Two-pole direct-current special power equipment

Abstract

Two-pole direct-current special power equipment relating to the technical field of low-voltage electric appliances. The equipment comprises a shell (1), a contact system and an arc-extinguishing chamber (2), wherein two mounting cavities (3) in a height direction of the shell (1) are formed in the shell (1), the two mounting cavities (3) are arranged in the shell (1) in a length direction of the shell (1), the contact system and the arc-extinguishing chamber (2) are mounted in each mounting cavity (3), the arc-extinguishing chamber (2) is located above the contact system and is configured to allow an electric arc generated by the presence of a voltage when the contact system is separated to enter the arc-extinguishing chamber (2) for an arc-extinguishing operation, and two opposite side walls of the mounting cavity (3) are provided with an edge a and an edge b respectively. According to the power equipment, in the case of guaranteeing a constant depth, a three-pole or multi-pole open contact in the prior art is replaced with a two-pole open contact, namely, the mounting cavity, voltage division is realized by increasing and decreasing the number of arc-extinguishing grid plates, breaking is enabled above 1500 V, and a small occupied size is achieved.

Description

A two-pole DC special power equipment Technical Field

[0001] The utility model relates to a two-pole direct current special electric power device, belonging to the technical field of low-voltage electrical appliances. Background Art

[0002] DC power equipment has a simple arc extinguishing device that can cut off the rated current and a certain amount of overload current, but cannot cut off short-circuit current. The new energy market is currently demanding higher DC voltages, reaching DC1500V and above, and power equipment is also required to be smaller and cheaper.

[0003] Currently, the power equipment commonly used in the market uses AC products with more than three poles connected in series (as shown in Figure 1). By increasing the number of breakers and arc extinguishing chambers, voltage division is achieved to achieve a breaking voltage of more than 1500V. However, the increase in the number of series poles leads to a large product size and high cost, which cannot meet the needs of the new energy market.

[0004] Therefore, there is an urgent need for a two-pole DC dedicated power equipment.

[0005] Utility Model Content

[0006] The present invention aims to solve the technical problems mentioned in the above background technology by adopting the following technical solutions:

[0007] A two-pole DC special power equipment, comprising a housing, a contact system, and an arc extinguishing chamber;

[0008] Two installation cavities are provided inside the shell along the height direction of the shell, and the two installation cavities are arranged inside the shell along the length direction of the shell, and the depths of the two installation cavities are equal. A contact system and an arc extinguishing chamber are installed inside each of the installation cavities, and the arc extinguishing chamber is located above the contact system, and is used for the arc generated by the voltage when the contact system is separated to enter the arc extinguishing chamber for arc extinguishing operation, and the two opposite side walls of the installation cavity are respectively set as the a side and the b side, and a connecting piece is provided on the a side or the b side of the installation cavity, which is used to fix the arc extinguishing chamber inside the installation cavity.

[0009] Preferably, along the length direction of the shell, the connectors for fixing the arc extinguishing chamber are respectively fixed to side a of the mounting cavity at one end of the shell, side b of the mounting cavity at the other end of the shell, and a side wall shared by two adjacent mounting cavities, that is, a side wall formed when side a and side b are in contact or close to each other;

[0010] Or along the length direction of the shell, at this time, all the arc extinguishing chambers are covered by the fixing plate, and the fixing plate is fixed on the a side and the b side of the installation cavity through the connecting piece.

[0011] Preferably, the contact system includes a moving contact, a clamping plate, a contact support, and a bracket, wherein the moving contact is rotatably sleeved on the clamping plate via a first rotating shaft, the top of the clamping plate is mounted on the contact support via a connecting piece, and the bottom of the bracket is mounted on the housing via screws, and a semi-circular arc groove is provided on the side wall of the bracket, and a second rotating shaft is rotatably sleeved in the semi-circular arc groove, and there are two second rotating shafts, which are respectively fixed below the two outer side walls of the clamping plate;

[0012] A static contact piece is also provided inside the shell, and the contact piece provided on the top of the moving contact corresponds to the static contact piece, and when the static contact piece and the contact piece are in contact, the electrical equipment is conductive; when the static contact piece and the contact piece are separated for a moment after contact, the arc generated by the voltage at this time enters the arc extinguishing chamber for arc extinguishing operation.

[0013] Preferably, the interior of the shell is provided with a static busbar and a dynamic busbar in parallel along the height direction of the shell, and the static busbar is located above the dynamic busbar, and the static contact piece is fixed on the static busbar located on the upper layer inside the shell, and the bottom of the dynamic contact is matched with the second rotating shaft on the side wall of the dynamic busbar located on the lower layer inside the shell, and the second rotating shaft is used to assist the rotation of the dynamic contact.

[0014] Preferably, a connecting rod is further provided inside the shell, and a main shaft and a cantilever are further provided outside the shell, one end of the cantilever is welded to the main shaft, and the other end of the cantilever is hinged to the connecting rod, a third rotating shaft is installed on the contact support, and the other end of the connecting rod is rotatably connected to the third rotating shaft.

[0015] Preferably, an arc-extinguishing grid is fixedly installed in the arc-extinguishing chamber, and the arc-extinguishing grid is located at the inner top of the shell.

[0016] Preferably, the shell is assembled from a base and a bottom plate.

[0017] Preferably, along the length direction of the shell, the number of connectors fixed on the side a of the mounting cavity at one end of the top of the shell and the top of the shell close to the side a, the number of connectors fixed on the side b of the mounting cavity at the other end of the top of the shell and the top of the shell close to the side b, and the number of connectors on the sides a and b of two adjacent arc extinguishing chambers are all 1, and each connector is installed in the middle position of the side a and the side b of the mounting cavity respectively.

[0018] Preferably, along the length direction of the shell, there are a total of multiple connectors fixed on the mounting cavity side a at one end of the top of the shell and the top of the shell close to side a, connectors fixed on the mounting cavity side b at the other end of the top of the shell and the top of the shell close to side b, and connectors on the a side and b side of two adjacent arc extinguishing chambers; and the multiple connectors are evenly divided into multiple parts according to the number of mounting cavities, and one of the connectors is respectively installed on the a side of one end of the shell along the length direction of the shell, the other connector is respectively installed on the b side of the other end of the shell along the length direction of the shell, and each of the remaining connectors is respectively installed on the a side of one mounting cavity and the b side of the other mounting cavity of each two adjacent arc extinguishing chambers.

[0019] Furthermore, along the length direction of the shell, two connecting parts are provided on the edge of side a on one end of the shell and on the edge of side b on the other end of the shell, and two connecting parts are commonly provided on the side a of one of the mounting cavities and the side b of the other mounting cavity on two adjacent arc extinguishing chambers.

[0020] Preferably, along the length direction of the shell, all the arc extinguishing chambers are covered by the fixing plate, and the number of connectors required when one end of the fixing plate is fixed to the mounting cavity a side located at one end of the shell and the shell close to the a side and the number of connectors required when the other end is fixed to the mounting cavity b side located at one end of the shell and the shell close to the b side are both 1, and one of the connectors is installed in the middle position of one end of the fixing plate, and the other connector is installed in the middle position of one end of the fixing plate, and along the length direction of the shell, a number of connectors are also installed on the U-shaped plate and the shell.

[0021] Preferably, along the length direction of the shell, all the arc extinguishing chambers are covered by the fixing plate, and the number of connectors required when one end of the fixing plate is fixed to the side a of the mounting cavity located at one end of the shell and the shell close to the side a and the number of connectors required when the other end is fixed to the side b of the mounting cavity located at one end of the shell and the shell close to the side b are both multiple, and the multiple connectors are evenly divided into two parts, and one of the connectors is installed at one end of the fixing plate, and the other is installed at the other end of the fixing plate, and along the length direction of the shell, a number of connectors are also installed on the U-shaped plate and the shell.

[0022] Furthermore, the number of connectors required when one end of the fixing plate is fixed to the side a of the mounting cavity located at one end of the shell and the shell close to the side a, and the number of connectors required when the other end is fixed to the side b of the mounting cavity located at one end of the shell and the shell close to the side b are both 2, and two of the connectors are installed on the two edges of one end of the fixing plate, and the other two connectors are installed on the two edges of the other end of the fixing plate, and along the length direction of the shell, a number of connectors are also installed on the U-shaped plate and the shell.

[0023] Preferably, the height direction of the shell is the same as the height direction of the arc extinguishing chamber, the length direction of the shell is consistent with the width direction of the arc extinguishing chamber, and the width direction of the shell is consistent with the length direction of the arc extinguishing chamber.

[0024] It should be noted that the power equipment refers to one of the disconnectors, circuit breakers and load switches.

[0025] It should be noted that the connecting piece is one of a screw, a rivet, a bolt and a nut combination.

[0026] The beneficial effects of the present invention are as follows: the present power equipment, while ensuring that the depth remains unchanged, uses a two-pole fracture, that is, an installation cavity, to replace the three-pole or more fractures of the prior art, and realizes voltage division by increasing or decreasing the number of arc-extinguishing grids, thereby achieving a breaking voltage of more than 1500V. Generally speaking, the present power equipment occupies a small volume and meets market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of the prior art;

[0028] Figure 2 is a schematic diagram of the positions of the arc extinguishing chamber, placement cavity, arc extinguishing grid, housing, and installation cavity of the present invention;

[0029] FIG3 is a schematic structural diagram of the utility model after vertical sectioning along the middle position of the shell;

[0030] FIG4 is a schematic structural diagram of the operating mechanism of the present invention after vertical sectioning along the middle position of the housing;

[0031] FIG5 is a schematic structural diagram of part A in FIG4 ;

[0032] Figure 6 is a schematic structural diagram of the operating mechanism of the present invention;

[0033] FIG7 is a schematic structural diagram of the third rotating shaft, connecting rod and contact support 20 in the operating mechanism of the present invention;

[0034] In the figure: housing 1, arc extinguishing chamber 2, mounting cavity 3, clamping plate 4, moving contact 5, first rotating shaft 6, static contact piece 7, contact piece 8, static busbar 9, moving busbar 10, second rotating shaft 11, bracket 12, bottom plate 13, base 14, motor 15, cantilever 16, connecting rod 17, main shaft 18, third rotating shaft 19, contact support 20. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0036] Example 1

[0037] As shown in Figure 1-7, a two-pole DC dedicated power device includes a housing 1, a contact system, and an arc extinguishing chamber 2;

[0038] Two mounting cavities 3 are provided inside the housing 1 along the height direction of the housing 1, and the two mounting cavities 3 are arranged inside the housing 1 along the length direction of the housing 1. The depths of the two mounting cavities 3 are equal. A contact system and an arc extinguishing chamber 2 are installed inside each mounting cavity 3, and the arc extinguishing chamber 2 is located above the contact system. It is used for the arc generated by the voltage when the contact system is separated to enter the arc extinguishing chamber 2 for arc extinguishing operation, and the two opposite side walls of the mounting cavity are respectively set as the a side and the b side. Screws are provided on the a side or the b side of the mounting cavity 3 for fixing the arc extinguishing chamber 2 inside the mounting cavity 3.

[0039] Along the length direction of the shell 1, the screws for fixing the arc extinguishing chamber 2 are respectively fixed on the a side of the installation cavity 3 at one end of the shell 1, the b side of the installation cavity 3 at the other end of the shell 1, and the side wall shared by two adjacent installation cavities 3, that is, the side wall formed when the a side and the b side are in contact or close to each other.

[0040] An arc-extinguishing grid is fixedly installed in the arc-extinguishing chamber 2 , and the arc-extinguishing grid is located at the inner top of the housing 1 .

[0041] The housing 1 is assembled from a base 14 and a bottom plate 13 , and the housing 1 is in a rectangular parallelepiped shape, with a height greater than a length greater than a width of the housing 1 .

[0042] The contact system includes a moving contact 5, a clamping plate 4, a contact support 20, and a bracket 12. The moving contact 5 is rotatably sleeved on the clamping plate 4 via a first rotating shaft 6. The top of the clamping plate 4 is mounted on the contact support 20 via screws. The bottom of the bracket 12 is mounted on the housing 1 via screws. A semi-circular groove is provided on the side wall of the bracket 12. A second rotating shaft 11 is rotatably sleeved in the semi-circular groove. There are two second rotating shafts 11, which are respectively fixed below the two outer side walls of the clamping plate 4.

[0043] A static contact piece 7 is also provided inside the housing 1. The contact piece 8 provided on the top of the moving contact 5 corresponds to the static contact piece 7. When the static contact piece 7 and the contact piece 8 are in contact (mainly when the contact piece 8 is in contact with the static silver point on the static contact piece 7), the power equipment is conductive; when the static contact piece 7 and the contact piece 8 are separated for a moment after contact, the arc generated by the voltage at this time enters the arc extinguishing chamber 2 for arc extinguishing operation.

[0044] The interior of the shell 1 is provided with a static busbar 9 and a dynamic busbar 10 in parallel along the height direction of the shell 1, and the static busbar 9 is located above the dynamic busbar 10, and the static contact piece 8 is fixed on the static busbar 9 located on the upper layer inside the shell 1, and one end of the dynamic contact 5 is softly connected to the dynamic busbar 10, and the second rotating shaft 11 is used to assist the rotation of the dynamic contact 5 (it should be noted that the second rotating shaft 11 is an axis installed on the splint 4, and the second rotating shaft 11 is the center of rotation of the dynamic contact 5).

[0045] A connecting rod 17 is also provided inside the housing 1, and a main shaft 18 and a cantilever 16 are also provided outside the housing 1. One end of the cantilever 16 is welded to the main shaft 18, and the other end of the cantilever 16 is hinged to the connecting rod 17. A third rotating shaft 19 is installed on the contact support 20, and the other end of the connecting rod 17 is rotatably connected to the third rotating shaft 19.

[0046] It should be noted that the rotation of the main shaft 18 is achieved by an operating mechanism installed on the outside of the housing 1, and the operating mechanism adopts existing technology, such as the operating mechanism disclosed in patent publication number CN208093490U, which is named an improved operating mechanism.

[0047] The height direction of the housing 1 is the same as the height direction of the arc extinguishing chamber 2 , the length direction of the housing 1 is consistent with the width direction of the arc extinguishing chamber 2 , and the width direction of the housing 1 is consistent with the length direction of the arc extinguishing chamber 2 .

[0048] Working principle: This power equipment places an arc extinguishing chamber 2 on the top of the shell 1. When the main shaft 18 rotates, it drives the rotation of the cantilever 16, and then drives the rotation of the connecting rod 17, thereby driving the rotation of the first rotating shaft 6. Since the moving contact 5 is assisted by the second rotating shaft 11, the moving contact 51 is deflected inside the shell 1. When the contact piece 8 on the moving contact 5 contacts the static contact piece 7 located on the upper static bus 9 inside the shell 1 during deflection, the power equipment is conductive at this time. When the static contact piece 7 and the contact piece 8 are separated for a moment after contact, the arc generated by the voltage enters the arc extinguishing chamber 2 for arc extinguishing operation.

[0049] It should also be noted that the arc extinguishing chamber grid on the power equipment is installed on the arc extinguishing chamber 2 using existing technology, which will not be elaborated here.

[0050] Example 2

[0051] This embodiment is basically the same as embodiment 1, with the difference that, along the length direction of the shell 1, the number of screws fixed on the a side of the mounting cavity 3 at one end of the top of the shell 1 and the top of the shell 1 close to the a side is the same as the number of screws fixed on the b side of the mounting cavity 3 at the other end of the top of the shell 1 and the top of the shell 1 close to the b side, as well as the number of screws on the a side and b side of two adjacent arc extinguishing chambers 2, and the multiple screws are evenly divided into multiple parts according to the number of mounting cavities 3, and one part of the screws is respectively installed on the a side of one end of the shell 1 along the length direction of the shell 1, the other part of the screws is respectively installed on the b side of the other end of the shell 1 along the length direction of the shell 1, and each part of the screws in the remaining parts is respectively installed on the a side of one mounting cavity 3 and the b side of the other mounting cavity 3 of each two adjacent arc extinguishing chambers 2, and the screws are not arranged on the a side edge and the b side edge of the corresponding mounting cavity 3.

[0052] Example 3

[0053] This embodiment is basically the same as Example 1, except that, along the length direction of the shell 1, two screws are provided on the edge of side a on one end of the shell 1 and on the edge of side b on the other end of the shell 1, and two screws are provided on the side a of one of the mounting cavities 3 and the side b of the other mounting cavity 3 of two adjacent arc extinguishing chambers 2.

[0054] Example 4

[0055] This embodiment is basically the same as embodiment 1, with the difference being that, along the length direction of the shell 1, all arc extinguishing chambers 2 are covered by a fixing plate, and one end of the fixing plate is fixed to the side of the mounting cavity 3a at one end of the shell 1 and the shell 1 close to the a side by screws, and the other end is fixed to the side of the mounting cavity 3b at one end of the shell 1 and the shell 1 close to the b side by screws, so as to fix the arc extinguishing chamber 2 inside the mounting cavity 3.

[0056] The number of screws required to fix one end of the fixing plate to the side of the mounting cavity 3a located at one end of the shell 1 and the shell 1 close to the a side and the number of screws required to fix the other end to the side of the mounting cavity 3b located at one end of the shell 1 and the shell 1 close to the b side are both 1, and one of the screws is installed in the middle position of one end of the fixing plate, and the other screw is installed in the middle position of one end of the fixing plate, and along the length direction of the shell 1, a number of screws are also installed on the U-shaped plate and the shell 1.

[0057] Example 5

[0058] This embodiment is basically the same as embodiment 4, with the difference that the number of screws required to fix one end of the fixing plate to the side of the mounting cavity 3a located at one end of the shell 1 and the shell 1 close to the a side and the number of screws required to fix the other end to the side of the mounting cavity 3b located at one end of the shell 1 and the shell 1 close to the b side are both multiple, and the multiple screws are evenly divided into two parts, and one part of the screws is installed at one end of the fixing plate, and the other part is installed at the other end of the fixing plate, and along the length direction of the shell 1, a number of screws are also installed on the U-shaped plate and the shell 1, and the screws are not arranged on the edge of the a side and the b side of the corresponding mounting cavity 3.

[0059] Example 6

[0060] This embodiment is basically the same as Example 4, except that the number of screws required when fixing one end of the fixing plate to the side of the mounting cavity 3a located at one end of the shell 1 and the shell 1 close to the a side and the number of screws required when fixing the other end to the side of the mounting cavity 3b located at one end of the shell 1 and the shell 1 close to the b side are both 2, and 2 of the screws are installed on the two edges of one end of the fixing plate, and the other 2 screws are installed on the two edges of the other end of the fixing plate, and a number of screws are also installed on the U-shaped plate and the shell 1 along the length direction of the shell 1.

[0061] It should be noted that the power equipment in Examples 1-6 refers to one of an isolating switch, a circuit breaker, and a load switch.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments and that various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-pole DC special power equipment, Features: It includes housing, contact system and arc extinguishing chamber; Two installation cavities along the height direction of the shell are opened inside the shell, and the two installation cavities are arranged inside the shell along the length direction of the shell, and a contact system and an arc extinguishing chamber are installed inside each of the installation cavities, and the arc extinguishing chamber is located above the contact system, and is used for the arc generated by the voltage when the contact system is separated to enter the arc extinguishing chamber for arc extinguishing operation, and the two opposite side walls of the installation cavity are respectively set as the a side and the b side, and a connecting piece is provided on the a side or the b side of the installation cavity, which is used to fix the arc extinguishing chamber inside the installation cavity.

2. A two-pole DC dedicated power equipment according to claim 1, Features: Along the length direction of the shell, the connecting pieces for fixing the arc extinguishing chamber are respectively fixed on the side a of the mounting cavity at one end of the shell, the side b of the mounting cavity at the other end of the shell, and the side wall shared by two adjacent mounting cavities; Or along the length direction of the shell, at this time, all the arc extinguishing chambers are covered by the fixing plate, and the fixing plate is fixed on the a side and the b side of the installation cavity through the connecting piece.

3. A two-pole DC dedicated power equipment according to claim 1, Features: The contact system comprises a moving contact, a clamping plate, a contact support, and a bracket. The moving contact is rotatably sleeved on the clamping plate through a first rotating shaft. The top of the clamping plate is mounted on the contact support through a connecting piece. The bottom of the bracket is mounted on the housing through screws. A semi-circular arc groove is provided on the side wall of the bracket. A second rotating shaft is rotatably sleeved in the semi-circular arc groove. There are two second rotating shafts, which are respectively fixed below the two outer side walls of the clamping plate. The housing is also provided with a stationary contact piece, and the contact piece provided at the top of the moving contact corresponds to the stationary contact piece. When the stationary contact piece and the contact piece are in contact, the electrical equipment conducts electricity. When the contact pieces separate for a split second after contact, the arc generated by the voltage enters the arc extinguishing chamber for arc extinguishing.

4. A two-pole DC dedicated power equipment according to claim 3, Features: The interior of the shell is provided with a static busbar and a dynamic busbar in parallel along the height direction of the shell, and the static busbar is located above the dynamic busbar, and the static contact piece is fixed on the static busbar located on the upper layer inside the shell, and the dynamic contact rotates around the second rotating shaft as the center of the circle.

5. A two-pole DC dedicated power equipment according to claim 3, Features: A connecting rod is also provided inside the shell, and a main shaft and a cantilever are also provided outside the shell. One end of the cantilever is welded to the main shaft, and the other end of the cantilever is hinged to the connecting rod. A third rotating shaft is installed on the contact support, and the other end of the connecting rod is rotatably connected to the third rotating shaft.

6. A two-pole DC dedicated power equipment according to claim 2, Features: Along the length direction of the shell, the number of connectors fixed on the a side of the mounting cavity at one end of the shell, the number of connectors fixed on the b side of the mounting cavity at the other end of the shell, and the number of connectors on the common side walls (a side and b side) of two adjacent mounting cavities are all 1, and each connector is installed in the middle position of the a side and the b side of the mounting cavity respectively.

7. A two-pole DC dedicated power equipment according to claim 2, Features: Along the length direction of the shell, there are a total of multiple connecting parts fixed on the a side of the mounting cavity at one end of the shell, the connecting parts fixed on the b side of the mounting cavity at the other end of the shell, and the connecting parts on the common side walls (a side and b side) of two adjacent mounting cavities; and the multiple connecting parts are evenly divided into multiple parts according to the number of mounting cavities, and one of the connecting parts is respectively installed on the a side of one end of the shell along the length direction of the shell, and the other connecting parts is respectively installed on the b side of the other end of the shell along the length direction of the shell, and each of the remaining connecting parts is respectively installed on the a side of one of the mounting cavities and the b side of the other mounting cavity of every two adjacent mounting cavities.

8. A two-pole DC dedicated power equipment according to claim 2, Features: Along the length direction of the shell, all the arc extinguishing chambers are covered by the fixing plate, and the number of connectors required for fixing one end of the fixing plate to the side of the mounting cavity a at one end of the shell and the number of connectors required for fixing the side of the mounting cavity b at the other end of the shell are both 1, and one of the connectors is installed at the middle position of one end of the fixing plate, and the other connector is installed at the middle position of one end of the fixing plate, and along the length direction of the shell, a number of connectors are also installed on the U-shaped plate and the shell.

9. A two-pole DC dedicated power equipment according to claim 2, Features: Along the length direction of the shell, all the arc extinguishing chambers are covered by the fixed plate, and the number of connectors required when one end of the fixed plate is fixed to the side of the mounting cavity a located at one end of the shell and the number of connectors required when the other end is fixed to the side of the mounting cavity b located at one end of the shell are both multiple, and the multiple connectors are evenly divided into two parts, and one of the connectors is installed at one end of the fixed plate, and the other is installed at the other end of the fixed plate, and along the length direction of the shell, a number of connectors are also installed on the fixed plate and the shell.

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