Composite plastic drilling rig for nonmetal pipeline area detection

Abstract

The utility model discloses a composite type plastic drilling rig for detecting a non-metal pipeline area, which comprises a drill rod and a drill bit which are detachably connected, the drill rod is a hollow drill rod, the drill bit is a circular-tube-shaped drill bit made of flexible materials, the inside of the drill rod is communicated with the inside of the drill bit, and the drill bit is a hollow drill rod. The first end of the drill bit is connected with the drill rod, the end face of the second end of the drill bit is constructed to be of a structure with a water outlet hole and cutting teeth, the water outlet hole is a through groove formed in the radial direction of the end face of the second end of the drill bit, and the water outlet hole is communicated with the interior of the drill bit. According to the utility model, the mechanical damage to the non-metal pipeline can be avoided during the penetration of the drill bit, the drilling process of a water flushing method can be realized, and the application range of the drill bit is expanded.

Description

TECHNICAL FIELD

[0001] The utility model relates to survey equipment technical field, concretely relates to a composite plastic drilling device for nonmetal pipeline area detection. BACKGROUND

[0002] When detecting underground pipeline, the general operation mode is drilling hole by drilling machine, and the pipeline buried position and depth are detected by drilling bit touch detection.

[0003] During drilling, the traditional metal drill bit such as diamond drill bit and hard alloy drill bit is easy to cause pipeline damage due to mechanical collision in nonmetal pipeline area, and the pipeline buried depth cannot be accurately judged during touch detection. UTILITY MODEL CONTENTS

[0004] The utility model discloses a composite plastic drilling device for nonmetal pipeline area detection, which can avoid mechanical damage to nonmetal pipeline during drilling bit touch detection, realize water flushing drilling process, expand the use range of drill bit, and improve detection accuracy.

[0005] The utility model discloses a composite plastic drilling device for nonmetal pipeline area detection, which can avoid mechanical damage to nonmetal pipeline during drilling bit touch detection, realize water flushing drilling process, expand the use range of drill bit, and improve detection accuracy.

[0006] A composite plastic drilling device for nonmetal pipeline area detection, comprising a drill rod and a drill bit connected detachably, the drill rod is a hollow drill rod, the drill bit is a round pipe-shaped drill bit made of flexible material, the inside of the drill rod is communicated with the inside of the drill bit, the first end of the drill bit is connected with the drill rod, the second end face of the drill bit is structured as a structure with water outlet holes and cutting teeth, the water outlet holes are radial through grooves opened along the second end face of the drill bit, and the water outlet holes are communicated with the inside of the drill bit.

[0007] The drill rod is used for being connected with a drilling machine, and drilling work is realized by driving the drill rod and the drill bit to rotate together through the drilling machine. The drill bit is made of flexible material, and the flexible material generally refers to non-metallic material, including but not limited to plastic or composite material. The drill bit is made of flexible material, and when conventional sounding is performed by using the drill bit, if the cutting tooth of the drill bit contacts the non-metallic pipeline, the non-metallic pipeline will not be damaged, and when the drill bit is blocked by the non-metallic pipeline, the position and the burial depth of the pipeline can be preliminarily determined, which is helpful to improve the detection accuracy. The drill bit is provided with a water outlet hole, and water flushing drilling can be realized. Water is injected into the hollow drill rod through a high-pressure water pump, and high-pressure water is sprayed from the water outlet hole after passing through the drill rod and the drill bit to impact the area to be drilled. If there is no non-metallic pipeline, the drill bit can naturally sink under the action of little resistance. When the non-metallic pipeline is encountered, the drill bit is blocked and no longer sinks, and the position of the non-metallic pipeline can be determined by slight sounding. Therefore, when the drill bit is used for verifying drilling in a fuzzy sounding area, the pipeline can be accurately positioned by combining the shape of the drill cuttings and the change of the drilling resistance.

[0008] Because the drill bit is hollow and has a water outlet hole to form a water flow channel, the water flow channel can also serve as a cooling liquid channel of the drill bit, so that the purpose of heat exchange and cooling of the drill bit is realized, and the strength of the drill bit is prevented from being reduced due to high temperature. Without the need to set other cooling liquid flow channels, space is effectively utilized, and the miniaturization design of the drill bit is facilitated.

[0009] The utility model also has the following preferred design:

[0010] The drill bit is configured to have a whole structure of a first part and a second part, the first part has the same diameter as the drill rod, and the second part is a tapered structure connected to the first part at the rear end and gradually decreasing in diameter from the rear end to the front end. The first part is set to have the same diameter as the drill rod, which facilitates the connection of the drill bit and the drill rod. In actual application, the drill bit and the drill rod can be threadedly fastened or fixedly connected in other mechanical forms. The front end of the drill bit, i.e. the second part, is set to have a tapered structure, which can reduce the contact area between the second end of the drill bit, i.e. the front end, and the non-metallic pipeline, reduce the risk of damage to the non-metallic pipeline, and also facilitate the improvement of the soil layer cutting efficiency.

[0011] As a further preferred design of the utility model, the included angle between the first part and the second part is 100°-120°, which can balance the chip removal and the soil layer cutting efficiency.

[0012] The second end surface of the drill bit is provided with a plurality of cutting teeth and water outlet holes in the circumferential direction, which is helpful to improve the drilling efficiency.

[0013] The utility model discloses a drill bit's inside is provided with the sheath that is attached with the inner wall of drill bit. The front and rear ends of sheath are through, and do not influence the flow channel of water. When the drill bit is drilling the sand, if part sand enters the drill bit, the sheath can block the sand in the drill bit and cause the impact to the inner wall of drill bit, and the sheath can protect the drill bit. Meanwhile, the sheath can also support the drill bit to indirectly improve the structural strength of drill bit.

[0014] The utility model discloses a drill bit is polyimide drill bit or polyether ether ketone drill bit, when the rotational speed of drill bit is less than or equal to 250r / min, the wear rate of drill bit to non - metallic pipeline is lower and the probability of crack is lower, can cover the drilling detection of various soil types such as clay, sand, broken stone.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The overall structure of the drill bit made of flexible material has cutting teeth and water outlet holes, which will not damage the non-metallic pipeline during sounding, and can also be used for water flushing drilling, having the functions of sounding and drilling, expanding the use range of the drill bit, and when sounding and drilling are cooperatively operated, the detection accuracy is ± 5cm, the damage rate of the non-metallic pipeline is less than or equal to 5%, the pipeline damage rate is reduced by more than 80% during construction, the detection and drilling period is shortened by 40%, and the comprehensive cost is reduced by 25%.

[0017] 2. The utility model discloses a polyimide drill bit or polyether ether ketone drill bit, which can cover various soil types such as clay, sand and broken stone for drilling detection, and the maximum detection depth reaches 30m.

[0018] 3. The drill rod and drill bit are hollow, and the flow channel communicated with the water outlet holes can be used as a high-pressure water channel during water flushing drilling, or as a cooling liquid channel of the drill bit, effectively utilizing the space of the drill bit and being beneficial to the miniaturization design of the drill bit.

[0019] 4. The drill bit is provided with a sheath, which can block the impact of the sand in the drill bit on the inner wall of the drill bit and protect the drill bit. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the appearance view of a composite plastic drilling device for non-metal pipeline area detection of the utility model;

[0021] Figure 2 It is the second end face structure diagram of a drill bit in the embodiment.

[0022] Mark explanation: 10, drill rod; 20, drill bit; 201, first end; 202, second end; 21, first part; 22, second part; 30, water outlet hole; 40, cutting tooth. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] EMBODIMENT

[0026] Please refer to Figure 1 and Figure 2 A composite plastic drilling device for non-metal pipeline area detection, comprising a detachably connected drill rod 10 and drill bit 20, the drill rod 10 is a hollow drill rod, the drill bit 20 is a round pipe-shaped drill bit made of flexible material, the inside of the drill rod 10 is in communication with the inside of the drill bit 20, the first end 201 of the drill bit 20 is connected with the drill rod 10, and the second end 202 of the drill bit 20 is configured as a structure having a water outlet hole 30 and a cutting tooth 40, the water outlet hole 30 is a radial through groove formed along the second end 202 of the drill bit 20, and the water outlet hole 30 is in communication with the inside of the drill bit 20.

[0027] In an embodiment, the drill bit 20 is configured as an integral structure having a first part 21 and a second part 22, the first part 21 has the same diameter as the drill rod 10, and the second part 22 is a tapered structure with a rear end connected to the first part 21 and a diameter gradually decreasing from the rear end to the front end. The first part 21 is arranged to have the same diameter as the drill rod 10, facilitating the connection of the drill bit 20 and the drill rod 10. In actual application, the drill bit 20 and the drill rod 10 can be threadedly fastened or fixedly connected in other mechanical forms. The front end of the drill bit 20, i.e. the second part 22, is arranged in a tapered structure, which can reduce the contact area between the second end 202, i.e. the front end, of the drill bit 20 and the non-metal pipeline, reduce the risk of damaging the non-metal pipeline, and also facilitate improving the soil layer cutting efficiency.

[0028] In an embodiment, the included angle a between the first part 21 and the second part 22 is 100°-120°, which can take into account the chip removal and soil layer cutting efficiency.

[0029] In an embodiment, the second end 202 of the drill bit 20 is provided with a plurality of cutting teeth 40 and water outlets 30 in a circumferential direction, which is conducive to improving the drilling efficiency.

[0030] In an embodiment, the drill bit 20 is internally provided with a sheath (not shown in the figure) that is attached to the inner wall of the drill bit 20. The front and rear ends of the sheath are through, and do not affect the water flow channel. When the drill bit 20 drills sand, if some sand enters the drill bit 20, the sheath can block the sand in the drill bit 20 from impacting the inner wall of the drill bit 20, thereby protecting the drill bit 20. At the same time, the sheath can also provide some support to the drill bit 20, thereby indirectly improving the structural strength of the drill bit.

[0031] In some embodiments, the drill bit 20 is a polyimide drill bit or a polyether ether ketone drill bit. When the rotation speed of the drill bit is ≤250 r / min, the drill bit has a low wear rate on non-metal pipelines and a low probability of crack generation, and can cover various soil types such as clay, sand, and gravel for drilling and detection, with a maximum detection depth of 30 m. Polyimide (PI for short) refers to a type of polymer containing an imide ring (-CO-NR-CO-) in the main chain, and is one of the organic high molecular materials with good comprehensive performance. Polyether ether ketone (PEEK) is a high polymer composed of a repeating unit containing a ketone bond and two ether bonds in the main chain structure, and belongs to a special high polymer material. It has physical and chemical properties such as high temperature resistance and chemical drug corrosion resistance, and is a semi-crystalline polymer material that can be used as a high-temperature structural material and an electrical insulating material, and can be compounded with glass fibers or carbon fibers to prepare reinforced materials. Polyether ether ketone has at least the advantages of high temperature resistance, self-lubrication, corrosion resistance, flame resistance, electrical properties, and hydrolysis resistance, so as to meet the use environment of the drill bit 20. When the material of the drill bit 20 is polyimide or polyether ether ketone, the drill bit 20 has high strength (bending strength ≥450 MPa), high temperature resistance (melting point > 300℃), and impact resistance.

[0032] The drill rod 10 is used for being connected with a drilling machine, and drilling work is realized by driving the drill rod 10 and the drill bit 20 to rotate together through the drilling machine. The drill bit 20 of the utility model is made of flexible material, and the flexible material generally refers to non-metallic material, including but not limited to plastic or composite material. The drill bit 20 is made of flexible material, and when the drill bit 20 is used for conventional sounding, if the cutting tooth 40 of the drill bit 20 contacts with the non-metallic pipeline, the non-metallic pipeline will not be damaged, and when the drill bit 20 is blocked by the non-metallic pipeline, the position and the burial depth of the pipeline can be preliminarily judged, and the detection accuracy is improved. The drill bit 20 of the utility model is provided with the water outlet hole 30, water flushing drilling can be realized, water is injected into the hollow drill rod 10 through the high-pressure water pump, the high-pressure water is sprayed from the water outlet hole 30 after passing through the drill rod 10 and the drill bit 20, and the position impacted by the high-pressure water is impacted, if there is no non-metallic pipeline, the drill bit can naturally sink under the condition of no resistance or small resistance. When the non-metallic pipeline is encountered, the drill bit 20 is blocked and no longer sinks, and the position of the non-metallic pipeline can be determined through slight sounding. Therefore, when the utility model verifies the drilling in the sounding fuzzy area, the pipeline can be accurately positioned in combination with the drill cutting shape and the drilling resistance change.

[0033] Because the drill bit is hollow and has the water outlet hole to form a water flow channel, the water flow channel can also be used as a cooling liquid channel of the drill bit, so that the purpose of heat exchange and cooling of the drill bit is realized, and the strength reduction caused by the high temperature of the drill bit is avoided. Other cooling liquid flow channels do not need to be arranged, space is effectively utilized, and the miniaturization design of the drill bit is facilitated.

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A composite plastic drilling device for non-metal pipeline area exploration, comprising a detachably connected drill rod (10) and a drill bit (20), characterized in that: The drill pipe (10) is a hollow drill pipe, the drill bit (20) is a round pipe-shaped drill bit made of flexible material, the inside of the drill pipe (10) is in communication with the inside of the drill bit (20), the first end (201) of the drill bit (20) is connected with the drill pipe (10), the second end (202) end face of the drill bit (20) is configured to have a structure with a water outlet hole (30) and a cutting tooth (40), the water outlet hole (30) is a through groove radially opened along the second end (202) end face of the drill bit (20), and the water outlet hole (30) is in communication with the inside of the drill bit (20). The drill bit (20) is configured to have an overall structure of a first part (21) and a second part (22), the first part (21) is the same in diameter as the drill pipe (10), and the second part (22) is a tapered structure with a rear end connected with the first part (21) and a diameter gradually decreasing from the rear end to the front end.

2. The composite plastic drilling apparatus for non-metallic pipeline area detection according to claim 1, characterized in that: The included angle (a) between the first part (21) and the second part (22) is 100°-120°.

3. The composite plastic drilling apparatus for non-metallic pipeline area detection according to claim 1, characterized in that: The second end (202) end face of the drill bit (20) is provided with a plurality of the cutting teeth (40) and the water outlet holes (30) at intervals in the circumferential direction.

4. The composite plastic drilling apparatus for non-metallic pipeline area detection according to claim 1, characterized in that: The inside of the drill bit (20) is provided with a sheath abutting against the inner wall of the drill bit (20).

5. The composite plastic drilling apparatus for non-metallic pipeline area detection according to claim 1, characterized in that: The drill bit (20) is a polyimide drill bit or a polyether ether ketone drill bit.

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