Ct polarity testing device

Abstract

The application relates to a CT polarity testing device which comprises a testing body, clamping plates and clamping assemblies. An interface terminal is arranged on the testing body and used for electrical connection with a wire; the clamping plates are connected with the testing body, the number of the clamping plates is at least two, and the at least two clamping plates are spaced and oppositely arranged on the outer periphery of the interface terminal; the number of the clamping assemblies is at least two, each clamping assembly is arranged through one clamping plate and is in sliding connection with the clamping plate, and each clamping assembly can be close to or away from the wire in a first direction; when the at least two clamping assemblies are close to the wire, the clamping assemblies can abut and clamp the outer periphery of the wire. When the CT polarity of the CT body is tested by the device, the wire at the interface terminal is not prone to left-right shaking and separation from the interface terminal, the possibility of separation of the wire from the interface terminal is low, the whole testing process is relatively safe, and the testing result is relatively accurate.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a CT polarity testing device. Background Technology

[0002] Currently in the power industry, when a CT (Cyclic Transformer) body is replaced or reassembled, a CT polarity test is required at the CT body to ensure that the actual polarity matches the specifications in its technical documents. When using a CT polarity testing device, the CT body under test needs to be connected to the interface terminals of the testing device via wires to complete the test. However, during the power-on testing process, the wires are prone to separating from the interface terminals, making the testing process dangerous and potentially leading to inaccurate results. Summary of the Invention

[0003] Therefore, it is necessary to provide a CT polarity testing device to address the problem that when testing is performed using a CT polarity testing device, the wires connecting the interface terminals of the testing device to the CT body being tested are prone to separation, which makes the testing process dangerous and the test results inaccurate.

[0004] A CT polarity testing device, comprising:

[0005] A test body, wherein the test body is provided with an interface terminal for electrical connection with a wire;

[0006] A snap-fit ​​plate, which is connected to the test body, wherein there are at least two snap-fit ​​plates, and the at least two snap-fit ​​plates are spaced apart and disposed opposite to each other on the outer periphery of the interface terminal;

[0007] The snap-fit ​​assembly has at least two snap-fit ​​assemblies, each snap-fit ​​assembly is inserted through a snap-fit ​​plate and slidably connected to the snap-fit ​​plate, and each snap-fit ​​assembly can move closer to or further away from the wire in a first direction; when at least two snap-fit ​​assemblies are close to the wire, the snap-fit ​​assembly can abut against and clamp the outer periphery of the wire.

[0008] In one embodiment, the snap-fit ​​plate is provided with a first mounting hole and a second mounting hole at intervals along the height direction of the interface terminal;

[0009] The snap-fit ​​assembly includes a transmission rod, a guide rod, and a clamping plate; the guide rod passes through the first mounting hole and is fixedly connected to the clamping plate; the transmission rod passes through the second mounting hole and can abut against the clamping plate, and the transmission rod is threadedly connected to the wall of the second mounting hole;

[0010] When the transmission rod rotates around its own axis of rotation, it can abut against the clamping plate and drive the guide rod and the clamping plate to move closer to the conductor along the first direction.

[0011] In one embodiment, the CT polarity testing device further includes a protective cover, which is rotatably connected to the test body, and the protective cover has a protected position and an open position relative to the test body;

[0012] In the protected position, the protective cover is positioned above the interface terminal; in the open position, the protective cover is positioned on the side of the test body opposite to the interface terminal.

[0013] In one embodiment, the CT polarity testing device further includes a transmission assembly that is pulsatorically connected to the protective cover. The transmission assembly is used to drive the protective cover to rotate relative to the test body, so that the protective cover switches between the protected position and the open position.

[0014] In one embodiment, the transmission assembly includes a first transmission assembly and a second transmission assembly;

[0015] The first transmission component is used to drive the protective cover to rotate from the protected position to the first preset position; the second transmission component is used to drive the protective cover to rotate from the first preset position to the open position.

[0016] In one embodiment, the test body is constructed with two opposing side plates along its own width direction;

[0017] The first transmission assembly includes a first rotating shaft, a fixed plate, and a first driving component; the axis of the first rotating shaft is a first axis, the fixed plate is sleeved and fixedly connected to the outer periphery of the first rotating shaft, the fixed plate is connected to the protective cover, and the first driving component is connected to the first rotating shaft in a transmission connection.

[0018] When the first driving member drives the first rotating shaft to rotate around the first axis, it can drive the fixing plate and the protective cover to rotate relative to the test body around the first axis, so that the protective cover rotates from the protective position to the first preset position.

[0019] In one embodiment, the second transmission assembly includes a second rotating shaft and a second driving member; the axis of the second rotating shaft is a second axis, one end of the second rotating shaft is rotatably connected to the outer periphery of the fixed plate, and the other end of the second rotating shaft is fixedly connected to the protective cover; the second driving member is drively connected to the second rotating shaft.

[0020] When the second driving member drives the second rotating shaft to rotate around the second axis, it can drive the protective cover to rotate relative to the test body around the second axis, so that the protective cover rotates from the first preset position to the open position.

[0021] In one embodiment, the CT polarity testing device further includes a mounting plate disposed on the side of the protective cover opposite to the testing body; the mounting plate is fixedly connected to the protective cover; the mounting plate is configured with a first receiving cavity having a first opening;

[0022] The CT polarity testing device further includes a grip and a third transmission assembly; the grip is slidably connected to the side wall of the first opening, and the third transmission assembly is drively connected to the grip; the third transmission assembly is used to drive the grip to slide relative to the side wall of the first opening, so that the grip extends into or out of the first receiving cavity.

[0023] In one embodiment, the CT polarity testing device further includes a vacuum adsorption component connected to the mounting plate, which is used to adsorb and fix the mounting plate to a second preset position.

[0024] In one embodiment, the mounting plate is further configured with a vacuum chamber and a vacuum suction hole;

[0025] The vacuum adsorption assembly includes a piston rod, a first one-way valve, a first connecting pipe, a second one-way valve, and a second connecting pipe. At least a portion of the piston rod is housed within the vacuum chamber and is slidably connected to the side wall of the vacuum chamber.

[0026] One end of the first connecting pipe is connected to the vacuum chamber through the first one-way valve, and the other end of the first connecting pipe is connected to the external environment; one end of the second connecting pipe is connected to the vacuum chamber through the second one-way valve, and the other end of the second connecting pipe is connected to the vacuum suction port;

[0027] When the piston rod reciprocates relative to the side wall of the vacuum chamber, the gas in the second connecting pipe can be transmitted to the vacuum chamber through the second one-way valve, and then to the external environment through the first one-way valve and the first connecting pipe, so that the vacuum suction hole can adsorb and fix the mounting plate to the second preset position.

[0028] When the CT unit is replaced or reassembled, the CT polarity test is performed on the CT unit using the aforementioned CT polarity test device. At this time, the wire connected to the CT unit is inserted into the interface terminal on the CT polarity test device, so that at least two snap-fit ​​components move closer to the wire in the first direction, so that at least two snap-fit ​​components abut and clamp the outer periphery of the wire at the interface terminal. This makes it difficult for the wire at the interface terminal to sway left and right, and it is also difficult for it to separate from the interface terminal. This reduces the possibility of the wire separating from the interface terminal when subjected to the pulling force of the external environment. This makes the whole test process safer and the test results more accurate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the protective cover in the protected position of a CT polarity testing device provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram showing the connection between the test body and the interface terminals in the CT polarity testing device.

[0031] Figure 3 for Figure 1 The diagram shows the installation of the interface terminals, wiring plugs, snap-fit ​​plates, and snap-fit ​​components in the CT polarity testing device.

[0032] Figure 4 for Figure 1 A schematic diagram showing the connection between the side plate and the first and second transmission components in the CT polarity testing device.

[0033] Figure 5 for Figure 1 A schematic diagram showing the protective cover of the CT polarity testing device in the open position;

[0034] Figure 6 for Figure 5 A magnified view of point A shown below;

[0035] Figure 7 for Figure 1 A schematic diagram showing the connection between the mounting plate, handle, and vacuum adsorption assembly in the CT polarity testing device.

[0036] Figure 8 for Figure 7 The enlarged view of point B shown;

[0037] Figure 9 for Figure 7 A magnified view of point C shown below;

[0038] Figure 10 for Figure 7The enlarged view of point D shown;

[0039] Figure 11 for Figure 7 The enlarged view of point E shown;

[0040] Figure 12 for Figure 11 The enlarged view of point F shown;

[0041] Figure 13 for Figure 11 The enlarged view of point G shown.

[0042] Reference numerals: 100-Test body; 110-Interface terminal; 120-Connecting plug; 130-Side plate; 140-Snap-fit ​​plate; 141-First mounting hole; 142-Second mounting hole; 200-Wire; 300-Snap-fit ​​assembly; 310-Transmission rod; 320-Guide rod; 330-Clamping plate; 400-Protective cover; 510-First transmission assembly; 511-First rotating shaft; 512-Fixing plate; 513-First driving component; 5131-First worm gear; 5132-First worm; 514-First mounting box; 520-Second transmission assembly; 521-Second rotating shaft; 522-Second driving component; 5221-Second worm gear; 5222-Second worm; 523-Second mounting box; 600-Installation Plate; 610-First receiving cavity; 611-First opening; 620-Vacuum cavity; 630-Vacuum suction hole; 640-Connecting plate; 650-Second receiving cavity; 660-Third connecting pipe; 671-First magnetic suction element; 672-Second magnetic suction element; 673-Ventilation interface; 674-Ventilation valve block; 680-Snap-fit ​​block; 681-Snap-fit ​​groove; 690-Elastic element; 691-Snap-fit ​​post; 700-Handle; 800-Third transmission assembly; 810-Lead screw; 820-Lead screw nut; 830-Third worm gear; 840-Third worm; 900-Vacuum adsorption assembly; 910-Piston rod; 911-Handle; 9111-Third receiving cavity; 920-First connecting pipe; 930-Second connecting pipe. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] See Figures 1-3 , Figure 1 A schematic diagram of the protective cover 400 in the protective position in a CT polarity testing device provided according to an embodiment of the present invention is shown; Figure 2 It shows Figure 1 A schematic diagram showing the connection between the test body 100 and the interface terminal 110 in the CT polarity testing device shown. Figure 3 It shows Figure 1 The diagram shows the installation of the interface terminal 110, wiring plug 120, snap-fit ​​plate 140, and snap-fit ​​assembly 300 in the CT polarity testing device.

[0050] An embodiment of the present invention provides a CT polarity testing device, which includes a test body 100, a snap-fit ​​plate 140, and snap-fit ​​components 300. The test body 100 has an interface terminal 110 for electrical connection with a wire 200. The snap-fit ​​plate 140 is connected to the test body 100, and there are at least two snap-fit ​​plates 140, which are spaced apart and opposite to each other on the outer periphery of the interface terminal 110. There are at least two snap-fit ​​components 300, each of which passes through a snap-fit ​​plate 140 and is slidably connected to it. Each snap-fit ​​component 300 can move closer to or further away from the wire 200 along a first direction. Specifically, the first direction is... Figure 1 The xx' direction in the polarity test device is the length direction of the entire polarity test device; when at least two snap-fit ​​components 300 are close to the wire 200, the snap-fit ​​components 300 can abut and clamp the outer periphery of the wire 200.

[0051] When the CT body is replaced or reassembled, and the CT polarity test is performed on the CT body using the CT polarity testing device provided in this embodiment of the invention, the wire 200 connected to the CT body is inserted into the interface terminal 110 on the CT polarity testing device. This causes at least two snap-fit ​​components 300 to move closer to the wire 200 in a first direction, so that the at least two snap-fit ​​components 300 abut against and clamp the outer periphery of the wire 200 at the interface terminal 110. This makes it less likely for the wire 200 at the interface terminal 110 to sway left and right or to separate from the interface terminal 110. This reduces the possibility of the wire 200 separating from the interface terminal 110 when subjected to pulling forces from the external environment. This makes the entire testing process safer and the test results more accurate.

[0052] In one specific embodiment, there are two snap-fit ​​plates 140 and two snap-fit ​​components 300 at the outer periphery of each interface terminal 110. The two snap-fit ​​components 300 abut and clamp the wire 200 at each interface terminal 110. Of course, in other embodiments, the number of snap-fit ​​plates 140 can also be three, four, etc., and the number of snap-fit ​​components 300 can also be three, four, etc. There is no special limitation, as long as they can cooperate with each other and clamp the outer periphery of the wire 200.

[0053] In one specific embodiment, there are four interface terminals 110, which are spaced apart on the test body 100 for connection with different ports of the CT body under test.

[0054] In one specific embodiment, the CT polarity testing device further includes a communication module, which is electrically connected to the interface terminal 110. When the wire 200 is inserted into the interface terminal 110, the test body 100 and the CT body under test can be connected to form a closed loop. The communication module can then obtain the electrical signal information of the closed loop and thus obtain the corresponding test results.

[0055] The following is a detailed description of the structure of the CT polarity testing device. Please refer to [link / reference needed]. Figures 4-13 , Figure 4 It shows Figure 1 A schematic diagram showing the connection between the side plate 130 and the first transmission assembly 510 and the second transmission assembly 520 in the CT polarity testing device shown. Figure 5 It shows Figure 1 A schematic diagram showing the protective cover 400 in the open position of the CT polarity testing device. Figure 6 It shows Figure 5 A magnified view of point A shown below; Figure 7 It shows Figure 1A schematic diagram showing the connection between the mounting plate 600, the handle 700, and the vacuum adsorption assembly 900 in the CT polarity testing device shown. Figure 8 It shows Figure 7 The enlarged view of point B shown; Figure 9 It shows Figure 7 A magnified view of point C shown below; Figure 10 It shows Figure 7 The enlarged view of point D shown; Figure 11 It shows Figure 7 The enlarged view of point E shown; Figure 12 It shows Figure 11 The enlarged view of point F shown; Figure 13 It shows Figure 11 The enlarged view of point G shown.

[0056] Please see Figure 1 and Figure 3 In one embodiment of the CT polarity testing device provided by the present invention, the test body 100 is further provided with a wiring plug 120. The wiring plug 120 is installed at the interface terminal 110, and the wire 200 passes through the wiring plug 120 and is electrically connected to the interface terminal 110. By providing the wiring plug 120, the connection between the wire 200 and the interface terminal 110 is more stable, the wire 200 is less likely to separate from the interface terminal 110, the entire testing process is safer, and the test results are more accurate. Specifically, the snap-fit ​​component 300 can abut against and clamp the outer periphery of the wire 200 at the wiring plug 120.

[0057] Please see Figure 3 In one embodiment of the present invention, the snap-fit ​​plate 140 of the CT polarity testing device is provided with a first mounting hole 141 and a second mounting hole 142 spaced apart along the height direction of the interface terminal 110. Specifically, the height direction of the interface terminal 100 is... Figure 3 The zz' direction in the middle; the snap-fit ​​assembly 300 includes a transmission rod 310, a guide rod 320 and a clamping plate 330; the guide rod 320 passes through the first mounting hole 141 and is fixedly connected to the clamping plate 330; the transmission rod 310 passes through the second mounting hole 142 and can abut against the clamping plate 330, and the transmission rod 310 is threadedly connected to the hole wall of the second mounting hole 142; when the transmission rod 310 rotates around its own rotation axis, it can abut against the clamping plate 330 and drive the guide rod 320 and the clamping plate 330 to move closer to the conductor 200 in the first direction.

[0058] When the wire 200 connected to the CT body under test is inserted into the interface terminal 110, the transmission rod 310 rotates around its own axis of rotation, allowing it to move relative to the wall of the second mounting hole 142. This causes the transmission rod 310 to abut against the clamping plate 330, and the clamping plate 330 to move closer to the guide in the first direction, thus clamping the outer periphery of the wire 200. During this process, the guide rod 320 moves synchronously with the clamping plate 330, preventing the clamping plate 330 from rotating around the axis of rotation of the transmission rod 310. After the test is completed, the transmission rod 310 is rotated in the opposite direction around its own axis of rotation, causing it to separate from the clamping plate 330. At this point, pulling the guide rod 320 separates the clamping plate 330 from the outer periphery of the wire 200, releasing the clamping plate 330 from the wire 200.

[0059] It should be noted that the clamping plate provided in this embodiment of the invention has a partially arc-shaped structure on the side near the wire 200. This allows it to better fit the outer periphery of the wire 200, thereby achieving a better clamping effect. Therefore, the clamping plate 330 cannot rotate around the rotation axis of the transmission rod 310. However, in other embodiments, when the side of the clamping plate 330 near the wire 200 is a planar structure tangent to the outer periphery of the wire 200, the clamping plate 330 can also be fixedly connected to the transmission rod 310, so that when the transmission rod 310 rotates around its own rotation axis, the clamping plate 330 rotates synchronously and moves closer to the outer periphery of the wire 200.

[0060] Please see Figure 1 and Figure 5 The CT polarity testing device provided in one embodiment of the present invention further includes a protective cover 400, which is rotatably connected to the test body 100. The protective cover 400 has a protected position and an open position relative to the test body 100. In the protected position, the protective cover 400 covers the interface terminal 110. In the open position, the protective cover 400 is located on the side of the test body 100 away from the interface terminal 110. By providing the protective cover 400, when the CT polarity testing device is not in use, it can be covered above the interface terminal 110, thereby preventing dust and other debris from entering the interior of the interface terminal 110.

[0061] Specifically, one embodiment of the CT polarity testing device provided by the present invention further includes a transmission assembly, which is pulsatorically connected to the protective cover 400. The transmission assembly is used to drive the protective cover 400 to rotate relative to the test body 100, thereby switching the protective cover 400 between a protected position and an open position. By driving the protective cover 400 to rotate relative to the test body 100 through the transmission assembly, the protective cover 400 can be switched between the protected position and the open position, thus avoiding the need for the operator to manually rotate the protective cover 400, making it more convenient.

[0062] Please see Figure 1 and Figure 5 The transmission assembly of the CT polarity testing device provided in one embodiment of the present invention includes a first transmission assembly 510 and a second transmission assembly 520; the first transmission assembly 510 is used to drive the protective cover 400 to rotate from the protected position to a first preset position; the second transmission assembly 520 is used to drive the protective cover 400 to rotate from the first preset position to the open position.

[0063] When the protective cover 400 is in the protected position, it is positioned above the interface terminal 110. However, when in the open position, to avoid the entire testing device occupying a larger contact area and to ensure a more symmetrical structure, the protective cover 400 needs to be rotated to a position directly below the side of the testing body 100 away from the interface terminal 110. This allows the center of gravity of the protective cover 400 to coincide with that of the testing body 100, making the entire testing device more stable during testing. Therefore, by setting the first transmission component 510 and the second transmission component 520, the protective cover 400, under the combined action of the two transmission components, is positioned directly below the side of the testing body 100 away from the interface terminal 110 when rotated from the protected position to the open position.

[0064] Please see Figure 4 and combined Figure 6 In one embodiment of the present invention, the test body 100 of the CT polarity testing device is constructed with two opposing side plates 130 along its width direction. Specifically, the width direction of the test body 100 is... Figure 3 or Figure 4 The first transmission assembly 510 includes a first rotating shaft 511, a fixing plate 512, and a first driving member 513. The axis of the first rotating shaft 511 is the first axis. The fixing plate 512 is sleeved and fixedly connected to the outer periphery of the first rotating shaft 511. The fixing plate 512 is connected to the protective cover 400. The first driving member 513 is connected to the first rotating shaft 511 in a transmission manner. When the first driving member 513 drives the first rotating shaft 511 to rotate around the first axis, it can drive the fixing plate 512 and the protective cover 400 to rotate relative to the test body 100 around the first axis, so that the protective cover 400 rotates from the protection position to the first preset position.

[0065] Specifically, the first axis is... Figure 4 The axis parallel to the yy' direction, that is, perpendicular to Figure 1 The axis of the xx'zz' plane, when the first driving member 513 drives the first rotating shaft 511 to rotate around the first axis, drives the fixing plate and the protective cover 400 to rotate relative to the test body 100 around the first axis, so that the protective cover 400 moves from the test body 100. Figure 1 The part located above the interface terminal 110 is rotated to the first preset position below the interface terminal 110.

[0066] In one specific embodiment, the first driving component 513 comprises a first worm gear 5131 and a first worm 5132. The first worm gear 5131 is sleeved and fixed on the first rotating shaft 511, and the first worm 5132 cooperates with the first worm gear 5131. By rotating the first worm 5132, the user drives the first worm gear 5131 to rotate, thereby causing the first rotating shaft 511 to rotate around the rotation axis of the first worm gear 5131. Specifically, the rotation axis of the first worm gear 5131 coincides with the axis of the first rotating shaft 511. Of course, in other embodiments, the first driving component 513 can also be a motor or a gear and rack transmission structure, and there is no special limitation on this.

[0067] Please see Figure 4 and Figure 6 In one embodiment of the present invention, the first transmission component 510 of the CT polarity testing device further includes a first mounting box 514. The first mounting box 514 is mounted on one of the side plates 130 on the side opposite to the fixed plate 512, and one end of the first rotating shaft 511 extends into the first mounting box 514. The first worm gear 5131 is housed in the first mounting box 514 and is fixedly connected to the end of the first rotating shaft 511. One end of the first worm 5132 extends out of the first mounting box 514 and is provided with a rotating handle, which facilitates the user to hold and rotate the first worm 5132.

[0068] Please see Figure 4 and combined Figure 6 The second transmission component 520 of the CT polarity testing device provided in one embodiment of the present invention includes a second rotating shaft 521 and a second driving member 522; the axis of the second rotating shaft 521 is a second axis, one end of the second rotating shaft 521 is rotatably connected to the outer periphery of the fixing plate 512, and the other end of the second rotating shaft 521 is fixedly connected to the protective cover 400; the second driving member 522 is transmissionally connected to the second rotating shaft 521; when the second driving member 522 drives the second rotating shaft 521 to rotate around the second axis, it can drive the protective cover 400 to rotate relative to the test body 100 around the second axis, so that the protective cover 400 rotates from a first preset position to an open position.

[0069] Specifically, the second axis is... Figure 6 The axis parallel to the xx' direction is such that when the second driving member 522 drives the second rotating shaft 521 to rotate around the second axis, it can drive the protective cover 400 to rotate relative to the test body 100 around the second axis, so that the protective cover 400 can rotate along the second axis. Figure 2 The protective cover 400 is moved in the yy' direction so that it is directly below the test body 100 on the side away from the interface terminal 110.

[0070] In one specific embodiment, the second driving component 522 is a second worm gear 5221 and a second worm 5222. The second worm gear 5221 is sleeved and fixed on the second rotating shaft 521. The second worm 5222 cooperates with the second worm gear 5221. By rotating the second worm 5222, the user drives the second worm gear 5221 to rotate, thereby causing the second rotating shaft 521 to rotate around the rotation axis of the second worm gear 5221. Specifically, the rotation axis of the second worm gear 5221 coincides with the axis of the second rotating shaft 521. Of course, in other embodiments, the second driving component 522 can also be a motor or a gear and rack transmission structure, etc., and there is no special limitation on this.

[0071] Please see Figure 4 and Figure 6 In one embodiment of the present invention, the second transmission component 520 of the CT polarity testing device further includes a second mounting box 523, which is mounted on a fixed plate 512, and one end of the second rotating shaft 521 extends into the second mounting box 523. A second worm gear 5221 is housed within the second mounting box 523 and fixedly connected to the end of the second rotating shaft 521. At least one end of the second worm 5222 extends out of the second mounting box 523 and is provided with a rotating handle, facilitating the user to hold and rotate the second worm 5222.

[0072] It should be noted that the protective cover 400 of the CT polarity testing device provided in this embodiment of the invention is only for protecting the interface terminal 110. Therefore, for better economic efficiency, the protective cover 400 does not need to completely cover the entire surface of the test body 100 where the interface terminal 110 is provided. So when the protective cover 400 is in the protective position, it can only partially cover the surface of the test body 100 where the interface terminal 110 is provided. Therefore, when the protective cover 400 rotates relative to the test body 100 around the first axis through the first transmission component 510, it cannot make the center of gravity of the protective cover 400 coincide with the center of gravity of the test body 100. At this time, it is necessary to use the second transmission component 520 to drive the protective cover 400 to continue to rotate relative to the test body 100 around the second axis, so that the center of gravity of the protective cover 400 can finally coincide with the center of gravity of the test body 100, and the entire testing device is more stable during the testing process.

[0073] Please see Figure 1 , Figure 5 and Figures 7-9The CT polarity testing device provided in one embodiment of the present invention further includes a mounting plate 600, which is disposed on the side of the protective cover 400 opposite to the testing body 100; the mounting plate 600 is fixedly connected to the protective cover 400; the mounting plate 600 is constructed with a first receiving cavity 610 having a first opening 611; the CT polarity testing device further includes a handle 700 and a third transmission assembly 800; the handle 700 is slidably connected to the side wall of the first opening 611, and the third transmission assembly 800 is drively connected to the handle 700; the third transmission assembly 800 is used to drive the handle 700 to slide relative to the side wall of the first opening 611, so that the handle 700 extends into or out of the first receiving cavity 610. By providing the handle 700 and the third transmission assembly 800, and by driving the handle 700 to slide relative to the side wall of the first opening 611 through the third transmission assembly 800, the handle 700 can extend into or out of the first receiving cavity 610, thereby allowing the user to hold the handle 700 and use the device, which is more convenient.

[0074] In one embodiment, the handle 700 is positioned on the centerline of the mounting plate 600, which is located on the side of the protective cover 400 away from the test body 100. Through the combined action of the first transmission component 510 and the second transmission component 520, the center of gravity of the protective cover 400 coincides with the center of gravity of the test body 100. Consequently, the handle 700 is also positioned on the centerline of the center of gravity of the test body 100. This ensures that when the user holds the handle 700 to conduct the test experiment, the center of gravity of the device is located on the centerline of the handle 700, thus making the entire test device less prone to eccentric tipping.

[0075] Please see Figure 9The CT polarity testing device provided in one embodiment of the present invention further includes a connecting plate 640, and a third transmission assembly 800 including a lead screw 810, a lead screw 810 nut 820, a third worm gear 830, and a third worm 840. A second receiving cavity 650 communicating with the first receiving cavity 610 is constructed on the mounting plate 600. The third worm 840 is at least partially housed within the second receiving cavity 650, and one end of the third worm 840 extends out of the second receiving cavity 650. The third worm gear 830 is housed within the second receiving cavity 650 and cooperates with the third worm 840, and the third worm gear 830 is sleeved and fixed to the outer periphery of the lead screw 810. The lead screw 810 nut 820 is installed on the outer periphery of the lead screw 810, and the lead screw 810 nut 820 is fixedly connected to the connecting plate 640. The side of the connecting plate 640 facing away from the lead screw 810 nut 820 is fixedly connected to the handle 700. When the user rotates the third worm 840, the third worm 840 drives the third worm wheel 830 to rotate around its own rotation axis, which in turn drives the lead screw 810 to rotate. The lead screw 810 then drives the lead screw 810 nut 820 to move up and down along the height direction of the lead screw 810, thus causing the connecting plate 640 and the handle 700 to extend into or out of the first receiving cavity 610.

[0076] Please see Figure 7 The CT polarity testing device provided in one embodiment of the present invention further includes a vacuum adsorption component 900, which is connected to the mounting plate 600. The vacuum adsorption component 900 is used to adsorb and fix the mounting plate 600 to a second preset position. By setting the vacuum adsorption component 900, the mounting plate 600 can be adsorbed and fixed to the second preset position, thereby allowing the entire CT polarity testing device to be fixed in different preset positions. The entire device is also less prone to tipping over during testing, making the use process safer.

[0077] For details, please refer to Figure 7 , Figure 10 and Figure 11In one embodiment of the present invention, the mounting plate 600 of the CT polarity testing device further comprises a vacuum chamber 620 and a vacuum suction port 630; the vacuum adsorption assembly 900 includes a piston rod 910, a first one-way valve, a first connecting pipe 920, a second one-way valve, and a second connecting pipe 930. At least a portion of the piston rod 910 is accommodated within the vacuum chamber 620 and is slidably connected to the side wall of the vacuum chamber 620; one end of the first connecting pipe 920 is connected to the vacuum chamber 620 through the first one-way valve, and the first connecting pipe 920... The other end is connected to the external environment; one end of the second connecting pipe 930 is connected to the vacuum chamber 620 through the second one-way valve, and the other end of the second connecting pipe 930 is connected to the vacuum suction hole 630; when the piston rod 910 reciprocates relative to the side wall of the vacuum chamber 620, the gas in the second connecting pipe 930 can be transmitted to the vacuum chamber 620 through the second one-way valve, and then transmitted to the external environment through the first one-way valve and the first connecting pipe 920, so that the vacuum suction hole 630 adsorbs and fixes the mounting plate 600 to the second preset position.

[0078] Please refer to the figure. In one embodiment of the present invention, the mounting plate 600 of the CT polarity testing device is also constructed with a third connecting pipe 660. The third connecting pipe 660 is connected to the second connecting pipe 930 and the third connecting pipe 660 is connected to the vacuum suction port 630, so that the vacuum suction port 630 can be connected to the vacuum chamber 620 through the third connecting pipe 660 and the second connecting pipe 930.

[0079] When the device needs to be fixed in the second preset position using the vacuum adsorption assembly 900, the user pulls the piston rod 910, causing it to reciprocate within the vacuum chamber 620. This allows gas in the second connecting pipe 930 to enter the vacuum chamber 620 through the second one-way valve. The gas in the vacuum chamber 620 is then transferred to the external environment via the first one-way valve and the first connecting pipe 920, thus reducing the air pressure within the second connecting pipe 930. This creates a vacuum in the vacuum suction port 630 connected to the second connecting pipe 930, ultimately adsorbing and fixing the mounting plate 600 in the second preset position through the vacuum suction port 630, thereby securing the device. It should be noted that the second preset position is not limited in any way and can be selected based on the actual usage environment.

[0080] Please see Figure 11 and Figure 12 The piston rod 910 of the CT polarity testing device provided in one embodiment of the present invention also includes a handle 911, which facilitates the user to pull and make the piston rod 910 reciprocate within the vacuum chamber 620.

[0081] Please continue reading. Figure 11 and Figure 12In one embodiment of the present invention, the handle 911 of the CT polarity testing device has a third receiving cavity 9111 on one side. An elastic member 690 is connected to the bottom wall of the third receiving cavity 9111. A locking post 691 is provided on the side of the elastic member 690 facing away from the bottom wall of the third receiving cavity 9111. A locking block 680 is also protruding from the mounting plate 600 along its length direction. Specifically, the length direction of the mounting plate 600 is... Figure 7 In the xx' direction, the snap-fit ​​block 680 has a snap-fit ​​groove 681, and the snap-fit ​​post 691 can be inserted into the snap-fit ​​groove 681 to limit the piston rod 910. When the mounting plate 600 needs to be adsorbed and fixed to the second preset position by the vacuum adsorption assembly 900, the elastic member 690 is pressed down, causing the snap-fit ​​post 691 to separate from the snap-fit ​​groove 681, thereby allowing the piston rod 910 to reciprocate within the vacuum chamber 620. When the piston rod 910 does not need to reciprocate, the snap-fit ​​post 691 is inserted into the snap-fit ​​groove 681 to prevent the piston rod 910 from shaking randomly.

[0082] Please see Figure 13 The mounting plate 600 of the CT polarity testing device provided in one embodiment of the present invention further includes a venting interface 673, which is connected to the second connecting pipe 930 and has threads. The CT polarity testing device also includes a venting valve block 674, which can be threadedly connected to the venting interface 673. When the test is completed and it is necessary to separate the fixed mounting plate 600 from the second preset position, the venting valve block 674 is screwed on to separate it from the venting interface 673. This allows air from the external environment to enter the vacuum suction hole 630 through the second connecting pipe 930, thereby reducing the vacuum level in the vacuum suction hole 630 and ultimately releasing the mounting plate 600 from vacuum adsorption. When it is necessary to vacuum adsorb the mounting plate 600 again, the venting valve block 674 is connected to the venting interface 673 to seal the venting interface 673.

[0083] Please see Figure 11 and Figure 13 The CT polarity testing device provided in one embodiment of the present invention further includes a first magnetic 671 and a second magnetic 672. The first magnetic 671 is disposed on the side of the vent valve block 674 opposite to the vent interface 673, and the second magnetic 672 is mounted on the mounting plate 600. When the vent valve block 674 is separated from the vent interface 673, the magnetic attraction between the first magnetic 671 and the second magnetic 672 allows the vent valve block 674 to be attracted to the mounting plate 600, facilitating the removal of the vent valve block 674 and preventing it from being lost.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A CT polarity testing device, characterized in that, The CT polarity testing device includes: The test body (100) has an interface terminal (110) configured thereon, the interface terminal (110) being used for electrical connection with a wire (200); A snap-fit ​​plate (140) is connected to the test body (100). There are at least two snap-fit ​​plates (140), and the at least two snap-fit ​​plates (140) are spaced apart and disposed opposite to each other on the outer periphery of the interface terminal (110). The snap-fit ​​plate (140) is provided with a first mounting hole (141) and a second mounting hole (142) spaced apart along the height direction of the interface terminal (110). The snap-fit ​​assembly (300) has at least two components, each of which passes through and is slidably connected to a snap-fit ​​plate (140), and each of the snap-fit ​​assemblies (300) can move closer to or further away from the wire (200) in a first direction; when at least two of the snap-fit ​​assemblies (300) are close to the wire (200), the snap-fit ​​assembly (300) can abut against and clamp the outer periphery of the wire (200); The snap-fit ​​assembly (300) includes a transmission rod (310), a guide rod (320), and a clamping plate (330); the guide rod (320) passes through the first mounting hole (141) and is fixedly connected to the clamping plate (330); the transmission rod (310) passes through the second mounting hole (142) and can abut against the clamping plate (330), and the transmission rod (310) is threadedly connected to the wall of the second mounting hole (142); When the transmission rod (310) rotates around its own rotation axis, it can abut against the clamping plate (330) and drive the guide rod (320) and the clamping plate (330) to move closer to the conductor (200) in the first direction.

2. The CT polarity testing device according to claim 1, characterized in that, The CT polarity testing device also includes a protective cover (400), which is rotatably connected to the test body (100), and the protective cover (400) has a protective position and an open position relative to the test body (100); In the protected position, the protective cover (400) covers the interface terminal (110); in the open position, the protective cover (400) is located on the side of the test body (100) away from the interface terminal (110).

3. The CT polarity testing device according to claim 2, characterized in that, The CT polarity testing device also includes a transmission component, which is connected to the protective cover (400) in a transmission manner. The transmission component is used to drive the protective cover (400) to rotate relative to the test body (100) so that the protective cover (400) switches between the protected position and the open position.

4. The CT polarity testing device according to claim 3, characterized in that, The transmission assembly includes a first transmission assembly (510) and a second transmission assembly (520); The first transmission component (510) is used to drive the protective cover (400) to rotate from the protected position to the first preset position; the second transmission component (520) is used to drive the protective cover (400) to rotate from the first preset position to the open position.

5. The CT polarity testing device according to claim 4, characterized in that, The test body (100) has two oppositely arranged side plates (130) along its own width direction. The first transmission assembly (510) includes a first rotating shaft (511), a fixing plate (512), and a first driving member (513); the axis of the first rotating shaft (511) is a first axis, the fixing plate (512) is sleeved and fixedly connected to the outer periphery of the first rotating shaft (511), the fixing plate (512) is connected to the protective cover (400), and the first driving member (513) is connected to the first rotating shaft (511) in a transmission connection; When the first driving member (513) drives the first rotating shaft (511) to rotate around the first axis, it can drive the fixing plate (512) and the protective cover (400) to rotate around the first axis relative to the test body (100), so that the protective cover (400) rotates from the protective position to the first preset position.

6. The CT polarity testing device according to claim 5, characterized in that, The second transmission assembly (520) includes a second rotating shaft (521) and a second driving member (522); the axis of the second rotating shaft (521) is a second axis, one end of the second rotating shaft (521) is rotatably connected to the outer periphery of the fixed plate (512), and the other end of the second rotating shaft (521) is fixedly connected to the protective cover (400); the second driving member (522) is drively connected to the second rotating shaft (521); When the second driving member (522) drives the second rotating shaft (521) to rotate around the second axis, it can drive the protective cover (400) to rotate relative to the test body (100) around the second axis, so that the protective cover (400) rotates from the first preset position to the open position.

7. The CT polarity testing device according to claim 2, characterized in that, The CT polarity testing device further includes a mounting plate (600), which is disposed on the side of the protective cover (400) away from the test body (100); the mounting plate (600) is fixedly connected to the protective cover (400); the mounting plate (600) is constructed with a first receiving cavity (610) having a first opening (611). The CT polarity testing device further includes a grip (700) and a third transmission assembly (800); the grip (700) is slidably connected to the side wall of the first opening (611), and the third transmission assembly (800) is drively connected to the grip (700); the third transmission assembly (800) is used to drive the grip (700) to slide relative to the side wall of the first opening (611), so that the grip (700) extends into or out of the first receiving cavity (610).

8. The CT polarity testing device according to claim 7, characterized in that, The CT polarity testing device further includes a vacuum adsorption component (900), which is connected to the mounting plate (600). The vacuum adsorption component (900) is used to adsorb and fix the mounting plate (600) to a second preset position.

9. The CT polarity testing device according to claim 8, characterized in that, The mounting plate (600) is also configured with a vacuum chamber (620) and a vacuum suction hole (630). The vacuum adsorption assembly (900) includes a piston rod (910), a first one-way valve, a first connecting pipe (920), a second one-way valve, and a second connecting pipe (930). At least a portion of the piston rod (910) is housed within the vacuum chamber (620) and is slidably connected to the side wall of the vacuum chamber (620). One end of the first connecting pipe (920) is connected to the vacuum chamber (620) through the first one-way valve, and the other end of the first connecting pipe (920) is connected to the external environment; one end of the second connecting pipe (930) is connected to the vacuum chamber (620) through the second one-way valve, and the other end of the second connecting pipe (930) is connected to the vacuum suction port (630); When the piston rod (910) reciprocates relative to the side wall of the vacuum chamber (620), the gas in the second connecting pipe (930) can be transmitted to the vacuum chamber (620) through the second one-way valve, and then transmitted to the external environment through the first one-way valve and the first connecting pipe (920), so that the vacuum suction hole (630) can adsorb and fix the mounting plate (600) to the second preset position.

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