A gas heating system with convenient scale removal

Abstract

The application provides a gas heating system with convenient descaling, and belongs to the technical field of boilers. The technical scheme is as follows: a gas heating system with convenient descaling, comprising a boiler body, a water collecting tank and a water cooling wall, wherein the water cooling wall comprises a plurality of pipelines which are communicated with the boiler body and the water collecting tank, characterized in that, the inner wall of the boiler body and the inner wall of the water collecting tank are provided with tracks, a placing rack is slidably arranged in the track, and the track is located on both sides of the opening of the water cooling wall; and the system further comprises a scale cleaning mechanism which can be placed on the placing rack and used for cleaning the inner wall of the pipeline. The application has the beneficial effect that the water cooling wall of the boiler can be conveniently descaled, thereby achieving the purpose of energy saving.

Description

[0001] This case is a divisional application. The original application was entitled "An Energy-Saving Gas Heating System", with the application date being May 23, 2022, and the application number being CN202210560359.9. Technical Field

[0002] This invention belongs to the field of boiler technology, and in particular relates to a gas-fired heating system that facilitates descaling. Background Technology

[0003] After prolonged operation, boilers will develop scale buildup inside the water-cooled walls, especially in the horizontal sections where large amounts of scale accumulate. This scale buildup affects boiler heat exchange, leading to insufficient steam production from the steam drum, preventing the boiler from reaching its rated evaporation capacity, reducing the heat absorption of the water-cooled walls, decreasing efficiency, and wasting resources.

[0004] Currently, descaling of water-cooled walls generally involves chemical cleaning along with the boiler body. However, due to the small inner diameter of the water-cooled walls and the high water flow rate, the cleaning effect is poor. Summary of the Invention

[0005] The purpose of this invention is to provide a gas-fired heating system that can conveniently descale the water-cooled walls of a boiler.

[0006] The present invention is achieved through the following measures: a gas-fired heating system for easy descaling, comprising a boiler body, a water collection tank and a water-cooled wall, wherein the water-cooled wall comprises a plurality of pipes connecting the boiler body and the water collection tank, characterized in that a track is provided on the inner wall of the boiler body and the inner wall of the water collection tank, and a placement rack is slidably arranged in the track, the track being located on both sides of the opening of the water-cooled wall;

[0007] It also includes a scale removal mechanism that can be placed on the rack for cleaning the inner wall of the pipe.

[0008] The scale removal mechanism includes a cylindrical body and a cylindrical body sleeved on the outside of the cylindrical body, with ear plates symmetrically arranged on the outer side of the upper end of the cylindrical body;

[0009] It also includes a V-shaped rod with a curved end face, and a scraper is provided at the other end of the V-shaped rod. The connection of the V-shaped rod is rotatably mounted on the ear plate. The two sides of the circular cylinder are provided with openings that mate with one end of the V-shaped rod. The upper inner wall of the opening is provided with an arc-shaped groove that mates with the curved surface. An air passage is opened in the middle of the circular cylinder. The upper end of the air passage is connected to an upper air pipe through a rotary joint. The upper air pipe is connected to an air pump. The lower end of the air passage is connected to an air bag through a lower air pipe. The air bag includes a large-diameter part that can block the pipe and a small-diameter part that can extend into the cylinder. The lower end of the circular cylinder is provided with a top plate that can contact the upper end of the small-diameter part. The lower air pipe is located between the two top plates. A one-way valve is provided between the air bag and the lower air pipe. The rotary joint can achieve the effect of rotating the circular cylinder while keeping the upper air pipe stationary. This is existing technology and will not be described in detail here.

[0010] The air pump inflates the airbag via an upper air pipe, air passage, lower air pipe, and one-way valve. After inflation, the large-diameter portion of the airbag presses against the inner wall of the pipe, providing a sealing effect. The small-diameter portion lifts the top plate, which in turn moves the cylindrical body upwards. The arc-shaped groove and the curved surface work together to allow the scraper on the outer end of the V-shaped rod to press against the inner wall of the pipe. The combination of the arc-shaped groove and the opening creates space for one end of the V-shaped rod, ensuring that the end of the V-shaped rod does not detach from the arc-shaped groove and opening during the upward and repositioning of the cylindrical body.

[0011] It also includes a drive mechanism for rotating the cylindrical body. The drive mechanism includes a cylindrical support, on which the cylindrical body is rotatably mounted. An external gear ring is concentrically mounted on the upper end face of the cylindrical body. A drive gear that meshes with the external gear ring is rotatably mounted on the cylindrical support. The drive gear is driven by a motor with a reducer. The motor is fixed to the cylindrical support.

[0012] The lower air pipe includes a vertical section and a horizontal section. The lower end of the horizontal section is connected to the airbag. The lower end of the vertical section is provided with several air vents. A sealing ring that can block all the air vents is fitted on the outer side of the vertical section. The lower end of the sealing ring is fixedly connected to the support plate on the small diameter section through a support rod. The air vents can blow air onto the inner wall of the pipe.

[0013] A support plate is fixedly installed at the upper end of the small diameter section. The support plate is located below the top plate. The support rod is fixedly connected to the support plate. A strip-shaped opening is opened on the side wall of the cylinder to allow the support plate to move up and down.

[0014] The V-shaped rod is rotatably mounted on the ear plate via a shaft, and the axis of the shaft is spatially perpendicular to the axis of the cylinder.

[0015] The support plate is mounted on the cylinder by a spring.

[0016] The track includes two symmetrically arranged fixed rods, each with a T-slot running through it. A T-shaped slider slides within each T-slot, and a placement frame is fixed to these sliders. The placement frame has an arc-shaped support plate that mates with the cylinder body. After the scale removal mechanism detaches from the pipe, the cylinder body can be placed on the arc-shaped support plate. The T-shaped sliders can reach all the pipes of the water-cooled wall along the T-slots.

[0017] The upper air tube can be replaced by a hollow flexible shaft, which can improve strength. The included angle of the V-shaped rod is generally 70-90 degrees.

[0018] Working principle: When it is necessary to clean the water-cooled wall of the boiler, the horizontal section of the water-cooled wall will generally have more scale than the vertical section. Generally, the pipes in the horizontal section can be cleaned. Before cleaning, the boiler is stopped. Workers enter the boiler body or water collection tank through the inspection port and place the entire device inside the water-cooled wall pipes. Placement can be done manually (generally at the junction of the horizontal and vertical sections of the pipe), and the air pump is started to inflate the air bladder. Once full, the air bladder lifts the top plate via the support plate. The top plate moves the cylindrical body upwards. Since one end of the V-groove is located within the opening and arc-shaped groove, the arc-shaped groove and opening work together to lift one end of the V-shaped rod, causing it to rotate. This causes the other end of the V-shaped rod to expand outwards towards the inner wall of the pipe until the scraper touches the inner wall. Then, the motor is started, driving the drive gear to rotate. The drive gear drives the external gear ring to rotate, which in turn rotates the cylindrical body along the cylindrical support. The scraper then extends into the inner wall of the pipe to clean the scale. Since the large diameter section of the airbag is inflated and blocks the pipe, all the scale that has been scraped off is blocked by the airbag and will not fall below the airbag, thus preventing the scale from falling into the vertical section of the water-cooled wall after cleaning.

[0019] Then, by pulling the upper air tube, the device is gradually moved towards the outlet of the pipe. During the pulling process, the scraper continuously cleans the inner wall of the pipe, while the airbag carries away the scraped scale.

[0020] In addition, when the airbag lifts the top plate, the sealing ring is also lifted and disengaged from the vent. Since the airbag is equipped with a one-way valve, most of the gas will pass through the vent and blow air onto the inner wall of the pipe, further improving the cleaning effect.

[0021] When another pipe needs to be cleaned, the device can be placed on the curved plate and the placement rack can be pushed along the track until the other pipe is reached, avoiding manual carrying. The track is located at the opening of the water-cooled wall, making it convenient to place the device inside the pipe to be cleaned.

[0022] When the entire pipeline needs to be cleaned, this device can be driven by an existing robot capable of moving inside the pipeline.

[0023] Compared with existing technologies, the beneficial effects of this invention are: it can assist in the manual cleaning of water-cooled wall pipes, especially for horizontal pipe sections with a lot of scale; the scale is removed through the combination of a rotating scraper and air; the airbag can both position the scraper and seal the inner wall of the pipe to block the scale being removed; the cleaning of scale on the water-cooled wall improves the overall heating system effect, thereby saving resources. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 This is a structural diagram of the shelf;

[0027] Figure 4 This is a schematic diagram of the structure placed inside the pipe;

[0028] Figure 5 A schematic diagram of the scale removal mechanism;

[0029] Figure 6 To and Figure 5 Schematic diagrams of structures at different angles;

[0030] Figure 7 A schematic diagram of the internal structure of the airbag, cylinder, and cylindrical body;

[0031] Figure 8 A structural schematic diagram of a circular cylinder and its related components;

[0032] Figure 9 This is a structural diagram of the airbag and support plate;

[0033] Figure 10 This is a schematic diagram of the V-shaped rod.

[0034] The attached figures are labeled as follows: 1. Circular cylinder; 2. Shell; 3. Cylindrical support; 4. V-shaped rod; 5. Scraper; 6. Airbag; 7. Support plate; 8. Air passage; 9. Fixing rod; 10. Boiler body; 11. Water collection tank; 12. Sealing ring; 101. Opening; 102. Arc groove; 103. External gear ring; 104. Top plate; 201. Ear plate; 202. Strip opening; 301. Drive gear; 302. Motor; 601. Large diameter section; 602. Small diameter section; 701. Spring; 801. Lower air pipe; 802. Rotary joint; 803. Vent hole; 901. T-slot; 902. Placement rack; 903. Arc-shaped support plate; 904. T-slider; 1001. Pipe; 1201. Support rod. Detailed Implementation

[0035] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0036] Example 1:

[0037] A gas-fired heating system for easy descaling includes a boiler body 10, a water collection tank 11, and a water-cooled wall. The water-cooled wall includes a plurality of pipes 1001 connecting the boiler body 10 and the water collection tank 11. The system is characterized in that a track is provided on the inner wall of the boiler body 10 and the inner wall of the water collection tank 11, and a placement rack 902 is slidably arranged in the track. The track is located on both sides of the opening 101 of the water-cooled wall.

[0038] It also includes a scale removal mechanism that can be placed on the rack 902 for cleaning the inner wall of the pipe 1001.

[0039] The scale removal mechanism includes a cylindrical body 1 and a cylindrical body 2 sleeved on the outside of the cylindrical body 1. Ear plates 201 are symmetrically arranged on the outer side of the upper end of the cylindrical body 2.

[0040] It also includes a V-shaped rod 4 with a curved end face, and a scraper 5 is provided at the other end of the V-shaped rod 4. The connection of the V-shaped rod 4 is rotatably mounted on the ear plate 201. The two sides of the cylindrical body 1 are provided with openings 101 that cooperate with one end of the V-shaped rod 4. The upper inner wall of the opening 101 is provided with an arc groove 102 that cooperates with the curved surface. An air passage 8 is opened in the middle of the cylindrical body 1. The upper end of the air passage 8 is connected to an upper air pipe through a rotary joint 802. The upper air pipe is connected to an air pump. The lower end of the air passage 8 is connected to an air bag 6 through a lower air pipe 801. The air bag 6 includes a large diameter part 601 that can block the pipe 1001 and a small diameter part 602 that can extend into the inside of the cylinder 2. The lower end of the cylindrical body 1 is provided with a top plate 104 that can contact the upper end of the small diameter part 602. The lower air pipe 801 is located between the two top plates 104. A one-way valve is provided between the air bag 6 and the lower air pipe 801.

[0041] The air pump inflates the airbag 6 via the upper air pipe, airway 8, lower air pipe 801, and one-way valve. After inflation, the large-diameter portion 601 of the airbag 6 can press against the inner wall of the pipe 1001 and act as a seal, while the small-diameter portion 602 can lift the top plate 104. The top plate 104 drives the cylindrical body 1 to move upward. The arc groove 102 and the curved surface cooperate to allow the scraper 5 on the outer end of the V-shaped rod 4 to press against the inner wall of the pipe 1001. The cooperation between the arc groove 102 and the opening 101 forms a space for placing one end of the V-shaped rod 4, ensuring that one end of the V-shaped rod 4 does not detach from the arc groove 102 and the opening 101 during the upward movement and repositioning of the cylindrical body 1.

[0042] It also includes a drive mechanism for driving the cylindrical body 1 to rotate. The drive mechanism includes a cylindrical support 3. The cylindrical body 1 is rotatably mounted on the cylindrical support 3. An external gear ring 103 is concentrically mounted on the upper end face of the cylindrical body 1. An active gear 301 that meshes with the external gear ring 103 is rotatably mounted on the cylindrical support 3. The active gear 301 is driven by a motor 302 with a reducer.

[0043] A support plate 7 is fixedly installed at the upper end of the small diameter section 602. The support plate 7 is located below the top plate 104. The support rod 1201 is fixedly connected to the support plate 7. A strip-shaped opening 202 is opened on the side wall of the cylinder 2 to allow the support plate 7 to move up and down.

[0044] V-shaped rod 4 is rotatably mounted on ear plate 201 via a shaft, and the axis of the shaft is spatially perpendicular to the axis of cylinder 2.

[0045] The support plate 7 is mounted on the cylinder 2 via a spring 701.

[0046] The track includes two symmetrically arranged fixed rods 9, each with a T-slot 901 extending through it. T-sliders 904 slide within each T-slot 901. A placement frame 902 is fixed to the two T-sliders 904. The placement frame 902 has an arc-shaped support plate 903 that mates with the cylinder 2. After the scale removal mechanism detaches from the pipe 1001, the cylinder 2 can be placed on the arc-shaped support plate 903. The T-sliders 904 can reach all the pipes 1001 of the water-cooled wall along the T-slots 901.

[0047] The upper trachea can be replaced with a hollow flexible shaft, which can improve its strength. The included angle of the V-shaped rod 4 is generally 70-90 degrees.

[0048] Working Principle: When cleaning the water-cooled walls of a boiler, the horizontal sections generally have more scale than the vertical sections. Cleaning can typically be done through the horizontal section pipe 1001. Before cleaning, the boiler is stopped. Workers enter the boiler body 10 or water collection tank 11 through the inspection port and place the entire device into the water-cooled wall pipe 1001. The placement of the device can be done manually (generally at the connection between the horizontal and vertical sections of pipe 1001), which will not be detailed here. The air pump is then started to inflate the air bladder 6. Once the air bladder 6 is full, it lifts the top plate 104 via the support plate 7. The top plate 104 then moves the circular cylinder 1 upwards. Due to the V-groove, one end is... Within the opening 101 and the arc-shaped groove 102, the cooperation between the arc-shaped groove 102 and the opening 101 lifts one end of the V-shaped rod 4, causing the V-shaped rod 4 to rotate. This causes the other end of the V-shaped rod 4 to expand outwards towards the inner wall of the pipe 1001 until the scraper 5 rests against the inner wall of the pipe 1001. Then, the motor 302 is started, driving the drive gear 301 to rotate. The drive gear 301 drives the outer gear ring 103 to rotate, which in turn drives the cylindrical body 1 to rotate along the cylindrical support 3. The scraper 5 then extends into the inner wall of the pipe 1001 to clean the scale inside. Because the large-diameter section 601 of the airbag 6 is inflated and blocks the pipe 1001, all the scraped scale is blocked by the airbag 6 and will not fall below the airbag 6, thus preventing the cleaned scale from falling into the vertical section of the water-cooled wall.

[0049] Then, by pulling the upper air tube, the device is gradually moved towards the outlet of pipe 1001. During the pulling process, the scraper 5 continuously cleans the inner wall of pipe 1001, while the airbag 6 carries away the scraped scale.

[0050] When another pipe 1001 needs to be cleaned, the device can be placed on the curved plate and the placement rack 902 can be pushed along the track until the other pipe 1001 is reached, avoiding manual carrying. The track is located at the opening 101 of the water-cooled wall, making it convenient to place the device inside the pipe 1001 to be cleaned.

[0051] Example 2:

[0052] Based on Embodiment 1, the lower air pipe 801 includes a vertical section and a horizontal section. The lower end of the horizontal section is connected to the airbag 6. The lower end of the vertical section is provided with a number of air vents 803. A sealing ring 12 that can block all the air vents 803 is sleeved on the outside of the vertical section. The lower end of the sealing ring 12 is fixedly connected to the support plate 7 on the small diameter section 602 through the support rod 1201. The air vents 803 can blow air onto the inner wall of the pipe 1001.

[0053] When the airbag 6 lifts the top plate 104, the sealing ring 12 is also lifted and disengaged from the vent hole 803. Since the airbag 6 is equipped with a one-way valve, most of the gas will pass through the vent hole 803 to blow air onto the inner wall of the pipe 1001, further improving the cleaning effect.

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A gas-fired heating system for easy descaling, comprising a boiler body, a water collection tank, and a water-cooled wall, wherein the water-cooled wall includes a plurality of pipes connecting the boiler body and the water collection tank, characterized in that, Tracks are provided on the inner wall of the boiler body and the inner wall of the water collection tank. A placement rack is slidably arranged in the tracks, and the tracks are located on both sides of the opening of the water-cooled wall. It also includes a scale removal mechanism that can be placed on the rack for cleaning the inner wall of the pipe; The scale removal mechanism includes a cylindrical body and a cylindrical body sleeved on the outside of the cylindrical body, with ear plates symmetrically arranged on the outer side of the upper end of the cylindrical body; It also includes a V-shaped rod with a curved end face, and a scraper is provided at the other end of the V-shaped rod. The connection of the V-shaped rod is rotatably mounted on the ear plate. The two sides of the circular cylinder are provided with openings that mate with one end of the V-shaped rod. The upper inner wall of the opening is provided with an arc-shaped groove that mates with the curved surface. An air passage is opened in the middle of the circular cylinder. The upper end of the air passage is connected to an upper air pipe through a rotary joint. The upper air pipe is connected to an air pump. The lower end of the air passage is connected to an air bag through a lower air pipe. The air bag includes a large-diameter part that can block the pipe and a small-diameter part that can extend into the cylinder. The lower end of the circular cylinder is provided with a top plate that can contact the upper end of the small-diameter part. The lower air pipe is located between the two top plates. A one-way valve is provided between the air bag and the lower air pipe. The air pump inflates the airbag through the upper air pipe, air passage, lower air pipe and one-way valve. After the airbag is inflated, the large-diameter part can press against the inner wall of the pipe and play a sealing role. The small-diameter part can lift the top plate. The top plate drives the circular cylinder to move upward. The arc groove and the curved surface cooperate to allow the scraper on the outer end of the V-shaped rod to press against the inner wall of the pipe. It also includes a drive mechanism for driving the circular cylinder to rotate. The drive mechanism includes a cylindrical bracket. The circular cylinder is rotatably mounted on the cylindrical bracket. An external gear ring is concentrically mounted on the upper end face of the circular cylinder. A drive gear that meshes with the external gear ring is rotatably mounted on the cylindrical bracket. The drive gear is driven by a motor with a reducer. The lower air pipe includes a vertical section and a horizontal section. The lower end of the horizontal section is connected to the airbag. The lower end of the vertical section is provided with several vent holes. A sealing ring capable of sealing all the vent holes is sleeved on the outer side of the vertical section. A support plate is fixedly provided at the upper end of the small-diameter section. The support plate is located below the top plate and is spring-loaded onto the cylinder. A strip-shaped opening is opened on the side wall of the cylinder to allow the support plate to move up and down. The lower end of the sealing ring is fixedly connected to the support plate on the small-diameter section via a support rod. The vent holes can blow air onto the inner wall of the pipe.

2. The gas heating system for easy descaling according to claim 1, characterized in that, The V-shaped rod is rotatably mounted on the ear plate via a shaft, and the axis of the shaft is spatially perpendicular to the axis of the cylinder.

3. The gas heating system for easy descaling according to claim 1, characterized in that, The track includes two symmetrically arranged fixed rods, each with a T-shaped groove running through it. T-shaped sliders are slidably arranged in both T-shaped grooves. The placement frame is fixed on the two T-shaped sliders. The placement frame is provided with an arc-shaped support plate that cooperates with the cylinder. After the scale removal mechanism is detached from the pipe, the cylinder can be placed on the arc-shaped support plate.

Images