A high-precision adjustable flow output device

Abstract

The invention discloses a high-precision adjustable flow output device, comprising a hydraulic cylinder, a one-way valve group, a pipeline, a connecting rod, a motor, a turntable, a nut slider, an adjusting nut and a screw. When working, the motor drives the turntable to rotate, and at the same time drives the hydraulic cylinder rod to move left and right through the connecting rod. When the hydraulic cylinder rod moves to the left, the piston compresses the left working chamber and makes the oil in the left working chamber enter the oil drain pipe through the first one-way valve, and the oil in the oil suction pipe enters the right working chamber through the fourth one-way valve. When the hydraulic cylinder rod moves to the right, the piston compresses the right working chamber and makes the oil in the right working chamber enter the oil drain pipe through the second one-way valve, and the oil in the oil suction pipe enters the right working chamber through the third one-way valve; the stable flow output of the oil drain pipe is achieved by repeatedly compressing the working chamber to the left or right by the piston, and the position of the nut slider on the screw is changed by rotating the adjusting nut and the screw, thereby changing the travel range of the piston moving back and forth in the first cylinder body, and finally achieving high-precision flow regulation of the oil drain pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of adjustable flow output, and in particular to a high-precision adjustable flow output device. Background Art

[0002] Existing technology uses flow valves to perform a certain degree of flow control function on the flow system. For example, a flow regulating device is used in the pipeline network to set the flow according to the design. The flow valve is adjusted by the flow valve. Under the action of the liquid, the flow valve can automatically eliminate the flow deviation caused by the residual pressure head and pressure fluctuation of the pipeline. Regardless of how the system pressure changes, the set flow is maintained unchanged, so that the output flow is set at a constant value. The flow output count of the flow valve becomes a simple time count, which effectively solves the flow output count problem.

[0003] At present, the high-precision flow valve is a multifunctional valve that uses a high-precision pilot method to control the flow, but its structure is complex. It is suitable for pipelines with hydraulic pipes that need to control flow and pressure. It keeps the predetermined flow unchanged and appropriately reduces the output pressure. Even if the pressure upstream of the main valve changes, it will not affect the flow downstream of the main valve. However, during the application process, due to the influence of factors such as output pressure changes and leakage, the output flow accuracy of the flow valve is not high. Therefore, the existing technology needs to be further improved and perfected.

[0004] In the flow output system, the volume of the liquid is output according to the periodic change of the volume of the hydraulic cylinder. Since the leakage of the hydraulic cylinder is very small, the flow output is constant within a cycle. Based on this principle, the present invention adopts a constant speed and accurate rotation speed counting motor as the power to further improve the accuracy of the output flow, and utilizes the method of changing the working volume of the hydraulic cylinder to expand the high-precision adjustable flow output function, which can be adapted to high-precision output output occasions. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-precision adjustable flow output device.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A high-precision adjustable flow output device mainly includes a hydraulic cylinder, a one-way valve group, a pipeline, a connecting rod, a motor, a turntable, a nut slider, an adjusting nut, and a screw. The hydraulic cylinder includes a cylinder body, a piston, and a hydraulic cylinder rod. The one-way valve group includes at least four one-way valves, namely a first one-way valve, a second one-way valve, a third one-way valve, and a fourth one-way valve.

[0008] Specifically, the piston is arranged in the cylinder body, can move in the cylinder body, and divides the cylinder body into two independent left and right working chambers. The hydraulic cylinder rod passes through the cylinder body and the piston rod, and is hinged to one end of the connecting rod, and the piston is driven to move in the cylinder body through the connecting rod. The input end of the first one-way valve is connected to the left working chamber, and the output end is connected to the oil drain pipe through a pipeline. The input end of the second one-way valve is connected to the right working chamber, and the output end is connected to the oil drain pipe through a pipeline. The input end of the third one-way valve is connected to the oil suction pipe through a pipeline, and the output end is connected to the left working chamber. The input end of the fourth one-way valve is connected to the oil suction pipe through a pipeline, and the output end is connected to the right working chamber.

[0009] Specifically, the motor is fixedly connected to the center of the turntable through the motor shaft and drives the turntable to rotate. The turntable is provided with a guide groove, and the guide groove passes through the center of the turntable. The screw rod is arranged in the guide groove, one end of which is fixed, and the other end is connected to the adjusting nut, and the screw rod can be driven to rotate through the adjusting nut. The nut slider is arranged on the screw rod, and the distance between the nut slider and the center of the turntable changes as the screw rod rotates. The other end of the connecting rod is rotatably connected to the nut slider.

[0010] Furthermore, the high-precision adjustable flow output device also includes a joint for controlling the oil pressure at the end of the oil drain pipe and a relief valve. One end of the joint is connected to the oil drain pipe, and the other end is connected to the relief valve.

[0011] As a preferred embodiment of the present invention, the one-way valve mainly comprises a first valve body, a valve core and a first spring. One end of the first valve body is provided with an input port, and the other end is provided with an output port. One end of the valve core abuts against the input port, and the other end abuts against the output port through the first spring.

[0012] As a preferred embodiment of the present invention, the overflow valve mainly includes a second valve body, a spring pressure block, and a steel ball, a steel ball pressure block and a second spring arranged in the second valve body. The input end of the second valve body is connected to the oil drain pipe, and the output end is connected to the outside or other pipelines. The spring pressure block is installed at the end of the second valve body, opposite to the input end of the second valve body. The steel ball is installed on the steel ball pressure block, and the steel ball pressure block is pressed on the input end of the second valve body by one end of the second spring. The other end of the second spring abuts against the spring pressure block.

[0013] As a preferred solution of the present invention, the left and right working chambers adopt a symmetrical structural design.

[0014] As a preferred solution of the present invention, the motor is a stepper motor or a servo motor.

[0015] The working process and principle of the present invention are as follows: during operation, the motor drives the turntable to rotate, and the nut slider attached to the turntable rotates with the turntable, and at the same time drives the hydraulic cylinder rod to move left and right through the connecting rod. When the hydraulic cylinder rod moves to the left, the piston compresses the left working chamber (the first one-way valve and the fourth one-way valve are opened, and the second one-way valve and the third one-way valve are closed) and the oil in the left working chamber enters the oil drain pipe through the first one-way valve, and the oil in the oil suction pipe enters the right working chamber through the fourth one-way valve. When the hydraulic cylinder rod moves to the right, the piston compresses the right working chamber (the first one-way valve and the fourth one-way valve are closed, and the second one-way valve and the third one-way valve are opened) and the oil in the right working chamber enters the oil drain pipe through the second one-way valve, and the oil in the oil suction pipe enters the right working chamber through the third one-way valve; the stable flow output of the oil drain pipe is achieved by repeatedly compressing the working chamber to the left or right by the piston, and the position of the nut slider on the screw is changed by rotating the adjusting nut and the screw rod, thereby changing the travel range of the piston moving back and forth in the first cylinder body, and finally achieving high-precision flow regulation of the oil drain pipe. The invention also has the advantages of simple structure, convenient operation and easy implementation.

[0016] Compared with the prior art, the present invention also has the following advantages:

[0017] (1) The high-precision adjustable flow output device provided by the present invention can adjust the flow output within a certain range to meet the required output flow.

[0018] (2) The high-precision adjustable flow output device provided by the present invention is driven by a stepper motor or a servo motor, and can accurately control the output of the flow. The ordinary flow output counts the flow by the length of time. The present device can also count the number of revolutions of the stepper motor or servo motor, and has the advantage of high flow counting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the high-precision adjustable flow output device provided by the present invention.

[0020] Figure 2 It is a schematic diagram of the flow regulating structure provided by the present invention.

[0021] Figure 3 It is a structural schematic diagram of the one-way valve provided by the present invention.

[0022] Figure 4 It is a structural schematic diagram of the overflow valve provided by the present invention.

[0023] Description of the reference numerals in the above drawings:

[0024] 1-hydraulic cylinder, 2-check valve, 21-first valve body, 22-valve core, 23-first spring, 24-first check valve, 25-second check valve, 26-third check valve, 27-fourth check valve, 3-pipeline, 4-oil drain pipe, 5-connector, 6-overflow valve, 61-steel ball, 62-second valve body, 63-steel ball pressure block, 64-second spring, 65-spring pressure block, 7-hydraulic cylinder rod, 8-motor shaft, 9-turntable, 10-screw, 11-nut slider, 12-adjusting nut, 13-connecting rod, 14-piston, 15-oil suction pipe, 16-guide groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear and explicit, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0026] Embodiment 1:

[0027] like Figures 1 to 4 As shown, this embodiment discloses a high-precision adjustable flow output device, which mainly includes a hydraulic cylinder 1, a one-way valve group, a pipeline 3, a connecting rod 13, a motor, a rotating disk 9, a nut slider 11, an adjusting nut 12, and a screw 10. The hydraulic cylinder 1 includes a cylinder body, a piston 14, and a hydraulic cylinder rod 7. The one-way valve group includes at least four one-way valves 2, which are a first one-way valve 24, a second one-way valve 25, a third one-way valve 26, and a fourth one-way valve 27.

[0028] Specifically, the piston 14 is arranged in the cylinder body, can move in the cylinder body, and divides the cylinder body into two independent left and right working chambers. The hydraulic cylinder rod 7 passes through the cylinder body and the piston 14 rod, and is hinged to one end of the connecting rod 13, and drives the piston 14 to move in the cylinder body through the connecting rod 13. The input end of the first one-way valve 24 is connected to the left working chamber, and the output end is connected to the oil drain pipe 4 through the pipeline 3. The input end of the second one-way valve 25 is connected to the right working chamber, and the output end is connected to the oil drain pipe 4 through the pipeline 3. The input end of the third one-way valve 26 is connected to the oil suction pipe 15 through the pipeline 3, and the output end is connected to the left working chamber. The input end of the fourth one-way valve 27 is connected to the oil suction pipe 15 through the pipeline 3, and the output end is connected to the right working chamber.

[0029] Specifically, the motor is fixedly connected to the center of the turntable 9 through the motor shaft 8, and drives the turntable 9 to rotate. The turntable 9 is provided with a guide groove 16, and the guide groove 16 passes through the center of the turntable 9. The screw rod 10 is arranged in the guide groove 16, one end of which is fixed, and the other end is connected to the adjusting nut 12, and the screw rod 10 can be driven to rotate by the adjusting nut 12. The nut slider 11 is arranged on the screw rod 10, and the distance between the screw rod 10 and the center of the turntable 9 changes as the screw rod 10 rotates. The other end of the connecting rod 13 is rotatably connected to the nut slider 11.

[0030] Furthermore, the high-precision adjustable flow output device also includes a connector 5 for controlling the oil pressure at the end of the oil drain pipe 4 and a relief valve 6. One end of the connector 5 is connected to the oil drain pipe 4, and the other end is connected to the relief valve 6.

[0031] As a preferred embodiment of the present invention, the one-way valve 2 mainly includes a first valve body 21, a valve core 22 and a first spring 23. One end of the first valve body 21 is provided with an input port, and the other end is provided with an output port. One end of the valve core 22 abuts against the input port, and the other end abuts against the output port through the first spring 23.

[0032] As a preferred embodiment of the present invention, the overflow valve 6 mainly includes a second valve body 62, a spring pressure block 65, and a steel ball 61, a steel ball pressure block 63 and a second spring 64 arranged in the second valve body 62. The input end of the second valve body 62 is connected to the oil drain pipe 4, and the output end is connected to the outside or other pipelines. The spring pressure block 65 is installed at the end of the second valve body 62, opposite to the input end of the second valve body 62. The steel ball 61 is installed on the steel ball pressure block 63, and the steel ball pressure block 63 is pressed on the input end of the second valve body 62 by one end of the second spring 64. The other end of the second spring 64 abuts against the spring pressure block 65.

[0033] As a preferred solution of the present invention, the left and right working chambers adopt a symmetrical structural design.

[0034] As a preferred solution of the present invention, the motor is a stepper motor or a servo motor.

[0035] The working process and principle of the present invention are as follows: when working, the motor drives the turntable 9 to rotate, and the nut slider 11 attached to the turntable 9 rotates with the turntable 9, and at the same time drives the hydraulic cylinder rod 7 to move left and right through the connecting rod. When the hydraulic cylinder rod 7 moves to the left, the piston 14 compresses the left working chamber (the first one-way valve 24 and the fourth one-way valve 27 are opened, and the second one-way valve 25 and the third one-way valve 26 are closed) and the oil in the left working chamber enters the oil discharge pipe 4 through the first one-way valve 24, and the oil in the oil suction pipe 15 enters the right working chamber through the fourth one-way valve 27. When the hydraulic cylinder rod 7 moves to the right, the piston 14 compresses the right working chamber. The first one-way valve 24 and the fourth one-way valve 27 are closed, and the second one-way valve 25 and the third one-way valve 26 are opened, and the oil in the right working chamber enters the oil drain pipe 4 through the second one-way valve 25, and the oil in the oil suction pipe 15 enters the right working chamber through the third one-way valve 26; the piston 14 repeatedly compresses the working chamber to the left or right to achieve the stable flow output of the oil drain pipe 4, and by rotating the adjusting nut 12 and the screw rod 10, the position of the nut slider 11 on the screw rod 10 is changed, thereby changing the stroke range of the piston 14 moving back and forth in the first cylinder body, and finally achieving high-precision flow regulation of the oil drain pipe 4. The present invention also has the advantages of simple structure, convenient operation and easy implementation.

[0036] Embodiment 2:

[0037] This embodiment discloses an adjustable flow output device, which mainly includes:

[0038] The adjustable flow output device is driven by a motor, and the motor shaft 8 is installed at the rotation center of the turntable 9. The motor is a stepper motor or a servo motor to improve the accuracy of the output flow.

[0039] A guide groove 16 is provided on one side of the turntable 9, and a nut screw 10 mechanism is provided in the guide groove 16. The movement of the slider can be adjusted by the nut screw 10. When the screw 10 rotates, the nut can move along the guide groove 16 toward the center or edge of the turntable 9.

[0040] One end of the connecting rod 13 is connected to the slider and can rotate relatively, and the other end is connected to the hydraulic cylinder rod 7. When the motor drives the connecting rod 13 to move, the connecting rod 13 also drives the piston rod to move left and right. The flow control system is supplemented by 4 one-way valves 2 to realize the output of the liquid flow of the hydraulic cylinder 1.

[0041] The one-way valves 2 are one-way valves 2 with the same structure. The two one-way valves 2 on the hydraulic cylinder 1 have their valve cores 22 placed downward, while the two one-way valves 2 below the hydraulic cylinder 1 have their valve cores 22 placed upward.

[0042] The working chambers at the left and right ends of the adjustable flow output hydraulic cylinder 1 have a symmetrical structure, one end of which is hinged to the connecting rod 13 and can move relative to each other.

[0043] The output end of the adjustable flow output device is provided with a relief valve 6, and the relief valve 6 can set the outlet pressure to limit the outlet pressure within a certain range.

[0044] The two one-way valves 2 at the lower end of the hydraulic cylinder 1 of the adjustable flow output device are connected in parallel and connected to the oil suction pipe 15 to realize the oil suction function.

[0045] The two one-way valves 2 at the upper end of the hydraulic cylinder 1 of the adjustable flow output device are connected in parallel and connected to the oil discharge pipe 4 to realize the oil discharge function.

[0046] The adjustable flow output device is provided with a nut screw 10 mechanism, an adjustable nut 12, a nut in the screw 10 and a slider fixed on the nut. By rotating the screw 10, the slider on the nut can be driven to move toward the center of the turntable 9 or the edge of the turntable 9. The different positions of the slider on the turntable 9 can change the stroke of the hydraulic cylinder 1, and the flow size of a stroke cycle of the hydraulic cylinder 1 can be adjusted.

[0047] As a preferred solution of the present invention, the turntable 9 of the adjustable flow output device rotates at a constant speed to keep the flow output stable. When the flow output needs to be adjusted, the position of the slider is adjusted when the motor stops.

[0048] As a preferred solution of the present invention, the one-way valve 2 at the left or right end of the hydraulic cylinder 1 of the adjustable flow output device can share one opening of the hydraulic cylinder 1, and it is not necessary to have two openings on one side of the hydraulic cylinder 1.

[0049] As a preferred solution of the present invention, the pressure adjustment size of the overflow valve 6 of the adjustable flow output device needs to match the driving capacity of the motor to avoid insufficient or wasted motor capacity.

[0050] As a preferred embodiment of the present invention, the adjustable flow output device adjusts the flow output by the position of the slider on the turntable 9. The position of the slider is adjusted by the nut screw 10 mechanism. When accurate flow counting is performed, the slider position needs to be fixed, and the nut screw 10 has self-locking capability.

[0051] Furthermore, the oil inlet and the oil outlet of the adjustable flow output device are strictly distinguished.

[0052] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A high-precision adjustable flow output device, characterized in that: It includes a hydraulic cylinder, a one-way valve group, a pipeline, a connecting rod, a motor, a turntable, a nut slider, an adjusting nut, and a screw rod; the hydraulic cylinder includes a cylinder body, a piston, and a hydraulic cylinder rod; the one-way valve group includes at least four one-way valves, namely a first one-way valve, a second one-way valve, a third one-way valve, and a fourth one-way valve; The piston is arranged in the cylinder body and can move in the cylinder body, and divides the cylinder body into two independent left and right working chambers; the hydraulic cylinder rod passes through the cylinder body and the piston rod, and is hinged to one end of the connecting rod, and the piston is driven to move in the cylinder body through the connecting rod; the input end of the first one-way valve is connected to the left working chamber, and the output end is connected to the oil drain pipe through a pipeline; the input end of the second one-way valve is connected to the right working chamber, and the output end is connected to the oil drain pipe through a pipeline; the input end of the third one-way valve is connected to the oil suction pipe through a pipeline, and the output end is connected to the left working chamber; the input end of the fourth one-way valve is connected to the oil suction pipe through a pipeline, and the output end is connected to the right working chamber; The motor is fixedly connected to the center of the turntable through the motor shaft and drives the turntable to rotate; a guide groove is provided on the turntable, and the guide groove passes through the center of the turntable; the lead screw is arranged in the guide groove, one end of which is fixed and the other end is connected to the adjusting nut, and the lead screw can be driven to rotate by the adjusting nut; the nut slider is arranged on the lead screw, and the distance between the lead screw and the center of the turntable changes as the lead screw rotates; the other end of the connecting rod is rotatably connected to the nut slider.

2. The high-precision adjustable flow output device according to claim 1, characterized in that: It also includes a joint and an overflow valve for controlling the oil pressure at the end of the oil drain pipe; one end of the joint is connected to the oil drain pipe, and the other end is connected to the overflow valve.

3. The high-precision adjustable flow output device according to claim 1, characterized in that: The one-way valve comprises a first valve body, a valve core and a first spring; one end of the first valve body is provided with an input port, and the other end is provided with an output port; one end of the valve core abuts against the input port, and the other end abuts against the output port through the first spring.

4. The high-precision adjustable flow output device according to claim 2, characterized in that: The overflow valve includes a second valve body, a spring pressure block, and a steel ball, a steel ball pressure block and a second spring arranged in the second valve body; the input end of the second valve body is connected to the oil drain pipe, and the output end is connected to the outside world; the spring pressure block is installed at the end of the second valve body, opposite to the input end of the second valve body; the steel ball is installed on the steel ball pressure block, and the steel ball pressure block is pressed on the input end of the second valve body by one end of the second spring; the other end of the second spring abuts against the spring pressure block.

5. The high-precision adjustable flow output device according to claim 1, characterized in that: The left and right working chambers are designed with a symmetrical structure.

6. The high-precision adjustable flow output device according to claim 1, characterized in that: The motor is a stepper motor or a servo motor.

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