Hydropower station water delivery pipeline corrugated pipe compensator

Abstract

The utility model discloses a water and power station water delivery pipeline bellows compensator relates to water delivery pipeline bellows compensator technical field, including the bellows body, the bellows body is made of stainless steel material, the bellows body side symmetry fixed with fixed ring, the fixed ring side is provided with water delivery pipeline body, adjusting mechanism is used for adjusting screw thread interface position to adapt to the flange of different size and carry out the connection fixed, adjusting mechanism and fixed ring are connected with each other. The water and power station water delivery pipeline bellows compensator, through increase auxiliary control mechanism, realized the compensation rigidity with the automatic regulation of fluid impact force size, thereby make the compensator can be in low flow rate with weak rigidity effective absorption vibration, and with high rigidity state effective inhibition violent impact and water hammer effect, greatly reduced the risk of pipeline, valve or connecting component damage due to pressure fluctuation, guarantees the continuous stable operation of power generation system.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe compensators for water transmission pipelines, specifically a corrugated pipe compensator for a hydropower station's water transmission pipeline. Background Technology

[0002] As a key component in the pressure steel pipe system of a hydropower station, the corrugated pipe compensator is mainly responsible for compensating for the displacement of the pipeline caused by temperature changes, internal pressure and foundation settlement, and absorbing fluid pressure pulsation and vibration, especially mitigating the destructive impact of water hammer effect. It is crucial to ensure the safe and stable operation of the entire water conveyance and power generation system. However, traditional corrugated compensators used in hydropower stations have significant limitations: 1. The existing bellows compensator typically has a fixed compensation stiffness (i.e., the ability to resist deformation). This design presents an inherent contradiction under the complex operating conditions of hydropower stations: when a lower stiffness is used to effectively absorb the minor vibrations during low-load operation of the unit, it becomes too "soft" under conditions of high flow or extreme impacts such as water hammer, failing to provide sufficient support and potentially leading to excessive deformation or even damage; conversely, when a high stiffness is used to withstand water hammer impacts, it is difficult to effectively filter out minor vibrations during daily operation, affecting system stability and potentially transferring excessive stress to the fixed supports, leading to support damage. 2. The dimensions of the connecting flanges of the pressure steel pipes in hydropower stations may vary depending on the design, supplier, or renovation history. The connection interface of traditional compensators is fixed, which has poor adaptability, causing inconvenience to on-site installation and even requiring customized production, increasing costs and construction time. Summary of the Invention

[0003] The purpose of this invention is to provide a corrugated pipe compensator for water transmission pipelines in hydropower stations to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a corrugated pipe compensator for a hydropower station water transmission pipeline, comprising a corrugated pipe body, the corrugated pipe body being made of stainless steel, and fixing rings being symmetrically fixed on the left and right sides of the corrugated pipe body, with the water transmission pipeline body being disposed on the side of the fixing rings. An adjustment mechanism is used to adjust the position of the threaded interface to accommodate flanges of different sizes for connection and fixation. The adjustment mechanism is connected to the fixing ring. The auxiliary control mechanism automatically adjusts the stiffness of the bellows body based on the impact of the fluid on the bellows body, thereby automatically adapting to changes in the impact force of the fluid. The auxiliary control mechanism is located on the outside of the bellows body, and several auxiliary control mechanisms are set at equal angles about the center of the bellows body. A sealing mechanism is installed on the auxiliary control mechanism to achieve the sealing function of the hydraulic oil.

[0005] Preferably, a sealing ring is nested on the side of the fixed ring facing the water pipe body, and several square grooves are opened at equal angles on the fixed ring. Guide grooves are provided on the side of the square grooves. At the same time, several ear plates are fixed at equal angles on the outside of the fixed ring. The ear plates are connected to the auxiliary control mechanism. Through the function of the sealing ring, a basic guarantee can be provided for the connection and sealing of subsequent devices.

[0006] Preferably, the adjustment mechanism includes a threaded seat disposed in a square groove, and the threaded seat and the square groove are distributed in a one-to-one correspondence. A slider is also fixed on the threaded seat, and the slider is nested in a guide groove and can slide. Through the sliding action between the slider and the guide groove, the position of the threaded seat can be adjusted to adapt to pipes of different sizes for connection and installation, thereby improving the adaptability of the device.

[0007] Preferably, a convex shaft is fixed on the side of the threaded seat near the bellows body, and the convex shaft is slidably connected to the arc-shaped groove. The arc-shaped groove is opened at an equal angle on the adjusting ring, and the inner diameter of the adjusting ring is larger than the outer diameter of the bellows body. A convex ring is also fixed on the adjusting ring, and the convex ring slides within the groove on the fixed ring. By rotating the adjusting ring, the arc-shaped groove can be rotated. Combined with the sliding action between the arc-shaped groove and the convex shaft, a basic force can be provided for adjusting the position of the threaded seat. Furthermore, the sliding limiting action between the convex ring and the groove on the fixed ring can ensure the stability of the rotation of the adjusting ring.

[0008] Preferably, a connecting flange is fixed to the side of the water supply pipe body near the fixing ring, and the connecting flange contacts the sealing ring to achieve a sealing effect. The connecting flange is locked by fastening bolts and threaded seats. At the same time, the fastening bolts and threaded seats are distributed in a one-to-one correspondence. Through the connection and locking effect between the fastening bolts and threaded seats, the connection and fixation between the water supply pipe body and the corrugated pipe body can be realized. Combined with the sealing effect between the connecting flange and the sealing ring, the sealing performance of the device connection can be effectively guaranteed, and liquid leakage can be avoided.

[0009] Preferably, the auxiliary control mechanism includes a sealing cylinder with one end fixed to the left ear plate, and a bracket fixed to the other end of the sealing cylinder. A piston rod is slidably connected to the bracket, and the piston rod and the sealing cylinder are slidably connected. The sealing cylinder is filled with hydraulic oil. The stability of the piston rod movement can be ensured by the sliding guiding effect between the piston rod, the sealing cylinder, and the bracket.

[0010] Preferably, a limiting plate is fixed on the piston rod, and the limiting plate contacts the bracket to achieve a positioning function, and the limiting plate contacts the sealing cylinder to achieve a positioning function. When the piston rod moves, the limiting plate can be moved synchronously. Through the contact positioning function between the limiting plate and the bracket or the sealing cylinder, the movement distance of the piston rod can be limited, thereby achieving the protection function of the bellows body, avoiding damage caused by excessive stretching or compression of the bellows body, and effectively ensuring the service life of the bellows body.

[0011] Preferably, a piston head is also fixed on the piston rod, and the piston head is slidably connected inside the sealing cylinder. Several circular holes are equally spaced on the piston head, and a variable-diameter shaft is installed inside each of these holes. The variable-diameter shafts are distributed in a one-to-one correspondence with the circular holes, and the variable-diameter shafts are fixed inside the sealing cylinder. The diameter of the variable-diameter shaft at its center is smaller than the diameters at its two sides, and the maximum diameter of the variable-diameter shaft is smaller than the diameter of the circular holes. Moving the piston rod can move the piston head, and the movement of the piston head within the hydraulic oil inside the sealing cylinder provides a buffering effect, thus preventing damage to the bellows body. Furthermore, the interaction between the circular holes and variable-diameter shafts of different diameters allows for adjustment of the area through which the hydraulic oil flows, providing a fundamental guarantee for adjusting the stiffness of the bellows body and effectively preventing damage to the bellows body.

[0012] Preferably, the sealing mechanism includes an oil inlet fixed on the sealing cylinder, and the oil inlet cooperates with the sealing plug to achieve a seal. The sealing plug is fixed on the movable plate, and the movable plate and the guide rod are slidably connected. The guide rod is symmetrically distributed about the center line of the movable plate and is fixed inside the sealing cylinder. Through the above structure, the oil inlet can be sealed to prevent hydraulic oil from overflowing from the sealing cylinder. When the sealing plug and the movable plate move, the sliding guidance between the movable plate and the guide rod can ensure the stability of the movement of the sealing plug and the movable plate.

[0013] Preferably, one end of the guide rod is fixed to the spring, and the other end of the spring is fixed inside the sealing cylinder. The spring and the guide rod are distributed in a one-to-one correspondence. Through the elastic action of the spring, a basic force can be provided for the automatic reset of the sealing plug and the movable plate, thereby ensuring the normal use of the device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The corrugated pipe compensator for the water transmission pipeline of this hydropower station, by adding an auxiliary control mechanism, achieves automatic adjustment of the compensation stiffness according to the magnitude of the fluid impact force. When the fluid impact causes the corrugated pipe to deform, it drives the piston rod and piston head to move inside the sealed cylinder. Through the circular hole opened on the piston head, it cooperates with the variable diameter shaft fixed inside the cylinder to form a variable hydraulic damper structure. When the flow rate is small and the impact force is weak, the piston head is located in the thinner section of the variable diameter shaft. The channel area of ​​the hydraulic oil flowing through the circular hole is large, the damping is small, and the compensator exhibits low stiffness, sensitively absorbing micro-vibrations. As the flow rate and impact force increase, the piston head moves to the thicker section of the variable diameter shaft. The flow channel area is gradually reduced, the damping increases significantly, and the stiffness of the compensator automatically increases. Thus, it can effectively suppress severe impacts and water hammer effects with high stiffness, greatly reducing the risk of damage to pipelines, valves, or connecting parts caused by pressure fluctuations, and ensuring the continuous and stable operation of the power generation system. 2. The corrugated pipe compensator for the water transmission pipeline of this hydropower station, through the setting of an adjustment mechanism, only requires rotating the adjustment ring to drive all the circumferentially distributed threaded seats to move radially through the cooperation of the convex shaft and the arc groove, thereby adjusting the position of the threaded holes on them so that they can be aligned with the bolt holes on the connecting flanges of different diameter specifications. This automatically adapts to the connection of flanges of different sizes, reduces the trouble caused by the mismatch of flange standards during installation, and effectively speeds up the on-site installation progress. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 2 This is a frontal three-dimensional structural diagram of the fixed ring and the water pipeline body of the present invention in a disassembled state; Figure 3 This is a side-view exploded three-dimensional structural diagram of the fixed ring and the adjusting mechanism of the present invention; Figure 4 This is a side cross-sectional three-dimensional structural diagram of the fixing ring and adjusting mechanism of the present invention; Figure 5 This is a frontal cross-sectional three-dimensional structural diagram of the auxiliary control mechanism of the present invention; Figure 6 For the present invention Figure 5 Enlarged 3D structural diagram at point A.

[0016] In the diagram: 1. Bellows body; 2. Fixing ring; 201. Sealing ring; 202. Square groove; 203. Guide groove; 204. Ear plate; 3. Adjusting mechanism; 301. Threaded seat; 302. Slider; 303. Convex shaft; 304. Arc groove; 305. Adjusting ring; 306. Convex ring; 4. Water supply pipe body; 401. Connecting flange; 402. Fastening bolt; 5. Auxiliary control mechanism; 501. Sealing cylinder; 502. Bracket; 503. Piston rod; 504. Limiting plate; 505. Piston head; 506. Round hole; 507. Variable diameter shaft; 6. Sealing mechanism; 601. Oil inlet; 602. Sealing plug; 603. Movable plate; 604. Guide rod; 605. Spring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-6 The present invention provides a technical solution: a corrugated pipe compensator for a hydropower station water transmission pipeline, including a corrugated pipe body 1, the corrugated pipe body 1 being made of stainless steel, a fixing ring 2 being symmetrically fixed on the left and right sides of the corrugated pipe body 1, and a water transmission pipeline body 4 being provided on the side of the fixing ring 2. Adjustment mechanism 3 is used to adjust the position of the threaded interface to accommodate flanges of different sizes for connection and fixation. Adjustment mechanism 3 is connected to fixing ring 2. The auxiliary control mechanism 5 automatically adjusts the stiffness of the bellows body 1 based on the impact of the fluid on the bellows body 1, thereby automatically adapting to the changes in the impact force of the fluid. The auxiliary control mechanism 5 is located on the outside of the bellows body 1, and several auxiliary control mechanisms 5 are set at equal angles with respect to the center of the bellows body 1. A sealing mechanism 6 is installed on the auxiliary control mechanism 5 to achieve the sealing function of the hydraulic oil.

[0019] The sealing mechanism 6 includes an oil inlet 601 fixed on the sealing cylinder 501, and the oil inlet 601 cooperates with the sealing plug 602 to achieve sealing. The sealing plug 602 is fixed on the movable plate 603. The movable plate 603 is slidably connected to the guide rod 604. The guide rod 604 is symmetrically distributed about the center line of the movable plate 603 and is fixed inside the sealing cylinder 501. The guide rod 604 is fixed to one end of the spring 605 and the other end of the spring 605 is fixed inside the sealing cylinder 501. The spring 605 and the guide rod 604 are distributed in a one-to-one correspondence. When using the corrugated pipe compensator for the water transmission pipeline of this hydropower station, such as Figures 1-6 As shown, hydraulic oil is first injected into the sealing cylinder 501 through the oil inlet 601. During the injection of hydraulic oil, the pressure generated by the hydraulic oil entering the oil inlet 601 causes the sealing plug 602 to move relative to the oil inlet 601. With the sliding guidance between the movable plate 603 and the guide rod 604, the stability of the movement of the sealing plug 602 can be ensured. At this time, the spring 605 is compressed, thereby separating the sealing plug 602 from the oil inlet 601 and releasing the sealing effect on the oil inlet 601, facilitating the injection of hydraulic oil. After the hydraulic oil is injected, the elasticity of the spring 605 causes the movable plate 603 and the sealing plug 602 to automatically reset, so that the sealing plug 602 seals the oil inlet 601, thereby preventing hydraulic oil from overflowing. To further ensure the sealing effect, a sealing end cap can be connected to the outside of the oil inlet 601 to further ensure the sealing effect. A sealing ring 201 is nested on the side of the fixed ring 2 facing the water pipe body 4. Several square grooves 202 are equally spaced on the fixed ring 2, and guide grooves 203 are provided on the sides of the square grooves 202. Several ear plates 204 are fixed at equal angles on the outer side of the fixed ring 2, and the ear plates 204 are connected to the auxiliary control mechanism 5. The adjustment mechanism 3 includes a threaded seat 301 disposed within the square grooves 202, with the threaded seats 301 corresponding to the square grooves 202. A slider 302 is fixed on the threaded seat 301, and the slider 302 is nested within the guide groove 203 and can slide. The threaded seat 301 is located near the corrugated pipe body. A convex shaft 303 is fixed on one side of the bellows body 1, and the convex shaft 303 and the arc groove 304 are slidably connected. The arc groove 304 is opened at equal angles on the adjusting ring 305. At the same time, the inner diameter of the adjusting ring 305 is larger than the outer diameter of the bellows body 1. A convex ring 306 is also fixed on the adjusting ring 305, and the convex ring 306 is nested in the groove on the fixing ring 2 for sliding. A connecting flange 401 is fixed on the side of the water supply pipe body 4 near the fixing ring 2. The connecting flange 401 contacts the sealing ring 201 to achieve a sealing effect. The connecting flange 401 is locked to the threaded seat 301 by fastening bolts 402. At the same time, the fastening bolts 402 and the threaded seat 301 are distributed in a one-to-one correspondence. During the installation and use of the device, such as Figures 1-6As shown, firstly, the position of the threaded seat 301 is adjusted according to the position of the bolt holes on the connecting flange 401. At this time, simply push the adjusting ring 305. With the sliding action between the convex ring 306 and the groove on the fixed ring 2, the adjusting ring 305 can be rotated under force. Through the rotation of the adjusting ring 305, the arc-shaped groove 304 is simultaneously rotated. With the sliding action between the arc-shaped groove 304 and the convex shaft 303, the threaded seat 301 can be moved under force. Combined with the sliding guidance action between the slider 302 and the guide groove 203, the position of the threaded seat 301 is adjusted, ensuring that the threaded holes on the threaded seat 301 correspond to the bolt holes on the connecting flange 401. Based on the above... In principle, by adjusting the position of the threaded seat 301, it can accommodate the installation of connecting flanges 401 of different sizes, effectively improving the adaptability of the device. When the threaded hole on the threaded seat 301 corresponds to the bolt hole on the connecting flange 401, the fastening bolt 402 passes through the bolt hole on the connecting flange 401 and the threaded hole on the threaded seat 301 to connect, thereby locking the connecting flange 401 and the fixing ring 2, thus realizing the installation and fixation of the water pipeline body 4 and the bellows body 1. After the fixation is completed, the sealing ring 201 can ensure the sealing between the connecting flange 401 and the fixing ring 2, thereby effectively preventing liquid leakage during the later use of the device. The auxiliary control mechanism 5 includes a sealing cylinder 501 with one end fixed to the left ear plate 204, and a bracket 502 fixed to the other end of the sealing cylinder 501. A piston rod 503 is slidably connected to the bracket 502, and the piston rod 503 is slidably connected to the sealing cylinder 501. The sealing cylinder 501 is filled with hydraulic oil. A limit plate 504 is fixed to the piston rod 503, and the limit plate 504 contacts the bracket 502 to achieve a positioning function, and the limit plate 504 contacts the sealing cylinder 501 to achieve a positioning function. A piston head 505 is also fixed on the piston rod 503, and the piston head 505 is slidably connected inside the sealing cylinder 501. Several circular holes 506 are opened at equal angles on the piston head 505. A variable diameter shaft 507 is provided in the circular holes 506. The variable diameter shaft 507 and the circular holes 506 are distributed in a one-to-one correspondence. The variable diameter shaft 507 is fixed inside the sealing cylinder 501. The diameter of the middle position of the variable diameter shaft 507 is smaller than the diameter of the two sides. At the same time, the maximum diameter of the variable diameter shaft 507 is smaller than the diameter of the circular holes 506. After the device is installed, in actual use, such as Figures 1-6 As shown, at this time, the fluid flows inside the water pipe body 4 and the corrugated pipe body 1. Through the elastic expansion and contraction deformation of the corrugated pipe body 1, the thermal displacement, mechanical deformation and vibration absorption of the pipe body 4 can be compensated, thereby ensuring the normal operation of fluid transportation. During the operation of the device, when the fluid flow rate of the pipe body 4 is small (fluid velocity < 2m / s), the impact of the fluid on the bellows body 1 is small, that is, the deformation of the bellows body 1 is small. When the bellows body 1 deforms, the piston rod 503 slides relative to the sealing cylinder 501 under force. The piston rod 503 drives the piston head 505 to move in the hydraulic oil in the sealing cylinder 501. At this time, since the circular hole 506 on the piston head 505 and the minimum diameter shaft on the variable diameter shaft 507 are matched, the area of ​​hydraulic oil flowing through the circular hole 506 on both sides of the piston head 505 is the largest. This makes the resistance of the piston head 505 moving in the hydraulic oil the smallest. At this time, the rigid surface of the entire bellows body 1 is in a relatively soft state, which can sensitively absorb small vibrations and ensure the normal operation of the device. During the operation of the device, when the fluid flow rate of the pipe body 4 is moderate (2m / s≤fluid velocity<4m / s), the impact of the fluid on the bellows body 1 is moderate, that is, the deformation of the bellows body 1 increases. When the bellows body 1 deforms, the piston rod 503 slides relative to the sealing cylinder 501 under force. The piston rod 503 synchronously drives the piston head 505 to move in the hydraulic oil in the sealing cylinder 501. At this time, since the moving distance of the piston head 505 exceeds the length of the smallest diameter shaft on the variable diameter shaft 507, the circular hole 506 on the piston head 505 will continue to move and cooperate with the second smallest diameter shaft on the variable diameter shaft 507. That is, at this time, the area of ​​hydraulic oil flowing through the circular hole 506 on both sides of the piston head 505 is reduced, which increases the resistance encountered by the piston head 505 in the hydraulic oil. At this time, the stiffness of the entire bellows body 1 increases, which can effectively suppress and absorb this larger impact energy, prevent it from being transmitted to other parts of the pipeline, and ensure the safety of the device. During the operation of the device, when the fluid flow rate of the pipe body 4 is large (4 m / s ≤ fluid velocity), the impact of the fluid on the bellows body 1 is large, that is, the deformation of the bellows body 1 increases. When the bellows body 1 deforms, the piston rod 503 is subjected to force and slides relative to the sealing cylinder 501. The piston rod 503 synchronously drives the piston head 505 to move in the hydraulic oil inside the sealing cylinder 501. At this time, because the moving distance of the piston head 505 exceeds the minimum diameter shaft and the second smallest diameter shaft on the variable diameter shaft 507, The combined length of the piston head 505 causes the circular hole 506 on the piston head 505 to continue to move and cooperate with the largest diameter shaft on the variable diameter shaft 507. At this time, the area through which the hydraulic oil flows on both sides of the piston head 505 through the circular hole 506 is reduced, which increases the resistance encountered by the piston head 505 in the hydraulic oil. At this time, the stiffness of the entire bellows body 1 is further increased. The resistance encountered by the piston head 505 in the hydraulic oil resists the impact force of the fluid, thereby effectively absorbing the impact force of the fluid and effectively ensuring the safety of the entire pipeline system. When the fluid flow rate is large, the increased movement distance of the piston rod 503 and piston head 505 causes greater deformation of the bellows body 1. To prevent damage to the bellows body 1 due to excessive deformation, the limiting plate 504 moves synchronously during the movement of the piston rod 503. When the limiting plate 504 contacts the bracket 502 or the sealing cylinder 501, it can achieve a limiting effect, thereby protecting the bellows body 1, preventing damage to the bellows body 1 due to excessive deformation, and ensuring the service life of the bellows body 1.

[0020] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A corrugated pipe compensator for a hydropower station water transmission pipeline, comprising a corrugated pipe body (1), wherein the corrugated pipe body (1) is made of stainless steel, characterized in that: The corrugated pipe body (1) is symmetrically fixed with fixing rings (2) on the left and right sides, and the water conveying pipe body (4) is provided on the side of the fixing rings (2). The adjusting mechanism (3) is used to adjust the position of the threaded interface to adapt to flanges of different sizes for connection and fixation. The adjusting mechanism (3) is connected to the fixing ring (2). The auxiliary control mechanism (5) automatically adjusts the stiffness of the bellows body (1) according to the impact of the fluid on the bellows body (1), thereby automatically adapting to the change of the impact force of the fluid. The auxiliary control mechanism (5) is set on the outside of the bellows body (1), and there are several auxiliary control mechanisms (5) set at the same angle about the center of the bellows body (1). A sealing mechanism (6) is installed on the auxiliary control mechanism (5) to realize the sealing function of the hydraulic oil. The auxiliary control mechanism (5) includes a sealing cylinder (501) with one end fixed on the left ear plate (204), and a bracket (502) fixed on the other end of the sealing cylinder (501). A piston rod (503) is slidably connected to the bracket (502), and the piston rod (503) and the sealing cylinder (501) are slidably connected. The sealing cylinder (501) is filled with hydraulic oil. A limiting plate (504) is fixed on the piston rod (503), and the limiting plate (504) contacts the bracket (502) to achieve positioning, and the limiting plate (504) contacts the sealing cylinder (501) to achieve positioning. A piston head (505) is also fixed on the piston rod (503), and the piston head (505) is slidably connected inside the sealing cylinder (501). Several circular holes (506) are opened at equal angles on the piston head (505), and a variable diameter shaft (507) is provided inside the circular hole (506). The variable diameter shaft (507) and the circular hole (506) are distributed in a one-to-one correspondence. The variable diameter shaft (507) is fixed inside the sealing cylinder (501), and the diameter of the middle position of the variable diameter shaft (507) is smaller than the diameter of the two sides. At the same time, the maximum diameter of the variable diameter shaft (507) is smaller than the diameter of the circular hole (506).

2. The corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 1, characterized in that: A sealing ring (201) is nested on the side of the fixed ring (2) facing the water pipe body (4), and a number of square grooves (202) are opened at equal angles on the fixed ring (2), and a guide groove (203) is provided on the side of the square groove (202) on the fixed ring (2). At the same time, a number of ear plates (204) are fixed at equal angles on the outside of the fixed ring (2), and the ear plates (204) are connected to the auxiliary control mechanism (5).

3. The corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 2, characterized in that: The adjustment mechanism (3) includes a threaded seat (301) disposed in a square groove (202), and the threaded seat (301) and the square groove (202) are distributed in a one-to-one correspondence. A slider (302) is also fixed on the threaded seat (301), and the slider (302) is nested in the guide groove (203) and can slide.

4. A corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 3, characterized in that: A convex shaft (303) is fixed on the side of the threaded seat (301) near the bellows body (1), and the convex shaft (303) and the arc groove (304) are slidably connected. The arc groove (304) is opened at the same angle on the adjusting ring (305). At the same time, the inner diameter of the adjusting ring (305) is larger than the outer diameter of the bellows body (1). A convex ring (306) is also fixed on the adjusting ring (305), and the convex ring (306) is nested in the groove on the fixed ring (2) for sliding.

5. A corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 4, characterized in that: The water pipeline body (4) is fixed with a connecting flange (401) on the side near the fixing ring (2), and the connecting flange (401) contacts the sealing ring (201) to achieve a sealing effect. The connecting flange (401) is locked to the threaded seat (301) by fastening bolts (402), and the fastening bolts (402) and the threaded seat (301) are distributed in a one-to-one correspondence.

6. A corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 1, characterized in that: The sealing mechanism (6) includes an oil inlet (601) fixed on the sealing cylinder (501), and the oil inlet (601) cooperates with the sealing plug (602) to achieve sealing. The sealing plug (602) is fixed on the movable plate (603), and the movable plate (603) and the guide rod (604) are slidably connected. The guide rod (604) is symmetrically distributed about the center line of the movable plate (603), and the guide rod (604) is fixed inside the sealing cylinder (501).

7. A corrugated pipe compensator for a hydropower station water transmission pipeline according to claim 6, characterized in that: The guide rod (604) is fixed to one end of the spring (605), and the other end of the spring (605) is fixed inside the sealing cylinder (501). The spring (605) and the guide rod (604) are distributed in a one-to-one correspondence.

Images