Mechanical cleaning of oil storage tanks

Abstract

The present application relates to oil storage tank cleaning equipment technical field, specifically disclose a kind of oil storage tank mechanical cleaning components, comprising: drive system, liquid inlet, installation pipe, water jet nozzle, installation pipe fluid downstream intercommunication pressure regulating pipe, pressure regulating pipe bottom end is connected to nozzle base via flange, water jet nozzle is rotatably mounted in base;Center shaft is arranged in the inner cavity of installation pipe, the top end of center shaft is connected to drive system, the bottom end is connected to water jet nozzle via transmission mechanism;Pressure regulating mechanism is arranged in the inner cavity of pressure regulating pipe, which contains opposite pressure regulating block and rotating ring with non-circular closed annular guide rail, pressure regulating block is matched with rail by guide assembly, rotating ring rotation can drive pressure regulating block radial reciprocating motion;The present application changes the cross-sectional area of flow passage dynamically through pure mechanical linkage, compensates the decay of jet flow kinetic energy at the middle swing angle of water jet nozzle, eliminates the weak cleaning area, and there are no electrical components to adapt to the explosion-proof requirements, and also can replace special-shaped rotating ring to adapt to multiple storage tanks, improve the thoroughness of cleaning and scene adaptability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil storage tank cleaning equipment, and particularly relates to a mechanical cleaning component for an oil storage tank. BACKGROUND

[0002] In the field of oil storage, crude oil mined from the earth is temporarily stored in large oil storage tanks. After long-term use, deposits such as oil sludge, wax and mechanical impurities are easily accumulated in the tank, not only reducing the effective volume of the tank, but also possibly blocking the oil pipeline, threatening the safety of oil storage and the service life of the storage tank structure, so cleaning operations need to be carried out regularly in accordance with the Oil Tank Cleaning Safety Technical Regulations. The existing mechanical cleaning machine for dome-shaped tanks is usually inserted into the tank from the tank top breather valve or light transmission hole, driven by compressed air to drive a pneumatic motor, and rotates the nozzle assembly through a gear transmission system, and supports manual adjustment of cleaning parameters. The cleaning liquid is sprayed from the nozzle after being pressurized by the cluster, forming a horizontal 360°, vertical 140° spiral coverage track, which can theoretically mix, dissolve and clean the residual oil on the tank bottom and tank wall, and achieve full cleaning.

[0003] However, in the actual cleaning process, the nozzle reciprocates within a 140° vertical range, and the distance between the nozzle and the tank wall and tank bottom changes significantly with the swing angle, resulting in uneven distribution of jet impact force: when the nozzle is near 0° (vertically downward) or 90° (horizontal), the jet impact force is strong and the cleaning effect is good; but when the nozzle swings to an intermediate angle such as 45° or 135°, the jet reaches the tank wall or tank bottom with the longest path and the kinetic energy decays severely, the impact force decreases significantly, and it is difficult to effectively remove the firmly adhered deposits; this phenomenon results in a clear weak zone in the cleaning track, especially at the edge of the tank bottom and the middle of the tank wall, which is prone to residual oil stains and becomes a key technical bottleneck that restricts the thoroughness and consistency of cleaning. SUMMARY

[0004] The present application aims to provide a mechanical cleaning component for an oil storage tank to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A mechanical cleaning component for an oil storage tank, comprising: a drive system, a liquid inlet, a mounting pipe and a water jet nozzle, the drive system is arranged at the top end of the mounting pipe, the liquid inlet is arranged at the side end of the mounting pipe, the fluid downstream of the mounting pipe is communicated with a pressure regulating pipe, the bottom end of the pressure regulating pipe is connected with a nozzle base through a flange, the lower end of the nozzle base is rotatably mounted with a water jet nozzle, a center shaft is arranged in the center of the mounting pipe inner cavity, the top end of the center shaft is connected with the drive system, the bottom end is connected with the water jet nozzle through a transmission mechanism, and a pressure regulating mechanism is arranged in the inner cavity of the pressure regulating pipe;

[0007] The pressure regulating mechanism comprises two oppositely arranged pressure regulating blocks and a rotating ring connected with the driving system, the rotating ring is provided with a non-circular closed annular guide track, the pressure regulating blocks are matched with the guide track through guide assemblies, and the rotating movement of the rotating ring can drive the pressure regulating blocks to move reciprocatingly in the radial direction.

[0008] Preferably, the rotating ring is in the shape of a regular quadrangular star, the tangent line at the inner wall of the most concave point is tangent to the inner cavity wall of the pressure regulating pipe, and the guide track is arranged on the side of the rotating ring connected with the pressure regulating block.

[0009] Preferably, the pressure regulating mechanism comprises two rotating rings, the two rotating rings are symmetrically arranged on the top surface and the bottom surface of the two pressure regulating blocks respectively, the guide assembly is a guide ball, the top surface and the bottom surface of the pressure regulating block are provided with ball sockets matched with the guide ball at the corresponding positions, the guide ball is arranged to roll between the track and the ball socket, and the centers of the guide balls on the top surface and the bottom surface are located on the same vertical axis.

[0010] Preferably, the total thickness of the two rotating rings and the two pressure regulating blocks in the axial direction is equal to the axial height of the inner cavity of the pressure regulating pipe.

[0011] Preferably, the opposite sides of the two pressure regulating blocks are symmetrically provided with drainage grooves in the shape of a half circular truncated cone, the top end radius of the drainage groove is greater than the bottom end radius, and when the distance between the two pressure regulating blocks is the smallest, the two drainage grooves are spliced to form a complete circular truncated cone flow channel.

[0012] Preferably, the pressure regulating mechanism further comprises a limiting assembly, the limiting assembly comprises two limiting blocks symmetrically arranged on the two sides of the two pressure regulating blocks, the opposite sides of the two limiting blocks are slidably matched with the inner wall of the pressure regulating pipe, the opposite sides of the two limiting blocks are flat and matched with the side walls of the pressure regulating blocks, a plurality of insertion holes are arranged on the two sides of the pressure regulating block, a limiting roller is rotatably arranged in the insertion hole, a guide groove matched with the limiting roller is arranged on the limiting block, and the extension direction of the guide groove is consistent with the movement direction of the pressure regulating block.

[0013] Preferably, the rotating ring is detachably connected with the central shaft through a connecting frame.

[0014] Compared with the prior art, the pressure regulating mechanism has the following beneficial effects:

[0015] The nozzle of the existing oil tank cleaning machine moves within a 140° vertical swing angle range, and the distance from the nozzle to the tank wall and the tank bottom changes with the swing angle, which causes the jet flow kinetic energy to be seriously attenuated at intermediate angles of 45° and 135°, and the stubborn deposits cannot be effectively stripped, forming a cleaning weak area. The present application sets a pressure regulating pipe and a pressure regulating mechanism downstream of the installation pipe fluid, uses a rotating ring with a non-circular closed ring-shaped guide rail to drive the relatively arranged pressure regulating blocks to reciprocate radially, when the water flow nozzle is at a remote intermediate angle, the rotating ring track drives the pressure regulating blocks to approach, reduces the flow passage cross-sectional area to increase the cleaning liquid pressure and flow rate, and compensates for the kinetic energy attenuation; when the water flow nozzle is at a close limit angle, the rotating ring track drives the pressure regulating blocks to move away, expands the flow passage cross-sectional area to avoid overshoot damage to the tank wall. This design does not rely on additional power, and pure mechanical linkage can achieve uniform impact force within the full swing angle range, effectively eliminating the cleaning weak area, and compared with the prior art, the thickness of the residual oil stains on the tank wall and the tank bottom can be reduced, and the cleaning thoroughness is improved.

[0016] Meanwhile, the present application uses pure mechanical structure throughout (rotating ring and pressure regulating block linkage, double rotating ring symmetrical arrangement, semicircular table-shaped drainage groove, limiting component, etc.), without any electrical elements, naturally meeting the explosion-proof requirements of petrochemical scenes. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the present application;

[0018] Figure 2 is a top view of the pressure regulating mechanism when the two pressure regulating blocks of the present application are at the maximum distance;

[0019] Figure 3 is an exploded view of the structure of the pressure regulating mechanism of the present application;

[0020] Figure 4 is an exploded view of the structure of the limiting component of the present application;

[0021] Figure 5 is a front view cross-sectional view when the two pressure regulating blocks of the present application are at the minimum distance;

[0022] Figure 6 is a side view cross-sectional view when the two pressure regulating blocks of the present application are at the minimum distance;

[0023] In the figure: 1, drive system; 2, liquid inlet; 3, installation pipe; 4, pressure regulating pipe; 5, nozzle base; 6, water flow nozzle; 7, center shaft; 8, rotating ring; 9, guide rail; 10, guide ball; 11, pressure regulating block; 12, drainage groove; 13, limiting roller; 14, limiting block; 15, guide groove; 16, connecting frame. DETAILED DESCRIPTION

[0024] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", and the like are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] As shown in the accompanying drawings Figure 1 to the accompanying Figure 6 drawings: Embodiment I:

[0027] The present application provides a kind of oil tank mechanical cleaning parts, including drive system 1, liquid inlet 2, installation pipe 3, water flow nozzle 6, pressure regulating pipe 4, nozzle base 5, center shaft 7 and pressure regulating mechanism;Wherein drive system 1 uses the blade type pneumatic motor known in the art, avoid the risk of electric spark, meet the requirement of petrochemical tank area explosion protection;Liquid inlet 2 is standard internal thread interface, adapts the output pipeline of high-pressure cleaning pump;Installation pipe 3 is stainless steel seamless pipe, ensure rigidity under high pressure;Water flow nozzle 6 is the cluster booster nozzle in prior art, has basic booster capacity.

[0028] Specific structure: the pressure regulating mechanism includes two oppositely arranged pressure regulating blocks 11, a rotating ring 8 and a guide assembly. The rotating ring 8 is in the shape of a regular four-pointed star, and the tangent line at the deepest point of the inner wall thereof is tangent to the inner wall of the pressure regulating pipe 4. A non-circular closed annular guide track 9 is formed on the side of the rotating ring 8 facing the pressure regulating blocks 11. The guide assembly is a guide ball 10. The top surface of the pressure regulating block 11 is provided with a ball socket adapted to the guide ball 10. The rotating ring 8 is detachably connected to the central shaft 7 through a connecting frame 16. The detachable connection mode includes, but is not limited to, a clamping groove plug-in connection and any other connection mode. The detachable connection mode is a common means for those skilled in the art, and thus will not be described herein. The top end of the central shaft 7 is connected to the output end of the driving system 1 through a spline connection. The bottom end of the central shaft 7 is connected to the water jet nozzle 6 through a bevel gear transmission mechanism commonly known in the art, so as to realize the linkage rotation of the rotating ring 8 and the water jet nozzle 6. The bottom end of the pressure regulating pipe 4 is sealingly connected to the nozzle base 5 through a standard flange. The flange sealing surface is provided with a metal winding gasket.

[0029] Assembly mode: after the driving system 1, the mounting pipe 3, the pressure regulating pipe 4 and the central shaft 7 are assembled together, the connecting frame 16 is fixedly arranged on the central shaft 7, and the rotating ring 8 is plugged into the connecting frame 16 through a clamping groove. It is ensured that the guide track 9 on the rotating ring 8 faces the water outlet end. The guide ball 10 is embedded in the ball socket on the top surface of the pressure regulating block 11. Then, the two pressure regulating blocks 11 are oppositely arranged below the rotating ring 8, so that the guide ball 10 is clamped into the guide track 9 of the rotating ring 8. At this time, the pressure regulating block 11 can freely roll along the guide track 9. Then, the flange at the bottom end of the pressure regulating pipe 4 is aligned with the flange of the nozzle base 5, and the bolt is inserted and fixed, so as to complete the overall assembly. It should be noted that during installation, if the two pressure regulating blocks 11 are at the maximum distance, attention should be paid to ensure that the water outlet of the water jet nozzle 6 is vertically downward or horizontally outward during installation. Here, the engagement of the bevel gear should be continuously adjusted. Then, the entire cleaning machine is inserted into the breather valve and fixed by a fixing clamp.

[0030] Working process: the liquid inlet 2 is connected to an external high-pressure cleaning pump, and compressed air is supplied to the driving system 1. At this time, the driving system 1 drives the central shaft 7 to rotate. The central shaft 7 drives the water jet nozzle 6 to rotate synchronously through a synchronous transmission bevel gear mechanism. The water jet nozzle 6 synchronously completes horizontal 360° rotation and vertical 140° oscillation. At the same time, the rotating ring 8 rotates synchronously with the central shaft 7, so as to ensure that the concave points of the regular four-pointed star-shaped track of the rotating ring 8 are always accurately corresponding to the oscillation angle of the water jet nozzle 6.

[0031] When the water jet nozzle 6 oscillates to the middle angle of 45° or 135°, which is the farthest distance from the tank wall, the concave points of the regular four-pointed star-shaped guide track 9 of the rotating ring 8 are just rotated to the position of the guide ball 10, so as to push the two pressure regulating blocks 11 to approach along the radial direction. The distance between the two pressure regulating blocks 11 is reduced, and the cross-sectional area of the flow passage is reduced. According to the principle of fluid mechanics, the reduction of the cross-sectional area of the flow passage can increase the flow velocity and pressure of the cleaning liquid, so as to compensate for the kinetic energy attenuation caused by the increase of the distance.

[0032] When the water flow nozzle 6 swings to 0° (vertically downward) or 90° (horizontally), the guide track 9 of the rotating ring 8 is turned to the position of the guide ball 10, which drives the guide ball 10 to move towards the inner wall of the pressure regulating pipe 4, the pressure regulating block 11 moves away in the radial direction, the distance is the largest, the flow passage cross-sectional area is the largest, the cleaning liquid pressure is reduced, and such a periodic cycle is realized by the synchronous swinging of the water flow nozzle 6, so that the impact force is uniform in the full swing angle range.

[0033] Working principle: The core innovation of this embodiment is the "positive four-star rotating ring 8 linkage". The synchronization transmission of the center shaft 7 and the water flow nozzle 6 is ensured through the bevel gear mechanism, so that the rotation of the rotating ring 8 is accurately synchronized with the swing angle of the water flow nozzle 6. The concave points of the positive four-star track can be accurately aligned with the intermediate angles of 45° and 135°, which are weak impact angles. The radial reciprocating motion of the pressure regulating block 11 dynamically adjusts the flow passage cross-sectional area, compensates for the decay of kinetic energy at a distance, and realizes self-adaptive pressure regulation through pure mechanical structure without electrical components, which is suitable for petrochemical explosion-proof scenes. Embodiment two:

[0034] This embodiment is basically the same as the previous embodiment, the difference is that the pressure regulating mechanism adopts symmetrical arrangement of double rotating rings 8, and the pressure regulating block 11 is additionally provided with a semicircular table-shaped drainage groove 12 to optimize the stability of the liquid flow; it is suitable for scenes where the cleaning liquid contains trace impurities such as oil sludge particles, reducing impurity deposition caused by sudden changes in the flow passage.

[0035] Specific structural difference: The pressure regulating mechanism includes two rotating rings 8, which are respectively and symmetrically arranged on the top surface and the bottom surface of the two pressure regulating blocks 11, and the guide tracks 9 of the two rotating rings 8 are mirror-symmetric; the guide assembly is still the guide ball 10, and the top surface and the bottom surface of the pressure regulating block 11 are both provided with a ball socket at the corresponding position. The centers of the guide balls 10 on the top surface and the bottom surface are located on the same vertical axis, which ensures that the pressure regulating block 11 is evenly stressed up and down. It is noted that the two rotating rings 8 are detachably connected with the center shaft 7 through the connecting frame 16 and rotate synchronously with the center shaft 7, and due to the synchronous transmission of the bevel gear, the concave points of the tracks of the two rotating rings 8 still accurately correspond to the 45° and 135° swing angles of the water flow nozzle 6.

[0036] The two pressure regulating blocks 11 are symmetrically provided with a semicircular table-shaped drainage groove 12 on the opposite side, and the top end radius of the drainage groove 12 is consistent with the radius of the inner tube of the mounting pipe 3. When the distance between the two pressure regulating blocks 11 is the smallest, the two drainage grooves 12 are spliced to form a complete circular table-shaped flow passage, reducing the liquid flow vortex.

[0037] The total thickness of the two rotating rings 8 and the two pressure regulating blocks 11 in the axial direction is equal to the axial height of the inner cavity of the pressure regulating pipe 4 (allowing a certain error space), which ensures that the pressure regulating mechanism does not axially move in the pressure regulating pipe 4, improves the structural stability under high pressure, and at the same time avoids the influence of axial movement on the corresponding accuracy of the swing angle of the rotating ring 8 and the water flow nozzle 6.

[0038] Assembly method difference: Install the upper swivel 8, pressure regulating block 11 and lower swivel 8 in the middle of the central shaft 7 from top to bottom in sequence. The upper and lower swivels 8 are connected with the central shaft 7 through the connecting frame 16. When installing, the special positioning tool is needed to calibrate the guide rail 9 of the two swivels 8 to ensure that the track concave points of the upper and lower swivels 8 are completely synchronized and correspond to the 45° and 135° swing angle of the nozzle, avoiding the track misalignment causing the pressure regulating block 11 to be stuck or the pressure regulating time to be offset.

[0039] The drainage groove 12 of the pressure regulating block 11 needs to be formed by five-axis milling during processing to ensure the coaxiality of the two drainage grooves 12. When assembling, the drainage grooves 12 of the two pressure regulating blocks 11 are placed opposite to each other, and the guide ball 10 cooperates with the guide rail 9 of the upper and lower swivels 8 to ensure that the drainage grooves 12 are not misaligned after splicing. At this time, the central shaft 7 needs to be rotated again to calibrate: whether the two pressure regulating blocks 11 start to approach exactly when the water flow nozzle 6 swings to 45°, to ensure that the flow passage after splicing the drainage grooves 12 can take effect accurately under long-distance working conditions.

[0040] Working process difference: When the cleaning liquid passes through the pressure regulating mechanism, the circular cone-shaped flow passage formed by the splicing of the drainage grooves 12 makes the liquid flow smoothly transition from a large diameter to a small diameter, and the flow rate uniformly increases along the axial direction of the flow passage, avoiding the local vortex caused by the "right-angle transition flow passage" in embodiment one. Even if the cleaning liquid contains oil and sludge particles, they can also pass through with smooth liquid flow and are not easy to deposit in the flow passage dead angle.

[0041] Working principle: Based on the "regular quadrangular star-shaped swivel 8" in embodiment one, this embodiment adds the "double swivel 8 + circular cone flow passage efficiency" innovation. The double swivel 8 is designed symmetrically to strengthen the movement synchronization of the pressure regulating block 11, and the circular cone flow passage reduces liquid flow loss and improves pressure transmission efficiency, which is suitable for cleaning of storage tanks with high impurity content, and takes into account the pressure regulating precision and anti-clogging ability. Embodiment three:

[0042] This embodiment is basically the same as the previous embodiment, the difference is that a limiting component is added to limit the non-radial degree of freedom of the pressure regulating block 11, which is suitable for harsh cleaning scenes with high pressure and high vibration, avoiding the pressure regulating failure caused by the vibration offset of the pressure regulating block 11.

[0043] Specific structural differences: the limiting assembly includes two limiting blocks 14 symmetrically arranged on both sides of the pressure regulating block 11, a limiting roller 13 and a guide groove 15, the limiting block 14 is a circular arc column, the side opposite to the sliding fit with the inner wall of the pressure regulating pipe 4 is a precisely processed plane, the opposite side is in fit with the side wall of the pressure regulating block 11, two insertion holes are arranged on both sides of the pressure regulating block 11 along the direction close to the central shaft 7, the limiting roller 13 is rotatably inserted into the insertion hole, the guide groove 15 is arranged on the limiting block 14 and matched with the limiting roller 13, the extension direction of the guide groove 15 is consistent with the radial movement direction of the pressure regulating block 11, the limiting assembly only limits the non-radial freedom degree of the pressure regulating block 11, does not affect the radial movement, and further does not interfere with the corresponding relationship between the rotating ring 8 and the nozzle swing angle.

[0044] Assembled in different ways: the connecting frame 16 is fixedly arranged on the central shaft 7, the first rotating ring 8 is inserted into the connecting frame 16 through the clamping groove, and the guide rail 9 on the connecting frame 16 is ensured to face the water outlet end, then the limiting roller 13 is inserted into the insertion hole of the pressure regulating block 11 after being smeared with lubricating grease, the roller is ensured to be freely rotatable, then the pressure regulating block 11 is arranged between the two limiting blocks 14, the limiting roller 13 is clamped into the guide groove 15 of the limiting block 14, at this time, the pressure regulating block 11 can only move radially along the guide groove 15, if the two pressure regulating blocks 11 are placed into the pressure regulating pipe 4 when the distance between them is the largest, one guide ball 10 is selected and placed at the position of the two symmetric convex angles of the guide rail 9, at this time, the ball socket of the two pressure regulating blocks 11 can be smoothly clamped into the outer periphery of the corresponding guide ball 10, then one guide ball 10 is placed into the ball socket on the bottom surface of each pressure regulating block 11, finally, the other rotating ring 8 is clamped onto the bottom surface of the pressure regulating block 11, the guide ball 10 is limited by the guide rail 9, when the water nozzle 6 is swung to 45°, the distance between the pressure regulating blocks 11 close to each other along the guide groove 15 is consistent with the designed value, and the limiting assembly will not cause jamming or deviation.

[0045] The working process is different: in the high-pressure cleaning operation, the pressure regulating block 11 of the second embodiment may be deviated circumferentially due to the counterforce vibration, so that the control error of the flow passage cross-sectional area is increased; in the present embodiment, the limiting roller 13 rolls along the guide groove 15, the plane of the limiting block 14 is in fit with the side wall of the pressure regulating block 11, the axial up-down and circumferential rotation freedom degrees of the pressure regulating block 11 are strictly limited, and only the radial movement space is reserved, so that the deviation of the pressure regulating block 11 is very small even in the continuous vibration working condition.

[0046] Working principle: based on the "double rotating ring 8+ drainage groove 12" of embodiment two, the embodiment adds the "mechanical limiting stability" innovation, through the cooperation of the limiting block 14 and the limiting roller 13, the movement degree of freedom of the pressure regulating block 11 is limited from "three-dimensional" to "one-dimensional radial", the vibration interference brought by the high-pressure injection reaction force is offset; the rolling cooperation of the guide groove 15 and the roller reduces the movement resistance, ensures that the pressure regulating block 11 responds quickly, is suitable for high-strength cleaning of large storage tanks, and gives consideration to stability and dynamic response.

[0047] The foregoing merely describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. An oil tank mechanical cleaning component, characterized by, The utility model relates to a kind of water flow nozzle, including: drive system (1), liquid inlet (2), installation pipe (3) and water flow nozzle (6), the drive system (1) is set to installation pipe (3) top, the liquid inlet (2) is set to installation pipe (3) side end, the fluid downstream communication of installation pipe (3) has pressure regulating pipe (4), the bottom end of pressure regulating pipe (4) is connected with nozzle pedestal (5) by flange, the lower end of nozzle pedestal (5) is rotatably installed with water flow nozzle (6), the center of installation pipe (3) inner chamber is provided with center shaft (7), the top end of center shaft (7) is connected with drive system (1), and the bottom end is connected with water flow nozzle (6) by transmission mechanism, and the inner chamber of pressure regulating pipe (4) is provided with pressure regulating mechanism; The pressure regulating mechanism includes two oppositely arranged pressure regulating blocks (11) and a swivel ring (8) connected with the drive system (1), the swivel ring (8) is provided with a non-circular closed ring-shaped guide track (9), the pressure regulating blocks (11) are matched with the guide track (9) through a guide assembly, so that the rotational movement of the swivel ring (8) can drive the pressure regulating blocks (11) to reciprocate radially; The contour of the swivel ring (8) is a regular quadrangular star, the tangent line at the deepest point of the inner wall of the swivel ring (8) is tangent to the inner wall of the pressure regulating pipe (4), and the guide track (9) is formed on the side of the swivel ring (8) that is in contact with the pressure regulating blocks (11); The pressure regulating mechanism includes two swivel rings (8), and the two swivel rings (8) are symmetrically arranged on the top surface and the bottom surface of the two pressure regulating blocks (11), respectively, the guide assembly is a guide ball (10), the top surface and the bottom surface of the pressure regulating blocks (11) are provided with ball sockets matched with the guide ball (10) at corresponding positions, and the guide ball (10) is arranged between the guide track and the ball socket in a rolling manner, and the centers of the guide balls (10) on the top surface and the bottom surface are located on the same vertical axis; The total thickness of the two swivel rings (8) and the two pressure regulating blocks (11) in the axial direction is equal to the axial height of the inner chamber of the pressure regulating pipe (4); The opposite sides of the two pressure regulating blocks (11) are symmetrically provided with drainage grooves (12) in the shape of a semicircular truncated cone, the top radius of the drainage grooves (12) is greater than the bottom radius, and when the distance between the two pressure regulating blocks (11) is the smallest, the two drainage grooves (12) are connected to form a complete truncated-cone-shaped flow channel; When the water flow nozzle (6) swings to an intermediate angle between 45° and 135° and is farthest from the tank wall, the concave points of the regular quadrangular star-shaped guide track (9) of the swivel ring (8) are just rotated to the positions of the guide balls (10), the two pressure regulating blocks (11) are pushed to move radially, the distance between the two pressure regulating blocks (11) is reduced, and the cross-sectional area of the flow channel is reduced. ​ 2. The tank mechanical cleaning component of claim 1, wherein: The pressure regulating mechanism further comprises a limiting component, the limiting component comprises two limiting blocks (14) symmetrically arranged on both sides of the two pressure regulating blocks (11), the opposite sides of the two limiting blocks (14) are in sliding fit with the inner wall of the pressure regulating pipe (4), and the opposite sides are planes and are in fit with the side walls of the pressure regulating blocks (11); a plurality of insertion holes are arranged on both sides of the pressure regulating block (11), a limiting roller (13) is rotatably arranged in the insertion hole, a guide groove (15) matched with the limiting roller (13) is arranged on the limiting block (14), and the extension direction of the guide groove (15) is consistent with the movement direction of the pressure regulating block (11).

3. The tank mechanical cleaning component of claim 1, wherein: The rotating ring (8) is detachably connected with the central shaft (7) through the connecting frame (16).

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