CN211377453U

CN211377453U - Terminal box

Info

Publication number: CN211377453U
Application number: CN201922128860.4U
Authority: CN
Inventors: 姜国栋
Original assignee: Shenzhen Zhenru Electrical Technology Co ltd
Current assignee: Shenzhen Zhenru Electrical Technology Co ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-08-28
Anticipated expiration: 2029-11-30

Abstract

The utility model provides a junction box, including the body that is used for holding electrical component, install the breather valve on the body, anti condensation water joint is installed to at least one side of body. The anti-condensation waterproof joint can effectively prevent external water vapor from entering the junction box from the cable insulation layer, the breather valve can remove redundant water vapor in the junction box, and further can prevent the water vapor from condensing under the condition of large temperature difference to influence the electrical performance of the electrical elements in the junction box, and can discharge expanded hot air at high temperature, so that the heat of the electrical elements in the junction box is dissipated, and the service life of the electrical elements in the junction box is prolonged.

Description

Terminal box

Technical Field

The utility model relates to a junction box.

Background

In the power supply of outdoor equipment, in order to reduce the power failure range of peripheral equipment caused by a fault of a certain electric equipment, electric protection equipment such as a fuse, an overcurrent protection circuit breaker or an earth leakage protection circuit breaker is generally installed in an equipment terminal (such as a lamp post access door, an installation hidden hole and the like) so as to cut off a fault source. The installation methods of the electric protection devices are generally two, one method is bare installation, and the method is simple and convenient to operate, but is not dustproof and waterproof; the other method is to adopt a waterproof junction box for installation, and the method can prevent water and dust and ensure the safety of the operating environment of the electrical protection equipment.

However, current waterproof junction box installations suffer from the following drawbacks:

(1) the cable directly extends into the junction box from the outside, and water vapor entering the junction box from the cable insulation layer cannot be isolated;

(2) the junction box has good tightness, water vapor entering the junction box cannot be discharged, if the ambient temperature changes greatly, the temperature difference between the inside and the outside of the junction box can cause the water vapor to be condensed in the junction box, the electrical performance of the junction box is influenced, meanwhile, the service life of electrical equipment in the junction box is shortened, and the failure of the junction box of a circuit breaker is easily caused in a condensation state for a long time;

(3) without the observation window, the state of the junction box cannot be observed during work, and maintenance operation cannot be performed without disassembling the box body.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a junction box to solve the technical problem that the junction box cannot prevent water or cannot remove water vapor in the junction box, so that water vapor condensation or high temperature cannot dissipate heat to affect the electrical performance and the service life of the junction box.

A junction box comprises a body for containing electric elements, wherein a breather valve is installed on the body, and at least one side surface of the body is provided with a condensation-resistant waterproof joint.

Further, the body comprises a box body and a box cover, and the box body is used for containing the electric elements.

Further, the breather valve is mounted on the lid.

Further, at least one side of the box body is provided with the anti-condensation waterproof joint.

Furthermore, a transparent window is arranged on the box cover, and one end of the transparent window is rotatably connected with the box cover.

Furthermore, a gasket is arranged between the box body and the box cover.

Further, the breather valve is a one-way valve or a cold flow exhalation valve.

Furthermore, the anti-condensation waterproof connector comprises a female end and a male end, the female end is used for connecting a cable led out from the junction box, the male end is used for connecting a cable accessed from the outside, and the female end is in plug connection with the male end.

Further, female end one side is connected with female end spiral cover, female end spiral cover with the other end that female end is connected with the front end housing, the front end housing with the body is connected.

Furthermore, a male end screw cap is connected to one side of the male end, and the other end of the male end screw cap, which is connected with the male end, is connected with a rear end cover.

The utility model discloses beneficial effect:

(1) the breather valve can remove redundant water vapor in the junction box and keep the air pressure in the junction box balanced, so that the situation that the air in the junction box is heated and expanded under the condition of high temperature at the periphery of the junction box or the water vapor is condensed under the condition of large temperature difference to influence the electrical performance of electrical elements in the junction box is prevented, the heat dissipation performance of the junction box is effectively improved, and the service life of the electrical elements in the junction box is prolonged;

(2) the anti-condensation waterproof joint can effectively prevent external water vapor from entering the junction box from the cable insulating layer, and can effectively reduce the influence of the water vapor on the operation of electric elements in the junction box;

(3) the male end and the female end of the condensation-resistant waterproof connector are connected in a plug-in manner, and when a cable is replaced, the connector is only disassembled, so that the junction box and the condensation-resistant waterproof connector are convenient to install and quick to replace, can be repeatedly used for many times, and saves cost;

(4) the box cover of the junction box is provided with the transparent window, so that the state of the electric protector in the box can be observed in the operation process, the electric elements in the box can be manually operated by opening the transparent window, and the selection diversity of operation and maintenance personnel in the field is increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a junction box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a junction box body according to an embodiment of the present invention;

fig. 3 is an explosion structure diagram of the condensation-resistant waterproof joint provided by the embodiment of the present invention.

Description of the main elements

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. To the extent that the term "includes" and any variations thereof are used in either the detailed description or the claims, as well as the appended drawings, this is intended to cover non-exclusive inclusions.

Fig. 1 shows a schematic structural view of the junction box of the present embodiment. As shown in fig. 1, the junction box 100 includes a body 10, and the body 10 is used to accommodate electrical components, such as electrical protectors and the like.

The body 10 comprises a box body 12 and a box cover 11, wherein the box body 12 and the box cover 11 are connected in a separated mode, and the connection mode can be a screw mode, a bolt mode and the like. A gasket 13 may be disposed between the box body 12 and the box cover 11 to prevent external impurities such as water, dust, gas, etc. from entering the junction box 100, so that the junction box 100 may reach a protection level IP 67.

The box cover 11 can be provided with a transparent window 14, and one end of the transparent window 14 is rotatably connected with the box cover 11, so that the transparent window 14 can be opened and closed relative to the box cover 11. The transparent window 14 and the box cover 11 can be connected in a hinged manner, a rotating shaft connection manner and the like. The box cover 11 can also be provided with a rotary rod 15, the rotary rod 15 is a locking device, and if the rotary rod 15 is screwed tightly, the transparent window 14 cannot be opened; when the rotating rod 15 is rotated, the transparent window 14 can be opened by manual operation.

As shown in fig. 1, the body 10 of the junction box 100 may have the breather valve 20 mounted thereon, wherein the breather valve 20 may be mounted on the box cover 11, among other things. For example, as shown in fig. 1 and 2, a first hole 16 may be formed on the box cover 11, and the inlet end of the breather valve 20 extends into the interior of the junction box 100 through the first hole 16, and the breather valve 20 may be fixed by using a nut.

The breather valve 20 may be a one-way valve that includes a valve seat and a flap. Wherein, the valve flap is in a closed state when the internal and external air pressures of the junction box 100 are balanced or the external air pressure is greater than the internal air pressure, so as to prevent external air from entering the junction box 100; and is in an open state when the internal pressure of the terminal block 100 is greater than the external pressure to allow the gas inside the terminal block 100 to be discharged out of the terminal block. Further, the breather valve 20 can prevent the excessive gas from being exhausted outside the junction box 100 after the external gas enters the junction box 100 and breaks the balance, so as to keep the air pressure in the junction box 100 balanced and timely exhaust the water vapor in the junction box 100.

The breathing valve 20 may be a cold flow exhalation valve or the like, for example, the breathing valve 20 may be a one-way valve or an exhalation valve or the like disclosed in patent documents CN102695549A, CN109715252A or CN 101330945A.

As shown in fig. 1, the body 10 of the junction box 100 may be mounted on at least one side thereof with a condensation-resistant waterproof joint 30, wherein the condensation-resistant waterproof joint 30 may be particularly mounted on at least one side of the box body 12.

In some embodiments, condensation resistant watertight fittings 30 may be mounted on both opposing sides of the box 12.

Fig. 3 shows an exploded view of the condensation resistant watertight joint 30. The anti-condensation waterproof connector 30 comprises a female end 31 and a male end 32, wherein the female end 31 is used for connecting a cable led out from the junction box 100; the male end 32 is used to connect to an externally accessible cable, such as a power cable. Wherein, female end 31 and male end 32 are all seted up a plurality of cable holes, and the cable can peg graft in the cable hole to fix through screw 39.

The female end 31 and the male end 32 can be connected through a plug connection. For example, the female end 31 may be provided with a first plugging portion 311, and the male end 32 may be provided with a second plugging portion 321, wherein, in some embodiments, the second plugging portion 321 may be a plugging hole, and the first plugging portion 311 may be inserted into the second plugging portion 321 to achieve connection between the female end 31 and the male end 32; in some embodiments, in other embodiments, the first mating part 311 may be a mating hole, and the second mating part 321 may be inserted into the first mating part 311 to connect the female end 31 and the male end 32.

The insertion position of the female end 31 and the male end 32 may further be provided with a connection cover 33, wherein the connection cover 33 and the female end 31 and the male end 32 may be in threaded connection to achieve fastening of the connection between the female end 31 and the male end 32.

As shown in fig. 3, a female screw cap 34 is disposed on one side of the female end 31, and the female end 31 and the female screw cap 34 are connected by a screw thread.

The other end that female end spiral cover 34 is connected with female end 31 is connected with front end housing 36, also can be through threaded connection between female end spiral cover 34 and the front end housing 36, can also be provided with waterproof rubber ring 35 between female end spiral cover 34 and the front end housing 36 to the protection level that makes female end 31 can reach IP 68.

As shown in fig. 2, the female end 31 of the condensation-resistant waterproof joint 30 is also connected with the body 10 of the junction box 100, wherein the female end 31 may be connected with the box body 12, in particular.

As shown in fig. 2 and 3, a second hole 17 may be formed on a side surface of the box body 12, and the front end cover 36 is connected to the second hole 17 to further achieve connection between the anti-condensation waterproof connector 30 and the body 10. The front end cover 36 and the second hole 17 may be connected by a screw connection, an interference fit connection, or an adhesive connection.

As shown in fig. 3, a male end screw cap 37 is disposed on one side of the male end 32, and the male end 32 and the male end screw cap 37 are connected by a screw thread.

The other end of the male end screw cap 37 connected with the male end 32 is connected with a rear end cap 38, the male end screw cap 37 is connected with the rear end cap 38 through threads, and a waterproof rubber ring is arranged between the male end screw cap 37 and the rear end cap 38, so that the protection grade of the male end 32 can reach IP 68.

In this embodiment, the connection between the male end cap 37 and the rear end cap 38 may be a retractable structure, for example, a fan-tooth structure. When the male end cap 37 is screwed tightly with the rear end cap 38, the waterproof rubber ring and the externally introduced cable can be squeezed, so that the cable is in close contact with the waterproof rubber ring, and water vapor is prevented from entering the male end 32. Furthermore, the anti-condensation waterproof joint 30 can effectively prevent external moisture from entering the junction box 100 from the cable insulation layer.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a junction box, includes the body that is used for holding electrical component, its characterized in that, install the breather valve on the body, anti condensation water joint is installed to at least one side of body, anti condensation water joint includes female end and public end, female end is used for connecting the cable that the junction box was drawn forth, public end is used for connecting the cable of external access, female end with be plug-in connection between the public end.

2. The junction box of claim 1, wherein the body includes a box body for receiving electrical components and a box cover.

3. The junction box of claim 2, wherein said breather valve is mounted on said lid.

4. The junction box of claim 2, wherein at least one side of said box body is mounted with said condensation resistant water-tight fitting.

5. The junction box of claim 2, wherein a transparent window is provided on the box cover, and one end of the transparent window is rotatably connected to the box cover.

6. The junction box of claim 2, wherein a gasket is disposed between the box body and the box cover.

7. The junction box of any of claims 1-6, wherein the breather valve is a one-way valve or a cold flow exhalation valve.

8. The junction box of claim 1, wherein a female screw cap is attached to one side of said female end, and a front cap is attached to the other end of said female screw cap that is attached to said female end, said front cap being attached to said body.

9. The junction box of claim 1, wherein a male end screw cap is attached to one side of the male end, and a rear end cap is attached to the other end of the male end screw cap that is attached to the male end.