A vacuum casting tank for dry-type transformer casting

Abstract

The present invention relates to the technical field of transformer casting tanks, and specifically discloses a vacuum casting tank for dry transformer casting, including a tank body. Symmetrically and fixedly connected to the outer surfaces on both sides of the tank body are mounting frames. A vacuum gauge is fixedly installed on the side surface of the tank body. The outer surface of the tank body near one side of the vacuum gauge is fixedly connected through a vacuum tube, and the vacuum tube is arranged inside the mounting frame. When the inside of the tank body is in a vacuum state, the inside of the tank body is in a negative pressure state. At this time, under the suction force of the negative pressure, the inner wall of the tank body will be subjected to corresponding extrusion forces. By fixedly installing a bottom plate and a top plate on the upper and lower surfaces inside the tank body, it can be realized that when the inside of the tank body is in a negative pressure state, the two side surfaces of the tank body are supported by the bottom plate and the top plate, greatly reducing the possibility of the tank body deforming, helping to protect the vacuum state inside the tank body, and avoiding the occurrence of air leakage caused by the deformation and damage of the tank body due to being in a negative pressure state for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer casting tanks, and more specifically, to a vacuum casting tank for dry-type transformer casting. Background Art

[0002] In the production process of transformers, the casting of dry-type transformers is one of the key process steps, which has a direct impact on the final performance and reliability of the transformers. In the traditional transformer casting process, a vacuum casting tank is used to complete the casting of materials such as resin in an environment without bubbles and impurities, thereby ensuring the insulation performance and mechanical strength of the transformers. However, existing vacuum casting tanks have some technical challenges and limitations in practical applications, and these problems may affect the stability of the casting process and the final quality of the transformers:

[0003] Problem of tank body deformation: In a vacuum environment, the inner wall of the tank body will be subjected to the extrusion force of the external atmospheric pressure. If the support structure of the tank body is not reasonably designed, it may cause the tank body to deform, affecting the casting accuracy and the service life of the tank body.

[0004] Insufficient sealing performance: During the vacuum casting process, the sealing performance of the tank body is crucial. If the sealing mechanism is not properly designed, it may cause air leakage, unable to reach the ideal vacuum degree, affecting the curing process of the casting material and the quality of the final product.

[0005] Operational complexity: Some existing vacuum casting tanks are complex to operate and require multiple steps and manual adjustments to achieve a vacuum environment. This not only increases the operation difficulty but also may lead to operation errors, affecting the production efficiency. Summary of the Invention

[0006] The present invention provides a vacuum casting tank for dry-type transformer casting, which solves the problems mentioned in the above background art.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A vacuum casting tank for dry-type transformer casting, including a tank body, a casting port is fixedly installed at the top of the tank body, mounting frames are symmetrically and fixedly connected to the outer surfaces on both sides of the tank body, a vacuum gauge is fixedly installed on the side surface of the tank body, a vacuum tube penetrates and is fixedly connected to the outer surface of the tank body near the vacuum gauge side, and the vacuum tube is arranged inside the mounting frame. The vacuum casting tank further includes:

[0008] A support mechanism, which is fixedly installed inside the tank body, and the support mechanism is also arranged directly below the casting port. The support mechanism is used to support the inner wall of the tank body;

[0009] A sealing mechanism, which is fixedly installed in the vacuum tube. The sealing mechanism is used to seal when evacuating the inside of the tank body;

[0010] The supporting mechanism includes a top plate which is arranged in an arc shape. The outer surface of the top plate is fixedly and fittingly connected to the inner upper surface of the tank body. A matching groove is formed through the outer surface of the top plate and is arranged directly below the pouring port. A bottom plate is arranged below the top plate, and the bottom plate is also arranged in an arc shape. The lower surface of the bottom plate is fixedly and fittingly connected to the inner lower surface of the tank body. The bottom plate and the top plate are of the same size and are symmetrically arranged in the tank body. When it is necessary to pour dry-type transformer parts, the parts to be poured can be placed into the tank body through the pouring port. After the parts are placed into the tank body, the pouring port is sealed. At this time, the inside of the tank body is evacuated to a vacuum state through a vacuum tube, and then the parts are poured through the pouring port.

[0011] Preferably, a stabilizing plate is arranged above the bottom plate. The stabilizing plate is arranged in a semi-circular ring shape, and two stabilizing plates are symmetrically arranged in the tank body. Both ends of the stabilizing plate are symmetrically penetrated and fixedly connected with mounting rods, and the mounting rods fixedly connect the two stabilizing plates. Both ends of the mounting rods are respectively fixedly connected to the inner surfaces of the tank body far away from the bottom plate and the top plate.

[0012] Preferably, auxiliary plates are arranged between the stabilizing plates. The auxiliary plates are arranged in an arc shape, and two groups of auxiliary plates are symmetrically arranged in the tank body. Three auxiliary plates are set as a group. The radian of the auxiliary plates is set to be the same as that of the stabilizing plates. One end of the auxiliary plate is fixedly sleeved on the outer surface of the middle part of the mounting rod, and the other end of the auxiliary plate is penetrated and fixedly connected with a limiting rod. Both ends of the limiting rod are respectively penetrated and fixedly connected to the outer surfaces of the two stabilizing plates.

[0013] Preferably, a pouring frame is fixedly connected to one end of the auxiliary plate close to the mounting rod. The cross-section of the pouring frame is arranged in a nearly U shape. A connecting plate is arranged below the pouring frame. The connecting plate is arranged in a disc shape, and there are two connecting plates. The two connecting plates are symmetrically and fixedly connected to the inner surfaces of the bottoms of the two stabilizing plates. A corrugated bladder is fixedly installed between the two connecting plates.

[0014] Preferably, mounting plates are symmetrically and fixedly connected to the bottom surface of the stabilizing plate. The mounting plates are arranged in a strip shape. First telescopic rods are fixedly installed on the outer surfaces of the mounting plates. Five first telescopic rods are set as a group, and there are two groups of first telescopic rods symmetrically arranged. The ends of the two groups of first telescopic rods far away from the mounting plates are symmetrically and fixedly connected to both sides of the upper surface of the bottom plate. The inner cavity of the first telescopic rod is communicated with the corrugated bladder.

[0015] Preferably, a support plate is fixedly connected to the outer surface of one end of the auxiliary plate close to the mounting rod. Two support plates are symmetrically arranged inside the tank body. The support plates are arc-shaped. The top of the support plates is arranged inside the top plate. A second telescopic rod is fixedly connected to the outer surface of the top of the support plates. Three second telescopic rods are arranged in a group. Two groups of second telescopic rods are symmetrically arranged inside the tank body. The end of the second telescopic rod far away from the support plate is fixedly connected to the inner surface of the top plate. The inner cavity of the second telescopic rod is communicated with the corrugated bladder. When the inside of the tank body is in a vacuum negative pressure state, an extrusion force will be generated on the corrugated bladder inside the tank body, and the greater the vacuum pressure, the greater the extrusion force on the corrugated bladder. When the corrugated bladder is squeezed, it will contract, thereby increasing the air pressure inside it, and then the air pressure inside it will be transported into the first telescopic rod and the second telescopic rod, so that the first telescopic rod and the second telescopic rod start to expand outwards, respectively generating an outward driving force on the bottom plate and the top plate, and then firmly squeezing the bottom plate and the top plate against the inner surface of the tank body through the driving force, thus completing the extrusion fixation of the tank body. By setting the bottom plate and the top plate to have the same inner wall curvature as the tank body, the outer surfaces of the bottom plate and the top plate are firmly attached to the inner surface of the tank body, and the possibility of the tank body deforming can be greatly reduced during the expansion process of the tank body.

[0016] Preferably, the sealing mechanism includes a positioning ring. The side surface of the positioning ring is fixedly connected to the inner surface of the vacuum tube. An extrusion rod is slidably connected to the outer surface of the positioning ring through a spring. Six extrusion rods are fixedly arranged at fixed intervals around the central axis of the positioning ring. The end of the extrusion rod far away from the positioning ring is fixedly connected to a telescopic disc.

[0017] Preferably, an air extraction pipe is fixedly connected through the middle of the telescopic disc. A driving ring is fixedly connected to the inner surface of the telescopic disc. A plugging ring is slidably inserted into one end of the driving ring far away from the telescopic disc. The outer surface of the plugging ring is fixedly connected to the inner surface of the positioning ring. A pressure ring is fixedly connected to the inside of the plugging ring. A rubber ring is fixedly connected to one side surface of the pressure ring close to the driving ring. The rubber ring and the driving ring are arranged on the same central axis.

[0018] Preferably, the cross-section of the rubber ring is rectangular, the inside of the rubber ring is hollow, two folding rings are symmetrically fixedly connected to the inside of the rubber ring, the cross-section of the folding ring is triangular, and a reinforcing ring is fixedly connected to the inner surface of the folding ring. The cross-section of the reinforcing ring is circular. When the tank body is gradually evacuated to a vacuum through the air extraction pipe on the vacuum tube, under the action of negative pressure, the telescopic disc will gradually approach the positioning ring, that is, the driving ring will move into the plugging ring, and finally the outer surface of the driving ring will come into contact with the rubber ring. And as the moving distance of the driving ring increases, the extrusion force between the driving ring and the rubber ring gradually increases.

[0019] The present invention provides a vacuum casting tank for dry-type transformer casting. It has the following beneficial effects:

[0020] 1. For the vacuum casting tank of the dry-type transformer, when the inside of the tank is in a vacuum state, the inside of the tank is in a negative pressure state. At this time, under the suction force of the negative pressure, the inner wall of the tank will be subjected to corresponding extrusion forces. By fixedly installing a bottom plate and a top plate on the upper and lower surfaces inside the tank, it can be realized that when the inside of the tank is in a negative pressure state, the two side surfaces of the tank are supported by the bottom plate and the top plate, greatly reducing the possibility of the tank deforming, helping to protect the vacuum state inside the tank, and avoiding the occurrence of air leakage caused by the deformation and damage of the tank due to being in a negative pressure state for a long time.

[0021] 2. For the vacuum casting tank of the dry-type transformer, through the cooperation of the corrugated bladder and the telescopic rod, elastic support for the inner wall of the tank is achieved. The elastic support can evenly distribute the forces received by the inner wall of the tank, reduce stress concentration points, thereby reducing the risk of the tank generating cracks and fractures. At the same time, the elastic support helps to maintain the original shape and size of the tank, ensuring its normal operation, avoiding greater damage to the tank under high negative pressure due to direct rigid support forces, and the tank will generate noise and vibration due to changes in external pressure under negative pressure. The elastic support can absorb and reduce these vibrations, lowering the noise level, and the tank will experience temperature changes during pouring during operation. The elastic support can adapt to this thermal expansion and contraction, preventing damage to the tank caused by additional stresses due to temperature changes.

[0022] 3. For the vacuum casting tank of the dry-type transformer, the sealing effect is automatically enhanced through the negative pressure state of the vacuum tank. And when the driving ring squeezes the rubber ring, it will also squeeze the folded ring inside the rubber ring, causing the folded ring to start to shrink, thereby continuously compressing the thickness of the rubber ring, and then greatly enhancing the contact area between the driving ring and the rubber ring, further improving the sealing effect. Moreover, the folded ring itself has a certain elastic force, so it will generate a reverse extrusion force on the driving ring, making the fit between the driving ring and the rubber ring closer, improving the sealing effect once again. At the same time, by setting a reinforcing ring on the inner surface of the folding plate, the bending amplitude of the folding plate can be inhibited through the reinforcing ring, thereby protecting the folding plate, avoiding excessive deformation of the folding plate resulting in a decline in the supporting ability and affecting the sealing effect. At the same time, since negative pressure sealing does not require additional mechanical components, the need for maintenance and repair is reduced, the maintenance cost is lowered, and there is no complex sealing system, reducing the risk of wear and failure, improving the durability of the entire vacuum tank. In addition, the state of the negative pressure sealing system is usually relatively easy to monitor, and they are directly related to the pressure inside the tank, facilitating the timely discovery and handling of problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view of the present invention;

[0024] Figure 2 It is a schematic diagram of the positions of the support mechanism and the sealing mechanism of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the support mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the partial structure disassembly of the support mechanism of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the corrugated bladder of the present invention;

[0028] Figure 6 It is a schematic diagram of the external structure of the sealing mechanism of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the sealing mechanism of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the rubber ring of the present invention;

[0031] Figure 9 It is the present invention Figure 8 A partial enlarged view of A in.

[0032] In the figure: 1, tank body; 2, pouring port; 3, mounting rack; 4, vacuum gauge; 5, vacuum tube; 6, support mechanism; 61, top plate; 62, mating groove; 63, bottom plate; 64, stabilizing plate; 65, mounting rod; 66, auxiliary plate; 67, limiting rod; 68, pouring frame; 69, connecting plate; 610, corrugated bladder; 611, mounting plate; 612, first telescopic rod; 613, support plate; 614, second telescopic rod; 7, sealing mechanism; 71, positioning ring; 72, extrusion rod; 73, telescopic disc; 74, extraction tube; 75, driving ring; 76, plug-in ring; 77, pressure ring; 78, rubber ring; 79, folding ring; 710, reinforcing ring. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] The first embodiment: As Figures 1 to 9As shown in the figure, the present invention provides a technical solution: a vacuum casting tank for dry-type transformer casting, which includes a tank body 1. A casting port 2 is fixedly installed at the top of the tank body 1. Mounting frames 3 are symmetrically and fixedly connected to the outer surfaces on both sides of the tank body 1. A vacuum gauge 4 is fixedly installed on the side surface of the tank body 1. A vacuum tube 5 is fixedly connected through the outer surface of the tank body 1 on the side close to the vacuum gauge 4. The vacuum tube 5 is arranged inside the mounting frame 3. It further includes:

[0035] A support mechanism 6, which is fixedly installed inside the tank body 1. The support mechanism 6 is also arranged directly below the casting port 2. The support mechanism 6 is used to support the inner wall of the tank body 1;

[0036] A sealing mechanism 7, which is fixedly installed in the vacuum tube 5. The sealing mechanism 7 is used to seal when evacuating the inside of the tank body 1;

[0037] Among them, the support mechanism 6 includes a top plate 61. The top plate 61 is arc-shaped. The outer surface of the top plate 61 is fixedly attached to the inner upper surface of the tank body 1. A mating groove 62 is formed through the outer surface of the top plate 61. The mating groove 62 is arranged directly below the casting port 2. A bottom plate 63 is arranged below the top plate 61. The bottom plate 63 is also arc-shaped. The lower surface of the bottom plate 63 is fixedly attached to the inner lower surface of the tank body 1. The bottom plate 63 and the top plate 61 are of the same size. The bottom plate 63 and the top plate 61 are symmetrically arranged inside the tank body 1.

[0038] During operation, when casting dry-type transformer parts, the parts to be cast can be placed into the tank body 1 through the casting port 2. After the parts are placed into the tank body 1, the casting port 2 is sealed. At this time, the inside of the tank body 1 is evacuated to a vacuum state through the vacuum tube 5, and then the parts are cast through the casting port 2. When the inside of the tank body 1 is in a vacuum state, the inside of the tank body 1 is in a negative pressure state. At this time, under the suction force of the negative pressure, the inner wall of the tank body 1 will be subjected to corresponding extrusion forces. By fixedly installing the bottom plate 63 and the top plate 61 on the inner upper and lower surfaces of the tank body 1, it can be realized that when the inside of the tank body 1 is in a negative pressure state, the two side surfaces of the tank body 1 are supported by the bottom plate 63 and the top plate 61, greatly reducing the possibility of deformation of the tank body 1, helping to protect the vacuum state inside the tank body 1, and avoiding the occurrence of air leakage caused by deformation and damage of the tank body 1 due to long-term negative pressure.

[0039] Second embodiment: As Figures 1 to 9 shown, a stabilizing plate 64 is arranged above the bottom plate 63. The stabilizing plate 64 is semi-circular ring-shaped. Two stabilizing plates 64 are symmetrically arranged inside the tank body 1. Installation rods 65 are symmetrically and fixedly connected through both ends of the stabilizing plate 64. The installation rods 65 fixedly connect the two stabilizing plates 64. The two ends of the installation rods 65 are respectively fixedly connected to the inner surfaces of the tank body 1 away from the bottom plate 63 and the top plate 61.

[0040] An auxiliary plate 66 is arranged between the stabilizing plates 64. The auxiliary plate 66 is arranged in an arc shape. Two groups of auxiliary plates 66 are symmetrically arranged in the tank body 1. Three auxiliary plates 66 are set as a group. The radian of the auxiliary plate 66 is set to be the same as that of the stabilizing plate 64. One end of the auxiliary plate 66 is fixedly sleeved on the outer surface of the middle part of the mounting rod 65. The other end of the auxiliary plate 66 penetrates and is fixedly connected with a limiting rod 67. The two ends of the limiting rod 67 respectively penetrate and are fixedly connected on the outer surfaces of the two stabilizing plates 64.

[0041] A casting frame 68 is fixedly connected to one end of the auxiliary plate 66 close to the mounting rod 65. The cross section of the casting frame 68 is set to be nearly U-shaped. A connecting plate 69 is arranged below the casting frame 68. The connecting plate 69 is set to be disc-shaped. There are two connecting plates 69, and the two connecting plates 69 are symmetrically and fixedly connected to the inner surfaces of the bottoms of the two stabilizing plates 64. A corrugated bladder 610 is fixedly installed between the two connecting plates 69.

[0042] Mounting plates 611 are symmetrically and fixedly connected to the bottom surface of the stabilizing plate 64. The mounting plates 611 are set to be strip-shaped. A first telescopic rod 612 is fixedly installed on the outer surface of the mounting plate 611. Five first telescopic rods 612 are set as a group. Two groups of first telescopic rods 612 are symmetrically arranged. The ends of the two groups of first telescopic rods 612 far from the mounting plate 611 are symmetrically and fixedly connected to both sides of the upper surface of the bottom plate 63. The inner cavity of the first telescopic rod 612 is communicated with the corrugated bladder 610.

[0043] Support plates 613 are fixedly connected to the outer surface of one end of the auxiliary plate 66 close to the mounting rod 65. Two support plates 613 are symmetrically arranged in the tank body 1. The support plates 613 are arranged in an arc shape. The tops of the support plates 613 are arranged inside the top plate 61. A second telescopic rod 614 is fixedly connected to the outer surface of the top of the support plate 613. Three second telescopic rods 614 are set as a group. Two groups of second telescopic rods 614 are symmetrically arranged in the tank body 1. The ends of the second telescopic rods 614 far from the support plate 613 are fixedly connected to the inner surface of the top plate 61. The inner cavity of the second telescopic rod 614 is communicated with the corrugated bladder 610.

[0044] During operation, when the inside of the tank body 1 is in a vacuum negative pressure state, an extrusion force will be generated on the corrugated bladder 610 inside the tank body 1, and the greater the vacuum pressure, the greater the extrusion force on the corrugated bladder 610. When the corrugated bladder 610 is squeezed, it will contract, thereby increasing the air pressure inside it. Then, the air pressure inside it will be transported into the first telescopic rod 612 and the second telescopic rod 614, so that the first telescopic rod 612 and the second telescopic rod 614 start to expand outward, respectively generating an outward driving force on the bottom plate 63 and the top plate 61. Then, through the driving force, the bottom plate 63 and the top plate 61 are firmly squeezed against the inner surface of the tank body 1, thus completing the extrusion and fixation of the tank body 1. By setting the bottom plate 63 and the top plate 61 to have the same inner wall curvature as the tank body 1, the outer surfaces of the bottom plate 63 and the top plate 61 are firmly attached to the inner surface of the tank body 1. During the expansion process of the tank body 1, the possibility of deformation of the tank body 1 can be greatly reduced. At the same time, through the cooperation of the corrugated bladder 610 and the telescopic rod, elastic support for the inner wall of the tank body 1 is realized. The elastic support can evenly distribute the forces received by the inner wall of the tank body 1, reduce stress concentration points, thereby reducing the risk of cracks and fractures in the tank body 1. At the same time, the elastic support helps to maintain the original shape and size of the tank body 1, ensuring its normal operation, avoiding greater damage to the tank body 1 under high negative pressure due to direct rigid support force, and the tank body 1 will generate noise and vibration due to changes in external pressure under negative pressure. The elastic support can absorb and reduce these vibrations and reduce the noise level. Moreover, during the operation process of the tank body 1, it will experience temperature changes during pouring. The elastic support can adapt to this thermal expansion and contraction, preventing additional stress caused by temperature changes from damaging the tank body 1.

[0045] Third Embodiment: As Figures 1 to 9 shown, the sealing mechanism 7 includes a positioning ring 71. The side surface of the positioning ring 71 is fixedly connected to the inner surface of the vacuum tube 5. Six extrusion rods 72 are slidably connected to the outer surface of the positioning ring 71 through springs at fixed intervals around the central axis of the positioning ring 71. One end of the extrusion rod 72 away from the positioning ring 71 is fixedly connected to a telescopic disc 73.

[0046] A suction pipe 74 is fixedly connected through the middle of the telescopic disc 73. A driving ring 75 is fixedly connected to the inner surface of the telescopic disc 73. A plugging ring 76 is slidably inserted into one end of the driving ring 75 away from the telescopic disc 73. The outer surface of the plugging ring 76 is fixedly connected to the inner surface of the positioning ring 71. A pressure ring 77 is fixedly connected to the inside of the plugging ring 76. A rubber ring 78 is fixedly connected to one side surface of the pressure ring 77 close to the driving ring 75. The rubber ring 78 and the driving ring 75 are arranged on the same central axis.

[0047] The cross-section of the rubber ring 78 is rectangular, and the inside of the rubber ring 78 is hollow. A folded ring 79 is symmetrically and fixedly connected inside the rubber ring 78. The cross-section of the folded ring 79 is triangular, and an enhanced ring 710 is fixedly connected to the inner surface of the folded ring 79. The cross-section of the enhanced ring 710 is circular.

[0048] During operation, when the tank body 1 is gradually evacuated to a vacuum through the air extraction pipe 74 on the vacuum pipe 5, under the action of negative pressure, the telescopic disc 73 will gradually approach the positioning ring 71, that is, the driving ring 75 will move into the plugging ring 76, and finally the driving ring 75 will come into contact with the outer surface of the rubber ring 78. As the moving distance of the driving ring 75 increases, the extrusion force between the driving ring 75 and the rubber ring 78 gradually increases, thereby automatically enhancing the sealing effect through the negative pressure state of the vacuum tank. When the driving ring 75 extrudes the rubber ring 78, it will also extrude the folded ring 79 inside the rubber ring 78, causing the folded ring 79 to start to contract, and then the thickness of the rubber ring 78 is continuously compressed, greatly enhancing the contact area between the driving ring 75 and the rubber ring 78 and further improving the sealing effect. Moreover, the folded ring 79 itself has a certain elastic force, so it will generate a reverse extrusion force on the driving ring 75, making the fit between the driving ring 75 and the rubber ring 78 closer and improving the sealing effect once again. At the same time, by setting the enhanced ring 710 on the inner surface of the folded plate, the bending amplitude of the folded plate can be inhibited through the enhanced ring 710, thereby protecting the folded plate and preventing excessive deformation of the folded plate from reducing the supporting ability and affecting the sealing effect. At the same time, since negative pressure sealing does not require additional mechanical components, the need for maintenance and repair is reduced, the maintenance cost is lowered, and there is no complex sealing system, reducing the risk of wear and failure and improving the durability of the entire vacuum tank. In addition, the state of the negative pressure sealing system is usually relatively easy to monitor, and it is directly related to the pressure inside the tank, facilitating the timely discovery and handling of problems.

[0049] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A vacuum casting tank for dry-type transformer casting, comprising a tank body (1), characterized in that: A pouring port (2) is fixedly installed at the top of the tank body (1). Mounting brackets (3) are symmetrically and fixedly connected to the outer surfaces on both sides of the tank body (1). A vacuum gauge (4) is fixedly installed on the side surface of the tank body (1). A vacuum tube (5) is fixedly connected through the outer surface of the tank body (1) on the side close to the vacuum gauge (4). The vacuum tube (5) is arranged inside the mounting bracket (3). Further included are: A support mechanism (6) fixedly installed inside the tank body (1), simultaneously arranged directly below the pouring port (2), and used for supporting the inner wall of the tank body (1); A sealing mechanism (7) fixedly installed in the vacuum tube (5) and used for sealing when evacuating the tank body (1); Wherein the support mechanism (6) includes a top plate (61) which is arc-shaped. The outer surface of the top plate (61) is fixedly attached to the inner upper surface of the tank body (1). A matching groove (62) is formed through the outer surface of the top plate (61) and is arranged directly below the pouring port (2). A bottom plate (63) is arranged below the top plate (61), and the bottom plate (63) is also arc-shaped. The lower surface of the bottom plate (63) is fixedly attached to the inner lower surface of the tank body (1). The bottom plate (63) and the top plate (61) are of the same size and are symmetrically arranged inside the tank body (1); A stabilizing plate (64) is arranged above the bottom plate (63). Mounting rods (65) are symmetrically and fixedly connected through both ends of the stabilizing plate (64). An auxiliary plate (66) is arranged between the stabilizing plates (64). One end of the auxiliary plate (66) is fixedly sleeved on the outer surface of the middle part of the mounting rod (65). The other end of the auxiliary plate (66) is fixedly connected with a limiting rod (67). A pouring frame (68) is fixedly connected to one end of the auxiliary plate (66) close to the mounting rod (65). A connecting plate (69) is arranged below the pouring frame (68). There are two connecting plates (69). A corrugated bladder (610) is fixedly installed between the two connecting plates (69). Mounting plates (611) are symmetrically and fixedly connected to the bottom surface of the stabilizing plate (64). A first telescopic rod (612) is fixedly installed on the outer surface of the mounting plate (611). The inner cavity of the first telescopic rod (612) is communicated with the corrugated bladder (610). A support plate (613) is fixedly connected to the outer surface of one end of the auxiliary plate (66) close to the mounting rod (65). A second telescopic rod (614) is fixedly connected to the outer surface of the top of the support plate (613). The inner cavity of the second telescopic rod (614) is communicated with the corrugated bladder (610).

2. A vacuum casting tank for dry-type transformer casting according to claim 1, characterized in that: The stabilizing plate (64) is arranged in a semi-circular ring shape, and two stabilizing plates (64) are symmetrically arranged inside the tank body (1). The mounting rod (65) fixedly connects the two stabilizing plates (64), and both ends of the mounting rod (65) are fixedly connected to the inner surfaces of the tank body (1) away from the bottom plate (63) and the top plate (61).

3. A vacuum casting tank for dry-type transformer casting according to claim 2, characterized in that: The auxiliary plate (66) is arranged in an arc shape, and two groups of auxiliary plates (66) are symmetrically arranged inside the tank body (1). Three auxiliary plates (66) are set as a group, and the radian of the auxiliary plate (66) is set to be the same as that of the stabilizing plate (64). Both ends of the limiting rod (67) penetrate and are fixedly connected to the outer surfaces of the two stabilizing plates (64).

4. A vacuum casting tank for dry-type transformer casting according to claim 3, characterized in that: The connecting plate (69) is arranged in a disc shape, and the two connecting plates (69) are symmetrically and fixedly connected to the inner surfaces of the bottoms of the two stabilizing plates (64).

5. A vacuum casting tank for dry-type transformer casting according to claim 4, characterized in that: The mounting plate (611) is arranged in a strip shape, and five first telescopic rods (612) are set as a group. Two groups of first telescopic rods (612) are symmetrically arranged. The ends of the two groups of first telescopic rods (612) away from the mounting plate (611) are symmetrically and fixedly connected to both sides of the upper surface of the bottom plate (63).

6. A vacuum casting tank for dry-type transformer casting according to claim 5, characterized in that: Two supporting plates (613) are symmetrically arranged inside the tank body (1). The supporting plates (613) are arranged in an arc shape, and the tops of the supporting plates (613) are arranged inside the top plate (61). Three second telescopic rods (614) are set as a group, and two groups of second telescopic rods (614) are symmetrically arranged inside the tank body (1). The ends of the second telescopic rods (614) away from the supporting plates (613) are fixedly connected to the inner surface of the top plate (61).

7. A vacuum casting tank for dry-type transformer casting according to claim 6, characterized in that: The sealing mechanism (7) includes a positioning ring (71). The side surface of the positioning ring (71) is fixedly connected to the inner surface of the vacuum tube (5). The outer surface of the positioning ring (71) is slidably connected with a pressing rod (72) through a spring. Six pressing rods (72) are fixedly spaced around the central axis of the positioning ring (71). One end of the pressing rod (72) away from the positioning ring (71) is fixedly connected with a telescopic disc (73).

8. A vacuum casting tank for dry-type transformer casting according to claim 7, characterized in that: A suction pipe (74) penetrates and is fixedly connected to the middle of the telescopic disc (73). A driving ring (75) is fixedly connected to the inner surface of the telescopic disc (73). One end of the driving ring (75) away from the telescopic disc (73) is slidably inserted with an insertion ring (76). The outer surface of the insertion ring (76) is fixedly connected to the inner surface of the positioning ring (71). A pressure ring (77) is fixedly connected to the inside of the insertion ring (76). A rubber ring (78) is fixedly connected to one side surface of the pressure ring (77) close to the driving ring (75). The rubber ring (78) and the driving ring (75) are arranged on the same central axis.

9. A vacuum casting tank for dry-type transformer casting according to claim 8, characterized in that: The cross-section of the rubber ring (78) is rectangular, the interior of the rubber ring (78) is hollow, a folded ring (79) is symmetrically and fixedly connected inside the rubber ring (78), the cross-section of the folded ring (79) is triangular, a reinforcing ring (710) is fixedly connected to the inner surface of the folded ring (79), and the cross-section of the reinforcing ring (710) is circular.

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