A laser positioning device for ray detection of storage tanks

Abstract

The present invention relates to the technical field of laser positioning devices, and discloses a laser positioning device for storage tank radiation detection, including a shell, wherein an azimuth adjustment mechanism is provided inside the shell, wherein the azimuth adjustment mechanism includes a turntable, wherein the outer wall of the turntable is movably sleeved at the bottom of the shell, and a horizontal laser is provided at the bottom of the shell. The present invention facilitates driving the horizontal laser to rotate horizontally and adjusts the azimuth of the horizontal laser by adopting the arrangement of a turntable, a limit block, an annular limit groove, a protective cover, a protective cap, a No. 1 knob, a worm, a worm wheel, a connecting shaft, a driving gear plate, a driven gear plate and a rotating shaft, so as to generate a laser beam through the horizontal laser to irradiate the weld, thereby generating an auxiliary laser straight line at the weld, positioning the radiation detection instrument when detecting the weld, and facilitating the auxiliary radiation detection instrument to perform radiation detection on the weld along the laser beam, thereby improving the detection efficiency and reducing the detection difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of laser positioning devices, and more specifically to a laser positioning device for ray detection of storage tanks. Background Art

[0002] Storage tanks are sealed containers for storing liquids or gases, and are widely used in chemical, oil refining, and storage and transportation systems. They can store various chemicals, such as acids, alkalis, alcohols, gases, and liquid extracts. For example, large double-disc floating roof oil tanks are equipment for storing oil products. At present, the bottom plate of large storage tanks is welded by several plates, the most common of which is a rectangular medium plate. After the bottom plate of the storage tank is welded, the weld needs to be radiographically inspected. The main function of radiographic inspection of the weld of the bottom plate of the storage tank is to ensure the quality of welding and prevent safety accidents. Radiographic inspection uses X-rays or gamma rays to penetrate the material, and uses the principle of uneven absorption of rays in the material to display images of internal defects. It is suitable for detecting defects such as weld quality and internal pores.

[0003] However, when performing radiographic inspection on the weld seams of the tank bottom plate, the radiographic inspection instrument is required to move along the weld seams. Traditional positioning methods often rely on manually drawing auxiliary straight lines on the tank bottom plate to help the inspection instrument move straight, but the line drawing operation is cumbersome and inefficient. In addition, when performing radiographic inspection in dim light, it is difficult for the inspectors to see the drawn auxiliary lines clearly. If the inspection instrument is not carefully operated, it is easy to deviate, resulting in missed inspections. This needs to be improved. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a laser positioning device for tank radiation detection to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a laser positioning device for ray detection of a storage tank, comprising a shell, an azimuth adjustment mechanism is arranged inside the shell, the azimuth adjustment mechanism comprises a turntable, the outer wall of the turntable is movably sleeved at the bottom of the shell, a horizontal laser instrument is arranged at the bottom of the shell, the top of the horizontal laser instrument is overlapped at the bottom of the turntable, a driven gear plate is arranged inside the shell, a rotating shaft is fixedly sleeved inside the driven gear plate, the top end of the rotating shaft is rotatably connected to the top of the inner wall of the shell, and the bottom end of the rotating shaft is fixedly connected to the middle of the top of the turntable.

[0006] A mounting mechanism is provided on the side of the horizontal laser instrument, and the mounting mechanism includes two L-shaped clamping plates. The lower parts of the two sides of the horizontal laser instrument are arranged on the inner walls of the two L-shaped clamping plates. Slide grooves are provided on both sides of the bottom of the turntable. Slide blocks are slidably connected inside the slide grooves. A connecting rod is fixedly connected to the bottom of the slider. The lower part of one side of the connecting rod is fixedly connected to one side of the L-shaped clamping plate.

[0007] Support rods are fixedly installed at the four corners of the bottom of the shell, and a reinforcement mechanism is provided at the bottom end of the support rod. The reinforcement mechanism includes an anti-slip base, and the top of the anti-slip base is fixedly installed on the bottom end of the support rod. A mounting plate is provided inside the anti-slip base, and a rubber suction cup is fixedly installed at the bottom of the mounting plate.

[0008] Furthermore, a protective cover is fixedly installed on the right side of the top of the shell, and a worm and a worm wheel are provided inside the protective cover. The worm and the worm wheel are meshed with each other, and the left end of the worm is rotatably connected to the left side of the inner wall of the protective cover, and the right end of the worm extends to the right side of the protective cover and is fixedly connected to a knob No. 1.

[0009] Furthermore, a protective cap is provided on the right side of the protective cover, the No. 1 knob is arranged inside the protective cap, an annular mounting groove is opened on the right side of the protective cover, and the left side of the protective cap is threadedly connected to the inside of the annular mounting groove.

[0010] Furthermore, a driving gear disc is provided on the right side inside the shell, and the driving gear disc is located on the right side of the driven gear disc, and the driving gear disc is meshed with the driven gear disc. A connecting shaft is fixedly sleeved inside the driving gear disc, and the bottom end of the connecting shaft is rotatably connected to the right side of the bottom of the inner wall of the shell, and the top end of the connecting shaft extends to the inside of the protective cover and is rotatably connected to the top of the inner wall of the protective cover, and the inner fixed sleeve of the worm gear is above the outer wall of the connecting shaft.

[0011] Furthermore, a plurality of limit blocks are fixedly connected to the upper part of the outer wall of the turntable, an annular limit groove is provided below the inner wall of the shell, and the outer wall of the limit block is slidably connected to the inside of the annular limit groove.

[0012] Furthermore, a screw is provided inside the slide groove, the internal thread of the slider is sleeved on the outer wall of the screw, one end of the screw is rotatably connected to one side of the inner wall of the slide groove, and the other end of the screw extends to the bottom of the side of the turntable and is fixedly connected to a No. 2 knob.

[0013] Furthermore, a rectangular positioning groove is opened in the middle of the bottom of the turntable, and a limiting iron block is fixedly connected to the middle of the top of the horizontal laser instrument. The outer wall of the limiting iron block is inserted into the inside of the rectangular positioning groove, and a magnetic sheet is fixedly embedded on the top of the inner wall of the rectangular positioning groove. The top of the limiting iron block is magnetically connected to the bottom of the magnetic sheet.

[0014] Furthermore, a bidirectional screw rod is provided inside the anti-slip base, one end of the bidirectional screw rod is rotatably connected to one side of the inner wall of the anti-slip base, the other end of the bidirectional screw rod extends to the outside of the anti-slip base and is fixedly connected to a No. 3 knob, and two driving blocks are threadedly sleeved on the outer wall of the bidirectional screw rod, and the two driving blocks are symmetrically arranged on the outer wall of the bidirectional screw rod, and two connecting frames are symmetrically hinged on the top of the mounting plate, and the top ends of the two connecting frames are hinged to the bottoms of the two driving blocks.

[0015] Furthermore, a guide rod is fixedly connected to the upper part of the interior of the anti-slip base, and the upper parts of the interiors of the two driving blocks are symmetrically slidably sleeved on the outer wall of the guide rod.

[0016] Furthermore, guide blocks are fixedly connected to both sides of the mounting plate, guide grooves are provided below both sides of the inner wall of the anti-slip base, and the outer wall of the guide block is slidably connected to the inside of the guide groove.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention adopts a turntable, a limit block, an annular limit groove, a protective cover, a protective cap, a No. 1 knob, a worm, a worm wheel, a connecting shaft, a driving gear plate, a driven gear plate and a rotating shaft, so as to facilitate driving the horizontal laser instrument to rotate horizontally and adjust the orientation of the horizontal laser instrument. The horizontal laser instrument generates a laser beam to irradiate the weld, thereby generating an auxiliary laser straight line at the weld, which is used to position the X-ray detection instrument when detecting the weld, and facilitates the auxiliary X-ray detection instrument to perform X-ray detection on the weld along the laser beam, thereby improving the detection efficiency and reducing the detection difficulty.

[0019] 2. The present invention adopts the cooperation of anti-skid base, No. 3 knob, bidirectional screw, driving block, guide rod, connecting frame, mounting plate, rubber sucker, guide block and guide groove to facilitate driving the rubber sucker to move downward, so that the rubber sucker is adsorbed on the bottom plate of the storage tank, thereby increasing the stability of the device when in use, and preventing personnel from accidentally touching the laser positioning device, causing the laser beam emitted by the horizontal laser instrument to deviate.

[0020] 3. The present invention adopts the cooperation of L-shaped clamping plate, sliding groove, No. 2 knob, screw, slider, connecting rod, rectangular positioning groove, limiting iron block and magnetic sheet. By rotating the No. 2 knob and the screw, it is convenient to drive the slider, connecting rod and L-shaped clamping plate to move, so that the two L-shaped clamping plates are separated from the bottom of the two sides of the horizontal laser instrument, and then the horizontal laser instrument is removed from the bottom of the turntable, and the horizontal laser instrument can be dismantled. By reversely driving the two L-shaped clamping plates to clamp the bottom of the two sides of the horizontal laser instrument, the horizontal laser instrument can be installed on the bottom of the turntable, thereby facilitating the disassembly and replacement of the horizontal laser instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0023] Figure 3 It is a top view schematic diagram of the limit block and the annular limit groove structure of the present invention.

[0024] Figure 4 It is a schematic cross-sectional view of the turntable structure of the present invention.

[0025] Figure 5 It is a schematic side view of the slide groove and slider structure of the present invention.

[0026] Figure 6 It is a schematic cross-sectional view of the anti-skid base structure of the present invention.

[0027] The accompanying drawings are marked as follows: 1, housing; 2, azimuth adjustment mechanism; 3, horizontal laser instrument; 4, mounting mechanism; 5, support rod; 6, reinforcement mechanism; 21, turntable; 211, limit block; 212, annular limit groove; 22, protective cover; 23, protective cap; 24, No. 1 knob; 25, worm; 26, worm wheel; 27, connecting shaft; 28, driving gear plate; 29, driven gear plate; 291, rotating shaft; 4 1. L-shaped clamp; 42. Slide; 43. Knob No. 2; 44. Screw; 45. Slider; 46. Connecting rod; 47. Rectangular positioning groove; 48. Limiting iron block; 49. Magnetic sheet; 61. Anti-slip base; 62. Knob No. 3; 63. Bidirectional screw; 64. Driving block; 65. Guide rod; 66. Connecting frame; 67. Mounting plate; 68. Rubber suction cup; 69. Guide block; 691. Guide groove. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The laser positioning device for tank radiation detection involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] like Figure 1-6As shown, a laser positioning device for ray detection of a storage tank comprises a shell 1, an azimuth adjustment mechanism 2 is arranged inside the shell 1, the azimuth adjustment mechanism 2 comprises a turntable 21, the outer wall of the turntable 21 is movably sleeved at the bottom of the shell 1, a horizontal laser instrument 3 is arranged at the bottom of the shell 1, the top of the horizontal laser instrument 3 is overlapped at the bottom of the turntable 21, a driven gear disc 29 is arranged inside the shell 1, a rotating shaft 291 is fixedly sleeved inside the driven gear disc 29, the top end of the rotating shaft 291 is rotatably connected to the top of the inner wall of the shell 1, the bottom end of the rotating shaft 291 is fixedly connected to the middle part of the top of the turntable 21, a protective cover 22 is fixedly installed on the right side of the top of the shell 1, a worm 25 and a worm wheel 26 are arranged inside the protective cover 22, the worm 25 and the worm wheel 26 are meshed, the left end of the worm 25 is rotatably connected to the left side of the inner wall of the protective cover 22, and the right end of the worm 25 extends to the right side of the protective cover 22 and is fixedly connected to a number 1 knob 24 A protective cap 23 is provided on the right side of the protective cover 22, and a No. 1 knob 24 is arranged inside the protective cap 23. An annular mounting groove is opened on the right side of the protective cover 22, and the left side of the protective cap 23 is threadedly connected to the inside of the annular mounting groove. A driving gear disc 28 is provided on the right side of the inside of the shell 1, and the driving gear disc 28 is located on the right side of the driven gear disc 29. The driving gear disc 28 is meshed with the driven gear disc 29, and a connecting shaft 27 is fixedly sleeved inside the driving gear disc 28. The bottom end of the connecting shaft 27 is rotatably connected to the right side of the bottom of the inner wall of the shell 1, and the top of the connecting shaft 27 extends to the inside of the protective cover 22 and is rotatably connected to the top of the inner wall of the protective cover 22. The inside of the worm gear 26 is fixedly sleeved above the outer wall of the connecting shaft 27. A plurality of limit blocks 211 are fixedly connected above the outer wall of the turntable 21, and an annular limit groove 212 is opened below the inner wall of the shell 1, and the outer wall of the limit block 211 is slidably connected to the inside of the annular limit groove 212.

[0031] In this embodiment, the protection cap 23 is provided to facilitate the protection of the No. 1 knob 24. The provision of the No. 1 knob 24 facilitates the staff to rotate the worm 25, and the worm 25 drives the worm wheel 26 to rotate. The worm 25 and the worm wheel 26 have a self-locking function. The worm 25 can drive the worm wheel 26 to rotate, while the worm wheel 26 is difficult to drive the worm 25 to rotate. The rotation of the worm wheel 26 facilitates the driving of the connecting shaft 27, the driving gear plate 28, the driven gear plate 29, the rotating shaft 291 and the turntable 21 to rotate, and the turntable 21 drives the plurality of limit blocks 211 to rotate in the ring. The internal sliding of the annular limit groove 212 and the setting of the limit block 211 in the annular limit groove 212 can facilitate the maintenance of the stability of the turntable 21 during rotation. The turntable 21 can also drive the horizontal laser 3 to rotate to adjust the orientation of the horizontal laser 3. The horizontal laser 3 can emit a vertical or horizontal long-distance laser beam, so that the laser beam emitted by the horizontal laser 3 is irradiated at the weld, thereby generating an auxiliary laser straight line at the weld, which can be used to position the X-ray detection instrument when detecting the weld, and to assist the X-ray detection instrument in performing X-ray detection on the weld along the laser beam.

[0032] Embodiment 2:

[0033] like Figure 1-6 As shown, a mounting mechanism 4 is provided on the side of the horizontal laser instrument 3, and the mounting mechanism 4 includes two L-shaped clamping plates 41. The lower parts of the two sides of the horizontal laser instrument 3 are arranged on the inner walls of the two L-shaped clamping plates 41. Slide grooves 42 are provided on both sides of the bottom of the turntable 21. Slide blocks 45 are slidably connected inside the slide grooves 42. The bottom of the slide block 45 is fixedly connected to a connecting rod 46. The lower part of one side of the connecting rod 46 is fixedly connected to one side of the L-shaped clamping plate 41. A screw rod 44 is provided inside the slide groove 42. The inner thread of the slide block 45 is sleeved on the outer wall of the screw rod 44. One end of the screw rod 44 is rotatably connected to one end of the inner wall of the slide groove 42. On the side, the other end of the screw 44 extends to the bottom of the side of the turntable 21 and is fixedly connected to the second knob 43. A rectangular positioning groove 47 is opened in the middle of the bottom of the turntable 21. A limiting iron block 48 is fixedly connected to the middle of the top of the horizontal laser 3. The outer wall of the limiting iron block 48 is inserted into the inside of the rectangular positioning groove 47. A magnetic piece 49 is fixedly embedded on the top of the inner wall of the rectangular positioning groove 47. The top of the limiting iron block 48 is magnetically connected to the bottom of the magnetic piece 49. A guide rod 65 is fixedly connected to the upper part of the anti-slip base 61. The upper part of the two driving blocks 64 is symmetrically slidably sleeved on the outer wall of the guide rod 65.

[0034] In this embodiment, by rotating the No. 2 knob 43 at the bottom of the two sides of the turntable 21, the No. 2 knob 43 drives the screw 44 to rotate, and the screw 44 drives the slider 45 to slide inside the slide groove 42. The bottom of the slider 45 drives the L-shaped clamping plate 41 to move through the connecting rod 46, so that the two L-shaped clamping plates 41 are separated from the bottom of the two sides of the horizontal laser instrument 3, and then the horizontal laser instrument 3 is moved downward. The horizontal laser instrument 3 drives the limiting iron block 48 to be taken out from the inside of the rectangular positioning groove 47, and the horizontal laser instrument 3 can be disassembled; when installing the horizontal laser instrument 3, the limiting iron block 48 at the top of the horizontal laser instrument 3 is inserted into the inside of the rectangular positioning groove 47, and the top of the limiting iron block 48 is magnetically adsorbed on the bottom of the magnetic sheet 49, so as to preliminarily limit the horizontal laser instrument 3, and then the No. 2 knob 43 at the bottom of the two sides of the turntable 21 is rotated in the opposite direction, and the two L-shaped clamping plates 41 are driven in the same way to clamp under the two sides of the horizontal laser instrument 3, so as to fix the horizontal laser instrument 3, so as to facilitate the installation of the horizontal laser instrument 3 at the bottom of the turntable 21.

[0035] Embodiment three:

[0036] like Figure 1-6As shown, support rods 5 are fixedly installed at the four corners of the bottom of the shell 1, and a reinforcement mechanism 6 is provided at the bottom end of the support rod 5. The reinforcement mechanism 6 includes an anti-skid base 61, and the top of the anti-skid base 61 is fixedly installed at the bottom end of the support rod 5. A mounting plate 67 is provided inside the anti-skid base 61, and a rubber suction cup 68 is fixedly installed at the bottom of the mounting plate 67. A bidirectional screw rod 63 is provided inside the anti-skid base 61, and one end of the bidirectional screw rod 63 is rotatably connected to one side of the inner wall of the anti-skid base 61, and the other end of the bidirectional screw rod 63 extends to the anti-skid base A number three knob 62 is fixedly connected to the outside of 61, and two driving blocks 64 are threadedly sleeved on the outer wall of the two-way screw rod 63. The two driving blocks 64 are symmetrically arranged on the outer wall of the two-way screw rod 63. Two connecting frames 66 are symmetrically hinged on the top of the mounting plate 67. The top ends of the two connecting frames 66 are hinged to the bottoms of the two driving blocks 64. Guide blocks 69 are fixedly connected to both sides of the mounting plate 67. Guide grooves 691 are opened at the bottom of both sides of the inner wall of the anti-slip base 61, and the outer walls of the guide blocks 69 are slidably connected to the inside of the guide grooves 691.

[0037] In this embodiment, before placing the device at the weld of the bottom plate of the storage tank, the location where the device is placed is first cleaned to keep the bottom plate of the storage tank clean, and then the device is placed. The staff rotates the bidirectional screw 63 through the No. 3 knob 62, drives the two drive blocks 64 to move relative to each other through the bidirectional screw 63, and uses the guide rod 65 to horizontally guide the two drive blocks 64. The two drive blocks 64 drive the mounting plate 67 to move through the connecting frame 66, and the two sides of the mounting plate 67 drive the guide blocks 69 to slide horizontally inside the guide groove 691. The cooperation between the guide blocks 69 and the guide groove 691 is used to facilitate the stability of the mounting plate 67 during movement. The mounting plate 67 also drives the rubber suction cup 68 to move downward, so that the rubber suction cup 68 is adsorbed on the bottom plate of the storage tank, thereby increasing the stability of the device during use.

[0038] In summary, if Figure 1-6As shown, this laser positioning device for ray detection of storage tanks, when in use, first move the device to the bottom plate weld of the storage tank that needs to be detected, and make the horizontal laser instrument 3 located above the weld, then turn the No. 3 knob 62, and the No. 3 knob 62 drives the two drive blocks 64 to slide horizontally on the outer wall of the guide rod 65 through the bidirectional screw rod 63, and the two drive blocks 64 also drive the top end of the connecting frame 66 to move, and the bottom end of the connecting frame 66 drives the mounting plate 67, the rubber suction cup 68 and the guide block 69 to move downward, so that the rubber suction cup 68 is adsorbed on the bottom plate of the storage tank, thereby fixing the device, if necessary, adjust the direction of the light beam emitted by the horizontal laser instrument 3 When the protective cap 23 is removed, the staff member rotates the worm 25 through the No. 1 knob 24. The worm 25 drives the worm wheel 26, the connecting shaft 27 and the driving gear disc 28 to rotate. The driving gear disc 28 also drives the driven gear disc 29 to rotate. The driven gear disc 29 drives the turntable 21, the limit block 211 and the horizontal laser instrument 3 to rotate through the rotating shaft 291, so as to adjust the orientation of the horizontal laser instrument 3 so that the laser beam emitted by the horizontal laser instrument 3 is irradiated on the weld, thereby generating an auxiliary laser straight line at the weld, positioning the X-ray detection instrument when detecting the weld, and assisting the X-ray detection instrument to perform X-ray detection on the weld along the laser beam.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0040] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0041] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser positioning device for ray detection of a storage tank, comprising a housing (1), characterized in that: The shell (1) is provided with an azimuth adjustment mechanism (2) inside, and the azimuth adjustment mechanism (2) includes a turntable (21), the outer wall of the turntable (21) is movably sleeved at the bottom of the shell (1), a horizontal laser instrument (3) is provided at the bottom of the shell (1), the top of the horizontal laser instrument (3) is overlapped at the bottom of the turntable (21), a driven gear disc (29) is provided inside the shell (1), a rotating shaft (291) is fixedly sleeved inside the driven gear disc (29), the top end of the rotating shaft (291) is rotatably connected to the top of the inner wall of the shell (1), and the bottom end of the rotating shaft (291) is fixedly connected to the middle of the top of the turntable (21), A mounting mechanism (4) is provided on the side of the horizontal laser instrument (3), and the mounting mechanism (4) includes two L-shaped clamping plates (41). The lower sides of the horizontal laser instrument (3) are arranged on the inner walls of the two L-shaped clamping plates (41). Slide grooves (42) are provided on both sides of the bottom of the turntable (21). A slider (45) is slidably connected inside the slide groove (42). A connecting rod (46) is fixedly connected to the bottom of the slider (45). The lower side of one side of the connecting rod (46) is fixedly connected to one side of the L-shaped clamping plate (41). Support rods (5) are fixedly mounted at the four corners of the bottom of the shell (1); a reinforcing mechanism (6) is provided at the bottom end of the support rod (5); the reinforcing mechanism (6) comprises an anti-skid base (61); the top of the anti-skid base (61) is fixedly mounted on the bottom end of the support rod (5); a mounting plate (67) is provided inside the anti-skid base (61); a rubber suction cup (68) is fixedly mounted at the bottom of the mounting plate (67).

2. A laser positioning device for tank radiation detection according to claim 1, characterized in that: A protective cover (22) is fixedly mounted on the right side of the top of the housing (1), a worm (25) and a worm wheel (26) are arranged inside the protective cover (22), the worm (25) and the worm wheel (26) are meshed, the left end of the worm (25) is rotatably connected to the left side of the inner wall of the protective cover (22), and the right end of the worm (25) extends to the right side of the protective cover (22) and is fixedly connected to a No. 1 knob (24).

3. A laser positioning device for tank radiation detection according to claim 2, characterized in that: A protective cap (23) is provided on the right side of the protective cover (22), the first knob (24) is arranged inside the protective cap (23), an annular mounting groove is provided on the right side of the protective cover (22), and the left side of the protective cap (23) is threadedly connected inside the annular mounting groove.

4. A laser positioning device for tank radiation detection according to claim 2, characterized in that: A driving gear disc (28) is provided on the right side inside the housing (1), and the driving gear disc (28) is located on the right side of the driven gear disc (29). The driving gear disc (28) and the driven gear disc (29) are meshed with each other. A connecting shaft (27) is fixedly sleeved inside the driving gear disc (28), and the bottom end of the connecting shaft (27) is rotatably connected to the right side of the bottom of the inner wall of the housing (1). The top end of the connecting shaft (27) extends to the inside of the protective cover (22) and is rotatably connected to the top of the inner wall of the protective cover (22). The inside of the worm wheel (26) is fixedly sleeved above the outer wall of the connecting shaft (27).

5. The laser positioning device for tank radiation detection according to claim 1 is characterized in that: A plurality of limit blocks (211) are fixedly connected to the upper portion of the outer wall of the turntable (21), an annular limit groove (212) is provided below the inner wall of the shell (1), and the outer wall of the limit block (211) is slidably connected to the inside of the annular limit groove (212).

6. The laser positioning device for tank radiation detection according to claim 1 is characterized in that: A screw rod (44) is provided inside the slide groove (42), and the internal thread of the slider (45) is sleeved on the outer wall of the screw rod (44). One end of the screw rod (44) is rotatably connected to one side of the inner wall of the slide groove (42), and the other end of the screw rod (44) extends to the lower side of the turntable (21) and is fixedly connected to a second knob (43).

7. The laser positioning device for tank radiation detection according to claim 1 is characterized in that: A rectangular positioning groove (47) is provided in the middle of the bottom of the turntable (21); a limiting iron block (48) is fixedly connected to the middle of the top of the horizontal laser instrument (3); the outer wall of the limiting iron block (48) is inserted into the interior of the rectangular positioning groove (47); a magnetic sheet (49) is fixedly embedded in the top of the inner wall of the rectangular positioning groove (47); and the top of the limiting iron block (48) is magnetically connected to the bottom of the magnetic sheet (49).

8. The laser positioning device for tank radiation detection according to claim 1 is characterized in that: A bidirectional screw rod (63) is provided inside the anti-slip base (61), one end of the bidirectional screw rod (63) is rotatably connected to one side of the inner wall of the anti-slip base (61), the other end of the bidirectional screw rod (63) extends to the outside of the anti-slip base (61) and is fixedly connected to a No. 3 knob (62), the outer wall of the bidirectional screw rod (63) is threadedly sleeved with two driving blocks (64), the two driving blocks (64) are symmetrically arranged on the outer wall of the bidirectional screw rod (63), the top of the mounting plate (67) is symmetrically hinged with two connecting frames (66), the top ends of the two connecting frames (66) are hinged to the bottoms of the two driving blocks (64).

9. A laser positioning device for storage tank radiation detection according to claim 8, characterized in that: A guide rod (65) is fixedly connected to the upper part of the interior of the anti-slip base (61), and the upper parts of the interiors of the two driving blocks (64) are symmetrically slidably sleeved on the outer wall of the guide rod (65).

10. The laser positioning device for tank radiation detection according to claim 1, characterized in that: Guide blocks (69) are fixedly connected to both sides of the mounting plate (67), guide grooves (691) are provided below both sides of the inner wall of the anti-slip base (61), and the outer wall of the guide block (69) is slidably connected to the inside of the guide groove (691).

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