Swing type explosion door for furnace

Abstract

The utility model belongs to the technical field of swing type explosion-proof doors, and discloses a swing type explosion-proof door for a furnace, which comprises a main body device used for sealing and preventing explosion through self weight, and a pressure relief device mounted on the main body device and used for outwards opening along with impact to relieve pressure and reduce impact, four adjusting assemblies used for elastic pressing and sliding pressing force adjusting are evenly arranged at the four corners of the pressure relief device. The pressure relief device comprises a pressure relief door, four pressing lugs are evenly arranged on the circumference of the pressure relief door, and a first sealing ring is installed on one side of the pressure relief door. According to the swing type explosion-proof door for the furnace, by means of the arrangement of elastic pressing and outward opening along with impact for pressure relief, pressure relief is conducted when explosion occurs, impact borne by the door plate is reduced, and the situation that the door shaft is pulled apart due to the fact that the door plate bears too large force is avoided; through the arrangement of sliding adjustment pressing force, adjustment of a pressure relief threshold value is achieved, and different requirements are met; and through the arrangement of double sealing, the sealing performance of the pressure relief position is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of swing-type explosion-proof doors, and in particular relates to a swing-type explosion-proof door for furnaces. Background Technology

[0002] Swing-type explosion-proof doors are an important safety facility, mainly used in boilers, combustion chambers, and other places where explosive gases or dust may accumulate, to prevent explosions from damaging equipment and personnel. Swing-type explosion-proof doors are explosion-proof devices that use their own weight to seal. Their working principle is based on mechanical balance. When an explosion occurs in the furnace, flue, or pulverizing system, the resulting pressure causes the explosion-proof door cover to open automatically, thereby releasing the pressure and reducing the impact of the explosion on the equipment. When the pressure decreases, the explosion-proof door cover can automatically reset and close, restoring the sealed state.

[0003] Comparing with Chinese Patent No. CN212132508U, a rotary explosion-proof door for furnaces is disclosed, including a flange, a door frame, a connecting shaft, and a door cover. The door frame is fixedly connected to the flange, the connecting shaft passes through the door frame, and the door cover is rotatably connected to the door frame through the connecting shaft. A protective mechanism is also connected between the door cover and the door frame.

[0004] The aforementioned patent uses an elastic buffer design, which can only cushion the door when it is opened by an impact, but cannot reduce the impact force it receives, making it easy to break the door hinge. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of this utility model is to provide a swing-type explosion-proof door for furnaces to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary explosion-proof door for furnaces includes a main body device for sealing and explosion-proof by its own weight, and a pressure relief device installed on the main body device for opening outward to release pressure and reduce impact following an impact. The pressure relief device has four adjusting components evenly arranged at its four corners for elastic clamping and sliding adjustment of the clamping force.

[0008] The pressure relief device includes a pressure relief door, which has four clamping ears evenly arranged around its circumference. A first sealing ring is installed on one side of the pressure relief door, and a protruding plate is provided inside the first sealing ring. A second sealing ring is arranged around the circumference of the protruding plate.

[0009] The adjustment assembly includes a fixed plate with a fixed shaft on the fixed plate. Two sliding grooves are symmetrically opened on the front and rear sides of the fixed shaft. A spring is installed on the outside of the fixed shaft. A pressure plate is provided on the side of the spring away from the fixed plate, and an adjustment nut is provided on the side of the pressure plate away from the spring.

[0010] Furthermore: the main body device includes a door frame, a mounting flange is provided on one side of the door frame, two fixing ears are symmetrically arranged on the front and back of the door frame, a door hinge is installed between the two fixing ears, a hanging ear is installed in the middle of the door hinge, and a door panel is provided below the hanging ear.

[0011] Furthermore, both the first sealing ring and the second sealing ring are made of heat-resistant silicone.

[0012] Furthermore, the contact surface between the convex plate and the second sealing ring is a conical surface.

[0013] Furthermore: the pressure plate is slidably connected to the fixed shaft, and the adjusting nut is threadedly connected to the fixed shaft.

[0014] Furthermore: the mounting flange is welded to the door frame, and a heat-resistant concrete layer is provided on the side of the door panel near the door frame.

[0015] Compared with existing technologies, the beneficial effects are:

[0016] 1. By using elastic compression and outward opening to release pressure following the impact, pressure is released when an explosion occurs, reducing the impact on the door panel and preventing it from being subjected to excessive force and breaking the door hinge;

[0017] 2. By adjusting the clamping force through a sliding adjustment, the pressure relief threshold can be adjusted to meet different needs;

[0018] 3. The double sealing design improves the sealing performance of the pressure relief point. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a swing-type explosion-proof door for furnaces according to the present invention;

[0020] Figure 2 This is an isometric view of the main device of the swing-type explosion-proof door for furnace described in this utility model;

[0021] Figure 3 This is an isometric view of the pressure relief device of the swing-type explosion-proof door for furnace described in this utility model;

[0022] Figure 4 This is an isometric view of the adjustment component of a swing-type explosion-proof door for furnaces according to this utility model.

[0023] In the attached drawings, the following are the reference numerals: 101, door frame; 102, mounting flange; 103, door panel; 104, fixing lug; 105, door hinge; 106, hanging lug; 201, pressure relief door; 202, clamping lug; 203, first sealing ring; 204, protruding plate; 205, second sealing ring; 301, fixing plate; 302, fixing shaft; 303, slide groove; 304, spring; 305, pressure plate; 306, adjusting nut. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 A rotary explosion-proof door for furnaces includes a main body device for sealing and explosion-proof by its own weight, and a pressure relief device installed on the main body device for opening outward to release pressure and reduce impact as it follows an impact. The pressure relief device has four adjusting components evenly arranged at its four corners for elastic clamping and sliding adjustment of the clamping force.

[0026] In this embodiment: the main device includes a door frame 101, a mounting flange 102 is provided on one side of the door frame 101, two fixing ears 104 are symmetrically arranged on the front and back of the door frame 101, a door hinge 105 is installed between the two fixing ears 104, a hanging ear 106 is installed in the middle of the door hinge 105, a door panel 103 is provided below the hanging ear 106, the mounting flange 102 is welded to the door frame 101, a heat-resistant concrete layer is provided on the side of the door panel 103 near the door frame 101, the door panel 103 is installed on the door hinge 105 supported by the fixing ears 104 through the hanging ear 106, and is hinged to the door frame 101 through the door hinge 105. In use, the door frame 101 is installed on the boiler through the mounting flange 102;

[0027] In this embodiment: the pressure relief device includes a pressure relief door 201, four clamping ears 202 are evenly arranged around the circumference of the pressure relief door 201, a first sealing ring 203 is installed on one side of the pressure relief door 201, a protruding plate 204 is arranged inside the first sealing ring 203, and a second sealing ring 205 is arranged around the circumference of the protruding plate 204. Both the first sealing ring 203 and the second sealing ring 205 are made of heat-resistant silicone. The contact surface between the protruding plate 204 and the second sealing ring 205 is a conical surface. In use, the adjusting component drives the pressure relief door 201 and the protruding plate 204 to clamp the first sealing ring 203 and the second sealing ring 205 respectively through the clamping ears 202, forming a double seal and improving the sealing performance of the pressure relief door 201. When an explosion occurs in the boiler, the high pressure generated in the furnace will impact the door plate 103, causing it to open around the door hinge 105. At the same time, it pushes the protruding plate 204 to open the pressure relief door 201 to relieve pressure and reduce the impact on the door plate 103.

[0028] In this embodiment: the adjustment component includes a fixed plate 301, a fixed shaft 302 is provided on the fixed plate 301, two sliding grooves 303 are symmetrically opened on the front and rear sides of the fixed shaft 302, a spring 304 is installed on the outside of the fixed shaft 302, a pressure plate 305 is provided on the side of the spring 304 away from the fixed plate 301, and an adjusting nut 306 is provided on the side of the pressure plate 305 away from the spring 304. The pressure plate 305 is slidably connected to the fixed shaft 302, and the adjusting nut 306 is threadedly connected to the fixed shaft 302. By rotating the adjusting nut 306, it pushes the pressure plate 305 under the support of the fixed plate 301 and the fixed shaft 302, and compresses the spring 304 along the fixed shaft 302 under the restriction of the sliding grooves 303. The compression amount of the spring 304 adjusts the clamping force of the spring 304 on the clamping ear 202, thereby adjusting the pressure relief threshold of the pressure relief valve 201.

[0029] Working principle: The door panel 103 is mounted on the door hinge 105 supported by the fixed ear 104 via the hanging ear 106, and is hinged to the door frame 101 via the door hinge 105. In use, the door frame 101 is mounted on the boiler via the mounting flange 102. Rotating the adjusting nut 306 causes it to push the pressure plate 305 along the fixed shaft 302 under the support of the fixed plate 301 and the fixed shaft 302, compressing the spring 304 along the fixed shaft 302 under the constraint of the sliding groove 303. This causes the spring 304 to drive the pressure relief door 201 and the convex plate 204 to press the first sealing ring 203 and the second sealing ring 205 respectively through the clamping ear 202, forming a double seal and improving the pressure relief door 201. The sealing performance of 1 is improved, and the compression of spring 304 on clamping lug 202 is adjusted by the compression of spring 304, thereby adjusting the pressure relief threshold of pressure relief door 201. During adjustment, the pressure relief threshold of pressure relief door 201 needs to be kept less than the opening threshold of door panel 103. When an explosion occurs in the boiler, the high pressure generated in the furnace will impact door panel 103, causing it to open around door hinge 105. At the same time, it pushes convex plate 204 to drive pressure relief door 201 to overcome the pressure of spring 304 and open along fixed shaft 302 to relieve pressure, reduce the impact on door panel 103, and prevent it from being overloaded and breaking door hinge 105 or lug 106.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A swing-type explosion-proof door for furnaces, comprising a main body device for sealing and explosion-proof by its own weight, characterized in that: It also includes a pressure relief device installed on the main device for opening outward to release pressure and reduce impact as it follows the impact. The pressure relief device has four adjustment components evenly arranged at its four corners for elastic clamping and sliding adjustment of the clamping force. The pressure relief device includes a pressure relief door (201), and four clamping ears (202) are evenly arranged around the circumference of the pressure relief door (201). A first sealing ring (203) is installed on one side of the pressure relief door (201), and a protruding plate (204) is provided inside the first sealing ring (203). A second sealing ring (205) is provided around the circumference of the protruding plate (204). The adjustment assembly includes a fixed plate (301), on which a fixed shaft (302) is provided. Two sliding grooves (303) are symmetrically opened on the front and rear sides of the fixed shaft (302). A spring (304) is installed on the outside of the fixed shaft (302). A pressure plate (305) is provided on the side of the spring (304) away from the fixed plate (301). An adjusting nut (306) is provided on the side of the pressure plate (305) away from the spring (304).

2. The furnace swing-type explosion-proof door according to claim 1, characterized in that: The main device includes a door frame (101), a mounting flange (102) is provided on one side of the door frame (101), two fixing ears (104) are symmetrically arranged on the front and back of the door frame (101), a door hinge (105) is installed between the two fixing ears (104), a hanging ear (106) is installed in the middle of the door hinge (105), and a door panel (103) is provided below the hanging ear (106).

3. The furnace swing-type explosion-proof door according to claim 1, characterized in that: Both the first sealing ring (203) and the second sealing ring (205) are made of heat-resistant silicone.

4. The furnace swing-type explosion-proof door according to claim 1, characterized in that: The contact surface between the convex plate (204) and the second sealing ring (205) is a conical surface.

5. A swing-type explosion-proof door for furnaces according to claim 1, characterized in that: The pressure plate (305) is slidably connected to the fixed shaft (302), and the adjusting nut (306) is threadedly connected to the fixed shaft (302).

6. A swing-type explosion-proof door for furnaces according to claim 2, characterized in that: The mounting flange (102) is welded to the door frame (101), and the door panel (103) is provided with a heat-resistant concrete layer on the side near the door frame (101).

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