An emergency cut-off device for circuit protection

Abstract

The present invention relates to the technical field of circuit protection, and particularly to an emergency cut-off device for circuit protection, including an emergency cut-off device body. A cavity is formed inside the emergency cut-off device body, and a partition plate is fixed in the middle of the cavity. An arc extinguishing box is arranged above the partition plate. A top terminal is arranged at the top of the arc extinguishing box. An upper conducting rod and a lower conducting rod for conveying current are arranged inside the arc extinguishing box. A separating device for driving the upper conducting rod and the lower conducting rod to open and close is further arranged at both ends of the conducting coil, and a protecting device for protecting the upper conducting rod is also arranged inside the arc extinguishing box. Through the cooperation of structures such as a pull rod, a pushing plate, a support column, and the movement of an insulating sleeve, the present invention protects the upper conducting rod with two insulating sleeves made of insulating materials, preventing contact between the staff and the upper conducting rod when repairing in the narrow space inside the emergency cut-off device body, reducing the maintenance cost, and improving the safety.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit protection, and particularly to an emergency cut-off device for circuit protection. Background Art

[0002] Circuit protection mainly protects the components in an electronic circuit from being damaged under conditions such as overvoltage, overcurrent, surge, electromagnetic interference, etc. Common situations that require circuit protection mainly include when there is circuit overload, the circuit temperature is too high, or the circuit has a short circuit. In the above situations, the circuit needs to be urgently disconnected to prevent a larger safety accident caused by the circuit catching fire during abnormal operation. In the prior art, an emergency cut-off device is generally installed in the circuit to be protected for automatic cut-off of the circuit in an emergency state.

[0003] Although the existing emergency cut-off device for circuit protection can utilize the characteristics of SF6 gas to achieve arc splitting and simultaneously quickly extinguish the arc, when the emergency cut-off device fails and the upper conductive rod is separated from the lower conductive rod, the upper conductive rod connected to the live wire is exposed inside the emergency cut-off device. When the upper conductive rod comes into contact with other electrical components of the emergency cut-off device or when maintenance personnel need to perform live maintenance on the emergency cut-off device, if an electrical component inside the emergency cut-off device or the maintenance personnel accidentally touches the upper conductive rod, it is not only easy to damage other electrical components, but also easy to cause electric shock to the maintenance personnel. This not only increases the maintenance cost but also poses a safety hazard. Therefore, we propose an emergency cut-off device for circuit protection. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an emergency cut-off device for circuit protection.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] An emergency cut-off device for circuit protection, comprising:

[0007] The main body of the emergency cut-off device, a cavity is formed inside the main body of the emergency cut-off device, a partition plate is fixed in the middle of the cavity, an arc extinguishing box is arranged above the partition plate, a top terminal is arranged at the top of the arc extinguishing box, and upper and lower conductive rods for conveying current are arranged inside the arc extinguishing box. The bottom of the lower conductive rod penetrates through the partition plate and is provided with a conductive coil. A bottom terminal is arranged between the conductive coil and the main body of the emergency cut-off device. The partition plate divides the cavity into a first placement cavity and a second placement cavity. The arc extinguishing box is arranged in the first placement cavity, and the conductive coil is arranged in the second placement cavity. The top of the top terminal penetrates through the main body of the emergency cut-off device and is located outside the main body of the emergency cut-off device, and the bottom of the top terminal is fixed to the top of the upper conductive rod. Connecting blocks are arranged on the opposite sides of the upper and lower conductive rods;

[0008] Separation devices for driving the upper and lower conductive rods to open and close are also arranged at both ends of the conductive coil, and a protection device for protecting the upper conductive rod is also arranged inside the arc extinguishing box;

[0009] The protection device includes two support columns fixed inside the arc extinguishing box and an inclined plate arranged on the outer wall of the lower conductive rod. Two slidable insulating sleeves are arranged on the two support columns. Concave grooves are formed in the middle of the two insulating sleeves. An adjusting mechanism is arranged between the two insulating sleeves and the lower conductive rod. The two insulating sleeves are made of insulating materials, and the height of the two insulating sleeves is greater than the height of the two connecting blocks. The two grooves are spliced to form a protective groove adapted to the upper conductive rod, and the upper conductive rod is wrapped by the two insulating sleeves;

[0010] The adjusting mechanism includes a pushing plate sleeved on the support column. A support rod is arranged at the bottom of the pushing plate. Two pull rods are hinged to the top of the outer wall of the lower conductive rod by the two support rods. Through holes adapted to the support column are formed in the lower half sections of the two pushing plates. One end of the support column penetrates through the through hole and is arranged around the connecting block of the lower conductive rod without contacting the lower conductive rod. The opposite sides of the two pushing plates are respectively fixed to the two insulating sleeves. Two bearings are arranged at both ends of the two support rods. One end of the pull rod is rotatably installed on the two support rods through the two bearings. When the lower conductive rod is separated from the upper conductive rod, the lower conductive rod moves downward, so that the lower conductive rod drives the pull rod to move, and the pull rod drives the insulating sleeve to move along the outer wall of the support column through the pushing plate, so that the two insulating sleeves are spliced to wrap the upper conductive rod.

[0011] As a preferred technical solution of the present invention, the separation device includes an iron rod disposed inside the conductive coil. Two protective sleeves are symmetrically arranged on both sides of the iron rod. Two range extension mechanisms are arranged on the opposite sides of the two protective sleeves. Two power rods are arranged on the tops of the two range extension mechanisms. Two slots adapted to the iron rod are arranged on the opposite sides of the two protective sleeves facing each other. The two ends of the iron rod are inserted into the slots. Two rectangular slots for facilitating the movement of the power rods are formed on the partition plate. The tops of the two power rods penetrate through the rectangular slots and are located in the first placement cavity. Circular grooves adapted to the iron rod are arranged on the opposite sides of the two protective sleeves facing each other.

[0012] As a preferred technical solution of the present invention, the range extension mechanism includes main racks fixed on both sides of the inner wall of the emergency cut-off device body and two side plates fixed at the ends of the protective sleeve away from the iron rod. A rotatable main gear is arranged between the two side plates. A main rack engaged with the main gear is arranged below the main gear. A rotatable adjusting wheel is also arranged above the main gear. A moving plate adapted to the adjusting wheel is arranged above the adjusting wheel. The top of the moving plate is fixed to the bottom of the power rod. One end of the main rack is provided with an extension rod, and the extension rod is fixed to the inner wall of the emergency cut-off device body. The main gear and the adjusting wheel are respectively arranged at the top and bottom of the two side plates. The adjusting wheel is arranged above the main gear. The main gear and the adjusting wheel are rotatably installed between the two side plates. A number of driving pawls adapted to the main gear are arranged on the outer wall of the adjusting wheel. The number of teeth of the main gear is greater than the number of driving pawls of the adjusting wheel, and the main gear and the adjusting wheel are meshed. A number of braking notches adapted to the driving pawls are arranged at the bottom of the moving plate. A number of the clamping plates are symmetrically arranged on the upper half of the power rod. A number of the clamping plates are symmetrically arranged at the top and bottom of the partition plate. The power rod is limited by the partition plate so that the power rod can move along the rectangular slot. The protective sleeve is driven to move by the iron rod, so that the protective sleeve pushes the main gear to move, so that the main gear and the main rack cooperate to drive the main rack to rotate, so that the main rack drives the adjusting wheel to rotate, so that the main gear drives the adjusting wheel to rotate, so that the adjusting wheel drives the power rod to move through the moving plate.

[0013] As a preferred technical solution of the present invention, two limiting plates are symmetrically arranged on the outer wall of the upper conductive rod. Two liftable main mounting blocks are arranged on the two limiting plates. Two inclined plates are hinged between the two main mounting blocks and the two power rods. The two limiting plates are fixed outside the connecting blocks on the lower conductive rod, and the axis lines of the two limiting plates and the two support columns are perpendicular to each other. One end of the two main mounting blocks away from the two limiting plates is provided with main mounting grooves. Two main rotating shafts are arranged inside the two mounting grooves. Two auxiliary mounting blocks are arranged at the tops of the two power rods. Two auxiliary mounting grooves are arranged at the tops of the two auxiliary mounting blocks. Two auxiliary rotating shafts are arranged in the two auxiliary mounting grooves. The two ends of the inclined plate are respectively rotatably mounted between the main mounting block and the power rod through the main rotating shaft and the auxiliary rotating shaft. The power rod drives the main mounting block to lift through the inclined plate, so that the main mounting block drives the upper conductive rod to lift through the limiting plate, thereby facilitating the separation of the upper conductive rod and the lower conductive rod.

[0014] As a preferred technical solution of the present invention, a convex platform extends outward from the side of the limiting plate away from the upper conductive rod, and blocking blocks are symmetrically arranged at the top and bottom of the limiting plate. A sliding groove adapted to the convex platform is arranged in the middle of the main mounting block. Through the cooperation of the sliding groove and the convex platform, the main mounting block can slide up and down in the middle of the limiting plate. The main mounting block is limited by the blocking block to prevent the main mounting block from falling off the limiting plate when sliding outside the limiting plate.

[0015] As a preferred technical solution of the present invention, a positioning sleeve is fixed on the outer wall of the protective sleeve. An adjustable telescopic rod is arranged at one end of the positioning sleeve away from the protective sleeve. A rotatable pulley is arranged at one end of the telescopic rod away from the positioning sleeve. A wheel groove adapted to the pulley is arranged on the inner wall of the emergency cut-off device body. Through the cooperation of the wheel groove and the pulley, the telescopic rod supports the protective sleeve through the positioning sleeve, so that the protective sleeve supports the iron rod. Through the cooperation of the pulley and the wheel groove, the iron rod can reciprocate inside the conductive coil.

[0016] As a preferred technical solution of the present invention, a liftable locking rod is arranged at the top of the positioning sleeve. A locking hole adapted to the locking rod is formed in the outer wall of the telescopic rod. A pulling plate is arranged at the top of the locking rod. A spring is arranged between the pulling plate and the positioning sleeve. Through the cooperation of the locking rod and the locking hole, it is convenient for people to adjust the length of the telescopic rod extending outside the positioning sleeve.

[0017] As a preferred technical solution of the present invention, the bottom of the lower conductive rod penetrates through the partition plate and is fixed with a stainless steel corrugated pipe. A positioning disc is arranged at the bottom of the stainless steel corrugated pipe. Two connecting rods are symmetrically fixed at both ends of the positioning disc. One ends of the two connecting rods away from the positioning disc are fixed to the bottom of the partition plate.

[0018] Compared with the prior art, the beneficial effects that the present invention can achieve are as follows:

[0019] 1. Through the cooperation of structures such as the pull rod, the push plate, the support column, and the movement of the insulating sleeve, after the two insulating sleeves move to the outside of the connection block of the upper conductive rod, the upper conductive rod is wrapped by the protection groove formed by splicing two grooves, and the upper conductive rod is protected by two insulating sleeves made of insulating material. This can prevent the upper conductive rod from being damaged during maintenance, and at the same time avoid damage to other electrical components inside the emergency cut-off device body by the upper conductive rod. It can also prevent staff from contacting the upper conductive rod when performing maintenance in the narrow space inside the emergency cut-off device body, not only reducing the maintenance cost but also greatly improving safety.

[0020] 2. Through the cooperation of structures such as the iron rod, the protective sleeve, the main gear, the main rack, the adjusting wheel, the moving plate, and the power rod, the elastic connection of the limit spring is replaced by a rigid connection of the extended mechanism, making the device cut off the circuit faster, with a shorter response time and higher reliability.

[0021] 3. Affected by the magnetic field of the conductive coil, the iron rod will move back and forth slightly. The iron rod drives the protective sleeve to move back and forth slightly. The protective sleeve drives the power rod to move back and forth slightly through the extended mechanism. The power rod drives the inclined plate to move back and forth, and the inclined plate drives the limit plate to slide up and down in the middle of the main mounting block. Only when the main mounting block drives the limit plate to move up and down through the blocking block will the upper conductive rod be separated from the lower conductive rod, thereby increasing the stability of the current passing through the device.

[0022] 4. By pulling the lock rod, the lock rod moves to the outside of the lock hole, separating the lock rod from the telescopic rod. Pull the telescopic rod to move, making the telescopic rod move outside the positioning sleeve, increasing the extended distance of the telescopic rod, thus facilitating the adjustment of the position of the protective sleeve and facilitating people to adjust the position of the iron rod, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a schematic structural diagram of the top terminal of the present invention;

[0025] Figure 3 is a schematic structural diagram of the arc extinguishing box of the present invention;

[0026] Figure 4 is a schematic structural diagram of the conductive coil of the present invention;

[0027] Figure 5 is a schematic structural diagram of the stainless steel bellows of the present invention;

[0028] Figure 6 Structural schematic diagram of the protection device of the present invention;

[0029] Figure 7 Structural schematic diagram of the separation device of the present invention;

[0030] Figure 8 Structural schematic diagram of the power rod of the present invention;

[0031] Figure 9 Structural schematic diagram of the positioning sleeve of the present invention;

[0032] Figure 10 Structural schematic diagram of the telescopic rod of the present invention;

[0033] Figure 11 Structural schematic diagram of the propulsion plate of the present invention;

[0034] Figure 12 For the present invention Figure 6 Partial enlarged structural schematic diagram at position A in.

[0035] Wherein: 1. Emergency cut-off device body; 2. Upper conductive rod; 3. Lower conductive rod; 4. Top wiring terminal; 5. Arc extinguishing box; 6. Bottom wiring terminal; 7. Conductive coil; 8. Separation device; 9. Protection device; 10. Stainless steel bellows; 801. Iron rod; 802. Protective sleeve; 803. Main gear; 804. Main rack; 805. Adjusting wheel; 806. Moving plate; 807. Power rod; 808. Side plate; 809. Positioning sleeve; 810. Telescopic rod; 811. Pulley; 812. Locking rod; 901. Insulating sleeve; 902. Inclined plate; 903. Limiting plate; 904. Main mounting block; 905. Propulsion plate; 906. Support column; 907. Pull rod. Specific embodiments

[0036] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0037] Embodiment: The present invention provides an emergency cut-off device for circuit protection as shown in Figure 1 and includes:

[0038] The main body 1 of the emergency cut-off device has a cavity formed inside it. A partition plate is fixed in the middle of the cavity. Above the partition plate is an arc extinguishing box 5. At the top of the arc extinguishing box 5 is a top terminal 4. Inside the arc extinguishing box 5 are an upper conducting rod 2 and a lower conducting rod 3 for transmitting current. At the bottom of the lower conducting rod 3, a conducting coil 7 is provided through the partition plate. Between the conducting coil 7 and the main body 1 of the emergency cut-off device is a bottom terminal 6. The partition plate divides the cavity into a first placement cavity and a second placement cavity. The arc extinguishing box 5 is arranged in the first placement cavity, and the conducting coil 7 is arranged in the second placement cavity. The top of the top terminal 4 passes through the main body 1 of the emergency cut-off device and is located outside the main body 1 of the emergency cut-off device, and the bottom of the top terminal 4 is fixed to the top of the upper conducting rod 2. Connecting blocks are provided on the opposite sides of the upper conducting rod 2 and the lower conducting rod 3.

[0039] As can be seen from the above, during use, the live wire is connected to the top terminal 4, and the bottom terminal 6 is connected to the subsequent circuit. After the current passes through the upper conducting rod 2 and the lower conducting rod 3, it flows into the stainless steel bellows 10, and then flows out from the bottom terminal 6 through the conducting coil 7.

[0040] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 11 and Figure 12 As shown in

[0041] The protection device 9 includes two support columns 906 fixed inside the arc extinguishing box 5 and an inclined plate 902 arranged on the outer wall of the lower conducting rod 3. Two slidable insulating sleeves 901 are provided on the two support columns 906. Concave grooves are formed in the middle of the two insulating sleeves 901. An adjusting mechanism is provided between the two insulating sleeves 901 and the lower conducting rod 3. The two insulating sleeves 901 are made of insulating materials, and the height of the two insulating sleeves 901 is greater than the height of the two connecting blocks. The two grooves are spliced to form a protective groove adapted to the upper conducting rod 2, and the upper conducting rod 2 is wrapped by the two insulating sleeves 901.

[0042] The adjusting mechanism includes a pushing plate 905 sleeved on a support column 906. A support rod is arranged at the bottom of the pushing plate 905. Two support rods are hinged to the top of the outer wall of the lower conductive rod 3 by two pull rods 907. Through holes adapted to the support column 906 are formed in the lower half sections of the two pushing plates 905. One end of the support column 906 penetrates through the through hole and is arranged around the connecting block of the lower conductive rod 3 without contacting the lower conductive rod 3. The opposite sides of the two pushing plates 905 are respectively fixed to two insulating sleeves 901. Two bearings are arranged at both ends of the two support rods. One end of the pull rod 907 is rotatably installed on the two support rods through the two bearings. When the lower conductive rod 3 is separated from the upper conductive rod 2, the lower conductive rod 3 moves downward, so that the lower conductive rod 3 drives the pull rod 907 to move, and the pull rod 907 drives the insulating sleeve 901 to move along the outer wall of the support column 906 through the pushing plate 905, so that the two insulating sleeves 901 are spliced to wrap the upper conductive rod 2.

[0043] By adopting the above technical solution:

[0044] During use, when the circuit is cut off, the upper conductive rod 2 and the lower conductive rod 3 are separated. The lower conductive rod 3 moves downward, and the lower conductive rod 3 drives the pull rod 907 to move downward, so that the pull rod 907 rotates around the support rod through the bearing, and the support rod drives the pushing plate 905 to move. The pushing plate 905 is limited by the support column 906, so that the pushing plate 905 moves along the outer wall of the support column 906, and the pushing plate 905 pushes the insulating sleeve 901 to move. After the two insulating sleeves 901 move to the outside of the connecting block of the upper conductive rod 2, the upper conductive rod 2 is wrapped by the protective groove formed by splicing the two grooves. The upper conductive rod 2 is protected by the two insulating sleeves 901 made of insulating materials, which can prevent the upper conductive rod 2 from being damaged during maintenance, and at the same time can avoid the upper conductive rod 2 from damaging other electrical components inside the emergency cut-off device body 1. It can also prevent the staff from contacting the upper conductive rod 2 during maintenance in the narrow space inside the emergency cut-off device body 1, which not only reduces the maintenance cost, but also greatly improves the safety.

[0045] Secondly, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 9As shown, the separation device 8 includes an iron rod 801 disposed inside the conductive coil 7. Two protective sleeves 802 are symmetrically arranged on both sides of the iron rod 801. Two range extension mechanisms are arranged on the opposite sides of the two protective sleeves 802. Two power rods 807 are arranged on the tops of the two range extension mechanisms. Slots adapted to the iron rod 801 are arranged on the opposite sides of the two protective sleeves 802 facing each other. Both ends of the iron rod 801 are inserted into the slots. Two rectangular slots for facilitating the movement of the power rods 807 are formed on the partition plate. The tops of the two power rods 807 penetrate through the rectangular slots and are located in the first placement cavity. Circular slots adapted to the iron rod 801 are arranged on the opposite sides of the two protective sleeves 802 facing each other.

[0046] The range extension mechanism includes main racks 804 fixed to both sides of the inner wall of the emergency cut-off device body 1 and two side plates 808 fixed to the ends of the protective sleeves 802 away from the iron rod 801. A rotatable main gear 803 is arranged between the two side plates 808. A main rack 804 engaged with the main gear 803 is arranged below the main gear 803. A rotatable adjusting wheel 805 is further arranged above the main gear 803. A moving plate 806 adapted to the adjusting wheel 805 is arranged above the adjusting wheel 805. The top of the moving plate 806 is fixed to the bottom of the power rod 807. One end of the main rack 804 is provided with an extension rod, and the extension rod is fixed to the inner wall of the emergency cut-off device body 1. The main gear 803 and the adjusting wheel 805 are respectively arranged on the top and bottom of the two side plates 808. The adjusting wheel 805 is arranged above the main gear 803. The main gear 803 and the adjusting wheel 805 are rotatably installed between the two side plates 808. A number of driving pawls adapted to the main gear 803 are arranged on the outer wall of the adjusting wheel 805. The number of teeth of the gear teeth of the main gear 803 is greater than the number of driving pawls of the adjusting wheel 805. The main gear 803 and the adjusting wheel 805 are meshed and connected. A number of braking notches adapted to the driving pawls are arranged on the bottom of the moving plate 806. A number of clamping plates are symmetrically arranged on the upper half of the power rod 807. The number of clamping plates is symmetrically arranged on the top and bottom of the partition plate. The power rod 807 is limited by the partition plate so that the power rod 807 can move along the rectangular slot. The protective sleeve 802 is driven to move by the iron rod 801, so that the protective sleeve 802 pushes the main gear 803 to move, so that the main gear 803 cooperates with the main rack 804 to drive the main rack 804 to rotate, so that the main rack 804 drives the adjusting wheel 805 to rotate, so that the main gear 803 drives the adjusting wheel 805 to rotate, so that the adjusting wheel 805 drives the power rod 807 to move through the moving plate 806.

[0047] On the outer wall of the upper conductive rod 2, two limiting plates 903 are symmetrically arranged. On the two limiting plates 903, two liftable main mounting blocks 904 are arranged. Between the two main mounting blocks 904 and the two power rods 807, two inclined plates 902 are hinged. The two limiting plates 903 are fixed outside the connecting blocks on the lower conductive rod 3, and the axis lines of the two limiting plates 903 and the two support columns 906 are perpendicular to each other. One end of the two main mounting blocks 904 away from the two limiting plates 903 is provided with main mounting grooves. Inside the two mounting grooves, two main rotating shafts are arranged. At the tops of the two power rods 807, two secondary mounting blocks are arranged. At the tops of the two secondary mounting blocks, two secondary mounting grooves are arranged. Inside the two secondary mounting grooves, two secondary rotating shafts are arranged. The two ends of the inclined plate 902 are respectively rotatably mounted between the main mounting block 904 and the power rod 807 through the main rotating shaft and the secondary rotating shaft. The power rod 807 drives the main mounting block 904 to lift through the inclined plate 902, so that the main mounting block 904 drives the upper conductive rod 2 to lift through the limiting plate 903, thus facilitating the separation of the upper conductive rod 2 and the lower conductive rod 3.

[0048] By adopting the above technical solutions:

[0049] During use, when the current passing through the conductive coil 7 is too large, the conductive coil 7 will drive the iron rod 801 to move a greater distance, causing the iron rod 801 to push the protective sleeve 802 to move. The protective sleeve 802 drives the side plate 808 to move, and the side plate 808 drives the main gear 803 to move. The main gear 803 cooperates with the main rack 804, causing the main gear 803 to rotate. The main gear 803 drives the adjusting wheel 805 meshing with it to rotate. The adjusting wheel 805 drives the moving plate 806 to move, causing the moving plate 806 to drive the power rod 807 to move, the power rod 807 to drive the secondary mounting block to move, the secondary mounting block to drive the inclined plate 902 to move, the inclined plate 902 to drive the main mounting block 904 to move downward, the main mounting block 904 to drive the lower conductive rod 3 to move downward through the limiting plate 903, and the lower conductive rod 3 to be separated from the upper conductive rod 2. By using the tooth ratio of the main gear 803 and the adjusting wheel 805, the distance that the adjusting wheel 805 drives the moving plate 806 to move is increased. The rigid connection of the main gear 803, the main rack 804, the adjusting wheel 805, the moving plate 806 and the power rod 807 is used to replace the elastic connection of the limiting spring, making the time to cut off the circuit faster, the response time shorter, and the reliability higher.

[0050] Again, refer to Figure 11 and Figure 12As shown in the figure, a boss extends outward from the side of the limit plate 903 away from the upper conductive rod 2, and blocking blocks are symmetrically arranged at the top and bottom of the limit plate 903. A chute adapted to the boss is provided in the middle of the main mounting block 904. Through the cooperation of the chute and the boss, the main mounting block 904 can slide up and down in the middle of the limit plate 903. The main mounting block 904 is limited by the blocking blocks to prevent the main mounting block 904 from falling off the limit plate 903 when sliding outside the limit plate 903.

[0051] A stainless steel bellows 10 is fixed to the bottom of the lower conductive rod 3 after passing through the partition plate. A positioning disk is arranged at the bottom of the stainless steel bellows 10, and two connecting rods are symmetrically fixed at both ends of the positioning disk. One ends of the two connecting rods away from the positioning disk are fixed to the bottom of the partition plate.

[0052] By adopting the above technical solutions:

[0053] During use, when an alternating current is applied to the conductive coil 7, the iron rod 801 is affected by the magnetic field of the conductive coil 7, causing the iron rod 801 to move back and forth slightly. The iron rod 801 drives the protective sleeve 802 to move back and forth slightly. The protective sleeve 802 drives the power rod 807 to move back and forth slightly through the range extension mechanism. The power rod 807 drives the inclined plate 902 to move back and forth. The inclined plate 902 drives the limit plate 903 to slide up and down in the middle of the main mounting block 904. Only when the main mounting block 904 drives the limit plate 903 to move up and down through the blocking blocks, will the upper conductive rod 2 and the lower conductive rod 3 be separated, thereby increasing the stability of the current passing through the device.

[0054] Finally, referring to Figure 9 and Figure 10 As shown in the figure, a positioning sleeve 809 is fixed to the outer wall of the protective sleeve 802. An adjustable telescopic rod 810 is arranged at one end of the positioning sleeve 809 away from the protective sleeve 802. A rotatable pulley 811 is arranged at one end of the telescopic rod 810 away from the positioning sleeve 809. A wheel groove adapted to the pulley 811 is arranged on the inner wall of the emergency cut-off device body 1. Through the cooperation of the wheel groove and the pulley 811, the telescopic rod 810 supports the protective sleeve 802 through the positioning sleeve 809, enabling the protective sleeve 802 to support the iron rod 801. Through the cooperation of the pulley 811 and the wheel groove, the iron rod 801 can reciprocate inside the conductive coil 7.

[0055] A liftable locking rod 812 is arranged at the top of the positioning sleeve 809. A locking hole adapted to the locking rod 812 is formed on the outer wall of the telescopic rod 810. A pull plate is arranged at the top of the locking rod 812. A spring is arranged between the pull plate and the positioning sleeve 809. Through the cooperation of the locking rod 812 and the locking hole, it is convenient for people to adjust the length of the telescopic rod 810 extending outside the positioning sleeve 809.

[0056] By adopting the above technical solution:

[0057] During use, pull the lock rod 812 to move the lock rod 812 to the outside of the lock hole, separate the lock rod 812 from the telescopic rod 810, and pull the telescopic rod 810 to move, so that the telescopic rod 810 moves to the outside of the positioning sleeve 809, increasing the extended distance of the telescopic rod 810, thereby facilitating the adjustment of the position of the protective sleeve 802 and facilitating people to adjust the position of the iron rod 801, which is convenient and fast.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. An emergency cut-off device for circuit protection, characterized in that, Including: An emergency cut-off device body (1), a cavity is formed inside the emergency cut-off device body (1), a partition plate is fixed in the middle of the cavity, an arc extinguishing box (5) is arranged above the partition plate, a top wiring terminal (4) is arranged at the top of the arc extinguishing box (5), an upper conducting rod (2) and a lower conducting rod (3) for transmitting current are arranged inside the arc extinguishing box (5), the bottom of the lower conducting rod (3) penetrates through the partition plate and is provided with a conducting coil (7), and a bottom wiring terminal (6) is arranged between the conducting coil (7) and the emergency cut-off device body (1); Both ends of the conducting coil (7) are further provided with a separating device (8) for driving the upper conducting rod (2) and the lower conducting rod (3) to open and close, and a protecting device (9) for protecting the upper conducting rod (2) is further arranged inside the arc extinguishing box (5); The protecting device (9) includes two support columns (906) fixed inside the arc extinguishing box (5) and an inclined plate (902) arranged on the outer wall of the lower conducting rod (3), two slidable insulating sleeves (901) are arranged on the two support columns (906), grooves are formed by inward depression in the middle of the two insulating sleeves (901), and an adjusting mechanism is arranged between the two insulating sleeves (901) and the lower conducting rod (3); The adjusting mechanism includes a pushing plate (905) sleeved on the support column (906), a support rod is arranged at the bottom of the pushing plate (905), two pull rods (907) are hinged to the top of the outer wall of the lower conducting rod (3) by the two support rods, and through holes adapted to the support column (906) are formed in the lower half sections of the two pushing plates (905).

2. The emergency cut-off device for circuit protection according to claim 1, characterized in that, The separating device (8) includes an iron rod (801) arranged inside the conducting coil (7), two protective sleeves (802) are symmetrically arranged on both sides of the iron rod (801), two extending mechanisms are arranged on the opposite sides of the two protective sleeves (802), and two power rods (807) are arranged at the tops of the two extending mechanisms.

3. An emergency cut-off device for circuit protection according to claim 2, characterized in that, The extending mechanism includes main racks (804) fixed on both sides of the inner wall of the emergency cut-off device body (1) and two side plates (808) fixed at one end of the protective sleeve (802) away from the iron rod (801), a rotatable main gear (803) is arranged between the two side plates (808), the main gear (803) is arranged below and meshed with the main rack (804), a rotatable adjusting wheel (805) is further arranged above the main gear (803), a moving plate (806) adapted to the adjusting wheel (805) is arranged above the adjusting wheel (805), and the top of the moving plate (806) is fixed to the bottom of the power rod (807).

4. An emergency cut-off device for circuit protection according to claim 1, characterized in that, Two limiting plates (903) are symmetrically arranged on the outer wall of the upper conducting rod (2), two liftable main mounting blocks (904) are arranged on the two limiting plates (903), and two inclined plates (902) are hinged between the two main mounting blocks (904) and the two power rods (807).

5. An emergency cut-off device for circuit protection according to claim 4, characterized in that, One side of the limiting plate (903) away from the upper conductive rod (2) extends outward to form a boss, and blocking blocks are symmetrically arranged at the top and bottom of the limiting plate (903). A chute adapted to the boss is provided in the middle of the main mounting block (904).

6. An emergency cut-off device for circuit protection according to claim 3, characterized in that, A positioning sleeve (809) is fixed to the outer wall of the protective sleeve (802). One end of the positioning sleeve (809) away from the protective sleeve (802) is provided with an adjustable telescopic rod (810). One end of the telescopic rod (810) away from the positioning sleeve (809) is provided with a rotatable pulley (811). A wheel groove adapted to the pulley (811) is provided on the inner wall of the emergency cut-off device body (1).

7. An emergency cut-off device for circuit protection according to claim 6, characterized in that, A liftable locking rod (812) is provided at the top of the positioning sleeve (809). A locking hole adapted to the locking rod (812) is formed in the outer wall of the telescopic rod (810).

8. An emergency cut-off device for circuit protection according to claim 1, characterized in that, The bottom of the lower conductive rod (3) penetrates through the partition plate and is fixed with a stainless steel bellows (10). A positioning disc is arranged at the bottom of the stainless steel bellows (10). Two connecting rods are symmetrically fixed at both ends of the positioning disc. One ends of the two connecting rods away from the positioning disc are fixed to the bottom of the partition plate.

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