High-temperature-resistant metal sealing butterfly valve

Abstract

The utility model relates to the technical field of sealing butterfly valves, and discloses a high-temperature-resistant metal sealing butterfly valve which comprises a valve seat, a connecting plate is fixedly connected to the outer wall of the valve seat, a threaded rod is slidably connected to the interior of the connecting plate, a rotating ring is in threaded connection to the outer wall of the threaded rod, and a fixing ring is fixedly connected to the outer wall of the threaded rod. A sliding shaft is slidably connected into the threaded rod, a ball is attached to the outer wall of the sliding shaft, a fixing block is rotatably connected to the outer wall of the ball, a supporting shaft is rotatably connected into the fixing block, a reset assembly is arranged on the upper surface of the sliding shaft, and the reset assembly is used for resetting. According to the valve seat, the sliding shaft, the rotating ring, the threaded rod, the supporting shaft, the balls, the fixing block, the traction shaft and the spring are matched with one another, so that the valve seat is convenient to fix or disassemble, a sealing piece is convenient to install, maintain and replace through the two detachable semicircular valve seat structures, and the practicability and the maintenance efficiency of the valve are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealed butterfly valve especially relates to a high temperature resistant metal sealed butterfly valve. BACKGROUND

[0002] The high temperature resistant metal sealed butterfly valve is mainly used for fluid control under high temperature, high pressure and harsh environment. In the traditional butterfly valve design, the sealing surface usually adopts soft sealing materials such as rubber or polytetrafluoroethylene, which can provide better sealing performance, but is easy to age, deform or damage at high temperature. Therefore, a high temperature resistant metal sealed butterfly valve needs to be developed.

[0003] The high temperature resistant metal sealed butterfly valve can maintain stable performance under high temperature environment, ensure that the valve does not deform and damage at high temperature, and maintain good sealing performance and operating performance. In the past technology, the traditional high temperature resistant metal sealed butterfly valve often adopts an integrated valve seat structure, which may need to disassemble the entire valve seat or even the entire valve when maintaining or replacing parts, increasing the complexity and cost of maintenance. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides a high temperature resistant metal sealed butterfly valve, which aims to improve the problem that the entire valve seat or even the entire valve may need to be disassembled when maintaining or replacing parts, increasing the complexity and cost of maintenance.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a high temperature resistant metal sealed butterfly valve, comprising a valve seat, the outer wall of the valve seat is fixedly connected with a connecting plate, the inner part of the connecting plate is slidably connected with a threaded rod, the outer wall of the threaded rod is threadedly connected with a rotating ring, the outer wall of the rotating ring is attached to the outer wall of the connecting plate, the outer wall of the threaded rod is fixedly connected with a fixed ring, the inner part of the threaded rod is slidably connected with a sliding shaft, the outer wall of the sliding shaft is slidably connected in the inner part of the fixed ring, the outer wall of the sliding shaft is attached with a ball, the outer wall of the ball is slidably connected in the inner part of the threaded rod, the outer wall of the ball is rotatably connected with a fixed block, the outer wall of the fixed block is rotatably connected in the inner part of the threaded rod, the inner part of the fixed block is rotatably connected with a support shaft, the outer wall of the support shaft is fixedly connected in the inner part of the threaded rod, the outer wall of the fixed block is attached to the outer wall of the connecting plate, the upper surface of the sliding shaft is provided with a reset assembly, and the reset assembly is used for resetting.

[0006] Preferably, the reset assembly comprises a traction shaft, the upper surface of the traction shaft is fixedly connected to the lower surface of the sliding shaft, the outer wall of the traction shaft is sleeved with a spring, one end of the spring is fixedly connected to the lower surface of the sliding shaft, and the other end of the spring is fixedly connected to the inner wall of the threaded rod.

[0007] Preferably, a valve stem is rotatably connected inside the valve seat, a heat dissipation plate is fixedly connected to the outer wall of the valve stem, and a fixing sleeve is fixedly connected to the outer wall of the valve stem.

[0008] Preferably, a butterfly plate is fixedly connected to the outer wall of the fixed sleeve, and the outer wall of the butterfly plate is rotatably connected to the inner wall of the valve seat.

[0009] Preferably, the valve seat has a high-temperature alloy layer inside, a ceramic layer inside, or a graphite composite layer inside.

[0010] Preferably, the high-temperature alloy layer is made of Hastelloy material.

[0011] Preferably, the ceramic layer is made of silicon carbide material.

[0012] Preferably, the graphite composite layer is made of graphite material and reinforced with reinforcing fibers and metal wires.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the valve seat is easy to fix or disassemble through the mutual cooperation between the sliding shaft, rotating ring, threaded rod, support shaft, ball, fixing block, traction shaft, and spring. The detachable two semi-circular valve seat structure facilitates the installation, maintenance, and replacement of seals, thereby improving the practicality and maintenance efficiency of the valve.

[0015] 2. In this utility model, the innovative use of graphite composite layer, ceramic layer and high temperature alloy layer enables the valve seat to maintain long-term stable performance in high temperature, high pressure and corrosive environment. At the same time, these materials together provide the high temperature sealing performance and mechanical strength required by the valve. Attached Figure Description

[0016] Figure 1 This is a perspective view of a high-temperature resistant metal-sealed butterfly valve proposed in this utility model.

[0017] Figure 2 This is a partial structural diagram of the threaded rod of a high-temperature resistant metal-sealed butterfly valve proposed in this utility model.

[0018] Figure 3 This is a partial structural diagram of the sliding shaft of a high-temperature resistant metal-sealed butterfly valve proposed in this utility model.

[0019] Figure 4 This is a partial structural diagram of the butterfly plate of a high-temperature resistant metal-sealed butterfly valve proposed in this utility model.

[0020] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the valve seat of a high-temperature resistant metal-sealed butterfly valve proposed in this utility model.

[0021] Legend:

[0022] 1. Valve seat; 2. Butterfly plate; 3. Connecting plate; 4. Threaded rod; 5. Rotating ring; 6. Fixed ring; 7. Sliding shaft; 8. Ball bearing; 9. Support shaft; 10. Fixing block; 11. Traction shaft; 12. Spring; 13. Fixing sleeve; 14. Valve stem; 15. Heat sink; 16. High-temperature alloy layer; 17. Graphite composite layer; 18. Ceramic layer. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figure 1 , Figure 2 and Figure 3 One embodiment of this utility model provides a high-temperature resistant metal-sealed butterfly valve, comprising a valve seat 1, a connecting plate 3 fixedly connected to the outer wall of the valve seat 1, a threaded rod 4 slidably connected inside the connecting plate 3, a rotating ring 5 threadedly connected to the outer wall of the threaded rod 4, the outer wall of the rotating ring 5 fitting against the outer wall of the connecting plate 3, a fixing ring 6 fixedly connected to the outer wall of the threaded rod 4, a sliding shaft 7 slidably connected inside the threaded rod 4, the outer wall of the sliding shaft 7 slidably connected inside the fixing ring 6, a ball 8 fitting against the outer wall of the sliding shaft 7, the outer wall of the ball 8 slidably connected inside the threaded rod 4, and a fixed ring 6 rotatably connected to the outer wall of the ball 8. The outer wall of the fixed block 10 is rotatably connected to the inside of the threaded rod 4. The inside of the fixed block 10 is rotatably connected to the support shaft 9. The outer wall of the support shaft 9 is fixedly connected to the inside of the threaded rod 4. The outer wall of the fixed block 10 is attached to the outer wall of the connecting plate 3. The upper surface of the sliding shaft 7 is provided with a reset assembly for resetting. The reset assembly includes a traction shaft 11. The upper surface of the traction shaft 11 is fixedly connected to the lower surface of the sliding shaft 7. The outer wall of the traction shaft 11 is sleeved with a spring 12. One end of the spring 12 is fixedly connected to the lower surface of the sliding shaft 7, and the other end of the spring 12 is fixedly connected to the inner wall of the threaded rod 4.

[0025] Specifically, the valve seat 1 fixes the position of the connecting plate 3, the threaded rod 4 supports the position of the sliding shaft 7, the rotating ring 5 fixes the position of the valve seat 1 by the connecting plate 3, the threaded rod 4 fixes the position of the fixing ring 6, and the fixing ring 6 limits the rotation of the rotating ring 5 to prevent slippage. Simultaneously, pressing the sliding shaft 7 pushes the ball bearing 8 to move within the threaded rod 4. When the sliding shaft 7 slides, the traction shaft 11 drives the spring 12 to compress, and the compression of the spring 12 resets the sliding shaft 7. The movement of the ball bearing 8... The compression fixing block 10 rotates under the support of the support shaft 9, and at the same time, the threaded rod 4 fixes the position of the support shaft 9. Thus, the rotation of the fixing block 10 fixes the position of the connecting plate 3. The cooperation between the rotating ring 5 and the fixing block 10 fixes the two connecting plates 3 together, thereby fixing the position of the valve seat 1. At the same time, when it is necessary to disassemble the valve seat 1, the sliding shaft 7 can be pulled to loosen the position between the two connecting plates 3. So when the valve seat 1 is worn or damaged, only the damaged semi-circular valve seat 1 needs to be replaced, without disassembling the entire valve, which greatly simplifies the maintenance process and reduces maintenance costs.

[0026] Reference Figure 1 A valve stem 14 is rotatably connected inside the valve seat 1. A heat sink 15 is fixedly connected to the outer wall of the valve stem 14. A fixing sleeve 13 is fixedly connected to the outer wall of the valve stem 14. A butterfly plate 2 is fixedly connected to the outer wall of the fixing sleeve 13. The outer wall of the butterfly plate 2 is rotatably connected to the inner wall of the valve seat 1.

[0027] Specifically, the valve stem 14 serves to fix the position of the heat sink 15. The heat sink 15 can effectively reduce the temperature of the valve and reduce the thermal impact of high temperature on these components, thereby extending the service life of the butterfly valve. At the same time, the valve stem 14 fixes the position of the fixing sleeve 13. Thus, when the valve stem 14 rotates, the fixing sleeve 13 drives the butterfly plate 2 to rotate inside the valve seat 1.

[0028] Reference Figure 4 and Figure 5 The valve seat 1 has a high-temperature alloy layer 16, a ceramic layer 18, and a graphite composite layer 17 inside. The high-temperature alloy layer 16 is made of Hastelloy material, the ceramic layer 18 is made of silicon carbide material, and the graphite composite layer 17 is made of graphite material, with reinforcing fibers and metal wires added thereto.

[0029] Specifically, in the high-temperature metal-sealed butterfly valve, the high-temperature alloy layer 16 is made of Hastelloy material, which can significantly improve the valve's corrosion resistance and high-temperature performance, thereby ensuring the valve's stable operation under harsh conditions. In addition, Hastelloy also has good toughness and resistance to stress corrosion cracking, which can further extend the service life of the valve. The ceramic layer 18 is made of silicon carbide material, which can withstand rapid temperature changes and thermal stress impacts. During the operation of the butterfly valve, due to the temperature change of the medium, the ceramic layer 18 needs to withstand the impact of thermal stress. The thermal shock resistance of silicon carbide allows the ceramic layer 18 to maintain structural integrity and prevent cracking caused by thermal stress. The graphite material used in the graphite composite layer 17 has self-lubricating and flexible properties, which can tightly fit the sealing surface of the valve, effectively fill tiny gaps, and achieve a good sealing effect. This characteristic enables the graphite composite layer 17 to maintain stable sealing performance under harsh conditions such as high temperature and high pressure, reducing the risk of leakage.

[0030] Working principle: When it is necessary to fix the valve seat 1 during use, first press the sliding shaft 7 to make it slide inside the threaded rod 4. Then, the sliding of the sliding shaft 7 can drive the traction shaft 11 to slide inside the threaded rod 4 as well. When the traction shaft 11 slides, it can drive the spring 12 to be fixed and compressed inside the threaded rod 4, thereby achieving the function of resetting the sliding shaft 7. At the same time, when the sliding shaft 7 slides to a certain position, it can squeeze the ball bearings 8 inside the threaded rod 4. The compression of the ball bearings 8 can drive the fixing block 10 to rotate under the support of the support shaft 9. Thus, the rotation of the fixing block 10 can... The connecting plate 3 is pressed and fixed, and then the rotating ring 5 on the outer wall of the threaded rod 4 is rotated to press and fix the connecting plate 3 again, thereby fixing the positions of the two valve seats 1. When the valve seats 1 need to be disassembled, the sliding shaft 7 is first pulled to slide inside the threaded rod 4. When the sliding shaft 7 slides, the spring 12 can drive the traction shaft 11 to compress and reset. At the same time, the sliding of the sliding shaft 7 can cause the ball 8 to retract from inside the threaded rod 4 to the outer wall of the sliding shaft 7. The movement of the ball 8 can drive the fixing block 10 to move under the support of the support shaft 9, so that the fixing block 10 can loosen the connecting plate 3. Then the outer wall of the threaded rod 4 is rotated. The rotating ring 5 allows for easy removal of the threaded rod 4 placed inside the connecting plate 3, thus enabling the valve seat 1 to be disassembled. This allows the valve seat 1 to be easily removed from the valve body without the need for complex disassembly of the entire valve. This design not only simplifies the maintenance process and improves work efficiency but also reduces maintenance costs. When the valve seat 1 needs to be replaced due to wear from prolonged use or high-temperature environments, only the semi-circular valve seat 1 needs to be disassembled, without replacing the entire valve. Furthermore, the ceramic layer 18 used in the construction of the valve seat 1 exhibits excellent wear resistance, corrosion resistance, and thermal stability under high-temperature environments, especially when resistance to thermal shock and friction is required. In application, the graphite composite layer 17 exhibits outstanding performance. The graphite material used in the graphite composite layer 17 maintains stable physical and chemical properties even under high-temperature environments. Therefore, the graphite composite layer 17 can operate normally under high-temperature conditions without softening, deforming, or losing its sealing performance due to high temperatures. This is crucial for butterfly valves that need to be used in high-temperature media. Furthermore, the high-temperature strength of the high-temperature alloy layer 16 ensures that the valve can withstand greater pressure and force under high-temperature environments without deformation or damage, thus guaranteeing the stability and reliability of the valve. At the same time, the oxidation resistance of the high-temperature alloy enables it to resist oxidation reactions at high temperatures, extending the service life of the valve.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 high-temperature resistant metal-sealed butterfly valve, comprising a valve seat (1), characterized in that: A connecting plate (3) is fixedly connected to the outer wall of the valve seat (1). A threaded rod (4) is slidably connected inside the connecting plate (3). A rotating ring (5) is threadedly connected to the outer wall of the threaded rod (4). The outer wall of the rotating ring (5) is attached to the outer wall of the connecting plate (3). A fixing ring (6) is fixedly connected to the outer wall of the threaded rod (4). A sliding shaft (7) is slidably connected inside the threaded rod (4). The outer wall of the sliding shaft (7) is slidably connected to the inside of the fixing ring (6). A ball bearing (8) is attached to the outer wall of the sliding shaft (7). The outer wall of the ball (8) is slidably connected to the inside of the threaded rod (4). The outer wall of the ball (8) is rotatably connected to a fixing block (10). The outer wall of the fixing block (10) is rotatably connected to the inside of the threaded rod (4). The inside of the fixing block (10) is rotatably connected to a support shaft (9). The outer wall of the support shaft (9) is fixedly connected to the inside of the threaded rod (4). The outer wall of the fixing block (10) is attached to the outer wall of the connecting plate (3). A reset assembly is provided on the upper surface of the sliding shaft (7). The reset assembly is used for reset.

2. The high-temperature resistant metal-sealed butterfly valve according to claim 1, characterized in that: The reset assembly includes a traction shaft (11), the upper surface of which is fixedly connected to the lower surface of the sliding shaft (7). A spring (12) is sleeved on the outer wall of the traction shaft (11), one end of which is fixedly connected to the lower surface of the sliding shaft (7), and the other end of which is fixedly connected to the inner wall of the threaded rod (4).

3. The high-temperature resistant metal-sealed butterfly valve according to claim 1, characterized in that: The valve seat (1) is rotatably connected to the valve stem (14), the valve stem (14) is fixedly connected to the outer wall of the valve stem (14) and a fixing sleeve (13) is fixedly connected to the outer wall of the valve stem (14).

4. A high-temperature resistant metal-sealed butterfly valve according to claim 3, characterized in that: The outer wall of the fixed sleeve (13) is fixedly connected to the butterfly plate (2), and the outer wall of the butterfly plate (2) is rotatably connected to the inner wall of the valve seat (1).

5. A high-temperature resistant metal-sealed butterfly valve according to claim 1, characterized in that: The valve seat (1) has a high-temperature alloy layer (16) inside, a ceramic layer (18) inside, and a graphite composite layer (17) inside.

6. A high-temperature resistant metal-sealed butterfly valve according to claim 5, characterized in that: The high-temperature alloy layer (16) is made of Hastelloy material.

7. A high-temperature resistant metal-sealed butterfly valve according to claim 5, characterized in that: The ceramic layer (18) is made of silicon carbide material.

8. A high-temperature resistant metal-sealed butterfly valve according to claim 5, characterized in that: The graphite composite layer (17) is made of graphite material and reinforced with fibers and metal wires.

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