CN114922876A

CN114922876A - Electromagnetic differential valve

Info

Publication number: CN114922876A
Application number: CN202210762054.6A
Authority: CN
Inventors: 谈晓伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-08-19

Abstract

The invention provides an electromagnetic differential valve, and relates to the technical field of hydraulic control. An electromagnetic differential valve comprises a driving hydraulic cylinder and a differential valve main body, wherein a differential oil cavity P is arranged in the differential valve main body, the differential valve main body is provided with an inlet P, an oil outlet B and an oil return port T which are communicated with the differential oil cavity P, a reversing valve core is arranged in the differential oil cavity P in a sliding mode, a reversing oil return passage is formed in the reversing valve core, a driving assembly used for driving the reversing valve core to slide is arranged in the differential valve main body, the driving hydraulic cylinder comprises an upper cavity and a lower cavity, a piston rod is arranged in the lower cavity, the upper cavity is communicated with a Y oil pipe, the inlet P is communicated with the Y oil pipe, and the oil outlet B is communicated with the lower cavity. The invention aims to provide an electromagnetic differential valve which can well utilize the differential principle of an oil cylinder and has the function of energy conservation.

Description

Electromagnetic differential valve

Technical Field

The invention relates to the technical field of hydraulic control, in particular to an electromagnetic differential valve.

Background

The hydraulic valve is an automatic element operated by pressure oil, is controlled by the pressure oil of a distribution valve, is usually combined with an electromagnetic distribution valve for use, can be used for remotely controlling the on-off of oil, gas and water pipeline systems of hydropower stations, is usually used for clamping, controlling, lubricating and other oil passages, and has a direct action type and a pilot type, and is of a multipurpose pilot type.

The existing hydraulic element has no reliable and practical single hydraulic element which can well utilize the oil cylinder differential principle, along with the continuous expansion and wide use of the application range of a hydraulic system, the problem of energy consumption gradually enters the field of view of the public, and how to effectively reduce the energy consumption becomes the greatest importance.

In summary, we propose an electromagnetic differential valve to solve the above problems.

Disclosure of Invention

The invention aims to provide an electromagnetic differential valve which can well utilize the oil cylinder differential principle to play a role in energy conservation.

The embodiment of the invention is realized by the following steps:

an electromagnetic differential valve comprises a driving hydraulic cylinder and a differential valve main body, wherein a differential oil cavity P is arranged in the differential valve main body, an inlet P, an oil outlet B and an oil return port T which are communicated with the differential oil cavity P are formed in the differential valve main body, a reversing valve core is arranged in the differential oil cavity P in a sliding mode and provided with a reversing oil return passage, the reversing valve core is used for communicating one of the inlet P or the oil return port T with the oil outlet B, a driving assembly used for driving the reversing valve core to slide is arranged in the differential valve main body, the driving hydraulic cylinder comprises an upper cavity and a lower cavity, a piston rod is arranged in the lower cavity, the upper cavity is communicated with an oil pipe Y, the inlet P is communicated with the oil pipe Y, and the oil outlet B is communicated with the lower cavity.

A differential oil cavity P is formed in the differential valve main body, an inlet P, an oil outlet B and an oil return port T are matched, the reversing valve core is driven by the driving assembly to realize alternate matching of the oil outlet B and the oil return port T, meanwhile, differential matching is completed under the condition of the area difference of a piston rod of the hydraulic cylinder, and therefore hydraulic oil in the lower cavity flows back into the upper cavity, the energy of the returned hydraulic oil is effectively utilized, and the energy is effectively saved.

In some embodiments of the present invention, a first engaging groove and a second engaging groove are oppositely disposed on an inner side of the differential oil chamber P, return springs are disposed at two ends of the reversing valve core, and the two return springs are respectively engaged with the first engaging groove and the second engaging groove.

The design mode reduces the energy supply consumption of the driving assembly, can achieve the effect of closing the differential electromagnetic valve in the embodiment of the invention only by removing the force of the driving assembly acting on the reversing valve core, and can reduce unnecessary energy consumption.

In some embodiments of the present invention, the first engaging groove and the second engaging groove are respectively provided with a first driving groove and a second driving groove, the driving assembly includes a first sliding iron block slidably disposed in the first driving groove and a second sliding iron block slidably disposed in the second driving groove, the first sliding iron block is sleeved with a first electromagnet, and the second sliding iron block is sleeved with a second electromagnet.

This design is better than other sliding mode oil pressure seal effect, and control is more accurate simultaneously.

In some embodiments of the present invention, the first electromagnet includes a first stationary core seat sleeved on the first sliding iron block, and the first stationary core seat is sleeved with a first coil;

the second electromagnet comprises a second static iron core seat sleeved on the second sliding iron block, and a second coil is sleeved on the second static iron core seat.

This design makes the user change its magnetic force size through the coil quantity of changing first coil and second coil according to different demands.

In some embodiments of the present invention, the differential valve body is provided with a differential cavity, the differential cavity is communicated with the oil outlet B, the differential valve body is provided with an oil inlet a, a differential valve core is slidably disposed in the differential cavity, and the differential valve core is used for opening and closing the oil inlet a.

The design mode is a common piston return stroke mode, and the operation is simple.

In some embodiments of the present invention, the differential valve core is provided with a flow port, the differential valve core is provided with an opening and closing spring, one end of the opening and closing spring abuts against the differential valve core, and the other end of the opening and closing spring abuts against the differential chamber.

The opening and closing of the differential valve element are completed by matching the opening and closing spring with the oil pressure of the hydraulic oil in the X oil way, and the design mode is simple in structure and convenient and fast to operate.

In some embodiments of the present invention, the oil inlet a communicates with a butt joint pipe, and the butt joint pipe is provided with a valve.

The design of the valve can more conveniently control the backflow time and the backflow speed of the hydraulic cylinder.

In some embodiments of the present invention, the upper chamber is slidably provided with an adjusting rod, one end of the adjusting rod is connected to the piston rod, and the other end of the adjusting rod passes through the driving hydraulic cylinder, and a rod diameter value of the adjusting rod is smaller than a rod diameter value of the piston rod.

The setting of adjusting the pole can change the size of differential value, and then plays the differential speed of regulation, and the user of service can have more actual conditions and select the drive hydraulic cylinder of the regulation pole of different sizes.

In some embodiments of the present invention, the adjusting rod is connected to the piston rod by a screw.

The arrangement of the threaded connection enables the adjusting rod to be convenient to replace when the adjusting rod is damaged, and further prolongs the overall service life of the electromagnetic differential valve in the implementation of the invention.

In some embodiments of the present invention, the differential valve body is provided with a mounting seat, and the mounting seat is provided with a mounting hole.

The installation position of the electromagnetic differential valve in the embodiment of the invention can be effectively increased by the installation seat matched with the installation hole, so that the electromagnetic differential valve is convenient for later use and installation of personnel.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

this electromagnetism differential valve sets up differential oil pocket P on the differential valve main part, cooperates import P, oil-out B and oil return opening T simultaneously, realizes oil-out B and the alternative cooperation of oil return opening T by drive assembly drive switching-over case, and simultaneously under the area difference of pneumatic cylinder piston rod, accomplish differential cooperation, and then make the interior hydraulic oil of cavity of resorption flow back to in the cavity of resorption, the effectual energy that utilizes the hydraulic oil that flows back, and then the effectual energy of having practiced thrift.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a partial block diagram of a differential solenoid valve according to an embodiment of the present invention;

FIG. 2 is a block diagram of a differential solenoid valve according to an embodiment of the present invention;

fig. 3 is a partial structural view of a differential solenoid valve according to an embodiment of the present invention.

An icon: 1-a driving hydraulic cylinder, 2-a differential valve body, 3-a differential oil chamber P, 4-an inlet P, 5-an oil outlet B, 6-an oil return port T, 7-a reversing valve core, 8-an oil return passage, 9-an upper cavity, 10-a lower cavity, 11-a first clamping groove, 12-a second clamping groove, 13-a return spring, 14-a first driving groove, 15-a second driving groove, 16-a first sliding iron block, 17-a second sliding iron block, 18-a first stationary iron core seat, 19-a second stationary iron core seat, 20-a first coil, 21-a second coil, 22-a differential cavity, 23-a valve core, 24-an oil inlet A, 25-a flow port, 26-an opening spring, 27-a butt pipe, 28-an adjusting rod, 29-mounting seat, 30-mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not require that the components be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1 to 3, an objective of the present invention is to provide an electromagnetic differential valve, which can better utilize the principle of cylinder differential to save energy.

An electromagnetic differential valve comprises a driving hydraulic cylinder 1 and a differential valve main body 2, wherein a differential oil chamber P3 is arranged in the differential valve main body 2, the differential valve main body 2 is provided with an inlet P4, an oil outlet B5 and an oil return port T6 which are communicated with the differential oil chamber P3, a reversing valve core 7 is arranged in the differential oil cavity P3 in a sliding way, a reversing oil return passage 8 is arranged on the reversing valve core 7, the direction switching valve spool 7 serves to communicate one of the inlet port P4 or the oil return port T6 with the oil outlet port B5, a driving assembly for driving the direction switching valve core 7 to slide is provided in the differential valve main body 2, the driving hydraulic cylinder 1 comprises an upper cavity 9 and a lower cavity 10, the lower cavity 10 is provided with a piston rod, the upper cavity 9 is communicated with a Y oil pipe, the inlet P4 is communicated with the Y oil pipe, and the oil outlet B5 is communicated with the lower cavity 10.

The principle of the invention is as follows: the existing hydraulic element has no reliable and practical single hydraulic element which can well utilize the oil cylinder differential principle, along with the continuous expansion and wide use of the application range of a hydraulic system, the problem of energy consumption gradually enters the field of view of the public, and how to effectively reduce the energy consumption becomes the most important factor. In the embodiment of the invention, the differential oil cavity P3 is arranged on the differential valve main body 2, and is matched with the inlet P4, the oil outlet B5 and the oil return port T6, the reversing valve core 7 is driven by the driving component to realize the alternate matching of the oil outlet B5 and the oil return port T6, and the differential matching is completed under the area difference of the piston rods of the hydraulic cylinders, so that the hydraulic oil in the lower cavity 10 flows back into the upper cavity 9, the energy of the returned hydraulic oil is effectively utilized, and the energy is effectively saved.

The reversing valve core 7 is provided with a blocking piece, the differential oil cavity P3 is an annular cavity, when the reversing valve core 7 is positioned at the central position of the differential oil cavity P3, namely the position of the driving assembly is zero, the annular blocking piece blocks the oil outlet B5, and the annular side of the annular blocking piece is abutted against the differential oil cavity P3; when the hydraulic oil pump starts to work, the Y oil pipe supplies oil, the driving assembly moves to push the reversing valve core 7, so that the annular blocking piece is moved away from the oil outlet B5, the differential oil chamber P3 is communicated with the oil outlet B5, the hydraulic oil enters the upper cavity 9 of the driving hydraulic cylinder 1 through the Y valve on one hand, and enters the lower cavity 10 of the driving hydraulic cylinder 1 through the reversing valve core 7 through the inlet P4 and then enters the oil outlet B5, this causes the hydraulic oil to act simultaneously on the lower chamber 10 with the piston rod and on the upper chamber 9 without the piston rod of the drive cylinder 1, because the stress areas at the two ends are different, the piston moves towards the direction of the rod cavity, the oil cylinder generates differential motion, meanwhile, the hydraulic oil in the lower cavity 10 with the piston rod and the oil in the Y-shaped oil way are fed into the upper cavity 9 (cavity without the piston rod) of the driving hydraulic cylinder 1 through the east-facing valve body, according to the liquid pressure principle, the speed and the pressure of the hydraulic system are the speed and the pressure of the difference between the upper area and the lower area of the live village acted by the flow of the single Y oil line; the driving assembly works again to push the reversing valve to return to the static initial position, the shielding block returns to the original position and then continuously moves forwards, so that the oil outlet B5 is communicated with the oil return port T6, namely, the oil in the lower cavity 10 with the piston rod is communicated with the oil return port T6 through the reversing valve via the oil outlet B5, and the oil cylinder is recovered to be normally used and does not work in a differential mode. The sliding of the reversing valve in the differential valve main body 2 is ingeniously utilized, the reversing valve core 7 is pushed by the driving component to automatically switch between a differential mode and a normal mode, the application of the differential principle of the driving hydraulic cylinder 1 is carried out according to the requirement, the energy in the hydraulic oil flowing back from the hydraulic cylinder is effectively and conveniently utilized, the originally ignored energy is saved, and the energy-saving effect is achieved.

In some embodiments of the present invention, a first engaging groove 11 and a second engaging groove 12 are oppositely disposed inside the differential oil chamber P3, two ends of the reversing valve element 7 are both provided with a return spring 13, and the two return springs 13 are respectively engaged with the first engaging groove 11 and the second engaging groove 12.

In the above embodiment, the return spring 13 may rebound the direction switching valve core 7 back to the initial position without the force applied by the driving assembly; the design mode reduces the energy supply consumption of the driving assembly, the effect of closing the differential electromagnetic valve in the embodiment of the invention can be achieved only by removing the force of the driving assembly acting on the reversing valve core 7, and the unnecessary energy consumption can be reduced.

In some embodiments of the present invention, the first engaging groove 11 and the second engaging groove 12 are respectively provided with a first driving groove 14 and a second driving groove 15, the driving assembly includes a first sliding iron block 16 slidably disposed in the first driving groove 14 and a second sliding iron block 17 slidably disposed in the second driving groove 15, the first sliding iron block 16 is sleeved with a first electromagnet, and the second sliding iron block 17 is sleeved with a second electromagnet.

In the above embodiment, the first electromagnet and the second electromagnet are both annular bodies, the first sliding iron block 16 is inserted into the first electromagnet, and the second sliding iron block 17 is inserted into the second electromagnet; when the first electromagnet is powered on, the first sliding iron block 16 is adsorbed, the first sliding iron block 16 further pushes one end of the reversing valve core 7, the reversing valve core 7 slides, the corresponding return spring 13 is compressed, the oil outlet B5 is communicated with the inlet port P, the hydraulic cylinder 1 is driven to start to do differential motion, the first electromagnet is powered off, the first sliding iron block 16 is separated from the first electromagnet, and the reversing valve core 7 returns to the central initial position under the action of the return spring 13; when the second electromagnet is electrified, the second sliding iron block 17 is adsorbed, the second sliding iron block 17 further pushes the other end of the reversing valve core 7 (the moving direction of the reversing valve core 7 is opposite to that when the first electromagnet is electrified), the reversing valve core 7 slides, the corresponding return spring 13 is compressed, the oil outlet B5 is communicated with the oil return port T6, the hydraulic cylinder 1 is driven to start to normally move, the second electromagnet is electrified, the second sliding iron block 17 is separated from the second electromagnet, and the reversing valve core 7 returns to the central initial position again under the action of the return spring 13; this design is better than other sliding mode oil pressure seal effect, and control is more accurate simultaneously.

In some embodiments of the present invention, the first electromagnet includes a first stationary core seat 18 sleeved on the first sliding iron block 16, and the first stationary core seat 18 is sleeved with a first coil 20;

the second electromagnet includes a second stationary core seat 19 sleeved on the second sliding iron block 17, and the second stationary core seat 19 is sleeved with a second coil 21.

In the above embodiment, the first coil 20 is powered on to obtain magnetic force to change the first static iron core seat 18 into an electromagnet, and the second coil 21 is powered on to obtain magnetic force to change the second static iron core seat 19 into an electromagnet; this design mode makes the user change its magnetic force size according to different demands through the coil quantity of changing first coil 20 and second coil 21.

In some embodiments of the present invention, the differential valve main body 2 is provided with a differential cavity 22, the differential cavity 22 is communicated with the oil outlet B5, the differential valve main body 2 is provided with an oil inlet a24, a differential valve core 23 is slidably disposed in the differential cavity 22, and the differential valve core 23 is used for opening and closing the oil inlet a 24.

In the above implementation, when the oil enters the X oil path, the oil enters the oil inlet a24, the driving assembly does not operate, the reversing valve core 7 is located at the middle position, at this time, the differential valve core 23 is opened, the hydraulic oil flows through the differential valve main body 2 through the oil inlet a24 and the oil outlet and enters the lower cavity 10 (i.e., the lower cavity 10 with the piston rod) of the driving hydraulic cylinder 1, the piston rod returns, and the hydraulic oil in the upper cavity 9 returns through the Y pipeline; the design mode is a common piston return stroke mode, and the operation is simple.

In some embodiments of the present invention, the differential valve core 23 is opened with a flow port 25 and an oil inlet a24, the differential valve core 23 is opened with an opening and closing spring 26, one end of the opening and closing spring 26 abuts against the differential valve core 23, and the other end abuts against the differential cavity 22.

In the above embodiment, the opening and closing of the differential valve element 23 is completed by using the opening and closing spring 26 in cooperation with the oil pressure of the hydraulic oil in the X oil path, and the design mode has a simple structure and is convenient and fast to operate.

In some embodiments of the present invention, the oil inlet a24 communicates with a butt joint pipe 27, and the butt joint pipe 27 is provided with a valve.

In the above embodiments, the valves are plumbing fixtures used to open and close the piping, control flow direction, regulate and control parameters (temperature, pressure and flow) of the transport medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve, etc.; the design of the valve can more conveniently control the backflow time and the backflow speed of the hydraulic cylinder.

In some embodiments of the present invention, the upper chamber 9 is slidably provided with an adjusting rod 28, one end of the adjusting rod 28 is connected to the piston rod, and the other end of the adjusting rod 28 passes through the driving hydraulic cylinder 1, and a rod diameter value of the adjusting rod 28 is smaller than a rod diameter value of the piston rod.

In the above embodiment, the setting of the adjusting rods 28 can change the magnitude of the differential value, thereby achieving the purpose of adjusting the differential speed, and a user can select the driving hydraulic cylinders 1 of the adjusting rods 28 with different magnitudes according to actual conditions.

In some embodiments of the present invention, the adjustment rod 28 is threadedly coupled to the piston rod.

In the above embodiment, the threaded connection is provided so that the adjusting rod 28 can be easily replaced when damaged, thereby increasing the overall service life of the differential solenoid valve in the implementation of the present invention.

In some embodiments of the invention, the differential valve body 2 is provided with a mounting seat 29, and the mounting seat 29 is provided with a mounting hole 30.

In the above embodiment, the installation position of the differential electromagnetic valve in the embodiment of the present invention can be effectively increased by the installation of the installation seat 29 and the installation hole 30, which is convenient for a person to use and install in a later period, wherein the installation hole 30 may be a threaded hole.

In summary, the present invention provides an electromagnetic differential valve, which has at least the following advantages:

the existing hydraulic element has no reliable and practical single hydraulic element which can well utilize the oil cylinder differential principle, along with the continuous expansion and wide use of the application range of a hydraulic system, the problem of energy consumption gradually enters the field of view of the public, and how to effectively reduce the energy consumption becomes the most important factor. In the embodiment of the invention, the differential oil cavity P3 is arranged on the differential valve main body 2, and is matched with the inlet P4, the oil outlet B5 and the oil return port T6, the reversing valve core 7 is driven by the driving component to realize the alternate matching of the oil outlet B5 and the oil return port T6, and the differential matching is completed under the area difference of the piston rods of the hydraulic cylinders, so that the hydraulic oil in the lower cavity 10 flows back into the upper cavity 9, the energy of the returned hydraulic oil is effectively utilized, and the energy is effectively saved.

The reversing valve core 7 is provided with a blocking piece, the differential oil cavity P3 is an annular cavity, when the reversing valve core 7 is positioned at the central position of the differential oil cavity P3, namely the position of the driving assembly is zero, the annular blocking piece blocks the oil outlet B5, and the annular side of the annular blocking piece is abutted against the differential oil cavity P3; when the hydraulic drive hydraulic cylinder starts to work, the Y oil pipe supplies oil, the driving assembly moves to push the reversing valve core 7, so that the annular blocking block is moved away from the oil outlet B5, the differential oil chamber P3 is communicated with the oil outlet B5, hydraulic oil enters the upper cavity 9 of the drive hydraulic cylinder 1 through the Y valve on one hand, enters the oil outlet B5 through the reversing valve core 7 through the inlet P4 on the other hand, then flows into the lower cavity 10 of the drive hydraulic cylinder 1, this causes the hydraulic oil to act simultaneously on the lower chamber 10 with the piston rod and on the upper chamber 9 without the piston rod of the drive cylinder 1, because the stress areas at the two ends are different, the piston moves towards the direction of the rod cavity, the oil cylinder generates differential motion, meanwhile, the hydraulic oil in the lower cavity 10 with the piston rod and the oil in the Y-shaped oil way are fed into the upper cavity 9 (cavity without the piston rod) of the driving hydraulic cylinder 1 through the east-facing valve body, according to the liquid pressure principle, the speed and the pressure of the device are the speed and the pressure of the difference between the upper area and the lower area of the live village acted by the flow of the single Y oil way; the driving assembly works again to push the reversing valve to return to the static initial position, the shielding block returns to the original position and then continuously moves forwards, so that the oil outlet B5 is communicated with the oil return port T6, namely, the oil in the lower cavity 10 with the piston rod is communicated with the oil return port T6 through the reversing valve via the oil outlet B5, and the oil cylinder is recovered to be normally used and does not work in a differential mode. The sliding of the reversing valve in the differential valve main body 2 is ingeniously utilized, the reversing valve core 7 is pushed by the driving component to automatically switch between a differential mode and a normal mode, the application of the differential principle of the driving hydraulic cylinder 1 is carried out according to the requirement, the energy in the hydraulic oil flowing back from the hydraulic cylinder is effectively and conveniently utilized, the originally ignored energy is saved, and the energy-saving effect is achieved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an electromagnetism differential valve, its characterized in that, including drive hydraulic cylinder and differential valve main part, be provided with differential oil pocket P in the differential valve main part, the differential valve main part seted up with import P, oil-out B and oil return T that differential oil pocket P is linked together, it is provided with the switching-over case to slide in the differential oil pocket P, the switching-over case has seted up the switching-over oil return route, the switching-over case be used for with import P perhaps one of oil return T the two with oil-out B is linked together, be provided with in the differential valve main part and be used for the drive the gliding drive assembly of switching-over case, it includes cavity and lower cavity to drive the hydraulic cylinder, the cavity is provided with the piston rod down, it has Y oil pipe to go up the cavity intercommunication, import P communicate in Y oil pipe, oil-out B communicate in cavity down.

2. The differential electromagnetic valve according to claim 1, wherein a first engaging groove and a second engaging groove are oppositely disposed inside the differential oil chamber P, return springs are disposed at both ends of the reversing valve element, and the two return springs are engaged with the first engaging groove and the second engaging groove, respectively.

3. The differential electromagnetic valve according to claim 2, wherein the first engaging groove and the second engaging groove are respectively provided with a first driving groove and a second driving groove, the driving assembly comprises a first sliding iron block slidably disposed in the first driving groove and a second sliding iron block slidably disposed in the second driving groove, the first sliding iron block is sleeved with a first electromagnet, and the second sliding iron block is sleeved with a second electromagnet.

4. The differential electromagnetic valve according to claim 3, wherein the first electromagnet comprises a first stationary core seat sleeved on the first sliding iron block, the first stationary core seat being sleeved with a first coil;

5. The electromagnetic differential valve according to claim 4, wherein the differential valve body is provided with a differential cavity, the differential cavity is communicated with the oil outlet B, the differential valve body is provided with an oil inlet A, the differential cavity is internally slidably provided with a differential spool, and the differential spool is used for opening and closing the oil inlet A.

6. The differential electromagnetic valve according to claim 5, wherein the differential spool is opened with a flow port, and the differential spool is inserted with an opening and closing spring, one end of the opening and closing spring abuts against the differential spool, and the other end abuts against the differential chamber.

7. The differential electromagnetic valve according to claim 6, wherein the oil inlet A communicates with a butt joint pipe, and the butt joint pipe is provided with a valve.

8. The differential electromagnetic valve according to claim 1, wherein the upper chamber is slidably provided with an adjusting rod, one end of the adjusting rod is connected to the piston rod, the other end of the adjusting rod passes through the driving hydraulic cylinder, and the rod diameter of the adjusting rod is smaller than that of the piston rod.

9. The differential electromagnetic valve according to claim 8, wherein the adjustment rod is threadedly coupled to the piston rod.

10. The differential electromagnetic valve according to claim 9, wherein the differential valve main body is provided with a mounting seat, and the mounting seat is provided with a mounting hole.