Independent single body lower pressure control hydraulic system and seeding machine

Abstract

The utility model relates to an independent monomer down pressure control hydraulic system and a seeder, which comprise a main control valve, an energy accumulator and at least one pressure control hydraulic unit, an oil outlet on the main control valve is communicated with one end of an oil supply pipeline, an oil return port on the main control valve is communicated with one end of an oil return pipeline, and the energy accumulator is communicated with the oil supply pipeline; each pressure control hydraulic unit comprises a pressure valve, a proportional valve and an oil cylinder, the proportional valve is provided with a third connector, a fourth connector and a fifth connector, and the fourth connector can be communicated with the third connector or the fifth connector; a first connector on the pressure valve is communicated with the other end of the oil supply pipeline, and a second connector on the pressure valve is communicated with a rod cavity of the oil cylinder through a pipeline. The fourth connector is communicated with a rodless cavity of the oil cylinder through a pipeline, and the fifth connector is communicated with one end of an oil return pipeline. The third connector is communicated with a first spring connector at one end of the pressure valve through a pipeline. The main control valve of the tractor is adopted to control the lower pressure of the independent single body of the seeder, remote operation is achieved, and convenience and rapidness are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sowing machine technical field, concretely relates to an independent monomer down pressure control hydraulic system and sowing machine. BACKGROUND

[0002] With the wide application of sowing machine, the technical platform of sowing machine is gradually raised, not only the accuracy of sowing is required, and the auxiliary function of sowing is also increasingly rich, for example, fan, down pressure, sowing amount, marking machine, supporting wheel, side wing folding and the like. CONTENT

[0003] The utility model provides an independent monomer down pressure control hydraulic system and sowing machine, aim at solving the problem in prior art.

[0004] The utility model solves the technical problem of the foregoing technical scheme as follows:

[0005] An independent monomer down pressure control hydraulic system, including main control valve, energy accumulator and at least one pressure control hydraulic unit, be equipped with oil outlet and oil return on the main control valve, the oil outlet communicates with one end of oil supply pipeline, the oil return communicates with one end of oil return pipeline, the energy accumulator communicates with the oil supply pipeline;

[0006] Each pressure control hydraulic unit includes pressure valve, proportional valve and oil cylinder, and the pressure valve is equipped with interface one and interface two that are mutually communicated or disconnected, the proportional valve is equipped with interface three, interface four and interface five, and the interface four can be communicated with the interface three or the interface five;

[0007] The interface one communicates with the other end of the oil supply pipeline, and the interface two communicates with the rod cavity of the oil cylinder through a pipeline, the interface four communicates with the rodless cavity of the oil cylinder through a pipeline, and the interface five communicates with one end of the oil return pipeline, the interface three communicates with spring interface one at one end of the pressure valve through a pipeline, and spring interface two at the other end of the pressure valve communicates with the part close to the other end of the oil return pipeline through a pipeline.

[0008] The utility model has the advantages that in the operation process, by operating the main control valve, pressure oil fills the energy accumulator, then passes through the pressure valve, and pressure oil forces the pressure valve to overcome the spring force to change direction on one way, switches to the oil way above, makes it in the open state, reaches the proportional valve on the other way, reaches the large cavity of the oil cylinder after passing through the proportional valve, and the oil cylinder starts to move on the net, and the oil in the small cavity returns to the large cavity through the pressure valve, so that the oil cylinder moves quickly, and the operation is more convenient.

[0009] The utility model realizes the remote operation, and is convenient and fast by adopting the tractor main control valve to realize the independent monomer down pressure control function of sowing machine.

[0010] On the basis of the above technical solutions, the utility model further can make improvement as follows.

[0011] Further, each pressure control hydraulic unit further comprises an electromagnetic valve A, which is fixedly installed on the oil supply pipeline and located between the accumulator and the pressure valve.

[0012] The beneficial effect of the above further scheme is simple structure and reasonable design, and oil liquid reaches the pressure valve through the electromagnetic valve A, and the pipeline is locked by the electromagnetic valve A when the oil cylinder is adjusted to the set position.

[0013] Further, each pressure control hydraulic unit further comprises an electromagnetic valve B, which is fixedly installed on the oil return pipeline.

[0014] The beneficial effect of the above further scheme is simple structure and reasonable design, and the oil return is controlled by the electromagnetic valve B.

[0015] Further, a pressure reducing valve is further included, which is fixedly installed on the oil supply pipeline and located between the accumulator and one end of the oil supply pipeline.

[0016] The beneficial effect of the above further scheme is simple structure and reasonable design, and the pressure in the oil supply pipeline is adjusted by the pressure reducing valve to avoid excessive pressure.

[0017] Further, the spring interface at one end of the pressure reducing valve is communicated with the oil return pipeline through a pipeline.

[0018] The beneficial effect of the above further scheme is simple structure and reasonable design, and the pressure in the oil supply pipeline and the oil return pipeline is adjusted by the pressure reducing valve to avoid excessive pressure.

[0019] Further, the pipeline communicated between the interface two and the rodless cavity of the oil cylinder is communicated with the pipeline communicated between the interface four and the rodless cavity of the oil cylinder through an oil supplement pipeline, and a one-way valve is fixedly installed on the oil supplement pipeline.

[0020] The beneficial effect of the above further scheme is simple structure and reasonable design, and the oil cylinder is supplemented with oil liquid through the oil supplement pipeline when the oil cylinder is retracted to avoid rapid descent of the oil cylinder.

[0021] Further, the pressure valve is a two-position two-way valve.

[0022] The beneficial effect of the above further scheme is that the pressure valve adopts a two-position two-way valve, which is reasonable in structure, fast in response speed and energy-saving.

[0023] Further, the proportional valve is a two-position three-way valve.

[0024] The beneficial effect of the further scheme is that the proportional valve is a two-position three-way valve, which is reasonable in structure, flexible in control and energy-saving.

[0025] Further, the number of the pressure control hydraulic units is multiple, and the multiple pressure control hydraulic units are distributed in parallel.

[0026] The beneficial effect of the further scheme is that the structure is simple, the number of the pressure control hydraulic units is reasonable, the control is flexible, and the operation is convenient.

[0027] The utility model also relates to a seeding machine, including the independent monomer lower pressure control hydraulic system as described above.

[0028] The beneficial effect of the further scheme is that the utility model also provides a seeding machine, which realizes the independent monomer lower pressure control function of the seeding machine by adopting the tractor main control valve, realizes remote operation and is convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 It is the principle drawing of the utility model;

[0030] Fig. 2 It is the principle drawing of the utility model when the oil cylinder is in the state of extension;

[0031] Fig. 3 It is the principle drawing of the utility model when the oil cylinder is in the state of retraction;

[0032] Fig. 4 It is the principle drawing of the utility model when the oil cylinder is in the state of locking.

[0033] In the drawings, the component list represented by each sign is as follows:

[0034] 1, main control valve;2, pressure reducing valve;3, energy accumulator;4, electromagnetic valve A;5, electromagnetic valve B;6, pressure valve;7, proportional valve;8, oil cylinder. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0036] In the description of the utility model, it needs to be understood that, the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0037] In the description of the utility model, it needs to be understood that, the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0038] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0039] Embodiment 1

[0040] As Figs. 1 to 4 Indicated, the utility model provides a kind of independent monomer down pressure control hydraulic system, including main control valve 1, energy accumulator 3 and at least one pressure control hydraulic unit, the outlet of the main control valve 1 is equipped with and oil return port, the outlet is communicated with the one end of oil supply line, the oil return port is communicated with the one end of oil return line, the energy accumulator 3 is communicated with the oil supply line;

[0041] Each pressure control hydraulic unit includes pressure valve 6, proportional valve 7 and oil cylinder 8, the interface one and interface two of the pressure valve 6 are equipped with and are communicated or disconnected;The interface three, interface four and interface five are equipped on the proportional valve 7, the interface four can be communicated with the interface three or the interface five;

[0042] The interface one is communicated with the other end of the oil supply pipeline, the interface two is communicated with the rod cavity of the oil cylinder 8 through a pipeline, the interface four is communicated with the rodless cavity of the oil cylinder 8 through a pipeline, the interface five is communicated with one end of the oil return pipeline, the interface three is communicated with the spring interface one at one end of the pressure valve 6 through a pipeline, and the spring interface two at the other end of the pressure valve 6 is communicated with the oil return pipeline close to the other end of the oil return pipeline through a pipeline.

[0043] During operation, by operating the main control valve 1, the pressure oil is filled into the accumulator 3, and then passes through the pressure valve 6, so that the pressure oil forces the pressure valve 6 to reverse against the spring force, switches to the upper oil way, and makes the pressure valve 6 in an open state. In addition, the pressure oil reaches the proportional valve 7, passes through the proportional valve 7, and reaches the large cavity of the oil cylinder 8, so that the oil cylinder 8 starts to move on the network, and the oil in the small cavity returns to the large cavity through the pressure valve 6, so that the oil cylinder 8 moves quickly, and operation is more convenient.

[0044] It should be noted that the main control valve 1, the accumulator 3, the pressure valve 6, the proportional valve 7 and the oil cylinder 8 are respectively adopted in the prior art, and the specific structure and principle will not be described here.

[0045] The embodiment realizes the pressure control function of the seeder independent single body by adopting the tractor main control valve, realizes remote operation, and is convenient and fast.

[0046] Embodiment 2

[0047] On the basis of embodiment 1, each pressure control hydraulic unit in the embodiment further includes an electromagnetic valve A4, which is fixedly installed on the oil supply pipeline and located between the accumulator 3 and the pressure valve 6.

[0048] The scheme is simple in structure and reasonable in design, the oil reaches the pressure valve 6 through the electromagnetic valve A4, and when the oil cylinder 8 is adjusted to the set position, the pipeline is locked by using the electromagnetic valve A4.

[0049] Embodiment 3

[0050] On the basis of the above-mentioned embodiments, each pressure control hydraulic unit in the embodiment further includes an electromagnetic valve B5, which is fixedly installed on the oil return pipeline.

[0051] The scheme is simple in structure and reasonable in design, and the oil return is controlled by using the electromagnetic valve B5.

[0052] Embodiment 4

[0053] On the basis of the above-mentioned embodiments, the embodiment further includes a pressure reducing valve 2, which is fixedly installed on the oil supply pipeline and located between the position corresponding to the accumulator 3 and one end of the oil supply pipeline.

[0054] The scheme has simple structure and reasonable design, and utilizes the pressure reducing valve 2 to adjust the pressure in the oil supply pipeline, so as to avoid excessive pressure.

[0055] Embodiment 5

[0056] In the embodiment based on the embodiment 4, the spring interface at one end of the pressure reducing valve 2 is communicated with the oil return pipeline through a pipeline.

[0057] The scheme has simple structure and reasonable design, and utilizes the pressure reducing valve 2 to adjust the pressure in the oil supply pipeline and the oil return pipeline, so as to avoid excessive pressure.

[0058] Embodiment 6

[0059] In the embodiment based on the above-mentioned embodiments, the pipeline communicated between the interface two and the rodless cavity of the oil cylinder 8 is communicated with the pipeline communicated between the interface four and the rodless cavity of the oil cylinder 8 through an oil supplement pipeline, and a one-way valve is fixedly installed on the oil supplement pipeline.

[0060] The scheme has simple structure and reasonable design, and utilizes the oil supplement pipeline to supplement the oil cylinder 8 when the oil cylinder 8 is retracted, so as to avoid the oil cylinder 8 from descending too fast.

[0061] Embodiment 7

[0062] In the embodiment based on the above-mentioned embodiments, the pressure valve 6 is a two-position two-way valve.

[0063] The two-position two-way valve is more reasonable, has simple structure, fast response speed and energy saving.

[0064] Embodiment 8

[0065] In the embodiment based on the above-mentioned embodiments, the proportional valve 7 is a two-position three-way valve.

[0066] The two-position three-way valve is more reasonable, has simple structure, flexible control and energy saving.

[0067] Embodiment 9

[0068] In the embodiment based on the above-mentioned embodiments, the number of the pressure control hydraulic units is multiple, and the multiple pressure control hydraulic units are distributed in parallel.

[0069] The scheme has simple structure, reasonable number of pressure control hydraulic units, flexible control and convenient operation.

[0070] Embodiment 10

[0071] In the embodiment based on the above-mentioned embodiments, a seeding machine is further provided, which comprises the independent single pressure control hydraulic system as described above.

[0072] The embodiment also provides a seeder, which realizes independent single unit down pressure control function of the seeder by adopting a tractor main control valve, and realizes remote operation, which is convenient and fast.

[0073] The working principle of the utility model is as follows:

[0074] (1) Oil cylinder extension state:

[0075] At this time, the electromagnetic valve A4, the electromagnetic valve B5 and the proportional valve 7 are electrified. By operating the tractor main control valve 1, the pressure oil is filled to the accumulator 3 after passing through the pressure reducing valve 2, then reaches the pressure valve 6 of the uppermost group through the electromagnetic valve A4, and the pressure oil forces the pressure valve 6 to switch to the upper oil circuit to be in the open state by overcoming the spring force. The other way reaches the proportional valve 7, and then reaches the large cavity of the oil cylinder 8 after passing through the proportional valve, so that the oil cylinder 8 starts to move on the net, and the oil in the small cavity returns to the large cavity through the pressure valve 6, so that the oil cylinder moves quickly.

[0076] (2) Oil cylinder retraction state:

[0077] At this time, the electromagnetic valve A4 and the electromagnetic valve B5 are electrified, and the proportional valve is not electrified. By operating the tractor main control valve 1, the pressure oil is filled to the accumulator 3 after passing through the pressure reducing valve 2, then reaches the pressure valve 6 of the uppermost group through the electromagnetic valve A4, and the pressure oil forces the pressure valve 6 to switch to the upper oil circuit to be in the open state by overcoming the spring force. The pressure oil reaches the small cavity of the oil cylinder 8, and the oil cylinder 8 starts to move downward, and the oil in the large cavity returns to the electromagnetic valve B through the proportional valve 7, and then reaches the tractor main control valve 1 to return to the oil tank.

[0078] (3) Oil cylinder locking state:

[0079] When the supporting wheel is adjusted to the position, the tractor main control valve 1 is operated to the middle position, and the electromagnetic valve A4, the electromagnetic valve B5 are electrified, and the proportional valve 7 is not electrified. The one-way valves built in the electromagnetic valve A4 and the electromagnetic valve B5 close the large and small cavities of the oil cylinder 8, and are not affected by external pressure impact, so that they are completely in the locking state and remain stationary.

[0080] The advantages of the utility model are as follows:

[0081] 1. The tractor main control valve is adopted to realize the independent single unit down pressure control function of the seeder;

[0082] 2. The electro-hydraulic control mode is adopted to realize remote operation, which is convenient and fast;

[0083] 3. The position control of the independent single unit down pressure control is realized by adopting the logical control between elements;

[0084] 4. By using a special hydraulic locking structure, independent single down pressure control position locking is realized.

[0085] It should be noted that the arrows in the drawings only refer to the path of the oil flow, and have no other substantive meaning.

[0086] In addition, all the electronic components involved in the utility model are existing technologies, and the above-mentioned components are electrically connected with the controller, and the control circuit between the controller and the components is an existing technology.

[0087] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0088] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

[0089] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An independent single unit downforce control hydraulic system characterized by: The hydraulic system comprises a main control valve (1), an accumulator (3) and at least one pressure control hydraulic unit, the main control valve (1) is provided with an oil outlet and an oil return port, the oil outlet is communicated with one end of an oil supply pipeline, the oil return port is communicated with one end of an oil return pipeline, the accumulator (3) is communicated with the oil supply pipeline; Each pressure control hydraulic unit comprises a pressure valve (6), a proportional valve (7) and a cylinder (8), the pressure valve (6) is provided with an interface one and an interface two which are communicated or disconnected with each other; the proportional valve (7) is provided with an interface three, an interface four and an interface five, the interface four can be communicated with the interface three or the interface five; The interface one is communicated with the other end of the oil supply pipeline, the interface two is communicated with a rod cavity of the cylinder (8) through a pipeline; the interface four is communicated with a rodless cavity of the cylinder (8) through a pipeline, the interface five is communicated with one end of the oil return pipeline; the interface three is communicated with a spring interface one at one end of the pressure valve (6) through a pipeline, a spring interface two at the other end of the pressure valve (6) is communicated with a part of the oil return pipeline close to the other end thereof through a pipeline.

2. The independent single unit downforce control hydraulic system of claim 1, wherein: Each pressure control hydraulic unit further comprises an electromagnetic valve A (4), the electromagnetic valve A (4) is fixedly installed on the oil supply pipeline, and is located between the accumulator (3) and the pressure valve (6).

3. The independent single unit downforce control hydraulic system of claim 1, wherein: Each pressure control hydraulic unit further comprises an electromagnetic valve B (5), the electromagnetic valve B (5) is fixedly installed on the oil return pipeline.

4. The independent single unit downforce control hydraulic system of claim 1, wherein: Further comprising a pressure reducing valve (2), the pressure reducing valve (2) is fixedly installed on the oil supply pipeline, and is located between the part of the oil supply pipeline corresponding to the accumulator (3) and one end of the oil supply pipeline.

5. The independent single unit downforce control hydraulic system of claim 4, wherein: A spring interface at one end of the pressure reducing valve (2) is communicated with the oil return pipeline through a pipeline.

6. The independent single-mandrel downforce control hydraulic system of any one of claims 1-5, wherein: The pipeline communicated between the interface two and the rod cavity of the cylinder (8) is communicated with the pipeline communicated between the interface four and the rodless cavity of the cylinder (8) through a supplementary oil pipeline, and a one-way valve is fixedly installed on the supplementary oil pipeline.

7. The independent single-mandrel downforce control hydraulic system of any one of claims 1-5, wherein: The pressure valve (6) is a two-position two-way valve.

8. The independent single-mandrel downforce control hydraulic system of any one of claims 1-5, wherein: The proportional valve (7) is a two-position three-way valve.

9. The independent single-mandrel downforce control hydraulic system of any one of claims 1-5, wherein: The number of the pressure control hydraulic units is multiple, and the multiple pressure control hydraulic units are distributed in parallel.

10. A planter characterized by: The hydraulic system comprises the independent single pressure control hydraulic system according to any one of claims 1-9.

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