Internal and external diameter measuring device for hydrogen conveying pipeline production

Abstract

The invention relates to an internal and external diameter measuring device for hydrogen conveying pipeline production, and belongs to the technical field of pipeline measurement, the internal and external diameter measuring device comprises a base, the upper surface of the base is provided with a U-shaped frame, one side of the U-shaped frame is provided with a motor, and the U-shaped frame is internally provided with a U-shaped groove. Two sets of threaded rods rotate at the same time under the meshing connection effect of a bevel gear C and a bevel gear D, so that an installation base moves downwards as a whole and cooperates with rotation of a winding rod to enable an inner diameter measuring mechanism to descend at the same time, and a balancing weight is always located in the middle position in a pipeline through a spring B and a supporting block B which are distributed in a cross shape; the gear rod A drives the outer diameter measuring mechanism to rotate synchronously, when stress of a pressure sensor in the outer diameter measuring mechanism is consistent, rotating distance measurement in the descending process is achieved through an ultrasonic distance measuring sensor A, and the inner diameter distance of the hydrogen conveying pipeline in the vertical direction is detected through an ultrasonic distance measuring sensor B; and multi-point detection of the inner and outer diameter pipelines of the hydrogen conveying pipeline is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline measurement, and particularly relates to a device for measuring the inner and outer diameters of a hydrogen transmission pipeline during production. Background Technique

[0002] A hydrogen transmission pipeline is a dedicated pipeline system for transporting hydrogen. Its design and manufacture need to consider the special properties of hydrogen, such as low density, high diffusivity, and flammability and explosiveness. It is necessary to detect the inner and outer diameters of the newly produced hydrogen transmission pipeline to ensure the dimensional uniformity and consistency of the pipeline, thereby ensuring its safety and reliability. Chinese Patent Grant Publication No. CN217275939U discloses a device for measuring the inner and outer diameters of a pipeline, including a rod body, a fixed scale, outer diameter scale lines, inner diameter scale lines, a spirit level, a dialing block, an inner diameter pointer, an outer diameter pointer, a movable scale, a dialing block sliding groove, a slider sliding groove, and a slider. The structure of the present invention is ingenious. The movable scale can slide on the rod body. After the fixed scale contacts the inner wall or outer wall of the pipeline, by sliding the movable scale, the movable scale can be made to contact the inner wall or outer wall of the pipeline. At this time, observing the scale number on the inner diameter scale line indicated by the outer diameter pointer or the scale number on the outer diameter scale line indicated by the inner diameter pointer can obtain the inner diameter or outer diameter of the pipeline. The device has a simple structure. Compared with the measurement method using a tape measure, its measurement points are easy to determine, and the inner and outer diameters of the pipeline can be easily measured as needed, which is conducive to popularization and use. The above-mentioned existing technical solutions have the following deficiencies: This device can measure the inner and outer diameters at the opening of the pipeline during use, but it is difficult to achieve multi-point detection for the middle part of a hydrogen transmission pipeline of a certain length. The data at the opening is only the values at both ends, rather than the overall inner and outer diameters of the pipeline. Ignoring the measurement of the middle part, too large or too small local dimensions may affect the mechanical strength of the pipeline and increase the risk of rupture. In order to improve the quality during pipeline production, it is necessary to design a device for measuring the inner and outer diameters of a hydrogen transmission pipeline during production to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for measuring the inner and outer diameters of a hydrogen transmission pipeline during production to solve the problem that it is difficult to achieve multi-point detection for the middle part of an existing hydrogen transmission pipeline of a certain length as mentioned in the above background technique.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for measuring the inner and outer diameters of hydrogen pipeline production, comprising a base, a U-shaped frame is arranged on the upper surface of the base, and a motor is arranged on one side of the U-shaped frame, a U-shaped groove is arranged inside the U-shaped frame, and a winding rod is rotatably connected to the inner wall of the U-shaped groove, the output shaft of the motor is rotatably connected to the winding rod, a connecting rope is wound around the outer surface of the winding rod, and an inner diameter measuring mechanism is arranged at the other end of the connecting rope, two groups of threaded rods are rotatably connected to the inside of the U-shaped groove, and the upper surfaces of the two groups of threaded rods are fixed. A bevel gear D is fixed on the outer surface of the winding rod, and two sets of bevel gears C are fixed, and the bevel gears C are meshed with the bevel gear D. The connecting rope is located between the two sets of threaded rods, and the outer sides of the two sets of threaded rods are threadedly connected with threaded sleeves, and a mounting seat is fixed between the two sets of threaded sleeves. A rotating groove is arranged inside the mounting seat, and an outer diameter measuring mechanism is arranged inside the rotating groove. Gear rods A and gear rods B are rotatably connected on both sides of the upper surface of the base, respectively. A deflector is arranged on the upper surface of the base, and the interior of the deflector and the interior of the mounting seat are provided with Two groups of through holes are arranged, the gear rod A and the gear rod B both pass through the inside of the through holes, the gear rod A extends into the inside of the U-shaped groove, the outer surfaces of the threaded rod and the gear rod A are connected with belts in a transmission manner, the upper surface of the base is provided with a collecting groove, and the inside of the collecting groove is slidably connected with a collecting frame, a placing frame is fixed at the opening of the collecting groove, and a positioning seat is arranged on the upper surface of the placing frame, a cleaning mechanism is arranged on the upper surface of the deflector, and a positioning mechanism is arranged inside the collecting groove; the outer diameter measuring mechanism includes a rotating groove arranged on the inner side of the mounting seat, and the rotating groove is provided with a positioning seat. An annular seat is rotatably connected inside the movable groove, and teeth are arranged on the outer side of the annular seat, and the teeth on the outer side of the annular seat are respectively meshed and connected with the outer sides of the gear rod A and the gear rod B, and two groups of ultrasonic ranging sensors A are arranged on the inner wall of the annular seat, and two groups of mounting columns are arranged on the inner wall of the annular seat, and two groups of accommodating grooves A are arranged inside the two groups of mounting columns, and pressure sensors are fixed on one side of the inner wall of the two groups of accommodating grooves A, and springs A are arranged on one side of the two groups of pressure sensors, and support rods A are arranged on the side of the two groups of springs A away from the pressure sensors.

[0005] Preferably, the two groups of support rods A are slidably connected to the inner walls of the two groups of accommodating grooves A, and the bottom ends of the support rods A on the side away from the springs A are arranged in an inclined shape.

[0006] Preferably, the inner diameter measuring mechanism includes a counterweight block arranged at the bottom end of the connecting rope, two groups of ultrasonic ranging sensors B are arranged on the lower surface of the counterweight block, a connecting plate is fixed to the lower surface of the counterweight block, a receiving groove B is arranged inside the connecting plate, a spring B is arranged on one side of the inner wall of the receiving groove, and a support block B is fixed to the other side of the spring B.

[0007] Preferably, one side of the bottom end of the support block B away from the spring B is arranged in an inclined shape, and the support blocks B are symmetrically distributed in a cross shape on the lower surface of the connecting plate.

[0008] Preferably, the positioning mechanism includes a support seat arranged inside the collection groove, and a piston rod is fixed on the upper surface of the support seat. An accommodation groove is arranged inside the positioning seat, and an airbag B is arranged inside the accommodation groove. An air delivery channel is arranged inside the positioning seat, and the air delivery channel is communicated with the inside of the airbag B. The piston rod is slidably connected to the air delivery channel. Both the gear rod A and the gear rod B extend into the collection groove. Conical gears A are fixed on the lower surfaces of both the gear rod A and the gear rod B. A gear block is rotatably connected inside the collection groove, and conical gears B are fixed on one side of the gear block close to the conical gears A. The conical gear B is meshed with the conical gear A. Rack bars are fixed on both sides of the support seat, and the rack bars are meshed with the gear block. A limiting component is arranged inside the rack bar.

[0009] Preferably, the cross-section of the support seat is arranged in a Z shape, and the cross-sectional size of the piston rod is adapted to the cross-sectional size of the air delivery channel.

[0010] Preferably, the limiting component includes a rectangular groove arranged inside the rack bar. A fixing rod is slidably connected inside the rectangular groove. The upper surface of the fixing rod is fixed to the top of the collection groove, and a spring C is fixed to the top of the collection groove. The rectangular groove penetrates through the inside of the spring C. The lower surface of the spring C is fixed to the upper surface of the rack bar. Limit rods are fixed at both ends of the rack bar, and springs D and sliders are respectively sleeved on the outer sides of both ends of the limit rods. Moving teeth are fixed on one side of the two groups of sliders.

[0011] Preferably, the cross-section of the fixing rod is arranged in a T shape, and the cross-sectional size of the fixing rod is adapted to the size of the rectangular groove. The limit rods, the springs D and the sliders are all symmetrically arranged with respect to the rack bar.

[0012] Preferably, the cleaning mechanism includes an annular pipe arranged on the upper surface of the flow guide cover, and air nozzles are arranged on the lower surface of the annular pipe. An airbag A is arranged on the upper surface of the base, and the airbags A are arranged in pairs symmetrically. A three-way connecting pipe is arranged between two adjacent airbags A, and the other end of the three-way connecting pipe is connected to the inner wall of the annular pipe. Two lower pressing plates are arranged on the lower surface of the mounting seat.

[0013] Preferably, the lower pressing plates are directly above the airbags A, and the vertical height of the lower pressing plates is smaller than the vertical height of the flow guide cover. Compared with the prior art, the beneficial effects of the present invention are: By starting the motor, the winding rod is driven to rotate. Under the meshing connection of bevel gear C and bevel gear D, the two sets of threaded rods rotate simultaneously, so that the whole mounting seat moves downward. In cooperation with the rotation of the winding rod, the inner diameter measuring mechanism descends simultaneously. Through the cross-shaped distributed spring B and support block B, the counterweight is always in the middle position inside the pipeline. The outer diameter measuring mechanism is driven to rotate synchronously by the gear rod A. When the pressure sensors inside the outer diameter measuring mechanism receive the same force, the ultrasonic distance measuring sensor A realizes the rotational distance measurement during the descending process. The ultrasonic distance measuring sensor B detects the inner diameter distance in the vertical direction of the hydrogen transmission pipeline, realizing the multi-point detection of the inner and outer diameters of the hydrogen transmission pipeline, avoiding the possible influence on the mechanical strength of the pipeline due to the local oversize or undersize of the middle position of the hydrogen transmission pipeline, effectively ensuring the safety and reliability of pipeline production. Through the positioning mechanism, the airbag B is inflated, and the hydrogen transmission pipeline is centered under the elastic action of the airbag B. In cooperation with the limit component, the height of the rack is maintained, and at the same time, the hydrogen transmission pipeline is centered, improving the practicability of the whole inner and outer diameter measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 is the front sectional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the distribution of the outer diameter measuring mechanism of the present invention; Figure 3 is the three-dimensional structure schematic diagram of the inner diameter measuring mechanism of the present invention; Figure 4 is the top three-dimensional structure schematic diagram of the base of the present invention; Figure 5 is the three-dimensional structure schematic diagram of the distribution of the positioning mechanism of the present invention; Figure 6 is the three-dimensional structure schematic diagram of the limit component of the present invention; Figure 7 is the three-dimensional structure schematic diagram of the present invention.

[0016] Description of the reference numerals in the figures: 1. U-shaped frame; 2. Rewinding rod; 3. Motor; 4. Outer diameter measuring mechanism; 401. Ring seat; 402. Ultrasonic distance measuring sensor A; 403. Support rod A; 404. Mounting post; 405. Spring A; 406. Pressure sensor; 5. Connecting rope; 6. Mounting seat; 7. Cleaning mechanism; 701. Airbag A; 702. Three-way connecting pipe; 703. Ring pipe; 704. Air nozzle; 705. Lower pressing plate; 8. Deflector; 9. Base; 10. Positioning mechanism; 1001. Airbag B; 1002. Air supply channel; 1003. Piston rod; 1004. Support seat; 1005. Gear block; 1006. Rack; 1007. Bevel gear A; 1008. Bevel gear B; 11. Collection box; 12. Inner diameter measuring mechanism; 1201. Spring B; 1202. Counterweight; 1203. Ultrasonic distance measuring sensor B; 1204. Connecting plate; 1205. Support block B; 13. Bevel gear C; 14. Bevel gear D; 15. Threaded rod; 16. Threaded sleeve; 17. Gear rod A; 18. Gear rod B; 19. Placing frame; 20. Positioning seat; 21. Limiting assembly; 2101. Rectangular groove; 2102. Spring C; 2103. Fixed rod; 2104. Limiting rod; 2105. Spring D; 2106. Slide block; 2107. Moving tooth; 22. Belt. Detailed implementation manners

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0018] In order to solve the problem that it is difficult to achieve multi-point detection at the middle part of an existing hydrogen transmission pipeline of a certain length in the prior art, the following solutions are disclosed, specifically as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown in: A device for measuring inner and outer diameters of hydrogen pipeline production includes a base 9, a U-shaped frame 1 is arranged on the upper surface of the base 9, and a motor 3 is arranged on one side of the U-shaped frame 1, a U-shaped groove is arranged inside the U-shaped frame 1, and a winding rod 2 is rotatably connected to the inner wall of the U-shaped groove, the output shaft of the motor 3 is rotatably connected to the winding rod 2, a connecting rope 5 is wound around the outer surface of the winding rod 2, and an inner diameter measuring mechanism 12 is arranged at the other end of the connecting rope 5, two groups of threaded rods 15 are rotatably connected inside the U-shaped groove, and bevel gears D14 are fixed on the upper surfaces of the two groups of threaded rods 15, and two groups of bevel gears C14 are fixed on the outer surface of the winding rod 2 13, and the bevel gear C13 is meshed with the bevel gear D14, the connecting rope 5 is located between the two groups of threaded rods 15, the outer sides of the two groups of threaded rods 15 are threadedly connected with threaded sleeves 16, and a mounting seat 6 is fixed between the two groups of threaded sleeves 16, the interior of the mounting seat 6 is provided with a rotating groove, and the interior of the rotating groove is provided with an outer diameter measuring mechanism 4, the two sides of the upper surface of the base 9 are rotatably connected with a gear rod A17 and a gear rod B18 respectively, the upper surface of the base 9 is provided with a deflector 8, and the interior of the deflector 8 and the interior of the mounting seat 6 are provided with two groups of through holes, and the gear rod A17 and the gear rod B18 are The gear rod A17 extends into the U-shaped groove through the through hole, the outer surface of the threaded rod 15 and the gear rod A17 is connected with a belt 22, the upper surface of the base 9 is provided with a collecting groove, and the collecting groove is slidably connected with a collecting frame 11, the opening of the collecting groove is fixed with a placing frame 19, and the upper surface of the placing frame 19 is provided with a positioning seat 20, the upper surface of the air guide cover 8 is provided with a cleaning mechanism 7, and the interior of the collecting groove is provided with a positioning mechanism 10; the outer diameter measuring mechanism 4 includes a rotating groove provided on the inner side of the mounting seat 6, and the interior of the rotating groove is rotatably connected with an annular seat 401, and the annular seat 40 1 is provided with teeth on the outer side of the annular seat 401, and the teeth on the outer side of the annular seat 401 are meshed and connected with the outer sides of the gear rod A17 and the gear rod B18 respectively. Two groups of ultrasonic ranging sensors A402 are provided on the inner wall of the annular seat 401, and two groups of mounting columns 404 are provided on the inner wall of the annular seat 401, and two groups of accommodating grooves A are provided inside the two groups of mounting columns 404, and pressure sensors 406 are fixed on one side of the inner wall of the two groups of accommodating grooves A, and springs A405 are provided on one side of the two groups of pressure sensors 406, and support rods A403 are provided on the side of the two groups of springs A405 away from the pressure sensors 406.

[0019] Two groups of support rods A403 are slidably connected to the inner walls of two groups of receiving grooves A. The bottom end of the support rod A403 on the side away from the spring A405 is arranged in an inclined shape. The inner diameter measuring mechanism 12 includes a counterweight block 1202 arranged at the bottom end of the connecting rope 5. Two ultrasonic distance measuring sensors B1203 are arranged on the lower surface of the counterweight block 1202. A connecting plate 1204 is fixed on the lower surface of the counterweight block 1202. A receiving groove B is arranged inside the connecting plate 1204. A spring B1201 is arranged on one side of the inner wall of the receiving groove. The other side of the spring B1201 is fixed with a support block B1205. The bottom end of the support block B1205 on the side away from the spring B1201 is arranged in an inclined shape. The support blocks B1205 are symmetrically distributed in a cross shape on the lower surface of the connecting plate 1204. The positioning mechanism 10 includes a support seat 1004 arranged inside the collection groove. A piston rod 1003 is fixed on the upper surface of the support seat 1004. A receiving groove is arranged inside the positioning seat 20. An airbag B1001 is arranged inside the receiving groove. An air delivery channel 1002 is arranged inside the positioning seat 20. The air delivery channel 1002 is communicated with the inside of the airbag B1001. The piston rod 1003 is slidably connected to the air delivery channel 1002. The gear rod A17 and the gear rod B18 both extend into the collection groove. Conical gears A1007 are fixed on the lower surfaces of the gear rod A17 and the gear rod B18. A gear block 1005 is rotatably connected inside the collection groove. Conical gears B1008 are fixed on the side of the gear block 1005 close to the conical gear A1007. The conical gear B1008 is meshed with the conical gear A1007. Rack bars 1006 are fixed on both sides of the support seat 1004. The rack bars 1006 are meshed with the gear block 1005. A limiting component 21 is arranged inside the rack bar 1006. The cross section of the support seat 1004 is arranged in a Z shape. The cross-sectional size of the piston rod 1003 is adapted to the cross-sectional size of the air delivery channel 1002. The limiting component 21 includes a rectangular groove 2101 arranged inside the rack bar 1006. A fixing rod 2103 is slidably connected inside the rectangular groove 2101. The upper surface of the fixing rod 2103 is fixed to the top of the collection groove. A spring C2102 is fixed to the top of the collection groove. The rectangular groove 2101 penetrates through the inside of the spring C2102. The lower surface of the spring C2102 is fixed to the upper surface of the rack bar 1006. Limiting rods 2104 are fixed at both ends of the rack bar 1006. Springs D2105 and sliders 2106 are respectively sleeved on the outer sides of the two ends of the limiting rod 2104. A moving tooth 2107 is fixed on one side of the two sliders 2106. The cross section of the fixing rod 2103 is arranged in a T shape. The cross-sectional size of the fixing rod 2103 is adapted to the size of the rectangular groove 2101. The limiting rods 2104, the springs D2105 and the sliders 2106 are all symmetrically arranged with respect to the rack bar 1006.

[0020] In this embodiment, when the inner and outer diameter measuring device needs to be used, the hydrogen transmission pipeline is sleeved on the positioning seat 20 and placed above the placement frame 19. The motor 3 is started to drive the winding rod 2 to rotate. Under the meshing connection of the bevel gear C13 and the bevel gear D14, the threaded rod 15 rotates simultaneously, causing the entire mounting seat 6 to move downward. At the same time, as the winding rod 2 rotates, the connecting rope 5 is released, causing the inner diameter measuring mechanism 12 to descend simultaneously. Under the action of the belt 22, the gear rod A17 rotates synchronously. Under the meshing action of the gear rod A17 and the outer teeth of the annular seat 401, the entire outer diameter measuring mechanism 4 rotates, and at the same time drives the gear rod B18 to rotate, causing the outer diameter measuring mechanism 4 to rotate and descend. Under the meshing connection of the bevel gear A1007 and the bevel gear B1008 connected to the bottom ends of the gear rod A17 and the gear rod B18, the gear block 1005 is driven to rotate. Cooperating with the outer teeth of the rack 1006, the rack 1006 moves upward along the fixed rod 2103, causing the piston rod 1003 to slide in the air supply channel 1002 to inflate the airbag B1001. Under the elastic action of the airbag B1001, the hydrogen transmission pipeline is centered. When the rack 1006 slides to a certain height, the gear block 1005 meshes with the moving tooth 2107, driving the moving tooth 2107 upward. Under the limiting action of the slider 2106 and the spring action of the spring D2105, the moving tooth 2107 is buffered when it is acted on upward by the gear block 1005, maintaining the height of the rack 1006, and at the same time maintaining the centering of the hydrogen transmission pipeline without affecting the downward movement of the mounting seat 6. During the downward movement of the mounting seat 6 and the inner diameter measuring mechanism 12, the weight block 1202 is always in the middle position inside the hydrogen transmission pipeline through the cross-shaped distributed spring B1201 and the support block B1205. The outer wall of the hydrogen transmission pipeline is contacted by the support rod A403 to squeeze the spring A405, and the acting force is transmitted to the pressure sensor 406. When the two pressure sensors 406 are subjected to the same force, the ultrasonic ranging sensor A402 and the ultrasonic ranging sensor B1203 are simultaneously turned on. The rotational ranging during the downward movement is realized through the ultrasonic ranging sensor A402, and the inner diameter distance in the vertical direction of the hydrogen transmission pipeline is detected through the ultrasonic ranging sensor B1203. Since the ultrasonic ranging sensor A402 and the ultrasonic ranging sensor B1203 are both symmetrically arranged, and the distance between the two groups of ultrasonic ranging sensors A402 and the two groups of ultrasonic ranging sensors B1203 is fixed, multi-point detection of the inner and outer diameters of the hydrogen transmission pipeline is realized, avoiding the possible influence on the mechanical strength of the pipeline due to too large or too small local dimensions in the middle position of the hydrogen transmission pipeline, effectively ensuring the safety and reliability of pipeline production. Embodiment

[0021] In order to centrally collect the dust scraped off during the measurement process, the following solution is disclosed. Specifically, as Figure 1 、 Figure 2 、Figure 4 Figure 5 and Figure 7 as shown in The cleaning mechanism 7 includes an annular pipe 703 arranged on the upper surface of the flow guide cover 8, and air nozzles 704 are arranged on the lower surface of the annular pipe 703. An airbag A701 is arranged on the upper surface of the base 9, and the airbags A701 are symmetrically arranged in pairs. A three-way connecting pipe 702 is arranged between two adjacent groups of airbags A701, and the other end of the three-way connecting pipe 702 is communicated with the inner wall of the annular pipe 703. Two lower pressing plates 705 are arranged on the lower surface of the mounting seat 6, and the lower pressing plates 705 are directly above the airbags A701. The vertical height of the lower pressing plates 705 is smaller than the vertical height of the flow guide cover 8.

[0022] In this embodiment, when the mounting seat 6 and the inner diameter measuring mechanism 12 descend as a whole, a certain amount of air flow is generated, and a part of the dust inside and outside the hydrogen transmission pipeline is pushed to one side of the flow guide cover 8. When the mounting seat 6 and the inner diameter measuring mechanism 12 detect below the outside of the hydrogen transmission pipeline, the lower pressing plates 705 on the lower surface of the mounting seat 6 press the airbags A701, and the gas is transported to the inside of the annular pipe 703 through the three-way connecting pipe 702, and then discharged through the air nozzles 704 at the bottom of the annular pipe 703, so that the dust collected outside the flow guide cover 8 is pushed into the inside of the collection groove, and is centrally collected through the collection frame 11, which reduces the labor intensity of the staff to a certain extent and improves the overall work efficiency.

[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the inner and outer diameters of a hydrogen transmission pipeline during production, comprising a base (9), characterized in that: A U-shaped frame (1) is provided on the upper surface of the base (9), and a motor (3) is provided on one side of the U-shaped frame (1); a U-shaped groove is provided inside the U-shaped frame (1), and a winding rod (2) is rotatably connected to the inner wall of the U-shaped groove; an output shaft of the motor (3) is rotatably connected to the winding rod (2); a connecting rope (5) is wound around the outer surface of the winding rod (2), and an inner diameter measuring mechanism (12) is provided at the other end of the connecting rope (5); two sets of connecting rods (12) are rotatably connected to the inner wall of the U-shaped groove; The threaded rods (15) are provided with bevel gears D (14) fixed on the upper surfaces of the two sets of threaded rods (15); the outer surfaces of the winding rods (2) are provided with two sets of bevel gears C (13) fixed thereto, and the bevel gears C (13) are meshingly connected with the bevel gears D (14); the connecting rope (5) is located between the two sets of threaded rods (15); the outer sides of the two sets of threaded rods (15) are threadedly connected with threaded sleeves (16); a mounting seat (6) is fixed between the two sets of threaded sleeves (16); the mounting seat ( 6) is provided with a rotating groove inside, and an outer diameter measuring mechanism (4) is provided inside the rotating groove, a gear rod A (17) and a gear rod B (18) are rotatably connected to the two sides of the upper surface of the base (9), a deflector (8) is provided on the upper surface of the base (9), and two groups of through holes are provided inside the deflector (8) and inside the mounting seat (6), the gear rod A (17) and the gear rod B (18) both penetrate the inside of the through holes, the gear rod A (17) extends into the inside of the U-shaped groove, the outer surfaces of the threaded rod (15) and the gear rod A (17) are transmission-connected with a belt (22), a collecting groove is provided on the upper surface of the base (9), and a collecting frame (11) is slidably connected inside the collecting groove, a placement frame (19) is fixed at the opening of the collecting groove, and a positioning seat (20) is provided on the upper surface of the placement frame (19), a cleaning mechanism (7) is provided on the upper surface of the deflector (8), and a positioning mechanism (10) is provided inside the collecting groove; The outer diameter measuring mechanism (4) comprises a rotating groove arranged on the inner side of a mounting seat (6), the inner side of the rotating groove is rotatably connected to an annular seat (401), and teeth are arranged on the outer side of the annular seat (401), and the teeth on the outer side of the annular seat (401) are respectively meshed with the outer sides of a gear rod A (17) and a gear rod B (18), two groups of ultrasonic distance measuring sensors A (402) are arranged on the inner wall of the annular seat (401), two groups of mounting columns (404) are arranged on the inner wall of the annular seat (401), and two groups of accommodating grooves A are arranged inside the two groups of mounting columns (404), pressure sensors (406) are fixed on one side of the inner wall of the two groups of accommodating grooves A, and springs A (405) are arranged on one side of the two groups of pressure sensors (406), and support rods A (403) are arranged on the side of the two groups of springs A (405) away from the pressure sensors (406).

2. The inner and outer diameter measuring device for the production of hydrogen transmission pipelines according to claim 1, wherein: The two groups of the support rods A (403) are slidably connected to the inner walls of the two groups of receiving grooves A, and the bottom ends of the support rods A (403) on the side away from the springs A (405) are arranged in an inclined shape.

3. The internal and external diameter measuring device for the production of hydrogen transmission pipelines according to claim 1, wherein: The inner diameter measuring mechanism (12) includes a counterweight (1202) arranged at the bottom end of the connecting rope (5). Two groups of ultrasonic ranging sensors B (1203) are arranged on the lower surface of the counterweight (1202). A connecting plate (1204) is fixed to the lower surface of the counterweight (1202). A receiving groove B is arranged inside the connecting plate (1204). A spring B (1201) is arranged on one side of the inner wall of the receiving groove, and a support block B (1205) is fixed to the other side of the spring B (1201).

4. The internal and external diameter measuring device for the production of hydrogen transmission pipelines according to claim 3, characterized in that: The bottom end of the support block B (1205) on the side away from the spring B (1201) is arranged in an inclined shape, and the support blocks B (1205) are symmetrically distributed in a cross shape on the lower surface of the connecting plate (1204).

5. A device for measuring the inner and outer diameters of a hydrogen transmission pipeline according to claim 1, characterized in that: The positioning mechanism (10) includes a support seat (1004) arranged inside the collection groove. A piston rod (1003) is fixed to the upper surface of the support seat (1004). A receiving groove is arranged inside the positioning seat (20), and an airbag B (1001) is arranged inside the receiving groove. An air delivery channel (1002) is arranged inside the positioning seat (20), and the air delivery channel (1002) is communicated with the inside of the airbag B (1001). The piston rod (1003) is slidably connected to the air delivery channel (1002). The gear rod A (17) and the gear rod B (18) both extend into the collection groove. The lower surfaces of the gear rod A (17) and the gear rod B (18) are both fixed with bevel gears A (1007). A gear block (1005) is rotatably connected inside the collection groove, and bevel gears B (1008) are fixed to the sides of the gear block (1005) close to the bevel gears A (1007). The bevel gears B (1008) are meshed with the bevel gears A (1007). Rack bars (1006) are fixed to both sides of the support seat (1004), and the rack bars (1006) are meshed with the gear block (1005). A limiting component (21) is arranged inside the rack bars (1006).

6. The internal and external diameter measuring device for the production of hydrogen transmission pipelines according to claim 5, characterized in that: The cross section of the support seat (1004) is arranged in a Z shape, and the cross-sectional size of the piston rod (1003) is adapted to the cross-sectional size of the air delivery channel (1002).

7. A measuring device for the inner and outer diameters of a hydrogen transmission pipeline according to claim 5, characterized in that: The limiting component (21) includes a rectangular groove (2101) provided inside the rack (1006). A fixing rod (2103) is slidably connected inside the rectangular groove (2101). The upper surface of the fixing rod (2103) is fixedly connected to the top of the collection groove, and a spring C (2102) is fixed to the top of the collection groove. The rectangular groove (2101) penetrates through the inside of the spring C (2102). The lower surface of the spring C (2102) is fixedly connected to the upper surface of the rack (1006). Limiting rods (2104) are fixed at both ends of the rack (1006), and springs D (2105) and sliders (2106) are sleeved on the outer sides of the two ends of the limiting rods (2104) respectively. Moving teeth (2107) are fixed to one sides of the two groups of sliders (2106).

8. A device for measuring the inner and outer diameters of a hydrogen transmission pipeline according to claim 7, characterized in that: The cross-section of the fixing rod (2103) is T-shaped. The size of the cross-section of the fixing rod (2103) is adapted to the size of the rectangular groove (2101). The limiting rods (2104), the springs D (2105) and the sliders (2106) are all symmetrically arranged with respect to the rack (1006).

9. A measuring device for the inner and outer diameters of a hydrogen transmission pipeline according to claim 1, characterized in that: The cleaning mechanism (7) includes an annular pipe (703) provided on the upper surface of the flow guide cover (8). Nozzles (704) are provided on the lower surface of the annular pipe (703). An airbag A (701) is provided on the upper surface of the base (9), and the airbag A (701) is arranged in pairs symmetrically. A three-way connecting pipe (702) is provided between two adjacent groups of the airbags A (701), and the other end of the three-way connecting pipe (702) is communicated with the inner wall of the annular pipe (703). Two lower pressing plates (705) are provided on the lower surface of the mounting seat (6).

10. A device for measuring the inner and outer diameters of a hydrogen transmission pipeline according to claim 9, characterized in that: The lower pressing plate (705) is directly above the airbag A (701). The vertical height of the lower pressing plate (705) is smaller than the vertical height of the flow guide cover (8).

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