Modular mechanical reconstruction structure applied to capacity expansion of DCS system of thermal power plant

Abstract

The utility model discloses a modularization mechanical reconstruction structure for DCS system expansion of thermal power plant, including thermal control survey point module, extension control cabinet, actuating mechanism interface box, thermal control survey point module, extension control cabinet, actuating mechanism interface box constitute a set of modularization mechanical reconstruction structure for DCS system expansion of thermal power plant, have the technical features such as cabinet layered adjustable, wire arrangement neat, terminal row prevents false insertion design, installation and maintenance efficient convenient.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation control hardware structure, and to an adaptive modification structure for DCS control system. More specifically, it relates to a modular mechanical modification structure for expanding DCS systems in thermal power plants, particularly for the physical adaptability design of measuring point installation, cabinet expansion, and actuator interfaces. Background Technology

[0002] Traditional DCS retrofitting has three major drawbacks: newly added measuring points are directly welded to pipes, causing vibration to lead to signal drift (error > ±1.5%); expansion cabinets use a uniform height frame, resulting in insufficient heat dissipation space for I / O cards (temperature rise > 15℃); and exposed wiring of actuators causes electromagnetic interference to cause control signal distortion of up to 3%. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a modular mechanical modification structure for expanding the DCS system of thermal power plants, featuring simple structure and flexible expansion capabilities.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] This utility model discloses a modular mechanical modification structure for expanding the DCS system of a thermal power plant, including a thermal control measurement point module, an extended control cabinet, and an actuator interface box; the thermal control measurement point module, the extended control cabinet, and the actuator interface box constitute a modular mechanical modification structure for expanding the DCS system of a thermal power plant.

[0006] The thermal control measurement module includes a frame, with a 3-5mm thick silicone shock-absorbing layer at the bottom of the frame, quick-connect terminal blocks installed on the side, and the terminal blocks integrating 16 channels. The top of the frame is covered with a transparent protective cover.

[0007] The expansion control cabinet is equipped with a layered modular installation frame with adjustable layer height. The upper layer of the layered modular installation frame is used to install I / O cards via slide rails, and the lower layer is used to fix redundant power distribution units. The back of the expansion control cabinet is equipped with a vertical cable management channel with a width of 80mm, which is divided into a high-voltage area and a low-voltage area.

[0008] The actuator interface box includes a housing with a thickness of ≥2mm. The actuator interface box integrates a signal isolator and a multi-channel wiring adapter board. Both the signal isolator and the multi-channel wiring adapter board are connected to an IP67 waterproof aviation plug. The aviation plug can be connected to a pluggable connector with a copper mesh shielding layer.

[0009] Preferably, the layer spacing of the layered modular mounting frame is adjustable from 40 to 100 mm, and the slide rails on both sides are provided with positioning holes every 10 mm, which are locked by spring pins.

[0010] Preferably, the vertical cable management groove is provided with a detachable ABS cable divider, the height of which is 2 / 3 of the groove depth, and cable tie fixing grooves are distributed in the vertical cable management groove.

[0011] Preferably, the terminal block has a 45° inclined wiring port and an anti-misinsertion guide groove 103b at the entrance.

[0012] Preferably, the housing is an explosion-proof housing made of 304 stainless steel.

[0013] Preferably, an annular sealing silicone ring with a compression rate of 25%-30% is provided between the pluggable connector and the aviation plug.

[0014] Beneficial effects: 1. Convenient maintenance: The cabinet has adjustable layers, neat cable management, and terminal blocks designed to prevent misinsertion, making installation and maintenance efficient and convenient; 2. Flexible expansion: The cabinet supports flexible addition of I / O cards, redundant power supplies, and strong and weak current partitions, facilitating system function upgrades; 3. High-quality signal: The interface box integrates isolators and shielding connections, effectively resisting interference and ensuring accurate and stable signal transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the layered modular installation frame structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the vertical cable management groove structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the pluggable connector structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the connection between the signal isolator and the multi-channel wiring adapter board of this utility model.

[0020] Figure 6 This is a schematic diagram of the wiring port of the terminal block of this utility model. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] This utility model discloses a modular mechanical modification structure for expanding a DCS system in a thermal power plant, comprising a thermal control measurement point module 1, an expansion control cabinet 2, and an actuator interface box 3. The thermal control measurement point module 1, the expansion control cabinet 2, and the actuator interface box 3 together form a modular mechanical modification structure for expanding a DCS system in a thermal power plant. The thermal control measurement point module 1 includes a frame with a 3-5mm thick silicone shock-absorbing layer at the bottom, and quick-connect terminal blocks 103 integrated on the sides, with 16 channels integrated on the terminal blocks 103. The top of the frame is covered with a transparent protective cover 103a. The expansion control cabinet 2 has an adjustable-height, layered modular mounting frame. The frame 201 is a layered modular mounting frame. The upper layer of the frame 201 is used to install I / O cards 202 via slide rails 201a, and the lower layer is used to fix redundant power distribution units 203. The back of the expansion control cabinet 2 is provided with a vertical cable management channel 204 with a width of 80mm. The vertical cable management channel 204 is internally divided into a high-voltage area and a low-voltage area. The actuator interface box 3 includes a shell with a thickness of ≥2mm. The actuator interface box 3 integrates a signal isolator 302 and a multi-channel wiring adapter board 303. The signal isolator 302 and the multi-channel wiring adapter board 303 are both connected to an IP67 waterproof aviation plug. The aviation plug can be connected to a pluggable connector 305 with a copper mesh shielding layer.

[0025] In a preferred embodiment, the interlayer spacing of the layered modular mounting frame 201 is adjustable from 40 to 100 mm, and the slide rails 201a on both sides are provided with positioning holes 201b every 10 mm, which are locked by spring pins.

[0026] In a preferred embodiment, the vertical cable management groove 204 is provided with a detachable ABS cable divider 204a, the height of which is 2 / 3 of the groove depth, and cable tie fixing grooves 204b are distributed within the vertical cable management groove 204.

[0027] In a preferred embodiment, the terminal block 103 has a 45° inclined wiring port and an anti-misinsertion guide groove 103b at the entrance.

[0028] In a preferred embodiment, the housing is an explosion-proof housing made of 304 stainless steel.

[0029] In a preferred embodiment, an annular sealing silicone ring 306 with a compression rate of 25%-30% is provided between the housing and the aviation plug 304.

[0030] Core structural description of this application

[0031] 1. Thermal control measurement point module

[0032] Frame design: The bottom of the main frame 101 integrates a 3-5mm silicone shock-absorbing buffer layer (the measured vibration acceleration attenuation rate reaches 84%, such as 5g to 0.8g).

[0033] Terminal block innovation: The side is equipped with a quick-connect terminal block 103, which integrates 16 high-density channels. The wiring port adopts a 45° inclined design and is equipped with a guide groove 103b to prevent mis-insertion. The single-point wiring time is ≤8 seconds (traditional soldering requires 120 seconds).

[0034] Protection: The top is covered with a transparent protective cover 103a, which combines operational visibility with physical protection.

[0035] 2. Expand control cabinet

[0036] Modular installation frame: The layered modular installation frame 201 supports stepless adjustment of the layer height from 40 to 100 mm. The slide rails 201a on both sides are equipped with positioning holes 201b with a spacing of 10 mm, which can be quickly locked by spring pins.

[0037] Zoning Layout: The upper layer features sliding rails for mounting I / O cards 202; the lower layer houses a fixed redundant power distribution unit 203 to ensure power supply reliability. Cable Management System: The rear is equipped with an 80mm wide vertical cable management channel 204, with built-in ABS cable dividers 204a (height occupying 2 / 3 of the channel depth) to separate high-voltage and low-voltage areas; the channel also features cable tie fixing grooves 204b to optimize cable management.

[0038] 3. Actuator Interface Box

[0039] Housing structure: The housing is made of ≥2mm thick 304 stainless steel explosion-proof housing 301, which has passed ATEX explosion-proof certification.

[0040] Internal integration: Signal isolator 302: isolates interference signals; Multi-channel wiring adapter board 303: supports multi-channel signal conversion. Waterproof connection: connects to external devices via an IP67-rated aviation plug, with a ring-shaped silicone seal 306 (compression rate 25%-30%) between the plug and the housing to ensure dust and water resistance; the plug has a built-in copper mesh shielding layer to enhance anti-interference capabilities.

[0041] The layered frame is precisely adjustable. The adjustment mechanism is as follows: the layer spacing is achieved through stepped positioning holes 201b on the side of the slide rail 201a, with each hole spaced 10mm apart; spring pin locking: after being inserted into the positioning hole, it automatically springs up and locks to prevent displacement. Application scenario: the upper layer is adjusted to 60mm to install AI cards, and the lower layer is adjusted to 80mm to fix the power supply unit, adapting to different device sizes.

[0042] Cable management zoning design: The ABS 204a cable dividers are removable, allowing for the division of high-voltage (220VAC) and low-voltage (4-20mA) areas as needed; the height is 2 / 3 of the channel depth (approximately 53mm), with space reserved for overhead cable routing. Cable fixing: The bottom of the channel has pre-cast cable tie grooves (204b) to prevent cable ties from protruding and affecting cable management.

[0043] Terminal block anti-misinsertion optimization: 45° tilted wiring port: optimized operating view; anti-misinsertion guide groove 103b: forces the correct insertion of cables, reducing the risk of short circuits. Explosion-proof housing upgrade: 304 stainless steel housing: corrosion resistant, impact resistant, suitable for high dust environments such as coal-fired conveyor belts; ATEX certified: meets the standards for use in explosive gas environments.

[0044] Aviation plug sealing enhancement, dynamic silicone ring sealing: compression ratio 25%-30%: overpressure leads to seal failure, underpressure leads to leakage, this range balances sealing performance and insertion / removal life; 306 annular silicone ring is pre-embedded in the plug socket, forming a double waterproof barrier after compression.

[0045] Example 1: In the renovation of a 660MW unit, the thermal control measuring point module 1 is installed on the main steam pipeline. The buffer layer reduces the vibration acceleration from 5g to 0.8g. The terminal block 103 achieves a single-point wiring time of ≤8 seconds, which is 120 seconds compared to traditional welding.

[0046] Example 2: The layered frame 201 of the extended cabinet 2 is adjusted so that the AI ​​card is installed at 60mm on the upper layer and the power unit is installed at 80mm on the lower layer. The cable tray 204 has a cable divider 204a to isolate the 220VAC and 4-20mA lines. The temperature rise inside the cabinet is controlled to be <7℃.

[0047] Example 3: The actuator interface box 3 is used in a coal-fired conveyor belt environment. The explosion-proof housing is ATEX certified, and the shielded connector improves the signal-to-noise ratio to 42dB compared to 28dB before the modification.

[0048] Application Example Verification - Summary of Technical Advantages

[0049] Module Innovation Engineering value Thermal control measurement module Silicone buffer + quick-connect terminal block Vibration resistance improved by 84%, wiring efficiency increased by 15 times. Expand control cabinet Adjustable floor height frame + cable management duct partition Space utilization increased by 30%, temperature control and EMC optimized. Actuator Interface Box Explosion-proof housing + waterproof shielded connector Signal-to-noise ratio increased by 50%, suitable for high-risk environments

[0050] The design structure of this application solves the problems of mechanical compatibility, installation efficiency and environmental adaptability in DCS expansion through modular design, and is especially suitable for space-constrained scenarios in the renovation of old factories.

[0051] Finally, it should be noted that this utility model is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A modular mechanical modification structure for expanding the DCS system of a thermal power plant, characterized in that, It includes a thermal control measurement point module (1), an expansion control cabinet (2), and an actuator interface box (3); the thermal control measurement point module (1), the expansion control cabinet (2), and the actuator interface box (3) together form a modular mechanical modification structure for the expansion of the DCS system of a thermal power plant; The thermal control measuring point module (1) includes a frame, with a silicone shockproof buffer layer of 3-5mm thickness at the bottom of the frame, and a quick-connect terminal block (103) installed on the side. The terminal block (103) integrates 16 channels, and the top of the frame is covered with a transparent protective cover (103a). The extended control cabinet (2) is equipped with a layered modular mounting frame (201) with adjustable layer height. The upper layer of the layered modular mounting frame (201) is used to install I / O cards (202) via slide rails (201a), and the lower layer is used to fix redundant power distribution units (203). The back of the extended control cabinet (2) is equipped with a vertical cable management channel (204) with a width of 80mm. The vertical cable management channel (204) is divided into a high-voltage area and a low-voltage area. The actuator interface box (3) includes a housing with a thickness of ≥2mm. The actuator interface box (3) integrates a signal isolator (302) and a multi-channel wiring adapter board (303). The signal isolator (302) and the multi-channel wiring adapter board (303) are both connected to an IP67 waterproof aviation plug. The aviation plug can be connected to a pluggable connector (305) with a copper mesh shielding layer.

2. The modular mechanical modification structure for expanding the DCS system of a thermal power plant according to claim 1, characterized in that: The layer spacing of the layered modular mounting frame (201) is adjustable from 40 to 100 mm. The slide rails on both sides (201a) are provided with positioning holes (201b) every 10 mm, which are locked by spring pins.

3. A modular mechanical modification structure for expanding the DCS system of a thermal power plant, as described in claim 1 or 2, characterized in that: The vertical cable management groove (204) is provided with a detachable ABS cable divider (204a). The height of the ABS cable divider (204a) is 2 / 3 of the groove depth. Cable tie fixing grooves (204b) are distributed in the vertical cable management groove (204).

4. The modular mechanical modification structure for expanding the DCS system of a thermal power plant according to claim 1, characterized in that: The terminal block (103) has a 45° inclined wiring port design, and an anti-misinsertion guide groove (103b) is provided at the entrance.

5. The modular mechanical modification structure for expanding the DCS system of a thermal power plant according to claim 1, characterized in that: The housing is a 304 stainless steel explosion-proof housing.

6. A modular mechanical modification structure for expanding the DCS system of a thermal power plant, as described in claim 1 or 5, characterized in that: An annular sealing silicone ring (306) is provided between the pluggable connector (305) and the aviation plug.

Images