double ball valve

Abstract

This invention relates to a double-ball valve, comprising a first valve ball and a second valve ball connected to each other, and further comprising a first connecting portion and a second connecting portion, wherein the first connecting portion is disposed on a first side of the first valve ball opposite to the second valve ball, and the second connecting portion is disposed on a second side of the second valve ball opposite to the first valve ball, wherein the first connecting portion comprises a first toothed section and a first mating hole section, the first mating hole section being closer to the first side of the first valve ball than the first toothed section, and the second connecting portion comprises a second toothed section and a second mating shaft section, the second toothed section being closer to the second side of the second valve ball than the second mating shaft section, the first toothed section being configured to mesh with the second toothed section, and the first mating hole section being configured to have an interference fit with the second mating shaft section.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a double ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element is driven by a valve stem and rotates around the ball valve axis. It can also be used for fluid regulation and control. Ball valves are widely used due to their large diameter, lack of flow resistance, and high pressure capability.

[0003] As a type of ball valve, the double-ball valve also exhibits the aforementioned characteristics. In existing double-ball valves, the first and second valve balls are integrally molded components. During injection molding, because the double-ball valve has a first and a second valve ball, the injection material reaches the first valve ball first, followed by the second, making it difficult to completely fill the second valve ball. This leads to unstable shrinkage at the surface of the second valve ball, thus increasing tooling adjustment costs and time. Furthermore, the surface contour quality of the second valve ball is poor, negatively impacting sealing, cooling, and other performance characteristics. In addition, double-ball valves with an integrally molded first and second valve ball are difficult to use in applications with different control logic requirements, i.e., they have poor versatility. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a double ball valve that is easy to manufacture with high quality, has good performance, and is versatile.

[0005] This invention provides a double-ball valve, comprising a first valve ball and a second valve ball connected to each other.

[0006] It also includes a first connecting portion and a second connecting portion, wherein the first connecting portion is disposed on a first side of the first valve ball opposite to the second valve ball, and the second connecting portion is disposed on a second side of the second valve ball opposite to the first valve ball, wherein...

[0007] The first connecting portion includes a first toothed section and a first mating hole section, the first mating hole section being closer to the first side of the first valve ball than the first toothed section; and the second connecting portion includes a second toothed section and a second mating shaft section, the second toothed section being closer to the second side of the second valve ball than the second mating shaft section; the first toothed section is configured to mesh with the second toothed section, and the first mating hole section is configured to have an interference fit with the second mating shaft section.

[0008] According to an embodiment of the present invention, a first marking portion and a second marking portion are further included. The first marking portion and the second marking portion are configured to determine the circumferential position between the first valve ball and the second valve ball when aligned with each other. The first marking portion is disposed on a first side of the first valve ball opposite to the second valve ball, and the second marking portion is disposed on a second side of the second valve ball opposite to the first valve ball.

[0009] According to an embodiment of the present invention, the first marking portion is disposed on the first tooth segment, and the second marking portion is disposed on the second tooth segment.

[0010] According to an embodiment of the present invention, the first tooth gap with the largest tooth gap between two teeth in the first tooth portion is configured to serve as the first marking portion, and the second tooth with the largest circumferential dimension in the second tooth portion is configured to serve as the second marking portion.

[0011] According to an embodiment of the present invention, it further includes a first positioning part and a second positioning part, the first positioning part and the second positioning part being configured to determine the axial position between the first valve ball and the second valve ball when they abut against each other.

[0012] According to an embodiment of the present invention, the first side of the first valve ball located on the first side is configured to serve as the first positioning part, and the second side of the second valve ball located on the second side is configured to serve as the second positioning part.

[0013] According to an embodiment of the present invention, the axial dimension of the first toothed section is configured to be smaller than the axial dimension of the first mating hole section, and the axial dimension of the second toothed section is configured to be smaller than the axial dimension of the second mating shaft section. Attached Figure Description

[0014] Figure 1 The diagram schematically illustrates a double ball valve in its separated state according to an embodiment of the present invention.

[0015] Figure 2 A double ball valve in its connected state is schematically shown according to an embodiment of the present invention.

[0016] Figure 3 schematically shown Figure 2 Enlarged view of part A in the middle. Detailed Implementation

[0017] The following describes specific embodiments of the double-ball valve according to the present invention in conjunction with the accompanying drawings. The detailed description and drawings below are provided to illustrate the principles of the invention, and the invention is not limited to the described preferred embodiments; the scope of protection of the invention is defined by the claims.

[0018] Figure 1 A double-ball valve in its separated state is schematically illustrated according to an embodiment of the present invention. Reference is made below. Figure 1 A double ball valve according to an embodiment of the present invention is described.

[0019] like Figure 1 As shown, the dual-ball valve 100 according to an embodiment of the present invention includes a first valve ball 200 and a second valve ball 300. It should be noted that... Figure 1 The first valve ball 200 and the second valve ball 300 of the shown double ball valve 100 are in a separated state; however, the first valve ball 200 and the second valve ball 300 can be connected to each other, and the first valve ball 200 and the second valve ball 300 in the connected state of the double ball valve 100... Figure 2 As shown in the image. It should also be noted that, for... Figure 1 The placement orientation of the first valve ball 200 and the second valve ball 300 is shown in the diagram, with the right side of the first valve ball 200 connected to the left side of the second valve ball 300. (Continue referring to...) Figure 1 The dual ball valve 100 further includes a first connecting portion 201 and a second connecting portion 301, wherein the first connecting portion 201 is disposed on a first side of the first valve ball 200 opposite to the second valve ball 300 (i.e., Figure 1 The second connecting portion 301 is located on the right side of the first valve ball 200, opposite to the first valve ball 200. Figure 1 (Left side of the second valve ball 300).

[0020] The following continues to refer to Figure 1 The first connecting part 201 and the second connecting part 301 will be described in detail.

[0021] like Figure 1 As shown, the first connecting portion 201 includes a first toothed section 2011 and a first mating hole section 2012 disposed adjacent to each other. Figure 1 In the first connecting portion 201, the first mating hole section 2012 is closer to the right side of the first valve ball 200 than the first toothed section 2011, so that when the first valve ball 200 and the second valve ball 300 are connected, the first mating hole section 2012 connects to the second valve ball 300 earlier than the first toothed section 2011. Furthermore, the second connecting portion 301 includes an adjacently arranged second toothed section 3011 and a second mating shaft section 3012. Figure 1In this configuration, the second toothed section 3011 is closer to the left side of the second valve ball 300 than the second mating shaft section 3012, so that when the first valve ball 200 and the second valve ball 300 are connected, the second toothed section 3011 connects to the first valve ball 200 earlier than the second mating shaft section 3012. The first toothed section 2011 is configured to mesh with the second toothed section 3011, and the first mating hole section 2012 is configured to have an interference fit with the second mating shaft section 3012. Figure 2 This is shown more clearly in the text. Although Figure 1 The diagram shows that the first toothed section 2011 and the first mating hole section 2012 of the first connecting portion 201 are adjacent to each other, and the second toothed section 3011 and the second mating shaft section 3012 of the second connecting portion 301 are adjacent to each other. However, this is just an example. In the double ball valve of the present invention, the first toothed section and the first mating hole section of the first connecting portion can also be set to be separated, and the second toothed section and the second mating shaft section of the second connecting portion can also be set to be separated.

[0022] Continue to refer to Figure 1 The dual-ball valve 100 further includes a first marking portion disposed on a first toothed section 2011 and a second marking portion disposed on a second toothed section 3011. Specifically, a first tooth gap 2013 with the largest tooth clearance between two teeth in the first toothed section 2011 is configured to serve as the first marking portion, and a second tooth 3013 with the largest circumferential dimension in the second toothed section 3011 is configured to serve as the second marking portion. When the first tooth gap 2013 and the first tooth 3013 are aligned with each other, the circumferential position between the first valve ball 200 and the second valve ball 300 can be determined. Those skilled in the art will understand that, as an alternative example, Figure 1 The first marking portion in the form of tooth gap 2013 shown can be alternatively set as a tooth portion, and accordingly, Figure 1 The second marking portion in the form of tooth 3013 shown can be correspondingly configured as a tooth gap. Figure 1 The illustration shows an embodiment where the first marking portion is in the form of a tooth gap and the second marking portion is in the form of a tooth. However, the double ball valve of the present invention is not limited to the above embodiment. For example, the first marking portion and the second marking portion can also be recessed marking portions respectively provided on the inner circumferential surface of the first tooth section and the inner circumferential surface of the second tooth section. For another example, the first marking portion and the second marking portion can also be respectively provided on the outer surface of the first side of the first valve ball and the outer surface of the second side of the second valve ball, as long as the circumferential position between the first valve ball and the second valve ball can be determined when the first marking portion and the second marking portion are aligned with each other.

[0023] Continue to refer to Figure 1The dual-ball valve 100 also includes a first positioning portion and a second positioning portion. A first side surface 200A of the first valve ball 200 located on a first side is configured to serve as the first positioning portion, and a second side surface 300A of the second valve ball 300 located on a second side is configured to serve as the second positioning portion. When the first side surface 200A and the second side surface 300A abut against each other, the axial position between the first valve ball 200 and the second valve ball 300 can be determined. Although Figure 1 The first positioning part and the second positioning part shown are respectively set as the first side surface of the first valve ball and the second side surface of the second valve ball. However, the double ball valve of the present invention is not limited to the above embodiment. In fact, the first positioning part and the second positioning part only need to be able to determine the axial position between the first valve ball and the second valve ball when they are abutting each other.

[0024] As a preferred embodiment of the present invention, such as Figure 1 As shown, the axial dimension of the first toothed section 2011 is configured to be smaller than the axial dimension of the first mating hole section 2012, and the axial dimension of the second toothed section 3011 is configured to be smaller than the axial dimension of the second mating shaft section 3012, so that the first valve ball 200 and the second valve ball 300 can be easily and reliably connected.

[0025] Figure 2 A double ball valve in its connected state is schematically shown according to an embodiment of the present invention. Figure 3 schematically shown Figure 2 A magnified view of section A in the middle. See below for reference. Figure 2 and Figure 3 A double ball valve according to an embodiment of the present invention is described.

[0026] like Figure 2 As shown, when Figure 1 When connecting the first valve ball 200 and the second valve ball 300, which are in a separated state, firstly, the first marking portion in the form of the tooth gap 2013 of the first valve ball 200 and the second marking portion in the form of the tooth 3013 of the second valve ball 300 are aligned to determine the circumferential position between the first valve ball 200 and the second valve ball 300. Next, as the first valve ball 200 and the second valve ball 300 approach each other, the first tooth section 2011 of the first valve ball 200 and the second tooth section 3011 of the second valve ball 300 engage. Afterward, the first mating hole section 2012 of the first valve ball 200 and the second mating shaft section 3012 of the second valve ball 300 are press-fitted (e.g., ...). Figure 3 (This interference fit is shown more clearly). Finally, as the first valve ball 200 and the second valve ball 300 move closer together, the first side surface 200A of the first valve ball 200 on the first side and the second side surface 300A of the second valve ball 300 on the second side abut against each other to determine the axial position between the first valve ball 200 and the second valve ball 300 (e.g., ...). Figure 3(This more clearly shows the situation where the first side 200A and the second side 300A are abutting each other). At this point, the connection between the first ball 200 and the second ball 300 of the double ball valve 100 is completed.

[0027] Therefore, in the dual-ball valve of the present invention, since the first valve ball and the second valve ball are two separate components, the first and second valve balls can be manufactured separately during the manufacturing process of the dual-ball valve of the present invention. This avoids the manufacturing method where injection molding material first reaches the first valve ball and then reaches the second valve ball, thereby solving the problem that the second valve ball is difficult to fully fill. Therefore, the dual-ball valve of the present invention can be manufactured with high quality. Moreover, correspondingly, the surface profile quality of the second valve ball is good, ensuring good performance in terms of sealing effect, cooling effect, etc. Furthermore, since the first and second valve balls are two separate components in the dual-ball valve of the present invention, it can be used in applications with different control logic requirements, that is, it has good versatility.

[0028] As previously described, although exemplary embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the specific embodiments described above, and the scope of protection of the present invention should be defined by the claims and their equivalents.

Claims

1. A double ball valve (100) comprising a first valve ball (200) and a second valve ball (300) connected to each other. Its features are, It also includes a first connecting portion (201) and a second connecting portion (301), wherein the first connecting portion (201) is disposed on a first side of the first valve ball (200) opposite to the second valve ball (300), and the second connecting portion (301) is disposed on a second side of the second valve ball (300) opposite to the first valve ball (200), wherein, The first connecting portion (201) includes a first toothed section (2011) and a first mating hole section (2012), the first mating hole section (2012) being closer to the first side of the first valve ball (200) than the first toothed section (2011). The second connecting portion (301) includes a second toothed section (3011) and a second mating shaft section (3012), the second toothed section (3012) being closer to the second side of the second valve ball (300) than the second mating shaft section (3011). The first toothed section (2011) is configured to mesh with the second toothed section (3011), and the first mating hole section (2012) is configured to have an interference fit with the second mating shaft section (3012).

2. The double ball valve (100) according to claim 1, wherein, It also includes a first marking portion and a second marking portion, which are configured to determine the circumferential position between the first valve ball (200) and the second valve ball (300) when aligned with each other. The first marking portion is disposed on a first side of the first valve ball (200) opposite to the second valve ball (300), and the second marking portion is disposed on a second side of the second valve ball (300) opposite to the first valve ball (200).

3. The double ball valve (100) according to claim 2, wherein, The first marking portion is disposed on the first toothed section (2011), and the second marking portion is disposed on the second toothed section (3011).

4. The double ball valve (100) according to claim 3, wherein, The first tooth gap (2013) with the largest tooth gap between two teeth in the first tooth segment (2011) is configured to serve as the first marking part, and the second tooth (3013) with the largest circumferential dimension in the second tooth segment (3011) is configured to serve as the second marking part.

5. The double ball valve (100) according to claim 4, wherein, It also includes a first positioning part and a second positioning part, which are configured to determine the axial position between the first valve ball (200) and the second valve ball (300) when they abut against each other.

6. The double ball valve (100) according to claim 5, wherein, The first side surface (200A) of the first valve ball (200) located on the first side is configured to serve as the first positioning part, and the second side surface (300A) of the second valve ball (300) located on the second side is configured to serve as the second positioning part.

7. The double ball valve (100) according to claim 6, wherein, The axial dimension of the first toothed section (2011) is configured to be smaller than the axial dimension of the first mating hole section (2012), and the axial dimension of the second toothed section (3011) is configured to be smaller than the axial dimension of the second mating shaft section (3012).

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