A removable modular seal groove structure for a water-based hydraulic valve

Abstract

The application relates to a detachable combined sealing groove structure of a water-based hydraulic valve, which comprises a valve sleeve (1), a valve body (2), a valve core (3) and a sealing element (5). The valve sleeve (1) is installed on the valve body (2), the valve sleeve (1) and the valve body (2) are matched to form a detachable combined sealing groove (6), the sealing element (5) is installed in the detachable combined sealing groove (6), and the valve core (3) is installed in a valve hole (201) of the valve body (2) and the valve sleeve (1). The detachable combined sealing groove structure can clamp or clench the sealing element in the sealing groove, prevents the sealing element from being deformed due to high-pressure liquid impact or being flushed out of the sealing groove by the high-pressure liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing, in particular to a detachable combined sealing groove structure of a water-based hydraulic valve, which can provide a reliable sealing structure for the water-based hydraulic valve. BACKGROUND

[0002] The sealing mode of the traditional slide valve type reversing valve is gap sealing, and the leakage amount is large when water is used as the hydraulic transmission medium. In order to avoid the leakage problem of water medium in the slide valve, a sealing element is installed between each inlet / outlet port in the slide valve cavity, the sealing element can be in contact with the valve core shoulder to form a sealing band, thereby preventing the leakage of water medium between each inlet / outlet port. However, due to the large impact of high-pressure liquid at the moment of opening of the water-based slide valve, the sealing element will be knocked out of the sealing groove, causing sealing failure or valve core jamming, and further causing the reversing valve to fail.

[0003] Patent "Slide valve type hydraulic reversing valve with special sealing valve core structure" CN112762042A discloses a reversing valve with a slide valve structure suitable for high-pressure and water-based medium environment. One of the structures is a three-position four-way structure. The slide valve type reversing valve of this structure is installed with a sealing element between each adjacent inlet / outlet port in the valve cavity. During the opening or closing process of the slide valve, the instantaneous impact of the fluid is large. Due to the insufficient rigidity of the sealing element, it will be deformed under the impact of high-pressure fluid, and even be knocked out of the sealing groove, thereby affecting the performance and service life of the reversing valve. At the same time, the edge of the valve core shoulder will produce a shearing force on the sealing element when passing through the sealing element, which will bring the sealing element out of the groove, or cause extrusion of the sealing element, resulting in failure of the sealing element.

[0004] Therefore, it is urgent to invent a reliable sealing structure to avoid the problem of damage to the sealing element of the water-based reversing valve. SUMMARY

[0005] To solve the above problems, the present application provides a detachable combined sealing groove structure of a water-based hydraulic valve, which has a simple structure and high reliability, and can be widely applied in pure water, seawater, emulsion and other medium environments.

[0006] The technical scheme of the present application is as follows:

[0007] A detachable combined sealing groove structure of a water-based hydraulic valve, comprising a valve sleeve, a valve body, a valve core and a sealing element. The valve sleeve is installed in the valve body, and a detachable combined sealing groove is formed at the joint of the valve sleeve and the valve body. The sealing element is installed in the detachable combined sealing groove, and the valve core is installed in the valve hole of the valve body and the valve sleeve.

[0008] Specifically, the valve core moves left and right in the valve hole. When the valve core shoulder and the liquid passage are staggered to form an opening and the valve core shoulder or the valve core taper surface is not in contact with the sealing element, the fluid medium of the liquid passage flows to the valve hole, at which time the valve port is in an open state (as shown in Figure 3 When the valve core moves to the left and the valve core shoulder is in contact with the sealing element, a sealing band is formed, preventing the fluid medium of the liquid passage on the right side of the sealing element from flowing to the valve hole on the left side of the sealing element, at which time the valve port is in a closed state (as shown in Figure 4 .

[0009] Specifically, the outer side part of the sealing element is an axial protruding part close to the outer side surface of the sealing element, and the inner side part of the sealing element is a part close to the inner side surface of the sealing element. The axial dimension of the outer side part of the sealing element is greater than the axial dimension of the inner side part of the sealing element.

[0010] Specifically, the side surface of the sealing element can be a groove, a tooth-shaped groove, an arc-shaped groove, a wave-shaped groove, a sawtooth-shaped groove, or the like. Alternatively, the side surface of the sealing element is provided with a protruding structure, and the axial dimension of the protruding part is greater than the axial dimension of the inner side part of the sealing element, so that the valve sleeve and the valve body extrude and clamp the sealing element, preventing the sealing element from being taken out by the valve core shoulder or preventing the sealing element from being washed out of the sealing groove by the fluid medium. The inner side surface of the sealing element is in contact with the valve core shoulder to form a dynamic sealing surface, and the outer side surface of the sealing element and the side surface of the sealing element are in contact with the wall surface of the sealing groove to form a static sealing surface, so as to block the fluid leakage.

[0011] Specifically, the side surface of the sealing element is in a stepped shape, and the axial dimension of the stepped part close to the outer side surface of the sealing element is greater than the axial dimension of the stepped part close to the inner side surface of the sealing element.

[0012] Specifically, the sealing groove where the sealing element is located is detachably combined, and the sealing groove is composed of the valve body and the valve sleeve or composed of two adjacent valve sleeves. The valve sleeve or the valve body is detachable.

[0013] Specifically, the valve sleeve and the valve body cooperate to form a detachable combined sealing groove. The cross-sectional shape of the detachable combined sealing groove is the same as or similar to the cross-sectional shape of the sealing element, so as to clamp the sealing element in the detachable combined sealing groove.

[0014] The size and shape of the detachable combined sealing groove can be set according to the size and shape of the outer side surface of the sealing element, the inner side surface of the sealing element, and the side surface of the sealing element, so as to clamp the sealing element in the detachable combined sealing groove.

[0015] Regardless of the type of sealing element, the main purpose is to clamp the sealing element through the detachable combined sealing groove.

[0016] Specifically, a plurality of valve sleeves can be installed in the valve body, and two adjacent valve sleeves can form a detachable combined sealing groove for installing or clamping the sealing element.

[0017] Specifically, the inner side surface of the sealing element can be arc-shaped, conical, planar, wavy, or have a bionic texture.

[0018] Specifically, the sealing element installed in the detachable combined sealing groove can be a plurality of sealing elements combined together (including but not limited to the form of 521 and 522 combined together).

[0019] Specifically, a metal ring is installed in the polymer sealing element, and the metal ring and the polymer sealing element body can be detachable or integrated, which aims to clamp the sealing element and prevent the sealing element from being deformed and then being damaged by the hydraulic pressure or the moving valve core.

[0020] Specifically, a conical structure is arranged between the shoulder of the valve core and the valve stem, which can be a round angle, an oblique angle, a right angle structure, or any combination of the round angle, the oblique angle, and the right angle structure, which aims to reduce the shearing effect of the valve core shoulder on the sealing element when the valve core shoulder passes through the sealing element.

[0021] Specifically, the detachable combined sealing groove structure can be applied to two-position two-way slide valve structure, two-position three-way slide valve structure, three-position four-way slide valve structure, etc.

[0022] The technical effects brought by the technical scheme of the present application are as follows:

[0023] Ordinary oil-based slide valve type reversing valves do not have sealing rings in the valve cavity, and water-based slide valves have sealing elements in the valve cavity.

[0024] The edge of the convex shoulder of the spool valve core passes the seal when the spool valve core changes direction, and the common O-shaped ring, drum-shaped ring, rectangular ring and other seal rings are taken out of the groove by the convex shoulder of the spool valve core or are taken out of the groove by the fluid medium when being extruded by the spool valve core or being impacted by the fluid medium. Therefore, the axial dimension of the outer part of the seal is greater than the axial dimension of the inner part of the seal, or the side of the seal is provided with a special-shaped groove, such as a groove, a tooth-shaped groove or a wave-shaped groove, so as to clamp the seal in the detachable combined sealing groove formed by the cooperation of the valve sleeve and the valve body, and the purpose of preventing the seal ring from being taken out of the sealing groove by high-pressure liquid or being extruded out of the sealing groove by the spool valve core is achieved, and the reliability of the water-based hydraulic valve sealing is further ensured.

[0025] The present application can be applied to two-position two-way spool valve structure, two-position three-way spool valve structure, three-position four-way spool valve structure and the like, and can expand the use range of the water-based hydraulic valve. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a two-dimensional schematic view of the detachable combined sealing groove;

[0027] Figure 2 It is a three-dimensional schematic view of the detachable combined sealing groove;

[0028] Figure 3 It is a two-dimensional schematic view of the detachable combined sealing groove in the open state of the valve port;

[0029] Figure 4 It is a two-dimensional schematic view of the detachable combined sealing groove in the closed state of the valve port;

[0030] Figure 5 It is a schematic view of the detachable combined sealing groove;

[0031] Figure 6 It is a sectional view of the seal;

[0032] Figure 7 It is a partial view of the spool valve of the water-based hydraulic valve;

[0033] Figure 8 It is a sectional view of the seal with different structures;

[0034] Figure 9 It is a schematic view of the combined seal installed in the detachable combined sealing groove;

[0035] Figure 10 It is a sectional view of the high-molecular seal with a metal structure inside;

[0036] Figure 11 It is a schematic view of the water-based hydraulic spool valve of the detachable combined sealing groove composed of the valve body and the valve sleeve according to the present application;

[0037] Figure 12 Figure 1 is a schematic diagram of an embodiment of the water-based hydraulic slide valve reversing valve with detachable combined sealing groove composed of valve sleeves according to the present application;

[0038] Figure 13 Figure 2 is a schematic diagram of an embodiment of the water-based hydraulic slide valve reversing valve with detachable combined sealing groove composed of valve body and valve sleeve according to the present application.

[0039] In the figure:

[0040] 1 valve sleeve;

[0041] 2 valve body, 201 valve hole;

[0042] 3 valve core, 301 valve core shoulder, 302 valve core taper surface, 303 valve rod;

[0043] 4 liquid passage;

[0044] 5 sealing element, 501 outer diameter of sealing element, 502 inner diameter of sealing element, 503 axial dimension of outer side part of sealing element, 504 axial dimension of inner side part of sealing element, 505 outer side surface of sealing element, 506 inner side surface of sealing element, 507 side surface of sealing element, 511 side surface of sealing element is tooth-shaped structure, 512 side surface of sealing element is tooth-shaped structure, 513 side surface of sealing element is tooth-shaped structure, 514 side surface of sealing element is arc-shaped structure, 515 side surface of sealing element is wave-shaped structure, 516 side surface of sealing element is convex structure, 517 side surface of sealing element is sawtooth-shaped structure, 521 combined sealing element 1, 522 combined sealing element 2, 531 metal ring, 532 high polymer sealing element main body;

[0045] 6 detachable combined sealing groove, 601 detachable combined sealing groove wall;

[0046] 7-1 valve sleeve, 7-2 valve sleeve;

[0047] 8 water-based three-position four-way slide valve body;

[0048] 9 slide valve core;

[0049] 10-1 sealing element, 10-2 sealing element, 10-3 sealing element, 10-4 sealing element, 10-5 sealing element, 10-6 sealing element;

[0050] 11-1 sealing element for detachable combined sealing groove, 11-2 sealing element for detachable combined sealing groove;

[0051] 12-1 valve sleeve, 12-2 valve sleeve;

[0052] 13 valve sleeve;

[0053] 14 slide valve core;

[0054] P: inlet port P;

[0055] A: working port A;

[0056] B: working port B;

[0057] T: return port T. DETAILED DESCRIPTION

[0058] Embodiments of the present application will be described in more detail with reference to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0059] It should be understood that although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0060] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0061] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The present invention provides a detachable assembled sealing groove structure for a water-based hydraulic valve. The structure is simple, the reliability is high, and the structure can be widely used in pure water, seawater, emulsion and other media environments. The technical solution of the present invention is as follows:

[0063] A detachable combined sealing groove structure for a water-based hydraulic valve comprises a valve sleeve (1), a valve body (2), a valve core (3), and a sealing member (5). The valve sleeve (1) is mounted on the valve body (2), the joint of the valve sleeve (1) and the valve body (2) cooperates to form a detachable combined sealing groove (6), the sealing member (5) is mounted in the detachable combined sealing groove (6), and the valve core (3) is mounted in a valve hole (201) of the valve body (2) and the valve sleeve (1).

[0064] Specifically, the valve core (3) moves left and right in the valve hole (201). When the valve core shoulder (301) and the liquid hole (4) are staggered to form an opening and the valve core shoulder (301) or the valve core cone (302) is not in contact with the sealing member (5), the fluid medium in the liquid hole (4) flows to the valve hole (201), and the valve port is in an open state (such as Figure 3 As shown); when the valve core moves to the left, the valve core shoulder (301) contacts the seal (5), forming a sealing belt to prevent the fluid medium from the right side of the seal through the liquid hole (4) to flow to the valve hole (201) on the left side of the seal. At this time, the valve port is closed (as shown); Figure 4 shown).

[0065] Specifically, the outer portion of the seal is an axially protruding portion close to the outer side surface (505) of the seal, and the inner portion of the seal is a portion close to the inner side surface (506) of the seal, and the axial dimension (503) of the outer portion of the seal is greater than the axial dimension (504) of the inner portion of the seal.

[0066] Specifically, the side surface (507) of the seal is provided with a groove (511), a tooth-shaped groove (512, 513), an arc groove (514), a wave-shaped groove (515), a sawtooth groove (517), etc., or the side surface of the seal is a protruding structure (516), and the axial dimension of the protruding structure is larger than the axial dimension (504) of the inner part of the seal, so that the valve sleeve (1) and the valve body (2) can squeeze and clamp the seal (5), prevent the valve core shoulder (301) from carrying the seal (5) out when passing through the seal (5), or prevent the seal (5) from being flushed out of the sealing groove by the fluid medium. The inner side surface (506) of the seal contacts the valve core shoulder (301) to form a dynamic sealing surface, and the outer side surface (505) and the side surface (507) of the seal contact the sealing groove wall (601) to form a static sealing surface.

[0067] Specifically, the side surface (507) of the sealing member is stepped, and the axial dimension of the stepped portion close to the outer side surface of the sealing member is greater than that of the stepped portion close to the inner side surface.

[0068] Specifically, the detachable combined sealing groove (6) in which the sealing member (5) is located is combined, and is composed of the valve body (2) and the valve sleeve (1), or composed of two adjacent valve sleeves (1), and the valve sleeve (1) or the valve body (2) is detachable.

[0069] Specifically, the cross-sectional shape of the detachable combined sealing groove (6) formed by the valve sleeve (1) and the valve body (2) for clamping the sealing member is the same as or similar to the cross-sectional shape of the sealing member, so as to clamp the sealing member (5) in the detachable combined sealing groove (6).

[0070] The size and shape of the sealing groove can be set according to the size and shape of the outer side surface (505) of the sealing member, the inner side surface (506) of the sealing member, and the side surface (507) of the sealing member, so as to clamp the sealing member (5) in the detachable combined sealing groove (6).

[0071] Regardless of the type of sealing member, the main purpose is to clamp the sealing member (5) through the detachable combined sealing groove (6).

[0072] Specifically, a plurality of valve sleeves (1) can be installed in the valve body, and two adjacent valve sleeves (1) can form a detachable combined sealing groove (6) for installing or clamping the sealing member (5).

[0073] Specifically, the inner side surface (506) of the sealing member can be arc-shaped, conical, planar, wavy, or have a biomimetic texture, etc. The edges of the sealing member can be straight, bevel, or round, which facilitates the assembly of the sealing member and reduces the damage such as scratches and folds during assembly. The sealing member material includes but is not limited to polyurethane, rubber, and high polymer material, etc.

[0074] Specifically, the sealing member installed in the detachable combined sealing groove (6) can be a plurality of sealing members combined together (including but not limited to the form of 521 and 522).

[0075] Specifically, a metal ring (531) is installed in the high polymer sealing member, and the metal ring (531) and the high polymer sealing member body (532) are detachable or integrated, which is to clamp the sealing member, prevent the sealing member from deforming, and further prevent the sealing member from being flushed out of the sealing groove by hydraulic pressure or being taken out of the sealing groove by the moving valve core.

[0076] Specifically, a taper structure (302) is arranged between the shoulder (301) of the valve core and the valve stem (303), which can be a round angle, an oblique angle, a right angle structure, or any combination of the round angle, the oblique angle, and the right angle structure, etc., and the purpose is to reduce the shearing effect of the valve core shoulder (301) on the sealing element (5) when passing through the sealing element (5), and to prevent damage to the sealing ring.

[0077] Specifically, the detachable combined sealing groove structure can be applied to two-position two-way slide valve structure, two-position three-way slide valve structure, three-position four-way slide valve structure, etc.

[0078] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0079] Embodiment one

[0080] Referring to Figure 11 A water-based hydraulic slide valve type reversing valve with a detachable combined sealing groove composed of a valve body and a valve sleeve. Specifically, the water-based hydraulic valve is a three-position four-way slide valve, which includes a water-based hydraulic slide valve body (8), a valve sleeve (7-1, 7-2), a slide valve core (9), and sealing elements (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 11-1, 11-2); the valve body is internally provided with a valve hole matched with the slide valve core, the sealing element (11-1) between the working port A and the left side return port T is installed in the detachable combined sealing groove composed of the valve body (8) and the valve sleeve (7-1), the sealing element (11-2) between the working port B and the right side return port T is installed in the detachable combined sealing groove composed of the valve body (8) and the valve sleeve (7-2), and the valve body and the valve sleeve are both provided with multiple hole channels for communicating with the inlet and outlet liquid passages. The valve sleeve (7-1 / 7-2) and the valve body (8) clamp the sealing elements (11-1 / 11-2) between the return port T and the working port A or the working port B, preventing the sealing elements between the working port and the return port from being flushed out by the hydraulic pressure or being damaged by the valve core.

[0081] The working principle of a water-based hydraulic slide valve type reversing valve with a detachable combined sealing groove composed of a valve body and a valve sleeve is as follows:

[0082] Specifically, when the slide valve core (9) is in the middle position, the sealing element (10-3) and the sealing element (10-4) are in contact with the shoulder of the valve core (9), forming a sealing band to prevent fluid leakage from the inlet port P to other working ports.

[0083] Specifically, when the slide valve core (9) moves to the left to connect the P port and the B port, the sealing element (10-3) and the sealing element (11-2) are in contact with the two shoulders of the valve core (9), respectively, forming a sealing band to prevent fluid leakage from other working ports.

[0084] Specifically, when the spool valve core (9) moves to the right to communicate the P port and the A port, the sealing element (10-4) and the sealing element (11-1) are in contact with the two shoulders of the valve core (9) respectively to form a sealing band to prevent fluid leakage to other working ports.

[0085] In addition, in the embodiment, the spool valve core has three shoulders. If the number of the shoulders of the valve core is changed and the working principle described above is met, it is also considered as the embodiment.

[0086] Embodiment Two

[0087] Referring to Figure 12 A water-based hydraulic slide valve reversing valve with detachable combined sealing grooves is composed of a valve body and a plurality of valve sleeves. Specifically, the water-based hydraulic valve is a three-position four-way slide valve, which comprises a water-based hydraulic slide valve body (8), valve sleeves (7-1, 7-2, 12-1, 12-2, 13), a slide valve core (9), and sealing elements (10-1, 10-2, 10-5, 10-6, 10-7, 10-8, 10-9, 10-10, 11-1, 11-2, 11-3, 11-4). The valve body is internally provided with a valve hole matched with the slide valve core, and a plurality of valve sleeves are installed in the valve body. The valve sleeves and the valve sleeves can be matched to form detachable combined sealing grooves for installing the sealing elements. The valve sleeves (7-1 / 7-2) and the valve sleeves (12-1 / 12-2) clamp the sealing elements (11-1 / 11-2) between the return port T and the working ports A / B to prevent the sealing elements between the working ports A / B and the return port T from being damaged by hydraulic pressure or being damaged by the valve core. The valve sleeves (12-1 / 12-2) and the valve sleeves (13) clamp the sealing elements (11-3 / 11-4) between the working ports A / B and the inlet port P to prevent the sealing elements between the working ports A / B and the inlet port P from being damaged by hydraulic pressure or being damaged by the valve core. At the same time, sealing elements are installed on the outside of each valve sleeve to prevent fluid leakage between adjacent inlet and outlet ports.

[0088] The working principle of a water-based hydraulic slide valve reversing valve with detachable combined sealing grooves composed of a valve body and a plurality of valve sleeves is as follows:

[0089] Specifically, when the slide valve core (9) is in the middle position, the sealing element (11-3) and the sealing element (11-4) are in contact with the shoulder of the slide valve core (9) to form a sealing band to prevent fluid leakage of the inlet port P to other working ports.

[0090] Specifically, when the slide valve core (9) moves to the left to communicate the P port and the B port, the sealing element (11-3) and the sealing element (11-2) are in contact with the two shoulders of the slide valve core (9) respectively to form a sealing band to prevent fluid leakage to other working ports.

[0091] Specifically, when the spool valve core (9) moves to the right to connect the P port and the A port, the sealing element (11-4) and the sealing element (11-1) are in contact with the two shoulders of the spool valve core (9) respectively, forming a sealing band to prevent fluid leakage to other working ports;

[0092] In this embodiment, the spool valve core has three shoulders. If the number of the shoulders of the valve core is changed and the above working principle is met, it is also considered as this embodiment.

[0093] Embodiment three

[0094] Referring to Figure 13 A schematic diagram of a detachable combined sealing groove water-based hydraulic slide valve reversing valve composed of a valve body and a valve sleeve. Specifically, the water-based hydraulic valve is a three-position four-way slide valve, which comprises a water-based hydraulic slide valve body (8), a valve sleeve (7-1, 7-2), a slide valve core (14), sealing elements (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 11-1, 11-2); the valve body is provided with a valve hole matched with the slide valve core, the sealing element (11-1) between the working port A and the left return liquid port T is installed in the detachable combined sealing groove composed of the valve body (8) and the valve sleeve (7-1), the sealing element (11-2) between the working port B and the right return liquid port T is installed in the detachable combined sealing groove composed of the valve body (8) and the valve sleeve (7-2), and the valve body and the valve sleeve are provided with a plurality of hole channels for communicating with the inlet and outlet liquid channels. Its characteristics are that the valve sleeve (7-1 / 7-2) and the valve body (8) clamp the sealing element (11-1 / 11-2) between the return liquid port T and the working port A or the working port B, preventing the sealing element between the working port and the return liquid port from being flushed out by hydraulic pressure or damaged by the valve core.

[0095] Its working principle is as follows:

[0096] Specifically, when the slide valve core (14) is in the middle position, the sealing element (10-3) and the sealing element (10-4) are in contact with the shoulder of the slide valve core (9), forming a sealing band to prevent fluid leakage from the inlet port P to other working ports;

[0097] Specifically, when the slide valve core (14) moves to the left to connect the P port and the A port, the sealing element (10-3) and the sealing element (11-2) are in contact with the two shoulders of the slide valve core (14) respectively, forming a sealing band to prevent fluid leakage to other working ports;

[0098] Specifically, when the slide valve core (14) moves to the right to connect the P port and the B port, the sealing element (10-4) and the sealing element (11-1) are in contact with the two shoulders of the slide valve core (14) respectively, forming a sealing band to prevent fluid leakage to other working ports;

[0099] In addition, the spool valve core in the embodiment has four shoulders, if the number of the spool shoulders is changed and the working principle is met, it is considered as the embodiment.

[0100] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A detachable combined sealing groove structure for a water-based hydraulic valve, characterized in that: The water-based hydraulic valve is a three-position four-way sliding valve, comprising a valve body (8), a first valve sleeve (7-1), a second valve sleeve (7-2), a sliding valve core (14), a first sealing member (10-1), a second sealing member (10-2), a third sealing member (10-3), a fourth sealing member (10-4), a fifth sealing member (10-5), a sixth sealing member (10-6), a seventh sealing member (11-1), and an eighth sealing member (11-2); The first valve sleeve (7-1) and the second valve sleeve (7-2) are installed in the valve body (8); the joint of the first valve sleeve (7-1) and the valve body (8) cooperates to form a first detachable combined sealing groove; the joint of the second valve sleeve (7-2) and the valve body (8) cooperates to form a second detachable combined sealing groove; a valve hole that cooperates with a sliding valve core (14) is provided inside the valve body (8); the sliding valve core (14) is movably installed in the valve hole; The valve body (8) is provided with a left liquid return port T, a working port A, a liquid inlet P, a working port B, and a right liquid return port T in sequence from left to right; a first sealing member (10-1) is provided between the sliding valve core (14) and the first valve sleeve (7-1); a second sealing member (10-2) is provided between the valve body (8) and the first valve sleeve (7-1); a third sealing member (10-3) and a fourth sealing member (10-4) are both provided between the sliding valve core (14) and the valve body (8), the third sealing member (10-3) is located between the working port A and the liquid inlet P, and the fourth sealing member (10-4) is located between the working port B and the liquid inlet P; a fifth sealing member (10-5) is provided between the valve body (8) and the second valve sleeve (7-2); and a sixth sealing member (10-6) is provided between the sliding valve core (14) and the second valve sleeve (7-2); The seventh sealing member (11-1) between the working port A and the left liquid return port T is installed in a first detachable combined sealing groove formed by the valve body (8) and the first valve sleeve (7-1); An eighth sealing member (11-2) between the working port B and the right liquid return port T is installed in a second detachable combined sealing groove formed by the valve body (8) and the second valve sleeve (7-2); The valve body (8), the first valve sleeve (7-1) and the second valve sleeve (7-2) are all provided with multiple channels for communicating with the inlet and outlet liquid channels; The first valve sleeve (7-1) and the valve body (8) clamp the seventh sealing member (11-1) between the left liquid return port T and the working port A, preventing the seventh sealing member (11-1) from being hydraulically flushed out or damaged by the slide valve core (14); the second valve sleeve (7-2) and the valve body (8) clamp the eighth sealing member (11-2) between the right liquid return port T and the working port B, preventing the eighth sealing member (11-2) from being hydraulically flushed out or damaged by the slide valve core (14); The seventh sealing member (11-1) and the eighth sealing member (11-2) have the same structure, being a body of revolution structure, and the surface thereof includes an outer side surface (505), an inner side surface (506) and a side surface (507); the axial dimension (503) of the outer portion of the sealing member is greater than the axial dimension (504) of the inner portion; The inner side surfaces (506) of the seventh sealing member (11-1) and the eighth sealing member (11-2) are in the shape of an arc surface, a cone surface, a plane surface, a wave surface, or a shape having a bionic texture; And / or, the edges of the seventh sealing member (11-1) and the eighth sealing member (11-2) are of right-angle, oblique-angle or rounded-angle structures; and / or, the materials of the seventh sealing member (11-1) and the eighth sealing member (11-2) include polyurethane, rubber, and polymer materials; A tapered structure is provided between the shoulder of the slide valve core (14) and the valve stem. The tapered structure is a rounded, oblique, or right-angled structure, or any combination of rounded, oblique, and right-angled structures.

2. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 1, characterized in that: The side surfaces (507) of the seventh sealing member (11-1) and the eighth sealing member (11-2) are formed with grooves (511), tooth-shaped grooves (512, 513), arc-shaped grooves (514), wave-shaped grooves (515), and sawtooth-shaped grooves (517); Or the side surfaces (507) of the seventh sealing element (11-1) and the eighth sealing element (11-2) are provided with protruding structures (516), and the axial dimensions of the protruding structures are greater than the axial dimensions (504) of the inner portions of the sealing elements.

3. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 1, characterized in that: The valve body (8) and the sliding valve core (14) are detachable structures, and the rotation space formed between the two is the first detachable combined sealing groove and the second detachable combined sealing groove.

4. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 3, characterized in that: The seals installed in the first detachable combined sealing groove and the second detachable combined sealing groove are combined seals.

5. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 1 or 2, characterized in that: The seventh sealing member (11-1) and the eighth sealing member (11-2) are composed of a metal ring (531) and a polymer sealing member body (532); the metal ring (531) and the polymer sealing member body (532) are detachable structures or integrally formed structures.

Images