A drill pipe for hydrogeology, engineering geology and environment geology with an automatic cleaning function

Abstract

The present invention discloses a drill pipe for a hydraulic ring with an automatic cleaning function, specifically relating to the field of hydraulic ring drill pipes. It includes a drill pipe body, which has multiple sections. The multiple sections of the drill pipe body are connected through connection parts at the head end and the tail end. The drill pipe body is inserted into a limiter, and an outer bracket is connected to the outside of the limiter, and an inner bracket is connected to the inside of the limiter. A rough cleaning mechanism, a fine cleaning mechanism, and a maintenance mechanism are sequentially arranged in the limiter from bottom to top. When the drill pipe is extracted, large debris adhered to the drill pipe is initially cleaned when passing through the rough cleaning mechanism, and then further cleaned through the fine cleaning mechanism. After the surface of the drill pipe is cleaned, it enters the maintenance mechanism. This process is completed within the limiter, and cleaning can be achieved during the extraction of the drill pipe, saving time and effort.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy, industrial and environmental drill pipes, and particularly to a drill pipe for water conservancy and environmental use with an automatic cleaning function. Background Technique

[0002] Water conservancy and environment involve the specialties of water conservancy, industry, environment and geological exploration. In water conservancy projects and industrial projects, drill pipes are needed for operation. After drilling at one wellhead, the drill pipe will be taken out and used for another drilling, and then stored after the drilling is completed. The surface of the drill pipe after drilling is mostly carried with adhered sundries, which causes more serious loss when the drill pipe is used again or stored. In the drilling work, high requirements are placed on the strength and anti-torsion ability of the drill pipe. Therefore, it is necessary to protect the drill pipe to extend its service life.

[0003] The application document with the patent number CN109488254B discloses a push-type drill pipe inner wall cleaning device and its using method. The annular nozzle includes a cylindrical pipe and an annular chuck fixedly sleeved at the water outlet end of the cylindrical pipe. A plurality of annular spray holes are evenly distributed on the outer side of the annular chuck. A plurality of pressing springs are evenly installed on the outer wall of the cylindrical pipe. The water inlet device is fixedly installed at the water inlet end of the cylindrical pipe. The movable valve is movably clamped on the cylindrical pipe through the first spring support. The inner diameter of the pressing spring is larger than the outer diameter of the cylindrical pipe and smaller than the inner diameter of the first spring support. The movable valve is movably sleeved on the annular chuck through the annular groove. The length of the cylindrical pipe is greater than the length of the female interface of the drill pipe to be cleaned. The length of the movable valve is less than the length of the cylindrical pipe. This drill pipe inner wall cleaning device cleans the inner wall of the drill pipe before drilling, improves the cleanliness of the drill pipe, extends the service life of the drill pipe, and is beneficial to improving the working efficiency of drilling construction.

[0004] However, it only performs cleaning after the drill pipe is withdrawn from the drilling, requires special equipment and needs to transport the drill pipe to the cleaning equipment, consuming a lot of time and manpower. Summary of the Invention

[0005] The purpose of the present invention is to provide a drill pipe for water conservancy and environmental use with an automatic cleaning function, so as to solve the technical problem of the large amount of time and manpower consumed in cleaning the drill pipe proposed in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A drill pipe for hydrogeology, engineering geology and environmental geology with an automatic cleaning function, comprising a drill pipe body. The drill pipe body has multiple sections, and the multiple sections of the drill pipe body are connected through connecting parts at the head end and the tail end. The drill pipe body is inserted into a limiter, the outside of the limiter is connected to an outer bracket, and the inside of the limiter is connected to an inner bracket. A rough cleaning mechanism, a fine cleaning mechanism and a maintenance mechanism are sequentially arranged in the limiter from bottom to top. When the drill pipe is extracted, when passing through the rough cleaning mechanism, large debris adhering to the drill pipe is initially cleaned, and then further cleaned through the fine cleaning mechanism. After the surface of the drill pipe is cleaned, it enters the maintenance mechanism. This process is completed in the limiter, and cleaning can be achieved during the extraction of the drill pipe, saving time and effort.

[0008] Preferably, the connecting part includes a male joint and a female joint respectively connected to the head and tail ends of the drill pipe body. The female joint and the male joint of the sequentially connected drill pipe bodies are threadedly connected. The outside of the male joint and the female joint is annular, and the annular male joint and female joint are more convenient for cleaning.

[0009] Preferably, the limiter includes a limiting cylinder. The outer bracket includes an inclined rotating frame fixedly connected to the limiting cylinder. The inclined rotating frame is rotatably connected to a directional rotating frame. The inclined rotating frame and the directional rotating frame are connected through a first positioning mechanism. The directional rotating frame is rotatably connected to a fixed frame. The directional rotating frame and the fixed frame are connected through a second positioning mechanism. The inclined rotating frame connected to the outer bracket can adjust the drilling angle of the drill pipe by rotating relative to the directional rotating frame, and the directional rotating frame can adjust the drilling direction of the drill pipe by rotating relative to the fixed frame.

[0010] Preferably, the first positioning mechanism includes a positioning hydraulic cylinder connected to the inclined rotating frame and the directional rotating connection. The two ends of the positioning hydraulic cylinder are respectively rotatably connected to the inclined rotating frame and the directional rotating frame through pin columns. The second positioning mechanism includes an arc-shaped hydraulic cylinder fixedly connected to the fixed frame. An arc-shaped hydraulic rod fixed to the positioning rotating frame is slidably connected in the arc-shaped hydraulic cylinder. The positioning hydraulic cylinder and the arc-shaped hydraulic cylinder are used to control the rotation angles of the inclined rotating frame and the directional rotating frame, which is more convenient for adjustment and more stable after adjustment.

[0011] Preferably, the rough cleaning mechanism includes an annular track arranged in the limiting cylinder. A connecting rod is slidably connected to the annular track. The connecting rod is connected to a scraping plate. An inclined roller is rotatably connected to the connecting rod. The rough inclined mechanism uses the scraping plate connected to the connecting rod to clean the surface of the drill pipe.

[0012] Preferably, there are multiple connecting rods, and the multiple connecting rods are annularly arranged around the axis of the annular track. The connecting rod includes a sliding rod slidably connected to the annular track. The sliding rod is slidably connected to the axis direction of the piston rod through a spring. The multiple sliding rods are fixedly connected through a fixing ring. The multiple connecting rods are annularly arranged around the annular track, which can clean the drill pipe in multiple directions. And the connecting rod adopts the way that the sliding rod is slidably connected to the axis direction of the piston rod, so that the scraping plate can abut against the surface of the drill pipe and keep fitting cleaning for different diameter parts of the drill pipe.

[0013] Preferably, the axis of the connecting rod is located on the diameter of the annular track, the plane where the roller is located is inclined parallel to the annular track, the scraping plate includes arc plates bent outward at both ends, the arc plates are rotatably connected to the connecting rod through a rotating shaft, the arc plates are fixedly connected to the scraping blade, a spring is connected between the scraping blade and the connecting rod, the roller is set to be inclined with respect to the annular track. When the drill pipe moves relative to the limiting cylinder, when the drill pipe moves the roller in contact with it upward, a horizontal component force is generated, causing the roller to drive the connecting rod and the scraping plate to rotate around the drill pipe, so that the scraping plate moves along a spiral path on the drill pipe.

[0014] Preferably, the heights of the plurality of connecting rods decrease. The arrangement of decreasing the heights of the plurality of connecting rods makes the spiral path swept by the next scraping plate on the drill pipe partially coincide with the path swept by the next drill pipe, so as to clean the same position on the drill pipe multiple times to ensure the cleaning effect.

[0015] Preferably, the fine cleaning mechanism includes a water spraying ring arranged in the limiting cylinder. The top surface and the bottom surface of the water spraying ring are parallel, and the top surface of the water spraying ring is inclined with respect to the cross-section of the limiting cylinder. A plurality of groups of spray pipes are slidably connected inside the water spraying ring. A sliding cavity is arranged at the end of the spray pipe, a sliding column is slidably connected inside the sliding cavity, a ball is rotatably connected inside the sliding column, a water spraying hole is arranged on the side of the spray pipe, the sliding column is fixed to the sliding sleeve, the sliding sleeve is sleeved outside the sliding cavity and a hole staggered from the water spraying hole is arranged on the sliding sleeve. A plurality of spray pipes are arranged in the water spraying ring in the fine cleaning mechanism, and water is sprayed after the spray pipe abuts against the drill pipe. Water is sprayed and cleaned at a certain distance for different diameter parts of the drill pipe to avoid insufficient cleaning due to the reduction of the water flow pressure sprayed.

[0016] Preferably, the maintenance mechanism includes an oil brush arranged in the limiting cylinder. The oil brush is connected to the oil inlet pipe through a telescopic oil guide pipe. The oil brush includes a permeable plate, and the permeable plate is connected to the coating layer. The maintenance mechanism is used to coat an oil film on the surface of the drill pipe to play an anti-corrosion protection role for the drill pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. When drilling, the drill pipe passes through the limiting cylinder. After drilling is completed, during the process of extracting the drill pipe, the drill pipe is preliminarily cleaned by the rough cleaning mechanism, further cleaned by the fine cleaning mechanism, and finally processed by the maintenance mechanism, so that the drill pipe is kept clean and plays a protective role for the drill pipe, extending the service life of the drill pipe. Moreover, cleaning and maintenance are completed during the process of extracting the drill pipe, which saves time and effort and reduces the maintenance cost;

[0019] 2. The drill pipe is coaxially inserted and connected with the limit cylinder through the inner support. The inclined rotating frame rotates relative to the directional rotating frame to adjust the drilling angle of the rotating rod. The directional rotating frame rotates relative to the fixed frame to adjust the drilling direction of the drill pipe according to requirements. Moreover, the drilling angle and the drilling direction are respectively controlled by the directional hydraulic cylinder and the arc-shaped hydraulic cylinder, with high adjustment precision and strong stability after adjustment;

[0020] 3. The rough cleaning mechanism inside the drill pipe is set as a telescopic connecting rod connected with a scraper. Multiple connecting rods are arranged in a circular array to comprehensively clean the surface of the drill pipe. The heights of the scrapers connected by multiple connecting rods are gradually changed, and the same part of the drill pipe can be repeatedly cleaned to ensure thorough cleaning. A roller is connected to the connecting rod, and the roller is inclined with respect to the drill pipe. During the process of lifting the drill pipe, a radial force is generated on the roller, causing the roller to roll on the surface of the drill pipe, thereby making the connecting rod and the scraper rotate around the drill pipe. Since the drill pipe is in a lifted state, the scraper can form a spiral sweeping path on the surface of the drill pipe;

[0021] 4. The fine cleaning mechanism adopts the method of water spraying for cleaning. For different diameters of parts on the drill pipe, the distance between the water flow ejected from the water spraying holes and the surface of the drill pipe is the same, thereby ensuring cleaning of the surface of the drill pipe with a certain water pressure;

[0022] 5. The maintenance mechanism adopts a telescopic oil brush. When the oil brush touches the drill pipe, under the action of pressure, the oil liquid oozes out from the permeable plate and is coated on the drill pipe through the coating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a schematic structural diagram of the present invention after adjusting the angle and direction of the limit cylinder;

[0025] Figure 3 is a schematic structural diagram of the limit cylinder of the present invention;

[0026] Figure 4 is a cross-sectional view of the limit cylinder of the present invention;

[0027] Figure 5 is a schematic structural diagram of the rough cleaning mechanism of the present invention;

[0028] Figure 6 is a schematic structural diagram of the rough cleaning mechanism of the present invention;

[0029] Figure 7 is a cross-sectional view of the fine cleaning mechanism of the present invention;

[0030] Figure 8 is a schematic structural diagram of the maintenance mechanism of the present invention.

[0031] In the figure: 1, drill rod body; 11, female joint; 12, male joint; 2, stopper; 21, rough cleaning mechanism; 211, annular track; 212, slider; 213, compression spring; 214, arc plate; 215, scraper; 2151, arc rod; 2152, resistance spring; 216, inclined roller; 217, movable rod; 218, slide rod; 22, fine cleaning mechanism; 221, water spray ring; 222, water inlet pipe; 223, water spray pipe; 2231, slide cavity; 2232, water spray hole; 224, sliding sleeve; 2241, inclined hole; 2242, sliding column; 225, ball bearing; 23, maintenance mechanism; 231, oil tank; 232, oil inlet pipe; 233, oil guide pipe; 234, frame; 235, seepage plate; 236, coating layer; 24, inner bracket; 241, support sleeve; 242, support wheel; 3, outer bracket; 31, tilting rotating frame; 32, directional rotating frame; 321, directional hydraulic cylinder; 33, fixed frame; 331, arc hydraulic cylinder. DETAILED DESCRIPTION

[0032] Example 1

[0033] like Figure 1-4 As shown, a drill pipe for hydraulic engineering rings with automatic cleaning function includes a drill pipe body 1, the drill pipe body 1 has multiple sections, and the multiple sections of the drill pipe body 1 are connected by connecting parts at the head end and the tail end. The drill pipe body 1 is inserted into a limiter, the outside of the limiter is connected to an external bracket 3, and the inside of the limiter is connected to an internal bracket 24. A rough cleaning mechanism 21, a fine cleaning mechanism 22, and a maintenance mechanism 23 are arranged in sequence from bottom to top in the limiter. The connecting part includes a male connector 12 and a female connector 11 respectively connected to the head and tail ends of the drill pipe body 1, and the female connector 11 of the drill pipe body 1 connected in sequence is threadedly connected to the male connector 12, and the male connector 12 and the female connector 11 are annular on the outside.

[0034] During drilling, the bottom end of the drill pipe body 1 is connected to the drill bit, and the top end is driven by the drilling rig. In the working state of the drilling rig, the outer support 3 connected to the limiting cylinder 2 is fixed to the ground. The drilling rig drives the drill bit and the drill pipe body 1 to rotate and move downward relative to the limiting cylinder 2. After the drilling is completed, when extracting the drill pipe body 1, the drilling rig withdraws the drill pipe body 1 from the well. During the extraction process, the drill pipe body 1 moves upward relative to the limiting cylinder 2. At this time, since the inner support 24 is arranged in the limiting cylinder 2, the inner support 24 includes a support sleeve 241 and a support wheel 242 slidably connected to the support sleeve 241. The support wheel 242 abuts against the side surface of the drill pipe body 1 under the action of the internal pressure of the support sleeve 241. The four inner supports 24 support the drill pipe body 1 together from four directions, so that the drill pipe body 1 always remains coaxial with the limiting cylinder 2 during the drilling and extraction processes. The inner supports 24 are divided into two groups, and the two groups of support frames are arranged at the upper and lower ends of the limiting cylinder 2. During the extraction process of the drill pipe body 1, its surface first contacts the rough cleaning mechanism 21, and the rough cleaning mechanism 21 performs the first cleaning work to remove large debris adhered to the surface of the drill pipe body 1. During the continuous upward movement of the drill pipe body 1, it aligns with the fine cleaning mechanism 22 for secondary cleaning, so that the surface of the drill pipe body 1 remains smooth. After the cleaning is completed, the drill pipe body 1 aligns with the maintenance mechanism for maintenance. When a section of the drill pipe body 1 is located above the limiting cylinder 2, this section of the drill pipe body 1 is disassembled, and then the drilling rig continues to withdraw another drill pipe body 1 upward. The female joint 11 at the top end of the adjacent drill pipe body 1 is threadedly connected to the male joint 12 at the bottom end of the adjacent drill pipe body 1. The drill pipe can be cleaned and maintained immediately after being withdrawn from the well, which is convenient for the next use or storage, and prolongs the service life of the drill pipe.

[0035] Embodiment 2

[0036] As Figure 1-4 shown, a drill pipe for a hydraulic ring with an automatic cleaning function includes a drill pipe body 1. There are multiple sections of the drill pipe body 1, and the multiple sections of the drill pipe body 1 are connected through the connecting parts at the head end and the tail end. The drill pipe body 1 is inserted into the limiter. The outside of the limiter is connected to the outer support 3, and the inside of the limiter is connected to the inner support 24. A rough cleaning mechanism 21, a fine cleaning mechanism 22, and a maintenance mechanism 23 are sequentially arranged in the limiter from bottom to top. The limiter includes a limiting cylinder 2. The outer support 3 includes an inclined rotating frame 31 fixedly connected to the limiting cylinder 2. The inclined rotating frame 31 is rotatably connected to the directional rotating frame 32. The inclined rotating frame 31 and the directional rotating frame 32 are connected through a first positioning mechanism. The directional rotating frame 32 is rotatably connected to the fixed frame 33. The directional rotating frame 32 and the fixed frame 33 are connected through a second positioning mechanism. The first positioning mechanism includes a positioning hydraulic cylinder connected to the inclined rotating frame 31 and the directional rotating connection. The two ends of the positioning hydraulic cylinder are respectively rotatably connected to the inclined rotating frame 31 and the directional rotating frame 32 through pin shafts. The second positioning mechanism includes an arc-shaped hydraulic cylinder 331 fixedly connected to the fixed frame 33. An arc-shaped hydraulic rod fixed to the positioning rotating frame is slidably connected inside the arc-shaped hydraulic cylinder 331.

[0037] The limiting cylinder 2 is rotatably connected to the inclined rotating frame 31. By controlling the length of the directional hydraulic cylinder 321, the included angle between the limiting cylinder 2 and the horizontal plane can be adjusted. By controlling the arc-shaped hydraulic cylinder 331, the directional rotating frame 32 can be controlled to rotate relative to the fixed frame 33, and the angle of the limiting cylinder 2 can be adjusted according to the drilling angle requirement, so that the limiting cylinder 2 is adapted to the drilling angle of the drill pipe.

[0038] Embodiment 3

[0039] As Figure 1-6 shown, a drill pipe for a hydraulic ring with an automatic cleaning function includes a drill pipe body 1. The drill pipe body 1 has multiple sections, and the multiple sections of the drill pipe body 1 are connected through the connecting parts at the head end and the tail end. The drill pipe body 1 is inserted into a limiter. An outer bracket 3 is connected to the outside of the limiter, and an inner bracket 24 is connected to the inside of the limiter. A rough cleaning mechanism 21, a fine cleaning mechanism 22, and a maintenance mechanism 23 are sequentially arranged in the limiter from bottom to top. The limiter includes a limiting cylinder 2. The outer bracket 3 includes an inclined rotating frame 31 fixedly connected to the limiting cylinder 2. The inclined rotating frame 31 is rotatably connected to a directional rotating frame 32. The inclined rotating frame 31 and the directional rotating frame 32 are connected through a first positioning mechanism. The directional rotating frame 32 is rotatably connected to a fixed frame 33. The directional rotating frame 32 and the fixed frame 33 are connected through a second positioning mechanism. The rough cleaning mechanism 21 includes an annular track 211 arranged in the limiting cylinder 2. A connecting rod is slidably connected to the annular track 211. The connecting rod is connected to a scraping plate. An inclined roller 216 is rotatably connected to the connecting rod. There are multiple connecting rods, and the multiple connecting rods are annularly arranged around the axis of the annular track 211. The connecting rod includes a sliding rod 218 slidably connected to the annular track 211. The sliding rod 218 is slidably connected to the axis direction of a movable rod 217 through a spring. The multiple sliding rods 218 are fixedly connected through a fixing ring. The axis of the connecting rod is located on the diameter of the annular track 211. The plane where the roller is located is inclined parallel to the plane where the annular track 211 is located. The scraping plate includes arc plates 214 bent outward at both ends. The arc plates 214 are rotatably connected to the connecting rod through a rotating shaft. The arc plates 214 are fixedly connected to scraping blades 215. A spring is connected between the scraping blades 215 and the connecting rod. The heights of the multiple connecting rods decrease successively.

[0040] When the drill pipe body 1 passes through the rough cleaning mechanism 21, under the pressure of the compression spring 213, the movable rod 217 connected to the sliding rod 218 and the arc plate 214 fixedly connected to the movable rod 217 abut against the side surface of the drill pipe body 1. The scraping blade 215 rotatably connected to the side surface of the arc plate 214 abuts against the surface of the drill pipe body 1 under the action of the abutting spring 2152. At the same time, the drill pipe body 1 abuts against the roller. During the process of the drill pipe moving upward relative to the limiting cylinder 2, the drill pipe generates a radial force along the roller on the roller with which it abuts, so that the roller rotates, and the roller together with the connecting rod slides relative to the annular track 211, that is, the slider 212 slides relative to the annular track 211. At this time, the scraping blade 215 rotates around the drill pipe body 1, so as to clean the large debris adhered to the drill pipe body 1. There are 4 groups of rough cleaning mechanisms 21 and they are arranged in a circular array. The heights of the 4 groups of scraping blades 215 decrease in sequence. During the process of the drill pipe body 1 being extracted, the same part of the surface of the drill pipe body 1 contacts the 4 groups of scraping blades 215 respectively, so as to perform multiple primary cleanings on the same part of the drill pipe surface to ensure the comprehensiveness of the cleaning. The two ends of the arc plate 214 are set to be arc-shaped. During the lifting process of the drill pipe body 1, the part of the female joint 11 with a larger diameter abuts against the arc plate 214, causing the connecting rod to shorten, and the compression spring 213 is further compressed, so that the scraping blade 215 remains in contact with the drill pipe. The abutting spring 2152 is sleeved on the arc-shaped rod 2151. One end of the arc-shaped rod 2151 is fixed to the scraping blade 215, and the arc-shaped rod 2151 slides relative to the movable rod 217.

[0041] Embodiment 4

[0042] As Figure 1-7As shown in the figure, a drill pipe for hydrogeological and engineering geological exploration with an automatic cleaning function includes a drill pipe body 1. The drill pipe body 1 has multiple sections, and the multiple sections of the drill pipe body 1 are connected through the connecting parts at the head end and the tail end. The drill pipe body 1 is inserted into a limiter. The outside of the limiter is connected to an outer support 3, and the inside of the limiter is connected to an inner support 24. A rough cleaning mechanism 21, a fine cleaning mechanism 22, and a maintenance mechanism 23 are sequentially arranged in the limiter from bottom to top. The limiter includes a limiting cylinder 2. The outer support 3 includes an inclined rotating frame 31 fixedly connected to the limiting cylinder 2. The inclined rotating frame 31 is rotatably connected to a directional rotating frame 32. The inclined rotating frame 31 and the directional rotating frame 32 are connected through a first positioning mechanism. The directional rotating frame 32 is rotatably connected to a fixed frame 33. The directional rotating frame 32 and the fixed frame 33 are connected through a second positioning mechanism. The fine cleaning mechanism 22 includes a water spraying ring 221 arranged in the limiting cylinder 2. The top and bottom surfaces of the water spraying ring 221 are parallel, and the top surface of the water spraying ring 221 is inclined with respect to the cross-section of the limiting cylinder 2. A plurality of groups of spray water pipes 223 slidably connected are arranged inside the water spraying ring 221. A sliding cavity 2231 is arranged at the end of the spray water pipe 223. A sliding column 2242 is slidably connected inside the sliding cavity 2231. A ball 225 is rotatably connected inside the sliding column 2242. A water spraying hole 2232 is arranged on the side of the spray water pipe 223. The sliding column 2242 is fixed to a sliding sleeve 224. The sliding sleeve 224 is sleeved outside the sliding cavity 2231, and a hole staggered from the water spraying hole 2232 is arranged on the sliding sleeve 224.

[0043] When the drill pipe body 1 is aligned with the fine cleaning mechanism 22 during the upward movement after passing through the rough cleaning mechanism 21, the water pressure is increased to make the spray water pipe 223 slide relative to the water spraying ring 221 until the ball 225 abuts against the drill pipe body 1. The ball 225 and the sliding sleeve 224 slide relative to the spray water pipe 223 under the reaction force of the drill pipe body 1. The sliding column 2242 slides inside the sliding cavity 2231 to compress the air inside the sliding cavity 2231 until the inclined hole 2241 on the side of the sliding sleeve 224 is aligned with the water spraying hole 2232 on the side of the spray water pipe 223. The water flow in the spray water pipe 223 sprays out through the inclined hole 2241 and acts on the surface of the drill pipe, and the surface of the drill pipe body 1 is secondarily cleaned by the high-pressure water flow impacting the drill pipe. During the movement of the drill pipe body 1, the ball 225 rolls relative to the drill pipe body 1 to reduce friction. The side of the water spraying ring 221 is communicated with a water inlet pipe 222.

[0044] Embodiment 5

[0045] As Figure 1-8, A drill pipe for hydrogeological and environmental engineering with an automatic cleaning function, comprising a drill pipe body 1. The drill pipe body 1 has multiple sections, and the multiple sections of the drill pipe body 1 are connected through connection parts at the head and tail ends. The drill pipe body 1 is inserted into a limiter, and an outer bracket 3 is connected to the outside of the limiter, and an inner bracket 24 is connected to the inside of the limiter. A rough cleaning mechanism 21, a fine cleaning mechanism 22, and a maintenance mechanism 23 are sequentially arranged in the limiter from bottom to top. The limiter includes a limiting cylinder 2. The outer bracket 3 includes an inclined rotating frame 31 fixedly connected to the limiting cylinder 2. The inclined rotating frame 31 is rotatably connected to a directional rotating frame 32, and the inclined rotating frame 31 and the directional rotating frame 32 are connected through a first positioning mechanism. The directional rotating frame 32 is rotatably connected to a fixed frame 33, and the directional rotating frame 32 and the fixed frame 33 are connected through a second positioning mechanism. The maintenance mechanism 23 includes an oil brush arranged in the limiting cylinder 2. The oil brush is connected to an oil inlet pipe 232 through a telescopic oil guide pipe 233. The oil brush includes a permeable plate 235, and the permeable plate 235 is connected to a coating layer 236.

[0046] During the upward movement of the drill pipe body 1 after being processed by the fine cleaning mechanism 22, it aligns with the maintenance mechanism 23. When the surface of the drill pipe contacts the coating layer 236 fixed to the concave side of the frame 234, the permeable plate 235 is pressed, causing the oil liquid in the permeable plate 235 to be coated on the drill pipe body 1, forming an oil film on the drill pipe body 1, which can prevent the drill pipe from rusting during storage. The oil guide pipe 233 slides relative to the oil groove 231, and the coating layer 236 is made to fit against the side of the drill pipe body 1 by controlling the oil pressure.

Claims

1. A drill pipe for hydrogeological and environmental engineering with an automatic cleaning function, characterized in that: It includes a drill pipe body, which has multiple sections. The multiple sections of the drill pipe body are connected by connection parts at the head end and the tail end. The drill pipe body is inserted into a limiter. The outside of the limiter is connected to an outer bracket, and the inside of the limiter is connected to an inner bracket. A coarse cleaning mechanism, a fine cleaning mechanism, and a maintenance mechanism are sequentially arranged in the limiter from bottom to top. The coarse cleaning mechanism includes an annular track arranged in a limiting cylinder. A connecting rod is slidably connected to the annular track. The connecting rod is connected to a scraping plate, and an inclined roller is rotatably connected to the connecting rod. The plane where the inclined roller is located is inclined with respect to the plane where the annular track is located. The fine cleaning mechanism includes a water spraying ring arranged in the limiting cylinder. The top surface and the bottom surface of the water spraying ring are parallel, and the top surface of the water spraying ring is inclined with respect to the cross-section of the limiting cylinder. Multiple groups of spray pipes are slidably connected inside the water spraying ring. A sliding cavity is arranged at the end of the spray pipe. A sliding column is slidably connected in the sliding cavity. A ball is rotatably connected in the sliding column. Water spraying holes are arranged on the side of the spray pipe. The sliding column is fixed to a sliding sleeve. The sliding sleeve is sleeved outside the sliding cavity, and a hole staggered from the water spraying hole is arranged on the sliding sleeve. The maintenance mechanism includes an oil brush arranged in the limiting cylinder. The oil brush is connected to an oil inlet pipe through a telescopic guide oil pipe. The oil brush includes a permeable plate, and the permeable plate is connected to a coating layer.

2. The drill pipe for hydrogeological, engineering geological and environmental geological exploration with an automatic cleaning function according to claim 1, characterized in that: The connection part includes a male joint and a female joint respectively connected to the head and tail ends of the drill pipe body. The female joint of the sequentially connected drill pipe bodies is threadedly connected to the male joint. The outside of the male joint and the female joint is annular.

3. A drill pipe for hydrogeological and environmental engineering with an automatic cleaning function according to claim 1, characterized in that: The limiter includes a limiting cylinder. The outer bracket includes an inclined rotating frame fixedly connected to the limiting cylinder. The inclined rotating frame is rotatably connected to a directional rotating frame. The inclined rotating frame and the directional rotating frame are connected by a first positioning mechanism. The directional rotating frame is rotatably connected to a fixed frame. The directional rotating frame and the fixed frame are connected by a second positioning mechanism.

4. The drill pipe for hydrogeological, engineering geological and environmental geological exploration with an automatic cleaning function according to claim 3, wherein: The first positioning mechanism includes a positioning hydraulic cylinder connected to the inclined rotating frame and the directional rotation. The two ends of the positioning hydraulic cylinder are respectively rotatably connected to the inclined rotating frame and the directional rotating frame through pin shafts. The second positioning mechanism includes an arc-shaped hydraulic cylinder fixedly connected to the fixed frame. An arc-shaped hydraulic rod fixed to the positioning rotating frame is slidably connected inside the arc-shaped hydraulic cylinder.

5. A drill pipe for hydrogeological and environmental exploration with an automatic cleaning function according to claim 1, characterized in that: There are multiple connecting rods, and the multiple connecting rods are annularly arrayed with the axis of the annular track as the center. The connecting rod includes a sliding rod slidably connected to the annular track. The sliding rod is slidably connected to the axis direction of the movable rod through a spring. The multiple sliding rods are fixedly connected by a fixing ring.

6. A drill pipe for hydrogeological and environmental engineering with an automatic cleaning function according to claim 5, characterized in that: The axis of the connecting rod is located on the diameter of the annular track. The scraping plate includes arc plates bent outward at both ends. The arc plates are rotatably connected to the connecting rod through a rotating shaft. The arc plates are fixed to scraping blades. A spring is connected between the scraping blades and the connecting rod.

7. The drill pipe for hydrogeological and engineering geological exploration with an automatic cleaning function according to claim 6, characterized in that: The heights of the multiple connecting rods decrease successively.

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