Plugging system for wire inlet and outlet holes of distribution box

Abstract

The invention discloses a plugging system for wire inlet and outlet holes of a distribution box. The plugging system comprises a plugging main body and a steel wire spring fixing device, the plugging main body is of a hollow conical duplex structure and is made of a PVC (Polyvinyl Chloride) flame-retardant material; a plurality of layers of protruding anti-skid skirts are arranged on the curved outer surface of the plugging body, and a through reserved hole extending in the axis direction of a cone is formed in the center area. The steel wire spring fixing device penetrates through the preformed hole in parallel, and the two ends of the steel wire spring fixing device are fixed to the inner plane cutting faces of the two semi-cones of the plugging body respectively. When the wire inlet and outlet hole of the distribution box is plugged, a cable in the distribution box penetrates out of the reserved hole, and the anti-skid skirt of the small-diameter face of the plugging body is fixed to the edge of the hole opening of the wire inlet and outlet hole in the outer wall of the distribution box and surrounds the periphery of the wire inlet and outlet hole. The steel wire spring fixing device enables the cable to be attached to the hole wall of the reserved hole in the plugging body and enables the cutting faces of the inner planes of the two semi-cones of the plugging body to be attached. According to the invention, safe operation of electrical equipment in the distribution box can be effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment design, and particularly relates to a plugging system for the inlet and outlet holes of a distribution box. Background Art

[0002] In recent years, it has often happened that grounding problems and short - circuit problems are caused by small animals such as mice entering the distribution switch box and touching the live equipment. Currently, the main methods for preventing mice in distribution boxes are as follows: (1) Anti - mouse baffle: Install a baffle in the distribution box to isolate mice. However, this method has relatively strict requirements, has high requirements for the shape of the baffle, and the sealing condition of the baffle is average; (2) Anti - mouse mud: Anti - mouse mud is relatively easy to weather, and its shelf life is limited.

[0003] However, the above methods all have limitations: (1) Traditional anti - mouse baffles are not suitable for distribution boxes. The anti - mouse baffle is usually composed of a middle baffle, two side slots, and four expansion nails, with a height of about 50 cm. The baffle is made of high - strength aluminum alloy customized as a whole, and a reflective strip professionally made of engineering - grade reflective film is pasted on the upper part of the baffle. It is a special thin steel plate or plastic plate set to prevent mice from scurrying. A distribution box is a low - voltage power distribution device that assembles switch equipment, measuring instruments, protective electrical appliances, and auxiliary equipment in a closed or semi - closed metal cabinet or on a screen according to electrical wiring requirements. The general size specification of a distribution box is 60×80 cm. Due to its small volume and limited space, it is not suitable to install a relatively large anti - mouse baffle in the distribution box; (2) Anti - mouse mud is easy to weather: Anti - mouse mud is a mud - like substance with a relatively large strength after solidification, used to prevent mice from digging. It has strong adhesiveness and good plasticity, can effectively prevent small animals such as mice from biting, and at the same time, it has good fire - resistance and fire - blocking performance, and is mainly used for plugging holes of wires and cables to prevent the spread of fire from the holes to adjacent rooms due to wire and cable fires. However, due to the limitations of its own materials, anti - mouse mud is extremely easy to weather, and it is easily affected by the external environment and fails due to weathering when used at the inlet and outlet of the distribution box, so this material cannot be used for a long time. Summary of the Invention

[0004] The present invention provides a plugging system for the inlet and outlet holes of a distribution box to solve the technical problems that traditional anti - mouse baffles are relatively large in size and not suitable for installation in distribution boxes, and anti - mouse mud is extremely easy to weather, is easily affected by the external environment and fails due to weathering, and cannot be used for a long time.

[0005] To solve the above - mentioned technical problems, an embodiment of the present invention provides a plugging system for the inlet and outlet holes of a distribution box, including: a plugging main body and a steel wire spring fixing device;

[0006] The plugging main body is a hollow conical double - joint structure; the plugging main body is made of PVC flame - retardant material;

[0007] The curved outer surface of the plugging body is provided with several layers of protruding anti-slip skirts, and a through reserved hole extending along the axis direction of the cone is arranged in the central area of the plugging body;

[0008] The steel wire spring fixing device passes through the reserved hole in parallel, and the two ends are respectively fixed on the inner plane cutting surfaces of the two semi-cones of the plugging body;

[0009] When plugging the inlet and outlet holes of the distribution box, the cable in the distribution box passes through the reserved hole, and the anti-slip skirt on the small-diameter surface of the plugging body is fixed at the orifice edge of the inlet and outlet hole on the outer wall of the distribution box and surrounds the periphery of the inlet and outlet hole;

[0010] The steel wire spring fixing device applies pressure to the two semi-cones of the plugging body, so that the cable is in contact with the hole wall of the reserved hole in the plugging body, and the inner plane cutting surfaces of the two semi-cones of the plugging body are in contact.

[0011] As a preferred solution, the reserved hole includes: a single-wire conductor hole, a two-wire conductor hole or a four-wire conductor hole.

[0012] As a preferred solution, when the reserved hole is a two-wire conductor hole or a four-wire conductor hole, the plugging system for the inlet and outlet holes of the distribution box further includes: a conductor spacer;

[0013] The conductor spacer is located between the incoming and outgoing cables in the reserved hole;

[0014] The conductor spacer is used to separate different cables and keep the cables in fixed positions in the reserved hole.

[0015] As a preferred solution, the plugging system for the inlet and outlet holes of the distribution box further includes: an infrared sensor and a host computer;

[0016] The infrared sensor is arranged at a position in the plugging body close to the inlet and outlet holes of the distribution box;

[0017] The infrared sensor is used to collect the infrared signal at the inlet and outlet holes of the distribution box and transmit the infrared signal to the host computer;

[0018] The host computer is used to judge whether there is a living being passing by at the inlet and outlet holes of the distribution box according to the infrared signal, and generate a corresponding alarm signal when it is judged that there is a living being passing by at the inlet and outlet holes of the distribution box.

[0019] As a preferred solution, the plugging system for the inlet and outlet holes of the distribution box further includes: a temperature and humidity sensor;

[0020] The temperature and humidity sensor is arranged at a position in the plugging body close to the inlet and outlet holes of the distribution box;

[0021] The temperature and humidity sensor is used to collect the temperature data and humidity data at the inlet and outlet holes of the distribution box, and transmit the temperature data and humidity data to the host computer;

[0022] The host computer is further configured to determine whether the temperature inside the distribution box is abnormal according to the temperature data, determine whether the humidity inside the distribution box is abnormal according to the humidity data, generate a corresponding temperature abnormality alarm signal when it is determined that the temperature inside the distribution box is abnormal, and generate a corresponding humidity abnormality alarm signal when it is determined that the humidity inside the distribution box is abnormal.

[0023] As a preferred solution, determining whether the temperature inside the distribution box is abnormal according to the temperature data includes:

[0024] Comparing the temperature data with a preset temperature corresponding to the current moment, and determining that the temperature inside the distribution box is abnormal when the temperature data exceeds the preset temperature;

[0025] Determining whether the humidity inside the distribution box is abnormal according to the humidity data includes:

[0026] Comparing the humidity data with a preset humidity corresponding to the current moment, and determining that the humidity inside the distribution box is abnormal when the humidity data exceeds the preset humidity.

[0027] As a preferred solution, the plugging system for the inlet and outlet holes of the distribution box further includes: a water immersion sensor;

[0028] The water immersion sensor is arranged at a position close to the inlet and outlet holes of the distribution box in the plugging main body;

[0029] The water immersion sensor is used to collect the water level height data of the distribution box and transmit the water level height data to the host computer;

[0030] The host computer is further configured to determine whether the water level height inside the distribution box is abnormal according to the water level height data, and generate a corresponding water level abnormality alarm signal when it is determined that the water level height inside the distribution box is abnormal.

[0031] As a preferred solution, determining whether the water level height inside the distribution box is abnormal according to the water level height data includes:

[0032] Comparing the water level height data with a preset water level height corresponding to the current moment, and determining that the water level height inside the distribution box is abnormal when the water level height data exceeds the preset water level height.

[0033] As a preferred solution, the plugging system for the inlet and outlet holes of the distribution box further includes: a barometric pressure sensor;

[0034] The air pressure sensor is arranged at a position in the plugging body close to the wire inlet / outlet hole of the distribution box;

[0035] The air pressure sensor is used to collect the air pressure data at the wire inlet / outlet hole of the distribution box and transmit the air pressure data to the host computer;

[0036] The host computer is used to judge whether the air pressure in the distribution box is abnormal according to the air pressure data, and generate a corresponding air pressure abnormal alarm signal when it is judged that the air pressure in the distribution box is abnormal.

[0037] As a preferred solution, judging whether the air pressure in the distribution box is abnormal according to the air pressure data includes:

[0038] Comparing the air pressure data with a preset air pressure corresponding to the current moment, and judging that the air pressure in the distribution box is abnormal when the air pressure data exceeds the preset air pressure.

[0039] Compared with the prior art, the embodiment of the present invention has the following beneficial effects:

[0040] The present invention provides a plugging system for the wire inlet / outlet hole of a distribution box, including: a plugging body and a wire spring fixing device; the plugging body is a hollow conical double structure; the plugging body is made of PVC flame retardant material; several layers of protruding anti-slip skirts are arranged on the curved outer surface of the plugging body, and a through reserved hole extending along the conical axis direction is arranged in the central area of the plugging body; the wire spring fixing device passes through the reserved hole in parallel, and both ends are respectively fixed on the inner plane cutting surfaces of the two semi-cones of the plugging body; when plugging the wire inlet / outlet hole of the distribution box, the cable in the distribution box passes through the reserved hole, and the anti-slip skirt on the small diameter surface of the plugging body is fixed at the edge of the hole of the wire inlet / outlet hole on the outer wall of the distribution box and surrounds the periphery of the wire inlet / outlet hole; the wire spring fixing device applies pressure to the two semi-cones of the plugging body to make the cable fit with the hole wall of the reserved hole in the plugging body and the inner plane cutting surfaces of the two semi-cones of the plugging body fit. The plugging system for the wire inlet / outlet hole of the distribution box of the present invention is small in volume, strong in convenience, easy to be placed at the wire inlet / outlet of the distribution box, convenient to install, and the PVC material used in the plugging body is not easy to weather and has good performance. Placing it at the wire inlet / outlet of the distribution box can effectively prevent small animals from entering and exiting, thereby effectively protecting the safe operation of electrical equipment in the distribution box. Brief Description of the Drawings

[0041] Figure 1 is a schematic structural diagram of a plugging system for the wire inlet / outlet hole of a distribution box provided by an embodiment of the present invention;

[0042] Figure 2 is the complete design drawing of the plugging system for the wire inlet / outlet hole of the distribution box;

[0043] Figure 3 It is the installation direction diagram of the plugging body;

[0044] Figure 4 It is the conceptual diagram of the inductive communication module in the plugging system for the inlet and outlet holes of the distribution box;

[0045] Figure 5 It is the schematic diagram of data diagnosis based on the BP neural network;

[0046] Figure 6 It is the structure diagram of the BP neural network. Specific implementation manners

[0047] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0050] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0052] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0054] Embodiment 1

[0055] Please refer to Figure 1 , which is a schematic structural diagram of a plugging system for the inlet and outlet holes of a distribution box provided by an embodiment of the present invention, specifically including: a plugging main body and a wire spring fixing device;

[0056] The plugging main body is a hollow conical double structure; the plugging main body is made of PVC flame-retardant material;

[0057] The outer surface of the curved surface of the plugging main body is provided with several layers of protruding anti-slip skirts, and a through reserved hole extending along the conical axis direction is arranged in the central area of the plugging main body;

[0058] The wire spring fixing device passes through the reserved hole in parallel, and both ends are respectively fixed on the inner plane cutting surfaces of the two semi-cones of the plugging main body;

[0059] When plugging the inlet and outlet holes of the distribution box, the cable in the distribution box passes through the reserved hole, and the anti-slip skirt on the small-diameter surface of the plugging main body is fixed at the edge of the inlet and outlet hole on the outer wall of the distribution box and surrounds the periphery of the inlet and outlet hole;

[0060] The wire spring fixing device applies pressure to the two semi-cones of the plugging main body, so that the cable is in contact with the hole wall of the reserved hole in the plugging main body, and the inner plane cutting surfaces of the two semi-cones of the plugging main body are in contact.

[0061] Preferably, the reserved hole includes: a single-wire conductor hole, a two-wire conductor hole or a four-wire conductor hole.

[0062] Preferably, when the reserved hole is a two-wire conductor hole or a four-wire conductor hole, the sealing system for the inlet and outlet holes of the distribution box further includes: a conductor spacer gasket; the conductor spacer gasket is located between the incoming and outgoing cables within the reserved hole; the conductor spacer gasket is used to separate different cable lines and keep the cable lines in fixed positions within the reserved hole.

[0063] Specifically, please refer to Figure 2 , which is the complete design drawing of the sealing system for the inlet and outlet holes of the distribution box. The sealing system for the inlet and outlet holes of the distribution box includes the following structures:

[0064] 1. Sealing main body: It is a hollow conical double structure and is made of PVC flame-retardant material. The PVC flame-retardant material has characteristics such as corrosion resistance and high temperature resistance;

[0065] 2. Anti-slip skirt: Several layers of protruding anti-slip skirts are provided on the curved outer surface of the sealing main body;

[0066] When the sealing system seals the inlet and outlet holes of the distribution box, the anti-slip skirt can be well stuck at the inlet and outlet holes of the distribution box. In a specific embodiment, an anti-slip skirt with a five-layer umbrella skirt structure can be adopted. The five-layer umbrella skirt structure can effectively seal the inlet and outlet holes with a diameter in the range of 3 cm - 7 cm, has a wide adaptation range, and can effectively prevent small animals from entering and leaving the distribution box;

[0067] 3. Reserved hole: A through reserved hole extending along the conical axis direction is provided in the central area of the sealing main body; the reserved hole structure is applicable to single-wire, two-wire, four-wire and other conductor holes, and has a wide application range;

[0068] 4. Steel wire spring fixing device: The steel wire spring fixing device passes through the reserved hole in parallel, and both ends are respectively fixed on the inner plane cutting surfaces of the two semi-conical bodies of the sealing main body;

[0069] The steel wire spring fixing device can, on the one hand, be used to fix the position of the rodent-proof device; on the other hand, it can reserve a certain space for the rodent-proof device, having a certain margin, so that the small animal prevention device can be applicable to the on-site environment with different hole diameters.

[0070] Please refer to Figure 3, which is the installation direction diagram of the plugging body. During on-site installation, the operator needs to select a plugging body with a suitable single-port, double-port or four-port reserved hole according to the cable, pass the cable through the reserved hole of the plugging body, and then adjust the steel wire spring fixing device to make the cable fit the plugging body, achieving the plugging effect on the cable. Next, the operator will install the plugging body at the inlet and outlet holes of the distribution box. Outside the distribution box, face the small-diameter surface of the plugging body towards the inside of the box, and then apply an appropriate pressure towards the inside of the distribution box to make the anti-slip skirt of the plugging body engage with the inlet and outlet of the distribution box. The protruding frustum structure of the anti-slip skirt will catch the inlet and outlet of the distribution box, achieving a good plugging effect, thereby effectively preventing small animals such as mice from entering and exiting.

[0071] Preferably, the plugging system for the inlet and outlet holes of the distribution box further includes: an infrared sensor and a host computer; the infrared sensor is arranged at a position close to the inlet and outlet holes of the distribution box in the plugging body; the infrared sensor is used to collect the infrared signal at the inlet and outlet holes of the distribution box and transmit the infrared signal to the host computer; the host computer is used to judge whether there is a living being passing by at the inlet and outlet holes of the distribution box according to the infrared signal, and generate a corresponding alarm signal when it is judged that there is a living being passing by at the inlet and outlet holes of the distribution box.

[0072] Preferably, the plugging system for the inlet and outlet holes of the distribution box further includes: a temperature and humidity sensor; the temperature and humidity sensor is arranged at a position close to the inlet and outlet holes of the distribution box in the plugging body; the temperature and humidity sensor is used to collect the temperature data and humidity data at the inlet and outlet holes of the distribution box and transmit the temperature data and humidity data to the host computer; the host computer is further used to judge whether the temperature inside the distribution box is abnormal according to the temperature data, judge whether the humidity inside the distribution box is abnormal according to the humidity data, and generate a corresponding temperature abnormal alarm signal when it is judged that the temperature inside the distribution box is abnormal, and generate a corresponding humidity abnormal alarm signal when it is judged that the humidity inside the distribution box is abnormal.

[0073] Preferably, judging whether the temperature inside the distribution box is abnormal according to the temperature data includes: comparing the temperature data with the preset temperature corresponding to the current moment, and judging that the temperature inside the distribution box is abnormal when the temperature data exceeds the preset temperature; judging whether the humidity inside the distribution box is abnormal according to the humidity data includes: comparing the humidity data with the preset humidity corresponding to the current moment, and judging that the humidity inside the distribution box is abnormal when the humidity data exceeds the preset humidity.

[0074] Preferably, the sealing system for the inlet and outlet holes of the distribution box also includes: a water immersion sensor; the water immersion sensor is arranged in the sealing body at a position close to the inlet and outlet holes of the distribution box; the water immersion sensor is used to collect water level height data of the distribution box, and transmit the water level height data to the host computer; the host computer is also used to determine whether the water level height in the distribution box is abnormal based on the water level height data, and generate a corresponding water level abnormality alarm signal when it is determined that the water level height in the distribution box is abnormal.

[0075] Preferably, judging whether the water level in the distribution box is abnormal is based on the water level height data, including: comparing the water level height data with a preset water level height corresponding to the current moment, and when the water level height data exceeds the preset water level height, judging that the water level in the distribution box is abnormal.

[0076] Preferably, the sealing system for the inlet and outlet holes of the distribution box also includes: an air pressure sensor; the air pressure sensor is arranged in the sealing body at a position close to the inlet and outlet holes of the distribution box; the air pressure sensor is used to collect air pressure data at the inlet and outlet holes of the distribution box, and transmit the air pressure data to the host computer; the host computer is used to determine whether the air pressure in the distribution box is abnormal based on the air pressure data, and generate a corresponding air pressure abnormality alarm signal when it is determined that the air pressure in the distribution box is abnormal.

[0077] Preferably, judging whether the air pressure in the distribution box is abnormal based on the air pressure data includes: comparing the air pressure data with a preset air pressure corresponding to the current moment, and judging that the air pressure in the distribution box is abnormal when the air pressure data exceeds the preset air pressure.

[0078] Specifically, the blocking system further includes:

[0079] 5. Water immersion sensor and temperature and humidity sensor: arranged in the blocking body near the inlet and outlet holes of the distribution box;

[0080] The plugging system is equipped with a water sensor and a temperature and humidity sensor. The water sensor uses a contact water sensor, which uses an RS485 chip to output a normally open or normally closed signal at the contact point to prevent the equipment from being damaged by water. On the other hand, the temperature and humidity sensor also uses an RS485 chip to output the current collected value and upload it to the host computer through the established communication network. While monitoring the temperature and humidity of the distribution box, it can also determine whether there is an overload in the low voltage.

[0081] 6. Infrared sensor and air pressure sensor: arranged in the blocking body near the inlet and outlet holes of the distribution box;

[0082] The infrared sensor converts the collected infrared signal into a value ranging from 0 to 255 through A / D conversion, and determines whether there are small animals entering the observation area according to the size of the collected value. On the one hand, it prevents false alarms caused by detecting the temperature of the normal load terminal, and on the other hand, it can serve as the last line of defense for the sealing device. The air pressure sensor can collect the gas pressure inside the distribution box and provide basic data for subsequent algorithms.

[0083] 7. Communication module:

[0084] The probes inside the distribution box are connected to a communication module. After signal encoding and processing by the communication module, the data collected by each sensor is transmitted to the upper computer through the Ethernet network for timely analysis and perception processing by the staff.

[0085] 8. Upper computer.

[0086] Please refer to Figure 4 , which is a conceptual diagram of the induction communication module in the sealing system for the inlet and outlet holes of the distribution box. This system is equipped with a water immersion sensor, a temperature and humidity sensor, an air pressure sensor, an infrared sensor, and a communication module. Each sensor is initialized to collect data every 15 minutes, and upload the current temperature and humidity, gas pressure, and water level height data of the distribution box to the computer database of the upper computer. Then, the neural network is used to predict the value at the next moment based on the sensor measurement values at the previous moment, and compare and analyze the measured values and predicted values to determine the working condition of the distribution box. Please refer to Figure 5 , which is a schematic diagram of data diagnosis based on the BP neural network. First, the measurement values of the previous time are preprocessed, and then the preprocessing results enter the BP network to generate a predicted output. Finally, the residual processing link analyzes the predicted values (i.e., the preset temperature, preset humidity, preset water level height, and preset air pressure) and the measured values to obtain a prompt indicating whether the distribution box is normal or faulty, specifically including the following steps:

[0087] 1. Preprocessing link:

[0088] The preprocessing link completes the normalization processing of the sensor measurement values, which can eliminate the influence of data scale on the prediction results. The normalization method is to divide the difference between the sensor measurement value and its mean by the standard deviation. The mean and standard deviation can be obtained through statistical analysis of historical data. Suppose the data measured by the sensor at a certain moment t are respectively After normalization processing, the obtained data is

[0089]

[0090] where: μ i is the mean of the measurement values of the i-th sensor; σ i is the standard deviation of the measurement values of the i-th sensor.

[0091] 2. Neural network structure and algorithm:

[0092] The neural network adopts a three-layer structure: an input layer, a hidden layer, and an output layer. The number of nodes in the input layer and the output layer is the same. The input layer has n nodes, and the hidden layer has m nodes. is the connection weight between the input layer node and the hidden layer node. is the connection weight between the hidden layer node and the output layer node. The transformation function between each layer selects the sigmoid function. The output layer has n nodes, and the linear transformation function is taken. The training of the network is carried out using the BP algorithm.

[0093] 2.1. Forward transmission of information:

[0094] (1) The output of the j-th neuron in the hidden layer is:

[0095]

[0096] (2) The output of the k-th neuron in the output layer is:

[0097]

[0098] (3) Define the error function as:

[0099]

[0100] 2.2. Error backpropagation:

[0101] (1) Weight change in the output layer:

[0102] For the weight from the j-th input to the k-th output, there is:

[0103]

[0104] In the formula, δ jk = e k f 2 ′ , e k = t k - a 2k , e k is the error, μ is the learning rate, a 2k is the target output of the training sample, t k is the actual output of the neural network, f 2 ′ is the derivative of the transfer function of the output layer neuron.

[0105] (2) Threshold change in the output layer:

[0106]

[0107] where δ jk =(t k -a 2k ).f 2 ′ .

[0108] (3) Weight change of the hidden layer:

[0109] For the weight from the i-th input to the j-th output, there is:

[0110]

[0111] where: δ ij =e i .f 1 ′ ,

[0112] Threshold change of the hidden layer:

[0113] Δb 1j =μ.δ ij ;

[0114] 2.3. The number of hidden layer nodes is selected by the trial method, and the selection criterion is the mean squared error MSE between the output value and the ideal output value:

[0115]

[0116] In the formula, i is the number of nodes in the output layer of the network, i = 1, 2.....n; j is the number of training samples, j = 1, 2......p; is the output value of the j-th input sample; is the ideal output value of the j-th input sample.

[0117] In the database, the preprocessed air temperature, humidity, time, and gas pressure are used as input parameters, and the ideal output value (the parameters at the next moment) is used as the expected value (i.e., the preset temperature, preset humidity, preset water level height, and preset air pressure). By continuously adjusting the connection weights between the input layer and the output layer through the error between the actual output value and the ideal output value, the error range of the actual output value is reduced. By using the trained BP neural network algorithm to predict the changes in the next temperature, humidity, gas pressure, and distribution box water level height, the predicted change curve of the "safety value" inside the distribution box in the future time is obtained. Managers can observe the collected data and the future predicted change curve of the data in real time through the communication module to master the state inside the distribution box. Please refer to Figure 6 , which is the structure diagram of the BP neural network.

[0118] 3. Residual processing:

[0119] From a statistical analysis perspective, under the condition that the prediction model is precise enough, the difference between the predicted value and the true value of a sensor should follow a normal distribution with an expected value of 0. When the sensor has a deviation or drift fault, the expected value of its residual distribution will necessarily deviate from 0. Considering that the environment of each distribution box is different, corresponding expected control limits and variance control limits can be set. When the expected value of the residual distribution exceeds the expected control limit or the variance exceeds the variance control limit, it can be determined that the sensor has failed. Represents the residual value between the output value of the neural network at time t and the true measured value of the sensor. Represents the residual of the c-th sensor at time t.

[0120]

[0121] Since the measurement ranges of different sensors are different, when processing the residuals, generally the relative error of the residuals of each sensor is calculated separately first.

[0122]

[0123] Then this relative error is compared with the preset control limit. If it is within the control limit, the sensor is considered to be fault-free; otherwise, it is considered to have failed.

[0124] 4. Data analysis and diagnosis:

[0125] The fault diagnosis in the distribution box is realized by analyzing a large amount of on-site data. Figure 6 Is the fault analysis structure diagram. The standard database stores the basic information of the sensor measurement points and the data under normal working conditions. The real-time database stores the measured values of the sensors for a current period of time. The historical fault database stores the historical fault situations, treatment methods, and corresponding data before and after the faults of the sensor measurement points. The training module trains the BP network according to the normal working condition data in the standard measurement point database, and the trained network structure and weights are sent to the diagnosis module.

[0126] The diagnosis module diagnoses the current data based on the trained neural network and the historical fault situations of the sensor measurement points, and takes the prediction data fluctuating up and down by 20% as the preset comparison value (i.e., the preset temperature, preset humidity, preset water level height, and preset air pressure). When the real-time data exceeds the preset comparison value continuously for 3 times, the system will judge that the state inside the current distribution box is abnormal, and send the current fault situation and the historical fault and treatment plan of this sensor to the processing module. After receiving the fault occurrence information sent by the diagnosis module, the processing module automatically sends a reminder message to the management personnel, so as to perceive emergencies in advance and handle them quickly. After confirming that a fault has occurred, the processing module can send the new fault and the specific treatment plan of the management personnel to the historical fault database as a reference for future maintenance.

[0127] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A plugging system for the inlet and outlet holes of a distribution box, characterized in that: include: A plugging body and a wire spring fixing device; The blocking body is a hollow conical double-jointed structure; the blocking body is made of PVC flame-retardant material; The curved outer surface of the blocking body is provided with several layers of protruding anti-slip skirts, and the central area of ​​the blocking body is provided with a through reserved hole extending along the cone axis direction; The wire spring fixing device passes through the reserved hole in parallel, and the two ends are respectively fixed on the inner plane cutting surfaces of the two semi-conical bodies of the blocking body; When the inlet and outlet holes of the distribution box are blocked, the cables in the distribution box pass through the reserved holes, and the anti-slip skirt of the small diameter surface of the blocking body is fixed to the edge of the opening of the inlet and outlet holes on the outer wall of the distribution box, and surrounds the periphery of the inlet and outlet holes; The wire spring fixing device applies pressure to the two semi-cones of the blocking body to make the cable fit with the hole wall of the reserved hole in the blocking body, and the inner plane cutting surfaces of the two semi-cones of the blocking body fit with each other.

2. The plugging system for the inlet and outlet holes of the distribution box according to claim 1, characterized in that: The reserved holes include: single-wire conductor holes, double-wire conductor holes or four-wire conductor holes.

3. The plugging system for the inlet and outlet holes of the distribution box according to claim 2, characterized in that: When the reserved hole is a double-wire conductor hole or a four-wire conductor hole, the blocking system of the inlet and outlet holes of the distribution box further includes: a conductor spacing gasket; The conductor spacing gasket is located between the incoming and outgoing cables in the reserved hole; The conductor spacing gasket is used to separate different cables and keep the cables in a fixed position in the reserved holes.

4. The plugging system for the inlet and outlet holes of the distribution box according to claim 1, characterized in that: The blocking system for the inlet and outlet holes of the distribution box also includes: an infrared sensor and a host computer; The infrared sensor is arranged in the blocking body at a position close to the inlet and outlet holes of the distribution box; The infrared sensor is used to collect infrared signals at the inlet and outlet holes of the distribution box and transmit the infrared signals to the host computer; The host computer is used to determine whether there is a creature passing through the inlet and outlet holes of the distribution box according to the infrared signal, and generate a corresponding alarm signal when it is determined that there is a creature passing through the inlet and outlet holes of the distribution box.

5. The plugging system for the inlet and outlet holes of the distribution box according to claim 4, characterized in that: The blocking system for the inlet and outlet holes of the distribution box also includes: a temperature and humidity sensor; The temperature and humidity sensor is arranged in the blocking body at a position close to the inlet and outlet holes of the distribution box; The temperature and humidity sensor is used to collect temperature data and humidity data at the inlet and outlet holes of the distribution box, and transmit the temperature data and humidity data to the host computer; The host computer is also used to determine whether the temperature in the distribution box is abnormal based on the temperature data, and whether the humidity in the distribution box is abnormal based on the humidity data, and when it is determined that the temperature in the distribution box is abnormal, it generates a corresponding temperature abnormality alarm signal, and when it is determined that the humidity in the distribution box is abnormal, it generates a corresponding humidity abnormality alarm signal.

6. The plugging system for the inlet and outlet holes of the distribution box according to claim 5, characterized in that: Judging whether the temperature in the distribution box is abnormal according to the temperature data includes: Compare the temperature data with the preset temperature corresponding to the current moment, and when the temperature data exceeds the preset temperature, determine that the temperature in the distribution box is abnormal; The step of judging whether the humidity in the distribution box is abnormal according to the humidity data includes: The humidity data is compared with the preset humidity corresponding to the current moment, and when the humidity data exceeds the preset humidity, it is determined that the humidity in the distribution box is abnormal.

7. The plugging system for the inlet and outlet holes of the distribution box according to claim 6, characterized in that: The blocking system for the inlet and outlet holes of the distribution box also includes: a water immersion sensor; The water immersion sensor is arranged in the blocking body at a position close to the inlet and outlet holes of the distribution box; The water immersion sensor is used to collect water level data of the distribution box and transmit the water level data to the host computer; The host computer is also used to determine whether the water level in the distribution box is abnormal based on the water level data, and generate a corresponding water level abnormality alarm signal when it is determined that the water level in the distribution box is abnormal.

8. The plugging system for the inlet and outlet holes of the distribution box according to claim 7, characterized in that: Judging whether the water level in the distribution box is abnormal according to the water level data includes: The water level height data is compared with a preset water level height corresponding to the current moment. When the water level height data exceeds the preset water level height, it is determined that the water level height in the distribution box is abnormal.

9. The plugging system for the inlet and outlet holes of the distribution box according to claim 8, characterized in that: The blocking system for the inlet and outlet holes of the distribution box also includes: an air pressure sensor; The air pressure sensor is arranged in the blocking body at a position close to the inlet and outlet holes of the distribution box; The air pressure sensor is used to collect air pressure data at the inlet and outlet holes of the distribution box and transmit the air pressure data to the host computer; The host computer is used to determine whether the air pressure in the distribution box is abnormal based on the air pressure data, and generate a corresponding air pressure abnormality alarm signal when it is determined that the air pressure in the distribution box is abnormal.

10. The plugging system for the inlet and outlet holes of the distribution box according to claim 9, characterized in that: Judging whether the air pressure in the distribution box is abnormal according to the air pressure data includes: The air pressure data is compared with a preset air pressure corresponding to the current moment, and when the air pressure data exceeds the preset air pressure, it is determined that the air pressure in the distribution box is abnormal.

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