A hydraulic cylinder support structure for GIL high-drop shaft installation

Abstract

This application belongs to the technical field of support structures, and in particular relates to a hydraulic cylinder support structure for GIL high-drop shaft installation, including a GIL shaft pipe gallery assembly, a hydraulic jack, and a GIL horizontal bellows. The top and bottom of the GIL shaft pipe gallery assembly are respectively fixedly installed with an upper top and a lower top. The top surface of the lower top is fixedly installed with a hydraulic cylinder support frame for supporting the hydraulic jack, and a pressure relief bearing seat is provided on the hydraulic cylinder support frame. In the present invention, after the hydraulic jack completes the jacking work, if the GIL shaft pipe gallery assembly or the GIL horizontal bellows is subjected to a lateral force, the pressure relief bearing seat will radially offset within the radial rail, causing the sealing piston to move within the correction cavity, and then changing the rigid connection of the pressure relief bearing seat installed on the hydraulic jack to a flexible connection. On the one hand, it protects the hydraulic jack and avoids offset load of the hydraulic jack. On the other hand, it enables the GIL horizontal bellows to relieve the external force received, with high safety.

Description

Technical Field

[0001] The present invention relates to a support structure, and particularly to a hydraulic cylinder support structure for installation of a GIL high-drop shaft. Background Art

[0002] In large hydropower stations, rigid gas-insulated transmission line equipment (abbreviated as GIL) is usually used as the incoming and outgoing line equipment from the underground powerhouse to the power station outgoing yard. Due to terrain conditions, the GIL equipment layout channels in large hydropower station construction all adopt the form of high-drop shafts. For example, in the shaft GIL projects such as the already completed Xiluodu Hydropower Station and the under-construction Wudongde Hydropower Station, the drop height of a single shaft tunnel is 200 meters to 300 meters. The length of a single GIL standard section in the shaft tunnel is 11.5 meters, and the standard sections are connected in series by means of flange connection and screw fastening. After the overall series connection of the shaft sections is completed, it is fixed by top suspension or bottom support.

[0003] The prior art is to also use a support of a fixed support type at the bottom of the shaft section, and the GIL shaft section equipment is fixed in the shaft section pipe gallery through the fixed supports at the top and bottom, and a buffer assembly is arranged between the two fixed supports at the top and bottom of the shaft to absorb the installation errors of the GI equipment, etc. The inventor found the following defects in the prior art: When using a bellows in the shaft section equipment to absorb the installation error caused by product processing error, it is difficult to operate when adjusting the bellows. In the shaft section, the layout direction of the equipment is vertical. When adjusting the bellows, it is necessary to overcome the gravity load of the equipment itself, and the operation space is small in the narrow shaft pipe gallery, which is not conducive to the adjustment operation of the bellows; during the working process of the hydraulic cylinder, it is easy to generate load, resulting in poor stability and safety of the overall equipment. Summary of the Invention

[0004] The main purpose of the present disclosure is to provide a hydraulic cylinder support structure for installation of a GIL high-drop shaft, so as to effectively solve the problems raised by the inventor in the above background art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A hydraulic cylinder support structure for installation of a GIL high-drop shaft, comprising a GIL shaft pipe gallery assembly, a hydraulic jack, and a GIL horizontal bellows. The top and bottom of the GIL shaft pipe gallery assembly are respectively fixedly installed with an upper top and a lower top. A hydraulic cylinder support frame for supporting the hydraulic jack is fixedly installed on the top surface of the lower top. A pressure relief bearing seat is arranged on the hydraulic cylinder support frame (3). The hydraulic jack is fixedly installed on the top of the pressure relief bearing seat. A protection assembly for fixing the GIL horizontal bellows is arranged at the piston end of the hydraulic jack, and the protection assembly is matched with the upper top.

[0007] Preferably, a radial moving track is provided at the top of the hydraulic cylinder support frame, the pressure relief bearing seat is slidably installed in the radial moving track, a correction cavity is provided on the side wall of the radial moving track, a sealing piston is slidably installed in the correction cavity, the sealing piston is fixedly connected to the side surface of the pressure relief bearing seat, and the length of the sealing piston is smaller than the length of the correction cavity.

[0008] Preferably, an oil chamber is formed between the side of the sealing piston away from the pressure relief bearing seat and the inner wall of the correction cavity. An oil pressure pipe is connected in the oil chamber, and the other end of the oil pressure pipe extends outside the hydraulic cylinder support frame and is connected to an external oil pressure device.

[0009] Preferably, the protection assembly includes a fixed carrier, a horizontal section support and a balance key. The fixed carrier is fixedly connected to the output piston end of the hydraulic jack. The horizontal section support is arranged on the fixed carrier. The balance key is fixed to the top of the horizontal section support. The GIL horizontal corrugated pipe penetrates through the horizontal section support, and the balance key is movably installed on the upper end top.

[0010] Preferably, a follow-up port is provided on the bottom surface of the upper end top. The top end portion of the balance key extends into the follow-up port. A clamping chamber is provided on the side wall of the follow-up port. An inclined surface clamp is slidably installed in the clamping chamber. A disc spring is fixedly connected to the bottom of the clamping chamber, and the other end of the disc spring is fixedly connected to the inclined surface clamp. The end of the inclined surface clamp away from the disc spring abuts against the side surface of the balance key.

[0011] Preferably, protective rubber pads are fixed on the inner wall of the horizontal section support and are distributed in an annular array. Compressive springs are embedded in the protective rubber pads, and one end of each compressive spring is fixed to the inner wall of the horizontal section support.

[0012] Preferably, each hydraulic jack is connected with an oil return pipeline, and a control valve is installed on each oil return pipeline.

[0013] Preferably, the connecting line between the radial moving track and the follow-up port is a vertical line.

[0014] In view of this, compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1). In the present application, after installing each hydraulic cylinder support frame (3) and hydraulic jack, and erecting and supporting the GIL horizontal corrugated pipe with the horizontal section support, then the horizontal section support is lifted by the hydraulic jack and the fixed carrier until the protection assembly cooperates with the upper end top 11. When maintenance or overhaul is required, only the lifting operation of each hydraulic jack and the GIL horizontal corrugated pipe needs to be performed separately.

[0016] (2) In this application, after the hydraulic jack completes the jacking work, if the GIL shaft pipe gallery assembly or the GIL horizontal bellows is subjected to a lateral force, the pressure relief bearing seat will undergo a radial offset within the radial moving track, causing the sealing piston to move within the correction cavity. Subsequently, the pressure relief bearing seat installed on the hydraulic jack changes from a rigid connection to a flexible connection. On the one hand, it protects the hydraulic jack and prevents the hydraulic jack from experiencing an offset load. On the other hand, it enables the GIL horizontal bellows to relieve the external force it receives, ensuring high safety.

[0017] (3) In this application, when the GIL horizontal bellows or the hydraulic jack fluctuates radially, since the balance key is connected to the horizontal section support, the balance key will move horizontally within the follow-up port synchronously. Also, the inclined plane clamp abuts against the balance key. Under the elastic effect of the disc spring, the movement of the balance key is alleviated, preventing the situation where the upper end of the hydraulic jack moves while the lower end does not move, effectively protecting the overall equipment. Additionally, the cooperation of the disc spring and the inclined plane clamp also ensures the stability of the directional movement of the balance key, preventing the horizontal section support from detaching (tipping over) from the fixed carrier as the pressure relief bearing seat moves significantly, improving the reliability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The following shows the schematic structural diagram of the hydraulic cylinder support structure for GIL high-drop shaft installation provided by the present invention;

[0019] Figure 2 The following shows Figure 1 a sectional view;

[0020] Figure 3 The following shows Figure 2 a partial structural schematic diagram of a location in

[0021] Figure 4 The following shows Figure 2 another partial structural schematic diagram of a location in

[0022] Figure 5 The following shows a sectional view of the horizontal section support;

[0023] Figure 6 The following shows a three-dimensional view of the fixed carrier.

[0024] ICON:

[0025] 1 - GIL shaft pipe gallery assembly; 11 - upper end top; 12 - lower end top;

[0026] 2 - hydraulic jack; 21 - fixed carrier; 22 - oil return pipeline;

[0027] 3 - hydraulic cylinder support frame; 31 - radial moving track; 32 - correction cavity; 33 - sealing piston; 34 - oil pressure pipe;

[0028] 4 - GIL horizontal bellows;

[0029] 5 - Pressure relief bearing seat;

[0030] 6 - Horizontal section brace; 61 - Protective rubber pad; 62 - Compressive spring;

[0031] 7 - Balance key; 71 - Follow - up orifice; 72 - Clamping bin; 73 - Disc spring; 74 - Inclined plane clamp. Specific implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Please refer to Figures 1-6 , the present invention provides the following embodiments:

[0034] Embodiment 1

[0035] A hydraulic cylinder support structure for GIL high - drop shaft installation, including a GIL shaft pipe gallery assembly 1, a hydraulic jack 2, and a GIL horizontal bellows 4. The top and bottom of the GIL shaft pipe gallery assembly 1 are respectively fixedly installed with an upper top 11 and a lower top 12. The top surface of the lower top 12 is fixedly installed with a hydraulic cylinder support frame 3 for supporting the hydraulic jack 2. A pressure relief bearing seat 5 is provided on the hydraulic cylinder support frame 3. The hydraulic jack 2 is fixedly installed on the top of the pressure relief bearing seat 5. A protective component for fixing the GIL horizontal bellows 4 is provided at the piston end of the hydraulic jack 2, and the protective component cooperates with the upper top 11.

[0036] Specifically, a radial moving track 31 is opened at the top of the hydraulic cylinder support frame 3. The pressure relief bearing seat 5 is slidably installed in the radial moving track 31. A correction cavity 32 is opened on the side wall of the radial moving track 31. A sealing piston 33 is slidably installed in the correction cavity 32. The sealing piston 33 is fixedly connected to the side surface of the pressure relief bearing seat 5. The length of the sealing piston 33 is smaller than the length of the correction cavity 32.

[0037] Specifically, an oil chamber is formed between the side of the sealing piston 33 away from the pressure relief bearing seat 5 and the inner wall of the correction cavity 32. An oil pressure pipe 34 is connected in the oil chamber. The other end of the oil pressure pipe 34 extends outside the hydraulic cylinder support frame 3 and is connected to an external oil pressure device. When the hydraulic jack 2 moves, connect the oil pressure pipe 34 to the external oil pressure device and turn on the oil pressure device to make the oil enter the correction cavity 32 to squeeze the pressure relief bearing seat and drive it to slide centrically to correct the hydraulic jack 2.

[0038] Specifically, each hydraulic jack 2 is connected to an oil return pipeline 22, and a control valve is installed on each oil return pipeline 22.

[0039] Specifically, the connecting line between the radial moving track 31 and the follower port 71 is a vertical line.

[0040] The specific implementation of this embodiment is as follows: Install each hydraulic cylinder support frame 3 and hydraulic jack 2, and use the horizontal section support 6 to support the GIL horizontal bellows 4. Then, use the hydraulic jack 2 and the fixed carrier 21 to lift the horizontal section support 6 until the protection component cooperates with the upper end cap 11. When maintenance or repair is required, only the lifting operation of each hydraulic jack 2 and the GIL horizontal bellows 4 needs to be carried out separately;

[0041] After the hydraulic jack 2 completes the lifting work, if the GIL shaft pipe gallery assembly 1 or the GIL horizontal bellows 4 is subjected to a lateral force, the pressure relief seat 5 will radially shift within the radial moving track 31, causing the sealing piston 33 to move within the correction cavity 32. Subsequently, the pressure relief seat 5 installed on the hydraulic jack 2 changes from a rigid connection to a flexible connection. On the one hand, it protects the hydraulic jack 2 and prevents the hydraulic jack 2 from experiencing offset loads. On the other hand, it enables the GIL horizontal bellows 4 to relieve the external force received and improves safety.

[0042] Embodiment Two

[0043] The difference from Embodiment One is that it further includes the following content:

[0044] The protection component includes a fixed carrier 21, a horizontal section support 6, and a balance key 7. The fixed carrier 21 is fixedly connected to the output piston end of the hydraulic jack 2. The horizontal section support 6 is placed on the fixed carrier 21. The balance key 7 is fixed to the top of the horizontal section support 6. The GIL horizontal bellows 4 passes through the horizontal section support 6, and the balance key 7 is movably installed on the upper end cap 11.

[0045] Specifically, a follower port 71 is opened on the bottom surface of the upper end cap 11. The top end of the balance key 7 extends into the follower port 71. A clamping chamber 72 is opened on the side wall of the follower port 71. An inclined surface clamp 74 is slidably installed in the clamping chamber 72. A disc spring 73 is fixedly connected to the bottom of the clamping chamber 72, and the other end of the disc spring 73 is fixedly connected to the inclined surface clamp 74. The end of the inclined surface clamp 74 away from the disc spring 73 abuts against the side surface of the balance key 7.

[0046] Specifically, a protective rubber pad 61 is fixed to the inner wall of the horizontal section support 6 and is arranged in an annular array. A compression spring 62 is embedded in the protective rubber pad 61, and one end of the compression spring 62 is fixed to the inner wall of the horizontal section support 6. The outer side of the protective rubber pad 61 is pressed against the outer wall of the GIL horizontal bellows 4, and the GIL horizontal bellows 4 is protected by the property of thermal expansion and contraction to prevent rupture.

[0047] In this embodiment, when the GIL horizontal corrugated pipe 4 or the hydraulic jack 2 fluctuates radially, since the balance key 7 is connected to the horizontal section support 6, the balance key 7 will synchronously move horizontally within the follower port 71. Also, the inclined surface clamp 74 abuts against the balance key 7. Under the elastic force effect of the disc spring 73, the movement of the balance key 7 is alleviated, avoiding the situation where the upper end of the hydraulic jack 2 moves while the lower end does not move, effectively protecting the overall equipment. In addition, the cooperation between the disc spring 73 and the inclined surface clamp 74 also ensures the stability of the directional movement of the balance key 7, preventing the horizontal section support 6 from detaching (tipping over) from the fixed carrier 21 as the pressure relief seat 5 moves significantly, improving the reliability of the support.

[0048] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate on all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A hydraulic cylinder support structure for GIL high-drop shaft installation, comprising a GIL shaft pipe gallery assembly (1), a hydraulic jack (2), and a GIL horizontal bellows (4), characterized in that: At the top and bottom of the GIL shaft pipe gallery assembly (1), an upper top (11) and a lower top (12) are fixedly installed respectively. On the top surface of the lower top (12), a hydraulic cylinder support frame (3) for supporting the hydraulic jack (2) is fixedly installed. A pressure relief bearing seat (5) is provided on the hydraulic cylinder support frame (3). The hydraulic jack (2) is fixedly installed on the top of the pressure relief bearing seat (5). A protective component for fixing the GIL horizontal bellows (4) is provided at the piston end of the hydraulic jack (2), and the protective component cooperates with the upper top (11). A radial moving track (31) is formed at the top of the hydraulic cylinder support frame (3). The pressure relief bearing seat (5) is slidably installed in the radial moving track (31). A correction cavity (32) is formed in the side wall of the radial moving track (31). A sealing piston (33) is slidably installed in the correction cavity (32). The sealing piston (33) is fixedly connected to the side surface of the pressure relief bearing seat (5). The length of the sealing piston (33) is smaller than the length of the correction cavity (32). An oil chamber is formed between the side of the sealing piston (33) away from the pressure relief bearing seat (5) and the inner wall of the correction cavity (32). An oil pressure pipe (34) is connected in the oil chamber. The other end of the oil pressure pipe (34) extends outside the hydraulic cylinder support frame (3) and is connected to an external oil pressure device.

2. The hydraulic cylinder support structure for GIL high-drop shaft installation according to claim 1, characterized in that: The protective component includes a fixed carrier (21), a horizontal section support (6) and a balance key (7). The fixed carrier (21) is fixedly connected to the output piston end of the hydraulic jack (2). The horizontal section support (6) is placed on the fixed carrier (21). The balance key (7) is fixed on the top of the horizontal section support (6). The GIL horizontal bellows (4) penetrates through the horizontal section support (6). The balance key (7) is movably installed on the upper top (11).

3. The hydraulic cylinder support structure for GIL high-drop shaft installation according to claim 2, wherein: A follow-up port (71) is formed on the bottom surface of the upper top (11). The top end part of the balance key (7) extends into the follow-up port (71). A clamping chamber (72) is formed in the side wall of the follow-up port (71). An inclined surface clamp (74) is slidably installed in the clamping chamber (72). A disc spring (73) is fixedly connected to the bottom of the clamping chamber (72), and the other end of the disc spring (73) is fixedly connected to the inclined surface clamp (74). The end of the inclined surface clamp (74) away from the disc spring (73) abuts against the side surface of the balance key (7).

4. A hydraulic cylinder support structure for GIL high-drop shaft installation according to claim 3, characterized in that: Protective rubber pads (61) distributed in an annular array are fixed on the inner wall of the horizontal section support (6). A compression spring (62) is embedded in the protective rubber pad (61), and one end of the compression spring (62) is fixed to the inner wall of the horizontal section support (6).

5. A hydraulic cylinder support structure for GIL high-drop shaft installation according to claim 1, characterized in that: Each hydraulic jack (2) is connected with an oil return pipeline (22), and a control valve is installed on each oil return pipeline (22).

6. A hydraulic cylinder support structure for GIL high-drop shaft installation according to claim 1, characterized in that: The connection line between the radial moving track (31) and the follow-up port (71) is a vertical line.

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