Valve body and valve

Abstract

The utility model discloses a valve body which comprises a main body part and pipe joints which are respectively assembled and connected to two sides of the main body part, a main cavity is formed in the internal space of the main body part, each pipe joint is respectively communicated with the main cavity, each pipe joint comprises a wrench opening section for screwing, each wrench opening section comprises a wrench opening part, and the wrench opening part is provided with a screw hole. 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 shape of the adaptive surface is the same as that of the wrench opening surface; the utility model further discloses a valve with the valve body. According to the valve body, the precision casting technology is eliminated, the valve body is of a split type structure, namely, the main body part and the pipe joint of the valve body are independently machined, the pipe joint can be produced through the water expansion technology, the production period is shortened, the production cost is low, and the corresponding valve and the corresponding structure are high in reliability.

Description

Technical Field

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

[0002] Existing stainless steel valves, such as gate valves, globe valves and check valves, etc., all have an integrally formed valve body by precision casting. As Figure 1 shown, the valve body includes an integrally formed main body portion 1′, a left pipe joint 2′ and a right pipe joint 3′. The upper end of the main body portion 1′ is open, and its internal space forms a main chamber 10′ for accommodating a valve core. The left pipe joint 2′ and the right pipe joint 3′ are respectively connected to the main body portion 1′.

[0003] The above-mentioned stainless steel precision casting process of the valve body has problems such as long production cycle, high difficulty in mass production and high cost. Content of the Utility Model

[0004] The utility model provides a valve body and a valve, aiming at overcoming the problems of long cycle, high cost, etc. 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 body includes a main body portion and pipe joints respectively assembled and connected to both sides of the main body portion. The internal space of the main body portion forms a main chamber, and each of the pipe joints is respectively communicated with the main chamber. The pipe joint includes a wrench section for screwing, and the wrench section includes a wrench portion. The outer wall of the wrench portion forms a wrench surface, and the inner wall of the wrench portion forms a mating surface corresponding to the wrench surface, and the shape of the mating surface is the same as that of the wrench surface. The same shape of the wrench surface and the mating surface is an inevitable result of the hydroforming process.

[0007] In a recommended embodiment, the radial cross-sections of the wrench surface and the mating 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 mating 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 pipe joint further includes a first connection section for connecting with 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.

[0010] 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.

[0011] In a recommended embodiment, the pipe joint further includes a second connection section for fixedly connecting with the main body section. One end of the wrench section is connected to the first connection section, the other end of the wrench section is connected to the second connection section, and the wrench section protrudes from the first connection section and the second connection section. This structure is a preferred mode, which is not only beneficial to the hydroforming of the pipe joint, but also does not interfere with the use of the wrench.

[0012] In a recommended embodiment, the first connection section, the wrench section, and the second connection section are of an integral structure, and the wall thicknesses of the first connection section, the wrench section, and the second connection section are the same. The integral structure with the same wall thickness is more conducive to improving the structural reliability.

[0013] In a recommended embodiment, the pipe joint is hydroformed.

[0014] In a recommended embodiment, each of the pipe joints is welded to both sides of the main body section. Considering the actual assembly, welding is a preferred method here.

[0015] A valve includes the above-mentioned valve body.

[0016] In a recommended embodiment, the valve further includes a gate plate, which is installed in the main chamber of the main body section in a liftable manner. The main body section includes a tapered pipe section that is hermetically matched with the gate plate. Connecting holes are respectively opened on opposite sides of the tapered pipe section. Each of the pipe joints is fixedly connected to the corresponding connecting hole, and in order to avoid interference with the lifting of the gate plate, the inner end of the pipe joint is located outside the main chamber. The pipe joint in this embodiment is usually formed by a hydroforming process, and its wall thickness is relatively thin. Therefore, in this embodiment, the tapered pipe section is used to seal and cooperate with the gate plate to ensure the sealing performance.

[0017] Advantages of the present utility model:

[0018] The valve body of the present utility model eliminates the investment casting process. The valve body adopts a split structure, that is, the main body section and the pipe joint of the valve body are processed independently. Among them, the pipe joint can be produced by a hydroforming process. It not only shortens the production cycle and has low production cost, but also the corresponding valve has high structural reliability. Description of the drawings

[0019] Figure 1 It is a cross-sectional view of an existing valve body.

[0020] Figure 2 It is an exploded structural schematic diagram of the valve body.

[0021] Figure 3It is a schematic cross-sectional structure diagram of the valve body.

[0022] Figure 4 It is a schematic diagram of the simple processing process of the main body part.

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the main body part.

[0024] Figure 6 It is a schematic cross-sectional structure diagram of the pipe joint.

[0025] Figure 7 It is Figure 6 an enlarged structure diagram of part A in

[0026] Figure 8 It is a schematic cross-sectional structure diagram of the gate plate added. Specific implementation manners

[0027] The following further describes the present utility model in detail with reference to the 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 convenience of description, only the parts related to the present utility model are shown in the drawings rather than all the structures.

[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 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 situations.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the non-direct contact of the first and second features but through other features between them. Moreover, the first feature being "above", "above the", and "on the" of 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", "below the", and "under the" of 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.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] Reference Figure 2 and Figure 3 , a valve body. The valve body 1 of this embodiment adopts a split structure, which includes a main body 2 and pipe joints 3 respectively assembled and connected to both sides of the main body 2 (this embodiment adopts welding to fix the connection), the internal space of the main body 2 forms a main chamber 20, and each of the pipe joints 3 is respectively connected to the main chamber 20.

[0032] In this embodiment, the main body 2 and the pipe joint 3 are independently processed using different processes.

[0033] Reference Figure 4 The main body 2 is formed by the substrate 200 through multiple extrusions. The extrusion process is a prior art, and the specific processing process is not described here. Figure 5 In this embodiment, the main body 2 is an open structure, which includes an external pipe section 21, a connecting pipe section 22, a tapered pipe section 23 and a bottom plate 24 from top to bottom. The external pipe section 21 is usually a straight pipe with threads, which is usually used to connect with the valve cover of the valve; the axial section of the connecting pipe section 22 is trapezoidal, the large diameter end of the connecting pipe section 22 is connected to the external pipe section 21, and the small diameter end of the connecting pipe section 22 is connected to the large diameter end of the tapered pipe section 23; the small diameter end of the tapered pipe section 23 is connected to the bottom plate 24. As can be seen from the figure, the opposite side of the tapered pipe section 23 is provided with a connecting hole 230, and the connecting hole 230 is connected to the main chamber 20.

[0034] Reference Figure 6 The pipe joint 3 is formed by a water swelling process, which is a prior art, and its specific working principle is not described here. The pipe joint 3 of this embodiment is formed in one step with a straight pipe as the base pipe.

[0035] The pipe joint 3 is of an integral structure, which includes a wrench section 31 for screwing, a first connection section 32 for connecting with a pipeline, and a second connection section 33 for fixedly connecting with the main body 2. The first connection section 32 and the second connection section 33 are respectively located in the axial direction of the wrench section 31, and are respectively fixed on the left and right sides of the wrench section 31. The wall thicknesses of the first connection section 32, the wrench section 31 and the second connection section 33 are the same (it should be noted that when threads are cut on the first connection section 32 or the second connection section 33, the outer diameter of the threads is the same as the outer diameter of the rest of the pipe joint 3).

[0036] In this embodiment, the first connection section 32 is provided with internal threads for connecting with an external pipeline (not shown in the figure). The second connection section 33 is welded to the connection hole 230 of the tapered pipe section 23 by welding.

[0037] In a recommended implementation manner, the wrench section 31 protrudes from the first connection section 32 and the second connection section 33. As a preferred structure, this not only facilitates the hydroforming of the pipe joint 3, but also does not interfere with the use of the wrench.

[0038] Refer to Figure 7 , the wrench section 31 includes a frustum section 311 connected in sequence, a wrench portion 312 extending axially, and a radial portion 313 extending radially. The small-diameter end of the frustum section 311 is fixed to the first connection section 32, and the large-diameter end of the frustum section 311 is fixed to one end of the wrench portion 312; the large-diameter end of the radial portion 313 is fixed to the other end of the wrench portion 312, and the small-diameter end of the radial portion 313 is fixed to the second connection section 33.

[0039] Continue to refer to Figure 7 , an outer wall of the wrench portion 312 forms a wrench surface 3121, and an inner wall of the wrench portion 312 forms an adaptation surface 3122 corresponding to the wrench surface 3121. The adaptation surface 3122 has the same shape as the wrench surface 3121 (which is an inevitable result of the hydroforming process). In this embodiment, the radial cross-sections of the wrench surface 3121 and the adaptation surface 3122 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.

[0040] At the same time, refer to Figure 8, a gate valve, comprising a valve cover (not shown in the figure), a valve stem (not shown in the figure), a valve body 1 and a gate plate 4 (a wedge shape in this embodiment), the gate plate 4 is installed in the main chamber 20 of the valve body 1 in a liftable manner, the main body portion 2 includes a tapered pipe section 23 that is sealingly fitted with the gate plate 4, connection holes 230 are respectively formed on opposite sides of the tapered pipe section 23, each of the pipe connectors 3 is welded to the corresponding connection hole 230, and to avoid interference with the lifting of the gate plate 4, although the second connection section 33 of the pipe connector 3 extends into the connection hole 230, the inner end of the second connection section 33 is located outside the main chamber 20. The pipe connector 3 is usually formed by a hydroforming process and has a relatively thin wall thickness. Therefore, in this embodiment, the tapered pipe section 23 is used to seal with the gate plate 4 to ensure the sealing performance of the gate valve.

[0041] In addition, the valve in this embodiment is described by taking a gate valve as an example. It is worth mentioning that the pipe connector of the present invention is not limited to a gate valve and can also be applied to a globe valve, a check valve, etc.

[0042] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention and are not limitations on 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, comprising a main body portion (2) and pipe connectors (3) respectively assembled and connected to both sides of the main body portion (2), an internal space of the main body portion (2) forms a main chamber (20), each of the pipe connectors (3) is respectively communicated with the main chamber (20), the pipe connector (3) includes a wrench section (31) for screwing, the wrench section (31) includes a wrench portion (312), an outer wall of the wrench portion (312) forms a wrench surface (3121), and is characterized in that: The inner wall of the wrench opening portion (312) forms a mating surface (3122) corresponding to the wrench opening surface (3121), and the shape of the mating surface (3122) is the same as that of the wrench opening surface (3121).

2. The valve body according to claim 1, wherein: The radial cross-sections of the wrench opening surface (3121) and the mating surface (3122) are both polygons.

3. The valve body according to claim 2, wherein: The radial cross-sections of the wrench opening surface (3121) and the mating surface (3122) are both regular hexagons.

4. The valve body according to claim 1, wherein: The pipe joint (3) further includes a first connection section (32) for connecting with a pipeline. The first connection section (32) is located beside the wrench opening section (31) and is in the axial extension direction of the wrench opening section (31).

5. The valve body according to claim 4, characterized in that: The first connection section (32) is provided with internal threads or external threads.

6. The valve body according to claim 1, characterized in that: The pipe joint (3) further includes a second connection section (33) for fixedly connecting with the main body portion (2). One end of the wrench opening section (31) is connected to the first connection section (32), the other end of the wrench opening section (31) is connected to the second connection section (33), and the wrench opening section (31) protrudes from the first connection section (32) and the second connection section (33).

7. The valve body according to claim 6, characterized in that: The first connection section (32), the wrench opening section (31), and the second connection section (33) are of an integral structure, and the wall thicknesses of the first connection section (32), the wrench opening section (31), and the second connection section (33) are the same.

8. The valve body according to claim 7, characterized in that: The pipe joint (3) is formed by hydroforming.

9. The valve body according to claim 1, wherein: Each of the pipe joints (3) is welded to both sides of the main body portion (2).

10. A valve, characterized in that: It includes the valve body (1) as described in any one of claims 1-8.

11. The valve according to claim 10, characterized in that: The valve further includes a gate plate (4). The gate plate (4) is installed in the main chamber (20) of the main body portion (2) in a liftable manner. The main body portion (2) includes a tapered pipe section (23) that seals and mates with the gate plate (4). Connection holes (230) are respectively formed on opposite sides of the tapered pipe section (23). Each of the pipe joints (3) is fixedly connected to the corresponding connection hole (230), and the inner end of the pipe joint (3) is located outside the main chamber (20).

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