Control valve and transplanter

Abstract

The present application relates to a control valve and a transplanter. The control valve includes a main body structure, a valve rod, a hydraulic valve, and a rotating member. The valve rod is movably disposed in a valve cavity to control the main oil inlet passage to communicate with a working oil passage through the valve cavity, or the valve rod can control the main oil inlet passage to communicate with a second oil return passage through the valve cavity and the working oil passage to communicate with a first oil return passage through the valve cavity. The hydraulic valve is movably disposed in the working oil passage, and the rotating member is movably engaged with the hydraulic valve to control the on / off of the working oil passage. When the main oil inlet passage communicates with the working oil passage through the valve cavity, the pressurized oil can push the hydraulic valve to open the working oil passage. When the working oil passage communicates with the first oil return passage through the valve cavity, the rotating member can rotate a preset angle to push the hydraulic valve to open the working oil passage. The control valve provided by the present application greatly reduces the difficulty for the operator to actively open the hydraulic valve, simplifies the operation of opening the hydraulic valve, and thus is beneficial to improving the working efficiency of the transplanter.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery, and particularly to a control valve and a transplanter. Background Art

[0002] Generally, a transplanter realizes the mechanical actions of the transplanter through a control valve. The control valve includes a main body structure, a valve rod, and a hydraulic valve. The main body structure is provided with a valve cavity, a main oil inlet passage, a working oil passage, a first oil return passage, and a second oil return passage. The valve rod is movably arranged in the valve cavity to control the main oil inlet passage to communicate with the working oil passage through the valve cavity, or the valve rod can control the main oil inlet passage to communicate with the second oil return passage through the valve cavity and the working oil passage to communicate with the first oil return passage through the valve cavity. The hydraulic valve is movably arranged in the working oil passage to control the on-off of the working oil passage.

[0003] Specifically, when the operator controls the valve rod to move towards one side, the main oil inlet passage communicates with the working oil passage through the valve cavity. At this time, the pressurized oil fluid enters the working oil passage from the main oil inlet passage, and the pressurized oil fluid pushes the hydraulic valve to open. Finally, the pressurized oil fluid enters the transplanter table from the working oil passage, and the hydraulic pressure received by the transplanter table increases. Then the transplanter table rises. When the operator controls the valve rod to move towards the other side, the main oil inlet passage communicates with the second oil return passage through the valve cavity and the working oil passage communicates with the first oil return passage through the valve cavity. Due to the presence of the hydraulic valve, the working oil passage is in a closed state without interference. Therefore, the pressurized oil fluid in the main oil inlet passage cannot flow back through the second oil return passage. At this time, the hydraulic pressure received by the transplanter table remains unchanged, and the transplanter table remains fixed. If the operator actively opens the hydraulic valve to open the working oil passage, the pressurized oil fluid will flow back from the working oil passage through the first oil return passage. At this time, the hydraulic pressure received by the transplanter table decreases, and then the transplanter table descends. However, the process of the operator actively opening the hydraulic valve is relatively cumbersome, which is not conducive to improving the working efficiency of the transplanter. Summary of the Invention

[0004] Based on this, it is necessary to provide a control valve and a transplanter to solve the problem that the process of the operator actively opening the hydraulic valve is relatively cumbersome, which is not conducive to improving the working efficiency of the transplanter.

[0005] The control valve provided by this application includes a main body structure, a valve stem, a hydraulic valve, and a rotating member. The main body structure is provided with a valve cavity, a main oil inlet passage, a working oil passage, a first oil return passage, and a second oil return passage. The valve stem is movably arranged in the valve cavity to control the main oil inlet passage to communicate with the working oil passage through the valve cavity, or the valve stem can control the main oil inlet passage to communicate with the second oil return passage through the valve cavity and the working oil passage to communicate with the first oil return passage through the valve cavity. The hydraulic valve is movably arranged in the working oil passage, and the rotating member is movably matched with the hydraulic valve to control the on-off of the working oil passage. When the main oil inlet passage communicates with the working oil passage through the valve cavity, the pressure oil can push the hydraulic valve to open the working oil passage. When the working oil passage communicates with the first oil return passage through the valve cavity, the rotating member can rotate a preset angle to push the hydraulic valve to open the working oil passage.

[0006] In one embodiment, the hydraulic valve includes a second movable plug and a second elastic member. The second elastic member can push the second movable plug to block the working oil passage. The rotating member is provided with an eccentric part, and the eccentric part abuts against the second movable plug. When the rotating member rotates a preset angle, the eccentric part can push the hydraulic valve to open the working oil passage. It can be understood that such a setting is beneficial to reducing the structural complexity of the rotating member and improving the reliability of the control valve.

[0007] In one embodiment, the main body structure is provided with a rotating groove, the rotating groove is arranged at one end of the second movable plug, and the rotating member is rotatably inserted into the rotating groove. It can be understood that such a setting is beneficial to reducing the assembly difficulty between the rotating member and the main body structure.

[0008] In one embodiment, the axial direction of the rotating groove is perpendicular to the axial direction of the second movable plug. It can be understood that such a setting is beneficial to facilitating the torque transmission of the rotating member to the hydraulic valve.

[0009] In one embodiment, the end of the rotating member away from the eccentric part extends out of the rotating groove, and the end of the rotating member away from the eccentric part is provided with a mounting hole for mounting a rotating lever. It can be understood that such a setting is beneficial to reducing the rotation difficulty of the rotating member and improving the rotation efficiency of the rotating member.

[0010] In one embodiment, a guide rod is fixedly arranged at the end of the second movable plug away from the second elastic member. The outer wall of the guide rod is slidably matched with the inner wall of the working oil passage, and the eccentric part abuts against the guide rod. When the rotating member rotates a preset angle, the eccentric part can push the hydraulic valve to open the working oil passage through the guide rod. It can be understood that such a setting is beneficial to preventing the second movable plug from being eccentric during the movement process.

[0011] In one embodiment, the guide rod is provided with a pressure difference passage communicating the rotating groove and the working oil passage. It can be understood that such a setting is beneficial to enabling the pressure oil to apply a pressure towards the second movable plug to the guide rod.

[0012] In one embodiment, the cross-section of the eccentric part is bow-shaped. It can be understood that such a setting is beneficial to reducing the processing difficulty of the eccentric part.

[0013] In one embodiment, a stepped structure is provided in the working oil passage. When the second movable plug seals the working oil passage, the second movable plug abuts against the stepped structure.

[0014] The present application also provides a transplanter, which includes the control valve described in any one of the above embodiments.

[0015] Compared with the prior art, for the control valve and the transplanter provided by the present application, it is the force that directly pushes the hydraulic valve to move, while the torque is generated when the rotating member is rotated. Since the torque is equal to the force multiplied by the force arm, therefore, when the torque remains unchanged, the required acting force can be reduced by increasing the force arm, so as to achieve a more labor-saving effect. Therefore, the linear movement of the hydraulic valve is indirectly realized by rotating the rotating member, which greatly reduces the difficulty for the staff to actively open the hydraulic valve, simplifies the operation of opening the hydraulic valve, and thus is beneficial to improving the working efficiency of the transplanter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Cross-section view of the control valve according to an embodiment of the present application Figure 1 ;

[0018] Figure 2 Cross-section view of the control valve according to an embodiment of the present application Figure 2 ;

[0019] Figure 3 Schematic diagram of the cross-section of the eccentric part according to an embodiment of the present application.

[0020] Reference numerals: 100, main body structure; 110, valve cavity; 120, main oil inlet passage; 130, working oil passage; 131, stepped structure; 140, first oil return passage; 150, second oil return passage; 160, rotating groove; 200, valve stem; 300, hydraulic valve; 310, second movable plug; 320, second elastic member; 330, guide rod; 331, pressure difference passage; 400, rotating member; 410, eccentric portion; 420, mounting hole; 500, valve body assembly; 510, seat body; 520, high-pressure plug; 530, first passage; 600, fixed valve core assembly; 610, second passage; 630, fixed section; 640, blocking section; 650, guiding section; 700, movable valve core assembly; 710, first movable plug; 711, accommodating cavity; 720, first elastic member. Detailed implementation manners

[0021] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0023] In the present application, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Generally, a transplanter realizes the mechanical actions of the transplanter through a control valve, such as Figure 1 and Figure 2 As shown, the control valve includes a main body structure 100, a valve stem 200 and a hydraulic valve 300. The main body structure 100 is provided with a valve cavity 110, a main oil inlet passage 120, a working oil passage 130, a first oil return passage 140 and a second oil return passage 150. The valve stem 200 is movably disposed in the valve cavity 110 to control the main oil inlet passage 120 to communicate with the working oil passage 130 through the valve cavity 110, or the valve stem 200 can control the main oil inlet passage 120 to communicate with the second oil return passage 150 through the valve cavity 110 and the working oil passage 130 to communicate with the first oil return passage 140 through the valve cavity 110. The hydraulic valve 300 is movably disposed in the working oil passage 130 to control the on-off of the working oil passage 130.

[0028] Specifically, as Figure 1 and Figure 2As shown, when the operator controls the valve stem 200 to move towards one side, the main oil inlet passage 120 is connected to the working oil passage 130 through the valve cavity 110. At this time, the pressurized oil enters the working oil passage 130 from the main oil inlet passage 120, and the pressurized oil pushes the hydraulic valve 300 to open. Finally, the pressurized oil enters the rice transplanter table (not shown in the figure) from the working oil passage 130, and the hydraulic pressure received by the rice transplanter table increases. Thus, the rice transplanter table rises. When the operator controls the valve stem 200 to move towards the other side, the main oil inlet passage 120 is connected to the second oil return passage 150 through the valve cavity 110 and the working oil passage 130 is connected to the first oil return passage 140 through the valve cavity 110. Due to the presence of the hydraulic valve 300, the working oil passage 130 is in a closed state without interference. Therefore, the pressurized oil in the main oil inlet passage 120 cannot flow back through the second oil return passage 150. At this time, the hydraulic pressure received by the rice transplanter table remains unchanged, and the rice transplanter table remains fixed. If the operator actively opens the hydraulic valve 300 to open the working oil passage 130, the pressurized oil will flow back from the working oil passage 130 through the first oil return passage 140. At this time, the hydraulic pressure received by the rice transplanter table decreases, and thus the rice transplanter table descends. However, the process of the operator actively opening the hydraulic valve 300 is relatively cumbersome, which is not conducive to improving the working efficiency of the rice transplanter.

[0029] In order to reduce the difficulty for the operator to actively open the hydraulic valve 300 and simplify the operation of opening the hydraulic valve 300, the present application provides a control valve and a rice transplanter, as Figure 2 shown, the control valve includes a rotating member 400, and the rotating member 400 is movably engaged with the hydraulic valve 300 to control the on-off of the working oil passage 130. When the working oil passage 130 is connected to the first oil return passage 140 through the valve cavity 110, the rotating member 400 can rotate a preset angle to push the hydraulic valve 300 to open the working oil passage 130. It should be noted that the control of the rotating member 400 rotating a preset angle can be controlled by a motor or manually by the operator, and the size of the preset angle can also be set according to actual needs. What directly pushes the hydraulic valve 300 to move is force, while what is generated when the rotating member 400 rotates is torque. Since torque is equal to force multiplied by the force arm, therefore, when the torque remains unchanged, the required acting force can be reduced by increasing the force arm, so as to achieve a more labor-saving effect. Therefore, the linear movement of the hydraulic valve 300 is indirectly realized by rotating the rotating member 400, which greatly reduces the difficulty for the operator to actively open the hydraulic valve 300, simplifies the operation of opening the hydraulic valve 300, and thus is conducive to improving the working efficiency of the rice transplanter.

[0030] In order to reduce the structural complexity of the rotating member 400 and improve the reliability of the control valve, further, in this embodiment, as Figure 2As shown, the rotating member 400 is provided with an eccentric portion 410, and the eccentric portion 410 abuts against the second movable plug 310. When the rotating member 400 rotates by a preset angle, the eccentric portion 410 can push the hydraulic valve 300 to open the working oil passage 130. It should be noted that the eccentric portion 410 refers to an eccentric structure with unequal distances from the outer peripheral side to the rotating shaft. Specifically, the eccentric portion 410 can be an eccentric wheel, and in this application, as Figure 3 shown, the eccentric portion 410 is a columnar structure with a bow-shaped cross-section. When the eccentric portion 410 abuts against the hydraulic valve 300 from the side closer to the rotation axis and rotates to the side farther from the rotation axis to abut against the hydraulic valve 300, without the rotation axis shifting, the hydraulic valve 300 is directly pushed away from the rotation axis by the eccentric portion 410, thereby opening the hydraulic valve 300. Further, the rotating member 400 processes the cylinder into the required bow-shaped eccentric portion 410 by cutting. With such a setting, it is beneficial to reduce the processing difficulty of the eccentric portion 410. It should be noted that the hydraulic valve 300 includes a second movable plug 310 and a second elastic member 320, and the second elastic member 320 can push the second movable plug 310 to block the working oil passage 130. Generally, the second elastic member 320 is a compression spring.

[0031] In other embodiments, the rotating member 400 can also push the hydraulic valve 300 to open by the meshing of a gear and a rack. Specifically, the rotating member 400 is provided with a gear structure (not shown in the figure), and the hydraulic valve 300 is provided with a linear rack structure (not shown in the figure). The gear structure is meshed and connected with the rack structure, and when the gear structure rotates, it drives the rack structure to move linearly, thereby realizing the driving of the hydraulic valve 300 by the rotating member 400.

[0032] In order to reduce the assembly difficulty between the rotating member 400 and the main body structure 100, in one embodiment, as Figure 2 shown, the main body structure 100 is provided with a rotating groove 160. The rotating groove 160 is arranged at one end of the second movable plug 310, and the rotating member 400 is rotatably inserted into the rotating groove 160. Further, in order to facilitate the torque transmission of the rotating member 400 to the hydraulic valve 300, in one embodiment, the axial direction of the rotating groove 160 is perpendicular to the axial direction of the second movable plug 310. Further still, in order to reduce the rotation difficulty of the rotating member 400 and improve the rotation efficiency of the rotating member 400, in one embodiment, the end of the rotating member 400 away from the eccentric portion 410 extends out of the rotating groove 160, and the end of the rotating member 400 away from the eccentric portion 410 is provided with a mounting hole 420 for mounting a rotating lever (not shown in the figure).

[0033] In order to prevent the second movable plug 310 from being eccentric during movement, in one embodiment, as Figure 2As shown, at one end of the second movable plug 310 away from the second elastic member 320, a guide rod 330 is fixedly provided. The outer wall of the guide rod 330 is slidably engaged with the inner wall of the working oil passage 130. The eccentric portion 410 abuts against the guide rod 330. When the rotating member 400 rotates a preset angle, the eccentric portion 410 can push the hydraulic valve 300 through the guide rod 330 to open the working oil passage 130. Further, the inner diameter of the working oil passage 130 that cooperates with the guide rod 330 is smaller than the inner diameter of the working oil passage 130 that cooperates with the second movable plug 310, and a step structure 131 is formed between the two. When the second movable plug 310 blocks the working oil passage 130, the second movable plug 310 abuts against the step structure 131. However, it is not limited to this, and the step structure 131 can also be other forms of convex structures.

[0034] In order to make the pressure oil apply a pressure towards the second movable plug 310 to the guide rod 330, in one embodiment, as Figure 2 shown, the guide rod 330 is provided with a differential pressure passage 331 that communicates the rotating groove 160 and the working oil passage 130. Due to the existence of the differential pressure passage 331, the total pressure received by the guide rod 330 towards the second movable plug 310 is greater than the total pressure towards away from the second movable plug 310, and a pressure difference is formed between the two, thereby pushing the guide rod 330 to open the second movable plug 310.

[0035] In order to prevent the hydraulic pressure of the pressure oil in the main oil inlet passage 120 from being too high, as Figure 1 shown, the control valve provided in this application is provided with a check valve between the main oil inlet passage 120 and the first oil return passage 140. When the hydraulic pressure in the main oil inlet passage 120 exceeds the maximum hydraulic value, the pressure oil can enter the first oil return passage 140 from the main oil inlet passage 120 by pushing open the check valve, thereby keeping the hydraulic pressure in the main oil inlet passage 120 below the maximum hydraulic value.

[0036] Specifically, as Figure 1 shown, the check valve includes a valve body assembly 500, a fixed spool assembly 600, and a movable spool assembly 700. The valve body assembly 500 is provided with a first passage 530. The fixed spool assembly 600 is fixedly provided at the opening of the first passage 530, and the fixed spool assembly 600 is provided with a second passage 610 that can communicate with the first passage 530. The movable spool assembly 700 is movably provided in the first passage 530, and the movable spool assembly 700 is movably engaged with the fixed spool assembly 600 to communicate or block the first passage 530 and the second passage 610. It should be noted that the check valve is provided in the main body structure 100, the valve body assembly 500 controls a part of the main body structure 100, the valve body assembly 500 and the main body structure 100 can be fixedly connected or integrally formed, the first passage 530 communicates with the first oil return passage 140, and the second passage 610 communicates with the main oil inlet passage 120.

[0037] When the hydraulic pressure of the pressurized oil in the main oil inlet channel 120 exceeds the maximum hydraulic value, the pressurized oil enters the second channel 610 from the main oil inlet channel 120, and then the pressurized oil pushes the valve core assembly 700 to connect the first channel 530 and the second channel 610, and the pressurized oil enters the second channel 610. Finally, the pressurized oil enters the first oil return channel 140 from the second channel 610, thereby maintaining the hydraulic pressure in the main oil inlet channel 120 below the maximum hydraulic value.

[0038] In order to improve the response speed of the moving valve core assembly 700, in one embodiment, as Figure 1 As shown, the movable valve core assembly 700 includes a first movable plug 710 and a first elastic member 720, one end of the first elastic member 720 is connected to the valve body assembly 500, and the other end is connected to the first movable plug 710, so that the first movable plug 710 has a tendency to cut off the first channel 530 and the second channel 610. Further, the first elastic member 720 is a compression spring, one end of the compression spring abuts against the valve body assembly 500, and the other end abuts against the movable valve core assembly 700. By setting the elastic coefficient of the compression spring, the elastic force of the movable valve core assembly 700 can be indirectly set, and then the maximum hydraulic pressure value in the main oil inlet channel 120 can be set.

[0039] When the pressure oil flows from the second channel 610 into the first channel 530, the flow rate of the pressure oil is too fast, which may cause vibration and abnormal noise at the one-way valve. In order to solve the above problem, in one embodiment, as shown in FIG. Figure 1 As shown, the first movable plug 710 is provided with a receiving chamber 711, and one end of the second channel 610 connected to the first channel 530 extends into the receiving chamber 711. The fixed valve core assembly 600 closes or opens the opening of the receiving chamber 711 to isolate or connect the first channel 530 and the second channel 610. In this way, the pressure oil will first pass through the receiving chamber 711 before entering the first channel 530 from the second channel 610. Since one end of the second channel 610 connected to the first channel 530 extends into the receiving chamber 711, a vortex will be generated after the pressure oil enters the receiving chamber 711. The vortex can significantly reduce the flow rate of the pressure oil, thereby reducing the vibration and abnormal sound generated by the one-way valve.

[0040] In order to improve the installation convenience of the fixed valve core assembly 600, in one embodiment, as Figure 1As shown, the fixed spool assembly 600 includes a fixed section 630 and a plugging section 640. The plugging section 640 is fixedly connected to the opening of the first channel 530. The plugging section 640 is fixed to one end of the fixed section 630 close to the moving spool assembly 700, and the plugging section 640 can close or open the opening of the accommodation cavity 711. Specifically, the second channel 610 passes through the fixed section 630 and the plugging section 640 along the axial position of the fixed spool assembly 600, and the fixed section 630 is in interference fit with the inner wall of the first channel 530 on the side close to the main oil inlet channel 120.

[0041] In order to improve the sealing performance between the plugging section 640 and the first movable plug 710, in one embodiment, as Figure 1 shown, the plugging section 640 is in the shape of a tapered tube, and the plugging section 640 can be partially inserted into the accommodation cavity 711.

[0042] During the movement of the moving spool assembly 700, eccentricity is likely to occur. To solve the problem of eccentricity of the moving spool assembly 700, in one embodiment, as Figure 1 shown, the fixed spool assembly 600 further includes a guiding section 650. The guiding section 650 is fixed to one end of the plugging section 640 away from the fixed section 630, and the guiding section 650 is inserted into the accommodation cavity 711 and is in sliding fit with the inner wall of the accommodation cavity 711. Further, the outlet of the second channel 610 located in the accommodation cavity 711 extends along the circumferential direction of the guiding section 650, but is not limited thereto. The outlet of the second channel 610 located in the accommodation cavity 711 may also extend along the axial direction of the guiding section 650.

[0043] In order to reduce the assembly difficulty of the one-way valve, in one embodiment, as Figure 1 shown, the valve body assembly 500 includes a seat body 510 and a high-pressure plug 520. The first channel 530 is provided in the seat body 510, and the high-pressure plug 520 is fixedly provided at the opening of the first channel 530 on the surface of the seat body 510. In this way, the part of the one-way valve provided in the first channel 530 can be installed in the first channel 530 through the opening of the first channel 530 on the surface of the seat body 510.

[0044] This application also provides a transplanter, which includes the control valve described in any one of the above embodiments.

[0045] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0046] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A control valve, characterized in that, It includes a main body structure (100), a valve stem (200), a hydraulic valve (300) and a rotating member (400). The main body structure (100) is provided with a valve cavity (110), a main oil inlet passage (120), a working oil passage (130), a first oil return passage (140) and a second oil return passage (150). The valve stem (200) is movably arranged in the valve cavity (110) to control the main oil inlet passage (120) to communicate with the working oil passage (130) through the valve cavity (110), or the valve stem (200) can control the main oil inlet passage (120) to communicate with the second oil return passage (150) through the valve cavity (110) and the working oil passage (130) to communicate with the first oil return passage (140) through the valve cavity (110). The hydraulic valve (300) is movably arranged in the working oil passage (130). The rotating member (400) is movably matched with the hydraulic valve (300) to control the on-off of the working oil passage (130). When the main oil inlet passage (120) communicates with the working oil passage (130) through the valve cavity (110), the pressurized oil can push the hydraulic valve (300) to open the working oil passage (130). When the working oil passage (130) communicates with the first oil return passage (140) through the valve cavity (110), the rotating member (400) can rotate a preset angle to push the hydraulic valve (300) to open the working oil passage (130). The hydraulic valve (300) includes a second movable plug (310) and a second elastic member (320). The second elastic member (320) can push the second movable plug (310) to block the working oil passage (130). The rotating member (400) is provided with an eccentric part (410). The eccentric part (410) abuts against the second movable plug (310). When the rotating member (400) rotates a preset angle, the eccentric part (410) can push the hydraulic valve (300) to open the working oil passage (130).

2. The control valve according to claim 1, wherein The main body structure (100) is provided with a rotating groove (160). The rotating groove (160) is arranged at one end of the second movable plug (310), and the rotating member (400) is rotatably inserted into the rotating groove (160).

3. The control valve according to claim 2, characterized in that, The axial direction of the rotating groove (160) is perpendicular to the axial direction of the second movable plug (310).

4. The control valve according to claim 2, characterized in that, One end of the rotating member (400) away from the eccentric part (410) extends out of the rotating groove (160), and an installation hole (420) is arranged at one end of the rotating member (400) away from the eccentric part (410). The installation hole (420) is used for installing a rotating lever.

5. The control valve according to claim 2, characterized in that, One end of the second movable plug (310) away from the second elastic member (320) is fixedly provided with a guide rod (330). The outer wall of the guide rod (330) is slidably engaged with the inner wall of the working oil passage (130). The eccentric portion (410) abuts against the guide rod (330). When the rotating member (400) rotates a preset angle, the eccentric portion (410) can push the hydraulic valve (300) through the guide rod (330) to open the working oil passage (130).

6. The control valve according to claim 5, wherein The guide rod (330) is provided with a differential pressure passage (331) communicating the rotating groove (160) and the working oil passage (130).

7. The control valve according to claim 1, characterized in that, The cross-section of the eccentric portion (410) is bow-shaped.

8. The control valve according to claim 1, characterized in that, A stepped structure (131) is provided in the working oil passage (130). When the second movable plug (310) blocks the working oil passage (130), the second movable plug (310) abuts against the stepped structure (131).

9. A transplanter, characterized in that, Comprising a control valve according to any one of claims 1-8.

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