Novel manual diaphragm valve

Abstract

The utility model belongs to the technical field of diaphragm valves, and particularly relates to a novel manual diaphragm valve which comprises a manual diaphragm valve body, the manual diaphragm valve body comprises a valve body, a diaphragm assembly, a manual execution assembly, a middle shaft sleeve and an adjusting rod penetrating through the middle shaft sleeve, and a resistance piece is arranged between the middle shaft sleeve and the adjusting rod. According to the novel manual diaphragm valve, the resistance piece is additionally arranged between the middle shaft sleeve and the adjusting rod, so that an operator feels resistant, and certain safety is brought to the operator.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of diaphragm valve, especially a novel manual diaphragm valve. BACKGROUND

[0002] Manual diaphragm valve is a kind of common cut-off valve, and its general structure includes valve body, diaphragm assembly, manual execution assembly, middle shaft sleeve and adjusting rod penetrating through middle shaft sleeve, and the manual execution mechanism includes hand wheel assembly, the hand wheel assembly drives adjusting rod to rotate, and the middle shaft sleeve is generally gap fitted with adjusting rod;This structure form has a small defect, after long-term use, the hand wheel assembly rotates easily, and manual diaphragm valve is generally applicable to high pressure environment, and this easy feeling can bring fault feeling, and operating personnel can easily think that there is a problem in the valve body, in addition, it can also bring shaking feeling, how to overcome this defect by simple structure is one of our research and development directions;

[0003] In addition, the hand wheel assembly includes a hand wheel and an indicating ring in rotational engagement with the hand wheel, and the indicating ring has an indicating label for position indication, and an angle limiting structure is arranged between the hand wheel and the indicating ring.

[0004] At present, the angle limiting structure in the prior art generally comprises an arc-shaped guide ring arranged on the hand wheel, and a limiting guide column in limiting engagement with the arc-shaped guide ring arranged at a corresponding position of the indicating ring;This structure has defects, and the arc-shaped guide ring can be seriously worn after long-term use, which can cause shaking and can affect the smoothness of rotation;

[0005] In the existing structure, the hand wheel and the valve body adjusting rod are generally fixed by screws at the top, the screws are exposed, which can affect the appearance of the product and easily rust, and the connection stability needs to be improved.

[0006] In the existing structure, a flange plate is arranged on the valve body to limit and fix the lower end of the middle shaft sleeve and the diaphragm assembly, and this fixing structure is relatively troublesome to assemble. UTILITY MODEL CONTENTS

[0007] The utility model provides a novel manual diaphragm valve, which can solve the problems in the background art.

[0008] A novel manual diaphragm valve, comprising a manual diaphragm valve body, the manual diaphragm valve body comprising a valve body, a diaphragm assembly, a manual execution assembly, a middle shaft sleeve and an adjusting rod penetrating through the middle shaft sleeve, a resistance element is arranged between the middle shaft sleeve and the adjusting rod, and the relative resistance of the middle shaft sleeve and the adjusting rod when rotating is improved by the resistance element.

[0009] Preferably, the resistance element is an O-shaped ring embedded in the lower part of the adjusting rod.

[0010] Preferably, the manual execution assembly comprises a hand wheel and an indicating ring matched with the hand wheel in rotation, a rotation guide shaft is arranged at the rotation center of the hand wheel, the rotation guide shaft is provided with a first limiting piece, the indicating ring is relatively rotated around the rotation guide shaft as the rotation axis, and the indicating ring is provided with a second limiting piece matched with the first limiting piece in limiting, so that the rotation angle of the hand wheel and the indicating ring is limited.

[0011] Preferably, the first limiting piece and the second limiting piece are limiting lugs.

[0012] Preferably, a threaded hole is arranged on the side surface of the indicating ring, a screw is matched with the threaded hole for locking the adjusting rod, and the hand wheel is provided with a channel through which the screw passes at the corresponding position.

[0013] Preferably, the channel is a through groove or a through hole.

[0014] Preferably, the rotation guide shaft is in an annular structure, a connecting hole connected with the adjusting rod is arranged at the axis of the rotation guide shaft, and a limiting structure is arranged in the connecting hole, so that the adjusting rod and the hand wheel are prevented from rotating relative to each other in the circumferential direction.

[0015] Preferably, the connecting hole is a tooth-shaped hole.

[0016] Preferably, a fastening nut is arranged on the valve body, and the lower end of the central shaft sleeve and the diaphragm assembly are limited and fixed through the fastening nut.

[0017] Beneficial effects: the novel manual diaphragm valve increases a resistance piece between the central shaft sleeve and the adjusting rod, gives the operator a sense of resistance, and brings a certain sense of safety;

[0018] The angle limiting structure is not easy to wear and tear to affect use, has a long service life, and has high stability; in addition, the side screw locking improves the appearance of the product, can effectively prevent rust, and cooperates with the tooth-shaped hole to jointly lock and limit, so that the connection stability of the whole structure is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the utility model,

[0020] Figure 2 is a structural schematic view of the manual execution assembly of the utility model,

[0021] Figure 3 is a structural schematic view of the indicating ring of the utility model,

[0022] Figure 4 is a structural schematic view of the hand wheel of the utility model,

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] Valve body 1; Middle shaft sleeve 2; Adjusting rod 3; Resistance piece 4; Hand wheel 51; Rotating guide shaft 511; Connecting hole 5111; Limiting structure 5112; First limiting piece 512; Passage 513; Indicating ring 52; Second limiting piece 521; Threaded hole 522; Fastening nut 6; Diaphragm assembly 7. DETAILED DESCRIPTION

[0025] One specific embodiment of the present application will be described in detail below with reference to the drawings, but it should be understood that the scope of protection of the present application is not limited by the specific embodiment.

[0026] Example 1:

[0027] As shown in Figure 1 A new type of manual diaphragm valve, comprising a manual diaphragm valve body, the manual diaphragm valve body comprising a valve body 1, a diaphragm assembly 7, a manual execution assembly, a middle shaft sleeve 2 and an adjusting rod 3 penetrating the middle shaft sleeve 2, a resistance piece 4 is arranged between the middle shaft sleeve 2 and the adjusting rod 3, the relative resistance when the middle shaft sleeve 2 and the adjusting rod 3 rotate is improved by the resistance piece 4, the resistance piece 4 is an O-shaped ring embedded in the lower part of the adjusting rod 3, the O-shaped ring is arranged to increase the resistance feeling and effectively avoid the shaking feeling.

[0028] Example 2:

[0029] As shown in Figures 2-4 The manual execution assembly comprises a hand wheel 51 and an indicating ring 52 rotatably connected with the hand wheel 51, a rotating guide shaft 511 is arranged at the rotating center of the hand wheel 51, the rotating guide shaft 511 is provided with a first limiting piece 512, the indicating ring 52 rotates relative to the rotating guide shaft 511 as the rotating shaft, the indicating ring 52 is provided with a second limiting piece 521 which is limited and matched with the first limiting piece 512, so as to limit the rotation angle of the hand wheel 51 and the indicating ring 52, specifically, the first limiting piece 512 and the second limiting piece 521 are both limiting protrusions.

[0030] Specifically, a threaded hole 522 is arranged on the side surface of the indicating ring 52, the threaded hole 522 is matched with a screw for locking the adjusting rod 3, the hand wheel 51 is provided with a passage 513 corresponding to the position for the screw to pass through, and the passage 513 is a through slot or a through hole.

[0031] Specifically, the rotating guide shaft 511 is in an annular structure, the axis thereof is provided with a connecting hole 5111 connected with the adjusting rod 3, the connecting hole 5111 is provided with a limiting structure 5112, the limiting structure 5112 is used to avoid the circumferential relative rotation between the adjusting rod 3 and the hand wheel 51, and the connecting hole 5111 is a tooth-shaped hole.

[0032] Example 3:

[0033] As shown in Figure 1As shown, the valve body 1 is provided with a fastening nut 6, the middle shaft sleeve 2 lower end and the diaphragm assembly 7 are limited and fixed through the fastening nut 6, the diaphragm assembly 7 includes a diaphragm, a valve seat, a diaphragm compression ring and a diaphragm sealing shaft.

[0034] The above disclosed are only 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 by any person skilled in the art should fall into the protection scope of the present application.

Claims

1. A novel manual diaphragm valve, comprising a manual diaphragm valve body, the manual diaphragm valve body comprising a valve body (1), a diaphragm assembly (7), a manual actuation assembly, a central bushing (2), and an adjusting rod (3) passing through the central bushing (2), characterized in that: A resistance element (4) is provided between the central bushing (2) and the adjusting rod (3) to increase the relative resistance between the central bushing (2) and the adjusting rod (3) when they rotate.

2. The novel manual diaphragm valve according to claim 1, characterized in that: The resistance element (4) is an O-ring embedded in the lower part of the adjusting rod (3).

3. A novel manual diaphragm valve according to any one of claims 1-2, characterized in that: The manual execution component includes a handwheel (51) and an indicator ring (52) that rotates in cooperation with the handwheel (51). A rotation guide shaft (511) is provided at the rotation center of the handwheel (51). The rotation guide shaft (511) is provided with a first limiting member (512). The indicator ring (52) rotates relative to the rotation guide shaft (511) as the rotation axis. The indicator ring (52) is provided with a second limiting member (521) that limits the first limiting member (512) to limit the rotation angle between the handwheel (51) and the indicator ring (52).

4. A novel manual diaphragm valve according to claim 3, characterized in that: Both the first limiting member (512) and the second limiting member (521) are limiting protrusions.

5. A novel manual diaphragm valve according to claim 4, characterized in that: The indicator ring (52) has a threaded hole (522) on its side. The threaded hole (522) is used with a screw to lock the adjusting rod. The handwheel (51) has a channel (513) at the corresponding position for the screw to pass through.

6. A novel manual diaphragm valve according to claim 5, characterized in that: The channel (513) is a through groove or through hole.

7. A novel manual diaphragm valve according to claim 6, characterized in that: The rotating guide shaft (511) is an annular structure with a connecting hole (5111) at its center for connecting to the adjusting rod. A limiting structure (5112) is provided in the connecting hole (5111) to prevent the adjusting rod from rotating relative to the handwheel (51) in the circumference.

8. A novel manual diaphragm valve according to claim 7, characterized in that: The connecting hole (5111) is a toothed hole.

9. A novel manual diaphragm valve according to any one of claims 1-2, characterized in that: The valve body (1) is provided with a fastening nut (6), which is used to limit and fix the lower end of the central bushing (2) and the diaphragm assembly (7).

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