Buckle type quick-release high-performance double-gate-disc gate valve

Abstract

The utility model discloses a buckle type quick-release high-performance double-gate-plate gate valve which comprises a valve body, a valve seat, a double-gate-plate structure and a valve rod, the double-gate-plate structure comprises a left gate plate and a right gate plate, an annular groove is formed in the right side of the left gate plate, and a pair of inner bosses are arranged on the upper side and the lower side of an opening in the right side of the annular groove; an annular table protruding leftwards is fixed to the left side of the right gate plate, an outer boss is fixed to the left side of the annular table, the left gate plate and the right gate plate are fixed through a flat key positioning structure at the top, the left side of the left gate plate is an inclined face with the upper portion protruding leftwards, and the right side of the right gate plate is an inclined face with the upper portion protruding rightwards. Through innovative designs such as buckle type gate plate matching, a flat key quick-release structure, a stellite sealing surface and a micro-movement pressure relief mechanism, the problems that a traditional double-gate-plate gate valve is poor in sealing performance, complex to maintain, high in cost and the like are comprehensively solved, and the technical effects of high sealing performance, quick disassembly and assembly, low cost and long service life are achieved; and the method is suitable for high-requirement industrial pipeline systems.

Description

Technical Field

[0001] This utility model relates to a snap-on quick-release type high-performance double gate valve. Background Technology

[0002] In the existing technology and a wide range of products, ordinary double-gate valves have many shortcomings in maintenance, repair, and processing:

[0003] Ordinary double gate valves have an overly complex structure, high processing costs, and cumbersome disassembly and assembly processes during maintenance. They require a lot of specialized equipment and tools, making it impossible to perform quick inspections and repairs without affecting the normal operation of the pipeline system. The long maintenance process results in wasted time and economic losses. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a snap-on quick-release high-performance double gate valve. By optimizing the sealing surface material, improving the gate mating method, and the quick-release structure, it achieves high sealing performance, easy maintenance, and low-cost processing, effectively solving the problems pointed out in the background art.

[0005] The technical solution adopted in this utility model is:

[0006] A snap-fit, quick-release high-performance double-gate valve includes a valve body, a valve seat, a double-gate structure matching the valve seat, and a valve stem for driving the double-gate structure to move up and down. The double-gate structure includes a left gate and a right gate. An annular groove is formed on the right side of the left gate. A pair of inner bosses protruding towards the center are provided on the upper and lower sides of the opening on the right side of the annular groove. The two inner bosses are symmetrically arranged. An annular platform protruding to the left is fixed on the left side of the right gate. A pair of outer bosses protruding outward are fixed radially on the upper and lower sides of the left side of the annular platform. The outer bosses are clearance-fitted with the annular groove. The left and right gates are fixed by a flat key positioning structure at the top. The left side of the left gate has an upper left-protruding inclined surface, and the right side of the right gate has an upper right-protruding inclined surface.

[0007] Preferably, the flat key positioning structure includes keyways formed on the top of the left and right gate plates, and a flat key matched and set in the keyways. A screw hole is formed on the top of the left or right gate plate, and a screw is matched and set in the screw hole. A through hole is formed on the flat key at the position corresponding to the screw hole, and the screw passes through the through hole on the flat key and is screwed into the screw hole.

[0008] Preferably, the two inner bosses are symmetrically positioned at 92-95 degrees within the annular groove.

[0009] Preferably, the two external protrusions are symmetrically positioned at 85-87° on the annular platform.

[0010] Preferably, the sealing surfaces of the valve seat, the left gate and the right gate, as well as the contact surface between the left gate and the right gate, are all made of Stellite cemented carbide.

[0011] Preferably, the top of the double gate structure is provided with a positioning mechanism that is longitudinally fixed to the valve stem and circumferentially rotates.

[0012] The innovative points of this utility model are as follows:

[0013] The snap-fit ​​gate structure has an annular groove and symmetrical inner bosses (92°~95°) on the right side of the left gate and an annular platform and symmetrical outer bosses (85°~87°) on the left side of the right gate. The left and right gates can move slightly through clearance fit. When the valve is opened, the displacement can quickly release pressure and reduce the opening torque.

[0014] Keyless quick-release positioning structure: The top of the left and right gate plates is provided with keyways and keyless buttons, and the keyless buttons are fixed by screws; during disassembly, the gate plates can be separated simply by loosening the screws and removing the keyless buttons, which simplifies the complex bolt connection method of traditional gate valves, realizes quick disassembly and assembly, and significantly shortens maintenance time;

[0015] Stellite hard alloy sealing surfaces: The valve seat, gate sealing surfaces, and contact surfaces are all made of Stellite hard alloy through welding, and are treated with precision machining and grinding processes to replace ordinary metals or coating materials. This improves the friction resistance, corrosion resistance, and high temperature resistance of the sealing surfaces, extending the service life of the valve. In addition, a Stellite hard alloy sealing surface is also provided between the left and right gates, which adds a sealing surface compared to conventional double gates, thus improving the sealing effect.

[0016] This utility model comprehensively solves the problems of poor sealing performance, complex maintenance, and high cost of traditional double gate valves through innovative designs such as snap-fit ​​gate valve, flat key quick-release structure, Stellite alloy sealing surface, and micro-movement pressure relief mechanism. It achieves the technical effects of high sealing performance, quick disassembly and assembly, low cost and long service life, and is suitable for high-requirement industrial pipeline systems. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the right side structure of the left gate.

[0019] Figure 3 This is a cross-sectional view of the left gate.

[0020] Figure 4 This is a schematic diagram of the left side structure of the right gate.

[0021] Figure 5 This is a cross-sectional view of the right gate.

[0022] Figure 6 This is a schematic diagram of a double-gate structure;

[0023] Figure 7 This is a cross-sectional view of the double gate structure. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0031] like Figure 1-7 As shown, a snap-on quick-release high-performance double gate valve includes a valve body 1, a valve seat 2, a double gate structure 3 that matches the valve seat 2, and a valve stem 4 that drives the double gate structure 3 to move up and down. The double gate structure 3 includes a left gate 31 and a right gate 32. An annular groove 33 is opened on the right side of the left gate 31. A pair of inner bosses 34 protruding towards the center are provided on the upper and lower sides of the opening on the right side of the annular groove 33. The two inner bosses 34 are symmetrically arranged. An annular platform 35 protruding to the left is fixed on the left side of the right gate 32. A pair of outer bosses 36 protruding outward are fixed on the upper and lower sides of the left side of the annular platform 35. The outer bosses 36 are clearance-fitted with the annular groove 33. The left gate 31 and the right gate 32 are fixed by a flat key positioning structure 5 at the top. The left side of the left gate 31 has an upper leftward convex inclined surface, and the right side of the right gate 32 has an upper rightward convex inclined surface.

[0032] The flat key positioning structure 5 includes a keyway 51 formed on the top of the left gate plate 31 and the right gate plate 32, and a flat key 52 matched and set in the keyway 51. A screw hole 53 is formed on the top of the left gate plate 31 or the right gate plate 32, and a screw 54 is matched in the screw hole 53. A through hole is formed on the flat key 52 at the position corresponding to the screw hole 53. The screw 54 passes through the through hole on the flat key 52 and is screwed into the screw hole 53.

[0033] The two inner bosses 34 are symmetrically positioned at 92-95 degrees within the annular groove 33.

[0034] The two external protrusions 36 are symmetrical at 85-87° on the annular platform 35.

[0035] The sealing surfaces of the valve seat 2, the left gate 31 and the right gate 32, as well as the contact surface between the left gate 31 and the right gate 32, are all made of Stellite hard alloy.

[0036] The top of the double gate structure 3 is provided with a positioning mechanism 6 that is longitudinally fixed to the valve stem 4 and rotates circumferentially.

[0037] This utility model valve achieves quick assembly and disassembly of the gate through a snap-fit ​​structure, and significantly improves sealing performance and maintenance efficiency by combining a flat key positioning and a hard alloy sealing surface.

[0038] The working principle is as follows:

[0039] When the valve is closed, the sealing surface of the double gate structure 3 and the sealing surface of the valve seat 2 will have better contact, enhancing the valve's sealing performance. When the valve is opened, at the moment the double gate structure 3 opens, the gate on the high-pressure side will lift up first due to the upward thrust of the high-pressure medium on the inclined surface, while the gate on the low-pressure side remains closed to the valve seat. A slight displacement will occur between the left gate 31 and the right gate 32 in the longitudinal direction. At this time, the high-pressure medium will pass through the sealing surface between the gate and the valve seat 2 and enter the intermediate cavity. The high-pressure medium entering the intermediate cavity will directly exert an upward thrust on the double gate structure 3, thereby realizing the rapid pressure relief of the medium on the high-pressure side of the valve and effectively reducing the torque required to open the valve.

[0040] Assembly and disassembly of the dual-gate structure:

[0041] First, rotate the left gate 31 or the right gate 32 by 90 degrees so that the left gate 31 or the right gate 32 rotate 90 degrees relative to each other. Then push the right gate 32 to the left and rotate the right gate 32 so that the top surfaces of the left gate 31 and the right gate 32 coincide. Next, place the flat key 52 into the keyway 51 and align the through hole on the flat key 52 with the screw hole 53 on the left gate 31 or the right gate 32. Finally, screw the screw 54 through the through hole and screw it into the screw hole 53. This completes the assembly of the double gate structure. When disassembling, simply reverse the above operations.

[0042] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A snap-fit, quick-release type high-performance double-gate valve, characterized in that, The valve includes a valve body (1), a valve seat (2), a double gate structure (3) matching the valve seat (2), and a valve stem (4) for driving the double gate structure (3) to move up and down. The double gate structure (3) includes a left gate (31) and a right gate (32). An annular groove (33) is opened on the right side of the left gate (31). A pair of inner bosses (34) protruding towards the center are provided on the upper and lower sides of the opening on the right side of the annular groove (33). The two inner bosses (34) are symmetrically arranged. A left-protruding annular platform (35) is fixed on the left side of the gate (32). A pair of outwardly protruding outer bosses (36) are fixed on the upper and lower sides of the left side of the annular platform (35) along the radial direction. The outer bosses (36) are in clearance fit with the annular groove (33). The left gate (31) and the right gate (32) are fixed by the top flat key positioning structure (5). The left side of the left gate (31) has an upper left-protruding inclined surface, and the right side of the right gate (32) has an upper right-protruding inclined surface.

2. The snap-on quick-release high-performance double gate valve according to claim 1, characterized in that, The flat key positioning structure (5) includes a keyway (51) opened on the top of the left gate plate (31) and the right gate plate (32), and a flat key (52) matched in the keyway (51). The top of the left gate plate (31) or the right gate plate (32) is provided with a screw hole (53), and a screw (54) is matched in the screw hole (53). The flat key (52) is provided with a through hole at the position corresponding to the screw hole (53). The screw (54) passes through the through hole on the flat key (52) and is screwed into the screw hole (53).

3. The snap-on quick-release high-performance double gate valve according to claim 1, characterized in that, The two inner bosses (34) are symmetrically positioned at 92-95 degrees within the annular groove (33).

4. The snap-fit ​​quick-release high-performance double gate valve according to claim 3, characterized in that, The two external protrusions (36) are symmetrical at 85-87° on the annular platform (35).

5. A snap-fit ​​quick-release high-performance double gate valve according to claim 1, characterized in that, The sealing surfaces of the valve seat (2), the left gate (31) and the right gate (32), as well as the contact surfaces between the left gate (31) and the right gate (32), are all made of Stellite hard alloy.

6. A snap-fit ​​quick-release high-performance double gate valve according to claim 1, characterized in that, The top of the double gate structure (3) is provided with a positioning mechanism (6) that is longitudinally fixed to the valve stem (4) and rotates circumferentially.

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