A high-strength electric slide-rail type hydraulic fireproof manhole cover and its method

Abstract

The present invention discloses a high-strength electric slide rail type hydraulic fireproof manhole cover and a method thereof, belonging to the technical field of escape manhole covers. A high-strength electric slide rail type hydraulic fireproof manhole cover and a method thereof, comprising an underground escape hatch and a manhole frame, wherein the manhole frame is arranged above one end of the underground escape hatch, a pull-type manhole cover is arranged above the manhole frame, and an escape hatch door is arranged between the pull-type manhole cover and the underground escape hatch. In order to solve the problem that in the event of an emergency, there may be injured persons whose own movements are restricted and they are unable to complete the evacuation independently, resulting in delayed escape time and inability to effectively protect personal life safety, a liftable hydraulic ladder frame 1 structure is arranged between the underground escape hatch and the manhole cover to assist escaping personnel in rapid evacuation, and the manhole cover structure above the manhole frame adopts a pull-type hydraulic electric control structure, which slides to both sides when in use, and can reserve more space for escape and rescue operations.

Description

Technical Field

[0001] The present invention relates to the technical field of escape manhole covers, in particular to a high-strength electric slide rail type hydraulic fireproof manhole cover and a method thereof. Background Art

[0002] Urban integrated pipeline corridors not only have water, gas, electricity, and communication pipelines that maintain urban functions, but when pipeline corridor accidents occur, on the one hand, emergency plans must be activated to ensure the safety of the facilities in the corridor. On the other hand, when disasters occur, the safety of personnel working underground or those going down to the well to eliminate dangers must also be guaranteed. In extreme cases, it is particularly important that personnel in the pipeline corridor can evacuate the scene smoothly. The escape hatches in the pipeline corridor are designed for personnel evacuation.

[0003] Application number 202122343374.1 discloses a self-opening tunnel escape fire manhole cover, which is driven by a motor to rotate the turntable in the transmission box, and under the action of the cam shaft, drives the ring plate to move back and forth longitudinally, thereby driving the push-pull rod to push or pull back the escape manhole cover, thereby opening or closing the escape manhole cover, realizing the self-opening of the escape manhole cover, so that escaping personnel can quickly leave the escape shaft without manually operating the manhole cover, greatly improving the escape speed and ensuring personal safety.

[0004] 1) In the above patent, there is no climbing auxiliary structure in the wellhead area, which will affect the time and efficiency of escape and rescue in actual use;

[0005] 2) In the event of an emergency, there may be casualties. The casualties' own movements are restricted and they cannot evacuate independently, resulting in delayed escape time and inability to effectively protect their personal lives. Therefore, the existing needs are not met, and a high-strength electric slide-type hydraulic fireproof manhole cover and method thereof are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-strength electric slide-type hydraulic fireproof manhole cover and its method. A liftable hydraulic ladder frame 1 structure is arranged between the underground escape cabin and the manhole cover to assist the escape personnel in evacuating quickly. The manhole cover structure above the manhole frame adopts a pull-type hydraulic electric control structure, which slides and unfolds to both sides when in use, and can reserve more escape and rescue operation space, which can solve the problems in the existing technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-strength electric slide-type hydraulic fireproof manhole cover, comprising an underground escape hatch and a manhole frame, wherein the manhole frame is arranged above one end of the underground escape hatch, a pull-type manhole cover is arranged above the manhole frame, an escape hatch door is arranged between the pull-type manhole cover and the underground escape hatch, an inner shaft motor is arranged above the pull-type manhole cover, a threaded inner shaft is arranged inside the inner shaft motor, the threaded inner shaft is rotatably connected to the inner shaft motor, a locking shaft screw is arranged inside the threaded inner shaft, and the locking shaft screw is connected to the threaded inner shaft via an internal thread;

[0008] A hydraulic ladder frame is provided below the escape hatch, and the hydraulic ladder frame is slidably connected to the underground escape hatch. A folding ladder plate is provided on the outer surface of the hydraulic ladder frame, and the folding ladder plate is rotatably connected to the hydraulic ladder frame through a driving shaft.

[0009] Preferably, the hydraulic bottom box below the hydraulic ladder frame is connected to the underground escape hatch by screws, the lifting hydraulic assembly inside the hydraulic bottom box is fit-connected to the hydraulic ladder frame, the hatch seat rail on one side of the bottom of the hydraulic ladder frame is connected to the underground escape hatch by screws, and an escape cart is provided above the hatch seat rail.

[0010] Preferably, a replacement ventilation roof window is provided at the top of the underground escape hatch, a rainproof roof is provided at the top of the replacement ventilation roof window, and a fan frame assembly is provided at the bottom of the replacement ventilation roof window, which extends to the interior of the underground escape hatch.

[0011] Preferably, a combined stretcher is provided above the escape cart, the combined stretcher is slidably connected to the escape cart via a slide groove, an elastic strap is provided on the outer side of the combined stretcher, and a handle is provided at one end of the combined stretcher.

[0012] Preferably, a frame lock plate is provided at one end of the escape cart, a storage seat groove is provided at the bottom of the escape cart, a cart slide is provided at one end of the storage seat groove, the cart slide is rotatably connected to the storage seat groove through an end face coupling, and the escape cart is slidably connected to the cabin way seat rail through the cart slide.

[0013] Preferably, the pull-type manhole cover includes a first cover plate and a second cover plate, a circular lock shaft is provided on one side of the first cover plate, and a circular lock sleeve is provided on one side of the second cover plate, the circular lock shaft is fittedly connected with the circular lock sleeve, the inner shaft motor is provided above the circular lock sleeve, and the lock shaft screw extends through and into the interior of the circular lock shaft and the circular lock sleeve.

[0014] Preferably, independent power supply boxes are provided at both ends of the well frame, hydraulic pull rods are provided on the inner sides of both ends of the independent power supply boxes, a sprocket groove is provided at the bottom of the well frame, and parallel gears are provided inside the sprocket groove. The hydraulic pull rods are connected to the first cover plate and the second cover plate by screws, and the first cover plate and the second cover plate are both slidably connected to the sprocket groove through parallel gears.

[0015] A method for using a high-strength electric slide-type hydraulic fireproof manhole cover, comprising the following steps:

[0016] Step 1: When an emergency occurs, the motor structure above the manhole cover is turned on by an independent control switch. The threaded inner shaft inside the motor rotates clockwise, driving the internal locking screw to rise.

[0017] Step 2: After the locking shaft screw is separated from the circular locking shaft and the round lock sleeve, the independent power boxes at both ends of the well frame control the hydraulic pull rods to pull the well cover plates on both sides outward, so that the escape hatch at the top of the underground escape hatch is connected to the outside world;

[0018] Step 3: After the hatch is connected to the outside world, the evacuees enter the underground escape tunnel. If there are injured people with limited mobility, they can be placed on the combined stretcher at the entrance of the tunnel and secured to the stretcher with side straps.

[0019] Step 4: Use the cart and track structure at the bottom of the stretcher to move the injured person to the bottom of the escape hatch. Place one end of the cart against the bottom of the hydraulic ladder and use the lifting hydraulic assembly below the hydraulic ladder to lift the hydraulic ladder. The cart and the stretcher will rise together with the hydraulic ladder. During the ascent, push the cart inward. When the hydraulic ladder reaches its maximum height, the person outside the hatch can use the handle to pull the stretcher off the cart and pull the injured person out.

[0020] Step 5: After the injured have been evacuated, control the hydraulic ladder to descend, and flip and unfold the folding ladder plates on its surface. The remaining personnel then evacuate the cabin through the folding ladder plates.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention places the injured person on a combined stretcher at the hatch entrance and secures the person to the stretcher with side straps. The injured person is then moved to the bottom of the escape hatch door using a cart and track structure at the bottom of the stretcher. One end of the cart is placed against the bottom of a hydraulic ladder frame, and the hydraulic ladder frame is lifted up using a lifting hydraulic assembly below the hydraulic ladder frame. The cart and the stretcher rise together with the hydraulic ladder frame. During the ascent, the cart is pushed inward so that the bottom of the cart fits into the hydraulic ladder frame. In this way, the hydraulic ladder frame can be used to lift and support the cart. When the hydraulic ladder frame reaches its maximum height, personnel outside the hatch door can pull the stretcher off the cart using a handle, thereby pulling the injured person out.

[0023] 2. In the present invention, when the hatch is connected to the outside world, the hot air flow caused by the fire will directly enter the interior of the underground escape hatch 1. The temperature of the air flow outside is lower than the temperature of the air flow inside the hatch. Therefore, the hot air flow entering the hatch will move toward the hatch door along the top of the hatch. At this time, the hot air flow and smoke entering the hatch can be discharged through the replacement ventilation top window 4, avoiding the accumulation of high-temperature smoke inside the hatch. At the same time, it also prevents the smoke from being discharged from the hatch door, which affects the escape line of sight and rescue operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall front view of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the cabin runway seat rail structure of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the escape vehicle of the present invention;

[0028] Figure 5 This is a schematic structural diagram of the escape vehicle of the present invention;

[0029] Figure 6 It is a schematic diagram of the pull-type manhole cover structure of the present invention.

[0030] In the figure: 1. Underground escape hatch; 2. Manhole frame; 3. Pull-type manhole cover; 4. Replacement ventilation roof window; 5. Inner shaft motor; 101. Hydraulic bottom box; 102. Hydraulic ladder frame; 103. Cabin seat rail; 104. Escape cart; 105. Cart slide; 106. Escape hatch door; 1011. Lifting hydraulic assembly; 1021. Folding ladder board; 1022. Drive shaft; 1041. Combined stretcher; 1042. Elastic strap; 1 043. Handle; 1044. Storage seat slot; 1045. Frame lock plate; 1051. End coupling; 201. Independent power box; 202. Hydraulic pull rod; 203. Sprocket slide; 204. Parallel gear; 301. First cover plate; 302. Second cover plate; 3011. Round lock shaft; 3021. Round lock sleeve; 401. Rainproof roof; 402. Fan frame assembly; 501. Lock shaft screw; 502. Threaded inner shaft. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-2 , the present invention provides an embodiment: a high-strength electric slide-type hydraulic fireproof manhole cover, including an underground escape hatch 1 and a manhole frame 2, the manhole frame 2 is arranged above one end of the underground escape hatch 1, a pull-type manhole cover 3 is arranged above the manhole frame 2, an escape hatch door 106 is arranged between the pull-type manhole cover 3 and the underground escape hatch 1, an inner shaft motor 5 is arranged above the pull-type manhole cover 3, a threaded inner shaft 502 is arranged inside the inner shaft motor 5, the threaded inner shaft 502 is rotatably connected to the inner shaft motor 5, a locking screw 501 is arranged inside the threaded inner shaft 502, the locking screw 501 is connected to the threaded inner shaft 502 through an internal thread, a hydraulic ladder frame 102 is arranged below the escape hatch 106, the hydraulic ladder frame 102 is slidably connected to the underground escape hatch 1, the outer surface of the hydraulic ladder frame 102 is provided with a folding ladder plate 1021, and the folding ladder plate 1021 is rotatably connected to the hydraulic ladder frame 102 through a driving shaft 1022;

[0033] A liftable hydraulic ladder 102 structure is provided between the underground escape hatch 1 and the manhole cover to assist the escapees in evacuating quickly.

[0034] The manhole cover structure above the manhole frame 2 adopts a pull-type hydraulic and electric control structure, which slides to both sides when in use, and can reserve more space for escape and rescue operations.

[0035] See also Figure 1-5 The hydraulic bottom box 101 below the hydraulic ladder frame 102 is connected to the underground escape hatch 1 by screws, the lifting hydraulic assembly 1011 inside the hydraulic bottom box 101 is fitted and connected to the hydraulic ladder frame 102, and the hatch seat rail 103 on one side of the bottom of the hydraulic ladder frame 102 is connected to the underground escape hatch 1 by screws. An escape cart 104 is provided above the hatch seat rail 103, and a replacement ventilation roof window 4 is provided on the top of the underground escape hatch 1. A rainproof roof 401 is provided on the top of the replacement ventilation roof window 4, and a fan frame assembly 402 is provided at the bottom of the replacement ventilation roof window 4. The fan frame assembly 402 extends to the interior of the underground escape hatch 1, and the escape cart 10 4 is provided with a combined stretcher 1041, the combined stretcher 1041 is slidably connected to the escape cart 104 through a slide groove, an elastic band 1042 is provided on the outside of the combined stretcher 1041, a handle 1043 is provided at one end of the combined stretcher 1041, a frame lock plate 1045 is provided at one end of the escape cart 104, a storage seat groove 1044 is provided at the bottom of the escape cart 104, one end of the storage seat groove 1044 is provided with a cart sliding sleeve 105, the cart sliding sleeve 105 is rotatably connected to the storage seat groove 1044 through an end face coupling 1051, and the escape cart 104 is slidably connected to the cabin road seat rail 103 through the cart sliding sleeve 105;

[0036] When the hatch is connected to the outside, the hot air flow caused by the fire will directly enter the interior of the underground escape hatch 1. The temperature of the air flow outside is lower than that of the air flow inside the hatch. Therefore, the hot air flow entering the hatch will move along the top of the hatch toward the hatch. At this time, the hot air flow and smoke entering the hatch can be discharged through the replacement ventilation top window 4, preventing the accumulation of high-temperature smoke inside the hatch and preventing the smoke from being discharged from the hatch door, which would affect the escape line of sight and rescue operations.

[0037] The injured person is placed on the combined stretcher 1041 at the entrance of the hatch, and the person and the stretcher are fixed with side straps. The injured person is moved to the bottom of the escape hatch 106 by the cart and track structure at the bottom of the stretcher. One end of the cart is placed against the bottom of the hydraulic ladder frame 102, and the hydraulic ladder frame 102 is lifted up by the lifting hydraulic assembly 1011 under the hydraulic ladder frame 102. The cart and the stretcher will rise together with the hydraulic ladder frame 102. During the rising process, the cart is pushed inward so that the bottom of the cart fits into the hydraulic ladder frame 102. In this way, the hydraulic ladder frame 102 can be used to lift and support the cart. When the hydraulic ladder frame 102 is raised to the maximum height, the person outside the hatch can pull the stretcher out of the cart by the handle 1043, and then pull the injured person out.

[0038] The folding ladder plates 1021 on the surface of the hydraulic ladder frame 102 can be turned over and unfolded to form a step-like structure, so that people with easy mobility can evacuate the cabin passage through the hydraulic ladder frame 102.

[0039] See also Figure 1 and Figure 6 The pull-type manhole cover 3 includes a first cover plate 301 and a second cover plate 302. A circular locking shaft 3011 is provided on one side of the first cover plate 301, and a circular locking sleeve 3021 is provided on one side of the second cover plate 302. The circular locking shaft 3011 is fitted and connected with the circular locking sleeve 3021. The inner shaft motor 5 is arranged above the circular locking sleeve 3021, and the locking shaft screw 501 extends through the circular locking shaft 3011 and the circular locking sleeve 3021. Independent power boxes 201 are provided at both ends of the well frame 2, and hydraulic pull rods 202 are provided on the inner sides of both ends of the independent power box 201. A sprocket slot 203 is provided at the bottom of the well frame 2, and a parallel gear 204 is provided inside the sprocket slot 203. The hydraulic pull rod 202 is connected to the first cover plate 301 and the second cover plate 302 by screws, and the first cover plate 301 and the second cover plate 302 are both slidably connected to the sprocket slot 203 through the parallel gear 204;

[0040] When an emergency occurs, the motor structure above the manhole cover is turned on by an independent control switch, and the threaded inner shaft 502 inside the motor rotates clockwise, driving the locking shaft screw 501 inside it to rise. After the locking shaft screw 501 disengages from the circular locking shaft 3011 and the round lock sleeve 3021, the independent power supply boxes 201 at both ends of the well frame 2 control the hydraulic pull rod 202 to pull the manhole cover plates on both sides to move outward, thereby realizing the opening and closing operation of the manhole cover.

[0041] A method for using a high-strength electric slide-type hydraulic fireproof manhole cover, comprising the following steps:

[0042] Step 1: When an emergency occurs, the motor structure above the manhole cover is turned on by an independent control switch, and the threaded inner shaft 502 inside the motor rotates clockwise, driving the locking screw 501 inside it to rise;

[0043] Step 2: After the locking screw 501 is separated from the circular locking shaft 3011 and the circular locking sleeve 3021, the independent power supply boxes 201 at both ends of the well frame 2 control the hydraulic pull rods 202 to pull the well cover plates on both sides outward, so that the escape hatch 106 at the top of the underground escape hatch 1 is connected to the outside world;

[0044] Step 3: After the hatch is connected to the outside world, the evacuees enter the underground escape tunnel 1. If there are injured persons with limited mobility, they can be placed on the combined stretcher 1041 at the tunnel entrance and secured to the stretcher using side straps.

[0045] Step 4: Use the cart and track structure at the bottom of the stretcher to move the injured person to the bottom of the escape hatch 106. Place one end of the cart against the bottom of the hydraulic ladder 102. Use the lifting hydraulic assembly 1011 below the hydraulic ladder 102 to lift the hydraulic ladder 102. The cart and the stretcher will rise together with the hydraulic ladder 102. During the ascent, push the cart inward. When the hydraulic ladder 102 reaches its maximum height, the person outside the hatch can use the handle 1043 to pull the stretcher off the cart and then pull the injured person out.

[0046] Step 5: After the injured are evacuated, the hydraulic ladder frame 102 is controlled to descend, and the folding ladder plate 1021 on its surface is turned over and unfolded, and then the remaining personnel evacuate the interior of the cabin through the folding ladder plate 1021.

[0047] The working principle is that the motor structure above the manhole cover is opened by an independent control switch, and the threaded inner shaft 502 inside the motor rotates clockwise, driving the locking shaft screw rod 501 inside it to rise. After the locking shaft screw rod 501 disengages from the circular locking shaft 3011 and the round lock sleeve 3021, the independent power supply boxes 201 at both ends of the manhole frame 2 control the hydraulic pull rod 202 to pull the manhole cover plates on both sides to move outward, so that the escape hatch 106 at the top of the underground escape hatch 1 is connected to the outside. When the hatch is connected to the outside, the hot air flow caused by the fire will directly enter the interior of the underground escape hatch 1. The air flow temperature outside is lower than the air flow temperature inside the cabin, so the hot air flow entering the cabin will move toward the hatch along the top of the cabin. At this time, the hot air flow and smoke entering the cabin can be discharged through the replacement ventilation top window 4, so as to avoid the accumulation of high-temperature smoke in the cabin. At the same time, it also prevents the smoke from being discharged from the hatch door, affecting the escape sight and rescue operation. When the injured person is unable to move, he or she can be placed on the combined stretcher 1041 at the entrance of the escape hatch 1 and fixed to the stretcher by side straps. The injured person is moved to the bottom of the escape hatch 106 by the cart and track structure at the bottom of the stretcher, and one end of the cart is placed against the bottom of the hydraulic ladder frame 102. The hydraulic ladder frame 102 is lifted up by the lifting hydraulic assembly 1011 under the hydraulic ladder frame 102. The cart and the stretcher will rise together with the hydraulic ladder frame 102. During the rising process, the cart is pushed inward. When the hydraulic ladder frame 102 is raised to the maximum height, the person outside the hatch can pull the stretcher out of the cart by the handle 1043, and then pull the injured person out. After the injured person is evacuated, the hydraulic ladder frame 102 is controlled to descend, and the folding ladder plate 1021 on its surface is flipped and unfolded, and then the remaining people evacuate the hatch through the folding ladder plate 1021.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength electric slide rail hydraulic fireproof manhole cover, comprising an underground escape hatch (1) and a manhole frame (2), characterized in that: The manhole frame (2) is arranged above one end of the underground escape hatch (1); a pull-type manhole cover (3) is arranged above the manhole frame (2); an escape hatch door (106) is arranged between the pull-type manhole cover (3) and the underground escape hatch (1); an inner shaft motor (5) is arranged above the pull-type manhole cover (3); a threaded inner shaft (502) is arranged inside the inner shaft motor (5); the threaded inner shaft (502) is rotatably connected to the inner shaft motor (5); a locking shaft screw (501) is arranged inside the threaded inner shaft (502); the locking shaft screw (501) and the threaded inner shaft (502) are connected via an inner thread; A hydraulic ladder frame (102) is provided below the escape hatch (106), the hydraulic ladder frame (102) being slidably connected to the underground escape hatch (1), and a folding ladder plate (1021) being provided on the outer surface of the hydraulic ladder frame (102), the folding ladder plate (1021) being rotatably connected to the hydraulic ladder frame (102) via a driving shaft (1022); The hydraulic bottom box (101) below the hydraulic ladder frame (102) is connected to the underground escape hatch (1) by screws, the lifting hydraulic assembly (1011) inside the hydraulic bottom box (101) is fitted and connected to the hydraulic ladder frame (102), the hatch seat rail (103) on one side of the bottom of the hydraulic ladder frame (102) is connected to the underground escape hatch (1) by screws, and an escape trolley (104) is provided above the hatch seat rail (103); A combined stretcher (1041) is provided above the escape trolley (104), and the combined stretcher (1041) is slidably connected to the escape trolley (104) via a slide groove. An elastic band (1042) is provided on the outer side of the combined stretcher (1041), and a handle (1043) is provided at one end of the combined stretcher (1041).

2. The high-strength electric slide-type hydraulic fireproof manhole cover according to claim 1, characterized in that: A replacement ventilation top window (4) is provided at the top of the underground escape hatch (1), a rainproof roof (401) is provided at the top of the replacement ventilation top window (4), and a fan frame assembly (402) is provided at the bottom of the replacement ventilation top window (4), and the fan frame assembly (402) extends into the interior of the underground escape hatch (1).

3. The high-strength electric slide-type hydraulic fireproof manhole cover according to claim 2, characterized in that: One end of the escape cart (104) is provided with a frame lock plate (1045), the bottom of the escape cart (104) is provided with a storage seat groove (1044), one end of the storage seat groove (1044) is provided with a cart sliding sleeve (105), the cart sliding sleeve (105) is rotatably connected to the storage seat groove (1044) through an end face coupling (1051), and the escape cart (104) is slidably connected to the cabin road seat rail (103) through the cart sliding sleeve (105).

4. The high-strength electric slide-type hydraulic fireproof manhole cover according to claim 3, characterized in that: The pull-type manhole cover (3) comprises a first cover plate (301) and a second cover plate (302); a circular locking shaft (3011) is provided on one side of the first cover plate (301); a circular locking sleeve (3021) is provided on one side of the second cover plate (302); the circular locking shaft (3011) is fittedly connected to the circular locking sleeve (3021); the inner shaft motor (5) is provided above the circular locking sleeve (3021); and the locking shaft screw (501) extends through the circular locking shaft (3011) and the circular locking sleeve (3021).

5. The high-strength electric slide-type hydraulic fireproof manhole cover according to claim 4, characterized in that: Independent power supply boxes (201) are provided at both ends of the well frame (2), hydraulic pull rods (202) are provided on the inner sides of both ends of the independent power supply boxes (201), a sprocket chute (203) is provided at the bottom of the well frame (2), a parallel gear (204) is provided inside the sprocket chute (203), the hydraulic pull rod (202) is connected to the first cover plate (301) and the second cover plate (302) by screws, and the first cover plate (301) and the second cover plate (302) are both slidably connected to the sprocket chute (203) by the parallel gear (204).

6. A method for using a high-strength electric slide rail hydraulic fireproof manhole cover, based on the high-strength electric slide rail hydraulic fireproof manhole cover according to claim 5, wherein: The steps include: Step 1: When an emergency occurs, the motor structure above the manhole cover is turned on by an independent control switch, and the threaded inner shaft (502) inside the motor rotates clockwise, driving the locking screw (501) inside it to rise; Step 2: After the locking shaft screw (501) is separated from the circular locking shaft (3011) and the circular locking sleeve (3021), the independent power supply boxes (201) at both ends of the well frame (2) control the hydraulic pull rods (202) to pull the well cover plates on both sides outward, so that the escape hatch (106) at the top of the buried escape hatch (1) is connected to the outside world; Step 3: After the hatch is connected to the outside world, the evacuees enter the underground escape tunnel (1). If there are injured persons with limited mobility, they can be placed on the combined stretcher (1041) at the entrance of the tunnel and secured to the stretcher using side straps. Step 4: Move the injured person to the bottom of the escape hatch (106) by using the pallet and track structure at the bottom of the stretcher, place one end of the pallet against the bottom of the hydraulic ladder (102), and use the lifting hydraulic assembly (1011) below the hydraulic ladder (102) to lift the hydraulic ladder (102). The pallet and the stretcher will rise together with the hydraulic ladder (102). During the rising process, push the pallet inward. When the hydraulic ladder (102) rises to the maximum height, the person outside the hatch can use the handle (1043) to pull the stretcher out of the pallet and then pull the injured person out. Step 5: After the injured have been evacuated, the hydraulic ladder frame (102) is controlled to descend, and the folding ladder plate (1021) on its surface is flipped and unfolded, and then the remaining personnel evacuate the interior of the cabin through the folding ladder plate (1021).

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