Valve body casting

Abstract

The utility model relates to the technical field of valve bodies, in particular to a valve body casting which comprises a main body, a runner and a mounting cavity located in the middle of the runner are arranged in the main body, a mounting opening communicated with the mounting cavity is formed in the periphery of the mounting cavity, and the joint of the mounting cavity and the runner is a joint surface. The sectional dimension of the joint surface is gradually increased along the direction close to the mounting cavity; in the application, due to the arrangement of the joint surface, the material flow is more uniform in the casting process, and the possibility of defects such as shrinkage cavities and air holes in the casting process is reduced; after a valve body casting is cast, finish machining is carried out subsequently, and a lathe is used for machining a corresponding stepped groove in a joint surface, so that the casting quality of the valve body is improved.

Description

Technical Field

[0001] This application relates to valve bodies, and in particular to a valve body casting. Background Art

[0002] Valve body castings, as the core components of valves, are responsible for regulating fluid flow and play a crucial role in many industrial fields such as petroleum, chemical industry, and water treatment. The advancement of material selection, processing technology, and surface treatment technology directly determines the service life, corrosion resistance, and overall efficiency of valve body castings. With the rapid progress of industrial technology, the performance requirements for valve body castings are becoming increasingly stringent, not only pursuing higher strength and corrosion resistance but also expecting longer service life.

[0003] In the prior art, the design of valve body castings skillfully combines the main structure and the internal flow channel. An installation cavity is provided in the center of the flow channel for installing the valve flap or valve ball, and a special installation port is used for convenient assembly. Subsequently, the valve cover is fastened with bolts to close the installation port. In order to improve the sealing performance of the valve, the designer cleverly designs multiple stepped sunk grooves at the junction of the flow channel and the installation cavity for installing sealing rings, which significantly enhances the sealing effect of the valve.

[0004] However, although the design of the stepped sunk groove brings an improvement in sealing performance, it also poses challenges to the casting process of the valve body casting. Specifically, the stepped structure pre-designed on the mold directly forms the stepped sunk groove in the main structure during casting, but this jump-like thickness change (i.e., the existence of multiple stepped sunk grooves) may lead to uneven material flow during casting, increasing the risk of defects such as shrinkage cavities and gas holes, thus affecting the casting quality of the valve body casting and there is room for improvement. Summary of the Utility Model

[0005] The purpose of this application is to provide a valve body casting to solve the problem of casting defects caused by the stepped sunk groove design in the above related technologies.

[0006] A valve body casting provided by this application adopts the following technical solution:

[0007] A valve body casting includes a main body. A flow channel and an installation cavity located in the middle of the flow channel are provided inside the main body. An installation port communicating with the installation cavity is opened on the outer periphery of the installation cavity. The connection surface between the installation cavity and the flow channel is a connection surface, and the cross-sectional dimension of the connection surface increases in the direction close to the installation cavity.

[0008] By adopting the above technical solution, due to the setting of the connection surface, the material flow during casting is more uniform, reducing the possibility of defects such as shrinkage cavities and gas holes during casting; after the valve body casting is completed, subsequent finishing is carried out, and corresponding stepped grooves are machined on the connection surface by using a lathe to improve the casting quality of the valve body.

[0009] Optionally, a transition portion is fixedly provided on the outer side of the main body near the joint surface, and the outer diameter dimension of the transition portion decreases in the direction close to the opening of the flow channel.

[0010] By adopting the above technical solution, due to the arrangement of the transition portion on the main body, the cross-sectional thickness of the main body close to the joint surface is strengthened, thereby improving the structural strength of the main body and prolonging the service life of the main body.

[0011] Optionally, an annular boss connected to the transition portion is fixedly provided at the outer edge of the installation opening of the main body.

[0012] By adopting the above technical solution, due to the arrangement of the annular boss, corresponding screw holes can be machined on the annular rib during subsequent secondary processing, facilitating the assembly and fixation of the valve cover and the main body.

[0013] Optionally, an arc-shaped annular groove is provided around the axis at the connection between the outer side surface of the annular boss and the transition portion.

[0014] By adopting the above technical solution, the possibility of stress concentration at the connection between the annular rib and the transition portion is reduced, and the service life of the main body is prolonged.

[0015] Optionally, a guiding inclined surface is provided at the inner edge of the opening of the installation opening.

[0016] By adopting the above technical solution, it is convenient for the subsequent valve flap or valve core to pass through the installation opening along the guiding inclined surface and then be installed inside the installation cavity.

[0017] Optionally, a positioning boss is fixedly provided at the bottom side of the installation cavity, and a positioning counterbore coaxial with the installation opening is provided on the positioning boss.

[0018] By adopting the above technical solution, due to the arrangement of the positioning counterbore on the positioning rib, the installation and fixation of the rotating shaft on the valve flap or valve core are facilitated, and it is not necessary to additionally machine corresponding grooves on the main body subsequently, improving the overall processing efficiency of the valve.

[0019] Optionally, a positioning slot coaxial with the positioning counterbore is provided at the bottom side of the positioning counterbore.

[0020] By adopting the above technical solution, when the rotating shaft on the valve flap or valve core is installed and fixed, the installation stability of the subsequent valve flap or valve core installed in the valve body is further improved.

[0021] Optionally, a support portion is fixedly provided on the outer side surface of the main body away from the installation opening.

[0022] By adopting the above technical solution, the staff can place the formed main body on a plane through the supporting part, which is also convenient for packaging and transporting the main body, reducing the possibility of the main body turning over or moving during transportation.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Due to the setting of the connection surface, the material flow during casting is more uniform, reducing the possibility of defects such as shrinkage cavities and gas holes during casting; after the valve body casting is completed, subsequent finishing is carried out. By using a lathe to process corresponding stepped grooves on the connection surface, the casting quality of the valve body is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0027] Figure 2 is the cross-sectional structural schematic diagram of the embodiment of the present application.

[0028] In the figure, 1, main body; 11, flow channel; 12, installation cavity; 121, connection surface; 122, positioning boss; 1221, positioning sink; 1222, positioning slot; 13, installation opening; 131, guiding inclined surface; 14, transition part; 15, annular boss; 151, arc-shaped ring groove; 16, supporting part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will further elaborate on the present application in conjunction with all the drawings.

[0030] Embodiment:

[0031] Referring to Figure 1 and Figure 2 , a valve body casting includes a main body 1, wherein a flow channel 11 and an installation cavity 12 located in the middle of the flow channel 11 are provided in the main body 1. An installation opening 13 communicating with the installation cavity 12 is provided on the outer periphery of the installation cavity 12. The connection part between the installation cavity 12 and the flow channel 11 is a connection surface 121, and the cross-sectional dimension of the connection surface 121 increases in the direction close to the installation cavity 12;

[0032] After the valve body casting is completed, subsequent finishing is carried out, that is, using a lathe to process corresponding stepped grooves on the connection surface 121 to improve the casting quality of the valve body.

[0033] Referring to Figure 1 and Figure 2 , a transition portion 14 is integrally cast on the outer side of the main body 1 near the joint surface 121, and the outer diameter dimension of the transition portion 14 decreases along the direction close to the opening of the runner 11, thereby improving the structural strength of the main body 1. A guiding inclined surface 131 is provided at the inner edge of the opening of the mounting port 13, facilitating the subsequent installation of the valve flap or valve core into the interior of the mounting cavity 12 after passing through the mounting port 13 along the guiding inclined surface 131.

[0034] Referring to Figure 2 , a circular boss 15 connected to the transition portion 14 is fixedly provided at the outer edge of the mounting port 13 of the main body 1. Subsequently, corresponding screw holes can be machined on the circular rib, facilitating the assembly and fixation of the valve cover and the main body 1. An arc-shaped annular groove 151 is provided around the axis at the connection between the outer side surface of the circular boss 15 and the transition portion 14, thereby reducing the possibility of stress concentration at the connection between the circular rib and the transition portion 14 and extending the service life of the main body 1.

[0035] Referring to Figure 2 , a positioning boss 122 is fixedly provided at the bottom side of the mounting cavity 12. A positioning counterbore 1221 coaxial with the mounting port 13 is provided on the positioning boss 122, facilitating the installation and fixation of the rotating shaft on the valve flap or valve core, eliminating the need to subsequently machine corresponding grooves on the main body 1 separately and improving the overall processing efficiency of the valve. A positioning slot 1222 coaxial with the positioning counterbore 1221 is provided at the bottom side of the positioning counterbore 1221, further improving the installation stability of the subsequent valve flap or valve core in the valve body.

[0036] Referring to Figure 2 , a support portion 16 is integrally cast on the outer side surface of the main body 1 away from the mounting port 13, facilitating the placement of the formed main body 1 on a plane, facilitating the packaging and transportation of the main body 1, and reducing the possibility of the main body 1 flipping or moving during transportation.

[0037] The implementation principle of the embodiment of this application is as follows:

[0038] Due to the setting of the joint surface 121, the material flow during the casting process is more uniform, reducing the possibility of defects such as shrinkage cavities and air holes during the casting process; after the valve body casting is completed, subsequent finish machining is carried out, and corresponding stepped grooves are machined on the joint surface 121 using a lathe to improve the casting quality of the valve body.

[0039] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", "third" and similar words used in the text of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similar words such as "a" or "an" do not denote a quantity limitation either, but indicate that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Words such as "upper", "lower", "left", "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0040] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A valve body casting, comprising a main body (1), wherein a flow channel (11) and a mounting cavity (12) located in the middle of the flow channel (11) are arranged in the main body (1), and a mounting opening (13) communicating with the mounting cavity (12) is opened on the outer periphery of the mounting cavity (12), characterized in that: The connection point between the installation cavity (12) and the flow channel (11) is a connection surface (121), and the cross-sectional dimensions of the connection surface (121) increase gradually in a direction approaching the installation cavity (12).

2. A valve body casting according to claim 1, characterized in that: A transition portion (14) is fixedly provided on the outer side surface of the main body (1) close to the connecting surface (121), and the outer diameter of the transition portion (14) decreases along a direction close to the opening of the flow channel (11).

3. A valve body casting according to claim 2, characterized in that: The main body (1) is provided with an annular boss (15) at the outer edge of the installation opening (13) and connected with the transition portion (14).

4. A valve body casting according to claim 3, characterized in that: An arc-shaped annular groove (151) is provided around the axis of the annular boss (15) at the junction between the outer side surface of the annular boss (15) and the transition portion (14).

5. A valve body casting according to claim 1, characterized in that: A guiding inclined surface (131) is provided at the inner edge of the opening of the installation opening (13).

6. A valve body casting according to claim 1, characterized in that: A positioning boss (122) is fixedly provided on the bottom side of the installation cavity (12), and a positioning recessed groove (1221) coaxial with the installation opening (13) is provided on the positioning boss (122).

7. A valve body casting according to claim 6, characterized in that: A positioning slot (1222) coaxial with the positioning groove (1221) is provided on the bottom side of the positioning groove (1221).

8. A valve body casting according to claim 1, characterized in that: A support portion (16) is fixedly provided on the outer side surface of the main body (1) away from the installation opening (13).

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