Molten salt gauge valve
By improving the structural design of the molten salt instrument valve, adopting a Y-type valve body, conical and spherical seals, multi-layer packing, and universal pin connection, the problems of high flow resistance and poor sealing performance of traditional molten salt instrument valves have been solved. This has achieved higher flow capacity and sealing performance, reduced replacement costs, and met the precise flow control and monitoring requirements of molten salt systems.
Patent Information
- Application Number
- CN202422990689.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Traditional molten salt instrument valves suffer from problems such as high flow resistance, poor sealing, limited adaptability, and poor corrosion resistance of packing, making it difficult to meet the precise flow control and monitoring requirements of modern molten salt systems.
It adopts a Y-type valve body structure, conical and spherical sealing structure, multi-layer corrosion-resistant packing assembly and universal pin connection, combined with raised face flange connection, to improve fluid flow capacity and sealing performance.
It reduces fluid resistance, improves sealing and adaptability, lowers replacement costs, enables real-time parameter monitoring, and facilitates connection with different testing instruments.
Smart Images
Figure CN223768132U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a molten salt instrument valve, belonging to the field of molten salt valves. Background Technology
[0002] A molten salt instrument valve is a type of instrument valve specifically designed for molten salt systems. Modern molten salt systems require precise flow control and monitoring; therefore, the instrument valve should be easily connected to various measuring instruments to achieve real-time parameter monitoring.
[0003] Traditional instrument valves use a T-type structure, resulting in high flow resistance; the valve body and seat use a surface sealing structure, which has poor sealing performance; the outlet and inlet use a welded structure, which has limited adaptability; and the packing uses a simple graphite structure, which is not resistant to corrosion and cannot be used in molten salt systems. Summary of the Invention
[0004] To address the shortcomings of the aforementioned technologies, this invention provides a novel molten salt shut-off valve structure that reduces flow resistance, minimizes sealing force, improves sealing performance, prevents valve stem self-rotation, and reduces the cost and time of instrument replacement.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The valve body adopts a Y-shaped structure, the valve body sealing surface adopts a conical structure after processing, and the valve disc sealing surface adopts a spherical structure after processing, thereby realizing a line sealing structure. The corrosion-resistant molten salt packing assembly is divided into 3 layers of stuffing box, 3 layers of molded ring, and 3 layers of non-metallic gasket from top to bottom. The outlet adopts a raised flange connection, and the valve disc and valve stem are connected by a universal pin. The valve disc is provided with a through pin hole.
[0006] It includes the valve body inlet (1), valve body outlet (2), valve disc (3), valve stem (4), valve cover (5), corrosion-resistant packing assembly (6), etc. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the molten salt instrument valve structure.
[0008] Figure 2 This is a schematic diagram of the sealing surface structure of a molten salt instrument valve.
[0009] Figure 3 This is a schematic diagram of the corrosion-resistant filler assembly structure.
[0010] Figure 4 This is a schematic diagram of the connection between the valve disc and the valve stem.
[0011] Figure 1 The components are: 1. Valve body inlet, 2. Valve body outlet, 3. Valve disc, 4. Valve stem, 5. Valve cover, and 6. Corrosion-resistant packing assembly. Detailed Implementation
[0012] The molten salt instrument valve body adopts a Y-shaped structure, with the center line of the central cavity forming an angle of 35° to 55° with the center line of the inlet and outlet. This reduces the change of fluid direction, thereby reducing fluid resistance, reducing wear, and improving fluid flow capacity. Compared with the T-shaped structure, it is more open, less prone to the accumulation of molten salt particles, and less likely to cause blockage. The outlet side of the valve body is connected by a raised face flange.
[0013] The beneficial effects of this utility model are: the valve body outlet flange connection structure described above can be applied to different types of detection instruments, making it easy to replace pressure gauges, bimetallic thermometers, thermocouples, etc., so as to achieve real-time monitoring of different parameters.
[0014] exist Figure 2 In the example shown, the valve body directly welds the sealing surface. After machining, the valve body sealing surface adopts a conical structure, and the valve disc sealing surface adopts a spherical structure, thus forming a line sealing structure and a universal structure. Due to the small contact area of the sealing surface, the pressure applied to the contact line is more concentrated. In addition, even if the sealing surface is worn, a good sealing effect can still be achieved by adjusting the spherical structure of the valve disc itself.
[0015] exist Figure 3 In the example shown, the molten salt packing consists of (from top to bottom) three layers of stuffing boxes, three layers of molded rings, and three layers of non-metallic gaskets. The non-metallic gaskets are made of antioxidant flexible graphite, offering better resistance to thermal weight loss, and employ a cup-shaped structure for excellent sealing performance, resisting most chemical media. The molded rings are made of martensitic stainless steel, possessing very high dimensional accuracy and consistency, thus ensuring effective sealing in the equipment. The stuffing boxes are made of high-quality fiber material and contain lubricants and other additives, providing excellent sealing and wear resistance, maintaining a stable sealing effect during high-frequency operation. Figure 4 In the example shown, the valve disc and valve stem are connected by a universal pin. The valve disc is provided with a through-hole for the pin, which can effectively prevent the valve disc from rotating on its own. Compared with the traditional instrument valve welding method, the pin connection design has lower manufacturing cost and facilitates the maintenance and replacement of the valve disc and valve stem.
Claims
1. A fused salt instrument valve, which is mainly composed of a valve body inlet (1), a valve body outlet (2), a valve clack (3), a valve stem (4), a valve cover (5), a corrosion-resistant packing assembly (6), characterized in that: The valve body is directly built up with a sealing surface, the valve body comprises an inlet (1), an outlet (2) and a middle cavity, the middle cavity center line is inclined to the inlet and outlet center line at an angle of 35-55 degrees, and the valve body appears Y-shaped structure; the valve body inlet (1) is connected with the molten salt system pipeline by welding, and the valve body outlet (2) is connected with the instrument by flange.
2. A fused salt instrument valve according to claim 1, characterised in that: The outlet flange adopts convex flange.
3. A fused salt instrument valve according to claim 1 wherein: The valve disc and the valve rod are connected by a universal pin shaft, and the valve disc is provided with a pin shaft hole.
4. A fused salt instrument valve according to claim 1 wherein: The valve body sealing surface is processed into a conical surface, and the valve disc sealing surface is processed into a spherical surface.