A fireproof busbar trunking with self-expanding through-wall modules

Abstract

This utility model discloses a fireproof busbar trunking with a self-expanding through-wall module, including a sleeve. Two second circular plates are symmetrically arranged on the outside of the sleeve, and a first circular plate is arranged outside the second circular plates. A double-conical square tube is fixedly sleeved inside the first circular plate. A sealing element is connected between the two double-conical square tubes. The busbar trunking body is slidably sleeved inside the two double-conical square tubes. Two first sealing rings are symmetrically sleeved on the outside of the busbar trunking body. The first sealing rings are fixed to the inner wall of one end of the double-conical square tube. A fixing bolt is rotatably connected to the outside of the double-conical square tube, and the fixing bolt is threadedly connected to the busbar trunking body. A conical groove adapted to the double-conical square tube is provided on the inner wall of each end of the sleeve. The fit between the double-conical square tube and the conical groove of the sleeve automatically tightens at high temperatures due to the difference in thermal expansion coefficients. Combined with the molten filling of the silicone sleeve, this effectively seals the gap between the wall and the busbar trunking, preventing the spread of flames and smoke.

Description

Technical Field

[0001] This utility model relates to the field of busbar technology, and in particular to a fireproof busbar with a self-expanding through-wall module. Background Technology

[0002] In modern buildings, data centers, industrial plants, and large commercial complexes, the safety and reliability of power transmission systems are paramount. Busbar trunking, as a highly efficient power distribution device, has gradually replaced traditional cables as the mainstream choice for high-current transmission due to its advantages such as high current carrying capacity, flexible installation, and convenient maintenance. However, in extreme environments such as fires, the fire resistance of busbar trunking directly affects the continuous operation of the power system and personnel safety. Busbar trunking sections at wall openings are typically sealed with fixed fireproof materials (such as fireproof boards and fireproof bags), but the difference in expansion coefficients between the wall and the busbar trunking during a fire can create gaps, forming channels for the spread of flames and smoke. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a fireproof busbar trunking with a wall-penetrating module that has self-expanding.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fireproof busbar trunking with a wall-penetrating module and self-expanding, comprising a sleeve, two second spiral plates symmetrically arranged on the outside of the sleeve, a first spiral plate respectively arranged on the outside of the two second spiral plates, a double-conical square tube fixedly sleeved inside the two first spiral plates, a sealing element being snapped between the two double-conical square tubes, a busbar trunking body being slidably sleeved inside the two double-conical square tubes, two first sealing rings symmetrically sleeved on the outside of the busbar trunking body, the first sealing rings being fixed to the inner wall of one end of the double-conical square tube, a fixing bolt being rotatably connected to the outside of the double-conical square tube, the fixing bolt being threadedly connected to the busbar trunking body, and a conical groove adapted to the double-conical square tube being provided on the inner wall of both ends of the sleeve.

[0005] As a further description of the above technical solution: a countersunk hole is passed through the corner of the second U-shaped plate, and an expansion bolt is fitted inside the countersunk hole. A first sealing groove is opened at each end of the sleeve, and a second sealing ring is provided in the first sealing groove. The second sealing ring is fixedly connected to the first U-shaped plate. The design of the expansion bolt and the countersunk hole ensures that the second U-shaped plate is firmly fixed to the wall, preventing the structure from falling off in a fire. The countersunk hole hides the bolt head to reduce stress concentration. The design of the second sealing ring and the first sealing groove forms an elastic sealing layer between the sleeve and the first U-shaped plate to compensate for installation errors. In the event of a fire, the sealing ring expands to fill the micro gaps caused by thermal deformation.

[0006] As a further description of the above technical solution: the outer side of the first spiral plate has a through hole, a stud is fitted inside the hole, the stud is fixedly connected to the second spiral plate, a nut is threaded on the outer edge of the stud, and the nut abuts against the outside of the first spiral plate. The design of the stud and nut adjustment mechanism is to provide stable support after the nut is locked, so as to prevent the structure from loosening due to fire vibration.

[0007] As a further description of the above technical solution: the outer part of the double-conical square tube has a through positioning hole, the outer part of the first sealing ring has a through hole adapted to the positioning hole, the fixing bolt is rotatably sleeved in the positioning hole and the through hole, the outer part of the busbar trunking body has a threaded groove, and the end of the fixing bolt is threaded into the threaded groove. By setting the fixing bolt, the first U-shaped plate is fixed to the busbar trunking body, so that the fixing bolt fixes the position of the busbar trunking at room temperature, and melts at high temperature in the event of a fire, releasing the constraint on the busbar trunking, allowing the double-conical square tube to expand and seal freely. At the same time, the through hole design avoids the bolt from hindering the thermal expansion of the sealing ring.

[0008] As a further description of the above technical solution: the sealing element includes a second sealing groove formed at the end of one of the double-conical square tubes, a third sealing ring is provided in the second sealing groove, and the third sealing ring is telescopically connected to the end of the other double-conical square tube.

[0009] As a further description of the above technical solution: multiple damping rods are fixedly connected to the outer side of the third sealing ring, and the damping rods are fixedly connected to the end of the double-conical square tube. A spring is sleeved on the outer edge of the damping rod to form a dynamic seal at the joint of the two double-conical square tubes. In the event of a fire, the third sealing ring expands due to heat and fills the joint gap. The damping rods and springs allow the sealing ring to adapt to the pressure and maintain a continuous seal.

[0010] As a further description of the above technical solution: the first sealing ring is made of rubber, and a suitable silicone sleeve is fixedly fitted on the outer edge of one end of the double-conical square tube located inside the sleeve. The first sealing ring made of rubber is heat-resistant and has good elasticity. The silicone sleeve forms an additional fireproof layer at the end of the double-conical square tube. Under high temperature, it carbonizes to form a heat insulation barrier and delays heat conduction.

[0011] This utility model has the following beneficial effects:

[0012] 1. Compared with existing technologies, this fireproof busbar trunking with a wall-penetrating module and self-expansion features a double-conical square tube that automatically tightens with the conical groove of the sleeve at high temperatures due to the difference in thermal expansion coefficients. Combined with the molten filling of the silicone sleeve, it effectively seals the gap between the wall and the busbar trunking, blocking the spread of flames and smoke. The damping rod and spring structure in the sealing element allow the double-conical square tube to maintain close contact with the third sealing ring when it is heated and displaced during a fire, adapting to the expansion difference. The first sealing ring and the silicone sleeve form a double high-temperature seal. After the silicone sleeve melts, it further blocks the pores. The second and third sealing rings constitute multiple fire barriers, delaying the spread of fire.

[0013] 2. Compared with existing technologies, this fireproof busbar trunking with self-expanding through-wall modules has a fixing bolt that secures the busbar trunking body under normal conditions. In the event of a fire, it is allowed to slide due to heat, thus avoiding structural stress concentration. The expansion bolt and countersunk hole design ensures a firm connection between the second U-shaped plate and the wall. The split design facilitates on-site installation and subsequent maintenance without damaging the wall structure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the overall structure of a fireproof busbar trunking with a wall-penetrating module that self-expands, as proposed in this utility model.

[0015] Figure 2 This is a main sectional view of the overall structure of a fireproof busbar trunking with a wall-penetrating module that self-expands, as proposed in this utility model.

[0016] Figure 3 The overall structural diagram of a double-conical square tube with a self-expanding fireproof busbar trough featuring a wall-penetrating module proposed in this utility model;

[0017] Figure 4 This utility model presents an overall structural diagram of a fireproof busbar trunking with a self-expanding through-wall module.

[0018] Figure 5 This utility model proposes a fireproof busbar trunking with a self-expanding through-wall module. Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 6 This utility model proposes a fireproof busbar trunking with a self-expanding through-wall module. Figure 2 Enlarged view of the structure at point B.

[0020] Legend:

[0021] 1. Busbar trunking body; 2. First sealing ring; 3. Double-conical square tube; 4. First spiral plate; 5. Second spiral plate; 6. Countersunk hole; 7. Sleeve; 8. Fixing bolt; 9. Nut; 10. Stud; 11. Conical groove; 12. Through hole; 13. Positioning hole; 14. First sealing groove; 15. Second sealing ring; 16. Second sealing groove; 17. Third sealing ring; 18. Spring; 19. Damping rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 6 This utility model provides a fireproof busbar trunking with a self-expanding through-wall module: It includes a sleeve 7, with two second loop plates 5 symmetrically arranged on the outside of the sleeve 7. A first loop plate 4 is respectively provided on the outside of each of the two second loop plates 5. A double-conical square tube 3 is fixedly fitted inside each of the two first loop plates 4. A sealing element is connected between the two double-conical square tubes 3. A busbar trunking body 1 is slidably fitted inside the two double-conical square tubes 3. Two first sealing rings 2 are symmetrically fitted on the outside of the busbar trunking body 1. The first sealing rings 2 are fixed to the inner wall of one end of each double-conical square tube 3. A fixing bolt 8 is rotatably connected to the outside of the double-conical square tube 3 for fixation. Bolt 8 is threaded to busbar trunking body 1. The inner walls of both ends of sleeve 7 are respectively provided with a conical groove 11 that is adapted to double conical square tube 3. The first sealing ring 2 is made of rubber, and the outer edge of the double conical square tube 3 located inside sleeve 7 is fixedly fitted with a suitable silicone sleeve. The corner of the second circular plate 5 is penetrated by countersunk hole 6, and an expansion bolt is fitted in the countersunk hole 6. A first sealing groove 14 is opened at both ends of sleeve 7. A second sealing ring 15 is provided in the first sealing groove 14. The second sealing ring 15 is fixedly connected to the first circular plate 4. The length of sleeve 7 is greater than the depth of the hole in the wall. The external dimensions of sleeve 7 are the same as the dimensions of the hole in the wall.

[0024] The outer side of the first circular plate 4 has a through hole, and a stud 10 is fitted inside the hole. The stud 10 is fixedly connected to the second circular plate 5. A nut 9 is threaded on the outer edge of the stud 10. The nut 9 abuts against the outside of the first circular plate 4. The outer side of the double-conical square tube 3 has a through hole 13. The outer side of the first sealing ring 2 has a through hole 12 that matches the positioning hole 13. The fixing bolt 8 is rotatably fitted in the positioning hole 13 and the through hole 12. A threaded groove is opened on the outside of the busbar trunking body 1. The end of the fixing bolt 8 is threadedly connected in the threaded groove.

[0025] The sealing element includes a second sealing groove 16 opened at the end of one of the double-conical square tubes 3, a third sealing ring 17 provided in the second sealing groove 16, the third sealing ring 17 being telescopically connected to the end of the other double-conical square tube 3, and a plurality of damping rods 19 being fixedly connected to the outside of the third sealing ring 17, the damping rods 19 being fixedly connected to the end of the double-conical square tube 3, and a spring 18 being sleeved on the outer edge of the damping rods 19.

[0026] Working principle: First, the second circular plate 5 is fixed to both sides of the wall with expansion bolts. Then, the sleeve 7 is inserted into the hole in the wall. Next, two tapered square tubes are installed into the tapered grooves 11 at both ends of the sleeve 7, so that the third sealing ring 17 enters the second sealing groove 16. At the same time, the spring 18 and the damping rod 19 are compressed. Then, it is fixed by the stud 10 and the nut 9. The first circular plate 4 fixes the horizontal position of the sleeve 7. Then, the busbar trunking body 1 is inserted into the sleeve 7, and then fixed by... Nut 9 secures the busbar trunking body 1. In the event of a fire, due to the different expansion coefficients of the metal busbar trunking body 1 and the concrete wall, the double-conical square tube 3 slides into the conical groove 11 of the sleeve 7 when heated. The silicone sleeve melts and fills the gap when heated. The spring 18 in the seal pushes the third sealing ring 17 to maintain tight contact. The damping rod 19 prevents vibration from causing it to fall off. At the same time, the first sealing ring 2 carbonizes at high temperature, and the silicone sleeve melts to form a dense flame-retardant layer. The second and third sealing rings 17 expand to further block the channel.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fireproof bus duct with self-expanding through-wall module, comprising a sleeve (7), characterized in that: The sleeve (7) is symmetrically provided with two second spiral plates (5) on the outside. Each of the two second spiral plates (5) is provided with a first spiral plate (4) on the outside. A double-conical square tube (3) is fixedly fitted inside each of the two first spiral plates (4). A sealing element is snapped between the two double-conical square tubes (3). The busbar trunking body (1) is slidably fitted inside the two double-conical square tubes (3). Two first sealing rings (2) are symmetrically fitted on the outside of the busbar trunking body (1). The first sealing rings (2) are fixed to the inner wall of one end of the double-conical square tube (3). The double-conical square tube (3) is rotatably connected to a fixing bolt (8). The fixing bolt (8) is threadedly connected to the busbar trunking body (1). A conical groove (11) adapted to the double-conical square tube (3) is provided on the inner wall of each end of the sleeve (7).

2. A fire rated busway with a self-expanding through-wall module according to claim 1, wherein: The second spiral plate (5) has a countersunk hole (6) at its corner. An expansion bolt is fitted inside the countersunk hole (6). A first sealing groove (14) is opened at each end of the sleeve (7). A second sealing ring (15) is provided in the first sealing groove (14). The second sealing ring (15) is fixedly connected to the first spiral plate (4).

3. A fire rated busway with a self-expanding through-wall module according to claim 1, wherein: The outer side of the first spiral plate (4) has a through hole, and a stud (10) is fitted inside the hole. The stud (10) is fixedly connected to the second spiral plate (5). A nut (9) is threaded onto the outer edge of the stud (10), and the nut (9) abuts against the outside of the first spiral plate (4).

4. The self-expanding fire rated busway with a through-wall module of claim 1, wherein: The outer part of the double-conical square tube (3) has a through-hole (13), the outer part of the first sealing ring (2) has a through-hole (12) that is adapted to the positioning hole (13), the fixing bolt (8) is rotatably sleeved in the positioning hole (13) and the through-hole (12), the outer part of the busbar trunking body (1) has a threaded groove, and the end of the fixing bolt (8) is threadedly connected in the threaded groove.

5. The self-expanding fire rated busway with a through-wall module of claim 1, wherein: The sealing element includes a second sealing groove (16) formed at the end of one of the double-conical square tubes (3), and a third sealing ring (17) is provided in the second sealing groove (16), the third sealing ring (17) being telescopically connected to the end of the other double-conical square tube (3).

6. A fire rated busway with a self-expanding through-wall module according to claim 5, wherein: Multiple damping rods (19) are fixedly connected to the outside of the third sealing ring (17). The damping rods (19) are fixedly connected to the end of the double-conical square tube (3). A spring (18) is sleeved on the outer edge of the damping rods (19).

7. The self- expanding fire rated busway with a through- wall module of claim 1, wherein: The first sealing ring (2) is made of rubber, and a suitable silicone sleeve is fixedly fitted on the outer edge of one end of the double-conical square tube (3) located inside the sleeve (7).

Images