An intelligent control drop-out fuse

Abstract

The present invention relates to the technical field of fuses, and in particular to an intelligent controlled drop-out type fuse, comprising an insulating member, an incoming line terminal arranged at the upper end of the insulating member through an upper bracket, an outgoing line terminal arranged at the lower end of the insulating member through a lower bracket, a static contact electrically connected to the incoming line terminal, and a rain shield fixedly mounted on the upper bracket, and also comprising: a mounting plate fixedly connected to the top of the static contact; an adjustment plate arranged below the rain shield through a vertical guiding mechanism; a pressure detection member fixedly mounted on the bottom of the adjustment plate; a contact spring located between the mounting plate and the adjustment plate, the upper end of the contact spring being connected to the pressure detection member, and the lower end of the contact spring being fixedly connected to the mounting plate; an intelligent control unit controlling a tension adjustment mechanism to adjust the tension of the contact spring according to a pressure information value detected by the pressure detection member, so that the tension of the contact spring can maintain stable contact between the static contact and a metal cap.

Description

Technical Field

[0001] The present invention relates to the field of fuses, and in particular to an intelligent controlled drop-out fuse. Background Art

[0002] Drop-out fuses are commonly used in outdoor high-voltage power systems, such as 10kV transmission and distribution lines and power transformers, as overload and short-circuit protection. Drop-out fuses may require more professional maintenance and repairs because they are usually installed at higher locations and their operation may involve high voltage electricity.

[0003] When the circuit is working normally, the contact spring on the fuse is to provide sufficient tension to maintain the closed state between the static contact and the metal cap at the upper end of the fuse tube. The contact spring will experience multiple compressions and releases throughout the entire service life of the fuse, which may cause metal fatigue and aging. After long-term use, the tension of the contact spring may be affected, which may be insufficient to maintain stable contact between the static contact and the metal cap, easily causing poor contact, which may lead to a gap between the static contact and the metal cap, causing arcing or voltage instability. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent controlled drop-out fuse.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an intelligent controlled drop-out fuse, comprising an insulating member, an inlet terminal disposed at the upper end of the insulating member via an upper bracket, an outlet terminal disposed at the lower end of the insulating member via a lower bracket, a static contact electrically connected to the inlet terminal, and a rain shield fixedly mounted on the upper bracket, wherein the upper bracket is further fixedly mounted with an auxiliary hook, a mounting bracket is fixedly connected to the surface of the insulating member, and further comprising:

[0006] A mounting plate fixedly connected to the top of the static contact;

[0007] an adjustment plate, arranged below the rain shield through a vertical guide mechanism;

[0008] A pressure detection component is fixedly mounted on the bottom of the adjustment plate;

[0009] a contact spring, located between the mounting plate and the adjustment plate, the upper end of the contact spring being connected to the pressure detection member, and the lower end of the contact spring being fixedly connected to the mounting plate;

[0010] A fuse tube, wherein a fuse is provided inside the fuse tube, wherein the metal cap at the upper end of the fuse tube is in electrical contact with the static contact and the lower end of the fuse tube is hung on the lower bracket and in electrical contact with the outlet terminal;

[0011] A tension adjustment mechanism is provided on the top of the rain shield to adjust the tension of the contact spring;

[0012] The intelligent control unit controls the tension adjustment mechanism to adjust the tension of the contact spring according to the pressure information value detected by the pressure detection element.

[0013] When working, the installation bracket is set to facilitate the installation of the fuse on the electrical equipment. The staff will hang the lower end of the fuse tube to the bayonet on the lower bracket, and push the upper end of the fuse tube to the bottom of the static contact, press the static contact to compress the contact spring, so that the metal cap at the upper end of the fuse tube contacts the static contact, and the lower end of the fuse tube contacts the outlet end. With the help of the fuse set inside the fuse tube, the two ends of the fuse are connected to the two ends of the fuse tube respectively, so that the fuse becomes part of the circuit, realizing the connection of the circuit, and working. In the open state, current enters the fuse through the incoming line, flows through the fuse inside the fuse tube, and then is output to the downstream circuit through the outgoing line. When a circuit fault occurs, the fuse will melt due to overheating. The fuse tube will quickly fall from the closed position to the open position due to gravity and its own automatic drop mechanism. The fallen fuse tube can quickly and effectively cut off the circuit. It can be seen that when the circuit is working normally, the role of the contact spring is to provide sufficient tension to keep the fuse tube in the closed state. The contact spring is in the entire fuse During its use cycle, it will experience multiple compressions and releases, which may cause metal fatigue and aging. After long-term use, the tension of the contact spring may indeed be affected, making it insufficient to maintain stable contact between the static contact and the metal cap at the upper end of the fuse tube, which may easily cause poor contact and may further cause a gap between the static contact and the metal cap, causing arcing or voltage instability. Therefore, it is necessary to set a pressure detection device to detect the tension of the contact spring at all times. The pressure detection device will set a pressure range value for the contact spring tension in advance. When the pressure detection device detects that the tension of the contact spring is less than the pressure range value, the intelligent control unit controls the tension adjustment mechanism to operate, and with the help of the tension adjustment mechanism, the adjustment plate is pushed downward along the vertical guide mechanism, thereby intelligently adjusting the tension of the contact spring. After the tension of the contact spring is adjusted to the specified value, the tension adjustment mechanism stops operating, which is conducive to the contact spring providing sufficient tension to maintain stable contact between the static contact and the metal cap at the upper end of the fuse tube, thereby maintaining the normal operation of the circuit.

[0014] Preferably, the vertical guiding mechanism includes:

[0015] A displacement sensor is provided on the side wall of the adjustment plate and is used to detect the downward movement of the adjustment plate. The displacement sensor is connected to an external alarm system.

[0016] Four fixing columns, the four fixing columns are all fixedly connected to the bottom of the rain shield, the adjustment plate is vertically slidably connected to the four fixing columns, and the lower ends of the four fixing columns are all fixedly connected to the limiting plate.

[0017] Preferably, a guide column is fixedly connected to the top of the mounting plate, and an end of the guide column is inserted into the interior of the contact spring.

[0018] Preferably, the tension adjustment mechanism includes:

[0019] Two fine-adjustment components are symmetrically arranged on the surface of the auxiliary hook and are used to adjust the position of the fuse tube;

[0020] A through hole is formed through the top of the rain shield;

[0021] A fixed cover is fixedly mounted on the top of the rain shield, a sealing plug is provided on the inner wall of the fixed cover, a connecting rod is fixedly connected to the bottom of the sealing plug, and the lower end of the connecting rod passes through the through hole and extends downward to be fixedly connected to the adjustment plate;

[0022] a connecting pipe fixedly connected to the top of the fixed cover, wherein an air pressure regulating valve is provided inside the connecting pipe;

[0023] An air pump is fixedly mounted on the top of the rain shield, and an air delivery pipe of the air pump is fixedly connected to the connecting pipe;

[0024] A one-way valve is fixedly installed on the top of the fixed cover.

[0025] Preferably, the fine-tuning component includes an L-shaped plate, the L-shaped plate is fixedly connected to the surface of the auxiliary hook, an electric cylinder is fixedly connected to the inner wall of the L-shaped plate, the piston rod end of the electric cylinder is fixedly connected to a U-shaped frame, and rollers are fixedly installed at both ends of the U-shaped frame.

[0026] Preferably, the intelligent control unit includes:

[0027] The controller controls the operation of the electric cylinder and the air pump according to the pressure information value detected by the pressure detection element;

[0028] The power supply unit is arranged on the top of the rain shield and provides power to the electrical components in the controller and the tension adjustment mechanism.

[0029] Preferably, the power supply unit includes a mounting box, a solar panel is fixedly connected to the top of the mounting box, a battery is installed inside the mounting box, and the solar panel is electrically connected to the battery.

[0030] Preferably, the control method of the pressure detection element includes the following steps:

[0031] When the pressure detection element detects that the tension of the contact spring is less than the pressure range value, a first detection information value is generated;

[0032] The pressure detection element sends the first detection information value to the controller to control the start of the electric cylinder and the air pump;

[0033] When the pressure detecting element detects that the tension of the contact spring reaches a pressure range value, a second detection information value is generated;

[0034] The pressure detecting element sends the second detection information value to the controller to control the air pump to stop supplying gas and to control the piston rod of the electric cylinder to reset.

[0035] Preferably, the control method of the controller includes the following steps:

[0036] After receiving the first detection information value, the controller generates first control information and second control information;

[0037] The controller first sends the first control information to the electric cylinders to start the two electric cylinders. The piston rods of the two electric cylinders use the U-shaped frame to push the rollers on both sides to move toward the middle, fine-tuning the centering of the fuse tube.

[0038] The controller then sends the second control information to the air pump to start the air pump and deliver air to the interior of the fixed cover;

[0039] After receiving the second detection information value, the controller generates third control information and fourth control information;

[0040] The controller first sends the third control information to the electric cylinder, controls the piston rods of the two electric cylinders to reset, and drives the rollers on both sides to reset;

[0041] The controller then sends the fourth control information to the air pump to control the air pump to stop operating.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] First, the contact spring undergoes multiple compressions and releases throughout the life of the fuse, which can lead to metal fatigue and aging. After prolonged use, the contact spring tension may be affected, making it insufficient to maintain stable contact between the stationary contact and the metal cap at the top of the fuse tube, easily causing poor contact. This can lead to a gap between the stationary contact and the metal cap, causing arcing or voltage instability. Therefore, a pressure detector is required to constantly monitor the contact spring tension. The pressure detector pre-sets a pressure range for the contact spring tension within which the contact spring tension can stably maintain contact between the stationary contact and the metal cap. When the pressure detector detects that the contact spring tension is less than the pressure range, the intelligent control unit controls the tension adjustment mechanism, which pushes the adjustment plate downward along the vertical guide mechanism to intelligently adjust the contact spring tension. Once the contact spring tension reaches the specified value, the tension adjustment mechanism stops operating, ensuring that the contact spring provides sufficient tension to maintain stable contact between the stationary contact and the metal cap at the top of the fuse tube, thereby maintaining normal circuit operation.

[0044] 2. When the pressure detection device detects that the tension of the contact spring is less than the set pressure range value, the tension provided by the surface contact spring is insufficient to support the stable contact between the static contact and the metal cap on the upper end of the fuse tube. There may be a gap between the static contact and the metal cap. Since most fuses are installed outdoors, the existing gap may be blown by strong winds from the outside, causing the fuse tube to tilt slightly relative to the stable contact state. Therefore, before adjusting the tension of the contact spring, it is necessary to first adjust the fuse tube to the initial state when the contact spring tension is sufficient. After the controller receives the pressure information value of the pressure detection device, it controls the fine-tuning component to first fine-tune the position of the fuse tube to ensure that the fuse tube does not tilt or deviate, and then controls the air pump to deliver gas to the inside of the connecting pipe. However, no matter how the output pressure of the air pump changes, the air pressure regulating valve inside the connecting pipe can maintain a constant pressure level. , which is conducive to controlling the pressure of gas reaching the inside of the fixed cover and plays a role in safety protection. The gas entering the fixed cover will push the sealing plug downward, and the downward-moving sealing plug will push the adjusting plate equipped with the pressure detection component downward with the help of the connecting rod. The downward-moving adjusting plate will compress the contact spring arranged below it. By compressing the contact spring, the tension of the contact spring is increased, thereby increasing the supporting force of the end of the contact spring on the static contact, so that the tension of the contact spring can maintain stable contact between the static contact and the metal cap at the upper end of the fuse tube, thereby maintaining the normal operation of the circuit. When the contact spring is compressed to a certain extent, the pressure detection component will detect that the tension of the contact spring is restored to the set pressure range value, and then the controller controls the air pump to stop delivering gas to avoid excessive compression of the contact spring caused by continuous delivery of gas, which may cause damage to the static contact and the metal cap, and control the reset of the fine-tuning component.

[0045] 3. By introducing gas into the interior of the fixed cover to push the sealing plug downward, the tension of the contact spring is adjusted. This adjustment process uses gas pressure as a power source. On the one hand, compared with the rigid direct push method used in the existing technology, it is a gentler adjustment, reducing the mechanical impact on the contact spring and the contact point. On the other hand, it can better and more accurately control the movement distance of the sealing plug, thereby improving the accuracy of the tension adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0047] Figure 2 This is a structural diagram of the connection between the upper bracket and the rain shield of the present invention.

[0048] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0049] Figure 4This is a structural schematic diagram of the connection between the sealing plug and the connecting rod of the present invention.

[0050] Figure 5 It is a structural schematic diagram of the connection between the two ends of the contact spring of the present invention.

[0051] Figure 6 This is a flow chart of the pressure detection component control method of the present invention.

[0052] Figure 7 This is a flow chart of the controller control method of the present invention.

[0053] In the figure: 1. Insulator; 2. Upper bracket; 201. Incoming terminal; 3. Lower bracket; 301. Outgoing terminal; 4. Static contact; 5. Rain shield; 6. Attached hook; 7. Mounting frame; 8. Mounting plate; 9. Adjustment plate; 10. Pressure detection component; 11. Contact spring; 12. Fuse tube; 13. Fixing column; 14. Guide column; 15. Sealing plug; 16. Fixing cover; 17. Connecting pipe; 18. Air pressure regulating valve; 19. Air pump; 20. One-way valve; 21. L-shaped plate; 22. Electric cylinder; 23. U-shaped frame; 24. Roller; 25. Controller; 26. Mounting box; 27. Solar panel; 28. Battery; 29. ​​Metal cap; 30. Connecting rod. DETAILED DESCRIPTION

[0054] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0055] like Figures 1 to 5 The intelligent controlled drop-out fuse shown includes an insulating member 1, an inlet terminal 201 provided at the upper end of the insulating member 1 via an upper bracket 2, an outlet terminal 301 provided at the lower end of the insulating member 1 via a lower bracket 3, a static contact 4 electrically connected to the inlet terminal 201, and a rain shield 5 fixedly mounted on the upper bracket 2. An auxiliary hook 6 is also fixedly mounted on the upper bracket 2. A mounting bracket 7 is fixedly connected to the surface of the insulating member 1. The device also includes:

[0056] The mounting plate 8 is fixedly connected to the top of the static contact 4;

[0057] The adjustment plate 9 is arranged below the rain shield 5 through a vertical guide mechanism;

[0058] The pressure detection member 10 is fixedly mounted on the bottom of the adjustment plate 9;

[0059] The contact spring 11 is located between the mounting plate 8 and the adjustment plate 9. The upper end of the contact spring 11 is connected to the pressure detection member 10, and the lower end of the contact spring 11 is fixedly connected to the mounting plate 8.

[0060] A fuse tube 12 is provided with a fuse inside the fuse tube 12. The metal cap 29 at the upper end of the fuse tube 12 is in electrical contact with the static contact 4 and the lower end of the fuse tube 12 is mounted on the lower bracket 3 and in electrical contact with the outlet terminal 301.

[0061] The tension adjustment mechanism is provided on the top of the rain shield 5 to adjust the tension of the contact spring 11;

[0062] The intelligent control unit controls the tension adjustment mechanism to adjust the tension of the contact spring 11 according to the pressure information value detected by the pressure detection member 10; when working, the mounting bracket 7 is provided to facilitate the installation of the fuse on the electrical equipment. The staff will hang the lower end of the fuse tube 12 to the bayonet on the lower bracket 3, and push the upper end of the fuse tube 12 to the bottom of the static contact 4, and press against the static contact 4 to compress the contact spring 11, so that the metal cap 29 at the upper end of the fuse tube 12 contacts the static contact 4, and the lower end of the fuse tube 12 contacts the outlet terminal 301. With the help of the fuse set inside the fuse tube 12, the two ends of the fuse are respectively connected to The two ends of the fuse tube 12, so that the fuse becomes part of the circuit, realizing the connection of the circuit. In the working state, the current enters the fuse through the input terminal 201, flows through the fuse inside the fuse tube 12, and is then output to the downstream circuit through the output terminal 301. When a circuit fault occurs, the fuse will melt due to overheating, and the fuse tube 12 will quickly fall from the closed position to the open position due to gravity and its own automatic falling mechanism. The fallen fuse tube 12 can quickly and effectively cut off the circuit. It can be seen that when the circuit is working normally, the function of the contact spring 11 is to provide sufficient tension to keep the fuse tube 12 in the closed state. The contact spring The spring 11 will experience multiple compressions and releases throughout the life of the fuse, which may lead to metal fatigue and aging. After long-term use, the tension of the contact spring 11 may indeed be affected, which is insufficient to maintain stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12, which may easily cause poor contact, and may further cause a gap between the static contact 4 and the metal cap 29, causing arcing or voltage instability. Therefore, it is necessary to set a pressure detection part 10 to detect the tension of the contact spring 11 at all times. The pressure detection part 10 will set a pressure range value of the tension of the contact spring 11 in advance. Within this pressure range, The tension of the contact spring within the range can stably support the contact between the static contact 4 and the metal cap 29. When the pressure detection component 10 detects that the tension of the contact spring 11 is less than the pressure range value, the intelligent control unit controls the operation of the tension adjustment mechanism, and uses the tension adjustment mechanism to push the adjustment plate 9 downward along the vertical guide mechanism, thereby intelligently adjusting the tension of the contact spring 11. After the tension of the contact spring 11 is adjusted to the specified value, the tension adjustment mechanism stops operating, which is beneficial for the contact spring 11 to provide sufficient tension to maintain stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12, and thus is beneficial for maintaining the normal operation of the circuit.

[0063] As an embodiment of the present invention, the vertical guiding mechanism includes:

[0064] A displacement sensor is provided on the side wall of the adjustment plate 9 and is used to detect the downward movement distance of the adjustment plate 9. The displacement sensor is connected to an external alarm system.

[0065] The four fixing posts 13 are all fixedly connected to the bottom of the rain shield 5, and the adjusting plate 9 is vertically slidably connected to the four fixing posts 13, and the lower ends of the four fixing posts 13 are fixedly connected to the limit plates; during operation, the four fixing posts 13 with limit plates are convenient for installing the adjusting plate 9, and the adjusting plate 9 is sleeved on the surface of the four fixing posts 13, which is convenient for limiting the displacement direction of the adjusting plate 9, limiting the adjusting plate 9 to only move vertically, thereby facilitating the smooth compression of the contact spring 11, and the provided displacement sensor is convenient for monitoring the downward movement distance of the adjusting plate 9 in the process of adjusting the tension of the contact spring 11 when the adjusting plate 9 moves downward. If, during the tension adjustment process, the downward movement distance of the adjusting plate 9 reaches or exceeds the set value of the displacement sensor, it indicates that the tension of the contact spring 11 is seriously insufficient, and the alarm will receive the signal of the displacement sensor and emit an audible and visual alarm, reminding the staff that the contact spring 11 here needs to be replaced.

[0066] As an embodiment of the present invention, a guide column 14 is fixedly connected to the top of the mounting plate 8, and the end of the guide column 14 is inserted into the interior of the contact spring 11; the provided guide column 14 is conducive to limiting the compression or stretching trajectory of the contact spring 11, avoiding the occurrence of distortion when the contact spring 11 is compressed or stretched, thereby improving the stability and service life of the contact spring 11 during operation.

[0067] As an embodiment of the present invention, the tension adjustment mechanism includes:

[0068] Two fine-tuning components are symmetrically arranged on the surface of the auxiliary hook 6 and are used to adjust the position of the fuse tube 12;

[0069] A through hole is formed on the top of the rain shield 5;

[0070] The fixed cover 16 is fixedly mounted on the top of the rain shield 5. A sealing plug 15 is provided on the inner wall of the fixed cover 16. The bottom of the sealing plug 15 is fixedly connected to a connecting rod 30. The lower end of the connecting rod 30 passes through the through hole and extends downward to be fixedly connected to the adjustment plate 9.

[0071] A connecting pipe 17 is fixedly connected to the top of the fixed cover 16, and an air pressure regulating valve 18 is provided inside the connecting pipe 17;

[0072] The air pump 19 is fixedly mounted on the top of the rain shield 5, and the air delivery pipe of the air pump 19 is fixedly connected to the connecting pipe 17;

[0073] The one-way valve 20 is fixedly installed on the top of the fixed cover 16; during operation, when the pressure detection component 10 detects that the tension of the contact spring 11 is less than the set pressure range value, the tension provided by the surface contact spring 11 is insufficient to support the stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12. There may be a gap between the static contact 4 and the metal cap 29. However, since most fuses are installed outdoors, the existing gap may be blown by strong winds from the outside, causing the fuse tube 12 to tilt slightly relative to the stable contact state. Therefore, before adjusting the tension of the contact spring 11, it is necessary to first adjust the fuse tube 12 to the initial state when the tension of the contact spring 11 is sufficient. After the controller 25 receives the pressure information value of the pressure detection component 10, it controls the fine-tuning component to first fine-tune the position of the fuse tube 12 to ensure that the fuse tube 12 does not tilt or deviate, and then controls the air pump 19 to deliver gas to the inside of the connecting pipe 17. However, no matter how the output pressure of the air pump 19 changes, the air pressure regulating valve 18 inside the connecting pipe 17 can maintain Maintaining a constant pressure level is beneficial to controlling the pressure of the gas reaching the inside of the fixed cover 16, which plays a role in safety protection. The gas entering the fixed cover 16 will push the sealing plug 15 downward, and the downward-moving sealing plug 15 pushes the adjusting plate 9 equipped with the pressure detecting element 10 downward with the help of the connecting rod 30. The downward-moving adjusting plate 9 will compress the contact spring 11 arranged thereunder. By compressing the contact spring 11, the tension of the contact spring 11 is increased, thereby increasing the supporting force of the end of the contact spring 11 on the static contact 4, so that the tension of the contact spring 11 can maintain stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12, thereby maintaining the normal operation of the circuit. When the contact spring 11 is compressed to a certain extent, the pressure detecting element 10 will detect that the tension of the contact spring 11 has returned to the set pressure range value, and then the controller 25 controls the air pump 19 to stop delivering gas, so as to avoid the situation where the contact spring 11 is over-compressed due to continuous delivery of gas, which may cause damage to the static contact 4 and the metal cap 29, and control the fine-tuning component to reset;

[0074] The one-way valve 20 is provided. When the staff replaces the new contact spring 11 and the adjustment plate 9 pushes the connecting column connected to the sealing plug 15 to move upward and reset, the one-way valve 20 can control the outward flow of gas inside the fixed cover 16 above the sealing plug 15. When the sealing plug 15 moves upward along the inner wall of the fixed cover 16, the pressure balance inside and outside the fixed cover 16 is maintained.

[0075] By introducing gas into the interior of the fixed cover 16 to push the sealing plug 15 downward, the tension of the contact spring 11 is adjusted. This adjustment process uses gas pressure as a power source. On the one hand, compared with the rigid direct push method used in the prior art, it is a gentler adjustment, reducing the mechanical impact on the contact spring 11 and the contact point. On the other hand, it can better and more accurately control the moving distance of the sealing plug 15, thereby improving the accuracy of the tension adjustment.

[0076] As an embodiment of the present invention, the fine-tuning component includes an L-shaped plate 21, which is fixedly connected to the surface of the auxiliary hook 6. The inner wall of the L-shaped plate 21 is fixedly connected to an electric cylinder 22, and the piston rod end of the electric cylinder 22 is fixedly connected to a U-shaped frame 23. The two ends of the U-shaped frame 23 are respectively fixedly installed with rollers 24. When working, before the air pump 19 is started, the controller 25 first controls the electric cylinder 22 to start, and the piston rod of the electric cylinder 22 will push the U-shaped frame 23 connected to the roller 24 to move toward the direction of the fuse tube 12. If the fuse tube 12 is slightly tilted, the rolling surface of the roller 24 will contact the metal at the upper end of the fuse tube 12. The metal cap 29 contacts the surface of the metal cap 29, and as the roller 24 continues to move, the rolling surface of the roller 24 will push the surface of the metal cap 29, pushing the metal cap 29 to the middle of the U-shaped frame 23, thereby restoring the initial placement position of the fuse tube 12, and avoiding the situation where the tilted placement of the fuse tube 12 affects the tension adjustment of the contact spring 11. When the air pump 19 completes the tension adjustment of the contact spring 11, the controller 25 controls the piston rod of the electric cylinder 22 to reset, thereby pulling the roller 24 to reset, and avoiding the situation where the roller 24 located on the side of the metal cap 29 blocks the automatic falling of the fuse tube 12 in the later stage.

[0077] As an embodiment of the present invention, the intelligent control unit includes:

[0078] The controller 25 controls the operation of the electric cylinder 22 and the air pump 19 according to the pressure information value detected by the pressure detection element 10;

[0079] The power supply unit is arranged on the top of the rain shield 5 and provides power to the controller 25 and electrical components in the tension adjustment mechanism.

[0080] As an embodiment of the present invention, the power supply unit includes an installation box 26, a solar panel 27 is fixedly connected to the top of the installation box 26, a battery 28 is installed inside the installation box 26, and the solar panel 27 is electrically connected to the battery 28; when working, the solar panel 27 absorbs light and converts solar energy into electrical energy through the photovoltaic effect. The generated electrical energy can be supplied to the controller 25, the electric cylinder 22 and the air pump 19. The provided battery 28 can store the electrical energy for use when there is no sunlight.

[0081] like Figure 6The control method of the pressure detection member 10 shown includes the following steps:

[0082] When the pressure detection element 10 detects that the tension of the contact spring 11 is less than the pressure range value, a first detection information value is generated;

[0083] The pressure detection element 10 sends the first detection information value to the controller 25 to control the electric cylinder 22 and the air pump 19 to start;

[0084] When the pressure detection element 10 detects that the tension of the contact spring 11 reaches the pressure range value, a second detection information value is generated;

[0085] The pressure detecting element 10 sends the second detection information value to the controller 25 to control the air pump 19 to stop supplying air and to control the piston rod of the electric cylinder 22 to reset.

[0086] like Figure 7 The control method of the controller 25 shown includes the following steps:

[0087] After receiving the first detection information value, the controller 25 generates first control information and second control information;

[0088] The controller 25 first sends the first control information to the electric cylinders 22 to start the two electric cylinders 22. The piston rods of the two electric cylinders 22 push the rollers 24 on both sides to move toward the middle with the help of the U-shaped frame 23, so as to fine-tune the centering of the fuse tube 12.

[0089] The controller 25 then sends the second control information to the air pump 19 to start the air pump 19 and deliver air to the interior of the fixed cover 16;

[0090] After receiving the second detection information value, the controller 25 generates third control information and fourth control information;

[0091] The controller 25 first sends the third control information to the electric cylinder 22, controls the piston rods of the two electric cylinders 22 to reset, and drives the rollers 24 on both sides to reset;

[0092] The controller 25 then sends the fourth control information to the air pump 19 to control the air pump 19 to stop operating.

[0093] Working principle of the present invention: The mounting bracket 7 is provided to facilitate the installation of the fuse on the electrical equipment. The staff will hang the lower end of the fuse tube 12 to the bayonet on the lower bracket 3, and push the upper end of the fuse tube 12 to the bottom of the static contact 4, and press against the static contact 4 to compress the contact spring 11, so that the metal cap 29 at the upper end of the fuse tube 12 contacts the static contact 4, and the lower end of the fuse tube 12 contacts the outlet terminal 301. With the help of the fuse arranged inside the fuse tube 12, the two ends of the fuse are respectively connected to the two ends of the fuse tube 12, so that the fuse becomes part of the circuit, realizing the connection of the circuit, and the working state is In the open state, current enters the fuse through the inlet terminal 201, flows through the fuse inside the fuse tube 12, and is then output to the downstream circuit through the outlet terminal 301. When a circuit fault occurs, the fuse will melt due to overheating, and the fuse tube 12 will quickly fall from the closed position to the open position due to gravity and its own automatic falling mechanism. The fallen fuse tube 12 can quickly and effectively cut off the circuit. It can be seen that when the circuit is working normally, the function of the contact spring 11 is to provide sufficient tension to keep the fuse tube 12 in the closed state. The contact spring 11 will experience multiple compressions during the entire service life of the fuse. And release, which may lead to metal fatigue and aging. After long-term use, it may indeed affect the tension of the contact spring 11, which is insufficient to maintain stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12, which may easily cause poor contact, and may further cause a gap between the static contact 4 and the metal cap 29, causing arcing or voltage instability. Therefore, it is necessary to set a pressure detection part 10 to detect the tension of the contact spring 11 at all times. The pressure detection part 10 will set a pressure range value of the tension of the contact spring 11 in advance. The tension of the contact spring can be adjusted within this pressure range. It is sufficient to stably support the contact between the static contact 4 and the metal cap 29. When the pressure detection component 10 detects that the tension of the contact spring 11 is less than the pressure range value, the intelligent control unit controls the operation of the tension adjustment mechanism, and uses the tension adjustment mechanism to push the adjustment plate 9 downward along the vertical guide mechanism, thereby intelligently adjusting the tension of the contact spring 11. After the tension of the contact spring 11 is adjusted to the specified value, the tension adjustment mechanism stops operating, which is beneficial for the contact spring 11 to provide sufficient tension to maintain stable contact between the static contact 4 and the metal cap 29 at the upper end of the fuse tube 12, thereby maintaining the normal operation of the circuit.

[0094] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. An intelligent controlled drop-out fuse, comprising an insulating member (1), an inlet terminal (201) arranged at the upper end of the insulating member (1) through an upper bracket (2), an outlet terminal (301) arranged at the lower end of the insulating member (1) through a lower bracket (3), a static contact (4) electrically connected to the inlet terminal (201), and a rain shield (5) fixedly mounted on the upper bracket (2), wherein an auxiliary hook (6) is also fixedly mounted on the upper bracket (2), and a mounting frame (7) is fixedly connected to the surface of the insulating member (1), characterized in that: Also includes: A mounting plate (8) fixedly connected to the top of the stationary contact (4); An adjustment plate (9) is arranged below the rain shield (5) via a vertical guiding mechanism; A pressure detection member (10) is fixedly mounted on the bottom of the adjustment plate (9); A contact spring (11) is located between the mounting plate (8) and the adjustment plate (9), the upper end of the contact spring (11) being connected to the pressure detection member (10), and the lower end of the contact spring (11) being fixedly connected to the mounting plate (8); A fuse tube (12), wherein a fuse is arranged inside the fuse tube (12), wherein a metal cap (29) at the upper end of the fuse tube (12) is in electrical contact with the static contact (4), and a lower end of the fuse tube (12) is mounted on the lower bracket (3) and is in electrical contact with the outlet terminal (301); A tension adjustment mechanism, arranged on the top of the rain shield (5), for adjusting the tension of the contact spring (11); An intelligent control unit controls the tension adjustment mechanism to adjust the tension of the contact spring (11) according to the pressure information value detected by the pressure detection element (10); The tension adjustment mechanism comprises: A through hole is formed through the top of the rain shield (5); A fixed cover (16) is fixedly mounted on the top of the rain shield (5), a sealing plug (15) is provided on the inner wall of the fixed cover (16), a connecting rod (30) is fixedly connected to the bottom of the sealing plug (15), and the lower end of the connecting rod (30) passes through the through hole and extends downward to be fixedly connected to the adjustment plate (9); A connecting pipe (17) fixedly connected to the top of the fixed cover (16), wherein an air pressure regulating valve (18) is arranged inside the connecting pipe (17); An air pump (19) is fixedly mounted on the top of the rain shield (5), and an air delivery pipe of the air pump (19) is fixedly connected to the connecting pipe (17); A one-way valve (20) is fixedly mounted on the top of the fixed cover (16).

2. The intelligent controlled drop-out fuse according to claim 1, characterized in that: The vertical guiding mechanism comprises: A displacement sensor, arranged on a side wall of the adjustment plate (9), for detecting a distance the adjustment plate (9) moves downward, the displacement sensor being connected to an external alarm system; Four fixing columns (13), the four fixing columns (13) are all fixedly connected to the bottom of the rain shield (5), the adjustment plate (9) is vertically slidably connected to the four fixing columns (13), and the lower ends of the four fixing columns (13) are all fixedly connected to a limiting plate.

3. The intelligent controlled drop-out fuse according to claim 1, characterized in that: A guide column (14) is fixedly connected to the top of the mounting plate (8), and an end of the guide column (14) is inserted into the interior of the contact spring (11).

4. The intelligent controlled drop-out fuse according to claim 1, characterized in that: The tension adjustment mechanism also includes: Two fine-adjustment components are symmetrically arranged on the surface of the auxiliary hook (6) and are used to adjust the position of the fuse tube (12).

5. The intelligent controlled drop-out fuse according to claim 4, characterized in that: The fine-tuning component comprises an L-shaped plate (21), the L-shaped plate (21) being fixedly connected to the surface of the attached hook (6), an electric cylinder (22) being fixedly connected to the inner wall of the L-shaped plate (21), a U-shaped frame (23) being fixedly connected to the end of the piston rod of the electric cylinder (22), and rollers (24) being fixedly mounted on both ends of the U-shaped frame (23).

6. The intelligent controlled drop-out fuse according to claim 5, characterized in that: The intelligent control unit comprises: A controller (25) controls the operation of the electric cylinder (22) and the air pump (19) according to the pressure information value detected by the pressure detection element (10); A power supply unit is arranged on the top of the rain shield (5) and provides power to the controller (25) and electrical components in the tension adjustment mechanism.

7. The intelligent controlled drop-out fuse according to claim 6, characterized in that: The power supply unit comprises a mounting box (26), a solar panel (27) being fixedly connected to the top of the mounting box (26), a storage battery (28) being installed inside the mounting box (26), and the solar panel (27) being electrically connected to the storage battery (28).

8. The intelligent controlled drop-out fuse according to claim 6, characterized in that: The control method of the pressure detection element (10) comprises the following steps: When the pressure detection element (10) detects that the tension of the contact spring (11) is less than the pressure range value, a first detection information value is generated; The pressure detection element (10) sends a first detection information value to the controller (25) to control the start of the electric cylinder (22) and the air pump (19); When the pressure detection element (10) detects that the tension of the contact spring (11) reaches a pressure range value, a second detection information value is generated; The pressure detection element (10) sends the second detection information value to the controller (25) to control the air pump (19) to stop supplying air and to control the piston rod of the electric cylinder (22) to reset.

9. The intelligent controlled drop-out fuse according to claim 8, characterized in that: The control method of the controller (25) comprises the following steps: After receiving the first detection information value, the controller (25) generates first control information and second control information; The controller (25) first sends the first control information to the electric cylinder (22) to control the two electric cylinders (22) to start, and the piston rods of the two electric cylinders (22) push the rollers (24) on both sides to move toward the middle with the help of the U-shaped frame (23), so as to fine-tune the centering of the fuse tube (12); The controller (25) then sends the second control information to the air pump (19), controls the air pump (19) to start, and delivers airflow into the interior of the fixed cover (16); After receiving the second detection information value, the controller (25) generates third control information and fourth control information; The controller (25) first sends the third control information to the electric cylinder (22), controls the piston rods of the two electric cylinders (22) to reset, and drives the rollers (24) on both sides to reset; The controller (25) then sends the fourth control information to the air pump (19) to control the air pump (19) to stop operating.

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