Automatic sampling device for oily sewage treatment system

Abstract

The invention relates to the technical field of sewage sampling, in particular to an automatic sampling device for an oily sewage treatment system, which comprises a cleaning unit for cleaning a container; the cleaning unit comprises a lifting shell moving in the vertical direction, a follow-up shell is rotationally arranged on the lower portion of the lifting shell, a trigger block is horizontally and movably arranged on the lower portion of the follow-up shell, the trigger block can make contact with the inner wall of the container when stretching out, the pressure of the trigger block on the inner wall of the container is constant, and a torsion monitoring unit is arranged between the follow-up shell and the lifting shell. When the cleanliness of the inner wall of the container is detected, the lifting shell drives the follow-up shell to rotate through the torsion monitoring unit, and the torsion monitoring unit is used for monitoring the friction force between the trigger block and the inner wall of the container. According to the invention, standards for detecting the cleanliness of the container are unified, subjectivity existing in manual detection of the cleanliness of the inner wall of the container is avoided, and accurate detection of the cleanliness in the container is realized.

Description

Technical Field

[0001] The invention relates to the technical field of sewage sampling, and in particular to an automatic sampling device for an oily sewage treatment system. Background Art

[0002] In the process of collecting oily wastewater, it is necessary to manually connect the rope to throw the sampling cup into the oily wastewater pool to collect the oily wastewater, and then slowly pull the collected wastewater up for collection. This is not only time-consuming and laborious, but also easy to cause a large amount of sample wastewater to splash out when pulling up the collection cup, thus requiring secondary sampling, which is quite troublesome.

[0003] Chinese patent announcement number CN218956155U discloses an automatic sampling device for an oil and gas field wastewater treatment system, comprising a mounting frame and a sampling mechanism, wherein the mounting frame is mounted on a box cover above an external oil and wastewater pool, and a controller is mounted on the upper end of the mounting frame and is electrically connected to an external power supply, a mounting frame is connected through the middle of the upper end of the mounting frame, and a guide wheel is movably connected to the middle of the mounting frame, a through hole is penetrated through the bottom of the mounting frame, and a take-up drum is mounted on one side of the through hole at the bottom of the mounting frame, a winding shaft is movably connected to the middle of the winding shaft, and a steel wire rope is wound on the winding shaft, a stepper motor is mounted on the side end of the take-up drum, and the rotating shaft of the stepper motor passes through the take-up drum and is connected to the winding shaft, one end of three connecting ropes is connected to the upper part of the sampling mechanism, and the other ends of the three connecting ropes are wound together, the steel wire rope passes through the guide wheel downward, and passes through the through hole to be connected to the three winding connecting ropes.

[0004] The above scheme realizes the automatic collection of oily wastewater. However, after each collection is completed, since there is oil floating on the upper layer of the wastewater, the container used to hold the wastewater will be attached to the inside and outside of the container after contact with the oil. In order to ensure the accuracy of the experiment, the container needs to be cleaned before the second collection. However, it is difficult to clean the container wrapped in oil. Traditional cleaning methods are mostly manual cleaning. The cleaning condition of the container needs to be determined through human observation. Human judgment of whether the container is clean is subjective and can easily have a significant impact on subsequent test results. Although the existing automatic collection device is equipped with a cleaning unit for cleaning the container, due to the particularity of oily wastewater, after cleaning, some oil is adhered to the container. If the color of the oil is transparent, the existing sensor cannot correctly detect the oil adhered to the container. Summary of the invention

[0005] In view of the above problems, an automatic sampling device for an oily wastewater treatment system is provided. A lifting shell and a follower shell are provided, and a torque monitoring unit is provided between the lifting shell and the follower shell, so that when the cleaning unit detects the inner wall of the container, the lifting shell drives the follower shell to rotate through the torque monitoring unit, and the follower shell drives the trigger block to rotate synchronously. The trigger block slides with the inner wall of the container. The lifting shell drives the follower shell to rotate while driving the follower shell to rise in the vertical direction, so that the trigger block gradually rises in a spiral shape, so that the trigger block can completely sweep the inner wall of the container. At the same time, a threshold range is preset for the torque monitoring unit. When the container is cleaned, if there is no oil stain in the container, the value monitored by the torque monitoring unit is always within the threshold range during the process of the trigger block contacting the inner wall of the container. If there is oil stain on the inner wall of the container, the friction coefficient between the trigger block and the inner wall of the container is greatly reduced when the trigger block passes the oil stain position. At this time, the torque monitored by the torque monitoring unit will suddenly drop, and the torque is lower than the threshold range. If this is the case, it means that the container has not been cleaned and needs to be cleaned again. The present invention unifies the standard for detecting the cleanliness of the container, avoids the subjectivity existing in artificially detecting the cleanliness of the inner wall of the container, and realizes the accurate detection of the cleanliness inside the container.

[0006] In order to solve the problems of the prior art, the present invention provides an automatic sampling device for an oily wastewater treatment system, comprising a cleaning unit for cleaning a container; the cleaning unit comprises a lifting shell moving in a vertical direction, a follower shell is rotatably arranged at the lower part of the lifting shell, a trigger block is horizontally arranged at the lower part of the follower shell, the trigger block can contact the inner wall of the container when extended and the pressure of the trigger block on the inner wall of the container is constant, a torque monitoring unit is arranged between the follower shell and the lifting shell, when the cleanliness of the inner wall of the container is detected, the lifting shell drives the follower shell to rotate through the torque monitoring unit, and the torque monitoring unit is used to monitor the friction between the trigger block and the inner wall of the container.

[0007] Preferably, a first extension portion is provided at the lower portion of the lifting shell, a second extension portion is provided at the upper portion of the follower shell, a first spring is provided between the first extension portion and the second extension portion, and a pressure sensor for detecting the elastic force of the first spring is provided at either end of the first spring.

[0008] Preferably, the cleaning unit also includes a cleaning shell which is sleeved on the periphery of the lifting shell and can drive the lifting shell to rotate. A sealing area and a detection area are arranged in the cleaning shell along the vertical direction. When the trigger block which rises and falls synchronously with the lifting shell is located in the sealing area, the trigger block is isolated from the outside world. When the trigger block is located in the detection area, the trigger block can extend from the follower shell and contact the inner wall of the container.

[0009] Preferably, a fan-shaped groove for the trigger block to pass through is opened on the side wall of the cleaning shell, and the fan-shaped groove constitutes a detection area. A sealing disk with a diameter the same as the diameter of the inner ring of the cleaning shell is fixedly arranged at the bottom of the follower shell. When the sealing disk is located above the fan-shaped groove, the sealing disk and the cleaning shell form a sealing area.

[0010] Preferably, a water injection pipe is vertically arranged in the cleaning shell, and the water injection pipe sequentially penetrates the lifting shell and the follower shell in the vertical direction and extends to the bottom of the cleaning shell, and the water injection pipe is used to discharge the cleaning liquid from the bottom of the cleaning shell.

[0011] Preferably, a plurality of rollers rotating along the radial direction of the cleaning shell are arranged around the axis of the cleaning shell at the bottom of the cleaning shell, and the rollers are in rolling cooperation with the bottom of the follower shell in the detection area.

[0012] Preferably, the cleaning unit also includes a self-cleaning unit for cleaning the trigger block and the cleaning shell. The self-cleaning unit includes a cleaning sleeve arranged above the cleaning shell. The cleaning shell can slide into the cleaning sleeve when it rises in the vertical direction. The cleaning sleeve is evenly distributed with multiple nozzles that can spray cleaning liquid.

[0013] Preferably, a lifting frame is arranged above the cleaning shell, the cleaning shell moves synchronously with the lifting frame in the vertical direction, and a driving unit for driving the cleaning shell to rotate is arranged on the lifting frame.

[0014] Preferably, a ventilation groove is opened in the follower shell, the trigger block is arranged in the ventilation groove for horizontal movement, a second spring is arranged in the ventilation groove, a lower pressure plate is fixedly arranged on the upper part of the second spring, and when the lower pressure plate descends, the trigger block slides out of the ventilation groove.

[0015] Preferably, a bellows sleeve is vertically arranged between the upper part of the lifting shell and the upper part of the cleaning shell, an air pump for inflating the bellows sleeve is arranged on the upper part of the bellows sleeve, and the bellows sleeve is communicated with the upper part of the ventilation groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a lifting shell and a follower shell, and a torque monitoring unit is provided between the lifting shell and the follower shell, so that when the cleaning unit detects the inner wall of the container, the lifting shell drives the follower shell to rotate through the torque monitoring unit, and the follower shell drives the trigger block to rotate synchronously, and the trigger block slides with the inner wall of the container. The lifting shell drives the follower shell to rotate while also driving the follower shell to rise in a vertical direction, so that the trigger block gradually rises in a spiral shape, so that the trigger block can completely sweep the inner wall of the container, and at the same time, a threshold range is preset for the torque monitoring unit. When the container is cleaned, if there is no oil stain in the container, during the process of the trigger block contacting the inner wall of the container, the value monitored by the torque monitoring unit is always within the threshold range. If there is oil stain on the inner wall of the container, when the trigger block passes the oil stain position, the friction coefficient between the trigger block and the inner wall of the container is greatly reduced. At this time, the torque monitored by the torque monitoring unit will suddenly drop, and the torque is lower than the threshold range. If this is the case, it means that the container is not cleaned and needs to be cleaned again. The present invention unifies the standard for detecting the cleanliness of the container, avoids the subjectivity existing in artificially detecting the cleanliness of the inner wall of the container, and realizes the accurate detection of the cleanliness inside the container.

[0017] 2. By setting a detection area and a sealing area in the cleaning shell, and fixing a sealing disk at the bottom of the follower shell, when the lifting shell drives the follower shell to rise and fall, the sealing disk can seal the trigger block in the sealing area, so that the trigger block will not come into contact with oil stains during the process of the cleaning shell cleaning the container, thereby ensuring the cleanliness of the trigger block, and further ensuring the accuracy of the trigger block in the subsequent detection of the cleanliness of the inner wall of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a three-dimensional schematic diagram of an automatic sampling device for an oily wastewater treatment system when cleaning a container.

[0019] Figure 2 The invention is a side view of an automatic sampling device for an oily wastewater treatment system when cleaning a container.

[0020] Figure 3 The invention is an automatic sampling device for an oily wastewater treatment system. Figure 2 Schematic cross-sectional view at AA in the middle.

[0021] Figure 4 The invention is an automatic sampling device for an oily wastewater treatment system. Figure 3 A local enlarged schematic diagram of point B in the middle.

[0022] Figure 5 It is a cutaway stereoscopic schematic diagram of a trigger block of an automatic sampling device for an oily wastewater treatment system of the present invention when it is in a detection area.

[0023] Figure 6 The invention is an automatic sampling device for an oily wastewater treatment system. Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0024] Figure 7 It is a cutaway stereoscopic schematic diagram of a trigger block in an automatic sampling device for an oily wastewater treatment system of the present invention when it is in a sealing area.

[0025] Figure 8 The invention discloses a cutaway stereoscopic schematic diagram of an automatic sampling device for an oily wastewater treatment system.

[0026] Fig. 9 The invention is an automatic sampling device for an oily wastewater treatment system. Figure 8 A partial enlarged schematic diagram of point D in the middle.

[0027] Fig.10 The invention is an automatic sampling device for an oily wastewater treatment system. Figure 8 A partial enlarged schematic diagram of point E in the middle.

[0028] Fig.11 It is a three-dimensional schematic diagram of an automatic sampling device for an oily wastewater treatment system of the present invention after removing a self-cleaning unit and a cleaning shell.

[0029] Fig.12 The invention is an automatic sampling device for an oily wastewater treatment system. Fig.11 A partial enlarged schematic diagram of point F in the middle.

[0030] The numbers in the figure are: 1. Container; 2. Cleaning unit; 21. Trigger block; 22. Follower shell; 221. Vent groove; 222. Second spring; 223. Lower pressure plate; 23. Lifting shell; 231. Bellows sleeve; 232. Air pump; 24. Torque monitoring unit; 241. First spring; 242. First extension; 243. Second extension; 25. Cleaning shell; 251. Cleaning brush; 252. Fan-shaped groove; 253. Sealing disk; 254. Water injection pipe; 255. Roller; 26. Self-cleaning unit; 261. Cleaning sleeve; 262. Nozzle; 263. First rotary drive; 264. Screw rod; 27. Lifting frame; 28. Drive unit; 281. Second rotary drive; 282. Gear; 283. Gear ring. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1-Figure 3 : An automatic sampling device for an oily wastewater treatment system, comprising a cleaning unit 2 for cleaning a container 1; the cleaning unit 2 comprises a lifting shell 23 that moves in a vertical direction, a follower shell 22 is rotatably arranged at the lower part of the lifting shell 23, a trigger block 21 is horizontally movably arranged at the lower part of the follower shell 22, the trigger block 21 can contact the inner wall of the container 1 when extended and the pressure of the trigger block 21 on the inner wall of the container 1 is constant, a torque monitoring unit 24 is arranged between the follower shell 22 and the lifting shell 23, when the cleanliness of the inner wall of the container 1 is detected, the lifting shell 23 drives the follower shell 22 to rotate through the torque monitoring unit 24, and the torque monitoring unit 24 is used to monitor the friction between the trigger block 21 and the inner wall of the container 1.

[0033] The container 1 is used for sampling oily wastewater. The automatic collection device has a sampling station and a cleaning station. The sampling station is provided with a sampling unit for driving the container 1 to rise and fall. The cleaning station is provided with a cleaning unit 2 for driving the container 1 to clean. The automatic collection device also includes a switching unit for driving the container 1 to switch between the sampling station and the cleaning station. During the collection process, it is more difficult to clean the oily wastewater collected by container 1 than to collect traditional wastewater, and it is difficult to make an accurate judgment on the cleanliness condition inside container 1. After the oily wastewater in container 1 is taken out, there must be some oil stains inside container 1. If the oil stains have color, the oil stains can be distinguished by visual receptors, thereby judging whether the oil stains in container 1 have been washed off. However, some oil stains are transparent, which makes it impossible for the visual receptors to make a correct judgment on the cleanliness condition inside container 1. After cleaning container 1, human intervention is still required, that is, touching the inner wall of container 1 with fingers, and judging whether there are oil stains remaining in container 1 by sliding between the fingers and the inner wall of container 1. Each time the test is performed, the human perception is subjective, and there are errors in each person's judgment criteria. Moreover, the same person may have different perceptions of whether there are oil stains in container 1 at different times, resulting in a large fluctuation in the standard for judging the cleanliness of container 1.

[0034] In order to avoid the above situation, the cleaning unit 2 in the automatic sampling device is redesigned so that after the cleaning unit 2 cleans the inner wall of the container 1, the cleaning unit 2 can self-check the cleaning status of the inner wall of the container 1, so that the detection standard is unified, avoiding the subjectivity in the manual detection of the cleanliness of the inner wall of the container 1, and realizing the accurate detection of the cleanliness of the container 1. The specific structure and working process of the cleaning unit 2 are as follows: First, when cleaning the container 1, first insert the cleaning unit 2 vertically into the container 1 from the opening of the container 1. The cleaning unit 2 continuously injects the cleaning liquid into the container 1 during the insertion process. The specific cleaning process of the cleaning unit 2 will be described below. This paragraph mainly describes the process of the cleaning unit 2 performing a self-inspection on the cleanliness of the container 1 after the cleaning unit 2 finishes cleaning the container 1. After the cleaning is completed, the cleaning unit 2 is first withdrawn from the container 1, and then the container 1 is turned over to pour out the water stains remaining in the container 1. Then the container 1 rotates back to the normal position, and the cleaning unit 2 descends again and is inserted into the container 1 from the opening of the container 1. When the cleaning unit 2 reaches the bottom of the container 1, the trigger block 21 horizontally moved on the follower shell 22 extends out and contacts the inner wall of the container 1. The pressure between the trigger block 21 and the inner wall of the container 1 is always constant after contact. When the inner wall of the container 1 is detected, the lifting shell 23 moves the follower shell through the torque monitoring unit 24. 22 is driven to rotate. When the rotation of the follower shell 22 encounters resistance, the lifting shell 23 and the follower shell 22 rotate relative to each other, and the torque monitoring unit 24 can monitor the torque change between the lifting shell 23 and the follower shell 22. The torque monitored by the torque monitoring unit 24 is directly proportional to the friction between the trigger block 21 and the inner wall of the container 1, that is, the greater the friction, the greater the torque, and conversely, the smaller the friction, the smaller the torque. The friction between the trigger block 21 and the inner wall of the container 1 can be determined by monitoring the torque. It is worth noting that when the lifting shell 23 drives the follower shell 22 to rotate through the torque monitoring unit 24, the trigger block 21 arranged on the follower shell 22 slides relative to the inner wall of the container 1. When all the oil stains on the inner wall of the container 1 are removed, the trigger block 21 slides relative to the inner wall of the container 1 and the friction force remains constant. The constant friction force means that the friction force fluctuates within a certain threshold range. This is because there are still some water stains on the side wall of the container 1. When the trigger block 21 slides with the side wall of the container 1, the friction coefficient is easily slightly reduced when the trigger block 21 passes the water stain position. The change in friction between the clean container 1 and the torque monitoring unit 24 sets a threshold range for the value monitored by the torque monitoring unit 24, so that the cleanliness of the inner wall of the container 1 can be accurately judged. If there is no oil stain on the inner wall of the container 1, when the trigger block 21 contacts the container 1, the value monitored by the torque monitoring unit 24 is always within the set threshold range. If there is oil stain on the inner wall of the container 1, when the trigger block 21 contacts the container 1, the friction coefficient of the trigger block 21 will be greatly reduced when passing the oil stain position, resulting in a significant reduction in the torque value monitored by the torque monitoring unit 24. If the detected torque value is lower than the threshold range, it means that the container 1 is not clean. When the follower shell 22 rotates with the lifting shell 23, the lifting shell 23 also drives the follower shell 22 to rise in the vertical direction, so that the trigger block 21 can completely sweep the side wall of the container 1, thus completing the comprehensive detection of the inner wall of the container 1.

[0035] By setting the lifting shell 23 and the follower shell 22, and setting a torque monitoring unit 24 between the lifting shell 23 and the follower shell 22, when the cleaning unit 2 detects the inner wall of the container 1, the lifting shell 23 drives the follower shell 22 to rotate through the torque monitoring unit 24, and the follower shell 22 drives the trigger block 21 to rotate synchronously. The trigger block 21 and the inner wall of the container 1 are slidably matched. The lifting shell 23 drives the follower shell 22 to rotate while also driving the follower shell 22 to rise in the vertical direction, so that the trigger block 21 gradually rises in a spiral shape, so that the trigger block 21 can completely clean the inner wall of the container 1. Sweep, and preset a threshold range for the torque monitoring unit 24 at the same time. When the container 1 is cleaned, if there is no oil stain in the container 1, when the trigger block 21 is in contact with the inner wall of the container 1, the value monitored by the torque monitoring unit 24 is always within the threshold range. If there is oil stain on the inner wall of the container 1, when the trigger block 21 passes the oil stain position, the friction coefficient between the trigger block 21 and the inner wall of the container 1 is greatly reduced. At this time, the torque monitored by the torque monitoring unit 24 will suddenly drop, and the torque is lower than the threshold range. If this is the case, it means that the container 1 is not clean and needs to be cleaned again. The present invention unifies the standard for detecting the cleanliness of the container 1, avoids the subjectivity in manually detecting the cleanliness of the inner wall of the container 1, and realizes the accurate detection of the cleanliness of the container 1.

[0036] Reference Fig.12 A first extension portion 242 is provided at the lower portion of the lifting shell 23, a second extension portion 243 is provided at the upper portion of the follower shell 22, a first spring 241 is provided between the first extension portion 242 and the second extension portion 243, and a pressure sensor for detecting the elastic force of the first spring 241 is provided at either end of the first spring 241.

[0037] When the inner wall of the container 1 is detected, the trigger block 21 contacts the inner wall of the container 1, and the lifting shell 23 rotates first. The lifting shell 23 squeezes the second extension part 243 through the first extension part 242 and the first spring 241, so that the second extension part 243 drives the follower shell 22 to rotate. Since there is friction when the trigger block 21 contacts the inner wall of the container 1, the first spring 241 will shrink. When the elastic force of the first spring 241 is greater than the friction between the trigger block 21 and the container 1, the trigger block 21 can slide relative to the container 1. When there is oil stain on the side wall of the container 1, the friction coefficient of the trigger block 21 will be greatly reduced when passing through the oil stain, thereby causing the compression of the first spring 241 to suddenly decrease, so that the elastic force detected by the pressure sensor suddenly decreases. The elastic force corresponds to the torque mentioned above, that is, the change in the friction between the trigger block 21 and the container 1 is judged by the change in the elastic force of the first spring 241.

[0038] Reference Figure 7 and Figure 8: The cleaning unit 2 also includes a cleaning shell 25 which is sleeved on the outer periphery of the lifting shell 23 and can drive the lifting shell 23 to rotate. A sealing area and a detection area are arranged in the cleaning shell 25 along the vertical direction. When the trigger block 21 which rises and falls synchronously with the lifting shell 23 is located in the sealing area, the trigger block 21 is isolated from the outside world. When the trigger block 21 is located in the detection area, the trigger block 21 can extend from the follower shell 22 and contact the inner wall of the container 1.

[0039] Cleaning brushes 251 are evenly arranged on the outer wall of the cleaning shell 25. When the cleaning shell 25 is extended into the container 1, the cleaning shell 25 rotates so that the cleaning brush 251 arranged on the cleaning shell 25 cleans the inner wall of the container 1. However, when the cleaning shell 25 is extended into the container 1 with a large amount of oil, the follower shell 22 and the trigger block 21 will extend into the container 1 together with the cleaning shell 25. If the trigger block 21 is not isolated, when the cleaning shell 25 cleans the oil in the container 1, the oil will adhere to the trigger block 21, so that the outer periphery of the trigger block 21 is covered. A large amount of oil stains leads to large deviations in subsequent detection results. In order to prevent the trigger block 21 from being contaminated by oil when the cleaning shell cleans the container 1, a sealing area and a detection area are set for the cleaning shell. When the cleaning shell 25 cleans the container 1, the trigger block 21 and the follower block are located in the sealing area of ​​the cleaning shell 25. At this time, the oil in the container 1 will not contact the trigger block 21. After the container 1 is cleaned, the lifting block drives the trigger block 21 to descend, so that the trigger block 21 moves to the detection area, and the trigger block 21 can be smoothly extended from the follower shell 22 and contact the inner wall of the container 1.

[0040] Reference Figure 7 , Figure 8 and Fig.11 : A fan-shaped groove 252 is provided on the side wall of the cleaning shell 25 for the trigger block 21 to pass through, and the fan-shaped groove 252 constitutes a detection area. A sealing disk 253 with a diameter the same as the inner ring diameter of the cleaning shell 25 is fixedly arranged at the bottom of the follower shell 22. When the sealing disk 253 is located above the fan-shaped groove 252, the sealing disk 253 and the cleaning shell 25 form a sealing area.

[0041] The sealing disk 253 is located below the trigger block 21. When the sealing disk 253 rises to the top of the fan-shaped groove 252 along with the follower shell 22, the sealing disk 253 and the cleaning shell 25 form a sealing area. Only then can the cleaning shell 25 clean the inside of the container 1. The sealing disk 253 seals the trigger block 21 in the cleaning shell 25, so that the trigger block 21 is isolated, ensuring that the trigger block 21 will not be contaminated by oil during the cleaning process of the cleaning shell 25.

[0042] Reference Figure 3-Figure 5A water injection pipe 254 is vertically arranged in the cleaning shell 25 , and the water injection pipe 254 passes through the lifting shell 23 and the follower shell 22 in sequence along the vertical direction and extends to the bottom of the cleaning shell 25 , and the water injection pipe 254 is used to discharge the cleaning liquid from the bottom of the cleaning shell 25 .

[0043] When the cleaning shell 25 cleans the inner wall of the container 1 through the cleaning brush 251 , the water injection pipe 254 can simultaneously inject cleaning liquid into the container 1 , thereby improving the cleaning effect of the cleaning shell 25 on the container 1 .

[0044] Reference Figure 4 and Figure 7 A plurality of rollers 255 are arranged at the bottom of the cleaning shell 25 around the axis of the cleaning shell 25 and rotate along the radial direction of the cleaning shell 25. The rollers 255 roll with the bottom of the follower shell 22 in the detection area.

[0045] If the roller 255 is not provided, the friction coefficient between the follower housing 22 and the bottom of the detection area is relatively high. In order to reduce the frictional force of the bottom of the detection area on the follower housing 22 when rotating, the roller 255 is provided at the bottom of the detection area so that the follower housing 22 can rotate more easily.

[0046] Reference Figure 3 and Figure 5 : The cleaning unit 2 also includes a self-cleaning unit 26 for cleaning the trigger block 21 and the cleaning shell 25. The self-cleaning unit 26 includes a cleaning sleeve 261 arranged above the cleaning shell. The cleaning shell 25 can slide into the cleaning sleeve 261 when it rises in the vertical direction. A plurality of nozzles 262 that can spray cleaning liquid are evenly distributed on the cleaning sleeve 261.

[0047] The self-cleaning unit 26 also includes a first rotary driver 263 and a screw rod 264. The screw rod 264 is vertically rotatably arranged in the cleaning sleeve 261. The output end of the first rotary driver 263 is fixedly connected to the screw rod 264. A lifting frame 27 that rises and falls synchronously with the cleaning shell 25 is arranged on the upper part of the cleaning shell 25. The screw rod 264 penetrates the lifting frame 27 and cooperates with the thread of the lifting frame 27. Every time the trigger block 21 contacts the inner wall of the container 1, the cleaning shell 25 drives the cleaning block to rise and slide into the cleaning sleeve 261, and then the nozzle 262 sprays the cleaning liquid, and the cleaning liquid cleans the trigger block 21. The time for the nozzle 262 to spray the cleaning liquid can be set according to actual conditions. After the rated time is reached, the nozzle 262 switches to spraying clean water to clean the trigger block 21.

[0048] Reference Figure 5 and Fig. 9 A lifting frame 27 is arranged above the cleaning shell 25, and the cleaning shell 25 moves synchronously with the lifting frame 27 along the vertical direction. A driving unit 28 for driving the cleaning shell 25 to rotate is arranged on the lifting frame 27.

[0049] The driving unit 28 includes a second rotation driver 281, a gear 282 and a gear ring 283. The gear ring 283 is fixedly arranged on the upper part of the cleaning shell 25, and the gear ring 283 is rotatably arranged on the lifting frame 27. A gear 282 is meshed on one side of the gear ring 283. The second rotation driver 281 is arranged on the lifting frame 27 and drives the gear 282. The second rotation driver 281 is preferably a servo motor.

[0050] Reference Figure 6 , Figure 7 and Fig.10 A ventilation groove 221 is provided in the follower shell 22, and the trigger block 21 is arranged in the ventilation groove 221 for horizontal movement. A second spring 222 is arranged in the ventilation groove 221, and a lower pressure plate 223 is fixedly provided on the upper part of the second spring 222. When the lower pressure plate 223 descends, the trigger block 21 slides out of the ventilation groove 221.

[0051] Reference Figure 8 and Fig.11 A bellows sleeve 231 is vertically arranged between the upper part of the lifting shell 23 and the upper part of the cleaning shell 25, and an air pump 232 for inflating the bellows sleeve 231 is arranged on the upper part of the bellows sleeve 231, and the bellows sleeve 231 is communicated with the upper part of the ventilation groove 221.

[0052] The lifting shell 23 can only move along the height direction of the cleaning shell 25, and the lifting shell 23 can only rotate synchronously with the cleaning shell 25 when the cleaning shell 25 rotates. After the container 1 is cleaned, the air pump 232 inflates the bellows sleeve 231, so that the bellows sleeve 231 gradually stretches, and the lifting sleeve drives the follower sleeve to descend together. At this time, since the lower pressure plate 223 and the second spring 222 are arranged in the ventilation groove 221, under the elastic force of the second spring 222, the trigger block 21 arranged in the ventilation groove 221 will not slide out and contact the inner wall of the cleaning shell 25, reducing the sliding wear between the trigger block 21 and the inner wall of the cleaning shell 25. When the follower shell 22 descends to the detection area and contacts the bottom of the detection area, the air pump 232 continues to inflate the bellows sleeve 231, and the bellows sleeve 231 is no longer stretched. The lower pressure plate 223 presses the second spring 222, so that the air at the bottom of the ventilation groove 221 pushes the trigger block 21 out. After the trigger block 21 is self-cleaned by the self-cleaning unit 26, the air pump 232 extracts the air in the bellows sleeve 231, and the second spring 222 first pushes the lower pressure plate 223 to reset, and the trigger block 21 slides into the ventilation groove 221, and then the bellows sleeve 231 begins to shrink, and the lifting shell 23 drives the trigger block 21 to rise to the sealing area.

[0053] Working principle: After cleaning, the cleaning unit 2 is first withdrawn from the container 1, and then the container 1 is turned over to pour out the water stains remaining in the container 1, and then the container 1 is turned back to the normal position, and the cleaning unit 2 is lowered again and inserted into the container 1 from the opening of the container 1. When the cleaning unit 2 reaches the bottom of the container 1, the trigger block 21 arranged on the follower shell 22 moves horizontally and extends out and contacts the inner wall of the container 1. The pressure of the trigger block 21 and the inner wall of the container 1 is always constant after contact. When the inner wall of the container 1 is detected, the lifting shell 23 moves the follower shell 22 through the torque monitoring unit 24. The movable shell 22 is driven to rotate. When the rotation of the follower shell 22 encounters resistance, the lifting shell 23 and the follower shell 22 rotate relative to each other, and the torque monitoring unit 24 can monitor the torque change between the lifting shell 23 and the follower shell 22. The torque monitored by the torque monitoring unit 24 is directly proportional to the friction between the trigger block 21 and the inner wall of the container 1, that is, the greater the friction, the greater the torque, and conversely, the smaller the friction, the smaller the torque. The friction between the trigger block 21 and the inner wall of the container 1 can be determined by monitoring the torque. It is worth noting that when the lifting shell 23 drives the follower shell 22 to rotate through the torque monitoring unit 24, the trigger block 21 arranged on the follower shell 22 slides relative to the inner wall of the container 1. When all the oil stains on the inner wall of the container 1 are removed, the trigger block 21 slides relative to the inner wall of the container 1 and the friction force remains constant. The constant friction force means that the friction force fluctuates within a certain threshold range. This is because there are still some water stains on the side wall of the container 1. When the trigger block 21 slides with the side wall of the container 1, the friction coefficient is easily slightly reduced when the trigger block 21 passes the water stain position. The change in friction between the clean container 1 and the torque monitoring unit 24 sets a threshold range for the value monitored by the torque monitoring unit 24, so that the cleanliness of the inner wall of the container 1 can be accurately judged. If there is no oil stain on the inner wall of the container 1, when the trigger block 21 contacts the container 1, the value monitored by the torque monitoring unit 24 is always within the set threshold range. If there is oil stain on the inner wall of the container 1, when the trigger block 21 contacts the container 1, the friction coefficient of the trigger block 21 will be greatly reduced when passing the oil stain position, resulting in a significant reduction in the torque value monitored by the torque monitoring unit 24. If the detected torque value is lower than the threshold range, it means that the container 1 is not clean. When the follower shell 22 rotates with the lifting shell 23, the lifting shell 23 also drives the follower shell 22 to rise in the vertical direction, so that the trigger block 21 can completely sweep the side wall of the container 1, thus completing the comprehensive detection of the inner wall of the container 1.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An automatic sampling device for an oily wastewater treatment system, comprising a cleaning unit (2) for cleaning a container (1); It is characterized in that The cleaning unit (2) comprises a lifting shell (23) that moves in a vertical direction, a follower shell (22) that is rotatably arranged at the bottom of the lifting shell (23), a trigger block (21) that is horizontally movably arranged at the bottom of the follower shell (22), the trigger block (21) being able to contact the inner wall of the container (1) when extended, and the pressure of the trigger block (21) on the inner wall of the container (1) being constant, a torque monitoring unit (24) being arranged between the follower shell (22) and the lifting shell (23), when the cleanliness of the inner wall of the container (1) is detected, the lifting shell (23) drives the follower shell (22) to rotate through the torque monitoring unit (24), and the torque monitoring unit (24) is used to monitor the friction between the trigger block (21) and the inner wall of the container (1).

2. The automatic sampling device for oily wastewater treatment system according to claim 1, characterized in that: A first extension portion (242) is provided at the lower portion of the lifting shell (23), a second extension portion (243) is provided at the upper portion of the follower shell (22), a first spring (241) is provided between the first extension portion (242) and the second extension portion (243), and a pressure sensor for detecting the elastic force of the first spring (241) is provided at either end of the first spring (241).

3. The automatic sampling device for oily wastewater treatment system according to claim 1, characterized in that: The cleaning unit (2) further comprises a cleaning shell (25) which is sleeved on the outer periphery of the lifting shell (23) and can drive the lifting shell (23) to rotate. A sealing area and a detection area are arranged in the cleaning shell (25) along the vertical direction. When the trigger block (21) which is synchronously lifted and lowered with the lifting shell (23) is located in the sealing area, the trigger block (21) is isolated from the outside. When the trigger block (21) is located in the detection area, the trigger block (21) can extend from the follower shell (22) and contact the inner wall of the container (1).

4. The automatic sampling device for oily wastewater treatment system according to claim 3 is characterized in that: A fan-shaped groove (252) for the trigger block (21) to pass through is formed on the side wall of the cleaning shell (25), and the fan-shaped groove (252) constitutes a detection area. A sealing disk (253) having a diameter identical to that of the inner ring of the cleaning shell (25) is fixedly arranged at the bottom of the follower shell (22). When the sealing disk (253) is located above the fan-shaped groove (252), the sealing disk (253) and the cleaning shell (25) form a sealing area.

5. The automatic sampling device for oily wastewater treatment system according to claim 3 is characterized in that: A water injection pipe (254) is vertically arranged in the cleaning shell (25). The water injection pipe (254) sequentially penetrates the lifting shell (23) and the follower shell (22) in a vertical direction and extends to the bottom of the cleaning shell (25). The water injection pipe (254) is used to discharge cleaning liquid from the bottom of the cleaning shell (25).

6. The automatic sampling device for oily wastewater treatment system according to claim 3, characterized in that: A plurality of rollers (255) are arranged at the bottom of the cleaning shell (25) around the axis of the cleaning shell (25) and rotate in the radial direction of the cleaning shell (25). The rollers (255) roll in cooperation with the bottom of the follower shell (22) in the detection area.

7. The automatic sampling device for oily wastewater treatment system according to claim 3, characterized in that: The cleaning unit (2) further comprises a self-cleaning unit (26) for cleaning the trigger block (21) and the cleaning shell (25); the self-cleaning unit (26) comprises a cleaning sleeve (261) arranged above the cleaning shell; the cleaning shell (25) can slide into the cleaning sleeve (261) when rising in a vertical direction; a plurality of nozzles (262) capable of spraying cleaning liquid are evenly distributed on the cleaning sleeve (261).

8. The automatic sampling device for oily wastewater treatment system according to claim 3, characterized in that: A lifting frame (27) is arranged above the cleaning shell (25), and the cleaning shell (25) moves synchronously with the lifting frame (27) in a vertical direction. A driving unit (28) for driving the cleaning shell (25) to rotate is arranged on the lifting frame (27).

9. The automatic sampling device for oily wastewater treatment system according to claim 1, characterized in that: A vent groove (221) is provided in the follower housing (22), and the trigger block (21) is arranged in the vent groove (221) so as to move in a horizontal direction. A second spring (222) is arranged in the vent groove (221), and a lower pressure plate (223) is fixedly arranged on the upper part of the second spring (222). When the lower pressure plate (223) descends, the trigger block (21) slides out of the vent groove (221) and contacts the inner wall of the container (1).

10. The automatic sampling device for oily wastewater treatment system according to claim 9, characterized in that: A bellows sleeve (231) is vertically arranged between the upper portion of the lifting shell (23) and the upper portion of the cleaning shell (25), an air pump (232) for inflating the bellows sleeve (231) is arranged on the upper portion of the bellows sleeve (231), and the bellows sleeve (231) is communicated with the upper portion of the ventilation groove (221).

Images