Slag removal mechanism for inner wall of boiler

Abstract

The utility model relates to the technical field of boiler deslagging, in particular to a deslagging mechanism for the inner wall of a boiler, which comprises a tool rest, a tool apron, a scraper, a pressure sensor, a spring, a pneumatic mechanism, an air pump, a pipe body A and an inflation head, the pneumatic mechanisms can be inflated / deflated at the same time through the air pump, the pneumatic mechanisms and the spring cooperate to act on the tool apron to move outwards / inwards during inflation / deflation, and then in the deslagging process, according to data fed back to the controller by the pressure sensor (the pressure sensor monitors the compression force of the spring in real time; and the controller controls the air pump to inflate / deflate in real time to dynamically adjust the position of the scraper, so that the scraper and the inner wall of the boiler are kept in a constant attaching force (overpressure or separation is avoided), and the device is suitable for scenes, such as small industrial boilers and biomass-fired boilers, where the slag amount is small and the boilers can be shut down regularly for slag removal.

Description

Technical Field

[0001] This utility model relates to the field of boiler slag removal technology, specifically to a slag removal mechanism for the inner wall of a boiler. Background Technology

[0002] During boiler operation, ash and slag produced by fuel combustion gradually adhere to the inner wall of the boiler, forming a hard slag layer. If not removed in time, this slag layer will reduce the boiler's heat transfer efficiency, increase energy consumption, and even lead to safety hazards such as localized overheating. Therefore, slag removal from the boiler's inner wall is crucial to maintaining the safe and stable operation of the boiler.

[0003] Currently, in some slag removal mechanisms that can be temporarily installed or disassembled, the scrapers of the existing slag removal mechanisms are either fixed or manually adjustable, or spring-pre-tightened scrapers are used. Such settings of the scrapers of the slag removal mechanism make it difficult to adjust them in real time according to the characteristics of the slag layer, which may lead to uneven scraping or excessive wear. Secondly, it is difficult to monitor the contact pressure between the scraper and the furnace wall, resulting in unstable slag removal effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a slag removal mechanism for the inner wall of a boiler, wherein the scraper of the slag removal mechanism can adaptively adjust in real time according to the characteristics and thickness of the boiler slag layer, so as to solve the technical problems described in the background art.

[0005] This utility model is achieved through the following technical solution:

[0006] A slag removal mechanism for the inner wall of a boiler includes a knife holder, in which a knife support is slidably mounted, and a scraper is fixedly mounted on the knife support, with the scraper extending out of the knife holder.

[0007] A pressure sensor and a spring are installed in the tool holder. The pressure sensor is fixedly connected to the tool holder, and the two ends of the spring abut against the pressure sensor and the tool holder, respectively.

[0008] The tool holder has a pneumatic mechanism and also includes an air pump. The output end of the air pump is equipped with a tube A. An inflation head is fixedly connected to the outward end of the tube A. The inflation head is connected to the pneumatic mechanism through a pipeline.

[0009] Furthermore, the pneumatic mechanism includes a cylinder integrally formed with the tool holder, a push rod slidably installed in the cylinder, one end of the push rod facing the tool holder, and a piston fixedly provided at the other end of the push rod, the piston being slidably and sealingly connected to the inner wall of the cylinder;

[0010] A connector is fixedly connected to the end of the cylinder away from the tool holder for the installation of pipelines.

[0011] Furthermore, the tool holder is mounted on a screw, and a mounting base is installed on the top of the screw. The screw can rotate horizontally relative to the mounting base, and a power source for driving the screw to rotate is fixedly connected to the top of the mounting base.

[0012] Furthermore, the tool holder includes a sleeve that engages with the screw drive. A fixing ring is fixedly provided on the outer circumference of the sleeve. A crossbar is fixedly provided on the outer circumference of the fixing ring. A vertical rod is fixedly connected to the end of the crossbar away from the fixing ring. A sliding groove is provided inside the vertical rod, and the tool holder is slidably installed in the sliding groove.

[0013] Furthermore, the crossbar has an inner cavity, and a tube B communicating with the inner cavity and the tube A is mounted on the crossbar;

[0014] A straw communicating with the inner cavity is also installed on the crossbar. A horn head is fixedly connected to one end of the straw that extends out of the inner cavity. A purification component is installed in the inner cavity. The purification component is located on the communication path between the tube body B and the end of the straw that extends into the inner cavity.

[0015] Furthermore, the purification assembly includes a filter screen and a filter bag that are fixedly installed at intervals in the inner cavity.

[0016] Furthermore, the bottom of the mounting base has a groove, in which a turntable is installed. The air pump is installed below the turntable, and the turntable is fixedly connected to the screw.

[0017] Furthermore, a plurality of mounting rods are fixedly provided on the circumferential surface of the mounting base, and a limit block is integrally formed at the end of the mounting rod away from the mounting base.

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

[0019] 1. This utility model allows the air pump to simultaneously charge / discharge multiple pneumatic mechanisms. During charging / discharging, the multiple pneumatic mechanisms and springs work together to move the blade holder outward / inward. Then, during the slag removal process, based on the data fed back to the controller by the pressure sensor (the pressure sensor monitors the compression force of the spring in real time, thereby indirectly calculating the contact pressure between the scraper and the inner wall of the boiler), the controller controls the air pump to charge / discharge and dynamically adjust the position of the scraper in real time, so that it maintains a constant contact force with the inner wall of the boiler (avoiding overpressure or detachment).

[0020] 2. When the air-filling pipeline of this utility model is closed and the pipe body B is open, the air pump and the suction pipe can be used to draw the dust gas generated during the slag removal process into the inner cavity, providing a good working environment for the slag removal process. The dust gas is filtered by the purification component and stored in the inner cavity, and can be taken out of the boiler along with the slag removal mechanism when it is disassembled.

[0021] 3. This utility model is installed by hoisting (the slag removal mechanism is installed manually after the boiler shutdown temperature drops to a certain temperature). During the installation process, the installation rod only needs to be inserted into the corresponding lug of the boiler for quick positioning and installation.

[0022] When the slag removal mechanism of this utility model is lifted out of the boiler, the screw is driven to rotate by the power source, and the knife holder is transmitted to the lower end of the screw. At this time, the knife holder acts as a support foot, which supports and places the slag removal mechanism. The slag removal mechanism can be placed vertically in the outside. This utility model is suitable for small industrial boilers, biomass boilers and other scenarios where the amount of slag is small and the boiler can be shut down for slag removal periodically. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the slag removal mechanism for the inner wall of a boiler according to this utility model.

[0024] Figure 2 This is a schematic diagram showing the installation position of the purification component of the slag removal mechanism for the inner wall of a boiler according to this utility model.

[0025] Figure 3 For the present utility model Figure 2 A magnified view of point A.

[0026] Figure 4 This is a schematic diagram showing the connection between the slag removal mechanism for the inner wall of a boiler and the boiler.

[0027] In the diagram: 1-Knife holder, 101-Sleeve, 102-Fixing ring, 103-Horizontal bar, 104-Vertical bar, 105-Slide groove, 106-Reinforcing bar, 2-Knife holder, 3-Scraper, 4-Pressure sensor, 5-Spring, 6-Pneumatic mechanism, 61-Cylinder, 62-Push rod, 63-Piston, 64-Connector, 7-Air pump, 8-Pipe body A, 9-Inflation head, 10-Screw, 11-Mounting base, 111-Bottom groove, 12-Power source, 13-Inner cavity, 14-Purification component, 141-Filter screen, 142-Filter bag, 15-Pipe body B, 16-Suction tube, 17-Flare head, 18-Turntable, 19-Mounting rod, 20-Limiting block, 21-Boiler, 22-Support lug. Detailed Implementation

[0028] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0029] In the description of this application, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure 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 application.

[0030] Please see Figure 1 This utility model provides a technical solution: a slag removal mechanism for the inner wall of a boiler, including a knife holder 1, the knife holder 1 being mounted on a screw 10, a mounting base 11 being mounted on the top of the screw 10, the screw 10 being able to rotate horizontally relative to the mounting base 11, and a power source 12 for driving the screw 10 to rotate being fixedly connected to the top of the mounting base 11, the power source 12 being a servo motor in the prior art.

[0031] The screw 10 is a threaded-helical composite shaft, with a threaded portion (for driving lifting) and a helical groove (not shown) parallel to or at a certain angle to the thread on its surface. The tool holder 1 has a ball mechanism that cooperates with the screw 10 and the helical groove. The ball assembly forms a clearance fit with the thread tooth side. Under load, the elastic deformation of the ball contacts the thread tooth side to transmit axial force. The helical groove is driven to rotate by the ball, realizing a non-meshing composite motion.

[0032] When the screw 10 rotates clockwise or counterclockwise under the drive of the power source 12, the spiral groove pushes the ball, and the tool holder 1 is forced to rotate around the screw 10. At the same time, due to the side effect of the thread, the tool holder 1 moves axially along the upper / lower axis of the screw 10, realizing dynamic slag scraping of the inner wall of the boiler 21 by a spiral trajectory. The specific structure of this driving method is relatively mature in the existing technology, and will not be described in detail here.

[0033] Please see Figure 1 and Figure 4 A plurality of mounting rods 19 are fixed on the circumferential surface of the mounting base 11. One end of the mounting rod 19 away from the mounting base 11 is integrally formed with a limiting block 20. The outer wall of the boiler 21 has a plurality of lugs 22 corresponding to the mounting rods 19. When the slag removal mechanism of this utility model is installed, the mounting rods 19 are inserted into the lugs 22 by means of hoisting. The mounting rods 19 stop moving under the obstruction of the limiting block 20, thereby making the mounting base 11 stably installed in the opening at the top of the boiler 21.

[0034] In addition, a threaded nut can be connected to the end of the mounting rod 19 to engage with the limiting block 20 to restrict the up and down movement of the mounting rod 19, ensuring that the mounting base 11 is stably installed, thereby ensuring that the slag removal work is carried out stably.

[0035] Please see Figure 1 , Figure 2 and Figure 4 The tool holder 1 includes a sleeve 101 that drives the screw 10. A fixing ring 102 is fixed on the outer circumference of the sleeve 101. Multiple horizontal bars 103 are horizontally fixed on the outer circumference of the fixing ring 102. A vertical bar 104 is vertically fixed to one end of each horizontal bar 103 away from the fixing ring 102. A reinforcing bar 106 is obliquely installed between the vertical bar 104 and the horizontal bar 103 to improve the structural strength of the slag removal mechanism. A sliding groove 105 is formed inside each vertical bar 104.

[0036] Please see Figure 3 A blade holder 2 is slidably installed in the slide groove 105. A scraper 3 is fixedly installed on the blade holder 2 and extends out of the slide groove 105. A pressure sensor 4 and a spring 5 are also installed in the slide groove 105. The pressure sensor 4 is fixed on the inner wall of the slide groove 105. The two ends of the spring 5 abut against the pressure sensor 4 and the blade holder 2, respectively. A tungsten carbide gasket can be installed between the pressure sensor 4 and the spring 5 to reduce friction loss. The pressure sensor 4 is used to monitor the compression force of the spring 5 in real time, thereby indirectly calculating the contact pressure between the scraper 3 and the inner wall of the boiler 21, dynamically adjusting the position of the scraper 3, and maintaining a constant contact force (avoiding overpressure or detachment).

[0037] Dynamic bonding can adapt to furnace wall deformation or changes in slag layer thickness, avoiding localized missed scraping caused by fixed gaps. Secondly, it increases pressure on sticky slag (such as molten ash) and reduces pressure on loose slag, avoiding energy waste caused by "unable to scrape" or "excessive scraping".

[0038] Please see Figure 1 and Figure 3 The outer side of the vertical rod 104 has multiple pneumatic mechanisms 6. Each pneumatic mechanism 6 includes a cylindrical body 61 integrally formed with the vertical rod 104. A push rod 62 is slidably installed in the cylindrical body 61. One end of the push rod 62 faces the knife holder 2, and the other end of the push rod 62 is fixedly provided with a piston 63. The piston 63 is slidably and sealingly connected to the inner wall of the cylindrical body 61. A connector 64 is fixedly connected to the end of the cylindrical body 61 away from the vertical rod 104 for pipeline installation.

[0039] Please see Figure 2The mounting base 11 has a bottom groove 111 at its bottom, in which a turntable 18 is installed. An air pump 7 is installed below the turntable 18, and the turntable 18 is fixedly connected to the screw 10. A pipe body A8 is installed at the output end of the air pump 7, and an air inlet 9 is fixedly connected to the outward end of the pipe body A8. The air inlet 9 has multiple interfaces and can be connected to multiple connectors 64 through pipelines. The air pump 7 can simultaneously inflate multiple pneumatic mechanisms 6. When inflating, the air pressure in the cylinder 61 increases, and multiple pistons 63 and push rods 62 are stably pushed by this pressure to move the knife holder 2 outward. Then, during the slag removal process, according to the data fed back to the controller by the pressure sensor 4, the controller controls the air pump 7 to inflate and push the scraper 3 out of the slide groove 105 in real time, dynamically adjusting the position of the scraper 3 to maintain a constant contact force with the inner wall of the boiler 21 (to avoid overpressure or detachment).

[0040] A solenoid valve (not shown) is installed on the pipe body A8 near the air inlet 9. When the solenoid valve is open, the air pump 7 inflates the pneumatic mechanism 6, pushing the scraper 3 to adhere to the inner wall of the boiler 21. When the pressure between the scraper 3 and the inner wall of the boiler 21 reaches a set value, the solenoid valve closes the pipeline to maintain a constant thrust. When retraction is required, the solenoid valve switches to the exhaust port to release the air pressure.

[0041] In addition, during the rotation of the tool holder 1, since the turntable 18 is fixedly connected to the screw 10, the turntable 18 rotates synchronously with the screw 10 when it rotates, thereby avoiding the entanglement of the connecting pipes between the multiple connectors 64 of the air inflator 9, and the length of its pipes is relatively long to meet the needs of the tool holder 1 to move up and down to remove slag.

[0042] Please see Figure 1 and Figure 2 The crossbar 103 has an inner cavity 13, and a tube body B15 is installed on the crossbar 103 to connect the inner cavity 13 and the tube body A8. A solenoid valve is installed on the tube body B15 to control the opening or closing of the tube body B15.

[0043] A suction tube 16 communicating with the inner cavity 13 is also installed on the crossbar 103. One end of the suction tube 16 extending out of the inner cavity 13 is fixedly connected to a horn head 17. When the tube body B15 is opened, the air pump 7, in cooperation with the suction tube 16, can suck the dust generated during the slag removal process into the inner cavity 13, providing a good working environment for the slag removal process. The horn head 17 can increase the contact area with air, resulting in better suction.

[0044] Please see Figure 2A purification assembly 14 is installed in the inner cavity 13. The purification assembly 14 is located on the communication path between the tube body B15 and the suction tube 16 extending into the inner cavity 13. The purification assembly 14 includes a filter screen 141 and a filter bag 142 fixedly installed at intervals in the inner cavity 13. The filter bag 142 is made of PPS (polyphenylene sulfide) fiber, which is acid-resistant and oxidation-resistant, and suitable for dust gas from coal / biomass boilers. The dust gas drawn into the inner cavity 13 is filtered sequentially by the filter screen 141 and the filter bag 142, respectively, to avoid damage to the air pump 7.

[0045] The end of the tube B15 can be further protected by a filter head. Impurities sucked into the inner cavity 13 can be taken out of the boiler 21 along with the slag removal mechanism when it is disassembled. The cover at the bottom of the crossbar 103 can be opened to clean the impurities in the inner cavity 13 or maintain the filter screen.

[0046] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A slagging mechanism for the inner wall of a boiler, characterized by: The utility model provides a kind of cutting tool, including tool rest (1), tool rest (1) slidably mounted with tool holder (2), tool holder (2) is fixedly installed with scraper (3), and scraper (3) extends tool rest (1); Pressure sensor (4) and spring (5) are installed in tool rest (1), pressure sensor (4) is fixedly connected with tool rest (1), and both ends of spring (5) are respectively abutted with pressure sensor (4) and tool holder (2); Pneumatic mechanism (6) is provided on tool rest (1), and air pump (7) is further included, the output end of air pump (7) is provided with pipe body A (8), one end of pipe body A (8) is fixedly connected with inflator head (9) outward, and inflator head (9) is connected by pipeline between pneumatic mechanism (6).

2. The slagging mechanism for the inner wall of a boiler according to claim 1, characterized in that: Pneumatic mechanism (6) includes cylinder (61) integrally formed with tool rest (1), and push rod (62) is slidably installed in cylinder (61); One end of push rod (62) is towards tool holder (2), and piston (63) is fixedly arranged at the other end of push rod (62), and piston (63) is slidably and sealingly connected with the inner wall of cylinder (61); The end of cylinder (61) away from tool rest (1) is fixedly connected with connector (64) for installing pipeline.

3. The slagging mechanism for the inner wall of a boiler according to claim 1, characterized in that: Tool rest (1) is installed on screw rod (10), and mounting seat (11) is installed on the top of screw rod (10), screw rod (10) can be relatively horizontally rotated with mounting seat (11), and power source (12) for driving screw rod (10) to rotate is fixedly connected on the top of mounting seat (11).

4. The slagging mechanism for the inner wall of a boiler according to claim 3, characterized in that: Tool rest (1) includes sleeve (101) in transmission cooperation with screw rod (10), fixed ring (102) is fixedly arranged on the outer circumferential surface of sleeve (101), and horizontal rod (103) is fixedly arranged on the outer circumferential surface of fixed ring (102); The end of horizontal rod (103) away from fixed ring (102) is fixedly connected with vertical rod (104), and sliding groove (105) is arranged in vertical rod (104), and tool holder (2) is slidably installed in sliding groove (105).

5. The slagging mechanism for the inner wall of a boiler according to claim 4, characterized in that: Horizontal rod (103) has inner cavity (13), and pipe body B (15) is installed on horizontal rod (103) and communicates with inner cavity (13) and pipe body A (8); Suction tube (16) is also installed on horizontal rod (103) and communicates with inner cavity (13), and the end of suction tube (16) extending out of inner cavity (13) is fixedly connected with horn head (17); Purification assembly (14) is installed in inner cavity (13), and purification assembly (14) is located on the communication path of pipe body B (15) and the end of suction tube (16) extending into inner cavity (13).

6. A slagging mechanism for the inner wall of a boiler according to claim 5, characterized in that: Purification assembly (14) includes filter screen (141) and filter bag (142) fixedly installed in inner cavity (13) with interval.

7. The slag removing mechanism for the inner wall of a boiler according to claim 3, characterized in that: The bottom of the mounting base (11) is provided with a bottom groove (111), a rotating disc (18) is mounted in the bottom groove (111), the air pump (7) is mounted below the rotating disc (18), and the rotating disc (18) is fixedly connected with the screw rod (10).

8. The slag removing mechanism for the inner wall of a boiler according to claim 3, characterized in that: A plurality of mounting rods (19) are fixed on the peripheral surface of the mounting base (11), and a limiting block (20) is integrally formed on the end of each mounting rod (19) away from the mounting base (11).

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