A pentane underground tank cleaning and draining system

Abstract

This application provides a cleaning and discharge system for underground pentane tanks, relating to the field of tank cleaning technology. The cleaning and discharge system includes a tank and a material extraction mechanism and a cleaning mechanism installed on the tank. The tank is equipped with the material extraction mechanism and the cleaning mechanism. The discharge pipe is connected to a first material extraction pipe and a second material extraction pipe through a one-way diverting valve. The distance between the inlet end of the second material extraction pipe and the bottom of the tank is less than the distance between the inlet end of the first material extraction pipe and the bottom of the tank. The one-way diverting valve controls the connection between the discharge pipe and the first or second material extraction pipe. During production, pentane is extracted through the first material extraction pipe. During cleaning, pentane or cleaning fluid is extracted through the second material extraction pipe, thereby safely and quickly emptying the pentane. This solves the problem of existing underground pentane tank cleaning equipment having a leakage risk at the tank top opening and a long time required for complete pentane discharge.

Description

Technical Field

[0001] This application relates to the field of tank cleaning technology, and in particular to a cleaning and discharge system for underground pentane tanks. Background Technology

[0002] Pentane is used in the production of refrigerator cabinets. Pentane is a flammable and explosive substance and is typically stored in underground tanks. The pentane from these tanks is transported to various usage locations via extraction pipes. When the underground tanks are nearly empty, new pentane is added using tank trucks. This cycle is repeated. Over long-term use, impurities accumulate in the underground tanks. To remove these impurities, the pentane in the underground tanks must be emptied.

[0003] The current method for cleaning and discharging pentane underground tanks is as follows: First, the pentane in the underground tank is extracted using a suction pipe. Because the suction port is approximately 100-150mm from the bottom of the tank, not all pentane can be extracted, leaving about 2-3 tons. Next, an opening is made at the top of the underground tank, and a temporary discharge pipe is inserted into the bottom of the tank. The top opening is then sealed. Next, nitrogen gas is introduced into the tank through the nitrogen port at the top. The remaining pentane is then discharged through the discharge pipe under pressure until all of it is expelled.

[0004] As can be seen from the above, the following problems exist in the cleaning and discharge process of underground pentane tanks: First, pentane is a flammable and explosive chemical, and there is a risk of leakage at the opening on the top of the tank; second, it takes a long time to completely discharge the remaining 2-3 tons of pentane using air pressure. Summary of the Invention

[0005] This application provides a cleaning and discharge system for an underground pentane tank. The discharge pipe is connected to a first extraction pipe and a second extraction pipe via a one-way diverting valve. The distance between the inlet end of the second extraction pipe and the bottom of the tank is less than the distance between the inlet end of the first extraction pipe and the bottom of the tank. The one-way diverting valve controls the connection between the discharge pipe and either the first or second extraction pipe. During production, pentane is extracted through the first extraction pipe. During cleaning, pentane or cleaning fluid is extracted through the second extraction pipe, thereby safely and quickly emptying the pentane tank. This solves the problem of existing underground pentane tank cleaning equipment having a leakage risk at the tank top opening and a long time required for complete pentane discharge.

[0006] This application provides a cleaning and discharging system for an underground pentane tank, including the tank and a material extraction mechanism and a cleaning mechanism disposed on the tank; The material extraction mechanism includes a material extraction motor, a discharge pipe, a single-way diverting valve, a first material extraction pipe, and a second material extraction pipe; The discharge pipe is located at the top of the tank. The discharge end of the discharge pipe is connected to the feed end of the pumping motor. The feed end of the discharge pipe extends into the tank and is connected to the discharge end of the single-way diverting valve. The discharge end of the first extraction pipe is connected to the first inlet end of the single-way diverting valve, and the inlet end of the first extraction pipe extends toward the bottom of the tank. The discharge end of the second extraction pipe is connected to the second inlet end of the single-way diverting valve, and the inlet end of the second extraction pipe extends toward the bottom of the tank. The distance between the inlet end of the second extraction pipe and the bottom of the tank is less than the distance between the inlet end of the first extraction pipe and the bottom of the tank.

[0007] In one feasible implementation, the cleaning mechanism includes a telescopic pipe, a connecting water pipe, a spray pipe, a high-pressure nozzle, a rotating shaft, a telescopic mechanism, and a drive mechanism. The telescopic pipe includes an outer pipe body and an inner pipe body. The outer pipe body is disposed on the tank. The sealed end of the outer pipe body is located outside the tank, and the open end of the outer pipe body is located inside the tank. The inner pipe body is inserted into the outer pipe body. One end of the connecting water pipe is connected to the outer pipe body of the telescopic pipe, and the other end is connected to an external water source. The open end of the spray pipe is located inside the inner tube of the telescopic pipe, and the spray pipe is rotatably connected to the inner tube. The high-pressure nozzle is disposed on the spray pipe, and multiple high-pressure nozzles are evenly distributed. The second end of the rotating shaft passes through the telescopic pipe and is connected to the inner wall of the sealed end of the spray pipe. The telescopic mechanism is disposed on the outer wall of the tank and is located on the same side of the tank as the telescopic tube. The drive mechanism is disposed at the moving end of the telescopic mechanism, and the output end of the drive mechanism is connected to the first end of the rotating shaft.

[0008] In one feasible implementation, the tank is provided with a telescopic rod, the telescopic direction of which is parallel to the axis of the spray pipe, and the telescopic end of the telescopic rod is connected to the sealed end of the spray pipe.

[0009] In one feasible implementation, the cleaning mechanism further includes a limiting mechanism, which includes a limiting cylinder and an L-shaped limiting rod; The limiting cylinder is embedded in the inner wall of the tank, and one end of the L-shaped limiting rod is connected to the inner tube of the telescopic tube, while the other end is inserted into the limiting cylinder.

[0010] In one feasible implementation, the telescopic length of the telescopic mechanism is greater than the distance between adjacent high-pressure nozzles.

[0011] In one feasible implementation, the telescopic mechanism includes a mounting plate, an electric push rod, and a connecting plate; The mounting plate is fixed to the outer wall of the tank, the electric push rod is mounted on the mounting plate, and the moving end of the electric push rod is connected to the drive mechanism through the connecting plate.

[0012] In one feasible implementation, the drive mechanism includes a mounting base, a motor, and a coupling; The mounting base is disposed on the connecting plate, the motor is fixed on the mounting base, and the output end of the motor is connected to the first end of the rotating shaft through a coupling.

[0013] In one feasible implementation, the cleaning mechanism further includes a filtration mechanism disposed on the connecting water pipe, the filtration mechanism including a filter box and a filter layer; The filter box is installed on the connecting water pipe, and the filter layer is installed inside the filter box.

[0014] In one feasible implementation, the cleaning mechanism further includes a housing disposed on the outer wall of the tank, the telescopic mechanism and the driving mechanism are both located inside the housing, and the inlet end of the connecting water pipe passes through the housing and is connected to an external water source.

[0015] In one feasible implementation, the outer wall of the rotating shaft is provided with a connecting block, the outer end of the connecting block is connected to the inner wall of the spray pipe, and a plurality of the connecting blocks are evenly distributed.

[0016] This application provides a cleaning and discharge system for an underground pentane tank. The tank is equipped with a material extraction mechanism and a cleaning mechanism. The discharge pipe is connected to a first extraction pipe and a second extraction pipe through a one-way diverting valve. The distance between the inlet end of the second extraction pipe and the bottom of the tank is less than the distance between the inlet end of the first extraction pipe and the bottom of the tank. The one-way diverting valve controls the connection between the discharge pipe and the first or second extraction pipe. During production, pentane is extracted through the first extraction pipe. During cleaning, pentane or cleaning fluid is extracted through the second extraction pipe, thereby safely and quickly emptying the pentane tank. Compared to the original cleaning and discharge method, the improved cleaning and discharge method of this application avoids openings in the tanks storing flammable and explosive materials, thus completely eliminating safety hazards; secondly, the motor discharge method is more efficient and faster than the pneumatic discharge method; at the same time, it avoids the tank body from bearing large air pressure, thereby extending the service life of the tank body; finally, the operation method of this application greatly reduces the use of manual labor, saving manpower and correspondingly reducing the risk of personnel injury. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cleaning and discharge system for the underground pentane tank provided in this application; Figure 2 This is a schematic diagram of the material extraction mechanism; Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0018] Explanation of reference numerals in the attached figures: 1-Tank; 2-Suctioning mechanism; 3-Cleaning mechanism; 21-Suction motor; 22-Discharge pipe; 23-Single-way diverting valve; 24-First suction pipe; 25-Second suction pipe; 31-Telescopic pipe; 32-Connecting water pipe; 33-Spray pipe; 34-High-pressure nozzle; 35-Rotating shaft; 36-Telescopic mechanism; 37-Drive mechanism; 38-Limiting mechanism; 39-Filtering mechanism. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0020] Pentane is the fifth member of the alkanes and has three isomers: n-pentane, isopentane, and neopentane. Uses of pentane include: common use as a solvent; use in the manufacture of artificial ice and anesthetics; serving as a standard for gas chromatography analysis; use in the preparation of standard gases and calibration gases; use as a desorbent for molecular sieves; and use in organic synthesis and the manufacture of low-temperature thermometers. Pentane is flammable and explosive and is generally stored in underground tanks. Pentane from these underground tanks is transported to various usage locations via extraction pipelines. When the underground tanks are nearly depleted, new pentane is added using tank trucks. This cycle is repeated. Over long periods of use, impurities accumulate in the underground tanks, requiring the pentane to be emptied to remove these impurities.

[0021] The current method for cleaning and discharging pentane from underground tanks is as follows: First, the pentane is extracted from the underground tank using a suction pipe. Because the suction port is approximately 100-150mm from the bottom of the tank, not all pentane can be extracted, leaving about 2-3 tons. Then, an opening is made at the top of the underground tank, a temporary discharge pipe is inserted into the bottom of the tank, and the top opening is sealed. Next, nitrogen is introduced into the tank through the nitrogen port at the top, and the remaining pentane is discharged through the discharge pipe under pressure until it is completely discharged. As can be seen from the above, the cleaning and discharging process of pentane underground tanks has the following problems: First, pentane is a flammable and explosive chemical, posing a leakage risk due to the opening at the top of the tank; second, using gas pressure to completely discharge the remaining 2-3 tons of pentane is time-consuming.

[0022] The cleaning and discharge system for the pentane underground tank provided in this application has a discharge pipe connected to a first extraction pipe and a second extraction pipe via a single-way diverting valve. The distance between the inlet end of the second extraction pipe and the bottom of the tank is less than the distance between the inlet end of the first extraction pipe and the bottom of the tank. The single-way diverting valve controls the connection between the discharge pipe and the first or second extraction pipe. During production, pentane is extracted through the first extraction pipe, and during cleaning, pentane or cleaning fluid is extracted through the second extraction pipe, thereby safely and quickly emptying the pentane tank.

[0023] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific structure of the cleaning and discharging system for the pentane underground tank provided in this application.

[0024] Reference Figures 1-3 As shown, this application provides a cleaning and discharging system for an underground pentane tank, including a tank 1 and a material extraction mechanism 2 and a cleaning mechanism 3 disposed on the tank 1. The cleaning mechanism 3 is used to flush the tank 1, and the material extraction mechanism 2 is used to extract pentane or cleaning liquid from the tank 1. The material extraction mechanism 2 includes a material extraction motor 21, a discharge pipe 22, a single-way diverting valve 23, a first material extraction pipe 24, and a second material extraction pipe 25; The discharge pipe 22, the first extraction pipe 24, and the second extraction pipe 25 can all be conventional pipes. The discharge pipe 22, the first extraction pipe 24, and the second extraction pipe 25 are all vertically arranged. The discharge pipe 22 is located at the top of the tank 1. The discharge end of the discharge pipe 22 is connected to the feed end of the extraction motor 21. The extraction motor 21 can be a conventional vacuum feeder. The feed end of the discharge pipe 22 extends into the tank 1 and is connected to the discharge end of the single-way diverting valve 23. The single-way diverting valve can be a conventional single-way electrically controlled reversing valve. The discharge end of the first extraction pipe 24 is connected to the first inlet end of the single-way diverting valve 23. The inlet end of the first extraction pipe 24 extends toward the bottom of the tank 1. The discharge end of the second extraction pipe 25 is connected to the second inlet end of the single-way diverting valve 23. The inlet end of the second extraction pipe 25 extends toward the bottom of the tank 1. The distance between the inlet end of the second extraction pipe 25 and the bottom of the tank 1 is less than the distance between the inlet end of the first extraction pipe 24 and the bottom of the tank 1. The distance between the inlet end of the first extraction pipe 24 and the bottom of the tank 1 is about 100-150mm, and the distance between the inlet end of the second extraction pipe 25 and the bottom of the tank 1 is about 5-10mm.

[0025] This application provides a cleaning and discharge system for an underground pentane tank. During production, pentane is extracted through a first extraction pipe 24, and during cleaning, pentane or cleaning fluid is extracted through a second extraction pipe 25, thereby safely and quickly emptying the pentane. Compared to the original cleaning and discharge method, this improved method avoids openings in the tanks storing flammable and explosive materials, thus completely eliminating safety hazards. Secondly, the motor-driven discharge method is more efficient and faster than the pneumatic discharge method. It also avoids the tank body being subjected to excessive air pressure, thereby extending the tank's service life. Finally, the operation method of this application greatly reduces manual labor, saving manpower and correspondingly reducing the risk of personnel injury.

[0026] Reference Figure 1 and Figure 3 As shown, in some embodiments, the cleaning mechanism 3 includes a telescopic pipe 31, a connecting water pipe 32, a spray pipe 33, a high-pressure nozzle 34, a rotating shaft 35, a telescopic mechanism 36, and a drive mechanism 37. The telescopic pipe 31 can be a metal pipe body, including an outer pipe body and an inner pipe body. The telescopic pipe 31 is set horizontally. The outer pipe body is set on the tank 1. The sealed end of the outer pipe body is located outside the tank 1, and the open end of the outer pipe body is located inside the tank 1. The inner pipe body is inserted into the outer pipe body. The outer pipe body and the inner pipe body are sealed together. The connecting water pipe 32 is located outside the tank 1. The bottom end of the connecting water pipe 32 is connected to the outer pipe body of the telescopic pipe 31, and the other end is connected to an external water source. The spray pipe 33 is a straight metal pipe. The open end of the spray pipe 33 is located inside the inner tube of the telescopic pipe 31, and the spray pipe 33 is rotatably connected to the inner tube and the two are sealed together. The high-pressure nozzle 34 is set on the spray pipe 33, and multiple high-pressure nozzles 34 are evenly distributed. The rotating shaft 35 is a metal rotating shaft. The left end of the rotating shaft 35 is located outside the tank 1, and the right end of the rotating shaft 35 passes through the telescopic pipe 31 and extends into the spray pipe 33, connecting with the inner wall of the sealed end of the spray pipe 33. The telescopic mechanism 36 is located on the outer wall of the tank 1 and on the same side of the tank 1 as the telescopic pipe 31. The telescopic direction of the telescopic mechanism 36 is parallel to the axis of the rotating shaft 35. The drive mechanism 37 is located at the moving end of the telescopic mechanism 36. The output end of the drive mechanism 37 is connected to the first end of the rotating shaft 35. The drive mechanism 37 drives the rotating shaft 35, the spray pipe 33 and multiple high-pressure nozzles 34 to rotate, so that the high-pressure nozzles 34 emit high-pressure water jets while rotating around the spray pipe 33, forming a ring-shaped water jet to flush the inner wall of the tank 1. At the same time, the telescopic mechanism 36 drives the drive mechanism 37, the rotating shaft 35, the telescopic mechanism 36 and multiple drive mechanisms 37 to move laterally back and forth, so that multiple ring-shaped water jets move laterally back and forth, thereby ensuring that all parts of the inner wall of the tank 1 can be rinsed, ensuring the cleaning effect of the tank 1.

[0027] In some embodiments, the telescopic length of the telescopic mechanism 36 is greater than the distance between adjacent high-pressure nozzles 34, thereby ensuring that all parts of the inner wall of the tank 1 can be rinsed, thus ensuring the cleaning effect of the tank 1.

[0028] Reference Figure 1 As shown, in some embodiments, a telescopic rod is provided on the right side of the tank 1. The telescopic rod extends in a direction parallel to the axis of the spray pipe 33. The telescopic end of the telescopic rod is connected to the sealed end of the spray pipe 33, thereby improving the stability of the spray pipe 33.

[0029] Reference Figure 1 and Figure 3 As shown, in some embodiments, the cleaning mechanism 3 further includes a limiting mechanism 38, which includes a limiting cylinder and an L-shaped limiting rod; The limiting cylinder is embedded in the inner wall of the tank 1, with the open end of the limiting cylinder facing the inside of the tank 1. The upper end of the L-shaped limiting rod is connected to the inner tube of the telescopic pipe 31, and the outer end is inserted into the limiting cylinder. The L-shaped limiting rod is inserted into the limiting cylinder, so that the inner tube of the telescopic pipe 31 cannot rotate with the spray pipe 33.

[0030] Reference Figure 3 As shown, in some embodiments, the telescopic mechanism 36 includes a mounting plate, an electric push rod, and a connecting plate; The mounting plate can be a rectangular plate, which is fixed to the outer wall of the tank 1. The electric push rod is horizontally set on the mounting plate, and the moving end of the electric push rod is connected to the drive mechanism 37 through the connecting plate.

[0031] In some embodiments, the drive mechanism 37 includes a mounting base, a motor, and a coupling; The mounting base is a standard motor mount, which is set on the connecting plate. The motor is a variable frequency motor, which is fixed on the mounting base. The output end of the motor is connected to the left end of the rotating shaft 35 through a coupling. When the motor is powered on, the motor drives the rotating shaft 35 to rotate through the coupling.

[0032] Reference Figure 3 As shown, in some embodiments, the cleaning mechanism 3 further includes a filtering mechanism 39, which is disposed on the connecting water pipe 32 and includes a filter box and a filter layer. The filter box can be a sealed square box, located in the middle of the connecting water pipe 32. The filter layer can be composed of multiple filter layers such as graphite filter screen and filter cotton, and is located inside the filter box to filter the cleaning fluid flowing through the connecting water pipe 32.

[0033] Reference Figure 1As shown, in some embodiments, the cleaning mechanism 3 also includes a box, which is a rectangular box and is disposed on the outer wall of the tank 1. The telescopic mechanism 36 and the drive mechanism 37 are both located inside the box, and the water inlet end of the water pipe 32 passes through the box and is connected to an external water source.

[0034] Reference Figure 1 As shown, in some embodiments, the outer wall of the rotating shaft 35 is provided with a connecting block, the outer end of the connecting block is connected to the inner wall of the spray pipe 33, and multiple connecting blocks are evenly distributed, so that the rotating shaft 35 and the spray pipe 33 are stably connected.

[0035] Based on the above technical features, the working principle of the pentane underground tank cleaning and discharge system provided in this application in practical application scenarios is as follows: During normal use, the single-way diverting valve 23 controls the connection between the discharge pipe 22 and the first extraction pipe 24. When the extraction motor 21 is working, the first extraction pipe 24 and the discharge pipe 22 extract pentane from the tank 1 for use in refrigerator production. When cleaning tank 1, first empty tank 1. The single-way diverting valve 23 connects the discharge pipe 22 to the first extraction pipe 24, and the extraction motor 21 operates, extracting pentane from tank 1 through the first extraction pipe 24 and the discharge pipe 22. When the pentane level drops to a certain height, the single-way diverting valve 23 connects the discharge pipe 22 to the second extraction pipe 25, and the extraction motor 21 operates, extracting pentane from tank 1 through the second extraction pipe 25 and the discharge pipe 22. Simultaneously, nitrogen is introduced through the gas inlet at the top of tank 1, and the remaining pentane is discharged from tank 1 under pressure through the second extraction pipe 25 and the discharge pipe 22. Then, connect the top of the water pipe 32 to the external water... The source is connected, and the external cleaning fluid flows sequentially through the connecting water pipe 32, the telescopic pipe 31, and the spray pipe 33, and is sprayed out by multiple high-pressure nozzles 34; when the motor is powered on, the motor drives the rotating shaft 35, the spray pipe 33, and the multiple high-pressure nozzles 34 to rotate through the coupling, so that the high-pressure nozzles 34 rotate around the spray pipe 33 while emitting high-pressure water jets, forming a ring water jet to flush the inner wall of the tank 1. At the same time, the telescopic mechanism 36 drives the drive mechanism 37, the rotating shaft 35, the telescopic mechanism 36, and the multiple drive mechanisms 37 to move laterally back and forth, so that multiple ring water jets move laterally back and forth, thereby ensuring that all parts of the inner wall of the tank 1 can be rinsed, ensuring the cleaning effect of the tank 1; During or after the cleaning process, the cleaning fluid in the tank 1 can be discharged through the material extraction mechanism 2.

[0036] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0037] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A cleaning and discharge system for an underground pentane tank, characterized in that: It includes a tank (1) and a material extraction mechanism (2) and a cleaning mechanism (3) disposed on the tank (1); The material extraction mechanism (2) includes a material extraction motor (21), a discharge pipe (22), a single-way diverting valve (23), a first material extraction pipe (24), and a second material extraction pipe (25); The discharge pipe (22) is located at the upper part of the tank (1). The discharge end of the discharge pipe (22) is connected to the feed end of the pumping motor (21). The feed end of the discharge pipe (22) extends into the tank (1) and is connected to the discharge end of the single-way diverting valve (23). The discharge end of the first extraction pipe (24) is connected to the first inlet end of the single-way diverting valve (23), and the inlet end of the first extraction pipe (24) extends toward the bottom of the tank (1). The discharge end of the second extraction pipe (25) is connected to the second inlet end of the single-way diverting valve (23), and the inlet end of the second extraction pipe (25) extends toward the bottom of the tank (1). The distance between the inlet end of the second extraction pipe (25) and the bottom of the tank (1) is less than the distance between the inlet end of the first extraction pipe (24) and the bottom of the tank (1). The cleaning mechanism (3) includes; Telescopic tube (31), the telescopic tube (31) includes an outer tube body and an inner tube body, the outer tube body is disposed on the tank (1), the sealed end of the outer tube body is located outside the tank (1), the open end of the outer tube body is located inside the tank (1), and the inner tube body is inserted into the outer tube body; A water pipe (32) is connected at one end to the outer pipe body of the telescopic pipe (31), and at the other end to an external water source. Spray pipe (33), the open end of the spray pipe (33) is located in the inner tube body of the telescopic pipe (31), and the spray pipe (33) is rotatably connected to the inner tube body. High-pressure nozzles (34) are disposed on the spray pipe (33), and multiple high-pressure nozzles (34) are evenly distributed. A rotating shaft (35) has its second end passing through the telescopic pipe (31) and connected to the inner wall of the sealing end of the spray pipe (33). Telescopic mechanism (36), the telescopic mechanism (36) is disposed on the outer wall of the tank (1) and is located on the same side of the tank (1) as the telescopic pipe (31); A drive mechanism (37) is provided at the moving end of the telescopic mechanism (36), and the output end of the drive mechanism (37) is connected to the first end of the rotating shaft (35). The tank (1) is provided with a telescopic rod. The telescopic rod extends in a direction parallel to the axis of the spray pipe (33). The telescopic end of the telescopic rod is connected to the sealing end of the spray pipe (33). The cleaning mechanism (3) further includes a limiting mechanism (38), which includes a limiting cylinder and an L-shaped limiting rod; The limiting cylinder is embedded in the inner wall of the tank (1). One end of the L-shaped limiting rod is connected to the inner tube of the telescopic tube (31), and the other end is inserted into the limiting cylinder.

2. The cleaning and discharge system for pentane underground tanks according to claim 1, characterized in that: The telescopic length of the telescopic mechanism (36) is greater than the distance between adjacent high-pressure nozzles (34).

3. The cleaning and discharge system for pentane underground tanks according to claim 1 or 2, characterized in that: The telescopic mechanism (36) includes a mounting plate, an electric push rod, and a connecting plate; The mounting plate is fixed to the outer wall of the tank (1), the electric push rod is mounted on the mounting plate, and the moving end of the electric push rod is connected to the drive mechanism (37) through the connecting plate.

4. The cleaning and discharge system for underground pentane tanks according to claim 3, characterized in that: The drive mechanism (37) includes a mounting base, a motor, and a coupling; The mounting base is disposed on the connecting plate, the motor is fixed on the mounting base, and the output end of the motor is connected to the first end of the rotating shaft (35) through a coupling.

5. The cleaning and discharging system for pentane underground tanks according to claim 1, characterized in that: The cleaning mechanism (3) further includes a filtration mechanism (39), which is disposed on the connecting water pipe (32) and includes a filter box and a filter layer. The filter box is installed on the connecting water pipe (32), and the filter layer is installed inside the filter box.

6. The cleaning and discharging system for pentane underground tanks according to claim 5, characterized in that: The cleaning mechanism (3) also includes a housing, which is located on the outer wall of the tank (1). The telescopic mechanism (36) and the driving mechanism (37) are both located inside the housing. The water inlet of the connecting water pipe (32) passes through the housing and is connected to an external water source.

7. The cleaning and discharging system for pentane underground tanks according to claim 1, characterized in that: The outer wall of the rotating shaft (35) is provided with a connecting block, the outer end of the connecting block is connected to the inner wall of the spray pipe (33), and multiple connecting blocks are evenly distributed.

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