Deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact

Abstract

The present application belongs to the technical field of control valve, and discloses a deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact, which comprises a reversing valve body and an electromagnet sleeve assembly, and the two ends of the reversing valve body are respectively connected with the electromagnet sleeve assembly; the electromagnet sleeve assembly comprises an electromagnet sleeve, an armature top rod, an armature core, an electromagnet sleeve piston and an electromagnet sleeve plug, the armature core is movably arranged in the electromagnet sleeve, one end of the electromagnet sleeve plug is connected with one end of the electromagnet sleeve, and the electromagnet sleeve piston is movably arranged in the electromagnet sleeve plug; the other end of the electromagnet sleeve is connected with the reversing valve body; one end of the armature top rod is fixed on the armature core, and the other end is abutted on a valve core of the reversing valve body; the electromagnet sleeve piston is in contact with external deep-sea water; external deep-sea pressure drives the electromagnet sleeve piston to move to act on the hydraulic medium in the electromagnet sleeve, so that the self-adaptive compensation of pressure is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of control valve, and more particularly to a deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact. BACKGROUND

[0002] Hydraulic technology has the advantages of high power density, strong operation ability and easy pressure compensation, and is widely used in deep-sea equipment. The electromagnetic reversing valve suitable for deep-sea environment is a core basic component of manned submersible, unmanned submersible and other major equipment.

[0003] The electromagnetic reversing valve is an important control element in modern hydraulic systems. As an electro-hydraulic conversion element, it uses the suction force generated by the energization of the electromagnet to push the valve core to change the on-off relationship of the oil port on the valve body, thereby realizing the on-off of each oil circuit.

[0004] The common three-position four-way electromagnetic reversing spool valve has the problems of large volume, large working noise and poor adaptability to environmental pressure, and cannot meet the technical requirements of deep-sea equipment. Therefore, how to overcome the above defects and develop an electromagnetic reversing valve with low working noise and capable of adapting to deep-sea high pressure environment is an important problem to be solved in the development of deep-sea equipment. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides a deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact, which solves the problems of poor adaptability to environmental pressure and large impact of the existing electromagnetic reversing valve.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present application, a deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact is provided, which comprises a reversing valve body, an electromagnet coil assembly and an electromagnet sleeve assembly, the two opposite ends of the reversing valve body are respectively connected with the electromagnet sleeve assembly, the electromagnet sleeve assembly is sleeved with the electromagnet coil assembly, and the electromagnet coil assembly is fixedly connected to the reversing valve body.

[0007] The electromagnet sleeve assembly comprises an electromagnet sleeve, an armature top rod, an armature core, an electromagnet sleeve piston and an electromagnet sleeve plug, the armature core is movably arranged in the electromagnet sleeve, one end of the electromagnet sleeve plug is connected to one end of the electromagnet sleeve, and the electromagnet sleeve piston is movably arranged in the electromagnet sleeve plug; the other end of the electromagnet sleeve is connected to the reversing valve body; one end of the armature top rod is fixed on the armature core, and the other end abuts against the valve core of the reversing valve body; during operation, the electromagnet sleeve piston is in contact with the deep-sea water outside; the external deep-sea pressure acts on the hydraulic medium in the electromagnet sleeve by driving the electromagnet sleeve piston to move, thereby realizing self-adaptive compensation of pressure.

[0008] Further, the opposite ends of the electromagnet sleeve are respectively provided with a stepped spring hole and a receiving cavity, the bottom surface of the receiving cavity is provided with a connecting hole, the connecting hole is in communication with the spring hole; the armature core is movably arranged in the receiving cavity; the one end of the electromagnet sleeve plug part is arranged in the receiving cavity, the one end of the electromagnet sleeve plug arranged in the electromagnet sleeve is provided with a first groove, the bottom surface of the first groove is provided with a first through hole penetrating the electromagnet sleeve plug, and the first groove and the first through hole are used for accommodating the electromagnet sleeve piston.

[0009] Further, the bottom surface of the receiving cavity is further provided with a sleeve suction surface annular groove; the end surface of the armature core facing the sleeve suction surface annular groove is formed with an armature core annular step, the shape and size of the armature core annular step correspond to the sleeve suction surface annular groove respectively, and the sleeve suction surface annular groove and the armature core annular step are detachably connected.

[0010] Further, the outer periphery of the electromagnet sleeve is formed with a sleeve magnetic separation ring.

[0011] Further, the electromagnet coil assembly comprises an electromagnet end cover, an electromagnet shell, an electromagnet coil, a wire, an electromagnet coil skeleton and an electromagnet screw cover, the electromagnet coil is wound on the electromagnet coil skeleton, and both are arranged in the electromagnet shell, the electromagnet end cover is installed on the electromagnet shell by interference fit to fix the electromagnet coil and the electromagnet coil skeleton; the lead wire of the electromagnet coil is connected with the wire by welding, and the welding point is coated by epoxy resin.

[0012] Further, the two sides and the bottom end of the electromagnet shell are processed with a through hole, the through hole is used for entering seawater into the inside of the electromagnet shell, so as to completely immerse the electromagnet coil.

[0013] Further, the electromagnet coil skeleton is sleeved on the electromagnet sleeve, and the electromagnet screw cover is connected to the electromagnet shell.

[0014] Further, the reversing valve body comprises a valve body, a valve core, a ball expansion plug and a return spring, the valve core is movably arranged in the valve body, and the ball expansion plug is arranged on one side of the valve body; one end of the return spring abuts against the valve core, and the other end abuts against the bottom surface of the spring hole after penetrating the armature top rod.

[0015] Further, the valve body is rectangular, and a center hole is formed in the valve body, and the center axis of the center hole coincides with the center axis of the valve body; a valve port is further formed in the circumferential surface of the valve body, and the valve port is communicated with the center hole; the valve core is communicated with the valve port or cut off by moving along the axial direction of the valve body.

[0016] Overall, compared with the prior art, the deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact provided by the present application mainly has the following beneficial effects:

[0017] 1. The external deep-sea pressure is applied to the hydraulic medium in the electromagnetic sleeve through the displacement of the electromagnetic sleeve piston, realizing self-adaptive compensation of the pressure, so that the electromagnetic reversing valve can realize the reversing control function in any deep-sea area; meanwhile, in the process that the annular step at the bottom of the armature enters the annular hook groove of the electromagnetic sleeve attraction surface, the step will extrude the hydraulic medium in the groove, and the force of the hydraulic medium on the annular step slows down the movement speed of the armature and reduces the impact of the armature on the electromagnetic sleeve when the armature is attracted, thereby reducing the noise and impact of the electromagnetic iron during operation.

[0018] 2. In order to solve the problem of small thrust and large volume of the traditional on-off electromagnetic iron, a magnetic isolation ring structure is processed in the middle of the electromagnetic sleeve, which not only controls the volume of the electromagnetic iron, but also increases the magnetic flux density of the armature, improves the thrust of the electromagnetic iron, and improves the reliability and response speed of the reversing valve action.

[0019] 3. Compared with the traditional electromagnetic iron for valves, the electromagnetic coil is immersed in seawater and exchanges heat with seawater, effectively inhibiting the heating of the electromagnetic coil and improving the stability of the electromagnetic iron during operation.

[0020] 4. In order to solve the corrosion and wear of the electromagnetic components and the valve core components caused by the corrosion of natural seawater, a layer of nickel-zinc alloy composite coating is added to the surface of the magnetic component such as the electromagnetic iron shell, sleeve and armature by electroplating, and the magnetic material itself adopts pure iron DT4C, which has the advantages of high magnetic permeability, high saturation magnetic induction intensity and low coercive force, can meet the use requirements of seawater as working medium, and the response speed of the valve is fast. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure diagram of a deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact provided by the present application;

[0022] Figure 2 is Figure 1 is a sectional view of the deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact in

[0023] Figure 3 in (a) is Figure 1Figure 2 is a sectional view of the electromagnet sleeve assembly of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1, (b) is a local enlarged schematic view of I in (a);

[0024] Figure 4 Figure 1 is a schematic view of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1. Figure 1 Figure 2 is a sectional view of the electromagnet sleeve assembly of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1, (b) is a local enlarged schematic view of I in (a);

[0025] Figure 5 Figure 1 is a schematic view of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1. Figure 1 Figure 3 is a schematic view of the armature core of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1.

[0026] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein: 1-valve body, 2-valve core, 3-electromagnet end cover, 4-electromagnet sleeve, 5-electromagnet shell, 6- armature top rod, 7-limiting sheet, 8-magnetic coil, 9-armature core, 10-wire, 11-electromagnet screw cap, 12-electromagnet sleeve piston, 13-electromagnet sleeve plug, 14-magnetic coil skeleton, 15-ball expansion plug, 16-first sealing ring, 17-second sealing ring, 18-resetting spring, 19-third sealing ring, 20-fourth sealing ring, 21-fifth sealing ring, 22-sleeve attraction surface annular groove, 23-armature core annular step, 24-sleeve magnetic isolation ring, 25-armature core flow guide hole, 26-armature top rod mounting hole. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] Figure 1 is a schematic view of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1. Figure 1 Figure 2 is a sectional view of the electromagnet sleeve assembly of the deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact in Figure 1, (b) is a local enlarged schematic view of I in (a); Figure 2 The present application provides a deep-sea pressure adaptive electromagnetic reversing valve capable of reducing impact, which has the advantages of small volume, reliable action, large working pressure, and automatic pressure compensation, solves the problems of large volume, serious structural deformation in deep-sea high-pressure environment, poor adaptability, and large working noise of traditional electromagnetic reversing valves, and can realize reversing control function in any depth of sea.

[0029] The electromagnetic reversing valve comprises a reversing valve body, an electromagnet coil assembly and an electromagnet sleeve assembly, the electromagnet sleeve assembly is threadedly connected to the opposite ends of the reversing valve body, the electromagnet coil assembly is sleeved on the electromagnet sleeve assembly, and the electromagnet coil assembly is fixed to the reversing valve body by a nut.

[0030] The reversing valve body comprises a valve body 1, a valve core 2, a ball expansion plug 15, a first sealing ring 16 and a reset spring 18, the valve core 2 is movably arranged in the valve body 1, and the ball expansion plug 15 is arranged on one side of the valve body 1. One end of the reset spring 18 abuts against the valve core 2, and the other end abuts against the electromagnet sleeve assembly.

[0031] The valve body 1 is rectangular, and a center hole is formed in the valve body 1, the center axis of the center hole coincides with the center axis of the valve body 1. A valve port is further formed in the peripheral surface of the valve body 1, the valve port is in communication with the center hole, and the valve core 2 is moved along the axial direction of the valve body 1 to make the center hole in communication with or isolated from the valve port. A plug mounting hole is further formed in the end surface of the valve body. The valve core 2 is movably arranged in the center hole, the ball expansion plug 15 is arranged in the plug mounting hole, one end of the reset spring 18 extends into the center hole and abuts against the end surface of the valve core 2, and the other end extends into the electromagnet sleeve assembly and abuts against the electromagnet sleeve assembly. In this embodiment, the valve core is pushed by the on-off of the electromagnet to realize the opening and closing of the valve port; the first sealing ring 16 is arranged at the valve port to realize the sealing of the valve port with the outside; the gap sealing is formed between the valve core and the valve body; the flow channel is processed on the side surface of the valve body to connect the two oil return ports of the reversing valve and balance the pressure of the two oil return cavities of the reversing valve.

[0032] Please refer to Figure 3 , Figure 4 and Figure 5The electromagnet sleeve assembly comprises an electromagnet sleeve 4, an armature top rod 6, a limiting sheet 7, an armature core 9, an electromagnet sleeve piston 12, an electromagnet sleeve plug 13, a second sealing ring 17, a third sealing ring 19, a fourth sealing ring 20 and a fifth sealing ring 21. One end of the armature top rod 6 abuts against the valve core after passing through the return spring 18, and the other end is fixed on the armature core 9. The armature core 9 is movably arranged in the electromagnet sleeve 4. One end of the electromagnet sleeve plug 13 is connected to the electromagnet sleeve, and the electromagnet sleeve piston 12 is movably arranged in the electromagnet sleeve plug 13. The third sealing ring 19 is arranged between the electromagnet sleeve plug 13 and the electromagnet sleeve piston 12. The second sealing ring 17 is arranged between the electromagnet sleeve and the valve body. The fourth sealing ring 20 is arranged between the electromagnet sleeve and the electromagnet sleeve plug 13. The fifth sealing ring 21 is arranged between the electromagnet sleeve piston 12 and the electromagnet sleeve plug 13.

[0033] The electromagnet sleeve is a stepped cylinder, and stepped spring holes and a receiving cavity are formed at opposite ends of the electromagnet sleeve respectively. A connecting hole is formed in the bottom surface of the receiving cavity, and the connecting hole is in communication with the spring holes. In this embodiment, the center axis of the spring holes, the center axis of the connecting hole and the center axis of the receiving cavity coincide. A sleeve suction surface annular groove 22 is also formed in the bottom surface of the receiving cavity.

[0034] A sleeve magnetic shielding ring 24 is formed on the outer periphery of the electromagnet sleeve. Specifically, an annular groove is processed in the middle of the blank of the electromagnet sleeve, copper is cladded in the annular groove by laser cladding, and the cladded sleeve blank is integrally processed to obtain the electromagnet sleeve with the sleeve magnetic shielding ring 24.

[0035] The armature core 9 is provided with an armature top rod mounting hole 26 and an armature core flow guide hole 25. The armature core is movably arranged in the receiving cavity. One end of the armature rod is mounted in the armature top rod mounting hole 26 by interference fit, and the armature core is attracted to the bottom surface of the receiving cavity when the electromagnet coil assembly is energized, and simultaneously pushes the valve core to move. The limiting sheet 7 is arranged on the bottom surface of the receiving cavity, which limits the movement of the armature core and reduces the influence of residual magnetism.

[0036] In the embodiment, threads and angular sealing chamfers are machined on both sides of the valve body, the bottom end of the electromagnet sleeve is also machined with an angular sealing chamfer, and a second sealing ring 17 is installed in the angular sealing groove formed by the two to isolate the spring hole from the external environment; the first sealing ring 16, the second sealing ring 17, the third sealing ring 19, the fourth sealing ring 20 and the fifth sealing ring 21 are all O-shaped sealing rings; the armature inside the electromagnet sleeve is immersed in high-pressure water, forming a wet electromagnet structure.

[0037] The armature core and the electromagnet sleeve are arranged with a certain spacing, forming a working air gap. In the embodiment, the maximum working air gap between the electromagnet sleeve and the armature core is set to 1.85 mm, and the stroke of the armature core is set to 1.75 mm. The armature core is completely immersed in the hydraulic medium, reducing the friction between the armature core and the electromagnet sleeve.

[0038] An armature core annular step 23 is formed on the end face of the armature core towards the sleeve suction surface annular groove 22, the shape and size of the armature core annular step 23 correspond to the sleeve suction surface annular groove 22 respectively, and the sleeve suction surface annular groove 22 and the armature core annular step 23 are detachably connected. During the process of being attracted to the electromagnet sleeve, the armature core annular step 23 is inserted into the sleeve suction surface annular groove 22, and the oil liquid in the sleeve suction surface annular groove 22 is extruded to slow down the movement speed of the armature core, thereby reducing the impact of the armature core on the electromagnet sleeve and reducing the noise during the operation of the electromagnet.

[0039] An electromagnet sleeve plug is installed on the end of the electromagnet sleeve away from the valve body, a fourth sealing ring 20 is installed on the electromagnet sleeve plug, and the two are fixed by buckling. A first recess is formed in one end of the electromagnet sleeve inside the electromagnet sleeve, and a first through hole is formed in the bottom surface of the first recess. The first recess and the first through hole are used to accommodate the electromagnet sleeve piston 12. The electromagnet sleeve piston 12 is in the shape of a T, and a fifth sealing ring 21 is installed thereon. The electromagnet sleeve piston can move axially in the electromagnet sleeve plug, and the step at the bottom cooperates with the first recess to limit the movement of the electromagnet piston, preventing the electromagnet sleeve piston from falling off. The external deep-sea pressure acts on the hydraulic medium in the electromagnet sleeve through the displacement of the electromagnet sleeve piston, realizing self-adaptive compensation of pressure.

[0040] The electromagnet coil assembly comprises an electromagnet end cover 3, an electromagnet shell 5, an electromagnet coil 8, a wire 10, an electromagnet coil skeleton 14 and an electromagnet screw cap 11. The electromagnet coil is wound on the electromagnet coil skeleton 14 and is arranged in the electromagnet shell 5. The electromagnet end cover 3 is installed on the electromagnet shell 5 by interference fit to fix the electromagnet coil and the electromagnet coil skeleton 14. The lead wire of the electromagnet coil is connected with the wire 10 by welding. The welding point is coated with epoxy resin to be insulated from seawater. The electromagnet shell 5 is provided with through holes on both sides and the bottom end. Seawater enters the electromagnet shell 5 through the through holes to completely immerse the electromagnet coil.

[0041] The electromagnet coil skeleton 14 is sleeved on the electromagnet sleeve, and the electromagnet screw cap 11 is connected to the electromagnet shell 5. In an embodiment, the surfaces of the magnetic conduction components such as the electromagnet shell, the sleeve, the armature and the like are additionally provided with a nickel-zinc alloy composite plating layer by electroplating. The magnetic conduction material itself adopts electrically pure iron DT4C, which has the advantages of high magnetic permeability, high saturation magnetic induction intensity, low coercive force and the like, can meet the use requirements of seawater as a working medium, and has a fast response speed.

[0042] During installation, the electromagnet sleeve assembly is assembled first, then the electromagnet coil assembly is assembled, and finally the overall assembly of the electromagnetic directional control valve is completed. During assembly of the electromagnet sleeve assembly, the armature top rod is installed in the armature top rod mounting hole 26 by interference fit first, then the limiting sheet 7 is placed in the electromagnet sleeve, and then the armature top rod and the armature core are placed in the electromagnet sleeve as a whole. The electromagnet sleeve piston is installed with the fifth sealing ring 21, and the electromagnet sleeve plug is installed with the fourth sealing ring 20. Then the electromagnet sleeve piston is installed in the first recess and the first through hole of the electromagnet sleeve plug, and finally the two are installed as a whole at the tail end of the electromagnet sleeve and are fixed by buckling to complete the assembly of the electromagnet sleeve assembly. During installation of the electromagnet coil, the electromagnet coil and the electromagnet coil skeleton are placed in the electromagnet shell as a whole first, then the electromagnet end cover 3 is installed on the electromagnet shell by interference fit to fix the electromagnet coil and the electromagnet coil skeleton, and finally the lead wire of the electromagnet coil is connected with the wire by welding. The welding point is coated with epoxy resin to complete the assembly of the electromagnet coil. The ball expansion plug is installed in the plug mounting hole of the valve body, and the valve core is inserted into the center hole of the valve body. The threaded end of the electromagnet sleeve assembly is installed with the second sealing ring 17, the reset spring 18 is installed in the spring mounting hole of the electromagnet sleeve, and then the electromagnet sleeve assembly is connected to the valve body by screwing. The electromagnet coil, the third sealing ring 19 and the electromagnet screw cap 11 are sequentially sleeved on the electromagnet sleeve and are axially fixed by the electromagnet screw cap 11. Finally, the first sealing ring 16 is installed at the bottom oil port (valve port) of the valve body, and thus the assembly of the low-noise deep-sea pressure self-adaptive electromagnetic directional control valve is completed.

[0043] When the electromagnet coil is energized, an electromagnetic field is generated, the electromagnet sleeve, the electromagnet end cover 3, the electromagnet shell, the electromagnet sleeve gland nut, the armature core form a closed magnetic flux loop, under the action of the electromagnetic field, the electromagnet sleeve generates an attractive force on the armature core, the armature core drives the armature top rod and the valve core to overcome the resistance of the spring force, the electromagnetic reversing valve port is opened. The sleeve magnetic ring 24 plays a role in improving the magnetic flux density of the armature core and increasing the electromagnetic force. When the electromagnet coil is de-energized, the electromagnetic force acting on the armature core disappears, under the action of the reset force of the reset spring 18, the valve core returns to the middle position, and the electromagnetic reversing valve is closed. The left and right electromagnet coils of the electromagnetic reversing valve respectively realize the conversion of the left, middle and right positions of the electromagnetic reversing valve by gaining and losing electricity, and realize the on-off of the oil circuit.

[0044] The application further provides a deep-sea device, which comprises a hydraulic system, and a reversing valve of the hydraulic system is the deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact as described above.

[0045] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep-sea pressure self-adaptive electromagnetic reversing valve capable of reducing impact, characterized in that: the electromagnetic reversing valve comprises a reversing valve body, an electromagnetic coil assembly and an electromagnetic sleeve assembly, the reversing valve body is connected with the electromagnetic sleeve assembly at two opposite ends, the electromagnetic sleeve assembly is sleeved with the electromagnetic coil assembly, and the electromagnetic coil assembly is fixedly connected to the reversing valve body; the electromagnetic sleeve assembly comprises an electromagnetic sleeve, an armature top rod, an armature core, an electromagnetic sleeve piston and an electromagnetic sleeve plug, the armature core is movably arranged in the electromagnetic sleeve, one end of the electromagnetic sleeve plug is connected to one end of the electromagnetic sleeve, and the electromagnetic sleeve piston is movably arranged in the electromagnetic sleeve plug; the other end of the electromagnetic sleeve is connected to the reversing valve body; one end of the armature top rod is fixed on the armature core, and the other end is abutted on a spool of the reversing valve body; in operation, the electromagnetic sleeve piston is in contact with deep-sea water outside, and the deep-sea pressure outside drives the electromagnetic sleeve piston to act on the hydraulic medium in the electromagnetic sleeve, so as to realize self-adaptive compensation of pressure; the surface of the electromagnetic sleeve opposite to the armature core is provided with a sleeve suction surface annular groove, the end face of the armature core facing the sleeve suction surface annular groove is formed with an armature core annular step, and the sleeve suction surface annular groove and the armature core annular step are detachably connected. The opposite ends of the electromagnetic sleeve are respectively provided with a stepped spring hole and a receiving cavity, the bottom surface of the receiving cavity is provided with a connecting hole, the connecting hole is in communication with the spring hole, the armature core is movably arranged in the receiving cavity, one end of the electromagnetic sleeve plug is arranged in the receiving cavity, one end of the electromagnetic sleeve plug arranged in the electromagnetic sleeve is provided with a first recess, the bottom surface of the first recess is provided with a first through hole penetrating through the electromagnetic sleeve plug, and the first recess and the first through hole are used for accommodating the electromagnetic sleeve piston. The sleeve suction surface annular groove is arranged on the bottom surface of the receiving cavity, the shape and size of the armature core annular step correspond to those of the sleeve suction surface annular groove, and the sleeve suction surface annular groove and the armature core annular step are connected or separated by moving the armature core towards or away from the bottom surface of the receiving cavity.

2. The deep-sea pressure-adaptive electromagnetic on-off valve capable of reducing impact according to claim 1, characterized by: A sleeve magnetic separation ring is formed on the outer periphery of the electromagnetic sleeve.

3. The deep-sea pressure-adaptive impact-reducing solenoid valve according to claim 2, characterized in that: The electromagnetic coil assembly comprises an electromagnetic end cover, an electromagnetic shell, an electromagnetic coil, a wire, an electromagnetic coil framework and an electromagnetic screw cover, the electromagnetic coil is wound on the electromagnetic coil framework and arranged in the electromagnetic shell, the electromagnetic end cover is installed on the electromagnetic shell by interference fit to fix the electromagnetic coil and the electromagnetic coil framework, and the lead wire of the electromagnetic coil is connected with the wire by welding, and the welding point is coated with epoxy resin.

4. A deep-sea pressure-adaptive electromagnetic on-off valve capable of reducing impact according to any one of claims 1 to 3, characterized in that: ​ 5. The deep-sea pressure-adaptive impact-reducing solenoid valve of claim 1, wherein: ​ 6. The deep-sea pressure-adaptive impact-reducing solenoid valve according to claim 5, characterized in that: ​ 7. The deep-sea pressure-adaptive impact-reducing solenoid valve of claim 5, wherein: The electromagnetic coil frame is sleeved on the electromagnetic sleeve, and the electromagnetic screw cap is connected to the electromagnetic shell.

8. The deep-sea pressure-adaptive impact-reducing solenoid valve according to claim 2, characterized in that: The reversing valve body comprises a valve body, a valve core, a ball expansion plug and a reset spring, the valve core is movably arranged in the valve body, and the ball expansion plug is arranged on one side of the valve body; one end of the reset spring abuts against the valve core, and the other end abuts against the bottom surface of the spring hole after passing through the armature top rod.

9. The deep-sea pressure-adaptive impact-reducing solenoid valve according to claim 8, characterized in that: The valve body is in a rectangular shape, and a center hole is formed in the valve body, a center axis of the center hole coincides with a center axis of the valve body; a valve port is further formed in a circumferential surface of the valve body, the valve port is in communication with the center hole, and the valve core is moved along an axial direction of the valve body to make the center hole in communication with or cut off the valve port.

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