A valve for metal vapor flow regulation

Abstract

The application discloses a valve for metal vapor flow regulation, which comprises a valve seat and a valve body, wherein the valve body comprises a valve core and a shaft rod fixedly connected with the valve core, and a valve core hole is arranged on the valve core; a sliding groove is arranged on the outer circumferential surface of the shaft rod, and the sliding groove comprises a spiral curve part; a sliding pin is fixedly connected with the valve seat, and the sliding pin is arranged in the sliding groove; and the spiral curve part is arranged so that when the valve body moves in the axial direction relative to the valve seat, the valve body also rotates in the circumferential direction relative to the valve seat to adjust the opening degree of the valve core hole.

Description

Technical Field

[0001] This invention relates to an opening and closing device, and more particularly to a valve device for flow regulation. Background Technology

[0002] In the industry, valves are needed to regulate the flow rate of zinc vapor in equipment used for zinc powder preparation and vacuum galvanizing. Currently, ball valves are mostly used in zinc powder preparation, while butterfly valves are mostly used in vacuum galvanizing.

[0003] However, zinc vapor is highly corrosive to common metals, which can cause corrosion and damage to existing valves.

[0004] Furthermore, the valves currently in use are also highly susceptible to zinc vapor leakage during pipeline transportation. Summary of the Invention

[0005] The purpose of this invention is to provide a valve for regulating the flow of metal vapor, which is suitable for controlling the flow of metal vapor in a vacuum environment. It has a simple structure and good sealing performance.

[0006] To achieve the above objectives, the present invention provides a valve for regulating the flow rate of metal vapor, comprising a valve seat and a valve body, wherein:

[0007] The valve body includes a valve core and a shaft fixedly connected to the valve core. The valve core has a valve core hole. The outer circumferential surface of the shaft has a sliding groove, and the sliding groove includes a helical curve portion.

[0008] A sliding pin is fixedly connected to the valve seat, and the sliding pin is correspondingly disposed in the sliding groove;

[0009] The spiral curve section is configured such that when the valve body moves axially relative to the valve seat, the valve body also rotates circumferentially relative to the valve seat to adjust the opening of the valve core hole.

[0010] Furthermore, in the valve described in this invention, the slide groove further includes a straight portion that connects with the spiral curve portion, the straight portion extending in the axial direction.

[0011] Furthermore, in the valve described in this invention, both ends of the spiral curve portion are connected to the straight portion.

[0012] Furthermore, in the valve described in this invention, the extension length of the straight portion is 1 to 30 mm.

[0013] Furthermore, in the valve described in this invention, a heating element is provided inside the valve seat and / or valve core.

[0014] Furthermore, in the valve described in this invention, the valve core is frustum-shaped.

[0015] Furthermore, in the valve described in this invention, the valve core and / or valve seat are made of graphite.

[0016] Furthermore, in the valve described in this invention, the surfaces of the valve core and / or valve seat that come into contact with zinc vapor have a graphite layer.

[0017] Furthermore, in the valve described in this invention, the valve core includes a body and a sealing block located beside the body, the sealing block being configured to float relative to the body in the axial direction.

[0018] Furthermore, in the valve described in this invention, the density of the graphite or graphite layer is ≥1.75 g / cm³. 3 The coefficient of thermal expansion is ≤4.3×10. -6 / ℃, impedance ≥1550μΩcm, porosity <10%, thermal conductivity ≤85W / m·℃.

[0019] The valve for regulating the flow of metal vapor described in this invention is suitable for controlling the flow of metal vapor in a vacuum environment. It has a simple structure and good sealing performance.

[0020] The valve for regulating the flow of metal steam described in this invention has excellent corrosion resistance.

[0021] The valve for regulating the flow of metal vapor described in this invention can ensure that the valve is not affected by thermal expansion and contraction when rotating, while satisfying the requirements of tightness when shutting off and smoothness when regulating.

[0022] In some embodiments, the valve for regulating the flow rate of metal vapor described in this invention can also ensure that the metal vapor does not condense due to temperature drop when passing through the valve. Attached Figure Description

[0023] Figure 1 The diagram shows the external structure of the valve for regulating the flow rate of metal vapor according to one embodiment of the present invention.

[0024] Figure 2 The diagram shows a structural schematic of the valve body in one embodiment of the valve for regulating the flow rate of metal vapor according to the present invention.

[0025] Figure 3 The structure of the shaft of the valve for regulating the flow rate of metal vapor described in this invention is shown in one embodiment.

[0026] Figure 4 The structure of the shaft sleeve in one embodiment of the valve for regulating the flow rate of metal vapor described in this invention is shown.

[0027] Figure 5 and Figure 6 The diagrams show the opening and closing of the valve for regulating metal vapor flow as described in this invention.

[0028] Figure 7 The structure of the valve core in one embodiment of the valve for regulating the flow rate of metal vapor described in this invention is shown.

[0029] Figure 8 and Figure 9 The diagrams show the valve for regulating metal vapor flow as described in this invention when it is closed and when it is opened to its maximum degree. Detailed Implementation

[0030] The valve for regulating metal steam flow according to the present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, this explanation and description do not constitute an undue limitation on the technical solution of the present invention.

[0031] Figure 1 The diagram shows the external structure of the valve for regulating the flow rate of metal vapor according to one embodiment of the present invention.

[0032] Figure 2 The diagram shows a structural schematic of the valve body in one embodiment of the valve for regulating the flow rate of metal vapor according to the present invention.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the valve for regulating the flow rate of metal vapor includes a valve seat 1 and a valve body 2. The valve body 2 moves relative to the valve seat 1 to adjust the valve opening, thereby achieving flow regulation. To facilitate operation of the valve body 2 relative to the valve seat 1, a handle 21 may be provided on the upper part of the valve body 2.

[0034] like Figure 2 As shown, the valve body 2 includes a valve core 22 and a shaft 23 fixedly connected to the valve core. The valve core is provided with a valve core hole 221. The valve opening can be adjusted by adjusting the relative position of the valve core hole 221 and the valve seat hole, thereby adjusting the flow rate of metal vapor.

[0035] Figure 3 The structure of the shaft of the valve for regulating the flow rate of metal vapor described in this invention is shown in one embodiment.

[0036] Figure 4 The structure of the shaft sleeve in one embodiment of the valve for regulating the flow rate of metal vapor described in this invention is shown.

[0037] like Figure 3As shown, in some embodiments, a groove 231 is provided on the outer circumferential surface of the shaft 23, and the groove 231 includes a helical curve portion 2311. For example... Figure 1 and Figure 4 As shown, the shaft engages with a shaft sleeve 11 fixedly mounted on the valve seat 1, and is disposed within the shaft sleeve 11. The shaft sleeve has a radially inwardly extending sliding pin 3, which is correspondingly disposed within the sliding groove 231 and is capable of sliding along the sliding groove 231.

[0038] The spiral curve section 2311 is configured such that when the valve body 2 moves in the axial direction relative to the valve seat 1, the valve body 2 also rotates in the circumferential direction relative to the valve seat 1 to adjust the opening of the valve core hole.

[0039] In some more specific implementations, such as Figure 3 As shown, the groove 231 also includes a straight portion 2312 that connects with the spiral curve portion 2311, and the straight portion extends in the axial direction.

[0040] In some more specific implementations, such as Figure 3 As shown, both ends of the spiral curve portion 2311 are connected to straight portions 2312.

[0041] In some more specific embodiments, the extension length of the straight portion is 1 to 30 mm.

[0042] With this setting, when opening the valve, the valve core is slightly lifted first, that is, the sliding pin slides along the straight part first, and then the valve core gradually rises during the opening process. This method can ensure smooth flow regulation and reduce the impact of thermal expansion and contraction on the opening and closing of the valve.

[0043] In some more specific implementations, such as Figure 5 As shown, the valve core 22 is frustum-shaped. Setting the valve core to a frustum shape further ensures that it is not affected by thermal expansion and contraction during rotation, while simultaneously satisfying the requirements of tightness during shut-off and smoothness during adjustment. When shut off, the frustum-shaped valve core sinks, ensuring a tight seal.

[0044] However, as Figure 6 As shown, when the valve core 22 rises, a gap G may be generated between the valve core 22 and the valve seat 1, which may cause leakage of metal vapor, such as zinc vapor.

[0045] Based on this, in some preferred embodiments, such as Figure 7As shown, the valve core 22 includes a body 222 and a sealing block 223 located beside the body. The sealing block 223 is configured to float axially relative to the body 222. In this way, when the body 222 of the valve core rises, the sealing block 223 descends relative to the body, thereby eliminating the gap between the valve core 22 and the valve seat, thus further ensuring sealing performance.

[0046] In some more specific embodiments, the sliding fit between the body 222 and the sealing block 223 can be achieved by the protrusion 224 on the body and the groove on the sealing block that is adapted to it.

[0047] In some preferred embodiments, a heating element may be provided in the valve seat and / or valve core, for example, by embedding the heating element, to ensure that metal vapor does not condense due to temperature drop when passing through the valve.

[0048] In some preferred embodiments, considering that galvanic corrosion may occur between zinc or other metals or alloying may occur at high temperatures, the valve core and / or valve seat may be made of graphite to further improve the corrosion resistance of the valve.

[0049] When the valve core includes a body and a sealing block, the sealing block is preferably made of graphite.

[0050] Alternatively, in some other embodiments, the surfaces of the valve core and / or valve seat that come into contact with zinc vapor have a graphite layer.

[0051] In some specific implementations, the graphite or graphite layer may be isostatically pressed high-purity graphite.

[0052] In some more specific embodiments, the density of the graphite or graphite layer is ≥1.75 g / cm3, the coefficient of thermal expansion is ≤4.3×10-6 / ℃, the impedance is ≥1550μΩcm, the porosity is <10%, and the thermal conductivity is ≤85W / m·℃.

[0053] To prevent leakage, the bottom of valve core 22 is as close as possible to valve seat 1.

[0054] Figure 8 The image shows the valve for regulating the flow rate of metal vapor as described in this invention in the closed state. When preparing to open the valve, first pull the valve core upwards a certain distance (i.e., slide the sliding pin along the straight section). This ensures that the valve core will not jam when rotating relative to the valve seat. Then, rotate the valve core to the appropriate position according to the flow rate requirement. Figure 9 The position of the valve core is displayed at maximum flow rate. At this point, the sealing block can slide down relative to the body to prevent the valve core from increasing the gap between the valve seat and the valve body, which would cause metal vapor to flow in.

[0055] Therefore, the valve for regulating the flow of metal vapor described in this invention is suitable for controlling the flow of metal vapor in a vacuum environment, and has a simple structure and good sealing performance.

[0056] The valve for regulating the flow of metal steam described in this invention has excellent corrosion resistance.

[0057] The valve for regulating the flow of metal vapor described in this invention can ensure that the valve is not affected by thermal expansion and contraction when rotating, while satisfying the requirements of tightness when shutting off and smoothness when regulating.

[0058] In some embodiments, when a heating element is provided, the valve for regulating the flow rate of metal vapor described in this invention can also ensure that the metal vapor does not condense due to temperature drop as it passes through the valve.

[0059] It should be noted that the combination of the technical features in this case is not limited to the combination methods described in the claims of this case or the combination methods described in the specific embodiments. All technical features described in this case can be freely combined or combined in any way, unless they contradict each other.

[0060] Furthermore, it should be noted that the above examples are merely specific embodiments of the present invention, and the present invention is obviously not limited to the above embodiments, with many similar variations. All modifications that can be directly derived or conceived by those skilled in the art from the disclosure of this invention should fall within the protection scope of this invention.

Claims

1. A valve for regulating the flow rate of metal steam, comprising a valve seat and a valve body, characterized in that: The valve body includes a valve core and a shaft fixedly connected to the valve core. The valve core has a valve core hole. The outer circumferential surface of the shaft has a sliding groove, and the sliding groove includes a helical curve portion. A sliding pin is fixedly connected to the valve seat, and the sliding pin is correspondingly disposed in the sliding groove; The spiral curve section is configured such that when the valve body moves axially relative to the valve seat, the valve body also rotates circumferentially relative to the valve seat to adjust the opening of the valve core hole.

2. The valve as described in claim 1, characterized in that, The groove also includes a straight section that connects with the spiral curve section, the straight section extending in the axial direction.

3. The valve as described in claim 2, characterized in that, The straight section is connected to both ends of the spiral curve section.

4. The valve as described in claim 2, characterized in that, The extension length of the straight portion is 1 to 30 mm.

5. The valve as described in claim 1, characterized in that, The valve seat and / or valve core are equipped with heating elements.

6. The valve as described in claim 1, characterized in that, The valve core is truncated cone-shaped.

7. The valve as claimed in claim 1, characterized in that, The valve core and / or valve seat are made of graphite.

8. The valve as claimed in claim 1, characterized in that, The valve core and / or valve seat have a graphite layer on the surfaces that come into contact with zinc vapor.

9. The valve as described in any one of claims 1-8, characterized in that, The valve core includes a body and a sealing block located beside the body, the sealing block being configured to float axially relative to the body.

10. The valve as claimed in claim 7 or 8, characterized in that, The density of the graphite or graphite layer is ≥1.75 g / cm³. 3 The coefficient of thermal expansion is ≤4.3×10. -6 / ℃, impedance ≥1550μΩcm, porosity <10%, thermal conductivity ≤85W / m·℃.

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