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CN-224215365-U - Flue negative pressure spring explosion door

CN224215365UCN 224215365 UCN224215365 UCN 224215365UCN-224215365-U

Abstract

The utility model discloses a flue negative pressure spring explosion-proof door which comprises an explosion-proof door frame, wherein a supporting ring is fixedly connected to the surface of the upper end side of the explosion-proof door frame, a plurality of groups of limiting rods are fixedly connected to the upper surface of the supporting ring, a cover plate is sleeved on the side surface of the limiting rods, the limiting rings are arranged above the cover plate and are in threaded connection with the limiting rods through mounting nuts, a buffer component is arranged below the limiting rings, a supporting plate is fixedly connected to the upper surface of the limiting rings, a transverse plate is fixedly connected to one end of the supporting plate, a sliding rod is connected to the inner portion of the transverse plate in a sliding mode, a top plate is fixedly connected to the lower end of the sliding rod, and a limiting block is fixedly connected to the upper end of the sliding rod. The problem of traditional flue explosion vent simple structure when receiving explosion impact causes the explosion vent to take place to warp easily to damage is solved, the stability in use of explosion vent has been improved, avoids causing the unable condition of using once more of explosion vent, has prolonged the life of explosion vent, has reduced certain economic loss simultaneously.

Inventors

  • MA DONGMING
  • WANG JUANJUAN
  • JI CHANGLING
  • LI SHUAI

Assignees

  • 鼎煌工业科技泰州有限公司

Dates

Publication Date
20260508
Application Date
20250422

Claims (6)

  1. 1. A flue negative pressure spring explosion door comprises an explosion-proof door frame (1) and is characterized in that a supporting ring (102) is fixedly connected to the side surface of the upper end of the explosion-proof door frame (1), a plurality of groups of limiting rods (103) are fixedly connected to the upper surface of the supporting ring (102), a cover plate (2) is sleeved on the side surface of the limiting rods (103), a limiting ring (3) is arranged above the cover plate (2), the limiting ring (3) is in threaded connection with the limiting rods (103) through nuts I (104), a buffer component is arranged below the limiting ring (3), a supporting plate (301) is fixedly connected to the upper surface of the limiting ring (3), a transverse plate (302) is fixedly connected to one end of the supporting plate (301), a sliding rod (305) is fixedly connected to the inner portion of the transverse plate (302), a top plate (307) is fixedly connected to the lower end of the sliding rod (305), a limiting block (303) is fixedly connected to the upper end of the sliding rod (305), and a mounting flange (101) is fixedly connected to the lower end of the explosion-proof door frame (1).
  2. 2. The negative pressure spring explosion door for the flue is characterized in that the buffer assembly comprises a spring I (106), the spring I (106) is sleeved on the side surface of the limiting rod (103), the upper end of the spring I (106) is rotatably connected with a nut II (105), and the nut II (105) is in threaded connection with the side surface of the limiting rod (103).
  3. 3. The negative pressure spring explosion vent of claim 1, wherein a spring II (304) is sleeved on the side surface of the sliding rod (305), the upper end of the spring II (304) is fixedly connected with the lower surface of the transverse plate (302), the lower end of the spring II (304) is fixedly connected with the upper surface of the top plate (307), and a reinforcing plate (306) is fixedly connected with the upper surface of the top plate (307).
  4. 4. The negative pressure spring explosion door for the flue is characterized in that a sealing ring (107) is fixedly connected to the inner wall of the explosion-proof door frame (1), a lantern ring (201) is fixedly connected to the lower surface of the cover plate (2), and the outer diameter of the lantern ring (201) is the same as the inner diameter of the sealing ring (107).
  5. 5. The negative pressure spring explosion vent for the flue is characterized in that a sealing gasket (202) is fixedly connected to the surface of the lower surface of the collar (201), a sealing convex ring is fixedly connected to the upper surface of the sealing gasket (202), a groove (108) is formed in the lower surface of the sealing ring (107), and the groove (108) corresponds to the sealing convex ring on the upper surface of the sealing gasket (202).
  6. 6. The negative pressure spring explosion door for the flue is characterized in that the spring I (106) and the limit rod (103) are coaxially arranged, and the coaxiality error of the spring I (106) and the limit rod (103) is not more than +/-0.5 mm.

Description

Flue negative pressure spring explosion door Technical Field The utility model relates to the technical field of spring explosion vents, in particular to a negative pressure spring explosion vent of a flue. Background The normal operation of the boiler flue gas side of the thermal power plant is a negative pressure working condition, when the boiler knocks or a steam-water pipeline leaks, the flue gas side negative pressure working condition instantaneously becomes positive pressure, the flue gas side pressure is caused to increase from hundreds of times to thousands of times, the pressure of the flue gas side exceeds the pressure bearing capacity of a flue, and finally equipment is damaged, so that an explosion door of the flue is arranged for preventing equipment from being damaged. The existing flue explosion vent is generally plugged by gravity, the connecting structure between the explosion vent and the installation pipeline is simple, the structure of the explosion vent is easy to deform and damage when the explosion impact is received, the door frame, the door plate and other parts are easy to bend and break when the explosion impact is received, the normal pressure relief and resetting functions of the explosion vent are affected, and the explosion vent cannot be reused when serious, so that certain economic loss is caused. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the flue negative pressure spring explosion-proof door, which solves the problem that the traditional flue explosion-proof door is easy to deform and damage when being subjected to explosion impact, so that the use stability of the explosion-proof door is improved, the situation that the explosion-proof door cannot be reused is avoided, the service life of the explosion-proof door is prolonged, and meanwhile, certain economic loss is reduced. The technical scheme is that the flue negative pressure spring explosion-proof door is characterized in that a supporting ring is fixedly connected to the upper end side surface of an explosion-proof door frame, a plurality of groups of limiting rods are fixedly connected to the upper surface of the supporting ring, a cover plate is sleeved on the side surface of each limiting rod, a limiting ring is arranged above the cover plate, the limiting rings are in threaded connection with the limiting rods through nuts I, a buffer component is arranged below the limiting rings, a supporting plate is fixedly connected to the upper surface of each limiting ring, one end of each supporting plate is fixedly connected with a transverse plate, a sliding rod is connected to the inside of each transverse plate in a sliding mode, a top plate is fixedly connected to the lower end of each sliding rod, a limiting block is fixedly connected to the upper end of each sliding rod, and a mounting flange is fixedly connected to the lower end of each explosion-proof door frame. Preferably, the buffer component comprises a spring I, the spring I is sleeved on the side surface of the limiting rod, the upper end of the spring I is rotationally connected with a nut II, and the nut II is in threaded connection with the side surface of the limiting rod. Preferably, the side surface cover of slide bar is equipped with spring II, and spring II's upper end and the lower fixed surface of diaphragm are connected, spring II's lower extreme and the upper fixed surface of roof are connected, and the upper surface fixedly connected with reinforcing plate of roof. Preferably, the inner wall fixedly connected with sealing ring of explosion-proof door frame, the lower surface fixedly connected with lantern ring of apron, and the external diameter of lantern ring is the same with the internal diameter of sealing ring. Preferably, the surface of the lower surface side of the lantern ring is fixedly connected with a sealing pad, the upper surface of the sealing pad is fixedly connected with a sealing convex ring, the lower surface of the sealing ring is provided with a groove, and the groove corresponds to the sealing convex ring on the upper surface of the sealing pad. Preferably, the spring I and the limiting rod are coaxially sleeved, and the coaxiality error of the spring I and the limiting rod is not more than +/-0.5 mm. The utility model provides a negative pressure spring explosion door of a flue. Compared with the prior art, the method has the following beneficial effects: 1. The buffer component and the upper surface of the limiting ring below are matched with the sliding rod of the supporting plate and the transverse plate in sliding connection with the top plate fixedly connected with the lower end of the sliding rod and the spring II on the side surface of the sliding rod, so that the problem that the explosion door is easy to deform and damage when the traditional flue explosion door is subjected to explosion impact is solved, the use stability of the explosion door is improved, th