Waterproof top cover structure of circuit breaker shell

Abstract

The utility model relates to the technical field of top cover structures of circuit breaker shells, and provides a waterproof top cover structure of a circuit breaker shell, which comprises a top cover assembly mounted on a shell body. The top cover assembly comprises a closed top cover, a transfer ring cover, a sealing outer ring, a sealing inner ring and a fixing unit used for fixing the transfer ring cover and the closed top cover to the shell body, the sealing outer ring and the sealing inner ring are both located between the closed top cover and the transfer ring cover, and the sealing inner ring is located in an inner ring of the sealing outer ring. The problem that the waterproof performance of the circuit breaker shell is easy to degrade due to long-term ultraviolet irradiation and even does not have a waterproof function in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker casing top cover structure technical field, specifically, relate to a kind of circuit breaker casing waterproof top cover structure. BACKGROUND

[0002] Circuit breaker can be divided into outdoor circuit breaker and indoor circuit breaker according to use environment, wherein, outdoor circuit breaker is as a kind of key protection equipment of outdoor power system, mainly used for automatically cutting off current when circuit overload, short circuit or ground fault occurs, to protect the safety of electrical equipment and line.

[0003] Since outdoor circuit breaker is usually directly exposed to natural environment, it needs to withstand various severe weather, such as rain, snow, wind, sand, high temperature, low temperature, etc. Among them, rain and snow weather is common, in order to prevent rain and snow weather from bringing water flow into the circuit breaker casing, causing the internal components of the circuit breaker to be damp, short circuit or corrosion, the existing circuit breaker casing and top cover are usually provided with rubber sealing ring, which realizes waterproof function by means of rubber sealing ring.

[0004] However, due to the fact that the circuit breaker casing and the top cover are not completely closed, the sealing ring is still in the natural environment, and in the summer and other periods of strong sunlight, the sealing ring is easy to be aged due to long-term exposure to ultraviolet radiation, which affects its sealing performance, and even causes it to no longer play the role of waterproof. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of circuit breaker casing waterproof top cover structure, solve the problem that the waterproof performance of circuit breaker casing in relevant technology is easy to be degraded even no longer have waterproof function due to long-term exposure to ultraviolet radiation.

[0006] The technical scheme of the utility model is as follows:

[0007] A kind of circuit breaker casing waterproof top cover structure, including top cover assembly for being installed on casing body, the top cover assembly includes closed top cover, transfer ring cover, sealing outer ring, sealing inner ring, and fixing unit for fixing transfer ring cover and closed top cover on casing body, the sealing outer ring and sealing inner ring are located between closed top cover and transfer ring cover, and the sealing inner ring is located in the inner ring of sealing outer ring.

[0008] Further, the transfer ring cover is provided with mounting groove, upper bending limiting ring, the sealing outer ring is located in mounting groove, and the sealing inner ring is located between mounting groove and upper bending limiting ring, and the inner and outer rings of sealing inner ring abut upper bending limiting ring and sealing outer ring respectively.

[0009] Further, the transfer ring cover is provided with lower bending shielding ring, and the lower bending shielding ring is located at the outer ring of transfer ring cover.

[0010] Further, the closed top cover is provided with a sunken fitting part for fitting the fixing unit, and the horizontal height of the sunken fitting part close to one end of the transfer ring cover is lower than the horizontal height of the upper bending limiting ring close to one end of the closed top cover

[0011] Further, the longitudinal section of the mounting groove is in an inverted isosceles trapezoidal structure.

[0012] Further, the fixing unit comprises a plurality of first fixing pressure rods, a plurality of threaded parts for abutting the first fixing pressure rods against the closed top cover, and the transfer ring cover is provided with a plurality of fitting holes for fitting the threaded parts.

[0013] Further, the fixing unit further comprises a plurality of second fixing pressure rods, each of the first fixing pressure rods and the second fixing pressure rods is provided with a first fixing hole for fitting the threaded parts, each of the first fixing holes is coaxially arranged with each of the fitting holes one by one; each of the second fixing pressure rods is provided with a fitting extension part on both sides, each of the fitting extension parts is located above each of the first fixing pressure rods, and each of the fitting extension parts is provided with a second fixing hole for fitting the threaded parts.

[0014] The working principle and beneficial effects of the utility model are as follows:

[0015] The utility model mainly includes closed top cover, transfer ring cover, sealing outer ring, sealing inner ring and fixing unit for fixing the transfer ring cover and the closed top cover on the shell body, specifically, the closed top cover is located above the transfer ring cover, the closed top cover can be clamped with the shell body to transfer ring cover when fixing the closed top cover, and the fixing work of the transfer ring cover and the closed top cover on the shell body is completed.

[0016] The sealing outer ring and the sealing inner ring are located between the closed top cover and the transfer ring cover, the sealing outer ring and the sealing inner ring can seal, and the sealing inner ring is located in the inner ring of the sealing outer ring, that is, the sealing inner ring can prolong its aging time (service life) by shielding external ultraviolet rays with the sealing outer ring and the closed top cover, effectively avoiding the phenomenon that the sealing assembly in the utility model degrades or even disappears in waterproof performance over time. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0018] Figure 1 It is a structural schematic view of the embodiment;

[0019] Figure 2 It is a structural schematic view of the embodiment fitting the shell body;

[0020] Figure 3 It is Figure 2An enlarged view of the middle A;

[0021] Figure 4 A structure schematic view of the embodiment without the threaded part;

[0022] Figure 5 A Figure 4 An enlarged view of the middle B;

[0023] Figure 6 A structure schematic view of the shell body to be matched by the embodiment.

[0024] In the figure:

[0025] 1, top cover assembly; 11, closed top cover; 111, sunken matching part; 12, transfer ring cover; 121, mounting groove; 122, upper bending limiting ring; 123, lower bending shielding ring; 124, matching hole; 13, sealing outer ring; 14, sealing inner ring; 15, fixing unit; 151, first fixing pressure rod; 152, threaded part; 153, second fixing pressure rod; 154, first fixing hole; 1531, matching extension part; 1532, second fixing hole. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are involved in the protection scope of the utility model.

[0027] As Figures 1-3 , Figure 6 shown, the embodiment provides a circuit breaker shell waterproof top cover structure, mainly including a top cover assembly 1 for being installed on a shell body, specifically, the top cover assembly 1 includes a closed top cover 11, a transfer ring cover 12, a sealing outer ring 13, a sealing inner ring 14 and a fixing unit 15 for fixing the transfer ring cover 12 and the closed top cover 11 on the shell body, the sealing outer ring 13 and the sealing inner ring 14 are located between the closed top cover 11 and the transfer ring cover 12, so that when the fixing unit 15 fixes the transfer ring cover 12 and the closed top cover 11, the transfer ring cover 12 and the closed top cover 11 can form clamping to the sealing outer ring 13 and the sealing inner ring 14, and then the sealing outer ring 13 and the sealing inner ring 14 are fixed together, and the fixing work of the embodiment on the shell body (circuit breaker shell) is completed.

[0028] And due to the design of the double sealing ring (the sealing outer ring 13 and the sealing inner ring 14), not only the waterproof performance is improved, but also the sealing outer ring 13 and the closed top cover 11 can shield the sealing inner ring 14, so that the external ultraviolet rays can only irradiate the sealing outer ring 13 at most. Since the sealing outer ring 13 and the sealing inner ring 14 are two independent parts, the aging phenomenon of the sealing outer ring 13 is difficult to spread to the sealing inner ring 14. Thus, the influence of external ultraviolet rays on the sealing inner ring 14 inside the structure of the embodiment can be effectively reduced, thereby avoiding the phenomenon that the waterproof performance of the embodiment gradually degrades or even disappears over time (long-term exposure to ultraviolet rays).

[0029] The transfer ring cover 12 in the embodiment is provided with a mounting groove 121 and an upper bending limiting ring 122. The sealing outer ring 13 is located in the mounting groove 121, and the sealing inner ring 14 is located between the mounting groove 121 and the upper bending limiting ring 122. The inner and outer rings of the sealing inner ring 14 abut against the upper bending limiting ring 122 and the sealing outer ring 13, respectively. That is, during the assembly process of the embodiment, the sealing outer ring 13 is first embedded in the mounting groove 121. By virtue of the structural characteristics of the mounting groove 121, the sealing outer ring 13 is limited and a second mounting groove is formed between the sealing outer ring 13 and the upper bending limiting ring 122, so that the sealing inner ring 14 is embedded. Thus, the movement of the sealing inner ring 14 and the sealing outer ring 13 in the radial direction is limited, the sealing part of the embodiment is limited, and the phenomenon of falling off of the sealing part during fixing the overall structure of the embodiment is effectively avoided.

[0030] In order to improve the portability (convenient replacement of the aging sealing outer ring 13) of the installation and disassembly of the sealing outer ring 13, the longitudinal section of the mounting groove 121 in the embodiment is an inverted isosceles trapezoidal structure. That is, the mounting groove 121 has a wider opening (slot), which provides more operating space for the staff and makes the sealing outer ring 13 more easily put into or taken out of the mounting groove 121, effectively reducing the risk of distortion or damage during installation. Preferably, the longitudinal section of the sealing outer ring 13 is also an isosceles trapezoidal structure, so as to cooperate with the mounting groove 121.

[0031] Meanwhile, due to the design of the upward bending limiting ring 122 bending upward, even if rainwater seeps in between the closed top cover 11 and the transfer ring cover 12, it will be hindered by the upward bending limiting ring 122, making it difficult to enter the inside of the shell body; the transfer ring cover 12 is provided with a downward bending shielding ring 123 located at the outer ring of the transfer ring cover 12, which shields the connecting gap between the transfer ring cover 12 and the shell body, so that when the rainwater falling on the surface of the present embodiment flows to the connecting gap between the transfer ring cover 12 and the shell body, it will continue to slide vertically along the transfer ring cover 12 (part of the upward bending limiting ring 122) directly under the influence of gravity. Effectively improve the waterproof effect of the present embodiment.

[0032] The upward bending limiting ring 122 and the downward bending shielding ring 123 in the present embodiment are preferably integrally formed with the transfer ring cover 12 to ensure the connection strength between the two.

[0033] As shown in Figures 3-5 The fixing unit 15 in the present embodiment mainly includes a plurality of first fixing pressure rods 151, a plurality of threaded parts 152 for abutting the first fixing pressure rods 151 against the closed top cover 11, and a plurality of cooperation holes 124 provided on the transfer ring cover 12 for cooperating with each threaded part 152. The threaded part 152 in the present embodiment is preferably a combination of a bolt and a nut, the bolt is fixedly connected to the shell body, and the presence of each cooperation hole 124 on the transfer ring cover 12 and the design of a plurality of first fixing holes 154 on each first fixing pressure rod 151 can make each bolt penetrate both, so that by rotating the nut, the nut is gradually abutted against the first fixing pressure rod 151 and the first fixing pressure rod 151 is abutted against the closed top cover 11, completing the fixing work of the closed top cover 11 and the transfer ring cover 12.

[0034] Compared with directly fixing the closed top cover 11 by the nut, fixing the closed top cover 11 by the first fixing pressure rod 151 can ensure that there is enough contact area between the fixing unit 15 and the closed top cover 11, thereby improving the stability of the fixing unit 15 when it plays a fixing role.

[0035] In order to avoid the interference between adjacent first fixing pressure rods 151 affecting the contact area between them and the closed top cover 11, the fixing unit 15 in the present embodiment should also include a plurality of second fixing pressure rods 153, each second fixing pressure rod 153 is also provided with a plurality of first fixing holes 154, each first fixing hole 154 is coaxially arranged with each cooperation hole 124 one by one, so as to be fixed by the threaded part 152. Each first fixing pressure rod 151 and each second fixing pressure rod 153.

[0036] Specifically, each second fixed pressing rod 153 is located between adjacent first fixed pressing rods 151, for example, each second fixed pressing rod 153 corresponds to each side of the rectangular structure of the rectangular transfer ring cover 12, each second fixed pressing rod 153 is provided with a matching extension portion 1531 on both sides, each matching extension portion 1531 is located above each first fixed pressing rod 151, so that each second fixed pressing rod 153 cooperates with each first fixed pressing rod 151, and each matching extension portion 1531 is provided with a second fixed hole 1532 for cooperating with the threaded part 152, each second fixed hole 1532 is coaxially arranged with the first fixed hole 154 located below the matching extension portion 1531, so that the threaded part 152 corresponding to the second fixed hole 1532 and the first fixed hole 154 simultaneously fixes both, in this way, the fixed connection between adjacent fixed pressing rods can be realized, and sufficient contact area between each fixed pressing rod and the closed top cover 11 can be ensured, thereby ensuring the pressing effect (fixed effect) of each fixed pressing rod on the closed top cover 11.

[0037] The closed top cover 11 is provided with a sunken matching portion 111 for cooperating with the fixed unit 15, the existence of the sunken matching portion 111 can effectively avoid the mutual interference between the closed top cover 11 and the transfer ring cover 12 (the upper bending limiting portion 122) during installation, effectively ensuring the feasibility of the embodiment; at the same time, the horizontal height of one end of the sunken matching portion 111 close to the transfer ring cover 12 is lower than the horizontal height of one end of the upper bending limiting ring 122 close to the closed top cover 11, that is, the transfer ring cover 12 and the closed top cover 11 have a limiting structure, which ensures that the relative position of the closed top cover 11 on the transfer ring cover 12 can be quickly found when the closed top cover 11 is installed.

[0038] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker housing waterproof top cover structure comprising a top cover assembly (1) for mounting on a housing body, characterized in that, The top cover assembly (1) comprises a closing top cover (11), a transfer ring cover (12), a sealing outer ring (13), a sealing inner ring (14), and a fixing unit (15) for fixing the transfer ring cover (12) and the closing top cover (11) on a shell body, the sealing outer ring (13) and the sealing inner ring (14) are located between the closing top cover (11) and the transfer ring cover (12), and the sealing inner ring (14) is located in an inner ring of the sealing outer ring (13).

2. The circuit breaker housing waterproof top cover structure of claim 1, wherein, The transfer ring cover (12) is provided with a mounting groove (121) and an upper bending limiting ring (122), the sealing outer ring (13) is located in the mounting groove (121), the sealing inner ring (14) is located between the mounting groove (121) and the upper bending limiting ring (122), and the inner and outer rings of the sealing inner ring (14) abut against the upper bending limiting ring (122) and the sealing outer ring (13) respectively.

3. The circuit breaker housing waterproof top cover structure of claim 1 or 2, wherein, The transfer ring cover (12) is provided with a lower bending shielding ring (123), and the lower bending shielding ring (123) is located at an outer ring of the transfer ring cover (12).

4. The circuit breaker housing waterproof top cover structure of claim 2, wherein, The closing top cover (11) is provided with a sunken fitting part (111) for fitting the fixing unit (15), and a horizontal height of one end of the sunken fitting part (111) close to the transfer ring cover (12) is lower than a horizontal height of one end of the upper bending limiting ring (122) close to the closing top cover (11).

5. The circuit breaker housing waterproof top cover structure of claim 2, wherein, A longitudinal section of the mounting groove (121) is an inverted isosceles trapezoidal structure.

6. The circuit breaker housing waterproof top cover structure of claim 1 or 4, wherein, The fixing unit (15) comprises a plurality of first fixing pressure rods (151) and a plurality of threaded parts (152) for abutting against the closing top cover (11), and the transfer ring cover (12) is provided with a plurality of fitting holes (124) for fitting the threaded parts (152).

7. The circuit breaker housing waterproof top cover structure of claim 6, wherein, The fixing unit (15) further comprises a plurality of second fixing pressure rods (153), each of the first fixing pressure rods (151) and the second fixing pressure rods (153) is provided with a first fixing hole (154) for fitting the threaded parts (152), and each of the first fixing holes (154) is coaxially arranged with each of the fitting holes (124) one by one. Each of the second fixing pressure rods (153) is provided with a fitting extension part (1531) on both sides, each of the fitting extension parts (1531) is located above each of the first fixing pressure rods (151), and each of the fitting extension parts (1531) is provided with a second fixing hole (1532) for fitting the threaded parts (152).

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