Small integrated portable relay protection test teaching device

Abstract

The utility model discloses a small integrated portable relay protection test teaching device, which comprises a box body, a reset button and a reclosing mode switching handle are arranged on the front side of the box body, a rectifier bridge and a line differential protection device are arranged in the box body, and an operation surface and a display surface of the line differential protection device are both positioned on the front side of the box body. A bottom protection plate is arranged at the bottom of the box body, universal wheels are arranged at the bottom of the bottom protection plate, a front protection plate with the lower end hinged to the bottom protection plate is arranged on the front side of the box body, a rear protection plate with the lower end hinged to the bottom protection plate is arranged on the rear side of the box body, a top protection plate is arranged above the box body, the front side of the top protection plate is hinged to the front protection plate, and the rear side of the top protection plate is hinged to the rear protection plate; a first positioning assembly is arranged between the front protective plate and the top protective plate; a second positioning assembly is arranged between the top protection plate and the rear protection plate; and a connecting mechanism in a separated state is arranged between the box body and the front protective plate. The utility model has the advantages of difficult failure and convenient use.

Description

Technical Field

[0001] The utility model relates to a small integrated portable relay protection test teaching device. Background Art

[0002] In hydropower plants, new relay protection employees need to be trained. One of the training contents is to use relay protection test teaching devices (referred to as teaching devices) to simulate various line faults, so that employees can have a deeper understanding of the working principles of line protection, overcome the short construction period and long cycle during on-site operations, the lack of experience and poor technical level of technical personnel, and human factors that cause omissions, missing items, work delays, etc., and at the same time improve the staff's ability to handle faults, maintenance quality and work efficiency, and facilitate technical training and summary.

[0003] The existing teaching device includes a box body, a plurality of universal wheels are provided at the bottom of the box body, a reset button and a reclosing mode switching handle are provided on the front side of the box body, a protection pressure plate, a terminal block, a DC circuit breaker, a rectifier bridge and a line differential protection device are provided in the box body, and the operation surface and display surface of the line differential protection device are on the front side of the box body.

[0004] The teaching device is used in conjunction with a relay. The relay outputs a variable AC voltage to the line differential protection device in the teaching device, causing the line differential protection device to generate fault information and take corresponding actions to trip the corresponding simulated circuit breaker to which it is connected. At the same time, the line differential protection device can also transmit the fault information to a computer and printer.

[0005] Existing teaching devices are distributed to various hydropower plants for rotational use, requiring frequent transportation. During transportation, components such as the reset button and reclosing mode switch handle protrude from the exterior of the frame box, making them susceptible to damage and potentially causing device malfunctions. Furthermore, finding suitable packaging materials during each transport process can be challenging. Furthermore, the low height of the teaching device makes it difficult for staff to operate it during teaching, requiring them to find something like a table to elevate it. This creates significant inconvenience. Utility Model Content

[0006] The purpose of the utility model is to provide a small integrated portable relay protection test teaching device. The utility model has the advantages of being resistant to failure and easy to use.

[0007] The technical solution of the utility model is: a small integrated portable relay protection test teaching device, comprising a box body, a reset button and a reclosing mode switching handle are provided on the front side of the box body, a rectifier bridge and a line differential protection device are provided in the box body, and an operation surface and a display surface of the line differential protection device are both located on the front side of the box body, characterized in that: a bottom guard plate is provided at the bottom of the box body, four to six universal wheels are provided at the bottom of the bottom guard plate, a front guard plate is provided at the front side of the box body, a rear guard plate is provided at the rear side of the box body, a top guard plate is provided above the box body, the front side of the top guard plate is hinged to the front guard plate, and the rear side of the top guard plate is hinged to the rear guard plate;

[0008] A first positioning assembly is provided between the front guard plate and the top guard plate, the first positioning assembly comprising a first slide groove located at the front end of the top guard plate, a second slide groove located at the upper end of the front guard plate, and two first slide plates located at the front and rear sides of the front guard plate, respectively. A first connecting plate is provided between the two first slide plates and passes through the second slide groove.

[0009] A second positioning assembly is provided between the top guard plate and the rear guard plate, the second positioning assembly comprising a third slide groove located at the rear end of the top guard plate, a fourth slide groove located at the upper end of the rear guard plate, and two second slide plates located at the front and rear sides of the top guard plate, respectively. A second connecting plate is provided between the two second slide plates and passes through the third slide groove.

[0010] A connection mechanism in a separated state is provided between the box body and the front guard plate.

[0011] In the aforementioned small-scale integrated portable relay protection test teaching device, there are two of each of the first positioning components and the second positioning components.

[0012] In the aforementioned small-scale integrated portable relay protection test teaching device, the first positioning component has two first sliding grooves and two second sliding grooves, and the second positioning component has two third sliding grooves and two fourth sliding grooves.

[0013] In the aforementioned small integrated portable relay protection test teaching device, the width of the first slide is 1.5-2 times the distance between the two second slide grooves, and the width of the second slide is 1.5-2 times the distance between the two third slide grooves.

[0014] In the aforementioned small integrated portable relay protection test teaching device, the connecting mechanism includes a first plug-in located on the inner side of the front guard plate and a second plug-in located on the rear side of the box body. The upper end of the first plug-in is fixed to the front guard plate, and both ends of the second plug-in are fixed to the box body. A socket that cooperates with the first plug-in is formed between the second plug-in and the box body.

[0015] In the aforementioned small integrated portable relay protection test teaching device, side guard plates are provided on both sides of the box body, the bottom guard plate and the rear guard plate are fixed to the side guard plates, and a fence plate located on the front side of the box body is provided between the two side guard plates. The fence plate is close to the bottom guard plate, and the front guard plate is connected to the fence plate lock.

[0016] In the aforementioned small integrated portable relay protection test teaching device, handle mechanisms are provided on the left and right sides and the top of the box, and first through holes corresponding to the positions of the corresponding handle mechanisms are provided on the top guard plate and the side guard plates.

[0017] In the aforementioned small-scale integrated portable relay protection test teaching device, the handle mechanism includes a second through hole located on the side wall of the box and a mounting plate located inside the box. The mounting plate covers the second through hole, and the mounting plate is fixed to the box. A handle located in the second through hole is provided on the outside of the mounting plate. The handle is U-shaped, and both ends of the handle are rotatably connected to the mounting plate. The upper sides of both ends of the handle are provided with limit plates fixed to the mounting plate.

[0018] In the aforementioned small integrated portable relay protection test teaching device, a pin close to the front guard plate is provided on the top surface of the side guard plate, and a notch cooperating with the pin is provided on the bottom surface of the top guard plate.

[0019] Compared with the existing technology, the present invention adds a front guard plate, a rear guard plate, and a top guard plate to the existing teaching device. During transportation, the teaching device can be effectively protected to prevent the fragile parts of the teaching device from being bumped and malfunctioning. At the same time, during teaching, by flipping the front guard plate and the top guard plate and hanging the box on the front guard plate, the height of the teaching device can be effectively increased, making it easier to use. Therefore, the present invention has the advantages of being less prone to malfunction and easy to use.

[0020] By optimizing the structure of the positioning components between the guard plates, the connection strength between the guard plates after locking is increased, making them less prone to deformation and thus having a longer service life. By optimizing the structure of the handle mechanism, the handle can be hidden, which not only prevents the handle from being damaged by bumps, but also reduces the size. By limiting the maximum upward tilt angle of the handles on both sides of the box by limiting the limit, the hands are prevented from being pinched when lifting the teaching device, and the use is safe. In addition, through further structural optimization, the utility model also has the advantages of being smaller in size and basically not affecting the original portability, and has a greater structural strength and a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model in the transport state.

[0022] Figure 2 It is a schematic diagram of the use of the utility model in the front view direction in the teaching state.

[0023] Figure 3 It is a schematic diagram of the use of the utility model in the rear view direction in the teaching state.

[0024] Figure 4 yes Figure 2 Enlarged view at point A.

[0025] Figure 5 This is a diagram of the box connected to the front guard.

[0026] The marks in the accompanying drawings are: 1-box, 2-reset button, 3-reclosing mode switching handle, 4-line differential protection device, 5-bottom guard plate, 6-universal wheel, 7-front guard plate, 8-rear guard plate, 9-top guard plate, 10-first slide, 11-second slide, 12-first slide plate, 13-first connecting plate, 14-third slide, 15-fourth slide, 16-second slide, 17-second connecting plate, 18-first plug, 19-second plug, 20-jack, 21-side guard plate, 22-enclosing plate, 23-first through hole, 24-second through hole, 25-mounting plate, 26-handle, 27-limiting plate, 28-pin, 29-slot. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0028] Example. Small integrated portable relay protection test teaching device, such as Figure 1 As shown, it includes a box body 1, the front side of which is provided with a reset button 2 and a reclosing mode switching handle 3. A rectifier bridge and a line differential protection device 4 are provided inside the box body 1. The operation panel and display panel of the line differential protection device 4 are both located on the front side of the box body 1. The features are as follows:

[0029] The bottom of the box body 1 is provided with a bottom guard plate 5, and the bottom of the bottom guard plate 5 is provided with four universal wheels 6. The front side of the box body 1 is provided with a front guard plate 7, the lower end of which is hinged to the bottom guard plate 5. The rear side of the box body 1 is provided with a rear guard plate 8, the lower end of which is hinged to the bottom guard plate 5. The top of the box body 1 is provided with a top guard plate 9, the front side of the top guard plate 9 is hinged to the front guard plate 7, and the rear side of the top guard plate 9 is hinged to the rear guard plate 8.

[0030] Two first positioning assemblies are provided between the front guard plate 7 and the top guard plate 9. These assemblies include two first chutes 10 located at the front end of the top guard plate 9, two second chutes 11 located at the upper end of the front guard plate 7, and two first slides 12 located at the front and rear sides of the front guard plate 7, respectively. A first connecting plate 13 is provided between the two first slides 12, passing through the second chutes 11. The two first chutes 10 are aligned with the two second chutes 11, respectively. The width of the first slide 12 is 1.5-2 times the distance between the two second chutes 11, so that the first slide 12 covers the second chutes 11.

[0031] Two second positioning assemblies are provided between the top guard plate 9 and the rear guard plate 8. These assemblies include two third chutes 14 at the rear end of the top guard plate 9, two fourth chutes 15 at the upper end of the rear guard plate 8, and two second slides 16, one on each side of the top guard plate 8. A second connecting plate 17 is provided between the two second slides 16, passing through the third chutes 14. The two third chutes 14 are aligned with the two fourth chutes 15, respectively. The width of the second slide 16 is 1.5-2 times the distance between the two third chutes 14, ensuring that the second slide 16 covers the third chutes 14.

[0032] A separate connection mechanism is provided between the housing 1 and the front guard plate 7. The connection mechanism comprises a first insert 18 located inside the front guard plate 7 and a second insert 19 located at the rear side of the housing 1. The upper end of the first insert 18 is fixed to the front guard plate 7, while both ends of the second insert 19 are fixed to the housing 1. A socket 20 is formed between the second insert 19 and the housing 1 to mate with the first insert 18.

[0033] The box body 1 is provided with side guard plates 21 on both the left and right sides. The bottom guard plate 5 and the rear guard plate 8 are both fixed to the side guard plates 21. A panel 22 is provided between the two side guard plates 21, located at the front side of the box body 1. The panel 22 is close to the bottom guard plate 5, and the front guard plate 7 is connected to the panel 22 with a lock (the lock is omitted in the figure). The panel 22 increases the strength of the side guard plates 21 against lateral impact and provides a fulcrum for fixing the front guard plate 7.

[0034] The left and right sides and the top of the box body 1 are provided with handle mechanisms, and the top guard plate 9 and the side guard plates 21 are provided with first through holes 23 corresponding to the positions of the corresponding handle mechanisms.

[0035] The handle mechanism includes a second through-hole 24 located on the side wall of the box body 1 and a mounting plate 25 located within the box body 1. The mounting plate 25 covers the second through-hole 24 and is fixed to the box body 1. A handle 26 is provided on the outside of the mounting plate 25 and is located within the second through-hole 24. The handle 26 is U-shaped, and both ends of the handle 26 are rotatably connected to the mounting plate 25. For the handles 26 located on the left and right sides of the box body, a limit plate 27 is provided on the upper side of each end of the handle, which is fixed to the mounting plate 25. The limit plate 27 limits the maximum upward tilt angle of the handle to prevent the hand from being pinched.

[0036] The top surface of the side guard plate 21 is provided with a pin 28 close to the front guard plate 7, and the bottom surface of the top guard plate 9 is provided with a notch 29 that cooperates with the pin 28. The pin 28 increases the strength of the top guard plate against lateral impact.

[0037] As a further preference, a buffer layer such as a rubber plate or a sponge plate can be provided on the inner side of the front guard plate 7 to further prevent damage to the components on the front side of the box body 1. In further optimization, a buffer layer can also be provided on the inner side of the side guard plate, the top guard plate and the rear guard plate, and the buffer layer thickness can be 0.5 cm.

[0038] How to use: Figure 1 As shown, it is in a state not used for teaching, such as storage and transportation. When transported manually, the universal wheels at the bottom can be used for easy forward movement. When encountering obstacles such as steps, the entire device can be lifted by the top handle with one hand, or by holding the handles on both sides with both hands, making it easy to move.

[0039] When teaching, open the lock, open the lock between the front guard plate 7 and the enclosure 22, flip the front guard plate 7 upwards, flip the top guard plate 9 upwards, so that the front guard plate 7, the top guard plate 9 and the rear guard plate 8 are in the same plane, move the first positioning assembly and the second positioning assembly downwards, so that the front guard plate 7, the top guard plate 9 and the rear guard plate 8 are fixed in the same plane, lift the box body 1 by the handle on the top of the box body 1, pass the first plug piece 18 on the front guard plate 7 through the socket 20, and hang the box body 1 on the front guard plate 7. The height of the box body 1 increases, and the height from the ground is about 80 cm, which is convenient for teaching and operation.

Claims

1. A small integrated portable relay protection test teaching device, comprising a box (1), a reset button (2) and a reclosing mode switching handle (3) are provided on the front side of the box (1), a rectifier bridge and a line differential protection device (4) are provided in the box (1), and an operation surface and a display surface of the line differential protection device (4) are both located on the front side of the box (1), characterized in that: The bottom of the box body (1) is provided with a bottom guard plate (5), the bottom of the bottom guard plate (5) is provided with four to six universal wheels (6), the front side of the box body (1) is provided with a front guard plate (7) whose lower end is hinged to the bottom guard plate (5), the rear side of the box body (1) is provided with a rear guard plate (8) whose lower end is hinged to the bottom guard plate (5), and the top of the box body (1) is provided with a top guard plate (9), the front side of the top guard plate (9) is hinged to the front guard plate (7), and the rear side of the top guard plate (9) is hinged to the rear guard plate (8); A first positioning assembly is provided between the front guard plate (7) and the top guard plate (9), the first positioning assembly comprising a first slide groove (10) located at the front end of the top guard plate (9), a second slide groove (11) located at the upper end of the front guard plate (7), and two first slide plates (12) respectively located at the front and rear sides of the front guard plate (7), and a first connecting plate (13) passing through the second slide groove (11) is provided between the two first slide plates (12); A second positioning assembly is provided between the top guard plate (9) and the rear guard plate (8), the second positioning assembly comprising a third slide groove (14) located at the rear end of the top guard plate (9), a fourth slide groove (15) located at the upper end of the rear guard plate (8), and two second slide plates (16) respectively located at the front and rear sides of the top guard plate (9), a second connecting plate (17) passing through the third slide groove (14) is provided between the two second slide plates (16); A connection mechanism in a separated state is provided between the box body (1) and the front guard plate (7).

2. The small integrated portable relay protection test teaching device according to claim 1 is characterized by: There are two first positioning components and two second positioning components.

3. The small integrated portable relay protection test teaching device according to claim 1 is characterized by: The first positioning component has two first sliding grooves (10) and two second sliding grooves (11), and the second positioning component has two third sliding grooves (14) and two fourth sliding grooves (15).

4. The small integrated portable relay protection test teaching device according to claim 3 is characterized by: The width of the first slide plate (12) is 1.5-2 times the distance between the two second slide grooves (11), and the width of the second slide plate (16) is 1.5-2 times the distance between the two third slide grooves (14).

5. The small integrated portable relay protection test teaching device according to claim 1 is characterized in that: The connecting mechanism comprises a first plug-in piece (18) located on the inner side of the front guard plate (7) and a second plug-in piece (19) located on the rear side of the box body (1); the upper end of the first plug-in piece (18) is fixed to the front guard plate (7); both ends of the second plug-in piece (19) are fixed to the box body (1); and a socket (20) that cooperates with the first plug-in piece (18) is formed between the second plug-in piece (19) and the box body (1).

6. The small integrated portable relay protection test teaching device according to claim 1 is characterized by: The box body (1) is provided with side guard plates (21) on both the left and right sides, the bottom guard plate (5) and the rear guard plate (8) are fixed to the side guard plates (21), a panel (22) located at the front side of the box body (1) is provided between the two side guard plates (21), the panel (22) is close to the bottom guard plate (5), and the front guard plate (7) is connected to the panel (22) by a lock.

7. The small integrated portable relay protection test teaching device according to claim 6 is characterized by: The left and right sides and the top of the box body (1) are both provided with handle mechanisms, and the top guard plate (9) and the side guard plate (21) are both provided with first through holes (23) corresponding to the positions of the corresponding handle mechanisms.

8. The small integrated portable relay protection test teaching device according to claim 7 is characterized in that: The handle mechanism comprises a second through hole (24) located on the side wall of the box body (1) and a mounting plate (25) located in the box body (1), the mounting plate (25) covers the second through hole (24), the mounting plate (25) is fixed to the box body (1), a handle (26) located in the second through hole (24) is provided on the outside of the mounting plate (25), the handle (26) is U-shaped, both ends of the handle (26) are rotatably connected to the mounting plate (25), and the upper sides of both ends of the handle (26) are provided with a limit plate (27) fixed to the mounting plate (25).

9. The small integrated portable relay protection test teaching device according to claim 6 is characterized by: A pin (28) close to the front guard plate (7) is provided on the top surface of the side guard plate (21), and a notch (29) matched with the pin (28) is provided on the bottom surface of the top guard plate (9).

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