Combined reverse thrust mechanism for blind plate valve

Abstract

The utility model discloses a combined reverse thrust mechanism for a blind plate valve, which comprises an end cover, a circle of piston component groove is arranged on the inner side of the end cover, and a metal piston component is arranged in the piston component groove in a matching manner. The metal piston assembly is arranged between the blind plate and the end cover, so that when the valve releases pressure, elastic force generated by the spring set acts on the blind plate and then is transmitted to the multi-thread ring, and the multi-thread ring is loosened easily.

Description

Technical Field

[0001] The utility model relates to a combined reverse thrust mechanism for a blind plate valve. Background Art

[0002] The blind plate valve is a gate valve that is manually, electrically, pneumatically or hydraulically operated to cut off the gas medium. Its working principle is: close the blind plate, drive the multi-threaded ring forward, push the metal piston ring and the blind plate placed on the moving roller, so that the seals on the blind plate are tightly sealed with the metal valve seat and the end cover surface respectively, lock the multi-threaded ring, and the valve is pressurized; after the valve is depressurized, loosen the multi-threaded ring to drive the piston ring to separate from the blind plate.

[0003] The blind plate valve has the following defects during use: because the blind plate is tightly attached to the end cover surface when closed, there is a gap between the multi-thread ring and the valve body thread. The multi-thread is locked when the valve is under pressure. After the valve is depressurized, the thread balance is broken. The torque required to loosen the multi-thread ring is extremely large, and forced loosening can easily cause thread damage. Utility Model Content

[0004] In view of the above problems, the utility model provides a combined reverse thrust mechanism for a blind plate valve, which effectively solves the problems pointed out in the background technology.

[0005] The technical solution adopted by the utility model is:

[0006] A combined reverse thrust mechanism for a blind plate valve comprises an end cover, wherein a circle of piston assembly grooves are arranged on the inner side of the end cover, and a metal piston assembly is matched in the piston assembly groove.

[0007] Preferably, the metal piston assembly comprises a piston ring, and a spring group is fixed to one end of the piston ring facing the end cover.

[0008] Preferably, the piston assembly groove includes a spring groove and a piston groove, the spring groove matches the spring assembly, and the piston groove matches the piston ring.

[0009] The spring group comprises a plurality of springs which are evenly distributed in the spring groove in a circumferential manner.

[0010] Preferably, a wear-resistant ring is fixed to the other end of the piston ring relative to the spring assembly.

[0011] The wear-resistant ring adopts PTFE wear-resistant ring to avoid direct metal friction between the end cover and the blind plate when the valve is opened and closed.

[0012] Preferably, the piston ring has sealing members fixed on upper and lower side portions adjacent to the piston groove.

[0013] The seal can seal the piston groove to prevent external impurities from entering and causing failure of the spring group.

[0014] The utility model arranges a metal piston assembly between the blind plate and the end cover, so that when the valve releases pressure, the elastic force generated by the spring group acts on the blind plate and is further transmitted to the multi-threaded ring, so that the multi-threaded ring becomes easy to loosen.

[0015] When the valve is depressurized, the spring assembly can push the blind plate to separate from the end cover, and the end cover and the blind plate are separated from each other when the blind plate is switched. Compared with the metal friction between the original end cover and the blind plate in direct contact, the friction coefficient when the blind plate is switched is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0018] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] like Figure 1-2 As shown, a combined reverse thrust mechanism for a blind plate valve comprises an end cover 1, wherein a circle of piston assembly grooves 2 are provided on the inner side of the end cover 1, wherein the piston assembly grooves 2 are coaxial with the flow channel in the end cover 1, and a metal piston assembly 3 is matched in the piston assembly grooves 2.

[0026] The metal piston assembly 3 comprises a piston ring 31 , and a spring assembly 32 is fixed to one end of the piston ring 31 facing the end cover 1 .

[0027] The piston assembly groove 2 includes a spring groove 21 and a piston groove 22 . The spring groove 21 matches the spring assembly 32 and is used to install and fix the spring assembly 32 . The piston groove 22 matches the piston ring 31 and is used for the sliding of the piston ring 31 .

[0028] A wear-resistant ring 33 is fixed to the other end of the piston ring 31 relative to the spring assembly 32 .

[0029] The piston ring 31 has seals 34 fixed to upper and lower side portions adjacent to the piston groove 22 .

[0030] The working principle of this utility model:

[0031] Close the blind plate and drive the multi-thread ring 4 forward, thereby pushing the metal valve seat 5, the blind plate 6 and the piston ring 31 to move toward the end cover 1, so that the seals on the blind plate 6 are tightly sealed with the metal valve seat 5 and the end cover 1 respectively, and the multi-thread ring 4 is locked. At this time, the valve can be pressurized.

[0032] After the valve is depressurized, the multi-thread ring 4 is loosened, and the spring group 32 pushes the piston ring 31 under the action of elastic force, so that the blind plate 6 is separated from the end cover 1, and the elastic force is then transmitted to the multi-thread ring 4. Due to the action of the elastic force, the multi-thread ring 4 becomes easy to loosen.

[0033] The utility model designs a reverse thrust mechanism composed of a spring group 32 and a metal piston assembly 3 on the end cover 1: when the valve is under pressure, the metal piston assembly 3 is compressed by the medium force to offset the elastic force of the spring group 32; after the valve is depressurized, the elastic force of the spring group 32 can act on the blind plate 6 and be transmitted to the multi-threaded ring 4, so that the multi-threaded ring 4 becomes easy to loosen, and the reverse thrust mechanism can push the blind plate 6 to separate from the end cover 1 after the valve is depressurized, and the wear-resistant ring 33 changes the original direct metal friction between the end cover 1 and the blind plate 6, thereby reducing the friction coefficient when the blind plate 6 is switched.

[0034] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A combined reverse thrust mechanism for a blind plate valve, It is characterized in that The invention comprises an end cover (1), wherein a circle of piston assembly grooves (2) are arranged on the inner side of the end cover (1), and a metal piston assembly (3) is matched and arranged in the piston assembly groove (2).

2. A combined reverse thrust mechanism for a blind plate valve according to claim 1, It is characterized in that The metal piston assembly (3) comprises a piston ring (31), and a spring assembly (32) is fixed to one end of the piston ring (31) facing the end cover (1).

3. A combined reverse thrust mechanism for a blind plate valve according to claim 2, It is characterized in that The piston assembly groove (2) comprises a spring groove (21) and a piston groove (22), the spring groove (21) matches the spring assembly (32), and the piston groove (22) matches the piston ring (31).

4. A combined reverse thrust mechanism for a blind plate valve according to claim 3, It is characterized in that A wear-resistant ring (33) is fixed to the other end of the piston ring (31) relative to the spring assembly (32).

5. A combined reverse thrust mechanism for a blind plate valve according to claim 4, It is characterized in that The piston ring (31) is fixed with sealing members (34) on upper and lower side portions adjacent to the piston groove (22).

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