Sealing tool for valve shaft of flow control valve

Abstract

The utility model discloses a sealing tool for a valve shaft of a flow control valve, and belongs to the field of valve shaft maintenance equipment. A sealing tool for a valve shaft of a flow control valve comprises a positioner which comprises a first circular ring body, and one end of the first circular ring body is provided with a first cavity matched with a flexible diaphragm; the pressing tool comprises a second circular ring body, and an extrusion structure matched with the first cavity is arranged at one end of the second circular ring body; the outer diameter of the second circular ring body is smaller than or equal to the inner diameter of the first circular ring body. According to the sealing tool, the rejection rate of materials is reduced, the installation efficiency is improved, and the installation quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve shaft maintenance equipment field, especially, relate to a kind of sealing tool of flow control flap valve shaft. BACKGROUND

[0002] The material used for valve shaft sealing is a flexible diaphragm, which has an axial sealing effect. The thickness of the flexible diaphragm is not greater than 0.15 mm, and it is very soft. The installation efficiency is low using general tools, and the flexible shaft seal is easily deformed, which cannot meet the sealing effect, resulting in high scrap rate and low work efficiency. SUMMARY

[0003] The utility model discloses a sealing tool for flow control flap valve shaft, which overcomes the shortcomings of the prior art.

[0004] The utility model discloses a sealing tool for flow control flap valve shaft, which overcomes the shortcomings of the prior art.

[0005] The positioner includes a first circular ring body, and one end of the first circular ring body is provided with a first cavity adapted to the flexible diaphragm.

[0006] The press includes a second circular ring body, and one end of the second circular ring body is provided with an extrusion structure adapted to the first cavity. The outer diameter of the second circular ring body is less than or equal to the inner diameter of the first circular ring body.

[0007] The guide structure includes a first cylindrical body, one end of the first cylindrical body is provided with a guide block, and the other end of the first cylindrical body is provided with a second cavity adapted to the valve shaft.

[0008] Further, one end of the first circular ring body is inwardly recessed to form the first cavity.

[0009] Further, one end of the second circular ring body is outwardly extended to form the extrusion structure.

[0010] Further, the extrusion structure includes a third circular ring body, and the inner wall of the third circular ring body is connected with the outer wall of the second circular ring body.

[0011] Further, the outer diameter of the third circular ring body is greater than the inner diameter of the first circular ring body.

[0012] Further, the guide block is a bullet head structure.

[0013] Further, the outer diameter of the first cylindrical body is greater than the outer diameter of the valve shaft.

[0014] Further, the outer diameter of the first cylindrical body is 0.02-0.03 mm greater than the outer diameter of the valve shaft.

[0015] Further, the outer diameter of the first cylinder is less than the inner diameter of the second ring body.

[0016] Compared with the prior art, the sealing tool in the utility model is used for mounting the flexible diaphragm on the valve shaft, the mounting process will not cause the flexible diaphragm to be deformed, the mounting is convenient, the material scrap rate is greatly reduced, the mounting efficiency is improved, and the mounting quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the embodiments of the utility model, constitute a part of this application, and do not constitute the limitation to the embodiments of the utility model.In the drawings:

[0018] Figure 1 It is a schematic view for clamping the flexible diaphragm into the first cavity;

[0019] Figure 2 It is a schematic view for guiding the flexible diaphragm to be mounted on the valve shaft;

[0020] Figure 3 It is a schematic view for removing the sealing tool;

[0021] In the drawings, 1 is a positioner, 11 is a first cavity, 2 is a pressing tool, 21 is an extrusion structure, 3 is a guide structure, 4 is a flexible diaphragm, and 5 is a valve shaft. DETAILED DESCRIPTION

[0022] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments.

[0023] Wherein, the drawings are only used for example description, and the representation is only a schematic view, not a physical view, and can not be understood as the limitation to the present application; in order to better illustrate the embodiments of the present application, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some known structures and their description in the drawings can be omitted.

[0024] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms such as "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for example description, and can not be understood as the limitation to the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] In the description of the present application, unless otherwise explicitly specified and limited, if the term "connection" and the like appear to indicate the connection relationship between components, the term should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0026] As shown in Figures 1 to 3 The utility model discloses a sealing tool for flow control valve shaft.

[0027] As shown in Figure 1 A sealing tool for flow control valve shaft, comprising a positioner, a press and a guide structure 3.

[0028] The positioner 1 comprises a first circular ring body, and one end of the first circular ring body is provided with a first cavity 11 matched with the flexible diaphragm 4. For example, the first circular ring body has a first end and a second end, and the first end of the first circular ring body is provided with the first cavity 11.

[0029] The press 2 comprises a second circular ring body, and one end of the second circular ring body is provided with an extrusion structure 21 matched with the first cavity 11. For example, the second circular ring body has a first end and a second end, and the first end of the second circular ring body is provided with the extrusion structure 21. The outer diameter of the second circular ring body is less than or equal to the inner diameter of the first circular ring body, so that the second circular ring body can extend into the first circular ring body.

[0030] The guide structure 3 comprises a first cylinder, one end of the first cylinder is provided with a guide block, and the other end of the first cylinder is provided with a second cavity matched with the valve shaft 5.

[0031] When the sealing tool is used to install the flexible diaphragm 4 on the valve shaft 5, first, the flexible diaphragm 4 is placed on the extrusion structure 21 of the second circular ring body, the extrusion structure 21 is aligned with the first cavity 11, the positioner 1 or the press 2 is moved, the flexible diaphragm 4 is installed in the first cavity 11, so that the flexible diaphragm 4 is clamped in the first cavity 11, as shown in Figure 1 The guide structure 3 is installed on the valve shaft 5 through the cooperation of the second cavity and the valve shaft 5, then the flexible diaphragm 4 is guided and installed on the valve shaft 5 through the guide structure 3, and finally the positioner 1 is pressed down, so that the flexible diaphragm 4 touches the bottom, as shown in Figure 2As shown; the second end of the second circular ring body is inserted into the first circular ring body from the second end of the first circular ring body, the flexible diaphragm 4 is pressed by the pressing tool 2, then the locator 1 is lifted, the flexible diaphragm 4 is separated from the locator 1, then the pressing tool 2 is lifted, and the guide structure 3 is removed from the valve shaft 5, the installation of the flexible diaphragm 4 is completed, as shown. Figure 3

[0032] The height of the second circular ring body is greater than the height of the first circular ring body, so that the pressing tool 2 can push the flexible diaphragm 4 out of the first cavity 11. Specifically, the height of the part of the second circular ring body which is not provided with the extrusion structure 21 is greater than the height of the first circular ring body.

[0033] Because the outer diameter of the second circular ring body is less than or equal to the inner diameter of the first circular ring body, the pressing tool 2 can be stored in the locator 1, reducing the occupied space.

[0034] In some embodiments of the present embodiment, one end of the first circular ring body is inwardly recessed to form the first cavity 11. Specifically, a recess for placing the flexible diaphragm 4 is formed at one end of the first circular ring body, and the recess is the first cavity 11.

[0035] In some embodiments of the present embodiment, one end of the second circular ring body extends outwardly to form the extrusion structure 21. Specifically, the outer wall of one end of the second circular ring body extends outwardly to form a circular ring body structure, and the circular ring body structure is the extrusion structure 21. One end of the extrusion structure 21 is flush with the nearest end of the second circular ring body.

[0036] In some embodiments of the present embodiment, the extrusion structure 21 comprises a third circular ring body, and the inner wall of the third circular ring body is connected with the outer wall of the second circular ring body. Specifically, the inner wall of the third circular ring body is attached to and connected with the outer wall of the second circular ring body. The third circular ring body is integrally formed with the second circular ring body, or the third circular ring body is connected with the second circular ring body by bonding or the like.

[0037] In some embodiments of the present embodiment, the outer diameter of the third circular ring body is greater than the inner diameter of the first circular ring body, so that the extrusion structure 21 cannot be inserted into the locator 1, facilitating the separation of the pressing tool 2 from the locator 1 after the pressing tool 2 is stored in the locator 1.

[0038] In some embodiments of the present embodiment, the guide block is a bullet head structure. When installing the flexible diaphragm 4, if there is no guide structure 3, the inner hole of the flexible diaphragm 4 is easily damaged, resulting in a poor seal. In the present embodiment, the inner hole of the flexible diaphragm is prevented from being damaged by providing the guide structure 3, improving the installation quality of the flexible diaphragm 4.

[0039] In some embodiments of the present embodiment, the outer diameter of the first circular cylinder is greater than the outer diameter of the valve shaft 5.​

[0040] In some embodiments of the present embodiment, the outer diameter of the first cylinder is 0.02-0.03mm larger than the outer diameter of the valve shaft 5. If the outer diameter of the first cylinder is smaller than the outer diameter of the valve shaft 5, the inner hole of the flexible diaphragm 4 is easily damaged during installation, and if the outer diameter of the first cylinder is too large, the inner hole of the flexible diaphragm 4 is also easily damaged during installation.

[0041] In some embodiments of the present embodiment, the outer diameter of the first cylinder is smaller than the inner diameter of the second ring body, so that the guide structure 3 can be installed in the press 2 during storage, thereby reducing the occupied space.

[0042] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A seal tool for a flow control valve stem, comprising: The utility model relates to a valve structure of a valve, and it comprises the following: A positioner, which comprises a first circular ring body, one end of the first circular ring body is provided with a first cavity which is matched with a flexible diaphragm; A pressing tool, which comprises a second circular ring body, one end of the second circular ring body is provided with a pressing structure which is matched with the first cavity, and the outer diameter of the second circular ring body is less than or equal to the inner diameter of the first circular ring body; A guide structure, which comprises a first cylinder, one end of the first cylinder is provided with a guide block, and the other end of the first cylinder is provided with a second cavity which is matched with a valve shaft.

2. A seal tool for a flow control valve stem as defined in claim 1, wherein, One end of the first circular ring body is inwardly recessed to form the first cavity.

3. A seal fixture for a flow control valve stem as defined in claim 1, wherein, One end of the second circular ring body is outwardly extended to form the pressing structure.

4. A seal fixture for a flow control valve stem as defined in claim 1, wherein, The pressing structure comprises a third circular ring body, and the inner wall of the third circular ring body is connected with the outer wall of the second circular ring body.

5. A seal fixture for a flow control valve stem as defined in claim 4, wherein, The outer diameter of the third circular ring body is greater than the inner diameter of the first circular ring body.

6. A seal fixture for a flow control valve stem as defined in claim 1, wherein, The guide block is a bullet head structure.

7. A seal fixture for a flow control valve stem as defined in claim 1, wherein, The outer diameter of the first cylinder is greater than the outer diameter of the valve shaft.

8. A seal fixture for a flow control valve stem as defined in claim 1, wherein, The outer diameter of the first cylinder is 0.02-0.03mm greater than the outer diameter of the valve shaft.

9. A seal fixture for a flow control valve stem as defined in claim 1, wherein, The outer diameter of the first cylinder is less than the inner diameter of the second circular ring body.

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