CN220580888U - Explosion-proof door - Google Patents

Abstract

The disclosure relates to an explosion vent, comprising a door frame, a door body, a threshold, a shell and a lifting mechanism; the door threshold is arranged at one side of the door body, the shell is buried in the ground, a containing groove is formed in the shell, the door threshold can be arranged in the containing groove in a vertical sliding mode, and the lifting mechanism is linked with the door threshold and used for driving the door threshold to move up and down; one end of the door body, which is close to the door frame, is rotationally connected with the door frame; a limiting structure matched with the threshold is formed at a position corresponding to the uppermost end of the travel of the threshold, and the threshold is abutted with the limiting structure when sliding to the uppermost end of the travel so as to support the door; through elevating system and threshold linkage, set up limit structure in the lower part of the door body simultaneously, avoid the door body to sink because of the dead weight after long-time use, take place with the too tight condition of ground laminating, and then make the door body still can normally open and close after long-time use, avoid the door body and door frame junction to receive other external force influences and become flexible, fracture, guarantee personal safety.

Description

Explosion-proof door

Technical Field

The disclosure relates to the field of civil air defense engineering safety, in particular to an explosion door.

Background

With the development of urban design, more and more civil air defense projects are put into construction, the civil air defense projects can be used as spaces for storing and storing vehicles at ordinary times, and the like, and the civil air defense projects have the effects of air attack prevention and disaster relief when a war or a disaster occurs. The existing explosion-proof door is provided with a movable threshold or a fixed threshold to block gaps between the explosion-proof door and the ground, so that the protection performance and the tightness of the explosion-proof door are ensured, and further harmful conditions of damaging the life and property safety of people, such as shock waves, smoke, water, toxic gas and the like, are blocked;

patent CN208184591U discloses an explosion vent convenient to pass, including explosion vent body, door frame, threshold, infrared human body inductor and elevating gear, the door side of explosion vent body is equipped with infrared human body inductor, the explosion vent body is connected in the lateral wall of door frame, the bottom of door frame is equipped with the recess, elevating gear has set firmly in the recess, elevating gear's lifter and the diapire rigid coupling of threshold, the lifter drives the threshold along being on a parallel with the direction of explosion vent body up-and-down movement, the door side of explosion vent body is dismantled with the lateral wall of threshold and is connected, infrared human body inductor passes through the treater and is connected with elevating gear electricity, the treater is according to infrared human body inductor's signal control elevating gear;

the infrared human body sensor and the lifting device are additionally arranged in the patent, so that the doorsill can automatically lift, and the passing of people and vehicles is facilitated under the condition that the airtight function of the explosion-proof door body is ensured; an electromagnetic lock is additionally arranged, so that the explosion door body is automatically opened or closed; it still suffers from the following drawbacks:

in practical application, because the dead weight of the protective door is large, the base is sunk and is attached to the ground too tightly along with the time, and then the explosion-proof door cannot be normally opened and closed, so that the safety requirement and the passing requirement of vehicle personnel cannot be met; and because the door body dead weight, the door body can receive horizontal force with door frame junction, pulls for a long time, makes the junction become flexible even fracture easily, causes irrecoverable loss, and the structural design of above-mentioned patent can't solve this kind of problem.

Disclosure of Invention

In order to solve the problems in the prior art, an object of the present disclosure is to provide an explosion door, so as to solve the friction problem between the explosion door and the ground and the stress problem at the joint.

An explosion vent of this disclosure, include: the door comprises a door frame, a door body, a threshold, a shell and a lifting mechanism;

the door threshold is arranged on one side of the door body, the shell is buried in the ground, a containing groove is formed in the shell, the door threshold is arranged in the containing groove in a vertically sliding mode, and the lifting mechanism is linked with the door threshold and used for driving the door threshold to move up and down;

one end of the door body, which is close to the door frame, is rotationally connected with the door frame; the door body is close to one side surface of the threshold, a limiting structure matched with the threshold is formed at a position corresponding to the uppermost end of the threshold travel, and the threshold is abutted with the limiting structure to support the door body when sliding to the uppermost end of the threshold travel.

Preferably, the lifting mechanism comprises a hydraulic lifting assembly, the hydraulic lifting assembly comprises hydraulic cylinders and an electromagnetic control assembly, the number of the hydraulic cylinders is matched with the number of the doorsills, the doorsills are hollow cuboid, the hydraulic cylinders are arranged in the shell and are positioned below the doorsills, and one surface, away from the base, of a piston rod of each hydraulic cylinder is connected with the inner top surface of each doorsill;

the electromagnetic control assembly comprises an electromagnetic reversing valve and an electromagnetic control box, wherein the electromagnetic reversing valve is respectively connected with the hydraulic cylinder through signals, and the electromagnetic control box is matched with the electromagnetic reversing valve to control the lifting of the hydraulic cylinder.

Preferably, the hydraulic lifting assembly further comprises a manual control assembly;

the manual control assembly comprises a hydraulic station, a manual reversing valve and a reversing handle, the hydraulic station is in linkage with the hydraulic cylinder, the reversing handle is connected with the manual reversing valve, the manual reversing valve is connected with the hydraulic station, and the reversing handle, the manual reversing valve and the hydraulic station are matched to control lifting of the hydraulic cylinder.

Preferably, the weight G of the individual threshold satisfies:

250kg≤G≤400kg；

the maximum stress F of the hydraulic cylinder meets the following conditions:

F＝G/n*A；

wherein G is the weight of a single threshold, the unit is kg, n is the number of hydraulic cylinders corresponding to each threshold, and A is the safety coefficient;

the cylinder diameter d of the hydraulic cylinder meets the following conditions:

d＝4F/Pπ；

wherein F is the maximum stress of the hydraulic cylinder, and P is the rated working pressure of the hydraulic station.

Preferably, the lifting mechanism comprises a mechanical lifting assembly, the mechanical lifting assembly comprises a screw jack and a rotary handle, a jacking piece of the screw jack is arranged in the accommodating groove, one surface of the jacking piece is abutted against the threshold, and the rotary handle is detachably connected with the transmission mechanism;

and a side, far away from the door body, of the doorsill is provided with a position avoidance hole at a position corresponding to the screw jack, and the transmission mechanism of the screw jack is partially exposed out of the doorsill and in the accommodating groove through the position avoidance hole.

Preferably, the limiting structure comprises a cross beam; the beam is far away from a side edge of the door body and extends downwards to form a baffle structure, and a threshold groove matched with the threshold is formed between the baffle structure and the door body.

Preferably, the explosion door further comprises a cushion pad, and the cushion pad is arranged at the top surface of the threshold and/or the bottom surface of the threshold groove.

Preferably, the explosion vent further comprises a limiting feedback assembly, the limiting feedback assembly comprises a plurality of pressure sensors, and the pressure sensors are arranged at the bottom surface of the threshold groove and are in signal connection with the electromagnetic control box.

Preferably, the explosion vent further comprises a travel feedback assembly, wherein the travel feedback assembly comprises a plurality of infrared distance sensors, each infrared distance sensor is matched with each hydraulic cylinder, and the infrared distance sensors are in signal connection with the electromagnetic control box.

Preferably, an outer edge is formed on the outer peripheral surface of the shell, widening plates are symmetrically arranged on the outer edge, and a supporting plate is arranged below the corresponding position of each widening plate.

The explosion door disclosed by the disclosure has the advantages that:

through setting up elevating system and cooperating elevating system and threshold, set up limit structure in the lower part of the door body simultaneously, when making the threshold go up and down limit structure department, with limit structure butt, and then hold the door body, play the effect of supporting the door body, avoid the door body because dead weight is sunk after long-time use, take place with the too tight condition of ground laminating, and then make the door body still can normally open and close after long-time use, guarantee safeguard function simultaneously, and because the support of threshold, make when closing the door, the door body is in the state of atress equilibrium, therefore the junction of door body and door frame does not receive other external force influence, and then reduce the not hard up cracked risk of door body and door frame junction, ensure personal safety.

Drawings

FIG. 1 is a schematic view of an explosion vent of the present disclosure;

FIG. 2 is a schematic view of the door after closing;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic illustration of the hydraulic cylinder;

FIG. 5 is a schematic illustration of the electromagnetic directional valve;

fig. 6 is a schematic view of the housing.

Reference numerals illustrate: the hydraulic control system comprises a 1-door body, a 2-threshold, a 3-shell, a 31-outer edge, a 32-widening plate, a 33-supporting plate, a 4-hydraulic cylinder, a 5-electromagnetic directional valve, a 6-electromagnetic control box and a 7-hydraulic station.

Detailed Description

As shown in fig. 1 to 5, the explosion door disclosed in the present disclosure includes a door frame, a door body 1, a door sill 2, a housing 3 and a lifting mechanism;

the door sill 2 is arranged on one side of the door body 1, the shell 3 is buried in the ground, a containing groove is formed in the shell 3, the door sill 2 is arranged in the containing groove, and the containing groove is used for limiting the motion freedom degree of the door sill 2 in the horizontal direction and avoiding the door sill 2 from moving in the horizontal direction;

the lifting mechanism is arranged in the accommodating groove, is linked with the doorsill 2 and drives the doorsill 2 to move up and down, and when the uppermost end of the stroke is reached, the doorsill 2 is at least partially exposed above the accommodating groove;

one end of the door body 1, which is close to the door frame, is rotationally connected with the door frame, so that the door body 1 can rotate by taking the rotational connection part as an axis, and the door body 1 can be opened or closed;

the lower part of the door body 1 is provided with a limit structure matched with the threshold 2 at the position corresponding to the threshold 2, when the door body 1 is closed, the lifting assembly is adjusted to drive the threshold 2 to move upwards until part of the threshold 2 is exposed above the accommodating groove, and when the threshold 2 is abutted with the limit structure, the threshold 2 is blocked by the limit structure and cannot move upwards continuously, but the supporting function is provided for the door body 1, so that the ground clearance of the door body 1 is kept unchanged, the door body 1 is not in contact friction with the ground, and the bottom structure of the door body 1 is damaged.

Further, when the doorsill 2 is a hollow cuboid and is placed in the accommodating groove, a space is formed in the inner side of the doorsill 2, the lifting mechanism comprises a hydraulic lifting assembly and an electromagnetic control assembly, the hydraulic lifting assembly comprises hydraulic cylinders 4, the hydraulic cylinders 4 are arranged in the space in the inner side of the doorsill 2, the number of the hydraulic cylinders 4 is matched with the number of the doorsill 2, and in order to ensure the service life of the hydraulic cylinders 4, one doorsill 2 is correspondingly provided with at least two hydraulic cylinders 4;

the hydraulic cylinder 4 comprises a conventional base, a cylinder barrel, a cylinder cover, a piston rod and a sealing device, wherein the base is connected with the accommodating groove so that the whole hydraulic cylinder 4 is stable when lifted; one surface of the piston rod, which is far away from the base, is connected with the top surface of the doorsill 2, preferably in detachable connection, and the doorsill 2 and the piston rod move in the same direction under the drive of the piston rod; the piston rod can also be abutted against the threshold 2, and when the piston rod moves upwards, the piston rod is abutted against the threshold 2 so as to drive the threshold 2 to move upwards; when the piston rod moves downwards, the threshold 2 also clings to the piston rod to move downwards due to the dead weight.

The electromagnetic control assembly comprises an electromagnetic reversing valve 5 and an electromagnetic control box 6; the electromagnetic directional valves 5 are arranged in the accommodating grooves, the number of the electromagnetic directional valves 5 is matched with the number of the hydraulic cylinders 4, one electromagnetic directional valve 5 corresponds to one hydraulic cylinder 4, the electromagnetic directional valves 5 are in signal connection with the hydraulic cylinders 4, each electromagnetic directional valve 5 is in signal connection with the electromagnetic control box 6, and the electromagnetic control box 6 controls the lifting of the piston rod through controlling the electromagnetic directional valves 5, so that the lifting of the threshold 2 is controlled.

Further, in order to ensure that the threshold 2 can still be lifted normally when the electromagnetic control assembly is damaged, a manual control assembly is additionally arranged on the hydraulic lifting assembly;

the manual lifting assembly comprises a hydraulic station 7, a manual reversing valve and a reversing handle, the hydraulic station 7 is in linkage with the hydraulic cylinder 4, rated working pressure P of the hydraulic station 7 is 6.2MPa, the manual reversing valve is connected with the hydraulic station 7, the reversing handle is connected with the manual reversing valve, and when the electromagnetic control assembly is damaged and cannot be used normally, a worker can adjust the manual reversing valve to control the on-off and reversing of the hydraulic station 7 through the reversing handle, so that the lifting of a piston rod is adjusted.

Further, in order to ensure that the weight of the individual door sill 2 can better support the door body 1, the weight G of the individual door sill 2 should satisfy:

g is more than or equal to 250kg and less than or equal to 400kg; preferably 300kg;

the threshold 2 in the weight range is selected, so that the support can be ensured;

meanwhile, as the hydraulic cylinder 4 needs to bear at least part of the weight of the threshold 2, the maximum stress of the hydraulic cylinder 4 is selected to be larger than a theoretical value so as to ensure the supporting performance and durability of the hydraulic cylinder 4; the maximum force F of the hydraulic cylinder 4 should be such that:

f=g/n×a; wherein G is the weight of a single threshold 2, the unit is kg, n is the number of hydraulic cylinders 4 correspondingly arranged on each threshold 2, and A is a safety coefficient;

in one embodiment of the disclosure, the weight of a single threshold 2 is 300kg, 2 hydraulic cylinders 4 are arranged on each threshold 2, the safety coefficient is 3, and then the maximum stress f=300/2*3 =450 kg of the hydraulic cylinders 4 is calculated, and the maximum stress f=4410n of the hydraulic cylinders 4 is calculated because 1 kg=9.8n;

in another embodiment of the present disclosure, the weight of a single threshold 2 is 250kg, 2 hydraulic cylinders 4 are arranged on each threshold 2, and the safety coefficient is 3, so that the maximum stress f=250/2*3 =375 kg=3675N of the hydraulic cylinders 4;

in yet another embodiment of the present disclosure, the weight of a single threshold 2 is 400kg, 3 hydraulic cylinders 4 are arranged on each threshold 2, the safety coefficient is selected to be 3, and then the maximum stress f=400/3*3 =400 kg=3920n of the hydraulic cylinders 4;

in yet another embodiment of the present disclosure, the weight of a single threshold 2 is 400kg, 2 hydraulic cylinders 4 are arranged for each threshold 2, the safety factor is 3, and the maximum stress f=400/2*3 =600kg=5880N of the hydraulic cylinders 4 is selected.

As can be seen from the above examples, under other conditions, the number of hydraulic cylinders 4 may be selected appropriately according to the weight of a single threshold 2, where the weight of a single threshold 2 is 300kg, 2 hydraulic cylinders 4 are disposed for each threshold 2, and the safety factor selection 3 is a preferred embodiment, where the weight of a single threshold 2 is moderate, and the number of hydraulic cylinders 4 disposed for each threshold 2 is also moderate, so that both the cost and the supporting performance of the threshold 2 are considered;

meanwhile, the cylinder diameter d of the hydraulic cylinder 4 has the following relationship with the maximum stress F of the hydraulic cylinder 4:

F＝π*(d/2) ² * P, where P is the nominal operating pressure of the hydraulic station 7,

from the above formula, it can be deduced that the bore diameter d of the hydraulic cylinder 4 should satisfy:

d=4f/ppi; d is in mm, P is in MPa, and F is in N;

from the above embodiment, the minimum value dmin= 27.49mm of the cylinder diameter d can be calculated; maximum value dmax=34.76 mm of the bore d, since the actual selected bore of the hydraulic cylinder 4 is larger than the theoretical bore, the bore d is rounded up according to the above data, which gives that it should satisfy:

28mm≤d≤35mm；

according to a preferred embodiment of the present disclosure, the cylinder diameter d=30.10 mm of the hydraulic cylinder 4 required for this embodiment is calculated; the cylinder diameter of the hydraulic cylinder 4 required by the embodiment is set to be 32mm by rounding up and calculating the form and position tolerance, namely, under the condition that the weight of a single threshold 2 is 300kg, 2 hydraulic cylinders 4 are arranged for each threshold 2, and the safety coefficient is selected to be 3, the hydraulic cylinder 4 needs to select parameters including the type that the cylinder diameter is 32mm and the maximum stress 4410N.

Further, the hydraulic lifting mechanism is quite perfect after the manual control assembly is arranged, so that electromagnetic control and manual control assemblies of the hydraulic lifting assembly cannot be used under extreme conditions, and the explosion-proof door disclosed by the disclosure loses the protection effect, and the mechanical lifting assembly and the rotary handle are additionally arranged on the explosion-proof door, and the rotary handle is detachably connected with the transmission mechanism of the screw jack so as to avoid blocking pedestrians or vehicles on a road surface and can quickly finish the lifting of the doorsill 2;

the mechanical lifting assembly comprises a conventional screw jack, wherein the screw jack is a mechanical jack which is driven by manpower through a screw pair, and a screw rod or a nut sleeve is used as a jacking piece; the jacking piece is arranged in the accommodating groove and positioned at the inner side of the threshold 2, and one surface of the jacking piece is abutted against the top of the inner side of the threshold 2;

one side of the door sill 2 far away from the door body 1 is provided with a position avoiding hole at a position corresponding to the screw jack, a transmission mechanism of the screw jack is exposed out of the door sill 2 through the position avoiding hole and in a containing groove (not shown in the drawing), and the transmission mechanism is exposed out of the door sill 2, so that a worker can conveniently check the condition of the transmission mechanism, and meanwhile, the worker can conveniently use the screw jack to lift.

Further, the limiting structure on the door body 1 comprises a beam extending along the length direction of the door body 1, the length and the width of the beam correspond to the length and the width of the threshold 2 respectively, the beam is slightly wider than the threshold 2 to ensure that the threshold 2 is in full contact with the beam during abutting, and damage to the beam and the threshold 2 caused by overlarge pressure at the contact position due to overlarge contact area is avoided so as to ensure that the threshold 2 is in perfect abutting connection with the beam after rising; and the side edge that the crossbeam kept away from the door body 1 department downwardly extending is formed with baffle structure, and baffle structure plays supplementary locking's effect, and when threshold 2 and limit structure butt, baffle structure withhold threshold 2, guarantees the stability of butt.

Further, when the lifting mechanism drives the doorsill 2 to enable the doorsill 2 to move upwards to be abutted with the limiting structure, the doorsill 2 always impacts the bottom surface of the doorsill groove, and the contact part of the doorsill 2 and the doorsill groove is easy to wear for a long time, so that the supporting effect is affected; therefore, a layer of buffer cushion is additionally arranged on the top surface of the threshold 2, and a layer of buffer cushion can be optionally arranged on the bottom surface of the threshold groove; EVA foam material can be selected for the buffer layer, soft rubber and the like can also be selected, and the impact force of the threshold 2 can be effectively relieved through the arrangement of the buffer layer, so that the abrasion problem of the threshold 2 and the threshold groove can be effectively avoided.

Further, at least two hydraulic cylinders 4 are configured in each door body 1, when the door sill 2 is lifted to make the door sill 2 contact with the door sill groove, the lifting heights of the hydraulic cylinders 4 are different, so that the pressures of the contact surfaces of the door sill 2 and the door sill groove are different, and further the damage degree of each part of the door sill 2 is different, so that the door sill 2 cannot effectively support the door body 1, and the limiting structure cannot play a limiting role;

therefore add spacing feedback subassembly, spacing feedback subassembly includes a plurality of pressure sensor, pressure sensor sets up in the bottom surface department of threshold groove, and pressure sensor and electromagnetic control case 6 signal connection, the staff can see the pressure between threshold 2 and the threshold groove when operating electromagnetic control case 6 control pneumatic cylinder 4's lift, according to the data that pressure sensor returned, control a certain pneumatic cylinder 4 slightly rise or descend in order to guarantee that each shop pressure is close or equal, and then guarantee that threshold 2 still can support door body 1 effectively after long-time use, limit structure also can play spacing effect always.

Furthermore, the electromagnetic control box 6 can control a single electromagnetic directional valve 5 according to the requirement, taking a double-door type explosion-proof door as an example, one door body 1 is provided with two hydraulic cylinders 4, one electromagnetic directional valve 5 corresponds to one hydraulic cylinder 4, and in the process of raising the doorsill 2, the two hydraulic cylinders 4 in one doorsill 2 need to move at the same speed;

therefore, a stroke feedback assembly is additionally arranged, the stroke feedback assembly comprises a plurality of infrared distance sensors, the infrared distance sensors are arranged on one surface of the piston rod or are arranged on the top surface of the sleeve, the infrared distance sensors are in signal connection with the electromagnetic control box 6, the infrared distance sensors are arranged on the top surface of the piston rod for example, the infrared distance sensors emit infrared light upwards and receive the reflected infrared light, the stroke of the piston rod is calculated according to the receiving time and fed back to the electromagnetic control box 6, and a worker judges whether the piston rod reaches a preset position according to the displayed data;

through the setting of the stroke feedback assembly, the stroke of each hydraulic cylinder 4 can be ensured to be consistent, and then the stroke of each position of the doorsill 2 is ensured to be consistent, and each hydraulic cylinder 4 in the same doorsill 2 keeps the same-speed motion.

Further, since the lifting mechanism is matched with the threshold 2 so that the threshold 2 can support the door body 1, the weight of the door body 1 is basically supported by the threshold 2 and the shell 3, in order to reduce the pressure of the shell 3, as shown in fig. 6, an outer edge 31 is formed on the outer peripheral surface of the shell 3, widening plates 32 are symmetrically arranged on the outer edge 31, and the pressure applied to the unit area of the shell 3 is reduced through the arrangement of the widening plates 32, so that the sinking trend of the shell 3 is reduced; meanwhile, the supporting plate 33 is arranged below the widening plate 32, the widening plate 32 is prevented from being broken when being stressed too much by the supporting plate 33, and meanwhile, the supporting performance of the shell 3 is enhanced.

The number of the door bodies 1 of the explosion-proof door corresponds to the number of the doorsills 2, and if the single door type explosion-proof door is selected, the number of the doorsills 2 corresponds to one; if the double door type explosion door is selected, the number of the doorsills 2 is two correspondingly.

The working process of the explosion door disclosed by the disclosure is as follows:

after the door is closed, the electromagnetic control assembly is controlled to lift the doorsill 2, and due to the design of the baffle structure, the doorsill 2 is abutted with the limiting structure, the baffle structure buckles the doorsill 2, and then the door body 1 is locked, so that the explosion-proof door is closed;

if the electromagnetic control component fails, a manual control component is used, and the operation process is as described above;

if the electromagnetic control assembly and the manual control assembly are invalid, the rotary handle is taken out to be connected with the transmission mechanism, and the mechanical lifting assembly can be used for operating the lifting of the threshold 2.

In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and without being otherwise described, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the claims.

Claims (10)

1. An explosion vent, comprising: the door comprises a door frame, a door body (1), a doorsill (2), a shell (3) and a lifting mechanism;

the door sill (2) is arranged on one side of the door body (1), the shell (3) is buried in the ground, a containing groove is formed in the shell (3), the door sill (2) is arranged in the containing groove in a vertically sliding mode, and the lifting mechanism is linked with the door sill (2) and used for driving the door sill (2) to move up and down;

one end of the door body (1) close to the door frame is rotationally connected with the door frame; the door body (1) is close to one side face of the threshold (2), a limiting structure matched with the threshold (2) is formed at a position corresponding to the uppermost end of the stroke of the threshold (2), and the threshold (2) is abutted with the limiting structure to support the door body (1) when sliding to the uppermost end of the stroke.

2. The explosion door according to claim 1, wherein the lifting mechanism comprises a hydraulic lifting assembly and an electromagnetic control assembly, the hydraulic lifting assembly comprises hydraulic cylinders (4), the number of the hydraulic cylinders (4) is matched with that of the doorsills (2), the doorsills (2) are hollow cuboid, the hydraulic cylinders (4) are arranged in the shell (3) and are located below the doorsills (2), and piston rods of the hydraulic cylinders (4) are connected with inner top surfaces of the doorsills (2);

the electromagnetic control assembly comprises an electromagnetic reversing valve (5) and an electromagnetic control box (6), wherein the electromagnetic reversing valve (5) is respectively connected with the hydraulic cylinder (4) through signals, and the electromagnetic control box (6) is matched with the electromagnetic reversing valve (5) to control the lifting of the hydraulic cylinder (4).

3. The explosion vent as set forth in claim 2, wherein said hydraulic lift assembly further includes a manual control assembly;

the manual control assembly comprises a hydraulic station (7), a manual reversing valve and a reversing handle, wherein the hydraulic station (7) is in linkage with the hydraulic cylinder (4), the reversing handle is connected with the manual reversing valve, the manual reversing valve is connected with the hydraulic station (7), and the reversing handle, the manual reversing valve and the hydraulic station (7) are matched to control lifting of the hydraulic cylinder (4).

4. Explosion door according to claim 2, characterized in that the weight G of the individual door sill (2) satisfies:

250kg≤G≤400kg；

the maximum stress F of the hydraulic cylinder (4) is as follows:

F＝G/n*A；

wherein G is the weight of a single threshold (2), the unit is kg, n is the number of hydraulic cylinders (4) corresponding to each threshold (2), and A is a safety factor;

the cylinder diameter d of the hydraulic cylinder (4) satisfies the following conditions:

wherein F is the maximum stress of the hydraulic cylinder (4), and P is the rated working pressure of the hydraulic station (7).

5. The explosion vent as claimed in claim 1 or 2, wherein the lifting mechanism comprises a mechanical lifting assembly, the mechanical lifting assembly comprises a screw jack and a rotary handle, a jacking piece of the screw jack is arranged in the accommodating groove, one surface of the jacking piece is abutted against the threshold (2), and the rotary handle is detachably connected with a transmission mechanism of the screw jack;

the side, far away from the door body (1), of the doorsill (2) is provided with a clearance hole at a position corresponding to the screw jack, and a transmission mechanism of the screw jack is partially exposed out of the doorsill (2) and in the accommodating groove through the clearance hole.

6. The explosion vent as set forth in claim 5, wherein said limit structure includes a cross member; the beam is far away from a side edge of the door body (1) and downwards extends to form a baffle structure, and a threshold groove matched with the threshold (2) is formed between the baffle structure and the door body.

7. The explosion door according to claim 6, further comprising a cushion pad arranged at the top surface of the rocker (2) and/or the bottom surface of the rocker groove.

8. The explosion vent as set forth in claim 2, further comprising a limit feedback assembly including a plurality of pressure sensors disposed at the bottom surface of the threshold groove and in signal communication with the electromagnetic control box (6).

9. The explosion door according to claim 2, further comprising a travel feedback assembly comprising a number of infrared distance sensors, each of which is adapted to each of the hydraulic cylinders (4) and which is in signal connection with the electromagnetic control box (6).

10. Explosion vent according to claim 1, wherein an outer edge (31) is formed on the outer peripheral surface of the housing (3), a widening plate (32) is symmetrically arranged on the outer edge (31), and a supporting plate (33) is arranged below the corresponding position of the widening plate (32) on the housing (3).