Pre-detection device for installation quality of transformer iron core fixing seat

Abstract

The utility model relates to the technical field of transformer quality inspection, in particular to a pre-inspection device for the installation quality of a transformer iron core fixing seat. Comprising a pre-checking table, a starting signal assembly and a support assembly which are installed on the pre-checking table, a lifting assembly installed on the support assembly, an in-place assembly installed on the lifting assembly, a lifting assembly installed on the pre-checking table and a plurality of pre-checking accessories installed on a transformer iron core fixing base. The starting signal assembly is used for detecting the gravity value of the transformer iron core fixing base, the lifting assembly is used for driving the in-place assembly to move in the vertical direction, and when the transformer iron core fixing base moves downwards in the vertical direction, the lifting assembly limits the pre-detection accessory; according to the utility model, whether the perpendicularity of the bolt hole on the transformer iron core fixing seat is qualified or not can be quickly judged in a manner of respectively measuring the bottom and the top of the pre-detection accessory and comparing the distance difference value, so that finishing is convenient and timely, and a large number of unqualified products are prevented from flowing out.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer quality inspection technical field especially relates to a kind of pre-inspection device for the installation quality of transformer core fixing seat. BACKGROUND

[0002] During the assembly of transformer core, the situation that limiting fixing seat cannot be installed due to serious deviation of the spacing of positioning screw rod is often appeared, which is mainly caused by large manufacturing deviation. After the fixing seat is welded, only the spacing size of fixed nut is measured according to the drawing, and the perpendicularity of thread and fixing seat cannot be measured, and due to the fact that finished product of installation screw rod cannot be provided during the welding process, the upper limiting block in fixing seat cannot be installed after the subsequent installation of screw rod, and the corresponding workpiece needs to be repaired by disassembling the body.

[0003] Therefore, in view of the above technical problems, a pre-inspection device for the installation quality of transformer core fixing seat is provided, which can intuitively, quickly, simply and effectively detect the manufacturing quality of transformer core clamp limiting fixing seat in the previous process. UTILITY MODEL CONTENTS

[0004] In order to overcome the problem that the fixing seat cannot be installed due to serious deviation of the spacing of positioning screw rod during the assembly of transformer core.

[0005] The technical scheme of the utility model is as follows: a pre-inspection device for the installation quality of transformer core fixing seat, comprising a pre-inspection table, a start signal assembly and a support assembly installed on the pre-inspection table, a lifting assembly installed on the support assembly, a just-in-place assembly installed on the lifting assembly, a lifting assembly installed on the pre-inspection table, and a plurality of pre-inspection accessories installed on the transformer core fixing seat, the start signal assembly is used to detect the gravity value of the transformer core fixing seat, the lifting assembly is used to drive the just-in-place assembly to move along the vertical direction, and the lifting assembly limits the pre-inspection accessories when the transformer core fixing seat moves downward along the vertical direction; a positioning column is installed on the pre-inspection table, the positioning column is used to limit the transformer core fixing seat, and a fixed scale is installed on the pre-inspection table, the fixed scale is used to measure the distance between the bottoms of two adjacent pre-inspection accessories.

[0006] Preferably, the start signal assembly comprises a cavity opened in the pre-inspection table, a first signal spring and a first tension sensor installed in the cavity, the first tension sensor is used to detect the tension value of the first signal spring and send a signal to the just-in-place assembly.

[0007] Preferably, the support assembly has two groups, and the support assembly comprises a base fixedly installed on the pre-inspection table, a stand fixedly installed on the base, a sliding table movably connected to the stand, a guide rod fixedly connected to the sliding table, and a pressing table fixedly installed at the bottom end of the guide rod, the sliding table can move along the vertical direction, and the pressing table is arranged in the hollow pre-inspection table.

[0008] As preferred, the lifting assembly comprises a cylinder mounted on the base, a second signal spring and a second tension sensor mounted in the base, the sliding table is fixedly connected to the output end of the cylinder, the cylinder is used to drive the sliding table to move in the vertical direction, the second tension sensor is used to detect the tension value of the second signal spring and send a signal to the control unit of the cylinder.

[0009] As preferred, the in-place assembly comprises a motor mounted on the sliding table, a pressing rod fixedly connected to the output end of the motor, a signal torsion spring and a torque sensor fixedly mounted in the pressing rod, the motor is used to drive the pressing rod to rotate, the torque sensor is used to detect the torque value of the signal torsion spring and send a signal to the control unit of the cylinder.

[0010] As preferred, the lifting assembly comprises a first air bag mounted in the pre-checking table, an air cylinder fixedly mounted on the pre-checking table, a first gas pipe connected between the first air bag and the air cylinder, a plunger movably connected in the air cylinder, a clamping plate fixedly mounted on the plunger, and a return spring mounted on the plunger; when the transformer core fixing seat moves downward in the vertical direction, the gas in the first air bag flows into the air cylinder through the first gas pipe, and the plunger moves upward; when the transformer core fixing seat moves upward in the vertical direction, the gas in the air cylinder flows into the first air bag through the first gas pipe, and the plunger moves downward.

[0011] As preferred, the pre-checking accessory comprises an inspection screw mounted in the bolt hole of the transformer core fixing seat, a screwing end fixedly connected to one end of the inspection screw, a magnetic attraction ring fixedly mounted on the screwing end, a clamping groove opened on the screwing end, and a locking nut screwed from the other end of the inspection screw, the magnetic attraction ring is used to attract and fix the screwing end on the transformer core fixing seat, the locking nut is used to tighten the inspection screw on the transformer core fixing seat, and the fixed ruler is used to measure the distance between two adjacent screwing ends; when the plunger moves upward, the clamping plate rises until it enters the clamping groove; when the plunger moves downward, the clamping plate descends until it is separated from the clamping groove.

[0012] As preferred, the pre-checking table is provided with an inspection assembly, the inspection assembly comprises an inflation assembly and a measuring assembly, the inflation assembly is used to drive the measuring assembly to move in the vertical direction, and the measuring assembly is used to measure the distance between the top portions of two adjacent pre-checking accessories; when the pressing table moves downward in the vertical direction, the inflation assembly drives the measuring assembly to move upward in the vertical direction; when the pressing table moves upward in the vertical direction, the inflation assembly drives the measuring assembly to move downward in the vertical direction.

[0013] As preferred, the inflating assembly comprises the second air bag and the third air bag installed in the pre-checking table and the second gas pipe connected between the second air bag and the third air bag, the second air bag is arranged below the pressing table; when the pressing table moves downward along the vertical direction, the gas in the second air bag flows into the third air bag through the second gas pipe; when the pressing table moves upward along the vertical direction, the gas in the third air bag flows into the second air bag through the second gas pipe.

[0014] As preferred, the measuring assembly comprises the telescopic frame movably connected in the pre-checking table and the movable scale installed on the upper end of the telescopic frame, the third air bag is fixedly connected below the telescopic frame, the telescopic frame is movable along the vertical direction, and the movable scale is used for measuring the distance between the top ends of the adjacent two checking screws; when the gas in the second air bag flows into the third air bag, the telescopic frame moves upward along the vertical direction; when the gas in the third air bag flows into the second air bag, the telescopic frame moves downward along the vertical direction.

[0015] The transformer core fixing seat pre-checking device has the advantages that:

[0016] 1. The bottom and the top of the pre-checking accessory are measured respectively, the distance difference is compared, the perpendicularity of the bolt hole on the transformer core fixing seat can be quickly judged, the pre-checking accessory is installed more quickly and conveniently, and a large number of unqualified products are avoided;

[0017] 2. The whole device is started by the gravity sensing action of the transformer fixing seat on the pre-checking table, manual starting is not needed, and measurement is more convenient;

[0018] 3. The clamping plate in the lifting assembly is lifted synchronously to lock the clamping hole on the pre-checking accessory in the vertical pressing and locking process of the transformer core fixing seat, the user does not need to fix the checking screw with the other hand when the locking nut is tightened, and the installation of the pre-checking accessory is more quick and convenient;

[0019] 4. The distance of the screwing end can be directly measured when the locking nut is tightened through the fixed scale, and the measurement data is more intuitive;

[0020] 5. The distance of the top end of the checking screw is quickly measured through the mode that the movable scale is lifted and positioned to the top end of the checking screw in the vertical pressing and locking process of the transformer core fixing seat, the movable scale falls back into the pre-checking table when not detected, and damage is not easy. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A transformer core installation schematic view is shown;

[0022] Figure 2 A whole structure schematic view of the pre-checking device for transformer core fixing seat installation quality of the utility model is shown;

[0023] Figure 3 A front view structure schematic diagram of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0024] Figure 4 A top view structure schematic diagram of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0025] Figure 5 A pre-check accessory structure schematic diagram of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0026] Figure 6 A pre-check device for transformer core fixing seat installation quality of the utility model is shown; Figure 4 A zoomed-in structure schematic diagram of the middle A is shown;

[0027] Figure 7 A disassembled structure schematic diagram of a support assembly and a lifting assembly of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0028] Figure 8 A structure schematic diagram of a just-in-place assembly of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0029] Figure 9 A structure schematic diagram of a lifting assembly of a pre-check device for transformer core fixing seat installation quality of the utility model is shown;

[0030] Figure 10 A structure schematic diagram of a check assembly of a pre-check device for transformer core fixing seat installation quality of the utility model is shown.

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, pre-check table; 8, fixed scale; 10, positioning column; 11, lower limit block; 12, upper limit block; 13, bolt hole; 201, concave cavity; 202, No. 1 signal spring; 203, No. 1 tension sensor; 301, base; 302, stand; 303, sliding table; 304, guide rod; 305, compression table; 401, air cylinder; 402, No. 2 signal spring; 403, No. 2 tension sensor; 501, motor; 502, pressure rod; 503, signal torsion spring; 504, torque sensor; 601, No. 1 air bag; 602, air cylinder; 603, No. 1 gas conveying pipe; 604, plunger; 605, clamping plate; 606, return spring; 701, No. 2 air bag; 702, No. 3 air bag; 703, No. 2 gas conveying pipe; 704, telescopic frame; 705, movable scale; 901, check screw; 902, screwing end; 903, magnetic attraction ring; 904, clamping groove; 905, locking nut. DETAILED DESCRIPTION

[0032] The utility model is further explained in connection with the drawings and examples.

[0033] Please refer to Figures 2-10 The utility model provides an embodiment: a kind of pre-checking device for transformer core fixing seat installation quality, including pre-checking table 1, be installed on the starting signal component and support component of pre-checking table 1, be installed on the lifting assembly of support component, be installed on the in-place component of lifting assembly, be installed on the lifting assembly of pre-checking table 1, and install several pre-checking fittings on transformer core fixing seat, starting signal component is used to detect the gravity value of transformer core fixing seat, lifting assembly is used to drive in-place component to move along vertical direction, when transformer core fixing seat is moved down along vertical direction, lifting assembly is positioned to pre-checking fitting;Positioning column 10 is installed on pre-checking table 1, and positioning column 10 is used to limit transformer core fixing seat, fixed scale 8 is installed on pre-checking table 1, and fixed scale 8 is used to measure the distance between the bottom of two adjacent pre-checking fittings, pre-checking component is installed on transformer core fixing seat (transformer core fixing seat includes lower limit block 11 and upper limit block 12, and still has the pin hole on it, and pre-checking component is fixed by pin hole, and when detecting, it can be selected one of lower limit block 11 or upper limit block 12), then place on pre-checking table 1, by positioning column 10, transformer core fixing seat is horizontally positioned and locked, after starting signal component detects the weight of transformer core fixing seat, signal is sent to in-place component, after in-place component is started, signal is sent to lifting assembly again, control lifting assembly to operate, drive in-place component to move down along vertical direction, exert vertical force on transformer core fixing seat, until the bottom of transformer core fixing seat is close to pre-checking table 1, at this time, lifting assembly stops operating, in the process of moving down of transformer core fixing seat, lifting assembly is gradually locked to pre-checking component, then by fixed scale 8 and additional scale tool, the interval of the bottom and top of adjacent pre-checking component is measured respectively, according to the difference of interval, the perpendicularity of bolt hole 13 is judged (generally, it is considered that the difference is less than 2mm is qualified).

[0034] Please refer to Figures 2-8In the embodiment, the starting signal assembly comprises a recess 201 formed on the pre-checking table 1, a first signal spring 202 and a first tension sensor 203 installed in the recess 201, the first tension sensor 203 is used for detecting the tension value of the first signal spring 202 and sending a signal to the in-place assembly; the support assembly has two groups, the support assembly comprises a base 301 fixedly installed on the pre-checking table 1, a stand 302 fixedly installed on the base 301, a sliding table 303 movably connected to the stand 302, a guide rod 304 fixedly connected to the sliding table 303 and a pressing table 305 fixedly installed at the bottom end of the guide rod 304, the sliding table 303 is movable in the vertical direction, and the pressing table 305 is arranged in the hollow pre-checking table 1; the lifting assembly comprises a cylinder 401 installed on the base 301, a second signal spring 402 and a second tension sensor 403 installed in the base 301, the sliding table 303 is fixedly connected to the output end of the cylinder 401, the cylinder 401 is used for driving the sliding table 303 to move in the vertical direction, and the second tension sensor 403 is used for detecting the tension value of the second signal spring 402 and sending a signal to the control unit of the cylinder 401.The positioning assembly comprises a motor 501 installed on the sliding platform 303, a pressing rod 502 fixedly connected to the output end of the motor 501, a signal torsion spring 503 and a torque sensor 504 fixedly installed in the pressing rod 502, the motor 501 is used to drive the pressing rod 502 to rotate, the torque sensor 504 is used to detect the torque value of the signal torsion spring 503 and send a signal to the control unit of the air cylinder 401. When the transformer core fixing seat is placed on the pre-checking table 1, it first contacts the first signal spring 202, and because of the action of gravity, it extrudes the first signal spring 202 downward, and the first signal spring 202 shrinks into the recess 201, at the same time, the first tension sensor 203 detects that the tension value of the first signal spring 202 reaches the threshold F1, and sends a signal to the control unit of the motor 501, the motor 501 starts and drives the pressing rod 502 to rotate horizontally, at the same time, the signal torsion spring 503 is twisted and generates a torque, when the torque sensor 504 detects that the torque value of the signal torsion spring 503 reaches F2, at this time, the pressing rod 502 rotates above the transformer core fixing seat, the torque sensor 504 sends a signal to the control unit of the air cylinder 401, the air cylinder 401 starts, and drives the sliding platform 303 to move downward along the stand 302, the guide rod 304 and the pressing table 305 also move downward together with the sliding platform 303, the pressing rod 502 moves downward together with the sliding platform 303 and gradually approaches the transformer core fixing seat, and continues to move downward after contacting, and applies a force on the transformer core fixing seat, until the transformer core fixing seat closely contacts the pre-checking table 1, at this time, the motor 501 also produces a pressing force on the second signal spring 402, the second tension sensor 403 detects that the tension value of the second signal spring 402 reaches F3 (in actual use, the second tension sensor 403 can also be cancelled, and the change of the tension value of the first signal spring 202 is detected by using the first tension sensor 203, which can achieve the same effect), the second tension sensor 403 sends a signal to the control unit of the air cylinder 401, so that it stops running.

[0035] Please refer to Figures 2-6 and Figure 9In the embodiment, the lifting assembly comprises a first air bag 601 installed in the pre-checking table 1, an air cylinder 602 fixedly installed on the pre-checking table 1, a first gas conveying pipe 603 connected between the first air bag 601 and the air cylinder 602, a plunger 604 movably connected in the air cylinder 602, a clamping plate 605 fixedly installed on the plunger 604, and a reset spring 606 installed on the plunger 604; when the transformer core fixing seat moves downward along the vertical direction, the gas in the first air bag 601 flows into the air cylinder 602 through the first gas conveying pipe 603, and the plunger 604 moves upward; when the transformer core fixing seat moves upward along the vertical direction, the gas in the air cylinder 602 flows into the first air bag 601 through the first gas conveying pipe 603, and the plunger 604 moves downward; the pre-checking accessory comprises an inspection screw rod 901 installed in the bolt hole 13 of the transformer core fixing seat, a screwing end 902 fixedly connected to one end of the inspection screw rod 901, a magnetic attraction ring 903 fixedly installed on the screwing end 902, a clamping groove 904 opened on the screwing end 902, and a locking nut 905 screwed from the other end of the inspection screw rod 901, the magnetic attraction ring 903 is used for attracting and fixing the screwing end 902 on the transformer core fixing seat, the locking nut 905 is used for tightening the inspection screw rod 901 on the transformer core fixing seat, and the fixed scale 8 is used for measuring the distance between two adjacent screwing ends 902; when the plunger 604 moves upward, the clamping plate 605 rises until it enters the clamping groove 904; when the plunger 604 moves downward, the clamping plate 605 descends until it is separated from the clamping groove 904; before the transformer core fixing seat is placed on the pre-checking table 1, the inspection screw rod 901 is first inserted into the bolt hole 13, and the screwing end 902 faces downward, the inspection screw rod 901 is temporarily locked with the transformer core fixing seat through the attraction of the magnetic attraction ring 903 (in actual use, other temporary fixing materials such as adhesive tape can also be used), when the transformer core fixing seat is pressed downward by the pressure rod 502, it not only exerts pressure on the first signal spring 202, but also exerts pressure on the first air bag 601 protruding from the surface of the pre-checking table 1, so that the gas in the first air bag 601 gradually flows into the air cylinder 602 through the first gas conveying pipe 603, and the plunger 604 is driven by the gas pressure to overcome the elastic force of the reset spring 606 and move upward, when the transformer core fixing seat is attached to the surface of the pre-checking table 1, the clamping plate 605 is just locked in the clamping groove 904, the screwing end 902 is locked, the inspection screw rod 901 does not rotate and move downward relative to the bolt hole 13, then the user tightens the locking nut 905 with the inspection screw rod 901, and the inspection screw rod 901 is completely fixed with the transformer core fixing seat, after tightening, the distance data between two adjacent screwing ends 902 can be directly read through the fixed scale 8 (after the transformer core fixing seat is removed, the pressure of the first air bag 601 disappears, the plunger 604 moves downward and resets under the elastic restoring force of the reset spring 606, and the gas in the air cylinder 602 reflows into the first air bag 601 to make it expand and re-expose above the surface of the pre-checking table 1).

[0036] Please refer to Figures 2-5 , Figure 7 and Figure 10 , in this embodiment, the pre-checking table 1 is provided with a checking assembly, the checking assembly comprises an inflation assembly and a measuring assembly, the inflation assembly is used to drive the measuring assembly to move in the vertical direction, and the measuring assembly is used to measure the distance between the top of two adjacent pre-checking accessories; when the pressing table 305 moves downward in the vertical direction, the inflation assembly drives the measuring assembly to move upward in the vertical direction; when the pressing table 305 moves upward in the vertical direction, the inflation assembly drives the measuring assembly to move downward in the vertical direction; the inflation assembly comprises a second air bag 701 and a third air bag 702 which are installed in the pre-checking table 1 and a second gas conveying pipe 703 which is connected between the second air bag 701 and the third air bag 702, and the second air bag 701 is arranged below the pressing table 305; when the pressing table 305 moves downward in the vertical direction, the gas in the second air bag 701 flows into the third air bag 702 through the second gas conveying pipe 703; when the pressing table 305 moves upward in the vertical direction, the gas in the third air bag 702 flows into the second air bag 701 through the second gas conveying pipe 703; the measuring assembly comprises a telescopic frame 704 which is movably connected in the pre-checking table 1 and a movable scale 705 which is installed on the upper end of the telescopic frame 704, and the third air bag 702 is fixedly connected below the telescopic frame 704, the telescopic frame 704 can move in the vertical direction, and the movable scale 705 is used to measure the distance between the top of two adjacent checking screw rods 901; when the gas in the second air bag 701 flows into the third air bag 702, the telescopic frame 704 moves upward in the vertical direction; when the gas in the third air bag 702 flows into the second air bag 701, the telescopic frame 704 moves downward in the vertical direction, the slide table 303 moves downward together with the guide rod 304 and the pressing table 305 at the same time when the transformer core fixing seat is pressed downward, the pressing table 305 generates extrusion force on the second air bag 701, the gas in the second air bag 701 flows into the third air bag 702 through the second gas conveying pipe 703, the third air bag 702 expands and lifts the telescopic frame 704 upward, the telescopic frame 704 drives the movable scale 705 to move upward synchronously, the movable scale 705 is lifted to the vicinity of the top of the checking screw rod 901 when the transformer core fixing seat is attached to the surface of the pre-checking table 1, the distance data between the top of two adjacent checking screw rods 901 is directly read through the movable scale 705, and the distance data between the corresponding two screw ends 902 is compared, when the difference is not greater than 2mm, the perpendicularity of the pin hole 13 of the transformer core fixing seat is qualified (when the cylinder 401 drives the slide table 303, the guide rod 304 and the pressing table 305 to move upward, the extrusion force of the second air bag 701 disappears, the gas in the third air bag 702 flows into the second air bag 701 again, the third air bag 702 contracts, the telescopic frame 704 falls back, and the movable scale 705 is retracted into the pre-checking table 1).

Claims

1. A pre-check device for transformer core fixing seat installation quality, comprising a pre-check table (1); characterized in that: The pre-checking platform (1) is provided with a starting signal assembly and a support assembly installed on the pre-checking platform (1), a lifting assembly installed on the support assembly, a positioning assembly installed on the lifting assembly, a lifting assembly installed on the pre-checking platform (1), and a plurality of pre-checking accessories installed on the transformer core fixing seat, the starting signal assembly is used for detecting the gravity value of the transformer core fixing seat, the lifting assembly is used for driving the positioning assembly to move in the vertical direction, and the lifting assembly limits the pre-checking accessories when the transformer core fixing seat moves downward in the vertical direction. The pre-checking platform (1) is provided with a positioning column (10) for limiting the transformer core fixing seat, and a fixed scale (8) installed on the pre-checking platform (1) for measuring the distance between the bottoms of two adjacent pre-checking accessories.

2. The pre-checking device for the installation quality of the fixing base of the transformer core according to claim 1, characterized in that: The starting signal assembly comprises a cavity (201) formed in the pre-checking platform (1), a first signal spring (202) and a first tension sensor (203) installed in the cavity (201), the first tension sensor (203) is used for detecting the tension value of the first signal spring (202) and sending a signal to the positioning assembly.

3. The pre-checking device for the installation quality of the fixing base of the transformer core according to claim 2, characterized in that: The support assembly has two groups, and the support assembly comprises a base (301) fixedly installed on the pre-checking platform (1), a stand (302) fixedly installed on the base (301), a sliding table (303) movably connected to the stand (302), a guide rod (304) fixedly connected to the sliding table (303), and a pressing table (305) fixedly installed at the bottom end of the guide rod (304), the sliding table (303) can move in the vertical direction, and the pressing table (305) is arranged in the hollow pre-checking platform (1).

4. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 3, characterized in that: The lifting assembly comprises a cylinder (401) installed on the base (301), a second signal spring (402) and a second tension sensor (403) installed in the base (301), the sliding table (303) is fixedly connected to the output end of the cylinder (401), the cylinder (401) is used for driving the sliding table (303) to move in the vertical direction, and the second tension sensor (403) is used for detecting the tension value of the second signal spring (402) and sending a signal to the control unit of the cylinder (401).

5. The pre-checking device for the installation quality of the fixing base of the transformer core according to claim 4, characterized in that: The positioning assembly comprises a motor (501) installed on the sliding table (303), a pressing rod (502) fixedly connected to the output end of the motor (501), a signal torsion spring (503) fixedly installed in the pressing rod (502), and a torque sensor (504), the motor (501) is used for driving the pressing rod (502) to rotate, and the torque sensor (504) is used for detecting the torque value of the signal torsion spring (503) and sending a signal to the control unit of the cylinder (401).

6. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 5, characterized in that: The lifting assembly comprises a first gas bag (601) installed in the pre-checking platform (1), a gas cylinder (602) fixedly installed on the pre-checking platform (1), a first gas pipe (603) connected between the first gas bag (601) and the gas cylinder (602), a plunger (604) movably connected in the gas cylinder (602), a clamping plate (605) fixedly installed on the plunger (604), and a reset spring (606) installed on the plunger (604). When the transformer core fixing seat moves downward along the vertical direction, the gas in the first air bag (601) flows into the air cylinder (602) through the first gas pipe (603), and the plunger (604) moves upward; when the transformer core fixing seat moves upward along the vertical direction, the gas in the air cylinder (602) flows into the first air bag (601) through the first gas pipe (603), and the plunger (604) moves downward.

7. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 6, characterized in that: The pre-inspection accessory includes an inspection screw (901) installed in the bolt hole (13) of the transformer core fixing seat, a screw end (902) fixedly connected to one end of the inspection screw (901), a magnetic attraction ring (903) fixed on the screw end (902), a clamping groove (904) opened on the screw end (902), and a locking nut (905) screwed from the other end of the inspection screw (901), the magnetic attraction ring (903) is used to adsorb and fix the screw end (902) on the transformer core fixing seat, the locking nut (905) is used to tighten the inspection screw (901) on the transformer core fixing seat, and the fixed scale (8) is used to measure the distance between two adjacent screw ends (902); When the plunger (604) moves upward, the clamping plate (605) rises until it enters the clamping groove (904); when the plunger (604) moves downward, the clamping plate (605) descends until it is separated from the clamping groove (904).

8. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 7, characterized in that: The pre-inspection platform (1) is provided with an inspection assembly, the inspection assembly includes an inflation assembly and a measurement assembly, the inflation assembly is used to drive the measurement assembly to move along the vertical direction, and the measurement assembly is used to measure the distance between the top portions of two adjacent pre-inspection accessories. When the compression platform (305) moves downward along the vertical direction, the inflation assembly drives the measurement assembly to move upward along the vertical direction; when the compression platform (305) moves upward along the vertical direction, the inflation assembly drives the measurement assembly to move downward along the vertical direction.

9. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 8, characterized in that: The inflation assembly includes a second air bag (701) and a third air bag (702) installed in the pre-inspection platform (1) and a second gas pipe (703) connected between the second air bag (701) and the third air bag (702), and the second air bag (701) is arranged below the compression platform (305); When the compression platform (305) moves downward along the vertical direction, the gas in the second air bag (701) flows into the third air bag (702) through the second gas pipe (703); when the compression platform (305) moves upward along the vertical direction, the gas in the third air bag (702) flows into the second air bag (701) through the second gas pipe (703).

10. The pre-checking device for the installation quality of the transformer core fixing seat according to claim 9, characterized in that: The measurement assembly includes a telescopic frame (704) movably connected in the pre-inspection platform (1) and a movable scale (705) installed on the upper end of the telescopic frame (704), the third air bag (702) is fixedly connected below the telescopic frame (704), the telescopic frame (704) can move along the vertical direction, and the movable scale (705) is used to measure the distance between the top ends of two adjacent inspection screws (901); When the gas in the second air bag (701) flows into the third air bag (702), the telescopic frame (704) moves upward along the vertical direction; when the gas in the third air bag (702) flows into the second air bag (701), the telescopic frame (704) moves downward along the vertical direction.

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