Positive pressure type breathing air valve for hydroelectric power station

Abstract

The positive pressure type breathing air valve for the hydroelectric power plant comprises a valve body pipeline and has the advantages that a threaded rod can be driven to rotate through a rotating rod, a second gear and a first gear, and then a supporting block slides up and down along the inner wall of a sleeve block; the position of the valve body pipeline in the vertical direction can be adjusted by rotating the valve body pipeline, the angle of the valve body pipeline can be adjusted by being matched with the supporting rod, the transmission block and the limiting plate, the valve body pipeline can be fixed by being matched with the limiting bolt and the limiting hole, and the valve body pipeline and other pipelines can be installed together through the installation disc. When the pressure in the pipeline is too large, the pressure can enter the pressure relief pipe through the air inlet, and the pressure relief opening can be opened and closed through the pressure relief assembly inner sealing plate, the telescopic rod and the spring, so that the pressure in the pipeline can be discharged out, the pressure in the pipeline can be maintained within a normal range, and normal operation of the hydroelectric power plant is guaranteed.

Description

Technical Field

[0001] The utility model relates to a positive pressure breathing air valve used in a hydroelectric power station, belonging to the field of hydroelectric power stations. Background Art

[0002] During the operation of a hydropower station, when a turbine generator set suddenly sheds load or shuts down due to an accident, the turbine guide vanes must be quickly closed to prevent the speed of the unit from rising too high. This will cause the pressure in the pipeline to rise and even exceed the allowable value. Air valves and other equipment are usually used to resolve the contradiction between the pressure and speed increase, thereby ensuring the safe operation of the hydropower station.

[0003] In the prior art, a commonly used air valve is used to connect a valve body pipe fixedly connected to the air valve with an external pipe. After water flows into the valve body pipe, the pressure inside the pipe can be discharged through the air valve at the top of the valve body pipe so that the pressure in the pipe can be maintained within a normal range. However, when the ground on which the valve body pipe is installed is not flat or is tilted, the valve body pipe is prone to misalignment when docking with other pipes, thereby affecting the sealing of the connection between the valve body pipe and other pipes. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a positive pressure breathing air valve for a hydroelectric power station, so as to solve the problem in the above-mentioned background technology that when the ground on which the valve body pipeline is installed is not flat or is tilted, the valve body pipeline is prone to misalignment when docking with other pipelines, thereby affecting the sealing of the connection between the valve body pipeline and other pipelines.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a positive pressure breathing air valve for a hydroelectric power station, comprising a valve body pipe, two mounting plates are fixedly connected to the surface of the valve body pipe, a plurality of first mounting holes are opened on the surface of the mounting plate, an air inlet is fixedly connected to the top end of the valve body pipe, a pressure relief assembly is movably connected to the top end of the valve body pipe, an adjustment assembly is fixedly connected to the bottom end of the valve body pipe, a mounting plate is fixedly connected to the bottom end of the adjustment assembly, and a plurality of second mounting holes are opened at the four corners of the top end of the mounting plate.

[0006] Furthermore, the pressure relief assembly includes a pressure relief pipe threadedly connected to the surface of the air inlet, a plurality of telescopic rods are fixedly connected to the inner wall at the top end of the pressure relief pipe, a sealing plate is fixedly connected to the telescopic end of the telescopic rod, an outer side of the sealing plate and the inner wall of the pressure relief pipe are slidingly connected, a plurality of springs are fixedly connected to the top end of the sealing plate, the springs and the pressure relief are fixedly connected, and two pressure relief ports are opened on the surface of the pressure relief pipe.

[0007] Furthermore, the adjusting component includes a transmission block fixedly connected to the bottom end of the valve body pipeline, a support rod rotatably connected in the transmission block, limit plates fixedly connected at both ends of the support rod, a plurality of limit holes are opened on the surface of the limit plate, and limit bolts are threadedly connected in the limit holes, a sleeve block is fixedly connected to the bottom end of the limit plate, a support block is slidably connected to the inner wall of the sleeve block, a threaded rod is threadedly connected in the support block, a first gear is fixedly connected to the top end of the threaded rod, a rotating rod is rotatably connected to the inner wall of the sleeve block, a second gear is fixedly connected to the surface of the rotating rod, and the second gear is meshed with the first gear.

[0008] Furthermore, a dustproof net is fixedly connected to the inner wall of the pressure relief port, and the size of the dustproof net is consistent with the size of the pressure relief port.

[0009] Furthermore, a plurality of support frames are fixedly connected to one side of the limit plate away from the transmission block, and arc-shaped grooves are provided in the support frames.

[0010] Furthermore, a thread is arranged on the outside of the air inlet, an internal thread is arranged on the bottom of the inner wall of the pressure relief pipe, and a sealing ring is fixedly connected to the outside of the sealing plate.

[0011] The beneficial effects of the utility model are as follows: the valve body pipeline can be installed to the specified position through the mounting plate, the threaded rod can be driven to rotate through the rotating rod, the second gear and the first gear, so that the support block can slide up and down along the inner wall of the sleeve block, and the position of the valve body pipeline in the up and down directions can be adjusted. The angle of the valve body pipeline can be adjusted by rotating the valve body pipeline in cooperation with the support rod, the transmission block and the limit plate, the valve body pipeline can be fixed by using the limit bolts and the limit holes, and the valve body pipeline can be installed together with other pipelines through the mounting plate.

[0012] When the pressure in the pipeline is too high, the pressure will enter the pressure relief pipe through the air inlet. The pressure relief port can be opened and closed through the sealing plate, telescopic rod and spring in the pressure relief assembly, so that the pressure inside the pipeline can be discharged so that the pressure in the pipeline can be maintained within a normal range, ensuring the normal operation of the hydroelectric power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of a positive pressure breathing air valve used in a hydroelectric power station according to the utility model;

[0015] Figure 2 It is a schematic diagram of a side sectional structure of a positive pressure breathing air valve used in a hydroelectric power station according to the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of a pressure relief assembly of a positive pressure breathing air valve used in a hydroelectric power station according to the utility model;

[0017] In the figure: 1. valve body pipeline; 2. mounting plate; 3. air inlet; 4. pressure relief assembly; 41. pressure relief pipe; 42. telescopic rod; 43. sealing plate; 44. spring; 45. pressure relief port; 5. adjustment assembly; 51. transmission block; 52. support rod; 53. limit plate; 54. sleeve block; 55. support block; 56. threaded rod; 57. first gear; 58. rotating rod; 59. second gear; 6. mounting plate; 7. dust net; 8. support frame. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a technical solution: a positive pressure breathing air valve for a hydroelectric power station, comprising a valve body pipeline 1, two mounting plates 2 are fixedly connected to the surface of the valve body pipeline 1, a plurality of first mounting holes are opened on the surface of the mounting plate 2, an air inlet 3 is fixedly connected to the top of the valve body pipeline 1, a pressure relief component 4 is movably connected to the top of the valve body pipeline 1, an adjusting component 5 is fixedly connected to the bottom of the valve body pipeline 1, a mounting plate 6 is fixedly connected to the bottom of the adjusting component 5, and a plurality of second mounting holes are opened at the four corners of the top of the mounting plate 6.

[0020] The valve body pipeline 1 can be installed to the specified position through the mounting plate 6. The rotating rod 58, the second gear 59 and the first gear 57 in the adjusting component 5 can drive the threaded rod 56 to rotate, so that the support block 55 can slide up and down along the inner wall of the sleeve block 54, and the position of the valve body pipeline 1 in the up and down direction can be adjusted. The angle of the valve body pipeline 1 can be adjusted by rotating the valve body pipeline 1, cooperating with the support rod 52, the transmission block 51 and the limit plate 53. The valve body pipeline 1 can be fixed by matching the limit bolts and the limit holes. The valve body pipeline 1 can be installed together with other pipelines through the mounting plate 2. When the pressure in the pipeline is too large, the pressure will enter the pressure relief pipe 41 through the air inlet 3. The pressure relief port 45 can be opened and closed through the sealing plate 43, the telescopic rod 42 and the spring 44 in the pressure relief component 4, so that the pressure inside the pipeline can be discharged so that the pressure in the pipeline can be maintained within a normal range, thereby ensuring the normal operation of the hydropower station.

[0021] See also Figure 1 , Figure 2 and Figure 3The utility model provides a technical solution: the pressure relief component 4 includes a pressure relief pipe 41 threadedly connected to the surface of the air inlet 3, a plurality of telescopic rods 42 are fixedly connected to the inner wall of the top end of the pressure relief pipe 41, a sealing plate 43 is fixedly connected to the telescopic end of the telescopic rod 42, the outer side of the sealing plate 43 and the inner wall of the pressure relief pipe 41 are slidably connected, a plurality of springs 44 are fixedly connected to the top end of the sealing plate 43, the springs 44 and the pressure relief pipe 41 are fixedly connected, and two pressure relief ports 45 are provided on the surface of the pressure relief pipe 41. When the pressure in the pipeline is too high, the pressure will enter the pressure relief pipe 41 through the air inlet 3. When the pressure in the pressure relief pipe 41 accumulates to a threshold value, the sealing plate 43 will slide upward along the inner wall of the pressure relief pipe 41 until the pressure relief port 45 is exposed, and the pressure inside the pipeline can be discharged. At this time, the telescopic rod 42 will contract and drive the spring 44 to contract. When the pressure in the pipeline drops to a certain level, the spring 44 will reset and drive the telescopic rod 42 to extend, thereby pushing the sealing plate 43 to slide downward along the inner wall of the pressure relief pipe 41, thereby blocking the pressure relief port 45. Through the above steps, the pressure in the pipeline can be maintained within a normal range, ensuring the normal operation of the hydroelectric power station.

[0022] The adjusting assembly 5 includes a transmission block 51 fixedly connected to the bottom end of the valve body pipeline 1, a support rod 52 is rotatably connected inside the transmission block 51, and limit plates 53 are fixedly connected at both ends of the support rod 52. A plurality of limit holes are provided on the surface of the limit plate 53, and limit bolts are threadedly connected in the limit holes. A sleeve block 54 is fixedly connected to the bottom end of the limit plate 53, and a support block 55 is slidably connected to the inner wall of the sleeve block 54. A threaded rod 56 is threadedly connected to the inner wall of the support block 55, and a first gear 57 is fixedly connected to the top of the threaded rod 56. A rotating rod 58 is rotatably connected to the inner wall of the sleeve block 54, and a second gear 59 is fixedly connected to the surface of the rotating rod 58, and the second gear 59 is meshed with the first gear 57. First, place the mounting plate 6 to the specified position and fix the valve body pipeline 1 by screwing the bolt into the second mounting hole, then rotate the rotating rod 58, and the rotation of the rotating rod 58 will drive the second gear 59 on its surface to rotate, thereby driving the threaded rod 56 connected to the bottom end of the first gear 57 meshing with the second gear 59 to rotate at the same time, and the rotation of the threaded rod 56 makes the support block 55 slide up and down along the inner wall of the sleeve block 54, so that the position of the valve body pipeline 1 in the up and down direction can be adjusted, and then the valve body pipeline 1 is rotated so that the transmission block 51 sleeved on the surface of the support rod 52 rotates around the limit plate 53, and when the mounting plates 2 on both sides of the valve body pipeline 1 are just docked with the mounting plates 2 on the side of the other pipeline, the limit bolts are screwed into the limit holes to adjust the angle of the valve body pipeline 1, and finally the bolts are screwed into the two docking mounting plates 2 to complete the installation of the valve body pipeline 1.

[0023] The inner wall of the pressure relief port 45 is fixedly connected with a dustproof net 7, and the size of the dustproof net 7 is consistent with the size of the pressure relief port 45. By providing the dustproof net 7, it is possible to prevent external dust from entering the pressure relief pipe 41 from the pressure relief port 45 when the pressure is released.

[0024] A plurality of support frames 8 are fixedly connected to one side of the limit plate 53 away from the transmission block 51, and arc grooves are provided in the support frames 8. The support frames 8 can provide additional support for the limit bolts, thereby improving the firmness of the connection between the transmission block 51 and the limit plate 53.

[0025] The air inlet 3 is provided with threads on the outside, the pressure relief pipe 41 is provided with internal threads on the bottom of the inner wall, and a sealing ring is fixedly connected to the outside of the sealing plate 43. The sealing ring is provided to improve the sealing performance between the sealing plate 43 and the pressure relief pipe 41.

[0026] Specific implementation method: first, place the mounting plate 6 to the specified position and fix the valve body pipeline 1 by screwing the bolt into the second mounting hole, then rotate the rotating rod 58, and the rotation of the rotating rod 58 will drive the second gear 59 on its surface to rotate, thereby driving the threaded rod 56 connected to the bottom end of the first gear 57 meshing with the second gear 59 to rotate at the same time, and the rotation of the threaded rod 56 makes the support block 55 slide up and down along the inner wall of the sleeve block 54, so that the position of the valve body pipeline 1 in the up and down direction can be adjusted, and then the valve body pipeline 1 is rotated to make the transmission block 51 sleeved on the surface of the support rod 52 rotate around the limit plate 53, and when the mounting plates 2 on both sides of the valve body pipeline 1 are just docked with the mounting plates 2 on the sides of other pipelines, the limit bolts are screwed into the limit holes to adjust the angle of the valve body pipeline 1. degree, and finally, screw the bolts into the two docking mounting plates 2 to complete the installation of the valve body pipeline 1. When the pressure in the pipeline is too high, the pressure will enter the pressure relief pipe 41 through the air inlet 3. When the pressure in the pressure relief pipe 41 accumulates to a threshold value, the sealing plate 43 will slide upward along the inner wall of the pressure relief pipe 41 until the pressure relief port 45 is exposed, and the pressure inside the pipeline can be discharged. At this time, the telescopic rod 42 will contract and drive the spring 44 to contract. When the pressure in the pipeline drops to a certain level, the spring 44 will reset and drive the telescopic rod 42 to extend, thereby pushing the sealing plate 43 to slide downward along the inner wall of the pressure relief pipe 41, thereby blocking the pressure relief port 45. Through the above steps, the pressure in the pipeline can be maintained within a normal range, thereby ensuring the normal operation of the hydroelectric power station.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positive pressure breathing air valve for a hydroelectric power station, comprising a valve body pipe (1), two mounting plates (2) being fixedly connected to the surface of the valve body pipe (1), a plurality of first mounting holes being provided on the surface of the mounting plate (2), characterized in that: The top end of the valve body pipeline (1) is fixedly connected to an air inlet (3), the top end of the valve body pipeline (1) is movably connected to a pressure relief assembly (4), the bottom end of the valve body pipeline (1) is fixedly connected to an adjustment assembly (5), the bottom end of the adjustment assembly (5) is fixedly connected to a mounting plate (6), and a plurality of second mounting holes are provided at the four corners of the top end of the mounting plate (6).

2. A positive pressure breathing air valve for a hydroelectric power station according to claim 1, characterized in that: The pressure relief assembly (4) comprises a pressure relief pipe (41) threadedly connected to the surface of the air inlet (3); a plurality of telescopic rods (42) are fixedly connected to the inner wall of the top end of the pressure relief pipe (41); the telescopic ends of the telescopic rods (42) are fixedly connected to a sealing plate (43); the outer side of the sealing plate (43) and the inner wall of the pressure relief pipe (41) are slidably connected; a plurality of springs (44) are fixedly connected to the top end of the sealing plate (43); the springs (44) and the pressure relief pipe (41) are fixedly connected; and two pressure relief ports (45) are provided on the surface of the pressure relief pipe (41).

3. A positive pressure breathing air valve for a hydroelectric power station according to claim 1, characterized in that: The regulating assembly (5) comprises a transmission block (51) fixedly connected to the bottom end of the valve body pipeline (1), a support rod (52) being rotatably connected inside the transmission block (51), a limit plate (53) being fixedly connected at both ends of the support rod (52), a plurality of limit holes being provided on the surface of the limit plate (53), limit bolts being threadedly connected in the limit holes, a sleeve block (54) being fixedly connected at the bottom end of the limit plate (53), a support block (55) being slidably connected to the inner wall of the sleeve block (54), a threaded rod (56) being threadedly connected to the inner wall of the support block (55), a first gear (57) being fixedly connected to the top end of the threaded rod (56), a rotating rod (58) being rotatably connected to the inner wall of the sleeve block (54), a second gear (59) being fixedly connected to the surface of the rotating rod (58), and the second gear (59) being meshed with the first gear (57).

4. A positive pressure breathing air valve for a hydroelectric power station according to claim 2, characterized in that: A dustproof net (7) is fixedly connected to the inner wall of the pressure relief port (45), and the size of the dustproof net (7) is consistent with the size of the pressure relief port (45).

5. A positive pressure breathing air valve for a hydroelectric power station according to claim 3, characterized in that: A plurality of support frames (8) are fixedly connected to one side of the limit plate (53) away from the transmission block (51), and an arc-shaped groove is provided in the support frame (8).

6. A positive pressure breathing air valve for a hydroelectric power station according to claim 2, characterized in that: The air inlet (3) is provided with a thread on the outside, the inner wall bottom of the pressure relief pipe (41) is provided with an internal thread, and the sealing ring is fixedly connected to the outside of the sealing plate (43).

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