Valve joint and ball valve

Abstract

The utility model discloses a valve joint which is tubular and comprises a valve seat part for limiting a valve seat and a wrench opening section for screwing, the wrench opening section comprises a wrench opening part, a wrench opening surface is formed on the outer wall of the wrench opening part, an adaptive surface corresponding to the wrench opening surface is formed on the inner wall of the wrench opening part, and the adaptive surface is matched with the wrench opening surface. And the shape of the adaptive surface is the same as that of the wrench opening surface. The utility model further discloses the ball valve with the valve connector. The valve joint disclosed by the utility model can be produced by adopting a water expansion process, so that the production period is shortened, the production cost is reduced, and the corresponding ball valve is high in structural reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve joint of a ball valve and a corresponding ball valve. Background Art

[0002] As Figure 1 Shown is the structure of an existing two-piece ball valve, which includes a valve body 1', a valve joint 2', a valve seat 3', a valve ball 4', a valve stem 5' and a handle 6'. Among them, the valve joint 2' is produced by precision casting process. The valve joint 2' is fixedly connected to the valve body 1', and the internal space formed after their cooperation forms a valve cavity. The valve ball 4' is installed in the valve cavity, and the left and right ends of the valve ball 4' are respectively in sealing cooperation with two valve seats 3'. One end of the valve stem 5' is connected to the valve ball 4', and the other end of the valve stem 5' is connected to the handle 6'. It can be seen from the figure that internal threads 11' are provided at the inlet / outlet of the valve body 1' for convenient connection with pipelines, and a wrench structure is formed on the outer wall at the inlet / outlet. During use, the valve ball 4' is rotated by rotating the handle 6' to realize the opening / closing of the ball valve.

[0003] For existing stainless steel ball valve joints produced by precision casting process, most of them adopt the above structural form. The stainless steel valve joints produced by precision casting process have problems such as long production cycle, high mass production difficulty and high cost. Summary of the Utility Model

[0004] The utility model provides a valve joint and a ball valve, aiming to overcome the problems such as long cycle and high cost existing in the products of the existing stainless steel precision casting process.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A valve joint, which is tubular, includes a valve seat part for limiting the valve seat and a wrench section for screwing. The wrench section includes a wrench part. The outer wall of the wrench part forms a wrench surface, and the inner wall of the wrench part forms an adaptation surface corresponding to the wrench surface, and the shape of the adaptation surface is the same as that of the wrench surface.

[0007] In a recommended embodiment, the radial cross-sections of the wrench surface and the adaptation surface are both polygons. Generally, they are regular polygons, which have good structural stability.

[0008] In a recommended embodiment, the radial cross-sections of the wrench surface and the adaptation surface are both regular hexagons. This kind of "honeycomb" structure has excellent geometric mechanical properties and is the best topological structure for covering a two-dimensional plane.

[0009] In a recommended embodiment, the valve seat part is a radial retaining ring. It is used to prevent the axial displacement of the valve core.

[0010] In a recommended embodiment, the valve joint further includes a first connection section for connecting to a pipeline. The first connection section is located beside the wrench section and in the axial extension direction of the wrench section. The wrench section is located beside the first connection section, that is, the inner / outer wall of the wrench section is not turned with threads, so as to ensure the structural strength of the wrench section and the reliability of the valve joint.

[0011] In a recommended embodiment, the first connection section is provided with internal threads or external threads. The first connection section adopts a threaded structure, and this connection method has high reliability.

[0012] Further, the valve joint further includes a second connection section for connecting to a valve body. One end of the second connection section is connected to the valve seat portion. The second connection section is usually connected to the valve body by a threaded method.

[0013] Further, the valve joint further includes a reduced-diameter section, which is located between the valve seat portion and the wrench section. One end of the valve seat portion is connected to the reduced-diameter section, and the other end of the valve seat portion is connected to the second connection section. The setting of the reduced-diameter section can increase the structural strength on the one hand and is also easier for hydroforming on the other hand.

[0014] Further, the valve joint further includes a limiting portion for limiting, which is located between the reduced-diameter section and the wrench section. During use, the limiting portion abuts against the port of the valve body to ensure accurate positioning during assembly.

[0015] Still further, the valve joint is of an integral structure, which includes a first connection section, a wrench section, a limiting portion, a reduced-diameter section, a valve seat portion, and a second connection section that are connected in sequence. This structure is a preferred method, which is not only beneficial to hydroforming but also has high structural reliability.

[0016] Even further, the wall thicknesses of the first connection section, the wrench section, the limiting portion, the reduced-diameter section, the valve seat portion, and the second connection section are the same. The same wall thickness is more conducive to improving the structural reliability.

[0017] A ball valve includes the above-mentioned valve joint.

[0018] Advantages of the present utility model:

[0019] The valve joint of the present utility model can be produced by a hydroforming process, which not only shortens the production cycle and reduces the production cost, but also the corresponding ball valve has high structural reliability. Description of the drawings

[0020] Figure 1 It is a cross-sectional view of an existing ball valve.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the valve joint of Embodiment 1.

[0022] Figure 3 Schematic cross-sectional structure diagram of the valve joint in the first embodiment.

[0023] Figure 4 For Figure 3 Enlarged structure diagram of part A in

[0024] Figure 5 Schematic cross-sectional structure diagram of the ball valve in the first embodiment.

[0025] Figure 6 Schematic cross-sectional structure diagram of the ball valve in the second embodiment.

[0026] Figure 7 Schematic cross-sectional structure diagram of the valve joint in the third embodiment. Specific implementation manners

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "on the top" of the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning. Embodiment

[0031] Referring to Figure 2 , as a preferred embodiment, the valve joint 100 of this embodiment has an integral structure. It includes, from left to right, a first connection section 1, a wrench section 2, a limiting section 3, a reduced-diameter section 4, a valve seat section 5, and a second connection section 6 that are connected in sequence.

[0032] The first connection section 1 is used to connect to a pipeline (not shown in the figure), and it is provided with internal threads therein.

[0033] At the same time, referring to Figure 3 and Figure 4 , the limiting section 3 includes an axial section 31 and a radial section 32 that are connected to each other. In this embodiment, the axial section 31 has the maximum outer diameter of the valve joint 100. One end of the above-mentioned radial section 32 is connected to the axial section 31, and the other end of the radial section 32 extends towards the central axis direction of the axial section 31, that is, towards the direction of diameter reduction. The diameter of the axial section 31 is usually greater than or equal to the outer diameter of the valve body. During installation, the radial section 32 abuts against the port of the valve body to ensure accurate positioning during assembly.

[0034] The wrench section 2 is used for screwing. It is located beside the first connection section 1 and in the axial extension direction of the first connection section 1. In this embodiment, the wrench section 2 includes a wrench portion 21, a first connection portion 22, and a second connection portion 23. The outer wall of the wrench portion 21 forms a wrench surface 211, and the inner wall of the wrench portion 21 forms an adaptation surface 212 corresponding to the wrench surface 211. The adaptation surface 212 has the same shape as the wrench surface 211, that is, the wrench surface 211 and the adaptation surface 212 mutually form similar figures. Whatever shape the wrench surface 211 is, the corresponding adaptation surface 212 is also a similar shape, except that the sizes of the two are different, and the adaptation surface 212 is slightly smaller than the wrench surface 211. In this embodiment, the radial cross-sections of the wrench surface 211 and the adaptation surface 212 are both regular octagons. (Its radial cross-section is not limited to a regular octagon, and it can also be a quadrilateral, a hexagon, etc., which can be set according to actual needs).

[0035] The first connecting portion 22 and the second connecting portion 23 are both frustum-shaped. Among them, the large-diameter end of the first connecting portion 22 is connected to one end of the wrench opening portion 21, and the small-diameter end of the first connecting portion 22 is connected to the first connecting section 1; the large-diameter end of the second connecting portion 23 is connected to the axial section 31 of the limiting portion 3, and the small-diameter end of the second connecting portion 23 is connected to the other end of the wrench opening portion 21.

[0036] The valve seat portion 5 is generally a radially extending radial retaining ring, which is circular ring-shaped and can be used to prevent the axial displacement of the valve ball (core).

[0037] Meanwhile, referring to Figure 5 , both the reduced-diameter section 4 and the second connecting section 6 extend along the axial direction of the valve joint 100. An external thread is provided on the second connecting section 6 for threaded connection with the valve body 71. The outer diameter of the reduced-diameter section 4 is smaller than the outer diameter of the second connecting section 6. In this embodiment, the large-diameter end of the valve seat portion 5 is connected to the second connecting section 6, and the small-diameter end of the valve seat portion 5 is connected to the right end of the reduced-diameter section 4; the left end of the reduced-diameter section 4 is connected to the other end (small-diameter end) of the radial section 32, so as to form an annular groove between the limiting portion 3 and the second connecting section 6 ( Figure 2 not marked in the figure).

[0038] A ball valve includes the above-mentioned valve joint 100, and further includes a valve body 71, a valve ball 72, a valve seat 73, a valve rod 74, a convex neck 75 and a handle 76. In this embodiment, the second connecting section 6 of the valve joint 100 extends into the valve body 71 and is threadedly connected to the valve body 71. The valve joint 100 and the valve body 71 cooperate to form a valve cavity. The valve ball 72 is installed in the valve cavity, and valve seats 73 are respectively arranged on both sides of the valve ball 72 for sealing cooperation with the valve ball 72. Among them, the left valve seat 73 is axially limited by the valve seat portion 5. The convex neck 75 is fixedly connected to the valve body 71. The valve rod 74 passes through the convex neck 75, and one end of the valve rod 74 is synchronously rotatably connected to the valve ball 72, and the other end of the valve rod 74 is fixedly connected to the handle 76. Embodiment

[0039] Referring to Figure 6 , the structure of the ball valve in the second embodiment is basically the same as that of the ball valve in the first embodiment. The main difference is that in the ball valve of the second embodiment, the valve body 71' is a straight pipe, and the ball valve further includes valve joints 100 symmetrically arranged on the left and right sides of the valve body 71'. Embodiment

[0040] Referring to Figure 7 , the structure of the third embodiment is basically the same as that of the first embodiment. The main difference is that the third embodiment omits the limiting portion in the first embodiment, that is, one end of the reduced-diameter section 4” is directly connected to the wrench section 2”, and the other end of the reduced-diameter section 4” is connected to the valve seat portion 5”. Although the structure of this embodiment is simpler, there is a problem of difficult positioning when assembling with the valve body.

[0041] Obviously, the above-mentioned embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A valve joint (100), which is tubular and includes a valve seat portion (5) for limiting a valve seat and a wrench section (2) for screwing. The wrench section (2) includes a wrench portion (21), and an outer wall of the wrench portion (21) forms a wrench surface (211). It is characterized in that: The inner wall of the spanner opening part (21) forms an adaptation surface (212) corresponding to the spanner opening surface, and the shape of the adaptation surface (212) is the same as that of the spanner opening surface (211).

2. The valve joint according to claim 1, characterized in that: The radial cross-sections of the spanner opening surface (211) and the adaptation surface (212) are both polygons.

3. The valve joint according to claim 2, characterized in that: The radial cross-sections of the spanner opening surface (211) and the adaptation surface (212) are both regular hexagons.

4. The valve joint according to claim 1, characterized in that: The valve seat part (5) is a radial retaining ring.

5. The valve joint according to claim 1, characterized in that: The valve joint (100) further includes a first connection section (1) for connecting with a pipeline. The first connection section (1) is located beside the spanner opening section (2) and in the axial extension direction of the spanner opening section (2).

6. The valve joint according to claim 5, characterized in that: The first connection section (1) is provided with internal threads or external threads.

7. The valve joint according to claim 5, characterized in that: The valve joint (100) further includes a second connection section (6) for connecting with a valve body (71). One end of the second connection section (6) is connected to the valve seat part (5).

8. The valve joint according to claim 7, characterized in that: The valve joint (100) further includes a reduced-diameter section (4). The reduced-diameter section (4) is located between the valve seat part (5) and the spanner opening section (2). One end of the valve seat part (5) is connected to the reduced-diameter section (4), and the other end of the valve seat part (5) is connected to the second connection section (6).

9. The valve joint according to claim 8, characterized in that: The valve joint (100) further includes a limiting part (3) for limiting. The limiting part (3) is located between the reduced-diameter section (4) and the spanner opening section (2).

10. The valve joint according to claim 9, characterized in that: The valve joint (100) is of an integral structure, and it includes a first connection section (1), a spanner opening section (2), a limiting part (3), a reduced-diameter section (4), a valve seat part (5), and a second connection section (6) connected in sequence.

11. The valve joint according to claim 10, characterized in that: The wall thicknesses of the first connection section (1), the spanner opening section (2), the limiting part (3), the reduced-diameter section (4), the valve seat part (5), and the second connection section (6) are the same.

12. A ball valve, characterized in that: Including the valve joint (100) according to any one of claims 1-11.

Images