CN114777556B - Energy-saving gas heating system - Google Patents
Energy-saving gas heating system Download PDFInfo
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- CN114777556B CN114777556B CN202210560359.9A CN202210560359A CN114777556B CN 114777556 B CN114777556 B CN 114777556B CN 202210560359 A CN202210560359 A CN 202210560359A CN 114777556 B CN114777556 B CN 114777556B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides an energy-saving gas heating system, and belongs to the technical field of boilers. The technical scheme is as follows: an energy-saving gas heating system comprises a boiler body, a water collecting tank and a water-cooled wall, wherein the water-cooled wall comprises a plurality of pipelines communicated with the boiler body and the water collecting tank; the scale cleaning mechanism can be placed on the placing rack and used for cleaning the inner wall of the pipeline. The invention has the beneficial effects that: the descaling is conveniently carried out on the water-cooled wall of the boiler, so that the purpose of saving energy is achieved.
Description
Technical Field
The invention belongs to the technical field of boilers, and particularly relates to an energy-saving gas heating system.
Background
The boiler can cause the inner part of the water wall to be scaled after long-time operation, and particularly a large amount of scale can be accumulated at the horizontal section of the water wall. The heat exchange of the boiler can be influenced after the water-cooled wall is scaled, so that the steam production of the steam drum is insufficient, the boiler cannot reach the rated evaporation capacity, the heat absorption capacity of the water-cooled wall is reduced, the efficiency is reduced, and the resource waste is caused.
At present, chemical cleaning is generally adopted for descaling of a water-cooled wall and is processed along with a boiler body, and the water-cooled wall has smaller inner diameter, faster water flow speed and poor cleaning effect.
Disclosure of Invention
The invention aims to provide an energy-saving gas heating system which can conveniently scale a water-cooled wall of a boiler.
The invention is realized by the following measures: an energy-saving gas heating system comprises a boiler body, a water collecting tank and a water-cooled wall, wherein the water-cooled wall comprises a plurality of pipelines communicated with the boiler body and the water collecting tank;
the scale cleaning mechanism can be placed on the placing frame and used for cleaning the inner wall of the pipeline.
The scale cleaning mechanism comprises a circular cylinder and a cylinder body sleeved on the outer side of the circular cylinder, and lug plates are symmetrically arranged on the outer side of the upper end of the cylinder body;
the air bag type air compressor is characterized by further comprising a V-shaped rod with a curved end face, a scraper is arranged at the other end of the V-shaped rod, the connecting part of the V-shaped rod is rotatably arranged on the lug plate, openings matched with one end of the V-shaped rod are formed in two sides of the circular cylinder, an arc-shaped groove matched with the curved surface is formed in the inner wall of the upper end of each opening, an air passage is formed in the middle of the circular cylinder, the upper end of the air passage is connected with an upper air pipe through a rotary joint, the upper air pipe is connected with an air pump, the lower end of the air passage is connected with an air bag through a lower air pipe, the air bag comprises a large-diameter part capable of plugging the pipeline and a small-diameter part capable of extending into the cylinder, a top plate capable of being in contact with the upper end of the small-diameter part is arranged at the lower end of the circular cylinder, the lower air pipe is located between the two top plates, and a one-way valve is arranged between the air bag and the lower air pipe; the rotary joint can realize the effect that the circular cylinder rotates and the upper air pipe does not rotate, and is the prior art and is not described herein again;
the air pump is past through last trachea, air flue, trachea and check valve down the gasbag is aerifyd, the gasbag is aerifyd the back big diameter portion can push up on the inner wall of pipeline and play the shutoff effect, small diameter portion can with roof jack-up, the roof drives circular cylinder shifts up, the arc wall with the curved surface cooperation makes scraper in the V type pole outer end can push up on the inner wall of pipeline. The arc-shaped groove and the opening are matched to form a space for placing one end of the V-shaped rod, so that one end of the V-shaped rod cannot be separated from the arc-shaped groove and the opening in the process of moving up and resetting the circular column.
Still including the drive circular cylinder pivoted actuating mechanism, actuating mechanism includes the shell type support, the circular cylinder rotates to be set up on the shell type support, the up end of circular cylinder is concentric and fixed be provided with outer ring gear, rotate on the shell type support be provided with outer ring gear meshed's driving gear, the driving gear is through the motor drive who has the reduction gear. The motor is fixed on the cylindrical bracket.
The lower trachea includes vertical section and horizontal segment, the lower extreme of horizontal segment with the gasbag is connected, the lower extreme of vertical section is provided with a plurality of bleeder vents, the sealing washer that can shutoff all bleeder vents has been cup jointed in the outside of vertical section, the lower extreme of sealing washer pass through the bracing piece with the path of a small circle portion, the bleeder vent can blow to the inner wall of pipeline.
The upper end of the small-diameter part is fixedly provided with a supporting plate, the supporting rod is fixedly connected with the supporting plate, and a strip-shaped opening allowing the supporting plate to move up and down is formed in the side wall of the barrel.
The V-shaped rod is rotatably arranged on the V-shaped rod through a shaft, and the axis of the shaft is perpendicular to the axis space of the cylinder.
The support plate is arranged on the barrel through a spring.
The scale cleaning mechanism comprises a track and is characterized in that the track comprises two fixing rods symmetrically arranged, T-shaped grooves are formed in the fixing rods in a penetrating mode, T-shaped sliding blocks are arranged in the T-shaped grooves in a sliding mode, the placing rack is fixed to the T-shaped sliding blocks, an arc-shaped supporting plate matched with the barrel is arranged on the placing rack, and the barrel can be placed on the arc-shaped supporting plate after the scale cleaning mechanism is separated from a pipeline. The T-shaped sliding block can reach all pipelines of the water wall along the T-shaped groove.
The upper air pipe can be replaced by a hollow flexible shaft, so that the strength can be improved, and the included angle of the V-shaped rod is generally 70-90 degrees.
The working principle is as follows: when the water-cooled wall of boiler is cleared up to needs, the horizontal segment of water-cooled wall generally can be more than vertical section incrustation scale, generally can advance the pipeline of clearance horizontal segment. Before cleaning, stopping running the boiler, enabling a worker to enter the boiler body or the water collecting tank from an access hole of the boiler body or the water collecting tank, then placing the whole device into a pipeline of a water-cooled wall, when the boiler reaches a specified position, placing the device can be achieved through manual assistance, no longer repeatedly describing the connection between a horizontal section and a vertical section of the pipeline (generally), starting an air pump to inflate the air bag, jacking the top plate through the supporting plate after the air bag is full of gas, driving the circular cylinder to move upwards through the top plate, and driving the motor to drive the driving gear to rotate through the matching of the arc groove and the opening, wherein the driving gear drives the outer gear ring to rotate, the outer gear ring drives the circular cylinder to rotate along the cylindrical support, and the scraper extends the inner wall of the pipeline to clean scales on the inner wall of the pipeline. Because the pipeline is blocked after the large-diameter part of the air bag is inflated, enough scale is scraped and is blocked by the air bag, and cannot fall to the position below the air bag, and the cleaned scale can be prevented from falling to the vertical section of the water-cooled wall;
then through the pulling go up the trachea and move the device toward the export of pipeline gradually, at the in-process of pulling, the scraper lasts to clear up the inner wall of pipeline, and the incrustation scale after the gasbag will be scraped off simultaneously takes out.
In addition, when the gasbag was with the roof-board jack-up, the sealing washer was also by jack-up and breaks away from the bleeder vent, because the gasbag is provided with the check valve, most gas can pass through the bleeder vent blows to the inner wall of pipeline, further improves the clean effect.
When another pipeline of needs clearance, can place the device on the arc, promote the rack along track removal is avoided the manual work to hold the walking until another pipeline to the track is located the opening part of water-cooling wall, conveniently places the device in the pipeline of treating the clearance.
When the whole pipeline needs to be cleaned, the robot capable of walking in the pipeline can drive the device.
Compared with the prior art, the invention has the beneficial effects that: the pipeline cleaning device can assist in manually cleaning the pipeline of the water-cooled wall, and particularly aims at the horizontal pipe section with more scale; the scale is cleaned through the cooperation of a rotatable scraper and gas; the air bag can position the scraper and simultaneously can block the inner wall of the pipeline to block the removed scale; the effect of the whole heating system is realized through cleaning water scales on the water wall, and resources are saved.
Drawings
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic structural view of the placing rack;
FIG. 4 is a schematic view of the structure placed within a pipeline;
FIG. 5 is a schematic view of the scale cleaning mechanism;
FIG. 6 is a schematic view of the structure at a different angle from that of FIG. 5;
FIG. 7 is a schematic view of the internal structure of the bladder, the cylinder and the circular cylinder;
FIG. 8 is a schematic structural view of a circular column and its related parts;
FIG. 9 is a schematic view of the construction of the bladder and support plate;
FIG. 10 is a schematic view of a V-bar configuration;
wherein the reference numerals are: 1. a circular cylinder; 2. a cylinder body; 3. a cylindrical holder; 4. a V-shaped rod; 5. a scraper; 6. an air bag; 7. a support plate; 8. an airway; 9. fixing the rod; 10. a boiler body; 11. a water collection tank; 12. a seal ring; 101. an opening; 102. an arc-shaped slot; 103. an outer ring gear; 104. a top plate; 201. an ear plate; 202. a strip-shaped opening; 301. a driving gear; 302. a motor; 601. a large diameter part; 602. a small diameter part; 701. a spring; 801. a lower trachea; 802. a rotary joint; 803. air holes are formed; 901. a T-shaped groove; 902. placing a rack; 903. an arc-shaped supporting plate; 904. a T-shaped slider; 1001. a pipeline; 1201. a support rod.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment is as follows:
an energy-saving gas heating system comprises a boiler body 10, a water collecting tank 11 and a water-cooled wall, wherein the water-cooled wall comprises a plurality of pipelines 1001 communicated with the boiler body 10 and the water collecting tank 11, and is characterized in that rails are arranged on the inner wall of the boiler body 10 and the inner wall of the water collecting tank 11, a placing frame 902 is arranged in the rails in a sliding mode, and the rails are located on two sides of an opening 101 of the water-cooled wall;
the scale cleaning device further comprises a scale cleaning mechanism which can be placed on the placing rack 902 and used for cleaning the inner wall of the pipeline 1001.
The scale cleaning mechanism comprises a circular cylinder 1 and a cylinder 2 sleeved outside the circular cylinder 1, and ear plates 201 are symmetrically arranged outside the upper end of the cylinder 2;
the anti-leakage air bag type dust collector further comprises a V-shaped rod 4,V which end face is a curved face, the other end of the V-shaped rod 4,V is provided with a connecting part of a scraper 5,V type rod 4 and is rotatably arranged on an ear plate 201, two sides of a circular cylinder 1 are provided with openings 101 matched with one end of the V-shaped rod 4, the inner wall of the upper end of each opening 101 is provided with an arc-shaped groove 102 matched with the curved face, the middle position of the circular cylinder 1 is communicated with an air passage 8, the upper end of the air passage 8 is connected with an upper air pipe through a rotary joint 802, the upper air pipe is connected with an air pump, the lower end of the air passage 8 is connected with an air bag 6 through a lower air pipe 801, the air bag 6 comprises a large-diameter part 601 capable of blocking a pipeline 1001 and a small-diameter part 602 capable of extending into the cylinder 2, the lower end of the circular cylinder 1 is provided with a top plate 104 capable of contacting with the upper end of the small-diameter part 602, the lower air pipe 801 is arranged between the two top plates 104, and a one-way valve is arranged between the air bag 6 and the lower air pipe 801;
the air pump is inflated to gasbag 6 through last trachea, air flue 8, lower trachea 801 and check valve, and gasbag 6 inflates back major diameter portion 601 and can push up on the inner wall of pipeline 1001 and play the shutoff effect, and minor diameter portion 602 can push up roof 104, and roof 104 drives circular cylinder 1 and shifts up, and the cooperation of arc wall 102 and curved surface makes scraper 5 on the V type pole 4 outer end can push up on the inner wall of pipeline 1001. The cooperation of the arc-shaped slot 102 and the opening 101 forms a space for placing one end of the V-shaped rod 4, so that one end of the V-shaped rod 4 can not be separated from the arc-shaped slot 102 and the opening 101 in the process of moving and resetting the circular column 1.
Still including driving circular cylinder 1 pivoted actuating mechanism, actuating mechanism includes cartridge type support 3, and circular cylinder 1 rotates and sets up on cartridge type support 3, and the up end of circular cylinder 1 is concentric and fixed is provided with outer ring gear 103, rotates on cartridge type support 3 and is provided with driving gear 301 with outer ring gear 103 meshing, and driving gear 301 is through the motor 302 drive that has the reduction gear.
The upper end of the small diameter portion 602 is fixedly provided with a support plate 7, the support rod 1201 is fixedly connected with the support plate 7, and the side wall of the cylinder 2 is provided with a strip-shaped opening 202 allowing the support plate 7 to move up and down.
The V-shaped rod 4 is rotatably arranged on the V-shaped rod 4 through a shaft, and the axis of the shaft is spatially vertical to the axis of the cylinder 2.
The support plate 7 is disposed on the cylinder 2 by a spring 701.
The track is including two dead levers 9 that the symmetry set up, all runs through being provided with T type groove 901 on the dead lever 9, all slides in two T type grooves 901 and is provided with T type slider 904, and rack 902 is fixed on two T type sliders 904, is provided with on the rack 902 with barrel 2 complex arc layer board 903, barrel 2 can be placed on arc layer board 903 after incrustation scale clearance mechanism breaks away from pipeline 1001. The T-block 904 is able to reach all the pipes 1001 of the water wall along the T-channel 901.
The upper air pipe can be replaced by a hollow flexible shaft, so that the strength can be improved, and the included angle of the V-shaped rod 4 is generally 70-90 degrees.
The working principle is as follows: when the water-cooling wall to the boiler is cleared up to needs, the horizontal segment of water-cooling wall generally can be more than the vertical segment water scale, generally can advance the pipeline 1001 of clearance horizontal segment. Before the clearance, the operation-stopped boiler, the staff enters into boiler body 10 or the inside of header tank 11 from boiler body 10 or the access hole of header tank 11, then place whole device in the pipeline 1001 of water-cooling wall, when reacing the assigned position, the placing of device can be realized through artifical supplementary, no longer describe herein (generally reach the junction of pipeline 1001 horizontal segment and vertical section), start the air pump and inflate towards gasbag 6, after gasbag 6 is full of gas through backup pad 7 with roof 104 jack-up, roof 104 drives circular cylinder 1 and up moves, because the one end setting of V type groove is in opening 101 and arc groove 102, through the cooperation of arc groove 102 and opening 101 with the one end jack-up of V type pole 4, make V type pole 4 rotate, and then make the other end of V type pole 4 expand outward until scraper 5 pushes up on the inner wall of pipeline 1001 towards the inner wall of pipeline, then start motor 302, drive driving gear 301 rotates through motor 302, driving gear 301 drives outer ring gear 103 and rotates, outer ring gear 103 drives circular cylinder 1 and rotates along cylindrical support 3, then the scraper 1001 extends the pipeline 1001 and carries out the incrustation scale clearance to pipeline 1001. Because the pipeline 1001 is blocked after the large-diameter part 601 of the air bag 6 is inflated, enough scraped scale is blocked by the air bag 6 and cannot fall to the position below the air bag 6, and the cleaned scale can be prevented from falling to the vertical section of the water wall;
then move the device gradually to the export of pipeline 1001 through pulling the trachea of going up, at the in-process of pulling, scraper 5 continuously clears up the inner wall of pipeline 1001, and gasbag 6 can take out the incrustation scale after scraping simultaneously.
When another pipeline 1001 needs to be cleaned, the device can be placed on the arc-shaped plate, the placing frame 902 is pushed to move along the rail until the other pipeline 1001, the walking is avoided being held by a person, and the rail is located at the opening 101 of the water cooling wall, so that the device is conveniently placed in the pipeline 1001 to be cleaned.
Example two:
on the basis of the first embodiment, the lower air pipe 801 comprises a vertical section and a horizontal section, the lower end of the horizontal section is connected with the air bag 6, the lower end of the vertical section is provided with a plurality of air holes 803, the outer side of the vertical section is sleeved with a sealing ring 12 capable of plugging all the air holes 803, the lower end of the sealing ring 12 passes through the support rod 1201 and the small-diameter part 602, and the air holes 803 can blow air to the inner wall of the pipeline 1001.
When the air bag 6 pushes up the top plate 104, the sealing ring 12 is also pushed up and separated from the air vent 803, and most of the air can blow the inner wall of the pipeline 1001 through the air vent 803 due to the fact that the air bag 6 is provided with the one-way valve, and the cleaning effect is further improved.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, e.g. as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical features of the present invention, which are not described in the present application, can be implemented by or using the prior art, and are not described herein again, and of course, the above description is not limited to the above examples, and the present invention is not limited to the above examples, and variations, modifications, additions and substitutions which can be made by those skilled in the art within the spirit of the present invention should also fall within the scope of the present invention.
Claims (4)
1. An energy-saving gas heating system comprises a boiler body, a water collecting tank and a water-cooled wall, wherein the water-cooled wall comprises a plurality of pipelines communicated with the boiler body and the water collecting tank;
the scale cleaning mechanism can be placed on the placing rack and used for cleaning the inner wall of the pipeline;
the scale cleaning mechanism comprises a circular cylinder and a cylinder body sleeved on the outer side of the circular cylinder, and lug plates are symmetrically arranged on the outer side of the upper end of the cylinder body;
the air bag type air compressor is characterized by further comprising a V-shaped rod with a curved end face, a scraper is arranged at the other end of the V-shaped rod, the connecting part of the V-shaped rod is rotatably arranged on the lug plate, openings matched with one end of the V-shaped rod are formed in two sides of the circular cylinder, an arc-shaped groove matched with the curved surface is formed in the inner wall of the upper end of each opening, an air passage is formed in the middle of the circular cylinder, the upper end of the air passage is connected with an upper air pipe through a rotary joint, the upper air pipe is connected with an air pump, the lower end of the air passage is connected with an air bag through a lower air pipe, the air bag comprises a large-diameter part capable of plugging the pipeline and a small-diameter part capable of extending into the cylinder, a top plate capable of being in contact with the upper end of the small-diameter part is arranged at the lower end of the circular cylinder, the lower air pipe is located between the two top plates, and a one-way valve is arranged between the air bag and the lower air pipe;
the air pump is past through last trachea, air flue, trachea and check valve down the gasbag is aerifyd, the gasbag is aerifyd the back big diameter portion can push up on the inner wall of pipeline and play the shutoff effect, small diameter portion can with roof jack-up, the roof drives circular cylinder shifts up, the arc wall with the curved surface cooperation makes scraper in the V type pole outer end can push up on the inner wall of pipeline.
2. The energy-saving gas heating system according to claim 1, further comprising a driving mechanism for driving the circular cylinder to rotate, wherein the driving mechanism comprises a cylindrical support, the circular cylinder is rotatably disposed on the cylindrical support, an outer gear ring is concentrically and fixedly disposed on an upper end surface of the circular cylinder, a driving gear engaged with the outer gear ring is rotatably disposed on the cylindrical support, and the driving gear is driven by a motor with a speed reducer.
3. The energy-saving gas heating system according to claim 1, wherein the V-shaped rod is rotatably disposed on the V-shaped rod by a shaft, and an axis of the shaft is spatially perpendicular to an axis of the cylinder.
4. The energy-saving gas heating system according to claim 1, wherein the rail comprises two fixing rods symmetrically arranged, T-shaped grooves are formed in the fixing rods in a penetrating manner, T-shaped sliding blocks are arranged in the two T-shaped grooves in a sliding manner, the placing frame is fixed on the two T-shaped sliding blocks, an arc-shaped supporting plate matched with the barrel body is arranged on the placing frame, and the barrel body can be placed on the arc-shaped supporting plate after the scale removing mechanism is separated from the pipeline.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211341232.4A CN115717847A (en) | 2022-05-23 | 2022-05-23 | Gas heating system convenient for descaling |
| CN202210560359.9A CN114777556B (en) | 2022-05-23 | 2022-05-23 | Energy-saving gas heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560359.9A CN114777556B (en) | 2022-05-23 | 2022-05-23 | Energy-saving gas heating system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211341232.4A Division CN115717847A (en) | 2022-05-23 | 2022-05-23 | Gas heating system convenient for descaling |
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| Publication Number | Publication Date |
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| CN114777556A CN114777556A (en) | 2022-07-22 |
| CN114777556B true CN114777556B (en) | 2022-11-22 |
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| CN202210560359.9A Active CN114777556B (en) | 2022-05-23 | 2022-05-23 | Energy-saving gas heating system |
| CN202211341232.4A Pending CN115717847A (en) | 2022-05-23 | 2022-05-23 | Gas heating system convenient for descaling |
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| CN202211341232.4A Pending CN115717847A (en) | 2022-05-23 | 2022-05-23 | Gas heating system convenient for descaling |
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| KR100913412B1 (en) * | 2009-04-24 | 2009-09-16 | (주)성지토목기술공사 | Drainage canal |
| CN212329145U (en) * | 2020-03-09 | 2021-01-12 | 徐训庆 | Pipeline cleaning device for hydraulic engineering |
| CN112431919A (en) * | 2020-11-23 | 2021-03-02 | 温州潮步威机械科技有限公司 | Self-radiating speed reducer |
| CN113731974A (en) * | 2021-08-14 | 2021-12-03 | 新奥新能源工程技术有限公司 | Gas pipeline cleaning device and using method |
| CN215939257U (en) * | 2021-10-12 | 2022-03-04 | 湖南旻一生物科技有限公司 | Cleaning tool for water making machine |
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| Publication number | Publication date |
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| CN115717847A (en) | 2023-02-28 |
| CN114777556A (en) | 2022-07-22 |
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