CN217240236U - Mining flame-proof dry-type transformer and mining flame-proof mobile substation - Google Patents

Abstract

The application discloses a mining explosion-proof dry-type transformer, which comprises a box shell, a high-voltage outlet box, a low-voltage outlet box, a high-voltage tapping box and a low-voltage tapping box; a transformer body is arranged in the box shell, a high-voltage wiring terminal is arranged in the high-voltage wire outlet box, a low-voltage wiring terminal is arranged in the low-voltage wire outlet box, and the high-voltage tapping box and the low-voltage tapping box are arranged at the top of the box shell; the high-voltage tapping box can adjust the number of turns of a coil of the transformer body connected with the high-voltage binding post, so that the transformation ratio is changed; the low-voltage tapping box can change the connection mode of the low-voltage side of the transformer body to obtain line voltage or phase voltage; the mining explosion-proof dry-type transformer can provide power for various power equipment and various electric devices in a coal mine. The application also discloses a mining explosion-proof mobile substation, which comprises a box shell, a high-voltage vacuum distribution device, a low-voltage protection box, a high-voltage tapping box and a low-voltage tapping box; the two ends of the box shell are respectively provided with a high-voltage vacuum distribution device and a low-voltage protection box, and the mobile substation can be directly used as power supply equipment.

Description

Mining flame-proof dry-type transformer and mining flame-proof mobile substation

Technical Field

The application relates to the technical field of transformers, in particular to a mining explosion-proof dry-type transformer and a mining explosion-proof mobile substation.

Background

The power converter used under the mine has high safety performance requirements on one hand, and needs to ensure operability on the other hand so that an operator can rapidly install, debug or overhaul the power converter under the mine.

Disclosure of Invention

The application aims to overcome the defects in the prior art and provide the mining explosion-proof dry-type transformer and the mining explosion-proof mobile substation.

In order to realize the technical purpose, the application provides a mining flame-proof dry-type transformer, including: the box shell is used for accommodating the ware body; the high-voltage wire outlet box is connected with one end of the box shell, a high-voltage wiring terminal is arranged in the high-voltage wire outlet box, and the high-voltage wiring terminal is used for a high-voltage lead at the high-voltage side of the connector body; the low-voltage wire outlet box is connected with the other end of the box shell, a low-voltage wiring terminal is arranged in the low-voltage wire outlet box, and the low-voltage wiring terminal is used for a low-voltage lead on the low-voltage side of the connector body; the high-voltage tapping box is arranged at the top of the box shell and used for adjusting the number of turns of the coils of the connected transformer body; and the low-voltage tapping box is arranged at the top of the box shell and used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

Furthermore, the box shell is formed by welding steel plates.

Further, the enclosure includes: the top plate is arc-shaped, and the high-voltage tapping box and the low-voltage tapping box are arranged on the top plate; the bottom plate is arc-shaped and is arranged opposite to the top plate; the side plate is connected with the top plate and the bottom plate and is a corrugated plate.

Furthermore, reinforcing ribs are arranged on the top plate, the bottom plate, the high-voltage outlet box and/or the low-voltage outlet box.

Further, the high voltage outlet box and/or the low voltage outlet box comprises: the outlet box is used for mounting a high-voltage wiring terminal or a low-voltage wiring terminal; the cover is used for shielding the end opening of the box shell, and the outlet box is arranged on the cover; a cover rim disposed around the cover portion; the box shell comprises a box edge, and the box edge is arranged around an end opening of the box shell; when the high-voltage outlet box is connected with one end of the box shell or the low-voltage outlet box is connected with the other end of the box, the cover edge is in contact with and fixedly connected with the box edge.

Furthermore, the high-voltage outlet box and/or the low-voltage outlet box also comprises a box cover, an opening is formed in one side of the outlet box, which is far away from the box shell, and the box cover is used for shielding the opening;

and/or the high-voltage outlet box and/or the low-voltage outlet box also comprise outlet sleeves, and the outlet sleeves are communicated with the outlet boxes;

and/or the high-voltage outlet box and/or the low-voltage outlet box also comprise lifting lugs so as to facilitate the hoisting operation.

Furthermore, a wire holder is arranged in the high-voltage wire outlet box and/or the low-voltage wire outlet box and is used for connecting a controller.

Further, the high-voltage wiring terminal is connected with the high-voltage lead through a cable; and/or the low-voltage wiring terminal is connected with the low-voltage lead through a copper bar.

Furthermore, the mining explosion-proof dry-type transformer also comprises an edge roller trolley, and the edge roller trolley is arranged at the bottom of the box shell.

The application also provides a mining flame-proof type mobile substation, includes: the box shell is used for accommodating the ware body; the high-voltage vacuum power distribution device is used for the high-voltage side of the connector body; the low-voltage protection box is used for the low-voltage side of the connector body; the high-voltage tapping box is arranged at the top of the box shell and used for adjusting the number of turns of the coils of the connected transformer body; and the low-voltage tapping box is arranged at the top of the box shell and used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

The application provides a mining explosion-proof dry-type transformer, which comprises a box shell, a high-voltage outlet box, a low-voltage outlet box, a high-voltage tapping box and a low-voltage tapping box; a transformer body is arranged in the box shell and used for realizing voltage transformation; a high-voltage wiring terminal is arranged in the high-voltage wire outlet box, a low-voltage wiring terminal is arranged in the low-voltage wire outlet box, and the high-voltage tapping box and the low-voltage tapping box are arranged at the top of the box shell; the high-voltage tapping box can adjust the number of turns of a coil of a transformer body connected with the high-voltage wiring terminal, so that the transformation ratio is changed to adjust the output secondary voltage; the low-voltage tapping box can change the star-delta connection mode of a low-voltage side winding of the transformer body to obtain line voltage or phase voltage; the mining explosion-proof dry-type transformer can provide power for various power equipment and various electric devices in a coal mine, and is simple in structure and high in applicability.

The application also provides a mining explosion-proof mobile substation, which comprises a box shell, a high-voltage vacuum distribution device, a low-voltage protection box, a high-voltage tapping box and a low-voltage tapping box; the two ends of the box shell are respectively provided with a high-voltage vacuum power distribution device and a low-voltage protection box, and the mobile substation can be directly used as power supply equipment; by arranging the high-voltage tapping box at the top of the box shell, an operator can conveniently and quickly adjust the number of turns of the coils of the connected transformer body according to the preset output voltage, so that the transformation ratio of the transformer is changed, and the secondary voltage is improved or reduced; through setting up the low pressure tapping box at the top of case shell, according to the rated voltage of using electrical apparatus or the needs of power consumption environment, operating personnel can be convenient, fast with the secondary voltage adjustment of output for line voltage or looks voltage.

Drawings

FIG. 1 is a schematic structural diagram of a mining explosion-proof dry-type transformer provided by the application;

FIG. 2 is a schematic cross-sectional structure view of the mining flameproof dry-type transformer shown in FIG. 1;

FIG. 3 is a schematic left-view structural diagram of the mining explosion-proof dry-type transformer shown in FIG. 1;

FIG. 4 is a schematic diagram of a right-view structure of the mining explosion-proof dry-type transformer shown in FIG. 1;

FIG. 5 is a connection mode of a high-voltage side of a transformer body of the mining explosion-proof dry-type transformer shown in FIG. 1;

FIG. 6 is a schematic view of a high voltage breakout box provided herein;

FIG. 7 is a connection mode of a low-voltage side of a body of the mining explosion-proof dry-type transformer shown in FIG. 1;

fig. 8 is a schematic view of a low voltage tap box according to the present application;

fig. 9 is a schematic structural diagram of a mining explosion-proof mobile substation provided by the application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The application provides a mining flame-proof type dry-type transformer, includes: a case 10 for housing the body; the high-voltage wire outlet box 20 is connected with one end of the box shell 10, a high-voltage wiring terminal 1 is arranged in the high-voltage wire outlet box 20, and the high-voltage wiring terminal 1 is used for a high-voltage lead on the high-voltage side of the connector body; the low-voltage outlet box 30 is connected with the other end of the box shell 10, a low-voltage wiring terminal 2 is arranged in the low-voltage outlet box 30, and the low-voltage wiring terminal 2 is used for a low-voltage lead on the low-voltage side of the connector body; the high-voltage tapping box 3 is arranged at the top of the box shell 10 and used for adjusting the number of turns of coils of the connected transformer body; and the low-voltage tapping box 4 is arranged at the top of the box shell 10 and used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

Wherein, the ware body is the main functional part of transformer. The transformer body comprises an iron core, a low-voltage coil is wound outside the iron core, and a high-voltage coil is wound outside the low-voltage coil; according to the principle of electromagnetic induction, the transformer body can convert alternating voltage and current of one grade flowing through into voltage and current of another grade at the same frequency, thereby realizing transformation.

Optionally, the vessel body is suspended within the enclosure 10. For example, the body is suspended in the housing 10; for another example, a mounting bracket is provided in the cabinet 10, and the body is provided on the mounting bracket so as to be spaced apart from the inner wall of the cabinet 10.

In one embodiment, the body is spaced 10cm from the inner wall of the housing 10. Through setting up ware body and case shell 10 interval, the interval can play insulating effect, avoids flowing through the electric current entering case shell 10 of ware body, leads to the short circuit or causes the safety problem.

The application provides a case shell 10 of mining flame-proof type dry-type transformer sets up to the side opening mode. Referring specifically to fig. 1 and 2, in the illustrated embodiment, the left and right sides of the enclosure 10 each have an opening, wherein the left port of the enclosure 10 is a high voltage outlet and the right port is a low voltage outlet.

Referring collectively to fig. 3, one arrangement of the high voltage terminals 1 is illustrated. Wherein, be equipped with three high-voltage terminal A, B, C in the high-voltage outlet box 20, three high-voltage terminal A, B, C is isosceles triangle and arranges, is favorable to controlling electric clearance and creepage distance.

Referring collectively to fig. 4, an arrangement of low voltage terminals 2 is illustrated. Wherein, be equipped with three low pressure terminal a, b, c in the low pressure outlet box 30, because low pressure side voltage is little, three low pressure terminal a, b, c linear arrangement.

Referring to fig. 2 and 5 in combination, a connection of a body and a high voltage wire post is illustrated. The body is connected with three high-voltage terminals A, B, C and a high-voltage tapping box 3 through cables L. Referring to fig. 6, a structure of a high-voltage tapping box 3 is illustrated, and the high-voltage tapping box 3 includes a high-voltage tapping plate, and three groups of connecting pieces X1-Y1-Z1, X2-Y2-Z2, and X3-Y3-Z3 are disposed on the high-voltage tapping plate.

The input voltage of the mining explosion-proof dry-type transformer can adapt to the line voltage of +5% or-5% of the rated voltage.

In one embodiment, the nominal voltage is 10kv or 6 kv. If the high-voltage input tapping voltage needs to be changed, the positions of connecting pieces on the high-voltage tapping plate are changed according to the following table under the condition that the transformer is confirmed to be uncharged.

It should be noted that, in order to ensure safe use, when the mining explosion-proof dry-type transformer provided by the application leaves a factory, the connecting sheet of the high-voltage tapping box 3 is uniformly located at the position of X2-Y2-Z2, that is, the connecting sheet is located at the rated input voltage of 10kv or 6 kv.

Optionally, the cable L is a silicone rubber cable.

Referring to fig. 2 and 7 in combination, a connection of the body to the low voltage wire post is illustrated. The transformer body is respectively connected with the three low-voltage binding posts and the low-voltage tapping box 4 through lead copper bars T. With reference to fig. 8, a structure of a low pressure tapping box 4 is illustrated, the low pressure tapping box 4 includes a low pressure tapping plate, and six contact screws a, b, c and x, y, z are provided on the low pressure tapping plate; under the condition that the transformer is not electrified, connecting sheets of the low-voltage tapping box 4 are connected according to the y-connection state shown in fig. 8, and the line voltage can be obtained; connecting sheets of the low-voltage tapping box 4 are connected according to a d-connection state shown in fig. 8, and phase voltage can be obtained; thereby meeting the requirements of different electrical appliances or electrical environments.

The mining explosion-proof dry-type transformer is mainly used under a coal mine and can be used as a three-phase power system with the rated frequency of 50Hz, the rated primary voltage of 6kV or 10kV, the rated secondary voltage of 380V or 660V or 1140V and a neutral point which is not directly grounded. The mining explosion-proof dry-type transformer can provide power for various power equipment and various electric devices in a coal mine, and is simple in structure and high in applicability.

Meanwhile, because the high-voltage tapping box 3 and the low-voltage tapping box 4 are both arranged at the top of the box shell 10, in the processes of installation, debugging, maintenance and the like, an operator can conveniently observe and operate the high-voltage tapping box 3 and the low-voltage tapping box 4, and the use is safer.

The transformer that is used in the pit in colliery is higher to the requirement of security performance, especially needs to guarantee when destructive condition such as the inside condition of generating a fire or explosion of equipment, the condition of a fire can not stretch to the outside, still need to guarantee when destructive condition such as the outside condition of generating a fire or explosion of equipment, the condition of a fire can not influence inside the equipment.

To this end, the enclosure 10 is optionally welded from sheet steel.

In one embodiment, the enclosure 10 employs a Q235 board. The Q235 plate is made of carbon steel, is easy to process and good in extensibility, and can effectively protect the transformer body.

In addition, a large amount of heat is generated in the working process of the transformer, and in order to avoid that the service life of equipment is influenced, the equipment is damaged or dangerous situations are caused due to overhigh temperature, the case shell 10 needs to have better heat dissipation performance.

To this end, in one embodiment, enclosure 10 includes: the top plate 11 is arc-shaped, and the high-voltage tapping box 3 and the low-voltage tapping box 4 are arranged on the top plate 11; the bottom plate 12 is arc-shaped, and the bottom plate 12 is opposite to the top plate 11; and the side plate 13 is connected with the top plate 11 and the bottom plate 12, and the side plate 13 is a corrugated plate.

It should be added that the cabinet 10 includes two side panels 13 connected to respective sides of the top panel 11 and the bottom panel 12 (for example, in the embodiment shown in fig. 1, the two side panels 13 are spaced apart in a direction perpendicular to the plane of the paper); the box shell 10 is substantially in a cylindrical shape with two ends opened in the horizontal direction, and the end part of the box shell 10 is opened for connecting the high-voltage outlet box 20 and the low-voltage outlet box 30.

In a specific embodiment, referring to fig. 1 or 2, the top plate 11 is bent upward and the bottom plate 12 is bent downward, and the top plate 11 and the bottom plate 2 are symmetrically arranged; the side plate 13 is a corrugated plate, and raised parts are arranged on the side plate 13 at intervals.

The top plate 11 and the bottom plate 12 are arc-shaped plates, so that the internal space of the box shell 10 can be increased conveniently, and the temperature diffusion in the box shell 10 is facilitated; on the other hand, under the condition of the same width, the surface areas of the top plate 11 and the bottom plate 12 are larger, so that the contact areas of the external environment and the top plate 11 and the bottom plate 12 are increased, and the temperature exchange is facilitated.

In a similar way, the side plates 13 are corrugated plates, so that the heat dissipation area can be increased. Meanwhile, the part protruding outwards can also play the effect of anticollision and resistance to compression.

Optionally, the top plate 11 and/or the bottom plate 12 has a thickness of 6 mm.

Optionally, the radius of the arc of the top plate 11 and/or the bottom plate 12 is 500 mm.

Optionally, the side plates 13 are 4mm thick.

Optionally, a hanging plate 15 is arranged on the enclosure 10, and the hoisting equipment can extract the enclosure 10 through the hanging plate 15, so that the enclosure 10 or the whole transformer can be conveniently transferred.

Optionally, the top plate 11 and/or the bottom plate 12 are provided with reinforcing ribs 5, so that the structure of the top plate 11 or the structure of the bottom plate 12 can be reinforced, and the functions of collision prevention, deformation prevention and the like can be achieved.

Alternatively, the housing 10 is fixed to the high voltage outlet box 20 and the low voltage outlet box 30 by welding. After the box shell 10 is fixedly connected with the high-voltage outlet box 20 and the low-voltage outlet box 30, a 1MPa positive pressure water pressure test can be tested, the test time is ensured to be not less than 1min, welding seams do not leak, and the box body does not generate permanent deformation, so that the box shell 10 can be seen as qualified.

Optionally, the housing 10 includes a rim 14, the rim 14 being disposed around an end opening of the housing 10 for connecting the high voltage outlet box 20 and the low voltage outlet box 30.

One surface of the box edge 14 used for being connected with the high-voltage outlet box 20 or the low-voltage outlet box 30 needs to be set to be an explosion-proof surface, and the requirements are in accordance with standards Q/320201AAEA05-2010 and Q/320201AAEA 06-2016. Because the explosion-proof surface has the requirements of smoothness, width, clearance and the like, when the box edge 14 is welded with the top plate 11, the bottom plate 12 and the side plate 13, the box edge 14 is prevented from deforming as much as possible, so that the clearance between the explosion-proof surface and the high-voltage outlet box 20 or the low-voltage outlet box 30 is ensured to meet the explosion-proof requirements GB/T3836 and GB 8286-2005.

In order to meet the safety of the transformer used under mine, the high-voltage outlet box 20 and the low-voltage outlet box 30 need to be connected with an opening at the end part of the box shell 10 in an explosion-proof manner; meanwhile, the high-voltage outlet box 20 and the low-voltage outlet box 30 also need to be capable of realizing the installation of the high-voltage binding post 1 and the low-voltage binding post 2.

In one embodiment, the high voltage outlet box 20 and/or the low voltage outlet box 30 includes: the outlet box 21 is used for installing the high-voltage wiring terminal 1 or the low-voltage wiring terminal 2; a cover part 22 for covering the end opening of the box case 10, and the outlet box 21 is provided on the cover part 22; a cover rim 23 disposed around the cover portion 22; when the high voltage outlet box 20 is connected to one end of the housing 10 or when the low voltage outlet box 30 is connected to the other end of the housing 10, the cover rim 23 contacts and is fixedly connected to the case rim 14.

Referring to fig. 1 to 4, in the embodiment shown in the figure, a mounting hole is formed on the cover 22, and the outlet box 21 is inserted into the mounting hole and welded and fixed to the cover 22. The cover part 22 and the cover rim 23 are of an integral structure, the cover rim 23 is the outermost ring of the cover part 22 and is used for being connected with the box rim 14, and the thickness of the cover rim 23 is larger than that of the cover part 22. The box bottom of the outlet box 21 close to the box shell 10 is provided with a through hole, part of the high-voltage wiring terminal 1 or the low-voltage wiring terminal 2 penetrates through the through hole, extends into the box shell 10 and is used for a connector body, and the other part of the high-voltage wiring terminal 1 or the low-voltage wiring terminal 2 is positioned in the outlet box 21 and is used for connecting power supply equipment and electric equipment.

One surface of the cover edge 23, which is used for contacting the box edge 14, needs to be an explosion-proof surface. After the cover edge 23 and the box edge 14 are in explosion-proof connection, the gap between the cover edge and the box edge needs to meet the requirement of explosion-proof.

Optionally, rust prevention measures need to be taken on the plane explosion-proof surface, and cold phosphating treatment is carried out on the explosion-proof surface.

Optionally, the cover rim 23 and the box rim 14 are correspondingly provided with screw holes to facilitate the fastening of the two by bolts.

Optionally, the high-voltage terminal 1 or the low-voltage terminal 2 is connected with the box shell 10 through a threaded explosion-proof structure, wherein the number of joggles is not less than six.

Optionally, reinforcing ribs 5 are provided on the high voltage outlet box 20 and/or the low voltage outlet box 30. Referring specifically to fig. 3 or 4, in the illustrated embodiment, the surface of the cover 22 facing away from the housing 10 is provided with a stiffener 5 for reinforcing the cover (high voltage outlet box 20 or low voltage outlet box 30), so as to enhance the strength of the cover and protect the cover.

Alternatively, the reinforcing ribs 5 are provided on the surface of the lid portion 22 by staggered intermittent fillet welding.

Optionally, the misalignment between the outlet box 21 and the cover 22 is less than or equal to 1.5 mm.

Optionally, the high voltage outlet box 20 and/or the low voltage outlet box 30 further include a box cover 24, and the side of the outlet box 21 away from the box housing 10 is provided with an opening, and the box cover 24 is used for shielding the opening.

The box cover 24 can be rotatably disposed at one side of the opening through a rotating shaft, a hinge, and the like, and an operator can easily rotate the box cover 24 to open or shield the opening as required. Alternatively, the cover 24 can be slidably disposed at the opening, and when necessary, the operator can push the cover 24 to move away from or close to the opening. Still alternatively, the box cover 24 is connected to a driving mechanism (e.g. an air cylinder, an electric cylinder) and can be driven by the driving mechanism to approach the opening to block the opening, or to move away from the opening to open the opening.

When the opening is opened, an operator can easily install, overhaul or maintain the structure in the outlet box 21; when the opening is shielded, the structure in the outlet box 21 can be protected, and the use safety can be improved.

Optionally, a handle is provided on the lid 24 to facilitate the application of force by the operator.

Optionally, the high voltage outlet box 20 and/or the low voltage outlet box 30 further include a cable lead-in device 25, the cable lead-in device 25 is communicated with the outlet box 21, and a cable connected with the high voltage binding post 1 or the low voltage binding post 2 can extend into the outlet box 21 through the cable lead-in device 25.

Referring specifically to fig. 1, in the illustrated embodiment, a cable lead-in device 25 is disposed on each of the high voltage outlet box 20 and the low voltage outlet box 30, and the cable lead-in device 25 is connected to the lower surface of the outlet box 21. The cable leading-in device 25 is a hollow tubular structure, one end of the cable can extend into the outlet box 21 through the cable leading-in device 25 and is connected with the high-voltage wiring terminal 1 or the low-voltage wiring terminal 2, and the other end of the cable is used for connecting power supply equipment or electric equipment.

The cable lead-in device 25 can limit the installation position of the cable so as to facilitate the installation of the cable by an operator, and can also protect the connection position of the cable and the high-voltage wiring terminal 1 or the low-voltage wiring terminal 2 from bending or abrasion.

Further, in the embodiment shown in fig. 1, the cable lead-in device 25 extends obliquely in a direction away from the cabinet 10, so that a cable can directly face the high-voltage terminal 1 or the low-voltage terminal 2 through the cable lead-in device 25 extending into the cabinet 10, and thus the connection is facilitated.

Specifically, in use, a high voltage power supply is connected to the high voltage terminal 1 on the high voltage side through the cable and cable lead-in device 25; according to actual needs, a high-voltage primary rated voltage is input, the magnitude of low-voltage output voltage is measured, if the difference between the output voltage and a preset voltage value is large, high-voltage tapping is adjusted in time through a high-voltage tapping box 3, and whether the transformer works normally is checked.

Optionally, the high voltage outlet box 20 and/or the low voltage outlet box 30 also include lifting lugs 26 to facilitate the lifting operation.

In one embodiment, after the high voltage outlet box 20 or the low voltage outlet box 30 is connected to the enclosure 10, the lifting lugs 26 on the enclosure cover are connected to the hanger plates 15 on the enclosure 10. On one hand, the rigidity of the whole hoisting structure can be enhanced, and the hoisting structure is prevented from being damaged or deformed in the hoisting process; on the other hand, the influence of uneven stress on the connection stability of the box cover and the box shell 10 during hoisting can be avoided.

Furthermore, two lifting lugs 26 are arranged on the high-voltage outlet box 20 and the low-voltage outlet box 30, and the lifting lugs 26 on the high-voltage outlet box 20 and the low-voltage outlet box 30 are in one-to-one correspondence and are symmetrical to each other; meanwhile, four hanging plates 15 are correspondingly arranged on the box shell 10. When lifting, four hoisting structures are simultaneously extracted by the hoisting equipment, so that the stress uniformity of the whole transformer is ensured.

Optionally, a wire holder 6 is further provided in the high voltage outlet box 20 and/or the low voltage outlet box 30, and the wire holder 6 is used for connecting a controller.

Referring specifically to fig. 2-4, in the illustrated embodiment, a wire holder 6 is disposed in each of the high voltage outlet box 20 and the low voltage outlet box 30, and the wire holder 6 is disposed in the outlet box 21 and below the terminal (the high voltage terminal 1 or the low voltage terminal 2).

Further, four terminals are arranged on the wire holder 6, wherein two terminals are connected with the high-low voltage interlocking wire, and the other two terminals are connected with the temperature controller. When the transformer is used, an operator can know the working condition of the transformer through the controller and can adjust the working parameters of the transformer when necessary.

It is to be explained that temperature is an important monitoring parameter for whether the transformer is working properly. For this purpose, a temperature monitoring device (also referred to as a temperature control switch) is also provided in the cabinet 10. In a specific embodiment, a 125 +/-5 ℃ temperature control switch is arranged in the box shell 10, and temperature controllers of the temperature control switch are normally open contacts; when the temperature inside case shell 10 is less than or greater than predetermined temperature range, temperature detect switch disconnection, and the controller can learn transformer work malfunction, reminds operating personnel to handle.

Optionally, for convenient reminding, a control line of the temperature control switch can be introduced into the tail end of the low-voltage protection box 9 and connected with a 127V/0.3A sound alarm; when the temperature is abnormal, the controller can control the sound alarm to give an alarm. Alternatively, the control line of the temperature-dependent switch can be led to the high-voltage vacuum distribution device 8 to achieve overtemperature protection.

Alternatively, the high-voltage terminal 1 is connected to a high-voltage lead on the high-voltage side of the body through a cable.

Optionally, the low-voltage terminal 2 is connected with a low-voltage lead on the low-voltage side of the transformer body through a copper bar.

Optionally, the mining explosion-proof dry-type transformer further comprises an edge roller trolley 7, and the edge roller trolley 7 is arranged at the bottom of the box shell 10.

Referring specifically to fig. 1 or 2, the rim trolley 7 includes four rollers arranged at four corners, and the housing 10 is disposed on the rim trolley 7. When in use, the track can be laid on the ground, so that the roller rolls along the track; alternatively, the edge roller trolley 7 can be directly rolled on the ground to realize the movement of the transformer.

Optionally, M12 bolts for grounding outside the cabinet 10 are symmetrically arranged on both sides of the lower part of the cabinet 10, and a "┷" grounding symbol is provided for connecting an external grounding wire.

The application also provides a mining flame-proof type mobile substation, can refer to fig. 9, include: a case 10 for housing the body; a high-voltage vacuum distribution device 8 for the high-voltage side of the connector body; a low-voltage protection box 9 for a low-voltage side of the connector body; the high-voltage tapping box 3 is arranged at the top of the box shell 10 and used for adjusting the number of turns of coils of the connected transformer body; and the low-voltage tapping box 4 is arranged at the top of the box shell 10 and used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

Different from the transformer, the mobile substation is provided with a high-voltage vacuum distribution device 8 and a low-voltage protection box 9 at two ends of a box shell 10 provided with a transformer body, and the mobile substation can be directly used as power supply equipment.

Through setting up high voltage tapping box 3 at the top of case shell 10, according to predetermined output voltage, operating personnel can be convenient, adjust the coil number of turns of the ware body of inserting fast, and then change the transformation ratio of transformer to improve or reduce secondary voltage.

Through setting up low pressure tapping box 4 at the top of case shell 10, according to the rated voltage of using electrical apparatus or the needs of power consumption environment, operating personnel can be convenient, fast with the secondary voltage adjustment of output for line voltage or looks voltage.

The application provides a mobile substation uses more conveniently, the suitability is better.

Specifically, the high-voltage vacuum power distribution device 8 includes a disconnecting switch and a high-voltage vacuum circuit breaker, and thus, the high-voltage vacuum power distribution device 8 has both the function of electric opening and closing and the function of manual closing. The high-voltage vacuum power distribution device 8 can meet multiple protection functions of the high-voltage side of the transformer body, such as short circuit, overload, phase failure, low voltage, overvoltage, self-checking and the like. When a problem occurs on the high-voltage side, the high-voltage vacuum circuit breaker can automatically trip and protect. Meanwhile, when the mobile substation is manually transported, installed, maintained and the like, an operator can actively switch on and off through the isolating switch, and the operation safety is ensured.

The low-voltage protection box 9 can detect faults of the low-voltage side of the transformer body, such as short circuit, overload, electric leakage, low voltage, overvoltage, self-checking and the like, when the low-voltage protection box 9 detects equipment faults, the faults can be fed back to the high-voltage vacuum power distribution device 8 of the high-voltage side, and the high-voltage vacuum circuit breaker performs tripping operation, so that the breaking current during opening is effectively reduced, and the service life of the switch is prolonged.

Optionally, a reliable electrical interlock is provided between the high voltage vacuum distribution device 8 and the low voltage protection box 9: when the door of the low-voltage protection box 9 is opened, the high-voltage vacuum power distribution device 8 cannot be switched on; when the fault on the low-voltage side is not released, the high-voltage vacuum power distribution device 8 cannot be switched on; the high-voltage vacuum power distribution device 8 can be switched on only when the low-voltage protection box 9 is in a normal working state.

Specifically, the mobile substation consists of a dry-type transformer for the mine explosion-proof mobile substation, a high-voltage vacuum distribution device and a low-voltage protection box, wherein a high-voltage primary power supply is connected to the high-voltage side of the dry-type transformer through a cable leading-in device of the high-voltage vacuum distribution device; the low-voltage side power supply of the dry type transformer is output through a cable leading-out device of the low-voltage protection box. When the vacuum distribution device and the low-voltage protection box are disassembled and the high-voltage outlet box and the low-voltage outlet box are respectively arranged on the two sides of the dry type transformer, the mine explosion-proof dry type transformer can be formed and used for various power equipment and electric devices.

It needs to be supplemented that, because the difference between the mining flameproof mobile substation and the mining flameproof dry-type transformer provided by the application lies in that the high-voltage outlet box 20 is replaced by the high-voltage vacuum distribution device 8, and the low-voltage outlet box 30 is replaced by the low-voltage protection box 9, the structure of the mining flameproof dry-type transformer can be embodied in the mining flameproof mobile substation, and specific description is omitted.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A mining flame-proof type dry-type transformer is characterized by comprising:

a housing (10) for accommodating the body;

the high-voltage wire outlet box (20) is connected with one end of the box shell (10), a high-voltage wiring terminal (1) is arranged in the high-voltage wire outlet box (20), and the high-voltage wiring terminal (1) is used for connecting a high-voltage lead on the high-voltage side of the transformer body;

the low-voltage wire outlet box (30) is connected with the other end of the box shell (10), a low-voltage wiring terminal (2) is arranged in the low-voltage wire outlet box (30), and the low-voltage wiring terminal (2) is used for being connected with a low-voltage lead on the low-voltage side of the transformer body;

the high-voltage tapping box (3) is arranged at the top of the box shell (10) and is used for adjusting the number of turns of the coils of the connected transformer body;

and the low-voltage tapping box (4) is arranged at the top of the box shell (10) and is used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

2. The mining flame-proof dry-type transformer according to claim 1, characterized in that the enclosure (10) is welded by steel plates.

3. The mining flameproof dry transformer according to claim 1 or 2, characterized in that the enclosure (10) comprises:

the top plate (11), the top plate (11) is arc-shaped, and the high-voltage tapping box (3) and the low-voltage tapping box (4) are arranged on the top plate (11);

the bottom plate (12), the bottom plate (12) is arc-shaped, and the bottom plate (12) and the top plate (11) are arranged oppositely;

the side plate (13) is connected with the top plate (11) and the bottom plate (12), and the side plate (13) is a corrugated plate.

4. The mining flame-proof dry-type transformer according to claim 3, characterized in that the top plate (11), the bottom plate (12), the high-voltage outlet box (20) and/or the low-voltage outlet box (30) are provided with reinforcing ribs (5).

5. The mining flameproof dry-type transformer of claim 1, wherein the high-voltage outlet box (20) and/or the low-voltage outlet box (30) comprise(s):

the outlet box (21) is used for mounting the high-voltage binding post (1) or the low-voltage binding post (2);

a cover part (22) for shielding the end opening of the box shell (10), wherein the outlet box (21) is arranged on the cover part (22);

a cover rim (23) disposed around the cover portion (22);

wherein the cabinet shell (10) comprises a cabinet rim (14), the cabinet rim (14) being arranged around an end opening of the cabinet shell (10);

when the high-voltage outlet box (20) is connected with one end of the box shell (10), or when the low-voltage outlet box (30) is connected with the other end of the box shell (10), the cover edge (23) is in contact with the box edge (14) and is fixedly connected with the box edge.

6. The mining explosion-proof dry-type transformer according to claim 5, characterized in that the high-voltage outlet box (20) and/or the low-voltage outlet box (30) further comprises a box cover (24), an opening is formed in one side, away from the box shell (10), of the outlet box (21), and the box cover (24) is used for shielding the opening;

and/or the high-voltage outlet box (20) and/or the low-voltage outlet box (30) further comprise an outlet sleeve (25), and the outlet sleeve (25) is communicated with the outlet box (21);

and/or the high-voltage outlet box (20) and/or the low-voltage outlet box (30) further comprise lifting lugs (26) to facilitate hoisting operation.

7. The mining explosion-proof dry-type transformer according to claim 1, characterized in that a wire holder (6) is further arranged in the high-voltage outlet box (20) and/or the low-voltage outlet box (30), and the wire holder (6) is used for connecting a controller.

8. The mining flame-proof dry-type transformer according to claim 1, wherein the high-voltage wiring terminal (1) is connected with the high-voltage lead through a cable;

and/or the low-voltage wiring terminal (2) is connected with the low-voltage lead through a copper bar.

9. The mining flameproof dry-type transformer of claim 1, further comprising a rim roller trolley (7), wherein the rim roller trolley (7) is arranged at the bottom of the box shell (10).

10. A mining flame-proof type mobile substation is characterized by comprising:

a housing (10) for accommodating the body;

a high voltage vacuum distribution device (8) for connecting the high voltage side of the body;

a low-voltage protection box (9) for connecting the low-voltage side of the body;

the high-voltage tapping box (3) is arranged at the top of the box shell (10) and is used for adjusting the number of turns of the coils of the connected transformer body;

and the low-voltage tapping box (4) is arranged at the top of the box shell (10) and is used for realizing star-delta conversion so as to obtain line voltage or phase voltage.

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