Explosion-proof electric energy quality analyzer

Abstract

The utility model relates to an explosion-proof electric energy quality analyzer, which comprises an explosion-proof shell, an electric energy quality analyzer assembly, a front door assembly, a wiring cavity cover plate assembly and a wire fixing bracket, and is characterized in that A2 and A3 type horn mouth lead devices are arranged on a shell frame; the electric energy quality analyzer assembly is composed of an electric energy quality analyzer installation plate, an electric energy quality analyzer, a switching power supply, a pulse train suppressor, a circuit breaker, an RS485 isolation gate, an Ethernet isolation gate and a metal keyboard isolation plate. 220V alternating current is connected to the input ends of the switching power supply, the intrinsic safety power supply and the electric energy quality analyzer through the circuit breaker and the pulse train suppressor in sequence. According to the explosion-proof electric energy quality analyzer, electric energy quality parameters are observed through the transparent observation window, the parameters are adjusted by means of the metal keyboard, the explosion-proof electric energy quality analyzer is connected with an external power grid through the A2 and A3 horn mouth lead devices, and signal transmission is realized by adopting 485 and Ethernet isolated gates, so that power grid quality detection in a coal mine environment is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of explosion-proof electric energy quality analyzers, more specifically, especially a kind of explosion-proof electric energy quality analyzer. BACKGROUND

[0002] With the rapid development of coal mine underground power electronic equipment, the wide use of frequency conversion, rectification, inversion, AC voltage regulation and other nonlinear loads, power load increases sharply, especially the growing capacity of impact and nonlinear load, makes the power grid harmonic pollution occurs waveform distortion, voltage fluctuation and flicker and three-phase unbalance and other power quality problems, brings great influence and threat to underground power supply quality and safety, and simultaneously brings great damage to coal mine safety production.

[0003] Current underground power supply system cannot be monitored in real time, cannot search the real-time situation of power index during historical fault, especially the fault caused by harmonic, cannot accurately analyze and judge fault position and reason, thus cannot completely solve the problem, leave safety production hidden danger. How to test the related data of coal mine underground power grid provides the selection basis reference for subsequent treatment, it is a problem that needs to be solved urgently. Therefore, it is necessary to study explosion-proof electric energy quality analyzer to meet the relevant needs. SUMMARY

[0004] The utility model discloses in order to overcome the shortcoming of above-mentioned technical problem, provide a kind of explosion-proof electric energy quality analyzer.

[0005] The explosion-proof electric energy quality analyzer of the utility model, including explosion-proof shell, electric energy quality analyzer component, front door component, wiring cavity cover plate component and fixed line support, electric energy analyzer component is set in the internal cavity of explosion-proof shell, explosion-proof shell is by shell frame and is set on the front door hinge, rear door and rear door hinge of shell frame, shell frame is provided with wiring cavity and recessed cavity;Front door component is by front door, be set on the transparent observation window of front door, be set on the metal keyboard of front door and be set on the intrinsic safety power supply of the inner surface of front door, metal keyboard isolation board installation straight board, front door metal keyboard isolation board and front door explosion-proof terminal constitute;Front door and rear door are hinged on shell frame by front door hinge, rear door hinge respectively;Its characterized in that: recessed cavity place of shell frame is provided with multiple A2 type horn mouth lead device and A3 type horn mouth lead device, which introduces the power of 220V alternating current and the PT / CT signal of the underground power grid to be monitored, and the explosion-proof low-voltage wiring terminal and explosion-proof optical fiber terminal for respectively communicating with the outside RS485 and Ethernet communication are provided on the shell frame at wiring cavity place;

[0006] The power quality analyzer assembly is composed of a power quality analyzer mounting plate, a power quality analyzer, a switching power supply, a pulse group suppressor, a circuit breaker, an RS485 isolation grid, an Ethernet isolation grid and a metal keyboard isolation plate arranged on the power quality analyzer mounting plate, a transparent observation window on the front door is aligned with a display screen on the power quality analyzer, 220V AC power input from outside is sequentially connected to the input end of the switching power supply, the intrinsically safe power supply and the power quality analyzer through the circuit breaker and the pulse group suppressor, the keys on the power quality analyzer are connected with the metal keys through the front door metal keyboard isolation plate and the front door explosion-proof terminal, and the explosion-proof low-voltage wiring terminal and the explosion-proof optical fiber terminal are connected with the power quality analyzer through the RS485 isolation grid and the Ethernet isolation grid.

[0007] The explosion-proof power quality analyzer has the advantages that the contact surfaces of the front door and the rear door with the shell frame are explosion-proof contact surfaces.

[0008] The explosion-proof power quality analyzer has the advantages that the bottom of the power quality analyzer mounting plate is provided with two analyzer metal guide rails, and the upper part is provided with one analyzer metal guide rail, the circuit breaker, the RS485 isolation grid and the Ethernet isolation grid are fixed on the one analyzer metal guide rail at the bottom, the other analyzer metal guide rail at the bottom is fixed with a PT terminal and a terminal fixing piece, and the one analyzer metal guide rail at the upper part is fixed with a PT terminal and a terminal fixing piece.

[0009] The explosion-proof power quality analyzer has the advantages that the transparent observation window is composed of an observation window glass, an observation window copper pad, an observation window cover plate and an observation window rubber pad, the observation window copper pad is arranged between the observation window glass and the front door, the observation window cover plate is arranged on the inner side of the observation window glass, and the observation window rubber pad is located between the observation window cover plate and the observation window glass.

[0010] The explosion-proof power quality analyzer has the advantages that the wiring cavity cover plate assembly is arranged on the outer side of the wiring cavity, a plurality of waterproof connectors and external network interfaces are arranged on the wiring cavity cover plate assembly, the RS485 and Ethernet cables connected with the explosion-proof low-voltage wiring terminal and the explosion-proof optical fiber terminal are penetrated through the waterproof connectors and the external network interfaces.

[0011] The explosion-proof power quality analyzer has the advantages that the wire fixing support is fixed on the power quality analyzer mounting plate, a plurality of cable tie buckles are punched on the wire fixing support, and the side surface and the back of the power quality analyzer mounting plate are punched with cable tie buckles.

[0012] The explosion-proof power quality analyzer has the advantages that the shell frame is fixed with a lifting ring.

[0013] The utility model discloses an advantageous effect is: the utility model discloses the explosion -proof electric energy quality analyzer, by explosion -proof casing, electric energy quality analyzer subassembly, front door subassembly, wiring cavity cover plate subassembly and fixed line support constitute, be provided with front door subassembly, back door, A2 and A3 type loudspeaker mouth lead device, explosion -proof low -voltage wiring terminal and explosion -proof optical fiber terminal on the explosion -proof casing, be provided with transparent observation window, metal keyboard, front door metal keyboard isolation board and switching power supply on the front door subassembly, be provided with electric energy quality analyzer, switching power supply, pulse suppressor, circuit breaker, RS485 isolation grid and ethernet isolation grid in electric energy quality analyzer subassembly, in this way, the 220V alternating current of outside input and the PT / CT (voltage transformer and current transformer) signal of the electric network of the well to be monitored is introduced through A2 and A3 type loudspeaker mouth lead device, 220V alternating current is connected to switching power supply, intrinsically safe power supply and the input of electric energy quality analyzer through circuit breaker, pulse group suppressor, in order to power supply for electric energy quality analyzer, metal keyboard isolation board and front door metal keyboard isolation board, PT / CT signal of electric network is accessed to electric energy quality analyzer, and the keyboard on electric energy quality analyzer is connected through front door explosion -proof terminal, front door metal keyboard isolation board and metal keyboard, to realize the control of electric energy quality analyzer through metal keyboard, and electric energy quality analyzer is communicated through RS485 isolation grid, ethernet isolation grid and explosion -proof low -voltage wiring terminal and explosion -proof optical fiber terminal to realize signal upload or receiving control signal.

[0014] It can be seen that the transparent observation window of the front door subassembly can clearly observe the parameters of electric energy quality analysis, the related parameters can be adjusted by the metal keyboard, the wires of the external electric network are connected through the A2 and A3 loudspeaker mouth lead device, the 485 isolation grid and the ethernet isolation grid can effectively realize high-quality signal transmission, the pulse suppressor is used to provide high-quality electric energy for the electric energy quality analyzer, so that the electric energy quality analyzer can detect the quality of the electric network in the coal mine environment.

[0015] Further, the RS485 and ethernet communication are connected with the outside world through the isolation grid, the explosion -proof low -voltage wiring terminal and the explosion -proof optical fiber terminal, the metal keyboard is connected with the front door metal keyboard isolation board through the front door explosion -proof terminal, and the contact surfaces of the front door and the back door and the shell frame are all explosion -proof surfaces, so that the sparks generated in the whole electric energy quality analyzer will not be transmitted to the outside, and the electric energy quality analyzer has the "explosion -proof" performance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view of the explosion -proof electric energy quality analyzer of the utility model;

[0017] Figure 2 It is the back view of the explosion -proof electric energy quality analyzer of the utility model;

[0018] Figure 3It is the front view of the explosion-proof shell in the utility model;

[0019] Figure 4 It is the front view of the explosion-proof shell in the utility model;

[0020] Figure 5 It is the right view of the explosion-proof shell in the utility model;

[0021] Figure 6 It is the front view of the power quality analyzer assembly in the utility model;

[0022] Figure 7 It is the right view of the power quality analyzer assembly in the utility model;

[0023] Figure 8 It is the rear view of the power quality analyzer assembly in the utility model;

[0024] Figure 9 It is the front view of the front door assembly in the utility model;

[0025] Figure 10 It is the rear view of the front door assembly in the utility model;

[0026] Figure 11 It is the sectional view of the transparent observation window part in the front door assembly in the utility model;

[0027] Figure 12 It is the structural schematic view of the wiring cavity cover plate assembly in the utility model;

[0028] Figure 13 It is the structural schematic view of the wire fixing support in the utility model.

[0029] In the figure: 1 explosion-proof shell, 2 power quality analyzer assembly, 3 front door assembly, 4 wiring cavity cover plate assembly, 5 wire fixing support, 6 cable tie buckle; 101 shell frame, 102 lifting ring, 103 front door hinge, 104 A2 type horn mouth lead device, 105 A3 type horn mouth lead device, 106 rear door, 107 rear door hinge, 108 explosion-proof low-voltage wiring terminal, 109 explosion-proof optical fiber terminal, 110 wiring cavity, 111 recessed cavity, 201 power quality analyzer mounting plate, 202 power quality analyzer, 203 switching power supply, 204 PT terminal, 205 pulse group suppressor, 206 circuit breaker, 207 RS485 isolation grid, 208 Ethernet isolation grid, 209 terminal fixing piece, 210 analyzer metal guide rail, 211 metal keyboard isolation plate; 301 front door, 302 intrinsic safety power supply, 303 metal keyboard isolation plate mounting plate straight plate, 304 front door metal keyboard isolation plate, 305 observation window cover plate, 306 front door explosion-proof terminal, 307 front door metal guide rail, 308 metal keyboard, 309 observation window copper pad, 310 observation window glass, 311 observation window rubber pad, 401 wiring cavity cover plate, 402 waterproof joint, 403 external network interface. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and examples.

[0031] As Figure 1 , Figure 2 The front view and the rear view of the explosion-proof power quality analyzer of the utility model are respectively shown, the explosion-proof power quality analyzer shown is composed of the explosion-proof shell 1, the power quality analyzer 2, the front door assembly 3, the wiring cavity cover plate assembly 4 and the wire fixing support 5, the explosion-proof shell 1 has the protection support and the explosion-proof effect, the power quality analyzer assembly 2 is arranged in the internal cavity of the explosion-proof shell 1, the power quality analyzer assembly 2 is used for monitoring the power grid quality signal of the underground power grid, and the signal of monitoring is displayed. Through the front door assembly 3, not only the power quality analyzer 202 in the power quality analyzer assembly 2 can be controlled by the button, but also the monitored power grid quality signal can be observed through the transparent observation window.

[0032] As Figure 3 , Figure 4 and Figure 5As shown in the utility model, the explosion-proof shell is composed of a shell frame 101, a lifting ring 102, a front door hinge 103, an A2 horn mouth lead device 104, an A3 horn mouth lead device 105, a back door 106, a back door hinge 107, an explosion-proof low-voltage wiring terminal 108 and an explosion-proof optical fiber terminal 109, the rear part of the shell frame 101 is provided with a recessed cavity 111, and one side of the shell frame 101 is provided with a wiring cavity 110.

[0033] As shown in the utility model, the explosion-proof shell is composed of a shell frame 101, a lifting ring 102, a front door hinge 103, an A2 horn mouth lead device 104, an A3 horn mouth lead device 105, a back door 106, a back door hinge 107, an explosion-proof low-voltage wiring terminal 108 and an explosion-proof optical fiber terminal 109, the rear part of the shell frame 101 is provided with a recessed cavity 111, and one side of the shell frame 101 is provided with a wiring cavity 110. Figure 6 、 Figure 7 and Figure 8 As shown in the utility model, the explosion-proof shell is composed of a shell frame 101, a lifting ring 102, a front door hinge 103, an A2 horn mouth lead device 104, an A3 horn mouth lead device 105, a back door 106, a back door hinge 107, an explosion-proof low-voltage wiring terminal 108 and an explosion-proof optical fiber terminal 109, the rear part of the shell frame 101 is provided with a recessed cavity 111, and one side of the shell frame 101 is provided with a wiring cavity 110. Figure 6 、 Figure 7 and Figure 8 As shown in the utility model, the explosion-proof shell is composed of a shell frame 101, a lifting ring 102, a front door hinge 103, an A2 horn mouth lead device 104, an A3 horn mouth lead device 105, a back door 106, a back door hinge 107, an explosion-proof low-voltage wiring terminal 108 and an explosion-proof optical fiber terminal 109, the rear part of the shell frame 101 is provided with a recessed cavity 111, and one side of the shell frame 101 is provided with a wiring cavity 110.

[0034] As shown in the utility model, the explosion-proof shell is composed of a shell frame 101, a lifting ring 102, a front door hinge 103, an A2 horn mouth lead device 104, an A3 horn mouth lead device 105, a back door 106, a back door hinge 107, an explosion-proof low-voltage wiring terminal 108 and an explosion-proof optical fiber terminal 109, the rear part of the shell frame 101 is provided with a recessed cavity 111, and one side of the shell frame 101 is provided with a wiring cavity 110.Figure 9 and Figure 10 As shown in the front view and the rear view of the front door assembly in the utility model respectively, Figure 11 As shown in the front view and the rear view of the front door assembly in the utility model respectively, As shown in the front view and the rear view of the front door assembly in the utility model respectively,

[0035] As shown in the front view and the rear view of the front door assembly in the utility model respectively, As shown in the front view and the rear view of the front door assembly in the utility model respectively,

[0036] As shown in the front view and the rear view of the front door assembly in the utility model respectively, Figure 12 As shown in the front view and the rear view of the front door assembly in the utility model respectively, As shown in the front view and the rear view of the front door assembly in the utility model respectively,

[0037] As shown in the front view and the rear view of the front door assembly in the utility model respectively, As shown in the front view and the rear view of the front door assembly in the utility model respectively,

[0038] The metal guide rail 210 is installed on the side wall and the bottom of the power quality analyzer mounting plate 201, one on the side wall and two on the bottom, the metal guide rail 210 on the side wall is installed with the PT terminal 204 and uniformly distributed five, the metal guide rail 210 on the bottom rear end is installed with the PT terminal 204 and uniformly distributed five, the 485 isolation grid 207 is uniformly distributed on the metal guide rail 210, the Ethernet isolation grid 208 is uniformly distributed on the metal guide rail 210, and the terminal fixing part 209 is fixed at both ends of the metal guide rail 210.

[0039] The waterproof joint 402 is uniformly distributed four, and the outer network interface 403 is uniformly distributed two. Figure 13 As shown in the structure diagram of the wire fixing support in the utility model, the power quality analyzer mounting plate 201 is punched with a cable tie buckle on the side plate and the rear plate.

[0040] The explosion-proof power quality analyzer, when working, connects the external 220V control power line to the inside of the explosion-proof shell 1 through the A3 horn mouth lead device 105, and then connects to one end of the PT terminal 204 at the rear end of the power quality analyzer mounting plate 201, the other end of the PT terminal 204 is connected to the circuit breaker 206, the circuit breaker 206 is connected to the pulse group suppressor 205, the pulse group suppressor 205 is connected to the switching power supply 203, the power quality analyzer 202 and the intrinsic safety power supply 302, respectively, to supply power to the power quality analyzer 202, the metal keyboard isolation plate 211 and the front door metal keyboard isolation plate 304, connect the keys of the power quality analyzer 202 to the front door metal keyboard isolation plate 304, then to the front door explosion-proof terminal 306, and then to the external metal keyboard 308, to realize the control of the power quality analyzer 202, connect the external signal line to the internal 485 isolation grid 207 and the Ethernet isolation grid 208 through the explosion-proof low-voltage terminal 108 and the explosion-proof optical fiber terminal 109, and then connect to the power quality analyzer 202 to realize the signal transmission of the power quality analyzer 202, connect the external PT / CT signal to the inside of the explosion-proof shell 1 through the A2 horn mouth lead device 104 and the A3 horn mouth lead device 105, and then connect to the power quality analyzer 202 through the wire fixing support 5, to realize the detection of the power grid operation quality, and the design of the explosion-proof shell 1 and the front door assembly 301 realizes that the power quality analyzer can realize the real-time detection of the power grid operation quality in the coal mine.

Claims

1. An explosion-proof power quality analyzer, comprising an explosion-proof shell (1), a power quality analyzer assembly (2), a front door assembly (3), a wiring cavity cover plate assembly (4) and a wire fixing support (5), the power quality analyzer assembly is arranged in the internal cavity of the explosion-proof shell, the explosion-proof shell is composed of a shell frame (101), a front door hinge (103), a rear door (106) and a rear door hinge (107) arranged on the shell frame, the shell frame is provided with a wiring cavity (110) and a recess cavity (111); the front door assembly is composed of a front door (301), a transparent observation window arranged on the front door, a metal keyboard (308) arranged on the front door, and an intrinsically safe power supply (302), a metal keyboard isolation plate mounting straight plate (303), a front door metal keyboard isolation plate (304) and a front door explosion-proof terminal (306) arranged on the inner surface of the front door; the front door and the rear door are respectively hinged to the shell frame through the front door hinge and the rear door hinge; characterized in that: A2 type horn mouth lead device (104) and A3 type horn mouth lead device (105) are arranged on the shell frame at the recessed cavity to introduce 220V alternating power and PT / CT signals of the underground power grid to be monitored, and explosion-proof low-voltage wiring terminal (108) and explosion-proof optical fiber terminal (109) are arranged on the shell frame at the wiring cavity to respectively communicate with the outside through RS485 and Ethernet. The front door metal keyboard isolation plate, the front door explosion-proof terminal and the metal key are connected in sequence, the explosion-proof low-voltage wiring terminal and the explosion-proof optical fiber terminal are connected with the power quality analyzer through the RS485 isolation grid and the Ethernet isolation grid respectively.

2. The explosion-proof power quality analyzer of claim 1, wherein: The contact surfaces of the front door (3) and the rear door (106) with the shell frame (101) are explosion-proof contact surfaces.

3. An intrinsically safe power quality analyzer according to claim 1 or 2, characterized in that: The bottom of the power quality analyzer mounting plate is provided with two analyzer metal rails (210), and the upper part is provided with one analyzer metal rail, the circuit breaker (206), the RS485 isolation grid (207) and the Ethernet isolation grid (208) are fixed on the one analyzer metal rail at the bottom, the other analyzer metal rail at the bottom is fixed with a PT terminal (204) and a terminal fixing part (29), and the upper analyzer metal rail is fixed with a PT terminal and a terminal fixing part; the inner surface of the front door (301) is fixed with a front door metal rail (307), and the intrinsically safe power supply (302) is fixed on the front door metal rail.

4. The explosion-proof power quality analyzer according to claim 1 or 2, characterized in that: The transparent observation window is composed of an observation window glass (310), an observation window copper pad (309), an observation window cover plate (305) and an observation window rubber pad (311), the observation window copper pad is arranged between the observation window glass and the front door, the observation window cover plate is arranged on the inner side of the observation window glass, and the observation window rubber pad is located between the observation window cover plate and the observation glass.

5. The explosion-proof power quality analyzer according to claim 1 or 2, characterized in that: The wiring cavity cover plate assembly (4) is arranged outside the wiring cavity (110), and a plurality of waterproof joints (402) and external network interfaces (403) are arranged on the wiring cavity cover plate assembly, and the RS485 and Ethernet cables connected with the explosion-proof low-voltage wiring terminal (108) and the explosion-proof optical fiber terminal (109) are inserted through the waterproof joints and the external network interfaces.

6. The explosion-proof power quality analyzer of claim 1 or 2, characterized in that: The solid wire support (5) is fixed on the power quality analyzer mounting plate (201), and a plurality of cable ties (6) are punched on the solid wire support; the side and the back of the power quality analyzer mounting plate are punched with cable ties.

7. The explosion-proof power quality analyzer of claim 1 or 2, characterized in that: The upper surface of the shell frame (101) is fixed with a lifting ring (102).

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