CN203658568U - Low-voltage current transformer calibrating device - Google Patents

Abstract

The utility model discloses a low-voltage current transformer verification device, which comprises: a test bench and an automatic connection and disconnection device, the automatic connection and disconnection device includes a mounting frame, a primary wiring assembly, a secondary wiring assembly and a through-core assembly. The feed-through assembly is installed on the test bench, and the installation frame is arranged on the side of the test bench at a position corresponding to the feed-through end of the feed-through assembly, and the primary wiring assembly and the secondary wiring assembly are installed in cooperation with each other. on the mount. The utility model solves the need to configure two testing devices in the prior art by adopting the technical scheme of installing the primary wiring assembly and the secondary wiring assembly on the same mounting frame, and installing the through-core assembly on the test bench. The problem of large footprint caused by the platform. Applicable to the verification of transformers.

Description

Low-voltage current transformer verification device

technical field

The utility model relates to the verification field of low-voltage current transformers, in particular to a verification device for low-voltage current transformers.

Background technique

With the rapid development of my country's electric power industry, as one of the important components of electric energy metering devices, the use of metering transformers has also increased simultaneously, and these metering transformers must pass the verification of the transformer metering verification department before use. Only then can it be used, so that the transformer measurement verification department, especially the provincial and municipal transformer measurement verification department, also increases the transformer verification amount. At present, some provinces (such as: Zhejiang, Jiangsu, etc.) are gradually transitioning to the management mode of centralized bidding, centralized procurement, centralized inspection, and unified distribution of transformers at the provincial and municipal levels. The transformation of this management mode has greatly increased the workload of provincial and municipal measurement and verification departments. The annual inspection quantity of some city-level transformer measurement and verification departments has reached about 100,000, which has prompted relevant departments to adopt more advanced verification methods and More advanced management methods enable the calibration of transformers to be completed efficiently and accurately to meet the development needs of the electric power industry.

At present, the domestic low-voltage current transformer verification device can realize the simultaneous verification of up to twelve transformer errors. The verification items include insulation resistance measurement, power frequency withstand voltage test, secondary winding turn-to-turn dielectric strength test, and magnetic saturation margin. Measurement and basic error measurement, this multi-simultaneous verification device has developed relatively mature in terms of technology, implementation plan, speed, computer management, and automatic data processing. However, the low-voltage current transformer verification device also has the following problems in use:

Since the insulation resistance measurement and the power frequency withstand voltage test are tested on the insulation withstand voltage test bench of the low-voltage current transformer verification device, the inter-turn insulation strength test of the secondary winding, the magnetic saturation margin measurement and the basic error measurement are performed on the The test is carried out on the error test bench of the low-voltage current transformer verification device, so the low-voltage current transformer verification bench needs to be equipped with two test benches, thus increasing the floor area of the low-voltage current transformer verification bench; When testing on a test bench, it is necessary to connect and disconnect the wires separately, and the process is complicated.

Contents of the invention

The purpose of this utility model is to provide a low-voltage current transformer testing device with a small footprint and simple process in order to overcome the above-mentioned deficiencies in the background technology.

In order to achieve the above purpose, a low-voltage current transformer verification device provided by the utility model includes: a test bench and an automatic connection and disconnection device, and the automatic connection and disconnection device includes a mounting frame, a primary wiring assembly, a secondary wiring assembly and Feedthrough assembly, the feedthrough assembly is installed on the test bench, the installation frame is arranged on the side of the test bench at a position corresponding to the feedthrough end of the feedthrough assembly, the primary wiring assembly and the secondary wiring assembly They are respectively installed on the mounting brackets in cooperation with each other. By adopting the technical scheme of installing the primary wiring assembly and the secondary wiring assembly on the same mounting frame, and installing the through-hole assembly on the test bench, it solves the problem caused by the need to configure two test benches in the prior art. At the same time, when the verification device performs insulation resistance measurement, power frequency withstand voltage test, secondary winding inter-turn insulation strength test, magnetic saturation margin measurement and basic error measurement, only one connection, The stitches are removed, and the procedure is simple.

In the above solution, the primary wiring assembly includes a primary electric cylinder, a primary positioning guide plate, a primary beam, a primary air gripper, a double-end pressing rod and a primary joint assembly, and the primary joint assembly is installed on the double-end One end or both ends of the compression rod, the two double-ended compression rods are respectively installed on the two movable ends of the same primary air claw, the primary air claw is installed on the lower end of the primary beam, and the upper end of the primary beam is Connected with the telescopic end of the primary electric cylinder, the cylinder part of the primary electric cylinder is installed on the mounting frame through the primary positioning guide plate;

The secondary wiring assembly includes a secondary electric cylinder, a secondary positioning guide plate, a secondary beam and a secondary pressing pin assembly, the secondary pressing pin assembly is installed at the lower end of the secondary beam, and the secondary The upper end of the beam is connected to the telescopic end of the secondary electric cylinder, and the cylinder part of the secondary electric cylinder is installed on the mounting frame through the secondary positioning guide plate;

The core assembly includes a track laid on the test bench, a slide bar slidably installed on the track, a slide bar motor that drives the slide bar to slide on the track, and longitudinally arranged along the track. The through-rod slide frame and the through-rod slidingly installed on the through-rod slide, one end of the through-through rod is connected with the slide bar. The two joint assemblies are connected by the double-ended pressing rod, so that the joint assembly can be installed on one air claw, that is, a transformer can be pressed between two adjacent air claws, thereby reducing The number of air claws is reduced, and the cost is reduced, and a plurality of air claws share one electric cylinder through the primary beam, reducing the number of electric cylinders, further reducing the cost and having a compact structure and a small volume; at the same time, multiple secondary The secondary pressing needle assembly shares one electric cylinder through the secondary crossbeam, which further reduces the number of electric cylinders, further reduces the cost and is compact in structure and small in volume; One motor reduces the number of motors, further reduces the cost, and has a compact structure and a small volume.

In the above solution, the number of the primary cross beams and the number of the secondary cross beams are respectively consistent with the number of the through rods. By adopting the technical scheme of matching multiple primary beams, secondary beams and piercing rods, the verification device can simultaneously verify multiple rows of transformers, thereby improving the efficiency of the verification device.

In the above solution, the number of primary joint assemblies on a single primary beam and the number of secondary pressing needle assemblies on a single secondary beam match each other, and there is at least one set. By setting a plurality of matching primary joint assemblies and multiple secondary pressure pin assemblies on the single primary beam and the single secondary beam, in this way, each row of the verification device can simultaneously verify multiple mutual inductance The device further improves the efficiency of the verification device.

In the above scheme, a first through-rod support assembly for supporting the through-rod is provided at a position corresponding to the through-hole end of the through-hole assembly on the test platform, and the first through-rod support assembly includes a support bracket and a supporting air claw, the supporting air claw is installed on the test bench at a position corresponding to the through-core end of the through-core assembly through the support bracket.

In the above solution, a support platform is provided on the opposite side of the installation frame to the test platform, and a second through-hole rod support assembly for supporting the through-hole rod is arranged on the support platform, and the second The piercing rod support assembly includes a supporting frame and a supporting cylinder that cooperate with each other. The supporting frame is installed on the support platform at a position corresponding to the piercing end of the piercing assembly, and the supporting cylinder is vertically installed in the supporting frame. .

In the above solution, the support platform and the test platform are respectively arranged on both sides of the installation frame, and the support platform and the test platform are integral structures, which further reduces the volume of the verification device .

Compared with the prior art, the utility model fully demonstrates its superiority in that:

1. By adopting the technical solution of installing the primary wiring assembly and the secondary wiring assembly on the same mounting frame, and installing the through-core assembly on the test bench, it solves the problem of having to configure two test benches in the prior art The problem of large footprint caused by it;

2. When the verification device performs insulation resistance measurement, power frequency withstand voltage test, secondary winding inter-turn insulation strength test, magnetic saturation margin measurement and basic error measurement, it only needs to be connected and disconnected once, and the process is simple;

3. Connect the two joint assemblies through the double-ended pressing rod, so that two pairs of joint assemblies can be installed on one air claw, that is, one transformer can be pressed between two adjacent air claws , thereby reducing the number of air claws and reducing the cost, and multiple air claws share one electric cylinder through the primary crossbeam, reducing the number of electric cylinders, further reducing the cost and having a compact structure and small volume;

4. A plurality of secondary press needle assemblies share one electric cylinder through the secondary crossbeam, which further reduces the number of electric cylinders, further reduces costs, and has a compact structure and small volume;

5. A plurality of piercing rods use the same motor through the sliding rod, which reduces the number of motors, further reduces the cost, and has a compact structure and small volume;

6. By adopting the technical scheme of supporting a plurality of said primary beams, secondary beams and piercing rods, the verification device can simultaneously verify multiple rows of transformers, thereby improving the efficiency of the verification device;

7. By setting a plurality of matching primary joint assemblies and a plurality of secondary pressing pin assemblies on the single primary beam and the single secondary beam, in this way, each row of the verification device can simultaneously verify multiple A transformer further improves the efficiency of the verification device.

The utility model has the advantages of small size, simple process, low cost and high efficiency.

Description of drawings

Fig. 1 is the structural representation of present embodiment;

Fig. 2 is a schematic diagram of the front view of Fig. 1;

Fig. 3 is a schematic diagram of the left view structure of Fig. 1;

Fig. 4 is a rear view structural schematic diagram of Fig. 1;

Fig. 5 is a top view structural schematic diagram of Fig. 4;

FIG. 6 is another structural schematic diagram of the present embodiment after the transmission device 3 is removed;

Fig. 7 is the schematic diagram of the structure after removing the test bench and the mounting frame for the present embodiment;

Fig. 8 is a side view structural schematic diagram of Fig. 7;

Fig. 9 is a rear view structural schematic diagram of Fig. 7;

Fig. 10 is a schematic structural view of only one set of primary wiring assembly and secondary wiring assembly in Fig. 7;

Fig. 11 is a side view structural schematic diagram of Fig. 10;

Fig. 12 is a schematic structural diagram of only one wiring assembly retained in Fig. 7;

Fig. 13 is a side view structural schematic diagram of Fig. 12;

Fig. 14 is a structural schematic diagram of a wiring assembly;

Fig. 15 is a schematic structural diagram of only retaining the secondary wiring assembly in Fig. 7;

Fig. 16 is a side view structural schematic diagram of Fig. 15;

Fig. 17 is a schematic structural diagram of a secondary wiring assembly;

FIG. 18 is a schematic structural diagram of the transmission device in this embodiment;

Figure 19 is a schematic side view of the structure of Figure 18;

Fig. 20 is a schematic top view of Fig. 19;

Fig. 21 is a rear view structural schematic diagram of Fig. 18;

Fig. 22 is a schematic structural view of the positioning mechanism of the transformer tray when it is in a retracted state;

Fig. 23 is a structural schematic diagram when the transformer tray positioning mechanism is in an extended state;

Fig. 24 is a schematic structural diagram of the use status of this embodiment;

Fig. 25 is a schematic diagram of the front view of Fig. 24;

Fig. 26 is a schematic diagram of the structure of Fig. 25 during primary wiring;

Fig. 27 is a schematic structural diagram of Fig. 25 during secondary wiring;

Fig. 28 is a schematic diagram of the structure when Fig. 25 is passed through the heart.

In the figure, the test bench 1, the automatic connection and disconnection device 2, the installation frame 2a, the primary wiring assembly 2b, the primary electric cylinder 2b1, the primary positioning guide plate 2b2, the primary beam 2b3, the primary air claw 2b4, and the double-ended pressing rod 2b5, Primary connector assembly 2b6, secondary wiring assembly 2c, secondary electric cylinder 2c1, secondary positioning guide plate 2c2, secondary beam 2c3, secondary pressing needle assembly 2c4, core-through assembly 2d, track 2d1, slide bar 2d2, Sliding rod motor 2d3, piercing rod carriage 2d4, piercing rod 2d5, first piercing rod supporting assembly 2e, supporting bracket 2e1, supporting air gripper 2e2, second piercing rod supporting assembly 2f, supporting frame 2f1, supporting cylinder 2f2, transmission device 3, double-speed chain transmission mechanism 3a, bracket 3a1, double-speed chain 3a2, transport motor 3a3, transformer tray positioning mechanism 3b, guide rail 3b1, liftable positioning support platform assembly 3b2, positioning bottom plate 3b2a, electric positioning pin 3b2b , The transformer tray support table 3b2c, the positioning motor 3b3, the sensor 3b4, the stop plate 3b5, the support table 4, and the transformer tray 5.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the utility model.

As shown in Figure 1, when the utility model is used in practice, it needs to be equipped with a transmission device 3 to form an automatic test line for a transformer. 5 transporting from the last step station to the transmission device 3 of the connecting and disconnecting station of the automatic connecting and disconnecting device 2;

The automatic connection and disconnection device 2 includes a mounting frame 2a, a primary wiring assembly 2b, a secondary wiring assembly 2c, and a core-through assembly 2d, the core-through assembly 2d is installed on the test bench 1, and the mounting frame 2a is arranged At the position on the side of the test bench 1 corresponding to the through-hole end of the lead-through assembly 2d, the primary wiring assembly 2b and the secondary wiring assembly 2c are respectively mounted on the mounting frame 2a in cooperation with each other;

By adopting the technical scheme of installing the primary wiring assembly 2b and the secondary wiring assembly 2c on the same mounting frame 2a, and installing the through-hole assembly 2d on the test bench 1, it solves the problem of the need to configure two wiring assemblies in the prior art. The problem of large floor area caused by a test bench; at the same time, when this verification line is used for insulation resistance measurement, power frequency withstand voltage test, secondary winding inter-turn insulation strength test, magnetic saturation margin measurement and basic error measurement, only It needs to be connected and disconnected once, and the process is simple.

The transmission device 3 includes a double-speed chain transmission mechanism 3a and a transformer tray positioning mechanism 3b, and the double-speed chain transmission mechanism 3a includes a support 3a1, a double-speed chain 3a2 laid on both sides of the top of the support 3a1 and driving the double-speed chain 3a2 The transport motor 3a3; the transformer tray positioning mechanism 3b includes a guide rail 3b1 laid on the support 3a1, a liftable positioning support platform assembly 3b2 slidably installed on the guide rail 3b1 and used to drive the liftable The positioning support platform assembly 3b2 is a positioning motor 3b3 that slides on the guide rail 3b1; the transformer tray positioning mechanism 3b is provided with an initial station, an odd-numbered transformer verification station and an even-numbered transformer verification station.

By adopting the technical scheme of setting the transformer tray positioning mechanism 3b with odd-numbered transformer verification stations and even-numbered transformer verification stations, the number of transformers that can be verified in this verification line at one time is increased, thereby improving the verification. line efficiency.

The above-mentioned positioning motor 3b3 is a servo motor, which is installed on the bracket 3a1 corresponding to the position between the two guide rails 3b1, and the servo motor drives the liftable positioning support platform assembly 3b2 on the guide rail through a belt 3b1, the servo motor can accurately control the moving position of the liftable positioning support platform assembly 3b2, so that the odd-numbered and even-numbered transformers on the transformer tray 5 can be accurately controlled to move sequentially to the Connecting to the dismantling station, thereby increasing the number of transformers that can be verified by this verification line at one time, and further improving the efficiency of this verification line.

The above-mentioned primary wiring assembly 2b includes a primary electric cylinder 2b1, a primary positioning guide plate 2b2, a primary beam 2b3, a primary air claw 2b4, a double-ended pressing rod 2b5 and a primary joint assembly 2b6, and the primary joint assembly 2b6 is installed on the One or both ends of the double-ended pressing rod 2b5, the two double-ended pressing rods 2b5 are respectively installed on the two movable ends of the same primary air claw 2b4, and the primary air claw 2b4 is installed on the primary beam 2b3 The lower end, the upper end of the primary beam 2b3 is connected to the telescopic end of the primary electric cylinder 2b1, and the cylinder body part of the primary electric cylinder 2b1 is installed on the mounting frame 2a through the primary positioning guide plate 2b2. The structure of the primary joint assembly 2b6 can refer to the Chinese patent 201220593783.5 primary compression wiring assembly, which will not be repeated here.

Connect the two joint assemblies 2b6 through the double-ended pressing rod 2b5, so that two pairs of the joint assemblies 2b6 can be installed on one air claw 2b4, that is, the two adjacent air claws 2b4 can be compressed One transformer, thereby reducing the number of air claws 2b4 and reducing the cost; at the same time, multiple air claws 2b4 share one electric cylinder through the primary beam 2b3, reducing the number of electric cylinders, further reducing the cost and compact structure, small volume.

As shown in Figure 14, the specific action process of the primary wiring assembly 2b is as follows (see Figure 12, Figure 13 and Figure 26):

Primary wiring process: first, the primary electric cylinder 2b1 drives the primary beam 2b3 to move downward, thereby driving the primary joint assembly 2b6 on the primary air gripper 2b4 to move down to the working position; then, the transmission device 3 Transport the transformer tray 5 with the transformer to the connection and disassembly station; finally, the primary air claw 2b4 drives the primary joint assembly 2b6 to clamp the output busbar on the transformer to complete the primary wiring .

One-time disassembly process: after the verification is completed, firstly, the primary air gripper 2b4 drives the primary joint assembly 2b6 to loosen the output busbar on the transformer; then, the transmission device 3 transfers the verified transformer tray 5 Back; finally, the primary electric cylinder 2b1 drives the primary crossbeam 2b3 to move upward, thereby driving the primary joint assembly 2b6 on the primary air gripper 2b4 to move upward to the initial position to complete a stitch removal.

The secondary wiring assembly 2c includes a secondary electric cylinder 2c1, a secondary positioning guide plate 2c2, a secondary beam 2c3 and a secondary pressing pin assembly 2c4, and the secondary pressing pin assembly 2c4 is installed on the secondary beam 2c3 lower end, the upper end of the secondary beam 2c3 is connected to the telescopic end of the secondary electric cylinder 2c1, and the cylinder part of the secondary electric cylinder 2c1 is installed on the mounting frame 2a through the secondary positioning guide plate 2c2 superior. A plurality of the secondary press needle assemblies 2c4 share one electric cylinder through the secondary beam 2c3, further reducing the number of electric cylinders, further reducing the cost and having a compact structure and a small volume.

As shown in Figure 17, the specific action process of the secondary wiring assembly 2c is as follows (see Figure 15, Figure 16 and Figure 27):

Secondary wiring process: after the transformer is moved in place, the secondary electric cylinder 2c1 drives the secondary beam 2c3 to move downward, thereby driving the secondary pressing pin assembly 2c4 to press against the secondary terminal of the transformer, completing Secondary wiring.

Secondary stitch removal process: After the verification is completed, the secondary electric cylinder 2c1 drives the secondary beam 2c3 to move upward, thereby driving the secondary pressing needle assembly 2c4 to move upward to the initial position, and completes the second stitch removal.

The core assembly 2d includes a track 2d1 laid on the test bench 1, a slide bar 2d2 slidably installed on the track 2d1, a slide bar motor 2d3 that drives the slide bar 2d2 to slide on the track 2d1 , a through-rod carriage 2d4 evenly arranged longitudinally along the track 2d1 and a through-rod 2d5 slidably mounted on the through-rod carriage 2d4, and one end of the through-rod 2d5 is connected to the slide rod 2d2. A plurality of through-hole rods 2d5 use the same motor through the slide rod 2d2, which reduces the number of motors, further reduces the cost, and has a compact structure and a small volume. In this embodiment, the number of the piercing rods 2d5 is three, and the sliding rod motor 2d3 is installed on the test bench 1 corresponding to the position below the central piercing rod 2d5.

As shown in Figure 1, the specific action process of the threading assembly 2d is as follows (see Figure 28):

After the transformer is moved in place, the sliding rod motor 2d3 drives the sliding rod 2d2 to move toward the transformer, thereby driving the piercing rod 2d5 to pass through the transformer to be tested to complete the piercing action; after the verification is completed, the The sliding rod motor 2d3 drives the sliding rod 2d2 back, so as to drive the through-core rod 2d5 back to the initial position.

The quantity of the primary beam 2b3 and the quantity of the secondary beam 2c3 are respectively consistent with the quantity of the through rod 2d5. By adopting the technical scheme of arranging a plurality of primary beams 2b3, secondary beams 2c3 and piercing rods 2d5, the verification line can simultaneously verify multiple rows of transformers, thereby improving the efficiency of the verification line. The quantity of the primary joint assembly 2b6 on the single primary beam 2b3 and the quantity of the secondary pressing needle assembly 2c4 on the single secondary beam 2c3 are matched with each other, and there is at least one set. By respectively setting a plurality of supporting primary joint assemblies 2b6 and a plurality of secondary pressing pin assemblies 2c4 on the single described primary beam 2b3 and the single described secondary beam 2c3, like this, each row of this verification line can simultaneously Verification of multiple transformers further improves the efficiency of this verification line.

The position corresponding to the piercing end of the piercing assembly 2d on the test bench 1 is provided with a first piercing rod support assembly 2e for supporting the piercing rod 2d5, and the first piercing rod support assembly 2e includes a support bracket 2e1 and a supporting air gripper 2e2, the supporting air gripper 2e2 is installed on the test bench 1 at a position corresponding to the through-center end of the through-core assembly 2d through the support bracket 2e1. The side of the installation frame 2a opposite to the test bench 1 is provided with a support platform 4, and the support platform 4 is provided with a second piercing rod support assembly 2f for supporting the piercing rod 2d5. The two through-hole rod support assemblies 2f include a supporting frame 2f1 and a supporting cylinder 2f2 that cooperate with each other. directly installed in the support frame 2f1. The support platform 4 and the test platform 1 are respectively arranged on both sides of the mounting frame 2a, and the support platform 4 and the test platform 1 are of an integral structure, which further reduces the volume of the test line .

The addition of the first through-rod support assembly 2e and the second through-rod support assembly 2f can effectively prevent bending deformation of the through-rod 2d5.

As shown in Fig. 28, the specific action process of the first piercing rod support assembly 2e and the second piercing rod support assembly 2f is as follows (see Fig. 1, Fig. 2, Fig. 5 and Fig. 6):

After the core-through component 2d completes the core-through action, the support air claw 2e2 and the support cylinder 2f2 act separately to clamp the two ends of the core-through rod 2d5 respectively; when the verification is completed, the support air claw 2e2 and supporting cylinder 2f2 first release the through-hole rod 2d5, and then the through-hole assembly 2d completes the retraction action.

The liftable positioning support platform assembly 3b2 includes a positioning base plate 3b2a, an electric positioning pin 3b2b vertically installed on the positioning base plate 3b2a, and a transformer tray supporting platform 3b2c installed on the telescopic end of the electric positioning pin 3b2b. When the electric positioning pin 3b2b is in the retracted state, the transformer tray support platform 3b2c is located under the double-speed chain 3a2, and when the electric positioning pin 3b2b is in the extended state, the transformer tray support platform 3b2c is located at the Double speed chain 3a2 above. A sensor 3b4 for controlling the operation of the transport motor 3a3 is provided on the transformer tray supporting platform 3b2c.

The transformer tray 5 can be accurately moved onto the transformer tray supporting platform 3b2c through the added sensor 3b4. The sensor 3b4 is a proximity switch, and the proximity switch is installed on the transformer tray support platform 3b2c through a stop plate 3b5.

As shown in Figure 18, the specific action process of the transmission device 3 is as follows (see Figure 19, Figure 20, Figure 21, Figure 22 and Figure 23):

First, the double-speed chain transmission mechanism 3a transports the transformer tray 5 to be inspected from the previous station (such as a warehouse, etc.) to the connection and disassembly station. When the transformer tray 5 to be inspected touches When the proximity switch on the stop plate 3b5 is stopped, the double-speed chain transmission mechanism 3a stops, and at this time, the transformer tray 5 to be checked is located directly above the liftable positioning support platform assembly 3b2; then, The electric positioning pin 3b2b is stretched out, and the transformer tray 5 to be checked is pushed upward until the transformer tray 5 to be checked is disengaged from the double-speed chain transmission mechanism 3a; then, the positioning motor 3b3 Accurately move the transformer tray 5 to be inspected from the initial station to the inspection station of the odd-numbered transformers, and this inspection line will perform a test on the odd-numbered transformers on the transformer tray 5 to be inspected. Verification and marking: after the verification and marking of the odd-numbered row of transformers is completed, the positioning motor 3b3 will accurately move the verified odd-numbered transformer tray 5 from the odd-numbered row transformer verification station to the even-numbered row Transformer verification station, this verification line will verify and mark the even-numbered transformers on the transformer tray 5; after all the transformers on the transformer tray 5 have been verified and marked, the positioning motor 3b3 Accurately return the transformer tray 5 after the verification to the initial position; then, retract the electric positioning pin 3b2b, so that the transformer tray 5 after the verification is moved downward until the verification is completed The final transformer tray 5 falls on the double-speed chain transmission mechanism 3a; finally, the double-speed chain transmission mechanism 3a returns the verified transformer tray 5 to the upper step station.

The workflow of this verification line is as follows:

1. For the busbar type transformer, the verification experiment only needs to be connected and disconnected once and connected and disconnected twice. The specific process is:

First, the double-speed chain transmission mechanism 3a transports the transformer tray 5 to be inspected from the previous station (such as a warehouse, etc.) to the connection and disassembly station. When the transformer tray 5 to be inspected touches When the proximity switch on the stop plate 3b5 is stopped, the double-speed chain transmission mechanism 3a stops, and at this time, the transformer tray 5 to be checked is located directly above the liftable positioning support platform assembly 3b2; then, The electric positioning pin 3b2b is stretched out, and the transformer tray 5 to be checked is pushed upward until the transformer tray 5 to be checked is disengaged from the double-speed chain transmission mechanism 3a; then, the positioning motor 3b3 Accurately move the transformer tray 5 to be inspected from the initial station to the odd-numbered transformer inspection station; then, the primary wiring assembly 2b and the secondary wiring assembly 2c The odd-numbered row transformers on the transformer tray 5 to be inspected are respectively subjected to primary wiring and secondary wiring; Secondary winding turn-to-turn insulation strength test, magnetic saturation margin measurement and basic error measurement, and mark qualified products and unqualified products respectively; after verification, the primary wiring assembly 2b and the secondary wiring assembly 2c are The odd-numbered row transformers are respectively subjected to a first-time disassembly and a second disassembly; after the disassembly is completed, the positioning motor 3b3 moves the verified odd-numbered transformer trays 5 from the odd-numbered row transformer verification station to accurately Move to the transformer verification station of the even row; then, the primary wiring assembly 2b and the secondary wiring assembly 2c perform primary wiring and secondary wiring of the even row transformers on the transformer tray 5 respectively. Wiring; After the wiring is completed, this verification line can respectively perform insulation resistance measurement, power frequency withstand voltage test, secondary winding turn-to-turn insulation strength test, magnetic saturation margin measurement and basic error measurement on the even-numbered row transformers, and Mark qualified products and unqualified products respectively; after all the transformers on the transformer tray 5 have been verified and marked, the positioning motor 3b3 will accurately return the verified transformer tray 5 to the initial station Then, the electric positioning pin 3b2b is retracted, so that the transformer tray 5 after the verification is completed moves downward until the transformer tray 5 after the verification is completed falls on the double-speed chain transmission mechanism 3a; Finally, the double-speed chain transmission mechanism 3a returns the transformer tray 5 after the verification to the upper station.

2. For the core-through transformer, the verification experiment only needs to be connected and disconnected twice and through the core. The specific process is as follows:

First, the double-speed chain transmission mechanism 3a transports the transformer tray 5 to be inspected from the previous station (such as a warehouse, etc.) to the connection and disassembly station. When the transformer tray 5 to be inspected touches When the proximity switch on the stop plate 3b5 is stopped, the double-speed chain transmission mechanism 3a stops, and at this time, the transformer tray 5 to be checked is located directly above the liftable positioning support platform assembly 3b2; then, The electric positioning pin 3b2b is stretched out, and the transformer tray 5 to be checked is pushed upward until the transformer tray 5 to be checked is disengaged from the double-speed chain transmission mechanism 3a; then, the positioning motor 3b3 Accurately move the transformer tray 5 to be inspected from the initial station to the inspection station of the odd-numbered transformer transformer; The odd-numbered rows of transformers above are connected for the second time; after the wiring is completed, the thread-through component 2d will pass through the odd-numbered rows of transformers; The odd-numbered row transformers on the transformer tray 5 are respectively subjected to insulation resistance measurement, power frequency withstand voltage test, secondary winding turn-to-turn dielectric strength test, magnetic saturation margin measurement and basic error measurement, and qualified products and unqualified products are marked separately come out; after the verification is completed, the secondary wiring assembly 2c and the through-core assembly 2d perform secondary unwiring and retracting actions on the odd-numbered transformers respectively; after unwiring and returning are completed, the positioning motor 3b3 will The transformer trays 5 of the odd-numbered rows are accurately moved from the odd-numbered transformer inspection station to the even-numbered transformer inspection station after the verification is completed; then, the secondary wiring assembly 2c performs the inspection of the transformer The secondary wiring of the even-numbered row transformers on the tray 5; after the wiring is completed, the thread-through component 2d will pass through the even-numbered row transformers; Insulation resistance measurement, power frequency withstand voltage test, secondary winding turn-to-turn insulation strength test, magnetic saturation margin measurement and basic error measurement are respectively carried out on the transformer, and qualified products and unqualified products are marked respectively; the transformer tray 5 After the verification and marking of all the transformers on the board are completed, the positioning motor 3b3 will accurately return the transformer tray 5 after the verification to the initial station; then, the electric positioning pin 3b2b retracts to make the verification The completed transformer tray 5 moves downward until the verified transformer tray 5 falls on the double-speed chain transmission mechanism 3a; finally, the double-speed chain transmission mechanism 3a transfers the verified mutual inductor The device tray 5 is returned to the described last step station to get final product.

This test line solves the problems in the prior art by adopting the technical solution of installing the primary wiring assembly 2b and the secondary wiring assembly 2c on the same mounting frame 2a, and installing the through-core assembly 2d on the test bench 1. The problem of large floor area caused by the need to configure two test benches; when this verification line is used for insulation resistance measurement, power frequency withstand voltage test, secondary winding inter-turn insulation strength test, magnetic saturation margin measurement and basic error measurement, It only needs to be connected and disconnected once, and the process is simple; by adopting the technical scheme of setting the transformer tray positioning mechanism 3b in odd rows and even rows of transformer verification stations, the verification line is increased once. The number of transformers that can be verified, thereby improving the efficiency of the verification line; the two joint assemblies 2b6 are connected through the double-ended pressing rod 2b5, so that two pairs of the joint assemblies can be installed on one air gripper 2b4 2b6, that is, a transformer can be pressed between two adjacent air claws 2b4, thereby reducing the number of air claws 2b4 and reducing the cost, and multiple air claws 2b4 share one electric cylinder through the primary beam 2b3, Reducing the number of electric cylinders further reduces the cost and is compact in structure and small in size; multiple secondary press needle assemblies 2c4 share one electric cylinder through the secondary crossbeam 2c3, further reducing the number of electric cylinders and further reducing the number of electric cylinders. The cost is reduced, the structure is compact, and the volume is small; multiple through-hole rods 2d5 use the same motor through the slide rod 2d2, which reduces the number of motors, further reduces the cost, and has a compact structure and small volume; by adopting matching settings The technical scheme of a plurality of said primary beams 2b3, secondary beams 2c3 and through-core rods 2d5 enables this verification line to simultaneously verify multiple rows of transformers, thereby improving the efficiency of this verification line; 2b3 and the single secondary beam 2c3 are respectively provided with a plurality of supporting primary joint assemblies 2b6 and a plurality of secondary pressing needle assemblies 2c4, so that each row of the verification line can simultaneously verify a plurality of transformers, and further The efficiency of this test line is improved. Through the additional sensor 3b4, the transformer tray can be accurately moved onto the transformer tray support platform 3b2c; by designing the positioning motor 3b3 as a servo motor, the servo motor can accurately control the liftable Locate the moving position of the support platform assembly 3b2, so that the odd-numbered transformers and even-numbered transformers on the transformer tray 5 can be accurately controlled to move to the connecting and dismantling stations in turn, thereby increasing the calibration line once. The number of transformers that can be verified has greatly improved the efficiency of this verification line.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. A low-voltage current transformer verification device, comprising: a test bench (1) and an automatic connection and disconnection device (2), characterized in that the automatic connection and disconnection device (2) includes a mounting frame (2a), a primary Wiring assembly (2b), secondary wiring assembly (2c) and feedthrough assembly (2d), the feedthrough assembly (2d) is installed on the test bench (1), and the mounting frame (2a) is arranged on the The side of the test bench (1) corresponds to the position of the through-core end of the core-through assembly (2d), and the primary wiring assembly (2b) and the secondary wiring assembly (2c) are respectively installed on the mounting frame (2a) in cooperation with each other. )superior. 2. The low-voltage current transformer verification device according to claim 1, characterized in that, the primary wiring assembly (2b) includes a primary electric cylinder (2b1), a primary positioning guide plate (2b2), a primary beam (2b3), a primary Air claw (2b4), double-ended compression rod (2b5) and primary joint assembly (2b6), the primary joint assembly (2b6) is installed at one or both ends of the double-ended compression rod (2b5), The two double-ended pressing rods (2b5) are respectively installed on the two movable ends of the same primary air claw (2b4), and the primary air claw (2b4) is installed on the lower end of the primary beam (2b3). The upper end of the primary beam (2b3) is connected to the telescopic end of the primary electric cylinder (2b1), and the cylinder part of the primary electric cylinder (2b1) is installed on the mounting frame (2a) through the primary positioning guide plate (2b2) )superior; The secondary wiring assembly (2c) includes a secondary electric cylinder (2c1), a secondary positioning guide plate (2c2), a secondary beam (2c3) and a secondary pressing pin assembly (2c4), and the secondary pressing pin The assembly (2c4) is installed at the lower end of the secondary beam (2c3), and the upper end of the secondary beam (2c3) is connected to the telescopic end of the secondary electric cylinder (2c1), and the secondary electric cylinder (2c1) The cylinder part of the cylinder is installed on the mounting frame (2a) through the secondary positioning guide plate (2c2); The through-core assembly (2d) includes a track (2d1) laid on the test bench (1), a slide bar (2d2) slidingly installed on the track (2d1), driving the slide bar (2d2) The sliding rod motor (2d3) sliding on the rail (2d1), the through rod carriage (2d4) arranged longitudinally along the rail (2d1), and the through rod carriage (2d4) slidably installed on the through rod carriage (2d4) The through-core rod (2d5), one end of the through-center rod (2d5) is connected with the slide rod (2d2). 3. The low-voltage current transformer verification device according to claim 2, characterized in that the number of the primary beam (2b3) and the number of the secondary beam (2c3) are respectively the same as the number of the through-hole rod (2d5) The quantity is consistent. 4. The low-voltage current transformer verification device according to claim 3, characterized in that the number of primary joint assemblies (2b6) on the single primary beam (2b3) and the number of single secondary beams (2c3) The quantity of the secondary pressing needle assembly (2c4) is matched with each other, and there is at least one set. 5. The low-voltage current transformer verification device according to claim 2, characterized in that, the position corresponding to the through-hole end of the through-through component (2d) on the test bench (1) is provided with a support for the through-through rod ( 2d5) the first piercing rod support assembly (2e), the first piercing rod support assembly (2e) includes a support bracket (2e1) and a support air claw (2e2), and the support air claw (2e2) passes through the The supporting bracket (2e1) is installed on the test bench (1) at a position corresponding to the through-hole end of the through-hole component (2d). 6. The low-voltage current transformer verification device according to claim 5, characterized in that, a supporting platform (4) is provided on the side of the mounting frame (2a) opposite to the testing platform (1), and the supporting platform (4) is provided with a second piercing rod support assembly (2f) for supporting the piercing rod (2d5), and the second piercing rod support assembly (2f) includes a supporting frame (2f1) and Support the cylinder (2f2), the support frame (2f1) is installed on the support table (4) at the position corresponding to the through-hole end of the through-core assembly (2d), the support cylinder (2f2) is vertically installed on the Inside the support frame (2f1). 7. The low-voltage current transformer verification device according to claim 6, characterized in that, the support platform (4) and the test platform (1) are respectively arranged on both sides of the installation frame (2a), and the The support platform (4) and the test platform (1) are integral structures.

Images