Overcurrent detection device for subway power supply equipment

Abstract

The utility model discloses an over-current detection device for subway power supply equipment, which comprises a shell, a control unit is arranged on the front surface of a back plate, an auxiliary mechanism is arranged in the shell and comprises a cover plate, a square shell, a net plate and a moisture absorption agent bag, the outer side of the cover plate is movably connected with a groove in the upper part of the inner side of the shell, and the square shell is fixedly connected with the net plate. A square shell is installed at the bottom of the cover plate, a net plate is installed in a through hole in the bottom of the square shell, and a moisture absorption agent bag is arranged in the square shell. The utility model relates to the technical field of metro power supply detection, through cooperation among the square shell, the first spring and the rotating plate, the housing is used for protecting and sealing electronic equipment, water vapor in the housing is absorbed, normal work of internal electronic components is prevented from being affected by too high concentration of the internal water vapor, and the service life of the electronic components is prolonged. The problems that the protection effect of an existing device on overcurrent detection equipment is poor, and normal work of the detection equipment is affected if the water vapor concentration is too high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of subway power supply detection, in particular to an overcurrent detection device for subway power supply equipment. Background Art

[0002] Subway is a type of urban rail transit line system, which refers to a fast, large-capacity, electric-powered rail transit built in the city. The train runs on a fully enclosed line, and the line in the central city is basically set in an underground tunnel. In order to avoid overcurrent of the internal power supply equipment, an overcurrent detection device for subway power supply equipment is provided.

[0003] Overcurrent refers to the phenomenon that the current in a circuit exceeds the rated value during normal operation. Overcurrent may be caused by electrical failure, short circuit or other abnormal conditions. It may cause damage to the appliance or even a fire. Overcurrent is usually caused by the appliance being connected to a power source higher than its capacity, while overcurrent is an abnormal current in the circuit.

[0004] However, the existing device has a poor protection effect on the overcurrent detection equipment. If the water vapor concentration is too high, it will affect the normal operation of the detection equipment. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an overcurrent detection device for subway power supply equipment, which solves the problem that the existing device has a poor protection effect on the overcurrent detection equipment and that if the water vapor concentration is too high, it will affect the normal operation of the detection equipment.

[0006] To achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: an overcurrent detection device for subway power supply equipment, comprising a shell, the inner side of the shell is movably connected to a back plate, the front side of the back plate is equipped with a monitor, a current transformer and an air switch, wires pass through both sides of the shell, the outer side of the wires is electrically connected to a monitor and an air switch, the outer side of the wires passes through the inner side of the current transformer, a control unit is installed on the front side of the back plate, an auxiliary mechanism is arranged inside the shell, the auxiliary mechanism comprises a cover plate, a square shell, a mesh plate and a desiccant bag, the outer side of the cover plate is movably connected to the inner upper groove of the shell, the bottom of the cover plate is equipped with a square shell, the bottom through hole of the square shell is equipped with a mesh plate, and the inside of the square shell is equipped with a desiccant bag.

[0007] Preferably, a rotating plate is fitted between the bottom of the cover plate and the upper inner side of the shell, one side of the rotating plate is rotatably connected to a straight rod via a bearing, the top of the straight rod is fixedly connected to the upper inner side of the shell, the outer side of the straight rod is movably connected to a first spring, and both ends of the first spring are respectively fixedly connected to the bottom of the rotating plate and the bottom of the straight rod.

[0008] Preferably, two limit plates fixedly connected to two sides of the inner wall of the shell are attached to the upper and lower sides of the back plate.

[0009] Preferably, the front side of the limit plate is fitted with a limit block, the outer side of the limit block is movably connected to a vertical tube, the outer side of the vertical tube is fixedly connected to the inner side of the limit plate, and the top of the limit block is fixedly connected to the inner upper side of the vertical tube through a second spring.

[0010] Preferably, a door body is fixed to the front of the shell by bolts, and the front of the door body is made of high-strength glass.

[0011] Beneficial Effects

[0012] The utility model provides an overcurrent detection device for subway power supply equipment. It has the following beneficial effects: the overcurrent detection device for subway power supply equipment uses a shell to protect and seal the electronic equipment through the cooperation between the square shell, the first spring and the rotating plate, and realizes the absorption of water vapor inside the shell, so as to avoid the excessive concentration of internal water vapor affecting the normal operation of the internal electronic components, and solves the problem that the existing device has a poor protection effect on the overcurrent detection equipment, and if the water vapor concentration is too high, it will affect the normal operation of the detection equipment.

[0013] Through the cooperation between the back plate, the limit block and the second spring, the device can be quickly installed, which saves the assembly time of the user and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the appearance of the utility model;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the middle back plate, the limit block and the second spring;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the middle shell, the first spring and the rotating plate.

[0018] In the figure: 1, outer shell, 2, limit plate, 3, back plate, 4, cover plate, 5, square shell, 6, moisture absorbent bag, 7, mesh plate, 8, air switch, 9, current transformer, 10, control unit, 11, monitor, 12, limit block, 13, second spring, 14, vertical cylinder, 15, wire, 16, first spring, 17, straight rod, 18, high-strength glass, 19, door body, 20, rotating plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The existing device has a poor protection effect on the overcurrent detection equipment. If the water vapor concentration is too high, it will affect the normal operation of the detection equipment.

[0021] In view of this, an overcurrent detection device for subway power supply equipment is provided. Through the cooperation between the square shell, the first spring and the rotating plate, the outer shell is used to protect and seal the electronic equipment, and the absorption of water vapor inside the outer shell is achieved to avoid excessive internal water vapor concentration affecting the normal operation of internal electronic components, thereby solving the problem that the existing device has poor protection effect on overcurrent detection equipment and that if the water vapor concentration is too high, it will affect the normal operation of the detection equipment.

[0022] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0023] Embodiment 1: Figure 1-3It can be seen that an overcurrent detection device for subway power supply equipment includes a shell 1, the inner side of the shell 1 is movably connected to a back plate 3, the front of the back plate 3 is installed with a monitor 11, a current transformer 9 and an air switch 8, and the two sides of the shell 1 are penetrated by wires 15, one side of the two sides of the wire 15 is connected to the power supply facilities, and the other side is connected to the general electrical equipment, and multiple wires 14 are connected to the monitor 11 and the air switch 8 and other structures to realize a closed loop. The specific connection method is not limited. The outer side of the wire 15 is electrically connected to the monitor 11 and the air switch 8. The model of the monitor 11 is SO-200B, which can detect voltage and current. The outer side of the wire 15 runs through the inner side of the current transformer 9. The current transformer 9 is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. The number of turns of its primary side winding is very small, and it is connected in series in the circuit of the current to be measured, so as to realize the measurement of the current. A control unit 10 is installed on the front of the back plate 3, and the control unit 10 includes a processor and other structures, which can process the monitoring information. An auxiliary mechanism is arranged inside the shell 1, and the auxiliary mechanism includes a cover plate 4, a square shell 5, a mesh plate 7 and a desiccant bag 6. The outer side of the cover plate 4 is movably connected with the inner upper groove of the shell 1, and the cover plate 4 can move in the inner upper groove of the shell 1. A square shell 5 is installed at the bottom of the cover plate 4, and a mesh plate 7 is installed at the bottom through hole of the square shell 5. A desiccant bag 6 is arranged inside the square shell 5, and the desiccant bag 6 can absorb the water vapor inside the shell 1.

[0024] In the specific implementation process, it is worth pointing out that, through the cooperation between the square shell 5, the mesh plate 7 and the moisture absorbent bag 6, the housing 1 is used to protect and seal the electronic device, and the water vapor inside the housing 1 is absorbed to avoid the excessive concentration of internal water vapor affecting the normal operation of the internal electronic components, thereby solving the problem that the existing device has a poor protection effect on the overcurrent detection device, and if the water vapor concentration is too high, it will affect the normal operation of the detection device;

[0025] Furthermore, a rotating plate 20 is attached to the bottom of the cover plate 4 and the upper inner side of the housing 1. A straight rod 17 is rotatably connected to one side of the rotating plate 20 through a bearing. The top of the straight rod 17 is fixedly connected to the upper inner side of the housing 1. The outer side of the straight rod 17 is movably connected to a first spring 16. The two ends of the first spring 16 are respectively fixedly connected to the bottom of the rotating plate 20 and the lower part of the straight rod 17.

[0026] In the specific implementation process, it is worth pointing out that the device can drive the rotating plate 20 to fit under the cover plate 4 for limiting by relying on the elastic deformation of the first spring 16;

[0027] Specifically, when the overcurrent detection device for subway power supply equipment is used, the desiccant bag 6 can absorb the water vapor inside the shell 1. When the desiccant bag 6 needs to be replaced, the rotating plate 20 can be rotated to separate from the cover plate 4 and taken out downward.

[0028] Embodiment 2: By Figure 1 , 2 As can be seen from Figure 4, the upper and lower sides of the back plate 3 are both fitted with two limit plates 2 fixedly connected to the inner walls of the housing 1;

[0029] In the specific implementation process, it is worth pointing out that the plurality of limiting plates 2 can limit the back plate 3;

[0030] Furthermore, the front side of the limit plate 2 is fitted with a limit block 12, the outer side of the limit block 12 is movably connected with a vertical tube 14, the outer side of the vertical tube 14 is fixedly connected to the inner side of the limit plate 2, and the top of the limit block 12 is fixedly connected to the inner upper side of the vertical tube 14 through a second spring 13;

[0031] In the specific implementation process, it is worth pointing out that the device can drive the limit block 12 to fit on the front side of the back plate 3 for limiting by relying on the elastic deformation of the second spring 13;

[0032] Furthermore, a door body 19 is fixed to the front of the housing 1 by bolts, and a high-strength glass 18 is provided on the front of the door body 19;

[0033] In the specific implementation process, it is worth pointing out that the high-strength glass 18 does not affect the user's observation of the value on the monitor 11, and the display screen of the monitor 11 corresponds to the position of the high-strength glass 18;

[0034] Specifically, on the basis of the above-mentioned first embodiment, through the cooperation between the back plate 3, the limit block 12 and the second spring 13, the device can be quickly installed, which saves the user's assembly time and improves work efficiency.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An overcurrent detection device for subway power supply equipment, comprising a housing (1), characterized in that: The inner side of the housing (1) is movably connected to a back plate (3), the front side of the back plate (3) is equipped with a monitor (11), a current transformer (9) and an air switch (8), both sides of the housing (1) are penetrated by wires (15), the outer side of the wires (15) is electrically connected to the monitor (11) and the air switch (8), the outer side of the wires (15) penetrates the inner side of the current transformer (9), the front side of the back plate (3) is equipped with a control unit (10), and the interior of the housing (1) is provided with an auxiliary mechanism; The auxiliary mechanism comprises a cover plate (4), a square shell (5), a mesh plate (7) and a moisture absorbent bag (6); The outer side of the cover plate (4) is movably connected to the inner upper groove of the outer shell (1); a square shell (5) is installed at the bottom of the cover plate (4); a mesh plate (7) is installed in the bottom through hole of the square shell (5); and a moisture absorbent bag (6) is arranged inside the square shell (5).

2. The overcurrent detection device for subway power supply equipment according to claim 1 is characterized in that: A rotating plate (20) is fitted between the bottom of the cover plate (4) and the upper inner side of the outer shell (1); one side of the rotating plate (20) is rotatably connected to a straight rod (17) via a bearing; the top of the straight rod (17) is fixedly connected to the upper inner side of the outer shell (1); the outer side of the straight rod (17) is movably connected to a first spring (16); two ends of the first spring (16) are respectively fixedly connected to the bottom of the rotating plate (20) and the lower side of the straight rod (17).

3. The overcurrent detection device for subway power supply equipment according to claim 1 is characterized in that: Two limit plates (2) fixedly connected to the inner walls of the outer shell (1) are attached to the upper and lower sides of the back plate (3).

4. The overcurrent detection device for subway power supply equipment according to claim 3 is characterized in that: The front side of the limit plate (2) is fitted with a limit block (12), the outer side of the limit block (12) is movably connected to a vertical tube (14), the outer side of the vertical tube (14) is fixedly connected to the inner side of the limit plate (2), and the top of the limit block (12) is fixedly connected to the upper inner side of the vertical tube (14) via a second spring (13).

5. The overcurrent detection device for subway power supply equipment according to claim 1 is characterized in that: The front side of the housing (1) is fixedly connected to a door body (19) by means of bolts, and the front side of the door body (19) has a high-strength glass (18).

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