Mining flame-proof and intrinsic safety type digital flame-proof box

Abstract

The utility model provides a mining flame-proof and intrinsic safety type digital flame-proof box, and belongs to the field of flame-proof boxes. The problems that a digital belt scale host is heavy and poor in communication signal are solved. In order to solve the technical problem, the technical scheme adopted by the utility model is that the explosion-proof box comprises an intrinsic safety box body and an explosion-proof box body, the intrinsic safety box body is provided with a wire inlet nozzle, the explosion-proof box body comprises an explosion-proof main box body, the explosion-proof main box body is provided with an explosion-proof cover, a matching part of a flange and the explosion-proof cover forms an explosion-proof joint surface I, the explosion-proof cover is provided with a window and a plurality of first wiring terminals, and the first wiring terminals are connected with the explosion-proof joint surface I; a glass pressing plate is arranged on one side of the window through a sealing gasket, a red copper gasket is arranged on the other side of the window, a second explosion-proof joint face is formed at the matching position of the explosion-proof cover and the first wiring terminal, a third explosion-proof joint face is formed at the matching position of the window and the red copper gasket, and a fourth explosion-proof joint face is formed at the matching position of the red copper gasket and the explosion-proof cover. The wire inlet nozzle is connected with the first wiring terminal through a through-wall line; the utility model is applied to the belt weigher.

Description

Technical Field

[0001] The utility model provides a mine-used flameproof and intrinsically safe digital flameproof box, belonging to the field of flameproof boxes. Background Art

[0002] At present, the underground environment of mines is complex, and dangerous gases or dust enter the casing of electrical products. The components inside the casing may short-circuit or explode. Therefore, underground electrical products are required to meet explosion-proof and flameproof requirements. The existing belt scale host is a single intrinsically safe box, which does not meet the flameproof requirements. If the intrinsically safe circuit is placed in the flameproof box, the entire host will be relatively bulky, and the signal will be offset after the terminal block is switched, resulting in poor communication signals. Utility Model Content

[0003] In order to solve the technical problems of bulky digital belt scale host, poor communication signal and poor explosion-proof and flameproof performance, the utility model proposes a mining explosion-proof and intrinsically safe digital explosion-proof box, the purpose of which is to meet the use requirements of mining electrical appliances by improving the hardware structure and circuit structure of the mining belt scale host.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a mine-use flameproof and intrinsically safe digital flameproof box, comprising an intrinsically safe box body and a flameproof box body, wherein an intrinsically safe circuit is arranged in the intrinsically safe box body, and a plurality of line inlets are arranged on the intrinsically safe box body;

[0005] The explosion-proof box comprises an explosion-proof main box, a flange is arranged on the explosion-proof main box, an explosion-proof cover is arranged on the flange, a first explosion-proof joint surface is formed at the joint position of the flange and the explosion-proof cover, a window and a plurality of first wiring terminals are arranged on the explosion-proof cover, a glass pressure plate is arranged on one side of the window through a sealing gasket, and a copper gasket is arranged on the other side of the window; the sealing gasket and the glass pressure plate are fixed to the explosion-proof cover by screws 2; a second explosion-proof joint surface is formed at the joint position of the explosion-proof cover and the first wiring terminals;

[0006] The cooperation between the window and the copper gasket forms a third explosion-proof joint surface, and the cooperation between the copper gasket and the explosion-proof cover forms a fourth explosion-proof joint surface;

[0007] The line inlet nozzle is connected to the first wiring terminal via a wall-penetrating line;

[0008] The flameproof box is also provided with a bottom support, on which a plurality of protective sealing rings are provided, on which a sleeve is provided, in which a copper sleeve is provided, and in which a flameproof through-wall terminal is provided;

[0009] The flameproof through-wall terminal comprises a partition, a head and screw three, the partition is provided with a plurality of through holes, a communication medium passes through the through hole, the communication medium comprises a sheath-removing section, and the sheath-removing section is transitionally matched with the through hole; epoxy resin is cast around the communication medium, and both ends of the communication medium pass through the flameproof through-wall terminal from the head, the screw three is fixed to the copper sleeve by a locking nut; the copper sleeve and the through sleeve form a flameproof joint surface five at the matching position;

[0010] The flameproof box is also provided with an intrinsically safe panel and a liquid crystal panel, one side of the intrinsically safe panel is provided with a power module, and the other side of the intrinsically safe panel is provided with a circuit module;

[0011] The explosion-proof main box is provided with a plurality of cable lead-in devices;

[0012] The flameproof box is also provided with a mounting plate, the mounting plate is provided with a wiring terminal plate, and the wiring terminal plate is provided with a second wiring terminal.

[0013] Furthermore, a spring washer is provided between the second screw and the glass pressing plate.

[0014] Furthermore, the length of the de-sheathing section is 6 mm, and the thickness of the epoxy resin is ≥5 mm.

[0015] Furthermore, the material of the partition is epoxy resin; the material of the head and the sleeve is flame-retardant nitrile rubber; and the material of the terminal board is bakelite.

[0016] Furthermore, a stainless steel keyboard is provided on the intrinsically safe box.

[0017] Furthermore, a plurality of identification plates are provided on the flameproof box.

[0018] Furthermore, a plurality of lifting rings are provided on the flameproof box.

[0019] The beneficial effects of the present invention compared with the prior art are as follows:

[0020] 1. The structure of the utility model is compact and light as a whole. The intrinsically safe box and the flameproof box are connected by a through-wall line, which is convenient for on-site wiring and can play the role of explosion-proof and flameproof.

[0021] 2. The utility model combines the setting of multiple explosion-proof joint surfaces, the sealing setting and the standardized setting of the box thickness, which can effectively meet the explosion-proof requirements of mine electrical appliances. Even if an explosion occurs inside, the flame can be stably isolated inside, effectively isolating the flame from external flammable and explosive gases, and improving explosion-proof performance and impact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a partial cross-sectional view of the utility model;

[0024] Figure 2 It is a partial cross-sectional view of the utility model;

[0025] Figure 3 This is the front view of the explosion-proof box of the utility model;

[0026] Figure 4 It is a top view of the explosion-proof box of the utility model;

[0027] Figure 5 for Figure 3 Sectional view of AA in the middle;

[0028] Figure 6 This is a schematic diagram of the structure of the explosion-proof main box of the utility model;

[0029] Figure 7 It is a front view of the flange of the utility model;

[0030] Figure 8 for Figure 7 Cross-sectional view of the middle BB;

[0031] Fig. 9 This is the front view of the explosion-proof cover of the utility model

[0032] Fig.10 for Fig. 9 Cross-sectional view of CC;

[0033] Fig.11 This is a view of the copper gasket of the utility model;

[0034] Fig.12 for Fig.11 A full cross-sectional view of

[0035] Fig.13 This is a front view of the bottom support of the utility model;

[0036] Fig.14 It is a side view of the bottom support of the utility model;

[0037] Fig.15 It is a structural schematic diagram of the sleeve of the utility model;

[0038] Fig.16 It is a schematic diagram of the structure of a partial section of the copper sleeve of the utility model;

[0039] Fig.17 It is a cross-sectional view of the flameproof through-wall terminal of the utility model;

[0040] Fig.18It is a front view of the partition of the utility model;

[0041] Fig.19 It is a cross-sectional view of the partition of the utility model;

[0042] In the figure: 1 is a flameproof box, 2 is an intrinsically safe box, 3 is a line inlet, 4 is an explosion-proof main box, 5 is a flange, 6 is an explosion-proof cover, 7 is a flameproof joint surface 1, 8 is a window, 9 is a first terminal, 10 is a sealing gasket, 11 is a glass pressure plate, 12 is a copper gasket, 13 is a flameproof joint surface 2, 14 is a flameproof joint surface 3, 15 is a flameproof joint surface 4, 16 is a bottom support, 17 is a protective sealing ring, 18 is a sleeve, 19 is a copper sleeve, 20 is a flameproof through-wall terminal, 21 is a partition, 22 is a head, 23 is a screw Nail three, 24 is a through hole, 25 is a communication medium, 26 is a sheath removal section, 27 is epoxy resin, 28 is an explosion-proof joint surface five, 29 is an intrinsically safe board, 30 is a liquid crystal board, 31 is a power module, 32 is a circuit module, 33 is a cable lead device, 34 is a mounting plate, 35 is a terminal board, 36 is a second terminal, 37 is a lifting ring, 38 is a locking nut, 39 is a fixing device, 40 is screw two, 41 is a flip support, 42 is a flip sleeve, 43 is a rotating shaft, 44 is an identification plate, and 45 is a keyboard. DETAILED DESCRIPTION

[0043] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0044] like Figures 1 to 19 As shown, the utility model provides a flameproof and intrinsically safe digital flameproof box for mining, comprising an intrinsically safe box body 2 and a flameproof box body 1, wherein an intrinsically safe circuit is arranged in the intrinsically safe box body 2, and a plurality of line inlets 43 and a stainless steel keyboard 45 are arranged on the intrinsically safe box body 2.

[0045] The explosion-proof box 1 includes an explosion-proof main box 4, a flange 5 is provided on the explosion-proof main box 4, an explosion-proof cover 6 is provided on the flange 5, and the flange 5 and the explosion-proof cover 6 form an explosion-proof joint surface 1 7 at the joint position, a window 8 and a plurality of first wiring terminals 9 and a plurality of fixing devices 39 are provided on the explosion-proof cover 6, a glass pressing plate 11 is provided on one side of the window 8 through a sealing gasket 10, and a copper gasket 12 is provided on the other side of the window 8, and the fixing device 39 is used to fix the identification plate 44; the sealing gasket 10 and the glass pressing plate 11 are fixed to the explosion-proof cover 6 through screws 2 40; a spring washer is also provided between the screws 2 40 and the glass pressing plate 11; the explosion-proof cover 6 and the first wiring terminal 9 form an explosion-proof joint surface 2 13 at the joint position; the window 8 and the copper gasket 12 form an explosion-proof joint surface 3 14 at the joint position, and the copper gasket 12 and the explosion-proof cover 6 form an explosion-proof joint surface 4 15 at the joint position. The inlet nozzle 43 is connected to the first wiring terminal 9 through a through-wall line.

[0046] The flameproof box 1 is also provided with a bottom support 16, on which a plurality of protective sealing rings 17 are provided, on which a sleeve 18 is provided, in which a copper sleeve 19 is provided, and in which a flameproof through-wall terminal 20 is provided;

[0047] The flameproof through-wall terminal 20 includes a partition 21, a head 22 and screw three. The partition 21 is provided with a plurality of through holes 24, through which a communication medium 25 runs. The communication medium 25 includes a sheath-removing section 26, the length of which is 6 mm. The diameter of the communication medium 25 and the length of the sheath-removing section 26 can be adaptively adjusted according to customer needs, and the sheath-removing section 26 is transitionally matched with the through hole 24. The communication medium 25 is surrounded by epoxy resin 27, and the thickness of the epoxy resin 27 is ≥5 mm; both ends of the communication medium 25 pass through the flameproof through-wall terminal 20 from the head 22, and the screw three 23 is fixed to the copper sleeve 19 through the locking nut 38; the matching part of the copper sleeve 19 and the over sleeve 18 forms a flameproof joint surface five 28.

[0048] The flameproof box 1 is also provided with an intrinsically safe panel 29 and a liquid crystal panel 30. A power module 31 is provided on one side of the intrinsically safe panel 29, and a circuit module 32 is provided on the other side of the intrinsically safe panel 29. The explosion-proof main box 4 is provided with a plurality of cable lead devices 33 and a mounting plate 34. A terminal board 35 is provided on the mounting plate 34, and a second terminal 36 is provided on the terminal board 35.

[0049] The roughness of the flameproof joint surface 1 7 is Rz3.2, the width of the flameproof joint surface 2 13 is L≥12.5mm, the fitting clearance ic≤0.2mm, and the roughness Rz is Rz3.2, the width of the flameproof joint surface 3 14 is L≥16mm, the fitting clearance ic≤0.15mm, and the roughness is 3.2, the width of the flameproof joint surface 4 15 is L≥16mm, the fitting clearance ic≤0.1mm, and the roughness is 3.2, and the width of the flameproof joint surface 5 28 is L≥15mm, the fitting clearance ic≤0.3mm, and the roughness is 3.2.

[0050] The thickness of the flameproof box 1 meets the flameproof requirements of mining electrical appliances, and the material of the flameproof box 1 is Q235 steel. The flameproof joint surface is not painted, but can be coated with vaseline for rust prevention.

[0051] The material of the partition plate 21 is epoxy resin 27, the material of the end cap 22 and the sleeve 18 is flame retardant nitrile rubber, and the material of the terminal board 35 is bakelite.

[0052] The flameproof box 1 is also provided with a turning sleeve 42 and a plurality of hanging rings 37 , and the turning sleeve 42 is provided with a turning support 41 and a rotating shaft 43 .

[0053] The utility model's flameproof joint surface 1 7, flameproof joint surface 2 13, flameproof joint surface 3 14, flameproof joint surface 4 15, flameproof joint surface 5 28 and sealing arrangement can effectively ensure that the overall structure of the flameproof box 1 of the utility model is compact, and the arrangement of the intrinsically safe circuit combined with the flameproof box 1 can effectively avoid the danger caused by the explosion, and improve the explosion-proof and flameproof performance and impact resistance of the utility model. Since the intrinsically safe circuit is arranged in the intrinsically safe box, the thickness of the intrinsically safe box is not as thick as the thickness of the flameproof box, thereby improving the strength of the communication signal.

[0054] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring about corresponding technical effects, and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A digital explosion-proof box for mines with flameproof and intrinsic safety, characterized by: It comprises an intrinsically safe box (2) and a flameproof box (1), wherein an intrinsically safe circuit is arranged in the intrinsically safe box (2), and a plurality of line inlets (3) are arranged on the intrinsically safe box (2); The explosion-proof housing (1) comprises an explosion-proof main housing (4), a flange (5) is arranged on the explosion-proof main housing (4), an explosion-proof cover (6) is arranged on the flange (5), a first explosion-proof joint surface (7) is formed at the joint position between the flange (5) and the explosion-proof cover (6), a viewing window (8) and a plurality of first wiring terminals (9) are arranged on the explosion-proof cover (6), a glass pressure plate (11) is arranged on one side of the viewing window (8) via a sealing gasket (10), and a red copper gasket (12) is arranged on the other side of the viewing window (8); the sealing gasket (10) and the glass pressure plate (11) are fixed to the explosion-proof cover (6) via a second screw (40); a second explosion-proof joint surface (13) is formed at the joint position between the explosion-proof cover (6) and the first wiring terminals (9); The cooperation between the viewing window (8) and the copper gasket (12) forms a third explosion-proof joint surface (14), and the cooperation between the copper gasket (12) and the explosion-proof cover (6) forms a fourth explosion-proof joint surface (15); The line inlet nozzle (3) is connected to the first wiring terminal (9) via a wall-penetrating line; The flameproof box (1) is also provided with a bottom support (16), the bottom support (16) is provided with a plurality of protective sealing rings (17), the protective sealing ring (17) is provided with a sleeve (18), a copper sleeve (19) is provided in the sleeve (18), and a flameproof through-wall terminal (20) is provided in the copper sleeve (19); The flameproof through-wall terminal (20) comprises a partition (21), a sealing head (22) and a screw three (23). The partition (21) is provided with a plurality of through holes (24). A communication medium (25) passes through the through hole (24). The communication medium (25) comprises a sheath-removing section (26). The sheath-removing section (26) is transitionally matched with the through hole (24). Epoxy resin (27) is cast around the communication medium (25). Both ends of the communication medium (25) pass through the flameproof through-wall terminal (20) from the sealing head (22). The screw three (23) is fixed to the copper sleeve (19) by a locking nut (38). The matching portion of the copper sleeve (19) and the through sleeve (18) forms a flameproof joint surface five (28). An intrinsically safe panel (29) and a liquid crystal panel (30) are also provided in the flameproof box (1); a power module (31) is provided on one side of the intrinsically safe panel (29), and a circuit module (32) is provided on the other side of the intrinsically safe panel (29); The explosion-proof main box (4) is provided with a plurality of cable lead devices (33); The flameproof box (1) is also provided with a mounting plate (34), the mounting plate (34) is provided with a wiring terminal plate (35), and the wiring terminal plate (35) is provided with a second wiring terminal (36).

2. A mine flameproof and intrinsically safe digital flameproof box according to claim 1, characterized in that: A spring washer is also provided between the second screw (40) and the glass pressing plate (11).

3. The flameproof and intrinsically safe digital flameproof box for mining according to claim 1 is characterized in that: The length of the de-sheathing section (26) is 6 mm, and the thickness of the epoxy resin (27) is ≥ 5 mm.

4. The flameproof and intrinsically safe digital flameproof box for mining according to claim 1 is characterized in that: The material of the partition (21) is epoxy resin (27); the material of the sealing head (22) and the sleeve (18) is flame-retardant nitrile rubber; and the material of the terminal board (35) is bakelite.

5. The flameproof and intrinsically safe digital flameproof box for mining use according to claim 1 is characterized in that: The intrinsically safe box (2) is provided with a stainless steel keyboard (45).

6. The flameproof and intrinsically safe digital flameproof box for mining use according to claim 1 is characterized in that: A plurality of identification plates (44) are provided on the flameproof box (1).

7. The flameproof and intrinsically safe digital flameproof box for mining according to claim 1 is characterized by: A plurality of lifting rings (37) are provided on the flameproof box (1).

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