Control valve and rice transplanter

Abstract

The present application relates to a control valve and a rice transplanter, wherein the one-way valve includes a valve body assembly, a fixed valve core assembly and a moving valve core assembly. The valve body assembly is provided with a first channel. The fixed valve core assembly is fixedly arranged at the opening of the first channel, and the fixed valve core assembly is provided with a second channel capable of connecting to the first channel. The moving valve core assembly can be movably arranged in the first channel, and the moving valve core assembly and the fixed valve core assembly can movably cooperate to connect or cut off the first channel and the second channel. The one-way valve, control valve and rice transplanter provided in the present application solve the problem that the hydraulic pressure of the pressure oil in the main oil inlet channel of the control valve is too high, which easily leads to damage to the control valve.

Description

Technical Field

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

[0002] Typically, a rice transplanter achieves its mechanical motion through a control valve, which includes a main structure, a valve stem, and a hydraulic valve. The main structure is provided with a valve chamber, a main oil inlet channel, a working oil channel, a first oil return channel, and a second oil return channel. The valve stem can be movably disposed in the valve chamber to control the main oil inlet channel to connect to the working oil channel through the valve chamber, or the valve stem can control the main oil inlet channel to connect to the second oil return channel through the valve chamber and the working oil channel to connect to the first oil return channel through the valve chamber. The hydraulic valve can be movably disposed in the working oil channel to control the on / off switching of the working oil channel. However, if the hydraulic pressure of the pressurized oil in the main oil inlet channel of the control valve is too high, the control valve can be easily damaged. Summary of the Invention

[0003] Based on this, it is necessary to provide a one-way valve, a control valve and a rice transplanter to solve the problem that the hydraulic pressure of the pressure oil in the main oil inlet channel of the control valve is too high, which easily causes damage to the control valve.

[0004] The one-way valve provided herein includes a valve body assembly, a fixed valve core assembly, and a movable valve core assembly. The valve body assembly defines a first channel. The fixed valve core assembly is fixedly mounted at the opening of the first channel, and the fixed valve core assembly defines a second channel that communicates with the first channel. The movable valve core assembly is movably mounted within the first channel, and the movable valve core assembly and the fixed valve core assembly flexibly cooperate to connect or block the first and second channels.

[0005] In one embodiment, the movable valve core assembly includes a first movable plug and a first elastic member. One end of the first elastic member is connected to the valve body assembly, and the other end is connected to the first movable plug, so that the first movable plug has a tendency to isolate the first channel from the second channel. It is understood that this arrangement is conducive to improving the response speed of the movable valve core assembly.

[0006] In one embodiment, the first movable plug is provided with a receiving chamber, and one end of the second passage, which is connected to the first passage, extends into the receiving chamber. The fixed valve core assembly closes or opens the opening of the receiving chamber to isolate or connect the first and second passages. It is understood that this arrangement helps reduce vibration and abnormal noise generated by the one-way valve.

[0007] In one embodiment, the fixed valve core assembly includes a fixed section and a blocking section. The blocking section is fixedly connected to the opening of the first channel. The blocking section is fixed to one end of the fixed section near the movable valve core assembly and can close or open the opening of the accommodating chamber. It is understood that this arrangement facilitates the installation of the fixed valve core assembly.

[0008] In one embodiment, the blocking section is in a tapered tubular shape and can be partially inserted into the accommodating cavity. It is understood that such a configuration is conducive to improving the sealing performance of the blocking section and the first movable plug.

[0009] In one embodiment, the fixed valve core assembly further includes a guide segment, which is fixed to the end of the blocking segment away from the fixed segment. The guide segment is inserted into the accommodating cavity and slidably engages with the inner wall of the accommodating cavity. It is understood that this arrangement helps to solve the problem of eccentricity of the movable valve core assembly.

[0010] In one embodiment, the first elastic member is a compression spring, one end of the compression spring abuts against the valve body assembly, and the other end abuts against the movable valve core assembly.

[0011] In one embodiment, the valve body assembly includes a seat body and a high-pressure plug, wherein the first passage is provided in the seat body, and the high-pressure plug is fixedly mounted at an opening of the first passage on a surface of the seat body. It is understood that such a configuration helps to reduce the difficulty of assembling the one-way valve.

[0012] The present application also provides a control valve, which includes a main structure and a one-way valve described in any one of the above embodiments. The one-way valve is arranged in the main structure, and the main structure is provided with a main oil inlet channel and a first oil return channel. The first channel is connected to the first oil return channel, and the second channel is connected to the main oil inlet channel.

[0013] The present application also provides a rice transplanter, which includes the control valve described in the above embodiment.

[0014] Compared with the prior art, the one-way valve, control valve and rice transplanter provided by the present application, when the hydraulic pressure of the pressure oil in the main oil inlet channel exceeds the maximum hydraulic value, the pressure oil enters the second channel from the main oil inlet channel, and then the pressure oil pushes the valve core assembly to connect the first channel and the second channel, and the pressure oil enters the second channel, and finally, the pressure oil enters the first return oil channel from the second channel, thereby maintaining the hydraulic pressure in the main oil inlet channel below the maximum hydraulic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A cross-sectional view of a control valve according to an embodiment of the present application Figure 1 ;

[0017] Figure 2A cross-sectional view of a control valve according to an embodiment of the present application Figure 2 ;

[0018] Figure 3 Schematic diagram of the cross section of the eccentric portion according to an embodiment of the present application.

[0019] 1. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 2. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 3. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 4. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 5. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 6. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 7. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 8. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 9. The oil return channel is a main channel of the hydraulic system, and the oil return channel is a main channel of the hydraulic system. 10. DETAILED DESCRIPTION

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0022] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. 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 methods.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Usually, the rice transplanter realizes the mechanical action of the rice transplanter through the control valve, such as Figure 1 and Figure 2As shown, the control valve includes a main structure 100, a valve stem 200, and a hydraulic valve 300. The main structure 100 is provided with a valve chamber 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 within the valve chamber 110 to control the connection between the main oil inlet passage 120 and the working oil passage 130 via the valve chamber 110. Alternatively, the valve stem 200 can control the connection between the main oil inlet passage 120 and the second oil return passage 150 via the valve chamber 110, and the connection between the working oil passage 130 and the first oil return passage 140 via the valve chamber 110. The hydraulic valve 300 is movably disposed within the working oil passage 130 to control the on / off operation of the working oil passage 130.

[0027] Specifically, if Figure 1 and Figure 2 As shown, when the operator controls the valve stem 200 to move to one side, the main oil inlet channel 120 connects to the working oil channel 130 through the valve chamber 110. At this time, pressurized oil enters the working oil channel 130 from the main oil inlet channel 120, and the pressurized oil pushes the hydraulic valve 300 to open. Ultimately, the pressurized oil enters the transplanting platform (not shown), increasing the hydraulic pressure on the transplanting platform. This causes the transplanting platform to rise. When the operator controls the valve stem 200 to move to the other side, the main oil inlet channel 120 connects to the second oil return channel 150 through the valve chamber 110, and the working oil channel 130 connects to the first oil return channel 140 through the valve chamber 110. Due to the presence of the hydraulic valve 300, the working oil channel 130 is closed unless otherwise indicated. Therefore, the pressurized oil in the main oil inlet channel 120 cannot flow back through the second oil return channel 150. At this time, the hydraulic pressure on the transplanting platform remains unchanged, and the transplanting platform remains fixed. If the operator actively opens the hydraulic valve 300, thereby opening the working oil channel 130, the pressurized oil will flow back from the working oil channel 130 through the first oil return channel 140, reducing the hydraulic pressure on the transplanting platform and causing the transplanting platform to descend. However, the process of the operator actively opening the hydraulic valve 300 is relatively cumbersome and is not conducive to improving the working efficiency of the rice transplanter.

[0028] In order to reduce the difficulty of the staff 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, such as Figure 2As shown, the control valve includes a rotating member 400, which flexibly cooperates with the hydraulic valve 300 to control the opening and closing of the working oil passage 130. When the working oil passage 130 is connected to the first oil return passage 140 through the valve chamber 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 to rotate the preset angle can be controlled by a motor or manually by a worker, and the preset angle can also be set according to actual needs. While force directly pushes the hydraulic valve 300 to move, rotating the rotating member 400 generates torque. Since torque is equal to force multiplied by the lever arm, if the torque remains unchanged, the required force can be reduced by increasing the lever arm, thereby achieving a more labor-saving effect. Therefore, indirectly achieving linear movement of the hydraulic valve 300 by rotating the rotating member 400 greatly reduces the difficulty for workers to actively open the hydraulic valve 300, simplifies the operation of opening the hydraulic valve 300, and thus helps improve the operating efficiency of the rice transplanter.

[0029] 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 shown in FIG. Figure 2 As shown, the rotating member 400 is provided with an eccentric portion 410, which abuts against the second movable plug 310. When the rotating member 400 rotates a preset angle, the eccentric portion 410 can push the hydraulic valve 300 to open the working oil channel 130. It should be noted that the eccentric portion 410 refers to an eccentric structure in which the distance between the outer peripheral side and the rotating axis is unequal. Specifically, the eccentric portion 410 can be an eccentric wheel. In this application, Figure 3 As shown, the eccentric portion 410 is a columnar structure with an arched cross-section. When the eccentric portion 410 rotates from abutting the hydraulic valve 300 on the side closer to the rotation axis to abutting the hydraulic valve 300 on the side farther from the rotation axis, the hydraulic valve 300 is directly pushed away from the rotation axis by the eccentric portion 410 without displacement of the rotation axis, thereby opening the hydraulic valve 300. Furthermore, the rotating member 400 is machined from a cylinder into the desired arched eccentric portion 410 through cutting. This arrangement helps reduce the difficulty of machining 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. The second elastic member 320 can push the second movable plug 310 to seal the working oil passage 130. Typically, the second elastic member 320 is a compression spring.

[0030] In other embodiments, the rotating member 400 can also push the hydraulic valve 300 to open by engaging the gear and the rack. Specifically, a gear structure (not shown) is provided on the rotating member 400, and a linear rack structure (not shown) is provided on the hydraulic valve 300. The gear structure is meshed with the rack structure, and the gear structure drives the rack structure to move in a straight line when rotating, thereby realizing that the rotating member 400 drives the hydraulic valve 300 to move.

[0031] In order to reduce the difficulty of assembling the rotating member 400 and the main structure 100, in one embodiment, as shown in FIG. Figure 2 As shown, the main structure 100 is provided with a rotation groove 160, which is provided at one end of the second movable plug 310, and the rotating member 400 is rotatably inserted into the rotation groove 160. Furthermore, in order to facilitate the transmission of the torque of the rotating member 400 to the hydraulic valve 300, in one embodiment, the axial direction of the rotation groove 160 is perpendicular to the axial direction of the second movable plug 310. Furthermore, in order to reduce the difficulty of rotating 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 rotation groove 160, and the end of the rotating member 400 away from the eccentric portion 410 is provided with a mounting hole 420, and the mounting hole 420 is used to mount a rotating lever (not shown).

[0032] In order to prevent the second movable plug 310 from being eccentric during the movement, in one embodiment, as shown in FIG. Figure 2 As shown, a guide rod 330 is fixed to one end of the second movable plug 310 away from the second elastic member 320. The outer wall of the guide rod 330 slides with the inner wall of the working oil passage 130, and 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. Furthermore, 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, forming a step structure 131 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, this is not limited to this, and the step structure 131 can also be a raised structure of other forms.

[0033] In order to make the pressure oil exert pressure on the guide rod 330 toward the second movable plug 310, in one embodiment, as shown in FIG. Figure 2As shown, the guide rod 330 is provided with a pressure differential channel 331 that connects the rotation groove 160 and the working oil channel 130. Due to the presence of the pressure differential channel 331, the total pressure on the guide rod 330 toward the second movable plug 310 is greater than the total pressure away from the second movable plug 310, creating a pressure differential between the two, thereby pushing the guide rod 330 to open the second movable plug 310.

[0034] In order to prevent the hydraulic pressure of the pressure oil in the main oil inlet channel 120 from being too high, Figure 1 As shown, the control valve provided in the present application is provided with a one-way valve between the main oil inlet channel 120 and the first oil return channel 140. When the hydraulic pressure in the main oil inlet channel 120 exceeds the maximum hydraulic value, the pressurized oil can enter the first oil return channel 140 from the main oil inlet channel 120 by pushing open the one-way valve, thereby maintaining the hydraulic pressure in the main oil inlet channel 120 below the maximum hydraulic value.

[0035] Specifically, if Figure 1 As shown, the one-way valve includes a valve body assembly 500, a fixed valve core assembly 600, and a movable valve core assembly 700. The valve body assembly 500 is provided with a first channel 530. The fixed valve core assembly 600 is fixedly mounted at the opening of the first channel 530, and the fixed valve core assembly 600 is provided with a second channel 610 that can communicate with the first channel 530. The movable valve core assembly 700 is movably mounted in the first channel 530, and the movable valve core assembly 700 and the fixed valve core assembly 600 flexibly cooperate to connect or block the first channel 530 and the second channel 610. It should be noted that the one-way valve is disposed in the main structure 100, and the valve body assembly 500 controls a portion of the valve main structure 100. The valve body assembly 500 and the main structure 100 can be fixedly connected or integrally formed. The first channel 530 communicates with the first oil return channel 140, and the second channel 610 communicates with the main oil inlet channel 120.

[0036] 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. Afterwards, 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.

[0037] In order to improve the response speed of the moving valve core assembly 700, in one embodiment, as Figure 1As 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 block the first channel 530 and the second channel 610. Furthermore, the first elastic member 720 is a compression spring, one end of which abuts the valve body assembly 500 and the other end abuts the movable valve core assembly 700. By adjusting the elastic coefficient of the compression spring, the elastic force of the movable valve core assembly 700 can be indirectly adjusted, thereby setting the maximum hydraulic pressure in the main oil inlet channel 120.

[0038] During the process of the pressure oil flowing 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 communicating with the first channel 530 extends into the receiving chamber 711. The fixed valve core assembly 600 isolates or connects the first channel 530 and the second channel 610 by closing or opening the opening of the receiving chamber 711. In this way, the pressurized oil will first pass through the receiving chamber 711 before entering the first channel 530 from the second channel 610. Since the end of the second channel 610 communicating with the first channel 530 extends into the receiving chamber 711, the pressurized oil will generate a vortex after entering the receiving chamber 711. The vortex can significantly reduce the flow rate of the pressurized oil, thereby reducing the vibration and abnormal noise generated by the one-way valve.

[0039] In order to improve the installation convenience of the fixed valve core assembly 600, in one embodiment, as shown in FIG. Figure 1 As shown, the fixed valve core assembly 600 includes a fixed section 630 and a blocking section 640. The blocking section 640 is fixedly connected to the opening of the first channel 530. The blocking section 640 is fixedly arranged at the end of the fixed section 630 near the movable valve core assembly 700, and the blocking section 640 can close or open the opening of the accommodating chamber 711. Specifically, the second channel 610 passes through the fixed section 630 and the blocking section 640 along the axis of the fixed valve core assembly 600, and the fixed section 630 forms an interference fit with the inner wall of the first channel 530 on the side near the main oil inlet channel 120.

[0040] In order to improve the sealing performance of the sealing section 640 and the first movable plug 710, in one embodiment, as shown in FIG. Figure 1 As shown, the blocking section 640 is in a tapered tubular shape, and the blocking section 640 can be partially inserted into the accommodating cavity 711 .

[0041] The moving valve core assembly 700 is prone to eccentricity during movement. In order to solve the problem of eccentricity of the moving valve core assembly 700, in one embodiment, as shown in FIG. Figure 1As shown, the fixed valve core assembly 600 further includes a guide section 650, which is fixedly mounted at an end of the blocking section 640 away from the fixed section 630. The guide section 650 is inserted into the accommodating chamber 711 and slidably engages with the inner wall of the accommodating chamber 711. Furthermore, the outlet of the second channel 610 within the accommodating chamber 711 extends along the circumference of the guide section 650, but the invention is not limited thereto. The outlet of the second channel 610 within the accommodating chamber 711 may also extend along the axial direction of the guide section 650.

[0042] In order to reduce the difficulty of assembling the one-way valve, in one embodiment, as Figure 1 As shown, the valve body assembly 500 includes a seat body 510 and a high-pressure plug 520. A first passage 530 is provided in the seat body 510, and the high-pressure plug 520 is fixedly mounted at an opening of the first passage 530 on the surface of the seat body 510. In this way, the portion of the one-way valve disposed in the first passage 530 can be installed in the first passage 530 through the opening of the first passage 530 on the surface of the seat body 510.

[0043] The present application also provides a rice transplanter, which includes the control valve described in any one of the above embodiments.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A control valve, characterized in that: The invention comprises a main structure (100), a valve stem (200), a hydraulic valve (300), a rotating member (400) and a one-way valve. The main structure (100) is provided with a valve chamber (110), a main oil inlet channel (120), a working oil channel (130), a first oil return channel (140) and a second oil return channel (150). The valve stem (200) is movably arranged in the valve chamber (110) to control the main oil inlet channel (120) to be connected to the working oil channel (130) through the valve chamber (110). Alternatively, the valve stem (200) can control the main oil inlet channel (120) to be connected to the second oil return channel (150) through the valve chamber (110), and the working oil channel (130) to be connected to the first oil return channel (140) through the valve chamber (110). The hydraulic valve (300) is movably disposed in the working oil passage (130), and the rotating member (400) movably cooperates with the hydraulic valve (300) to control the opening and closing of the working oil passage (130). When the main oil inlet passage (120) is connected to the working oil passage (130) through the valve chamber (110), the pressurized oil can push the hydraulic valve (300) to open the working oil passage (130). When the working oil passage (130) is connected to the first oil return passage (140) through the valve chamber (110), the rotating member (400) can rotate a preset angle to push the hydraulic valve (300) to open the working oil passage (130). The one-way valve is arranged in the main structure (100), and the one-way valve includes a valve body assembly (500), a fixed valve core assembly (600) and a movable valve core assembly (700). The valve body assembly (500) is provided with a first channel (530), and the first channel (530) is connected to the first oil return channel (140); the fixed valve core assembly (600) is fixed at the opening of the first channel (530), and the fixed valve core assembly (600) is provided with a second channel (610) capable of connecting to the first channel (530), and the second channel (610) is connected to the main oil inlet channel (120); and the movable valve core assembly (700) is movably arranged in the first channel (530), and the movable valve core assembly (700) and the fixed valve core assembly (600) are movably matched to connect or block the first channel (530) and the second channel (610).

2. The control valve according to claim 1, characterized in that The movable valve core assembly (700) includes a first movable plug (710) and a first elastic member (720), wherein 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 isolate the first channel (530) and the second channel (610).

3. The control valve according to claim 2, characterized in that 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) isolates or connects the first channel (530) and the second channel (610) by closing or opening the opening of the receiving chamber (711).

4. The control valve according to claim 3, characterized in that The fixed valve core assembly (600) includes a fixed section (630) and a blocking section (640), wherein the blocking section (640) is fixedly connected to the opening of the first channel (530), and the blocking section (640) is fixedly arranged at one end of the fixed section (630) close to the movable valve core assembly (700), and the blocking section (640) can close or open the opening of the accommodating chamber (711).

5. The control valve according to claim 4, characterized in that The blocking section (640) is in a tapered tubular shape, and the blocking section (640) can be partially inserted into the accommodating cavity (711).

6. The control valve according to claim 4, characterized in that The fixed valve core assembly (600) further includes a guide section (650), which is fixed to one end of the blocking section (640) away from the fixed section (630), and the guide section (650) is inserted into the accommodating cavity (711) and slidably engaged with the inner wall of the accommodating cavity (711).

7. The control valve according to claim 2, wherein: The first elastic member (720) is a compression spring, one end of which abuts against the valve body assembly (500), and the other end of which abuts against the movable valve core assembly (700).

8. The control valve according to claim 1, wherein: The valve body assembly (500) comprises a seat body (510) and a high-pressure plug (520), wherein the first channel (530) is provided on the seat body (510), and the high-pressure plug (520) is fixedly provided at an opening of the first channel (530) on the surface of the seat body (510).

9. A rice transplanter, characterized in that: Comprising the control valve according to any one of claims 1 to 8.

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