A local area network data transmission and equipment control system for intelligent temperature control of dams

Abstract

This utility model discloses a data transmission and equipment control system within a local area network for intelligent temperature control in a dam, belonging to the field of water conservancy engineering construction technology. It includes a server installed on the left bank material supply line platform and connected to a stable power grid via a dedicated power line. The server communicates with the on-site temperature control equipment and the work area camp via wireless bridging to achieve real-time data transmission and remote equipment control. A built-in cabinet is embedded in the corridor wall, housing an enterprise-grade gigabit router, a dual-band bridge, an outdoor wireless access point, and a PoE network switch to construct the local area network and achieve remote communication and equipment control. Two protective baffles are arranged parallel to each other on both sides of the built-in cabinet, with a buffer gap between them and the outer wall of the cabinet. This utility model enables continuous management of the temperature control equipment and communication nodes, improving the overall stability of the system.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy engineering construction technology, and in particular to a data transmission and equipment control system for a local area network of intelligent temperature control for dams. Background Technology

[0002] In the construction of large-scale water conservancy projects, especially during the dam construction phase, temperature control is one of the key factors in ensuring project quality and safety. Traditional temperature control systems typically rely on a combination of on-site sensors and manual monitoring for data collection and equipment adjustment. This approach is not only inefficient but also struggles to achieve real-time, accurate monitoring in the complex environments of construction sites. With the development of information technology, an increasing number of dam construction projects are adopting intelligent temperature control local area network systems to improve management efficiency. These systems utilize servers for centralized management and remote control of temperature control equipment. However, in practical applications, especially in harsh environments and complex terrain at construction sites, ensuring the stable operation of these communication devices has become a pressing issue.

[0003] Existing dam construction sites are usually located in remote areas with weak power grid infrastructure. Temperature control systems at dam construction sites often use ordinary power supply lines connected to temporary distribution boxes, lacking dedicated and stable power supply guarantees. This causes servers and communication equipment to frequently shut down and restart during voltage fluctuations or power outages. Frequent power outages can lead to data loss or communication interruptions, and data collected by temperature control sensors cannot be uploaded in a timely manner, potentially missing critical control opportunities and reducing the overall stability of the system. Utility Model Content

[0004] The purpose of this invention is to provide a data transmission and equipment control system within a local area network for intelligent temperature control of dams, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a data transmission and equipment control system within a local area network for intelligent temperature control of dams, suitable for large-scale water conservancy project construction sites, especially for dam gallery areas with complex structures. The system includes:

[0006] Server: Located on the left bank material supply line platform within the construction area, it is connected to a stable power grid via a dedicated power line to ensure continuous operation.

[0007] Communication network module: Integrated into the corridor's built-in cabinet, including enterprise-grade gigabit routers, dual-band bridges, outdoor wireless access points (APs), and PoE network switches.

[0008] The protective structure consists of two parallel protective baffles, a hydraulic damper, and a rubber protective pad, providing shock resistance, dustproof, and waterproof functions.

[0009] Heat dissipation device: including heat dissipation exhaust fans symmetrically installed on both sides of the cabinet side wall, and L-shaped exhaust pipes extending to the outside of the corridor wall.

[0010] In this preferred embodiment, the cabinet built into the corridor adopts an embedded design and is fixed inside the corridor wall at the dam construction site. A groove is excavated in the inner wall of the corridor to embed the cabinet. Gaps are reserved between the two sides of the cabinet and the inner wall of the groove to accommodate protective baffles. Symmetrical through holes are excavated on both sides of the groove inside the corridor wall, each through hole extending into the groove. A fastener is bolted to one end of each through hole on the outer side of the corridor wall to support and fix the L-shaped exhaust pipe.

[0011] In this preferred embodiment, two protective baffles are respectively installed parallel to each other on both sides of the cabinet inside the corridor, maintaining a certain buffer gap with the outer wall of the cabinet. Multiple hydraulic dampers are installed in each buffer gap to absorb vibrations and impacts from the outside. Four guide rods are installed in a rectangular pattern on the inner wall of each protective baffle. The guide rods are inserted into the side wall of the cabinet and connected to a fixing block at one end by bolts, forming a telescopic guide structure. The hydraulic dampers are also installed in a rectangular pattern on the inner wall of the protective baffle, with both ends connected to the protective baffle and the outer wall of the cabinet by bolts respectively. Holes are opened on the surface of the protective baffle for L-shaped exhaust pipes to pass through. One end of the L-shaped exhaust pipe is fixed to the outer wall of the cabinet, and the other end passes through the holes in the protective baffle and extends into a through-hole, finally abutting against the inner wall of the fixing component. In addition, rubber protective pads are adhered to the outer walls of the two protective baffles, with their outer edges tightly attached to the inner wall of the gap, further enhancing the auxiliary buffering performance of the entire cabinet system.

[0012] In this preferred embodiment, the corridor's built-in cabinet integrates various communication devices, constructing a complete local area network communication platform, as detailed below:

[0013] Enterprise-grade gigabit router: Installed inside the built-in cabinet in the corridor, it is responsible for managing the wired communication of the entire local area network. It supports AP controller function and can centrally manage multiple wireless access points (APs). The shell is made of weather-resistant materials and integrates shockproof design to adapt to harsh construction environments such as high temperature, high humidity and dust. Network parameters can be adjusted and faults can be troubleshooted through remote control.

[0014] Dual-band bridge: Equipped with multiple PoE gigabit ports, it supports long-distance (≥5 km) wireless communication with a wide coverage area. It is suitable for signal relay or long-distance transmission between different areas of the dam. The equipment shell has waterproof and dustproof interfaces and is made of high-strength weather-resistant materials to ensure stable operation under extreme weather conditions. It supports multi-path transmission mode to improve communication redundancy and stability.

[0015] Outdoor wireless access point (AP): Features dual-band capability with a maximum speed of 1900Mbps and a coverage radius of 250 meters. It uses PoE power supply to simplify cabling requirements. The reinforced base design provides excellent shock resistance, making it suitable for earthquake-prone areas. The specially treated material offers strong resistance to salt spray corrosion, making it suitable for coastal or chemically corrosive environments.

[0016] PoE network switch: Provides 4 Gigabit Ethernet ports with a total power of 60W, meeting the power supply needs of multiple devices at the same time. It adopts a modular design, supports hot-swappable replacement and upgrades, and is easy to maintain. Device replacement or function expansion can be completed without interrupting system operation. The internal circuit board is moisture-proof and anti-static, adapting to complex construction environments.

[0017] In this preferred embodiment, all connections between communication devices in the system utilize CAT6 oxygen-free pure copper twisted-pair cable for gigabit unshielded network engineering, equipped with Category 5e RJ45 connectors to meet the requirements of high-speed, low-latency data transmission. The cabling materials possess excellent tensile and abrasion resistance, effectively preventing physical damage during construction. Standardized cable interfaces facilitate quick plugging and unplugging and replacement. The overall cabling path is optimized to reduce electromagnetic interference and improve signal quality. All cables are housed within built-in cabinets within the corridor, avoiding exposure and potential damage.

[0018] In this preferred solution, to ensure the stability and safety of the communication equipment during long-term operation, the system is equipped with comprehensive heat dissipation and environmental adaptability measures: two heat dissipation exhaust fans are symmetrically installed on the inner walls of both sides of the cabinet, and the exhaust fan output ends are connected to L-shaped exhaust pipes to exhaust heat to the outside of the corridor wall. The hydraulic damper and the guide rod structure work together to absorb the vibration generated in the construction area. The rubber protective pads and protective baffles are tightly combined to prevent dust and rainwater from entering the cabinet. The outer shell of the communication equipment is made of high-strength, corrosion-resistant materials and has good outdoor adaptability.

[0019] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0020] The dam's intelligent temperature control local area network data transmission and equipment control system, by placing the server on the left bank material supply line platform and connecting it to a stable power grid via a dedicated power line, enables the server to operate stably for extended periods at the construction site, avoiding data interruptions caused by power fluctuations or outages. This setup provides reliable energy assurance for the entire system's control center, enabling continuous management of temperature control equipment and communication nodes, and ultimately improving the overall stability and availability of the system.

[0021] By employing a wireless bridging design to communicate with the server, on-site temperature control equipment, and work camp, the system can achieve remote data acquisition and equipment control even in complex construction environments, eliminating the need for traditional wired deployment. This wireless communication mechanism effectively solves the problems of complex terrain and difficult wiring at dam construction sites, enabling long-distance, low-latency data interaction and enhancing the system's deployment flexibility and adaptability.

[0022] By embedding the equipment racks within the corridor walls at the dam construction site, communication equipment can be centrally and securely arranged inside the structure, reducing the impact of the external environment on the equipment. This embedded installation method not only saves space but also enhances the overall aesthetics and security, achieving efficient utilization within limited space and improving equipment protection levels while reducing maintenance frequency.

[0023] By integrating enterprise-grade gigabit routers, dual-band bridges, outdoor wireless access points (APs), and PoE network switches within a built-in cabinet in the corridor, the system possesses complete LAN construction capabilities, enabling multi-device collaborative communication and centralized management. This modular integration approach simplifies the network topology, improves communication efficiency and scalability, and achieves rapid network setup and flexible access, ultimately building a highly reliable communication platform.

[0024] The design, featuring two symmetrically mounted cooling fans on either side of the cabinet's sidewalls and L-shaped exhaust pipes extending to the outer wall of the corridor, ensures timely heat dissipation from inside the cabinet, preventing performance degradation or damage caused by overheating. This active cooling mechanism, combined with optimized exhaust paths, achieves stable temperature control, ensuring reliable long-term equipment operation.

[0025] The design, featuring two parallel protective baffles on either side of the cabinet and a hydraulic damper within the buffer gap, provides excellent vibration damping protection against frequent vibrations at the construction site. The hydraulic damper absorbs external impacts, preventing vibrations from being directly transmitted to critical internal components, thus providing physical protection for the communication equipment and extending its lifespan while reducing failure rates. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1This is a schematic diagram of the overall construction of the local area network of this utility model;

[0028] Figure 2 This is a schematic diagram of the data transmission layout of the EL721m dam gallery equipment of this utility model.

[0029] Figure 3 This is a schematic diagram of the construction bureau camp network layout according to this utility model;

[0030] Figure 4 This is a schematic diagram of the on-site equipment layout for this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the corridor-integrated cabinet of this utility model, which is embedded in the corridor wall.

[0032] Figure 6 This is a schematic diagram of the installation structure of the protective baffle and the heat dissipation exhaust fan of this utility model;

[0033] Figure 7 This is a schematic diagram of the installation structure of the hydraulic damper of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] In the diagram: 10. Corridor wall; 20. Built-in chamber; 21. Protective gap; 30. Built-in cabinet in the corridor; 31. Cabinet cavity; 32. Cabinet door; 40. L-shaped cavity; 41. Dust filter; 50. Protective baffle; 51. Telescopic positioning rod; 52. Rubber protective pad; 53. Limiting plate; 54. Hydraulic damper; 55. Mounting hole; 60. Cooling exhaust fan; 61. L-shaped exhaust pipe. Detailed Implementation

[0036] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0037] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0038] This embodiment provides, for example Figures 1 to 7 The system shown is a local area network data transmission and equipment control system for intelligent temperature control of a dam, comprising:

[0039] The server, located within the construction area, is placed on the left bank material supply line platform and connected to a stable power grid via a dedicated power supply line. The server communicates with the on-site temperature control equipment and the work camp via wireless bridging to achieve real-time data transmission and remote control of the equipment.

[0040] The corridor-built cabinet 30 at the dam construction site is embedded in the corridor wall 10. The corridor-built cabinet 30 is equipped with an enterprise-level gigabit router, a dual-band bridge, an outdoor wireless access point (AP), and a PoE network switch, which are used to build a local area network and realize remote communication and equipment control.

[0041] Two protective baffles 50 are respectively arranged parallel to each other on both sides of the cabinet 30 built into the corridor, and there is a buffer gap between them and the outer wall of the cabinet 30 built into the corridor. Each buffer gap is provided with a hydraulic damper 54.

[0042] Two cooling exhaust fans 60 are symmetrically installed on the inner walls of the side walls 31 of the cabinet 30 inside the corridor. The output end of each cooling exhaust fan 60 extends to the outside of the corridor wall 10 through an L-shaped exhaust pipe 61.

[0043] In this embodiment, a groove 20 is excavated in the inner wall of the corridor wall 10, and the corridor built-in cabinet 30 is placed in the groove 20. A gap 21 for accommodating the protective baffle 50 is reserved between both sides of the corridor built-in cabinet 30 and the inner wall of the groove 20.

[0044] Symmetrical through holes 40 are excavated on both sides of the groove 20 and inside the corridor wall 10. Each through hole 40 extends into the groove 20, and a fastener 41 is installed at one end of each through hole 40 on the outside of the corridor wall 10 by bolts.

[0045] In this embodiment, four guide rods 51 are installed in a rectangular arrangement on the inner walls of the two protective baffles 50. One end of the guide rod 51 is inserted into the side wall 31 of the cabinet 30 in the corridor and a fixing block 53 is installed by bolts. Each protective baffle 50 has a hole 55 on its surface for the L-shaped exhaust pipe 61 to pass through.

[0046] One end of each of the two L-shaped exhaust pipes 61 is fixed to the outer walls of the two sides of the cabinet 30 built into the corridor, and is aligned with the output end of the heat dissipation exhaust fan 60; the L-shaped exhaust pipes 61 pass through the hole 55 and are accommodated in the through hole 40, and the end away from the cabinet 30 built into the corridor abuts against the inner wall of the fixing member 41.

[0047] In this embodiment, the hydraulic dampers 54 installed on the inner wall of each protective baffle 50 are installed in a rectangular distribution, and the two ends of each hydraulic damper 54 are respectively connected to the outer wall of the protective baffle 50 and the corridor built-in cabinet 30 by bolts.

[0048] In this embodiment, rubber protective pads 52 are adhered to the outer walls of both protective baffles 50, and the outer walls of the rubber protective pads 52 abut against the inner wall of the gap 21.

[0049] In this embodiment, the enterprise-grade gigabit router is used to manage the wired network communication of the entire local area network and integrates AP controller functions to support commercial application requirements. The router shell is made of weather-resistant materials and integrates shockproof design to ensure normal operation in harsh environments.

[0050] In this embodiment, the dual-band bridge is equipped with multiple PoE gigabit ports, covering a distance of at least 5 kilometers. It features waterproof and dustproof interfaces, and a high-strength, weather-resistant housing to ensure efficient data transmission performance even in harsh weather conditions. Specifically, it supports 2.4GHz and 5GHz dual-band communication, with a maximum speed exceeding 300Mbps, and supports MIMO antennas to improve signal quality and coverage. For long-distance transmission, it achieves signal coverage of over 5 kilometers through a directional antenna and power amplifier, supporting point-to-point or point-to-multipoint networking, and can act as a relay node to extend the wireless network. The interface uses waterproof RJ45 connectors, supports PoE power supply, and the housing is made of ABS+UV anti-aging material, resistant to high and low temperatures.

[0051] In this embodiment, the outdoor wireless access point (AP) features a 1900M Gigabit Ethernet port, dual-band capability, a coverage radius of 250 meters, a shock-resistant base, and resistance to salt spray and chemical corrosion, making it suitable for earthquake-prone and harsh environments. Specifically: Wireless coverage: Supports the 802.11ac standard, with a maximum dual-band concurrent speed of 1900Mbps; beamforming technology enhances signal strength and stability; supports multi-user MIMO to increase the number of concurrent connections. The base uses a metal casting and rubber shock-absorbing pads to enhance shock resistance, and the outer shell is coated with an anti-rust coating, achieving an IP67 protection rating.

[0052] In this embodiment, the PoE network switch has four gigabit ports with a total power of 60W. It supports online replacement and upgrades without interrupting the entire system, making maintenance simpler and faster. Specifically: each port supports a maximum power supply of 15.4W, with a total power not exceeding 60W; it supports the IEEE 802.3af / at standard; the data transmission rate is 1Gbps, and the latency is less than 1ms. It adopts a modular design, allowing for individual replacement of the power supply and ports; it supports online hot-swapping without affecting the operation of other ports; and it has a built-in fan and heatsink to maintain a good operating temperature.

[0053] In this embodiment, the control system uses Category 6 Gigabit unshielded network engineering cable (CAT6 oxygen-free pure copper twisted pair) as the main cabling material and is equipped with Category 5e RJ45 connectors to meet actual wiring requirements. The selection of cabling materials not only takes into account data transmission speed and reliability, but also introduces materials with strong tensile and abrasion resistance to adapt to the requirements of complex construction environments and reduce communication failures caused by physical damage.

[0054] Working principle

[0055] The dam's intelligent temperature control local area network data transmission and equipment control system places the main control server on the left bank material supply line platform, connected to a stable power grid. The server serves as the control center of the entire system, responsible for receiving sensor data, issuing control commands, and communicating with the remote monitoring center. A groove 20 is excavated inside the gallery wall 10 at the dam construction site to embed the gallery-built cabinet 30. Gaps 21 are reserved on both sides of the gallery-built cabinet 30 for installing protective baffles 50. The protective baffles 50 are connected to the outer wall of the cabinet via guide rods 51 and fixing blocks 53. Hydraulic dampers 54 are installed in the buffer gap to form a shock-absorbing structure. Rubber protective pads 52 are attached to the outside of the protective baffles 50 for further cushioning. The internal cabinet 30 in the corridor integrates core communication equipment such as enterprise-grade gigabit routers, dual-band bridges, outdoor wireless APs, and PoE switches. All equipment is networked through CAT6 oxygen-free pure copper twisted-pair cables, and the crystal head interfaces meet the Category 5e standard. The L-shaped exhaust pipe 61 runs through the corridor wall 10 and is connected to the heat dissipation exhaust fan 60 to ensure good heat dissipation of the equipment.

[0056] After the system is powered on, the server automatically starts and loads the operating system and control program. The built-in communication devices (router, switch, wireless AP) complete self-tests and initialization in sequence. The dual-band bridge and wireless AP establish signal coverage and build a local wireless network. The enterprise-grade gigabit router manages the IP allocation and routing policies of the entire local area network. The PoE network switch provides power and data interfaces for the on-site temperature control equipment. The outdoor wireless AP expands the wireless signal coverage radius and supports access for mobile terminals or remote monitoring equipment. The dual-band bridge enables long-distance (≥5 km) point-to-point or relay communication to ensure data backhaul from remote devices.

[0057] Multiple sensor nodes for temperature, humidity, and pressure are deployed at the dam construction site. These sensors are connected to a wireless access point (AP) or a local area network (LAN) via a bridge. Data is aggregated by a switch and uploaded to a server for centralized processing and storage. The server continuously monitors the temperature, humidity, and vibration within the cabinet 30 inside the corridor. The cooling exhaust fan 60 automatically starts and stops based on temperature changes inside the cabinet, while the L-shaped exhaust pipe 61 expels hot air to the outside. A hydraulic damper 54 absorbs vibrations and impacts from the construction area, protecting the equipment inside the cabinet.

[0058] The monitoring center can access the server via the internet to view on-site temperature control data. Based on the data analysis results, it can remotely issue control commands, such as adjusting cooling water flow and ventilation rate. These control commands are transmitted to the on-site execution equipment via a network bridge or wireless access point. The system has automated control logic; for example, it automatically activates the cooling device when the temperature exceeds a set threshold. When abnormal vibration is detected, the system triggers an alarm and records the event log. In the event of a network outage, the dual-band network bridge can switch to a backup link to ensure uninterrupted communication.

[0059] The PoE network switch adopts a modular design, supports online replacement of faulty modules, and enterprise-grade gigabit routers, wireless APs and other devices all have remote configuration functions, which facilitates subsequent parameter optimization. All communication equipment shells are waterproof, dustproof and salt spray resistant, extending service life. Firmware versions can be upgraded remotely to improve system stability and functionality. New devices can be quickly connected to the existing network architecture without rewiring. It supports the expansion of more temperature control nodes to meet the needs of dam projects of different scales.

[0060] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dam intelligent temperature control local area network data transmission and device joint control system, characterized in that, include: The server, located within the construction area, is placed on the left bank material supply line platform and connected to a stable power grid via a dedicated power supply line. The server communicates with the on-site temperature control equipment and the work camp via wireless bridging to achieve real-time data transmission and remote control of the equipment. The corridor built-in cabinet (30) at the dam construction site is embedded in the corridor wall (10). The corridor built-in cabinet (30) is equipped with an enterprise-level gigabit router, a dual-band bridge, an outdoor wireless access point (AP) and a POE network switch, which are used to build a local area network and realize remote communication and equipment control. Two protective baffles (50) are respectively arranged parallel to each other on both sides of the cabinet (30) inside the corridor, and there is a buffer gap between them and the outer wall of the cabinet (30) inside the corridor. Each buffer gap is provided with a hydraulic damper (54). Two heat dissipation exhaust fans (60) are symmetrically installed on the inner walls of the side walls (31) of the cabinet (30) inside the corridor. The output end of each heat dissipation exhaust fan (60) extends to the outside of the corridor wall (10) through an L-shaped exhaust pipe (61).

2. The data transmission and device control system in a smart temperature control local area network of a dam according to claim 1, characterized in that: The inner wall of the corridor wall (10) has a groove (20) excavated, and the corridor built-in cabinet (30) is placed in the groove (20). There are gaps (21) reserved between the two sides of the corridor built-in cabinet (30) and the inner wall of the groove (20) to accommodate the protective baffle (50). Symmetrical through holes (40) are excavated on both sides of the groove (20) and inside the corridor wall (10). Each through hole (40) extends into the groove (20), and a fastener (41) is installed at one end of each through hole (40) on the outside of the corridor wall (10) by bolts.

3. The data transmission and device control system in a smart temperature control local area network of a dam according to claim 2, characterized in that: Four guide rods (51) are installed in a rectangular arrangement on the inner walls of the two protective baffles (50). One end of the guide rod (51) is inserted into the side wall (31) of the cabinet (30) inside the corridor and a fixing block (53) is installed by bolts. Each protective baffle (50) has a hole (55) on its surface for the L-shaped exhaust pipe (61) to pass through. One end of each of the two L-shaped exhaust pipes (61) is fixed to the outer walls of the two sides of the cabinet (30) inside the corridor, and is aligned with the output end of the heat dissipation exhaust fan (60); the L-shaped exhaust pipe (61) passes through the hole (55) and is accommodated in the through hole (40), and the end away from the cabinet (30) inside the corridor abuts against the inner wall of the fixing member (41).

4. The data transmission and device control system in a smart temperature control local area network of a dam according to claim 3, characterized in that: The hydraulic dampers (54) installed on the inner wall of each of the protective baffles (50) are installed in a rectangular distribution. The two ends of each hydraulic damper (54) are connected to the outer wall of the protective baffle (50) and the inner wall of the corridor cabinet (30) by bolts.

5. The data transmission and device control system in a smart temperature control local area network of a dam according to claim 4, characterized in that: Both of the protective baffles (50) have rubber protective pads (52) bonded to their outer walls, and the outer walls of the rubber protective pads (52) abut against the inner wall of the gap (21).

6. The data transmission and device control system in a smart temperature control local area network of a dam according to claim 1, characterized in that: The enterprise-grade gigabit router is used to manage wired network communication for the entire local area network and integrates AP controller functions to support commercial application requirements.

7. The data transmission and equipment control system within a local area network for intelligent temperature control of a dam according to claim 1, characterized in that: The dual-band bridge is equipped with multiple PoE gigabit ports, covering a distance of at least 5 kilometers, and features waterproof and dustproof interfaces.

8. The data transmission and equipment control system within a local area network for intelligent temperature control of a dam according to claim 7, characterized in that: The outdoor wireless access point features a 1900M Gigabit port, dual-band capability, a coverage radius of up to 250 meters, a shockproof base, and resistance to salt spray and chemical corrosion, making it suitable for earthquake-prone and harsh environments.

9. The data transmission and equipment control system within a local area network for intelligent temperature control of a dam according to claim 7, characterized in that: The PoE network switch has four gigabit ports, a total power of 60W, and supports online replacement and upgrades without interrupting the entire system operation, making maintenance simpler and faster.

10. The data transmission and equipment control system within a local area network for intelligent temperature control of a dam according to claim 9, characterized in that: The control system uses Category 6 Gigabit unshielded network cabling (CAT6) oxygen-free pure copper twisted pair as the main cabling material and is equipped with Category 5e RJ45 connectors.

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