Hydraulic motor manual speed regulating valve and hydraulic motor manual speed regulating system

Abstract

The utility model discloses a hydraulic motor manual speed regulating valve and a hydraulic motor manual speed regulating system, and relates to the technical field of hydraulic motors, the hydraulic motor manual speed regulating valve comprises a valve body, the valve body is provided with two liquid passing through holes, a communicating through hole is arranged between the two liquid passing through holes, and the valve body is provided with a manual flow regulating mechanism capable of controlling the liquid passing amount of the communicating through hole; the diameter of the communicating through hole is smaller than that of the liquid passing through hole. According to the manual speed regulating valve of the hydraulic motor, on the premise that the structure of the hydraulic motor is not changed, the rotating speed of the hydraulic motor can be achieved only through the manual speed regulating valve of the hydraulic motor, and the manual speed regulating valve has the advantages of being simple in structure, fast in speed regulation and easy and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic motors, in particular to a hydraulic motor speed regulating valve and a hydraulic motor speed regulating system. Background Art

[0002] The hydraulic motor is an actuator of the hydraulic system. It converts the liquid pressure energy provided by the hydraulic pump into the mechanical energy (torque and speed) of its output shaft. Liquid is a medium for transmitting force and motion. Hydraulic motors are mainly used in injection molding machinery, ships, hoists, engineering machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical industry, port machinery, etc. Hydraulic motors sometimes need to adjust their speed frequently during work. For example, with the intelligentization and refinement of agricultural operations, the impact of agricultural machinery on the yield and quality of agricultural crops has received more and more attention. In the prior art, hydraulic motors are often used to drive agricultural machinery, such as sowing, walking, fertilizing, etc., which are all connected to hydraulic motors. In agricultural operations such as sowing, walking, fertilizing and other operations, the hydraulic motor speeds required are different for different plots of land, different crops, and different working conditions. In the prior art, the hydraulic motor speed regulation procedures are complicated and require professional personnel to operate. The hydraulic motor with automatic speed regulation function has the defects of high cost, great control difficulty, and complex structure. There is a lack of hydraulic motor manual speed regulation valves and hydraulic motor manual speed regulation systems that can adapt to agricultural work sites and manually adjust the speed according to work needs. Utility Model Content

[0003] The utility model aims to provide a manual speed regulating valve for a hydraulic motor to address the deficiencies in the prior art. The valve can adjust the speed of the hydraulic motor as required at the work site. The valve has the advantages of simple structure, fast speed regulation, easy operation and low cost.

[0004] The technical solution adopted by the utility model is as follows.

[0005] A manual speed regulating valve for a hydraulic motor comprises a valve body, on which two liquid passing through holes are arranged. The valve body is characterized in that a connecting through hole is arranged between the two liquid passing through holes, and the valve body is provided with a manual flow regulating mechanism which can control the amount of liquid passing through the connecting through hole; the diameter of the connecting through hole is smaller than the diameter of the liquid passing through hole.

[0006] When in use, one end of the two liquid through holes is connected to the two interfaces of the hydraulic motor respectively, and the other end of the two liquid through holes is connected to the two interfaces of the hydraulic station respectively.

[0007] The beneficial effects of the utility model are as follows: one of the two liquid through holes supplies liquid to the hydraulic motor, and the other discharges liquid from the hydraulic motor. The liquid flow rate of the communicating through hole is adjusted by a manual flow regulating mechanism, so that the hydraulic liquid of the liquid through hole supplying liquid to the hydraulic motor can be diverted to the hydraulic station, reducing the flow rate of the liquid through hole supplying liquid to the hydraulic motor, thereby reducing the speed of the hydraulic motor. The speed of the hydraulic motor can be achieved only by the manual speed regulating valve of the hydraulic motor without changing the structure of the hydraulic motor, and it has the advantages of simple structure, fast speed regulation, and easy operation.

[0008] As a preferred technical solution, the two liquid through holes are parallel to each other, and the connecting through hole is perpendicular to the two liquid through holes. The middle parts of the two liquid through holes are connected through the liquid through hole. With this technical solution, a speed regulating valve that can be adapted to the work site and manually adjust the speed according to work needs has good adaptability and high efficiency.

[0009] As a preferred technical solution, the cross section of the connecting through hole is circular; the manual flow regulating mechanism includes a first sealing rod; a first manual flow regulating mechanism threaded mounting hole is provided on the valve body; the first manual flow regulating mechanism threaded mounting hole is coaxially arranged with the connecting through hole and is located on the side of one liquid through hole away from the other liquid through hole; a radial outer peripheral surface of the first sealing rod close to the connecting through hole end is provided with a thread and is threadedly connected with the first manual flow regulating mechanism threaded mounting hole; the diameter of the first sealing rod is larger than the diameter of the cross section of the connecting through hole and smaller than the diameter of the liquid through hole; a first sealing rod rotating device is provided at the end of the first sealing rod away from the connecting through hole;

[0010] A sealing cone is coaxially arranged at the end of the first sealing rod near the connecting through hole. When the first sealing rod is rotated, the cone head of the sealing cone can pass through the liquid through hole closest to it and be inserted into the connecting through hole, and the radial outer peripheral surface of the cone tail of the sealing cone can seal the end of the connecting through hole near the first sealing rod. With this technical solution, the sealing degree of the cone head to the connecting through hole can be controlled by rotating the first sealing rod rotating device, which has the advantage of simple operation.

[0011] As a preferred technical solution, a first sealing nut is sleeved on the first sealing rod, and the first sealing nut is threadedly connected to the valve body; a first sealing ring is sleeved on the first sealing rod, and the first sealing ring is located in the first sealing nut. With this technical solution, the first sealing ring is compressed by the first sealing nut, which has the advantages of safety and reliability.

[0012] As a preferred technical solution, the valve body is provided with a first convex ring platform in the shape of a circular ring column, the inner hole of the first convex ring platform has the same diameter as the threaded mounting hole of the first manual flow regulating mechanism, is connected and coaxially arranged, the first sealing rod is threadedly connected to the inner hole of the first convex ring platform; the radial outer peripheral surface of the first convex ring platform is provided with threads, the first sealing nut is threadedly connected to the first convex ring platform; the first sealing rod rotating device is a turntable or a handle. This technical solution has the advantages of safety and reliability.

[0013] As an optimal technical solution, two liquid through holes are vertically arranged on the left and right ends of the valve body respectively; the connecting through hole is arranged horizontally; the two liquid through holes are arranged vertically; and the first convex ring platform is arranged on the left side or right side of the valve body.

[0014] As a preferred technical solution, the manual flow regulating mechanism includes a second sealing rod; a second manual flow regulating mechanism threaded mounting hole is provided on the valve body; the second manual flow regulating mechanism threaded mounting hole is vertically arranged with the connecting through hole and is located between the two liquid through holes and penetrates the connecting through hole; the radial outer peripheral surface of the second sealing rod close to the connecting through hole end is provided with a thread and is threadedly connected with the second manual flow regulating mechanism threaded mounting hole; the second sealing rod end away from the connecting through hole is provided with a second sealing rod rotating device; when the second sealing rod is rotated, the second sealing rod can pass through the liquid through hole and seal the connecting through hole. With this technical solution, the sealing degree of the connecting through hole can be controlled by rotating the second sealing rod rotating device, which has the advantage of simple operation.

[0015] As a preferred technical solution, a second sealing nut is sleeved on the second sealing rod, and the second sealing nut is threadedly connected to the valve body; a second sealing ring is sleeved on the second sealing rod, and the second sealing ring is located in the second sealing nut. With this technical solution, the second sealing ring is pressed by the second sealing nut, which has the advantages of safety and reliability.

[0016] As a preferred technical solution, the valve body is provided with a second convex ring platform in the shape of a circular ring column, the inner hole of the second convex ring platform has the same diameter as the threaded mounting hole of the second manual flow regulating mechanism, is connected and coaxially arranged; the second sealing rod is threadedly connected to the inner hole of the second convex ring platform; the threaded mounting hole of the second manual flow regulating mechanism is located in the second convex ring platform and is coaxial with the second convex ring platform, the radial outer peripheral surface of the second convex ring platform is provided with threads, and the second sealing nut is threadedly connected to the second convex ring platform; the second sealing rod rotating device is a turntable or a handle. This technical solution has the advantages of safety and reliability.

[0017] As a preferred technical solution, two liquid through holes are vertically arranged at the left and right ends of the valve body respectively; the connecting through hole is arranged horizontally; and the second convex ring platform is arranged on the front side, rear side, upper side or lower side of the valve body.

[0018] The hydraulic motor manual speed regulating system is characterized in that it comprises any one of the above-mentioned hydraulic motor manual speed regulating valves, and both ends of each liquid through hole are respectively connected to the hydraulic motor and the hydraulic station to form a hydraulic circuit.

[0019] As a preferred technical solution, each liquid through hole is connected to the hydraulic motor through a first reversing valve. The first reversing valve is a two-position four-way reversing valve. Alternatively, each liquid through hole is connected to the hydraulic station through a second reversing valve. The second reversing valve is a two-position four-way reversing valve. With this technical solution, the forward or reverse rotation of the hydraulic motor can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a preferred embodiment of the manual speed regulating valve for hydraulic motor of the utility model. Figure 2 yes Figure 1 A partial enlarged view of part A. Figure 3 yes Figure 1 A partial enlarged view of part B. Figure 4 yes Figure 1 A top view of the manual speed regulating valve of the hydraulic motor is shown. Figure 5 yes Figure 1 Front view of the manual speed regulating valve of the hydraulic motor shown. Figure 6 yes Figure 1 Bottom view of the manual speed regulating valve of the hydraulic motor shown. Figure 7 yes Figure 1 Left side view of the manual speed regulating valve of the hydraulic motor shown. Figure 8 yes Figure 1 Rear view of the manual speed regulating valve for the hydraulic motor shown. Fig. 9 yes Figure 6 The cross-sectional view of the manual speed regulating valve of the hydraulic motor along D-D' is shown. Fig.10 yes Fig. 9 A partial enlarged view of part F. Fig.11 yes Fig. 9 A partial enlarged view of part G. Fig.12 yes Figure 8 The shown figure is a cross-sectional view of the manual speed regulating valve of the hydraulic motor along EE'. Fig.13 yes Fig.12 A partial enlarged view of part H. Fig.14 Is adopted Figure 1 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig.15 yes Fig.14 A partial enlarged view of part I. Fig.16 yes Fig.14 A partial enlarged view of part J. Fig.17 Is adopted Fig.14 A state diagram of the hydraulic motor manual speed control system is shown. Fig.18 yes Fig.17 A partial enlarged view of part K. Fig.19 Is adopted Figure 1 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig. 20 Is adopted Fig.19 A state diagram of the hydraulic motor manual speed control system is shown. Fig.21 Is adopted Figure 1 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig. 22 Is adopted Figure 1 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig.23 Is adopted Fig. 22 A state diagram of the hydraulic motor manual speed control system is shown. Fig.24 It is a front view of a preferred embodiment of a manual speed regulating valve for a hydraulic motor. Fig.25 yes Fig.24 A top view of the manual speed regulating valve of the hydraulic motor is shown. Fig.26 yes Fig.24 Left side view of the manual speed regulating valve of the hydraulic motor shown. Fig. 27 yes Fig.24 Bottom view of the manual speed regulating valve of the hydraulic motor shown. Fig.28 yes Fig.25 The cross-sectional view of the manual speed regulating valve of the hydraulic motor is shown along L-L'. Fig.29 yes Fig.28 A partial enlarged view of part M. Fig.30 Is adopted Fig.28 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig.31 Is adopted Fig.30 A state diagram of the hydraulic motor manual speed control system is shown. Fig.32 Is adopted Fig. 27 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig.33 Is adopted Fig.32 A state diagram of the hydraulic motor manual speed control system is shown. Fig.34 It is a front view of a preferred embodiment of a manual speed regulating valve for a hydraulic motor. Fig.35 yes Fig.34 A top view of the manual speed regulating valve of the hydraulic motor is shown. Fig.36 yes Fig.34 Left side view of the manual speed regulating valve of the hydraulic motor shown. Fig.37 yes Fig.35 The shown figure is a cross-sectional view of the manual speed regulating valve of the hydraulic motor along N-N'. Fig.38 yes Fig.37 A partial enlarged view of part O. Fig.39 Is adopted Fig.37 The structure diagram of a preferred embodiment of a hydraulic motor manual speed control system of a hydraulic motor manual speed control valve is shown. Fig.40 Is adopted Fig.39 A state diagram of the hydraulic motor manual speed control system is shown. Fig.41 It is a front view of a preferred embodiment of a manual speed regulating valve for a hydraulic motor. Fig.42 yes Fig.41 A top view of the manual speed regulating valve of the hydraulic motor is shown. Fig.43 yes Fig.41 Left side view of the manual speed regulating valve of the hydraulic motor shown. Fig.44 yes Fig.41 The cross-sectional view of the manual speed regulating valve of the hydraulic motor is shown along PP'. Fig.45 It is a front view of a preferred embodiment of a manual speed regulating valve for a hydraulic motor. Fig.46 yes Fig.45 A top view of the manual speed regulating valve of the hydraulic motor is shown. Fig.47 yes Fig.45 Left side view of the manual speed regulating valve of the hydraulic motor shown. Fig.48 yes Fig.45 The cross-sectional view of the manual speed regulating valve of the hydraulic motor along Q-Q' is shown.

[0021] Wherein: valve body-1; first manual flow regulating mechanism threaded mounting hole-11; second manual flow regulating mechanism threaded mounting hole-12; first convex ring platform-13; inner hole of first convex ring platform-131; second convex ring platform-14; inner hole of second convex ring platform-141; third convex ring platform-15; inner hole of third convex ring platform-151; liquid through hole-2; hydraulic motor-3; hydraulic station-4; connecting through hole-5; manual flow regulating mechanism-6; first sealing rod-61; sealing cone-62; first sealing rod rotating device-63; second sealing rod-64; second sealing rod rotating device-65; first reversing valve-7; second reversing valve-71; first sealing nut-81; first sealing ring-82; second sealing nut-83; second sealing ring-84; pipeline-9; connecting spiral tube 91. DETAILED DESCRIPTION

[0022] Below, the utility model is further described in conjunction with the drawings and embodiments.

[0023] Example 1. Figure 1-13As shown, a manual speed regulating valve for a hydraulic motor comprises a valve body 1, and two liquid through holes 2 are provided on the valve body 1. The valve body 1 is characterized in that: a connecting through hole 5 is provided between the two liquid through holes 2, and a manual flow regulating mechanism 6 capable of controlling the amount of liquid passing through the connecting through hole 5 is provided on the valve body 1; the diameter of the connecting through hole 5 is smaller than the diameter of the liquid through hole 2. The two liquid through holes 2 are parallel to each other, and the connecting through hole 5 is perpendicular to the two liquid through holes 2. The middle parts of the two liquid through holes 2 are connected through the liquid through hole 2. The two liquid through holes 2 are respectively arranged vertically at the left and right ends of the valve body 1; the connecting through hole 5 is arranged horizontally; and the first convex ring platform 13 is arranged on the right side surface of the valve body 1. The valve body is in a cubic shape. The cross section of the connecting through hole 5 is circular; the manual flow regulating mechanism 6 includes a first sealing rod 61; a first manual flow regulating mechanism threaded mounting hole 11 is provided on the valve body 1; the first manual flow regulating mechanism threaded mounting hole 11 is coaxially arranged with the connecting through hole 5 and is located on the right side of the liquid through hole 2 at the right end of the valve body 1; the radial outer peripheral surface of the first sealing rod 61 close to the connecting through hole 5 is provided with threads and is threadedly connected with the first manual flow regulating mechanism threaded mounting hole 11; the diameter of the first sealing rod 61 is larger than the diameter of the cross section of the connecting through hole 5 and smaller than the diameter of the liquid through hole 2; the first sealing rod 61 is provided with a first sealing rod rotating device 63 at the end away from the connecting through hole 5. The first manual flow regulating mechanism threaded mounting hole 11 is arranged horizontally. The end of the first sealing rod 61 near the connecting through hole 5 is coaxially provided with a sealing cone 62. When the first sealing rod 61 is rotated, the cone head of the sealing cone 62 can pass through the liquid through hole 2 located at the right end of the valve body 1 and insert into the connecting through hole 5, and the radial outer peripheral surface of the cone tail of the sealing cone 62 can seal the right end of the connecting through hole 5. The sealing degree of the cone head to the connecting through hole 5 can be controlled by rotating the first sealing rod rotating device 63, which has the advantage of simple operation. The first sealing nut 81 is mounted on the first sealing rod 61, and the first sealing nut 81 is threadedly connected to the valve body 1; the first sealing ring 82 is mounted on the first sealing rod 61, and the first sealing ring 82 is located in the first sealing nut 81. Pressing the first sealing ring 82 by the first sealing nut 81 has the advantages of safety and reliability.

[0024] A first convex ring platform 13 in the shape of a circular column is transversely arranged on the right side surface of the valve body 1. The inner hole 131 of the first convex ring platform has the same diameter as the threaded mounting hole 11 of the first manual flow regulating mechanism and is connected and coaxially arranged. The first sealing rod 61 is threadedly connected to the inner hole 131 of the first convex ring platform; the radial outer peripheral surface of the first convex ring platform 13 is provided with threads, and the first sealing nut 81 is threadedly connected to the first convex ring platform 13; the first sealing rod rotating device 63 is a turntable, which has the advantages of safety and reliability. A connecting solenoid 91 is threadedly installed on the upper end of each liquid through hole 2. The connecting solenoid 91 is used to connect the pipeline 9. A third convex ring platform 15 in the shape of a circular column is arranged at the lower end of each liquid through hole 2 on the lower side surface of the valve body 1. The inner hole 151 of the third convex ring platform is connected to the inner hole of each liquid through hole 2 closest to it; the radial outer peripheral surface of the third convex ring platform 15 is provided with threads. The third convex ring platform 15 is used to connect the pipeline 9. When in use, the upper ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic motor 3, and the lower ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic station 4. The two liquid through holes 2 are arranged vertically.

[0025] One of the two liquid through holes 2 supplies liquid to the hydraulic motor 3, and the other discharges liquid from the hydraulic motor 3. The amount of liquid flowing through the communicating through hole 5 is adjusted by the manual flow regulating mechanism 6, so that the hydraulic liquid of the liquid through hole 2 supplying liquid to the hydraulic motor 3 can be diverted to the hydraulic station 4, reducing the flow of the liquid through hole 2 supplying liquid to the hydraulic motor 3, thereby reducing the speed of the hydraulic motor 3. The speed of the hydraulic motor 3 can be achieved only by the manual speed regulating valve of the hydraulic motor without changing the structure of the hydraulic motor, which has the advantages of simple structure, fast speed regulation and easy operation.

[0026] Example 2. Figure 14-17 As shown, the hydraulic motor manual speed regulating system includes the hydraulic motor manual speed regulating valve described in Example 1, and the two ends of each liquid through hole 2 are respectively connected to the hydraulic motor 3 and the hydraulic station 4 to form a hydraulic circuit. Specifically, the upper ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic motor 3 through pipelines 9, and the lower ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic station 4 through pipelines 9. The pipeline 9 is a hose, and the length is omitted. Fig.17 As shown. Rotate the first sealing rod 61, the cone head portion of the sealing cone 62 can pass through the liquid through hole 2 closest to it and insert into the connecting hole 5, and the radial outer peripheral surface of the cone tail of the sealing cone 62 seals the connecting hole 5 near the end of the first sealing rod 61. At this time, the oil starts from the interface at the left end of the hydraulic station 4, passes through the liquid through hole 2 located at the left end of the valve body 1, and enters the hydraulic motor through the interface at the left end of the hydraulic motor 3. Then the oil flows out from the interface at the right end of the hydraulic motor, passes through the liquid through hole 2 located at the right end of the valve body 1, and enters the interface at the right end of the hydraulic station 4, forming a loop. As shown Fig.14As shown, the first sealing rod 61 is rotated, and the radial outer peripheral surface of the cone tail of the sealing cone 62 does not seal the end of the communication hole 5 close to the first sealing rod 61, and the hydraulic fluid flows from the liquid through hole 2 at the left end of the valve body 1 to the liquid through hole 2 at the right end of the valve body 1, reducing the flow rate of the liquid through hole 2 supplying liquid to the hydraulic motor 3, thereby reducing the rotation speed of the hydraulic motor 3. The arrow shows the flow direction of the liquid.

[0027] Example 3. Figure 19-20 As shown, the difference between this embodiment and embodiment 2 is that each liquid through hole 2 is connected to the hydraulic motor 3 through a first reversing valve 7. The first reversing valve 7 is a two-position four-way reversing valve. With this technical solution, the forward or reverse rotation of the hydraulic motor 3 can be controlled.

[0028] Example 4. Fig.21 As shown, the difference between this embodiment and embodiment 2 is that the first manual flow regulating mechanism threaded mounting hole 11 is coaxially arranged with the connecting through hole 5 and is located on the side of the liquid through hole 2 at the left end of the valve body 1 away from the other liquid through hole 2. The first convex ring 13 is arranged on the left side surface of the valve body 1.

[0029] Example 5. Figure 22-23 As shown, the difference between this embodiment and embodiment 2 is that each liquid through hole 2 is connected to the hydraulic station 4 through a second reversing valve 71. The second reversing valve 71 is a two-position four-way reversing valve. With this technical solution, the forward or reverse rotation of the hydraulic motor 3 can be controlled.

[0030] Example 6. Figure 24-29 As shown, the difference between this embodiment and embodiment 1 is that: the manual flow regulating mechanism 6 includes a second sealing rod 64; a second manual flow regulating mechanism threaded mounting hole 12 is provided on the valve body 1; the second manual flow regulating mechanism threaded mounting hole 12 is vertically arranged with the connecting through hole 5 and is located between the two liquid through holes 2 and passes through the connecting through hole 5; the radial outer peripheral surface of the second sealing rod 64 close to the end of the connecting through hole 5 is provided with a thread and is threadedly connected with the second manual flow regulating mechanism threaded mounting hole 12.

[0031] The second sealing rod 64 is sleeved with a second sealing nut 83, which is threadedly connected to the valve body 1; the second sealing rod 64 is sleeved with a second sealing ring 84, which is located in the second sealing nut 83. With this technical solution, the second sealing ring 84 is pressed by the second sealing nut 83, which has the advantages of safety and reliability.

[0032] The valve body 1 is provided with a second convex ring platform 14 in the shape of a circular ring column, the inner hole 141 of the second convex ring platform is of the same diameter as the second manual flow adjustment mechanism threaded mounting hole 12, and is connected and coaxially arranged; the second sealing rod 64 is threadedly connected to the inner hole 141 of the second convex ring platform; the second manual flow adjustment mechanism threaded mounting hole 12 is located in the second convex ring platform 14 and is coaxial with the second convex ring platform 14, the radial outer peripheral surface of the second convex ring platform 14 is provided with threads, and the second sealing nut 83 is threadedly connected to the second convex ring platform 14; the second sealing rod rotating device 65 is a rotating disk. This technical solution has the advantages of safety and reliability.

[0033] The two liquid through holes 2 are respectively arranged vertically at the left and right ends of the valve body 1 ; the connecting through hole 5 is arranged horizontally; and the second convex ring platform 14 is arranged on the lower side of the valve body 1 .

[0034] The second sealing rod 64 is provided with a second sealing rod rotating device 65 at the end away from the connecting through hole; when the second sealing rod 64 is rotated, the second sealing rod 64 can pass through the liquid through hole 2 and seal the connecting through hole 5. By rotating the second sealing rod rotating device 65, the degree of blocking the overnight area of ​​the connecting through hole 5 can be controlled, which has the advantage of simple operation. The second sealing rod rotating device 65 is a rotating disk.

[0035] Example 7. Figure 30-31 As shown, the manual speed control system of the hydraulic motor includes the manual speed control valve of the hydraulic motor described in Example 6. The two ends of each liquid through hole 2 are respectively connected to the hydraulic motor 3 and the hydraulic station 4 to form a hydraulic circuit. Specifically, the upper ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic motor 3 through pipelines 9, and the lower ends of the two liquid through holes 2 are respectively connected to the two interfaces of the hydraulic station 4 through pipelines 9. The pipeline 9 is a hose, and the length is omitted. The arrow shows the flow direction of the liquid. The hydraulic motor 3 is a hydraulic motor for agricultural machinery. The speed control valve can be adapted to the work site and can manually adjust the speed according to the needs of agricultural work. It can adapt to the manual speed control of agricultural machinery or agricultural machinery driven by hydraulic motors in working conditions such as walking, sowing, and fertilizing, and has good adaptability and high efficiency.

[0036] Example 8. Figure 32-33 As shown, the difference between this embodiment and embodiment 7 is that each liquid through hole 2 is connected to the hydraulic motor 3 through a first reversing valve 7. The first reversing valve 7 is a two-position four-way reversing valve. With this technical solution, the forward or reverse rotation of the hydraulic motor 3 can be controlled.

[0037] Example 9. Figure 34-40 As shown, the difference between this embodiment and embodiment 7 is that the second convex ring platform 14 is arranged on the upper side of the valve body 1.

[0038] Example 10. Figures 41-44As shown, the difference between this embodiment and embodiment 6 is that the second convex ring platform 14 is arranged on the front side of the valve body 1.

[0039] Example 11. Figures 45-48 As shown, the difference between this embodiment and embodiment 6 is that the second protruding ring platform 14 is arranged on the rear side of the valve body 1. The second sealing rod rotating device 65 is a handle.

Claims

1. A manual speed regulating valve for a hydraulic motor, comprising a valve body (1), the valve body (1) being provided with two liquid through holes (2), characterized in that: A communication through hole (5) is provided between the two liquid passing through holes (2), and a manual flow regulating mechanism (6) capable of controlling the amount of liquid passing through the communication through hole (5) is provided on the valve body (1); the diameter of the communication through hole (5) is smaller than the diameter of the liquid passing through hole (2); The two liquid-passing through holes (2) are parallel to each other, and the connecting through hole (5) is perpendicular to the two liquid-passing through holes (2); the middle parts of the two liquid-passing through holes (2) are connected through the liquid-passing through hole (2); The cross section of the connecting hole (5) is circular; the manual flow regulating mechanism (6) comprises a first sealing rod (61); a first manual flow regulating mechanism threaded mounting hole (11) is provided on the valve body (1); the first manual flow regulating mechanism threaded mounting hole (11) is coaxially arranged with the connecting hole (5) and is located on the side of one liquid passing hole (2) away from the other liquid passing hole (2); a radial outer peripheral surface of the first sealing rod (61) close to the connecting hole (5) is provided with threads and is threadedly connected to the first manual flow regulating mechanism threaded mounting hole (11); the diameter of the first sealing rod (61) is larger than the diameter of the cross section of the connecting hole (5) and smaller than the diameter of the liquid passing hole (2); a first sealing rod rotating device (63) is provided at the end of the first sealing rod (61) away from the connecting hole (5); A sealing cone (62) is coaxially provided at the end of the first sealing rod (61) close to the connecting through hole (5). When the first sealing rod (61) is rotated, the cone head portion of the sealing cone (62) can pass through the liquid through hole (2) closest to it and be inserted into the connecting through hole (5), and the radial outer peripheral surface of the cone tail of the sealing cone (62) can seal the end of the connecting through hole (5) close to the first sealing rod (61).

2. The manual speed regulating valve for a hydraulic motor according to claim 1, characterized in that: A first sealing nut (81) is sleeved on the first sealing rod (61), and the first sealing nut (81) is threadedly connected to the valve body (1); a first sealing ring (82) is sleeved on the first sealing rod (61), and the first sealing ring (82) is located inside the first sealing nut (81).

3. The manual speed regulating valve for a hydraulic motor as claimed in claim 2, characterized in that: The valve body (1) is provided with a first convex ring platform (13) in the shape of a circular column. The inner hole (131) of the first convex ring platform has the same diameter as the threaded mounting hole (11) of the first manual flow regulating mechanism, is connected and coaxially arranged, and the first sealing rod (61) is threadedly connected to the inner hole (131) of the first convex ring platform; the radial outer peripheral surface of the first convex ring platform (13) is provided with threads, and the first sealing nut (81) is threadedly connected to the first convex ring platform (13); the first sealing rod rotating device (63) is a turntable or a handle; the two liquid through holes (2) are respectively arranged vertically at the left and right ends of the valve body (1); the connecting through hole (5) is arranged horizontally, and the two liquid through holes (2) are arranged vertically; the first convex ring platform (13) is arranged on the left side surface or the right side surface of the valve body (1).

4. The manual speed regulating valve for a hydraulic motor according to claim 1, characterized in that: The manual flow regulating mechanism (6) comprises a second sealing rod (64); a second manual flow regulating mechanism threaded mounting hole (12) is provided on the valve body (1); the second manual flow regulating mechanism threaded mounting hole (12) is arranged perpendicular to the communication through hole (5) and is located between the two liquid through holes (2) and penetrates the communication through hole (5); A radial outer peripheral surface of the second sealing rod (64) close to the end of the communicating through hole (5) is provided with threads and is threadedly connected to the threaded mounting hole (12) of the second manual flow regulating mechanism; A second sealing rod rotating device (65) is provided at the end of the second sealing rod (64) away from the communicating through hole; when the second sealing rod (64) is rotated, the second sealing rod (64) can pass through the liquid through hole (2) and seal the communicating through hole (5).

5. The manual speed regulating valve for a hydraulic motor as claimed in claim 4, characterized in that: A second sealing nut (83) is sleeved on the second sealing rod (64), and the second sealing nut (83) is threadedly connected to the valve body (1); a second sealing ring (84) is sleeved on the second sealing rod (64), and the second sealing ring (84) is located inside the second sealing nut (83).

6. The manual speed regulating valve for a hydraulic motor as claimed in claim 5, characterized in that: The valve body (1) is provided with a second convex ring platform (14) in the shape of a circular ring column; the inner hole (141) of the second convex ring platform and the threaded mounting hole (12) of the second manual flow regulating mechanism have the same diameter and are connected and coaxially arranged; the second sealing rod (64) is threadedly connected to the inner hole (141) of the second convex ring platform; The second manual flow regulating mechanism threaded mounting hole (12) is located in the second convex ring platform (14) and is coaxial with the second convex ring platform (14); the radial outer peripheral surface of the second convex ring platform (14) is provided with threads; the second sealing nut (83) is threadedly connected to the second convex ring platform (14); the second sealing rod rotating device (65) is a rotating disk or a handle; The two liquid through holes (2) are respectively arranged vertically at the left and right ends of the valve body (1); the communication through hole (5) is arranged horizontally; and the second convex ring platform (14) is arranged on the front side surface, the rear side surface, the upper side surface, or the lower side surface of the valve body (1). 7.Hydraulic motor manual speed control system, characterized by: The hydraulic motor manual speed regulating valve comprises the hydraulic motor manual speed regulating valve as claimed in any one of claims 1 to 6, wherein both ends of each liquid through hole (2) are respectively connected to the hydraulic motor (3) and the hydraulic station (4) to form a hydraulic circuit.

8. The manual speed control system for a hydraulic motor according to claim 7, characterized in that: Each of the liquid through holes (2) is connected to the hydraulic motor (3) via a first reversing valve (7), or each of the liquid through holes (2) is connected to the hydraulic station (4) via a second reversing valve (71).

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