Rotary material-uniformizing fireproof door

Abstract

The utility model discloses a rotary material uniformizing fireproof door which comprises a stock bin, a material stirring roller, an arc face guide plate, an elastic pressing mechanism, a gear motor, a shaft seat and a workbench. The material stirring roller is arranged in the stock bin, and the two ends of the material stirring roller are supported by shaft seats; the cambered surface guide plate comprises two plate bodies which symmetrically wrap the two sides of the material stirring roller; the top end of the cambered-surface guide plate is fixed at the top of the inner wall of the stock bin through a rotating shaft; the two elastic pressing mechanisms are arranged on the outer sides of the cambered surface guide plates correspondingly and abut against the cambered surface guide plates. The gear motor is in driving connection with the material stirring roller. According to the scheme, through multi-dimensional structural innovation, the design of the inclined material stirring plate achieves the effects of rapid discharging and congestion risk reduction, the forward and reverse rotation structure has the telescopic function, and the problems that a traditional fireproof door is uneven in feeding, prone to blockage, poor in adaptability and insufficient in fireproof capacity are solved; and the operation efficiency, the stability and the safety of the feeding system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of biomass power plant, solid waste power plant and coal power plant blending feeding system, especially relates to a rotary material uniformity fire door. BACKGROUND

[0002] In the field of biomass power plant, solid waste power plant and coal power plant blending feeding system, the performance of fire door, the superior equipment of furnace mouth spiral conveyor, directly influences the stability and safety of the whole feeding process. At present, the existing fire door on the market exposes many problems to be solved in practical application.

[0003] From the uniformity and stability of feeding, the traditional fire door adopts symmetrical structure design. Although this structure seems balanced in theory, but when facing different characteristic materials such as biomass, solid waste and coal, the flexibility is seriously insufficient. For example, the shape and size of biomass material are quite different, and the symmetrical structure is difficult to adapt to its complex and changeable form, leading to uneven distribution of material in the conveying process, and easy to appear local accumulation or overhead phenomenon, and then affect the continuity and stability of feeding.

[0004] In terms of dealing with strip materials, the existing fire door usually has ordinary design of the paddle, and does not have targeted processing capacity. When the common strip materials such as straw in biomass power plant enter the conveying system, the ordinary paddle cannot effectively shear them, and the strip materials are easy to entangle and knot, and then block the conveying channel. Once the blockage occurs, not only the production efficiency is affected, but also the material may be fermented due to long-term blockage, and safety hazards may be caused.

[0005] In addition, the existing fire door is generally lack of telescopic function on both sides. In actual production, the humidity, density and other factors of the material will cause the volume to change, and the fixed side plate cannot make corresponding adjustment according to the change of the volume of the material. This makes the material easy to be extruded by the side plate or form a large gap between the side plate and the material in the conveying process. The former may cause the material to be broken and deformed, affecting the subsequent combustion effect, and the latter may cause the material to leak, not only wasting resources, but also polluting the working environment.

[0006] More importantly, in terms of fire prevention, the existing fire door does not have ideal blocking effect on the boiler back smoke and back fire. Due to the defects of structure design and sealing performance, when the internal pressure of the boiler fluctuates, the high-temperature flue gas and flame are easy to flow upward through the gap between the fire door and the conveying pipeline, which not only causes thermal damage to the upstream equipment, shortens the service life of the equipment, but also seriously threatens the personal safety of the operators. UTILITY MODEL CONTENTS

[0007] In view of the technical problems of uneven feeding, easy blocking and inability to effectively block boiler back smoke and back fire of the upper equipment of the screw conveyor in front of the furnace mouth in the biomass, solid waste and coal power plant blending feeding system, the technical object of the utility model is to provide a rotary material uniformizing fire door which realizes uniform and continuous stable feeding, reduces the risk of blocking and effectively blocks boiler back smoke and back fire through asymmetric arrangement, forward and reverse rotation function, side plate telescopic design and oblique tooth pick.

[0008] The utility model adopts the technical scheme that solves its technical problems:

[0009] The rotary material uniformizing fire door comprises a stock bin, a poking roller, an arc surface guide plate, an elastic compression mechanism, a speed reducer, a shaft seat and a workbench. The top of the stock bin is provided with an inlet, and the bottom is provided with an outlet in a relative position. The poking roller is arranged in the stock bin and located between the inlet and the outlet. The shaft seat is fixed on the workbench. The plate body of the arc surface guide plate is arc-shaped and comprises two pieces which are symmetrically arranged on the two sides of the inlet and wrap the two sides of the poking roller. The top end of the arc surface guide plate is fixed to the inner wall top of the stock bin through a rotating shaft and can rotate along the rotating shaft to expand the distance between the arc surface guide plate and the poking roller. The elastic compression mechanism is located in the stock bin and comprises two pieces which are arranged on the outside of the arc surface guide plate and abut against the arc surface guide plate respectively. The stock bin and the speed reducer are both fixed on the workbench. The speed reducer is connected with the poking roller through a coupling and drives the poking roller to rotate.

[0010] In a further preferred technical scheme, the elastic compression mechanism comprises a first arm lever, a second arm lever, a counterweight lever, a counterweight block and a connecting rod. The first arm lever is located in the stock bin and arranged on the outside of the arc surface guide plate with its arm lever abutting against the arc surface guide plate. The top end of the first arm lever is coaxially fixedly connected with one end of the second arm lever through the connecting rod. The two ends of the connecting rod are fixed in the stock bin through bearings. When the connecting rod rotates, it drives the first arm lever and the second arm lever to rotate synchronously. The other end of the second arm lever penetrates through the stock bin and is hingedly connected with one end of the counterweight lever. The counterweight block is fixed to the other end of the counterweight lever.

[0011] In a further preferred technical scheme, the two ends of the connecting rod are symmetrically provided with the first arm lever, the second arm lever, the counterweight lever and the counterweight block.

[0012] In a further preferred technical scheme, the poking roller comprises a roller shaft and a plurality of obliquely arranged poking plates which are equidistantly distributed along the circumference of the roller shaft. The obliquely arranged poking plates form an angle θ with the axis of the roller shaft. The angle design of the obliquely arranged poking plates differentiates the feeding flow rate at the two ends of the poking roller, especially for strip-shaped materials, which can effectively reduce the congestion caused by strip-shaped materials.

[0013] To further optimize the technical solution, five inclined material feeding plates are provided.

[0014] Further optimization of the technical solution involves making the bottom openings of the two arc-shaped guide plates larger than the discharge port.

[0015] A further optimized technical solution is proposed: the lower part of the silo wall is inclined, causing the silo body to converge towards the discharge port.

[0016] A further optimized technical solution is provided, wherein the feed inlet is provided with a feed guide plate; the feed guide plate is vertically downward along the feed inlet and the bottom is bent inward and gathered, thereby ensuring that the material enters between the inclined feed plates of the feed roller.

[0017] Further optimization of the technical solution involves symmetrically providing two pairs of pull rings on the outer wall of the hopper to facilitate equipment lifting and hoisting.

[0018] The beneficial effects of this utility model are:

[0019] The rotating uniform fireproof door provided by this utility model significantly improves the feeding stability, anti-clogging performance, and fire safety of biomass, solid waste, and coal-fired power plant co-firing systems through structural innovation and functional optimization. Specifically, this is reflected in the following aspects:

[0020] 1. Significantly improved feeding uniformity and stability

[0021] Employing an asymmetrically arranged arc-shaped guide plate and an elastic clamping mechanism, combined with the inclined toothed and angled material-feeding plate design of the feeding roller, the material distribution pressure can be dynamically adjusted. Through the rotational adjustment of the arc-shaped guide plate and the self-adaptive counterweight function of the elastic clamping mechanism, it can adapt to the characteristics of materials with different shapes and moisture content, avoiding local accumulation or bridging phenomena, and ensuring uniform and continuous material feeding. It is especially suitable for the stable conveying of irregularly shaped materials such as biomass.

[0022] 2. Effectively solves the problem of strip-shaped materials entanglement and blockage.

[0023] The inclined toothed feeding plate on the feeding roller is designed at an angle to the roller shaft, creating a differentiated feed flow rate and shearing action. This allows for active shearing of strip-shaped materials such as straw, preventing them from tangling or knotting. Simultaneously, the design of the arc-shaped guide plate with an opening at the bottom larger than the discharge port further expands the material passage space. This dual effect significantly reduces the risk of blockage, decreases downtime for cleaning, and improves production efficiency.

[0024] 3. Adaptive expansion and contraction adjustment function to accommodate changes in material volume.

[0025] Through the linkage design of the counterweight rod of the elastic compression mechanism and the cambered guide plate, the side plate can dynamically adjust the gap according to the volume change of the material, so that the problems of lateral extrusion or gap leakage caused by material expansion or shrinkage are avoided, the material integrity is protected, and resource waste and environmental pollution caused by material leakage are prevented.

[0026] 4. Enhanced fireproof and smokeproof performance, ensuring system safety

[0027] The lower part of the stock bin adopts an inclined folding structure, and the arc guide plate is wrapped and sealed to the poking roller, forming a multiple physical barrier. When the boiler returns smoke and fire, the inclined bin wall can guide the high-temperature gas flow to the center to reduce the horizontal diffusion, and the close cooperation of the arc guide plate and the elastic compression mechanism effectively seals the gap of the conveying channel, blocks the reverse flow of smoke and fire, and protects the safety of the upstream equipment and the operating personnel.

[0028] 5. Structure optimization improves practicality and maintenance convenience

[0029] The inner-bending folding guide plate is additionally arranged at the feeding port, which can accurately guide the material into the gap between the inclined poking plate, and avoid material deviation. The pull ring arranged symmetrically on the outer wall simplifies the hoisting process, and facilitates quick installation and maintenance of the equipment. In addition, the reverse rotation switching function of the poking roller driven by the speed reducer can flexibly cope with different working conditions, and further reduces the risk of material blockage.

[0030] In summary, through multi-dimensional structural innovation, the utility model solves the pain points of uneven feeding, easy blockage, poor adaptability and insufficient fireproofing ability of the traditional fireproof door, significantly improves the running efficiency, stability and safety of the feeding system, and has wide application value. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the front view of the overall structure of the utility model.

[0032] Figure 2 is the side view of the overall structure of the utility model.

[0033] Figure 3 is the top view of the overall structure of the utility model.

[0034] Figure 4 is Figure 1 is the state diagram when the arc guide plate is opened by a large material.

[0035] In the figure: 1 - stock bin, 2 - poking roller, 3 - cambered guide plate, 4 - elastic compression mechanism, 5 - speed reducer, 6 - shaft seat, 7 - workbench; 101 - feeding port, 102 - discharging port, 103 - feeding guide plate, 104 - pull ring; 201 - roller shaft, 202 - inclined poking plate, 41 - first arm rod, 42 - second arm rod, 43 - counterweight rod, 44 - counterweight block, 45 - shaft coupling. Detailed Implementation

[0036] 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.

[0037] like Figures 1-2 As shown, the rotating uniform fire door disclosed in this utility model has the following specific structural implementation:

[0038] 1. Overall composition and connection relationships:

[0039] The rotating material distribution fireproof door of this embodiment includes: a hopper 1, a feeding roller 2, an arc-shaped guide plate 3, an elastic pressing mechanism 4, a reduction motor 5, a bearing 6, and a worktable 7. The hopper 1 has a feed inlet 101 at the top and a discharge outlet 102 at the bottom. The feeding roller 2 is horizontally positioned in the middle of the inner cavity of the hopper 1, and both ends are supported and fixed to the worktable 7 by the bearing 6. Two arc-shaped guide plates 3 are symmetrically arranged on both sides of the feed inlet 101 and wrap around both sides of the feeding roller 2. The top ends are hinged to the top of the inner wall of the hopper 1 via a rotating shaft 31, and the bottom opening diameter is larger than the diameter of the discharge outlet 102. The elastic pressing mechanism 4 includes two sets symmetrically installed on the side wall of the hopper 1, acting on the outer surface of the arc-shaped guide plate 3 respectively. The reduction motor 5 is driven by the feeding roller 2 via a coupling.

[0040] 2. Detailed structure of core components:

[0041] The feeding roller 2 includes a roller shaft 201 and five inclined feeding plates 202 evenly distributed along the circumference. The inclined feeding plates 202 are arranged at an angle θ to the axis of the roller shaft 201 (10°≤θ≤30°). This structure achieves asymmetrical feeding, creating differentiated feed velocities at both ends. Combined with the forward and reverse rotation function, it generates a shearing effect on strip-shaped materials such as straw, reducing the risk of entanglement.

[0042] The elastic clamping mechanism 4 consists of a first arm 41, a second arm 42, a counterweight rod 43, a counterweight block 44, and a coupling 45. The inner end of the first arm 41 abuts against the outer curved surface of the arc-shaped guide plate 3, and forms a synchronous swinging mechanism with the second arm 42 through the coupling 45. The counterweight block 44 is hinged to the outer end of the second arm 42 through the counterweight rod 43. When the volume of biomass material changes: the outward-pushing arc-shaped guide plate 3 compresses the first arm 41, and the counterweight block 44 automatically adjusts the clamping force through leverage to maintain the adaptive sealing of the material channel.

[0043] In order to further improve the uniformity of the pressure of the elastic compression mechanism 4 on the arc surface guide plate 3 and the force, the first arm rod 41, the second arm rod 42, the counterweight rod 43 and the counterweight 44 are symmetrically arranged at both ends of the connecting rod 45.

[0044] 3. Auxiliary structural features

[0045] The lower bin wall of the bin 1 adopts an inclined folding structure, the inclination angle α = 45°-60°, and gradually shrinks towards the discharge port 102. In combination with the double-bend structure (the upper vertical section H1 + the lower inward section H2) of the feeding guide plate 103, a material directional gathering area is formed, and the lifting inclined raking plate 202 improves the uniformity of material taking.

[0046] Two pairs of pull rings 104 are symmetrically arranged on the outer wall of the bin 1, and are fixed by hoisting and welding in an eight-shaped manner, meeting the multi-point balanced hoisting requirement during equipment installation.

[0047] Work flow and principle

[0048] When the material enters through the feeding port 101:

[0049] First step: the feeding guide plate 103 guides the material to fall into the working area of the raking roller 2;

[0050] Second step: the raking roller 2 is rotated by the driving of the speed reducer 5, and the inclined raking plate 202 pushes the material in the axial and radial directions;

[0051] Third step: the volume-expanded material pushes the arc surface guide plate 3 to expand outward, and the elastic compression mechanism 4 automatically increases the abutting force to maintain the dynamic sealing of the discharge port 102;

[0052] Fourth step: after being sheared and dispersed by the inclined raking plate 202, the material slides along the inclined bin wall to the discharge port 102 to complete the conveying.

[0053] Fireproof blocking stage: when the boiler backfire is detected, the arc surface guide plate 3 closely adheres to the inclined raking plate 202 under the action of the elastic compression mechanism 4, forming a continuous sealing curved surface to block the flame propagation path.

[0054] It should be noted that in this text, terms such as "including", "containing" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0055] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire door with rotary homogenization, characterized in that, It includes a hopper, a poking roller, an arc guide plate, an elastic compression mechanism, a speed reducer, an axle seat and a workbench; the top of the hopper is provided with an inlet, and the bottom is provided with an outlet in a relative position; the poking roller is arranged in the hopper and located between the inlet and the outlet, and the two ends thereof pass through the wall of the hopper and are supported by the axle seat; the axle seat is fixed on the workbench; the plate body of the arc guide plate is arc-shaped, includes two pieces and is symmetrically arranged on the two sides of the inlet and wraps the two sides of the poking roller; the top end of the arc guide plate is fixed on the inner wall of the hopper by a rotating shaft and can rotate along the rotating shaft to expand the distance between the arc guide plate and the poking roller; the elastic compression mechanism is arranged in the hopper and includes two pieces and is arranged on the outer side of the arc guide plate and abuts against the arc guide plate; the hopper and the speed reducer are fixed on the workbench; the speed reducer is connected with the poking roller through a shaft coupling and drives the poking roller to rotate.

2. The rotary mincing fire door of claim 1, wherein, The elastic compression mechanism includes a first arm rod, a second arm rod, a counterweight rod, a counterweight block and a connecting rod; the first arm rod is arranged in the hopper and on the outer side of the arc guide plate, and the arm rod thereof abuts against the arc guide plate; the top end of the first arm rod is coaxially fixedly connected with one end of the second arm rod through the connecting rod, the two ends of the connecting rod are fixed in the hopper through bearings, and the connecting rod drives the first arm rod and the second arm rod to synchronously rotate when rotating; the other end of the second arm rod passes through the hopper and is hingedly connected with one end of the counterweight rod, and the counterweight block is fixed on the other end of the counterweight rod.

3. The rotary mincing fire door of claim 2, wherein, The two ends of the connecting rod are symmetrically provided with the first arm rod, the second arm rod, the counterweight rod and the counterweight block.

4. The fire door of claim 1, wherein, The poking roller includes a roller shaft and a plurality of inclined poking plates which are equidistantly distributed along the circumference of the roller shaft; the inclined poking plate and the axis of the roller shaft form an angle θ.

5. The rotary mincing fire door of claim 4, wherein, There are five inclined poking plates.

6. The fire door of claim 1, wherein The bottom openings of the two arc guide plates are larger than the outlet.

7. The fire door of claim 1, wherein The lower part of the wall of the hopper is inclined, so that the hopper body is folded towards the outlet.

8. The fire door of claim 1, wherein, An inlet guide plate is arranged on the inlet; the inlet guide plate is vertically downward along the inlet, and the bottom is inwardly bent and folded.

9. The fire door of claim 1, wherein, Two pairs of pull rings are symmetrically arranged on the outer wall of the hopper.

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