A power quality detector

Abstract

This utility model relates to the field of power quality testing technology and discloses a power quality tester, including a tester body. A terminal block is connected to the bottom of the tester body, and a cable is attached to the terminal block. An anti-disengagement component is installed on the terminal block. An installation component is installed on the tester body, comprising two support blocks fixedly connected to the top surface of the tester body. A rotating rod is rotatably connected within the two support blocks. A rotating block is rotatably sleeved on the outer ring of the rotating rod. A concave seat is fixed on the rotating block, and a rotating shaft is rotatably connected to the concave seat. This utility model reduces the additional tensile or torsional force on the cable, lowers the possibility of loosening between the terminal block and the cable due to force, avoids signal attenuation or interruption, ensures the accuracy of the test data, and eliminates interference caused by data deviation in power quality judgment.

Description

Technical Field

[0001] This utility model relates to the field of power quality detection technology, specifically to a power quality detector. Background Technology

[0002] A power quality detector is a safe and reliable instrument primarily used for monitoring load fluctuations. It is mainly used to measure and analyze the quality of AC power supplied from the public power grid to the user end, measuring and analyzing parameters such as frequency deviation, voltage deviation, permissible three-phase voltage unbalance, and grid harmonics.

[0003] For example, a power quality detection device with application number CN202323659674.6 includes a power quality detector body. Clamping assemblies are fixedly connected to the bottom and both sides of the power quality detector body. The clamping assemblies include a clamping plate, and a clamping plate is slidably disposed inside the clamping plate. The clamping plate and the clamping plate enclose a space for clamping the door of a distribution box. This utility model, by setting up clamping assemblies, utilizes the space enclosed between the slidably disposed clamping plate and the clamping plate to clamp the door of the distribution box within the clamping plate. Then, by using a screw-in threaded rod to drive the clamping plate, the door of the distribution box clamped in the clamping plate is fixed. This further prevents the power quality detector body from shaking when pressing the button to set parameters, thus ensuring the stability of the power quality detector body during use and making parameter adjustment more convenient.

[0004] In the aforementioned patent, the detector is installed on the door of a distribution box. When the operator adjusts the parameters, the hand operation will exert a direct force on the box door. This external force will be transmitted to the detector body through the box door, causing the detector to shake significantly. This shaking will cause the wiring cable to bear additional tension or torque, resulting in loosening between the wiring terminal and the cable, which in turn will lead to signal attenuation or interruption. This will directly cause deviation or even distortion in the detection data, affecting the accurate judgment of power quality. Furthermore, poor contact at the terminal interface will cause a sudden change in resistance during current transmission, which can easily cause local arc discharge and generate electric sparks, posing a serious safety risk.

[0005] Therefore, we propose a power quality detector to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a power quality detector to solve the problem mentioned in the background art that the detector is prone to shaking during use, which causes the connection terminals and cables to loosen, resulting in signal attenuation or interruption and deviation of the detection data.

[0007] This utility model provides the following technical solution: a power quality detector, including a detector body, a terminal block connected to the bottom of the detector body, a wiring cable snapped onto the terminal block, an anti-disconnection component installed on the terminal block, and an installation component installed on the detector body. The installation component includes two support blocks fixedly connected to the top surface of the detector body, a rotating rod rotatably connected inside the two support blocks, a rotating block rotatably sleeved on the outer ring of the rotating rod, a concave seat fixed on the rotating block, a rotating shaft rotatably connected to the concave seat, a connecting block fixedly sleeved on the outer ring of the rotating shaft, and a suction cup fixed on the top of the connecting block.

[0008] Preferably, the rotating rod has a first screw groove, which is arranged in a circumferential array. The rotating block has a second screw groove on its side wall, and a screw rod is threaded into the second screw groove. The screw rod is threadedly connected to the first screw groove.

[0009] Preferably, a frustum is fixed to one end of the rotating shaft, a plug rod is fixed to the other end of the rotating shaft, and a slot is provided on the side wall of the concave seat.

[0010] Preferably, multiple slots are arranged in a circumferential array, the insert rod is inserted into the slot, and through slots are opened on both sides of the concave seat, and the rotating shaft is slidably connected to the through slots.

[0011] Preferably, a knob is installed on the outer ring of the suction cup.

[0012] Preferably, the anti-disconnection component includes a support block fixedly connected to the bottom surface of the terminal block, a spring fixed to the inner wall of the support block, and a clamping ring fixed to the other end of the spring, the inner wall of the clamping ring being in contact with the outer wall of the wiring cable.

[0013] This utility model has the following beneficial effects:

[0014] 1. This testing instrument utilizes a threaded locking structure between the rotating rod and the rotating block, and a rigid fit design between the rotating shaft and the slot, to achieve multi-level angle adjustment in both forward and backward and left and right directions. This meets the installation requirements of different spatial layouts within distribution boxes. Operators can perform angle calibration without specialized tools, improving the instrument's adaptability in confined or complex environments. Compared to traditional box door installation methods, this design fundamentally avoids the problem of instrument shaking caused by box door opening and closing. By eliminating unnecessary movement of the instrument, it effectively reduces the additional tension or torque on the wiring cables, thereby reducing the possibility of loosening between the terminals and cables due to stress. This not only avoids signal attenuation or interruption, ensuring the accuracy of test data and eliminating interference caused by data deviations in power quality judgment, but also fundamentally reduces the safety risks of resistance changes and local arc discharges caused by poor contact at the terminal interface during current transmission, significantly improving the safety and reliability of the testing work.

[0015] 2. During use, this testing instrument can effectively resist external interference such as vibration and accidental pulling, prevent the wiring cable from loosening and falling off, ensure the continuity and stability of power signal transmission, avoid test data deviation caused by connection problems, and can be adapted to wiring cables of various diameters, thus improving its applicability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0018] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0019] Figure 4 This is a schematic diagram of the structure of some components of the mounting assembly of this utility model. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the structure of some components of the mounting assembly of this utility model. Figure 2 .

[0021] In the diagram: 1. Tester body; 2. Terminal block; 3. Wiring cable; 4. Anti-detachment component; 41. Support block; 42. Spring; 43. Clamping ring; 5. Mounting component; 51. Support block; 52. Rotating rod; 53. Rotating block; 531. Screw groove one; 532. Screw; 533. Screw groove two; 54. Concave seat; 55. Rotating shaft; 551. Frustum; 552. Insert rod; 553. Slot; 554. Through groove; 56. Connecting block; 57. Suction cup; 58. Knob. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] This embodiment aims to address the problems of inconvenient angle adjustment and unstable fixing when traditional power quality detectors are installed in distribution boxes, as well as loose wiring, data deviation, and safety hazards caused by limited installation space. Please refer to [link / reference needed]. Figure 1 and Figure 4 - Figure 5 An electrical quality detector includes a detector body 1, on which an installation assembly 5 is mounted. The installation assembly 5 includes two support blocks 51 fixedly connected to the top surface of the detector body 1. A rotating rod 52 is rotatably connected inside the two support blocks 51. A rotating block 53 is rotatably sleeved on the outer ring of the rotating rod 52. A concave seat 54 is fixed on the rotating block 53. The concave seat 54 has a "U"-shaped structure. A rotating shaft 55 is rotatably connected to the concave seat 54. A connecting block 56 is fixedly sleeved on the outer ring of the rotating shaft 55. A suction cup 57 is fixed on the top of the connecting block 56. A knob 58 is installed on the outer ring of the suction cup 57. The suction cup 57 is made of nitrile rubber and has good sealing performance and suction force. The knob 58 is installed on the outer ring to release the suction force. By rotating the knob 58, the internal air pressure of the suction cup 57 can be controlled to realize the suction and disassembly operations.

[0025] The rotating rod 52 has a first screw groove 531 inside, which is arranged in a circumferential array. The rotating block 53 has a second screw groove 533 on its side wall. A screw rod 532 is threadedly installed in the second screw groove 533. The screw rod 532 is threadedly connected to the first screw groove 531. The first screw groove 531 adopts an interval array design, which can realize multi-range and multi-level angle positioning to meet the installation requirements of different directions.

[0026] A frustum 551 is fixed at one end of the rotating shaft 55, and a rod 552 is fixed at the other end of the rotating shaft 55. A slot 553 is provided on the side wall of the concave seat 54. Multiple slots 553 are arranged in a circumferential array. The rod 552 is inserted into the slot 553. The slot 553 and the rod 552 are matched in size. Through grooves 554 are provided on both sides of the concave seat 54. The rotating shaft 55 is slidably connected to the through grooves 554.

[0027] In this embodiment: When adjusting the front-to-back angle, first rotate the screw 532 on the side wall of the rotating block 53. Since the screw 532 is threadedly connected to the screw groove 531 of the rotating rod 52 and the screw groove 533 of the rotating block 53, during rotation, the threaded transmission will drive the screw 532 to gradually disengage from the screw groove 531 and the screw groove 533 along the axial direction until it is completely disengaged from the rotating block 53 structure. At this time, the rotation restriction of the rotating block 53 is released. The operator can freely rotate the rotating block 53 to adjust the detector to a horizontal angle that matches the internal space of the distribution box. After confirming the angle, rotate the screw 532 in the opposite direction. Under the action of the threaded push, the screw 532 gradually resets along the axial direction until its front end is fully embedded in the corresponding screw groove 531. The rotating block 53 is rigidly locked by the tight engagement of the screw 532 and the double screw grooves, thus completing the fixation of the front-to-back angle.

[0028] To adjust the left and right angles, the operator pushes the frustum 551 at the end of the rotating shaft 55 forward. Since the frustum 551 and the rotating shaft 55 are fixedly connected, the pushing force will cause the rotating shaft 55 to slide axially along the through groove 554 of the concave seat 54, simultaneously driving the insertion rod 552 at the other end of the rotating shaft 55 to disengage from the slot 553 structure on the side wall of the concave seat 54. At this time, the rotating shaft 55 is in a free-rotating state and can be rotated to the target angle according to the testing requirements. After the angle is calibrated, the frustum 551 is released and a pull-back force is applied, causing the rotating shaft 55 to slide in the opposite direction along the through groove 554 until the insertion rod 552 is precisely inserted into the slot 553 of the corresponding angle. The locking of the left and right angles is completed by the rigid cooperation between the insertion rod 552 and the slot 553.

[0029] After the angle adjustment is complete, apply pressure to the flat mounting surface inside the distribution box with suction cup 57, and rotate the outer ring knob 58 of suction cup 57 to expel internal air, using the air pressure difference to form a stable suction force. This installation method allows the detector to be flexibly fixed in any suitable position inside the distribution box, effectively avoiding the shaking phenomenon caused by the opening and closing of the box door compared to the traditional box door installation method. By reducing unnecessary movement of the detector, the risk of loose terminals of the wiring cable 3 due to tension or torque can be reduced, ensuring the stability and reliability of power signal transmission, fundamentally avoiding the deviation of detection data caused by wiring problems, as well as potential safety hazards such as electric sparks.

[0030] Example 2:

[0031] This embodiment aims to address the problem of loosening and detachment of the connection between the wiring cable 3 and the terminal 2 during power quality testing. This embodiment is an improvement upon Embodiment 1. For details, please refer to [link to Embodiment 1]. Figure 1 - Figure 3 A power quality detector includes a detector body 1, with a terminal block 2 connected to the bottom of the detector body 1. A cable 3 is clamped to the terminal block 2. An anti-detachment component 4 is installed on the terminal block 2. The anti-detachment component 4 includes a support block 41 fixedly connected to the bottom surface of the terminal block 2. The support blocks 41 are symmetrically distributed, and their inner walls are flat and smooth to ensure that the spring 42 can be stably installed and extend and retract normally. The spring 42 is fixed to the inner wall of the support block 41. The spring 42 is made of a material with good elastic recovery performance, which can ensure the clamping force on the cable without damaging the cable sheath due to excessive force. The specific specifications need to be selected according to the actual situation. A clamping ring 43 is fixed to the other end of the spring 42. The inner wall of the clamping ring 43 fits against the outer wall of the cable 3. The shape of the clamping ring 43 is adapted to the outer wall of the cable 3. The inner wall is frosted to increase the friction between the clamping ring and the cable, further improving the anti-detachment effect. The size of the clamping ring 43 can be adapted to the specifications of common cables 3.

[0032] In this embodiment: when the wiring cable 3 is not connected to the terminal 2, the spring 42 in the anti-disconnection component 4 is in a naturally extended state. At this time, the clamping ring 43 is in the initial position under the slight tension of the spring 42, and a certain opening is formed between the two symmetrically distributed clamping rings 43 to facilitate the insertion of the wiring cable 3.

[0033] When the wiring operation is performed and the wiring cable 3 is clipped onto the terminal 2, the wiring cable 3 will pass between the two clamping rings 43. During the insertion process, the outer wall of the cable will exert an outward pushing force on the clamping rings 43. After being subjected to force, the clamping rings 43 will move to both sides, thereby causing the connected spring 42 to be stretched. When the spring 42 is stretched, it undergoes elastic deformation, stores elastic potential energy, and at the same time generates an inward restoring force. This restoring force is transmitted to the outer wall of the wiring cable 3 through the clamping rings 43, so that the clamping rings 43 are tightly attached to the outer wall of the cable.

[0034] After the cable 3 is fully engaged, the elastic restoring force of the spring 42 keeps the clamping ring 43 in a clamped state. The inner wall of the clamping ring 43 fits tightly against the outer wall of the cable. The frosted inner wall increases the friction between the two. Combined with the continuous clamping force of the spring 42, it can effectively prevent the cable 3 from loosening or falling off due to external forces such as vibration and pulling during the use of the tester.

[0035] When it is necessary to disconnect the wiring cable 3, the operator pulls the cable outward, the outer wall of the cable pushes the clamping ring 43 more, the clamping ring 43 moves further to both sides, the spring 42 continues to be stretched, the opening increases, making it easier to remove the cable. After the cable is removed, the elastic potential energy of the spring 42 is released, which drives the clamping ring 43 to return to the initial position, waiting for the next wiring operation.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A power quality detector comprising a detector body (1), characterised in that: The bottom of the detector body (1) is connected to a terminal block (2), a wiring cable (3) is snapped onto the terminal block (2), an anti-detachment component (4) is installed on the terminal block (2), and an installation component (5) is installed on the detector body (1). The installation component (5) includes two support blocks (51) fixedly connected to the top surface of the detector body (1). A rotating rod (52) is rotatably connected inside the two support blocks (51). A rotating block (53) is rotatably sleeved on the outer ring of the rotating rod (52). A concave seat (54) is fixed on the rotating block (53). A rotating shaft (55) is rotatably connected on the concave seat (54). A connecting block (56) is fixedly sleeved on the outer ring of the rotating shaft (55). A suction cup (57) is fixed on the top of the connecting block (56).

2. The power quality detector of claim 1, wherein: The rotating rod (52) has a first screw groove (531) inside, and the first screw groove (531) is arranged in a circumferential array. The rotating block (53) has a second screw groove (533) on its side wall. A screw rod (532) is threadedly installed in the second screw groove (533), and the screw rod (532) is threadedly connected to the first screw groove (531).

3. The power quality detector of claim 2, wherein: One end of the rotating shaft (55) is fixed with a frustum (551), and the other end of the rotating shaft (55) is fixed with a plug rod (552). The side wall of the concave seat (54) is provided with a slot (553).

4. The power quality detector of claim 3, wherein: The slots (553) are arranged in a circular array. The insert rod (552) is inserted into the slot (553). The concave seat (54) has through grooves (554) on both sides. The rotating shaft (55) is slidably connected to the through grooves (554).

5. The power quality detector of claim 4, wherein: A knob (58) is installed on the outer ring of the suction cup (57).

6. The power quality detector of claim 1, wherein: The anti-detachment component (4) includes a support block (41) fixedly connected to the bottom surface of the terminal block (2). A spring (42) is fixed to the inner wall of the support block (41), and a clamping ring (43) is fixed to the other end of the spring (42). The inner wall of the clamping ring (43) is in contact with the outer wall of the wiring cable (3).

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