Chemical descaling injector for heat distribution pipeline

Abstract

The invention discloses a heat distribution pipeline chemical descaling injector which comprises a liquid pump, the output end of the liquid pump is connected with a conveying pipe, a first flange plate is arranged at the end of the conveying pipe in a communicating mode, and the first flange plate is detachably installed on a heat distribution pipeline; the device further comprises a flexible shaft, the flexible shaft extends into the heat distribution pipeline, the end of the flexible shaft is connected with the flange plate, and a plurality of sets of cleaning mechanisms are arranged on the flexible shaft at intervals and located in the heat distribution pipeline. The device further comprises a motor. The cleaning device is provided with the flexible shaft and the multiple sets of cleaning mechanisms, the multiple sets of cleaning mechanisms sleeve the flexible shaft at intervals, and meanwhile, the flexible shaft and the cleaning mechanisms are arranged in the heat distribution pipeline, so that after the heat distribution pipeline is filled with a descaling agent, the flexible shaft is controlled to rotate, and then the multiple sets of cleaning mechanisms are driven to rotate; the scale remover is stirred to make full contact with scale in the heat distribution pipeline, the scale on the heat distribution pipeline is scraped away, cleaning of the scale is accelerated, and the scale removing time is shortened.

Description

Technical Field

[0001] The present invention relates to the field of descaling equipment, and particularly to a chemical descaling injector for thermal pipelines. Background Art

[0002] The main function of a thermal pipeline is to transfer heat, while water scale is a poor conductor of heat. For example, the thermal conductivity of a steel pipe is generally about 45 - 60 W / (m·K), while the thermal conductivity of calcium carbonate water scale is about 0.5 - 2.5 W / (m·K). When water scale deposits on the inner wall of the pipeline, it will greatly increase the thermal resistance. Over time, the water scale will continue to accumulate. In some areas with relatively hard water quality, the concentrations of calcium, magnesium and other ions in the water are relatively high, and a large amount of water scale is easily formed. If not cleaned in time, the water scale will gradually reduce the effective inner diameter of the pipeline.

[0003] This means that more energy needs to be consumed to achieve the same heating or steam supply effect. For example, in an industrial steam transmission system, if the inner wall of the pipeline is severely scaled, in order to ensure the temperature and pressure of the steam, the boiler needs to burn more fuel, thus increasing the operating cost.

[0004] The presence of water scale will create conditions for pipeline corrosion. On the one hand, it is easy to form a locally oxygen-deficient environment on the metal surface under the water scale. For example, in the gaps under the scale, the dissolved oxygen in the water is difficult to reach, forming an oxygen concentration difference cell, which causes the pipeline metal to be corroded as the anode. On the other hand, the water scale may contain corrosive ions, such as chlorides, etc. These ions will accelerate the corrosion of the pipeline under certain conditions.

[0005] At present, the common method for removing the water scale adhering to the inner side wall of a thermal pipeline is to inject a descaling agent into the pipeline. First, the thermal pipeline system needs to be isolated from other equipment, relevant valves are closed, and the medium in the pipeline is emptied. Then, according to the volume of the pipeline and the situation of the water scale, the required amount of acid solution and inhibitor is calculated. After mixing the acid solution and the inhibitor evenly in a certain proportion, they are injected into the thermal pipeline through a special injection device. During the injection process, it is necessary to ensure that the descaling agent can be evenly distributed in the pipeline, which can be achieved by adjusting the injection pressure and flow rate. After soaking, the acid solution is discharged, and then the pipeline is repeatedly rinsed with clean water until the pH value of the discharged water reaches neutral to remove the residual acid solution and the dissolved water scale products.

[0006] In order to completely remove the water scale, the acid solution needs to stay in the pipeline for a period of time, which depends on the thickness and nature of the water scale, generally ranging from several hours to more than ten hours. For example, for thinner water scale, the residence time may be 3 - 5 hours; for thicker water scale, it may take 8 - 12 hours.

[0007] If the heat pipeline suspends heating due to scale removal, it will cause the indoor temperature of residents to drop, affecting the comfort of residents. Even the suspension of heating will affect industrial production, such as industries like chemical engineering, pharmaceuticals, and food processing. The suspension of heating in the thermal pipeline will lead to the interruption of the production process. For some factories with continuous production, such an interruption may cause huge economic losses. For example, in chemical production, certain chemical reactions need to be carried out at specific temperatures. The suspension of heating will make the reaction unable to proceed normally, resulting in the backlog of semi-finished products and the extension of the production cycle. Summary of the Invention

[0008] The purpose of the present invention is to provide a chemical descaling injector for thermal pipelines, aiming to improve the problem that the chemical descaling of thermal pipelines takes a long time and affects production and life.

[0009] The present invention is implemented as follows: A chemical descaling injector for thermal pipelines includes a liquid pump. The output end of the liquid pump is connected to a delivery pipe. A first flange is communicatively arranged at the end of the delivery pipe, and the first flange is detachably installed on the thermal pipeline. It also includes a flexible shaft that extends into the thermal pipeline and its end is connected to the flange. Multiple sets of cleaning mechanisms are arranged at intervals on the flexible shaft, and the cleaning mechanisms are located in the thermal pipeline. Additionally, it includes a motor that can be connected to the rotating shaft of the flexible shaft or the liquid pump.

[0010] Preferably, the cleaning mechanism includes a sleeve, two connecting plates, and two friction discs. The two connecting plates are symmetrically and hingedly arranged on the side of the sleeve, and the two friction discs are respectively arranged at the ends of the two connecting plates away from the sleeve.

[0011] Preferably, a fixing plate is fixedly arranged at the end of the sleeve, and a snap groove is arranged on the end face. A clamping plate is connected by bolts on the side of the fixing plate. A snap column is fixedly arranged at the end of the clamping plate, and the snap column is located in the snap groove. The central angle of the snap groove is greater than 180°, and the end is set as an opening.

[0012] Preferably, the flexible shaft penetrates through the sleeve and passes through the space formed by the fixing plate and the clamping plate. Adjacent sets of cleaning mechanisms are in a mutually perpendicular state.

[0013] Preferably, a transmission shaft penetrates through the middle of the flange. A fixing disc is detachably arranged at the end of the transmission shaft. A pressing plate is connected by bolts on the side of the fixing disc. Grooves are arranged on the edges of the two pressing plates close to each other. A end disc is fixedly arranged at the end of the flexible shaft, and the end disc is arranged in the space formed by the pressing plate and the fixing disc.

[0014] Preferably, a polygonal shaft and a bent pipe are provided on one side of the fixed disk away from the extrusion plate, and the polygonal shaft is inserted into the transmission shaft; a clamping arc plate is arranged on the outer side of the transmission shaft, and a first spiral groove and a second spiral groove are respectively arranged on the side walls of the transmission shaft and the clamping arc plate. The bent pipe is located in the space formed by the first spiral groove and the second spiral groove; the end of the transmission shaft is connected to the motor through a coupling.

[0015] Preferably, a driving shaft is fixedly arranged on the side of the fixed disk. The driving shaft is arranged in a polygonal structure, and a polygonal hole is arranged on the transmission shaft. The driving shaft passes through the polygonal hole; a shaft body is connected and inserted through a bearing on the flange. Gears that mesh with each other are arranged on the transmission shaft and the shaft body respectively; the end of the shaft body is connected to the motor through a coupling.

[0016] Preferably, a handle is arranged on the side of the flange, a plug slot is arranged on the handle, an end post is fixedly arranged at the end of the driving shaft, and the end post is inserted into the plug slot through a bearing connection.

[0017] Preferably, a support plate is arranged below the motor, a plurality of universal wheels are arranged below the support plate, and a push plate is arranged at the end of the support plate; a threaded rod penetrates through the end of the support plate, and a bottom plate is arranged at the bottom of the threaded rod.

[0018] Preferably, the connecting plate includes a first plate body and a second plate body. The first plate body is arranged in a U-shaped structure, and a clamping groove is arranged on the inner side wall. The end of the second plate body is inserted into the first plate body, and a clamping plate fixedly installed on the second plate body is located in the clamping groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The present invention is provided with a flexible shaft and multiple sets of cleaning mechanisms, and the multiple sets of cleaning mechanisms are arranged at intervals on the flexible shaft. At the same time, the flexible shaft and the cleaning mechanisms are both arranged in the heat pipeline. Therefore, after adding scale remover to the heat pipeline, the rotation of the flexible shaft can be controlled, thereby driving the multiple sets of cleaning mechanisms to rotate, stirring the scale remover to make it fully contact with the scale in the heat pipeline, and scraping the scale on the heat pipeline, accelerating the cleaning of the scale and reducing the descaling time.

[0021] 2. The present invention is provided with a motor that can be easily moved, which facilitates the staff to move the support plate according to needs, thereby adjusting the position of the motor, providing convenience for connecting the motor to a liquid pump or a flexible shaft, and reducing the cost of the device.

[0022] 3. The present invention is provided with a driving shaft at the end of the flexible shaft, and the driving shaft passes through the transmission shaft. At the same time, it can move relative to the transmission shaft under the pull of an external force. Therefore, the position of multiple sets of cleaning mechanisms can be adjusted by controlling the movement of the driving shaft, providing support for more comprehensive and rapid scale cleaning. Description of the Drawings

[0023] Figure 1 is the first structural schematic diagram of the whole invention;

[0024] Figure 2 is the structural schematic diagram of the conveying pipe and the motor of the present invention;

[0025] Figure 3 is the first structural schematic diagram of the cleaning mechanism and the flexible shaft of the present invention;

[0026] Figure 4 is the structural schematic diagram of the connecting mechanism of the present invention;

[0027] Figure 5 is the second structural schematic diagram of the cleaning mechanism and the flexible shaft of the present invention;

[0028] Figure 6 is the structural schematic diagram of the cleaning mechanism of the present invention;

[0029] Figure 7 is the structural schematic diagram of the push plate of the present invention;

[0030] Figure 8 is the second structural schematic diagram of the whole invention;

[0031] Figure 9 is the structural schematic diagram of the second flange, the driving shaft and the grip of the present invention;

[0032] Figure 10 is the structural schematic diagram of the driving shaft and the flexible shaft of the present invention;

[0033] Figure 11 is the structural schematic diagram of the driving shaft and the grip of the present invention;

[0034] Figure 12 is the structural schematic diagram of the first shaft body and the second shaft body of the present invention.

[0035] Figure 13 is the schematic diagram of the cleaning mechanism of the present invention.

[0036] In the figure: 1. Delivery pipe; 11. Control valve; 12. Pressure gauge; 2. Liquid pump; 3. Motor; 31. Pusher plate; 32. Universal wheel; 33. Threaded rod; 34. Bottom plate; 35. Support plate; 4. Connecting mechanism; 41. First flange; 42. First spiral groove; 43. Transmission shaft; 44. Clamping arc plate; 45. Second spiral groove; 46. Polygonal shaft; 47. Bending pipe; 48. Fixed disk; 49. Extrusion plate; 491. Groove; 5. Cleaning mechanism; 51. Connecting plate; 511. First plate body; 512. Card slot; 513. Card plate; 514. Second plate body; 52. Sleeve; 53. Snap groove; 54. Snap post; 55. Clamping plate; 56. Fixed plate; 57. Friction disk; 6. Flexible shaft; 61. End disk; 7. Second flange; 71. Shaft body; 73. Polygonal hole; 74. Gear; 8. Driving shaft; 81. End post; 9. Handle; 91. Insertion slot. Detailed implementation manners

[0037] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] The following will be further described in conjunction with the accompanying drawings and specific embodiments:

[0039] Embodiment 1

[0040] In order to reduce the descaling time of the thermal pipeline and reduce the impact on production and life, this embodiment provides a new device for descaling the thermal pipeline. When using this device to descale the thermal pipeline, under the action of this device, the descaling agent can be injected into the thermal pipeline, and the descaling agent can be retained in the thermal pipeline. Then, the device can work to stir the descaling agent to make it fully contact with the scale in the thermal pipeline, and scrape the scale on the thermal pipeline, accelerating the cleaning of the scale and reducing its descaling time.

[0041] Such as Figure 1 Or Figure 8As shown in the figure, in order to achieve the descaling treatment of the heat pipeline, the device includes a liquid pump 2, a motor 3, and a delivery pipe 1. The power output shaft of the motor 3 is connected to the rotating shaft of the liquid pump 2 through a coupling. The liquid inlet end of the liquid pump 2 is connected to the descaling agent source through a pipeline. At the same time, the delivery pipe 1 is installed at the output end of the liquid pump 2 in a communicating manner. Therefore, the operation of the liquid pump 2 can be controlled under the operation of the motor, and then the descaling agent can be pumped to flow into the delivery pipe 1. A first flange 41 is provided at one end of the delivery pipe 1 away from the liquid pump 2, and the first flange 41 can be installed at the end of the heat pipeline through bolt connection. Therefore, the descaling agent can flow into the heat pipeline through the delivery pipe 1, and the water scale can be softened under the action of the descaling agent. A control valve 11, a pressure gauge 12, etc. are provided between the delivery pipe 1 and the first flange 41.

[0042] As Figure 1 , Figure 3 , Figure 5 shown in the figure, in order to accelerate the removal efficiency of the water scale, the device further includes a flexible shaft 6, multiple sets of cleaning mechanisms 5, etc. Before injecting the descaling agent, the flexible shaft 6 is inserted into the heat pipeline, and the end is connected to the first flange 41 or other flanges, so as to control the rotation of the flexible shaft 6 under the action of the motor 3. At the same time, multiple sets of cleaning mechanisms 5 are sleeved on the flexible shaft 6 at intervals. Therefore, they can rotate synchronously with the flexible shaft 6. During the rotation of the cleaning mechanism 5, the end scrapes the softened water scale, so that the descaling agent contacts the unsoftened water scale in the deeper layer, and then the rapid removal of the water scale is realized.

[0043] As Figure 6 shown in the figure, in order to be able to install the cleaning mechanism 5 in the heat pipeline, it is set to an adjustable state, that is, its own size can be adjusted according to requirements. Specifically, the cleaning mechanism 5 includes a sleeve 52, two connecting plates 51, and two friction discs 57. The two connecting plates 51 are symmetrically and hinged on the side of the sleeve 52 through a central shaft, bearings, etc. The two friction discs 57 are respectively arranged at one end of the two connecting plates 51 away from the sleeve 52. Since the connecting plates 51 are movably arranged outside the sleeve 52, the position of the connecting plates 51 can be adjusted according to requirements to make them close to or far away from the sleeve 52. When the connecting plates 51 are close to the sleeve 52, the size of the cleaning mechanism 5 is reduced, which facilitates the insertion of the cleaning mechanism 5 into the heat pipeline. When the connecting plates 51 are far away from the sleeve 52, they can contact the water scale, and the water scale can be removed under the impact of the friction discs 57.

[0044] As Figure 4As shown in the figure, in order to control the rotation of the flexible shaft 6, a transmission shaft 43 is penetrated through the middle of the first flange 41 or other flanges. The transmission shaft 43 can be connected to the power output shaft of the motor 3 through a coupling. Therefore, under the action of the motor 3, the rotation of the transmission shaft 43 can be controlled. A fixed disk 48 is arranged at the end of the transmission shaft 43, and the end of the flexible shaft 6 is connected to the fixed disk 48. Therefore, after adding a descaling agent into the heat pipeline, the position of the motor 3 can be adjusted to connect the motor 3 with the transmission shaft 43, thereby driving the flexible shaft 6 to rotate, and controlling the rotation of multiple sets of cleaning mechanisms 5 under the action of the flexible shaft 6 to achieve the removal of scale on the side wall of the heat pipeline. In order to avoid the leakage of the descaling agent, components such as a stationary ring, a rotating ring, an elastic element (such as a spring), and an auxiliary sealing ring are arranged at the junction of the transmission shaft 43 and the flange. The stationary ring is fixed on the flange, and the rotating ring is tightly connected to the transmission shaft 43 and rotates with the shaft to achieve the mechanical seal between the transmission shaft 43 and the flange. When the motor operates, under the action of the spring force and the medium pressure, the end faces of the rotating ring and the stationary ring are closely attached to form a sealing surface. This sealing surface can effectively prevent liquid from entering the interior of the motor. This sealing method has been used on the motor housing and the motor central shaft.

[0045] As Figure 4 shown in the figure, in order to stably install the fixed disk 48 on the transmission shaft 43, a polygonal shaft 46 and a bent pipe 47 are arranged on the side of the fixed disk 48 away from the pressing plate 49. Two clamping arc plates 44 are arranged on the outer side of the transmission shaft 43. The two clamping arc plates 44 are connected by bolts. First spiral grooves 42 and second spiral grooves 45 are respectively arranged on the side walls of the transmission shaft 43 and the clamping arc plates 44. The bent pipe 47 is located in the space formed by the first spiral groove 42 and the second spiral groove 45, so that the fixed disk 48 is stably placed relative to the transmission shaft 43, and the polygonal shaft 46 is inserted into the transmission shaft 43. Therefore, the rotation of the flexible shaft 6 can be controlled through the transmission shaft 43, and then the rotation of the cleaning mechanism 5 can be controlled. The fixed disk 48, the first flange 41, the clamping arc plates 44, etc. form a connection mechanism 4.

[0046] As Figure 4 shown in the figure, in order to stably install the flexible shaft 6 on the fixed disk 48, pressing plates 49 are arranged on the side of the fixed disk 48 and connected by bolts. Grooves 491 are arranged on the edges of the two pressing plates 49 close to each other. An end disk 61 is fixedly arranged at the end of the flexible shaft 6. The end disk 61 is arranged in the space formed by the pressing plate 49 and the fixed disk 48, so that the flexible shaft 6 and the end disk 61 can be stably connected, and it is convenient to disassemble the flexible shaft 6 and the fixed disk 48 according to requirements.

[0047] As Figure 6As shown in the figure, in order to stably install the cleaning mechanism 5 on the flexible shaft 6, a fixing plate 56 is fixedly arranged at the end of the sleeve 52, and a clamping plate 55 is adjustably arranged. The clamping plate 55 and the fixing plate 56 are connected by bolts. After the sleeve 52 is sleeved on the flexible shaft 6, by rotating the bolts, the movement of the clamping plate 55 can be controlled, and the clamping plate 55 cooperates with the fixing plate 56 to clamp the flexible shaft 6, so that the sleeve 52 is stably installed relative to the flexible shaft 6.

[0048] As Figure 6 shown in the figure, in order to stably and movably arrange the clamping plate 55 at the end of the sleeve 52, a snap groove 53 is arranged on the end face of the sleeve 52. The central angle of the snap groove 53 is greater than 180°, and the end is set as an opening. A snap post 54 is fixedly arranged at the end of the clamping plate 55. The snap post 54 is located in the snap groove 53. With the cooperation of the snap post 54 and the snap groove 53, the movable connection between the clamping plate 55 and the sleeve 52 can be realized.

[0049] As Figure 5 shown in the figure, with the cooperation of the fixing plate 56 and the clamping plate 55, the cleaning mechanism 5 can be stably connected to the flexible shaft 6. Therefore, multiple sets of cleaning mechanisms 5 can be arranged according to requirements. For example, the connected cleaning mechanisms 5 are not arranged on the same plane, even if the adjacent cleaning mechanisms 5 are in a non-parallel state, so as to quickly clean the water scale under the action of multiple sets of cleaning mechanisms 5.

[0050] As Figure 13 shown in the figure, in order to make the cleaning mechanism 5 more adaptable to the pipeline environment and facilitate its work of cleaning the water scale, the connecting plate 51 includes a first plate body 511 and a second plate body 514. The first plate body 511 is set as a U-shaped structure, and a clamping groove 512 is arranged on the inner side wall. At the same time, a bolt penetrates through the end. A plurality of through holes are arranged on the side wall of the second plate body 514, and a clamping plate 513 is fixedly arranged on the side wall. The end of the second plate body 514 is inserted into the first plate body 511, the clamping plate 513 is located in the clamping groove 512, and the bolt penetrates through a certain through hole. When the length of the connecting plate 51 needs to be adjusted, only the position where the bolt penetrates through the through hole needs to be adjusted.

[0051] As Figure 1 、 Figure 2 、 Figure 7As shown in the figure, in order to facilitate the transfer of the position of the motor 3 according to requirements, a pallet 35 is provided below the motor 3, a plurality of universal wheels 32 are provided below the pallet 35, and a push plate 31 is provided at the end of the pallet 35. Therefore, it is convenient for the staff to push the push plate 31 to control the movement of the pallet 35 and realize the adjustment of the position of the motor 3. In order to stably place the pallet 35 after adjusting the position, a threaded rod 33 is provided through the end of the pallet 35 in a threaded manner, and a bottom plate 34 is provided at the bottom of the threaded rod 33. The height of the bottom plate 34 can be controlled by rotating the threaded rod 33, so that after adjusting the position of the motor 3, the bottom plate 34 can be lowered to fit the ground, realizing the stable placement of the pallet 35 and the motor 3.

[0052] In actual production, the flexible shaft 6 and the conveying pipe 1 can be installed on the same flange, such as on the first flange 41, or the flexible shaft 6 and the conveying pipe 1 can be respectively arranged on two flanges (such as the first flange 41 and the second flange 7), and the two flanges are arranged at both ends of the heat pipeline.

[0053] In order to realize the stable operation of the device, the transmission shaft 43, the fixed disk 48, etc. are made of alloy materials. For example, stainless steel is made by adding elements such as chromium (Cr), nickel (Ni), and molybdenum (Mo) to steel, changing the internal tissue structure of the metal, thereby improving acid resistance. The sealing ring, the flexible shaft 6, etc. are made of acid-resistant materials, such as nitrile rubber, fluororubber, etc., and rely on their strong acid resistance to ensure that they drive the cleaning mechanism 5 to rotate.

[0054] Embodiment 2

[0055] As Figures 9 - 12 As shown in the figure, on the basis of Embodiment 1, in order to be able to adjust the position of the cleaning mechanism 5 according to requirements and realize more comprehensive cleaning of the scale in the heat pipeline, a driving shaft 8 can be fixedly arranged on the side of the fixed disk 48. The driving shaft 8 is set as a polygonal structure, a polygonal hole 73 is arranged on the transmission shaft 43, the driving shaft 8 penetrates through the polygonal hole 73, and a sealing gasket can be arranged on the contact surface to realize the sealed movable connection between the transmission shaft 43 and the driving shaft 8. Therefore, it is convenient to control the movement of the driving shaft 8 to drive the movement of multiple sets of cleaning mechanisms 5. The above setting is an improvement on the connection method between the fixed disk 48 and the transmission shaft 43 in the previous embodiment.

[0056] In the case of setting the driving shaft 8, in order to control the rotation of the transmission shaft 43, a shaft body 71 also needs to be inserted and connected through a bearing on the flange. Meshing gears 74 are respectively arranged on the transmission shaft 43 and the shaft body 71, and the end of the shaft body 71 is connected to the motor 3 through a coupling. Therefore, when the motor 3 works, the rotation of the transmission shaft 43 and the shaft body 71 can be controlled, and then multiple sets of cleaning mechanisms 5 can be driven to rotate.

[0057] In order to drive the movement of multiple sets of cleaning mechanisms 5, a handle 9 is provided on the side of the flange. A plug slot 91 is provided on the handle 9. An end post 81 is fixedly provided at the end of the driving shaft 8. The end post 81 is inserted into the plug slot 91 through a bearing connection. When the flexible shaft 6 and the driving shaft 8 rotate, it is convenient to control the back-and-forth movement of the handle 9 to adjust the position of the cleaning mechanism 5.

[0058] The material of the driving shaft 8 can be determined according to requirements. For example, it can be set as a flexible structure (such as made of nitrile rubber), or it can be set as a rigid structure (such as made of alloy).

[0059] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A thermal pipeline chemical descaling injector, characterized in that: The invention comprises a liquid pump (2), the output end of which is connected to a delivery pipe (1), a flange being arranged at the end of the delivery pipe (1), and the flange being detachably mounted on a thermal pipeline; a flexible shaft (6), which extends into the thermal pipeline and has an end connected to the flange, a plurality of cleaning mechanisms (5) being arranged at intervals on the flexible shaft (6), and the cleaning mechanisms (5) being located in the thermal pipeline; and a motor (3), which can be connected to the flexible shaft (6) or the rotating shaft of the liquid pump (2).

2. A thermal pipeline chemical descaling injector according to claim 1, characterized in that: The cleaning mechanism (5) comprises a sleeve (52), two connecting plates (51) and two friction discs (57). The two connecting plates (51) are symmetrically and hingedly arranged on the sides of the sleeve (52). The two friction discs (57) are respectively arranged at one end of the two connecting plates (51) away from the sleeve (52).

3. A thermal pipeline chemical descaling injector according to claim 2, characterized in that: A fixing plate (56) is fixedly provided at the end of the sleeve (52), and a buckle groove (53) is provided on the end surface; a clamping plate (55) is provided on the side of the fixing plate (56) via bolts; a buckle column (54) is fixedly provided at the end of the clamping plate (55); the buckle column (54) is located in the buckle groove (53); the central angle of the buckle groove (53) is greater than 180°, and the end is set to be open.

4. A thermal pipeline chemical descaling injector according to claim 3, characterized in that: The flexible shaft (6) penetrates the sleeve (52) and the space formed by the fixing plate (56) and the clamping plate (55); the two adjacent cleaning mechanisms (5) are in a mutually perpendicular state.

5. A thermal pipeline chemical descaling injector according to claim 1, characterized in that: A transmission shaft (43) is provided through the middle of the flange, a fixing plate (48) is detachably provided at the end of the transmission shaft (43), an extrusion plate (49) is provided on the side of the fixing plate (48) and connected by bolts, and grooves (491) are provided on the edges of the two extrusion plates (49) close to each other; an end plate (61) is fixedly provided at the end of the flexible shaft (6), and the end plate (61) is arranged in a space formed by the extrusion plate (49) and the fixing plate (48).

6. A thermal pipeline chemical descaling injector according to claim 5, characterized in that: A polygonal shaft (46) and a bent tube (47) are arranged on one side of the fixed disk (48) away from the extrusion plate (49), and the polygonal shaft (46) is inserted into the transmission shaft (43); a clamping arc plate (44) is arranged on the outer side of the transmission shaft (43), and a first spiral groove (42) and a second spiral groove (45) are respectively arranged on the side walls of the transmission shaft (43) and the clamping arc plate (44), and the bent tube (47) is located in the space formed by the first spiral groove (42) and the second spiral groove (45); the end of the transmission shaft (43) is connected to the motor (3) through a coupling.

7. A thermal pipeline chemical descaling injector according to claim 5, characterized in that: A driving shaft (8) is fixedly arranged on the side of the fixed disk (48). The driving shaft (8) is arranged in a polygonal structure. A polygonal hole (73) is arranged on the transmission shaft (43), and the driving shaft (8) penetrates through the polygonal hole (73). A shaft body (71) is connected and inserted on the flange through a bearing. Gears (74) that mesh with each other are respectively arranged on the transmission shaft (43) and the shaft body (71). The end of the shaft body (71) is connected to the motor (3) through a coupling.

8. A thermal pipeline chemical descaling injector according to claim 7, characterized in that: A handle (9) is arranged on the side of the flange. A plug slot (91) is arranged on the handle (9). An end post (81) is fixedly arranged at the end of the driving shaft (8). The end post (81) is inserted into the plug slot (91) through a bearing connection.

9. A thermal pipeline chemical descaling injector according to claim 1, characterized in that: A support plate (35) is arranged below the motor (3). A plurality of universal wheels (32) are arranged below the support plate (35), and a push plate (31) is arranged at the end of the support plate (35). A threaded rod (33) penetrates through the end of the support plate (35). A bottom plate (34) is arranged at the bottom of the threaded rod (33).

10. A thermal pipeline chemical descaling injector according to claim 2, characterized in that: The connecting plate (51) includes a first plate body (511) and a second plate body (514). The first plate body (511) is arranged in a U-shaped structure, and a clamping groove (512) is arranged on the inner side wall. The end of the second plate body (514) is inserted into the first plate body (511), and a clamping plate (513) fixedly installed on the second plate body (514) is located in the clamping groove (512).

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