High energy pipeline support guard integrated device

Abstract

The present application relates to a kind of high-energy pipeline support protection integrated device, high-energy pipeline support protection integrated device includes frame body, protection plate, fixed pillar and energy absorption element;Frame body is the skeleton of long rectangle, the long side of frame body is longitudinally arranged, the two faces of the width and height of frame body are used to supply high-energy pipeline to be set in frame body, four faces of frame body parallel to high-energy pipeline are set protection plate according to the arrangement of high-energy pipeline, fixed pillar is extended along the long side, width or height of frame body and is set, energy absorption element is connected fixed pillar and civil buried plate;When high-energy pipeline breaks and generates injection or flail to high-energy pipeline support protection integrated device, the load generated by injection or flail is sequentially transmitted to civil buried plate by protection plate, frame body, fixed pillar, energy absorption element.Effectively reduce the support reaction of civil buried plate, while the all-round protection to the protected object can be realized.

Description

High-energy pipeline support and protection integrated device Technical Field

[0001] This invention relates to the field of pipeline protection in nuclear power plants, and more particularly to an integrated device for supporting and protecting high-energy pipelines. Background Technology

[0002] In nuclear power plants, high-energy pipelines refer to any system or component of a system that operates at a maximum pressure exceeding 2 MPa (gauge pressure) or a maximum temperature exceeding 100°C under normal operating conditions. When a high-energy pipeline ruptures, due to the significant pressure difference between the inside and outside of the pipeline, the fluid medium inside will be ejected at high speed from the rupture point into the external environment. Upon encountering surrounding structures, systems, and components (SSCs), the fluid medium will either stagnate or deviate from its initial direction of motion, generating a jetting force effect on the interaction surface (impact plane), damaging the SSCs. To prevent damage to SSCs, jetting protection is required, such as installing jetting prevention devices. Depending on the rupture type and pipeline boundary conditions, there are three main types of assumed jetting flows: circumferential rupture with unconstrained pipe ends, circumferential rupture with constrained pipe ends, and longitudinal rupture.

[0003] One existing technology in nuclear power plants involves installing an anti-jet device between the rupture location and the protected object to prevent fluid jets from impacting the protected object after a high-energy pipeline ruptures. This anti-jet device consists of a baffle, a support structure, embedded plates (including pre-embedded plates and anchor plates), and bolts. According to the "Design Guidelines for Hypothetical Pipeline Failure Accidents in Light Water Reactor Nuclear Power Plants" (NB / T 20516-2018), the rupture location of high-energy pipelines is assumed to be at a high-stress or high-fatigue location. For Class I nuclear safety pipelines, a failure must be assumed if the cumulative fatigue service factor reaches 0.1 (the limit for the cumulative fatigue service factor in pipeline integrity assessment is 1). Therefore, there are numerous hypothetical rupture locations in the design of high-energy pipeline rupture protection in nuclear power plants. On the one hand, this type of blowout preventer (BEP) can generally only protect against a single breach location and a single jet stream type. It becomes ineffective when multiple breaches or jet stream types exist around the protected object. Furthermore, installing one or more BEPs would be limited by the limited space available in nuclear power plants. On the other hand, high-energy pipelines in nuclear power plants operate at pressures up to 15 MPa and have diameters of up to 800 mm, resulting in jet stream impact forces reaching hundreds or even thousands of tons. High-energy pipeline rupture protection design can only be implemented after the pipeline system layout is complete, typically in the later stages of the design phase. Therefore, under jet stream impact loads in the hundreds of tons range, the supporting reaction forces of the BEP's embedded plates and bolts are also in the hundreds of tons range, making the design extremely difficult.

[0004] Another existing technology in nuclear power plants involves installing ejection shields at the rupture site to prevent fluid jets from impacting the protected object after a high-energy pipeline ruptures. This ejection shield consists of a surrounding plate, a support structure, embedded plates (including pre-embedded plates and anchor plates), and bolts. It can protect against circumferential and longitudinal ejection flows from ruptured pipelines with constrained ends, but not from circumferential ejection flows from unconstrained pipelines. Nuclear power plants have numerous components, and ejection shields are generally large, occupying significant space. High-energy pipeline welds typically require in-service inspections, necessitating the removal of the ejection shield's surrounding plate before these inspections can be performed, complicating maintenance and repair. Furthermore, under ejection flow impact loads in the hundreds of tons range, the supporting reaction forces of the ejection shield's embedded plates and bolts are also in the hundreds of tons range, making its design extremely challenging. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an integrated device for supporting and protecting high-energy pipelines.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a high-energy pipeline support and protection integrated device is constructed, including a frame body, a protective plate, a fixed support column, and an energy absorption element; the frame body is a cuboid skeleton with its long side longitudinally arranged, and the two faces formed by the wide side and the high side of the frame body are used for the high-energy pipeline to pass through the frame body; the protective plate is set on the four faces of the frame body parallel to the high-energy pipeline according to the arrangement of the high-energy pipeline; the fixed support column extends along the long side, wide side, or high side of the frame body; and the energy absorption element connects the fixed support column and the civil engineering embedded plate.

[0007] When the high-energy pipeline ruptures and generates a jet or impact that hits the high-energy pipeline support and protection integrated device, the load generated by the jet or impact is sequentially transferred to the civil engineering embedded plate through the protective plate, the frame body, the fixed support, and the energy absorption element.

[0008] Preferably, the load that the energy absorption element needs to withstand is determined using equations (1) and (2).

[0009]

[0010]

[0011] in:

[0012] E1: Energy generated by the impact force of jetting or flailing, in J;

[0013] l1: Deformation length of the energy absorption element, mm;

[0014] f1(t): The time function of the jetting or swaying impact force, obtained through calculation or experiment, kN;

[0015] E2: Strain energy of the energy-absorbing element, J;

[0016] f2(l): Deformation function of the force of the energy absorbing element, obtained through experiments, kN;

[0017] By combining equations (1) and (2) to make E1 = E2, the deformation length l1 of the energy absorption element can be obtained. Then, by substituting l1 into the deformation function of the force of the energy absorption element, the corresponding load that the energy absorption element needs to bear can be obtained.

[0018] Preferably, the main body of the frame is a square steel beam or an I-beam steel beam.

[0019] Preferably, a horizontal dividing support parallel to the height side is provided between adjacent wide sides.

[0020] Preferably, the horizontal dividing post is fixed to the wide side by welding.

[0021] Preferably, the horizontal dividing support is a square steel beam or an I-beam steel beam.

[0022] Preferably, a vertical dividing pillar parallel to the wide side is provided between the horizontal dividing pillar and the high side.

[0023] Preferably, the vertical dividing post is fixed between the horizontal dividing post and the high side by welding.

[0024] Preferably, the vertical dividing support is a square steel beam or an I-beam steel beam.

[0025] Preferably, sufficient gaps are provided between the frame body, horizontal partition pillars, vertical partition pillars, and protective plates and the high-energy pipeline.

[0026] Preferably, the protective plate is bolted to the frame body.

[0027] Preferably, the energy-absorbing element is a honeycomb steel tube.

[0028] Preferably, the energy absorption element and the civil engineering embedded plate are connected by a steel structure frame.

[0029] The implementation of this invention has the following beneficial effects: The high-energy pipeline support and protection integrated device of this invention is installed on the protected object, providing protection against all breaches and all types of jet streams and their additional effects around the protected object, achieving all-round protection. It is particularly suitable for objects sensitive to jet stream impacts, such as cables, instrument pipes, and valve drive mechanisms. Through the plastic deformation of the energy absorption element, the supporting reaction force of the anti-jet device on the embedded plate is effectively reduced. It simultaneously possesses support and fracture protection functions, significantly saving layout space. By setting a plastically deformable protective plate, it achieves anti-throwing effect. It provides a simplified energy balance method, improving calculation efficiency and facilitating engineering applications. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0031] Figure 1 is a structural schematic diagram of the high-energy pipeline support and protection integrated device of the present invention;

[0032] Figure 2 is a structural schematic diagram of the fixed support, energy absorption element and civil engineering embedded plate of the present invention. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0034] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0035] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0036] Figures 1 and 2 illustrate a high-energy pipeline support and protection integrated device in some embodiments of the present invention. This device can be used to provide support and all-round protection for high-energy pipelines. It may include a frame body 1, protective plates 13, fixed supports 14, and energy absorption elements 15. The frame body 1 is a cuboid skeleton with its long side extending longitudinally. The two faces formed by the wide side and the high side of the frame body 1 are used for the high-energy pipeline to pass through the frame body 1. The four faces of the frame body 1 parallel to the high-energy pipeline are provided with protective plates 13 according to the arrangement of the high-energy pipeline. The fixed supports 14 extend along the long side, wide side, or high side of the frame body 1. The energy absorption elements 15 connect the fixed supports 14 and the civil engineering embedded plate 2.

[0037] When a high-energy pipeline ruptures and generates a jet or impact that hits the high-energy pipeline support and protection integrated device, the load generated by the jet or impact is sequentially transferred to the civil engineering embedded plate 2 through the protective plate 13, the frame body 1, the fixed support column 14, and the energy absorption element 15.

[0038] In some embodiments, a horizontal dividing pillar 11 parallel to the high side is provided between adjacent wide sides, and a vertical dividing pillar 12 parallel to the wide side is provided between the horizontal dividing pillar 11 and the high side. The horizontal dividing pillar 11 divides the frame body 1 into two spaces in the horizontal direction to accommodate two different high-energy pipes. The vertical dividing pillar 12 divides the frame body 1 into two spaces in the vertical direction to accommodate two different high-energy pipes. The horizontal dividing pillar 11 and the vertical dividing pillar 12 are correspondingly arranged at the high-energy pipe entry and exit ends of the frame body 1, so that each high-energy pipe is parallel to each other in the frame body 1. It can be understood that the specific position and number of the horizontal dividing pillar 11 and the vertical dividing pillar 12 can be determined according to the size and number of high-energy pipes to be installed. Preferably, the frame body 1, the vertical dividing pillar 12, and the horizontal dividing pillar 11 are square steel beams or I-beams welded together. Preferably, based on the size and number of high-energy pipes to be installed, sufficient gaps are provided between the frame body 1, horizontal partition pillars 11, vertical partition pillars 12, and protective plates 13 and the high-energy pipes so as not to affect the normal operation of the high-energy pipes.

[0039] In some embodiments, the protective plate 13 may be made of stainless steel. Depending on the arrangement of high-energy pipelines around the protected object, it is fixed to one, two, three, or four sides of the frame body 1 parallel to the high-energy pipelines using bolts or other methods. The bolt anchoring method facilitates the removal of the protective plate, thus meeting requirements such as in-service inspection of the protected object, including weld inspection. The protective plate 13 is used to protect against the impact effect of jet streams, protecting the protected object from the influence of various types of jet streams. It also has a throw-off protection function; when a broken pipeline throws off the protective plate, the plastic deformation of the protective plate can absorb some of the throw-off energy, and then transfer the throw-off load to the frame body 1. Preferably, the protective plate is made of 304L or 316L stainless steel.

[0040] In some embodiments, the fixed support column 14 may be a metal profile structure, with one end connected to the frame body 1 by welding, and the sidewall of the other end connected to the energy absorption element 15 by welding. The fixed support column 14 is used to transfer the jet or impact load generated by the rupture of the high-energy pipeline from the frame body 1 to the energy absorption element 15 through itself. Understandably, the extension direction and number of fixed supports 14 can be determined according to the specific location of the civil engineering embedded plate 2.

[0041] In some embodiments, the energy-absorbing element 15 may be a honeycomb steel pipe, with one end welded to the side wall of the fixed support 14 and the other end fixedly connected to the civil engineering embedded plate 2. The energy-absorbing element 15 is used to transfer the jet or impact load generated by the rupture of the high-energy pipeline from the fixed support 14 to the civil engineering embedded plate 2. Preferably, depending on the actual arrangement position of the civil engineering embedded plate 2, the energy-absorbing element 15 and the civil engineering embedded plate 2 can be connected by a steel structure frame, so that the load generated by the jet or impact is sequentially transferred to the civil engineering embedded plate 2 through the protective plate 13, the frame body 1, the fixed support 14, the energy-absorbing element 15, and the connected steel structure frame. It can be understood that in some other embodiments, the energy-absorbing element 15 may also be connected to the frame body 1 by welding at one end and fixedly connected to the civil engineering embedded plate 2 at the other end, or connected to the civil engineering embedded plate 2 through a steel structure frame.

[0042] In some embodiments, to avoid complex elastoplastic dynamics analysis, the load that the energy absorption element 15 needs to withstand can be determined using equations (1) and (2).

[0043]

[0044]

[0045] in:

[0046] E1: Energy generated by the impact force of jetting or flailing, in J;

[0047] l1: Deformation length of energy absorption element 15, mm;

[0048] f1(t): The time function of the jetting or swaying impact force, obtained through calculation or experiment, kN;

[0049] E2: Strain energy of the energy-absorbing element, J;

[0050] f2(l): Deformation function of the force of the energy absorbing element, obtained through experiments, kN;

[0051] By combining equations (1) and (2) to make E1 = E2, the deformation length l1 of the energy absorption element can be obtained. Then, by substituting l1 into the deformation function of the force of the energy absorption element, the corresponding load that the energy absorption element needs to bear can be obtained.

[0052] To make the objectives, technical solutions, and technical effects of the present invention clearer, the following will take a honeycomb steel tube with a diameter of 233 mm, a wall thickness of 20 mm, a hole diameter of 29 mm, a hole layer of 6, a vertical hole spacing of 37.5 mm, and a horizontal hole spacing of 30° as an example to further describe the embodiments of the present invention.

[0053] The time function of the jetting or swaying impact force was tested on a section of high-energy pipeline that needs protection, and f1(t) was obtained. Then, f1(t) was substituted into equation (1) to obtain the test result of E1. The test results are listed in Table 1.

[0054] Table 1. Energy generated by jetting or swaying impact force

[0055]

[0056]

[0057] The load-deformation relationship of the selected cellular steel pipe was measured to obtain f2(l), and the test results are listed in Table 2. Substituting f2(l) into equation (2) yields the test results of E2, and the test results are listed in Table 3.

[0058] Table 2 Load-deformation relationship of honeycomb steel pipes

[0059]

[0060] Table 3 Deformation Energy of Honeycomb Steel Pipes

[0061]

[0062]

[0063] Combining equations (1) and (2), we obtain E1 = E2 = 252506.85 J. Therefore, the deformed length of the honeycomb steel tube is 175.98 mm, and the load it can withstand is 1534.25 kN. Thus, the honeycomb steel tube can be used as the energy absorption element 15 of this invention.

[0064] The implementation of this invention has the following beneficial effects: The high-energy pipeline support and protection integrated device of this invention is installed on the protected object, providing protection against all breaches and all types of jet streams and their additional effects around the protected object, achieving all-round protection. It is particularly suitable for objects sensitive to jet stream impacts, such as cables, instrument pipes, and valve drive mechanisms. Through the plastic deformation of the energy absorption element, the supporting reaction force of the anti-jet device on the embedded plate is effectively reduced. It simultaneously possesses support and fracture protection functions, significantly saving layout space. By setting a plastically deformable protective plate, it achieves anti-throwing effect. It provides a simplified energy balance method, improving calculation efficiency and facilitating engineering applications.

[0065] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A high-energy pipeline support and protection integrated device, characterized in that, The system includes a frame body (1), protective plates (13), fixed supports (14), and energy absorption elements (15). The frame body (1) is a cuboid skeleton with its long side extending longitudinally. Two faces of the frame body (1) formed by its wide and high sides are used for high-energy pipes to pass through the frame body (1). The protective plates (13) are installed on the four faces of the frame body (1) parallel to the high-energy pipes, depending on the arrangement of the high-energy pipes. The fixed supports (14) extend along the long, wide, or high sides of the frame body (1). The energy-absorbing element (15) connects the fixed support (14) and the civil engineering embedded plate (2); when the high-energy pipeline ruptures and generates a jet or impact on the high-energy pipeline support and protection integrated device, the load generated by the jet or impact is sequentially transferred to the civil engineering embedded plate (2) through the protective plate (13), the frame body (1), the fixed support (14), and the energy-absorbing element (15); the energy-absorbing element (15) is a honeycomb steel pipe, and the load that the energy-absorbing element (15) needs to bear is determined by formulas (1) and (2). （1） (2) Wherein: Energy generated by the impact of jetting or swaying, in J; : Deformation length of energy absorption element (15), mm; : The time function of the jetting or swaying impact force, obtained through calculation or experiment, kN; The deformation energy of the energy absorption element (15), J; The deformation function of the force of the energy absorption element (15) is obtained through experiment, kN; by combining equations (1) and (2) to make E1=E2, the deformation length l1 of the energy absorption element (15) can be obtained. Then, l1 is substituted into the deformation function of the force of the energy absorption element (15) to obtain the corresponding load that the energy absorption element (15) needs to bear.

2. The high-energy pipeline support and protection integrated device according to claim 1, characterized in that, The main frame (1) is a square steel beam or an I-beam steel beam.

3. The high-energy pipeline support and protection integrated device according to claim 1, characterized in that, A horizontal dividing pillar (11) parallel to the height side is provided between adjacent wide sides.

4. The high-energy pipeline support and protection integrated device according to claim 3, characterized in that, The horizontal dividing support (11) is fixed to the wide side by welding.

5. The high-energy pipeline support and protection integrated device according to claim 3, characterized in that, The horizontal dividing support (11) is a square steel beam or an I-beam steel beam.

6. The high-energy pipeline support and protection integrated device according to claim 3, characterized in that, A vertical dividing pillar (12) parallel to the wide side is provided between the horizontal dividing pillar (11) and the high side.

7. The high-energy pipeline support and protection integrated device according to claim 6, characterized in that, The vertical dividing pillar (12) is fixed between the horizontal dividing pillar (11) and the high side by welding.

8. The high-energy pipeline support and protection integrated device according to claim 6, characterized in that, The vertical dividing support (12) is a square steel beam or an I-beam steel beam.

9. The high-energy pipeline support and protection integrated device according to claim 8, characterized in that, Sufficient gaps are provided between the frame body (1), horizontal partition pillars (11), vertical partition pillars (12), and protective plate (13) and the high-energy pipeline.

10. The high-energy pipeline support and protection integrated device according to claim 1, characterized in that, The protective plate (13) is bolted to the frame body (1).

11. The high-energy pipeline support and protection integrated device according to claim 1, characterized in that, The energy absorption element (15) and the civil engineering embedded plate (2) are connected by a steel structure frame.

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