An electric energy metering box with automatic sealing compensation function

Abstract

The application relates to an electric energy metering box with an automatic sealing compensation function, and relates to the technical field of electrical equipment, which comprises a box body with a door frame, a box door hinged to the front side of the box body, and a multistage sealing compensation system integrated in the door frame; the multistage sealing compensation system comprises a sealing execution module and a power control module in linkage cooperation, the sealing execution module comprises a floating pressing plate, a sealing strip and a pressing plate guide pin, and is used for forming a sealing interface and transmitting sealing pressure; the power control module comprises a multistage stepped wedge-shaped slider, a self-locking stop surface, an energy storage driving element, a pressure sensing unit, a trigger limiting rod and a threshold adjusting screw, and is used for sensing sealing pressure changes and triggering automatic compensation and one-way self-locking. The application can compensate for sealing pressure attenuation caused by aging of the sealing strip in real time, effectively solves the problem of sealing failure of existing outdoor metering boxes, greatly improves the sealing reliability and maintenance-free period of the electric energy metering box, reduces operation and maintenance costs, and is suitable for outdoor harsh use environments.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to an energy metering box with automatic sealing compensation function. Background Technology

[0002] Electricity metering boxes are core infrastructure equipment in power distribution networks. They are widely installed in outdoor residential buildings, industrial parks, rural power grids, and other scenarios. Their sealing and protection performance directly affects the operational safety of internal metering equipment, the efficiency of power grid operation and maintenance, and the service life of the equipment.

[0003] Outdoor electricity metering boxes are exposed to the natural environment for extended periods. Over time, the rubber sealing strips used for sealing undergo material creep and permanent compression deformation, causing a continuous decrease in the sealing pressure between the strip and the box door. This leads to gaps at the sealing interface, ultimately causing the box's protection level to fail. External moisture, dust, and sand can then penetrate the box through these gaps, causing minor issues like corrosion of metering components and reduced metering accuracy, or more serious problems such as short circuits and electrical leaks, severely impacting the safe operation of the power grid.

[0004] In related technologies, the problem of sealing strip aging is addressed by applying a constant pre-pressure to the pressure plate using a fixed spring to passively compensate for the deformation of the sealing strip. However, this solution cannot adjust the compensation amount according to the actual changes in sealing pressure, and the spring is prone to fatigue failure due to long-term compression, making it impossible to achieve stable sealing throughout the entire life cycle. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, this application provides an energy metering box with automatic sealing compensation function.

[0006] An energy metering box with automatic sealing compensation function includes a box body with a door frame, a door hinged to the box body, and a multi-level sealing compensation system integrated in the door frame. The multi-level sealing compensation system includes a sealing execution module and a power control module. The sealing execution module cooperates with the door to form a sealing interface. The power control module is linked with the sealing execution module to sense changes in sealing pressure and trigger automatic compensation when the sealing pressure decays to a set threshold. At the same time, it completes one-way self-locking after compensation to achieve stable maintenance of sealing pressure. The sealing execution module includes a floating pressure plate, a sealing strip, and multiple sets of pressure plate guide pins. The floating pressure plate is installed inside the door frame, located between the sealing strip and the power control module. The floating pressure plate has a guide through hole, which slides with the pressure plate guide pin. The sealing strip is fixed to the side of the floating pressure plate facing the door and fits snugly against the door for sealing. The power control module includes a multi-stage stepped wedge slider, a self-locking stop, an energy storage drive element, a pressure sensing unit, a trigger limit rod, and a threshold adjustment screw. The multi-stage stepped wedge slider is installed in a track within the door frame and can move reciprocally in a straight line along the track. The self-locking stop is integrally formed with the wedge slider and cooperates with the trigger limit rod to form a one-way locking structure. The energy storage drive element is installed inside the door frame and abuts against the wedge slider, providing forward driving force for the wedge slider. The pressure sensing unit is installed between the floating pressure plate and the trigger limit rod to convert the sealing pressure into a displacement signal. The trigger limit rod is hinged to the door frame and cooperates with the pressure sensing unit and the self-locking stop to achieve locking and unlocking. The threshold adjustment screw is threaded to the door frame and abuts against the pressure sensing unit to adjust the trigger threshold.

[0007] By adopting the above technical solution, a purely mechanical, passive, automatic sealing pressure compensation closed-loop system was constructed. It requires no external power supply or electronic components and can detect the sealing pressure attenuation caused by the aging of the sealing strip in real time. It automatically completes the compensation action and unidirectional self-locking pressure maintenance, which solves the sealing failure problem caused by creep and permanent compression deformation of the sealing strip in existing outdoor power metering boxes. It greatly improves the outdoor protection reliability of the metering box, extends the service life of the equipment, reduces the manual operation and maintenance cost, and is perfectly adapted to the application scenario of outdoor metering boxes without power supply.

[0008] Optionally, the back of the floating pressure plate facing away from the door is divided into a first mating area and a second mating area; the first mating area slides in contact with the inclined surface of the wedge-shaped slider, and the second mating area abuts against the pressure sensing unit. The floating pressure plate can only reciprocate linearly along the axial direction of the pressure plate guide pin.

[0009] By adopting the above technical solution, the two cooperating areas realize the functional division of displacement transmission and pressure transmission respectively, with clear structural division of labor and clear linkage logic without interference; by limiting the floating pressure plate to a single direction of movement through the pressure plate guide pin, the problems of pressure plate deflection, wear, and jamming during the compensation process can be completely avoided, ensuring uniform transmission of sealing pressure and accurate output of compensation displacement, and improving the operational stability of the entire compensation system.

[0010] Optionally, the sealing strip is fitted and fixed in the fitting groove on the front of the floating pressure plate facing the door, with no relative displacement to the floating pressure plate; when the door is closed, the sealing strip is tightly fitted to the inner surface of the door, forming an airtight or watertight sealing barrier.

[0011] By adopting the above technical solutions, the embedded fixing method can ensure that the sealing strip and the floating pressure plate are firmly connected, avoiding the problem of sealing strip falling off or shifting during long-term use or multiple compensation operations, and ensuring the stability of the sealing interface; when the door is closed, the airtight and watertight barrier formed by the tight fit with the box door can effectively block external water vapor, dust and sand from entering the box, protecting the metering components inside the box from corrosion and damage, and greatly improving the protection level and operational safety of the power metering box.

[0012] Optionally, multiple sets of pressure plate guide pins are evenly arranged along the mounting groove of the door frame. The root of each pressure plate guide pin is fixedly connected to the door frame, and the rod passes through the guide hole of the floating pressure plate. The axial direction of the pressure plate guide pin is parallel to the normal direction of the door frame, providing guidance and constraint for the movement of the floating pressure plate.

[0013] By adopting the above technical solution, the evenly arranged pressure plate guide pins can balance the force on the entire circle of the floating pressure plate, avoiding uneven wear and jamming caused by uneven local force. The fixed connection at the root ensures that the guide pins are firmly installed, and the sliding fit with the guide through hole of the floating pressure plate can accurately constrain the movement direction of the floating pressure plate. At the same time, it can withstand the lateral force generated during the operation of the floating pressure plate, avoiding the lateral load from being transmitted to the wedge slider and causing jamming of the transmission structure, ensuring the stable operation of the transmission structure, and simplifying the overall assembly process, which is convenient for modular disassembly and assembly and subsequent maintenance.

[0014] Optionally, the extension direction of the slide is parallel to the sealing mating plane of the door frame facing the box door, and the inclined surface of the wedge slider faces the first mating area of ​​the floating pressure plate. When the wedge slider moves along the slide, the horizontal displacement is converted into the vertical extension displacement of the floating pressure plate along the normal direction of the door frame through the inclined surface.

[0015] By adopting the above technical solution, the limitation of the slide direction can ensure that the horizontal movement of the wedge slider and the vertical movement of the floating pressure plate do not interfere with each other, realizing accurate and lossless conversion of displacement direction; the inclined structure of the wedge slider can efficiently convert its own horizontal feed displacement into the vertical extension displacement of the floating pressure plate, accurately compensate for the creep or permanent deformation of the sealing strip, so that the sealing strip can quickly return to the set compression state, and the sealing pressure is restored accurately and efficiently, avoiding the problems of over-compensation or under-compensation.

[0016] Optionally, a self-locking stop is provided at the end of each inclined step, perpendicular to the extension direction of the slide; the trigger limit rod engages with the self-locking stop through the locking arm, restricting the backward movement of the wedge slider and achieving self-locking pressure holding.

[0017] By adopting the above technical solution, the self-locking stop at the end of each inclined step can achieve graded locking after multi-level compensation, accurately adapting to different degrees of aging deformation of the sealing strip, and realizing graded compensation throughout the entire life cycle; the contact engagement between the trigger limit rod and the self-locking stop forms a reliable one-way locking structure, which can effectively limit the backward movement of the wedge slider, avoid the decrease in sealing pressure caused by the backward movement of the compensation displacement, and achieve self-locking pressure maintenance after compensation. Even if the energy storage drive element fails, the completed compensation amount remains stable and effective, greatly improving the failure safety of the system.

[0018] Optionally, the energy storage drive element is installed in a spring seat inside the door frame, and the spring seat is fixedly connected to the door frame; one end of the energy storage drive element abuts against the inner wall of the spring seat, and the other end abuts against the tail end face of the wedge slider, continuously providing a constant driving force to the wedge slider in the direction of slide rail movement.

[0019] By adopting the above technical solution, the spring seat provides a stable installation and limiting foundation for the energy storage drive element, ensuring that it is firmly installed and evenly stressed, and avoiding deviation during operation; the constant forward driving force can ensure the stability of the driving force of each feeding compensation action of the wedge slider, ensuring that the compensation amount of each stage is consistent and the sealing pressure is accurately restored; at the same time, no external energy input is required, realizing pure mechanical passive drive, which is perfectly adapted to the outdoor metering box scenario without power supply, and can still output driving force stably in extreme and harsh environments.

[0020] Optionally, the pressure sensing unit includes a sensing spring and a support spring; one end of the sensing spring is fixedly connected to the second mating area of ​​the floating pressure plate, and the other end is fixedly connected to the force arm of the trigger limit rod; one end of the support spring abuts against the side of the force arm of the trigger limit rod away from the sensing spring, and the other end abuts against the threshold adjustment screw; the pressure sensing unit is used to convert the sealing pressure into a compression displacement signal and feed it back to the trigger limit rod.

[0021] By adopting the above technical solution, the pressure sensing unit composed of dual springs achieves accurate sensing of sealing pressure and conversion of displacement signals. The sensing spring can transmit the pressure changes of the floating pressure plate in real time, and the support spring, together with the threshold adjustment screw, can achieve precise adjustment of the trigger threshold. The dual springs working together form a redundant design, which greatly improves the reliability of pressure sensing, avoids system failure caused by the failure of a single spring, and can accurately reflect the attenuation of sealing pressure, providing a precise signal for triggering the unlocking action of the limit rod, ensuring that the compensation action is triggered in a timely and accurate manner.

[0022] Optionally, the trigger limit rod is hinged to the mounting base on the door frame via a pivot, and the mounting base is fixedly connected to the door frame; the trigger limit rod rotates around the pivot under the compressive force of the pressure sensing unit, causing the locking arm to engage or disengage from the self-locking stop surface; the threaded end of the threshold adjusting screw extends into the mounting groove and abuts against the support spring, and rotating the threshold adjusting screw can adjust the initial pre-compression of the pressure sensing unit, thereby adjusting the trigger threshold.

[0023] By adopting the above technical solution, the cooperation between the mounting base and the rotating shaft ensures that the trigger limit rod is firmly hinged and can rotate flexibly around the rotating shaft, realizing a smooth switching between locking and unlocking actions. The rotation of the trigger limit rod driven by the pressure sensing unit realizes a fully automated closed-loop action of "pressure attenuation-unlocking compensation-pressure recovery-relocking", without manual intervention. The threshold adjustment screw can precisely adjust the initial pre-compression of the pressure sensing unit, thereby adapting to the trigger threshold requirements of different sealing strip materials and different usage scenarios. At the same time, it can compensate for the manufacturing tolerance of parts and ensure the performance consistency of mass-produced products.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. It achieves a fully closed-loop pure mechanical control of "sealing pressure sensing - threshold judgment - automatic compensation - self-locking pressure holding", without the need for external power supply and electronic components. It is fully compatible with outdoor passive metering box scenarios and can still operate stably in harsh environments such as high temperature, high humidity and strong electromagnetic interference. Its reliability far exceeds that of existing electric compensation solutions. 2. By cooperating with the multi-stage stepped wedge slider and the self-locking stop surface, the graded and precise output of the compensation displacement and the one-way self-locking are realized. Even if the energy storage drive element fails, the completed compensation amount remains stable and effective, realizing the failure safety design and greatly improving the long-term stability of the sealing system. 3. The pressure sensing unit composed of dual springs enables precise sensing of sealing pressure and flexible adjustment of trigger threshold, which can be adapted to the needs of different sealing strip materials and different application scenarios. At the same time, it compensates for the manufacturing tolerance of parts and ensures the performance consistency of mass-produced products. 4. The overall structure is integrated inside the door frame, without the need to modify the main structure of the box and door, making it easy to upgrade and modify existing electricity metering box products. It has strong versatility and low production and modification costs. 5. It significantly extends the service life and maintenance cycle of the sealing strip, reduces the maintenance cost of manually replacing the sealing strip, and effectively avoids damage to metering equipment and safety accidents caused by sealing failure, thereby improving the operational safety and service life of outdoor power metering boxes. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a structural diagram of the present application, mainly showing the door frame and the box door; Figure 3 This is a structural schematic diagram of the present application, mainly showing the mounting groove; Figure 4 yes Figure 3 A magnified view of part A in the middle; Figure 5This is a structural diagram of the present application, mainly showing the power control module; Figure 6 This is a structural diagram of the present application, mainly showing the trigger limit rod.

[0026] Figure descriptions: 1. Door frame; 2. Box body; 3. Box door; 4. Floating pressure plate; 5. Sealing strip; 6. Pressure plate guide pin; 7. Wedge slider; 8. Self-locking stop surface; 9. Energy storage drive element; 10. Pressure sensing unit; 101. Sensing spring; 102. Support spring; 11. Trigger limit rod; 12. Threshold adjustment screw; 13. Slide rail; 14. Mounting groove; 15. Spring seat; 16. Mounting base. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0028] An energy metering box with automatic sealing compensation function, reference Figure 1 It includes a housing 2 with a door frame 1, a door 3 hinged to the housing 2, and a multi-stage sealing compensation system integrated within the door frame 1. The multi-stage sealing compensation system consists of a sealing execution module and a power control module. The sealing execution module and the door 3 cooperate to form a sealing interface, and the power control module and the sealing execution module work together to achieve automatic compensation and locking of the sealing pressure.

[0029] refer to Figure 1 , Figure 2 , Figure 3 The opening edge of the housing 2 is provided with a closed-loop door frame 1, and a closed-loop mounting groove 14 is provided on the side of the door 1 facing the door 3. The mounting groove 14 provides the installation and limiting basis for the multi-stage sealing compensation system. The door 3 is rotatably connected to the housing 2 through a hinge. When the door is closed, the inner surface of the door 3 is tightly fitted with the sealing execution module, providing a stable reverse support force for the sealing structure.

[0030] The sealing execution module includes a floating pressure plate 4, a sealing strip 5, and multiple sets of pressure plate guide pins 6. The sealing execution module is used to form a stable sealing interface and transmit the sealing pressure to the power control module in real time. It also serves as the execution end for compensating for displacement.

[0031] refer to Figure 2 , Figure 3 , Figure 4 The floating pressure plate 4 is a plate-shaped structure, installed in the mounting groove 14 of the door frame 1, located between the sealing strip 5 and the power control module. Multiple sets of guide holes adapted to the pressure plate guide pin 6 are formed on the plate body of the floating pressure plate 4, creating a sliding fit with the pressure plate guide pin 6 through the guide holes. A sealing strip 5 fitting groove is provided on the front of the floating pressure plate 4 facing the door 3 for fixing the sealing strip 5.

[0032] The floating pressure plate 4 is divided into two mating areas on the back of the box door 3. The first mating area forms a sliding contact with the wedge slider 7 of the power control module, and the second mating area is mated with the pressure sensing unit 10 of the power control module to receive and transmit sealing pressure.

[0033] The floating pressure plate 4 can only reciprocate linearly along the axial direction of the pressure plate guide pin 6. Through the constraint of the pressure plate guide pin 6, deflection, wear and jamming during the movement are avoided, ensuring uniform transmission of sealing pressure and accurate output of compensation displacement.

[0034] The sealing strip 5 is fitted and fixed in the fitting groove on the front of the floating pressure plate 4, and there is no relative displacement between it and the floating pressure plate 4. When the door is closed, the exposed surface of the sealing strip 5 is tightly fitted with the inner surface of the door 3, and after being compressed, it forms an airtight and watertight sealing barrier, preventing external moisture and dust from entering the interior of the box 2.

[0035] The sealing strip 5 is the pressure signal input source for the entire compensation system. Changes in its compression state directly correspond to changes in sealing pressure. The attenuation of sealing pressure caused by creep and permanent compression deformation of the sealing strip 5 will be transmitted to the power control module in real time through the floating pressure plate 4, serving as the trigger for automatic compensation actions.

[0036] Multiple sets of pressure plate guide pins 6 are evenly arranged along the mounting groove 14 of the door frame 1. The root of each pressure plate guide pin 6 is fixedly connected to the bottom of the mounting groove 14 of the door frame 1, and the rod passes through the guide through hole of the floating pressure plate 4, forming a sliding fit with the floating pressure plate 4. The axial direction of the pressure plate guide pin 6 is parallel to the normal direction of the door frame 1, providing precise guiding constraints for the movement of the floating pressure plate 4.

[0037] The pressure plate guide pin 6 simultaneously bears the lateral force generated during the operation of the floating pressure plate 4, preventing the lateral load from being transmitted to the wedge slider 7 of the power control module, ensuring the operational stability of the transmission structure, and simplifying the assembly process of the overall structure, making it easy to modularly disassemble and maintain.

[0038] refer to Figure 4 , Figure 5 , Figure 6 The power control module includes a multi-stage stepped wedge-shaped slider 7, a self-locking stop surface 8 integrally formed on the wedge-shaped slider 7, an energy storage drive element 9, a pressure sensing unit 10, a trigger limit rod 11, and a threshold adjustment screw 12. The power control module is used to sense changes in sealing pressure in real time. When the sealing pressure decays to a set threshold, it automatically triggers a compensation action, outputs a compensation driving force, and completes unidirectional self-locking to ensure the stability of the compensated sealing pressure.

[0039] A multi-stage stepped wedge-shaped slider 7 is installed in the slide rail 13 at the bottom of the mounting groove 14 of the door frame 1. The extension direction of the slide rail 13 is parallel to the plane of the door frame 1, and the wedge-shaped slider 7 can reciprocate linearly along the slide rail 13. The side of the wedge-shaped slider 7 facing the floating pressure plate 4 is provided with a multi-stage continuous inclined step. The end of each inclined step is provided with a self-locking stop surface 8 perpendicular to the extension direction of the slide rail 13. The self-locking stop surface 8 and the wedge-shaped slider 7 are integrally formed.

[0040] The inclined surface of the wedge-shaped slider 7 forms a sliding fit with the first mating area on the back of the floating pressure plate 4. When the wedge-shaped slider 7 moves forward along the slide rail 13, the inclined surface converts the horizontal linear displacement into the vertical extension displacement of the floating pressure plate 4 along the normal direction, thereby compensating for the sealing compression. The self-locking stop surface 8 cooperates with the trigger limit rod 11 to form a one-way locking structure, restricting the backward movement of the wedge-shaped slider 7 and ensuring that the compensated displacement does not revert, thus achieving self-locking pressure maintenance.

[0041] The energy storage drive element 9 is installed in the spring seat 15 in the mounting groove 14 of the door frame 1, and the spring seat 15 is fixedly connected to the door frame 1. One end of the energy storage drive element 9 abuts against the inner wall of the spring seat 15, and the other end abuts against the tail end face of the wedge slider 7, always providing a constant driving force to the wedge slider 7 in the forward direction of the slide rail 13.

[0042] The energy storage drive element 9 is the power source of the entire compensation system. It completes pre-compression energy storage during initial assembly and does not require external energy input. When the limit rod 11 is triggered to release the wedge slider 7, it can push the wedge slider 7 to complete the feed compensation action. Its constant output force ensures the stability of the driving force of each compensation action and avoids over-compensation or under-compensation.

[0043] The pressure sensing unit 10 consists of a sensing spring 101 and a support spring 102. The sensing spring 101 is installed between the floating pressure plate 4 and the trigger limit rod 11. One end of the sensing spring 101 is fixedly connected to the second mating area on the back of the floating pressure plate 4, and the other end is fixedly connected to the force arm of the trigger limit rod 11. One end of the support spring 102 abuts against the side of the force arm of the trigger limit rod 11 away from the sensing spring 101, and the other end abuts against the threshold adjustment screw 12. The pressure sensing unit 10 is a pressure-displacement conversion element that converts the sealing pressure transmitted by the floating pressure plate 4 into a corresponding compression displacement, providing real-time feedback on the current sealing pressure status.

[0044] When the door is closed, the sealing pressure compresses the sensing spring 101 through the floating pressure plate 4, causing the sensing spring 101 and the support spring 102 to be in a compressed and energy-storing state. When the sealing strip 5 ages, causing the sealing pressure to decrease, the reverse force on the floating pressure plate 4 decreases, and the pressure output by the sensing spring 101 to the support spring 102 decreases. The support spring 102 gradually rebounds, and its rebound displacement directly corresponds to the amount of sealing pressure reduction. When it rebounds to the set threshold, it drives the trigger limit rod 11 to complete the unlocking action.

[0045] The trigger limit rod 11 is hinged to the mounting base 16 of the door frame 1 via a pivot, and the mounting base 16 is fixedly connected to the door frame 1. The trigger limit rod 11 is divided into a force-bearing arm and a locking arm. The force-bearing arm and the locking wall are rotatably connected by a connecting rod. The end of the force-bearing arm abuts against the end of the pressure sensing unit 10, and the end of the locking arm abuts against the self-locking stop surface 8 on the wedge slider 7.

[0046] Under normal conditions, the compressive force of the pressure sensing unit 10 pushes the trigger limit rod 11 to rotate around the axis, causing the locking arm to engage in the self-locking stop surface 8 of the wedge slider 7, restricting the forward movement of the wedge slider 7 and forming a locked state. When the sealing pressure decreases to a set threshold and the pressure sensing unit 10 rebounds to the critical position, the trigger limit rod 11 rotates in the opposite direction around the axis under the combined action of the support spring 102 and the sensing spring 101, causing the locking arm to disengage from the self-locking stop surface 8, releasing the lock on the wedge slider 7, and releasing the wedge slider 7 to complete the feed compensation. After the wedge slider 7 completes the first stage of feed, the sealing pressure recovers, the pressure sensing unit 10 is compressed again, pushing the trigger limit rod 11 to rotate again, causing the locking arm to engage in the next stage of self-locking stop surface 8, restoring the locked state, and completing one compensation loop.

[0047] The threshold adjustment screw 12 is threaded to the side wall of the door frame 1, with its threaded end extending into the mounting groove 14 and abutting against the support spring 102 of the pressure sensing unit 10, causing the support spring 102 to extend into the groove at the threaded end of the threshold adjustment screw 12. By rotating the threshold adjustment screw 12, the initial pre-compression of the pressure sensing unit 10 can be adjusted, thereby adjusting the sealing pressure threshold for unlocking the trigger limit rod 11, adapting to different usage scenarios and the material properties of the sealing strip 5.

[0048] The implementation principle of this application embodiment is as follows: First, after the door is closed, the door 3 squeezes the sealing strip 5, and the sealing strip 5 transmits the pressure to the floating pressure plate 4. The floating pressure plate 4 moves slightly backward along the pressure plate guide pin 6, compressing the pressure sensing unit 10. The compression force of the pressure sensing unit 10 pushes the locking arm of the trigger limit rod 11 to embed into the self-locking stop surface 8 of the wedge slider 7, locking the wedge slider 7. At this time, the sealing strip 5 is in the set compression state, establishing a stable sealing protection.

[0049] With prolonged use, the sealing strip 5 undergoes creep or permanent compression deformation, the sealing pressure gradually decreases, the reverse force on the floating pressure plate 4 decreases, the pressure sensing unit 10 gradually rebounds, and drives the trigger limit rod 11 to gradually rotate towards the unlock position.

[0050] When the sealing pressure decreases to the set threshold, the pressure sensing unit 10 rebounds to the critical position, triggering the locking arm of the limit rod 11 to disengage from the self-locking stop surface 8, releasing the lock on the wedge slider 7. The energy storage drive element 9 pushes the wedge slider 7 forward one step along the slide 13. The inclined surface of the wedge slider 7 pushes the floating pressure plate 4 to extend outward along the normal direction, compensating for the deformation of the sealing strip 5, so that the sealing strip 5 is recompressed and the sealing pressure returns to the set range.

[0051] After the sealing pressure is restored, the floating pressure plate 4 compresses the pressure sensing unit 10 again, pushing the locking arm of the trigger limit rod 11 to embed into the next level self-locking stop surface 8 of the wedge slider 7, relocking the wedge slider 7, completing one automatic compensation, and the system returns to a stable state.

[0052] As the sealing strip 5 continues to age, the above compensation process is triggered cyclically until all the steps of the wedge slider 7 are exhausted, thus completing the automatic compensation of sealing pressure throughout the entire life cycle.

[0053] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy metering box with automatic sealing compensation function, characterized in that, The system includes a housing (2) with a door frame (1), a door (3) hinged to the housing (2), and a multi-level sealing compensation system integrated within the door frame (1). The multi-level sealing compensation system includes a sealing execution module and a power control module. The sealing execution module cooperates with the door (3) to form a sealing interface. The power control module is linked with the sealing execution module to sense changes in sealing pressure and trigger automatic compensation when the sealing pressure decays to a set threshold. At the same time, it completes one-way self-locking after compensation to achieve stable maintenance of sealing pressure. The sealing execution module includes a floating pressure plate (4), a sealing strip (5), and multiple sets of pressure plate guide pins (6); the floating pressure plate (4) is installed inside the door frame (1) and located between the sealing strip (5) and the power control module. The floating pressure plate (4) has a guide through hole and slides with the pressure plate guide pin (6); the sealing strip (5) is fixed to the side of the floating pressure plate (4) facing the box door (3) and fits and seals against the box door (3); The power control module includes a multi-stage stepped wedge slider (7), a self-locking stop surface (8), an energy storage drive element (9), a pressure sensing unit (10), a trigger limit rod (11), and a threshold adjustment screw (12). The multi-stage stepped wedge slider (7) is installed in the slide rail (13) inside the door frame (1) and can reciprocate linearly along the slide rail (13). The self-locking stop surface (8) is integrally formed with the wedge slider (7) and cooperates with the trigger limit rod (11) to form a one-way locking structure. The energy storage drive element (9) is installed inside the door frame (1). The pressure sensing unit (10) abuts against the wedge-shaped slider (7) to provide forward driving force for the wedge-shaped slider (7); the pressure sensing unit (10) is installed between the floating pressure plate (4) and the trigger limit rod (11) to convert the sealing pressure into a displacement signal; the trigger limit rod (11) is hinged to the door frame (1) and cooperates with the pressure sensing unit (10) and the self-locking stop (8) to realize locking and unlocking; the threshold adjustment screw (12) is threaded to the door frame (1) and abuts against the pressure sensing unit (10) to adjust the trigger threshold; The floating pressure plate (4) is divided into a first mating area and a second mating area on the back of the box door (3); the first mating area slides in contact with the inclined surface of the wedge slider (7), and the second mating area abuts against the pressure sensing unit (10); the floating pressure plate (4) can only reciprocate linearly along the axial direction of the pressure plate guide pin (6). The extension direction of the slide (13) is parallel to the sealing mating plane of the door frame (1) towards the box door (3). The inclined surface of the wedge slider (7) faces the first mating area of ​​the floating pressure plate (4). When the wedge slider (7) moves along the slide (13), the horizontal displacement is converted into the vertical extension displacement of the floating pressure plate (4) along the normal direction of the door frame (1) through the inclined surface. The self-locking stop surface (8) is located at the end of each step and is perpendicular to the extension direction of the slide rail (13); the trigger limit rod (11) abuts against the self-locking stop surface (8) through the locking arm, restricting the backward movement of the wedge slider (7) and realizing self-locking pressure holding; The pressure sensing unit (10) includes a sensing spring (101) and a support spring (102); one end of the sensing spring (101) is fixedly connected to the second mating area of ​​the floating pressure plate (4), and the other end is fixedly connected to the force arm of the trigger limit rod (11); one end of the support spring (102) abuts against the side of the force arm of the trigger limit rod (11) away from the sensing spring (101), and the other end abuts against the threshold adjustment screw (12); The trigger limit rod (11) is hinged to the mounting base (16) of the door frame (1) via a rotating shaft. The mounting base (16) is fixedly connected to the door frame (1). The trigger limit rod (11) rotates around the rotating shaft under the compression force of the pressure sensing unit (10), causing the locking arm to be embedded in or disengaged from the self-locking stop surface (8).

2. The energy metering box with automatic sealing compensation function according to claim 1, characterized in that, The sealing strip (5) is fitted and fixed in the fitting groove of the floating pressure plate (4) facing the front of the box door (3), and there is no relative displacement between it and the floating pressure plate (4); when the door is closed, the sealing strip (5) is tightly fitted to the inner surface of the box door (3) to form an airtight or watertight sealing barrier.

3. The energy metering box with automatic sealing compensation function according to claim 1, characterized in that, Multiple sets of pressure plate guide pins (6) are evenly arranged along the mounting groove (14) of the door frame (1). The root of each pressure plate guide pin (6) is fixedly connected to the door frame (1), and the rod passes through the guide through hole of the floating pressure plate (4). The axial direction of the pressure plate guide pin (6) is parallel to the normal direction of the door frame (1), providing guidance and constraint for the movement of the floating pressure plate (4).

4. The energy metering box with automatic sealing compensation function according to claim 1, characterized in that, The energy storage drive element (9) is installed in the spring seat (15) inside the door frame (1), and the spring seat (15) is fixedly connected to the door frame (1); one end of the energy storage drive element (9) abuts against the inner wall of the spring seat (15), and the other end abuts against the tail end face of the wedge slider (7), continuously providing the wedge slider (7) with a constant driving force along the sliding track (13) in the forward direction.

5. The energy metering box with automatic sealing compensation function according to claim 1, characterized in that, The pressure sensing unit (10) is used to convert the sealing pressure into a compression displacement signal and feed it back to the trigger limit rod (11).

6. The energy metering box with automatic sealing compensation function according to claim 3, characterized in that, The threaded end of the threshold adjustment screw (12) extends into the mounting groove (14) and abuts against the support spring (102). Rotating the threshold adjustment screw (12) can adjust the initial pre-compression of the pressure sensing unit (10) and thus adjust the trigger threshold.

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