Explosion-proof secondary water supply system electric control cabinet

Abstract

The utility model relates to an explosion-proof electric control cabinet for a secondary water supply system. According to the main technical scheme, the explosion-proof electric control cabinet comprises an electric control cabinet body, an explosion-proof plate, a sliding rail type installation structure, a first heat dissipation structure and a second heat dissipation structure, the electric control cabinet body is divided into a power cavity, an instrument cavity and a control cavity through the explosion-proof plate, and the power cavity is formed in the first side of the electric control cabinet body in the horizontal transverse direction; the control cavity and the instrument cavity are arranged on the same side of the second side of the electric control cabinet body in the horizontal transverse direction, the instrument cavity is arranged below the control cavity, the power cavity is divided into at least one power sub-cavity in the vertical direction of the electric control cabinet body through a sliding rail type installation structure, and the first heat dissipation structure is used for conducting heat dissipation on the power cavity. The second heat dissipation structure is used for heat dissipation of the control cavity, a high-heating part can be separated from a sensitive instrument, the explosion risk is reduced, electromagnetic interference is reduced, the independent heat dissipation structure is arranged to increase the heat dissipation strength of the heat production cavity, and the safety of the explosion-proof type secondary water supply system electric control cabinet is guaranteed to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of secondary water supply system control technology, and in particular to an explosion-proof secondary water supply system electrical control cabinet. Background Technology

[0002] Explosion-proof secondary water supply systems, based on the principle of secondary water supply, employ explosion-proof design to meet the water supply needs of flammable and explosive environments. The electrical control cabinet is the core control unit of the explosion-proof secondary water supply system, responsible for monitoring, regulating, and protecting the operation of the water supply equipment.

[0003] Traditional explosion-proof secondary water supply system control cabinets have highly sealed explosion-proof modules, making it difficult to effectively dissipate the high heat generated by the frequency converter during operation. This results in a shortened lifespan of components. Furthermore, the compact layout of components inside the cabinet requires a complete power outage during maintenance, affecting the continuity of water supply and making maintenance inconvenient. The lack of isolation between power equipment (such as the frequency converter) and instrument signal lines can easily lead to electromagnetic interference or electrical sparks. The fixed cabinet structure makes it difficult to adapt to frequency converters of different power levels, resulting in poor expandability and compromising the safety of the explosion-proof secondary water supply system control cabinet. Utility Model Content

[0004] Based on this, the present invention provides an explosion-proof secondary water supply system electrical control cabinet to solve the technical problem that it is difficult to ensure the safety of the explosion-proof secondary water supply system electrical control cabinet due to insufficient heat dissipation, inconvenient maintenance, signal interference and poor expandability.

[0005] In one aspect, an explosion-proof secondary water supply system electrical control cabinet is provided, comprising: an electrical control cabinet body, an explosion-proof plate, a slide rail mounting structure, a first heat dissipation structure, and a second heat dissipation structure;

[0006] The electrical control cabinet is divided into a power chamber, an instrument chamber, and a control chamber by an explosion-proof plate. The power chamber is formed on the first horizontal side of the electrical control cabinet. The control chamber and the instrument chamber are located on the second horizontal side of the electrical control cabinet. The instrument chamber is located below the control chamber. The power chamber is divided into at least one power sub-chamber in the vertical direction of the electrical control cabinet by a sliding rail mounting structure.

[0007] The first heat dissipation structure is used to dissipate heat from the power chamber, and the second heat dissipation structure is used to dissipate heat from the control chamber.

[0008] According to one achievable method in an embodiment of this application, the first heat dissipation structure includes at least one air inlet component and an air outlet, and the second heat dissipation structure includes heat dissipation fins.

[0009] The air intake assembly is located at the top of the electrical control cabinet, the air outlet is located at the bottom of the power chamber, and the top of the power chamber is provided with ventilation holes.

[0010] The air intake assembly includes an explosion-proof axial flow fan, a labyrinth-type air inlet, and a flame-retardant sponge. The explosion-proof axial flow fan is positioned above the labyrinth-type air inlet, and the flame-retardant sponge is positioned below the labyrinth-type air inlet. The labyrinth-type air inlet is installed through the top of the electrical control cabinet. The explosion-proof axial flow fan is located on the outer side of the top of the electrical control cabinet, and the flame-retardant sponge is in close contact with the inner side of the top of the electrical control cabinet.

[0011] The right wall of the control cavity is equipped with heat dissipation fins.

[0012] According to one embodiment of this application, the slide rail mounting structure includes a slide rail, a frequency converter and an output filter are disposed in the power sub-cavity, the output terminal of the frequency converter is connected to the output filter, and the frequency converter and the output filter are disposed on the slide rail and can be extracted from the power sub-cavity along the slide rail.

[0013] According to one possible implementation method in the embodiments of this application, a safety barrier signal isolator, an intrinsically safe terminal block and a relay are provided in the instrument cavity, and the instrument cavity is connected to an external instrument via an aviation plug.

[0014] According to one possible implementation method in an embodiment of this application, a programmable logic controller is provided inside the control cavity.

[0015] According to one achievable method in the embodiments of this application, at least one first explosion-proof gland is provided on the bottom outer side of the instrument cavity, and at least one second explosion-proof gland is provided on the left side of the power cavity. The first explosion-proof gland is used to connect to the signal cable, and the second explosion-proof gland is used to connect to the power cable. The gap between the power cable or the signal cable is filled with explosion-proof putty.

[0016] According to one possible implementation method in the embodiments of this application, temperature sensors are respectively installed in the power cavity, instrument cavity and control cavity to detect the temperature in the power cavity, instrument cavity and control cavity, and automatically trigger audible and visual alarms when the temperature exceeds the limit.

[0017] According to one possible implementation method in the embodiments of this application, the control cavity and the instrument cavity are each hinged with a front-opening cabinet door, the cabinet door of the control cavity is provided with a viewing window, and an explosion-proof touch screen is embedded on the outside of the viewing window.

[0018] According to one possible implementation method in the embodiments of this application, a wireless communication module is provided inside the control cavity to enable users to remotely monitor the status of the equipment.

[0019] According to one possible implementation method in the embodiments of this application, the bottom of the electrical control cabinet is provided with support legs.

[0020] According to the technical content provided in this utility model embodiment, the explosion-proof secondary water supply system electrical control cabinet includes an electrical control cabinet body, an explosion-proof plate, a slide rail mounting structure, a first heat dissipation structure, and a second heat dissipation structure. The electrical control cabinet body is divided into a power chamber, an instrument chamber, and a control chamber by the explosion-proof plate. The power chamber is formed on the first horizontal side of the electrical control cabinet body. The control chamber and the instrument chamber are located on the second horizontal side of the electrical control cabinet body. The instrument chamber is located below the control chamber. The power chamber is divided into at least one power sub-chamber in the vertical direction of the electrical control cabinet body by the slide rail mounting structure. The first heat dissipation structure is used to dissipate heat from the power chamber, and the second heat dissipation structure is used to dissipate heat from the control chamber. By separating high-heat-generating components from sensitive instruments through the chamber isolation method, the risk of explosion is reduced, electromagnetic interference is reduced, and an independent heat dissipation structure is set to increase the heat dissipation of the heat-generating chamber. The slide rail mounting structure enables the setting of the number of power devices and the removal and placement of individual power devices, which facilitates the maintenance of power devices and maximizes the safety of the explosion-proof secondary water supply system electrical control cabinet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the electrical control cabinet of an explosion-proof secondary water supply system in one embodiment.

[0022] Figure 2 This is a schematic diagram of the air intake assembly in one embodiment;

[0023] Figure 3 This is a schematic diagram of the heat dissipation fins in one embodiment;

[0024] Figure 4 This is a side view of the electrical control cabinet of an explosion-proof secondary water supply system in one embodiment. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Figure 1 A schematic diagram of the structure of the electrical control cabinet for an explosion-proof secondary water supply system according to an embodiment of this utility model is shown. Figure 1 As shown, the explosion-proof secondary water supply system electrical control cabinet includes: electrical control cabinet body 110, explosion-proof plate 120, slide rail mounting structure, first heat dissipation structure and second heat dissipation structure.

[0027] The electrical control cabinet 110 is divided into a power chamber 111, an instrument chamber 112, and a control chamber 113 by an explosion-proof plate 120. The cabinet 110 is welded from 304 stainless steel, and the explosion-proof plate 120 is a double-layer explosion-proof plate. The power chamber 111 is formed on the first side of the horizontal transverse AB of the cabinet 110, i.e., the left side of the cabinet 110. The control chamber 113 and the instrument chamber 112 are located on the second side of the horizontal transverse AB of the cabinet 110, i.e., the right side of the cabinet 110. The instrument chamber 112 is located below the control chamber 113. The power equipment placed in the power chamber 111 is a high-heat-generating component, which may be a frequency converter. The instrument chamber 112 contains sensitive instruments. The separation of the high-heat-generating component from the sensitive instruments through the chamber isolation reduces the risk of explosion and also reduces electromagnetic interference.

[0028] The power chamber 111 is divided into at least one power sub-chamber 111-1 on the vertical CD of the electrical control cabinet 110 via a slide rail mounting structure. The slide rail mounting structure includes at least one slide rail 131. A preset number of slide rails 131 can be configured to obtain a corresponding number of power sub-chambers 111-1 to accommodate power equipment of different power ratings. The slide rail mounting structure also allows for the placement and removal of individual power equipment. The first heat dissipation structure includes an air inlet assembly 141 and an air outlet 142, forming an independent air duct system for cooling the power chamber 111. The second heat dissipation structure includes heat dissipation fins 151 for cooling the control chamber 113. No heat-generating devices are located in the instrument chamber 112; therefore, no heat dissipation structure is currently provided there.

[0029] In this embodiment of the invention, the electrical control cabinet is divided into a power chamber, an instrument chamber, and a control chamber by an explosion-proof plate. The power chamber is formed on the first horizontal side of the electrical control cabinet, while the control chamber and instrument chamber are located on the second horizontal side of the electrical control cabinet. This chamber separation method isolates high-heat-generating components from sensitive instruments, reducing the risk of explosion and electromagnetic interference. The power chamber is vertically divided into at least one power sub-chamber by a sliding rail mounting structure. This sliding rail mounting structure allows for the setting of the number of power devices and the placement and removal of individual power devices, facilitating the maintenance of the power devices. A first heat dissipation structure is used to dissipate heat from the power chamber, and a second heat dissipation structure is used to dissipate heat from the control chamber. The independent heat dissipation structure increases the heat dissipation capacity of the heat-generating chamber, maximizing the safety of the explosion-proof secondary water supply system electrical control cabinet.

[0030] As an feasible approach, the air inlet assembly 141 is located at the top of the electrical control cabinet 110, and the air outlet 142 is located at the bottom of the power chamber 111. The top of the power chamber 111 is provided with a vent hole. External air flows into the electrical control cabinet 110 through the air inlet assembly 141, enters the power chamber 111 through the vent hole at the top of the power chamber 111, and finally flows out through the air outlet 142 at the bottom of the power chamber 111, forming an independent air duct system with "top inlet and bottom outlet" forced air cooling circulation. This can reduce the temperature inside the power chamber 111 by more than 35% and reduce the failure rate of power equipment by 50%.

[0031] Specifically, such as Figure 2 As shown, the air intake assembly 141 includes an explosion-proof axial flow fan 141-1, a labyrinth-type air inlet 141-2, and a flame-retardant sponge 141-3. The explosion-proof axial flow fan 141-1 is positioned above the labyrinth-type air inlet 141-2, and the flame-retardant sponge 141-3 is positioned below the labyrinth-type air inlet 141-2. The labyrinth-type air inlet 141-2 extends through the top of the electrical control cabinet 110. The explosion-proof axial flow fan 141-1 is located on the outer side of the top of the electrical control cabinet 110, and the flame-retardant sponge 141-3 is in close contact with the inner side of the top of the electrical control cabinet 110. The explosion-proof axial flow fan 141-1 is specially designed to prevent sparks, ensuring safe operation in hazardous environments, providing strong airflow capacity, and increasing heat dissipation. The labyrinth-type air inlet 141-2, by changing the path and direction of airflow, increases the attenuation of sound during propagation, thereby further reducing the penetration of noise. Flame-retardant sponge 141-3 effectively suppresses the spread of fire. The air intake assembly 141, composed of an explosion-proof axial flow fan 141-1, a labyrinth-type air inlet 141-2, and flame-retardant sponge 141-3, improves ventilation efficiency while reducing noise and effectively suppressing combustion characteristics, thereby ensuring the safety of the explosion-proof secondary water supply system's electrical control cabinet as much as possible. One or more air intake assemblies 141 can be installed as needed; this is not limited here.

[0032] A heat dissipation fin 151 is provided on the right side wall of the control cavity 113. That is, a heat dissipation fin 151 is provided on the outside right side of the electrical control cabinet 110. The heat dissipation fin 151 can be made of aluminum. The structural schematic diagram of the heat dissipation fin 151 is shown below. Figure 3 As shown, the control cavity 113 is passively cooled by aluminum heat sink fins to avoid air exchange between the inside and outside.

[0033] As a feasible approach, such as Figure 4As shown, the slide rail mounting structure includes a slide rail 131. A frequency converter 111-11 and an output filter 111-12 are installed inside the power sub-cavity 111-1. The output terminal of the frequency converter 111-11 is connected to the output filter 111-12, which can be a magnetic ring filter. The frequency converter 111-11 and the output filter 111-12 are mounted on the slide rail 131 and can be pulled out of the power sub-cavity along the slide rail 131. This allows for power-off maintenance of a single frequency converter 111-11, reducing maintenance time to within 15 minutes without requiring a complete power outage, thus ensuring the continuity of water supply in the explosion-proof secondary water supply system. Adding a magnetic ring filter to the output terminal of the frequency converter 111-11 can suppress electromagnetic interference. Figure 4 The side structure diagram shown is based on the placement of 3 power units. Other numbers of power units can be set according to actual needs, and there is no limitation here.

[0034] The number of slide rails 131 in the sliding rail mounting structure can be set according to the number of power equipment, or a certain number of slide rails 131 can be pre-set according to requirements. For example, if three small-power frequency converters 111-11 need to be placed in the power chamber 111, the number of slide rails 131 in the sliding rail mounting structure is set to 3. Alternatively, in practical applications, different scenarios require different numbers of frequency converters 111-11, ranging from 3 to 8. The number of slide rails 131 in the sliding rail mounting structure is set to 10, and the corresponding number of frequency converters 111-11 is placed according to different scenarios. This can accommodate frequency converters of different power or number, effectively improving the expandability of the electrical control cabinet of the explosion-proof secondary water supply system.

[0035] As one possible approach, the instrument cavity 112 is equipped with a safety barrier signal isolator 112-1, an intrinsically safe terminal block 112-2, and a relay 112-3. The instrument cavity 112 is connected to external instruments via an M12 aviation plug. The external instruments may include explosion-proof pressure transmitters, flow meters, level sensors, and other instruments.

[0036] The control cavity 113 is equipped with a programmable logic controller 113-1 (PLC).

[0037] The instrument signal is connected to the PLC after passing through the safety barrier signal isolator 112-1 to achieve intrinsically safe loop isolation, thereby reducing the false alarm rate by 90%.

[0038] As one possible approach, at least one first explosion-proof gland 160-1 is provided on the bottom outer side of the instrument cavity 112, and at least one second explosion-proof gland 160-2 is provided on the left side of the power cavity. The first explosion-proof gland 160-1 is used to connect to the signal cable, and the second explosion-proof gland 160-2 is used to connect to the power cable. The gap between the power cable or the signal cable is filled with explosion-proof sealant.

[0039] As an example, temperature sensors 170 are installed in the power chamber 111, instrument chamber 112 and control chamber 113 respectively to detect the temperature in the power chamber 111, instrument chamber 112 and control chamber 113. When the temperature exceeds the limit, an audible and visual alarm is automatically triggered to remind the user to reduce the output frequency of the frequency converter 111-11 in order to reduce the temperature of the frequency converter 111-11.

[0040] As an example, the instrument chamber 112 and the control chamber 113 are each hinged with a front-opening cabinet door. The cabinet door of the control chamber 113 is provided with a viewing window 113-2. An explosion-proof touch screen 113-3 is embedded on the outside of the viewing window 113-2. The explosion-proof touch screen 113-3 can display information such as water pump pressure, flow rate and temperature and humidity inside the cabinet in real time.

[0041] As an alternative approach, a wireless communication module can also be installed inside the control cavity 113 to enable users to remotely monitor the equipment status via a 4G / 5G network.

[0042] As an alternative, the bottom of the electrical control cabinet 110 is provided with support legs 110-1 to ensure effective heat dissipation at the bottom of the electrical control cabinet 110 and the access of related devices.

[0043] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An explosion-proof secondary water supply system electrical control cabinet, characterized in that, include: The electrical control cabinet includes a cabinet body, explosion-proof plate, sliding rail mounting structure, first heat dissipation structure, and second heat dissipation structure. The electrical control cabinet is divided into a power chamber, an instrument chamber, and a control chamber by the explosion-proof plate. The power chamber is formed on the first horizontal side of the electrical control cabinet. The control chamber and the instrument chamber are located on the same side on the second horizontal side of the electrical control cabinet. The instrument chamber is located below the control chamber. The power chamber is divided into at least one power sub-chamber in the vertical direction of the electrical control cabinet by the slide rail mounting structure. The first heat dissipation structure is used to dissipate heat from the power cavity, and the second heat dissipation structure is used to dissipate heat from the control cavity.

2. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The first heat dissipation structure includes at least one air inlet component and an air outlet, and the second heat dissipation structure includes heat dissipation fins; The air inlet assembly is located at the top of the electrical control cabinet, the air outlet is located at the bottom of the power chamber, and the top of the power chamber is provided with a vent hole. The air intake assembly includes an explosion-proof axial flow fan, a labyrinth-type air inlet, and a flame-retardant sponge. The explosion-proof axial flow fan is positioned above the labyrinth-type air inlet, and the flame-retardant sponge is positioned below the labyrinth-type air inlet. The labyrinth-type air inlet extends through the top of the electrical control cabinet. The explosion-proof axial flow fan is located on the outer side of the top of the electrical control cabinet, and the flame-retardant sponge is in close contact with the inner side of the top of the electrical control cabinet. The heat dissipation fins are provided on the right side wall of the control cavity.

3. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The slide rail mounting structure includes a slide rail, and a frequency converter and an output filter are arranged inside the power sub-cavity. The output terminal of the frequency converter is connected to the output filter. The frequency converter and the output filter are arranged on the slide rail and can be pulled out from the power sub-cavity along the slide rail.

4. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The instrument cavity is equipped with a safety barrier signal isolator, an intrinsically safe terminal block, and a relay. The instrument cavity is connected to an external instrument via an aviation plug.

5. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, A programmable logic controller is installed inside the control cavity.

6. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, At least one first explosion-proof gland is provided on the bottom outer side of the instrument cavity, and at least one second explosion-proof gland is provided on the left side of the power cavity. The first explosion-proof gland is used to connect to the signal cable, and the second explosion-proof gland is used to connect to the power cable. The gap between the power cable and the signal cable is filled with explosion-proof sealant.

7. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, Temperature sensors are respectively installed in the power chamber, the instrument chamber, and the control chamber to detect the temperature in the power chamber, the instrument chamber, and the control chamber. When the temperature exceeds the limit, an audible and visual alarm is automatically triggered.

8. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The control chamber and the instrument chamber are each hinged with a front-opening cabinet door. The cabinet door of the control chamber is provided with a viewing window, and an explosion-proof touch screen is embedded on the outside of the viewing window.

9. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The control cavity is equipped with a wireless communication module, which enables users to remotely monitor the status of the equipment.

10. The explosion-proof secondary water supply system electrical control cabinet according to claim 1, characterized in that, The bottom of the electrical control cabinet is equipped with support legs.

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