi-way valve. Background Art

[0002] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of the oil, gas, and water pipeline systems of a hydropower station.

[0003] The patent document with publication number CN213598292U discloses a multifunctional hydraulic multi-way valve, which includes a feed box, a plurality of diverter valves arranged on one side of the feed box, and a discharge box arranged on the other side of the diverter valve, wherein a feed slot is provided inside the feed box, and the diverter valve includes a shell, a through slot is provided in the middle of the shell, through holes are provided on both sides of the shell, a transfer box is provided inside the through slot, two connection slots are provided inside the transfer box, and a transfer tube is plugged into the connection slot at the rear.

[0004] The hydraulic lock structure of the existing hydraulic multi-way valve is complex, and the external shell is mostly an integral welded structure. When the components inside the valve body are damaged, it is not convenient to disassemble and maintain. During the process of flow and reverse control, when the hydraulic pressure increases, the valve body needs to perform effective drainage protection according to the increase in hydraulic pressure, and the drainage position usually does not have the function of automatic return after the pressure is restored. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multifunctional hydraulic multi-way valve.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a multifunctional hydraulic multi-way valve, comprising two assembled valve bodies, each of the adjacent sides of the two assembled valve bodies is provided with a semicircular liquid storage tank, each of the two assembled valve bodies is provided with a liquid inlet half hole and two liquid outlet half holes, the liquid inlet half hole and the liquid outlet half hole are both connected to the corresponding semicircular liquid storage tank, and a plurality of first bolts are threadedly connected between the two assembled valve bodies;

[0007] There are two sealing pistons for sliding seal between the two semicircular liquid storage tanks, and a circular rod is inserted into the two sealing pistons for sliding sliding. A first placement groove is opened on the adjacent side of the two assembled valve bodies, and the first placement groove is communicated with the corresponding semicircular liquid storage tank. The circular rod is slidingly sealed between the two first placement grooves, a flow direction conversion mechanism is connected between the circular rod and the sealing piston, a hydraulic protection mechanism is connected to the sealing piston, and a flow sealing mechanism is connected between the two assembled valve bodies.

[0008] Preferably, the flow direction conversion mechanism includes a mounting ring, which is sleeved on the surface of the circular rod and located between the two sealing pistons. A second bolt is threadedly connected between the mounting ring and the circular rod. Circular shells are slidingly sealed at both ends between the two semicircular liquid storage tanks. The circular shells are slidably inserted on the circular rod. A plurality of limit pins are fixedly connected to the inside of the circular shell along the circumferential direction. The limit pins are slidably inserted on the corresponding sealing pistons. Springs are sleeved on the limit pins, and the springs are fixedly connected between the corresponding circular shells and the sealing pistons. An axial driving mechanism is connected to the circular rod.

[0009] Preferably, the hydraulic protection mechanism includes two connecting pipes, and the two connecting pipes are respectively fixedly connected to the two circular shells. Two second placement grooves are provided on the adjacent sides of the two assembled valve bodies, and the second placement grooves are connected to the corresponding semicircular liquid storage tanks. The connecting pipe is located between the two corresponding second placement grooves, and an air pump is fixedly installed at one end of the connecting pipe, and a hydraulic monitoring device is fixedly installed on the mounting ring.

[0010] Preferably, the axial drive mechanism includes a mounting frame, which is arranged at one end of the two assembled valve bodies, and a plurality of connecting rings are fixedly connected to the side of the mounting frame, and a third bolt is threadedly connected between the connecting ring and the corresponding assembled valve body, and a hydraulic cylinder is fixedly installed on the mounting frame, and the output shaft of the hydraulic cylinder passes through the mounting frame and extends to the interior of the mounting frame and is fixedly connected to the circular rod.

[0011] Preferably, a plurality of guide pins are fixedly connected to one side of one of the assembled valve bodies, and a plurality of limiting holes are opened on one side of the other assembled valve body, and the guide pins are respectively located inside the corresponding limiting holes.

[0012] Preferably, the circulation sealing mechanism includes a liquid inlet ring and two liquid discharge rings, the liquid inlet ring is arranged between the two liquid inlet half holes, and each of the liquid discharge rings is respectively arranged between the corresponding two liquid outlet half holes, the inner wall of the liquid inlet half hole is provided with a first semi-ring groove, the liquid inlet ring is fixedly connected with a first sealing ring, the first sealing ring is located between the two first semi-ring grooves, the inner wall of the liquid outlet half hole is provided with a second semi-ring groove, the liquid discharge ring is fixedly connected with a second sealing ring, the second sealing ring is located between the corresponding two second semi-ring grooves.

[0013] Preferably, a first thread is provided on the inner wall of the liquid inlet ring, two first circular pins are fixedly connected to the surface of the liquid inlet ring along the circumferential direction, a first plug-in hole is provided on each of the liquid inlet half-holes, and the first circular pins are respectively located inside the corresponding first plug-in holes, a second thread is provided on the inner wall of the liquid discharge ring, two second circular pins are fixedly connected to the surface of the liquid discharge ring along the circumferential direction, a second plug-in hole is provided on each of the liquid outlet half-holes, and the second circular pins are respectively located inside the corresponding second plug-in holes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The flow direction of the discharge is converted by the flow direction conversion mechanism, and when the internal hydraulic pressure rises to a limit value that may cause damage through the hydraulic protection mechanism, the two blocked half-holes for liquid discharge cooperate to open the overflow, thereby reducing the hydraulic pressure inside the two semicircular liquid storage tanks to ensure the safety of the diversion system, and when the hydraulic pressure returns to a normal value, the two half-holes for liquid discharge that overflow are re-blocked to ensure normal flow direction control. The assembled valve bodies can be disassembled through assembly and fixation of the two assembled valve bodies, which is conducive to maintenance and replacement of the internal structure.

[0016] 2. The axial movement of the circular rod drives the mounting ring to move synchronously, so that one end of the mounting ring squeezes the corresponding sealing piston to slide along the circular rod and move to one side from the surface of the two corresponding liquid outlet half-holes, so that the two previously blocked liquid outlet half-holes are opened, and the other sealing piston loses the squeezing as the mounting ring moves, and moves along the sliding joint of the limit pin under the elastic extension of the corresponding spring, and blocks the two previously opened liquid outlet half-holes, thereby changing the flow direction.

[0017] 3. When the hydraulic monitoring device detects that the hydraulic pressure inside the semicircular liquid storage tank has risen to a limit value that may cause damage, gas is extracted through an air pump to reduce the gas pressure between the sealing piston in a blocked state and the adjacent circular shell, so that the sealing piston in a blocked state can move toward the adjacent circular shell under the impact of the hydraulic pressure, and squeeze the corresponding spring to produce compression deformation, so that the blocked liquid outlet half hole is opened and overflows, reducing the hydraulic strength inside the semicircular liquid storage tank and ensuring the safety of the diversion system.

[0018] 4. Under the elastic stretching action of the squeezed spring, the sealing piston automatically returns to its original position while moving to make way and overflowing, thereby reducing the monitoring error of the hydraulic monitoring device and enabling the monitoring value to change in time according to the change of hydraulic pressure. When the sealing piston returns to its initial position through the elastic stretching action of the spring and the monitoring value of the hydraulic monitoring device drops below the safe value, the air pump again draws air inward along the connecting pipe, thereby increasing the pressure between the corresponding circular shell and the sealing piston and reducing overflow under normal hydraulic strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0021] Figure 3 It is a partial structural schematic diagram of the present invention (one of the assembled valve bodies is hidden);

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at B in FIG.

[0023] Figure 5 For the present invention Figure 3 A schematic diagram of the structure at position C in FIG.

[0024] Figure 6 It is a schematic diagram of the matching structure of the round rod and the mounting ring of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at D in FIG.

[0026] Figure 8 It is a schematic diagram of the matching structure of the assembled valve body and the guide pin of the present invention;

[0027] In the figure: 1. assembled valve body; 2. semicircular liquid storage tank; 3. liquid inlet half hole; 4. liquid outlet half hole; 5. first bolt; 6. sealing piston; 7. round rod; 8. first placement groove; 9. mounting ring; 10. second bolt; 11. round shell; 12. limit pin; 13. spring; 14. connecting pipe; 15. second placement groove; 16. air pump; 17. hydraulic monitoring device; 18. mounting frame; 19. connecting ring; 20. third bolt; 21. hydraulic cylinder; 22. guide pin; 23. limit hole; 24. liquid inlet ring; 25. liquid discharge ring; 26. first semi-ring groove; 27. first sealing ring; 28. second semi-ring groove; 29. ​​second sealing ring; 30. first thread; 31. first circular pin; 32. first plug-in hole; 33. second thread; 34. second circular pin; 35. second plug-in hole. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0029] like Figures 1 to 8 The multifunctional hydraulic multi-way valve shown in the figure comprises two assembled valve bodies 1, each of which has a semicircular liquid storage tank 2 on one adjacent side of the two assembled valve bodies 1, and each of which has a liquid inlet half hole 3 and two liquid outlet half holes 4 (such as Figure 8 As shown), the liquid inlet half hole 3 and the liquid outlet half hole 4 are both connected to the corresponding semicircular liquid storage tank 2, and a plurality of first bolts 5 are threadedly connected between the two assembled valve bodies 1;

[0030] There are two sealing pistons 6 for sliding sealing between the two semicircular liquid storage tanks 2, and a circular rod 7 is inserted into the two sealing pistons 6 for sliding sliding together. A first placement groove 8 is opened on the adjacent side of the two assembled valve bodies 1, and the first placement groove 8 is communicated with the corresponding semicircular liquid storage tank 2. The circular rod 7 is slidably sealed between the two first placement grooves 8, and a flow direction conversion mechanism is connected between the circular rod 7 and the sealing piston 6. A hydraulic protection mechanism is connected to the sealing piston 6, and a flow sealing mechanism is connected between the two assembled valve bodies 1. When working, the hydraulic lock structure of the existing hydraulic multi-way valve is complicated, and the external shell is mostly an integral welded structure. When the components inside the valve body are damaged, it is not convenient to enter. The valve body is required to be disassembled and maintained. During the process of flow and reverse control, when the hydraulic pressure increases, the valve body needs to be effectively drained according to the increase of the hydraulic pressure. The drainage position usually does not have the function of automatic return after the pressure is restored. The technical solution can solve the above problems. The specific working method is as follows: two sealing pistons 6 are placed in the semicircular liquid storage tank 2 of one of the assembled valve bodies 1, and the circular rod 7 is axially moved along one end of the corresponding assembled valve body 1, so that one end of the circular rod 7 passes through the two sealing pistons 6 in turn along the corresponding first placement groove 8, and then passes through the first placement groove 8 at the other end, and is limited by the flow direction conversion mechanism, and then Then, the two assembled valve bodies 1 are assembled and fixed by the first bolt 5, so that the two sealing pistons 6 are slidably sealed between the two semicircular liquid storage grooves 2, the circular rod 7 is slidably sealed between the two first placement grooves 8, the liquid inlet pipeline is connected between the two liquid inlet half holes 3, and the liquid discharge pipeline is connected between the corresponding two liquid outlet half holes 4. The circular rod 7 is axially moved between the two first placement grooves 8 by the action of the flow direction conversion mechanism, and the two sealing pistons 6 are driven to move. When one of the sealing pistons 6 completely blocks the corresponding two liquid outlet half holes 4, the other sealing piston 6 is located on one side of the corresponding two liquid outlet half holes 4, so that the unblocked The two liquid outlet half holes 4 discharge liquid and enter the corresponding discharge pipes. The discharge flow direction is converted by the flow direction conversion mechanism. When the internal hydraulic pressure rises to a limit value that may cause damage by the hydraulic protection mechanism, the two blocked liquid outlet half holes 4 cooperate to open the overflow, thereby reducing the hydraulic pressure inside the two semicircular liquid storage tanks 2 to ensure the safety of the diversion system. When the hydraulic pressure returns to a normal value, the two liquid outlet half holes 4 that overflow are re-blocked to ensure normal flow direction control. The two assembled valve bodies 1 are assembled and fixed so that the assembled valve body 1 can be disassembled, which is beneficial to the maintenance and replacement of the internal structure.

[0031] As a further embodiment of the present invention, the flow direction conversion mechanism includes a mounting ring 9, which is sleeved on the surface of the circular rod 7 and located between the two sealing pistons 6 (such as Figure 4 and Figure 6As shown in the figure, a second bolt 10 is threadedly connected between the mounting ring 9 and the circular rod 7, and a circular shell 11 is slidably sealed at both ends of the two semicircular liquid storage tanks 2. The circular shells 11 are slidably inserted on the circular rod 7, and a plurality of limit pins 12 are fixedly connected to the inside of the circular shell 11 along the circumferential direction. The limit pins 12 are slidably inserted on the corresponding sealing pistons 6, and springs 13 are sleeved on the limit pins 12. The spring 13 is fixedly connected between the corresponding circular shell 11 and the sealing piston 6, and an axial driving mechanism is connected to the circular rod 7; when working, the corresponding two liquid outlet half holes 4 are blocked by the surface of the sealing piston 6, and the other sealing piston 6 is located on one side of the other two liquid outlet half holes 4, so that the two unblocked liquid outlet half holes 4 are in a merged state and discharge normally, and the mounting ring 9 is driven into the axial direction through the axial movement of the circular rod 7. The two sealing pistons 6 are moved synchronously, so that one end of the mounting ring 9 squeezes the corresponding sealing piston 6 to slide along the circular rod 7 and moves from the surface of the corresponding two liquid outlet half holes 4 to one side, so that the two previously blocked liquid outlet half holes 4 are opened, and the other sealing piston 6 loses the squeezing with the movement of the mounting ring 9, and moves along the sliding joint of the limit pin 12 under the elastic extension of the corresponding spring 13, and blocks the two previously opened liquid outlet half holes 4, thereby converting the flow direction, and under the movement of the mounting ring 9, the two sealing pistons 6 can be in a semi-blocked state with the corresponding two liquid outlet half holes 4, so that the flow direction can be converted in one direction and opened in two directions, and the circular rod 7 can pass through the sealing piston 6, the mounting ring 9 and the other sealing piston 6 in turn through the threaded fixation of the second bolt 10, and complete the fixed installation of the mounting ring 9.

[0032] As a further embodiment of the present invention, the hydraulic protection mechanism includes two connecting pipes 14, the two connecting pipes 14 are fixedly connected to the two circular shells 11, and two second placement grooves 15 are provided on the adjacent sides of the two assembled valve bodies 1. The second placement grooves 15 are connected to the corresponding semicircular liquid storage tanks 2. The connecting pipe 14 is located between the corresponding two second placement grooves 15. An air pump 16 is fixedly installed at one end of the connecting pipe 14, and a hydraulic monitoring device 17 (such as Figure 4 and Figure 7When working, after the two assembled valve bodies 1 are assembled and fixed, the two semicircular liquid storage tanks 2 are in a connected and sealed state, and a sealed cavity exists between the adjacent circular shell 11 and the sealing piston 6 inside the semicircular liquid storage tank 2 through sliding seal, and gas is infused into the cavity between the circular shell 11 and the sealing piston 6 through the corresponding air pump 16, so that a certain air pressure strength is maintained between the circular shell 11 and the sealing piston 6. When the hydraulic monitoring device 17 detects that the hydraulic pressure inside the semicircular liquid storage tank 2 rises to a limit value that may cause damage, gas is extracted through the air pump 16 to reduce the gas pressure between the sealing piston 6 in the blocked state and the adjacent circular shell 11, so that the sealing piston 6 in the blocked state can move toward the adjacent circular shell 11 under the impact of the hydraulic pressure. , and squeeze the corresponding spring 13 to produce compression deformation, so that the blocked liquid outlet half hole 4 is opened and overflows, reducing the hydraulic strength inside the semicircular liquid storage tank 2, ensuring the safety of the diversion system, and under the elastic extension effect of the squeezed spring 13, the sealing piston 6 is automatically returned while moving to make way and overflowing, reducing the monitoring error of the hydraulic monitoring device 17, so that the monitoring value can be changed in time according to the change of hydraulic pressure. When the sealing piston 6 returns to the initial position through the elastic extension effect of the spring 13 and the monitoring value of the hydraulic monitoring device 17 is reduced to below the safe value, the air pump 16 again intakes air inward along the connecting pipe 14, thereby increasing the pressure between the corresponding circular shell 11 and the sealing piston 6, and reducing overflow under normal hydraulic strength.

[0033] As a further implementation scheme of the present invention, the axial drive mechanism includes a mounting frame 18, which is arranged at one end of the two assembled valve bodies 1. A plurality of connecting rings 19 are fixedly connected to the side of the mounting frame 18, and a third bolt 20 is threadedly connected between the connecting ring 19 and the corresponding assembled valve body 1. A hydraulic cylinder 21 is fixedly installed on the mounting frame 18, and the output shaft of the hydraulic cylinder 21 penetrates the mounting frame 18 and extends to the inside of the mounting frame 18 and is fixedly connected to the circular rod 7. During operation, the circular rod 7 is driven to move axially by the movement of the output shaft of the hydraulic cylinder 21, thereby completing the axial drive of the circular rod 7, and after the two assembled valve bodies 1 are combined and assembled, the connecting ring 19 and the corresponding assembled valve body 1 are fixed by the third bolt 20, thereby completing the fixation between the assembled valve body 1 and the mounting frame 18, which is conducive to subsequent disassembly and maintenance.

[0034] As a further embodiment of the present invention, one side of the assembled valve body 1 is fixedly connected with a plurality of guide pins 22, and one side of the other assembled valve body 1 is provided with a plurality of limiting holes 23 (such as Figure 5As shown), the guide pins 22 are respectively located inside the corresponding limiting holes 23; during operation, when the two assembled valve bodies 1 are combined and assembled, the guide pins 22 are inserted into the corresponding limiting holes 23, so as to guide and limit the position between the two assembled valve bodies 1, thereby increasing the fit and sealing degree of the two assembled valve bodies 1 when they are combined and assembled.

[0035] As a further embodiment of the present invention, the circulation sealing mechanism includes a liquid inlet ring 24 and two liquid discharge rings 25, the liquid inlet ring 24 is arranged between the two liquid inlet half holes 3, and each liquid discharge ring 25 is arranged between the corresponding two liquid outlet half holes 4, and the inner wall of the liquid inlet half hole 3 is provided with a first semi-ring groove 26, and the liquid inlet ring 24 is fixedly connected with a first sealing ring 27, and the first sealing ring 27 is located between the two first semi-ring grooves 26, and the inner wall of the liquid outlet half hole 4 is provided with a second semi-ring groove 28, and the liquid discharge ring 25 is fixedly connected with a first sealing ring 27. There is a second sealing ring 29, which is located between the corresponding two second semi-ring grooves 28; during operation, when the two assembled valve bodies 1 are combined and assembled, the two liquid inlet half holes 3 are combined with each other, and the corresponding two liquid outlet half holes 4 are combined simultaneously, and the liquid inlet ring 24 is fixedly connected with the liquid inlet pipeline, and the liquid discharge ring 25 is fixedly connected with the liquid discharge pipeline, and the sealing effect of the first sealing ring 27 and the second sealing ring 29 is used to reduce leakage at the pipeline connection position and improve the sealing effect of the assembled valve body 1.

[0036] As a further implementation scheme of the present invention, a first thread 30 is provided on the inner wall of the liquid inlet ring 24, and two first circular pins 31 are fixedly connected to the surface of the liquid inlet ring 24 along the circumferential direction, and a first plug hole 32 is provided on each of the liquid inlet half holes 3, and the first circular pins 31 are respectively located inside the corresponding first plug holes 32, and a second thread 33 is provided on the inner wall of the liquid discharge ring 25, and two second circular pins 34 are fixedly connected to the surface of the liquid discharge ring 25 along the circumferential direction, and a second plug hole 35 is provided on each of the liquid outlet half holes 4, and the second circular pins 34 are respectively located inside the corresponding second plug holes 35; when working, the first thread 30 on the inner wall of the liquid inlet ring 24 is threadedly connected to the liquid inlet pipe, and the second thread 33 on the inner wall of the liquid discharge ring 25 is threadedly connected to the liquid discharge pipe, and the first circular pin 31 and the first plug hole 32 are plugged in, and the second circular pin 34 and the second plug hole 35 are limited to prevent the liquid inlet ring 24 and the liquid discharge ring 25 from rotating, thereby improving the stability during the threaded connection process.

[0037] Working principle of the present invention:

[0038] Place the two sealing pistons 6 in the semicircular liquid storage grooves 2 of one of the assembled valve bodies 1, and move the circular rod 7 axially along one end of the corresponding assembled valve body 1, so that one end of the circular rod 7 passes through the two sealing pistons 6 in sequence along the corresponding first placement groove 8, and then passes out along the first placement groove 8 at the other end, and is limited by the flow direction conversion mechanism, and then the two assembled valve bodies 1 are assembled and fixed by the first bolt 5, so that the two sealing pistons 6 are slidably sealed between the two semicircular liquid storage grooves 2, the circular rod 7 is slidably sealed between the two first placement grooves 8, a liquid inlet pipe is connected between the two liquid inlet half holes 3, and a liquid discharge pipe is connected between the corresponding two liquid outlet half holes 4, and the circular rod 7 is axially moved between the two first placement grooves 8 by the action of the flow direction conversion mechanism, and the two sealing pistons 6 are driven to Move, when one of the sealing pistons 6 completely blocks the corresponding two liquid outlet half-holes 4, the other sealing piston 6 is located on one side of the corresponding two liquid outlet half-holes 4, so that the two unblocked liquid outlet half-holes 4 can discharge liquid and enter the corresponding drainage pipes, and the drainage flow direction is converted by the flow direction conversion mechanism, and when the internal hydraulic pressure rises to a limit value that may cause damage by the hydraulic protection mechanism, the two blocked liquid outlet half-holes 4 cooperate to open the overflow, thereby reducing the hydraulic pressure inside the two semicircular liquid storage tanks 2 to ensure the safety of the diversion system, and when the hydraulic pressure returns to a normal value, the two overflowing liquid outlet half-holes 4 are re-sealed to ensure normal flow direction control, and the assembled valve body 1 can be disassembled by assembling and fixing the two assembled valve bodies 1, which is beneficial to the maintenance and replacement of the internal structure.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional hydraulic multi-way valve, comprising two assembled valve bodies (1), characterized in that: A semicircular liquid storage groove (2) is provided on one adjacent side of the two assembled valve bodies (1); a liquid inlet half hole (3) and two liquid outlet half holes (4) are provided on the two assembled valve bodies (1); the liquid inlet half hole (3) and the liquid outlet half hole (4) are both connected to the corresponding semicircular liquid storage groove (2); and a plurality of first bolts (5) are threadedly connected between the two assembled valve bodies (1); There are two sealing pistons (6) for sliding sealing between the two semicircular liquid storage grooves (2), and a circular rod (7) is slidably inserted on the two sealing pistons (6). A first placement groove (8) is provided on the adjacent side of the two assembled valve bodies (1), and the first placement groove (8) is connected to the corresponding semicircular liquid storage groove (2). The circular rod (7) is slidably sealed between the two first placement grooves (8). A flow direction conversion mechanism is connected between the circular rod (7) and the sealing piston (6), a hydraulic protection mechanism is connected to the sealing piston (6), and a flow sealing mechanism is connected between the two assembled valve bodies (1); The flow direction conversion mechanism comprises a mounting ring (9), the mounting ring (9) being sleeved on the surface of the circular rod (7) and being located between the two sealing pistons (6), a second bolt (10) being threadedly connected between the mounting ring (9) and the circular rod (7), a circular shell (11) being slidably sealed at both ends between the two semicircular liquid storage tanks (2), the circular shell (11) being slidably inserted on the circular rod (7), a plurality of limit pins (12) being fixedly connected in the circumferential direction inside the circular shell (11), the limit pins (12) being slidably inserted on the corresponding sealing pistons (6), the limit pins (12) being sleeved with springs (13), the springs (13) being fixedly connected between the corresponding circular shells (11) and the sealing pistons (6), and an axial driving mechanism being connected to the circular rod (7); The hydraulic protection mechanism comprises two connecting pipes (14), the two connecting pipes (14) are respectively fixedly connected to the two circular shells (11), two second placement grooves (15) are provided on adjacent sides of the two assembled valve bodies (1), the second placement grooves (15) are connected to the corresponding semicircular liquid storage tanks (2), the connecting pipe (14) is located between the two corresponding second placement grooves (15), an air pump (16) is fixedly installed at one end of the connecting pipe (14), and a hydraulic monitoring device (17) is fixedly installed on the mounting ring (9); The axial drive mechanism comprises a mounting frame (18), the mounting frame (18) being arranged at one end of the two assembled valve bodies (1), a plurality of connecting rings (19) being fixedly connected to the side surface of the mounting frame (18), a third bolt (20) being threadedly connected between the connecting ring (19) and the corresponding assembled valve body (1), a hydraulic cylinder (21) being fixedly mounted on the mounting frame (18), an output shaft of the hydraulic cylinder (21) passing through the mounting frame (18) and extending to the interior of the mounting frame (18) and then fixedly connected to the circular rod (7); One side of one of the assembled valve bodies (1) is fixedly connected with a plurality of guide pins (22), and one side of the other assembled valve body (1) is provided with a plurality of limit holes (23), wherein the guide pins (22) are respectively located inside corresponding limit holes (23).

2. A multifunctional hydraulic multi-way valve according to claim 1, characterized in that: The circulation sealing mechanism comprises a liquid inlet ring (24) and two liquid discharge rings (25), wherein the liquid inlet ring (24) is arranged between the two liquid inlet half holes (3), and each of the liquid discharge rings (25) is arranged between the corresponding two liquid outlet half holes (4). The inner wall of each of the liquid inlet half holes (3) is provided with a first semi-annular groove (26), and the liquid inlet ring (24) is fixedly connected with a first sealing ring (27), and the first sealing ring (27) is located between the two first semi-annular grooves (26). The inner wall of each of the liquid outlet half holes (4) is provided with a second semi-annular groove (28), and the liquid discharge ring (25) is fixedly connected with a second sealing ring (29), and the second sealing ring (29) is located between the corresponding two second semi-annular grooves (28).

3. A multifunctional hydraulic multi-way valve according to claim 2, characterized in that: The inner wall of the liquid inlet ring (24) is provided with a first thread (30), the surface of the liquid inlet ring (24) is fixedly connected with two first circular pins (31) in a circumferential direction, the liquid inlet half-holes (3) are provided with first plug holes (32), the first circular pins (31) are respectively located inside the corresponding first plug holes (32), the inner wall of the liquid discharge ring (25) is provided with a second thread (33), the surface of the liquid discharge ring (25) is fixedly connected with two second circular pins (34) in a circumferential direction, the liquid outlet half-holes (4) are provided with second plug holes (35), the second circular pins (34) are respectively located inside the corresponding second plug holes (35).

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