Ultra-large-diameter negative-pressure-resistant rectangular compensator for condenser and pressure resistance method

Abstract

The invention relates to the technical field of pipeline compensators, in particular to an ultra-large-diameter negative-pressure-resistant rectangular compensator for a condenser and a compression resistance method.The ultra-large-diameter negative-pressure-resistant rectangular compensator for the condenser comprises a middle connecting pipe assembly, end pipe assemblies connected to the two ends of the middle connecting pipe assembly and corrugated pipes connected between the middle connecting pipe assembly and the end pipe assemblies in a compensation mode and further comprises a fixing frame, the middle connecting pipe assembly is surrounded at intervals; the guide supporting base is arranged on the inner side of the fixing frame, a sliding way is formed in the guide supporting base along the track parallel to the diagonal line of the middle connecting pipe assembly, and a first sliding rod is arranged in the sliding way in a sliding mode; the end face linkage assembly is arranged between the fixing frame and the middle connecting pipe assembly and comprises a right-angle plate and a panel. Through the end face linkage assembly composed of the right-angle plate and the panel, synchronous deformation of the four end faces of the middle connecting pipe assembly is achieved, the problem that a single end face excessively protrudes or sinks inwards is solved by utilizing active deformation of the non-deformation end face to bear negative pressure acting force, and irreversible distortion of the cross section of a pipeline is prevented.

Description

Technical Field

[0001] This invention relates to the field of pipeline compensator technology, specifically to an ultra-large diameter negative pressure resistant rectangular compensator for condensers, and a pressure-resistant method for the ultra-large diameter negative pressure resistant rectangular compensator for condensers. Background Technology

[0002] In industrial sectors such as thermal power generation, the connection between the steam turbine and the condenser requires a pipe compensator to allow for media flow and absorb axial and radial displacements caused by temperature changes during equipment operation. These compensators operate under full vacuum conditions for extended periods, with continuous negative pressure acting on the pipe wall, especially for pipes with a cross-sectional area of ​​40m². 2 Due to material and process limitations, the overall strength of the four end faces of the compensator pipe in the circumferential direction of the above-mentioned ultra-large diameter rectangular pipes will inevitably differ. Therefore, under the action of internal negative pressure, a certain end face will often become a "stress weak point" due to slight differences in wall thickness, residual welding stress, or weak local support. The negative pressure will preferentially cause the end face to bulge or concave inward, resulting in the continuous concentration of negative pressure energy on the weak end face, causing excessive deformation of the end face, thereby triggering the internal collapse of the entire compensator pipe. Summary of the Invention

[0003] This invention addresses the problems in the prior art by providing an ultra-large diameter rectangular compensator for condensers to resist negative pressure and a pressure-resistant method. The specific technical solution is as follows: On one hand, this application provides an ultra-large diameter anti-negative pressure rectangular compensator for condensers, including an intermediate pipe assembly, end pipe assemblies connected to both ends of the intermediate pipe assembly, and a bellows connecting the intermediate pipe assembly and the end pipe assemblies for compensation, and further including: The mounting bracket is spaced around the outside of the central connecting pipe assembly; A guide support is provided inside the fixed frame. A slide rail is provided on the guide support along the trajectory parallel to the diagonal line of the intermediate pipe assembly. A slide rod is slidably provided in the slide rail. The end face linkage component is disposed between the fixed frame and the intermediate pipe assembly, including a right angle plate and a panel. The number and position of the right angle plate correspond to the corners of the intermediate pipe assembly, and the number and position of the panel correspond to the end face of the intermediate pipe assembly. The panel is slidably inserted into the right angle plate, and the right angle plate is fixedly connected to the slide rod. When one end face of the intermediate pipe assembly is deformed inward due to negative pressure, the other three end faces of the intermediate pipe assembly deform synchronously through the end face linkage component.

[0004] As a further technical solution of the present invention, an energy-absorbing component is also included, the energy-absorbing component comprising: Connecting block one is connected to the guide support seat; Connecting block two is connected to the corner of the intermediate pipe assembly; And a spring, connected between connecting block one and connecting block two; When the intermediate connecting pipe assembly deforms due to internal negative pressure, the connecting block one and connecting block two move away from each other and pull the spring to deform in order to absorb the negative pressure.

[0005] As a further technical solution of the present invention, a force transmission component is also included, the force transmission component comprising: The rotating rod is rotatably mounted on the guide support seat; One end of the pull rope is wound clockwise around the rotating rod, and the other end is connected to the right-angle plate; The second pull rope is wound counterclockwise around the rotating rod, and the other end is connected to the first connecting block. The first connecting block is slidably mounted on the guide support seat through the sliding rod and the slide rail. When the slide rod slides under negative pressure interference, the connecting block moves in the opposite direction to the right-angle plate to further deform the spring.

[0006] As a further technical solution of the present invention, a damping component is also included, the damping component comprising: A damping cavity is formed inside the guide support and coaxially disposed outside the rotating rod, and the damping cavity is filled with a damping medium; A baffle is fixedly installed inside the damping cavity to prevent the flow of the medium. A paddle is movably disposed within the damping cavity. The paddle is fixedly connected to the rotating rod and has a damping hole for the medium to pass through. When the lever rotates, the paddle squeezes the medium and forces it to flow through the damping orifice to absorb energy.

[0007] As a further technical solution of the present invention, it also includes a support cage, which includes multiple support rods evenly surrounding the compensator body.

[0008] As a further technical solution of the present invention, both of the end pipe assemblies have radially extending flanges, the support cage is mounted between the two flanges, and the fixing frame is connected in series on the support cage.

[0009] As a further technical solution of the present invention, a rhombus-shaped bracket and a cross bracket are sequentially arranged inside the intermediate pipe assembly. The apex of the rhombus-shaped bracket is supported in the middle of the intermediate pipe assembly, and the end of the cross bracket is supported inside the apex of the rhombus-shaped bracket.

[0010] On the other hand, this application also provides a method for resisting pressure of an ultra-large diameter negative pressure rectangular compensator for condensers, including the following steps: The first step is to use the end face linkage component to drive the four end faces of the intermediate pipe assembly to deform synchronously when the compensator is in full vacuum condition and the intermediate pipe assembly is deformed by the internal negative pressure. The active deformation of the non-deformed end face is used to share the negative pressure force and avoid excessive bulging of a single end face. The second step is that when the intermediate pipe assembly deforms, it pulls the spring of the energy-absorbing assembly. The elastic deformation of the spring converts the deformation kinetic energy generated by the negative pressure into elastic potential energy, thus consuming part of the negative pressure energy. The third step is that when the middle part of the intermediate connecting pipe assembly deforms inward, it drives the slide rod one to slide along the slide and pulls the pull rope one, driving the rotating rod to rotate. The rotating rod pulls the connecting block one to slide outward through the pull rope two, and then pulls the corner of the intermediate connecting pipe assembly through the spring, transferring the concentrated negative pressure stress in the middle to the corner. The fourth step is that when the rotating rod rotates, it drives the damping component's paddle to rotate in the damping cavity, squeezing the damping medium and forcing it to flow through the damping hole. The viscous damping force of the medium consumes the rotating rod's rotational kinetic energy and controls the deformation speed of the intermediate connecting pipe assembly. Fifth, when the intermediate pipe assembly deforms inward, the internal rhomboid support is compressed and tends to shrink. The cross support applies a reverse support force to the apex of the rhomboid support, forming a double protection with the external components to resist the deformation of the intermediate pipe assembly.

[0011] The beneficial effects of this invention are as follows: (1) By using the end face linkage assembly composed of right angle plate and panel, the synchronous deformation of the four end faces of the intermediate pipe assembly is realized. The active deformation of the non-deformable end face is used to share the negative pressure force, and the problem of excessive protrusion or concavity of a single end face is completely solved, preventing irreversible distortion of the pipe cross-section.

[0012] (2) The energy-absorbing component converts the kinetic energy of negative pressure deformation into elastic potential energy through spring deformation, and the damping component consumes the rotational kinetic energy of the rotating rod by using the viscous damping force of the medium. The dual energy-absorbing mechanism greatly reduces the impact of negative pressure. At the same time, through the linkage design of the rotating rod and the pull rope, the concentrated negative pressure stress in the middle is transferred to the corner with higher structural strength, optimizing the force distribution and reducing the risk of damage in the middle.

[0013] (3) The damping component forcibly controls the deformation speed of the intermediate pipe assembly to avoid instantaneous irreversible deformation when the negative pressure fluctuates greatly, thus ensuring the stability and reliability of the compensator operation under full vacuum conditions.

[0014] (4) The external support cage will evenly distribute the force to the flange and the equipment shell to avoid local overload; the internal "cross-diameter" double support structure strengthens the rigidity of the middle part and forms a synergistic protection with the external anti-deformation components, effectively solving the industry pain point of easy deformation in the middle of ultra-large diameter pipelines. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of an ultra-large diameter anti-negative pressure rectangular compensator for condensers is shown. Figure 2 A schematic diagram of the compensator body is shown; Figure 3 A schematic diagram of the supporting cage structure is shown; Figure 4 A schematic diagram of the anti-deformation component is shown; Figure 5 A schematic diagram of the end face linkage assembly is shown. Figure 6 A schematic diagram of the inner side of the guide support is shown; Figure 7 A schematic diagram of the outer side of the guide support is shown; Figure 8 A schematic diagram of the damping component is shown; Figure 9 A schematic diagram of the internal structure of the intermediate pipe assembly is shown.

[0016] Figure Descriptions: 100, Compensator Body; 110, Intermediate Pipe Assembly; 120, End Pipe Assembly; 121, Flange; 130, Bellows; 200, Support Cage; 210, Support Rod; 300, Anti-deformation Assembly; 310, Fixing Frame; 320, End Face Linkage Assembly; 321, Right Angle Plate; 322, Panel; 323, Connector; 330, Guide Support Seat; 331, Slide Rail; 332, Slide Rod One; 400, Energy Absorption Assembly; 410, Connecting Block One; 420, Connecting Block Two; 430, Spring; 431, Slide Rod Two; 500, Force Transmission Assembly; 510, Rotating Rod; 520, Pull Rope One; 530, Pull Rope Two; 600, Damping Assembly; 610, Damping Chamber; 620, Baffle; 630, Paddle Plate; 700, Diamond Bracket; 800, Cross Bracket. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0018] Example This embodiment describes an ultra-large diameter anti-negative-pressure rectangular compensator for condensers, applied at the connection between the turbine and condenser in thermal power generation, with a pipe cross-sectional area of ​​80m². 2 It is used to resist the suction of corrugated sections and pipe deformation caused by negative pressure inside the pipe under full vacuum conditions.

[0019] Figure 1 A schematic diagram of the structure of an ultra-large diameter anti-negative pressure rectangular compensator for condensers is shown. Figure 1The condenser uses an ultra-large diameter negative pressure resistant rectangular compensator, which includes a compensator body 100, a support cage 200 surrounding the compensator body 100, and at least one set of anti-deformation components 300 connected in series on the support cage 200. The compensator body 100 serves as a medium channel connecting the turbine and the condenser, with both ends connected to the turbine and the condenser, respectively. The support cage 200 serves as a support component for fixing the anti-deformation components 300 from the outside, providing the basic conditions for the anti-deformation components 300 to resist the deformation of the compensator body 100.

[0020] Figure 2 A schematic diagram of the compensator body 100 is shown; Figure 2 In the compensator body 100, there are intermediate pipe assembly 110, end pipe assembly 120 connected to both ends of intermediate pipe assembly 110, and bellows 130 connecting intermediate pipe assembly 110 and end pipe assembly 120. Both end pipe assemblies 120 have radially extending flanges 121, and the support cage 200 is erected between the two flanges 121. End pipe assembly 120 is a "transition section" for docking with the equipment. Its end is connected to the flange bolts of the turbine and condenser through flanges 121 to achieve sealing and fixation. Bellows 130 is a flexible compensation component with a retractable corrugated structure. When the turbine / condenser undergoes axial displacement or radial offset due to temperature changes during operation, bellows 130 can absorb the displacement through its own expansion, contraction, and bending, avoiding stress caused by the hard connection between intermediate pipe assembly 110 and the equipment. Intermediate pipe assembly 110 is the "main channel" for medium flow. Its outer wall is in contact with the anti-deformation component 300 and directly bears the supporting force of the anti-deformation component 300.

[0021] Figure 3 A structural schematic diagram of the support cage 200 is shown; Figure 3 In the structure, the support cage 200 includes multiple support rods 210 evenly surrounding the compensator body 100. The support rods 210 are made of high-strength metal rods and are evenly distributed around the circumference of the compensator body 100, such as one rod on each of the four sides and corners of a rectangular pipe. The two ends are welded or bolted to the flanges 121 at both ends to form a "cage-like frame". When the anti-deformation component 300 is subjected to the reaction force generated by negative pressure, the support rods 210 will evenly transfer the force to the flanges 121, and then to the equipment shell of the turbine / condenser through the flanges 121. This prevents the local installation point of the anti-deformation component 300 from being subjected to excessive force and breaking, so as to evenly distribute the force transferred by the anti-deformation component 300 to the entire support cage 200, and then to the equipment docking end through the flanges 121 to avoid local overload.

[0022] Figure 4 A structural schematic diagram of the anti-deformation component 300 is shown; Figure 4In the process, the anti-deformation component 300 includes a fixing frame 310, an end-face linkage component 320, and a guide support 330. The fixing frame 310 is fixed to the support cage 200. One end of the guide support 330 is connected to the inner side of the fixing frame 310, and the other end presses against the outer side of the intermediate pipe assembly 110. The end-face linkage component 320 is disposed in the gap between the fixing frame 310 and the intermediate pipe assembly 110, and is connected to the four end faces of the intermediate pipe assembly 110 respectively. The fixing frame 310 is a "mounting base," fixed to the support rod 210 of the support cage 200 by bolts to ensure that the anti-deformation component 300 does not shift as a whole. The guide support 330 is... The "extension component" provides stable support for the movement of the end face linkage assembly 320. The end face linkage assembly 320 is a "synchronous deformation control component" composed of multiple sets of linkage structures, which are respectively connected to the four end faces of the intermediate pipe assembly 110 by bolts. When one end face bulges inward due to negative pressure, it will pull the corresponding linkage of the end face linkage assembly 320. This linkage will then drive the linkages of the other three end faces, forcing the other three end faces to deform synchronously, avoiding excessive bulging of a single end face. Thus, the "active deformation" of the other three end faces is used to share the negative pressure that causes the "passive deformation" of the end face, preventing irreversible local excessive deformation in the cross-section of the intermediate pipe assembly 110.

[0023] Figure 5 A schematic diagram of the end face linkage assembly 320 is shown; Figure 5 In the middle, the end face linkage component 320 includes a right angle plate 321, a panel 322, and a connector 323, and each of the three is provided with four sets. The right angle plate 321 corresponds to the corner of the intermediate pipe assembly 110, the panel 322 corresponds to the end face of the intermediate pipe assembly 110, and the connector 323 is connected between the middle of the end face of the intermediate pipe assembly 110 and the panel 322. The right angle plate 321 and the panel 322 are slidably connected.

[0024] When one end face of the intermediate connecting pipe assembly 110 is concave, the panel 322 corresponding to that end face moves inward and simultaneously drives the two adjacent right-angle plates 321 to move inward. Since the movement trajectory of the right-angle plates 321 is restricted, when the right-angle plates 321 move towards the center of the intermediate connecting pipe assembly 110, they can drive the two sets of panels 322 that are slidably connected to the right-angle plates 321 to move synchronously towards the intermediate connecting pipe assembly 110. This achieves a regular inward change of the end face linkage assembly 320, that is, the four sets of panels 322 move synchronously towards the intermediate connecting pipe assembly 110, thereby ensuring that the four end faces of the intermediate connecting pipe assembly 110 undergo uniform deformation.

[0025] Figure 6 A structural schematic diagram of the inner surface of the guide support 330 is shown; the inner surface of the guide support 330 refers to the end face facing the end face linkage assembly 320, and the opposite is the outer surface of the guide support 330. Figure 6 In the middle, a slide rail 331 is provided on the guide support seat 330, and a slide rod 332 is slidably arranged in the slide rail 331. The slide rod 332 is connected to the right angle plate 321 to guide the right angle plate 321 to move along the trajectory of the slide rod 332. The slide rod 332 is located on the extension line of the diagonal of the intermediate pipe assembly 110.

[0026] The slide rail 331 is a "guide groove" whose opening direction is along the diagonal extension of the intermediate connecting pipe assembly 110, such as the diagonal direction of a rectangular pipe from the upper left corner to the lower right corner, ensuring that the slide rod 332 and the right angle plate 321 slide in the preset direction; the slide rod 332 is a "linkage transmission rod", which is a cylindrical metal rod. One end of it is welded to the middle of the right angle plate 321, and the other end is inserted into the slide rail 331, which can slide freely along the slide rail; when the right angle plate 321 moves with the deformation of the intermediate connecting pipe, it will drive the slide rod 332 to slide along the slide rail 331. Through the limiting effect of the slide rail, it is ensured that the right angle plate 321 can only move in the set direction, so as to simultaneously drive the two panels 322 adjacent to the right angle plate 321 to move.

[0027] Figure 7 A schematic diagram of the outer side of the guide support 330 is shown; Figure 7 In the middle, an energy-absorbing component 400 is provided on the outer surface of the guide support 330. The energy-absorbing component 400 includes a connecting block 1 410, a connecting block 2 420, and a spring 430. The connecting block 1 410 is connected to the guide support 330, the connecting block 2 420 is connected to the corner of the intermediate pipe assembly 110, and the spring 430 is connected between the connecting block 1 410 and the connecting block 2 420. When the intermediate pipe assembly 110 is deformed by the internal negative pressure, the connecting block 2 420 moves toward the intermediate pipe assembly 110 and pulls the spring 430 to deform in order to absorb the negative pressure. When the intermediate pipe assembly 110 is deformed inward by the negative pressure, its corner will drive the connecting block 2 420 to move inward, increasing the distance between the connecting block 1 410 and the connecting block 2 420. The spring 430 is stretched, converting the "deformation kinetic energy" generated by the negative pressure into the "elastic potential energy" of the spring, thereby consuming part of the negative pressure energy and reducing the degree of deformation of the intermediate pipe.

[0028] Figure 6 Combination Figure 7A force transmission component 500 is provided between the anti-deformation component 300 and the energy absorption component 400. The force transmission component 500 includes a rotating rod 510, a pull rope 1 520, and a pull rope 2 530. The rotating rod 510 is rotatably mounted on the guide support seat 330. The pull rope 1 520 is wound clockwise around the rotating rod 510, and the other end is connected to the slide rod 1 332. The pull rope 2 530 is wound counterclockwise around the rotating rod 510, and the other end is connected to the connecting block 1 410. The connecting block 1 410 is slidably connected to the slide rail 331 through the slide rod 2 431. When the middle part of the intermediate pipe assembly 110 deforms inward, the connecting block 1 410 pulls the corner of the intermediate pipe assembly 110 outward to resist the deformation and transfers the pressure in the middle part of the intermediate pipe assembly 110 to the corner of the intermediate pipe assembly 110.

[0029] When the middle part of the intermediate connecting pipe assembly 110 deforms inward due to internal negative pressure, it will drive the sliding rod 332 connected to it to slide inward along the slide rail 331; the sliding rod 332 pulls the pull rope 520, and since the pull rope 520 is wound clockwise around the rotating rod 510, it will drive the rotating rod 510 to rotate clockwise on the guide support seat 330; when the rotating rod 510 rotates, since the pull rope 530 is wound counterclockwise around the rotating rod 510, it will pull the pull rope 530, thereby driving the connecting block 410 to slide outward along the slide rail 331; when the connecting block 410 slides outward, the spring 4 of the energy absorption assembly will... The 30-pulling connecting block 420 pulls outward to the corner of the intermediate pipe assembly 110, realizing the transmission and direction conversion of force. Through the linkage design of the rotating rod and the pulling rope, the concentrated negative pressure stress in the middle of the intermediate pipe assembly 110 is cleverly transferred to the corner with higher structural strength. The corner's anti-deformation ability is used to share the pressure, effectively reducing the risk of damage to the middle due to excessive deformation. This further improves the overall anti-negative pressure performance of the compensator, makes the force distribution more reasonable, enhances the stability of the structure, and further expands the elastic deformation degree of the spring 430, thus doubling the energy absorption effect.

[0030] Figure 8 A schematic diagram of the damping component 600 is shown. Figure 8 In the middle, a damping assembly 600 is also provided outside the rotating rod 510. The damping assembly 600 includes a damping cavity 610, a baffle 620 and a paddle 630. The damping cavity 610 is opened in the guide support seat 330 and is coaxially arranged outside the rotating rod 510. The damping cavity 610 is filled with a damping medium. The baffle 620 is fixedly arranged in the damping cavity 610. The paddle 630 is movably arranged in the damping cavity 610 and connected to the rotating rod 510. The paddle 630 has a damping hole for the medium to pass through. When the rotating rod 510 rotates, the paddle 630 squeezes the medium and forces it to flow through the damping hole to absorb energy.

[0031] The damping assembly 600 is filled with high-viscosity hydraulic oil. When the rotating rod 510 rotates due to negative pressure, the paddle 630 rotates in the damping cavity 610, squeezing the damping medium and forcing the medium to flow slowly through the damping hole of the paddle. The viscous damping force generated during the flow of the medium hinders the rotation of the paddle, thereby converting the kinetic energy of the rotating rod into energy and consuming it, thus absorbing the negative pressure energy. At the same time, the damping effect forcibly controls the deformation speed of the intermediate connecting pipe assembly, avoiding irreversible instantaneous deformation of the compensator when the negative pressure fluctuates greatly, and improving the stability of the anti-negative pressure process.

[0032] Figure 9 A schematic diagram of the internal structure of the intermediate pipe assembly 110 is shown; Figure 9 In the middle, the intermediate pipe assembly 110 is provided with a diamond-shaped bracket 700 and a cross bracket 800 in sequence. The apex of the diamond-shaped bracket 700 is supported in the middle of the intermediate pipe assembly 110, and the end of the cross bracket 800 is supported on the inner side of the apex of the diamond-shaped bracket 700.

[0033] The apex of the rhomboid support 700 inside the intermediate pipe assembly 110 is supported in the central region, and the end of the cross support 800 is supported inside the apex of the rhomboid support 700, forming a "cross-rhomboid" double internal support structure. When the intermediate pipe assembly 110 is deformed inward under negative pressure, the rhomboid support 700 tends to shrink under compression. The cross support 800 applies a reverse support force from the inside to the apex of the rhomboid support 700 to prevent it from shrinking, thereby resisting the deformation of the intermediate pipe assembly 110. Together with the external anti-deformation component, it forms an internal and external double protection system, strengthening the structural rigidity of the middle part of the intermediate pipe assembly 110 from the inside, effectively solving the problem of easy deformation in the middle of ultra-large diameter pipes, and improving the pressure resistance stability of the pipe under full vacuum conditions.

[0034] In addition, based on the above-mentioned ultra-large diameter anti-negative pressure rectangular compensator for condensers, this embodiment also provides a pressure-resistant method for the ultra-large diameter anti-negative pressure rectangular compensator for condensers, including the following steps: The first step is to use the end face linkage component to drive the four end faces of the intermediate pipe assembly to deform synchronously when the compensator is in full vacuum condition and the intermediate pipe assembly is deformed by the internal negative pressure. The active deformation of the non-deformed end face is used to share the negative pressure force and avoid excessive bulging of a single end face. The second step is that when the intermediate pipe assembly deforms, it pulls the spring of the energy-absorbing assembly. The elastic deformation of the spring converts the deformation kinetic energy generated by the negative pressure into elastic potential energy, thus consuming part of the negative pressure energy. The third step is that when the middle part of the intermediate connecting pipe assembly deforms inward, it drives the slide rod one to slide along the slide and pulls the pull rope one, driving the rotating rod to rotate. The rotating rod pulls the connecting block one to slide outward through the pull rope two, and then pulls the corner of the intermediate connecting pipe assembly through the spring, transferring the concentrated negative pressure stress in the middle to the corner. The fourth step is that when the rotating rod rotates, it drives the damping component's paddle to rotate in the damping cavity, squeezing the damping medium and forcing it to flow through the damping hole. The viscous damping force of the medium consumes the rotating rod's rotational kinetic energy and controls the deformation speed of the intermediate connecting pipe assembly. Fifth, when the intermediate pipe assembly deforms inward, the internal rhomboid support is compressed and tends to shrink. The cross support applies a reverse support force to the apex of the rhomboid support, forming a double protection with the external components to resist the deformation of the intermediate pipe assembly.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A large-diameter anti-negative-pressure rectangular compensator for condensers, comprising an intermediate pipe assembly, end pipe assemblies connected to both ends of the intermediate pipe assembly, and a bellows connecting the intermediate pipe assembly and the end pipe assemblies, characterized in that, Also includes: The mounting bracket is spaced around the outside of the central connecting pipe assembly; A guide support is provided inside the fixed frame. A slide rail is provided on the guide support along the trajectory parallel to the diagonal line of the intermediate pipe assembly. A slide rod is slidably provided in the slide rail. The end face linkage component is disposed between the fixed frame and the intermediate pipe assembly, including a right angle plate and a panel. The number and position of the right angle plate correspond to the corners of the intermediate pipe assembly, and the number and position of the panel correspond to the end face of the intermediate pipe assembly. The panel is slidably inserted into the right angle plate, and the right angle plate is fixedly connected to the slide rod. When one end face of the intermediate pipe assembly is deformed inward due to negative pressure, the other three end faces of the intermediate pipe assembly deform synchronously through the end face linkage component.

2. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 1, characterized in that, It also includes an energy-absorbing component, which comprises: Connecting block one is connected to the guide support seat; Connecting block two is connected to the corner of the intermediate pipe assembly; And a spring, connected between connecting block one and connecting block two; When the intermediate connecting pipe assembly deforms due to internal negative pressure, the connecting block one and connecting block two move away from each other and pull the spring to deform in order to absorb the negative pressure.

3. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 2, characterized in that, It also includes a force transmission component, the force transmission component comprising: The rotating rod is rotatably mounted on the guide support seat; One end of the pull rope is wound clockwise around the rotating rod, and the other end is connected to the right-angle plate; The second pull rope is wound counterclockwise around the rotating rod, and the other end is connected to the first connecting block. The first connecting block is slidably mounted on the guide support seat through the sliding rod and the slide rail. When the slide rod slides under negative pressure interference, the connecting block moves in the opposite direction to the right-angle plate to further deform the spring.

4. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 3, characterized in that: It also includes a damping component, which comprises: A damping cavity is formed inside the guide support and coaxially disposed outside the rotating rod, and the damping cavity is filled with a damping medium; A baffle is fixedly installed inside the damping cavity to prevent the flow of the medium. A paddle is movably disposed within the damping cavity. The paddle is fixedly connected to the rotating rod and has a damping hole for the medium to pass through. When the lever rotates, the paddle squeezes the medium and forces it to flow through the damping orifice to absorb energy.

5. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 3, characterized in that: It also includes a support cage, which comprises multiple support rods evenly surrounding the compensator body.

6. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 5, characterized in that: Both of the end pipe assemblies have radially extending flanges, the support cage is mounted between the two flanges, and the fixing bracket is connected in series on the support cage.

7. The ultra-large diameter anti-negative pressure rectangular compensator for condensers according to claim 6, characterized in that: The intermediate connecting pipe assembly is provided with a diamond-shaped bracket and a cross-shaped bracket in sequence. The apex of the diamond-shaped bracket is supported in the middle of the intermediate connecting pipe assembly, and the end of the cross-shaped bracket is supported inside the apex of the diamond-shaped bracket.

8. The pressure-resistant method for the ultra-large diameter anti-negative-pressure rectangular compensator for condensers according to any one of claims 1-7, characterized in that, Includes the following steps: The first step is to use the end face linkage component to drive the four end faces of the intermediate pipe assembly to deform synchronously when the compensator is in full vacuum condition and the intermediate pipe assembly is deformed by the internal negative pressure. The active deformation of the non-deformed end face is used to share the negative pressure force and avoid excessive bulging of a single end face. The second step is that when the intermediate pipe assembly deforms, it pulls the spring of the energy-absorbing assembly. The elastic deformation of the spring converts the deformation kinetic energy generated by the negative pressure into elastic potential energy, thus consuming part of the negative pressure energy. The third step is that when the middle part of the intermediate connecting pipe assembly deforms inward, it drives the slide rod one to slide along the slide and pulls the pull rope one, driving the rotating rod to rotate. The rotating rod pulls the connecting block one to slide outward through the pull rope two, and then pulls the corner of the intermediate connecting pipe assembly through the spring, transferring the concentrated negative pressure stress in the middle to the corner. The fourth step is that when the rotating rod rotates, it drives the damping component's paddle to rotate in the damping cavity, squeezing the damping medium and forcing it to flow through the damping hole. The viscous damping force of the medium consumes the rotating rod's rotational kinetic energy and controls the deformation speed of the intermediate connecting pipe assembly. Fifth, when the intermediate pipe assembly deforms inward, the internal rhomboid support is compressed and tends to shrink. The cross support applies a reverse support force to the apex of the rhomboid support, forming a double protection with the external components to resist the deformation of the intermediate pipe assembly.

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