A vehicle-mounted tank truck tank inner wall cleaning system

Abstract

The application discloses a kind of vehicle-mounted tank truck tank inner wall cleaning systems, for the low efficiency of artificial cleaning, high cost in the prior art, and the problems such as the limited cleaning range of existing automatic cleaning device structure, the application proposes an improved scheme, the system includes liquid storage barrel, water pump, pressure relief valve, energy accumulator, switching valve, pressure indicator and be installed in the upper part of tank inner wall nozzle assembly, the nozzle on nozzle assembly is rotated around horizontal axis under the action of water pressure, then rotates around vertical axis after the transmission of worm gear device, realize the cleaning of all surfaces in tank body, when nozzle downward, stop injection, both reduce invalid injection, and water hammer effect is generated in water pipe, pressure indicator can judge whether nozzle assembly is injected in rotation, damping regulator is used to adjust the rotation speed of nozzle, the scheme is pure mechanical structure, with simple, reliable, high efficiency characteristics, suitable for equipping on various specifications of oil tank truck.

Description

Technical Field

[0001] This patent belongs to the field of mechanical engineering and industrial equipment, and more specifically, relates to a vehicle-mounted oil tanker inner wall cleaning system. Background Technology

[0002] Tanker trucks are crucial for transporting industrial oils and other liquids, and the cleanliness of their inner walls significantly impacts the quality of the oil. Previously, tanker truck cleaning relied heavily on manual labor, but this method was inefficient, posed significant safety hazards, and had limited cleaning area. Furthermore, the enclosed space of the tank meant that workers operating inside for extended periods risked injury from high-pressure water jets, and the high temperatures and harmful gases inside posed health risks. Currently, tanker trucks typically have baffles inside, dividing the internal space into several compartments, increasing the difficulty and cost of cleaning. Modern tanker truck interior cleaning involves inserting nozzles into the tank for cleaning, eliminating the need for personnel to enter the interior. For example, Chinese invention patent CN114273355A discloses "an automated cleaning device for the inner wall of an oil tanker". Its nozzle is installed at the boom, which requires high rigidity of the boom and high sealing of the motor. It can only be installed at a fixed cleaning station, and the vehicle needs to be driven to the cleaning station to complete the cleaning operation. It cannot be installed with the vehicle. Moreover, this technology often fails to meet the cleaning requirements for tanks with internal baffles. Summary of the Invention

[0003] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a vehicle-mounted tank cleaning system for the inner walls of oil tankers. This system is equipped with a hydraulic system and a rotary spray device, is installed on the vehicle, and is unaffected by the baffles inside the tank. It can effectively clean the inner walls of all compartments within the tank. If a nozzle fails to rotate, the problem can be easily identified via a pressure indicator on the outside of the tank. Furthermore, its use and maintenance are very simple.

[0004] To achieve this technical objective, the technical solution adopted by this invention is as follows:

[0005] A vehicle-mounted tank cleaning system for the inner wall of an oil tanker includes a hydraulic spraying system comprising a storage tank, a water pump, a pressure relief valve, an accumulator, a switching valve, a pressure indicator, and a nozzle assembly. The nozzle assemblies are installed at the top of the tank's inner cavity, with the number of nozzle assemblies matching the number of compartments within the tank. Each nozzle assembly's inlet pipe is connected to a different outlet of the switching valve via a water pipe. The inlet of the switching valve is connected to the water pump outlet via a water pipe, with the number of outlets matching the number of nozzle assemblies. Each operation of the switching valve changes the position of its internal valve core, ensuring that its inlet connects to only one outlet, thus achieving compartmentalized cleaning. The storage tank, water pump, pressure relief valve, accumulator, and switching valve are installed at a suitable location on the outside of the tank body, and these components are connected by water pipes. A pressure indicator is installed on the water pipe near the inlet of the switching valve to monitor pressure fluctuations in the inlet water pipe; these pressure fluctuations are reflected in the pressure indicator. The water pump can be driven by an electric motor or by the vehicle's engine. The pressure relief valve provides overpressure protection, and the accumulator filters out fluctuations in the water pump's output pressure.

[0006] The nozzle assembly includes a nozzle assembly mounting cover, a nozzle assembly inlet pipe, an inlet tee pipe, an inlet valve, a tee pipe bearing, a damping regulator, a rotating water jacket, a worm gear assembly, and a nozzle.

[0007] The inlet tee consists of a tee inlet, a tee outlet, and a tee bottom cover. Both the tee inlet and outlet are hollow pipes with their axes perpendicular to each other but not intersecting. Their internal spaces are interconnected. The tee inlet is rotatably mounted at the end of the nozzle assembly's inlet pipe via a tee bearing. The lower end of the tee inlet is sealed by a fixed tee bottom cover. The tee outlet has a symmetrical structure on both sides, and radial water outlet grooves are opened on the pipe wall at the end of each outlet.

[0008] The inlet of the water inlet tee is rotatably mounted on the water inlet pipe of the nozzle assembly via a tee bearing. The upper end of the tee bearing is equipped with a bearing baffle fixed on the water inlet pipe of the nozzle assembly to prevent water from splashing onto the tee bearing. The lower end of the tee bearing is equipped with a bearing sealing ring fixed on the inner wall of the inlet of the water inlet tee to prevent water from entering the tee bearing under pressure.

[0009] The inlet valve includes an inlet valve plate, a spring, an inlet valve seat, a guide pin, and a worm gear shaft. The inlet valve is fixed to the end of the nozzle assembly's inlet pipe via the upper port of the inlet valve seat. The guide pin is fixed to the inlet valve seat, and the spring is fitted onto the guide pin, positioned between the inlet valve plate and the inlet valve seat. When there is no pressure in the inlet pipe, the inlet valve plate is pressed against the inlet valve seat by the spring, and the inlet valve is in the closed state, isolating the space between the inlet pipe and the inlet tee pipe to prevent gas or liquid from leaking out of the tank. When there is pressure in the nozzle assembly's inlet pipe, the inlet valve plate moves downward along the guide pin under the pressure, overcoming the spring force, and the inlet valve opens, allowing the water in the nozzle assembly's inlet pipe to flow into the inlet tee pipe.

[0010] The worm gear assembly includes a worm and a worm wheel. The worm wheel is fixed on the worm wheel shaft of the inlet valve. When the system is working, the worm wheel always remains fixed and does not rotate. Two rotating water sleeves are fixed at both ends of the worm shaft. The worm shaft and the rotating water sleeves rotate coaxially together. The worm's axial position is limited by two baffles on the bottom cover of the tee pipe. Since the worm wheel is fixed and does not rotate, when the worm rotates, it also revolves around the axis of the worm wheel, driving the entire inlet tee pipe and the rotating water sleeves to rotate around the worm wheel shaft.

[0011] The rotating water jacket has a U-shaped cup structure. Its inner cylindrical surface fits onto the outer cylindrical surface at the outlet of the tee pipe, and it is fixed to the worm shaft through the central hole at its bottom. The rotating water jacket can rotate around its own axis together with the worm shaft. At least two radial through holes are machined on the rotating water jacket at the position corresponding to the water outlet groove. A nozzle is fixed on the outside of each through hole. The water in the inlet tee pipe can be sprayed outward from the nozzle through the water outlet groove.

[0012] The inner bore axis of the nozzle is offset from the axis of the rotating water jacket by a certain distance, and this offset distance is as close as possible to the inner diameter of the rotating water jacket, so as to generate the largest possible rotational torque to make the rotating water jacket rotate.

[0013] The two nozzles on the rotating water jacket are arranged in a centrally symmetrical manner in the cross section of the rotating water jacket axis, so that the two nozzles generate rotational torque in the same direction when spraying.

[0014] The water outlet groove at the outlet of the tee pipe is unevenly arranged on the circumference, with a long section in the lower half that is closed. When the nozzle of the rotating water jacket turns to this point, the nozzle stops spraying, which not only solves the problem of waste when spraying downwards, but also achieves intermittent spraying. This creates a water hammer effect inside the pipe, and the pressure fluctuation in the pipe can be observed through the pressure indicator, which can reflect whether the nozzle assembly is working properly.

[0015] The damping adjuster includes an adjusting screw, a rubber block, and a locking nut. The adjusting screw is screwed into the threaded hole of the nozzle assembly mounting cover, the locking nut is screwed onto the upper part of the adjusting screw, and the rubber block is fixed to the lower end of the adjusting screw. The bottom of the rubber block presses against the upper end face of the tee pipe inlet. Rotating the adjusting screw can adjust the frictional damping force between the rubber block and the inlet tee pipe, thereby adjusting the rotation speed of the inlet tee pipe.

[0016] Compared with existing technologies, the present invention has the following advantages:

[0017] By simply operating the switching valve, all compartments inside the tank can be cleaned individually in turn, leaving no blind spots;

[0018] By making full use of the water hammer effect generated by intermittent spraying, the pressure fluctuation on the pressure indicator can be used to determine whether the nozzle assembly is rotating while spraying and cleaning. If no pressure fluctuation is displayed on the pressure indicator, it means that the nozzle assembly is not rotating and should be repaired in time. There is no need to use other methods to check whether the system is working properly.

[0019] It adopts a mechanical and hydraulic transmission structure, which is simple, reliable, low-cost, and very convenient to use and maintain. It is suitable for installation on every tank truck and can complete cleaning operations at any time as needed. Attached Figure Description

[0020] It should be noted that, provided there are no contradictions, the various embodiments involved in this invention and the features contained therein can be combined with each other.

[0021] In the description of this invention, it should be clearly understood that terms such as "upper part," "lower part," and "external part" are used only to describe the orientation or positional relationship shown in the accompanying drawings, and are intended to simplify the expression and facilitate understanding. These terms do not mean that the devices or components involved must be constructed or installed in a specific orientation, and therefore should not be regarded as any limitation on this invention.

[0022] In the description of this invention, it should be noted that, unless expressly stated or limited to the contrary, the terms "installation," "connection," "joining," "engagement," "support," etc., should be understood to have broad meanings. These terms can cover various connection methods, including but not limited to fixed connections, detachable connections, and integral connections; they can be mechanical connections or chemical connections; they can refer to direct connections between two components or indirect connections achieved through intermediate components, and they can also refer to the internal interconnection of two components. Those skilled in the art will be able to understand the specific meaning of these terms in this invention according to the specific context.

[0023] To make the specific embodiments of the present invention clearer and easier to understand, the accompanying drawings involved in the implementation process will be briefly described below. These drawings illustrate some embodiments of the present invention, and those skilled in the art can derive other related drawings based on these drawings without creative effort:

[0024] Figure 1 This is a schematic diagram of the overall installation of a vehicle-mounted oil tanker inner wall cleaning system, provided as an embodiment of the present invention.

[0025] Figure 2 Provided for embodiments of the present invention Figure 1 A schematic diagram of the central nozzle assembly.

[0026] Figure 3 Provided for embodiments of the present invention Figure 2 Sectional view at point A in the middle.

[0027] Figure 4 Provided for embodiments of the present invention Figure 2 Schematic diagram of the external structure of the rotating water jacket.

[0028] Figure 5 Provided for embodiments of the present invention Figure 2 A schematic diagram of the inlet valve in the open state.

[0029] Figure 6 Provided for embodiments of the present invention Figure 2 A schematic diagram of the structure with the inlet valve closed.

[0030] Figure 7 Provided for embodiments of the present invention Figure 2 A schematic diagram of the water inlet tee pipe structure without the bottom cover.

[0031] Figure 8 Provided for embodiments of the present invention Figure 2 Schematic diagram of the bottom cover structure of the tee pipe.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Storage tank; 2. Water pump; 3. Pressure relief valve; 4. Accumulator; 5. Switching valve; 6. Pressure indicator; 7. Nozzle assembly; 8. Tank body; 9. Nozzle assembly inlet pipe; 10. Nozzle assembly mounting cover; 11. Damping regulator; 12. T-pipe inlet; 13. Bearing baffle cover; 14. T-pipe bearing; 15. Bearing seal ring; 16. Rotating water jacket; 17. Inlet valve; 18. Nozzle; 19. Worm shaft; 20. Worm; 21. Worm wheel; 22. T-pipe bottom cover; 23. T-pipe outlet; 24. Water outlet trough; 25. Baffle plate; 171. Inlet valve plate; 172. Spring; 173. Inlet valve seat; 174. Worm wheel shaft; 175. Guide pin. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments are provided for illustrative purposes and are not intended to limit the scope of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0035] This invention provides a vehicle-mounted oil tanker inner wall cleaning system. The system utilizes the power of the high-pressure water flow to drive the nozzles in a compound motion, achieving full coverage of the inner wall of the oil tanker and cleaning without any blind spots.

[0036] See Figure 1 The hydraulic circuit of the cleaning system mainly includes a storage tank 1, a water pump 2, a pressure relief valve 3, an accumulator 4, a switching valve 5, and a pressure indicator 6. The storage tank 1 stores the cleaning fluid (such as water or cleaning agent). The inlet of the water pump 2 is connected to the storage tank 1 via a water pipe, and its outlet is sequentially connected to the pressure relief valve 3 and the accumulator 4. The pressure relief valve 3 is used to set and stabilize the system's working pressure to prevent system overload. The accumulator 4 absorbs the pressure energy generated by the water pump 2 to maintain stable water pressure. The inlet of the switching valve 5 is connected to the outlet of the accumulator 4. The switching valve 5 has multiple outlets, the specific number being the same as the actual number of tank compartments; in this embodiment, there are four outlets. Each outlet is connected via an independent water pipe to a nozzle assembly 7 installed on the top of different compartments of the tank truck. By operating the switching valve 5, its inlet can be sequentially connected to different outlets, thereby achieving alternating cleaning of different compartments. The pressure indicator 6 is installed on the water pipe near the inlet of the switching valve 5 to monitor the system pressure in real time. The nozzle assembly 7 is fixedly installed at the opening in the middle of the top of the tanker body 8 via the nozzle assembly mounting cover 10.

[0037] See Figures 2 to 8 The nozzle assembly 7 is the core component for achieving automatic cleaning in this invention, and its specific structure is as follows:

[0038] The upper end of the nozzle assembly inlet pipe 9 is connected to one outlet of the switching valve 5 via a water pipe, and the lower end extends into the nozzle assembly 7. The nozzle assembly mounting cover 10 is fixed to the mounting port on the top of the tank 8 by bolts to support the entire nozzle assembly 7.

[0039] The damping adjuster 11 is mounted on the nozzle assembly mounting cover 10 and mainly includes an adjusting screw, a rubber block, and a locking nut. The adjusting screw is screwed into the threaded hole of the mounting cover 10, and the locking nut is used to lock the position of the adjusting screw. The rubber block is fixed to the lower end of the adjusting screw, and its bottom presses against the upper end face of the tee pipe inlet 12. By turning the adjusting screw, the pressure of the rubber block on the tee pipe inlet 12 can be changed, thereby adjusting the frictional damping force it experiences during rotation, and ultimately controlling the horizontal rotation speed of the nozzle assembly.

[0040] The three-way pipe inlet 12 is rotatably mounted at the end of the nozzle assembly water inlet pipe 9 via the three-way pipe bearing 14. The upper end of the three-way pipe bearing 14 is equipped with a bearing baffle 13 to prevent external liquid from splashing into the bearing. The lower end is equipped with a bearing sealing ring 15, installed on the inner wall of the three-way pipe inlet 12, to prevent high-pressure water from entering the bearing chamber and ensure smooth bearing rotation.

[0041] The inlet valve 17 is fixed to the end of the nozzle assembly inlet pipe 9 and inside the tee inlet 12. It consists of an inlet valve plate 171, a spring 172, an inlet valve seat 173, a guide pin 175, and a worm gear shaft 174. The upper end of the inlet valve seat 173 is fixed to the end of the nozzle assembly inlet pipe 9. The guide pin 175 is fixed to the inlet valve seat 173. The spring 172 is sleeved on the guide pin 175 and positioned between the inlet valve plate 171 and the inlet valve seat 173. When there is no water pressure or insufficient water pressure in the inlet pipe 9, the spring 172 presses the inlet valve plate 171 tightly against the inlet valve seat 173, closing the valve (e.g., when there is no water pressure or insufficient water pressure in the inlet pipe 9). Figure 6 (As shown), it effectively isolates the inside and outside of the tank, preventing oil vapor from escaping or external contaminants from entering. When the water pump starts, the water pressure in the inlet pipe 9 rises to a level sufficient to overcome the preload of the spring 172, and the water pressure pushes the inlet valve plate 171 downward along the guide pin 175, opening the valve (as shown). Figure 5 As shown), the cleaning fluid flows into the cavity of the water inlet tee pipe, which consists of the tee pipe inlet 12, the tee pipe outlet 23, and the tee pipe bottom cover 22.

[0042] The worm gear assembly consists of a worm wheel 21 and a worm 20. The worm wheel 21 is fixedly connected to the worm wheel shaft 174 at the lower end of the inlet valve seat 173, thus remaining stationary throughout the operation. The worm 20 meshes with the worm wheel 21, and its two ends are supported by bearings, allowing it to rotate freely. A rotating water jacket 16 is fixed to each end of the worm shaft 19. The tee pipe bottom cover 22 is fixed to the lower end of the tee pipe inlet 12 with screws. It has two baffles 25 inside to limit the axial position of the worm 20 and to mount the bearings at both ends of the worm shaft, allowing the worm to rotate freely. The worm 20 meshes with the fixed worm wheel 21. When the worm 20 rotates under the reaction force of the nozzle, it also undergoes planetary revolution around the axis of the worm wheel 21 (i.e., the axis of the worm wheel shaft 174). This revolution causes the entire inlet tee pipe (including the tee pipe inlet 12 and outlet 23) and the worm gear 20 bearing seat (i.e. baffle 25) and rotating water jacket 16 fixed on it to rotate horizontally around the worm gear shaft 174.

[0043] The rotating water jacket 16 is fixed to the worm shaft 19 by means of interference fit or key connection in its inner hole, and can rotate together with the worm shaft 19. The rotating water jacket 16 is sleeved on the outer cylindrical surface of the tee pipe outlet 23 and can rotate freely relative to it. The pipe wall of the tee pipe outlet 23 has radial water outlet grooves 24 (e.g., Figure 7 (As shown). The rotating water jacket 16 has two radial through holes machined at positions corresponding to the water outlet 24. A nozzle 18 is installed at the outer end of each through hole. The axis of the inner hole of the nozzle 18 is perpendicular to the axis of the rotating water jacket 16, but they do not intersect, resulting in an eccentricity. Figure 3 and 4 As shown, on the cross-section of the rotating water jacket axis, the two sets of through holes and nozzles are centrally symmetrical. The reaction force generated by the jet will form a torque that drives the rotating water jacket 16 to rotate around its own axis (i.e., the axis of the worm shaft 19). This torque drives the rotating water jacket 16, along with the worm shaft 19 and the worm 20, to rotate together, achieving the effect of the nozzle 18 rotating and jetting in the vertical plane. To maximize the rotational torque during jetting, in this embodiment, the offset distance between the nozzle inner hole axis and the rotating water jacket axis is close to the inner diameter of the rotating water jacket. In engineering, the offset distance can be appropriately adjusted according to the water pressure and the orifice size.

[0044] As the worm rotates, the worm wheel, being fixed, also revolves around it. This causes the nozzle 18 to simultaneously rotate (vertically) and revolve (horizontally). The superposition of these two motions ensures the jet stream covers the entire upper surface, side surfaces, and part of the lower surface of the inner wall of each compartment within the tank, achieving thorough cleaning. After cleaning one compartment, the switching valve is turned to begin cleaning the next compartment.

[0045] like Figure 3 and 7As shown, the water outlet 24 on the three-way pipe outlet 23 has a relatively long closed area in the lower half of its circumference. When the through hole on the rotating water jacket 16 rotates to be opposite to this closed area, the water flow is cut off, the nozzle 18 stops spraying, and the nozzle spray angle corresponding to the closed area covers the bottom of the tank. The water flowing down the inner wall of the tank can be effectively rinsed without spraying. When the through hole rotates to be opposite to the water outlet 24, spraying resumes. This intermittent spraying saves cleaning fluid on the one hand, and generates a significant water hammer effect pressure fluctuation in the pipeline on the other. This pressure fluctuation can be clearly displayed by the pressure indicator 6. The operator can intuitively judge whether the nozzle assembly 7 is rotating normally by observing the periodic fluctuation of the pressure value.

[0046] The frequency of periodic fluctuations of the pressure indicator is generally suitable between 1 and 2 Hz. If it is too high or too low, it can be adjusted by the damping regulator.

[0047] When cleaning the inner walls of an oil tanker, the cleaning agent is usually poured into the storage tank first. After cleaning all the inner walls of the compartments, clean water is poured into the storage tank and each compartment is cleaned again.

[0048] This invention, through a clever purely mechanical structure, converts the pressure energy and kinetic energy of the fluid into mechanical energy that drives the nozzle to perform compound motion, achieving efficient, reliable, and energy-saving automated cleaning. It has high practical value and promising prospects for widespread application.

Claims

1. A vehicle-mounted tank cleaning system for the inner wall of an oil tanker, comprising a hydraulic spraying system consisting of a storage tank, a water pump, a pressure relief valve, an accumulator, a switching valve, a pressure indicator, and a nozzle assembly, characterized in that: The nozzle assembly is installed at the top of the tanker's internal cavity. The number of nozzle assemblies is the same as the number of compartments inside the tank. The water inlet pipe of each nozzle assembly is connected to different outlets of the switching valve through water pipes. The inlet of the switching valve is connected to the outlet of the water pump through water pipes. The number of outlets of the switching valve is the same as the number of nozzle assemblies. Each time the switching valve is operated, the position of its internal valve core is switched so that its inlet can only be connected to one of the outlets. The storage tank, water pump, pressure relief valve, accumulator, and switching valve are installed at a location outside the tank on the vehicle, and these components are connected by water pipes. The pressure indicator is installed on the water pipe near the inlet of the switching valve, and pressure fluctuations in the inlet water pipe can be reflected by the pressure indicator. The nozzle assembly includes a nozzle assembly mounting cover, a nozzle assembly water inlet pipe, a water inlet tee pipe, a water inlet valve, a tee pipe bearing, a damping regulator, a rotating water jacket, a worm gear device, and a nozzle. The tee pipe inlet is rotatably mounted on the nozzle assembly water inlet pipe via the tee pipe bearing. The upper part of the tee pipe bearing is provided with a bearing baffle fixed on the nozzle assembly water inlet pipe to prevent water from splashing onto the tee pipe bearing. The lower part of the tee pipe bearing is provided with a bearing sealing ring fixed on the inner wall of the tee pipe inlet to prevent water from entering the tee pipe bearing under pressure. The worm gear device includes a worm and a worm wheel. The worm wheel is fixed on the worm wheel shaft of the inlet valve. When the system is working, the worm wheel always remains fixed and does not rotate. Two rotating water sleeves are fixed at both ends of the worm shaft. The worm shaft and the rotating water sleeves rotate coaxially together. The worm's axial position is limited by two baffles on the bottom cover of the tee pipe. Since the worm wheel is fixed and does not rotate, when the worm rotates, it also revolves around the axis of the worm wheel, and drives the entire inlet tee pipe and the rotating water sleeves to rotate around the worm wheel shaft together. The water outlet groove at the outlet of the three-way pipe is unevenly arranged on the circumference, and a long section in the lower half is closed. When the nozzle of the rotating water jacket is turned to this point, the nozzle stops spraying. This not only solves the problem of waste when spraying downwards, but also realizes intermittent spraying. A water hammer effect will be formed inside the pipe. The pressure fluctuation in the pipe can be observed through the pressure indicator, which can reflect whether the nozzle assembly is working properly. The damping adjuster includes an adjusting screw, a rubber block, and a locking nut. The adjusting screw is screwed into the threaded hole of the nozzle assembly mounting cover, the locking nut is screwed onto the upper part of the adjusting screw, the rubber block is fixed to the lower end of the adjusting screw, and the bottom of the rubber block presses against the upper end face of the tee pipe inlet. Rotating the adjusting screw can adjust the frictional damping force between the rubber block and the water inlet tee pipe, thereby adjusting the rotation speed of the water inlet tee pipe.

2. The vehicle-mounted tanker inner wall cleaning system according to claim 1, characterized in that: The water inlet tee consists of a tee inlet, a tee outlet, and a tee bottom cover. Both the tee inlet and the tee outlet are hollow pipe structures, with their axes perpendicular to each other but not intersecting. Their internal spaces are interconnected. The tee inlet is rotatably installed at the end of the nozzle assembly's water inlet pipe via a tee bearing. The lower end of the tee inlet is sealed by a fixed tee bottom cover. The tee outlet has a symmetrical structure on both sides, and radial water outlet grooves are opened on the pipe wall at the end of each outlet.

3. The vehicle-mounted tanker inner wall cleaning system according to claim 1, characterized in that: The water inlet valve includes a water inlet valve plate, a spring, a water inlet valve seat, a guide pin, and a worm gear shaft. The water inlet valve is fixed to the end of the water inlet pipe of the nozzle assembly through the upper port of the water inlet valve seat. The guide pin is fixed on the water inlet valve seat, and the spring is fitted on the guide pin and placed between the water inlet valve plate and the water inlet valve seat. When there is no pressure in the water inlet pipe, the water inlet valve plate is pressed against the water inlet valve seat under the action of the spring, and the water inlet valve is in the closed state, isolating the space between the water inlet pipe and the water inlet tee pipe to prevent gas or liquid from leaking out of the tank. When there is pressure in the water inlet pipe of the nozzle assembly, the water inlet valve plate moves downward along the guide pin under the action of the pressure, overcoming the force of the spring, and the water inlet valve opens, allowing the water in the water inlet pipe of the nozzle assembly to flow into the water inlet tee pipe.

4. The vehicle-mounted tanker inner wall cleaning system according to claim 1, characterized in that: The rotating water jacket is fitted onto the outer cylindrical surface at the outlet of the tee pipe through its inner cylindrical surface, and is fixed to the worm shaft through the central hole at its bottom. The rotating water jacket can rotate around its own axis together with the worm shaft. At least two radial through holes are machined on the rotating water jacket at the position corresponding to the water outlet groove. A nozzle is fixed on the outside of each through hole, and the water in the inlet tee pipe can be sprayed outward from the nozzle through the water outlet groove.

5. The vehicle-mounted tanker inner wall cleaning system according to claim 4, characterized in that: The inner bore axis of the nozzle is offset from the axis of the rotating water jacket by a certain distance, and this offset distance is as close as possible to the inner diameter of the rotating water jacket, thereby generating the largest possible rotational torque to make the rotating water jacket rotate.

6. The vehicle-mounted tanker inner wall cleaning system according to claim 4, characterized in that: The two nozzles on the rotating water jacket are arranged in a centrally symmetrical manner in the cross section of the rotating water jacket axis, so that the two nozzles generate rotational torque in the same direction when spraying.

Images