Seepage-proof prefabricated junction box

Abstract

The invention discloses an anti-seepage prefabricated junction box, and relates to the technical field of junction boxes, the anti-seepage prefabricated junction box comprises a box body with an open end, a box cover and a plurality of threading holes, the anti-seepage prefabricated junction box further comprises a sealing ring, two groups of compression mechanisms and a wire hole sealing mechanism, the sealing ring is attached to the bottom surface of the box cover, and the two groups of compression mechanisms are symmetrically distributed on the two sides of the box body; through arrangement of a sealing ring and a pressing mechanism, after cable connection operation is completed on the inner side of the box body and the box cover covers the open end of the box body, pressing plates in the pressing mechanism are synchronously pulled down on the two sides of the box body, so that locking insertion blocks are inserted into locking openings in advance and then pressing columns are pressed down in the process that the pressing plates are contracted in the sliding seat; in this way, the two sides of the box cover can be synchronously stressed to press the box body, the attaching degree between the sealing ring and the box cover is guaranteed, the sealing performance in the box body is improved, the self-fixing effect of the box cover can be achieved through cooperation between the locking insertion block and the locking opening, and the box cover can be fixed more easily and conveniently.

Description

Technical Field

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

[0002] The junction box is a common device in the field of power engineering, which mainly plays the role of protecting and connecting wires. 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] The connection between the existing box body and the box cover mainly uses multiple sets of screws to fix the box cover on the open end of the box body. Although the operation method is simple and the fixing effect is good, the screw fixing method is not only time-consuming and labor-intensive, but also requires manual use of tools to twist one by one. Moreover, after the box cover is fixed, it is often impossible to ensure that it fits fully with the box body, which leads to a certain gap between the box cover and the box body, reducing the sealing inside the box body, so that there is a risk of water seepage inside the box body. Summary of the invention

[0004] In order to solve the above technical problems, a water-proof prefabricated junction box is provided, which solves the problems of inconvenient connection between the box body and the box cover and poor sealing effect of the junction box in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a water-proof prefabricated junction box, comprising a box body with an open end, a box cover arranged above the open end of the box body, and a plurality of threading holes equidistantly opened on a side surface of the box body, and also comprising a sealing ring fixed on the open end of the box body, a pressing mechanism for pressurizing and locking the box cover, and a wire hole sealing mechanism for further enhancing the sealing of the inside of the box body, the sealing ring is attached to the bottom surface of the box cover, the pressing mechanism is divided into two groups, and the two groups of the pressing mechanisms are symmetrically distributed on both sides of the box body;

[0006] The pressing mechanism comprises a sliding seat with one end being open and vertically fixed on the side wall of the box body, and a pressing plate slidably arranged in the opening of the sliding seat, a C-shaped groove is provided on one side of the pressing plate, a pressure column fixedly connected to the side wall of the box cover is slidably arranged in the C-shaped groove, a sliding groove is vertically provided on the side wall of the sliding seat away from the box body, and a positioning part for maintaining a constant pressure under the box cover is built in the sliding groove;

[0007] The wire hole closing mechanism includes a closing plate vertically fixed on the outer wall of the box body, a circular wire insertion opening corresponding to the wire threading hole is formed on the closing plate, an annular airbag is fixed in the circular wire insertion opening, an air filling portion for pressurizing the annular airbag is provided on the closing plate, and an air storage portion cooperating with the air filling portion is also provided on the inner side of the slide seat.

[0008] Preferably, the air filling part includes a ventilation box fixed to the top of the closing plate and an air injection pipe fixedly connected to the side wall of the ventilation box. The top of the closing plate is provided with an air injection port connected to the interior of the annular airbag. A closed piston member is installed in the air injection port. The ventilation box is provided with a magnetic lifting member that cooperates with the closed piston member.

[0009] Preferably, the air storage portion is an air bag fixed between the bottom end of the pressure plate and the inner wall of the bottom end of the supply slide seat, and the end of the air injection pipe penetrates into the inner side of the supply slide seat and extends to the inside of the air bag.

[0010] Preferably, the closed piston member includes a fixing ring fixed in a circular shape on the inner side of the gas injection port and a piston member slidably arranged above the fixing ring, and two T-shaped rods are symmetrically arranged at the bottom of the fixing ring, and the T-shaped rods pass through the fixing ring and are fixedly connected to the piston member.

[0011] Preferably, the magnetic lifting member includes a control screw threadedly extending through the inner wall of the top end of the ventilation box, a magnetic block is fixedly embedded in the bottom end of the control screw, and a connecting magnetic sheet matching the magnetic block is fixedly embedded in the top surface of the piston member.

[0012] Preferably, a return spring is sleeved on the rod body of the vertical section of the T-shaped rod, and two ends of the return spring are fixedly connected to the fixing ring and the lateral end of the T-shaped rod respectively.

[0013] Preferably, a locking plug is fixed on the inner wall of the top end of the C-shaped groove, and a locking opening matched with the locking plug is opened on the rod body of the pressure column.

[0014] Preferably, the positioning portion includes a movable block slidably disposed in the slide groove and fixedly connected to the pressure plate, a control handle is hinged at the end of the movable block, and a C-shaped locking seat fixedly connected to the outer wall of the box body is disposed on the lower side of the slide seat.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) Through the arrangement of the sealing ring and the pressing mechanism, after the cable connection operation is completed inside the box body, the box cover is placed on the open end of the box body, and the pressure plates in the pressing mechanism are simultaneously pulled down on both sides of the box body, so that the locking plug is pre-inserted into the locking opening during the contraction of the slide seat, and then the pressure column is pressed down, so that the two sides of the box cover are simultaneously pressed toward the box body, ensuring the fit between the sealing ring and the box cover, improving the sealing inside the box body, and realizing the self-fixing effect of the box cover by utilizing the cooperation between the locking plug and the locking opening, making the fixing of the box cover easier.

[0017] (2) By setting up the wire hole sealing mechanism, when the cable is inserted into the inner side of the box body through the wire threading hole, the cable can simultaneously pass through the inner side of the annular airbag, and then when the pressure plate is pressed down to compress the box cover, the air storage part built into the slide seat can continuously inject air into the inner side of the annular airbag through the air filling part, thereby increasing the internal pressure of the annular airbag, causing the inner diameter of the annular airbag to shrink and fit tightly against the cable, so that the inside of the wire threading hole can be effectively sealed to prevent water from penetrating into the inner side of the box body through the gap between the inner wall of the wire threading hole and the cable.

[0018] (3) By setting up the magnetic lifting part and the closed piston part, the ventilation volume inside the corresponding gas injection port of the annular airbag can be conveniently adjusted according to the thickness of the cables inserted into the inner side of the multiple annular airbags, so that when the gas flow rate entering the ventilation box is constant, the shrinkage degree of the inner diameter of the multiple annular airbags can be adjusted to ensure that the annular airbags can fit well with cables of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0021] Figure 3 It is a schematic diagram of the internal structure of the closing plate and the ventilation box of the present invention;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at B in the middle;

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point C in the middle.

[0024] The numbers in the figure are:

[0025] 1. Box body; 2. Box cover; 3. Sealing ring; 4. Sliding seat; 5. Pressing plate; 6. Movable block; 7. Control handle; 8. C-type locking seat; 9. Locking plug; 10. Closing plate; 11. Annular air bag; 12. Air injection port; 13. Piston; 14. Fixing ring; 15. Reset spring; 16. Ventilation box; 17. Air injection pipe; 18. Air bag; 19. Control screw; 20. Connecting magnetic sheet; 21. Pressurization column; 22. T-bar. DETAILED DESCRIPTION

[0026] 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.

[0027] Reference Figure 1-5As shown, a water-proof prefabricated junction box comprises a box body 1 with an open end, a box cover 1 arranged above the open end of the box body 1, and a plurality of threading holes equidistantly opened on a side surface of the box body 1;

[0028] When in use, the cables are inserted into the inner side of the box body 1 through the threading holes in advance to complete the connection between the cables, and then the box cover 1 is installed on the open end of the box body 1 to seal the inside of the box body 1, thereby reducing the interference of the environment on the cable connection.

[0029] In the prior art, for the connection between the box body 1 and the box cover 1, a plurality of sets of screws are mainly used to fix the box cover 1 on the open end of the box body 1. Although the operation method is simple and the fixing effect is good, the screw fixing method is not only time-consuming and labor-intensive, but also requires manual use of tools to twist one by one. Moreover, after the box cover 1 is fixed, it is often impossible to ensure that it is fully fitted with the box body 1, thereby resulting in a certain gap between the box cover 1 and the box body 1, reducing the sealing of the inside of the box body 1, so that there is a risk of water seepage inside the box body 1;

[0030] To solve the above problems, refer to Figure 1 and Figure 2 As shown, it is worth noting that it also includes a sealing ring 3 fixed on the open end of the box body 1 and a pressing mechanism for pressurizing and locking the box cover 1. The sealing ring 3 is attached to the bottom surface of the box cover 1. The pressing mechanism is divided into two groups, and the two groups of pressing mechanisms are symmetrically distributed on both sides of the box body 1.

[0031] The pressing mechanism includes a slide seat 4 with an open end vertically fixed on the side wall of the box body 1 and a pressing plate 5 slidably arranged in the open end of the slide seat 4. A C-shaped groove is opened on one side of the pressing plate 5. A pressure column 21 fixed to the side wall of the box cover 1 is slidably arranged in the C-shaped groove.

[0032] A locking plug 9 is fixed on the inner wall at the top of the C-shaped groove, and a locking opening adapted to the locking plug 9 is provided on the rod of the pressure column 21;

[0033] By setting the sealing ring 3 and the pressing mechanism, after the cable connection operation is completed on the inner side of the box body 1, the box cover 1 is placed on the open end of the box body 1, and the pressure plates 5 in the pressing mechanism are pulled down synchronously on both sides of the box body 1, so that the locking plug 9 is inserted into the locking port in advance during the contraction of the slide seat 4, and then the pressure column 21 is pressed down, so that the two sides of the box cover 1 can be pressed toward the box body 1 synchronously, ensuring the fit between the sealing ring 3 and the box cover 1, improving the sealing inside the box body 1, and utilizing the cooperation between the locking plug 9 and the locking port to achieve the self-fixing effect of the box cover 1, making it easier to fix the box cover 1 manually.

[0034] Further, refer to Figure 2As shown, it is worth noting that a slide groove is vertically provided on the side wall of the slide seat 4 facing away from the box body 1, and a positioning portion for maintaining a constant downward pressure on the box cover 1 is built into the slide groove;

[0035] The positioning part includes a movable block 6 which is slidably arranged in the slide groove and fixedly connected to the pressing plate 5. The end of the movable block 6 is hinged with a control handle 7. A C-shaped locking seat 8 which is fixedly connected to the outer wall of the box body 1 is arranged on the lower side of the slide seat 4.

[0036] When the pressing plate 5 needs to be pulled down, the operating handle 7 is rotated in advance to be horizontal with the movable block 6. By pressing the operating handle 7 downward, the movable block 6 slides down in the slide groove, and the movable block 6 can act on the pressing plate 5 to contract the inner side of the slide seat 4 to press the box cover 1. When the operating handle 7 is moved to a position corresponding to the C-shaped locking seat 8, the operating handle 7 is rotated to be perpendicular to the movable block 6, and the operating handle 7 can be inserted into the inner side of the C-shaped locking seat 8, thereby positioning the operating handle 7, limiting the positions of the movable block 6 and the pressing plate 5, ensuring the stability of the box cover 1, and allowing the box cover 1 to stably press the sealing ring 3.

[0037] In addition, refer to Figure 1 As shown, it is worth noting that it also includes a wire hole sealing mechanism for further enhancing the sealing performance of the interior of the box body 1;

[0038] The wire hole closing mechanism includes a closing plate 10 vertically fixed on the outer wall of the box body 1, a circular opening for inserting a wire corresponding to the threading hole is formed on the closing plate 10, an annular airbag 11 is fixed in the circular opening for inserting a wire, a gas filling part for pressurizing the annular airbag 11 is provided on the closing plate 10, and an air storage part matching the gas filling part is also provided on the inner side of the slide seat 4;

[0039] By setting the wire hole closing mechanism, when the cable is passed through the threading hole to the inside of the box body 1, the cable can pass through the inside of the annular airbag 11 at the same time, and then when the pressing plate 5 is pressed down to compress the box cover 1, the air storage part built into the slide seat 4 can continuously inject air into the inside of the annular airbag 11 through the air filling part, thereby increasing the internal pressure of the annular airbag 11, so that the inner diameter of the annular airbag 11 shrinks and fits tightly against the cable, so that the inside of the threading hole can be effectively sealed to prevent water from penetrating into the inside of the box body 1 through the gap between the inner wall of the threading hole and the cable.

[0040] Further, refer to Figure 3 As shown, it is worth noting that the gas-filling part includes a vent box 16 fixed to the top of the closing plate 10 and a gas injection pipe 17 fixedly connected to the side wall of the vent box 16, and a gas injection port 12 connected to the inside of the annular airbag 11 is opened on the top of the closing plate 10;

[0041] The gas storage part is an air bag 18 fixed between the bottom end of the pressing plate 5 and the inner wall of the bottom end of the supply slide seat 4. The end of the air injection pipe 17 penetrates the inner side of the supply slide seat 4 and extends to the inside of the air bag 18.

[0042] When the pressing plate 5 is pressed down and causes it to shrink toward the inside of the slide seat 4, the pressing plate 5 can simultaneously compress the air bag 18, so that the internal gas of the air bag 18 is injected into the ventilation box 16 through the gas injection pipe 17, and then the gas finally passes into the annular air bag 11 through the gas injection port 12, thereby increasing the internal air pressure of the annular air bag 11, causing the inner diameter of the annular air bag 11 to shrink and fit tightly against the cable.

[0043] Further, refer to Figure 5 As shown, it is worth noting that the gas injection port 12 is built with a closed piston component, and the ventilation box 16 is provided with a magnetic lifting component that cooperates with the closed piston component;

[0044] By setting up the magnetic lifting parts and the closed piston parts, the ventilation volume inside the corresponding gas injection port 12 of the annular airbag 11 can be conveniently adjusted according to the thickness of the cables inserted into the inner side of the multiple groups of annular airbags 11, so that when the gas flow rate entering the ventilation box 16 is constant, the shrinkage degree of the inner diameter of the annular airbag 11 can be adjusted to ensure that the annular airbag 11 can fit well with cables of different thicknesses.

[0045] Further, refer to Figure 3-5 As shown, it is worth noting that the closed piston member includes a fixing ring 14 fixed to the inner side of the gas injection port 12 in an annular shape and a piston member 13 slidably arranged above the fixing ring 14, and two T-shaped rods 22 are symmetrically arranged at the bottom of the fixing ring 14, and the T-shaped rods 22 penetrate the fixing ring 14 and are fixedly connected to the piston member 13;

[0046] A return spring 15 is sleeved on the vertical section of the T-shaped rod 22, and the two ends of the return spring 15 are fixedly connected to the fixing ring 14 and the lateral end of the T-shaped rod 22 respectively;

[0047] The magnetic lifting member includes a control screw 19 threadedly penetrating the inner wall of the top end of the vent box 16, a magnetic block is fixedly embedded at the bottom end of the control screw 19, and a connecting magnetic sheet 20 matching the magnetic block is fixedly embedded at the top surface of the piston member 13;

[0048] By setting up the closed piston part and the magnetic lifting part, the knob controls the screw 19, and the screw 19 can be controlled to penetrate the inner side of the ventilation box 16 under the action of the thread, and then the magnetic attraction between the connecting magnetic sheet 20 and the magnetic block is controlled by adjusting the distance between the connecting magnetic sheet 20 and the magnetic block, so that the connecting magnetic sheet 20 drives the piston part 13 to slide up under the magnetic attraction, and the expansion degree between the piston part 13 and the fixing ring 14 is adjusted, thereby adjusting the flow rate of gas entering the gas injection port 12.

[0049] 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 water-proof prefabricated junction box, comprising a box body (1) with an open end, a box cover (1) arranged above the open end of the box body (1), and a plurality of threading holes equidistantly opened on a side surface of the box body (1), characterized in that: It also comprises a sealing ring (3) fixed on the open end of the box body (1), a pressing mechanism for pressurizing and locking the box cover (1), and a wire hole sealing mechanism for further enhancing the sealing performance of the inside of the box body (1), the sealing ring (3) being attached to the bottom surface of the box cover (1), the pressing mechanism being in two groups, and the two groups of pressing mechanisms being symmetrically distributed on both sides of the box body (1); The pressing mechanism comprises a slide seat (4) with one end being open and vertically fixed on the side wall of the box body (1) and a pressure plate (5) slidably arranged in the opening of the slide seat (4), a C-shaped groove being provided on one side of the pressure plate (5), a pressure column (21) being slidably arranged in the C-shaped groove and fixedly connected to the side wall of the box cover (1), a slide groove being vertically provided on the side wall of the slide seat (4) away from the box body (1), and a positioning portion being built into the slide groove for maintaining a constant downward pressure on the box cover (1); The wire hole closing mechanism comprises a closing plate (10) vertically fixed on the outer wall of the box body (1), the closing plate (10) is provided with a wire insertion circular opening corresponding to the wire threading hole, an annular air bag (11) is fixed in the wire insertion circular opening, the closing plate (10) is provided with an air filling portion for pressurizing the annular air bag (11), and an air storage portion cooperating with the air filling portion is also provided on the inner side of the slide seat (4).

2. The water-proof prefabricated junction box according to claim 1, characterized in that: The gas filling part includes a ventilation box (16) fixed to the top of the closing plate (10) and an air injection pipe (17) fixedly connected to the side wall of the ventilation box (16); the top of the closing plate (10) is provided with an air injection port (12) connected to the interior of the annular airbag (11); the air injection port (12) is equipped with a closed piston member; the ventilation box (16) is provided with a magnetic lifting member that cooperates with the closed piston member.

3. The water-proof prefabricated junction box according to claim 2, characterized in that: The gas storage portion is an air bag (18) fixed between the bottom end of the pressure plate (5) and the inner wall of the bottom end of the supply slide seat (4), and the end of the air injection pipe (17) penetrates the inner side of the supply slide seat (4) and extends to the inside of the air bag (18).

4. The water-proof prefabricated junction box according to claim 2, characterized in that: The closed piston member comprises a fixing ring (14) fixed in an annular shape inside the gas injection port (12) and a piston member (13) slidably arranged above the fixing ring (14); two T-shaped rods (22) are symmetrically arranged at the bottom of the fixing ring (14); the T-shaped rods (22) penetrate the fixing ring (14) and are fixedly connected to the piston member (13).

5. The water-proof prefabricated junction box according to claim 4, characterized in that: The magnetic lifting component comprises a control screw (19) threadedly penetrating the inner wall of the top end of the ventilation box (16), a magnetic block is fixedly embedded in the bottom end of the control screw (19), and a connecting magnetic sheet (20) matching the magnetic block is fixedly embedded in the top surface of the piston component (13).

6. The water-proof prefabricated junction box according to claim 4, characterized in that: A return spring (15) is sleeved on the rod body of the vertical section of the T-shaped rod (22), and the two ends of the return spring (15) are respectively fixedly connected to the fixing ring (14) and the lateral end of the T-shaped rod (22).

7. The water-proof prefabricated junction box according to claim 1, characterized in that: A locking plug block (9) is fixed on the inner wall of the top end of the C-shaped groove, and a locking opening matched with the locking plug block (9) is provided on the rod body of the pressure column (21).

8. The water-proof prefabricated junction box according to claim 1, characterized in that: The positioning portion comprises a movable block (6) slidably arranged in the slide groove and fixedly connected to the pressure plate (5), a control handle (7) is hingedly connected to the end of the movable block (6), and a C-shaped locking seat (8) fixedly connected to the outer wall of the box body (1) is arranged on the lower side of the slide seat (4).

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