A rare earth aluminum alloy copper busbar and switch cabinet

Abstract

The present invention discloses a rare earth aluminum alloy copper busbar and switch cabinet, comprising a body made of rare earth aluminum alloy, a connecting portion provided at at least one end of the body, the connecting portion having a first mounting hole, a conductive block provided with a second mounting hole corresponding to the first mounting hole, a plurality of first conductive posts connected to the conductive block along the circumferential direction of the second mounting hole, a plurality of second conductive posts connected to the conductive block in an area away from the second mounting hole, a pressing block provided at the upper end of the connecting portion, a clamping mechanism symmetrically provided on the left and right sides of the pressing block and the conductive block, the clamping mechanism compressing the pressing block, the connecting portion, and the conductive block. The first conductive post and the second conductive post are squeezed by force to deform the contact surface to form a tight fit. The deformation can squeeze out air on the one hand, preventing moisture in the air from forming an electrolyte that causes electrochemical corrosion between copper and aluminum, and can also reduce contact resistance and heat generation on the other hand.

Description

Technical Field

[0001] The invention relates to a conductive copper and aluminum connecting device, in particular to a rare earth aluminum alloy copper busbar and a switch cabinet. Background Art

[0002] According to Baidu Encyclopedia, electrical copper busbars are high-current conductive products suitable for high- and low-voltage electrical equipment, switch contacts, power distribution equipment, busbar ducts, and other electrical projects. The development of rare-earth aluminum alloy conductor materials, particularly their widespread application in power cables, has made it possible to replace electrical copper busbars with rare-earth aluminum alloy copper busbars. For example, the rare-earth high-iron aluminum alloy conductor material disclosed in patent CN102262913B can increase the long-term operating temperature of the aluminum alloy to 150°C, providing a higher current carrying capacity and thus making it suitable for use as an alternative to electrical copper busbars. However, in actual use, high-current circuit breakers use copper terminals. When the rare-earth aluminum alloy copper busbar is connected to the terminal via bolts, the force near the bolts is greater, while the force at the distal end is less. This results in air entering the contact surface between the rare-earth aluminum alloy copper busbar and the terminal during tightening. The moisture and salt in the air can easily cause electrochemical corrosion between the copper and aluminum over long periods of operation, reducing the reliability of the connection. Furthermore, when the long-term operating temperature of the rare-earth aluminum alloy material is increased to 150°C, creep occurs at high temperatures, reducing connection reliability. This unavoidable direct connection between copper and aluminum limits the widespread application of rare-earth aluminum alloy copper busbars. Given these drawbacks, it is necessary to design a rare-earth aluminum alloy copper busbar and switchgear. Summary of the Invention

[0003] The object of the present invention is to provide a rare earth aluminum alloy copper busbar and a switch cabinet, which can prevent air from entering the contact surface, avoid electrochemical corrosion, and improve the reliability of the connection.

[0004] To solve the above technical problems, the technical solution of the present invention is: a rare earth aluminum alloy copper busbar, comprising a body made of rare earth aluminum alloy, a connecting portion provided at at least one end of the body, the connecting portion having a first mounting hole, and a conductive block, the conductive block having a second mounting hole corresponding to the first mounting hole, a plurality of first conductive posts connected to the conductive block along the circumferential direction of the second mounting hole, a plurality of second conductive posts connected to the conductive block in an area away from the second mounting hole, the first and second conductive posts being shaped like frustums, the height of the second conductive posts being greater than the height of the first conductive posts, the body having first and second matching holes respectively matching the first and second conductive posts, a pressing block provided at the upper end of the connecting portion, the pressing block having third and fourth matching holes matching the first and second conductive posts, a clamping mechanism symmetrically provided on the left and right sides of the pressing block and the conductive block, the clamping mechanism pressing the pressing block, the connecting portion, and the conductive block.

[0005] The further improvements of the present invention are as follows:

[0006] Furthermore, the material of the conductive block is rare earth aluminum alloy.

[0007] Furthermore, the material of the pressing block is rare earth aluminum alloy.

[0008] Furthermore, first wedge blocks are provided on the left and right sides of the conductive block.

[0009] Furthermore, the pressing block is further provided with a first glue storage groove and a second glue storage groove. The first glue storage groove is opened on the top surface of the pressing block, and the first glue storage groove communicates with the third mating hole. The second glue storage groove is opened on the top surface of the pressing block, and the second glue storage groove communicates with the fourth mating hole. The first glue storage groove and the second glue storage groove are filled with silicone grease paste.

[0010] Furthermore, second wedge blocks are provided on the left and right sides of the pressing block.

[0011] Furthermore, a silicone rubber pad is provided on the top of the pressing block. A number of first protrusions and a number of second protrusions that are respectively matched with the first glue storage groove and the second glue storage groove are provided on the bottom of the silicone rubber pad. The first protrusions and the second protrusions extend into the first glue storage groove and the second glue storage groove to extrude the silicone grease paste.

[0012] Furthermore, the clamping mechanism includes a frame body made of rare earth aluminum alloy. The frame body is in a "U" shape, and wedge-shaped surfaces that are respectively matched with the first wedge block and the second wedge block are provided on the upper and lower surfaces of its opening. By pushing the frame body to slide along the first wedge block and the second wedge block, the pressing block, the connecting part, and the conductive block are mutually close until they are pressed tightly. A groove is provided on the other side of the frame body, and a cover plate is provided outside the groove. A liquid inlet pipe and a liquid outlet pipe are provided at the bottom of the frame body, and the cavities of the liquid inlet pipe and the liquid outlet pipe communicate with the groove respectively.

[0013] A switch cabinet includes a cabinet body. A circuit breaker is installed in the cabinet body, and the circuit breaker is connected with a rare earth aluminum alloy copper bar.

[0014] Furthermore, a circulation mechanism is further provided in the cabinet body. The circulation mechanism includes an oil tank. Two water pumps are fixed on the top of the oil tank. The inlets of the water pumps are connected with the oil tank through hoses. The oil tank is provided with a distribution block. A number of oil holes are provided on the distribution block, and the oil holes are connected with the clamping mechanism through hoses. Two high-pressure oil channels are provided on the distribution block, and the high-pressure oil channels are connected with the outlets of the water pumps through hoses. The water pumps pump the oil liquid out of the oil tank and pump it into the high-pressure oil channels, and then input it into the clamping mechanism through hoses. A low-pressure oil channel is provided on the distribution block, and the low-pressure oil channel receives the oil liquid flowing back from the clamping mechanism and inputs it into the oil tank.

[0015] The present invention has the following beneficial effects:

[0016] 1. The contact surfaces of the first and second conductive posts are squeezed by force, causing deformation to form a tight fit. This deformation is caused by two factors: the deformation of the tops of the first and second conductive posts, and the deformation of the contact surfaces of the circuit breaker terminals. This deformation not only squeezes out air, preventing moisture in the air from forming electrolytes that can cause electrochemical corrosion between copper and aluminum, but also reduces contact resistance and heat generation.

[0017] 2. The frustum-shaped first and second conductive pillars have a large contact area with the conductive block, the connecting portion, and the pressing block, effectively and quickly transferring heat;

[0018] 3. The silicone pad and the pressure block work together to squeeze high-insulation silicone grease into the cavity formed by the contact surface between the silicone pad, the first / second conductive post, and the circuit breaker terminal, thereby preventing air ingress and electrochemical corrosion, thereby improving connection reliability.

[0019] 4. The clamping mechanism can be used to pass current and circulate oil for cooling through the grooves provided therein, thereby reducing the temperature of the first conductive column, the second conductive column and the connection terminal of the circuit breaker, further improving the reliability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram showing the rare earth aluminum alloy copper busbar of the present invention

[0021] Figure 2 Three-dimensional diagram showing the conductive block of the present invention

[0022] Figure 3 Three-dimensional diagram showing the compact of the present invention

[0023] Figure 4 A three-dimensional diagram showing the clamping mechanism of the present invention

[0024] Figure 5 A three-dimensional diagram showing the silicone pad of the present invention

[0025] Figure 6 A three-dimensional diagram showing the switch cabinet of the present invention

[0026] Figure 7 Show the present invention Figure 6 Enlarged view of the circle

[0027] Figure 8 Three-dimensional diagram showing the distribution block of the present invention

[0028] In the figure: body 1, connecting portion 101, first mounting hole 102, first matching hole 103, second matching hole 104, conductive block 2, second mounting hole 201, first wedge block 202, first conductive column 3, second conductive column 4, pressing block 5, third matching hole 501, fourth matching hole 502, first glue storage tank 503, second glue storage tank 504, second wedge block 505, third mounting hole 506, clamping mechanism 6, frame 60 1. Wedge-shaped surface 602, groove 603, cover plate 604, liquid inlet pipe 605, liquid outlet pipe 606, silicone pad 7, first protrusion 701, second protrusion 702, fifth matching hole 703, fourth mounting hole 704, cabinet 8, circuit breaker 9, circulation mechanism 10, oil tank 1001, water pump 1002, distribution block 1003, oil hole 1004, high-pressure oil channel 1005, low-pressure oil channel 1006, temperature sensor 1007. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, a rare earth aluminum alloy copper busbar includes a body 1 made of rare earth aluminum alloy, wherein at least one end of the body 1 is provided with a connecting portion 101, wherein the connecting portion 101 is provided with a first mounting hole 102, and further includes a conductive block 2, wherein the conductive block 2 is provided with a second mounting hole 201 corresponding to the first mounting hole 101, wherein a plurality of first conductive posts 3 are connected to the conductive block 2 along the circumferential direction of the second mounting hole 201, and a plurality of second conductive posts 4 are connected to the conductive block 2 in an area away from the second mounting hole 201, wherein the first conductive posts 3 and the second conductive posts 4 are in the shape of a frustum, and the height of the second conductive posts 4 is 1 / 4. The height is greater than the height of the first conductive column 3. The main body 1 is respectively provided with a first matching hole 103 and a second matching hole 104 that match the first conductive column 3 and the second conductive column 4. The upper end of the connecting portion 101 is provided with a pressing block 5. The pressing block 5 is provided with a third matching hole 501 and a fourth matching hole 502 that match the first conductive column 3 and the second conductive column 4. The left and right sides of the pressing block 5 and the conductive block 2 are symmetrically provided with a clamping mechanism 6. The clamping mechanism 6 presses the pressing block 5, the connecting portion 101, and the conductive block 2. The conductive block 2 is made of rare earth aluminum alloy, and the pressing block 5 is also made of rare earth aluminum alloy.

[0030] In this embodiment, when the clamping mechanism 6 presses the pressing block 5, the connecting portion 101, and the conductive block 2, the first conductive column 3 passes through the first matching hole 103 and the third matching hole 501 respectively, and the second conductive column 4 passes through the second matching hole 104 and the fourth matching hole 502 respectively. Due to the pressing effect of the clamping mechanism 6 on the pressing block 5 and the conductive block 2, the frustum-shaped first conductive column 3 is completely fitted with the inner surfaces of the first matching hole 103 and the third matching hole 501, and the frustum-shaped second conductive column 4 is completely fitted with the inner surfaces of the second matching hole 104 and the fourth matching hole 502 respectively. On the one hand, the contact resistance is reduced, and on the other hand, the close contact can quickly dissipate the heat from the first conductive column 3 and the second conductive column 4.

[0031] In this embodiment, Figure 6 As shown, bolts are passed through the first mounting hole 102, the second mounting hole 201, the third mounting hole 506, and the terminal of the circuit breaker 9. When the bolts are tightened, the second conductive posts 4 in the area away from the second mounting hole 201 first contact the terminal of the circuit breaker 9. As the tightening degree increases, the first conductive posts 3 around the second mounting hole 201 also contact the terminal of the circuit breaker 9 until the set bolt torque is reached. During this process, the first and second conductive posts 3 and 4 are squeezed and deformed, forming a tight fit. This deformation is composed of two parts: one is the deformation of the tops of the first and second conductive posts 3 and 4, and the other is the deformation of the contact surface of the terminal of the circuit breaker 9. This deformation not only displaces air, preventing moisture in the air from forming an electrolyte that causes electrochemical corrosion between copper and aluminum, but also reduces contact resistance. Temperature rise experiments have found that the optimal effect is achieved when the height of the second conductive posts 4 is 0.2-0.3 mm greater than the height of the first conductive posts 3.

[0032] Of course, the first conductive pillar 3 and the second conductive pillar 4 can be connected to the conductive block 2 by screw threads, or by riveting, or can be directly processed on the conductive block 2 using a machining center.

[0033] In other embodiments, in order to further prevent electrochemical corrosion between the first conductive pillar 3 , the second conductive pillar 4 and the terminal of the circuit breaker 9 , the first conductive pillar 3 , the second conductive pillar 4 are electroplated with tin, and the plating thickness is 8-10 μm.

[0034] In other embodiments, to achieve better connection effects, the tops of the first conductive pillars 3 and the second conductive pillars 4 are arc-shaped, with the middle of the arc being higher and the surroundings being lower, and the distance between the highest point in the middle of the arc and the edge is 0.2 mm.

[0035] In this embodiment, during actual use, since the shapes of the first conductive column 3 and the second conductive column 4 are frustum cones, with a large bottom area and a small top area, the large bottom area can significantly increase the contact area and improve the overcurrent capacity. By increasing the number of the first conductive column 3 and the second conductive column 4, the overcurrent capacity at the top can be improved. At the same time, since the conductive block 2, the connecting portion 101, the pressing block 5, and the main body portion of the clamping mechanism 6, i.e., the frame 601, are all made of rare earth aluminum alloy, they can all conduct current and are closely fitted to each other, further improving the overcurrent capacity. Moreover, the frustum cone-shaped first conductive column 3 and second conductive column 4 have a large contact area with the conductive block 2, the connecting portion 101, and the pressing block 5, effectively transferring heat quickly, so as to dissipate heat through the clamping mechanism 6, further ensuring the reliability of the work.

[0036] As Figure 2 , Figure 5 , Figure 6 shown, first wedge blocks 202 are provided on the left and right sides of the conductive block 2, second wedge blocks 505 are provided on the left and right sides of the pressing block 5, the clamping mechanism 6 includes a frame 601 made of rare earth aluminum alloy, the frame 601 is in a "C" shape, and wedge surfaces 602 that cooperate with the first wedge blocks 202 and the second wedge blocks 505 are respectively provided on the upper and lower surfaces within the opening. By pushing the frame 602 to slide along the first wedge blocks 202 and the second wedge blocks 505, the pressing block 5, the connecting portion 101, and the conductive block 2 are moved closer to each other until they are pressed tightly. A groove 603 is provided on the other side of the frame 601, a cover plate 604 is provided outside the groove 603, and a liquid inlet pipe 605 and a liquid outlet pipe 606 are provided at the bottom of the frame 601. The cavities of the liquid inlet pipe 605 and the liquid outlet pipe 606 communicate with the groove 603 respectively.

[0037] In this embodiment, during assembly, the first conductive columns 3 on the conductive block 2 respectively pass through the first mating holes 103 on the connecting portion 101 and the third mating holes 501 on the pressing block 5, and the second conductive columns 4 respectively pass through the second mating holes 104 on the connecting portion 101 and the fourth mating holes 502 on the pressing block 5. The upper and lower two wedge surfaces 602 within the frame 601 are respectively brought into contact with the first wedge blocks 202 on the conductive block 2 and the second wedge blocks 505 on the pressing block 5, and the frame 601 is pushed to move, so that the conductive block 2 and the pressing block 5 move closer to each other. By setting the moving distance of the frame 601, the pressure between the frame 601 and the conductive block 2 and the pressing block 5 can be adjusted, thereby adjusting the tightness between the first conductive column 3 and the first mating hole 103, the third mating hole 501, the second conductive column 4 and the second mating hole 104, the fourth mating hole 502, so as to reduce the contact resistance and improve the heat conduction efficiency.

[0038] In this embodiment, in order to further improve the heat dissipation efficiency, the cavity formed between the groove 603 and the cover plate 604 is used as an oil storage chamber, and insulating oil is input through the liquid inlet pipe 605 and output through the liquid outlet pipe 606, thereby achieving efficient heat dissipation, avoiding loosening of the connection parts caused by high-temperature creep, and improving the reliability of the connection.

[0039] like Figure 3 、 Figure 5 As shown, the pressing block is further provided with a first glue storage tank 503 and a second glue storage tank 504. The first glue storage tank 503 is opened on the top surface of the pressing block 5, and the first glue storage tank 503 is connected to the third matching hole 501. The second glue storage tank 504 is opened on the top surface of the pressing block 5, and the second glue storage tank 504 is connected to the fourth matching hole 502. The first glue storage tank 503 and the second glue storage tank 504 are filled with highly insulating silicone grease. A silicone pad 7 is provided on the top of the pressing block 5, and a plurality of first protrusions 701 and a plurality of second protrusions 702 are respectively provided on the bottom of the silicone pad 7 for matching with the first glue storage tank 503 and the second glue storage tank 504. The first protrusions 701 and the second protrusions 702 extend into the first glue storage tank 503 and the second glue storage tank 504 to squeeze out the silicone grease.

[0040] In order to adapt to installation, a fourth mounting hole 704 corresponding to the first mounting hole 102 is opened on the silicone pad 7, and a fifth matching hole 703 is opened on the silicone pad 7. The diameter of the fifth matching hole 703 is larger than the diameter of the first conductive column 3 and the second conductive column 4.

[0041] In this embodiment, the silicone pad 7 is placed on the pressing block 5, and the first protrusion 701 and the second protrusion 702 correspond to the first glue storage groove 503 and the second glue storage groove 504, respectively. When the bolts are tightened for installation, the first protrusion 701 and the second protrusion 702 extend into the first glue storage groove 503 and the second glue storage groove 504, squeezing out the highly insulating silicone grease. Because the first and second conductive pillars 3 and 4 are in close contact with the pressing block 5 due to the action of the clamping mechanism 6, the silicone grease can only move upward along the first and second conductive pillars 3 and 4. At the same time, due to the squeezing effect between the first and second conductive pillars 3 and 4 and the terminal of the circuit breaker 9, the silicone grease cannot enter the contact surface between the first and second conductive pillars 3 and 4 and the terminal of the circuit breaker 9. Instead, the silicone grease can only accumulate in the space formed by the fifth mating hole 703, the first and second conductive pillars 3 and 4, and the terminal of the circuit breaker 9, thereby isolating air and dust from entering the contact surface and further preventing electrochemical corrosion between copper and aluminum.

[0042] Among them, the first protrusion 701 and the second protrusion 702, which are independently arranged in multiple pieces, respectively cooperate with the first glue storage tank 503 and the second glue storage tank 504. By adjusting the number of the first protrusion 701 and the second protrusion 702, the amount of silicone grease extruded can be controlled to prevent excessive accumulation and waste.

[0043] In order to further improve the reliability of installation, a high-hardness silicone pad 7 with a Shore hardness of 60A-70A is selected. Its compression deformation is small and it is arranged between the pressure block 5 and the terminal of the circuit breaker 9. The gap caused by the slight loosening of the bolt is compensated by deformation, thereby effectively improving the installation reliability. At the same time, the deformation of the silicone pad 7 seals the contact surface between the silicone pad 7 and the terminal of the circuit breaker 9 to prevent air from entering, further avoiding electrochemical corrosion between copper and aluminum.

[0044] like Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 As shown, a switch cabinet includes a cabinet body 8, a circuit breaker 9 is installed in the cabinet body 8, and the circuit breaker 9 is connected to a rare earth aluminum alloy copper busbar. The cabinet body 8 is also provided with a circulation mechanism 10, and the circulation mechanism 10 includes an oil tank 1001. Two water pumps 1002 are fixed on the top of the oil tank 1001. The inlet of the water pump 1002 is connected to the oil tank 1001 through a hose. The oil tank 1001 is installed with a distribution block 1003. The distribution block 1003 is provided with a plurality of oil holes 1004. The oil holes 1004 is connected to the clamping mechanism 6 through a hose. Two high-pressure oil passages 1005 are provided on the distribution block 1003. The high-pressure oil passages 1005 are connected to the outlet of the water pump 1002 through a hose. The water pump 1002 draws oil from the oil tank 1001 and pumps it into the high-pressure oil passages 1005, and inputs it to the clamping mechanism 6 through the hose. A low-pressure oil passage 1006 is provided on the distribution block 1003. The low-pressure oil passage 1006 receives the oil flowing back from the clamping mechanism 6 and inputs it into the oil tank 1001.

[0045] In this embodiment, the number of rare earth aluminum alloy copper bars is 6, which are respectively connected to the 6 terminal blocks of the circuit breaker 9 by bolt groups. In order to adapt to this installation method, the number of oil holes on the distribution block 1003 is 12, of which 6 oil holes 1004 are connected to the liquid outlet pipe 606 in the clamping mechanism 6 through a hose, and are used to receive the oil flowing back from the groove 603 and input it into the oil tank 1001 through 3 low-pressure oil passages 1006 that are not connected to each other. The remaining 6 oil holes 1004 are connected to the liquid inlet pipe 605 in the clamping mechanism 6 through a hose. The water pump 1002 draws the oil from the oil tank 1001 and pumps it into the high-pressure oil passage 1005. The pressure in the high-pressure oil passage 1005 increases the oil. The liquid is input into the groove 603 through the liquid inlet pipe 605. Since the two water pumps 1002 correspond to the two high-pressure oil passages 1005 respectively, the number of oil holes 1004 connected to the high-pressure oil passages 1005 can be designed according to actual needs. In this embodiment, three oil holes 1004 are connected to one high-pressure oil passage 1005, thereby increasing the flow rate of a single oil hole 1004 by reducing the load of a single water pump 1002 (the number of oil holes 1004 connected to the liquid inlet pipe 605), thereby improving the heat dissipation efficiency. At the same time, the two separately arranged high-pressure oil passages 1005 and the three independent low-pressure oil passages 1006 can quickly perform fault screening, thereby quickly determining the oil circuit where the fault occurs and improving maintenance efficiency.

[0046] During circulation operation, since the circuit breaker 9 is located in the middle of the cabinet 8, the water pump 1002 draws oil from the oil tank 1001 and pumps it into the high-pressure oil channel 1005. The pressure in the high-pressure oil channel 1005 increases, and the oil is input into the groove 603 through the liquid inlet pipe 605. Since the pressure in the groove 603 increases with the increase of the oil entering, under the action of pressure and gravity, the oil in the groove 603 flows into the oil hole 1004 through the liquid outlet pipe 606 and is then input into the oil tank 1001 through the low-pressure oil channel 1006. This process is repeated to realize the circulation of the oil, thereby achieving efficient heat dissipation.

[0047] In order to further improve the heat dissipation effect, a temperature sensor 1007 is provided on the oil tank 1001 for detecting the temperature of the insulating oil in the oil tank 1001 in real time, thereby adjusting the rotation speed of the water pump 1002 for temperature control.

[0048] The working principle of the present invention is as follows: first, the conductive block 2, the connecting portion 101, and the pressing block 5 are compressed together by the clamping mechanism 6, and then the rare earth aluminum alloy copper busbar is connected to the terminal of the circuit breaker 9 by bolts. During this process, the first conductive column 3 and the second conductive column 4 are squeezed by force, causing the contact surface with the terminal of the circuit breaker 9 to deform and form a tight fit. Due to the different heights of the first conductive column 3 and the second conductive column 4, the first conductive column 3 near the bolt is subjected to greater force and lower height, while the second conductive column 4 away from the bolt is subjected to less force and higher height. As a result, the second conductive column 4 first contacts the terminal of the circuit breaker 9 and deforms, and the first conductive column 3 contacts the terminal of the circuit breaker 9 and deforms later. This matches the working conditions of high pressure near the bolt and avoids poor contact at the far end. At the same time, through the interaction between the silicone pad 7 and the pressing block 5, the highly insulating silicone grease is squeezed into the cavity formed by the contact surface between the silicone pad 7, the first conductive column 3 / the second conductive column 4, and the terminal of the circuit breaker 9, thereby preventing air from entering, preventing electrochemical corrosion, and improving the reliability of the connection. To quickly dissipate heat and improve reliability, the water pump 1002 within the circulation mechanism 10 draws insulating oil from the oil tank 1001 and pumps it into the high-pressure oil passage 1005. The increased pressure within the high-pressure oil passage 1005 causes the oil to be fed into the groove 603 via the liquid inlet pipe 605. Because the pressure within the groove 603 increases as the amount of oil entering increases, under the effects of pressure and gravity, the oil within the groove 603 flows through the liquid outlet pipe 606 into the oil hole 1004 and then into the oil tank 1001 via the low-pressure oil passage 1006, thus achieving circulation of the insulating oil. This reduces the temperature of the first and second conductive posts and the connection terminals of the circuit breaker, prevents creep caused by high temperatures, and further improves operational reliability.

[0049] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by ordinary technicians in this field based on the above-mentioned concept without creative work are all within the scope of protection of the present invention.

Claims

1. A rare earth aluminum alloy copper busbar, comprising a body made of rare earth aluminum alloy, wherein at least one end of the body is provided with a connecting portion, wherein the connecting portion is provided with a first mounting hole, characterized in that It further includes a conductive block. The conductive block is provided with a second mounting hole corresponding to the first mounting hole. A number of first conductive columns are connected along the circumferential direction of the second mounting hole on the conductive block. A number of second conductive columns are connected in the area of the conductive block far from the second mounting hole. The shapes of the first conductive columns and the second conductive columns are frustum cones. The height of the second conductive columns is greater than that of the first conductive columns. The body is respectively provided with a first mating hole and a second mating hole that cooperate with the first conductive columns and the second conductive columns. A pressing block is provided at the upper end of the connecting portion. The pressing block is provided with a third mating hole and a fourth mating hole that cooperate with the first conductive columns and the second conductive columns. Clamping mechanisms are symmetrically arranged on the left and right sides of the pressing block and the conductive block. The clamping mechanisms press the pressing block, the connecting portion, and the conductive block tightly. The pressing block further has a first glue storage groove and a second glue storage groove. The first glue storage groove is opened on the top surface of the pressing block and connects the third mating hole. The second glue storage groove is opened on the top surface of the pressing block and connects the fourth mating hole. The first glue storage groove and the second glue storage groove are filled with silicone grease paste.

2. The rare earth aluminum alloy copper busbar according to claim 1, characterized in that The material of the conductive block is rare earth aluminum alloy.

3. The rare earth aluminum alloy copper busbar according to claim 2, characterized in that The material of the pressing block is rare earth aluminum alloy.

4. The rare earth aluminum alloy copper busbar according to claim 3, characterized in that First wedge-shaped blocks are arranged on the left and right sides of the conductive block.

5. The rare earth aluminum alloy copper busbar according to claim 4, characterized in that Second wedge-shaped blocks are arranged on the left and right sides of the pressing block.

6. The rare earth aluminum alloy copper busbar according to claim 1, characterized in that A silicone rubber pad is provided on the top of the pressing block. A number of first protrusions and a number of second protrusions that cooperate with the first glue storage groove and the second glue storage groove are respectively provided at the bottom of the silicone rubber pad. The first protrusions and the second protrusions extend into the first glue storage groove and the second glue storage groove to extrude the silicone grease paste.

7. The rare earth aluminum alloy copper busbar according to claim 5, characterized in that The clamping mechanism includes a frame body made of rare earth aluminum alloy. The frame body is in an "L" shape. Wedge-shaped surfaces that cooperate with the first wedge-shaped blocks and the second wedge-shaped blocks are respectively provided on the upper and lower surfaces of its opening. Push the frame body to slide along the first wedge-shaped blocks and the second wedge-shaped blocks, so that the pressing block, the connecting portion, and the conductive block approach each other until they are tightly pressed. A groove is provided on the other side of the frame body. A cover plate is provided outside the groove. A liquid inlet pipe and a liquid outlet pipe are provided at the bottom of the frame body. The cavities of the liquid inlet pipe and the liquid outlet pipe communicate with the groove respectively.

8. A switch cabinet comprising a cabinet body, a circuit breaker installed in the cabinet body, and a rare earth aluminum alloy copper busbar connected to the circuit breaker, characterized in that The rare earth aluminum alloy copper row is the rare earth aluminum alloy copper row according to any one of claims 1 to 7.

9. The switch cabinet according to claim 8, characterized in that A circulation mechanism is further provided in the cabinet. The circulation mechanism includes an oil tank filled with insulating oil. Two water pumps are fixed on the top of the oil tank. The inlets of the water pumps are connected to the oil tank through hoses. A distribution block is installed on the oil tank. A number of oil holes are provided on the distribution block. The oil holes are connected to the clamping mechanism through hoses. Two high-pressure oil channels are provided on the distribution block. The high-pressure oil channels are connected to the outlets of the water pumps through hoses. The water pumps draw the oil liquid from the oil tank and pump it into the high-pressure oil channels, and then input it into the clamping mechanism through hoses. A low-pressure oil channel is provided on the distribution block. The low-pressure oil channel receives the oil liquid flowing back from the clamping mechanism and inputs it into the oil tank.

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