CN218828953U

CN218828953U - Explosion-proof terminal box convenient to overhaul

Info

Publication number: CN218828953U
Application number: CN202222031858.7U
Authority: CN
Inventors: 曹永敢
Original assignee: Anhui Feice Technology Co ltd
Current assignee: Anhui Feice Technology Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-04-07
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses an explosion-proof terminal box convenient to overhaul, including box body, top cap, threading pipe, sealed detection device, the threading pipe has two at least, and the threading pipe sets up on the box body, and the tip of threading pipe sets up the wire closing cap, and the top cap seals fixed mounting at the box body top, forms sealed space in the box body, sealed detection device includes the inner tube that fixedly mounted in the box body and extend towards inboard level, through the micro-gap switch of connecting rod fixed mounting in the inner of inner tube, the support plate of slidable mounting in the inner tube, the contact that fixedly mounted on the support plate and used for triggering micro-gap switch, the flexible pipe of ripple of sealing connection between the inner of inner tube and support plate; the microswitch is connected with the alarm device; inert gas is filled into the box body to ensure positive pressure, and the corrugated expansion pipe extends; on the contrary, the corrugated expansion pipe is shortened, the contact triggers the micro switch, the alarm device sends out an alarm signal, and the bottom of the box body is provided with a one-way inflation valve used for inflating inert gas towards the inside of the box body.

Description

Explosion-proof terminal box convenient to overhaul

Technical Field

The utility model relates to a terminal box field specifically is an explosion-proof terminal box of easy access type.

Background

The junction box is one of electrical accessories, because an electric wire for decoration passes through an electric wire pipe, the junction box is used as a transition part at a joint part of the electric wire (such as a long line or a corner of the electric wire pipe), the electric wire pipe is connected with the junction box, the electric wire in the electric wire pipe is connected in the junction box to play a role in protecting the electric wire and the electric wire, explosion refers to the junction box which can resist the impact force and heat of explosion and can still normally work without loss, namely explosion prevention, the explosion prevention is considered from three necessary conditions, one of the necessary conditions is limited, the explosion generation is limited, the explosion prevention junction box is suitable for a flammable dust environment, the current junction box is mainly sealed by a sealing ring, but the explosion prevention junction box is in a severe working environment for a long time, the aging speed of the sealing ring is high, leakage risk still exists after long-term use, external dust enters the junction box and is deposited at the joint part of the electric wire, and potential safety hazards are easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof terminal box of easy to overhaul type to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an easy-to-overhaul explosion-proof junction box comprises a box body, a top cover, at least two threading pipes and a sealing detection device, wherein the threading pipes are arranged on the box body, the end parts of the threading pipes are provided with wire sealing covers, the top cover is fixedly arranged at the top of the box body in a sealing manner, a sealing space is formed in the box body, the sealing detection device comprises an inner pipe which is fixedly arranged in the box body and horizontally extends towards the inner side, a micro switch which is fixedly arranged at the inner end of the inner pipe through a connecting rod, a support plate which is arranged in the inner pipe in a sliding manner, a contact which is fixedly arranged on the support plate and used for triggering the micro switch, and a corrugated expansion pipe which is connected between the inner end of the inner pipe and the support plate in a sealing manner; the microswitch is connected with the alarm device; inert gas is filled into the box body to ensure positive pressure, and the corrugated expansion pipe extends; on the contrary, the corrugated expansion pipe is shortened, the contact triggers the micro switch, and the alarm device sends out an alarm signal.

As a further aspect of the present invention: the bottom of the box body is provided with a one-way inflation valve used for inflating inert gas towards the inside of the box body.

As a further aspect of the present invention: the inert gas is carbon dioxide.

As a further aspect of the present invention: a first sealing ring is fixedly arranged between the box body and the top cover.

As a further aspect of the present invention: the outer end of the inner tube forms an opening on the box body, and a sealing net is fixedly arranged at the opening where the inner tube is connected with the box body.

As a further aspect of the present invention: and both ends of the threading pipe are provided with wire sealing covers.

As a further aspect of the present invention: the wire closing cap has a tub portion, and the tip of tub portion forms the rim of outside extension, tub portion inner wall fixed mounting has the sealing ring, set up the second sealing washer between rim and the threading pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has the advantages of simple structure, high durability and convenient use, fill into inert gas in order to guarantee the malleation in the sealed cavity of box body, the flexible pipe extension of ripple of sealed detection device, alarm device sends alarm information before, all be in the malleation state in the box body, even under the circumstances that the leakproofness descends, outside dust also can't get into in the box body through revealing, the effect of stopping has been played, it is the same to inside and outside when the box body internal atmospheric pressure descends, alarm device sends the warning promptly, even remind the user's inspection, and then reduce the potential safety hazard by a wide margin, improve the convenience of overhauing and examining.

Drawings

FIG. 1 is a schematic structural view of an easy-to-service explosion-proof junction box;

FIG. 2 is a schematic structural diagram of a sealing detection device in an easy-to-overhaul explosion-proof junction box;

FIG. 3 is a schematic view of the installation of a wire cover in an easy-to-service explosion-proof junction box;

in the figure: the device comprises a box body 1, a top cover 2, a sealing detection device 3, an inner tube 31, a corrugated expansion tube 32, a contact 33, a microswitch 34, a connecting rod 35, a carrier plate 36, a sealing net 37, an alarm device 4, a threading tube 5, a one-way inflation valve 6, a wiring terminal 7, a bolt 8, a first sealing ring 9, a lead sealing cover 10, a tube part 101, a ring edge 102, a second sealing ring 103, a sealing ring 104 and a lead 11.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1 to 3, in the present embodiment, a maintenance-convenient explosion-proof junction box includes a box body 1, a top cover 2, a threading tube 5, a sealing detection device 3 and a connection terminal 7, where there are at least two threading tubes 5, at least two wires 11 to be wired pass through the threading tube 5 to the box body 1, ends of the wires 11 are connected to the connection terminal 7 to complete connection of the wires 11, ends of the threading tubes 5 are provided with wire 11 covers 10, the wires 11 pass through the wire 11 covers 10 and the threading tube 5 to the inside of the box body 1, the wire 11 covers 10 are fixed at one end of the threading tube 5, and the threading tube 5 and the wires 11 are sealed. Top cap 2 passes through 8 sealed fixed mounting at box body 1 tops of bolt to form the confined space in making box body 1, outside flammable and explosive dust impurity can't get into box body 1 in, guarantee wiring safety.

Sealed detection device 3 sets up in box body 1 for detect 1 inside seal of box body, when the seal in box body 1 suffers destruction, then send alarm information, carry out safety inspection to the terminal box with providing the user, and then reduce the risk of potential safety hazard by a wide margin.

Specifically, the sealing detection device 3 includes an inner tube 31 fixedly installed in the box body 1 and extending horizontally toward the inside, a micro switch 34 fixedly installed at the inner end of the inner tube 31 through a connecting rod 35, a carrier plate 36 slidably installed in the inner tube 31, a contact 33 fixedly installed on the carrier plate 36 and used for triggering the micro switch 34, and a bellows 32 connected between the inner end of the inner tube 31 and the carrier plate 36 in a sealing manner and capable of expanding and contracting. The microswitch 34 is connected with the alarm device 4, and when the microswitch 34 is triggered, the alarm device 4 sends out an alarm signal.

The inner tube 31 is horizontally arranged on the box body 1 and extends inwards, the support plate 36 is slidably mounted in the inner tube 31, the support plate 36 and the inner end of the inner tube 31 are hermetically connected with the corrugated expansion tube 32, so that the box body 1, the inner tube 31 and the corrugated expansion tube 32 jointly enclose a sealed cavity, the corrugated expansion tube 32 can expand and contract along with the air pressure in the sealed cavity, and the bottom of the box body 1 is provided with a one-way inflation valve 6 for filling inert gas into the box body 1. For example, carbon dioxide gas is flushed into the sealed space of the cartridge body 1 and brought to a positive pressure state, so that the bellows 32 is extended to the maximum length. When the tightness of the box body 1 is in problem and the internal pressure is released, the corrugated expansion pipe 32 can retract under the self elastic reset effect while releasing the pressure, when the air pressure inside and outside the box body 1 is approximately the same, the corrugated expansion pipe 32 completely resets, and the contact 33 continuously approaches to the micro switch 34 and is triggered, so that the alarm device 4 sends out alarm information.

Through the setting, alarm device 4 all is in the malleation state in the box body 1 before sending alarm information, even under the circumstances that the leakproofness descends, outside dust also can't get into in the box body 1 through revealing, has played and has hindered but the effect. When the air pressure in the box body 1 is reduced to the inside and the outside, the alarm device 4 gives an alarm, so that the user can be reminded to check, and the potential safety hazard is greatly reduced.

It should be reminded that the alarm device 4 may adopt the prior art, such as a common sound and light alarm device 4, or adopt an alarm device 4 capable of sending a remote prompt message to the user.

In this embodiment, the first sealing ring 9 is fixedly arranged between the box body 1 and the top cover 2, so that the sealing performance between the box body 1 and the top cover 2 is improved.

In this embodiment, preferably, the outer end of the inner tube 31 forms an opening on the box body 1, and a sealing net 37 is fixedly installed at the opening where the inner tube 31 is connected with the box body 1. The screen 37 is used to prevent foreign materials from entering the inner tube 31, and avoid affecting the sliding smoothness of the carrier plate 36.

In this embodiment, preferably, two ends of the threading tube 5 are each provided with a wire 11 cap 10, the wire 11 cap 10 has a tube 101 through which the wire 11 passes, an outwardly extending flange 102 is formed at an end of the tube 101, a sealing ring 104 is fixedly mounted on an inner wall of the tube 101, and a second sealing ring 103 is disposed between the flange 102 and the threading tube 5. By arranging the two lead wires 11 to cover the pipe 10, arranging the sealing ring in the pipe part 101 of the lead wire 11 to cover the pipe 10, and arranging the second sealing ring 103 between the end surface of the ring edge 102 and the threading pipe 5, the sealing performance between the lead wire 11 and the threading pipe 5 can be improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" or "comprising 8230; \8230;" does not exclude the presence of additional elements in a process, method, article, or terminal device that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

Although the embodiments have been described, once the basic inventive concept is known, other changes and modifications can be made to the embodiments by those skilled in the art, so that the above embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all the modifications of the equivalent structure or equivalent flow path using the contents of the specification and the drawings of the present invention, or directly or indirectly using other related technical fields are also included in the scope of the present invention.

Claims

1. The utility model provides an explosion-proof terminal box of type convenient to overhaul, includes box body, top cap, threading pipe, sealed detection device, the threading pipe has two its characterized in that at least: the wire threading pipe is arranged on the box body, the end part of the wire threading pipe is provided with a wire sealing cover, the top cover is fixedly and hermetically arranged at the top of the box body, a sealed space is formed in the box body, the sealing detection device comprises an inner pipe which is fixedly arranged in the box body and horizontally extends towards the inner side, a micro switch which is fixedly arranged at the inner end of the inner pipe through a connecting rod, a support plate which is slidably arranged in the inner pipe, a contact which is fixedly arranged on the support plate and used for triggering the micro switch, and a corrugated expansion pipe which is hermetically connected between the inner end of the inner pipe and the support plate; the microswitch is connected with the alarm device; inert gas is filled into the box body to ensure positive pressure, and the corrugated expansion pipe extends; on the contrary, the corrugated expansion pipe is shortened, the contact triggers the micro switch, and the alarm device sends out an alarm signal.

2. The explosion-proof terminal box of easy-to-service type of claim 1, wherein: the bottom of the box body is provided with a one-way inflation valve used for inflating inert gas towards the inside of the box body.

3. The easy-to-service explosion-proof junction box of claim 1, wherein: the inert gas is carbon dioxide.

4. The explosion-proof terminal box of easy-to-service type of claim 1, wherein: a first sealing ring is fixedly arranged between the box body and the top cover.

5. The explosion-proof terminal box of easy-to-service type of claim 1, wherein: the outer end of the inner tube forms an opening on the box body, and a sealing net is fixedly arranged at the opening where the inner tube is connected with the box body.

6. The explosion-proof terminal box of easy-to-service type of claim 1, wherein: and both ends of the threading pipe are provided with wire sealing covers.

7. The explosion-proof terminal box of easy-to-service type of claim 1, wherein: the wire closing cap has a tub portion, and the tip of tub portion forms the rim of outside extension, tub portion inner wall fixed mounting has the sealing ring, set up the second sealing washer between rim and the threading pipe.