Bus duct

Abstract

The invention discloses a bus duct, and belongs to the field of power supply switching equipment. A bus duct comprises a frame which comprises a side connecting plate and a cover plate, the side connecting plate and the cover plate jointly form an I-shaped structure through a connecting piece, the side connecting plate is provided with ventilation holes, and a bus bar is installed in the I-shaped structure; the protection assembly is installed in the frame and comprises a sealing plate and a heat sensitive element, a first groove is formed in the side, close to the busbar, of the upper cover plate, the sealing plate is installed in the first groove through an elastic piece, and the heat sensitive element is clamped between the sealing plate and the side connecting plate. The heat sensitive element deforms or fractures, after the sealing plate loses the support of the heat sensitive element, the ventilation hole is opened and closed under the action of the elastic piece, the internal damage of the bus duct caused by external overheating is prevented, and the protection assembly carries out forced heat exchange on the internal of the bus duct to ensure that the internal temperature of the bus duct is well controlled.

Description

Technical Field

[0001] The invention relates to the field of power supply switching equipment, and in particular to a bus duct. Background Art

[0002] As the demand for electricity in modern buildings and industrial facilities continues to increase, traditional cable wiring methods are gradually showing their limitations. As an efficient current transmission system, bus duct has been widely used in large buildings, factories and other application scenarios that require high-capacity power transmission. The bus duct system not only provides higher current carrying capacity than traditional cables, but also simplifies the installation process and facilitates subsequent maintenance and expansion.

[0003] Under high-load operation, the conductors inside the bus duct will generate a lot of heat. If the heat cannot be dissipated promptly and effectively, the bus duct temperature will be too high, thus affecting its service life and safety. Traditional bus ducts mostly rely on natural convection heat dissipation, which has a poor heat dissipation effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the bus duct cannot dissipate the heat in a timely and effective manner when operating at high load, which will cause the bus duct temperature to be too high, thereby affecting its service life and safety.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bus duct comprises: a frame, comprising a side connecting plate and a cover plate, wherein the side connecting plate and the cover plate together form an I-shaped structure through a connecting piece, the side connecting plate has a ventilation hole, and a bus bar is installed in the I-shaped structure; a protective component is installed in the frame, comprising a sealing plate and a thermal sensitive element, the upper cover plate has a first groove on one side close to the bus bar, the sealing plate is installed in the first groove through an elastic piece, and the thermal sensitive element is clamped between the sealing plate and the side connecting plate.

[0007] In order to provide a stable power supply, increase efficient heat dissipation design, and extend the life of the equipment, preferably, the side connecting plate is Z-shaped, including a first horizontal portion, a bent portion, and a second horizontal portion, the ventilation hole is opened on the first horizontal portion, and a holder compatible with the thermal sensitive element is fixedly installed on the opposite surface of the bent portion and the sealing plate, and heat dissipation fins are equidistantly installed on the outer surface of the second horizontal portion.

[0008] In order to ensure stable operation of servers and network equipment and reduce the risk of hardware damage due to overheating, the cover plate is further provided with a cavity inside, the cavity is filled with coolant and a pump body for pressurizing the coolant is installed therein, and cooling grooves are equidistantly provided inside the second horizontal portion along the extension direction, and the cooling grooves are connected to the cavity.

[0009] Furthermore, connectors are fixedly installed at both ends of the cooling groove, and when the side connecting plate and the cover plate are connected, the connectors extend into the cavity.

[0010] In order to realize the function of automatically starting cooling of the bus duct under abnormal temperature conditions and improve the safety and reliability of the system, further, a through groove is opened in the sealing plate, and the number of the through grooves is consistent with the number of the sockets. A push rod is slidably installed in the through groove through a telescopic member, and one end of the push rod passes through the socket and abuts against the heat sensitive element, and a first connecting pin is fixedly installed on the other end of the push rod, and a first plug block is fixedly installed on the end of the first connecting pin away from the push rod, and a second installation groove for accommodating the first plug block is opened in the cover plate, and the second installation groove is connected to the cavity.

[0011] Furthermore, the telescopic member includes a cylinder and a movable rod, the cylinder is fixedly mounted on the inner wall of the through groove, the cylinder is filled with paraffin, one end of the movable rod is movably mounted in the cylinder, and the other end of the movable rod is fixedly connected to the push rod.

[0012] In order to achieve the purpose of automatic pressure relief and heat dissipation, further, the thermal sensitive element includes a glass cover and an expansion fluid filled in the glass cover, and the end of the glass cover close to the sealing plate has a second groove.

[0013] In order to effectively prevent equipment failure or safety accidents caused by overheating, further, an exhaust groove is opened in the bending portion, and a sealing plug is installed in the exhaust groove through an elastic member.

[0014] In order to further enhance the heat dissipation effect, further, a second connecting pin is fixedly installed on the sealing plate, a second plug is fixedly installed on one end of the second connecting pin away from the sealing plate, a third mounting groove for accommodating the second plug is opened in the cover plate, and the third mounting groove is connected to the cavity.

[0015] In order to ensure that the busbars can maintain good electrical contact when connected and prevent the external environment from affecting the connection area, further, connecting bars are provided at the two ends of the busbars, and baffles are provided on the four sides of the outer walls adjacent to the connecting bars, and the baffles are used to seal the connection area between the two connecting bars.

[0016] Compared with the prior art, the present invention provides a bus duct having the following beneficial effects:

[0017] 1. In the bus duct, under normal working conditions, the sealing plate remains in an open state, and the heat generated by the busbar during operation is naturally ventilated and dissipated through the ventilation holes. When the internal temperature of the bus duct exceeds the preset value, which is approximately between 46°C and 68°C, the movable rod moves outward under the action of the melting and expansion of paraffin, driving the push rod to extend to the side close to the heat-sensitive element. The first plug follows the movement and loses the blockage of the connector. The coolant is drawn out of the cavity and enters the cooling groove through the connector. The coolant contacts the busbar in one cooling groove, absorbs heat and dissipates heat. When the internal temperature of the bus duct is greater than the preset value of the heat-sensitive element, the heat-sensitive element ruptures, and the movement of the sealing plate drives the second connecting pin and the second plug to move. The second plug is removed from the third mounting groove, so that the cavity is connected to the connector. The coolant is drawn out of the cavity and enters the cooling groove through the connector. The coolant contacts the busbar in two cooling grooves, absorbs heat and dissipates heat. Energy-saving benefits are achieved through this adaptive opening.

[0018] 2. The bus duct has greatly enhanced its heat dissipation capacity by installing heat dissipation fins on the outer surface of the second horizontal part, ensuring that it can maintain a low operating temperature even under high load conditions. The sealing plate and heat-sensitive components are used in conjunction to respond quickly under abnormal conditions to prevent accidents caused by overheating.

[0019] 3. Under normal working temperature and pressure, the sealing plug of the bus duct remains in a closed state under the action of the second spring, and the exhaust groove is in a closed state. When the temperature or pressure inside the bus duct exceeds the preset value, the sealing plug is affected by the internal pressure, the push rod extends and overcomes the elastic force of the second spring to be pushed open. After the exhaust groove is opened, excess gas or steam inside can be quickly discharged to reduce the internal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a bus duct proposed by the present invention;

[0021] Figure 2 A schematic diagram of the side connecting plate structure of a bus duct proposed by the present invention;

[0022] Figure 3 A schematic diagram of the connection structure between the side connecting plate and the cover plate of a bus duct proposed by the present invention;

[0023] Figure 4 A schematic diagram of the internal structure of a sealing plate of a bus duct proposed by the present invention;

[0024] Figure 5 A bus duct proposed by the present invention Figure 2The structural diagram of part A in the figure;

[0025] Figure 6 A bus duct proposed by the present invention Figure 3 Schematic diagram of the structure of part B.

[0026] In the figure: 100, frame; 110, side connecting plate; 111, first horizontal part; 101, ventilation hole; 112, bending part; 102, card seat; 106, exhaust groove; 107, sealing plug; 108, second spring; 113, second horizontal part; 103, heat dissipation fin; 104, cooling groove; 105, connector; 120, cover plate; 121, first groove; 122, cavity; 123, second mounting groove; 124, third mounting groove Groove; 130, connecting piece; 140, baffle; 200, protective assembly; 210, sealing plate; 211, through groove; 212, push rod; 213, first connecting pin; 214, first plug; 215, cylinder; 216, movable rod; 217, second connecting pin; 218, second plug; 220, thermal sensitive element; 221, glass cover; 201, second groove; 230, first spring; 300, bus bar; 310, connecting bar. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Example:

[0030] Reference Figure 1-Figure 6 A bus duct includes a frame 100, a protective component 200 and a bus bar 300.

[0031] Specifically, the frame 100 includes a side connecting plate 110 and a cover plate 120, and the side connecting plate 110 and the cover plate 120 together form an I-shaped structure through a connecting piece 130. A layer of fireproof cotton is bonded inside the side connecting plate 110 and the cover plate 120, which has the effect of being fireproof and waterproof. The side connecting plate 110 has a ventilation hole 101 for natural ventilation and heat dissipation, and the busbar 300 is installed in the I-shaped structure.

[0032] Preferably, the connecting member 130 is a bent U-shaped member to facilitate the installation of the fixing bolts.

[0033] Specifically, the protective assembly 200 is installed in the frame 100, including a sealing plate 210 and a thermal sensitive element 220. The upper cover plate 120 has a first groove 121 on one side close to the busbar 300. The sealing plate 210 is installed in the first groove 121 through an elastic member, and the elastic member is preferably a first spring 230. The thermal sensitive element 220 is clamped between the sealing plate 210 and the side connecting plate 110.

[0034] Through the arrangement of the above structure, under normal working conditions, the sealing plate 210 remains in an open state, and the heat generated by the busbar 300 during operation is naturally ventilated and dissipated through the ventilation holes 101. When the temperature inside the bus duct exceeds the preset safety value, the heat-sensitive element 220 will be deformed or broken. After the sealing plate 210 loses the support of the heat-sensitive element 220, it will open under the action of the elastic member and close the ventilation holes 101 to prevent external overheating from causing damage to the inside of the bus duct. At the same time, the protective component 200 forces heat exchange inside the bus duct to ensure that the temperature inside the bus duct is well controlled.

[0035] In practical applications, due to the large demand for electricity in the production environment, the power transmission system needs to withstand a higher load and needs to have certain fire and explosion resistance capabilities. Referring to the figure, preferably, the side connecting plate 110 is Z-shaped, including a first horizontal portion 111, a bending portion 112 and a second horizontal portion 113. The first horizontal portion 111 is located at the top of the Z-shaped structure, and the ventilation hole 101 is opened on the first horizontal portion 111 for natural ventilation and heat dissipation. The bending portion 112 is located in the middle part of the Z-shaped structure. A holder 102 compatible with the thermal sensitive element 220 is fixedly installed on the opposite surface of the sealing plate 210 for fixing the thermal sensitive element 220. The second horizontal portion 113 is located at the bottom of the Z-shaped structure, and heat dissipation fins 103 are equidistantly installed on the outer surface to increase the heat dissipation area and improve the heat dissipation efficiency.

[0036] By installing heat dissipation fins 103 on the outer surface of the second horizontal portion 113, the heat dissipation capacity of the bus duct is greatly enhanced, ensuring that a low operating temperature can be maintained even under high load conditions. In addition, the use of the sealing plate 210 and the thermal sensitive element 220 can respond quickly under abnormal conditions to prevent accidents caused by overheating.

[0037] In high-rise buildings, the internal power lines are complex, requiring a reliable power transmission system with good heat dissipation performance. Figure 3The cover plate 120 has a cavity 122 inside, the cavity 122 is filled with coolant and a pump body for pressurizing the coolant is installed therein, and cooling grooves 104 are equidistantly provided inside the second horizontal portion 113 along the extension direction, the cooling grooves 104 are connected to the cavity 122, and the coolant contacts the busbar 300 through these cooling grooves 104 to take away the heat.

[0038] The cooling slot 104 consists of two paths, which are controlled by different opening mechanisms and are opened adaptively according to the temperature in the bus duct to achieve energy saving benefits.

[0039] Furthermore, connectors 105 are fixedly installed at both ends of the cooling groove 104. When the side connecting plate 110 and the cover plate 120 are connected, the connector 105 extends into the cavity 122 to form a complete coolant circulation path.

[0040] After the pump body is started, the coolant is pumped out from the cavity 122 and enters the cooling tank 104 through the connector 105. The coolant contacts the busbar 300 in the cooling tank 104 and absorbs heat. The heated coolant returns to the cavity 122 through the connector 105 at the other end and continues to circulate. This cycle is continuously carried out to ensure that the temperature inside the busbar is well controlled.

[0041] It should be noted that when designing the bus duct, good sealing of the connector 105 is crucial to ensuring the safety and reliability of the system. The connector 105 is designed with an uneven surface. Such a design can form a tight fit through the mutual engagement of the convex and concave surfaces during connection, thereby improving the sealing and preventing coolant leakage. When the side connecting plate 110 and the cover plate 120 are connected, the connector 105 will extend into the cavity 122, and the uneven structure of the connector 105 will fit tightly with the wall of the cavity 122 to form a closed channel. At the same time, the uneven surface can provide greater friction during connection to ensure a tight fit between the connector 105 and the cavity 122. This structure can also further enhance the sealing performance by compressing the sealing gasket or using sealant.

[0042] Reference Figure 4 and Figure 5 A through groove 211 is provided in the sealing plate 210, and the number of the through grooves 211 is consistent with the number of the card seat 102. A push rod 212 is slidably installed in the through groove 211 through a telescopic member. One end of the push rod 212 passes through the card seat 102 and abuts against the heat sensitive element 220. A first connecting pin 213 is fixedly installed on the other end of the push rod 212. A first plug 214 is fixedly installed on the end of the first connecting pin 213 away from the push rod 212. A second mounting groove 123 for accommodating the first plug 214 is provided in the cover plate 120, and the second mounting groove 123 is communicated with the cavity 122.

[0043] Specifically, the telescopic member includes a cylinder 215 and a movable rod 216. The cylinder 215 is fixedly mounted on the inner wall of the through groove 211. The cylinder 215 is filled with paraffin. The paraffin is temperature-sensitive and changes its state as the temperature changes. One end of the movable rod 216 is movably mounted in the cylinder 215, and the other end of the movable rod 216 is fixedly connected to the push rod 212. When the temperature rises, the paraffin expands, pushing the movable rod 216 to move outward, thereby driving the push rod 212 to move.

[0044] Under normal operating temperature, paraffin is in solid state, the movable rod 216 is fixed in the cylinder 215, the push rod 212 remains stationary, and the first plug 214 is located in the second mounting groove 123. When the internal temperature of the bus duct exceeds the preset value, the preset value range is approximately between 46°C and 68°C, and the movable rod 216 moves outward under the action of the melting and expansion of the paraffin, driving the push rod 212 to extend to the side close to the heat-sensitive element 220. The first plug 214 follows the movement and loses the blockage of the connector 105. The coolant is drawn out of the cavity 122 and enters the cooling groove 104 through the connector 105. The coolant contacts the bus bar 300 in the cooling groove 104, absorbs heat and dissipates heat. When the temperature returns to normal, the paraffin solidifies again, the movable rod 216 retracts, and the push rod 212 resets, so that the bus duct can automatically start cooling under abnormal temperature conditions, thereby improving the safety and reliability of the system.

[0045] Specifically, refer to Figure 4 and Figure 5 The heat sensitive element 220 includes a glass cover 221 and an expansion liquid filled in the glass cover 221. The glass cover 221 has a certain strength and can withstand the pressure under normal working conditions. The heating temperature range of the expansion liquid is approximately between 68°C and 100°C. The end of the glass cover 221 close to the sealing plate 210 has a second groove 201. The second groove 201 is used to accommodate one end of the push rod 212 to ensure that the push rod 212 will not generate pressure on the glass cover 221 and break when it is heated and expanded.

[0046] Under normal operating temperature, the expansion liquid is in a static state, the pressure in the glass cover 221 remains stable, one end of the push rod 212 does not contact the glass cover 221 of the thermal sensitive element 220, and when the internal temperature of the bus duct exceeds the preset value of the paraffin but does not reach the preset value of the expansion liquid, when the push rod 212 moves outward, it will not generate pressure on the glass cover 221 and cause it to break.

[0047] Reference Figure 3 and Figure 6An exhaust groove 106 is provided in the bending portion 112. The purpose of the design of the air groove is to discharge excess gas or steam in time when the temperature or pressure inside the bus duct rises abnormally. A sealing plug 107 is installed in the exhaust groove 106 through an elastic member. Under normal circumstances, the sealing plug 107 blocks the exhaust groove 106 under the action of the elastic member to prevent dust and moisture from entering the bus duct. The elastic member is preferably a second spring 108. Under normal working conditions, the second spring 108 keeps the sealing plug 107 in a closed state. When the internal pressure exceeds a preset value, the sealing plug 107 will be pushed open and the exhaust groove 106 will open.

[0048] Under normal operating temperature and pressure, the sealing plug 107 remains in a closed state under the action of the second spring 108, and the exhaust groove 106 is in a closed state. When the temperature or pressure inside the bus duct exceeds a preset value, the sealing plug 107 is affected by the internal pressure, and the push rod 212 extends and overcomes the elastic force of the second spring 108 to be pushed open. After the exhaust groove 106 is opened, excess gas or steam inside can be quickly discharged to reduce the internal pressure.

[0049] Reference Figure 2 A second connecting pin 217 is fixedly mounted on the sealing plate 210 , and a second plug 218 is fixedly mounted on one end of the second connecting pin 217 away from the sealing plate 210 . A third mounting groove 124 for accommodating the second plug 218 is opened in the cover plate 120 , and the third mounting groove 124 is connected to the cavity 122 .

[0050] When the first plug 214 moves, the second plug 218 remains stable. When the internal temperature of the bus duct is greater than the preset value of the thermal sensitive element 220, the thermal sensitive element 220 ruptures, and the movement of the sealing plate 210 drives the second connecting pin 217 and the second plug 218 to move. The second plug 218 moves out of the third mounting groove 124, so that the cavity 122 is connected with the connector 105. The coolant is drawn out of the cavity 122 and enters the cooling groove 104 through the connector 105. The coolant contacts the bus bar 300 in the two cooling grooves 104 to absorb heat for heat dissipation.

[0051] Reference Figure 1 The two ends of the busbar 300 are provided with connecting bars 310 for connecting with other busbars 300 or electrical equipment. The design of the connecting bars 310 needs to ensure the reliability and safety of the electrical connection. The four sides of the outer wall of the adjacent connecting bars 310 are provided with baffles 140, which are used to seal the connection area of ​​the two connecting bars 310.

[0052] During installation, the connection area between the connection rows 310 is sealed by the baffle 140 to ensure reliable electrical connection of the bus duct. Under normal working conditions, the baffle 140 completely seals the connection area between the connection rows 310 to prevent external impurities from entering. During maintenance, the design of the baffle 140 makes it simple and convenient to disassemble and inspect the connection area, which is convenient for regular inspection and maintenance.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bus duct, characterized in that: include: A frame (100) comprises a side connection plate (110) and a cover plate (120), wherein the side connection plate (110) and the cover plate (120) together form an I-shaped structure via a connection piece (130), the side connection plate (110) has a ventilation hole (101), and a busbar (300) is installed in the I-shaped structure; A protection assembly (200) is installed in the frame (100), comprising a sealing plate (210) and a heat-sensitive element (220); a first groove (121) is provided on a side of the upper cover plate (120) close to the busbar (300); the sealing plate (210) is installed in the first groove (121) via an elastic member; and the heat-sensitive element (220) is clamped between the sealing plate (210) and the side connecting plate (110).

2. A bus duct according to claim 1, characterized in that: The side connecting plate (110) is in a Z shape, comprising a first horizontal portion (111), a bent portion (112) and a second horizontal portion (113); the ventilation hole (101) is provided on the first horizontal portion (111); a holder (102) adapted to the thermal sensitive element (220) is fixedly mounted on the opposite surfaces of the bent portion (112) and the sealing plate (210); and heat dissipation fins (103) are equidistantly mounted on the outer surface of the second horizontal portion (113).

3. A bus duct according to claim 2, characterized in that: The cover plate (120) has a cavity (122) inside, the cavity (122) is filled with coolant and is equipped with a pump body for pressurizing the coolant, and the second horizontal portion (113) has cooling grooves (104) equidistantly arranged inside along the extension direction, and the cooling grooves (104) are connected to the cavity (122).

4. A bus duct according to claim 3, characterized in that: Connectors (105) are fixedly mounted at both ends of the cooling groove (104); when the side connecting plate (110) and the cover plate (120) are connected, the connecting head (105) extends into the cavity (122).

5. A bus duct according to claim 4, characterized in that: The sealing plate (210) is provided with a through groove (211), and the number of the through grooves (211) is consistent with the number of the card seat (102). A push rod (212) is slidably installed in the through groove (211) through a telescopic member. One end of the push rod (212) passes through the card seat (102) and abuts against the thermal sensitive element (220). A first connecting pin (213) is fixedly installed at the other end of the push rod (212). A first plug block (214) is fixedly installed at one end of the first connecting pin (213) away from the push rod (212). A second installation groove (123) for accommodating the first plug block (214) is provided in the cover plate (120), and the second installation groove (123) is communicated with the cavity (122).

6. A bus duct according to claim 5, characterized in that: The telescopic member comprises a cylinder (215) and a movable rod (216); the cylinder (215) is fixedly mounted on the inner wall of the through groove (211); the cylinder (215) is filled with paraffin; one end of the movable rod (216) is movably mounted in the cylinder (215); and the other end of the movable rod (216) is fixedly connected to the push rod (212).

7. A bus duct according to claim 6, characterized in that: The thermal sensitive element (220) comprises a glass cover (221) and an expansion fluid filled in the glass cover (221), and one end of the glass cover (221) close to the sealing plate (210) has a second groove (201).

8. A bus duct according to claim 7, characterized in that: An exhaust groove (106) is provided in the bending portion (112), and a sealing plug (107) is installed in the exhaust groove (106) via an elastic member.

9. A bus duct according to claim 8, characterized in that: A second connecting pin (217) is fixedly mounted on the sealing plate (210), and a second plug block (218) is fixedly mounted on one end of the second connecting pin (217) away from the sealing plate (210). A third mounting groove (124) for accommodating the second plug block (218) is provided in the cover plate (120), and the third mounting groove (124) is communicated with the cavity (122).

10. A bus duct according to any one of claims 1 to 9, characterized in that: Connecting bars (310) are arranged at two ends of the busbar (300), and baffles (140) are arranged on four sides of the outer wall adjacent to the connecting bars (310), and the baffles (140) are used to seal the connection area between the two connecting bars (310).

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