Portable pressure pipeline thickness measuring device

Abstract

The utility model relates to the technical field of thickness measuring devices, in particular to a portable pressure pipeline thickness measuring device, which comprises a display screen, an ultrasonic detection probe, a probe connecting wire for connecting the display screen and the ultrasonic detection probe, and a telescopic supporting rod, the telescopic supporting rod is formed by embedding and connecting a first telescopic rod, a second telescopic rod and a third telescopic rod which are different in pipe diameter, the end, away from the second telescopic rod, of the first telescopic rod is fixedly connected with the coupling agent containing pipe, and the end, away from the second telescopic rod, of the third telescopic rod is provided with a locking assembly used for locking the ultrasonic detection probe; according to the portable pressure pipeline thickness measuring device, through the arrangement of the storage assembly, storage of redundant probe connecting wires is achieved, the probe connecting wires are effectively stored, disorder and disorder in a working area can be reduced, and the risk of stumbling and falling down is reduced. Therefore, the safety of workers can be guaranteed, and accidental injuries caused by disordered placement of the connecting wires can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thickness measuring devices, in particular to a portable pressure pipeline thickness measuring device. Background Art

[0002] Measuring equipment is a tool or device used to measure, detect, monitor or record physical quantities, chemical quantities or other specific parameters. During the extraction, transportation and storage of oil and natural gas, pipelines, containers, storage tanks and other equipment need to be inspected regularly to ensure their safety under high pressure, high temperature and corrosive environments. Ultrasonic thickness measuring devices can be used to monitor the wall thickness of these equipment.

[0003] After searching, the Chinese patent document announcement number: CN207963809U discloses an ultrasonic thickness measuring device for pressure-bearing equipment, which includes a thickness gauge, a retractable support rod and a handle; the thickness gauge includes a display screen, an ultrasonic detection probe and a probe connecting line; one end of the retractable support rod is connected to the handle, and the other end is provided with a probe clamping device, the probe clamping device is used to clamp the ultrasonic detection probe, the handle has a coupling agent accommodating chamber inside, a spiral coupling agent delivery hose is provided in the retractable support rod, one end of the spiral coupling agent delivery hose is connected to the coupling agent accommodating chamber, and the other end is connected to the nozzle, and a piston is also provided in the coupling agent accommodating chamber, and the piston is connected to a push-pull rod. The utility model has a reasonable structure, flexible use, and convenient carrying. It not only solves the problem of thickness measurement of pressure vessels and pressure pipes in narrow and confined spaces, but also protects the personal safety of inspectors during online inspection of high-temperature or low-temperature pressure-bearing equipment.

[0004] The beneficial effects of the above patent specification mention that "the clamping inner diameter of the clamping device of the detection probe can be changed as needed, and the detection probe can be replaced according to different inspection requirements. The improved ultrasonic thickness measuring device is provided with a coupling agent spraying device, which can spray the coupling agent on the detection wall surface more directly and specifically. The detection probe is portable and can make the detection probe better coupled with the wall surface, while improving the inspection efficiency." Although the above patent can spray the coupling agent on the detection wall surface more directly and specifically, the probe connection line is difficult to store in the prior art. When it is necessary to detect a higher or deeper part of the equipment, if the probe connection line is difficult to store effectively, it is easy to cause it to be hung by the protrusions around the inspected equipment during the inspection process, affecting the inspection quality. At the same time, after the inspection is completed, the probe connection line is difficult to collect. If it is placed in a messy way in the working area, it is easy to increase the risk of tripping or falling, and it is easy to cause damage or injury to the equipment or staff. The difficulty in storing the probe connection line will increase the time and effort of the operator when arranging or moving the equipment at work. This is easy to reduce work efficiency and easily lead to delays or failures in measurement tasks, so it needs to be improved. Utility Model Content

[0005] The utility model aims to provide a portable pressure pipe thickness measuring device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A portable pressure pipeline thickness measuring device comprises a display screen, an ultrasonic detection probe, a probe connecting line connecting the display screen and the ultrasonic detection probe, and a telescopic support rod, wherein the telescopic support rod is formed by an embedded connection of a first telescopic rod, a second telescopic rod and a third telescopic rod of different diameters, wherein one end of the first telescopic rod away from the second telescopic rod is fixedly connected to a coupling agent containing tube, and one end of the third telescopic rod away from the second telescopic rod is provided with a locking assembly for locking the ultrasonic detection probe; a nozzle is installed on the third telescopic rod, and a hose for conveying coupling agent is provided in the telescopic support rod, one end of the hose is connected to the nozzle, and the other end of the hose extends into the coupling agent containing tube, and a piston is provided in the coupling agent containing tube, and the piston is connected to a push-pull rod; a guide hole bracket for guiding the probe connecting line is installed on the side of the first telescopic rod and the third telescopic rod, and also comprises a storage assembly for storing the probe connecting line.

[0008] Preferably, the storage assembly includes a hollow box, a box cover threadedly connected to the hollow box, strip grooves are provided on both sides of the hollow box, and also includes a rotating column that passes through the box cover and is rotatably connected to the box cover, the bottom end of the rotating column is fixedly connected to a circular plate, the bottom of the circular plate is fixedly connected to two winding rods, the top of the rotating column is fixedly connected to a turntable, an eccentric handle is installed on the turntable, and also includes an adjusting bolt for locking the turntable, and the probe connecting line passes through the two strip grooves.

[0009] Preferably, the locking assembly includes a support plate and a fixed column installed on one side of the support plate, the support plate is fixedly connected to the top end of the third telescopic rod, two ends of the fixed column are respectively provided with a second accommodating groove and a first accommodating groove adapted to the size of the ultrasonic detection probe, a square groove connecting the first accommodating groove and the second accommodating groove is provided in the fixed column, a square block is fixedly connected to the ultrasonic detection probe, the square block is provided with a groove, a locking block adapted to the groove is slidably connected in the second accommodating groove, and also includes a compression spring, one end of the compression spring is fixedly connected to the inner wall of the second accommodating groove, and the other end of the compression spring is fixedly connected to an end of the locking block away from the square groove, and also includes a pressing drive assembly, which drives the locking block to slide.

[0010] Preferably, the pressing drive assembly includes a connecting rod and a pressing block. The top of the fixed column is provided with a through groove connected to the second accommodating groove. The pressing block passes through the through groove and is slidably connected to the through groove. One end of the connecting rod is rotatably connected to the bottom end of the pressing block, and the other end of the connecting rod is rotatably connected to the locking block.

[0011] Preferably, a T-shaped slide groove is provided at the bottom of the second accommodating groove along the length direction of the locking block, and a T-shaped slider is fixedly connected to the bottom of the locking block, and the T-shaped slider is slidably arranged in the T-shaped slide groove.

[0012] Preferably, a slot is provided on the lower portion of the outer side wall of the second telescopic rod, a protrusion is slidably provided in the slot, a spring is provided in the slot, one end of the spring is fixedly connected to the inner wall of the slot, and the other end of the spring is fixedly connected to the protrusion, the end of the protrusion away from the spring is hemispherical, and a slot hole matching the protrusion is provided on the upper portion of the side wall of the first telescopic rod.

[0013] Preferably, the inner walls of the first telescopic rod and the second telescopic rod are provided with guide grooves along their height directions, the outer walls of the second telescopic rod and the third telescopic rod are fixedly provided with guide sliders compatible with the guide grooves along their height directions, the guide slider on the second telescopic rod is slidably connected to the guide groove on the first telescopic rod, and the guide slider on the third telescopic rod is slidably connected to the guide groove on the second telescopic rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The portable pressure pipe thickness measuring device can store redundant probe connection wires through the arrangement of the storage assembly. Effective storage of the probe connection wires can reduce the clutter and confusion in the working area and reduce the risk of tripping and falling. This helps to ensure the safety of the staff and reduce accidental injuries caused by the messy placement of the connection wires. In addition, the arrangement of the retractable support rods in the utility model can retract the first retractable rod, the second retractable rod and the third retractable rod when not in use, saving space. The storage assembly can store the probe connection wires, so that the entire thickness measuring device can be effectively stored, which is convenient for carrying the thickness measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the pressure pipeline thickness measuring device of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the telescopic support rod and the coupling agent containing tube in the utility model.

[0018] Figure 3 It is a schematic diagram of the assembly of the fixed column and the ultrasonic detection probe in the utility model.

[0019] Figure 4 For the utility model Figure 3 Schematic diagram of part of the structure.

[0020] Figure 5 It is an exploded schematic diagram of the storage assembly in the present invention.

[0021] Figure 6It is a schematic structural diagram of the first telescopic rod and the second telescopic rod in the utility model.

[0022] Figure 7 For this utility model Figure 6 Schematic diagram of the structure at A in the middle.

[0023] The meanings of the numbers in the figure are as follows: 10, display screen; 11, probe connecting line; 12, ultrasonic detection probe; 120, square block; 121, groove; 20, coupling agent receiving tube; 21, piston; 22, push-pull rod; 23, hose; 24, nozzle; 30, first telescopic rod; 300, clamping hole; 31, second telescopic rod; 310, clamping slot; 311, spring; 312, bump; 32, third telescopic rod; 40, support Plate; 41, fixed column; 410, first accommodating groove; 411, second accommodating groove; 412, square groove; 413, T-shaped slide groove; 42, locking block; 420, T-shaped slider; 43, compression spring; 44, connecting rod; 45, pressing block; 5, guide hole bracket; 60, hollow box; 61, strip groove; 62, box cover; 63, rotating column; 64, round plate; 65, turntable; 66, winding rod; 67, handle; 68, adjusting bolt. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a technical solution:

[0026] A portable pressure pipe thickness measuring device, please refer to Figure 1-Figure 7 , including a thickness gauge, the thickness gauge includes a display screen 10, an ultrasonic detection probe 12, and a probe connecting line 11 for connecting the display screen 10 and the ultrasonic detection probe 12, and the thickness gauge is a thickness gauge of existing conventional technology;

[0027] The apparatus further comprises a telescopic support rod, which is formed by an embedded connection of a first telescopic rod 30, a second telescopic rod 31 and a third telescopic rod 32 of different diameters. One end of the first telescopic rod 30 away from the second telescopic rod 31 is fixedly connected to a coupling agent containing tube 20, in which a coupling agent is arranged. Specifically, a sample adding port can be opened at the upper part of the side wall of the coupling agent containing tube 20, and a sealing plug is threadedly connected to the sample adding port. After the sealing plug is removed, the coupling agent can be added to the coupling agent containing tube 20 from the sample adding port.

[0028] An end of the third telescopic rod 32 away from the second telescopic rod 31 is provided with a locking assembly for locking the ultrasonic detection probe 12;

[0029] Specifically, the locking assembly includes a support plate 40, a fixing column 41 fixedly installed on one side of the support plate 40, the support plate 40 is fixedly connected to the top end of the third telescopic rod 32, and the two ends of the fixing column 41 are respectively provided with a second accommodating groove 411 and a first accommodating groove 410 adapted to the size of the ultrasonic detection probe 12, a square groove 412 connecting the first accommodating groove 410 and the second accommodating groove 411 is provided in the fixing column 41, a square block 120 is fixedly connected to the ultrasonic detection probe 12, and a groove 121 is provided on the square block 120, and a locking block 42 adapted to the groove 121 is slidably connected in the second accommodating groove 411, and the length direction of the locking block 42 is perpendicular to the length direction of the square groove 412, and also includes a compression spring 43, one end of the compression spring 43 is fixedly connected to the inner wall of the second accommodating groove 411, and the other end of the compression spring 43 is fixedly connected to one end of the locking block 42 away from the square groove 412, and also includes a pressing drive assembly, by pressing the pressing drive assembly to drive the locking block 42 to slide.

[0030] like Figure 3-Figure 4 As shown, the pressing drive assembly includes a connecting rod 44 and a pressing block 45. The top of the fixed column 41 is provided with a through groove connected to the second accommodating groove 411. The pressing block 45 passes through the through groove and is slidably connected to the through groove. The connecting rod 44 is located in the second accommodating groove 411. One end of the connecting rod 44 is rotatably connected to the bottom end of the pressing block 45, and the other end of the connecting rod 44 is rotatably connected to the locking block 42.

[0031] A T-shaped slide groove 413 is provided at the bottom of the second receiving groove 411 along the length direction of the locking block 42 . A T-shaped slider 420 is fixedly connected to the bottom of the locking block 42 . The T-shaped slider 420 is slidably disposed in the T-shaped slide groove 413 .

[0032] When in use, the pressing block 45 is pressed downward, and the pressing block 45 can drive the connecting rod 44 to push the locking block 42 to slide toward the side of the compression spring 43, thereby compressing the compression spring 43. When the pressing block 45 is released, the elastic force of the compression spring 43 can push the locking block 42 to move to the rear of the square groove 412;

[0033] Specifically, when installing the ultrasonic detection probe 12, the user first presses the pressing block 45 downward, and the pressing block 45 can drive the connecting rod 44 to slide the locking block 42 toward the side of the compression spring 43, so that the locking block 42 moves away from the rear of the square groove 412, and then the user swings the ultrasonic detection probe 12 to the position as shown in FIG. Figure 3In the state shown, the square block 120 is inserted into the square groove 412 by aligning it with the first receiving groove 410, and the end of the square block 120 away from the ultrasonic detection probe 12 will extend into the second receiving groove 411, and the groove 121 will also extend into the second receiving groove 411. At this time, the pressing block 45 is slowly released, and the locking block 42 can be pushed to move and insert into the groove 121 under the elastic force of the compression spring 43, so that the ultrasonic detection probe 12 is locked in the first receiving groove 410;

[0034] Of course, if the ultrasonic detection probe 12 needs to be removed, the ultrasonic detection probe 12 can be directly removed from the first accommodating groove 410 by pressing the pressing block 45 again, so as to facilitate the inspection, maintenance and replacement of the ultrasonic detection probe 12 .

[0035] It is worth mentioning that a wiring hole communicating with the interior of the first receiving groove 410 is provided on the fixing column 41 , so that the probe connecting wire 11 can be inserted into the first receiving groove 410 to be connected with the ultrasonic detection probe 12 .

[0036] A nozzle 24 is installed on the third telescopic rod 32, and the liquid inlet end of the nozzle 24 extends into the third telescopic rod 32. A hose 23 for conveying a coupling agent is arranged in the telescopic support rod. The hose 23 is spiral in shape as a whole to adapt to the contraction of the telescopic rod. One end of the hose 23 is connected to the nozzle 24, and the other end of the hose 23 extends into the coupling agent receiving tube 20. A piston 21 is arranged in the coupling agent receiving tube 20, and a push-pull rod 22 is connected to the piston 21. By pushing the push-pull rod 22 upward, the coupling agent can be squeezed into the hose 23. The push-pull rod 22 in the utility model is a schematic diagram, and the actual length will be adjusted according to the length of the coupling agent receiving tube;

[0037] A guide hole bracket 5 for guiding the probe connecting wire 11 is installed on the side of the first telescopic rod 30 and the third telescopic rod 32. The guide hole bracket 5 is provided with a wire hole, and the probe connecting wire 11 is passed through the wire hole. The guide hole bracket 5 can prevent the probe connecting wire 11 from being knotted or entangled with each other.

[0038] In the utility model, a slot 310 is provided at the lower part of the outer wall of the second telescopic rod 31, a protrusion 312 is slidably provided in the slot 310, a spring 311 is provided in the slot 310, one end of the spring 311 is fixedly connected to the inner wall of the slot 310, and the other end of the spring 311 is fixedly connected to the protrusion 312, and the end of the protrusion 312 away from the spring 311 is hemispherical, and a slot 300 adapted to the protrusion 312 is provided on the upper part of the side wall of the first telescopic rod 30.

[0039] Of course, a slot 310 is also provided at the lower part of the outer wall of the third telescopic rod 32, and a protrusion 312 is slidably provided in the slot 310. A spring 311 is provided in the slot 310, and one end of the spring 311 is fixedly connected to the inner wall of the slot 310, and the other end of the spring 311 is fixedly connected to the protrusion 312. The end of the protrusion 312 away from the spring 311 is hemispherical, and a slot 300 matching the protrusion 312 is provided on the upper part of the side wall of the second telescopic rod 31.

[0040] In this way, when the telescopic rod needs to be stored, the user presses the protrusion 312 into the slot 310, and then pushes the second telescopic rod 31 or the first telescopic rod 30 to move downward for storage; when the telescopic rod needs to be extended, the second telescopic rod 31 or the first telescopic rod 30 is directly pulled, and when the slot 310 is aligned with the hole 300, the protrusion 312 can be pushed into the hole 300 under the elastic force of the spring 311, thereby locking the telescopic rods.

[0041] It is worth noting that the diameters of the card hole 300 and the card slot 310 can be set to a size that a finger can penetrate deeply, so that the user can press the protrusion 312 with his finger.

[0042] In the present invention, guide grooves are provided on the inner walls of the first telescopic rod 30 and the second telescopic rod 31 along their height directions, and guide sliders matched with the guide grooves are fixed on the outer walls of the second telescopic rod 31 and the third telescopic rod 32 along their height directions. The guide slider on the second telescopic rod 31 is slidably connected to the guide groove on the first telescopic rod 30, and the guide slider on the third telescopic rod 32 is slidably connected to the guide groove on the second telescopic rod 31. The guide grooves and the guide sliders are provided so that when the second telescopic rod 31 or the first telescopic rod 30 is telescoped, it can be extended along the axial direction of the telescopic rod without causing the second telescopic rod 31 or the first telescopic rod 30 to rotate, thereby facilitating the alignment of the clamping slot 310 with the clamping hole 300.

[0043] It should be supplemented that the first telescopic rod 30 and the second telescopic rod 31 are both hollow rods with openings at both ends, and the third telescopic rod 32 is a hollow tube with an opening at the bottom and a closed top.

[0044] It also includes a storage component for storing the probe connecting line 11.

[0045] See also Figure 5Specifically, the storage assembly includes a hollow box 60, a box cover 62 threadedly connected to the hollow box 60, strip grooves 61 are provided on both sides of the hollow box 60, and also includes a rotating column 63 that passes through the box cover 62 and is rotatably connected to the box cover 62, the bottom end of the rotating column 63 is fixedly connected to a circular plate 64, the bottom of the circular plate 64 is fixedly connected to two winding rods 66, the top of the rotating column 63 is fixedly connected to a turntable 65, an eccentric handle 67 is installed on the turntable 65, and also includes an adjusting bolt 68 for locking the turntable 65, the probe connecting line 11 passes through the two strip grooves 61, and the probe connecting line 11 passes through the middle of the two winding rods 66.

[0046] When it is necessary to store excess probe connecting wires 11, rotating the handle 67 clockwise can drive the turntable 65, the rotating column 63, the circular plate 64 and the winding rod 66 to rotate clockwise. The probe connecting wires 11 can be rolled up and stored in the hollow box 60 through the winding rod 66 to prevent the excess probe connecting wires 11 from being exposed outside.

[0047] A threaded hole is provided on the turntable 65, and an adjusting bolt 68 is threadedly connected to the threaded hole. When the adjusting bolt 68 is turned so that it is pressed against the box cover 62, the winding rod 66 can be prevented from rotating. When the adjusting bolt 68 is loosened, the handle 67 can be turned to drive the turntable 65, the rotating column 63, the circular plate 64 and the winding rod 66 to rotate.

[0048] When in use, first adjust the thickness gauge to be turned on, select the corresponding ultrasonic detection probe 12 for different pressure-bearing equipment, adjust the detection sound speed and calibrate on the display screen 10, then add the coupling agent into the coupling agent containing tube, make the added dosage reach the pushing push-pull rod and observe that the coupling agent at the nozzle is in a normal spraying state; hold the coupling agent containing tube, adjust the length of the telescopic support rod, make the nozzle reach the part of the equipment that needs to be detected, press the push-pull rod to make the nozzle spray an appropriate amount of coupling agent to the wall thickness measurement point, slightly move the coupling agent containing tube to couple the ultrasonic detection probe 12 with the detection wall surface, read the reading on the display screen 10 of the thickness gauge, and realize ultrasonic thickness measurement of the narrow and confined space of the pressure-bearing equipment.

Claims

1. A portable pressure pipe thickness measuring device, comprising a display screen (10), an ultrasonic detection probe (12), and a probe connecting line (11) connecting the display screen (10) and the ultrasonic detection probe (12), characterized in that: The invention also comprises a telescopic support rod, which is formed by an embedded connection of a first telescopic rod (30), a second telescopic rod (31) and a third telescopic rod (32) of different diameters; one end of the first telescopic rod (30) away from the second telescopic rod (31) is fixedly connected to a coupling agent containing tube (20); one end of the third telescopic rod away from the second telescopic rod is provided with a locking assembly for locking the ultrasonic detection probe (12); a nozzle (24) is installed on the third telescopic rod (32); and a nozzle (24) is installed inside the telescopic support rod. A hose (23) for conveying a coupling agent, one end of the hose (23) is connected to a nozzle (24), and the other end of the hose (23) extends into a coupling agent receiving tube (20), a piston (21) is provided in the coupling agent receiving tube (20), and the piston (21) is connected to a push-pull rod (22); a guide hole bracket (5) for guiding a probe connecting line (11) is installed on the side of the first telescopic rod (30) and the third telescopic rod (32), and also includes a storage component for storing the probe connecting line (11).

2. A portable pressure pipe thickness measuring device according to claim 1, characterized in that: The storage assembly comprises a hollow box (60), a box cover (62) threadedly connected to the hollow box (60), strip grooves (61) are arranged on both sides of the hollow box (60), and a rotating column (63) penetrating the box cover (62) and rotatably connected to the box cover (62), a circular plate (64) is fixedly connected to the bottom end of the rotating column (63), two winding rods (66) are fixedly connected to the bottom of the circular plate (64), a turntable (65) is fixedly connected to the top end of the rotating column (63), an eccentric handle (67) is installed on the turntable (65), and an adjusting bolt (68) for locking the turntable (65) is also included, and the probe connecting line (11) passes through the two strip grooves (61).

3. A portable pressure pipe thickness measuring device according to claim 1, characterized in that: The locking assembly comprises a support plate (40), a fixing column (41) installed on one side of the support plate (40), the support plate (40) being fixedly connected to the top end of the third telescopic rod (32), the fixing column (41) having a second accommodating groove (411) and a first accommodating groove (410) matching the size of the ultrasonic detection probe (12) at both ends, a square groove (412) connecting the first accommodating groove (410) and the second accommodating groove (411) being provided in the fixing column (41), and the ultrasonic detection probe (12) A square block (120) is fixedly connected to the upper part, a groove (121) is provided on the square block (120), a locking block (42) adapted to the groove (121) is slidably connected in the second accommodating groove (411), and also includes a compression spring (43), one end of the compression spring (43) is fixedly connected to the inner wall of the second accommodating groove (411), and the other end of the compression spring (43) is fixedly connected to an end of the locking block (42) away from the square groove (412), and also includes a pressing drive component, which drives the locking block (42) to slide.

4. A portable pressure pipe thickness measuring device according to claim 3, characterized in that: The pressing drive assembly comprises a connecting rod (44) and a pressing block (45); a through groove communicating with the second accommodating groove (411) is provided at the top of the fixing column (41); the pressing block (45) passes through the through groove and is slidably connected with the through groove; one end of the connecting rod (44) is rotatably connected to the bottom end of the pressing block (45); and the other end of the connecting rod (44) is rotatably connected to the locking block (42).

5. A portable pressure pipe thickness measuring device according to claim 3, characterized in that: A T-shaped slide groove (413) is provided at the bottom of the second accommodating groove (411) along the length direction of the locking block (42), and a T-shaped slider (420) is fixedly connected to the bottom of the locking block (42), and the T-shaped slider (420) is slidably arranged in the T-shaped slide groove (413).

6. A portable pressure pipe thickness measuring device according to claim 1, characterized in that: A slot (310) is provided at the lower portion of the outer wall of the second telescopic rod (31), a protrusion (312) is slidably provided in the slot (310), a spring (311) is provided in the slot (310), one end of the spring (311) is fixedly connected to the inner wall of the slot (310), the other end of the spring (311) is fixedly connected to the protrusion (312), the end of the protrusion (312) away from the spring (311) is in a hemispherical shape, and a slot (300) adapted to the protrusion (312) is provided at the upper portion of the side wall of the first telescopic rod (30).

7. A portable pressure pipe thickness measuring device according to claim 1, characterized in that: The inner walls of the first telescopic rod (30) and the second telescopic rod (31) are both provided with guide slide grooves along their height directions, and the outer walls of the second telescopic rod (31) and the third telescopic rod (32) are both fixedly provided with guide slide blocks matched with the guide slide grooves along their height directions, the guide slide block on the second telescopic rod (31) is slidably connected to the guide slide groove on the first telescopic rod (30), and the guide slide block on the third telescopic rod (32) is slidably connected to the guide slide groove on the second telescopic rod (31).

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