An intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up

Abstract

The present invention relates to a safety manhole cover for intelligent pressure relief and explosion suppression to prevent the manhole cover from flying up, which includes a manhole frame and a manhole seat. A lower flange portion is provided at the bottom of the manhole frame, and an installation groove is provided on the manhole seat. A cover plate, a flow blocking plate, and a base plate are sequentially installed in the manhole seat from top to bottom. A plurality of connecting columns are spacedly provided on the inner side surface of the manhole frame, and the connecting columns are fixedly connected to the cover plate. A convex portion is provided on the outer side surface of the cover plate, an inner groove body is provided on the inner side surface of the manhole seat, and an extending portion extending downward is provided on the bottom surface of the manhole seat. A plurality of first exhaust ports and a plurality of second exhaust ports are distributed on the top surface of the cover plate. A pressure relief cavity and a plurality of pressure relief channels are provided inside the cover plate. A first pressure relief component is provided in the pressure relief cavity, and a second pressure relief component is provided in the pressure relief channels. A blast-proof isolation net is installed at the bottom of the base plate. The invention also includes a controller and a data acquisition module. The present invention can exhaust and relieve pressure intelligently and flexibly, can effectively suppress explosion, prevent the manhole cover from flying up, and has high safety.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers, and particularly relates to a safety manhole cover with intelligent pressure relief, explosion suppression and prevention of manhole cover flying up. Background Art

[0002] In the fields of water conservancy, electricity, petrochemical, etc., independent wells are usually set up to form isolation channels, such as foundation pits, electric wells, petrochemical wells, etc. In the foundation pit, there will be flammable and explosive odors generated by anaerobic bacteria, which are prone to explosion when the temperature rises. The electric well is usually a reserved channel for electrical equipment such as cables and wires. The electric well needs to be closed for management. The short circuit of the electrical equipment inside the electric well will cause arc ignition and result in combustion and explosion phenomena. The frequent explosion accidents in petrochemical wells are due to the narrow terrain structure inside the well. The air pressure generated by the explosion will act on the manhole cover. When the pressure inside the well is too high, it is easy to lift the manhole cover or even bounce the manhole cover off, posing a safety hazard and seriously threatening the safety of the nearby area.

[0003] The existing manhole cover pressure relief methods are single, difficult to effectively suppress explosion, the manhole cover is easy to fly up, and its safety is low. For example, the safety manhole cover disclosed in Patent No. CN111456095A automatically monitors the pressure inside the well through the set intelligent pressure relief device and automatically relieves the pressure to prevent the pressure inside the well from being too high. By setting the explosion-proof device, it can discharge the pressure during an explosion to prevent the manhole cover from bouncing off and improve safety. However, its pressure relief ability is low, the pressure relief is not flexible, and the too-high air pressure inside the well is difficult to be discharged in time, making it difficult to achieve effective pressure relief and explosion suppression. Another example is a manhole cover with a pressure relief function disclosed in Patent No. CN108999214B, which includes a well ring and a cover plate covering the well ring. A number of pressure relief holes are evenly opened on the cover plate with the center of the cover plate as the center of the circle. A pressure relief block is slidably connected in the vertical direction in each pressure relief hole. The bottom surface of the pressure relief block is provided with a main pressure discharge hole, and a number of air discharge holes communicating with the main pressure discharge hole are provided on the peripheral surface of the pressure relief block, and the air discharge holes are inclined upward; when the air pressure inside the well is stable, the upper surface of the pressure relief block is flush with the upper surface of the cover plate; when the air pressure inside the well is too high, the pressure relief block moves vertically upward along the inner wall of the pressure relief hole, so that the gas inside and outside the well is communicated through the air discharge holes and the main pressure discharge hole. It conducts passive pressure relief, with low intelligence, and it is difficult to exhaust and relieve pressure in time through the pressure relief holes under the action of too-high air pressure, and the explosion suppression ability is insufficient, and the manhole cover is easy to be lifted by the air pressure acting force, with low safety. Summary of the Invention

[0004] To solve the problems raised in the above background art, the present invention provides a safety manhole cover with intelligent pressure relief, explosion suppression and prevention of manhole cover flying up, which can exhaust and relieve pressure intelligently and flexibly, effectively suppress explosion, prevent the manhole cover from flying up, and has high safety.

[0005] The present invention provides the following technical solutions:

[0006] An intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up, comprising a manhole frame and a manhole seat. A lower flange portion is provided at the bottom of the manhole frame, and an installation groove is provided on the manhole seat. The lower flange portion is inserted into the installation groove, and the manhole seat is wrapped inside the manhole frame. The manhole seat is a cylindrical hollow cavity, and a cover plate, a flow blocking plate and a base plate are sequentially installed in the manhole seat from top to bottom. A plurality of connecting columns are spaced on the inner side surface of the manhole frame, and the connecting columns are fixedly connected to the cover plate. A convex portion is provided on the outer side surface of the cover plate, and an inner groove body matching the convex portion is provided on the inner side surface of the manhole seat. An extending portion extending downward is provided at the bottom surface of the manhole seat. A plurality of first exhaust ports and a plurality of second exhaust ports are distributed on the top surface of the cover plate. A pressure relief cavity and a plurality of pressure relief channels are provided inside the cover plate. The pressure relief cavity communicates with a plurality of the first exhaust ports, and the pressure relief channels respectively communicate with the second exhaust ports. A first pressure relief component is provided in the pressure relief cavity, and a second pressure relief component is provided in the pressure relief channel. A blast-proof isolation net is installed at the bottom of the base plate. It further includes a controller and a data acquisition module, and the controller is electrically connected to the data acquisition module. The data acquisition module includes a barometric pressure sensor and a temperature sensor.

[0007] Preferably, the first pressure relief component includes a rotating plate rotatably connected in the pressure relief cavity, a rotating shaft fixedly connected to the rotating plate, a cable fixedly connected to the end of the rotating plate far from the rotating shaft, a guide wheel, a connecting seat, a sliding connecting rod, a guide seat and a vertically arranged lead screw. A cable channel for the cable to pass through is provided inside the cover plate. The guide wheels are oppositely arranged at the inlet and outlet ends of the cable channel. An inner cavity is provided at the central position inside the cover plate. The controller is electrically connected to a motor installed at the bottom wall of the inner cavity. An angular displacement sensor is installed on the output shaft of the motor, and the angular displacement sensor is electrically connected to the data acquisition module. The end of the output shaft of the motor is connected to the lead screw. The connecting seat is sleeved outside the lead screw, and a threaded portion slidably connected to the lead screw is provided inside the connecting seat. The guide seat is arranged on the side wall of the inner cavity, and one end of the sliding connecting rod is fixedly connected to the outer side surface of the connecting seat, and the other end is slidably connected to the guide seat.

[0008] Preferably, a sleeve is wrapped outside the rotating shaft, a return spring is installed between the sleeve and the rotating shaft, and the sleeve is fixedly connected to the cover plate.

[0009] Preferably, the end of the lead screw is rotatably connected to the cover plate through a bearing.

[0010] Preferably, the second pressure relief component includes an elastic member and a piston block. The elastic member is fixedly connected to the piston block. A guide rail groove communicating with the pressure relief channel is horizontally arranged inside the cover plate, and the piston block is slidably connected to the guide rail groove.

[0011] Preferably, a pressure sensor is installed on the piston block, and the pressure sensor is electrically connected to the data acquisition module.

[0012] Preferably, a plurality of reinforcing ribs are annularly distributed on the outer side surface of the well frame.

[0013] Preferably, a chute is provided inside the well seat, the side end of the flow blocking plate is slidably connected to the chute, a flow dividing net is installed inside the flow blocking plate, a pressure-bearing elastic member is fixedly connected to the upper end surface of the flow blocking plate, the pressure-bearing elastic member is fixedly connected to the bottom surface of the cover plate, a steel wire rope is fixedly connected to the lower end surface of the flow blocking plate, a base is provided on the upper end surface of the substrate, a rope winding device for automatically collecting the steel wire rope is provided inside the base, and the steel wire rope is connected to the rope winding device.

[0014] Preferably, a memory is provided inside the controller, and the memory is used to record and store the data transmitted by the data acquisition module.

[0015] Preferably, the data acquisition module is electrically connected to the controller through an explosion-proof cable.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1): The cover plate, the flow blocking plate and the substrate are used for split flow blocking and pressure relief. The explosion-proof isolation net arranged at the bottom of the substrate is used for flame retardancy and explosion suppression, which can reduce the impact kinetic energy carried by the air pressure during explosion. The flow division of the flow blocking plate further reduces the impact kinetic energy carried by the air pressure. The cover plate cooperates with the first pressure relief component and the second pressure relief component to relieve pressure. Among them, the first pressure relief component can actively relieve pressure when the air pressure is too high or the temperature is too high. The air pressure sensor in the data acquisition module is used to monitor the air pressure at the bottom of the manhole cover in real time and feedback it to the controller. After analysis, the controller operates the first pressure relief component to actively relieve pressure, and the second pressure relief component performs passive pressure relief. The intelligent and flexible exhaust pressure relief can effectively suppress explosion and prevent the manhole cover from flying up, and its safety is high;

[0018] (2): The well frame is connected to the cover plate through the connecting column, and the lower flange part is inserted and connected to the installation groove, so that the well frame supports and fastens the well seat to prevent the deformation of the well seat. The convex part on the outer side surface of the cover plate is matched and connected with the inner groove body on the inner side surface of the well seat. The extending part extending downward from the bottom surface of the well seat is beneficial to strengthening the fastening support of the bottom area of the manhole cover to the manhole cover. The overall connection stability of the manhole cover is good, the connection strength is high, and the manhole cover can be prevented from flying up, and its safety is high;

[0019] (3): The flow blocking plate absorbs the impact kinetic energy carried by the air pressure during explosion through the arranged pressure-bearing elastic member and the steel wire rope, strengthens the safety performance of the manhole cover, and the chute in the well seat is slidably connected to the flow blocking plate to form a directional limit for the flow blocking plate, promoting the flow blocking and flow division work of the flow blocking plate. Description of the Drawings

[0020] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is Figure 1 a partial enlarged view of part A in

[0023] Figure 3 is a schematic semi-sectional view of the cover plate of the present invention;

[0024] Figure 4 is a schematic structural diagram of the inside of the casing;

[0025] Figure 5 is a schematic structural diagram of the well frame and the cover plate of the present invention;

[0026] Figure 6 is a schematic structural diagram of the flow blocking plate of the present invention;

[0027] Figure 7 is a schematic structural diagram of the substrate of the present invention;

[0028] Figure 8 is a schematic working principle diagram of the present invention.

[0029] Reference numerals in the figures: 1 - well frame; 11 - connecting column; 12 - lower flange part; 13 - reinforcing rib; 2 - well seat; 21 - installation groove; 22 - inner groove body; 23 - sliding groove; 24 - extension part; 3 - cover plate; 31 - protruding part; 32 - first exhaust port; 33 - second exhaust port; 34 - pressure relief cavity; 35 - cable channel; 36 - pressure relief channel; 37 - guide rail groove; 4 - flow blocking plate; 41 - pressure-bearing elastic member; 42 - steel wire rope; 43 - flow dividing net; 5 - substrate; 51 - explosion-proof isolation net; 52 - base; 53 - rope winder; 6 - first pressure relief assembly; 61 - rotating plate; 62 - rotating shaft; 621 - casing; 622 - return spring; 63 - cable; 64 - guide wheel; 65 - connecting seat; 66 - sliding connecting rod; 67 - guide seat; 68 - lead screw; 69 - bearing; 7 - second pressure relief assembly; 71 - elastic member; 72 - piston block; 8 - controller; 81 - motor; 82 - memory; 9 - data acquisition module; 91 - air pressure sensor; 92 - temperature sensor; 93 - pressure sensor; 94 - explosion-proof cable; 95 - angular displacement sensor. Specific embodiments

[0030] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Embodiment 1:

[0032] Please refer to Figures 1-8 , this embodiment provides a safety manhole cover for intelligent pressure relief and explosion suppression to prevent the manhole cover from flying up, which includes a manhole frame 1 and a manhole seat 2. A lower flange portion 12 is provided at the bottom of the manhole frame 1, and an installation groove 21 is provided on the manhole seat 2. The lower flange portion 12 is inserted into the installation groove 21, and the manhole seat 2 is wrapped inside the manhole frame 1.

[0033] Among them, the manhole seat 2 is a cylindrical hollow cavity. A cover plate 3, a flow blocking plate 4, and a base plate 5 are sequentially installed in the manhole seat 2 from top to bottom. A plurality of connecting columns 11 are spaced on the inner side surface of the manhole frame 1. The connecting columns 11 are fixedly connected to the cover plate 3. The manhole frame 1 is connected to the cover plate 3 through the connecting columns 11, and the connection stability is good. A convex portion 31 is provided on the outer side surface of the cover plate 3, and an inner groove body 22 matching the convex portion 31 is provided on the inner side surface of the manhole seat 2. An extending portion 24 extending downward is provided on the bottom surface of the manhole seat 2. The extending portion 24 is beneficial to strengthening the fastening support of the bottom area of the manhole cover to the manhole cover. The overall connection stability of the manhole cover is good, and the connection strength is high, which can avoid the flying up of the manhole cover and has high safety.

[0034] A plurality of first exhaust ports 32 and a plurality of second exhaust ports 33 are distributed on the top surface of the cover plate 3. A pressure relief cavity 34 and a plurality of pressure relief channels 36 are provided inside the cover plate 3. Specifically, the pressure relief cavity 34 communicates with a plurality of first exhaust ports 32, and the pressure relief channels 36 respectively communicate with the second exhaust ports 33. A first pressure relief component 6 is provided in the pressure relief cavity 34, and a second pressure relief component 7 is provided in the pressure relief channels 36.

[0035] A flame retardant and explosion isolation net 51 is installed at the bottom of the base plate 5. The base plate 5 is an annular body that is vertically penetrated. The flame retardant and explosion isolation net 51 is arranged in the penetrated area of the base plate 5. The flame retardant and explosion isolation net 51 is used for flame retardant and explosion suppression. It has excellent thermal conductivity and can quickly absorb most of the heat generated by the explosion gas, greatly reducing the temperature in the manhole cover, reducing the expansion degree of the gas in the manhole cover. The flame retardant and explosion isolation net 51 should be connected to a heat conduction transmission member to output and conduct the absorbed heat to the external environment for timely cooling and heat dissipation.

[0036] The safety manhole cover further includes a controller 8 and a data acquisition module 9. The controller 8 is electrically connected to the data acquisition module 9. The data acquisition module 9 is arranged in a foundation pit or a preset channel at the bottom of the manhole seat 2. The data acquisition module 9 includes a pressure sensor 91 and a temperature sensor 92. The pressure and temperature data at the bottom of the manhole cover are monitored in real time through the pressure sensor 91 and the temperature sensor 92 and fed back to the controller 8. A memory 82 is provided in the controller 8. The memory 82 is used to record and store the data transmitted by the data acquisition module 9.

[0037] Among them, the first pressure relief component 6 includes a rotating plate 61 rotatably connected in the pressure relief cavity 34, a rotating shaft 62 fixedly connected to the rotating plate 61, a cable 63 fixedly connected to the end of the rotating plate 61 away from the rotating shaft 62, a guide wheel 64, a connecting seat 65, a sliding connecting rod 66, a guide seat 67, and a vertically arranged lead screw 68. The end of the lead screw 68 is rotatably connected to the cover plate 3 through a bearing 69. A cable passage 35 for the cable 63 to pass through is provided in the cover plate 3. The guide wheels 64 are oppositely arranged at the inlet and outlet ends of the cable passage 35. An inner cavity is provided at the central position inside the cover plate 3. The controller 8 is electrically connected to a motor 81 installed at the bottom wall of the inner cavity. Whether to actively relieve pressure through the first pressure relief component 6 is determined by the air pressure and temperature data fed back by the air pressure sensor 91 and the temperature sensor 92 received by the controller 8. When it is determined to actively relieve pressure, the controller 8 outputs an excitation signal to the motor 81 to make the motor 81 operate, driving the first pressure relief component 6 to work, rotating the rotating plate 61, actively opening the pressure relief cavity 34, and connecting the pressure relief cavity 34 with the first exhaust port 32 for exhaust pressure relief and heat dissipation; An angular displacement sensor 95 is installed on the output shaft of the motor 81. The angular displacement sensor 95 is electrically connected to the data acquisition module 9. The angular displacement sensor 95 is used to feedback the angular displacement data of the output shaft of the motor 81. The end of the output shaft of the motor 81 is connected to the lead screw 68. The connecting seat 65 is sleeved outside the lead screw 68. A threaded portion slidably connected to the lead screw 68 is provided in the connecting seat 65. The guide seat 67 is arranged on the side wall of the inner cavity. One end of the sliding connecting rod 66 is fixedly connected to the outer side surface of the connecting seat 65, and the other end is slidably connected to the guide seat 67. The guide seat 67 limits the sliding of the sliding connecting rod 66. The threaded portion is helically engaged with the lead screw 68, converting the rotational movement of the lead screw 68 into the linear displacement of the connecting seat 65. Thus, the connecting seat 65 drives the cable 63, and the cable 63 drives the rotating plate 61, making the pressure relief cavity 34 communicate with the first exhaust port 32. A buffer member for limiting and buffering the rotational impact of the rotating plate 61 contacting the side wall of the pressure relief cavity 34 needs to be provided in the pressure relief cavity 34 to avoid damaging the first pressure relief component 6 and the cover plate 3.

[0038] The second pressure relief component 7 includes an elastic member 71 and a piston block 72. The elastic member 71 is fixedly connected to the piston block 72. A guide rail groove 37 communicating with the pressure relief passage 36 is horizontally provided in the cover plate 3. The piston block 72 is slidably connected to the guide rail groove 37. A pressure sensor 93 is installed on the piston block 72. The pressure sensor 93 is electrically connected to the data acquisition module 9. The pressure sensor 93 is used to detect the pushing force of the air pressure received by the piston block 72 and feedback it to the data acquisition module 9. The data acquisition module 9 transmits it to the memory 82 in the controller 8 for recording and storage.

[0039] In some embodiments, a plurality of reinforcing ribs 13 are annularly distributed on the outer side surface of the well frame 1. The reinforcing ribs 13 are used to increase the overall contact area between the manhole cover and the embedded ground or ground structure, so as to prevent the fault displacement and deformation of the ground base layer during the pressure relief process, damage the terrain around the manhole cover, and cause damage to the original installation structure of the manhole cover.

[0040] In some embodiments, the data acquisition module 9 is electrically connected to the controller 8 through the explosion-proof cable 94. It has strong anti-interference ability and fast data transmission, which is beneficial to the active pressure relief work of the manhole cover. Moreover, it has good flame retardant and strength properties and can be applied to the connection and operation in harsh environments such as explosion and combustion.

[0041] Example 2:

[0042] On the basis of the above embodiments, a chute 23 is provided on the inner side of the well seat 2. The side end of the flow blocking plate 4 is slidably connected to the chute 23. A flow dividing net 43 is installed inside the flow blocking plate 4. A pressure-bearing elastic member 41 is fixedly connected to the upper end surface of the flow blocking plate 4. The pressure-bearing elastic member 41 is fixedly connected to the bottom surface of the cover plate 3. A steel wire rope 42 is fixedly connected to the lower end surface of the flow blocking plate 4. A base 52 is provided on the upper end surface of the base plate 5. A rope winding device 53 for automatically collecting the steel wire rope 42 is provided inside the base 52. The steel wire rope 42 is connected to the rope winding device 53.

[0043] The flow blocking plate 4 absorbs the impact kinetic energy carried by the air pressure during explosion through the provided pressure-bearing elastic member 41 and the steel wire rope 42. Specifically, when the flow blocking plate 4 is pushed up by the air pressure, the pressure-bearing elastic member 41 is compressed, and the reverse force generated by the cover plate 3 causes the flow blocking plate 4 to be supported downward by the pressure-bearing elastic member 41, and the impact energy of the air pressure is converted into elastic potential energy; the steel wire rope 42 is affected by the pulling force of the flow blocking plate 4, the rope winding device 53 unwinds, and the traction length of the steel wire rope 42 is limited. The steel wire rope 42 acts downward on the flow blocking plate 4, effectively enhancing the safety performance of the manhole cover. The chute 23 in the well seat 2 is slidably connected to the flow blocking plate 4, which constitutes a directional limit for the movement of the flow blocking plate 4 and promotes the flow blocking and flow dividing work of the flow blocking plate 4.

[0044] Example 3:

[0045] The difference between this embodiment and Embodiment 1 is that a sleeve 621 is wrapped around the outer side of the rotating shaft 62. A return spring 622 is installed between the sleeve 621 and the rotating shaft 62. The sleeve 621 is fixedly connected to the cover plate 3. The return spring 622 is used for the reset of the rotating shaft 62. When the motor 1 rotates to drive the lead screw 68 to drive the connecting seat 65 back to the initial position, under the reverse force of the return spring 622, the rotating shaft 62 drives the rotating plate 61 to reset.

[0046] The working principle of the present invention is as follows. The split-type flow resistance and pressure relief are carried out by using the cover plate 3, the flow resistance plate 4 and the substrate 5. The explosion-proof isolation net 51 has flame retardant and explosion suppression functions, and can filter the debris carried by the air pressure to avoid blocking the internal structure of the well cover. The flow resistance plate 4 absorbs the impact kinetic energy carried by the air pressure during the explosion through the pressure-bearing elastic member 41 and the steel wire rope 42. The cover plate 3 cooperates with the first pressure relief component 6 and the second pressure relief component 7 to carry out pressure relief. Among them, the first pressure relief component 6 actively relieves pressure when the air pressure sensor 91 monitors too high air pressure or the temperature sensor 92 monitors too high temperature. The controller 8 controls the motor 81 to rotate, the lead screw 68 drives the connecting seat 65, the connecting seat 65 pulls the cable 63, the guide wheel 64 adjusts the displacement direction of the cable 63, the cable 63 pulls the rotating plate 61, and actively opens the pressure relief cavity 34 to connect the pressure relief cavity 34 with the first exhaust port 32, so as to exhaust and relieve pressure and dissipate heat in time. The first pressure relief component 6 can carry out passive pressure relief. When the air pressure is relatively high, the pressure acts to lift the cover plate 61, and the cable 63 moves as the cover plate 61 rotates, which can make the well cover have sufficient pressure relief margin and its pressure relief method is flexible. The second pressure relief component carries out passive pressure relief. During the explosion, the air flow acts on the piston block 72 through the pressure relief channel 36. When the air pressure acting force is higher than the elastic acting force of the elastic member 71, the piston block 72 slides in the guide rail groove 37 and connects the pressure relief channel 36 with the second exhaust port 33 to carry out passive pressure relief and exhaust. The overall pressure relief of the well cover is flexible and the safety is high.

[0047] The above describes the preferred embodiments of this patent in detail, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes and improvements can be made without departing from the gist of this patent.

Claims

1. An intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up, characterized in that It includes a well frame (1) and a well seat (2). The bottom of the well frame (1) is provided with a downward flange portion (12). The well seat (2) is provided with an installation groove (21). The downward flange portion (12) is inserted into the installation groove (21). The well seat (2) is wrapped and arranged inside the well frame (1). The well seat (2) is a cylindrical hollow cavity. Inside the well seat (2), a cover plate (3), a flow blocking plate (4), and a substrate (5) are installed in sequence from top to bottom. On the inner side surface of the well frame (1), a plurality of connecting columns (11) are arranged at intervals. The connecting columns (11) are fixedly connected to the cover plate (3). On the outer side surface of the cover plate (3), a convex portion (31) is provided. On the inner side surface of the well seat (2), an inner groove body (22) matching the convex portion (31) is provided. On the bottom surface of the well seat (2), an extending portion (24) extending downward is provided. On the top surface of the cover plate (3), a plurality of first exhaust ports (32) and a plurality of second exhaust ports (33) are distributed. Inside the cover plate (3), a pressure relief cavity (34) and a plurality of pressure relief channels (36) are provided. The pressure relief cavity (34) communicates with a plurality of the first exhaust ports (32). The pressure relief channels (36) respectively communicate with the second exhaust ports (33). Inside the pressure relief cavity (34), a first pressure relief component (6) is provided. Inside the pressure relief channels (36), a second pressure relief component (7) is provided. At the bottom of the substrate (5), an explosion-proof isolation net (51) is installed. It also includes a controller (8) and a data acquisition module (9). The controller (8) is electrically connected to the data acquisition module (9). The data acquisition module (9) includes a barometric pressure sensor (91) and a temperature sensor (92); The first pressure relief component (6) includes a rotating plate (61) rotatably connected inside the pressure relief cavity (34), a rotating shaft (62) fixedly connected to the rotating plate (61), a cable (63) fixedly connected to the end of the rotating plate (61) far from the rotating shaft (62), a guide wheel (64), a connecting seat (65), a sliding connecting rod (66), a guide seat (67), and a vertically arranged lead screw (68). Inside the cover plate (3), a cable channel (35) for the cable (63) to pass through is provided. The guide wheels (64) are oppositely arranged at the inlet and outlet ends of the cable channel (35). At the central position inside the cover plate (3), there is an inner cavity. The controller (8) is electrically connected to a motor (81) installed at the bottom wall of the inner cavity. An angular displacement sensor (95) is installed on the output shaft of the motor (81). The angular displacement sensor (95) is electrically connected to the data acquisition module (9). The end of the output shaft of the motor (81) is connected to the lead screw (68). The connecting seat (65) is sleeved outside the lead screw (68). Inside the connecting seat (65), a thread portion slidably connected and matching the lead screw (68) is provided. The guide seat (67) is arranged on the side wall of the inner cavity. One end of the sliding connecting rod (66) is fixedly connected to the outer side surface of the connecting seat (65), and the other end is slidably connected to the guide seat (67); A sleeve (621) is wrapped around the outer side of the rotating shaft (62), a return spring (622) is installed between the sleeve (621) and the rotating shaft (62), and the sleeve (621) is fixedly connected to the cover plate (3). The second pressure relief component (7) includes an elastic member (71) and a piston block (72). The elastic member (71) is fixedly connected to the piston block (72). A guide rail groove (37) communicating with the pressure relief channel (36) is horizontally arranged in the cover plate (3), and the piston block (72) is slidably connected to the guide rail groove (37). A chute (23) is provided inside the well seat (2). The side end of the flow blocking plate (4) is slidably connected to the chute (23). A flow dividing net (43) is installed in the flow blocking plate (4). A pressure-bearing elastic member (41) is fixedly connected to the upper end surface of the flow blocking plate (4), and the pressure-bearing elastic member (41) is fixedly connected to the bottom surface of the cover plate (3). A steel wire rope (42) is fixedly connected to the lower end surface of the flow blocking plate (4). A base (52) is provided on the upper end surface of the substrate (5), a rope winding device (53) for automatically collecting the steel wire rope (42) is arranged in the base (52), and the steel wire rope (42) is connected to the rope winding device (53).

2. The intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up according to claim 1, characterized in that: The end of the lead screw (68) is rotatably connected to the cover plate (3) through a bearing (69).

3. The intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up according to claim 1, characterized in that: A pressure sensor (93) is installed on the piston block (72), and the pressure sensor (93) is electrically connected to the data acquisition module (9).

4. The intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up according to claim 1, characterized in that: A plurality of reinforcing ribs (13) are annularly distributed on the outer side surface of the well frame (1).

5. The intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up according to claim 1, characterized in that: A memory (82) is provided in the controller (8), and the memory (82) is used to record and store the data transmitted by the data acquisition module (9).

6. The intelligent safety manhole cover for relieving pressure and suppressing explosion to prevent the manhole cover from flying up according to claim 1, characterized in that: The data acquisition module (9) is electrically connected to the controller (8) through an explosion-proof cable (94).

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