A flameproof dry-type transformer for mining

Abstract

The present invention belongs to the technical field of mining transformers, and discloses a mining flameproof dry-type transformer. The mining flameproof dry-type transformer comprises a bottom plate, a mounting base is fixedly connected to the upper surface of the bottom plate, a transformer body is fixedly mounted on the upper surface of the mounting base, a flameproof shell is fixedly connected to the upper surface of the mounting base and located outside the transformer body, a first heat dissipation hole is opened on the top of the flameproof shell, and a movable sealing plate is arranged in the first heat dissipation hole. The mining flameproof dry-type transformer has a good heat dissipation effect, and can efficiently dissipate heat through the first heat dissipation hole and the second heat dissipation hole, ensuring that the internal transformer body has a good use environment when working. When the internal transformer body explodes due to a short circuit or a fault, the flame generated can be extinguished while ensuring a good flameproof effect to prevent secondary damage, thereby solving the problems raised in the background technology.

Description

Technical Field

[0001] The invention relates to the technical field of mining transformers, in particular to a mining explosion-proof dry-type transformer. Background Art

[0002] Dry-type transformers are widely used in places such as,,, and dock machinery and equipment. They are mainly composed of an iron core made of silicon steel sheets and a coil cast with epoxy resin. An insulating cylinder is placed between the high and low voltage coils to increase electrical insulation, and the coils are supported and restrained by pads. The fasteners for overlapping its components have anti-loosening properties.

[0003] Dry-type transformers will generate a certain amount of heat during normal operation, and the working environment is usually harsh, such as high dust and high temperature. If the oil or insulating material inside the dry-type transformer catches fire or thermally decomposes, it will cause serious consequences such as explosion and fire, which may cause huge losses to personnel and property. Therefore, existing mine dry-type transformers generally use flameproof transformers to prevent large losses caused by explosions or flames. However, the existing flameproof dry-type transformers have poor heat dissipation during use, and the internal dry-type transformer cannot be cooled in time, resulting in the difficulty of maintaining the operating temperature within the normal range. At the same time, it is difficult to extinguish the flames generated when an explosion occurs, which may cause secondary damage. Therefore, we designed a mine flameproof dry-type transformer. Summary of the invention

[0004] The purpose of the invention is to provide a mine-use flameproof dry-type transformer, which has a good heat dissipation effect, so that it can maintain a good heat dissipation effect when in use. At the same time, when an explosion occurs due to a short circuit or equipment failure, while ensuring a good flameproof effect, the flame generated by it can be extinguished to prevent secondary damage, thereby solving the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mine flameproof dry-type transformer comprises a bottom plate, a mounting base is fixedly connected to the upper surface of the bottom plate, a transformer body is fixedly mounted on the upper surface of the mounting base, a flameproof housing is fixedly connected to the upper surface of the mounting base and located outside the transformer body, a first heat dissipation hole is opened on the top of the flameproof housing, a movable sealing plate is arranged in the first heat dissipation hole, a heat dissipation fan is also fixedly mounted in the first heat dissipation hole, and an explosion-proof mechanism is arranged in the flameproof housing;

[0006] The explosion-proof mechanism comprises:

[0007] An airbag, the airbag being bonded to the inner top wall of the flameproof enclosure;

[0008] Dry powder, the dry powder is disposed in the airbag;

[0009] Slide rails, which are fixedly connected to the left and right sides of the inner wall of the flameproof enclosure;

[0010] A slider, wherein the slider is slidably connected in the slide rail;

[0011] A support plate, wherein the support plate is disposed below the airbag, and both ends of the support plate are fixedly connected to corresponding sliders;

[0012] A thorn cone, wherein the thorn cone is fixedly connected to the upper surface of the support plate;

[0013] A fuse rope, the two ends of which are fixedly connected to the lower surface of the slider and the lower surface of the support plate respectively;

[0014] The outer side of the explosion-proof mechanism is provided with a second heat dissipation hole;

[0015] A fixing assembly is arranged on the upper surface of the mounting base and outside the flameproof enclosure.

[0016] Through the above technical scheme, the present application can ensure that the transformer body has a good heat dissipation effect when working, ensure that its working temperature is kept within the control range, and at the same time, when the transformer body explodes or a short circuit generates a flame, the flame can be extinguished while ensuring the explosion-proof effect, thereby ensuring its safety in use.

[0017] Preferably, a hole matching the first heat dissipation hole is opened in the middle of the airbag, and the shape of the support plate is consistent with the shape of the airbag, and the material of the support plate is ceramic fiber material.

[0018] Through the above technical scheme, the shapes of the airbag and the support plate of the present application are adapted to the first heat dissipation hole, ensuring the normal heat dissipation effect of the first heat dissipation hole, so that the hot air passes through the hole between the airbag and the support plate and then is discharged through the first heat dissipation hole, and the support plate is made of lightweight and heat-resistant material. When the transformer body explodes, the impact generated rushes to the support plate, causing it to move upward to break the fuse rope and puncture the airbag, so that the internal dry powder is sprayed onto the transformer body for extinguishing. When the transformer body is short-circuited or fails without explosion and generates an open flame, the internal temperature and air pressure rise sharply, causing the support plate to move upward, and the high temperature generated will melt the fuse rope so that the spike on the support plate will puncture the airbag for extinguishing.

[0019] Preferably, a movable cavity is further provided in the flameproof casing, and the movable cavity is communicated with the second heat dissipation hole, a partition is movably connected in the movable cavity, a deformation spring is further provided in the movable cavity, and two ends of the deformation spring are respectively fixedly connected to the inner top wall of the movable cavity and the top of the partition, and a through hole is provided on the partition.

[0020] Through the above technical solution, the partition of the present application blocks the second heat dissipation hole when the transformer body is not in use to prevent external dust from entering the interior and causing an impact. The temperature generated when the transformer body is in use causes the deformation spring to shrink and deform due to the heat, driving the partition to move upward, and the through hole and the second heat dissipation hole are connected to dissipate heat, thereby ensuring a good heat dissipation effect.

[0021] Preferably, the partition is made of a heat-conducting material, the deformable spring is made of a Nitinol alloy, and the diameter of the through hole is consistent with the diameter of the second heat dissipation hole.

[0022] Preferably, the fixing assembly includes a threaded rod, a push rod, a limit rod, a limit groove, a fixing block, a tension spring and a rotating handle; a threaded rod is threadedly connected to the mounting base and located on the outer side of the explosion-proof casing; a push rod is inserted in the threaded rod; a limit rod is inserted in the outer side of the lower half of the threaded rod, and the limit rod extends into the threaded rod on a side close to the push rod; a limit groove is provided on the outer side of the threaded rod; a fixing block is slidably connected in the limit groove, and the fixing block is fixedly connected to the limit rod; a tension spring is also arranged in the limit groove, and both ends of the tension spring are respectively fixedly connected to the inner wall of the limit groove and the fixing block; a rotating handle is fixedly connected to the outer side of the top of the threaded rod.

[0023] Through the above technical scheme, the fixing component of the present application can fix the dry-type transformer as a whole, and at the same time, the heat generated by it can be conducted to the fixing component for auxiliary heat dissipation. At the same time, part of the heat can be conducted to the ground for auxiliary heat dissipation, and when the transformer body explodes, it can be prevented from being displaced and causing damage to property or personnel.

[0024] Preferably, the shape of the bottom of the push rod is matched with the shape of the limiting rod, the bottom of the threaded rod is fixedly connected with a drill bit, and the lower surface of the mounting base is fixedly connected with a universal wheel.

[0025] Through the above technical solution, the present application can more easily insert the threaded rod into the ground, and at the same time can ensure that the dry-type transformer is more convenient to move.

[0026] Preferably, the movable sealing plate includes an upper fixed plate, a rotating rod and a lower movable plate, the middle part of the upper fixed plate is movably connected to the rotating rod through a bearing, the outer side of the lower half of the rotating rod is fixedly connected to the lower movable plate, the side of the upper fixed plate away from the rotating rod is fixedly connected to the inner wall of the first heat dissipation hole, and the side of the lower movable plate away from the rotating rod is in contact with the inner wall of the first heat dissipation hole.

[0027] Through the above technical solution, when the movable sealing plate of the present application is not in use, the upper fixed plate and the lower movable plate fill each other to form a closed plate to prevent dust from entering the interior. When in use, the gap between the upper fixed plate and the lower movable plate is opened to allow heat to be discharged.

[0028] By adopting the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The explosion-proof dry-type transformer for mining has a good heat dissipation effect, and can efficiently dissipate heat through the first heat dissipation hole and the second heat dissipation hole, ensuring a good use environment for the internal transformer body when working. When the internal transformer body explodes due to a short circuit or a fault, the flame generated can be extinguished while ensuring a good explosion-proof effect to prevent secondary damage, thereby solving the problems raised in the background technology.

[0030] 2. The mine flameproof dry-type transformer can fix the transformer through the design of the fixed component, on the one hand, to ensure the stability during use, and prevent the impact of the explosion from causing damage due to displacement; on the other hand, the heat generated by the internal transformer body can be transferred to the ground, and auxiliary heat dissipation can be performed through the fixed component body.

[0031] 3. The first heat dissipation hole and the second heat dissipation hole of the mine flameproof dry-type transformer can perform good heat dissipation when the transformer is working, and can be closed when the transformer body is not working to prevent powder generated in the mine from entering the transformer body and causing impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a front view of the structure of the present invention;

[0033] Figure 2 The structure of the present invention Figure 1 Enlarged view of point A in the middle;

[0034] Figure 3 The structure of the present invention Figure 1 Enlarged view of point B in the middle;

[0035] Figure 4 The structure of the present invention Figure 1 Enlarged view of point C in the middle;

[0036] Figure 5 This is an enlarged view of the movable sealing plate of the structure of the present invention;

[0037] Figure 6 This is a top view of the movable sealing plate of the structure of the present invention.

[0038] In the figure: 1 bottom plate, 2 mounting base, 3 flameproof housing, 4 transformer body, 5 first heat dissipation hole, 6 movable sealing plate, 61 upper fixed plate, 62 rotating rod, 63 lower movable plate, 7 cooling fan, 8 explosion-proof mechanism, 81 air bag, 82 dry powder, 83 slide rail, 84 slider, 85 support plate, 86 spike cone, 87 fuse rope, 9 second heat dissipation hole, 10 movable cavity, 11 partition, 12 deformation spring, 13 through hole, a fixing component, a1 threaded rod, a2 push rod, a3 limit rod, a4 limit groove, a5 fixing block, a6 tension spring, a7 rotating handle, 14 universal wheel, 15 drill bit. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-6 The present invention provides a technical solution: a flameproof dry-type transformer for mining, comprising a bottom plate 1, a mounting base 2 is fixedly connected to the upper surface of the bottom plate 1, a transformer body 4 is fixedly mounted on the upper surface of the mounting base 2, a flameproof housing 3 is fixedly connected to the upper surface of the mounting base 2 and located outside the transformer body 4, a first heat dissipation hole 5 is opened on the top of the flameproof housing 3, a movable sealing plate 6 is arranged in the first heat dissipation hole 5, a heat dissipation fan 7 is also fixedly mounted in the first heat dissipation hole 5, and an explosion-proof mechanism 8 is arranged in the flameproof housing 3;

[0041] The explosion-proof mechanism 8 comprises:

[0042] An airbag 81, the airbag 81 is bonded to the inner top wall of the flameproof housing 3;

[0043] Dry powder 82, the dry powder 82 is arranged in the air bag 81;

[0044] Slide rails 83, which are fixedly connected to the left and right sides of the inner wall of the flameproof housing 3;

[0045] A slider 84, the slider 84 is slidably connected in the slide rail 83;

[0046] A support plate 85, the support plate 85 is disposed below the airbag 81, and both ends of the support plate 85 are fixedly connected to the corresponding sliders 84;

[0047] A thorn cone 86, the thorn cone 86 is fixedly connected to the upper surface of the support plate 85;

[0048] A fuse rope 87, two ends of which are fixedly connected to the lower surface of the slider 84 and the lower surface of the support plate 85 respectively;

[0049] The outer side of the explosion-proof mechanism 8 is provided with a second heat dissipation hole 9;

[0050] A fixing assembly a is arranged on the upper surface of the mounting base 2 and outside the flameproof enclosure 3 .

[0051] Through the above technical scheme, the present application can ensure that the transformer body 4 has a good heat dissipation effect when working, and ensure that its working temperature is kept within the control range. At the same time, when the transformer body 4 explodes or breaks the circuit and generates flames, it can ensure the explosion-proof effect and extinguish the generated flames, thereby ensuring its safety in use.

[0052] A hole matching the first heat dissipation hole 5 is opened in the middle of the airbag 81 , and the shape of the support plate 85 is consistent with the shape of the airbag 81 . The material of the support plate 85 is ceramic fiber material.

[0053] Through the above technical scheme, the shapes of the airbag 81 and the support plate 85 of the present application are adapted to the first heat dissipation hole 5, ensuring the normal heat dissipation effect of the first heat dissipation hole 5, so that the hot air passes through the hole between the airbag 81 and the support plate 85 and then is discharged through the first heat dissipation hole 5, and the support plate 85 is made of lightweight and heat-resistant material. When the transformer body 4 explodes, the impact generated rushes to the support plate 85 to make it move upward to break the fuse rope 87 and puncture the airbag 81, so that the internal dry powder 82 is sprayed toward the transformer body 4 to extinguish the fire. When the transformer body 4 short-circuit or malfunctions without explosion and generates open flames, the internal temperature and air pressure rise sharply, so that the support plate 85 moves upward, and the high temperature is generated to melt the fuse rope 87 so that the spike cone 86 on the support plate 85 punctures the airbag 81 to extinguish the fire.

[0054] An active cavity 10 is also provided in the flameproof housing 3, and the active cavity 10 is communicated with the second heat dissipation hole 9, a partition 11 is movably connected in the active cavity 10, a deformation spring 12 is also provided in the active cavity 10, and two ends of the deformation spring 12 are respectively fixedly connected to the inner top wall of the active cavity 10 and the top of the partition 11, and a through hole 13 is provided on the partition 11.

[0055] Through the above technical solution, the partition 11 of the present application blocks the second heat dissipation hole 9 when the transformer body 4 is not in use to prevent external dust from entering the interior and causing an impact. The temperature generated when the transformer body 4 is in use causes the deformable spring 12 to shrink and deform due to the heat, driving the partition 11 to move upward, and the through hole 13 is connected to the second heat dissipation hole 9 for heat dissipation, thereby ensuring a good heat dissipation effect.

[0056] The partition 11 is made of a heat-conducting material, the deformation spring 12 is made of a Nitinol alloy, and the diameter of the through hole 13 is consistent with the diameter of the second heat dissipation hole 9 .

[0057] The fixing assembly a comprises a threaded rod a1, a push rod a2, a limiting rod a3, a limiting groove a4, a fixing block a5, a tension spring a6 and a rotating handle a7. The threaded rod a1 is threadedly connected on the mounting base 2 and located on the outer side of the flameproof housing 3. The push rod a2 is inserted in the threaded rod a1. The limiting rod a3 is inserted in the outer side of the lower half of the threaded rod a1, and the side of the limiting rod a3 close to the push rod a2 extends into the threaded rod a1. A limiting groove a4 is provided on the outer side of the threaded rod a1. A fixing block a5 is slidably connected in the limiting groove a4, and the fixing block a5 is fixedly connected to the limiting rod a3. A tension spring a6 is also arranged in the limiting groove a4. The two ends of the tension spring a6 are respectively fixedly connected to the inner wall of the limiting groove a4 and the fixing block a5. The rotating handle a7 is fixedly connected to the outer side of the top of the threaded rod a1.

[0058] Through the above technical scheme, the fixing component a of the present application can fix the dry-type transformer as a whole, and at the same time, the heat generated by it can be conducted to the fixing component a for auxiliary heat dissipation. At the same time, part of the heat can be conducted to the ground for auxiliary heat dissipation, and when the transformer body 4 explodes, it can be prevented from being displaced to cause damage to property or personnel.

[0059] The shape of the bottom of the top rod a2 matches the shape of the limiting rod a3 , a drill bit 15 is fixedly connected to the bottom of the threaded rod a1 , and a universal wheel 14 is fixedly connected to the lower surface of the mounting base 2 .

[0060] Through the above technical solution, the present application can more easily insert the threaded rod a1 into the ground, and at the same time can ensure that the dry-type transformer is more convenient to move.

[0061] The movable sealing plate 6 includes an upper fixed plate 61, a rotating rod 62 and a lower movable plate 63. The middle part of the upper fixed plate 61 is movably connected to the rotating rod 62 through a bearing, and the outer side of the lower half of the rotating rod 62 is fixedly connected to the lower movable plate 63. The side of the upper fixed plate 61 away from the rotating rod 62 is fixedly connected to the inner wall of the first heat dissipation hole 5, and the side of the lower movable plate 63 away from the rotating rod 62 is in contact with the inner wall of the first heat dissipation hole 5.

[0062] Through the above technical solution, when the movable sealing plate 6 of the present application is not in use, the upper fixed plate 61 and the lower movable plate 63 fill each other to form a closed plate to prevent dust from entering the interior. When in use, the gap between the upper fixed plate 61 and the lower movable plate 63 is opened to allow heat to be discharged.

[0063] When the explosion-proof dry-type transformer for mining is working, the dry-type transformer body is moved to the installation site, the rotating handle a4 is turned to insert the threaded rod a1 and the drill bit 15 into the ground, and then the top rod a2 is hammered downward to squeeze the limit rod a3 to move outward to limit the threaded rod a1, that is, the dry-type transformer is limited to prevent displacement. The movable sealing plate 6 is opened to discharge heat through the first heat dissipation hole 5. When the transformer body 4 is working, the heat generated is transferred to the deformation spring 12 through the partition 11 and the explosion-proof shell 3. The deformation spring 12 shrinks and deforms due to heat, driving the partition 11 to move upward. At this time, the through hole 13 and the second heat dissipation hole 9 are connected to dissipate heat. If the transformer body 4 explodes or a flame is generated due to a short circuit or a fault, the impact and heat generated drive the support plate 85 to move upward. At the same time, the fuse rope 87 will melt due to heat or break due to impact. The spike 86 on the support plate 85 punctures the airbag 81, and the internal dry powder 82 is sprayed onto the transformer body 4 to extinguish, ensuring that the dry-type transformer has good safety and is suitable for promotion.

[0064] 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.

[0065] 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. A flameproof dry-type transformer for use in mining, comprising a base plate (1), a mounting base (2) being fixedly connected to the upper surface of the base plate (1), a transformer body (4) being fixedly mounted to the upper surface of the mounting base (2), and a flameproof housing (3) being fixedly connected to the upper surface of the mounting base (2) and located outside the transformer body (4), characterized in that: A first heat dissipation hole (5) is provided on the top of the flameproof housing (3), a movable sealing plate (6) is provided in the first heat dissipation hole (5), a heat dissipation fan (7) is also fixedly installed in the first heat dissipation hole (5), and an explosion-proof mechanism (8) is provided in the flameproof housing (3); The explosion-proof mechanism (8) comprises: An airbag (81), the airbag (81) being bonded to the inner top wall of the flameproof housing (3); Dry powder (82), the dry powder (82) being arranged in the air bag (81); Slide rails (83), the slide rails (83) being fixedly connected to left and right sides of the inner wall of the flameproof enclosure (3); A slider (84), wherein the slider (84) is slidably connected in the slide rail (83); A support plate (85), the support plate (85) being arranged below the airbag (81), and two ends of the support plate (85) being fixedly connected to corresponding sliders (84); A thorn cone (86), wherein the thorn cone (86) is fixedly connected to the upper surface of the support plate (85); a fuse rope (87), wherein two ends of the fuse rope (87) are respectively fixedly connected to the lower surface of the slider (84) and the lower surface of the support plate (85); The outer sides of the explosion-proof mechanisms (8) are each provided with second heat dissipation holes (9); A fixing component (a) is provided on the upper surface of the mounting base (2) and located outside the flameproof enclosure (3); A movable cavity (10) is also provided in the flameproof housing (3), and the movable cavity (10) is in communication with the second heat dissipation hole (9), a partition (11) is movably connected in the movable cavity (10), a deformation spring (12) is also provided in the movable cavity (10), and two ends of the deformation spring (12) are respectively fixedly connected to the inner top wall of the movable cavity (10) and the top of the partition (11), and a through hole (13) is provided on the partition (11); The partition (11) is made of a heat-conducting material, the deformation spring (12) is made of a Nitinol alloy, and the diameter of the through hole (13) is consistent with the diameter of the second heat dissipation hole (9); The fixing assembly (a) comprises a threaded rod (a1), a push rod (a2), a limiting rod (a3), a limiting groove (a4), a fixing block (a5), a tension spring (a6) and a rotating handle (a7); the threaded rod (a1) is threadedly connected to the mounting base (2) and is located on the outer side of the flameproof housing (3); the push rod (a2) is inserted into the threaded rod (a1); the limiting rod (a3) ​​is inserted into the outer side of the lower half of the threaded rod (a1); and the limiting rod (a3) ​​is close to the side of the push rod (a2). The threaded rod (a1) is extended into the threaded rod (a1), and a limiting groove (a4) is provided on the outer side of the threaded rod (a1), a fixing block (a5) is slidably connected in the limiting groove (a4), and the fixing block (a5) is fixedly connected to the limiting rod (a3), and a tension spring (a6) is also provided in the limiting groove (a4), and the two ends of the tension spring (a6) are respectively fixedly connected to the inner wall of the limiting groove (a4) and the fixing block (a5), and a rotating handle (a7) is fixedly connected to the outer side of the top of the threaded rod (a1); The movable sealing plate (6) comprises an upper fixed plate (61), a rotating rod (62) and a lower movable plate (63); the middle portion of the upper fixed plate (61) is movably connected to the rotating rod (62) via a bearing; the outer side of the lower half of the rotating rod (62) is fixedly connected to the lower movable plate (63); a side of the upper fixed plate (61) away from the rotating rod (62) is fixedly connected to the inner wall of the first heat dissipation hole (5); and a side of the lower movable plate (63) away from the rotating rod (62) is in contact with the inner wall of the first heat dissipation hole (5).

2. A mine flameproof dry-type transformer according to claim 1, characterized in that: A hole matching the first heat dissipation hole (5) is provided in the middle of the airbag (81), and the shape of the support plate (85) is consistent with the shape of the airbag (81). The material of the support plate (85) is ceramic fiber material.

3. A mine flameproof dry-type transformer according to claim 1, characterized in that: The shape of the bottom of the push rod (a2) matches the shape of the limit rod (a3); the bottom of the threaded rod (a1) is fixedly connected to a drill bit (15); and the lower surface of the mounting base (2) is fixedly connected to a universal wheel (14).

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