Pouring bus expansion joint

Abstract

The utility model relates to a pouring bus expansion joint, comprising two pouring box bodies which are oppositely arranged at an interval and are internally provided with box body cavities; the two ends of the flexible connection penetrate through the opposite end faces of the two pouring box bodies correspondingly, and the flexible connection is arranged in the box body cavity; the flexible connection is a cable; the bus connecting end is arranged in the cavity of the box body and comprises a copper bar and a cable head, one end of the copper bar penetrates through the cavity of the box body, and the other end of the copper bar is connected with the cable through the cable head; and a pouring insulator is arranged in the cavity of the box body. According to the utility model, the pouring box body is arranged, so that the construction of pouring the bus expansion joint is convenient; cables are adopted for flexible connection between the pouring box bodies, and good insulation and sealing effects are achieved; the telescopic device has the advantages of simple structure, convenience in use, low cost and large telescopic range.

Description

TECHNICAL FIELD

[0001] The utility model relates to busbar connecting piece technical field especially relates to a pouring busbar expansion joint. BACKGROUND

[0002] With more and more large power load, the use of 10kV pouring busbar is more and more common, and the use amount also increases year by year. Pouring busbar has unique advantages in electric energy transmission. With the increase of length, pouring busbar deforms in transverse and longitudinal directions under the change of temperature or other natural conditions such as thermal expansion and cold contraction. Therefore, it is necessary to configure a suitable busbar expansion joint.

[0003] In the traditional busbar expansion joint, the pouring body is integrally arranged, and the soft connection usually adopts an umbrella skirt or the like. The conductive part of the umbrella skirt or the like is directly exposed and arranged, which is easy to cause short circuit failure and dangerous situation. Therefore, an overall housing is usually arranged on the busbar expansion joint to play a protection role.

[0004] However, this way results in a large volume and high manufacturing cost of the busbar expansion joint. In addition, due to the design of the busbar expansion joint housing, it is inconvenient to pour the insulating body of the busbar expansion joint, which affects the protection of the busbar expansion joint. Even if there is a housing, it only has a preliminary protection function and cannot play a sealing effect.

[0005] The resin pouring busbar expansion joint provided in Chinese invention patent CN110676783A fills an insulating elastic colloid in the cavity between the insulating pouring body and the multiphase conductor arranged in parallel between the two pouring bodies. This not only has high cost and complicated production steps, but also has the problem that the expansion range of the soft connection is affected by the deformation range of the insulating elastic colloid, which affects the use effect of the expansion joint. CONTENT OF THE UTILITY MODEL

[0006] To solve the above technical problems in the prior art, the purpose of the utility model is to provide a pouring busbar expansion joint which has the advantages of convenient use, low cost and large expansion range.

[0007] To achieve the above purpose of the utility model, the utility model provides a pouring busbar expansion joint, which comprises:

[0008] two pouring box bodies arranged oppositely and at intervals, and a box cavity is arranged in the two pouring box bodies;

[0009] a soft connection, the two ends of the soft connection penetrate the opposite end faces of the two pouring box bodies respectively, and the soft connection is arranged in the box cavity; the soft connection is a cable;

[0010] a busbar connecting end, which is arranged in the box cavity and comprises a copper bar and a cable head, one end of the copper bar penetrates the box cavity, and the other end of the copper bar is connected with the cable through the cable head.

[0011] The box cavity is provided with a pouring insulation body.

[0012] According to one of the technical schemes of the utility model, the pouring box body comprises:

[0013] The first sealing plate is provided with terminal mounting holes in the side surface; the end part of the copper bar is embedded on the terminal mounting plate, and the terminal mounting plate is embedded in the terminal mounting hole;

[0014] The second sealing plate is provided with a plurality of cable passing holes in the side surface; the cable passes through the second sealing plate through the cable passing hole;

[0015] The first side plate is arranged between the first sealing plate and the second sealing plate;

[0016] The first bottom plate is arranged on the bottom surface of the first sealing plate, the second sealing plate and the first side plate, and forms a box body with an open top surface.

[0017] According to one of the technical schemes of the utility model, the second sealing plate is a nylon plate.

[0018] According to one of the technical schemes of the utility model, the top surface of the box body is provided with a first top plate.

[0019] According to one of the technical schemes of the utility model, the pouring box body further comprises:

[0020] The second side plate and the second bottom plate are arranged on the side surface of the first sealing plate and form a wiring support part, and the end of the copper bar away from the cable head penetrates through the first sealing plate and is arranged on the wiring support part.

[0021] According to one of the technical schemes of the utility model, the second bottom plate is provided with a wiring avoiding groove.

[0022] According to one of the technical schemes of the utility model, the top surface of the wiring support part is provided with a second top plate.

[0023] According to one of the technical schemes of the utility model, the length of the bus bar is twice the length of the pouring bus bar expansion joint.

[0024] According to one of the technical schemes of the utility model, one end of the copper bar is used for connecting with the bus bar, and the other end is used for connecting with the cable head; the cable head connecting end of the copper bar is provided with a first power connection hole; the end of the copper bar used for connecting with the bus bar is provided with a U-shaped groove.

[0025] One end of the cable head is connected with the cable, and the other end is provided with a power connection terminal; the power connection terminal is plate-shaped, and the power connection terminal is provided with a second power connection hole.

[0026] The copper bar and the power connection terminal are fixedly connected through the connecting piece penetrating the first power connection hole and the second power connection hole.

[0027] According to one of the technical schemes of the utility model, the outer circumferential surface of the cable head is provided with a convex ring.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] The utility model discloses a pouring busbar expansion joint which adopts a cable as a flexible connection between pouring bodies, guarantees the insulation of the pouring busbar expansion joint, ensures that the expansion joint has good expansion performance, and thus meets the expansion requirement of the pouring busbar expansion joint, and has the advantages of simple structure and low cost.

[0030] In the utility model, the pouring box body is simple in structure and convenient to install, and pouring of the insulation pouring body is facilitated. The pouring box body is provided with a second sealing plate and a second cover plate to form a cable supporting device, so that the force on the busbar cable and the expansion joint connection is avoided, and the service life of the expansion joint is affected DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0032] Figure 1 The structure schematic diagram of the pouring busbar expansion joint provided in one embodiment of the utility model is schematically shown.

[0033] Figure 2 The cross-sectional structure schematic diagram of the pouring busbar expansion joint provided in one embodiment of the utility model is schematically shown.

[0034] Figure 3 The position relation schematic diagram of the first bottom plate, the second bottom plate and the first sealing plate in one embodiment of the utility model is schematically shown.

[0035] Figure 4 The structure schematic diagram of the copper bar in one embodiment of the utility model is schematically shown.

[0036] The corresponding relation between the component names and the figure marks is as follows:

[0037] 1, pouring box body, 2, flexible connection, 3, busbar connection end,

[0038] 11, first bottom plate; 12, first sealing plate; 13, second sealing plate; 14, first side plate; 15, second side plate; 16, second bottom plate; 17, first top plate; 18, second top plate;

[0039] 121, terminal mounting hole;

[0040] 161, wiring avoiding slot;

[0041] 31, copper bar; 32, cable head;

[0042] 311, first power connection hole; 312, U-shaped slot;

[0043] 321, power connection terminal; 322, second power connection hole. DETAILED DESCRIPTION

[0044] The description of the embodiments of the present application should be combined with the corresponding drawings, which should be considered as a part of the complete description. In the drawings, the shape or thickness of the embodiments can be exaggerated and simplified or convenient for illustration. Furthermore, parts of the structures in the drawings will be described separately, and it should be noted that the elements not shown or not described by words in the drawings are in the form known by those skilled in the art.

[0045] The description of the embodiments herein, any reference to direction and position, is only for the convenience of description, and cannot be understood as any limitation on the protection scope of the present application. The following description of the preferred embodiments will involve the combination of features, which can exist independently or in combination, and the present application is not particularly limited to the preferred embodiments. The scope of the present application is defined by the claims.

[0046] As shown in Figures 1 to 4 The pouring busbar expansion joint of the present application comprises two pouring box bodies 1, a flexible connection 2 and a busbar connection end 3.

[0047] The two pouring box bodies 1 are arranged opposite and spaced apart, and the inside of the pouring box body 1 is provided with a box cavity. The two ends of the flexible connection 2 respectively penetrate the opposite end faces of the two pouring box bodies 1 and are arranged in the box cavity, and the flexible connection 2 is a cable. The busbar connection end 3 is arranged in the box cavity and comprises a copper bar 31 and a cable head 32. One end of the copper bar 31 penetrates the box cavity, and the other end of the copper bar 31 is connected with the cable through the cable head 32; and the box cavity is provided with a pouring insulator.

[0048] The pouring busbar can be connected with the copper bar 31 arranged at the two ends of the pouring busbar expansion joint. When the pouring busbar produces axial, transverse and angular expansion and contraction deformation due to temperature change (thermal expansion and contraction), the pouring busbar expansion joint can balance a certain deformation displacement amount in the transverse and longitudinal directions, so as to protect the pouring busbar from being damaged.

[0049] As Figure 1 And Figure 2 The pouring box 1 includes a first sealing plate 12, a second sealing plate 13, a first side plate 14 and a first bottom plate 11.

[0050] The side of the first sealing plate 12 is provided with a terminal mounting hole 121; the end of the copper bar 31 is embedded in the terminal mounting plate which is embedded in the terminal mounting hole 121.

[0051] The side of the second sealing plate 13 is provided with a plurality of cable passing holes; the cable is arranged through the second sealing plate 13 through the cable passing holes. The second sealing plate 13 can be a nylon plate to further improve the insulation properties of the flexible connection, thereby improving the service life and stability of the expansion joint.

[0052] The first side plate 14 is arranged between the first sealing plate 12 and the second sealing plate 13; the first bottom plate 11 is arranged on the bottom surface of the first sealing plate 12, the second sealing plate 13 and the first side plate 14, and forms a top open box with them, thereby facilitating the pouring of the insulator.

[0053] The pouring box 1 further includes a second side plate 15 and a second bottom plate 16 arranged on the side of the first sealing plate 12 to form a wiring support part, and the end of the copper bar 31 away from the cable head 32 is arranged on the wiring support part through the first sealing plate 12. The wiring support part supports the copper bar 31 and protects the connection between the busbar and the copper bar 31, thereby further prolonging the service life of the poured busbar expansion joint.

[0054] In some embodiments of the utility model, the second bottom plate 16 is provided with a wiring avoiding groove 161 to provide an operation space for the connection between the busbar and the copper bar 31, thereby improving the efficiency of the busbar and copper bar wiring operation.

[0055] In some embodiments of the utility model, the top surface of the box and the wiring support part is respectively provided with a first top plate 17 and a second top plate 18 to isolate and protect the conductors on the box and the wiring support part.

[0056] The poured busbar expansion joint can be set according to actual use needs, and generally, the length of the busbar is set to be twice the expansion length of the poured busbar expansion joint.

[0057] In some embodiments of this utility model, one end of the copper busbar 31 is used to connect to the busbar, and the other end is used to connect to the cable head 32. The cable head connection end of the copper busbar 31 is provided with a first power connection hole 311. The end of the copper busbar 31 used to connect to the busbar is provided with a U-shaped groove 312. When the copper busbar 31 is connected to the busbar, it is fixedly connected by bolts and nuts. The design of the U-shaped groove 312 facilitates the fine adjustment of the position of the busbar on the copper busbar 31, thereby avoiding the problem of misalignment of holes and bolts not being able to pass through during the connection process between the copper busbar 31 and the busbar, effectively improving the installation efficiency of the busbar and the copper busbar 31. One end of the cable head 32 is connected to the cable, and the other end is provided with a power connection terminal 321. The power connection terminal 321 is plate-shaped and is provided with a second power connection hole 322. The copper busbar 31 and the power connection terminal 321 are fixedly connected by a connector passing through the first power connection hole 311 and the second power connection hole 322. The connector can be a combination of bolts and nuts. The copper busbar 31 and the cable head 32 are connected by using a copper busbar and a plate-shaped electrical terminal, which has the advantages of simple and convenient connection operation and high connection stability.

[0058] In some embodiments of this utility model, a convex ring is provided on the outer circumferential surface of the cable head 32 to improve the stability of the cable head 32 inside the casting box 1.

[0059] It should be noted that the above description represents a preferred embodiment of this utility model. While preferred embodiments have been described, those skilled in the art, upon understanding the basic inventive concept of this utility model, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of this utility model. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of this utility model.

Claims

1. A cast-in-place busbar expansion joint, characterized in that, include: Two opposing and spaced-apart casting boxes (1) are provided with a cavity inside. A flexible connector (2) has its two ends passing through the opposite end faces of the two casting boxes (1) and is disposed in the cavity of the box; the flexible connector (2) is a cable; The busbar connection terminal (3) is located inside the enclosure cavity and includes a copper busbar (31) and a cable head (32). One end of the copper busbar (31) passes through the enclosure cavity, and the other end of the copper busbar (31) is connected to the cable through the cable head (32). The cavity of the box is equipped with a cast insulator.

2. The cast-in-place busbar expansion joint according to claim 1, characterized in that, Each of the casting boxes (1) includes: The first sealing plate (12) has a terminal mounting hole (121) on its side; the end of the copper busbar (31) is embedded in the terminal mounting plate, and the terminal mounting plate is embedded in the terminal mounting hole (121); The second sealing plate (13) has several cable exit holes on its side; the cable passes through the cable exit holes and is installed through the second sealing plate (13); The first side plate (14) is disposed between the first sealing plate (12) and the second sealing plate (13); The first base plate (11) is set on the bottom surface of the first sealing plate (12), the second sealing plate (13) and the first side plate (14), forming a box with an open top surface.

3. The cast busbar expansion joint according to claim 2, characterized in that, The second sealing plate (13) is a nylon plate.

4. The cast busbar expansion joint according to claim 2, characterized in that, The top surface of the box is provided with a first top plate (17).

5. The cast busbar expansion joint according to claim 2, characterized in that, The casting box (1) also includes: The second side plate (15) and the second bottom plate (16) are disposed on the side of the first sealing plate (12) to form a wiring support part. The end of the copper busbar (31) away from the cable head (32) passes through the first sealing plate (12) and is disposed on the wiring support part.

6. The cast-in-place busbar expansion joint according to claim 5, characterized in that, The second base plate (16) is provided with a wiring clearance groove (161).

7. The cast busbar expansion joint according to claim 5, characterized in that, A second top plate (18) is provided on the top surface of the wiring support.

8. The cast busbar expansion joint according to claim 1, characterized in that, The busbar length is twice the expansion length of the cast busbar expansion joint.

9. The cast busbar expansion joint according to claim 1, characterized in that, One end of the copper busbar (31) is used to connect to the busbar, and the other end is used to connect to the cable head (32). The cable head connection end of the copper busbar (31) is provided with a first power connection hole (311); the end of the copper busbar (31) used to connect to the busbar is provided with a U-shaped groove (312). One end of the cable head (32) is connected to the cable, and the other end is provided with a power terminal (321). The power terminal (321) is plate-shaped and has a second power hole (322). The copper busbar (31) and the power terminal (321) are fixedly connected by a connector passing through the first power connection hole (311) and the second power connection hole (322).

10. The cast-in-place busbar expansion joint according to claim 1, characterized in that, The cable head (32) has a raised ring on its outer circumference.

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