阅读说明：本技术 农机用多路油阀 (Multi-way oil valve for agricultural machinery ) 是由 李金鹏 于 2018-07-26 设计创作，主要内容包括：本发明公开了一种农机用多路油阀,包括阀体和阀杆,阀体上设有进油口、回油口和至少两个平行设置的阀杆腔,每个阀杆腔分别连通有左工作油口和右工作油口,在阀体上设有与各阀杆腔分别对应的单向阀；阀杆滑动安装于阀杆腔内,位于液压油流向首端的阀杆腔通过进油通道连通至进油口,相邻两个阀杆腔之间设有回油支通道,位于液压油流向末端的阀杆腔通过总回油通道连通至回油口；采用整体式构造,具有良好的密封性能,杜绝了阀体的渗油现象；油道结构相对简单,清洗简便,保证了油道内部的清洁；阀体内油道平直,减小了油阻,有助于减少液压油压力的损失,进而减小了液压油的发热率,且结构紧凑,体积和质量都有所改进,制造成本相应下降。(The invention discloses a multi-way oil valve for agricultural machinery, which comprises a valve body and a valve rod, wherein the valve body is provided with an oil inlet, an oil return port and at least two valve rod cavities which are arranged in parallel, each valve rod cavity is respectively communicated with a left working oil port and a right working oil port, and the valve body is provided with a one-way valve which is respectively corresponding to each valve rod cavity; the valve rod is slidably arranged in the valve rod cavity, the valve rod cavity positioned at the head end of the hydraulic oil flowing direction is communicated to the oil inlet through the oil inlet channel, an oil return branch channel is arranged between every two adjacent valve rod cavities, and the valve rod cavity positioned at the tail end of the hydraulic oil flowing direction is communicated to the oil return port through the main oil return channel; the valve adopts an integral structure, has good sealing performance and avoids the oil leakage phenomenon of the valve body; the oil duct has a relatively simple structure, is easy and convenient to clean, and ensures the cleanness of the interior of the oil duct; the oil duct in the valve body is straight, so that the oil resistance is reduced, the loss of hydraulic oil pressure is reduced, the heating rate of the hydraulic oil is further reduced, the structure is compact, the size and the quality are improved, and the manufacturing cost is correspondingly reduced.)

1. Multichannel fuel tap for agricultural machinery, including valve body and valve rod, be equipped with oil inlet and oil return opening on the valve body, the oil inlet with at least two parallel arrangement's valve rod chamber, its characterized in that have been arranged between the oil return opening: each valve rod cavity is communicated with a left working oil port and a right working oil port respectively, the left working oil port and the right working oil port are oppositely arranged on the valve body, and the valve body is provided with a one-way valve respectively corresponding to each valve rod cavity; the valve rod is respectively installed in the valve rod cavity in a sliding mode, the valve rod cavity located at the head end of the flowing direction of hydraulic oil is communicated to the oil inlet through an oil inlet channel, an oil return branch channel is arranged between every two adjacent valve rod cavities, and the valve rod cavity located at the tail end of the flowing direction of the hydraulic oil is communicated to the oil return port through a main oil return channel.

2. A multi-way oil valve for agricultural machinery according to claim 1, wherein: the valve rod cavity comprises a left oil return cavity, a left working cavity, a left control cavity, an oil inlet cavity, a middle oil return cavity, a right control cavity, a right working cavity and a right oil return cavity which are arranged in sequence, the left oil return cavity is communicated to the oil return port through a left oil return channel, the left working cavity is communicated to the left working oil port, a control oil duct is communicated between the left control cavity and the right control cavity and communicated to the oil inlet cavity, the check valve is positioned at the oil hole of the oil inlet cavity communicated with the control oil passage, the oil inlet cavity is communicated with the oil inlet channel, the middle oil return cavity positioned in the upstream valve rod cavity of the two adjacent valve rod cavities and used for flowing hydraulic oil to the upstream valve rod cavity is communicated with the oil inlet cavity positioned in the downstream valve rod cavity through the oil return branch channel, the right working cavity is communicated to the right working oil port, and the right oil return cavity is communicated to the oil return port through a right oil return channel.

3. A multi-way oil valve for agricultural machinery according to claim 2, wherein: the central line of the one-way valve mounting hole on the valve body is perpendicular to the central line of the oil inlet cavity.

4. A multi-way oil valve for agricultural machinery, according to claim 3, wherein: the control oil duct is arranged on a connecting line between the left working oil port and the right working oil port; the control oil duct comprises a transverse oil duct section, the two ends of the transverse oil duct section are respectively provided with a vertical oil duct section which is communicated with the right control cavity and the left control cavity, and arc angle transition is formed between the transverse oil duct section and the vertical oil duct section.

5. A multi-way oil valve for agricultural machinery as claimed in claim 1, 2, 3 or 4, wherein: the valve rod cavity is two, and the corresponding setting of valve rod is two.

6. A multi-way oil valve for agricultural machinery, according to claim 5, characterized in that: the valve body is provided with a safety oil hole which is communicated with the oil inlet and the oil return port, and a safety valve is arranged in the safety oil hole.

Technical Field

The invention relates to a valve body, in particular to a multi-path hydraulic oil valve used for an agricultural machinery hydraulic system.

Background

Disclosure of Invention

The invention aims to solve the technical problem of providing a multi-way oil valve for agricultural machinery, which has small volume and reliable overall performance.

In order to solve the technical problems, the technical scheme of the invention is as follows: the multi-way oil valve for the agricultural machinery comprises a valve body and a valve rod, wherein an oil inlet and an oil return port are arranged on the valve body, at least two valve rod cavities which are arranged in parallel are arranged between the oil inlet and the oil return port, each valve rod cavity is respectively communicated with a left working oil port and a right working oil port, the left working oil port and the right working oil port are oppositely arranged on the valve body, and a one-way valve which corresponds to each valve rod cavity is arranged on the valve body; the valve rod is respectively installed in the valve rod cavity in a sliding mode, the valve rod cavity located at the head end of the flowing direction of hydraulic oil is communicated to the oil inlet through an oil inlet channel, an oil return branch channel is arranged between every two adjacent valve rod cavities, and the valve rod cavity located at the tail end of the flowing direction of the hydraulic oil is communicated to the oil return port through a main oil return channel.

As a preferred technical solution, the valve rod cavity includes a left oil return cavity, a left working cavity, a left control cavity, an oil inlet cavity, a middle oil return cavity, a right control cavity, a right working cavity and a right oil return cavity, which are sequentially arranged, the left oil return cavity is communicated with the oil return port through a left oil return channel, the left working cavity is communicated with the left working oil port, a control oil channel is communicated between the left control cavity and the right control cavity, the control oil channel is communicated with the oil inlet cavity, the check valve is located at an oil hole where the oil inlet cavity is communicated with the control oil channel, the oil inlet cavity is communicated with the oil inlet channel, the middle oil return cavity in two adjacent valve rod cavities, which is located in the upstream of the hydraulic oil flow direction, is communicated with the oil inlet cavity in the downstream of the valve rod cavity through the oil return branch channel, and the right working cavity is communicated with the right working oil port, the right oil return cavity is communicated to the oil return port through a right oil return channel.

As a preferable technical scheme, the central line of the one-way valve mounting hole on the valve body is perpendicular to the central line of the oil inlet cavity.

As a preferred technical solution, the control oil passage is arranged on a connecting line between the left working oil port and the right working oil port; the control oil duct comprises a transverse oil duct section, the two ends of the transverse oil duct section are respectively provided with a vertical oil duct section which is communicated with the right control cavity and the left control cavity, and arc angle transition is formed between the transverse oil duct section and the vertical oil duct section.

In a preferred embodiment, there are two valve rod cavities, and there are two valve rods.

As a preferred technical scheme, a safety oil hole for communicating the oil inlet and the oil return opening is formed in the valve body, and a safety valve is installed in the safety oil hole.

Due to the adoption of the technical scheme, the multi-way oil valve for the agricultural machinery comprises a valve body and a valve rod, wherein an oil inlet and an oil return port are formed in the valve body, at least two valve rod cavities which are arranged in parallel are arranged between the oil inlet and the oil return port, each valve rod cavity is respectively communicated with a left working oil port and a right working oil port, the left working oil port and the right working oil port are oppositely arranged on the valve body, and a check valve which corresponds to each valve rod cavity is arranged on the valve body; the valve rods are respectively installed in the valve rod cavities in a sliding mode, the valve rod cavity located at the head end of the flowing direction of hydraulic oil is communicated to the oil inlet through an oil inlet channel, an oil return branch channel is arranged between every two adjacent valve rod cavities, and the valve rod cavity located at the tail end of the flowing direction of the hydraulic oil is communicated to the oil return port through a main oil return channel; the invention has the beneficial effects that: the integral structure is adopted, the sealing performance is good, and the oil leakage phenomenon of the valve body is avoided; the structure of the oil duct is relatively simple, the cleaning is simple and convenient, and the cleanness of the interior of the oil duct is ensured; the oil duct in the valve body is straight, so that the oil resistance is reduced, the loss of hydraulic oil pressure is reduced, the heating rate of the hydraulic oil is further reduced, the structure is compact, the size and the quality are improved, and the manufacturing cost is correspondingly reduced.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic view of an embodiment of the present invention with the valve stem removed;

FIG. 2 is a schematic illustration of the structure of a valve stem according to an embodiment of the present invention;

FIG. 3 is a side view of an embodiment of the present invention;

FIG. 4 is a schematic structural view of an embodiment of the present invention in a neutral position;

FIG. 5 is a schematic structural view of an embodiment of the present invention in a right turn position;

FIG. 6 is a schematic structural view of an embodiment of the present invention in a left turn position;

in the figure: 1-a valve body; 2-a valve stem; 3-an oil inlet; 4-an oil return port; 5-a valve stem cavity; 51-left oil return chamber; 52-left working chamber; 53-left control chamber; 54-oil inlet chamber; 55-middle oil return cavity; 56-right control chamber; 57-right working chamber; 58-right oil return cavity; 59-left oil return passage; 510-right oil return passage; 6-a left working oil port; 7-right working oil port; 8-a one-way valve; 9-an oil inlet channel; 10-total oil return passage; 11-oil return branch channel; 12-a transverse oil duct section; 13-a vertical oil duct section; 14-a relief oil hole; 15-safety valve.

Detailed Description

The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1, 2 and 3, the multi-way oil valve for agricultural machinery comprises a valve body 1 and a valve rod 2, wherein the valve body 1 is provided with an oil inlet 3 and an oil return port 4, at least two valve rod cavities 5 arranged in parallel are arranged between the oil inlet 3 and the oil return port 4, in this embodiment, according to actual use requirements, the number of the valve rod cavities 5 is two, the number of the valve rods 2 is correspondingly two, each valve rod cavity 5 is respectively communicated with a left working oil port 6 and a right working oil port 7, the left working oil port 6 and the right working oil port 7 are oppositely arranged on the valve body 1, and the valve body 1 is provided with a check valve 8 corresponding to each valve rod cavity 2, so as to ensure that the agricultural machinery is controlled to safely steer; the valve rods 2 are respectively installed in the valve rod cavities 5 in a sliding mode, the valve rod cavities 5 located at the head ends of the flowing direction of hydraulic oil are communicated to the oil inlet 3 through oil inlet channels 9, an oil return branch channel 11 is arranged between every two adjacent valve rod cavities 5, and the valve rod cavities 5 located at the tail ends of the flowing direction of the hydraulic oil are communicated to the oil return port 4 through a main oil return channel 10.

The valve rod cavity 5 of the present embodiment includes a left oil return cavity 51, a left working cavity 52, a left control cavity 53, an oil inlet cavity 54, a middle oil return cavity 55, a right control cavity 56, a right working cavity 57 and a right oil return cavity 58, which are sequentially arranged, the left oil return cavity 51 is communicated to the oil return port 4 through a left oil return channel 59, the left working cavity 52 is communicated to the left working oil port 6, a control oil channel is communicated between the left control cavity 53 and the right control cavity 56, the control oil channel is communicated to the oil inlet cavity 54, the check valve 8 is located at an oil hole where the oil inlet cavity 54 is communicated to the control oil channel, the oil inlet cavity 54 is communicated to the oil inlet channel 9, the middle oil return cavity 55 of two adjacent valve rod cavities, which is located at the position where hydraulic oil flows upstream to the valve rod cavity 2, is communicated to the oil inlet cavity 54 of the valve rod cavity 2 through the oil return branch channel 11, the right working cavity 57 is communicated to the right working oil port 7, and the right oil return cavity 58 is communicated to the oil return port 7 through a right oil return channel 810.

The center line of the mounting hole of the check valve 8 on the valve body is perpendicular to the center line of the oil inlet cavity 54, so that the circulation distance of hydraulic oil between the check valve 8 and the valve rod cavity 5 is reduced, the length of the whole oil passage is favorably shortened, and the pressure loss of the hydraulic oil is further reduced.

The control oil duct is arranged on a connecting line between the left working oil port 6 and the right working oil port 7; the control oil duct comprises a transverse oil duct section 12, two ends of the transverse oil duct section 12 are respectively communicated with a right control cavity 56 and a vertical oil duct section 13 of a left control cavity 53, the transverse oil duct section 12 and the vertical oil duct section 13 are in arc angle transition, so that when hydraulic oil flows from the check valve 8 to the left control cavity 53 or the right control cavity 56, a flow path line of the hydraulic oil is linear as much as possible, the flow distance of the hydraulic oil is shortened to the greatest extent, the resistance of the oil duct with the structure to the hydraulic oil is small, the hydraulic loss is reduced as much as possible, the oil temperature rising speed is reduced, and the performance of the valve body 1 is improved.

In order to improve the use safety, the valve body 1 is provided with a safety oil hole 14 communicated with the oil inlet 3 and the oil return port 4, and a safety valve 15 is installed in the safety oil hole 14.

The working process of this embodiment is as follows:

as shown in fig. 4, when the valve rod 2 is in the neutral (middle) position, the hydraulic oil in the oil inlet channel 9 directly flows to the oil return port 4 through the oil inlet cavity 54, the middle oil return cavity 55 and the oil return branch channel 11, so that the oil body does not generate high pressure, the valve rod 2 respectively seals the left control cavity 53 and the right control cavity 56, no hydraulic oil flows through the left working oil port 6 and the right working oil port 7, and the reversing valve does not perform reversing action.

As shown in fig. 5, when the valve rod 2 is at the right reversing position, the high-pressure oil in the oil inlet channel 9 opens the check valve 8 and sequentially enters the right working oil port 7 through the control oil passage, the right control chamber 56 and the right working chamber 57, the valve rod 2 closes the left control chamber 53, the left working chamber 52 and the left working oil port 6, and the hydraulic oil in the left working oil port 6 flows back to the oil return port 4 through the left working chamber 52 and the left oil return channel 59, so that the safe one-way reversing is realized.

As shown in fig. 6, when the valve rod 2 is at the left reversing position, the high-pressure oil in the oil inlet channel 9 opens the check valve 8 and sequentially enters the left working oil port 6 through the control oil passage, the left control cavity 53 and the left working cavity 52, the valve rod 2 closes the right control cavity 56, the right working cavity 57 and the right working oil port 7, and the hydraulic oil in the right working oil port 7 flows back to the oil return port 4 through the right working cavity 57 and the right oil return channel 510, so that the safe one-way reversing is realized.

The embodiment has the following advantages:

1. compared with the one-way valve cavity structure arranged in the prior art, the one-way valve cavity structure directly supplies oil to the one-way valve from the valve rod cavity, and reduces a layer of oil duct, thereby reducing the volume and the weight of the whole valve body and reducing the casting difficulty.

2. The direction of the transverse channel section of the control oil channel is on the connecting line of the left working oil port and the right working oil port, and the mounting hole of the check valve is vertically communicated with the oil inlet channel of the valve rod cavity, so that the flowing distance of hydraulic oil is reduced.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.