CN213278422U

CN213278422U - A ground connection drill rod for burying outer anticorrosive coating PCM of ground pipe detects

Info

Publication number: CN213278422U
Application number: CN202022551026.9U
Authority: CN
Inventors: 周忠贺; 李宇航; 周忠昌; 王和静; 王亚东; 周敬德; 许皆乐
Original assignee: Zhejiang Institute of Special Equipment Science
Current assignee: Zhejiang Institute of Special Equipment Science
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-05-25
Anticipated expiration: 2030-11-06

Abstract

The utility model provides a ground connection drill rod for outer anticorrosive coating PCM of buried pipeline detects, including wiring handle, a plurality of ground connection steel pipe and tube head, wiring handle and ground connection steel pipe spiro union, spiro union between the ground connection steel pipe, bottommost ground connection steel pipe and tube head spiro union are equipped with the water injection hole on the tube head. The utility model has the advantages that: structural design is reasonable, easy operation, and convenient to carry is difficult for buckling, can insert the soil depths more, guarantees that signal transmitter can produce enough big current value, the ground connection drill rod of burying ground pipeline outer anticorrosive coating integrality detection is accomplished to higher efficiency.

Description

A ground connection drill rod for burying outer anticorrosive coating PCM of ground pipe detects

Technical Field

The utility model relates to a special equipment technical field, concretely relates to a ground connection drill rod for buried pipeline outer anticorrosive coating PCM detects.

Background

For the oil or gas transmission pipeline which is laid underground, the integrity of the outer anticorrosive coating of the pipeline directly influences the intrinsic safety of the underground pipeline, so that the integrity of the outer anticorrosive coating of the pipeline is ensured to have important significance for the safe operation of the pipeline. The multi-frequency pipe medium current detection method (PCM) is widely applied to integrity detection of the outer anticorrosive coating of the buried pipeline due to simple operation and strong pipeline positioning function. Although the PCM detection method is widely applied to detection of the integrity of corrosion protection outside a pipeline, problems which are difficult to solve are still encountered in field application, for example, the current generated by a signal transmitter cannot reach an expected value due to overlarge grounding resistance or low soil water content, weak conductivity and the like, so that the detection distance and precision of a buried pipeline are influenced, defects are easy to generate, and the detection omission is easy to occur, and on the other hand, the energy consumption of equipment is increased, the detection time is shortened, and the working efficiency is influenced.

In order to make the current generated by the signal transmitter reach the expected value, the tester usually inserts a plurality of grounding steel rods to increase the contact area of the soil, and fills the solution containing sodium chloride into the holes of the grounding steel rods to improve the conductivity of the soil, so that the signal transmitter can generate the expected current value. But the water content of the soil in a part of loess high slope area is extremely low, the expected current value can not be reached after a plurality of grounding steel rods are inserted and sodium chloride solution is poured, the expected current value can be reached only by inserting the grounding steel rods with longer length into deeper soil with relatively higher water content, however, firstly, the field vehicle is inconvenient to carry overlong grounding steel rods and unsafe, secondly, a detector is easy to bend when knocking the overlong grounding steel rods into underground soil by using an iron hammer, therefore, the field still has no grounding steel rods which can meet the working condition, the current value of signal emission is small when the field detection is carried out, the detection distance is shortened, the detection working efficiency is reduced, and the energy consumption of equipment is increased.

Disclosure of Invention

The utility model aims at providing an easy operation, convenient to carry, be difficult for buckling, can insert the soil depths more, guarantee that signal transmitter can produce enough big current value, accomplish ground connection drill rod that buries outer anticorrosive coating integrality of ground pipeline and detect more efficiently.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a ground connection drill rod for burying outer anticorrosive coating PCM of ground pipeline detects, includes wiring handle, a plurality of ground connection steel pipe and tube head, wiring handle and ground connection steel pipe spiro union, spiro union between the ground connection steel pipe, bottommost ground connection steel pipe and tube head spiro union are equipped with the water injection hole on the tube head.

Further, the wiring handle includes horizontal pole and standpipe, and the rubber pad is wrapped up along circumference in horizontal pole lower part, is equipped with the recess on the rubber pad.

Furthermore, a connecting plate is fixed in the middle of the vertical pipe of the wiring handle, two holes are formed in the connecting plate in a penetrating mode and can be used for fixing nuts, the bolt is in threaded connection with the nuts, a cotter pin is formed in one end of a screw rod of the bolt in a penetrating mode, and a wiring hole is formed in the other end of the screw rod.

Further, the tube head includes circular cone section and pipe section, be equipped with the water injection hole on the circular cone section, the center pin direction slope of water injection hole is upwards, the pipe section outside is equipped with the plane draw-in groove, and pipe section tip is equipped with the screw thread.

Furthermore, the tube head is sleeved with a rubber cap.

Furthermore, the outer side of the rubber cap is provided with a circumferential convex pattern.

Furthermore, plane grooves are formed in two ends of the grounding steel pipe respectively, a screw thread is arranged on the inner side of one end of the grounding steel pipe, and a screw thread is arranged on the outer side of the other end of the grounding steel pipe.

Compared with the prior art, the utility model, have following advantage:

the utility model relates to a ground connection drill rod for outer anticorrosive coating PCM of buried pipeline detects, structural design is reasonable, easy operation, convenient to carry, difficult buckling, can insert soil deeper, guarantee that signal transmitter can produce enough big current value, accomplish the ground connection drill rod that the outer anticorrosive coating integrality of buried pipeline detected more efficiently; the problem of need insert a plurality of ground connection drill rods of soil when current buried pipeline outer anticorrosive coating PCM detects is solved, the current value still can not reach the difficult problem of expectation current value after having solved soil moisture content low region and inserting a plurality of ground connection drill rods.

Drawings

Fig. 1 is the utility model relates to a structural schematic diagram of a ground connection drill rod that is used for burying outer anticorrosive coating PCM of ground pipeline to detect.

Fig. 2 is a schematic structural view of the wire connecting handle of the present invention.

Fig. 3 is a schematic structural view of the ground steel pipe of the present invention.

Fig. 4 is a schematic structural view of the tube head of the present invention.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in figure 1, a ground connection drill rod for buried pipeline outer anticorrosive coating PCM detects, including wiring handle 1, a plurality of ground connection steel pipe 2 and tube head 3, wiring handle 1 and ground connection steel pipe 2 spiro union, the spiro union between the ground connection steel pipe 2, bottommost ground connection steel pipe 2 and tube head 3 spiro union are equipped with water injection hole 302 on the tube head 3. The grounding steel pipes 2 can be connected by overlapping a plurality of each other according to the actual condition of the soil, so that the grounding steel rods can be deep into the soil, and the current value generated by the signal transmitter can reach the expected value.

As shown in fig. 2, the wire handle 1 includes a cross bar 101 and a vertical tube 104. Rubber pads 102 are glued and coated on the lower portion of the cross rod 101 along the circumferential direction, two rubber pads 102 are symmetrically arranged, and each rubber pad 102 occupies two thirds of the cross rod 101 along the circumferential direction; rubber pad 102 is not wrapped up on horizontal pole 101 upper portion to produce the resilience when avoiding the hammer to strike, influence safety. Four grooves 103 are arranged on the rubber pad 102, and the grooves 103 are designed by human engineering, so that the rubber pad is convenient for operators to hold. The central area of the cross rod 101 is fixedly connected with a vertical pipe 104, and the inner side of the bottom end of the vertical pipe 104 is provided with a screw thread. A connecting plate 105 is fixed in the middle of the vertical tube 104, two holes are formed in the connecting plate 105 for fixing nuts 108, bolts 106 are screwed in the nuts 108, cotter pins 107 are formed in one ends of screws of the bolts 106 in a penetrating mode to prevent the bolts 106 from falling off, and wiring holes 109 are formed in the other ends of the bolts 106. The head of the bolt 106 is hexagonal, and the central area of the bolt 106 is also provided with a hexagonal groove 110, so that the bolt 106 can be adjusted by an open end wrench and an inner hexagonal wrench, and the adjustment flexibility of the bolt 106 is improved.

As shown in fig. 3, two ends of each grounding steel tube 2 are respectively provided with a planar groove 202, so that a wrench can tighten the grounding steel tube 2 to perform a tightening operation; meanwhile, in order to reduce the resistance when the grounding steel pipe 2 sinks, the plane groove 202 and the outer side of the grounding steel pipe 2 are in arc transition. The inner side of one end of the grounding steel pipe 2 is provided with a first screw thread 203, the outer side of the other end of the grounding steel pipe 2 is provided with a second screw thread 204, the first screw thread 203 of one grounding steel pipe 2 can be mutually connected with the second screw thread 204 of the other grounding steel pipe 2, and a first rubber gasket 205 is embedded outside the bottom end of the second screw thread 204.

As shown in fig. 4, the cartridge 3 comprises a conical section 301 and a circular tube section 304. Three water injection holes 302 are uniformly distributed in the middle of the conical section 301, and the central axis direction of the water injection holes 302 inclines upwards, so that the water injection holes 302 are not blocked by soil when the conical section 301 sinks. The conical section 301 and the circular tube section 304 are connected integrally, a plane clamping groove 303 is formed in the outer side of the circular tube section 304, a third screw thread 306 is arranged at the end of the circular tube section 304, and a second rubber gasket 305 is embedded outside the bottom of the third screw thread 306. A rubber cap 4 is established to 3 covers of tube head, and the setting of rubber cap 4 is in order to wrap up tube head 3 with sharp-pointed tube head 3 damage to protection testing personnel do not receive the injury. The rubber cap 4 comprises a rubber housing 402 and a circumferential ridge 401 provided on the outside of the rubber housing 402 for facilitating the smooth removal of the rubber cap 4 from the ferrule 3.

The utility model relates to a theory of operation that is used for outer anticorrosive coating PCM of buried pipeline to detect ground connection drill rod does: screwing the tube head 3 with one end of the grounding steel tube 2, screwing the wiring handle 1 with the other end of the grounding steel tube 2, pulling off the rubber cap 4, selecting a proper soil position, knocking the upper part of the wiring handle 1 by an iron hammer, and inserting the grounding steel tube 2 into the ground; the wiring handle 1 is disassembled, a section of grounding steel pipe 2 is continuously added and screwed, the wiring handle 1 is connected, and the wiring handle is continuously beaten until the wiring handle is inserted underground; and (3) injecting a sodium chloride solution into the grounded steel pipe 2, wherein the sodium chloride solution flows down along the grounded steel pipe 2 and flows out of the water injection hole 302 of the pipe head 3 to be injected into the soil. The above process is repeated until the current value generated by the signal emitter reaches the desired value. After the detection is finished, the whole grounding steel rod is pulled out of the ground, and a tool kit is placed for standby after disassembly and arrangement.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a ground connection drill rod that is used for outer anticorrosive coating PCM of buried pipeline to detect which characterized in that: the grounding steel pipe comprises a wiring handle, a plurality of grounding steel pipes and a pipe head, wherein the wiring handle is in threaded connection with the grounding steel pipes, the grounding steel pipes are in threaded connection, the bottom grounding steel pipe is in threaded connection with the pipe head, and a water injection hole is formed in the pipe head.

2. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 1, characterized in that: the wiring handle comprises a cross rod and a vertical pipe, the lower portion of the cross rod is wrapped with a rubber pad along the circumferential direction, and a groove is formed in the rubber pad.

3. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 2, characterized in that: the connecting plate is fixed at the middle part of the vertical pipe of the wiring handle, two holes are arranged on the connecting plate in a penetrating mode and can be used for fixing nuts, the bolt is in threaded connection with the nuts, a split pin is arranged at one end of a screw rod of the bolt in a penetrating mode, and a wiring hole is formed in the other end of the screw rod.

4. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 1, characterized in that: the pipe head comprises a conical section and a circular pipe section, a water injection hole is formed in the conical section, the center shaft direction of the water injection hole is inclined upwards, a plane clamping groove is formed in the outer side of the circular pipe section, and screw threads are arranged at the end of the circular pipe section.

5. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 1 or 4, characterized in that: the tube head is sleeved with a rubber cap.

6. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 5, wherein: the outer side of the rubber cap is provided with a circumferential convex pattern.

7. The grounding steel chisel for PCM detection of the outer anticorrosive layer of the buried pipeline according to claim 1, characterized in that: the two ends of the grounding steel pipe are respectively provided with a plane groove, the inner side of one end of the grounding steel pipe is provided with a screw thread, and the outer side of the other end of the grounding steel pipe is provided with a screw thread.