Detachable combined sealing groove structure of water-based hydraulic valve

Abstract

The invention relates to a detachable combined type sealing groove structure of a water-based hydraulic valve. The detachable combined type sealing groove structure comprises a valve sleeve (1), a valve body (2), a valve element (3) and a sealing piece (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 type sealing groove (6), the sealing piece (5) is installed in the detachable combined type sealing groove (6), and the valve element (3) is installed in a valve hole (201) of the valve body (2) and a valve hole (201) of the valve sleeve (1). According to the detachable combined sealing groove structure, the sealing piece can be clamped or clamped in the sealing groove, and the sealing piece is prevented from being impacted by high-pressure liquid to deform or being rushed out of the sealing groove by the high-pressure liquid.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and 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 Art

[0002] The traditional sliding valve type reversing valve uses gap sealing, which results in a large leakage when water is used as the hydraulic transmission medium. To avoid leakage of water medium in the sliding valve, a seal is installed between each inlet / outlet in the sliding valve cavity. The seal can contact with the convex shoulder of the valve core to form a sealing belt to prevent leakage of water medium between each inlet / outlet. However, due to the large impact of high-pressure liquid at the moment of opening the water-based sliding valve, the seal will be flushed out of the sealing groove, causing the seal to fail or the valve core to get stuck, which will lead to failure of the reversing valve.

[0003] Patent "A Sliding Valve Type Hydraulic Directional Valve with a Special Sealing Valve Core Structure" CN112762042A discloses a directional valve with a sliding valve structure suitable for high-pressure, water-based media environments, one of whose structures is a three-position four-way structure. The sliding valve type directional valve of this structure has seals installed between each adjacent inlet / outlet in the valve chamber. When the sliding valve is opened or closed, the instantaneous impact of the fluid is large. Due to the insufficient rigidity of the seal, it will be deformed under the impact of the high-pressure fluid, and even be flushed out of the sealing groove, thereby affecting the performance and life of the reversing valve. At the same time, the edge of the valve core shoulder will generate a shear force on the seal when passing through the seal, bringing the seal out of the groove, or causing an extrusion effect on the seal, causing the seal to fail.

[0004] Therefore, there is an urgent need to invent a reliable sealing structure to avoid the problem that the sealing element of the water-based reversing valve is easily damaged. Summary of the invention

[0005] To solve the above problems, the present invention 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 used in other medium environments such as pure water, seawater, and emulsion.

[0006] The technical solution of the present invention is as follows:

[0007] A detachable combined sealing groove structure of a water-based hydraulic valve comprises a valve sleeve, a valve body, a valve core and a sealing member. The valve sleeve is installed in the valve body, a detachable combined sealing groove is formed at the joint of the valve sleeve and the valve body, the sealing member 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 hole are staggered to form an opening and the valve core shoulder or the valve core cone surface is not in contact with the seal, the fluid medium through the liquid hole flows to the valve hole. At this time, 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 contacts the seal, forming a sealing belt to prevent the fluid medium in the liquid hole on the right side of the seal from flowing to the valve hole on the left side of the seal. At this time, the valve port is closed (as shown Figure 4 shown).

[0009] Specifically, the outer portion of the seal is an axially protruding portion close to the outer side of the seal, the inner portion of the seal is a portion close to the inner side of the seal, and the axial dimension of the outer portion of the seal is greater than the axial dimension of the inner portion of the seal.

[0010] Specifically, the side of the seal can be set as a groove, a tooth-shaped groove, an arc groove, a wave groove, a sawtooth groove, etc., or the side of the seal is provided with a protruding structure and the axial dimension of the protruding part is larger than the axial dimension of the inner part of the seal, so that the valve sleeve and the valve body can squeeze and clamp the seal to prevent the valve core shoulder from bringing the seal out when passing through the seal, or prevent the seal from being washed out of the sealing groove by the fluid medium. The inner side of the seal contacts the valve core shoulder to form a dynamic sealing surface, and the outer side of the seal and the side of the seal contact the wall of the sealing groove to form a static sealing surface to prevent fluid leakage.

[0011] Specifically, the side surface of the seal is stepped, and the axial dimension of the stepped portion close to the outer side surface of the seal is greater than the axial dimension of the stepped portion close to the inner side surface of the seal.

[0012] Specifically, the sealing groove where the sealing element is located is of a detachable assembled type, the sealing groove is composed of a valve body and a valve sleeve, or is composed of two adjacent valve sleeves, and 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, and the cross-sectional shape of the detachable combined sealing groove is the same as or similar to the cross-sectional shape of the sealing member, so that the sealing member can be clamped in the detachable combined sealing groove.

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

[0015] No matter what kind of special-shaped seal is provided, its main purpose is to clamp the seal through the detachable combined sealing groove.

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

[0017] Specifically, the inner side surface of the seal can be in the shape of an arc, a cone, a plane, a wave, or a shape with a bionic texture. The edges of the seal can be in the shape of a right angle, an oblique angle, a rounded angle, etc., to prevent the seal from being damaged during assembly or operation. The seal material includes but is not limited to polyurethane, rubber, polymer materials, etc.

[0018] Specifically, the seal installed in the detachable combined sealing groove may be a combination of multiple seals (including but not limited to a combination of 521 and 522).

[0019] Specifically, a metal ring is installed in the polymer seal, and the metal ring and the polymer seal body are detachable or integrated, the purpose of which is to tighten the seal to prevent the seal from deforming, thereby preventing the seal from being hydraulically flushed out of the sealing groove or being damaged by the moving valve core.

[0020] Specifically, a conical structure is provided between the boss of the valve core and the valve stem. The conical structure may be a rounded, beveled, or right-angled structure, or any combination of rounded, beveled, or right-angled structures. The purpose is to reduce the shearing effect of the boss of the valve core on the seal when it passes through the seal.

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

[0022] The technical effects brought about by the technical solution of the present invention are as follows:

[0023] There is no sealing ring in the valve cavity of the ordinary oil-based sliding valve type reversing valve, while there is a sealing member in the valve cavity of the water-based sliding valve. During the reversing process of the valve core, the sealing member is easily flushed out of the sealing groove under the impact of high-pressure liquid, causing the water-based sliding valve to fail. The sealing structure of the present invention can clamp or clamp the sealing member between the valve body and the valve sleeve to prevent the sealing member from being deformed by the impact of high-pressure liquid or being flushed out of the sealing groove by high-pressure liquid.

[0024] Since the edge of the convex shoulder of the sliding valve core will pass through the seal during the reversing process of the valve core of the sliding valve type reversing valve, ordinary O-rings, drum rings, rectangular rings and other sealing rings will be brought out of the groove by the convex shoulder of the valve core or washed out of the groove by the fluid medium when being squeezed by the valve core or impacted by the fluid medium. Therefore, the axial dimension of the outer part of the seal of the present invention is greater than the axial dimension of the inner part of the seal, or the side of the seal is provided with grooves, tooth-shaped grooves, wavy grooves and other special-shaped grooves, so as to clamp the seal in the detachable combined sealing groove formed by the valve sleeve and the valve body, so as to prevent the sealing ring from being washed out of the sealing groove by the high-pressure liquid or being squeezed out of the sealing groove by the valve core, thereby ensuring the reliability of the sealing of the water-based hydraulic valve.

[0025] The present invention can be applied to a two-position two-way slide valve structure, a two-position three-way slide valve structure, a three-position four-way slide valve structure, etc., and can expand the application scope of the water-based hydraulic valve. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0031] Figure 6 is a schematic diagram of a seal cross section;

[0032] Figure 7 It is a partial schematic diagram of the valve core of a water-based hydraulic valve;

[0033] Figure 8 Schematic diagram of the cross section of seals with different structures;

[0034] Fig. 9 It is a schematic diagram of the installation of the combined seal in the removable combined seal groove;

[0035] Fig.10 It is a cross-sectional schematic diagram of a polymer seal with a metal structure inside;

[0036] Fig.11 It is a schematic diagram of an embodiment of a water-based hydraulic slide valve type reversing valve of the present invention with a detachable combined sealing groove composed of a valve body and a valve sleeve;

[0037] Fig.12 It is a schematic diagram of an embodiment of a water-based hydraulic slide valve type reversing valve of the present invention having a detachable combined sealing groove composed of a plurality of valve sleeves;

[0038] Fig.13 The present invention is a schematic diagram of an embodiment of a water-based hydraulic sliding valve type reversing valve with a detachable combined sealing groove composed of a valve body and a valve sleeve.

[0039] In the figure:

[0040] 1 valve sleeve;

[0041] 2 valve bodies, 201 valve holes;

[0042] 3 valve core, 301 valve core shoulder, 302 valve core cone, 303 valve stem;

[0043] 4 liquid holes;

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

[0045] 6 removable combined sealing groove, 601 removable 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 Sliding valve core;

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

[0050] 11-1 Seals for removable combined sealing grooves, 11-2 Seals for removable combined sealing grooves;

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

[0052] 13 valve sleeve;

[0053] 14 Sliding valve core;

[0054] P: liquid inlet P;

[0055] A: working port A;

[0056] B: working port B;

[0057] T: Liquid return port T. DETAILED DESCRIPTION

[0058] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to 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. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0060] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] The present invention 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 used in other medium environments such as pure water, seawater, emulsion, etc. The technical solution of the present invention is as follows:

[0063] A detachable combined sealing groove structure of 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 installed 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 installed in the detachable combined sealing groove (6), and the valve core (3) is installed in the 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 conical surface (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 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 in the right side of the seal through the liquid hole (4) from flowing to the valve hole (201) on the left side of the seal. At this time, the valve port is in a closed state (as shown in FIG. 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 greater 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 bringing 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) of the seal and the side surface (507) of the seal contact the sealing groove wall surface (601) to form a static sealing surface.

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

[0068] Specifically, the detachable combined sealing groove (6) where the sealing element (5) is located is of a combined type. The detachable combined sealing groove (6) is composed of a valve body (2) and a valve sleeve (1), or is composed of two adjacent valve sleeves (1). The valve sleeve (1) or the valve body (2) is detachable.

[0069] Specifically, the cross-sectional shape of the detachable combined sealing groove (6) for clamping the sealing member formed by the cooperation between the valve sleeve (1) and the valve body (2) is the same as or similar to the cross-sectional shape of the sealing member, so that the sealing member (5) can be clamped 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), the inner side surface (506) and the side surface (507) of the sealing member, so as to clamp the sealing member (5) in the detachable assembled sealing groove (6).

[0071] Regardless of the special-shaped structure of the 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 cooperate to form a detachable combined sealing groove (6) for installing or clamping the sealing element (5).

[0073] Specifically, the inner side surface (506) of the seal can be in the shape of an arc, a cone, a plane, a wave, or a shape with a bionic texture. The edges of the seal can be in the shape of a right angle, an oblique angle, a rounded angle, etc., which is convenient for assembly of the seal and reduces possible scratches, folds, and other damages to the seal ring during assembly. The seal material includes but is not limited to polyurethane, rubber, polymer materials, etc.

[0074] Specifically, the seal installed in the detachable combined sealing groove (6) can be a combination of multiple seals (including but not limited to the forms of 521 and 522).

[0075] Specifically, a metal ring (531) is installed in the polymer seal. The metal ring (531) and the polymer seal body (532) are detachable or integrated. The purpose is to tighten the seal to prevent the seal from deforming, thereby preventing the seal from being hydraulically flushed out of the sealing groove or being carried out of the sealing groove by the moving valve core.

[0076] Specifically, a conical structure (302) is provided between the boss (301) of the valve core and the valve stem (303), which may be a rounded, beveled, or right-angled structure, or any combination of rounded, beveled, or right-angled structures, etc., with the purpose of reducing the shearing effect of the boss (301) of the valve core on the seal (5) when passing through the seal (5), thereby preventing damage to the sealing ring.

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

[0078] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0079] Embodiment 1

[0080] See also Fig.11 , a schematic diagram 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. Specifically, the water-based hydraulic valve is a three-position four-way slide valve, comprising a water-based hydraulic slide valve body (8), a valve sleeve (7-1, 7-2), a slide valve core (9), and sealing members (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 11-1, 11-2); a valve hole matched with the slide valve core is arranged inside the valve body, a sealing member (11-1) between the working port A and the left liquid return port T is installed in a detachable combined sealing groove formed by the valve body (8) and the valve sleeve (7-1), a sealing member (11-2) between the working port B and the right liquid return port T is installed in a detachable combined sealing groove formed by the valve body (8) and the valve sleeve (7-2), and the valve body and the valve sleeve are both provided with multi-channels for communicating with the inlet and outlet liquid channels. The valve sleeve (7-1 / 7-2) and the valve body (8) clamp the sealing member (11-1 / 11-2) between the liquid return port T and the working port A or the working port B to prevent the sealing member between the working port and the liquid return port from being flushed out by hydraulic pressure or being damaged by the valve core.

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

[0082] Specifically, when the spool (9) of the sliding valve is in the middle position, the sealing member (10-3) and the sealing member (10-4) contact the convex shoulder of the spool (9) to form a sealing band, thereby preventing the fluid at the liquid inlet P from leaking to other working ports;

[0083] Specifically, when the spool valve (9) moves to the left until the P port and the B port are connected, the sealing member (10-3) and the sealing member (11-2) respectively contact the two convex shoulders of the spool valve (9) to form a sealing belt to prevent the fluid from leaking to other working ports;

[0084] Specifically, when the spool valve (9) moves rightward until the P port and the A port are in communication, the sealing element (10-4) and the sealing element (11-1) respectively contact the two convex shoulders of the spool valve (9) to form a sealing belt, thereby preventing the fluid from leaking to other working ports;

[0085] In addition, the sliding valve core in this embodiment has three shoulders. If the number of the shoulders of the valve core is changed and the above working principle is satisfied, it is regarded as this embodiment.

[0086] Embodiment 2

[0087] See also Fig.12 , a schematic diagram of a water-based hydraulic slide valve type reversing valve with a detachable combined sealing groove 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, including a water-based hydraulic slide valve body (8), a valve sleeve (7-1, 7-2, 12-1, 12-2, 13), a slide valve core (9), and a sealing member (10-1, 10-2, 10-5, 10-6, 10-7, 10-8, 10-9, 10-10, 11-1, 11-2, 11-3, 11-4); a valve hole matching with the slide valve core is arranged inside the valve body, a plurality of valve sleeves are installed inside the valve body, and a detachable combined sealing groove can be matched between the valve sleeves and the valve sleeves for installing the sealing member. The invention is characterized in that: the valve sleeve (7-1 / 7-2) and the valve sleeve (12-1 / 12-2) clamp the sealing member (11-1 / 11-2) between the return liquid port T and the working port A / B to prevent the sealing member between the working port A / B and the return liquid port T from being hydraulically flushed out or damaged by the valve core; the valve sleeve (12-1 / 12-2) and the valve sleeve (13) clamp the sealing member (11-3 / 11-4) between the working port A / B and the liquid inlet P to prevent the sealing member between the working port A / B and the liquid inlet P from being hydraulically flushed out or damaged by the valve core. At the same time, a sealing member is installed on the outside of each valve sleeve to prevent fluid leakage between adjacent liquid inlet and outlet ports.

[0088] A water-based hydraulic slide valve type reversing valve with a detachable combined sealing groove composed of a valve body and multiple valve sleeves. The working principle is:

[0089] Specifically, when the slide valve core (9) is in the middle position, the sealing member (11-3) and the sealing member (11-4) contact the convex shoulder of the slide valve core (9) to form a sealing belt, thereby preventing the fluid of the liquid inlet P from leaking to other working ports;

[0090] Specifically, when the slide valve core (9) moves to the left until the P port and the B port are connected, the sealing element (11-3) and the sealing element (11-2) respectively contact the two convex shoulders of the slide valve core (9) to form a sealing belt to prevent the fluid from leaking to other working ports;

[0091] Specifically, when the slide valve core (9) moves rightward until the P port and the A port are connected, the sealing element (11-4) and the sealing element (11-1) respectively contact the two convex shoulders of the slide valve core (9) to form a sealing belt to prevent the fluid from leaking to other working ports;

[0092] In this embodiment, the spool of the sliding valve has three convex shoulders. If the number of convex shoulders of the valve core is changed and the above working principle is satisfied, it is regarded as this embodiment.

[0093] Embodiment 3

[0094] See also Fig.13 , a schematic diagram 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. Specifically, the water-based hydraulic valve is a three-position four-way slide valve, comprising a water-based hydraulic slide valve body (8), a valve sleeve (7-1, 7-2), a slide valve core (14), and sealing members (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 11-1, 11-2); a valve hole matched with the slide valve core is arranged inside the valve body, a sealing member (11-1) between a working port A and a left liquid return port T is installed in a detachable combined sealing groove formed by the valve body (8) and the valve sleeve (7-1), a sealing member (11-2) between a working port B and a right liquid return port T is installed in a detachable combined sealing groove formed by the valve body (8) and the valve sleeve (7-2), and the valve body and the valve sleeve are both provided with multi-channels for communicating with the inlet and outlet liquid channels. The invention is characterized in that the valve sleeve (7-1 / 7-2) and the valve body (8) clamp the sealing member (11-1 / 11-2) between the liquid return port T and the working port A or the working port B to prevent the sealing member between the working port and the liquid return port from being flushed out by hydraulic pressure or being damaged by the valve core.

[0095] Its working principle is:

[0096] Specifically, when the slide valve core (14) is in the middle position, the seal (10-3) and the seal (10-4) contact the convex shoulder of the slide valve core (9) to form a sealing belt, thereby preventing the fluid in the liquid inlet P from leaking to other working ports;

[0097] Specifically, when the slide valve core (14) moves to the left until the P port and the A port are connected, the sealing element (10-3) and the sealing element (11-2) respectively contact the two convex shoulders of the slide valve core (14) to form a sealing belt to prevent the fluid from leaking to other working ports;

[0098] Specifically, when the slide valve core (14) moves rightward until the P port and the B port are connected, the sealing element (10-4) and the sealing element (11-1) respectively contact the two convex shoulders of the slide valve core (14) to form a sealing belt to prevent the fluid from leaking to other working ports;

[0099] In addition, the sliding valve core in this embodiment has four convex shoulders. If the number of convex shoulders of the valve core is changed and the above working principle is satisfied, it is regarded as this embodiment.

[0100] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A detachable assembled sealing groove structure of a water-based hydraulic valve, comprising 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); and the characteristics are: The joint between the valve sleeve (1) and the valve body (2) cooperates to form a detachable combined sealing groove (6), the sealing member (5) is installed in the detachable combined sealing groove (6), and the valve core (3) is movably installed in the valve holes (201) of the valve body (2) and the valve sleeve (1).

2. The detachable combined sealing groove structure of the water-based hydraulic valve according to claim 1 is characterized in that: The seal (5) is a rotating body structure; the surface of the seal (5) includes an outer side surface (505) of the seal, an inner side surface (506) of the seal, and a side surface (507) of the seal; the axial dimension (503) of the outer side portion of the seal is greater than the axial dimension (504) of the inner side portion of the seal.

3. The detachable assembled sealing groove structure of the water-based hydraulic valve according to claim 1 is characterized in that: The side surface (507) of the sealing member is formed with a groove (511), tooth-shaped grooves (512, 513), an arc-shaped groove (514), a wave-shaped groove (515), and a sawtooth-shaped groove (517); Or the side surface (507) of the sealing element is provided with a protruding structure (516), and the axial dimension of the protruding structure is greater than the axial dimension (504) of the inner side surface of the sealing element.

4. The detachable assembled sealing groove structure of the water-based hydraulic valve according to claim 1, characterized in that: The valve sleeve (1) or the valve body (2) is a detachable structure, and the rotation space formed between the two is the detachable combined sealing groove (6).

5. The detachable assembled sealing groove structure of the water-based hydraulic valve according to claim 1 and claim 4, characterized in that: The cross-sectional shape of the detachable combined sealing groove (6) formed by the cooperation between the valve sleeve (1) and the valve body (2) is the same as or similar to the cross-sectional shape of the sealing member (5), so that the sealing member (5) can be clamped in the detachable combined sealing groove (6).

6. The detachable combined sealing groove structure of the water-based hydraulic valve according to claim 1 and claim 4, characterized in that: A plurality of the valve sleeves (1) can be installed in the valve body (2), and two adjacent valve sleeves (1) can cooperate to form the detachable combined sealing groove (6).

7. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 2, characterized in that: The inner side surface (506) of the sealing member may be in the shape of a curved surface, a conical surface, a flat surface, a wavy surface, or a shape having a bionic texture; And / or, the edges of the seal may be of right angle, beveled angle or rounded angle structure; And / or, the material of the sealing member includes but is not limited to polyurethane, rubber, and polymer materials.

8. The detachable assembled sealing groove structure of the water-based hydraulic valve according to claims 1, 4, 5 and 6, characterized in that: The sealing component installed in the detachable combined sealing groove (6) may be a combined sealing component.

9. The detachable assembled sealing groove structure of the water-based hydraulic valve according to claims 1, 2, 3, 5 and 7, characterized in that: The sealing member may be composed of a metal ring (531) and a polymer sealing member body (532), and the metal ring (531) and the polymer sealing member body (532) are detachable structures or integrally formed structures.

10. The detachable assembled sealing groove structure of a water-based hydraulic valve according to claim 1, characterized in that: A conical structure (302) is provided between the boss (301) of the valve core (3) and the valve stem (303). The conical structure (302) can be a rounded, oblique, or right-angle structure, or any combination of rounded, oblique, and right-angle structures.

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