High-sealing anti-falling prefabricated junction box

Abstract

The invention discloses a high-sealing anti-falling prefabricated junction box, and relates to the technical field of junction boxes, the high-sealing anti-falling prefabricated junction box comprises a box body and a box cover, and further comprises a wire hole sealing mechanism and a reinforcing mechanism, the wire hole sealing mechanism comprises a sealed annular air bag, a contraction groove and a pressed air-entrapping part, and the outer wall of the box body is provided with a wire cleaning part corresponding to a threading hole; according to the invention, through the arrangement of the wire hole sealing mechanism, a cable is inserted into the inner side of the box body through a threading hole, so that after the end part of the cable is fixedly connected with the connector bar, a pressed air-entrapping part in the wire hole sealing mechanism can be extruded by a box cover and continuously injects air into the inner side of a sealed annular air bag in the process of manually covering the box cover on the open end of the box body; therefore, the inner wall of the closed annular air bag can be tightly attached to the outer wall of the cable, the gap is reduced, the sealing performance in the box body is enhanced, and water vapor in the external environment of the box body is prevented from entering the inner side of the box body through the gap.

Description

Technical Field

[0001] The invention relates to the technical field of junction boxes, and in particular to a highly sealed and anti-detachment prefabricated junction box. Background Art

[0002] The junction box is an important part of the electrical wiring system of homes and buildings, and is also one of the electrical accessories in home decoration. The box body of the existing electrical junction box is mostly prefabricated, so that when the junction box is on site, it can be used by simply adding a box cover to the box body, avoiding the cumbersome on-site assembly of conventional junction boxes;

[0003] Ordinary prefabricated junction boxes have poor sealing performance. When the junction box is in a humid environment, water vapor in the environment outside the box can easily enter the junction box through the gap between the cable and the wire hole, which can easily cause a short circuit and damage the junction box. At the same time, the cable is only connected to the terminal block in the junction box through a simple threaded connector, which actually has a general effect on fixing the cable. Once the cable is pulled by external force, it is easy to detach from the terminal block, causing a power outage. Summary of the invention

[0004] In order to solve the above technical problems, a highly sealed and anti-detachment prefabricated junction box is provided, which solves the problems of poor sealing inside the junction box and weak fixing effect of cables in the junction box in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a highly sealed and anti-dropping prefabricated junction box, comprising a box body with an open top and a box cover arranged above the open box body, a wiring row is arranged in the inner side of the box body, and wire holes are opened on both side walls of the box body, and also includes a wire hole sealing mechanism for enhancing the sealing of the inside of the box body and a reinforcement mechanism for enhancing the firmness of the cable inside the box body;

[0006] The wire hole closing mechanism includes a closed annular air bag fixed in an annular shape inside the threading hole, a contraction groove opened on the open end of the box body, and a pressurized gas-filled component arranged in the contraction groove, and a wire cleaning component corresponding to the threading hole is arranged on the outer wall of the box body;

[0007] The reinforcement mechanism includes a movable corner piece and a fixed corner piece which are symmetrically arranged in a corner shape between the closed annular airbag and the wiring bank. The fixed corner piece is located below the movable corner piece, and a plurality of movable strips are fixed at equal distances at both ends of the movable corner piece. A plurality of fixed strips are fixed at equal distances at both ends of the fixed corner piece. The fixed strips are staggered with the movable corner piece. A fixed column is fixedly connected between the fixed corner piece and the inner wall of the bottom end of the box body. A pressure component cooperating with the pressure slide is arranged above the movable corner piece.

[0008] Preferably, the pressurized gas-filled component includes a pressurized slide seat slidably arranged in the open end of the shrinkage groove, a pressurized airbag is fixed between the pressurized slide seat and the inner wall of the bottom end of the shrinkage groove, and an air injection pipe is also arranged in the inner wall of the box body, one end of the air injection pipe penetrates into the inner side of the pressurized airbag, and the other end of the air injection pipe penetrates into the inner side of the closed annular airbag.

[0009] Preferably, the wire cleaning component comprises a mounting tube detachably arranged on the outer wall of the box body and a sponge ring fixed inside the mounting tube.

[0010] Preferably, the pressure-applying component includes a connecting strip vertically fixed to the top of the movable corner piece, a sliding slot connected to the shrinkage groove is opened on the inner side wall of the box body, a connecting strip is slidably arranged in the sliding slot, and both ends of the connecting strip are respectively fixedly connected to the pressure sliding seat and the push-pull column.

[0011] Preferably, springs are provided on both sides of the pressurized airbag, and both ends of the springs are fixedly connected to the pressurized slide seat and the inner wall of the bottom end of the shrinkage groove respectively.

[0012] Preferably, an externally threaded locking ring is fixed to one end of the installation tube facing the box body, and an internally threaded locking groove matched with the externally threaded locking ring is formed on the outer wall of the box body.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) By setting the wire hole sealing mechanism, after the cable is passed through the wire hole to the inner side of the box body so that the cable end is fixedly connected to the terminal block, the pressurized gas-filled component in the wire hole sealing mechanism can be squeezed by the box cover and continuously inject gas into the inner side of the closed annular airbag during the process of manually installing the box cover on the open end of the box body, so that the closed annular airbag expands and the inner diameter shrinks, so that the inner wall of the closed annular airbag can be closely fitted with the outer wall of the cable, thereby reducing the gap, enhancing the sealing of the box body, and preventing water vapor in the external environment of the box body from entering the inner side of the box body through the gap.

[0015] (2) By setting the wire cleaning component, when the cable is inserted into the threading hole, the cable can be inserted into the inner side of the sponge ring in advance, so that the sponge ring can continuously scrape and clean the outer wall of the cable during the process of cable insertion and contraction, thereby achieving the effect of self-cleaning of the outer wall of the cable and preventing impurities from affecting the expansion effect of the closed annular airbag.

[0016] (3) Through the setting of the reinforcement mechanism, when the cable is passed through the threading hole into the inner side of the box body, the cable can be simultaneously passed between the fixed angle piece and the movable angle piece, and then a box cover is set on the open end cover of the box body, and the pressure slide seat is compressed and contracted inside the contraction groove, and the movable angle piece is simultaneously moved downward by the pressure component, and the movable bar and the fixed bar slide in an interlaced manner, and then the movable angle piece cooperates with the fixed angle piece to effectively clamp the cable, thereby achieving a reinforcement effect on the cable and preventing the cable from being separated from the terminal block under external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0020] Figure 4 It is a schematic diagram of the structure in which the mounting tube and the box body are separated according to the present invention.

[0021] The numbers in the figure are:

[0022] 1. Box body; 2. Box cover; 3. Terminal block; 4. Closed annular airbag; 5. Shrinkage groove; 6. Pressurized airbag; 7. Air injection pipe; 8. Pressurized slide seat; 9. Mounting tube; 10. Sponge ring; 11. External thread locking ring; 12. Internal thread locking groove; 13. Fixed angle piece; 14. Fixed strip; 15. Movable angle piece; 16. Movable strip; 17. Fixed column; 18. Push-pull column; 19. Connecting strip. DETAILED DESCRIPTION

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0024] Reference Figure 1-4 As shown, a highly sealed and anti-dropping prefabricated junction box comprises a box body 1 with an open top and a box cover 2 arranged above the open end of the box body 1, the box cover 2 is detachable from the open end of the box body 1 by screws, a wiring row 3 is arranged in the inner side of the box body 1, both side walls of the box body 1 are provided with threading holes, and a wire hole sealing mechanism for enhancing the sealing of the inside of the box body 1 is also included;

[0025] The thread hole sealing mechanism comprises a closed annular air bag 4 fixed in an annular shape inside the thread hole, a shrinkage groove 5 provided on the open end of the box body 1, and a pressurized gas-filled component arranged in the shrinkage groove 5;

[0026] By setting the wire hole closing mechanism, after the cable is passed through the wire threading hole to the inner side of the box body 1 so that the cable end is fixedly connected to the terminal block 3, the pressurized gas-filled component in the wire hole closing mechanism can be squeezed by the box cover 2 and continuously inject gas into the inner side of the closed annular airbag 4 during the process of manually setting the box cover 2 on the open end of the box body 1, so that the closed annular airbag 4 is expanded by the gas and the inner diameter is reduced, so that the inner wall of the closed annular airbag 4 can be closely fitted with the outer wall of the cable, thereby reducing the gap, enhancing the sealing of the inside of the box body 1, and preventing water vapor in the external environment of the box body 1 from entering the inner side of the box body 1 through the gap.

[0027] Further, refer to Figure 2 and Figure 3 As shown, it is worth noting that the pressurized gas-filled component includes a pressurized slide seat 8 slidably arranged in the open end of the contraction groove 5, a pressurized airbag 6 is fixed between the pressurized slide seat 8 and the inner wall of the bottom end of the contraction groove 5, and an air injection pipe 7 is also arranged in the inner side wall of the box body 1, one end of the air injection pipe 7 penetrates into the inner side of the pressurized airbag 6, and the other end of the air injection pipe 7 penetrates into the inner side of the closed annular airbag 4;

[0028] Springs are provided on both sides of the pressurized airbag 6, and the two ends of the springs are fixedly connected to the pressurized slide seat 8 and the inner wall of the bottom end of the shrinkage groove 5 respectively;

[0029] When the box cover 2 is to be installed on the open end of the box body 1, the pressurized slide seat 8 in the pressurized gas-filled component is pre-pressed by the box cover 2 to shrink toward the inside of the shrink groove 5 and compress the pressurized airbag 6 to deform, so that the gas inside the pressurized airbag 6 can be squeezed by the gas injection pipe 7 to squeeze the inner cavity of the closed annular airbag 4, thereby increasing the gas pressure inside the closed annular airbag 4, so that the closed annular airbag 4 is inflated;

[0030] And during the process of the pressure slide 8 shrinking the inner side of the shrinkage groove 5, the pressure slide 8 can still continue to compress the spring deformation, and utilize the elastic force of the spring. After the box cover 2 is manually removed from the open end of the box body 1, the extrusion force on the pressure slide 8 is reduced, and the pressure slide 8 can be quickly reset under the elastic force of the spring and pull the pressurized airbag 6 back to restore its shape, so that the gas inside the closed annular airbag 4 is sucked into the inner cavity of the pressurized airbag 6 by the air injection pipe 7, thereby shrinking the closed annular airbag 4, making it convenient for manual removal and replacement of cables.

[0031] In the above embodiment, although the inner wall of the closed annular airbag 4 is closely fitted with the outer wall of the cable to reduce the gap and enhance the sealing of the box body 1, the cable will inevitably be covered with mud and sand on its outer wall when it is used at the construction site. Once the cable is not cleaned and directly inserted into the threading hole, the impurities on its outer wall will easily damage the closed annular airbag 4 when it expands, affecting the fitting effect between the closed annular airbag 4 and the outer wall of the cable.

[0032] Further, refer to Figure 3 and Figure 4As shown, it is worth noting that a wire cleaning component corresponding to the threading hole is provided on the outer wall of the box body 1;

[0033] The wire cleaning component includes a mounting tube 9 detachably arranged on the outer wall of the box body 1 and a sponge ring 10 fixed inside the mounting tube 9;

[0034] By setting the wire cleaning component, when the cable is passed through the threading hole, the cable can be passed through the inner side of the sponge ring 10 in advance, so that the sponge ring 10 can continuously scrape and clean the outer wall of the cable during the process of cable threading, thereby achieving the self-cleaning effect of the outer wall of the cable and avoiding impurities from affecting the expansion effect of the closed annular airbag 4.

[0035] Further, refer to Figure 3 and Figure 4 As shown, it is worth noting that an external thread locking ring 11 is fixed to one end of the installation tube 9 facing the box body 1, and an internal thread locking groove 12 adapted to the external thread locking ring 11 is opened on the outer wall of the box body 1;

[0036] Through the arrangement of the external thread locking ring 11 and the internal thread locking groove 12, after a certain period of use, manual operation only requires a simple knob installation tube 9 to allow the external thread locking ring 11 to be withdrawn from the inner side of the internal thread locking groove 12 under the threaded structure, thereby facilitating the removal and replacement of the installation tube 9 and the sponge ring 10 as a whole.

[0037] Further, refer to Figure 2 and Figure 3 As shown, it is worth noting that it also includes a reinforcement mechanism for enhancing the firmness of the cable inside the box body 1;

[0038] The reinforcement mechanism includes a movable corner piece 15 and a fixed corner piece 13 which are symmetrically arranged between the closed annular airbag 4 and the wiring row 3 in a corner shape. The fixed corner piece 13 is located below the movable corner piece 15, and a plurality of movable bars 16 are fixed at equal distances at both ends of the movable corner piece 15. A plurality of fixed bars 14 are fixed at equal distances at both ends of the fixed corner piece 13. The fixed bars 14 and the movable corner piece 15 are staggered. A fixed column 17 is fixedly connected between the fixed corner piece 13 and the inner wall of the bottom end of the box body 1. A pressure component cooperating with the pressure slide 8 is arranged above the movable corner piece 15.

[0039] By setting the reinforcement mechanism, when the cable is passed through the threading hole into the inner side of the box body 1, the cable can be simultaneously passed through between the fixed angle piece 13 and the movable angle piece 15, and then the box cover 2 is set on the open end cover of the box body 1, and the pressure slide 8 is compressed and contracted inside the contraction groove 5, and the movable angle piece 15 is moved downward synchronously by the pressure component, and the movable bar 16 and the fixed bar 14 slide alternately, and then the movable angle piece 15 cooperates with the fixed angle piece 13 to effectively clamp the cable, thereby achieving the reinforcement effect of the cable and preventing the cable from being separated from the terminal block 3 under external force.

[0040] Further, refer to Figure 3 As shown, it is worth noting that the pressure-applying component includes a connecting strip 19 vertically fixed to the top of the movable corner piece 15, and a sliding slot connected to the shrinkage groove 5 is opened on the inner side wall of the box body 1. The connecting strip 19 is slidably arranged in the sliding slot, and the two ends of the connecting strip 19 are fixedly connected to the pressure slide seat 8 and the push-pull column 18 respectively;

[0041] By setting the pressure-applying component, when the pressure slide 8 is compressed and shrinks the inner side of the shrinkage groove 5, the pressure slide 8 can be synchronously driven by the connecting strip 19 to move the push-pull column 18 downward, so that the movable angle piece 15 moves downward and approaches the fixed angle piece 13, thereby achieving the clamping effect on the cable.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly sealed and anti-detachment prefabricated junction box, comprising a box body (1) with an open top and a box cover (2) arranged above the open top of the box body (1), a wiring row (3) is arranged on the inner side of the box body (1), and wire holes are opened on both side walls of the box body (1), characterized in that: It also includes a wire hole sealing mechanism for enhancing the sealing performance of the interior of the box body (1) and a reinforcement mechanism for enhancing the firmness of the cable inside the box body (1); The wire hole sealing mechanism comprises a closed annular air bag (4) fixed in an annular shape inside the threading hole, a contraction groove (5) provided on the open end of the box body (1), and a pressurized gas-filled component arranged in the contraction groove (5); and a wire cleaning component corresponding to the threading hole is arranged on the outer wall of the box body (1); The reinforcing mechanism comprises a movable corner piece (15) and a fixed corner piece (13) which are symmetrically arranged in a corner shape between the closed annular airbag (4) and the wiring row (3). The fixed corner piece (13) is located below the movable corner piece (15), and a plurality of movable bars (16) are fixed at equal distances at both ends of the movable corner piece (15). A plurality of fixed bars (14) are fixed at equal distances at both ends of the fixed corner piece (13). The fixed bars (14) and the movable corner piece (15) are staggeredly distributed. A fixed column (17) is fixedly connected between the fixed corner piece (13) and the inner wall of the bottom end of the box body (1). A pressure component cooperating with the pressure slide seat (8) is arranged above the movable corner piece (15).

2. A highly sealed and anti-detachment prefabricated junction box according to claim 1, characterized in that: The pressurized gas-filled component comprises a pressurized slide seat (8) slidably arranged in the open end of the shrinkage groove (5), a pressurized airbag (6) is fixed between the pressurized slide seat (8) and the inner wall of the bottom end of the shrinkage groove (5), and an air injection pipe (7) is also arranged in the inner side wall of the box body (1), one end of the air injection pipe (7) penetrates into the inner side of the pressurized airbag (6), and the other end of the air injection pipe (7) penetrates into the inner side of the closed annular airbag (4).

3. The highly sealed and anti-detachment prefabricated junction box according to claim 1, characterized in that: The wire cleaning component comprises a mounting tube (9) detachably arranged on the outer wall of the box body (1) and a sponge ring (10) fixed inside the mounting tube (9).

4. The highly sealed and anti-detachment prefabricated junction box according to claim 1, characterized in that: The pressure-applying component comprises a connecting strip (19) vertically fixed to the top of the movable corner piece (15); a sliding slot connected to the shrinkage groove (5) is provided on the inner side wall of the box body (1); a connecting strip (19) is slidably arranged in the sliding slot; two ends of the connecting strip (19) are respectively fixedly connected to the pressure sliding seat (8) and the push-pull column (18).

5. The highly sealed and anti-detachment prefabricated junction box according to claim 2, characterized in that: Springs are provided on both sides of the pressurized airbag (6), and the two ends of the springs are respectively fixedly connected to the pressurized sliding seat (8) and the inner wall of the bottom end of the shrinkage groove (5).

6. The highly sealed and anti-detachment prefabricated junction box according to claim 3, characterized in that: An external thread locking ring (11) is fixed to one end of the installation tube (9) facing the box body (1), and an internal thread locking groove (12) matching the external thread locking ring (11) is provided on the outer wall of the box body (1).

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