A melt salt use stop valve

Abstract

The utility model discloses a kind of stop valves for fused salt, including valve body, valve seat, sleeve, valve cover, heating device, upper valve cover, guide sleeve, sealing gasket, packing assembly, press plate, stand, bracket assembly, hand wheel, valve stem, valve core and bellows, the valve seat is installed in the valve body inside, the sealing gasket is tightly installed between the valve seat bottom end and valve body, sleeve is installed on the valve seat upper side, the valve cover is fixedly connected with the valve body upper end by bolt on the valve body upper end, the valve cover bottom end is tightly on the sleeve upper end, and sealing gasket is installed between the valve cover bottom end and the valve body upper end, the valve cover is equipped with heating device outside, the upper valve cover is fixedly connected with the valve cover top end by bolt, guide sleeve is fixedly installed at the inside connection of the valve cover and upper valve cover. The utility model is scientific and reasonable in structure, and good in installation and use performance, low in manufacturing cost, and strong in practicality.

Description

Technical Field

[0001] This utility model relates to a stop valve, specifically a stop valve for molten salt. Background Technology

[0002] Currently, most molten salt gate valves have a non-removable seat structure. The temperature at the top of the valve cover is lower than that of the middle cavity, making it prone to crystallization. This is especially true for molten salt media, where the sealing surface is most susceptible to crystallization and wear. The valve stem is also prone to crystallization, which can damage the packing and cause external leakage. If the valve seat sealing surface is severely damaged, it needs to be cut off and welded for repair, or the valve needs to be replaced. This results in high maintenance costs and long maintenance times. Therefore, I propose a gate valve for molten salt media. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gate valve for molten salt, which solves the problem that most current gate valves for molten salt have a non-removable valve seat structure, which makes the sealing surface of the molten salt medium most prone to crystallization and wear; the valve stem is also prone to crystallization, which can damage the packing and cause external leakage risk.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a stop valve for molten salt, comprising a valve body, a valve seat, a sleeve, a valve cover, a heating device, an upper valve cover, a guide sleeve, a sealing gasket, a packing assembly, a pressure plate, a column, a support assembly, a handwheel, a valve stem, a valve core, and a bellows. A valve seat is installed inside the valve body, and a sealing gasket is pressed between the bottom end of the valve seat and the valve body. A sleeve is installed above the valve seat. A valve cover is bolted to the upper end of the valve body, and the bottom end of the valve cover is pressed against the upper end of the sleeve. A sealing gasket is installed between the bottom end of the valve cover and the upper end of the valve body. A heating device is fitted outside the valve cover. An upper valve cover is bolted to the top of the valve cover. A guide sleeve is fixedly installed at the internal connection between the valve cover and the upper valve cover. The upper and lower ends of the external boss of the guide sleeve... Sealing gaskets are installed at the connection points of the valve cover and the upper valve cover. A packing assembly is installed inside the top of the upper valve cover. A pressure plate is provided above the packing assembly. The pressure plate is fixedly connected to the top of the upper valve cover by bolts, and the upper valve cover is pressed against the packing assembly. A column is symmetrically threaded to the outer side of the top of the upper valve cover. A bracket assembly is fixedly connected to the top of the column by bolts. A handwheel is rotatably connected to the inner side of the upper part of the bracket assembly. A bearing is installed at the rotatable connection between the handwheel and the bracket assembly. A valve stem is movably installed inside the valve body. A valve core is fixedly connected to the bottom end of the valve stem. The upper end of the valve stem passes through the valve cover, the upper valve cover, the pressure plate, and the bracket assembly, and the top end is threaded to the handwheel. A bellows is sleeved on the upper end of the valve stem above the valve core. The upper end of the bellows is pressed against the guide sleeve.

[0005] Based on the above solution, the sealing gasket is made of rubber.

[0006] Based on the above scheme, an anti-rotation key is installed on the valve stem at the position of the guide sleeve, and a keyway matching the anti-rotation key is opened on the guide sleeve, and the anti-rotation key slides in conjunction with the keyway.

[0007] Based on the above scheme, an anti-rotation plate is fixedly connected to the outside of the valve stem at the position of the column, and the two ends of the anti-rotation plate are respectively slidably engaged with the outside of the column.

[0008] Based on the above scheme, the valve stem is slidably engaged with the guide sleeve, packing assembly, pressure plate and bracket assembly, and is slidably sealed with the packing assembly.

[0009] Compared with the prior art, the advantages of this utility model are as follows: A molten salt gate valve adopts a detachable valve seat design, allowing continued use simply by replacing the valve seat and valve core. Maintenance is convenient, online repair is possible, and operating costs are reduced. A bellows is added to the valve stem, preventing the medium from passing between the valve stem and packing, thus minimizing the risk of external leakage. A heating device is added to the valve cover to prevent the possibility of medium pre-cooling and crystallization, preventing crystallization at the upper end of the valve stem and ensuring the sealing performance of the packing assembly. Bearings are added inside the support assembly, eliminating the need for other auxiliary tools when opening and closing the valve with a small amount of force. This utility model has a scientifically sound and reasonable structure, good installation and performance, low manufacturing cost, and strong practicality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a shut-off valve for molten salt according to the present invention;

[0011] Figure 2 This is a partial structural diagram of the upper end of a shut-off valve for molten salt according to the present invention;

[0012] Figure 3 This is a partial structural diagram of the lower end of a shut-off valve for molten salt according to the present invention;

[0013] Figure 4 This is a partial structural diagram of the valve stem of a gate valve for molten salt according to this utility model.

[0014] The numbers in the diagram are: 1-valve body, 2-valve seat, 3-sleeve, 4-valve cover, 5-heating device, 6-upper valve cover, 7-guide sleeve, 8-sealing gasket, 9-packing assembly, 10-pressure plate, 11-column, 12-bracket assembly, 13-handwheel, 14-valve stem, 15-valve core, 16-bellows, 17-anti-rotation key, 18-anti-rotation plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Reference Figures 1 to 4It is known that a molten salt gate valve includes a valve body 1, a valve seat 2, a sleeve 3, a valve cover 4, a heating device 5, an upper valve cover 6, a guide sleeve 7, a sealing gasket 8, a packing assembly 9, a pressure plate 10, a column 11, a support assembly 12, a handwheel 13, a valve stem 14, a valve core 15, and a bellows 16. The valve seat 2 is installed inside the valve body 1, and a sealing gasket 8 is pressed between the bottom end of the valve seat 2 and the valve body 1. A sleeve 3 is installed above the valve seat 2. A valve cover 4 is bolted to the upper end of the valve body 1, and the bottom end of the valve cover 4 is pressed against the upper end of the sleeve 3. A sealing gasket 8 is installed between the valve cover 4 and the upper end of the valve body 1. A heating device 5 is fitted on the outside of the valve cover 4. The heating device 5 is an existing mature technology product used to heat the valve cover 6. The top of the valve cover 4 is fixedly connected to the upper valve cover 6 by bolts. A guide sleeve 7 is fixedly installed at the internal connection between the valve cover 4 and the upper valve cover 6. Sealing gaskets 8 are respectively installed at the upper and lower ends of the external boss of the guide sleeve 7 at the connection between the valve cover 4 and the upper valve cover 6. A packing assembly 9 is installed inside the top of the upper valve cover 6. A pressure plate 10 is provided above the packing assembly 9. The pressure plate 10 is fixed by bolts. A fixed connection is made to the top of the upper valve cover 6, and the upper valve cover 6 is pressed tightly onto the packing assembly 9. A column 11 is symmetrically threaded onto the outer side of the top of the upper valve cover 6. A bracket assembly 12 is fixedly connected to the top of the column 11 by bolts. A handwheel 13 is rotatably connected to the inner side of the upper part of the bracket assembly 12. A bearing is installed at the rotatable connection between the handwheel 13 and the bracket assembly 12. The bearing reduces the friction of the handwheel 13 rotating within the bracket assembly 12, facilitating handwheel rotation without the need for other auxiliary tools. A valve stem 14 is movably installed inside the valve body 1, and a fixed connection is made to the bottom end of the valve stem 14. The valve core 15 and the upper end of the valve stem 14 pass through the valve cover 4, the upper valve cover 6, the pressure plate 10 and the bracket assembly 12, and the top end is connected to the handwheel 13 by a thread. When the handwheel 13 is rotated, the valve stem 14 is restricted by the anti-rotation plate 18 and the anti-rotation key 17 and cannot rotate. It can only move up and down under the action of the thread. A bellows 16 is sleeved on the upper end of the valve core 15 outside the valve stem 14. The upper end of the bellows 16 is pressed against the guide sleeve 7. The bellows 16 is sleeved on the outside of the valve stem 14 to prevent the liquid from contacting the valve stem 14 and to prevent crystal formation caused by the valve stem 14 contacting the liquid.

[0018] The sealing gasket 8 is made of rubber, which has excellent sealing properties. An anti-rotation key 17 is installed on the valve stem 14 at the position of the guide sleeve 7. A keyway matching the anti-rotation key 17 is provided on the guide sleeve 7. The anti-rotation key 17 slides in conjunction with the keyway, preventing the valve stem 14 from rotating during upward and downward movement. An anti-rotation plate 18 is fixedly connected to the outside of the valve stem 14 at the position of the column 11. Both ends of the anti-rotation plate 18 slide in conjunction with the outside of the column 11. The anti-rotation plate 18 prevents the valve stem 14 from rotating and also positions the valve stem 14 during its movement. The valve stem 14 slides in conjunction with the guide sleeve 7, the packing assembly 9, the pressure plate 10, and the support assembly 12. This sliding contact facilitates the valve stem 14's up-and-down movement within the valve, opening and closing it. It also provides a sliding seal with the packing assembly 9, preventing leakage during the valve stem 14's up-and-down movement.

[0019] The principle and advantages of this utility model are as follows: A molten salt gate valve adopts a detachable valve seat 2 design. When the valve seat 2 seal fails, only the valve seat 2 and valve core 15 need to be replaced to continue use, which is convenient for maintenance and can be repaired online, reducing the cost of use. A bellows 16 is added to the valve stem 14 so that the valve stem 14 and the packing assembly 9 do not pass through the medium, thus preventing damage to the seal between the valve stem 14 and the packing assembly 9 and reducing the risk of external leakage. A heating device 5 is added to the valve cover 4 so that the temperature of the upper end of the valve cover 4 is not lower than that of the middle cavity, which can prevent the possibility of medium pre-cooling crystallization and prevent crystallization at the upper end of the valve stem 14, which could damage the sealing performance of the packing assembly 9. A bearing is added inside the support assembly 12. When the handwheel 13 is used to open and close the valve, it has good rotation and low friction. No other auxiliary tools are needed to open and close the valve. Only a small force is required to open and close the valve. This utility model has a scientific and reasonable structure, good operability, low manufacturing cost, and is suitable for widespread use.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shut-off valve for molten salt, comprising a valve body (1), a valve seat (2), a sleeve (3), a valve cover (4), a heating device (5), an upper valve cover (6), a guide sleeve (7), a sealing gasket (8), a packing assembly (9), a pressure plate (10), a column (11), a support assembly (12), a handwheel (13), a valve stem (14), a valve core (15), and a bellows (16), characterized in that: A valve seat (2) is installed inside the valve body (1). A sealing gasket (8) is pressed between the bottom end of the valve seat (2) and the valve body (1). A sleeve (3) is installed above the valve seat (2). A valve cover (4) is fixedly connected to the upper end of the valve body (1) by bolts. The bottom end of the valve cover (4) is pressed against the upper end of the sleeve (3), and a sealing gasket (8) is installed between the bottom end of the valve cover (4) and the upper end of the valve body (1). A heating element is fitted on the outside of the valve cover (4). The device (5) has an upper valve cover (6) fixedly connected to the top of the valve cover (4) by bolts. A guide sleeve (7) is fixedly installed at the internal connection between the valve cover (4) and the upper valve cover (6). Sealing gaskets (8) are installed at the upper and lower ends of the outer boss of the guide sleeve (7) and the connection between the valve cover (4) and the upper valve cover (6). A packing assembly (9) is installed inside the top of the upper valve cover (6). A pressure plate (10) is provided above the packing assembly (9). The pressure plate (10) is fixedly connected to the top of the upper valve cover (6) by bolts, and the upper valve cover (6) is pressed against the packing assembly (9). A column (11) is symmetrically threaded to the outer side of the top of the upper valve cover (6). A bracket assembly (12) is fixedly connected to the top of the column (11) by bolts. A handwheel (13) is rotatably connected to the inner side of the upper part of the bracket assembly (12). A bearing is installed at the rotatable connection between the handwheel (13) and the bracket assembly (12). A valve stem (14) is movably installed inside the valve body (1). A valve core (15) is fixedly connected to the bottom end of the valve stem (14). The upper end of the valve stem (14) passes through the valve cover (4), the upper valve cover (6), the pressure plate (10), and the bracket assembly (12). The top end is connected to the handwheel (13) by a thread. A bellows (16) is sleeved on the upper end of the valve core (15) outside the valve stem (14). The upper end of the bellows (16) is pressed against the guide sleeve (7).

2. The shut-off valve for molten salt according to claim 1, characterized in that, The sealing gasket (8) is made of rubber.

3. A shut-off valve for molten salt according to claim 1, characterized in that, The valve stem (14) is equipped with an anti-rotation key (17) at the position of the guide sleeve (7). The guide sleeve (7) has a keyway that matches the anti-rotation key (17), and the anti-rotation key (17) slides in conjunction with the keyway.

4. A shut-off valve for molten salt according to claim 1, characterized in that, An anti-rotation plate (18) is fixedly connected to the valve stem (14) at the position of the column (11), and the two ends of the anti-rotation plate (18) are respectively slidably engaged with the outside of the column (11).

5. A shut-off valve for molten salt according to claim 1, characterized in that, The valve stem (14) is in sliding engagement with the guide sleeve (7), the packing assembly (9), the pressure plate (10) and the bracket assembly (12), and is in sliding sealing engagement with the packing assembly (9).

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