Transverse push type drop-out fuse

Abstract

The utility model discloses a horizontal push type drop-out fuse, which comprises an isolation arc-preventing device and a transmission assembly, and further comprises an insulation support column, the insulation support column is used as a support column and a mounting bracket to support an integral structure, the upper part of the insulation support column is connected with the isolation arc-preventing device, and the lower part of the insulation support column is connected with a fuse carrier hook. A current transformer is arranged in the lower portion of the insulation supporting column, the current transformer is connected with the insulation supporting column through a connecting bolt, a lower pile head is arranged at the bottom of the insulation supporting column, a fusion tube is arranged on the side, opposite to the insulation supporting column, of the insulation supporting column, and a fusion tube upper sleeve and a fusion tube lower sleeve are arranged at the upper end and the lower end of the fusion tube respectively. The middle end of the fusion tube is provided with a mechanical push-and-pull tube, one end of the mechanical push-and-pull tube is provided with a rotating fuse carrying piece movable hook, the mechanical push-and-pull tube is in a shifting fork shape, and the other end of the mechanical push-and-pull tube is in lap joint with the insulating supporting column and is in bolt connection with a support mounting plate on the transmission assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power equipment, and in particular relates to a horizontal push-type drop-out fuse. Background Art

[0002] A fuse is an electrical device that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. A fuse is a current protector made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself will melt the fuse and disconnect the circuit. Fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As a short circuit and overcurrent protector, they are one of the most commonly used protection devices.

[0003] When the fuse is working, when the short-circuit current passes through the fuse and melts, an arc is generated. The steel paper tube lining the fuse tube generates a large amount of gas under the action of the arc. Because the upper end of the fuse tube is sealed, the gas sprays out to the lower end and blows out the arc. As the fuse is blown, the upper and lower moving contacts of the fuse tube lose the tightening force of the fuse. Under the action of the fuse tube's own gravity and the upper and lower static contact springs, the fuse tube falls rapidly, disconnecting the circuit and cutting off the faulty section of the line or the faulty equipment. If the drop-out fuse cannot be disconnected by itself due to the faulty section of the line or the faulty equipment, please open it, which will cause the drop-out fuse to generate a large instantaneous arc, which will bring safety hazards to the personnel working on the line and damage the equipment.

[0004] Traditional fuses are operated manually. Operators use operating rods to open or close the fuses, directly contacting electrical components, increasing the risk of electric shock and poor operational safety.

[0005] In view of the above factors, a horizontal push-type drop-out fuse is specially designed. The circuit current data is collected through the current transformer. When the control system detects that the current is too large, it issues an opening command and controls the motor to push the push rod to open the circuit; when the control system detects that the circuit returns to normal, it issues a closing command and controls the motor to pull the push rod back to close the circuit. Utility Model Content

[0006] The utility model aims to provide a horizontal push-type drop-out fuse to solve the problems raised in the above-mentioned background technology.

[0007] The purpose of the utility model is achieved through the following technical solutions: a horizontal push-type drop-out fuse, comprising an isolation arc protection device and a transmission assembly, wherein the isolation arc protection device is detachably connected to a pin shaft positioning cover, a positioning hole is provided on the pin shaft positioning cover, the positioning hole is threadedly connected to one end of the pin shaft rod, the other end of the pin shaft rod is plug-connected to the arc protection isolation plate, an isolation spring is sleeved on the pin shaft rod, rectangular bosses are symmetrically provided on both sides of the arc protection isolation plate, the bosses provided on the arc protection isolation plate cooperate with the track grooves provided on the isolation arc protection device, and also include an insulating support, the insulating support serves as a support and a mounting bracket to support the overall structure, the upper part of the insulating support is connected to the isolation arc protection device, the lower part of the insulating support is connected to the fuse carrier hook, a current transformer is built-in below the insulating support, the current transformer is connected to the insulating support through a connecting bolt, and a lower pile head is provided at the bottom of the insulating support;

[0008] A fuse is arranged on the side opposite to the insulating support, and an upper fuse sleeve and a lower fuse sleeve are respectively arranged at the upper and lower ends of the fuse, a mechanical push-pull tube is installed at the middle end of the fuse, and a rotating fuse-carrying movable hook is installed at one end of the mechanical push-pull tube. The mechanical push-pull tube is in the shape of a fork, and the other end of the mechanical push-pull tube overlaps the insulating support and is bolted to the bracket mounting plate on the transmission assembly.

[0009] Furthermore, the upper end of the upper sleeve of the fuse tube is connected to the isolation and arc protection device, and the lower sleeve of the fuse tube is connected to the lower contact through a pin screw. The protruding shafts at both ends of the lower contact are overlapped on the fuse carrier hook, and the fuse carrier hook is connected to the lower part of the insulating support through bolts.

[0010] Furthermore, a melt carrier copper cap is provided at the upper end of the upper sleeve of the melting tube, and the melt carrier copper cap contacts and cooperates with an upper contact phosphor copper sheet provided in the isolation and arc protection device.

[0011] Furthermore, an upper contact phosphor copper sheet is provided in the isolation and arc protection device, the upper contact phosphor copper sheet is connected to the insulating support by bolts, and the left end of the upper contact phosphor copper sheet extends outward from an upper pile head and extends outward through an extension opening of the isolation and arc protection device.

[0012] Furthermore, the transmission assembly includes a control motor and a motor cover fixed outside the control motor. The transmission assembly also includes a transmission rack, a transmission gear, and a rack pressing plate. The transmission rack is meshed with the transmission gear, and the transmission gear is driven to rotate by the control motor.

[0013] Further, the front end of the transmission rack is bolted to the bracket mounting plate on the transmission assembly;

[0014] The transmission rack is located between the rack pressing plates, the rack pressing plates are symmetrically arranged, and the rack pressing plates are connected to the upper motor bottom plate and the lower bottom plate by bolts.

[0015] Furthermore, a travel switch is detachably connected to the bracket mounting plate on the transmission assembly.

[0016] Furthermore, the hook head of the movable hook of the melt carrier is bilaterally symmetrical, and the hollow position of the movable hook of the melt carrier is used to accommodate the melting tube.

[0017] Furthermore, a rainproof cover is installed inside the isolation arc protection device. The rainproof cover is arranged above the upper contact phosphor copper sheet and is fixed together with the upper contact phosphor copper sheet and the insulating support by bolts.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] Compared with traditional fuses, the horizontal push enclosed fuse of the utility model avoids direct contact with electrical components during operation, reduces the risk of electric shock, and improves operational safety. The horizontal push enclosed fuse adopts a push-pull design, and there is no need to remove the fuse when replacing the fuse wire, which simplifies the replacement operation and improves operational convenience.

[0020] The closed design of the utility model can effectively prevent the influence of dust and humid air on the fuse, thereby improving the reliability and service life of the fuse.

[0021] The utility model prevents external objects from touching: the closed design can effectively prevent external objects from accidentally touching the fuse, thereby reducing the risk of accidental electric shock.

[0022] The utility model collects circuit current data through a current transformer. When the control system detects that the current is too large, it issues a switch-off command and controls the motor to push the push rod to switch off. When the control system detects that the circuit returns to normal, it issues a switch-on command and controls the motor to pull the push rod back to switch on. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0024] Figure 2 It is an explosion schematic diagram of the utility model;

[0025] Figure 3 It is an exploded and enlarged schematic diagram of the transmission component of the utility model;

[0026] Figure 4 This is a schematic diagram of the assembly of the isolation arc protection device of the utility model;

[0027] Figure 5It is a schematic diagram of the assembly of the transmission component of the utility model. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] like Figure 1-5 As shown, a push-type drop-out fuse includes an isolation arc protection device 1 and a transmission assembly 12, wherein the isolation arc protection device 1 is detachably connected to a pin shaft positioning cover, a positioning hole is provided on the pin shaft positioning cover, the positioning hole is threadedly connected to one end of the pin shaft rod, the other end of the pin shaft rod is plug-connected to the arc protection isolation plate 2, an isolation spring is sleeved on the pin shaft rod, rectangular bosses are symmetrically provided on both sides of the arc protection isolation plate 2, the bosses provided on the arc protection isolation plate 2 cooperate with the track grooves provided on the isolation arc protection device 1, and also includes an insulating support 3, the insulating support 3 serves as a support and supports the overall structure with the mounting bracket, the upper part of the insulating support 3 is connected to the isolation arc protection device 1, the lower part of the insulating support 3 is connected to the fuse carrier hook 4, a current transformer 5 is built-in below the insulating support 3, the current transformer 5 is connected to the insulating support 3 through a connecting bolt, and a lower pile head 6 is provided at the bottom of the insulating support 3;

[0032] A melting tube 7 is arranged on the side opposite to the insulating support 3, and an upper melting tube sleeve 8 and a lower melting tube sleeve 9 are respectively arranged at the upper and lower ends of the melting tube 7. A mechanical push-pull tube 10 is installed at the middle end of the melting tube 7, and a rotating melting member movable hook 11 is installed at one end of the mechanical push-pull tube 10. The mechanical push-pull tube 10 is in the shape of a fork, and the other end of the mechanical push-pull tube 10 is overlapped with the insulating support 3 and is bolted to the bracket mounting plate on the transmission assembly 12.

[0033] When the fuse is disconnected, the arc-proof isolation plate is ejected by the spring sleeved on the pin shaft rod, thereby playing the role of isolating and preventing arcs for the fuse. The utility model stores energy through the isolation spring to achieve ejection isolation and arc prevention.

[0034] The copper cap of the fuse carrier (a common component in high-voltage fuses) is a fuse cap fixedly connected to the fuse tube in the prior art, and a fuse cap fixed on the fuse tube in a normal state (including a pure copper fuse cap or a red copper fuse cap).

[0035] The upper end of the upper sleeve 8 of the fuse tube is connected to the isolation arc protection device 1, and the lower sleeve 9 of the fuse tube is connected to the lower contact 13 through a pin screw. The protruding shafts at both ends of the lower contact 13 are overlapped on the fuse carrier hook 4, and the fuse carrier hook 4 is connected to the lower part of the insulating support 3 by bolts.

[0036] A melt-carrying copper cap 14 is disposed at the upper end of the upper sleeve 8 of the melting tube, and the melt-carrying copper cap 14 contacts and cooperates with an upper contact phosphor copper sheet 15 disposed in the isolation arc protection device 1 .

[0037] An upper contact phosphor copper sheet 15 is provided in the isolation arc protection device 1, and the upper contact phosphor copper sheet 15 is connected to the insulating support 3 by bolts, and an upper pile head 16 is extended from the left end of the upper contact phosphor copper sheet 15 and extends outward through the extension opening of the isolation arc protection device 1.

[0038] In order to facilitate the use of the transmission gear by the forward and reverse rotation of the high-speed motor to drive the transmission gear to rotate, so that the transmission rack and the transmission gear are engaged with each other, the transmission assembly 12 includes a control motor 12-1 and a motor cover fixed outside the control motor 12-1, and the transmission assembly also includes a transmission rack 12-2, a transmission gear 12-3, and a rack pressure plate 12-4. The transmission rack 12-2 is engaged with the transmission gear 12-3, and the transmission gear 12-3 is driven to rotate by the control motor 12-1.

[0039] In order to ensure the positioning and movement of the transmission assembly when in use, the front end of the transmission rack 12-2 is bolted to the bracket mounting plate on the transmission assembly 12;

[0040] The transmission rack 12-2 is located between the rack pressing plates 12-4, the rack pressing plates 12-4 are symmetrically arranged, and the rack pressing plates 12-4 are connected to the upper motor base plate 12-5 and the lower base plate 12-6 by bolts.

[0041] In order to facilitate the determination of the position or the automatic stop of the stroke by the travel switch in the use state, the travel switch 17 is detachably connected to the bracket mounting plate on the transmission assembly 12.

[0042] In order to facilitate dust and moisture prevention during use, a closed design is adopted to effectively prevent the influence of dust and humid air on the fuse, thereby improving the reliability and service life of the fuse. A rainproof cover is also installed inside the isolation arc protection device 1. The rainproof cover is arranged above the upper contact phosphor copper sheet 15 and is fixed together with the upper contact phosphor copper sheet 15 and the insulating support 3 by bolts.

[0043] The horizontal push-type drop-out fuse is connected to an external control system. The control system collects circuit current data through a current transformer. When the control system detects that the current is too large, it issues an opening command and controls the motor to push the push rod to open the circuit. When the control system detects that the circuit returns to normal, it issues a closing command and controls the motor to pull the push rod back to close the circuit.

[0044] When the control system fails, the circuit current is too large, melting the fuse in the fuse tube to form an arc. A large amount of gas is generated in the fuse tube, blowing the arc, making the arc elongated and extinguished. At the same time, the fuse pulling force is lost. Under the action of gravity, the fuse tube falls downward, cutting off the circuit and forming an obvious disconnection distance.

[0045] The utility model can be replaced more conveniently. The horizontal push enclosed fuse adopts a push-pull design. When replacing the fuse wire, there is no need to remove the fuse, which simplifies the replacement operation and improves the convenience of operation. It can prevent external personnel from misoperating or accidentally damaging the fuse, improve the safety and reliability of the circuit, avoid the tedious manual operation, and improve the automation level of the power grid.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A push-type drop-out fuse, comprising an isolation arc protection device (1) and a transmission assembly (12), wherein the isolation arc protection device (1) is detachably connected to a pin shaft positioning cover, a positioning hole is provided on the pin shaft positioning cover, the positioning hole is threadedly connected to one end of a pin shaft rod, the other end of the pin shaft rod is plug-connected to an arc protection isolation plate (2), an isolation spring is sleeved on the pin shaft rod, rectangular bosses are symmetrically provided on both sides of the arc protection isolation plate (2), the bosses provided on the arc protection isolation plate (2) cooperate with track grooves provided on the isolation arc protection device (1), and the characteristics are as follows: It also comprises an insulating support (3), the insulating support (3) serving as a support and supporting the overall structure with the mounting bracket, the upper part of the insulating support (3) being connected to the isolation arc protection device (1), the lower part of the insulating support (3) being connected to the fuse carrier hook (4), a current transformer (5) being built-in below the insulating support (3), the current transformer (5) being connected to the insulating support (3) via a connecting bolt, and a lower pile head (6) being provided at the bottom of the insulating support (3); A melting tube (7) is arranged on the side opposite to the insulating support (3), and an upper melting tube sleeve (8) and a lower melting tube sleeve (9) are arranged at the upper and lower ends of the melting tube (7), respectively. A mechanical push-pull tube (10) is installed at the middle end of the melting tube (7), and a rotating melting member movable hook (11) is installed at one end of the mechanical push-pull tube (10). The mechanical push-pull tube (10) is in the shape of a fork, and the other end of the mechanical push-pull tube (10) overlaps the insulating support (3) and is bolted to the bracket mounting plate on the transmission component (12); A melt-carrying copper cap (14) is provided at the upper end of the upper sleeve (8) of the melting tube, and the melt-carrying copper cap (14) contacts and cooperates with an upper contact phosphor copper sheet (15) provided in the isolation arc protection device (1); An upper contact phosphor copper sheet (15) is arranged in the isolation arc protection device (1), and the upper contact phosphor copper sheet (15) is connected to the insulating support (3) by means of bolts, and the left end of the upper contact phosphor copper sheet (15) extends outward from an upper pile head (16) and passes through an extension opening of the isolation arc protection device (1); The transmission assembly (12) comprises a control motor (12-1) and a motor cover fixed outside the control motor (12-1), and the transmission assembly also comprises a transmission rack (12-2), a transmission gear (12-3), and a rack pressing sheet (12-4), the transmission rack (12-2) meshingly cooperates with the transmission gear (12-3), and the transmission gear (12-3) is driven to rotate by the control motor (12-1); The front end of the transmission rack (12-2) is bolted to the bracket mounting plate on the transmission assembly (12); The transmission rack (12-2) is located between the rack pressing plates (12-4), the rack pressing plates (12-4) are symmetrically arranged, and the rack pressing plates (12-4) are connected to the upper motor bottom plate (12-5) and the lower bottom plate (12-6) by bolts; The bracket mounting plate on the transmission assembly (12) is detachably connected to a travel switch (17); The hook head of the movable hook (11) of the melt carrier is symmetrical on both sides, and the hollow position of the movable hook (11) of the melt carrier is used to accommodate the melt tube (7); The push-type drop-out fuse is connected to an external control system. The control system collects circuit current data through a current transformer. When the control system detects that the current is too large, it issues an opening command and controls the motor to push the push rod to open the circuit. When the control system detects that the circuit returns to normal, it issues a closing command and controls the motor to pull the push rod back to close the circuit. When the control system fails, the circuit current is too large, melting the fuse in the fuse tube to form an arc. A large amount of gas is generated in the fuse tube, blowing the arc, making the arc elongated and extinguished. At the same time, the fuse pulling force is lost. Under the action of gravity, the fuse tube falls downward, cutting off the circuit and forming an obvious disconnection distance.

2. The push-type drop-out fuse according to claim 1, characterized in that: The upper end of the upper sleeve (8) of the fuse tube is connected to the isolation arc protection device (1), and the lower sleeve (9) of the fuse tube is connected to the lower contact (13) through a pin screw. The protruding shafts at both ends of the lower contact (13) are overlapped on the fuse carrier hook (4), and the fuse carrier hook (4) is connected to the lower part of the insulating support (3) through bolts.

3. The push-type drop-out fuse according to claim 2, characterized in that: A rainproof cover is also installed inside the arc-isolating device (1). The rainproof cover is arranged above the upper contact phosphor copper sheet (15) and is fixed together with the upper contact phosphor copper sheet (15) and the insulating support (3) by bolts.

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