CN220399528U - Intelligent waterproof type tunnel cable grounding circular flow detection device - Google Patents

Abstract

The utility model discloses an intelligent waterproof type tunnel cable grounding annular flow detection device which comprises a control box, a current transformer and a lifting mechanism, wherein a power module, a control module and a communication module are arranged in the control box, and the power module and the communication module are respectively and electrically connected with the control module; the three current transformers are respectively arranged on the ground wire of the middle joint of the three-phase cable and are electrically connected with the control module; the elevating system is fixed on the top of tunnel, and the control box is connected with elevating system, and elevating system is provided with the breakwater with the tunnel junction all around. The control box is arranged on the lifting mechanism, so that the control box automatically rises into the water baffle at the top of the tunnel when the tunnel is immersed, water inlet of the control box is avoided, and the safety of equipment is ensured; through installing tilting mechanism on the breakwater, make the control box upset after rising, avoid the chamber door or the junction department of control box to soak, further improve the security of control box.

Description

Intelligent waterproof type tunnel cable grounding circular flow detection device

Technical Field

The utility model relates to the technical field of cable grounding circular flow detection devices, in particular to an intelligent waterproof tunnel cable grounding circular flow detection device.

Background

With the continuous development of urban construction, the requirements of people living and industrial production on electric power are higher and higher, the high-voltage overhead line cannot adapt to the requirements of the current city, and the number and the length of various cable tunnels are increased year by year. The cable tunnel not only can reduce overhead line's occupation of land, practices thrift urban space, can also reduce external damage and the mechanical damage to the cable, makes things convenient for the staff to overhaul or change the cable. In order to ensure the normal and efficient operation of the power cable tunnel, the operation condition of the cable in the cable tunnel needs to be monitored, and the potential safety hazard existing in the cable tunnel is timely and accurately discovered,

because of the existence of induced potential and the grounding of the cable sheath forms a current loop, the cable sheath has a certain magnitude of induced current, namely cable grounding circulation. If the cable sheath causes multipoint contact faults, ground wire theft, ground protector faults and the like due to rat damage, aging and the like, the cable grounding flow is increased, cable loss and heat are caused, insulation aging is accelerated, and the temperature of a lead wire contact or a welding point is locally increased due to possible poor connection, so that the safe operation of a cable line is endangered. Therefore, the operation condition of the power cable can be known by detecting the cable grounding loop, and the fault of the power cable can be known in time, so that the safe operation of the power system is ensured.

However, because the cable tunnel is deep underground, there is a risk of water inflow in areas with high water level or in rainy season, and the use safety of the cable grounding circular flow detection device is seriously threatened, so that an intelligent waterproof type tunnel cable grounding circular flow detection device is needed.

Disclosure of Invention

The utility model aims to provide an intelligent waterproof type tunnel cable grounding annular flow detection device, which solves the technical problems in the background art, and is realized by the following technical scheme:

the intelligent waterproof type tunnel cable grounding circular flow detection device comprises a control box, a current transformer and a lifting mechanism, wherein a power module, a control module and a communication module are arranged in the control box, and the power module and the communication module are respectively and electrically connected with the control module; the three current transformers are respectively arranged on the grounding wire of the middle joint of the three-phase cable and are electrically connected with the control module; the lifting mechanism is fixed at the top end of the tunnel, the control box is connected with the lifting mechanism, and water baffles are arranged around the connection part of the lifting mechanism and the tunnel.

Further, elevating system includes guide arm and flotation pontoon, and the top of guide arm is fixed in the top of tunnel, and the bottom of guide arm is fixed with the anticreep piece, the control box passes through linear bearing sliding arrangement on the guide arm, the flotation pontoon is fixed in the control box bottom.

Further, elevating system includes scissor lift and water logging sensor, and scissor lift fixes the top in the tunnel, and the control box is fixed in the lower extreme of scissor lift, water logging sensor fixes the lower extreme at the control box, scissor lift, water logging sensor all with control module electric connection.

Further, be provided with the upset support between scissor lift and the control box, the upset support includes the connecting seat and fixes the inverted U type connecting rod in the connecting seat downside, and the lower extreme at the scissor lift is fixed to the connecting seat, the middle part of control box both sides wall rotates with the both ends portion of connecting rod respectively and is connected.

Further, be provided with tilting mechanism on the breakwater, tilting mechanism includes fixing base, depression bar, compression roller and kicking block, and the fixing base is fixed on the breakwater, the upper end of depression bar is articulated with the fixing base, the lower extreme at the depression bar is installed in the rotation of compression roller, the kicking block is fixed in the downside of fixing base, and depression bar and kicking block butt make compression roller, control box at least partially coincide in the projection of horizontal plane.

Further, an extension spring is arranged between the compression bar and the top block.

The technical scheme provided by the embodiment of the application has at least the following technical effects or advantages:

1. according to the device, the control box is arranged on the lifting mechanism, so that the control box automatically rises into the water baffle at the top of the tunnel when the tunnel is immersed, water inlet of the control box is avoided, and the safety of equipment is ensured;

2. the device enables the ascending control box to turn over by installing the turning mechanism on the water baffle, avoids the water immersion at the box door or the wiring port of the control box, and further improves the safety of the control box.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of a control box according to embodiment 1 or 2 of the present application;

FIG. 2 is a schematic structural diagram of embodiment 1 of the present application;

fig. 3 is a schematic structural diagram of a lifting mechanism according to embodiment 1 of the present application;

FIG. 4 is a schematic structural diagram of embodiment 2 of the present application;

fig. 5 is a schematic diagram of a turnover bracket structure according to embodiment 2 of the present application;

fig. 6 is a schematic structural diagram of a turnover mechanism according to embodiment 2 of the present application;

fig. 7 is a schematic diagram of embodiment 2 of the present application.

The symbols in the drawings are: 1. a control box; 11. a case; 12. a door; 13. a waterproof joint; 2. a guide rod; 21. a connecting plate; 22. an anti-falling block; 23. a linear bearing; 3. a water baffle; 4. a pontoon; 5. A turnover mechanism; 51. a connecting seat; 52. a connecting rod; 53. a rotating shaft; 6. a scissor lift; 7. A turnover mechanism; 71. a fixing seat; 72. a compression bar; 73. a press roller; 74. a top block; 75. and (5) stretching the spring.

Detailed Description

In order that the manner in which the above recited features of the present utility model can be better understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-3, an intelligent waterproof type tunnel cable grounding circular flow detection device comprises a control box 1, a current transformer (not shown), a guide rod 2, a water baffle 3 and a pontoon 4. The control box 1 comprises a box body 11 and a box door 12, four wire inlet holes are formed in the box body 11, the wire inlet holes are all located on the upper side of the box door 12, and waterproof connectors 13 are respectively arranged at the wire inlet holes. The box 11 and the box door 12 are formed by welding stainless steel plates, the box door 12 is fixed on the box 11 through bolts, and sealing strips are arranged at the joint of the box door 12 and the box 11, so that the tightness of the control box 1 is improved.

The control box 1 is internally provided with a power module, a control module and a communication module, and three current transformers are respectively installed on a three-phase cable intermediate head grounding wire and are electrically connected with the control module through three signal wires. The control module is used for receiving the current signal acquired from the current transformer and analyzing the data of the electric signal to obtain cable grounding loop state data; the power module is electrically connected with the control module and is used for supplying power to the control module, and preferably, the power module is a UPS power module so as to avoid abnormal operation of the detection device caused by power failure, and the UPS module is used for supplying power through a power line; the communication module is electrically connected with the control module, and an antenna of the communication module extends out of the box body of the control box 1 and is used for sending grounding loop state data to the background server, so that real-time monitoring of cable grounding loop current is realized. The signal wire of the current transformer and the power wire of the UPS power supply extend into the control box 1 through the waterproof joint 13, and the joint of the communication module antenna and the control box 1 is sealed through epoxy resin, so that the tightness of the control box 1 is ensured. The power module, the control module and the communication module are of the prior art, and a user can configure and purchase according to the requirement.

As shown in fig. 2 and 3, a rectangular connecting plate 21 is welded and fixed at the top end of the guide rod 2, four through holes are formed in the connecting plate 21, the guide rod 2 is fixed at the top end of the tunnel through expansion bolts, four water baffles 3 are respectively fixed on the periphery of the guide rod 2, and the water baffles 3 and the top wall of the tunnel enclose a water-proof space with an opening at the lower part. The bottom of the guide rod 2 is fixed with an anti-drop block 22, the guide rod 2 is slidably provided with a linear bearing 23, and the control box 1 is fixedly connected with the linear bearing 23, so that the guide rod 2 can move up and down. The pontoon 4 is a hollow plastic barrel, and the pontoon 4 is glued at the bottom of the control box 1.

The working principle of the embodiment is as follows:

in a normal state, under the action of gravity, the control box is lapped on the anti-drop block 22 through the linear bearing, so that an operator can conveniently operate the control box;

in the water inlet state, the pontoon at the bottom of the control box drives the control box to float upwards, so that the control box is far away from the water surface, and even if the water in the tunnel is immersed to the top, the control box can be prevented from being soaked in the closed space surrounded by the water baffle, thereby ensuring the safety of elements in the control box.

Preferably, the guide rods 2 are arranged in two groups, and the two groups of guide rods are arranged in parallel, so that the control box is prevented from rotating.

Example two

As shown in fig. 1, 4 and 5, an intelligent waterproof type tunnel cable grounding circular flow detection device comprises a control box 1, a current transformer (not shown), a water baffle 3, a turnover support 5, a scissor type lifter 6, a water immersion sensor (not shown) and a turnover mechanism 7. The control box 1 comprises a box body 11 and a box door 12, four wire inlet holes are formed in the box body 11, the wire inlet holes are all located on the upper side of the box door 12, and waterproof connectors 13 are respectively arranged at the wire inlet holes. The box 11 and the box door 12 are formed by welding stainless steel plates, the box door 12 is fixed on the box 11 through bolts, and sealing strips are arranged at the joint of the box door 12 and the box 11, so that the tightness of the control box 1 is improved.

The control box 1 is internally provided with a power module, a control module and a communication module, and three current transformers are respectively installed on a three-phase cable intermediate head grounding wire and are electrically connected with the control module through three signal wires. The control module is used for receiving the current signal acquired from the current transformer and analyzing the data of the electric signal to obtain cable grounding loop state data; the power module is electrically connected with the control module and is used for supplying power to the control module, and preferably, the power module is a UPS power module so as to avoid abnormal operation of the detection device caused by power failure, and the UPS module is used for supplying power through a power line; the communication module is electrically connected with the control module, and an antenna of the communication module extends out of the box body of the control box 1 and is used for sending grounding loop state data to the background server so as to realize real-time monitoring of the cable grounding loop; the water logging sensor is fixed in the bottom of control box 1, and water logging sensor and control module electric connection. The signal wire of the current transformer and the power wire of the UPS power supply extend into the control box 1 through the waterproof joint 13, and the connection parts of the communication module antenna, the water immersion sensor and the control box 1 are sealed through epoxy resin, so that the tightness of the control box 1 is ensured.

The scissor lift 6 is fixed at the top end of the tunnel through expansion bolts, and four water baffles 3 are enclosed around the scissor lift 6 and form a water-proof space with an opening at the lower part with the top wall of the tunnel. The control box 1 is fixed at the lower end of the scissor type lifter 6 through the turnover mechanism 5, a driving motor of the scissor type lifter 6 is electrically connected with the control module, and when the water immersion sensor detects water immersion, the control module drives the driving motor of the scissor type lifter 6 to act, so that the contraction of the scissor type lifter 6 is realized, and the control box 1 is lifted into a water-proof space surrounded by the four water baffles 3.

As shown in fig. 5, the overturning bracket 5 comprises a connecting seat 51 and an inverted U-shaped connecting rod 52 welded and fixed on the lower side of the connecting seat 51, the connecting seat 51 is fixed on the lower end of the scissor lift 6 through bolts, rotating shafts 53 are welded and fixed on the inner sides of the lower ends of the connecting rods 52 respectively, and the middle parts of two sides of the control box 1 are connected with the rotating shafts 53 through bearings, so that the control box 1 can overturn along the rotating shafts 53.

As shown in fig. 1, 4 and 6, a turnover mechanism 7 is fixed on a water baffle 3 opposite to a box door 12, the turnover mechanism 7 comprises a fixed seat 71, a pressing rod 72, a pressing roller 73, a top block 74 and a tension spring 75, the fixed seat 71 is fixed on the water baffle 3, the upper end of the pressing rod 72 is hinged with the fixed seat 71, the pressing roller 73 is rotatably arranged at the lower end of the pressing rod 72, the top block 74 is fixed at the lower side of the fixed seat 71, and under the action of gravity, the pressing rod 72 naturally sags and is lapped on the top block 74, so that the projection of the pressing roller 73 in the vertical direction partially coincides with the control box 1, and the projection overlapping part of the pressing roller 73 and the control box is smaller than one quarter of the diameter of the pressing roller. A tension spring 75 is connected between the upper half of the plunger 72 and the top block 74 to exert a downward tension on the plunger 72. Preferably, the outer portion of the pressing roller 72 is coated with a rubber layer to avoid the crush injury and scratch of the control box 1.

The working principle of the embodiment of the application is as follows:

when the water sensor detects water inflow, the control module drives the scissor type lifter to shrink so as to enable the control box to ascend;

as shown in fig. 7 (a) - (c), when the control box rises and contacts with the press roller of the turnover mechanism, the press roller applies a leftward thrust to the upper part of the control box, so that the control box is inclined to the left side, and gradually turns the control box into a horizontal state along with the rising of the control box, so that the door and the wiring port of the control box are turned to the upper part, the situation that water is fed into the control box due to poor sealing is avoided, and the use safety of the device is ensured.

According to the intelligent waterproof type tunnel cable grounding circular flow detection device, the control box is arranged on the lifting mechanism, and when the tunnel is immersed, the control box automatically ascends into the water baffle at the top of the tunnel, so that water inflow of the control box is avoided, and the safety of equipment is ensured; meanwhile, the lifting mechanism is fixed at the top of the tunnel, so that corrosion of the lifting mechanism caused by water inflow can be avoided, and the service life of the control box is prolonged;

the device enables the ascending control box to turn over by installing the turning mechanism on the water baffle, avoids the water immersion at the box door or the wiring port of the control box, and further improves the safety of the control box.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. The intelligent waterproof type tunnel cable grounding circular flow detection device is characterized by comprising a control box, a current transformer and a lifting mechanism, wherein a power module, a control module and a communication module are arranged in the control box, and the power module and the communication module are respectively and electrically connected with the control module; the three current transformers are respectively arranged on the grounding wire of the middle joint of the three-phase cable and are electrically connected with the control module; the lifting mechanism is fixed at the top end of the tunnel, the control box is connected with the lifting mechanism, and water baffles are arranged around the connection part of the lifting mechanism and the tunnel.

2. The intelligent waterproof type tunnel cable grounding circular flow detection device according to claim 1, wherein the lifting mechanism comprises a guide rod and a pontoon, the top of the guide rod is fixed at the top end of the tunnel, the bottom of the guide rod is fixed with an anti-falling block, the control box is slidably arranged on the guide rod through a linear bearing, and the pontoon is fixed at the bottom of the control box.

3. The intelligent waterproof type tunnel cable grounding circular flow detection device according to claim 1, wherein the lifting mechanism comprises a scissor type lifter and a water sensor, the scissor type lifter is fixed at the top end of a tunnel, the control box is fixed at the lower end of the scissor type lifter, the water sensor is fixed at the lower end of the control box, and the scissor type lifter and the water sensor are electrically connected with the control module.

4. The intelligent waterproof type tunnel cable grounding circular flow detection device according to claim 3, wherein a turnover support is arranged between the scissor type lifter and the control box, the turnover support comprises a connecting seat and an inverted U-shaped connecting rod fixed on the lower side of the connecting seat, the connecting seat is fixed at the lower end of the scissor type lifter, and the middle parts of two side walls of the control box are respectively connected with two end parts of the connecting rod in a rotating mode.

5. The intelligent waterproof type tunnel cable grounding circular flow detection device according to claim 4, wherein the water baffle is provided with a turnover mechanism, the turnover mechanism comprises a fixed seat, a pressing rod, a pressing roller and a top block, the fixed seat is fixed on the water baffle, the upper end of the pressing rod is hinged with the fixed seat, the pressing roller is rotatably installed at the lower end of the pressing rod, the top block is fixed at the lower side of the fixed seat, and the pressing rod is abutted with the top block, so that projections of the pressing roller and the control box on a horizontal plane are at least partially overlapped.

6. The intelligent waterproof type tunnel cable grounding circulation detection device according to claim 5, wherein an extension spring is arranged between the compression bar and the top block.