Double-cylinder sliding compression sealing furnace door

Abstract

The utility model discloses a double-air-cylinder sliding pressing sealing furnace door which comprises a movable door assembly, a guide rail assembly, an outer swing door assembly, a Y-shaped connecting rod with a pin, an outer swing door air cylinder and a movable door air cylinder. The sealing furnace door is provided with double air cylinders, one air cylinder drives the movable door assembly and the outer swing door assembly to slide towards one side on the guide rail, and the other air cylinder drives the outer swing door assembly to be opened outwards or pressed inwards; a pressing ring is installed on the outer swing door assembly, a filler fixing groove is formed in the guide rail assembly, a high-temperature-resistant filler layer used in cooperation with the pressing ring is installed in the groove, the gas sealing effect can be guaranteed after the outer swing door assembly is pressed, the defects in the prior art are overcome, the furnace door and the sealing filler are tightly connected in a pressing mode, the structure is simple, and safety and reliability are achieved. The problem that high-temperature smoke overflows due to the fact that some boiler doors are not tightly sealed is effectively solved, and the boiler door sealing device can be applied to other sealing scenes with similar requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler burners, in particular to a double-cylinder sliding, pressing and sealing furnace door suitable for various types of boilers. Technical Background

[0002] The main method of waste incineration is to use a rotary kiln incinerator. To achieve complete incineration of waste, the incinerator is equipped with multiple combustion chambers, such as the secondary combustion chamber. Its special structure allows the waste to complete the process from drying, volatilization, ignition to burning through several heat transfer methods, and achieve complete combustion in the secondary combustion chamber.

[0003] In order to ensure complete combustion and reduce the generation of dioxins, according to national standards, the temperature in the secondary combustion chamber must be maintained above 1100°C and the smoke residence time must be no less than 2 seconds. The secondary combustion chamber is usually equipped with an auxiliary burner, which is started when the heat of the material combustion is low to ensure that the temperature of the secondary combustion chamber meets the requirements.

[0004] In recent years, there are two main methods for protecting the nozzle of the secondary combustion chamber burner: (1) The burner is always inserted and installed on the secondary combustion chamber without being removed, and a stream of auxiliary combustion air is always blown in. This air can be used as combustion air when the burner is running, and can cool the nozzle when the burner is not running. However, this method increases energy consumption on the one hand, and the auxiliary combustion air may affect the balance of the combustion conditions in the furnace on the other hand. (2) When the burner is not running, the burner is manually removed or installed on a bracket with a propulsion device, and the propulsion and withdrawal of the burner are controlled by pneumatic or electric means;

[0005] If the method of withdrawing the burner is adopted, then after the burner withdraws from the combustion chamber, the burner mounting hole needs to be blocked to prevent the flame or high-temperature flue gas from leaking from the mounting hole, causing casualties or equipment damage. At present, fan-shaped or circular movable cover plates are used as furnace doors on boilers to block the burner mounting holes. The cover plates can only rotate or move radially and cannot be pressed axially in the mounting hole. This results in the mounting hole being unable to be completely sealed and there is still the possibility of high-temperature flue gas leakage. Grate boilers or other types of boilers used in biomass power generation also have similar problems that need to be solved. Therefore, it is necessary to propose a new compression and sealing furnace door to solve the problems in the prior art. Utility Model Content

[0006] Technical problem: The purpose of the utility model is to overcome the shortcomings of the prior art and provide a double-cylinder sliding compression sealing furnace door with a simple structure, stable and reliable, and tightly sealed.

[0007] Technical solution: To achieve the above-mentioned purpose, the utility model provides a double-cylinder sliding compression sealing furnace door, comprising a moving door assembly, a guide rail assembly, an outward swing door assembly, a Y-shaped connecting rod with a pin 1, a Y-shaped connecting rod with a pin 2, an outward swing door cylinder and a moving door cylinder; the moving door assembly is arranged on a slideway on the inner end surface of the guide rail assembly, and a furnace door positioning block and a positioning bolt fixed to the boiler are arranged on the outer end surface of the guide rail assembly; the outward swing door assembly is arranged on the moving door assembly, and the outward swing door cylinder is vertically arranged on the moving door assembly, which is responsible for vertically compressing or opening the furnace door, and the outward swing door cylinder ... The swing door cylinder is provided with a Y-shaped connecting rod with a pin connected to the outer swing door assembly, one end of the Y-shaped connecting rod with a pin is fixed to the outer swing door cylinder, and the other end is connected and fixed to the pin shaft of the moving door assembly; the moving door cylinder is horizontally arranged on the guide rail assembly, responsible for the overall horizontal movement of the furnace door, and the moving door cylinder is provided with a Y-shaped connecting rod with a pin connected to the moving door assembly, one end of the Y-shaped connecting rod with a pin is fixed to the moving door cylinder, and the other end is connected and fixed to the pin shaft of the moving door assembly; the moving door assembly can slide left and right in the guide rail assembly to complete horizontal door opening and closing.

[0008] The movable door assembly includes a bracket mounting plate, a right-side slave rocker arm, a left-side slave rocker arm, an active rocker arm, and a cylinder connecting plate; a circular hole matching the outward swing door assembly is opened in the middle of the bracket mounting plate, and two grooved rollers are symmetrically provided on the upper and lower parts of the bracket mounting plate, for a total of four; the left-side slave rocker arm is arranged on the bracket mounting plate at the upper left side of the circular hole, the active rocker arm is arranged on the bracket mounting plate at the lower left side of the circular hole, and the right-side slave rocker arm is divided into two upper and lower parts, which are respectively arranged on the bracket mounting plates at the upper right side and the lower right side of the circular hole; a connecting rod is connected between the left-side slave rocker arm and the active rocker arm, and the two right-side slave rockers are connected with a connecting rod; springs connected to the bracket mounting plate are respectively provided at the connection points at both ends of the connecting rod connecting the two right-side slave rockers, and a cylinder connecting plate is also provided at the lower left side of the bracket mounting plate.

[0009] The guide rail assembly includes a furnace door mounting plate, a filler fixing ring, a high-temperature resistant filler layer, an angle steel frame, a square guide rail and a movable door cylinder mounting platform; there are two filler fixing rings, and the high-temperature resistant filler layer is arranged between the two fixing rings; the movable door cylinder mounting platform is welded and fixed at the lower right corner of the furnace door mounting plate, the square guide rail is arranged in parallel in the angle steel frame, and the angle steel frame cantilever is welded on the furnace door mounting plate outside the filler fixing ring.

[0010] The high temperature resistant filler layer comprises a flexible graphite braided filler which is resistant to high temperature of ≥300°C, resistant to corrosion, has high resilience, low ductility, is not prone to decomposition under high temperature, high pressure or radiation conditions, and has good thermal conductivity.

[0011] The outward swing door assembly includes a furnace door baffle, a crank shaft mounting seat, a crank shaft, a furnace door cone and a clamping ring; the furnace door cone is arranged on one side end face of the furnace door baffle, and the clamping ring is welded and fixed to the furnace door baffle on the outer circumference of the furnace door cone; there are four crank shaft mounting seats, which are symmetrically arranged on the other side end face of the furnace door baffle in upper and lower directions and left and right directions, and there are two crank shafts, which are symmetrically arranged on the crank shaft mounting seats.

[0012] The clamping ring is made of common metal material, Q235B carbon steel or 304 stainless steel.

[0013] The furnace door cone is circular, square or in a shape that meets the requirements of on-site use.

[0014] The outer swing door cylinder and the movable door cylinder are both equipped with displacement sensors for confirming whether the cylinders have moved to their proper positions.

[0015] The movable door assembly slides left and right on the square guide rail of the guide rail assembly through four grooved rollers.

[0016] Beneficial effects: Due to the adoption of the above technical scheme, the sealed furnace door of the utility model can be used in boilers such as rotary kiln incinerators and grate boilers for biomass power generation, and can also be used in other sealing scenarios with similar needs. The double cylinder slides and presses the sealed furnace door, and is equipped with double cylinders at the same time, with fast movement speed, stable structure, and uniform force. Both cylinders are equipped with displacement sensors, which can remotely monitor whether the cylinders are working in place and control the opening, closing and horizontal movement of the furnace door. At the same time, it is equipped with a high-temperature resistant packing layer and a clamping ring, and the soft and hard materials cooperate with each other for better sealing. The structure adopts a rocker arm connecting rod spring mechanism for force amplification. By utilizing the mechanical properties of the mechanism, it can increase force and press when sealing, and it can be opened very quickly. It solves the problem of poor sealing of the furnace door in the prior art, greatly improves the safety of use, and at the same time, the structure is relatively simple and the cost is low. It has been tested for long-term use in engineering projects and the effect is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the furnace door of the utility model in a closed state.

[0018] Figure 2 It is a left-side structural schematic diagram of the furnace door of the utility model in a closed state.

[0019] Figure 3 It is a partially enlarged schematic diagram of a Y-shaped connecting rod with a pin.

[0020] Figure 4 It is a partial enlarged schematic diagram of the second Y-shaped connecting rod with a pin.

[0021] Figure 5 It is a schematic diagram of the main structure of the furnace door of the utility model in an open state.

[0022] Figure 6 It is a right-side structural schematic diagram of the utility model in an open state of a furnace door.

[0023] Figure 7 It is an isometric structural diagram of the movable door assembly of the utility model.

[0024] Figure 8 It is a schematic diagram of the main structure of the guide rail assembly of the utility model.

[0025] Fig. 9 It is a schematic diagram of the main structure of the outward swing door assembly of the utility model.

[0026] Fig.10 It is an isometric structural diagram of an outward swing door assembly of the utility model.

[0027] In the figure: 1-moving door assembly, 1-1-bracket mounting plate, 1-4-right side slave rocker arm, 1-5-left side slave rocker arm, 1-6-active rocker arm, 1-7-cylinder connecting plate, 2-guide rail assembly, 2-1-furnace door mounting plate, 2-2-filling fixing ring, 2-3-high temperature resistant filler layer, 2-4-angle steel frame, 2-5-square guide rail, 2-6-moving door cylinder mounting platform, 3-outward swing door assembly, 3-1 furnace door baffle, 3-2-crank shaft mounting seat, 3-3-crank shaft, 3-4 furnace door cone, 3-5-clamping ring, 4-furnace door positioning block, 5-positioning bolt, 6-Y-type pin connecting rod one, 7-Y-type pin connecting rod two, 8-outward swing door cylinder, 9-moving door cylinder, 10-displacement sensor, 11-boiler insulation sealing box. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments in the accompanying drawings:

[0029] The utility model discloses a double-cylinder sliding compression sealing furnace door, which is characterized in that it comprises a moving door assembly (1), a guide rail assembly (2), an outward swing door assembly (3), a Y-shaped connecting rod with a pin (6), a Y-shaped connecting rod with a pin (7), an outward swing door cylinder (8) and a moving door cylinder (9); the moving door assembly (1) is arranged on a slideway on the inner end surface of the guide rail assembly (2), and the moving door assembly (1) slides left and right on the square guide rail (2-5) of the guide rail assembly (2) through four grooved rollers (1-8). The outer end surface of the guide rail assembly (2) is provided with a furnace door positioning block (4) and a positioning bolt (5) for fixing to the boiler; the outer swing door assembly (3) is arranged on the movable door assembly (1); the outer swing door cylinder (8) is vertically arranged on the movable door assembly (1) and is responsible for pressing or opening the furnace door in the vertical direction; the outer swing door cylinder (8) is provided with a Y-shaped connecting rod (6) with a pin connected to the outer swing door assembly (3); one end of the Y-shaped connecting rod (6) with a pin is fixed to the outer swing door cylinder (8), and the other end is connected and fixed to the pin shaft of the movable door assembly (1); the movable door cylinder The cylinder (9) is horizontally arranged on the guide rail assembly (2) and is responsible for the overall horizontal movement of the furnace door. The movable door cylinder (9) is provided with two Y-shaped connecting rods with pins (7) connected to the movable door assembly (1). One end of the two Y-shaped connecting rods with pins (7) is fixed to the movable door cylinder (9), and the other end is connected and fixed to the pin shaft of the movable door assembly (1). The outer swing door cylinder (8) and the movable door cylinder (9) are both provided with displacement sensors (10) for confirming whether the cylinders are in place. The movable door assembly (1) can slide left and right in the guide rail assembly (2) to complete the horizontal opening and closing of the door.

[0030] The movable door assembly (1) comprises a bracket mounting plate (1-1), a right side slave rocking arm (1-4), a left side slave rocking arm (1-5), an active rocking arm (1-6), and a cylinder connecting plate (1-7); a circular hole matching the outer swing door assembly (3) is opened in the middle of the bracket mounting plate (1-1); two grooved rollers (1-8) are symmetrically arranged on the upper and lower parts of the bracket mounting plate (1-1), for a total of four; the left side slave rocking arm (1-5) is arranged on the bracket mounting plate (1-1) at a position slightly above the left side of the circular hole; the active rocking arm (1-6) is arranged on the bracket mounting plate (1-1) at a position slightly below the left side of the circular hole; On the mounting plate (1-1), the right side slave rocker arm (1-4) is divided into two upper and lower parts, which are respectively arranged on the bracket mounting plate (1-1) at the upper right side and the lower right side of the circular hole; a connecting rod (1-2) is connected between the left side slave rocker arm (1-5) and the active rocker arm (1-6), and the two right side slave rocker arms (1-4) are connected to the connecting rod (1-2); springs (1-3) connected to the bracket mounting plate (1-1) are respectively arranged at the connection points at both ends of the connecting rod (1-2) connecting the two right side slave rocker arms (1-4); and a cylinder connecting plate (1-7) is also arranged at the lower left side of the bracket mounting plate (1-1).

[0031] The guide rail assembly (2) includes a furnace door mounting plate (2-1), a packing fixing ring (2-2), a high temperature resistant packing layer (2-3), an angle steel frame (2-4), a square guide rail (2-5) and a movable door cylinder mounting platform (2-6); the packing fixing ring (2-2) is two, and the high temperature resistant packing layer (2-3) is arranged between the two fixing rings (2-2); the movable door cylinder mounting platform (2-6) is welded and fixed at the lower right tentacles of the furnace door mounting plate (2-1), the square guide rail (2-5) is arranged in parallel in the angle steel frame (2-4), and the angle steel frame (2-4) is cantilever welded on the furnace door mounting plate (2-1) outside the packing fixing ring (2-2). The high temperature resistant packing layer (2-3) includes a flexible graphite braided packing that is resistant to high temperature and corrosion at ≥300°C, has high resilience, low ductility, is not easy to decompose under high temperature, high pressure or radiation conditions, and has good thermal conductivity.

[0032] The outer swing door assembly (3) comprises a furnace door baffle (3-1), a crankshaft mounting seat (3-2), a crankshaft (3-3), a furnace door cone (3-4) and a clamping ring (3-5); the furnace door cone (3-4) is arranged on one side end face of the furnace door baffle (3-1), and the clamping ring (3-5) is welded and fixed on the furnace door baffle (3-1) on the outer circumference of the furnace door cone (3-4); the crankshaft mounting seats (3-2) are four, symmetrically arranged on the other side end face of the furnace door baffle (3-1) in upper and lower and left and right directions, and the crankshafts (3-3) are two, symmetrically arranged on the crankshaft mounting seat (3-2). The clamping ring (3-5) is made of common metal materials, Q235B carbon steel or 304 stainless steel. The furnace door cone (3-4) is round, square or a shape that meets the requirements of on-site use.

Claims

1. A double-cylinder sliding compression sealing furnace door, characterized in that: It comprises a moving door assembly (1), a guide rail assembly (2), an outward swing door assembly (3), a Y-shaped connecting rod with a pin (1), a Y-shaped connecting rod with a pin (2), an outward swing door cylinder (8) and a moving door cylinder (9); the moving door assembly (1) is arranged on a slideway on the inner end surface of the guide rail assembly (2); the outer end surface of the guide rail assembly (2) is provided with a furnace door positioning block (4) and a positioning bolt (5) for fixing with the boiler; the outward swing door assembly (3) is arranged on the moving door assembly (1); the outward swing door cylinder (8) is vertically arranged on the moving door assembly (1) and is responsible for pressing or opening the furnace door in the vertical direction; the outward swing door cylinder (8) is provided with a positioning bolt (5) for fixing with the outward swing door assembly A Y-shaped connecting rod with a pin (6) connected to the guide rail assembly (3), one end of the Y-shaped connecting rod with a pin (6) is fixed to the outer swing door cylinder (8), and the other end is connected and fixed to the pin shaft of the movable door assembly (1); the movable door cylinder (9) is horizontally arranged on the guide rail assembly (2), responsible for the overall horizontal movement of the furnace door, and the movable door cylinder (9) is provided with a Y-shaped connecting rod with a pin (7) connected to the movable door assembly (1), one end of the Y-shaped connecting rod with a pin (7) is fixed to the movable door cylinder (9), and the other end is connected and fixed to the pin shaft of the movable door assembly (1); the movable door assembly (1) can slide left and right in the guide rail assembly (2) to complete horizontal door opening and closing.

2. A double-cylinder sliding compression sealing furnace door according to claim 1, characterized in that: The movable door assembly (1) comprises a bracket mounting plate (1-1), a right side slave rocking arm (1-4), a left side slave rocking arm (1-5), an active rocking arm (1-6), and a cylinder connecting plate (1-7); a circular hole matching the outer swing door assembly (3) is opened in the middle of the bracket mounting plate (1-1); two grooved rollers (1-8) are symmetrically arranged on the upper and lower parts of the bracket mounting plate (1-1), for a total of four; the left side slave rocking arm (1-5) is arranged on the bracket mounting plate (1-1) at a position slightly above the left side of the circular hole; the active rocking arm (1-6) is arranged on the bracket mounting plate (1-1) at a position slightly below the left side of the circular hole; On the mounting plate (1-1), the right side slave rocker arm (1-4) is divided into two upper and lower parts, which are respectively arranged on the bracket mounting plate (1-1) at the upper right side and the lower right side of the circular hole; a connecting rod (1-2) is connected between the left side slave rocker arm (1-5) and the active rocker arm (1-6), and the two right side slave rocker arms (1-4) are connected to the connecting rod (1-2); springs (1-3) connected to the bracket mounting plate (1-1) are respectively arranged at the connection points at both ends of the connecting rod (1-2) connecting the two right side slave rocker arms (1-4); and a cylinder connecting plate (1-7) is also arranged at the lower left side of the bracket mounting plate (1-1).

3. The double-cylinder sliding compression sealing furnace door according to claim 1, characterized in that: The guide rail assembly (2) comprises a furnace door mounting plate (2-1), a packing fixing ring (2-2), a high temperature resistant packing layer (2-3), an angle steel frame (2-4), a square guide rail (2-5) and a movable door cylinder mounting platform (2-6); there are two packing fixing rings (2-2), and the high temperature resistant packing layer (2-3) is arranged between the two fixing rings (2-2); the movable door cylinder mounting platform (2-6) is welded and fixed at the lower right corner of the furnace door mounting plate (2-1), the square guide rail (2-5) is arranged in parallel in the angle steel frame (2-4), and the angle steel frame (2-4) is cantilever welded on the furnace door mounting plate (2-1) outside the packing fixing ring (2-2).

4. A double-cylinder sliding compression sealing furnace door according to claim 3, characterized in that: The high temperature resistant filler layer (2-3) comprises a flexible graphite braided filler which is resistant to high temperatures of ≥300°C, resistant to corrosion, has high resilience, low ductility, is not prone to decomposition under high temperature, high pressure or radiation conditions, and has good thermal conductivity.

5. The double-cylinder sliding compression sealing furnace door according to claim 1, characterized in that: The outward swing door assembly (3) comprises a furnace door baffle (3-1), a crank shaft mounting seat (3-2), a crank shaft (3-3), a furnace door cone cylinder (3-4) and a clamping ring (3-5); the furnace door cone cylinder (3-4) is arranged on one side end face of the furnace door baffle (3-1), and the clamping ring (3-5) is welded and fixed on the furnace door baffle (3-1) on the outer circumference of the furnace door cone cylinder (3-4); there are four crank shaft mounting seats (3-2), which are symmetrically arranged on the other side end face of the furnace door baffle (3-1) in upper and lower directions and left and right directions; there are two crank shafts (3-3), which are symmetrically arranged on the crank shaft mounting seat (3-2).

6. A double-cylinder sliding compression sealing furnace door according to claim 5, characterized in that: The clamping ring (3-5) is made of common metal material, Q235B carbon steel or 304 stainless steel.

7. The double-cylinder sliding compression sealing furnace door according to claim 5, characterized in that: The furnace door cone (3-4) is circular, square or in a shape that meets the requirements of on-site use.

8. The double-cylinder sliding compression sealing furnace door according to claim 1, characterized in that: The outer swing door cylinder (8) and the movable door cylinder (9) are both equipped with displacement sensors (10) for confirming whether the cylinders have moved to their proper positions.

9. The double-cylinder sliding compression sealing furnace door according to claim 1, characterized in that: The movable door assembly (1) slides left and right on the square guide rail (2-5) of the guide rail assembly (2) via four grooved rollers (1-8).

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