Novel double-sealing dome valve

Abstract

The utility model belongs to the technical field of dome valves, and discloses a novel double-sealing type dome valve which comprises a valve body, a connecting shaft installed on the valve body, a valve cover installed on the valve body, a ball center support connected with the connecting shaft and a ball valve connected with the ball center support. And an alloy sealing ring is arranged in the first sliding groove in a sliding mode, a second sliding groove is formed in the bottom face of the alloy sealing ring, a rubber sealing ring is arranged in the second sliding groove in a sliding mode, and a plurality of telescopic rods used for limiting the alloy sealing ring are arranged on the alloy sealing ring. The method has the effect of improving the use experience of workers.

Description

Technical Field

[0001] This utility model relates to the field of dome valve technology, and in particular to a novel double-seal dome valve. Background Technology

[0002] Ordinary ball valves rely on pre-tightening force or fluid pressure to press the valve seat and ball together, causing elastic-plastic deformation of the valve seat material to achieve a seal. Because the valve body and ball are made of metal, while the valve seat is made of soft non-metallic material, when these ball valves are used in cold or hot working environments, the different materials of the valve seat and valve body lead to inconsistent thermal expansion and contraction, which can easily cause leakage or valve malfunction during operation. Dome valves are the most effective and rapidly opening / closing material conveying valves in the world, and are currently the most widely used and best-performing key valves in the ash conveying systems of coal-fired power plants internationally.

[0003] Chinese utility model patent CN215568071U discloses a double-sealed dome valve, including an elastic structure and a piston chamber. The elastic structure includes a connector connecting a ball support and a ball valve, with one end inside the ball support and the other end inside the ball valve. An elastic element is sleeved on the connector and confined within the ball support. The ball valve moves axially, and its range of motion depends on the lengths of the connector and the elastic element. The piston chamber includes a pneumatic connection structure and a sealing structure. The pneumatic connection structure includes a valve body and a connecting shaft, while the sealing structure is connected to the valve body. This utility model, through the addition of an elastic structure, allows the dome valve to open freely without jamming. After closing the valve, a line seal is formed between the ball valve and the piston, preventing material entry and achieving zero leakage.

[0004] Regarding the aforementioned technologies, the inventors believe the following drawbacks exist: The device drives the ball valve to rotate by rotating the connecting shaft, thereby opening and closing the valve body. In actual use, when the medium passing through the valve body is viscous, some of the medium easily adheres to the surface of the ball valve. When the medium dries, it easily forms irregular lumps. At this time, each time the ball valve opens or closes, these lumps of medium squeeze and rub against the sealing and throttling components, causing them to wear and break, resulting in a poor user experience. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a novel double-sealed dome valve.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a novel double-seal dome valve, comprising a valve body, a connecting shaft mounted on the valve body, a valve cover mounted on the valve body, a ball support connected to the connecting shaft, and a ball valve connected to the ball support. A first sliding groove is provided on the inner bottom wall of the valve cover, and an alloy sealing ring is slidably disposed in the first sliding groove. A second sliding groove is provided on the bottom surface of the alloy sealing ring, and a rubber sealing ring is slidably disposed in the second sliding groove. A plurality of telescopic rods for limiting the position of the alloy sealing ring are provided on the alloy sealing ring.

[0007] Furthermore, a first magnet ring is fixed to the upper surface of the alloy sealing ring, and a second magnet ring is fixed to the inner top wall of the first groove, with the first magnet ring and the second magnet ring repelling each other.

[0008] By adopting the above technical solution, when the operator needs to control the opening and closing of the valve body, the operator needs to drive the ball valve to rotate. At this time, the operator needs to connect one end of the connecting shaft to the pneumatic actuator and turn on the pneumatic actuator. This causes the connecting shaft to rotate under the action of the pneumatic actuator, thereby driving the ball valve to rotate and controlling the opening and closing of the valve body. During this process, the first and second magnetic rings repel each other, ensuring that the bottom surface of the alloy sealing ring always presses against the upper surface of the ball valve. When the ball valve rotates, the bottom surface of the alloy sealing ring cleans impurities from the ball valve surface, reducing the probability of impurities adhering to the ball valve surface, effectively improving the surface smoothness of the ball valve, and thus improving the sealing performance of the ball valve.

[0009] Furthermore, an annular groove is formed on the inner wall of the second slide groove, and an annular piece is slidably disposed in the annular groove. The inner wall of the annular piece is fixed to the rubber sealing ring.

[0010] By adopting the above technical solution, the annular piece moves up and down with the rubber sealing ring, reducing the probability of the rubber sealing ring separating from the second groove, thereby improving the stability of the device and the user experience.

[0011] Furthermore, a first magnet is fixed to the upper surface of the annular plate, and a second magnet is fixed to the inner top wall of the second groove, with the first magnet and the second magnet repelling each other.

[0012] By adopting the above technical solution, when the rubber sealing ring is not subjected to external force, the rubber sealing ring is always pressed against the upper surface of the ball valve under the action of the first magnet due to the mutual repulsion between the first magnet and the second magnet, thereby improving the sealing effect of the ball valve and reducing the probability of leakage of the dome valve.

[0013] Furthermore, the telescopic rod includes a connecting block fixed to the upper surface of the alloy sealing ring, a sliding groove is provided on the bottom surface of the connecting block, a first moving groove is provided on the inner top wall of the sliding groove, a plurality of second moving grooves are provided on the inner top wall of the first sliding groove, and the telescopic rod also includes a moving rod that is slidably disposed in the first moving groove and the second moving groove, and a threaded cap that is threadedly connected to the upper end of the moving rod.

[0014] Furthermore, a sliding block is slidably disposed within the sliding groove, and the upper surface of the sliding block is fixed to the bottom surface of the moving rod.

[0015] By adopting the above technical solution, when workers need to install the alloy sealing ring, they need to connect the sliding block and the sliding groove in advance, and fix the connecting block and the upper surface of the alloy sealing ring together, so that the upper end of the moving rod extends beyond the connecting block. Furthermore, workers need to connect the alloy sealing ring and the first sliding groove, so that the moving rod and the second moving groove can be connected. Further, workers need to connect the threaded cap and the upper end of the moving rod, so that the threaded cap limits the movement of the moving rod, thereby reducing the probability of the alloy sealing ring separating from the first sliding groove, and thus improving the stability of the alloy sealing ring.

[0016] Furthermore, the upper surface of the valve cover is provided with a plurality of receiving grooves arranged in a circumferential array. The receiving grooves correspond one-to-one with the second moving groove and the moving rod. The receiving grooves are used to receive threaded caps.

[0017] Furthermore, the thickness of the threaded cap is equal to the depth of the receiving groove.

[0018] By adopting the above technical solution, when the operator connects the threaded cap to the upper end of the moving rod, the operator only needs to turn the threaded cap to connect the threaded cap to the receiving groove, and finally make the upper surface of the threaded cap flush with the upper surface of the valve cover, thereby improving the operator's user experience.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. In this application, when the operator needs to control the opening and closing of the valve body, the operator needs to drive the ball valve to rotate. At this time, the operator needs to connect one end of the connecting shaft to the pneumatic actuator and turn on the pneumatic actuator, so that the connecting shaft can rotate under the action of the pneumatic actuator, thereby driving the ball valve to rotate, and thus controlling the opening and closing of the valve body. During this process, the first magnetic ring and the second magnetic ring repel each other, so that the bottom surface of the alloy sealing ring is always pressed against the upper surface of the ball valve. When the ball valve rotates, the bottom surface of the alloy sealing ring cleans the impurities on the surface of the ball valve, thereby reducing the probability of impurities adhering to the surface of the ball valve, effectively improving the surface smoothness of the ball valve, and thus helping to improve the sealing performance of the ball valve;

[0021] 2. In this application, when the rubber sealing ring is not subjected to external force, due to the mutual repulsion between the first magnet and the second magnet, the rubber sealing ring is always pressed against the upper surface of the ball valve under the action of the first magnet, thereby improving the sealing effect of the ball valve and reducing the probability of leakage of the dome valve.

[0022] 3. In this application, when the worker needs to install the alloy sealing ring, the worker must first connect the sliding block and the sliding groove, and fix the connecting block and the upper surface of the alloy sealing ring together, so that the upper end of the moving rod extends beyond the connecting block. Furthermore, the worker needs to connect the alloy sealing ring and the first sliding groove, so that the moving rod and the second moving groove can be connected. Furthermore, the worker needs to connect the threaded cap and the upper end of the moving rod, so that the threaded cap limits the movement of the moving rod, thereby reducing the probability of the alloy sealing ring separating from the first sliding groove, and thus improving the stability of the alloy sealing ring. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the receiving groove and its connection structure according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the annular groove and its connection structure according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the telescopic rod and its connection structure according to an embodiment of the present utility model.

[0027] In the diagram: 1. Valve body; 11. Connecting shaft; 2. Valve cover; 21. Ball support; 3. Ball valve; 31. First slide groove; 4. Alloy sealing ring; 41. Second slide groove; 5. Rubber sealing ring; 6. Telescopic rod; 61. Connecting block; 611. Sliding groove; 612. First moving groove; 613. Second moving groove; 62. Moving rod; 63. Threaded cap; 7. First magnet ring; 71. Second magnet ring; 72. Annular groove; 8. Annular plate; 81. First magnet plate; 82. Second magnet plate; 83. Sliding block; 9. Receiving groove. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1-4 As shown in the illustration, this application discloses a novel double-seal dome valve, comprising a valve body 1, a connecting shaft 11, a valve cover 2, a ball-shaped support 21, a ball valve 3, an alloy sealing ring 4, a rubber sealing ring 5, a telescopic rod 6, a first magnetic ring 7, a second magnetic ring 71, an annular plate 8, a first magnetic plate 81, a second magnetic plate 82, and a sliding block 83. Two connecting shafts 11 are symmetrically mounted on both sides of the valve body 1. The valve cover 2 is mounted on the valve body 1. Two ball-shaped supports 21 are sequentially connected to the two connecting shafts 11. The ball valve 3 is mounted on both ball-shaped supports 21 to allow the ball valve 3 to move synchronously with the connecting shafts 11. A first groove 31 is formed on the inner bottom wall of the valve cover 2. The alloy sealing ring 4 is a block structure with a circular cross-section and is slidably disposed within the first groove 31. A second groove 41 is formed on the bottom surface of the alloy sealing ring 4. The rubber sealing ring 5 is a block structure with a circular cross-section and is slidably disposed within the second groove 41.

[0030] Multiple telescopic rods 6 are sequentially arranged on the alloy sealing ring 4 to limit the movement of the alloy sealing ring 4. The telescopic rod 6 includes a connecting block 61, a moving rod 62, and a threaded cap 63. The connecting block 61 is a circular block structure and is fixed to the upper surface of the alloy sealing ring 4. A sliding groove 611 is formed on the bottom surface of the connecting block 61, a first moving groove 612 is formed on the inner top wall of the sliding groove 611, and multiple second moving grooves 613 are formed on the inner top wall of the first sliding groove 611. The moving rod 62 is a circular rod structure and is slidably disposed in the first moving groove 612 and the second moving grooves 613. The threaded cap 63 is threadedly connected to the upper end of the moving rod 62. The sliding block 83 is a circular plate structure and is slidably disposed in the sliding groove 611. The upper surface of the sliding block 83 is fixed to the bottom surface of the moving rod 62.

[0031] When the worker needs to install the alloy sealing ring 4, the worker must first connect the sliding block 83 to the sliding groove 611 and fix the connecting block 61 to the upper surface of the alloy sealing ring 4, so that the upper end of the moving rod 62 extends beyond the connecting block 61. Further, the worker needs to connect the alloy sealing ring 4 to the first sliding groove 31, so that the moving rod 62 connects to the second moving groove 613. Further still, the worker needs to connect the threaded cap 63 to the upper end of the moving rod 62, so that the threaded cap 63 limits the movement of the moving rod 62, thereby reducing the probability of the alloy sealing ring 4 separating from the first sliding groove 31, and thus improving the stability of the alloy sealing ring 4.

[0032] The first magnet ring 7 is a block structure with a circular cross-section, and is fixed to the upper surface of the alloy sealing ring 4. The second magnet ring 71 is a block structure with a circular cross-section, and is fixed to the inner top wall of the first sliding groove 31, and the first magnet ring 7 and the second magnet ring 71 repel each other.

[0033] When the operator needs to control the opening and closing of valve body 1, the operator needs to drive ball valve 3 to rotate. At this time, the operator needs to connect one end of connecting shaft 11 to the pneumatic actuator and turn on the pneumatic actuator. This will cause connecting shaft 11 to rotate under the action of the pneumatic actuator, thereby driving ball valve 3 to rotate and controlling the opening and closing of valve body 1. During this process, the first magnetic ring 7 and the second magnetic ring 71 repel each other, ensuring that the bottom surface of the alloy sealing ring 4 always presses against the upper surface of ball valve 3. When ball valve 3 rotates, the bottom surface of the alloy sealing ring 4 cleans impurities from the surface of ball valve 3, reducing the probability of impurities adhering to the surface of ball valve 3, effectively improving the surface smoothness of ball valve 3, and thus improving the sealing performance of ball valve 3.

[0034] The inner wall of the second sliding groove 41 is provided with an annular groove 72. The annular piece 8 is a sheet structure with a circular cross-section. The annular piece 8 is slidably disposed in the annular groove 72, and the inner wall of the annular piece 8 is fixed to the rubber sealing ring 5.

[0035] The annular plate 8 moves up and down with the rubber sealing ring 5, reducing the probability of the rubber sealing ring 5 separating from the second sliding groove 41, thereby improving the stability of the device and the user experience.

[0036] The first magnet piece 81 is a sheet-like structure with a circular cross-section, and is fixed to the upper surface of the annular piece 8. The second magnet piece 82 is a sheet-like structure with a circular cross-section, and is fixed to the inner top wall of the second groove 41, with the first magnet piece 81 and the second magnet piece 82 repelling each other.

[0037] When the rubber sealing ring 5 is not subjected to external force, due to the mutual repulsion between the first magnet 81 and the second magnet 82, the rubber sealing ring 5 is always pressed against the upper surface of the ball valve 3 under the action of the first magnet 81, thereby improving the sealing effect of the ball valve 3 and reducing the probability of leakage of the dome valve.

[0038] The upper surface of the valve cover 2 has multiple receiving grooves 9 arranged in a circumferential array. The receiving grooves 9 correspond one-to-one with the second moving groove 613 and the moving rod 62, and are used to receive the threaded cap 63. The thickness of the threaded cap 63 is equal to the depth of the receiving groove 9.

[0039] When the operator connects the threaded cap 63 to the upper end of the moving rod 62, the operator only needs to turn the threaded cap 63 to connect the threaded cap 63 to the receiving groove 9, and finally make the upper surface of the threaded cap 63 flush with the upper surface of the valve cover 2, thereby improving the operator's user experience.

[0040] The operating principle of this novel double-seal dome valve in this embodiment is as follows: When the operator needs to control the opening and closing of the valve body 1, the operator needs to drive the ball valve 3 to rotate. At this time, the operator needs to connect one end of the connecting shaft 11 to the pneumatic actuator and turn on the pneumatic actuator, so that the connecting shaft 11 rotates under the action of the pneumatic actuator, thereby driving the ball valve 3 to rotate, and thus controlling the opening and closing of the valve body 1. During this process, the first magnetic ring 7 and the second magnetic ring 71 repel each other, so that the bottom surface of the alloy sealing ring 4 always presses against the upper surface of the ball valve 3. When the ball valve 3 rotates, the bottom surface of the alloy sealing ring 4 cleans the impurities on the surface of the ball valve 3, thereby reducing the probability of impurities adhering to the surface of the ball valve 3, effectively improving the surface smoothness of the ball valve 3, and thus helping to improve the sealing performance of the ball valve 3.

[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A novel double-seal dome valve, comprising a valve body (1), a connecting shaft (11) mounted on the valve body (1), a valve cover (2) mounted on the valve body (1), a ball support (21) interconnected with the connecting shaft (11), and a ball valve (3) interconnected with the ball support (21), characterized in that: The valve cover (2) has a first sliding groove (31) on its inner bottom wall. An alloy sealing ring (4) is slidably disposed in the first sliding groove (31). A second sliding groove (41) is provided on the bottom surface of the alloy sealing ring (4). A rubber sealing ring (5) is slidably disposed in the second sliding groove (41). The alloy sealing ring (4) is provided with a plurality of telescopic rods (6) for limiting the alloy sealing ring (4).

2. The novel double-seal dome valve according to claim 1, characterized in that: The upper surface of the alloy sealing ring (4) is fixed with a first magnet ring (7), and the inner top wall of the first groove (31) is fixed with a second magnet ring (71). The first magnet ring (7) and the second magnet ring (71) repel each other.

3. A novel double-seal dome valve according to claim 2, characterized in that: An annular groove (72) is provided on the inner wall of the second groove (41), and an annular piece (8) is slidably arranged in the annular groove (72). The inner wall of the annular piece (8) is fixed to the rubber sealing ring (5).

4. A novel double-seal dome valve according to claim 3, characterized in that: The upper surface of the annular plate (8) is fixed with a first magnet plate (81), and the inner top wall of the second groove (41) is fixed with a second magnet plate (82). The first magnet plate (81) and the second magnet plate (82) repel each other.

5. A novel double-seal dome valve according to claim 4, characterized in that: The telescopic rod (6) includes a connecting block (61) fixed on the upper surface of the alloy sealing ring (4). The bottom surface of the connecting block (61) is provided with a sliding groove (611). The inner top wall of the sliding groove (611) is provided with a first moving groove (612). The inner top wall of the first sliding groove (31) is provided with a plurality of second moving grooves (613). The telescopic rod (6) also includes a moving rod (62) that is slidably disposed in the first moving groove (612) and the second moving grooves (613) and a threaded cap (63) that is threadedly connected to the upper end of the moving rod (62).

6. A novel double-seal dome valve according to claim 5, characterized in that: A sliding block (83) is slidably disposed in the sliding groove (611), and the upper surface of the sliding block (83) is fixed to the bottom surface of the moving rod (62).

7. A novel double-seal dome valve according to claim 6, characterized in that: The upper surface of the valve cover (2) is provided with a plurality of receiving grooves (9) arranged in a circumferential array. The receiving grooves (9) correspond one-to-one with the second moving groove (613) and the moving rod (62). The receiving grooves (9) are used to receive the threaded cap (63).

8. A novel double-seal dome valve according to claim 7, characterized in that: The thickness of the threaded cap (63) is equal to the depth of the receiving groove (9).

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