Fuse detection device

Abstract

The utility model discloses a fuse detection device which is used for detecting the state of a fuse, when the fuse is converted from a normal state to a fusing state, a fusion tube of the fuse falls from a longitudinal extension posture to a transverse extension posture, the fuse detection device comprises a trigger unit and an acquisition unit, the trigger unit is installed on the fusion tube, and the acquisition unit is installed on the fusion tube. The trigger unit moves along with the fusion tube; the acquisition unit is installed in the middle of an insulator of the fuse and is used for sensing the trigger unit so as to judge whether the fuse is in a normal state or a fusing state according to whether the trigger unit is sensed or not. According to the technical scheme, when the fuse is converted from the normal state to the fusing state, the fusion tube of the fuse falls to the transverse extension posture, so that the trigger unit exits the induction area of the acquisition unit along with the movement of the fusion tube, and the acquisition unit can judge that the fuse is switched to the fusing state; therefore, the state information of the fuse can be obtained in time.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a fuse detection device. Background Art

[0002] The drop-out fuse (commonly known as the drop-out switch) is the most commonly used short-circuit protection switch in power systems with a rated voltage of 35kV and below. It is usually installed on the high-voltage side of the distribution transformer or on the distribution branch line. It can be used in conjunction with the disconnector to replace the automatic air switch; it can also be used in conjunction with the load switch to replace the expensive circuit breaker. It also has short-circuit protection, overload and isolation circuits. It is economical, easy to operate, and highly adaptable to outdoor environments. It is widely used in power systems and the primary side of distribution transformers of 35kV and below for protection and equipment switching operations.

[0003] The drop-out fuse consists of several parts, such as an insulator, upper / lower static contacts, and a fuse tube. When the drop-out fuse works normally, the button-shaped fuse is installed on the upper contact of the fuse tube and is compressed by the pressure release cap equipped with a pressure piece. The fuse tail is pulled out through the fuse tube, and the pop-up plate is twisted back and pressed close to the nozzle to connect with the lower contact. Under the action of the torsion of the pop-up plate, the fuse is always in a tensioned state and the movable joint is locked.

[0004] When a fault occurs in the power grid system, the fault current will quickly blow the fuse. After the fuse blows, the movable joint is released. Under the pressure of the spring under the upper static contact and the effect of its own weight, the tightening mechanism releases the fuse. The fuse falls rapidly, cutting off the circuit and forming an obvious disconnecting gap.

[0005] However, the existing fuses themselves do not have detection capabilities and cannot sense the opening and closing status of the fuses. It is necessary to arrange line inspections only when the user experiences a power outage, which causes a lot of inconvenience. Utility Model Content

[0006] The main purpose of the utility model is to provide a fuse detection device, aiming to solve the problem that the existing fuse cannot detect the fuse state in real time.

[0007] To achieve the above-mentioned purpose, the utility model proposes a fuse detection device, which is used to detect the state of the fuse. When the fuse changes from a normal state to a blown state, the fuse tube of the fuse will fall from a longitudinally extended posture to a transversely extended posture. The fuse detection device is characterized in that it includes:

[0008] A trigger unit is mounted on the melting tube so that the trigger unit moves along with the melting tube;

[0009] The acquisition unit is installed in the middle of the insulator of the fuse and is used to sense the trigger unit so as to determine whether the fuse is in a normal state or a blown state according to whether the trigger unit is sensed.

[0010] In some embodiments of the utility model, the acquisition unit includes a shell, a magnetic induction sensor and a controller. The shell is installed in the middle of the insulator of the fuse. The magnetic induction sensor and the controller are both installed in the shell. The controller is electrically connected to the magnetic induction sensor and the control background so as to send a signal to the control background according to the sensing result of the magnetic induction sensor.

[0011] In some embodiments of the present invention, there are multiple magnetic induction sensors, and the multiple magnetic induction sensors are arranged at intervals along a direction close to or away from the melting tube.

[0012] In some embodiments of the present invention, the collection unit also includes a battery, a solar panel and a rectifier plate, the solar panel is installed on the outer wall of the shell, the battery and the rectifier plate are both installed in the shell, and the rectifier plate is electrically connected to the solar panel, the battery, the controller and the magnetic induction sensor to distribute the electricity generated by the solar panel to the battery, the controller and the magnetic induction sensor.

[0013] In some embodiments of the utility model, the shell includes a lower shell and an upper cover, the lower shell is provided with a mounting groove, the magnetic induction sensor, the controller, the battery and the rectifier plate are all installed in the mounting groove, the upper cover is removably covered at the notch of the mounting groove, and the solar panel is installed on the side of the upper cover away from the lower shell.

[0014] In some embodiments of the utility model, the collection unit also includes a clamp, which is clamped in the middle of the insulator of the fuse, and a connecting plate is protruding from the outer peripheral wall of the clamp. The connecting plate is provided with a mounting hole, and the mounting hole extends in a manner close to or away from the fuse tube, and the shell is movably mounted on the connecting plate.

[0015] In some embodiments of the utility model, a limiting groove is provided through the outer peripheral wall of the clamp facing away from the shell, and the limiting groove extends along the circumference of the clamp. The fuse has a limiting portion, and the limiting portion is plugged into and cooperates with the limiting groove so that the limiting portion limits the clamp in the axial and circumferential directions.

[0016] In some embodiments of the present invention, the fuse detection device further includes a mounting bracket, one end of which is sleeved on the fuse tube, and the other end of which extends toward the acquisition unit and is equipped with the trigger unit.

[0017] In some embodiments of the present utility model, the mounting bracket includes a mounting member and a fixing member, one end of the mounting member is provided with a connecting portion extending along the circumference of the melting tube, and the other end of the mounting member is provided with the trigger unit;

[0018] One end of the fixing member is rotatably mounted on one end of the mounting member in the circumferential direction of the melting tube, and the other end of the fixing member is detachably connected to the other end of the mounting member in the circumferential direction of the melting tube, so that the fixing member cooperates with the mounting member to clamp or release the melting tube.

[0019] In some embodiments of the present invention, the fuse detection device further comprises two inner liners, which are respectively mounted on a wall surface of the mounting member facing the fixing member and a wall surface of the fixing member facing the mounting member.

[0020] The technical solution of the utility model realizes the detection of the fuse state by adopting the method of using the acquisition unit to sense the trigger unit. When the fuse changes from the normal state to the blown state, the fuse tube of the fuse will fall from the longitudinal extension posture to the transverse extension posture. The fuse detection device includes a trigger unit and a acquisition unit. The trigger unit is installed on the fuse tube so that the trigger unit moves with the fuse tube; the acquisition unit is installed in the middle of the insulator of the fuse, and is used to sense the trigger unit, so as to judge whether the fuse is in the normal state or the blown state according to whether the trigger unit is sensed. In this way, when the fuse changes from the normal state to the blown state, the fuse tube of the fuse falls to the transverse extension posture, so that the trigger unit exits the sensing area of ​​the acquisition unit with the movement of the fuse tube, and then the acquisition unit can judge that the fuse is switched to the blown state, so that it is convenient to obtain the state information of the fuse in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of an embodiment of a fuse detection device of the utility model;

[0023] Figure 2 for Figure 1 The structural diagram of the acquisition unit;

[0024] Figure 3 for Figure 2Schematic diagram of the local structure of the acquisition unit;

[0025] Figure 4 for Figure 1 A partial enlarged view of

[0026] Figure 5 for Figure 1 Schematic diagram of the structure of the mounting bracket and the trigger unit.

[0027] Description of Figure Numbers:

[0028] 100. Trigger unit; 200. Collection unit; 210. Shell; 211. Lower shell; 212. Upper cover; 213. Mounting slot; 220. Magnetic induction sensor; 230. Controller; 240. Battery; 250. Solar panel; 260. Rectifier plate; 270. Clamp; 271. Limiting groove; 280. Connecting plate; 290. Mounting hole; 300. Mounting bracket; 310. Mounting piece; 320. Fixing piece; 400. Lining; A. Melting tube; B. Insulator; C. Limiting part.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The utility model provides a fuse detection device for detecting the state of a fuse. When the fuse changes from a normal state to a blown state, a fuse tube A of the fuse will fall from a longitudinally extended state to a transversely extended state.

[0034] The fuse detection device includes a trigger unit 100 and a collection unit 200. The trigger unit 100 is installed on the fuse tube A so that the trigger unit 100 moves with the fuse tube A; the collection unit 200 is installed in the middle of the insulator B of the fuse and is used to sense the trigger unit 100 to determine whether the fuse is in a normal state or a blown state based on whether the trigger unit 100 is sensed.

[0035] There are many types of the trigger unit 100 and the acquisition unit 200. For example, the trigger unit 100 is a magnet, the acquisition unit 200 is a magnetic induction module, and the acquisition unit 200 determines the state of the fuse by sensing the magnetism of the magnet through the magnetic induction module. In another example, the trigger unit 100 has a trigger portion extending toward the trigger unit 100, and the acquisition unit 200 is a button. The acquisition unit 200 determines the state of the fuse by abutting the button with the trigger portion. In another example, the trigger unit 100 is an electromagnet, the acquisition unit 200 is a magnetic induction module, and the acquisition unit 200 determines the state of the fuse by sensing the magnetism of the electromagnet through the magnetic induction module. These examples are not listed here one by one.

[0036] Preferably, the trigger unit 100 is a magnet and the acquisition unit 200 is a magnetic induction module, so that the trigger unit 100 does not require an additional external power supply, thereby making the trigger unit 100 simple in structure and facilitating the installation of the trigger unit 100, thereby facilitating the construction personnel to install the fuse detection device.

[0037] It should be noted that when the fuse is in a normal state, the fuse tube A of the fuse is in a longitudinal extension posture, at this time, the trigger unit 100 is located in the sensing area of ​​the acquisition unit 200, and when the fuse is in a blown state, the fuse tube A of the fuse is in a transverse extension posture, at this time, the trigger unit 100 is located outside the sensing area of ​​the acquisition unit 200. Therefore, the acquisition unit 200 can determine the state of the fuse by determining whether the trigger unit 100 is in the magnetic sensing area.

[0038] The technical solution of the utility model realizes the detection of the fuse state by using the acquisition unit 200 to sense the trigger unit 100. When the fuse changes from the normal state to the blown state, the fuse tube A of the fuse will fall from the longitudinal extension posture to the transverse extension posture. The fuse detection device includes a trigger unit 100 and a acquisition unit 200. The trigger unit 100 is installed on the fuse tube A so that the trigger unit 100 moves with the fuse tube A. The acquisition unit 200 is installed in the middle of the insulator B of the fuse, and is used to sense the trigger unit 100, so as to judge whether the fuse is in the normal state or the blown state according to whether the trigger unit 100 is sensed. In this way, when the fuse changes from the normal state to the blown state, the fuse tube A of the fuse falls to the transverse extension posture, so that the trigger unit 100 exits the sensing area of ​​the acquisition unit 200 with the movement of the fuse tube A, and then the acquisition unit 200 can judge that the fuse is switched to the blown state, so that it is convenient to obtain the state information of the fuse in time.

[0039] In some embodiments of the utility model, the acquisition unit 200 includes a housing 210, a magnetic induction sensor 220 and a controller 230. The housing 210 is installed in the middle of the insulator B of the fuse. The magnetic induction sensor 220 and the controller 230 are both installed in the housing 210. The controller 230 is electrically connected to the magnetic induction sensor 220 and the control background to send a signal to the control background according to the sensing result of the magnetic induction sensor 220. In this way, the housing 210 can protect the magnetic induction sensor 220 and the controller 230, thereby preventing the magnetic induction sensor 220 and the controller 230 from being affected by the external environment.

[0040] Considering that a single magnetic induction sensor 220 may easily cause the trigger unit 100 to exit the magnetic induction area when the melting tube A shakes, thereby causing a misjudgment, in view of this, the number of the magnetic induction sensors 220 is multiple, and the multiple magnetic induction sensors 220 are arranged at intervals in the direction close to or away from the melting tube A. In this way, by providing multiple magnetic induction sensors 220, the sensing area of ​​the magnetic induction sensor 220 is increased, thereby preventing the trigger unit 100 from exiting the magnetic induction area when the melting tube A shakes, causing the magnetic induction sensor 220 to make a misjudgment.

[0041] Furthermore, the collection unit 200 also includes a battery 240, a solar panel 250 and a rectifier 260. The solar panel 250 is installed on the outer peripheral wall of the housing 210. The battery 240 and the rectifier 260 are both installed in the housing 210. The rectifier 260 is electrically connected to the solar panel 250, the battery 240, the controller 230 and the magnetic induction sensor 220 to distribute the electricity generated by the solar panel 250 to the battery 240, the controller 230 and the magnetic induction sensor 220. In this way, the solar panel 250 and the rectifier 260 can cooperate to provide electricity for the battery 240 and the magnetic induction sensor 220, thereby reducing the replacement of the battery 240 by the construction personnel, thereby improving the practicality of the fuse detection device.

[0042] There are many types of solar panels 250. The solar panels 250 can be polycrystalline silicon or amorphous silicon, which are not specifically limited here. The solar panels 250 can be installed on the outer wall of the shell 210 by pasting, or by screw connection, or by other methods. There are many types of batteries 240. The batteries 240 can be nickel-cadmium batteries 240, nickel-metal hydride batteries 240, or other rechargeable batteries 240, which are not specifically limited here.

[0043] Specifically, the housing 210 includes a lower housing 211 and an upper cover 212, the lower housing 211 is provided with a mounting groove 213, the magnetic induction sensor 220, the controller 230, the battery 240 and the rectifier plate 260 are all installed in the mounting groove 213, the upper cover 212 is detachably provided at the notch of the mounting groove 213, and the solar panel 250 is installed on the side of the upper cover 212 away from the lower housing 211. In this way, the solar panel 250 can be taken out by removing the upper cover 212, so that it is convenient for construction personnel to maintain the solar panel 250, and when the solar panel 250 needs to be replaced, it is only necessary to replace the solar panel 250 and the upper cover 212 as a whole, so that it is convenient for construction personnel to replace the solar panel 250, and at the same time, the solar panel 250 is located in the upper cover 212 so that the solar panel 250 is arranged upward, so that it can better receive sunlight.

[0044] In some embodiments of the utility model, the collection unit 200 further includes a clamp 270, which is clamped in the middle of the insulator B of the fuse, and a connecting plate 280 is convexly provided on the outer peripheral wall of the clamp 270, and the connecting plate 280 is provided with a mounting hole 290, and the mounting hole 290 is extended in a manner close to or away from the fuse tube A, and the housing 210 is movably mounted on the connecting plate 280. In this arrangement, by adjusting the position of the housing 210 on the mounting hole 290, the collection unit 200 is suitable for fuses with different distances between the insulator B and the fuse tube A, thereby improving the universality of the fuse detection device.

[0045] Further, the outer peripheral wall of the clamp 270 facing away from the housing 210 is penetrated with a limiting groove 271, and the limiting groove 271 extends along the circumference of the clamp 270. The fuse has a limiting portion C, and the limiting portion C is plugged and matched with the limiting groove 271, so that the limiting portion C limits the clamp 270 in the axial and circumferential directions. In this way, the limiting portion C is in a fixed state, and the two surfaces of the limiting portion C in the axial direction of the clamp 270 abut against the groove wall of the limiting groove 271, thereby limiting the clamp 270 in the axial direction, thereby preventing the clamp 270 from sliding on the insulator B of the fuse and causing the collection unit 200 to misjudge. At the same time, the two surfaces of the limiting portion C in the circumferential direction of the clamp 270 abut against the groove wall of the limiting groove 271, thereby limiting the clamp 270 in the circumferential direction, thereby preventing the clamp 270 from rotating on the insulator B of the fuse and causing the collection unit 200 to misjudge.

[0046] In some embodiments of the present invention, the acquisition unit 200 further includes an antenna, which is mounted on the outer peripheral wall of the housing 210 and is electrically connected to the controller 230. In this way, the controller 230 can send a signal to the control background through the antenna, thereby improving the stability of signal transmission between the controller 230 and the control background.

[0047] In some embodiments of the utility model, the fuse detection device further includes a mounting bracket 300, one end of which is sleeved on the fuse tube A, and the other end of which extends toward the collection unit 200 and is mounted with a trigger unit 100. Such a configuration allows the trigger unit 100 to be closer to the collection unit 200 when the fuse is in a normal state, thereby ensuring that the trigger unit 100 is located in the sensing area of ​​the collection unit 200 when the fuse is in a normal state, thereby preventing the fuse tube A from being shaken, causing the trigger unit 100 to exit the sensing area of ​​the collection unit 200 and cause misjudgment.

[0048] Specifically, the mounting bracket 300 includes a mounting member 310 and a fixing member 320. One end of the mounting member 310 is provided with a connection portion extending along the circumference of the fuse tube A, and the other end of the mounting member 310 is provided with a trigger unit 100. One end of the fixing member 320 is rotatably mounted on one end of the mounting member 310 in the circumference of the fuse tube A, and the other end of the fixing member 320 is detachably connected to the other end of the mounting member 310 in the circumference of the fuse tube A, so that the fixing member 320 cooperates with the mounting member 310 to clamp or release the fuse tube A. In this way, the trigger unit 100 can be removed or installed on the fuse tube A by controlling the connection relationship between the fixing member 320 and the mounting member 310, so that it is convenient for construction personnel to maintain the fuse detection device. At the same time, by extending one end of the mounting member 310 along the circumference of the fuse tube A, the contact area between the mounting member 310 and the fuse tube A is increased, so that the mounting member 310 and the fixing member 320 can be more stably installed on the fuse tube A.

[0049] Furthermore, the fuse detection device further includes two liners 400, which are respectively mounted on the wall of the mounting member 310 facing the fixing member 320 and the wall of the fixing member 320 facing the mounting member 310. In this way, by arranging the liners 400 between the mounting member 310 and the fixing member 320 and the melting tube A, the mounting member 310 and the fixing member 320 are more closely attached to the melting tube A, thereby increasing the friction between the mounting member 310 and the fixing member 320 and the melting tube A, and further enabling the mounting member 310 and the fixing member 320 to be more stably mounted on the melting tube A, thereby preventing the mounting member 310 and the fixing member 320 from moving relative to the melting tube A, causing the trigger unit 100 to exit the sensing area of ​​the acquisition unit 200, and causing the fuse detection device to misjudge.

[0050] The lining 400 may be made of a variety of materials. The lining 400 may be made of insulating rubber, sponge, or other elastic insulating materials, which are not specifically limited here.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fuse detection device for detecting the state of a fuse, wherein when the fuse changes from a normal state to a blown state, the fuse tube of the fuse will fall from a longitudinally extended posture to a transversely extended posture, characterized in that: The fuse detection device comprises: A trigger unit is mounted on the melting tube so that the trigger unit moves along with the melting tube; The acquisition unit is installed in the middle of the insulator of the fuse and is used to sense the trigger unit so as to determine whether the fuse is in a normal state or a blown state according to whether the trigger unit is sensed.

2. The fuse detection device according to claim 1, characterized in that: The acquisition unit includes a shell, a magnetic induction sensor and a controller. The shell is installed in the middle of the insulator of the fuse. The magnetic induction sensor and the controller are both installed in the shell. The controller is electrically connected to the magnetic induction sensor and the control background to send a signal to the control background according to the sensing result of the magnetic induction sensor.

3. The fuse detection device according to claim 2, characterized in that: There are multiple magnetic induction sensors, and the multiple magnetic induction sensors are arranged at intervals along a direction close to or away from the melting tube.

4. The fuse detection device according to claim 2, characterized in that: The collection unit also includes a battery, a solar panel and a rectifier plate. The solar panel is installed on the outer wall of the shell, and the battery and the rectifier plate are both installed in the shell. The rectifier plate is electrically connected to the solar panel, the battery, the controller and the magnetic induction sensor to distribute the electricity generated by the solar panel to the battery, the controller and the magnetic induction sensor.

5. The fuse detection device according to claim 4, characterized in that: The shell includes a lower shell and an upper cover, the lower shell is provided with a mounting groove, the magnetic induction sensor, the controller, the battery and the rectifier plate are all installed in the mounting groove, the upper cover is removably covered at the notch of the mounting groove, and the solar panel is installed on a side of the upper cover away from the lower shell.

6. The fuse detection device according to claim 2, characterized in that: The collection unit also includes a clamp, which is clamped in the middle of the insulator of the fuse. A connecting plate is protruding from the outer wall of the clamp, and the connecting plate is provided with a mounting hole. The mounting hole extends in a manner close to or away from the fuse tube, and the shell is movably mounted on the connecting plate.

7. The fuse detection device according to claim 6, characterized in that: A limiting groove is provided through the outer peripheral wall of the clamp facing away from the shell, and the limiting groove extends along the circumference of the clamp. The fuse has a limiting portion, and the limiting portion is plug-fitted with the limiting groove so that the limiting portion limits the clamp in the axial and circumferential directions.

8. The fuse detection device according to any one of claims 1 to 7, characterized in that: The fuse detection device further comprises a mounting bracket, one end of which is sleeved on the fuse tube, and the other end of which extends toward the collection unit and is mounted with the trigger unit.

9. The fuse detection device according to claim 8, characterized in that: The mounting bracket includes a mounting member and a fixing member, one end of the mounting member is provided with a connecting portion extending along the circumference of the melting tube, and the other end of the mounting member is provided with the trigger unit; One end of the fixing member is rotatably mounted on one end of the mounting member in the circumferential direction of the melting tube, and the other end of the fixing member is detachably connected to the other end of the mounting member in the circumferential direction of the melting tube, so that the fixing member cooperates with the mounting member to clamp or release the melting tube.

10. The fuse detection device according to claim 9, characterized in that: The fuse detection device further comprises two inner liners, which are respectively mounted on a wall surface of the mounting member facing the fixing member and a wall surface of the fixing member facing the mounting member.

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