Fixed ball valve

Abstract

The utility model discloses a fixed ball valve, and belongs to the technical field of ball valves. The fixed ball valve comprises a valve body, a valve cover is arranged on the valve body, valve seats are arranged at the seat hole end of the valve cover, and a ball body is arranged between the valve seats. A valve rod is arranged at the top of the valve body, a gland flange is arranged at the joint of the valve rod and the valve body, and a top flange is arranged at the top of the gland flange; the valve rod penetrates through the valve body, the gland flange and the top flange to be connected with the ball shaft plane of the ball body. The valve seat is connected with the valve cover through a spring; an external automatic discharging device is arranged at the joint of the cavity discharging hole of the valve body and the downstream of the valve cover; the DIB-1 fixed ball valve with the short structure has the characteristics that the valve structure is simple, the weight is light, the requirement of a customer on an installation space is met, an external automatic discharge device is arranged at the joint of the cavity discharge hole of the valve body and the downstream of the valve cover, the requirements of global atmospheric pollution and environment protection can be met, the manufacture and the installation are convenient, and the sealing performance is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of fixed ball valves, belong to ball valve technical field. BACKGROUND

[0002] The valve used in the existing reserve device for producing petroleum, process pipeline of offshore oil platform and large pressure pipeline of ship is mainly fixed ball valve connected by flange or clamp, which can realize bidirectional blocking isolation and double sealing, and the valve achieves complete zero leakage limited by the design and process level of manufacturer.

[0003] However, the total length of the existing valve is very long, bulky and heavy, which is not conducive to the limited installation space of platform ship body. The original DIB-1 valve cannot automatically discharge medium, and cannot play a role in pressure reduction. An automatic pressure relief valve is arranged in the valve cavity, which discharges the valve by using the automatic pressure relief valve to play a role in overpressure protection. However, the use of the automatic pressure relief valve can only discharge excess medium and gas into the atmosphere without any external environmental protection measures, polluting the environment and causing adverse effects on the environment. SUMMARY

[0004] The utility model aims at overcoming the deficiencies in the prior art and providing a fixed ball valve.

[0005] To achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme:

[0006] A fixed ball valve comprises a valve body, the valve body is provided with a valve cover, the seat hole end of the valve cover is provided with a valve seat, and a ball body is arranged between the valve seats.

[0007] The top of the valve body is provided with a valve stem, the valve stem is connected with the valve body at the valve stem and valve body connection, the valve stem is provided with a gland flange at the top of the gland flange, and the valve stem is connected with the ball shaft plane of the ball body at the valve stem penetrating the valve body, the gland flange and the top flange; the valve seat and the valve cover are connected by a spring.

[0008] The cavity discharge hole of the valve body is connected with the downstream of the valve cover, and an external automatic discharge device is arranged at the connection position.

[0009] Optionally, a seat O-ring and a seat fireproof pad are arranged between the valve seat and the valve cover.

[0010] Optionally, the cavity passage of the valve body is directly connected with the passage of the valve cover and the passage of the ball body.

[0011] Optionally, a valve stem O-ring is arranged in the sealing area of the gland flange and the valve stem.

[0012] Optionally, a valve stem fireproof pad is arranged at the connection position of the gland flange and the valve body.

[0013] Optionally, the valve body and the valve cover are connected with a body O-ring and a body winding gasket.

[0014] Optionally, the valve body and the valve cover are connected with a body O-ring and a body winding gasket.

[0015] Optionally, the valve body and the valve cover are connected with a body O-ring and a body winding gasket.

[0016] Compared with the prior art, the utility model has reached the beneficial effects: the utility model short structure, DIB-1 fixed ball valve has simple valve structure, light weight, meets the customer installation space requirement, is equipped with external automatic drainage device at the cavity discharge hole and the valve cover downstream connection of the valve body, can respond to global atmospheric pollution, protects the requirement of environment, and the manufacturing installation is convenient, and the sealing performance is good characteristics. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is one embodiment structure schematic view of the utility model fixed ball valve,

[0018] Figure 2 It is one embodiment structure schematic view of the utility model fixed ball valve,

[0019] In the drawing: 1, valve body;2, valve cover;3, ball body;4, valve rod;5, gland flange;6, top flange;7, valve seat;8, spring;9, seat O-ring;10, valve rod O-ring;11, valve rod fireproof pad;12, middle cavity discharge device;13, seat fireproof pad;14, body winding gasket;15, body O-ring;16, gland winding gasket;17, gland O-ring;18, screw. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings. The following examples are only used for more clearly explaining the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0021] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. 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 technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0022] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0023] As shown in Figure 1 A fixed ball valve is disclosed, comprising a valve body 1, the valve body 1 is provided with a valve cover 2, the seat hole end of the valve cover 2 is provided with a valve seat 7, the valve seat 7 is provided with a ball 3 between the valve seat 7;

[0024] The top of the valve body 1 is provided with a valve stem 4, the valve stem 4 is provided with a gland flange 5 at the connection of the valve stem 4 and the valve body 1, the top of the gland flange 5 is provided with a top flange 6, the valve stem 4 penetrates the valve body 1, the gland flange 5, the top flange 6 and the ball shaft plane of the ball 3 is connected, in the specific implementation process, the cavity passage of the valve body 1 is directly connected with the passage of the valve cover 2 and the passage of the ball 3, the valve seat 7 and the valve cover 2 are connected through the spring 8, which ensures the initial sealing of the ball 3 and the valve seat 7, the flange end passage of the valve body 1 is communicated with the diameter of the middle cavity, the ball 3 is installed from the inner cavity of the valve body, and the valve seat 7 is pressed into the valve cover hole;

[0025] The cavity discharge hole of the valve body 1 is provided with an external automatic drainage device 12 at the downstream connection of the valve cover 2, so that the overpressure medium can be directly drained into the pipeline, instead of polluting the environment outside the pipeline. When installing the external automatic drainage device 12, pay attention to the fluid direction during installation. The external automatic drainage device 12 is used instead of the traditional discharge valve, which greatly protects the environment.

[0026] In the embodiment, the valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13. Figure 1 The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0027] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0028] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0029] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0030] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0031] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0032] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

[0033] The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13. The valve seat 7 and the valve cover 2 are provided with a seat O-ring 9 and a seat fireproof pad 13.

Claims

1. A fixed ball valve, characterized in that, The valve includes a valve body, the valve body is provided with a valve cover, the valve cover is provided with a valve seat at the seat hole end, and a ball is provided between the valve seats; The valve body is provided with a valve stem at the top, and a gland flange is provided at the connection between the valve stem and the valve body. A top flange is provided at the top of the gland flange. The valve stem passes through the valve body, the gland flange, and the top flange and is connected to the ball axis plane of the ball. The valve seat and the valve cover are connected by a spring. An external automatic drainage device is provided at the connection between the cavity vent of the valve body and the downstream of the valve cover.

2. The fixed ball valve according to claim 1, characterized in that, An O-ring and a fireproof pad are provided between the valve seat and the valve cover.

3. The fixed ball valve according to claim 1, characterized in that, The cavity channel of the valve body is directly connected to the channel of the valve cover and the channel of the ball.

4. The fixed ball valve according to claim 1, characterized in that, The gland flange and valve stem sealing area are provided with a valve stem O-ring.

5. The fixed ball valve according to claim 1, characterized in that, A fireproof gasket for the valve stem is provided at the connection between the gland flange and the valve body.

6. The fixed ball valve according to claim 1, characterized in that, The valve body and valve cover are connected by an O-ring and a spiral wound gasket.

7. The fixed ball valve according to claim 1, characterized in that, The valve body and valve cover are connected by a clamping thread and fixed by screws.

8. The fixed ball valve according to claim 1, characterized in that, A gland spiral wound gasket and a gland O-ring are provided between the gland flange and the valve body.

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