Closed cooling tower external circulating water descaling device and descaling method

Abstract

The invention belongs to the technical field of cooling water treatment, and particularly relates to a descaling device and a descaling method for external circulating water of a closed cooling tower. The device comprises a tower body, a driving mechanism, an adjusting mechanism, a limiting mechanism and a pollution discharge mechanism, a sewage draining exit is formed in the center of the bottom of the tower body, and a sewage draining pipe is connected to the sewage draining exit; the upper end of the driving mechanism is fixedly connected to the outer top surface of the tower body, and the lower end of the driving mechanism extends into the tower body and is rotatably connected to a drain outlet in the bottom of the tower body; the adjusting mechanism is connected to the upper part of the driving mechanism; the limiting mechanism is connected between the inner top surface of the tower body and the adjusting mechanism; the pollution discharge mechanism is connected to a pollution discharge opening in the lower bottom surface of the tower body and sleeves the lower end of the driving mechanism. The cleaning effect is good, scraped dirt can be discharged from the blow-off pipe, the cooling tower does not need to be disassembled, and time and labor are saved. When the scraper moves to scrape dirt, the inner wall of the tower body is knocked, the cleaning effect is effectively improved, and finally the purpose of automatic descaling is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling water treatment, and in particular relates to a descaling device and a descaling method for external circulation water of a closed cooling tower. Background Art

[0002] The closed cooling tower places a tubular heat exchanger inside the tower, and ensures the cooling effect through the heat exchange of circulating air, spray water and circulating water. During the operation of the closed cooling tower, the spray liquid will quickly vaporize and evaporate after falling on the main body of the heat exchange tube, and the impurities and salts in the spray liquid will remain on the inner wall of the scaler, forming a layer of dirt after long-term accumulation. As the dirt gradually thickens, the heat exchange capacity of the cooling tower deteriorates, reducing the treatment effect of the cooling tower. Therefore, it is necessary to regularly clean the accumulated dirt in the cooling tower.

[0003] When cleaning the dirt on the inner wall of the scaler with existing cleaning equipment, the cooling tower needs to be disassembled for cleaning, which is not only time-consuming and labor-intensive, increasing the maintenance cost of the equipment, but also has the problem of incomplete dirt removal and poor cleaning effect. Summary of the invention

[0004] The present invention provides a closed cooling tower external circulation water descaling device and descaling method, the purpose of which is to provide a device that can solve the problem of scaling ions in the external circulation water being enriched due to evaporation and severe scaling, thereby reducing the cost of equipment production, operation and maintenance.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A descaling device for external circulation water of a closed cooling tower comprises a tower body, a driving mechanism, an adjusting mechanism, a limiting mechanism and a sewage discharge mechanism; a sewage discharge port is arranged at the bottom center position of the tower body, and a sewage discharge pipe is connected to the sewage discharge port; the upper end of the driving mechanism is fixedly connected to the outer top surface of the tower body, and the lower end of the driving mechanism extends into the tower body and is rotatably connected to the sewage discharge port at the bottom of the tower body; the adjusting mechanism is connected to the upper part of the driving mechanism; the limiting mechanism is connected between the inner top surface of the tower body and the adjusting mechanism; the sewage discharge mechanism is connected to the sewage discharge port on the lower bottom surface of the tower body and is sleeved on the lower end of the driving mechanism.

[0006] The driving mechanism comprises a motor; the motor is fixedly connected to the outer top surface of the tower body; the output end of the motor is connected to a screw rod, the screw rod is placed in the tower body, and the axis of the screw rod coincides with the axis of the tower body; a collar is threadedly connected to the upper part of the screw rod; the outer surface of the collar is movably connected to a shell; a regulating component is arranged between the shell and the collar; a circular ring is connected to the outer side wall of the shell through a plurality of evenly connected fixing rods, and the axis of the circular ring coincides with the axis of the screw rod; a plurality of mounting rods are evenly connected to the circular ring, and the plurality of mounting rods are perpendicular to the surface of the circular ring; the top of each mounting rod extends out of the upper surface of the circular ring, and is rotatably connected to an adjusting mechanism, the lower part of each mounting rod is connected to a scraper, and the scraper faces the inner wall of the tower body; the lower end of the screw rod is connected to a sewage pipe through a sewage discharge mechanism.

[0007] The regulating assembly includes a wedge block and a limit block; a plurality of grooves are provided inside the collar; the wedge block is slidably installed inside the groove; a tension spring is installed between the wedge block and the bottom surface of the groove, and the limit block is fixedly connected to the shell and cooperates with the limit block.

[0008] The limit block is a triangular prism structure; the wedge block is a cylinder, and its contact surface toward the inner wall of the tower body is an inclined surface.

[0009] The adjusting mechanism comprises a mounting block, a torsion spring, a rocker, a roller, a sleeve, a disc and a protrusion; the mounting block is fixedly connected to the upper part of the mounting rod in the driving mechanism; the torsion spring is sleeved on the mounting rod between the mounting block and the circular ring in the driving mechanism; a rocker is fixedly mounted on the mounting block, and the end of the rocker away from the mounting block is rotatably connected to the roller; the sleeve is threadedly connected to the outer surface of the screw in the driving mechanism, the lower end of the sleeve is rotatably connected to the outer shell in the driving mechanism, the outer surface of the sleeve is fixedly sleeved with a disc, the side wall of the disc is fixedly connected with a protrusion, the roller and the protrusion cooperate with each other, and the number of protrusions is less than the number of rollers; the disc is connected to a limiting mechanism.

[0010] The limiting mechanism comprises an articulated block and a rod; two articulated blocks are provided, and the two articulated blocks are respectively fixedly connected to the top surface of the tower body and the upper top surface of the adjustment mechanism; a plurality of rods articulated to each other end to end are connected between the two articulated blocks.

[0011] The sewage discharge mechanism includes a connecting cover, a cleaning pipe, a rotating shaft and a spiral plate; the upper end of the connecting cover is fixedly connected to the lower end of the screw in the driving mechanism, and the lower end of the connecting cover is rotatably connected to the sewage discharge pipe; the side wall of the connecting cover is provided with at least two through holes, each of which is fixedly connected with a horizontally arranged cleaning pipe, one side wall of each cleaning pipe is open, there is a gap between the bottom of the cleaning pipe and the bottom surface of the tower body, there is a gap between the outer end surface of the cleaning pipe and the inner wall of the tower body, a rotating shaft is rotatably plugged in the cleaning pipe, the outer surface of the rotating shaft located in the cleaning pipe is fixedly connected with a spiral plate, there is a gap between the outer edge of the spiral plate and the inner wall of the cleaning pipe, and the end of the rotating shaft located at one end of the connecting cover is connected with a rotation component for driving the rotating shaft to rotate.

[0012] The self-rotating assembly includes three bevel gears and a mounting frame; one of the bevel gears is horizontally arranged in the center, and the other two bevel gears are vertically meshed on both sides of the central bevel gear. The centrally arranged bevel gear is fixedly connected to the inner wall of the sewage pipe through the mounting frame.

[0013] The shape of the cleaning pipe is semi-cylindrical, and the bottom of the cleaning pipe is a plane parallel to the inner bottom surface of the tower body; the lateral openings of the two cleaning pipes are arranged in opposite directions.

[0014] A descaling method for a closed cooling tower external circulation water descaling device comprises the following steps: Step 1: Descaling the inner wall of the tower First, the driving mechanism is started, and the motor in the driving mechanism drives the screw to rotate in the forward direction. While the screw rotates, the sleeve in the adjustment mechanism threadedly connected to the screw moves downward along the screw under the action of the limit mechanism. At the same time, the sleeve drives the disc to move synchronously. While the disc moves up and down, several rods connected end to end will extend and contract synchronously according to the movement of the disc. When the sleeve moves up and down on the surface of the screw rod, it will drive the outer shell to move synchronously. When the outer shell moves synchronously, it will drive the sleeve ring of the internal movable connection to move synchronously. At this time, the sleeve ring will also rotate along the thread direction. When the sleeve ring rotates, it will drive the wedge block to rotate synchronously. At this time, the limit block on the outer shell will clamp the wedge block, and then the wedge block will drive the limit block to rotate synchronously. The synchronous rotation of the outer shell drives the circular ring connected by the fixed rod to rotate synchronously. The rotation of the circular ring drives the installation rod to rotate synchronously, and at the same time drives the scraper to rotate synchronously; when the scraper rotates, one side of it contacts the inner wall of the tower body to scrape off the dirt deposited on the inner wall; Step 2: Scraper self-cleaning and further cleaning of the tower body wall The rotation of the screw rod drives the mounting rod connected to the ring to rotate, and drives the rocker and the roller installed on the rocker to rotate synchronously. At this time, the roller rolls on the side wall of the disc. When encountering a bump on the side wall of the disc, part of the roller rolls along the surface of the bump to the inclined surface of the bump. At this time, the bump will push the corresponding roller and the rocker away from the disc, and then drive the corresponding mounting rod to rotate. The rotation of the mounting rod will drive the corresponding scraper below away from the inner wall of the cooling tower. When the roller is separated from the inclined surface of the bump, under the action of the torsion spring, the roller, the rocker and the mounting rod are quickly reset. At this time, the scraper is driven to move synchronously, and the quickly reset scraper knocks on the inner wall of the tower body, and the scraper is self-cleaning at the same time. Step 3: Clean the dirt at the bottom of the tower The dirt generated by step 1 and step 2 falls to the bottom of the cooling tower. As the screw rotates, the connecting cover is synchronously driven to rotate, and the rotation of the connecting cover drives the cleaning pipe to rotate. The rotation of the cleaning pipe collects the dirt that falls to the bottom in the cleaning pipe. The rotation of the cleaning pipe drives the internal rotating shaft to rotate synchronously. The synchronous rotation of the rotating shaft drives the bevel gear at the end of the rotating shaft to rotate, thereby driving the rotating shaft to rotate. The rotation of the rotating shaft drives the spiral plate to rotate, thereby driving the accumulated dirt to move to the sewage pipe, and finally discharged from the sewage pipe to complete the cleaning; Step 4: Reset the device After the cleaning is completed, the motor rotates in the reverse direction, driving the sleeve to move upward, and the collar reverses at the same time. At this time, the wedge block on the collar slides along the surface of the limit block, so that the sleeve is reset upward.

[0015] Beneficial effects: (1) The present invention introduces the external circulating water of the closed cooling tower into the treatment device, induces scaling inside the treatment device, and provides a plurality of scrapers arranged in an array. Driven by a driving mechanism, the scrapers rotate and slide up and down along the tower body to scrape off the dirt deposited on the inner wall of the tower body. This method has a good cleaning effect, and the scraped dirt can be discharged from the drain pipe without disassembling the cooling tower, saving time and effort.

[0016] (2) When the roller of the present invention rolls onto the bump, it drives the mounting rod to rotate. When the roller is detached from the bump, it quickly resets under the action of the torsion spring. At this time, the mounting rod drives the scraper to move synchronously. While scraping, the inner wall of the tower body can be knocked, which effectively improves the cleaning effect and ultimately achieves the purpose of automatic descaling.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional diagram of the internal overall structure of the descaling device of the present invention; Figure 2 is a cross-sectional view of the internal structure of the descaling device of the present invention; Figure 3 It is a top view of the internal structure of the descaling device of the present invention; Figure 4 It is a schematic diagram of the component structure of the descaling device in the present invention; Figure 5 It is a structural schematic diagram of the regulating component in the descaling device of the present invention; Figure 6 yes Figure 1 Schematic diagram of the structure at A in the middle; Figure 7 yes Figure 2 Schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. tower body; 2. scraper; 3. driving mechanism; 4. adjusting mechanism; 5. limiting mechanism; 6. sewage discharge mechanism; 101. Sewage pipe; 301, motor; 302, screw rod; 303, collar; 304, housing; 305, fixing rod; 306, ring; 307, mounting rod; 310, wedge block; 311, limit block; 312, tension spring; 401, mounting block; 402, torsion spring; 403, rocker; 404, roller; 405, sleeve; 406, disc; 407, bump; 501, hinge block; 502, rod; 601, connecting cover; 602, cleaning pipe; 603, rotating shaft; 604, spiral plate; 610, bevel gear; 611, mounting frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: according to Figure 1-Figure 7 A closed cooling tower external circulation water descaling device shown includes a tower body 1, a driving mechanism 3, an adjusting mechanism 4, a limiting mechanism 5 and a sewage discharge mechanism 6; a sewage discharge port is arranged at the bottom center of the tower body 1, and a sewage discharge pipe 101 is connected to the sewage discharge port; the upper end of the driving mechanism 3 is fixedly connected to the outer top surface of the tower body 1, and the lower end of the driving mechanism 3 extends into the tower body 1 and is rotatably connected to the sewage discharge port at the bottom of the tower body 1; the adjusting mechanism 4 is connected to the upper part of the driving mechanism 3; the limiting mechanism 5 is connected between the inner top surface of the tower body 1 and the adjusting mechanism 4; the sewage discharge mechanism 6 is connected to the sewage discharge port on the lower bottom surface of the tower body 1, and is sleeved on the lower end of the driving mechanism 3.

[0023] The present invention solves the problem of enrichment of scaling ions in the external circulating water due to evaporation through the organic coordination of the driving mechanism 3, the regulating mechanism 4, the limiting mechanism 5 and the sewage discharge mechanism 6, fundamentally solves the serious scaling problem of the circulating cooling water in the closed cooling tower, and reduces the production, operation and maintenance costs of the equipment.

[0024] Embodiment 2: according to Figure 2-Figure 6 The closed cooling tower external circulation water descaling device shown in the figure is different from the first embodiment in that: the driving mechanism 3 includes a motor 301; the motor 301 is fixedly connected to the outer top surface of the tower body 1; the output end of the motor 301 is connected to a screw rod 302, the screw rod 302 is placed in the tower body 1, and the axis of the screw rod 302 coincides with the axis of the tower body 1; the upper part of the screw rod 302 is threadedly connected to a collar 303; the outer surface of the collar 303 is movably connected to a shell 304; a regulating component is arranged between the shell 304 and the collar 303; the outer side of the shell 304 A circular ring 306 is connected to the wall through multiple fixed rods 305 that are evenly connected, and the axis of the circular ring 306 coincides with the axis of the screw rod 302; multiple mounting rods 307 are evenly connected to the circular ring 306, and the multiple mounting rods 307 are perpendicular to the surface of the circular ring 306; the top of each mounting rod 307 extends out of the upper surface of the circular ring 306, and is rotatably connected to an adjustment mechanism 4, and the lower part of each mounting rod 307 is connected to a scraper 2, and the scraper 2 faces the inner wall of the tower body 1; the lower end of the screw rod 302 is connected to the sewage pipe 101 through the sewage discharge mechanism 6.

[0025] Furthermore, the regulating component includes a wedge block 310 and a limit block 311; a plurality of grooves are provided inside the ring 303; the wedge block 310 is slidably installed inside the groove; a tension spring 312 is installed between the wedge block 310 and the bottom surface of the groove, and the limit block 311 is fixedly connected to the inner wall of the outer shell 304; the wedge block 310 cooperates with the limit block 311.

[0026] Furthermore, the limit block 311 is a triangular prism structure; the wedge block 310 is a cylinder, and its contact surface facing the inner wall of the tower body 1 is an inclined surface.

[0027] In actual use, the driving mechanism 3 is first started, and the motor 301 in the driving mechanism 3 drives the screw rod 302 to rotate forwardly. While the screw rod 302 rotates, the sleeve 405 in the adjusting mechanism 4 threadedly connected to the screw rod 302 moves downward along the screw rod 302 under the action of the limiting mechanism 5. At the same time, the sleeve 405 drives the disc 406 to move synchronously. While the disc 406 moves up and down, a number of rods 502 connected end to end will extend and contract synchronously according to the movement of the disc 406; while the sleeve 405 moves up and down on the surface of the screw rod 302, it will drive the housing 304 to move synchronously. While the housing 304 moves synchronously, it will also drive the internal movable connection ring 303 to move synchronously. The sleeve 303 also rotates along the thread direction. When the sleeve 303 rotates, the wedge block 310 is driven to rotate synchronously. At this time, the limit block 311 on the shell 304 will clamp the wedge block 310, and then the wedge block 310 will drive the limit block 311 to rotate synchronously. The synchronous rotation of the shell 304 drives the ring 306 connected by the fixing rod 305 to rotate synchronously. The rotation of the ring 306 drives the mounting rod 307 movably connected on the ring 306 to rotate synchronously. At the same time, the scraper 2 is also driven to rotate synchronously to scrape off the dirt deposited on the inner wall, so as to achieve the purpose of cleaning. In addition, the arrangement of multiple scrapers 2 can repeatedly clean some places, thereby improving the cleaning effect of the dirt on the inner wall of the scaler.

[0028] When the cleaning is completed, the motor 301 rotates in the opposite direction, thereby driving the sleeve 405 to move upward, and the ring 303 reverses at the same time. At this time, the wedge block 310 on the ring 303 will slide along the surface of the limit block 311, and will not get the limit block 311 stuck, and will not drive the housing 304 to rotate. Therefore, when the sleeve 405 is reset upward, it will not drive the scraper 2 to rotate, and the cleaning is completed.

[0029] Embodiment three: according to Figure 2-4 , Figure 6The closed cooling tower external circulation water descaling device shown in the figure is different from the first or second embodiment in that: the adjustment mechanism 4 includes a mounting block 401, a torsion spring 402, a rocker 403, a roller 404, a sleeve 405, a disc 406 and a protrusion 407; the mounting block 401 is fixedly connected to the upper part of the mounting rod 307 in the driving mechanism 3; the torsion spring 402 is sleeved on the mounting rod 307 between the mounting block 401 and the ring 306 in the driving mechanism 3; the mounting block 401 is fixedly mounted with a rocker 403, a roller 404, a sleeve 405, a disc 406 and a protrusion 407. 03, one end of the rocker 403 away from the mounting block 401 is rotatably connected to a roller 404; the sleeve 405 is threadedly connected to the outer surface of the screw 302 in the driving mechanism 3, and the lower end of the sleeve 405 is rotatably connected to the outer shell 304 in the driving mechanism 3, and a disk 406 is fixedly sleeved on the outer surface of the sleeve 405, and a protrusion 407 is fixedly connected to the side wall of the disk 406, and the roller 404 and the protrusion 407 cooperate with each other, and the number of the protrusions 407 is less than the number of the rollers 404; the disk 406 is connected to a limiting mechanism 5.

[0030] In actual use, when the mounting rod 307 rotates, the rocker 403 and the roller 404 mounted on the rocker 403 are driven to rotate synchronously. At this time, the roller 404 will roll on the side wall of the disc 406. When encountering the bump 407 on the side wall of the disc 406, part of the roller 404 will roll along the surface of the bump 407 and onto the inclined surface of the bump 407. At this time, the bump 407 will push the corresponding roller 404 and the rocker 403 away from the disc 406, and at this time, the corresponding mounting rod 307 will be driven to rotate. The rotation of the mounting rod 307 will drive the corresponding scraper 2 below Away from the inner wall of the cooling tower, when the roller 404 disengages from the inclined surface of the protrusion 407, under the action of the torsion spring 402, the roller 404, the rocker 403 and the mounting rod 307 are quickly reset, and at this time, the scraper 2 will be driven to move synchronously, and the quickly reset scraper 2 will knock on the inner wall of the scaler. At this time, firstly, the dirt on the inner wall that is not easy to scrape off can be knocked to loosen it or directly knock it off, thereby further improving the cleaning effect of the dirt inside the cooling tower; secondly, after the scraper 2 scrapes off the dirt, it may stick to the scraper 2. By knocking in this way, the scraper 2 can achieve a self-cleaning effect.

[0031] Embodiment 4: according to Figure 1 and Figure 2 The closed cooling tower external circulation water descaling device shown is different from the embodiment 1 in that: the limiting mechanism 5 includes a hinge block 501 and a rod 502; two hinge blocks 501 are provided, and the two hinge blocks 501 are respectively fixedly connected to the top surface of the tower body 1 and the upper top surface of the adjustment mechanism 4; a plurality of rods 502 are connected between the two hinge blocks 501 and are hinged to each other end to end.

[0032] In actual use, in order to achieve a better cleaning effect, the dirt can be first deposited on the inner wall of the tower body 1 by an electrochemical method, and then removed at one time.

[0033] During operation, the motor 301 is started first, and the motor 301 drives the screw rod 302 to rotate in the forward direction. While the screw rod 302 rotates, the sleeve 405 threadedly connected to the screw rod 302 moves downward on the screw rod 302 under the action of the limiting mechanism 5. At the same time, the sleeve 405 drives the disc 406 to move synchronously. While the disc 406 moves up and down, several rods 502 connected end to end will extend and contract synchronously according to the movement of the disc 406.

[0034] Embodiment five: according to Figure 1 and Figure 7 The closed cooling tower external circulation water descaling device shown in the figure is different from the first embodiment in that: the sewage discharge mechanism 6 includes a connecting cover 601, a cleaning pipe 602, a rotating shaft 603 and a spiral plate 604; the upper end of the connecting cover 601 is fixedly connected to the lower end of the screw rod 302 in the driving mechanism 3, and the lower end of the connecting cover 601 is rotatably connected to the sewage discharge pipe 101; the side wall of the connecting cover 601 is provided with at least two through holes, each of which is fixedly connected to a horizontally arranged cleaning pipe 602, and each cleaning pipe 604 is fixedly connected to the cleaning pipe 602. One side wall of 02 is open, there is a gap between the bottom of the cleaning tube 602 and the bottom surface of the tower body 1, there is a gap between the outer end surface of the cleaning tube 602 and the inner wall of the tower body 1, a rotating shaft 603 is rotatably inserted inside the cleaning tube 602, the rotating shaft 603 is located on the outer surface of the cleaning tube 602 and is fixedly connected with a spiral plate 604, there is a gap between the outer edge of the spiral plate 604 and the inner wall of the cleaning tube 602, and the end of the rotating shaft 603 located at one end of the connecting cover 601 is connected with a rotating component for driving the rotating shaft 603 to rotate.

[0035] Furthermore, the self-rotating assembly includes three bevel gears 610 and a mounting frame 611; one of the bevel gears 610 is horizontally arranged in the center, and the other two bevel gears 610 are relatively vertically meshed on both sides of the central bevel gear 610. The centrally arranged bevel gear 610 is fixedly connected to the inner wall of the sewage pipe 101 through the mounting frame 611.

[0036] Furthermore, the shape of the cleaning pipe 602 is semi-cylindrical, and the bottom of the cleaning pipe 602 is a plane parallel to the inner bottom surface of the tower body 1; the lateral openings of the two cleaning pipes 602 are arranged in opposite directions.

[0037] In actual use, the scraped dirt will fall to the bottom of the tower body 1. As the screw rod 302 rotates, the connecting cover 601 is synchronously driven to rotate. The rotation of the connecting cover 601 drives the cleaning tube 602 to rotate. The rotation of the cleaning tube 602 will gather the dirt that falls to the bottom in the cleaning tube 602. The rotation of the cleaning tube 602 will drive the internal rotating shaft 603 to rotate synchronously. The synchronous rotation of the rotating shaft 603 drives the bevel gear 610 at the end of the rotating shaft 603 to rotate. At this time, the meshing bevel gears 610 will drive the rotating shaft 603 to rotate. The rotation of the rotating shaft 603 will drive the spiral plate 604 installed on the rotating shaft 603 to rotate. The rotation of the spiral plate 604 drives the accumulated dirt to move to the sewage pipe 101, and finally it is discharged from the sewage pipe 101 to complete the cleaning.

[0038] The cleaning pipe 602 is semi-cylindrical in shape, and the bottom of the cleaning pipe 602 is a plane parallel to the inner bottom surface of the tower body 1; the lateral openings of the two cleaning pipes 602 are arranged in opposite directions, so that the effect of cleaning dirt is better.

[0039] Embodiment six: Reference Figure 1-Figure 7 A descaling method for a closed cooling tower external circulation water descaling device comprises the following steps: Step 1: Descaling the inner wall of tower body 1 First, the driving mechanism 3 is started, and the motor 301 in the driving mechanism 3 drives the screw rod 302 to rotate in the forward direction. When the screw rod 302 rotates, the sleeve 405 in the adjusting mechanism 4 threadedly connected to the screw rod 302 moves downward along the screw rod 302 under the action of the limiting mechanism 5. At the same time, the sleeve 405 drives the disc 406 to move synchronously. When the disc 406 moves up and down, a plurality of rods 502 connected end to end will extend and contract synchronously according to the movement of the disc 406. When the sleeve 405 moves up and down on the surface of the screw rod 302, it will drive the housing 304 to move synchronously. When the housing 304 moves synchronously, it will drive the internal movable ring 303 to move synchronously. At this time, the ring 303 will also rotate along the thread direction. When the ring 303 rotates, it will drive the wedge block 310 to rotate synchronously. At this time, the limit block 311 on the housing 304 will clamp the wedge block 310, and then the wedge block 310 will drive the limit block 311 to rotate synchronously. The synchronous rotation of the housing 304 drives the ring 306 connected by the fixing rod 305 to rotate synchronously. The rotation of the ring 306 drives the installation rod 307 to rotate synchronously, and at the same time drives the scraper 2 to rotate synchronously; when the scraper 2 rotates, one side of it contacts the inner wall of the tower body 1 to scrape off the dirt deposited on the inner wall; Step 2: Scraper 2 self-cleans and further cleans the inner wall of tower body 1 The rotation of the screw rod 302 drives the mounting rod 307 connected to the ring 306 to rotate, and drives the rocker 403 and the roller 404 installed on the rocker 403 to rotate synchronously. At this time, the roller 404 rolls on the side wall of the disk 406. When encountering the protrusion 407 on the side wall of the disk 406, part of the roller 404 rolls along the surface of the protrusion 407 to the inclined surface of the protrusion 407. At this time, the protrusion 407 will push the corresponding roller 404 and the rocker 403 to The top of the direction away from the disc 406 will drive the corresponding mounting rod 307 to rotate. The rotation of the mounting rod 307 will drive the corresponding scraper 2 below to move away from the inner wall of the cooling tower. When the roller 404 is separated from the inclined surface of the protrusion 407, the roller 404, the rocker 403 and the mounting rod 307 are quickly reset under the action of the torsion spring 402. At this time, the scraper 2 will be driven to move synchronously. The quickly reset scraper 2 will knock on the inner wall of the tower body 1, and the scraper 2 will clean itself at the same time. Step 3: Cleaning the dirt at the bottom of the tower body 1 The dirt generated by step 1 and step 2 falls to the bottom of the cooling tower. As the screw 302 rotates, the connecting cover 601 is synchronously driven to rotate. The rotation of the connecting cover 601 drives the cleaning pipe 602 to rotate. The cleaning pipe 602 rotates to collect the dirt that falls to the bottom in the cleaning pipe 602. The rotation of the cleaning pipe 602 drives the internal rotating shaft 603 to rotate synchronously. The synchronous rotation of the rotating shaft 603 drives the bevel gear 610 at the end of the rotating shaft 603 to rotate, thereby driving the rotating shaft 603 to rotate. The rotation of the rotating shaft 603 drives the spiral plate 604 to rotate, thereby driving the accumulated dirt to move to the sewage pipe 101, and finally discharged from the sewage pipe 101 to complete the cleaning. Step 4: Reset the device After cleaning is completed, the motor 301 rotates in the reverse direction, driving the sleeve 405 to move upward, and the collar 303 reverses at the same time. At this time, the wedge block 310 on the collar 303 slides along the surface of the limit block 311, so that the sleeve 405 is reset upward.

[0040] The present invention introduces external circulating water of a closed cooling tower into a treatment device, induces scaling inside the treatment device, and provides a plurality of scrapers arranged in an array. Driven by a driving mechanism, the scrapers rotate and slide up and down along the tower body to scrape off the scale deposited on the inner wall of the scaler. This method has a good cleaning effect, and the scraped scale can be discharged from a drain pipe without disassembling the cooling tower, thus saving time and effort.

[0041] The present invention provides a regulating component. When the collar moves downward, the limit block will clamp the wedge block, thereby driving the shell to rotate synchronously. When the collar moves upward, the wedge block will slide on the surface of the limit block and will not drive the shell to rotate.

[0042] When the roller rolls onto the bump, it will drive the mounting rod to rotate. When the roller leaves the bump, it will quickly reset under the action of the torsion spring. The mounting rod will then drive the scraper to move synchronously. While scraping, it can knock on the inner wall of the scaler to improve the cleaning effect and ultimately achieve the purpose of automatic scale removal.

[0043] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0046] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A closed cooling tower external circulation water descaling device, characterized in that: The tower body (1) comprises a tower body (1), a driving mechanism (3), an adjusting mechanism (4), a limiting mechanism (5) and a sewage discharge mechanism (6); a sewage discharge outlet is arranged at the center of the bottom of the tower body (1), and a sewage discharge pipe (101) is connected to the sewage discharge outlet; the upper end of the driving mechanism (3) is fixedly connected to the outer top surface of the tower body (1), and the lower end of the driving mechanism (3) extends into the tower body (1) and is rotatably connected to the sewage discharge outlet at the bottom of the tower body (1); the adjusting mechanism (4) is connected to the upper part of the driving mechanism (3); the limiting mechanism (5) is connected between the inner top surface of the tower body (1) and the adjusting mechanism (4); the sewage discharge mechanism (6) is connected to the sewage discharge outlet on the lower bottom surface of the tower body (1) and is sleeved on the lower end of the driving mechanism (3).

2. A closed cooling tower external circulation water descaling device as claimed in claim 1, characterized in that: The driving mechanism (3) comprises a motor (301); the motor (301) is fixedly connected to the outer top surface of the tower body (1); the output end of the motor (301) is connected to a screw rod (302), the screw rod (302) is placed in the tower body (1), and the axis of the screw rod (302) coincides with the axis of the tower body (1); a collar (303) is threadedly connected to the upper part of the screw rod (302); the outer surface of the collar (303) is movably connected to a housing (304); a regulating component is arranged between the housing (304) and the collar (303); a plurality of evenly connected fixing rods (304) are arranged on the outer wall of the housing (304); 5) is connected to a circular ring (306), the axis of the circular ring (306) coincides with the axis of the screw rod (302); a plurality of mounting rods (307) are evenly connected to the circular ring (306), and the plurality of mounting rods (307) are perpendicular to the surface of the circular ring (306); the top of each mounting rod (307) extends out of the upper surface of the circular ring (306) and is rotatably connected to an adjustment mechanism (4); the lower part of each mounting rod (307) is connected to a scraper (2), and the scraper (2) faces the inner wall of the tower body (1); the lower end of the screw rod (302) is connected to a sewage discharge pipe (101) via a sewage discharge mechanism (6).

3. A closed cooling tower external circulation water descaling device as claimed in claim 2, characterized in that: The regulating assembly comprises a wedge block (310) and a limit block (311); a plurality of grooves are provided inside the collar (303); the wedge block (310) is slidably installed inside the groove; a tension spring (312) is installed between the wedge block (310) and the bottom surface of the groove; the limit block (311) is fixedly connected to the inner wall of the housing (304); the wedge block (310) and the limit block (311) cooperate with each other.

4. A closed cooling tower external circulation water descaling device as claimed in claim 3, characterized in that: The limit block (311) is a triangular prism structure; the wedge block (310) is a cylinder, and its contact surface facing the inner wall of the tower body (1) is an inclined surface.

5. A closed cooling tower external circulation water descaling device as claimed in claim 1 or 2, characterized in that: The adjusting mechanism (4) comprises a mounting block (401), a torsion spring (402), a rocker (403), a roller (404), a sleeve (405), a disc (406) and a protrusion (407); the mounting block (401) is fixedly connected to the upper part of a mounting rod (307) in the driving mechanism (3); the torsion spring (402) is sleeved on the mounting rod (307) between the mounting block (401) and the circular ring (306) in the driving mechanism (3); a rocker (403) is fixedly mounted on the mounting block (401), and the rocker (403) is away from the mounting block (401). ) is rotatably connected to one end of a roller (404); the sleeve (405) is threadedly connected to the outer surface of a screw rod (302) in the driving mechanism (3); the lower end of the sleeve (405) is rotatably connected to a housing (304) in the driving mechanism (3); a disk (406) is fixedly sleeved on the outer surface of the sleeve (405); a protrusion (407) is fixedly connected to the side wall of the disk (406); the roller (404) and the protrusion (407) cooperate with each other; the number of the protrusions (407) is less than the number of the rollers (404); and a limiting mechanism (5) is connected to the disk (406).

6. A closed cooling tower external circulation water descaling device as claimed in claim 1, characterized in that: The limiting mechanism (5) comprises an articulated block (501) and a rod (502); two articulated blocks (501) are provided, and the two articulated blocks (501) are respectively fixedly connected to the top surface of the tower body (1) and the upper top surface of the adjustment mechanism (4); and a plurality of rods (502) are connected between the two articulated blocks (501) and are hinged to each other end to end.

7. A closed cooling tower external circulation water descaling device as claimed in claim 1, characterized in that: The sewage discharge mechanism (6) comprises a connecting cover (601), a cleaning pipe (602), a rotating shaft (603) and a spiral plate (604); the upper end of the connecting cover (601) is fixedly connected to the lower end of the screw rod (302) in the driving mechanism (3), and the lower end of the connecting cover (601) is rotatably connected to the sewage discharge pipe (101); at least two through holes are formed in the side wall of the connecting cover (601), and a horizontally arranged cleaning pipe (602) is fixedly connected in each through hole; one side wall of each cleaning pipe (602) is open, and the cleaning pipe (602) is There is a gap between the bottom of the cleaning tube (602) and the bottom surface of the tower body (1), there is a gap between the outer end surface of the cleaning tube (602) and the inner wall of the tower body (1), a rotating shaft (603) is rotatably inserted inside the cleaning tube (602), a spiral plate (604) is fixedly connected to the outer surface of the rotating shaft (603) located inside the cleaning tube (602), there is a gap between the outer edge of the spiral plate (604) and the inner wall of the cleaning tube (602), and a self-rotating component for driving the rotating shaft (603) to rotate is connected to the end of the rotating shaft (603) located at one end of the connecting cover (601).

8. A closed cooling tower external circulation water descaling device as claimed in claim 7, characterized in that: The self-rotating assembly comprises three bevel gears (610) and a mounting frame (611); one of the bevel gears (610) is horizontally arranged in the center, and the other two bevel gears (610) are vertically meshed on both sides of the bevel gear (610) in a relatively opposite manner; the bevel gear (610) arranged in the center is fixedly connected to the inner wall of the sewage pipe (101) via the mounting frame (611).

9. A closed cooling tower external circulation water descaling device as claimed in claim 7, characterized in that: The cleaning pipe (602) is in the shape of a semi-cylinder, and the bottom of the cleaning pipe (602) is a plane parallel to the inner bottom surface of the tower body (1); the lateral openings of the two cleaning pipes (602) are arranged in opposite directions.

10. A descaling method for a closed cooling tower external circulation water descaling device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Descaling the inner wall of the tower body (1) First, the driving mechanism (3) is started, and the motor (301) in the driving mechanism (3) drives the screw rod (302) to rotate in the forward direction. While the screw rod (302) rotates, the sleeve (405) in the adjustment mechanism (4) threadedly connected to the screw rod (302) moves downward along the screw rod (302) under the action of the limiting mechanism (5). At the same time, the sleeve (405) drives the disc (406) to move synchronously. While the disc (406) moves up and down, a plurality of rods (502) connected end to end will extend and contract synchronously according to the movement of the disc (406); When the sleeve (405) moves up and down on the surface of the screw rod (302), it drives the housing (304) to move synchronously. When the housing (304) moves synchronously, it drives the internal movably connected collar (303) to move synchronously. At this time, the collar (303) will also rotate along the thread direction. When the collar (303) rotates, it drives the wedge block (310) to rotate synchronously. At this time, the limit block (311) on the housing (304) will clamp the wedge block (310), and then the wedge block (310) will drive the limit block (311) to rotate synchronously. The housing (304) rotates synchronously and drives the circular ring (306) connected by the fixing rod (305) to rotate synchronously. The rotation of the circular ring (306) drives the installation rod (307) to rotate synchronously, and drives the scraper (2) to rotate synchronously. When the scraper (2) rotates, one side of it contacts the inner wall of the tower body (1) to scrape off the dirt deposited on the inner wall. Step 2: The scraper (2) cleans itself and further cleans the inner wall of the tower body (1) The rotation of the screw rod (302) drives the mounting rod (307) connected to the ring (306) to rotate, and drives the rocker (403) and the roller (404) mounted on the rocker (403) to rotate synchronously. At this time, the roller (404) rolls on the side wall of the disk (406). When encountering the protrusion (407) on the side wall of the disk (406), part of the roller (404) rolls along the surface of the protrusion (407) to the inclined surface of the protrusion (407). At this time, the protrusion (407) will cause the corresponding roller (404) and the rocker (403) to rotate synchronously. ) is pushed in a direction away from the disc (406), at which time the corresponding mounting rod (307) is driven to rotate, and the rotation of the mounting rod (307) drives the corresponding scraper (2) below away from the inner wall of the cooling tower. When the roller (404) is separated from the inclined surface of the protrusion (407), under the action of the torsion spring (402), the roller (404), the rocker (403) and the mounting rod (307) are quickly reset, at which time the scraper (2) is driven to move synchronously, and the quickly reset scraper (2) knocks against the inner wall of the tower body (1), while the scraper (2) is self-cleaning; Step 3: Clean the dirt at the bottom of the tower body (1) The dirt generated by step 1 and step 2 falls to the bottom of the cooling tower. As the screw (302) rotates, the connecting cover (601) is synchronously driven to rotate. The rotation of the connecting cover (601) drives the cleaning pipe (602) to rotate. The rotation of the cleaning pipe (602) collects the dirt that falls to the bottom in the cleaning pipe (602). The rotation of the cleaning pipe (602) drives the internal rotating shaft (603) to rotate synchronously. The synchronous rotation of the rotating shaft (603) drives the bevel gear (610) at the end of the rotating shaft (603) to rotate, thereby driving the rotating shaft (603) to rotate. The rotating shaft (603) rotates to drive the spiral plate (604) to rotate, thereby driving the accumulated dirt to move toward the sewage pipe (101). Finally, the dirt is discharged from the sewage pipe (101), and the cleaning is completed. Step 4: Reset the device After the cleaning is completed, the motor (301) rotates in the reverse direction, driving the sleeve (405) to move upward, and the collar (303) rotates in the reverse direction. At this time, the wedge block (310) on the collar (303) slides along the surface of the limit block (311), thereby resetting the sleeve (405) upward.

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