A monitoring system for high and low voltage explosion-proof switches in underground mines

Abstract

This utility model discloses a monitoring system for underground high and low voltage explosion-proof switches, relating to the field of electrical equipment monitoring technology. It includes: a monitoring host and a signal receiving device electrically connected to the monitoring host. The signal receiving end of the signal receiving device is installed inside the cavity of the underground high and low voltage explosion-proof switch, and is wirelessly connected to a temperature sensor installed inside the cavity. This solution achieves wireless communication between the cavity and the temperature sensor. The temperature sensors installed at various monitoring locations on the high and low voltage explosion-proof switch wirelessly transmit the detected temperature to the signal receiving device, which then transmits the data to the monitoring host via a signal line. The monitoring host displays the monitoring data from each temperature sensor. Underground inspection personnel can monitor the underground high and low voltage explosion-proof switches based on the information displayed on the monitoring host. The monitoring host can also transmit the received monitoring data to the ground control center for ground monitoring via the signal line.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment monitoring technology, specifically to a monitoring system for underground high and low voltage explosion-proof switches. Background Technology

[0002] Switchgear is a key piece of equipment in a power system used for controlling, protecting, and distributing electrical energy. It integrates switching equipment (such as circuit breakers and disconnectors), measuring instruments, protection devices, and auxiliary equipment into a closed or semi-closed metal cabinet, forming a complete electrical control unit. Switchgear plays a vital role in all aspects of power distribution and consumption in enterprise production, enabling safe operation, fault isolation, and power distribution of the power system.

[0003] Monitoring the components inside switchgear is crucial for ensuring the safe and stable operation of the power system, requiring real-time temperature monitoring of key components using various technologies. Traditionally, temperature sensors are installed on key components inside the switchgear, and an external host unit equipped with a receiving antenna receives temperature information transmitted from the various temperature sensors within the switchgear.

[0004] Explosion-proof high and low voltage switches for underground mining are electrical devices specifically designed for high-risk underground environments such as coal mines. Their core functions encompass power distribution, control, and safety protection, employing multiple technical means to ensure reliable operation under extreme conditions. Because underground environments are flammable and explosive, monitoring methods used in surface switchgear are unsuitable for underground applications. Therefore, achieving temperature monitoring of underground high and low voltage explosion-proof switches during underground operations is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes the following technical solution: In a first aspect, this utility model provides a monitoring system for downhole high and low voltage explosion-proof switches, comprising: a monitoring host, a signal receiving device electrically connected to the monitoring host, wherein the signal receiving end of the signal receiving device is disposed in the cavity of the downhole high and low voltage explosion-proof switch, and the signal receiving end is wirelessly connected to a temperature sensor disposed in the cavity.

[0006] In one possible implementation, the signal receiving device includes a monitoring substation and a signal receiving mechanism disposed within the cavity. The monitoring substation is electrically connected to both the monitoring host and the signal receiving mechanism. The signal receiving mechanism is wirelessly connected to the temperature sensor. The signal receiving mechanism includes metal terminals within a high- and low-voltage explosion-proof switch, a combination of metal terminals and an antenna, and a combination of antennas.

[0007] In one possible implementation, the monitoring substation is located outside the downhole high and low voltage explosion-proof switch. The monitoring substation is connected to the wiring cavity of the downhole high and low voltage explosion-proof switch via a first signal line. A wiring terminal is provided between the wiring cavity and the main cavity. The first end of the first signal line is electrically connected to the monitoring substation, and the second end of the first signal line is connected to the first end of the first metal terminal on the wiring terminal. The second end of the first metal terminal is located on the main cavity side. The first metal terminal is wirelessly connected to the temperature sensors in the wiring cavity and the main cavity. The first metal terminal can be any metal terminal on the wiring terminal.

[0008] In one possible implementation, a first antenna and a second antenna are respectively provided at both ends of the first metal terminal. The first antenna is wirelessly connected to a temperature sensor in the wiring cavity, and the second antenna is wirelessly connected to a temperature sensor in the main cavity. The first antenna and the second antenna are electrically connected to the first signal line through the first metal terminal.

[0009] In one possible implementation, the monitoring substation is located outside the downhole high and low voltage explosion-proof switch. The monitoring substation is connected to the wiring cavity of the downhole high and low voltage explosion-proof switch via a second signal line. A wiring terminal is provided between the wiring cavity and the main cavity. The signal receiving mechanism includes a third antenna. A third antenna is provided at the point where the second signal line enters the inner wall of the wiring cavity. The first end of the second signal line is electrically connected to the monitoring substation, and the second end of the second signal line is electrically connected to the third antenna. A fourth antenna and a fifth antenna are respectively provided at both ends of the second metal terminal on the wiring terminal. The fourth antenna is wirelessly connected to a temperature sensor in the wiring cavity, and the fifth antenna is wirelessly connected to a temperature sensor in the main cavity. Both the fourth and fifth antennas are wirelessly connected to the third antenna. The second metal terminal can be any metal terminal on the wiring terminal.

[0010] In one possible implementation, the monitoring substation is located on the side wall of the main cavity of the downhole high and low voltage explosion-proof switch. A terminal block is provided between the wiring cavity of the downhole high and low voltage explosion-proof switch and the main cavity. A third signal line and a first communication line are provided between the monitoring substation and the terminal block. A second communication line is provided between the terminal block and the monitoring host. The first end of the third signal line is electrically connected to the first end of the third metal terminal on the terminal block, and the second end of the third signal line is electrically connected to the monitoring substation. A sixth antenna is provided at the second end of the third metal terminal. The first end of the first communication line is electrically connected to the signal terminal of the monitoring substation. The second end of the first communication line is electrically connected to the first ends of the fourth and fifth metal terminals on the terminal block. The second ends of the fourth and fifth metal terminals are electrically connected to the first end of the second communication line. The second end of the second communication line is electrically connected to the communication terminal of the monitoring host. The third, fourth, and fifth metal terminals are any different metal terminals on the terminal block.

[0011] In one possible implementation, the monitoring substation includes an encapsulated housing and a controller and a signal receiver disposed within the encapsulated housing. The signal receiver is electrically connected to the signal receiving terminals of the controller and each cavity of the downhole high and low voltage explosion-proof switch, respectively. The controller is communicatively connected to the monitoring host.

[0012] In one possible implementation, when the monitoring substation is located outside the downhole high and low voltage explosion-proof switch, the encapsulation housing includes: an explosion-proof housing, an intrinsically safe housing, and an explosion-proof and intrinsically safe housing, and the encapsulation housing protects the electronic components inside the monitoring substation.

[0013] In one possible implementation, when the monitoring substation is located inside the main cavity of the downhole high and low voltage explosion-proof switch, the encapsulation housing is fixedly mounted on the side wall of the main cavity.

[0014] In one possible implementation, the monitoring host is provided with a backup power supply cavity, which contains a UPS power supply used to provide emergency power to the monitoring system.

[0015] In this embodiment of the invention, the signal receiving end of the signal receiving device is installed inside the cavity of the underground high and low voltage explosion-proof switch, enabling wireless communication between the cavity and the temperature sensors. The temperature sensors located at each monitoring position of the high and low voltage explosion-proof switch wirelessly transmit the detected temperature to the signal receiving device. The signal receiving device then transmits the data to the monitoring host via a signal line, where the monitoring host displays the monitoring data from each temperature sensor. Underground inspection personnel can monitor the underground high and low voltage explosion-proof switch based on the information displayed on the monitoring host. The monitoring host can also transmit the received monitoring data to the ground control center for surface monitoring via the signal line. Attached Figure Description

[0016] Figure 1 A schematic diagram of a downhole high and low voltage explosion-proof switch monitoring system provided for an embodiment of this utility model; Figure 2 A front view of the monitoring host provided in an embodiment of this utility model; Figure 3 A schematic diagram of a downhole high and low voltage explosion-proof switch monitoring system provided for an embodiment of this utility model; Figure 4 A schematic diagram of a downhole high and low voltage explosion-proof switch monitoring system provided for an embodiment of this utility model; Figure 5 A schematic diagram of a downhole high and low voltage explosion-proof switch monitoring system provided for an embodiment of this utility model; Figure 1-5 In Chinese, the symbol is represented as: 1-Monitoring host, 2-Monitoring substation, 3-First signal line, 4-Wiring cavity, 5-Sounding nozzle, 6-Main cavity, 7-Blocking plate, 8-Wiring terminal, 9-Metal wiring post, 10-Display screen, 11-First antenna, 12-Second antenna, 13-Second signal line, 14-Third antenna, 15-Fourth antenna, 16-Fifth antenna, 17-Third signal line, 18-First communication line, 19-Second communication line, 20-Sixth antenna. Detailed Implementation

[0017] The present solution will now be described in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1: See Figure 1 The underground high and low voltage explosion-proof switch monitoring system in this embodiment includes a monitoring host 1 and a monitoring substation 2 located outside the underground high and low voltage explosion-proof switch. The monitoring host 1 and the monitoring substation 2 are connected via a signal line. The monitoring substation 2 is connected to the wiring cavity 4 of the underground high and low voltage explosion-proof switch via a first signal line 3. Specifically, the signal line can enter from the flared end 5 on the wiring cavity 4.

[0019] The underground high and low voltage explosion-proof switch is internally divided into a wiring cavity 4 and a main cavity 6. A partition 7 is provided between the wiring cavity 4 and the main cavity 6, and wiring terminals 8 are provided on the partition 7. After the first signal line 3 enters the wiring cavity 4, any metal terminal 9 on the wiring terminal 8 is selected, and the entry end of the first signal line 3 is wound around the metal terminal 9 for fixation. Since one end of the metal terminal 9 is located inside the wiring cavity 4, and the other end passes through the partition 7 between the two cavities and is located on the side of the main cavity 6, in this embodiment, the metal terminal 9 is used as the signal receiving mechanism of the signal receiving device. The metal terminal 9 is wirelessly connected to the temperature sensors in the wiring cavity 4 and the main cavity 6 to realize the reception of the temperature sensor monitoring signals, which are then transmitted to the monitoring substation 2 through the signal line, and finally sent by the monitoring substation 2 to the monitoring host 1.

[0020] See Figure 2 In this embodiment, the monitoring host 1 is equipped with a display screen 10, which displays the sensor data received from the monitoring substation 2. Of course, in this embodiment, while displaying the sensor monitoring data, the monitoring host 1 also transmits the received data to the ground control center via a signal line, achieving multi-dimensional monitoring both above and below ground.

[0021] The monitoring substation 2 in this embodiment includes an encapsulated housing and a controller and a signal receiver disposed within the housing. The signal receiver is electrically connected to the controller and a metal terminal 9 connected to a signal line, respectively. The controller is communicatively connected to the monitoring host 1. Since this is an underground environment, and the monitoring substation 2 in this embodiment is independently configured, the encapsulated housing in this embodiment includes: an explosion-proof housing, an intrinsically safe housing, and an explosion-proof and intrinsically safe housing. The encapsulated housing is used to protect the electronic components inside the monitoring substation 2. This embodiment does not specifically limit the type of encapsulated housing used.

[0022] In this embodiment, the signal cable uses a cable that meets downhole safety requirements, such as a polyethylene insulated, PVC sheathed cable. The polyethylene insulation layer is hydrolysis resistant and has stable electrical performance, while the PVC sheath is corrosion resistant and flame retardant. It is suitable for general downhole communication, signal transmission, and sensor data transmission. An intrinsically safe explosion-proof cable is also used; this cable limits the energy of electrical sparks and meets explosion-proof standards. Both of the above are illustrative examples, and no specific limitations are made on the type and specifications of the signal cable.

[0023] In this embodiment, in order to prevent the underground high and low voltage explosion-proof switch monitoring system from malfunctioning, the monitoring host 1 is equipped with a backup power supply cavity, which contains a UPS power supply. The UPS power supply is used to provide emergency power to the high and low voltage explosion-proof switch monitoring system.

[0024] Example 2: See Figure 3 Similar to Embodiment 1, the monitoring substation 2 in this embodiment is also located outside the high and low voltage explosion-proof switch underground. The difference is that in this embodiment, a first antenna 11 and a second antenna 12 are respectively installed at both ends of the metal terminal 9 connecting the first signal line 3. The first antenna 11 is wirelessly connected to the temperature sensor inside the wiring cavity 4, and the second antenna 12 is wirelessly connected to the temperature sensor inside the main cavity 6. The metal terminal 9 of the first antenna 11 and the second antenna 12 is electrically connected to the first signal line 3.

[0025] The signal receiving device in this embodiment includes a metal terminal block 9 and a first antenna 11 and a second antenna 12 disposed at both ends. The antenna has higher radiation efficiency and higher directivity than the metal terminal block 9. Compared with using the metal terminal block 9 alone, the communication between the antenna and the temperature sensor is more stable and more reliable.

[0026] Example 3: See Figure 4 Similar to Embodiments 1 and 2, the monitoring substation 2 in this embodiment is also located outside the high and low voltage explosion-proof switch underground. Unlike the two embodiments described above, this embodiment uses a second signal line 13 that is shorter than the first signal line 3 in the previous embodiments. In this embodiment, the first end of the second signal line 13 is electrically connected to the monitoring substation 2, and the second end is connected to the wiring cavity 4 of the high and low voltage explosion-proof switch.

[0027] In this embodiment, the second end of the second signal line 13 is no longer connected to the metal terminal 9 of the terminal block 8. Instead, a third antenna 14 is provided at the point where the second signal line 13 is introduced into the inner wall of the wiring cavity 4, and the second end of the second signal line 13 is electrically connected to the third antenna 14. Then, a metal terminal 9 is selected from the terminal block 8, and a fourth antenna 15 and a fifth antenna 16 are respectively provided at both ends of the metal terminal 9. This enables the fourth antenna 15 to be wirelessly connected to the temperature sensor in the wiring cavity 4, and the fifth antenna 16 to be wirelessly connected to the temperature sensor in the main cavity 6. Then, both the fourth antenna 15 and the fifth antenna 16 are wirelessly connected to the third antenna 14.

[0028] In this embodiment, the third antenna 14, the fourth antenna 15, and the fifth antenna 16 of the signal receiving device employ wireless data communication without signal lines within the underground high and low voltage explosion-proof switch cavity. Furthermore, the use of three antennas within the confined space of the cavity ensures the stability and reliability of the temperature sensor monitoring data transmission.

[0029] Example 4: See Figure 5Unlike the embodiments described above, in this embodiment, the monitoring substation 2 is located on the side wall of the main cavity 6 of the downhole high and low voltage explosion-proof switch. In this embodiment, a third signal line 17 and a first communication line 18 are provided between the monitoring substation 2 and the terminal block 8, and a second communication line 19 is provided between the terminal block 8 and the monitoring host 1. The first end of the third signal line 17 is electrically connected to the first end of the third metal terminal on the terminal block 8, and the second end of the third signal line 17 is electrically connected to the monitoring substation 2. A sixth antenna 20 is provided at the second end of the third metal terminal. The first end of the first communication line 18 is electrically connected to the signal terminal of the monitoring substation 2, and the second end of the first communication line 18 is electrically connected to the first ends of the fourth and fifth metal terminals on the terminal block 8. The second ends of the fourth and fifth metal terminals are electrically connected to the first end of the second communication line 19, and the second end of the second communication line 19 is electrically connected to the communication terminal of the monitoring host 1. The third, fourth, and fifth metal terminals can be any different metal terminals on the terminal block.

[0030] It should be noted that the first communication line 18 and the second communication line 19 in this embodiment both contain two wire cores. Therefore, when passing through the terminal block 8, two metal terminals need to be occupied, namely the fourth metal terminal and the fifth metal terminal in this embodiment.

[0031] In this embodiment, the detection substation is set inside the main cavity 6 of the underground high and low voltage explosion-proof switch. Since the cavity of the underground high and low voltage explosion-proof switch is explosion-proof and of the same type, the outer shell of the monitoring substation 2 in this embodiment does not need to be an explosion-proof shell, an intrinsically safe shell, or an explosion-proof and intrinsically safe shell.

[0032] In this embodiment, the third metal terminal and the sixth antenna are used as the signal receiving mechanism of the signal receiving device. The sixth antenna is wirelessly connected to the temperature sensor in the wiring cavity 4, and the end of the third metal terminal set on one side of the main cavity 6 is wirelessly connected to the temperature sensor in the main cavity 6, so as to realize the reception of the temperature sensor monitoring signal, and then transmit it to the monitoring substation 2 through the signal line.

[0033] It should be noted that Embodiments 2 to 4 in this utility model specification mainly describe the improvements. For other structural related contents, please refer to the contents of Embodiment 1, and they will not be repeated here.

[0034] As can be seen from the above embodiments, this utility model embodiment sets the signal receiving end of the signal receiving device inside the cavity of the underground high and low voltage explosion-proof switch, realizing wireless communication between the cavity and the temperature sensor. The temperature sensors installed at each monitoring position of the high and low voltage explosion-proof switch wirelessly transmit the detected temperature to the signal receiving device, which then transmits the data to the monitoring host via a signal line. The monitoring host displays the monitoring data from each temperature sensor. Underground inspection personnel can monitor the underground high and low voltage explosion-proof switch based on the information displayed on the monitoring host. The monitoring host can also transmit the received monitoring data to the ground control center for ground monitoring via a signal line.

[0035] In this embodiment of the invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying 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, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The above description is merely a specific embodiment of this utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A downhole high and low voltage explosion-proof switch monitoring system, characterized in that, include: The monitoring host and the signal receiving device electrically connected to the monitoring host are provided. The signal receiving end of the signal receiving device is located inside the cavity of the downhole high and low voltage explosion-proof switch, and the signal receiving end is wirelessly connected to the temperature sensor located inside the cavity.

2. The downhole high and low voltage explosion-proof switch monitoring system of claim 1, wherein, The signal receiving device includes a monitoring substation and a signal receiving mechanism disposed in the cavity. The monitoring substation is electrically connected to the monitoring host and the signal receiving mechanism respectively. The signal receiving mechanism is wirelessly connected to the temperature sensor. The signal receiving mechanism includes metal terminals inside a high and low voltage explosion-proof switch, a combination of metal terminals and an antenna, and a combination of antennas.

3. The downhole high and low voltage explosion-proof switch monitoring system of claim 2, wherein, The monitoring substation is located outside the downhole high and low voltage explosion-proof switch. The monitoring substation is connected to the wiring cavity of the downhole high and low voltage explosion-proof switch via a first signal line. A wiring terminal is provided between the wiring cavity and the main cavity. The first end of the first signal line is electrically connected to the monitoring substation, and the second end of the first signal line is connected to the first end of the first metal terminal on the wiring terminal. The second end of the first metal terminal is located on the main cavity side. The first metal terminal is wirelessly connected to the temperature sensor in the wiring cavity and the main cavity. The first metal terminal can be any metal terminal on the wiring terminal.

4. The downhole high and low voltage explosion-proof switch monitoring system of claim 3, wherein, A first antenna and a second antenna are respectively provided at both ends of the first metal terminal. The first antenna is wirelessly connected to the temperature sensor in the wiring cavity, and the second antenna is wirelessly connected to the temperature sensor in the main cavity. The first antenna and the second antenna are electrically connected to the first signal line through the first metal terminal.

5. The downhole high and low voltage explosion-proof switch monitoring system of claim 2, wherein, The monitoring substation is located outside the downhole high and low voltage explosion-proof switch. The monitoring substation is connected to the wiring cavity of the downhole high and low voltage explosion-proof switch via a second signal line. A wiring terminal is provided between the wiring cavity and the main cavity. A third antenna is provided at the point where the second signal line enters the inner wall of the wiring cavity. The first end of the second signal line is electrically connected to the monitoring substation, and the second end of the second signal line is electrically connected to the third antenna. A fourth antenna and a fifth antenna are respectively provided at both ends of the second metal terminal on the wiring terminal. The fourth antenna is wirelessly connected to the temperature sensor in the wiring cavity, and the fifth antenna is wirelessly connected to the temperature sensor in the main cavity. Both the fourth and fifth antennas are wirelessly connected to the third antenna. The second metal terminal can be any metal terminal on the wiring terminal.

6. The downhole high and low voltage explosion-proof switch monitoring system of claim 2, wherein, The monitoring substation is installed on the side wall of the main cavity of the downhole high and low voltage explosion-proof switch. A terminal block is provided between the wiring cavity of the downhole high and low voltage explosion-proof switch and the main cavity. A third signal line and a first communication line are provided between the monitoring substation and the terminal block. A second communication line is provided between the terminal block and the monitoring host. The first end of the third signal line is electrically connected to the first end of the third metal terminal on the terminal block, and the second end of the third signal line is electrically connected to the monitoring substation. A sixth antenna is provided at the second end of the third metal terminal. The first end of the first communication line is electrically connected to the signal terminal of the monitoring substation. The second end of the first communication line is electrically connected to the first ends of the fourth and fifth metal terminals on the terminal block. The second ends of the fourth and fifth metal terminals are electrically connected to the first end of the second communication line. The second end of the second communication line is electrically connected to the communication terminal of the monitoring host. The third, fourth, and fifth metal terminals are any different metal terminals on the terminal block.

7. The downhole high and low voltage explosion-proof switch monitoring system according to any of claims 2-6, characterized in that, The monitoring substation includes a housing and a controller and a signal receiver disposed within the housing. The signal receiver is electrically connected to the signal receiving terminals in the controller and the various chambers of the downhole high and low voltage explosion-proof switch. The controller is communicatively connected to the monitoring host.

8. The downhole high and low voltage explosion-proof switch monitoring system according to claim 7, characterized in that, When the monitoring substation is located outside the underground high and low voltage explosion-proof switch, the encapsulation housing includes: an explosion-proof housing, an intrinsically safe housing, and an explosion-proof and intrinsically safe housing. The encapsulation housing protects the electronic components inside the monitoring substation.

9. The downhole high and low voltage explosion-proof switch monitoring system of claim 7, wherein, When the monitoring substation is installed inside the main cavity of the downhole high and low voltage explosion-proof switch, the encapsulation housing is fixedly installed on the side wall of the main cavity.

10. The downhole high and low voltage explosion-proof switch monitoring system of claim 1, wherein, The monitoring host is equipped with a backup power supply compartment, which contains a UPS power supply used to provide emergency power to the monitoring system.

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