Blockage removing device for pipeline of oil separation tank

Abstract

The invention provides an oil separation tank pipeline unblocking device which comprises a front pipe joint, a rear pipe joint is sleeved with the front pipe joint, the front pipe joint and the rear pipe joint are in sliding connection, the rear end of the rear pipe joint is connected with an outer sleeve, a central pipe is arranged on the inner side of the front end of the front pipe joint, the rear end of the central pipe penetrates through the rear pipe joint and the outer sleeve, and the outer wall of the front end of the rear pipe joint is sleeved with a limiting sleeve. An external expansion section is arranged at the rear end of the front pipe joint, the inner diameter of the rear end of the external expansion section is larger than the outer diameter of the limiting sleeve, a limiting ring is arranged at the rear end of the external expansion section, the outer diameter of the limiting sleeve is larger than the inner diameter of the limiting ring, and the limiting ring is used for stopping the limiting sleeve. The diameter of the outer wall of the rear pipe joint is smaller than the inner diameter of the limiting ring. Expandable elastic films are arranged at the sinking air grooves, the elastic films extrude the inner walls of the external expansion sections so that the front pipe joint can swing relative to the rear pipe joint, and the problems that a common dredger is small in dredging section and difficult to enter a bend are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural sewage treatment, and particularly relates to a device for clearing blockage in an oil separation tank pipeline. BACKGROUND

[0002] During agricultural sewage treatment, there are many oil stains and sundries in the branch pipe section behind the oil separation tank. A common dredging device mainly uses a long steel wire to extend into the pipeline, and the dredging efficiency is low due to a small dredging cross section. Another way is to push the blockage away by using air in the pipeline, and excessive air pressure can easily cause the pipeline to break.

[0003] In addition, due to the existence of some bends in the branch pipe section behind the oil separation tank, the common dredging device mainly relies on deformation by collision with the pipe wall and multiple attempts to enter the bend, which is difficult to operate and difficult to actively change the angle. SUMMARY

[0004] The present application provides a device for clearing blockage in an oil separation tank pipeline, which solves the problem of a small dredging cross section of a common dredging device and difficulty in entering a bend.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a device for clearing blockage in an oil separation tank pipeline, comprising a front pipe section, a rear pipe section sleeved in the front pipe section, the front pipe section and the rear pipe section being in sliding connection, an outer sleeve pipe connected to the rear end of the rear pipe section, a central pipe provided on the inner side of the front end of the front pipe section, the rear end of the central pipe penetrating the inside of the rear pipe section and the outer sleeve pipe, a limiting sleeve sleeved on the outer wall of the front end of the rear pipe section, an outer expansion section provided at the rear end of the front pipe section, the inner diameter of the rear end of the outer expansion section being larger than the outer diameter of the limiting sleeve, a limiting ring provided at the rear end of the outer expansion section, the outer diameter of the limiting sleeve being larger than the inner diameter of the limiting ring, the limiting ring being used to stop the limiting sleeve, the outer wall diameter of the rear pipe section being smaller than the inner diameter of the limiting ring, a plurality of sinking air grooves being provided on the outer wall of the limiting sleeve in a spaced distribution manner, an elastic membrane being provided at each sinking air groove, the elastic membrane being capable of expanding to press the inner wall of the outer expansion section so that the front pipe section swings relative to the rear pipe section.

[0006] In the preferred scheme, an inner contraction section is provided at the front end of the front pipe section, a sealing ring is provided between the inner contraction section and the central pipe, the central pipe is inserted into the center of the sealing ring, the sealing ring is provided with a plurality of sleeves in a circumferential direction, a transparent end piece is provided at the front end of each sleeve, a clamping cavity is provided between the central pipe and the outer sleeve pipe, a plurality of imaging optical fibers are provided in the clamping cavity, and the front end of each imaging optical fiber is inserted into the sleeve.

[0007] In the preferred scheme, a through hole is provided at the bottom end of each sinking air groove, a plurality of pipe penetrating holes are provided in the side wall of the rear pipe section and communicate with the through holes, a gas guide pipe is further provided in the clamping cavity, and the front end of the gas guide pipe penetrates the pipe penetrating hole and is inserted into the through hole.

[0008] In the preferred scheme, a front support ring and a rear support ring are respectively provided at the front end and the rear end of the rear pipe section, a plurality of distribution holes are provided on the front support ring and the rear support ring in a circumferential direction, and each gas guide pipe and imaging optical fiber penetrates each distribution hole.

[0009] In the preferred solution, a flexible inflation cover is provided outside the front pipe section and the rear pipe section, one end of the inflation cover is connected to the front end of the front pipe section, the other end of the inflation cover is connected to the rear end of the rear pipe section, a plurality of air holes are provided on the side wall of the rear end of the rear pipe section in the circumferential direction, and the air holes are ventilated to inflate the inflation cover.

[0010] In the preferred solution, a plurality of first support rods are provided on the outer wall of the front end of the front pipe section in the circumferential direction, a plurality of second support rods are provided on the outer wall of the rear end of the rear pipe section in the circumferential direction, each first support rod is hinged to each second support rod, and the inflation cover covers the outside of the first support rods and the second support rods.

[0011] In the preferred solution, a rear end sleeve is provided on the rear end of the rear pipe section, a plurality of strip-shaped sliding clamping grooves are provided on the rear end sleeve in the circumferential direction, a plurality of floating hinge terminals are provided in each sliding clamping groove and are slidable, and each floating hinge terminal is hinged to each second support rod.

[0012] In the preferred solution, a front end sleeve is provided on the front end of the front pipe section, a plurality of fixed hinge terminals are provided on the front end sleeve in the circumferential direction, and the front end of each first support rod is hinged to the fixed hinge terminals.

[0013] In the preferred solution, a plurality of connection belts are provided on the inner wall of the inflation cover, a plurality of connection holes are provided on each first support rod and each second support rod, and each connection belt is connected to each connection hole.

[0014] In the preferred solution, a pipe joint ring is provided on the inner wall of the rear end of the rear end sleeve, and the outer sleeve pipe is sleeved on the pipe joint ring.

[0015] The inner wall of the port of the outer sleeve pipe is glued and inserted into the outer wall of the rear end of the pipe joint ring, and can be reinforced by winding and binding iron wire.

[0016] The beneficial effects of the present application are: an inflatable elastic membrane is used at the connection between the front pipe section and the rear pipe section to actively change the direction of the front pipe section for easy entry into the pipe bend; Optical fibers are used at the front end to real-time feedback the conditions inside the pipeline, and the position and direction of the device are adjusted in time to adjust the dredging strategy; hinged support rods are provided outside the front pipe section and the rear pipe section, and the support rods can be expanded outside when the rear pipe section is retracted into the front pipe section to increase the dredging cross-sectional area; The front pipe section and the rear pipe section are covered with an inflation cover, a double-pipe control structure is adopted, the center pipe controls the forward and backward movement of the device, the outer sleeve pipe controls the extension or retraction of the rear pipe section, and the clamping cavity is used to ventilate the inflation cover to maximize the contact with the inner wall of the pipeline and improve the dredging efficiency; The support rods serve as the framework to support the inflation cover, which is equivalent to increasing the rigidity of the inflation cover and improving the cleaning ability of the attached tight debris or oil stains; The expansion cover coats the framework, avoiding direct contact of the framework with dirt, which is difficult to clean. When the rear pipe section extends from the front pipe section, the front end has a small area, and the gap can be used to pass through dirt and oil stains to the pipe extension. Then the expansion cover expands and adheres to the pipe wall, pulling the center pipe and the outer sleeve, bringing out the deep oil stains and dirt, avoiding pushing the oil stains and dirt deeper to exacerbate the blockage. BRIEF DESCRIPTION OF DRAWINGS

[0017] The application will be further described below in conjunction with the drawings and examples.

[0018] Figure 1 is a schematic diagram of the expansion cover covering the pipe section.

[0019] Figure 2 is an enlarged view of the expansion cover covering the pipe section.

[0020] Figure 3 is a diagram of the front pipe section and the rear pipe section at an angle.

[0021] Figure 4 is a schematic diagram of the expansion cover expanding.

[0022] Figure 5 is a diagram of the expansion cover with a framework structure overbending.

[0023] Figure 6 is an enlarged view of the limiting sleeve.

[0024] Figure 7 is a schematic diagram of the application.

[0025] Figure 8 is a diagram of the rear pipe section in the retracted state.

[0026] Figure 9 is an exploded view of the application.

[0027] Figure 10 is a cross-sectional view of the application.

[0028] Figure 11 is an enlarged view of the elastic film.

[0029] Figure 12 is a limiting sleeve structure diagram.

[0030] Figure 13 is a diagram of the distribution of optical fibers at the bundle sleeve.

[0031] Figure: front pipe section 1; limit ring 101; first support rod 102; outer expansion section 103; inner contraction section 104; sealing ring 105; front end sleeve 106; fixed hinged terminal 107; rear pipe section 2; air hole 201; limit sleeve 202; second support rod 203; sunken air groove 204; through hole 205; pipe passing hole 206; elastic membrane 207; center pipe 3; clamping cavity 301; connecting hole 302; outer sleeve 4; sealing ring 5; first air supply system 6; expansion cover 7; connecting flange 701; connecting belt 702; rear end sleeve 8; sliding clamping groove 801; floating hinged terminal 802; pipe joint ring 9; front support ring 10; distribution hole 1001; rear support ring 11; air guide pipe 12; imaging optical fiber 13; illumination optical fiber 1301; beam sleeve 14; transparent end piece 15; second air supply system 16; imaging system 17. DETAILED DESCRIPTION

[0032] As Figures 1-13 In the present application, an oil separation tank pipeline blockage clearing device includes a front pipe section 1, the front pipe section 1 is sleeved with a rear pipe section 2, the front pipe section 1 and the rear pipe section 2 are slidingly connected, the rear end of the rear pipe section 2 is connected with an outer sleeve 4, the inner side of the front end of the front pipe section 1 is provided with a center pipe 3, the rear end of the center pipe 3 passes through the inside of the rear pipe section 2 and the outer sleeve 4, the outer wall of the front end of the rear pipe section 2 is sleeved with a limit sleeve 202, the rear end of the front pipe section 1 is provided with an outer expansion section 103, the inner diameter of the rear end of the outer expansion section 103 is larger than the outer diameter of the limit sleeve 202, the rear end of the outer expansion section 103 is provided with a limit ring 101, the outer diameter of the limit sleeve 202 is larger than the inner diameter of the limit ring 101, the limit ring 101 is used to stop the limit sleeve 202, the outer wall diameter of the rear pipe section 2 is smaller than the inner diameter of the limit ring 101, the outer wall of the limit sleeve 202 is provided with a plurality of spaced sunken air grooves 204 along the circumference, each sunken air groove 204 is provided with an inflatable elastic membrane 207, the elastic membrane 207 is pressed against the inner wall of the outer expansion section 103 to make the front pipe section 1 swing relative to the rear pipe section 2.

[0033] The sunken air grooves 204 can be provided with four, one is arranged every ninety degrees, and they do not string air with each other. The expansion and contraction of each elastic membrane 207 can be independently controlled through the air pipe. Therefore, the orientation of the front pipe section 1 can be freely controlled by pressing different positions of the outer expansion section 103, and controllable turning can be realized.

[0034] The limit ring 101 is threadedly sleeved with the outer expansion section 103, the inner surface of the outer expansion section 103 is also a tapered surface, the thinnest part is abutted with the front pipe section 1, the inner diameter of this position is equal to the outer diameter of the limit sleeve 202 but is a clearance fit, the limit sleeve 202 can be slid into the front pipe section 1, and the axis of the rear pipe section 2 and the front pipe section 1 is kept parallel. The inner diameter of the thicker part of the rear end of the outer expansion section 103 is larger than the outer diameter of the limit sleeve 202, so there is space to make the rear pipe section 2 swing freely without touching the inner wall.

[0035] In the preferred embodiment, the front end of the front pipe section 1 is provided with a retracted section 104, and a sealing ring 105 is arranged between the retracted section 104 and the central pipe 3. The central pipe 3 is inserted into the center of the sealing ring 105, and the sealing ring 105 is provided with a plurality of sleeves 14 along the circumference. The front end of each sleeve 14 is provided with a transparent end piece 15. The central pipe 3 and the outer sleeve 4 are provided with a clamping cavity 301, and a plurality of imaging optical fibers 13 are arranged in the clamping cavity 301. The front end of each imaging optical fiber 13 is inserted into the sleeve 14.

[0036] The sealing ring 105 is threadedly connected to the retracted section 104 and is sealed with a threaded sealant. The end of the central pipe 3 is coated with glue and adhered to the inner wall of the sealing ring 105.

[0037] The sealing ring 105 blocks the clamping cavity space between the front pipe section 1 and the central pipe 3, preventing sewage from entering. However, the front end of the central pipe 3 can be directly connected to the sewage, and pipe dredging agents, hot water, and other substances can be inserted into the deeper part of the pipe through the rear end of the central pipe 3 to facilitate targeted dredging in the deeper part of the pipe. If necessary, air ventilation and sewage suction operations can also be performed to increase the dredging means.

[0038] In the preferred embodiment, the bottom end of each sinking air slot 204 is provided with a through hole 205, and the side wall of the rear pipe section 2 is provided with a plurality of pipe penetrating holes 206 that communicate with the through holes 205. The clamping cavity 301 is also provided with a gas guide pipe 12, and the front end of the gas guide pipe 12 penetrates through the pipe penetrating hole 206 and is inserted into the through hole 205.

[0039] The rear end of the gas guide pipe 12 and the rear end of the imaging optical fiber 13 are connected to the external second gas supply system 16 after penetrating out of the rear end of the clamping cavity 301.

[0040] In the preferred embodiment, the front end and the rear end of the rear pipe section 2 are respectively provided with a front support ring 10 and a rear support ring 11. The front support ring 10 and the rear support ring 11 are provided with a plurality of distribution holes 1001 along the circumference. Each gas guide pipe 12 and imaging optical fiber 13 penetrates through each distribution hole 1001.

[0041] The distribution holes 1001 of the front support ring 10 and the rear support ring 11 are uniformly distributed in the circumferential direction, which can ensure that the gas pipes and optical fibers are evenly distributed in the clamping cavity 301 and do not entangle or knot, thereby preventing the inner wall of the front pipe section 1 and the rear pipe section 2 from being squeezed and affecting the swing angle of the front pipe section 1.

[0042] The plurality of imaging optical fibers 13 are finally combined in the sleeve 14 at the front end.

[0043] The illumination optical fiber 1301 is arranged in a ring shape in the bundle 14, and the illumination optical fiber 1301 is arranged in the center of the ring. The gap is filled with glue. The imaging optical fiber 13 emits light through the transparent end piece 15 to irradiate the inside of the pipeline. The reflected light is received by each imaging optical fiber 13 and transmitted to the external imaging system 17. The imaging system 17 feeds back the blockage condition or the curved condition in the pipeline, and feeds back the deflection position in the pipeline. In time, the corresponding elastic membrane 207 is adjusted to change the inflation state, the angle of the front pipe section 1 is changed, and the gap can pass through the curved part of the pipeline and some impurities.

[0044] In the preferred scheme, a flexible inflation cover 7 is arranged outside the front pipe section 1 and the rear pipe section 2. One end of the inflation cover 7 is connected to the front end of the front pipe section 1. The other end of the inflation cover 7 is connected to the rear end of the rear pipe section 2. A plurality of air holes 201 are arranged on the side wall of the rear end of the rear pipe section 2 in the circumferential direction. The inflation cover 7 is inflated by air entering the clamping cavity 301.

[0045] During pigging, the feeding direction is the front end, and the retraction direction is the rear end.

[0046] The front end of the front pipe section 1 and the rear end of the rear pipe section 2 are provided with a connecting flange 701, which is connected to and sealed with the two ports of the inflation cover 7.

[0047] When the front pipe section 1 and the rear pipe section 2 are advanced, the inflation cover 7 needs to be attached to the surface as much as possible to reduce the cross-sectional diameter, so as to avoid being blocked or scratched by impurities along the way. If the front pipe section 1 and the rear pipe section 2 are integrated and cannot be stretched, in order to make the central part of the inflation cover 7 inflated to contact the pipe wall, the flexibility of the inflation cover 7 itself needs to be excellent. Since the central part of the inflation cover 7 becomes thin when inflated, in order to avoid the inflation cover 7 being scratched by impurities, the inflation cover 7 generally needs to have a certain thickness, but this will also limit the inflation performance of the inflation cover 7. Therefore, the rear pipe section 2 is designed to be stretchable. When the inflation cover 7 needs to be inflated, the rear pipe section 2 is retracted to reserve an inflation allowance for the inflation cover 7. In this state, the inflation cover 7 is filled with gas and the material of the inflation cover 7 does not stretch sharply, and the inflation cover 7 already has a certain size and is close to the inner wall of the pipeline, so that the inflation cover 7 has both scratch resistance and good inflation performance.

[0048] The center pipe 3 and the outer sleeve pipe 4 have a certain flexibility and can be bent appropriately, and at the same time have a certain rigidity and can push the front pipe section 1 and the rear pipe section 2 to advance.

[0049] An end ring 5 is arranged at the tail end of the center pipe 3 and the outer sleeve pipe 4, which can block the port of the clamping cavity 301. The end ring 5 is provided with an air outlet, which can be connected to the first gas supply system 6 outside. The first gas supply system 6 is provided with a gas source and a gas valve, which can supply air to the clamping cavity 301 or exhaust air from the clamping cavity 301.

[0050] At the beginning, the rear pipe section 2 extends out of the front pipe section 1, the expansion cover 7 can be made of rubber or silica gel, and is attached to the outer surface of the front pipe section 1 and the rear pipe section 2. The tail end of the center pipe 3 and the outer sleeve pipe 4 can be held to send the front pipe section 1 and the rear pipe section 2 into the rear branch of the oil separation tank to dredge the pipeline. When a certain depth is reached, the center pipe 3 is moved forward by a certain distance to make the rear pipe section 2 enter the front pipe section 1, so that the expansion cover 7 is relaxed, the clamping cavity 301 is ventilated to make the expansion cover 7 expand, the cross section of the device is increased, the cross section available for cleaning the pipeline is increased, or the expansion cover 7 is expanded to be close to the inner wall of the rear branch. At this time, the center pipe 3 and the outer sleeve pipe 4 are pulled back and forth synchronously to dredge the pipeline and clean the stubborn dirt attached to the inner wall of the rear branch.

[0051] The front pipe section 1 and the rear pipe section 2 can not only change the total length, but also change the angle, so as to adapt to pass through some corner positions or some gaps of sundries in the pipeline to be cleaned, avoid being stuck on the inner wall of the rear branch, and also avoid being blocked by the sundries or being pushed deeper.

[0052] Because of the sundries attached to the inner wall of the pipeline, if the air pressure is too large when the expansion cover 7 is pressed against the inner wall of the pipeline, the pipeline may be damaged or the expansion cover 7 may be torn, but if the air pressure is too small, the outer wall of the expansion cover 7 is easily pressed to be concave, and it is difficult to remove the sundries attached tightly.

[0053] In the preferred scheme, the outer wall of the front end of the front pipe section 1 is provided with a plurality of first support rods 102 which are hinged in the circumferential direction, the outer wall of the rear end of the rear pipe section 2 is provided with a plurality of second support rods 203 which are hinged in the circumferential direction, each first support rod 102 is hinged with each second support rod 203, and the expansion cover 7 covers the outside of the first support rod 102 and the second support rod 203.

[0054] The first support rod 102 and the second support rod 203 serve as the internal framework of the expansion cover 7. When the rear pipe section 2 is retracted into the front pipe section 1, the hinge points of the first support rod 102 and the second support rod 203 will be stretched outward to support the expansion cover 7 to make it contact the inner wall of the pipeline. At this time, air is filled into the expansion cover 7 to make the remaining positions without framework bulge and contact the inner wall of the pipeline. Even if there are sundries attached tightly, they will be pushed away under the pushing force of the framework.

[0055] Because the expansion cover 7 covers the outside, the hinge points of the first support rod 102 and the second support rod 203 will not contact the sundries, oil stains and the like, so it is not necessary to clean every time, and the risk of the sundries winding around the framework is also avoided.

[0056] In the preferred scheme, the rear end of the rear pipe section 2 is sleeved with a rear end sleeve 8, the rear end sleeve 8 is provided with a plurality of strip-shaped sliding clamping grooves 801 which are arranged in parallel in the circumferential direction, each sliding clamping groove 801 is provided with a floating hinge terminal 802 which is slidable, and each floating hinge terminal 802 is hinged with each second support rod 203.

[0057] The sliding clamping groove 801 is blocked at both ends to avoid the floating hinged terminal 802 from slipping off.

[0058] When the rear pipe section 2 is retracted into the front pipe section 1, the sliding clamping groove 801 can be used as the air passage communication hole 201 and the inflation cover 7.

[0059] When the rear pipe section 2 is pivoted relative to the front pipe section 1, the first support rod 102 and the second support rod 203 change in posture, and the positions of the floating hinged terminals 802 are adaptively adjusted.

[0060] In the preferred scheme, the front end of the front pipe section 1 is sleeved with a front end sleeve 106, the front end sleeve 106 is provided with a plurality of fixed hinged terminals 107 in the circumferential direction, and the front end of each first support rod 102 is hinged to the fixed hinged terminal 107.

[0061] The rear end sleeve 8 can be threadedly connected with the rear pipe section 2, the inside of the front end sleeve 106 is coated with glue, and the front end sleeve 106 is sleeved with the front pipe section 1 and adjusted to align the fixed hinged terminals 107 with the floating hinged terminals 802, and a hole can be punched in the side wall of the front end sleeve 106 and fastened to the outer wall of the front pipe section 1 through a jackscrew for reinforced connection.

[0062] In the preferred scheme, the inner wall of the inflation cover 7 is provided with a plurality of connection bands 702, the first support rod 102 and the second support rod 203 are provided with a plurality of connection holes 302, and each connection band 702 is connected at each connection hole 302.

[0063] The middle part of the inflation cover 7 is fixed on the first support rod 102 and the second support rod 203 to avoid the inflation cover 7 from being freely floating and being scratched by sundries when it is in a relaxed state.

[0064] The front end of the front end sleeve 106 and the rear end of the rear end sleeve 8 are provided with outwardly protruding connection flanges 701, and the two ends of the inflation cover 7 are connected to the connection flanges 701, respectively.

[0065] The connection flanges 701 are arranged with threaded holes in the circumferential direction, the ports of the inflation cover 7 are fixed on the connection flanges 701 through large-head screws, and the joints are coated with glue for adhesion and sealing.

[0066] In the preferred scheme, the rear end of the rear end sleeve 8 is provided with a threaded connection pipe joint ring 9 in the inner wall, and the outer sleeve pipe 4 is sleeved on the pipe joint ring 9.

[0067] The inner wall of the port of the outer sleeve pipe 4 is coated with glue and inserted into the outer wall of the rear end of the pipe joint ring 9, and an iron wire can be wound and tied for reinforcement.

[0068] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be the technical solutions recited in the claims, including equivalent replacement schemes of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. A device for unclogging grease trap pipes, characterized in that: The utility model provides a kind of telescopic tube, including front pipe section (1), rear pipe section (2) is sleeved in front pipe section (1), front pipe section (1) and rear pipe section (2) sliding connection, rear pipe section (2) rear end is connected with sleeve tube (4), the inside of front pipe section (1) front end is equipped with center tube (3), center tube (3) rear end passes through rear pipe section (2) and the inside of sleeve tube (4), rear pipe section (2) front end outer wall is equipped with limit sleeve (202), front pipe section (1) rear end is equipped with outer expansion section (103), the inner diameter of outer expansion section (103) rear end is greater than the outer diameter of limit sleeve (202), outer expansion section (103) rear end is equipped with limit ring (101), the outer diameter of limit sleeve (202) is greater than the inner diameter of limit ring (101), limit ring (101) is used to stop limit sleeve (202), rear pipe section (2) outer wall diameter is less than the inner diameter of limit ring (101), limit sleeve (202) outer wall is equipped with multiple interval distribution's subsidence air groove (204) along circumference, each subsidence air groove (204) is equipped with inflatable elastic film (207), elastic film (207) extrusion outer expansion section (103) inner wall to make front pipe section (1) swing relative to rear pipe section (2).

2. The device according to claim 1, characterized in that: Front pipe section (1) front end is equipped with inner shrink section (104), and inner shrink section (104) is equipped with sealing ring (105) between center tube (3), and sealing ring (105) is hollow in the center, and center tube (3) front end is inserted into the center of sealing ring (105), and sealing ring (105) is equipped with multiple sheaths (14) along circumference, and sheath (14) front end is equipped with transparent end piece (15), and center tube (3) and sleeve tube (4) are equipped with clamping cavity (301), and clamping cavity (301) is equipped with multiple imaging optical fibers (13), and each imaging optical fiber (13) front end is inserted into sheath (14).

3. The device according to claim 2, characterized in that: Each subsidence air groove (204) bottom end is equipped with through hole (205), and rear pipe section (2) side wall is equipped with multiple pipe penetrating holes (206) communicated with each through hole (205), and clamping cavity (301) is further equipped with air guide pipe (12), and air guide pipe (12) front end passes through pipe penetrating hole (206) and is inserted into through hole (205).

4. The device according to claim 3, characterized in that: Rear pipe section (2) inner front end and rear end are respectively equipped with front support ring (10) and rear support ring (11), and front support ring (10) and rear support ring (11) are equipped with multiple distribution holes (1001) along circumference, and each air guide pipe (12) and imaging optical fiber (13) pass through each distribution hole (1001).

5. The device according to claim 1, characterized in that: It is further equipped with flexible expansion cover (7) coated on the outside of front pipe section (1) and rear pipe section (2), one end of expansion cover (7) is connected in front pipe section (1) front end, the other end of expansion cover (7) is connected in rear pipe section (2) rear end, and rear pipe section (2) rear end side wall is equipped with multiple air holes (201) along circumference, and clamping cavity (301) is ventilated to make expansion cover (7) expand.

6. The device according to claim 5, characterized in that: Front pipe section (1) front end outer wall is equipped with multiple hinged first support rods (102) along circumference, and rear pipe section (2) rear end outer wall is equipped with multiple hinged second support rods (203) along circumference, each first support rod (102) is hinged with each second support rod (203), and expansion cover (7) covers the outside of first support rod (102) and second support rod (203).

7. The device according to claim 6, characterized in that: The rear pipe section (2) is sleeved with a rear end sleeve (8), the rear end sleeve (8) is provided with a plurality of parallel strip-shaped sliding clamping grooves (801) in the circumferential direction, each sliding clamping groove (801) is provided with a slidable floating hinge terminal (802), and each floating hinge terminal (802) is hinged with each second supporting rod (203).

8. The device according to claim 7, characterized in that: The front pipe section (1) is sleeved with a front end sleeve (106), the front end sleeve (106) is provided with a plurality of fixed hinge terminals (107) in the circumferential direction, and each first supporting rod (102) is hinged with the fixed hinge terminal (107) at the front end.

9. The device according to claim 6, characterized in that: The inner wall of the expansion cover (7) is provided with a plurality of connecting bands (702), each first supporting rod (102) and second supporting rod (203) are provided with a plurality of connecting holes (302), and each connecting band (702) is connected at each connecting hole (302).

10. The device according to claim 7, characterized in that: The rear end sleeve (8) is provided with a threaded pipe joint ring (9) on the inner wall of the rear end, and the outer sleeve pipe (4) is sleeved on the pipe joint ring (9).

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