Valve body and ball valve

Abstract

The valve body comprises a connecting section used for being connected with a pipeline and a main cavity section used for installing a valve element, the main cavity section is connected with the connecting section, a wrench opening section used for screwing is arranged on the connecting section or the main cavity section, the wrench opening section comprises a wrench opening part, a wrench opening face is formed on the outer wall of the wrench opening part, and the valve element is arranged on the wrench opening face. An adaptive surface corresponding to the wrench opening surface is formed on the inner wall of the wrench opening part, and the shape of the adaptive surface is the same as that of the wrench opening surface. The utility model further discloses a ball valve with the valve body structure, the valve body can be produced by adopting a water expansion process, 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 body of a ball valve and a ball valve with the valve body. 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 cover 2', a valve seat 3', a valve ball 4', a valve stem 5' and a handle 6'. The valve body 1' is usually manufactured by precision casting. The valve cover 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 achieve the opening / closing of the ball valve.

[0003] The valve bodies of existing stainless steel ball valves mostly adopt the above structural form through precision casting. The stainless steel valve bodies produced by precision casting 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 body and a ball valve, aiming to overcome the problems of long cycle and high cost existing in products of existing stainless steel precision casting processes.

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

[0006] A valve body, which is tubular, includes a connection section for connecting with a pipeline and a main chamber section for installing a valve core. The main chamber section and the connection section are connected to each other. A wrench section for screwing is provided on the connection section or the main chamber section. 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. 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] Furthermore, 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 connection section and the main chamber section are of an integral structure.

[0010] In a recommended embodiment, the wall thickness of the connecting section and the main chamber section is the same. The same wall thickness is conducive to improving structural reliability.

[0011] In a recommended embodiment, the flap section is arranged on the connecting section, and the connecting section further comprises an external connecting section, which is located beside the flap section and in the axial extension direction of the flap section. The flap section is located beside the external connecting section, that is, the inner / outer wall of the flap section is not threaded, thereby ensuring the structural strength of the flap section and the reliability of the valve body.

[0012] In a recommended embodiment, the main chamber section forms a constricted structure at the connection with the connecting section, and a valve seat groove for installing a valve seat is formed in the constricted structure. This structure is suitable for a ball valve.

[0013] In a recommended implementation, the external connection section is a threaded section. The external connection section is the part that is actually connected to the pipeline, and usually adopts a threaded structure.

[0014] In a recommended embodiment, the outer diameter of the wrench opening section is larger than the outer diameter of the external connection section. During disassembly and assembly, the wrench is convenient for contacting with the wrench opening section to avoid interference.

[0015] In a recommended embodiment, the connecting section also includes a connecting section, the two ends of which are respectively connected to the flap section and the main chamber section, and the other end of the flap section is connected to the external section, and the flap section protrudes outward. As a preferred embodiment, the flap section protrudes from the connecting section and the external section. This structural design creates a "reduced diameter" effect between the connecting section and the main chamber section, ensuring that the diameters of the connecting section and the main chamber section are close, which is more conducive to water swelling forming.

[0016] In the recommended implementation, the wrench mouth section further includes a first truncated cone portion and a second truncated cone portion, wherein the large diameter end of the first truncated cone portion is connected to one end of the wrench mouth portion, and the small diameter end of the first truncated cone portion is connected to the external section; the large diameter end of the second truncated cone portion is connected to the other end of the wrench mouth portion, and the small diameter end of the second truncated cone portion is connected to the connecting section. In other words, the axial cross-section of the wrench mouth section is roughly trapezoidal, and the trapezoidal structure can further enhance the structural strength of the wrench mouth section, and is also more conducive to water swelling forming.

[0017] A ball valve comprises the valve body mentioned above.

[0018] Beneficial effects of the utility model:

[0019] The valve body of the utility model can be produced by adopting a water swelling process, which not only shortens the production cycle and reduces the production cost, but also the corresponding ball valve has high structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic three-dimensional structure diagram of the valve body of the first embodiment.

[0022] Figure 3 It is a schematic cross-sectional structure diagram of the valve body of the first embodiment.

[0023] Figure 4 It is Figure 3 An enlarged structure diagram of part B in

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the ball valve of the first embodiment.

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the valve body of the second embodiment.

[0026] Figure 7 It is a schematic cross-sectional structure diagram of the valve body of the third embodiment.

[0027] Figure 8 It is a schematic cross-sectional structure diagram of the valve body of the fourth embodiment. Detailed implementation manners

[0028] The following further elaborates on the present utility model in conjunction with 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 parts related to the present utility model rather than all structures are shown in the drawings.

[0029] In the description of the present utility model, unless otherwise clearly specified 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 components or the interaction relationship between two components. 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 circumstances.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0031] 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, and 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, and thus 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

[0032] Refer to Figure 2 , valve body 1, which is usually made of stainless steel and includes a connection section 2 for connecting to the pipeline and a main chamber section 3 for installing the valve ball, and the main chamber section 3 and the connection section 2 are connected to each other.

[0033] The connection section 2 includes an external connection section 21 (the part actually connected to the pipeline, which is a threaded section in this embodiment and can be internal / external threads or other connection methods with the pipeline), a wrench section 22 for screwing, and a connecting section 23. The two ends of the wrench section 22 are respectively connected to the external connection section 21 and the connecting section 23, and the wrench section 22 protrudes outward from the inside. The other end of the external connection section 21 forms a free end, and the other end of the connecting section 23 is connected to the main chamber section 3.

[0034] Also refer to Figure 3 and Figure 4 , the valve body 1 in this embodiment is formed by a steel pipe ( Figure 3 the A pipe shown in

[0035] The main chamber section 3 forms a reduced-diameter necking structure 31 at the connection with the connecting section 2, and a valve seat groove 310 for installing a valve seat is formed within the necking structure 31 (in this embodiment, the valve seat groove is circular); the other end of the main chamber section 3 is provided with an internal thread, and a side hole 30 is provided on the main chamber section 3.

[0036] Continue to refer to Figure 3 , the wrench section 22 includes a wrench portion 221, the outer wall of the wrench portion 221 forms a wrench surface 2211, the inner wall of the wrench portion 221 forms an adaptation surface 2212 corresponding to the wrench surface 2211 one by one, the shapes of the wrench surface 2211 and the adaptation surface 2212 are the same, that is, the wrench surface 2211 and the adaptation surface 2212 form similar figures with each other. Whatever shape the wrench surface 2211 is, the adaptation surface 2212 is also a similar shape, except that the adaptation surface 2212 is slightly smaller than the wrench surface 2211. In this embodiment, the radial cross-sections of the wrench surface 2211 and the adaptation surface 2212 are both regular octagons. (Its radial cross-section is not limited to a regular octagon, and can also be a quadrilateral, a hexagon, etc., which can be set according to actual needs).

[0037] To further strengthen the structural strength of the wrench section 22, the axial section of the wrench section 22 is trapezoidal. Specifically, the wrench section 22 further includes a first frustum portion 222 and a second frustum portion 223. The large-diameter end of the first frustum portion 222 is connected to one end of the wrench portion 221, and the small-diameter end of the first frustum portion 222 is connected to the external connection section 21; the large-diameter end of the second frustum portion 223 is connected to the other end of the wrench portion 221, and the small-diameter end of the second frustum portion 223 is connected to the connection section 23.

[0038] At the same time, refer to Figure 5 , a ball valve, the ball valve includes a valve body 1, a valve cover 4, a boss 5, a valve stem 6, a valve seat 7, a valve ball 8, and a handle 9.

[0039] The ball valve of this embodiment is of a two-piece structure. The valve cover 4 is threadedly connected to the main chamber section 3, and the internal space formed after their cooperation forms a valve chamber. The valve ball 8 is installed in the valve chamber, and the left and right ends of the valve ball 8 are respectively in sealing cooperation with two valve seats 7. It can be seen from the figure that one of the valve seats 7 is installed in the valve seat groove 310 of the necking structure, and the other valve seat 7 is installed in the valve seat groove (not marked in the figure) of the valve cover.

[0040] The boss 5 is welded to the side hole 30, the valve stem 6 passes through the boss 5, and one end of the valve stem 6 is connected to the valve ball 8, and the other end of the valve stem 6 is connected to the handle 9. During use, the rotation of the handle 9 controls the rotation of the valve ball 8 to achieve the opening / closing of the ball valve. Embodiment

[0041] Refer to Figure 6, the structure of the second embodiment is basically the same as that of the first embodiment above. The main difference is that the connecting section 200 of this embodiment only includes an external connection section 201 and a wrench section 202. The outer diameter of the wrench section 202 is larger than that of the external connection section 201. The two ends of the wrench section 202 are respectively connected to the external connection section 201 and the main chamber section 300. It can be seen from the figure that the outer diameter of the valve body 100 gradually decreases from right to left, and the difference between its minimum diameter and maximum diameter is relatively large. Therefore, it is not easy to perform hydroforming. Embodiment

[0042] Refer to Figure 7 , the structure of the third embodiment is basically the same as that of the second embodiment above. The main difference is that the outer diameter of the wrench section 202' of this embodiment is smaller than that of the external connection section 201'. The wrench is easily interfered during the screwing process. Embodiment

[0043] Refer to Figure 8 , the fourth embodiment has a large difference from the above embodiments. The main difference is that the wrench section 22' in this embodiment is arranged in the main chamber section 3'. During use, a special-shaped valve seat (not shown in the figure) adapted to the structure of the wrench section 22' is installed in the wrench section 22'.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. 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 invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A valve body, which is tubular, and comprises a connection section (2) for connecting with a pipeline and a main chamber section (3) for installing a valve core. The main chamber section (3) and the connection section (2) are connected to each other. A wrench section (22) for screwing is provided on the connection section (2) or the main chamber section (3). The wrench section (22) includes a wrench portion (221), and an outer wall of the wrench portion (221) forms a wrench surface (2211), and is characterized in that: The inner wall of the wrench opening part (221) forms an adapting surface (2212) corresponding to the wrench opening surface (2211), and the shape of the adapting surface (2212) is the same as that of the wrench opening surface (2211).

2. The valve body according to claim 1, wherein: The radial cross-sections of the wrench opening surface (2211) and the adapting surface (2212) are both polygons.

3. The valve body according to claim 2, wherein: The radial cross-sections of the wrench opening surface (2211) and the adapting surface (2212) are both regular hexagons.

4. The valve body according to claim 1, characterized in that: The connecting section (2) and the main chamber section (3) are of an integral structure.

5. The valve body according to claim 1, characterized in that: The wall thicknesses of the connecting section (2) and the main chamber section (3) are the same.

6. The valve body according to claim 1, wherein: The wrench opening section (22) is arranged on the connecting section (2). The connecting section (2) further includes an external connection section (21), and the external connection section (21) is located beside the wrench opening section (22) and in the axial extension direction of the wrench opening section (22).

7. The valve body according to claim 6, wherein: At the connection of the main chamber section (3) and the connecting section (2), a necking structure (31) is formed, and a valve seat groove (310) for installing a valve seat is formed in the necking structure (31).

8. The valve body according to claim 6, characterized in that: The external connection section (21) is a threaded section.

9. The valve body according to claim 6, wherein: The outer diameter of the wrench opening section (22) is greater than the outer diameter of the external connection section (21).

10. The valve body according to claim 6, characterized in that: The connecting section (2) further includes a connecting section (23). The two ends of the connecting section (23) are respectively connected to the wrench opening section (22) and the main chamber section (3). One end of the wrench opening section (22) is connected to the external connection section (21), and the wrench opening section (22) protrudes outwards.

11. The valve body according to claim 10, characterized in that: The wrench opening section (22) further includes a first frustum part (222) and a second frustum part (223). The large-diameter end of the first frustum part (222) is connected to one end of the wrench opening part (221), and the small-diameter end of the first frustum part (222) is connected to the external connection section (21); the large-diameter end of the second frustum part (223) is connected to the other end of the wrench opening part (221), and the small-diameter end of the second frustum part (223) is connected to the connecting section (23).

12. A ball valve, characterized in that: Comprising a valve body according to any one of claims 1-11.

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