Clean ball valve particle anti-falling cover

Abstract

The utility model relates to the technical field of ball valves, and provides a clean ball valve particle anti-falling cover which comprises an anti-falling cover body, the anti-falling cover body is arranged between a valve rod and a ball body, an inserting hole for a connecting part of the valve rod to penetrate through is formed in the anti-falling cover body, the top of the anti-falling cover body is in close contact with the valve rod, and the top of the anti-falling cover body is in close contact with the ball body. And the bottom of the anti-falling cover body is in close contact with the ball body. According to the particle anti-falling cover for the clean ball valve, metal particles generated due to friction and extrusion between the connecting part of the valve rod and the ball body cannot enter a pipeline system, and the purity and quality of system products are prevented from being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely relates to a clean ball valve particle anti -drop cover. BACKGROUND

[0002] Ball valves are often used with pipelines to control the flow of medium in the pipeline. For some special system pipelines, especially in the pipeline environment with very high cleanliness requirements, such as electronic-grade polysilicon production, food production, and pharmaceutical production, because of the structure of the ball valve, friction and extrusion will inevitably occur between the connecting part of the valve stem and the ball during the opening and closing process. Therefore, some metal particles generated by friction and extrusion will cause pollution to the pipeline system, ultimately leading to a decrease in the purity of the system product or a substandard product quality. SUMMARY

[0003] In view of the defects in the prior art, the utility model aims to provide a clean ball valve particle anti-drop cover, so that the metal particles generated by friction and extrusion between the connecting part of the valve stem and the ball will not enter the pipeline system, avoiding affecting the purity and quality of the system product.

[0004] To achieve the above-mentioned purpose, the utility model realizes the technical scheme as follows: a clean ball valve particle anti-drop cover, comprising an anti-drop cover body, the anti-drop cover body is arranged between the valve stem and the ball, an insertion hole is formed in the anti-drop cover body for the connecting part of the valve stem to pass through, the top of the anti-drop cover body is in close contact with the valve stem, and the bottom of the anti-drop cover body is in close contact with the ball.

[0005] Further, the insertion hole is adapted to the connecting part of the valve stem.

[0006] Further, the bottom of the anti-drop cover body is formed with an arc surface, and the arc surface is adapted to the ball.

[0007] Further, a closed space is formed between the anti-drop cover body, the valve stem and the ball.

[0008] Further, the top of the anti-drop cover body is formed with a stepped groove, the stepped groove is in communication with the insertion hole, and the stepped groove is adapted to the stem of the valve stem.

[0009] Further, the anti-drop cover body is made of polytetrafluoroethylene, polytetrafluoroethylene glass fiber or rubber.

[0010] The utility model discloses a clean ball valve particle anti -drop cover, and the anti -drop cover body is arranged between the valve stem and the ball, and the main function is just to prevent the metal particle that the ball valve switch process inevitably produces from entering into the pipeline system, guarantees the cleanness of the pipeline system, thereby avoids the influence system product's purity and quality. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is structural schematic diagram that the utility model is assembled in the ball valve;

[0012] Fig. 2 It is three -dimensional structure schematic diagram under the first visual angle of the utility model;

[0013] Fig. 3 It is three -dimensional structure schematic diagram under the second visual angle of the utility model.

[0014] Sign significance: 10-ball valve, 11-ball, 12-valve stem, 121-rod, 122-connection, 20-anti -drop cover body, 21-insert hole, 22-arc face, 23-staircase groove. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0016] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0017] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "vertical", "horizontal", "horizontal", "top", "bottom", "upper", "lower", "inner" and "outer" is based on the orientation or position relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0018] In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0019] As Figs. 1-3 shown, the utility model provides a clean ball valve particle prevents and takes off cover, with ball valve 10 cooperation uses, ball valve 10 includes ball 11 and valve stem 12, valve stem 12 includes stem body 121 and connecting portion 122. Because of assembly and process limit, ball 11 and valve stem 12 are not direct welding between, but connecting portion 122 of valve stem 12 drives ball 11 rotation through friction and extrusion, and then controls the opening and closing of ball valve 10. The above content is all prior art, and specific structure will not be repeated here.

[0020] The utility model discloses a prevent and take off cover body 20, prevent and take off cover body 20 set up between valve stem 12 and ball 11. The insertion hole 21 that prevent and take off cover body 20 are opened has the connecting portion 122 of valve stem 12 passes through, and the top of prevent and take off cover body 20 is in close contact with valve stem 12, and the bottom of prevent and take off cover body 20 is in close contact with ball 11.

[0021] When assembling, prevent and take off cover body 20 is on the valve stem 12, to prevent prevent and take off cover body 20 from falling during assembly.

[0022] The utility model is mainly used for some special system pipeline, especially in the pipeline environment of very high cleanliness requirement. In the utility model, prevent and take off cover body 20 set up between valve stem 12 and ball 11, and the main function is just prevent and take off cover body 20 during the switching of ball valve 10 the connecting portion 122 of valve stem 12 and ball 11 between friction extrusion produce's metal particle thing to enter into the pipeline system, guarantee the cleanliness of pipeline system, to avoid the influence system product's purity and quality, effectively solved this problem.

[0023] In an embodiment, the insertion hole 21 is adapted to the connecting portion 122 of the valve stem 12. This can make the assembly of the prevent and take off cover body 20 more stable and avoid loosening.

[0024] In an embodiment, the bottom of the prevent and take off cover body 20 is formed with an arc surface 22, which is adapted to the ball 11. This can make the prevent and take off cover body 20 better adapt to the ball 11, so that the bottom of the prevent and take off cover body 20 is in closer contact with the ball 11.

[0025] In an embodiment, a closed space is formed between the prevent and take off cover body 20, the valve stem 12 and the ball 11. The metal particles produced by the friction and extrusion between the connecting portion 122 of the valve stem 12 and the ball 11 during the switching of the ball valve 10 will be contained in the closed space and will not enter the pipeline system.

[0026] In one embodiment, the top of the anti-dropping cover 20 is formed with a stepped groove 23, which is communicated with the insertion hole 21 and is adapted to the stem 121 of the valve stem 12. The stepped groove 23 is designed to increase the contact area between the valve stem 12 and the anti-dropping cover 20 and to bend the contact position, so that the metal particles generated by the friction and extrusion between the connecting part 122 of the valve stem 12 and the ball 11 are less likely to leak out.

[0027] In one embodiment, the anti-dropping cover 20 is made of polytetrafluoroethylene, polytetrafluoroethylene glass fiber or rubber, etc. and has certain toughness.

[0028] The basic principle and main features of the present application and the advantages of the present application are shown and described above. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0029] In addition, it should be understood that although the present application is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A clean ball valve particle retention hood, characterized by: The anti-falling cover is arranged between the valve rod and the ball, and has a hole for the connecting part of the valve rod to pass through, the top of the anti-falling cover is in close contact with the valve rod, and the bottom of the anti-falling cover is in close contact with the ball.

2. A clean ball valve particle retention boot according to claim 1, wherein: The hole is adapted to the connecting part of the valve rod.

3. A clean ball valve particle retention cover according to claim 1, wherein: The bottom of the anti-falling cover is formed with an arc surface which is adapted to the ball.

4. A clean globe valve particle retention boot according to claim 3, wherein: A closed space is formed between the anti-falling cover, the valve rod and the ball.

5. A clean globe valve particle retention boot according to claim 1, wherein: The top of the anti-falling cover is formed with a stepped groove which is in communication with the hole and is adapted to the rod body of the valve rod.

6. A clean globe valve particle retention boot according to claim 1, wherein: The anti-falling cover is made of polytetrafluoroethylene, polytetrafluoroethylene glass fiber or rubber material.

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