Full-automatic online closed polymeric kettle cleaning device

Abstract

The utility model relates to the technical field of PVC polymerization kettles, in particular to a full-automatic online closed polymerization kettle cleaning device which comprises a cleaning gun assembly arranged on a closed polymerization kettle, a rodless air cylinder assembly used for driving the cleaning gun assembly, a spray head storage bin assembly used for being matched with the cleaning gun assembly and a water supply mechanism. The cleaning gun assembly comprises a cleaning gun rod used for stretching into the closed polymerization kettle and a three-dimensional rotating spray head arranged on the cleaning gun rod, a water inlet and a water outlet are formed in the two ends of the cleaning gun rod, and the three-dimensional rotating spray head is rotationally installed at the end, provided with the water outlet, of the cleaning gun rod. And one end of the water inlet of the cleaning gun barrel is connected with a high-pressure hose communicated with the water supply mechanism. The device has the effects of reducing the number of times of uncovering off-line cleaning of the polymerization kettle, reducing the number of times of unplanned shutdown, improving the production efficiency and saving the production cost.

Description

Technical Field

[0001] This application relates to the technical field of PVC polymerization reactors, and in particular to a fully automatic online closed polymerization reactor cleaning device. Background Technology

[0002] Polyvinyl chloride (PVC) is the world's third-largest synthetic polymer plastic by production volume, after polyethylene and polypropylene. It possesses excellent heat resistance, abrasion resistance, corrosion resistance, fire retardancy, and insulation properties. As of October 2024, global annual PVC consumption was approximately 38.5 million tons, while my country's annual PVC production capacity was approximately 23.5 million tons, making it the largest producer and consumer of PVC. The key process in PVC resin production control is the polymerization process, which generally follows four technical routes. Domestic PVC production technology primarily utilizes the suspension polymerization process, whose technology is mainly imported. Polymerization reactor equipment has now been domestically produced and manufactured, with optimizations and improvements made to existing imported equipment.

[0003] PVC polymerization reactors are mainly used to mix vinyl chloride monomer (VCM) with other polymerization promoters and carry out the polymerization reaction under certain temperature and pressure. After producing one batch of PVC products, the polymer scale on the inner wall of the liquid phase space inside the reactor is relatively small, while the polymer scale on the inner wall of the gas phase space at the top of the reactor is more severe. Scale reduces heat transfer performance, causes unstable reaction temperature control, and seriously affects parameters such as viscosity, fisheye appearance, and whiteness of the produced PVC products. Producing one batch of PVC products takes about 4 hours and involves a series of operations including feeding, adding additives, heating, stirring, reaction, and discharging. Production companies will formulate PVC product model production plans according to market demand. Generally, the reactor is opened and cleaned after producing 100-200 batches of products. The frequency of cleaning varies depending on the technical route. Before cleaning, blind flanges, replacement, and manholes need to be installed according to maintenance requirements. The polymerization reactor is thoroughly cleaned using offline cleaning equipment (currently mainly imported equipment). This operation is called offline cleaning. Cleaning the polymerization reactor and other auxiliary systems generally takes more than 12 hours. PVC production is an intermittent process, requiring necessary cleaning and rinsing. The time spent on these tasks significantly impacts the efficiency of the PVC plant. To further reduce the frequency of cleaning the polymerization reactor, a short (within 10 minutes) fully automated, online, closed-loop cleaning is crucial between the discharge of one reactor and the feeding of the next. Online cleaning improves the quality of each PVC reactor batch, reduces polymer scale buildup on the inner wall of the reactor top vapor space, minimizes offline cleaning by opening the reactor, reduces unplanned shutdowns, increases production efficiency, and saves on production costs. Utility Model Content

[0004] In order to reduce the number of times the polymerization reactor needs to be opened for offline cleaning, reduce unplanned shutdowns, improve production efficiency, and save production costs, this application provides a fully automatic online closed polymerization reactor cleaning device.

[0005] The fully automatic online closed polymerization reactor cleaning device provided in this application adopts the following technical solution:

[0006] A fully automatic online closed polymerization reactor cleaning device includes a cleaning gun assembly disposed in the closed polymerization reactor, a rodless cylinder assembly for driving the cleaning gun assembly, a nozzle parking chamber assembly for cooperating with the cleaning gun assembly, and a water supply mechanism.

[0007] The cleaning gun assembly includes a cleaning gun rod for extending into the interior of a sealed polymerization reactor and a three-dimensional rotating nozzle disposed on the cleaning gun rod. The cleaning gun rod has an inlet and an outlet at both ends. The three-dimensional rotating nozzle is rotatably mounted on the outlet end of the cleaning gun rod. The inlet end of the cleaning gun rod is connected to a high-pressure hose for communicating with the water supply mechanism.

[0008] Driven by the rodless cylinder assembly, the cleaning gun rod enables the three-dimensional rotating nozzle to have a high cleaning position, a low cleaning position, and a non-cleaning position in the storage chamber within the sealed polymerization reactor.

[0009] By adopting the above technical solution, the cleaning gun assembly is the key component that directly cleans the interior of the polymerization reactor. The cleaning gun rod extends into the sealed polymerization reactor, with inlets and outlets at both ends to ensure the inflow and outflow of cleaning water. A three-dimensional rotating nozzle located at the outlet end of the cleaning gun rod can rotate to achieve multi-directional cleaning coverage, ensuring effective cleaning of dirt in different locations within the polymerization reactor. The inlet end of the cleaning gun rod is connected to the water supply mechanism via a high-pressure hose, providing the necessary water flow power for the cleaning operation. The rodless cylinder assembly precisely controls the position movement of the cleaning gun rod, allowing the three-dimensional rotating nozzle to switch between different positions to meet the cleaning needs of different stages. The nozzle parking chamber assembly provides a parking position for the three-dimensional rotating nozzle. When cleaning is not required, the nozzle can be parked in a non-cleaning position within this assembly, ensuring proper placement of the nozzle in the non-working state and facilitating the restart of subsequent cleaning operations. Traditional methods require cleaning the reactor after every 100-200 batches of product. This fully automated online closed-loop polymerization reactor cleaning device, however, can perform short-duration (within 10 minutes) online cleaning between each batch of production. Online cleaning minimizes the number of times the reactor needs to be opened for offline cleaning, effectively preventing unplanned shutdowns caused by this, ensuring production continuity, and improving the overall stability of the equipment.

[0010] Furthermore, the rodless cylinder assembly includes a rodless cylinder body and a drive piston disposed on the rodless cylinder body, the drive piston being fixedly connected to the cleaning gun rod;

[0011] The rodless cylinder has an upper positioning plate and a lower positioning plate at both ends, and a guide assembly for cooperating with the cleaning gun rod is provided between the upper positioning plate and the lower positioning plate.

[0012] By adopting the above technical solution, the drive piston in the rodless cylinder assembly provides stable and precise drive for the cleaning gun rod. The movement of the piston within the rodless cylinder precisely controls the position of the cleaning gun rod, ensuring that the three-dimensional rotating nozzle can accurately reach the high cleaning station, low cleaning station, and non-cleaning station, achieving efficient and comprehensive cleaning of the polymerization reactor. Precise positioning ensures that the nozzle can achieve the best cleaning effect at each station, avoiding cleaning blind spots or incomplete cleaning due to positional deviations. The guide component between the upper and lower positioning plates of the rodless cylinder works in conjunction with the cleaning gun rod. During the piston-driven movement of the cleaning gun rod, the guide component prevents the gun rod from deviating or wobbling, allowing the cleaning gun rod to move along a predetermined trajectory, enhancing the directionality and stability of the cleaning gun rod's movement.

[0013] Furthermore, the guide assembly includes a guide rail disposed along the length direction of the rodless cylinder and fixedly connected between the upper positioning plate and the lower positioning plate, and a moving component slidably mounted on the guide rail, wherein the moving component is fixedly connected to the drive piston.

[0014] By adopting the above technical solution, the guide rail is set along the length of the rodless cylinder and fixedly connected between the upper and lower positioning plates, providing a clear and fixed movement path for the moving parts. During the process of the rodless cylinder assembly driving the cleaning gun rod, the moving parts are slidably mounted on the guide rail, ensuring that the movement direction of the cleaning gun rod always follows the predetermined route. This allows the three-dimensional rotating nozzle to accurately reach the set position when switching between high cleaning stations, low cleaning stations, and non-cleaning stations, effectively avoiding problems such as incomplete cleaning or collisions with other components inside the polymerization reactor that may occur due to deviations in the movement trajectory, thereby ensuring the accuracy and reliability of the cleaning work.

[0015] Furthermore, the rodless cylinder body is provided with an instrument air pipeline for connecting to the air supply mechanism, and the rodless cylinder body is provided with an air source control solenoid valve at the upper end for controlling the opening and closing of the instrument air pipeline.

[0016] By adopting the above technical solution, the rodless cylinder body is equipped with an instrument air pipeline connected to the air supply mechanism, providing a stable and adjustable air source for the rodless cylinder assembly. An air source control solenoid valve is used to control the opening and closing of the instrument air pipeline, providing a foundation for the automated control of the cleaning device. In the automated cleaning process, the opening and closing times of the solenoid valve can be precisely controlled by the PLC control system according to a preset program, thereby achieving automated management of the air supply to the rodless cylinder assembly. This allows for precise control of the amount of gas supplied to the rodless cylinder based on the different movement requirements of the cleaning gun rod, thus achieving precise adjustment of the speed and force of the driving piston.

[0017] Furthermore, the nozzle parking chamber assembly includes a parking chamber and a nozzle cleaning ring pipe disposed in the parking chamber. The nozzle cleaning ring pipe includes an annular hose that is wound around the outside of the parking chamber and communicates with the high-pressure hose, and a plurality of cleaning heads that are spaced apart on the nozzle cleaning ring pipe. Each cleaning head passes through and is fixedly connected to the outer wall of the parking chamber.

[0018] By adopting the above technical solution, the nozzle cleaning ring pipe includes a ring-shaped hose wrapped around the outside of the parking chamber and multiple cleaning heads arranged at intervals, all of which are inserted through and fixedly connected to the outer wall of the parking chamber. When the three-dimensional rotating nozzle is parked in a non-cleaning position inside the parking chamber, high-pressure water supplied by the water supply mechanism can be delivered to each cleaning head through the ring-shaped hose connected to the high-pressure hose. Each cleaning head performs a comprehensive rinse on the three-dimensional rotating nozzle parked in the parking chamber, removing any dirt that may have remained in the nozzle during previous cleaning operations, maintaining the nozzle's cleanliness, and ensuring that it can perform its cleaning function normally when put into use next time, avoiding the impact of nozzle blockage or dirt accumulation on the cleaning effect.

[0019] Furthermore, an isolation ball valve is provided between the parking chamber and the closed polymerization reactor. The isolation ball valve is interconnected with both the parking chamber and the closed polymerization reactor. The isolation ball valve has a full-bore ball valve chamber through which the cleaning gun rod assembly passes.

[0020] By adopting the above technical solution, the isolation ball valve installed between the storage chamber and the closed polymerization reactor serves as an isolation mechanism. After the cleaning work is completed, when the three-dimensional rotating nozzle is placed in the storage chamber, closing the isolation ball valve completely isolates the storage chamber from the internal environment of the polymerization reactor. This prevents any uncleaned dirt, impurities, or chemicals that may be present in the polymerization reactor from entering the storage chamber, avoiding contamination or corrosion of the nozzle, thus protecting the nozzle's cleanliness when not in a cleaning position. During normal production in the polymerization reactor, closing the isolation ball valve also prevents water droplets or cleaning solutions generated during nozzle cleaning from entering the polymerization reactor, avoiding adverse effects on the ongoing chemical reactions or product quality, and ensuring the purity and stability of the polymerization reactor's production environment.

[0021] Furthermore, the parking compartment is provided with a high-pressure sealing component at the top for sealing with the cleaning gun rod.

[0022] By adopting the above technical solution, the high-pressure sealing component effectively seals the parking chamber, ensuring that the entire cleaning device will not experience issues such as unstable pressure, poor cleaning effect, or equipment failure due to leakage during operation. The high-pressure sealing component and the isolation ball valve work together to form a relatively closed system, enabling the equipment to operate stably and efficiently according to design requirements.

[0023] Furthermore, the water supply mechanism includes a high-pressure water pump connected to the high-pressure hose and a water pump drive motor electrically connected to the high-pressure water pump.

[0024] By adopting the above technical solution, the high-pressure water pump in the water supply mechanism is connected to the high-pressure hose. The high-pressure water pump can generate strong pressure, so that the water flow is sprayed out from the nozzle at a high speed and with a strong impact force, providing a high-pressure water flow for cleaning. When cleaning the closed polymerization reactor, sufficient water pressure can ensure that the three-dimensional rotating nozzle can effectively flush the dirt in different parts of the polymerization reactor, ensuring the thoroughness of the cleaning effect.

[0025] Furthermore, it also includes a water supply distribution panel. The high-pressure hose has a main pipeline for connecting to the high-pressure water pump and a first branch pipe for connecting to the cleaning gun rod and a second branch pipe for connecting to the nozzle cleaning ring pipe. The end of the main pipeline away from the connection to the high-pressure water pump is connected to the water supply distribution panel. The ends of the first branch pipe away from the connection to the cleaning gun rod and the ends of the second branch pipe away from the connection to the nozzle cleaning ring pipe are both connected to the water supply distribution panel.

[0026] By adopting the above technical solution, the water distribution panel enables the water supply mechanism to distribute water to different water-using components. A high-pressure water pump is connected to the water distribution panel via a main pipeline. The distribution panel then supplies water to the cleaning gun rod through a first branch pipe and to the nozzle cleaning ring pipe through a second branch pipe, achieving targeted water supply for two different needs: cleaning the cleaning gun rod for internal cleaning of the polymerization reactor and cleaning the nozzles themselves through the nozzle cleaning ring pipe. Flexible allocation allows for the rational adjustment of water flow and pressure based on actual cleaning conditions, such as the intensity requirements of cleaning operations at different workstations and the specific cleaning requirements of the nozzle cleaning ring pipe for nozzles. This ensures that each water-using component receives appropriate water volume and pressure, thereby improving the overall cleaning effect.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Online cleaning replaces traditional open-top cleaning, significantly reducing unplanned shutdowns, ensuring continuous PVC production, and improving the overall stability of the unit. The nozzle cleaning ring keeps the nozzles clean, and the water distribution panel rationally allocates water, facilitating efficient subsequent cleaning, precisely meeting different cleaning needs, reducing maintenance costs, and improving overall economic efficiency.

[0029] 2. The three-dimensional rotating nozzle of the cleaning gun assembly can cover multiple directions, and with the precise positioning of the rodless cylinder, it ensures efficient operation of the nozzle at high and low cleaning positions, removing dirt from all parts of the polymerization reactor. The guide assembly ensures precise and stable movement, avoiding cleaning blind spots and collisions. The water supply mechanism provides high-pressure water flow to powerfully flush away dirt. The coordinated operation of all components greatly improves the comprehensiveness, accuracy, and effectiveness of the cleaning.

[0030] 3. The nozzle parking chamber, isolation ball valve, and high-pressure sealing components form a sealed protection system to isolate contaminants, maintain stable pressure, and prevent impurities from affecting equipment and product quality. The air supply mechanism and air source control solenoid valve achieve automated control, precisely adjusting the rodless cylinder's movement to ensure that each link operates sequentially and stably, reducing malfunctions and extending equipment lifespan. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a fully automatic online closed polymerization reactor cleaning device according to an embodiment of this application (the three-dimensional rotating nozzle is located in the non-cleaning station inside the closed polymerization reactor).

[0032] Figure 2 This is a schematic diagram of the overall structure of a fully automatic online closed polymerization reactor cleaning device according to an embodiment of this application (the three-dimensional rotating nozzle is located at the high cleaning station inside the closed polymerization reactor).

[0033] Figure 3 yes Figure 1 A partial structural diagram of the rodless cylinder assembly in section A.

[0034] Figure 4 yes Figure 3 A partial structural diagram of the cleaning gun barrel and guide assembly in section B.

[0035] Figure 5 yes Figure 3 A partial structural diagram of the parking compartment assembly and isolation ball valve in section C.

[0036] Explanation of reference numerals in the attached diagram: 0. Sealed polymerization reactor; 01. Cleaning port; 1. Cleaning gun assembly; 11. Cleaning gun rod; 12. Three-dimensional rotating nozzle; 2. Rodless cylinder assembly; 21. Rodless cylinder body; 211. Upper positioning plate; 212. Lower positioning plate; 213. Guide assembly; 2131. Guide rail; 2132. Moving parts; 22. Drive piston; 23. Instrument air pipeline; 24. Air source control solenoid valve; 3. Parking compartment assembly; 3 1. Parking compartment; 311. High-pressure sealing component; 312. Pressure transmitter; 313. Safety valve; 32. Nozzle cleaning ring pipe; 321. Ring hose; 322. Cleaning head; 4. Water supply mechanism; 41. High-pressure water pump; 42. Water pump drive motor; 5. Water supply distribution panel; 6. Air supply mechanism; 7. High-pressure hose; 71. Main pipeline; 72. First branch pipe; 73. Second branch pipe; 8. Isolation ball valve; 81. Full-bore ball valve chamber. Detailed Implementation

[0037] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present application will be further described in detail with reference to the embodiments.

[0038] This application discloses a fully automatic online closed-loop polymerization reactor cleaning device. (Refer to...) Figure 1 and Figure 2 The fully automatic online closed polymerization reactor cleaning device includes a cleaning gun assembly 1, a rodless cylinder assembly 2, a storage chamber assembly 3, a water supply mechanism 4, a water distribution plate 5, and an air supply mechanism 6. The cleaning gun assembly 1 can be used to extend into the closed polymerization reactor 0 for cleaning, the rodless cylinder assembly 2 can drive the cleaning gun assembly 1, and the storage chamber assembly 3 can be used to store the cleaning gun assembly 1 that has not been cleaned.

[0039] The cleaning gun assembly 1 includes a cleaning gun rod 11 and a three-dimensional rotating nozzle 12. The cleaning gun rod 11 is arranged vertically and is used to extend into the closed polymerization reactor 0. The cleaning gun rod 11 has an inlet and an outlet at both ends. The three-dimensional rotating nozzle 12 is installed at the outlet end of the cleaning gun rod 11. A high-pressure hose 7 is connected to the inlet end of the cleaning gun rod 11. The high-pressure hose 7 is used to connect to the water supply mechanism 4.

[0040] Reference Figure 3 and Figure 4The rodless cylinder assembly 2 includes a rodless cylinder body 21, a drive piston 22, an instrument air line 23, and an air source control solenoid valve 24. The rodless cylinder body 21 has an upper positioning plate 211 and a lower positioning plate 212 at both ends. A guide assembly 213 for cooperating with the cleaning gun rod 11 is provided between the upper positioning plate 211 and the lower positioning plate 212. The guide assembly 213 includes two parallel guide rails 2131 and a moving part 2132 disposed on the guide rails 2131. The guide rails 2131 are arranged along the length direction of the rodless cylinder body 21 and fixedly connected between the upper positioning plate 211 and the lower positioning plate 212. The moving part 2132 is slidably mounted on the guide rails 2131 and is fixedly connected to the drive piston 22. The drive piston 22 is fixedly connected to the cleaning gun rod 11.

[0041] The instrument air line 23 and the air source control solenoid valve 24 are both mounted on the rodless cylinder body 21. The instrument air line 23 is used to connect to the air supply mechanism 6, and the air source control solenoid valve 24 is used to control the opening and closing of the instrument air line 23. In this embodiment, the reciprocating motion of the drive piston 22 on the guide rail 2131 is controlled by a directional valve. The directional valve can be a five-position three-way valve or a three-position two-way valve. The directional valve is a valve with two or more flow patterns and two or more flow directions. It is a valve that realizes the interconnection, cut-off and reversal of the instrument air source, as well as pressure unloading and sequential action control.

[0042] Reference Figure 5 The nozzle parking chamber assembly 3 includes a parking chamber 31 installed on the lower positioning plate 212 and a nozzle cleaning ring pipe 32 disposed in the parking chamber 31. The nozzle cleaning ring pipe 32 includes an annular hose 321 that is wound around the outside of the parking chamber 31 and communicates with the high-pressure hose 7, and a plurality of cleaning heads 322 that are spaced apart on the annular hose 321. Each cleaning head 322 is inserted through and fixedly connected to the outer wall of the parking chamber 31.

[0043] Combination Figure 1 and Figure 2 The water supply mechanism 4 includes a high-pressure water pump 41 connected to a high-pressure hose 7 and a water pump drive motor 42 electrically connected to the high-pressure water pump 41. The high-pressure hose 7 has a main pipe 71 for connection to the high-pressure water pump 41, a first branch pipe 72 for connection to the cleaning gun rod 11, and a second branch pipe 73 for connection to the nozzle cleaning ring pipe 32. The end of the main pipe 71 away from the connection to the high-pressure water pump 41 is connected to the water supply distribution plate 5. The ends of the first branch pipe 72 away from the connection to the cleaning gun rod 11 and the ends of the second branch pipe 73 away from the connection to the nozzle cleaning ring pipe 32 are both connected to the water supply distribution plate 5. The water supply mechanism 4 can provide high-pressure cleaning water of 11 MPaG or higher, and the water supply mechanism 4 pressurizes the cleaning water and delivers it to the inlet of the water supply distribution plate 5.

[0044] The closed polymerization reactor 0 has a cleaning port 01, and an isolation ball valve 8 is installed between the storage chamber 31 and the cleaning port 01. The isolation ball valve 8 can be single or double; in this embodiment, it is a single valve. The isolation ball valve 8 has a full-bore ball valve chamber 81 through which the cleaning gun rod 11 assembly passes. The cleaning port 01 of the closed polymerization reactor should be designed with a short length, and a nitrogen-filled isolation connector should be installed on the side of the port for intermittent nitrogen purging to reduce the cumulative blockage of the cleaning port 01 by polymer scaling during the polymerization process, further extending the service life of the isolation ball valve 8.

[0045] The storage compartment 31 is equipped with a high-pressure sealing component 311 at the top for sealing with the cleaning gun rod 11. The high-pressure sealing component 311 has a sealing channel through which the cleaning gun rod 11 passes and slides. In this embodiment, the high-pressure sealing component 311 can be implemented using one or more hydraulic oil seals. When the polymerization reactor is in the cleaning state, pure water above 0.5 MPaG is provided to flush and lubricate the high-pressure sealing component to ensure that the hydraulic oil seal and the cleaning gun rod 11 do not experience dry friction, thus maximizing the lifespan of the high-pressure sealing component 311. When the polymerization reactor is not in the cleaning state, the high-pressure sealing component 311 can seal the 1.5 MPaG high pressure from inside the polymerization reactor in the event of leakage from the isolation ball valve 8.

[0046] The storage compartment 31 is equipped with a pressure transmitter 312 and a safety valve 313 on its side wall. The pressure transmitter 312 is used to monitor and determine whether the isolation ball valve 8 is leaking, so that it can be repaired and handled in time when leakage occurs. The safety valve 313 is used to release pressure when the isolation ball valve 8 leaks a lot, or when the pressure inside the polymerization reactor is abnormal and exceeds 1.5 MPaG.

[0047] The implementation principle of the fully automatic online closed polymerization reactor cleaning device in this application embodiment is as follows: The cleaning gun rod 11 of the cleaning gun assembly 1 extends vertically into the closed polymerization reactor 0. The three-dimensional rotating nozzle 12 obtains high-pressure water through the high-pressure hose 7 connected to the water supply mechanism 4 to carry out cleaning work. The rodless cylinder assembly 2 precisely controls the position of the cleaning gun rod 11 by means of the driving piston 22 and the guide assembly 213 set along the length of the cylinder body. With the cooperation of the reversing valve, the air source control solenoid valve 24 and the instrument air pipeline 23, the automatic and precise action adjustment is realized. Under the drive of the rodless cylinder assembly 2, the cleaning gun rod 11 enables the three-dimensional rotating nozzle 12 to have a high cleaning position, a low cleaning position and a non-cleaning position in the closed polymerization reactor 0, thereby meeting the needs of different cleaning stages. The nozzle storage chamber assembly 3 has a storage function, and its nozzle cleaning ring pipe 32 can also use the water distributed by the water supply distribution plate 5 to clean the nozzle. In addition, an isolation ball valve 8 is provided between the nozzle and the polymerization reactor, and nitrogen is filled into the pipe port to reduce scaling and blockage. Meanwhile, the high-pressure sealing component 311 ensures the seal. In both the cleaning and non-cleaning states of the polymerization reactor, the lifespan is extended and the seal is maintained by rinsing with pure water and enduring high pressure. The pressure transmitter 312 monitors and the safety valve 313 responds to abnormal high pressure, ensuring the safe and stable operation of the equipment and the effective implementation of cleaning operations in all aspects.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully automatic online closed-loop polymerization reactor cleaning device, characterized in that: It includes a cleaning gun assembly (1) installed in a closed polymerization reactor, a rodless cylinder assembly (2) for driving the cleaning gun assembly (1), a nozzle parking chamber assembly (3) for cooperating with the cleaning gun assembly (1), and a water supply mechanism (4). The cleaning gun assembly (1) includes a cleaning gun rod (11) for extending into the interior of a sealed polymerization reactor and a three-dimensional rotating nozzle (12) disposed on the cleaning gun rod (11). The cleaning gun rod (11) has an inlet and an outlet at both ends. The three-dimensional rotating nozzle (12) is rotatably mounted on the outlet end of the cleaning gun rod (11). The inlet end of the cleaning gun rod (11) is connected to a high-pressure hose (7) for communicating with the water supply mechanism (4). Driven by the rodless cylinder assembly (2), the cleaning gun rod (11) enables the three-dimensional rotating nozzle (12) to have a high cleaning station, a low cleaning station, and a non-cleaning station located in the closed polymerization reactor.

2. The fully automatic online closed polymerization reactor cleaning device according to claim 1, characterized in that: The rodless cylinder assembly (2) includes a rodless cylinder body (21) and a drive piston (22) disposed in the rodless cylinder body (21), wherein the drive piston (22) is fixedly connected to the cleaning gun rod (11); The rodless cylinder body (21) has an upper positioning plate (211) and a lower positioning plate (212) at both ends, and a guide assembly (213) for cooperating with the cleaning gun rod (11) is provided between the upper positioning plate (211) and the lower positioning plate (212).

3. The fully automatic online closed polymerization reactor cleaning device according to claim 2, characterized in that: The guide assembly (213) includes a guide rail (2131) arranged along the length direction of the rodless cylinder (21) and fixedly connected between the upper positioning plate (211) and the lower positioning plate (212), and a moving component (2132) slidably mounted on the guide rail (2131), wherein the moving component (2132) is fixedly connected to the drive piston (22).

4. The fully automatic online closed polymerization reactor cleaning device according to claim 2, characterized in that: The rodless cylinder body (21) is provided with an instrument air pipeline (23) for connecting the air supply mechanism (6), and the rodless cylinder body (21) is provided with an air source control solenoid valve (24) at the upper end for controlling the opening and closing of the instrument air pipeline (23).

5. The fully automatic online closed polymerization reactor cleaning device according to claim 1, characterized in that: The nozzle parking chamber assembly (3) includes a parking chamber (31) and a nozzle cleaning ring pipe (32) disposed in the parking chamber (31). The nozzle cleaning ring pipe (32) includes an annular hose (321) that is wrapped around the outside of the parking chamber (31) and communicates with the high-pressure hose (7) and a plurality of cleaning heads (322) that are spaced apart on the nozzle cleaning ring pipe (32). Each cleaning head (322) is inserted through and fixedly connected to the outer wall of the parking chamber (31).

6. The fully automatic online closed polymerization reactor cleaning device according to claim 5, characterized in that: An isolation ball valve (8) is provided between the parking chamber (31) and the closed polymerization reactor. The isolation ball valve (8) is interconnected with both the parking chamber (31) and the closed polymerization reactor. The isolation ball valve (8) has a full-bore ball valve chamber (81) through which the cleaning gun rod (11) assembly passes.

7. The fully automatic online closed polymerization reactor cleaning device according to claim 5, characterized in that: The parking compartment (31) is provided at the top with a high-pressure sealing component (311) for sealing with the cleaning gun rod (11), the high-pressure sealing component (311) having a sealing channel through which the cleaning gun rod (11) passes and slides.

8. The fully automatic online closed polymerization reactor cleaning device according to claim 5, characterized in that: The water supply mechanism (4) includes a high-pressure water pump (41) connected to the high-pressure hose (7) and a water pump drive motor (42) electrically connected to the high-pressure water pump (41).

9. The fully automatic online closed polymerization reactor cleaning device according to claim 8, characterized in that: It also includes a water supply distribution plate (5), the high-pressure hose (7) having a main pipe (71) for connection to the high-pressure water pump (41) and a first branch pipe (72) for connection to the cleaning gun rod (11) and a second branch pipe (73) for connection to the nozzle cleaning ring pipe (32). The end of the main pipe (71) away from the connection to the high-pressure water pump (41) is connected to the water supply distribution plate (5), and the end of the first branch pipe (72) away from the connection to the cleaning gun rod (11) and the end of the second branch pipe (73) away from the connection to the nozzle cleaning ring pipe (32) are both connected to the water supply distribution plate (5).

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