A mechanical rotary drive oil circuit switching mechanism

Abstract

The present invention belongs to the field of submarine pipeline recovery, and in particular, relates to a mechanical rotary drive oil circuit switching mechanism, wherein the rotary switch is inserted into a valve body, the rotary switch can rotate along its central axis, the gland presses the end of the rotary switch to limit the movement of the rotary switch along the axis, the axis of the rotary switch is perpendicular to the axis of the oil circuit switching one-way valve, the outer periphery of the rotary switch is provided with at least one group of control groove groups consisting of cam grooves and oil grooves, each group of the control groove groups is provided with a sealing groove, a rotary sealing ring is installed in the sealing groove, the cross section of the cam groove is a cam shape, and the end of the valve core of the oil circuit switching one-way valve is against the cam groove. The present invention provides a rotary switch that can simultaneously drive one or more oil circuit switching one-way valves, realizing a mechanical rotary drive oil circuit switching mechanism for rotating and switching hydraulic oil circuits of an underwater robot.

Description

Technical Field

[0001] The invention belongs to the field of submarine pipeline recovery, and in particular relates to a mechanical rotary drive oil circuit switching mechanism. Background Art

[0002] Existing technologies and defects:

[0003] When a submarine pipeline is buckled or damaged by external forces, the submarine pipeline must first be cut off underwater using special equipment, and then recovered to the pipe-laying ship operation line using pipeline recovery equipment for welding repair. After completion, it can be put back on the seabed or the submarine pipeline can be re-laid. The internal expansion self-locking pipeline recovery tool is increasingly being used worldwide because of its safety, efficiency, and convenience.

[0004] The control system of the submarine pipeline recovery tool is divided into internal control and external control modes. The external control mode requires the ship to provide hydraulic power; the internal control mode integrates mechanical and hydraulic control on the submarine pipeline recovery tool. During underwater operations, the hot plug valve integrated on the recovery tool is inserted or pulled out by an underwater robot to tighten the recovery tool. Due to the gap between the hot plug valve core and the valve core channel, there is a leakage problem during the switching process, and there is a risk of seawater entering the control system.

[0005] In order to solve the problem that the hydraulic system oil circuit switching cannot use the external control power supply and ensure that there is no leakage before and after the oil circuit switching, the present invention proposes a mechanical rotation-driven hydraulic oil circuit switching mechanism, which is used to be integrated in the submarine pipeline maintenance emergency recovery tool to realize the rotation switching of the hydraulic oil circuit of the underwater robot.

[0006] The difficulty and significance of solving the above technical problems:

[0007] Therefore, based on these problems, it is of great practical significance to provide a rotary switch that can simultaneously drive one or more oil circuit switching one-way valves to realize a mechanical rotation drive oil circuit switching mechanism for rotating and switching the hydraulic oil circuit of an underwater robot. Summary of the invention

[0008] The purpose of the present invention is to solve the technical problems existing in the known technology and provide a rotary switch that can simultaneously drive one or more oil circuit switching one-way valves to realize a mechanical rotation drive oil circuit switching mechanism for rotating and switching the hydraulic oil circuit of an underwater robot.

[0009] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is:

[0010] A mechanical rotary drive oil circuit switching mechanism, the mechanical rotary drive oil circuit switching mechanism comprises: a valve body, an oil circuit switching one-way valve, a rotary switch and a pressure cover, the rotary switch is inserted into the valve body, the rotary switch can rotate along its central axis, the pressure cover presses the end of the rotary switch to limit the movement of the rotary switch along the axis, the axis of the rotary switch is perpendicular to the axis of the oil circuit switching one-way valve, the outer periphery of the rotary switch is provided with at least one group of control groove groups consisting of cam grooves and oil grooves, each group of the control groove groups is provided with a sealing groove, a rotary sealing ring is installed in the sealing groove, the cross-section of the cam groove is cam-shaped, the end of the valve core of the oil circuit switching one-way valve is against the cam groove, when the rotary switch rotates along its central axis, the cam groove can drive the end of the valve core to move, when the valve core moves, the oil circuit switching one-way valve is opened or closed, when the oil circuit switching one-way valve is opened, the flow channel inside the valve body is connected to the oil groove.

[0011] The valve body of the present invention is the main body of the emergency recovery tool working control device. The oil circuit switching one-way valve, the rotary switch, and the pressure cover are integrated on the valve body. The rotary switch can drive one or more oil circuit switching one-way valves at the same time. A rotating sealing ring is installed on the rotary switch to isolate different flow channels. The rotating sealing ring is used to isolate a single oil circuit switching one-way valve from other oil circuit switching one-way valves and the rotary switch from the external oil circuit.

[0012] The present invention connects the various working oil ports of the oil circuit switching mechanism according to functional requirements through the flow channel inside the valve body, and the flow channel inside the valve body connects multiple oil circuit switching check valves and rotary switches to form a drive control oil circuit. The present invention is used to be integrated in the emergency recovery tool for submarine pipeline maintenance to realize the rotation and switching of the hydraulic oil circuit of the underwater robot.

[0013] The present invention can also adopt the following technical solutions:

[0014] In the above-mentioned mechanical rotation driven oil circuit switching mechanism, further, the oil circuit switching one-way valve includes a housing, a valve core, a spring, a baffle, a retaining ring and a sealing ring, the valve core is installed in the housing, the valve core is coaxially arranged with the housing, and can move axially along the housing, the end of the valve core is sealed with the conical surface of the housing, the spring is sleeved on the valve core, one end of the spring abuts against the valve core, and the other end abuts against the baffle, and the baffle has no relative movement with the housing.

[0015] In the above-mentioned mechanical rotary drive oil circuit switching mechanism, further, the valve core is divided into four sections along the axial direction, which are, from outside to inside, a push rod section, a conical sealing section, a guide section and a spring guide section; the end of the push rod section is a spherical surface, which contacts the cam groove surface of the rotary switch, and the valve core push rod section, the guide section and the knob switch cam groove surface together constitute a cam push rod structure, and the outer side of the push rod section is a three-sided groove for oil flow at both ends of the push rod; the conical surface of the conical sealing section forms a conical seal when it contacts the inner circular edge of the inner hole boss of the shell; the guide section is cylindrical, and the outer side of the guide section is gap-matched with the shell, and a plurality of evenly distributed oil flow grooves are machined on the outer side of the guide section along the axial direction.

[0016] A plurality of evenly distributed oil grooves are processed on the outer side of the guide section in the direction of the axis, so that the hydraulic cavities on both sides of the cylinder are connected.

[0017] In the above-mentioned mechanical rotation drive oil circuit switching mechanism, further, the baffle is in the shape of a circular plate with a circular hole in the center, the baffle and the retaining spring are sequentially sleeved on the valve core, the spring guide section is cylindrical, the spring guide section of the valve core passes through the circular hole of the baffle, the retaining spring is clamped in the mounting groove of the shell, and a plurality of circumferentially evenly distributed oil holes are processed on the outer side of the baffle.

[0018] The spring guide section is cylindrical and is used to install the spring that drives the valve core. The spring guide section of the valve core passes through the circular hole of the baffle to position the baffle. An inner hole retaining spring is installed on the inner side of the baffle. The retaining spring is fixed in the installation groove processed in the inner hole of the shell, and the retaining spring limits the inward movement of the baffle.

[0019] In the above-mentioned mechanical rotation drive oil circuit switching mechanism, further, the valve core is a cylindrical rod shape, the shell is a cylindrical cylinder, the outer side of the cylinder is processed with threads, the valve body and the oil circuit switching one-way valve are connected by threads, one end of the cylinder is processed with an installation groove, a sealing ring is sleeved in the installation groove, and the other end of the cylinder is processed with an inner hexagonal hole.

[0020] The hexagonal inner hole is used for inserting a hexagonal wrench into the working hole to tighten the oil circuit switching check valve when installing it.

[0021] The oil circuit switching check valve is inserted into the valve body as a whole, and is used to block and connect the corresponding working oil circuit in the valve body. When the rotary switch rotates a certain angle, the push rod is driven to move to the left according to the cam principle, so that the second conical surface of the valve core is separated from the inner hole boss of the housing, so that the oil circuits at both ends of the oil circuit switching check valve are connected. When the rotary switch rotates in the opposite direction, the valve core is pressed on the sealing table of the housing by the combined action of the spring force and the hydraulic pressure on the left side of the oil circuit switching check valve, isolating the oil circuits inside and outside the housing.

[0022] In the above-mentioned mechanical rotary drive oil circuit switching mechanism, further, the rotary operation knob of the rotary switch is exposed outside the valve body, and the end of the rotary switch is processed into a flat sheet shape.

[0023] The rotary operation knob of the rotary switch is exposed outside the valve body and is used for external robot arm operation control. One end of the rotary switch is processed into a flat piece shape as the manual operation position of the rotary switch. The manipulator of the underwater robot clamps the flat piece and can rotate the switch around the axis.

[0024] In the above-mentioned mechanical rotary drive oil circuit switching mechanism, further, the oil groove is located adjacent to the cam groove, and the oil groove is an annular oil groove.

[0025] The annular oil groove allows the rotary switch to have pressurized oil on the entire annular surface, which can reduce the lateral force of the rotary switch due to the action of the hydraulic pressure, thereby reducing the driving force of the rotary switch operation.

[0026] See the instruction manual Figure 1 And attached Figure 2 In this example, when the rotary switch flat piece is in a vertical state, the spherical surface of the push rod section of the oil circuit switching check valve A is separated from the cam groove A, and the sealing cone surface of the valve core of the oil circuit switching check valve A is pressed on the sealing platform under the combined action of the spring force and the hydraulic pressure, so that the oil circuit switching check valve A is closed. At this time, the P port and the B port are blocked. At the same time, the cam groove B pushes the valve core of the oil circuit switching check valve B to open the oil circuit switching check valve B, and the A port and the T port are connected. When the rotary switch flat piece is in a horizontal state, the cam groove A pushes the valve core of the oil circuit switching check valve A to open the oil circuit switching check valve A, and the P port and the B port are connected. At the same time, the spherical surface of the push rod section of the oil circuit switching check valve B is separated from the cam groove B, and the sealing cone surface of the valve core of the oil circuit switching check valve B is pressed on the sealing platform under the combined action of the spring force and the hydraulic pressure, and the oil circuit switching check valve B is closed, and the A port and the T port are blocked.

[0027] The valve core of the oil circuit switching check valve contacts the cam groove and moves along the trajectory of the cam, thereby pushing the valve core to move and realize the opening and closing of the oil circuit switching check valve. A cam groove and annular oil groove form a control groove group. Seal grooves are set on both sides of each control groove group to isolate the oil circuit. Multiple cam grooves can be processed on the rotary switch to control multiple oil circuit switching check valves. By designing different starting and ending positions of the rotary switch cam groove, the order of opening and closing of multiple oil circuit switching check valves can be conveniently controlled to realize the logical control of oil circuit action. Therefore, the oil circuit switching transition function can be realized. After a single oil circuit is completely closed, another oil circuit can be opened to avoid leakage during the oil circuit switching process.

[0028] In the above-mentioned mechanical rotation drive oil circuit switching mechanism, further, the pressure cover is an annular structure, and a plurality of fixing holes are processed in its circumferential direction, and it is fixed to the valve body by fastening bolts. The pressure cover is coaxially arranged with the rotary switch, and the inner side of the pressure cover contacts the side of the rotary switch to limit the movement of the rotary switch along the axis.

[0029] The flat piece used for manual operation of the rotary switch passes through the inner hole of the pressure cover so that it can be manually operated. At the same time, the pressure cover plays a certain protective role on the flat piece.

[0030] See the instructions for the inner groove of the gland. Fig.11 The gland groove is processed into a 90° ring groove, which limits the rotation of the rotary switch to 90°, that is, the rotary switch can only rotate 90°, and the rotation end position is limited by the inner groove of the gland. When there are multiple oil circuit switching check valves, the maximum rotation angle can be designed according to actual needs.

[0031] In summary, the present invention has the following advantages and positive effects:

[0032] 1. The valve body of the present invention is the main body of the emergency recovery tool working control device. The oil circuit switching one-way valve, the rotary switch, and the pressure cover are integrated on the valve body. The rotary switch can drive one or more oil circuit switching one-way valves at the same time. A rotating sealing ring is installed on the rotary switch to isolate different flow channels. The rotating sealing ring is used to isolate a single oil circuit switching one-way valve from other oil circuit switching one-way valves and the rotary switch from the external oil circuit.

[0033] 2. The present invention connects the various working oil ports of the oil circuit switching mechanism according to functional requirements through the flow channel inside the valve body. The flow channel inside the valve body connects multiple oil circuit switching check valves and rotary switches to form a drive control oil circuit. The present invention is used to be integrated in the emergency recovery tool for submarine pipeline maintenance to realize the rotation and switching of the hydraulic oil circuit of the underwater robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0035] Figure 1 1 is a structural layout diagram of the oil circuit switching mechanism provided in the first embodiment of the present invention (axial cross-sectional view);

[0036] Figure 2 1 is a structural layout diagram (cross-sectional view) of an oil circuit switching mechanism provided in Embodiment 1 of the present invention;

[0037] Figure 3The oil circuit switching check valve structure of the oil circuit switching mechanism provided in the second embodiment of the present invention is composed of;

[0038] Figure 4 Schematic diagram of the oil circuit switching valve core structure of the oil circuit switching mechanism provided in the second embodiment of the present invention;

[0039] Figure 5 This is a front view of the oil circuit switching mechanism switching switch provided in the third embodiment of the present invention;

[0040] Figure 6 This is a three-dimensional diagram of the oil circuit switching mechanism switching switch provided in the third embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the switching switch structure of the oil circuit switching mechanism provided in the third embodiment of the present invention;

[0042] Figure 8 It is included in the instruction manual Figure 7 Sectional view of the middle AA plane;

[0043] Fig. 9 It is included in the instruction manual Figure 7 Middle BB plane section view;

[0044] Fig.10 1 is a schematic diagram of the gland structure of the oil circuit switching mechanism provided in the fourth embodiment of the present invention;

[0045] Fig.11 It is a schematic diagram of the inner groove structure of the gland provided in the fourth embodiment of the present invention.

[0046] In the figure:

[0047] 1. Valve body, 2. Oil circuit switching non-return valve, 21. Oil circuit switching non-return valve A, 22. Oil circuit switching non-return valve B, 3. Rotary switch, 4. Gland, 5. Rotary sealing ring, 6. Valve core, 7. Sealing ring, 8. Housing, 9. Spring, 10. Baffle, 11. Circlip, 12. Push rod section, 13. Conical sealing section, 14. Guide section, 15. Spring guide section, 16. Cam groove A, 17. Oil groove A, 18. Sealing groove A, 19. Cam groove B, 20. Oil groove B, 23. Sealing groove B, 24. Inner groove of gland. DETAILED DESCRIPTION

[0048] The following is combined Figures 1 to 11 The present invention will be described in detail.

[0049] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0050] Embodiment 1:

[0051] A mechanical rotary drive oil circuit switching mechanism, the mechanical rotary drive oil circuit switching mechanism comprises: a valve body 1, an oil circuit switching one-way valve 2, a rotary switch 3 and a pressure cover 4, the rotary switch is inserted into the valve body, the rotary switch can rotate along its central axis, the pressure cover presses the end of the rotary switch to limit the movement of the rotary switch along the axis, the axis of the rotary switch is perpendicular to the axis of the oil circuit switching one-way valve, the outer periphery of the rotary switch is provided with at least one group of control groove groups consisting of cam grooves and oil grooves, each group of the control groove groups is provided with a sealing groove, a rotary sealing ring 5 is installed in the sealing groove, the cross-section of the cam groove is cam-shaped, the end of the valve core 6 of the oil circuit switching one-way valve abuts against the cam groove, when the rotary switch rotates along its central axis, the cam groove can drive the end of the valve core to move, when the valve core moves, the oil circuit switching one-way valve is opened or closed, when the oil circuit switching one-way valve is opened, the flow channel inside the valve body is connected to the oil groove.

[0052] The valve body of the present invention is the main body of the emergency recovery tool working control device. The oil circuit switching one-way valve, the rotary switch, and the pressure cover are integrated on the valve body. The rotary switch can drive one or more oil circuit switching one-way valves at the same time. A rotating sealing ring is installed on the rotary switch to isolate different flow channels. The rotating sealing ring is used to isolate a single oil circuit switching one-way valve from other oil circuit switching one-way valves and the rotary switch from the external oil circuit.

[0053] The present invention connects the various working oil ports of the oil circuit switching mechanism according to functional requirements through the flow channel inside the valve body, and the flow channel inside the valve body connects multiple oil circuit switching check valves and rotary switches to form a drive control oil circuit. The present invention is used to be integrated in the emergency recovery tool for submarine pipeline maintenance to realize the rotation and switching of the hydraulic oil circuit of the underwater robot.

[0054] Embodiment 2:

[0055] Furthermore, it can also be considered in the present invention that the oil circuit switching one-way valve includes a housing 8, a valve core 6, a spring 9, a baffle 10, a retaining ring 11 and a sealing ring 7, the valve core is installed in the housing, the valve core is coaxially arranged with the housing, and can move axially along the housing, the end of the valve core is sealed with the conical surface of the housing, the spring is sleeved on the valve core, one end of the spring abuts against the valve core, and the other end abuts against the baffle, and the baffle has no relative movement with the housing.

[0056] It should be pointed out that the valve core is divided into four sections along the axial direction, which are, from outside to inside, the push rod section 12, the conical sealing section 13, the guide section 14 and the spring guide section 15; the end of the push rod section is a spherical surface, which contacts the cam groove surface of the rotary switch, and the valve core push rod section, the guide section and the knob switch cam groove surface together constitute a cam push rod structure, and the outer side of the push rod section is a three-sided groove for oil flow at both ends of the push rod; the conical surface of the conical sealing section forms a conical seal when in contact with the inner circular edge of the inner hole boss of the shell; the guide section is cylindrical, and the outer side of the guide section is clearance-matched with the shell, and a plurality of evenly distributed oil flow grooves are machined on the outer side of the guide section along the axial direction.

[0057] A plurality of evenly distributed oil grooves are processed on the outer side of the guide section in the direction of the axis, so that the hydraulic cavities on both sides of the cylinder are connected.

[0058] It should be pointed out that the baffle is in the shape of a circular plate with a circular hole in the center. The baffle and the retaining spring are sequentially sleeved on the valve core. The spring guide section is cylindrical. The spring guide section of the valve core passes through the circular hole of the baffle. The retaining spring is clamped in the mounting groove of the shell. A plurality of oil holes evenly distributed around the circumference are processed on the outer side of the baffle.

[0059] The spring guide section is cylindrical and is used to install the spring that drives the valve core. The spring guide section of the valve core passes through the circular hole of the baffle to position the baffle. An inner hole retaining spring is installed on the inner side of the baffle. The retaining spring is fixed in the installation groove processed in the inner hole of the shell, and the retaining spring limits the inward movement of the baffle.

[0060] It should be pointed out that the valve core is a cylindrical rod shape, the shell is a cylindrical cylinder, the outer side of the cylinder is processed with threads, the valve body and the oil circuit switching one-way valve are threadedly connected, one end of the cylinder is processed with a mounting groove, a sealing ring is sleeved in the mounting groove, and the other end of the cylinder is processed with an inner hexagonal hole.

[0061] The hexagonal inner hole is used for inserting a hexagonal wrench into the working hole to tighten the oil circuit switching check valve when installing it.

[0062] The oil circuit switching check valve is inserted into the valve body as a whole, and is used to block and connect the corresponding working oil circuit in the valve body. When the rotary switch rotates a certain angle, the push rod is driven to move to the left according to the cam principle, so that the second conical surface of the valve core is separated from the inner hole boss of the housing, so that the oil circuits at both ends of the oil circuit switching check valve are connected. When the rotary switch rotates in the opposite direction, the valve core is pressed on the sealing table of the housing by the combined action of the spring force and the hydraulic pressure on the left side of the oil circuit switching check valve, isolating the oil circuits inside and outside the housing.

[0063] Embodiment three:

[0064] The rotary operation knob of the rotary switch is exposed outside the valve body, and the end of the rotary switch is processed into a flat sheet shape.

[0065] The rotary operation knob of the rotary switch is exposed outside the valve body and is used for external robot arm operation control. One end of the rotary switch is processed into a flat piece shape as the manual operation position of the rotary switch. The manipulator of the underwater robot clamps the flat piece and can rotate the switch around the axis.

[0066] It should be noted that the oil groove is located adjacent to the cam groove and is an annular oil groove. The annular oil groove allows the rotary switch to have pressurized oil on the entire annular surface, which can reduce the lateral force of the rotary switch under the action of the hydraulic pressure, thereby reducing the driving force of the rotary switch operation.

[0067] In this embodiment, there are two control slot groups, as shown in the attached manual. Figure 7 Shown are a cam groove A16, an oil groove A17, a seal groove A18, a cam groove B19, an oil groove B20 and a seal groove B23.

[0068] See the instruction manual Figure 1 And attached Figure 2 In this example, when the rotary switch flat piece is in a vertical state, the spherical surface of the push rod section of the oil circuit switching check valve A21 is separated from the cam groove A, and the sealing cone surface of the valve core of the oil circuit switching check valve A is pressed on the sealing platform under the combined action of the spring force and the hydraulic pressure, so that the oil circuit switching check valve A is closed. At this time, the P port and the B port are blocked. At the same time, the cam groove B pushes the valve core of the oil circuit switching check valve B22 to open the oil circuit switching check valve B, and the A port and the T port are connected. When the rotary switch flat piece is in a horizontal state, the cam groove A pushes the valve core of the oil circuit switching check valve A to open the oil circuit switching check valve A, and the P port and the B port are connected. At the same time, the spherical surface of the push rod section of the oil circuit switching check valve B is separated from the cam groove B, and the sealing cone surface of the valve core of the oil circuit switching check valve B is pressed on the sealing platform under the combined action of the spring force and the hydraulic pressure, and the oil circuit switching check valve B is closed, and the A port and the T port are blocked.

[0069] The valve core of the oil circuit switching check valve contacts the cam groove and moves along the trajectory of the cam, thereby pushing the valve core to move and realize the opening and closing of the oil circuit switching check valve. A cam groove and annular oil groove form a control groove group. Seal grooves are set on both sides of each control groove group to isolate the oil circuit. Multiple cam grooves can be processed on the rotary switch to control multiple oil circuit switching check valves. By designing different starting and ending positions of the rotary switch cam groove, the order of opening and closing of multiple oil circuit switching check valves can be conveniently controlled to realize the logical control of oil circuit action. Therefore, the oil circuit switching transition function can be realized. After a single oil circuit is completely closed, another oil circuit can be opened to avoid leakage during the oil circuit switching process.

[0070] Embodiment 4:

[0071] The gland is an annular structure with a plurality of fixing holes processed in the circumferential direction. The gland is fixed to the valve body by fastening bolts. The gland is coaxially arranged with the rotary switch, and the inner side of the gland contacts the side of the rotary switch to limit the movement of the rotary switch along the axis.

[0072] The flat piece used for manual operation of the rotary switch passes through the inner hole of the pressure cover so that it can be manually operated. At the same time, the pressure cover plays a certain protective role on the flat piece.

[0073] The inner groove of the gland is 24, see the instructions. Fig.11 In this example, the gland groove is processed into a 90° ring groove, which limits the rotation of the rotary switch to 90°, that is, the rotary switch can only rotate 90°, and the rotation end position is limited by the inner groove of the gland. When there are multiple oil circuit switching check valves, the maximum rotation angle can be designed according to actual needs.

[0074] In summary, the present invention can provide a rotary switch that can simultaneously drive one or more oil circuit switching one-way valves, thereby realizing a mechanical rotation-driven oil circuit switching mechanism for rotating and switching hydraulic oil circuits of an underwater robot.

[0075] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A mechanical rotary drive oil circuit switching mechanism, characterized in that: The mechanical rotary drive oil circuit switching mechanism comprises: a valve body, an oil circuit switching one-way valve, a rotary switch and a pressure cover, the rotary switch is inserted into the valve body, the rotary switch can rotate along its central axis, the pressure cover presses the end of the rotary switch to limit the movement of the rotary switch along the axis, the axis of the rotary switch is perpendicular to the axis of the oil circuit switching one-way valve, the outer periphery of the rotary switch is provided with at least one group of control groove groups consisting of cam grooves and oil grooves, each group of the control groove groups is provided with a sealing groove, a rotary sealing ring is installed in the sealing groove, the cross section of the cam groove is cam-shaped, the end of the valve core of the oil circuit switching one-way valve is against the cam groove, when the rotary switch rotates along its central axis, the cam groove can drive the end of the valve core to move, when the valve core moves, the oil circuit switching one-way valve is opened or closed, when the oil circuit switching one-way valve is opened, the flow channel inside the valve body is connected with the oil groove, and the oil groove is located at an adjacent position of the cam groove; The valve core is divided into four sections along the axial direction, which are a push rod section, a conical sealing section, a guide section and a spring guide section from outside to inside; the end of the push rod section is a spherical surface, which contacts the cam groove surface of the rotary switch, and the valve core push rod section, the guide section and the knob switch cam groove surface together constitute a cam push rod structure, and the outer side of the push rod section is a three-sided groove for oil flow at both ends of the push rod; the conical surface of the conical sealing section forms a conical seal when it contacts the inner circular edge of the inner hole boss of the shell; the guide section is cylindrical, and the outer side of the guide section is clearance-matched with the shell, and a plurality of evenly distributed oil flow grooves are machined on the outer side of the guide section along the axial direction.

2. The mechanical rotary drive oil circuit switching mechanism according to claim 1, characterized in that: The oil circuit switching one-way valve includes a housing, a valve core, a spring, a baffle, a retaining ring and a sealing ring. The valve core is installed in the housing. The valve core is coaxially arranged with the housing and can move axially along the housing. The end of the valve core is sealed with the conical surface of the housing. The spring is sleeved on the valve core, with one end against the valve core and the other end against the baffle. There is no relative movement between the baffle and the housing.

3. The mechanical rotary drive oil circuit switching mechanism according to claim 2, characterized in that: The baffle is in the shape of a circular plate with a circular hole in the center. The baffle and the retaining ring are sequentially sleeved on the valve core. The spring guide section is cylindrical. The spring guide section of the valve core passes through the circular hole of the baffle. The retaining ring is clamped in the mounting groove of the shell. A plurality of oil holes evenly distributed around the circumference are processed on the outer side of the baffle.

4. The mechanical rotary drive oil circuit switching mechanism according to claim 1, characterized in that: The valve core is in the shape of a cylindrical rod, the shell is a cylindrical cylinder, the outer side of the cylinder is processed with threads, the valve body and the oil circuit switching one-way valve are connected by threads, one end of the cylinder is processed with a mounting groove, a sealing ring is sleeved in the mounting groove, and the other end of the cylinder is processed with an inner hexagonal hole.

5. The mechanical rotary drive oil circuit switching mechanism according to claim 1, characterized in that: The rotary operation knob of the rotary switch is exposed outside the valve body, and the end of the rotary switch is processed into a flat sheet shape.

6. The mechanical rotary drive oil circuit switching mechanism according to claim 1, characterized in that: The gland is an annular structure with a plurality of fixing holes processed in the circumferential direction. The gland is fixed to the valve body by fastening bolts. The gland is coaxially arranged with the rotary switch, and the inner side of the gland contacts the side of the rotary switch to limit the movement of the rotary switch along the axis.

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