Wide voltage adaptation electronic device overcurrent protection device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUILIN NORMAL COLLEGE
- Filing Date
- 2026-03-02
- Publication Date
- 2026-07-07
Smart Images
Figure CN122348482A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electronic circuit technology, specifically to an overcurrent protection device for wide voltage-adaptive electronic equipment. Background Technology
[0002] Against the backdrop of rapid development in electronic information technology and power electronics technology, the application scenarios of electronic devices are constantly expanding. Significant differences exist in the power supply voltage under different usage scenarios, such as civilian, industrial, and portable mobile applications. Furthermore, natural fluctuations in grid voltage and the access of different power standards mean that electronic devices face diverse input voltage environments. Wide voltage adaptability has become an important design direction in electronic device circuit design to improve the environmental adaptability and universal compatibility of equipment. Overcurrent protection, as a fundamental safety protection function of electronic devices, is a key design feature to ensure the stable operation of internal circuits and components, preventing device burnout and equipment failure due to circuit overcurrent. Its design rationality directly affects the operational reliability and service life of electronic devices. Simultaneously, with the trend of electronic devices towards miniaturization, integration, and multi-functionality, the market demand for protection devices that combine wide voltage adaptability with stable overcurrent protection performance continues to increase. The continuous iteration and maturation of various circuit protection technologies and voltage adaptability technologies have laid a solid technical foundation for the research and application of overcurrent protection devices for wide voltage adaptable electronic devices, enabling them to better adapt to different types and power levels of electronic devices and meet the safe operation requirements of various electronic devices under complex power supply conditions.
[0003] However, existing conventional overcurrent protection devices suitable for wide voltage-adaptive electronic equipment have poor fire-retardant performance in actual daily use. They are prone to being destroyed by fire due to short circuits in electronic or electrical equipment, resulting in significant economic losses.
[0004] Therefore, an overcurrent protection device for wide voltage-adaptive electronic equipment is proposed. Summary of the Invention
[0005] The purpose of this invention is to provide an overcurrent protection device for wide voltage-adaptive electronic devices, so as to solve the problem of poor fire resistance and flame retardancy of the overcurrent protection device for wide voltage-adaptive electronic devices mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an overcurrent protection device for wide voltage-adaptive electronic equipment, comprising: Overcurrent protection structure; The overcurrent protection structure includes a wide voltage overcurrent protection box with a sealed, manually locked door. The back of the wide voltage overcurrent protection box is symmetrically fixed with mounting bases along the center. The wide voltage overcurrent protection box is assembled to the corresponding position of the circuit to be protected through the mounting bases. The wide voltage overcurrent protection box has a liquid chamber isolated behind each functional module. A piston partition is slidably arranged inside the liquid chamber to fit its inner wall. Several hydraulic springs are elastically connected between the piston partition and the inner wall of the liquid chamber near the functional module. The piston partition divides the liquid chamber into a first chamber and a second chamber. The wide voltage overcurrent protection box has several L-shaped connecting liquid channels extending from the left and right inner walls of the second chamber into the functional module configuration space. The box also has a ventilation chamber connected to the connecting liquid channels. A telescopic sliding frame is slidably installed in the ventilation chamber. The telescopic sliding frame is fixedly connected to the connecting liquid channels by a hydraulic telescopic pipe. The lower part of the liquid chamber of the wide voltage overcurrent protection box is connected to a T-shaped conduit fixed to the lower side of the mounting base through a hole at the axis of the mounting base. The front side of the conduit is integrally formed with an assembly baffle adapted to a universal wire groove. The surface of the assembly baffle is provided with assembly holes for assembling electrical connection components. The conduit has a movable conduit extending from the cavity to the surface of the assembly baffle. A piston rod is slidably installed inside the movable conduit. A buffer spring is sleeved on the piston rod. The buffer spring is elastically connected between the piston head of the piston rod and the inner wall of the movable conduit. The end of the piston rod extends out of the assembly baffle and is fixedly connected to the power-off gasket.
[0007] Preferably, the first chamber of the liquid cavity is a chamber without a hydraulic spring and stores a heat-sensitive liquid, and the second chamber is a chamber equipped with a hydraulic spring and stores a flame-retardant material.
[0008] Preferably, the ventilation chamber is arranged along both sides of the functional module and corresponds to the ventilation window on the side of the wide voltage overcurrent protection box.
[0009] Preferably, the height of the ventilation chamber is greater than the height of the ventilation window, the inner and outer plates of the telescopic sliding frame are both sealed at the same height, the innermost plate of the telescopic sliding frame is provided with a number of semi-open cylindrical slots to the connecting liquid channel, and the two ends of the hydraulic telescopic pipe are fixedly connected to the end wall of the cylindrical slot and the port of the connecting liquid channel, respectively.
[0010] Preferably, the hydraulic telescopic tube is a telescopic sleeve structure, with the outermost sleeve and the innermost sleeve being elastically connected end-to-end by a built-in return spring. The return spring is used to reset the extended hydraulic telescopic tube after manual depressurization.
[0011] Preferably, the hydraulic telescopic pipe is equipped with a pressure relief valve, and one end of the hydraulic telescopic pipe connected to the telescopic slide frame has an L-shaped immersion liquid channel extending from the inside of the hydraulic telescopic pipe into the inside of the telescopic slide frame. The through end of the immersion liquid channel faces the connection between the internal functional module space and the ventilation window of the wide voltage overcurrent protection box.
[0012] Preferably, the telescopic sliding frame has a protruding card insertion strip on the side facing the ventilation window.
[0013] Preferably, the moving pipeline has a stepped structure, and its opening position does not interfere with the assembly hole position on the assembly baffle. The rod end of the piston rod extends out of the assembly baffle radially along the moving pipeline.
[0014] Preferably, the power-off pad is made of non-metallic material and is arranged around the periphery of the assembly hole. The surface of the assembly baffle is also provided with a number of screw holes for assembly and fixing.
[0015] Preferably, the mounting base and the wide voltage overcurrent protection box are detachably connected by bolts, and the extension stroke of the hydraulic telescopic pipe is adapted to the sliding stroke of the telescopic slide frame in the ventilation chamber.
[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a wide-voltage overcurrent protection box equipped with a liquid chamber, piston baffle, and hydraulic spring. The box panel contains a connecting liquid channel, a ventilation chamber, a telescopic slide frame, and a hydraulic telescopic pipe. The hydraulic telescopic pipe has a built-in reset spring and a pressure relief valve. The telescopic slide frame is integrated with the immersion liquid channel. When the fire is at high temperature, the expansion of the heat-sensitive liquid can push the piston baffle to squeeze the flame-retardant material. The material enters the hydraulic telescopic pipe through the connecting liquid channel and drives the telescopic slide frame to block the ventilation window. After the pressure reaches the target, the pressure relief valve opens, and the flame-retardant material fills the module space inside the box along the immersion liquid channel. This not only realizes the automatic thermal triggering of the flame-retardant mechanism, improving the timeliness of the protection response and the sealing flame-retardant effect, but also enables the controllable and directional release of the flame-retardant material. This invention connects a wide-voltage overcurrent protection box to a T-shaped conduit, and a stepped moving pipe is opened inside the conduit with a piston rod and a buffer spring slidably configured. At the same time, the piston rod end is connected to a non-metallic power-off gasket surrounding the assembly hole. When an external device short-circuits and catches fire, the heat radiation causes the heat-sensitive liquid inside the conduit to expand, which in turn pushes the piston rod to compress the buffer spring and moves the power-off gasket, quickly achieving power-off separation between the socket and the plugged electronic device, cutting off the power supply circuit from the source, avoiding the continuous power supply from aggravating the fire, and realizing active electrical and fire separation protection in the event of a fire. This invention integrates thermally sensitive conduit power-off protection with wide-voltage overcurrent protection box flame-retardant protection. In the event of a fire, it can simultaneously trigger power-off and flame-retardant dual protection actions, forming a closed-loop protection system of overcurrent monitoring, fire power-off, and flame-retardant extinguishing. This system provides comprehensive protection for wide-voltage compatible electronic equipment circuits from damage caused by overcurrent and fire, effectively solving the problem of poor fire-retardant performance of traditional wide-voltage compatible electronic equipment overcurrent protection devices. Attached Figure Description
[0017] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention from the front and back directions at the central position; Figure 3 This is a cross-sectional view of the overall structure of the present invention from the left and right directions at the center position; Figure 4 This is a cross-sectional view of the overall structure of the present invention at the piston rod position; Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view at point B in the middle; Figure 7 This is a schematic diagram of the overall structure of the present invention from the rear. Figure 8 This is an exploded view of the overall structure of the present invention; Figure 9 This is a schematic diagram of the overall structure of the conduit and its connection structure according to the present invention.
[0018] In the picture: 1. Overcurrent protection structure; 11. Wide voltage and overcurrent protection box; 111. Mounting base; 112. Liquid chamber; 113. Piston partition; 114. Hydraulic spring; 115. Ventilation chamber; 116. Telescopic slide frame; 1161. Immersion liquid channel; 117. Hydraulic telescopic pipe; 1171. Pressure relief valve; 1172. Return spring; 118. Connecting liquid channel; 12. Conduit; 121. Assembly baffle; 122. Moving pipeline; 123. Piston rod; 124. Buffer spring; 125. Power-off gasket. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figures 1 to 9 This invention provides a technical solution for an overcurrent protection device for wide voltage-adaptive electronic equipment: A wide voltage-adaptive electronic device overcurrent protection device, comprising: The overcurrent protection structure 1 includes a wide voltage adaptation module, a current detection module, a main control module, a protection execution module, and a power supply module. The modules work together to achieve the functions of wide voltage range adaptation and overcurrent monitoring and protection. The overcurrent protection structure 1 includes a wide voltage overcurrent protection box 11 with a sealed, manually locked box door. The back of the wide voltage overcurrent protection box 11 is symmetrically connected to the mounting base 111 along the center by bolts. The wide voltage overcurrent protection box 11 is configured in conjunction with the mounting base 111 at the circuit location to be protected. The wide voltage overcurrent protection box 11 is connected to the T-shaped conduit 12 fixed to the lower side of the mounting base 111 through a channel located at the center of the mounting base 111 on the lower side of the back of the wide voltage overcurrent protection box 11. The conduit 12 is located on the lower rear side of the wide voltage overcurrent protection box 11, and the front side of the conduit 12 is integrally equipped with an assembly baffle 121 that matches the universal wire trough. The surface of the assembly baffle 121 is provided with holes for facilitating the assembly of electrical components such as sockets. A stepped moving pipe 122 is provided inside the conduit 12, extending from the inside of the pipe to the surface of the assembly baffle 121. The position of the moving pipe 122 does not interfere with the assembly holes. The surface of the assembly baffle 121 is provided with screw holes for easy assembly. A piston rod 123 is slidably arranged inside the moving pipe 122, and a pair of piston rods is sleeved on the rod body of the piston rod 123. The plug is elastically connected to the inner wall of the moving pipe 122 by a buffer spring 124. The rod end of the piston rod 123 protrudes radially through the moving pipe 122 from the mounting baffle 121 and is fixed to the non-metallic power-off pad 125 surrounding the mounting holes on the surface of the mounting baffle 121. Thus, when a fire occurs in the electronic power equipment connected to the socket or other electrical components due to a short circuit, heat will be radiated through the mounting baffle 121 to the heat-sensitive liquid stored inside the conduit 12, causing the heat-sensitive liquid to expand and conduct heat quickly. The expanded heat-sensitive liquid inside the conduit 12 will preferentially act on the piston end of the piston rod 123, pushing the piston rod 123 to compress the buffer spring 124 and move it along the moving pipe 122. During the outward movement, it will push the power-off pad 125 to move, thereby achieving rapid power-off separation of the electronic power equipment plugged into the socket.
[0021] During operation, the overcurrent protection structure 1, in conjunction with core modules such as wide voltage adaptation, current detection, and main control, completes wide voltage circuit adaptation and overcurrent monitoring and protection. When a fire occurs in the wide voltage overcurrent protection box 11 or on the external equipment connected to the baffle 121, the heat causes the heat-sensitive liquid in the conduit 12 to expand, pushing the piston rod 123 to drive the non-metallic power-off pad 125 to disconnect the socket from the equipment. This cuts off the power at the source and, combined with flame retardancy, forms a double protection, providing comprehensive protection for the circuits of wide voltage-adapted electronic equipment from overcurrent and fire damage.
[0022] In summary, by configuring a liquid chamber 112, a piston baffle 113, and a hydraulic spring 114 inside the wide voltage overcurrent protection box 11, and arranging a connecting liquid channel 118, a ventilation chamber 115, a telescopic slide frame 116, and a hydraulic telescopic pipe 117 inside the box, and with a built-in return spring 1172 and a pressure relief valve 1171 in the hydraulic telescopic pipe 117, and the telescopic slide frame 116 being integrated with the immersion liquid channel 1161, the heat-sensitive liquid expands during high-temperature fires, pushing the piston baffle 113 to squeeze the flame-retardant material. The material then enters the hydraulic telescopic pipe 117 through the connecting liquid channel 118 and drives the telescopic slide frame 116 to block the ventilation window. After the pressure reaches the target, the pressure relief valve 1171 opens, and the flame-retardant material fills the module space inside the box along the immersion liquid channel 1161. This achieves automatic heat-sensing triggering of the flame-retardant mechanism, improving the timeliness of the protection response and the sealing flame-retardant effect, and also enables the controllable and directional release of the flame-retardant material.
[0023] As one embodiment of the present invention, such as Figures 1 to 5As shown, the interior of the wide voltage overcurrent protection box 11 has a liquid chamber 112 isolated on the rear side of each module. A piston baffle 113 is fitted inside the liquid chamber 112 and moves along its inner wall. A sealing ring is provided on the side of the piston baffle 113 for sealing. Multiple hydraulic springs 114 are elastically connected between one side of the piston baffle 113 and the inner wall of the liquid chamber 112 near each module inside the wide voltage overcurrent protection box 11. The liquid chamber 112 isolated by the piston baffle 113 and without hydraulic springs 114 stores heat-sensitive liquids such as silicone oil, mineral oil, polyols, and aqueous solutions. The liquid chamber 112 isolated by the piston baffle 113 and equipped with hydraulic springs 114 stores flame-retardant materials, with flame-retardant materials being preferred. Gases such as IG541 and heptafluoropropane are selected. The interior of the wide-voltage overcurrent protection box 11, extending from the left and right inner walls of the liquid chamber 112 (containing flame-retardant material) into the space where each module is configured, contains multiple L-shaped connecting liquid channels 118 and ventilation chambers 115 located on both sides of each module within the box. These ventilation chambers 115 correspond to ventilation windows on the sides of the wide-voltage overcurrent protection box 11 that ventilate the space where each module is configured. The height of the ventilation chambers 115 is greater than that of the ventilation windows. Inside the ventilation chambers 115, near the connecting liquid channels 118, is a telescopic sliding frame 116 that extends and retracts along the inner wall of the ventilation chamber 115. The telescopic sliding frame 116 extends and retracts along its inner and outer sides. The plates are uniformly sealed at the same height. The innermost plate of the telescopic slide frame 116 has multiple semi-open cylindrical slots corresponding to the connecting liquid channel 118. The end walls of these slots are fixedly connected to the ports of the connecting liquid channel 118 via a telescopic hydraulic telescopic pipe 117. The outermost and innermost sleeves of the hydraulic telescopic pipe 117 are connected end-to-end by a built-in return spring 1172, allowing for active reset by manual pressure relief after extension. One end of the hydraulic telescopic pipe 117 connected to the telescopic slide frame 116 has an L-shaped immersion liquid channel 1161 extending from the inside of the hydraulic telescopic pipe 117 into the inside of the telescopic slide frame 116, penetrating to the side of the telescopic slide frame 116. The through end of 61 points to the ventilation window that connects to the internal modules of the wide voltage overcurrent protection box 11. The side of the telescopic slide frame 116 that outputs has a protruding insert strip to ensure sealing. The extension stroke of the hydraulic telescopic tube 117 is adapted to the sliding stroke of the telescopic slide frame 116 in the ventilation chamber 115. Thus, after the heat-sensitive liquid stored in the liquid chamber 112 expands due to heat, it pushes the piston partition 113 to compress the hydraulic spring 114, squeezing the flame-retardant material stored in the liquid chamber 112 into the hydraulic telescopic tube 117 through the connecting liquid channel 118. This causes the hydraulic telescopic tube 117 to extend by compressing the return spring 1172, and simultaneously stretches the telescopic slide frame 116 to block the ventilation window on the side of the wide voltage overcurrent protection box 11.Then, as the flame-retardant material continues to flow into the hydraulic telescopic tube 117, the increased internal pressure forces the pressure relief valve 1171 to open. The flame-retardant material then passes through the pressure relief valve 1171, travels along the telescopic slide frame 116, and through the ventilation window connected to the inside of the wide-voltage overcurrent protection box 11, entering the various module configuration spaces within the box. This fills each module configuration space with flame-retardant material, enhancing the flame-retardant and fire-resistant capabilities of the wide-voltage overcurrent protection box 11.
[0024] When a fire occurs inside the wide voltage overcurrent protection box 11 or on the external equipment connected to the baffle 121, the heat-sensitive liquid in the liquid chamber 112 expands due to heat, pushing the piston baffle 113 to squeeze the flame-retardant material through the connecting liquid channel 118 into the hydraulic telescopic pipe 117. Its extension pulls the telescopic slide frame 116 to seal the ventilation window. Subsequently, the pressure relief valve 1171 opens, and the flame-retardant material fills the module configuration space inside the wide voltage overcurrent protection box 11 to form flame-retardant protection.
[0025] In summary, by connecting a wide-voltage overcurrent protection box 11 to a T-shaped conduit 12, and having a stepped movable conduit 122 inside the conduit 12 with a sliding piston rod 123 and a buffer spring 124, and with a non-metallic power-off pad 125 connected to the end of the piston rod 123 surrounding the mounting hole, when an external device short-circuits and catches fire, the heat radiation causes the heat-sensitive liquid inside the conduit 12 to expand, thereby pushing the piston rod 123 to compress the buffer spring 124 and causing the power-off pad 125 to move. This quickly disconnects the socket from the plugged-in electronic equipment, cutting off the power at the source. The power supply circuit avoids the continuous power supply from exacerbating the fire and achieves active electrical-fire separation protection in the event of a fire. By linking the thermally sensitive conduit 12 power-off protection with the wide-voltage overcurrent protection box 11 flame-retardant protection, the power-off and flame-retardant dual protection actions can be triggered simultaneously when a fire occurs, forming a closed-loop protection system of overcurrent monitoring, fire power-off, and flame-retardant extinguishing. This system provides comprehensive protection for wide-voltage compatible electronic equipment circuits from damage caused by overcurrent and fire, effectively solving the problem of poor fire-retardant performance of traditional wide-voltage compatible electronic equipment overcurrent protection devices.
[0026] Working Principle: During operation, the core modules in the overcurrent protection structure 1, such as the wide voltage adaptation module, current detection module, and main control module, work together to complete circuit adaptation and real-time overcurrent monitoring and protection under different voltage environments, providing basic overcurrent protection for electronic equipment circuits. When the module area inside the wide voltage overcurrent protection box 11 experiences high temperatures due to circuit faults, or even a fire, or when electronic equipment connected to the electrical components at the assembly baffle 121 experiences a fire due to a short circuit, the heat-sensitive liquid in the liquid chamber 112 inside the wide voltage overcurrent protection box 11 expands due to heat, pushing the piston baffle 113 to compress the hydraulic spring 114. This compresses the flame-retardant material in the liquid chamber 112 and enters the hydraulic telescopic tube 117 through the connecting liquid channel 118. The hydraulic telescopic tube 117 compresses the reset spring 1172, extends it, and simultaneously pulls the telescopic slide frame 1. 16. The ventilation window of the wide voltage overcurrent protection box 11 is sealed by the insert card protrusion. Then, the pressure inside the hydraulic telescopic pipe 117 increases and opens the pressure relief valve 1171. The flame-retardant material enters the module configuration space inside the wide voltage overcurrent protection box 11 through the immersion liquid channel 1161 and fills it, forming a highly efficient flame-retardant and fireproof protection. At the same time, heat is radiated from the assembly baffle 121 or the inside of the liquid cavity 112 to the heat-sensitive liquid in the conduit 12, causing it to expand and push the piston rod 123 to compress the buffer spring 124 and move along the moving pipe 122. The piston rod 123 drives the non-metallic power-off pad 125 to move synchronously, quickly realizing the power-off separation of the socket and the plugged electronic equipment, cutting off the circuit from the source. Combined with flame-retardant protection, it forms a double safety guarantee, protecting the circuit of wide voltage compatible electronic equipment from damage by overcurrent and fire.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An overcurrent protection device for wide voltage-adaptive electronic equipment, comprising: Overcurrent protection structure (1); The overcurrent protection structure (1) includes a wide voltage overcurrent protection box (11) with a sealed manual locking box door. The back of the wide voltage overcurrent protection box (11) is symmetrically fixed with mounting bases (111) along the center. The wide voltage overcurrent protection box (11) is assembled to the corresponding position of the circuit to be protected through the mounting bases (111). Its features are: The wide voltage overcurrent protection box (11) has a liquid chamber (112) isolated behind each functional module inside. A piston partition (113) is slidably arranged inside the liquid chamber (112) to fit its inner wall. Several hydraulic springs (114) are elastically connected between the piston partition (113) and the inner wall of the liquid chamber (112) near the functional module. The piston partition (113) divides the liquid chamber (112) into a first chamber and a second chamber. The wide voltage overcurrent protection box (11) has several L-shaped connecting liquid channels (118) extending from the left and right inner walls of the second chamber to the functional module configuration space inside the box plate. The box plate also has a ventilation chamber (115) connected to the connecting liquid channels (118). A telescopic slide frame (116) is slidably arranged in the ventilation chamber (115). The telescopic slide frame (116) and the connecting liquid channels (118) are fixedly connected by a hydraulic telescopic pipe (117). The lower part of the liquid cavity (112) of the wide voltage overcurrent protection box (11) is connected to the T-shaped conduit (12) fixed to the lower side of the mounting base (111) through the hole at the axis of the mounting base (111). The front side of the conduit (12) is integrally formed with an assembly baffle (121) adapted to the universal wire groove. The surface of the assembly baffle (121) is provided with assembly holes for assembling electrical connection components. The conduit (12) has a movable conduit (122) extending from the cavity to the surface of the assembly baffle (121). A piston rod (123) is slidably disposed inside the movable conduit (122). A buffer spring (124) is sleeved on the rod of the piston rod (123). The buffer spring (124) is elastically connected between the piston head of the piston rod (123) and the inner wall of the movable conduit (122). The rod end of the piston rod (123) extends out of the assembly baffle (121) and is fixedly connected to the power-off gasket (125).
2. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The first chamber of the liquid cavity (112) is a chamber without a hydraulic spring (114) and stores a heat-sensitive liquid, and the second chamber is a chamber equipped with a hydraulic spring (114) and stores a flame-retardant material.
3. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The ventilation chamber (115) is arranged along both sides of the functional module and is set to correspond to the ventilation window on the side of the wide voltage overcurrent protection box (11).
4. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The height of the ventilation chamber (115) is greater than the height of the ventilation window. The inner and outer plates of the telescopic sliding frame (116) are sealed with equal height. The innermost plate of the telescopic sliding frame (116) has several cylindrical holes and slots that are semi-open to the connecting liquid channel (118). The two ends of the hydraulic telescopic pipe (117) are fixedly connected to the end wall of the cylindrical hole and slot and the port of the connecting liquid channel (118), respectively.
5. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The hydraulic telescopic tube (117) is a telescopic sleeve structure. Its outermost sleeve and innermost sleeve are elastically connected end to end by a built-in return spring (1172). The return spring (1172) is used to reset the extended hydraulic telescopic tube (117) after manual depressurization.
6. An overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1 or 5, characterized in that, The hydraulic telescopic pipe (117) is equipped with a pressure relief valve (1171). One end of the hydraulic telescopic pipe (117) connected to the telescopic slide frame (116) has an L-shaped immersion liquid channel (1161) extending from the inside of the hydraulic telescopic pipe (117) into the inside of the telescopic slide frame (116). The through end of the immersion liquid channel (1161) faces the connection between the internal functional module space and the ventilation window of the wide voltage overcurrent protection box (11).
7. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The telescopic sliding frame (116) has a card insertion protrusion on the side facing the ventilation window.
8. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The moving pipeline (122) has a stepped structure, and its opening position does not interfere with the assembly hole on the assembly baffle (121). The rod end of the piston rod (123) passes through the assembly baffle (121) radially along the moving pipeline (122).
9. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The power-off pad (125) is made of non-metallic material and is arranged around the periphery of the assembly hole. The surface of the assembly baffle (121) is also provided with several screw holes for assembly and fixing.
10. The overcurrent protection device for wide voltage-adaptive electronic equipment according to claim 1, characterized in that, The mounting base (111) is detachably connected to the wide voltage overcurrent protection box (11) by bolts, and the extension stroke of the hydraulic telescopic pipe (117) is adapted to the sliding stroke of the telescopic slide frame (116) in the ventilation chamber (115).