Ball valve capable of being conveniently connected with pipeline in sealing mode

Abstract

The utility model provides a ball valve capable of being conveniently connected with a pipeline in a sealing mode. The ball valve comprises a valve body, two ends of the valve body are provided with tubular connectors, inner threads are arranged on the inner side walls of the connectors, annular sealing rings are arranged on the inner side walls of the connectors, the sealing rings are located on the inner sides of the inner thread sections of the connectors, and the faces, facing the inner threads, of the sealing rings are sealing faces. The inner side wall of the connector between the sealing ring and the internal thread is provided with a concave annular sealing groove, an annular sealing ring is arranged in the sealing groove, the section of the sealing ring is V-shaped, a water pipe of the sealing ring is in threaded connection with the connectors at the two ends of the ball valve, and after the water pipe is screwed, the water pipe abuts against the sealing ring to form sealing connection. The sealing gasket and the sealing ring are used for assisting in achieving sealing connection, in this way, a raw material belt does not need to be wound on the water pipe, or the raw material belt can be wound at will, the winding requirement for the raw material belt is not high, and on the basis that sealing connection between the ball valve and the water pipe is guaranteed, connection between the water pipe and the ball valve can be conveniently achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a ball valve which is convenient for sealing connection with a pipeline. Background Art

[0002] The ball valve is a common type of valve and has a wide range of applications.

[0003] The main structure of the ball valve includes a ball, a valve stem and a valve body. The ball is usually a circular part with a through hole, and the rotation of the ball is controlled by the rotation of the valve stem to realize the opening and closing of the valve.

[0004] An existing ball valve, as Figure 1 shown, the two ends of its valve body are connected to the pipeline, and the common connection method is threaded connection. In order to ensure sealing, raw tape is wound on the pipeline to assist in sealing. However, the use of raw tape requires the operator to have certain experience. Otherwise, if the raw tape is not wound well, good sealing cannot be achieved. Therefore, the use of raw tape still has a certain degree of difficulty, and moreover, the winding of raw tape needs to be repeated many times, and the operation is also troublesome. Content of the Utility Model

[0005] In view of the problems pointed out in the background art, the utility model provides a ball valve which is convenient for sealing connection with a pipeline to solve the above technical problems.

[0006] The technical solution of the utility model is realized as follows:

[0007] A ball valve which is convenient for sealing connection with a pipeline includes a valve body. Both ends of the valve body are tubular connectors. The inner side wall of the connector is provided with internal threads. The inner side wall of the connector is provided with an annular sealing ring. The inner diameter of the sealing ring is smaller than the inner diameter of the internal thread section of the connector. The sealing ring is located inside the internal thread section of the connector. The surface of the sealing ring facing the internal thread is a sealing surface.

[0008] The utility model is further arranged such that in the axial direction of the connector, the sealing ring and the internal threads are arranged at intervals.

[0009] The utility model is further arranged such that on the inner side wall of the connector between the sealing ring and the internal threads, there is an inwardly concave annular sealing groove. An annular sealing ring is arranged in the sealing groove. The cross section of the sealing ring is V-shaped. The sealing ring is arranged facing the sealing ring.

[0010] The utility model is further arranged such that the sealing groove extends to be flush with the sealing surface.

[0011] The present utility model is further configured such that an annular gasket is provided on the sealing surface, the gasket and the sealing ring are integrally provided, and the gasket and the sealing ring are provided with a connecting ring of two types, and both ends of the connecting ring are respectively connected to the edges of the annular gasket and the sealing ring.

[0012] The present utility model is further configured such that a sphere and a valve seat are provided inside the valve body, the sphere and the valve seat are in sealing cooperation, and a valve rod for driving the sphere to rotate is provided on the valve body.

[0013] The present utility model is further configured such that a water pipe is connected inside the connecting head, an external thread and a connecting groove are provided on the outer side wall of the water pipe, the connecting groove is located between the connecting end of the water pipe and the external thread, the water pipe is threadedly connected to the connecting head, the end of the water pipe abuts against the gasket on the sealing ring for sealing cooperation, the connecting groove and the sealing groove are correspondingly arranged, and the sealing ring is connected in the connecting groove and the sealing groove.

[0014] The present utility model is further configured such that the connecting groove is spaced from the end of the water pipe.

[0015] The present utility model is further configured such that an annular gasket is provided on the sealing surface.

[0016] Adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] For the ball valve provided by the present utility model, which is convenient for sealing connection with a pipeline, the water pipe is threadedly connected to the connecting heads at both ends of the ball valve. When the water pipe is tightened, the water pipe abuts against the sealing ring to form a sealing connection, and then the sealing connection is assisted by the gasket and the sealing ring. In this way, it is not necessary to wind the raw material tape on the water pipe, or the raw material tape can be wound more casually, and the requirement for winding the raw material tape is not high. In this way, on the basis of ensuring the sealing connection between the ball valve and the water pipe, the connection between the water pipe and the ball valve can be realized more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a structural schematic diagram of the prior art.

[0020] Figure 2 It is a structural schematic diagram of the ball valve of the present utility model.

[0021] Figure 3 It is a structural schematic diagram of the connection between the connecting head and the water pipe of the present utility model. Detailed implementation mode

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0023] The following reference Figures 1-3 is made to illustrate the present utility model:

[0024] Embodiment 1: A ball valve that is convenient for sealing connection with a pipeline, including a valve body 1. The two ends of the valve body 1 are tubular connection heads 2. This design of the tubular connection head increases the convenience and stability of docking with a water pipe. An internal thread is provided on the inner side wall of the connection head 2. The presence of the internal thread enables the ball valve to be tightly connected to the water pipe by screwing. An annular sealing ring 3 is provided on the inner side wall of the connection head 2. The inner diameter of the sealing ring 3 is smaller than the inner diameter of the internal thread section of the connection head 2. The sealing ring 3 is located inside the internal thread section of the connection head 2. Such a layout makes it so that when connecting with a water pipe, the end of the water pipe will first contact the sealing ring 3. The surface of the sealing ring 3 facing the internal thread is the sealing surface. When the ball valve is tightly connected to the water pipe, the sealing surface will closely fit the outer wall of the water pipe to form an effective seal and prevent fluid from leaking from the connection.

[0025] Axially in the connection head 2, the sealing ring 3 and the internal thread are arranged at intervals. This interval arrangement has important functions and meanings. First of all, the existence of the interval provides an independent action area for the sealing ring 3, enabling it to fully exert its sealing performance when connecting with a water pipe without being interfered by the internal thread. When the water pipe is screwed into the connection head 2, the sealing ring 3 can evenly bear the pressure from the water pipe without being affected by the thread, thereby achieving a more reliable sealing effect.

[0026] Secondly, the interval arrangement also helps to clearly distinguish the thread connection area and the sealing area during the installation process. Operators can more accurately judge the screwing depth of the water pipe to ensure that while achieving an effective thread connection, the sealing ring 3 is closely attached to the water pipe.

[0027] On the inner side wall of the connector 2 between the sealing ring 3 and the internal thread, there is an inwardly concave annular sealing groove 4. An annular sealing ring 5 is arranged in the sealing groove 4. The cross-section of the sealing ring 5 is V-shaped, and the sealing ring 5 is arranged with an opening facing the sealing ring 3. This design has multiple advantages. The sealing ring 5 with a V-shaped cross-section can generate greater elastic deformation when being extruded, thus providing stronger sealing pressure. When the water pipe is screwed tightly with the connector 2, the sealing ring 5 will be compressed in the sealing groove 4, and its V-shaped structure makes the sealing contact area increase, enhancing the sealing effect.

[0028] The sealing ring 5 facing the sealing ring 3 works in cooperation with the sealing ring 3 to form a double-sealing guarantee. Even under high pressure or in harsh working conditions, it can effectively prevent fluid from leaking from the connection part.

[0029] The sealing groove 4 extends to be flush with the sealing surface, which means the depth of the sealing groove 4 reaches the position where the sealing surface of the sealing ring 3 is located, further enhancing the coherence and integrity of the overall sealing structure. An annular gasket 6 is arranged on the sealing surface. The gasket 6 and the sealing ring 5 are integrally arranged. The gasket 6 and the sealing ring 5 are provided with a connecting ring 7 connecting the two. The two ends of the connecting ring 7 are respectively connected to the edges of the annular gasket 6 and the sealing ring 5. When the ball valve is connected and tightened with the water pipe, the gasket 6 first comes into close contact with the end face of the water pipe, bearing the initial pressure and sealing function. As the pressure increases, if there is a leak in the seal between the gasket 6 and the water pipe, the pressure acts on the sealing ring 5, and the V-shaped sealing ring 5 can open up to form a seal. In this way, the sealing ring 5 forms a sealing fit with the connector and the water pipe.

[0030] When the water pipe 8 is threadedly connected to the connector 2, the end of the water pipe 8 abuts against the gasket 6 on the sealing ring 3 to form a sealing fit, effectively preventing fluid leakage.

[0031] Inside the valve body 1, there is a sphere and a valve seat. The sphere and the valve seat are in sealing fit. A valve stem for driving the sphere to rotate is arranged on the valve body 1.

[0032] A water pipe 8 is connected inside the connector 2. On the outer side wall of the water pipe 8, there are an external thread and a connection groove 9. The external thread is used for threaded connection with the internal thread on the inner side wall of the connector 2 to realize the fixed connection between the water pipe 8 and the ball valve. The connection groove 9 is located between the connection end of the water pipe 8 and the external thread. The connection groove 9 is arranged at an interval from the end of the water pipe 8. The water pipe 8 is threadedly connected to the connector 2, and the end of the water pipe 8 abuts against the gasket 6 on the sealing ring 3 for sealing fit. The connection groove 9 is arranged corresponding to the sealing groove 4. The sealing ring 5 is connected in the connection groove 9 and the sealing groove 4. When the leakage pressure acts on the sealing ring 5, the sealing ring 5 undergoes an opening deformation, and the opened sealing ring 5 closely adheres to the side walls of the connection groove 9 and the sealing groove 4 to form a sealing fit.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A ball valve convenient for sealing connection with a pipeline, comprising a valve body (1), wherein both ends of the valve body (1) are tubular connectors (2), and the inner side wall of the connector (2) is provided with an internal thread, characterized in that: An annular sealing ring (3) is provided on the inner side wall of the connector (2); the inner diameter of the sealing ring (3) is smaller than the inner diameter of the internal thread section of the connector (2); the sealing ring (3) is located on the inner side of the internal thread section of the connector (2); and the surface of the sealing ring (3) facing the internal thread is a sealing surface.

2. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 1, characterized in that: In the axial direction of the connector (2), the sealing ring (3) is spaced apart from the internal thread.

3. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 2, characterized in that: An inwardly concave annular sealing groove (4) is provided on the inner side wall of the connector (2) between the sealing ring (3) and the internal thread, an annular sealing ring (5) is provided in the sealing groove (4), the cross section of the sealing ring (5) is V-shaped, and the sealing ring (5) is arranged toward the sealing ring (3).

4. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 3, characterized in that: The sealing groove (4) extends until it is flush with the sealing surface.

5. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 4, characterized in that: An annular sealing gasket (6) is provided on the sealing surface. The sealing gasket (6) and the sealing ring (5) are integrally arranged. The sealing gasket (6) and the sealing ring (5) are provided with a connecting ring (7) connecting the two. The two ends of the connecting ring (7) are respectively connected to the edges of the annular sealing gasket (6) and the sealing ring (5).

6. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 1, characterized in that: A ball and a valve seat are arranged in the valve body (1), the ball and the valve seat are sealed together, and a valve stem for driving the ball to rotate is arranged on the valve body (1).

7. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 5, characterized in that: The connector (2) is internally connected to a water pipe (8), and an outer wall of the water pipe (8) is provided with an external thread and a connecting groove (9), the connecting groove (9) being located between the connecting end of the water pipe (8) and the external thread, the water pipe (8) is threadedly connected to the connector (2), the end of the water pipe (8) is abutted against and sealed against a sealing gasket (6) on a sealing ring (3), the connecting groove (9) and the sealing groove (4) are arranged correspondingly, and the sealing ring (5) is connected to the connecting groove (9) and the sealing groove (4).

8. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 7, characterized in that: The connecting groove (9) is spaced apart from the end of the water pipe (8).

9. A ball valve conveniently connected to a pipeline in a sealed manner according to claim 1, characterized in that: An annular sealing gasket (6) is provided on the sealing surface.

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