Underwater hydraulic electromagnetic switch valve with valve core pressure balancing and compensating oil tank

Abstract

The invention provides an underwater water pressure electromagnetic switch valve with a valve element pressure balancing and compensating oil tank. The underwater water pressure electromagnetic switch valve comprises a valve element guide cover plate, a valve body, an electromagnetic push rod and the oil tank which are sequentially connected from top to bottom. A reset spring mounting cavity is formed in the valve element guide cover plate. A spring adjusting piston and a reset spring are mounted in the reset spring mounting cavity; the valve body is provided with a stepped through hole, the upper portion is a valve element assembly cavity, and the lower portion is an electromagnet push rod movement cavity. The valve body is provided with a water inlet I, a water outlet I and an oil tank oil supplementing opening I; a valve element and a valve sleeve are installed in the valve body. The valve element is of a stepped shaft type structure. The valve sleeve is provided with a through hole, a top opening of the through hole is a valve port conical surface, and the valve port conical surface is matched with the conical surface sealing section to form a valve port. According to the technical scheme, the problems that use of current underwater hydraulic components is easily affected by environmental water pressure, and the electromechanical converter cannot directly work underwater are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of water hydraulics, and in particular to an underwater water pressure electromagnetic switch valve with a valve core pressure balancing and compensation oil tank. Background Art

[0002] As the ocean plays an increasingly important role in the competition among major powers, the demand for the development of underwater hydraulic equipment is also increasing. Since water is a clean energy source, hydraulic systems using water as a medium have become the first choice for underwater working systems. Many water pressure valves such as pressure control valves, flow control valves, and switch valves have emerged, and together with other components form underwater hydraulic working systems. Existing underwater working equipment generally adopts the method of placing electrical related equipment in a dry tank, but as the working depth increases, the pressure resistance and sealing of the dry tank will be significantly reduced, and even damage will be caused to the internal components. In order to solve the problem that the pressure of underwater hydraulic working equipment in the deep sea is greatly affected by the outside world and affects its own characteristics during operation, the present invention adopts the form of an oil tank plus an external compensator to balance the internal pressure of the oil tank with the external environmental pressure, greatly increasing the reliability of the seal, and enabling the switch valve to work in a deep water environment. Summary of the Invention

[0003] Based on the above technical problems that the current use of underwater hydraulic components is easily affected by the ambient water pressure and the electromechanical converter cannot work directly underwater, an underwater water pressure electromagnetic switch valve with a valve core pressure balance and compensation oil tank is provided.

[0004] The technical means adopted in the present invention are as follows:

[0005] An underwater hydraulic electromagnetic on-off valve with a valve core pressure balance and compensation oil tank, comprising a valve core guide cover plate, a valve body, an electromagnetic push rod and an oil tank connected in sequence from top to bottom;

[0006] A return spring installation cavity is defined in the valve core guide cover plate; a spring adjustment piston and a return spring are installed in the return spring installation cavity, and the spring adjustment piston presses on the top of the return spring; an adjustment screw having one end connected to the spring adjustment piston is also installed on the top of the return spring installation cavity, and is used to adjust the initial pre-compression amount of the return spring by pushing the spring adjustment piston;

[0007] A stepped through hole is provided in the center of the valve body, penetrating the upper and lower surfaces; the reset spring mounting cavity is connected to the stepped through hole; the upper portion of the stepped through hole is a valve core assembly cavity, and the lower portion is an electromagnet push rod movement cavity; the diameter of the valve core assembly cavity is larger than the diameter of the electromagnet push rod movement cavity; the side of the valve body is provided with a water inlet I and a water outlet I connected to the valve core assembly cavity, as well as an oil tank refueling port I connected to the electromagnet push rod movement cavity; the water inlet I is located above the water outlet I;

[0008] A valve core and a valve sleeve are installed in the valve body;

[0009] The valve core is a stepped shaft structure, and is divided into a spring mounting section, a guide section, a conical sealing section, a transition section, a threaded mounting section, and an electromagnetic push rod contact section from top to bottom; the diameters gradually decrease from the guide section to the transition section, the threaded mounting section, and the electromagnetic push rod contact section; the diameter of the spring mounting section is smaller than that of the guide section; the upper portions of the spring mounting section and the guide section extend into the reset spring mounting cavity; the top surface of the guide section is a spring force contact surface; the lower portion of the reset spring is sleeved on the spring mounting section and rests against the spring force contact surface; the bottom of the electromagnetic push rod contact section is a spherical surface;

[0010] The valve sleeve is installed in the valve core assembly cavity and is located below the water inlet I; the lower end of the valve sleeve is in contact with the bottom surface of the valve core assembly cavity; a through hole is provided in the center of the valve sleeve, which passes through the upper and lower surfaces, and the through hole can be connected with the water inlet I through the valve core assembly cavity; the lower part of the valve core passes through the through hole and extends into the electromagnetic push rod movement cavity, and the top opening of the through hole is a valve port cone surface, and the valve port cone surface and the cone surface sealing section cooperate with each other to form a valve port, and the valve port cone surface can cooperate with the cone surface sealing section to form a line contact seal;

[0011] The valve sleeve is provided with a circle of valve sleeve annular grooves on the side surface, and four valve sleeve circulation holes are spaced apart along the circumferential direction in the valve sleeve annular groove. The valve sleeve circulation holes are connected to the water outlet I through the valve sleeve annular grooves, and the through holes are connected to the water outlet I through the valve sleeve circulation holes.

[0012] A balancing piston is installed in the through hole, and the balancing piston is connected to the threaded mounting section via a thread; the side surface of the balancing piston contacts and seals with the inner surface of the through hole; the top of the balancing piston can contact and seal with the transition section;

[0013] A cavity is provided in the oil tank, and the cavity is filled with insulating oil; the electromagnetic push rod includes an electromagnet and an electromagnet push rod; a coil mounting frame for mounting a coil is provided outside the electromagnet; the top of the electromagnet is installed in the electromagnet push rod motion cavity and is located below the oil tank oil filling port I, and the other part is located in the cavity; the electromagnet push rod is provided on the top of the electromagnet; the electromagnet is located in the cavity; the electromagnet push rod is in contact with the electromagnet push rod contact section.

[0014] Furthermore, a spring adjustment threaded hole connected to the return spring installation cavity is provided on the top of the valve core guide cover plate for installing the adjusting screw; a positioning groove for installing the adjusting screw is provided at the center of the upper surface of the spring adjustment piston; the flange structure at the bottom of the valve core guide cover plate is connected to the inner side of the upper part of the valve core assembly cavity through threads; the valve core guide cover plate is fixedly installed on the top of the valve body by screws, and a number of countersunk through holes for installing the screws are provided on the valve core guide cover plate.

[0015] Furthermore, a return spring installation chamber flow hole connected to the return spring installation chamber is provided on the valve core guide cover plate; there is a gap between the side surface of the spring adjusting piston and the inner side wall of the return spring installation chamber, and a flow channel is provided on the side surface of the spring adjusting piston; the return spring installation chamber can be connected to the external environment through the gap between the spring adjusting piston and the return spring installation chamber, the flow channel and the return spring installation chamber flow hole.

[0016] Furthermore, in the initial state of the underwater water pressure electromagnetic switch valve, under the action of the reset spring, the valve core presses against the valve sleeve, the conical sealing section forms a line contact seal with the conical surface of the valve port, and the valve port is closed.

[0017] Furthermore, the valve core can make axial movement under the action of the return spring and the electromagnetic push rod. During the axial movement of the valve core, the part of the guide section located in the return spring installation cavity cooperates with the return spring installation cavity to guide the movement of the valve core; when the valve core moves axially to the point where the conical surface of the valve port forms a line contact seal with the conical surface sealing section, the valve port is closed; when the valve core moves axially to the point where the conical surface sealing section is away from the conical surface of the valve port, the valve port is opened.

[0018] Furthermore, the oil tank is provided with an oil tank filling port II, a compensator connection port and a watertight connector installation port connected to the cavity; the oil tank filling port II and the oil tank filling port I can be connected through a detachable external adapter and a hydraulic pipe; the compensator connection port is used for an external compensator, and the compensator is used to balance the internal pressure of the cavity with the external environmental pressure; the watertight connector installation port is used to install an external power supply, and the external power supply is used to power the electromagnetic push rod.

[0019] Furthermore, after the oil tank filling port II is connected to the oil tank filling port I through an external adapter and a hydraulic pipe, the electromagnetic push rod movement cavity is also filled with insulating oil, so that the internal pressure of the electromagnetic push rod movement cavity is equal to the cavity pressure.

[0020] Furthermore, the top of the electromagnet is installed in the electromagnet push rod motion cavity through a thread, the electromagnet push rod motion cavity is coaxial with the electromagnet, and a sealing ring VII is installed between the electromagnet push rod motion cavity and the electromagnet to separate the interior of the oil tank from the electromagnet push rod motion cavity.

[0021] Furthermore, the valve core guide cover plate and the valve body are sealed by installing a sealing ring I; the balancing piston and the inner side wall of the through hole of the valve sleeve are sealed by installing a sealing ring IV and a sealing ring VI; the guide section and the inner side wall of the reset spring installation cavity are sealed by installing a sealing ring II; the valve sleeve and the inner side wall of the valve core assembly cavity are sealed by installing a sealing ring III and a sealing ring V.

[0022] Furthermore, the axial diameter of the balancing piston is d3, the maximum diameter of the guide section of the valve core is d1, and the diameter of the line contact seal formed between the conical sealing section and the conical surface of the valve port is d4, wherein d1=d3, and d4 is slightly smaller than d1.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The underwater water pressure electromagnetic switch valve with a valve core pressure balancing and compensation oil tank provided by the present invention adopts an oil tank to protect the electromagnet part, and ensures that the internal pressure of the oil tank is balanced with the external environmental pressure through a compensator connected to the oil tank; the opening and closing of the valve port depends on the combined action of the electromagnet push rod and the return spring on the valve core; there is a return spring adjustment piston in the valve for adjusting the pre-compression amount of the return spring, and the pre-compression amount of the return spring can be manually adjusted by adjusting the adjustment screw.

[0025] 2. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank provided by the present invention can be placed underwater for operation as a whole, and the pressure inside the valve can be balanced through an external compensator; the oil tank has good oil tightness, which improves the sealing performance of the electromagnetic switch valve and can achieve operation in a deep underwater environment; and the underwater electromagnetic switch valve can be remotely controlled to open and close through control signals on the water.

[0026] Based on the above reasons, the present invention can be widely promoted in the field of electromagnetic switch valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 Schematic diagram of the structure of the underwater water pressure electromagnetic switch valve;

[0029] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0030] Figure 3 is a cross-sectional view of the valve core guide cover plate;

[0031] Figure 4 This is a schematic diagram of the structure of the valve core guide cover plate from a top view;

[0032] Figure 5 Schematic diagram of the valve core structure;

[0033] Figure 6 is a cross-sectional view of the valve body;

[0034] Figure 7 It is a schematic diagram of the force applied to the valve core when the valve port of the underwater water pressure electromagnetic switch valve is closed;

[0035] Figure 8 It is a schematic diagram of the force applied to the valve core when the valve port of the underwater water pressure electromagnetic switch valve is opened;

[0036] Figure 9 This is a schematic diagram of the spring regulating piston structure;

[0037] Figure 10 2 is a cross-sectional view of the valve sleeve.

[0038] Figure: 1. Spring adjustment piston; 2. Return spring; 3. Valve core guide cover; 4. Valve core; 5. Valve body; 6. Valve sleeve; 7. Balancing piston; 8. Hexagonal nut; 9. Electromagnet push rod; 10. Electromagnet; 11. Oil tank; 12. Seal ring I; 13. Seal ring II; 14. Seal ring III; 15. Seal ring IV; 16. Seal ring V; 17. Seal ring VI; 18. Seal ring VII; 19. Coil mounting frame; 101. Flow channel; 301. Return spring mounting cavity; 302. Spring adjustment threaded hole; 303-306: Return spring mounting cavity Flow hole; 307~310: countersunk through hole; 401, spring force contact surface; 402, guide section; 403, conical sealing section; 404, transition section; 405, threaded installation section; 406, electromagnet push rod contact section; 501, valve core installation cavity; 502, water inlet; 503, water outlet; 504, electromagnet push rod movement cavity; 505, oil tank oil filling port I; 601, valve sleeve annular groove; 602 valve sleeve flow hole; 603, valve sleeve conical surface; 1101, compensator connection port; 1102, watertight connector installation port; 1103, oil tank oil filling port II. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0043] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] Example 1

[0047] like Figure 1-10 As shown, the present invention provides an underwater water pressure electromagnetic switch valve with a valve core pressure balance and compensation oil tank, comprising a valve core guide cover plate (3), a valve body (5), an electromagnetic push rod and an oil tank (11) connected in sequence from top to bottom;

[0048] A return spring installation cavity (301) is provided in the valve core guide cover plate (3); a spring adjustment piston (1) and a return spring (2) are installed in the return spring installation cavity (301), and the spring adjustment piston (1) is pressed on the top of the return spring (2); an adjustment screw with one end connected to the spring adjustment piston (1) is also installed on the top of the return spring installation cavity (301), and is used to adjust the initial pre-compression amount of the return spring (2) by pushing the spring adjustment piston (1);

[0049] The center of the valve body (5) is provided with a stepped through hole that passes through the upper and lower surfaces, and the reset spring installation cavity (301) is connected to the stepped through hole; the upper part of the stepped through hole is a valve core assembly cavity (501), and the lower part is an electromagnet push rod movement cavity (504), and the diameter of the valve core assembly cavity (501) is larger than the diameter of the electromagnet push rod movement cavity (504); the side of the valve body (5) is provided with a water inlet I (502) and a water outlet I (503) that are connected to the valve core assembly cavity (501), and an oil tank oil replenishment port I (505) that is connected to the electromagnet push rod movement cavity (504); the water inlet I (502) is located above the water outlet I (503);

[0050] A valve core (4) and a valve sleeve (6) are installed in the valve body (5);

[0051] The valve core (4) is a stepped shaft structure, and is divided into a spring installation section, a guide section (402), a conical sealing section (403), a transition section (404), a threaded installation section (405) and an electromagnet push rod contact section (406) from top to bottom; the diameters of the guide section (402) to the transition section (404), the threaded installation section (405) and the electromagnet push rod contact section (406) gradually decrease; the diameter of the spring installation section is smaller than that of the guide section (402); the upper parts of the spring installation section and the guide section (402) extend into the reset spring installation cavity (301), the top surface of the guide section (402) is a spring force contact surface (401), the lower part of the reset spring (2) is sleeved on the spring installation section and abuts against the spring force contact surface (401); the bottom of the electromagnet push rod contact section (406) is a spherical surface;

[0052] The valve sleeve (6) is installed in the valve core assembly cavity (501) and is located below the water inlet I (502); the lower end of the valve sleeve (6) contacts the bottom surface of the valve core assembly cavity (501); a through hole is provided in the center of the valve sleeve (6) and passes through the upper and lower surfaces, and the through hole can be connected to the water inlet I (502) through the valve core assembly cavity (501); the lower part of the valve core (4) passes through the through hole and extends into the electromagnet push rod movement cavity (504), and the top opening of the through hole is a valve port cone surface (603), and the valve port cone surface (603) and the cone surface sealing section (403) cooperate with each other to form a valve port, and the valve port cone surface (603) can cooperate with the cone surface sealing section (403) to form a line contact seal;

[0053] The valve sleeve (6) is provided with a circle of valve sleeve annular grooves (601) on the side surface, and four valve sleeve circulation holes (602) are provided in the valve sleeve annular groove (601) at intervals along the circumferential direction, and the valve sleeve circulation holes (602) are connected to the water outlet I (503) through the valve sleeve annular groove (601), and the through hole is connected to the water outlet I (503) through the valve sleeve circulation holes (602);

[0054] A balancing piston (7) is installed in the through hole. Considering the convenience of installing the valve core (4), the balancing piston (7) is connected to the threaded installation section (405) through the central threaded hole and fixed by the hexagonal nut (8) at the bottom; the side surface of the balancing piston (7) contacts and seals with the inner surface of the through hole; the top of the balancing piston (7) can contact and seal with the transition section (404);

[0055] A cavity is provided in the oil tank (11), and the cavity is filled with insulating oil; the electromagnetic push rod comprises an electromagnet (10) and an electromagnet push rod (9); a coil mounting frame (19) for mounting a coil is provided outside the electromagnet (10); the top of the electromagnet (10) is installed in the electromagnet push rod motion cavity (504) and is located below the oil tank oil filling port I (505), and the other parts are located in the cavity; the electromagnet (10) is provided with the electromagnet push rod (9); The electromagnet (10) is located in the cavity; the electromagnet push rod (9) is in contact with the electromagnet push rod contact section (406); the electromagnet push rod movement chamber (504) plays a role in positioning and installing the electromagnet (10); when the electromagnet (10) is energized, the electromagnet push rod (9) extends out of the electromagnet push rod movement chamber (504), pushes the electromagnet push rod contact section (406), and then pushes the valve core (4) to move axially upward, so that the valve port is opened.

[0056] Furthermore, the return spring installation chamber (301), the valve core assembly chamber (501) and the electromagnet push rod movement chamber (504) are coaxial; the return spring installation chamber (301) is coaxial with the valve core (4).

[0057] Furthermore, the flange structure at the bottom of the valve core guide cover plate (3) is connected to the inner side of the upper portion of the valve core assembly cavity (501) via threads.

[0058] Furthermore, a spring adjustment threaded hole (302) connected to the reset spring installation cavity (301) is provided on the top of the valve core guide cover plate (3) for installing the adjustment screw; a positioning groove for installing the adjustment screw is provided at the center of the upper surface of the spring adjustment piston (1); when adjusting the initial pre-compression amount of the reset spring (2), the spring adjustment piston (1) can be steadily pushed by the adjustment screw, and the positioning groove is used to play a positioning and centering role when the adjustment screw pushes the spring adjustment piston (1).

[0059] Furthermore, the valve core guide cover plate (3) is provided with a return spring installation cavity flow hole (303-306) connected to the return spring installation cavity (301); there is a gap between the side surface of the spring regulating piston (1) and the inner side wall of the return spring installation cavity (301), and the side surface of the spring regulating piston (1) is provided with a flow channel (101); the return spring installation cavity (301) can be connected to the external environment through the gap between the spring regulating piston (1) and the return spring installation cavity (301), the flow channel (101) and the return spring installation cavity flow hole (303-306), so that the pressure in the return spring installation cavity (301) is equal to the external environment pressure.

[0060] Furthermore, the return spring installation cavity flow holes (303-306) are located around the spring adjustment threaded hole (302).

[0061] Furthermore, the return spring installation cavity (301) is a cylindrical cavity, the spring regulating piston (1) is a cylindrical structure, and the left and right side surfaces are arcs capable of contacting the return spring installation cavity (301) and are provided with the flow channel (101), and the front and rear side surfaces are planes capable of forming a gap with the return spring installation cavity (301).

[0062] Furthermore, in the initial state of the underwater water pressure electromagnetic switch valve, under the action of the reset spring (2), the valve core (4) presses against the valve sleeve (6), the conical sealing section (403) and the valve port conical surface (603) form a line contact seal, and the valve port is closed.

[0063] Furthermore, the valve core (4) can make axial movement under the action of the reset spring (2) and the electromagnetic push rod. During the axial movement of the valve core (4), the part of the guide section (402) located in the reset spring installation cavity (301) cooperates with the reset spring installation cavity (301) to guide the movement of the valve core (4); when the valve core (4) moves axially to the point where the conical surface (603) of the valve port forms a line contact seal with the conical surface sealing section (403), the valve port is closed; when the valve core (4) moves axially to the point where the conical surface sealing section (403) is away from the conical surface (603) of the valve port, the valve port is opened.

[0064] Furthermore, when the valve port is opened, water can flow from the water inlet I (502) to the water outlet I (503).

[0065] Furthermore, the oil tank (11) is provided with an oil tank filling port II (1103) connected to the cavity, a compensator connection port (1101) and a watertight connector installation port (1102); the oil tank filling port II (1103) and the oil tank filling port I (505) can be connected via a detachable external adapter and a hydraulic pipe; the compensator connection port (1101) is used for connecting an external compensator, and the compensator is used to balance the internal pressure of the cavity with the external environmental pressure. Since the internal pressure of the cavity is equal to the internal pressure of the electromagnetic push rod movement chamber (504), the internal pressure of the electromagnetic push rod movement chamber (504) is also balanced with the external environmental pressure; the watertight connector installation port (1102) is used for installing an external power supply, and the external power supply is used to power the electromagnetic push rod.

[0066] Furthermore, after the oil tank filling port II (1103) and the oil tank filling port I (505) are connected via an external adapter and a hydraulic pipe, the electromagnetic push rod movement chamber (504) is also filled with insulating oil, so that the internal pressure of the electromagnetic push rod movement chamber (504) is equal to the pressure of the cavity.

[0067] Furthermore, the top of the electromagnet (10) is installed in the electromagnet push rod motion chamber (504) through a thread, the electromagnet push rod motion chamber (504) and the electromagnet (10) are coaxial, and a sealing ring VII (18) is installed between the electromagnet push rod motion chamber (504) and the electromagnet (10) to separate the interior of the oil tank (11) from the electromagnet push rod motion chamber (504).

[0068] Furthermore, a plurality of return spring installation cavity flow holes (303-306) connected to the return spring installation cavity (301) are provided on the top of the valve core guide cover plate (3) around the spring adjustment threaded hole (302); and a flow channel (101) is provided on the side of the spring adjustment piston (1).

[0069] Furthermore, the valve core guide cover plate (3) is fixedly mounted on the valve body (5) by screws, and a plurality of countersunk through holes (307-310) for mounting the screws are provided on the valve core guide cover plate (3).

[0070] Furthermore, the valve core guide cover plate (3) and the valve body (5) are sealed by installing a sealing ring I (12); the balancing piston (7) and the inner side wall of the through hole of the valve sleeve (6) are sealed by installing a sealing ring IV (15) and a sealing ring VI (17); the guide section (402) and the inner side wall of the return spring installation cavity (301) are sealed by installing a sealing ring II (13); and the valve sleeve (6) and the inner side wall of the valve core assembly cavity (501) are sealed by installing a sealing ring III (14) and a sealing ring V (16).

[0071] Furthermore, the bottom surface of the valve core guide cover plate (3), the inner side wall of the return spring installation cavity (301), the inner side wall of the valve core assembly cavity (501) and the side surface of the balance piston (7) are respectively provided with sealing grooves for installing sealing rings.

[0072] Furthermore, the axial diameter of the balancing piston (7) is d3, the maximum diameter of the guide section (402) of the valve core (4) is d1, the diameter of the transition section (404) is d2, and the diameter of the line contact seal formed between the conical sealing section (403) and the valve port conical surface (603) is d4, wherein d1=d3, and d4 is slightly smaller than d1.

[0073] During underwater use, the underwater hydraulic solenoid switch valve of the present invention uses the thrust provided by the pre-compression of the return spring to push the valve core against the valve sleeve to close the valve port. The thrust provided by the push rod when the electromagnet is energized causes the valve port to open. The opening of the valve port can be adjusted by adjusting the compression of the return spring and the energization of the electromagnet. The force applied to the valve core in the valve port open / close state is as follows:

[0074] When the valve port is closed, the state of the balancing piston (7) and the valve core (4) on the valve sleeve (6) is as follows: Figure 7 As shown:

[0075] F1 is the downward thrust provided by the return spring 2 under the initial pre-compression amount, and F2 is the upward thrust provided by the electromagnet 10 when it is energized;

[0076] P1 is the pressure of the chamber where the water inlet 1502 is located, P2 is the pressure of the chamber where the water outlet 1503 is located, P3 is the pressure of the chamber where the spring installation section is located, and P4 is the pressure of the chamber where the electromagnet push rod contact section 406 is located, which is also the pressure inside the oil tank 11;

[0077] Since the spring adjustment piston 1 itself is provided with a flow passage 101, the spring adjustment threaded hole 302 of the valve core guide cover plate 3 is also provided with return spring installation cavity flow holes 303 to 306 that can be connected to the external environment. The pressure of the return spring installation cavity 301 where the return spring 2 is located is the external environmental pressure, and the spring installation section of the valve core 4 is located in the return spring installation cavity 301, that is, the pressure on the spring installation section is the environmental pressure P3;

[0078] The pressure at the position where the electromagnet push rod contact section 406 is located is the pressure P4 inside the oil tank 11, and the pressure of the oil tank 11 is balanced with the outside through the external compensator;

[0079] The pressure of the oil tank 11 acts indirectly on the valve core 4 through the balancing piston 7. The area of ​​the balancing piston 7 is and the axial area of ​​the maximum diameter d1 of the valve core 4 Equal, that is, the force-bearing areas on the upper and lower sides of the valve core 4 are equal, so the force on the valve core 4 caused by the pressure F3 = A1 × P3 of the cavity where the spring installation section is located and the force F4 = A3 × P4 on the valve core 4 caused by the pressure of the cavity where the electromagnet push rod contact section 406 is located are equal and cancel each other out;

[0080] At this time, the valve core 4 is subjected to a total upward force

[0081] The valve core 4 is subjected to a total downward force

[0082] Since F4 = F3, d1 = d3, the solenoid is not energized when the valve port is closed, and F2 = 0;

[0083] The force on the valve core 4 when the valve port is closed is The downward thrust F1 provided by the return spring 2 should be greater than the force exerted by the pressure difference between the water inlet I502 and the water outlet I503 on the valve core diameter d1-d4 part, and the direction is downward.

[0084] When the valve port is open, the state of the balancing piston 7 and the valve core 4 on the valve sleeve 6 is as follows: Figure 8 As shown:

[0085] Since the valve port is open, the water inlet I502 and the water outlet I503 are connected and belong to the same pressure zone P5; since d1 = d3, the hydraulic forces of the water inlet I502 and the water outlet I503 on the valve core 4 cancel each other out.

[0086] At this time, the valve core 4 is subjected to a total upward force F x '=F2;

[0087] The valve core 4 is subjected to a total downward force F y '=F1;

[0088] Since the size of F1 depends on the compression amount and elastic coefficient of the return spring 2, when the return spring 2 is compressed to F1=F2 or the electromagnet push rod 9 reaches the maximum working stroke, the valve port opening reaches the maximum. At this time, the underwater water pressure electromagnetic switch valve is fully opened, and the high-pressure water of the system can start to flow.

[0089] The initial hydraulic pressure balance of the underwater water pressure electromagnetic switch valve of the present invention is composed of the valve core and the balance piston installed thereon. The underwater water pressure electromagnetic switch valve can be used for unloading underwater hydraulic equipment and any occasion where the hydraulic circuit needs to be controlled.

[0090] The following describes, in conjunction with Examples 1-2, how to ensure that the electrical equipment inside the valve is not damaged by external water and affected in operation when the underwater hydraulic solenoid switch valve of the present invention is used underwater.

[0091] Example 1

[0092] In this embodiment, the oil tank filling port I505 on the valve body 5 and the oil tank filling port II1103 on the oil tank 11 are connected through an external adapter and a hydraulic pipe, and a compensator is connected to the compensator connection port 1101 of the oil tank 11;

[0093] The water inlet I502 is connected to the water inlet side of the valve port. The preload force applied to the return spring 2 can be adjusted by turning the adjusting screw. The water outlet I503 is connected to the water outlet side of the valve port. The electromagnet 10 can be energized to enable the electromagnet push rod 9 inside it to push the valve core 4 to fully open the valve port, thereby realizing the flow of the underwater electromagnetic switch valve.

[0094] like Figure 8 As shown, since the spring adjustment piston 1 itself is provided with a flow passage 101, and the spring adjustment threaded hole 302 of the valve core guide cover plate 3 is also surrounded by return spring installation chamber flow holes 303 to 306 that are connected to the outside world, the pressure of the return spring installation chamber 301 where the return spring 2 is located is the external environmental pressure, and the spring installation section of the valve core 4 is located in the return spring installation chamber 301, that is, the liquid pressure on the spring installation section of the valve core 4 is the environmental pressure;

[0095] The electromagnetic push rod movement chamber 504 is filled with insulating oil and is separated from the water outlet side of the valve port by the balancing piston 7. Since the oil tank oil replenishment port I505 on the valve body 5 and the oil tank oil replenishment port II1103 on the oil tank 11 are connected via an external adapter and hydraulic pipe, the oil in the electromagnetic push rod movement chamber 504 is connected to the pressure in the oil tank 11 and the pressure in the electromagnetic push rod movement chamber 504 through the pipe connecting the oil tank oil replenishment port I505 and the oil tank oil replenishment port II1103, so that the pressure inside the oil tank 11 and the pressure in the electromagnetic push rod movement chamber 504 are in the same pressure range and the pressures are equal.

[0096] The oil tank 11 is filled with insulating oil, and the electromagnet 10 is located inside the oil tank 11. The oil tank 11 is provided with an oil tank filling port II 1103, a compensator connection port 1101, and a watertight connector installation port 1102. The compensator connection port 1101 is used to connect an external compensator, which can balance the external environmental pressure with the internal pressure of the oil tank 11. Since the pressure in the electromagnet push rod movement chamber 504 is equal to that in the oil tank 11, the pressure in the electromagnet push rod movement chamber 504 is also balanced with the ambient pressure, and the electromagnet push rod and the magnetic core inside are protected from corrosion by external water.

[0097] The electromagnetic push rod 9 can push the valve core 4 to move by energizing the switch electromagnet 10, so that the valve port is fully opened to realize the on-off of the system hydraulic circuit.

[0098] Example 2

[0099] In this embodiment, it is not necessary to connect the oil tank filling port I505 with the oil tank filling port II1103, and the oil tank filling port II1103 does not need to be blocked. The compensator connection port 1101 also does not need to be connected to the compensator. The liquid flowing into the electromagnetic push rod movement chamber 504 is water from the external environment, which can be isolated from the insulating oil in the oil tank 11 by the sealing ring VII18, preventing the liquid in the electromagnetic push rod movement chamber 504 from seeping into the interior of the oil tank 11. The liquid in the electromagnetic push rod movement chamber 504 in this embodiment and in Example 1 is insulating oil, which is a two-way sealing method.

[0100] Due to the provision of sealing ring Ⅶ18, the liquid in the electromagnet push rod movement chamber 504 cannot penetrate into the interior of the oil tank 11. When the electromagnet 10 is energized, it only moves the electromagnet push rod 9 in the electromagnet push rod movement chamber 504, so the oil tank oil replenishing port II1103 can be blocked, and the oil tank oil replenishing port I505 is connected to the external environment. That is, at this time, the pressure in the electromagnet push rod movement chamber 504 is the external environment pressure, and the pressure in the reset spring installation chamber 301 is also the external environment pressure. The pressures at both ends of the valve core 4 are balanced, and the movement of the valve core 4 depends entirely on the pressure of the cavity at the water inlet I, the pressure of the cavity at the water inlet I, the reset spring force and the electromagnet thrust.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank, It is characterized in that It comprises a valve core guide cover plate (3), a valve body (5), an electromagnetic push rod and an oil tank (11) which are connected in sequence from top to bottom; A return spring installation cavity (301) is provided in the valve core guide cover plate (3); a spring adjustment piston (1) and a return spring (2) are installed in the return spring installation cavity (301), and the spring adjustment piston (1) is pressed on the top of the return spring (2); an adjustment screw with one end connected to the spring adjustment piston (1) is also installed on the top of the return spring installation cavity (301), and is used to adjust the initial pre-compression amount of the return spring (2) by pushing the spring adjustment piston (1); The center of the valve body (5) is provided with a stepped through hole penetrating the upper and lower surfaces, and the reset spring installation cavity (301) is connected to the stepped through hole; the upper part of the stepped through hole is a valve core assembly cavity (501), and the lower part is an electromagnet push rod movement cavity (504), and the diameter of the valve core assembly cavity (501) is larger than the diameter of the electromagnet push rod movement cavity (504); the side of the valve body (5) is provided with a water inlet I (502) and a water outlet I (503) connected to the valve core assembly cavity (501) and an oil tank refueling port I (505) connected to the electromagnet push rod movement cavity (504); the water inlet I (502) is located above the water outlet I (503); A valve core (4) and a valve sleeve (6) are installed in the valve body (5); The valve core (4) is a stepped shaft structure, and is divided into a spring installation section, a guide section (402), a conical sealing section (403), a transition section (404), a threaded installation section (405) and an electromagnet push rod contact section (406) from top to bottom; the diameters of the guide section (402), the transition section (404), the threaded installation section (405) and the electromagnet push rod contact section (406) gradually decrease; the diameter of the spring installation section is smaller than that of the guide section (402); the upper parts of the spring installation section and the guide section (402) extend into the reset spring installation cavity (301), the top surface of the guide section (402) is a spring force contact surface (401), the lower part of the reset spring (2) is sleeved on the spring installation section and abuts against the spring force contact surface (401); the bottom of the electromagnet push rod contact section (406) is a spherical surface; The valve sleeve (6) is installed in the valve core assembly cavity (501) and is located below the water inlet I (502); the lower end of the valve sleeve (6) contacts the bottom surface of the valve core assembly cavity (501); a through hole penetrating the upper and lower surfaces is provided in the center of the valve sleeve (6), and the through hole can be connected with the water inlet I (502) through the valve core assembly cavity (501); the lower part of the valve core (4) passes through the through hole and extends into the electromagnet push rod movement cavity (504), and the top opening of the through hole is a valve port cone surface (603), and the valve port cone surface (603) and the cone surface sealing section (403) cooperate with each other to form a valve port, and the valve port cone surface (603) can cooperate with the cone surface sealing section (403) to form a line contact seal; The valve sleeve (6) is provided with a circle of valve sleeve annular grooves (601) on the side surface, and four valve sleeve circulation holes (602) are arranged in the valve sleeve annular groove (601) at intervals along the circumferential direction, and the valve sleeve circulation holes (602) are connected to the water outlet I (503) through the valve sleeve annular groove (601), and the through hole is connected to the water outlet I (503) through the valve sleeve circulation holes (602); A balancing piston (7) is installed in the through hole, and the balancing piston (7) is connected to the threaded installation section (405) through a thread; the side surface of the balancing piston (7) contacts and seals with the inner surface of the through hole; the top of the balancing piston (7) can contact and seal with the transition section (404); A cavity is provided in the oil tank (11), and the cavity is filled with insulating oil; the electromagnetic push rod comprises an electromagnet (10) and an electromagnet push rod (9); a coil mounting frame (19) for mounting a coil is arranged outside the electromagnet (10); the top of the electromagnet (10) is mounted in the electromagnet push rod movement cavity (504) and is located below the oil tank refueling port I (505), and the other part is located in the cavity; the electromagnet push rod (9) is arranged on the top of the electromagnet (10); the electromagnet (10) is located in the cavity; the electromagnet push rod (9) is in contact with the electromagnet push rod contact section (406).

2. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The top of the valve core guide cover plate (3) is provided with a spring adjustment threaded hole (302) connected to the reset spring installation cavity (301) for installing the adjustment screw; the center of the upper surface of the spring adjustment piston (1) is provided with a positioning groove for installing the adjustment screw; the flange structure at the bottom of the valve core guide cover plate (3) is connected to the inner side of the upper part of the valve core assembly cavity (501) through threads; the valve core guide cover plate (3) is fixedly installed on the top of the valve body (5) by screws, and the valve core guide cover plate (3) is provided with a plurality of countersunk through holes for installing the screws.

3. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The valve core guide cover plate (3) is provided with a return spring installation chamber flow hole connected to the return spring installation chamber (301); there is a gap between the side of the spring adjustment piston (1) and the inner wall of the return spring installation chamber (301), and the side of the spring adjustment piston (1) is provided with a flow channel (101); the return spring installation chamber (301) can be connected to the external environment through the gap between the spring adjustment piston (1) and the return spring installation chamber (301), the flow channel (101) and the return spring installation chamber flow hole.

4. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that In the initial state of the underwater water pressure electromagnetic switch valve, under the action of the return spring (2), the valve core (4) presses against the valve sleeve (6), the conical surface sealing section (403) and the valve port conical surface (603) form a line contact seal, and the valve port is closed.

5. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The valve core (4) can make axial movement under the action of the return spring (2) and the electromagnetic push rod. During the axial movement of the valve core (4), the part of the guide section (402) located in the return spring installation cavity (301) cooperates with the return spring installation cavity (301) to guide the movement of the valve core (4); when the valve core (4) moves axially to the point where the conical surface (603) of the valve port forms a line contact seal with the conical surface sealing section (403), the valve port is closed; when the valve core (4) moves axially to the point where the conical surface sealing section (403) is away from the conical surface (603) of the valve port, the valve port is opened.

6. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The oil tank (11) is provided with an oil tank replenishing port II (1103) connected to the cavity, a compensator connection port (1101) and a watertight connector installation port (1102); the oil tank replenishing port II (1103) and the oil tank replenishing port I (505) can be connected via a detachable external adapter and a hydraulic pipe; the compensator connection port (1101) is used for an external compensator, and the compensator is used to balance the internal pressure of the cavity with the external environmental pressure; the watertight connector installation port (1102) is used to install an external power supply, and the external power supply is used to power the electromagnetic push rod.

7. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that After the oil tank replenishing port II (1103) is connected to the oil tank replenishing port I (505) via an external adapter and a hydraulic pipe, the electromagnetic push rod movement chamber (504) is also filled with insulating oil, so that the internal pressure of the electromagnetic push rod movement chamber (504) is equal to the cavity pressure.

8. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The top of the electromagnet (10) is installed in the electromagnet push rod movement chamber (504) through a thread, the electromagnet push rod movement chamber (504) is coaxial with the electromagnet (10), and a sealing ring Ⅶ (18) is installed between the electromagnet push rod movement chamber (504) and the electromagnet (10) to separate the interior of the oil tank (11) from the electromagnet push rod movement chamber (504).

9. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The valve core guide cover plate (3) and the valve body (5) are sealed by installing a sealing ring I (12); the balance piston (7) and the inner wall of the through hole of the valve sleeve (6) are sealed by installing a sealing ring IV (15) and a sealing ring VI (17); the guide section (402) and the inner wall of the return spring installation cavity (301) are sealed by installing a sealing ring II (13); the valve sleeve (6) and the inner wall of the valve core assembly cavity (501) are sealed by installing a sealing ring III (14) and a sealing ring V (16).

10. The underwater water pressure electromagnetic switch valve with valve core pressure balance and compensation oil tank according to claim 1, It is characterized in that The axial diameter of the balancing piston (7) is d 3 The maximum diameter of the guide section (402) of the valve core (4) is d 1 The diameter of the line contact seal formed between the conical sealing section (403) and the valve port conical surface (603) is d 4 , where d 1 =d 3 , d 4 Slightly smaller than d 1 .

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