Network side cabinet with high electromagnetic shielding effectiveness

Abstract

The invention discloses a network side cabinet with high electromagnetic shielding effectiveness, and relates to the field of electric locomotives, the network side cabinet comprises a cabinet body and an overhaul door plate, the cabinet body is provided with an overhaul hole, the overhaul door plate is hinged to the cabinet body and located at the overhaul hole, and the cabinet body is provided with a grounding point. The cabinet body is provided with a first shielding body, the first shielding body is located at the edge of the maintenance hole, the edge of the maintenance door plate is connected with a second shielding body, a shielding protrusion is formed on the first shielding body, a shielding groove is formed in the second shielding body, and when the maintenance door plate seals the maintenance hole, the first shielding body is located at the edge of the maintenance hole. According to the electric locomotive network side cabinet, the first shielding body and the second shielding body abut against each other, and the shielding protrusion is embedded into the shielding groove, so that the sealing performance of the edge of the maintenance hole is improved through the first shielding body and the second shielding body when the maintenance hole is sealed by the maintenance door plate, and the electromagnetic shielding performance of the electric locomotive network side cabinet is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric locomotive, more particularly, to a net side cabinet with high electromagnetic shielding efficiency. BACKGROUND

[0002] The environment of electric locomotive is complex and changeable. In order to reduce the influence of high altitude, high cold, haze and other environments on the discharge of high voltage electrical appliances, the arrangement of 25kV high voltage electrical equipment on the roof of the electric locomotive is adjusted. The primary equipment such as vacuum circuit breaker, grounding switch, high voltage mutual inductor and arrester is integrated in the net side cabinet. The net side cabinet is arranged in the mechanical room of the electric locomotive. The high voltage equipment is moved from the roof to the mechanical room, which causes great changes in the electromagnetic environment of the mechanical room of the electric locomotive.

[0003] In order to avoid the interference between the top of the cabinet and the roof of the vehicle during installation of the net side cabinet, a certain installation allowance is left between the two. Electromagnetic waves can be radiated from the gap to the mechanical room. In addition, in order to facilitate the maintenance and repair of the high voltage equipment in the net side cabinet, two safety protection maintenance doors are arranged on the front of the net side cabinet. Due to the processing technology and installation error, there is a certain gap between the cabinet body of the net side cabinet and the maintenance door. Electromagnetic waves may leak through the gap of the maintenance door of the net side cabinet. The above situations will make the low voltage equipment and electronic devices around the net side cabinet work in a poor electromagnetic environment for a long time, and even cause electromagnetic interference to sensitive equipment, affecting the safe operation of the vehicle.

[0004] In summary, how to improve the electromagnetic shielding performance of the net side cabinet of the electric locomotive is a problem to be solved by the technical personnel in the field. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a net side cabinet with high electromagnetic shielding efficiency, which effectively improves the electromagnetic shielding performance of the net side cabinet of the electric locomotive.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] A net side cabinet with high electromagnetic shielding efficiency, comprising a cabinet body and a maintenance door plate, a maintenance hole is formed in the cabinet body, the maintenance door plate is hinged to the cabinet body and located at the maintenance hole, a grounding point is arranged on the cabinet body, a first shielding body is arranged on the cabinet body, the first shielding body is located at the edge of the maintenance hole, a second shielding body is connected to the edge of the maintenance door plate, a shielding protrusion is formed on the first shielding body, a shielding groove is formed on the second shielding body, when the maintenance door plate closes the maintenance hole, the first shielding body and the second shielding body abut and the shielding protrusion is embedded in the shielding groove.

[0008] Preferably, the first shielding body and the second shielding body are both profile steel bending parts, the second shielding body comprises a first bending plate and a second bending plate, the shielding recess is located between the first bending plate and the second bending plate, one side of the first shielding body is integrally formed with an auxiliary wing plate, an auxiliary shielding slot is formed between the auxiliary wing plate and the shielding protrusion, and the auxiliary shielding slot is used for inserting the first bending plate when the access door plate closes the access hole.

[0009] Preferably, the first bending plate and the second bending plate are arranged in the same direction and are inclined, the surface of the auxiliary wing plate is parallel to the surface of the first bending plate and the two surfaces are in contact when the access door plate closes the access hole, and the surface of the side of the shielding protrusion away from the auxiliary wing plate is parallel to the surface of the second bending plate and the two surfaces are in contact.

[0010] Preferably, the second shielding body further comprises an electromagnetic shielding spring piece, the electromagnetic shielding spring piece is clamped on the first bending plate and the second bending plate, the electromagnetic shielding spring piece abuts against the shielding protrusion or the auxiliary wing plate and the electromagnetic shielding spring piece is elastically deformed when the access door plate closes the access hole.

[0011] Preferably, an extension baffle is fixedly connected to the edge of the access hole of the cabinet body, the first shielding body is located on the extension baffle, the edge of the access door plate is bendingly formed with a protection wing plate, the extension baffle is located in the range of the access door plate and the protection wing plate is located between the access door plate and the extension baffle in the projection perpendicular to the surface of the access door plate when the access door plate closes the access hole.

[0012] Preferably, a first grounding nut seat is welded and fixed on the access door plate, and the first grounding nut seat and the grounding point are connected through a wire.

[0013] Preferably, a flange connecting seat is arranged on the top of the electric locomotive, a movable cover plate frame is sleeved on the top of the cabinet body, a fixing member for fixing the movable cover plate frame and the cabinet body relative to each other is arranged on the cabinet body, and a abutting flange edge is fixedly connected to the top of the movable cover plate frame, the flange connecting seat and the abutting flange edge coincide in the vertical projection.

[0014] Preferably, a conductive cloth gasket is arranged between the abutting flange edge and the flange connecting seat, and the conductive cloth gasket abuts against the flange connecting seat.

[0015] Preferably, a stainless steel plate is welded to one side of the abutting flange edge facing the flange connecting seat, and the conductive cloth gasket is fixedly connected to the stainless steel plate.

[0016] Preferably, a second grounding nut seat is welded and fixed on the movable cover plate frame, and the second grounding nut seat and the grounding point are connected through a wire.

[0017] The mesh side cabinet with high electromagnetic shielding efficiency provided by the application, in the state that the maintenance door plate closes the maintenance hole, the first shielding body and the second shielding body abut, thereby sealing the gap between the maintenance door plate and the edge of the maintenance hole, and the shielding protrusion of the first shielding body is embedded into the shielding groove on the second shielding body, so that the contact sealing effect of the first shielding body and the second shielding body is higher, and the unsealing effect is more stable, and the electromagnetic shielding performance of the mesh side cabinet of the electric locomotive is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0019] Figure 1 It is a whole structure schematic diagram for embodying the mesh side cabinet with high electromagnetic shielding efficiency in the embodiments of the present application.

[0020] Figure 2 It is an explosion structure schematic diagram above the movable sealing plate frame in the embodiments of the present application.

[0021] Figure 3 It is a structure side view sectional view schematic diagram of the movable sealing plate frame in the embodiments of the present application.

[0022] Figure 4 It is a cooperation structure schematic diagram of the first shielding body and the second shielding body in the embodiments of the present application.

[0023] Figure 5 It is a structure schematic diagram when the second shielding body includes electromagnetic shielding spring leaf in the embodiments of the present application.

[0024] Figures 1-5 In the drawings, the reference signs include:

[0025] 1, cabinet body; 11, maintenance hole; 12, extension baffle; 13, fixing piece;

[0026] 2, maintenance door plate; 21, protection wing plate; 22, first grounding nut seat;

[0027] 3, movable sealing plate frame; 31, abutting flange edge; 32, stainless steel plate; 33, conductive cloth gasket; 34, connecting waist hole; 35, second grounding nut seat; 36, reinforcing rib plate;

[0028] 4, first shielding body; 41, shielding protrusion; 42, auxiliary wing plate; 43, auxiliary shielding groove;

[0029] 5. Second shielding body; 51, shielding groove; 52, first bent plate; 53, second bent plate; 54, electromagnetic shielding spring piece;

[0030] 6. Flange connecting seat. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those skilled in the art to which the present application belongs. The terms "first", "second" and similar terms used in the present application do not represent any order, number or importance. The terms "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly. The embodiments of the present application disclose a network side cabinet with high electromagnetic shielding efficiency.

[0033] The core of the present application is to provide a network side cabinet with high electromagnetic shielding efficiency.

[0034] Please refer to Figure 1 .

[0035] The network side cabinet with high electromagnetic shielding efficiency provided by the present application comprises a cabinet body 1, a movable sealing plate frame 3 and an inspection door plate 2. The top of the electric locomotive is fixedly connected with a downwardly extending flange connecting seat 6, the cabinet body 1 is located directly below the flange connecting seat 6, and the cabinet body 1 is connected with the flange connecting seat 6 and sealed at the top by the movable sealing plate frame 3. An inspection hole 11 is formed in the cabinet body 1, the inspection door plate 2 is hinged to the cabinet body 1 and located at the inspection hole 11, and the inspection door is used to control the opening or closing of the inspection hole 11.

[0036] As Figure 1 , 2As shown in Figs. 1-3, the cabinet body 1 is in the shape of a square, and the movable sealing plate frame 3 is a square tube formed by welding four L-shaped bent plates end to end. The movable sealing plate frame 3 is arranged on the top of the cabinet body 1 and can move vertically relative to the cabinet body 1. When the movable sealing plate frame 3 moves up and down, the distance between the top of the movable sealing plate frame 3 and the flange connecting seat 6 also changes. The flange connecting seat 6 is also in the shape of a square. The top edge of the movable sealing plate frame 3 is bent to form an abutting flange edge 31. In the vertical projection, the outer edge of the abutting flange edge 31 coincides with the edge of the flange connecting seat 6. A plurality of reinforcing ribs 36 are welded between the abutting flange edge 31 and the side wall of the movable sealing plate frame 3 to improve the stability of the abutting flange edge 31 relative to the movable sealing plate frame 3.

[0037] As shown in Figs. 1-3, Figure 1 , 2 The abutting flange edge 31 and the flange connecting seat 6 are provided with a conductive cloth gasket 33 and a stainless steel plate 32. The conductive cloth gasket 33 and the stainless steel plate 32 are both in the shape of a square and have the same width. The conductive cloth gasket 33 is fixed to one side of the stainless steel plate 32 by a rivet. The side of the stainless steel plate 32 away from the conductive cloth gasket 33 is attached to the abutting flange edge 31 and connected by welding. The outer profile of the stainless steel plate 32 coincides with the abutting flange edge 31, and the inner profile of the stainless steel plate 32 is located inside the abutting flange edge 31. Moving the movable sealing plate frame 3 upward can make the conductive cloth gasket 33 abut the bottom of the flange connecting seat 6. Since the conductive cloth gasket 33 itself has a certain deformation ability, the sealing between the abutting flange edge 31 and the flange connecting seat 6 is relatively high, and the horizontal error between the flange connecting seat 6 and the top of the movable sealing plate frame 3 can also be eliminated to a certain extent.

[0038] As shown in Figs. 1-3, Figure 1 and 2 The cabinet body 1 is provided with a fixing member 13 for fixing the movable sealing plate frame 3 and the cabinet body 1 relative to each other. In this embodiment, the fixing member 13 is a mounting bolt. A plurality of connecting waist holes 34 are formed in the movable sealing plate frame 3 for the mounting bolt to pass through. The plurality of connecting waist holes 34 are evenly arranged around the movable sealing plate frame 3. The length direction of the connecting waist hole 34 is vertical, and a single mounting bolt passes through one connecting waist hole 34. The cabinet body 1 is provided with a threaded hole for the mounting bolt to screw into. The presence of the connecting waist hole 34 allows the movable sealing plate frame 3 to move vertically relative to the mounting bolt by a certain distance. After the movable sealing plate frame 3 moves upward to make the conductive cloth gasket 33 tightly contact the flange connecting seat 6, the mounting bolt is tightened to fix the movable sealing plate frame 3 and the cabinet body 1.

[0039] On the basis of the above embodiment, as shown in Fig. 4, Figure 3 .

[0040] Specifically, the cabinet body 1 is provided with a grounding point (not shown in the figure); a second grounding nut seat 35 is welded and fixed on one side of the movable sealing plate frame 3, and the second grounding nut seat 35 and the grounding point are connected by a wire, thereby ensuring that the movable sealing plate frame 3 is well grounded and has good conductivity.

[0041] On the basis of any one of the above embodiments, as Figure 1 shown.

[0042] Specifically, the number of the access door plates 2 and the number of the access holes 11 in the embodiment are both two, the two access door plates 2 are located on the same side of the cabinet body 1 and arranged left and right, and a single access door plate 2 corresponds to the opening or closing of an access hole 11. The hinge axis of the access door plate 2 is in the vertical direction, that is, the access door plate 2 is flipped horizontally.

[0043] As shown in Figure 1 and 4 , the cabinet body 1 is integrally bent and formed with an extension baffle 12 at the edge of the access hole 11, and the access door plate 2 is integrally bent and formed with a protective wing plate 21 at the edge of the access door plate 2. When the access door plate 2 closes the access hole 11, the protective wing plate 21 is located between the access door plate 2 and the extension baffle 12, and in the projection perpendicular to the plate surface of the access door plate 2, the extension baffle 12 is located within the range of the access door plate 2. Therefore, in the state that the access door plate 2 closes the access hole 11, the access hole 11 does not have a gap in the direction perpendicular to the access door plate 2.

[0044] As shown in Figure 1 and 4 , in the state that the access door plate 2 closes the access hole 11, the inner side surface of the access door plate 2 and the surface of the extension baffle 12 are parallel and have a certain space therebetween. The cabinet body 1 is provided with a first shielding body 4, and the edge of the access door plate 2 is connected with a second shielding body 5. The first shielding body 4 and the second shielding body 5 are located in the space between the access door plate 2 and the extension baffle 12. The first shielding body 4 and the second shielding body 5 are both rectangular frame bodies formed by welding four bent stainless steel profiles end to end. The first shielding body 4 is welded on the side of the extension baffle 12 facing the access door plate 2, and the second shielding body 5 is welded on the side of the access door plate 2 facing the extension baffle 12. In the state that the access door plate 2 closes the access hole 11, the side of the access door plate 2 away from the second shielding body 5 is flush with the outer surface of the cabinet body 1.

[0045] As shown in Figure 4As shown, a shielding protrusion 41 is formed on the first shielding body 4. An auxiliary wing plate 42 is integrally formed on the side of the first shielding body 4 away from the maintenance opening. An auxiliary shielding groove 43 is formed between the auxiliary wing plate 42 and the shielding protrusion 41. The protrusion direction of the shielding protrusion 41 and the groove opening of the auxiliary shielding groove 43 are both facing the maintenance door panel 2. The cross-section of the shielding protrusion 41 is an isosceles trapezoid, and the cross-section of the auxiliary shielding groove 43 is V-shaped. The second shielding body 5 is in the shape of a channel steel, including a first bent plate 52 and a second bent plate 53. A shielding groove 51 is formed between the first bent plate 52 and the second bent plate 53. The groove opening of the shielding groove 51 faces the extension baffle 12.

[0046] like Figure 4 As shown, the first bending plate 52 and the second bending plate 53 are inclined in the same direction, and the edges of the first bending plate 52 and the second bending plate 53 are inclined close to the center of the inspection door panel 2. When the inspection door panel 2 closes the inspection hole 11, the shielding protrusion 41 is embedded in the shielding groove 51, that is, the shielding protrusion 41 is located between the first bending plate 52 and the second bending plate 53, and the first bending plate 52 is inserted into the auxiliary shielding groove 43. The plate surface of the auxiliary wing plate 42 is parallel to the plate surface of the first bending plate 52 and they are in close contact. The side of the shielding protrusion 41 away from the auxiliary wing plate 42 is parallel to the plate surface of the second bending plate 53 and they are in contact.

[0047] In its natural state, the tilt angles of the first bending plate 52 and the second bending plate 53 are slightly smaller than the tilt angles of the auxiliary wing plate 42 and the side of the shielding protrusion 41 away from the auxiliary wing plate 42, respectively. This causes the structures of the first shielding body 4 and the second shielding body 5 to undergo elastic deformation when they come into contact with each other, and they are always in a state of elastic potential energy when they come into contact with each other, thereby improving the sealing between the first shielding body 4 and the second shielding body 5.

[0048] In another specific implementation, such as Figure 5 As shown.

[0049] Specifically, the second shielding body 5 further comprises electromagnetic shielding springs 54, one for each of the first bending plate 52 and the second bending plate 53, and the edge of the electromagnetic shielding spring 54 is provided with a U-shaped bending structure, and the electromagnetic shielding spring 54 is clamped to the edge of the first bending plate 52 or the second bending plate 53 through the U-shaped bending structure. The main body of the electromagnetic shielding spring 54 on the first bending plate 52 is located on the side away from the shielding groove 51, and the main body of the electromagnetic shielding spring 54 on the second bending plate 53 is located in the shielding groove 51. When the access hole plate 2 closes the access hole 11, the electromagnetic shielding spring 54 on the first bending plate 52 abuts against the auxiliary wing plate 42, the electromagnetic shielding spring 54 on the second bending plate 53 abuts against the shielding protrusion 41, and each electromagnetic shielding spring 54 is elastically deformed, thereby ensuring high adhesion at the abutment position, reducing the formation of gaps, and improving the electromagnetic shielding effect.

[0050] On the basis of any one of the above embodiments, with reference to Figure 1 .

[0051] Specifically, the two access hole plates 2 are each welded and fixed with a first grounding nut seat 22 on the side facing the inside of the cabinet body 1, and the first grounding nut seat 22 is located on the inside of the access hole plate 2. The first grounding nut seat 22 and the grounding point are also connected by a wire (not shown in the figure), thereby improving the grounding and conductivity of the access hole plate 2, thereby improving the overall shielding performance of the network side cabinet.

[0052] The network side cabinet with high electromagnetic shielding efficiency described above effectively improves the electromagnetic shielding performance of the network side cabinet of the electric locomotive through the structure of strengthening the sealing at the edge of the access hole 11 and the position between the cabinet body 1 and the flange connecting seat 6.

[0053] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0054] The network side cabinet with high electromagnetic shielding efficiency provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A mesh-side cabinet with high electromagnetic shielding efficiency, comprising a cabinet body (1) and an inspection door (2), wherein the cabinet body (1) has an inspection hole (11), the inspection door (2) is hinged to the cabinet body (1) and located at the inspection hole (11), and the cabinet body (1) has a grounding point, characterized in that, The cabinet body (1) is provided with a first shield (4), which is located at the edge of the inspection hole (11). The edge of the inspection door (2) is connected to a second shield (5). A shielding protrusion (41) is formed on the first shield (4), and a shielding groove (51) is formed on the second shield (5). When the inspection door (2) closes the inspection hole (11), the first shield (4) and the second shield (5) abut against each other and the shielding protrusion (41) is embedded in the shielding groove (51).

2. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 1, characterized in that, The first shield (4) and the second shield (5) are both steel bending parts. The second shield (5) includes a first bending plate (52) and a second bending plate (53). The shielding groove (51) is located between the first bending plate (52) and the second bending plate (53). An auxiliary wing plate (42) is integrally formed on one side of the first shield (4). An auxiliary shielding groove (43) is formed between the auxiliary wing plate (42) and the shielding protrusion (41). When the inspection door (2) closes the inspection hole (11), the auxiliary shielding groove (43) allows the first bending plate (52) to be inserted.

3. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 2, characterized in that, The first bending plate (52) and the second bending plate (53) are inclined in the same direction. When the inspection door plate (2) closes the inspection hole (11), the plate surface of the auxiliary wing plate (42) and the plate surface of the first bending plate (52) are parallel and in contact. The side of the shielding protrusion (41) away from the auxiliary wing plate (42) is parallel and in contact with the plate surface of the second bending plate (53).

4. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 2 or 3, characterized in that, The second shielding body (5) also includes an electromagnetic shielding spring (54), which is snapped onto the first bending plate (52) and the second bending plate (53). When the inspection door panel (2) closes the inspection hole (11), the electromagnetic shielding spring (54) abuts against the shielding protrusion (41) or the auxiliary wing plate (42), and the electromagnetic shielding spring (54) undergoes elastic deformation.

5. The mesh-side cabinet with high electromagnetic shielding effectiveness according to any one of claims 1-3, characterized in that, An extension baffle (12) is fixedly connected to the edge of the inspection hole (11) of the cabinet body (1). The first shield (4) is located on the extension baffle (12). The edge of the inspection door panel (2) is bent into a protective wing plate (21). When the inspection door panel (2) closes the inspection hole (11), the extension baffle (12) is located within the range of the inspection door panel (2) along the projection perpendicular to the surface of the inspection door panel (2). The protective wing plate (21) is located between the inspection door panel (2) and the extension baffle (12).

6. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 1, characterized in that, The inspection door panel (2) is welded and fixed with a first grounding nut seat (22), and the first grounding nut seat (22) and the grounding point are connected by a wire.

7. The mesh-side cabinet with high electromagnetic shielding effectiveness according to any one of claims 1-3 or 6, characterized in that, The electric locomotive is provided with a flange connection seat (6) on the top. The cabinet body (1) is fitted with a movable sealing plate frame (3) on the top. The cabinet body (1) is provided with a fixing member (13) for fixing the movable sealing plate frame (3) and the cabinet body (1) relative to each other. The top of the movable sealing plate frame (3) is fixedly connected to an abutting flange edge (31). In the vertical projection, the flange connection seat (6) and the abutting flange edge (31) coincide.

8. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 7, characterized in that, A conductive cloth gasket (33) is provided between the abutting flange edge (31) and the flange connecting seat (6), and the conductive cloth gasket (33) abuts against the flange connecting seat (6).

9. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 8, characterized in that, A stainless steel plate (32) is welded to the side of the abutting flange edge (31) facing the flange connection seat (6), and the conductive cloth gasket (33) and the stainless steel plate (32) are fixedly connected.

10. The mesh-side cabinet with high electromagnetic shielding effectiveness according to claim 7, characterized in that, The movable sealing plate frame (3) is welded and fixed with a second grounding nut seat (35), and the second grounding nut seat (35) and the grounding point are connected by a wire.

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