Three-phase harmonic flicker analysis equipment based on test

Abstract

The utility model belongs to the technical field of harmonic flicker testing, and particularly relates to a three-phase harmonic flicker analysis device based on testing, which comprises an outer shell, the outer shell comprises a rear shell and a front cover connected to the front end part of the rear shell, a display screen, a plurality of physical keys and a plurality of wiring jacks are embedded in the front cover, and the wiring jacks are connected with the rear shell. The rear shell is hinged with the front cover from the bottom end; the limiting mechanism comprises a limiting piece, a mounting shaft and a limiting pin, the limiting piece is rotationally connected to the front cover through the mounting shaft, a guide sliding hole is machined in the limiting piece, and the limiting pin is fixed to the end of the rear shell and penetrates through the guide sliding hole; according to the utility model, the rear shell and the front cover adopt a hinged design, the use and maintenance are convenient, the problem that the lead is easy to break due to misoperation during direct disassembly is avoided, the opening angle of the front cover is limited by using the limiting mechanism, and the safety is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of harmonic flicker testing, and in particular relates to a three-phase harmonic flicker analysis device based on testing. Background Art

[0002] The third harmonic is a sinusoidal component with a frequency three times the fundamental frequency of the complex wave. Third harmonic pollution mainly exists in low-voltage distribution networks, and is most serious in building systems. Since a large number of switching power supplies are used inside electronic products, while improving power efficiency, due to nonlinear power conversion, a large amount of harmonic current will be injected into the power grid. It will not only interfere with other equipment in the same power grid, but also cause the neutral line current of the power grid to overload, affecting the power transmission capacity.

[0003] Therefore, in real life, harmonic analyzers are used to perform harmonic analysis tests on lines. Harmonic monitoring is divided into two methods: off-line monitoring and online monitoring. The off-line monitoring method uses a portable tester to test suspected harmonic sources of concern at irregular intervals. The online monitoring method generally uses a monitoring instrument as the core, and uses a computer installed with management software as the main station. The monitoring data is collected through wired (RS232 / 485) and network (RJ45) for analysis and processing, and output in the form of charts.

[0004] It was retrieved from the prior art that a Chinese utility model patent with authorization publication number CN218336946U discloses "a harmonic and voltage flicker testing device", which includes an outer shell with a cavity formed therein, and a damping seat and two fixing seats fixed to the inner wall of the cavity, a fan fixed between the two fixing seats, and a power supply, a processor, a harmonic flicker analyzer and a metal cover covering the outside of the processor and the harmonic flicker analyzer are provided on the damping seat. An air outlet is provided on the left side of the outer shell, which has high heat dissipation efficiency.

[0005] Although the flicker test devices in the prior art, including those mentioned above, have good heat dissipation efficiency and can meet general testing needs, when the instrument is repaired, because the instrument casing is usually assembled with screws, the front and rear of the casing are directly separated after removing the screws. Because the front is provided with a display screen, physical buttons, wiring sockets and other structures, and is connected to the circuit board in the casing with wires, direct disassembly can easily cause the wires to be broken due to misoperation, posing a high safety hazard.

[0006] In order to solve the above problems, the present invention proposes a three-phase harmonic flicker analysis device based on testing. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a three-phase harmonic flicker analysis device based on testing, which has the characteristics of easy use and high safety performance.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a test-based three-phase harmonic flicker analysis device, comprising an outer shell, the outer shell comprising a rear shell and a front cover connected to the front end of the rear shell, the front cover being embedded with a display screen, a plurality of physical buttons, and a plurality of wiring sockets, and further comprising:

[0009] A locking mechanism, wherein the rear shell and the front cover are hingedly connected from the bottom end, and when the rear shell and the front cover are closed, the locking mechanism is used to lock the top ends of the rear shell and the front cover;

[0010] The limiting mechanism includes a limiting plate, a mounting shaft and a limiting pin. The limiting plate is rotatably connected to the front cover by the mounting shaft, and a guide slide hole is processed on the limiting plate. The limiting pin is fixed to the end of the rear shell and passes through the guide slide hole.

[0011] As a preferred technical solution of the utility model, it also includes:

[0012] A limiting plate is fixed to an end of the limiting pin away from the rear housing.

[0013] As a preferred technical solution of the present invention, the two limiting pieces are symmetrically installed at the two ends of the front cover.

[0014] As a preferred technical solution of the present invention, the two groups of locking mechanisms are symmetrically distributed, and the locking mechanisms include:

[0015] A locking block, the locking block being fixed to the top end of the front cover and having a locking hole formed thereon;

[0016] A guide block, the guide block being fixed to the top end of the rear shell;

[0017] A square locking pin, the square locking pin passes through the guide block and is embedded in the locking hole, and the embedded end surface of the square locking pin is an inclined surface;

[0018] A No. 1 limiting ring, the No. 1 limiting ring being fixed on the square locking pin;

[0019] A return spring is sleeved on the square locking pin and is located between the guide block and the No. 1 limiting ring.

[0020] As a preferred technical solution of the present invention, the locking mechanism further includes:

[0021] A No. 2 limiting ring is fixed on the square locking pin.

[0022] As a preferred technical solution of the utility model, it also includes:

[0023] A shift block is fixed to the top end of the square locking pin.

[0024] As a preferred technical solution of the utility model, it also includes:

[0025] A handle is fixed to the top end of the rear shell.

[0026] As a preferred technical solution of the utility model, it also includes:

[0027] The two cooling fans are symmetrically fixed on the back of the rear shell, and ventilation holes are processed on the left and right sides of the rear shell.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] In the present invention, the rear shell and the front cover adopt an articulated design, which is convenient for use and maintenance, and avoids the problem of wire breaking due to misoperation during direct disassembly. The opening angle of the front cover is restricted by a limiting mechanism, which further improves safety.

[0030] Other additional advantages and beneficial effects of the present invention will be partially given in the following description, and partially become obvious from the following description, or be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural diagram of the utility model;

[0033] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure of the limiting mechanism in FIG;

[0034] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged structure of the locking mechanism;

[0035] Figure 4 This is a schematic diagram of the axonometric structure of the present invention.

[0036] In the figure: 1. Outer shell; 11. Back shell; 111. Ventilation hole; 12. Front cover; 13. Display screen; 14. Physical button; 15. Wiring socket; 2. Limiting mechanism; 21. Limiting plate; 211. Guide slide hole; 22. Mounting shaft; 23. Limiting pin; 231. Limiting disk; 3. Locking mechanism; 31. Locking block; 311. Locking hole; 32. Guide block; 33. Square locking pin; 34. Limiting ring No. 1; 35. Reset spring; 36. Limiting ring No. 2; 37. Shift block; 4. Handle; 5. Cooling fan. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 4 The utility model provides the following technical solutions: a test-based three-phase harmonic flicker analysis device, including an outer shell 1, the outer shell 1 includes a rear shell 11 and a front cover 12 connected to the front end of the rear shell 11, a display screen 13, multiple physical buttons 14 and multiple wiring sockets 15 are embedded and installed on the front cover 12, and also includes: a locking mechanism 3 and a limiting mechanism 2.

[0039] Further, by Figure 1 and Figure 2 As shown, in this embodiment, the rear shell 11 and the front cover 12 are hingedly connected from the bottom. When the rear shell 11 and the front cover 12 are closed, the locking mechanism 3 is used to lock the top of the rear shell 11 and the front cover 12. The limiting mechanism 2 includes a limiting piece 21, a mounting shaft 22 and a limiting pin 23. The limiting piece 21 is rotatably connected to the front cover 12 using the mounting shaft 22, and a guide slide hole 211 is processed on the limiting piece 21. The limiting pin 23 is fixed to the end of the rear shell 11 and passes through the guide slide hole 211. After adopting the above solution, when in use, the harmonic flicker analysis equipment uses a standard current clamp and uses a data connection line to connect the wiring socket 1 5. The current information of the circuit is collected by a standard current clamp to realize the harmonic detection of the circuit, and the detection result is displayed on the display screen 13 in the form of a waveform; the rear shell 11 and the front cover 12 of the utility model adopt a hinged design. The front cover 12 can be opened after the lock of the locking mechanism 3 is released, which is convenient for use and maintenance, and avoids the problem of direct disassembly easily breaking the wire due to misoperation. The opening angle of the front cover 12 is limited by the limiting mechanism 2, which further improves the safety. When the front cover 12 is opened, the front cover 12 drives the limiting plate 21 to move, and the guide slide hole 211 and the limiting pin 23 cooperate to limit the position.

[0040] It should be noted that the length of the guide slide hole 211 limits the opening angle of the front cover 12. The opening angle of the front cover 12 is a suitable angle determined after multiple tests, which will neither break the wires nor hinder the inspection of the components inside the outer shell 1.

[0041] It is also worth further explaining that the outer shell 1 contains components and circuit layout for realizing harmonic flicker analysis, which have been fully disclosed in the prior art and will not be described in detail herein.

[0042] Preferably, by Figure 1 and Figure 2 As shown, this embodiment also includes: a limit plate 231, which is fixed to the end of the limit pin 23 away from the rear shell 11. After adopting the above scheme, when in use, the limit plate 231 is used to limit the limit plate 21 to prevent the limit plate 21 from separating from the limit pin 23.

[0043] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, two limiting pieces 21 are symmetrically installed at both ends of the front cover 12. After adopting the above solution, when in use, the two limiting pieces 21 are used to limit the opening angle of the front cover 12 from both ends at the same time, which has higher stability.

[0044] It should be noted that, in the present invention, the limiting piece 21 has a certain elasticity, and the mounting shaft 22 is fixed to the end of the front cover 12, and the mounting shaft 22 directly passes through the limiting piece 21 to form a rotating structure. When in use, if you want to fully open the front cover 12, you can bend the limiting piece 21 outward while ensuring safety, so that the limiting piece 21 is separated from the mounting shaft 22, and the front cover 12 can be fully opened.

[0045] Optionally, by Figure 1 and Figure 3As shown, in this embodiment, the two sets of locking mechanisms 3 are symmetrically distributed, and the locking mechanism 3 includes: a locking block 31, a guide block 32, a square locking pin 33, a No. 1 limiting ring 34 and a return spring 35. The locking block 31 is fixed to the top of the front cover 12, and a locking hole 311 is processed on the locking block 31. The guide block 32 is fixed to the top of the rear shell 11. The square locking pin 33 passes through the guide block 32 and is embedded in the locking hole 311, and the embedded end surface of the square locking pin 33 is an inclined surface. The No. 1 limiting ring 34 is fixed on the square locking pin 33. The return spring 35 is sleeved on the square locking pin 33 and is located between the guide block 32 and the No. 1 limiting ring 34. After adopting the above scheme, when closing When the front cover 12 is opened, the front cover 12 drives the locking block 31 to move. Because the embedded end surface of the square locking pin 33 is an inclined surface, a component force is generated when the locking block 31 applies force to the inclined surface of the square locking pin 33, causing the square locking pin 33 to move. At this time, the return spring 35 is compressed until the locking hole 311 moves to the position of the square locking pin 33. The return spring 35 releases the elastic force to reset the square locking pin 33. The square locking pin 33 is embedded in the locking hole 311 to form a lock, ensuring the stability of the front cover 12 after it is closed; when the front cover 12 needs to be opened, the staff member moves the two square locking pins 33 inward with one hand. When the square locking pin 33 is out of the locking block 31, the other hand opens the front cover 12.

[0046] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the locking mechanism 3 also includes: a No. 2 limiting ring 36, which is fixed on the square locking pin 33. After adopting the above scheme, when in use, the No. 2 limiting ring 36 is set to limit the movement range of the square locking pin 33, thereby improving the reliability of the square locking pin 33.

[0047] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, it also includes: a shift block 37, which is fixed to the top end of the square locking pin 33. After adopting the above scheme, when in use, the set shift block 37 facilitates the staff to shift the two square locking pins 33 toward the inside to facilitate opening the front cover 12.

[0048] Preferably, by Figure 1 and Figure 4 As shown, this embodiment also includes: a handle 4, which is fixed to the top of the rear shell 11. After adopting the above solution, when in use, the scintillation analysis equipment can be easily carried by the provided handle 4, making it convenient to use in different scenarios.

[0049] Preferably, by Figure 1 and Figure 4As shown, in this embodiment, it also includes: a cooling fan 5, two cooling fans 5 are symmetrically fixed on the back of the rear shell 11, and air holes 111 are processed on the left and right sides of the rear shell 11. After adopting the above scheme, when in use, the two cooling fans 5 are started when necessary, and the two cooling fans 5 blow out cooling air, and realize cooling air circulation through the air holes 111 to dissipate heat to the internal components of the outer shell 1.

[0050] It should be noted that the cooling fan 5 is a conventional device purchased on the market with a built-in power switch. Those skilled in the art can make a conventional selection according to usage needs. Its working principle is common knowledge known to those skilled in the art and has been fully disclosed by the existing technology, so it will not be elaborated in this article.

[0051] The circuit connection involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0052] Components not described in detail herein are prior art.

[0053] Working principle and use process of the utility model: When using the three-phase harmonic flicker analysis device of the utility model, the harmonic flicker analysis device uses a standard current clamp, uses a data connection line to connect the wiring socket 15, collects the current information of the line through the standard current clamp, realizes the harmonic detection of the line, and displays the detection result in the form of a waveform on the display screen 13;

[0054] The rear shell 11 and the front cover 12 of the present invention adopt a hinged design. The front cover 12 can be opened after the locking mechanism 3 is released, which is convenient for use and maintenance, and avoids the problem of wires being easily broken due to misoperation during direct disassembly. The opening angle of the front cover 12 is limited by the limiting mechanism 2 (the working principles of the locking mechanism 3 and the limiting mechanism 2 have been introduced in detail in the above embodiment part and will not be repeated here), which further improves safety. When the front cover 12 is opened, the front cover 12 drives the limiting plate 21 to move, and the guide slide hole 211 and the limiting pin 23 cooperate to limit the position.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A test-based three-phase harmonic flicker analysis device, comprising an outer shell (1), the outer shell (1) comprising a rear shell (11) and a front cover (12) connected to the front end of the rear shell (11), a display screen (13), a plurality of physical buttons (14) and a plurality of wiring sockets (15) embedded in the front cover (12), characterized in that: Also includes: A locking mechanism (3), wherein the rear shell (11) and the front cover (12) are hingedly connected from the bottom end, and when the rear shell (11) and the front cover (12) are closed, the locking mechanism (3) is used to lock the top ends of the rear shell (11) and the front cover (12); A limiting mechanism (2), the limiting mechanism (2) comprising a limiting piece (21), a mounting shaft (22) and a limiting pin (23), the limiting piece (21) being rotatably connected to the front cover (12) by means of the mounting shaft (22), and a guide sliding hole (211) being machined on the limiting piece (21), and the limiting pin (23) being fixed to an end of the rear shell (11) and passing through the guide sliding hole (211).

2. The test-based three-phase harmonic flicker analysis device according to claim 1, characterized in that: Also includes: A limiting plate (231) is fixed to an end of the limiting pin (23) away from the rear housing (11).

3. The test-based three-phase harmonic flicker analysis device according to claim 1, characterized in that: The two limiting pieces (21) are symmetrically mounted on both ends of the front cover (12).

4. The test-based three-phase harmonic flicker analysis device according to claim 1, characterized in that: The two sets of locking mechanisms (3) are symmetrically distributed, and the locking mechanisms (3) include: A locking block (31), the locking block (31) is fixed to the top end of the front cover (12), and a locking hole (311) is machined on the locking block (31); A guide block (32), the guide block (32) being fixed to the top end of the rear shell (11); A square locking pin (33), the square locking pin (33) passes through the guide block (32) and is embedded in the locking hole (311), and the embedded end surface of the square locking pin (33) is an inclined surface; A first limiting ring (34), the first limiting ring (34) being fixed on the square locking pin (33); A return spring (35), wherein the return spring (35) is sleeved on the square locking pin (33) and is located between the guide block (32) and the first limiting ring (34).

5. The test-based three-phase harmonic flicker analysis device according to claim 4, characterized in that: The locking mechanism (3) further comprises: A second limiting ring (36), the second limiting ring (36) is fixed on the square locking pin (33).

6. The test-based three-phase harmonic flicker analysis device according to claim 4, characterized in that: Also includes: A shift block (37) is fixed to the top end of the square locking pin (33).

7. The test-based three-phase harmonic flicker analysis device according to claim 1, characterized in that: Also includes: A handle (4), the handle (4) being fixed to the top end of the rear shell (11).

8. The test-based three-phase harmonic flicker analysis device according to claim 1, characterized in that: Also includes: Cooling fans (5), two cooling fans (5) are symmetrically fixed on the back of the rear shell (11), and air holes (111) are processed on both the left and right sides of the rear shell (11).

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