CN113365454B

CN113365454B - Protective device for network isolation device

Info

Publication number: CN113365454B
Application number: CN202110436820.5A
Authority: CN
Inventors: 姚灏; 叶其革; 唐宗顺; 严晓玲; 张德方; 梁德敏; 叶驰
Original assignee: Guangzhou Electric Power Design Institute Co ltd
Current assignee: Guangzhou Electric Power Design Institute Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-12-27
Anticipated expiration: 2041-04-22
Also published as: CN113365454A

Abstract

The invention discloses a protection device for a network isolation device, which comprises a protection box and a first protection assembly, wherein the first protection assembly comprises a fixed plate, a cover body and a telescopic device, the fixed plate is fixed in the protection box and matched with the protection box to form a protection cavity, the protection cavity is used for placing the network isolation device, the cover body is covered on the protection box, and two ends of the telescopic device are respectively connected with the fixed plate and the cover body. The fixed plate is fixed in the inside formation protection chamber of protective housing, so as to be used for placing network isolating device, when the outside produces the striking or causes vibrations to the top of protective housing, the lid plays the effect of keeping out striking or vibrations, and the expansion bend plays the effect that the roof pressure lid helps to resist external force, broken as the lid, then the fixed plate can continue to resist external force, further protect network isolating device, thereby play the effect of protecting layer upon layer, and reduce because striking or vibrations bring the possibility of potential safety hazard for network isolating device, and then guarantee network isolating device's normal operating.

Description

Protective device for network isolation device

Technical Field

The invention relates to the technical field of network isolation, in particular to a protection device for a network isolation device.

Background

The network consists of a plurality of nodes and links for connecting the nodes, and the network isolation technology means that two or more computers or networks realize information exchange and resource sharing on the basis of disconnection. The network isolation means that two or more routable networks exchange data through a non-routable protocol to achieve the purpose of isolation.

When the network safety isolation device of the industrial control network is used or transported, the network safety isolation device is easily impacted by foreign objects, so that the normal use of the network safety isolation device is influenced; when the network safety isolation device is used in an earthquake frequent region, the network safety isolation device is usually in an unstable state, so that the normal use of the network safety isolation device is influenced, and certain potential safety hazards are also caused.

Disclosure of Invention

Based on this, there is a need to provide a protection device for a network isolated device; this a protector for network isolating device can protect the normal use of network isolating device when receiving striking or vibrations to reduce the potential safety hazard.

The technical scheme is as follows:

one embodiment provides a guard for a network isolated device, comprising:

a protective box; and

the first protection assembly comprises a fixed plate, a cover body and an expansion piece, the fixed plate is fixed in the protection box and is matched with the protection box to form a protection cavity, the protection cavity is used for placing a network isolation device, the cover body is arranged on the protection box in a covering mode and is located on the outer side of the protection box, and two ends of the expansion piece are connected with the fixed plate and the cover body respectively;

the protection device for the network isolation device further comprises a third protection component, the third protection component is arranged between the bottom of the protection box and the network isolation device, and the third protection component is used for buffering the movement of the network isolation device in the protection cavity;

the inner side bottom wall of the protection box is provided with a mounting groove, the third protection assembly comprises a mounting frame, a plurality of swing plates and a first elastic piece, the mounting frame is fixed in the mounting groove, the swing plates are rotatably arranged on the mounting frame, the swing plates are arranged at intervals, and the upper ends of at least one part of the swing plates are abutted to the bottom of the network isolation device; the protection box is provided with a first side wall and a second side wall which are opposite, the swinging plates are arranged in a row and are inclined towards the first side wall to form a first plate group, and the swinging plates are arranged in a row and are inclined towards the second side wall to form a second plate group; the first elastic pieces are arranged in a plurality of numbers, and the first elastic pieces are arranged between every two adjacent swinging plates.

Above-mentioned a protector for network isolating device, the inside formation protection chamber at the protective housing is fixed to the fixed plate, in order to be used for placing network isolating device, when the outside produces the striking or causes vibrations to the top of protective housing, the lid plays the effect of keeping out striking or vibrations, and the expansion bend plays the effect that the roof pressure lid help resists external effort, when the lid is broken, then the fixed plate can continue to resist external effort, further protect network isolating device, thereby play the effect of protecting layer upon layer, and reduce because striking or vibrations bring the possibility of potential safety hazard for network isolating device, and then guarantee network isolating device's normal operating.

The technical solution is further explained below:

in one embodiment, the cover body covers the top of the protection box, the cover body is arranged in a protruding mode, the cover body is arranged towards one side of the top of the protection box in a protruding mode, and the upper end of the telescopic device is connected with the middle of the cover body.

In one embodiment, the cover body comprises top plates and connecting pieces, one end of each top plate is rotatably connected with the protective box or one end of each top plate is rotatably connected with the fixing plate, the number of the top plates is at least three, the connecting pieces have elasticity, and the connecting pieces are arranged between every two adjacent top plates to form the protruding cover body;

the first protection assembly further comprises a spring, one end of the spring is fixed with the fixing plate, and the other end of the spring faces the network isolation device; the springs are at least two and are arranged at intervals.

In one embodiment, the protection device for the network isolation device further comprises a second protection component, wherein the second protection component comprises an air bag positioned in the protection cavity, and the air bag abuts between the network isolation device and the inner wall of the protection box.

In one embodiment, at least two air bags are arranged on different sides of the network isolation device;

the second protection assembly further comprises at least two first air pipes which correspond to the air bags one to one, the expansion pieces are pneumatic push rods, and the pneumatic push rods are provided with second air pipes used for introducing air sources; one end of the first air pipe is communicated with the corresponding air bag, and the other end of the first air pipe is communicated with the second air pipe.

In one embodiment, the first elastic member is a tension spring; or/and the mounting rack is a cross frame or a cross rod.

In one embodiment, the swing plate is pivotally attached at its middle portion to the mounting bracket.

In one embodiment, the third protection assembly further includes a second elastic member, the second elastic member is disposed in a band shape, the second elastic member is connected in series with all the swing plates, and the second elastic member and the first elastic member are respectively located at two opposite sides of the mounting frame.

In one embodiment, the air bag abutting against the first side wall is a first air bag, and the air bag abutting against the second side wall is a second air bag;

at least one of the swinging plates of the first plate group is a first abutting plate, and the upper end of the first abutting plate abuts against the first air bag;

at least one of the swing plates of the second plate group is a second abutting plate, and the upper end of the second abutting plate abuts against the second air bag.

In one embodiment, the third protection component further comprises a first abutting seat, the first abutting seat is arranged at the upper end of the first abutting plate, the first abutting seat is provided with a first curved groove, the first curved groove is arranged corresponding to the first air bag, and the first abutting seat is in abutting fit with the first air bag through the first curved groove;

the third protection component further comprises a second abutting seat, the second abutting seat is arranged at the upper end of the second abutting plate, a second curved surface groove is formed in the second abutting seat, the second curved surface groove corresponds to the second air bag, and the second abutting seat is matched with the second air bag in an abutting mode through the second curved surface groove.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the figures are not drawn to scale with 1:1, and the relative sizes of the various elements in the figures are drawn for illustration only, and not necessarily to true scale.

FIG. 1 is a cross-sectional view of the overall structure of a guard for a network isolation device in one embodiment;

FIG. 2 is an enlarged view of a portion A of the protection device for the network isolation device in the embodiment of FIG. 1;

FIG. 3 is an enlarged view of a portion B of the protection device for the network isolation device in the embodiment of FIG. 1;

FIG. 4 is another cross-sectional view of a protective device for a network isolation device of the embodiment of FIG. 1;

FIG. 5 is an enlarged view of a portion C of the guard for the network isolation device of the embodiment of FIG. 4;

FIG. 6 is an enlarged view of a portion D of the protection device for the network isolation device in the embodiment of FIG. 4;

fig. 7 is a schematic structural diagram of a cover body of the protection device for the network isolation device in the embodiment of fig. 1.

Reference is made to the accompanying drawings in which:

100. a protective box; 110. mounting grooves; 120. a protection cavity; 210. a fixing plate; 220. a cover body; 221. a top plate; 222. a connecting member; 223. a top block; 230. a retractor; 240. a spring; 250. a triangular block; 300. an air bag; 400. a third protection component; 410. a mounting frame; 420. a swing plate; 421. a first butt joint plate; 422. a first abutting seat; 430. a first elastic member; 440. a second elastic member; 500. a network isolation device.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 4, an embodiment provides a protection device for a network isolation device 500, including a protection box 100 and a first protection component, where the first protection component includes a fixing plate 210, a cover 220 and an expansion piece 230, the fixing plate 210 is fixed in the protection box 100 and is matched with the protection box 100 to form a protection cavity 120, the protection cavity 120 is used for placing the network isolation device 500, the cover 220 is covered on the protection box 100, the cover 220 is located outside the protection box 100, and two ends of the expansion piece 230 are respectively connected with the fixing plate 210 and the cover 220.

This a protector for network isolating device 500, fixed plate 210 is fixed and is formed protection cavity 120 in the inside of protective housing 100, in order to be used for placing network isolating device 500, when the outside produces the striking or causes vibrations to the top of protective housing 100, lid 220 plays the effect of keeping out striking or vibrations, and expansion bend 230 plays the effect of roof pressure lid 220 help resisting external effort, when lid 220 is broken, then fixed plate 210 can continue to resist external effort, further protect network isolating device 500, thereby play the effect of layer upon layer protection, and reduce because striking or vibrations bring the possibility of potential safety hazard for network isolating device 500, and then guarantee network isolating device 500's normal operating.

In one embodiment, referring to fig. 1 and 4, the cover 220 covers the top of the protection box 100, the cover 220 is protruded toward one side of the top of the protection box 100, and the upper end of the expansion piece 230 is connected to the middle of the cover 220.

As shown in fig. 1 and 4, the cover 220 is protruded toward the top of the protection box 100, when an object on the upper side is about to impact or bump the protection box 100, the protruded structure can effectively press against the striker, and the movement track of the striker is easily changed when the protruded structure contacts with the striker, so that the striker is finally avoided.

In one embodiment, referring to fig. 7, the cover 220 includes a top plate 221 and at least three connecting members 222, one end of the top plate 221 is rotatably connected to the protective box 100 or one end of the top plate 221 is rotatably connected to the fixing plate 210, the connecting members 222 are elastic, and the connecting members 222 are disposed between adjacent top plates 221 to form the protruding cover 220.

When the striker impacts the cover 220, the top plate 221 can swing, thereby playing a role in buffering the impact force of the striker; meanwhile, the cover body 220 is arranged in a protruding mode, so that the moving track of the impactor can be changed, and the impactor is avoided or popped up; in addition, the top plate 221 is vibrated when being impacted, thereby generating vibration, and further shaking off dust or impurities on the cover 220 by the vibration, thereby having self-cleaning capability; furthermore, the connecting member 222 has elasticity, so that when the adjacent top plates 221 swing, although the position between the adjacent top plates 221 may change, the integrity of the whole cover 220 can be maintained, and the cover is not loosened or separated, which is not described in detail.

Optionally, the cover 220 further includes a top block 223, the top block 223 is located at a top middle position of the cover 220, an upper end of the retractor 230 is fixed to the top block 223, and an upper surface of the top block 223 is connected to a lower surface of the top plate 221 through a connecting member 222, so that the top plate 221 does not interfere with the top plate 221 when swinging. The top block 223 increases the contact area between the retractor 230 and the cover 220, and has a better supporting effect when the retractor 230 supports the cover 220.

In one embodiment, referring to fig. 1 and 4, the first protection assembly further includes a spring 240, one end of the spring 240 is fixed to the fixing plate 210, and the other end of the spring 240 faces the network isolation device 500; the springs 240 are provided in at least two and spaced apart from each other.

In the embodiment shown in fig. 1 and 4, three springs 240 are provided, when the cover 220 is broken by impact, the impact force further impacts the fixing plate 210, and the springs 240 further buffer the force generated by the fixing plate 210, so as to protect the network isolation device 500 from damage to the maximum extent.

In one embodiment, referring to fig. 1 and 4, the protection device for the network isolation device 500 further includes a second protection component, the second protection component includes an air bag 300 located in the protection cavity 120, and the air bag 300 abuts between the network isolation device 500 and the inner wall of the protection box 100.

In one embodiment, referring to fig. 1 and 4, the number of the airbags 300 is at least two, and the airbags 300 are arranged on different sides of the network isolation device 500.

Optionally, the second shielding assembly comprises three airbags 300, the three airbags 300 being respectively arranged at the left, right and rear sides of the network isolation device 500 to provide shielding to the side portions of the network isolation device 500.

In one embodiment, the second protection assembly further comprises a first air tube, the first air tube is provided with at least two air tubes and corresponds to the air bags 300 one by one, the expansion piece 230 is a pneumatic push rod, and the pneumatic push rod is provided with a second air tube for introducing an air source; one end of the first air tube is communicated with the corresponding air bag 300, and the other end of the first air tube is communicated with the second air tube.

When the top receives impact force, expansion piece 230 is compressed and contracted to in passing through second trachea refluence gas to gasbag 300, make gasbag 300 swell and the protection of ready lateral part, simultaneously, after reaching certain degree, the gas in gasbag 300 can again be through first trachea refluence like second trachea and reach expansion piece 230, thereby make expansion piece 230 stretch out, improve the supporting role of expansion piece 230 to lid 220. So configured, the side and top shielding capabilities of the network isolation device 500 are enhanced by the interaction and reaction between the bellows 230 and the bladder 300.

In one embodiment, referring to fig. 1 and 4, the protection device for a network isolation device 500 further includes a third protection component 400, the third protection component 400 is disposed between the bottom of the protection box 100 and the network isolation device 500, and the third protection component 400 is used for buffering the movement of the network isolation device 500 in the protection cavity 120.

In one embodiment, referring to fig. 2 and 5, the inner bottom wall of the protection box 100 is provided with a mounting groove 110, the third protection assembly 400 includes a mounting frame 410, a plurality of swing plates 420 and first elastic members 430, the mounting frame 410 is fixed in the mounting groove 110, the swing plates 420 are rotatably disposed on the mounting frame 410, the swing plates 420 are disposed at intervals, at least a portion of the upper ends of the swing plates 420 abut against the bottom of the network isolation device 500, the first elastic members 430 are disposed at a plurality of positions, and the first elastic members 430 are disposed between adjacent swing plates 420.

As shown in fig. 2, in the embodiment, the inner wall of the protection box 100 is provided with a mounting groove 110, the mounting groove 110 is used for fixing the mounting frame 410 and providing a swing space for the swing plate 420, and the first elastic member 430 may be a tension spring, and two ends of the tension spring are respectively fixed with two adjacent swing plates 420. When the network isolation device 500 moves up and down, the swing plate 420 corresponding to the bottom of the network isolation device 500 swings under pressure, and the swing resistance is increased and the swing amplitude is reduced due to the arrangement of the first elastic member 430 during the swing process, so that the up-and-down movement of the network isolation device 500 is organized, and the motion prevention capability of the network isolation device 500 is realized.

Optionally, the mounting frame 410 is a cross frame or a cross bar, and the mounting frame 410 corresponds to the bottom middle position of the network isolation device 500.

Optionally, a middle portion of the swing plate 420 is pivotally attached to the mounting bracket 410 to allow for swinging movement.

In one embodiment, referring to fig. 1 and 4, the protective box 100 has a first side wall and a second side wall opposite to each other, a plurality of the swing plates 420 are arranged in a row and are all inclined toward the first side wall to form a first plate group (e.g., a plurality of the swing plates 420 are arranged side by side and are arranged in a row to form a first plate group), and a plurality of the swing plates 420 are arranged in a row and are all inclined toward the second side wall to form a second plate group.

As shown in fig. 1 and 4, the swing plates 420 are provided in plural, wherein a portion of the swing plates 420 are all disposed obliquely toward the first side wall on the left side to form a first plate group, and another portion of the swing plates 420 are all disposed obliquely toward the second side wall on the right side to form a second plate group, and the first plate group and the second plate group are arranged in a mirror image manner to provide a better buffering and stopping function for the network isolation device 500.

Referring to fig. 2 and 5, the third protection assembly 400 further includes a second elastic member 440, the second elastic member 440 is disposed in a band shape, the second elastic member 440 is connected in series with all the swing plates 420, and the second elastic member 440 and the first elastic member 430 are respectively located at two opposite sides of the mounting frame 410.

Optionally, the second elastic member 440 is an elastic rope, and the elastic rope connects all the swinging plates 420 in series, and similar to the first elastic member 430, the function of the swinging plates 420 is to realize linkage, and increase the swinging resistance of the swinging plates 420, so as to play a role of buffering and protecting the network isolation device 500.

In the embodiment shown in fig. 2, the first elastic member 430 is located at a lower side of the mounting frame 410, and the first elastic member 430 is located at an upper side of the mounting frame 410.

In one embodiment, referring to fig. 1 and 4, the air bag 300 abutting the first sidewall is a first air bag, and the air bag 300 abutting the second sidewall is a second air bag.

In the embodiment shown in fig. 1 and 4, the air bag 300 located on the left side of the network isolation device 500 is a first air bag, and the air bag 300 located on the right side of the network isolation device 500 is a second air bag.

In one embodiment, referring to fig. 3 and 6, at least one of the swing plates 420 of the first plate set is a first abutting plate 421, and an upper end of the first abutting plate 421 abuts against the first air bag.

As shown in fig. 1 and 4, the two swinging plates 420 are disposed at the outermost side of the first plate group close to the first airbag, the upper ends of the two swinging plates 420 press against the first airbag, and when the swinging plates 420 of the first plate group swing in a linkage manner, the two swinging plates 420 can synchronously press against the first airbag, so as to promote the swelling of the first airbag and reinforce the side protection.

Similarly, in another embodiment, at least one of the swing plates 420 of the second plate group is a second abutting plate, and an upper end of the second abutting plate abuts against the second airbag.

In one embodiment, referring to fig. 3 and fig. 6, the third protection assembly 400 further includes a first abutting seat 422, the first abutting seat 422 is disposed at the upper end of the first abutting plate 421, the first abutting seat 422 is provided with a first curved groove, the first curved groove is disposed corresponding to the first airbag, and the first abutting seat 422 is engaged with the first airbag through the first curved groove.

As shown in fig. 3 and 6, part or all of the first abutting base 422 can be made of an elastic material, and the first curved groove is arranged corresponding to the outer surface of the first airbag to better contact with the first airbag, so as to better extrude the first airbag and improve the side protection capability.

Similarly, in another embodiment, the third protection component 400 further includes a second abutting seat, the second abutting seat is disposed at the upper end of the second abutting plate, the second abutting seat is provided with a second curved groove, the second curved groove is disposed corresponding to the second air bag, and the second abutting seat is in abutting fit with the second air bag through the second curved groove.

So set up, through the comprehensive setting of first protection component, second protection component and third protection component 400 for network isolating device 500 has all obtained good protection in top, lateral part and bottom, ensures network isolating device 500's normal work, and reduces the potential safety hazard.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A guard for a network isolation device, comprising:

a protective box; and

the first protection assembly comprises a fixed plate, a cover body and an expansion piece, the fixed plate is fixed in the protection box and matched with the protection box to form a protection cavity, the protection cavity is used for placing a network isolation device, the cover body covers the protection box, the cover body is positioned on the outer side of the protection box, and two ends of the expansion piece are respectively connected with the fixed plate and the cover body;

the inner side bottom wall of the protection box is provided with a mounting groove, the third protection assembly comprises a mounting rack, a plurality of swinging plates and first elastic pieces, the mounting rack is fixed in the mounting groove, the swinging plates are rotatably arranged on the mounting rack, the swinging plates are arranged at intervals, and the upper ends of at least part of the swinging plates are abutted to the bottom of the network isolation device; the protective box is provided with a first side wall and a second side wall which are opposite, the swinging plates are arranged in rows and are inclined towards the first side wall to form a first plate group, and the swinging plates are arranged in rows and are inclined towards the second side wall to form a second plate group; the first elastic pieces are arranged in a plurality of numbers, and the first elastic pieces are arranged between every two adjacent swinging plates.

2. The protection device for the network isolation device according to claim 1, wherein the cover body covers the top of the protection box, the cover body is arranged in a protruding manner towards one side of the top of the protection box, and the upper end of the expansion piece is connected with the middle of the cover body.

3. The protection device for the network isolation device according to claim 2, wherein the cover body comprises a top plate and at least three connecting members, one end of the top plate is rotatably connected with the protection box or one end of the top plate is rotatably connected with the fixing plate, the connecting members have elasticity, and the connecting members are arranged between the adjacent top plates to form the protruding cover body;

4. A guard for a network isolation device according to any of claims 2 to 3 further comprising a second guard assembly including an air pocket within the protection chamber, the air pocket abutting between the network isolation device and an inner wall of the protection box.

5. The protection device for a network isolation device according to claim 4, wherein the airbags are provided in at least two, and are arranged on different sides of the network isolation device;

the second protection assembly further comprises at least two first air pipes which correspond to the air bags one by one, the expansion piece is a pneumatic push rod, and the pneumatic push rod is provided with a second air pipe used for introducing an air source; one end of the first air pipe is communicated with the corresponding air bag, and the other end of the first air pipe is communicated with the second air pipe.

6. The protection device for the network isolation device of claim 1, wherein the first elastic member is a tension spring; or/and the mounting rack is a cross frame or a cross rod.

7. The guard for a network isolation device of claim 1 wherein the swing plate is pivotally attached at its mid-portion to the mounting bracket.

8. The protective apparatus for a network isolation device of claim 1, wherein the third protective assembly further comprises a second elastic member, the second elastic member is disposed in a band shape, the second elastic member is connected in series with all of the swing plates, and the second elastic member and the first elastic member are respectively located at two opposite sides of the mounting frame.

9. The shielding device for a network isolated device according to claim 1, wherein the air bag abutting the first sidewall is a first air bag, and the air bag abutting the second sidewall is a second air bag;

10. The protection device for the network isolation device according to claim 9, wherein the third protection component further comprises a first abutting seat, the first abutting seat is arranged at the upper end of the first abutting plate, the first abutting seat is provided with a first curved groove, the first curved groove is arranged corresponding to the first air bag, and the first abutting seat is in abutting fit with the first air bag through the first curved groove;