A new electric well lid with security lock

Abstract

The utility model belongs to the technical field of well lid discloses a novel electric power well lid with security lock, it includes well seat, outer cover and inner cover, wherein, the inner cover detachable connection is in the well seat inside, the outer cover detachable connection is in the well seat top, the well seat top is equipped with the embedding groove for embedding the outer cover, the inner edge of embedding groove is equipped with locking groove, the outer cover edge is equipped with the locking convex that matches with locking groove, locking convex is embedded locking groove and is locked through locking assembly after this. The utility model simple structure, through the double -deck design of outer cover and inner cover realizes double protection, is not easy to shift and is stolen, can effectively protect the pedestrian and the car safety, mechanical strength and stability are good, and the practicality is strong. In addition, the locking mechanism of the utility model adopts the NFC turning tongue lock, can realize quick unlocking, need not to carry additional key or card, has improved the convenience of use greatly.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically to a new type of electric manhole cover with a security lock. Background Technology

[0002] As the "lifeline project" of modern urban operations, the safety and reliability of manhole covers, ancillary facilities of urban underground pipeline systems, directly affect public safety and urban operational efficiency. Electricity manhole covers, as key connection points between underground power transmission networks and the surface, bear important functions such as power cable maintenance and fault diagnosis, and are essential infrastructure for ensuring a stable urban power supply. With the acceleration of urbanization, traditional manhole cover technology systems are no longer sufficient to meet the complex needs of modern urban management. The main shortcomings of current manhole cover systems include:

[0003] 1. Manhole covers directly embedded in the manhole base are prone to loss and have poor stability. Currently, most manhole covers use a socket-type fitting method, in which the edge of the manhole cover is directly inserted into the groove of the manhole base. Although this method is convenient for installation, it is prone to displacement or theft. After the manhole cover is separated from the manhole base, it is easy for pedestrians to fall due to its position, and it may even cause secondary accidents such as tire blowouts due to vehicles running over and damaging the manhole cover.

[0004] 2. Insufficient structural durability leads to secondary disasters. Most current manhole covers are made of gray cast iron or recycled resin, whose compressive strength (typically ≤36MPa) is insufficient to meet the demands of heavy traffic. Under long-term dynamic loads, the gap between the manhole cover and the base increases year by year, leading to increased settlement of the surrounding road surface. This structural failure not only increases the damage rate around the manhole, but damaged manhole covers, if not repaired in time, can cause a chain reaction of damage to surrounding facilities, creating regional road safety hazards.

[0005] It is evident that the existing manhole cover technology system has systemic deficiencies in terms of security reliability and structural durability. With the deepening of smart city construction, there is an urgent need to improve manhole covers in order to overcome the technical bottlenecks in urban safety operation. Utility Model Content

[0006] The purpose of this utility model is to propose a new type of power manhole cover with a security lock. It has a simple structure and achieves double protection through the double-layer design of the outer and inner covers. It is not easy to shift or be stolen, and can effectively protect the safety of pedestrians and vehicles. It has good mechanical strength and stability and is highly practical.

[0007] The technical solution adopted to achieve the purpose of this utility model is:

[0008] A novel power manhole cover with a security lock includes a manhole base, an outer cover, and an inner cover. The inner cover is detachably connected to the inside of the manhole base, and the outer cover is detachably connected to the top of the manhole base. The top of the manhole base is provided with an embedding groove for embedding the outer cover. The inner edge of the embedding groove is provided with a locking groove, and the edge of the outer cover is provided with a locking protrusion that matches the locking groove. After the locking protrusion is embedded in the locking groove, it is locked by a locking assembly.

[0009] Furthermore, the portion of the outer cover embedded in the well base has a structure that is wider at the top and narrower at the bottom, and the bottom of the outer cover is provided with several reinforcing plates.

[0010] Furthermore, reinforcing ribs are provided on the outer periphery of the well base.

[0011] Furthermore, a mounting base for fixing the locking assembly is provided in the locking groove;

[0012] The locking assembly includes a locking bolt and a locking nut. The lower end of the locking bolt is fixed in the mounting base, and the upper end is located in the locking groove. A fixing groove is provided on the locking protrusion, and a locking hole is provided on the fixing groove. After the outer cover is inserted into the embedding groove, the upper end of the locking bolt extends out of the locking hole and cooperates with the locking nut in the fixing groove.

[0013] Furthermore, a sealing cap is provided at the top of the fixing groove.

[0014] Furthermore, the well base is equipped with a support block for supporting the inner cover.

[0015] Furthermore, a snap-fit ​​block is provided below the bearing block, and a locking mechanism is provided on the inner cover; the locking mechanism includes a locking tongue, which is embedded in the area between the bearing block and the snap-fit ​​block to lock the inner cover in the well seat.

[0016] Furthermore, the inner wall of the well base is movably connected to a limiting component; the limiting component is embedded in the inner wall of the well base when the inner cover is installed, and pops out and locks onto the top of the inner cover after the inner cover is placed.

[0017] Furthermore, a monitoring terminal is installed on the well base, which includes a monitoring module and a communication module; the monitoring terminal and the locking mechanism utilize NB-IoT to connect to an IoT cloud service monitoring platform, a handheld terminal, or a mobile APP; the locking mechanism is equipped with a WIFI module for data transmission.

[0018] Furthermore, RFID electronic tags are also installed on the outer cover.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The locking groove embedded in the inner edge of the slot at the top of the manhole base and the locking protrusion on the edge of the outer cover constitute the basic structure of the security lock. Their matching design forms the first physical barrier, restricting the outer cover from moving freely. After the locking protrusion is embedded in the locking groove, the connection between the outer cover and the manhole base can be further reinforced by operating the locking assembly. The double-layer design of the outer and inner covers provides dual protection; even if the outer cover is lost, the inner cover can still provide protection, preventing pedestrians or other objects from falling into the manhole and preventing water from flowing out of the pipe.

[0021] 2. Compared with the traditional socket-type fitting method, the system of this device uses a locking component to lock the manhole base and the manhole cover, which can not only prevent the manhole cover from shifting and jumping, but also play a certain role in preventing theft. It has good stability and strong practicality.

[0022] 3. The bottom of the outer cover of this device is designed with a structure that is wider at the top and narrower at the bottom, which can enhance the mechanical strength and stability of the device, and also distribute the concentrated force to the edge of the well seat, reduce the risk of stress concentration at the edge of the well cover, and extend the service life;

[0023] 4. The reinforcing ribs in this device can increase the strength and thickness of the manhole cover, making it much more difficult to damage the manhole cover and indirectly protecting the manhole cover from being stolen.

[0024] 5. The locking mechanism of this utility model uses an NFC rotary lock that can be operated by a mobile phone or other device that supports NFC, enabling quick unlocking without the need to carry an additional key or card, greatly improving the convenience of use.

[0025] 6. By setting electronic tags on manhole covers, it is convenient to identify and manage manhole cover information. The monitoring terminal on the manhole base can realize the monitoring of manhole cover status, abnormal opening, maintenance management, abnormal closing, and real-time alarm. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall positional relationship of this utility model.

[0028] Figure 2 This is a three-dimensional structural diagram of the fit between the well base and the inner cover of this utility model.

[0029] Figure 3 This is a top view schematic diagram of the fit between the well base and the inner cover of this utility model.

[0030] Figure 4 This is a three-dimensional structural diagram of a well base of this utility model.

[0031] Figure 5 This is a structural schematic diagram of the well base of this utility model from another perspective.

[0032] Figure 6 This is a structural schematic diagram of the well base of this utility model from another perspective.

[0033] Figure 7 This is an enlarged schematic diagram of the well base and locking mechanism in this utility model.

[0034] Figure 8 This is a three-dimensional structural diagram of the outer cover of this utility model.

[0035] Figure 9 This is a structural schematic diagram of the outer cover of this utility model from another perspective.

[0036] Figure 10 This is a side view schematic diagram of the inner cover and locking mechanism of this utility model.

[0037] Figure 11 This is a three-dimensional structural diagram of the inner cover and locking mechanism of this utility model.

[0038] Figure 12 yes Figure 11 A structural diagram from another perspective.

[0039] Figure 13 This is a schematic diagram of the structure of a sealing cap of this utility model.

[0040] Figure 14 This is a structural schematic diagram of the sealing cap of this utility model from another perspective.

[0041] Figure 15 This is a schematic diagram illustrating the communication relationship between the various modules in an embodiment of this utility model.

[0042] Figure 16 This is a schematic diagram of the circuit connection relationship of the NFC module in this utility model.

[0043] Figure 17 This is a schematic diagram of the circuit connection for the unlocking module.

[0044] Figure 18 This is a schematic diagram of the circuit connection relationship of a communication module.

[0045] Figure 19 This is a schematic diagram of the circuit connection relationship of a WIFI module.

[0046] In the diagram: 1. Well base; 2. Outer cover; 3. Inner cover; 4. Embedded groove; 5. Locking groove; 6. Locking protrusion; 7. Locking assembly; 8. Rib plate; 9. Reinforcing rib; 10. Mounting base; 11. Fixing groove; 12. Locking hole; 13. Sealing cover; 14. Bearing block; 15. Snap-fit ​​block; 16. Locking mechanism; 17. Locking tongue; 18. Limiting component; 19. Mounting groove; 20. Snap-fit ​​protrusion;

[0047] 701. Locking bolt; 702. Locking nut. Detailed Implementation

[0048] The illustrated embodiments are provided to better illustrate the present invention, but the content of the present invention is not limited to the illustrated embodiments. Therefore, non-essential improvements and adjustments made to the implementation schemes by those skilled in the art based on the above-described content of the present invention still fall within the protection scope of the present invention.

[0049] like Figures 1 to 14 As shown, a novel power manhole cover with a security lock includes a manhole base 1, an outer cover 2, and an inner cover 3. The inner cover 3 is detachably connected to the inside of the manhole base 1, and the outer cover 2 is detachably connected to the top of the manhole base 1. The top of the manhole base 1 is provided with an embedding groove 4 for embedding the outer cover 2. The inner edge of the embedding groove 4 is provided with a locking groove 5, and the edge of the outer cover 2 is provided with a locking protrusion 6 that matches the locking groove 5. After the locking protrusion 6 is embedded in the locking groove 5, it is locked by a locking assembly 7.

[0050] The locking groove embedded in the inner edge of the top of the manhole base and the locking protrusion on the edge of the outer cover constitute the basic structure of the security lock. Their matching design forms the first physical barrier, restricting the outer cover from moving freely. When the outer cover is installed, the locking protrusion precisely embeds into the locking groove, initially fixing the position of the outer cover and ensuring a tight fit between the outer cover and the manhole base, resisting prying by conventional external forces. The locking assembly is the key to the security lock's function. After the locking protrusion is embedded into the locking groove, operating the locking assembly further strengthens the connection between the outer cover and the manhole base. The double-layer design of the outer cover 2 and the inner cover 3 provides double protection. Even if the outer cover 2 is lost, the inner cover 3 can still provide protection, preventing pedestrians or other objects from falling into the manhole and preventing water from flowing out of the pipe. Compared with the traditional socket-type fitting method, this system uses the locking assembly 7 to lock the manhole base 1 and the manhole cover during installation. This not only prevents the manhole cover from shifting or jumping, but also provides a certain degree of anti-theft protection, offering good stability and strong practicality. Furthermore, this invention features a locking groove 5 on the manhole base 1 that engages with a locking protrusion 6 on the outer cover 2, further preventing horizontal displacement of the outer cover 2 and ensuring stability during use. In this invention, the minimum thickness of the manhole cover is 3.5cm, and the overall thickness exceeds 13cm, significantly increasing the load-bearing capacity of the outer cover 2. Compared to commonly used manhole covers, it offers superior resistance to breakage and deformation. This invention also allows for the installation of RFID electronic tags for convenient identification and management.

[0051] The number of locking grooves 5 and locking protrusions 6 corresponds to the number of two or more, and they are evenly distributed on the manhole base 1 and the outer cover 2. In a preferred embodiment of this utility model, the number of locking grooves 5 and locking protrusions 6 is four. The manhole cover of this utility model is made entirely of ductile iron, which has high structural strength. The surface is treated with hot-dip asphalt anti-corrosion process, which can fully penetrate and completely cover the manhole cover, thus extending its service life. In addition, the manhole cover of this utility model is surrounded by a high-strength concealed ductile rubber ring to completely surround the cover surface, avoiding "iron-on-iron" contact and eliminating noise.

[0052] like Figure 1 , Figure 8 and Figure 9 As shown, in this utility model, the part of the outer cover 2 embedded in the well base 1 has a structure that is wider at the top and narrower at the bottom, and the bottom of the outer cover 2 is provided with several reinforcing plates 8.

[0053] The bottom of the outer cover 2 is circular, with a design that is wider at the top and narrower at the bottom, giving it an overall conical shape. When this manhole cover with the above-described structure is fitted into the manhole base 1, it can be further compacted by its own weight and vehicle pressure, reducing gaps and preventing rainwater from seeping into the well and corroding pipes or cables. Furthermore, when a vehicle passes over it, the conical structure disperses the concentrated force to the edge of the manhole base 1, reducing the risk of stress concentration at the edge of the manhole cover and extending its service life. If the manhole cover is completely horizontal, lateral forces (such as those from vehicle tires) may cause it to tilt. A tilted manhole cover has a larger contact area with the well wall, enhancing its resistance to lateral impacts.

[0054] The bottom of the outer cover 2 is composed of several reinforcing plates 8, which mainly serve to strengthen the mechanical strength of the outer cover 2. Using several plates also reduces the weight at the bottom. The reinforcing plates 8 have a triangular structure, and the hypotenuse of the triangle contacts the well frame.

[0055] like Figure 1 , Figures 4 to 6 As shown, in this invention, the manhole cover 1 is provided with reinforcing ribs 9 on its outer periphery. The reinforcing ribs 9 increase the strength and thickness of the manhole cover 1, significantly increasing the difficulty of damaging it and indirectly protecting the manhole cover from theft. Furthermore, the reinforcing ribs 9 increase the contact area between the manhole cover 1 and the road surface, distributing the concentrated load applied by vehicles or pedestrians to a wider area. For example, when a vehicle runs over the manhole cover, the reinforcing ribs 9 transfer the pressure to the ground around the manhole cover 1, preventing localized cracking due to stress concentration. During actual installation, the reinforcing ribs 9 are embedded in the concrete or asphalt layer around the manhole cover 1, forming an interlocking structure to prevent the manhole cover 1 from moving horizontally due to soil settlement, vibration, or external impact, further improving the stability of the device.

[0056] like Figure 2 , Figures 4 to 6 As shown, a mounting base 10 for fixing the locking assembly 7 is provided in the locking groove 5; the locking assembly 7 includes a locking bolt 701 and a locking nut 702, the lower end of the locking bolt 701 is fixed in the mounting base 10, and the upper end is located in the locking groove 5; a fixing groove 11 is provided on the locking protrusion 6, and a locking hole 12 is provided on the fixing groove 11; after the outer cover 2 is inserted into the embedding groove 4, the upper end of the locking bolt 701 extends out of the locking hole 12 and cooperates with the locking nut 702 in the fixing groove 11. This utility model locks the outer cover 2 onto the well base 1 through the above structure, which can increase the difficulty of theft and reduce the probability of the outer cover 2 being stolen.

[0057] In the present utility model, an installation groove 19 is provided on the mounting base 10. The notch at the top of the installation groove 19 is in a "convex" shape structure, and the shape of the fixing groove 11 is a "convex" shape structure matching the installation groove 19. When placing the locking bolt 701 into the mounting base 10, first insert the lower end of the locking bolt 701 into the fixing groove 11 from the larger opening of the "convex" shape structure installation groove 19, and then move it to the smaller opening of the "convex" shape structure installation groove 19, so that the stud of the locking bolt 701 extends out from the smaller opening.

[0058] The diameter of the smaller opening of the installation groove 19 is larger than the diameter of the stud on the locking nut 702, but smaller than the diameter of the nut. Therefore, after the stud of the locking bolt 701 extends out from the smaller opening, it can prevent the bottom of the locking bolt 701 from being pulled out of the opening.

[0059] After embedding the outer cover 2 into the well seat 1, the position of the fixing groove 11 on the locking protrusion 6 corresponds exactly to the position of the installation groove 19, and the lock hole 12 at the bottom of the fixing groove 11 is a "convex" shape structure matching the installation groove 19. The upper end of the locking bolt 701 extends out of the lock hole 12 and cooperates with the locking nut 702 in the fixing groove 11, thereby fastening the outer cover 2 on the well seat 1. To ensure the sealing performance of the device, a sealing cover 13 is further provided at the top of the fixing groove 11 (specifically as shown in Figure 13 and Figure 14 ), and the bottom of the sealing cover 13 is a "convex" shape structure matching the fixing groove 11 and the installation groove 19. A clamping protrusion 20 is provided at the edge of one end of the bottom of the sealing cover 13 that cooperates with the larger openings of the "convex" shape structure installation groove 19 and the fixing groove 11. After the locking component 7 is installed, embed the sealing cover 13 into the fixing groove 11, and then press it down until the clamping protrusion 20 is embedded into the installation groove 19 and clamped. The clamping principle of the sealing cover 13 is similar to the clamping principle of a common pen cap.

[0060] In the present utility model, the outer cover 2 and the well seat 1 are locked by a hidden bolt, so that the outer cover 2 is closely fitted on the well seat 1, which can prevent the phenomenon of the cover jumping (flying off) caused by reasons such as repeated vehicle rolling, abnormal air pressure in the cable well pipeline, water gushing in the cable well, sudden gas in the well or impact of cable joint failure.

[0061] As Figures 4 to 7 shown, in the present utility model, a bearing block 14 for bearing the inner cover 3 is provided inside the well seat 1. The bearing block 14 supports the edge of the inner cover 3 after the inner cover 3 is embedded, preventing the inner cover 3 from falling into the well.

[0062] In the present utility model, a clamping block 15 is provided below the bearing block 14, and a locking mechanism 16 is provided on the inner cover 3; the locking mechanism 16 includes a lock tongue 17, and the lock tongue 17 is embedded in the area between the bearing block 14 and the clamping block 15 to lock the inner cover 3 in the well seat 1.

[0063] The locking mechanism 16 in this invention is a common combination lock or NFC lock. This invention preferably uses an NFC lock, such as the passive NFC lock with models DN-1888NFC-20 or DN-1888NFC-30. When the inner cover 3 is embedded in the well base 1, the latch 17 of the locking mechanism 16 is rotated to face the center of the inner cover 3. After the inner cover 3 is embedded in the well base 1, the locking mechanism 16 is activated to rotate the latch 17 to the area between the support block 14 and the locking block 15, thereby locking the inner cover 3. To unlock, the NFC function of a mobile phone or other NFC device can be used for remote unlocking.

[0064] The passive NFC in the rotary latch lock utilizes electromagnetic induction to obtain energy from external devices. Simply operating an NFC-enabled mobile phone or other device enables quick unlocking, eliminating the need for additional keys or cards and significantly improving ease of use. In this embodiment, the passive NFC rotary latch lock, model DN-1888NFC-20 or DN-1888NFC-30, also supports connection to a smartphone app, enabling remote authorization, unlocking record retrieval, and other functions, facilitating remote monitoring and management of the lock by administrators. Figure 15 As shown, the NFC rotary tongue lock can also use active NFC, powered by a 24VDC power supply.

[0065] like Figures 2 to 6 As shown, in this utility model, the inner wall of the well base 1 is movably connected to a limiting member 18; the limiting member 18 is embedded in the inner wall of the well base 1 when the inner cover 3 is installed, and pops out and is stuck above the inner cover 3 after the inner cover 3 is placed.

[0066] A receiving cavity is formed on the inner wall of the well base 1. A spring is installed in the receiving cavity, with one end of the spring fixed inside the receiving cavity and the other end fixedly connected to the limiting member 18. The limiting member 18 can be a plate-like structure, or a smooth spherical or teardrop-shaped structure. When a plate-like structure is selected, the operator needs to press inward to push the limiting member 18 into the receiving cavity. Therefore, this utility model preferably uses a smooth spherical or teardrop-shaped structure for the limiting member 18. When installing the inner cover 3, the inner cover 3 can be tilted first, and then the lower end can be pressed against the limiting member 18 to squeeze the limiting member 18 into the receiving cavity. Then, the entire inner cover 3 is placed into the well base 1 and locked. When the entire inner cover 3 is placed on the bearing block 14, the locking of the limiting member 18 is released. The limiting member 18 pops out and locks above the inner cover 3, further securing the inner cover 3 and preventing it from shifting up and down.

[0067] In this utility model, the locking assembly 7 used to connect the outer cover 2 and the well base 1 can also be an anti-theft electronic lock. This anti-theft electronic lock is a common type of anti-theft electronic lock available on the market, such as the patent with publication number CN115217153A entitled "A Well Cover and a Well Cover Electronic Lock Status Monitoring Device and Method". It can also be other common well cover electronic locks available on the market. The electronic locking method greatly reduces the risk of well cover loss and unauthorized entry into the well. While equipping the well cover with an electronic lock, the electronic lock can communicate with a cloud platform to transmit the well cover status data to the cloud platform, further enabling real-time monitoring of the well cover status.

[0068] like Figure 15 As shown, in one embodiment of this utility model, the outer cover 2 is also equipped with an RFID electronic tag. A smart device receiving cavity (not shown) is reserved on the manhole base. A monitoring terminal is installed in the receiving cavity. The monitoring terminal can be installed as needed to realize functions such as manhole cover positioning, cover opening alarm, water level monitoring, gas monitoring, and temperature and humidity monitoring. It is applicable to municipal, telecommunications, gas and other occasions to realize digital management of manhole covers. A power module can also be set in the receiving cavity; the monitoring terminal includes a monitoring module and a communication module; the NFC rotary lock is an existing product, which integrates an NFC module and an unlocking module. Its principle will not be described in detail.

[0069] like Figures 16 to 19 As shown, in one embodiment of this utility model, a monitoring terminal is provided on the well base 1. The monitoring terminal includes a monitoring module and a communication module. The monitoring terminal and the locking mechanism 16 utilize NB-IoT to connect to an IoT cloud service monitoring platform, a handheld terminal, or a mobile APP. The locking mechanism 16 is equipped with a WIFI module for data transmission. Both the monitoring terminal and the NFC rotary lock communicate with an external cloud platform (specifically, the cloud platform's control module), and the power module supplies power to both the monitoring terminal and the NFC rotary lock. The monitoring terminal includes a monitoring module and a communication module; the NFC rotary lock has an NFC module (e.g., Figure 16 (as shown) and unlocking module (as shown) Figure 17 (As shown). The monitoring terminal and NFC rotary lock utilize NB-IoT to connect to an IoT cloud service monitoring platform, handheld terminal, or mobile APP. In this embodiment, the communication module is a SIM7020C module (e.g., Figure 18 As shown), both the control module and the monitoring module use the Allwinner V853 chip. NB-IoT itself does not require rebuilding the network; the radio frequency and antenna can be reused. Network communication via NB-IoT base stations is existing technology, and its technical principles will not be detailed here. The locking mechanism 16 has a built-in WIFI module (such as...). Figure 19 (As shown); the data of the locking mechanism 16 is transmitted via the WIFI module. When data needs to be transmitted or sent, the WIFI module of the locking mechanism 16 is activated through the MCU data transmission center to transmit data.

[0070] This embodiment integrates active RFID electronic tags for easy identification, tracking, and management. It reserves a cavity for intelligent devices and is equipped with a monitoring terminal to achieve real-time status monitoring and data uploading. The built-in power module ensures continuous and stable power supply. It adopts an NFC rotary lock to improve the convenience and security of unlocking and record operations. At the same time, it uses NB-IoT technology to achieve remote communication with external cloud platforms, handheld terminals, or mobile APPs, thereby improving the overall efficiency, reliability, and intelligence level of manhole cover management.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel power manhole cover with a security lock, characterized in that, The well base (1), outer cover (2) and inner cover (3) are included. The inner cover (3) is detachably connected to the inside of the well base (1), and the outer cover (2) is detachably connected to the top of the well base (1). The top of the well base (1) is provided with an embedding groove (4) for embedding the outer cover (2). The inner edge of the embedding groove (4) is provided with a locking groove (5). The edge of the outer cover (2) is provided with a locking protrusion (6) that matches the locking groove (5). After the locking protrusion (6) is embedded in the locking groove (5), it is locked by a locking assembly (7).

2. The novel power manhole cover with security lock according to claim 1, characterized in that, The part of the outer cover (2) embedded in the well base (1) has a structure that is wider at the top and narrower at the bottom, and the bottom of the outer cover (2) is provided with several reinforcing plates (8).

3. The novel power manhole cover with a security lock according to claim 1 or 2, characterized in that, The well base (1) is provided with reinforcing ribs (9) on its outer periphery.

4. The novel power manhole cover with a security lock according to claim 1 or 2, characterized in that, A mounting base (10) for fixing the locking assembly (7) is provided in the locking groove (5); The locking assembly (7) includes a locking bolt (701) and a locking nut (702). The lower end of the locking bolt (701) is fixed in the mounting base (10), and the upper end is located in the locking groove (5). A fixing groove (11) is provided on the locking protrusion (6), and a locking hole (12) is provided on the fixing groove (11). After the outer cover (2) is inserted into the embedding groove (4), the upper end of the locking bolt (701) extends out of the locking hole (12) and cooperates with the locking nut (702) in the fixing groove (11).

5. The novel power manhole cover with a security lock according to claim 4, characterized in that, The top of the fixing groove (11) is also provided with a sealing cap (13).

6. The novel power manhole cover with a security lock according to claim 1, 2 or 5, characterized in that, The well base (1) is equipped with a support block (14) for supporting the inner cover (3).

7. The novel power manhole cover with security lock according to claim 6, characterized in that, A snap-fit ​​block (15) is provided below the bearing block (14), and a locking mechanism (16) is provided on the inner cover (3); the locking mechanism (16) includes a locking tongue (17), which is embedded in the area between the bearing block (14) and the snap-fit ​​block (15) to lock the inner cover (3) in the well seat (1).

8. The novel power well cover with a security lock according to claim 1, 2, 5 or 7, characterized in that, The inner wall of the well base (1) is movably connected to a limiting member (18); the limiting member (18) is embedded in the inner wall of the well base (1) when the inner cover (3) is installed, and pops out and is stuck above the inner cover (3) after the inner cover (3) is placed.

9. The novel power well cover with a security lock according to claim 1, 2, 5 or 7, characterized in that, The well base (1) is equipped with a monitoring terminal, which includes a monitoring module and a communication module; the monitoring terminal and the locking mechanism (16) utilize NB-IoT to connect to the Internet of Things cloud service monitoring platform, handheld terminal or mobile APP; the locking mechanism (16) is equipped with a WIFI module for data transmission.

10. The novel power well cover with a security lock according to claim 1, 2, 5 or 7, characterized in that, An RFID electronic tag is also installed on the outer cover (2).

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