CN117761363B - PT resonance elimination device experiment detection platform - Google Patents

Abstract

The present invention relates to a PT harmonic elimination test platform for harmonic elimination. The main body of the harmonic elimination base is in the shape of a single-mouth straight cylinder, and a pair of ear blocks which can be bolted to a ground point and are symmetrically arranged are provided on the outer side surface of the bottom end of the cylinder. The inspection platform includes: a table top, an inspection seat and a limiter assembly. By utilizing the cooperation between the alignment groove provided on the ear block of the harmonic elimination base and the alignment protrusion provided on the inspection seat, the inspector only needs to place the harmonic elimination in front of the inspection seat and move it to the inspection seat so that the alignment groove engages with the alignment protrusion until the harmonic elimination can no longer be moved backward, so that the locking tongue can be automatically locked into the ear hole of the ear block provided on the harmonic elimination base. No wrench is needed, which saves time for tightening or loosening the bolts, and is conducive to improving the inspection efficiency.

Description

A PT detuning device experimental testing platform

Technical Field

The invention relates to a harmonic elimination device, in particular to a PT harmonic elimination device experimental detection platform.

Background technique

An ideal voltage transformer overvoltage suppression device is one in which its resistance can automatically adjust to a suitable resistance value to play a damping role when an overvoltage occurs in the voltage transformer, thereby effectively suppressing the PT overvoltage; when the PT is operating normally, its resistance will not affect the PT and the power system in which it is located.

Among them, PTC materials with positive temperature coefficient characteristics are good materials for making thermistors. That is, when the temperature of the PTC resistor rises to a certain threshold, its resistivity will increase sharply to a high resistance state under extremely small temperature rise conditions; when the temperature of the PTC resistor drops to a certain threshold, its resistivity will drop rapidly to a low resistance state under extremely small temperature drop conditions.

Since different types or specifications of PTC resistors have different temperature thresholds that cause their resistivity to change sharply, therefore, whether in the selection test of PTC resistors or in the production of thermistor eliminators after the selection of PTC resistors, it is necessary to conduct experimental tests on the test objects or the finished thermistor eliminators.

In experimental testing, in order to test whether the thermistor eliminator can suppress PT overvoltage, a simulation test is often performed. That is, the base of the thermistor eliminator is installed on the grounding point for testing, and then the lead connector of the input end of the thermistor eliminator is installed at the neutral point of the high-voltage side of the PT for testing, and then the transmission bus supplies power to the PT to simulate the overvoltage state, and finally the external aviation connector of the thermistor eliminator base is connected to the current transformer plug it is adapted to, so as to collect the current size in the measurement circuit and the current size when suppressing PT overvoltage.

In this case, the base of the thermal detuning device needs to be installed on the grounding point for inspection by tightening the bolts with the help of a wrench, so as to fasten the base of the thermal detuning device to the grounding point for inspection with the bolts. When a large number of PTC resistor selection tests or finished thermal detuning device inspections are conducted, the inspectors will tighten or loosen the bolts with the help of a wrench many times during the sequential replacement of several inspection objects, thus increasing the total time of the operation.

Summary of the invention

In order to solve the problem raised in the above background technology that when a large number of PTC resistor selection tests or thermistor detuning product inspections are carried out, the inspectors will use a wrench to tighten or loosen the bolts many times during the period of sequentially replacing the inspection objects, resulting in a long total operation time and lowering the inspection efficiency, the present invention provides the following technical solutions:

A PT detuning device experimental detection platform comprises a detuning device base located at the bottom of the detuning device and a test table for placing the detuning device.

The main body of the harmonic elimination base is in the shape of a single-port straight cylinder, and an aviation socket is embedded in the side of the cylinder for connecting to an external current transformer, and a pair of ear blocks that are symmetrically arranged on the outer surface of the bottom of the cylinder are provided, which can be bolted to the grounding point. A calibration groove that can correct the position of the harmonic elimination base is opened on the side of the rear of the outer end of the two ear blocks. The two calibration grooves are arranged symmetrically, and the groove directions of the two calibration grooves form an "eight"-shaped distribution. The groove cavity wall of the calibration groove is surrounded by three planes, namely the upper wall, the inner wall and the lower wall, in a "匚"-shaped distribution, and the horizontal cross-section of the calibration groove is an inferior arc.

The inspection table includes a tabletop for performing a harmonic elimination inspection operation thereon, an inspection seat for placing the harmonic elimination and cooperating with the alignment groove to calibrate the position of the harmonic elimination base so as to ground it, and a stopper assembly for cooperating with the inspection seat and the alignment groove to lock the harmonic elimination base. The inspection seat includes a seat plate embedded in the upper surface of the tabletop and a grounding busbar connecting the seat plate and passing through the tabletop, and the stopper assembly includes a stopper located directly below the inspection seat and a stopper mounting frame for mounting the stopper on the bottom surface of the tabletop.

Furthermore, the upper wall and the lower wall in the cavity wall of the calibration groove are parallel and symmetrical. The upper and lower edges of the inner wall in the cavity wall of the calibration groove are adjacent to the upper wall and the lower wall in the cavity wall of the calibration groove respectively, and the inner wall is perpendicular to the upper wall and the lower wall adjacent to it.

Furthermore, the wide side of the "eight" shape formed by the two alignment grooves is oriented in the same direction as the aviation socket. The alignment groove portion of the wide side of the "eight" shape formed by the two alignment grooves is located at the outer end of the ear block provided on the base of the detuning device.

Furthermore, a bolt hole for connecting the resistor lead wire of the detuning device is provided on the bottom surface of the cylinder cavity of the detuning device base. A through hole for embedding an aviation socket is provided on the side wall of the cylinder body of the detuning device base.

Furthermore, the table top includes: a seat groove, a lock hole and a wiring groove.

The seat groove is provided on the upper surface of the table for embedding the seat plate. The lock hole 1 is provided on the bottom surface of the groove cavity at the left and right ends of the seat groove, and the lock hole 1 is in the shape of a through hole and can be aligned with the ear holes of the ear block provided on the base of the detuning device. The wiring groove is provided at the rear of the left and right ends of the seat groove, and the wiring groove runs through the table.

Furthermore, the groove cavity profile of the seat groove is adapted to the bottom contour of the seat plate, and the depth of the groove cavity is the same as the main body thickness of the seat plate. There are two lock holes, and the two lock holes are symmetrically distributed. There are two wiring grooves, and the two wiring grooves are symmetrically distributed, and the wiring grooves are connected to the seat groove.

Furthermore, the main body of the seat plate is in the shape of a plate, and its contour is adapted to the bottom contour of the harmonic elimination base, and the left and right ends of the main body are provided with a second lock hole aligned with the first lock hole, and the second lock hole can be aligned with the ear hole of the ear block provided on the harmonic elimination base. The two ends of the main body of the seat plate are provided with a wiring block for installing a grounding busbar, and the inner side wall of the top of the wiring block extends inward to form a calibration protrusion adapted to the calibration groove.

Furthermore, the grounding busbar passes through the wiring slot, one end of which is fastened to the wiring block by bolts, and the other end of which is connected in series with a grounding resistor for grounding.

Furthermore, the limiter comprises: an electromagnetic lock, a spring and a lock head.

The electromagnetic lock is unlocked by electric control. The spring uses its own elasticity to make the limiter automatically complete the locking action of the detuning base. The lock head is used to lock the detuning base.

Furthermore, the top of the iron core of the electromagnetic lock is a threaded structure, which is used to thread a nut that limits the lock head from being separated from the iron core. The outer wall of the coil shell of the electromagnetic lock is provided with a protrusion adapted to the limiter mounting frame, and the protrusion is provided with a screw hole. The spring is sleeved on the upper rod body of the electromagnetic lock iron core, one end of which abuts against the top wall of the electromagnetic lock, and the other end of which abuts against the bottom wall of the lock head. The lock head includes: a bow arm and a lock tongue.

Furthermore, the middle part of the bow arm is sleeved on the upper rod body of the electromagnetic lock core, and its bottom wall is in contact with the top of the spring. There are two lock tongues, and the two lock tongues are respectively arranged on the top walls at both ends of the bow arm. The inclined tongue surface of the lock tongue is inclined forward and downward, and the lock tongue is inserted into the lock hole 1 and the lock hole 2 aligned therewith, and the lower edge of the inclined tongue surface of the lock tongue is lower than the upper plate surface of the seat plate body.

Furthermore, the stopper mounting frame includes a pair of L-rods symmetrically arranged front and back. The top of the rod body is fastened to the bottom surface of the table by bolts, and the bottom end of the rod body is provided with a through hole adapted to the protrusion provided by the electromagnetic lock. The coil housing of the electromagnetic lock can be fastened to the bottom end of the stopper mounting frame by using the screw hole provided by the protrusion and the screws and washers adapted thereto.

Compared with the prior art, the present invention has the following beneficial effects:

1. By using the alignment groove of the ear block of the eliminator base and the alignment protrusion of the inspection seat, the inspector only needs to place the eliminator in front of the inspection seat and move it toward the inspection seat so that the alignment groove engages with the alignment protrusion until the eliminator can no longer be moved backward. In this way, the lock tongue can be automatically locked into the ear hole of the ear block of the eliminator base. The inspector does not need to deliberately aim and align the ear hole and the lock tongue, and does not need to use a wrench.

Second, the method of automatically locking the lock tongue into the ear hole of the ear block provided on the base of the harmonic eliminator directly replaces the installation operation of fixing the harmonic eliminator with bolts, saving the time of tightening or loosening the bolts, which is conducive to improving the inspection efficiency.

3. The limiter adopts an electrically controlled electromagnetic lock to control the locking, which can easily and quickly release the lock on the detuning device base, so that the inspector can quickly remove the inspected detuning device from the inspection seat.

Fourth, the calibration slot is designed by slotting the side wall of the ear block of the base of the detuning device, which does not change the space occupied by the original outer contour of the detuning device and does not affect the transportation method of the detuning device. That is, it is convenient for manufacturers to continue to use the packaging boxes used in the past for transportation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an assembly diagram of a harmonic elimination device installed at an automatic locking mechanism for inspection in the present invention;

FIG2 is an enlarged view of point A in FIG1 of the present invention;

FIG3 is a schematic diagram of the structure of the harmonic elimination device in the present invention;

FIG4 is an enlarged view of point B in FIG3 of the present invention;

FIG5 is a top view of the base of the harmonic elimination device in the present invention;

FIG6 is an enlarged view of point C in FIG5 of the present invention;

FIG7 is a top view of the structure of the inspection station of the present invention;

FIG8 is a bottom view of the structure of the inspection table of the present invention;

FIG9 is a schematic diagram of the structure of the table in the present invention;

FIG10 is a schematic diagram of the structure of the inspection seat in the present invention;

FIG11 is an exploded view of the structure of the inspection seat in the present invention;

FIG12 is a schematic diagram of the structure of the seat plate of the present invention;

FIG13 is a schematic diagram of the structure of the limiter assembly of the present invention;

FIG14 is an exploded view of the structure of the stopper in the present invention;

FIG15 is a schematic diagram of the structure of the lock in the present invention;

FIG. 16 is an exploded view of the structure of the limiter mounting frame when it is on both sides of the limiter in the present invention.

In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

01-Detuning device;

011- detuning device base, 012- aviation socket, 013- calibration slot;

1- Inspection table;

100-table, 101-seat slot, 102-locking hole 1, 103-wiring slot;

200-Inspection seat;

210-base plate, 201-second lock hole, 211-wiring block, 202-positioning protrusion, 220-grounding busbar;

300-stopper assembly;

310-limiter, 311-electromagnetic lock, 312-spring, 313-lock head, 301-bow arm, 302-lock tongue;

320-Stopper mounting bracket.

Detailed ways

The preferred specific embodiments for implementing the present invention are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

Please refer to Figures 1 to 6, the present invention provides a PT detuning device experimental detection platform, which includes a detuning base 011 at the bottom of the detuning device 01, an aviation socket 012 embedded in the side wall of the detuning base 011, and a calibration slot 013 provided at the ear block of the detuning base 011; and also includes a test bench 1 for placing the detuning device 01.

The internal resistor of the harmonic eliminator 01 is a PTC thermistor with a positive temperature coefficient characteristic. The top of the PTC thermistor is connected to the end of the top cable of the harmonic eliminator 01 through a lead, and the head end of the cable is used to connect the neutral point of the PT high-voltage side; the bottom of the PTC thermistor is connected to the bottom surface of the barrel cavity of the harmonic eliminator base 011 through a lead, wherein the lead also passes through the inner cavity of the coil set in the barrel cavity of the harmonic eliminator base 011, and the coil is used to sense the current value of the lead.

The main body of the harmonic elimination base 011 is in the shape of a single-mouth straight cylinder. A pair of ear blocks are provided on the outer surface of the bottom end of the cylinder, namely, the ear blocks of the harmonic elimination base 011. The two ear blocks are symmetrically distributed, and from the top view, the center points of the ear holes of the two ear blocks are in the same straight line as the center point of the harmonic elimination base 011.

Preferably, bolt holes for connecting the resistance leads of the detuning device 01 are provided on the bottom surface of the cylinder cavity of the detuning device base 011, and through holes for embedding the aviation socket 012 are provided on the side walls of the cylinder of the detuning device base 011.

In the present invention, the detuning device base 011 is placed at the grounding point for installing the detuning device 01, and the ear holes of the ear blocks of the detuning device base 011 are aligned with the mounting holes at the grounding point, and the detuning device base 011 can be fastened to the grounding point using bolts and nuts that are adapted to the ear holes and the mounting holes.

The head end of the aviation socket 012 is exposed outside the side wall of the detuning device base 011, which is convenient for connecting to the aviation plug of the external current transformer. The tail end of the aviation socket 012 is placed inside the side wall of the detuning device base 011, and the wiring terminals of the tail end are respectively connected to the wiring terminals of the coils arranged in the barrel cavity of the detuning device base 011, so as to use the current transformer connected to the aviation socket 012 to monitor the current value change when the detuning device suppresses the PT overvoltage.

There are two alignment grooves 013, and these two alignment grooves 013 are respectively opened on the side surfaces of the two ear blocks of the detuner base 011 at the rear. In the body of the ear block, the ear block part farthest from the center of the detuner base 011 is the outer end of the ear block. The two alignment grooves 013 are arranged in a bilaterally symmetrical shape, and the groove cavity directions of the two alignment grooves 013 jointly form an "eight"-shaped distribution. Among them, the narrow mouth side formed by the "eight"-shaped distribution is facing the rear; and the wide mouth side formed by the "eight"-shaped distribution is facing the front and the direction is the same as the direction of the aviation socket 012. In addition, the alignment groove 013 part of the wide mouth side is at the outer end of the ear block of the detuner base 011.

Preferably, the cavity wall of the calibration groove 013 is surrounded by three planes, namely, the upper wall, the inner wall and the lower wall, in a "匚"-shaped distribution manner, and the horizontal cross-section of the calibration groove 013 is in the shape of a minor arc. Among them, the upper wall and the lower wall in the cavity wall of the calibration groove 013 are parallel and symmetrical up and down; the upper and lower edges of the inner wall in the cavity wall of the calibration groove 013 are respectively connected to the upper wall and the lower wall in the cavity wall of the calibration groove 013, and the inner wall is perpendicular to the upper wall and the lower wall adjacent to it.

In the present invention, the alignment groove 013 is formed by cutting a groove on the side wall of the ear block of the detuning device base 011, which does not change the space occupied by the original outer contour of the detuning device 01 and does not affect the transportation method of the detuning device 01, that is, it is convenient for manufacturers to continue to use the packaging boxes used in the past for transportation.

Please refer to Figures 1, 2, 7-16. The inspection table 1 provided by the present invention includes: a table top 100 as an inspection operation table for the tuner 01, an inspection seat 200 for placing the tuner 01 and cooperating with the alignment groove 013 to calibrate the position of the tuner base 011 to make it grounded, and a limiter assembly 300 for cooperating with the inspection seat 200 and the alignment groove 013 to lock the tuner base 011.

The upper surface of the table 100 is provided with a seat groove 101 for embedding the seat plate 210. The groove contour of the seat groove 101 is adapted to the bottom contour of the seat plate 210, and the depth of the groove is the same as the thickness of the main body of the seat plate 210, so that the detuning device base 011 can be smoothly pushed along the upper surface of the table 100 to the upper surface of the main body of the seat plate 210.

A lock hole 102 is respectively provided on the bottom surface of the groove cavity at the left and right ends of the seat groove 101, and the lock hole 102 is in the shape of a through hole and can be aligned with the ear hole of the ear block of the detuning device base 011. Among them, the two lock holes 102 are distributed in a left-right symmetrical shape.

A wiring slot 103 is respectively provided at the rear of the left and right ends of the seat groove 101, and the wiring slot 103 runs through the upper and lower surfaces of the table top 100. The two wiring slots 103 are distributed in a left-right symmetrical shape, and the wiring slot 103 is connected to the seat groove 101.

The inspection seat 200 includes a seat plate 210 embedded in the upper surface of the table 100 and a ground busbar 220 connected to the seat plate 210 and passing through the table 100 .

Preferably, the main body of the seat plate 210 is in the shape of a plate, and its contour matches the bottom contour of the detuning base 011. The left and right ends of the main body of the seat plate 210 each have a second lock hole 201 aligned with the first lock hole 102, and the second lock hole 201 can be aligned with the ear hole of the ear block of the detuning base 011.

Preferably, a terminal block 211 for installing the grounding busbar 220 is provided at each end of the seat plate 210 body, and the inner side wall of the top of the terminal block 211 extends inward to form a positioning protrusion 202 adapted to the positioning groove 013.

In the present invention, the grounding busbar 220 passes through the wiring slot 103, one end of which is fastened to the wiring block 211 by bolts, and the other end of which is connected in series with a grounding resistor for grounding.

In the present invention, the detuning base 011 is placed on the table 100 and is in front of the inspection seat 200. In this way, the detuning base 011 can be adjusted so that the narrow side formed by the two alignment grooves 013 faces the center of the inspection seat 200, and then the detuning base 011 is pushed along the table to move it to the top of the seat plate 210. At this time, the two alignment grooves 013 are respectively engaged with the two alignment protrusions 202, and the pushing of the detuning base is prevented. In this way, the inspector can realize that the detuning base 011 is correctly placed above the seat plate 210, and the inspector does not need to deliberately correct it. At the same time, the stopper assembly 300 also completes the locking of the ear block of the detuning base 011.

The stopper assembly 300 includes a stopper 310 located directly below the inspection seat 200 and a stopper mounting frame 320 for mounting the stopper 310 on the bottom surface of the table 100 .

The limiter 310 includes: an electromagnetic lock 311 that is unlocked by electronic control, a spring 312 that uses its own elasticity to automatically complete the locking action of the limiter 310 on the detuning base 011, and a lock head 313 for locking the detuning base 011.

Preferably, the top of the iron core of the electromagnetic lock 311 is a threaded structure for threading a nut that limits the lock head from being separated from the iron core. The outer side wall of the coil shell of the electromagnetic lock 311 is provided with a protrusion adapted to the limiter mounting bracket 320, and the protrusion is provided with a screw hole.

Preferably, the spring 312 is sleeved on the upper rod of the iron core of the electromagnetic lock 311 , one end of the spring 312 abuts against the top wall of the electromagnetic lock 311 , and the other end of the spring 312 abuts against the bottom wall of the lock head 313 .

Preferably, the lock head 313 includes a bow arm 301 and a lock tongue 302 .

The middle part of the bow arm 301 is sleeved on the upper rod body of the iron core of the electromagnetic lock 311, and its bottom wall is in contact with the top end of the spring 312.

There are two locking tongues 302, and the two locking tongues are respectively arranged on the top walls at both ends of the bow arm 301. In addition, the inclined tongue surface of the locking tongue 302 is inclined forward and downward, and the locking tongue 302 is inserted into the lock hole 102 and the lock hole 201 aligned therewith, and the lower edge of the inclined tongue surface of the locking tongue 302 is lower than the upper plate surface of the seat plate 210 body.

The stopper mounting frame 320 includes a pair of L-rods symmetrically arranged front and back, the top of the rod body is fastened to the bottom surface of the table 100 by bolts, and the bottom end of the rod body is provided with a through hole adapted to the protrusion provided on the electromagnetic lock 311. In this way, the coil housing of the electromagnetic lock 311 can be fastened to the bottom end of the stopper mounting frame 320 by using the screw hole provided on the protrusion and the screws and washers adapted thereto.

In the present invention, when the detuning device base 011 is pushed to move directly above the inspection seat 200, before the alignment groove 013 is engaged with the alignment protrusion 202, the rear edge of the bottom edge of the detuning device base 011 will first contact the inclined tongue surface of the lock tongue 302, and continue to squeeze the inclined tongue surface of the lock tongue 302 during the subsequent backward movement. At this time, the inclined tongue surface of the lock tongue 302 is forced to move downward until it is completely retracted into the second lock hole 201. During the downward movement of the lock tongue 302, the spring 312 is compressed.

In the present invention, when the alignment groove 013 is fully engaged with the alignment protrusion 202, the ear hole of the ear block of the detuning device base 011 is aligned with the second lock hole 201. At this time, the lock tongue 302 loses the obstruction of the bottom wall of the detuning device base 011, and the lock tongue 302 is reset under the elastic characteristics of the spring 312, and is automatically plugged into the ear hole of the ear block of the detuning device base 011, completing the locking of the detuning device base 011, and preventing the detuning device 01 from being separated from the inspection seat 200 during the inspection process.

In the present invention, when the inspection is completed and the lock tongue 302 needs to be released from the detuner base 011, the coil of the electromagnetic lock 311 is energized by turning on the electric control switch of the electromagnetic lock 311, so that the coil establishes a magnetic field and drives the iron core of the electromagnetic lock 311 downward under the action of the magnetic field force, so that the lock tongue 302 is retracted into the lock hole 201 to release the lock on the detuner base 011.

Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the present invention. In addition, any non-creative modifications made to the present invention by those skilled in the art without creative work still fall within the protection scope of the present invention.

Claims (12)

1. A PT detuning device experimental detection platform, comprising a detuning device base (011) at the bottom of the detuning device (01) and a test table (1) for placing the detuning device (01), characterized in that: The main body of the harmonic elimination base (011) is in the shape of a single-port straight cylinder, and an aviation socket (012) is embedded in the side of the cylinder for connecting to an external current transformer, and a pair of ear blocks that are symmetrically arranged on the outer side of the bottom of the cylinder are fastened to the grounding point by bolts, and a calibration groove (013) that can calibrate the position of the harmonic elimination base (011) is opened on the side of the rear of the outer ends of the two ear blocks, and the two calibration grooves (013) are arranged in a symmetrical shape, and the groove directions of the two calibration grooves (013) form an "eight"-shaped distribution mode, and the groove wall surface of the calibration groove (013) is surrounded by three planes, namely, an upper wall surface, an inner wall surface and a lower wall surface, in a "匚"-shaped distribution mode, and the horizontal cross-section of the calibration groove (013) is in the shape of a minor arc; The inspection table (1) comprises a tabletop (100) for performing inspection operations on the detuning device (01), an inspection seat (200) for placing the detuning device (01) and cooperating with the alignment groove (013) to calibrate the position of the detuning device base (011) so as to ground it, and a stopper assembly (300) for cooperating with the inspection seat (200) and the alignment groove (013) to lock the detuning device base (011); The inspection seat (200) comprises a seat plate (210) embedded in the upper surface of the table top (100) and a grounding busbar (220) connected to the seat plate (210) and penetrating the table top (100); The stopper assembly (300) comprises a stopper (310) located directly below the inspection seat (200) and a stopper mounting frame (320) for mounting the stopper (310) on the bottom surface of the table (100); the stopper (310) is provided with a locking tongue (302) capable of locking the detuning device base (011); The inspection seat (200) is provided with a positioning protrusion (202) that can cooperate with a positioning groove (013) provided on an ear block of the detuning device base (011). The inspector only needs to place the detuning device (01) in front of the inspection seat (200) and move it toward the inspection seat (200) so that the positioning groove (013) engages with the positioning protrusion (202) until the detuning device (01) cannot be moved backward any further, and the locking tongue (302) of the stopper (310) can be automatically locked into the ear hole of the ear block provided on the detuning device base (011). 2. The PT detuning device experimental detection platform according to claim 1 is characterized by: The upper wall surface and the lower wall surface of the groove cavity wall of the alignment groove (013) are vertically parallel and symmetrical; The upper and lower edges of the inner wall surface of the calibration groove (013) are respectively adjacent to the upper wall surface and the lower wall surface of the calibration groove (013), and the inner wall surface is perpendicular to the upper wall surface and the lower wall surface adjacent to it. 3. The PT detuning device experimental detection platform according to claim 2 is characterized by: The wide side of the "eight" shape formed by the two alignment grooves (013) is oriented in the same direction as the aviation socket (012); The "eight" shape formed by the two alignment grooves (013) has the alignment groove (013) on the wide side thereof located at the outer end of the ear block provided on the base (011) of the harmonic elimination device. 4. The PT detuning device experimental detection platform according to claim 1 is characterized by: The bottom surface of the barrel cavity of the detuning device base (011) is provided with a bolt hole for connecting the resistance lead wire of the detuning device (01); A through hole for embedding an aviation socket (012) is provided on the side wall of the cylinder of the detuning device base (011). 5. The PT detuning device experimental detection platform according to claim 1, characterized in that the table (100) comprises: A seat groove (101) is provided on the upper surface of the table top (100) and is used for embedding the seat plate (210); The first locking hole (102) is provided on the bottom surface of the groove cavity at the left and right ends of the seat groove (101), and the first locking hole (102) is in the shape of a through hole and can be aligned with the ear holes of the ear block provided on the detuning device base (011); The wiring groove (103) is arranged at the rear of the left and right ends of the seat groove (101), and the wiring groove (103) penetrates the table top (100). 6. The PT detuning device experimental detection platform according to claim 5 is characterized by: The groove cavity profile of the seat groove (101) is adapted to the bottom contour of the seat plate (210), and the depth of the groove cavity is the same as the main body thickness of the seat plate (210); There are two locking holes (102) in total, and the two locking holes (102) are distributed in a left-right symmetrical manner; There are two wiring slots (103) in total, and the two wiring slots (103) are distributed in a left-right symmetrical manner, and the wiring slots (103) are connected to the seat slot (101). 7. The PT detuning device experimental detection platform according to claim 5 is characterized by: The main body of the seat plate (210) is in the shape of a plate, and its contour matches the bottom contour of the detuning device base (011). The left and right ends of the main body are provided with a second lock hole (201) aligned with the first lock hole (102), and the second lock hole (201) can be aligned with the ear hole of the ear block provided on the detuning device base (011); Both ends of the seat plate (210) body are provided with connection blocks (211) for mounting the grounding busbar (220), and the inner side wall at the top of the connection block (211) extends inwardly to form a positioning protrusion (202) adapted to the positioning groove (013). 8. The PT detuning device experimental detection platform according to claim 7 is characterized in that: the grounding busbar (220) passes through the wiring slot (103), one end of which is fastened to the wiring block (211) by bolts, and the other end of which is connected in series with a grounding resistor for grounding. 9. The PT detuning device experimental detection platform according to claim 7, characterized in that the stopper (310) comprises: An electromagnetic lock (311) which is unlocked by electronic control; A spring (312) which uses its own elasticity to enable the stopper (310) to automatically complete the locking action of the detuning device base (011); A lock (313) is used to lock the detuning device base (011). 10. The PT detuning device experimental detection platform according to claim 9, characterized in that: The top of the iron core of the electromagnetic lock (311) is a threaded structure for threading a nut that limits the lock head from being separated from the iron core; the outer side wall of the coil shell of the electromagnetic lock (311) is provided with a protrusion adapted to the limiter mounting frame (320), and the protrusion is provided with a screw hole; The spring (312) is sleeved on the upper rod body of the iron core of the electromagnetic lock (311), one end of the spring abuts against the top wall of the electromagnetic lock (311), and the other end of the spring abuts against the bottom wall of the lock head (313); The lock head (313) comprises a bow arm (301) and a lock tongue (302). 11. The PT detuning device experimental detection platform according to claim 10, characterized in that: The middle part of the bow arm (301) is sleeved on the upper rod body of the iron core of the electromagnetic lock (311), and the bottom wall thereof abuts against the top end of the spring (312); There are two locking tongues (302) in total, and the two locking tongues are respectively arranged on the top walls at both ends of the bow arm (301), and the inclined tongue surface of the locking tongue (302) is inclined forward and downward, and the locking tongue (302) is inserted into the first lock hole (102) and the second lock hole (201) aligned therewith, and the lower edge of the inclined tongue surface of the locking tongue (302) is lower than the upper plate surface of the seat plate (210) body. 12. The PT detuning device experimental detection platform according to claim 10 is characterized in that: the limiter mounting frame (320) includes a pair of L-rods arranged symmetrically in front and back, the top of the rod body is fastened to the bottom surface of the table (100) by bolts, and the bottom end of the rod body is provided with a through hole adapted to the protrusion provided by the electromagnetic lock (311), and the coil shell of the electromagnetic lock (311) can be fastened to the bottom end of the limiter mounting frame (320) by using the screw hole provided by the protrusion and the adapted screws and gaskets.