Emergency cut-off device for circuit protection

Abstract

The invention relates to the technical field of circuit protection, in particular to an emergency cut-off device for circuit protection, which comprises an emergency cut-off device body, a groove cavity is formed in the emergency cut-off device body, a partition plate is fixed in the middle of the groove cavity, and an arc extinguishing box is arranged above the partition plate. A top wiring 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 in the arc extinguishing box, separating devices for driving the upper conducting rod and the lower conducting rod to be opened and closed are further arranged at the two ends of the conducting coil, and a protection device for protecting the upper conducting rod is further arranged in the arc extinguishing box. Through cooperation of the pull rod, the pushing plate, the supporting column, insulation sleeve moving structures and the like, the upper conducting rod is protected by the two insulation sleeves made of the insulation materials, the situation that a worker makes contact with the upper conducting rod during maintenance in a narrow space in the emergency cut-off device body is prevented, the maintenance cost is reduced, and safety is improved.

Description

Technical Field

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

[0002] Circuit protection is mainly to protect the components in the electronic circuit from being damaged by overvoltage, overcurrent, surge, electromagnetic interference, etc. Common situations that require circuit protection are when the circuit is overloaded, the circuit temperature is too high, or the circuit is short-circuited. In all of the above situations, the circuit needs to be disconnected urgently to prevent the circuit from continuing to operate under abnormal conditions, causing the circuit to catch fire and cause greater safety accidents. In the prior art, an emergency disconnection device is generally installed in the circuit that needs protection for automatic disconnection of the circuit in an emergency.

[0003] Although the existing emergency cut-off device for circuit protection can achieve arc segmentation and rapid arc extinguishing by utilizing the characteristics of SF6 gas, when the emergency cut-off device fails, the upper conductive rod is separated from the lower conductive rod, and the upper conductive rod connected to the live wire is exposed inside the emergency cut-off device. When the upper conductive rod contacts other electrical components of the emergency cut-off device or maintenance personnel need to perform live maintenance on the emergency cut-off device, the electrical components in the emergency cut-off device or the maintenance personnel accidentally touch the upper conductive rod, which is not only easy to cause damage to other electrical components, but also easy to cause electric shock to the maintenance personnel, thereby not only increasing the maintenance cost, but also posing 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 disconnection device for circuit protection.

[0005] In order 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] An emergency shut-off device body, wherein a slot cavity is provided inside the emergency shut-off device body, a partition plate is fixed in the middle of the slot cavity, an arc extinguishing box is provided above the partition plate, a top wiring terminal is provided on the top of the arc extinguishing box, an upper conductive rod and a lower conductive rod for transmitting current are provided inside the arc extinguishing box, a conductive coil is provided at the bottom of the lower conductive rod passing through the partition plate, a bottom wiring terminal is provided between the conductive coil and the emergency shut-off device body, the partition plate divides the slot cavity into a first placement cavity and a second placement cavity, the arc extinguishing box is provided in the first placement cavity, the conductive coil is provided in the second placement cavity, the top of the top wiring terminal passes through the emergency shut-off device body and is located outside the emergency shut-off device body, and the bottom of the top wiring terminal is fixed to the top of the upper conductive rod, and connecting blocks are provided on the sides of the upper conductive rod and the lower conductive rod facing each other;

[0008] The two ends of the conductive coil are also provided with a separation device for driving the upper conductive rod and the lower conductive rod to open and close, and the arc extinguishing box is also provided with a protection device for protecting the upper conductive rod;

[0009] The protection device comprises 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, the middle parts of the two insulating sleeves are recessed inward to form a groove, an adjustment mechanism is arranged between the ends of the two inclined plates away from the power rod and the lower conductive rod, the two insulating sleeves are made of insulating material, 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 mounted on the supporting column, a supporting rod is provided at the bottom of the pushing plate, two pulling rods are hingedly connected to the top of the two supporting rods and the top of the top terminal, a through hole matched with the supporting column is opened in the lower half of the two pushing plates, one end of the supporting column passes through the through hole and is arranged around the connecting block of the lower conductive rod and does not contact the lower conductive rod, the facing sides of the two pushing plates are respectively fixed to the two insulating sleeves, two bearings are provided at both ends of the two supporting rods, one end of the pulling rod is rotatably mounted on the two supporting 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 moves by driving the pulling rod, so that the pulling rod drives the insulating sleeve to move along the outer wall of the supporting 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 arranged inside the conductive coil, two protective covers are symmetrically arranged on both sides of the iron rod, two range-extending mechanisms are arranged on the opposite sides of the two protective covers, two power rods are arranged on the tops of the two range-extending mechanisms, slots adapted to the iron rod are arranged on the opposite sides of the two protective covers, both ends of the iron rod are inserted into the slots, two rectangular grooves are provided on the partition plate for facilitating the movement of the power rods, the tops of the two power rods pass through the rectangular grooves and are located in the first placement cavity, and circular grooves adapted to the iron rod are provided on the opposite sides of the two protective covers.

[0012] As a preferred technical solution of the present invention, the range-extending mechanism includes main racks fixed on both sides of the inner wall of the emergency cutting device body and two side plates fixed at the end of the protective cover away from the iron rod, a rotatable main gear is arranged between the two side plates, a main rack meshing with the main gear is arranged below the main gear, a rotatable adjusting wheel is arranged above the main gear, a movable plate adapted to the adjusting wheel is arranged above the adjusting wheel, the top of the auxiliary rack is fixed to the bottom of the power rod, an extension rod is arranged at one end of the main rack, the extension rod is fixed to the inner wall of the emergency cutting 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, and the outer wall of the adjusting wheel A plurality of driving pawls matched with the main gear are provided, the number of teeth of the main gear is greater than the number of driving pawls of the adjusting wheel, and the main gear is connected to the adjusting wheel by a belt, and a plurality of braking grooves matched with the driving pawls are provided at the bottom of the movable plate, and a plurality of the clamping plates are symmetrically provided on the upper half of the power rod, and the plurality of the clamping plates are symmetrically provided at the top and bottom of the partition plate, and the power rod is limited by the partition plate so that the power rod can move along the rectangular groove, and the protective cover is driven to move by the iron rod, so that the protective cover pushes the main gear to move, so that the main gear cooperates with the main rack to drive the main rack to rotate, so that the main rack drives the adjusting wheel to rotate, and the main gear drives the adjusting wheel to rotate, so that the adjusting wheel drives the power rod to move through the secondary rack.

[0013] As a preferred technical solution of the present invention, two limit plates are symmetrically arranged on the outer wall of the upper conductive rod, two limit plates are arranged on the two limit plates, two inclined plates are hinged between the two main mounting blocks and the two power rods, the two limit plates are fixed to the outside of the connecting block on the lower conductive rod, and the two limit plates are perpendicular to the axial center lines of the two support columns, a main mounting groove is arranged at one end of the two main mounting blocks away from the two limit plates, two main rotating shafts are arranged inside the two mounting grooves, two auxiliary mounting blocks are arranged on the top of the two power rods, two auxiliary mounting grooves are arranged on the top of the two auxiliary mounting blocks, two auxiliary rotating shafts are arranged in the two auxiliary mounting grooves, two ends of the inclined plate are rotatably installed between the main mounting block and the power rod through the main rotating shaft and the auxiliary rotating shaft respectively, the power rod drives the main mounting block to rise and fall through the inclined plate, so that the main mounting block drives the upper conductive rod to rise and fall through the limit 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, the limit plate extends outward from one side of the upper conductive rod to form a boss, and blocking blocks are symmetrically arranged on the top and bottom of the limit plate, and a sliding groove matched with the boss is arranged in the middle of the main mounting block. Through the cooperation of the sliding groove and the boss, the main mounting block can slide up and down in the middle of the limit plate, and the main mounting block is limited by the blocking block to prevent the main mounting block from falling off the limit plate when sliding on the outside of the limit plate.

[0015] As a preferred technical solution of the present invention, a positioning sleeve is fixed to the outer wall of the protective sleeve, an adjustable telescopic rod is provided at one end of the positioning sleeve away from the protective sleeve, a rotatable pulley is provided at one end of the telescopic rod away from the positioning sleeve, and a wheel groove matched with the pulley is provided on the inner wall of the emergency cutting device body. Through the cooperation of the wheel groove and the pulley, the telescopic rod supports the protective sleeve through the positioning sleeve, and the protective sleeve supports the iron rod. Through the cooperation of the pulley and the wheel groove, the iron rod can move back and forth inside the conductive coil.

[0016] As a preferred technical solution of the present invention, a liftable locking rod is provided on the top of the positioning sleeve, a locking hole matched with the locking rod is provided on the outer wall of the telescopic rod, a pull plate is provided on the top of the locking rod, and a spring is provided between the pull plate and the positioning sleeve. Through the cooperation between the locking rod and the locking hole, people can adjust the length of the outside of the positioning sleeve extended by the telescopic rod.

[0017] As a preferred technical solution of the present invention, a stainless steel bellows is fixed to the bottom of the lower conductive rod after passing through the partition plate, and the bottom positioning plate of the stainless steel bellows has two connecting rods symmetrically fixed at both ends of the positioning plate, and the ends of the two connecting rods away from the positioning plate are fixed to the bottom of the partition plate.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] 1. Through the coordination of the pull rod, the push plate, the support column, the moving insulating sleeve and other structures, the two insulating sleeves are moved to the outside of the connecting block of the upper conductive rod, and then the upper conductive rod is wrapped by a protective groove composed of two grooves. The upper conductive rod is protected by two insulating sleeves made of insulating materials, which can prevent the upper conductive rod from being damaged during maintenance, and at the same time, it can prevent the upper conductive rod from damaging other electrical components inside the emergency cutting device body. It can also prevent the staff from contacting the upper conductive rod when performing maintenance in the narrow space inside the emergency cutting device body, which not only reduces the maintenance cost, but also greatly improves safety.

[0020] 2. Through the coordination of the iron rod, protective cover, main gear, main rack, adjusting wheel, auxiliary rack and power rod, the rigid connection of the range-extending mechanism replaces the elastic connection of the limit spring, so that the device can cut off the circuit faster, have a shorter response time and higher reliability.

[0021] 3. The iron rod is affected by the magnetic field of the conductive coil, so that the iron rod will move back and forth slightly, and the iron rod drives the protective cover to move slightly forward and backward. The protective cover drives the power rod to move slightly forward and backward through the range-extending mechanism, and the power rod drives the inclined plate to move forward and backward. 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, the upper conductive rod and the lower conductive rod will be separated, thereby increasing the stability of the current passing through the device.

[0022] 4. By pulling the lock rod, the lock rod is moved to the outside of the lock hole, the lock rod is separated from the telescopic rod, and the telescopic rod is pulled to move, so that the telescopic rod moves to the outside of the positioning sleeve, and the extension distance of the telescopic rod is increased, so that it is convenient to adjust the position of the protective cover and people can adjust the position of the iron rod, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0028] Figure 6 It is a structural schematic diagram of the protection device of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the separation device of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the power rod of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the positioning sleeve of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the telescopic rod of the present invention;

[0033] Fig.11 It is a structural schematic diagram of the propulsion plate of the present invention;

[0034] Fig.12 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point A in the middle.

[0035] Wherein: 1. Emergency shut-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 cover; 803. Main gear; 804. Main rack; 805. Adjusting wheel; 806. Auxiliary rack; 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. Pushing plate; 906. Support column; 907. Pull rod. DETAILED DESCRIPTION

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

[0037] Embodiment: The present invention provides as Figure 1 An emergency disconnection device for circuit protection is shown, comprising:

[0038] An emergency shut-off device body 1 is provided with a slot cavity inside the emergency shut-off device body 1, a partition plate is fixed in the middle of the slot cavity, an arc extinguishing box 5 is arranged above the partition plate, a top wiring terminal 4 is arranged on the top of the arc extinguishing box 5, an upper conductive rod 2 and a lower conductive rod 3 for transmitting current are arranged inside the arc extinguishing box 5, a conductive coil 7 is arranged at the bottom of the lower conductive rod 3 penetrating the partition plate, a bottom wiring terminal 6 is arranged between the conductive coil 7 and the emergency shut-off device body 1, the partition plate divides the slot cavity into a first placement cavity and a second placement cavity, the arc extinguishing box 5 is arranged in the first placement cavity, the conductive coil 7 is arranged in the second placement cavity, the top of the top wiring terminal 4 penetrates the emergency shut-off device body 1 and is located outside the emergency shut-off device body 1, and the bottom of the top wiring terminal 4 is fixed to the top of the upper conductive rod 2, and connecting blocks are arranged on the sides of the upper conductive rod 2 and the lower conductive rod 3 facing each other.

[0039] As can be seen from the above, when in 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 conductive rod 2 and the lower conductive rod 3, it flows into the stainless steel bellows 10, and then flows out from the bottom terminal 6 through the conductive coil 7.

[0040] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig.11 and Fig.12 As shown, separation devices 8 for driving the upper conductive rod 2 and the lower conductive rod 3 to open and close are also provided at both ends of the conductive coil 7, and a protection device 9 for protecting the upper conductive rod 2 is also provided inside the arc extinguishing box 5;

[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 conductive rod 3. Two slidable insulating sleeves 901 are arranged on the two support columns 906. The middle parts of the two insulating sleeves 901 are recessed inward to form a groove. An adjustment mechanism is arranged between the ends of the two inclined plates 902 away from the power rod 807 and the lower conductive rod 3. The two insulating sleeves 901 are made of insulating material, 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 conductive rod 2, and the upper conductive rod 2 is wrapped by the two insulating sleeves 901;

[0042] The adjusting mechanism includes a push plate 905 sleeved on the support column 906, a support rod is provided at the bottom of the push plate 905, and two pull rods 907 are hinged to the top of the two support rods and the top of the top terminal 4, and the lower half of the two push plates 905 is provided with a through hole adapted to the support column 906, and one end of the support column 906 is arranged around the connecting block of the lower conductive rod 3 after passing through the through hole and does not contact the lower conductive rod 3, and the two sides of the two push plates 905 facing each other are respectively fixed to the two insulating sleeves 901, and two bearings are provided at both ends of the two support rods, and one end of the pull rod 907 is rotatably mounted 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, so that the pull rod 907 drives the insulating sleeve 901 to move along the outer wall of the support column 906 through the push 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, and the upper conductive rod 2 moves downward, and the upper conductive rod 2 drives the pull rod 907 to move downward, so that the pull rod 907 rotates around the support rod through the bearing, so that the support rod drives the push plate 905 to move, and the push plate 905 is limited by the support column 906, so that the push plate 905 moves along the outer wall of the support column 906, so that the push plate 905 pushes the insulating sleeve 901 to move, and after the two insulating sleeves 901 are moved to the outside of the connecting block of the upper conductive rod 2, the upper conductive rod 2 is wrapped by a protective groove composed of two grooves, and the upper conductive rod 2 is protected by 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, it can prevent the upper conductive rod 2 from damaging other electrical components inside the emergency cutting device body 1, and can also prevent the staff from contacting the upper conductive rod 2 when performing maintenance in the narrow space inside the emergency cutting device body 1, which not only reduces the cost of maintenance, but also greatly improves safety.

[0045] Secondly, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9As shown, the separation device 8 includes an iron rod 801 arranged inside the conductive coil 7, two protective covers 802 are symmetrically arranged on both sides of the iron rod 801, two range-extending mechanisms are arranged on the opposite sides of the two protective covers 802, two power rods 807 are arranged on the tops of the two range-extending mechanisms, and slots adapted to the iron rod 801 are arranged on the opposite sides of the two protective covers 802. Both ends of the iron rod 801 are inserted into the slots, and two rectangular grooves are provided on the partition plate for facilitating the movement of the power rod 807. The tops of the two power rods 807 pass through the rectangular grooves and are located in the first placement cavity, and circular grooves adapted to the iron rod 801 are provided on the opposite sides of the two protective covers 802.

[0046] The range-extending mechanism comprises a main rack 804 fixed on both sides of the inner wall of the emergency shut-off device body 1 and two side plates 808 fixed on the end of the protective cover 802 away from the iron rod 801, a rotatable main gear 803 is arranged between the two side plates 808, a main rack 804 meshing with the main gear 803 is arranged below the main gear 803, a rotatable adjusting wheel 805 is arranged above the main gear 803, a movable plate 806 adapted to the adjusting wheel 805 is arranged above the adjusting wheel 805, the top of the auxiliary rack 806 is fixed to the bottom of the power rod 807, an extension rod is arranged at one end of the main rack 804, the extension rod is fixed to the inner wall of the emergency shut-off device body 1, the main gear 803 and the adjusting wheel 805 are respectively arranged at 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, and the outer wall of the adjusting wheel 805 A plurality of driving pawls adapted to the main gear 803 are provided, and the number of teeth of the main gear 803 is greater than the number of driving pawls of the adjusting wheel 805, and the main gear 803 is connected to the adjusting wheel 805 by a belt, and a plurality of braking grooves adapted to the driving pawls are provided at the bottom of the movable plate 806, and a plurality of clamping plates are symmetrically provided on the upper half of the power rod 807, and the plurality of clamping plates are symmetrically provided on the top and bottom of the partition plate, and the power rod 807 is limited by the partition plate so that the power rod 807 can move along the rectangular groove, and the protective cover 802 is driven to move by the iron rod 801, so that the protective cover 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, and 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 secondary rack 806.

[0047] The outer wall of the upper conductive rod 2 is also symmetrically provided with two limit plates 903, on which two main mounting blocks 904 that can be lifted and lowered are arranged, and two inclined plates 902 are hingedly connected between the two main mounting blocks 904 and the two power rods 807, and the two limit plates 903 are fixed to the outside of the connecting block on the lower conductive rod 3, and the axis lines of the two limit plates 903 and the two support columns 906 are perpendicular to each other, and the two main mounting blocks 904 are provided with main mounting grooves at one end away from the two limit plates 903, and the two mounting grooves are provided with two The main rotating shaft and the top of the two power rods 807 are provided with two auxiliary mounting blocks, the top of the two auxiliary mounting blocks are provided with two auxiliary mounting grooves, and two auxiliary rotating shafts are provided in the two auxiliary mounting grooves. The two ends of the inclined plate 902 are rotatably installed between the main mounting block 904 and the power rod 807 through the main rotating shaft and the auxiliary rotating shaft respectively. The power rod 807 drives the main mounting block 904 to rise and fall through the inclined plate 902, so that the main mounting block 904 drives the upper conductive rod 2 to rise and fall through the limit plate 903, thereby facilitating the separation of the upper conductive rod 2 and the lower conductive rod 3.

[0048] By adopting the above technical solution:

[0049] When in 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 larger distance, so that the iron rod 801 pushes the protective cover 802 to move, and the protective cover 802 drives the side plate 808 to move, and the side plate 808 drives the main gear 803 to move, and the main gear 803 cooperates with the main rack 804 to make the main gear 803 rotate, and the main gear 803 drives the adjusting wheel 805 meshing with it to rotate, and drives the auxiliary rack 806 to move through the adjusting wheel 805, so that the auxiliary rack 806 drives the power rod 807 to move, and the power rod 807 drives the auxiliary mounting block to move, so that the auxiliary mounting The mounting block drives the inclined plate 902 to move, so that the inclined plate 902 drives the main mounting block 904 to move downward, so that the main mounting block 904 and the lower conductive rod 3 are driven downward through the limit plate 903, so that the lower conductive rod 3 is separated from the upper conductive rod 2, and the tooth ratio of the main gear 803 and the adjusting wheel 805 is utilized to make the adjusting wheel 805 drive the auxiliary rack 806 to move a certain distance. The rigid connection of the main gear 803, the main rack 804, the adjusting wheel 805, the auxiliary rack 806 and the power rod 807 is used to replace the elastic connection of the limit spring, so that the circuit is cut off faster, the response time is shorter and the reliability is higher.

[0050] Again, reference Fig.11 and Fig.12As shown, the side of the limit plate 903 away from the upper conductive rod 2 extends outward to form a boss, and blocking blocks are symmetrically arranged on the top and bottom of the limit plate 903, and a slide groove matched with the boss is arranged in the middle of the main mounting block 904. Through the cooperation of the slide groove and the boss, the main mounting block 904 can slide up and down in the middle of the limit plate 903, and the main mounting block 904 is limited by the blocking block to prevent the main mounting block 904 from falling off the limit plate 903 when sliding on the outside of the limit plate 903.

[0051] The bottom of the lower conductive rod 3 passes through the partition plate and is fixed with a stainless steel bellows 10. The bottom positioning plate of the stainless steel bellows 10 has two connecting rods symmetrically fixed at both ends of the positioning plate. The ends of the two connecting rods away from the positioning plate are fixed to the bottom of the partition plate.

[0052] By adopting the above technical solution:

[0053] During use, when alternating current is passed through 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, and the iron rod 801 drives the protective cover 802 to move back and forth slightly. The protective cover 802 drives the power rod 807 to move back and forth slightly through the range-extending mechanism. The power rod 807 drives the inclined plate 902 to move back and forth, and 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 block, the upper conductive rod 2 and the lower conductive rod 3 will be separated, thereby increasing the stability of the current passing through the device.

[0054] Finally, reference Fig. 9 and Fig.10 As shown, a positioning sleeve 809 is fixed to the outer wall of the protective sleeve 802, an adjustable telescopic rod 810 is provided at one end of the positioning sleeve 809 away from the protective sleeve 802, a rotatable pulley 811 is provided at one end of the telescopic rod 810 away from the positioning sleeve 809, and a wheel groove matched with the pulley 811 is provided on the inner wall of the emergency cutting 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, and the protective sleeve 802 supports the iron rod 801. Through the cooperation of the pulley 811 and the wheel groove, the iron rod 801 can move back and forth inside the conductive coil 7.

[0055] A liftable locking rod 812 is provided on the top of the positioning sleeve 809, a locking hole matched with the locking rod 812 is provided on the outer wall of the telescopic rod 810, a pull plate is provided on the top of the locking rod 812, and a spring is provided between the pull plate and the positioning sleeve 809. Through the cooperation between the locking rod 812 and the locking hole, people can adjust the length of the outside of the positioning sleeve 809 extended by the telescopic rod 810.

[0056] By adopting the above technical solution:

[0057] When in use, the locking rod 812 is pulled to move the locking rod 812 to the outside of the lock hole, so that the locking rod 812 is separated from the telescopic rod 810, and the telescopic rod 810 is pulled to move so that the telescopic rod 810 moves to the outside of the positioning sleeve 809, thereby increasing the extension distance of the telescopic rod 810, thereby facilitating the adjustment of the position of the protective cover 802 and the adjustment of the position of the iron rod 801, which is convenient and quick.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An emergency cut-off device for circuit protection, characterized in that: include: An emergency shutoff device body (1), wherein a slot cavity is provided inside the emergency shutoff device body (1), a partition plate is fixed in the middle of the slot cavity, an arc extinguishing box (5) is provided above the partition plate, a top wiring terminal (4) is provided at the top of the arc extinguishing box (5), an upper conductive rod (2) and a lower conductive rod (3) for transmitting current are provided inside the arc extinguishing box (5), a conductive coil (7) is provided at the bottom of the lower conductive rod (3) passing through the partition plate, and a bottom wiring terminal (6) is provided between the conductive coil (7) and the emergency shutoff device body (1); The two ends of the conductive coil (7) are also provided with a separation device (8) for driving the upper conductive rod (2) and the lower conductive rod (3) to open and close, and the arc extinguishing box (5) is also provided with a protection device (9) for protecting the upper conductive rod (2); The protection device (9) comprises two support columns (906) fixed inside the arc extinguishing box (5) and an inclined plate (902) arranged on the outer wall of the lower conductive rod (3); two slidable insulating sleeves (901) are arranged on the two support columns (906); the middle parts of the two insulating sleeves (901) are recessed inward to form a groove; and an adjustment mechanism is arranged between one end of the two inclined plates (902) away from the power rod (807) and the lower conductive rod (3); The adjustment mechanism comprises a push plate (905) sleeved on a support column (906), a support rod is arranged at the bottom of the push plate (905), two support rods are hinged to the top of the top terminal (4) with two pull rods (907), and the lower half of the two push plates (905) are provided with through holes adapted to the support column (906).

2. The circuit protection emergency cut-off device according to claim 1, characterized in that: The separation device (8) comprises an iron rod (801) arranged inside the conductive coil (7), two protective covers (802) are symmetrically arranged on both sides of the iron rod (801), two range-extending mechanisms are arranged on opposite sides of the two protective covers (802), and two power rods (807) are arranged on the tops of the two range-extending mechanisms.

3. The circuit protection emergency cut-off device according to claim 2, characterized in that: The range-extending mechanism comprises main racks (804) fixed on both sides of the inner wall of the emergency shut-off device body (1) and two side plates (808) fixed on the end of the protective cover (802) away from the iron rod (801); a rotatable main gear (803) is arranged between the two side plates (808); a main rack (804) meshing with the main gear (803) is arranged below the main gear (803); a rotatable adjusting wheel (805) is arranged above the main gear (803); a movable plate (806) adapted to the adjusting wheel (805) is arranged above the adjusting wheel (805); and the top of the auxiliary rack (806) is fixed to the bottom of the power rod (807).

4. The circuit protection emergency cut-off device according to claim 1, characterized in that: The outer wall of the upper conductive rod (2) is also symmetrically provided with two limit plates (903), on which two liftable main mounting blocks (904) are provided, and between the two main mounting blocks (904) and the two power rods (807) are hinged two inclined plates (902).

5. The circuit protection emergency cut-off device according to claim 4, characterized in that: The limiting plate (903) extends outwardly from one side of the upper conductive rod (2) to form a boss, and blocking blocks are symmetrically arranged at the top and bottom of the limiting plate (903), and a sliding groove adapted to the boss is arranged in the middle of the main mounting block (904).

6. The circuit protection emergency cut-off device according to claim 3, characterized in that: 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); and a wheel groove matched with the pulley (811) is arranged on the inner wall of the emergency shut-off device body (1).

7. The circuit protection emergency cut-off device according to claim 6, characterized in that: A liftable locking rod (812) is disposed on the top of the positioning sleeve (809), and a locking hole matching the locking rod (812) is formed on the outer wall of the telescopic rod (810).

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

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