Connecting mechanism, air cooling unit and modification method of air cooling unit based on connecting mechanism

Abstract

The invention provides a connecting mechanism, an air cooling unit and a modification method of the air cooling unit based on the connecting mechanism. The connecting mechanism comprises a tube plate and a connecting assembly. A plurality of through grooves distributed at intervals are formed in the tube plate; the connecting assembly comprises a plurality of connecting pieces; a circulation channel is arranged in each connecting piece, the first end of each connecting piece is fixedly connected with the tube plate, and the circulation channel of each connecting piece corresponds to one through groove; the second end of each connecting piece is used for being connected with an air cooling tube bundle, the distance between the adjacent connecting pieces is consistent with the distance between the air cooling tube bundles, and the tube plate is used for being connected with a condensation box; the connecting piece comprises a deformation compensation part, and the deformation direction of the deformation compensation part is the same as the flowing direction of fluid in the air cooling pipe bundle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam air cooling systems, in particular to a connecting mechanism, an air cooling unit and a retrofit method of the air cooling unit based on the connecting mechanism. BACKGROUND

[0002] A direct air cooling system (ACC) is composed of multiple air cooling units in multiple rows and multiple columns according to the size of the unit capacity, each air cooling unit includes an air cooling tube bundle, and the steam discharged by the steam turbine is condensed by releasing heat to the atmosphere through the air cooling tube bundle; wherein the air cooling tube bundle can be a parallel flow tube bundle and a counter flow tube bundle, when the direct air cooling system is running, the steam discharged by the steam turbine is distributed to the parallel flow tube bundle through the steam distribution pipe, the steam flows from the upper part to the lower part of the parallel flow tube bundle, most of the steam is condensed in the tube bundle unit during this process, and the condensed water flows into the collecting pipe; in addition, a small part of the steam flows into the counter flow tube bundle from the bottom collecting pipe and condenses during the upward flow process, and the condensed water flows back to the collecting pipe under the action of gravity, wherein the non-condensed gas is collected at the top of the counter flow tube bundle and discharged from the extraction port.

[0003] In the prior art, both the parallel flow tube bundle and the counter flow tube bundle will undergo the process of steam condensation; however, the temperature of the steam will change dramatically during the condensation process, especially when the machine is started and stopped in winter, at which time the temperature change is the largest, when the temperature in the air cooling tube bundle changes dramatically, the air cooling tube bundle will expand or shrink, and during the expansion or shrinkage of the air cooling tube bundle, the weld at the connection position in the air cooling tube bundle will be pulled apart, and even the air cooling tube bundle and the steam distribution pipe will be broken, thereby causing steam leakage, affecting the operation efficiency of the overall system and wasting resources, and the maintenance cost is high. SUMMARY

[0004] The purpose of the present application is to provide a connecting mechanism, an air cooling unit and a retrofit method of the air cooling unit based on the connecting mechanism, to solve the problem of the current air cooling tube bundle being pulled apart and broken due to collision and shrinkage under the condition of dramatic temperature change, thereby causing resource waste and high maintenance cost of the air cooling system.

[0005] In a first aspect, the application provides a connecting mechanism for connecting air cooling tube bundles in an air cooling unit, the air cooling unit comprising a condenser box and a plurality of air cooling tube bundles arranged at intervals; the connecting mechanism comprising a tube plate and a connecting assembly; the tube plate being provided with a plurality of through grooves arranged at intervals; the connecting assembly comprising a plurality of connecting pieces; each connecting piece being internally provided with a flow passage; a first end of each connecting piece being fixedly connected to the tube plate, and the flow passage of each connecting piece corresponding to a through groove; a second end of each connecting piece being used for connecting to an air cooling tube bundle; the spacing between adjacent connecting pieces being consistent with the spacing of the air cooling tube bundles; the tube plate being used for connecting to the condenser box; wherein the connecting piece comprises a compensation deformation part, and the deformation direction of the compensation deformation part is the same as the fluid flow direction in the air cooling tube bundle.

[0006] The connecting mechanism designed above is composed of a tube plate and a plurality of connecting pieces arranged on the tube plate; a first end of each connecting piece is fixedly connected to the tube plate, and the flow passage of each connecting piece corresponds to a through groove; a second end of each connecting piece is connected to an air cooling tube bundle; thus, the expansion and contraction of the corresponding connected air cooling tube bundle can be compensated by the compensation deformation part arranged on each connecting piece, that is, when the air cooling tube bundle expands or contracts by itself, the compensation deformation part of the connecting piece can be deformed to compensate so that the air cooling tube bundle will not squeeze or pull the connection position of itself; at the same time, the connecting mechanism designed in the present scheme is composed of a tube plate and a plurality of connecting pieces arranged on the tube plate, which are combined as a whole; thus, the connecting mechanism does not need to repeatedly align each air cooling tube bundle during installation, but can be installed and welded as a whole at one time, thereby improving the installation efficiency of the connecting mechanism that can compensate the expansion and contraction of the air cooling tube bundle.

[0007] In an optional implementation of the first aspect, the connecting piece further comprises a connecting piece body; the compensation deformation part is arranged on the connecting piece body; a first end of the connecting piece body is fixedly connected to the tube plate; a second end of the connecting piece body is used for fixedly connecting to the air cooling tube bundle; and the flow passage penetrates through the first end and the second end.

[0008] In the above implementation, the compensation deformation part is arranged on the connecting piece body and integrally formed with the connecting piece body, so that the connecting piece body and the compensation deformation part have no connecting gap, thereby improving the firmness of the compensation deformation part and the connecting piece body.

[0009] In an optional implementation of the first aspect, the area of the cross section of the second end of the connecting piece body is greater than the area of the cross section of the air cooling tube bundle; the air cooling tube bundle is embedded in the second end of the connecting piece body; wherein the cross section is a cross section perpendicular to the fluid flow direction in the air cooling tube bundle.

[0010] In the above embodiment, the second end of the connecting member body is designed to have a cross-sectional area larger than that of the air-cooled tube bundle, so that the air-cooled tube bundle can be inserted into the connecting member body, and then the fillet weld is formed, thereby reducing the difficulty of welding and improving the efficiency of welding.

[0011] In an optional embodiment of the first aspect, the connecting deformation portion comprises a corrugated deformation segment; the corrugated deformation segment comprises a flow passage formed in a curved structure; the flow passage of the corrugated deformation segment is in communication with the flow passage of the connecting member body, and the corrugated deformation segment has the same corrugated deformation extension direction as the fluid flow direction in the air-cooled tube bundle.

[0012] In an optional embodiment of the first aspect, the number of corrugations in the corrugated deformation segment is any integer from 2 to 5.

[0013] In the above embodiment, the number of corrugations in the corrugated deformation segment is any integer from 2 to 5, so that the compensator has better flexibility, and the stress distribution of the compensator during operation is more uniform, the stress in the piping system is dispersed to more positions, and the air-cooled tube bundle deformation compensation capability is further improved.

[0014] In the second aspect, the application provides an air-cooled unit, which comprises a plurality of air-cooled tube bundles arranged at intervals, a condensing tank, a steam input tank, and the connecting mechanism of any optional embodiment of the first aspect; wherein the first end of each air-cooled tube bundle is connected with the steam input tank, and the second end of each air-cooled tube bundle is connected with the condensing tank through one connecting member of the connecting mechanism and a tube plate.

[0015] The air-cooled unit designed above, because it contains the connecting mechanism described above, the air-cooled unit with the connecting mechanism can utilize the deformation compensation of the connecting mechanism to make the air-cooled tube bundle in the air-cooled unit not expand or shrink, or even crack, due to temperature changes, thereby significantly improving the reliability of the air-cooled unit.

[0016] In a third aspect, the application provides a retrofit method of a connection mechanism-based air cooling unit, the air cooling unit comprising a tube bundle array, a condensing box and a steam input box, the connection mechanism being the connection mechanism of any of the optional embodiments of the first aspect, wherein the distance between adjacent connection pieces in the connection mechanism is consistent with the distance between tube bundles in the tube bundle array; the method comprising: at a preset distance from the connection between the air cooling tube bundle array and the condensing box, performing flush cutting on all air cooling tubes of the air cooling tube bundle array, and performing cutting on a preset area of the upper end face of the condensing box to obtain a cutting body; wherein the preset area is matched in size with the area of the tube plate of the connection mechanism; removing the cutting body; setting the tube plate of the connection mechanism in the preset area, and setting the plurality of connection pieces towards the direction of the cut air cooling tubes; welding the tube plate and the cutting part on the condensing box; and welding the plurality of connection pieces and the cut air cooling tubes.

[0017] The retrofit method of the connection mechanism-based air cooling unit described above, the present application first performs flush cutting on all air cooling tubes of the air cooling tube bundle array at a preset distance from the connection between the air cooling tube bundle array and the condensing box, and performs cutting on a preset area of the upper end face of the condensing box to obtain a cutting body, then removes the cutting body, after removing the cutting body, sets the tube plate of the connection mechanism in the preset area on the condensing box, and sets the plurality of connection pieces towards the direction of the cut air cooling tubes, since the preset area on the condensing box is matched with the tube plate, and the distance between the plurality of connection pieces on the connection mechanism is the same as the distance between the air cooling tubes, the plurality of connection pieces on the connection mechanism are fixedly connected with the tube plate, so that since the positions of the plurality of connection pieces of the connection mechanism relative to the tube plate are fixed, the distance between the plurality of connection pieces is the same as the distance between the air cooling tubes, in the case that the tube plate is set in the preset area on the condensing box and the tube plate is aligned with the preset area, the plurality of connection pieces on the connection mechanism are also aligned one by one with the plurality of cut air cooling tubes, so that the present application does not need to separately cut, disassemble and add connection pieces one by one by alignment and welding for each air cooling tube, and further significantly improves the efficiency of installation of the connection mechanism and saves labor costs under the condition that the air cooling unit is retrofitted to increase the connection mechanism to prevent the air cooling tubes from expanding or shrinking or even cracking due to temperature changes, and significantly improves the reliability of the air cooling unit.

[0018] In an optional embodiment of the third aspect, the distance from the edge of the preset area to the closest air cooling tube is equal to the distance from the edge of the tube plate to the closest connection piece.

[0019] In an optional implementation of the third aspect, the area of the cross section of the connecting piece is greater than the area of the cross section of the air-cooled tube bundle, wherein the cross section represents a cross section perpendicular to the direction of fluid flow in the air-cooled tube bundle; and the welding of the plurality of connecting pieces to the cut air-cooled tube bundles comprises: inserting the cut part of each air-cooled tube bundle in the array of air-cooled tube bundles into a corresponding connecting piece, and welding the interface between each air-cooled tube bundle and the connecting piece.

[0020] In the above implementation, the cut part of each air-cooled tube bundle in the array of air-cooled tube bundles is inserted into a corresponding connecting piece, and then the interface between each air-cooled tube bundle and the connecting piece is welded, thereby avoiding butt welding of the air-cooled tube bundle and the connecting piece, and realizing fillet welding of the air-cooled tube bundle and the connecting piece, so as to reduce the difficulty of welding and improve the efficiency of welding.

[0021] In an optional implementation of the third aspect, the insertion length of the cut part of the air-cooled tube bundle into the corresponding connecting piece ranges from 1 mm to 30 mm.

[0022] In an optional implementation of the third aspect, the array of tube bundles comprises a parallel-flow tube bundle array arranged between the steam input tank and the condensing tank; and the method further comprises: maintaining airtight connection between each parallel-flow tube bundle in the parallel-flow tube bundle array and the steam input tank.

[0023] In an optional implementation of the third aspect, the array of tube bundles comprises a counter-flow tube bundle array arranged between the condensing tank and the steam output pipeline; and the method further comprises: cutting all counter-flow tube bundles in the counter-flow tube bundle array to be flush at a second preset distance from the connection between the counter-flow tube bundle array and the steam output tank; lifting the counter-flow tube bundle array by the second preset distance, and connecting the cut part of the counter-flow tube bundle array to the steam input tank of the air-cooled system, so that the array of tube bundles is airtightly connected to the steam input tank.

[0024] In the above implementation, the counter-flow air-cooled unit can be retrofitted with a connecting mechanism, and on this basis, the counter-flow air-cooled unit can be transformed into a parallel-flow air-cooled unit. In the case of significantly improving the reliability of the air-cooled unit, the distribution of the parallel-flow air-cooled units and the counter-flow air-cooled units in the air-cooled island can be adjusted, and the distribution of the air extraction and the steam of the air-cooled island is more uniform, thereby improving the cooling efficiency of the air-cooled island.

[0025] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The connection mechanism provided by the embodiments of the present application connects the components of the air cooling unit;

[0028] Figure 2 The connection mechanism provided by the embodiments of the present application is a partial enlarged view;

[0029] Figure 3 The connection mechanism provided by the embodiments of the present application is a connection schematic diagram of the air cooling unit;

[0030] Figure 4 The connection mechanism provided by the embodiments of the present application is a structural schematic diagram of the connection mechanism;

[0031] Figure 5 The air cooling unit provided by the embodiments of the present application is a structural schematic diagram of the air cooling unit;

[0032] Figure 6 The air cooling unit based on the connection mechanism provided by the embodiments of the present application is a flow schematic diagram of the retrofit method of the air cooling unit;

[0033] Figure 7 The electronic device provided by the embodiments of the present application is a structural schematic diagram of the electronic device.

[0034] Icon: A-air cooling unit; A1-air cooling tube bundle; A2-condensing box; A3-vapor input box; A4-connection mechanism; 1-tube plate; 10-through slot; 2-connection assembly; 20-connection piece; 210-flow-through channel; 220-compensation deformation part; 2210-corrugated deformation section; 230-connection piece main body; 7-electronic device; 701-processor; 702-memory; 703-communication bus. DETAILED DESCRIPTION

[0035] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0037] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0038] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0040] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] The direct air cooling system (ACC) is composed of multiple air cooling units of multiple rows and multiple columns according to the size of the unit capacity, each air cooling unit includes an air cooling tube bundle, and the steam discharged by the steam turbine is condensed by releasing heat to the atmosphere through the air cooling tube bundle; wherein the air cooling tube bundle can be a parallel flow tube bundle and a counter flow tube bundle, when the direct air cooling system is running, the steam discharged by the steam turbine is distributed to the parallel flow tube bundle through the steam distribution pipe, the steam flows from the upper part to the lower part of the parallel flow tube bundle, most of the steam is condensed in the tube bundle unit during this process, and the condensed water flows into the collecting pipe; in addition, a small part of the steam enters the counter flow tube bundle from the bottom collecting pipe and flows from bottom to top during the condensation process, and the condensed water flows back to the collecting pipe under the action of gravity, wherein the non-condensed gas is collected at the top of the counter flow tube bundle and discharged from the extraction port.

[0044] In the prior art, both the parallel flow tube bundle and the counter flow tube bundle will undergo the process of steam condensation; however, the temperature of the steam will change dramatically during the condensation process, especially when the machine is started and stopped in winter, at this time, the temperature change is the largest, when the temperature in the air cooling tube bundle changes dramatically, the air cooling tube bundle will expand or shrink, during the expansion or shrinkage of the air cooling tube bundle, the weld at the connecting position in the air cooling tube bundle will be pulled apart, and even the air cooling tube bundle and the steam distribution pipe will be broken, thereby causing steam leakage, affecting the operation efficiency of the overall system and wasting resources, and the problem of high maintenance cost.

[0045] Based on the above problems, the application designs a connecting mechanism, an air cooling unit and a retrofit method of the air cooling unit based on the connecting mechanism. The connecting mechanism is composed of a tube plate and a plurality of connecting pieces arranged on the tube plate. The first end of each connecting piece is fixedly connected with the tube plate, and the flow passage of each connecting piece corresponds to a through slot. The second end of each connecting piece is connected with an air cooling tube bundle. The expansion and contraction of the corresponding air cooling tube bundle can be compensated by the compensation deformation part arranged on each connecting piece, that is, when the air cooling tube bundle expands or contracts, the compensation deformation part of the connecting piece can compensate the expansion and contraction of the air cooling tube bundle, so that the air cooling tube bundle will not be squeezed or pulled at the connection position. At the same time, the connecting mechanism designed in the application is composed of a tube plate and a plurality of connecting pieces arranged on the tube plate. Therefore, the connecting mechanism does not need to repeatedly align each air cooling tube bundle during installation, but can be installed and welded at one time, thereby improving the installation efficiency of the connecting mechanism which can compensate the expansion and contraction of the air cooling tube bundle.

[0046] Based on the above idea, the application first provides a connecting mechanism, Figure 1 a separation view of the connecting mechanism connecting the components of the air cooling unit, Figure 2 a partial enlarged view of the connecting mechanism, Figure 3 a connection schematic view of the connecting mechanism and the air cooling unit; as Figures 1 to 3 shown, the connecting mechanism is used to connect the air cooling tube bundle A1 in the air cooling unit A. The air cooling unit A includes a condenser A2 and a plurality of spaced air cooling tube bundles A1. Specifically, the connecting mechanism designed in the application includes a tube plate 1 and a connecting assembly 2. The tube plate 1 is provided with a plurality of through slots 10 distributed at intervals. The connecting assembly 2 includes a plurality of connecting pieces 20. Each connecting piece 20 is provided with a flow passage 210 inside. The first end of each connecting piece 20 is fixedly connected with the tube plate 1, and the flow passage 210 of each connecting piece 20 corresponds to a through slot 10. The second end of each connecting piece 20 is used to connect with an air cooling tube bundle A1. The distance between adjacent connecting pieces 20 is consistent with the distance between the air cooling tube bundles A1. The tube plate 1 is used to connect with the condenser A2. As Figure 2 shown, the connecting mechanism designed in the application includes a compensation deformation part 220 on each connecting piece 20. The deformation direction of the compensation deformation part 220 is the same as the fluid flow direction in the air cooling tube bundle A1.

[0047] The air-cooled tube bundle A1 can be a parallel flow tube bundle or a counter flow tube bundle. In the case of a parallel flow tube bundle, the parallel flow tube bundle receives steam transmitted by the steam input box, and part of the steam condenses into water droplets in the parallel flow tube bundle. The remaining steam and the condensed water droplets are transmitted into the flow channel 210 of the corresponding connecting piece 20 through the flow space of the parallel flow tube bundle, and then flow into the condensing box A2 through the flow channel 210 of the connecting piece 20 and the through slot 10 of the tube plate 1 for secondary condensation. The residual steam in the condensing box A2 is finally transmitted to the outside air extraction pipeline through the counter flow tube bundle. In the case of a counter flow tube bundle, the residual steam in the condensing box A2 is transmitted to the flow space of the counter flow tube bundle through the through slot 10 of the tube plate 1 and the flow channel 210 of the corresponding connecting piece 20, and then condenses again in the counter flow tube bundle. The condensed water droplets flow back to the condensing box A2 through the flow space of the counter flow tube bundle, the flow channel 210 of the corresponding connecting piece 20, and the through slot 10 of the tube plate 1. The residual steam is finally transmitted to the outside air extraction pipeline through the flow space of the counter flow tube bundle.

[0048] The connecting mechanism designed above can compensate for the expansion or contraction of the air-cooled tube bundle A1 due to thermal expansion and contraction, especially in winter. In this case, the second end of each connecting piece 20 of the connecting mechanism is connected to an air-cooled tube bundle A1, and a compensation deformation part 220 is arranged on each connecting piece 20, which has the same deformation direction as the fluid flow direction in the air-cooled tube bundle A1. Therefore, when the air-cooled tube bundle A1 expands or contracts due to thermal expansion and contraction, the compensation deformation part 220 will elongate or contract accordingly to offset the expansion or contraction stress of the air-cooled tube bundle A1, thereby prolonging the service life of the air-cooled tube bundle A1.

[0049] In addition, since the number of the plurality of air cooling tube bundles A1 of the air cooling unit A is generally large, for example, 20 to 30 in a conventional case, the connecting mechanism designed by the present scheme is combined by the connecting assembly 2 formed by the tube plate 1 and the plurality of connecting pieces 20, therefore, the number of the connecting pieces 20 on the connecting mechanism can be matched according to the number of the air cooling tube bundles A1 in the air cooling unit A which is modified in actual situation, and the spacing between the adjacent connecting pieces 20 is the same as the spacing between the air cooling tube bundles, so that in the case of modifying the air cooling unit, the plurality of air cooling tube bundles A1 and the upper part of the condensing box A2 can be cut as a whole, then the tube plate 1 and the condensing box A2 cut by the rectangular gap in the connecting mechanism combined by the connecting assembly 2 and the tube plate 1 are aligned, that is, the scheme of aligning the plurality of connecting pieces 20 with the plurality of air cooling tube bundles A1 can be realized, without cutting, disassembling each air cooling tube bundle separately and adding the connecting pieces by aligning and welding one by one, that is, repeating 20 to 30 times of aligning and welding the same compensator, thereby greatly wasting the labor cost and the inefficient process, and thereby significantly improving the efficiency of installing the connecting mechanism.

[0050] In an optional embodiment of the present embodiment, as shown in Figure 4 each connecting piece 20 designed by the present scheme further includes a connecting piece body 230, the compensation deformation part 220 is arranged on the connecting piece body 230, the first end of the connecting piece body 230 is fixedly connected with the tube plate 1, the second end of the connecting piece body 230 is used for fixedly connecting with the air cooling tube bundle A1, and the flow-through channel 210 penetrates through the first end and the second end.

[0051] Specifically, the compensation deformation part 220 designed in the scheme includes a corrugated deformation section 2210, the corrugated deformation section 2210 includes a flow passage formed in a curved structure inside, the flow passage of the corrugated deformation section 2210 is in communication with the flow passage of the connector body 230, the extension direction of the corrugated deformation of the corrugated deformation section 2210 is the same as the fluid flow direction in the air-cooled tube bundle A1; the corrugated deformation section 2210 designed in the scheme is integrally formed with the connector body 230, the corrugated deformation section 2210 is a concave-convex structure bent relative to the side wall of the connector body 230, when the air-cooled tube bundle A1 expands, at this time the corrugated deformation section 2210 will be elongated in the extension direction to both sides under the action of the expansion force, thereby offsetting the internal expansion stress of the air-cooled tube bundle A1, when the air-cooled tube bundle A1 shrinks, at this time the corrugated deformation section 2210 will be contracted to the center position under the action of the expansion force, thereby offsetting the internal contraction stress of the air-cooled tube bundle A1. Wherein, the number of corrugations (concave-convex structures) in the corrugated deformation section 2210 designed in the scheme is any integer from two to five, for example, the number of corrugated deformation sections 2210 can be 2 or 3 or 4 or 5. Preferably, the number of corrugated deformation sections 2210 designed in the scheme can be three, and three corrugations can more effectively compensate for the expansion and contraction of the air-cooled tube bundle A1.

[0052] In the optional implementation of the embodiment, the shape of the connector body 230 designed in the scheme matches the shape of the air-cooled tube bundle A1, for example, the air-cooled tube bundle A1 is generally in a rectangular structure shape, and for this, the cross section of the connector body 230 designed in the scheme is also in a rectangular shape, wherein the cross section represents the cross section perpendicular to the fluid flow direction in the air-cooled tube bundle A1.

[0053] In the above design, the area of the cross section of the second end of the connector body 230 designed in the scheme is greater than the area of the cross section of the air-cooled tube bundle A1, so that the air-cooled tube bundle A1 is embedded in the second end of the connector body 230, and then the part in contact between the air-cooled tube bundle A1 and the second end of the connector body 230 is welded, thereby realizing the sealed connection between the air-cooled tube bundle A1 and the connector 20.

[0054] Wherein, the length of the air-cooled tube bundle A1 embedded in the second end of the connector body 230 can be in the range of 1mm to 30mm, specifically, the length of the air-cooled tube bundle A1 embedded in the second end of the connector body 230 can be any one of 1mm, 3mm, 5mm, 8mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 28mm, 29mm and 30mm; preferably, the length of the air-cooled tube bundle A1 embedded in the second end of the connector body 230 is any one of 3mm, 4mm and 5mm.

[0055] In the above embodiment, the second end of the connecting member body 230 is designed to have a cross-sectional area slightly larger than that of the air-cooled tube bundle A1, so that the lower part of the air-cooled tube bundle A1 can be inserted into the connecting member body 230 and then welded, avoiding butt welding, so as to realize the argon arc welding of the fillet weld without argon filling, reduce the difficulty of welding, and improve the efficiency of welding.

[0056] The application also provides an air-cooled unit, as shown in the drawings, which comprises a plurality of air-cooled tube bundles A1 arranged at intervals, a condensing tank A2, a steam input tank A3, and the connecting mechanism A4 described in any of the optional embodiments above, wherein the first end of each air-cooled tube bundle A1 is connected with the steam input tank A3, and the second end of each air-cooled tube bundle A1 is connected with the condensing tank A2 through one connecting member 20 of the connecting mechanism A4 and the tube plate 1. Figure 5 The air-cooled unit designed above, due to the connecting mechanism described above, the air-cooled unit with the connecting mechanism can compensate for the deformation of the connecting mechanism so that the air-cooled tube bundle in the air-cooled unit will not expand or shrink, or even crack, due to temperature changes, thereby significantly improving the reliability of the air-cooled unit.

[0057] It should be noted that the air-cooled unit designed above is a forward-flow air-cooled unit, that is, the air-cooled tube bundle is arranged between the steam input tank A3 and the condensing tank A2. Of course, the present application can also be designed as a reverse-flow air-cooled unit. In the case of a reverse-flow air-cooled unit, the first end of each air-cooled tube bundle A1 is connected with the steam input tank A3, and the second end of each air-cooled tube bundle A1 is connected with the condensing tank A2 through one connecting member 20 of the connecting mechanism A4 and the tube plate 1, thereby forming a reverse-flow air-cooled unit.

[0058] The application also provides a retrofit method for an air-cooled unit based on a connecting mechanism. The retrofit method can be applied to retrofit the connecting mechanism of an air-cooled unit that has already been set up, including but not limited to the forward-flow air-cooled unit and the reverse-flow air-cooled unit described above, so that the air-cooled unit with the connecting mechanism can compensate for the deformation of the connecting mechanism so that the air-cooled tube bundle will not expand or shrink, or even crack, due to temperature changes, thereby significantly improving the reliability of the air-cooled unit.

[0059] Specifically, the retrofit method for an air-cooled unit based on a connecting mechanism can be realized by the method as shown in the drawings, which comprises the following steps:

[0060] Figure 6 Step S600: At a predetermined distance from the condensing tank, all air-cooled tube bundles of the air-cooled tube bundle array are cut flush, and a predetermined area of the upper end face of the condensing tank is cut, to obtain a cutting body.

[0061] Step S600: At a predetermined distance from the condensing tank, all air-cooled tube bundles of the air-cooled tube bundle array are cut flush, and a predetermined area of the upper end face of the condensing tank is cut, to obtain a cutting body. ​

[0062] Step S610: removing the cutting body.

[0063] Step S620: setting the tube plate of the connecting mechanism in the preset area on the condensing box and setting the plurality of connecting pieces towards the direction of the cut air-cooled tube bundles.

[0064] Step S630: welding the tube plate with the cutting part on the condensing box and welding the plurality of connecting pieces with the cut air-cooled tube bundles.

[0065] In the above embodiment, the air-cooled unit before modification, the array of air-cooled tube bundles is directly connected with the condensing box, in order to install the connecting mechanism, the present scheme first cuts all the air-cooled tube bundles of the array of air-cooled tube bundles in a flush manner at a preset distance from the connecting part of the array of air-cooled tube bundles and the condensing box, and cuts the preset area of the upper end surface of the condensing box to obtain a cutting body. The preset distance can be less than or equal to the vertical height of the connecting pieces on the connecting mechanism, the vertical height of the connecting pieces represents the distance between the top of the connecting pieces and the tube plate of the connecting mechanism, and the preset area of the upper end surface of the condensing box can match the size of the tube plate of the connecting mechanism.

[0066] After cutting all the air-cooled tube bundles of the array of air-cooled tube bundles in a flush manner and cutting the preset area of the upper end surface of the condensing box, the present scheme can remove the cutting body obtained by cutting, so that an installation space is formed between the air-cooled tube bundles and the condensing box.

[0067] After removing the cutting body, the present scheme can set the tube plate of the connecting mechanism in the preset area on the condensing box and set the plurality of connecting pieces towards the direction of the cut air-cooled tube bundles.

[0068] Since the preset area on the condensing box matches the tube plate, and the distance between the plurality of connecting pieces on the connecting mechanism is the same as the distance between the air-cooled tube bundles, the plurality of connecting pieces on the connecting mechanism are fixedly connected with the tube plate, so that the positions of the plurality of connecting pieces on the connecting mechanism relative to the tube plate are fixed, the distance between the plurality of connecting pieces is the same as the distance between the air-cooled tube bundles, and in the case that the tube plate is set in the preset area on the condensing box and the tube plate is aligned with the preset area, the plurality of connecting pieces on the connecting mechanism are also aligned with the plurality of cut air-cooled tube bundles one by one, so that the present scheme does not need to cut, disassemble and add connecting pieces one by one for each air-cooled tube bundle, thereby further improving the efficiency of installing the connecting mechanism and saving labor costs under the condition that the reliability of the air-cooled unit is significantly improved by modifying and adding the connecting mechanism to prevent the air-cooled tube bundles from expanding or shrinking or even cracking due to temperature changes.

[0069] By the above manner, the alignment of the tube plate and the preset area is realized, and the multiple connecting pieces on the connecting mechanism are automatically aligned with the multiple air-cooled tube bundles after cutting. The tube plate and the cutting part on the condensing box are welded, and the multiple connecting pieces and the cut air-cooled tube bundles are welded, so that the connecting mechanism is added to the air-cooled unit for modification.

[0070] The modification method of the air-cooled unit based on the connecting mechanism is designed as follows. First, all the air-cooled tube bundles of the air-cooled tube bundle array are cut in a flush manner at a preset distance from the connecting part of the air-cooled tube bundle array and the condensing box, and a preset area of the upper end face of the condensing box is cut to obtain a cutting main body. Specifically, assuming that the tube plate is a rectangular plate structure as shown in the figure, in this case, the preset area on the condensing box cut by the present application is also a rectangular area, and the depth of the preset area is equivalent to the thickness of the tube plate. In this way, the tube plate is placed in the preset area, and the tube plate can be perfectly combined with the cut condensing box. Figures 1 to 5

[0071] Specifically, in the case of cutting the air-cooled tube bundle, in order to realize flush cutting, the present application can use a flush clamping device to clamp multiple air-cooled tube bundles in a flush manner, and then use a cutting device to cut the air-cooled tube bundles clamped in a flush manner. As a possible implementation, the flush clamping device designed by the present application can use a comb-shaped flush ruler to clamp in a flush manner. The comb-shaped flush ruler has a horizontal comb handle and multiple comb teeth arranged on the comb handle. The comb-shaped flush ruler can be inserted into multiple air-cooled tube bundles, and each air-cooled tube bundle is located in the gap between two comb teeth of the comb-shaped flush ruler. Then, the comb-shaped flush ruler is lifted so that the air-cooled tube bundle at the lower end of the comb-shaped flush ruler is at a preset distance from the connecting part of the condensing box. In this way, by maintaining the comb-shaped flush ruler in a horizontal state, the multiple air-cooled tube bundles located between the comb teeth can be flush and maintain a preset distance from the connecting part of the condensing box. Then, the air-cooled tube bundle at the lower end of the comb-shaped flush ruler is cut in a flush manner by the cutting device, so that all the air-cooled tube bundles of the air-cooled tube bundle array are cut in a flush manner.

[0072] The comb-shaped flush ruler can also have a fixing member, which is a horizontal rod with multiple insertion slots matched with the comb teeth. In the case that the air-cooled tube bundle is located in the gap between the two comb teeth of the comb-shaped flush ruler and the comb-shaped flush ruler is maintained in a horizontal state, the comb teeth can be inserted into the insertion slots of the horizontal rod in sequence. The horizontal rod is opposite to the comb handle, and the air-cooled tube bundle is located between the comb handle and the horizontal rod, so that the comb-shaped flush ruler is fixed, and the worker does not need to maintain the comb-shaped flush ruler in a flush manner during cutting.

[0073] ​After the above-mentioned manner realizes the flush cutting of the air-cooled tube bundle and the preset area of the condensing box, the worker can remove the cutting body. After the cutting body is removed, the tube plate of the connecting mechanism is arranged in the preset area on the condensing box. Since the shape of the preset area is equivalent to the tube plate, and the depth of the preset area is equivalent to the thickness of the tube plate, the tube plate is placed in the preset area, and the tube plate can be perfectly combined with the cut condensing box. Then, the plurality of connecting pieces are arranged towards the direction of the cut air-cooled tube bundle. Since the preset area on the condensing box matches the tube plate, and the spacing between the plurality of connecting pieces on the connecting mechanism is the same as the spacing between the air-cooled tube bundles, the plurality of connecting pieces on the connecting mechanism are fixedly connected with the tube plate. Since the positions of the plurality of connecting pieces of the connecting mechanism relative to the tube plate are fixed, the spacing between the plurality of connecting pieces is the same as the spacing between the air-cooled tube bundles. In the case that the tube plate is arranged in the preset area on the condensing box and the tube plate is aligned with the preset area, the plurality of connecting pieces on the connecting mechanism are also aligned with the plurality of cut air-cooled tube bundles one by one. Therefore, the present scheme does not need to cut, disassemble and add connecting pieces one by one for each air-cooled tube bundle, and further improves the efficiency of the installation of the connecting mechanism and saves labor costs under the condition that the air-cooled unit is modified to increase the connecting mechanism to prevent the air-cooled tube bundle from expanding or shrinking due to temperature changes or even cracking, and significantly improves the reliability of the air-cooled unit.

[0074] In an optional embodiment of the present embodiment, the distance between the edge of the preset area and the closest air-cooled tube bundle is equal to the distance between the edge of the tube plate and the closest connecting piece, that is, the shape and size of the tube plate are the same as those of the cut preset area on the condensing tube. Therefore, the tube plate can be more suitable for the cut condensing tube.

[0075] In an optional embodiment of the present embodiment, as described above, the preset distance can be less than or equal to the vertical height of the connecting piece on the connecting mechanism. As a possible embodiment, in the case that the preset distance is equal to the vertical height of the connecting piece on the connecting mechanism, the cut air-cooled tube bundle is just fitted with the connecting piece on the connecting mechanism. Therefore, the fitted air-cooled tube bundle and the connecting piece can be welded to realize sealed connection.

[0076] As another possible implementation, the preset distance of the present scheme can be less than the vertical height of the connecting member on the connecting mechanism, and the cross-sectional area of the connecting member is designed to be greater than the cross-sectional area of the air-cooled tube bundle, wherein the cross-section represents the cross-section perpendicular to the fluid flow direction in the air-cooled tube bundle. In the case of welding the plurality of connecting members with the cut air-cooled tube bundle, the present scheme can insert the cutting part of each air-cooled tube bundle in the air-cooled tube bundle array into the corresponding connecting member, and then weld the interface between each air-cooled tube bundle and the connecting member. This avoids butt welding of the air-cooled tube bundle and the connecting member, and further realizes fillet welding of the air-cooled tube bundle and the connecting member, thereby reducing the difficulty of welding and improving the efficiency of welding.

[0077] In an optional embodiment of the present embodiment, the insertion length of the cutting part of the air-cooled tube bundle into the corresponding connecting member can be in the range of 1mm to 30mm. Specifically, the insertion length of the cutting part of the air-cooled tube bundle into the corresponding connecting member can be any one of 1mm, 3mm, 5mm, 8mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 28mm, 29mm and 30mm. Preferably, the insertion length of the cutting part of the air-cooled tube bundle into the corresponding connecting member is any one of 3mm, 4mm and 5mm.

[0078] In an optional embodiment of the present embodiment, the retrofit method described above can be applied to both the parallel flow air-cooled unit and the counterflow air-cooled unit. In the case of air-cooled tube bundles in the air-cooled unit being all parallel flow air-cooled tube bundles, the present scheme maintains the sealed connection between each parallel flow tube bundle in the parallel flow tube bundle array and the steam input tank, and then performs the above steps S600 to S630 on the other end of the parallel flow tube bundle array connected to the condensing tank, thereby realizing the retrofit of the parallel flow air-cooled unit (the air-cooled unit with all parallel flow air-cooled tube bundles).

[0079] In the case that all the air cooling tube bundles in the air cooling unit are counter-flow air cooling tube bundles, in order to make the distribution of the steam and the extraction gas in the pipeline of the entire air cooling island more uniform, the present scheme not only needs to modify the connecting mechanism of the counter-flow air cooling unit, but also needs to transform the counter-flow air cooling unit (the air cooling unit in which all the air cooling tube bundles are counter-flow air cooling tube bundles) into a parallel-flow air cooling unit. To this end, the present scheme can modify the connecting mechanism of the counter-flow air cooling unit and transform the counter-flow air cooling unit into a parallel-flow air cooling unit in the following manner. Specifically, since the counter-flow air cooling tube bundles of the counter-flow air cooling unit are arranged between the condensing box and the steam output box (extraction gas box), the present scheme can first cut all the counter-flow tube bundles of the counter-flow tube bundle array in a flush manner at a second preset distance from the connection between the counter-flow tube bundle array and the steam output box (extraction gas box), then lift the entire counter-flow tube bundle array by the second preset distance, and connect the cut part of the counter-flow tube bundle array with the steam input box of the air cooling system, so that the tube bundle array is in airtight connection with the steam input box, thereby transforming the counter-flow tube bundle array into a parallel-flow tube bundle array.

[0080] After transforming the counter-flow tube bundle array into a parallel-flow tube bundle array, the modified tube bundle array can be modified according to steps S600 to S630 of the aforementioned modification method, thereby realizing the modification of the air cooling unit to add a connecting mechanism, and further realizing the modification of the connecting mechanism of the counter-flow air cooling unit and the transformation of the counter-flow air cooling unit into a parallel-flow air cooling unit.

[0081] The above embodiment can not only modify the connecting mechanism of the counter-flow air cooling unit, but also transform the counter-flow air cooling unit into a parallel-flow air cooling unit on this basis. In the case of significantly improving the reliability of the air cooling unit, the distribution of the parallel-flow air cooling unit and the counter-flow air cooling unit in the air cooling island can also be adjusted, thereby making the distribution of the extraction gas and the steam of the air cooling island more uniform, and thereby improving the cooling efficiency of the air cooling island.

[0082] According to some embodiments of the present application, as Figure 7As shown, the present application provides an electronic device 7, comprising: a processor 701 and a memory 702, the processor 701 and the memory 702 are interconnected and communicate with each other through a communication bus 703 and / or other forms of connection mechanism (not shown), the memory 702 stores a computer program executable by the processor 701, when the computing device is running, the processor 701 executes the computer program to execute the method of any optional implementation manner, for example, steps S600 to S630: all air-cooled tubes of the air-cooled tube bundle array are cut flush at a preset distance from the connection of the air-cooled tube bundle array and the condenser box, and a preset area of the upper end surface of the condenser box is cut to obtain a cutting body; the cutting body is removed; the tube plate of the connection mechanism is arranged in the preset area, and a plurality of connecting pieces are arranged towards the direction of the cut air-cooled tube bundle; the tube plate is welded with the cutting part on the condenser box, and the plurality of connecting pieces are welded with the cut air-cooled tube bundle.

[0083] The present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by a processor to execute the method in any optional implementation manner.

[0084] The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0085] The present application provides a computer program product, which, when running on a computer, causes the computer to execute the method in any optional implementation manner.

[0086] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connection mechanism, characterized in that The application relates to a connecting mechanism for connecting air cooling tube bundles in an air cooling unit, wherein the air cooling unit comprises a condensing box and a plurality of air cooling tube bundles arranged at intervals. The connecting mechanism comprises a tube plate and a connecting assembly. A plurality of through grooves are arranged at intervals on the tube plate. The connecting assembly comprises a plurality of connecting pieces, each of which is internally provided with a flow channel, the first end of each connecting piece is fixedly connected with the tube plate, and the flow channel of each connecting piece corresponds to a through groove; the second end of each connecting piece is used for being connected with an air cooling tube bundle, the spacing between adjacent connecting pieces is consistent with the spacing between air cooling tube bundles, and the tube plate is used for being connected with the condensing box. The connecting piece comprises a deformation compensation part, and the deformation direction of the deformation compensation part is the same as the fluid flow direction in the air cooling tube bundle.

2. The connection mechanism of claim 1, wherein The connecting piece further comprises a connecting piece main body. The deformation compensation part is arranged on the connecting piece main body, the first end of the connecting piece main body is fixedly connected with the tube plate, the second end of the connecting piece main body is used for being fixedly connected with the air cooling tube bundle, and the flow channel penetrates through the first end and the second end.

3. The connection mechanism of claim 2, wherein The area of the cross section of the second end of the connecting piece main body is larger than the area of the cross section of the air cooling tube bundle. The air cooling tube bundle is embedded in the second end of the connecting piece main body, and the cross section is a cross section perpendicular to the fluid flow direction in the air cooling tube bundle. The deformation compensation part comprises a corrugated deformation section.

4. The connection mechanism of claim 2, wherein The corrugated deformation section comprises a flow channel formed in a curved structure. The flow channel of the corrugated deformation section is in communication with the flow channel of the connecting piece main body, and the corrugated deformation extension direction of the corrugated deformation section is the same as the fluid flow direction in the air cooling tube bundle. The number of corrugations in the corrugated deformation section is any integer from 2 to 5.

5. The connection mechanism of claim 4, wherein, The air cooling unit comprises a plurality of air cooling tube bundles arranged at intervals, a condensing box, a steam input box and the connecting mechanism in any one of claims 1-5.

6. An air-cooled unit characterized by, The first end of each air cooling tube bundle is connected with the steam input box, and the second end of each air cooling tube bundle is connected with the condensing box through one connecting piece of the connecting mechanism and the tube plate. The air cooling unit comprises a tube bundle array, a condensing box and a steam input box, and the connecting mechanism is the connecting mechanism in any one of claims 1-5, wherein the spacing between adjacent connecting pieces in the connecting mechanism is consistent with the spacing between tube bundles in the tube bundle array.

7. A retrofit method of a connection mechanism based air cooling unit, characterized by, The method comprises the following steps: The air cooling tube bundles in the air cooling tube bundle array are cut to be flush at a preset distance from the connection position with the condensing box, and a preset area of the upper end face of the condensing box is cut, so as to obtain a cutting body; the area of the preset area is matched with the area of the tube plate of the connecting mechanism; The cutting body is removed; The tube plate of the connecting mechanism is arranged in the preset area, and the connecting pieces are arranged towards the cut air cooling tube bundles; The tube plate is welded with the cutting part on the condensing box; The connecting pieces are welded with the cut air cooling tube bundles. ​ 8. The method of claim 7, wherein, ​ The distance between the edge of the preset area and the closest air-cooled tube bundle is equal to the distance between the edge of the tube plate and the closest connecting piece.

9. The method of claim 7, wherein, Wherein, The cross-sectional area of the connecting piece is larger than the cross-sectional area of the air-cooled tube bundle, wherein the cross-section represents the cross-section perpendicular to the fluid flow direction in the air-cooled tube bundle; The welding of the aligned air-cooled tube bundle array and the connecting piece comprises: Inserting the cutting part of each air-cooled tube bundle in the air-cooled tube bundle array into the corresponding connecting piece, and welding the interface between each air-cooled tube bundle and the connecting piece.

10. The method of claim 9, wherein, Wherein, The insertion length of the cutting part of the air-cooled tube bundle into the corresponding connecting piece ranges from 1mm to 30mm.

11. The method of claim 7, wherein, The tube bundle array comprises a co-current tube bundle array arranged between the steam input tank and the condensation tank; The method further comprises: Maintaining the airtight connection between each co-current tube bundle in the co-current tube bundle array and the steam input tank.

12. The method of claim 7, wherein, The tube bundle array comprises a counter-current tube bundle array arranged between the condensation tank and the steam output tank; the method further comprises: Flattening cutting all counter-current tube bundles in the counter-current tube bundle array at a second preset distance from the connecting piece of the counter-current tube bundle array and the steam output tank; Lifting the counter-current tube bundle array by the second preset distance, and connecting the cutting part of the counter-current tube bundle array with the steam input tank of the air-cooled system, so that the tube bundle array is airtightly connected with the steam input tank.

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