Electrical box and prefabricated substation

Abstract

The invention relates to the technical field of substations, in particular to an electrical box and a prefabricated substation. The electrical box comprises a box body, a cable penetrating plate is arranged at the bottom of the box body, the cable penetrating plate is located above a bottom frame of the box body, a containing space is reserved on the lower side of the cable penetrating plate, a cable fixing structure is installed in the containing space, the cable fixing structure comprises a cable support, and a locking structure is arranged on the cable support. And the cable bracket is movably mounted on the box body, can be accommodated in the accommodating space and extends below the bottom frame of the box body. The cable fixing structure is located outside the box body, so that the internal space of the box body is saved, the distance between the locking structure and the cable connecting terminal is increased, the installation requirement that the cable has a large bending radius can be met, and the cable is more convenient to install. When the cable support is not used, the cable support is contained in the containing space, placement and transportation are not affected, and when the cable support is used, the cable support extends below the bottom frame of the box body, so that the accident problem caused by the fact that the cable in the foundation is too long and cannot be fixed is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substations, and in particular to an electrical box and a prefabricated transformer substation. Background Art

[0002] At present, the structure of prefabricated substation is usually as follows Figure 1 As shown, it includes an electrical box and electrical equipment installed in the electrical box. The electrical box includes a box body 1, a cable chamber 2 is provided in the box body 1, a cable threading plate 3 is provided at the bottom of the box body, and a cable through-hole 301 is provided on the cable threading plate 3 for the cable to enter and exit. The end of the cable extending into the box body 1 is connected to the cable connection terminal 4. Since the cable itself is heavy, in order to avoid the cable pulling on the cable connection terminal and causing the cable connection terminal to be damaged, a cable fixing structure is usually configured to fix and support the cable. In order to avoid the cable fixing structure occupying the space below the box body, resulting in an uneven bottom of the box body, which affects placement and transportation, the cable fixing structure is generally located inside the product and above the cable threading plate. The specific cable fixing structure includes a cable bracket 5, and the cable bracket 5 is provided with a plurality of clamp mounting holes 501. A clamp 6 is installed in the clamp mounting hole 501, and the cable is clamped and fixed on the cable bracket 5 by the clamp 6.

[0003] Outdoor substations need to consider green development requirements such as construction environmental pollution and land occupation. The factory prefabrication of box transformers and cabins is getting higher and higher, and the product design is getting more and more compact, resulting in a smaller and smaller space inside the box. In addition, the cable fixing structure is set inside the box, and the clamp is close to the cable connection terminal, resulting in the installation space being unable to meet the requirements of a larger cable bending radius, making cable installation inconvenient and the cable connection terminal easily stressed. In addition, during on-site construction, the box is generally not placed directly on the ground, but is equipped with a foundation. The box is placed on the foundation, and the bottom frame of the box is in contact with and fixed to the foundation. This results in the situation where the cable in the foundation is too long and not fixed, which leads to frequent accidents. Summary of the invention

[0004] The object of the present invention is to provide an electrical box to solve the problem that the existing cable fixing structure is arranged inside the box, which makes the cable installation inconvenient and the cables in the foundation are too long to be fixed, causing accidents; the object of the present invention is also to provide a prefabricated substation to solve the problem that the cable fixing structure of the prefabricated substation in the prior art is arranged inside the box, which makes the cable installation inconvenient and the cables in the foundation are too long to be fixed, causing accidents.

[0005] To achieve the above purpose, the electrical box of the present invention adopts the following technical solutions:

[0006] An electrical box comprises a box body, a cable installation plate is provided at the bottom of the box body, the cable installation plate is located above the bottom frame of the box body and a storage space is reserved at the lower side thereof, a cable fixing structure is installed in the storage space, the cable fixing structure comprises a cable bracket, the cable bracket is provided with a locking structure for locking the cable on the cable bracket, the cable bracket is movably installed on the box body and can be stored in the storage space and extend below the bottom frame of the box body.

[0007] Beneficial effects: The electrical box of the present invention is improved on the basis of the existing electrical box, the cable installation plate is arranged above the bottom frame of the box body and a storage space is reserved on the lower side of the cable installation plate, the cable fixing structure is installed in the storage space, and the cable fixing structure is located outside the box body, thereby saving the internal space of the box body and increasing the distance between the locking structure and the cable connection terminal, so that the installation requirements of the cable with a large bending radius can be met, making the cable installation more convenient and making the cable connection terminal less stressed. Since the cable holder is movably installed on the box body, the cable holder can be stored in the storage space reserved on the lower side of the cable installation plate when not in use, so that the cable fixing structure can be prevented from occupying the space below the box body and causing the bottom of the box body to be uneven, which will not affect the placement and transportation. When in use, the cable holder can be extended below the bottom frame of the box body, and after the cable holder is unfolded, it can extend downward to the inside of the foundation to fix the cable, so that accidents caused by the cable in the foundation being too long and unable to be fixed can be avoided.

[0008] Furthermore, the cable fixing structure includes a supporting structure for supporting the cable bracket, the supporting structure includes a pair of supporting rods, two ends of the cable bracket are correspondingly connected to the two paired supporting rods, and the supporting rods are movably connected to the box.

[0009] Beneficial effects: The support rod has a simple structure and is easy to install. The two ends of the cable bracket are correspondingly connected to two pairs of support rods, which can balance the force on the cable bracket and make the fixed support of the cable more stable and reliable.

[0010] Furthermore, the position of the cable bracket on the support rod is adjustable, so that when the cable bracket is in a position extending below the bottom frame of the box body, the height of the cable bracket relative to the bottom frame of the box body can be adjusted.

[0011] Beneficial effect: The height of the cable bracket relative to the bottom frame of the box can be adjusted according to on-site needs to meet the bending requirements of cables with different bending radii, with better versatility and more convenient use.

[0012] Furthermore, the support rod is rotatably installed on the box body around a horizontal axis, and a long connecting hole extending along its length direction is provided on the support rod. Both ends of the cable bracket are provided with connecting pins passed through the long connecting holes. When the two support rods are rotated to a horizontal state, they overlap horizontally with the cable bracket and are stored in the accommodating space. The height position of the cable bracket is adjusted by swinging the support rod downward to different angles.

[0013] Beneficial effects: the connecting pin can move freely in the connecting long hole to realize stepless adjustment of the height of the cable bracket, with a larger adjustment range, more convenient adjustment and better versatility.

[0014] Furthermore, the connecting pin is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod is swung downward to different angles, the support rod and the cable bracket are locked and fixed by tightening the locking nut.

[0015] Beneficial effects: the connecting pin is a bolt structure, and the bolt structure cooperates with the locking nut to keep the support rod and the cable bracket locked and fixed, with a simple structure, convenient operation and reliable locking.

[0016] Furthermore, the support rod is an angle steel, the connecting long hole is located on one side of the angle steel, and the cable bracket is located on the back side of the angle steel.

[0017] Beneficial effect: The cable gravity is transmitted to the support rod through the cable bracket. The support rod is an angle steel, which can improve the structural strength of the support rod, thereby improving the supporting capacity of the cable fixing structure for the cable, and the support is more stable and reliable.

[0018] Furthermore, the hinge axis between the support rod and the box body is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod is swung downward to different angles, the support rod is kept at a desired angle by tightening the locking nut.

[0019] Beneficial effects: The hinged shaft is a bolt structure, and the bolt structure cooperates with the locking nut to keep the support rod at a desired angle. When the support rod needs to be rotated, only the locking nut needs to be loosened to allow the support rod to rotate. The structure is simple, the operation is convenient, and the locking is reliable.

[0020] Furthermore, the support rod is rotatably connected to the box body through a hinge seat, and the hinge seat is an L-shaped seat, one side of the L-shaped seat is fixedly connected to the box body, and the other side is rotatably assembled with the support rod.

[0021] Beneficial effects: The support rod is rotatably connected to the box body through a hinge seat, which makes it more convenient to connect the support rod to the box body. The hinge seat is an L-shaped seat, one side of the L-shaped seat is fixedly connected to the box body, and the other side is rotatably assembled with the support rod, so that the hinge seat has higher structural strength and stronger load-bearing capacity, thereby improving the supporting capacity of the cable fixing structure to the cable, and the support is more stable and reliable.

[0022] Furthermore, the cable bracket is a rectangular plate, and a plurality of clamp mounting holes are provided on the rectangular plate at intervals along the length direction thereof. Clamps are installed in the clamp mounting holes, and the clamps constitute the locking structure.

[0023] Beneficial effect: The locking structure adopts a clamp, which has a simple structure and is easy to set up. The clamp is installed in the clamp installation hole. The position of the clamp can be adjusted as needed at the construction site, and the clamp can be installed in the clamp installation holes at different positions to adapt to the cable installation, making the cable installation more convenient.

[0024] The prefabricated substation of the present invention adopts the following technical solutions:

[0025] A prefabricated substation includes an electrical box and electrical equipment installed in the electrical box. The electrical box includes a box body. A cable installation plate is provided at the bottom of the box body. The cable installation plate is located above the bottom frame of the box body and a storage space is reserved at its lower side. A cable fixing structure is installed in the storage space. The cable fixing structure includes a cable bracket. The cable bracket is provided with a locking structure for locking the cable on the cable bracket. The cable bracket is movably installed on the box body and can be stored in the storage space and extend below the bottom frame of the box body.

[0026] Beneficial effects: The prefabricated substation of the present invention is improved on the basis of the existing prefabricated substation. The cable installation plate is arranged above the bottom frame of the electrical box and a storage space is reserved on the lower side of the cable installation plate. The cable fixing structure is installed in the storage space so that the cable fixing structure is outside the box, thereby saving the internal space of the box and increasing the distance between the locking structure and the cable connection terminal. Therefore, it can meet the installation requirements of cables with a large bending radius, making cable installation more convenient and making the cable connection terminal less stressed. Since the cable holder is movably installed on the box, the cable holder can be stored in the storage space reserved on the lower side of the cable installation plate when not in use. Therefore, it can avoid that the cable fixing structure occupies the space below the box, causing the bottom of the box to be uneven, and will not affect placement and transportation. When in use, the cable holder can be extended below the bottom frame of the box. After the cable holder is unfolded, it can extend downward to the inside of the foundation to fix the cable. Therefore, it can avoid accidents caused by cables in the foundation being too long and unable to be fixed.

[0027] Furthermore, the cable fixing structure includes a supporting structure for supporting the cable bracket, the supporting structure includes a pair of supporting rods, two ends of the cable bracket are correspondingly connected to the two paired supporting rods, and the supporting rods are movably connected to the box.

[0028] Beneficial effects: The support rod has a simple structure and is easy to install. The two ends of the cable bracket are correspondingly connected to two pairs of support rods, which can balance the force on the cable bracket and make the fixed support of the cable more stable and reliable.

[0029] Furthermore, the position of the cable bracket on the support rod is adjustable, so that when the cable bracket is in a position extending below the bottom frame of the box body, the height of the cable bracket relative to the bottom frame of the box body can be adjusted.

[0030] Beneficial effect: The height of the cable bracket relative to the bottom frame of the box can be adjusted according to on-site needs to meet the bending requirements of cables with different bending radii, with better versatility and more convenient use.

[0031] Furthermore, the support rod is rotatably installed on the box body around a horizontal axis, and a long connecting hole extending along its length direction is provided on the support rod. Both ends of the cable bracket are provided with connecting pins passed through the long connecting holes. When the two support rods are rotated to a horizontal state, they overlap horizontally with the cable bracket and are stored in the accommodating space. The height position of the cable bracket is adjusted by swinging the support rod downward to different angles.

[0032] Beneficial effects: the connecting pin can move freely in the connecting long hole to realize stepless adjustment of the height of the cable bracket, with a larger adjustment range, more convenient adjustment and better versatility.

[0033] Furthermore, the connecting pin is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod is swung downward to different angles, the support rod and the cable bracket are locked and fixed by tightening the locking nut.

[0034] Beneficial effects: the connecting pin is a bolt structure, and the bolt structure cooperates with the locking nut to keep the support rod and the cable bracket locked and fixed, with a simple structure, convenient operation and reliable locking.

[0035] Furthermore, the support rod is an angle steel, the connecting long hole is located on one side of the angle steel, and the cable bracket is located on the back side of the angle steel.

[0036] Beneficial effect: The cable gravity is transmitted to the support rod through the cable bracket. The support rod is an angle steel, which can improve the structural strength of the support rod, thereby improving the supporting capacity of the cable fixing structure for the cable, and the support is more stable and reliable.

[0037] Furthermore, the hinge axis between the support rod and the box body is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod is swung downward to different angles, the support rod is kept at a desired angle by tightening the locking nut.

[0038] Beneficial effects: The hinged shaft is a bolt structure, and the bolt structure cooperates with the locking nut to keep the support rod at a desired angle. When the support rod needs to be rotated, only the locking nut needs to be loosened to allow the support rod to rotate. The structure is simple, the operation is convenient, and the locking is reliable.

[0039] Furthermore, the support rod is rotatably connected to the box body through a hinge seat, and the hinge seat is an L-shaped seat, one side of the L-shaped seat is fixedly connected to the box body, and the other side is rotatably assembled with the support rod.

[0040] Beneficial effects: The support rod is rotatably connected to the box body through a hinge seat, which makes it more convenient to connect the support rod to the box body. The hinge seat is an L-shaped seat, one side of the L-shaped seat is fixedly connected to the box body, and the other side is rotatably assembled with the support rod, so that the hinge seat has higher structural strength and stronger load-bearing capacity, thereby improving the supporting capacity of the cable fixing structure to the cable, and the support is more stable and reliable.

[0041] Furthermore, the cable bracket is a rectangular plate, and a plurality of clamp mounting holes are provided on the rectangular plate at intervals along the length direction thereof. Clamps are installed in the clamp mounting holes, and the clamps constitute the locking structure.

[0042] Beneficial effect: The locking structure adopts a clamp, which has a simple structure and is easy to set up. The clamp is installed in the clamp installation hole. The position of the clamp can be adjusted as needed at the construction site, and the clamp can be installed in the clamp installation holes at different positions to adapt to the cable installation, making the cable installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a structural diagram of an existing prefabricated substation;

[0044] Figure 2 This is a structural schematic diagram of Embodiment 1 of the prefabricated substation of the present invention;

[0045] Figure 3 is a schematic diagram of a cable fixing structure in a retracted state;

[0046] Figure 4 It is a schematic diagram of the unfolding process of the cable fixing structure;

[0047] Figure 5 This is a schematic diagram of the unfolded cable fixing structure;

[0048] Figure 6 It is a structural schematic diagram when the cable fixing structure is extended below the bottom frame of the box;

[0049] In the figure: 1, box body; 101, box body bottom frame; 2, cable chamber; 3, cable installation plate; 301, cable penetration hole; 4, cable connection terminal; 5, cable bracket; 501, clamp mounting hole; 6, clamp; 7, connecting pin; 8, support rod; 801, connecting long hole; 9, hinge shaft; 10, hinge seat. DETAILED DESCRIPTION

[0050] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0051] Embodiment 1 of the prefabricated substation of the present invention:

[0052] like Figure 2 As shown, the prefabricated substation includes an electrical box and electrical equipment installed in the electrical box. The electrical box includes a box body 1, a cable chamber 2 is provided in the box body 1, a cable connection terminal 4 is provided in the cable chamber 2, a cable insertion plate 3 is provided at the bottom of the box body 1, and a cable through hole 301 is provided on the cable insertion plate 3 for the cable to pass through. The cable insertion plate 3 is located above the bottom frame 101 of the box body and a receiving space is reserved on its lower side. A cable fixing structure is installed in the receiving space. The cable fixing structure includes a cable bracket 5 and a supporting structure for supporting the cable bracket 5. The cable bracket 5 is provided with a clamp 6, and the cable can be locked on the cable bracket 5 by the clamp 6. The supporting structure includes a pair of support rods 8, and the two ends of the cable bracket 5 are correspondingly connected to the two pairs of support rods 8. The support rod 8 is rotatably mounted on the box body 1 around a horizontal axis, and a connecting long hole 801 extending along its length direction is provided on the support rod 8. Connecting pins 7 are provided at both ends of the cable bracket 5. The connecting pins 7 are inserted into the connecting long holes 801 on the corresponding sides so that the position of the cable bracket 5 on the support rod 8 is adjustable. When the two support rods 8 are rotated to a horizontal state, they overlap horizontally with the cable bracket 5 and are stored in the accommodation space on the lower side of the cable insertion plate 3. The height position of the cable bracket 5 can be adjusted by swinging the support rod 8 downward to different angles, such as Figure 3-5 When the support rod 8 swings to different angles, the distance L between the two connecting pins 7 at both ends of the cable bracket 5 is different. In this embodiment, the distance L between the two connecting pins 7 is smaller than the distance between the hinge points of the two support rods 8, so that when the cable bracket 5 is unfolded, the two support rods 8 and the cable bracket 5 form an isosceles trapezoidal structure that is wide at the top and narrow at the bottom.

[0053] Of course, in other embodiments, the distance L between the two connecting pins can be less than or equal to the distance between the hinge points of the two support rods, so that when the cable holder is unfolded to the lowest position, the two support rods and the cable holder form a rectangular structure; the distance L between the two connecting pins can be greater than the distance between the hinge points of the two support rods, so that when the cable holder is unfolded, the two support rods and the cable holder form an isosceles trapezoidal structure that is narrow at the top and wide at the bottom; the distance L between the two connecting pins can be greater than or equal to the distance between the hinge points of the two support rods, so that when the cable holder is unfolded, the two support rods and the cable holder form a rectangular structure.

[0054] In this embodiment, the connecting pin 7 is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod 8 swings downward to different angles, the support rod 8 and the cable bracket 5 are locked and fixed by tightening the locking nut.

[0055] The support rod 8 is an angle steel, the connecting long hole 801 is located on one side of the angle steel, the cable bracket 5 is located on the back of the angle steel, and the structural strength of the support rod 8 is sufficient to bear the weight of the cable.

[0056] The support rod 8 is rotatably connected to the box body 1 through the hinge seat 10. Figure 6 As shown, the hinge seat 10 is an L-shaped seat, one side of which is fixedly connected to the box body 1, and the other side is rotatably assembled with the support rod 8. The structural strength of the hinge seat 10 is sufficient to withstand the gravity of the cable support 5, the support rod 8 and the cable. In this embodiment, the two hinge seats 10 are welded to the box body 1, and the tops of the two support rods 8 are rotatably assembled on the corresponding side hinge seats 10 through the hinge shaft 9, and the hinge shaft 9 extends in the horizontal direction so that the two support rods 8 can rotate in the vertical plane. The extension direction of the hinge shaft 9 is perpendicular to the length direction of the cable support 5. The hinge shaft 9 is a bolt structure, and a locking nut is configured on the bolt structure. When the locking nut is loosened, the support rod 8 can rotate. After the support rod 8 is rotated to a suitable position, the locking nut is tightened to keep the support rod 8 at a desired angle, providing stable support for the cable support 5.

[0057] The support rod 8 is rotatably mounted on the box body 1 around a horizontal axis, so that the cable fixing structure can be switched between the retracted state and the deployed state at will. In the retracted state, the two support rods 8 and the cable bracket 5 overlap horizontally and are stored in the accommodating space on the lower side of the cable insertion plate 3, without affecting the transportation and installation of the prefabricated substation. After the prefabricated substation is installed in place, the cable fixing structure can be unfolded, and the locking nuts on the hinge shaft 9 can be loosened so that the two support rods 8 can swing downward. At the same time, the connecting pins 7 at both ends of the cable bracket 5 can move in the connecting long holes 801 of the support rod 8, so as to adjust the height position of the cable bracket 5. The connecting hole is a long hole structure, so that the connecting pins 7 at both ends of the cable bracket 5 can move freely in the connecting long hole 801, so that the height of the cable bracket 5 can be infinitely adjusted within a certain range; after the cable bracket 5 is adjusted to a suitable height, the locking nut on the hinge shaft 9 can be tightened to lock the support rod 8 at the current angle so that the support rod 8 can no longer rotate. At the same time, the locking nut on the connecting pin 7 can be tightened to keep the support rod 8 and the cable bracket 5 locked and fixed. The double locking effect of the locking nut on the hinge shaft 9 and the locking nut on the connecting pin 7 enables the cable bracket 5 to be stably maintained at the current height position. By adjusting the installation position of the cable fixing structure on the box body 1, the cable fixing structure can be unfolded so that the cable bracket 5 is located directly below the cable connection terminal 4 to facilitate cable installation.

[0058] In this embodiment, the cable holder 5 is a horizontally extending rectangular plate, on which a plurality of clamp mounting holes 501 are provided at intervals along its length direction. A clamp 6 is installed in the clamp mounting hole 501 , and the clamp 6 is used to lock the cable on the cable holder 5 .

[0059] Taking the structure in which the cable enters from the bottom of the box 1 as an example, the cable passes through the cable perforation 301 from bottom to top and enters the inside of the box 1. The end of the cable entering the inside of the box 1 is connected to the cable connection terminal 4. The cable fixing structure is located outside the box 1. The cable is clamped and fixed on the cable bracket 5 by the clamp 6 to provide support for the cable to prevent the cable from pulling the cable connection terminal 4 due to gravity. Since the cable fixing structure is located outside the box 1, the internal space of the box is saved, and the distance between the clamp 6 and the cable connection terminal 4 is increased, which can meet the installation requirements of the cable with a larger bending radius, making the cable installation more convenient and the cable connection terminal 4 less stressed. The height of the cable bracket 5 is adjustable, making the cable fixing structure more convenient to use on site and more versatile.

[0060] In addition, during on-site construction, a foundation is provided under the box, and the cable fixing bracket can extend downward into the foundation after being unfolded to fix the cables. Therefore, accidents caused by the failure to set up cable fixing measures in the on-site foundation or the unreasonable location of the cable fixing measures can be avoided.

[0061] Of course, the prefabricated substation of the present invention is not limited to the above-mentioned embodiments.

[0062] For example, in other embodiments, the cable bracket is a U-shaped bracket, and both side arms of the U-shaped bracket are hinged on the box body, and the hinge axis is parallel to the extension direction of the bottom arm of the U-shaped bracket. When the U-shaped bracket is rotated upward to a horizontal state, it can be stored in the accommodating space, and the U-shaped bracket swings downward and extends below the bottom frame of the box body.

[0063] For example, in other embodiments, the position of the cable holder on the support rod is fixed, the support rod is hinged to the box around a horizontal axis, the hinge axis is parallel to the length direction of the cable holder, and the support rod swings downward to extend the cable holder below the bottom frame of the box.

[0064] For example, in other embodiments, the position of the cable bracket on the support rod is fixed, and the support rod is slidably installed on the box along the up and down directions. The support rod can move up and down relative to the bottom frame of the box, thereby adjusting the height of the cable bracket relative to the bottom frame of the box.

[0065] For example, in other embodiments, the support rod is rotatably installed on the box body around a horizontal axis, and a plurality of mounting holes are provided on the support rod at intervals along its length direction. The connecting pins at both ends of the cable bracket are inserted into the mounting holes on the corresponding sides. When the support rod is swung downward to different angles, the connecting pins can be inserted into different mounting holes to adjust the height position of the cable bracket.

[0066] For example, in other embodiments, the connecting pin is an ordinary pin, and an anti-slip portion is provided on the ordinary pin to prevent the pin from slipping out of the connecting long hole of the support rod. At this time, the supporting rod can be locked at the desired angle by a locking structure when the supporting rod is swung downward to different angles, thereby indirectly maintaining the connecting pin in a certain position in the connecting long hole, thereby maintaining the cable bracket at a desired height.

[0067] For example, in other embodiments, the support rod is a U-shaped steel, the connecting long hole is located on the bottom edge of the U-shaped steel, and the cable bracket is located on the back of the U-shaped steel. Alternatively, the support rod is a rectangular plate, and the rectangular plate is provided with a connecting long hole extending along its length direction.

[0068] For example, in other embodiments, the two support rods are rotatably assembled on the corresponding side hinge seats through a hinge shaft, the hinge shaft is a common pin shaft, and a plurality of sets of stop pin through holes are correspondingly arranged on the support rod and the hinge seat. After the support rod is rotated to a suitable position, the support rod is locked at the current angle by inserting the stop pin.

[0069] For example, in other embodiments, the support rod is rotatably connected to the box body through an articulated seat, the articulated seat is a U-shaped seat, one side of the U-shaped seat is fixedly connected to the box body, and the bottom side is rotatably assembled with the support rod. Alternatively, the articulated seat is a rectangular seat, the rectangular seat is welded to the box body, and the support rod is rotatably assembled on the rectangular seat.

[0070] For example, in other embodiments, a plurality of locking structures for locking the cable on the cable holder are provided at intervals along the length direction of the cable holder, the locking structure includes an arc-shaped clamping block and a clamping module for applying a clamping force to the arc-shaped clamping block toward the cable holder, the inner arc surface of the arc-shaped clamping block faces the cable holder, forming a clamping surface that is pressed together with the outer sheath of the cable, and the cable is pressed onto the cable holder through the arc-shaped clamping block.

[0071] The present invention also provides an embodiment of an electrical box, the specific structure of which is the same as the specific structure of the electrical box in each embodiment of the prefabricated substation, and will not be repeated here. In addition, in addition to being applied to prefabricated substations, the electrical box of the present invention can also be applied to factory prefabricated products of various boxes and cabin structures such as switch cabinets, charging cabinets, prefabricated cabins equipped with switch cabinets, SVG boxes, and grounding transformer boxes.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An electrical box, comprising a box body (1), a cable installation plate (3) being provided at the bottom of the box body (1), characterized in that: The cable installation plate (3) is located above the bottom frame (101) of the box body and a storage space is reserved at its lower side. A cable fixing structure is installed in the storage space. The cable fixing structure includes a cable bracket (5). The cable bracket (5) is provided with a locking structure for locking the cable on the cable bracket (5). The cable bracket (5) is movably installed on the box body (1) and can be stored in the storage space and extend below the bottom frame (101) of the box body.

2. The electrical box according to claim 1, characterized in that: The cable fixing structure comprises a supporting structure for supporting the cable bracket (5), the supporting structure comprises a pair of supporting rods (8), the two ends of the cable bracket (5) are correspondingly connected to the two paired supporting rods (8), and the supporting rods (8) are movably connected to the box body (1).

3. The electrical box according to claim 2, characterized in that: The position of the cable support (5) on the support rod (8) is adjustable, so that when the cable support (5) is in a position extending below the box bottom frame (101), the height of the cable support (5) relative to the box bottom frame (101) can be adjusted.

4. The electrical box according to claim 3, characterized in that: The support rod (8) is rotatably mounted on the box body (1) around a horizontal axis. The support rod (8) is provided with a long connecting hole (801) extending along its length direction. Both ends of the cable bracket (5) are provided with connecting pins (7) inserted into the long connecting hole (801). When the two support rods (8) are rotated to a horizontal state, they overlap horizontally with the cable bracket (5) and are accommodated in the accommodation space. The height position of the cable bracket (5) is adjusted by swinging the support rod (8) downward to different angles.

5. The electrical box according to claim 4, characterized in that: The connecting pin shaft (7) is a bolt structure, and a locking nut is arranged on the bolt structure. When the support rod (8) swings downward to different angles, the locking nut is tightened to keep the support rod (8) and the cable bracket (5) locked and fixed.

6. The electrical box according to claim 5, characterized in that: The support rod (8) is an angle steel, the connecting long hole (801) is located on one side of the angle steel, and the cable bracket (5) is located on the back side of the angle steel.

7. The electrical box according to claim 4, characterized in that: The hinge shaft (9) between the support rod (8) and the box body (1) is a bolt structure, on which a locking nut is arranged. When the support rod (8) swings downward to different angles, the locking nut is tightened to keep the support rod (8) at a desired angle.

8. The electrical box according to claim 4, characterized in that: The support rod (8) is rotatably connected to the box body (1) via a hinge seat (10); the hinge seat (10) is an L-shaped seat, one side of the L-shaped seat is fixedly connected to the box body (1), and the other side is rotatably assembled with the support rod (8).

9. The electrical box according to any one of claims 1 to 8, characterized in that: The cable support (5) is a rectangular plate, on which a plurality of clamp mounting holes (501) are arranged at intervals along the length direction thereof, and a clamp (6) is installed in the clamp mounting hole (501), and the clamp (6) constitutes the locking structure.

10. A prefabricated substation, comprising an electrical box and electrical equipment installed in the electrical box, characterized in that: The electrical box is the electrical box according to any one of claims 1 to 9.

Images