Modular prefabricated instrument stand for thermal power plant

Abstract

The utility model relates to the technical field of thermal power plants, and provides a modular prefabricated instrument stand for a thermal power plant. Comprising an instrument installation module which comprises a first outer frame formed by eyelet channel steel and instrument installation channel steel adjustably fixed in the first outer frame, and the instrument installation channel steel is used for fixing an instrument assembly; the blow-down valve and blow-down pipe module comprises a second outer frame formed by eyelet channel steel and a channel steel cross rod adjustably fixed in the second outer frame, and the channel steel cross rod is used for fixing a blow-down assembly; the junction box and cable junction module comprises a junction box and a cable trough box; the junction box is fixed at the top of the instrument mounting module and / or the blow-down valve and blow-down pipe module; the modules are longitudinally or transversely spliced through connecting flanges and bolts. And by adopting the modular design, different instruments can be adapted only through a small amount of adaptive adjustment on site, and the workload of on-site installation is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of thermal power plant technology, specifically to a modular prefabricated instrument rack for thermal power plants. Background Technology

[0002] Differential pressure measuring instruments are centrally located in instrument racks or boxes. These racks are typically fabricated on-site by the construction company, requiring significant on-site labor and materials. Furthermore, different construction companies use different fabrication methods and materials, and the skill levels of on-site welders vary considerably, resulting in poor consistency in the structure and appearance of the instrument racks. This leads to aesthetic issues, inconvenience in maintenance and repair, and limited potential for future expansion. In addition, the installation of different types of instruments on the racks, such as pressure transmitters / pressure switches / pressure gauges and differential pressure transmitters / differential pressure switches, results in inconsistent installation methods and accessory configurations. Some measuring pipelines require drain valves (and high-pressure pipelines require double drain valves), while others do not; some use single valves, while others use valve assemblies. Therefore, the structural design of the instrument rack must adapt to different instrument installation accessories and installation schemes, making it objectively difficult to use a single structural design suitable for all instrument installations.

[0003] In overseas projects or projects with tight construction schedules, due to limited on-site human resources, tight deadlines, and long material procurement cycles, it is objectively necessary to reduce on-site installation work and adopt prefabricated and modular instrument racks as much as possible. Summary of the Invention

[0004] In view of this, this application provides a modular prefabricated instrument rack for thermal power plants to solve the problem of the workload of instrument rack installation in thermal power plants.

[0005] This application provides a modular prefabricated instrument rack for a thermal power plant, including at least one of an instrument installation module and a drain valve and drain pipe module, as well as a junction box and cable connection module. The instrument installation module, the drain valve and drain pipe module, and the junction box and cable connection module are independent of each other and can be spliced ​​and combined.

[0006] The instrument mounting module includes a first outer frame made of perforated channel steel and an instrument mounting channel steel that is adjustablely fixed inside the first outer frame. The instrument mounting channel steel is used to fix the instrument components.

[0007] The drain valve and drain pipe module includes a second outer frame made of perforated channel steel and a channel steel crossbar that is adjustablely fixed inside the second outer frame. The channel steel crossbar is used to fix the drain assembly.

[0008] The junction box and cable connection module includes a junction box and a cable tray, and the junction box is fixed to the top of the instrument installation module and / or the drain valve and drain pipe module;

[0009] The instrument installation module, the drain valve and the drain pipe module are all equipped with connecting flanges at their upper and lower ends, and the modules are spliced ​​together longitudinally or laterally through the connecting flanges and bolts.

[0010] In one embodiment, the modules spliced ​​longitudinally or laterally share a common junction box and cable wiring module, and the extension direction of the cable tray is consistent with the splicing direction.

[0011] In one embodiment, the instrument assembly is fixed to the instrument mounting channel steel via an instrument mounting bracket, the instrument assemblies are connected to each other via an instrument tube, and the instrument tube is fixed to the instrument mounting channel steel 12 via an instrument tube clamp.

[0012] In one embodiment, the instrumentation assembly includes at least one of a pressure gauge, a secondary valve, a differential pressure gauge, and a three-valve manifold, wherein the pressure gauge is any one of a pressure transmitter, a pressure switch, or a pressure meter, and the differential pressure gauge is a differential pressure transmitter or a differential pressure switch.

[0013] In one embodiment, the sewage discharge assembly includes a sewage discharge valve and a sewage discharge pipe. One end of the sewage discharge valve is connected to the instrument assembly through an instrument pipe, and the other end is connected to the sewage discharge pipe through an instrument pipe. The instrument pipe is fixed to the channel steel crossbar by an instrument pipe clamp.

[0014] In one embodiment, the drain pipes of the plurality of drain valves and drain pipe modules are connected by flanges.

[0015] In one embodiment, the junction box and cable wiring module, the instrument installation module, and the drain valve and drain pipe module are longitudinally connected in sequence through the connecting flange to form a single-layer instrument rack structure with a drain.

[0016] In one embodiment, a junction box and cable wiring module are longitudinally connected to multiple instrument mounting modules in sequence via the connecting flanges to form a multi-layer, non-drainage instrument rack structure.

[0017] In one embodiment, the lateral splicing includes sequential splicing along the length of the instrument rack and / or back-to-back splicing along the width of the instrument rack.

[0018] This application's embodiment of the modular prefabricated instrument rack for thermal power plants utilizes a modular design, decomposing a conventional thermal power plant instrument rack into three functional modules: an instrument installation module, a drain valve and drain pipe module, and a junction box and cable connection module. Each module is designed according to standardized principles, ensuring uniform materials, dimensions, and interfaces. On-site, it can be freely combined and expanded according to actual installation needs, requiring only bolt connections. The instrument installation module, drain valve, and drain pipe module are designed to accommodate various instrument installation methods, requiring only minor adjustments on-site to adapt to different instruments, significantly reducing on-site installation workload. Furthermore, the standardized design of each module allows for large-scale factory manufacturing, reducing costs. Modular installation also facilitates maintenance, repair, and expansion, reducing the types and quantities of spare parts. Additionally, its aesthetically pleasing and uniform appearance is highly user-friendly for daily operation and maintenance by the owner, and it facilitates future expansion as needed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an instrument mounting module provided in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a drain valve and drain pipe module provided in an embodiment of this application;

[0022] Figure 3 yes Figure 2 A schematic diagram of direction AA;

[0023] Figure 4 This is a schematic diagram of the junction box and cable connection module provided in one embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a double-layer, non-drainage instrument rack structure provided in an embodiment of this application;

[0025] Figure 6 This application provides a single-layer instrument rack structure with sewage discharge in one embodiment;

[0026] Figure 7 yes Figure 6 A schematic diagram of the BB direction;

[0027] Figure 8This is a schematic diagram of an instrument frame spliced ​​along the length direction of the instrument frame according to an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of an instrument frame spliced ​​back-to-back along the width direction of the instrument frame according to an embodiment of this application;

[0029] In the diagram, 1-Instrument mounting module, 11-First outer frame, 12-Instrument mounting channel steel, 13-Instrument pipe clamp, 14-Pressure instrument, 15-Differential pressure instrument, 16-Secondary valve, 17-Three-valve manifold, 18-Equal diameter three-way valve, 19-Instrument mounting bracket, 2-Drain valve and drain pipe module, 21-Second outer frame, 22-Channel steel crossbar, 23-Drain valve, 24-Drain pipe, 3-Junction box and cable connection module, 31-Junction box, 32-Cable trough box, 4-Connecting flange, 5-Instrument pipe. Detailed Implementation

[0030] 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 this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0031] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0034] The modular prefabricated instrument rack for thermal power plants provided in this application embodiment includes a modular prefabricated instrument rack for thermal power plants, including at least one of an instrument installation module 1 and a sewage valve and sewage pipe module 2, as well as a junction box and cable connection module 3. The instrument installation module 1, the sewage valve and sewage pipe module 2 and the junction box and cable connection module 3 are independent of each other and can be spliced ​​and combined.

[0035] like Figure 1 As shown, the instrument mounting module 1 includes a first outer frame 11 made of perforated channel steel and an instrument mounting channel steel 12 that is adjustablely fixed inside the first outer frame 11. The instrument mounting channel steel 12 is used to fix the instrument components.

[0036] like Figure 2 , 3 As shown, the drain valve and drain pipe module 2 includes a second outer frame 21 made of perforated channel steel and a channel steel crossbar 22 that is adjustablely fixed inside the second outer frame 21. The channel steel crossbar 22 is used to fix the drain assembly.

[0037] like Figure 4 As shown, the junction box and cable connection module 3 includes a junction box 31 and a cable tray 32. The junction box 31 is fixed to the top of the instrument installation module 1 and / or the drain valve and drain pipe module 2.

[0038] Among them, the upper and lower ends of the instrument installation module 1 and the drain valve and drain pipe module 2 are equipped with connecting flanges 4, and the modules are spliced ​​longitudinally or laterally by connecting flanges 4 and bolts.

[0039] In application, the conventional instrument rack is divided into three standard functional modules: instrument installation module 1, drain valve and drain pipe module 2, and junction box and cable connection module 3. Instrument installation module 1 and drain valve and drain pipe module 2 are identical in size and connection interface. Both modules are constructed from No. 8 perforated channel steel, welded or bolted together, requiring no other types of steel and facilitating mass production.

[0040] In application, the junction box and cable connection module 3 is arranged above the instrument mounting module 1, and consists of a junction box 31 and a cable tray 32. The junction box 31 and the cable tray 32 are connected to the perforated channel steel on the top of the instrument mounting module 1 by bolts. When multiple instrument racks are installed in parallel, only the cable tray 32 needs to be extended. The added cable tray 32 is connected to the original cable tray 32 in the module by direct cable tray plates and bolts.

[0041] In application, the instrument mounting module 1 consists of a first outer frame 11, an instrument mounting channel steel 12, an instrument pipe fixing channel steel, connecting flanges 4, and bolts. The first outer frame 11 is welded from #8 perforated channel steel, and the instrument mounting channel steel 12 and the instrument pipe fixing channel steel are both made of the same #8 perforated channel steel as the first outer frame 11. Pressure gauges 14 and differential pressure gauges 15 are fixed to the instrument mounting channel steel 12 via instrument mounting brackets 19. Instrument pipes 5 and secondary valves 16 are fixed to the instrument pipe fixing channel steel (i.e., the crossbar below the instrument mounting channel steel 12) via instrument pipe clamps 13. The crossbar is connected to the outer frame via connectors and bolts, and can be adjusted up and down according to the instrument valves and pipelines. The instrument mounting module 1 has connecting flanges 4 at the top and bottom. It can be fixed to the ground independently, or connected to other instrument mounting modules 1 or drain valve and drain pipe mounting modules 2 via flanges, or expanded laterally via bolt connections.

[0042] In application, the drain valve and drain pipe installation module 2 consists of a second outer frame 21, channel steel crossbars 22 (made of perforated channel steel), a drain valve 23, a drain pipe 24, connecting flanges 4, and bolts. The drain valve 23 and instrument pipe 5 are fixed to the perforated channel steel crossbars at the top and middle of the frame via instrument pipe clamps 13. The crossbars are connected to the outer frame via connectors and bolts, and can be adjusted vertically according to the instrument valve and pipeline configuration. The drain valve and drain pipe installation module 2 has connecting flanges at the top and bottom. The lower part can be fixed to the ground, and the upper part is connected to the instrument installation module via flanges and bolts to form an instrument rack with a drain. It can also be expanded horizontally via bolt connections. When space is limited and horizontal expansion is not possible, it can also be installed back-to-back to save installation space and centrally arrange pipelines and cables.

[0043] This application adopts a modular design. The instrument mounting module and the drain valve and drain pipe module have completely identical external dimensions, and the outer frame material and lateral fixing material are also completely identical, all being No. 8 perforated channel steel. This facilitates mass production in the factory, reduces costs, and also facilitates transportation, installation, and maintenance. The rationally designed instrument mounting module and drain valve and drain pipe module, through the combination of the two modules, are suitable for the installation of various types of instruments. When installing pressure / differential pressure instruments for media such as air, flue gas, oil, and vacuum, since a drain valve and drain system are not required, the instrument mounting module can be used alone, or the instrument mounting modules can be stacked vertically for compact arrangement. When used for pressure / differential pressure measurement of media such as steam and water, the instrument mounting module and drain valve and drain pipe module are combined vertically to meet the instrument installation requirements. The instrument module and drain valve and drain pipe module are provided with lateral connection interfaces for easy expansion. When additional instruments need to be installed on-site, this can be achieved through lateral expansion bolts, and the external structure is completely consistent with the existing instrument rack. The drain pipe is expanded through standard flange connections, eliminating the need to replace the original drain pipe.

[0044] In one embodiment, the modules spliced ​​longitudinally or laterally share a junction box and cable wiring module 3, and the extension direction of the cable tray 32 is consistent with the splicing direction.

[0045] In one embodiment, the instrument components are fixed to the instrument mounting channel steel 12 by the instrument mounting bracket, and the instrument components are connected by the instrument tube, which is fixed to the instrument mounting channel steel 12 by the instrument tube clamp 13.

[0046] In one embodiment, the instrumentation assembly includes at least one of a pressure gauge 14, a secondary valve 16, a differential pressure gauge 15, and a three-valve manifold 17, wherein the pressure gauge is any one of a pressure transmitter, a pressure switch, or a pressure gauge, and the differential pressure gauge is a differential pressure transmitter or a differential pressure switch.

[0047] In one embodiment, the sewage discharge assembly includes a sewage discharge valve 23 and a sewage discharge pipe 24. One end of the sewage discharge valve 23 is connected to the instrument assembly through an instrument pipe, and the other end is connected to the sewage discharge pipe 24 through an instrument pipe. The instrument pipe is fixed to the channel steel crossbar 22 through an instrument pipe clamp 13.

[0048] In one embodiment, the drain pipes 24 of the multiple drain valves and drain pipe modules 2 are connected by flanges.

[0049] In one embodiment, such as Figure 5 As shown, when applied to instrument installations that do not require a drain valve, the instrument mounting module 1 can be stacked vertically and connected only by bolts. The junction box and cable wiring module 3, the instrument mounting module 1, and the drain valve and drain pipe module 2 are connected longitudinally in sequence via connecting flanges 4 to form a single-layer instrument rack structure with a drain.

[0050] In one embodiment, such as Figure 6 , 7 As shown, when applied to instrument installations requiring drain valves, the instrument mounting module 1 and the drain valve and drain pipe module 2 need to be stacked vertically and assembled, which can be achieved simply by bolt connection. A junction box and cable connection module 3 are longitudinally connected to multiple instrument mounting modules 1 sequentially via connecting flanges 4, forming a multi-layer drainless instrument rack structure.

[0051] In one embodiment, such as Figure 8 As shown, when multiple sets of instruments need to be installed and a single instrument rack is insufficient, a horizontally expandable modular instrument rack can be used. The horizontally expanded instrument racks are connected only by horizontally expanding fixing bolts. For example... Figure 9 As shown, when multiple instrument sets need to be installed but lateral expansion is limited, this can be achieved by installing two instrument racks back-to-back. Only lateral expansion channel steel, connectors, and fixing bolts are required. That is, lateral splicing includes sequential splicing along the length of the instrument rack and / or back-to-back splicing along the width of the instrument rack.

[0052] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A modular prefabricated instrument rack for a thermal power plant, characterized in that, It includes at least one of an instrument installation module (1) and a drain valve and drain pipe module (2), as well as a junction box and cable connection module (3). The instrument installation module (1), the drain valve and drain pipe module (2) and the junction box and cable connection module (3) are independent of each other and can be spliced ​​and combined. The instrument mounting module (1) includes a first outer frame (11) made of perforated channel steel and an instrument mounting channel steel (12) adjustablely fixed inside the first outer frame (11). The instrument mounting channel steel (12) is used to fix the instrument assembly. The drain valve and drain pipe module (2) includes a second outer frame (21) made of perforated channel steel and a channel steel crossbar (22) adjustablely fixed inside the second outer frame (21). The channel steel crossbar (22) is used to fix the drain assembly. The junction box and cable connection module (3) includes a junction box (31) and a cable tray (32). The junction box (31) is fixed on the top of the instrument installation module (1) and / or the drain valve and drain pipe module (2). The instrument installation module (1) and the drain valve and drain pipe module (2) are provided with connecting flanges (4) at their upper and lower ends. The modules are spliced ​​longitudinally or laterally through the connecting flanges (4) and bolts.

2. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The modules that are spliced ​​longitudinally or laterally share a common junction box and cable wiring module (3), and the extension direction of the cable tray (32) is consistent with the splicing direction.

3. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The instrument components are fixed to the instrument mounting channel steel (12) by the instrument mounting bracket (19), and the instrument components are connected by the instrument tube (5). The instrument tube (5) is fixed to the instrument mounting channel steel (12) by the instrument tube clamp (13).

4. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The instrument assembly includes at least one of a pressure gauge (14), a secondary valve (16), a differential pressure gauge (15), and a three-valve manifold (17). The pressure gauge is any one of a pressure transmitter, a pressure switch, or a pressure gauge. The differential pressure gauge is a differential pressure transmitter or a differential pressure switch.

5. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The sewage discharge assembly includes a sewage discharge valve (23) and a sewage discharge pipe (24). One end of the sewage discharge valve (23) is connected to the instrument assembly through an instrument pipe (5), and the other end is connected to the sewage discharge pipe (24) through an instrument pipe (5). The instrument pipe (5) is fixed to the channel steel crossbar (22) through an instrument pipe clamp (13).

6. The modular prefabricated instrument rack for thermal power plants as described in claim 5, characterized in that, The drain pipes (24) of the multiple drain valves and drain pipe modules (2) are connected by flanges.

7. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The junction box and cable connection module (3), the instrument installation module (1), and the drain valve and drain pipe module (2) are connected longitudinally in sequence through the connecting flange (4) to form a single-layer instrument rack structure with drain.

8. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, One of the junction boxes and cable wiring modules (3) and multiple of the instrument mounting modules (1) are longitudinally connected in sequence through the connecting flanges (4) to form a multi-layer sewage-free instrument rack structure.

9. The modular prefabricated instrument rack for thermal power plants as described in claim 1, characterized in that, The lateral splicing includes sequential splicing along the length of the instrument frame and / or back-to-back splicing along the width of the instrument frame.

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