Cylindrical dry-type low-voltage power capacitor

Abstract

The utility model relates to the technical field of electric power facilities, in particular to a cylindrical dry-type low-voltage power capacitor, which comprises a shell, a radiating fin I, a radiating fin II, an electric appliance element arranged in the shell and terminals arranged at the top end and the bottom end of the shell, and one end of the radiating fin I is rotationally connected with one end of the radiating fin II through a hinge; the two ends of the outer wall of the circumference of the shell form extensions, bolts are elastically and slidably arranged on the two sides of the other end of the first cooling fin, grooves matched with the bolts are formed in the extensions, fixing grooves are formed in the two sides of the other end of the second cooling fin, balls are elastically arranged on the extensions, and one ends of the balls are located in the fixing grooves. The structure is simple, the installation mode of the two cooling fins is optimized, the cooling fins can be disassembled and assembled without tools, the size of the cooling fins is reduced, and the use limitation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power facilities, in particular to a cylindrical dry-type low-voltage power capacitor. Background Art

[0002] In the power system, cylindrical dry-type power capacitors play several key roles. Firstly, they can be used for reactive power compensation, that is, by providing or absorbing reactive power to improve the power factor of the system, reduce line losses and voltage drops, and optimize power transmission efficiency. Secondly, the capacitors can also play a filtering role, suppressing harmonics in the power grid and improving power quality.

[0003] The application number is: 201721703138.3, which discloses a cylindrical power capacitor, including a housing body. A wiring terminal is arranged at the middle position of the top of the housing body, a grounding terminal is arranged at the bottom of the housing body, two heat sinks are arranged on the outer side surface of the housing body, one ends of the two heat sinks are provided with connecting ears, a rotating shaft is arranged at the connection of the two connecting ears, and a fixing ear is arranged at the other end of each of the two heat sinks. In the utility model, heat sinks that can be flexibly disassembled and installed are added outside the housing body, and heat-conducting silica gel is added in the filling groove inside the heat sink. When the power capacitor generates a large amount of heat during operation, the heat is conducted to the heat sink through the heat-conducting silica gel, and the heat sink further transfers the heat to the air, thereby reducing the temperature of the outer surface of the power capacitor and reducing the probability of damage to the power capacitor. At the same time, the installation and disassembly of the heat sink are simple, and it is convenient to replace the heat-conducting silica gel in the filling groove.

[0004] The following disadvantages are found when the above device is used: The two heat sinks are connected by bolts and nuts. This method requires special tools for disassembly and assembly, and increases the volume of the power capacitor, bringing limitations to its use. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a cylindrical dry-type low-voltage power capacitor, which has a simple structure, optimizes the installation method of the two heat sinks, can be disassembled and assembled without tools, and reduces the volume of the heat sink, reducing the use limitations.

[0006] A cylindrical dry-type low-voltage power capacitor of the utility model includes a housing, a first heat sink and a second heat sink, electrical components arranged inside the housing, and terminals arranged at both the top and bottom ends of the housing. One end of the first heat sink is rotatably connected to one end of the second heat sink through a hinge; extensions are formed at both ends of the circumferential outer wall of the housing. Elastic sliding pins are arranged on both sides of the other end of the first heat sink, grooves matching with the pins are arranged on the extensions, fixing grooves are arranged on both sides of the other end of the second heat sink, and balls are elastically arranged on the extensions, and one end of the balls is located in the fixing grooves.

[0007] As a preferred embodiment of the present utility model, guide rings are fixed on both sides of the other end of the first heat sink, the pin passes through the guide rings, a fixing ring is fixed on the pin, a first spring is sleeved on the pin, and two ends of the first spring are respectively in contact with the fixing ring and the guide rings.

[0008] As a preferred embodiment of the present utility model, the end of the pin away from the extension bends towards the side to form an extension part;

[0009] Flap pieces are fixed on both sides of the other end of the first heat sink.

[0010] As a preferred embodiment of the present utility model, the flap pieces are provided with protrusions.

[0011] As a preferred embodiment of the present utility model, a through hole is formed in the extension, one end of the through hole close to the first heat sink is arc-shaped, the ball is placed at one end of the through hole close to the first heat sink, and one end of the ball protrudes from the extension.

[0012] As a preferred embodiment of the present utility model, a sink is provided at the end of the through hole away from the first heat sink, a retaining cover is provided at the sink, and a second spring is provided between the retaining cover and the ball.

[0013] As a preferred embodiment of the present utility model, the retaining cover is fixed at the sink by screws.

[0014] As a preferred embodiment of the present utility model, chamfering treatment is performed on the end of the pin close to the extension.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: the extension provided can play a role in supporting and limiting the first heat sink and the second heat sink, preventing them from being misaligned with the housing. Through the pin and ball structures provided, the first heat sink and the second heat sink can be quickly disassembled and assembled without using additional tools, and the structures such as the pin and the ball will not increase the volume of the heat sink, reducing the usage limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model;

[0017] Figure 2 is Figure 1 the top view of

[0018] Figure 3 is a schematic structural view of the housing, the terminal and the extension;

[0019] Figure 4 is Figure 2 the sectional view taken along line A-A in

[0020] Figure 5Yes Figure 1 Partial enlarged view of part A in

[0021] Figure 6 Schematic structural diagram of the housing, terminals and extension

[0022] Figure 7 Yes Figure 1 Partial enlarged view of part A in

[0023] Reference numerals in the drawings: 1. Housing; 2. First heat sink; 3. Second heat sink; 4. Terminals; 6. Extension; 7. Plug; 8. Groove; 9. Fixing groove; 10. Ball; 11. Guide ring; 12. Fixing ring; 13. First spring; 14. Extension part; 15. Flap; 16. Protrusion; 17. Through hole; 18. Cover; 19. Second spring. Detailed implementation manners

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the drawings of the specification.

[0025] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, the so-called "embodiment" herein refers to specific features, structures or characteristics that can be included in at least one implementation manner of the present utility model. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments. Embodiment

[0027] Referring to Figures 1-7 , this embodiment provides a cylindrical dry-type low-voltage power capacitor, which includes a housing 1, a first heat sink 2 and a second heat sink 3, electrical components disposed inside the housing 1, and terminals 4 disposed at both the top and bottom ends of the housing 1. One end of the first heat sink 2 is rotatably connected to one end of the second heat sink 3 through a hinge; both ends of the circumferential outer wall of the housing 1 form extensions 6. Plug pins 7 are elastically and slidably disposed on both sides of the other end of the first heat sink 2. Grooves 8 cooperating with the plug pins 7 are provided on the extensions 6. Fixing grooves 9 are provided on both sides of the other end of the second heat sink 3. Ball bearings 10 are elastically disposed on the extensions 6, and one end of each ball bearing 10 is located inside the fixing groove 9;

[0028] In this embodiment, the heat sink 1 2 and the heat sink 2 3 are both attached to the circumferential side wall of the housing 1, and after the heat sink 1 2 and the heat sink 2 3 are installed, the top and bottom side walls of the heat sink 1 2 and the heat sink 2 3 are in contact with the extension 6, which plays a role in limiting the heat sink 1 2 and the heat sink 2 3 and improving the stability of the heat sink 1 2 and the heat sink 2 3. When installing the heat sink 1 2, it is buckled on the circumferential side wall of the housing 1, and the latch 7 is operated to insert the latch 7 into the groove 8 to fix the heat sink 1 2, and then under the action of the hinge Rotate the heat sink 23, the heat sink 23 squeezes the bottom end of the ball 10, so that the ball 10 is away from the heat sink 23. When the heat sink 23 is in close contact with the circumferential side wall of the shell 1, the ball 10 is elastically acted on, and one end of the ball 10 is in the fixing groove 9, so that the position of the heat sink 23 is fixed. When removing the heat sink 23, it is only necessary to pull the heat sink 23 to rotate it, so that the ball 10 can move upward and disengage from the fixing groove 9, thereby removing the heat sink 23, and then disengage the latch 7 from the groove 8 and separate the heat sink 2 from the shell 1.

[0029] As a preferred embodiment of the present invention, refer to Figure 3 , Figures 5-7 , guide rings 11 are fixed on both sides of the other end of the heat sink 2, and the pin 7 passes through the guide ring 11. Figure 5 As shown, the inner wall of the guide ring 11 and the cross-section of the latch 7 are both circular, so that the latch 7 can both rotate and slide relative to the guide ring 11, the latch 7 is fixed with a fixing ring 12, and the latch 7 is sleeved with a spring 13, and the two ends of the spring 13 are respectively in contact with the fixing ring 12 and the guide ring 11. Under the elastic force of the spring 13, the latch 7 has a tendency to move toward the extension 6; the end of the latch 7 away from the extension 6 is bent to the side to form an extension 14, and through the provided extension 14, the user can hold the extension 14 to move the latch 7; blocking pieces 15 are fixed on both sides of the other end of the heat sink 2; the blocking piece 15 is provided with a protrusion 16;

[0030] In this embodiment, if Figure 5 As shown, under the elastic force of spring 13, the latch 7 can remain inserted into the groove 8 and does not separate from the groove 8. When the heat sink 2 needs to be removed, the extension 14 is pinched and rotated so that the moving path of the latch 7 does not touch the protrusion 16, and then the latch 7 is moved away from the extension 6, and the latch 7 is rotated to make the extension 14 contact with the baffle 15 to prevent the latch 7 from moving toward the extension 6. The protrusion 16 is set to prevent the latch 7 from separating from the baffle 15 in the case of vibration. The end of the latch 7 close to the extension 6 is chamfered, and the chamfering can guide the latch 7, making it more convenient for the latch 7 to be inserted into the groove 8.

[0031] As a preferred embodiment of the present invention, refer to Figure 4 and Figure 6 , the epitaxial portion 6 is provided with a through hole 17, such asFigure 4 As shown, one end of the through hole 17 close to the first heat sink 2 is arc-shaped. The ball 10 is placed at one end of the through hole 17 close to the first heat sink 2, and one end of the ball 10 protrudes from the extension 6. To prevent the ball 10 from detaching from the through hole 17, most of the ball 10 is inside the through hole 17; a counterbore is provided at the end of the through hole 17 away from the first heat sink 2. A retaining cover 18 is provided at the counterbore, and a second spring 19 is provided between the retaining cover 18 and the ball 10; the retaining cover 18 is fixed to the counterbore by screws.

[0032] In this embodiment, under the elastic force of the second spring 19, the ball 10 is at the arc-shaped end of the through hole 17. When the second heat sink 3 rotates and exerts pressure on the ball 10, the ball 10 will move upward. When the ball 10 is aligned with the fixing groove 9, under the elastic force of the second spring 19, a small part of the ball 10 extends into the fixing groove 9, playing a role in fixing the heat sink. The retaining cover 18 is fixed to the counterbore by screws, which facilitates the replacement of the ball 10 and the second spring 19.

[0033] It should be understood that in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing, and production.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cylindrical dry-type low-voltage power capacitor, comprising a housing (1), a first heat sink (2) and a second heat sink (3), electrical components arranged inside the housing (1), and terminals (4) arranged at both the top and bottom ends of the housing (1), one end of the first heat sink (2) is rotatably connected to one end of the second heat sink (3) through a hinge; characterized in that, On both ends of the circumferential outer wall of the housing (1), extensions (6) are formed. On both sides of the other end of the first heat sink (2), pins (7) are elastically and slidably arranged. Grooves (8) cooperating with the pins (7) are provided on the extensions (6). On both sides of the other end of the second heat sink (3), fixing grooves (9) are provided. The extensions (6) are elastically provided with balls (10), and one end of the balls (10) is located in the fixing grooves (9).

2. The cylindrical dry-type low-voltage power capacitor according to claim 1, characterized in that, On both sides of the other end of the first heat sink (2), guide rings (11) are fixed. The pins (7) pass through the guide rings (11). Fixing rings (12) are fixed to the pins (7). A first spring (13) is sleeved on the pins (7), and both ends of the first spring (13) are in contact with the fixing rings (12) and the guide rings (11) respectively.

3. A cylindrical dry-type low-voltage power capacitor according to claim 2, characterized in that, One end of the pin (7) away from the extension (6) is bent towards the side to form an extension part (14); On both sides of the other end of the first heat sink (2), retaining plates (15) are fixed.

4. The cylindrical dry-type low-voltage power capacitor according to claim 3, characterized in that, Protrusions (16) are provided on the retaining plates (15).

5. A cylindrical dry-type low-voltage power capacitor according to claim 1, characterized in that, Through holes (17) are formed in the extensions (6). One end of the through holes (17) close to the first heat sink (2) is arc-shaped. The balls (10) are placed at one end of the through holes (17) close to the first heat sink (2), and one end of the balls (10) protrudes from the extensions (6).

6. The cylindrical dry-type low-voltage power capacitor according to claim 5, characterized in that, A sink is provided at the end of the through hole (17) away from the first heat sink (2). A retaining cover (18) is provided at the sink. A second spring (19) is provided between the retaining cover (18) and the balls (10).

7. A cylindrical dry-type low-voltage power capacitor as claimed in claim 6, wherein, The retaining cover (18) is fixed to the sink by screws.

8. A cylindrical dry-type low-voltage power capacitor according to claim 4, characterized in that, Chamfering treatment is performed on one end of the pin (7) close to the extension (6).

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