Single-phase load identification intelligent electric energy meter

Abstract

The invention relates to a single-phase load identification intelligent ammeter, which relates to the technical field of ammeters, and comprises an ammeter body, a terminal cover and a fixing piece, the ammeter body is provided with a wiring area, a display area and a drainage channel penetrating through two sides of the ammeter body, and the terminal cover is hinged on the ammeter body and covers the wiring area and the drainage channel. The fixing member is used for detachably fixing the terminal cover on the ammeter body. The plugging part is arranged on the terminal cover, the plugging groove is arranged in the wiring area, the fixing piece is taken down from the plugging part to form an air guide flow channel between the plugging part and the wiring area, and the air guide flow channel is communicated with the drainage channel. Air is supplied to the plugging part through external air supply equipment, dust removal air can be blown into the wiring area along the air guide flow channel and is discharged through the drainage channel, dust in the wiring area can be cleaned under the condition that the terminal cover is not opened, the dust removal efficiency is improved, and the maintenance risk is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electric meters, and in particular to a single-phase load identification intelligent electric energy meter. Background Art

[0002] Currently, the wiring terminals of single-phase electricity meters are used to realize the input and output of current and voltage in order to accurately measure electrical energy. To ensure personal safety and measurement stability, the wiring area is usually equipped with a terminal cover and sealed to prevent illegal opening.

[0003] However, in actual use, especially when the electricity meter is installed in an environment with strong winds and dust, when maintenance personnel re-cover the terminal cover after inspection, dust is easily brought into the wiring area. The dust in the wiring area can easily cause a short circuit, affecting the use of the electricity meter, so the dust needs to be cleaned in time. If the operation is performed when the meter is powered on, it is not only difficult to clean, but there is also a risk of electric shock; if a thorough cleaning is required, the power must be turned off and the meter must be disassembled, which is a cumbersome process and inefficient. In addition, since the terminal cover is constrained by the seal, it cannot be opened unless under special circumstances, which further increases the difficulty of dust cleaning. It can be seen that the existing structure cannot achieve convenient cleaning of the wiring area without opening the terminal cover, and it is in urgent need of improvement. Summary of the Invention

[0004] An embodiment of the present application provides a single-phase load identification smart electricity meter, which can clean the wiring area without opening the terminal cover, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above object, a single-phase load identification smart energy meter is provided, comprising: An electric meter body having a wiring area, a display area, and a drainage channel, wherein the wiring area is provided on the lower surface of the electric meter body, the display area is provided on the upper surface of the electric meter body, and the drainage channel is provided on the electric meter body and on both sides of the wiring area, respectively, and the drainage channel penetrates the electric meter body; a terminal cover hingedly mounted on the meter body and used to cover the wiring area and the two drainage channels; A fixing member, a plug-in portion is provided on the terminal cover, and the wiring area has a plug-in slot, and the fixing member is configured to be detachably connected to the plug-in portion and the plug-in slot to fix the terminal cover in a position covering the wiring area; wherein, after the fixing member is removed from the plug-in portion, two air guide channels are formed in the plug-in portion and the wiring area, each of the air guide channels is connected to a drainage channel, and the end of the plug-in portion can be connected to the external air supply equipment after the fixing member is removed, so as to generate dust removal wind acting on the wiring area after the air supply equipment is started, and the dust removal wind can enter one of the drainage channels along each air guide channel and discharge the dust in the wiring area to the outside through the drainage channel.

[0006] Optionally, the fixing member includes a plug-in screw, a threaded hole is provided in the plug-in portion, the plug-in groove is a threaded groove, and the plug-in screw can be threadedly engaged with the threaded hole and the threaded groove at the same time to fix the terminal cover in the wiring area.

[0007] Optionally, the plug-in portion is configured so that when the terminal cover is in a preset position that completely covers the wiring area, the plug-in portion abuts against the surface of the wiring area, so that the threaded hole and the threaded groove are coaxially opposite and connected.

[0008] Optionally, a smooth hole is further provided in the plug-in portion, the smooth hole is coaxially connected to the threaded hole, the smooth hole is located in the lower area of ​​the plug-in portion, and the threaded hole is located in the upper area of ​​the plug-in portion; The thread groove is provided in the middle of the wiring area. A plurality of wiring terminals are provided on both sides of the thread groove in the wiring area. The wiring terminals are located in an extension path of the air guide channel.

[0009] Optionally, an inclined guide hole is opened in the inner wall of the plug-in portion, the upper end opening of the inclined guide hole is obliquely connected to the smooth hole, and the lower end opening of the inclined guide hole is inclined toward the wiring terminal of the wiring area; One end of the portion of the wiring area where the wiring terminals are provided is communicated with the inclined guide hole, and the other end of the portion of the wiring area where the wiring terminals are provided is communicated with the drainage channel; The threaded hole, the smooth hole, the inclined guide hole, and the gap between the terminal cover and the wiring area form the air guide channel.

[0010] Optionally, the inclined guide hole is configured such that the cross-sectional width gradually decreases from the side close to the smooth hole to the side close to the wiring terminal.

[0011] Optionally, an elastic shielding member is further provided in the thread groove, wherein: When the plug-in screw passes through the threaded hole and is inserted into the threaded groove, the elastic shielding member is in a compressed state under the pushing action of the plug-in screw and abuts against the end of the plug-in screw in the threaded groove; When the plug-in screw is withdrawn from both the thread groove and the threaded hole, the elastic shielding member changes from a compressed state to a natural state under the action of its own elastic force, and extends from the thread groove into the smooth hole to shield the thread groove, so that most of the dust removal wind entering from the threaded hole can enter the inclined guide hole under the guidance of the elastic shielding member.

[0012] Optionally, the elastic shielding member includes a spring and a rubber block, the first end of the spring is connected to the inner end wall of the thread groove, the second end of the spring is connected to the rubber block, and the radial width of the rubber block is greater than the inner diameter of the thread groove; The elastic force of the spring is greater than the friction force between the rubber block and the inner wall of the thread groove, and the elastic force of the spring is also greater than the friction force between the rubber block and the inner wall of the smooth hole.

[0013] Optionally, the rubber block is conical in shape, and when the spring is in a natural state, the inclined outer wall of the rubber block and the inclined lower inner wall of the inclined guide hole form a part of the path of the air guide channel.

[0014] Optionally, a sealing strip is provided on the edge of the terminal cover, and the sealing strip is used to seal against the edge end of the wiring area.

[0015] This application has at least the following beneficial effects: By providing a drainage channel on the meter body, a plug-in portion on the terminal cover, a plug-in slot in the wiring area, and a removable fixing, a continuous air flow channel is formed within the plug-in portion and the wiring area after the fixing is removed. The air flow channel is connected to the drainage channel. Therefore, without opening the terminal cover, an external air supply device can be connected to the plug-in portion, introducing dust-removing air into the wiring area and exhausting dust through the drainage channel. This structural design is beneficial to a certain extent in solving the problems of low maintenance efficiency, cumbersome operation, and high risk of electric shock caused by traditional electricity meters due to the terminal cover being restricted by the seal and unable to be opened at will, and the need to disconnect the power and disassemble the meter for cleaning. This solution allows dust removal operations to be performed while maintaining the integrity of the enclosed structure. It has the advantages of simple structure, easy operation, and strong adaptability. It helps to improve the long-term operational stability of the electricity meter in complex environments such as wind, sand, and dust, enhance its reliability and safety in field use, and make maintenance operations more practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0017] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0018] Figure 1 This is a structural diagram of a single-phase load identification smart energy meter provided in an embodiment of the present application; Figure 2 This is an exploded schematic diagram of removing a fixing member of a single-phase load identification smart energy meter provided in an embodiment of the present application; Figure 3 This is a structural diagram of a single-phase load identification smart energy meter with its terminal cover opened, provided in an embodiment of the present application; Figure 4 is a partial cross-sectional view of a single-phase load identification smart energy meter provided in an embodiment of the present application; Figure 5 yes Figure 4 The schematic structural diagram in the front view direction, wherein the straight dashed line portion represents the extension path of the drainage channel; Figure 6 yes Figure 5 A magnified view of part A in FIG; Figure 7 yes Figure 5 The schematic diagram of the structure after the plug screw is inserted, wherein the straight dashed line portion represents the extension path of the drainage channel; Figure 8 yes Figure 7 Enlarged view of part B in .

[0019] Description of reference numerals: 1. Meter body; 11. Wiring area; 111. Plug slot; 112. Wiring terminals; 12. Display area; 13. Drainage channel; 2. Terminal cover; 21. Connecting portion; 211. Threaded hole; 212. Smooth hole; 213. Inclined guide hole; 3. Fixing parts; 31. Insert screw; 4. Elastic shielding member; 41. Spring; 42. Rubber block; 5. Sealing strip. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0021] This application provides a single-phase load identification smart energy meter, please refer to Figure 1 、 Figure 2 and Figure 3 The electric energy meter includes a meter body 1, a terminal cover 2, and a fixing member 3. The meter body 1 has a wiring area 11, a display area 12, and a drainage channel 13. The wiring area 11 is provided on the lower surface of the meter body 1 for connecting to external circuits to realize the input and output of current and voltage signals. The display area 12 is provided on the upper surface of the meter body 1 for displaying electricity consumption parameters. The drainage channel 13 is located on the left and right sides of the meter body 1, one on each side, and penetrates the meter body 1 from both sides of the wiring area 11.

[0022] The drainage channels 13 provided in this embodiment are used to communicate with the air guide channels within the wiring area 11, thereby forming an air circulation path, which helps to remove dust from the wiring area 11 without opening the terminal cover 2. The terminal cover 2 is hingedly mounted on the meter body 1 and is used to cover the wiring area 11 and the two drainage channels 13 to provide protection, isolation, and shielding.

[0023] It is worth noting that the drainage channel 13 also has the function of heat dissipation. Because the wiring area 11 contains the wiring terminal 112, and the wiring terminal 112 will be connected to other electrical components during operation, the wiring area 11 will generate heat. After the terminal cover 2 covers the wiring area 11, the heat generated by the wiring area 11 cannot be effectively discharged. Therefore, the drainage channel 13 is set up to be both a channel for removing dust and a channel for heat dissipation. This application is based on the heat dissipation of the drainage channel 13 and additionally guides and removes dust. In addition, combined with Figure 3 and Figure 4 It can be seen that when the electricity meter is actually operated and installed, the drainage channel 13 runs through the front end to the rear end of the meter body 1, so that the opening of the drainage channel 13 away from the terminal cover 2 is close to the wall but not in contact with the wall (that is, there is a distance between the opening of the drainage channel 13 away from the terminal cover 2 and the wall). This can effectively prevent dust from entering, but it cannot be completely avoided. Therefore, dust and debris will still accumulate in the wiring area 11 after long-term use, so it is necessary to use the drainage channel 13 to deal with the dust.

[0024] Furthermore, the terminal cover 2 is provided with a plug-in portion 21, the wiring area 11 is provided with a plug-in slot 111, and the fixing member 3 is provided with a detachable structure. After being inserted into the plug-in portion 21, it can be further plugged into the plug-in slot 111, thereby fixing the terminal cover 2 in a position covering the wiring area 11, thereby achieving stable closure of the terminal cover 2.

[0025] It can be understood that when there is no need for cleaning, the fixing part 3 is in an inserted state, so that the terminal cover 2 is firmly installed, preventing debris from entering the wiring area 11, and avoiding problems such as structural instability caused by the loosening of the terminal cover 2. When dust or impurities appear in the wiring area 11 and affect use, the fixing part 3 can be removed from the plug-in part 21. At this time, two air guide channels are formed between the inside of the plug-in part 21 and the wiring area 11. The two air guide channels are respectively connected to the two drainage channels 13 on the meter body 1. The other end of the air guide channel is set to an open structure for connecting to the air supply port of an external air supply device. The air supply device can be a structure specially designed to cooperate with the plug-in part 21 to have a higher degree of matching when docking. After the air supply device is started, the external airflow enters the plug-in part 21 through the air supply port, passes through the air guide channel and acts on the wiring area 11, and driven by the airflow, the dust in the wiring area 11 is discharged to the outside of the meter through the drainage channels 13 on both sides.

[0026] The above-described structural arrangement allows for the formation of an airflow channel through the wiring area 11 by removing the fixing member 3 and connecting the air supply device, without disassembling the meter or disconnecting power. This reduces the impact of dust residue on metering functions or safety performance to a certain extent. This assists in dust removal while avoiding direct contact with live components, thereby improving the maintenance efficiency and safety of the meter. Furthermore, the removable design of the fixing member 3 not only secures and seals the terminal cover 2 but also collaborates with the dust removal function, enabling the structure to flexibly switch between routine protection and maintenance operations. In specific implementations, the cross-sectional area of ​​the drainage channel 13 can be structurally designed to match airflow requirements, and the air volume and pressure of the air supply device can be adjusted based on the specific volume of the wiring area 11 to achieve optimal cleaning results. Through the coordinated structural and functional arrangement of this embodiment, dust removal from the wiring area 11 is facilitated by establishing a connection between the drainage channel 13, the air guide channel, and the connector 21, without breaking the seal or opening the terminal cover 2. This provides excellent adaptability and ease of on-site operation.

[0027] It is worth noting that the seal refers to the fact that power companies usually require the installation of a seal to prevent unauthorized access to the terminal 112. This is a common industry practice and will not be elaborated on here.

[0028] In some embodiments, combined Figure 3 、 Figure 4The fixing member 3 adopts a plug-in screw 31 structure. The plug-in screw 31 can be threadedly connected to the threaded hole 211 set inside the plug-in part 21, and can also be threadedly connected to the plug-in groove 111 set in the wiring area 11 (that is, the thread groove. It is worth noting that since the plug-in groove 111 has been numbered, the subsequent thread grooves are not numbered). The plug-in screw 31 passes through the plug-in part 21 and is screwed into the wiring area 11, thereby establishing a detachable and firm connection structure between the plug-in part 21 and the wiring area 11.

[0029] It is understood that the arrangement of the plug screw 31 enables the terminal cover 2 to be in a state covering the wiring area 11. The plug screw 31 can be rotated to insert it into the threaded hole 211 and the threaded groove in sequence, thereby achieving the fixed installation of the terminal cover 2. When fixation is not required, if dust removal is required in the wiring area 11, the plug screw 31 can be unscrewed and removed from the threaded hole 211 and the threaded groove. At this time, the threaded hole 211 area of ​​the plug-in portion 21, which was originally used for connection, is transformed into a through-air channel, providing space for the subsequent docking of air supply equipment, so that it has the dual functions of air guide and fixation, which is beneficial to saving space and the number of components, and improving the integration of structural functions.

[0030] In this embodiment, the connection relationship between the plug-in part 21 and the wiring area 11 is achieved through a structural fitting design, that is, when the terminal cover 2 is in a preset position that completely covers the wiring area 11, the plug-in part 21 is abutted against the outer surface of the wiring area 11, so that the threaded hole 211 inside the plug-in part 21 is coaxially aligned with the threaded groove on the wiring area 11 in the axial direction, and a straight line channel that can be penetrated is formed. This structural matching relationship is not only beneficial to the smooth insertion and locking of the plug-in screw 31 during the connection process, but also facilitates the formation of an air guide channel after the screw is removed, thereby constructing a complete wind dust removal channel path.

[0031] Furthermore, since the plug-in portion 21 and the surface of the wiring area 11 are in a state of mutual abutment, relative movement can be limited to a certain extent, thereby improving the stability of the terminal cover 2 in the working state, and helping to reduce the problem of structural loosening caused by vibration or external force. The threaded matching method of the plug-in screw 31 is reversible and convenient, making the installation and removal process of the terminal cover 2 simple to operate and suitable for a variety of maintenance scenarios. Overall, through the matching design of the plug-in screw 31, the threaded hole 211 and the threaded groove, not only the terminal cover 2 has a stable fixing function, but also the wiring area 11 can quickly form an air guide structure when dust removal is required, which is beneficial for cleaning operations without opening the terminal cover 2, further enhancing the adaptability and maintenance convenience of the electric energy meter in special environments.

[0032] In some examples, combined Figure 4 、 Figure 5 and Figure 6To further optimize the structural configuration of the plug-in portion 21, while achieving its fixing function, it also helps guide the dust removal airflow through key areas within the wiring area 11, thereby improving the dust removal effect. In this embodiment, a smooth hole 212 is provided within the plug-in portion 21. The smooth hole 212 is located in the lower region of the plug-in portion 21 and is coaxially connected to the threaded hole 211 provided in the upper region of the plug-in portion 21. The threaded hole 211 is used to threadably engage with the plug screw 31 to secure the terminal cover 2 to the electricity meter body, while the smooth hole 212 is unthreaded and is used to cooperate with the subsequent air guide design.

[0033] Furthermore, since the inner wall surface of the smooth hole 212 is smooth, it is convenient to process the inclined guide hole 213 on its wall, avoiding interference or damage to the threaded hole 211 during the processing, thereby maintaining the normal performance of the plug-in screw 31. The inclined guide hole 213 is set in the inner wall of the plug-in part 21, and its upper end opening is obliquely connected to the smooth hole 212, while the lower end opening is inclined toward the terminal 112 of the wiring area 11, so that the airflow can be guided to the terminal 112 at a preset angle. In the wiring area 11, the threaded groove is located in the middle, which is used to cooperate with the plug-in screw 31. A plurality of terminal 112 are provided on both sides. These terminal 112 are in the extension path of the air guide channel and can become the main target area for the dust removal airflow.

[0034] It can be understood that after the plug screw 31 is removed from the plug-in portion 21, the threaded hole 211, the partially smooth hole 212, the inclined guide hole 213, and the gap formed between the terminal cover 2 and the wiring area 11 together constitute a continuous air guide channel. This air guide channel starts from the upper end opening of the plug-in portion 21, enters the smooth hole 212 through the threaded hole 211, guides the airflow toward the position of the wiring terminal 112 along the inclined guide hole 213, and then continues to flow along the gap between the terminal cover 2 and the wiring area 11, and finally connects with the drainage channel 13 to discharge dust to the outside. When the airflow passes through the gap between the terminal cover 2 and the wiring area 11, it will pass through the surface of the wiring terminal 112. This structural path is beneficial for effectively blowing away dust particles attached to the wiring terminal 112 and guiding them into the exhaust path. It is worth noting that in order to allow the dust removal wind flowing out of the inclined guide hole 213 to be better blown to the wiring terminal 112, a slope is formed on the surface of the wiring area 11 and on both sides of the plug-in slot 111, which is consistent with the extension direction of the inclined guide hole 213. This can reduce the loss of dust removal wind and has a guiding effect.

[0035] Through this structural design, the dust gathered around the terminal blocks 112 in the wiring area 11 can be removed to a certain extent without opening the terminal cover 2. The setting of the smooth hole 212 not only serves as part of the air guide path, but also provides structural processing conditions for the inclined guide holes 213, thereby improving the machinability and structural stability of the entire dust removal path. In addition, the angle setting of the inclined guide holes 213 can also be optimized and adjusted according to the internal structure of the wiring area 11, so that the airflow covers the distribution range of the terminal blocks 112 as much as possible, thereby improving the dust removal efficiency. In terms of the overall structural layout, the coaxial connection between the smooth hole 212 and the threaded hole 211 enables the plug-in screw 31 to completely penetrate the two in the fixed state, and does not affect the connectivity of the airflow channel in the disassembled state, providing a spatial basis for structural reuse between dust removal and fixing functions, and has good compatibility and practicality.

[0036] For example, Figure 7 、 Figure 8 As shown, the inclined guide hole 213 is configured to gradually reduce the cross-sectional width from the side close to the smooth hole 212 to the side close to the terminal 112. It is worth noting that from Figure 6 and Figure 7 It can be seen that the gradual decrease in the cross-sectional width of the inclined guide hole 213 from the side close to the smooth hole 212 to the side close to the terminal 112 is not very obvious, but there is actually a decrease, and the degree of reduction can be adaptively adjusted according to the working conditions. That is, the inclined guide hole 213 has a contraction-shaped channel structure. The setting of this structure can guide and accelerate the airflow to a certain extent. When the external air supply device is started, the dust-removing air first enters the threaded hole 211 through the upper port of the plug-in part 21, and then enters the inclined guide hole 213 through the smooth hole 212. During the airflow process, due to the gradual narrowing of the cross-sectional area of ​​the channel, according to the principle of fluid continuity and the Bernoulli effect, the airflow velocity increases accordingly, and the wind pressure increases relatively, so that the airflow has higher kinetic energy when it approaches the terminal 112 area. This increase in wind speed helps to enhance the cleaning effect of the terminal 112 surface, making it easier for dust or fine particles attached to it to detach from the surface under the action of stronger wind force and be carried away by the airflow. Furthermore, the gradually decreasing channel width helps suppress deviations in the airflow's diffusion direction, maintaining a high degree of directionality. Even after the airflow enters the gap between the terminal cover 2 and the wiring area 11, it retains relatively concentrated flow characteristics. Through this structural configuration, the inclined guide holes 213 not only provide guidance but also positively impact airflow velocity and wind force concentration, thereby improving dust removal efficiency in the wiring area 11 and broadening the applicability of the smart energy meter in complex environments such as those with high dust and pollution.

[0037] In some embodiments, combined Figure 4 、 Figure 5 and Figure 7 , an elastic shielding member 4 is also provided in the thread groove to solve the problem of dust accumulation and loss of dust removal air in the thread groove after the plug-in screw 31 is removed, while taking into account the positioning auxiliary effect of the plug-in screw 31 during the thread screwing process. Specifically, combined with Figure 6 and Figure 8 The elastic shielding member 4 specifically comprises a spring 41 and a rubber block 42. The first end of the spring 41 is connected to the inner end wall of the thread groove, and the second end of the spring 41 is connected to the rubber block 42. The radial width of the rubber block 42 is greater than the inner diameter of the thread groove. During the insertion of the plug screw 31, the rubber block 42 can be pushed deep into the thread groove, compressing the spring 41 and contacting the rubber block 42 against the end of the plug screw 31 to form an axial limit structure, providing feedback on the insertion stability.

[0038] It is understood that the presence of the rubber block 42 does not hinder the screwing of the plug screw 31. This is because the rubber material has a certain degree of flexibility, and the structural design of the guide function in the thread groove allows the plug screw 31 to smoothly push the rubber block 42 and form axial contact during the rotation and advancement process. This contact not only improves the tightness of the plug screw 31 in the fixed state, but also allows the operator to determine whether the screw is rotated to the specified position through tactile feedback when turning the plug screw 31, which provides a certain degree of assembly convenience.

[0039] Furthermore, when the plug screw 31 is withdrawn, the elastic force of the spring 41 causes the rubber block 42 to return to its natural state, rebounding from the middle of the thread groove into the smooth hole 212 area above, thereby blocking the thread groove opening. Because the radial width of the rubber block 42 is greater than the inner diameter of the thread groove, it can block the cross-section of the thread groove to a certain extent, reducing the possibility of dust or foreign matter entering. Furthermore, the presence of the rubber block 42 can also provide a certain degree of guidance for the flow of dust removal air. When the external air supply device delivers dust removal air through the upper end of the plug-in portion 21, the air flows through the channel between the threaded hole 211 and the smooth hole 212. After encountering the rubber block 42 that rebounds into the smooth hole 212, the shape of the rubber block 42 can be used to guide and distribute the airflow, deflecting most of the airflow toward the inclined guide hole 213. This increases the proportion of airflow entering the inclined guide hole 213, reduces the ineffective dissipation of wind energy within the thread groove, and enhances the purge efficiency of the terminal 112 area.

[0040] For example, to further enhance the airflow guiding effect, the rubber block 42 is designed to be a cone. The inclined surface of the cone contacts the inclined lower inner wall of the inclined guide hole 213 when the spring 41 is in its natural state, thereby forming a continuous path for the air guide channel. The conical structure has a natural streamlined inclined surface, which can guide the dust removal airflow to deflect downward when it flows through the conical surface of the rubber block 42, enter the inclined guide hole 213, and further flow through the surface of the terminal 112 to be discharged through the drainage channel 13. This setting method not only improves the air guidance efficiency, but also can divert the airflow to a certain extent, so that the dust removal air forms multiple action surfaces after entering the area, thereby improving the dust removal coverage of the terminal 112.

[0041] It is understood that in the structural setting of the elastic shielding member 4, the elastic force design of the spring 41 also needs to be parameter controlled. The elastic force needs to be greater than the friction force of the rubber block 42 during the sliding process between the thread groove and the inner wall of the smooth hole 212, so as to ensure that the rubber block 42 can overcome the friction and rebound to the natural state under the action of the spring 41, while maintaining the stability of the shielding state. If the elastic force is too small, the rubber block 42 cannot complete the effective rebound, which may affect the subsequent dust removal air guide path. If the elastic force is too large, the resistance of the plug-in screw 31 during the insertion process is too high, affecting the installation operation, so it is necessary to make a trade-off in the design.

[0042] Furthermore, when rubber block 42 is in its natural state, the conical surface must fit snugly against the lower wall of the inclined guide holes 213 to form a continuous airflow channel structure. This structural arrangement prevents turbulence in the dust removal air before it enters the terminal block 112 area, improving airflow stability and enhancing the purge effect. The conical surface's uniform airflow diversion at the center of the structure also allows the symmetrically arranged inclined guide holes 213 to each receive airflow support, thereby improving the overall dust removal coverage of the terminal block 112 area.

[0043] In summary, this embodiment uses the elastic shielding member 4 composed of the rubber block 42 and the spring 41 to actively shield the thread groove after the fixing member 3 is removed, and at the same time diverts and guides the airflow during the entry of the dust removal wind, thereby improving the cleaning effect while maintaining the plug-in reliability, providing a good functional expansion solution for the on-site maintenance of single-phase electricity meters, and is suitable for the cleaning structure optimization solution of the terminal 112 of the electricity meter in a dusty environment.

[0044] In some embodiments, as Figure 3 、 Figure 4 and Figure 5As shown, a sealing strip 5 is provided at the edge of the terminal cover 2. The sealing strip 5 is made of an elastic material, such as silicone or rubber, and is arranged in a continuous ring shape around the edge of the terminal cover 2. When the terminal cover 2 is in a preset closed state, covering the wiring area 11, the sealing strip 5 forms a sealed abutment with the edge of the wiring area 11. Based on this structure, when dust inside the wiring area 11 needs to be removed, the plug screw 31 is removed from the plug portion 21, and the external air supply device delivers dust-removing air into the electricity meter through the upper opening of the plug portion 21. Because the sealing strip 5 forms a relatively sealed closed structure with the edge of the wiring area 11, the dust-removing air is essentially prevented from leaking through the gap between the terminal cover 2 and the wiring area 11, thereby structurally limiting the dust-removing air's path. The dust-removing air is guided into the air guide duct and discharged from the wiring area 11 through the drainage channel 13. This helps enhance the directional blowing capability of the dust-removing air, focusing the dust-removing air on the wiring area 11, particularly the surface of the terminal 112. Furthermore, due to the elastic fit between the sealing strip 5 and the edge of the wiring area 11, this structure also provides a preliminary dustproof effect within the wiring area 11 to a certain extent, preventing ambient dust from entering the wiring area through the gap between the terminal cover 2 and the edge of the wiring area 11, thereby enhancing the protective integrity of the structure. Therefore, within the overall structural design, the provision of the sealing strip 5 not only isolates external dust but also helps maintain the flow stability and guidance of the dust removal air, thereby enhancing the dust removal effect, reducing wind loss, and improving the cleaning efficiency of the wiring area 11.

[0045] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0046] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0047] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0048] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A single-phase load identification smart energy meter, characterized in that: include: An electric meter body (1) comprises a wiring area (11), a display area (12) and a drainage channel (13), wherein the wiring area (11) is provided on the lower surface of the electric meter body (1), the display area (12) is provided on the upper surface of the electric meter body (1), and the drainage channel (13) is provided on the electric meter body (1) and is located on both sides of the wiring area (11), respectively, and the drainage channel (13) passes through the electric meter body (1); A terminal cover (2) is hingedly mounted on the electric meter body (1) and is used to cover the wiring area (11) and the two drainage channels (13); The fixing member (3) is provided with a plug-in portion (21) on the terminal cover (2), and the wiring area (11) has a plug-in slot (111). The fixing member (3) is configured to be detachably connected to the plug-in portion (21) and the plug-in slot (111) to fix the terminal cover (2) in a position covering the wiring area (11); wherein, after the fixing member (3) is removed from the plug-in portion (21), the fixing member (3) is placed in the plug-in portion (21) and in the wiring area ( Two air guide channels are formed in the wiring area (11), each of the air guide channels is connected to one of the drainage channels (13), and the end of the plug-in portion (21) can be connected to an external air supply device after the fixing member (3) is removed, so as to generate dust removal wind acting on the wiring area (11) after the air supply device is started, and the dust removal wind can enter one of the drainage channels (13) along each air guide channel and discharge the dust in the wiring area (11) to the outside through the drainage channel (13).

2. The single-phase load identification smart energy meter according to claim 1, characterized in that: The fixing member (3) includes a plug screw (31), a threaded hole (211) is provided in the plug portion (21), the plug slot (111) is a threaded slot, and the plug screw (31) can simultaneously engage with the threaded hole (211) and the threaded slot to fix the terminal cover (2) to the wiring area (11).

3. The single-phase load identification smart energy meter according to claim 2, characterized in that: The plug-in portion (21) is configured such that, when the terminal cover (2) is in a preset position that completely covers the wiring area (11), the plug-in portion (21) abuts against the surface of the wiring area (11), so that the threaded hole (211) and the threaded groove are coaxially aligned and connected.

4. The single-phase load identification smart energy meter according to claim 2, characterized in that: A smooth hole (212) is further provided in the plug-in portion (21), the smooth hole (212) being coaxially connected to the threaded hole (211), the smooth hole (212) being located in a lower region of the plug-in portion (21), and the threaded hole (211) being located in an upper region of the plug-in portion (21); The thread groove is provided in the middle of the wiring area (11), and a plurality of wiring terminals (112) are provided on both sides of the thread groove in the wiring area (11), and the wiring terminals (112) are located in an extension path of the air guide channel.

5. The single-phase load identification smart energy meter according to claim 4, characterized in that: An inclined guide hole (213) is provided in the inner wall of the plug-in portion (21), the upper end opening of the inclined guide hole (213) is obliquely connected to the smooth hole (212), and the lower end opening of the inclined guide hole (213) is obliquely directed toward the connection terminal (112) of the connection area (11); One end of the portion of the wiring area (11) provided with the wiring terminal (112) is in communication with the inclined guide hole (213), and the other end of the portion of the wiring area (11) provided with the wiring terminal (112) is in communication with the drainage channel (13); The threaded hole (211), the smooth hole (212), the inclined guide hole (213), and the gap between the terminal cover (2) and the wiring area (11) form the air guide channel.

6. The single-phase load identification smart energy meter according to claim 5, characterized in that: The inclined guide hole (213) is configured such that the cross-sectional width gradually decreases from the side close to the smooth hole (212) to the side close to the connection terminal (112).

7. The single-phase load identification smart energy meter according to claim 6, characterized in that: An elastic shielding member (4) is also provided in the thread groove, wherein: When the plug-in screw (31) passes through the threaded hole (211) and is inserted into the threaded groove, the elastic shielding member (4) is in a compressed state under the pushing action of the plug-in screw (31) and abuts against the end of the plug-in screw (31) in the threaded groove; When the plug-in screw (31) is withdrawn from both the thread groove and the threaded hole (211), the elastic shielding member (4) changes from a compressed state to a natural state under the action of its own elastic force, and extends from the thread groove into the smooth hole (212) to shield the thread groove, so that the dust removal wind entering from the threaded hole (211) can mostly enter the inclined guide hole (213) under the guidance of the elastic shielding member (4).

8. The single-phase load identification smart energy meter according to claim 7, characterized in that: The elastic shielding member (4) comprises a spring (41) and a rubber block (42), wherein a first end of the spring (41) is connected to an inner end wall of the thread groove, a second end of the spring (41) is connected to the rubber block (42), and a radial width of the rubber block (42) is greater than an inner diameter of the thread groove; The elastic force of the spring (41) is greater than the friction force between the rubber block (42) and the inner wall of the thread groove, and the elastic force of the spring (41) is also greater than the friction force between the rubber block (42) and the inner wall of the smooth hole (212).

9. The single-phase load identification smart energy meter according to claim 8, characterized in that: The rubber block (42) is conical in shape, and when the spring (41) is in a natural state, the inclined outer wall of the rubber block (42) and the inclined lower inner wall of the inclined guide hole (213) form a part of the path of the air guide channel.

10. The single-phase load identification smart energy meter according to any one of claims 1 to 9, characterized in that: The edge of the terminal cover (2) is provided with a sealing strip (5), and the sealing strip (5) is used for sealingly abutting against the edge end of the wiring area (11).

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