Intrinsically safe mining explosion-proof electric cabinet

Abstract

The invention discloses an intrinsically safe mining explosion-proof electric control box, and relates to the technical field of electric control boxes, in particular to an intrinsically safe mining explosion-proof electric control box which comprises a box body, a sealing door is movably connected to the rear portion of the box body, sealing rubber strips are adhered to the inner edges and corners of the box body, sealing blocks are fixedly installed on the left side and the right side of the box body, and the sealing rubber strips are arranged on the sealing blocks. The upper portion, the lower portion, the front side and the rear side of the sealing block are fixedly sleeved with sealing sleeves correspondingly, guide blocks are fixedly sleeved with the sealing sleeves, and a middle sealing block is movably supported in the sealing door. According to the intrinsically safe mining explosion-proof electric cabinet, through arrangement of a current limiting sleeve, a pressure limiting and current limiting structure in the current limiting sleeve, cooperation of a middle sealing block, an inner side sealing block and an inner side one-way pipeline of an outer side sealing block, and arrangement of a sealing rubber strip, the intrinsically safe mining explosion-proof electric cabinet can be sealed after the box body is plugged in the use process; the oxygen content in the inner cavity of the box body is reduced in an auxiliary mode, inert gas is used for filling, fire explosion can be effectively avoided, and intrinsic safety is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electric control boxes, in particular to an intrinsically safe explosion-proof electric control box for mining. Background Art

[0002] An electric control box contains one or more low-voltage switchgear and related control, measurement, signal, protection, regulation and other equipment, and is completely assembled together by the manufacturer with structural components. An explosion-proof electric control box is an electrical equipment specially designed for use in hazardous areas. It is mainly used for the distribution and control of electric energy. It can realize the connection and disconnection of electrical lines and the start, stop and adjustment of electrical equipment. Intrinsically safe type is an explosion-proof type of electrical equipment. It limits the energy of electric sparks or thermal effects that may be generated by connecting wires inside the equipment and exposed to potentially explosive environments to a level that cannot produce ignition.

[0003] Under the standard of intrinsic safety, fire and explosion can be effectively avoided by limiting power directly. However, there are certain restrictions on power, which will limit the convenience of use. In some environments, in order to ensure the stability of power supply, it is impossible to meet the voltage limit and stability at the same time. When used in a mine environment, the operating environment of the electric control box is harsh and the dust content in the surrounding air is high. In order to avoid overvoltage during use, which may cause spark explosions and other dangerous situations, we propose an intrinsically safe mining explosion-proof electric control box. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intrinsically safe explosion-proof electric control box for mining, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intrinsically safe explosion-proof electric control box for mining, comprising a box body, a sealing door movably connected to the rear of the box body, sealing strips adhered to the internal edges and corners of the box body, sealing blocks fixedly installed on the left and right sides of the box body, sealing sleeves are fixedly sleeved on the top, bottom, front and rear sides of the sealing blocks respectively, a guide block is fixedly sleeved on the inside of the sealing sleeve, a middle sealing block is movably supported on the inside of the sealing door, an inner sealing block is fixedly connected to the front of the middle sealing block, an outer sealing block is fixedly connected to the rear of the middle sealing block, a limiting flow sleeve is fixedly supported on the front of the inner sealing block, a pressure box is fixedly supported on the top surface of the inner cavity of the box body, a sealing sleeve is fixedly supported on the top surface of the inner cavity of the box body, two one-way pipes are sleeved inside the middle sealing block, and a one-way pipe is fixedly sleeved on the top of the box body.

[0006] Optionally, protective sleeves are fixedly supported on the left and right sides of the box body, and a side sealing door is movably connected to the outer side of the protective sleeve. A wire ring is fixedly supported on the outer side of the sealing block, and the inner cavity of the sealing block and the inner cavity of the box body are connected to each other.

[0007] Optionally, the width of the middle sealing block is greater than the width of the sealing door, the outer diameter of the middle sealing block is smaller than the outer diameters of the inner sealing block and the outer sealing block, and the outer side of the inner sealing block fits against the inner wall of the box body.

[0008] Optionally, a flow limiting ring is fixedly mounted inside the flow limiting sleeve, the flow limiting plate and the inner side of the flow limiting sleeve are fixedly mounted, the inner wall of the flow limiting sleeve fixedly supports the flow limiting plate, and the inner side of the flow limiting plate is fixedly connected to a flow limiting spring.

[0009] Optionally, the pressure box has an internal fixed support with a pressure relief spring, the rear end of the pressure relief spring is fixedly connected to a pressure relief plate, the rear wall of the pressure box is provided with an exhaust port, the internal fixed support of the sealing sleeve has a sealing wax block, and the bottom wall of the sealing sleeve is fixedly provided with a heat conductive block.

[0010] Optionally, a sealing ring is fixedly mounted on one end of the one-way pipe, a support ring is fixedly mounted on the other end of the one-way pipe, a support spring is fixedly supported on the inner side of the support ring, and a sealing sheet is supported on the end of the support spring.

[0011] Optionally, the protective sleeve is located outside the sealing block, the wire ring is located inside the side sealing door, and the outer wall of the wire ring is provided with uniform threading holes.

[0012] Optionally, a one-way pipe inside the middle sealing block, the inner sealing block and the outer sealing block is located behind the flow limiting sleeve, the inner side of the other one-way pipe is connected to the inner cavity of the box, and the one-way pipe is located near the bottom of the flow limiting sleeve.

[0013] Optionally, the blocking sleeve is located at the rear of the pressure box and fits the pressure box, and the front of the delivered sealing wax block fits the rear of the pressure box to block the exhaust port.

[0014] Optionally, the heat conductive block extends upward to the interior of the sealing wax block, and the heat conductive block extends downward to below the sealing sleeve, and the one-way pipe on the top surface of the box body is located behind the inner cavity pressure relief plate of the pressure box.

[0015] The present invention provides an intrinsically safe explosion-proof electric control box for mining, which has the following beneficial effects:

[0016] The intrinsically safe explosion-proof electric control box for mining, through the setting of the current limiting sleeve, utilizing the pressure limiting and current limiting structure inside the current limiting sleeve, through the cooperation of the middle sealing block, the inner sealing block, the one-way pipe inside the outer sealing block, and the setting of the sealing strip, can assist in reducing the oxygen content in the inner cavity of the box after the box is sealed during use, and can be filled with inert gas, which can effectively avoid fire and explosion, and achieve intrinsic safety;

[0017] Through the setting of the box body, a sealing door is movably connected to the back of the box body, so that the inner part of the sealing door can be movably covered with a middle sealing block, and the inner sealing block and the outer sealing block located at the front and rear sides of the sealing door are respectively connected to the front and rear sides of the middle sealing block. The outer diameter of the middle sealing block is smaller than the outer diameter of the inner sealing block and the outer sealing block, which can prevent the middle sealing block and the inner sealing block and the outer sealing block from moving as a whole to the outside of the sealing door. At the same time, the width of the middle sealing block is greater than the width of the sealing door, and the air pressure difference between the inner cavity of the box body and the outside can be directly reflected through the middle sealing block.

[0018] By arranging a pressure box at the top of the inner cavity of the box, supporting the pressure relief plate through the pressure relief spring inside the pressure box, and using the sealing sleeve behind the pressure box to support the sealing wax block of the pressure box, and at the same time, the heat conduction block extends to the bottom of the sealing sleeve, combustion can occur in the inner cavity of the box, causing the temperature to rise, and then a large amount of inert gas can be released in time to expel the oxygen in the inner cavity of the box, so that it is in an oxygen-free environment for a short time, thereby avoiding the increase of losses;

[0019] By supporting sealing blocks on the left and right outer sides of the box, multiple sealing sleeves and guide blocks are set on the upper and lower front and back of the sealing block, which can cooperate with the box to achieve sealed wiring. At the same time, the wire ring supported on the outer side of the sealing block can be used to separate and connect the wires, avoiding the inconvenience of separating the whole bundle of wires. At the same time, it can effectively prevent the burning from spreading to the remaining wires after the fuse occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the splitting of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the door sealing of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the current limiting sleeve of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a one-way pipeline of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the pressure box of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the sealing block of the present invention.

[0027] In the figure: 1. box body; 2. sealing door; 3. middle sealing block; 4. inner sealing block; 5. outer sealing block; 6. flow limiting sleeve; 7. one-way pipe; 8. diverter plate; 9. flow limiting ring; 10. flow limiting plate; 11. flow limiting spring; 12. sealing ring; 13. support ring; 14. sealing sheet; 15. support spring; 16. pressure box; 17. pressure relief spring; 18. pressure relief plate; 19. plugging sleeve; 20. sealing wax block; 21. heat transfer block; 22. sealing block; 23. sealing sleeve; 24. guide block; 25. wire ring; 26. protective sleeve; 27. side sealing door; 28. sealing strip. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figures 1 to 7 The present invention provides a technical solution: an intrinsically safe explosion-proof electric control box for mining, comprising a box body 1, a sealing door 2 movably connected to the rear of the box body 1, a sealing strip 28 adhered to the internal corners of the box body 1, and the sealing strip 28 is arranged inside the box body 1, which can effectively ensure the sealing effect of the inner cavity of the box body 1, and cooperate with the inner sealing block 4 to facilitate the control of the air pressure in the inner cavity of the box body 1 and the oxygen content of the air, and the left and right sides of the box body 1 are fixedly installed with sealing blocks 22, and the setting of the sealing block 22 can play a role in ensuring the sealing of internal and external wires, avoiding the interaction between the outside air and the air in the box 1 while ensuring the stability of the connection, and the upper and lower sides and the front and rear sides of the sealing block 22 are respectively fixedly sleeved with sealing sleeves 23, and the inner side of the sealing sleeve 23 is fixedly sleeved with a guide block 24, and the inner side of the sealing door 2 is movably supported by a middle sealing block 3, and the front of the middle sealing block 3 is fixedly connected with the inner sealing block 4, and the middle sealing block 3 is fixedly connected to an outer sealing block 5 at the rear, and the cooperation of the middle sealing block 3 and the inner sealing block 4 with the outer sealing block 5 can intuitively reflect the inner cavity air pressure of the box body 1, which is convenient for controlling the supply of inert gas. The front of the inner sealing block 4 is fixedly supported with a limiting flow sleeve 6. The setting of the limiting flow sleeve 6 can cooperate with the one-way pipe 7 to carry out the process of exhausting air, thereby forming a flow difference of air pressure, thereby improving the efficiency of deoxygenation. The top surface of the inner cavity of the box body 1 is fixedly supported with a pressure box 16, and the top surface of the inner cavity of the box body 1 is fixedly supported with a sealing sleeve 19. The cooperation of the pressure box 16 and the sealing sleeve 19 can assist in fire extinguishing in extreme cases. The middle sealing block 3 and the inner sealing block 4 and the outer sealing block 5 are internally covered with two one-way pipes 7, and the top of the box body 1 is fixedly covered with a one-way pipe 7. The one-way pipe 7 can perform one-way flow limiting, which is convenient for inflation and exhaust, and can control the inner cavity air pressure and gas of the box body 1.

[0030] The left and right sides of the box body 1 are respectively fixedly supported with protective sleeves 26, the outer side of the protective sleeve 26 is movably connected with a side sealing door 27, the outer side of the sealing block 22 is fixedly supported with a wire ring 25, the inner cavity of the sealing block 22 and the inner cavity of the box body 1 are connected to each other, the cooperation of the protective sleeve 26 and the side sealing door 27 can protect the sealing block 22, and a rubber bundle coil is arranged in the middle of the side sealing door 27.

[0031] The width of the middle sealing block 3 is greater than the width of the sealing door 2 , and the outer diameter of the middle sealing block 3 is smaller than the outer diameters of the inner sealing block 4 and the outer sealing block 5 . The outer side of the inner sealing block 4 fits the inner wall of the box body 1 .

[0032] The flow limiting sleeve 6 is internally fixed with a diverter plate 8, the diverter plate 8 and the inner side of the flow limiting sleeve 6 are fixedly mounted with a flow limiting ring 9, the inner wall of the flow limiting sleeve 6 fixedly supports the flow limiting plate 10, the inner side of the flow limiting plate 10 is fixedly connected to a flow limiting spring 11, the diverter plate 8 is horizontally arranged up and down inside the flow limiting sleeve 6, and the flow limiting sleeve 6 is cut into a Z-shaped airflow path, and the cooperation of the flow limiting plate 10, the flow limiting spring 11 and the flow limiting ring 9 can limit the air pressure.

[0033] The pressure box 16 has a pressure relief spring 17 fixedly supported inside, a pressure relief plate 18 fixedly connected to the rear end of the pressure relief spring 17, an exhaust port is provided on the rear wall of the pressure box 16, a sealing wax block 20 is fixedly supported inside the sealing sleeve 19, and a heat conductive block 21 is fixedly mounted on the bottom wall of the sealing sleeve 19. In some extreme cases, combustion still occurs in the inner cavity of the box body 1, and the high temperature will be conducted to the sealing wax block 20 through the heat conductive block 21, thereby melting the sealing wax block 20, and then the pressure relief spring 17 will push the pressure relief plate 18 to move outward, thereby spraying a large amount of inert gas, expelling oxygen from the inner cavity of the box body 1, and quickly extinguishing the flame.

[0034] A sealing ring 12 is fixedly mounted on one end of the one-way pipe 7 , and a supporting ring 13 is fixedly mounted on the other end of the one-way pipe 7 . A supporting spring 15 is fixedly supported on the inner side of the supporting ring 13 , and a sealing sheet 14 is supported on the end of the supporting spring 15 .

[0035] The protective sleeve 26 is located outside the sealing block 22 , the wire loop 25 is located inside the side sealing door 27 , and the outer wall of the wire loop 25 is provided with uniform threading holes.

[0036] A one-way pipe 7 inside the middle sealing block 3, the inner sealing block 4 and the outer sealing block 5 is located behind the flow limiting sleeve 6, and the inner side of another one-way pipe 7 is connected to the inner cavity of the box body 1. The one-way pipe 7 is located near the bottom of the flow limiting sleeve 6.

[0037] The blocking sleeve 19 is located at the rear of the pressure box 16 and is in close contact with the pressure box 16 , and the front of the transported sealing wax block 20 is in close contact with the rear of the pressure box 16 to block the exhaust port.

[0038] The heat conducting block 21 extends upward to the inside of the sealing wax block 20 , and extends downward to below the blocking sleeve 19 . The one-way pipe 7 on the top surface of the box body 1 is located behind the inner cavity pressure relief plate 18 of the pressure box 16 .

[0039] In summary, when using the intrinsically safe explosion-proof electric control box for mining, first, when wiring, open the side sealing door 27, so that the connected wire extends from the outside of the wire loop 25 into the inside of the wire loop 25, then passes through the wire loop 25 to continue to the outside of the wire loop 25, and then extends to the outside of the sealing block 22, connects the outer end of the guide block 24, and then connects the electric control components through the inner end. After the connection is completed, close the side sealing door 27, and then close the sealing door 2, so that the inner sealing block 4 inside the sealing door 2 cooperates with the sealing strip 28 to complete the sealing of the box body 1, and then use the middle sealing block 3 and the one-way pipe 7 inside the inner sealing block 4 and the outer sealing block 5 to continuously pump air outward, and then extract the air in the inner cavity of the box body 1, and at the same time, through the one-way pipe 7 inside the limiting sleeve 6, continuously transport inert gas to the inside of the limiting sleeve 6, such as helium He, neon Ne, argon Ar, krypton Kr, xenon Xe, so that the inert gas is in the limiting sleeve 6, the flow is limited by the action of the diverter plate 8 inside, and the cooperation of the flow limiting plate 10 and the flow limiting ring 9 can limit the pressure, thereby realizing the time difference between oxygen extraction and inert gas delivery again, and reducing the oxygen content in the inner cavity of the box body 1. At the same time, the position of the middle sealing block 3 can effectively reflect the air pressure state of the inner cavity of the box body 1, so that the air pressure in the inner cavity of the box body 1 is slightly lower than the external air pressure, and the oxygen ratio is low. During use, it can effectively avoid fire and explosion in the inner cavity of the box body 1. During regular maintenance, check the air pressure behind the inner cavity pressure relief plate 18 of the pressure box 16, and fill it with inert gas. In some extreme cases, the inner cavity of the box body 1 still burns, and the high temperature will be transmitted to the sealing wax block 20 through the heat conductive block 21, thereby melting the sealing wax block 20, and then the pressure relief spring 17 will push the pressure relief plate 18 to move outward, thereby spraying a large amount of inert gas, expelling the oxygen in the inner cavity of the box body 1, and quickly extinguishing the flame.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intrinsically safe explosion-proof electric control box for mining, comprising a box body (1), characterized in that: The rear of the box body (1) is movably connected to a sealing door (2), the inner corners of the box body (1) are adhered with sealing strips (28), the left and right sides of the box body (1) are fixedly installed with sealing blocks (22), the upper and lower sides and the front and rear sides of the sealing block (22) are respectively fixedly sleeved with sealing sleeves (23), the interior of the sealing sleeve (23) is fixedly sleeved with a guide block (24), the interior of the sealing door (2) is movably supported by a middle sealing block (3), and the front of the middle sealing block (3) is fixedly connected with an inner sealing The middle sealing block (3) is fixedly connected to an outer sealing block (5) at the rear, the inner sealing block (4) is fixedly supported on a limiting flow sleeve (6) at the front, the inner cavity top surface of the box body (1) is fixedly supported on a pressure box (16), the inner cavity top surface of the box body (1) is fixedly supported on a plugging sleeve (19), the middle sealing block (3), the inner sealing block (4) and the outer sealing block (5) are internally sleeved with two one-way pipes (7), and the top of the box body (1) is fixedly sleeved with a one-way pipe (7).

2. The intrinsically safe explosion-proof electric control box for mining according to claim 1 is characterized in that: The left and right sides of the box body (1) are respectively fixedly supported with protective sleeves (26), the outer side of the protective sleeve (26) is movably connected with a side sealing door (27), the outer side of the sealing block (22) is fixedly supported with a wire ring (25), and the inner cavity of the sealing block (22) and the inner cavity of the box body (1) are connected to each other.

3. The intrinsically safe explosion-proof electric control box for mining according to claim 1 is characterized in that: The width of the middle sealing block (3) is greater than the width of the sealing door (2), the outer diameter of the middle sealing block (3) is smaller than the outer diameters of the inner sealing block (4) and the outer sealing block (5), and the outer side of the inner sealing block (4) fits the inner wall of the box body (1).

4. The intrinsically safe explosion-proof electric control box for mining according to claim 1 is characterized in that: The flow limiting sleeve (6) is internally fixedly sleeved with a flow dividing plate (8), the flow dividing plate (8) and the inner side of the flow limiting sleeve (6) are fixedly sleeved with a flow limiting ring (9), the inner wall of the flow limiting sleeve (6) is fixedly supported with a flow limiting plate (10), and the inner side of the flow limiting plate (10) is fixedly connected with a flow limiting spring (11).

5. The intrinsically safe explosion-proof electric control box for mining according to claim 1 is characterized in that: The pressure box (16) is internally fixedly supported with a pressure relief spring (17), the rear end of the pressure relief spring (17) is fixedly connected with a pressure relief plate (18), the rear wall of the pressure box (16) is provided with an exhaust port, the sealing sleeve (19) is internally fixedly supported with a sealing wax block (20), and the bottom wall of the sealing sleeve (19) is fixedly sleeved with a heat conducting block (21).

6. The intrinsically safe explosion-proof electric control box for mining according to claim 1 is characterized in that: A sealing ring (12) is fixedly mounted on one end of the one-way pipe (7), and a support ring (13) is fixedly mounted on the other end of the one-way pipe (7). A support spring (15) is fixedly supported on the inner side of the support ring (13), and a sealing sheet (14) is supported at the end of the support spring (15).

7. The intrinsically safe explosion-proof electric control box for mining according to claim 2 is characterized in that: The protective sleeve (26) is located outside the sealing block (22), the wire loop (25) is located inside the side sealing door (27), and the outer wall of the wire loop (25) is provided with uniform threading holes.

8. The intrinsically safe explosion-proof electric control box for mining according to claim 4 is characterized in that: A one-way pipe (7) inside the middle sealing block (3), the inner sealing block (4) and the outer sealing block (5) is located behind the flow limiting sleeve (6), and the inner side of the other one-way pipe (7) is connected to the inner cavity of the box body (1), and the one-way pipe (7) is located near the bottom of the flow limiting sleeve (6).

9. The intrinsically safe explosion-proof electric control box for mining according to claim 5 is characterized in that: The blocking sleeve (19) is located behind the pressure box (16) and is in close contact with the pressure box (16), and the front of the delivered sealing wax block (20) is in close contact with the rear of the pressure box (16) to block the exhaust port.

10. The intrinsically safe explosion-proof electric control box for mining according to claim 5, characterized in that: The heat conducting block (21) extends upward to the interior of the sealing wax block (20), and the heat conducting block (21) extends downward to below the sealing sleeve (19). The one-way pipe (7) on the top surface of the box body (1) is located behind the inner cavity pressure relief plate (18) of the pressure box (16).

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