Intelligent temperature control system of explosion-proof equipment for underground coal mine vehicle and control method of intelligent temperature control system

Abstract

The invention discloses an explosion-proof equipment intelligent temperature control system for an underground coal mine vehicle and a control method thereof, and relates to the field of intelligent control. The system comprises an explosion-proof electric cabinet, a main control system and a thermal cycle management system, wherein the explosion-proof electric control box comprises an explosion-proof charger and a sensor subsystem; the sensor subsystem is used for detecting temperature data, voltage data and current data of the explosion-proof charger in real time; the main control system is connected with the explosion-proof charger, the sensor subsystem and the thermal cycle management system, mainly generates a control instruction based on the voltage data and the current data, and generates a temperature control signal based on the temperature data; and the thermal cycle management system is connected with the main control system and is mainly used for controlling the temperature of the explosion-proof charger based on the temperature control signal. The explosion-proof charger and the thermal cycle management system are controlled through the main control system, so that the real-time heat dissipation effect of the explosion-proof charger is improved, and the explosion-proof charger stably operates during working.

Description

Technical Field

[0001] The present application relates to the field of intelligent control, and in particular to an intelligent temperature control system for explosion-proof equipment for vehicles in underground coal mines and a control method thereof. Background Art

[0002] As battery-assisted transport vehicles are increasingly used in coal mines and other industrial fields, especially in mining areas with good geological conditions, such as the Shendong mining area, mining battery support transport vehicles have been widely used due to their unique advantages. In order to ensure that the battery can be charged in a timely and efficient manner, so that the battery-assisted transport vehicles can meet the needs of continuous operation in the mine, the vehicles are equipped with a dedicated high-power explosion-proof charger.

[0003] At present, the power of explosion-proof chargers is mostly in the medium and low power range, and is mainly used for ground charging after the vehicle is lifted from the mine. However, with the continuous increase in the load of mining battery vehicles and the increase in vehicle range, the design of battery rated voltage level and capacity is also increasing, resulting in higher requirements for high power and compact structure of chargers. These factors require that the charger must have the ability to carry high-power electrical components for heat dissipation, fast charging, and easy and fast transportation during the design stage.

[0004] Known explosion-proof chargers mainly include two major components: a step-down unit and a rectifier unit. The step-down unit converts the high-voltage power supply into the low-voltage power supply required by the rectifier unit through a step-down transformer, and the rectifier unit converts the AC power into DC power by controlling the conduction angle of the thyristor. During the operation of the charger, the main components such as the transformer and thyristor will generate a lot of heat. If the system cannot effectively control the heat dissipation, it will cause the charger to operate unstably, and even cause irreversible consequences such as damage to the transformer or power device, thereby bringing safety hazards and increasing the failure rate and use cost of the charger. Summary of the invention

[0005] The purpose of this application is to provide an intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines and a control method thereof, which can intelligently adjust the working state of the heat dissipation equipment in a high-power explosion-proof charger, ensure that the temperature inside the explosion-proof charger case is maintained within an appropriate range, and enable the explosion-proof charger to operate stably under high-power output conditions.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, an intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines is provided, comprising:

[0008] An explosion-proof electric control box, comprising an explosion-proof charger and a sensor subsystem; the sensor subsystem is used to detect the operating data of the explosion-proof charger in real time; the operating data includes temperature data, voltage data and current data;

[0009] A main control system, connected to the explosion-proof charger and the sensor subsystem, respectively, for generating a temperature control signal based on the temperature data, and generating a control instruction based on the voltage data and the current data; the control instruction is used to control the opening and closing of the explosion-proof charger;

[0010] A thermal cycle management system is connected to the explosion-proof charger and the main control system, respectively, and is used to control the temperature of the explosion-proof charger based on the temperature control signal.

[0011] Preferably, the explosion-proof charger comprises:

[0012] The transformer unit is used to reduce the voltage of the external input power;

[0013] A rectifying unit, connected to the transformer unit, for rectifying the current output by the power supply after the voltage reduction process;

[0014] The flameproof control box adopts a double-box structure and is used to place the transformer unit and the rectifier unit in separate boxes.

[0015] Preferably, the sensor subsystem comprises:

[0016] A temperature sensing module, connected to the main control system, for detecting the temperature data of the explosion-proof charger in real time;

[0017] The voltage and current sensing modules are connected to the explosion-proof charger and the main control system respectively, and are used to detect the voltage data and current data of the explosion-proof charger in real time.

[0018] Preferably, the thermal cycle management system comprises: a liquid storage tank, a radiator, a mining flameproof motor and a rubber hose;

[0019] The liquid storage tank comprises: an upper liquid storage tank and a lower liquid storage tank; the liquid storage tank is provided with a liquid inlet, a liquid outlet, a liquid replenishing port and an exhaust valve; the liquid inlet is arranged on the upper liquid storage tank, and the liquid outlet is arranged on the lower liquid storage tank; the coolant in the lower liquid storage tank is injected into the explosion-proof charger through the liquid outlet to exchange heat with the explosion-proof charger; the coolant after heat exchange flows back to the upper liquid storage tank through the liquid inlet;

[0020] The radiator comprises: a radiator core, a wind protection ring and an air filter; the radiator core is connected to the upper liquid storage tank and the lower liquid storage tank respectively, and the radiator core is used to circulate the coolant after heat exchange to cool down; the coolant after cooling flows back to the lower liquid storage tank; the air filter is arranged at the end of the radiator, and the air filter is used to filter dust;

[0021] The mining flameproof motor is used to drive the radiator to work;

[0022] The rubber hose provides a channel for the coolant to be injected into the explosion-proof charger and for the coolant after heat exchange to flow back to the upper water storage tank.

[0023] Preferably, the mining flameproof motor comprises: a first explosion-proof motor; the first explosion-proof motor is arranged on a radiator, and the first explosion-proof motor is integrated with the radiator core and the wind shield.

[0024] Preferably, the first explosion-proof motor is a water-cooled DC permanent magnet explosion-proof motor.

[0025] Preferably, the main control system comprises:

[0026] A metering control unit connected to the thermal cycle management system, for measuring in real time the metering information of the coolant in the explosion-proof charger; the metering information includes the weight of the coolant in the explosion-proof charger, the flow rate of the coolant injected into the explosion-proof charger, and the cumulative amount of the coolant injected into the explosion-proof charger;

[0027] a transmitting and receiving unit, connected to the sensor subsystem, the explosion-proof charger and the thermal cycle management system, respectively, for receiving the temperature data, the voltage data and the current data in real time, and for outputting the control instruction and the temperature control signal;

[0028] a main control system processing unit, connected to the sending and receiving unit and the metering control unit, respectively, for generating the temperature control signal based on the temperature data, generating the control instruction based on the voltage data and the current data, generating a flow rate adjustment instruction based on the metering information, and further for visualizing the temperature data, the voltage data, the current data and the metering information;

[0029] The display and information input unit is connected to the main control system processing unit and is used to display the temperature data, the voltage data, the current data and the metering information after visualization processing.

[0030] Preferably, the metering control unit comprises:

[0031] A static machine weight measurement module, used for measuring the weight of the coolant in the explosion-proof charger in real time;

[0032] A dynamic flow measurement module, used to measure the flow rate of the coolant during the process of injecting the coolant into the explosion-proof electric control box and the cumulative amount of the injected coolant;

[0033] A flow rate control module is used to control the flow rate of the coolant injected into the explosion-proof charger according to the flow regulation instruction.

[0034] In a second aspect, a control method for an intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines is provided, comprising:

[0035] Obtain voltage and current data of explosion-proof charger in real time;

[0036] Determining whether the explosion-proof charger is in a working state based on the voltage data and the current data;

[0037] When the explosion-proof charger is in working state, obtaining temperature data of the explosion-proof charger in real time;

[0038] Determine whether the temperature data exceeds a temperature threshold; if the temperature data exceeds the temperature threshold, generate a temperature control signal, and use the temperature control signal to cool the explosion-proof charger;

[0039] According to the voltage data and the current data of the explosion-proof charger, determine whether the voltage data and the current data are within a set range; when the voltage data and the current data are within the set range, the system operates normally; when the voltage data and the current data are not within the set range, it is determined that the explosion-proof charger has a fault, enters a fault protection state, and generates a control instruction to stop the explosion-proof charger.

[0040] Preferably, the temperature control signal is used to cool the explosion-proof charger, including:

[0041] Controlling the injection of coolant into the explosion-proof charger according to the temperature control signal;

[0042] The weight of the coolant in the explosion-proof charger is obtained in real time, and a flow adjustment instruction is generated according to the weight of the coolant to control the flow rate of the injected coolant;

[0043] Acquiring the temperature of the coolant circulating in the liquid storage tank, and determining whether the temperature of the coolant circulating in the liquid storage tank is higher than the coolant temperature range;

[0044] When the temperature of the coolant circulating in the liquid storage tank is higher than the coolant temperature range, new coolant is injected into the liquid storage tank from the outside.

[0045] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0046] The present application provides an intelligent temperature control system and control method for explosion-proof equipment for underground vehicles in coal mines. The main control system obtains the temperature data, voltage data and current data of the explosion-proof charger in real time, and then controls the temperature of the explosion-proof charger during operation according to the real-time acquired data, thereby solving the problem of untimely heat dissipation of the charger when running at high power, maintaining the temperature inside the explosion-proof electric control box within an appropriate range, ensuring that the high-power explosion-proof charger operates stably when working in a high-power output state, improving the working efficiency of the explosion-proof charger, and preventing the potential safety hazards caused by the explosion-proof charger during operation, thereby reducing the failure rate and use cost of the explosion-proof charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 This is a schematic diagram of the structure of an intelligent temperature control system for explosion-proof equipment for underground vehicles in a coal mine in one embodiment of the present application;

[0049] Figure 2 This is a schematic diagram of the structure of an intelligent temperature control system for explosion-proof equipment for underground vehicles in a coal mine from another perspective in one embodiment of the present application;

[0050] Figure 3 This is a schematic diagram of a heat cycle management system controlled by an intelligent temperature control system in one embodiment of the present application;

[0051] Figure 4 for Figure 1 Intelligent control principle diagram of intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines;

[0052] Figure 5 This is a schematic diagram of the main control system structure in one embodiment of the present application;

[0053] Figure 6 This is a schematic diagram of the structure of a thermal cycle management system in one embodiment of the present application;

[0054] Figure 7 for Figure 6 Schematic diagram of the thermal cycle management system structure from another perspective.

[0055] Figure numerals: 1-explosion-proof electric control box, 2-heat cycle management system, 3-main control system, 101-transformer unit, 101-1-transformer, 101-2-synchronous transformer, 102-rectifier unit, 102-1-rectifier module, 102-2-isolated DC / DC converter module, 103-main controller, 104-sensor subsystem, -105-explosion-proof control box, 20-radiator, 200-liquid storage tank, 201-upper storage Liquid tank, 202-lower liquid storage tank, 203-radiator core, 204-wind protection ring, 205-liquid inlet, 206-liquid outlet, 207-exhaust valve, 208-liquid filling port, 30-mine explosion-proof motor, 30-1-first explosion-proof motor, 30-2-second explosion-proof motor, 40-air filter, 301-transmitting and receiving unit, 302-main control system processing unit, 303-display and information entry unit, 304-metering control unit. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] The purpose of the present invention is to provide an intelligent temperature control system and control method for explosion-proof equipment for underground vehicles in coal mines, so as to realize intelligent adjustment of the working state of the heat dissipation equipment in a high-power explosion-proof charger, ensure that the temperature inside the explosion-proof charger case is maintained within an appropriate range, and enable the explosion-proof charger to operate stably under high-power output conditions.

[0058] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0059] like Figure 1 , Figure 2 and Figure 3 As shown, the present application provides an intelligent temperature control system for explosion-proof equipment for vehicles in coal mines, comprising: an explosion-proof electric control box 1, a thermal cycle management system 2 and a main control system 3.

[0060] The explosion-proof electric control box 1 includes an explosion-proof charger and a sensor subsystem 104. The sensor subsystem 104 is used to detect the temperature data, voltage data and current data of the explosion-proof charger in real time. The main control system 3 is connected to the explosion-proof charger and the sensor subsystem 104 respectively, and is used to generate a temperature control signal based on the temperature data, and to generate a control instruction based on the voltage data and the current data. The control instruction is used to control the explosion-proof charger; the thermal cycle management system 2 is connected to the explosion-proof electric control box 1 and the main control system 3 respectively, and is used to realize the temperature control of the explosion-proof charger based on the temperature control signal.

[0061] Furthermore, in order to ensure the reliability of the explosion-proof charger, Figure 1 , Figure 2 and Figure 4 As shown, the explosion-proof charger includes: a transformer unit 101, a rectifier unit 102 and a flameproof control box 105. The transformer unit 101 is used to reduce the voltage of the external input power. The rectifier unit 102 is connected to the transformer unit 101, and the rectifier unit 102 is used to rectify the current output by the power supply after the voltage reduction process. The flameproof control box 105 adopts a double box structure, which is used to place the transformer unit 101 and the rectifier unit 102 in separate boxes.

[0062] The transformer unit 101 includes a transformer 101-1 and a synchronous transformer 101-2, which, by changing the pressure level, steps down the high voltage power supply input from the outside into a low voltage power supply available to the rectifier unit 102. The rectifier unit 102 includes a rectifier module 102-1 and an isolated DC / DC conversion module 102-2, which, by controlling the conduction angle of the thyristor, rectifies and converts the current output by the stepped-down power supply from AC to DC.

[0063] Specifically, the sensor subsystem 104 includes a temperature sensing module and a voltage and current sensing module. The temperature sensing module is connected to the main control system 3, and the temperature sensing module is used to detect the temperature data of the explosion-proof charger in real time. The voltage and current sensing modules are connected to the explosion-proof charger and the main control system 3 respectively, and the voltage and current sensing modules are used to detect the voltage data and current data of the explosion-proof charger in real time.

[0064] In one embodiment provided in this application, Figure 3 , Figure 6 and Figure 7 As shown, the heat cycle management system 2 includes: a liquid storage tank 200, a radiator 20, a mining flameproof motor 30 and a rubber hose.

[0065] The liquid storage tank 200 includes an upper liquid storage tank 201 and a lower liquid storage tank 202. The liquid storage tank 200 is provided with a liquid inlet 205, a liquid outlet 206, a liquid replenishing port 208 and an exhaust valve 207. The liquid inlet 205 is provided on the upper liquid storage tank 201, and the liquid outlet 206 is provided on the lower liquid storage tank 202. When the thermal cycle management system 2 is working, the coolant in the lower liquid storage tank 202 is injected into the explosion-proof charger through the liquid outlet 206, and heat is exchanged with the explosion-proof charger. After the heat exchange, the coolant flows back to the upper liquid storage tank 201 through the liquid inlet 205.

[0066] The radiator 20 includes: a radiator core 203, a wind protection ring 204 and an air filter 40. The radiator core 203 is connected to the upper liquid storage tank 201 and the lower liquid storage tank 202 respectively, and is used to circulate and cool the coolant flowing back to the upper liquid storage tank 201 after heat exchange, and the cooled coolant flows to the lower liquid storage tank 202. The air filter 40 is arranged at the end of the radiator 20, and is used to filter dust to prevent the radiator 20 from being blocked and affecting the efficiency of the circulation and cooling of the radiator core 203.

[0067] The mining flameproof motor 30 is used to drive the radiator 20 to work.

[0068] The rubber hose provides a channel for the coolant to be injected into the explosion-proof charger and for the coolant after heat exchange to flow back to the upper liquid storage tank 201.

[0069] The mining flameproof motor 30 may include a first explosion-proof motor 30-1. The first explosion-proof motor 30-1 is disposed on the radiator 20 and is integrated with the radiator core 203 and the wind shield 204. The first explosion-proof motor 30-1 is a water-cooled DC permanent magnet explosion-proof motor.

[0070] In other embodiments provided in the present application, the rubber hose may also be used as a coolant flow channel connecting the upper liquid storage tank 201 and the radiator core 203 and the lower liquid storage tank 202 and the radiator core 203 .

[0071] In another embodiment provided in the present application, the mining flameproof motor 30 may include a first explosion-proof motor 30-1 and a second explosion-proof motor 30-2. The first explosion-proof motor 30-1 is arranged on the radiator 20, and is integrated with the radiator core 203 and the wind shield 204. The first explosion-proof motor 30-1 is used to drive the radiator 20 to work, so that the radiator core 203 circulates and cools the coolant flowing back to the upper liquid storage tank 201 after heat exchange, and the cooled coolant flows to the lower liquid storage tank 202. The second explosion-proof motor 30-2 can be flexibly arranged according to actual needs. Among them, the first explosion-proof motor 30-1 and the second explosion-proof motor 30-2 are both water-cooled DC permanent magnet explosion-proof motors.

[0072] In one embodiment provided in the present application, for ease of operation, as Figure 2 , Figure 4 and Figure 5 As shown, the main control system 3 is configured as an integrated circuit with the main controller 103 as a core processor and peripheral circuits as functional units.

[0073] The main control system 3 includes: a metering control unit 304 , a sending and receiving unit 301 , a main control system processing unit 302 and a display and information input unit 303 .

[0074] The metering control unit 304 is connected to the thermal cycle management system 2, and is used to measure the metering information of the coolant in the explosion-proof charger. The metering information includes the real-time weight of the coolant in the explosion-proof charger, the flow rate of the coolant injected into the explosion-proof charger, and the cumulative amount of the coolant injected into the explosion-proof charger.

[0075] The transmitting and receiving unit 301 is respectively connected to the sensor subsystem 104, the explosion-proof charger and the thermal cycle management system 2. The transmitting and receiving unit 301 is used to receive temperature data, voltage data and current data, and is also used to output control instructions and temperature control signals.

[0076] The main control system processing unit 302 is connected to the sending and receiving unit 301 and the metering control unit 304 respectively. The main control system processing unit 302 is used to generate a temperature control signal based on the temperature data, generate a control instruction based on the voltage data and the current data, and generate a flow adjustment instruction based on the metering information. The main control system 3 processing unit is also used to visualize the temperature data, voltage data, current data and metering information.

[0077] The display and information entry unit 303 is connected to the main control system processing unit 302, and the display and information entry unit 303 is used to display the visualized processed temperature data, voltage data, current data and metering information.

[0078] It should be noted that, for ease of operation, the main control system 3 is set as an integrated circuit with the main controller 103 as the core processor and the peripheral circuit as the functional unit. The display and information entry unit 303 may also include a display screen, a calendar clock and a ferromagnetic random access memory (FRAM). The sending and receiving unit 301 may be connected to a human-machine interface (HMI). The HMI may be used to manually control the main control system 3, and may also manually control the opening and closing of the explosion-proof charger. In order to reduce the size of the equipment, the integrated circuit may be set in an explosion-proof electric control box 1.

[0079] The display screen is connected to the main controller 103 via a serial port, and the display screen is used to display the visualized temperature data, voltage data, current data and metering information. The main controller 103 is connected to the calendar clock circuit so that the display screen displays real time. FRAM is connected to the main controller 103, and the FRAM is used to store the real-time measured temperature data, voltage data, current data and metering information, and the data at a certain moment can be viewed by operating the HMI.

[0080] The metering control unit 304 includes: a static machine weight measurement module, a dynamic flow measurement module and a flow rate control module. The static machine weight measurement module is used to measure the weight of the coolant in the explosion-proof charger in real time. The dynamic flow measurement module is used to measure the flow rate of the coolant injected into the explosion-proof charger and the cumulative amount of the coolant injected into the explosion-proof charger. The flow rate control module is used to control the flow rate of the coolant injected into the explosion-proof charger according to the flow adjustment instruction.

[0081] In this embodiment, the main controller 103 is provided with a CAN interface, which is connected to the thermal cycle management system 2 through a CAN bus to transmit temperature control signals and temperature information of the coolant in the thermal cycle management system 2. The main controller 103 is also provided with a DI input module, and the temperature data, voltage data, and current data detected in real time by the sensor subsystem 104 are transmitted to the main controller 103 through the DI input module. The main controller 103 is also provided with a DO output module, and the control instructions are output to the explosion-proof charger through the DO output module, thereby controlling the opening and closing of the explosion-proof charger.

[0082] The main controller 103 is provided with an AI input module and a PWM drive circuit. The metering information detected in real time by the metering control unit 304 is transmitted to the main controller 103 through the AI ​​input module, and the flow adjustment instruction is output to the flow rate control module of the metering control unit 304 through the PWM drive circuit. The main controller 103 is also connected to a deadlock detection circuit to determine whether the main control system 3 is operating normally. When the main control system 3 fails, the deadlock monitoring circuit generates a PWM output locking signal, which controls the flow rate control module through the PWM drive circuit to control the flow rate of the coolant injected into the explosion-proof charger.

[0083] It should be noted that, AI input refers to analog input, DI input refers to digital input, DO output refers to digital output, CAN bus refers to controller area network bus (Controller Area Network, CAN), and CAN interface refers to the communication interface of the CAN bus.

[0084] Utilizing the intelligent temperature control system for explosion-proof equipment for underground coal mine vehicles provided by the above-mentioned embodiment, the present application also provides a control method for the intelligent temperature control system for explosion-proof equipment for underground coal mine vehicles. The method is not limited to the application of the intelligent temperature control system for explosion-proof equipment for underground coal mine vehicles provided by the above-mentioned embodiment.

[0085] Specifically, in order to make the explosion-proof charger run stably under high power output, the control method of the intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines includes:

[0086] Get the voltage and current data of the explosion-proof charger in real time.

[0087] Determine whether the explosion-proof charger is in working state based on the voltage data and the current data.

[0088] When the explosion-proof charger is in working state, the temperature data of the explosion-proof charger is obtained in real time.

[0089] Determine whether the temperature data exceeds the temperature threshold. If the temperature data exceeds the temperature threshold, generate a temperature control signal, and use the temperature control signal to cool the explosion-proof charger.

[0090] According to the voltage data and current data of the explosion-proof charger, it is judged whether the voltage data and current data are within the set range. When the voltage data and current data are within the set range, the system operates normally. When the voltage data and current data are not within the set range, it is determined that the explosion-proof charger has a fault, enters the fault protection state, and generates a control command to stop the explosion-proof charger.

[0091] Furthermore, in order to control the temperature of the explosion-proof charger in real time, a temperature control signal is used to cool the explosion-proof charger, including:

[0092] The coolant is injected into the explosion-proof charger according to the temperature control signal.

[0093] The weight of the coolant in the explosion-proof charger is obtained in real time, and a flow adjustment instruction is generated according to the weight of the coolant to control the flow rate of the injected coolant.

[0094] The temperature of the coolant circulating in the storage tank is obtained to determine whether the temperature of the coolant circulating in the storage tank is higher than the coolant temperature range. When the temperature of the coolant circulating in the storage tank is higher than the coolant temperature range, new coolant is injected into the storage tank from the outside.

[0095] Among them, after obtaining the weight of the coolant in the explosion-proof charger, the weight of the coolant in the explosion-proof charger is compared with the set pre-loaded amount. If the weight of the coolant in the explosion-proof charger is less than the set pre-loaded amount, the flow regulation instruction controls the flow rate control module to increase the flow rate until the weight of the coolant in the explosion-proof charger reaches the set pre-loaded amount. Then the flow regulation instruction controls the flow rate control module to adjust the flow rate so that the flow rate of the coolant injected into and out of the explosion-proof charger is consistent.

[0096] In other embodiments, the cumulative amount of coolant injected into the explosion-proof charger can also be obtained to determine whether the cumulative amount of coolant injected has reached a set upper limit. When the cumulative amount of coolant injected has reached the upper limit, a flow regulation instruction is generated to control the flow rate control module to stop injecting coolant.

[0097] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. An intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines, characterized in that: The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines includes: An explosion-proof electric control box, comprising an explosion-proof charger and a sensor subsystem; the sensor subsystem is used to detect the operating data of the explosion-proof charger in real time; the operating data includes temperature data, voltage data and current data; A main control system, connected to the explosion-proof charger and the sensor subsystem, respectively, for generating a temperature control signal based on the temperature data, and generating a control instruction based on the voltage data and the current data; the control instruction is used to control the opening and closing of the explosion-proof charger; A thermal cycle management system is connected to the explosion-proof charger and the main control system, respectively, and is used to control the temperature of the explosion-proof charger based on the temperature control signal.

2. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 1 is characterized in that: The explosion-proof charger comprises: The transformer unit is used to reduce the voltage of the external input power; A rectifying unit, connected to the transformer unit, for rectifying the current output by the power supply after the voltage reduction process; The flameproof control box adopts a double-box structure and is used to place the transformer unit and the rectifier unit in separate boxes.

3. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 1 is characterized in that: The sensor subsystem includes: A temperature sensing module, connected to the main control system, for detecting the temperature data of the explosion-proof charger in real time; The voltage and current sensing modules are connected to the explosion-proof charger and the main control system respectively, and are used to detect the voltage data and current data of the explosion-proof charger in real time.

4. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 1 is characterized in that: The thermal cycle management system includes: a liquid storage tank, a radiator, a mining flameproof motor and a rubber hose; The liquid storage tank comprises: an upper liquid storage tank and a lower liquid storage tank; the liquid storage tank is provided with a liquid inlet, a liquid outlet, a liquid replenishing port and an exhaust valve; the liquid inlet is arranged on the upper liquid storage tank, and the liquid outlet is arranged on the lower liquid storage tank; the coolant in the lower liquid storage tank is injected into the explosion-proof charger through the liquid outlet to exchange heat with the explosion-proof charger; the coolant after heat exchange flows back to the upper liquid storage tank through the liquid inlet; The radiator comprises: a radiator core, a wind protection ring and an air filter; the radiator core is connected to the upper liquid storage tank and the lower liquid storage tank respectively, and the radiator core is used to circulate the coolant after heat exchange to cool down; the coolant after cooling flows back to the lower liquid storage tank; the air filter is arranged at the end of the radiator, and the air filter is used to filter dust; The mining flameproof motor is used to drive the radiator to work; The rubber hose provides a channel for the coolant to be injected into the explosion-proof charger and for the coolant after heat exchange to flow back to the upper water tank.

5. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 4 is characterized in that: The explosion-proof motor for mining comprises: a first explosion-proof motor; the first explosion-proof motor is arranged on a radiator, and the first explosion-proof motor is integrated with the radiator core and the wind shielding ring.

6. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 5 is characterized in that: The first explosion-proof motor is a water-cooled DC permanent magnet explosion-proof motor.

7. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 4 is characterized in that: The main control system comprises: A metering control unit connected to the thermal cycle management system, for measuring in real time the metering information of the coolant in the explosion-proof charger; the metering information includes the weight of the coolant in the explosion-proof charger, the flow rate of the coolant injected into the explosion-proof charger, and the cumulative amount of the coolant injected into the explosion-proof charger; a transmitting and receiving unit, connected to the sensor subsystem, the explosion-proof charger and the thermal cycle management system, respectively, for receiving the temperature data, the voltage data and the current data in real time, and for outputting the control instruction and the temperature control signal; a main control system processing unit, connected to the sending and receiving unit and the metering control unit, respectively, for generating the temperature control signal based on the temperature data, generating the control instruction based on the voltage data and the current data, generating a flow rate adjustment instruction based on the metering information, and further for visualizing the temperature data, the voltage data, the current data and the metering information; The display and information input unit is connected to the main control system processing unit and is used to display the temperature data, the voltage data, the current data and the metering information after visualization processing.

8. The intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 7, characterized in that: The metering control unit comprises: A static machine weight measurement module, used to measure the weight of the coolant in the explosion-proof charger in real time; A dynamic flow measurement module, used to measure the flow rate of the coolant during the process of injecting the coolant into the explosion-proof electric control box and the cumulative amount of the injected coolant; A flow rate control module is used to control the flow rate of the coolant injected into the explosion-proof charger according to the flow regulation instruction.

9. A control method for an intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines, characterized in that: The control method of the intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines is applied to the intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines as claimed in any one of claims 1 to 8; The control method of the intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines includes: Obtain voltage and current data of explosion-proof charger in real time; Determining whether the explosion-proof charger is in a working state based on the voltage data and the current data; When the explosion-proof charger is in working state, obtaining temperature data of the explosion-proof charger in real time; Determine whether the temperature data exceeds a temperature threshold; if the temperature data exceeds the temperature threshold, generate a temperature control signal, and use the temperature control signal to cool the explosion-proof charger; According to the voltage data and the current data of the explosion-proof charger, determine whether the voltage data and the current data are within a set range; when the voltage data and the current data are within the set range, the system operates normally; when the voltage data and the current data are not within the set range, it is determined that the explosion-proof charger has a fault, enters a fault protection state, and generates a control instruction to stop the explosion-proof charger.

10. The control method of the intelligent temperature control system for explosion-proof equipment for underground vehicles in coal mines according to claim 9, characterized in that: The temperature control signal is used to cool the explosion-proof charger, including: Controlling the injection of coolant into the explosion-proof charger according to the temperature control signal; The weight of the coolant in the explosion-proof charger is obtained in real time, and a flow adjustment instruction is generated according to the weight of the coolant to control the flow rate of the injected coolant; Acquiring the temperature of the coolant circulating in the liquid storage tank, and determining whether the temperature of the coolant circulating in the liquid storage tank is higher than the coolant temperature range; When the temperature of the coolant circulating in the liquid storage tank is higher than the coolant temperature range, new coolant is injected into the liquid storage tank from the outside.

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