Ventilation and monitoring system of high-voltage control cabinet and high-voltage control cabinet

Abstract

The utility model relates to a ventilation and monitoring system of a high-voltage control cabinet and the high-voltage control cabinet, and the system comprises a wireless temperature measuring device which comprises a wireless transmitter and a plurality of temperature measuring sensors, the temperature measuring sensors are connected with the wireless transmitter, and the plurality of temperature measuring sensors are respectively arranged on a plurality of contact arms of a circuit breaker of the high-voltage control cabinet; the wireless temperature measurement receiver comprises a wireless receiver, a controller and a display screen, the wireless receiver is in communication connection with the wireless transmitter, and the wireless receiver and the display screen are connected to the controller; and an outlet of the cooling device is connected to a circuit breaker chamber of the high-voltage control cabinet, and a control end of the cooling device is connected to the wireless temperature measurement receiver. When the temperature of the contact arm on the circuit breaker reaches a threshold value, the circuit breaker chamber of the high-voltage control cabinet is cooled, and the situation that the temperature of the contact arm of the circuit breaker rises, a contact arm spring fails, and safe operation of a system is affected is avoided.

Description

Technical Field

[0001] This application relates to the technical field of high-voltage control cabinets, and particularly relates to a ventilation and monitoring system for a high-voltage control cabinet and a high-voltage control cabinet. Background Art

[0002] A high-voltage control cabinet, also known as a high-voltage switch cabinet, after being energized, it is impossible to detect the temperature inside the switch cabinet through normal means, especially the temperature of the contact arms of the circuit breaker. Therefore, once the contact arms of the circuit breaker overheat severely, accidents will surely occur. Since the high-voltage switch cabinet is a sealed cabinet, the heat inside the switch cabinet cannot be naturally dissipated. After long-term operation, the temperature inside the switch cabinet is too high, and the internal high-temperature environment will reduce the insulation performance of the insulating material and cause the contact arm springs to fail, etc., affecting the safe operation of the system. Our factory has repeatedly experienced accidents where electrical failures caused by overheating of the contact arms of the circuit breaker affected production. Utility Model Content

[0003] In view of the above problems, this application provides a ventilation and monitoring system for a high-voltage control cabinet and a high-voltage control cabinet, which solves the problem that the contact arm springs of the circuit breaker are likely to fail due to the too high temperature inside the high-voltage control cabinet, thus affecting the safe operation of the system.

[0004] To achieve the above object, the inventor provides a ventilation and monitoring system for a high-voltage control cabinet, including:

[0005] A wireless temperature measurement device, including a wireless transmitter and a plurality of temperature sensors, the temperature sensors are connected to the wireless transmitter, and the plurality of temperature sensors are respectively arranged on a plurality of contact arms of the circuit breaker of the high-voltage control cabinet;

[0006] A wireless temperature measurement receiver, the wireless temperature measurement receiver includes a wireless receiver, a controller and a display screen, the wireless receiver is communicatively connected to the wireless transmitter, and the wireless receiver and the display screen are connected to the controller;

[0007] A cooling device, the outlet of the cooling device is connected to the circuit breaker chamber of the high-voltage control cabinet, and the control end of the cooling device is connected to the wireless temperature measurement receiver.

[0008] In some embodiments, there are a plurality of wireless transmitters, and the plurality of wireless transmitters correspond to the plurality of temperature sensors one by one, and the temperature sensors are connected to the corresponding wireless transmitters.

[0009] In some embodiments, the wireless temperature measurement receiver further includes a high-temperature alarm, and the high-temperature alarm is connected to the controller.

[0010] In some embodiments, the cooling device includes a high-temperature alarm contact, a cross-flow cooling fan and an intermediate relay,

[0011] One end of the normally open contact of the intermediate relay is connected to the working power supply, and the other end of the normally open contact of the intermediate relay is connected to the cross-flow cooling fan;

[0012] The coil of the intermediate relay is connected to the working power supply through a high-temperature alarm contact;

[0013] The control end of the high-temperature alarm contact is connected to the controller of the wireless temperature measurement receiver.

[0014] In some embodiments, a changeover switch is further included. One end of the changeover switch is connected to the working power supply, and the other end of the changeover switch is connected to the cross-flow cooling fan.

[0015] In some embodiments, a control switch is further included;

[0016] The cooling device is connected to the working power supply through the control switch.

[0017] In some embodiments, both the wireless transmitter and the wireless receiver are NB-IoT wireless communication modules.

[0018] Another technical solution is also provided. A high-voltage control cabinet includes:

[0019] A ventilation and monitoring system, and the ventilation and monitoring system is the ventilation and monitoring system of the above-mentioned high-voltage control cabinet;

[0020] A cabinet body, which includes a cabinet door, a circuit breaker chamber, a cooling channel, an empty chamber and a ventilation opening;

[0021] The empty chamber is arranged below the cabinet body, and a cooling device is arranged in the empty chamber;

[0022] One end of the cooling channel is connected to the air outlet of the cooling device, and the other end of the cooling channel is connected to the circuit breaker chamber;

[0023] The ventilation opening is arranged on the top of the cabinet body, and the ventilation opening is connected to the circuit breaker chamber.

[0024] Different from the prior art, in the above technical solution, a temperature measuring sensor is arranged on the contact arm of the circuit breaker in the high-voltage control cabinet. The temperature of each contact arm of the circuit breaker in the high-voltage control cabinet is detected by the temperature measuring sensor, and then the temperature detected by each temperature measuring sensor is sent to the wireless temperature measuring receiving device through a wireless transmitter. After the wireless receiver of the wireless temperature measuring receiver receives the measured temperature sent by the wireless transmitter, the controller displays the temperature of each contact arm on the display screen. When the temperature of the contact arm on the circuit breaker reaches the threshold value, the controller controls the cooling device to work to cool the circuit breaker chamber in the high-voltage control cabinet, so that the temperature of the contact arm of the circuit breaker is reduced, avoiding the increase of the temperature of the contact arm of the circuit breaker, which may cause the contact arm spring to fail and affect the safe operation of the system.

[0025] The above description of the utility model content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then be able to implement it according to the content recorded in the description and the accompanying drawings, and in order to make the above objects, other objects, features and advantages of this application more easily understood, the following description is made in conjunction with the specific implementation manners and accompanying drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are only used to illustrate the principles, implementation methods, applications, features and effects of the specific implementation manners and other related contents of this application, and should not be considered as a limitation to this application.

[0027] In the accompanying drawings of the specification:

[0028] Figure 1 FIG. is a schematic structural diagram of a ventilation and monitoring system of a high-voltage control cabinet described in the specific implementation manner;

[0029] Figure 2 FIG. is a schematic structural diagram of a wireless temperature measuring device described in the specific implementation manner;

[0030] Figure 3 FIG. is a schematic structural diagram of a cooling device described in the specific implementation manner;

[0031] Figure 4 FIG. is another schematic structural diagram of a cooling device described in the specific implementation manner;

[0032] Figure 5 FIG. is another schematic structural diagram of a cooling device described in the specific implementation manner.

[0033] The reference numerals involved in the above-mentioned drawings are explained as follows:

[0034] 110, wireless temperature measuring device,

[0035] 111, temperature measuring sensor,

[0036] 112. Wireless transmitter

[0037] 120. Wireless temperature measurement receiver

[0038] 121. Wireless receiver

[0039] 122. Controller

[0040] 123. Display screen

[0041] 130. Cooling device Detailed implementation manners

[0042] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, the following is a detailed description in conjunction with the listed specific embodiments and with reference to the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0043] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of this application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0044] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0045] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0046] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or order relationship between these entities or operations.

[0047] Without further limitations, in this application, the terms "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product that includes the described elements. Thus, a process, method or product that includes a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method or product.

[0048] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in this way unless otherwise specifically defined.

[0049] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the specific embodiment or the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of this application.

[0050] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "coupled", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0051] Please refer to Figure 1 , this embodiment provides a ventilation and monitoring system for a high-voltage control cabinet, including:

[0052] The wireless temperature measurement device 110 includes a wireless transmitter 112 and a plurality of temperature sensors 111. The temperature sensors 111 are connected to the wireless transmitter 112, and the plurality of temperature sensors 111 are respectively arranged on several contact arms of the circuit breaker of the high-voltage control cabinet;

[0053] The wireless temperature measurement receiver 120 includes a wireless receiver 121, a controller 122 and a display screen 123. The wireless receiver 121 is communicatively connected to the wireless transmitter 112, and the wireless receiver 121 and the display screen 123 are connected to the controller 122;

[0054] The cooling device 130, the outlet of the cooling device 130 is connected to the circuit breaker chamber of the high-voltage control cabinet, and the control end of the cooling device 130 is connected to the wireless temperature measurement receiver 120.

[0055] By arranging the temperature sensors 111 on the contact arms of the circuit breaker of the high-voltage control cabinet, detecting the temperature of each contact arm of the circuit breaker of the high-voltage control cabinet through the temperature sensors 111, and then sending the temperatures detected by each temperature sensor 111 to the wireless temperature measurement receiving device through the wireless transmitter 112. After the wireless receiver 121 of the wireless temperature measurement receiver 120 receives the measured temperature sent by the wireless transmitter 112, the controller 122 displays the temperatures of each contact arm on the display screen 123. When the temperature of the contact arm on the circuit breaker reaches the threshold value, the controller 122 controls the cooling device 130 to work, cools the circuit breaker chamber of the high-voltage control cabinet, so that the temperature of the contact arm of the circuit breaker is reduced, and the temperature rise of the contact arm of the circuit breaker is avoided, which may cause the contact arm spring to fail and affect the safe operation of the system.

[0056] As Figure 2 shown, in some embodiments, there are a plurality of wireless transmitters 112, and the plurality of wireless transmitters 112 correspond to the plurality of temperature sensors 111 one by one, and the temperature sensors 111 are connected to the corresponding wireless transmitters 112.

[0057] The wireless transmitter 112 can be configured correspondingly through each temperature measurement sensor 111. For example, if there are 6 temperature measurement sensors 111, namely temperature measurement sensor A, temperature measurement sensor B, temperature measurement sensor C, temperature measurement sensor D, temperature measurement sensor E, and temperature measurement sensor F, then there are 6 corresponding wireless transmitters 112, namely wireless transmitter a, wireless transmitter b, wireless transmitter c, wireless transmitter d, wireless transmitter e, and wireless transmitter f. The temperature measurement sensor A corresponds to the wireless transmitter a, and the temperature collected by the temperature measurement sensor A is sent to the wireless temperature measurement receiver by the wireless transmitter a. Correspondingly, the temperature measurement sensor B corresponds to the wireless transmitter b, the temperature measurement sensor C corresponds to the wireless transmitter c, the temperature measurement sensor D corresponds to the wireless transmitter d, the temperature measurement sensor E corresponds to the wireless transmitter e, and the temperature measurement sensor F corresponds to the wireless transmitter f. In other embodiments, a single wireless transmitter can also be configured, and the temperatures collected by several temperature measurement sensors are all sent to the wireless temperature measurement receiver by the same wireless transmitter.

[0058] In some embodiments, the wireless temperature measurement receiver 120 further includes a high-temperature alarm, and the high-temperature alarm is connected to the controller 122. When the temperature of the contact arm of the circuit breaker is higher than the threshold, the controller 122 of the wireless temperature measurement receiver 120 controls the high-temperature alarm to give an alarm, reminding the staff that the temperature of the contact arm of the circuit breaker in the high-voltage control cabinet is too high, and corresponding measures should be taken immediately.

[0059] Please refer to Figure 3 , in some embodiments, the cooling device 130 includes a high-temperature alarm contact, a cross-flow cooling fan, and an intermediate relay.

[0060] One end of the normally open contact of the intermediate relay is connected to the working power supply, and the other end of the normally open contact of the intermediate relay is connected to the cross-flow cooling fan.

[0061] The coil of the intermediate relay is connected to the working power supply through the high-temperature alarm contact.

[0062] The control end of the high-temperature alarm contact is connected to the controller 122 of the wireless temperature measurement receiver 120.

[0063] When the temperature of the contact arm of the circuit breaker reaches the threshold, the controller 122 of the wireless temperature measurement receiver 120 controls the high-voltage alarm contact to close, so that the coil of the intermediate relay is energized, and then the normally open contact of the intermediate relay closes, causing the cross-flow cooling fan to work and output cold air to the circuit breaker chamber to cool the contact arm of the circuit breaker in the circuit breaker chamber.

[0064] Please refer to Figure 4, in some embodiments, it further includes a changeover switch, one end of the changeover switch is connected to the working power supply, and the other end of the changeover switch is connected to the cross-flow cooling fan.

[0065] By providing a changeover switch between the cross-flow cooling fan and the working power supply, the cross-flow cooling fan can also be made to work by manually closing the changeover switch, realizing the manual control of the cross-flow cooling fan.

[0066] Please refer to Figure 5 , in some embodiments, it further includes a control switch;

[0067] The cooling device 130 is connected to the working power supply through the control switch.

[0068] By providing a control switch between the cooling device 130 and the working power supply, the operation of the cooling device 130 can be controlled through the control switch.

[0069] In some embodiments, both the wireless transmitter 112 and the wireless receiver 121 are NB-IoT wireless communication modules. NB-IoT (Narrow Band Internet of Things) is an important branch of the Internet of Everything. NB-IoT is built on the cellular network, only consuming about 180 kHz of bandwidth, and can be directly deployed on the GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades. NB-IoT is an emerging technology in the IoT field, supporting the cellular data connection of low-power devices in the wide area network, and is also called Low Power Wide Area Network (LPWAN). NB-IoT supports the efficient connection of devices with long standby time and high requirements for network connection. The battery life of NB-IoT devices can be increased by at least 10 years, and at the same time, it can also provide very comprehensive indoor cellular data connection coverage. In other embodiments, the wireless transmitter 112 and the wireless receiver 121 can also adopt Bluetooth communication modules, ZigBee communication modules, etc.

[0070] By adding a wireless temperature measurement device 110 to the switchgear, temperature measurement sensors 111 are installed on 6 contact arms of the circuit breaker, and the wireless temperature measurement receiver 120 is installed on the door of the relay instrument room of the switchgear. The wireless temperature measurement receiver 120 has functions such as screen display, high-temperature alarm, high-temperature alarm output, and 485 communication.

[0071] Install a cross-flow cooling fan in the empty room below the high-voltage switchgear. The outlet of the cooling fan is aligned with the heat dissipation channel inside the switchgear. When the cross-flow cooling fan operates, it blows the cooling air into the circuit breaker room, and discharges the heat in the circuit breaker room to the outside of the cabinet top through the ventilation opening on the cabinet top.

[0072] Utilize the high-temperature alarm output function of the wireless temperature measurement receiver 120 to design an automatic ventilation system inside the cabinet, so that when the temperature inside the cabinet rises to the set value, the cross-flow cooling fan starts, reducing the temperature of the breaker compartment inside the cabinet and preventing the excessively high temperature from affecting the operation of the breaker.

[0073] After adding the wireless temperature measurement device 110, the temperature of the breaker compartment inside the switch cabinet can be monitored during operation.

[0074] After installing the cross-flow cooling fan, the operating temperature of the breaker compartment inside the cabinet can be controlled within 45°C, ensuring the long-term safe operation of the breaker.

[0075] In another embodiment, a high-voltage control cabinet includes:

[0076] A ventilation and monitoring system, which is the ventilation and monitoring system of the above-mentioned high-voltage control cabinet;

[0077] A cabinet body, which includes a cabinet door, a breaker compartment, a cooling channel, an empty chamber and a ventilation opening;

[0078] The empty chamber is arranged below the cabinet body, and a cooling device 130 is arranged inside the empty chamber;

[0079] One end of the cooling channel is connected to the air outlet of the cooling device 130, and the other end of the cooling channel is connected to the breaker compartment;

[0080] The ventilation opening is arranged on the top of the cabinet body, and the ventilation opening is connected to the breaker compartment.

[0081] By setting a temperature measurement sensor 111 on the contact arm of the breaker in the high-voltage control cabinet, detecting the temperature of each contact arm of the breaker in the high-voltage control cabinet through the temperature measurement sensor 111, and then sending the temperature detected by each temperature measurement sensor 111 to the wireless temperature measurement receiving device through the wireless transmitter 112. After the wireless receiver 121 of the wireless temperature measurement receiver 120 receives the measured temperature sent by the wireless transmitter 112, the controller 122 displays the temperature of each contact arm on the display screen 123. When the temperature of the contact arm on the breaker reaches the threshold value, the controller 122 controls the cooling device 130 to work, cooling the breaker compartment in the high-voltage control cabinet, reducing the temperature of the contact arm of the breaker, and preventing the temperature of the contact arm of the breaker from rising, which may cause the contact arm spring to fail and affect the safe operation of the system.

[0082] By adding a wireless temperature measurement device 110 to the switch cabinet, installing temperature measurement sensors 111 on 6 contact arms of the breaker, and installing the wireless temperature measurement receiver 120 on the door of the relay instrument room in the switch cabinet, the wireless temperature measurement receiver 120 has functions such as screen display, high-temperature alarm, high-temperature alarm output, and 485 communication.

[0083] Install a cross-flow cooling fan in the empty space below the high-voltage switchgear cabinet. The outlet of the cross-flow cooling fan is aligned with the heat dissipation channel inside the switchgear cabinet. When the cross-flow cooling fan operates, it blows cooling air into the circuit breaker chamber and discharges the heat in the circuit breaker chamber out of the top of the cabinet through the ventilation opening at the top of the cabinet.

[0084] Utilize the high-temperature alarm output function of the wireless temperature measurement receiver 120 to design an automatic ventilation system inside the cabinet, so that when the temperature inside the cabinet rises to the set value, the cross-flow cooling fan starts, reducing the temperature of the circuit breaker chamber inside the cabinet and avoiding the situation that the too high temperature affects the operation of the circuit breaker.

[0085] After adding the wireless temperature measurement device 110, the temperature of the circuit breaker chamber inside the switchgear cabinet can be monitored during operation.

[0086] After installing the cross-flow cooling fan, the operating temperature of the circuit breaker chamber inside the cabinet can be controlled within 45°C, ensuring the long-term safe operation of the circuit breaker.

[0087] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of this application, using the content recorded in the text and drawings of the specification of this application, and any technical solutions directly or indirectly implementing the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. A ventilation and monitoring system for a high-voltage control cabinet, characterized in that, Comprising: A wireless temperature measurement device, including a wireless transmitter and a plurality of temperature sensors, the temperature sensors being connected to the wireless transmitter, and the plurality of temperature sensors being respectively arranged on a plurality of contact arms of a circuit breaker of a high-voltage control cabinet; A wireless temperature measurement receiver, the wireless temperature measurement receiver including a wireless receiver, a controller and a display screen, the wireless receiver being communicatively connected to the wireless transmitter, and the wireless receiver and the display screen being connected to the controller; A cooling device, an outlet of the cooling device being connected to a circuit breaker chamber of the high-voltage control cabinet, and a control end of the cooling device being connected to the wireless temperature measurement receiver.

2. The ventilation and monitoring system of the high-voltage control cabinet according to claim 1, wherein There are a plurality of the wireless transmitters, and the plurality of wireless transmitters correspond to the plurality of temperature sensors one by one, and the temperature sensors are connected to the corresponding wireless transmitters.

3. The ventilation and monitoring system of the high-voltage control cabinet according to claim 1, characterized in that The wireless temperature measurement receiver further includes a high-temperature alarm, and the high-temperature alarm is connected to the controller.

4. The ventilation and monitoring system of the high-voltage control cabinet according to claim 1, characterized in that, The cooling device includes a high-temperature alarm contact, a cross-flow cooling fan and a relay; One end of a normally open contact of the relay is connected to a working power supply, and the other end of the normally open contact of the relay is connected to the cross-flow cooling fan; A coil of the relay is connected to the working power supply through the high-temperature alarm contact; A control end of the high-temperature alarm contact is connected to the controller of the wireless temperature measurement receiver.

5. The ventilation and monitoring system of the high-voltage control cabinet according to claim 4, characterized in that, It further includes a change-over switch, one end of the change-over switch being connected to the working power supply, and the other end of the change-over switch being connected to the cross-flow cooling fan.

6. The ventilation and monitoring system of the high-voltage control cabinet according to claim 1, characterized in that, It further includes a control switch; The cooling device is connected to the working power supply through the control switch.

7. The ventilation and monitoring system of the high-voltage control cabinet according to claim 1, characterized in that, Both the wireless transmitter and the wireless receiver are NB-IoT wireless communication modules.

8. A high-voltage control cabinet, characterized in that, Comprising: A ventilation and monitoring system, the ventilation and monitoring system being the ventilation and monitoring system of the high-voltage control cabinet according to any one of claims 1-7; A cabinet body, the cabinet body including a cabinet door, a circuit breaker chamber, a cooling channel, an empty chamber and a ventilation opening; The empty chamber is arranged below the cabinet body, and the cooling device is arranged in the empty chamber; One end of the cooling channel is connected to an air outlet of the cooling device, and the other end of the cooling channel is connected to the circuit breaker chamber; The ventilation opening is arranged on the top of the cabinet body, and the ventilation opening is connected to the circuit breaker chamber.

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