Bidirectional sealing ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a two-way sealing ball valve which comprises a valve body and a butt joint pipe, the two ends of the valve body are fixedly connected with connecting pipes respectively, sealing assemblies are arranged between the connecting pipes and the butt joint pipe, and tensioning assemblies are further arranged between the connecting pipes and the butt joint pipe. The sealing assembly comprises an annular plate arranged between the connecting pipe and the butt joint pipe, the annular plate is of a T-shaped structure, two annular sealing gaskets are fixedly connected to the inner side wall of the annular plate in a bilateral symmetry mode, and the connecting pipe and the butt joint pipe abut against the annular sealing gaskets. According to the connecting structure, the connecting position can be protected while sealing is conducted, the service life of the connecting structure is prolonged, and in addition, the sealing effect is better by adopting the hollow annular rubber pad.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, specifically related to a bidirectional sealing ball valve. BACKGROUND

[0002] Ball valve is a kind of common valve for controlling fluid flow, is widely used in numerous industrial and civil fields, the opening and closing degree of control ball valve can be utilized, the control of pipeline flow is realized, is the important component in the pipeline conveying system.

[0003] The ball valve in the prior art usually increases rubber pad between flanges to increase sealing property when butt joint of pipeline, but there is certain gap between flanges of rubber pad, especially when using in natural environment, the aging rate of rubber pad is faster, this problem is one of the main reasons of pipeline system leakage, therefore, the bidirectional sealing ball valve is provided to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a bidirectional sealing ball valve, can carry out protection to connecting position while sealing, prolongs the service life of connecting structure, in addition, hollow annular rubber pad is adopted, and sealing effect is better.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A bidirectional sealing ball valve, including valve body and butt joint pipe, the both ends of valve body are fixedly connected with connecting pipe respectively, sealing assembly is arranged between connecting pipe and butt joint pipe, and tensioning assembly is also arranged between connecting pipe and butt joint pipe.

[0007] The sealing assembly includes annular plate arranged between connecting pipe and butt joint pipe, the annular plate is T-shaped structure, two annular sealing pads are fixedly connected on the inner side wall of annular plate and symmetrically left and right, and connecting pipe and butt joint pipe are all abutted with annular sealing pad.

[0008] The tensioning assembly includes fixed plate fixedly connected on the side wall of connecting pipe and butt joint pipe, the fixed plate is annular, a plurality of through holes are formed in the side wall of fixed plate respectively, one screw rod is arranged between two through holes on the same axis, and nut is threadedly connected on the side wall of screw rod.

[0009] The side wall of connecting pipe and butt joint pipe is fixedly connected with limiting block respectively, and the fixed plate is abutted with limiting block.

[0010] Protective sleeve is sleeved between connecting pipe and butt joint pipe, clamp is sleeved on protective sleeve, and clamp is fastened on connecting pipe and butt joint pipe respectively.

[0011] The annular sealing pad and annular plate are cavity.

[0012] The utility model discloses the technical effect obtained is:

[0013] The utility model discloses a two -way sealed ball valve through the mutual cooperation of valve body, connecting pipe, butt -joint pipe and sealing assembly, utilize annular gasket and two -sided pipeline end face closely combined, because annular gasket adopts hollow structure, therefore, have greater resilience, can closely fit between pipeline, and cooperate with the use of protective sleeve, can guarantee that sealing assembly and tension assembly are all in sealed environment, thereby prolong its life. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the perspective view of the utility model embodiment;

[0015] Figure 2 It is the cross -section structure schematic diagram of the utility model embodiment;

[0016] Figure 3 It is the structure schematic diagram of the utility model embodiment tension assembly;

[0017] Figure 4 It is the perspective view of the utility model embodiment sealing assembly;

[0018] Figure 5 It is the cross -section structure schematic diagram of the utility model embodiment sealing assembly.

[0019] In the drawings, the component list represented by each sign is as follows:

[0020] 1, valve body;2, connecting pipe;3, butt -joint pipe;4, fixed plate;5, screw;6, nut;7, annular plate;8, annular gasket;9, limit block;10, protective sleeve;11, clamp. DETAILED DESCRIPTION

[0021] In order to make the purpose and the advantage of the utility model more clear and obvious, the utility model is specifically explained below with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope requested by the utility model.

[0022] As Figures 1-5 Indicated, a two -way sealed ball valve, including valve body 1 and butt -joint pipe 3, valve body 1 both ends are fixedly connected with connecting pipe 2, and sealing assembly is arranged between connecting pipe 2 and butt -joint pipe 3, and tension assembly is also arranged between connecting pipe 2 and butt -joint pipe 3.

[0023] Among them, the connecting pipe 2 of both ends of valve body 1 can adopt the sealing structure in the present scheme, realizes two -way sealing, in the drawing of the present scheme, only the sealing structure of one side is indicated, and the sealing mode of both sides is identical, therefore, too much is not expressed in the drawing.

[0024] As Figure 2 and Figure 5 shown, the sealing assembly comprises an annular plate 7 arranged between the connecting pipe 2 and the butt pipe 3, the annular plate 7 is T-shaped structure, two annular sealing pads 8 are fixedly connected to the inner side wall of the annular plate 7 in a left-right symmetrical manner, and the connecting pipe 2 and the butt pipe 3 abut against the annular sealing pads 8. The annular sealing pads 8 and the annular plate 7 are hollow.

[0025] Among them, the scheme sets the annular plate 7 and the annular sealing pad 8 between the connecting pipe 2 and the butt pipe 3, compared with the traditional form of bonding rubber pad between the flanges, the scheme utilizes the T-shaped structure of the annular plate 7 cross section, which can further strengthen the contact surface with the two side pipes, and the hollow cavity of the annular sealing pad 8 is arranged, when the connecting pipe 2 and the butt pipe 3 are subjected to greater tension, the annular sealing pad 8 is subjected to greater pressure, the cavity space is smaller, and the resilience of the annular sealing pad 8 is greater. Even if the pipeline encounters a small degree of displacement between the connecting pipe 2 and the butt pipe 3 during use, the resilience of the annular sealing pad 8 can quickly fill the gap position, avoiding the phenomenon of leakage, in addition, the annular sealing pad 8 is in a closed environment, and has a longer service life.

[0026] As Figure 2 and Figure 3 shown, the tensioning assembly comprises a fixed plate 4 fixedly connected to the side walls of the connecting pipe 2 and the butt pipe 3, the fixed plate 4 is annular, a plurality of through holes are formed in the side wall of the fixed plate 4, and one screw rod 5 is arranged between two through holes located on the same axis. The side wall of the screw rod 5 is threadedly connected with a nut 6.

[0027] The side walls of the connecting pipe 2 and the butt pipe 3 are fixedly connected with a limiting block 9, and the fixed plate 4 abuts against the limiting block 9.

[0028] Specifically, the connection mode between the fixed plate 4 and the connecting pipe 2 and the butt pipe 3 has two kinds, one is that the fixed plate 4 is directly welded on the surface of the connecting pipe 2 and the butt pipe 3, at this time, the limiting block 9 serves as a positioning function; the other is that the limiting block 9 and the fixed plate 4 are integrated, the contact surface between the limiting block 9 and the connecting pipe 2 and the butt pipe 3 is a welding point, and the limiting block 9 is fixed by welding, which is selected according to actual needs. In addition, the screw rod 5 and the nut 6 cooperate to form a tensioning bolt structure, which is distributed in an annular and equidistant manner, so that the stress between the connecting pipe 2 and the butt pipe 3 is more uniform.

[0029] As Figure 1 and Figure 2 shown, a protective sleeve 10 is arranged between the connecting pipe 2 and the butt pipe 3, the protective sleeve 10 is sleeved with a clamp 11, and the clamp 11 is tightly fastened on the connecting pipe 2 and the butt pipe 3.

[0030] The protective sleeve 10 is made of rubber, plastic or other materials, has certain elasticity or tensile property, can fully cover the outside of the screw rod 5, and after the clamps 11 are tightened, a sealed space is formed inside the protective sleeve 10, thereby sealing and protecting the screw rod 5 and the annular sealing gasket 8.

[0031] The working principle of the utility model is as follows: when the connecting pipe 2 and the butt joint pipe 3 need to be assembled, the protective sleeve 10 and the clamp 11 are first sleeved on the butt joint pipe 3, then the valve body 1 is aligned with the butt joint pipe 3, the annular plate 7 is placed between the connecting pipe 2 and the butt joint pipe 3, then the screw rod 5 is passed through the through holes in the two side fixed plates 4, the two side nuts 6 are tightened, the screw rod 5 forms a pulling force between the connecting pipe 2 and the butt joint pipe 3, the end faces of the connecting pipe 2 and the butt joint pipe 3 are in contact with the annular sealing gasket 8, with the tightening of the screw rod 5, the cavity of the annular sealing gasket 8 is gradually compressed, and the sealing operation between the connecting pipe 2 and the butt joint pipe 3 is realized.

[0032] Then the protective sleeve 10 is pulled out and sleeved outside the screw rod 5, and the two side clamps 11 are tightened on the connecting pipe 2 and the butt joint pipe 3 respectively, so that the screw rod 5 and the annular plate 7 are both in a sealed environment, which can effectively prolong the service life.

[0033] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the utility model, some improvements and refinements can be made, which should also be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A bi-directional seal ball valve characterized by: The utility model relates to a valve body (1) and butt joint pipe (3) are connected, the both ends of valve body (1) are fixedly connected with connecting pipe (2) respectively, and the sealing assembly is arranged between connecting pipe (2) and butt joint pipe (3), and the tensioning assembly is also arranged between connecting pipe (2) and butt joint pipe (3).

2. A bi-directional seal ball valve according to claim 1, wherein: The sealing assembly includes an annular plate (7) arranged between the connecting pipe (2) and the butt joint pipe (3), the annular plate (7) is T-shaped, two annular sealing gaskets (8) are symmetrically fixedly connected to the inner side wall of the annular plate (7), and the connecting pipe (2) and the butt joint pipe (3) are in abutment with the annular sealing gaskets (8).

3. A bi-directional seal ball valve according to claim 1, wherein: The tensioning assembly includes a fixing plate (4) fixedly connected to the side walls of the connecting pipe (2) and the butt joint pipe (3), the fixing plate (4) is annular, a plurality of through holes are formed in the side wall of the fixing plate (4), one screw rod (5) is arranged between two through holes located on the same axis, and a nut (6) is threadedly connected to the side wall of the screw rod (5).

4. A bi-directional seal ball valve according to claim 3, wherein: The connecting pipe (2) and the butt joint pipe (3) are fixedly connected with limit blocks (9) on the side walls, respectively, and the fixing plate (4) is in abutment with the limit blocks (9).

5. A bi-directional seal ball valve according to claim 1, wherein: A protective sleeve (10) is sleeved between the connecting pipe (2) and the butt joint pipe (3), a clamp (11) is sleeved on the protective sleeve (10), and the clamp (11) is fastened on the connecting pipe (2) and the butt joint pipe (3), respectively.

6. A bi-directional seal ball valve according to claim 2, wherein: The annular sealing gaskets (8) and the annular plate (7) are hollow.

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