Electrical fireproof current-limiting protector

Abstract

The utility model relates to an electrical fireproof current-limiting protector, which is provided with a shell (1), a key switch (21) and a mistaken touch prevention device (3), the pressing end of the key switch (21) is fixedly provided with a rod body (22), and the middle part of the rod body (22) is provided with an annular groove (221); the mistaken touch prevention device (3) comprises a rotating shaft (31), a sleeve block (32) is fixed to the middle of the rotating shaft (31), a clamping groove (321) matched with the annular groove (221) is formed in the sleeve block (32), the rotating shaft (31) is sleeved with a coil spring (33), and when the sleeve block (32) is separated from the rod body (22), the coil spring (33) is tightened and applies force to the rotating shaft (31), so that the sleeve block (32) has the trend of moving towards the rod body (22). After the key switch (21) is fixed through the mistaken touch prevention device (3), a worker cannot press the key switch (21) as long as the worker does not lift the sleeve block (32), and the situation that the worker touches the key switch (21) mistakenly can be prevented.

Description

Technical Field

[0001] The utility model relates to an electrical fire prevention current limiting protector, in particular to the structure of an anti-misoperation device for an electrical fire prevention current limiting protector. Background Art

[0002] Compared with traditional protectors such as circuit breakers and air switches, the electrical fire prevention current limiting protector has the advantages of rapid response and no spark generation during cutting. The electrical fire prevention current limiting protector is a device used to limit the magnitude of the current in a circuit and prevent fires caused by excessive current. It is internally provided with a heating element that generates heat when energized, an electromagnetic element that detects current changes through electromagnetic effects, and an actuating mechanism for cutting off the circuit. When the current exceeds the set value, the heating element in the electrical fire prevention current limiting protector heats up, the electromagnetic element generates a corresponding magnetic field, triggering the actuating mechanism to act and cutting off the circuit in time to prevent fires from occurring.

[0003] However, the existing electrical fire prevention current limiting protectors lack anti-misoperation devices. Since the electrical fire prevention current limiting protector responds extremely quickly, it is easy for staff to accidentally touch the switch, resulting in serious circuit accidents and irreparable production losses. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the switch of the existing electrical fire prevention current limiting protector is prone to accidental touch.

[0005] To achieve the above purpose, the utility model provides an electrical fire prevention current limiting protector, which has a housing 1 and a key switch 21. The housing 1 is provided with a slot 2, and the key switch 21 is arranged in the slot 2.

[0006] The electrical fire prevention current limiting protector further has an anti-misoperation device 3, which is arranged in the slot 2 and includes: a rotating shaft 31, a sleeve block 32, and a coil spring 33.

[0007] The rotating shaft 31 is rotatably installed on the side of the key switch 21, and the extending direction of the center line L1 of the rotating shaft 31 is parallel to the pressing direction of the key switch 21.

[0008] The sleeve block 32 is a rectangular plate, one end of which is fixed to the middle of the rotating shaft 31 and can rotate with the rotating shaft 31. A rod body 22 is fixedly arranged at the pressing end of the key switch 21, and an annular groove 221 is arranged in the middle of the rod body 22. The sleeve block 32 is provided with a clamping groove 321, and the clamping groove 321 is matched with the annular groove 221 of the rod body 22.

[0009] The coil spring 33 is sleeved outside the rotating shaft 31. One end of the coil spring 33 is fixedly connected to the sleeve block 32, and the other end is fixedly connected to the side wall of the slot 2. When the sleeve block 32 is separated from the rod body 22, the coil spring 33 is tightened and applies a force to the rotating shaft 31, so that the sleeve block 32 has a tendency to move towards the rod body 22.

[0010] When the button switch 21 needs to be operated, the staff only needs to lift the sleeve block 32 with one hand in the state as shown Figure 3 and press the button switch 21 with the other hand. After that, release the sleeve block 32. The sleeve block 32 receives the force applied by the torsion spring 33 along the rotating shaft 31 and presses against the rod body 22. The clamping groove 321 of the sleeve block 32 clamps the annular groove 221, thereby fixing the rod body 22 and the button switch 21.

[0011] After the button switch 21 is fixed by the anti-misoperation device 3, the staff cannot press the button switch 21 without lifting the sleeve block 32, that is, the situation of misoperation can be prevented.

[0012] Preferably, an elastic rubber pad 322 is fixedly arranged inside the clamping groove 321. The elastic rubber pad 322 can play a role in anti-slip, making the anti-misoperation device 3 fix the button switch 21 more firmly.

[0013] Preferably, two parallel rod bodies 22 are fixedly arranged at the pressing end of the button switch 21. A pressing plate 23 for manual pressing is arranged at one end of the rod body 22 away from the button switch 21.

[0014] Annular grooves 221 are respectively arranged in the middle parts of the respective rod bodies 22. The sleeve block 32 is provided with two clamping grooves 321, and the two clamping grooves 321 respectively match the two annular grooves 221. This can prevent the rod body 22 from shaking and disengaging from the anti-misoperation device 3.

[0015] Preferably, the electrical fire prevention current limiting protector is further provided with a cover body 4. The cover body 4 is hinged to the shell 1 through a hinge 46. The cover body 4 can cover the surface of the shell 1 to play a role in dust prevention and protection.

[0016] Preferably, a cross block 41 is arranged on one side of the cover body 4 away from the hinge 46. Straight mounting grooves 42 are respectively arranged at both ends of the cross block 41, and latch pins 45 are arranged in the respective mounting grooves 42.

[0017] The latch pin 45 can slide along the mounting groove 42. The latch pin 45 is connected to the mounting groove 42 through a spring 43, and the spring 43 provides an outward force for the latch pin 45.

[0018] A through groove 421 is arranged on one side of the mounting groove 42. A dial 451 is fixedly arranged at one end of the latch pin 45 close to the spring 43, and the dial 451 passes through the through groove 421.

[0019] A card frame 24 matching the cross block 41 is arranged on one side of the shell 1 away from the hinge 46. The card frame 24 is provided with a slot 25 matching the latch pin 45, and the latch pin 45 can be inserted into the slot 25 in a pluggable manner.

[0020] The cover body 4 and the housing 1 are fixed by the cooperating bolt 45 and slot 25. When needed, the staff can conveniently open the cover body 4 through the paddle, which is easy to use.

[0021] Preferably, a guide rod 44 is fixedly arranged in the installation groove 42, the spring is sleeved outside the guide rod 44, a guide groove is arranged at one end of the bolt 45 connected to the spring 43, and the guide rod 44 is inserted into the guide groove, and the bolt 45 can slide along the guide rod 44.

[0022] Guiding the spring 43 and the bolt 45 by using the guide rod 44 can reduce the shearing force on them during the chemical process and reduce the situation of their wear and breakage.

[0023] Preferably, the electrical fire prevention current limiting protector is also provided with a wire harness storage device 5, and the wire harness storage device 5 includes: side plates 51, hand-tightening bolts 53, back plates 54, mounting shafts 57, and reels 58.

[0024] The side plates 51 are fixed to the side of the housing 1, are provided with at least one semi-circular groove 56, and a screw hole 52 is arranged beside the semi-circular groove 56, and the hand-tightening bolt 53 is threadedly connected to the screw hole 52.

[0025] The back plate 54 is parallel to the side plates 51 and is fixed to one side of the side plates 51 through support ribs. One end of the mounting shaft 57 is fixed to the back plate 54, and the other end is provided with a limiting block 571.

[0026] The reel 58 is rotatably sleeved outside the mounting shaft 57, the radius of the reel 58 is smaller than the radius of the semi-circular groove 56, and a uniform gap is formed between the reel 58 and the semi-circular groove 56.

[0027] The electrical fire prevention current limiting protector has a wire harness 50, the wire harness 50 passes through the gap between the reel 58 and the semi-circular groove 56 and is wound around the reel 58, and the movable end of the wire harness 50 is clamped and fixed by the hand-tightening bolt 53 and the back plate 54.

[0028] When installing and maintaining the electrical fire prevention current limiting protector daily, the wire harness 50 can be passed through the gap between the reel 58 and the semi-circular groove 56, wound around the reel 58, and then clamped and fixed by the hand-tightening bolt 53 and the back plate 54. Using the wire harness storage device 5 can prevent the exposed wire harness 50 from interfering with the staff's management and maintenance of electrical equipment.

[0029] Preferably, a positioning ring 55 is fixedly arranged between the side plates and the back plate 54, and the position of the positioning ring 55 is opposite to the hand-tightening bolt 53. Passing the movable end of the wire harness 50 through the positioning ring 55 and then clamping and fixing it by the hand-tightening bolt 53 and the back plate 54 can make the movable end of the wire harness 50 in a state convenient for hand holding, which is convenient for the staff to perform maintenance operations. Description of the Drawings

[0030] Figure 1It is a structural diagram of an electrical fire prevention current limiting protector;

[0031] Figure 2 It is a structural diagram of a key switch and an anti-misoperation device;

[0032] Figure 3 It is a state diagram when the key switch and the anti-misoperation device are separated;

[0033] Figure 4 It is a structural diagram of the cover of the electrical fire prevention current limiting protector being closed;

[0034] Figure 5 It is Figure 4 An enlarged diagram of part A in

[0035] Figure 6 It is a structural diagram of a wire harness storage device;

[0036] Reference numerals: 1 - housing; 2 - slot; 21 - key switch; 22 - rod body; 221 - annular groove; 23 - pressing plate; 24 - clamping frame; 25 - slot; 3 - anti-misoperation device; 31 - rotating shaft; 310 - bearing; 320 - connecting block; L1 - center line of the rotating shaft; 32 - sleeve block; 321 - clamping groove; 322 - elastic rubber pad; 33 - torsion spring; 4 - cover body; 41 - horizontal block; 42 - installation groove; 421 - through groove; 43 - spring; 44 - guide rod; 45 - bolt; 451 - dial; 46 - hinge; 47 - transparent window; 5 - wire harness storage device; 50 - wire harness; 51 - side plate; 52 - screw hole; 53 - hand-tightening bolt; 54 - back plate; 55 - positioning ring; 56 - semi-circular groove; 57 - installation shaft; 58 - reel; 01 - control panel. Detailed implementation mode

[0037] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings. The following description is a concretization of the claims of the present invention.

[0038] Figure 1 The structure of the electrical fire prevention current limiting protector is shown. First, the structure of the electrical fire prevention current limiting protector is briefly described as follows:

[0039] A control panel 01 is installed in the middle of the electrical fire prevention current limiting protector, and a thermal element or an electromagnetic element, an action mechanism for cutting off the circuit, and a circuit wire harness for connection are installed inside. Since these structures are prior art and have no relation to the present invention, they will not be described in detail here.

[0040] As Figure 1 shown, the electrical fire prevention current limiting protector has a housing 1, a key switch 21, an anti-misoperation device 3, a cover body 4, and a wire harness storage device 5.

[0041] A slot 2 is provided at the lower part of the housing 1, and the key switch 21 and the anti-misoperation device 3 are arranged in the slot 2 of the key switch 21.

[0042] The cover body 4 is hinged to the housing 1 through a hinge 46. A latch 45 is provided on the upper side of the cover body 4. Correspondingly, a slot 25 is provided at the lower end of the housing 1 for fixing the cover body 4 in the closed state (see Figure 4 ).

[0043] The wire harness storage device 5 is arranged on the left and right sides of the housing 1 for storing the wire harness outside the electrical fire prevention current limiting protector.

[0044] The structure of the electrical fire prevention current limiting protector will be specifically described below in conjunction with each drawing:

[0045] Figure 2 Shows the structure of the key switch 21 and the anti-misoperation device 3 (in the state of snap fixation); Figure 3 Shows the state when the key switch and the anti-misoperation device are separated.

[0046] Combined with Figures 1 to 3 Looking at it, two parallel rod bodies 22 are fixedly arranged at the pressing end of the key switch 21. An annular groove 221 is respectively arranged in the middle of each rod body 22. A pressing plate 23 for manual pressing is arranged at the end of the rod body 22 away from the key switch 21.

[0047] As Figure 2 shown, the anti-misoperation device 3 includes: a rotating shaft 31, a sleeve block 32, and a coil spring 33.

[0048] The rotating shaft 31 is rotatably installed on the side of the key switch 21 by a bearing 310. The extending direction of the center line L1 of the rotating shaft 31 is parallel to the pressing direction of the key switch 21, that is, the key switch 21 can be pressed upward, and the center line L1 of the rotating shaft 31 extends in the up and down direction.

[0049] Combined with Figure 3 Looking at it, the sleeve block 32 is a rectangular plate. One end is fixed to the middle of the rotating shaft 31 by a connecting block 320, so that the sleeve block 32 can rotate with the rotating shaft 31.

[0050] The sleeve block 32 is provided with two clamping grooves 321, and the two clamping grooves 321 respectively match the two annular grooves 221, that is, the clamping grooves 321 of the sleeve block 32 can be clamped with the annular grooves 221 to fix the rod body 22 and the key switch 21.

[0051] An elastic rubber pad 322 is fixedly arranged inside the clamping groove 321, which can play a role in anti-slip.

[0052] As Figure 2 、 3As shown, the coil spring 33 is sleeved on the outside of the rotating shaft 31 , one end of the coil spring 33 is fixedly connected to the sleeve block 32 , and the other end is fixedly connected to the side wall of the slot 2 .

[0053] like Figure 3 As shown, when an external force is applied to separate the sleeve 32 from the rod body 22, the coil spring 33 is tightened and applies force to the rotating shaft 31, so that the sleeve 32 has a tendency to move toward the rod body 22, that is, along Figure 3 When the external force is lost, the sleeve block 32 can automatically turn to the rod body 22, so that the clamping groove 321 clamps the annular groove 221, that is, the rod body 22 and the key switch 21 can be fixed.

[0054] Figure 4 The structure of the cover body of the electrical fire-proof current-limiting protector is shown; Figure 5 yes Figure 4 The enlarged illustration of part A shows the connection structure between the cover body 4 and the lower end of the shell 1.

[0055] Combination Figure 1 , Figure 4 As can be seen, the cover body 4 has a transparent window 47 which can be folded downward and covered on the surface of the shell 1 .

[0056] like Figure 1 As shown, a horizontal block 41 is provided on one side of the cover body 4 away from the hinge 46. Figure 4 As shown, both ends of the horizontal block 41 are respectively provided with straight installation grooves 42 , and each installation groove 42 is provided with a latch 45 .

[0057] The latch 45 can slide along the mounting groove 42. The latch 45 is connected to the mounting groove 42 by a spring 43. The spring 43 provides an outward force for the latch 45 so that the latch 45 has a movement tendency to extend out of the mounting groove 42. When not subject to external force, the outer end of the latch 45 extends out of the mounting groove 42.

[0058] In addition, a guide rod 44 is fixedly arranged in the installation groove 42, a spring sleeve is arranged outside the guide rod 44, and a guide groove is arranged at one end of the latch 45 connected to the spring 43. The guide rod 44 is inserted into the guide groove, and the latch 45 can slide along the guide rod 44.

[0059] A through slot 421 is provided on one side of the mounting slot 42, and a paddle 451 is fixedly provided on one end of the latch 45 close to the spring 43, and the paddle 451 passes through the through slot 421. The staff can adjust the position of the latch 45 by paddle 451.

[0060] A clamping frame 24 matching the transverse block 41 is disposed on one side of the housing 1 away from the hinge 46 , that is, when the cover 4 is covered on the housing 1 , the clamping frame 24 is located exactly at two ends of the transverse block 41 .

[0061] The card frame 24 is provided with a slot 25 that matches the bolt 45. That is, when the cover body 4 is closed on the housing 1, the card frame 24 is facing the installation groove 42, and the bolt 45 can be inserted into the slot 25 in a pluggable manner. By inserting the bolt 45 into the slot 25, the cover body 4 can be fixed to the housing 1.

[0062] Figure 6 It is a structural diagram of the wire harness storage device 5.

[0063] Combined Figure 1 、 Figure 6 Looking at it, the wire harness storage device 5 includes: side plates 51, hand-tightening bolts 53, back plates 54, mounting shafts 57, winding disks 58, and positioning rings 55.

[0064] The side plates 51 are fixed to the side of the housing 1, provided with at least one semi-circular groove 56, and a screw hole 52 is provided beside the semi-circular groove 56. The hand-tightening bolt 53 is threadedly connected to the screw hole 52.

[0065] The back plate 54 is parallel to the side plates 51 and is fixed to one side of the side plates 51 through support ribs.

[0066] One end of the mounting shaft 57 is fixed to the back plate 54, and a limiting block 571 is provided at the other end.

[0067] The winding disk 58 is rotatably sleeved outside the mounting shaft 57, and the radius of the winding disk 58 is smaller than the radius of the semi-circular groove 56, so that a uniform gap is formed between the winding disk 58 and the semi-circular groove 56.

[0068] A positioning ring 55 is fixedly arranged between the side plates and the back plate 54, and the position of the positioning ring 55 is opposite to the hand-tightening bolt 53.

[0069] The following will illustrate the usage method and beneficial effects of the electrical fire prevention current limiting protector in combination with each drawing:

[0070] When the button switch 21 needs to be operated, the staff only needs to Figure 3 lift the sleeve block 32 with one hand and press the button switch 21 with the other hand as shown in the state. After that, release the sleeve block 32, and the sleeve block 32 receives the force applied by the torsion spring 33 along the rotating shaft 31 and presses against the rod body 22. The clamping groove 321 of the sleeve block 32 is clamped with the annular groove 221, thereby fixing the rod body 22 and the button switch 21.

[0071] After the button switch 21 is fixed by the anti-misoperation device 3, the staff cannot press the button switch 21 without lifting the sleeve block 32, that is, the situation of misoperation can be prevented.

[0072] In actual situations, sometimes the staff will overlook the indicator lights on the control panel 01 and mistake the electrical fire prevention current-limiting protector for an ordinary electric meter. To find out whether the switch of the electrical fire prevention current-limiting protector has been turned on, they will randomly press the switch for testing. Therefore, the anti-misoperation device 3 can also remind the staff not to randomly touch the key switch 21.

[0073] The cover body 4 can play a role in dust prevention and protection. The cover body 4 and the housing 1 are fixed by the matching bolt pins 45 and slots 25. When needed, the staff can conveniently open the cover body 4 through the paddle, which is convenient to use.

[0074] When installing and maintaining the electrical fire prevention current-limiting protector daily, the wire harness 50 can be passed through the gap between the reel 58 and the semi-circular groove 56 and wound around the reel 58. The movable end of the wire harness 50 passes through the positioning ring 55 and is then clamped and fixed to the back plate 54 by the hand-tightening bolt 53. The wire harness storage device 5 can prevent the exposed wire harness 50 from interfering with the staff's management and maintenance of electrical equipment.

[0075] The electrical fire prevention current-limiting protector provided by the present utility model has a simple structure and an anti-misoperation function, and can solve the problem that the switch of the existing electrical fire prevention current-limiting protector is prone to misoperation.

Claims

1. Electrical fire prevention current limiting protector. The electrical fire prevention current limiting protector has a housing (1) and a push-button switch (21). The housing (1) is provided with a slot (2), and the push-button switch (21) is arranged in the slot (2). It is characterized in that It has an anti-misoperation device (3). The anti-misoperation device (3) is arranged in the slot (2) and includes: a rotating shaft (31), a sleeve block (32), and a coil spring (33). The rotating shaft (31) is rotatably installed on the side of the push-button switch (21), and the extending direction of the center line (L1) of the rotating shaft (31) is parallel to the pressing direction of the push-button switch (21). The sleeve block (32) is a rectangular plate, one end of which is fixed to the middle of the rotating shaft (31) and can rotate with the rotating shaft (31). A rod body (22) is fixedly arranged at the pressing end of the push-button switch (21). An annular groove (221) is arranged in the middle of the rod body (22). The sleeve block (32) is provided with a clamping groove (321), and the clamping groove (321) matches the annular groove (221) of the rod body (22). The coil spring (33) is sleeved outside the rotating shaft (31). One end of the coil spring (33) is fixedly connected to the sleeve block (32), and the other end is fixedly connected to the side wall of the slot (2). When the sleeve block (32) is separated from the rod body (22), the coil spring (33) is tightened and applies a force to the rotating shaft (31), so that the sleeve block (32) has a tendency to move towards the rod body (22).

2. The electrical fire prevention current limiting protector according to claim 1, wherein An elastic rubber pad (322) is fixedly arranged inside the clamping groove (321).

3. The electrical fire prevention current limiting protector according to claim 1, wherein Two parallel rod bodies (22) are fixedly arranged at the pressing end of the push-button switch (21). A pressing plate (23) for manual pressing is arranged at the end of the rod body (22) far from the push-button switch (21). Annular grooves (221) are respectively arranged in the middle of each rod body (22). The sleeve block (32) is provided with two clamping grooves (321), and the two clamping grooves (321) respectively match the two annular grooves (221).

4. The electrical fire prevention current limiting protector according to any one of claims 1 to 3, wherein The electrical fire prevention current limiting protector is also provided with a cover body (4). The cover body (4) is hinged to the housing (1) through a hinge (46), and the cover body (4) can cover the surface of the housing (1).

5. The electrical fire prevention current limiting protector according to claim 4, wherein A cross block (41) is arranged on the side of the cover body (4) far from the hinge (46). Straight installation grooves (42) are respectively arranged at both ends of the cross block (41). Plug pins (45) are arranged in each installation groove (42). The plug pins (45) can slide along the installation grooves (42). The plug pins (45) are connected to the installation grooves (42) through springs (43), and the springs (43) provide an outward force for the plug pins (45). A through groove (421) is arranged on one side of the installation groove (42). A dial (451) is fixedly arranged at the end of the plug pin (45) close to the spring (43), and the dial (451) passes through the through groove (421). On the side of the housing (1) away from the hinge (46), a card frame (24) matching the cross block (41) is provided. The card frame (24) is provided with a slot (25) matching the bolt (45), and the bolt (45) can be inserted into and pulled out of the slot (25).

6. The electrical fire prevention current limiting protector according to claim 5, characterized in that A guide rod (44) is fixedly arranged in the installation groove (42). The spring is sleeved outside the guide rod (44). One end of the bolt (45) connected to the spring (43) is provided with a guide groove. The guide rod (44) is inserted into the guide groove, and the bolt (45) can slide along the guide rod (44).

7. The electrical fire prevention current limiting protector according to any one of claims 1 to 3, characterized in that The electrical fire prevention current limiting protector is also provided with a wire harness storage device (5). The wire harness storage device (5) includes: side plates (51), hand-tightening bolts (53), a back plate (54), a mounting shaft (57), and a reel (58). The side plates (51) are fixed to the side of the housing (1), and are provided with at least one semi-circular groove (56). A screw hole (52) is provided beside the semi-circular groove (56). The hand-tightening bolt (53) is threadedly connected to the screw hole (52). The back plate (54) is parallel to the side plates (51) and is fixed to one side of the side plates (51) through support ribs. One end of the mounting shaft (57) is fixed to the back plate (54), and the other end is provided with a limiting block (571). The reel (58) is rotatably sleeved outside the mounting shaft (57). The radius of the reel (58) is smaller than the radius of the semi-circular groove (56). A uniform gap is formed between the reel (58) and the semi-circular groove (56). The electrical fire prevention current limiting protector has a wire harness (50). The wire harness (50) passes through the gap between the reel (58) and the semi-circular groove (56), and is wound around the reel (58). The movable end of the wire harness (50) is clamped and fixed by the hand-tightening bolt (53) and the back plate (54).

8. The electrical fire prevention current limiting protector according to claim 7, wherein, A positioning ring (55) is fixedly arranged between the side plates and the back plate (54). The position of the positioning ring (55) is opposite to the hand-tightening bolt (53).

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