Parallel operation connection structure

Abstract

The utility model relates to the technical field of power equipment, and discloses a parallel connection structure, which is characterized in that a first connection part and a second connection part are respectively arranged on two cabinets, the first connection part is provided with a first parallel channel, the second connection part is provided with a second parallel channel, and the second connection part is inserted into the first parallel channel; and the second parallel channel is communicated with the first parallel channel to form a parallel path of the two cabinets. A first sealing plate is arranged at one end of the first parallel channel in the circumferential direction and extends in the radial direction of the first parallel channel. A first sealing piece is arranged at one end of the second parallel channel in the circumferential direction, and the first sealing piece abuts against the inner wall of the first parallel channel to form sealing; and a second sealing plate is arranged at the other end of the second parallel channel in the circumferential direction, the second sealing plate extends in the radial direction of the second parallel channel, a second sealing piece is arranged between the second sealing plate and the first sealing plate, a sealing and double-sealing structure is formed, and the sealing performance and the waterproof performance after parallel operation are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a parallel connection structure. Background Art

[0002] In the field of power equipment, due to power requirements, there is a need to connect two cabinets in parallel, which can improve the reliability and continuity of the power supply system. For example, two modules need to be connected on a three-level converter. The three-level converter is a device used to control the current in the power system. It converts DC power into AC power by controlling the on and off state of the switching device to achieve precise regulation of the current. There are even multiple units connected in parallel to form a power grid to maintain the stability of the power supply voltage and frequency, which can withstand the impact of large load changes, can be centrally dispatched, and make maintenance and repair convenient and timely, and more economical.

[0003] During the parallel connection process, the connection between the two cabinets is crucial, but the current connection structures have problems with poor sealing and waterproof performance, and there are safety risks such as water leakage. Utility Model Content

[0004] The utility model aims to provide a parallel connection structure, which can form a stable sealing structure, so that the parallel connection part is watertight, and further improves the sealing and waterproof performance after the parallel connection.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The parallel connection structure is used to connect two cabinets, and the parallel connection structure includes:

[0007] A first connection portion, wherein the first connection portion is provided with a first parallel channel, the first connection portion is provided with a first sealing plate along a circumferential direction at one end of the first parallel channel, the first sealing plate extends along a radial direction of the first parallel channel, and the first connection portion is used to be connected to a first cabinet at the other end of the first parallel channel;

[0008] The second connection part is provided with a second parallel channel, the second connection part is provided with a first sealing member along the circumferential direction at one end of the second parallel channel, the second connection part is provided with a second sealing plate along the circumferential direction at the other end of the second parallel channel, and the second sealing plate extends radially along the second parallel channel; part of the second connection part is plugged into the first connection part, the second parallel channel is communicated with the first parallel channel, the first sealing member is pressed against the inner wall of the first parallel channel, the two sides of the second sealing plate are respectively used to fit and connect with the first sealing plate and the side plate of the second cabinet, and a second sealing member is provided between the second sealing plate and the first sealing plate.

[0009] As an optional technical solution for the parallel connection structure, the first connecting part includes a first tube and a second tube arranged coaxially, the inner diameter of the first tube is larger than the inner diameter of the second tube, one end of the first tube is connected to the second tube via a connecting plate, and the first tube and the second tube are arranged to form the first parallel channel; the first sealing plate is circumferentially provided at one end of the first tube away from the second tube, and the first sealing plate extends radially inwardly along the first tube.

[0010] As an optional technical solution for the parallel connection structure, part of the second connection portion is inserted into the first tube, and the first sealing member is pressed against the connection plate.

[0011] As an optional technical solution for the parallel connection structure, the first sealing plate extends to the outer side wall of the second connecting portion disposed in the first parallel channel.

[0012] As an optional technical solution for the parallel connection structure, part of the second connection portion passes through the first tube and is placed in the second tube, and the first sealing member is pressed against the inner wall of the second tube.

[0013] As an optional technical solution for the parallel connection structure, an end of the second tube away from the first tube is circumferentially provided with a mounting flange, the mounting flange extends radially along the second tube, and the mounting flange is fitted and connected to the side panel of the first cabinet.

[0014] As an optional technical solution for the parallel connection structure, the second connecting part includes a third tube, the third tube is provided with the first sealing member along the circumferential direction, the third tube is inserted into the first connecting part, and the end of the third tube away from the first connecting part is provided with the second sealing plate along the circumferential direction, and the second sealing plate extends radially outward along the third tube.

[0015] As an optional technical solution for the parallel connection structure, the first connection portion is welded to the first cabinet, and / or the second connection portion is welded to the second cabinet.

[0016] As an optional technical solution for the parallel connection structure, the parallel connection structure includes a connecting piece, which can pass through the second sealing plate and the second sealing piece in sequence from inside the second cabinet to the outside and be fixedly connected to the first sealing plate.

[0017] As an optional technical solution for the parallel connection structure, the connecting member is a bolt, the first sealing plate is embedded with a blind hole nut, and the bolt is threadedly connected to the blind hole nut.

[0018] Beneficial effects of the utility model:

[0019] The parallel connection structure provided by the utility model includes a first connection part and a second connection part, which are used to connect two cabinets. The first connection part is hollowed out with a first parallel channel, and the first connection part is circumferentially provided with a first sealing plate at one end of the first parallel channel, and the first sealing plate extends radially along the first parallel channel. The first connection part is used to connect with the first cabinet at the other end of the first parallel channel. The second connection part is hollowed out with a second parallel channel, and the second connection part is circumferentially provided with a first sealing member at one end of the second parallel channel. The second connection part is plugged into the first connection part, and the second parallel channel is connected with the first parallel channel to connect the interiors of the two cabinets to form a parallel passage of the two cabinets; the second connection part is circumferentially provided with a second sealing plate at the other end of the second parallel channel, and the second sealing plate extends radially along the second parallel channel. The two sides of the second sealing plate are respectively used to fit and connect with the first sealing plate and the side panels of the second cabinet. A second sealing member is provided between the second sealing plate and the first sealing plate to form a first seal, which can prevent the parallel connection part from leaking; the first sealing member is pressed against the inner wall of the first parallel channel to form a second seal, thus forming a double sealing structure, which further improves the sealing and waterproof performance after parallel connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram from a first viewing angle of a first connecting portion of a parallel connection structure provided in a specific embodiment of the utility model;

[0021] Figure 2 It is a structural diagram from a second perspective of the first connecting portion of the parallel connection structure provided in a specific embodiment of the utility model;

[0022] Figure 3 This is a structural diagram from a first perspective of a second connecting portion and a connecting member of a parallel connection structure provided in a specific embodiment of the utility model;

[0023] Figure 4 It is a structural diagram from a second perspective of a second connecting portion and a connecting member of a parallel connection structure provided by a specific embodiment of the utility model;

[0024] Figure 5 It is an assembly schematic diagram of a parallel connection structure provided by a specific embodiment of the utility model;

[0025] Figure 6 It is a cross-sectional view of the parallel connection structure provided by the specific implementation mode of the utility model;

[0026] Figure 7 yes Figure 6 A magnified view of part A;

[0027] Figure 8 In another embodiment provided by the specific implementation mode of the utility model Figure 6 A magnified view of part A;

[0028] Fig. 9 This is another embodiment provided by the specific implementation method of the utility model. Figure 6 Enlarged view of part A.

[0029] In the figure:

[0030] 100, first connecting portion; 101, first parallel channel; 102, second contact surface; 110, second tube; 120, connecting plate; 130, first tube; 140, first sealing plate; 141, second sealing member; 142, blind hole nut; 150, folding plate; 160, mounting flange;

[0031] 200, second connecting portion; 201, second parallel channel; 210, second sealing plate; 211, first contact surface; 220, third cylinder; 221, first sealing member; 2211, second sealing surface;

[0032] 300. Connectors. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] like Figures 1 to 9 As shown in the figure, the utility model discloses a parallel connection structure for connecting two cabinets, including a first connection part 100 and a second connection part 200. The first connection part 100 is hollowed out with a first parallel channel 101, and the first connection part 100 is provided with a first sealing plate 140 along the circumferential direction at one end of the first parallel channel, and the first sealing plate 140 extends along the radial direction of the first parallel channel 101, and the first connection part 100 is used to connect with the first cabinet at the other end of the first parallel channel. The second connecting part 200 is hollowed out with a second parallel channel 201. The second connecting part 200 is provided with a first sealing member 221 along the circumferential direction at one end of the second parallel channel. Part of the second connecting part 200 is plugged into the first connecting part 100. The second parallel channel 201 is connected with the first parallel channel 101 to connect the insides of the two cabinets, forming a parallel passage of the two cabinets. The second connecting part 200 is provided with a second sealing plate 210 along the circumferential direction at the other end of the second parallel channel. The second sealing plate 210 extends radially along the second parallel channel 201. The two sides of the second sealing plate 210 are respectively used to fit and connect with the first sealing plate 140 and the side plate of the second cabinet. A second sealing member 141 is provided between the second sealing plate 210 and the first sealing plate 140 to form a first seal, which can prevent the parallel connection part from leaking. The first sealing member 221 presses against the inner wall of the first parallel channel 101 to form a second seal, thus forming a double sealing structure, further improving the sealing and waterproof performance after parallel connection.

[0038] Specifically, the first connecting portion 100 includes a first tube 130 and a second tube 110 which are coaxially arranged. The inner diameter of the first tube 130 is larger than the inner diameter of the second tube 110. One end of the first tube 130 is connected to the second tube 110 via a connecting plate 120. The first tube 130 and the second tube 110 are arranged to form a first parallel channel 101. A first sealing plate 140 is circumferentially provided at one end of the first tube 130 away from the second tube 110. The first sealing plate 140 extends radially inwardly along the first tube 130.

[0039] Furthermore, the first connection part 100 is composed of a first sealing plate 140, a first tube 130, a connection plate 120 and a second tube 110 connected in sequence in an integral structure, wherein the connection plate 120 is folded outward along the four sides of the second tube 110, the first sealing plate 140 is provided with a first sealing surface, and a second sealing member 141 is provided on the first sealing surface; one side of the second sealing plate 210 is fitted and connected with the second cabinet, and the other side is provided with a first contact surface 211, and the first contact surface 211 is sealed and connected with the first sealing surface through the second sealing member 141. The first connection part 100 is also provided with a second contact surface 102, and the second contact surface 102 is staggered with the first sealing surface; the second connection part 200 is provided with a first sealing member 221 and is inserted into the first tube 130, the first sealing member 221 is pressed against the connection plate 120, the first sealing member 221 is provided with a second sealing surface 2211, and the second sealing surface 2211 is sealed and connected with the second contact surface 102.

[0040] In a specific implementation of this embodiment, Figure 7 As shown in , the first sealing plate 140 extends to the outer side wall of the second connecting part 200 placed in the first parallel channel 101. The second contact surface 102 is arranged on the connecting plate 120, and the second sealing surface 2211 abuts against the second contact surface 102 on the second connecting member 300, and the first and second sealing are staggered and parallel.

[0041] Furthermore, if Figure 8 As shown in the figure, a folding plate 150 is provided at the end of the first connecting plate 120, and the folding plate 150 extends to the connecting plate 120 along the axial direction of the first tube 130, and the first sealing member 221 is pressed against the folding plate 150. When the connecting plate 120 and the first sealing member 221 are sealed and abutted, the folding plate 150 and the first sealing member 221 are also interference-sealed and fitted, thereby expanding the sealing fitting portion, which can further improve the sealing and waterproof performance of the parallel connection structure.

[0042] In another specific implementation of this embodiment, Fig. 9 As shown, the second contact surface 102 is arranged in the first tube 130, and part of the second connecting part 200 passes through the first tube 130 and is placed in the second tube 110. The first sealing member 221 is pressed against the inner wall of the second tube 110, and the first sealing member 221 and the first tube 130 are interference fit. The second contact surface 102 is arranged on the outermost circle of the first sealing member 221, that is, the first seal and the second seal are vertically arranged, and the sealing is performed from two directions, which further stabilizes the installation of the parallel connection structure, can adapt to temperature changes and air pressure changes in different environments, and to a large extent prevents and ensures that part of the sealing structure can still remain effective when the parallel connection structure is deformed or not assembled in place, thereby expanding the scope of application of the parallel connection structure.

[0043] Specifically, the second connecting part 200 includes a third tube 220, the third tube 220 is provided with a first sealing member 221 along the circumferential direction, the third tube 220 is plugged into the first connecting part 100, and the end of the third tube 220 away from the first connecting part 100 is provided with a second sealing plate 210 along the circumferential direction, the second sealing plate 210 extends radially outward along the third tube 220, and the second connecting part 200 is composed of a second sealing plate 210 and a third tube 220 of an integral structure.

[0044] In this embodiment, the first tube 130 and the second tube 110 are respectively configured as square tubes, and the connecting plate 120 and the first sealing plate 140 are respectively configured as square frames, that is, the first connecting portion 100 is in a "U"-shaped structure; correspondingly, the second sealing plate 210 is configured as a square frame connected to the first sealing plate 140, and the third tube 220 is configured as a square tube that can be inserted from one side of the first tube 130, and the second connecting portion 200 is in a "mouth"-shaped structure. The second sealing member 141 is installed on the outermost side of the first sealing plate 140 so that it is close to the second connecting portion 200; the first sealing member 221 is installed on the third tube 220 so that it is close to the first connecting portion 100, and the sealing structure of the two cabinets in parallel is completed.

[0045] Specific as Figure 3 As shown in FIG, the first sealing member 221 is a sealing ring, and the sealing ring is sleeved on the outer circumference of the third tube 220, so as to better seal and connect the first connecting part 100 and the second connecting part 200 in the circumferential direction.

[0046] Exemplarily, the material of the first seal 221 and / or the second seal 141 can be ethylene propylene diene monomer rubber, also known as EPDM, which is a type of ethylene propylene rubber and has excellent properties such as oxidation resistance, heat resistance, and weather resistance. It can effectively resist aging and corrosion, has a light texture, and has good sealing performance.

[0047] In this embodiment, the parallel connection structure includes a connector 300 , which can sequentially pass through the second sealing plate 210 and the second sealing plate 141 from the inside of the second cabinet to the outside and be fixedly connected to the first sealing plate 140 .

[0048] Specifically, the connecting member 300 is a bolt, and the first sealing plate 140 is embedded with a blind hole nut 142, and the bolt is threadedly connected with the blind hole nut 142. When two cabinets are connected in parallel, the second sealing member 141 on the first sealing plate 140 is pressed against the first contact surface 211 of the second sealing plate 210, and the first connecting part 100 and the second connecting part 200 are screwed and fastened together through the bolt and the blind hole nut 142 from the inside of the cabinet on the side of the second connecting part 200. In the process of gradually tightening the bolt, the first sealing member 221 is gradually extended and pressed on the second contact surface 102 to form a seal, thereby improving the stability of the parallel connection structure.

[0049] In practice, the second tube 110 is sealed and welded with the first cabinet near the first connector 300 to stably connect the first connector 300 to the first cabinet. Alternatively, a mounting flange 160 may be provided along the circumferential direction at one end of the second tube 110 away from the first tube 130, and the mounting flange 160 is fitted and connected to the side plate of the first cabinet. Similarly, a blind nut 142 is provided on the mounting flange 160, and the connector 300 is passed through the inside of the first cabinet and fixedly screwed to the mounting flange 160.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A parallel connection structure is used to connect two cabinets, characterized in that: The parallel connection structure comprises: A first connecting portion (100), the first connecting portion (100) being provided with a first parallel channel (101), the first connecting portion (100) being provided with a first sealing plate (140) along a circumferential direction at one end of the first parallel channel (101), the first sealing plate (140) extending along a radial direction of the first parallel channel (101), the first connecting portion (100) being used to be connected to a first cabinet at the other end of the first parallel channel (101); A second connecting part (200), wherein the second connecting part (200) is provided with a second parallel channel (201), the second connecting part (200) is provided with a first sealing member (221) along the circumferential direction at one end of the second parallel channel (201), and the second connecting part (200) is provided with a second sealing plate (210) along the circumferential direction at the other end of the second parallel channel (201), and the second sealing plate (210) extends radially along the second parallel channel (201); a portion of the second connecting part (200) is plugged into the first connecting part (100), the second parallel channel (201) is communicated with the first parallel channel (101), the first sealing member (221) is pressed against the inner wall of the first parallel channel (101), and the two sides of the second sealing plate (210) are respectively used for being fitted and connected with the first sealing plate (140) and the side plate of the second cabinet, and a second sealing member (141) is provided between the second sealing plate (210) and the first sealing plate (140).

2. The parallel connection structure according to claim 1, characterized in that: The first connecting portion (100) comprises a first tube (130) and a second tube (110) which are coaxially arranged, the inner diameter of the first tube (130) being larger than the inner diameter of the second tube (110), one end of the first tube (130) being connected to the second tube (110) via a connecting plate (120), and the first tube (130) and the second tube (110) are arranged to form the first parallel channel (101); the first sealing plate (140) is circumferentially arranged at one end of the first tube (130) away from the second tube (110), and the first sealing plate (140) extends radially inwardly of the first tube (130).

3. The parallel connection structure according to claim 2, characterized in that: Part of the second connecting portion (200) is inserted into the first tube (130), and the first sealing member (221) is pressed against the connecting plate (120).

4. The parallel connection structure according to claim 3, characterized in that: The first sealing plate (140) extends to the outer side wall of the second connecting portion (200) located in the first parallel channel (101).

5. The parallel connection structure according to claim 2, characterized in that: Part of the second connecting portion (200) passes through the first tube (130) and is placed in the second tube (110), and the first sealing member (221) is pressed against the inner wall of the second tube (110).

6. The parallel connection structure according to claim 2, characterized in that: An installation flange (160) is provided along the circumferential direction at one end of the second tube (110) away from the first tube (130); the installation flange (160) extends along the radial direction of the second tube (110); and the installation flange (160) is fitted and connected to the side panel of the first cabinet.

7. The parallel connection structure according to any one of claims 1 to 6, characterized in that: The second connecting portion (200) includes a third tube (220), and the third tube (220) is provided with the first sealing member (221) along the circumferential direction. The third tube (220) is plugged into the first connecting portion (100), and the end of the third tube (220) away from the first connecting portion (100) is provided with the second sealing plate (210) along the circumferential direction. The second sealing plate (210) extends radially outwardly of the third tube (220).

8. The parallel connection structure according to any one of claims 1 to 6, characterized in that: The first connection portion is welded to the first cabinet, and / or the second connection portion is welded to the second cabinet.

9. The parallel connection structure according to any one of claims 1 to 6, characterized in that: The parallel connection structure also includes a connecting member (300), and the connecting member (300) can pass through the second sealing plate (210) and the second sealing member (141) in sequence from the inside of the second cabinet to the outside and be fixedly connected to the first sealing plate (140).

10. The parallel connection structure according to claim 9, characterized in that: The connecting member (300) is a bolt, the first sealing plate (140) is embedded with a blind hole nut (142), and the bolt is threadedly connected to the blind hole nut (142).

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