A safety protection device for detecting air tightness of hydrogen storage tank

Abstract

The present invention discloses a safety protection device for detecting the air tightness of a hydrogen storage tank, comprising a base and a hydrogen storage tank, one end of the hydrogen storage tank being fixedly connected and connected to an air inlet; when the present invention is inflating, a pressure sensor contacts the surface of the hydrogen storage tank, and after the hydrogen storage tank is continuously inflated and pressurized, an expansion phenomenon occurs, which generates pressure on the pressure sensor; if the pressure is greater than a standard value, the inflation is immediately stopped, and it can be determined that the hydrogen storage tank has a large defect, and then the vacuum tank in the pressure relief component in the inflation mechanism is cooperated to quickly discharge excess gas, so as to avoid the phenomenon of explosion of the large hydrogen storage tank when inflated and pressurized, thereby making the detection process safer; when it is necessary to confirm the leakage point of an unqualified hydrogen storage tank, heated air is filled in through the heating component in the inflation mechanism, and the hydrogen storage tank is thermally imaged by a thermal imaging camera that can move in multiple directions, and hot air will leak out from the leaking place, so the position of the leakage point can be determined, which is convenient for repairing unqualified products.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage tank detection equipment, and in particular to a safety protection device for hydrogen storage tank air tightness detection. Background Art

[0002] A hydrogen storage tank is a type of gas tank, which is a general term for constant-pressure variable-volume and variable-pressure constant-volume containers used to store hydrogen. A hydrogen storage tank is a type of pressure vessel. In order to ensure its sealing performance, the hydrogen storage tank needs to be tested for air tightness during production, and after it is put into use, it also needs to be tested for air tightness. The current testing method mainly adopts the inflation method, that is, air is filled into the hydrogen storage tank to make the pressure reach the pressure state when the hydrogen storage tank is working, and then the air tightness is determined by observing the pressure change in the tank; for example, the Chinese invention patent with the authorization announcement number CN216791563U The invention discloses a pressure vessel rapid gas leakage detection device, which can improve the comprehensiveness of pressure vessel detection, improve the convenience of detection, and improve the detection efficiency; it includes a base, two sets of vertical plates, two sets of screw rods, a lifting frame, two sets of cylinders, a connecting pipe, a threaded sleeve, an ejector rod, an ejector plate, a spring, a barometer and a pressure-sensitive sensor, the bottom end of the vertical plate is fixedly connected to the top end of the base, the screw rod thread passes through the vertical plate, one end of the screw rod is provided with a connecting plate, the other end of the screw rod is rotatably connected to the lifting frame, and the bottom end of the cylinder is fixedly connected to the top end of the lifting frame; however, the current hydrogen storage tank air tightness detection device has the following defects:

[0003] At present, hydrogen storage tanks that need to be tested for air tightness, in addition to those that need to be tested during production, also need to be tested for air tightness for hydrogen storage tanks that have been in use for a long time. Such hydrogen storage tanks that have been in use for a long time may have major defects. If such hydrogen storage tanks are seriously unqualified during inflation, there is a risk of the tank body bursting when the pressure increases, which has a high safety risk and is not conducive to being put into use. In addition, the current hydrogen storage tank air tightness detection device can determine whether the hydrogen storage tank is leaking by inflation, but it is difficult to determine the location of the leak, and the detection is not complete, which is not conducive to the repair of defective products.

[0004] To this end, we propose a safety protection device for hydrogen storage tank air tightness detection to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a safety protection device for detecting the air tightness of a hydrogen storage tank to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safety protection device for detecting the air tightness of a hydrogen storage tank, comprising a base and a hydrogen storage tank, one end of the hydrogen storage tank is fixedly connected to and connected to an air inlet, the other end of the hydrogen storage tank is fixedly connected to and connected to an exhaust port, two legs are fixedly connected to both sides of the bottom surface of the hydrogen storage tank, a controller and an analyzer are fixedly connected to the top surface of the base, a display screen is fixedly connected to the analyzer, a tank body fixing component is arranged on the top surface of one side of the base, the hydrogen storage tank is arranged on the tank body fixing component, two support plates are vertically fixedly connected to the top surface of the base at both sides of the hydrogen storage tank, a thermal imaging detection mechanism is arranged on the top surfaces of the two support plates, an expansion detection component is arranged on the top surface of the base near the middle of the hydrogen storage tank, and an inflation mechanism is also arranged on the top surface of the base;

[0007] The inflation mechanism includes a transverse tube, a heating component, a pressure relief component, an air pump and a triplet, wherein the triplet and the air pump are fixedly connected to the top surface of the base, the transverse tube is horizontally fixedly sleeved on one of the support plates, the air pump is connected to the triplet, the triplet is connected to the heating component, the heating component is connected to the transverse tube, the middle part of the transverse tube is horizontally fixed and connected to the air relief main pipe, and the air relief main pipe is connected to the pressure relief component;

[0008] The expansion detection assembly comprises a bottom strip, the bottom strip is fixedly embedded in the top surface of the base, a top slide groove is provided on the top surface of the bottom strip, a top slider is horizontally slidably connected in the top slide groove, the top surface of the top slider is fixedly connected to a stand, the top end of the stand is fixedly connected to an arc frame, a plurality of electric push rods are fixedly sleeved on the arc frame, and the output end of the electric push rod is fixedly connected to a pressure sensor;

[0009] The thermal imaging detection mechanism includes two columns, the two columns are vertically fixed to the top ends of two support plates, a cross bar is vertically slidably arranged between the two columns, an arc-shaped rod is horizontally slidably arranged on the bottom surface of the cross bar, and a thermal imaging camera is slidably arranged on the bottom surface of the arc-shaped rod.

[0010] Preferably, the pressure relief assembly includes a vacuum tank and a main pressure relief pipe, the vacuum tank is fixedly connected to the top surface of the base, the top surface of the vacuum tank is fixedly connected to and connected to the vacuum pump, the main pressure relief pipe is fixedly connected to and connected to the air relief main pipe, one side of the end of the main pressure relief pipe is fixedly connected to and connected to the sub-pressure relief pipe, the other side of the end of the main pressure relief pipe is fixedly connected to and connected to the natural pressure relief pipe, the sub-pressure relief pipe is fixedly connected to and connected to the vacuum tank, and the sub-pressure relief pipe is fixedly connected to and connected to the third solenoid valve.

[0011] Preferably, the heating assembly includes a heating tube, a plurality of heating covers are fixedly sleeved on the circumference of the heating tube, the plurality of heating covers are fixedly connected to the top surface of the base, an electric heating tube is fixedly connected inside the heating cover, a heater is fixedly connected to the top surface of the base, and the heater is electrically connected to the electric heating tube.

[0012] Preferably, the inflation pump is fixedly connected to and connected to one end of the first intake pipe, the other end of the first intake pipe is connected to the three-piece, the three-piece is connected to one end of the second intake pipe, the other end of the second intake pipe is fixedly connected to and connected to one end of the heating pipe, the other end of the heating pipe is fixedly connected to and connected to one end of the cross pipe, the other end of the cross pipe is fixedly connected to and connected to one end of the metal bellows, the other end of the metal bellows is fixedly connected to and connected to a joint, the joint is connected to the air inlet, the cross pipe is fixedly connected to and connected to the first solenoid valve and the air pressure sensor near the heating component, and the second solenoid valve is fixedly connected to the air deflation main pipe.

[0013] Preferably, an inner cavity is defined inside the bottom strip, the top of the inner cavity is connected to a top slide groove, one end of the inner cavity is rotatably connected to the first driving pulley, the other end of the inner cavity is rotatably connected to the first driven pulley, the first driving pulley and the first driven pulley are sleeved with a first synchronous belt, the first synchronous belt is fixedly connected to a top slider, one side of the bottom strip is fixedly embedded with a first servo reduction motor, the shaft end of the first servo reduction motor is fixedly connected to the shaft of the first driving pulley, a first guide rod is horizontally fixed in the top slide groove, a first guide hole is horizontally defined on the top slider, and the first guide hole is slidably sleeved with the first guide rod.

[0014] Preferably, two first T-shaped slots are provided on one side of the two columns close to each other, a first T-shaped slider is vertically slidably connected in each of the first T-shaped slots, the first T-shaped slider is fixedly connected to the end of the cross bar, a second T-shaped slot is provided on the bottom surface of the cross bar, a second T-shaped slider is horizontally slidably connected in the second T-shaped slot, the second T-shaped slider is fixedly connected to the top surface of the arc rod, and the top surfaces of the two columns are fixedly connected to the top rod.

[0015] Preferably, an arc groove is provided on the bottom surface of the arc rod, an arc slider is connected in horizontal sliding in the arc groove, the bottom surface of the arc slider is fixed to the base frame, the thermal imaging camera is fixed to the bottom surface of the base frame, an arc cavity is provided on the top surface of the arc groove, a plurality of small gears are connected in uniform rotation in the arc cavity, the top surface of the arc slider is fixed to an arc rack, the arc rack is meshed and connected to a plurality of small gears at any position, a short shaft is fixed to each of the small gear rotating shafts, two synchronous pulleys are fixedly sleeved on each of the short shafts, and two adjacent small gears are connected to each other. The third synchronous belt is sleeved on the synchronous pulley on the wheel, the short shaft end of the pinion located in the middle is fixedly connected to the driving shaft, the fourth servo reduction motor is fixedly embedded in the center of the side wall of the arc rod, the rotating shaft end of the fourth servo reduction motor is located inside the arc rod and fixedly connected to the second driving pulley, the second driven pulley is fixedly sleeved on the driving shaft, the second driving pulley and the second driven pulley are sleeved with the second synchronous belt, the arc guide rod is fixedly connected in the arc groove, the arc slide block is provided with an arc hole, and the arc hole is slidably sleeved on the arc guide rod.

[0016] Preferably, each of the first T-shaped slide grooves is vertically rotatably connected to a first screw rod, the first T-shaped slider is fixedly connected to the first screw rod, the first screw rod is threadedly connected to the first threaded sleeve, the top rod is horizontally rotatably connected to a long rod, the long rod is located above the two columns and is fixedly sleeved with two first active bevel gears, the top end of the first screw rod is located in the top rod and fixedly connected to the first driven bevel gear, the first active bevel gear is meshedly connected to the first driven bevel gear, the end of the top rod is fixedly connected to the second servo reduction motor, the rotating shaft end of the second servo reduction motor is fixedly connected to the end of the long rod, the second T-shaped slide groove is horizontally rotatably connected to the second screw rod, the second T-shaped slider is fixedly connected to the second screw rod, the second screw rod is threadedly connected to the second threaded sleeve, the top surface of the cross rod end is fixedly connected to the third servo reduction motor, the rotating shaft end of the third servo reduction motor is located inside the cross rod and fixedly connected to the second active bevel gear, the second screw rod is fixedly connected to the second driven bevel gear at one end close to the third servo reduction motor, and the second active bevel gear is meshedly connected to the second driven bevel gear.

[0017] Preferably, the tank body fixing assembly includes a plate body fixedly embedded in the top surface of the base, two T-shaped top grooves are provided on both sides of the top surface of the plate body, two sliding blocks are horizontally slidably connected in the two T-shaped top grooves, two top sliding openings are provided on both sides of the top surface of the sliding block, two slide plates are horizontally slidably connected in the two top sliding openings, two clamps are fixedly connected to the top ends of the two slide plates, and the support legs are located between the two clamps.

[0018] Preferably, the two T-shaped top grooves are horizontally rotatably connected to a total of two third screws, the sliding block is fixedly connected to the third threaded sleeve, the third screw is threadedly connected to the third threaded sleeve, a reversing cavity is opened in the center of the plate body, the two third screws are horizontally fixedly connected to two rotating rods close to one end, the two rotating rod ends are located in the reversing cavity and fixedly connected to two second bevel gears, the top and bottom surfaces of the reversing cavity are rotatably connected to the two first bevel gears, the two sides of the first bevel gear are meshed and connected to the two second bevel gears, the side wall of one end of the plate body is fixedly embedded with the sixth servo reduction motor, the rotating shaft end of the sixth servo reduction motor is fixedly connected to the driving rod, and the end of the driving rod is fixedly connected to the third active bevel gear, one of the third screws is close to one end of the driving rod The third driven bevel gear is fixedly connected, and the third driving bevel gear is meshed and connected to the third driven bevel gear. A transmission cavity is opened inside the side wall of the sliding block, and a short block is fixedly connected to one side of the transmission cavity at the top of one of the sliding plates, and a short block is fixedly connected to one side of the transmission cavity at the bottom of the other sliding plate. A transverse groove is opened on one side of the bottom of the transmission cavity, and a transverse groove is opened on one side of the top of the transmission cavity. The two short blocks penetrate the two transverse grooves and are fixedly connected to two tooth plates. The two tooth plates are located in the transmission cavity, and the middle part of the transmission cavity is rotatably connected to the driving gear. The top and bottom surfaces of the driving gear are meshed and connected to the two tooth plates. The side wall of the sliding block is fixedly embedded with the fifth servo reduction motor, and the shaft end of the fifth servo reduction motor is fixedly connected to the shaft of the driving gear.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the present invention is inflating, the pressure sensor contacts the surface of the hydrogen storage tank. After the hydrogen storage tank is continuously inflated and pressurized, the expansion phenomenon will generate pressure on the pressure sensor. If the pressure is greater than the standard value, the inflation is immediately stopped, and it can be judged that the hydrogen storage tank has a large defect. Thereafter, the vacuum tank in the pressure relief component in the inflation mechanism is cooperated to quickly discharge excess gas to avoid the phenomenon of bursting when the large hydrogen storage tank is inflated and pressurized, making the detection process safer. When it is necessary to confirm the leakage point of an unqualified hydrogen storage tank, heated air is filled in through the heating component in the inflation mechanism, and the hydrogen storage tank is thermally imaged by a thermal imaging camera that can move in multiple directions. Hot air will leak out from the leakage point, and the position of the leakage point can be determined, which is convenient for repairing unqualified products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure in the first and second embodiments of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the inflation mechanism in the first and second embodiments of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the expansion detection assembly in the first and second embodiments of the present invention;

[0024] Figure 4 It is a schematic diagram of the cross-section structure of the expansion detection assembly in the first and second embodiments of the present invention;

[0025] Figure 5 It is a schematic diagram of the cross-section structure of the thermal imaging detection mechanism in the first and second embodiments of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the heating assembly in two embodiments of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the arc rod in two embodiments of the present invention;

[0028] Figure 8 It is a schematic diagram of the cross-section structure of the arc rod in two embodiments of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the tank fixing assembly in two embodiments of the present invention;

[0030] Fig.10 It is a schematic diagram of the cross-section structure of the tank fixing assembly in two embodiments of the present invention;

[0031] Fig.11It is a schematic diagram of the structure of the sliding block in two embodiments of the present invention;

[0032] Fig.12 It is a schematic diagram of the cross-section structure of the sliding block in two embodiments of the present invention;

[0033] Fig.13 Schematic diagram of the cross-section structure of the side wall of the sliding block in two embodiments of the present invention.

[0034] In the figure: 1. base; 2. hydrogen storage tank; 3. inflation mechanism; 4. expansion detection assembly; 5. thermal imaging detection mechanism; 6. tank fixing assembly; 11. support plate; 12. controller; 13. analyzer; 14. display screen; 21. air inlet; 22. exhaust port; 23. support leg; 31. cross pipe; 32. heating assembly; 33. air relief main pipe; 34. pressure relief assembly; 35. inflation pump; 36. triple piece; 37. first air inlet pipe; 38. second air inlet pipe; 39. first solenoid valve; 310. air pressure sensor; 311. second solenoid valve; 312. metal bellows; 313. joint; 321. heating pipe; 322. heating cover; 323. electric heating pipe; 324. heater ; 341, vacuum tank; 342, vacuum pump; 343, main pressure relief pipe; 344, sub-pressure relief pipe; 345, natural pressure relief pipe; 346, third solenoid valve; 41, bottom strip; 42, top slide; 43, top slider; 44, stand; 45, arc frame; 46, electric push rod; 47, pressure sensor; 48, inner cavity; 49, first driving pulley; 410, first driven pulley; 411, first synchronous belt; 412, first servo reduction motor; 413, first guide rod; 414, first guide hole; 51, column; 53, cross bar; 54, arc rod; 55, thermal imaging camera; 56, first T-type slide; 57, first T-type slider; 58, second T-type slide; 59 , second T-shaped slider; 510, arc groove; 511, arc slider; 512, chassis; 513, first screw rod; 514, first threaded sleeve; 515, push rod; 516, long rod; 517, first active bevel gear; 518, first driven bevel gear; 519, second servo reduction motor; 520, second screw rod; 521, second threaded sleeve; 522, third servo reduction motor; 523, second active bevel gear; 524, second driven bevel gear; 525, arc cavity; 526, pinion; 527, arc rack; 528, short shaft; 529, synchronous pulley; 530, third synchronous belt; 531, fourth servo reduction motor; 532, second active pulley; 533, driving shaft; 534, second driven pulley; 535, second synchronous belt; 536, arc-shaped guide rod; 537, arc-shaped hole; 61, plate; 62, T-shaped top groove; 63, sliding block; 64, clamping plate; 65, top sliding mouth; 66, sliding plate; 67, transmission cavity; 68, transverse groove; 69, short block; 610, tooth plate; 611, driving gear; 612, fifth servo reduction motor; 615, third screw rod; 616, third threaded sleeve; 617, reversing cavity; 618, rotating rod; 619, first bevel gear; 620, second bevel gear; 621, sixth servo reduction motor; 622, driving rod; 623, third driving bevel gear; 624, third driven bevel gear. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0036] See also Figure 1-5 The present invention provides a technical solution: a safety protection device for detecting the air tightness of a hydrogen storage tank, comprising a base 1 and a hydrogen storage tank 2, one end of the hydrogen storage tank 2 is fixedly connected to and communicated with an air inlet 21, the other end of the hydrogen storage tank 2 is fixedly connected to and communicated with an exhaust port 22, two legs 23 are fixedly connected to both sides of the bottom surface of the hydrogen storage tank 2, a controller 12 and an analyzer 13 are fixedly connected to the top surface of the base 1, a display screen 14 is fixedly connected to the analyzer 13, a tank body fixing component 6 is arranged on the top surface of one side of the base 1, the hydrogen storage tank 2 is arranged on the tank body fixing component 6, two support plates 11 are vertically fixedly connected to the top surface of the base 1 at the positions on both sides of the hydrogen storage tank 2, a thermal imaging detection mechanism 5 is arranged on the top surfaces of the two support plates 11, an expansion detection component 4 is arranged on the top surface of the base 1 near the middle of the hydrogen storage tank 2, and an inflation mechanism 3 is also arranged on the top surface of the base 1;

[0037] The inflation mechanism 3 includes a transverse tube 31, a heating assembly 32, a pressure relief assembly 34, an air pump 35 and a triplet 36. The triplet 36 and the air pump 35 are fixedly connected to the top surface of the base 1. The transverse tube 31 is horizontally fixedly sleeved on one of the support plates 11. The air pump 35 is connected to the triplet 36. The triplet 36 is connected to the heating assembly 32. The heating assembly 32 is connected to the transverse tube 31. The middle part of the transverse tube 31 is horizontally fixed and connected to the air relief main pipe 33. The air relief main pipe 33 is connected to the pressure relief assembly 34.

[0038] The expansion detection component 4 includes a bottom strip plate 41, which is fixedly embedded in the top surface of the base 1. A top slide groove 42 is provided on the top surface of the bottom strip plate 41. A top slide block 43 is horizontally slidably connected in the top slide groove 42. The top surface of the top slide block 43 is fixedly connected to a stand 44. The top of the stand 44 is fixedly connected to an arc frame 45. A plurality of electric push rods 46 are fixedly sleeved on the arc frame 45. The output end of the electric push rod 46 is fixedly connected to a pressure sensor 47. When inflating, the pressure sensor 47 contacts the surface of the hydrogen storage tank 2. After the hydrogen storage tank 2 is continuously inflated and pressurized, the expansion phenomenon will generate pressure on the pressure sensor 47. If the pressure is greater than the standard value, the inflation is stopped immediately, and it can be judged that the hydrogen storage tank 2 has a large defect. Then, the pressure relief component 34 in the inflation mechanism 3 is cooperated to quickly discharge excess gas to avoid the phenomenon of explosion of the large hydrogen storage tank 2 when inflated and pressurized, making the detection process safer.

[0039] The thermal imaging detection mechanism 5 includes two columns 51, and the two columns 51 are vertically fixed to the top of the two support plates 11. A cross bar 53 is vertically slidably arranged between the two columns 51, and an arc rod 54 is horizontally slidably arranged on the bottom of the cross bar 53. A thermal imaging camera 55 is slidably arranged on the bottom of the arc rod 54. When it is necessary to confirm the leakage point of the unqualified hydrogen storage tank 2, heated air is filled into it through the heating component 32 in the charging mechanism 3, and the hydrogen storage tank 2 is thermally imaged by the thermal imaging camera 55 that can move in multiple directions. Hot air will leak out from the leakage point, so the position of the leakage point can be determined, which is convenient for repairing the unqualified products. Example 2

[0040] See also Figure 1-13 , which is the first embodiment of the present invention. This embodiment is based on the previous embodiment. The pressure relief assembly 34 includes a vacuum tank 341 and a main pressure relief pipe 343. The vacuum tank 341 is fixedly connected to the top surface of the base 1. The top surface of the vacuum tank 341 is fixedly connected to and connected to the vacuum pump 342. The main pressure relief pipe 343 is fixedly connected to and connected to the main air relief pipe 33. One side of the end of the main pressure relief pipe 343 is fixedly connected to and connected to the sub-pressure relief pipe 344, and the other side of the end of the main pressure relief pipe 343 is fixedly connected to and connected to the natural pressure relief pipe 345. The sub-pressure relief pipe 344 is fixedly connected to and connected to the vacuum tank 341. The sub-pressure relief pipe 344 is fixedly connected to and connected to the third solenoid valve 346. When the pressure is relieved, the vacuum tank 341 is evacuated by the vacuum pump 342, which can quickly generate negative pressure to discharge the excess air in the hydrogen storage tank 2. It is used for emergency pressure relief of the hydrogen storage tank 2 with large defects.

[0041] The heating assembly 32 includes a heating tube 321, and a plurality of heating covers 322 are fixedly sleeved on the circumference of the heating tube 321. The plurality of heating covers 322 are fixedly connected to the top surface of the base 1. An electric heating tube 323 is fixedly connected inside the heating cover 322. A heater 324 is fixedly connected to the top surface of the base 1. The heater 324 is electrically connected to the electric heating tube 323, so as to heat the air and detect the leakage point.

[0042] The inflation pump 35 is fixedly connected to and connected with one end of the first air inlet pipe 37, the other end of the first air inlet pipe 37 is connected to the triplet 36, the triplet 36 is connected to one end of the second air inlet pipe 38, the other end of the second air inlet pipe 38 is fixedly connected to and connected with one end of the heating pipe 321, the other end of the heating pipe 321 is fixedly connected to and connected with one end of the cross pipe 31, the other end of the cross pipe 31 is fixedly connected to and connected with one end of the metal bellows 312, the other end of the metal bellows 312 is fixedly connected to and connected with the joint 313, the joint 313 is connected with the air inlet 21, the cross pipe 31 is fixedly connected to and connected with the first solenoid valve 39 and the air pressure sensor 310 near the heating component 32, the air leakage main pipe 33 is fixedly connected to and connected with the second solenoid valve 311, the air pressure sensor 310 is used to judge the pressure of the hydrogen storage tank 2, so as to judge whether the hydrogen storage tank 2 has reached the working pressure. After stopping the inflation, whether there is a leakage is judged according to whether the pressure is constant.

[0043] An inner cavity 48 is provided inside the bottom strip 41, and the top of the inner cavity 48 is connected to the top slide groove 42. One end of the inner cavity 48 is rotatably connected to the first driving pulley 49, and the other end of the inner cavity 48 is rotatably connected to the first driven pulley 410. The first driving pulley 49 and the first driven pulley 410 are sleeved with a first synchronous belt 411, and the first synchronous belt 411 is fixedly connected to the top slider 43. A first servo reduction motor 412 is fixedly embedded on one side of the bottom strip 41, and the rotating shaft end of the first servo reduction motor 412 is fixedly connected to the rotating shaft of the first driving pulley 49. A first guide rod 413 is horizontally fixed in the top slide groove 42, and a first guide hole 414 is horizontally provided on the top slider 43. The first guide hole 414 is slidably sleeved with the first guide rod 413, so that the pressure sensor 47 can move to contact the surface of the hydrogen storage tank 2.

[0044] Two first T-shaped slots 56 are provided on one side of the two columns 51 close to each other, and a first T-shaped slider 57 is vertically slidably connected in each first T-shaped slot 56. The first T-shaped slider 57 is fixedly connected to the end of the cross bar 53. A second T-shaped slot 58 is provided on the bottom surface of the cross bar 53. The second T-shaped slider 59 is horizontally slidably connected in the second T-shaped slot 58. The second T-shaped slider 59 is fixedly connected to the top surface of the arc rod 54. The top surfaces of the two columns 51 are fixedly connected to the top rod 515.

[0045] The bottom surface of the arc rod 54 is provided with an arc groove 510, and the arc slider 511 is horizontally slidably connected in the arc groove 510, and the bottom surface of the arc slider 511 is fixedly connected to the bottom surface of the base frame 512. The thermal imaging camera 55 is fixedly connected to the bottom surface of the base frame 512. The top surface of the arc groove 510 is provided with an arc cavity 525, and multiple small gears 526 are evenly rotated and connected in the arc cavity 525. The top surface of the arc slider 511 is fixedly connected to an arc rack 527, and the arc rack 527 is meshed and connected to multiple small gears 526 at any position. A short shaft 528 is fixedly connected to the rotating shaft of each small gear 526, and two synchronous pulleys 529 are fixedly sleeved on each short shaft 528. The synchronous pulleys 529 on the two adjacent small gears 526 are sleeved with a third synchronous belt 53 0, the end of the short shaft 528 on the small gear 526 in the middle is fixedly connected to the driving shaft 533, the center of the side wall of the arc rod 54 is fixedly embedded in the fourth servo reduction motor 531, the shaft end of the fourth servo reduction motor 531 is located inside the arc rod 54 and fixedly connected to the second driving pulley 532, the second driven pulley 534 is fixedly sleeved on the driving shaft 533, the second driving pulley 532 and the second driven pulley 534 are sleeved with the second synchronous belt 535, the arc guide rod 536 is fixedly connected in the arc groove 510, the arc slide block 511 is provided with an arc hole 537, the arc hole 537 is slidably sleeved on the arc guide rod 536, and the arc path movement of the thermal imaging camera 55 is realized by the fourth servo reduction motor 531.

[0046] A first screw rod 513 is vertically rotatably connected in each first T-shaped slide groove 56, a first threaded sleeve 514 is fixedly connected to the first T-shaped slider 57, the first screw rod 513 is threadedly connected to the first threaded sleeve 514, a push rod 515 is horizontally rotatably connected to a long rod 516, the long rod 516 is located above the two columns 51 and is fixedly sleeved with two first active bevel gears 517, the top end of the first screw rod 513 is located in the push rod 515 and is fixedly connected to the first driven bevel gear 518, the first active bevel gear 517 is meshedly connected to the first driven bevel gear 518, the end of the push rod 515 is fixedly connected to the second servo reduction motor 519, and the end of the rotating shaft of the second servo reduction motor 519 is fixedly connected to the end of the long rod 516 The second T-shaped slide groove 58 is horizontally rotated to connect the second screw rod 520, the second T-shaped slider 59 is fixedly connected to the second threaded sleeve 521, the second screw rod 520 is threadedly connected to the second threaded sleeve 521, the top surface of the end of the cross bar 53 is fixedly connected to the third servo reduction motor 522, the shaft end of the third servo reduction motor 522 is located inside the cross bar 53 and is fixedly connected to the second active bevel gear 523, the second screw rod 520 is fixedly connected to the second driven bevel gear 524 at one end close to the third servo reduction motor 522, the second active bevel gear 523 is meshedly connected to the second driven bevel gear 524, so that the arc rod 54 can perform biaxial movement to adjust the position, ensuring that the thermal imaging camera 55 can capture the entire hydrogen storage tank 2.

[0047] The tank body fixing assembly 6 includes a plate body 61 fixedly embedded on the top surface of the base 1, two T-shaped top grooves 62 are provided on both sides of the top surface of the plate body 61, two sliding blocks 63 are horizontally slidably connected in the two T-shaped top grooves 62, two top sliding openings 65 are provided on both sides of the top surface of the sliding block 63, two slide plates 66 are horizontally slidably connected in the two top sliding openings 65, two clamping plates 64 are fixed to the top of the two slide plates 66, the support legs 23 are located between the two clamping plates 64, and the sliding block 63 moves to the position of the two support legs 23 to facilitate fixing hydrogen storage tanks 2 of different sizes.

[0048] Two third screw rods 615 are horizontally rotatably connected in the two T-shaped top grooves 62, a third threaded sleeve 616 is fixed on the sliding block 63, the third screw rod 615 is threadedly connected to the third threaded sleeve 616, a reversing cavity 617 is opened in the center of the plate body 61, the two third screw rods 615 are horizontally fixed to two rotating rods 618 near one end, the ends of the two rotating rods 618 are located in the reversing cavity 617 and fixed to two second bevel gears 620, the top and bottom surfaces of the reversing cavity 617 are rotatably connected to the two first bevel gears 619, the two sides of the first bevel gear 619 are meshed and connected to the two second bevel gears 620, the side wall at one end of the plate body 61 is fixedly embedded with the sixth servo reduction motor 621, the rotating shaft end of the sixth servo reduction motor 621 is fixedly connected to the driving rod 622, the end of the driving rod 622 is fixedly connected to the third active bevel gear 623, one of the third screw rods 615 is close to one end of the driving rod 622 The third driven bevel gear 624 is fixedly connected, and the third driving bevel gear 623 is meshedly connected to the third driven bevel gear 624. A transmission cavity 67 is opened inside the side wall of the sliding block 63, and a short block 69 is fixedly connected to the top of one of the sliding plates 66 near the side of the transmission cavity 67, and a short block 69 is fixedly connected to the bottom of the other sliding plate 66 near the side of the transmission cavity 67. A transverse groove 68 is opened on one side of the bottom of the transmission cavity 67, and a transverse groove 68 is opened on one side of the top of the transmission cavity 67. The two short blocks 69 pass through the two transverse grooves 68 and are fixedly connected to two tooth plates 610. The two tooth plates 610 are located in the transmission cavity 67, and the middle part of the transmission cavity 67 is rotatably connected to the driving gear 611. The top and bottom surfaces of the driving gear 611 are meshedly connected to the two tooth plates 610. The side wall of the sliding block 63 is fixedly embedded with the fifth servo reduction motor 612, and the shaft end of the fifth servo reduction motor 612 is fixedly connected to the shaft of the driving gear 611. Example 3

[0049] See also Figure 1-13, which is the second embodiment of the present invention. This embodiment is based on the above two embodiments. When the present invention is used, the hydrogen storage tank 2 is fixed on the tank body fixing component 6, the joint 313 is connected to the air inlet 21, the exhaust port 22 is blocked, the first solenoid valve 39 in the inflation mechanism 3 is opened, the second solenoid valve 311 and the third solenoid valve 346 are closed, and then the pressure sensor 47 in the expansion detection component 4 contacts the surface of the hydrogen storage tank 2, the inflation pump 35 is started to inflate, and the heater 324 is kept closed until the pressure in the hydrogen storage tank 2 reaches the pressure of the working state. At this time, the pressure sensor 47 detects the pressure generated by the expansion phenomenon in a consistent manner during the process. If the pressure exceeds the standard When the pressure exceeds the standard value, the air pump 35 is stopped immediately, the first solenoid valve 39 is closed, and the second solenoid valve 311 and the third solenoid valve 346 are opened. The negative pressure generated by the vacuum tank 341 is used to quickly discharge the excess air in the hydrogen storage tank 2. The hydrogen storage tank 2 is then removed and it is judged to be a seriously unqualified product. If the pressure generated by the expansion phenomenon does not exceed the standard value, the pressure in the hydrogen storage tank 2 is made to reach the pressure of the working state, the first solenoid valve 39 is closed, and the inflation is stopped. The air pressure sensor 310 is used to judge whether the air pressure is constant. If it is constant, it means there is no leakage. If the air pressure keeps decreasing, it means there is a leakage. For the leaking hydrogen storage tank 2, the second solenoid valve 311 is opened. , the air is discharged through the natural pressure relief pipe 345, and at the same time, the heater 324 is started, and the air pump 35 is started to inflate and fill with hot air. When the original air in the hydrogen storage tank 2 is discharged, the second solenoid valve 311 is closed. At this time, the hot air fills the hydrogen storage tank 2. The hydrogen storage tank 2 is thermally imaged by a thermal imaging camera 55 that can move in multiple directions. Hot air will leak out of the leaking place, and the location of the leaking point can be determined. The standard value data for judging the expansion pressure in the above-mentioned is obtained by detecting the standard hydrogen storage tank 2; when the present invention is inflated, the pressure sensor 47 contacts the surface of the hydrogen storage tank 2. After the hydrogen storage tank 2 is continuously inflated and pressurized, the expansion phenomenon will occur at the pressure sensor 4 7, if the pressure is greater than the standard value, the inflation is stopped immediately, and it can be judged that the hydrogen storage tank 2 has a large defect. Then, the vacuum tank 341 in the pressure relief component 34 in the inflation mechanism 3 is cooperated to quickly discharge the excess gas to avoid the explosion of the large hydrogen storage tank 2 during inflation and pressurization, making the detection process safer; when it is necessary to confirm the leakage point of the unqualified hydrogen storage tank 2, heated air is filled into the heating component 32 in the inflation mechanism 3, and the hydrogen storage tank 2 is thermally imaged by the thermal imaging camera 55 that can move in multiple directions. Hot air will leak out of the leaking place, and the position of the leakage point can be determined, which is convenient for repairing the unqualified products.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for detecting the air tightness of a hydrogen storage tank, comprising a base (1) and a hydrogen storage tank (2), wherein one end of the hydrogen storage tank (2) is fixedly connected to and communicated with an air inlet (21), and the other end of the hydrogen storage tank (2) is fixedly connected to and communicated with an exhaust port (22), two legs (23) are fixedly connected to both sides of the bottom surface of the hydrogen storage tank (2), a controller (12) and an analyzer (13) are fixedly connected to the top surface of the base (1), and a display screen (14) is fixedly connected to the analyzer (13), characterized in that: A tank body fixing assembly (6) is arranged on the top surface of one side of the base (1), the hydrogen storage tank (2) is arranged on the tank body fixing assembly (6), the top surface of the base (1) is located at two sides of the hydrogen storage tank (2) and vertically fixed to two support plates (11), the top surfaces of the two support plates (11) are provided with a thermal imaging detection mechanism (5), the top surface of the base (1) is provided with an expansion detection assembly (4) near the middle of the hydrogen storage tank (2), and the top surface of the base (1) is also provided with an inflation mechanism (3); The inflation mechanism (3) comprises a transverse tube (31), a heating component (32), a pressure relief component (34), an inflation pump (35) and a triple joint (36); the triple joint (36) and the inflation pump (35) are fixedly connected to the top surface of the base (1); the transverse tube (31) is horizontally fixedly sleeved on one of the support plates (11); the inflation pump (35) is connected to the triple joint (36); the triple joint (36) is connected to the heating component (32); the heating component (32) is connected to the transverse tube (31); the middle part of the transverse tube (31) is horizontally fixedly connected to and connected to the inflation main pipe (33); the inflation main pipe (33) is connected to the pressure relief component (34); The expansion detection assembly (4) comprises a bottom strip (41), the bottom strip (41) is fixedly embedded in the top surface of the base (1), a top slide groove (42) is provided on the top surface of the bottom strip (41), a top slider (43) is horizontally slidably connected in the top slide groove (42), the top surface of the top slider (43) is fixedly connected to a stand frame (44), the top end of the stand frame (44) is fixedly connected to an arc frame (45), a plurality of electric push rods (46) are fixedly sleeved on the arc frame (45), and the output end of the electric push rod (46) is fixedly connected to a pressure sensor (47); The thermal imaging detection mechanism (5) comprises two upright posts (51), the two upright posts (51) are vertically fixed to the top ends of the two support plates (11), a cross bar (53) is vertically slidably arranged between the two upright posts (51), an arc-shaped rod (54) is horizontally slidably arranged on the bottom surface of the cross bar (53), a thermal imaging camera (55) is slidably arranged on the bottom surface of the arc-shaped rod (54), and an arc-shaped groove (510) is provided on the bottom surface of the arc-shaped rod (54). The arc-shaped groove (510) is horizontally slidably connected to an arc-shaped slider (511), the bottom surface of the arc-shaped slider (511) is fixedly connected to a base frame (512), the thermal imaging camera (55) is fixedly connected to the bottom surface of the base frame (512), the top surface of the arc-shaped groove (510) is provided with an arc-shaped cavity (525), a plurality of small gears (526) are evenly rotatably connected in the arc-shaped cavity (525), and the top surface of the arc-shaped slider (511) is fixedly connected to an arc-shaped rack (527), The arc-shaped rack (527) meshes with a plurality of pinions (526) at any position, a short shaft (528) is fixedly connected to the rotating shaft of each pinion (526), ​​two synchronous pulleys (529) are fixedly sleeved on each short shaft (528), the synchronous pulleys (529) on two adjacent pinions (526) are sleeved on a third synchronous belt (530), the end of the short shaft (528) on the pinion (526) located in the middle is fixedly connected to a driving shaft (533), the center of the side wall of the arc-shaped rod (54) is fixedly embedded with a fourth servo reduction motor (531), the rotating shaft end of the fourth servo reduction motor (531) is located inside the arc-shaped rod (54) and fixedly connected to a second driving pulley (532), a second driven pulley (534) is fixedly sleeved on the driving shaft (533), and a second synchronous belt (535) is sleeved on the second driving pulley (532) and the second driven pulley (534); The pressure relief assembly (34) comprises a vacuum tank (341) and a main pressure relief pipe (343); the vacuum tank (341) is fixedly connected to the top surface of the base (1); the top surface of the vacuum tank (341) is fixedly connected to and connected to a vacuum pump (342); the main pressure relief pipe (343) is fixedly connected to and connected to the main air relief pipe (33); one side of the end of the main pressure relief pipe (343) is fixedly connected to and connected to a sub-pressure relief pipe (344); the other side of the end of the main pressure relief pipe (343) is fixedly connected to and connected to a natural pressure relief pipe (345); the sub-pressure relief pipe (344) is fixedly connected to and connected to the vacuum tank (341); and the sub-pressure relief pipe (344) is fixedly connected to and connected to a third solenoid valve (346); The tank body fixing assembly (6) comprises a plate body (61) fixedly embedded on the top surface of the base (1), two T-shaped top grooves (62) are provided on both sides of the top surface of the plate body (61), two sliding blocks (63) are horizontally slidably connected in the two T-shaped top grooves (62), two top sliding openings (65) are provided on both sides of the top surface of the sliding block (63), two slide plates (66) are horizontally slidably connected in the two top sliding openings (65), the top ends of the two slide plates (66) are fixedly connected to two clamping plates (64), and the support leg (23) is located between the two clamping plates (64); Two third screw rods (615) are horizontally rotatably connected in the two T-shaped top grooves (62); a third threaded sleeve (616) is fixedly connected to the sliding block (63); the third screw rod (615) is threadedly connected to the third threaded sleeve (616); a reversing cavity (617) is provided at the center of the plate body (61); two third screw rods (615) are horizontally fixedly connected to two rotating rods (618) at one end close to each other; the ends of the two rotating rods (618) are located in the reversing cavity (617) and are fixedly connected to two second bevel gears (620); The top and bottom surfaces of the reversing cavity (617) are rotatably connected to two first bevel gears (619), and the two sides of the first bevel gear (619) are meshedly connected to two second bevel gears (620). A side wall at one end of the plate body (61) is fixedly connected to a sixth servo reduction motor (621), and a rotating shaft end of the sixth servo reduction motor (621) is fixedly connected to a driving rod (622), and an end of the driving rod (622) is fixedly connected to a third active bevel gear (623). One end of the third screw rod (615) close to the driving rod (622) is fixedly connected to the first driving bevel gear (623). The third driven bevel gear (624) is meshed with the third driving bevel gear (623) and is connected to the third driven bevel gear (624). A transmission cavity (67) is provided inside the side wall of the sliding block (63). A short block (69) is fixedly connected to the top of one of the sliding plates (66) near the transmission cavity (67), and a short block (69) is fixedly connected to the bottom of the other sliding plate (66) near the transmission cavity (67). A transverse groove (68) is provided on one side of the bottom of the transmission cavity (67), and a transverse groove (68) is provided on one side of the top of the transmission cavity (67). The two short blocks (69) penetrate the two transverse grooves (68) and are fixedly connected to the two tooth plates (610). The two tooth plates (610) are located in the transmission cavity (67). The middle part of the transmission cavity (67) is rotatably connected to the driving gear (611). The top and bottom surfaces of the driving gear (611) are meshed and connected to the two tooth plates (610). The side wall of the sliding block (63) is fixedly embedded with the fifth servo reduction motor (612). The shaft end of the fifth servo reduction motor (612) is fixedly connected to the shaft of the driving gear (611).

2. A safety protection device for detecting air tightness of a hydrogen storage tank according to claim 1, characterized in that: The heating assembly (32) comprises a heating tube (321), a plurality of heating covers (322) are fixedly sleeved on the circumference of the heating tube (321), the plurality of heating covers (322) are fixedly connected to the top surface of the base (1), an electric heating tube (323) is fixedly connected inside the heating cover (322), a heater (324) is fixedly connected to the top surface of the base (1), and the heater (324) is electrically connected to the electric heating tube (323).

3. A safety protection device for detecting air tightness of a hydrogen storage tank according to claim 2, characterized in that: The inflation pump (35) is fixedly connected to and connected with one end of the first air intake pipe (37); the other end of the first air intake pipe (37) is connected to a triplet (36); the triplet (36) is connected to one end of the second air intake pipe (38); the other end of the second air intake pipe (38) is fixedly connected to and connected with one end of a heating pipe (321); the other end of the heating pipe (321) is fixedly connected to and connected with one end of a transverse pipe (31); the other end of the transverse pipe (31) is fixedly connected to and connected with one end of a metal bellows (312); the other end of the metal bellows (312) is fixedly connected to and connected with a joint (313); the joint (313) is connected to an air intake port (21); the transverse pipe (31) is fixedly connected to and connected with a first solenoid valve (39) and an air pressure sensor (310) near a position of the heating component (32); the air release main pipe (33) is fixedly connected to and connected with a second solenoid valve (311).

4. A safety protection device for detecting air tightness of a hydrogen storage tank according to claim 1, characterized in that: An inner cavity (48) is provided inside the bottom strip (41), and the top of the inner cavity (48) is connected to the top slide groove (42). One end of the inner cavity (48) is rotatably connected to the first driving pulley (49), and the other end of the inner cavity (48) is rotatably connected to the first driven pulley (410). The first driving pulley (49) and the first driven pulley (410) are sleeved with a first synchronous belt (411), and the first synchronous belt (411) is fixedly connected to the top slider (43). One side of the bottom strip (41) is fixedly embedded with a first servo reduction motor (412), and the rotating shaft end of the first servo reduction motor (412) is fixedly connected to the rotating shaft of the first driving pulley (49). A first guide rod (413) is horizontally fixed in the top slide groove (42), and a first guide hole (414) is horizontally provided on the top slider (43), and the first guide hole (414) is slidably sleeved with the first guide rod (413).

5. A safety protection device for detecting air tightness of a hydrogen storage tank according to claim 1, characterized in that: Two first T-shaped slots (56) are provided on one side of the two columns (51) close to each other, and a first T-shaped slider (57) is vertically slidably connected in each of the first T-shaped slots (56). The first T-shaped slider (57) is fixedly connected to the end of the cross bar (53). A second T-shaped slot (58) is provided on the bottom surface of the cross bar (53). A second T-shaped slider (59) is horizontally slidably connected in the second T-shaped slot (58). The second T-shaped slider (59) is fixedly connected to the top surface of the arc rod (54). A top rod (515) is fixedly connected to the top surfaces of the two columns (51). An arc guide rod (536) is fixedly connected in the arc slot (510). An arc hole (537) is provided on the arc slider (511), and the arc hole (537) is slidably connected to the arc guide rod (536).

6. A safety protection device for detecting air tightness of a hydrogen storage tank according to claim 5, characterized in that: A first screw rod (513) is vertically rotatably connected in each of the first T-shaped slide grooves (56); a first threaded sleeve (514) is fixedly connected to the first T-shaped slide block (57); the first screw rod (513) is threadedly connected to the first threaded sleeve (514); the push rod (515) is horizontally rotatably connected to a long rod (516); the long rod (516) is located above the two columns (51) and is fixedly sleeved with two first active bevel gears (517); the top end of the first screw rod (513) is located in the push rod (515) and is fixedly connected to a first driven bevel gear (518); the first active bevel gear (517) is meshedly connected to the first driven bevel gear (518); the end of the push rod (515) is fixedly connected to a second servo reduction motor (519); and the second The rotating shaft end of the servo reduction motor (519) is fixedly connected to the end of the long rod (516); the second screw rod (520) is horizontally rotatably connected in the second T-shaped slide groove (58); the second threaded sleeve (521) is fixedly connected to the second T-shaped slide block (59); the second screw rod (520) is threadedly connected to the second threaded sleeve (521); the top surface of the end of the cross bar (53) is fixedly connected to the third servo reduction motor (522); the rotating shaft end of the third servo reduction motor (522) is located inside the cross bar (53) and is fixedly connected to the second active bevel gear (523); the second screw rod (520) is fixedly connected to the second driven bevel gear (524) at one end close to the third servo reduction motor (522); and the second active bevel gear (523) is meshedly connected to the second driven bevel gear (524).

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