CN212927595U - Explosion-proof door frame - Google Patents

Abstract

The utility model relates to an explosion-proof door frame, including the door frame, the door leaf, set up the ventilation hole on the lateral wall that the door leaf is close to door frame one side, set up the mounting hole on the lateral wall that the door leaf kept away from door frame one side, be fixed in the fixed block on the door leaf, the linking arm of being connected and the fixed plate body of one end of keeping away from the fixed block with the linking arm are rotated to the fixed block, the position of mounting hole corresponds with the position in ventilation hole, mounting hole and ventilation hole intercommunication, and the cross sectional area of mounting hole is greater than the cross sectional area of plate body, be fixed with the fixed plate on the bottom surface of plate body, the perforation has been seted up on the position that the door leaf corresponds with the fixed plate, install chucking spare on the. This application has avoided the plate body to take place the phenomenon of bounce-back after receiving shock wave and striking the door leaf through setting up chucking spare to the dust of having avoided producing by the explosion gets into the indoor condition of engineering from the ventilation hole.

Description

Explosion-proof door frame

Technical Field

The application relates to the technical field of civil air defense equipment, in particular to an explosion-proof door frame.

Background

The explosion-proof wave valve is a protective ventilation device which is used for ensuring uninterrupted ventilation in the engineering under the condition of suffering from air attack in civil air defense engineering, and is divided into a suspension swing type valve and a rubber tube type valve according to different materials. The main part is steel structure, can automatic closure in the twinkling of an eye that suffers from the shock wave, and the inside ventilation equipment of protection engineering does not suffer destruction. A suspension plate door is arranged on the outer side of a vent of a general suspension pendulum type explosion-proof wave valve, and the suspension plate door covers the vent after receiving shock waves to block the propagation of the shock waves.

The existing Chinese patent with publication number CN209129516U discloses a suspension plate and a suspension type explosion-proof wave valve special for the explosion-proof wave valve, which comprise a rotating rod; the plate body is arranged at one end of the rotating rod; and the reinforcing piece is arranged on the surface of one side of the plate body, which is close to the shock wave, and is a plurality of reinforcing ribs which are welded or integrally formed with the plate body, so that the purposes of high structural strength and difficult deformation of the suspension plate are achieved.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the plate body receives the blast wave of explosion and receives the effect of blockking of door leaf after, the elastic component on the door leaf produces outside effort to the plate body for the plate body takes place the bounce-back phenomenon easily, and the dust that produces because the explosion is then easy to get into the engineering room from the ventilation hole on the door leaf, and makes the indoor air of engineering suffer the pollution.

SUMMERY OF THE UTILITY MODEL

In order to avoid the plate body to take place the phenomenon of bounce-back after receiving shock wave and striking the door leaf to avoid the dust that produces by the explosion to get into the indoor condition of engineering from the ventilation hole, this application provides an explosion-proof door frame.

The application provides an explosion-proof door frame adopts following technical scheme:

an explosion-proof door frame comprises a door frame, a door leaf hinged on the door frame, a ventilation hole arranged on the side wall of the door leaf close to the door frame, a mounting hole arranged on the side wall of the door leaf far away from the door frame, a fixed block fixed on the position of the door leaf close to the top wall in the mounting hole, a connecting arm rotatably connected with the fixed block, and a plate body fixed at one end of the connecting arm far away from the fixed block and used for covering the ventilation hole, the position of the mounting hole corresponds to the position of the vent hole, the mounting hole is communicated with the vent hole, the cross section area of the mounting hole is larger than that of the plate body, a fixing plate is fixed on the bottom surface of the plate body, the door frame is characterized in that a through hole is formed in the position, corresponding to the fixed plate, of the door leaf, a clamping piece is installed on the position, corresponding to the through hole, of the fixed plate, and the clamping piece penetrates through the through hole and then is abutted against the side wall, close to the door frame, of the door leaf.

Through adopting above-mentioned technical scheme, in normal use, the plate body is in the open mode to this is convenient for the indoor circulation of air of engineering. When the plate body receives the shock wave of explosion, the plate body is to the side motion of being close to the door frame, the lateral wall butt of keeping away from door frame one side until the lateral wall that the plate body is close to door frame one side and mounting hole, at this in-process, chucking spare runs through the perforation, afterwards, chucking spare and door leaf are close to the lateral wall of door frame one side and support tightly, with this make to have stable connection effect between fixed plate and the door leaf, avoided the plate body to receive the shock wave and bump the phenomenon that takes place the bounce-back behind the door leaf, thereby avoid the dust that produces by the explosion from the indoor condition of ventilation hole entering engineering, make the dust that the explosion produced be difficult to get into the engineering from the ventilation hole indoor.

Preferably, the chucking spare includes and is close to the fixed first dead lever of the lateral wall of door frame one side with the fixed plate, set up in first dead lever and keep away from the right angle trapezoidal piece one of fixed plate one end, be close to the fixed second dead lever of the lateral wall of door frame one side with the fixed plate, set up in the right angle trapezoidal piece two of fixed plate one end and set up in the spring between right angle trapezoidal piece one and right angle trapezoidal piece two are kept away from to the second dead lever, the surface that right angle trapezoidal piece one side was kept away from to right angle trapezoidal piece one side and the surface that right angle trapezoidal piece one side was kept away from to right angle trapezoidal piece two are the inclined plane, set up the first spout of being connected with first dead lever sliding on the lateral wall that right angle trapezoidal piece one side is close to fixed plate one side, set up the second spout of being connected with the second dead lever sliding on the lateral wall that right angle trapezoidal piece one is close to fixed plate one Be less than fenestrate length, the width that fixed plate side surface was kept away from to the width and the width that fixed plate side surface was kept away from to right angle trapezoidal piece two of right angle trapezoidal piece one side all is less than fenestrate width, the both ends of spring are close to the lateral wall of right angle trapezoidal piece one side, right angle trapezoidal piece two near the lateral wall of right angle trapezoidal piece one side with right angle trapezoidal piece one respectively and fix.

Through adopting above-mentioned technical scheme, receive the shock wave back of explosion when the plate body, the plate body is to the one side motion that is close to the door frame, the inclined plane as right angle trapezoidal piece one and the inclined plane of right angle trapezoidal piece two arrive the perforation department and receive the lateral wall extrusion of perforation both sides, the spring contracts gradually, when passing the perforation completely with right angle trapezoidal piece two until right angle trapezoidal piece one, because the elastic action of spring, make right angle trapezoidal piece one and right angle trapezoidal piece two reconversion with this, at this moment, right angle trapezoidal piece one, under the mating action of spring and right angle trapezoidal piece two, avoided right angle trapezoidal piece one and right angle trapezoidal piece two reverse to pass the fenestrate condition, and then avoided the plate body to take place the phenomenon of bounce-back after receiving shock wave and striking door leaf.

Preferably, a first limiting block is fixed at one end, away from the fixed plate, of the first fixing rod, a third sliding groove communicated with the first sliding groove and connected with the first limiting block in a sliding mode is formed in the first right-angle trapezoid block, a second limiting block is fixed at one end, away from the fixed plate, of the second fixing rod, and a fourth sliding groove communicated with the second sliding groove and connected with the second limiting block in a sliding mode is formed in the second right-angle trapezoid block.

By adopting the technical scheme, the first limiting block is arranged and connected with the third sliding groove in a sliding manner, so that the situation that the first fixing rod is separated from the first sliding groove is avoided; through setting up the second stopper, the second stopper slides with the fourth spout and is connected to this condition that has avoided the second dead lever to break away from the second spout.

Preferably, the distance between the surface of the first right-angle trapezoidal block close to one side of the fixing plate and the distance between the surface of the second right-angle trapezoidal block close to one side of the fixing plate and the fixing plate are both greater than or equal to the thickness of the door leaf.

Through adopting above-mentioned technical scheme to this is convenient for first dead lever and second dead lever pass the perforation completely, is favorable to right angle trapezoidal piece one, spring and right angle trapezoidal piece two mating reactions, and plays good chucking effect to the fixed plate.

Preferably, a first jack is formed on the inclined surface of the first right-angle trapezoidal block, and a second jack is formed on the inclined surface of the second right-angle trapezoidal block.

Through adopting above-mentioned technical scheme, through setting up first jack and second jack to this be convenient for the staff inserts first jack and second jack respectively with two fingers in, and the application of force simultaneously, make right angle trapezoidal piece one and right angle trapezoidal piece two be close to each other, the spring contracts gradually, thereby be convenient for right angle trapezoidal piece one and right angle trapezoidal piece two reverse perforation of passing, so that the staff opens the baffle and ventilates.

Preferably, an annular rubber sheet is fixed on the inner side wall of the mounting hole close to one side of the door frame.

Through adopting above-mentioned technical scheme, the annular sheet rubber adopts rubber materials to make, has good elastic property, through setting up the annular sheet rubber to this has played good cushioning effect to the baffle, has reduced the collision damage that produces between the mounting hole inner wall of baffle and door leaf.

Preferably, an L-shaped plate is fixed to a position, close to the inner bottom wall of the mounting hole, of a side wall, far away from the door frame, of the door leaf, and a limiting plate is fixed to a side wall, far away from the door leaf, of the L-shaped plate.

Through adopting above-mentioned technical scheme, through setting up L shaped plate and limiting plate to this has played good limiting displacement to the baffle, has avoided the baffle to excessively open and shut because of unrestricted phenomenon.

Preferably, a rubber plate is fixed on the side wall of the limiting plate close to one side of the door leaf.

Through adopting above-mentioned technical scheme, the rubber slab adopts rubber materials to make, has good elasticity performance, through setting up the rubber slab to this has played good guard action to the baffle, has reduced the collision damage that produces between baffle and the limiting plate.

In summary, the present application includes at least one of the following beneficial technical effects:

in the application, when the plate body is subjected to the impact wave of explosion, the plate body moves to one side close to the door frame, and in the process, the clamping piece penetrates through the through hole and is abutted against the side wall of the door leaf close to one side of the door frame, so that a stable connecting effect is achieved between the fixing plate and the door leaf, the phenomenon that the plate body rebounds after being subjected to the impact wave and impacting the door leaf is avoided, the situation that dust generated by explosion enters the engineering room from the air vent is avoided, the dust generated by explosion is difficult to enter the engineering room from the air vent, and the air in the engineering room is kept clean;

in the application, when the plate body is subjected to the shock wave of explosion, the plate body moves towards one side close to a door frame, when the inclined plane of the first right-angle trapezoidal block and the inclined plane of the second right-angle trapezoidal block reach a perforation position and are extruded by the side walls of two sides of the perforation, the spring gradually contracts until the first right-angle trapezoidal block and the second right-angle trapezoidal block completely pass through the perforation, the first right-angle trapezoidal block and the second right-angle trapezoidal block recover from the original state due to the elastic action of the spring, and at the moment, under the matching action of the first right-angle trapezoidal block, the first spring and the second right-angle trapezoidal block, the situation that the first right-angle trapezoidal block and the second right-angle trapezoidal block reversely pass through the perforation is avoided, and the phenomenon that the plate body;

in this application, through setting up first jack and second jack to this in the staff inserts first jack and second jack respectively with two fingers, and the application of force simultaneously, make right angle trapezoidal piece one and right angle trapezoidal piece two be close to each other, the spring contracts gradually, thereby be convenient for right angle trapezoidal piece one and right angle trapezoidal piece two reverse perforation of passing, so that the staff opens the baffle and ventilates.

Drawings

Fig. 1 is a schematic structural view of an explosion-proof doorframe according to an embodiment of the present application.

Fig. 2 is a partial structural sectional view of an explosion-proof door frame according to an embodiment of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Description of reference numerals: 1. a door frame; 2. a door leaf; 21. a vent hole; 22. mounting holes; 221. an annular rubber sheet; 23. a fixed block; 231. a connecting arm; 24. an L-shaped plate; 241. a limiting plate; 2411. a rubber plate; 25. perforating; 3. a plate body; 31. a fixing plate; 4. a retainer; 41. a first fixing lever; 411. a first stopper; 42. a first right-angle trapezoidal block; 421. a first chute; 422. a third chute; 423. a first jack; 43. a second fixing bar; 431. a second limiting block; 44. a right-angle trapezoidal block II; 441. a second chute; 442. a fourth chute; 443. a second jack; 45. a spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses explosion-proof door frame 1. Referring to fig. 1, this explosion-proof door frame 1 includes door frame 1 and door leaf 2, and door frame 1 is the square frame structure of vertical setting, and door leaf 2 is rectangular plate structure, and door leaf 2 and door frame 1 parallel arrangement, and door leaf 2 articulates on door frame 1 for closed door frame 1.

Referring to fig. 2, a vent hole 21 and a mounting hole 22 are formed in the door leaf 2, the cross section of the vent hole 21 and the cross section of the mounting hole 22 are rectangular, the vent hole 21 is formed in a side wall, close to the door frame 1, of the door leaf 2, the mounting hole 22 is formed in a side wall, far away from the door frame 1, of the door leaf 2, the position of the mounting hole 22 corresponds to the position of the vent hole 21, the mounting hole 22 is communicated with the vent hole 21, and the cross sectional area of the mounting hole 22 is larger than that of the plate body 3.

Referring to fig. 1, a fixing block 23 is fixed on a side wall of the door leaf 2 far from the door frame 1, the fixing block 23 is a rectangular block structure, the fixing block 23 is arranged at a position of the door leaf 2 close to an inner top wall of the mounting hole 22, and the fixing blocks 23 are arranged in groups. Be provided with connecting arm 231 between two fixed blocks 23 that set up in groups, the cross section of connecting arm 231 is the rectangle, and the one end and two fixed blocks 23 of connecting arm 231 all rotate to be connected, and the other end of connecting arm 231 is to the one side downwardly extending that is close to door leaf 2.

Referring to fig. 1, a plate body 3 is arranged on the connecting arm 231, the plate body 3 is of a rectangular plate-shaped structure, one end of the connecting arm 231, which is far away from the fixing block 23, and the side wall, which is far away from the door frame 1 side, of the plate body 3 are fixed at a position close to the top of the plate body 3, as shown in fig. 2, the cross-sectional area of the plate body 3 is larger than the cross-sectional area of the vent hole 21 and smaller than the cross-sectional area of the mounting hole 22, so. In normal use, the plate body 3 is in an open state, so that air in the engineering room can circulate through the vent hole 21.

Referring to fig. 2, be equipped with annular sheet rubber 221 in the mounting hole 22, annular sheet rubber 221 is square annular slice structure, the lateral wall that annular sheet rubber 221 is close to door frame 1 one side is fixed with the inside wall that mounting hole 22 is close to door frame 1 one side, annular sheet rubber 221 adopts rubber materials to make, good elastic property has, through setting up annular sheet rubber 221, when the engineering outdoor shock wave that suffers, plate body 3 receives the easy automatic closure of shock wave effect, when plate body 3 is close to the lateral wall and the contact of annular sheet rubber 221 of door leaf 2 one side, annular sheet rubber 221 unloads some, with this impact force has played good guard action to plate body 3, collision damage between plate body 3 and the door leaf 2 has been reduced.

Referring to fig. 1 and 2, an L-shaped plate 24 is disposed on a side wall of the door leaf 2 away from the door frame 1, the cross section of the L-shaped plate 24 is L-shaped, and a side wall of a vertical portion of the L-shaped plate 24 close to the door frame 1 is fixed to a position of the door leaf 2 close to the inner bottom wall of the mounting hole 22. Be provided with limiting plate 241 on the L shaped plate 24, limiting plate 241 is the rectangle platelike structure that the slope set up, and the lateral wall that limiting plate 241 is close to door leaf 2 one side is fixed with the one end that L shaped plate 24 kept away from door leaf 2, and when plate body 3 was in the open mode, limiting plate 241 had played good limiting displacement to plate body 3, had avoided plate body 3 angle of opening and shutting too big and be difficult to the automatic closed condition when receiving the impulse wave.

Referring to fig. 2, be provided with rubber slab 2411 on the limiting plate 241, rubber slab 2411 is the rectangular plate structure, and the lateral wall that rubber slab 2411 kept away from door frame 1 one side is fixed with the lateral wall that limiting plate 241 is close to door frame 1 one side, and rubber slab 2411 adopts rubber materials to make, has good elastic performance, through setting up rubber slab 2411 to this makes flexible contact between limiting plate 241 and the plate body 3, has reduced the collision damage that plate body 3 produced between the in-process of opening and shutting and limiting plate 241.

Referring to fig. 2, a fixing plate 31 is provided on the plate body 3, the fixing plate 31 has a rectangular plate-like structure, and an upper surface of the fixing plate 31 is fixed to a bottom surface of the plate body 3. The door 2 is provided with a through hole 25, and the position of the through hole 25 on the door 2 corresponds to the position of the fixed plate 31.

Referring to fig. 2, the fastening member 4 is mounted on the fixing plate 31, and the position of the fastening member 4 corresponds to the position of the through hole 25. referring to fig. 3, the fastening member 4 includes a first fixing bar 41, a first right-angled trapezoidal block 42, a second fixing bar 43, a second right-angled trapezoidal block 44, and a spring 45. The first fixing rod 41 is a square rod-shaped structure, and one end of the first fixing rod away from the door 2 is fixed to a side wall of the fixing plate 31 close to the door frame 1. The cross section of the right trapezoid block 42 is right trapezoid, which is disposed at one end of the first fixing rod 41 far away from the fixing plate 31, and the side wall of the right trapezoid block 42 near one side of the fixing plate 31 is provided with a first sliding groove 421 for the sliding connection of the first fixing rod 41. The second fixing rod 43 is a square rod-shaped structure, one end of the second fixing rod 43 away from the door leaf 2 is fixed to the side wall of the fixing plate 31 close to the door frame 1, and the distance between the side wall of the second fixing rod 43 away from the first fixing rod 41 and the side wall of the first fixing rod 41 away from the second fixing rod 43 is smaller than the length of the through hole 25. The cross section of the right-angle trapezoidal block 44 is right-angled trapezoid, the right-angle trapezoidal block is arranged at one end, far away from the fixing plate 31, of the second fixing rod 43, the second sliding groove 441 for the second fixing rod 43 to slide and connect is formed in the side wall, close to one side of the fixing plate 31, of the right-angle trapezoidal block 44, the surface, far away from one side of the right-angle trapezoidal block 44, of the right-angle trapezoidal block 42 and the surface, far away from one side of the right-angle trapezoidal block 42, of the right-angle. The spring 45 is arranged between the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44, one end of the spring 45 is fixed to the side wall, close to one side of the second right-angle trapezoidal block 44, of the first right-angle trapezoidal block 42, and the other end of the spring 45 is fixed to the side wall, close to one side of the first right-angle trapezoidal block 42, of the second right-angle trapezoidal block 44. When the spring 45 is in a normal state, the sum of the length of the surface of the first right-angled trapezoidal block 42 away from the fixing plate 31 and the length of the surface of the second right-angled trapezoidal block 44 away from the fixing plate 31 is less than the length of the through hole 25, the width of the surface of the first right-angled trapezoidal block 42 away from the fixing plate 31 and the width of the surface of the second right-angled trapezoidal block 44 away from the fixing plate 31 are less than the width of the through hole 25, when the plate 3 is subjected to shock waves generated by explosion, the fixing plate 31, the first fixing rod 41, the first right-angled trapezoidal block 42, the second fixing rod 43 and the second right-angled trapezoidal block 44 move synchronously with the plate 3, and after the inclined surfaces of the first right-angled trapezoidal block 42 and the second right-angled trapezoidal block 44 abut against the side walls on both sides of the through hole 25, the spring 45 is compressed and contracted by the first right-angled trapezoidal, until right angle trapezoidal piece 42 and right angle trapezoidal piece two 44 pass perforation 25 completely, afterwards, under spring 45's spring action, right angle trapezoidal piece 42 and right angle trapezoidal piece two 44 resume the normal position, the lateral wall that right angle trapezoidal piece 42 is close to fixed plate 31 one side and right angle trapezoidal piece two 44 are close to fixed plate 31 one side all supports tightly with the lateral wall that fixed plate 31 is close to door frame 1 one side, thereby avoided plate body 3 to take place the condition that the secondary kick-backs, the effectual outdoor dust of having avoided the engineering gets into the indoor condition of engineering by ventilation hole 21, make the indoor air of engineering keep clean.

Referring to fig. 3, a first limiting block 411 is disposed on the first fixing rod 41, the first limiting block 411 is a rectangular block structure, and as shown in fig. 2, a side wall of the first limiting block 411 close to one side of the fixing plate 31 is fixed to one end of the first fixing rod 41 far away from the fixing plate 31, and a third sliding groove 422 slidably connected to the first limiting block 411 is disposed in the right-angled trapezoid block 42. The cross section of the third sliding chute 422 is rectangular, the extending direction of the third sliding chute 422 is parallel to the extending direction of the first sliding chute 421, and the third sliding chute 422 is communicated with the first sliding chute 421. The second fixing rod 43 is provided with a second stopper 431, the second stopper 431 is of a rectangular block structure, the side wall of the second stopper 431 close to one side of the fixing plate 31 is fixed with one end of the second fixing rod 43 far away from the fixing plate 31, and a fourth sliding groove 442 connected with the second stopper 431 in a sliding manner is formed in the right-angled trapezoid block 44. The cross section of the fourth sliding slot 442 is rectangular, the extending direction of the fourth sliding slot 442 is parallel to the extending direction of the second sliding slot 441, and the fourth sliding slot 442 is communicated with the second sliding slot 441. Through the arrangement of the first limiting block 411 and the third sliding groove 422, the first fixing rod 41 is well limited, and the situation that the first fixing rod 41 is separated from the first sliding groove 421 in the movement process of the right-angled trapezoidal block 42 is avoided, so that the clamping piece 4 is kept with good structural stability in the use process. Through the arrangement of the second limiting block 431 and the fourth sliding groove 442, the second fixing rod 43 is well limited, and the situation that the second fixing rod 43 is separated from the second sliding groove 441 in the moving process of the right-angled trapezoidal block II 44 is avoided, so that the clamping piece 4 is kept with good structural stability in the using process.

Referring to fig. 2 and 3, the distance between the surface of the first right-angle trapezoidal block 42 close to the fixing plate 31 and the distance between the surface of the second right-angle trapezoidal block 44 close to the fixing plate 31 and the fixing plate 31 are both greater than or equal to the thickness of the door leaf 2, so that the first fixing rod 41 and the second fixing rod 43 completely penetrate through the through hole 25, the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44 are bounced off under the elastic force of the spring 45, the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44 cooperate, firm connection between the baffle, the fixing plate 31 and the door leaf 2 is achieved, and the situation that the plate 3 rebounds secondarily is prevented.

Referring to fig. 3, first jack 423 has been seted up on the inclined plane of right angle trapezoidal piece one 42, and second jack 443 has been seted up on the inclined plane of right angle trapezoidal piece two 44, it is shown in combination fig. 2, through setting up first jack 423 and second jack 443, so that the staff inserts two fingers respectively in first jack 423 and the second jack 443, thereby be convenient for the staff application of force simultaneously, and press right angle trapezoidal piece one 42 and right angle trapezoidal piece two 44, so that make right angle trapezoidal piece one 42 and right angle trapezoidal piece two 44 follow and perforate 25 in the reverse wearing out, be favorable to the staff to open plate body 3 and ventilate.

The implementation principle of an explosion-proof wave door frame 1 of the embodiment of the application is as follows: in normal use, the plate body 3 is in an open state, so that air circulation in a project room is facilitated. When the plate body 3 receives the shock wave of explosion, the plate body 3 moves to one side close to the door frame 1 until the lateral wall of the plate body 3 close to one side of the door frame 1 and the lateral wall butt of the mounting hole 22 far away from one side of the door frame 1, in the process, the clamping piece 4 penetrates through the through hole 25, subsequently, the clamping piece 4 and the door leaf 2 are close to the lateral wall of one side of the door frame 1 and abut tightly, so that a stable connection effect is achieved between the fixing plate 31 and the door leaf 2, the phenomenon that the plate body 3 rebounds after receiving the shock wave and striking the door leaf 2 is avoided, so that the situation that dust generated by explosion enters the engineering room from the ventilation hole 21 is avoided, the dust generated by explosion is difficult to enter the engineering room from the ventilation hole 21, and further.

In the scheme, when the plate body 3 moves to one side close to the doorframe 1 after receiving shock waves generated by explosion, in the process, the fixing plate 31, the first fixing rod 41, the first right-angle trapezoidal block 42, the second fixing rod 43 and the second right-angle trapezoidal block 44 all move synchronously with the plate body 3, after the inclined surface of the first right-angle trapezoidal block 42 and the inclined surface of the second right-angle trapezoidal block 44 are respectively abutted to the side walls at two sides of the perforation 25, the spring 45 is extruded by the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44 to shrink until the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44 completely penetrate through the perforation 25, then, under the elastic force action of the spring 45, the first right-angle trapezoidal block 42 and the second right-angle trapezoidal block 44 restore to the original positions, the side wall of the first right-angle trapezoidal block 42 close to one side of the fixing plate 31 and the side wall of the second right-angle, thereby avoided plate body 3 to take place the condition of secondary resilience, the effectual outdoor dust of having avoided the engineering gets into the indoor condition of engineering by ventilation hole 21 for the indoor air of engineering keeps clean.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An explosion-proof wave door frame comprises a door frame (1), a door leaf (2) hinged on the door frame (1), a vent hole (21) arranged on the side wall of the door leaf (2) close to one side of the door frame (1), a mounting hole (22) arranged on the side wall of the door leaf (2) far away from one side of the door frame (1), a fixed block (23) fixed on the position of the door leaf (2) close to the inner top wall of the mounting hole (22), a connecting arm (231) rotatably connected with the fixed block (23), and a plate body (3) fixed at one end of the connecting arm (231) far away from the fixed block (23) and used for covering the vent hole (21), the position of the mounting hole (22) corresponds to the position of the vent hole (21), the mounting hole (22) is communicated with the vent hole (21), and the cross sectional area of the mounting hole (22) is larger than that of the plate body (3), and the mounting structure is characterized in that: be fixed with fixed plate (31) on the bottom surface of plate body (3), seted up on door leaf (2) and the position that fixed plate (31) correspond and perforated (25), install chucking spare (4) on fixed plate (31) and the position that perforated (25) correspond, chucking spare (4) run through behind perforation (25) and door leaf (2) are close to the lateral wall on one side of door frame (1) and support tightly.

2. An explosion vent frame as set forth in claim 1, wherein: the clamping piece (4) comprises a first fixing rod (41) fixed with the side wall of one side, close to the door frame (1), of the fixing plate (31), a first right-angle trapezoidal block (42) arranged at one end, far away from the fixing plate (31), of the first fixing rod (41), a second fixing rod (43) fixed with the side wall of one side, close to the door frame (1), of the fixing plate (31), a second right-angle trapezoidal block (44) arranged at one end, far away from the fixing plate (31), of the second fixing rod (43), and a spring (45) arranged between the first right-angle trapezoidal block (42) and the second right-angle trapezoidal block (44), the surface of one side, far away from the second right-angle trapezoidal block (44), of the first right-angle trapezoidal block (42) and the surface of one side, far away from the first right-angle trapezoidal block (42) of the second right-angle trapezoidal block (44) are inclined surfaces, a first sliding groove (421) connected with the first fixing rod, the lateral wall that right angle trapezoidal piece two (44) is close to fixed plate (31) one side is seted up on and is slided second spout (441) of being connected with second dead lever (43), the length that right angle trapezoidal piece (42) kept away from fixed plate (31) one side surface and right angle trapezoidal piece two (44) keep away from fixed plate (31) one side surface's length sum is less than the length of perforation (25), the width that fixed plate (31) one side surface was kept away from in right angle trapezoidal piece one (42) and right angle trapezoidal piece two (44) keep away from fixed plate (31) one side surface's width all is less than the width of perforation (25), the both ends of spring (45) are fixed with the lateral wall that right angle trapezoidal piece one (42) is close to right angle trapezoidal piece two (44) one side, lateral wall that right angle trapezoidal piece two (44) is close to right angle trapezoidal piece one (42) one side.

3. An explosion vent frame as set forth in claim 2, wherein: one end, far away from fixed plate (31), of first dead lever (41) is fixed with first stopper (411), set up in right angle trapezoidal piece (42) with first spout (421) intercommunication and with first stopper (411) third spout (422) of sliding connection, the one end, far away from fixed plate (31), of second dead lever (43) is fixed with second stopper (431), set up in right angle trapezoidal piece two (44) and communicate with second spout (441) and with second stopper (431) fourth spout (442) of sliding connection.

4. An explosion vent frame as set forth in claim 2, wherein: the distance between the surface of the first right-angle trapezoidal block (42) close to one side of the fixing plate (31) and the distance between the surface of the second right-angle trapezoidal block (44) close to one side of the fixing plate (31) and the fixing plate (31) are both larger than or equal to the thickness of the door leaf (2).

5. An explosion vent frame as set forth in claim 2, wherein: a first jack (423) is formed on the inclined surface of the first right-angle trapezoidal block (42), and a second jack (443) is formed on the inclined surface of the second right-angle trapezoidal block (44).

6. An explosion vent frame as set forth in claim 1, wherein: an annular rubber sheet (221) is fixed on the inner side wall of the mounting hole (22) close to one side of the door frame (1).

7. An explosion vent frame as set forth in claim 1, wherein: an L-shaped plate (24) is fixed on the position, close to the inner bottom wall of the mounting hole (22), of the side wall, far away from the door frame (1), of the door leaf (2), and a limiting plate (241) is fixed on the side wall, far away from the door leaf (2), of the L-shaped plate (24).

8. An explosion vent frame as set forth in claim 7, wherein: and a rubber plate (2411) is fixed on the side wall of the limiting plate (241) close to one side of the door leaf (2).

Images