Double-oil-source two-position six-way reversing valve without oil channeling and working method thereof

Abstract

The present application relates to the technical field of hydraulic electromagnetic valves, and discloses a two-position six-way reversing valve without oil channeling and a working method thereof, the two-position six-way reversing valve comprising a main valve body, a main valve hole and a shuttle valve groove being arranged in the main valve body, a main valve sleeve being arranged in the main valve hole, a main valve core being arranged in the main valve sleeve, a reset mechanism I and a control cavity being arranged at both ends of the main valve sleeve through left and right end covers, oil source holes P1, return oil holes T1, T2 and oil source holes P2 being arranged on the main valve sleeve, a partition ring being arranged on the main valve core and located between the return oil holes T1 and T2, flow channels I and II being arranged between the main valve hole and the shuttle valve groove, a working oil port P being arranged on the main valve body and communicating with the shuttle valve groove, the main valve core being movable to make the flow channel I communicate with the oil channel hole P1 and the flow channel II communicate with the oil channel hole P2, and a shuttle valve mechanism being arranged in the shuttle valve groove to control the output of the working oil port P and prevent the flow channel I and the flow channel II from channeling oil. The present application solves the problem of mutual oil channeling of the two-position six-way reversing valve when two oil sources are input.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic electromagnetic valves, in particular to a double-oil-source no-oil-leakage two-position six-way reversing valve and a working method thereof. BACKGROUND

[0002] In a traditional hydraulic system, a double-oil-source two-position six-way reversing valve is generally used to realize switching between high pressure and low pressure or switching between two independent execution structures, but the two oil sources cannot be simultaneously connected to high pressure, a certain pressure difference is required to realize the switching between high pressure and low pressure, and an independent load port is required to be used for switching.

[0003] At the same time, the traditional double-oil-source two-position six-way reversing valve is generally integrated by two single-oil-source two-position three-way valves through a spool structure, if the two oil sources are forcibly connected, the two oil sources will have a risk of mutual oil leakage in the reversing valve, which will affect the normal output of the reversing valve. SUMMARY

[0004] In view of the deficiencies in the above background art, the present application provides a double-oil-source no-oil-leakage two-position six-way reversing valve and a working method thereof, which solves the problem of mutual oil leakage of the two-position six-way reversing valve in the prior art when the two oil sources are connected.

[0005] The technical scheme of the present application is as follows:

[0006] A double-oil-source no-oil-leakage two-position six-way reversing valve, comprising a main valve body, a main valve hole and a shuttle valve groove are arranged in the main valve body, a main valve sleeve is arranged in the main valve hole, a main valve core is arranged in the main valve sleeve, left and right end covers are arranged at the two ends of the main valve sleeve, a reset mechanism I is arranged between the left end cover and the main valve core, a control cavity is arranged between the right end cover and the main valve core, oil source holes P1, return oil holes T1, return oil holes T2 and oil source holes P2 are arranged on the main valve sleeve, the return oil holes T1 and the return oil holes T2 are located between the oil source holes P1 and the oil source holes P2, a partition ring for preventing mutual oil leakage between the return oil holes T1 and the return oil holes T2 is arranged on the main valve core, and the partition ring is located between the return oil holes T1 and the return oil holes T2.

[0007] Flow channels I and II are arranged between the main valve hole and the shuttle valve groove, the main valve core can be moved to connect the flow channel I with the oil channel hole P1 or to connect the flow channel II with the oil channel hole P2, a working oil port P is arranged on the main valve body and communicates with the shuttle valve groove, and a shuttle valve mechanism is arranged in the shuttle valve groove and is used for controlling the output of the working oil port P and preventing mutual oil leakage of the flow channel I and the flow channel II.

[0008] Further, the main valve sleeve is provided with intermediate oil passage holes P1', P2' and a low-pressure working oil port T, the intermediate oil passage hole P1' is located between the oil source hole P1 and the oil return hole T1 and communicates with the flow channel I, the intermediate oil passage hole P2' is located between the oil source hole P2 and the oil return hole T2 and communicates with the flow channel II, and the low-pressure working oil port T is located between the oil return hole T1 and the oil return hole T2.

[0009] The main valve core is sequentially provided with a first oil source ring groove, a first oil return ring groove, a second oil return ring groove, a second oil source ring groove and a control ring groove along the axial direction thereof, the control ring groove is located at the end of the main valve core away from the left end cover, the control cavity is a cavity formed between the control ring groove, the right end cover and the main valve sleeve, the main valve sleeve is provided with a dark flow channel communicating with the control cavity, the dark flow channel communicates with an external high-pressure oil source, and the main valve body is provided with an electromagnetic valve for controlling the opening and closing of the dark flow channel.

[0010] Further, the reset mechanism I includes a main spring seat, a main spring and a support seat, the main spring seat is hollow, the main spring seat is arranged on the left end cover, the main spring is sleeved on the main spring seat, one end of the main spring away from the left end cover extends out of the main spring seat and is connected with the support seat, the support seat is hollow, one end of the support seat away from the main spring is in contact with the main valve core, the main spring seat, the main spring and the support seat are coaxially arranged with the main valve core, the main valve core is provided with an axial pressure relief hole, one end of the axial pressure relief hole communicates with the inner hole of the support seat, and the other end of the axial pressure relief hole communicates with the first oil return ring groove.

[0011] Further, the shuttle valve mechanism includes a shuttle valve sleeve I, a shuttle valve sleeve II, a shuttle valve core, a sealing steel ball and a reset mechanism II, the shuttle valve sleeve I and the shuttle valve sleeve II are coaxial and communicate with each other, the shuttle valve sleeve I is arranged in the shuttle valve groove through a threaded plug, the shuttle valve sleeve II is arranged at the end of the shuttle valve sleeve I away from the threaded plug and is connected with the groove bottom of the shuttle valve groove, the shuttle valve sleeve I is provided with a through hole I communicating with the flow channel I, the shuttle valve sleeve II is provided with a through hole II communicating with the flow channel II, a through hole III and a through hole IV communicating with the working oil port P, the through hole III and the through hole IV are located between the through hole I and the through hole II, the shuttle valve core is arranged in the shuttle valve sleeve II, one end of the shuttle valve core is provided with a valve core inner groove, the other end of the shuttle valve core is provided with a sealing plug, the sealing steel ball is arranged in the valve core inner groove and is connected with the reset mechanism II, and the sealing plug seals the inner hole of the shuttle valve sleeve II.

[0012] Further, the inner hole of the shuttle valve sleeve II is a T-shaped hole, the T-shaped hole includes a wide hole and a narrow hole, the wide hole faces the shuttle valve sleeve I, the narrow hole is located at the end of the wide hole away from the shuttle valve sleeve I, the through hole III and the through hole IV are located on the side wall of the wide hole, the through hole II is located on the side wall of the narrow hole, the shuttle valve core is located in the wide hole and seals the through hole IV, and the sealing plug of the shuttle valve core abuts against the narrow hole and seals the port of the narrow hole facing the wide hole.

[0013] Further, the reset mechanism II includes a shuttle valve spring seat, a shuttle valve spring and a guide cylinder, an inner groove is formed in one end of the threaded plug towards the shuttle valve sleeve I, the shuttle valve spring seat is installed in the inner groove and extends into the inner hole of the shuttle valve sleeve I, the shuttle valve spring seat is hollow, the shuttle valve spring is sleeved on the shuttle valve spring seat, one end of the shuttle valve spring away from the groove bottom of the threaded plug passes through the shuttle valve sleeve I and extends into the shuttle valve sleeve II, the guide cylinder is sleeved on the shuttle valve spring, and the cylinder bottom of the guide cylinder abuts against one end of the shuttle valve spring away from the threaded plug, flow holes are formed in the cylinder wall and the cylinder bottom of the guide cylinder, and one end of the sealing steel ball away from the groove bottom of the shuttle valve core abuts against the outer cylinder bottom of the guide cylinder.

[0014] Further, the partition ring is a gasket ring, and sealing rings are arranged between the left end cover and the main valve hole, between the right end cover and the main valve hole, between the main valve sleeve and the main valve hole, between the threaded plug and the shuttle valve groove, between the shuttle valve sleeve I and the shuttle valve groove, and between the shuttle valve sleeve II and the shuttle valve groove.

[0015] A working method of a two-position six-way reversing valve without oil channeling, including two working states of de-energization of the electromagnetic valve and energization of the electromagnetic valve, after de-energization of the electromagnetic valve, the dark flow channel is cut off, the control cavity is in a low-pressure state, the main valve core contacts the right end cover under the action of the reset mechanism I, the first oil source ring groove is communicated with the oil source hole P and the intermediate oil passage hole P' to be in a high-pressure state, the first oil return ring groove is communicated with the oil return hole T and the low-pressure working oil port T to be in a low-pressure state, the second oil return ring groove is communicated with the oil return hole T and the intermediate oil passage hole P' to be in a low-pressure state, the oil source hole P is communicated with the second oil source ring groove and is cut off with the intermediate oil passage hole P', the flow channel I communicated with the intermediate oil passage hole P' is in a high-pressure state, the flow channel II communicated with the intermediate oil passage hole P' is in a low-pressure state, high-pressure oil flowing into the oil source hole P enters the shuttle valve sleeve I through the flow channel I, the high-pressure oil passes through the flow holes on the guide cylinder, enters the shuttle valve sleeve II and flows out from the working oil port P through the through hole III, and the sealing plug seals the port on the side corresponding to the shuttle valve sleeve II.

[0016] After the electromagnetic valve is energized, the dark flow channel communicates the control cavity and the external high-pressure oil source, the control cavity is in high-pressure state, the main valve core is close to the left end cover under the action of the control cavity and compresses the main spring, the first oil source ring groove communicates with the oil source hole P and is cut off with the intermediate oil channel hole P', the first return oil ring groove communicates with the intermediate oil channel hole P' and the return oil hole T and is in low-pressure state, the second return oil ring groove communicates with the low-pressure working oil port T and the return oil hole T and is in low-pressure state, the second oil source ring groove communicates with the intermediate oil channel hole P' and the oil source hole P and is in high-pressure state, the flow channel I communicating with the intermediate oil channel hole P' is in low-pressure state, the flow channel II communicating with the intermediate oil channel hole P' is in high-pressure state, the high-pressure oil entering the oil source hole P passes through the flow channel II into the shuttle valve sleeve II, the high-pressure oil pushes the shuttle valve core to move axially, the moved shuttle valve core seals the through hole III and unseals the through hole IV, the shuttle valve core compresses the shuttle valve spring until the sealing steel ball abuts against the port of the shuttle valve sleeve I facing the shuttle valve sleeve II, the high-pressure oil entering the shuttle valve sleeve II passes through the through hole IV on the side wall of the shuttle valve sleeve II and flows out from the working oil port P, and the sealing steel ball seals the port on the corresponding side of the shuttle valve sleeve I.

[0017] The beneficial effects of the present application are:

[0018] 1. The high and low pressure changes in the control cavity can control the movement of the main valve core in the main valve sleeve, the partition ring can separate the return oil ends of the two oil sources, i.e. the return oil holes T1 and T2, entering the oil source holes P1 and P2 respectively, prevent oil channeling between the return oil holes T1 and T2, and the shuttle valve mechanism can control the output of the working oil port P and prevent oil channeling of the oil sources entering the shuttle valve groove from the flow channels I and II respectively.

[0019] 2. The external high-pressure oil source connected by the dark flow channel can provide power for the movement of the main valve core in the main valve sleeve, thereby controlling the communication or cut-off between each hole position on the main valve sleeve and each ring groove on the main valve core, ensuring the normal operation of the present application.

[0020] 3. The main spring supports the main valve core through the support seat to prevent the main valve core from sliding randomly in the main valve sleeve, and the axial pressure relief hole can balance the pressure between the main spring seat and the first oil source ring groove, ensuring that the main valve core can normally compress the main spring in the main valve sleeve, ensuring the normal work of the main valve core.

[0021] 4. When the solenoid valve is not energized, the sealing plug on the shuttle valve core can block the inner hole of the shuttle valve sleeve, preventing oil from flow channel II into the working port P, and ensuring that oil from flow channel I can flow smoothly out of the working port P. When the solenoid valve is energized, the sealing steel ball in the inner groove of the shuttle valve core can block the port of shuttle valve sleeve I, preventing oil from flow channel I from flowing out of the working port P, while also ensuring that oil from flow channel II can pass through the through hole IV and flow out of the working port P. The sealing plug and sealing steel ball on the shuttle valve core isolate the two oil sources in flow channel I and flow channel II, preventing oil from flowing between the two oil sources and ensuring that the working port P can always output only one type of oil source.

[0022] 5. By controlling the on and off of the solenoid valve, the high and low pressure in the control chamber can be controlled, thereby controlling the high and low pressure in flow channel I and flow channel II, and thus realizing the output switching of working oil port P, thereby realizing the reversing switching function of the present invention.

[0023] 7. The sealing ring can seal the gaps between the main valve sleeve and the main valve hole, between the shuttle valve sleeve I and the shuttle valve groove, and between the shuttle valve sleeve II and the shuttle valve groove, ensuring the sealing performance of the present invention and preventing oil leakage between the two oil sources.

[0024] 8. The Glad ring has the advantages of low friction, no creep, low starting force, and high pressure resistance. When it is matched with the inner hole of the main valve sleeve, it can completely isolate the oil return hole T1 and oil return hole T2, and prevent oil from flowing between the oil return hole T1 and oil return hole T2. Attached Figure Description

[0025] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic cross-sectional view of the electromagnetic valve of the present invention when it is not energized;

[0027] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0028] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the solenoid valve of the present invention after it is energized;

[0029] Figure 4 for Figure 3 Enlarged schematic diagram of part B.

[0030] In the figure, 1, main valve body; 11, main valve hole; 12, shuttle valve groove; 111, left end cover; 112, right end cover; 2, main valve sleeve; 3, main valve core; 4, reset mechanism I; 5, control cavity; 41, main spring seat; 42, main spring; 43, support seat; 6, partition ring; 13, flow passage I; 14, flow passage II; 31, first oil source ring groove; 32, first oil return ring groove; 33, second oil return ring groove; 34, second oil source ring groove; 35, control ring groove; 36, axial pressure relief hole; 7, shuttle valve mechanism; 71, shuttle valve sleeve I; 72, shuttle valve sleeve II; 73, shuttle valve core; 74, sealing steel ball; 8, reset mechanism II; 711, threaded plug; 731, valve core inner groove; 732, sealing plug; 81, shuttle valve spring seat; 82, shuttle valve spring; 83, guide cylinder; 91, through hole I; 92, through hole II; 93, through hole III; 94, through hole IV; 95, flow hole; 10, electromagnetic valve. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment 1

[0033] Reference Figures 1-4 A two-position six-way reversing valve with double oil sources and no oil channeling, comprising a main valve body 1, the main valve body 1 is provided with a main valve hole 11 and a shuttle valve groove 12, the shuttle valve groove 12 is located above the main valve hole 11, and the two are axially parallel.

[0034] The main valve hole 11 is provided with a main valve sleeve 2, the main valve sleeve 2 is provided with a main valve core 3, and the two ends of the main valve sleeve 2 are respectively provided with a left end cover 111 and a right end cover 112, which are used to close the two end ports of the main valve sleeve 2.

[0035] The left end cover 111 and the main valve core 3 are provided with a reset mechanism I 4, and the right end cover 112 and the main valve core 3 are provided with a control cavity 5. The reset mechanism I 4 comprises a main spring seat 41, a main spring 42 and a support seat 43. The left end cover 111 is an end cover provided with an inner groove, the main spring seat 41 is provided in a hollow manner, the main spring seat 41 is installed in the inner groove of the left end cover 111, and the main spring 42 is sleeved on the main spring seat 41. The end of the main spring 42 away from the groove bottom of the inner groove of the left end cover 111 protrudes out of the main spring seat 41 and is connected with the support seat 43. The support seat 43 is provided in a hollow manner, and the end of the support seat 43 away from the main spring 42 is in contact with and abuts against the main valve core 3. The main spring seat 41, the main spring 42 and the support seat 43 are coaxially arranged with the main valve core 3.

[0036] The main valve sleeve 2 is provided with an oil source hole P1, an oil return hole T1, an oil return hole T2 and an oil source hole P2. The oil return hole T1 and the oil return hole T2 are located between the oil source hole P1 and the oil source hole P2. The main valve core 3 is provided with a partition ring 6 for preventing oil from flowing between the oil return hole T1 and the oil return hole T2, and the partition ring 6 is located between the oil return hole T1 and the oil return hole T2.

[0037] The main valve hole 11 and the shuttle valve groove 12 are provided with a flow channel I 13 and a flow channel II 14, and the main valve core 3 can make the flow channel I 13 communicate with the oil passage hole P1 and the flow channel II 14 communicate with the oil passage hole P2. The main valve body 1 is provided with a working oil port P which communicates with the shuttle valve groove 12, and the shuttle valve groove 12 is provided with a shuttle valve mechanism 7 for controlling the output of the working oil port P and preventing the flow channel I 13 and the flow channel II 14 from communicating with each other.

[0038] The main valve sleeve 2 is provided with an intermediate oil passage hole P1', an intermediate oil passage hole P2' and a low-pressure working oil port T. The intermediate oil passage hole P1' is located between the oil source hole P1 and the oil return hole T1 and communicates with the flow channel I 13. The intermediate oil passage hole P2' is located between the oil source hole P2 and the oil return hole T2 and communicates with the flow channel II 14. The low-pressure working oil port T is located between the oil return hole T1 and the oil return hole T2.

[0039] The main valve body 1 and the main valve sleeve 2 are provided with corresponding dark holes (not shown in the figure) corresponding to the oil source hole P1, the oil return hole T1, the oil return hole T2, the oil source hole P2, the intermediate oil passage hole P1', the intermediate oil passage hole P2' and the low-pressure working oil port T, which facilitate the communication between the openings on the main valve sleeve 2 and the outside.

[0040] The main valve core 3 is provided with a first oil source ring groove 31, a first oil return ring groove 32, a second oil return ring groove 33, a second oil source ring groove 34 and a control ring groove 35 in sequence along the axial direction. The control ring groove 35 is located at one end of the main valve core 3 away from the left end cover 111, and the control cavity 5 is the cavity formed between the control ring groove 35, the right end cover 112 and the main valve sleeve 2. The main valve sleeve 2 is provided with a dark flow channel (not shown in the figure) which communicates with the control cavity 5 and communicates with the external high-pressure oil source. The main valve body 1 is provided with an electromagnetic valve 10 for controlling the opening and closing of the dark flow channel.

[0041] The main valve core 3 is provided with an axial relief hole 36, which is located at one end of the main valve core 3 close to the left end cover 111, one end of the axial relief hole 36 communicates with the inner hole of the support seat 43, and the other end communicates with the first oil return ring groove 32. The axial relief hole 36 can balance the pressure between the main spring seat 41 and the first oil source ring groove 31, ensure that the main valve core 3 can normally compress the main spring 42 in the main valve sleeve 2, and ensure the normal work of the main valve core 3.

[0042] The shuttle valve mechanism 7 comprises a shuttle valve sleeve I 71, a shuttle valve sleeve II 72, a shuttle valve spool 73, a sealing ball 74 and a reset mechanism II 8. The shuttle valve sleeve I 71 and the shuttle valve sleeve II 72 are coaxially communicated, the shuttle valve sleeve I 71 is arranged in the shuttle valve groove 12 through a threaded plug 711, the threaded plug 711 is inserted at the slot of the shuttle valve groove 12, and the shuttle valve sleeve I 71 is installed at the end of the threaded plug 711 extending into the slot of the shuttle valve groove 12. The threaded plug 711 is a plug provided with an inner groove, the inner groove of the threaded plug 711 is communicated with the inner hole of the shuttle valve sleeve I 71. The shuttle valve sleeve II 72 is inserted into the shuttle valve groove 12 and abuts against the groove bottom of the shuttle valve groove 12, and the end of the shuttle valve sleeve II 72 away from the groove bottom of the shuttle valve groove 12 is connected with the end of the shuttle valve sleeve I 71 away from the threaded plug 711.

[0043] The shuttle valve sleeve I 71 is provided with a through hole I 91 communicated with the flow passage I 13, the shuttle valve sleeve II 72 is provided with a through hole II 92 communicated with the flow passage II 14, a through hole III 93 and a through hole IV 94 communicated with the working oil port P, and the through hole III 93 and the through hole IV 94 are located between the through hole I 91 and the through hole II 92.

[0044] The shuttle valve spool 73 is arranged in the shuttle valve sleeve II 72, one end of the shuttle valve spool 73 is provided with a spool inner groove 731, and the other end is provided with a sealing plug 732. The inner hole of the shuttle valve sleeve II 72 is a T-shaped hole, which comprises a wide hole and a narrow hole, the wide hole faces the shuttle valve sleeve I 71, and the narrow hole is located at the end of the wide hole away from the shuttle valve sleeve I 71. The through hole III 93 and the through hole IV 94 are both located on the side wall of the wide hole, and the through hole II 92 is located on the side wall of the narrow hole. The shuttle valve spool 73 is located in the wide hole, and the outer side wall of the shuttle valve spool 73 abuts against the inner wall of the wide hole, the shuttle valve spool 73 seals the through hole IV 94. The sealing ball 74 is installed in the spool inner groove 731, and the end of the sealing ball 74 away from the groove bottom of the spool inner groove 731 extends out of the slot of the spool inner groove 731 and is connected with the reset mechanism II 8. The sealing plug 732 of the shuttle valve spool 73 abuts against the narrow hole and seals the port of the narrow hole facing the wide hole.

[0045] The reset mechanism II 8 comprises a shuttle valve spring seat 81, a shuttle valve spring 82 and a guide cylinder 83 arranged coaxially. The end of the threaded plug 711 facing the shuttle valve sleeve I 71 is provided with an inner groove, the shuttle valve spring seat 81 is installed in the inner groove of the threaded plug 711 and extends into the inner hole of the shuttle valve sleeve I 71. The shuttle valve spring seat 81 is hollow, the shuttle valve spring 82 is sleeved on the shuttle valve spring seat 81, and the end of the shuttle valve spring 82 away from the groove bottom of the inner groove of the threaded plug 711 penetrates through the shuttle valve sleeve I 71 and extends into the shuttle valve sleeve II 72. The guide cylinder 83 is sleeved on the shuttle valve spring 82, and the cylinder bottom of the guide cylinder 83 abuts against the end of the shuttle valve spring 82 away from the threaded plug 711. The cylinder wall and the cylinder bottom of the guide cylinder 83 are both provided with flow holes 95, and the end of the sealing ball 74 away from the groove bottom of the shuttle valve spool 73 abuts against the outer side cylinder bottom of the guide cylinder 83.

[0046] In the embodiment, sealing rings are arranged between the left end cover 111 and the main valve hole 11, between the right end cover 112 and the main valve hole 11, between the main valve sleeve 2 and the main valve hole 11, between the threaded plug 711 and the shuttle valve groove 12, between the shuttle valve sleeve I 71 and the shuttle valve groove 12, and between the shuttle valve sleeve II 72 and the shuttle valve groove 12.

[0047] Eight sealing rings are arranged between the main valve sleeve 2 and the main valve hole 11, and are respectively arranged between the oil source hole P1 and the left end cover 111, between the oil source hole P1 and the intermediate oil passage hole P1', between the intermediate oil passage hole P1' and the oil return hole T1, between the oil return hole T1 and the low-pressure working oil port T, between the low-pressure working oil port T and the oil return hole T2, between the oil return hole T2 and the intermediate oil passage hole P2', between the intermediate oil passage hole P2' and the oil source hole P2, and between the oil source hole P2 and the right end cover 112.

[0048] The sealing ring between the shuttle valve sleeve I 71 and the shuttle valve groove 12 is arranged between the flow channel I 13 and the working oil port P, and the sealing ring between the shuttle valve sleeve II 72 and the shuttle valve groove 12 is arranged between the flow channel II 14 and the working oil port P. The sealing rings can seal the gaps between the main valve sleeve 2 and the main valve hole 11, between the shuttle valve sleeve I 71 and the shuttle valve groove 12, and between the shuttle valve sleeve II 72 and the shuttle valve groove 12, ensure the sealing property of the invention, and avoid the oil channeling between the two oil sources in the main valve hole 11 and the shuttle valve groove 12. The sealing rings on the left end cover 111 and the right end cover 112 can prevent oil leakage from the end of the invention.

[0049] In addition, the matching process between the main valve core 3 and the inner hole side wall of the main valve sleeve 2, the matching process between the support seat 43 and the inner hole side wall of the main valve sleeve 2, the matching process between the shuttle valve core 73 and the wide hole wall of the shuttle valve sleeve II 72, and the matching process between the guide cylinder 83 and the inner hole wall of the shuttle valve sleeve I 71 are all matching grinding processes. The matching grinding process can make the main valve core 3, the support seat 43 and the inner hole of the main valve sleeve 2 fit more closely, can make the outer side wall of the shuttle valve core 73 and the wide hole wall of the shuttle valve sleeve II 72 fit more closely, and can make the outer cylinder wall of the guide cylinder 83 and the inner hole wall of the shuttle valve sleeve I 71 fit more closely, further reducing the possibility of oil channeling between the two oil sources.

[0050] In the embodiment, the partition ring 6 is a Glay ring, which has the advantages of low friction, no crawling, small starting force, and high pressure resistance. The cooperation between the Glay ring and the inner hole of the main valve sleeve can completely isolate the oil return holes T1 and T2, preventing oil channeling between the two oil return holes.

[0051] Embodiment 2:

[0052] The working method of the two-position six-way reversing valve with double oil sources and without oil channeling includes two working states of the de-energization of the electromagnetic valve 10 and the energization of the electromagnetic valve 10.

[0053] In the embodiment, the worker can control the high and low pressure in the control cavity 5 by controlling the on-off electricity of the electromagnetic valve 10, and then can control the movement of the main valve core 3 in the main valve sleeve 2, and then can control the high and low pressure in the flow channel I 13 and the flow channel II 14, and then can realize the output switching of the working oil port P, and can realize the reversing switching function of the application.

[0054] When the electromagnetic valve 10 is powered off, that is, in the initial state, the dark flow channel is cut off, the control cavity 5 is in a low pressure state, the main valve core 3 contacts the right end cover 112 under the action of the reset mechanism I 4, the first oil source ring groove 31 is communicated with the oil source hole P1 and the intermediate oil passage hole P1', the first return oil ring groove 32 is communicated with the return oil hole T1 and the low pressure working oil port T, the second return oil ring groove 33 is communicated with the return oil hole T2 and the intermediate oil passage hole P2', the oil source hole P2 is communicated with the second oil source ring groove 34 and is cut off with the intermediate oil passage hole;

[0055] When the electromagnetic valve 10 is powered off, the cutoff ring 6 is located between the return oil hole T2 and the low pressure working oil port T, the cutoff ring 6 can avoid the communication between the return oil hole T2 and the low pressure working oil port T, and then avoid the communication between the return oil hole T1 and the return oil hole T2, and prevent the oil channeling between the high pressure oil source in the main valve sleeve 2 from the oil source hole P1 and the high pressure oil source in the main valve sleeve 2 from the oil source hole P2;

[0056] At the same time, the flow channel I 13 communicated with the intermediate oil passage hole P1' is in a high pressure state, the flow channel II 14 communicated with the intermediate oil passage hole P2' is in a low pressure state, the high pressure oil flowing into the oil source hole P1 enters the shuttle valve sleeve I 71 through the flow channel I 13, the high pressure oil passes through the flow hole 95 on the guide cylinder 83 into the shuttle valve sleeve II 72 and flows out from the working oil port P through the through hole III 93, the high pressure oil flowing into the shuttle valve sleeve II 72 can push the shuttle valve core 73 and make the sealing plug 732 at the end of the shuttle valve core 73 abut against the port of the narrow width hole of the shuttle valve sleeve, under the double action of the reset mechanism I 4 and the high pressure oil, the sealing plug 732 can seal the narrow width hole more tightly, prevent the high pressure oil flowing from the working oil port P1 from entering the flow channel II 14, and avoid the oil channeling of the two oil sources in the shuttle valve groove 12.

[0057] After the electromagnetic valve 10 is powered on, the dark flow channel communicates the control cavity 5 and the external high pressure oil source, the control cavity 5 is in a high pressure state, the main valve core 3 approaches the left end cover 111 under the action of the control cavity 5 and compresses the main spring 42, the first oil source ring groove 31 is communicated with the oil source hole P1 and is cut off with the intermediate oil passage hole P1', the first return oil ring groove 32 is communicated with the intermediate oil passage hole P1' and the return oil hole T1, the intermediate oil passage hole P1' is in a low pressure state, the second return oil ring groove 33 is communicated with the low pressure working oil port T and the return oil hole T2, the second oil source ring groove 34 is communicated with the intermediate oil passage hole P2' and the oil source hole P2, the intermediate oil passage hole P2 is in a high pressure state;

[0058] When the electromagnetic valve 10 is energized, the partition ring 6 is located between the oil return hole T1 and the low pressure working oil port T, the partition ring 6 can avoid the communication between the oil return hole T1 and the low pressure working oil port T, and further avoid the communication between the oil return hole T1 and the oil return hole T2, and prevent the oil channeling between the high pressure oil source from the oil source hole P1 and the high pressure oil source from the oil source hole P2;

[0059] Meanwhile, the flow channel I 13 communicating with the intermediate oil passage hole P1' is in low pressure state, and the flow channel II 14 communicating with the intermediate oil passage hole P2' is in high pressure state, the high pressure oil from the oil source hole P2 enters the shuttle valve sleeve II 72 through the flow channel II 14, the shuttle valve core 73 is axially moved by the high pressure oil, the moved shuttle valve core 73 seals the through hole III 93 and unseals the through hole IV 94, the shuttle valve core 73 compresses the shuttle valve spring 82 until the sealing steel ball 74 abuts against the port of the shuttle valve sleeve I 71 towards the shuttle valve sleeve II 72, the high pressure oil from the oil source hole P2 entering the main valve sleeve 2 enters the shuttle valve sleeve II 72, passes through the through hole IV 94 on the side wall of the shuttle valve sleeve II 72 and flows out from the working oil port P, the sealing steel ball 74 on the shuttle valve core 73 can seal the port of the shuttle valve sleeve I 71 towards the shuttle valve sleeve II 72, and can cut off the high pressure oil flowing into the shuttle valve sleeve II 72, prevent the high pressure oil from the working oil port P2 from entering the flow channel I 13, and avoid the oil channeling of the two oil sources in the shuttle valve groove 12.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dual-oil-source, non-cross-flow two-position six-way directional valve, comprising a main valve body (1), characterized in that: The main valve body (1) is provided with a main valve hole (11) and a shuttle valve groove (12). The main valve hole (11) is provided with a main valve sleeve (2). The main valve sleeve (2) is provided with a main valve core (3). The two ends of the main valve sleeve (2) are respectively provided with a left end cover (111) and a right end cover (112). A reset mechanism I (4) is provided between the left end cover (111) and the main valve core (3). A control chamber (5) is provided between the right end cover (112) and the main valve core (3). The main valve sleeve (2) is provided with an oil source hole P1, an oil return hole T1, an oil return hole T2 and an oil source hole P2. The oil return hole T1 and the oil return hole T2 are both located between the oil source hole P1 and the oil source hole P2. The main valve core (3) is provided with a partition ring (6) to prevent oil leakage between the oil return hole T1 and the oil return hole T2. The partition ring (6) is located between the oil return hole T1 and the oil return hole T2. A flow channel I (13) and a flow channel II (14) are provided between the main valve hole (11) and the shuttle valve groove (12). The main valve core (3) can move to make the flow channel I (13) communicate with the oil passage hole P1 or make the flow channel II (14) communicate with the oil passage hole P2. A working oil port P that communicates with the shuttle valve groove (12) is provided on the main valve body (1). A shuttle valve mechanism (7) is provided in the shuttle valve groove (12) to control the output of the working oil port P and to prevent the flow channel I (13) and the flow channel II (14) from interfering with each other. The main valve sleeve (2) is provided with an intermediate oil passage hole P1', an intermediate oil passage hole P2' and a low-pressure working oil port T. The intermediate oil passage hole P1' is located between the oil source hole P1 and the return oil hole T1 and is connected to the flow channel I (13). The intermediate oil passage hole P2' is located between the oil source hole P2 and the return oil hole T2 and is connected to the flow channel II (14). The low-pressure working oil port T is located between the return oil hole T1 and the return oil hole T2. The main valve core (3) is provided with a first oil source ring groove (31), a first return oil ring groove (32), a second return oil ring groove (33), a second oil source ring groove (34), and a control ring groove (35) in sequence along its axial direction. The control ring groove (35) is located at the end of the main valve core (3) away from the left end cover (111). The main valve sleeve (2) is provided with a hidden flow channel that communicates with the control ring groove (35). The hidden flow channel is connected to an external high-pressure oil source. The main valve body (1) is provided with a solenoid valve (10) for controlling the opening and closing of the hidden flow channel. The shuttle valve mechanism (7) includes a shuttle valve sleeve I (71), a shuttle valve sleeve II (72), a shuttle valve core (73), a sealing steel ball (74), and a reset mechanism II (8). The shuttle valve sleeve I (71) and the shuttle valve sleeve II (72) are coaxial and connected. The shuttle valve sleeve I (71) is set in the shuttle valve groove (12) through a threaded plug (711). The shuttle valve sleeve II (72) is set at the end of the shuttle valve sleeve I (71) away from the threaded plug (711) and connected to the bottom of the shuttle valve groove (12). The shuttle valve sleeve I (71) has a through hole I (91) that communicates with the flow channel I (13). The shuttle valve sleeve II (72) has a through hole I (91) that communicates with the flow channel I (13). The system is provided with a through hole II (92) communicating with the flow channel II (14) and through holes III (93) and IV (94) communicating with the working oil port P. Through holes III (93) and IV (94) are located between through holes I (91) and through holes II (92). The shuttle valve core (73) is set inside the shuttle valve sleeve II (72). One end of the shuttle valve core (73) is provided with a valve core inner groove (731) and the other end is provided with a sealing plug (732). The sealing steel ball (74) is set in the valve core inner groove (731) and connected to the reset mechanism II (8). The sealing plug (732) seals the inner hole of the shuttle valve sleeve II (72). The inner hole of the shuttle valve sleeve II (72) is a T-shaped hole, which includes a wide hole and a narrow hole. The wide hole faces the shuttle valve sleeve I (71), and the narrow hole is located at the end of the wide hole away from the shuttle valve sleeve I (71). The through hole III (93) and the through hole IV (94) are both located on the side wall of the wide hole. The through hole II (92) is located on the side wall of the narrow hole. The shuttle valve core (73) is located in the wide hole and seals the through hole IV (94). The sealing plug (732) of the shuttle valve core (73) is pressed against the narrow hole and seals the port of the narrow hole facing the wide hole.

2. The dual-oil-source, non-cross-flow two-position six-way directional valve according to claim 1, characterized in that: The reset mechanism I (4) includes a main spring seat (41), a main spring (42), and a support seat (43). The main spring seat (41) is hollow and is mounted on the left end cover (111). The main spring (42) is sleeved on the main spring seat (41). One end of the main spring (42) away from the left end cover (111) extends out of the main spring seat (41) and connects with the support seat (43). The support seat (43) is hollow and one end of the support seat (43) away from the main spring (42) contacts the main valve core (3). The main spring seat (41), the main spring (42), and the support seat (43) are all coaxially mounted with the main valve core (3). The main valve core (3) has an axial pressure relief hole (36). One end of the axial pressure relief hole (36) communicates with the inner hole of the support seat (43), and the other end communicates with the first return oil ring groove (32).

3. The dual-oil-source, non-cross-flow two-position six-way directional valve according to claim 2, characterized in that: The reset mechanism II (8) includes a shuttle valve spring seat (81), a shuttle valve spring (82), and a guide cylinder (83). The threaded plug (711) has an inner groove at one end facing the shuttle valve sleeve I (71). The shuttle valve spring seat (81) is installed in the inner groove and extends into the inner hole of the shuttle valve sleeve I (71). The shuttle valve spring seat (81) is hollow. The shuttle valve spring (82) is sleeved on the shuttle valve spring seat (81). The shuttle valve spring (82) is away from the threaded plug (71). 1) One end of the bottom of the inner groove passes through the shuttle valve sleeve I (71) and extends into the shuttle valve sleeve II (72). The guide cylinder (83) is sleeved on the shuttle valve spring (82), and the bottom of the guide cylinder (83) abuts against the end of the shuttle valve spring (82) away from the threaded plug (711). The guide cylinder (83) has flow holes (95) on both the cylinder wall and the bottom. The end of the sealing steel ball (74) away from the bottom of the inner groove (731) of the valve core abuts against the bottom of the outer cylinder of the guide cylinder (83).

4. A dual-oil-source, non-cross-flow two-position six-way directional valve according to claim 3, characterized in that: The partition ring (6) is a Gladius ring. Sealing rings are provided between the left end cap (111) and the main valve hole (11), between the right end cap (112) and the main valve hole (11), between the main valve sleeve (2) and the main valve hole (11), between the threaded plug (711) and the shuttle valve groove (12), between the shuttle valve sleeve I (71) and the shuttle valve groove (12), and between the shuttle valve sleeve II (72) and the shuttle valve groove (12).

5. A method for operating a dual-oil-source, non-cross-flow two-position six-way directional valve as described in any one of claims 1-4, comprising two operating states: solenoid valve de-energized and solenoid valve energized, characterized in that: After the solenoid valve (10) is de-energized, the dark flow channel is cut off, the control chamber (5) is in a low-pressure state, and the main valve core (3) contacts the right end cover (112) under the action of the reset mechanism I (4). The first oil source ring groove (31) is in a high-pressure state, connected to the oil source hole P1 and the intermediate oil passage hole P1'. The first return oil ring groove (32) is in a low-pressure state, connected to the return oil hole T1 and the low-pressure working oil port T. The second return oil ring groove (33) is in a low-pressure state, connected to the return oil hole T2 and the intermediate oil passage hole P2'. The oil source hole P2 and the second oil source ring groove (33) are in a low-pressure state. 34) The flow channel I (13) connected to the intermediate oil passage hole P2' is closed, and the flow channel II (14) connected to the intermediate oil passage hole P1' is in a high-pressure state. The high-pressure oil entering the oil source hole P1 enters the shuttle valve sleeve I (71) through the flow channel I (13). The high-pressure oil passes through the flow hole (95) on the guide cylinder (83) and enters the shuttle valve sleeve II (72). It then flows out from the working oil port P through the through hole III (93). The sealing plug (732) seals the port on the corresponding side of the shuttle valve sleeve II (72). After the solenoid valve (10) is energized, the dark flow channel connects the control chamber (5) and the external high-pressure oil source. The control chamber (5) is in a high-pressure state. Under the action of the control chamber (5), the main valve core (3) approaches the left end cover (111) and compresses the main spring (42). The first oil source ring groove (31) is connected to the oil source hole P1 and cut off from the middle oil passage hole P1'. The first return oil ring groove (32) is connected to the middle oil passage hole P1' and the return oil hole T1 in a low-pressure state. The second return oil ring groove (33) is connected to the low-pressure working oil port T and the return oil hole T2 in a low-pressure state. The second oil source ring groove (34) is connected to the middle oil passage hole P2' and the oil source hole P2 in a high-pressure state. The flow channel I (13) connected to the middle oil passage hole P1' is in a low-pressure state. The intermediate oil passage hole P2' is connected to the flow channel II (14) under high pressure. The high pressure oil introduced into the oil source hole P2 enters the shuttle valve sleeve II (72) through the flow channel II (14). The high pressure oil pushes the shuttle valve core (73) to move axially. After moving, the shuttle valve core (73) releases the seal on the through hole IV (94) and seals the through hole III (93). The shuttle valve core (73) compresses the shuttle valve spring (82) until the sealing steel ball (74) presses against the port of the shuttle valve sleeve I (71) facing the shuttle valve sleeve II (72). After the high pressure oil enters the shuttle valve sleeve II (72), it passes through the through hole IV (94) on the side wall of the shuttle valve sleeve II (72) and flows out from the working oil port P. The sealing steel ball (74) seals the port on the corresponding side of the shuttle valve sleeve I (71).

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