Performance testing device for current transformer production

Abstract

The invention discloses a performance testing device for current transformer production, and belongs to the technical field of testing equipment, the performance testing device comprises a conveying belt, a lifting mechanism, a protection mechanism and an ejector pin, a current transformer body is placed on the top of the conveying belt, the protection mechanism is arranged on one side of the conveying belt, and the protection mechanism is used for positioning the current transformer body; the device has the beneficial effects that through accurate mechanical linkage and pneumatic control, automatic insertion and retraction of the pins are achieved, meanwhile, corrosion of the external environment to the pins is effectively isolated, and under the action of elastic restoring force of a third spring, the pins quickly retract into the sliding shell, so that contact between the pins and external air is effectively isolated, and the service life of the pins is prolonged. According to the testing device, corrosion of external water vapor and dust is avoided, the cleanliness of the pins and the testing accuracy are ensured, through the design of integration of automation and protection, the testing efficiency is improved, the service life of the pins is prolonged, and long-term stable operation of a testing system is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of test equipment, and particularly relates to a performance test device for the production of current transformers. Background Art

[0002] The performance test device for the production of current transformers is mainly used to comprehensively detect and evaluate the various performance indicators of current transformers during the production process to ensure that they meet quality standards and safety requirements.

[0003] After retrieval, the patent with the Chinese patent publication number CN117110970B discloses a performance test device and method for the production of current transformers. This device automatically contacts and separates the power connection contacts and test needles with the terminals of the voltage and current transformers, eliminating the need for manual plugging and unplugging of the power supply, thus avoiding electric shock to workers. And during the rotation process of multiple groups of electric contacts and test needles, the voltage and current transformers are tested, so that a large number of voltage and current transformers can be tested alternately, improving the test efficiency while reducing the labor cost. However, the pins of the existing device are exposed externally, which may lead to performance degradation of the pins due to oxidation, corrosion, etc., shortening the service life of the device; After retrieval, the patent with the Chinese patent publication number CN119199698B discloses a performance test device for the production of current transformers. This device uses a positioning and adjusting mechanism and an anti-jamming intermittent dropping mechanism. By simply putting multiple current sensors into the feeding cavity at the same time, the automatic test of the current sensors can be realized, eliminating the process of manually placing the current sensors and aligning their pins with the detection probes, which is more convenient and improves the test efficiency. However, the test pins of this device are single, and different pins need to be replaced when testing current transformers of different models, resulting in troublesome replacement. Summary of the Invention

[0004] One of the purposes of this application is to provide a performance test device for the production of current transformers to solve the problems that the pins of the existing device are exposed externally, which may cause the pins to be oxidized and corroded, and different pins need to be replaced when testing current transformers of different models, resulting in troublesome replacement.

[0005] To achieve the above object, the technical solution adopted in this application is as follows: A performance testing device for the production of current transformers, comprising: a conveyor belt, a lifting mechanism, a protection mechanism, and a thimble. The current transformer body is placed on the top of the conveyor belt. A protection mechanism is arranged on one side of the conveyor belt, and the protection mechanism is used for positioning the current transformer body. A vertical plate is arranged on one side of the protection mechanism. A lifting mechanism is arranged at one side of the bottom of the vertical plate. A first cylinder is arranged on one side of the lifting mechanism. There are two first cylinders. The outer sleeves of the telescopic ends of the two first cylinders are provided with thimbles. The thimbles are electrically connected to an external detection terminal. A switching mechanism is arranged at one end of the bottom of the thimble. The switching mechanism is installed on one side of the lifting mechanism, and the switching mechanism is used for thimble switching work. There are two switching mechanisms. A third cylinder is embedded in one end of the bottom of the vertical plate. An installation plate is arranged on one side of the conveyor belt. The installation plate is connected to one side of the conveyor belt by screws. A second cylinder is embedded in the installation plate. There are two second cylinders. The outer ends of the telescopic ends of the two second cylinders are connected to a push plate by screws.

[0006] Preferably, the lifting mechanism includes a lifting frame. There is a hole groove on one side of the lifting frame, and the outer wall of the sliding rod is in sliding contact with the inside of the hole groove. One end of the bottom and the top of the sliding rod are welded to the vertical plate. One end of the bottom of the vertical plate is rotatably connected to one end of the bottom of the first threaded rod. One end of the top of the first threaded rod is welded to the turntable. The outer wall of the first threaded rod is threadedly connected to the lifting frame. The other end of the lifting frame is welded to the outer wall of the first cylinder. Through the cooperation of the lifting frame, the sliding rod, the first threaded rod, and the turntable, the up and down movement function of the pin is realized; by rotating the turntable, the first threaded rod can be driven to rotate, so that the lifting frame threadedly connected thereto moves up and down along the sliding rod, thereby driving the pin to adjust the height to adapt to current transformer bodies of different heights; this design not only improves the flexibility and adjustability of the device, but also ensures that the pin can accurately insert into the hole groove of the current transformer body for testing, improving the accuracy and reliability of the test.

[0007] Preferably, the protection mechanism includes an adjustment structure and a buffer mechanism. The buffer mechanism is located below the switching mechanism, and the adjustment mechanism is located on both sides of the protection mechanism. The adjustment mechanism is used for the adjustment work of the protection mechanism. The buffer mechanism is installed on the bottom surface of the vertical plate, and the top surface of the buffer mechanism is flush with the surface of the conveyor belt. By setting the adjustment structure and the buffer mechanism, the protection mechanism realizes the positioning and protection functions of the current transformer body; the buffer mechanism can support and buffer the current transformer body, avoiding damage to the current transformer body or bending of the pins due to excessive pressure when the pins are inserted; the adjustment mechanism can adjust the protection mechanism to adapt to current transformer bodies of different sizes and models, enhancing the versatility and applicability of the device; this design not only improves the safety and reliability of the testing process, but also extends the service life of the equipment and improves the testing efficiency at the same time.

[0008] Preferably, the buffer mechanism includes a bracket. The bracket is in a U-shaped structure. The two sides of the inner wall of the bracket are in sliding contact with the two sides of the current transformer body. There are protruding ear plates on both sides of the bracket, and circular holes are opened at the ends of the ear plates. The inner wall of the circular hole is in sliding contact with the outer wall of the second threaded rod. The bottom end of the second threaded rod is welded to the bottom end of the vertical plate, and a ring-shaped protruding structure is arranged on the outer wall of the top end of the second threaded rod. A first spring is sleeved on the outer wall of the top end of the second threaded rod. The bracket is in a U-shaped structure and can closely fit the two sides of the current transformer body, providing stable support and positioning. When the pins are inserted into the current transformer body, the bracket can effectively buffer the pressure exerted by the pins, avoiding damage to the current transformer body due to excessive force, thus improving the safety and reliability of the testing process. The bracket is connected to the vertical plate through the second threaded rod and provides elastic support through the first spring; when the pins are inserted into the current transformer body, the current transformer body exerts a downward pressure on the bracket, and the bracket will compress the first spring, thereby realizing buffering; this elastic buffering mechanism can effectively reduce the impact force when the pins are inserted and protect the pins and the current transformer body from damage.

[0009] Preferably, the adjustment mechanism includes a knob. The knob is sleeved outside the second threaded rod, and the outer wall of the second threaded rod is threadedly connected to the inner wall of the knob. The knob is located at the bottom end of the spring. There are four second threaded rods, and the four second threaded rods are respectively arranged at the four ends of the bracket. Through the threaded cooperation between the knob and the second threaded rod, the adjustment mechanism realizes the adjustment function of the buffer mechanism, can flexibly adjust the position and pressure of the bracket according to the size of the current transformer body and the testing requirements, thereby ensuring that the current transformer can be stably supported and protected during the testing process, and at the same time improving the adaptability and versatility of the device, enabling it to better meet the testing requirements of different models of current transformers.

[0010] Preferably, the switching mechanism includes a top plate. A connecting column is provided at the bottom of the top plate. One end of the top of the connecting column is welded to the top plate, and one end of the bottom of the connecting column is welded to the top of the adjusting block. A sliding shell is arranged between the top plate and the adjusting block. The top and bottom of the sliding shell are in sliding contact with the top plate and the adjusting block respectively. A plurality of pins with different diameters are arranged inside the sliding shell. The pins are in sliding contact with the inside of the adjusting block. One end of the top of the pin is welded with a limiting block. A third spring is sleeved outside the pin. Through the cooperation of structures such as the top plate, the connecting column, the adjusting block, the sliding shell and the pins with different diameters, the switching function of the pins is realized; by rotating the adjusting block, the pins with different diameters inside the sliding shell can be switched to align with the top pin, so as to meet the test requirements of current transformers of different models, without frequently replacing the pins, greatly improving the test efficiency and the versatility of the device. At the same time, the third spring outside the pin can retract the pin into the sliding shell after the test is completed, preventing the pin from being exposed to oxidation or corrosion and prolonging the service life of the pin.

[0011] Preferably, a hole groove is formed at the top of the top plate, and the hole grooves at the top of the top plate are distributed in an annular and equally spaced manner. The hole grooves at the top of the top plate are in sliding contact with the outer wall of the top pin. One end of the bottom of the top pin is in close fit with the top of the limiting block. A circular convex structure is arranged at the top of the limiting block. The circular convex structure at the top of the limiting block is embedded inside the hole groove at the top of the top plate. Through the sliding cooperation between the annular and equally spaced hole grooves at the top of the top plate and the top pin, and the embedding relationship between the limiting block and the hole groove of the top plate, it is ensured that the top pin can accurately align with the pins with different diameters and push them for testing, not only improving the stability and reliability of the pin switching, but also further enhancing the positioning accuracy of the pin during the switching process through the circular convex structure of the limiting block, avoiding test errors caused by position deviation, and thus improving the performance and accuracy of the entire test device.

[0012] Preferably, there are two adjusting blocks. The outer walls of the two adjusting blocks are distributed with teeth, and the outer walls of the two adjusting blocks are meshed with each other through the teeth. The inner walls of the adjusting blocks are distributed with teeth, and the teeth on the inner walls of the adjusting blocks are distributed in an annular and equally spaced manner. The teeth on the inner walls of the adjusting blocks are meshed with the bottom of the tooth ring. The bottom of the tooth ring is distributed with teeth. A second spring is arranged above the tooth ring, and the second spring is sleeved outside the sliding shell. The outer side of the top of the sliding shell is connected to the lifting frame through bolts. Through the meshing of the outer teeth of the two adjusting blocks with each other and with the inner teeth of the tooth ring, the synchronous movement and precise positioning during the pin switching are realized. When it is necessary to switch the pins, apply a certain torque to disengage the tooth ring from the clamping of the adjusting block. The adjusting block can drive the pin to rotate, so as to switch different types of pins to align with the top pin. After the switching is completed, the second spring pushes the tooth ring to mesh with the adjusting block again to fix the position of the adjusting block and ensure the stability of the pin during the test. In addition, the sliding shell and the lifting frame are connected by bolts, which ensures the structural stability of the entire switching mechanism, enables the pin to maintain an accurate position during the lifting process, and improves the reliability and applicability of the testing device.

[0013] Preferably, grooves are formed on the outer wall of the sliding shell. The grooves on the outer wall of the sliding shell are distributed in an annular and equally spaced manner. The outer wall of the sliding shell is in sliding contact with the inner wall of the tooth ring. The inner wall of the tooth ring is provided with a convex structure, and the convex structures on the inner wall of the tooth ring are distributed in an annular and equally spaced manner. The grooves on the outer wall of the sliding shell and the convex structures on the inner wall of the tooth ring cooperate with each other, which can ensure the smooth sliding of the tooth ring on the outer wall of the sliding shell and maintain an accurate relative position relationship at the same time; it improves the stability and reliability of the switching mechanism during operation and avoids test errors caused by loosening or misalignment between components.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: (1) Through precise mechanical linkage and pneumatic control, the device realizes the automatic insertion and retraction of the pins, while effectively isolating the pins from the erosion of the external environment. Specifically, the current transformer body is accurately conveyed to the top of the bracket through the conveyor belt, and under the action of the positioning device of the bracket, the test hole slot inside it is accurately aligned with the position of the subsequent test pins. At this time, the first cylinder is in a contracted state, the ejector rod is at a high position, the ejector pin is in a standby position, and the pin is completely enclosed inside the sliding shell, with the third spring providing the initial elastic support. At the start of the test, the first cylinder is controlled to extend, pushing the ejector rod downward through the hole slot on the surface of the top plate, and then driving the ejector pin to move downward. After the ejector pin passes through the bottom of the adjusting block, it accurately pushes the pin downward, enabling it to penetrate into the test hole slot inside the current transformer body to complete the insertion action of the test pin. After the pin is inserted into the current transformer body, the test system starts to detect various parameters of the current transformer. After the detection is completed, the first cylinder is controlled to contract, driving the ejector rod to move upward. At this time, under the elastic restoring force of the third spring, the pin quickly retracts into the sliding shell. The structural design of the sliding shell ensures that the pin can be completely enclosed inside it, effectively isolating the contact between the pin and the external air, avoiding the erosion of external moisture and dust, ensuring the cleanliness of the pin and the accuracy of the test. Through this integrated design of automation and protection, the test device not only improves the test efficiency but also extends the service life of the pin, ensuring the long-term stable operation of the test system.

[0015] (2) Multiple types of pins are set inside the sliding shell to adapt to the apertures of current transformers with different specifications. By rotating the adjusting block, when a certain torque is applied, the gear ring will disengage from the engaging state with the adjusting block, allowing the gear ring to move upward. During this process, the adjusting blocks are meshed with each other through the ratchets to achieve synchronous rotation. As the adjusting block rotates, the pins inside the sliding shell will also rotate accordingly, thus switching to different types of pins aligned with the ejector rod. When the adjusting block rotates to the appropriate position, the second spring will push the gear ring downward, making it engage with the ratchets on the inner side of the adjusting block again, thereby fixing the position of the adjusting block. At this time, the ejector rod can push different types of pins downward to be ejected to adapt to the apertures of current transformers with different types. This design greatly improves the applicability of the device, enabling it to flexibly meet the test requirements of current transformers with various specifications.

[0016] (3) By rotating the turntable, the turntable can drive the first threaded rod connected thereto to rotate. Since the first threaded rod is in threaded engagement with the lifting frame, the rotation of the first threaded rod will drive the lifting frame to move up and down along its axis. The up and down movement of the lifting frame further drives the pin to move up and down correspondingly, thereby realizing the adjustment of the pin height to adapt to current transformer bodies of different heights. When the pin is inserted downward into the current transformer body, if the pressure of the pin is too large, the current transformer body will press down on the bracket, and the bracket will further press down on the first spring. The elastic action of the first spring can provide elastic support for the bracket, thereby buffering the pressure of the pin and preventing the pin from bending and deforming due to excessive pressure, ensuring the service life of the pin and the reliability of the test. In addition, by rotating the knob, the knob can rotate outside the second threaded rod, and the rotation of the knob will cause it to move along the axis of the second threaded rod, thereby squeezing the first spring. In this way, the compression degree of the first spring can be adjusted, thereby changing the pressure of the pin. This design can not only effectively adjust the pressure of the pin, but also be flexibly adjusted according to different test requirements and the specifications of the current transformer, greatly improving the adjustability and applicability of the device.

[0017] Thus, the problem that the pins of the existing device are exposed outside, which may cause the pins to be oxidized, corroded, and when testing current transformers of different models, different pins need to be replaced, resulting in troublesome replacement, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic side view structure diagram of the present invention.

[0020] Figure 3 It is a schematic top view structure diagram of the present invention.

[0021] Figure 4 It is a schematic front view structure diagram of the present invention.

[0022] Figure 5 It is a schematic diagram of the thimble structure of the present invention.

[0023] Figure 6 It is a schematic diagram of the switching mechanism structure of the present invention.

[0024] Figure 7 It is a schematic diagram of the internal structure of the switching mechanism of the present invention.

[0025] Figure 8 It is a schematic diagram of the adjusting block structure of the present invention.

[0026] Figure 9 It is a schematic diagram of the gear ring structure of the present invention.

[0027] In the figure: 1, conveyor belt; 2, current transformer body; 3, vertical plate; 4, lifting mechanism; 401, lifting frame; 402, sliding rod; 403, first threaded rod; 404, turntable; 5, first cylinder; 6, switching mechanism; 601, top plate; 602, adjusting block; 603, toothed ring; 604, sliding housing; 605, second spring; 606, connecting column; 607, pin; 608, limiting block; 609, third spring; 7, mounting plate; 8, second cylinder; 9, protection mechanism; 901, bracket; 902, second threaded rod; 903, first spring; 904, knob; 10, push plate; 11, third cylinder; 12, ejector pin. Detailed implementation mode

[0028] Next, in combination with the detailed implementation mode, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0029] In the description of the present application, it should be noted that for the orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0031] Embodiment 1: One of the preferred embodiments of the present application is as Figures 1 to 9As shown in the figure, a performance testing device for the production of current transformers includes: a conveyor belt 1, a lifting mechanism 4, a protection mechanism 9, and a thimble 12. The current transformer body 2 is placed on the top of the conveyor belt 1. A protection mechanism 9 is arranged on one side of the conveyor belt 1. The protection mechanism 9 is used for the positioning work of the current transformer body 2. A vertical plate 3 is arranged on one side of the protection mechanism 9. A lifting mechanism 4 is arranged on one side of the bottom of the vertical plate 3. A first cylinder 5 is arranged on one side of the lifting mechanism 4. There are two first cylinders 5. The outer sleeves of the telescopic ends of the two first cylinders 5 are provided with thimbles 12. The thimbles 12 are electrically connected to an external detection terminal. One end of the bottom of the thimble 12 is provided with a switching mechanism 6. The switching mechanism 6 is installed on one side of the lifting mechanism 4. The switching mechanism 6 is used for the switching work of the thimble 12. There are two switching mechanisms 6. A third cylinder 11 is embedded in one end of the bottom of the vertical plate 3. An installation plate 7 is arranged on one side of the conveyor belt 1. The installation plate 7 is connected to one side of the conveyor belt 1 by screws. A second cylinder 8 is embedded in the installation plate 7. There are two second cylinders 8. The outer sleeves of the telescopic ends of the two second cylinders 8 are connected to a push plate 10 by screws. The switching mechanism 6 includes a top plate 601. A connecting column 606 is arranged at the bottom of the top plate 601. One end of the top of the connecting column 606 is welded to the top plate 601. One end of the bottom of the connecting column 606 is welded to the top of the adjusting block 602. A sliding shell 604 is arranged between the top plate 601 and the adjusting block 602. The top and bottom of the sliding shell 604 are in sliding contact with the top plate 601 and the adjusting block 602 respectively. A variety of diameter pins 607 are arranged inside the sliding shell 604. The pins 607 are in sliding contact with the inside of the adjusting block 602. One end of the top of the pin 607 is welded with a limiting block 608. A third spring 609 is sleeved outside the pin 607; The current transformer body 2 on the top of the conveyor belt 1 is conveyed to the top of the bracket 901 through the second cylinder 8 and the push plate 10. Then, under the push of the first cylinder 5, the ejector rod can push the thimble 12 to move downward through the hole groove on the surface of the top plate 601. Then, the thimble 12 can pass through the bottom of the adjusting block 602 and push the pin 607 to move downward. Then, the pin 607 can be inserted into the hole groove inside the current transformer body 2 for testing. After the detection is completed, the third cylinder 11 pushes the current transformer body 2 back to the surface of the conveyor belt. The first cylinder 5 drives the ejector rod to contract. Then, under the action of the third spring 609, the pin 607 can retract into the sliding shell 604. Thus, it is beneficial to seal the pin 607 inside the sliding shell 604. Then, the air outside the pin 607 can be isolated. Then, the pin 607 can avoid being eroded by external water vapor and dust.

[0032] Embodiment 2: One of the preferred embodiments of the present application is as Figures 1 to 5As shown in the figure, a performance testing device for the production of current transformers. There are hole grooves on the top of the top plate 601, and the hole grooves on the top of the top plate 601 are distributed in an annular and equally spaced manner. The hole grooves on the top of the top plate 601 are in sliding contact with the outer wall of the thimble 12. One end of the bottom of the thimble 12 is in close contact with the top of the limit block 608. There is a circular convex structure on the top of the limit block 608, and the circular convex structure on the top of the limit block 608 is embedded inside the hole groove on the top of the top plate 601; There are two adjusting blocks 602. The outer walls of the two adjusting blocks 602 are distributed with teeth, and the outer walls of the two adjusting blocks 602 are meshed with each other through the teeth. The inner walls of the adjusting blocks 602 are distributed with teeth, and the teeth on the inner walls of the adjusting blocks 602 are distributed in an annular and equally spaced manner. The teeth on the inner walls of the adjusting blocks 602 are meshed with the bottom of the gear ring 603. There are teeth distributed at the bottom of the gear ring 603. A second spring 605 is arranged above the gear ring 603. The second spring 605 is sleeved outside the sliding shell 604. The outer side of the top of the sliding shell 604 is connected to the lifting frame 401 by bolts; There are grooves on the outer wall of the sliding shell 604, and the grooves on the outer wall of the sliding shell 604 are distributed in an annular and equally spaced manner. The outer wall of the sliding shell 604 is in sliding contact with the inner wall of the gear ring 603. There are convex structures on the inner wall of the gear ring 603, and the convex structures on the inner wall of the gear ring 603 are distributed in an annular and equally spaced manner; By arranging multiple types of pins 607 inside the sliding shell 604, and then by rotating the adjusting block 602, when a certain torque is applied to the adjusting block 602, the gear ring 603 will disengage from the clamping of the adjusting block 602, enabling the gear ring 603 to move upward. The adjusting blocks 602 drive each other to rotate synchronously through the teeth. While the adjusting block 602 rotates, it can drive the pins 607 inside the sliding shell 604 to rotate, thereby switching different internal pins 607 to align with the ejector rod. When the adjusting block 602 rotates to a suitable position, under the action of the second spring 605, the second spring 605 can push the gear ring 603 downward to engage with the teeth on the inner side of the adjusting block 602, fixing the position of the adjusting block 602, and then enabling the ejector rod to push different types of pins 607 downward, thereby switching different types of pins 607 to be suitable for the apertures of different types of current transformers, greatly improving the applicability of the device.

[0033] Example 3: One of the preferred embodiments of the present application, as Figures 1 to 7As shown in the figure, a performance testing device for the production of current transformers. The lifting mechanism 4 includes a lifting frame 401. There is a hole groove on one side of the lifting frame 401, and the outer wall of the sliding rod 402 is in sliding contact with the inner part of the hole groove. One end of the bottom and the top of the sliding rod 402 are welded to the vertical plate 3. One end of the bottom of the vertical plate 3 is rotatably connected to one end of the bottom of the first threaded rod 403. One end of the top of the first threaded rod 403 is welded to the turntable 404. The outer wall of the first threaded rod 403 is threadedly connected to the lifting frame 401. The other end of the lifting frame 401 is welded to the outer wall of the first cylinder 5. The protection mechanism 9 includes an adjustment structure and a buffer mechanism. The buffer mechanism is located below the switching mechanism 6. The adjustment mechanism is located on both sides of the protection mechanism 9. The adjustment mechanism is used for the adjustment work of the protection mechanism 9. The buffer mechanism is installed on the bottom surface of the vertical plate 3. The top surface of the buffer mechanism is flush with the surface of the conveyor belt 1. The buffer mechanism includes a bracket 901. The bracket 901 is in a U-shaped structure. The two sides of the inner wall of the bracket 901 are in sliding contact with the two sides of the current transformer body 2. There are protruding ear plates on both sides of the bracket 901, and circular hole grooves are opened at the ends of the ear plates. The inner wall of the circular hole groove is in sliding contact with the outer wall of the second threaded rod 902. One end of the bottom of the second threaded rod 902 is welded to one end of the bottom of the vertical plate 3. And there is an annular protruding structure on the outer wall of one end of the top of the second threaded rod 902. A first spring 903 is sleeved on the outer wall of one end of the top of the second threaded rod 902. The adjustment mechanism includes a knob 904. The knob 904 is sleeved outside the second threaded rod 902. The outer wall of the second threaded rod 902 is threadedly connected to the inner wall of the knob 904. The knob 904 is located at one end of the bottom of the spring. There are four second threaded rods 902. The four second threaded rods 902 are respectively arranged at the four ends of the bracket 901. By rotating the turntable 404, the turntable 404 can drive the first threaded rod 403 to rotate. While the first threaded rod 403 rotates, it can drive the lifting frame 401 to move up and down. Furthermore, the lifting frame 401 can drive the pin 607 to move up and down, so as to adapt to current transformers of different heights. When the pin 607 is inserted downward into the current transformer body 2, when the pressure of the pin 607 is too large, the current transformer body 2 will press down the bracket 901. Furthermore, the bracket 901 can press down the first spring 903. The first spring 903 can elastically support the bracket 901, which is beneficial to avoid the pin 607 from being bent due to excessive pressure. In addition, by rotating the knob 904, the knob 904 can rotate outside the second threaded rod 902. Furthermore, the knob 904 can squeeze the first spring 903, which is beneficial to adjust the pressure of the pin 607, thereby improving the adjustability of the device.

[0034] The basic principles, main features and advantages of the present application have been described above. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements will occur to the present application, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for the production of current transformers, characterized in that, Including: A conveyor belt (1), a lifting mechanism (4), a protection mechanism (9), and a thimble (12). A current transformer body (2) is placed on the top of the conveyor belt (1). A protection mechanism (9) is arranged on one side of the conveyor belt (1). The protection mechanism (9) is used for the positioning work of the current transformer body (2). A vertical plate (3) is arranged on one side of the protection mechanism (9). A lifting mechanism (4) is arranged at one side of the bottom of the vertical plate (3). A first cylinder (5) is arranged on one side of the lifting mechanism (4). There are two first cylinders (5). The outer sleeves of the telescopic ends of the two first cylinders (5) are sleeved with thimbles (12). The thimble (12) is electrically connected to an external detection terminal. A switching mechanism (6) is arranged at one end of the bottom of the thimble (12). The switching mechanism (6) is installed on one side of the lifting mechanism (4). The switching mechanism (6) is used for the switching work of the thimble (12). There are two switching mechanisms (6). A third cylinder (11) is embedded in the inner part of one end of the bottom of the vertical plate (3). An installation plate (7) is arranged on one side of the conveyor belt (1). The installation plate (7) is connected to one side of the conveyor belt (1) by screws. A second cylinder (8) is embedded in the installation plate (7). There are two second cylinders (8). The outer sleeves of the telescopic ends of the two second cylinders (8) are connected with a push plate (10) by screws.

2. The performance testing device for the production of current transformers according to claim 1, characterized in that: The lifting mechanism (4) includes a lifting frame (401). There is a hole groove on one side of the lifting frame (401). The outer wall of a slide bar (402) is in sliding contact with the inner part of the hole groove. One end of the bottom and the top of the slide bar (402) are welded to the vertical plate (3). One end of the bottom of the vertical plate (3) is rotatably connected to one end of the bottom of a first threaded rod (403). One end of the top of the first threaded rod (403) is welded to a turntable (404). The outer wall of the first threaded rod (403) is threadedly connected to the lifting frame (401). The other end of the lifting frame (401) is welded to the outer wall of the first cylinder (5).

3. A performance testing device for the production of current transformers according to claim 1, characterized in that: The protection mechanism (9) includes an adjustment structure and a buffer mechanism. The buffer mechanism is located below the switching mechanism (6). The adjustment mechanism is located on both sides of the protection mechanism (9). The adjustment mechanism is used for the adjustment work of the protection mechanism (9). The buffer mechanism is installed on the bottom surface of the vertical plate (3). The top surface of the buffer mechanism is flush with the surface of the conveyor belt (1).

4. The performance testing device for the production of current transformers according to claim 3, characterized in that: The buffer mechanism includes a bracket (901). The bracket (901) is in a U-shaped structure. The two sides of the inner wall of the bracket (901) are in sliding contact with the two sides of the current transformer body (2). There are protruding ear plates on both sides of the bracket (901). A circular hole groove is opened at the end of the ear plate. The inner wall of the circular hole groove is in sliding contact with the outer wall of a second threaded rod (902). One end of the bottom of the second threaded rod (902) is welded to one end of the bottom of the vertical plate (3). There is an annular protruding structure on the outer wall of one end of the top of the second threaded rod (902). A first spring (903) is sleeved on the outer wall of one end of the top of the second threaded rod (902).

5. The performance testing device for producing a current transformer according to claim 3, wherein: The adjusting mechanism includes a knob (904). The knob (904) is sleeved outside the second threaded rod (902). The outer wall of the second threaded rod (902) is threadedly connected to the inner wall of the knob (904). The knob (904) is located at one end of the bottom of the spring. There are four second threaded rods (902), and the four second threaded rods (902) are respectively arranged at the four ends of the bracket (901).

6. A performance testing device for the production of current transformers according to claim 1, characterized in that: The switching mechanism (6) includes a top plate (601). A connecting column (606) is arranged at the bottom of the top plate (601). One end of the top of the connecting column (606) is welded to the top plate (601), and one end of the bottom of the connecting column (606) is welded to the top of the adjusting block (602). A sliding shell (604) is arranged between the top plate (601) and the adjusting block (602). The top and bottom of the sliding shell (604) are respectively in sliding contact with the top plate (601) and the adjusting block (602). A variety of diameter pins (607) are arranged inside the sliding shell (604). The pins (607) are in sliding contact with the inside of the adjusting block (602). A limiting block (608) is welded to one end of the top of the pin (607). A third spring (609) is sleeved outside the pin (607).

7. The performance testing device for the production of current transformers according to claim 6, characterized in that: Hole grooves are formed at the top of the top plate (601), and the hole grooves at the top of the top plate (601) are distributed in an annular and equally spaced manner. The hole grooves at the top of the top plate (601) are in sliding contact with the outer wall of the top pin (12). One end of the bottom of the top pin (12) is in close fit with the top of the limiting block (608). A circular convex structure is arranged at the top of the limiting block (608), and the circular convex structure at the top of the limiting block (608) is embedded inside the hole groove at the top of the top plate (601).

8. The performance testing device for the production of current transformers according to claim 6, characterized in that: There are two adjusting blocks (602). The outer walls of the two adjusting blocks (602) are distributed with teeth, and the outer walls of the two adjusting blocks (602) are meshed with each other through the teeth. The inner walls of the adjusting blocks (602) are distributed with teeth. The teeth on the inner walls of the adjusting blocks (602) are distributed in an annular and equally spaced manner. The teeth on the inner walls of the adjusting blocks (602) are meshed with the bottom of the tooth ring (603). The bottom of the tooth ring (603) is distributed with teeth. A second spring (605) is arranged above the tooth ring (603). The second spring (605) is sleeved outside the sliding shell (604). The outer side of the top of the sliding shell (604) is connected to the lifting frame (401) through bolts.

9. The performance testing device for the production of current transformers according to claim 6, wherein: Grooves are formed on the outer wall of the sliding shell (604), and the grooves on the outer wall of the sliding shell (604) are distributed in an annular and equally spaced manner. The outer wall of the sliding shell (604) is in sliding contact with the inner wall of the tooth ring (603). A convex structure is arranged on the inner wall of the tooth ring (603), and the convex structures on the inner wall of the tooth ring (603) are distributed in an annular and equally spaced manner.

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