Cofferdam structure capacitor

Abstract

The utility model discloses a cofferdam structure capacitor comprising a capacitor core which is connected with a binding post and a plurality of pairs of capacitor terminals. The encapsulation assembly mechanism comprises a shell, one end of the shell is provided with an assembly port for installing a capacitor core, one end of the assembly port is used for leading out a capacitor terminal, the other end of the assembly port is used for leading out a binding post, the outer side of the assembly port is provided with an encapsulation cofferdam ring arranged around the capacitor terminal, and the edge of the end, used for leading out the binding post, of the assembly port protrudes to form a cofferdam side blocking part; according to the utility model, after the capacitor core and the shell are assembled, the output connection structure of the capacitor can be led out from the assembly port at the end part of the shell, the output connection structure of the capacitor is surrounded by the filling cofferdam ring and the cofferdam side blocking part, and after the filling cofferdam ring and the cofferdam side blocking part are filled with the pouring sealant, the output connection structure of the capacitor can be connected with the cofferdam insertion sheet. The sealing performance of the inner side structure of the cofferdam can be improved, the creepage distance and the electric appliance gap are reduced, and the quality of the capacitor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor with a cofferdam structure. Background Art

[0002] A capacitor is two conductors placed close to each other with a non-conductive insulating medium in between. When a voltage is applied between the two plates of a capacitor, the capacitor will store charge. The capacitance of a capacitor is numerically equal to the ratio of the charge on one conductive plate to the voltage between the two plates. The basic unit of capacitance of a capacitor is farad. In circuit diagrams, the letter C is usually used to represent a capacitor element.

[0003] The open end of the metal shell is sealed by a metal sealing cover. When sealing between the metal sealing cover and the metal shell, if the operation is improper, leakage is likely to occur and the sealing effect is poor. It is necessary to improve the capacitor sealing cover and the capacitor structure using the sealing cover. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a capacitor with a cofferdam structure, which can ensure the sealing of the capacitor terminal area after the capacitor is assembled.

[0005] The technical scheme adopted by the utility model is: a cofferdam structure capacitor, including a capacitor core, the capacitor core is connected with a terminal block and a plurality of pairs of capacitor terminals; and also includes a potting assembly mechanism; the potting assembly mechanism includes a shell, one end of the shell is provided with an assembly opening for installing the capacitor core, one end of the assembly opening is for leading out the capacitor terminal, and the other end is for leading out the terminal block, a potting cofferdam ring arranged around the capacitor terminal is provided on the outer side of the assembly opening, an edge of one end of the assembly opening for leading out the terminal block protrudes to form a cofferdam side stop, a cofferdam insert is inserted in the notch of the cofferdam side stop, and the potting cofferdam ring and the inner side of the cofferdam side stop form a potting area.

[0006] According to the technical solution, after the capacitor core and the shell are assembled, the assembly opening at the end of the shell can lead out the capacitor terminals and the connecting posts. By arranging a potting cofferdam ring and a cofferdam side baffle to surround the output connection structure of the capacitor, and filling the potting ring and the cofferdam side baffle with potting glue, the sealing of the inner structure of the cofferdam of the capacitor can be improved, and the creepage distance and the electrical clearance can be reduced, thereby improving the sealing and stability of the capacitor assembly as a whole.

[0007] Preferably, slots are provided on both sides of the notch of the cofferdam side retaining portion, and the slots are plug-fitted with plug-in protrusions provided at both ends of the cofferdam insert.

[0008] Preferably, the potting cofferdam is provided with an outlet for each pair of capacitor terminals to pass through.

[0009] Preferably, an isolation boss is provided between each pair of capacitor terminals in the potting cofferdam circle for isolating the two capacitor terminals.

[0010] The beneficial effect of the utility model is that after the capacitor core and the shell are assembled, the capacitor terminals, terminal posts and other structures are surrounded by the potting cofferdam ring and the cofferdam side baffles. After the potting ring and the cofferdam side baffles are filled with potting glue, the sealing of the structural assembly inside the capacitor cofferdam can be improved, and the creepage distance and electrical clearance can be reduced, thereby improving the sealing and stability of the capacitor assembly as a whole, and having a high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0012] Figure 1 It is a schematic diagram of the assembly of the cofferdam structure capacitor provided in the embodiment of the utility model.

[0013] Figure 2 It is a three-dimensional diagram of a capacitor with a cofferdam structure provided in an embodiment of the utility model.

[0014] Reference numerals: terminal 100 , capacitor terminal 200 , housing 300 , assembly opening 310 , cofferdam side stop 320 , cofferdam insert 330 , slot 321 , plug-in protrusion 331 , potting cofferdam ring 400 , isolation boss 410 . DETAILED DESCRIPTION

[0015] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0016] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0017] like Figure 1 to Figure 2As shown, a specific embodiment of the utility model provides a capacitor with a cofferdam structure, which can improve the sealing and stability of the capacitor potting assembly; specifically includes a capacitor core, which is connected to a terminal 100 and a plurality of pairs of capacitor terminals 200; and also includes a potting assembly mechanism; the potting assembly mechanism includes a shell 300, one end of which is provided with an assembly opening 310 for installing the capacitor core, one end of the assembly opening 310 is provided for leading out the capacitor terminal 200, and the other end is provided for leading out the terminal 100, and a potting cofferdam ring 400 arranged around the capacitor terminal 200 is provided on the outside of the assembly opening 310, and the edge of one end of the assembly opening 310 for leading out the terminal 100 protrudes to form a cofferdam side stop 320, and a cofferdam insert 330 is inserted in the notch of the cofferdam side stop 320, and the potting cofferdam ring 400 and the inner side of the cofferdam side stop 320 form a potting area.

[0018] like Figure 1 to Figure 2 As shown, in this embodiment, the capacitor core can be assembled with the housing 300. After the assembly is completed, the assembly port 310 at the end of the housing 300 can lead out structures such as the capacitor terminal 200 and the terminal 100. In this embodiment, a potting cofferdam ring 400 and a cofferdam side stop 320 are set to surround the connection structure of the capacitor. After the potting ring is filled with potting glue, the sealing performance is improved. After the potting area formed by the cofferdam side stop 320 and the cofferdam insert 330 is filled with potting glue, the sealing performance of the capacitor output connection structure can be improved, the creepage distance and the electrical clearance can be reduced, and the overall stability of the capacitor can be improved.

[0019] like Figure 1 to Figure 2 As shown, in this embodiment, the notch position of the cofferdam side stopper 320 needs to be inserted into the cofferdam plug 330. In order to improve the installation stability of the cofferdam plug 330, this embodiment is provided with slots 321 on both sides of the notch of the cofferdam side stopper 320. The slots 321 are plugged and matched with the plugging protrusions 331 provided at both ends of the cofferdam plug 330. After the slots 321 are plugged and matched with the plugging protrusions 331, the cofferdam plug 330 can be stably installed.

[0020] As mentioned above, the area inside the potting ring corresponding to the assembly opening 310 needs to lead out the electric terminal. In this embodiment, a lead-out port for each pair of capacitor terminals 200 to pass through is provided in the potting ring 400. At the same time, in this embodiment, an isolation boss 410 is provided between each pair of capacitor terminals 200 in the potting ring 400 to isolate the two capacitor terminals 200. The isolation boss 410 can separate the capacitor terminals 200, thereby preventing the capacitor terminals 200 from contacting each other.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A cofferdam structure capacitor, comprising a capacitor core, the capacitor core being connected with a terminal post (100) and a plurality of pairs of capacitor terminals (200); characterized in that: Also included is a filling and dispensing mechanism; The potting assembly mechanism comprises a shell (300), one end of the shell (300) is provided with an assembly opening (310) for mounting a capacitor core, one end of the assembly opening (310) is for leading out the capacitor terminal (200), and the other end is for leading out the terminal (100), a potting cofferdam ring (400) arranged around the capacitor terminal (200) is provided on the outside of the assembly opening (310), the edge of one end of the assembly opening (310) for leading out the terminal (100) protrudes to form a cofferdam side stop (320), a cofferdam insert (330) is inserted into the notch of the cofferdam side stop (320), and the potting cofferdam ring (400) and the inner side of the cofferdam side stop (320) form a potting area.

2. The cofferdam structure capacitor according to claim 1, characterized in that: Slots (321) are provided on both sides of the notch of the cofferdam side blocking portion (320), and the slots (321) are plug-fitted with plug-in protrusions (331) provided at both ends of the cofferdam plug piece (330).

3. The cofferdam structure capacitor according to claim 1, characterized in that: The potting cofferdam ring (400) is provided with an outlet for each pair of capacitor terminals (200) to pass through.

4. The cofferdam structure capacitor according to claim 1, characterized in that: An isolation boss (410) for isolating the two capacitor terminals (200) is provided between each pair of capacitor terminals (200) in the potting cofferdam ring (400).

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