High-temperature lead-bismuth liquid alloy electric control valve

Abstract

The utility model discloses a high-temperature lead bismuth liquid alloy electric control valve which comprises a valve body, a liquid inlet hole and a liquid outlet hole are formed in the two ends of the valve body respectively, and a valve seat is arranged between the liquid inlet hole and the liquid outlet hole. A valve cover is installed at the top end of the valve body, a valve rod is vertically arranged on the valve cover in a sliding penetrating and sealing mode and penetrates through a cover body of the valve cover, a valve element is installed at the lower end of the valve rod, and the valve element is matched with the valve seat in a sliding and sealing mode. The sealing cylinder is coaxially arranged on the outer side of the valve element in a sliding and sealing mode, and the valve element and the sealing cylinder are matched with the valve seat to form a multi-stage sealing structure; and the driving mechanism is installed at the top of the valve rod and used for driving the valve element to move up and down to be matched with the valve seat to adjust the flow of the liquid alloy in the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control valves, in particular to an electric control valve for high-temperature lead-bismuth liquid alloy. Background Technique

[0002] In the transportation and control system of high-temperature liquid alloy (such as lead-bismuth alloy, etc.), as a key control element, the sealing performance and durability of the electric control valve are directly related to the safe and stable operation of the whole system. During the switching operation of the traditional electric control valve for high-temperature lead-bismuth liquid alloy, the high-temperature lead-bismuth liquid alloy will have a strong scouring and corrosion effect on the valve core. The valve core that has been exposed to such a harsh environment for a long time is prone to scouring and corrosion on its surface sealing surface, resulting in a decrease in dimensional accuracy, and further affecting the sealing performance and service life of the electric control valve for high-temperature lead-bismuth liquid alloy.

[0003] Therefore, it is necessary to provide an electric control valve for high-temperature lead-bismuth liquid alloy to solve the problems mentioned in the above background technique. Summary of the Invention

[0004] To achieve the above object, the utility model provides the following technical solution: An electric control valve for high-temperature lead-bismuth liquid alloy, comprising: a valve body, with a liquid inlet hole and a liquid outlet hole respectively arranged at both ends of the valve body, and a valve seat is arranged between the liquid inlet hole and the liquid outlet hole; a valve cover is installed at the top of the valve body, a valve rod is vertically and slidably penetrated and sealed through the cover body of the valve cover, a valve core is installed at the lower end of the valve rod, and the valve core is slidably and sealingly matched with the valve seat;

[0005] A sealing cylinder, the sealing cylinder is coaxially and slidably sealed outside the valve core, and the valve core and the sealing cylinder cooperate with the valve seat to form a multi-stage sealing structure;

[0006] A driving mechanism, the driving mechanism is installed at the top of the valve rod and is used to drive the valve core to move up and down to cooperate with the valve seat to adjust the flow rate of the liquid alloy in the valve body.

[0007] Preferably, an installation seat is fixedly arranged at the top of the valve cover, the driving mechanism is installed at the top of the installation seat, the valve rod is slidably arranged in the installation seat, sealing packing is arranged on the periphery of the valve rod in the installation seat, and the valve rod is coaxially connected with the output end of the driving mechanism.

[0008] Preferably, an annular sliding table is arranged on the periphery of the top end of the valve core, a ring groove is opened in the middle of the inner side of the sealing cylinder, and the annular sliding table is slidably matched with the ring groove.

[0009] Preferably, a first sealing surface is provided on the circumferential side of the valve body below the valve cover, and a second sealing surface is provided on the circumferential side of the top end of the valve seat. The first sealing surface and the second sealing surface can respectively cooperate with the sealing cylinder to form a sealing structure.

[0010] Preferably, a pressure monitoring unit is provided at the connection between the top of the valve stem and the driving mechanism.

[0011] Preferably, the height of the valve core is less than or equal to the distance between the top of the annular groove and the bottom of the sealing cylinder.

[0012] Preferably, the height of the sealing cylinder is greater than the distance from the lower end of the first sealing surface to the second sealing surface.

[0013] Preferably, the matrixes of the valve core and the sealing cylinder are both nickel-based superalloys, and a protective coating is provided on the surface.

[0014] Preferably, elastic sealing rings are installed at both the upper and lower ends of the annular groove.

[0015] Compared with the prior art, the present utility model provides a high-temperature lead-bismuth liquid alloy electric control valve, which has the following beneficial effects:

[0016] In the present utility model, by slidably and sealingly sleeving a sealing cylinder outside the valve core, when the valve is opened or closed, a multi-stage sealing structure is provided at the valve stem or the valve seat, improving the sealing and throttling performance of the valve body, preventing high-temperature liquid alloy from leaking and causing safety accidents; at the same time, by providing a sealing cylinder outside the valve core, the valve core can be continuously protected when the valve is opened or closed, preventing the high-temperature liquid alloy from scouring and corroding the sealing surface of the valve core and improving the service life of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic front sectional view of the overall structure of a high-temperature lead-bismuth liquid alloy electric control valve;

[0018] Figure 2 is a schematic view of the structure of a high-temperature lead-bismuth liquid alloy electric control valve in the open state;

[0019] Figure 3 is a schematic view of the structure of a high-temperature lead-bismuth liquid alloy electric control valve in the closed state;

[0020] In the figure: 1, valve body; 2, valve cover; 3, valve core; 4, sealing cylinder; 5, valve seat; 6, valve stem; 7, driving mechanism; 8, mounting seat; 9, sealing packing; 10, annular groove; 11, annular sliding table; 12, first sealing surface; 13, second sealing surface; 14, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Please refer toFigures 1-3 , the present utility model provides a high-temperature lead-bismuth liquid alloy electric control valve, including:

[0022] A valve body 1, with a liquid inlet hole and a liquid outlet hole respectively arranged at both ends of the valve body 1, and a valve seat 5 is arranged between the liquid inlet hole and the liquid outlet hole; a valve cover 2 is installed at the top of the valve body 1, and a valve rod 6 is vertically and slidably penetrated and sealed through the cover body of the valve cover 2. A valve core 3 is installed at the lower end of the valve rod 6, and the valve core 3 is slidably and sealingly matched with the valve seat 5;

[0023] A sealing cylinder 4, which is coaxially and slidably sealed outside the valve core 3. The valve core 3 and the sealing cylinder 4 cooperate with the valve seat 5 to form a multi-stage sealing structure;

[0024] A driving mechanism 7, which is installed at the top of the valve rod 6 and is used to drive the valve core 3 to move up and down to cooperate with the valve seat 5 to adjust the flow rate of the liquid alloy in the valve body 1. The driving mechanism 7 is a linear motor.

[0025] It should be explained that during use, the valve core 3 and the sealing cylinder 4 are driven by the driving mechanism 7 to move up and down to open or close the valve. A multi-stage sealing structure is formed by the cooperation of the valve core 3 and the sealing cylinder 4 with the valve seat 5 to improve the sealing performance of the electric control valve and prevent liquid alloy leakage; at the same time, the sealing surface of the valve core 3 is protected by the sealing cylinder 4 to avoid being directly scoured and corroded by the liquid alloy, thereby improving the service life of the valve core 3.

[0026] Further, an installation seat 8 is fixedly provided at the top of the valve cover 2, the driving mechanism 7 is installed at the top of the installation seat 8, the valve rod 6 is slidably arranged in the installation seat 8, a sealing packing 9 is arranged on the periphery of the valve rod 6 in the installation seat 8, and the valve rod 6 is coaxially connected to the output end of the driving mechanism 7 to prevent liquid alloy in the valve body 1 from leaking from the valve rod 6.

[0027] Further, an annular sliding table 11 is arranged on the periphery of the top end of the valve core 3, a ring groove 10 is opened in the middle of the inner side of the sealing cylinder 4, and the annular sliding table 11 is slidably matched with the ring groove 10. Through the arrangement of the annular sliding table 11, when the valve core 3 moves upward, it can retract into the sealing cylinder 4 to avoid the liquid alloy directly scouring and corroding the sealing surface of the valve core 3 and improve its service life.

[0028] Further, a first sealing surface 12 is provided on the circumferential side of the valve body 1 below the valve cover 2, and a second sealing surface 13 is provided on the circumferential side of the top end of the valve seat 5. The first sealing surface 12 and the second sealing surface 13 can respectively cooperate with the sealing cylinder 4 to form a sealing structure, so that when the valve is opened or closed, a multi-stage sealing structure can be formed at the valve stem 6 and the valve body 1 or the valve core 3 and the valve seat 5, improving the sealing performance of the regulating valve.

[0029] Further, a pressure monitoring unit is provided at the connection between the top of the valve stem 6 and the driving mechanism 7 for real-time detection of the contact pressure between the valve core 3 and the valve seat 5.

[0030] Further, the height of the valve core 3 is less than or equal to the distance between the top of the annular groove 10 and the bottom of the sealing cylinder 4.

[0031] Specifically, as Figure 2 shown, when the valve is opened under the drive of the driving mechanism 7, the valve core 3 is located inside the sealing cylinder 4, which can effectively avoid the direct scouring corrosion of the valve core 3 by the liquid alloy and improve the service life of the valve core 3; in addition, a sealing structure is formed by the cooperation of the outer peripheral wall of the sealing cylinder 4 and the first sealing surface 12. At the same time, the valve stem 6 and the sealing packing 9 form a second sealing structure to prevent the liquid alloy from leaking out from the valve stem 6, improving the sealing performance of the regulating valve.

[0032] Further, the height of the sealing cylinder 4 is greater than the distance from the lower end of the first sealing surface 12 to the second sealing surface 13 and is not less than 2 cm.

[0033] Specifically, as Figure 3 shown, when the valve is closed under the drive of the driving mechanism 7, the valve core 3 is located in the valve seat 5, and the two form a sealing structure; at the same time, due to the continuous pressure applied by the driving mechanism 7 on the valve core 3, the annular sliding table 11 cooperates with the annular groove 10, so that the sealing cylinder 4 tightly presses against the second sealing surface 13, constituting a second sealing structure to prevent the liquid alloy from leaking downstream from the valve seat 5 and improving the sealing performance of the regulating valve at the valve seat 5.

[0034] Further, the bases of the valve core 3 and the sealing cylinder 4 are both nickel-based superalloys, and a protective coating is provided on the surface. The components of the protective coating include at least one of Cr3C2-NiCr and Al2O3.

[0035] Further, elastic sealing rings 14 are installed at both the upper and lower ends of the annular groove 10.

[0036] It should be noted that when the valve core 3 moves up and down, the sealing ring 14 is squeezed, and when the valve is opened or closed, the sealing between the valve core 3 and the sealing cylinder 4 is realized. The preparation material of the sealing ring 14 is fluororubber, polyimide, etc.

[0037] During specific implementation, the valve core 3 and the sealing cylinder 4 are driven by the driving mechanism 7 to move up and down to open or close the valve. A multi-stage sealing structure is formed by the cooperation of the valve core 3, the sealing cylinder 4 and the valve seat 5 to improve the sealing performance of the regulating valve and avoid the leakage of liquid alloy. At the same time, the sealing cylinder 4 protects the valve core 3 from being directly eroded by the liquid alloy, thereby prolonging the service life of the valve core 3.

[0038] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover the equivalent replacement or change made according to the technical solution and the inventive concept of the present invention within the protection scope of the present invention.

Claims

1. A high-temperature lead-bismuth liquid alloy electric regulating valve, characterized in that: include: A valve body (1), wherein both ends of the valve body (1) are respectively provided with a liquid inlet hole and a liquid outlet hole, and a valve seat (5) is provided between the liquid inlet hole and the liquid outlet hole; a valve cover (2) is installed at the top end of the valve body (1), and a valve stem (6) is provided on the valve cover (2) and vertically slides through the cover body and seals the valve stem (6); a valve core (3) is installed at the lower end of the valve stem (6), and the valve core (3) and the valve seat (5) are slidably and sealably matched; A sealing cylinder (4), wherein the sealing cylinder (4) is coaxially slidably sealed and arranged on the outside of the valve core (3), and the valve core (3) and the sealing cylinder (4) cooperate with the valve seat (5) to form a multi-stage sealing structure; A drive mechanism (7) is mounted on the top of the valve stem (6) and is used to drive the valve core (3) to move up and down to cooperate with the valve seat (5) to adjust the flow rate of the liquid alloy in the valve body (1).

2. A high temperature lead-bismuth liquid alloy electric regulating valve according to claim 1, characterized in that: A mounting seat (8) is fixedly provided on the top of the valve cover (2), the driving mechanism (7) is mounted on the top of the mounting seat (8), the valve stem (6) is slidably arranged in the mounting seat (8), a sealing packing (9) is arranged in the mounting seat (8) on the circumference of the valve stem (6), and the valve stem (6) is coaxially connected to the output end of the driving mechanism (7).

3. The high-temperature lead-bismuth liquid alloy electric regulating valve according to claim 1, characterized in that: An annular slide (11) is provided on the circumferential side of the top end of the valve core (3), an annular groove (10) is provided in the middle of the inner side of the sealing cylinder (4), and the annular slide (11) is slidably matched with the annular groove (10).

4. A high temperature lead-bismuth liquid alloy electric regulating valve according to claim 3, characterized in that: A first sealing surface (12) is provided on the circumferential side below the valve cover (2) in the valve body (1), and a second sealing surface (13) is provided on the circumferential side of the top end of the valve seat (5). The first sealing surface (12) and the second sealing surface (13) can respectively cooperate with the sealing cylinder (4) to form a sealing structure.

5. The high temperature lead-bismuth liquid alloy electric regulating valve according to claim 1, characterized in that: A pressure monitoring unit is provided at the connection between the top of the valve stem (6) and the driving mechanism (7).

6. A high temperature lead-bismuth liquid alloy electric regulating valve according to claim 4, characterized in that: The height of the valve core (3) is less than or equal to the distance between the top of the annular groove (10) and the bottom of the sealing cylinder (4).

7. The high temperature lead-bismuth liquid alloy electric regulating valve according to claim 4, characterized in that: The height of the sealing cylinder (4) is greater than the distance from the lower end of the first sealing surface (12) to the second sealing surface (13).

8. The high temperature lead-bismuth liquid alloy electric regulating valve according to claim 1, characterized in that: The base bodies of the valve core (3) and the sealing cylinder (4) are both made of nickel-based high-temperature alloy, and a protective coating is provided on the surface.

9. The high-temperature lead-bismuth liquid alloy electric regulating valve according to claim 6, characterized in that: Elastic sealing rings (14) are installed at both upper and lower ends of the annular groove (10).

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