An explosion-proof electrical box

Abstract

The utility model relates to an explosion -proof electrical box. Including main box and the vice box body of being located its side part, be equipped with the inside partition of box between the inner chamber of both main box and vice box body, form the equipment cavity in main box, the inside of vice box forms the wiring cavity, the front part of main box is open and is equipped with the main box door of openable and the locking assembly of locking to it, the front part and rear part of vice box are equipped with the door mouth and are installed detachable vice box front box door on the front door mouth, are installed vice box back box door on the rear door mouth, install a plurality of inside wiring terminal in the upper portion of inside partition of box, install a group of inside power terminal in the lower portion of inside partition of box, be equipped with a plurality of cable sealing joint on the side wall of vice box body, be equipped with a plurality of explosion -proof button on main box door. The utility model provides an explosion -proof electrical box, divides different space in the inside, promotes the neatness and operation convenience of wiring connection.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof equipment technology, and in particular relates to an explosion-proof electrical box. Background Technology

[0002] Explosion-proof electrical boxes are typically used in environments requiring explosion-proof and flameproof capabilities. Components that could potentially become ignition sources in flammable or explosive locations need to be isolated from the external environment using explosion-proof electrical boxes to enhance safety. The internal components of an explosion-proof electrical box include electrical control components such as the main control circuit board, push-button circuit boards, and residual current devices (RCDs), and it must also provide wiring functionality for connection to external circuits.

[0003] Existing explosion-proof electrical boxes typically have only a single internal chamber where various electrical control components are installed. External cables are directly introduced into the box and connected directly to the internal components, exposing the components and wiring when the box door is opened. This design has the following drawbacks: Equipment installation, commissioning, or troubleshooting of internal components or wiring often involves reconnecting cables to internal components. The aforementioned method of arranging and wiring within the same chamber is usually cumbersome and results in messy cabling, hindering troubleshooting. Therefore, a new design for the structure of explosion-proof electrical boxes is needed. Summary of the Invention

[0004] The purpose of this utility model is to provide an explosion-proof electrical box that divides the interior into different spaces, improving the neatness of wiring connections and the convenience of operation.

[0005] The technical solution adopted by this utility model is as follows: an explosion-proof electrical box, including a main box and a secondary box located on its side, with an internal partition between the inner cavities of the main box and the secondary box, forming an equipment cavity in the main box and a wiring cavity in the secondary box, the front of the main box being open and equipped with an openable main box door and a locking component for locking it, the secondary box having doors at both the front and rear, with a detachable front door at the front door and a rear door at the rear door; multiple internal wiring terminals are installed on the upper part of the internal partition, and a set of internal power terminals are installed on the lower part of the internal partition; multiple cable sealing joints are provided on the side wall of the secondary box, and multiple explosion-proof buttons are provided on the main box door.

[0006] Preferably, an internal mounting bracket is installed and fixed inside the main enclosure, and an internal mounting plate for installing internal components is installed on the internal mounting bracket. The internal components are installed and fixed on the internal mounting plate, and the internal components are connected to the wiring terminals and / or power terminals inside the enclosure. Cables introduced into the enclosure through cable sealing connectors are connected to the wiring terminals and / or power terminals inside the enclosure.

[0007] Preferably, terminal markings are provided on the partitions inside the enclosure, near the wiring terminals and power terminals inside the enclosure, connector markings are provided on the side walls of the sub-enclosure and near each cable sealing joint, and button markings are provided on the main enclosure door and near each explosion-proof button.

[0008] Preferably, a door frame is provided on the front opening of the main body, the main door includes a door body and a sealing gasket is provided between the door frame and the door body, and after the door body is closed, the locking assembly locks the door body and the door frame together.

[0009] Preferably, the locking assembly includes two upper and lower pivot seats fixedly mounted on the side of the door frame, a door hinge fixedly mounted on the two pivot seats, a base provided on the upper and lower parts of the door hinge, a side connecting seat installed at a corresponding position on the same side edge of the door body and fixedly connected to the corresponding base, a locking mechanism provided between the door body and the door frame, and the locking assembly also includes an operating mechanism for operating the main door to move up and down.

[0010] Preferably, the locking mechanism includes an inverted U-shaped top coupling seat installed on the top of the door body and an inverted L-shaped side coupling seat installed on the side of the door body. A side card seat is installed at a corresponding position on the side of the door frame. When the main door is closed, the operating component drives the main door to move downward, and the top coupling seat engages with the top edge of the door frame, and the side coupling seat engages with the side card seat.

[0011] Preferably, the operating mechanism includes an eccentric turntable hinged to the upper base, the bottom of the eccentric turntable contacting the upper bearing seat, and an operating lever mounted on the eccentric turntable.

[0012] Preferably, the side edge of the front door of the auxiliary compartment is hinged to the auxiliary compartment body, and after the front door of the auxiliary compartment is closed, it is fixedly connected to the auxiliary compartment body with multiple bolts. A sealing gasket is provided between the front door of the auxiliary compartment and the auxiliary compartment body. The side edge of the rear door of the auxiliary compartment is hinged to the auxiliary compartment body, and after the rear door of the auxiliary compartment is closed, it is fixedly connected to the auxiliary compartment body with multiple bolts. A sealing gasket is provided between the rear door of the auxiliary compartment and the auxiliary compartment body.

[0013] Preferably, it also includes a bottom bracket, and the bottoms of both the main housing and the auxiliary housing are fixedly connected to the bottom bracket.

[0014] The advantages and positive effects of this utility model are: This invention provides an explosion-proof electrical box. Compared with existing explosion-proof electrical boxes, the explosion-proof electrical box of this invention has an internal partition between the main box and the auxiliary box, thus forming an equipment cavity for installing internal components and a wiring cavity for wiring operations inside the explosion-proof electrical box. During equipment installation, commissioning, and troubleshooting operations, the main box door, or the front and rear doors of the auxiliary box, can be opened as needed to open the main box or the auxiliary box for corresponding equipment installation, commissioning, and troubleshooting operations.

[0015] This explosion-proof electrical box features internal wiring terminals and power terminals on its internal partitions, and cable sealing connectors on the side of the sub-box. The cables of internal components located within the equipment cavity connect to these internal wiring and power terminals. Cables passing through the cable sealing connectors into the box also connect to these terminals. This improves the neatness of the wiring within the explosion-proof electrical box, making cable extension and wiring more orderly and preventing clutter. The aforementioned method of using internal wiring terminals and power terminals for internal wiring connections enhances the ease of operation, facilitating efficient equipment installation, commissioning, and troubleshooting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external three-dimensional structure of this utility model, from a frontal view. Figure 2 This is a schematic diagram of the external three-dimensional structure of this utility model, from a rear view. Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a structural schematic diagram of the main door and locking assembly of this utility model.

[0017] In the picture: 1. Main enclosure; 2. Main enclosure door; 2-1. Enclosure door body; 2-2. Top connecting seat; 2-3. Side connecting seat; 2-4. Side connecting seat; 3. Locking assembly; 3-1. Shaft seat; 3-2. Door hinge; 3-3. Base; 3-4. Side card seat; 3-5. Eccentric turntable; 3-6. Operating lever; 4. Explosion-proof button; 5. Sub-enclosure; 6. Sub-enclosure front door; 7. Sub-enclosure rear door; 8. Bottom bracket; 9. Main enclosure door frame; 10. Cable sealing connector; 11. Internal mounting plate; 12. Internal wiring terminal; 13. Internal partition; 14. Internal power terminal; 15. Internal mounting rack. Detailed Implementation

[0018] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0019] Please see Figure 1 and Figure 2 The explosion-proof electrical box of this utility model includes a main box body 1 and a secondary box body 5 located on its side. An internal partition 13 is provided between the inner cavities of the main box body 1 and the secondary box body 5. An equipment cavity is formed inside the main box body 1, and a wiring cavity is formed inside the secondary box body 5. The equipment cavity is used to install the internal components of the electrical box, such as the main control circuit board, the button circuit board, and the leakage current protection device, while the wiring cavity is used for wiring and connection.

[0020] As shown in the figure, the thickness of the auxiliary box 5 is less than the thickness of the main box 1. Specifically, the bottom wall, top wall and rear wall of both the main box 1 and the auxiliary box 5 are made of the same metal plate, and the internal partition 13 is installed at the junction of the inner cavities of the main box 1 and the auxiliary box 5.

[0021] The front of the main compartment 1 is open and is equipped with an openable main compartment door 2 and a locking assembly 3 for locking it. The front and rear of the secondary compartment 5 are equipped with doors, and a detachable secondary compartment front door 6 is installed on the front door and a secondary compartment rear door 7 is installed on the rear door.

[0022] Please see Figure 3 and Figure 4 It can be seen that: In this embodiment, a door frame 9 is provided on the front opening of the main enclosure 1. The main enclosure door 2 includes a door body 2-1, and a sealing gasket is provided between the door frame 9 and the door body 2-1. After the door body 2-1 is closed, the locking assembly 3 locks the door body 2-1 and the door frame 9 together. When it is necessary to open the main enclosure door 2, the locking state of the main enclosure door 2 by the locking assembly 3 is first released. The purpose of setting the aforementioned sealing gasket is to improve the overall sealing effect of the electrical box after the main enclosure door 2 is closed, so as to ensure the explosion-proof characteristics.

[0023] The locking assembly 3 includes two upper and lower pivot seats 3-1 fixedly mounted on the side of the door frame 9. A door hinge 3-2 is fixedly mounted on the two pivot seats 3-1. Bases 3-3 are provided on the upper and lower parts of the door hinge 3-2. A side connecting seat 2-4 is installed at a corresponding position on the same side edge of the door body 2-1, and the side connecting seat 2-4 is fixedly connected to the corresponding base 3-3. In this way, the main door 2 and the door frame 9 are pivotally connected. When the main door 2 is opened, the main door 2 rotates around the door hinge 3-2.

[0024] A locking mechanism is also provided between the door body 2-1 and the door frame 9. The locking assembly 3 also includes an operating mechanism for moving the main door 2 up and down.

[0025] In this embodiment, the locking mechanism includes an inverted U-shaped top coupling seat 2-2 installed on the top of the door body 2-1 and an inverted L-shaped side coupling seat 2-3 installed on the side of the door body 2-1. A side locking seat 3-4 is installed at a corresponding position on the side of the door frame 9. When the main door 2 is closed, the operating component drives the main door 2-1 to move downwards, engaging the top coupling seat 2-2 with the top edge of the door frame 9 and engaging the side coupling seat 2-3 with the side locking seat 3-4, thus reliably locking the main door 2. When the main door 2 needs to be opened, the operating component first drives the main door 2-1 to move upwards. At this time, the top coupling seat 2-2 disengages from the top edge of the door frame 9, and the side coupling seat 2-3 disengages from the side locking seat 3-4, after which the main door 2 can be rotated and opened.

[0026] In this embodiment, the operating mechanism includes an eccentric turntable 3-5 hinged to the upper base 3-3. The bottom of the eccentric turntable 3-5 contacts the upper bearing 3-1. An operating lever 3-6 is also mounted on the eccentric turntable 3-5, and the eccentric turntable 3-5 is rotated by the operating lever 3-6. Specifically, as follows... Figure 4 As shown, the upper base 3-3 has a U-shaped groove, and the eccentric turntable 3-5 is located in this U-shaped groove. Before opening the door, the operating lever 3-6 is raised first, and the eccentric turntable 3-5 rotates counterclockwise, increasing the distance between the base 3-3 and the shaft seat 3-1. At this time, the main box door 2 is lifted to a certain height. At this time, the top connecting seat 2-2 separates from the door frame 9, and the side connecting seat 2-3 separates from the side card seat 3-4. When closing the door, the main box door 2 is closed first, and then the operating lever 3-6 is lowered, so that the top connecting seat 2-2 reconnects with the door frame 9 and the side connecting seat 2-3 reconnects with the side card seat 3-4.

[0027] In this embodiment, the side edge of the front door 6 of the auxiliary compartment is hinged to the auxiliary compartment body 5. After the front door 6 is closed, it is fixedly connected to the auxiliary compartment body 5 with multiple bolts. A sealing gasket is provided between the front door 6 and the auxiliary compartment body 5. In this embodiment, the side edge of the rear door 7 of the auxiliary compartment is hinged to the auxiliary compartment body 5. After the rear door 7 is closed, it is fixedly connected to the auxiliary compartment body 5 with multiple bolts. A sealing gasket is provided between the rear door 7 and the auxiliary compartment body 5.

[0028] When it is necessary to open the front door 6 or the rear door 7 of the auxiliary enclosure, the bolts between them and the auxiliary enclosure body 5 must be removed first, and then the door can be opened by rotating it around its respective hinge. In this embodiment, handles are provided on both the front door 6 and the rear door 7 of the auxiliary enclosure to make them easier to operate. The sealing gaskets between the front door 6 or the rear door 7 of the auxiliary enclosure and the auxiliary enclosure body 5 are used to improve the overall sealing effect of the electrical enclosure after the front door 6 or the rear door 7 of the auxiliary enclosure is closed, so as to ensure the explosion-proof characteristics.

[0029] Multiple internal wiring terminals 12 are installed on the upper part of the internal partition 13, and a set of internal power terminals 1 are installed on the lower part of the internal partition 13. Multiple cable sealing connectors 10 are provided on the side wall of the auxiliary enclosure 5, and multiple explosion-proof buttons 4 are provided on the main enclosure door 2. Among them, the internal wiring terminals 12 are used for internal wiring, the internal power terminals 1 are used for internal power connection, and the explosion-proof buttons 4 are used for button operation of the internal components in the equipment cavity.

[0030] In this embodiment, an internal mounting bracket 15 is installed and fixed inside the main housing 1. An internal mounting plate 11 for installing internal components is installed on the internal mounting bracket 15. The internal components are installed and fixed on the internal mounting plate 11 and are connected to the internal wiring terminals 12 and / or the internal power terminals 14. Cables introduced into the housing through cable sealing connectors 10 are connected to the internal wiring terminals 12 and / or the internal power terminals 14. When wiring is performed inside the housing, the cable terminals of the internal components are connected to the internal wiring terminals 12 and / or the internal power terminals 14 inside the housing. When external wiring is performed, power supply cables and signal cables are introduced into the housing through cable sealing connectors 10 and then connected to the internal wiring terminals 12 and / or the internal power terminals 14 on the internal partition 13.

[0031] In this embodiment, terminal markings are provided on the internal partition 13, near the internal wiring terminals 12 and the internal power terminals 14; connector markings are provided on the side wall of the sub-box 5, near each cable sealing connector 10; and button markings are provided on the main box door 2, near each explosion-proof button 4. These markings can be printed or handwritten labels, affixed to their respective locations to provide wiring instructions for operators.

[0032] The cable sealing connector 10 includes a base sleeve with internal threads installed on the side wall of the sub-box 5. The base sleeve contains sealing filler and a pressure ring. A lock nut is installed at the end of the base sleeve. When threading the cable, the cable is passed through the lock nut, pressure ring and sealing filler. Then the lock nut is rotated from the outside. The lock nut pushes the pressure ring. After the pressure ring is displaced, it compresses the sealing filler. The sealing filler is deformed by the compression, sealing the cable channel and achieving an explosion-proof sealing effect.

[0033] In this embodiment, a bottom bracket 8 is also included, with the bottoms of both the main enclosure 1 and the auxiliary enclosure 5 fixedly connected to the bottom bracket 8. The purpose of the bottom bracket 8 is to fix and support the explosion-proof electrical box during on-site installation and use, thereby improving its stability.

Claims

1. An explosion-proof electrical box, characterized in that: The enclosure includes a main enclosure (1) and a secondary enclosure (5) located on its side. An internal partition (13) is provided between the inner cavities of the main enclosure (1) and the secondary enclosure (5). An equipment cavity is formed inside the main enclosure (1), and a wiring cavity is formed inside the secondary enclosure (5). The front of the main enclosure (1) is open and is equipped with an openable main enclosure door (2) and a locking assembly (3) for locking it. Doors are provided at the front and rear of the secondary enclosure (5). A detachable front door (6) of the secondary enclosure is installed on the front door and a rear door (7) of the secondary enclosure is installed on the rear door. Multiple internal wiring terminals (12) are installed on the upper part of the internal partition (13), and a set of internal power terminals (14) are installed on the lower part of the internal partition (13). Multiple cable sealing connectors (10) are provided on the side wall of the secondary enclosure (5), and multiple explosion-proof buttons (4) are provided on the main enclosure door (2).

2. The explosion-proof electrical box as described in claim 1, characterized in that: An internal mounting bracket (15) is installed and fixed inside the main enclosure (1). An internal mounting plate (11) for installing internal components is installed on the internal mounting bracket (15). The internal components are installed and fixed on the internal mounting plate (11). The internal components are connected to the wiring terminals (12) and / or the power terminals (14) inside the enclosure. Cables introduced into the enclosure through the cable sealing connector (10) are connected to the wiring terminals (12) and / or the power terminals (14) inside the enclosure.

3. The explosion-proof electrical box as described in claim 2, characterized in that: in Terminal markings are provided on the partition (13) inside the box, near the wiring terminals (12) inside the box and the power terminals (14) inside the box. On the side wall of the sub-box (5), near each cable sealing joint (10), there are joint markings. On the main box door (2), near each explosion-proof button (4), there are button markings.

4. The explosion-proof electrical box as described in claim 3, characterized in that: A door frame (9) is provided on the front opening of the main box (1). The main box door (2) includes a box door body (2-1) and a sealing gasket is provided between the door frame (9) and the box door body (2-1). After the box door body (2-1) is closed, the locking assembly (3) locks the box door body (2-1) and the door frame (9) together.

5. The explosion-proof electrical box as described in claim 4, characterized in that: The locking assembly (3) includes two upper and lower pivot seats (3-1) installed and fixed on the side of the door frame (9). A door hinge (3-2) is installed and fixed on the two pivot seats (3-1). A base (3-3) is provided on the upper and lower parts of the door hinge (3-2). A side connecting seat (2-4) is installed at the corresponding position on the same side edge of the door body (2-1) and the side connecting seat (2-4) is fixedly connected to the corresponding base (3-3). A locking mechanism is also provided between the door body (2-1) and the door frame (9). The locking assembly (3) also includes an operating mechanism for moving the main door (2) up and down.

6. The explosion-proof electrical box as described in claim 5, characterized in that: The locking mechanism includes an inverted U-shaped top coupling seat (2-2) installed on the top of the door body (2-1) and an inverted L-shaped side coupling seat (2-3) installed on the side of the door body (2-1). A side bracket (3-4) is installed at the corresponding position on the side of the door frame (9). When the main door (2) is closed, the operating component drives the main door (2) to move downward. The top coupling seat (2-2) engages with the top edge of the door frame (9), and the side coupling seat (2-3) engages with the side bracket (3-4).

7. The explosion-proof electrical box as described in claim 6, characterized in that: The operating mechanism includes an eccentric turntable (3-5) hinged to the upper base (3-3), the bottom of the eccentric turntable (3-5) is in contact with the upper bearing seat (3-1), and an operating lever (3-6) is also installed on the eccentric turntable (3-5).

8. The explosion-proof electrical box as described in claim 7, characterized in that: The side edge of the front door (6) of the auxiliary box is hinged to the auxiliary box body (5). After the front door (6) of the auxiliary box is closed, it is fixedly connected to the auxiliary box body (5) with multiple bolts. A sealing gasket is provided between the front door (6) of the auxiliary box and the auxiliary box body (5). The side edge of the rear door (7) of the auxiliary box is hinged to the auxiliary box body (5). After the rear door (7) of the auxiliary box is closed, it is fixedly connected to the auxiliary box body (5) with multiple bolts. A sealing gasket is provided between the rear door (7) of the auxiliary box and the auxiliary box body (5).

9. The explosion-proof electrical box as described in claim 8, characterized in that: It also includes a bottom bracket (8), and the bottom of the main body (1) and the auxiliary body (5) are fixedly connected to the bottom bracket (8).

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