Anti-loosening nut structure of all-plastic loose joint ball valve

Abstract

The utility model relates to an all-plastic loose joint ball valve locking nut structure which comprises a valve body, a movable joint and a movable joint locking nut, a conical surface flange ring is integrally formed at the inner end of a valve body threaded column, and a plurality of strip-shaped clamping protrusions A are evenly formed along the conical surface of the conical surface flange ring. An annular conical surface corresponding to the conical surface flange ring is formed at the edge opening of the inner end of the movable joint locking nut, a plurality of strip-shaped clamping protrusions B are evenly formed along the annular conical surface at intervals, and the distance between every two adjacent strip-shaped clamping protrusions B is approximately similar to the width of a single strip-shaped clamping protrusion A. When the movable joint locking nut and the valve body threaded column are screwed tightly, the strip-shaped clamping protrusion A and the strip-shaped clamping protrusion B can be clamped with each other under the extrusion effect, and the clamping force is enough to prevent the movable joint locking nut from self reverse rotation under the internal high pressure effect. Therefore, the situation that in the long-term use process of the all-plastic loose joint ball valve, due to the fact that the lock nut of the loose joint is gradually loosened, leakage and leakage are caused at the joint of the loose joint and the valve body is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline valve equipment technical field especially is related to a full plastic live joint ball valve anti-loose nut structure. BACKGROUND

[0002] Full plastic live joint ball valve has the characteristics of flexible opening and closing and simple operation, and shows its unique application advantage in fluid control field. Full plastic live joint ball valve includes valve body, valve core, valve handle, live joint, sealing ring, live joint locking nut and other components, the valve body has threaded column, the live joint is connected with the valve body through the screwing of the live joint locking nut and the threaded column of the valve body to keep close connection. At present, the full plastic live joint ball valve with existing structure will have the phenomenon of slow self-reverse rotation of the live joint locking nut which has been screwed tight due to the effect of high pressure in the pipeline and valve body during long-term use, which leads to the gradual decrease of the tightness of the connection between the live joint and the valve body, and finally causes the leakage at the connection. SUMMARY

[0003] The utility model solves the technical problem that provides a full plastic live joint ball valve anti-loose nut structure to overcome the defects and deficiencies of the prior art and products as described in the background.

[0004] The utility model adopts the technical scheme that a full plastic live joint ball valve anti-loose nut structure, including valve body, live joint and live joint locking nut, the valve body has threaded column, the live joint is connected with the valve body through the screwing of the live joint locking nut and the threaded column of the valve body to keep close connection, the inner end of the threaded column of the valve body is integrally formed with conical flange ring, a plurality of strip-shaped convex A are uniformly formed along the taper of the conical flange ring, and the inner end of the live joint locking nut is formed with the annular taper corresponding to the conical flange ring along the mouth, and a plurality of strip-shaped convex B are uniformly and spacedly formed along the annular taper, the distance between the adjacent two strip-shaped convex B is substantially similar to the width of the single strip-shaped convex A, the surface of the strip-shaped convex A and the strip-shaped convex B is smooth arc surface shape.

[0005] Further, the strip-shaped convex A formed along the taper of the conical flange ring has four.

[0006] The full plastic adapter ball valve anti-loose nut structure has the advantages that when the adapter locking nut is tightened with the threaded column of the valve body, the strip-shaped clamping protrusions A and B are also clamped with each other under the extrusion, and the clamping force is sufficient to prevent the adapter locking nut from being reversed under the high pressure, thereby effectively preventing the adapter and the valve body from being connected to leak due to the gradually loosened adapter locking nut during long-term use of the full plastic adapter ball valve. BRIEF DESCRIPTION OF DRAWINGS

[0007] The utility model will be further described below in combination with the drawings and examples.

[0008] Figure 1 is the three-dimensional structure schematic diagram of the utility model (the state that the adapter locking nut is separated from the valve body, the arrow indicates the assembly direction);

[0009] Figure 2 is the three-dimensional structure schematic diagram of the adapter locking nut in the utility model.

[0010] In the drawing: 1. valve body; 1-1. threaded column; 1-2. conical flange ring; 1-3. strip-shaped clamping protrusion A; 2. adapter; 3. adapter locking nut; 3-1. strip-shaped clamping protrusion B. DETAILED DESCRIPTION

[0011] A full plastic adapter ball valve anti-loose nut structure, as shown in Figure 1 , Figure 2 , it includes valve body 1, adapter 2 and adapter locking nut 3, the valve body 1 has threaded column 1-1, the adapter 2 is connected closely with the valve body 1 by the screwing of the adapter locking nut 3 and the threaded column 1-1 of the valve body 1, the conical flange ring 1-2 is formed integrally at the inner end of the threaded column 1-1 of the valve body 1, a plurality of strip-shaped clamping protrusions A 1-3 are uniformly formed along the taper of the conical flange ring 1-2, and a corresponding annular taper is formed along the mouth of the inner end of the adapter locking nut 3, and a plurality of strip-shaped clamping protrusions B 3-1 are uniformly and spacedly formed along the annular taper, the spacing between the adjacent two strip-shaped clamping protrusions B 3-1 is substantially similar to the width of a single strip-shaped clamping protrusion A 1-3; the surfaces of the strip-shaped clamping protrusions A 1-3 and the strip-shaped clamping protrusions B 3-1 are both smooth arc surfaces.

[0012] The number of the strip-shaped clamping protrusions A 1-3 formed along the taper of the conical flange ring 1-2 does not have to be too much, and in the embodiment, there are four.

[0013] When the union joint locking nut 3 is screwed with the valve body threaded column 1-1, the strip-shaped clamping convex A1-3 and the strip-shaped clamping convex B 3-1 are also clamped with each other under the extrusion effect (the tighter the screwing is, the tighter the clamping is), and the clamping force is sufficient to prevent the union joint locking nut 3 from being "back-rotated" under the action of internal high pressure, thereby effectively preventing the situation that the union joint 2 and the valve body 1 are connected to leak in the long-term use of the full-plastic union joint ball valve due to the gradual loosening of the union joint locking nut 3. When the union joint locking nut 3 needs to be disassembled, because there is an additional clamping force between the union joint locking nut 3 and the valve body 1, the reverse screwing force is appropriately increased (with the help of a wrench tool) at the initial stage of reverse screwing.

[0014] The above embodiments are only used for explaining the utility model, and are not limited to the protection of the utility model. Any non-substantial change based on the essential scheme of the utility model should fall within the protection scope of the utility model.

Claims

1. A plastic full plastic union ball valve anti-loose nut cap structure, comprising a valve body (1), a union joint (2) and a union joint locking nut (3), the valve body (1) has a threaded column (1-1), the union joint (2) is tightly connected with the valve body (1) through the union joint locking nut (3) and the screwing of the threaded column (1-1) of the valve body (1), characterized in that: The taper flange ring (1-2) is integrally formed at the inner end of the threaded column (1-1) of the valve body (1), and a plurality of strip-shaped clamping protrusions A (1-3) are uniformly formed along the taper of the taper flange ring (1-2); the inner end of the union locking nut (3) is formed with a ring-shaped taper corresponding to the taper flange ring (1-2), and a plurality of strip-shaped clamping protrusions B (3-1) are uniformly and spacedly formed along the ring-shaped taper; the spacing between two adjacent strip-shaped clamping protrusions B (3-1) is substantially similar to the width of a single strip-shaped clamping protrusion A (1-3); the surfaces of the strip-shaped clamping protrusions A (1-3) and the strip-shaped clamping protrusions B (3-1) are both smooth arc surfaces. ​ 2. The full plastic live loaded ball valve anti-loose nut cap structure according to claim 1, characterized in that: The strip-shaped clamping protrusions A (1-3) formed along the taper of the taper flange ring (1-2) are four in number.

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