Novel prepressing device

Abstract

The utility model relates to the technical field of transformer processing equipment, in particular to a novel pre-pressing device. The pre-pressing device comprises a base frame and portal frames fixed to the two ends of the base frame, a pre-pressing mechanism is assembled between the portal frames and the base frame and comprises a hydraulic rod, a pressing disc and a bearing disc, the hydraulic rod is fixed to the top of the inner side of each portal frame, the pressing disc is fixed to the output end of each hydraulic rod, and the bearing disc is assembled to the top of the base frame. An auxiliary mechanism is assembled between the base frame and the bearing disc. According to the coil pre-pressing device, through the structural design of the pre-pressing mechanism and the auxiliary mechanism, in the process of pre-pressing the coil in the vertical direction, the coil can be conveniently limited in multiple directions in the horizontal direction, the coil is prevented from deviating, the pre-pressing quality and the application efficiency of the coil are improved, and through the structural design of the adjusting mechanism, the coil pre-pressing efficiency is improved. And the position of the clamping plate can be adjusted, the stroke of the clamping plate can be adjusted and controlled conveniently, and the application range is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer processing equipment, in particular to a novel pre-pressing device. Background Art

[0002] Double-layer preloading technology involves applying two stages of preloading during the compression process, aiming to increase the material's density and structural stability. This process begins by applying an initial, relatively low pressure to achieve the desired shape and density. Subsequently, a higher pressure is applied to further compress the material to the desired final shape and density. For example, the coils in a transformer often exhibit resilience during assembly, making bolts and nuts prone to loosening after prolonged operation.

[0003] For example, a novel transformer coil preload fixing device with a publication number of CN210015768U includes a pad for fixing the coil and a fixing mechanism for pressing the pad; the fixing mechanism includes a fixing frame and upper clamps provided at the left and right ends of the fixing frame; the upper clamps are provided with a pressing assembly for pressing the pad and an adjusting assembly for adjusting the preload force of the pressing assembly;

[0004] Based on the above, it can be seen that the following technical problems exist in the existing technology: In order to avoid the natural rebound of the coil when installing the transformer, the existing technology usually uses a pre-stressing device to fix the shape of the coil. However, the existing technology is limited to applying pressure in the vertical direction, which causes the coil to be easily offset after being compressed in this direction due to the lack of limit in the horizontal direction, thereby affecting the quality of the coil. For this reason, we propose a new pre-stressing device. Utility Model Content

[0005] The purpose of the present invention is to provide a novel pre-pressing device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A new pre-stressing device includes a base frame and a gantry fixed at both ends of the base frame. A pre-stressing mechanism is installed between the gantry and the base frame. The pre-stressing mechanism includes a hydraulic rod, a pressure plate and a bearing plate. A hydraulic rod is fixed to the top of the inner side of the gantry, and a pressure plate is fixed to the output end of the hydraulic rod. A bearing plate is installed on the top of the base frame, and an auxiliary mechanism is installed between the base frame and the bearing plate.

[0008] Preferably, the auxiliary mechanism includes a driving member and a guiding member, a mounting opening is opened on the inner side of the base frame, a top plate is fixed on the top of the base frame, a driving member is assembled on the inner side of the mounting opening, and a guiding member is assembled on the inner side of the driving member.

[0009] Preferably, the driving component includes a motor, a force worm, a force worm wheel, a central shaft and a rotating disk. The motor is fixed to one end of the inner side of the mounting port, the force worm is fixed to the output end of the motor, the outer side of the force worm is meshedly connected to the force worm wheel, the inner side of the force worm wheel is fixed to the central shaft, both ends of the central shaft are rotatably connected to the base frame through bearings, and the top of the central shaft passes through the top plate and is fixed with a rotating disk.

[0010] Preferably, the guide member includes a mounting ring, an arc-shaped through groove, a sliding rod, a movable column and a splint. The top of the top plate is fixed with a mounting ring, the rotating plate is gap-fitted with the mounting ring, a plurality of arc-shaped through grooves are evenly distributed on the top of the rotating plate, the inner sides of the arc-shaped through grooves are slidably connected with sliding rods, a movable column is fixed at both ends of the sliding rod, the movable column is slidably connected to the mounting ring, and a splint is assembled on the outer side of the movable column.

[0011] Preferably, a regulating mechanism is installed between the base frame and the gantry, and the regulating mechanism includes a controller, a torque sensor and an alarm. The controller is fixed at one end of the gantry, a torque sensor is provided on the outside of the motor output end, and an alarm is fixed on the top of the gantry. The controller is electrically connected to the motor, torque sensor and alarm through wires.

[0012] Preferably, an adjustment mechanism is installed between the movable column and the splint, and the adjustment mechanism is used to adjust the position of the splint.

[0013] Preferably, the adjustment mechanism includes an L-shaped clamping rod, a matching guide groove and a threaded rod. An L-shaped clamping rod is fixed to one side of the splint, and a matching guide groove corresponding to the position of the L-shaped clamping rod is provided on the top of the movable column. The matching guide groove is slidingly connected to the L-shaped clamping rod, and a threaded rod is rotatably connected to the two ends of the inner side of the matching guide groove. One end of the movable column is rotatably connected to a hand rod, and one end of the hand rod passes through the matching guide groove and is fixed to the threaded rod, and the threaded rod is threadedly connected to the L-shaped clamping rod.

[0014] It can be seen without a doubt that the above-mentioned technical solution of this application can definitely solve the technical problem to be solved by this application.

[0015] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0016] 1. The structural design of the preloading mechanism and the auxiliary mechanism of the utility model makes it easy for the device to limit the horizontal direction of the coil in multiple directions during the process of preloading the coil in the vertical direction, thereby preventing the coil from deflecting and improving the preloading quality of the coil and its application efficiency.

[0017] 2. The present invention adopts the structural design of the adjustment mechanism, so that the device can adjust the position of the splint, which is convenient for regulating the stroke of the splint and improves the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the base frame and the top plate of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the top plate and the mounting ring of the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-section structure of the movable column of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] In the figure: 1. Base frame; 2. Gantry; 3. Hydraulic rod; 4. Pressure plate; 5. Loading plate; 6. Mounting port; 7. Top plate; 8. Mounting ring; 9. Motor; 10. Force worm; 11. Force worm gear; 12. Center shaft; 13. Rotating plate; 14. Arc groove; 15. Sliding rod; 16. Movable column; 17. Clamp; 18. Controller; 19. Torque sensor; 20. Alarm; 21. L-shaped clamping rod; 22. Matching guide groove; 23. Threaded rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Example 1

[0027] Reference Figure 1-4A new type of pre-stressing device includes a base frame 1 and a gantry 2 fixed at both ends of the base frame 1. A pre-stressing mechanism is installed between the gantry 2 and the base frame 1. The pre-stressing mechanism includes a hydraulic rod 3, a pressure plate 4 and a bearing plate 5. The hydraulic rod 3 is fixed to the top of the inner side of the gantry 2, and the pressure plate 4 is fixed to the output end of the hydraulic rod 3. The top of the base frame 1 is equipped with a bearing plate 5, and an auxiliary mechanism is installed between the base frame 1 and the bearing plate 5.

[0028] The auxiliary mechanism includes a driving member and a guiding member. A mounting opening 6 is provided on the inner side of the base frame 1. A top plate 7 is fixed on the top of the base frame 1. The driving member is assembled on the inner side of the mounting opening 6, and the guiding member is assembled on the inner side of the driving member. The driving part includes a motor 9, a force worm 10, a force worm wheel 11, a central shaft 12 and a rotating disk 13. The motor 9 is fixed at one end inside the mounting port 6, and the output end of the motor 9 is fixed with the force worm 10. The outer side of the force worm 10 is meshed with the force worm wheel 11, and the inner side of the force worm wheel 11 is fixed with the central shaft 12. Both ends of the central shaft 12 are rotatably connected to the base frame 1 through bearings. The top of the central shaft 12 passes through the top plate 7 and is fixed with a rotating disk 13. When the motor 9 is started, the output end of the motor 9 drives the force worm 10 to mesh with the force worm wheel 11 to rotate, and then when the rotating disk 13 rotates, the slide rod 15 moves along the inner side of the arc-shaped through groove 14, so that the multiple movable columns 16 drive the splint 17 to move toward the center of the principle supporting disk 5.

[0029] The guide member includes a mounting ring 8, an arcuate through groove 14, a sliding rod 15, a movable column 16 and a splint 17. The mounting ring 8 is fixed to the top of the top plate 7, and the rotating disk 13 is clearance-matched with the mounting ring 8. A plurality of arcuate through grooves 14 are evenly distributed on the top of the rotating disk 13. The inner sides of the arcuate through grooves 14 are slidably connected with sliding rods 15. A movable column 16 is fixed at both ends of the sliding rod 15. The movable column 16 is slidably connected to the mounting ring 8. The outer side of the movable column 16 is equipped with a splint 17, and the inner side of the splint 17 is provided with an insulating buffer pad, which can provide protection when the splint 17 squeezes the coil.

[0030] A regulating mechanism is installed between the base frame 1 and the gantry 2. The regulating mechanism includes a controller 18, a torque sensor 19 and an alarm 20. The controller 18 is fixed to one end of the gantry 2, and a torque sensor 19 is provided on the outside of the output end of the motor 9. The alarm 20 is fixed to the top of the gantry 2. The controller 18 is electrically connected to the motor 9, the torque sensor 19 and the alarm 20 through a wire. The torque threshold of the torque sensor 19 is set by the controller 18, and then the motor 9 is started. When the splint 17 is squeezed on the coil, the output torque of the motor 9 reaches the set threshold. The torque sensor 19 transmits the signal to the controller 18. The controller 18 processes the signal and sends a shutdown command to the motor 9 and a start command to the alarm 20 to remind the user that the motor 9 has been turned off. The controller 18 is a Siemens S7-1200 or S7-1500 series, the motor 9 is a Y series or YE series, and the torque sensor 19 is a D-2431DH-15. Since electrical components of different brands and models have different interfaces and connection methods, they need to be connected and configured according to the specific product manual and technical specifications in actual applications.

[0031] Example 2

[0032] Further optimize Example 1, specifically, as Figure 4 As shown, an adjustment mechanism is installed between the movable column 16 and the clamping plate 17 , and the adjustment mechanism is used to adjust the position of the clamping plate 17 .

[0033] The adjusting mechanism includes an L-shaped clamping rod 21, a matching guide groove 22 and a threaded rod 23. An L-shaped clamping rod 21 is fixed on one side of the splint 17. A matching guide groove 22 corresponding to the position of the L-shaped clamping rod 21 is provided on the top of the movable column 16. The matching guide groove 22 is slidingly connected to the L-shaped clamping rod 21. A threaded rod 23 is rotatably connected to both ends of the inner side of the matching guide groove 22. One end of the movable column 16 is rotatably connected to a hand rod, one end of the hand rod passes through the matching guide groove 22 and is fixed to the threaded rod 23. The threaded rod 23 is threadedly connected to the L-shaped clamping rod 21. When the position of the splint 17 needs to be adjusted, the hand rod is rotated so that the hand rod drives the threaded rod 23 to rotate, and then the L-shaped clamping rod 21 can drive the splint 17 to move along the inner side of the matching guide groove 22.

[0034] From the above, we can know that:

[0035] The present invention addresses the following technical issues: In order to prevent the coil from rebounding naturally during transformer installation, a pre-compression device is typically used to fix the coil's shape. However, the prior art is limited to applying pressure in the vertical direction, which results in the coil being easily deflected due to the lack of horizontal restraint after being compressed in that direction, thereby affecting the coil's quality. The technical solutions of the aforementioned embodiments are adopted. Furthermore, the implementation process of the aforementioned technical solutions is as follows:

[0036] During use, the coil is first placed on the carrier plate 5, and a pad is set on the top of the coil. Then the hydraulic rod 3 is started, and the output end of the hydraulic rod 3 drives the pressure plate 4 to move downward, so that the pressure plate 4 rests on the pad and presses the pad down a certain distance. Then the hydraulic rod 3 is closed, and then the motor 9 is started. The output end of the motor 9 drives the force worm 10 to engage the force worm wheel 11 to rotate, because the force worm wheel 11 is fixed to the central shaft 12, the central shaft 12 is fixed to the rotating disk 13, and the arc groove 14 is fixed to the slide rod. 15 is slidably connected, the slide rod 15 is fixed to the movable column 16, and the movable column 16 is slidably connected to the mounting ring 8, so that when the rotating disk 13 rotates, the slide rod 15 can move along the inner side of the arc-shaped through groove 14, so that multiple movable columns 16 drive the splints 17 to move toward the center of the supporting disk 5 until multiple splints 17 are against the outside of the coil, and finally the hydraulic rod 3 is started again, so that the hydraulic rod 3 drives the pressure plate 4 to continue to press the pad downward, so that the coil will not be offset under the limit of the splint 17.

[0037] Through the above configuration, this application can certainly solve the above technical problems and achieve the following technical effects:

[0038] 1. The structural design of the preloading mechanism and the auxiliary mechanism of the utility model makes it easy for the device to limit the horizontal direction of the coil in multiple directions during the process of preloading the coil in the vertical direction, thereby preventing the coil from deflecting and improving the preloading quality of the coil and its application efficiency.

[0039] 2. The present invention uses the structural design of the adjustment mechanism to enable the device to adjust the position of the splint 17, thereby facilitating the control of the stroke of the splint 17 and improving the scope of application.

[0040] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. A new preloading device, characterized in that: The invention comprises a base frame (1) and a gantry (2) fixed at both ends of the base frame (1); a pre-pressing mechanism is installed between the gantry (2) and the base frame (1); the pre-pressing mechanism comprises a hydraulic rod (3), a pressure plate (4) and a bearing plate (5); a hydraulic rod (3) is fixed to the top of the inner side of the gantry (2); a pressure plate (4) is fixed to the output end of the hydraulic rod (3); a bearing plate (5) is installed at the top of the base frame (1); and an auxiliary mechanism is installed between the base frame (1) and the bearing plate (5).

2. A novel preloading device according to claim 1, characterized in that: The auxiliary mechanism includes a driving member and a guiding member. A mounting opening (6) is provided on the inner side of the base frame (1). A top plate (7) is fixed on the top of the base frame (1). The driving member is assembled on the inner side of the mounting opening (6), and the guiding member is assembled on the inner side of the driving member.

3. A novel preloading device according to claim 2, characterized in that: The driving member includes a motor (9), a force worm (10), a force worm wheel (11), a central shaft (12) and a rotating disk (13); the motor (9) is fixed to one end of the inner side of the mounting port (6); the force worm (10) is fixed to the output end of the motor (9); the outer side of the force worm (10) is meshedly connected to the force worm wheel (11); the inner side of the force worm wheel (11) is fixed to the central shaft (12); both ends of the central shaft (12) are rotatably connected to the base frame (1) through bearings; the top of the central shaft (12) passes through the top plate (7) and is fixed with a rotating disk (13).

4. A novel preloading device according to claim 3, characterized in that: The guide member includes a mounting ring (8), an arcuate groove (14), a slide rod (15), a movable column (16) and a clamping plate (17). The top of the top plate (7) is fixed with a mounting ring (8). The rotating plate (13) is clearance-matched with the mounting ring (8). The top of the rotating plate (13) is evenly distributed with a plurality of arcuate grooves (14). The inner sides of the arcuate grooves (14) are slidably connected with slide rods (15). A movable column (16) is fixed at both ends of the slide rod (15). The movable column (16) is slidably connected with the mounting ring (8). The outer side of the movable column (16) is equipped with a clamping plate (17).

5. A novel preloading device according to claim 3, characterized in that: A regulating mechanism is installed between the base frame (1) and the gantry (2), and the regulating mechanism includes a controller (18), a torque sensor (19) and an alarm (20). The controller (18) is fixed to one end of the gantry (2), a torque sensor (19) is provided on the outside of the output end of the motor (9), and the alarm (20) is fixed to the top of the gantry (2). The controller (18) is electrically connected to the motor (9), the torque sensor (19) and the alarm (20) through a wire.

6. A novel preloading device according to claim 4, characterized in that: An adjustment mechanism is installed between the movable column (16) and the clamping plate (17), and the adjustment mechanism is used to adjust the position of the clamping plate (17).

7. A novel preloading device according to claim 6, characterized in that: The adjusting mechanism comprises an L-shaped holding rod (21), a matching guide groove (22) and a threaded rod (23); an L-shaped holding rod (21) is fixed to one side of the splint (17); a matching guide groove (22) corresponding to the position of the L-shaped holding rod (21) is provided on the top of the movable column (16); the matching guide groove (22) is slidably connected to the L-shaped holding rod (21); a threaded rod (23) is rotatably connected to the two ends of the inner side of the matching guide groove (22); one end of the movable column (16) is rotatably connected to a hand rod; one end of the hand rod passes through the matching guide groove (22) and is fixed to the threaded rod (23); the threaded rod (23) is threadedly connected to the L-shaped holding rod (21).

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