Valve clack embedded with nut and gate valve

Abstract

The utility model belongs to the field of gate valves, and particularly discloses a nut-embedded valve clack and a gate valve, the nut-embedded valve clack comprises a valve clack framework, a transmission nut and a rubber coating layer, a mounting groove is formed in the valve clack framework, the transmission nut is embedded, mounted and positioned in the mounting groove, and the rubber coating layer covers the valve clack framework and the transmission nut. The integrated structure is formed by the valve clack framework, the transmission nut and the rubber coating layer, so that the transmission nut is not prone to falling off, and the transmission nut cannot damage the rubber coating layer under the torsion of rotation of the valve rod.

Description

Technical Field

[0001] The present application belongs to the field of gate valves, and more specifically, relates to a nut-embedded valve disc and a gate valve. Background Art

[0002] The gate valve is installed on the fluid pipeline to realize flow interception and flow regulation. The gate valve is a valve with a rubber-coated valve disc as the opening and closing part. The opening and closing of the valve is achieved by controlling the movement of the rubber-coated valve disc.

[0003] In the related art, a gate valve includes a valve body, a valve stem, a valve disc, and a transmission nut. A flow channel is provided in the valve body, wherein the transmission nut is mounted on the valve disc, which is located inside the valve body. The valve stem is rotatably connected to the valve body. The valve stem passes through the transmission nut and is threadedly connected to the transmission nut. When the valve stem rotates, the transmission nut and valve disc move, thereby cutting off and opening the flow channel. Currently, the exterior of the valve disc is usually coated with a rubber layer, and the transmission nut and valve disc are separated structures, which are connected by T-shaped lugs to achieve transmission. However, under the torque of the valve stem rotation, the transmission nut can easily cut and damage the rubber layer of the valve disc. In addition, the transmission nut is relatively loosely installed and easily falls off. Utility Model Content

[0004] In response to the defects of the existing technology, the present application provides a nut-embedded valve disc and a gate valve, aiming to solve the problem that the transmission nut on the existing gate valve disc is easy to fall off and the rubber layer of the valve disc is easily damaged under the action of torque.

[0005] The present application provides a nut-embedded valve flap, which specifically includes a valve flap frame, a transmission nut and a rubber layer. The valve flap frame is provided with an installation groove, the transmission nut is embedded and positioned in the installation groove, and the rubber layer covers the outside of the valve flap frame and the transmission nut.

[0006] The above technical solution conceived by the present application, compared with the prior art, since the transmission nut is installed in the installation groove and the rubber layer is covered on the outside of the valve disc frame and the transmission nut, the valve disc frame, the transmission nut and the rubber layer form an integrated structure, which can achieve the beneficial effect of preventing the transmission nut from falling off and not cutting and damaging the rubber layer under the torque of the valve stem when the gate valve is in use.

[0007] As a further preferred embodiment, a through-hole communicating with the mounting groove is provided on the valve flap skeleton, and the through-hole is connected to the central hole of the transmission nut and can be used for the valve stem to pass through.

[0008] By adopting the above technical solution, the valve stem passes through the center hole of the transmission nut and enters the through hole on the valve disc frame, so that the transmission nut is more stable on the valve stem and prevents the transmission nut from falling off after the valve disc drops to the lowest position.

[0009] As a further preferred embodiment, a boss is fixedly connected to the outer wall of the transmission nut, and one end of the transmission nut is inserted into the through hole.

[0010] By adopting the above technical solution, one end of the transmission nut is inserted into the through hole to improve the installation stability, and the boss limits the transmission nut to prevent the transmission nut from falling into the through hole.

[0011] As a further preferred embodiment, the mounting groove includes a T-shaped opening groove, the opening direction of the T-shaped opening groove is perpendicular to the axis of the center hole of the transmission nut, and the transmission nut is rotated with the axis of the center hole of the transmission nut as the rotation axis, so that the boss can enter the T-shaped opening groove.

[0012] As a further preferred embodiment, the mounting groove further includes a positioning groove provided at the bottom of the T-shaped opening groove for the boss to be embedded in, and the positioning groove is consistent with the boss in shape and size.

[0013] By adopting the above technical solution, after the boss enters the positioning groove, the transmission nut is in direct contact with the valve disc frame. The transmission nut directly interacts with the valve disc frame under the action of torque, and the transmission nut is positioned and cannot rotate, thereby avoiding damage to the rubber layer.

[0014] As a further preference, the arrangement direction of the positioning grooves is perpendicular to the arrangement direction of the through holes.

[0015] By adopting the above technical solution, after the transmission nut is rotated, the boss is located above the positioning groove, so that the transmission nut moves into the through hole again. At this time, the boss enters the positioning groove, thereby fixing the position of the transmission nut.

[0016] As a further preferred embodiment, the rubber coating fills the gap between the boss and the inner wall of the T-shaped opening groove.

[0017] By adopting the above technical solution, the rubber coating is filled between the boss and the inner wall of the T-shaped opening groove, and the rubber coating presses the boss to prevent it from falling off from the positioning groove.

[0018] As a further preference, the encapsulation layer also covers the inner wall of the perforation.

[0019] By adopting the above technical solution, the rubber layer protects the inner wall of the perforation, avoiding damage caused by contact between the valve stem and the valve disc frame.

[0020] As a further preferred embodiment, a limiting protrusion is fixedly connected to the valve flap skeleton, a limiting groove is provided on the limiting protrusion, and the opening direction of the limiting groove is the same as the opening direction of the through hole.

[0021] By adopting the above technical solution, when the valve disc is set inside the valve body, it is convenient to limit it, so that under the action of the valve stem, the valve disc can move along the opening direction of the limiting groove to achieve the cutting off and circulation of the flow channel.

[0022] The present application provides a gate valve, which specifically includes the above-mentioned nut-embedded valve disc.

[0023] By adopting the above technical solution, the gate valve can achieve more stable operation in cutting off and flowing the flow channel.

[0024] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technologies:

[0025] 1. In this application, the transmission nut of the valve disc is installed in the installation groove on the valve disc frame. After the rubber layer is covered on the outside of the valve disc frame and the transmission nut, the valve disc frame, the transmission nut and the rubber layer form an integrated structure, so that the transmission nut is not easy to fall off. When the gate valve is in use, the transmission nut will not cut and damage the rubber layer under the torque of the valve stem rotation. At the same time, the rubber layer on the surface of the valve disc avoids the stratification of metal and rubber, thereby improving the overall quality of the product.

[0026] 2. In this application, after the transmission nut is installed in the installation groove and the boss is located in the positioning groove, the transmission nut is in direct contact with the valve disc frame. Under the action of torque, the transmission nut directly interacts with the valve disc frame, which can prevent the transmission nut from rotating and avoid cutting and damaging the rubber layer.

[0027] 3. In this application, the transmission nut is installed in the installation groove. The boss on the transmission nut enters the T-shaped opening groove and sinks into the positioning groove through a rotation angle. The operation is simple and convenient, and the rubber layer, valve disc frame, and transmission nut can be made into a whole after rubber coating, which can meet a wider range of performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure provided by the embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of a top view of the structure provided in an embodiment of the present application;

[0030] Figure 3 yes Figure 2 Schematic diagram of the cross-section structure along line AA;

[0031] Figure 4 This is a schematic diagram of the exploded structure of the valve disc frame and the transmission nut provided in an embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the installation groove provided in an embodiment of the present application.

[0033] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0034] 1. Valve disc frame; 11. Perforation; 12. Limiting protrusion; 13. Limiting groove; 2. Drive nut; 21. Boss; 3. Rubber coating; 4. Mounting groove; 41. T-shaped opening groove; 42. Positioning groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0036] Reference Figure 1-5 The present application discloses a nut-embedded valve disc comprising a valve disc frame 1, a drive nut 2, and an overmolding layer 3. The valve disc frame 1 is formed with a raised portion at its top by casting, and a mounting groove 4 is formed in the raised portion. The top and both sides of the mounting groove 4 are open structures. The drive nut 2 is embedded and positioned in the mounting groove 4, which provides a stable installation and prevents the drive nut 2 from falling off when the valve disc is subjected to force. The drive nut 2 has a center hole for the valve stem to pass through and threadedly connect. The center hole of the drive nut 2 is arranged in a vertical direction, which can achieve a fixed connection with the drive nut 2 without the need for pins, screws, internal and external threads, etc., which is simple, convenient, fast, and efficient, effectively reducing manufacturing costs. The overmolding layer 3 is coated on the outside of the valve disc frame 1 and the drive nut 2, and is integrally vulcanized to form the valve disc frame 1, the drive nut 2, and the overmolding layer 3 into an integrated structure. This ensures that the drive nut 2 is not easily detached. When the gate valve is in use, the drive nut 2 will not cut or damage the overmolding layer 3 under the torsion of the valve stem when the drive nut 2 rotates. In this application, the transmission nut 2 is in direct contact with the valve disc frame 1, with no glue layer in between, which will not cause the rubber layer 3 to be damaged; at the same time, the valve disc is rubber-coated so that the iron is never exposed, eliminating the phenomenon of metal and rubber stratification, thereby improving the overall quality of the product.

[0037] In this embodiment, a through hole 11 connected to the mounting groove 4 is opened in the vertical direction on the valve disc skeleton 1. The through hole 11 is connected to the center hole of the transmission nut 2 and can be used for the valve stem to pass through. After the transmission nut 2 is installed in the mounting groove 4, one end thereof is inserted into the through hole 11. Two symmetrically arranged bosses 21 are fixedly connected to the outer wall of the transmission nut 2. The bosses 21 limit the transmission nut 2 to prevent the transmission nut 2 from falling into the through hole 11 as a whole.

[0038] Specifically, the mounting groove 4 includes a T-shaped opening groove 41 and a positioning groove 42. The opening direction of the T-shaped opening groove 41 is perpendicular to the axis of the center hole of the transmission nut 2. After one end of the transmission nut 2 is inserted into the mounting groove 4, the transmission nut 2 is rotated with the axis of the center hole of the transmission nut 2 as the rotation axis, so that the boss 21 can be screwed into the T-shaped opening groove 41, so that the transmission nut 2 cannot be disengaged from the vertical direction; the positioning groove 42 is consistent with the shape and size of the boss 21. It is opened at the bottom of the T-shaped opening groove 41 for the boss 21 to be embedded, and the layout direction of the positioning groove 42 is perpendicular to the layout direction of the through hole 11, that is, the positioning groove 42 is horizontally arranged. After the boss 21 enters the T-shaped opening groove 41, the transmission nut 2 moves into the through hole 11 again. At this time, the boss 21 enters the positioning groove 42, thereby fixing the position of the transmission nut 2 to prevent the transmission nut 2 from spinning when twisted.

[0039] More specifically, in addition to covering the outside of the valve disc skeleton 1 and the transmission nut 2, the rubber layer 3 also fills the gap between the boss 21 and the inner wall of the T-shaped opening groove 41, and covers the inner wall of the through-hole 11. The rubber layer 3 is filled between the boss 21 and the inner wall of the T-shaped opening groove 41. The rubber layer 3 presses the boss 21 to prevent it from falling off from the positioning groove 42. The rubber layer 3 protects the inner wall of the through-hole 11 to prevent the valve stem and the valve disc skeleton 1 from touching and causing damage.

[0040] Furthermore, both sides of the valve flap skeleton 1 are fixedly connected to the limiting protrusion 12 by casting, without the need for adding other processing or surface treatment processes. The rubber layer 3 is covered on the outside of the limiting protrusion 12, and a limiting groove 13 is opened on the limiting protrusion 12. The opening direction of the limiting groove 13 is the same as the opening direction of the perforation 11. When the valve flap is set inside the valve body, it is convenient to limit its two sides, so that under the action of the valve stem, the valve flap can move along the opening direction of the limiting groove 13 to achieve the cutting off and circulation of the flow channel.

[0041] The present application also discloses a gate valve, comprising a valve body, a valve stem and the above-mentioned nut-embedded valve disc, wherein the valve stem is rotatably connected to the valve body and extends to the interior of the valve body, the nut-embedded valve disc is located inside the valve body and is vertically arranged, the valve stem passes through a transmission nut 2 and is threadedly connected to the transmission nut 2, the valve stem rotates with its axial direction as the rotation axis to drive the valve disc to move along the axial direction of the valve stem, thereby realizing the cutting off and flow of the flow channel.

[0042] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0043] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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 cannot be understood as a limitation on the present application.

[0044] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A nut-mounted valve disc, characterized in that: The invention comprises a valve flap frame (1), a transmission nut (2) and a rubber coating (3); the valve flap frame (1) is provided with a mounting groove (4); the transmission nut (2) is embedded and positioned in the mounting groove (4); and the rubber coating (3) covers the outside of the valve flap frame (1) and the transmission nut (2).

2. A nut-embedded valve disc according to claim 1, characterized in that: The valve disc frame (1) is provided with a through hole (11) communicating with the mounting groove (4); the through hole (11) is connected to the central hole of the transmission nut (2) and can be used for the valve stem to pass through.

3. A nut-embedded valve disc as claimed in claim 2, characterized in that: A boss (21) is fixedly connected to the outer wall of the transmission nut (2), and one end of the transmission nut (2) is inserted into the through hole (11).

4. A nut-embedded valve disc according to claim 3, characterized in that: The mounting groove (4) includes a T-shaped opening groove (41), the opening direction of the T-shaped opening groove (41) is perpendicular to the central hole axis of the transmission nut (2), and the transmission nut (2) is rotated with the central hole axis of the transmission nut (2) as the rotation axis, so that the boss (21) can enter the T-shaped opening groove (41).

5. A nut-embedded valve disc as claimed in claim 4, characterized in that: The mounting groove (4) further comprises a positioning groove (42) provided at the bottom of the T-shaped opening groove (41) for the boss (21) to be embedded in, and the positioning groove (42) is consistent in shape and size with the boss (21).

6. A nut-embedded valve disc according to claim 5, characterized in that: The arrangement direction of the positioning grooves (42) is perpendicular to the arrangement direction of the through holes (11).

7. The nut-mounted valve disc according to claim 5, characterized in that: The rubber coating (3) fills the gap between the boss (21) and the inner wall of the T-shaped opening groove (41).

8. The nut-mounted valve disc according to claim 2, characterized in that: The rubber coating (3) also covers the inner wall of the perforation (11).

9. A nut-mounted valve disc according to any one of claims 2 to 8, characterized in that: A limiting protrusion (12) is fixedly connected to the valve flap skeleton (1), and a limiting groove (13) is provided on the limiting protrusion (12). The direction in which the limiting groove (13) is provided is the same as the direction in which the through hole (11) is provided.

10. A gate valve, characterized in that: It comprises a nut-embedded valve disc as described in any one of claims 1-9.

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