Overhead PVC wire duct

Abstract

The utility model discloses an overhead PVC wire duct, relates to the related field of PVC wire ducts, and aims to solve the problems that in the prior art, only one position is arranged on the inner side of a buckle structure, when a cable is supported by the interior of the PVC wire duct for a long time and a lower structure is bent and deformed, a fastener is easy to separate from a buckle position and cannot be normally supported, and potential safety hazards exist. The end, facing the vertical portion of the L-shaped frame body, of the first rotary clamping piece is integrally connected with a first buckle piece, a second buckle groove is formed in the position, matched with the first buckle piece, of the vertical portion of the L-shaped frame body, and the first rotary clamping piece and the L-shaped frame body are buckled through the second buckle groove and the first buckle piece. A first buckling groove is formed in the end face, facing one end of the vertical portion of the L-shaped frame body, of the second rotating clamping piece, a second buckling piece is integrally connected to the position, matched with the first buckling groove, of the vertical portion of the L-shaped frame body, and the second rotating clamping piece and the L-shaped frame body are buckled through the first buckling groove and the second buckling piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to PVC wire duct related field, concretely to an overhead PVC wire duct. BACKGROUND

[0002] PVC wire duct, full name is polyvinyl chloride wire duct, is a kind of protective material widely used in electrical equipment internal wiring.It occupies an important position in electrical installation field with its unique material and design.PVC wire duct is made of high-quality PVC material, with insulation, flame-retardant self-extinguishing, impact resistance and other characteristics, these characteristics make it in 1200V and below electrical equipment, to the wire laid therein played a key mechanical protection and electrical protection role.After use, wiring is convenient, wiring is neat, installation is reliable, it is easy to find, repair and exchange line, greatly improve the safety and maintainability of electrical system.

[0003] Overhead PVC wire duct refers to installing PVC wire duct in the air, and suspending it above ceiling or wall through support or hanger, to realize the protection and arrangement of electric wire.This installation mode not only improves the neatness of wiring, but also effectively avoids the safety hazards that may be caused by ground or wall wiring.At the same time, overhead PVC wire duct is also convenient for later maintenance and replacement, reduces the maintenance cost of electrical system.

[0004] For example, the Chinese authorized patent (a PVC wire duct) with announcement number CN 202586208 U includes cover plate and groove plate, the cover plate is equipped with fastener, the groove plate is equipped with buckle position, the fastener is equipped with buckling surface, the buckling surface is circular arc, the buckle position is equipped with guide surface, and the guide surface is equipped with reverse extension edge relative to buckle position.The utility model effectively increases the width of guide surface by setting reverse extension edge on guide surface relative to buckle position, so that buckling surface can be attached to guide surface even when fastener is inwardly inclined, and fastener can be conveniently buckled into buckle position through guide surface.

[0005] Although the above-mentioned prior art has the function of buckling and fixing, the buckle structure only has one place on the inner side, when PVC wire duct supports cable for a long time, the lower structure is deformed by bending, the fastener is easy to separate from the buckle position, cannot normally support, and has safety hazard. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an overhead PVC wire duct to solve the problem that the buckle structure only has one place on the inner side in the above-mentioned background technology, when PVC wire duct supports cable for a long time, the lower structure is deformed by bending, the fastener is easy to separate from the buckle position, cannot normally support, and has safety hazard.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an overhead PVC cable trough, including a lower cable support plate, a fixed upright plate integrally connected to the upper ends of the front and rear ends of the lower cable support plate, an extension plate integrally connected to the front and rear ends of the lower cable support plate, and an upper mounting bracket, which is connected to the extension plate. The upper mounting bracket is composed of a first bracket and a second bracket, both of which include an L-shaped frame. The width of the lower end of the vertical part of the L-shaped frame is greater than the width of the upper end of the vertical part. The upper end surface of the extension plate is provided with an upper rotating groove along the front and rear ends of the lower end of the vertical part of the L-shaped frame.

[0008] A first rotating clamping member is rotatably connected in the upper rotating groove at the outer end. A first fastener is integrally connected to one end of the first rotating clamping member facing the vertical part of the L-shaped frame. A second fastening groove is opened at the matching position between the vertical part of the L-shaped frame and the first fastener. The lower end face of the second fastening groove is horizontal. The first rotating clamping member and the L-shaped frame are fastened together through the second fastening groove and the first fastener.

[0009] The inner end of the upper rotating groove is rotatably connected to a second rotating clamping member. The end face of the second rotating clamping member facing the vertical part of the L-shaped frame is provided with a first fastening groove. The upper end face of the first fastening groove is horizontal. The vertical part of the L-shaped frame is integrally connected to the first fastening groove with a second fastener. The second rotating clamping member and the L-shaped frame are fastened together through the first fastening groove and the second fastener.

[0010] Both the first and second rotating clamping components have an external torsion spring at the end away from the vertical part of the L-shaped frame.

[0011] Preferably, the extension plate has a middle sliding groove at the lower end of the upper rotating groove, and a lower support strip is fixed between the two middle sliding grooves at each end. A limit sliding rod is fixed in an array between the lower support strip and the inner end face of the extension plate.

[0012] Preferably, a sliding block is slidably connected inside the intermediate sliding slot, the sliding block slides along the limiting sliding rod, and a pressure spring is provided between the sliding block and the inner end face of the extension plate along the outside of the limiting sliding rod.

[0013] Preferably, an upper entry slot is formed on the upper surface of the extension plate between the two upper rotating slots at each end. The upper entry slot communicates with the upper end of the middle sliding slot. A connecting part is centrally connected to the lower end of the L-shaped frame. A triangular breaking part is integrally connected to the lower end of the connecting part. The width of the triangular breaking part matches the opening width of the upper entry slot. An embedding block is integrally connected to the upper end of the inner end of the sliding block. The embedding block matches the third snap groove formed between the L-shaped frame, the connecting part, and the triangular breaking part.

[0014] Preferably, a lower fixing plate is integrally connected to the lower middle of the sliding block, and a lower sliding groove is formed on the lower end surface of the extension plate along the sliding trajectory of the lower fixing plate.

[0015] Preferably, both the inner ends of the L-shaped frames on the first and second supports are integrally connected with protruding strips, and there are multiple arrays of protruding strips on each end. The protruding strips on the first and second supports are arranged in an intersecting manner. A fixed horizontal plate is fixedly fixed through the protruding strip on the first support from front to back, and a rectangular sliding groove is opened through the protruding strip on the second support. The fixed horizontal plate slides along the rectangular sliding groove.

[0016] Preferably, Z-shaped mounting parts are welded and fixed to the front and rear ends of the upper outer ends of the L-shaped frame on the first and second brackets.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) In this utility model, the fastening relationship is not direct. Instead, the first and second brackets are first slid along the fixed horizontal plate and the rectangular sliding groove so that the distance between the lower end of the inner side of the L-shaped frame matches the distance between the outer sides of the two second rotating clamping parts. Then, the upper mounting bracket is pressed down while the first and second brackets are pressed inward, which will cause the second rotating clamping parts to rotate inward and the first rotating clamping parts to rotate outward. Then, the upper mounting bracket is pressed down while the first and second brackets are pushed outward until the fastening process is completed. Both the inner and outer ends are equipped with fastening structures. When the structure is bent and deformed, the structure bends towards the middle, and the connection of the fastening structure at the inner end is relatively weakened, but the connection of the fastening structure at the outer end is increased. This solves the problem that the fastening structure only has one place on the inner side. When the PVC cable tray is bent and deformed due to long-term support of cables inside, the fastener is easy to disengage from the fastening position and cannot support properly, which poses a safety hazard.

[0019] (2) In this utility model, an external torsion spring is used to provide a continuous clamping force to ensure that the wire trough is not easy to loosen or deform after installation, thereby improving the safety and stability of wiring.

[0020] (3) In this utility model, in addition to the inner and outer end fastening, a lower end connecting structure is added. The triangular breaking part moves downward, pressing the sliding block to move outward, and the pressure spring is compressed. When the triangular breaking part moves to the lowest limit position, the sliding block loses its pushing force and moves towards the triangular breaking part under the action of the pressure spring, and the embedded block is stuck in the third fastening groove formed between the L-shaped frame, the connecting part and the triangular breaking part. This further ensures the tightness of the connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an overhead PVC cable tray according to the present invention from a main perspective.

[0022] Figure 2 This is a bottom view schematic diagram of an overhead PVC cable tray structure according to the present invention;

[0023] Figure 3 This is a schematic diagram of the upper mounting bracket for an overhead PVC cable tray according to the present invention.

[0024] Figure 4 This is a structural schematic diagram of the lower cable support plate, fixed upright plate, and extension plate of an overhead PVC cable trough according to the present invention.

[0025] Figure 5 This is a front view of an overhead PVC cable tray according to the present invention;

[0026] Figure 6 This is a cross-sectional view at point AA of an overhead PVC cable tray according to this utility model;

[0027] Figure 7 This is an enlarged view of section B of an overhead PVC cable tray according to this utility model.

[0028] In the diagram: 1. Lower cable support plate; 2. Fixed upright plate; 3. Extension plate; 4. Lower sliding slot; 5. Middle sliding slot; 6. Upper entry slot; 7. Lower support strip; 8. Limiting sliding rod; 9. Sliding block; 10. Embedded block; 11. Lower fixed plate; 12. Pressure spring; 13. Upper rotating slot; 14. First rotating clamping component; 15. First fastener; 16. Second rotating clamping component; 17. First fastening slot; 18. External torsion spring; 19. Upper mounting bracket; 20. First bracket; 21. Second bracket; 22. L-shaped frame; 23. Z-shaped mounting component; 24. Protruding strip; 25. Fixed horizontal plate; 26. Rectangular sliding slot; 27. Second fastener; 28. Second fastening slot; 29. ​​Connecting part; 30. Triangular breaking part. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] One embodiment of this utility model is provided:

[0031] (1) Basic structure of PVC cable trays, such as Figures 1-7 As shown:

[0032] The front and rear ends of the lower cable support plate 1 are integrally connected to the upper part of the fixed upright plate 2 for supporting and fixing the cable. At the same time, the front and rear ends of the lower cable support plate 1 are also integrally connected to the extension plate 3 to provide a foundation for subsequent installation.

[0033] It also includes an upper mounting bracket 19, which is connected to the extension plate 3. The upper mounting bracket 19 is composed of a first bracket 20 and a second bracket 21.

[0034] (2) Side-fastening structure design, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown:

[0035] The upper mounting bracket 19 is composed of a first bracket 20 and a second bracket 21, both of which include an L-shaped frame 22. The width of the lower end of the vertical part of the L-shaped frame 22 is greater than that of the upper end, which facilitates stable installation.

[0036] The upper end face of the extension plate 3 is provided with upper rotating grooves 13 at both the front and rear ends of the lower end of the vertical part of the L-shaped frame 22.

[0037] A first rotating clamping member 14 is rotatably connected in the rotating groove 13 on the outer end. The first rotating clamping member 14 is integrally connected to a first fastener 15 at one end facing the L-shaped frame 22, which engages with the second fastening groove 28 on the L-shaped frame 22. The lower end face of the second fastening groove 28 is horizontal.

[0038] The inner end of the rotating groove 13 is rotatably connected to the second rotating clamping member 16. One end of the second rotating clamping member 16 is provided with a first buckle groove 17, which is fastened to the second fastener 27 on the L-shaped frame 22. The upper surface of the first buckle groove 17 is horizontal.

[0039] Both the first rotating clamping member 14 and the second rotating clamping member 16 are provided with an external torsion spring 18 at the end away from the L-shaped frame 22 to maintain the clamped state. This allows the mounting bracket to be securely fastened to the extension plate, and the fastening can be released with a simple operation during disassembly, greatly simplifying the installation and disassembly process.

[0040] (3) Lower snap-fit ​​structure design, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown:

[0041] An intermediate sliding groove 5 is formed at the lower end of the upper rotating groove 13 inside the extension plate 3. A lower support strip 7 is fixed between two intermediate sliding grooves 5 at each end. Limiting sliding rods 8 are fixed in an array between the lower support strip 7 and the inner end face of the extension plate 3. A sliding block 9 is slidably connected inside the intermediate sliding groove 5. The fixed arrangement of the lower support strip 7 and the limiting sliding rods 8 provides a stable sliding track for the sliding block 9. The sliding block 9 slides along the limiting sliding rods 8 and a pressure spring 12 is provided between it and the inner end face of the extension plate 3 to provide a restoring force.

[0042] An upper entry slot 6 is provided on the upper surface of the extension plate 3 between the two upper rotating slots 13 at each end. The upper entry slot 6 is connected to the upper end of the inner sliding slot 5. A connecting part 29 is centrally connected to the lower end of the L-shaped frame 22. A triangular breakthrough part 30 is integrally connected to the lower end of the connecting part 29. The width of the triangular breakthrough part 30 matches the opening width of the upper entry slot 6. An embedded block 10 is integrally connected to the upper end of the inner end of the sliding block 9.

[0043] When the triangular protrusion 30 at the lower end of the L-shaped frame 22 moves downward through the upper entry slot 6, it presses the sliding block 9 outward, compressing the pressure spring 12. When the triangular protrusion 30 is in contact with the lower support strip 7, the sliding block 9 returns to its original position under the action of the pressure spring 12, and the embedded block 10 on it snaps into the third locking groove formed between the L-shaped frame 22, the connecting part 29, and the triangular protrusion 30, achieving further fixation. This design not only enhances the stability of the installation but also allows for easy disassembly by simply pushing the sliding block to release the latch without damaging the structure.

[0044] (4) The adjustment structure design of the first and second supports, such as Figure 1 and Figure 3 As shown:

[0045] The inner ends of the L-shaped frame 22 on the first bracket 20 and the second bracket 21 are integrally connected with protruding strips 24, which are cross-arranged and equipped with fixed horizontal plates 25 and rectangular sliding grooves 26. This allows the first bracket 20 and the second bracket 21 to slide and adjust along the fixed horizontal plates 25 and rectangular sliding grooves 26, matching the fastening process of the inner and outer end fastening structure. Furthermore, with the dimensions of the lower cable support plate 1, the fixed upright plate 2, and the extension plate 3 remaining unchanged, the pushable structure of the first bracket 20 and the second bracket 21 on the upper mounting bracket 19 does not require an additional fixing structure or additional operating steps.

[0046] Meanwhile, Z-shaped mounting parts 23 are welded and fixed to the front and rear ends of the upper outer end of the L-shaped frame 22, which facilitates fixed connection with the upper structure.

[0047] (5) Convenient operation of the lower sliding slot and the lower fixed plate, such as Figure 4 , Figure 6 and Figure 7 Figure 1 Figure 3 Figure 2 Figure 6 Figure 7 As shown:

[0048] The lower end of the sliding block 9 is integrally connected to the lower fixing plate 11, and the lower end surface of the extension plate 3 has a lower sliding groove 4 along the sliding trajectory of the lower fixing plate 11. When disassembly is required, simply push the lower fixing plate 11 outward to release the engagement between the embedded block 10 and the upper mounting bracket 19, facilitating disassembly. This makes the disassembly process simpler and more convenient, requiring no destructive operation and reducing maintenance costs.

[0049] Working principle: The first bracket 20 and the second bracket 21 are slid along the fixed horizontal plate 25 and the rectangular sliding groove 26 so that the distance at the lower end of the inner side of the L-shaped frame 22 matches the distance at the outer side of the two second rotating clamping parts 16; then the upper mounting bracket 19 is pressed down while the first bracket 20 and the second bracket 21 are pressed inward, which will cause the second rotating clamping parts 16 to rotate inward and the first rotating clamping parts 14 to rotate outward; then the upper mounting bracket 19 is pressed down while the first bracket 20 and the second bracket 21 are pushed outward, so that the triangular breaking part 30 moves downward through the upper entry slot 6 and fits against the upper end surface of the lower support strip 7.

[0050] When the triangular breakthrough part 30 passes through the upper slot 6, it contacts the upper end of the embedded block 10. Due to the shape of the triangular breakthrough part 30 and the connection relationship where the sliding block 9 can slide along the limiting sliding rod 8, the triangular breakthrough part 30 moves downward and presses the sliding block 9 outward, compressing the pressure spring 12. When the triangular breakthrough part 30 is in contact with the upper end face of the lower support strip 7, the sliding block 9 loses its pushing force and moves towards the triangular breakthrough part 30 under the action of the pressure spring 12. The embedded block 10 is locked in the third buckle groove formed between the L-shaped frame 22, the connecting part 29, and the triangular breakthrough part 30. At the same time, the L-shaped frame 22 loses its pushing force on the first rotating clamping member 14 and the second rotating clamping member 16. Under the action of the outer torsion spring 18, the first rotating clamping member 14 and the second rotating clamping member 16 rotate towards the L-shaped frame 22. The first fastener 15 is locked in the second buckle groove 28, and the second fastener 27 is locked in the first buckle groove 17.

[0051] When it is necessary to disassemble this structure, place your fingers between the two lower fixing plates 11 on each side and push the lower fixing plates 11 outwards. This will cause the fastening relationship between the embedded block 10 and the upper mounting bracket 19 to fail. Then rotate the first rotating clamping member 14 and the second rotating clamping member 16 away from the L-shaped frame 22. The fastening relationship between the first rotating clamping member 14 and the second rotating clamping member 16 and the L-shaped frame 22 will fail, and the structure can be separated.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An overhead PVC cable tray, comprising a lower cable support plate (1), wherein a fixed upright plate (2) is integrally connected to the upper ends of the front and rear ends of the lower cable support plate (1), and an extension plate (3) is integrally connected to the front and rear ends of the lower cable support plate (1), and further comprising an upper mounting bracket (19), wherein the upper mounting bracket (19) is connected to the extension plate (3), characterized in that: The upper mounting bracket (19) is composed of a first bracket (20) and a second bracket (21). Both the first bracket (20) and the second bracket (21) include an L-shaped frame (22). The width of the lower end of the vertical part of the L-shaped frame (22) is greater than the width of the upper end of the vertical part. The upper end face of the extension plate (3) is provided with an upper rotating groove (13) along the front and rear ends of the lower end of the vertical part of the L-shaped frame (22). A first rotating clamping member (14) is rotatably connected in the upper rotating groove (13) at the outer end. The first rotating clamping member (14) is integrally connected to a first fastener (15) at one end facing the vertical part of the L-shaped frame (22). A second fastening groove (28) is opened at the matching position between the vertical part of the L-shaped frame (22) and the first fastener (15). The lower end face of the second fastening groove (28) is horizontal. The first rotating clamping member (14) and the L-shaped frame (22) are fastened together through the second fastening groove (28) and the first fastener (15). The inner end of the upper rotating groove (13) is rotatably connected to a second rotating clamping member (16). The second rotating clamping member (16) has a first fastening groove (17) on its end face facing the vertical part of the L-shaped frame (22). The upper end face of the first fastening groove (17) is horizontal. The vertical part of the L-shaped frame (22) is integrally connected to the first fastening groove (17) with a second fastener (27). The second rotating clamping member (16) and the L-shaped frame (22) are fastened together through the first fastening groove (17) and the second fastener (27). Both the first rotating clamping member (14) and the second rotating clamping member (16) are provided with an external torsion spring (18) at the end away from the vertical part of the L-shaped frame (22).

2. The overhead PVC cable tray according to claim 1, characterized in that: The extension plate (3) has a middle sliding groove (5) at the lower end of the upper rotating groove (13) inside. A lower support strip (7) is fixed between the two middle sliding grooves (5) at each end. A limit sliding rod (8) is fixed in an array between the lower support strip (7) and the inner end face of the extension plate (3).

3. The overhead PVC cable tray according to claim 2, characterized in that: The sliding slot (5) is slidably connected to a sliding block (9), which slides along the limiting sliding rod (8). A pressure spring (12) is provided between the sliding block (9) and the inner end face of the extension plate (3) along the outside of the limiting sliding rod (8).

4. The overhead PVC cable tray according to claim 3, characterized in that: The upper end face of the extension plate (3) is provided with an upper entry slot (6) between the two upper rotating slots (13) at each end. The upper entry slot (6) is connected to the upper end of the middle sliding slot (5). The lower end of the L-shaped frame (22) is connected to a connecting part (29). The lower end of the connecting part (29) is integrally connected to a triangular breakthrough part (30). The width of the triangular breakthrough part (30) matches the opening width of the upper entry slot (6). The upper end of the inner end of the sliding block (9) is integrally connected to an embedding block (10). The embedding block (10) matches the third snap groove formed between the L-shaped frame (22), the connecting part (29), and the triangular breakthrough part (30).

5. The overhead PVC cable tray according to claim 3, characterized in that: The lower end of the sliding block (9) is integrally connected to the lower fixing plate (11), and the lower end surface of the extension plate (3) is provided with a lower sliding groove (4) along the sliding trajectory of the lower fixing plate (11).

6. The overhead PVC cable tray according to claim 1, characterized in that: The inner ends of the L-shaped frame (22) on the first bracket (20) and the second bracket (21) are integrally connected with protruding strips (24). There are multiple protruding strips (24) in the array at each end, and the protruding strips (24) on the first bracket (20) and the protruding strips (24) on the second bracket (21) are arranged crosswise. A fixed horizontal plate (25) is fixedly fixed through the protruding strip (24) on the first bracket (20) and a rectangular sliding groove (26) is opened through the protruding strip (24) on the second bracket (21). The fixed horizontal plate (25) slides along the rectangular sliding groove (26).

7. The overhead PVC cable tray according to claim 1, characterized in that: Z-shaped mounting parts (23) are welded and fixed to the front and rear ends of the upper outer ends of the L-shaped frame (22) on the first bracket (20) and the second bracket (21).

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