Maintenance-free flange ball valve

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a maintenance-free flange ball valve which comprises a valve body, sealing valve seats and a ball body, a plurality of sealing valve seats are arranged between the ball body and the valve body, and the contact surfaces of the sealing valve seats, the valve body and the ball body are coated with elastic sealing layers. Elastic protrusions are arranged on the contact face, in the perpendicular direction of the valve body, of the elastic sealing layer, sealing protrusions are arranged on the contact face, in the perpendicular direction of the valve body, of the elastic sealing layer, the contact face, in the perpendicular direction of the valve body, of the elastic sealing layer, and the contact face, in the perpendicular direction of the valve body, of the elastic sealing layer and the ball body are provided with sealing protrusions.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball valves, and particularly relates to a maintenance-free flange ball valve. Background Art

[0002] In the prior art, the valve seat of the ball valve is mostly made of high molecular polymer materials such as polytetrafluoroethylene and para-polyphenylene, but such valve seats need to be regularly maintained and lubricated by injecting lubricating fluid. In addition, such materials are relatively soft and the surface is easily damaged, which also brings certain problems. Utility Model Content

[0003] The utility model provides a maintenance-free flange ball valve, which can solve the problems pointed out in the background technology.

[0004] A maintenance-free flange ball valve comprises a valve body, a sealing valve seat and a ball, wherein a plurality of sealing valve seats are arranged between the ball and the valve body, an elastic sealing layer is coated on the contact surface between the sealing valve seat and the valve body and the ball, an elastic protrusion is arranged on the contact surface between the elastic sealing layer and the valve body in a direction perpendicular to the contact surface, and a sealing protrusion is arranged on the contact surface between the elastic sealing layer and the valve body and the ball.

[0005] Preferably, the elastic sealing layer is a rubber sealing layer.

[0006] Preferably, the rubber sealing layer and the sealing valve seat are connected via a mounting groove.

[0007] Preferably, it further comprises an upper valve stem and a lower valve stem, wherein an upper self-lubricating bushing and a lower self-lubricating bushing are respectively arranged between the upper valve stem and the lower valve stem and the valve body.

[0008] Preferably, the upper valve stem and the lower valve stem are both stainless steel valve stems, and the upper self-lubricating sleeve and the lower self-lubricating sleeve are both self-lubricating copper sleeves.

[0009] Preferably, the lower end of the lower valve stem is fixed to the valve body by a bolt assembly.

[0010] Preferably, the valve body is integrally formed.

[0011] Beneficial effects: The utility model provides a maintenance-free flange ball valve, which can be maintenance-free and does not require the injection of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 For this utility model Figure 1 The enlarged schematic diagram of point A in the middle.

[0014] Description of reference numerals:

[0015] Reference numerals in the figure: valve body 1; sealing valve seat 2; ball 3; elastic sealing layer 4; elastic protrusion 41; sealing protrusion 42; mounting groove 43; upper valve stem 51; lower valve stem 52; self-lubricating bushing 53; lower self-lubricating bushing 54. DETAILED DESCRIPTION

[0016] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0017] Embodiment 1:

[0018] like Figure 1-2 As shown, a maintenance-free flange ball valve comprises a valve body 1, a sealing valve seat 2 and a ball 3, wherein a plurality of sealing valve seats 2 are arranged between the ball 3 and the valve body 1, and an elastic sealing layer 4 is coated on the contact surface between the sealing valve seat 2 and the valve body 1 and the ball 3, and an elastic protrusion 41 is arranged on the contact surface between the elastic sealing layer 4 and the valve body 1 in a vertical direction, that is, a horizontal elastic protrusion 41, and an inward horizontal thrust is given to the sealing valve seat 2 through the elastic protrusion 41, so that the sealing valve seat 2 and the ball 3 are tightly sealed, and a sealing protrusion 42 is arranged on the contact surface between the elastic sealing layer 4 and the valve body 1 and the ball 3.

[0019] Specifically, the elastic sealing layer 4 is a rubber sealing layer, and the rubber sealing layer is connected to the sealing valve seat 2 via a mounting groove 43 .

[0020] Embodiment 2:

[0021] In this embodiment, an upper valve stem 51 and a lower valve stem 52 are also included. An upper self-lubricating sleeve 53 and a lower self-lubricating sleeve 54 are respectively provided between the upper valve stem 51 and the lower valve stem 52 and the valve body 1. The upper valve stem 51 and the lower valve stem 52 are both stainless steel valve stems. The upper self-lubricating sleeve 53 and the lower self-lubricating sleeve 54 are both self-lubricating copper sleeves. Through the cooperation of the copper sleeve and the stainless steel valve stem, the valve stem can be maintenance-free, which is more convenient for customers to use.

[0022] The lower end of the lower valve stem 52 is fixed to the valve body 1 by a bolt assembly, that is, the lower valve stem 52 is fixed, and the lower end of the ball 3 rotates around it as the rotation axis, and the upper valve stem 51 rotates to drive the ball 3 to rotate.

[0023] The valve body 1 is integrally formed and does not require secondary connection, so it is easy to assemble.

[0024] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A maintenance-free flange ball valve, comprising a valve body (1), a sealing valve seat (2) and a ball (3), wherein a plurality of sealing valve seats (2) are arranged between the ball (3) and the valve body (1), characterized in that: The contact surfaces between the sealing valve seat (2) and the valve body (1) and the ball (3) are coated with an elastic sealing layer (4); the contact surfaces between the elastic sealing layer (4) and the valve body (1) in a direction perpendicular to the contact surfaces are provided with elastic protrusions (41); and the contact surfaces between the elastic sealing layer (4) and the valve body (1) and the ball (3) are provided with sealing protrusions (42).

2. A maintenance-free flange ball valve according to claim 1, characterized in that: The elastic sealing layer (4) is a rubber sealing layer.

3. A maintenance-free flange ball valve according to claim 2, characterized in that: The rubber sealing layer and the sealing valve seat (2) are connected via a mounting groove (43).

4. A maintenance-free flange ball valve according to any one of claims 1 to 3, characterized in that: It also comprises an upper valve stem (51) and a lower valve stem (52), wherein an upper self-lubricating shaft sleeve (53) and a lower self-lubricating shaft sleeve (54) are respectively arranged between the upper valve stem (51) and the lower valve stem (52) and the valve body (1).

5. A maintenance-free flange ball valve according to claim 4, characterized in that: The upper valve stem (51) and the lower valve stem (52) are both stainless steel valve stems, and the upper self-lubricating shaft sleeve (53) and the lower self-lubricating shaft sleeve (54) are both self-lubricating copper shaft sleeves.

6. A maintenance-free flange ball valve according to claim 5, characterized in that: The lower end of the lower valve stem (52) is fixed to the valve body (1) via a bolt assembly.

7. A maintenance-free flange ball valve according to any one of claims 1 to 3, characterized in that: The valve body (1) is integrally formed.

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