Clamping assembly of check valve
By using a locking mechanism with a toothed disc and a misaligned locking structure for the nut in the check valve, the problem of nut loosening is solved, and the stability and tightness of the valve body connection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-03-24
AI Technical Summary
The nuts on existing check valves tend to loosen after being tightened, resulting in a loose valve body connection.
The system employs a snap-fit assembly, including a spring-loaded component and a limiting gear. The staggered locking structure between the limiting gear and the nut prevents the nut from loosening and ensures a tight connection.
It effectively prevents the nuts from loosening, ensures a tight connection between valve bodies, and improves the reliability of the check valve.
Smart Images
Figure CN224033295U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely is a kind of clamping assembly of check valve. BACKGROUND
[0002] Check valve is the closing element for circular valve flap and acts by its own weight and medium pressure to block the flow of medium, which belongs to automatic valve, also known as non-return valve, one-way valve, backflow valve or isolation valve.
[0003] The common installation mode of existing check valve is the mode that nut and bolt are locked, the upper flange and the lower flange are connected and fixed together to clamp the valve body, and in order to prevent the bolt loosening problem of the valve body of check valve during use, usually pad is installed between nut and valve body, but such structure can only delay the loosening problem of nut, and cannot prevent the loosening of nut for a long time. UTILITY MODEL CONTENT
[0004] In view of the deficiencies of prior art, the utility model aims at providing a kind of clamping assembly of check valve, can prevent nut from loosening after being screwed, guarantee the connection tightness between valve body.
[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of clamping assembly of check valve, including upper flange, valve body and lower flange, the screw rod of clamping valve body is arranged between the upper flange and the lower flange, the screw rod both ends are provided with the nut of screwing the upper flange and the lower flange, the clamping assembly is movably arranged on the side of the nut close to the upper flange, the clamping assembly includes elastic member and limit gear disc, the elastic member is arranged on the upper flange in annular shape, the limit gear disc one end is abutted on the elastic member, the other end is clamped on the side of the upper flange, the side of the nut is formed with the misaligned clamping of limit gear disc.
[0006] Preferably, the side of the upper flange is provided with mounting groove for installing limit gear disc, the elastic member is arranged at the bottom of mounting groove, limit opening is symmetrically arranged on both sides of the mounting groove, limit support is arranged on both sides of the limit gear disc, and the limit support is clamped on the limit opening.
[0007] Preferably, the limit opening is provided with limit protrusion on the opening end, and the limit support is provided with a gap opening on the side away from the limit gear disc.
[0008] Preferably, a plurality of racks in array are arranged on the limit gear disc and rotate clockwise, and the bottom of the nut is provided with a cross-shaped positioning rack.
[0009] Preferably, the side of the limit gear disc towards the elastic member is provided with a conical surface, and the conical surface is arranged in a gradually reducing state towards the elastic member.
[0010] Preferably, the limiting tooth disc is provided with an installation through hole for the screw to pass through.
[0011] The beneficial effects of the utility model are as follows: when installing, the elastic member is placed in the installation groove first, then the limiting tooth disc is pressed on the elastic member, the bottom abuts against the upper end of the elastic member, the limiting legs on the two sides of the limiting tooth disc are clamped on the limiting opening, the limiting protrusions are used for limiting to prevent the limiting legs from falling off, when the nut is tightened and gradually approaches the limiting tooth disc, the positioning rack at the bottom is used for extruding the limiting tooth disc downward to make room, when being tightened, the positioning rack is clamped on the plurality of racks, and the racks are arranged in a clockwise state, so that the nut is clamped with the racks when loosening, when disassembling, the pressing protrusions on the two sides of the limiting legs are pressed, at this time, the limiting tooth disc is lowered to make room, so that the nut can be normally screwed out, the purpose of the utility model is to provide a clamping assembly of check valve, which can prevent the nut from loosening after being tightened, and ensures the connection tightness between the valve bodies. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a whole structure schematic view of the utility model;
[0013] Fig. 2 It is a structure schematic view of the upper flange, screw rod, nut and clamping assembly of the utility model;
[0014] Fig. 3 It is an exploded view of the clamping assembly and nut of the utility model.
[0015] In the figure, 1 is an upper flange, 2 is a valve body, 3 is a lower flange, 4 is a screw rod, 5 is a nut, 8 is a clamping assembly, 9 is an elastic member, 10 is a limiting tooth disc, 11 is an installation groove, 12 is a limiting opening, 13 is a limiting leg, 14 is a limiting protrusion, 15 is a room opening, 16 is a pressing protrusion, 17 is a rack, 18 is a positioning rack, 19 is a conical surface, and 20 is an installation through hole. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0017] Embodiment: as shown in the accompanying drawings Figs. 1-3The diagram shows a snap-fit assembly 8 for a check valve, comprising an upper flange 1, a valve body 2, and a lower flange 3. A screw 4 for clamping the valve body 2 is disposed between the upper flange 1 and the lower flange 3. Nuts 5 for tightening the upper flange 1 and the lower flange 3 are disposed at both ends of the screw 4. A snap-fit assembly 8 is movably disposed on the side of the nut 5 near the upper flange 1. The snap-fit assembly 8 includes a spring element 9 and a limiting gear disc 10. The spring element 9 is annularly disposed on the upper flange 1. One end of the limiting gear disc 10 abuts against the spring element 9 (specifically, an annular spring), and the other end is snapped against one side of the upper flange 1. One side of the nut 5 and the limiting gear disc 10 are misaligned and snapped together. During installation, the spring element 9 is first placed in the mounting groove 11, and then the limiting gear disc 10 is pressed against the spring element 9, with its bottom abutting against the upper end of the spring element 9. Meanwhile, the limiting feet 13 on both sides of the limiting toothed disc 10 are locked onto the limiting opening 12. To prevent the limiting feet 13 from falling off, the limiting protrusions 14 are used for limiting. When the nut 5 is tightened and gradually approaches the limiting toothed disc 10, the positioning rack 1817 at the bottom is used to press the limiting toothed disc 10 downward to make room. When tightened, the positioning rack 1817 is locked onto several racks 17, and the racks 17 are set in a clockwise position, so that when the nut 5 is loose, it will be locked with the racks 17. When disassembly is required, simply press the pressing protrusions 16 on both sides of the limiting foot 13. At this time, the limiting toothed disc 10 will descend to make room, so that the nut 5 can be screwed out normally. The purpose of this utility model is to provide a locking component 8 for a check valve, which can prevent the nut from loosening after tightening and ensure the tightness of the connection between the valve bodies 2.
[0018] As attached Fig. 2 As shown, the upper flange 1 has a mounting groove 11 for mounting the limiting gear 10 on one side. The elastic member 9 is located at the bottom of the mounting groove 11. Limiting openings 12 are symmetrically opened on both sides of the mounting groove 11. Limiting feet 13 (integrated structure) are provided on both sides of the limiting gear 10. The limiting feet 13 are locked onto the limiting openings 12. The limiting feet 13 play a positioning role and prevent the limiting gear 10 from rotating.
[0019] As attached Fig. 2 As shown, a limiting protrusion 14 (a one-piece structure) extends from the opening end of the limiting opening 12, and a clearance opening 15 is provided on the limiting support leg 13. A pressing protrusion 16 (a one-piece structure) is provided on the side of the limiting support leg 13 away from the limiting toothed disc 10. The limiting protrusion 14 can prevent the limiting toothed disc 10 from falling off, while the pressing protrusion 16 can control the limiting toothed disc 10 to make downward clearance.
[0020] As attached Fig. 2As shown, the limiting tooth disc 10 is provided with a plurality of gear racks 17 (in an integral structure) rotating in a clockwise direction, and the bottom of the screw cap 5 is provided with a cross-shaped positioning gear rack 1817, which can be clamped with the gear rack 17.
[0021] As shown in the accompanying drawings, Fig. 2 As shown, the limiting tooth disc 10 is provided with a taper surface 19 towards the side of the elastic member 9, which is gradually reduced towards the side of the elastic member 9, and the taper surface 19 is matched with the annular elastic member 9 to realize the telescopic movement up and down, and the stability is better.
[0022] As shown in the accompanying drawings, Fig. 2 As shown, the limiting tooth disc 10 is provided with a taper surface 19 towards the side of the elastic member 9, which is gradually reduced towards the side of the elastic member 9, and the taper surface 19 is matched with the annular elastic member 9 to realize the telescopic movement up and down, and the stability is better.
[0023] In the utility model, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only the relationship words determined for the convenience of describing the structural relationship of the components or elements of the utility model, and cannot be understood as the limitation of the utility model.
Claims
1. A snap-fit assembly for a check valve, comprising an upper flange (1), a valve body (2) and a lower flange (3), wherein a screw (4) for clamping the valve body (2) is provided between the upper flange (1) and the lower flange (3), and nuts (5) for tightening the upper flange (1) and the lower flange (3) are provided at both ends of the screw (4), characterized in that; The nut (5) is movably provided with a snap-fit assembly (8) on the side near the upper flange (1). The snap-fit assembly (8) includes a spring element (9) and a limiting toothed disc (10). The spring element (9) is arranged in an annular shape on the upper flange (1). One end of the limiting toothed disc (10) abuts against the spring element (9), and the other end is snapped against one side of the upper flange (1). The nut (5) and the limiting toothed disc (10) are misaligned and snapped together.
2. The snap-fit assembly for a check valve according to claim 1, characterized in that: The upper flange (1) has an installation groove (11) for installing the limiting gear plate (10) on one side. The elastic member (9) is located at the bottom of the installation groove (11). Limit openings (12) are symmetrically opened on both sides of the installation groove (11). Limit feet (13) are provided on both sides of the limiting gear plate (10). The limit feet (13) are locked onto the limit openings (12).
3. The snap-fit assembly for a check valve according to claim 2, characterized in that: The limiting opening (12) is provided with a limiting protrusion (14) extending from the opening end, the limiting support (13) is provided with a clearance opening (15), and the limiting support (13) is provided with a pressing protrusion (16) on the side away from the limiting toothed disc (10).
4. The snap-fit assembly for a check valve according to claim 3, characterized in that: The limiting toothed disc (10) is provided with a plurality of toothed racks (17) arranged in a clockwise rotation array, and the bottom of the nut (5) is provided with a positioning toothed rack (18)(17) in a cross shape.
5. The snap-fit assembly for a check valve according to claim 4, characterized in that: The limiting toothed disc (10) is provided with a tapered surface (19) on the side facing the elastic member (9), and the tapered surface (19) is provided in a gradually decreasing state on the side facing the elastic member (9).
6. The snap-fit assembly for a check valve according to claim 5, characterized in that: The limiting gear plate (10) has an installation through hole (20) for the screw (4) to pass through.