A distribution network fault indicator

Abstract

The present invention discloses a distribution network fault indicator. The distribution network fault indicator includes an upper housing and a lower housing. Cable grooves are provided on opposite sides of the upper and lower housings. An upper pressing piece is arranged in the cable groove of the upper housing, and a lower pressing piece is arranged in the cable groove of the lower housing. A guide rail is arranged between the upper housing and the lower housing. A lead screw is arranged in the guide rail. The thread on the lead screw meshes with the thread in the upper pressing piece and drives the upper pressing piece to move in the extending direction of the lead screw by rotation. The lower pressing piece is fixedly connected to the lower housing through bolts, and a non-rigid connection is formed between the upper pressing piece and the upper housing.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent monitoring of distribution networks, and particularly to a fault indicator for a distribution network. Background Art

[0002] The distribution network is directly connected to users. Its reliable power supply capacity and power supply quality are not only a direct reflection of the economic benefits of power enterprises, but also have immeasurable social benefits. Automatic fault location of the distribution network, as an important part of distribution automation, has a great impact on improving power supply reliability and has received more and more attention.

[0003] In the prior art, a variety of fault indicators for distribution networks have been disclosed. For example, a fault indicator for a distribution network is disclosed in CN20740843U. The fault indicator for the distribution network includes a current transformer, an upper shell, and a lower shell. From the structure described in this device, it can be seen that the fault indicator for the distribution network relies on the upper shell and the lower shell to form a space for accommodating cables, and relies on a pressing spring to fix the fault indication and positioning device on the cable. This fixing method is not firm and there is a hidden danger of loosening.

[0004] A distribution network intelligent sensor is disclosed in CN207198282U. The intelligent sensor includes an upper shell and a lower shell. Between the upper shell and the lower shell, there are respectively provided a pressing and locking mechanism for fixing the distribution cable, a connecting mechanism for connecting the upper shell and the lower shell, and a connecting hole for the distribution cable to pass through. According to the above structural description, it can be seen that the distribution network intelligent sensor requires at least two locking mechanisms, one for locking the cable and one for closing the upper and lower shells. However, in order to ensure the firmness of the cable and the upper and lower shells, generally, when assembling, the pressing and locking mechanism and the connecting mechanism will be tightened, resulting in excessive stress on the upper and lower shells, which may cause deformation of the shells and thus pose a hidden danger of the device falling off the cable.

[0005] Therefore, there is a need in the art for a fault indicator for a distribution network that can be firmly and reliably fixed on a cable. Summary of the Invention

[0006] The technical objective to be achieved by the present invention is to enable the fault indicator of the distribution network to be stably fixed on the cable, eliminating the hidden danger of loosening of the fault indicator caused by cable shaking and equipment aging.

[0007] Based on the above technical objectives, the present invention provides a distribution network fault indicator, which includes an upper housing and a lower housing. Cable grooves are provided on the opposite sides of the upper and lower housings. An upper pressing piece is arranged in the cable groove of the upper housing, and a lower pressing piece is arranged in the cable groove of the lower housing. A guide rail is arranged between the upper housing and the lower housing, and a lead screw is arranged in the guide rail. The thread on the lead screw meshes with the thread in the upper pressing piece and drives the upper pressing piece to move in the extending direction of the lead screw by rotation. The lower pressing piece is fixedly connected to the lower housing through bolts, and a non-rigid connection is formed between the upper pressing piece and the upper housing.

[0008] In one embodiment, the non-rigid connection means that the upper pressing piece is connected to a limiting plate inside the upper housing through a connecting rod, and a spring is sleeved outside the connecting rod. One end of the spring is connected to the limiting plate, and the other end is connected to the inner wall of the upper housing.

[0009] In one embodiment, a guiding post is arranged on the upper part of the upper pressing piece, and the guiding post is inserted into a guiding through hole in the upper housing.

[0010] In one embodiment, one end of the lead screw located in the lower housing is connected to a torque limiter, and a rotating handle is connected through the torque limiter.

[0011] In one embodiment, a guiding piece is arranged on the side of the upper housing for installing cables, and the guiding piece is installed on the upper housing through a pivot shaft.

[0012] In one embodiment, bumps and buckles are arranged on the guiding piece. When the upper housing and the lower housing are continuously closed, the bumps are squeezed by the upper surface of the lower housing, thereby driving the guiding piece to continuously approach the sides of the upper housing and the lower housing. When the upper and lower housings are tightly attached, the guiding piece is tightly attached to the sides of the upper and lower housings, and at the same time, the buckle is snapped into a corresponding slot in the lower housing.

[0013] In one embodiment, a water guiding eaves is arranged at the end of the upper housing to prevent rainwater from flowing into the space between the upper and lower housings and forming a water film.

[0014] In one embodiment, an openable transparent end cover is arranged at the lower part of the lower housing, and a distribution network operation data processing unit is also arranged inside the lower housing.

[0015] In one embodiment, an AC power taking coil and a small current detection coil are arranged in the upper housing and the lower housing.

[0016] The advantages of the present invention are as follows:

[0017] 1. A non-rigid connection is used between the upper housing and the upper pressing piece of the present invention, which avoids excessive rigid extrusion between the upper housing and the upper pressing piece when the cable is tightened, thereby preventing the entire fault indicator from falling off due to the aging of the upper housing.

[0018] 2. A torque limiter is added between the lead screw and the rotating handle in the present invention, which prevents over-extrusion while meeting the requirement of pressing the cable tightly.

[0019] 3. A water guide eaves is provided on the vehicle repair of the upper shell in the present invention to prevent the formation of a water film between the upper and lower shells.

[0020] Other features and advantages of the present invention will be described in the following specification, and in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is a three-dimensional schematic diagram of a distribution network fault indicator according to the present invention;

[0023] Figure 2 is an internal sectional view of the distribution network fault indicator in the open state according to the present invention;

[0024] Figure 3 is an internal sectional view of the distribution network fault indicator in the closed state according to the present invention. Detailed Description of the Embodiment

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the following further elaborates on the present invention in conjunction with the attached Figures 1 - 3 for a more detailed description of the present invention.

[0026] The distribution network fault indicator in this embodiment includes an upper shell 1 and a lower shell 2. Cable grooves are provided on the opposite sides of the upper and lower shells, and the two opposite cable grooves form a cable through hole 110 when the upper and lower shells are closed.

[0027] Coils for AC power supply and current detection are provided in the upper shell 1 and the lower shell 2.

[0028] A upper pressing piece 3 is arranged in the cable slot of the upper shell 1, and a lower pressing piece 4 is arranged in the cable slot of the lower shell 2. When the upper shell 1 and the lower shell 2 are closed, the cable 100 is clamped between the upper pressing piece 3 and the lower pressing piece 4. A guide rail 5 is arranged between the upper and lower shells. A lead screw 6 is arranged in the guide rail 5. The thread on the lead screw 6 meshes with the thread in the upper pressing piece 3, and the upper pressing piece 3 is driven to move in the extending direction of the lead screw 6 by rotation. One end of the lead screw 6 located in the lower shell 2 is connected with a torque limiter 7, and a rotating handle 8 is connected through the torque limiter 7. When the user operates to rotate the rotating handle 8, the lead screw 6 is driven to rotate by the torque limiter 7. When the upper and lower pressing pieces are closed to the maximum torque position, continuing to rotate the rotating handle 8 can only make the torque limiter 7 idle, and the lead screw 6 stops rotating.

[0029] The lower pressing piece 4 is fixedly connected with the lower shell 2 by bolts. The upper pressing piece 3 is connected with a limiting plate 14 inside the upper shell 1 through a connecting rod 12. At the same time, a guiding column 13 is arranged on the upper part of the upper pressing piece 3, and the guiding column 13 is inserted into a guiding through hole 15 in the upper shell 1. A spring 11 is sleeved outside the connecting rod 12. One end of the spring 11 is connected with the limiting plate 14, and the other end is connected with the inner wall of the upper shell 1. Through the above structure, a non-rigid connection is formed between the upper pressing piece 3 and the upper shell 1, thus avoiding the rigid extrusion caused by the need to lock the cable between the upper pressing piece 3 and the upper shell 1, and further forming a potential risk of falling off.

[0030] A guiding piece 9 is arranged on the side of the upper shell 1 for installing the cable. The guiding piece 9 is installed on the upper shell 1 through a pivoting shaft 19. When the upper shell 1 and the lower shell 2 are in an open state, Figure 2 , the guiding piece 9 is in an open position. At this time, if the fault indicator needs to be installed on the cable, the guiding piece 9 can easily guide the cable into the interior of the fault indicator. A convex block 18 and a buckle 16 are arranged on the guiding piece 9. When the upper shell 1 and the lower shell 2 are continuously closed, the convex block 18 is squeezed by the upper surface of the lower shell 2, so as to drive the guiding piece 9 to continuously approach the sides of the upper shell 1 and the lower shell 2. When the upper and lower shells are tightly attached, the guiding piece 9 is tightly attached to the sides of the upper and lower shells, and at the same time, the buckle 16 is snapped into a slot 17 at the corresponding position of the lower shell 2.

[0031] A water guiding eaves 21 is arranged at the end of the upper shell 1, so as to prevent rainwater from flowing into the space between the upper and lower shells to form a water film and affect the operation of the fault indicator.

[0032] A transparent end cover 10 is provided at the lower part of the lower housing 2. The transparent end cover 10 is detachable. Through the transparent end cover 10, an alarm signal can be displayed. At the same time, after the transparent end cover 10 is opened, the SIM card inside the lower housing 2 can be replaced through the opening or the circuit inside the lower housing 2 can be debugged. At the same time, a power distribution network operation data processing unit is provided inside the lower housing 2. The data processing unit can implement at least one of the following functions: 1. Judgment of power distribution network fault location; 2. Recording of fault waveforms when power distribution network faults occur; 3. Aggregation of fault waveform data; 4. Collection of power distribution network operation loop information, such as temperature and humidity, wind speed, vibration, images, etc.

Claims

1. A distribution network fault indicator, characterized in that, The distribution network fault indicator includes an upper housing (1) and a lower housing (2). Cable grooves are provided on the opposite sides of the upper and lower housings. When the upper and lower housings are closed, two opposite cable grooves form a cable through-hole (110). An upper pressing piece (3) is arranged in the cable groove of the upper housing (1), and a lower pressing piece (4) is arranged in the cable groove of the lower housing (2). A guide rail (5) is arranged between the upper housing (1) and the lower housing (2), and a lead screw (6) is arranged in the guide rail (5). The thread on the lead screw (6) meshes with the thread in the upper pressing piece (3) and drives the upper pressing piece (3) to move in the extending direction of the lead screw (6) by rotation. The lower pressing piece (4) is fixedly connected to the lower housing (2) by bolts, and a non-rigid connection is formed between the upper pressing piece (3) and the upper housing (1). The non-rigid connection means that the upper pressing piece (3) is connected to a limit plate (14) inside the upper housing (1) through a connecting rod (12). A spring (11) is sleeved outside the connecting rod (12). One end of the spring (11) is connected to the limit plate (14), and the other end is connected to the inner wall of the upper housing (1). A guiding column (13) is arranged on the upper part of the upper pressing piece (3), and the guiding column (13) is inserted into a guiding through-hole (15) in the upper housing (1).

2. The fault indicator for a distribution network according to claim 1, characterized in that, One end of the lead screw (6) located in the lower housing (2) is connected to a torque limiter (7), and a rotating handle (8) is connected through the torque limiter (7).

3. The fault indicator for a distribution network according to claim 1, characterized in that, A guiding piece (9) is arranged on the upper housing (1) on the side for installing the cable. The guiding piece (9) is installed on the upper housing (1) through a pivot shaft (19).

4. The fault indicator for a distribution network according to claim 3, characterized in that, The guiding piece (9) is provided with a convex block (18) and a buckle (16). When the upper housing (1) and the lower housing (2) are continuously closed, the convex block (18) is squeezed by the upper surface of the lower housing (2), thereby driving the guiding piece (9) to continuously approach the side surfaces of the upper housing (1) and the lower housing (2). When the upper and lower housings are tightly attached, the guiding piece (9) is tightly attached to the side surfaces of the upper and lower housings, and at the same time, the buckle (16) is snapped into a clamping groove (17) at the corresponding position of the lower housing (2).

5. The fault indicator for a distribution network according to claim 1, wherein A water guiding eaves (21) is arranged at the end of the upper housing (1) to prevent rainwater from flowing into the space between the upper and lower housings and forming a water film.

6. The fault indicator for a distribution network according to claim 1, wherein, A transparent end cover (10) that can be opened is arranged at the lower part of the lower housing (2), and a distribution network operation data processing unit is also arranged inside the lower housing (2).

7. The fault indicator for a distribution network according to claim 1, characterized in that, An AC power taking coil and a current detection coil are arranged in the upper housing (1) and the lower housing (2).

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