Oil injection sealing box for transformer

Abstract

The utility model discloses a transformer oil injection sealing box which comprises a vacuum box, two moving doors, two moving mechanisms, two left push-pull mechanisms and two right push-pull mechanisms, two opposite side walls of the vacuum box are respectively provided with an inlet and an outlet for a transformer to enter and exit, and the two moving doors respectively correspond to the corresponding inlets and outlets. The two moving mechanisms are mounted on the vacuum box; annular sealing faces are arranged on the edges of the two entrances and exits. Annular sealing rings matched with the corresponding movable doors are arranged on the annular sealing faces. The two left push-pull mechanisms are installed on the left side edges of the corresponding entrances and exits respectively, the two right push-pull mechanisms are installed on the right side edges of the corresponding entrances and exits respectively, the left side edge of the movable door is provided with left limiting notches matched with the left push-pull mechanisms in a buckled mode, and the right side edge of the movable door is provided with right limiting notches matched with the right push-pull mechanisms in a buckled mode. According to the transformer oil injection sealing box, the movable door can be comprehensively attached to the entrance, the sealing performance is improved, and the requirement of a high-vacuum oil injection process is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer equipment technical field, especially a kind of transformer oil injection sealing box. BACKGROUND

[0002] The insulation performance core of oil-immersed transformer depends on the purity of insulating oil and the reliability of vacuum oil injection process, and in large-scale production, to realize batch oil injection of multiple different volume specifications transformers, the oil injection sealing box needs to be designed as a large volume structure.

[0003] The core structure of the existing oil injection sealing box includes a vacuum tank, two movable doors and two moving mechanisms: two opposite side walls of the vacuum tank are provided with entrances and exits for transformers, and the two movable doors are movably installed on the corresponding outer side walls of the vacuum tank. The moving mechanism drives the movable door to move along the width direction of the side wall of the vacuum tank, to open and close the entrance and exit.

[0004] However, this structure has key sealing hazards in actual application: due to the large volume design of the oil injection sealing box, the weight of the movable door increases significantly, and the weight of the movable door of a large sealing box can reach hundreds of kilograms. Since the sealing of the movable door only relies on the driving force of the moving mechanism to achieve compression, the heavy door body is prone to mechanical imbalance due to its own gravity - the middle part of the door body will sag due to gravity, resulting in insufficient pressing force of the edge of the door body and the sealing surface of the entrance and exit of the vacuum tank, and the local pressure of the force concentration point of the moving mechanism will be too high. This uneven stress problem of "local compression, local loosening" directly destroys the overall adhesion effect of the sealing surface, making it difficult to ensure the complete sealing state required for vacuum oil injection, thereby affecting the stability of the vacuum degree and the purity of the insulating oil, and ultimately restricting the insulation performance and production efficiency of the transformer. SUMMARY

[0005] The problem to be solved by the utility model is to provide a transformer oil injection sealing box, which can make the movable door and the entrance and exit fully adhere, improve the sealing performance, and meet the requirements of high-vacuum oil injection process.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a transformer oil injection sealing box, including vacuum tank, two movable doors and two moving mechanism, the two opposite side walls of vacuum tank are equipped with the entrance and exit respectively for the transformer, two movable doors are respectively movable installation in the outside of two opposite outer side walls of vacuum tank and with corresponding entrance and exit correspond, two moving mechanism all are installed on the vacuum tank and can drive corresponding movable door along the width direction of vacuum tank side wall moves, characterized by: still include two left and right sliding mechanism that can draw the movable door or push, the rim of two entrance and exit all is equipped with annular sealing surface, is equipped with annular sealing ring with corresponding movable door on annular sealing surface, two left and right sliding mechanism are respectively installed on the left side of corresponding entrance and exit, two right and left sliding mechanism are respectively installed on the right side of corresponding entrance and exit, the left side of movable door is equipped with the left limit gap of buckle cooperation with left and right sliding mechanism on the rim, the right side of movable door is equipped with the right limit gap of buckle cooperation with right and left sliding mechanism on the rim, the moving mechanism includes servo motor, gear, rack, upper linear guide slot, lower linear guide slot, lower linear guide rail, two rollers, two upper guide columns and two lower guide columns, upper linear guide slot, lower linear guide slot are respectively installed on the outside wall upper edge, lower edge of vacuum tank and parallel to each other, lower linear guide rail is installed on the lower edge of vacuum tank outside wall, and lower linear guide rail is inside lower linear guide slot and parallel to lower linear guide slot, movable door is between upper linear guide slot and lower linear guide slot, the lower edge of movable door is fixed with two wheel shafts perpendicular to the width direction of movable door, the length of wheel shaft is greater than the thickness of roller, two rollers are rotatably installed on the corresponding wheel shaft and can move along the axial direction of corresponding wheel shaft, two rollers are on lower linear guide rail and can move along lower linear guide rail, two lower guide columns are installed on the lower edge of movable door, two lower guide columns are in lower linear guide slot and can move along lower linear guide slot, two upper guide columns are installed on the upper edge of movable door, two upper guide columns are in upper linear guide slot and can move along upper linear guide slot, the inner groove wall of lower linear guide slot is equipped with two lower guide notches corresponding to the corresponding lower guide column, and the lower moving space for the lower guide column is arranged between the lower linear guide slot and the lower linear guide rail, and the lower moving space is communicated with the lower linear guide slot through the two lower guide notches; the inner groove wall of upper linear guide slot is equipped with two upper guide notches corresponding to the corresponding upper guide column, and the upper moving space for the inner and outer movement of the upper guide column is arranged between the upper linear guide slot and the movable door, and the upper moving space is communicated with the upper linear guide slot through the two upper guide notches; servo motor is installed on movable door, gear is installed on the power output shaft of servo motor, rack is installed on the lower edge of vacuum tank outside wall and extends along the length direction of lower linear guide slot, and rack is engaged with gear.

[0008] When the mobile door is in the open position, the left and right push-pull mechanisms are in the extended state; the upper guide columns are in the upper linear guide slots, the lower guide columns are in the lower linear guide slots, and the rollers are on the lower linear guide rails.

[0009] When the mobile door is to be closed, the servo motor is started and drives the gear to rotate, the gear is engaged with the rack fixed outside the vacuum box, the rotary motion is converted into linear driving force, and the mobile door is moved along the horizontal direction to the entrance; during the movement of the mobile door, the upper guide columns slide along the upper linear guide slots, the lower guide columns slide along the lower linear guide slots, and the rollers roll along the lower linear guide rails, all of which cooperate to ensure the straightness of the translation of the mobile door and avoid deviation; when the left and right limit notches of the mobile door are aligned with the output ends of the left and right push-pull mechanisms, the servo motor stops working, and the mobile door is translated to the position (at this time, the mobile door is just aligned with the entrance, but not in contact with the annular sealing ring on the edge of the entrance).

[0010] When the mobile door is translated to the position, the left limit notch of the mobile door is buckled with the output end of the left push-pull mechanism, and the right limit notch of the mobile door is buckled with the output end of the right push-pull mechanism; then the left and right push-pull mechanisms are started, the lower guide columns enter the lower moving space through the lower guide notches of the lower linear guide slots with the initial action of the left and right push-pull mechanisms; the upper guide columns enter the upper moving space through the upper guide notches of the upper linear guide slots (the two upper guide columns and two lower guide columns are switched from "translation guide" to "compression guide", and the mobile door has the freedom to move horizontally (perpendicular to the translation direction) to prepare for the mobile door to fit the annular sealing ring); then, the left and right push-pull mechanisms continue to act, exerting a horizontal pulling force on the left and right edges of the mobile door, so that the inner surface edge of the mobile door is tightly fitted on the edge of the entrance through the annular sealing ring, and the sealing surface of the mobile door and the entrance is fully fitted without local looseness or pressure concentration, so that the vacuum box forms a sealed space.

[0011] In the preferred solution, the left and right push-pull mechanisms each comprise a push-pull seat, a push-pull oil cylinder and two limiting rings. The push-pull seat is installed on the outer sidewall of the vacuum box. The push-pull oil cylinder is installed on the push-pull seat. The piston rod of the push-pull oil cylinder extends towards the direction of the moving door and is perpendicular to the inner surface of the moving door. The two limiting rings are each fixedly installed on the end of the piston rod of the push-pull oil cylinder. The two limiting rings form a limiting clamping groove therebetween. Each limiting clamping groove is in clamping cooperation with the corresponding left limiting notch and right limiting notch. When the moving door is closed, the left limiting notch of the moving door is in clamping cooperation with the limiting clamping groove of the left push-pull mechanism, and the right limiting notch of the moving door is in clamping cooperation with the limiting clamping groove of the right push-pull mechanism. The piston rod of the push-pull oil cylinder is rigidly connected with the moving door. The pulling force is directly applied to the edge of the moving door, thereby providing a prerequisite for the moving door to fully adhere to the sealing surface of the entrance / exit. The moving door is forced to accurately cooperate with the sealing surface of the entrance / exit, ensuring that the moving door is completely aligned with the sealing surface and avoiding sealing misalignment.

[0012] In the further preferred solution, a left limiting block is arranged on the left side edge of the moving door. The left limiting notch is arranged on the left limiting block. The opening of the left limiting notch is arranged towards the right. A right limiting block is arranged on the right side edge of the moving door. The right limiting notch is arranged on the right limiting block. The opening of the right limiting notch is arranged towards the right. The left and right limiting blocks provide rigid support for the edges of the moving door, thereby avoiding deformation of the edges of the moving door due to the opening of the notches.

[0013] In the preferred solution, the transformer oil sealing box further comprises a controller, two door opening in place proximity switches and two door closing in place proximity switches. The two door closing in place proximity switches are each installed on the left sidewall of the corresponding entrance / exit. When the two door closing in place proximity switches are each in corresponding cooperation with the left side edge of the corresponding moving door, the moving door is in a corresponding state with the corresponding entrance / exit. The two door opening in place proximity switches are each installed on the outer groove wall of the corresponding lower straight line guide groove. The two door opening in place proximity switches are each in corresponding cooperation with the right side edge of the corresponding moving door, so that the moving door is in a completely staggered state with the corresponding entrance / exit. The signal output ends of the two door opening in place proximity switches and the two door closing in place proximity switches are each electrically connected with the corresponding signal input end of the controller. The two left push-pull mechanisms, the two right push-pull mechanisms and the servo motor are each electrically connected with the corresponding signal output end of the controller. The door opening in place proximity switches are used to feedback the completely open state of the moving door, thereby preventing overtravel of the moving door. The door closing in place proximity switches are used to feedback the completely closed state of the moving door, thereby preventing the moving door from not being sealed in place.

[0014] When the mobile door is to be closed, the controller sends a door closing instruction to the servo motor, the servo motor starts and drives the gear to rotate, driving the mobile door to move horizontally to the right (i.e. the direction of the entrance and exit), until the door closing in place proximity switch sends a door closing in place signal to the controller, i.e. the mobile door is moved horizontally to the position. After the mobile door is moved horizontally to the position, the controller triggers the left and right push-pull mechanisms to start, and applies a transverse pulling force to the left and right edges of the mobile door, so that the mobile door is fully attached to the sealing surface of the entrance and exit, i.e. the mobile door completely closes the entrance and exit.

[0015] When the mobile door is to be opened, the controller triggers the left and right push-pull mechanisms to start, and applies a transverse pushing force to the left and right edges of the mobile door, so that the mobile door is separated from the sealing surface of the entrance and exit; then the controller sends an opening door instruction to the servo motor, the servo motor starts and drives the gear to rotate, driving the mobile door to move horizontally to the left, until the door opening in place proximity switch sends a door opening in place signal to the controller, the mobile door is moved horizontally to the position and stops moving, i.e. the mobile door is in a completely open state. Through the cooperation of the controller, the door opening in place proximity switch and the door closing in place proximity switch, the actions of the left and right push-pull mechanisms and the servo motor are controlled, realizing the automatic control of the mobile door throughout the process without manual intervention, and shortening the sealing time when the door is closed.

[0016] In a further preferred embodiment, an upper limit stop block is arranged on the left side edge of the mobile door, the upper limit stop block is exposed on the inner side of the inner surface of the mobile door, and the door closing in place proximity switch is correspondingly matched with the upper limit stop block; a lower limit stop block is arranged on the right side edge of the mobile door, the lower limit stop block is exposed on the outer side of the outer surface of the mobile door, and the door opening in place proximity switch is correspondingly matched with the lower limit stop block. The upper limit stop block is exposed on the inner side of the inner surface of the mobile door, so that the door closing in place proximity switch is triggered only when the mobile door is completely moved horizontally to the position, avoiding the misoperation of the pressing action when the mobile door is not aligned; the lower limit stop block is exposed on the outer side of the outer surface, accurately feeding back the state that the mobile door is completely misaligned with the entrance and exit, preventing overtravel.

[0017] In a preferred embodiment, an annular groove with a notch facing outward is arranged on the outer edge of the entrance and exit, the annular sealing ring is arranged in the annular groove, and the outer part of the annular sealing ring is protruded outward on the edge of the entrance and exit. The annular groove provides a stable installation space for the annular sealing ring, preventing the annular sealing ring from falling off or deviating during the pressing and horizontal movement of the mobile door, and ensuring that the sealing surface is always fully covered by the annular sealing ring without any missed sealing area. The outer part of the annular sealing ring is protruded outward on the edge of the entrance and exit, when the mobile door is pressed, the protruding part of the annular sealing ring is first in contact with the inner surface of the mobile door and is uniformly compressed, filling the small gap between the mobile door and the sealing surface.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses adopt annular sealing ring in advance fixed on the annular sealing surface of the entrance and exit edge, through left and right push -pull mechanism cooperation mobile door's limit gap, make left and right push -pull mechanism bidirectionally synchronous and draw the mobile door tightly, and the mobile door transverse compression tightly is overall attached the sealing surface of the entrance and exit edge, improve the leakproofness of vacuum box, avoid the phenomenon of " partial compression, partial loosening " to take place, solved the sealing failure problem of heavy door body because of gravity droop, satisfy high vacuum oil injection process requirement. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model embodiment;

[0021] Figure 2 It is the structure schematic diagram (elevation angle) of mobile door and mobile mechanism in the utility model embodiment;

[0022] Figure 3 It is Figure 2 the rear view of mobile door in

[0023] Figure 4 It is Figure 1 the section view of A-A in DETAILED DESCRIPTION

[0024] The utility model will be specifically described below in connection with the drawings and specific embodiment.

[0025] As Figures 1-4As shown, the transformer oil sealing box in the embodiment comprises a vacuum box 1, two movable doors 2, two moving mechanisms 3, two left push-pull mechanisms 4 capable of pulling or pushing the movable doors 2, and two right push-pull mechanisms 5 capable of pulling or pushing the movable doors 2. The vacuum box 1 is provided with two opposite side walls each of which is provided with an access opening 11 for the transformer. The two movable doors 2 are movably installed on the outer sides of the two opposite side walls of the vacuum box 1 and correspond to the access openings 11. The two moving mechanisms 3 are installed on the vacuum box 1 and capable of driving the corresponding movable doors 2 to move along the width direction of the side walls of the vacuum box 1. The edges of the two access openings 11 are each provided with an annular sealing surface 111, and the annular sealing surface 111 is provided with an annular sealing ring 112 matched with the corresponding movable door 2. The two left push-pull mechanisms 4 are respectively installed on the left side edges of the corresponding access openings 11, and the two right push-pull mechanisms 5 are respectively installed on the right side edges of the corresponding access openings 11. The left side edges of the movable doors 2 are provided with left limiting notches 21 matched with the left push-pull mechanisms 4, and the right side edges of the movable doors 2 are provided with right limiting notches 22 matched with the right push-pull mechanisms 5. The moving mechanism 3 comprises a servo motor 31, a gear (not shown in the figure), a rack (not shown in the figure), an upper straight guide slot 34, a lower straight guide slot 35, a lower straight guide rail 36, two rollers 37, two upper guide columns 38, and two lower guide columns 39. The upper straight guide slot 34 and the lower straight guide slot 35 are respectively installed on the upper edges and lower edges of the outer side walls of the vacuum box 1 and are parallel to each other. The lower straight guide rail 36 is installed on the lower edge of the outer side wall of the vacuum box 1 and is inside the lower straight guide slot 35 and parallel to the lower straight guide slot 35. The movable door 2 is between the upper straight guide slot 34 and the lower straight guide slot 35. The lower edge of the movable door 2 is fixedly provided with two wheel shafts 23 perpendicular to the width direction of the movable door 2. The length of the wheel shaft 23 is greater than the thickness of the roller 37. The two rollers 37 are rotatably installed on the corresponding wheel shafts 23 and can move along the axial direction of the corresponding wheel shafts 23. The two rollers 37 are on the lower straight guide rail 36 and can move along the lower straight guide rail 36. The two lower guide columns 39 are installed on the lower edge of the movable door 2 and can move along the lower straight guide slot 35. The two upper guide columns 38 are installed on the upper edge of the movable door 2 and can move along the upper straight guide slot 34. The inner groove wall of the lower straight guide slot 35 is provided with two lower guide notches 351 corresponding to the corresponding lower guide columns 39. The lower straight guide slot 35 and the lower straight guide rail 36 are provided with a lower moving space 352 for the movement of the lower guide column 39. The lower moving space 352 communicates with the lower straight guide slot 35 through the two lower guide notches 351.The inner groove wall of the upper linear guide groove 34 is provided with two upper guide notches 341 corresponding to the corresponding upper guide columns 38. The upper linear guide groove 34 is provided with an upper moving space 342 for the inner and outer movement of the upper guide columns 38. The upper moving space 342 is communicated with the upper linear guide groove 34 through the two upper guide notches 341. The servo motor 31 is installed on the moving door 2. The gear is installed on the power output shaft of the servo motor 31. The rack is installed on the lower edge of the outer side wall of the vacuum box 1 and extends along the length direction of the lower linear guide groove 35. The rack is engaged with the gear.

[0026] When the moving door 2 is in the open position, the left and right push-pull mechanisms 4 and 5 are in the extended state. The upper guide columns 38 are in the upper linear guide groove 34, the lower guide columns 39 are in the lower linear guide groove 35, and the rollers 37 are on the lower linear guide rail 36.

[0027] When the moving door 2 is to be closed, the servo motor 31 is started and drives the gear to rotate. The gear is engaged with the rack fixed on the outer side of the vacuum box 1, converts the rotary motion into a linear driving force, and drives the moving door 2 to move along the horizontal direction to the entrance 11. During the movement of the moving door 2, the upper guide columns 38 slide along the upper linear guide groove 34, the lower guide columns 39 slide along the lower linear guide groove 35, and the rollers 37 roll along the lower linear guide rail 36. The three cooperate to ensure the straightness of the translation of the moving door 2 and avoid deviation. When the left and right limiting notches of the moving door 2 are aligned with the output ends of the left and right push-pull mechanisms, the servo motor 31 stops acting, and the moving door 2 is translated to the position (at this time, the moving door 2 is just aligned with the entrance 11, but does not contact the annular sealing ring 112 on the edge of the entrance 11).

[0028] After the moving door 2 is translated to the position, the left limiting notch 21 of the moving door 2 is buckled with the output end of the left push-pull mechanism 4, and the right limiting notch 22 of the moving door 2 is buckled with the output end of the right push-pull mechanism 5. Then, the left and right push-pull mechanisms 4 and 5 are started. The lower guide columns 39 enter the lower moving space 352 through the lower guide notches 351 of the lower linear guide groove 35 by the initial action of the left and right push-pull mechanisms 4 and 5. The upper guide columns 38 enter the upper moving space 342 through the upper guide notches 341 of the upper linear guide groove 34 (the two upper guide columns 38 and the two lower guide columns 39 are switched from “translation guide” to “compression guide”, and the moving door 2 has the freedom of horizontal (perpendicular to the translation direction) movement, which prepares for the moving door 2 to fit the annular sealing ring 112). Then, the left and right push-pull mechanisms 4 and 5 continue to act, exerting a horizontal pulling force on the left and right edges of the moving door 2, so that the inner surface edge of the moving door 2 is tightly fitted on the edge of the entrance 11 through the annular sealing ring 112, so that the moving door 2 is fully fitted with the sealing surface of the entrance 11 without local looseness or pressure concentration, so that the vacuum box 1 forms a sealed space.

[0029] The left and right push-pull mechanisms 4 and 5 each comprise a push-pull seat 41, a push-pull oil cylinder 42 and two limiting rings 43. The push-pull seat 41 is installed on the outer side wall of the vacuum box 1, the push-pull oil cylinder 42 is installed on the push-pull seat 41, the piston rod of the push-pull oil cylinder 42 extends towards the direction of the moving door 2 and is perpendicular to the inner surface of the moving door 2, and the two limiting rings 43 are fixedly installed on the end of the piston rod of the push-pull oil cylinder 42 and form a limiting clamping groove 44 therebetween. Each limiting clamping groove 44 is clamped with the corresponding left limiting notch 21 or right limiting notch 22. When the moving door 2 is closed, the left limiting notch 21 of the moving door 2 is clamped with the limiting clamping groove 44 of the left push-pull mechanism 4, and the right limiting notch 22 of the moving door 2 is clamped with the limiting clamping groove 44 of the right push-pull mechanism 5, so that the piston rod of the push-pull oil cylinder 42 is rigidly connected with the moving door 2, the pulling force is directly applied to the edge of the moving door 2, and the prerequisite for the moving door 2 to fully adhere to the sealing surface of the entrance 11 is provided, the moving door 2 is forced to accurately cooperate with the sealing surface of the entrance 11, the complete alignment of the moving door 2 with the sealing surface is ensured, and the sealing misalignment is avoided.

[0030] The left limiting block 24 is arranged on the left side edge of the moving door 2, and the left limiting notch 21 is arranged on the left limiting block 24 and has an opening facing right. The right limiting block 25 is arranged on the right side edge of the moving door 2, and the right limiting notch 22 is arranged on the right limiting block 25 and has an opening facing right. The left limiting block 24 and the right limiting block 25 provide rigid support for the edges of the moving door 2 and avoid deformation of the edges of the moving door 2 due to the notches.

[0031] The transformer oil sealing box further comprises a controller (not shown in the figure), two door opening in-place proximity switches 6 and two door closing in-place proximity switches 7. The two door closing in-place proximity switches 7 are respectively installed on the left side walls of the corresponding entrances 11, and when the two door closing in-place proximity switches 7 are respectively matched with the left side edges of the corresponding moving doors 2, the moving doors 2 are in the corresponding state with the corresponding entrances 11. The two door opening in-place proximity switches 6 are respectively installed on the outer groove walls of the corresponding lower straight guide grooves 35, and the two door opening in-place proximity switches 6 are respectively matched with the right side edges of the corresponding moving doors 2, so that the moving doors 2 are in the completely staggered state with the corresponding entrances 11. The signal output ends of the two door opening in-place proximity switches 6 and the two door closing in-place proximity switches 7 are respectively electrically connected with the corresponding signal input ends of the controller, and the two left push-pull mechanisms 4, the two right push-pull mechanisms 5 and the servo motor 31 are respectively electrically connected with the corresponding signal output ends of the controller. The door opening in-place proximity switches 6 are used to feedback the completely open state of the moving door 2 and prevent the moving door 2 from overrunning. The door closing in-place proximity switches 7 are used to feedback the completely closed state of the moving door 2 and prevent the moving door 2 from not being sealed in place.

[0032] When the mobile door 2 is to be closed, the controller sends a closing instruction to the servo motor 31, the servo motor 31 starts and drives the gear to rotate, driving the mobile door 2 to move horizontally to the right (i.e. the direction of the entrance 11), until the closing-in-place proximity switch 7 sends a closing-in-place signal to the controller, i.e. the mobile door 2 is moved to the position. When the mobile door 2 is moved to the position, the controller triggers the left and right push-pull mechanisms 4 and 5 to start, exerting a transverse pulling force on the left and right edges of the mobile door 2, so that the mobile door 2 fully fits the sealing surface of the entrance 11, i.e. the mobile door 2 completely closes the entrance 11.

[0033] When the mobile door 2 is to be opened, the controller triggers the left and right push-pull mechanisms 4 and 5 to start, exerting a transverse pushing force on the left and right edges of the mobile door 2, so that the mobile door 2 is disengaged from the sealing surface of the entrance 11; then the controller sends an opening instruction to the servo motor 31, the servo motor 31 starts and drives the gear to rotate, driving the mobile door 2 to move horizontally to the left, until the opening-in-place proximity switch 6 sends an opening-in-place signal to the controller, the mobile door 2 is moved to the position and stops moving, i.e. the mobile door 2 is in a completely open state. Through the cooperation of the controller with the opening-in-place proximity switch 6 and the closing-in-place proximity switch 7, the actions of the left and right push-pull mechanisms 4 and 5 and the servo motor 31 are controlled, realizing the full-automatic control of the mobile door 2 without manual intervention, and shortening the closing sealing time.

[0034] The left side edge of the mobile door 2 is provided with an upper limit stop block 26, which is exposed on the inner side of the inner surface of the mobile door 2, and the closing-in-place proximity switch 7 is correspondingly matched with the upper limit stop block 26; the right side edge of the mobile door 2 is provided with a lower limit stop block 27, which is exposed on the outer side of the outer surface of the mobile door 2, and the opening-in-place proximity switch 6 is correspondingly matched with the lower limit stop block 27. The upper limit stop block 26 is exposed on the inner side of the inner surface of the mobile door 2, and only when the mobile door 2 is completely moved to the position, the closing-in-place proximity switch 7 will be triggered, avoiding the misoperation of the pressing action when the mobile door 2 is not aligned; the lower limit stop block 27 is exposed on the outer side of the outer surface, accurately feeding back the state that the mobile door 2 is completely misaligned with the entrance 11 when opening, preventing overtravel operation.

[0035] The outer edge of the entrance 11 is provided with a ring-shaped groove 113 with a notch facing outward, the ring-shaped sealing ring 112 is in the ring-shaped groove 113, and the outer part of the ring-shaped sealing ring 112 protrudes outward on the edge of the entrance 11. The ring-shaped groove 113 provides a stable installation space for the ring-shaped sealing ring 112, preventing the sealing ring from falling off or deviating during the pressing and moving of the mobile door 2, and ensuring that the sealing surface is always fully covered by the ring-shaped sealing ring 112 without any missed sealing area. The outer part of the above-mentioned ring-shaped sealing ring 112 protrudes on the edge of the entrance 11, and when the mobile door 2 is pressed, the protruding part of the ring-shaped sealing ring 112 first contacts and is uniformly compressed by the inner surface of the mobile door 2, filling the small gap between the mobile door 2 and the sealing surface.

[0036] In addition, it should be noted that the specific embodiments described in the specification, the name of each part, etc. can be different, and any equivalent or simple change made in accordance with the structure, features and principles described in the utility model patent concept is included in the protection scope of the utility model patent. The skilled in the art to which the present application belongs can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as it does not deviate from the structure of the utility model or beyond the scope defined in the claims, which shall belong to the protection scope of the utility model.

Claims

1. A transformer oil injection sealing box, comprising a vacuum box, two movable doors and two movable mechanisms, two opposite side walls of the vacuum box are respectively provided with an inlet and an outlet for the transformer to pass through, the two movable doors are respectively movably installed on the outside of the two opposite side walls of the vacuum box and correspond to the corresponding inlet and outlet, and the two movable mechanisms are both installed on the vacuum box and can drive the corresponding movable door to move along the width direction of the side wall of the vacuum box; characterized in that: It also includes two left pull mechanisms capable of pulling or pushing the moving door and two right pull mechanisms capable of pulling or pushing the moving door; the edges of the two entrances are each provided with an annular sealing surface, and the annular sealing surface is provided with an annular sealing ring matched with the corresponding moving door; the two left pull mechanisms are respectively installed on the left side edges of the corresponding entrances, and the two right pull mechanisms are respectively installed on the right side edges of the corresponding entrances; the left side edge of the moving door is provided with a left limiting notch matched with the left pull mechanism by buckling, and the right side edge of the moving door is provided with a right limiting notch matched with the right pull mechanism by buckling; the moving mechanism includes a servo motor, a gear, a rack, an upper linear guide groove, a lower linear guide groove, a lower linear guide rail, two rollers, two upper guide columns and two lower guide columns; the upper linear guide groove and the lower linear guide groove are respectively installed on the upper edges and lower edges of the outer side walls of the vacuum box and are parallel to each other; the lower linear guide rail is installed on the lower edge of the outer side wall of the vacuum box and is inside the lower linear guide groove and parallel to the lower linear guide groove; the moving door is between the upper linear guide groove and the lower linear guide groove; two wheel shafts perpendicular to the width direction of the moving door are fixedly arranged on the lower edge of the moving door, the length of the wheel shafts is greater than the thickness of the rollers, the two rollers are respectively rotatably installed on the corresponding wheel shafts and can move along the axial direction of the corresponding wheel shafts, the two rollers are both on the lower linear guide rail and can move along the lower linear guide rail, the two lower guide columns are both installed on the lower edge of the moving door and can move along the lower linear guide groove, and the two upper guide columns are both installed on the upper edge of the moving door and can move along the upper linear guide groove; two lower guide notches corresponding to the corresponding lower guide columns are arranged on the inner groove wall of the lower linear guide groove, a lower moving space for the movement of the lower guide columns is arranged between the lower linear guide groove and the lower linear guide rail, and the lower moving space communicates with the lower linear guide groove through the two lower guide notches; two upper guide notches corresponding to the corresponding upper guide columns are arranged on the inner groove wall of the upper linear guide groove, and an upper moving space for the movement of the upper guide columns is arranged between the upper linear guide groove and the moving door, and the upper moving space communicates with the upper linear guide groove through the two upper guide notches; the servo motor is installed on the moving door, the gear is installed on the power output shaft of the servo motor, and the rack is installed on the lower edge of the outer side wall of the vacuum box and extends along the length direction of the lower linear guide groove; the rack is engaged with the gear.

2. The transformer oil filling and sealing tank according to claim 1, characterized in that: The left pull mechanism and the right pull mechanism each include a pull seat, a pull cylinder and two limiting rings; the pull seat is installed on the outer side wall of the vacuum box, the pull cylinder is installed on the pull seat, the piston rod of the pull cylinder extends towards the direction where the moving door is located and is perpendicular to the inner surface of the moving door, and the two limiting rings are both fixedly installed on the end of the piston rod of the pull cylinder and form a limiting clamping groove between them; each limiting clamping groove is respectively matched with the corresponding left limiting notch and the right limiting notch by buckling.

3. The transformer oil filling and sealing tank according to claim 2, characterized in that: The left limiting block is provided on the left side edge of the movable door, and the left limiting gap is provided on the left limiting block, and the opening of the left limiting gap faces right.

4. The transformer oil filling and sealing tank according to claim 1, characterized in that: The controller, two door opening to position proximity switches and two door closing to position proximity switches are further included, the two door closing to position proximity switches are respectively installed on the left side walls of the corresponding entrances, and when the two door closing to position proximity switches are respectively matched with the left side edges of the corresponding movable doors, the movable doors are in the corresponding state with the corresponding entrances; the two door opening to position proximity switches are respectively installed on the outer groove walls of the corresponding straight line guide grooves, and the two door opening to position proximity switches are respectively matched with the right side edges of the corresponding movable doors, so that the movable doors are in the completely staggered state with the corresponding entrances; the signal output ends of the two door opening to position proximity switches and the two door closing to position proximity switches are respectively electrically connected with the corresponding signal input ends of the controller, and the two left push-pull mechanisms, the two right push-pull mechanisms and the servo motor are respectively electrically connected with the corresponding signal output ends of the controller.

5. The transformer oil filling and sealing tank according to claim 4, characterized in that: The upper limiting block is provided on the left side edge of the movable door, and the upper limiting block is exposed on the inner side of the inner surface of the movable door, and the door closing to position proximity switch is matched with the upper limiting block; the lower limiting block is provided on the right side edge of the movable door, and the lower limiting block is exposed on the outer side of the outer surface of the movable door, and the door opening to position proximity switch is matched with the lower limiting block.

6. The transformer oil filling and sealing tank according to claim 1, characterized in that: The outer edge of the entrance is provided with an annular groove with a groove opening facing outward, the annular sealing ring is in the annular groove, and the outer part of the annular sealing ring is protruded outward from the edge of the entrance.

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