Ball valve

Abstract

The utility model discloses a ball valve which comprises a valve seat, a ball body arranged in the valve seat in a rotating mode and a valve rod fixedly connected with the ball body, one end of the valve rod penetrates through the valve seat and extends out of the outer surface of the valve seat, a supporting ring is fixed to the section, located on the outer surface of the valve seat, of the valve rod, and the bottom of the supporting ring abuts against the outer surface of the valve seat. By means of the mode of arranging the supporting ring, in the process that the handle is installed on the valve rod, external force borne by the valve rod can be transmitted to the valve seat, the ball body cannot be affected, on one hand, looseness of the ball body relative to the valve seat is reduced, on the other hand, the sealing effect can be improved, and water cannot directly seep from the connecting position of the valve seat and the valve rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of valves, in particular to a ball valve. BACKGROUND

[0002] Ball valve is a kind of valve that uses a hollow rotating ball to control the flow of medium. Its main function is to start, stop or regulate the flow of medium (usually water, air or gas).

[0003] Ball valve generally includes a ball, a valve stem and a valve seat for wrapping the ball, in order to facilitate the rotation of the ball, a handle is often installed on the ball. After the ball valve is prepared, the handle is installed on the valve stem, basically in order to prevent the handle from being separated from the valve stem, the handle and the valve stem are connected by interference fit, and the handle is connected to the valve stem by applying external force to the handle by a hammer or the like.

[0004] However, the way of applying external force to the handle to connect the handle and the valve stem often has a downward external force on the valve stem, which is easy to loosen the ball at the lower part of the valve stem relative to the valve seat under the influence of external force, which reduces the sealing effect and the quality of the product. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned deficiencies of the prior art, and to provide a ball valve which can reduce the problem of loosening of the valve ball relative to the valve seat under the influence of external force during the process of installing the handle to the valve stem.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A ball valve, comprising a valve seat, a ball rotatably arranged in the valve seat and a valve stem fixedly connected with the ball, one end of the valve stem penetrates through the valve seat and extends out of the outer surface of the valve seat, one end of the valve stem located on the outer surface of the valve seat is fixedly provided with a support ring, and the bottom of the support ring abuts against the outer surface of the valve seat.

[0008] Preferably, the valve stem is provided with an annular groove, and a sealing ring is arranged on the annular groove.

[0009] Preferably, the annular groove is located on the side of the support ring facing the valve seat, and the sealing ring is located between the support ring and the valve seat.

[0010] Preferably, the valve seat comprises a first seat and a second seat respectively sleeved on the ball, and the first seat and the second seat are detachably connected.

[0011] Preferably, the first seat is provided with a protruding buckle, and the second seat is provided with a clamping groove matched with the protruding buckle.

[0012] Preferably, the valve seat is sleeved with a valve body, and the valve body is integrally formed.

[0013] Preferably, the cross section of the support ring is rectangular.

[0014] Preferably, the cross section of the support ring is semicircular.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] By setting the support ring, the external force received by the valve rod during the process of installing the handle to the valve rod is transmitted to the valve seat, without affecting the ball, on the one hand, reducing the looseness of the ball relative to the valve seat, on the other hand, the sealing effect can be improved, so that water cannot directly seep out from the connection between the valve seat and the valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the utility model.

[0018] Figure 2 is the explosion structure schematic diagram of the utility model Figure 1 .

[0019] Figure 3 is the explosion structure schematic diagram of the utility model Figure 2 .

[0020] Figure 4 is the cross section structure schematic diagram of the utility model.

[0021] Figure 5 is Figure 4 the enlarged structure schematic diagram of A in the figure.

[0022] The reference signs are explained as follows: 1, valve seat; 11, ball; 12, valve rod; 13, support ring; 14, ring groove; 15, sealing ring; 16, first seat; 17, second seat; 2, valve body; 3, handle. DETAILED DESCRIPTION

[0023] In the present specification, the orientation terms such as up, down, left, right, front, back, front face, back face, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the configuration shown in the drawings, and they are relative concepts, so it is possible that they will change accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third" or the like or similar expressions are only used for description and differentiation purposes, and cannot be understood as indicating or implying the relative importance of the corresponding members.

[0024] The following will be described in detail in combination with the Figure 1 - the Figure 5 application is further described in detail.

[0025] The application discloses a ball valve, which comprises a ball body 11, a valve seat 1 and a valve body 2, the ball body 11 is rotationally arranged in the valve seat 1, the valve seat 1 comprises a first seat 16 and a second seat 17 which are respectively sleeved on the ball body 11, and the first seat 16 and the second seat 17 are detachably connected.

[0026] The ball body 11 is further fixedly provided with a valve rod 12, the lower end of the valve rod 12 is fixedly connected with the ball body 11, the upper end of the valve rod 12 penetrates through the valve seat 1 and the valve body 2 and is exposed to the outer surface of the valve body 2, the end of the valve rod 12 exposed to the valve body 2 is connected with a handle 3, and the valve rod 12 can be rotated by rotating the handle 3 so as to drive the ball body 11 to rotate.

[0027] One end of the valve rod 12 located at the outer surface of the valve seat 1 is fixedly provided with a supporting ring 13, and the cross section of the supporting ring 13 is semicircular in the application. In other embodiments, the cross section of the supporting ring 13 can also be rectangular. The bottom of the supporting ring 13 abuts against the outer surface of the valve seat 1. When an external force is used to install the handle 3 on the valve rod 12, the valve rod 12 will be subjected to a downward force, at this time, the supporting ring 13 will be supported on the valve seat 1, and the external force borne by the valve rod 12 will be transmitted to the valve seat 1 through the supporting ring 13, so that the influence on the ball body 11 is reduced. The existence of the supporting ring 13 can also delay the leakage of water

[0028] Further, the valve rod 12 is provided with a ring groove 14, the ring groove 14 is located at the side of the supporting ring 13 facing the valve seat 1, a sealing ring 15 is arranged on the ring groove 14, the sealing ring 15 is located between the supporting ring 13 and the valve seat 1, the supporting ring 13 can press the sealing ring 15 to abut against the connecting position of the valve seat 1 and the valve rod 12, and the sealing effect can be further improved by using the supporting ring 13 and the sealing ring 15.

[0029] The valve body 2 is integrally formed on the outer surface of the valve seat 1 by injection molding, the supporting ring 13 can be well attached to the valve body 2, and the valve body 2 can abut against the supporting ring 13 to limit the upward movement of the valve rod 12.

[0030] The above are preferred embodiments of the application, and the protection scope of the application is not limited thereto; therefore, according to the technical scheme of the application, a person skilled in the art can propose multiple structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the application. Therefore, the above specific embodiments and the drawings are only exemplarily used to describe the technical scheme of the application, and should not be regarded as the whole of the application or regarded as the limitation or restriction of the technical scheme of the application. Therefore, equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A ball valve comprising a valve seat (1), a ball (11) rotatably arranged in the valve seat (1), and a valve stem (12) fixedly connected with the ball (11), one end of the valve stem (12) penetrating through the valve seat (1) and extending out of the outer surface of the valve seat (1), characterized in that: The valve rod (12) is fixed with a supporting ring (13) at one end of the outer surface of the valve seat (1), and the bottom of the supporting ring (13) abuts against the outer surface of the valve seat (1).

2. A ball valve as claimed in claim 1, characterised in that: The valve rod (12) is provided with a ring groove (14), and the ring groove (14) is provided with a sealing ring (15).

3. A ball valve as claimed in claim 2, characterised in that: The ring groove (14) is located on the side of the supporting ring (13) facing the valve seat (1), and the sealing ring (15) is located between the supporting ring (13) and the valve seat (1).

4. A ball valve as claimed in claim 1, characterized in that: The valve seat (1) comprises a first seat (16) and a second seat (17) respectively sleeved on the ball (11), and the first seat (16) and the second seat (17) are detachably connected.

5. A ball valve as claimed in claim 4, characterised in that: The first seat (16) has a protruding buckle, and the second seat (17) has a clamping groove matched with the protruding buckle.

6. A ball valve as claimed in claim 1, characterized in that: The valve seat (1) is sleeved with a valve body (2), and the valve body (2) is integrally formed.

7. A ball valve as claimed in claim 1, characterized in that: The cross section of the supporting ring (13) is rectangular.

8. A ball valve as claimed in claim 1, characterized in that: The cross section of the supporting ring (13) is semicircular.

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