Sealing screw plug with double O-shaped rings

Abstract

The utility model discloses a double O-shaped ring sealing screw plug which comprises a plug head and a plug rod, the end face of the plug head is provided with a wound gasket, a first O-shaped ring is arranged in a tool withdrawal groove of the plug rod, and the end face, away from the plug head, of the plug rod is provided with a second O-shaped ring. The screw plug is used for a large drain outlet in the bottom of the valve body of the ball valve, is good in sealing performance, short in structure and suitable for small-caliber and low-pressure ball valves, and the wall of the valve body is thin; through sealing of the two sealing rings, the valve is good in sealing performance, compact in structure, short in plug screw and suitable for valves with thick and thin valve body walls.

Description

Technical Field

[0001] The utility model relates to a double O-ring sealing screw plug, belonging to the technical field of ball valves. Background Art

[0002] Traditional screw plugs use tapered pipe threads, which have poor sealing performance and are prone to leakage. They can only be used up to 69MPa. On the one hand, traditional screw plugs have poor sealing performance during use. On the other hand, after being used for a period of time, the fixation of the screw plug is easy to loosen. Utility Model Content

[0003] The utility model aims to overcome the deficiencies in the prior art and provides a double O-ring sealing screw plug.

[0004] A double O-ring sealing screw plug comprises a plug head and a plug rod. The end face of the plug head is provided with a winding pad, a first O-ring is provided in a backing groove of the plug rod, and a second O-ring is provided on the end face of the plug rod away from the plug head.

[0005] Furthermore, the plug is provided with a locking plate, and the locking plate is equipped with a screw.

[0006] Furthermore, the locking piece is placed on the hexagonal head of the plug through the hexagonal hole.

[0007] Furthermore, the locking plate is provided with a crescent hole, and the screw passes through the crescent hole of the locking plate and is fixed on the valve body.

[0008] Furthermore, a groove one is provided on the end surface of the plug, and the winding pad is arranged in the groove one.

[0009] Furthermore, a second groove is formed on the end surface of the plug rod away from the plug head, and the second O-ring is arranged in the second groove.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model screw plug is used for the large drain port at the bottom of the valve body of the ball valve, and has good sealing performance;

[0012] The utility model has a short screw plug structure and is suitable for small-caliber, low-pressure ball valves with thin valve body walls;

[0013] The utility model is sealed by two sealing rings, has good sealing performance, compact structure, short screw plug and is suitable for valves with thin valve body wall thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the locking piece and screw of the utility model;

[0016] In the figure: 1. Screw plug; 2. Plug head; 3. Wrapped gasket; 4. O-ring 1; 5. O-ring 2; 6. Locking plate; 7. Screw; 8. Plug rod. Implementation

[0017] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0018] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0019] like Figure 1-2 As shown, a double O-ring sealing plug is disclosed, the plug 1 comprises a plug head 2 and a plug rod 8, the groove at the front end of the plug head 2 and the thread of the plug rod 8 are kept at a distance to avoid the internal thread backsliding groove of the valve body and the introduction angle of the O-ring 4, the end face of the plug head 2 is provided with a winding pad 3, and the backsliding groove of the plug rod 8 is provided with an O-ring 4, so that the space of the backsliding groove is fully utilized, and a separate groove is not required, which is convenient for disassembly together with the plug; the end face of the plug rod 8 away from the plug head 2 is provided with an O-ring 2 5, which serves as the first sealing ring of the plug, and the O-ring 2 can be disassembled and installed together with the plug.

[0020] The plug 2 is provided with a locking piece 6, which is placed on the hexagonal head of the plug 2 through a hexagonal hole. The locking piece 6 is equipped with a screw 7, which is provided with a crescent hole, and the screw 7 is fixed to the valve body through the crescent hole of the locking piece, so that the screw plug can only be selected at 60°, to prevent loosening and falling off after vibration.

[0021] The end surface of the plug 2 is provided with a groove 1, and the winding pad 3 is arranged in the groove 1.

[0022] The end surface of the plug rod 8 away from the plug head 2 is provided with a second groove, and the second O-ring 5 is arranged in the second groove.

[0023] O-ring 5 is the first seal. After the sealing area fails due to corrosion, O-ring 4 can still perform the sealing function. O-ring 4 is behind the thread, so less medium can pass through and the sealing area fails slowly due to corrosion.

[0024] Through the above embodiments, the screw plug of the utility model is used for the large drain port at the bottom of the valve body of the ball valve, has good sealing performance, and has a short screw plug structure. It is suitable for small-caliber, low-pressure ball valves with thin valve body walls; it is sealed by two sealing rings, has good sealing performance, a compact structure, and a short screw plug, and is suitable for valves with thin valve body walls.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A double O-ring sealing screw plug, the screw plug (1) comprising a plug head (2) and a plug rod (8), characterized in that: The end surface of the plug head (2) is provided with a winding pad (3), the backing groove of the plug rod (8) is provided with an O-ring 1 (4), and the end surface of the plug rod (8) away from the plug head (2) is provided with an O-ring 2 (5).

2. The double O-ring sealing screw plug according to claim 1 is characterized in that: The plug (2) is provided with a locking plate (6), and the locking plate (6) is equipped with a screw (7).

3. The double O-ring sealing screw plug according to claim 2 is characterized in that: The locking piece (6) is placed on the hexagonal head of the plug (2) through the hexagonal hole.

4. The double O-ring sealing screw plug according to claim 2 is characterized in that: The locking plate (6) is provided with a crescent hole, and the screw (7) passes through the crescent hole of the locking plate and is fixed on the valve body.

5. The double O-ring sealing screw plug according to claim 1 is characterized in that: A groove one is formed on the end surface of the plug (2), and the winding pad (3) is arranged in the groove one.

6. The double O-ring sealing screw plug according to claim 1, characterized in that: A second groove is formed on the end surface of the plug rod (8) away from the plug head (2), and the second O-ring (5) is arranged in the second groove.

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