CN117189707A - Electromagnetic reversing multi-way valve for paddy field tractor - Google Patents
Electromagnetic reversing multi-way valve for paddy field tractor Download PDFInfo
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- CN117189707A CN117189707A CN202311461247.9A CN202311461247A CN117189707A CN 117189707 A CN117189707 A CN 117189707A CN 202311461247 A CN202311461247 A CN 202311461247A CN 117189707 A CN117189707 A CN 117189707A
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- 239000010720 hydraulic oil Substances 0.000 description 28
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Abstract
The invention relates to the technical field of valve groups, in particular to an electromagnetic reversing multiway valve for a paddy field tractor, which comprises a hydraulic valve, a reversing valve group, a first working oil way, a second working oil way, a third working oil way, a fourth working oil way, a fifth working oil way, a sixth working oil way, an electromagnetic valve and a shell, wherein the electromagnetic reversing multiway valve can realize the lifting and other actions of an external accessory by only providing an electric signal for the electromagnetic multiway valve, and the multiway valve is not required to be reversed by operating a mechanical handle, so that the work of the accessory is controlled, an operator is liberated from heavy mechanical labor, the working efficiency is improved, and the problems of low production efficiency and higher labor intensity of the operator caused by low manual operation as a main part in a hydraulic system of the traditional paddy field tractor are solved.
Description
Technical Field
The invention relates to the technical field of valve groups, in particular to an electromagnetic reversing multiway valve for a paddy field tractor.
Background
The paddy field cultivation area of China is about one fourth of the total cultivation area of China, and the paddy field tractor has wide use requirements. Compared with a dry land tractor, the special working environment of the paddy field tractor has higher requirements on a hydraulic system. At present, most hydraulic lifting systems of paddy field tractors still mainly operate by manual multi-way valves, so that the electromagnetic automation degree is low, the production efficiency is low and the labor intensity of operators is high.
At present, the hydraulic system for mechanical operation of paddy field tractors is obviously not in accordance with the time requirements of agricultural machinery development by the intelligent, automatic and the like of the agricultural machinery equipment driven by the China. The electromagnetic multi-way valve reversing valve capable of meeting various paddy field working conditions and adapting to complex working environments solves the requirement, can greatly improve the automation degree of paddy field tractors, improves the productivity and reduces the working intensity.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the electromagnetic reversing multiway valve for the paddy field tractor, which can realize the electromagnetic automatic control of actions such as lifting and lowering of external accessories only by providing an electric signal for the electromagnetic multiway valve, does not need to operate a mechanical handle to reverse the multiway valve any more, controls the work of the accessories, releases an operator from heavy mechanical labor, improves the working efficiency, and solves the problems of low production efficiency and higher labor intensity of the operator caused by low electromagnetic automation degree due to manual operation in a hydraulic system of the traditional paddy field tractor.
The technical scheme adopted by the invention for solving the technical problems is that the electromagnetic reversing multiway valve for the paddy field tractor comprises a hydraulic valve, wherein an oil inlet passage P is arranged at a position, close to the rear side, of the middle part of the upper end of the hydraulic valve, an oil return passage T is arranged at a position, close to the front side, of the middle part of the upper end of the hydraulic valve, and the electromagnetic reversing multiway valve also comprises a reversing valve group, wherein the reversing valve group is formed by connecting three electromagnetic reversing valves in series, the reversing valve group is fixedly arranged on the left side of the hydraulic valve, an oil inlet of the hydraulic valve is communicated with an oil inlet of the right electromagnetic reversing valve, and an oil outlet of the hydraulic valve is communicated with the right electromagnetic reversing valve;
the first working oil way and the second working oil way are communicated with the first working oil way at the position, close to the front side, of the middle part of the upper end of the electromagnetic reversing valve on the right side, and the second working oil way is communicated with the position, close to the rear side, of the middle part of the upper end of the electromagnetic reversing valve on the right side;
the middle part of the upper end of the electromagnetic reversing valve in the middle is communicated with the working oil way III, and the middle part of the upper end of the electromagnetic reversing valve in the middle is communicated with the working oil way IV;
the electromagnetic valve is fixedly arranged at the upper end of the electromagnetic reversing valve positioned at the left side, and an oil inlet and an oil outlet of the electromagnetic valve are corresponding to and communicated with the oil inlet and the oil outlet of the electromagnetic reversing valve at the left side;
the working oil way five and the working oil way six are communicated with the position, close to the front side, of the middle part of the upper end of the electromagnetic valve, and the position, close to the rear side, of the middle part of the upper end of the electromagnetic valve is communicated with the working oil way six.
Preferably, the hydraulic valve is an electromagnetic one-way valve, when electricity is obtained, the oil inlet of the hydraulic valve is communicated with the oil inlet passage, and when electricity is lost, the oil inlet of the hydraulic valve is closed, and the oil outlet of the hydraulic valve is communicated with the oil return passage.
Preferably, the electromagnetic reversing valve is a normally closed three-position four-way electromagnetic valve, when power is lost, the oil inlet of the electromagnetic reversing valve is closed, the oil outlet of the electromagnetic reversing valve is communicated with the oil return passage, and when power is obtained, the oil inlet of the electromagnetic reversing valve is communicated with the corresponding working oil passage.
Preferably, the electromagnetic reversing valve comprises a valve body, a valve core is arranged in the valve body, movable rods are fixedly connected to the front end and the rear end of the valve core, valve core springs are sleeved on the movable rods between the valve body and the valve core, electromagnets are arranged at the front end and the rear end of the valve body, an electromagnetic coil I is wound on the outer side of each electromagnet, and a junction box I is arranged at the upper ends of the front side and the rear side of the valve body.
Preferably, the two sides of the valve core are Y-shaped, and the middle part is O-shaped.
Preferably, an oil through port is formed between the inner walls of the valve body at the upper end of the electromagnetic reversing valve, and hydraulic locking assemblies are symmetrically arranged on the opposite sides of the oil through port.
Preferably, the hydraulic locking assembly comprises a spring seat, the oil through hole is provided with the spring seat in a sliding manner on the opposite side, a plug screw is slidably arranged in the spring seat through a locking spring, the plug screw is fixedly connected with the end head of the locking spring, an electromagnetic push rod is arranged on the outer side of the spring seat, an electromagnetic coil II is coated on the outer side of the electromagnetic push rod, and a junction box II is arranged above the electromagnetic coil II.
Preferably, the electromagnetic valve is a normally-closed direct-acting two-position two-way electromagnetic valve, when power is lost, the oil inlet of the electromagnetic valve is closed, and when power is obtained, the oil inlet of the electromagnetic valve is opened and communicated with a corresponding working oil way.
Preferably, the first electromagnetic coil and the second electromagnetic coil are both provided with manual emergency buttons, and meanwhile, the coils are provided with protective caps.
Preferably, the hydraulic valve and the reversing valve group are arranged in the shell, the shell comprises a bottom plate, the hydraulic valve and the reversing valve group are fixedly arranged in a mounting groove formed in the upper end of the bottom plate, a top plate is arranged above the hydraulic valve and the reversing valve group, pipeline slots corresponding to the working oil ways are formed in the top plate from front to back, elastic side plates are fixedly arranged at the lower ends of the left side and the right side of the top plate, handles are fixedly arranged at the positions, close to the lower ends, of the middle parts of the side walls of the elastic side plates, opposite to each other, of the elastic side plates, inserting plates are fixedly connected with inserting plates, clamping grooves are symmetrically formed in the left side and the right side of the bottom plate, buffer springs are uniformly arranged in the middle parts of the opposite side walls of the elastic side plates from front to back, and end fixing connection limiting plates of the buffer springs, which are far away from the elastic side plates, are fixedly connected with limiting plates.
The invention has the beneficial effects that:
1. the invention can realize full electromagnetic operation of the paddy field tractor and electromechanical integrated multi-way valve control, and has higher automation degree, lower operation intensity and improved production efficiency compared with the traditional manual operation control.
2. The invention can realize the ascending, middle position, descending and floating control of the accessory by controlling the logic sequence of each valve through the electromagnetic valve, wherein the electromagnetic valve is a normally closed two-position two-way electromagnetic valve, has the advantages of high flow, strong pollution resistance and good pressure maintaining performance, and meanwhile, the electromagnetic reversing valve is also provided with a hydraulic locking assembly, so that the oil pressure in an oil way can be controlled in real time.
3. The outer side of the electromagnetic reversing multi-way valve for the paddy field tractor is provided with the shell matched with the electromagnetic reversing multi-way valve, so that a certain protection effect can be achieved, and meanwhile, the buffer spring and the limiting plate inside the shell can further limit the electromagnetic reversing multi-way valve for the paddy field tractor, so that the stability of the electromagnetic reversing multi-way valve for the paddy field tractor in the working process is guaranteed.
4. The manual emergency buttons are arranged on the outer sides of the electromagnetic coils, the electromagnetic valves can be manually opened and closed to control the actions of the electromagnetic valves even if the whole car circuit fails, the applicability in use is improved, meanwhile, the outer sides of the electromagnetic coils are designed to be dustproof and waterproof, and the electromagnetic coils are more suitable for working in paddy field environments.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a top view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the present invention;
FIG. 3 is a sequence diagram of solenoid valve operation in accordance with the present invention;
FIG. 4 is a schematic diagram of the connection structure of the electromagnetic directional valve and the electromagnetic valve in the present invention;
fig. 5 is a schematic structural view of an electromagnetic directional valve in the present invention;
fig. 6a to 6b are schematic perspective views of the housing according to the present invention;
fig. 7 is a left side view of the overall structure of the present invention.
In the figure:
1. a hydraulic valve; p, an oil inlet passage; t, an oil return passage;
2. a reversing valve group;
3. an electromagnetic reversing valve; 31. a valve body; 311. an oil port;
312. a hydraulic locking assembly; 3121. a screw plug; 3122. a locking spring; 3123. a spring seat; 3124. an electromagnetic push rod; 3125. a second electromagnetic coil; 3126. a second junction box;
32. a first junction box; 33. an electromagnetic coil I; 34. an electromagnet; 35. a movable rod; 36. a valve core; 37. a valve core spring;
working oil way A1; working oil way B1; working oil way three A2; working oil way IV B2; working oil way five A3; working oil way six B3;
4. an electromagnetic valve;
5. a housing; 51. a top plate; 52. an elastic side plate; 53. a handle; 54. a bottom plate; 55. inserting plate; 56. a mounting groove; 57. a buffer spring; 58. and a limiting plate.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Embodiment one:
referring to fig. 1 to 7, an electromagnetic reversing multiway valve for a paddy field tractor comprises a hydraulic valve 1, wherein an oil inlet passage P is arranged at a position, close to the rear side, of the middle part of the upper end of the hydraulic valve 1, an oil return passage T is arranged at a position, close to the front side, of the middle part of the upper end of the hydraulic valve 1, the hydraulic valve 1 is an electromagnetic one-way valve, an oil inlet of the hydraulic valve 1 is communicated with the oil inlet passage P when power is obtained, an oil inlet of the hydraulic valve 1 is closed when power is lost, an oil outlet of the hydraulic valve 1 is communicated with the oil return passage T, a reversing valve 2 is formed by connecting three electromagnetic reversing valves 3 in series, the reversing valve 2 is fixedly arranged on the left side of the hydraulic valve 1, the oil inlet of the hydraulic valve 1 is communicated with an oil inlet of the right electromagnetic reversing valve 3, the electromagnetic reversing valve 3 is a normally closed three-position four-way electromagnetic valve, the oil inlet of the electromagnetic reversing valve 3 is closed when power is lost, the oil outlet of the electromagnetic reversing valve 3 is communicated with the oil inlet of the oil return passage T, and the electromagnetic reversing valve 3 is communicated with a corresponding working oil passage when power is obtained.
The electromagnetic reversing valve 3 comprises a valve body 31, wherein a valve core 36 is arranged in the valve body 31, two sides of the valve core 36 are Y-shaped, the middle part of the valve core is O-shaped, movable rods 35 are fixedly connected to the front end and the rear end of the valve core 36, valve core springs 37 are sleeved on the movable rods 35 between the valve body 31 and the valve core 36, electromagnets 34 are arranged at the front end and the rear end of the valve body 31, electromagnetic coils 33 are wound on the outer sides of the electromagnets 34, and junction boxes 32 are arranged at the upper ends of the front side and the rear side of the valve body 31.
An oil through hole 311 is formed between the inner walls of the valve body 31 at the upper end of the electromagnetic reversing valve 3, the opposite sides of the oil through hole 311 are symmetrically provided with a hydraulic locking assembly 312, the hydraulic locking assembly 312 comprises a spring seat 3123, the opposite sides of the oil through hole 311 are slidably provided with a spring seat 3123, a screw plug 3121 is slidably arranged in the spring seat 3123 through a locking spring 3122, the screw plug 3121 is fixedly connected with the end of the locking spring 3122, an electromagnetic push rod 3124 is arranged outside the spring seat 3123, a second electromagnetic coil 3125 is coated outside the electromagnetic push rod 3124, and a junction box II 3126 is arranged above the second electromagnetic coil 3125.
Manual emergency buttons are arranged on the first electromagnetic coil 33 and the second electromagnetic coil 3125, and protective caps are designed on the coils.
The working oil way I A1 and the working oil way II B1 are communicated with the working oil way I A1 at the position, close to the front side, of the middle part of the upper end of the electromagnetic directional valve 3 on the right side, and the working oil way II B1 at the position, close to the rear side, of the middle part of the upper end of the electromagnetic directional valve 3 on the right side;
the position, close to the front side, of the middle part of the upper end of the electromagnetic directional valve 3 in the middle is communicated with the working oil way III A2, and the position, close to the rear side, of the middle part of the upper end of the electromagnetic directional valve 3 in the middle is communicated with the working oil way IV B2;
the electromagnetic valve 4 is fixedly arranged at the upper end of the electromagnetic directional valve 3 positioned at the left side, an oil inlet and an oil outlet of the electromagnetic valve 4 are corresponding and communicated with the oil inlet and the oil outlet of the electromagnetic directional valve 3 positioned at the left side, the electromagnetic valve 4 is a normally closed direct-acting two-position two-way electromagnetic valve, when power is lost, the oil inlet of the electromagnetic valve 4 is closed, and when power is obtained, the oil inlet of the electromagnetic valve 4 is opened and communicated with a corresponding working oil way.
Working oil way five A3, working oil way six B3, solenoid valve 4 upper end middle part be close to the front side the position communicate have working oil way five A3, solenoid valve 4 upper end middle part be close to the rear side the position communicate have working oil way six B3.
When the hydraulic valve 1, the electromagnetic reversing valve 3 and the electromagnetic valve 4 are not electrified under normal conditions, DT1 to DT9 are closed, all working oil ways are in a neutral unloading state, and an external oil pump stops working;
when the oil pressure in the working oil way five A3 is required to rise, opening DT1, starting running of an external oil pump, starting oil feeding of an oil feeding passage P, and because the electromagnetic directional valve 3 in the middle and the electromagnetic directional valve 3 on the right side are not electrified at this time, the electromagnetic directional valve is in a normally closed state, the working oil way one A1, the working oil way two B1, the working oil way three A2 and the working oil way four B2 are in an off state, hydraulic oil in the oil feeding passage P enters an oil inlet of the electromagnetic directional valve 3 on the left side, and then DT3 and DT5 are opened, at this time, the working oil in the oil feeding passage five A3 is not on, hydraulic oil in the oil feeding passage P enters a working oil way six B3, at this time, the oil pressure in a working cavity connected with the working oil way six B3 rises, when unloading oil is required, DT1 and DT3 are closed, and at this time, the hydraulic oil in the working cavity connected with the working oil way six B3 is refluxed from the oil returning passage T to the oil tank by reactive force;
when the oil pressure in the working oil way six B3 is required to rise, the DT1 is opened, an external oil pump starts to run, the oil inlet passage P starts to feed oil, the electromagnetic reversing valve 3 positioned in the middle and the electromagnetic reversing valve 3 positioned on the right side are not electrified at the moment, so that the electromagnetic reversing valve 3 is in a normally closed state, the working oil way one A1, the working oil way two B1, the working oil way three A2 and the working oil way four B2 are in an unvented state, hydraulic oil in the oil inlet passage P enters an oil inlet of the electromagnetic reversing valve 3 on the left side, the DT2 and the DT4 are opened, at the moment, the working oil way six B3 is unvented, hydraulic oil enters a working cavity connected with the working oil way five A3 and enables the oil pressure to rise, when oil return is required, the DT1 is closed, and the hydraulic oil in the working cavity connected with the working oil way five A3 is refluxed from the oil tank through the oil return passage T by reactive force;
when the oil pressure in the working oil way three A2 is required to rise, DT1 and DT7 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way three A2 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way three A2 flows back to an oil tank from the oil return passage T under the action of a reaction force;
when the oil pressure in the working oil way four B2 is required to rise, DT1 and DT6 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way four B2 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way four B2 flows back to an oil tank from an oil return passage T under a reaction force;
when the oil pressure in the first working oil way A1 is required to rise, DT1 and DT8 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the first working oil way A1 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the third working oil way A2 flows back to an oil tank from the oil return passage T under the action of a reaction force;
when the oil pressure in the working oil way B1 is required to rise, DT1 and DT9 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way B1 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way B1 flows back to an oil tank from an oil return passage T under the action of a reaction force;
when the oil pressure in the oil passage needs to be maintained, only DT4 and DT5 need to be opened at the moment.
Embodiment two:
substantially the same as the first embodiment, referring to fig. 6a and 6b, the difference is that: the hydraulic valve 1 and the reversing valve group 2 are arranged in the shell 5, the shell 5 comprises a bottom plate 54 and a mounting groove 56, the hydraulic valve 1 and the reversing valve group 2 are fixedly arranged in the mounting groove 56 formed in the upper end of the bottom plate 54, a top plate 51 is arranged above the hydraulic valve 1 and the reversing valve group 2, pipeline slots corresponding to working oil ways are formed in the top plate 51 from front to back, elastic side plates 52 are fixedly arranged at the lower ends of the left side and the right side of the top plate 51, handles 53 are fixedly arranged at the positions, close to the lower ends, of the middle parts of the side walls of the elastic side plates 52, opposite side walls of the elastic side plates 52 are fixedly connected with inserting plates 55, clamping grooves are symmetrically formed in the left side and the right side of the bottom plate 54, the inserting plates 55 are inserted in the clamping grooves, buffer springs 57 are uniformly arranged in the middle parts of the opposite side walls of the elastic side plates 52 from front to back, and the ends, far away from the elastic side plates 52, of the buffer springs 57 are fixedly connected with limiting plates 58.
During specific work, the hydraulic valve 1, the reversing valve group 2 and the electromagnetic valve 4 are installed firstly, then the hydraulic valve 1 and the reversing valve group 2 are installed in the installation groove 56, the handle 53 is pulled to enable the elastic side plate 52 to be opened outwards, the bottom plate 54 is placed on the inner side of the inserting plate 55, then the handle 53 is released, at the moment, the elastic side plate 52 can drive the inserting plate 55 to be inserted into the clamping groove, so that the bottom plate 54 is limited, meanwhile, the limiting plates 58 can be attached to two sides of the hydraulic valve 1, the reversing valve group 2 and the electromagnetic valve 4, the purpose of further limiting is achieved, and the buffer spring 57 can play a certain buffering role in the use process, so that the running stability of the buffer spring 57 is improved.
The working principle of the invention in use is as follows:
and (3) a step of: firstly, the hydraulic valve 1, the reversing valve group 2 and the electromagnetic valve 4 are installed, then the hydraulic valve 1 and the reversing valve group 2 are installed in the installation groove 56, the handle 53 is pulled to enable the elastic side plate 52 to be opened outwards, the bottom plate 54 is placed on the inner side of the plugboard 55, then the handle 53 is loosened, at the moment, the elastic side plate 52 drives the plugboard 55 to be inserted into the clamping groove, so that the bottom plate 54 is limited, meanwhile, the limiting plates 58 are attached to two sides of the hydraulic valve 1, the reversing valve group 2 and the electromagnetic valve 4, the purpose of further limiting is achieved, then all working oil way pipelines are inserted into the oil inlets and the oil outlets of the corresponding valves through the pipeline slots, and at the moment, the electromagnetic reversing multiway valve for the paddy field tractor can be normally used;
and II: under normal conditions, the hydraulic valve 1, the electromagnetic reversing valve 3 and the electromagnetic valve 4 are not electrified, the DT1 to DT9 are closed, all working oil ways are in a neutral unloading state, and the external oil pump stops working;
thirdly,: when the oil pressure in the working oil way five A3 is required to rise, opening DT1, starting running of an external oil pump, starting oil feeding of an oil feeding passage P, and because the electromagnetic directional valve 3 in the middle and the electromagnetic directional valve 3 on the right side are not electrified at this time, the electromagnetic directional valve is in a normally closed state, the working oil way one A1, the working oil way two B1, the working oil way three A2 and the working oil way four B2 are in an off state, hydraulic oil in the oil feeding passage P enters an oil inlet of the electromagnetic directional valve 3 on the left side, and then DT3 and DT5 are opened, at this time, the working oil in the oil feeding passage five A3 is not on, hydraulic oil in the oil feeding passage P enters a working oil way six B3, at this time, the oil pressure in a working cavity connected with the working oil way six B3 rises, when unloading oil is required, DT1 and DT3 are closed, and at this time, the hydraulic oil in the working cavity connected with the working oil way six B3 is refluxed from the oil returning passage T to the oil tank by reactive force;
when the oil pressure in the working oil way six B3 is required to rise, the DT1 is opened, an external oil pump starts to run, the oil inlet passage P starts to feed oil, the electromagnetic reversing valve 3 positioned in the middle and the electromagnetic reversing valve 3 positioned on the right side are not electrified at the moment, so that the electromagnetic reversing valve 3 is in a normally closed state, the working oil way one A1, the working oil way two B1, the working oil way three A2 and the working oil way four B2 are in an unvented state, hydraulic oil in the oil inlet passage P enters an oil inlet of the electromagnetic reversing valve 3 on the left side, the DT2 and the DT4 are opened, at the moment, the working oil way six B3 is unvented, hydraulic oil enters a working cavity connected with the working oil way five A3 and enables the oil pressure to rise, when oil return is required, the DT1 is closed, and the hydraulic oil in the working cavity connected with the working oil way five A3 is refluxed from the oil tank through the oil return passage T by reactive force;
when the oil pressure in the working oil way three A2 is required to rise, DT1 and DT7 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way three A2 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way three A2 flows back to an oil tank from the oil return passage T under the action of a reaction force;
when the oil pressure in the working oil way four B2 is required to rise, DT1 and DT6 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way four B2 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way four B2 flows back to an oil tank from an oil return passage T under a reaction force;
when the oil pressure in the first working oil way A1 is required to rise, DT1 and DT8 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the first working oil way A1 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the third working oil way A2 flows back to an oil tank from the oil return passage T under the action of a reaction force;
when the oil pressure in the working oil way B1 is required to rise, DT1 and DT9 are opened, at the moment, an external oil pump starts to run, an oil inlet passage P starts to feed oil, hydraulic oil in the oil way enters a working cavity connected with the working oil way B1 and rises, when oil return is required, DT1 is closed, and at the moment, the hydraulic oil in the working cavity connected with the working oil way B1 flows back to an oil tank from an oil return passage T under the action of a reaction force;
fourth, the method comprises the following steps: when the oil pressure in the oil passage needs to be maintained, only DT4 and DT5 need to be opened at the moment.
The foregoing has shown and described the basic principles, principal 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 foregoing examples, and that the foregoing description and description are merely illustrative of the principles of this invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an electromagnetic reversing multiway valve for paddy field tractor, includes hydraulic valve (1), the position that is close to the rear side in hydraulic valve (1) upper end middle part be provided with oil feed passageway (P), the position that is close to the front side in hydraulic valve (1) upper end middle part is provided with oil return passageway (T), its characterized in that: the hydraulic reversing valve comprises a hydraulic valve body, and is characterized by further comprising a reversing valve group (2), wherein the reversing valve group (2) is formed by connecting three electromagnetic reversing valves (3) in series, the reversing valve group (2) is fixedly arranged on the left side of the hydraulic valve (1), an oil inlet of the hydraulic valve (1) is communicated with an oil inlet of the right electromagnetic reversing valve (3), and an oil outlet of the hydraulic valve (1) is communicated with the right electromagnetic reversing valve (3);
the device comprises a first working oil way (A1) and a second working oil way (B1), wherein the first working oil way (A1) is communicated with the position, close to the front side, of the middle part of the upper end of the electromagnetic directional valve (3) on the right side, and the second working oil way (B1) is communicated with the position, close to the rear side, of the middle part of the upper end of the electromagnetic directional valve (3) on the right side;
the working oil way III (A2) and the working oil way IV (B2) are communicated with the working oil way III (A2) at the position, close to the front side, of the middle part of the upper end of the electromagnetic directional valve (3), and the working oil way IV (B2) is communicated with the position, close to the rear side, of the middle part of the upper end of the electromagnetic directional valve (3);
the electromagnetic valve (4) is fixedly arranged at the upper end of the electromagnetic directional valve (3) positioned at the left side, and an oil inlet and an oil outlet of the electromagnetic valve (4) are corresponding to and communicated with the oil inlet and the oil outlet of the electromagnetic directional valve (3) at the left side;
working oil way five (A3) and working oil way six (B3), the position close to the front side in the middle part of the upper end of the electromagnetic valve (4) communicate with working oil way five (A3), the position close to the rear side in the middle part of the upper end of the electromagnetic valve (4) communicate with working oil way six (B3).
2. An electromagnetic directional multiway valve for a paddy field tractor as claimed in claim 1, wherein: the hydraulic valve (1) is an electromagnetic one-way valve, when electricity is obtained, an oil inlet of the hydraulic valve (1) is communicated with the oil inlet passage (P), and when electricity is lost, an oil inlet of the hydraulic valve (1) is closed, and an oil outlet of the hydraulic valve (1) is communicated with the oil return passage (T).
3. An electromagnetic directional multiway valve for a paddy field tractor as claimed in claim 2, wherein: the electromagnetic reversing valve (3) is a normally closed three-position four-way electromagnetic valve, when power is lost, an oil inlet of the electromagnetic reversing valve (3) is closed, an oil outlet of the electromagnetic reversing valve (3) is communicated with the oil return passage (T), and when power is obtained, the oil inlet of the electromagnetic reversing valve (3) is communicated with a corresponding working oil way.
4. An electromagnetic directional multiway valve for a paddy field tractor as claimed in claim 3, wherein: the electromagnetic reversing valve (3) comprises a valve body (31), a valve core (36) is arranged in the valve body (31), movable rods (35) are fixedly connected to the front end and the rear end of the valve core (36), valve core springs (37) are sleeved on the movable rods (35) between the valve body (31) and the valve core (36), electromagnets (34) are arranged at the front end and the rear end of the valve body (31), an electromagnetic coil I (33) is wound on the outer side of each electromagnet (34), and a junction box I (32) is arranged at the upper ends of the front side and the rear side of the valve body (31).
5. An electromagnetic directional multiway valve for a paddy field tractor as defined in claim 4, wherein: the two sides of the valve core (36) are Y-shaped, and the middle part is O-shaped.
6. An electromagnetic directional multiway valve for a paddy field tractor as defined in claim 5, wherein: an oil through hole (311) is formed between the inner walls of the valve body (31) at the upper end of the electromagnetic reversing valve (3), and hydraulic locking assemblies (312) are symmetrically arranged on the opposite sides of the oil through hole (311).
7. The electromagnetic directional multiway valve for a paddy field tractor as defined in claim 6, wherein: the hydraulic locking assembly (312) comprises a spring seat (3123), a spring seat (3123) is arranged on the opposite side of the oil through hole (311), a screw plug (3121) is arranged in the spring seat (3123) in a sliding manner through a locking spring (3122), the screw plug (3121) is fixedly connected with the end of the locking spring (3122), an electromagnetic push rod (3124) is arranged on the outer side of the spring seat (3123), an electromagnetic coil II (3125) is coated on the outer side of the electromagnetic push rod (3124), and a junction box II (3126) is arranged above the electromagnetic coil II (3125).
8. The electromagnetic directional multiway valve for a paddy field tractor as defined by claim 7, wherein: the electromagnetic valve (4) is a normally closed direct-acting two-position two-way electromagnetic valve, when power is lost, the oil inlet of the electromagnetic valve (4) is closed, and when power is obtained, the oil inlet of the electromagnetic valve (4) is opened and communicated with a corresponding working oil way.
9. The electromagnetic directional multiway valve for a paddy field tractor as defined in claim 8, wherein: manual emergency buttons are arranged on the first electromagnetic coil (33) and the second electromagnetic coil (3125), and protective caps are designed on the coils.
10. An electromagnetic directional multiway valve for a paddy field tractor as claimed in claim 1, wherein: the hydraulic valve (1) and the reversing valve group (2) are arranged in the shell (5), the shell (5) comprises a bottom plate (54) and a mounting groove (56), the hydraulic valve (1) and the reversing valve group (2) are fixedly arranged in the mounting groove (56) formed in the upper end of the bottom plate (54), a top plate (51) is arranged above the hydraulic valve (1) and the reversing valve group (2), pipeline slots corresponding to a working oil way are formed in the top plate (51) from front to back, an elastic side plate (52) is fixedly arranged at the lower ends of the left side and the right side of the top plate (51), handles (53) are fixedly arranged at positions, close to the lower ends, of the middle parts of the opposite side walls of the elastic side plate (52), of the opposite side walls of the elastic side plate (52) are fixedly connected with insert plates (55), clamping grooves are symmetrically formed in the left side and the right side of the bottom plate (54), the insert plates (55) are inserted in the clamping grooves, buffer springs (57) are uniformly arranged from front to back, and the ends, far away from the elastic side plates (52), of the elastic side plates (52), are fixedly connected with limiting plates (58).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311461247.9A CN117189707A (en) | 2023-11-06 | 2023-11-06 | Electromagnetic reversing multi-way valve for paddy field tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311461247.9A CN117189707A (en) | 2023-11-06 | 2023-11-06 | Electromagnetic reversing multi-way valve for paddy field tractor |
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| CN117189707A true CN117189707A (en) | 2023-12-08 |
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| CN202311461247.9A Pending CN117189707A (en) | 2023-11-06 | 2023-11-06 | Electromagnetic reversing multi-way valve for paddy field tractor |
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| CN (1) | CN117189707A (en) |
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