Explosion-proof devices and mining motor detection devices
By designing explosion-proof devices in the mine, using explosion-proof cable introduction devices and explosion-proof wiring terminals, the problem of electrical equipment prone to explosion in explosive environments is solved, and the safe operation of the equipment and the reduction of explosion risks are achieved.
Patent Information
- Application Number
- CN202420477424.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-03-12
AI Technical Summary
In mines, electrical equipment is prone to accidents caused by explosive dangerous gases and coal dust, and the prior art is difficult to effectively prevent the risk of explosion.
An explosion-proof device is designed, including a transformer box and a main box. By setting up an explosion-proof cable introduction device and explosion-proof wiring terminals, it ensures that the transmission of current and voltage signals will not cause sparks or heat, thereby preventing explosions.
It effectively reduces the risk of explosions caused by mining motor monitoring devices during work, ensures the safe operation of equipment, and is suitable for mine environments with explosive and dangerous gases.
Smart Images
Figure CN222704693U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mining devices, in particular to an explosion-proof device and a mining motor detection device. Background Art
[0002] As the main power source of mechanical equipment, motors have been widely used in all aspects of our lives. The motor is like our human heart, which ensures the normal operation of the equipment by converting electrical energy into mechanical energy. However, since the motor is kept in operation for a long time in actual use, with the increasing load, various types of faults are prone to occur. This requires technicians to be able to find problems in time, deal with problems, and give accurate solutions, so as to increase the service life of the motor. However, the environment in mines is harsh, and some have flammable gases, which are prone to explosions and other accidents when using electrical parts. Utility Model Content
[0003] (I) Purpose of the utility model
[0004] The utility model aims to provide an explosion-proof device and a mining motor detection device which can be applied to mines with explosive dangerous gases and coal dust and can significantly reduce the risk of explosion.
[0005] (II) Technical solution
[0006] To achieve the above-mentioned purpose, the first aspect of the utility model provides an explosion-proof device for explosion-proof protection of a mining motor detection device, comprising: a transformer box and a main box connected to each other; the transformer box is provided with a first explosion-proof cable introduction device, a second explosion-proof cable introduction device, a first explosion-proof terminal and a second explosion-proof terminal; one end of the first explosion-proof terminal is used to connect the motor power line introduced by the first explosion-proof cable introduction device, and the other end of the first explosion-proof terminal is used to respectively connect the current transformer and the voltage transformer in the transformer box; one end of the second explosion-proof terminal is used to respectively connect the current transformer and the voltage transformer, and the other end of the second explosion-proof terminal is used to connect the second explosion-proof cable introduction device, so as to respectively transmit the secondary side current signal of the current transformer and the secondary side voltage signal of the voltage transformer to the main box through the second explosion-proof cable introduction device; the main box is used to set a monitoring device, wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
[0007] Optionally, the transformer box is formed with a transformer main cavity, and a high-voltage electrical connection cavity and a low-voltage electrical connection cavity respectively connected to the transformer main cavity; the transformer main cavity is used to accommodate the current transformer and the voltage transformer; the first explosion-proof cable introduction device is arranged on the cavity wall of the high-voltage electrical connection cavity to introduce the motor power line; the first flameproof terminal is arranged on the cavity wall where the high-voltage electrical connection cavity and the transformer main cavity are connected, one end is arranged in the high-voltage electrical connection cavity, and the other end is arranged in the transformer main cavity; the second explosion-proof cable introduction device is arranged on the cavity wall of the low-voltage electrical connection cavity, and is used to introduce one end of the current signal line and one end of the voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; the voltage signal line is used to transmit the secondary side voltage signal; the second flameproof terminal is arranged on the cavity wall where the low-voltage electrical connection cavity and the transformer main cavity are connected, one end is arranged in the transformer main cavity, and the other end is arranged in the low-voltage electrical connection cavity.
[0008] Optionally, a third explosion-proof cable introduction device and a third explosion-proof terminal block are provided on the main housing; the third explosion-proof cable introduction device is used to introduce the other end of the current signal line and the other end of the voltage signal line respectively; one end of the third explosion-proof terminal block is used to connect the current signal line and the voltage signal line introduced by the third explosion-proof cable introduction device; the other end of the third explosion-proof terminal block is used to connect the monitoring device.
[0009] Optionally, the host case is formed with a host wiring cavity and a host main cavity; the third explosion-proof cable introduction device is arranged on the cavity wall of the host wiring cavity; the third explosion-proof terminal is arranged on the cavity wall where the host wiring cavity and the host main cavity are connected; the host main cavity is used to set the monitoring device.
[0010] Optionally, the transformer box also includes a front upper cover, a front lower cover and a rear cover; the front upper cover is fixedly connected to the high-voltage electrical connection chamber, and covers the side of the high-voltage electrical connection chamber away from the transformer main chamber; the front lower cover is fixedly connected to the low-voltage electrical connection chamber, and covers the side of the low-voltage electrical connection chamber away from the transformer main chamber; the rear cover is fixedly connected to the transformer main chamber, and covers the side of the transformer main chamber away from the high-voltage electrical connection chamber.
[0011] The second aspect of the utility model provides a mining motor detection device, comprising: a current transformer, a voltage transformer, a monitoring device, and a transformer box and a main box connected to each other; the transformer box is provided with a first explosion-proof cable introduction device, a second explosion-proof cable introduction device, a first explosion-proof terminal and a second explosion-proof terminal; one end of the first explosion-proof terminal is used to connect the motor power line introduced by the first explosion-proof cable introduction device; the other end of the first explosion-proof terminal is respectively connected to the current transformer and the voltage transformer in the transformer box; one end of the second explosion-proof terminal is respectively connected to the current transformer and the voltage transformer, and the other end of the second explosion-proof terminal is used to connect the second explosion-proof cable introduction device, so as to respectively transmit the secondary side current signal of the current transformer and the secondary side voltage signal of the voltage transformer to the main box through the second explosion-proof cable introduction device; a monitoring device is provided in the main box, wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
[0012] Optionally, the transformer box is formed with a transformer main cavity, and a high-voltage electrical connection cavity and a low-voltage electrical connection cavity respectively connected to the transformer main cavity; the transformer main cavity accommodates the current transformer and the voltage transformer; the first explosion-proof cable introduction device is arranged on the cavity wall of the high-voltage electrical connection cavity to introduce the motor power line; the first explosion-proof terminal is arranged on the cavity wall connecting the high-voltage electrical connection cavity and the transformer main cavity, one end of which is arranged in the high-voltage electrical connection cavity, and the other end is arranged in the transformer main cavity, respectively connected to The current transformer is connected to the voltage transformer; the second explosion-proof cable introduction device is arranged on the cavity wall of the low-voltage electrical connection cavity, and is used to introduce one end of the current signal line and one end of the voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; the voltage signal line is used to transmit the secondary side voltage signal; the second explosion-proof terminal is arranged on the cavity wall connecting the low-voltage electrical connection cavity and the transformer main cavity, one end is arranged in the transformer main cavity, and the other end is arranged in the low-voltage electrical connection cavity.
[0013] Optionally, a third explosion-proof cable introduction device and a third explosion-proof terminal block are provided on the main housing; the third explosion-proof cable introduction device introduces the other end of the current signal line and the other end of the voltage signal line respectively; one end of the third explosion-proof terminal block is used to connect the current signal line and the voltage signal line introduced by the third explosion-proof cable introduction device; the other end of the third explosion-proof terminal block is used to connect the monitoring device.
[0014] Optionally, the monitoring device includes: a monitoring unit, a router, a switching power supply, a power indicator light and an intrinsically safe isolation module; the monitoring unit is connected to the other end of the third flameproof terminal, and is used to monitor the motor through the secondary side current signal and the secondary side voltage signal; the router is used to communicate with a host computer; the intrinsically safe isolation module is used to isolate and process the signal output by the router; the switching power supply is respectively connected to the monitoring unit and the router, and is used to power the monitoring unit and the router; the power indicator light is used to indicate the status of the switching power supply.
[0015] Optionally, the main housing is provided with an upper cover; the upper cover is provided with a display window.
[0016] (III) Beneficial effects
[0017] The above technical solution of the utility model has the following beneficial technical effects:
[0018] The explosion-proof device of the utility model accommodates a transformer and a monitoring device respectively through a transformer box and a main box, and adds explosion-proof structures such as a first explosion-proof cable introduction device, a second explosion-proof cable introduction device, a first explosion-proof terminal and a second explosion-proof terminal to prevent the mining motor monitoring device from exploding due to sparks or heat generated during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the explosion-proof device;
[0020] Figure 2 It is a schematic diagram of the main structure of the mutual inductance box;
[0021] Figure 3 It is a left view structural diagram of the mutual inductance box;
[0022] Figure 4 It is a rear view structural diagram of the mutual inductance box;
[0023] Figure 5 It is a right view structural diagram of the mutual inductance box;
[0024] Figure 6 1. It is a schematic diagram of the top view of the mutual inductance box;
[0025] Figure 7 It is a schematic diagram of the top view of the mainframe case;
[0026] Figure 8 It is a schematic diagram of the main structure of the mainframe box;
[0027] Fig. 9 It is a schematic diagram of a partial cross-sectional structure of the mainframe case;
[0028] Fig.10 It is a schematic diagram of the rear view structure of the mainframe case;
[0029] Fig.11 It is an electrical schematic.
[0030] Reference numerals:
[0031] 100: Transformer box; 110: First explosion-proof cable entry device; 120: Second explosion-proof cable entry device; 130: First explosion-proof terminal; 140: Second explosion-proof terminal; 150: High-voltage electrical connection chamber; 160: Low-voltage electrical connection chamber; 170: Transformer main chamber; 181: Front upper cover; 182: Front lower cover; 183: Rear cover; 190: Copper busbar;
[0032] 200: mainframe box; 210: third explosion-proof cable entry device; 220: third explosion-proof terminal block; 230: mainframe wiring cavity; 240: mainframe cavity; 250: upper cover; 251: display window;
[0033] 300: Current transformer;
[0034] 400: voltage transformer;
[0035] 510: monitoring unit; 520: router; 530: switching power supply; 540: power indicator light; 550: circuit breaker; 560: power switch. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0037] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clarity. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.
[0038] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0039] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0040] First embodiment
[0041] See also Figures 1 to 10 The present embodiment provides an explosion-proof device for explosion-proof protection of a mining motor detection device, comprising: a transformer box 100 and a main box 200 connected to each other; a first explosion-proof cable introduction device 110, a second explosion-proof cable introduction device 120, a first explosion-proof terminal 130 and a second explosion-proof terminal 140 are arranged on the transformer box 100; one end of the first explosion-proof terminal 130 is used to connect the motor power line introduced by the first explosion-proof cable introduction device 110, and the other end of the first explosion-proof terminal 130 is used to connect the current transformer in the transformer box 100, The second flameproof terminal block 140 is used to connect the current transformer 300 and the voltage transformer 400 respectively; one end of the second flameproof terminal block 140 is used to connect the current transformer 300 and the voltage transformer 400 respectively, and the other end of the second flameproof terminal block 140 is used to connect the second flameproof cable lead-in device 120, so as to transmit the secondary side current signal of the current transformer 300 and the secondary side voltage signal of the voltage transformer 400 to the main housing 200 through the second flameproof cable lead-in device 120 respectively; the main housing 200 is used to set a monitoring device, wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
[0042] The explosion-proof device of this embodiment accommodates the transformer and the monitoring device respectively through the transformer box 100 and the main box 200, and adds explosion-proof structures such as the first explosion-proof cable introduction device 110, the second explosion-proof cable introduction device 120, the first explosion-proof terminal 130 and the second explosion-proof terminal 140 to prevent the mining motor monitoring device from generating sparks or heat during operation. Explosion-proof structures can prevent the explosion caused by the generation of sparks or heat.
[0043] The design of the transformer box 100 and the main box 200 complies with the relevant provisions of GB / T 3836-2021 electrical equipment for explosive environments, and can be used in mines with explosive hazardous gases without causing explosion risks.
[0044] See also Figures 2 to 6In a specific embodiment, the first explosion-proof cable lead-in device 110 includes 4 B5 type explosion-proof cable lead-ins, and the second explosion-proof cable lead-in device 120 includes 2 A0 type explosion-proof cable lead-ins and 2 A1 type explosion-proof cable lead-ins. The first explosion-proof terminal 130 includes a group of three JP16-6K-Φ75 type explosion-proof terminal blocks and a group of three JP16-6K-Φ75 type explosion-proof terminal blocks, and the second explosion-proof terminal 140 includes a JD9-220 type explosion-proof terminal block. The first explosion-proof cable lead-in device 110 and the first explosion-proof cable lead-in device 110 are composed of a rubber ring, a plug and a gasket. The external high-voltage cable is introduced into the box through the B5 type lead-in device, and the copper bus 190 is hung through the upper group of JP16-6K-Φ75 type explosion-proof terminal blocks, and then the device is led out through the lower group of JP16-6K-Φ75 type explosion-proof terminal blocks. The three-phase electricity drawn from the copper busbar 190 is converted into low voltage through the voltage transformer 400, and the three-phase electricity drawn from the copper busbar 190 is converted into low current collection through the current transformer 300. The voltage and current on the secondary side of the voltage transformer 400 and the current transformer 300 are connected to the main box 200 through the JD9-220 flameproof terminal through the A0 / A1 introduction device.
[0045] See also Figures 2 to 6 In an optional embodiment, the transformer box 100 is formed with a transformer main cavity 170, and a high-voltage electrical connection cavity 150 and a low-voltage electrical connection cavity 160 respectively connected to the transformer main cavity 170; the transformer main cavity 170 is used to accommodate the current transformer 300 and the voltage transformer 400; the first explosion-proof cable introduction device 110 is arranged on the cavity wall of the high-voltage electrical connection cavity 150 to introduce the motor power line; the first flameproof terminal 130 is arranged on the cavity wall where the high-voltage electrical connection cavity 150 and the transformer main cavity 170 are connected, and one end is arranged on the high-voltage electrical connection cavity The second explosion-proof cable introduction device 120 is arranged on the cavity wall of the low-voltage electrical connection cavity 160, and is used to introduce one end of the current signal line and one end of the voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; the voltage signal line is used to transmit the secondary side voltage signal; the second explosion-proof terminal 140 is arranged on the cavity wall connecting the low-voltage electrical connection cavity 160 and the main cavity 170 of the transformer, one end of which is arranged in the main cavity 170 of the transformer, and the other end of which is arranged in the low-voltage electrical connection cavity 160.
[0046] Among them, the three cavities of the transformer main cavity 170, the high-voltage electrical connection cavity 150 and the low-voltage electrical connection cavity 160 are independent of each other, all of which are separated by partitions in the middle and fully welded and sealed to achieve the explosion-proof effect, that is, when an explosion occurs in any cavity, it will not cause explosions in other cavities.
[0047] See also Figures 2 to 6In an optional embodiment, the transformer box 100 further includes a front upper cover 181, a front lower cover 182 and a rear cover 183; the front upper cover 181 is fixedly connected to the high-voltage electrical connection chamber 150 and covers the side of the high-voltage electrical connection chamber 150 away from the transformer main chamber 170; the front lower cover 182 is fixedly connected to the low-voltage electrical connection chamber 160 and covers the side of the low-voltage electrical connection chamber 160 away from the transformer main chamber 170; the rear cover 183 is fixedly connected to the transformer main chamber 170 and covers the side of the transformer main chamber 170 away from the high-voltage electrical connection chamber 150. The front upper cover 181, the front lower cover 182 and the rear cover 183 together with the high-voltage electrical connection chamber 150, the low-voltage electrical connection chamber 160 and the transformer main chamber 170 play an explosion-proof role.
[0048] See also Figures 2 to 6 In a specific embodiment, the front upper cover 181 and the high-voltage electrical connection chamber 150, the front lower cover 182 and the low-voltage electrical connection chamber 160, and the rear cover 183 and the transformer main chamber 170 are fastened by hexagon socket head screws M8*16 and standard elastic washers 8*2.1. There are 4 B5-type explosion-proof cable lead-in devices on both sides of the high-voltage electrical connection chamber 150, two on each side, and there are 2 A0-type explosion-proof cable lead-in devices and 2 A1-type explosion-proof cable lead-in devices on both sides of the low-voltage electrical connection chamber 160. The lead-in device consists of a rubber ring, a plug and a washer. The external high-voltage cable is introduced into the box through the B5-type lead-in device, and the copper bus 190 of the current transformer 300 is hung through a group of JP16-6K-Φ75-type flameproof wiring terminals on the upper side, and then leads out of the device through a group of JP16-6K-Φ75-type flameproof wiring terminals on the lower side. The three-phase electricity drawn from the copper bus 190 is converted into low voltage through the voltage transformer 400, and the voltage and current of the secondary side of the voltage transformer 400 and the current transformer 300 are collected and connected to the main box 200 through the JD9-220 flameproof terminal through the A0 / A1 type introduction device. The number of explosion-proof cable introduction devices and flameproof terminal blocks in this embodiment is only a schematic illustration, and the actual number can be determined according to demand.
[0049] See also Figures 7 to 10 In an optional embodiment, a third explosion-proof cable introduction device 210 and a third explosion-proof terminal 220 are provided on the main chassis 200; the third explosion-proof cable introduction device 210 is used to introduce the other end of the current signal line and the other end of the voltage signal line respectively; one end of the third explosion-proof terminal 220 is used to connect the current signal line and the voltage signal line introduced by the third explosion-proof cable introduction device 210; the other end of the third explosion-proof terminal 220 is used to connect the monitoring device.
[0050] See also Figures 7 to 10In an optional embodiment, in the above embodiment, the host case 200 is formed with a host wiring cavity 230 and a host main cavity 240; the third explosion-proof cable introduction device 210 is arranged on the cavity wall of the host wiring cavity 230; the third explosion-proof terminal 220 is arranged on the cavity wall where the host wiring cavity 230 and the host main cavity 240 are connected; the host main cavity 240 is used to set the monitoring device.
[0051] See also Figures 7 to 10 In a specific embodiment, the mainframe box 200 further includes an upper cover 250 and a junction box cover, and the upper cover 250, the junction box cover and the box body are fastened by hexagon socket head screws M8x16 and standard elastic washers 8x2.1;
[0052] The third explosion-proof cable lead-in device 210 includes two A0-type explosion-proof cable lead-in devices and two A1-type explosion-proof cable lead-in devices, which can introduce power cables, current signal lines and voltage signal lines. The third explosion-proof terminal 220 includes a JD4-220 explosion-proof terminal and a JD9-220 explosion-proof terminal. In addition, the host wiring cavity 230 is also provided with a 4G antenna wall terminal JZ30-220.
[0053] Second embodiment
[0054] See also Figures 1 to 11 The present embodiment provides a mining motor detection device, comprising: a current transformer 300, a voltage transformer 400, a monitoring device, and a transformer box 100 and a main box 200 connected to each other; the transformer box 100 is provided with a first explosion-proof cable introduction device 110, a second explosion-proof cable introduction device 120, a first explosion-proof terminal 130 and a second explosion-proof terminal 140; one end of the first explosion-proof terminal 130 is used to connect the motor power line introduced by the first explosion-proof cable introduction device 110; the other end of the first explosion-proof terminal 130 is respectively connected to the transformer box 100 The current transformer 300 and the voltage transformer 400 are connected in the main body; one end of the second flameproof terminal 140 is connected to the current transformer 300 and the voltage transformer 400 respectively, and the other end of the second flameproof terminal 140 is used to connect the second flameproof cable introduction device 120, so as to transmit the secondary side current signal of the current transformer 300 and the secondary side voltage signal of the voltage transformer 400 to the main body box 200 through the second flameproof cable introduction device 120 respectively; a monitoring device is arranged in the main body box 200, wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
[0055] The mining motor detection device of this embodiment accommodates the transformer and the monitoring device respectively through the transformer box 100 and the main box 200, and adds explosion-proof structures such as the first explosion-proof cable introduction device 110, the second explosion-proof cable introduction device 120, the first explosion-proof terminal 130 and the second explosion-proof terminal 140 to prevent the mining motor monitoring device from generating sparks or heat during operation. Explosion-proof structures can prevent the mining motor monitoring device from exploding due to sparks or heat.
[0056] See also Figures 2 to 6 In an optional embodiment, the transformer box 100 is formed with a transformer main cavity 170, and a high-voltage electrical connection cavity 150 and a low-voltage electrical connection cavity 160 respectively connected to the transformer main cavity 170; the transformer main cavity 170 accommodates a current transformer 300 and a voltage transformer 400; the first explosion-proof cable introduction device 110 is arranged on the cavity wall of the high-voltage electrical connection cavity 150 to introduce the motor power line; the first flameproof terminal 130 is arranged on the cavity wall where the high-voltage electrical connection cavity 150 and the transformer main cavity 170 are connected, one end of which is arranged in the high-voltage electrical connection cavity 150, and the other end is arranged at The second explosion-proof cable introduction device 120 is arranged on the cavity wall of the low-voltage electrical connection cavity 160, and is used to introduce one end of the current signal line and one end of the voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; the voltage signal line is used to transmit the secondary side voltage signal; the second explosion-proof terminal 140 is arranged on the cavity wall connecting the low-voltage electrical connection cavity 160 and the transformer main cavity 170, one end of which is arranged in the transformer main cavity 170, and the other end of which is arranged in the low-voltage electrical connection cavity 160.
[0057] See also Figures 2 to 6 In an optional embodiment, a third explosion-proof cable introduction device 210 and a third explosion-proof terminal 220 are provided on the main chassis 200; the third explosion-proof cable introduction device 210 introduces the other end of the current signal line and the other end of the voltage signal line respectively; one end of the third explosion-proof terminal 220 is used to connect the current signal line and the voltage signal line introduced by the third explosion-proof cable introduction device 210; the other end of the third explosion-proof terminal 220 is used to connect the monitoring device.
[0058] See also Figures 7 to 10In an optional embodiment, the monitoring device includes: a monitoring unit 510, a router 520, a switching power supply 530, a power indicator light 540 and an intrinsically safe isolation module; the monitoring unit 510 is connected to the other end of the third flameproof terminal 220, and is used to monitor the motor through the secondary side current signal and the secondary side voltage signal; the router 520 is used to communicate with the host computer; the intrinsically safe isolation module is used to isolate the signal output by the router 520; the switching power supply 530 is connected to the monitoring unit 510 and the router 520 respectively, and is used to power the monitoring unit 510 and the router 520; the power indicator light is used to indicate the state of the switching power supply 530. The intrinsically safe isolation module specifically performs signal isolation processing on the output 4G signal. An upper cover 250 is provided on the main box 200; and a display window 251 is provided on the upper cover 250. Specifically, the switching power supply 530, the router 520, and the intrinsically safe isolation module are fixed on the bottom plate, and the power indicator light 540, the circuit breaker 550, and the monitoring unit 510 are fixed on the display window 251 of the upper cover 250. The switching power supply 530 is controlled by a power switch 560 .
[0059] In addition, this motor monitoring system does not require the installation of any sensors. It only needs to connect wires to collect voltage / current signals to effectively and accurately analyze the motor's operating status and faults, provide a decision-making basis for motor maintenance planning, extend the motor's service life, and reduce its use cost.
[0060] The monitoring unit 510 uses a model-based fault detection and diagnosis technology. In this technology, the expected dynamic behavior model of the three-phase system is determined and compared with the measured dynamic behavior to monitor anomalies. First, the system is learned for a period of time by acquiring and processing real-time data from the system. The data is processed using a system identification algorithm to calculate the expected dynamic behavior and model parameters. This motor monitoring device uses current harmonic analysis technology and can be connected to a host computer via a network for real-time monitoring, so that the use status is clear at a glance; by collecting voltage / current signals to diagnose motor faults and guide maintenance personnel to handle them, the operation is simple and the results are accurate. The test results can be imported into other platforms and become part of the smart factory.
[0061] See also Figures 7 to 10 In a specific embodiment, the circuit breaker 550 is extended out of the upper cover 250 through a small explosion-proof operating mechanism extension rod, and the monitoring unit 510 is fixed to the glass observation window through a pressure plate and a rubber gasket. The external power supply supplies power to the monitoring unit 510, the switching power supply 530 and the power indicator light 540; the voltage / current signal collected externally is sent to the monitoring unit 510, and the module and the router 520 complete the data transmission through RS422 communication, and then the router 520 communicates with the host computer through the 4G network to monitor the motor status in real time.
[0062] See also Fig.11 In a specific embodiment, X1, X2 and X3 represent three-phase power input, D1, D2 and D3 represent three-phase power output; Ua, Ub and Uc represent three-phase voltage transformer output; TA1, TA2 and TA3 represent three-phase current transformer output. L and N represent power lines.
[0063] In an optional embodiment, a warning message such as "Do not open the cover with power on" may be marked at any one or more of the front upper cover 181, the front lower cover 182, the rear cover 183 and the upper cover 250 to ensure safety. In addition, the rated voltage, working current, explosion-proof mark, current transformer ratio, current transformer accuracy, voltage transformer ratio, voltage transformer accuracy and use yield strength and other information may also be marked at appropriate locations of the transformer box 100 or the host box 200.
[0064] The mining motor detection device of this embodiment replaces the traditional sensor detection and transmits data information, which can effectively avoid interference from noise, environmental conditions and the like on site. The monitoring unit 510 of this system only needs to collect the voltage / current signal flowing into the motor to analyze the electrical signal spectrum. The change of the stator-rotor air gap is reflected in the current of the motor through the air gap flux that affects the electromotive force. Therefore, the current will carry information related to mechanical and electrical faults. Therefore, the fault will show a change in the current spectrum that is obvious at a specific frequency. This monitoring system can provide comprehensive mechanical, electrical and drive system fault coverage, but it only measures voltage and current, which is convenient and efficient. Compared with the existing sensors for vibration measurement and current feature analysis, the accuracy is significantly improved, and they are not affected by the noise or harmonics present in the power supply voltage.
[0065] In addition, the mining motor detection device of this embodiment can perform data analysis on the operating status of the motor through changes in the current spectrum, and by sampling the current, pick out current components related to the operating status characteristics of the motor from the operating current, such as: current vibration components caused by irregular vibrations generated when the bearings are worn; periodic current change components generated when the motor is eccentric, etc., to analyze the operating status of the motor.
[0066] Through long-term online monitoring of the motor, the current operating status of the motor and the operating time of the motor under the same working conditions can be analyzed and judged from the current change characteristics and curves during the operation process. The motor maintenance can be planned and the motor service life can be evaluated and judged. It provides data support and basis for management personnel to make decisions on repairs, maintenance, replacement, etc., and effectively solves the problem that the operating status of the motor cannot be assessed due to inadequate personnel management, and routine maintenance can only be carried out on time, and the problem of over-maintenance and under-maintenance often exists. It can greatly save the investment of manpower and material resources in motor management and effectively reduce management costs.
[0067] The similarities between this embodiment and the first embodiment are not described in detail here.
[0068] The utility model is intended to protect an explosion-proof device and a mining motor detection device, wherein the explosion-proof device comprises: a transformer box 100 and a host box 200 connected to each other; a first explosion-proof cable introduction device 110, a second explosion-proof cable introduction device 120, a first flameproof wiring terminal 130 and a second flameproof wiring terminal 140 are arranged on the transformer box 100; one end of the first flameproof wiring terminal 130 is used to connect the motor power line, and the other end is used to connect The current transformer 300 and the voltage transformer 400 in the transformer box 100; one end of the second flameproof terminal 140 is used to connect the current transformer 300 and the voltage transformer 400 respectively, and the other end is used to connect the second explosion-proof cable introduction device 120, so as to transmit the secondary side current signal of the current transformer 300 and the secondary side voltage signal of the voltage transformer 400 to the main box 200 respectively; the main box 200 is used to set a monitoring device to monitor the mining motor through the secondary side current signal and the secondary side voltage signal. The explosion-proof device can be used in mines with explosive and dangerous gases to effectively prevent the occurrence of explosion risks. The mining motor detection device also has the above-mentioned effect because it includes all the components of the explosion-proof device.
[0069] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. An explosion-proof device, characterized in that: Used for explosion-proof protection of a mining motor detection device, comprising: a mutual inductor box (100) and a main machine box (200) connected to each other; The transformer box (100) is provided with a first explosion-proof cable lead-in device (110), a second explosion-proof cable lead-in device (120), a first explosion-proof wiring terminal (130) and a second explosion-proof wiring terminal (140); One end of the first flameproof terminal (130) is used to connect the motor power line introduced by the first flameproof cable introduction device (110), and the other end of the first flameproof terminal (130) is used to connect the current transformer (300) and the voltage transformer (400) in the transformer box (100) respectively; One end of the second flameproof terminal (140) is used to connect the current transformer (300) and the voltage transformer (400) respectively, and the other end of the second flameproof terminal (140) is used to connect the second flameproof cable lead-in device (120) so as to transmit the secondary side current signal of the current transformer (300) and the secondary side voltage signal of the voltage transformer (400) to the main housing (200) through the second flameproof cable lead-in device (120); The main housing (200) is used to set a monitoring device, wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
2. The explosion-proof device according to claim 1, characterized in that: The transformer box (100) is formed with a transformer main cavity (170), and a high-voltage electrical connection cavity (150) and a low-voltage electrical connection cavity (160) respectively connected to the transformer main cavity (170); The transformer main chamber (170) is used to accommodate the current transformer (300) and the voltage transformer (400); The first explosion-proof cable introduction device (110) is arranged on the cavity wall of the high-voltage electrical connection cavity (150) to introduce the motor power line; The first flameproof terminal (130) is arranged on a cavity wall connecting the high-voltage electrical connection cavity (150) and the transformer main cavity (170), one end of which is arranged in the high-voltage electrical connection cavity (150) and the other end of which is arranged in the transformer main cavity (170); The second explosion-proof cable introduction device (120) is arranged on the cavity wall of the low-voltage electrical connection cavity (160), and is used to introduce one end of a current signal line and one end of a voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; and the voltage signal line is used to transmit the secondary side voltage signal; The second flameproof terminal (140) is arranged on a cavity wall connecting the low-voltage electrical connection cavity (160) and the transformer main cavity (170), with one end arranged in the transformer main cavity (170) and the other end arranged in the low-voltage electrical connection cavity (160).
3. The explosion-proof device according to claim 1 or 2, characterized in that: The main housing (200) is provided with a third explosion-proof cable introduction device (210) and a third explosion-proof wiring terminal (220); The third explosion-proof cable introduction device (210) is used to introduce the other end of the current signal line and the other end of the voltage signal line respectively; One end of the third flameproof wiring terminal (220) is used to connect the current signal line and the voltage signal line introduced by the third flameproof cable introduction device (210); The other end of the third flameproof terminal (220) is used for connecting the monitoring device.
4. The explosion-proof device according to claim 3, characterized in that: The mainframe housing (200) is formed with a mainframe wiring cavity (230) and a mainframe main cavity (240); The third explosion-proof cable introduction device (210) is arranged on the cavity wall of the host wiring cavity (230); The third flameproof terminal (220) is arranged on a cavity wall where the host wiring cavity (230) and the host main cavity (240) are connected; The main chamber (240) of the host is used to set the monitoring device.
5. The explosion-proof device according to claim 2, characterized in that: The transformer box (100) further comprises a front upper cover (181), a front lower cover (182) and a rear cover (183); The front upper cover (181) is fixedly connected to the high-voltage electrical connection chamber (150), and covers a side of the high-voltage electrical connection chamber (150) away from the transformer main chamber (170); The front lower cover (182) is fixedly connected to the low-voltage electrical connection chamber (160), and covers a side of the low-voltage electrical connection chamber (160) away from the transformer main chamber (170); The rear cover (183) is fixedly connected to the transformer main cavity (170), and covers the side of the transformer main cavity (170) away from the high-voltage electrical connection cavity (150).
6. A mining motor detection device, characterized in that: include: A current transformer (300), a voltage transformer (400), a monitoring device, and a transformer housing (100) and a main housing (200) connected to each other; The transformer box (100) is provided with a first explosion-proof cable lead-in device (110), a second explosion-proof cable lead-in device (120), a first explosion-proof wiring terminal (130) and a second explosion-proof wiring terminal (140); One end of the first flameproof terminal (130) is used to connect the motor power line introduced by the first flameproof cable introduction device (110); The other end of the first flameproof terminal (130) is respectively connected to the current transformer (300) and the voltage transformer (400) in the transformer box (100); One end of the second flameproof terminal (140) is connected to the current transformer (300) and the voltage transformer (400), respectively, and the other end of the second flameproof terminal (140) is used to connect to the second flameproof cable lead-in device (120), so as to transmit the secondary side current signal of the current transformer (300) and the secondary side voltage signal of the voltage transformer (400) to the main housing (200) through the second flameproof cable lead-in device (120); A monitoring device is arranged in the main housing (200), wherein the monitoring device is used to monitor the mining motor through the secondary side current signal and the secondary side voltage signal.
7. The mining motor detection device according to claim 6, characterized in that: The transformer box (100) is formed with a transformer main cavity (170), and a high-voltage electrical connection cavity (150) and a low-voltage electrical connection cavity (160) respectively connected to the transformer main cavity (170); The transformer main chamber (170) accommodates the current transformer (300) and the voltage transformer (400); The first explosion-proof cable introduction device (110) is arranged on the cavity wall of the high-voltage electrical connection cavity (150) to introduce the motor power line; The first flameproof terminal (130) is arranged on a cavity wall connecting the high-voltage electrical connection cavity (150) and the transformer main cavity (170), one end of which is arranged in the high-voltage electrical connection cavity (150) and the other end of which is arranged in the transformer main cavity (170), and is respectively connected to the current transformer (300) and the voltage transformer (400); The second explosion-proof cable introduction device (120) is arranged on the cavity wall of the low-voltage electrical connection cavity (160), and is used to introduce one end of a current signal line and one end of a voltage signal line respectively, wherein the current signal line is used to transmit the secondary side current signal; and the voltage signal line is used to transmit the secondary side voltage signal; The second flameproof terminal (140) is arranged on a cavity wall connecting the low-voltage electrical connection cavity (160) and the transformer main cavity (170), with one end arranged in the transformer main cavity (170) and the other end arranged in the low-voltage electrical connection cavity (160).
8. The mining motor detection device according to claim 6, characterized in that: The main housing (200) is provided with a third explosion-proof cable introduction device (210) and a third explosion-proof wiring terminal (220); The third explosion-proof cable introduction device (210) introduces the other end of the current signal line and the other end of the voltage signal line respectively; One end of the third flameproof wiring terminal (220) is used to connect the current signal line and the voltage signal line introduced by the third flameproof cable introduction device (210); The other end of the third flameproof terminal (220) is used for connecting the monitoring device.
9. The mining motor detection device according to claim 8, characterized in that: The monitoring device comprises: a monitoring unit (510), a router (520), a switching power supply (530), a power indicator light (540) and an intrinsically safe isolation module; The monitoring unit (510) is connected to the other end of the third flameproof terminal (220) and is used to monitor the motor through the secondary side current signal and the secondary side voltage signal; The router (520) is used to communicate with the host computer; The intrinsically safe isolation module is used to isolate the signal output by the router (520); The switch power supply (530) is connected to the monitoring unit (510) and the router (520) respectively, and is used to supply power to the monitoring unit (510) and the router (520); The power indicator light (540) is used to indicate the state of the switching power supply (530).
10. The mining motor detection device according to claim 9, characterized in that: The mainframe housing (200) is provided with an upper cover (250); The upper cover (250) is provided with a display window (251).