Explosion-proof box shell and explosion-proof box

Abstract

The utility model relates to the field of explosion-proof boxes, and discloses an explosion-proof box shell and an explosion-proof box. The explosion-proof box shell comprises a shell body and at least one connecting piece, the shell body comprises a bottom plate, the bottom plate is provided with a mounting surface facing a fixed object, and the mounting surface is provided with a blocking structure; the connecting pieces are fixedly connected to the mounting face and used for being connected with a fixed object, and the blocking structure is arranged to abut against the side portion, facing the external force, of at least one connecting piece when the shell bears the external force parallel to the mounting face. The explosion-proof box shell is fixed on a fixed object through a connecting piece, and a blocking structure is arranged on the mounting surface. When the shell is subjected to external force parallel to the installation face, the blocking piece can abut against the side portion, facing the external force, of the connecting piece, relative displacement between the connecting piece and the shell is prevented, and therefore the position, fixedly connected with the connecting piece, of the bottom plate is prevented from being torn.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof box installation, in particular to an explosion-proof box shell and an explosion-proof box. Background Art

[0002] As an electrical device, explosion-proof box is mainly used in explosion-hazardous places containing flammable and explosive gases, steam, dust or fibers, and has the function of preventing explosions.

[0003] The explosion-proof box shell includes a shell and a plurality of connecting pieces, wherein the connecting pieces are fixedly connected to the bottom plate of the shell, and the connecting pieces are used to be fixedly connected to a fixed object (the fixed object is the ground or a wall, etc.).

[0004] In order to make the explosion-proof box as a whole lighter and improve its anti-corrosion performance, the shell of the explosion-proof box is made of plastic material. However, after the connector is fixed to the object, if the shell is subjected to an external force parallel to the installation surface, the part of the bottom plate connected to the connector is prone to cracking. Utility Model Content

[0005] The utility model aims to solve the problem that the connection and fixing position of the bottom plate of the explosion-proof box shell is prone to tearing.

[0006] In order to solve the above technical problems, the utility model provides an explosion-proof box shell, which includes a shell and at least one connecting piece. The shell includes a bottom plate, the bottom plate has a mounting surface facing the fixed object, and a blocking structure is provided on the mounting surface; the connecting piece is fixedly connected to the mounting surface and is used to connect with the fixed object, and the blocking structure is configured to be able to press against the side of at least one connecting piece facing the external force when the shell is subjected to an external force parallel to the mounting surface.

[0007] In some embodiments, the number of connecting members is four, and the four connecting members are distributed in a rectangular array, the blocking structure includes four blocking members, and the four blocking members correspond one by one to the four connecting members; the rectangular array has a first symmetry axis extending along its length direction and a second symmetry axis extending along its width direction; the first side of the connecting member facing the first symmetry axis and the second side of the connecting member facing the second symmetry axis are respectively in contact with the corresponding blocking members.

[0008] In some embodiments, the blocking member includes a first blocking segment extending along a direction parallel to the first symmetry axis and a second blocking segment extending along a direction parallel to the second symmetry axis, the first blocking segment and the second blocking segment are connected to the mounting surface and are connected to each other, the first blocking segment contacts the first side of the connecting member, and the second blocking segment contacts the second side of the connecting member.

[0009] In some embodiments, in a direction perpendicular to the thickness of the bottom plate, a ratio of the thickness of the blocking member to the thickness of the connecting member is 0.25-0.5; and / or a buffer layer is filled between the connecting member and the blocking member.

[0010] In some embodiments, the connecting member is provided with an arc transition portion between the first side portion and the second side portion, and the blocking member includes an arc blocking segment between the first blocking segment and the second blocking segment, and the arc blocking segment contacts the arc transition portion.

[0011] In some embodiments, in the length direction of the rectangular array, the ratio of the length of the first blocking segment to the length of the first side portion is 0.5-0.8; in the width direction of the rectangular array, the ratio of the length of the second blocking segment to the length of the second side portion is 0.5-0.8.

[0012] In some embodiments, the connecting member is connected to the base plate by bolts.

[0013] In some embodiments, four connection blocks are provided on a side of the bottom plate facing away from the fixed object, all bolts correspond to all connection blocks one by one, and the bolts extend from the bottom plate to the corresponding connection blocks.

[0014] In some embodiments, the length of the threaded section of the bolt is 2-4 times the thickness of the base plate.

[0015] Another aspect of the utility model provides an explosion-proof box, which comprises the explosion-proof box housing and electrical components of the above embodiment, wherein the electrical components are installed in the shell of the explosion-proof box housing.

[0016] The above technical solution of the utility model has the following beneficial effects:

[0017] The explosion-proof box shell is fixed to the object through a connector, and a blocking structure is provided on the mounting surface. When the shell is subjected to an external force parallel to the mounting surface, the blocking member can press against the side of the connector facing the external force to prevent relative displacement between the connector and the shell, thereby preventing the bottom plate from being torn at the position where it is connected and fixed to the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the explosion-proof box shell in one embodiment of the utility model;

[0019] Figure 2 It is a bottom schematic diagram of the explosion-proof box housing in one embodiment of the utility model;

[0020] Figure 3 yes Figure 2 A partial enlarged view of A in FIG.

[0021] Figure 4It is a schematic diagram of the contact between the blocking member and the connecting member in one embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the cooperation between the blocking member and the connecting member in one embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the cooperation between the blocking structure and the connecting piece in another embodiment of the utility model.

[0024] Description of Reference Numerals

[0025] 1. Base plate; 2. Connecting piece; 3. Blocking piece; 4. Threaded hole; 5. Bolt; 6. Connecting block; 7. Mounting surface; 8. Buffering pad layer; 821. First elastic protrusion; 831. First elastic layer; 822. Second elastic protrusion; 832. Second elastic layer; 9. First symmetry axis; 10. Second symmetry axis; 21. First side portion; 22. Second side portion; 31. First blocking section; 32. Second blocking section. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is described in detail below. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0027] In the present invention, unless otherwise stated, the directional words such as "upper" and "lower" usually refer to the orientation in the assembled state. "Inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The utility model provides an explosion-proof box housing, which includes a shell and at least one connecting member 2. The shell includes a bottom plate 1, the bottom plate 1 has a mounting surface 7 facing a fixed object, and a blocking structure is provided on the mounting surface 7; the connecting member 2 is fixedly connected to the mounting surface 7 and is used to connect with the fixed object, and the blocking structure is configured to be able to press against the side of at least one connecting member 2 facing the external force when the shell is subjected to an external force parallel to the mounting surface 7. Of course, the external force parallel to the mounting surface 7 can also be a component force of the external force applied to the shell in a direction parallel to the mounting surface 7.

[0030] Specifically, the explosion-proof box housing is fixed to a fixed object (such as the ground or a wall, etc.) through a connecting piece 2, and a blocking structure is provided on the mounting surface 7. When the housing is subjected to an external force parallel to the mounting surface 7, the blocking piece 3 can press against the side of the connecting piece 2 facing the external force to prevent relative displacement between the connecting piece 2 and the housing, thereby preventing the bottom plate 1 from being torn at the position where it is connected and fixed to the connecting piece 2.

[0031] It should be noted that the present invention does not limit the specific structural form of the blocking structure, as long as the above-mentioned technical effects can be achieved. For example, the blocking structure can be an L-shaped, U-shaped or rectangular annular convex block, which is installed on the mounting surface 7, and the connecting end of the connector 2 contacts the blocking structure so that the connector 2 can form a pressure against the blocking structure. For another example, the blocking structure can also be a rectangular groove arranged on the base plate 1, and the connecting end of the connector 2 is installed in the groove, and the connecting end of the connector 2 contacts the groove wall of the groove so that the connector 2 can form a pressure against the blocking structure.

[0032] like Figure 6 As shown, in some embodiments, the blocking structure may include a square cylindrical projection, the number of the connector 2 is one, the blocking structure completely surrounds the connection end of the connector 2, and the inner side of the blocking structure contacts the outer periphery of the connection end of the connector 2. When the housing is subjected to an external force parallel to the mounting surface 7, regardless of the direction of the external force, the blocking structure can press against the side of the connector 2 facing the external force. In addition, if the number of the connector 2 is more than one, the blocking structure may include a corresponding number of square cylindrical projections, so that each connector 2 can be matched with a square cylindrical projection.

[0033] like Figure 2 As shown, in some embodiments of the present invention, the number of the connecting members 2 is four, and the four connecting members 2 are distributed in a rectangular array, and the blocking structure includes four blocking members 3, and the four blocking members 3 correspond to the four connecting members 2 one by one.

[0034] Specifically, the mounting surface 7 may be rectangular, and the connectors 2 and the blocking members 3 are distributed at the four corners of the mounting surface 7. The blocking member 3 is a block-shaped protrusion, and the blocking member 3 contacts the connector 2. When the housing is subjected to an external force parallel to the mounting surface 7, there are always two connectors 2 that can play a blocking role.

[0035] In other embodiments, the connectors 2 and the blocking members 3 may be arranged at the midpoint of each side of the rectangular mounting surface 7. In still other embodiments, the mounting surface 7 may also be arranged as a circular surface, and the connectors 2 and the blocking members 3 may be arranged at positions that can divide the circular arc of the circular mounting surface 7 into equal parts.

[0036] like Figure 2 As shown, in some embodiments of the present invention, four connecting members 2 are distributed in a rectangular array, and the rectangular array has a first symmetry axis 9 extending along its length direction and a second symmetry axis 10 extending along its width direction. The first side portion 21 of the connecting member 2 facing the first symmetry axis 9 and the second side portion 22 of the connecting member 2 facing the second symmetry axis 10 are in contact with the corresponding blocking member 3 respectively. When the shell is subjected to external force, if the direction of the external force is along the first symmetry axis 9, the second side 22 of the connecting member 2 faces the external force, and the second side 22 of the connecting member 2 is pressed against the blocking member 3; if the direction of the external force is consistent with the extension direction of the second symmetry axis 10, the first side 21 of the connecting member 2 faces the external force, and the first side 21 of the connecting member 2 is pressed against the blocking member 3; if the external force is along the diagonal of the rectangular array, at this time, the two vertical components of the external force are respectively along the first symmetry axis 9 and the second symmetry axis 10, the first side 21 and the second side 22 are respectively facing the two components of the external force, and the first side 21 and the second side 22 of the connecting member 2 can both be pressed against the blocking member 3.

[0037] like Figure 3 As shown, in some embodiments of the present invention, the blocking member 3 includes a first blocking segment 31 extending in a direction parallel to the first symmetry axis 9 and a second blocking segment 32 extending in a direction parallel to the second symmetry axis 10, the first blocking segment 31 and the second blocking segment 32 are connected to the mounting surface 7 and are connected to each other, the first blocking segment 31 is in contact with the first side portion 21 of the connecting member 2, and the second blocking segment 32 is in contact with the second side portion 22 of the connecting member 2.

[0038] In this embodiment, the blocking member 3 is configured to be L-shaped, and the first side portion 21 of the connecting member 2 contacts the first blocking section 31 of the blocking member 3; the second side portion 22 of the connecting member 2 contacts the second blocking section 32 of the blocking member 3. When the housing is subjected to an external force parallel to the mounting surface 7, if the direction of the external force is along the second symmetric axis 10, the first side portion 21 faces the external force, and since the first side portion 21 contacts the first blocking section 31, the first blocking section 31 presses against the first side portion 21. If the direction of the external force is along the first symmetric axis 9, the second side portion 22 faces the external force, and since the second side portion 22 contacts the second blocking section 32, the second blocking section 32 presses against the second side portion 22. If the external force is along the diagonal of the rectangular array, the first side portion 21 and the second side portion 22 respectively face the two perpendicular components of the external force, the first blocking section 31 presses against the first side portion 21, and the second blocking section 32 presses against the second side portion 22.

[0039] In some embodiments of the present invention, the ratio of the thickness of the blocking member 3 to the thickness of the connecting member 2 is 0.25-0.5 in a direction perpendicular to the thickness of the bottom plate 1. This arrangement can make the blocking member 3 have sufficient force strength without excessively increasing the production cost.

[0040] In some embodiments of the present invention, a cushion layer 8 is filled between the connector 2 and the blocking member 3. Specifically, one side of the cushion layer 8 is connected to the connector 2, and the other side of the cushion layer 8 is connected to the blocking member 3. The cushion layer 8 enables flexible contact between the connector 2 and the blocking member 3 to prevent damage to the two due to extrusion. At the same time, such a setting is also for the consideration of enhancing the force strength of the blocking member 3. The cushion layer 8 can be made of elastic materials such as silicone and rubber.

[0041] like Figure 5As shown, in some embodiments of the utility model, the first side portion 21 is provided with a first elastic protrusion 821, the first blocking section 31 is provided with a first elastic layer 831, the first elastic layer 831 is provided with a first slot, the first elastic protrusion 821 is embedded in the first slot, and the first elastic protrusion 821 contacts the surface of the first slot. The second side portion 22 is provided with a second elastic protrusion 822, the second blocking section 32 is provided with a second elastic layer 832, the second elastic layer 832 is provided with a second slot, the second elastic protrusion 822 is embedded in the second slot, and the second elastic protrusion 822 contacts the surface of the second slot. When the shell is subjected to a force that causes it to rotate, the first elastic protrusion 821 can be pressed against the corresponding side of the first slot, and the second elastic protrusion 822 can be pressed against the corresponding side of the second slot, which helps the shell to return quickly and prevents the explosion-proof box bottom plate 1 from being torn due to torsion. Of course, the purpose of buffering and enhancing the strength of the force can also be achieved. Preferably, the surface of the first elastic protrusion 821 and the groove wall of the first slot are configured as arc surfaces, and the second elastic protrusion 822 and the groove wall of the second slot are also configured as arc surfaces, so as to facilitate the adaptation of the two.

[0042] like Figure 2 As shown, in some embodiments of the utility model, the connecting member 2 and the blocking member 3, the connecting member 2 is provided with an arc transition portion located between the first side portion 21 and the second side portion 22, the blocking member 3 includes an arc blocking segment located between the first blocking segment 31 and the second blocking segment 32, and the arc blocking segment contacts the arc transition portion. The cooperation between the arc blocking segment and the arc transition portion can reduce the stress concentration phenomenon. In other embodiments, the arc transition portion and the arc blocking segment are wrapped with a material with higher strength, such as steel.

[0043] In some embodiments of the present invention, in the length direction of the rectangular array, the ratio of the length of the first blocking segment 31 to the length of the first side portion 21 is 0.5-0.8; in the width direction of the rectangular array, the ratio of the length of the second blocking segment 32 to the length of the second side portion 22 is 0.5-0.8.

[0044] In this embodiment, the lengths of the first blocking section 31 and the second blocking section 32 are longer, the contact area between the first blocking section 31 and the first side portion 21 is increased, and the contact area between the second blocking section 32 and the second side portion 22 is increased, which helps to improve the blocking effect.

[0045] like Figure 4 As shown, bolts 5 are used to fix the connector 2 on the base plate 1. This is because the use of fastening bolts to connect has low production costs and is easy to use and maintain. Of course, welding, adhesive bonding, fastening bolt connection, etc. can be selected for the connection between the connector 2 and the base plate 1, and the utility model does not limit this.

[0046] In some embodiments, for the purpose of aesthetics and flatness, the bolt 5 is set as a countersunk bolt. In other embodiments, the thread of the bolt 5 can be a coarse thread with high thread strength and good interchangeability.

[0047] In some embodiments of the utility model, four connecting blocks 6 are arranged on the side of the base plate 1 facing away from the fixed object, threaded holes 4 are provided on the connecting blocks 6, all bolts 5 correspond one-to-one to all connecting blocks 6, and the bolts 5 extend from the base plate 1 to the corresponding connecting blocks 6.

[0048] Specifically, the bottom plate 1 has a mounting surface 7 facing the connector 2 and a back side facing away from the connector 2, and the connecting block 6 is mounted on the back side of the bottom plate 1. Accordingly, the back side of the bottom plate 1 may also be rectangular. The connecting blocks 6 are located at the four corners of the rectangular back side of the mounting surface 7, and the position of the connecting blocks 6 matches the position of the connector 2. The connecting blocks 6 can partially thicken the portion of the bottom plate 1 connected to the connector 2 to increase its structural strength.

[0049] In some embodiments of the present invention, the length of the bolt 5 should be adapted to the thickness of the connecting block 6. In addition, the bolt 5 has a threaded section, the portion of the threaded section that is threadedly connected to the connecting block 6 is the threaded connection section, and the length of the threaded connection section is 2-4 times the thickness of the bottom plate 1.

[0050] The utility model also provides an explosion-proof box, which includes the explosion-proof box housing and electrical components in the above embodiment. In addition to the basic components, other components can be added according to the different uses of the distribution box and the use requirements of the distribution box, such as: background monitoring system, intelligent fire evacuation lighting and background monitoring system, electrical fire / leakage monitoring detector and background monitoring system, EPS power battery, etc. The explosion-proof box uses the above explosion-proof box housing and also has the advantages of high force strength and tear resistance.

[0051] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0053] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An explosion-proof box housing, characterized in that: The invention comprises a shell and at least one connecting member (2), wherein the shell comprises a bottom plate (1), the bottom plate (1) having a mounting surface (7) facing an object to be fixed, and a blocking structure is provided on the mounting surface (7); the connecting member (2) is fixedly connected to the mounting surface (7) and is used to connect to the object to be fixed, and the blocking structure is arranged to be able to press against a side of at least one connecting member (2) facing the external force when the shell is subjected to an external force parallel to the mounting surface (7).

2. The explosion-proof box housing according to claim 1, characterized in that: The number of the connecting members (2) is four, and the four connecting members (2) are distributed in a rectangular array, the blocking structure comprises four blocking members (3), and the four blocking members (3) correspond one to one to the four connecting members (2); The rectangular array has a first symmetry axis (9) extending along its length direction and a second symmetry axis (10) extending along its width direction; a first side portion (21) of the connecting member (2) facing the first symmetry axis (9) and a second side portion (22) of the connecting member (2) facing the second symmetry axis (10) are respectively in contact with the corresponding blocking member (3).

3. The explosion-proof box housing according to claim 2, characterized in that: The blocking member (3) comprises a first blocking section (31) extending in a direction parallel to the first symmetry axis (9) and a second blocking section (32) extending in a direction parallel to the second symmetry axis (10), the first blocking section (31) and the second blocking section (32) being connected to the mounting surface (7) and connected to each other, the first blocking section (31) being in contact with the first side portion (21) of the connecting member (2), and the second blocking section (32) being in contact with the second side portion (22) of the connecting member (2).

4. The explosion-proof box housing according to claim 3, characterized in that: In a direction perpendicular to the thickness of the bottom plate (1), the ratio of the thickness of the blocking member (3) to the thickness of the connecting member (2) is 0.25-0.5; And / or, a buffer layer (8) is filled between the connecting member (2) and the blocking member (3).

5. The explosion-proof box housing according to claim 3, characterized in that: The connecting member (2) is provided with a circular arc transition portion located between the first side portion (21) and the second side portion (22); the blocking member (3) comprises a circular arc blocking segment located between the first blocking segment (31) and the second blocking segment (32); the circular arc blocking segment is in contact with the circular arc transition portion.

6. The explosion-proof box housing according to claim 3, characterized in that: In the length direction of the rectangular array, the ratio of the length of the first blocking section (31) to the length of the first side portion (21) is 0.5-0.8; In the width direction of the rectangular array, the ratio of the length of the second blocking section (32) to the length of the second side portion (22) is 0.5-0.

8.

7. The explosion-proof box housing according to any one of claims 2 to 6, characterized in that: The connecting member (2) is connected to the base plate (1) via bolts (5).

8. The explosion-proof box housing according to claim 7, characterized in that: Four connecting blocks (6) are provided on a side of the bottom plate (1) facing away from the object to be fixed, all the bolts (5) correspond to all the connecting blocks (6) one by one, and the bolts (5) extend from the bottom plate (1) to the corresponding connecting blocks (6).

9. The explosion-proof box housing according to claim 8, characterized in that: The length of the threaded connection section of the bolt (5) is 2-4 times the thickness of the base plate (1).

10. An explosion-proof box, characterized in that: The invention comprises an electrical component and an explosion-proof box housing according to any one of claims 1 to 9, wherein the electrical component is installed in a shell of the explosion-proof box housing.

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