Arc extinguish chamber with protection function for circuit breaker

Abstract

The utility model discloses an arc extinguish chamber with a protection function for a circuit breaker, which comprises a shell, a movable end cover plate and a static end cover plate which are respectively arranged at two ends of the shell, and a movable conducting rod arranged on the movable end cover plate, and two shell static end cover plates for protecting the shell are arranged on the shell. The two shell static end cover plates are both provided with extension parts attached to the top of the shell, so that the shell static end cover plates can be arranged on the outer wall of the shell in a sleeving mode. According to the utility model, the first protective sleeve and the second protective sleeve which are spliced in a double-half manner are matched, the first protective sleeve directly isolates the external impact, and the second protective sleeve is used for buffering, so that the design of the double-layer protective sleeve realizes the double protection of the shell, and the service life of the shell is prolonged. The shell is prevented from being impacted or falling to the ground to be broken, the first protective sleeve and the second protective sleeve can be rapidly installed through cooperative use of the connecting pieces, the fixing holes and the cramps, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing chambers, in particular to an arc extinguishing chamber with a protection function for a circuit breaker. Background Art

[0002] With the increasing demand for electricity in various industries, and the need to ensure reliable and continuous power supply, high-quality power quality, and economical operation of the entire power system, the construction of smart grids, strong grids, and energy internet is becoming increasingly important. Therefore, as a core equipment, switchgear will play an increasingly important role in future development.

[0003] As an important type of electrical equipment in high-voltage switches, circuit breakers are responsible for conducting current and controlling the conduction circuit under normal operation in the power grid. The exterior of the existing circuit breaker arc extinguishing chamber is mainly composed of a moving end cover plate, a static end cover plate and a shell. The shell accounts for the majority of the parts and is usually made of ceramic. During maintenance and replacement operations by staff, if the arc extinguishing chamber is hit or falls to the ground due to staff operating errors, the shell will be broken and unusable. Utility Model Content

[0004] The purpose of the present utility model is to provide an arc extinguishing chamber with a protective function for a circuit breaker, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an arc extinguishing chamber with a protective function for a circuit breaker, comprising a housing, a movable end cover plate and a static end cover plate respectively mounted at both ends of the housing, and a movable conductive rod mounted on the movable end cover plate. The housing is provided with two static end cover plates for protecting the housing, and both of the static end cover plates are provided with an extension portion that fits with the top of the housing, so that the static end cover plates can be sleeved on the outer wall of the housing.

[0006] As a preferred solution of the present invention, the static end cover of the shell includes a first protective sleeve and a second protective sleeve, the first protective sleeve and the second protective sleeve are fixedly connected, and the extension is fixed on the top of the second protective sleeve so that the second protective sleeve fits the outer wall of the shell.

[0007] As a preferred solution of the present invention, a first heat dissipation slot for discharging heat is provided on the first protective sleeve, and a second heat dissipation slot for discharging heat is provided on the second protective sleeve.

[0008] As a preferred solution of the present invention, the first heat dissipation groove is a spiral structure, and the second heat dissipation groove is a rectangular structure.

[0009] As a preferred solution of the present invention, one of the first protective sleeves is fixedly connected to a connecting piece, which has a fixing hole, and the other first protective sleeve is fixedly connected to a fastener used in conjunction with the fixing hole.

[0010] As a preferred solution of the present invention, a heat sink is provided on the movable conductive rod.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention cooperates with the first protective sleeve and the second protective sleeve by setting a double-half-spliced joint, the first protective sleeve directly blocks the impact from the outside, and is buffered by the second protective sleeve, the double-layer protective sleeve design can achieve double protection for the outer shell, avoiding the outer shell from being hit or falling to the ground and breaking, and the coordinated use of the connecting piece, the fixing hole and the buckle nail can quickly install the first protective sleeve and the second protective sleeve, thereby improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure in which the protective part and the shell are separated in the present utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the protective part of the utility model;

[0015] Figure 4 For the utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0016] In the figure: 1. outer shell; 2. moving end cover; 3. moving conductive rod; 4. static end cover; 5. first protective sleeve; 6. first heat dissipation slot; 7. second protective sleeve; 8. second heat dissipation slot; 9. extension; 10. connecting piece; 11. fixing hole; 12. fastener; 13. heat sink; 14. protective part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1 to 4The utility model provides a technical solution: an arc extinguishing chamber with a protective function for a circuit breaker, comprising a housing 1, a movable end cover plate 2 and a static end cover plate 4 respectively installed at both ends of the housing 1, and a movable conductive rod 3 installed on the movable end cover plate 2. The housing 1 is provided with two protective parts 14 for protecting the housing 1. Both protective parts 14 are provided with an extension part 9 that fits with the top of the housing 1. The extension part 9 is a circular ring structure, so that the protective part 14 can be sleeved on the outer wall of the housing 1. The protective part 14 protects the housing 1 and prevents the arc extinguishing chamber from being damaged when it is hit or dropped.

[0019] Among them, the protective part 14 includes a first protective sleeve 5 and a second protective sleeve 7, the first protective sleeve 5 and the second protective sleeve 7 are fixedly connected, the first protective sleeve 5 is provided with a first heat dissipation groove 6 for heat dissipation, and the second protective sleeve 7 is provided with a second heat dissipation groove 8 for heat dissipation. The first heat dissipation groove 6 and the second heat dissipation groove 8 can dissipate heat for the outer shell 1, the first protective sleeve 5 is used to block external impact, the extension part 9 is fixed to the top of the second protective sleeve 7, so that the second protective sleeve 7 is fitted with the outer wall of the outer shell 1, and the second protective sleeve 7 can buffer the impact of the first protective sleeve 5 and protect the outer shell 1.

[0020] The first heat dissipation slot 6 is a spiral structure, and the second heat dissipation slot 8 is a rectangular structure, which ensures that the housing 1 can be protected while not affecting heat dissipation.

[0021] Among them, one of the first protective sleeve sleeves 5 is fixedly connected to a connecting piece 10, and a fixing hole 11 is opened on the connecting piece 10. The other first protective sleeve sleeve 5 is fixedly connected to a fastener 12 used in conjunction with the fixing hole 11. After the two protective parts 14 are correspondingly mounted on the outer wall 1, the fastener 12 can be fastened into the fixing hole 11 to fix the two protective parts 14.

[0022] The moving conductive rod 3 is provided with a heat sink 13 to dissipate the heat on the moving conductive rod 3 .

[0023] Specifically, first align the two second protective sleeves 7 with the top of the outer shell 1 and then dock them, and then buckle the pins 12 into the fixing holes 11 to fix the two first protective sleeves 5 and the second protective sleeves 7 on the outer wall of the outer shell 1. When the arc extinguishing chamber is hit or falls, the first protective sleeve 5 will block the impact to prevent the outer shell 1 from being directly damaged by external impact, and the second protective sleeve 7 can cushion the impact on the first protective sleeve 5, further reducing the impact on the outer shell 1.

[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0026] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An arc extinguishing chamber with a protective function for a circuit breaker, comprising a housing (1), a movable end cover (2) and a static end cover (4) respectively mounted at two ends of the housing (1), and a movable conductive rod (3) mounted on the movable end cover (2), characterized in that: The housing (1) is provided with two housing (1) static end covers (4) for protecting the housing (1), and both of the housing (1) static end covers (4) are provided with extensions (9) that fit with the top of the housing (1), so that the housing (1) static end covers (4) can be fitted onto the outer wall of the housing (1).

2. The arc extinguishing chamber with a protective function for a circuit breaker according to claim 1, characterized in that: The static end cover plate (4) of the housing (1) comprises a first protective sleeve (5) and a second protective sleeve (7), wherein the first protective sleeve (5) and the second protective sleeve (7) are fixedly connected, and the extension portion (9) is fixed to the top of the second protective sleeve (7) so that the second protective sleeve (7) fits the outer wall of the housing (1).

3. The arc extinguishing chamber with a protective function for a circuit breaker according to claim 2, characterized in that: The first protective sleeve (5) is provided with a first heat dissipation groove (6) for discharging heat, and the second protective sleeve (7) is provided with a second heat dissipation groove (8) for discharging heat.

4. The arc extinguishing chamber with a protective function for a circuit breaker according to claim 3, characterized in that: The first heat dissipation groove (6) is a spiral structure, and the second heat dissipation groove (8) is a rectangular structure.

5. The arc extinguishing chamber with a protective function for a circuit breaker according to claim 2, characterized in that: One of the first protective sleeves (5) is fixedly connected to a connecting piece (10), and a fixing hole (11) is provided on the connecting piece (10); the other first protective sleeve (5) is fixedly connected to a fastening nail (12) used in conjunction with the fixing hole (11).

6. The arc extinguishing chamber with a protective function for a circuit breaker according to claim 1, characterized in that: A heat sink (13) is provided on the movable conductive rod (3).

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