Limiting connection structure of hand wheel assembly of manual diaphragm valve

Abstract

The utility model belongs to the technical field of diaphragm valves, and particularly relates to a limiting connection structure of a hand wheel assembly of a manual diaphragm valve, which comprises a hand wheel and an indicating ring in running fit with the hand wheel, according to the limiting connection structure of the hand wheel assembly of the manual diaphragm valve, the angle limiting structure is not prone to being abraded to affect use, the angle limiting structure is not prone to being abraded, the indicating ring rotates relative to the indicating ring with the rotating guide shaft as the rotating axis, and the indicating ring is internally provided with a second limiting piece matched with the first limiting piece in a limiting mode to achieve limiting of the rotating angle of the hand wheel and the indicating ring. The service life is long and the stability is high; die-casting forming can be achieved, and production efficiency is high; in addition, side screws are adopted for locking, the attractiveness of the product is improved, rusting can be effectively avoided, and the tooth-shaped holes are matched for jointly locking and limiting, so that the connection stability of the whole structure can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to diaphragm valve technical field, especially relate to a kind of limit connection structure of hand wheel subassembly of manual diaphragm valve. BACKGROUND

[0002] Manual diaphragm valve is a kind of common cut-off valve, its general structure includes manual execution mechanism and valve body, manual execution mechanism generally includes hand wheel subassembly, hand wheel subassembly includes hand wheel and the indicating ring rotationally matched with hand wheel, indicating ring has indicating label on it to indicate position, angle limiting structure is equipped between hand wheel and indicating ring;

[0003] At present, angle limiting structure in prior art is generally set with an arc-shaped guide ring on hand wheel, and the limiting guide column that is limitedly matched with arc-shaped guide ring is arranged at the corresponding position of indicating ring;This structure has the following shortcomings: long-time use of arc-shaped guide ring may be seriously worn, and may appear shaking condition and possibly affect the fluency of rotation;

[0004] In the existing structure, hand wheel and valve body adjusting rod are generally fixed by screw at the top, which is exposed outside, affecting the appearance of the product and being prone to rust, and the connection stability needs to be improved. INVENTION CONTENTS

[0005] The utility model provides a kind of limit connection structure of hand wheel subassembly of manual diaphragm valve, can solve the problems pointed out in background art.

[0006] A kind of limit connection structure of hand wheel subassembly of manual diaphragm valve, including hand wheel and the indicating ring rotationally matched with hand wheel, rotation guide shaft is arranged at the rotation center of hand wheel, rotation guide shaft is equipped with first limiting piece, indicating ring is relatively rotated with rotation guide shaft as rotation axis, second limiting piece that is limitedly matched with first limiting piece is arranged in indicating ring, to realize the limitation of rotation angle of hand wheel and indicating ring.

[0007] Preferably, first limiting piece and second limiting piece are both limiting lugs.

[0008] Preferably, hand wheel and indicating ring are integrally formed by die casting respectively.

[0009] Preferably, thread hole is arranged on the side surface of indicating ring, and the thread hole cooperates with screw for locking adjusting rod, and the corresponding position of hand wheel is provided with channel for screw.

[0010] Preferably, the channel is a through slot or a through hole.

[0011] Preferably, rotation guide shaft is annular structure, and connecting hole for connecting with adjusting rod is arranged at the axis of rotation guide shaft, and limiting structure is arranged in connecting hole, to avoid the circumferential relative rotation between adjusting rod and hand wheel by limiting structure.

[0012] Preferably, the connecting hole is a tooth-shaped hole.

[0013] Beneficial effects: the utility model provides a kind of limit connection structure of manual diaphragm valve hand wheel subassembly, angle limit structure is not easy to wear to influence use, long service life, high stability;It can be pressure die forming, and production efficiency is high;In addition, adopt side screw locking, improve the product's aesthetic degree, can also effectively avoid rust, again cooperation tooth-shaped hole is locked together limit, can guarantee the connection stability of entire structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structure diagram of the utility model,

[0015] Fig. 2 It is the structure diagram of the utility model indicating ring,

[0016] Fig. 3 It is the structure diagram of the utility model hand wheel,

[0017] BRIEF DESCRIPTION OF DRAWINGS

[0018] Marked in the figure: hand wheel 1;Rotary guide shaft 11;Connecting hole 111;Limit structure 112;First limit piece 12;Passage 13;Indicating ring 2;Second limit piece 21;Threaded hole 22. DETAILED DESCRIPTION

[0019] The utility model is described in detail in combination with the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiment.

[0020] Example 1:

[0021] As Figs. 1-3 Indicated, a kind of limit connection structure of manual diaphragm valve hand wheel subassembly, including hand wheel 1 and with the indicating ring 2 of rotation cooperation of hand wheel 1, rotary center is equipped with rotary guide shaft 11 in hand wheel 1, rotary guide shaft 11 is equipped with first limit piece 12, indicating ring 2 is relatively rotated with rotary guide shaft 11 as rotary axis, indicating ring 2 is equipped with second limit piece 21 with the limit cooperation of first limit piece 12, to realize the limitation of the rotation angle of hand wheel 1 and indicating ring 2, specifically, first limit piece 12 and second limit piece 21 are all limit lugs.

[0022] In some embodiments, hand wheel 1 and indicating ring 2 are integrally formed by pressure casting respectively, i.e. first limit piece 12 and hand wheel 1 and indicating ring 2 and second limit piece 21 can be integrally formed by pressure casting, so that it is convenient to process.

[0023] In some embodiments, the side of the indicating ring 2 is provided with a threaded hole 22, which cooperates with a screw for locking the adjusting rod, and the hand wheel 1 is provided with a corresponding passage 13 for the screw, which is a through slot or a through hole.

[0024] The rotating guide shaft 11 is annular, and the center thereof is provided with a connecting hole 111 connected with the adjusting rod. The connecting hole 111 is provided with a limiting structure 112, which avoids the circumferential relative rotation between the adjusting rod and the hand wheel 1. The connecting hole 111 is a tooth-shaped hole.

[0025] The above only discloses several specific embodiments of the present application, but the embodiments of the present application are not limited to this. Any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A stop connection structure of a hand wheel assembly of a manual diaphragm valve, comprising a hand wheel (1) and an indicating ring (2) in rotational cooperation with the hand wheel (1), characterized in that: The rotating guide shaft (11) is provided at the rotating center of the hand wheel (1), and the first limiting part (12) is arranged on the rotating guide shaft (11); the indicating ring (2) rotates relative to the rotating guide shaft (11) as the rotating axis; the second limiting part (21) is arranged in the indicating ring (2) and is limited by the first limiting part (12), so as to limit the rotating angle of the hand wheel (1) and the indicating ring (2).

2. The stop connection structure of a manual diaphragm valve hand wheel assembly according to claim 1, characterized in that: The first limiting part (12) and the second limiting part (21) are limiting protrusions.

3. The stop connection structure of a manual diaphragm valve hand wheel assembly according to claim 2, characterized in that: The hand wheel (1) and the indicating ring (2) are integrally formed by die casting.

4. The stopper connecting structure of a hand wheel assembly of a manual diaphragm valve according to any one of claims 1-3, characterized in that: A threaded hole (22) is arranged on the side surface of the indicating ring (2), and the threaded hole (22) is matched with a screw for locking the adjusting rod; the hand wheel (1) is provided with a channel (13) corresponding to the screw.

5. The stop connection structure of a manual diaphragm valve handwheel assembly according to claim 4, characterized in that: The channel (13) is a through groove or a through hole.

6. The stopper connecting structure of a handwheel assembly of a manual diaphragm valve according to any one of claims 1-3, characterized in that: The rotating guide shaft (11) is in an annular structure, and a connecting hole (111) connected with the adjusting rod is arranged at the axis of the rotating guide shaft (11); a limiting structure (112) is arranged in the connecting hole (111), so that the adjusting rod and the hand wheel (1) are prevented from rotating relative to each other in the circumferential direction.

7. The stop connection structure of a handwheel assembly of a manual diaphragm valve according to claim 6, characterized in that: The connecting hole (111) is a tooth-shaped hole.

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