Highly sealed electric meter box

Abstract

The utility model discloses a kind of high sealing property electric meter box, including box and door, box is provided with container groove, door is movably arranged on box, lock body structure is arranged between door and box, the circumferential direction of the inner wall of container groove is provided with baffle, baffle is close to the opening of container groove and is provided with the circumferential direction of sealing edge on baffle, sealing edge inner wall, baffle top wall and the inner wall of container groove opening are combined to form sealing groove, the circumferential direction of the inner wall of door is provided with plug for being placed into sealing groove when door cover is set on box, the clearance cooperation of the outer peripheral wall of plug and the inner wall of container groove opening forms sealing gap, sealing element is arranged in sealing gap, pre-tightening piece for being linked with sealing element to apply pre-tightening force to sealing element to make sealing element and plug seal cooperation is provided on box.The utility model solves the problem that the sealing strength between the door of traditional electric meter box and box is low, which leads to the invasion of dust, liquid and other impurities from outside into the box, causing erosion of electronic components.

Description

Technical Field

[0001] This utility model relates to the field of meter box technology, specifically a highly sealed meter box. Background Technology

[0002] In the daily operation and management of power systems, meter boxes, as key equipment for installing and protecting electronic components such as meters, transformers, and terminals, are widely used in various scenarios including residential communities, commercial complexes, industrial parks, and outdoor public power facilities. Their core function is not only to provide a stable mounting platform for electronic components, but more importantly, to isolate them from various impurities in the external environment, ensuring that the internal electronic components can operate stably and safely for extended periods, thereby guaranteeing the accuracy of power metering and the reliability of power supply. However, the traditional meter boxes commonly found on the market generally have significant flaws in their sealing structure design, making them unsuitable for use in complex environments. Traditional meter boxes typically rely on simple snap-fit ​​connections or a single rubber sealing strip for sealing between the door and the box body, with a locking mechanism used to lock the door and body in place. This sealing method is rudimentary, with limited sealing contact area and a lack of effective pre-tightening and compensation mechanisms. In practical applications, as meter boxes are exposed to outdoor or complex indoor environments for extended periods, they are affected by temperature changes leading to material expansion and contraction, wear and tear from long-term use, and external vibrations and impacts. Consequently, the sealing gap between the door and the box body gradually increases, making the original sealing structure prone to failure. When the sealing structure fails, impurities such as dust, moisture, rainwater, and corrosive gases from the external environment can enter the meter box through the gaps between the door and the box body. This intrusion can seriously damage the internal electronic components: firstly, dust accumulation on the surface of electronic components affects their heat dissipation, leading to performance degradation and shortened lifespan due to overheating, and in severe cases, even short circuits; secondly, moisture, rainwater, and corrosive gases corrode the metal pins and circuit boards of electronic components, damaging their electrical performance, causing inaccurate meter readings, abnormal transformer operation, and even circuit failures throughout the meter box. This not only disrupts the power company's metering management but can also affect users' normal electricity consumption, resulting in unnecessary economic losses. Furthermore, in some application scenarios with more stringent environmental requirements, such as damp basements, dusty construction sites, and outdoor environments in coastal areas, the sealing defects of traditional meter boxes are more prominent, and the failure rate of their internal electronic components is significantly higher than in ordinary environments. This not only increases the maintenance cost and workload of power facilities, but also reduces the stability and reliability of power system operation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a highly airtight meter box, which solves the problem that the low sealing strength between the door and the body of traditional meter boxes allows external dust or liquids to easily penetrate the box and corrode electronic components.

[0004] To achieve the above objectives, this utility model provides a highly airtight meter box, including a box body and a box door. The box body has a receiving groove for installing and accommodating external electronic components. The box door is movably mounted on the box body to close or expose the receiving groove. A locking structure for locking the box door is provided between the box door and the box body. A retaining edge is circumferentially provided on the inner peripheral wall of the receiving groove. The retaining edge is located near the opening of the receiving groove and a sealing edge is circumferentially provided on the retaining edge. The sealing edge is perpendicular to the retaining edge. The inner wall of the sealing edge, the top wall of the retaining edge, and the inner wall of the receiving groove opening combine to form a sealing groove. A plug is circumferentially provided on the inner wall of the box door for inserting into the sealing groove when the box door is placed on the box body. The outer peripheral wall of the plug and the inner wall of the receiving groove opening are clearance-fitted to form a sealing gap. A sealing element for filling the sealing gap is provided in the sealing gap. A pre-tightening element is provided on the box body for linkage with the sealing element to apply a pre-tightening force to the sealing element to seal the sealing element with the plug.

[0005] The advantages of adopting the above technical solution are as follows: the central slot can stably install and accommodate external electronic components, providing a reliable installation space for them. The movable door design allows for flexible closing or exposure of the slot, meeting the daily opening and closing requirements of the meter box. The lock structure can lock the door, preventing accidental opening and exposure of internal components. The arrangement of the baffle near the slot opening and perpendicular to the sealing edge ensures that the combined sealing groove provides precise insertion space for the plug. When the door is closed, the plug is placed into the sealing groove, initially blocking the intrusion path of external impurities. The sealing element in the sealing gap fills the gap, further enhancing the sealing effect. Furthermore, the pre-tightening element and the sealing element work together to apply pre-tightening force to the sealing element, ensuring a tight seal between the sealing element and the plug. This effectively solves the problem of low sealing strength between the traditional meter box door and the box body, preventing external dust, liquids, and other impurities from entering the box, ensuring stable operation of internal electronic components, and maintaining the reliability of power metering and supply.

[0006] The present invention further comprises: the sealing element includes a plurality of sealing gaskets, which are evenly distributed in the sealing groove; the inner peripheral wall surface of the sealing gasket is a contact surface for abutting against the outer peripheral wall of the insert when the insert is placed into the sealing groove; and the sealing gasket is made of elastic rubber material.

[0007] The advantages of adopting the above technical solution are as follows: The sealing element uses a sealing gasket, and the circumferential arrangement of several sealing gaskets ensures that the sealing gaskets fully correspond to the outer peripheral wall of the plug, ensuring complete sealing coverage and avoiding partial sealing gaps. Furthermore, the contact surface of the inner peripheral wall of the sealing gasket can tightly abut against the outer peripheral wall of the plug when the plug is inserted into the sealing groove, forming an effective sealing contact and blocking the path of impurities intruding through the sealing gap. The sealing gasket is made of elastic rubber, possessing excellent elastic deformation capability, which can adapt to minor dimensional deviations between the plug and the sealing groove. Simultaneously, it can generate rebound force when compressed, maintaining long-term sealing pressure and preventing loosening of the seal due to long-term use. Compared to traditional rigid sealing structures, the elastic rubber sealing gasket is better able to cope with the effects of temperature changes and slight vibrations, reducing the risk of seal failure and ensuring that the electronic components inside the meter box are in a stable sealed environment, maintaining the normal operating performance of the components.

[0008] This utility model further comprises: the sealing gasket is composed of a front gasket and a rear gasket stacked together; the outer peripheral wall of the front gasket and the inner peripheral wall of the rear gasket are tightly fitted together; a plurality of force-bearing protrusions are evenly distributed along the circumference of the front gasket on the outer peripheral wall; the outer surface of the force-bearing protrusions is connected to the outer peripheral wall of the front gasket in a smooth arc; adjacent force-bearing protrusions combine to form a first groove; a plurality of extrusion protrusions are evenly distributed along the circumference of the rear gasket on the inner peripheral wall; the outer surface of the extrusion protrusions is connected to the inner peripheral wall of the rear gasket in a smooth arc; adjacent extrusion protrusions combine to form a second groove; a plurality of force-bearing protrusions correspond one-to-one with a plurality of second grooves and are interlocked; a plurality of extrusion protrusions correspond one-to-one with a plurality of first grooves and are interlocked; a plurality of force-bearing protrusions are arranged in a wavy shape; a plurality of extrusion protrusions are arranged in a wavy shape; the force-bearing protrusions are integrally formed with the front gasket; and the extrusion protrusions are integrally formed with the rear gasket.

[0009] The advantages of adopting the above technical solution are: the sealing gasket is composed of a front gasket and a rear gasket, which are fitted together to ensure a stable connection, avoid relative displacement during use, and ensure the integrity of the sealing structure. Furthermore, the stress-bearing protrusion of the front gasket interlocks with the second slot of the rear gasket, while the compression protrusion of the rear gasket interlocks with the first slot of the front gasket. This interlocking structure enhances the linkage between the two gaskets, preventing individual deformation from affecting the sealing effect. Simultaneously, both the stress-bearing and compression protrusions are wavy, and their outer surfaces connect smoothly with the corresponding retaining ring wall surface. This wavy structure increases the overall integrity of the sealing gasket. The elastic deformation space enhances sealing adaptability, and the smooth arc surface reduces stress concentration, avoiding structural damage caused by long-term deformation. At the same time, it can transmit force when subjected to external stress to ensure that the inner peripheral wall of the front gasket is always tightly fitted with the outer peripheral wall of the insert, thereby improving sealing strength. In the above technology, the force-bearing protrusion is integrally formed with the front gasket, while the extrusion protrusion is integrally formed with the rear gasket. The above settings enhance the connection strength between the protrusion and the retaining ring, prevent the protrusion from falling off, enhance the overall structural stability of the sealing gasket, extend the service life of the sealing element, and ensure reliable long-term sealing performance.

[0010] This utility model further includes: a plurality of pre-tightening holes evenly distributed circumferentially on the outer peripheral wall of the housing; the plurality of pre-tightening holes are located near the sealing groove and are all connected to the sealing groove; the pre-tightening component includes a plurality of pre-tightening bolts; the plurality of pre-tightening bolts correspond one-to-one with the plurality of pre-tightening holes and are threadedly connected; the pre-tightening bolt consists of a screw end and a nut end; each rear gasket has an embedded bone plate made of metal; each screw end is rotatably connected to its adjacent bone plate; the nut end is located on the outer peripheral of the housing and extends with an operating handle for external operators to grip.

[0011] The advantages of adopting the above technical solution are: the pre-tightening hole on the outer peripheral wall of the box is close to and connected to the sealing groove, which allows the force of the pre-tightening component to be accurately transmitted to the sealing component, ensuring that the pre-tightening force is effectively applied to the sealing part and avoiding force loss. The pre-tightening component uses a pre-tightening bolt connected to the threaded pre-tightening hole. This threaded connection structure allows for precise adjustment of the pre-tightening force, facilitating adjustment of tightness according to sealing requirements. The screw end of the pre-tightening bolt is rotatably connected to the metal support plate embedded in the rear gasket. The metal support plate enhances the load-bearing capacity of the rear gasket, preventing deformation during pre-tightening and ensuring stable transmission of the pre-tightening force to the sealing gasket. The nut end is located on the outer periphery of the box and extends with an operating handle. The operating handle is convenient for external operators to grip, simplifying the pre-tightening operation process without the need for complex tools, improving operational convenience. Simultaneously, the external placement of the nut end does not affect the internal space of the box, avoiding interference with the installation of electronic components and ensuring the overall performance of the meter box.

[0012] The present invention further includes a gasket between the bottom wall of the nut end and the outer peripheral wall of the housing, the gasket having a through hole for the screw end to pass through, and the gasket being made of elastic rubber material.

[0013] The advantages of adopting the above technical solution are: the gasket between the bottom wall of the nut end and the outer peripheral wall of the box can fill the gap between the two, preventing external impurities from entering the box through the fit gap between the pre-tightening bolt and the pre-tightening hole, supplementing the weak sealing points of the pre-tightening structure, and improving the overall sealing performance of the meter box. The gasket is made of elastic rubber material, which has good elastic deformation ability and can adapt to the small dimensional deviation between the nut end and the outer peripheral wall of the box. At the same time, it can generate a rebound force when the pre-tightening bolt is tightened, maintaining the tight fit between the gasket and the nut end and the outer peripheral wall of the box, preventing the seal from loosening due to vibration and temperature changes after long-term use, ensuring the long-term reliable sealing of the pre-tightening part, further protecting the electronic components inside the box from external impurities and maintaining the stable working state of the components. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a three-dimensional view of the box door in the open state of this utility model; Figure 3 This is a three-dimensional view of the fit between the retaining edge and the sealing edge in this utility model; Figure 4 This is a three-dimensional view of the mating state of the sealing gasket and the preload bolt in this utility model; Figure 5 This is a three-dimensional view of the flange and its linkage structure in the present invention, in conjunction with the sealing element and the pre-tightening element. Figure 6 This is a partial three-dimensional schematic diagram of the sealing gasket in this utility model; Figure 7 for Figure 6 A schematic diagram of the separation state. Detailed Implementation

[0015] This utility model provides a highly airtight meter box, including a box body 1 and a box door 2. The box body 1 has a receiving groove 11 for installing and accommodating external electronic components. The box door 2 is movably disposed on the box body 1 to close or expose the receiving groove 11. A locking structure for locking the box door 2 is provided between the box door 2 and the box body 1. A retaining edge 12 is circumferentially disposed on the inner peripheral wall of the receiving groove 11. The retaining edge 12 is disposed near the opening of the receiving groove 11 and a sealing edge 13 is circumferentially disposed on the retaining edge 12. The sealing edge 13 is perpendicular to the retaining edge 12. The inner wall of the sealing edge 13, the top wall of the retaining edge 12, and the inner wall of the opening of the receiving groove 11 combine to form a sealing groove 131. A circumferentially disposed inner wall of the box door 2 is used for positioning when the box door 2 is closed on the box body 1. The insert 21 is inserted into the sealing groove 131. The outer peripheral wall of the insert 21 is fitted with the inner wall of the opening of the groove 11 to form a sealing gap. A sealing element is provided in the sealing gap to fill the sealing gap. The housing 1 is provided with a pre-tightening element for linkage with the sealing element to apply a pre-tightening force to the sealing element so that the sealing element and the insert 21 are sealed together. The sealing element includes a plurality of sealing gaskets 3, which are evenly distributed in the sealing groove 131. The inner peripheral wall of the sealing gasket 3 is an abutting surface for abutting against the outer peripheral wall of the insert 21 when the insert 21 is inserted into the sealing groove 131. The sealing gasket 3 is made of elastic rubber material and is composed of a front gasket 31 and a rear gasket 32 ​​stacked together. The outer peripheral wall of the front gasket 31 and the inner peripheral wall of the rear gasket 32 ​​are tightened together. In a coordinated configuration, the outer peripheral wall of the front pad 31 has a plurality of force-bearing protrusions 311 evenly distributed along the circumference of the front pad 31. The outer surface of each force-bearing protrusion 311 is connected to the outer peripheral wall of the front pad 31 with a smooth arc surface. Adjacent force-bearing protrusions 311 combine to form a first slot 312. The inner peripheral wall of the rear pad 32 has a plurality of compression protrusions 321 evenly distributed along the circumference of the rear pad 32. The outer surface of each compression protrusion 321 is connected to the inner peripheral wall of the rear pad 32 with a smooth arc surface. Adjacent compression protrusions 321 combine to form a second slot 322. The plurality of force-bearing protrusions 311 correspond one-to-one with the plurality of second slots 322 and are interlocked. The plurality of compression protrusions 321 correspond one-to-one with the plurality of first slots 312 and are interlocked. The plurality of force-bearing protrusions 311 form a first slot 312. The extrusion protrusions 321 are arranged in a wave-like pattern. The force-bearing protrusions 311 are integrally formed with the front pad 31, and the extrusion protrusions 321 are integrally formed with the rear pad 32. A plurality of pre-tightening holes are evenly distributed circumferentially on the outer peripheral wall of the housing 1. These pre-tightening holes are located near and communicate with the sealing groove 131. The pre-tightening components include a plurality of pre-tightening bolts 4, each corresponding to a pre-tightening hole and threadedly connected. Each pre-tightening bolt 4 consists of a screw end 41 and a nut end 42. Each rear pad 32 has an embedded bone plate 323 made of metal. Each screw end 41 is rotatably connected to its adjacent bone plate 323.The nut end 42 is located on the outer periphery of the housing 1. The nut end 42 extends to form an operating handle 421 for external operation. A gasket 43 is provided between the bottom wall of the nut end 42 and the outer periphery of the housing 1. The gasket 43 has a through hole for the screw end 41 to pass through. The gasket 43 is made of elastic rubber.

[0016] The above-mentioned meter box installation and usage procedures are as follows: 1. Electronic component installation stage: First, install the external electronic components into the slots of the enclosure. The slots provide a stable space for the electronic components, ensuring that they are firmly fixed in the slots and preventing them from being affected by positional displacement during subsequent use. 2. Initial door closing stage: Operate the door to rotate along the movable connection structure (such as hinge) towards the box body, so that the door gradually closes onto the box body. During the process, ensure that the insert block set around the inner wall of the door is precisely aligned with the sealing groove of the receiving groove. Finally, the insert block is placed into the sealing groove. At this time, a sealing gap is formed between the outer peripheral wall of the insert block and the inner wall at the opening of the receiving groove. The sealing element (sealing gasket) in the gap initially fills the gap, completing the basic sealing fit. 3. Sealing pre-tightening strengthening stage: The operator holds the operating handle at the nut end of the pre-tightening bolt and rotates the pre-tightening bolt clockwise. Because the pre-tightening bolt is threadedly connected to the pre-tightening hole of the housing, the screw end is pushed towards the sealing groove when rotating, pushing the metal rib plate embedded in the rear gasket. The rib plate drives the sealing gasket (front gasket and rear gasket) to compress and deform within the sealing gap. By applying pre-tightening force to the sealing element, the contact surface of the inner peripheral wall of the sealing gasket is tightly fitted with the outer peripheral wall of the insert block. At the same time, the gasket on the bottom wall of the nut end is squeezed, filling the gap between the nut end and the outer peripheral wall of the housing, blocking the intrusion path of impurities at the pre-tightening hole. 4. Door locking and fixing stage: After the sealing pre-tightening operation is completed, operate the lock structure between the door and the box body, and lock the door and the box body by rotating the lock cylinder and engaging the latch, so as to prevent the door from being opened accidentally under external vibration, collision and other factors, and maintain the stable cooperation of the sealing structure. 5. Inspection and opening stage: When it is necessary to inspect the electronic components in the container, first operate the lock body structure to unlock, then turn the pre-tightening bolt counterclockwise. The screw end will retract to release the pre-tightening force on the seal. The elasticity of the seal will recover, reducing the resistance to the contact with the insert. Finally, turn the box door to make the insert disengage from the sealing groove, exposing the electronic components in the container for inspection. 6. Post-inspection reset stage: After the electronic components are inspected and repaired, repeat the steps of initial door closing, sealing pre-tightening and strengthening, and door locking and fixing to restore the meter box to a high-sealing state and ensure that the electronic components are continuously in a working environment isolated from external impurities.

[0017] The lock body structure in the above technology is existing technology, which is used to realize the locking connection between the door and the box body. Since it is existing technology, its structure and function will not be described in detail. In the above technology, the door and the box body are connected by a hinge to realize the swing of the door relative to the box body. This hinge method can use alloy parts such as hinges or hinges for connection. Since it is existing technology, its structure and function will not be described in detail.

[0018] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A highly airtight meter box, comprising a box body and a box door, wherein the box body has a receiving groove for installing and accommodating external electronic components, the box door is movably disposed on the box body to close or expose the receiving groove, and a locking structure for locking the box door is provided between the box door and the box body, characterized in that: A retaining edge is circumferentially arranged on the inner peripheral wall of the trough. The retaining edge is located near the opening of the trough and a sealing edge is circumferentially arranged on the retaining edge. The sealing edge is perpendicular to the retaining edge. The inner wall of the sealing edge, the top wall of the retaining edge, and the inner wall of the trough opening combine to form a sealing groove. A block is circumferentially arranged on the inner wall of the door for inserting into the sealing groove when the door is placed on the box body. The outer peripheral wall of the block and the inner wall of the trough opening are fitted together to form a sealing gap. A sealing element is provided in the sealing gap for filling the sealing gap. A pre-tightening element is provided on the box body for linkage with the sealing element to apply a pre-tightening force to the sealing element so that the sealing element and the block are sealed together.

2. The high-sealing meter box according to claim 1, characterized in that: The sealing element includes a plurality of sealing gaskets, which are evenly distributed in the sealing groove. The inner peripheral wall surface of the sealing gasket is a contact surface for abutting against the outer peripheral wall of the insert when the insert is placed into the sealing groove. The sealing gasket is made of elastic rubber material.

3. The high-sealing meter box according to claim 2, characterized in that: The sealing gasket is composed of a front gasket and a rear gasket stacked together. The outer peripheral wall of the front gasket and the inner peripheral wall of the rear gasket are tightly fitted together. Several force-bearing protrusions are evenly distributed along the circumference of the front gasket on the outer peripheral wall. The outer surface of the force-bearing protrusions is connected to the outer peripheral wall of the front gasket in a smooth arc. Adjacent force-bearing protrusions are combined to form a first groove. Several compression protrusions are evenly distributed along the circumference of the rear gasket on the inner peripheral wall. The outer surface of the compression protrusions is connected to the inner peripheral wall of the rear gasket in a smooth arc. Adjacent compression protrusions are combined to form a second groove. Several force-bearing protrusions correspond one-to-one with several second grooves and are interlocked. Several compression protrusions correspond one-to-one with several first grooves and are interlocked. Several force-bearing protrusions are combined in a wavy shape. Several compression protrusions are combined in a wavy shape. The force-bearing protrusions are integrally formed with the front gasket. The compression protrusions are integrally formed with the rear gasket.

4. The high-sealing meter box according to claim 3, characterized in that: The outer peripheral wall of the housing has a plurality of pre-tightening holes evenly distributed around it. The plurality of pre-tightening holes are located near the sealing groove and are all connected to the sealing groove. The pre-tightening component includes a plurality of pre-tightening bolts. The plurality of pre-tightening bolts correspond one-to-one with the plurality of pre-tightening holes and are threadedly connected. The pre-tightening bolt consists of a screw end and a nut end. Each rear gasket has an embedded bone plate. The bone plate is made of metal. Each screw end is rotatably connected to its adjacent bone plate. The nut end is located on the outer peripheral side of the housing and extends to have an operating handle for external operators to grip.

5. A high-sealing meter box according to claim 4, characterized in that: A gasket is provided between the bottom wall of the nut end and the outer peripheral wall of the housing. The gasket has a through hole for the screw end to pass through, and the gasket is made of elastic rubber.

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