Non-metal pipeline surface micro-damage sampling device and non-metal pipeline surface micro-damage sampling method

Abstract

The invention discloses a nonmetal pipeline surface micro-damage sampling device and method, and belongs to the technical field of pipeline surface sampling. A nonmetal pipeline surface micro-damage sampling device comprises a working box and further comprises two sets of supporting and limiting seats fixedly connected to the bottom of the working box, and a collecting cavity is formed between the two sets of supporting and limiting seats; the collecting frame is arranged in the collecting cavity, a sealing plate is connected to the collecting frame in a sliding mode and used for blocking or unblocking the opening end of the collecting frame, a scraping mechanism is arranged in the collecting frame, and when the opening of the collecting frame is unblocked, the working end of the scraping mechanism can extend out of the collecting frame to abut against the outer wall of the pipeline; a driving part for driving the scraping mechanism to reciprocate is arranged in the working box; according to the scraping mechanism, the sampling thickness can be better controlled, only the outer surface of the sampled pipeline is scraped, the damage degree of the pipeline is kept within a safety range, and therefore the influence on the structural integrity of the pipeline is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline surface sampling, and in particular to a non-metallic pipeline surface micro-loss sampling device and method. Background Art

[0002] With the steady implementation and in-depth promotion of the national "coal to gas" project, urban gas has flourished. Polyethylene (PE) pipes have the advantages of long life, strong corrosion resistance, good toughness, light weight, convenient transportation, and low construction cost, making it the best choice for urban pipe network systems. The polyethylene pipes used for urban gas have been widely used in densely populated areas due to their convenience and economy. However, once these pipes fail, serious accidents may occur, posing a huge threat to the lives and property safety of urban residents. The design life of polyethylene gas pipelines is 50 years, and the earliest polyethylene pipelines put into use are close to the design life. Therefore, regular inspection and monitoring of pipeline conditions are very necessary.

[0003] Regarding pipeline surface sampling, the national standard GBT 43922-2024 "Inspection and Evaluation of Polyethylene Pipelines" clearly stipulates: "Pipeline surface damage depth exceeds 10% of the wall thickness or 4mm and requires repair. The "Polyethylene (PE) Public Pipeline Periodic Inspection Rules" (DB52 / T1602-2021) stipulates that when conducting oxidation induction time tests, the sampling should be selected from the outer surface of the pipe. The sampling thickness shall not exceed 10% of the pipe wall thickness and shall not exceed 4 mm to avoid affecting the strength of the pipe body."

[0004] In the prior art, it is usually necessary to take samples from the surface of an already used buried gas pipeline, and then conduct a subsequent oxidation induction time test on the sampled samples. Since the sampling thickness cannot be well controlled and is easily exceeded the prescribed sampling thickness, thus affecting the structural integrity of the pipeline, a section of the pipeline is usually directly cut off and then samples are taken from the cut pipeline. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the sampling thickness cannot be controlled when sampling pipelines, and it is easy to exceed the specified sampling thickness, making it difficult to directly sample in-service pipelines, and to propose a non-metallic pipeline surface micro-damage sampling device and method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A non-metallic pipeline surface micro-damage sampling device includes a working box, and also includes: two groups of support and limit seats, which are respectively fixedly connected to the bottom of the working box, and a collection chamber is formed between the two groups of support and limit seats; a collection frame that passes through the top and the bottom, and is arranged in the collection chamber, wherein a sealing plate is slidably connected to the collection frame, and is used to seal or unseal the opening end of the collection frame, and a scraping mechanism is arranged in the collection frame, when the opening of the collection frame is unsealed, the working end of the scraping mechanism can extend to the outside of the collection frame and abut against the outer wall of the pipeline, and a driving part for driving the scraping mechanism to reciprocate is arranged in the working box; a purge or collection mechanism is arranged on the cleaning end of the scraping mechanism, wherein when the driving part drives the working end of the scraping mechanism to reciprocate, the purge or collection mechanism can purge or collect the pipeline surface.

[0008] In order to facilitate the reciprocating movement of the scraping mechanism, preferably, the driving part includes a movable block slidably connected to the working box, a first telescopic member is fixedly connected to the movable block, the scraping mechanism is arranged at the working end of the first telescopic member, and a through hole connected to the collection frame is opened on the working box, and the scraping mechanism extends into the through hole.

[0009] In order to facilitate sampling of the pipeline, the scraping mechanism further includes a scraper, which is fixedly connected to the first telescopic member, and the purging or collecting mechanism is arranged on the side wall of the scraper, and the output end of the purging or collecting mechanism faces the side wall of the scraper.

[0010] In order to facilitate the cleaning of impurities on the scraper surface and water stains remaining on the pipeline, and also to be able to collect samples after scraping by the scraper, preferably, the purging or collecting mechanism includes: a mounting box with a cavity inside, wherein the mounting box is fixedly connected to the scraper, a through hole is opened on the mounting box, and the working end of the through hole faces the side wall of the scraper, a gas pipeline is fixedly connected to the mounting box, and a three-way valve is installed on the gas pipeline; a limit box fixedly connected to the working box, wherein a support plate is fixedly connected to the limit box, and a collection box is detachably connected to the limit box, An opening is provided at the bottom of the collecting box, and a filter is provided on the opening, the outside of the filter is abutted against the top of the support plate, and a reflux chamber is formed between the support plate and the collecting box, a flow hole is provided on the side wall of the collecting box, and an air intake pipe connected to the flow hole is connected to the side wall of the limit box, and the air intake pipe is fixedly connected to the first channel on the three-way valve, a first negative pressure pump and a second negative pressure pump are respectively provided in the working box, the gas delivery pipeline is connected to the reflux chamber, and the input end of the first negative pressure pump is connected to the limit box through a pipeline, and the output end of the second negative pressure pump is fixedly connected to the second channel on the three-way valve through a pipeline.

[0011] In order to facilitate cleaning of the pipeline surface, preferably, a fixing plate is fixedly connected to the support limit seat, a liquid spraying plate is slidably connected to the fixing plate, and a liquid spraying hole is opened on the liquid spraying plate, and the working end of the liquid spraying hole faces the pipeline surface.

[0012] In order to improve the cleaning effect of the liquid spray plate, preferably, movable rods are respectively provided at both ends of the liquid spray plate, and the two groups of the movable rods are respectively slidably connected to the fixed plate, and a spring is sleeved on the movable rod, and the two ends of the spring are respectively abutted against the liquid spray plate and the fixed plate, and a rotating shaft is rotatably connected to the working box, and a cam is fixedly connected to the rotating shaft, and the first group of movable rods are extended to the outside of the fixed plate and a pressure plate is provided, and the pressure plate is abutted against the cam, and a booster cylinder is fixedly connected to the outer wall of the support limit seat, and the first group of movable rods are extended to the inside of the booster cylinder and a piston is provided, and the piston is in contact with the inner wall of the booster cylinder, and an air inlet connecting pipe and an air outlet connecting pipe are respectively provided on the booster cylinder, and a one-way valve is provided on the air inlet connecting pipe and the air outlet connecting pipe, and the air outlet connecting pipe is connected to the liquid spray plate.

[0013] In order to facilitate spraying the cleaning agent on the sampling pipeline, preferably, a cleaning box is fixedly connected to the working box, a connecting rod is rotatably connected to the cleaning box, a stirring paddle is fixedly connected to the outer wall of the connecting rod, and the stirring paddle is arranged in the cavity of the cleaning box, and a first water pump is arranged on the working box, the input end of the first water pump is connected to the cleaning box through a pipeline, and the output end of the first water pump is fixedly connected to the spray plate through a telescopic tube.

[0014] In order to facilitate the rotation of the rotating shaft, preferably, a transmission disk is provided in the working box, and the two sides of the transmission disk are respectively connected to the telescopic tubes, the rotating shaft is rotatably connected to the transmission disk, and a turbine sheet is fixedly connected to the rotating shaft, and the turbine sheet is arranged in the transmission disk, an auxiliary gear is fixedly connected to the connecting rod, and a main gear is fixedly connected to the rotating shaft, and the main gear is meshed with the auxiliary gear.

[0015] In order to facilitate flushing of the cleaning agent on the pipeline, preferably, a second water pump is provided in the working box, and a liquid storage tank is fixedly connected to the working box, the input end of the second water pump is connected to the liquid storage tank through a pipeline, the output end of the second water pump is fixedly connected to the liquid spray plate through a pipeline, and a one-way valve is provided on the pipeline.

[0016] A non-metallic pipeline surface micro-damage sampling method, the operation steps are as follows:

[0017] Step 1: Place two sets of support and limit seats on the surface of the non-metallic pipe respectively, and make the bottom of the support and limit seat abut against the surface of the pipe;

[0018] Step 2: spray the cleaning agent toward the pipeline surface through the liquid spray plate and let the cleaning agent stand;

[0019] Step 3: Spray clean water source toward the cleaning agent on the pipe surface through the spray plate to clean the pipe surface;

[0020] Step 4: Unseal the opening of the collection frame, start the purge mechanism in the purge or collection mechanism, and drive the purge mechanism to move back and forth in the cavity of the collection frame through the driving unit to purge and dry the water stains remaining on the surface of the pipeline;

[0021] Step 5: Scrape the dried pipe surface through a scraping mechanism, and collect the scraped sample through a collecting mechanism in a purge or collection mechanism.

[0022] Compared with the prior art, the present invention provides a non-metallic pipeline surface micro-damage sampling device and method, which has the following beneficial effects:

[0023] 1. The non-metallic pipeline surface micro-damage sampling device can better control the sampling thickness through the scraping mechanism, and only scrapes the surface of the sampled pipeline, thereby preventing the structural integrity of the pipeline from being affected;

[0024] 2. The non-metallic pipeline surface micro-damage sampling device can ensure that the cleaning agent is accurately sprayed on the area that needs to be cleaned through the spray holes on the spray plate, so that the working efficiency and accuracy of the scraper can be improved;

[0025] 3. The non-metallic pipeline surface micro-damage sampling device delivers gas to the liquid spray plate through the gas outlet connection pipe, so that the gas is mixed with the cleaning agent to form mixed bubbles. These bubbles can enhance the cleaning effect of the cleaning agent when they explode, and help break the adhesion between the dirt and the surface;

[0026] 4. The non-metallic pipeline surface micro-damage sampling device can avoid the contamination of the sample by dirt during the sampling process after cleaning the dirt on the sampled pipeline through the liquid spray plate, thereby more truly reflecting the actual situation of the pipeline, and the clean surface is helpful to obtain representative samples, making the sampling results more reliable;

[0027] 5. The non-metallic pipeline surface micro-damage sampling device can clean the impurities on the scraper by spraying gas from the through hole on the installation box, thereby improving the purity of the sample during the sampling process.

[0028] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The scraping mechanism in the present invention can better control the sampling thickness and only scrape the surface of the sampled pipe to keep the degree of damage within a safe range, thereby preventing the structural integrity of the pipe from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1A schematic diagram of the axonometric structure of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention Figure 1 ;

[0030] Figure 2 A schematic diagram of the axonometric structure of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention Figure 2 ;

[0031] Figure 3 This is a partial structural schematic diagram of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention;

[0032] Figure 4 A schematic diagram of the cross-section of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention Figure 1 ;

[0033] Figure 5 A schematic diagram of the cross-section of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention Figure 2 ;

[0034] Figure 6 A schematic diagram of the interior of a limit box of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention;

[0035] Figure 7 This is a schematic diagram of the interior of a collection box of a non-metallic pipeline surface micro-damage sampling device proposed by the present invention.

[0036] In the figure: 1, working box; 2, supporting limit seat; 3, collecting frame; 4, sealing plate; 5, fixing plate; 6, spray plate; 7, spray hole; 8, movable rod; 9, pressing plate; 10, cam; 11, booster cylinder; 12, mounting plate; 13, screw rod; 14, movable block; 15, motor; 16, first telescopic member; 17, scraper; 18, mounting box; 19, second telescopic member; 20, rotating shaft; 21, main gear; 22, transmission plate; 23. Turbine blade; 24. Connecting rod; 25. Auxiliary gear; 26. Cleaning box; 27. Agitator; 28. First water pump; 29. ​​Liquid storage tank; 30. Second water pump; 31. Limit box; 32. Support plate; 33. Collecting box; 34. Flow hole; 35. Filter; 36. Telescopic pipe; 37. Air outlet connecting pipe; 38. First negative pressure pump; 39. Second negative pressure pump; 40. Gas pipeline; 41. Three-way valve; 42. Inlet pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Example:

[0040] Reference Figure 1-Figure 7 A non-metallic pipeline surface micro-damage sampling device includes a working box 1, and also includes: two groups of support and limit seats 2, which are respectively fixedly connected to the bottom of the working box 1, and a collecting chamber is formed between the two groups of support and limit seats 2. The two groups of support and limit seats 2 can be placed on the sampled pipelines respectively, and downward pressure is applied to the working box 1, so that the two groups of support and limit seats 2 on the working box 1 can stably resist the outer wall of the sampled pipeline.

[0041] In order to improve the stability during sampling, a collection frame 3 is provided in the collection chamber, which is connected to the collection frame 3 with a sealing plate 4 for blocking or unsealing the opening end of the collection frame 3. A scraping mechanism is provided in the collection frame 3. When the opening of the collection frame 3 is unsealed, the working end of the scraping mechanism can extend to the outside of the collection frame 3 and abut against the outer wall of the pipeline, and a driving part for driving the scraping mechanism to move back and forth is provided in the working box 1;

[0042] A second telescopic member 19 is installed on the support limit seat 2, and the sealing plate 4 is fixedly connected to the working end of the second telescopic member 19. The second telescopic member 19 can drive the sealing plate 4 to slide on the collecting frame 3, thereby sealing or unsealing the open end of the collecting frame 3 to prevent external impurities from entering the working box 1 and affecting the scraping mechanism.

[0043] The working end of the scraping mechanism can extend to the outside of the collecting frame 3 and abut against the outer wall of the pipeline, and the driving part drives the scraping mechanism to move back and forth, so that the scraping mechanism scrapes and samples the surface of the sampled pipeline.

[0044] Furthermore, the driving part includes a movable block 14 slidably connected in the working box 1, a first telescopic member 16 is fixedly connected to the movable block 14, a scraping mechanism is arranged at the working end of the first telescopic member 16, and a through hole connected to the collecting frame 3 is opened on the working box 1, and the scraping mechanism extends into the through hole.

[0045] A mounting plate 12 is also installed in the working box 1, and a screw rod 13 is rotatably connected to the mounting plate 12, and a movable block 14 is threadedly connected to the screw rod 13, and an extension rod is arranged between the two sets of mounting plates 12, which is used to limit the position of the movable block 14 so that it can only reciprocate and translate, and a motor 15 is arranged on the mounting plate 12, which is used to drive the screw rod 13 to rotate. When the screw rod 13 rotates, the movable block 14 will drive the scraping mechanism to reciprocate in the collecting frame 3.

[0046] Furthermore, the scraping mechanism includes a scraper 17 which is fixedly connected to the first telescopic member 16 , and a purging or collecting mechanism is arranged on a side wall of the scraper 17 , and an output end of the purging or collecting mechanism faces the side wall of the scraper 17 .

[0047] The telescopic part can use an electric telescopic rod to drive the connecting parts to telescopically move, and then drive the scraper 17 to rise and fall in the working box 1. In order to better control the position of the scraper 17 and prevent the scraper 17 from exceeding the specified sampling thickness, a position feedback sensor is provided on the telescopic part, for example (such as an encoder or a limit switch) to monitor the position of the telescopic part in real time. When the telescopic end contacts the object (the sampled pipe), the position feedback sensor can detect its position change and send a signal, and control the telescopic part to stop working, thereby allowing the scraper 17 to scrape the surface of the sampled pipe.

[0048] The encoder mentioned above is mainly installed on the driving part of the telescopic part to monitor the telescopic position of the rod in real time. When the set maximum telescopic range is reached, a stop signal can be issued. The limit switch is mainly a mechanical limit switch installed at the end of the telescopic part or a specific position. When the telescopic end of the telescopic part contacts the object (the sampled pipe), the limit switch is triggered, cutting off the power supply or stopping the telescopic part from working. The sampling thickness can be better controlled, and only the surface of the sampled pipe is scraped, thereby preventing the structural integrity of the pipe from being affected.

[0049] In addition, a collision sensor (such as an ultrasonic sensor or an infrared sensor) is used to detect the object (the sampled pipe) in front of the telescopic end of the telescopic member. For example, when the ultrasonic sensor sends out an ultrasonic signal, it measures the reflected wave to determine the distance to the object. When the distance is less than a preset value, the control system stops the telescopic member from working.

[0050] The infrared sensor can also emit and receive infrared rays to detect the presence of an object in front (the sampled pipe). If an object (the sampled pipe) is detected, the sensor will send a signal to stop the movement of the telescopic member. The above are all feasible solutions and can be selected according to needs.

[0051] In order to facilitate the cleaning of dirt on the outside of the sampled pipe and improve the accuracy of the scraper 17, a fixed plate 5 is fixedly connected to the support limit seat 2, and a spray plate 6 is slidably connected to the fixed plate 5. The spray plate 6 is provided with a spray hole 7, and the working end of the spray hole 7 faces the pipe surface.

[0052] Through the liquid spray holes 7 on the liquid spray plate 6, it can be ensured that the cleaning agent is accurately sprayed on the area that needs to be cleaned, so that the working efficiency and accuracy of the scraper 17 can be improved.

[0053] In addition, in order to increase the spray range of the spray plate 6, movable rods 8 are respectively provided at both ends of the spray plate 6, and two groups of movable rods 8 are respectively slidably connected to the fixed plate 5, and a spring is sleeved on the movable rod 8, and the two ends of the spring are respectively abutted against the spray plate 6 and the fixed plate 5, and a rotating shaft 20 is rotatably connected to the working box 1, and a cam 10 is fixedly connected to the rotating shaft 20, and a first group of movable rods 8 are extended to the outside of the fixed plate 5 and a pressure plate 9 is provided, and the pressure plate 9 is abutted against the cam 10, and a booster cylinder 11 is fixedly connected to the outer wall of the support limit seat 2, and the first group of movable rods 8 are extended to the booster cylinder 11 and a piston is provided, and the piston is in contact with the inner wall of the booster cylinder 11, and an air inlet connecting pipe and an air outlet connecting pipe 37 are respectively provided on the booster cylinder 11, and a one-way valve is provided on the air inlet connecting pipe and the air outlet connecting pipe 37, and the air outlet connecting pipe 37 is connected to the spray plate 6.

[0054] When the rotating shaft 20 rotates, it can drive the cam 10 to rotate synchronously, so that the outer wall of the cam 10 is against the pressure plate 9, so that the pressure plate 9 drives the two groups of movable rods 8 to move back and forth on the fixed plate 5, and then the spray plate 6 moves back and forth between the two groups of fixed plates 5, thereby increasing the spray range of the spray plate 6. In addition, during this process, the booster cylinder 11 will continue to generate gas, and then transport the gas to the spray plate 6 through the air outlet connecting pipe 37, so that the gas is mixed with the cleaning agent to form mixed bubbles. These bubbles can enhance the cleaning effect of the cleaning agent when they explode, and help break the adhesion between the dirt and the surface.

[0055] In order to improve the cleaning effect of the detergent, a cleaning box 26 is fixedly connected to the working box 1. A certain proportion of water source and detergent are filled into the cleaning box 26 for mixed use. A connecting rod 24 is rotatably connected to the cleaning box 26. A stirring paddle 27 is fixedly connected to the outer wall of the connecting rod 24, and the stirring paddle 27 is arranged in the cavity of the cleaning box 26. A first water pump 28 is arranged on the working box 1. The input end of the first water pump 28 is connected to the cleaning box 26 through a pipeline, and the output end of the first water pump 28 is fixedly connected to the spray plate 6 through a telescopic tube 36.

[0056] When the liquid spray plate 6 needs to spray detergent, the first water pump 28 is started to transport the detergent inside the cleaning box 26 to the liquid spray plate 6 through the telescopic tube 36. During this process, the connecting rod 24 continuously drives the stirring paddle 27 to rotate, so that the stirring paddle 27 improves the mixing effect of the water source and the detergent.

[0057] In order to facilitate the rotation of the connecting rod 24, a transmission disk 22 is provided in the working box 1, and the two sides of the transmission disk 22 are respectively connected to the telescopic tube 36, the rotating shaft 20 is rotatably connected to the transmission disk 22, and the rotating shaft 20 is fixedly connected to a turbine blade 23, the turbine blade 23 is arranged in the transmission disk 22, the connecting rod 24 is fixedly connected to an auxiliary gear 25, and the rotating shaft 20 is fixedly connected to a main gear 21, and the main gear 21 is meshed with the auxiliary gear 25.

[0058] When the first water pump 28 is started, the cleaning agent in the cleaning box 26 will be transported to one side of the transmission disc 22 through the telescopic tube 36. At this time, the water flow will drive the turbine blade 23 to rotate in the transmission disc 22, so that the turbine blade 23 drives the rotating shaft 20 to rotate, and then the rotating shaft 20 drives the connecting rod 24 to rotate.

[0059] In order to facilitate the flushing of the cleaning agent after standing, a second water pump 30 is arranged in the working box 1, and a liquid storage tank 29 is fixedly connected to the working box 1. The liquid storage tank 29 is filled with a clean water source, such as tap water or purified water. The input end of the second water pump 30 is connected to the liquid storage tank 29 through a pipeline, and the output end of the second water pump 30 is fixedly connected to the spray plate 6 through a pipeline, and a one-way valve is arranged on the pipeline.

[0060] The second water pump 30 is switched on and the first water pump 28 is switched off, so that the second water pump 30 pressurizes and delivers the water source in the liquid storage tank 29 to the liquid spray plate 6, thereby flushing the residual detergent on the sampled pipeline.

[0061] After cleaning the dirt on the sampled pipe by the liquid spray plate 6, the contamination of the sample by the dirt during the sampling process can be avoided, thereby more truly reflecting the actual situation of the pipe, and the clean surface helps to obtain a representative sample, making the sampling result more reliable.

[0062] In order to further improve the drying speed of residual water stains, a blowing or collecting mechanism is also provided on the cleaning end of the scraping mechanism. When the driving part drives the working end of the scraping mechanism to move back and forth, the blowing or collecting mechanism can blow or collect the pipeline surface.

[0063] The above-mentioned purging or collecting mechanism comprises: a mounting box 18 with a cavity inside, wherein the mounting box 18 is fixedly connected to the scraper 17, a through hole is opened on the mounting box 18, and the working end of the through hole faces the side wall of the scraper 17, and a gas pipeline 40 is fixedly connected to the mounting box 18, and a three-way valve 41 is installed on the gas pipeline 40;

[0064] By generating negative pressure or pressurization effect in the cavity of the installation box 18, the through hole is sprayed toward the outside or negative pressure is adsorbed.

[0065] Reference Figure 6 and Figure 7 In order to facilitate the timely collection of samples during the sampling process of the scraper 17, a limit box 31 is further provided in the working box 1. A support plate 32 is fixedly connected in the limit box 31, and a collecting box 33 is detachably connected to the limit box 31. An opening is provided at the bottom of the collecting box 33, and a filter screen 35 is provided on the opening. The outside of the filter screen 35 is against the top of the support plate 32, and a reflux chamber is formed between the support plate 32 and the collecting box 33. A flow hole 34 is provided on the side wall of the collecting box 33, and an air inlet pipe 42 connected to the flow hole 34 is connected to the side wall of the limit box 31, and the air inlet pipe 42 is fixedly connected to the first channel on the three-way valve 41. A first negative pressure pump 38 and a second negative pressure pump 39 are respectively provided in the working box 1, and a gas pipeline 40 is connected to the reflux chamber, and the input end of the first negative pressure pump 38 is connected to the limit box 31 through a pipeline, and the output end of the second negative pressure pump 39 is fixedly connected to the second channel on the three-way valve 41 through a pipeline.

[0066] When it is necessary to collect samples in time, the passage of the three-way valve 41 is controlled to make the first channel on the three-way valve 41 unobstructed and the second channel on the three-way valve 41 blocked, and then the first negative pressure pump 38 switch is started to generate negative pressure in the reflux chamber in the limit box 31, and then generate negative pressure in the cavity of the installation box 18, so as to collect the samples in the sampling process of the scraper 17, and the samples will be transported to the flow hole 34 through the negative pressure airflow, and then enter the collection box 33 through the flow hole 34, and the filter 35 can intercept the samples in the negative pressure airflow, so as to achieve the collection effect, and the collection box 33 can also be taken out, so as to conveniently collect the samples, thereby improving the practicality of the device.

[0067] The gas can be delivered to the three-way valve 41 through the second negative pressure pump 39, and the second channel on the three-way valve 41 is unblocked, and the first channel on the three-way valve 41 is blocked, so that the through hole on the installation box 18 sprays gas to clean the impurities on the scraper 17, thereby improving the purity of the sampling during the sampling process.

[0068] Reference Figure 1-Figure 7 , a non-metallic pipeline surface micro-damage sampling method, the operation steps are as follows:

[0069] Step 1: Place two sets of support and limit seats 2 on the surface of the non-metallic pipe respectively, and make the bottom of the support and limit seat 2 abut against the surface of the pipe;

[0070] Step 2: spraying the cleaning agent toward the pipeline surface through the liquid spray plate 6, and leaving the cleaning agent to stand;

[0071] Step 3: spray clean water source toward the cleaning agent on the pipe surface through the liquid spray plate 6 to clean the pipe surface;

[0072] Step 4: Unseal the opening of the collection frame 3, start the purge mechanism in the purge or collection mechanism, and drive the purge mechanism to move back and forth in the cavity of the collection frame 3 through the driving unit to purge and dry the water stains remaining on the surface of the pipeline;

[0073] Step 5: Scrape the dried pipe surface through a scraping mechanism, and collect the scraped sample through a collecting mechanism in a purge or collection mechanism.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A non-metallic pipeline surface micro-damage sampling device, comprising a working box (1), characterized in that: Also includes: Two groups of support and limit seats (2) are respectively fixedly connected to the bottom of the working box (1), and a collection chamber is formed between the two groups of support and limit seats (2); A collection frame (3) that penetrates from top to bottom is arranged in the collection chamber. The collecting frame (3) is slidably connected with a sealing plate (4) for sealing or unsealing the opening end of the collecting frame (3); a scraping mechanism is arranged inside the collecting frame (3); when the opening of the collecting frame (3) is unsealed, the working end of the scraping mechanism can extend to the outside of the collecting frame (3) and abut against the outer wall of the pipeline; and a driving part for driving the scraping mechanism to reciprocate is arranged inside the working box (1); The blowing or collecting mechanism is arranged on the cleaning end of the scraping mechanism. When the driving unit drives the working end of the scraping mechanism to move back and forth, the blowing or collecting mechanism can blow or collect the surface of the pipeline.

2. A non-metallic pipeline surface micro-damage sampling device according to claim 1, characterized in that: The driving part comprises a movable block (14) slidably connected in the working box (1), a first telescopic member (16) being fixedly connected to the movable block (14), the scraping mechanism being arranged at the working end of the first telescopic member (16), and a through hole connected to the collecting frame (3) being provided on the working box (1), and the scraping mechanism extending into the through hole.

3. A non-metallic pipeline surface micro-damage sampling device according to claim 2, characterized in that: The scraping mechanism comprises a scraper (17), the scraper (17) is fixedly connected to the first telescopic member (16), and the blowing or collecting mechanism is arranged on the side wall of the scraper (17), and the output end of the blowing or collecting mechanism faces the side wall of the scraper (17).

4. A non-metallic pipeline surface micro-damage sampling device according to claim 3, characterized in that: The purging or collecting mechanism comprises: A mounting box (18) having a cavity therein, The installation box (18) is fixedly connected to the scraper (17), a through hole is provided on the installation box (18), a working end of the through hole faces the side wall of the scraper (17), a gas pipeline (40) is fixedly connected to the installation box (18), and a three-way valve (41) is installed on the gas pipeline (40); A limit box (31) is fixedly connected to the working box (1), The limiting box (31) is fixedly connected with a support plate (32), the limiting box (31) is detachably connected with a collecting box (33), the bottom of the collecting box (33) is provided with an opening, and a filter screen (35) is provided on the opening, the outside of the filter screen (35) is against the top of the supporting plate (32), and a reflux cavity is formed between the supporting plate (32) and the collecting box (33), the side wall of the collecting box (33) is provided with a flow hole (34), and the side wall of the limiting box (31) is connected with a filter screen (35) for contacting with the flow. An air intake pipe (42) is connected to the through hole (34), and the air intake pipe (42) is fixedly connected to the first channel on the three-way valve (41), a first negative pressure pump (38) and a second negative pressure pump (39) are respectively arranged in the working box (1), the air delivery pipeline (40) is connected to the reflux chamber, and the input end of the first negative pressure pump (38) is connected to the limit box (31) through a pipeline, and the output end of the second negative pressure pump (39) is fixedly connected to the second channel on the three-way valve (41) through a pipeline.

5. The non-metallic pipeline surface micro-damage sampling device according to claim 1, characterized in that: A fixing plate (5) is fixedly connected to the support limit seat (2), a liquid spraying plate (6) is slidably connected to the fixing plate (5), and a liquid spraying hole (7) is provided on the liquid spraying plate (6), and a working end of the liquid spraying hole (7) faces the pipeline surface.

6. A non-metallic pipeline surface micro-damage sampling device according to claim 5, characterized in that: The two ends of the liquid spraying plate (6) are respectively provided with movable rods (8), and two groups of the movable rods (8) are respectively slidably connected to the fixed plate (5), and a spring is sleeved on the movable rod (8), and the two ends of the spring are respectively against the liquid spraying plate (6) and the fixed plate (5), and the working box (1) is rotatably connected with a rotating shaft (20), and the rotating shaft (20) is fixedly connected with a cam (10), and the first group of the movable rods (8) extends to the outside of the fixed plate (5) and is provided with a pressure plate (9), and The pressure plate (9) abuts against the cam (10), and a booster cylinder (11) is fixedly connected to the outer wall of the support limit seat (2). The first group of movable rods (8) extend to the booster cylinder (11) and a piston is arranged inside the booster cylinder (11), and the piston fits with the inner wall of the booster cylinder (11). The booster cylinder (11) is respectively provided with an air intake connecting pipe and an air outlet connecting pipe (37), and both the air intake connecting pipe and the air outlet connecting pipe (37) are provided with a one-way valve, and the air outlet connecting pipe (37) is connected to the liquid spray plate (6).

7. A non-metallic pipeline surface micro-damage sampling device according to claim 6, characterized in that: A cleaning box (26) is fixedly connected to the working box (1), a connecting rod (24) is rotatably connected to the cleaning box (26), a stirring paddle (27) is fixedly connected to the outer wall of the connecting rod (24), and the stirring paddle (27) is arranged in the cavity of the cleaning box (26), a first water pump (28) is arranged on the working box (1), an input end of the first water pump (28) is connected to the cleaning box (26) through a pipeline, and an output end of the first water pump (28) is fixedly connected to the liquid spray plate (6) through a telescopic tube (36).

8. A non-metallic pipeline surface micro-damage sampling device according to claim 7, characterized in that: A transmission disc (22) is arranged in the working box (1), and two sides of the transmission disc (22) are respectively connected to the telescopic tube (36); the rotating shaft (20) is rotatably connected to the transmission disc (22), and a turbine blade (23) is fixedly connected to the rotating shaft (20), and the turbine blade (23) is arranged in the transmission disc (22); an auxiliary gear (25) is fixedly connected to the connecting rod (24), and a main gear (21) is fixedly connected to the rotating shaft (20), and the main gear (21) is meshed with the auxiliary gear (25).

9. A non-metallic pipeline surface micro-damage sampling device according to claim 7, characterized in that: A second water pump (30) is arranged in the working box (1), and a liquid storage tank (29) is fixedly connected to the working box (1); an input end of the second water pump (30) is connected to the liquid storage tank (29) via a pipeline, and an output end of the second water pump (30) is fixedly connected to the liquid spray plate (6) via a pipeline, and a one-way valve is arranged on the pipeline.

10. A non-metallic pipeline surface micro-damage sampling method, comprising a non-metallic pipeline surface micro-damage sampling device according to any one of claims 1 to 9, characterized in that: The steps are as follows: Step 1: Place two sets of support and limit seats (2) on the surface of the non-metallic pipe respectively, and make the bottom of the support and limit seats (2) abut against the surface of the pipe; Step 2: spraying the cleaning agent toward the surface of the pipeline through the liquid spray plate (6), and leaving the cleaning agent to stand; Step 3: spraying clean water toward the cleaning agent on the surface of the pipe through the liquid spray plate (6) to clean the surface of the pipe; Step 4: Unseal the opening of the collection frame (3), start the purge mechanism in the purge or collection mechanism, and drive the purge mechanism to move back and forth in the cavity of the collection frame (3) through the driving unit to purge and dry the water stains remaining on the surface of the pipeline; Step 5: Scrape the dried pipe surface through a scraping mechanism, and collect the scraped sample through a collecting mechanism in a purge or collection mechanism.

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