Automatic pipeline cleaning device

Abstract

The utility model relates to a kind of pipeline automatic cleaning device, the device includes shell, pipe flange mounting groove for installing pipeline to be cleaned is set in the top end of shell, hollow screw rod is located in shell and its top end penetrates the bottom end of pipe flange mounting groove, hollow screw rod is threadedly matched with shell;Spray head is connected and is communicated at the top end of hollow screw rod;Rotary joint is installed with the drive mechanism of transmission cooperation with hollow screw rod;Rotary joint is limit sliding fit on the inner wall of shell along with the direction parallel to hollow screw rod, and the rotating end and its fixed end of rotary joint are connected and are communicated at the bottom end of hollow screw rod and one end of flexible hose respectively;The other end of flexible hose is used for nitrogen and clean water to be input;Second pipeline is connected and is communicated on flexible hose and is installed with first valve.The utility model can guarantee the health safety of operator, improve the cleaning efficiency and cleaning quality of pipeline, reduce artificial cost.

Description

Technical Field

[0001] This utility model relates to the field of automatic pipeline cleaning technology, and in particular to an automatic pipeline cleaning device. Background Technology

[0002] Pipelines are used to guide the flow of gases or liquids. For example, in the hot-test assembly area of ​​a rocket engine, pipes (such as those used in rocket engine test systems) are required for gas or liquid flow tests. Pipes used in rocket engine test systems typically include pump inlet pipes and rocket bellows. For engine systems, the control of foreign matter is particularly important; therefore, the interiors of the pump inlet pipes and rocket bellows need to be cleaned to prevent the accumulation of foreign matter.

[0003] Traditional methods for cleaning pump inlet pipes and rocket bellows are usually performed manually, which has at least the following drawbacks: 1. Because the pump inlet pipe has multiple connecting nozzles and bypass ports, and the rocket corrugated pipe has a multi-groove structure, both are prone to accumulating dirt and grime. Manual cleaning of the pump inlet pipe and rocket corrugated pipe is not easy to thoroughly clean the dirt-accumulating areas (i.e., dead corners) of the pump inlet pipe and rocket corrugated pipe, resulting in low cleaning quality.

[0004] 2. Since cleaning agents are usually irritating liquids, when cleaning the pump inlet pipe and rocket bellows manually, the cleaning agents can easily cause harm to the operator's body, and the health and safety of the operator cannot be guaranteed.

[0005] 3. Manually cleaning the pump inlet pipe and rocket corrugated pipe is not only inefficient, but also increases labor costs.

[0006] Therefore, there is an urgent need for an automatic pipeline cleaning device to automatically clean pipelines (such as pipes used in rocket engine test systems) and thus avoid the aforementioned defects. Utility Model Content

[0007] The purpose of this invention is to provide an automatic pipeline cleaning device to solve the problems existing in the prior art.

[0008] To achieve the above objectives, this utility model provides the following solution: This utility model provides an automatic pipeline cleaning device, including a housing, a hollow lead screw, a nozzle, a rotary joint, a telescopic hose, and a second pipeline, wherein: The top of the housing has a pipe flange mounting groove for installing the pipe to be cleaned. The hollow screw is located inside the housing and its top end passes through the bottom end of the pipe flange mounting groove. The hollow screw is threaded into the housing. The nozzle is connected to and communicates with the top end of the hollow screw. The rotary joint is equipped with a drive mechanism that engages with the hollow lead screw. The drive mechanism is located at the bottom of the hollow lead screw and between the rotary joint and the inner wall of the top of the housing. The rotary joint is slidably fitted onto the inner wall of the housing in a direction parallel to the hollow lead screw. The rotating end and the fixed end of the rotary joint are respectively connected to and communicate with the bottom end of the hollow lead screw and one end of the telescopic hose. The other end of the telescopic hose is used to introduce nitrogen and clean water. The second pipe is connected to and communicates with the telescopic hose, and its end away from the telescopic hose is used to introduce cleaning agent; a first valve is installed on the second pipe.

[0009] According to one embodiment of the present invention, one side wall of the housing is an open structure, the housing is provided with a door, the door is correspondingly provided with the open structure of the housing and adapted to the open structure of the housing; one end of the door is hinged to the housing, and the other end of the door is detachably connected to the housing; A cleaning agent container is installed on the outer wall of the housing. The cleaning agent container is a hollow structure with an open top. The cleaning agent container is located directly above the telescopic hose. The end of the second pipe away from the telescopic hose is connected to and communicates with the bottom end of the cleaning agent container.

[0010] According to one embodiment of the present invention, a mounting block is installed on the outer wall of the rotary joint, and the driving mechanism is mounted on the mounting block. The driving mechanism is mounted on the rotary joint through the mounting block. The drive mechanism includes a reducer and a motor. The reducer is located at the bottom of the hollow lead screw and between the rotary joint and the top inner wall of the housing. The output end of the reducer is driven by a connecting shaft. The connecting shaft is coaxially arranged with the hollow lead screw and is fixedly connected to the hollow lead screw. The motor is mounted on the mounting block, and the output shaft of the motor is driven by the input end of the reducer; A connecting block is installed on the outer wall of the reducer. The end of the connecting block away from the reducer is connected to the mounting block. The reducer is mounted on the mounting block through the connecting block.

[0011] According to one embodiment of the present invention, the hollow lead screw is arranged in a vertical direction; A limiting sliding block is installed on the mounting block, and a limiting sliding groove is formed on the inner wall of the housing in a direction parallel to the hollow lead screw. The limiting sliding block is adapted to and slides inside the limiting sliding groove. The rotary joint is limited and slides on the inner wall of the housing through the limiting sliding block and the limiting sliding groove. The reducer is a worm gear reducer.

[0012] According to one embodiment of the present invention, a first limit switch and a second limit switch are installed on the mounting block, the first limit switch is located above the second limit switch, and both the first limit switch and the second limit switch are electrically connected to the motor. A lower switch limit block and an upper switch limit block are installed on the inner wall of the housing, and the upper switch limit block is located above the lower switch limit block. The lower switch limit block is fixedly connected to the inner wall of the housing, and the upper switch limit block is adjustablely connected to the inner wall of the housing in a direction parallel to the hollow lead screw. Both the lower switch limit block and the upper switch limit block are provided with inclined structures. The pressing end of the second limit switch is correspondingly set to the inclined structure of the lower switch limit block and is configured to contact and cooperate with the inclined structure of the lower switch limit block. The pressing end of the first limit switch is correspondingly set to the inclined structure of the upper switch limit block and is configured to contact and cooperate with the inclined structure of the upper switch limit block.

[0013] According to one embodiment of the present invention, an adjusting through hole is provided on the side wall of the housing along a direction parallel to the hollow lead screw. The adjusting through hole is correspondingly provided with the upper switch limiting block. An adjusting bolt is provided inside the adjusting through hole. The threaded rod of the adjusting bolt is threadedly engaged with the upper switch limiting block and is configured to slide inside the adjusting through hole. The bolt head of the adjusting bolt is located outside the housing and is configured to abut against the outer side wall of the housing. The upper switch limiting block is adjustablely connected to the inner side wall of the housing through the adjusting through hole and the adjusting bolt.

[0014] According to one embodiment of the present invention, a second pulley is rotatably mounted on the pressing end of the second limit switch. The second pulley is correspondingly arranged with the inclined structure of the lower switch limit block and is configured to be able to contact and cooperate with the inclined structure of the lower switch limit block. The pressing end of the second limit switch is correspondingly arranged with the inclined structure of the lower switch limit block through the second pulley. The pressing end of the first limit switch is rotatably mounted with a first pulley. The first pulley is correspondingly set to the inclined structure of the upper switch limit block and is configured to contact and cooperate with the inclined structure of the upper switch limit block. The pressing end of the first limit switch is correspondingly set to the inclined structure of the upper switch limit block through the first pulley.

[0015] According to one embodiment of the present invention, a discharge pipe is installed on the housing. The discharge pipe is inclined, with the highest end of the inclined discharge pipe installed at the top of the housing and communicating with the interior of the pipe flange mounting groove. The connection between the discharge pipe and the interior of the pipe flange mounting groove is located on one side of the hollow screw rod, and the lowest end of the inclined discharge pipe is located outside the housing.

[0016] According to one embodiment of the present invention, the end of the telescopic hose away from the rotary joint is connected to a first pipe, and the end of the first pipe away from the telescopic hose is used to introduce nitrogen and clean water; the second pipe is connected to and communicates with the first pipe, and the second pipe is connected to the telescopic hose through the first pipe. The first pipeline is equipped with a second valve, a pressure reducing valve, and a pressure gauge. The second valve, the pressure reducing valve, and the pressure gauge are all located at the end of the second pipeline away from the telescopic hose. The second valve is located between the second pipeline and the pressure gauge, and the pressure gauge is located between the second valve and the pressure reducing valve.

[0017] According to one embodiment of the present invention, a plurality of casters are installed at the bottom end of the housing.

[0018] Beneficial effects This utility model has at least the following technical effects: This invention, through the configuration of a shell, hollow lead screw, nozzle, rotary joint, telescopic hose, drive mechanism, and second pipe, enables automatic cleaning of pipes (such as pipes used in rocket engine test systems). This not only avoids harm to operators and ensures their health and safety, but also improves cleaning efficiency, reduces labor costs, and thoroughly cleans the dirt-laden areas (i.e., dead corners) of the pipes used in rocket engine test systems, thus improving cleaning quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1A magnified view of a section at point B in the middle; Figure 4 for Figure 1 A magnified view of a section at point C; Figure 5 for Figure 1 A schematic diagram of the overall structure from another angle; Figure 6 for Figure 5 A schematic diagram of the overall structure from another angle; Figure 7 for Figure 6 A schematic diagram of the overall structure from another angle; Figure 8 This is a top view of the overall structure of this utility model; Figure 9 for Figure 8 A cross-sectional view of the overall structure along the ZZ direction. Figure 10 This is a schematic diagram of the internal overall structure of the reducer in this utility model; Figure 11 for Figure 10 A schematic diagram of the overall structure from another angle.

[0021] Explanation of reference numerals in the attached figures: 1. Housing; 2. Door; 3. Casters; 4. Hollow lead screw; 5. Rotary joint; 6. Mounting block; 7. Telescopic hose; 8. Limiting sliding block; 9. Limiting sliding groove; 10. Reducer; 11. Connecting block; 12. Connecting shaft; 13. Motor; 14. Nozzle; 15. Pipe flange mounting groove; 16. Discharge pipe; 17. First limit switch; 18. First pulley; 19. Second limit switch; 20. Second pulley; 21. Lower switch limit block; 22. Upper switch limit block; 23. Adjusting through hole; 24. Adjusting bolt; 25. First pipe; 26. Second pipe; 27. Cleaning agent container; 28. First valve; 29. ​​Second valve; 30. Pressure reducing valve; 31. Pressure gauge. Detailed Implementation

[0022] The features and exemplary embodiments of various aspects of this utility model will be described in detail below. To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this utility model and to exemplarily illustrate the principles of this utility model, and are not configured to limit this utility model. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of this utility model.

[0023] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this utility model. In the description of this utility model, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0025] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., without specifically indicating order or sequence, and should not be considered restrictive. Similar terms are used throughout the description to represent similar elements.

[0026] For those skilled in the art, this invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples.

[0027] In the following embodiments, there may be descriptions such as "this device" or "the device". Those skilled in the art should understand that "this device" or "the device" refers to an automatic pipe cleaning device provided by this utility model.

[0028] Firstly, such as Figures 1-10 As shown, this utility model provides an automatic pipe cleaning device, which includes at least a housing 1, a hollow lead screw 4, a nozzle 14, a rotary joint 5, a telescopic hose 7, and a second pipe 26, wherein: like Figure 1 , Figure 6 , Figures 7-9As shown, the top of housing 1 (i.e., located at...) Figure 1 The top of the housing 1 has a pipe flange mounting groove 15 for installing the pipe to be cleaned (not shown in the figure). That is, the pipe flange mounting groove 15 is opened at the top of the housing 1, and the pipe flange mounting groove 15 can be used to install the pipe to be cleaned.

[0029] In this embodiment, the pipe to be cleaned is the pipe that needs to be automatically cleaned using this device. Specifically, the pipe to be cleaned in this embodiment is an example of a pipe used in a rocket engine test system (not shown in the figure), and more particularly, a rocket-grade corrugated pipe (not shown in the figure) within the rocket engine test system pipe.

[0030] In this embodiment, as Figure 1 As shown, the housing 1 can be a cuboid structure, the pipe flange mounting groove 15 can be a cylindrical structure, and the pipe flange mounting groove 15 can be opened at the center of the top outer wall of the housing 1.

[0031] It should be understood that the cross-sectional area (i.e., the section perpendicular to its axial direction) of the pipe flange mounting groove 15 can be the same as the cross-sectional area (i.e., the section perpendicular to its axial direction) of the pipe flange of the rocket bellows (i.e., the flange plate of the rocket bellows pipe flange) (not shown in the figure). Since both the cross-section of the pipe flange mounting groove 15 and the cross-section of the rocket bellows pipe flange are circular, meaning the pipe flange mounting groove 15 is compatible with the rocket bellows pipe flange, the rocket bellows flange can be installed (embedded) inside the pipe flange mounting groove 15, i.e., the rocket bellows is installed inside the pipe flange mounting groove 15. Since the rocket bellows pipe flange and the rocket bellows are coaxial, when the rocket bellows is installed inside the pipe flange mounting groove 15, the rocket bellows will be coaxial with the axial direction of the pipe flange mounting groove 15. That is, when the rocket bellows is installed inside the pipe flange mounting groove 15, the rocket bellows will move along... Figure 5 Set in the vertical direction.

[0032] In this embodiment, the thickness of the pipe flange mounting groove 15 can be the same as the thickness of the pipe flange of the rocket bellows. That is, when the pipe flange of the rocket bellows is installed inside the pipe flange mounting groove 15, the top of the pipe flange of the rocket bellows will be flush with the top outer wall of the shell 1.

[0033] In this embodiment, as Figure 1 As shown, several bolt holes are provided at the bottom end of the pipe flange mounting groove 15. Figure 1(Taking four as an example), and these bolt holes are set one-to-one with the bolt holes (i.e., flange holes, not shown in the figure) on the pipe flange of the rocket bellows, and can be the same size. When the flange of the rocket bellows is installed inside the pipe flange mounting groove 15, the flange of the rocket bellows can be fixed inside the pipe flange mounting groove 15 by flange fixing bolts (not shown in the figure and known in the art). That is, the flange fixing bolts can be threaded into the bolt holes opened at the bottom of the pipe flange mounting groove 15, thereby realizing the mutual fixation of the rocket bellows and the shell 1.

[0034] like Figure 1 and Figure 5 As shown, the hollow screw 4 is located inside the housing 1 and its top end (i.e. the top end of the hollow screw 4) penetrates the bottom end of the pipe flange mounting groove 15. The hollow screw 4 is threadedly engaged with the housing 1 (i.e., the connection between the hollow screw 4 and the housing 1 is threaded).

[0035] Preferably, such as Figure 1 As shown, the top end of the hollow screw 4 can penetrate the center position of the bottom end of the pipe flange mounting groove 15, that is, the top end of the hollow screw 4 can penetrate the center position of the bottom end of the pipe flange mounting groove 15 and can extend into the outside of the housing 1, and the connection between the hollow screw 4 and the housing 1 (that is, the penetration point between the hollow screw 4 and the bottom end of the pipe flange mounting groove 15) is in a threaded engagement state.

[0036] More preferably, the axial direction of the hollow screw 4 can be along the vertical direction (i.e., Figure 5 The vertical direction is set. Therefore, when cleaning the inside of the rocket bellows installed inside the pipe flange mounting groove 15, the inside of the rocket bellows can be cleaned more evenly.

[0037] In this embodiment, the hollow lead screw 4 is a hollow structure with open ends, that is, the hollow lead screw 4 is a hollow structure with open ends (not shown in the figure).

[0038] Furthermore, such as Figure 3 As shown, a spring-loaded sealing ring (i.e., a plug ring) can be installed at the connection between the hollow screw 4 and the housing 1 (that is, at the connection between the hollow screw 4 and the bottom end of the pipe flange mounting groove 15). The outer ring of this spring-loaded sealing ring can be connected to the housing 1, and its inner ring can contact the side wall of the hollow screw 4 (or it can be a micro-clear gap fit with a very small clearance), thereby improving the sealing performance at the connection between the hollow screw 4 and the housing 1. The spring-loaded sealing ring is prior art known in the art and will not be described in detail here.

[0039] like Figure 1 and Figure 3As shown, the nozzle 14 is connected to and communicates with the top end of the hollow screw 4. Since the top end of the hollow screw 4 extends into the outside of the housing 1 (that is, the top end of the hollow screw 4 is located outside the housing 1), the nozzle 14 is also located outside the housing 1 and above the housing 1, that is, above the pipe flange mounting groove 15.

[0040] In this embodiment, as Figure 3 As shown, the nozzle on the nozzle 14 can be two, and can be arranged symmetrically on both sides of the nozzle 14 in a horizontal direction. The nozzle on the nozzle 14 can be an air knife nozzle (not shown in the figure) known in the art, and is not particularly limited here.

[0041] like Figure 2 As shown, a drive mechanism that engages with the hollow lead screw 4 is mounted on the rotary joint 5. The drive mechanism can be located inside the housing 1, at the bottom of the hollow lead screw 4, and between the rotary joint 5 and the inner wall of the top of the housing 1. For example, the bottom end of the drive mechanism and the bottom end of the rotary joint 5 can be in a clearance fit, thereby ensuring the normal lifting and lowering of the hollow lead screw 4 and preventing the drive mechanism from colliding with the inner wall of the top of the housing 1 during the lifting and lowering of the hollow lead screw 4.

[0042] Specifically, such as Figure 2 As shown, a mounting block 6 is installed on the outer wall of the rotary joint 5, and the drive mechanism is installed on the mounting block 6, that is, the drive mechanism is installed on the rotary joint 5 through the mounting block 6.

[0043] In this embodiment, as Figure 2 As shown, the mounting block 6 can be a cuboid structure, and the mounting block 6 can be installed on the bottom outer wall of the rotary joint 5.

[0044] More specifically, such as Figure 2As shown, the drive mechanism includes at least a reducer 10 and a motor 13. The reducer 10 can be located inside the housing 1, and is situated at the bottom of the hollow lead screw 4, between the rotary joint 5 and the inner wall of the top of the housing 1. That is, the bottom end of the reducer 10 and the bottom end of the rotary joint 5 can be in a clearance fit. The output end of the reducer 10 is driven by a connecting shaft 12, which is coaxially arranged with and fixedly connected to the hollow lead screw 4. The output end of the reducer 10 can be driven by the hollow lead screw 4 through the connecting shaft 12. The motor 13 is mounted on the mounting block 6, and can also be located inside the housing 1. The output shaft of the motor 13 (i.e., the output end of the motor 13) is driven by the input end of the reducer 10. In this embodiment, the motor 13 can be a DC motor or a pneumatic motor (i.e., a pneumatic rotary motor), as known in the art, and is not particularly limited here. When the motor 13 is a DC motor, it can be powered by an external battery (not shown in the figure but known in the art), and is not particularly limited here. When motor 13 is a pneumatic motor, it can be powered by compressed air from an external air pump (not shown in the figure and known in the art), without any particular limitation.

[0045] In this embodiment, as Figure 2 As shown, the fixed end of motor 13 (i.e. Figure 2 An L-shaped motor connecting plate can be installed on the right end of the motor 13. The end of the motor connecting plate away from the motor 13 is connected to the outer wall of the mounting block 6, that is, the motor 13 is connected to the mounting block 6 through the motor connecting plate. The connection method between the motor connecting plate and the motor 13 and the mounting block 6 can be a bolt connection (not shown in the figure) known in the art, and is not particularly limited here.

[0046] In this embodiment, as Figure 10 and Figure 11 As shown, the reducer 10 can be a worm gear reducer known in the art. For example... Figure 10 As shown, Figure 10An exemplary schematic diagram of the overall internal structure of the reducer 10 is shown. The reducer 10 can be considered as including a square reducer housing, with a worm gear and worm rotatably mounted inside the reducer housing, and the worm gear and worm meshing with each other. The output shaft of the motor 13 can be coaxially arranged with the worm and engage with the worm gear drive. The connecting shaft 12 can be coaxially arranged with the worm gear and fixedly connected to the worm gear. Both the connecting shaft 12 and the worm gear can have a centrally opened structure. The top and bottom ends of the reducer housing can also have open structures. The holes on the reducer housing, the connecting shaft 12, and the worm gear can be the same size and coaxially arranged. The hollow lead screw 4 can be located inside both the holes on the reducer housing and the holes on the connecting shaft 12 and the worm gear. The inner wall of the hole on the connecting shaft 12 is fixedly connected to the outer wall of the hollow lead screw 4.

[0047] In the above, the fixed connection between the connecting shaft 12 and the worm gear, and between the inner wall of the hole on the connecting shaft 12 and the outer wall of the hollow lead screw 4, can all be connected by welding connection methods known in the art, and no particular limitation is made here.

[0048] In the above description, the rotatable connection between the worm gear and the reducer housing, and between the worm and the reducer housing, can all be achieved through bearings (not shown in the figure) known in the art, and are not particularly limited here. Since the bearing has an inner ring, the hollow lead screw 4 will also be located inside the inner ring of the bearing.

[0049] like Figure 2 As shown, a connecting block 11 is installed on the outer wall of the reducer 10, and the end of the connecting block 11 away from the reducer 10 (i.e., Figure 2 The bottom end of the connecting block 11 is connected to the mounting block 6, that is, the reducer 10 can be mounted on the outer wall of the mounting block 6 through the connecting block 11.

[0050] In this embodiment, as Figure 2 As shown, the connecting block 11 can be a cuboid structure, and there can be two connecting blocks 11, which are sequentially installed at both ends of the outer side wall of the reducer 10. Wherein, as... Figure 2 As shown, the connection between the connecting block 11 and the reducer 10, and between the connecting block 11 and the mounting block 6, can all be connected by bolts as known in the art, and no particular limitation is made here.

[0051] like Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, the rotary joint 5 is slidably fitted onto the inner wall of the housing 1 along a direction parallel to the hollow screw 4. The rotating end and the fixed end of the rotary joint 5 are respectively connected and communicated to the bottom end of the hollow screw 4 and one end of the telescopic hose 7. Figure 5 The left end of the telescopic hose 7, i.e., the rotating end of the rotary joint 5, is connected to and communicates with the bottom end of the hollow screw 4, and the fixed end of the rotary joint 5 is connected to and communicates with one end of the telescopic hose 7. The other end of the telescopic hose 7 is used to introduce nitrogen and clean water.

[0052] In this embodiment, the rotary joint 5 is prior art known in the art and is not particularly limited herein. Specifically, the top end of the rotary joint 5 in this embodiment can be the rotating end of the rotary joint 5, and the side end of the rotary joint 5 in this embodiment can be the fixed end of the rotary joint 5.

[0053] Furthermore, the rotary joint 5 can be a pneumatic rotary joint known in the art, which can further prevent leakage of the rotary joint 5.

[0054] In this embodiment, the telescopic hose 7 can be a flexible PU tube or a corrugated tube known in the art, preferably a corrugated tube, and is not particularly limited herein. It should be understood that this corrugated tube (i.e., the telescopic hose 7) is not the same component as the rocket corrugated tube installed in the pipe flange mounting groove 15 (i.e., the top of the housing 1).

[0055] Specifically, such as Figure 2 , Figure 5 and Figure 9 As shown, a limiting sliding block 8 is installed on the mounting block 6, and a limiting sliding groove 9 is opened on the inner wall of the housing 1 in a direction parallel to the hollow lead screw 4. The limiting sliding block 8 is adapted to the limiting sliding groove 9 and slides inside the limiting sliding groove 9. That is, the rotary joint 5 can be limited and slidably fitted on the inner wall of the housing 1 through the limiting sliding block 8 and the limiting sliding groove 9. In other words, the rotary joint 5 can be limited and slidably fitted with the inner wall of the housing 1 through the limiting sliding block 8 and the limiting sliding groove 9.

[0056] In this embodiment, since the hollow lead screw 4 is arranged in the vertical direction, and the limiting sliding groove 9 is parallel to the hollow lead screw 4, the limiting sliding groove 9 is also arranged in the vertical direction.

[0057] In this embodiment, as Figure 2 As shown, the limiting sliding block 8 can be installed horizontally on the side wall of the mounting block 6. Both the limiting sliding block 8 and the limiting sliding groove 9 can be cuboid structures of the same width, thereby achieving a sliding fit between the outer side wall of the limiting sliding block 8 and the inner side wall of the limiting sliding groove 9 (i.e., achieving a limiting sliding fit between the limiting sliding block 8 and the limiting sliding groove 9).

[0058] In this embodiment, the rotary joint 5 and the mounting block 6, and the mounting block 6 and the limiting sliding block 8 can be connected by bolts (not shown in the figure) or welding, which are known in the art, and are not particularly limited here.

[0059] When motor 13 is started, it causes the worm gear to rotate, which in turn causes the worm wheel to rotate, thus achieving the effect of speed reduction and torque increase. The rotation of the worm wheel drives the connecting shaft 12 to rotate. Since the connecting shaft 12 is coaxial with and fixedly connected to the hollow lead screw 4, the rotation of the connecting shaft 12 drives the hollow lead screw 4 to rotate. Because the connection between the hollow lead screw 4 and the housing 1 is threaded, and the hollow lead screw 4 is limited and slidably engaged by the rotary joint 5, mounting block 6, limiting sliding block 8, and limiting sliding groove 9, the rotation of the hollow lead screw 4 causes it to move synchronously up and down along its axial direction. At the same time, the rotary joint 5, reducer 10, mounting block 6, connecting block 11, limiting sliding block 8, and motor 13 will only move synchronously up and down with the hollow lead screw 4, and will not rotate themselves.

[0060] like Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the second pipe 26 is connected to and communicates with the telescopic hose 7, and the end of the second pipe 26 away from the telescopic hose 7 is used to introduce cleaning agent. A first valve 28 is installed on the second pipe 26. Specifically, a cleaning agent container 27 is installed on the outer wall of the housing 1, and the interior of the cleaning agent container 27 can be used to contain cleaning agent. The cleaning agent container 27 can be a hollow structure with an open top, and the cleaning agent container 27 is located directly above the telescopic hose 7. The end of the second pipe 26 away from the telescopic hose 7 is connected to and communicates with the bottom end of the cleaning agent container 27. In this embodiment, the cleaning agent container 27 can be a cylindrical structure, which is not particularly limited here.

[0061] More specifically, such as Figure 5 As shown, the end of the telescopic hose 7 furthest from the rotary joint 5 (i.e. Figure 5 The right end of the flexible hose 7 is connected to a first pipe 25, the end of which, away from the flexible hose 7, is used to introduce nitrogen and water. A second pipe 26 is connected to and connected to the first pipe 25, meaning the second pipe 26 is connected to the flexible hose 7 via the first pipe 25. At this time, the cleaning agent container 27 is located directly above the first pipe 25, and the end of the second pipe 26 away from the first pipe 25 is connected to and connected to the bottom of the cleaning agent container 27.

[0062] In this embodiment, the first pipe 25 and the second pipe 26 can both be rigid pipes known in the art, such as PVC pipes, and are not particularly limited here.

[0063] In this embodiment, the cleaning agent can be alcohol (ethanol solution) or carbon tetrachloride, which are known in the art, preferably alcohol, but not particularly limited herein.

[0064] In this embodiment, the first valve 28 is a prior art known in the art. For example, it can be a valve known in the art that can switch liquids on and off, thereby enabling the cleaning agent in the second pipe 26 to switch the cleaning agent in the second pipe 26 on and off, so as to allow or prevent the cleaning agent in the cleaning agent container 27 and the second pipe 26 from flowing into the first pipe 25.

[0065] In this embodiment, the cleaning agent container 27 and the first pipe 25 can both be installed on the outer wall of the housing 1 by bolt connection (not shown in the figure) as known in the art, and there is no particular limitation.

[0066] In this embodiment, the first pipe 25 can be along the horizontal direction (i.e. Figure 5 The second pipe 26 is positioned horizontally (in the middle), while the cleaning agent container 27 is positioned directly above the first pipe 25. The connection and communication between the second pipe 26 and the first pipe 25 can be achieved using a standard tee pipe (not shown in the figure) known in the art, and is not specifically limited herein.

[0067] Furthermore, in order to make this device more easily movable, such as Figure 5 As shown, the bottom end of housing 1 (i.e. located at...) Figure 5 Several casters are installed at the bottom of the middle section.

[0068] In this embodiment, there can be four casters 3, which can be installed sequentially at the four corners of the bottom of the housing 1 by bolt connection (not shown in the figure).

[0069] According to one embodiment of the present invention, such as Figure 1 , Figure 5 and Figure 6 As shown, one sidewall of the housing 1 has an opening. A door 2 is provided on the housing 1, corresponding to and fitting the size of the opening in the housing 1; that is, the door 2 can be configured to just cover the opening in the housing 1. One end of the door 2 (i.e., Figure 8 The right end of the middle door 2 is hinged to the housing 1, and the other end of the door 2 (i.e. Figure 8 The left end of the middle door 2 is detachably connected to the housing 1.

[0070] In this embodiment, as Figure 1 As shown, the left end of the door 2 can be hinged to the opening structure of the housing 1 by a hinge (not shown) known in the art, without any particular limitation.

[0071] Specifically, the method of detachable connection between door 2 and housing 1 is not particularly limited, and may include, but is not limited to: like Figure 1 , Figure 5 , Figure 6 and Figure 8 As shown, door 2 is located Figure 8 A locking bolt mounting hole can be provided at the left end of the door 1. A locking bolt is installed inside the locking bolt mounting hole, and the outer wall of the bolt shank of the locking bolt abuts against the inner wall of the locking bolt mounting hole, rather than being threaded. This means the locking bolt can be directly pulled out of the locking bolt mounting hole. A locking bolt hole corresponding to the locking bolt mounting hole is provided on the housing 1. The locking bolt hole is designed to be threaded with the bolt shank of the locking bolt. When the door 2 is closed at the opening of the housing 1, the locking bolt is inserted into the locking bolt mounting hole and simultaneously screwed into the locking bolt hole to fix the door 2 at the opening of the housing 1.

[0072] According to one embodiment of the present invention, such as Figure 2 As shown, a first limit switch 17 and a second limit switch 19 are mounted on the mounting block 6. The first limit switch 17 is located above the second limit switch 19, preferably directly above the second limit switch 19. Both the first limit switch 17 and the second limit switch 19 are electrically connected to the motor 13.

[0073] In this embodiment, the first limit switch 17 and the second limit switch 19 can both be connected by bolt connection (not shown in the figure) as known in the art, and no particular limitation is made here.

[0074] In this embodiment, the first limit switch 17 and the second limit switch 19 are existing technologies known in the art, and will not be described in detail here. Both the first limit switch 17 and the second limit switch 19 can be self-resetting push-button type limit switches known in the art.

[0075] In this embodiment, since both the first limit switch 17 and the second limit switch 19 are electrically connected to the motor 13, the first limit switch 17 and the second limit switch 19 can respectively control the motor 13 to rotate forward and reverse. How to control the forward and reverse rotation of the motor using limit switches is prior art known in the art and will not be elaborated upon here.

[0076] like Figure 5 and Figure 9 As shown, a lower switch limiting block 21 and an upper switch limiting block 22 are installed on the inner wall of the housing 1, with the upper switch limiting block 22 located above the lower switch limiting block 21, preferably directly above the lower switch limiting block 21. The lower switch limiting block 21 is fixedly connected to the inner wall of the housing 1, while the upper switch limiting block 22 is adjustablely connected to the inner wall of the housing 1 along a direction parallel to the hollow lead screw 4.

[0077] In this embodiment, the lower switch limit block 21 and the inner wall of the housing 1 can be fixedly connected by bolt connection (not shown in the figure) as known in the art, and no particular limitation is made here.

[0078] like Figure 5 As shown, both the lower switch limit block 21 and the upper switch limit block 22 are equipped with inclined structures. Specifically: The pressing end of the second limit switch 19 is correspondingly set to the inclined structure of the lower switch limit block 21 and is configured to contact and cooperate with the inclined surface of the inclined structure of the lower switch limit block 21. The pressing end of the first limit switch 17 is correspondingly set to the inclined structure of the upper switch limit block 22 and is configured to contact and cooperate with the inclined surface of the inclined structure of the upper switch limit block 22.

[0079] In this embodiment, as Figure 5 As shown, both the lower switch limiting block 21 and the upper switch limiting block 22 can be cuboid structures, and their inclined structures can both be located at the end furthest from the inner wall of the housing 1 (i.e., Figure 5 (The right end of the middle). Among them, the inclined surface of the inclined structure of the lower switch limit block 21 faces towards Figure 5 At the upper right end of the middle, the inclined surface of the inclined structure of the upper switch limit block 22 faces towards Figure 5 The bottom right end of the middle.

[0080] Specifically, such as Figure 5 , Figure 6 and Figure 9 As shown, an adjustment through hole 23 is provided on the side wall of the housing 1 (i.e., on the side wall corresponding to the upper switch limit block 22) in a direction parallel to the hollow lead screw 4. The adjustment through hole 23 is correspondingly set to the upper switch limit block 22. Figure 6 As shown, an adjusting bolt 24 is installed inside the adjusting through hole 23. The threaded rod of the adjusting bolt 24 is threadedly engaged with the upper switch limiting block 22 and is configured to be able to slide within the adjusting through hole 23, meaning the threaded rod of the adjusting bolt 24 can slide vertically within the adjusting through hole 23. The bolt head of the adjusting bolt 24 is located outside the housing 1 and is configured to abut against the outer wall of the housing 1, meaning the upper switch limiting block 22 can be adjusted to the inner wall of the housing 1 through the adjusting through hole 23 and the adjusting bolt 24.

[0081] In this embodiment, since the hollow lead screw 4 is arranged in the vertical direction, and the adjustment through hole 23 is parallel to the hollow lead screw 4, the adjustment through hole 23 is also arranged in the vertical direction.

[0082] Furthermore, in order to reduce the friction between the pressing end of the second limit switch 19 and the inclined surface of the inclined structure of the lower switch limit block 21, and between the pressing end of the first limit switch 17 and the inclined surface of the inclined structure of the upper switch limit block 22, such as... Figure 2 As shown, a second pulley 20 is rotatably mounted on the pressing end of the second limit switch 19. The second pulley 20 is correspondingly set to the inclined structure of the lower switch limit block 21 and is configured to contact and cooperate with the inclined surface of the inclined structure of the lower switch limit block 21. That is, the pressing end of the second limit switch 19 is correspondingly set to the inclined structure of the lower switch limit block 21 through the second pulley 20. A first pulley 18 is rotatably mounted on the pressing end of the first limit switch 17. The first pulley 18 is correspondingly set to the inclined structure of the upper switch limit block 22 and is configured to contact and cooperate with the inclined surface of the inclined structure of the upper switch limit block 22. That is, the pressing end of the first limit switch 17 is correspondingly set to the inclined structure of the upper switch limit block 22 through the first pulley 18.

[0083] By setting the first pulley 18 and the second pulley 20, the sliding friction between the pressing end of the second limit switch 19 and the inclined surface of the inclined structure of the lower switch limit block 21, and the sliding friction between the pressing end of the first limit switch 17 and the inclined surface of the inclined structure of the upper switch limit block 22 can be transformed into rolling friction, thereby reducing friction and wear, and extending the service life of the device.

[0084] In addition, the above-mentioned arrangement can also avoid jamming caused by sliding friction between the pressing end of the second limit switch 19 and the inclined surface of the inclined structure of the lower switch limit block 21, and between the pressing end of the first limit switch 17 and the inclined surface of the inclined structure of the upper switch limit block 22, thereby enabling the pressing end of the first limit switch 17 and the pressing end of the second limit switch 19 to be pressed smoothly, ensuring the normal operation of the device.

[0085] According to one embodiment of the present invention, such as Figure 7 and Figure 9 As shown, a discharge pipe 16 is installed on the housing 1. The discharge pipe 16 is inclined, and the highest point of the inclined discharge pipe 16 is installed at the top of the housing 1 and communicates with the interior of the pipe flange mounting groove 15. And as... Figure 8 As shown, the connection between the discharge pipe 16 and the inside of the pipe flange mounting groove 15 is located on one side of the hollow threaded rod 4, and the lowest inclined end of the discharge pipe 16 is located outside the housing 1 (see reference). Figure 7 ).

[0086] In this embodiment, as Figure 9 As shown, the discharge pipe 16 can be located inside the housing 1, and the lowest inclined end of the discharge pipe 16 can penetrate the side wall of the housing 1 and be fixedly connected to the housing 1, that is, the lowest inclined end of the discharge pipe 16 is located outside the housing 1 (see reference). Figure 7 ).

[0087] The discharge pipe 16 allows the discharged waste liquid that has flowed into the pipe flange mounting groove 15 to be drained. For example, when cleaning agent and water are sprayed onto the inner wall of the rocket bellows through the nozzle 14, they flow down the inner wall of the bellows into the pipe flange mounting groove 15 by their own gravity. The discharge pipe 16 then discharges the waste liquid (i.e., the cleaned cleaning agent and water) that has flowed into the pipe flange mounting groove 15. Because the discharge pipe 16 is inclined, the waste liquid can be discharged from the discharge pipe 16 to the outside of the housing 1 by its own gravity.

[0088] According to one embodiment of the present invention, such as Figure 4 , Figure 5 and Figure 7 As shown, a second valve 29, a pressure reducing valve 30, and a pressure gauge 31 are also installed on the first pipe 25. The second valve 29, pressure reducing valve 30, and pressure gauge 31 are all located at the end of the second pipe 26 furthest from the telescopic hose 7. The second valve 29 is located between the second pipe 26 and the pressure gauge 31, and the pressure gauge 31 is located between the second valve 29 and the pressure reducing valve 30. That is, the second valve 29, pressure reducing valve 30, and pressure gauge 31 are all located on the second pipe 26... Figure 4 The right end of the middle.

[0089] In this embodiment, the second valve 29, the pressure reducing valve 30, and the pressure gauge 31 are all prior art known in the art, and will not be described in detail here. Specifically, the second valve 29 can be a valve known in the art capable of simultaneously opening and closing liquids and gases; the pressure reducing valve 30 can be a valve known in the art capable of simultaneously reducing liquid and gas pressures; and the pressure gauge 31 can be a pressure gauge known in the art capable of simultaneously measuring liquid and gas pressures.

[0090] The pressure reducing valve 30 allows for the reduction of pressure in the liquid and gas within the first pipe 25. The pressure gauge 31 allows for the measurement of the pressure in the liquid and gas within the first pipe 25, ensuring the normal operation of the device.

[0091] For example, when the required amount of cleaning agent is small, the pressure reducing valve 30 can be opened to reduce the pressure of the gas (nitrogen in this embodiment).

[0092] Secondly, this utility model also provides a method for using an automatic pipe cleaning device, which includes the steps of using the aforementioned automatic pipe cleaning device, including at least the following steps (taking a pipe used in a rocket engine test system as an example): Step 1: Install the rocket engine test system to be cleaned into the pipe flange mounting groove 15 using pipes.

[0093] Step 2: Adjust the position of the upper switch limit block 22 according to the length of the tube used in the rocket engine test system to be cleaned.

[0094] In step two, since the lengths of the tubes used in different rocket engine test systems to be cleaned may vary, the position of the upper switch limit block 22 can be adjusted (i.e., the distance between the upper switch limit block 22 and the lower switch limit block 21 can be adjusted) to accommodate different tube lengths. Figure 5 (the vertical height in the middle), thus it can effectively adapt to the different lengths of the tubes used in the rocket engine test system to be cleaned.

[0095] For example, when cleaning a long section of rocket engine test system tubing, if the position of the upper switch limit block 22 is not adjusted, the nozzle 14 may not clean the tubing completely during the cleaning process. Conversely, when cleaning a short section of rocket engine test system tubing, if the position of the upper switch limit block 22 is not adjusted, the nozzle 14 may protrude beyond the top of the tubing during the cleaning process. By adjusting the position of the upper switch limit block 22, the nozzle 14 can smoothly clean both the top and bottom of the rocket engine test system tubing without protruding beyond the top, thus ensuring the normal progress of the cleaning work.

[0096] Step 3: Close the first valve 28 and the second valve 29, and add cleaning agent to the cleaning agent container 27.

[0097] Step 4: Connect a nitrogen cylinder (not shown in the figure and known in the art) to the first pipe 25, open the first valve 28 and the second valve 29, and start the motor 13 at the same time.

[0098] In step four, the nitrogen cylinder can be connected to the end of the first pipe 25 furthest from the housing 1 (i.e. Figure 5 (Right end of the first pipe 25 in the middle).

[0099] In step four, since the first valve 28 is open and the first pipe 25 is located below the cleaning agent container 27, the cleaning agent in the cleaning agent container 27 will flow into the first pipe 25 by its own gravity. Because the nitrogen cylinder itself has internal pressure, the nitrogen will automatically enter the hollow lead screw 4 and the nozzle 14 under its own internal pressure, and then be sprayed out from the nozzle 14. When the cleaning agent enters the first pipe 25, the nitrogen will carry the cleaning agent into the hollow lead screw 4 and the nozzle 14, and then be sprayed out from the nozzle 14, thereby cleaning the inside of the pipe used in the rocket engine test system (in this embodiment, a rocket corrugated pipe).

[0100] In step four, motor 13 drives connecting shaft 12 to rotate via reducer 10, which in turn causes hollow lead screw 4 to rotate and move vertically, allowing the cleaning agent sprayed from nozzle 14 to thoroughly clean the inside of the rocket engine test system pipe without any blind spots. During the cleaning process, the airflow sprayed from nozzle 14 forms a perpendicular relationship with the inner wall of the rocket engine test system pipe, which has a shearing effect. Therefore, it thoroughly cleans the dirt-laden areas (i.e., dead corners) inside the rocket engine test system pipe, improving the cleaning quality.

[0101] In step four, since both the first limit switch 17 and the second limit switch 19 are electrically connected to the motor 13 and can adjust the forward and reverse rotation of the motor 13, when the hollow lead screw 4 is rising, the first pulley 18 on the first limit switch 17 will contact the upper switch limit block 22 as the hollow lead screw 4 rises. When the first pulley 18 contacts the upper switch limit block 22, the inclined surface on the upper switch limit block 22 will press the pressing end of the first limit switch 17. At this time, the first limit switch 17 will control the motor 13 to rotate in the reverse direction and cause the hollow lead screw 4 to descend. Similarly, when the hollow lead screw 4 descends to the point where the second pulley 20 contacts the inclined surface of the lower switch limit block 21, the inclined surface of the lower switch limit block 21 will press the pressing end of the second limit switch 19 and cause the hollow lead screw 4 to rise, thus forming a cyclical reciprocating motion of the hollow lead screw 4 rising and falling.

[0102] In step four, for example, when motor 13 is a DC motor, pressing the pressing end of the first limit switch 17 and the pressing end of the upper switch limit block 22 can adjust the direction of the current in motor 13 (which can also be regarded as changing the positive and negative poles of the power supply to motor 13), thereby realizing the control of the forward and reverse rotation of motor 13. When motor 13 is a pneumatic motor, a reversing valve (not shown in the figure) known in the art can be connected in parallel with motor 13. Pressing the pressing end of the first limit switch 17 and the pressing end of the upper switch limit block 22 can cause the reversing valve to reverse, thereby changing the direction of the compressed air in motor 13, thereby realizing the control of the forward and reverse rotation of motor 13. The above are all prior art known in the art, and will not be elaborated here.

[0103] It should be understood that the hollow screw 4 will also rise and fall during rotation, which will synchronously drive the nozzle 14 to rise and fall and rotate. Therefore, only one component (i.e., the hollow screw 4) is needed to simultaneously realize the rise and fall and rotation of the nozzle 14, thereby achieving thorough cleaning of the inside of the tube of the rocket engine test system without dead angles.

[0104] In step four, since the position of the upper switch limit block 22 has been adjusted in step two, the nozzle 14 will rise to the top of the tube inside the rocket engine test system and then fall, without extending beyond the top of the tube, and there will be no incomplete cleaning of the tube.

[0105] Furthermore, in step four, since nitrogen flows within the first pipe 25, according to Bernoulli's principle, the pressure within the first pipe 25 will decrease. This means that the cleaning agent in the cleaning agent container 27 will not only enter the first pipe 25 by gravity, but will also be drawn into the first pipe 25 by the reduced pressure, thus ensuring a smooth supply of cleaning agent.

[0106] Step 5: After the hollow lead screw 4 in Step 4 has completed at least one lifting cycle, disconnect the nitrogen cylinder connected to the first pipe 25, connect clean water to the first pipe 25, and close the first valve 28.

[0107] In step five, purified water can be supplied to the device using water purifiers and external water pumps (not shown in the figure and known in the art), which will not be described in detail here.

[0108] In step five, the clean water connected to the first pipe 25 will be sprayed onto the inner wall of the rocket engine test system pipe through the nozzle 14, thereby rinsing the cleaning agent on the inner wall of the rocket engine test system pipe in step four.

[0109] Step six: After the hollow lead screw 4 in step five has completed at least one lifting cycle, disconnect the clean water connected to the first pipe 25 and reconnect the nitrogen cylinder to the first pipe 25.

[0110] In step six, the nitrogen cylinder reconnected to the first pipe 25 will cause the nozzle 14 to spray nitrogen again, thereby drying the inner wall of the tube used in the rocket engine test system in step five.

[0111] In step six, after the hollow lead screw 4 has completed at least one lifting cycle, all electrical equipment on this device is disconnected and all valves are closed, thus completing the cleaning work of the pipes used in the rocket engine test system.

[0112] It should be understood that the above steps are only one method of using this device, and not the only method of using this device. In other words, any method of cleaning pipes using this device, especially the method of cleaning pipes used in rocket engine test systems, is included within the protection scope of this utility model.

[0113] It should be understood that the above-described embodiments or examples of this utility model can be combined with each other and have corresponding technical effects.

[0114] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic pipe cleaning device, characterized in that, Includes a housing (1), a hollow lead screw (4), a nozzle (14), a rotary joint (5), a telescopic hose (7), and a second pipe (26), wherein: The top of the housing (1) is provided with a pipe flange mounting groove (15) for installing the pipe to be cleaned. The hollow screw (4) is located inside the housing (1) and its top end passes through the bottom end of the pipe flange mounting groove (15). The hollow screw (4) is threadedly engaged with the housing (1). The nozzle (14) is connected to and communicates with the top end of the hollow screw (4). The rotary joint (5) is equipped with a drive mechanism that drives the hollow screw (4). The drive mechanism is located at the bottom of the hollow screw (4) and between the rotary joint (5) and the top inner wall of the housing (1). The rotary joint (5) is limited and slidably fitted on the inner wall of the housing (1) in a direction parallel to the hollow screw (4). The rotating end and the fixed end of the rotary joint (5) are respectively connected to and communicate with the bottom end of the hollow screw (4) and one end of the telescopic hose (7). The other end of the telescopic hose (7) is used to introduce nitrogen and clean water. The second pipe (26) is connected to and communicates with the telescopic hose (7), and one end of it away from the telescopic hose (7) is used to pass in cleaning agent; a first valve (28) is installed on the second pipe (26).

2. The automatic pipeline cleaning device according to claim 1, characterized in that, One side wall of the housing (1) is an open structure. The housing (1) is provided with a door (2). The door (2) is provided in accordance with the open structure of the housing (1) and is adapted to the open structure of the housing (1). One end of the door (2) is hinged to the housing (1), and the other end of the door (2) is detachably connected to the housing (1). A cleaning agent container (27) is installed on the outer side wall of the housing (1). The cleaning agent container (27) is a hollow structure with an open top. The cleaning agent container (27) is located directly above the telescopic hose (7). The end of the second pipe (26) away from the telescopic hose (7) is connected to and communicates with the bottom end of the cleaning agent container (27).

3. The automatic pipeline cleaning device according to claim 1, characterized in that, A mounting block (6) is installed on the outer wall of the rotary joint (5), and the drive mechanism is mounted on the mounting block (6). The drive mechanism is mounted on the rotary joint (5) through the mounting block (6). The drive mechanism includes a reducer (10) and a motor (13). The reducer (10) is located at the bottom of the hollow lead screw (4) and between the rotary joint (5) and the top inner wall of the housing (1). The output end of the reducer (10) is connected to a connecting shaft (12). The connecting shaft (12) is coaxially arranged with the hollow lead screw (4) and fixedly connected to the hollow lead screw (4). The motor (13) is mounted on the mounting block (6), and the output shaft of the motor (13) is in transmission cooperation with the input end of the reducer (10); A connecting block (11) is installed on the outer wall of the reducer (10). The end of the connecting block (11) away from the reducer (10) is connected to the mounting block (6). The reducer (10) is mounted on the mounting block (6) through the connecting block (11).

4. The automatic pipeline cleaning device according to claim 3, characterized in that, The hollow lead screw (4) is arranged in the vertical direction; The mounting block (6) is equipped with a limiting sliding block (8). The inner wall of the housing (1) is provided with a limiting sliding groove (9) in a direction parallel to the hollow screw (4). The limiting sliding block (8) is adapted to the limiting sliding groove (9) and slides inside the limiting sliding groove (9). The rotary joint (5) is limited and slides on the inner wall of the housing (1) through the limiting sliding block (8) and the limiting sliding groove (9). The reducer (10) is a worm gear reducer.

5. The automatic pipe cleaning device according to claim 3, characterized in that, The mounting block (6) is equipped with a first limit switch (17) and a second limit switch (19). The first limit switch (17) is located above the second limit switch (19). Both the first limit switch (17) and the second limit switch (19) are electrically connected to the motor (13). A lower switch limiting block (21) and an upper switch limiting block (22) are installed on the inner wall of the housing (1), and the upper switch limiting block (22) is located above the lower switch limiting block (21). The lower switch limiting block (21) is fixedly connected to the inner wall of the housing (1), and the upper switch limiting block (22) is adjustablely connected to the inner wall of the housing (1) in a direction parallel to the hollow lead screw (4). Both the lower switch limit block (21) and the upper switch limit block (22) are provided with inclined structures. The pressing end of the second limit switch (19) is correspondingly set with the inclined structure of the lower switch limit block (21) and is configured to be able to contact and cooperate with the inclined structure of the lower switch limit block (21). The pressing end of the first limit switch (17) is correspondingly set with the inclined structure of the upper switch limit block (22) and is configured to be able to contact and cooperate with the inclined structure of the upper switch limit block (22).

6. The automatic pipeline cleaning device according to claim 5, characterized in that, An adjustment through hole (23) is provided on the side wall of the housing (1) in a direction parallel to the hollow lead screw (4). The adjustment through hole (23) is correspondingly provided with the upper switch limit block (22). An adjustment bolt (24) is provided inside the adjustment through hole (23). The threaded rod of the adjustment bolt (24) is threadedly engaged with the upper switch limit block (22) and is configured to slide inside the adjustment through hole (23). The bolt head of the adjustment bolt (24) is located outside the housing (1) and is configured to abut against the outer side wall of the housing (1). The upper switch limit block (22) is adjustablely connected to the inner side wall of the housing (1) through the adjustment through hole (23) and the adjustment bolt (24).

7. The automatic pipeline cleaning device according to claim 5, characterized in that, The pressing end of the second limit switch (19) is rotatably mounted with a second pulley (20). The second pulley (20) is correspondingly set with the inclined structure of the lower switch limit block (21) and is configured to be able to contact and cooperate with the inclined structure of the lower switch limit block (21). The pressing end of the second limit switch (19) is correspondingly set with the inclined structure of the lower switch limit block (21) through the second pulley (20). The pressing end of the first limit switch (17) is rotatably mounted with a first pulley (18). The first pulley (18) is correspondingly set with the inclined structure of the upper switch limit block (22) and is configured to be able to contact and cooperate with the inclined structure of the upper switch limit block (22). The pressing end of the first limit switch (17) is correspondingly set with the inclined structure of the upper switch limit block (22) through the first pulley (18).

8. The automatic pipeline cleaning device according to claim 1, characterized in that, A discharge pipe (16) is installed on the housing (1). The discharge pipe (16) is inclined. The highest end of the inclined discharge pipe (16) is installed at the top of the housing (1) and communicates with the inside of the pipe flange mounting groove (15). The connection between the discharge pipe (16) and the inside of the pipe flange mounting groove (15) is located on one side of the hollow screw (4). The lowest end of the inclined discharge pipe (16) is located outside the housing (1).

9. The automatic pipeline cleaning device according to claim 1, characterized in that, The end of the telescopic hose (7) away from the rotary joint (5) is connected to a first pipe (25), and the end of the first pipe (25) away from the telescopic hose (7) is used to introduce nitrogen and clean water; the second pipe (26) is connected to and communicates with the first pipe (25), and the second pipe (26) is connected to the telescopic hose (7) through the first pipe (25); A second valve (29), a pressure reducing valve (30), and a pressure gauge (31) are installed on the first pipe (25). The second valve (29), the pressure reducing valve (30), and the pressure gauge (31) are all located at the end of the second pipe (26) away from the telescopic hose (7). The second valve (29) is located between the second pipe (26) and the pressure gauge (31). The pressure gauge (31) is located between the second valve (29) and the pressure reducing valve (30).

10. The automatic pipe cleaning device according to claim 1, characterized in that, The bottom of the housing (1) is equipped with several casters (3).

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