Open-type load switch

Abstract

The utility model discloses an open-type load switch, which relates to the technical field of open-type load switches and comprises a porcelain bottom plate, a first connecting seat, an adapter seat, a connecting frame, a knife switch, a porcelain handle and a second connecting seat. The first connecting base, the adapter base and the second connecting base are fixedly connected to the inner wall, located in the strip-shaped groove, of the porcelain bottom plate, the connecting frame is fixedly connected to the upper surface of the adapter base, the knife switch is hinged to the inner wall of the top end of the connecting frame, and the porcelain handle is fixedly connected to the end, away from the connecting frame, of the knife switch. When a circuit is overheated, mercury in the induction box absorbs heat and expands in volume, the sliding plate can be pushed to slide along the inner wall of the induction box, the ejector rod can be pushed to move upwards, the power connection plate is separated along the contact position, the ejector rod is arranged to be a magnetic rod, and the insulation effect is achieved. And after the power connection plate is jacked open, the circuit can be timely disconnected for protection processing.

Description

Technical Field

[0001] This utility model relates to the field of openable load switch technology, and specifically to an openable load switch. Background Technology

[0002] Open-type load switches, also known as rubber-covered porcelain-base knife switches, have the advantages of simple structure, low price, and convenient use and maintenance. They are mainly used as distribution switches for branch circuits and control switches for resistor and lighting circuits. They can also be used to control the infrequent starting of small-capacity motors.

[0003] In existing technologies, to ensure the safety of open-type load switches, fuses are installed inside the switches for circuit protection. When a circuit fault occurs, the fuse breaks due to temperature rise, thus disconnecting the circuit and providing protection. However, fuses are consumables and cannot be reused after breakage, requiring removal and replacement, which is inconvenient. Therefore, this application designs an open-type load switch. Utility Model Content

[0004] In view of the problems existing in the current open-type load switch, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an open-type load switch, which solves the problem that fuses are consumables and cannot be reused after breakage, requiring disassembly and replacement, which is inconvenient.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An openable load switch includes a ceramic base plate, a first connecting seat, an adapter seat, a connecting frame, a knife switch, a ceramic handle, and a second connecting seat. The ceramic base plate has multiple slots on its top inner wall. The first connecting seat, the adapter seat, and the second connecting seat are fixedly connected to the inner walls of the slots on the ceramic base plate. The connecting frame is fixedly connected to the upper surface of the adapter seat. The knife switch is hinged to the top inner wall of the connecting frame. The ceramic handle is fixedly connected to the end of the knife switch facing away from the connecting frame. The side wall of the knife switch contacts the second connecting seat. Wires are connected to the inner walls of the first connecting seat and the adapter seat. A junction plate is fixedly connected to one end of each of the two wires, and the two junction plates are in contact. A sensor box is fixed to the inner wall of the ceramic base plate at the gap between the first connecting seat and the adapter seat.

[0008] Preferably, a fixing plate is fixedly connected to the side wall of the first connecting seat and the adapter seat respectively, and a fixing rod is fixedly connected to the side wall of the fixing plate. The end of the power receiving plate away from the wire is rotatably sleeved on the rod wall of the fixing rod.

[0009] Preferably, a torsion spring is sleeved on the wall of the fixing rod, one end of the torsion spring is fixedly connected to the inner wall of the junction plate, and the other end of the torsion spring is fixedly connected to the wall of the fixing rod.

[0010] Preferably, the bottom inner wall of the sensor box is filled with mercury, a sliding plate is slidably provided on the inner wall of the sensor box, the bottom of the sliding plate is pressed against the upper surface of the mercury, and a top rod is fixedly connected to the top of the sliding plate. The top wall of the top rod extends through the sensor box to the bottom of the junction board.

[0011] Preferably, a plurality of heat-conducting fins are fixedly connected to the side wall of the sensing box, the heat-conducting fins extend into the interior of the sensing box, and an arc-shaped elastic strip is fixedly connected to the inner wall of the top of the sensing box, the bottom of the arc-shaped elastic strip being pressed against the upper surface of the slide plate.

[0012] Preferably, the two wires are respectively connected through the contact plate.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. In this utility model, when the circuit overheats, the mercury inside the induction box absorbs heat and expands in volume, which can push the sliding plate along the inner wall of the induction box and push the top rod to move upward, so that the contact plate separates at the contact position. The top rod is set as a magnetic rod, which has an insulating effect. After the contact plate is pushed open, the circuit can be disconnected in time for protection.

[0015] 2. In this utility model, after the subsequent circuit repair, the mercury cools and shrinks, which can cause the top rod to retract, allowing the contact plate to re-engage and enabling the open-type load switch to be used repeatedly and stably, avoiding the need for replacement after the fuse breaks.

[0016] 3. In this utility model, the torsion spring can make the junction plate rotate along the wall of the fixed rod to generate a swing force, thereby improving the reset effect of the junction plate. The heat-conducting fins can improve the sensing efficiency of the induction box and make the mercury more sensitive to the expansion reaction of temperature. The arc-shaped elastic strip will generate a thrust on the slide plate, which will facilitate the subsequent reset of the slide plate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a front view of the structure of this utility model;

[0019] Figure 2This is a top-down view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of part A;

[0021] Figure 4 For the present utility model Figure 1 A schematic diagram of the structure of the connecting seat and the adapter seat.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Ceramic base plate; 2. First connecting seat; 3. Adapter seat; 4. Connecting frame; 5. Knife switch; 6. Ceramic handle; 7. Second connecting seat; 8. Wire; 9. Fixing plate; 10. Fixing rod; 11. Torsion spring; 12. Connecting plate; 13. Induction box; 14. Mercury; 15. Slide plate; 16. Top rod; 17. Heat-conducting fins; 18. Arc-shaped elastic strip. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses an openable load switch.

[0026] This utility model provides, for example Figure 1-4 An openable load switch is shown, comprising a ceramic base plate 1, a first connecting seat 2, an adapter seat 3, a connecting frame 4, a knife switch 5, a ceramic handle 6, and a second connecting seat 7. The inner wall of the top of the ceramic base plate 1 has multiple slots. The first connecting seat 2, the adapter seat 3, and the second connecting seat 7 are fixedly connected to the inner wall of the slots on the ceramic base plate 1. The connecting frame 4 is fixedly connected to the upper surface of the adapter seat 3. The knife switch 5 is hinged to the inner wall of the top of the connecting frame 4. The ceramic handle 6 is fixedly connected to the end of the knife switch 5 facing away from the connecting frame 4. The side wall of the knife switch 5 contacts the second connecting seat 7. Wires 8 are connected to the inner walls of the first connecting seat 2 and the adapter seat 3, respectively. A grounding plate 12 is fixedly connected to one end of each of the two wires 8, and the two grounding plates 12 are in contact. An induction box 13 is fixed to the inner wall of the ceramic base plate 1 at the gap between the first connecting seat 2 and the adapter seat 3. The two wires 8 pass through the grounding plates 12 and are in contact.

[0027] The bottom inner wall of the sensor box 13 is filled with mercury 14. A slide plate 15 is slidably mounted on the inner wall of the sensor box 13. The bottom of the slide plate 15 is pressed against the upper surface of the mercury 14. A top rod 16 is fixedly connected to the top of the slide plate 15. The top wall of the top rod 16 extends through the sensor box 13 to the bottom of the power supply board 12.

[0028] A fixing plate 9 is fixedly connected to the side wall of the first connecting seat 2 and the adapter seat 3 respectively. A fixing rod 10 is fixedly connected to the side wall of the fixing plate 9. The end of the connecting plate 12 facing away from the wire 8 is rotatably sleeved on the rod wall of the fixing rod 10.

[0029] In use, the first connecting seat 2 connects the adapter seat 3 and the connecting frame 4 via the wire 8 and the connecting plate 12. The swinging ceramic handle 6 can drive the switch 5 and the second connecting seat 7 to make contact, which can connect the circuit and ensure the normal use of the open load switch. When the circuit overheats, the mercury 14 inside the induction box 13 absorbs heat and expands in volume, which can push the slide plate 15 to slide along the inner wall of the induction box 13. This can push the top rod 16 to move upward, causing the connecting plate 12 to separate at the contact position. The connecting plate 12 rotates and is sleeved on the wall of the fixed rod 10, which can ensure the stability during rotation. The top rod 16 is set as a magnetic rod with an insulating effect. After the connecting plate 12 is pushed open, it can ensure that the circuit is disconnected in time for protection. After the circuit is repaired, the mercury 14 cools down and shrinks, which can cause the top rod 16 to retract, allowing the connecting plate 12 to re-contact. This allows the open load switch to be used repeatedly and stably, avoiding the need for replacement after the fuse breaks.

[0030] To improve the sensing efficiency of the sensing box 13, such as Figure 1-4 As shown, a torsion spring 11 is sleeved on the wall of the fixed rod 10. One end of the torsion spring 11 is fixedly connected to the inner wall of the junction plate 12, and the other end of the torsion spring 11 is fixedly connected to the wall of the fixed rod 10. Multiple heat-conducting fins 17 are fixedly connected to the side wall of the sensing box 13. The heat-conducting fins 17 extend into the interior of the sensing box 13. An arc-shaped elastic strip 18 is fixedly connected to the inner wall of the top of the sensing box 13. The bottom of the arc-shaped elastic strip 18 is pressed against the upper surface of the slide plate 15.

[0031] The torsion spring 11 can cause the junction plate 12 to rotate along the wall of the fixed rod 10 to generate a swing force, thereby improving the reset effect of the junction plate 12. The heat-conducting fins 17 can improve the sensing efficiency of the sensing box 13 and make the mercury 14 more sensitive to the expansion reaction of temperature. The arc-shaped elastic strip 18 will generate a thrust on the slide plate 15, which will facilitate the subsequent reset of the slide plate 15.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An openable load switch, comprising a porcelain base plate (1), a first connecting seat (2), an adapter seat (3), a connecting frame (4), a knife switch (5), a porcelain handle (6), and a second connecting seat (7), characterized in that, The inner wall of the top of the ceramic base plate (1) is provided with multiple strip grooves. The first connecting seat (2), the adapter seat (3), and the second connecting seat (7) are respectively fixedly connected to the inner wall of the ceramic base plate (1) located in the strip groove. The connecting frame (4) is fixedly connected to the upper surface of the adapter seat (3). The switch (5) is hinged to the inner wall of the top of the connecting frame (4). The ceramic handle (6) is fixedly connected to the end of the switch (5) away from the connecting frame (4). The side wall of the switch (5) is in contact with the second connecting seat (7). The inner walls of the first connecting seat (2) and the adapter seat (3) are respectively connected with wires (8). The corresponding ends of the two wires (8) are respectively fixedly connected with a power plate (12). The two power plates (12) are in contact. The inner wall of the ceramic base plate (1) located at the gap between the first connecting seat (2) and the adapter seat (3) is fixed with an induction box (13).

2. The openable load switch according to claim 1, characterized in that, A fixing plate (9) is fixedly connected to the side wall of the first connecting seat (2) and the adapter seat (3), and a fixing rod (10) is fixedly connected to the side wall of the fixing plate (9). The end of the connecting plate (12) facing away from the wire (8) is rotatably sleeved on the rod wall of the fixing rod (10).

3. The openable load switch according to claim 2, characterized in that, A torsion spring (11) is sleeved on the wall of the fixed rod (10). One end of the torsion spring (11) is fixedly connected to the inner wall of the junction plate (12), and the other end of the torsion spring (11) is fixedly connected to the wall of the fixed rod (10).

4. The openable load switch according to claim 1, characterized in that, The bottom inner wall of the sensor box (13) is filled with mercury (14), and a sliding plate (15) is slidably provided on the inner wall of the sensor box (13). The bottom of the sliding plate (15) is pressed against the upper surface of the mercury (14), and a top rod (16) is fixedly connected to the top of the sliding plate (15). The top wall of the top rod (16) extends through the sensor box (13) to the bottom of the power supply board (12).

5. The openable load switch according to claim 4, characterized in that, Multiple heat-conducting fins (17) are fixedly connected to the side wall of the sensing box (13). The heat-conducting fins (17) extend into the interior of the sensing box (13). An arc-shaped elastic strip (18) is fixedly connected to the inner wall of the top of the sensing box (13). The bottom of the arc-shaped elastic strip (18) is pressed against the upper surface of the slide plate (15).

6. The openable load switch according to claim 1, characterized in that, The two wires (8) are respectively connected through the junction plate (12).

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