A primary and secondary integrated pole-mounted circuit breaker

Abstract

The present application discloses a primary and secondary integrated pole-mounted circuit breaker, which relates to the technical field of electrical equipment, and includes a circuit breaker body, a plurality of sealed poles connected to the circuit breaker, the sealed poles include an incoming line side and an outgoing line side, the incoming line side is connected with a wiring unit, the wiring unit includes a wiring row, a wiring bolt movably arranged in the wiring row and threadedly connected to the incoming line side, and a wiring nut threadedly connected to the wiring bolt, the wiring nut is arranged between the wiring row and the incoming line side; the wiring row includes a wiring part and a clamping part connected to the wiring part, the clamping part is sleeved on the wiring bolt rod, the end of the clamping part away from the wiring part is provided with a crack and connected with a fastener, and the outside of the clamping part, the wiring bolt and the wiring nut are jointly covered with a protective cover. The wiring stability of the incoming line side of the present application is high, which effectively reduces the possibility of power accidents, is stable and reliable, and is suitable for use in places with harsh environments.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a primary-secondary integrated pole-mounted circuit breaker. Background Art

[0002] The integrated primary and secondary pole-mounted circuit breaker refers to an intelligent power equipment that integrates primary equipment (such as high-voltage switchgear) and secondary equipment (such as control and protection equipment). It has the characteristics of high reliability, integration and intelligence level, can meet the automation control and fault handling of distribution networks, and has been widely used in power systems.

[0003] In the related technology, the integrated primary and secondary pole-mounted circuit breaker includes a circuit breaker housing, a sealed pole, a feeder terminal, a current transformer, a voltage transformer, a control unit, a spring operating mechanism and other components. The sealed pole is encapsulated with a vacuum arc chamber and a conductive terminal, and the conductive terminal is electrically connected to the cable through a wiring unit.

[0004] In actual application, since the primary and secondary integrated pole-mounted circuit breakers are mainly used in outdoor places and are subject to various external interferences, the connection between the wiring unit and the conductive terminal is prone to abnormal problems such as corrosion, cracking, loosening, etc., which in turn affects the stability of the wiring and poses a safety hazard, especially on the incoming line side. Summary of the invention

[0005] In order to improve the wiring stability on the incoming line side, the present application provides a primary and secondary integrated pole-mounted circuit breaker.

[0006] The present application provides a primary and secondary integrated pole-mounted circuit breaker adopts the following technical solution:

[0007] A primary and secondary integrated pole-mounted circuit breaker, comprising a circuit breaker body, a plurality of sealed poles connected to the circuit breaker, the sealed poles comprising an incoming line side and an outgoing line side, the incoming line side being connected to a wiring unit, the wiring unit comprising a wiring bar, a wiring bolt movably arranged in the wiring bar and threadedly connected to the incoming line side, and a wiring nut threadedly connected to the wiring bolt, the wiring nut being arranged between the wiring bar and the incoming line side;

[0008] The terminal block includes a terminal portion and a clamping portion connected to the terminal portion, the clamping portion is sleeved on the terminal bolt rod, one end of the clamping portion away from the terminal portion is provided with a crack and is connected to a fastener, and the outer sides of the clamping portion, the terminal bolt and the terminal nut are jointly covered with a protective cover.

[0009] By adopting the above technical solution, firstly, the connection bolts, connection nuts and fasteners can improve the connection reliability between the wiring unit and the incoming line side, so that the wiring unit is not prone to loosening; secondly, the protective cover fully covers the connection between the wiring unit and the incoming line side, so that the connection is not easily corroded by objects such as rainwater and bird droppings, and thus the connection between the wiring unit and the incoming line side is not prone to corrosion and cracking. Therefore, the wiring stability of the incoming line side of the present application is high, which effectively reduces the possibility of power accidents, is stable and reliable, and is suitable for use in places with harsh environments.

[0010] Optionally, the protective sleeve includes an integrally formed sleeve body and a raised portion, the sleeve body is used to accommodate the clamping portion and the wiring nut, a through hole for the wiring portion to pass through is provided on one side of the sleeve body, and the raised portion is used to accommodate the head of the wiring bolt.

[0011] By adopting the above technical solution, the protective cover is integrally formed, which is convenient to manufacture and has low cost. However, the sealing performance is insufficient, and if the protective cover is aged and damaged during use, it is not easy to replace.

[0012] Optionally, the protective sheath includes a first sheath and a second sheath, the first sheath and the second sheath are detachably connected, and an accommodating cavity is formed between the first sheath and the second sheath.

[0013] By adopting the above technical solution, the protective cover can be made by injection molding, with high dimensional accuracy, can ensure sealing, and is easy to disassemble and replace. However, the production cost is increased accordingly.

[0014] Optionally, a protrusion is connected to a side of the first sheath close to the second sheath, and the second sheath is provided with a slot for the protrusion to be inserted into.

[0015] By adopting the above technical solution, the connection tightness between the first sheath and the second sheath is improved, so that moisture is not easy to enter from the seam between the first sheath and the second sheath.

[0016] Optionally, the outer wall of the upper end of the convex edge is connected with a barb, and the slot is connected with a slot for inserting the barb.

[0017] By adopting the above technical solution, the connection tightness between the first sheath and the second sheath is further improved, and by pressing the upper end of the first sheath during disassembly, the barb can be disengaged from the slot, thereby facilitating the removal of the protective sheath.

[0018] Optionally, a sealing gasket is clamped between the first sheath and the second sheath.

[0019] By adopting the above technical solution, the sealing between the first sheath and the second sheath is further improved.

[0020] Optionally, the lower ends of the first and second sheaths are connected to sealing ridges, the inlet side is provided with an annular groove for inserting the sealing ridge, a water accumulation groove is provided on the upper side of the sealing ridge, a gap is provided between the inner wall of the annular groove and the sealing ridge, a sealing ring is provided between the sealing ridge and the bottom wall of the annular groove, and the outer side of the sealing ridge is connected to a sealing edge that presses against the upper surface of the inlet side.

[0021] By adopting the above technical solution, when it rains, rainwater enters the water trough, increasing the interaction force between the protective cover and the incoming line side, improving the sealing between the protective cover and the incoming line side, making it difficult for moisture to penetrate between the protective cover and the incoming line side, and further preventing the terminal bolts, terminal nuts and fasteners from aging and corrosion due to moisture.

[0022] Optionally, the interior of the protective sheath is filled with power compound grease, and the first sheath and / or the second sheath is provided with a grease injection port, and the grease injection port is plugged with a container for storing the power compound grease.

[0023] By adopting the above technical solution, relying on the high sealing performance of the protective sleeve and the fit of the shape of the accommodating cavity, the contact resistance of the connection is reduced by injecting electrical composite grease into the accommodating cavity. It also has anti-oxidation and anti-corrosion protective effects, which can prevent abnormal heating and burning of the metal conductor connection, thereby improving the long-term operation reliability of power equipment and transmission lines.

[0024] Optionally, the container includes a bottle body, a bottle mouth connected to the bottle body, and a squeeze cover threadedly connected to the inner side of the bottle body, the bottle mouth is plugged into the grease injection port, and the squeeze cover is connected to a knob.

[0025] By adopting the above technical solution, the knob is regularly turned so that the extrusion cover moves close to the bottle mouth, and the electric composite grease is quickly pressed into the containing cavity.

[0026] Optionally, the wiring portion is arranged to be inclined upward in a direction away from the clamping portion.

[0027] By adopting the above technical solution, installation and maintenance are facilitated.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. Through the arrangement of wiring bolts, wiring nuts, fasteners and protective covers, the wiring stability of the incoming line side of the present application is high, which effectively reduces the possibility of power accidents, is stable and reliable, and is suitable for use in places with harsh environments.

[0030] 2. The protective sleeve of the present application provides two types for users to choose from. The one-piece molded rubber sleeve has the advantages of easy production and manufacturing and low cost, and the detachable injection molded part has the advantages of easy replacement and high sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view schematic diagram of a primary and secondary integrated pole-mounted circuit breaker of Example 1 of the present application;

[0032] Figure 2 It is a side view schematic diagram of a primary and secondary integrated pole-mounted circuit breaker of Example 1 of the present application;

[0033] Figure 3 is a structural schematic diagram of a wiring unit according to Embodiment 1 of the present application;

[0034] Figure 4 It is a schematic structural diagram of a protective cover, a wiring unit and a container in Embodiment 2 of the present application;

[0035] Figure 5 is a cross-sectional schematic diagram of a protective cover and a wiring unit according to a second embodiment of the present application;

[0036] Figure 6 yes Figure 5 A magnified schematic diagram of the middle A area;

[0037] Figure 7 It is a schematic diagram of the structure of the protective cover, container and terminal block of the second embodiment of the present application.

[0038] Explanation of the reference numerals: 1. circuit breaker body; 2. sealed pole; 21. incoming line side; 211. annular groove; 22. outgoing line side; 3. wiring unit; 31. wiring row; 311. wiring part; 312. clamping part; 3121. slit; 32. wiring bolt; 33. wiring nut; 34. fastener; 4. protective sleeve; 41. sleeve body; 411. through hole; 42. raised part; 43. first sleeve; 431. raised edge; 432. barb; 44. second sleeve; 441. slot; 442. card slot; 45. sealing convex strip; 451. water accumulation groove; 46. sealing ring; 47. sealing gasket; 48. sealing edge; 49. grease injection port; 5. container; 51. bottle body; 52. bottle mouth; 53. extrusion cover; 531. knob; 6. accommodating chamber. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-7 This application is described in further detail.

[0040] The embodiment of the present application discloses a primary-secondary integrated pole-mounted circuit breaker.

[0041] Embodiment 1:

[0042] Reference Figure 1 , Figure 2The primary and secondary integrated pole-mounted circuit breaker includes a circuit breaker body 1 and three sets of sealed poles 2 fixedly connected to the circuit breaker. The specific structures of the circuit breaker body 1 and the sealed poles 2 are prior art and will not be described here. The sealed pole 2 includes an incoming line side 21 and an outgoing line side 22. The top of the incoming line side 21 is connected with a wiring unit 3 to achieve a stable electrical connection.

[0043] Reference Figure 2 , Figure 3 The wiring unit 3 includes a wiring row 31, and the wiring row 31 includes an integrally formed wiring portion 311 and a clamping portion 312. The wiring portion 311 is arranged upwardly and obliquely in a direction away from the clamping portion 312, and two connection holes are provided through the wiring portion 311. A wiring bolt 32 is vertically movably penetrated in the middle of the clamping portion 312, and the lower end of the wiring bolt 32 is threadedly connected to the conductive terminal of the incoming line side 21. A wiring nut 33 is clamped between the clamping portion 312 and the incoming line side 21, and the wiring nut 33 is threadedly connected to the wiring bolt 32. The wiring nut 33 is a hexagonal nut with a washer, which serves to increase the electrical connection area.

[0044] Reference Figure 2 , Figure 3 , a crack 3121 is provided at one end of the clamping part 312 away from the wiring part 311, and the crack 3121 extends to the wiring bolt 32, and a fastener 34 is provided through the end of the clamping part 312 away from the wiring part 311 in the horizontal direction. In the embodiment of the present application, the fastener 34 is a bolt and nut combination, and both ends of the clamping part 312 are provided with through holes for the fastener 34 to pass through; in other embodiments, the fastener 34 can also be a single bolt, and a through hole for the bolt to pass through is provided at one end of the clamping part 312, and a threaded hole for the bolt to be screwed is provided at the other end. The clamping part 312 is subjected to an extrusion force by the fastener 34, so that the wiring row 31 has a good holding effect on the wiring bolt 32, thereby preventing the wiring unit 3 from being easily loosened.

[0045] Reference Figure 1 , Figure 2 The outside of the clamping portion 312, the wiring bolt 32 and the wiring nut 33 are jointly covered with a protective cover 4, and the protective cover 4 fully covers the connection between the wiring unit 3 and the incoming line side 21, making it difficult to be eroded by objects such as rainwater and bird droppings, thereby making it difficult for the connection between the wiring unit 3 and the incoming line side 21 to be corroded or cracked.

[0046] The protective sleeve 4 is made of rubber and includes an integrally formed sleeve body 41 and a raised portion 42. The sleeve body 41 is in a square box shape and is used to accommodate the clamping portion 312 and the wiring nut 33. A through hole 411 is provided on one side of the sleeve body 41 for the wiring portion 311 to pass through. The raised portion 42 is located at the top of the sleeve body 41 and is used to accommodate the head of the wiring bolt 32.

[0047] The protective cover 4 is integrally formed, easy to manufacture and low in cost. When installing, first pass the wiring part 311 through the through hole 411, insert along the wiring part 311, and then insert the wiring bolt 32 into the protrusion 42 to complete the installation. However, the sealing performance is insufficient and it is not easy to replace, so it is suitable for places with relatively suitable application environment conditions.

[0048] Embodiment 2:

[0049] The difference from the first embodiment is that the structure of the protective cover 4 is different and a container 5 is additionally provided.

[0050] Reference Figure 4 , Figure 5 The protective cover 4 is made of plastic and includes a first cover 43 and a second cover 44. A receiving chamber 6 is formed between the first cover 43 and the second cover 44 to receive the clamping portion 312, the wiring bolt 32 and the wiring nut 33. Since the protective cover 4 is injection molded, the dimensional accuracy is controllable and the installation is convenient. Therefore, the shape of the receiving chamber 6 can be adapted to the clamping portion 312, the wiring bolt 32 and the wiring nut 33, and a gap of 1-5 mm is ensured between the inner wall of the receiving chamber 6 and the wiring unit 3. A square hole is formed between the first cover 43 and the second cover 44 for the wiring row 31 to pass through, and the square hole is connected to the receiving chamber 6.

[0051] Reference Figure 4 , Figure 5 In order to improve the sealing performance of the protective sleeve 4, the outer sides of the lower ends of the first and second protective sleeves 43 and 44 are fixedly connected with sealing convex strips 45, and a water collection groove 451 is provided on the upper side of the sealing convex strips 45. When it rains, rainwater enters the water collection groove 451, which increases the interaction force between the protective sleeve 4 and the incoming line side 21, and improves the sealing performance between the protective sleeve 4 and the incoming line side 21. The incoming line side 21 is provided with an annular groove 211 for inserting the sealing convex strips 45, and a sealing ring 46 is fitted between the sealing convex strips 45 and the bottom wall of the annular groove 211. The outer side of the sealing convex strips 45 is fixedly connected with a sealing edge 48 that is pressed against the upper surface of the incoming line side 21. The sealing performance between the protective sleeve 4 and the incoming line side 21 is further improved, and moisture is not easy to penetrate, which further prevents the terminal bolts 32, terminal nuts 33 and fasteners 34 from being affected by moisture and aging and corrosion.

[0052] Reference Figure 5 , Figure 6 In order to facilitate the replacement of the aged and damaged protective cover 4, there is a gap between the inner wall of the annular groove 211 and the sealing convex strip 45. The first cover 43 is fixedly connected with a flange 431 on one side close to the second cover 44. The second cover 44 is provided with a slot 441 for the flange 431 to be inserted, so that the first cover 43 and the second cover 44 can move back to back. In addition, the connection tightness between the first cover 43 and the second cover 44 is improved, so that moisture is not easy to enter from the joint between the first cover 43 and the second cover 44.

[0053] Reference Figure 5 , Figure 6 The outer wall of the upper end of the convex edge 431 is fixedly connected with a hook 432, and the slot 441 is connected with a slot 442 for inserting the hook 432. When disassembling, pressing the upper end of the first sheath 43 can make the hook 432 disengage from the slot 441, thereby facilitating the removal of the protective sheath 4. A sealing gasket 47 is clamped between the first sheath 43 and the second sheath 44 to further improve the sealing between the first sheath 43 and the second sheath 44.

[0054] Reference Figure 4 , Figure 7 The protective sleeve 4 is filled with electric composite grease, which is a neutral conductive dressing with good electrical contact performance. Relying on the high sealing performance of the protective sleeve 4 and the shape fit of the accommodating cavity 6, by injecting electric composite grease into the accommodating cavity 6, the contact resistance can be significantly reduced, thereby improving the long-term operating reliability of power equipment and transmission lines.

[0055] In order to facilitate timely replenishment of the power compound grease, in the embodiment of the present application, a grease injection port 49 is provided between the first sheath 43 and the second sheath 44, and a container 5 for storing the power compound grease is plugged into the grease injection port 49. In other embodiments, the grease injection port 49 may be provided separately on the first sheath 43 or the second sheath 44.

[0056] Reference Figure 7 The grease injection port 49 is arranged on the side of the protective sleeve 4 close to the wiring portion 311, and the side of the protective sleeve 4 close to the wiring portion 311 is provided with an inclined surface, and the inclined surface is perpendicular to the wiring portion 311. The container 5 includes a bottle body 51, a bottle mouth 52 fixedly connected to the bottle body 51, and a squeeze cover 53 threadedly connected to the inner side of the bottle body 51, the bottle mouth 52 is plugged into the grease injection port 49, and the squeeze cover 53 is fixedly connected with a knob 531.

[0057] The protective cover 4 can be made by injection molding, has high dimensional accuracy, can ensure sealing, and is easy to disassemble and replace. However, the cost of production is increased accordingly.

[0058] The implementation principle is:

[0059] When the protective sleeve 4 needs to be removed, first press the upper end of the first sleeve 43 to disengage the barb 432 from the slot 441, then pull the first sleeve 43 and the second sleeve 44 away from each other until they are completely separated, and then take out the first sleeve 43 and the second sleeve 44 upwards.

[0060] When the electric power compound grease needs to be replenished, the knob 531 is turned to move the extrusion cover 53 closer to the bottle mouth 52 , so that the electric power compound grease can be quickly pressed into the accommodating chamber 6 .

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A primary-secondary integrated pole-mounted circuit breaker, comprising a circuit breaker body (1), a plurality of sealed poles (2) connected to the circuit breaker, the sealed poles (2) comprising an incoming line side (21) and an outgoing line side (22), the incoming line side (21) being connected to a wiring unit (3), characterized in that: The wiring unit (3) comprises a wiring block (31), a wiring bolt (32) movably arranged in the wiring block (31) and threadedly connected to the incoming line side (21), and a wiring nut (33) threadedly connected to the wiring bolt (32), wherein the wiring nut (33) is arranged between the wiring block (31) and the incoming line side (21); The terminal block (31) comprises a terminal portion (311) and a clamping portion (312) connected to the terminal portion (311); the clamping portion (312) is sleeved on a rod portion of a terminal bolt (32); an end of the clamping portion (312) away from the terminal portion (311) is provided with a crack (3121) and is connected to a fastener (34); and the outer sides of the clamping portion (312), the terminal bolt (32) and the terminal nut (33) are collectively covered with a protective cover (4); The protective sheath (4) comprises a first sheath (43) and a second sheath (44), wherein the first sheath (43) and the second sheath (44) are detachably connected, and an accommodating cavity (6) is formed between the first sheath (43) and the second sheath (44); The lower ends of the first protective sleeve (43) and the second protective sleeve (44) are both connected to sealing convex strips (45); the inlet side (21) is provided with an annular groove (211) for inserting the sealing convex strip (45); a water accumulation groove (451) is provided on the upper side of the sealing convex strip (45); a gap is provided between the inner wall of the annular groove (211) and the sealing convex strip (45); a sealing ring (46) is provided between the sealing convex strip (45) and the bottom wall of the annular groove (211); and the outer side of the sealing convex strip (45) is connected to a sealing edge (48) pressed against the upper surface of the inlet side (21).

2. The primary and secondary integrated pole mounted circuit breaker according to claim 1, characterized in that: A convex edge (431) is connected to one side of the first sheath (43) close to the second sheath (44), and the second sheath (44) is provided with a slot (441) for the convex edge (431) to be inserted.

3. The primary and secondary integrated pole mounted circuit breaker according to claim 2, characterized in that: The outer wall of the upper end of the convex edge (431) is connected with a barb (432), and the slot (441) is connected with a slot (442) for the barb (432) to be inserted.

4. The primary and secondary integrated pole mounted circuit breaker according to claim 3, characterized in that: A sealing gasket (47) is clamped between the first sheath (43) and the second sheath (44).

5. The primary and secondary integrated pole mounted circuit breaker according to claim 1, characterized in that: The protective sleeve (4) is filled with electric composite grease, and the first sleeve (43) and / or the second sleeve (44) are provided with a grease injection port (49), and the grease injection port (49) is plugged with a container (5) for storing electric composite grease.

6. The primary and secondary integrated pole mounted circuit breaker according to claim 5, characterized in that: The container (5) comprises a bottle body (51), a bottle mouth (52) connected to the bottle body (51), and a squeeze cover (53) threadedly connected to the inner side of the bottle body (51); the bottle mouth (52) is plugged into a grease injection port (49), and the squeeze cover (53) is connected to a knob (531).

7. The primary and secondary integrated pole mounted circuit breaker according to claim 1, characterized in that: The wiring portion (311) is arranged obliquely upward in a direction away from the clamping portion (312).

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