Power box

Abstract

A power box comprises a box body, a box body connector is arranged on the side portion of the box body, an operation opening is formed in the front face of the box body, a socket, a leakage protector and a knife switch are arranged in the box body side by side, and the socket, the leakage protector and the knife switch correspond to the operation opening. The upper portion of the protective cover is hinged to the box body, a first torsional spring is installed on a hinged shaft, and the box body and the protective cover play a dustproof or rainproof role on the socket, the leakage protector and the knife switch; a handle is installed on the top of the box body. The lower end of the handle is hinged to the box body. And an external wiring connector is inserted into the box body connector. The device is compact in structure, small in size, convenient to carry and safe to operate. The upper part of the power box is provided with the protective cover which can prevent dust and rain, so that the problem that an existing power box cannot be normally used due to dust or water entering can be avoided, and the working efficiency and quality of maintenance or operation are improved.

Description

Technical Field

[0001] The utility model relates to a power connection device used in the process of overhaul or operation and maintenance of a transformer substation, in particular to a power supply box. Background Art

[0002] During the inspection or maintenance of the substation, electric tools such as electric drills and angle grinders, or high-voltage test equipment such as dielectric loss testers and switch characteristic testers are often used. Therefore, it is necessary to connect the fixed power supply box in the substation to power the above tools or instruments. According to the requirements of the power safety regulations, the power connection device needs to be "one machine, one switch, and one protection". Therefore, during maintenance, the staff must use a power box equipped with a socket, leakage protector and knife switch. However, the existing power boxes are not dustproof or rainproof. During the storage or transportation of the power boxes, dust or water often enters, making them unable to be used normally, which not only affects the efficiency of inspection or maintenance, but also poses a safety hazard that cannot be ignored. Utility Model Content

[0003] The purpose of the utility model is to provide a power supply box, which can solve the problems existing in the prior art, is easy to use, safe and reliable. In addition, it can also have the advantages of compact structure, small size, light weight and easy to carry, which can effectively improve work efficiency and reduce the labor intensity of staff.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A power supply box comprises a box body, a box body joint is provided at the side of the box body, an operation port is provided at the front of the box body, a socket, a leakage protector and a knife switch are arranged side by side in the box body, and the socket, leakage protector and knife switch correspond to the operation port, and the characteristics are: a flippable protective cover is provided on the operation port, the upper part of the protective cover is hinged to the box body, a first torsion spring is installed on the hinge shaft, the box body (1) and the protective cover (2) play a role of dust or rainproof for the socket (11), the leakage protector (12) and the knife switch (13); a handle is installed on the top of the box body, and the lower end of the handle is hinged to the box body; an external wiring connector is plugged into the box body joint;

[0006] A baffle is provided at the lower part of the protective cover, and when the protective cover is closed, it forms a closed space with the box body. An annular sealing groove is provided on the outer periphery of the operation port, and an annular sealing ring is installed in the annular sealing groove. An annular sealing convex edge corresponding to the annular sealing groove is provided on the inner side of the protective cover. When the protective cover is closed, the annular sealing groove cooperates with the annular sealing convex edge, and the annular sealing convex edge squeezes the annular sealing ring to improve the sealing performance. A locking mechanism is provided between the protective cover and the box body.

[0007] The locking mechanism includes two shield screw holes arranged on the shield and two box screw holes arranged on the box. The shield screw holes and the box screw holes are matched one by one and are tightened by bolts to lock the shield and the box.

[0008] A locking ring is arranged on the outer periphery of the external wiring connector, the locking ring can rotate relative to the external wiring connector, an internal thread is arranged on the inner side of the locking ring, an external thread is arranged on the outer periphery of the box connector, and the locking ring is threadedly connected to the box connector; when in use, the external wiring connector and the box connector are first plugged in, and then the locking ring is rotated to make it cooperate with the box connector thread to prevent the external wiring connector from falling off.

[0009] The locking mechanism comprises a shell and a locking plate. The shell is located below the operation port and outside the annular sealing groove. The shell is connected to the box body. A locking hole is provided in the middle of the shell body. One end of the locking plate is connected to the baffle. When the protective cover is closed with the box body, the other end of the locking plate can be located in the locking hole. A first strip hole is provided on the locking plate. A side plate is installed on each side of the shell body. The side plate and the shell body form an inner cavity. A second strip hole is provided on the side wall of the locking hole. The second strip hole is communicated with the inner cavity. A limiting unit and a locking rod device are installed in the inner cavity. The limiting unit and the locking rod device cooperate to achieve locking or unlocking.

[0010] The locking rod device comprises a rotating seat, and a half-shaft is respectively arranged on both axial sides of the rotating seat, and the two half-shafts are respectively connected to the two side plates, and the half-shafts can rotate relative to the shell, and locking torsion springs are installed on the half-shafts; the rotating seat is radially installed with a locking rod and a positioning bolt, one end of the locking rod can be matched with the limiting unit, and the other end of the locking rod is inserted into the locking hole through the second strip hole; the angle between the locking rod and the positioning bolt is ninety degrees, and the positioning bolt is threadedly connected to the rotating seat, and the inner end of the positioning bolt contacts the locking rod to lock the locking rod and the rotating seat;

[0011] The limiting unit includes a guide column, the outer end of the guide column passes through the shell and is connected to the limiting plate, the limiting plate is located at the front of the box body, the inner end of the guide column is installed with a disc-shaped limiting disk, and the outer circumference of the guide column is installed with two disc springs; the two disc springs are matched and are both located between the limiting disk and the shell to provide a reset elastic force for the limiting disk; when the rotating seat rotates clockwise, it can drive the locking rod to contact the end face of the limiting disk and compress the disc spring; when the rotating seat rotates counterclockwise, the side of the limiting disk can cooperate with the positioning bolt to prevent the rotating seat from driving the locking rod to rotate further counterclockwise.

[0012] A ball head is arranged at one end of the locking rod which can cooperate with the limiting disc.

[0013] Compared with the prior art, the utility model has the following advantages: it has a compact structure, a small size, is easy to carry, and is safe to operate. A protective cover is arranged on the upper part to prevent dust and rain, thereby avoiding the problem that the existing power supply box cannot be used normally due to dust or water ingress, and improving the work efficiency and quality of maintenance or operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the power supply box of the utility model, and the figure shows the first solution of the locking mechanism;

[0015] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure;

[0016] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure from another angle;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the power box of the utility model after the protective cover is opened;

[0018] Figure 5 yes Figure 4 Schematic diagram of the three-dimensional structure from another angle;

[0019] Figure 6 yes Figure 1 The enlarged structural diagram of the A direction of FIG. 1 is a second scheme of the locking mechanism; in order to highlight the structure of the locking mechanism, only the baffle and the locking mechanism are shown in the figure; the protective cover and the box body in the figure are in a closed state, at this time, under the action of the locking torsion spring, the lower end of the locking rod (570) is deflected toward the rear of the housing (50) to tighten the locking plate (54);

[0020] Figure 7 yes Figure 6 The schematic diagram of the structure of the locking mechanism in the second state is shown; in the figure, the protective cover is opened at a very small angle relative to the box body. At this time, the locking plate (54) tends to pull the locking rod (570) to move to one side of (21), but because the positioning bolt (572) is blocked by the limiting disc (510), the locking rod (570) cannot continue to rotate;

[0021] Figure 8 yes Figure 6 The schematic diagram of the structure of the locking mechanism in the third state is shown; at this time, the limiting unit (51) has moved to one side of (21), the positioning bolt (572) is not constrained by the limiting disc (510), and at the same time, the locking plate (54) loses the constraint of the locking rod (570) and is moving out of the locking hole (53);

[0022] Fig. 9 is a schematic diagram of the three-dimensional structure of (10);

[0023] Fig.10 It is a schematic diagram of the three-dimensional structure of the locking rod device (57).

[0024] Reference numerals:

[0025] 1 box 10 box connector 11 socket 12 leakage protector 13 knife switch 14 annular sealing groove 15 sealing ring 16 operation port 17 box screw hole

[0026] 2 protective cover 20 protective cover screw hole 21 baffle 22 annular sealing convex edge 23 locking bolt

[0027] 3 handles

[0028] 4 External wiring connector 40 locking ring

[0029] 5 locking mechanism 50 housing 500 inner cavity 501 opening 51 limiting unit 510 limiting disc 511 disc spring 512 guide column 513 limiting plate 52 side plate 53 locking hole 54 locking plate 55 first strip hole 56 second strip hole 57 locking rod device 570 locking rod 571 rotating seat 572 positioning bolt 573 half shaft 574 ball head DETAILED DESCRIPTION

[0030] The purpose of the utility model is to provide a power supply box. The utility model will be further described below in conjunction with specific embodiments.

[0031] A power box, such as Figure 1 As shown, it includes a box body 1, on which a box body joint 10 and an operation port 16 are arranged. A socket 11, a leakage protector 12 and a knife switch 13 are arranged side by side in the box body 1. The socket 11, the leakage protector 12 and the knife switch 13 are matched and placed in the operation port 16 for easy operation. The wire connection methods between the socket 11, the leakage protector 12 and the knife switch 13, and between the socket 11, the leakage protector 12 and the knife switch 13, and between the socket 11 and the box body joint 10 are all prior art. Figure 4 and Figure 5 As shown, a flippable protective cover 2 is provided on the operation port 16. Figure 2 and Figure 3 As shown, a handle 3 is installed on the box body for easy carrying. The box body joint 10 is connected to the external wiring joint 4. In order to prevent the external wiring joint 4 from falling off, a locking ring 40 is provided on the external wiring joint 4. An internal thread is provided inside the locking ring 40. The internal thread cooperates with the external thread of the box body joint 10. When in use, the external wiring joint 4 and the box body joint 10 are plugged in, and then the internal thread on the locking ring 40 cooperates with the external thread of the box body joint 10 and is tightened to prevent the external wiring joint 4 from falling off.

[0032] like Figure 4 and Figure 5As shown, a baffle 21 and a torsion spring are provided on the protective cover 2. The torsion spring can automatically close the protective cover 2, which can prevent the socket 11, the leakage protector 12 and the knife switch 13 from dust or rain. An annular sealing groove 14 is provided on the inner side of the operation port 16, and a sealing ring 15 is installed in the annular sealing groove 14. An annular sealing ridge 22 corresponding to the annular sealing groove 14 is provided on the inner side of the protective cover 2. After the protective cover 2 is closed, the annular sealing groove 14 cooperates with the annular sealing ridge 22, and the annular sealing ridge 22 squeezes the sealing ring 15 to improve the sealing performance, thereby further sealing the protective cover 2 and the box body 1. On the one hand, it prevents the socket 11, the leakage protector 12 or the knife switch 13 from being hit by external force during carrying; on the other hand, it can also prevent dust and rain. A locking mechanism 5 is provided on the protective cover 2.

[0033] like Figure 1 , Figure 2 and Figure 4 , Figure 5 As shown, the first locking mechanism 5 includes two shield screw holes 20 provided on the shield 2 , each shield screw hole 20 cooperates with a box screw hole 17 provided on the box 1 , and then cooperates with a locking bolt 23 to be tightened to lock the shield 2 .

[0034] In order to facilitate the staff to use the power box and to facilitate locking or unlocking the protective cover 2, a second locking mechanism 5 is designed. Figure 6 As shown, the locking mechanism includes a shell 50 and a locking plate 54. The shell 50 is located below the operating port 16 and outside the annular sealing groove 14. An installation port is provided on the housing 1, and the shell 50 is located in the installation port and connected to the housing 1. A locking hole 53 is provided in the middle of the housing 50. One end of the locking plate 54 can be located in the locking hole 53, and the other end of the locking plate 54 is connected to the baffle 21. A first strip hole 55 is provided on the locking plate 54, and the first strip hole 55 corresponds to the second strip hole 56. A side plate 52 is installed on each side of the housing 50, and the side plate 52 and the housing 50 form an inner cavity 500. A second strip hole 56 is provided on the side wall of the locking hole 53, and the second strip hole 56 is communicated with the inner cavity 500. A limiting unit 51 and a locking rod device 57 are installed in the inner cavity 500. The limiting unit 51 and the locking rod device 57 cooperate to achieve unlocking or locking of the locking plate 54.

[0035] like Figure 6 and Fig.10As shown, the locking rod device 57 has a rotating seat 571, and a half shaft 573 is provided on both sides of the rotating seat 571 in the axial direction. The two half shafts 573 are respectively connected to the two side plates 52. The half shaft 573 can rotate relative to the housing 50. A locking torsion spring is installed on the half shaft 573, and the locking torsion spring provides power for the half shaft 573 to drive the locking rod 570 to rotate clockwise. The locking rod 570 and the positioning bolt 572 are radially installed on the rotating seat 571. One end of the locking rod 570 corresponds to the limiting unit 51, and the other end of the locking rod 570 penetrates into the locking hole 53 through the second strip hole 56. In the locked state, the other end of the locking rod 570 is simultaneously located in the first strip hole 55 to lock the locking plate 54. The included angle between the locking rod 570 and the positioning bolt 572 is ninety degrees. The positioning bolt 572 is threadedly connected to the rotating seat 571 . The inner end of the positioning bolt 572 contacts the locking rod 570 to lock the locking rod 570 and the rotating seat 571 .

[0036] like Figure 6 As shown, the limiting unit 51 has a guide column 512. The outer end of the guide column 512 passes through the housing 50 and is connected to the limiting plate 513, and the limiting plate 513 is located on the front of the box body 1. The inner end of the guide column 512 is installed with a disc-shaped limiting disk 510. Two disc springs 511 are installed on the outer periphery of the guide column 512. The two disc springs 511 are matched and are both located between the limiting disk 510 and the housing 50 to provide a restoring elastic force for the limiting disk 510.

[0037] The technical effect of the limiting unit 51 is that it can limit the locking rod 570 from rotating clockwise or counterclockwise:

[0038] Limiting the clockwise rotation of the locking rod 570: the locking torsion spring always provides elastic force for the rotating seat 571 to rotate clockwise. However, when the locking plate 54 is separated from the locking hole 53, the end face of the limiting disk 510 cooperates with the upper end of the locking rod 570, so that the lower end of the locking rod 570 is always located in the locking hole 53, that is, the limiting disk 510 limits the locking rod 570 under the action of the disc spring 511, thereby limiting the initial position of the locking rod 570 and preventing clockwise rotation.

[0039] Limiting the locking rod 570 from rotating counterclockwise: When the rotating seat 571 rotates counterclockwise, the positioning bolt 572 will cooperate with the side surface of the limiting disk 510, and the limiting disk 510 can prevent the rotating seat 571 from driving the locking rod 570 to rotate counterclockwise.

[0040] The action process of the power box provided with the second locking mechanism when opening or closing the protective cover 2 is as follows:

[0041] like Figure 6 As shown, when the protective cover and the box body are in a closed state, the locking rod 570 tends to rotate clockwise under the action of the locking torsion spring, and its lower end deflects toward the rear of the housing 50 to tighten the locking plate 54.

[0042] When in use, first connect the external wiring connector 4 to the power supply of the substation, then insert the external wiring connector 4 into the external power supply, and then open the protective cover 2, and connect the electrical equipment or instruments such as electric drills, angle grinders, dielectric loss testers, switch characteristic testers, etc. to the socket 11 for electricity. When there is a risk of leakage, the leakage protector starts working and automatically disconnects the power supply to ensure safety. When not in use, the external wiring connector is disconnected from the external power supply, the electrical equipment is unplugged from the socket 11, the protective cover 2 automatically flips and closes, and then the locking mechanism is used to fix the protective cover 2 on the box body 1 to play a dustproof or waterproof role. In particular, the annular sealing groove 14 cooperates with the annular sealing ridge 22 to seal, which can also greatly improve the sealing effect of the protective cover 2.

[0043] The power supply box of the utility model has the advantages of small size, light weight, convenient carrying, safe and convenient use.

[0044] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A power supply box, comprising a box body (1), a box body joint (10) is provided on the side of the box body (1), an operation port (16) is provided on the front of the box body (1), a socket (11), a leakage protector (12) and a knife switch (13) are arranged side by side in the box body (1), the socket (11), the leakage protector (12) and the knife switch (13) correspond to the operation port (16), and the characteristics are: A reversible protective cover (2) is provided on the operation port (16); the upper portion of the protective cover (2) is hinged to the box body (1); a first torsion spring is installed on the hinge shaft; the box body (1) and the protective cover (2) play a role in preventing dust or rain for the socket (11), the leakage protector (12) and the knife switch (13); a handle (3) is installed on the top of the box body (1); the lower end of the handle (3) is hinged to the box body (1); the external wiring connector (4) is plugged into the box body connector (10); A baffle (21) is provided at the lower part of the protective cover (2). When the protective cover (2) is closed, it forms a closed space with the box body (1). An annular sealing groove (14) is provided on the outer periphery of the operation port (16). A sealing ring (15) is installed in the annular sealing groove (14). An annular sealing convex edge (22) corresponding to the annular sealing groove (14) is provided on the inner side of the protective cover (2). When the protective cover (2) is closed, the annular sealing groove (14) cooperates with the annular sealing convex edge (22), and the annular sealing convex edge (22) squeezes the sealing ring (15) to improve the sealing performance. A locking mechanism is provided between the protective cover (2) and the box body (1).

2. A power supply box according to claim 1, characterized in that: The locking mechanism comprises two shield screw holes (20) provided on the shield (2) and two box screw holes (17) provided on the box (1); the shield screw holes (20) and the box screw holes (17) are matched one by one and are tightened by bolts (23) so as to lock the shield (2) and the box (1).

3. A power supply box according to claim 1, characterized in that: A locking ring (40) is arranged on the outer periphery of the external wiring connector (4), the locking ring (40) can rotate relative to the external wiring connector (4), an internal thread is arranged on the inner side of the locking ring (40), an external thread is arranged on the outer periphery of the box connector (10), and the locking ring (40) is threadedly connected to the box connector (10); when in use, the external wiring connector (4) and the box connector (10) are first plugged in, and then the locking ring (40) is rotated to make it threadably matched with the box connector (10), so as to prevent the external wiring connector (4) from falling off.

4. A power supply box according to claim 1, characterized in that: The locking mechanism comprises a housing (50) and a locking plate (54). The housing (50) is located below the operating port (16) and outside the annular sealing groove (14). The housing (50) is connected to the housing (1). A locking hole (53) is provided in the middle of the housing (50). One end of the locking plate (54) is connected to the baffle (21). When the protective cover (2) is closed with the housing (1), the other end of the locking plate (54) can be located in the locking hole (53). The locking plate (54) is provided with a locking hole (53). A first strip hole (55) is provided; a side plate (52) is installed on each side of the shell (50), and the side plate (52) and the shell (50) form an inner cavity (500); a second strip hole (56) is provided on the side wall of the lock hole (53), and the second strip hole (56) is communicated with the inner cavity (500); a limit unit (51) and a locking rod device (57) are installed in the inner cavity (500), and the limit unit (51) and the locking rod device (57) cooperate to achieve locking or unlocking; The locking rod device (57) comprises a rotating seat (571), and a half-shaft (573) is respectively arranged on both axial sides of the rotating seat (571), and the two half-shafts (573) are respectively connected to the two side plates (52), and the half-shafts (573) can rotate relative to the shell (50), and a locking torsion spring is installed on the half-shaft (573); the rotating seat (571) is radially installed with a locking rod (570) and a positioning bolt (572), and one end of the locking rod (570) can be matched with the limiting unit (51), and the other end of the locking rod (570) is inserted into the locking hole (53) through the second strip hole (56); the angle between the locking rod (570) and the positioning bolt (572) is ninety degrees, and the positioning bolt (572) is threadedly connected to the rotating seat (571), and the inner end of the positioning bolt (572) contacts with the locking rod (570) to lock the locking rod (570) and the rotating seat (571); The limiting unit (51) comprises a guide column (512), the outer end of the guide column (512) passes through the housing (50) and is connected to a limiting plate (513), the limiting plate (513) is located on the front of the box body (1), a disc-shaped limiting disk (510) is installed on the inner end of the guide column (512), and two disc springs (511) are installed on the outer periphery of the guide column (512); the two disc springs (511) are matched and are both located between the limiting disk (510) and The housing (50) provides a restoring elastic force for the limiting disc (510); when the rotating seat (571) rotates clockwise, it can drive the locking rod (570) to contact the end surface of the limiting disc (510) and compress the disc spring (511); when the rotating seat (571) rotates counterclockwise, the side surface of the limiting disc (510) can cooperate with the positioning bolt (572) to prevent the rotating seat (571) from driving the locking rod (570) to rotate further counterclockwise.

5. A power supply box according to claim 4, characterized in that: A ball head (574) is provided at one end of the locking rod (570) that can cooperate with the limiting disc (510).

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