Explosion-proof mine heading machine multi-protection electric control box

Abstract

The utility model relates to the technical field of mining explosion -proof electrical equipment, concretely is a kind of explosion -proof mining heading machine multi-protection electric cabinet, including main control component, and main control component includes box, and the top of box is fixedly installed with wiring assembly, and wiring assembly includes junction box, cable terminal block, incoming and outgoing line control horn mouth and terminal;Cable terminal block and incoming and outgoing line control horn mouth are respectively installed in the left and right sides of junction box, and terminal is installed on the back of junction box equidistantly, and electric cabinet door lock mechanism is installed on the side surface of box.The utility model adopts explosion -proof structure and IP65 protection level to meet GB3836.2 standard, can be used in IIB class T4 group explosive environment;Through power-off interlocking mechanism, the door opening misoperation rate is reduced to zero, and the equipment life is improved by more than 30% with shock absorption design;Integrated wiring and fault display function make maintenance time shorten 50%, and the working temperature range of-40 DEG C to+60 DEG C adapts to complex working conditions in pit.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof electrical equipment for mining, specifically a multi-protection electrical control box for explosion-proof mining tunneling machines. Background Technology

[0002] The underground tunneling environment in coal mines contains explosive media such as methane and coal dust, accompanied by strong vibrations and impacts, placing stringent requirements on the explosion-proof performance, structural stability, and safety protection of electrical control equipment. Existing tunneling machine electrical control boxes have the following shortcomings: First, the door lock and power supply lack reliable interlocking, making it easy for accidental operation to lead to energized door opening and potential explosion risks; second, the wiring is chaotic and the sealing performance is poor, allowing dust and moisture intrusion to easily cause short circuits; third, the protection functions are limited, only providing basic overload protection and lacking critical protections such as methane monitoring and temperature warnings; fourth, the vibration resistance is insufficient, and components are prone to loosening and failure during equipment operation. Therefore, a multi-protection electrical control box for explosion-proof mining tunneling machines is proposed. Utility Model Content

[0003] In view of this, the present invention provides an explosion-proof multi-protection electrical control box for mining tunneling machines, which aims to solve one of the technical problems of insufficient explosion-proof performance, single protection, and dangerous operation of electrical control boxes in the prior art.

[0004] The technical solution of this utility model embodiment is implemented as follows: A multi-protection electrical control box for an explosion-proof mining tunneling machine includes a main control component. The main control component includes a box body, which is welded from cold-rolled steel plate with a thickness of ≥1.2mm and has a labyrinth-type sealing structure at the joints. A wiring assembly is fixedly installed on the top of the box body. The wiring assembly includes a wiring box, a cable junction box, an inlet / outlet control horn, and wiring terminals. Cable junction boxes and inlet / outlet control horns are respectively installed on the left and right sides of the wiring box. Wiring terminals are equidistantly installed on the back of the wiring box. An electrical control box door lock mechanism is installed on one side of the box body. A main circuit breaker is provided inside the box body, and the auxiliary contacts of the main circuit breaker form a pilot circuit interlock with the electrical control box door lock mechanism.

[0005] A further preferred embodiment: shock-absorbing pads are symmetrically installed at the four corners of the two side walls of the housing. The shock-absorbing pads are made of oil-resistant rubber with a Shore hardness of 70-80 degrees and a thickness of 20-30mm.

[0006] A further preferred embodiment: symmetrical doors are hinged to one end of the front of the enclosure via pins, and the doors are connected to the door lock mechanism of the electrical control box; the mating surface between the door and the enclosure is embedded with an oil-resistant and aging-resistant silicone sealing ring, achieving an IP65 protection level.

[0007] A further preferred embodiment: box handles are installed on both side walls of the box body, and a box door handle is installed on the front of the box door; both the box body handles and the box door handles are made of stainless steel and the surface is treated with anti-corrosion.

[0008] A further preferred embodiment: a display screen is embedded in the front of the enclosure door, and control buttons are installed below the display screen; the display screen is an explosion-proof touch screen that can display current, temperature and fault information in real time, with a response time of ≤0.5 seconds.

[0009] A further preferred embodiment: the electrical control box door lock mechanism includes a spring lock rod, an operating handle, and a limiting arc plate; the left and right sides of the operating handle are respectively connected to the spring lock rod and the limiting arc plate; the extension stroke of the spring lock rod is 15-20mm, and the rotation angle range of the limiting arc plate is limited to 0-90°.

[0010] A further preferred embodiment: a traction assembly is installed on one side wall of the housing, the traction assembly includes a connecting terminal, a chain and a pipe clamp hanger, the upper and lower ends of the chain are respectively connected to the connecting terminal and the pipe clamp hanger; the chain is a lifting-grade stainless steel chain with a rated load ≥ 500 kg.

[0011] A further preferred embodiment: the housing integrates a PLC controller, which is connected to a temperature sensor, a gas concentration detector, and an overload protection module; when the gas concentration is ≥1.0%CH4, an audible and visual alarm is triggered, and when it is ≥1.5%CH4, the main power supply is cut off.

[0012] This utility model has the following beneficial effects: 1. This utility model adopts an explosion-proof structure and meets the GB3836.2 standard with an IP65 protection level, and can be used in Class IIB, Group T4 explosive atmospheres; 2. This utility model reduces the door opening misoperation rate to zero through a power failure interlock mechanism, and improves the equipment life by more than 30% with the shock absorption design; 3. This utility model integrates wiring and fault display functions, which shortens maintenance time by 50%, and its working temperature range of -40℃ to +60℃ is suitable for complex downhole working conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a left-side structural view of the present invention; Figure 3 This is a rear view structural diagram of the present invention; Figure 4 This is a top view of the structure of this utility model; Figure 5 This is a side view of the structure of this utility model.

[0015] Figure label: 10. Main control component; 101. Cabinet; 102. Shock-absorbing pad; 103. Cabinet handle; 104. Pin; 105. Cabinet door; 106. Cabinet door handle; 107. Display screen; 108. Control buttons; 20. Electrical control box door lock mechanism; 201. Spring lock rod; 202. Operating handle; 203. Limiting arc plate; 30. Wiring assembly; 301. Junction box; 302. Cable junction box; 303. Inlet / outlet control horn; 304. Terminal block; 40. Traction assembly; 401. Connecting terminal; 402. Chain; 403. Pipe clamp hanger. Detailed Implementation

[0016] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive. Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] Example 1 like Figures 1-5 As shown, this utility model embodiment provides a multi-protection electrical control box for an explosion-proof mining tunneling machine, including a main control component 10. The main control component 10 includes a box body 101, which is welded from cold-rolled steel plate with a thickness of ≥1.2mm and has a labyrinth-type sealing structure at the joints. A wiring assembly 30 is fixedly installed on the top of the box body 101. The wiring assembly 30 includes a wiring box 301, a cable junction box 302, an inlet / outlet control horn port 303, and wiring terminals 304. The cable junction box 302 and the inlet / outlet control horn port 303 are respectively installed on the left and right sides of the wiring box 301. Wiring terminals 304 are equidistantly installed on the back of the wiring box 301. An electrical control box door lock mechanism 20 is installed on one side of the box body 101. A main circuit breaker is provided inside the box body 101, and the auxiliary contacts of the main circuit breaker form a pilot circuit interlock with the electrical control box door lock mechanism 20.

[0018] In this embodiment, specifically: shock-absorbing pads 102 are symmetrically installed at the four corners of the two side walls of the housing 101. The shock-absorbing pads 102 are made of oil-resistant rubber with a Shore hardness of 70-80 degrees and a thickness of 20-30mm.

[0019] In this embodiment, specifically: a box door 105 is symmetrically hinged to one end of the front of the box body 101 via a pin 104, and the box door 105 is connected to the door lock mechanism 20 of the electrical control box; an oil-resistant and aging-resistant silicone sealing ring is embedded in the mating surface between the box door 105 and the box body 101, and the protection level reaches IP65.

[0020] In this embodiment, specifically: box handles 103 are installed on both side walls of the box body 101, and box door handles 106 are installed on the front of the box door 105; both the box handles 103 and the box door handles 106 are made of 304 stainless steel and the surface is treated with anti-corrosion.

[0021] In this embodiment, specifically: a display screen 107 is embedded in the front of the door 105, and a control button 108 is installed below the display screen 107; the display screen 107 is an explosion-proof touch screen that can display current, temperature and fault information in real time, with a response time of ≤0.5 seconds.

[0022] In this embodiment, specifically: the electrical control box door lock mechanism 20 includes a spring lock rod 201, an operating handle 202, and a limiting arc plate 203. The left and right sides of the operating handle 202 are respectively connected to the spring lock rod 201 and the limiting arc plate 203; the extension stroke of the spring lock rod 201 is 15-20mm, and the rotation angle range of the limiting arc plate 203 is limited to 0-90°.

[0023] In this embodiment, specifically: a traction assembly 40 is installed on one side wall of the housing 101. The traction assembly 40 includes a connecting terminal 401, a chain 402, and a pipe clamp hanger 403. The upper and lower ends of the chain 402 are respectively connected to the connecting terminal 401 and the pipe clamp hanger 403. The chain 402 is a lifting-grade stainless steel chain with a rated load ≥ 500 kg.

[0024] In this embodiment, specifically: the housing 101 integrates a PLC controller, which is connected to a temperature sensor, a gas concentration detector, and an overload protection module; when the gas concentration is ≥1.0%CH4, an audible and visual alarm is triggered, and when it is ≥1.5%CH4, the main power supply is cut off.

[0025] In this embodiment, specifically: Main control component 10: The housing 101 is welded from cold-rolled steel plate, and the labyrinth seal at the joints can withstand an explosion pressure of ≥1MPa. The outer wall is coated with antistatic powder (surface resistance 10 Ω·cm). 6 -10 9Ω). The vibration damping pads 102 at the four corners of both side walls absorb the vibration energy of the tunneling machine, reducing the risk of components loosening.

[0026] Safety interlocking system: The spring lock rod 201 of the door lock mechanism 20 of the electrical control box is linked with the auxiliary contact of the main circuit breaker to achieve "power-off unlocking" through the pilot circuit - the spring lock rod 201 can only retract when the main circuit breaker is disconnected, and the operating handle 202 completes the door opening action under the constraint of the limit arc plate 203, preventing live operation.

[0027] Integrated wiring: The inlet and outlet control horn 303 of the wiring assembly 30 adopts a sparkless plug-in structure, the cable junction box 302 organizes the cable routing, and together with the terminal block 304, it realizes strong and weak current isolation and reduces the risk of short circuit.

[0028] Intelligent protection module: The display screen 107 on the door 105 displays parameters such as motor current and cabinet temperature in real time. The built-in PLC controller links the gas sensor (response time ≤ 0.5 seconds) and temperature detector to realize protection functions such as power cut-off when gas exceeds the limit and speed reduction when motor exceeds the temperature (such as cutting off the power when the motor temperature reaches 155℃).

[0029] Example 2 The difference from Example 1 is that: an explosion-proof mining tunneling machine multi-protection electrical control box includes a box body 101 welded from Q235 cold-rolled steel plate, the weld seam is tested for kerosene leakage, the roughness of the explosion-proof joint surface Ra≤6.3μm, and the gap≤0.2mm; The spring lock rod 201 of the door lock mechanism 20 of the electrical control box adopts a φ12mm stainless steel rod, and is fitted with a compression spring (elastic coefficient 5N / mm), which is connected in series with the auxiliary contacts of the main circuit breaker (model DW15-200) to form a control circuit; The PLC selected is FX2N-48MR, connected to a Pt100 temperature sensor (temperature range -50℃ to 200℃) and a KGJ16 gas sensor, with alarm threshold set at 1.0% CH4 and power failure threshold at 1.5% CH4. After vibration testing (10-500Hz sinusoidal vibration) and explosion-proof testing (internal ignition without explosion propagation), all indicators meet the standards.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-protection electrical control box for an explosion-proof mining tunneling machine, comprising a main control component (10), characterized in that: The main control component (10) includes a housing (101), and a wiring assembly (30) is fixedly installed on the top of the housing (101). The wiring assembly (30) includes a wiring box (301), a cable junction box (302), an inlet / outlet control horn (303), and wiring terminals (304). The left and right sides of the junction box (301) are respectively equipped with cable junction trays (302) and inlet / outlet control horn ports (303). The back of the junction box (301) is equidistantly equipped with wiring terminals (304). The side of the box (101) is equipped with an electrical control box door lock mechanism (20).

2. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 1, characterized in that: The four corners of the two side walls of the box (101) are symmetrically equipped with shock-absorbing pads (102).

3. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 1, characterized in that: The front end of the box (101) is symmetrically connected to a door (105) by a pin (104), and the door (105) is connected to the door lock mechanism (20) of the electrical control box.

4. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 3, characterized in that: Box handles (103) are installed on both sides of the box (101), and box door handles (106) are installed on the front of the box door (105).

5. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 3, characterized in that: A display screen (107) is embedded in the front of the door (105), and a control button (108) is installed below the display screen (107).

6. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 1, characterized in that: The electrical control box door lock mechanism (20) includes a spring lock rod (201), an operating handle (202) and a limiting arc plate (203). The left and right sides of the operating handle (202) are respectively connected to the spring lock rod (201) and the limiting arc plate (203).

7. The explosion-proof mining tunneling machine multi-protection electrical control box according to claim 1, characterized in that: A traction assembly (40) is installed on one side wall of the housing (101). The traction assembly (40) includes a connecting terminal (401), a chain (402), and a pipe clamp hanger (403). The upper and lower ends of the chain (402) are respectively connected to the connecting terminal (401) and the pipe clamp hanger (403).

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