Liquid hydrogen storage tank detection device and method

Abstract

The present invention provides a liquid hydrogen storage tank detection device and method, which belongs to the technical field of tank sealing pressure detection. It includes an operating table, one side of the operating table is fixedly connected to a detection table, the interior of the detection table is provided with a detection cavity, the inner wall of the detection cavity is fixedly connected to a sliding rod, the side of the detection cavity close to the operating table is fixedly connected to a limit plate, and the side of the detection cavity away from the operating table is fixedly connected to a telescopic rod. The present invention provides a tank support device, and the first rotating frame unit, the second rotating frame unit and the third rotating frame unit cooperate with each other to support the liquid hydrogen storage tank. At the same time, when placing the liquid hydrogen storage tank, the first rotating frame unit, the second rotating frame unit and the third rotating frame unit are folded and pulled out, so that it is convenient for the detection personnel to place the liquid hydrogen storage tank, avoiding the problem that the liquid hydrogen storage tank is inconvenient to place due to the small internal space of the detection cavity, and the operation is simple, saving operation time.

Description

Technical Field

[0001] The present invention relates to the technical field of tank sealing pressure detection, and in particular to a liquid hydrogen storage tank detection device and method. Background Art

[0002] Hydrogen storage tanks are containers for storing liquid hydrogen. They are usually used for long-term storage and transportation of liquid hydrogen. Liquid hydrogen is a low-temperature, low-density gas. When its temperature drops to an extremely low level, hydrogen will liquefy into liquid hydrogen. Liquid hydrogen storage tanks need to meet special requirements to ensure their safety, stability and effectiveness.

[0003] The water pressure test of liquid hydrogen storage tanks is a common test method used to verify the structural strength and sealing performance of the tank under the design pressure. This test is an important part of tank manufacturing and quality control, especially for equipment such as liquid hydrogen storage tanks that involve low temperature, high pressure and flammable gases. It is crucial to ensure that they can operate safely and stably during use.

[0004] The existing water pressure test of liquid hydrogen storage tanks is to place the liquid hydrogen storage tank in a box for a water pressure injection test. Due to the large volume of the tank, it is inconvenient to put it into the box. At the same time, when the tank mouth is sealed, the flange is fixed by bolts, and the sealing operation is cumbersome. Therefore, the present application provides a liquid hydrogen storage tank detection device and method to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a liquid hydrogen storage tank detection device and method to solve the problem that the existing liquid hydrogen storage tank water pressure test is to place the liquid hydrogen storage tank in a box for water pressure injection test. Due to the large volume of the tank body, it is inconvenient to put it in the box. At the same time, when the tank mouth is sealed, the flange is fixed by bolts for sealing, and the sealing operation is cumbersome.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A liquid hydrogen storage tank detection device comprises an operating table, one side of the operating table is fixedly connected to the detection table, a detection cavity is opened inside the detection table, a sliding rod is fixedly connected to the inner wall of the detection cavity, a side of the detection cavity close to the operating table is fixedly connected to a limit plate, and a side of the detection cavity away from the operating table is fixedly connected to a telescopic rod; the bottom of the detection cavity is fixedly connected to a detection base plate adapted to the bottom thereof; a tank support device, located on the detection base plate, the tank support device is connected to the detection base plate, and the tank support device is used to support the liquid hydrogen storage tank; the tank support device comprises a first rotating frame unit, a second rotating frame unit and a third rotating frame unit connected to the detection base plate, the first rotating frame unit is connected to the second rotating frame unit, and the second rotating frame unit is connected to the third rotating frame unit; a tank sealing device, located at the output end of the telescopic rod, the tank sealing device is connected to the output end of the telescopic rod, and the tank sealing device is used to seal and inject water into the tank mouth of the liquid hydrogen storage tank; and also comprises a cover plate device for cooperating with the tank support device to limit and fix the liquid hydrogen storage tank.

[0008] Optionally, the first rotating frame unit includes a rotating column rotatably connected to the detection base plate, the outer wall of the rotating column is fixedly connected to a ring-shaped rotating block, the top of the rotating column is fixedly connected to a first support block, one side of the first support block is fixedly connected to a base baffle, the outer wall of the rotating column is fixedly connected to a limiting slide below the base baffle, a third connecting rod is fixedly connected to the relative position of the outer wall of the rotating column and the limiting slide, the bottom end of the third connecting rod is fixedly connected to a second slide seat, a U-shaped tank groove matching the outer diameter of the liquid hydrogen storage tank is opened on the top of the first support block, and the limiting slide is slidably connected to the limiting plate.

[0009] Optionally, the second rotating frame unit includes a fourth connecting rod fixedly connected to the third connecting rod, one end of the fourth connecting rod is fixedly connected to the first supporting base plate, the side of the first supporting base plate away from the fourth connecting rod is fixedly connected to a U-shaped connecting column, the top of the first supporting base plate is fixedly connected to a second support block, the bottom of the first supporting base plate is fixedly connected to a fifth connecting rod, the bottom end of the fifth connecting rod is fixedly connected to a third slide seat, and the top of the second support block is provided with an arc-shaped tank groove matching the outer diameter of the liquid hydrogen storage tank.

[0010] The cam is connected with the second support plate at the bottom end thereof to form a rotation axis, and the cam is connected with the first support plate at the bottom end thereof to form a rotation axis.

[0011] Optionally, a first rotating groove adapted to match the rotating column is opened at the top of the detection base plate, a limiting groove adapted to match the annular rotating block is opened on the inner wall of the first rotating groove, a first sliding groove is opened at the top of the detection base plate, a second sliding groove is opened at the top of the detection base plate, a second sliding groove is opened at the top of the detection base plate, and a second rotating groove adapted to match the rotating disk is opened at the top of the detection base plate.

[0012] Optionally, the can sealing device includes a sleeve fixedly connected to the output end of the telescopic rod, a sealing extrusion groove is provided at the end of the sleeve away from the telescopic rod, a water pipe through-hole penetrating both ends is provided at the center position of the sleeve, a plurality of evenly distributed annular grooves are provided on one side of the sealing extrusion groove, a second connecting rod is fixedly connected to the outer wall of the sleeve, a first sliding seat is fixedly connected to the bottom end of the second connecting rod, an elastic strut is connected to one side of the sealing extrusion groove, a first connecting rod perpendicular to the second connecting rod is fixedly connected to the outer wall of the sleeve, a slide cylinder is fixedly connected to one end of the first connecting rod, and the slide cylinder is sleeved on the outer wall of the slide rod; a third slide groove matching with the first sliding seat is provided at the top of the detection base plate at a position corresponding to the first sliding seat.

[0013] Optionally, the elastic cage is composed of a plurality of elastic struts uniformly distributed in a ring shape; the elastic struts are connected by a fixed section, a supporting section, an extending section and a deforming section, the fixed section is a strip structure, the two ends of the fixed section are respectively fixed to the inner wall of the sealing extrusion groove and one end of the supporting section, the supporting section is an outward convex structure, the end of the supporting section away from the fixed section is fixedly connected with the extending section, the extending section is an inwardly concave arc structure, the two ends of the deforming section are respectively fixedly connected to the middle position of the inner wall of the supporting section and the extending section, the thickness of the deforming section gradually changes from thin to thick from the middle to the two ends; the outer wall of the supporting section is fixedly connected with a triangular block; the outer walls of several of the supporting sections are connected with rubber sleeve units.

[0014] Optionally, the rubber sleeve unit includes a rubber ring sleeved on the outer walls of several support segments, the rubber ring fits with one side of the triangular block, one side of the rubber ring is fixedly connected with several struts corresponding to the support segment, and the struts fit tightly with the outer wall of the support segment, one end of several struts is annularly fixed to the outer wall of the annular sheet, the struts are provided with connecting through holes corresponding to the connection positions of the fixed segment and the support segment, the connecting through holes are sealed with the elastic struts, and the outer walls of several struts are fixedly connected with sealing rubber sleeves; the inner wall of the water pipe perforation is fixedly connected with a water injection pipe, one end of the water injection pipe passes through the sealing extrusion groove and the annular sheet in sequence to extend to the interior of the elastic cage, and the other end is connected to the external pressurized structure.

[0015] Optionally, the cover device includes a cover sleeve rotatably connected to the sliding rod, the outer wall of the cover sleeve is fixedly connected with a cover connecting plate parallel to the detection base plate, and one side of the cover connecting plate is fixedly connected with a tank cover; the tank cover is formed by a first cover section and a second cover section fixedly connected, the first cover section is a semi-cylindrical structure with a rotation angle of 180°, and the second cover section is a semi-cylindrical structure with a rotation angle of 200°, and the end of the first cover section away from the cover sleeve is fixedly connected with a clamping plate, and the clamping plate is in contact with the top of the first support block.

[0016] The present application also provides a method for detecting a liquid hydrogen storage tank, comprising the following steps:

[0017] S1. When conducting a pressure test on a liquid hydrogen storage tank, first open the tank cover, and then place the liquid hydrogen storage tank on the tank support device;

[0018] S2. When placing the liquid hydrogen storage tank, the staff folds and pulls out the first turret unit, the second turret unit and the third turret unit, and then places the liquid hydrogen storage tank on the first turret unit and the second turret unit. After the placement is completed, the first turret unit, the second turret unit and the third turret unit are pushed back to the initial position;

[0019] S3, then the liquid hydrogen storage tank is sealed, and the sealing device is pushed by the telescopic rod to seal the tank mouth of the liquid hydrogen storage tank;

[0020] S4. After the sealing is completed, the external pressurization structure injects water into the liquid hydrogen storage tank through the water injection pipe so that the internal water pressure reaches the detection pressure, and the liquid hydrogen storage tank is pressure tested.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above scheme, by setting up a tank supporting device, the first turret unit, the second turret unit and the third turret unit cooperate with each other to support the liquid hydrogen storage tank. At the same time, when placing the liquid hydrogen storage tank, the first turret unit, the second turret unit and the third turret unit are folded and pulled out, so that it is convenient for the inspector to place the liquid hydrogen storage tank, avoiding the problem that the liquid hydrogen storage tank is inconvenient to place due to the small internal space of the detection chamber. The operation is simple and the operation time is saved.

[0023] By setting up a tank sealing device, the tank mouth of the liquid hydrogen storage tank is sealed and water is injected through the tank sealing device. The tank mouth of the liquid hydrogen storage tank can be quickly sealed through the tank sealing device, and the staff does not need to fix the flange seal by bolts, which is simple to operate.

[0024] By setting up a rubber sleeve unit, the rubber sleeve unit and the inner wall of the liquid hydrogen storage tank are fitted together. When the water injection inside the liquid hydrogen storage tank increases, the rubber sleeve unit is squeezed by the water pressure, and the inside of the liquid hydrogen storage tank is sealed for the second time through the rubber sleeve unit to assist in increasing the sealing effect. The greater the internal water pressure, the better the sealing effect of the rubber sleeve unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the liquid hydrogen storage tank detection device;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the tank supporting device in the first state;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the tank supporting device in the second state;

[0029] Figure 4 It is a schematic diagram of the multi-viewing stereoscopic structure of the first rotating frame unit;

[0030] Figure 5 It is a schematic diagram of the multi-viewing stereoscopic structure of the second rotating frame unit;

[0031] Figure 6 It is a schematic diagram of the multi-view stereoscopic structure of the third rotating frame unit;

[0032] Figure 7 It is a schematic diagram of the cutaway three-dimensional structure of the third rotating frame unit;

[0033] Figure 8 It is a schematic diagram of the three-dimensional structure of the detection base plate;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the can sealing device;

[0035] Fig.10 It is a schematic diagram of the cutaway three-dimensional structure of the can sealing device;

[0036] Fig.11 It is a schematic diagram of the three-dimensional structure of the rubber sleeve unit;

[0037] Fig.12 It is a schematic diagram of the three-dimensional structure of the elastic strut;

[0038] Fig.13 It is a schematic diagram of the three-dimensional structure of the cover device.

[0039] Reference numerals:

[0040] 1. Operation table; 2. Inspection table; 21. Limit plate; 22. Slide bar; 23. Telescopic rod; 24. Inspection chamber; 3. Inspection bottom plate; 31. First rotating slot; 311. Limit slot; 32. First sliding slot; 33. Second sliding slot; 34. Second rotating slot; 35. Third sliding slot; 4. Can sealing device; 41. Envelope; 411. First connecting rod; 412. Slide cylinder; 413. Second connecting rod; 414. First sliding slot seat; 415, water pipe perforation; 416, sealing extrusion groove; 417, annular groove; 42, rubber sleeve unit; 421, support rod; 422, sealing rubber sleeve; 423, rubber sleeve ring; 424, connecting perforation; 425, annular sheet; 43, elastic support bar; 431, fixed section; 432, supporting section; 433, extending section; 434, deformation section; 435, triangular block; 44, water injection pipe; 6, cover plate Device; 61, storage tank cover; 611, first cover section; 612, second cover section; 613, joint plate; 62, cover connecting plate; 63, cover rotating sleeve; 7, tank supporting device; 71, first rotating frame unit; 711, first support block; 712, base baffle; 713, third connecting rod; 714, second slide seat; 715, rotating column; 716, limiting slide plate; 717, annular rotating block; 72, second rotating frame Unit; 721, second support block; 722, first support base plate; 723, U-shaped connecting column; 724, fourth connecting rod; 725, fifth connecting rod; 726, third slide seat; 73, third rotating frame unit; 731, third support block; 732, retaining tank convex strip; 733, second support base plate; 734, sixth connecting rod; 735, turntable; 736, telescopic plate; 737, T-shaped slider; 738, telescopic slide groove.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0042] The following is a detailed description of a liquid hydrogen storage tank detection device and method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0043] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0044] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0045] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0046] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0047] like Figures 1 to 13As shown, an embodiment of the present invention provides a liquid hydrogen storage tank detection device, including an operating table 1, one side of the operating table 1 is fixedly connected to a detection table 2, the operating table 1 and the detection table 2 are prior art, the staff controls the detection of the liquid hydrogen storage tank through the operating table 1, the detection table 2 is used to detect the pressure resistance of the liquid hydrogen storage tank, the detection table 2 is provided with a detection cavity 24 inside, the detection cavity 24 is used to provide a detection space for the detection of the liquid hydrogen storage tank, the inner wall of the detection cavity 24 is fixedly connected to a slide bar 22, the slide bar 22 is an L-shaped structure, the detection cavity 24 is fixedly connected to a side of the operating table 1 The limit plate 21 is used to cooperate with the tank support device 7 to support the tank The device 7 is limited to prevent the tank supporting device 7 from deviating from the preset track during operation, and helps to increase the stability of the tank supporting device 7. The side of the detection chamber 24 away from the operating table 1 is fixedly connected with a telescopic rod 23, and the telescopic rod 23 is used to drive the tank sealing device 4 to perform telescopic movement. The tank sealing device 4 is controlled by the telescopic rod 23 to seal and release the tank mouth of the liquid hydrogen storage tank; the bottom of the detection chamber 24 is fixedly connected with a detection base plate 3 adapted to the bottom thereof, and the detection base plate 3 is used to provide an installation position for the tank supporting device 7; the tank supporting device 7 is located on the detection base plate 3, and the tank supporting device 7 is connected to the detection base plate 3, and the tank supporting device 7 is used to support the liquid hydrogen storage tank. At the same time, the liquid hydrogen storage tank is fixed by the cooperation of the tank support device 7 and the cover device 6 to prevent the liquid hydrogen storage tank from displacement, tilt or other unstable states during the test, thereby ensuring the safety and accuracy of the test and avoiding harm to personnel, equipment and the environment; the tank support device 7 includes a first rotating frame unit 71, a second rotating frame unit 72 and a third rotating frame unit 73 connected to the detection base plate 3, the first rotating frame unit 71 is connected to the second rotating frame unit 72, the second rotating frame unit 72 is connected to the third rotating frame unit 73, and the first rotating frame unit 71, the second rotating frame unit 72 and the third rotating frame unit 73 cooperate with each other to support the liquid hydrogen storage tank At the same time, when placing the liquid hydrogen storage tank, by folding and pulling out the first rotating frame unit 71, the second rotating frame unit 72 and the third rotating frame unit 73, it is convenient for the detection personnel to place the liquid hydrogen storage tank, avoiding the problem that the liquid hydrogen storage tank is inconvenient to place due to the small internal space of the detection chamber 24, and the operation is simple, saving the operation time; the tank sealing device 4 is located at the output end of the telescopic rod 23, and the tank sealing device 4 is connected to the output end of the telescopic rod 23. The tank sealing device 4 is used to seal and inject water into the tank mouth of the liquid hydrogen storage tank. The tank sealing device 4 can quickly seal the tank mouth of the liquid hydrogen storage tank; it also includes a cover device 6 for cooperating with the tank supporting device 7 to limit and fix the liquid hydrogen storage tank.

[0048] When the liquid hydrogen storage tank is pressure tested, the staff folds and pulls out the first rotating frame unit 71, the second rotating frame unit 72 and the third rotating frame unit 73. After the tank supporting device 7 is pulled out, the liquid hydrogen storage tank to be pressure tested is placed on the tank supporting device 7, and the tank supporting device 7 with the liquid hydrogen storage tank is pushed into the detection chamber 24 until the tank supporting device 7 returns to its initial position. Then the cover device 6 is rotated to fix the liquid hydrogen storage tank on the tank supporting device 7 through the cover device 6. After the liquid hydrogen storage tank is fixed, the telescopic rod 23 is controlled to drive the tank sealing device 4 to extend toward the tank mouth of the liquid hydrogen storage tank until the tank sealing device 4 seals the tank mouth of the liquid hydrogen storage tank. Then water is injected into the liquid hydrogen storage tank to make the internal water pressure reach the detection pressure, and the liquid hydrogen storage tank is pressure tested.

[0049] like Figures 2 to 8 As shown, the first rotating frame unit 71 includes a rotating column 715 rotatably connected to the detection base plate 3, and a first rotating groove 31 adapted to the rotating column 715 is provided at a position corresponding to the rotating column 715 on the top of the detection base plate 3, and the rotating column 715 is installed in the first rotating groove 31, and the rotating column 715 rotates in the first rotating groove 31, and an annular rotating block 717 is fixedly connected to the outer wall of the rotating column 715, and a limiting groove 311 adapted to the annular rotating block 717 is provided on the inner wall of the first rotating groove 31, and the annular rotating block 717 is used to limit the rotating column 715. At the same time, the rotation of the rotating column 715 in the first rotating groove 31 is more stable. The top of the rotating column 715 is fixedly connected with a first support block 711. The top of the first support block 711 is provided with a U-shaped tank body groove adapted to the outer diameter of the liquid hydrogen storage tank. The first support block 711 is used to support the bottom outer wall of the liquid hydrogen storage tank. One side of the first support block 711 is fixedly connected with a base baffle 712. The base baffle 712 is adapted to the bottom of the liquid hydrogen storage tank. The bottom of the liquid hydrogen storage tank is adapted and supported by the base baffle 712. The surface wall is fixedly connected to the limit slide 716 below the base baffle 712, and the limit slide 716 is slidably connected to the limit plate 21. An open groove with the same thickness as the limit slide 716 is opened on the limit plate 21, and the shape of the open groove is consistent with the shape of the limit plate 21. When the rotating column 715 rotates, the limit plate 21 slides in the open groove, and the rotation angle of the rotating column 715 is limited by the cooperation between the rotating column 715 and the limit plate 21, while increasing the stability of the rotation of the rotating column 715. The outer wall of the rotating column 715 and the limit slide A third connecting rod 713 is fixedly connected to the relative position 716, and a second slide 714 is fixedly connected to the bottom end of the third connecting rod 713. A first sliding groove 32 is provided at the top of the detection base plate 3 corresponding to the second slide 714. When the rotating column 715 rotates on the first rotating groove 31, the third connecting rod 713 drives the second slide 714 to slide on the first sliding groove 32. The rotation stability of the rotating column 715 is increased by the second slide 714 and the third connecting rod 713, and at the same time, it is connected to the second rotating frame unit 72 through the third connecting rod 713.

[0050] The second rotating frame unit 72 includes a fourth connecting rod 724 fixedly connected to the third connecting rod 713, the fourth connecting rod 724 is fixedly connected to the surface wall of the third connecting rod 713, the third connecting rod 713 and the fourth connecting rod 724 are located in the same vertical plane, one end of the fourth connecting rod 724 is fixedly connected to the first supporting bottom plate 722, the first supporting bottom plate 722 is used to provide a mounting position for the second support block 721 and support it, and the side of the first supporting bottom plate 722 away from the fourth connecting rod 724 is fixedly connected to a U-shaped connecting column 723, the U-shaped connecting column 723 is used to connect with the third rotating frame unit 73, the top of the first supporting base plate 722 is fixedly connected with the second supporting block 721, the second supporting block 721 is used to support the middle outer wall of the liquid hydrogen storage tank, the bottom of the first supporting base plate 722 is fixedly connected with the fifth connecting rod 725, the bottom end of the fifth connecting rod 725 is fixedly connected with the third slide seat 726, the top of the detection base plate 3 and the third slide seat 726 The corresponding position is provided with a second slide groove 33, and the top of the second supporting block 721 is provided with an arc-shaped tank body groove adapted to the outer diameter of the liquid hydrogen storage tank.

[0051] When the third connecting rod 713 drives the second slide 714 to slide on the first slide groove 32, the third connecting rod 713 will drive the fourth connecting rod 724 fixedly connected thereto to rotate, thereby driving the third slide 726 on the fifth connecting rod 725 to slide adaptively on the second slide groove 33 through the fourth connecting rod 724, so that the second rotating frame unit 72 always rotates with the rotation of the first rotating frame unit 71, so that the two are always located in the same vertical plane during the rotation process.

[0052] The third rotating frame unit 73 includes a second supporting bottom plate 733 located above the detection bottom plate 3, the second supporting bottom plate 733 is used to provide an installation position for the third support block 731 and support it, the bottom of the second supporting bottom plate 733 is fixedly connected to the sixth connecting rod 734, the bottom end of the sixth connecting rod 734 is fixedly connected to the rotating disk 735, and the top of the detection bottom plate 3 is provided with a second rotating groove 34 adapted thereto at a position corresponding to the rotating disk 735. The second supporting bottom plate 733 can be connected to the detection bottom plate 3 through the sixth connecting rod 734 and the rotating disk 735. The second rotating groove 34 rotates, and the top of the second supporting bottom plate 733 is fixedly connected with a third support block 731, and the third support block 731 is used to support the front end outer wall of the liquid hydrogen storage tank. The shape of the third support block 731 is consistent with the shape of the second support block 721. The third support block 731 is fixedly connected with a tank retaining convex strip 732 on the top, and inner grooves are provided on both sides of the tank retaining convex strip 732. The inner grooves are adapted to the surface wall of the liquid hydrogen storage tank. The front end of the liquid hydrogen storage tank can be positioned by the tank retaining convex strip 732 to avoid the liquid hydrogen storage tank being placed The second support bottom plate 733 is provided with a telescopic slide groove 738 at one end facing the U-shaped connecting column 723, and the telescopic slide groove 738 provides a sliding track for the telescopic plate 736. T-shaped grooves are provided on both sides of the inner wall of the telescopic slide groove 738, and a telescopic plate 736 is slidably connected to the telescopic slide groove 738, and the telescopic plate 736 is used to connect with the U-shaped connecting column 723. , and slide in the telescopic slide groove 738 at the same time. T-shaped sliding blocks 737 adapted to the T-shaped slot are provided on both sides of the telescopic plate 736. The telescopic plate 736 and the second supporting bottom plate 733 are slidably connected through the T-shaped sliding blocks 737 and the T-shaped slots. One end of the telescopic plate 736 is rotatably connected to the U-shaped connecting column 723; the first support block 711, the second support block 721 and the third support block 731 are located at the same horizontal height, and in the initial state, the first support block 711, the second support block 721 and the third support block 731 are distributed in a straight line.

[0053] When the fourth connecting rod 724 drives the third slide seat 726 on the fifth connecting rod 725 to slide on the second slide groove 33, the U-shaped connecting column 723 will pull the telescopic plate 736 rotatably connected thereto when it rotates. As the U-shaped connecting column 723 rotates, the telescopic plate 736 will be pulled out of the telescopic slide groove 738, and the sixth connecting rod 734 and the turntable 735 fixed on the second supporting base plate 733 will be driven to rotate through the telescopic plate 736.

[0054] like Figure 3 , Fig. 9 and Fig.10As shown, the can-sealing device 4 includes a sealing sleeve 41 fixedly connected to the output end of the telescopic rod 23. One end of the sealing sleeve 41 away from the telescopic rod 23 is provided with a sealing extrusion groove 416. One side of the sealing sleeve 41 close to the sealing extrusion groove 416 is an outwardly turned arc structure, which is convenient for sleeving the sealing extrusion groove 416 onto the mouth of the liquid hydrogen storage tank. A water pipe through hole 415 penetrating both ends is provided at the central position of the sealing sleeve 41. The water pipe through hole 415 is used for fixedly installing a water injection pipe 44. A plurality of uniformly distributed annular grooves 417 are provided on one side of the sealing extrusion groove 416. When the sealing extrusion groove 416 is pressed and sealed with the mouth of the liquid hydrogen storage tank, the plurality of annular grooves 417 can form a plurality of annular sealed openings with the mouth of the tank, which can increase the sealing effect. The outer wall of the sealing sleeve 41 is fixedly connected with a second connecting rod 413. The bottom end of the second connecting rod 413 is fixedly connected with a first sliding seat 414. Through the cooperation of the second connecting rod 413 and the first sliding seat 414 with the first connecting rod 411 and the sliding cylinder 412, when the telescopic rod 23 pushes the sealing sleeve 41, the sealing sleeve 41 is more stable during displacement and will not deviate. One side of the sealing extrusion groove 416 is connected with an elastic support strip 43. The outer wall of the sealing sleeve 41 is fixedly connected with a first connecting rod 411 perpendicular to the second connecting rod 413. One end of the first connecting rod 411 is fixedly connected with a sliding cylinder 412. The sliding cylinder 412 is sleeved on the outer wall of the sliding rod 22. At the position corresponding to the first sliding seat 414 on the top of the detection bottom plate 3, a third sliding groove 35 adapted thereto is provided.

[0055] When it is necessary to seal the mouth of the liquid hydrogen storage tank, the telescopic rod 23 pushes the sealing sleeve 41, so that the first sliding seat 414 on the sealing sleeve 41 slides on the third sliding groove 35, and the sliding cylinder 412 on the sealing sleeve 41 slides on the sliding rod 22. During the sliding of the sealing sleeve 41, the sealing extrusion groove 416 is aligned with the mouth of the liquid hydrogen storage tank until the bottom of the sealing extrusion groove 416 abuts against the mouth of the liquid hydrogen storage tank, thereby sealing the mouth of the liquid hydrogen storage tank.

[0056] As Figures 9 to 12As shown, the elastic cage is composed of a plurality of elastic stays 43 uniformly distributed in a ring shape; the elastic stay 43 is connected by a fixed section 431, a supporting section 432, an extension section 433 and a deformation section 434. The fixed section 431 is a strip structure, and the fixed section 431 is used to fix the entire elastic stay 43 to the sealing extrusion groove 416. The two ends of the fixed section 431 are respectively fixed to the inner wall of the sealing extrusion groove 416 and one end of the supporting section 432. The supporting section 432 is a convex structure. When the supporting section 432 is in an initial state, its shape is adapted to the inner wall of the tank mouth of the liquid hydrogen storage tank. The end of the supporting section 432 away from the fixed section 431 is fixedly connected with the extension section 433. The extension section 433 facilitates the entire elastic cage to enter the interior of the liquid hydrogen storage tank under the extrusion of the telescopic rod 23. The extension section 433 is concave. The arc-shaped structure has two ends of the deformation section 434 fixedly connected to the middle position of the inner wall of the support section 432 and the extension section 433 respectively. When the elastic strut 43 is squeezed into the interior of the liquid hydrogen storage tank, the deformation section 434 is used to quickly support the support section 432 to restore the deformation, thereby squeezing the rubber sleeve unit 42 on the support section 432 to fit the inner wall of the liquid hydrogen storage tank, and the thickness of the deformation section 434 gradually changes from thin to thick from the middle to the two ends; the outer wall of the support section 432 is fixedly connected with a triangular block 435; the outer walls of several support sections 432 are connected with rubber sleeve units 42, and the rubber sleeve units 42 are used to fit each other with the inner wall of the liquid hydrogen storage tank. When the water injection inside the liquid hydrogen storage tank increases, the rubber sleeve unit 42 is squeezed by water pressure, and the inside of the liquid hydrogen storage tank is secondary sealed by the rubber sleeve unit 42 to assist in increasing the sealing effect.

[0057] The rubber sleeve unit 42 includes a rubber sleeve 423 sleeved on the outer wall of a plurality of support sections 432, the rubber sleeve 423 fits with one side of the triangular block 435, and one side of the rubber sleeve 423 is fixedly connected with a plurality of struts 421 corresponding to the support section 432, and the struts 421 fit closely with the outer wall of the support section 432, one end of the plurality of struts 421 is annularly fixed on the outer wall of the annular sheet 425, and the struts 421 are provided with connecting through holes 424 corresponding to the connecting positions of the fixing section 431 and the support section 432, the connecting through holes 424 are sealedly connected with the elastic struts 43, and the outer walls of the plurality of struts 421 are fixedly connected with the sealing rubber sleeves 422; the inner wall of the water pipe through hole 415 is fixedly connected with the water injection pipe 44, one end of the water injection pipe 44 passes through the sealing extrusion groove 416 and the annular sheet 425 in sequence and extends to the inside of the elastic cage, and the other end is connected to the external pressurized structure.

[0058] When the telescopic rod 23 pushes the envelope 41 to move, the insertion section 433 of the elastic cage extends into the mouth of the liquid hydrogen storage tank. With the continuous squeezing of the telescopic rod 23, the support section 432 contacts the mouth of the liquid hydrogen storage tank, and is squeezed and deformed. When the support section 432 is deformed, it drives the strut 421 fixedly connected thereto to be compressed and deformed. By driving the strut 421 to deform, the sealing rubber sleeve 422 is compressed and deformed until the entire elastic strut 43 and the rubber sleeve unit 42 enter the liquid hydrogen storage tank. After the elastic strut 43 entering the liquid hydrogen storage tank is free from the squeezing force of the mouth of the liquid hydrogen storage tank, the deformation section 434 drives the support section 432 to restore its deformation, and then drives the sealing rubber sleeve 422 to expand and fit the inner wall of the liquid hydrogen storage tank through the strut 421.

[0059] like Figure 3 , Figure 4 and Fig.13 As shown, the cover device 6 includes a cover sleeve 63 rotatably connected to the slide bar 22, the cover sleeve 63 is used to drive the tank cover 61 to rotate on the slide bar 22, the outer wall of the cover sleeve 63 is fixedly connected with a cover connecting plate 62 parallel to the detection base plate 3, and one side of the cover connecting plate 62 is fixedly connected with the tank cover 61; the tank cover 61 is formed by a first cover section 611 and a second cover section 612 fixedly connected, the first cover section 611 is a semi-cylindrical structure with a rotation angle of 180°, and the second cover section 612 is a semi-cylindrical structure with a rotation angle of 200°, and the end of the first cover section 611 away from the cover sleeve 63 is fixedly connected with a clamping plate 613, the clamping plate 613 and the top of the first support block 711 are fitted together, and the clamping plate 613 and the surface of the first support block 711 are fixed by bolts, thereby limiting and fixing the liquid hydrogen storage tank.

[0060] The present application also provides a method for detecting a liquid hydrogen storage tank, comprising the following steps:

[0061] S1. When performing a pressure test on a liquid hydrogen storage tank, first open the storage tank cover 61, and then place the liquid hydrogen storage tank on the tank support device 7;

[0062] S2. When placing the liquid hydrogen storage tank, the staff folds and pulls out the first turret unit 71, the second turret unit 72 and the third turret unit 73, and then places the liquid hydrogen storage tank on the first turret unit 71 and the second turret unit 72. After the placement is completed, the first turret unit 71, the second turret unit 72 and the third turret unit 73 are pushed back to the initial position;

[0063] S3, then the liquid hydrogen storage tank is sealed, and the sealing device 4 is pushed by the telescopic rod 23 to seal the tank mouth of the liquid hydrogen storage tank;

[0064] S4. After the sealing is completed, the external pressurizing structure injects water into the liquid hydrogen storage tank through the water injection pipe 44, so that the internal water pressure reaches the detection pressure, and the pressure of the liquid hydrogen storage tank is tested.

[0065] The working principle of the technical solution provided by the present invention is as follows: when performing a pressure test on a liquid hydrogen storage tank, the tank cover 61 is first opened, and then the liquid hydrogen storage tank is placed. When placing the liquid hydrogen storage tank, the staff folds and pulls out the first rotating rack unit 71, the second rotating rack unit 72 and the third rotating rack unit 73.

[0066] When the third link 713 drives the second slide seat 714 to slide on the first slide slot 32, the third link 713 will drive the fourth link 724 fixedly connected thereto to rotate, thereby driving the third slide seat 726 on the fifth link 725 to slide on the second slide slot 33 through the fourth link 724, so that the second rotating frame unit 72 always rotates with the rotation of the first rotating frame unit 71. At the same time, when the fourth link 724 drives the third slide seat 726 on the fifth link 725 to slide on the second slide slot 33, the U-shaped connecting post 723 will pull the telescopic plate 736 rotatably connected thereto when it rotates. 6 is pulled out from the telescopic slide groove 738, while the sixth connecting rod 734 and the turntable 735 fixed on the second supporting bottom plate 733 are driven to rotate through the telescopic plate 736, so that the first rotating frame unit 71, the second rotating frame unit 72 and the third rotating frame unit 73 are pulled out in a triangular shape, and then the liquid hydrogen storage tank is placed on the first support block 711 and the second support block 721, and finally the second support block 721 is pushed to make the first rotating frame unit 71, the second rotating frame unit 72 and the third rotating frame unit 73 return to their initial positions. At this time, the liquid hydrogen storage tank is pushed into the detection cavity 24, and at the same time, the front end of the liquid hydrogen storage tank is pushed again, so that the liquid hydrogen storage tank is pushed over the tank blocking convex strip 732, and the outer wall of the liquid hydrogen storage tank is blocked by the tank blocking convex strip 732, and then the cover device 6 is rotated to fix the liquid hydrogen storage tank on the tank support device 7 through the cover device 6.

[0067] Then the liquid hydrogen storage tank is sealed, the telescopic rod 23 pushes the cover 41, so that the first slide seat 414 on the cover 41 slides on the third slide groove 35, and the slide cylinder 412 on the cover 41 slides on the slide rod 22. When the cover 41 slides, the sealing extrusion groove 416 is aligned with the tank opening of the liquid hydrogen storage tank until the base of the sealing extrusion groove 416 is against the tank opening of the liquid hydrogen storage tank, thereby sealing the tank opening of the liquid hydrogen storage tank. At the same time, when the telescopic rod 23 pushes the cover 41 to move, the extension section 433 of the elastic cage extends into the tank opening of the liquid hydrogen storage tank. With the continuous extrusion of the telescopic rod 23, the support Segment 432 contacts the mouth of the liquid hydrogen storage tank and is squeezed and deformed. When the supporting segment 432 is deformed, it drives the support rod 421 fixed thereto to be compressed and deformed. By driving the support rod 421 to deform, the sealing rubber sleeve 422 is compressed and deformed until the entire elastic support bar 43 and the rubber sleeve unit 42 enter the liquid hydrogen storage tank. After the elastic support bar 43 entering the liquid hydrogen storage tank is free from the squeezing force of the mouth of the liquid hydrogen storage tank, the deformed segment 434 drives the supporting segment 432 to restore its deformation, and then drives the sealing rubber sleeve 422 to expand through the support rod 421 to fit the inner wall of the liquid hydrogen storage tank for secondary sealing.

[0068] After the sealing is completed, the external pressurization structure injects water into the liquid hydrogen storage tank through the water injection pipe 44 so that the internal water pressure reaches the detection pressure, and the pressure of the liquid hydrogen storage tank is tested.

[0069] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A liquid hydrogen storage tank detection device, characterized in that: It comprises an operating table, one side of which is fixedly connected to a detection table, a detection cavity is provided inside the detection table, a sliding rod is fixedly connected to the inner wall of the detection cavity, a side of the detection cavity close to the operating table is fixedly connected to a limit plate, and a side of the detection cavity away from the operating table is fixedly connected to a telescopic rod; The bottom of the detection cavity is fixedly connected with a detection bottom plate adapted to the bottom thereof; A tank supporting device, located on the detection bottom plate, connected to the detection bottom plate, and used to support the liquid hydrogen storage tank; The can supporting device comprises a first rotating rack unit, a second rotating rack unit and a third rotating rack unit connected to the detection bottom plate, the first rotating rack unit is connected to the second rotating rack unit, and the second rotating rack unit is connected to the third rotating rack unit; A tank sealing device, located at the output end of the telescopic rod, connected to the output end of the telescopic rod, and used to seal and inject water into the tank opening of the liquid hydrogen storage tank; The can sealing device comprises a sealing sleeve fixedly connected to the output end of the telescopic rod, an end of the sealing sleeve away from the telescopic rod is provided with a sealing extrusion groove, and one side of the sealing extrusion groove is connected to an elastic support bar; The elastic stay is connected by a fixed section, a supporting section, an extending section and a deforming section. The fixed section is a strip-shaped structure. The two ends of the fixed section are respectively fixed to the inner wall of the sealing extrusion groove and one end of the supporting section. The end of the supporting section away from the fixed section is fixedly connected to the extending section. The two ends of the deforming section are respectively fixedly connected to the middle position of the inner wall of the supporting section and the extending section. The outer wall of the supporting section is fixedly connected to a triangular block, and the outer walls of several supporting sections are connected to rubber sleeve units. The rubber sleeve unit comprises a rubber sleeve ring sleeved on the outer wall of several supporting segments, the rubber sleeve ring fits with one side of the triangular block, one side of the rubber sleeve ring is fixedly connected with several struts corresponding to the supporting segments, and the struts fit tightly with the outer wall of the supporting segments, one end of several struts is annularly fixed on the outer wall of the annular sheet, the struts are provided with connecting through holes corresponding to the connecting positions of the fixing segments and the supporting segments, the connecting through holes are sealed with the elastic struts, and the outer walls of several struts are fixedly connected with sealing rubber sleeves; It also includes a cover plate device for cooperating with the tank supporting device to limit and fix the liquid hydrogen storage tank.

2. The liquid hydrogen storage tank detection device according to claim 1, characterized in that: The first rotating frame unit includes a rotating column rotatably connected to the detection base plate, the outer wall of the rotating column is fixedly connected to a ring-shaped rotating block, the top of the rotating column is fixedly connected to a first support block, one side of the first support block is fixedly connected to a base baffle, the outer wall of the rotating column is fixedly connected to a limiting slide below the base baffle, the outer wall of the rotating column is fixedly connected to a third connecting rod at a relative position between the outer wall of the rotating column and the limiting slide, the bottom end of the third connecting rod is fixedly connected to a second slide seat, the top of the first support block is provided with a U-shaped tank groove adapted to the outer diameter of the liquid hydrogen storage tank, and the limiting slide is slidably connected to the limiting plate.

3. The liquid hydrogen storage tank detection device according to claim 2, characterized in that: The second rotating frame unit includes a fourth connecting rod fixedly connected to the third connecting rod, one end of the fourth connecting rod is fixedly connected to the first supporting base plate, the side of the first supporting base plate away from the fourth connecting rod is fixedly connected to a U-shaped connecting column, the top of the first supporting base plate is fixedly connected to a second support block, the bottom of the first supporting base plate is fixedly connected to a fifth connecting rod, the bottom end of the fifth connecting rod is fixedly connected to a third slide seat, and the top of the second support block is provided with an arc-shaped tank groove adapted to the outer diameter of the liquid hydrogen storage tank.

4. The liquid hydrogen storage tank detection device according to claim 3, characterized in that: The third rotating frame unit comprises a second supporting bottom plate located above the detection bottom plate, a sixth connecting rod is fixedly connected to the bottom of the second supporting bottom plate, a rotating disk is fixedly connected to the bottom end of the sixth connecting rod, a third supporting block is fixedly connected to the top of the second supporting bottom plate, the shape of the third supporting block is consistent with the shape of the second supporting block, and a retaining tank convex strip is fixedly connected to the top of the third supporting block; A telescopic slot is provided at one end of the second supporting bottom plate facing the U-shaped connecting column, T-slots are provided on both sides of the inner wall of the telescopic slot, a telescopic plate is slidably connected to the telescopic slot, T-slide blocks matching the T-slot are provided on both sides of the telescopic plate, the telescopic plate and the second supporting bottom plate are slidably connected through the T-slide blocks and the T-slots, and one end of the telescopic plate is rotatably connected to the U-shaped connecting column; The first supporting block, the second supporting block and the third supporting block are located at the same horizontal height, and in an initial state, the first supporting block, the second supporting block and the third supporting block are distributed in a straight line.

5. The liquid hydrogen storage tank detection device according to claim 4, characterized in that: A first rotating groove adapted to the rotating column is provided at a position corresponding to the top of the detection base plate, a limiting groove adapted to the annular rotating block is provided on an inner wall of the first rotating groove, a first sliding groove is provided at a position corresponding to the second sliding seat of the top of the detection base plate, a second sliding groove is provided at a position corresponding to the third sliding seat of the top of the detection base plate, and a second rotating groove adapted to the rotating disk is provided at a position corresponding to the top of the detection base plate.

6. The liquid hydrogen storage tank detection device according to claim 5, characterized in that: A water pipe through hole is provided at the center of the sleeve and passes through both ends; a plurality of evenly distributed annular grooves are provided on one side of the sealing extrusion groove; a second connecting rod is fixedly connected to the outer wall of the sleeve; a first sliding seat is fixedly connected to the bottom end of the second connecting rod; a first connecting rod perpendicular to the second connecting rod is fixedly connected to the outer wall of the sleeve; a sliding cylinder is fixedly connected to one end of the first connecting rod; and the sliding cylinder is sleeved on the outer wall of the sliding rod; A third sliding groove matching with the first sliding seat is provided at a position on the top of the detection bottom plate corresponding to the first sliding seat.

7. The liquid hydrogen storage tank detection device according to claim 6, characterized in that: A plurality of elastic stays evenly distributed in a ring shape form an elastic cage; the support section is an outwardly convex structure, the extending section is an inwardly concave arc structure, and the thickness of the deformation section gradually changes from thin to thick from the middle to both ends.

8. The liquid hydrogen storage tank detection device according to claim 7, characterized in that: The inner surface wall of the water pipe perforation is fixedly connected with a water injection pipe, one end of which passes through the sealing extrusion groove and the annular sheet in sequence and extends to the inside of the elastic cage, and the other end is connected to the external pressurizing structure.

9. The liquid hydrogen storage tank detection device according to claim 8, characterized in that: The cover plate device comprises a cover plate rotating sleeve rotatably connected to the slide rod, the outer surface wall of the cover plate rotating sleeve is fixedly connected with a cover plate connecting plate parallel to the detection bottom plate, and one side of the cover plate connecting plate is fixedly connected with a storage tank cover plate; The tank cover is formed by a first cover section and a second cover section fixedly connected, the first cover section is a semi-cylindrical structure with a rotation angle of 180°, the second cover section is a semi-cylindrical structure with a rotation angle of 200°, and one end of the first cover section away from the cover sleeve is fixedly connected with a clamping plate, and the clamping plate is in contact with the top of the first support block.

10. The method of the liquid hydrogen storage tank detection device according to claim 9, characterized in that: The following steps are involved: S1. When conducting a pressure test on a liquid hydrogen storage tank, first open the tank cover, and then place the liquid hydrogen storage tank on the tank support device; S2. When placing the liquid hydrogen storage tank, the staff folds and pulls out the first turret unit, the second turret unit and the third turret unit, and then places the liquid hydrogen storage tank on the first turret unit and the second turret unit. After the placement is completed, the first turret unit, the second turret unit and the third turret unit are pushed back to the initial position; S3, then the liquid hydrogen storage tank is sealed, and the sealing device is pushed by the telescopic rod to seal the tank mouth of the liquid hydrogen storage tank; S4. After the sealing is completed, the external pressurization structure injects water into the liquid hydrogen storage tank through the water injection pipe so that the internal water pressure reaches the detection pressure, and the liquid hydrogen storage tank is pressure tested.

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