Anti-blocking boiler ash outlet pipe
By combining a scraper structure and a hydraulic pusher inside the boiler ash discharge pipe, bidirectional ash discharge and non-stop maintenance of the boiler ash discharge pipe are achieved, solving the problems of ash discharge pipe blockage and maintenance, and improving the operating efficiency and maintenance convenience of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-04-07
AI Technical Summary
The ash discharge pipes of existing boilers are prone to clogging, requiring shutdown for maintenance and offering poor maintainability.
The movable rod with a scraper structure is driven by a hydraulic push rod to slide the scraper inside the boiler ash discharge pipe, achieving bidirectional ash discharge, avoiding blockage, and allowing maintenance to be performed without shutting down the boiler.
It effectively reduces boiler ash discharge pipe blockage, improves maintainability, ensures normal boiler operation, and does not affect the maintenance time of the ash discharge system.
Smart Images
Figure CN224094493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an anti-clogging boiler ash outlet pipe. Background Technology
[0002] Thermal power generation is one of the world's main methods of power generation, and its core equipment is the boiler. The boiler heats water into high-temperature, high-pressure steam by burning fossil fuels (such as coal and natural gas), which then drives a steam turbine to generate electricity.
[0003] my country has abundant coal resources, so thermal power generation mainly uses coal. Coal is processed into pulverized coal through crushing, which is then fed directly into the furnace of the boiler through a coal feeder and pipeline. After complete combustion, the pulverized coal is pushed to the ash outlet and discharged through the ash outlet and ash discharge pipe.
[0004] In the existing technology, the ash discharge pipe is a horizontal pipe that pushes out the coal ash that falls into the pipe (the pushing mainly relies on the spiral push. Because the furnace ash is at a high temperature, in order to avoid the spiral blades from getting stuck due to thermal expansion, the distance between the outer periphery of the spiral blades and the ash discharge pipe is relatively large, which makes it easy for a lot of furnace ash to accumulate. The accumulated furnace ash comes into contact with the running spiral blades, causing the spiral blades to wear out quickly).
[0005] Furthermore, the spiral blades use unidirectional ash discharge, so their maintainability is relatively poor, and the boiler needs to be shut down when maintenance is required.
[0006] Based on the above problems, we designed a clog-proof boiler ash discharge pipe that can be maintained without shutting down the boiler, and can discharge ash in both directions to reduce the chance of blockage. Utility Model Content
[0007] The technical problem to be solved by this utility model is to provide a boiler ash discharge pipe that can be maintained without shutting down the machine, and can discharge ash in both directions to reduce the chance of blockage.
[0008] To solve the above problems, the present invention adopts the following technical solution:
[0009] A clog-resistant boiler ash discharge pipe includes a pipe structure connected to the primary ash discharge port of the boiler, and a movable rod inserted within the pipe structure. Two scraper structures are mounted on the movable rod. Two secondary ash discharge ports are located at the bottom of the pipe structure. An extension pipe is welded to the bottom of each secondary ash discharge port, and a slide valve is connected via a flange on the extension pipe. When the two scraper structures are positioned between the two secondary ash discharge ports, the pipe structure is in a closed state. When the scraper structures shift to one side, boiler ash is scraped into the secondary ash discharge port through the scraper structures. A hydraulic push rod is installed outside the pipe structure to drive the movable rod to slide.
[0010] Preferably, the pipe structure includes a pipe body, a connecting pipe welded at the top middle position of the pipe body, the upper end of the connecting pipe connecting to the primary ash outlet of the boiler, tapered pipes installed at both ends of the pipe body, the diameter of the tapered pipes gradually increasing towards the pipe body, an ash cleaning port opened on the outer wall of the tapered pipe, and a cover detachably installed at the ash cleaning port; a shaft tube is provided at the axis of the tapered pipe, and the movable rod passes through the shaft tube.
[0011] Preferably, the arc of the secondary ash outlet is 1π.
[0012] Preferably, air blowing pipes are installed at the top of the pipe body, on both sides of the secondary ash outlet.
[0013] Preferably, a stepped hole is machined at the opening of the shaft tube, and a shaft cover is threaded through the stepped hole. A sealing packing is clamped through the shaft cover. The sealing packing is limited by the stepped surface of the stepped hole. After being compressed by the shaft cover, the sealing packing forms a seal with the movable rod. The movable rod and the shaft cover are in clearance fit.
[0014] Preferably, the scraper structure includes two scrapers, with annular grooves machined on the opposite surfaces of the two scrapers, and an annular ceramic plate fitting between the two scrapers. A connecting sleeve is integrally formed at the end of the scraper away from the ceramic plate, and the connecting sleeve is fixed to the movable rod. The outer end face of the scraper is clearance-fitted with the inner wall of the pipe body, and the gap between the outer end face of the ceramic plate and the inner wall of the pipe body is less than 1 mm.
[0015] The beneficial effects of this utility model are:
[0016] One advantage is that this device uses a scraper structure to remove dust from the pipe body, thus preventing blockage.
[0017] Secondly, the displacement of the scraper structure can avoid the secondary ash outlets on both sides, which can increase the boiler's heat preservation effect.
[0018] Thirdly, this device can close one secondary ash outlet while keeping the other secondary ash outlet open through the cooperation of the scraper structure. At this time, the secondary ash outlet on the closed side can be maintained without affecting the normal ash discharge of the boiler, which facilitates the maintenance of the ash discharge system and does not delay the operation of the boiler.
[0019] Fourthly, this device uses a scraper structure for dust removal, which can prevent dust accumulation inside the pipeline. Furthermore, the scraper structure is detachable and replaceable, making it more maintainable.
[0020] Fifthly, this device has a simple structure and high overall integrity, making it suitable for widespread use. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a partial schematic diagram of the present invention;
[0024] Figure 3 This is a schematic diagram showing the movable rod moving to the right.
[0025] Figure 4 This is a schematic diagram showing the movable rod when it is displaced to the left.
[0026] Figure 5 A diagram showing the movement lever when it is centered;
[0027] Figure 6 This is a magnified view of point A;
[0028] Figure 7 This is a magnified view of point B;
[0029] Figure 8 This is a schematic diagram of the scraper structure. Detailed Implementation
[0030] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0031] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0032] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0035] See Figures 1 to 4 The illustrated anti-clogging boiler ash discharge pipe includes a pipe structure 1 connected to the primary ash discharge port of the boiler, and a movable rod 2 movably inserted within the pipe structure 1. Two scraper structures 3 are provided on the movable rod 2. Two secondary ash discharge ports 4 are provided at the bottom of the pipe structure 1. An extension pipe port 41 is welded to the bottom of the secondary ash discharge port 4, and a slide valve 5 is connected to the extension pipe port 41 through a flange. When the two scraper structures 3 are located between the two secondary ash discharge ports 4, the pipe structure 1 is in a closed state. When the scraper structures 3 are displaced to one side, the ash is scraped into the secondary ash discharge port 4 through the scraper structures 3. A hydraulic push rod 6 is installed on the outside of the pipe structure 1 to drive the movable rod 2 to slide.
[0036] In the above technical solution, the hydraulic push rod 6 is installed by means of a hoisting platform 61, and the pipeline structure 1 is also installed by means of hoisting.
[0037] When there is not much ash in the boiler and the boiler needs to be kept warm, the hydraulic push rod 6 pushes the movable rod 2 to move, so that the two scraper structures 3 are moved between the two secondary ash outlets 4. At this time, the ash discharged from the boiler enters the pipe structure 1 and is located between the two scraper structures 3. It will not be discharged directly, which is equivalent to sealing the primary ash outlet of the boiler and playing a role in keeping the boiler warm.
[0038] When ash removal is required, the hydraulic push rod 6 drives the movable rod 2 to move back and forth. During the movement, the furnace ash is pushed by the two scraper structures 3 and discharged from the secondary ash outlets 4 on both sides.
[0039] It should be noted that the moving speed of the movable rod 2 needs to be controlled at 2~4 meters / minute. The relatively slow movement allows the furnace ash to be effectively pushed into the secondary ash outlet 4, reducing the possibility of the furnace ash being carried over the secondary ash outlet 4 by the scraper structure 3.
[0040] During the full combustion process in the boiler, the movable rod 2 remains in an active state to prevent ash accumulation inside the pipe structure 1.
[0041] See Figure 3 and Figure 4 As shown, when the two scraper structures 3 are located on both sides of one of the secondary ash outlets 4, the secondary ash outlet 4 is closed, and the furnace ash is discharged from the other secondary ash outlet 4, which facilitates the cleaning of the closed secondary ash outlet 4. It should be noted that during the closure period, the movable rod 2 remains stationary, and the secondary ash outlet 4 on the other side uses gravity to discharge ash. Therefore, the maintenance time needs to be controlled within a safe time to avoid blockage of the pipeline structure 1 due to long-term ash accumulation and the inability of gravity to discharge ash smoothly.
[0042] See Figure 2 and Figure 6 As shown, the pipe structure 1 includes a pipe body 11, a connecting pipe 12 welded at the top middle position of the pipe body 11, the upper end of the connecting pipe 12 connecting to the primary ash outlet of the boiler, tapered pipes 13 installed at both ends of the pipe body 11, the diameter of the tapered pipes 13 gradually increasing towards the pipe body, a cleaning port 14 opened on the outer wall of the tapered pipes 13, and a cover 15 detachably installed at the cleaning port 14; a shaft tube 16 is provided at the axis of the tapered pipes 13, and the movable rod 2 passes through the shaft tube 16.
[0043] In the above technical solution, the ash removal port 14 faces downward and is located at the lowest point of the conical tube 13. During the full combustion of the boiler, the ash removal port 14 can be kept open so as to discharge the furnace ash that is accidentally brought over by the scraper structure 3.
[0044] The tapered tube 13 design allows for better ash collection compared to straight tubes.
[0045] See Figure 3 As shown, the arc of the secondary ash outlet 4 is 1π.
[0046] By using a secondary ash outlet 4 with a relatively large arc, the furnace ash can be effectively scraped out from the secondary ash outlet 4 during the operation of the scraper structure 3.
[0047] See Figure 2 As shown, air blowing pipes 121 are installed at the top of the pipe body 11, on both sides of the secondary ash outlet 4.
[0048] The air blowing pipe 121 is connected to a high-pressure air pipe, and the end is connected to a high-pressure device. If necessary, the high-pressure airflow is blown out by the high-pressure device to remove dust from the inner wall of the scraper structure 3 and the pipe body 1.
[0049] See Figure 3 and Figure 7 As shown, a stepped hole 161 is machined at the opening of the shaft tube 16. A shaft cover 162 is threaded through the stepped hole. A sealing packing 163 is clamped through the shaft cover 162. The sealing packing 163 is limited by the stepped surface of the stepped hole. After being compressed by the shaft cover 162, the sealing packing 163 forms a seal with the movable rod 2. The movable rod 2 and the shaft cover 162 are in clearance fit.
[0050] The above technical solution is mainly aimed at increasing the sealing performance of the movable rod 2.
[0051] See Figure 8 As shown, the scraper structure 3 includes two scrapers 31. Annular grooves 32 are machined on the opposing surfaces of the two scrapers 31. An annular ceramic plate 33 fits between the two scrapers 31. A connecting sleeve 34 is integrally formed at the end of the scraper 31 away from the ceramic plate 33. The connecting sleeve 34 is fixed to the movable rod 2. The outer end face of the scraper 31 is clearance-fitted with the inner wall of the pipe body 1. The gap between the outer end face of the ceramic plate 33 and the inner wall of the pipe body 1 is less than 1 mm.
[0052] In the above technical solution, a structure is adopted in which two scrapers 31 are used to clamp the ceramic plate 33. The ceramic plate 33 itself is resistant to high temperature and has a low coefficient of thermal expansion, so it can meet the needs of scraping furnace ash, and will not be heated to the point of hard friction with the inner wall of the pipe body 1.
[0053] The use of two scrapers 31 in a clamping configuration makes the ceramic plate 33 replaceable.
[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0057] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0058] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A clog-resistant boiler ash discharge pipe, characterized in that: The system includes a pipe structure connected to the primary ash outlet of the boiler, and a movable rod inserted within the pipe structure. Two scraper structures are mounted on the movable rod. Two secondary ash outlets are located at the bottom of the pipe structure. An extension pipe is welded to the bottom of each secondary ash outlet, and a slide gate valve is connected to the extension pipe flange. When the two scraper structures are located between the two secondary ash outlets, the pipe structure is in a closed state. When the scraper structures are displaced to one side, ash is scraped into the secondary ash outlet through the scraper structures. A hydraulic push rod is installed outside the pipe structure to drive the movable rod to slide.
2. The anti-clogging boiler ash outlet pipe according to claim 1, characterized in that: The pipeline structure includes a pipeline body, a connecting pipe welded at the top middle position of the pipeline body, the upper end of the connecting pipe connecting to the primary ash outlet of the boiler, tapered pipes installed at both ends of the pipeline body, the diameter of the tapered pipes gradually increasing towards the pipeline body, ash cleaning ports opened on the outer wall of the tapered pipes, and detachable covers installed at the ash cleaning ports; a shaft tube is provided at the axis of the tapered pipes, and the movable rod passes through the shaft tube.
3. The anti-clogging boiler ash outlet pipe according to claim 2, characterized in that: The arc of the secondary ash outlet is 1π.
4. The anti-clogging boiler ash outlet pipe according to claim 3, characterized in that: At the top of the pipe body, air blowing pipes are installed on both sides of the secondary ash outlet.
5. The anti-clogging boiler ash outlet pipe according to claim 2, characterized in that: The shaft tube has a stepped hole at its opening, through which a shaft cover is threaded. A sealing packing is clamped in the shaft cover, and the sealing packing is limited by the stepped surface of the stepped hole. After being compressed by the shaft cover, the sealing packing forms a seal with the movable rod, and the movable rod is clearance-fitted with the shaft cover.
6. The anti-clogging boiler ash outlet pipe according to claim 2, characterized in that: The scraper structure includes two scrapers, with annular grooves machined on the opposite surfaces of the two scrapers. An annular ceramic plate fits between the two scrapers. A connecting sleeve is integrally formed at the end of the scraper away from the ceramic plate. The connecting sleeve is fixed to the movable rod. The outer end face of the scraper is clearance-fitted with the inner wall of the pipe body. The gap between the outer end face of the ceramic plate and the inner wall of the pipe body is less than 1mm.