Electric power well lid and protection method

Abstract

The invention discloses an electric power well lid and a protection method. The electric power well lid comprises a base and a well lid body. A channel is formed in the base, and the well lid body is rotationally connected with the base and opens and closes the channel. A detection assembly is arranged on the base and / or the well lid body and at least detects the opening and closing state of the well lid body and conducts identity recognition. A plurality of protection units are rotationally arranged on the base, and when the multiple protection units rotate to the plane where the base is located, a shielding structure for limiting passing of the channel is formed; the protection unit is rotationally switched between the plane where the base is located and the space above and below the plane according to the identity recognition normal result and the opening and closing state of the well lid body, and rotationally switched between the plane where the base is located and the space above the plane according to the identity recognition abnormal result and the opening and closing state of the well lid body. And protection can be carried out after the electric well lid is opened, and unauthorized personnel are prevented from entering the well.

Description

Technical Field

[0001] The present invention belongs to the technical field of power well channel control, and in particular relates to a power well cover and a protection method. Background Art

[0002] The power well gathers different power lines into one place through the arrangement of cable trenches and cable troughs to form a power well, which is convenient for the connection and intersection of the lines. The power well connects different power facilities, such as substations, transmission lines and distribution lines, and plays the role of connecting power facilities and transmitting electric energy. The power well serves as an inspection and maintenance point for power facilities, providing convenient inspection and maintenance space for power workers. The manhole cover of the power well is an important control device for the entrance and exit of the power well, which can protect the facilities in the well and prevent people or animals from entering.

[0003] Patent application CN209468786U discloses an electric manhole cover, comprising a cover plate and a plate slot rotatably connected to the cover plate, the cover plate and the plate slot being connected by an anti-theft component, the anti-theft component comprising a connecting block welded to the bottom of the cover plate, a connecting slot located on the side of the plate slot rotatably connected to the connecting block, the connecting block conflicts with the sliding component, the sliding component comprises a sliding slot running through the side of the plate slot, a sliding block located in the sliding slot and slidably connected to the sliding slot, the left side of the anti-theft component conflicts with the elastic component, the elastic component comprises a left baffle and a right baffle fixed in parallel to the lower part of the clamping ring in the sliding slot, a spring plate slidable between the left baffle and the right baffle, and a spring between the spring plate and the left baffle. However, during use, the electric manhole cover cannot be discovered in time after being forcibly opened by unauthorized personnel, resulting in the manhole cover being in an open state for a long time, which will cause serious safety hazards to the power facilities inside the power well.

[0004] In addition, when the manhole cover is opened by unauthorized personnel, it is impossible to prevent the unauthorized personnel from taking further actions in time, which may easily cause serious accidents. In addition, in the prior art, after the power manhole cover is opened, the manhole mouth will be in an open state, and it is difficult for passers-by to discover it in time, which may easily cause traffic accidents.

[0005] Therefore, how to provide a structure that can protect against unauthorized personnel opening the manhole cover is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] In view of the defects existing in the above-mentioned prior art, the present invention provides a power manhole cover and a protection method, which can be used for protection after the power manhole cover is opened to prevent unauthorized persons from entering the manhole.

[0007] In a first aspect, the present invention provides an electric manhole cover, comprising a base and a manhole cover body;

[0008] A passage is provided in the base, and the manhole cover body is rotatably connected to the base and opens and closes the passage;

[0009] A detection component is provided on the base and / or the manhole cover body, and the detection component at least detects the open and closed state of the manhole cover body and performs identity recognition;

[0010] A plurality of protection units are rotatably provided on the base. When the plurality of protection units rotate to the plane where the base is located, a shielding structure that restricts passage is formed. The protection units rotate and switch between the plane where the base is located and the spaces above and below the plane according to normal identity recognition results and the opening and closing status of the manhole cover body, and rotate and switch between the plane where the base is located and the space above the plane according to abnormal identity recognition results and the opening and closing status of the manhole cover body.

[0011] Furthermore, an annular seat is provided on the base, a support ring is provided inside the annular seat, and the support ring and the annular seat form a limiting structure for limiting the manhole cover body;

[0012] A rotating fixing piece is arranged on the manhole cover body, and a fixing hole which cooperates with the rotating fixing piece and is fixed to the annular bottom plate located inside the annular seat.

[0013] Furthermore, the protection unit includes a driving member, a rack and a protection plate. The driving member is fixed on the base, the rack is fixed to the driving end of the driving member, and one end of the protection plate is rotatably fixed to the base and is fixedly provided with a gear meshing with the rack.

[0014] Furthermore, the rotation plane of at least one protective plate is parallel to the rotation plane of the manhole cover body, a positioning groove is provided on the protective plate whose rotation plane is parallel to the rotation plane of the manhole cover body, and a support rod that matches and abuts against the positioning groove is provided on the manhole cover body.

[0015] Furthermore, the distance from the support rod to the rotational connection position between the manhole cover body and the base is smaller than the radius of the manhole cover body.

[0016] Furthermore, the detection component includes a pressure sensor and an inclination sensor for detecting the inclination angle of the manhole cover body. The inclination sensors are fixed on the manhole cover body. The pressure sensor is elastically fixed on at least one protective plate. A pressure block that cooperates with the pressure sensor is provided at one end of the support rod away from the manhole cover body, and when the manhole cover body is located in the plane where the base is located, the pressure block is pressed against the pressure sensor.

[0017] Furthermore, the pressure sensor is arranged on the protective plate through an elastic mechanism, and the elastic mechanism includes a guide hole, a guide rod and an elastic member. The guide hole is located on the protective plate, the diameter of one end of the guide rod is larger than the diameter of the guide hole, and the other end passes through the guide hole and is fixed to the pressure sensor. The elastic member is sleeved on the guide rod, and the elastic member and the pressure sensor are located on the same side of the protective plate.

[0018] Furthermore, the detection component includes an RFID reader / writer module for identity recognition, and the RFID reader / writer module is fixed to the manhole cover body;

[0019] The electric manhole cover also includes a controller connected to the RFID reading and writing module, the pressure sensor and the tilt sensor signal. The controller controls the rotation of multiple protection units according to the detection and identification results of the RFID reading and writing module, the pressure sensor and the tilt sensor.

[0020] Furthermore, according to the detection and identification results of the RFID reading and writing module, the pressure sensor and the tilt sensor, the rotation of the plurality of protection units is controlled, including:

[0021] Determine the open or closed state of the manhole cover body according to the detection results of the pressure sensor and the tilt sensor;

[0022] When it is determined that the manhole cover body is in an open state, an identity recognition result of the RFID reading and writing module is obtained;

[0023] When the RFID reading and writing module recognizes the identity normally, the plurality of protection units are controlled to rotate to a vertical state toward a side away from the manhole cover body;

[0024] After a person enters through the passage for a first predetermined time, the plurality of protection units are controlled to rotate toward a side close to the manhole cover body to a vertical state;

[0025] After the person returns through the passage for a second predetermined time, the plurality of protection units are controlled to rotate to the plane where the base is located.

[0026] Furthermore, according to the detection and identification results of the RFID reading and writing module, the pressure sensor and the tilt sensor, the rotation of the plurality of protection units is controlled, and the method further includes:

[0027] When the RFID reader / writer module recognizes an abnormality in the identity, the plurality of protection units are controlled to rotate toward the side close to the manhole cover body to a preset tilted position; wherein the preset tilted position is a position where the protection unit rotates 30°;

[0028] When the RFID reading and writing module recognizes the identity normally and / or the controller receives a reset instruction, the plurality of protection units are controlled to rotate to the plane where the base is located.

[0029] In a second aspect, the present invention further provides a protection method, using the above-mentioned power manhole cover, the protection method comprises:

[0030] The detection component detects that the manhole cover body is open and the identity recognition is normal, and the multiple protection units rotate from the plane where the base is located to the first preset position, the second preset position in sequence, and finally rotate to the plane where the base is located, and rotate the manhole cover body until the passage is closed; the second preset position and the first preset position are respectively located on the upper and lower sides of the plane where the base is located;

[0031] The detection component detects that the manhole cover body is open and the identity recognition is abnormal, and multiple protection units rotate from the plane where the base is located to the third preset position, and finally rotate to the plane where the base is located.

[0032] Furthermore, when the detection component detects that the manhole cover body is opened and the identity recognition is normal, it includes:

[0033] The plurality of protection units rotate from the plane where the base is located toward a side away from the manhole cover body to a first preset position;

[0034] After the first condition is met, the plurality of protection units rotate from the first preset position toward the side close to the manhole cover body to the second preset position;

[0035] After the second condition is met, the plurality of protection units rotate from the second preset position to the plane where the base is located, and the manhole cover body is rotated until the passage is closed.

[0036] Furthermore, the first preset position is that the manhole cover body is vertically downward or there is a certain angle between the manhole cover body and the plane where the base is located, and the second preset position is that the manhole cover body is vertically upward or there is a certain angle between the manhole cover body and the plane where the base is located. The first condition is that a person enters through the passage for a first predetermined time, and the second condition is that a person returns through the passage for a second predetermined time.

[0037] Furthermore, when the detection component detects that the manhole cover body is opened and the identity recognition is abnormal, it includes:

[0038] The plurality of protection units rotate from the plane where the base is located to a third preset position;

[0039] After the third condition is met, the plurality of protection units rotate from the third preset position to the plane where the base is located.

[0040] Furthermore, the third preset position is a certain angle between the manhole cover body and the plane where the base is located, and the angle between the third preset position and the plane where the base is located is smaller than the angle between the first position and the second position and the plane where the base is located; the third condition is identity recognition abnormality and / or receipt of a recovery command.

[0041] The present invention provides a power manhole cover and a protection method, which at least have the following beneficial effects:

[0042] (1) Through the cooperation of the detection component and the protection unit, when the electric manhole cover is opened (the manhole cover body is opened), the protection unit can be rotated to the upper space of the plane where the base is located on the same side as the manhole cover body, so as to protect the passage and prevent unauthorized personnel from entering. At the same time, after the authorized personnel enter the electric manhole through the passage, the passage can also be protected to prevent pedestrians and vehicles from approaching.

[0043] (2) When a worker needs to enter the well, the worker will identify himself by reading the identity information of the electronic tag matching his identity through the RFID reader / writer module. After verifying that the worker is an authorized person, the controller sends a command to control the drive component to move the protective plate to a vertical downward position. Conversely, when the worker is identified as an unauthorized person, each protective plate will be adjusted to an upward tilted and raised position to prevent unauthorized persons from entering the well.

[0044] (3) When authorized personnel enter the power well, the well cover is opened by lifting one side of the well cover body. Then, the driving parts are extended to drive the protective plate to rotate vertically downward through the meshing of the rack and the gear, so that the inner channel of the base is opened and the well mouth is opened at the same time.

[0045] (4) After the wellhead passage is opened, the wellhead cover body is vertical, and each driving member drives each protective plate to rotate upward to a vertical position using a rack and a gear, so that the wellhead can be shielded and protected to prevent pedestrians and vehicles from approaching.

[0046] (5) When personnel identification fails and the manhole cover body is still opened, by controlling each driving member to make each protective plate rotate upward, each protective plate on the circumference of the base is arched upward, which can prevent unauthorized personnel from crossing the protective plate and entering the manhole, thereby realizing the control of the power manhole passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of the structure of a power manhole cover provided by the present invention;

[0048] Figure 2 A schematic diagram of the structure of a power manhole cover provided by an embodiment of the present invention from another angle;

[0049] Figure 3 A cross-sectional view of a power manhole cover provided by an embodiment of the present invention;

[0050] Figure 4 A schematic diagram of the structure of an enlarged portion A of a power manhole cover provided by an embodiment of the present invention;

[0051] Figure 5 A schematic diagram of the structure of a power manhole cover B enlarged according to an embodiment of the present invention;

[0052] Figure 6 A schematic diagram of the structure of the bottom of a power manhole cover provided by an embodiment of the present invention;

[0053] Figure 7 This is a schematic diagram of the enlarged structure of the power manhole cover C provided in one embodiment of the present invention.

[0054] Explanation of the accompanying drawings: 1. Base; 101. Angle seat; 102. Support ring; 103. Channel; 2. Manhole cover body; 201. RFID reading and writing module; 202. Sealing cover; 203. Tilt sensor; 204. Edge computing module; 3. Limiting unit; 301. Cylindrical seat; 302. Fixing rod; 303. Limiting block; 304. Limiting groove; 305. Hexagonal groove; 4. Protection unit; 401. Mounting groove; 402. Protection plate; 403. Gear; 404. Rack; 405. Driving member; 5. Monitoring unit; 501. Guide hole; 502. Guide rod; 503. Pressure sensor; 504. Limiting spring; 505. Support rod; 506. Pressure block; 507. Positioning groove. DETAILED DESCRIPTION

[0055] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0057] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0058] like Figure 1As shown, the present invention provides an electric manhole cover, characterized in that it includes a base 1 and a manhole cover body 2; a channel 103 is provided in the base 1, the manhole cover body 2 is rotatably connected to the base 1, and the channel 103 is opened and closed; a detection component is provided on the base 1 and / or the manhole cover body 2, and the detection component at least detects the opening and closing state of the manhole cover body 2; a plurality of protection units are provided on the base 1, and the protection units rotate and switch between the plane where the base 1 is located and the space above and below the plane according to the opening and closing state of the manhole cover body 2, and when the plurality of protection units rotate to the plane where the base 1 is located, a shielding structure that restricts the passage through the channel 103 is formed. Wherein, the channel 103 is the hollow area inside when the base 1 is not provided with a protection unit.

[0059] In actual application scenarios, such as Figures 1 to 7 As shown, the electric manhole cover may include a base 1 and a manhole cover body 2, one side of the manhole cover body 2 is movably connected to the base 1 through a movable seat, the movable seat is composed of two mutually hinged connecting seats, the two connecting seats are respectively fixedly connected to the base 1 and the manhole cover body 2, the manhole cover body 2 and the outside of the base 1 are preferably movably connected in the form of a hinge, an annular seat 101 is provided on the top of the base 1, the manhole cover body 2 and the annular seat 101 correspond to each other, when the manhole cover body 2 is in a horizontal state, the circumferential surface of the manhole cover body 2 is matched with the inner circumferential surface of the annular seat 101, and a support ring 102 is provided on the inner bottom of the annular seat 101 for supporting the bottom of the manhole cover body 2.

[0060] A limiting unit 3 is provided on the manhole cover body 2 and the support ring 102, and the limiting unit 3 is used to realize the connection and positioning between the manhole cover body 2 and the support ring 102. A protective unit 4 is provided on the inner side of the support ring 102, and the protective unit 4 is used to control the channel 103 in the middle of the support ring 102.

[0061] like Figure 1 , Figure 4 and Figure 7As shown, the limiting unit 3 includes a cylindrical seat 301, which is rotatably connected to the edge of the manhole cover body 2, and the cylindrical seat 301 passes through the bottom surface of the manhole cover body 2. The top of the cylindrical seat 301 is provided with a hexagonal groove 305, and the hexagonal groove 305 is convenient for using a hexagonal tool to rotate the cylindrical seat 301 to drive the limiting block 303 to rotate. The bottom end of the cylindrical seat 301 is provided with a limiting block 303 through a fixing rod 302, and the middle part of the limiting block 303 is fixedly connected to the end of the fixing rod 302. The surface of the support ring 102 A limiting groove 304 corresponding to the limiting block 303 is provided throughout, and both the limiting block 303 and the limiting groove 304 are long strip structures. The limiting groove 304 is larger than the size of the limiting block 303. The limiting block 303 and the limiting groove 304 are positioned correspondingly by rotating the limiting block 303. When the manhole cover body 2 is placed horizontally, the limiting block 303 passes through the limiting groove 304, and the limiting block 303 is rotated so that the limiting block 303 and the limiting groove 304 intersect, thereby realizing the connection limit between the manhole cover body 2 and the support ring 102.

[0062] like Figure 3 and Figure 4 As shown, the protection unit 4 includes a mounting groove 401, and the mounting grooves 401 are evenly spaced on the inner side of the support ring 102 / base 1. The interior of the mounting groove 401 is rotatably connected to a protection plate 402 through a pin shaft. The protection plate 402 is made of carbon fiber material to prevent rust and corrosion and extend the service life. One end of the protection plate 402 located in the mounting groove 401 is provided with a gear 403, and the gear 403 is concentric with the pin shaft. A rack 404 is meshed on the outer side of the gear 403, and a driving member 405 is provided at the bottom of the rack 404. The fixed end of the driving member 405 is arranged at the bottom of the support ring 102 / or the base 1 through a support, and the rack 404 is driven to move up and down by the extension and retraction of the driving member 405. The rack 404 drives the gear 403 to rotate and drives the protection plate 402 to rotate, so as to adjust the angle state of the protection plate 402.

[0063] like Figure 6As shown, the detection component may include an RFID reading and writing module 201, a tilt sensor 203 and a pressure sensor 503, and the electric manhole cover also includes an edge computing module 204 and a controller. The RFID reading and writing module 201 is embedded in a groove opened on one side of the manhole cover body 2, and a sealing cover 202 is movably provided at one end of the groove for sealing and protecting the RFID reading and writing module 201. The tilt sensor 203 is arranged in the middle of the bottom side of the manhole cover body 2, and the edge computing module 204 and the controller are both arranged at the bottom of the manhole cover body 2. The RFID reading and writing module 201 identifies the electronic tag of the staff to determine the identity information of the staff. The tilt sensor 203 is used to monitor the tilt angle of the manhole cover body 2, and when the manhole cover body 2 is in a normal state, the angle value of the manhole cover body 2 detected by the tilt sensor 203 is within the normal angle threshold range, and the edge computing module 204 is used to receive each sensor (R The RFID reader / writer module 201 reads and writes the data monitored by the RFID reader / writer module 201, the pressure sensor and the inclination sensor and analyzes and processes the data. In addition, when the RFID reader / writer module 201 recognizes the identity information of the electronic tag, it reads the data in the electronic tag and transmits the data to the edge computing module 204 through the communication interface. After receiving the data from the RFID reader / writer module 201, the edge computing module 204 performs real-time processing and analysis to verify the authenticity and validity of the identity information. Based on the processed data, the edge computing module 204 makes corresponding decisions and feeds back to the external master station. If the identity recognition is successful (that is, the identity recognition is normal), the information is fed back to the external master station. The external master station sends an instruction to the controller to control the protection unit 4 to allow entry into the power shaft. If the recognition fails or an abnormality is found, an alarm is sent to the external master station to warn, and an instruction is sent to the controller to control the protection unit 4 to prevent unauthorized personnel from entering the power shaft.

[0064] like Figure 3 and Figure 5 As shown, the electric manhole cover also includes a monitoring unit 5, which is arranged between the bottom of the manhole cover body 2 and the protection unit 4. The monitoring unit 5 includes a guide hole 501, a guide rod 502, a limit spring 504, a support rod 505, a pressure block 506 and a positioning groove 507. The guide hole 501 is opened on the surface of the protection plate 402 corresponding to the movable seat. The guide rod 502 is slidably matched inside the guide hole 501. The top of the guide rod 502 is provided with a pressure sensor 503. The limit spring 504 is sleeved outside the guide rod 502. 04. A support rod 505 is provided at the bottom of the manhole cover body 2, and the support rod 505 corresponds to the positioning groove 507. A pressure block 506 corresponding to the pressure sensor 503 is provided at the bottom of the support rod 505. After the manhole cover body 2 is fully matched with the annular seat 101, the pressure block 506 is pressed onto the pressure sensor 503, the guide rod 502 is squeezed downward, and the limit spring 504 is compressed. When the manhole cover body 2 is in a normal state, the pressure value of the pressure sensor 503 is within the normal first pressure threshold range.

[0065] A positioning groove 507 is provided at the end of the protective plate 402 corresponding to the movable seat. When the protective plate 402 is adjusted to be vertically upward and inclined to one side of the manhole cover body 2, the positioning groove 507 cooperates with the support rod 505 to support and limit the manhole cover body 2 to prevent the manhole cover body 2 from falling back and affecting the staff from entering and exiting the power well.

[0066] It should be noted that the driving part 405 can be an electric telescopic rod or an electromagnetic telescopic mechanism, and both are low-power models. The driving part 405, the inclination sensor 203, the pressure sensor 503, the edge computing module 204, the controller and the RFID reading and writing module 201 and other low-power components are powered by a built-in battery module on the manhole cover body 2. In actual use, the frequency of staff entering the power well to work is low, and the battery power will not be consumed quickly. The battery can be replaced after it is used up, and it can also be connected to the municipal power grid for power supply when power conditions permit.

[0067] When in use, when a worker needs to enter the power well for construction work, he first opens the sealing cover 202, and uses the electronic tag he carries with him to approach the RFID reading and writing module 201 for identity recognition, and sends the recognized identity data to the edge computing module 204 for analysis and processing to verify the identity information. After the identity authentication is successful, it is fed back to the external main station, and the main station sends instructions to the controller to control each driving member 405 to extend, and at the same time, the rack 404 moves upward and drives each protective plate 402 to move downward through the gear 403, so that each The protective plate 402 is rotated downward to a vertical state to open the inner channel 103 of the support ring 102. At the same time, the staff who have successfully identified their identity use the hexagonal tool to cooperate with the hexagonal groove 305 and rotate the cylindrical seat 301, and drive the limit block 303 to rotate through the fixed rod 302, so that the limit block 303 is rotated to correspond to the position of the limit groove 304, and the manhole cover body 2 can be lifted to a vertical state to open the wellhead of the power well. The staff can enter the power well through the inner channel 103 of the support ring 102 to carry out construction work.

[0068] However, after the staff enters the power well, the manhole cover body 2 is in a downward vertical state, and the wellhead is in an open state for a long time, which will cause safety hazards to pedestrians and vehicles passing by. Therefore, by setting a human body sensor in the well, after the human body sensor detects that the staff has entered the well, it can immediately or after a first predetermined time to feedback data to the edge computing module 204 for analysis and processing, and the analyzed and processed data is fed back to the main station. The main station sends instructions to the controller to control the contraction of each driving member 405, and drives each protective plate 402 to rotate upward through the meshing of the rack 404 and the gear 403, so that each protective plate 402 is in a vertical upward state, and each protective plate 402 in a vertical state can be used to protect the surroundings of the wellhead to prevent pedestrians and vehicles from approaching the wellhead. In addition, the data of the present invention can be fed back to the controller at the same time as it is fed back to the main station, and the controller controls the protection unit 4 according to the pre-set judgment conditions.

[0069] It is worth noting that since the manhole cover body 2 is in a vertical state and the support rod 505 is in a horizontal state at this time, after each protective plate 402 is rotated to a vertical state, a positioning groove 507 at the end of a protective plate 402 corresponding to the support rod 505 just cooperates with the support rod 505 and provides support for the support rod 505 to prevent the manhole cover body 2 from falling back.

[0070] When the staff needs to return from the power shaft to the outside, after the human body sensor detects the staff again, the data is fed back to the edge computing module 204 for analysis and processing, and the analyzed and processed data is fed back to the main station. The main station sends instructions to the controller to control the extension of each driving member 405, the upward movement of the rack 404 and the downward movement of each protective plate 402 through the gear 403, so that each protective plate 402 finally rotates downward to a vertical state, and the inner channel 103 of the support ring 102 can be opened. At this time, the staff can return from the inside of the power shaft to the outside of the power shaft.

[0071] When the staff returns from inside the power shaft to outside the power shaft, they can use the electronic tag they carry with them to approach the RFID reading and writing module 201 for identity recognition, or they can return again after a second predetermined time, and the main station sends instructions to the controller to control the contraction of each driving member 405, and drive each protective plate 402 to rotate upward through the engagement of the rack 404 and the gear 403, so that each protective plate 402 is finally located in the plane where the base 1 is located, that is, it reaches the initial state before the staff enters the power shaft.

[0072] In addition, when the identity of the person is not successfully identified (i.e., the identity recognition is abnormal), the manhole cover body 2 is still opened, and the pressure block 506 gradually moves away from the pressure sensor 503. At the same time, the force on the pressure sensor 503 gradually decreases. In addition, the inclination sensor 203 monitors that the angle of the manhole cover body 2 gradually increases. When the pressure sensor 503 detects that the pressure value it is subjected to is less than the set first pressure threshold and the inclination sensor 203 detects that the angle value of the manhole cover body 2 is greater than the set angle threshold, the pressure sensor 503 and the inclination sensor 203 send the detected information data to the edge computing module. 204 performs analysis and processing, and determines that the manhole cover body 2 is in an open state. The edge computing module 204 sends the analyzed and processed data to the main station for alarm. At the same time, the main station sends instructions to the controller. The controller controls each driving member 405 to contract and drive the gear 403 to rotate, so that each protective plate 402 rotates upward, and the rotation angle is 30°, so that each protective plate 402 is in an upward arched state as a whole, and an electromagnetic locking mechanism is set on the support ring 102. The electromagnetic locking mechanism is controlled by the controller to lock the protective plate 402 to prevent unauthorized personnel from entering the power well. The electromagnetic locking mechanism may include an electromagnetic relay, a telescopic member and a toothed plate. The rack 404 is provided with a sawtooth meshing with the toothed plate on the side away from the gear 403. The controller controls the switch of the electromagnetic relay to realize the telescopic member driving the toothed plate to be telescopic. The telescopic direction of the telescopic member is parallel to the pin shaft of the gear 403. When the electromagnetic relay is turned on and started, the telescopic member extends out, and the toothed plate meshes with the rack 404 to fix it. When the electromagnetic relay is disconnected and closed, the telescopic member is retracted, and the toothed plate and the rack 404 change from a meshing state to a non-interference state. At this time, the rack 404 can move freely up and down.

[0073] When the identity of the person is not successfully identified and the protective plates 402 are in an upwardly arched state as a whole, the controller can retract the protective plates 402 within the plane where the base 101 is located after the identity of the person is successfully identified through the RFID reading and writing module 201, and the manhole cover body 2 can be closed at this time; or when the manhole cover body 2 is lost or damaged, the main station sends a reset command to the controller to control the protective plates 402 to retract within the plane where the base 101 is located, and finally the manhole cover body 2 can be closed after replacement or repair.

[0074] Due to the long-term use of the manhole cover body 2, the fit between the manhole cover body 2 and the annular seat 101 will become loose, resulting in a large gap and affecting the sealing of the manhole cover body 2, but the inclination sensor 203 cannot detect it. Therefore, it is necessary to judge the pressure value of the pressure sensor 503 by detecting the pressure block 506. By setting a second pressure threshold, and the second pressure threshold is less than the first pressure threshold, when the manhole cover body 2 is loose, the manhole cover body 2 has a certain activity space, resulting in the pressure value of the pressure sensor 503 by the pressure block 506 decreasing. When the inclination of the manhole cover body 2 detected by the inclination sensor 203 is within the unopened range, and the pressure value of the pressure sensor 503 is less than the set second pressure threshold, the pressure sensor 503 feeds back the detected data information to the edge computing module 204 for analysis and processing, and then it is judged that the manhole cover body 2 is in a loose state. The edge computing module 204 transmits the processed data to the main station for alarm to remind the staff to repair it in time.

[0075] The present invention also provides a protection method, using the above-mentioned power manhole cover, the protection method may include:

[0076] The detection component detects that the manhole cover body is open and the identity recognition is normal, and the multiple protection units rotate from the plane where the base is located to the first preset position, the second preset position in sequence, and finally rotate to the plane where the base is located, and rotate the manhole cover body until the passage is closed; the second preset position and the first preset position are respectively located on the upper and lower sides of the plane where the base is located;

[0077] The detection component detects that the manhole cover body is open and the identity recognition is abnormal, and multiple protection units rotate from the plane where the base is located to the third preset position, and finally rotate to the plane where the base is located.

[0078] When the detection component detects that the manhole cover body is opened and the identity recognition is normal, it includes:

[0079] The plurality of protection units rotate from the plane where the base is located toward a side away from the manhole cover body to a first preset position;

[0080] After the first condition is met, the plurality of protection units rotate from the first preset position toward the side close to the manhole cover body to the second preset position;

[0081] After the second condition is met, the plurality of protection units rotate from the second preset position to the plane where the base is located, and the manhole cover body is rotated until the passage is closed.

[0082] When the detection component detects that the manhole cover is open and the identification is abnormal, it includes:

[0083] The plurality of protection units rotate from the plane where the base is located to a third preset position;

[0084] After the third condition is met, the plurality of protection units rotate from the third preset position to the plane where the base is located.

[0085] Among them, the first preset position is that the manhole cover body is vertically downward or there is a certain angle between the manhole cover body and the plane where the base is located, the second preset position is that the manhole cover body is vertically upward or there is a certain angle between the manhole cover body and the plane where the base is located, the first condition is that the person enters through the passage for the first predetermined time, and the second condition is that the person returns through the passage for the second predetermined time. The angle between the first preset position and the second preset position and the plane where the base is located is at least greater than 75°. The third preset position is that there is a certain angle between the manhole cover body and the plane where the base is located, and the angle between the third preset position and the plane where the base is located is smaller than the angle between the first position and the second position and the plane where the base is located; the third condition is that the identity recognition is abnormal and / or a recovery command is received.

[0086] Although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electric manhole cover, characterized in that: Including a base and a manhole cover body; A passage is provided in the base, and the manhole cover body is rotatably connected to the base and opens and closes the passage; A detection component is provided on the base and / or the manhole cover body, and the detection component at least detects the open and closed state of the manhole cover body and performs identity recognition; A plurality of protection units are rotatably provided on the base. When the plurality of protection units rotate to the plane where the base is located, a shielding structure that restricts passage is formed. The protection units rotate and switch between the plane where the base is located and the spaces above and below the plane according to normal identity recognition results and the opening and closing status of the manhole cover body, and rotate and switch between the plane where the base is located and the space above the plane according to abnormal identity recognition results and the opening and closing status of the manhole cover body.

2. The electric manhole cover according to claim 1, characterized in that: An annular seat is provided on the base, a support ring is provided inside the annular seat, and the support ring and the annular seat form a limiting structure for limiting the manhole cover body; A rotating fixing piece is arranged on the manhole cover body, and a fixing hole which cooperates with the rotating fixing piece and is fixed to the annular bottom plate located inside the annular seat.

3. The electric manhole cover according to claim 1, characterized in that: The protection unit comprises a driving member, a rack and a protection plate. The driving member is fixed on the base, the rack is fixed to the driving end of the driving member, and one end of the protection plate is rotationally fixed to the base and is fixed with a gear meshing with the rack.

4. The electric manhole cover according to claim 3, characterized in that: The rotation plane of at least one protective plate is parallel to the rotation plane of the manhole cover body, a positioning groove is arranged on the protective plate whose rotation plane is parallel to the rotation plane of the manhole cover body, and a support rod which matches and abuts against the positioning groove is arranged on the manhole cover body.

5. The electric manhole cover according to claim 4, characterized in that: The detection component includes a pressure sensor and an inclination sensor for detecting the inclination angle of the manhole cover body. The inclination sensors are fixed on the manhole cover body. The pressure sensor is elastically fixed on at least one protective plate. A pressure block that cooperates with the pressure sensor is provided at one end of the support rod away from the manhole cover body, and when the manhole cover body is located in the plane where the base is located, the pressure block is pressed against the pressure sensor.

6. The electric manhole cover according to claim 5, characterized in that: The pressure sensor is arranged on the protective plate through an elastic mechanism. The elastic mechanism includes a guide hole, a guide rod and an elastic member. The guide hole is located on the protective plate. The diameter of one end of the guide rod is larger than the diameter of the guide hole, and the other end passes through the guide hole and is fixed to the pressure sensor. The elastic member is sleeved on the guide rod, and the elastic member and the pressure sensor are located on the same side of the protective plate.

7. The electric manhole cover according to claim 5, characterized in that: The detection component includes an RFID reader / writer module for identity recognition, and the RFID reader / writer module is fixed on the manhole cover body; The electric manhole cover also includes a controller connected to the RFID reading and writing module, the pressure sensor and the tilt sensor signal. The controller controls the rotation of multiple protection units according to the detection and identification results of the RFID reading and writing module, the pressure sensor and the tilt sensor.

8. The electric manhole cover according to claim 7, characterized in that: According to the detection and identification results of the RFID reading and writing module, the pressure sensor and the inclination sensor, the rotation of multiple protection units is controlled, including: Determine the open or closed state of the manhole cover body according to the detection results of the pressure sensor and the tilt sensor; When it is determined that the manhole cover body is in an open state, an identity recognition result of the RFID reading and writing module is obtained; When the RFID reading and writing module recognizes the identity normally, the plurality of protection units are controlled to rotate to a vertical state toward a side away from the manhole cover body; After a person enters through the passage for a first predetermined time, the plurality of protection units are controlled to rotate toward a side close to the manhole cover body to a vertical state; After the person returns through the passage for a second predetermined time, the plurality of protection units are controlled to rotate to the plane where the base is located.

9. The electric manhole cover according to claim 8, characterized in that: According to the detection and identification results of the RFID reading and writing module, the pressure sensor and the inclination sensor, the rotation of the multiple protection units is controlled, and the method also includes: When the RFID reader / writer module recognizes an abnormality in the identity, the plurality of protection units are controlled to rotate to a preset tilted position toward a side close to the manhole cover body; When the RFID reading and writing module recognizes the identity normally and / or the controller receives a reset instruction, the plurality of protection units are controlled to rotate to the plane where the base is located.

10. A protection method, characterized in that: Using the power manhole cover as described in any one of claims 1 to 9, the protection method includes: The detection component detects that the manhole cover body is open and the identity recognition is normal, and the multiple protection units rotate from the plane where the base is located to the first preset position, the second preset position in sequence, and finally rotate to the plane where the base is located, and rotate the manhole cover body until the passage is closed; the second preset position and the first preset position are respectively located on the upper and lower sides of the plane where the base is located; The detection component detects that the manhole cover body is open and the identity recognition is abnormal, and multiple protection units rotate from the plane where the base is located to the third preset position, and finally rotate to the plane where the base is located.

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