Low-voltage switch with protection mechanism

Abstract

The invention relates to the technical field of low-voltage switch protection, in particular to a low-voltage switch with a protection mechanism, which comprises a bottom plate for mounting the low-voltage switch, a cooling fan is mounted on an abutting plate in a matched manner, a connecting mechanism for fixing a filter plate is arranged on the abutting plate, a portal frame is fixedly mounted on a protection cover, and a protective cover is fixedly mounted on the portal frame. A second driving motor is fixedly installed on the dragon frame, and a heat dissipation mechanism used for discharging heat is arranged on the protection cover. The protection cover is in contact with the abutting plate to form an independent space, so that the low-voltage switch can be effectively prevented from being damaged by external factors, a protection effect is achieved, and the service life of the low-voltage switch is prolonged; the heat dissipation fan accelerates the air circulation speed of the outer end of the low-voltage switch, and the three groups of flow guide plates swing repeatedly to disperse the discharged hot air, thereby preventing the discharged heat from being excessively concentrated, causing the deformation of adjacent parts due to heating, and preventing the use performance from being affected.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage switch protection, and in particular to a low-voltage switch with a protection mechanism. Background Art

[0002] Low-voltage switches are one of the most widely used and important electrical equipment in low-voltage power distribution systems. There are many types of them. Among them, air switches are mainly used for manual circuit breaking and have short-circuit and overload protection functions; AC contactors and other electrical appliances can form an electrical control system with an arc extinguishing chamber, which can provide overload protection but not short-circuit protection; knife switches can only disconnect small load currents. The most commonly used are knife isolating switches, which have obvious disconnection points and are also manually operated. There are also some that combine knife isolating switches with fuses or combine them into one.

[0003] In the existing field of low-voltage switch protection technology, the low-voltage switch is usually directly installed in the electrical cabinet, and there is no protective device on the outer end of the low-voltage switch. When the door of the electrical cabinet is open, external factors can easily damage the low-voltage switch, causing huge losses and posing certain safety hazards. At the same time, heat is easily accumulated around the low-voltage switch and cannot be quickly discharged. Over time, the internal temperature of the low-voltage switch will suddenly increase, affecting the performance of the low-voltage switch. In severe cases, the low-voltage switch will be damaged. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of slow heat dissipation in the prior art and to propose a low-voltage switch with a protection mechanism.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A low-voltage switch with a protective mechanism, comprising a base plate for mounting the low-voltage switch, a first drive motor fixedly mounted on one side of the base plate, a drive bevel gear matched with the output end of the first drive motor, a support block welded on one side of the base plate, a screw rod matched with the support block fixedly mounted on the drive bevel gear, a protective cover for protecting the low-voltage switch slidably mounted on the other side of the base plate, a threaded plate matched with the screw rod fixedly mounted on the protective cover;

[0007] A resistance plate is fixedly mounted on the other side of the base plate, a cooling fan is matched with the resistance plate, a filter plate is slidably mounted on the resistance plate, a connecting mechanism for fixing the filter plate is arranged on the resistance plate, a gantry is fixedly mounted on the protective cover, a second driving motor is fixedly mounted on the gantry, and a cooling mechanism for discharging heat is arranged on the protective cover.

[0008] Preferably, rectangular through holes are provided at both ends of the gantry, and the first drive motor, the lead screw and the threaded plate are on the same vertical horizontal line.

[0009] Preferably, two groups of central shafts are rotatably mounted on one side of the base plate, and driven helical gears meshing with the driving helical gears are fixedly mounted on opposite ends of the two groups of central shafts.

[0010] Preferably, the connecting mechanism includes a supporting tube welded to the contact plate, a pressing tube is slidably installed in the supporting tube, two groups of contact blocks are welded in the pressing tube, a supporting column is welded on the contact plate, a connecting column is slidably installed in the supporting column, a wedge block that contacts the contact block is slidably installed in the supporting column and the connecting column, and a strong spring is connected between the connecting column and the pressing tube.

[0011] Preferably, the wedge block is a Z-shaped structure, the two groups of the abutment blocks are ladder-shaped structures in opposite directions, and the pressing cylinder is concentrically arranged with the connecting column.

[0012] Preferably, the heat dissipation mechanism includes a transmission plate slidably mounted on the protective cover, transmission racks are fixedly mounted on both sides of the transmission plate, a transmission gear meshing with the transmission rack is rotatably mounted on the protective cover, a driven gear rotatably connected to the gantry is fixedly mounted on the transmission gear, a driving gear matched with the output end of the second driving motor and meshing with the driven gear is rotatably mounted in the gantry, three groups of guide plates are rotatably mounted on the protective cover, a curved groove is provided at the bottom end of the transmission plate, and a connecting shaft slidably connected to the curved groove is rotatably mounted on the guide plate.

[0013] Preferably, the two groups of transmission gears are fan-shaped structures, and the directions of the tooth grooves of the two groups of transmission gears are opposite.

[0014] Preferably, the three groups of guide plates are on the same horizontal line, and the three groups of guide plates are equidistantly distributed on the protective cover.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention makes the protective cover contact with the contact plate to form an independent space, which can effectively prevent external factors from causing damage to the low-voltage switch, play a protective role, and extend the service life of the low-voltage switch.

[0017] 2. The present invention accelerates the air circulation speed of the outer end of the low-voltage switch by the heat dissipation fan, and disperses the exhausted hot air through the repeated swinging of three sets of guide plates, thereby preventing the exhausted heat from being too concentrated, causing the neighboring parts to be deformed by heat and affecting their performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the structure of a low-voltage switch with a protective mechanism proposed by the present invention;

[0019] Figure 2 A side view of a low-voltage switch with a protective mechanism proposed by the present invention;

[0020] Figure 3 A cross-sectional view of a low-voltage switch with a protective mechanism proposed by the present invention;

[0021] Figure 4 A schematic diagram of the connection mechanism structure of a low-voltage switch with a protection mechanism proposed by the present invention;

[0022] Figure 5 A schematic diagram of the heat dissipation mechanism of a low-voltage switch with a protection mechanism proposed by the present invention;

[0023] Figure 6 The present invention is a bottom view of a protective cover of a low-voltage switch with a protective mechanism.

[0024] In the figure: 1. bottom plate; 2. low voltage switch; 3. first drive motor; 4. drive bevel gear; 5. support block; 6. screw rod; 7. protective cover; 8. threaded plate; 9. gantry; 10. second drive motor; 11. contact plate; 12. cooling fan; 13. filter plate; 14. center axis; 15. driven bevel gear; 16. support cylinder; 17. pressing cylinder; 18. contact block; 19. support column; 20. connecting column; 21. wedge block; 22. strong spring; 23. rectangular through hole; 24. guide plate; 25. transmission plate; 26. transmission rack; 27. transmission gear; 28. driven gear; 29. ​​driving gear; 30. curved groove; 31. connecting shaft. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1-Figure 6 A low-voltage switch with a protective mechanism comprises a base plate 1 for mounting a low-voltage switch 2, a first drive motor 3 is fixedly mounted on one side of the base plate 1, a drive bevel gear 4 is matched with the output end of the first drive motor 3, two sets of center shafts 14 are rotatably mounted on one side of the base plate 1, and driven bevel gears 15 meshingly connected with the drive bevel gear 4 are fixedly mounted on the opposite ends of the two sets of center shafts 14, the transmission efficiency between the gears is high, and the application range is wide, and the service life is long. A support block 5 is welded on one side of the base plate 1, and a screw rod 6 matched with the support block 5 is fixedly mounted on the drive bevel gear 4.

[0027] A protective cover 7 for protecting the low-voltage switch 2 is slidably installed on the other side of the base plate 1, and a threaded plate 8 matched with the screw rod 6 is fixedly installed on the protective cover 7. The screw rod 6 and the threaded plate 8 have relatively little wear during transmission, thereby extending the service life of the components and reducing the frequency and cost of maintenance and replacement of components. The transmission relationship between the two has good self-locking performance and will not fall due to gravity. The movement is stable, and the rubber pad at the contact plate 11 can achieve a noise reduction effect. The first drive motor 3, the screw rod 6 and the threaded plate 8 are on the same vertical horizontal line.

[0028] A contact plate 11 is fixedly installed on the other side of the base plate 1, and a rubber cushion is fixedly installed on the contact plate 11. The rubber cushion is a highly elastic polymer material with reversible deformation. It is elastic and can be deformed under the action of external force. It can return to its original state after the external force is removed, which can play a shock-absorbing role. It can not only reduce the noise generated, but also protect the contact surface between the contact plate 11 and the protective cover 7, thereby improving the service life of parts. A cooling fan 12 is installed on the contact plate 11, and a filter plate 13 is slidably mounted on the contact plate 11. A connecting mechanism for fixing the filter plate 13 is provided on the contact plate 11.

[0029] The connecting mechanism includes a support cylinder 16 welded on the contact plate 11, and a pressing cylinder 17 is slidably installed in the support cylinder 16. The pressing cylinder 17 can only slide in the support cylinder 16 in the up and down directions and will not rotate. Two groups of contact blocks 18 are welded in the pressing cylinder 17. The two groups of contact blocks 18 are ladder-shaped structures with opposite directions. A support column 19 is welded on the contact plate 11, and a connecting column 20 is slidably installed in the support column 19. In order to improve the smoothness of the sliding of the wedge block 21 in the connecting column 20, lubricating oil can be added between the two before the combination, which can also reduce wear and extend the service life of the parts. The pressing cylinder 17 is concentrically arranged with the connecting column 20, and the support column 19 and A wedge block 21 that contacts the resistance block 18 is slidably installed in the connecting column 20. The contact surfaces of the wedge block 21 and the resistance block 18 are relatively flat to reduce the friction between the two and improve the smoothness of movement. If necessary, lubricating oil can be added between the two. The wedge block 21 is a Z-shaped structure. A strong spring 22 is connected between the connecting column 20 and the pressing cylinder 17. The strong spring 22 is a mechanical part that uses elasticity to work. It is made of elastic material and deforms under the action of external force. It returns to its original state after the external force is removed. The strong spring 22 here always has an upward extension force to reset the connecting column 20, so that the connection between the filter plate 13 and the resistance plate 11 is more secure.

[0030] A gantry 9 is fixedly mounted on the protective cover 7, and rectangular through holes 23 are provided at both ends of the gantry 9. In order to avoid collision between the driven gear 28 and the gantry 9, the movable range of the driven gear 28 is increased by providing the rectangular through holes 23. A second drive motor 10 is fixedly mounted on the gantry 9, and a heat dissipation mechanism for dissipating heat is provided on the protective cover 7.

[0031] The heat dissipation mechanism includes a transmission plate 25 slidably mounted on the protective cover 7, and transmission racks 26 are fixedly mounted on both sides of the transmission plate 25. A transmission gear 27 meshing with the transmission rack 26 is rotatably mounted on the protective cover 7. The two groups of transmission gears 27 are fan-shaped structures. When one group of transmission gears 27 contacts the transmission rack 26, the other group does not contact the transmission rack 26, thereby controlling the transmission plate 25 to make reciprocating motion, and the directions of the tooth grooves of the two groups of transmission gears 27 are opposite. A driven gear 28 rotatably connected to the gantry 9 is fixedly mounted on the transmission gear 27. A driving gear 29 matched with the output end of the second drive motor 10 and meshing with the driven gear 28 is rotatably mounted in the gantry 9. The driving gear 2 The diameter of 9 is larger than the diameter of the driven gear 28. When the driving gear 29 rotates one circle, the driven gear 28 will be pulled to rotate one and a half circles, thereby achieving the effect of energy saving. Three groups of guide plates 24 are rotatably installed on the protective cover 7. The three groups of guide plates 24 are of the same size, and when the transmission plate 25 moves to the maximum limit, the three groups of guide plates 24 will be in a straight line to form a closed partition, and form a closed space with the contact plate 11 of the protective cover 7, which has a dust-proof effect on the low-voltage switch 2. The three groups of guide plates 24 are on the same horizontal line, and the three groups of guide plates 24 are equidistantly distributed on the protective cover 7. A curved groove 30 is provided at the bottom end of the transmission plate 25, and a connecting shaft 31 slidably connected to the curved groove 30 is rotatably installed on the guide plate 24.

[0032] It should be noted that the specific models and specifications of the first drive motor 3 and the second drive motor 10 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it is not repeated here.

[0033] The present invention can be explained by the following operation mode:

[0034] Turn on the first drive motor 3, control the screw rod 6 to rotate clockwise, and then drive the protective cover 7 to slide in the direction of the contact plate 11 through the threaded plate 8, until the protective cover 7 and the contact plate 11 are in contact and connected, and the low-voltage switch 2 is protected. At this time, the driving bevel gear 4 will drive the driven bevel gear 15 to rotate counterclockwise, and then drive the central shaft 14 to rotate, and drive the neighboring protective cover 7 to move through the driven bevel gear 15 on the other side;

[0035] Press the pressing cylinder 17 downward, and the abutment block 18 abuts against the wedge block 21, controlling the wedge block 21 to slide rightward, driving the connecting column 20 to move upward, and assembling the filter plate 13 into the abutment plate 11. Then, release the pressure on the pressing cylinder 17, and pull the connecting column 20 to reset through the strong spring 22, so that the filter plate 13 and the abutment plate 11 are connected;

[0036] The second drive motor 10 is turned on, and the drive gear 29 is controlled to rotate clockwise, thereby driving the two sets of driven gears 28 to rotate counterclockwise, thereby driving the transmission gear 27 to rotate. The two sets of transmission gears 27 are alternated with each other, and the transmission plate 25 is driven to slide back and forth on the protective cover 7 through the transmission rack 26. The connecting shaft 31 is pulled by the curved groove 30 to move, driving the three sets of guide plates 24 to swing back and forth, and the cooling fan 12 is turned on to speed up the circulation of air in the protective cover 7, and disperse the emitted heat through the swing of the guide plate 24.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-voltage switch with a protective mechanism, comprising a base plate (1) for mounting a low-voltage switch (2), characterized in that: A first drive motor (3) is fixedly mounted on one side of the base plate (1), a drive bevel gear (4) is matched with the output end of the first drive motor (3), a support block (5) is welded on one side of the base plate (1), a screw rod (6) matched with the support block (5) is fixedly mounted on the drive bevel gear (4), a protective cover (7) for protecting the low-voltage switch (2) is slidably mounted on the other side of the base plate (1), a threaded plate (8) matched with the screw rod (6) is fixedly mounted on the protective cover (7); A contact plate (11) is fixedly mounted on the other side of the bottom plate (1), a cooling fan (12) is matched with the contact plate (11), a filter plate (13) is slidably mounted on the contact plate (11), a connecting mechanism for fixing the filter plate (13) is provided on the contact plate (11), a gantry (9) is fixedly mounted on the protective cover (7), a second drive motor (10) is fixedly mounted on the gantry (9), and a cooling mechanism for discharging heat is provided on the protective cover (7).

2. A low-voltage switch with a protective mechanism according to claim 1, characterized in that: Rectangular through holes (23) are provided at both ends of the gantry (9), and the first drive motor (3), the screw rod (6) and the threaded plate (8) are on the same vertical horizontal line.

3. A low-voltage switch with a protective mechanism according to claim 1, characterized in that: Two sets of central shafts (14) are rotatably mounted on one side of the base plate (1), and driven helical gears (15) meshingly connected with the driving helical gears (4) are fixedly mounted on opposite ends of the two sets of central shafts (14).

4. A low-voltage switch with a protective mechanism according to claim 1, characterized in that: The connection mechanism comprises a support tube (16) welded to the contact plate (11), a pressing tube (17) is slidably mounted in the support tube (16), two groups of contact blocks (18) are welded in the pressing tube (17), a support column (19) is welded to the contact plate (11), a connecting column (20) is slidably mounted in the support column (19), a wedge block (21) that contacts the contact block (18) is slidably mounted in the support column (19) and the connecting column (20), and a strong spring (22) is connected between the connecting column (20) and the pressing tube (17).

5. A low-voltage switch with a protective mechanism according to claim 4, characterized in that: The wedge block (21) is a Z-shaped structure, the two groups of the abutment blocks (18) are ladder-shaped structures with opposite directions, and the pressing cylinder (17) and the connecting column (20) are arranged concentrically.

6. A low-voltage switch with a protective mechanism according to claim 1, characterized in that: The heat dissipation mechanism comprises a transmission plate (25) slidably mounted on the protective cover (7), transmission racks (26) are fixedly mounted on both sides of the transmission plate (25), a transmission gear (27) meshingly connected with the transmission rack (26) is rotatably mounted on the protective cover (7), a driven gear (28) rotatably connected with the gantry (9) is fixedly mounted on the transmission gear (27), a driving gear (29) matched with the output end of the second driving motor (10) and meshingly connected with the driven gear (28) is rotatably mounted in the gantry (9), three groups of guide plates (24) are rotatably mounted on the protective cover (7), a curved groove (30) is provided at the bottom end of the transmission plate (25), and a connecting shaft (31) slidably connected with the curved groove (30) is rotatably mounted on the guide plate (24).

7. A low voltage switch with a protection mechanism according to claim 6, characterized in that: The two groups of transmission gears (27) are fan-shaped structures, and the directions of the tooth grooves of the two groups of transmission gears (27) are opposite.

8. A low voltage switch with a protection mechanism according to claim 6, characterized in that: The three groups of guide plates (24) are on the same horizontal line, and the three groups of guide plates (24) are equidistantly distributed on the protective cover (7).

Images