Hydrogen storage tank testing device

Abstract

The utility model relates to a hydrogen storage tank testing device which comprises a bottom frame, a clamping part used for supporting and clamping a tank body is arranged in the middle of the bottom frame, and a polishing part is arranged on one side of the bottom frame. The clamping part comprises a lead screw, nuts and arc-shaped supports, a left-handed thread and a right-handed thread are formed on the lead screw, each thread is provided with one nut, when the lead screw rotates, the two nuts move relatively, each nut is provided with one arc-shaped support, and the outer side of each arc-shaped support is provided with one elastic push plate; according to the utility model, the two nuts are driven to move relatively through the two sections of threads with opposite rotation directions on the lead screw, the arc-shaped support is driven to clamp or loosen a tank synchronously, the tank is automatically positioned in the center of the device, and a polishing part can accurately correspond to a test point; the driving component drives the tank body to rotate, multi-area automatic polishing of the surface of the tank body is achieved in combination with the polishing component, and the pretreatment efficiency of the large hydrogen storage tank is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage tank processing technology, and in particular to a hydrogen storage tank testing device. Background Technology

[0002] Hydrogen storage tanks are critical equipment for the safe storage of high-pressure hydrogen, typically constructed from high-strength composite materials such as carbon fiber reinforced polymers or a metal inner liner with an outer winding layer. Their core function is to stably store hydrogen under high pressure, while also possessing excellent fatigue resistance, impact resistance, and corrosion resistance to meet the application requirements of hydrogen fuel cell vehicles, stationary hydrogen storage systems, and other fields. During the production and use of hydrogen storage tanks, stress testing is a crucial method for assessing their structural integrity and safety. By analyzing the stress distribution on the surface or inside the tank, potential defects such as cracks, deformation, or material fatigue can be effectively identified, ensuring long-term operational reliability.

[0003] Currently, the conventional method for stress testing of hydrogen storage tanks involves selecting several test points on the tank surface, removing the paint layer and surface impurities through grinding or polishing, and then attaching strain gauges to collect stress data. However, this pretreatment process has significant limitations: while manual grinding is feasible for small hydrogen storage tanks, it is less effective for large tanks such as vehicle-mounted or industrial-grade tanks. The test points are widely distributed and spaced apart, requiring operators to frequently move or adjust the tank's orientation, resulting in low efficiency and high labor intensity. Utility Model Content

[0004] To overcome the drawbacks of inconvenient grinding and low operating efficiency of large curved tanks, this utility model provides a hydrogen storage tank testing device.

[0005] The technical solution of this utility model is: a hydrogen storage tank testing device, including a base frame, a clamping component for supporting and holding the tank body is provided in the middle of the base frame, and a grinding component is provided on one side of the base frame; the clamping component includes a lead screw, a nut and an arc-shaped support, the lead screw has two sections of threads, one left-handed and one right-handed, and a nut is provided on each section of thread. When the lead screw rotates, the two nuts move relative to each other, and an arc-shaped support is provided on each nut. An elastic push plate is provided on the outer side of each arc-shaped support; it also includes a driving component for driving the tank body to rotate.

[0006] Furthermore, the elastic push plate includes a push plate body, a movable shaft, and a support arm. One end of the support arm is connected to an arc-shaped support, and the other end is provided with a spline sleeve. One end of the movable shaft is rotatably connected to the push plate body, and the other end is provided with a spline and slidably connected to the spline sleeve. The end of the movable shaft away from the push plate body is provided with an anti-detachment baffle. A spring I and a sandwich gasket are sleeved on the movable shaft. One end of the spring I abuts against the spline sleeve, and the other end abuts against the sandwich gasket. The sandwich gasket is in close contact with the push plate body.

[0007] Furthermore, an angle sensor is provided on the side of the push plate body away from the interlayer gasket. The housing of the angle sensor is connected to the push plate body, and the measuring end is connected to the movable shaft.

[0008] Furthermore, a pressure sensor is provided within the interlayer of the interlayer gasket.

[0009] Furthermore, the driving component includes a plurality of rollers arranged circumferentially along the inner ring of the arc-shaped support, and a geared motor for driving the rollers to rotate.

[0010] Furthermore, the grinding component includes a linear slide table, a column is provided at the movable end of the linear slide table, a mounting plate is provided at the upper end of the column, a vertical rail and a cylinder are provided on the mounting plate, a slider I is provided on the vertical rail, a slide plate is provided on the slider I, a grinding machine is provided on the slide plate, and the cylinder is vertically arranged with its extension rod connected to the slide plate.

[0011] Furthermore, the slide plate is also provided with a limiting part, which includes an ear plate, a stop ring, a vertical slide rod, a spring II, and a limit switch. The stop ring is coaxially arranged with the grinding head of the grinding machine. At least two spaced vertical slide rods are provided at the upper end of the stop ring. The vertical slide rods are slidably connected to the slide plate through the ear plate. The upper end of the vertical slide rod is provided with a stop joint. The spring II is sleeved on the vertical slide rod and is located between the stop joint and the ear plate. The limit switch has a receiving end and a sensing end. Its receiving end is set on the slide plate, and its sensing end is set on the vertical slide rod. When the spring II is in the relaxed state, the stop ring is slightly lower than the height of the grinding head in the vertical direction.

[0012] Furthermore, it also includes a position sensor, comprising a transmitter and multiple receivers; the transmitter is mounted on the column; the receivers are respectively mounted on the two arc-shaped supports and at the midpoint of the two arc-shaped supports.

[0013] The beneficial effects are: 1. This utility model drives two nuts to move relative to each other through two sections of screw with opposite directions of rotation on the lead screw, which drives the arc support to clamp or loosen the tank at the same time, so that the tank is automatically positioned in the center of the device, ensuring that the grinding component can accurately correspond to the test point; the driving component drives the tank to rotate, and in combination with the grinding component, realizes automated grinding of multiple areas on the surface of the tank, improving the pretreatment efficiency of large hydrogen storage tanks.

[0014] 2. The elastic push plate of this utility model is slidably connected to the spline sleeve through the movable shaft. Combined with the elastic buffering effect of spring I, the push plate body adapts to the slight deformation of the can surface during the clamping process, avoiding damage to the can caused by rigid clamping. The cooperation between the interlayer gasket and spring I further disperses the clamping pressure and protects the integrity of the coating on the can surface.

[0015] In addition, by embedding a pressure sensor in the interlayer gasket to monitor the clamping force value in real time, the clamping action is automatically paused when the clamping force reaches a preset threshold, preventing excessive pressure from causing deformation of the tank structure or damage to the internal materials. At the same time, it provides adjustable clamping force parameters for hydrogen storage tanks of different materials.

[0016] 3. This device uses an angle sensor to detect the rotation angle of the pusher plate body in real time. When the tank rotates to a set angle, such as 90°, a signal is triggered to control the drive component to stop rotating and start the grinding operation, ensuring that the circumferential test points of the tank are evenly spaced and avoiding grinding position deviations caused by human visual inspection errors.

[0017] 4. The driving components of this device are evenly arranged along the inner circumference of the arc-shaped support via multiple rollers, driving the tank to rotate smoothly.

[0018] 5. The grinding component of this utility model drives the column to move axially along the tank body via a linear slide, and the height of the grinding head is adjusted up and down by a cylinder-driven sliding plate.

[0019] In addition, the limiting part, through the elastic support of spring II, keeps the abutment ring in slight contact with the surface of the tank. When the grinding head is pressed down too much, the vertical slide rod triggers the limit switch to automatically stop grinding, preventing the protective layer from being damaged due to excessive pressure. The coaxial design of the abutment ring and the grinding head further ensures the uniformity of the grinding depth.

[0020] 6. This utility model accurately locates the test area on the axial midpoint of the tank and the symmetrical sides by matching the signals of the transmitter and receiver of the position sensor. Combined with the automatic movement of the linear slide, it realizes the rapid switching of multiple grinding points, reduces the time cost of manual marking and measurement, and improves the work efficiency in large-scale testing scenarios. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the elastic push plate and driving component of this utility model.

[0023] Figure 3 This is a schematic diagram of the elastic push plate of this utility model.

[0024] Figure 4 This is a partial structural schematic diagram of the present invention.

[0025] Figure 5 This is a partial structural diagram of the grinding component of this utility model.

[0026] In the attached diagram, the following labels are used: 1-base frame, 2-clamping component, 201-lead screw, 201a-left-hand thread, 201b-right-hand thread, 202-nut, 203-servo motor, 204-arc support, 205-elastic push plate, 205a-push plate body, 205b-moving shaft, 205c-support arm, 205d-spline sleeve, 205e-spring I, 205f-layer gasket, 207-angle sensor, 3-grinding component, 301-linear slide. 302-Column, 303-Vertical rail, 304-Cylinder, 305-Slide plate, 306-Slider I, 307-Grinding machine, 308-Limiting part, 308a-Abutting ring, 308b-Vertical slide bar, 308c-Spring II, 308d-Ear plate, 308e-Limit switch, 309-Position sensor, 309a-Transmitter, 309b-Receiver, 4-Drive component, 401-Roller, 402-Gear motor, 5-Slide rail II, 51-Slider II. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1 The hydrogen storage tank testing device shown includes a base frame 1, a clamping component 2 in the middle of the base frame 1, and a grinding component 3 installed on the right side of the base frame 1. The clamping component 2 achieves the rotation and positioning of the tank through the driving component 4, and works with the grinding component 3 to grind the test points.

[0029] like Figure 1-3As shown, the clamping component 2 specifically includes a horizontally arranged lead screw 201. The two ends of the lead screw 201 are respectively machined with left-hand threads 201a and right-hand threads 201b. A nut 202 is installed on each thread segment, and an arc-shaped support 204 is provided on each nut 202. The lead screw 201 is driven to rotate by a servo motor 203. The two nuts 202 move in opposite directions as the lead screw 201 rotates, with a preferred moving speed between 5-10 mm / s. This causes the arc-shaped supports 204 on both sides to move synchronously closer or further away, achieving automatic centering and clamping of the tank. Each outer side of the arc-shaped support 204 is equipped with an elastic push plate 205. The elastic push plate 205 includes a push plate body 205a, a movable shaft 205b, and a support arm 205c. One end of the support arm 205c is welded to the arc-shaped support 204, and the other end is slidably connected to the movable shaft 205b through a spline sleeve 205d. The end of the movable shaft 205b away from the push plate body 205a is provided with an anti-detachment baffle. A spring I 205e and a sandwich gasket 205f are sleeved on the movable shaft 205b. The spring I 205e is used to buffer the deformation impact of the tank during clamping. A pressure sensor is embedded inside the sandwich gasket 205f to monitor the clamping force in real time. When the pressure is within a preset value, it triggers the PLC to control the servo motor 203 to stop. An angle sensor 207 is installed on the back of the push plate body 205a. Its measuring end is connected to the movable shaft 205b through a coupling to detect the rotation angle of the tank. For example, a grinding action is triggered every 90° rotation. In addition, an anti-slip sleeve is provided on the side of the pusher plate body 205a that contacts the tank.

[0030] refer to Figure 2 The driving component 4 includes four rubber rollers 40 arranged circumferentially along the inner ring of the arc-shaped support 204. The rollers 401 are driven to rotate by a reduction motor 402. The surface of the rollers 401 contacts the tank body, and the tank body is rotated by friction. Specifically, a helical gear is respectively provided on the shaft of one of the rollers 401 and the shaft of the reduction motor 402. The two helical gears mesh. Preferably, adjacent rollers 401 are connected by a sprocket-chain transmission (not shown in the figure). To further ensure the stability of the arc-shaped support 204, two sets of parallel slide rails II5 are provided on the base frame 1. Slider II51 is provided on each slide rail II5. The slider II51 is connected to the arc-shaped support 204 and is used to support the arc-shaped support 204.

[0031] refer to Figure 4 and Figure 5The grinding component 3 includes a linear slide 301, with a fixed column 302 at the movable end of the linear slide 301. A vertical rail 303 and a cylinder 304 are mounted on the top of the column 302 via a mounting plate. The slide plate 305 slides on the vertical rail 303 via a slider I 306. The grinding machine 307 is mounted on the slide plate 305. The telescopic rod of the cylinder 304 is connected to the slide plate 305, driving the grinding machine 307 to move up and down. The slide plate 305 is provided with a limiting part 308, which includes an abutment ring 308a, two vertical sliding rods 308b, and a spring II 308c. The abutment ring 308a is coaxially installed with the grinding head of the grinder 307. The vertical sliding rods 308b are slidably connected to the slide plate 305 through the ear plate 308d. The upper end of the vertical sliding rod 308b is provided with an abutment. The spring II 308c is sleeved on the vertical sliding rod 308b and is located between the abutment and the ear plate 308d. The limit switch 308e has a receiving end 309b and a sensing end. The receiving end 309b is set on the slide plate 305, and the sensing end is set on the vertical sliding rod 308b. When the spring II 308c is in the relaxed state, the abutment ring 308a is slightly lower than the height of the grinding head in the vertical direction. When the grinding head is pressed down, the contact ring 308a contacts the surface of the tank and compresses the spring II 308c. After the vertical slide rod 308b triggers the limit switch 308e, the PLC controls the cylinder 304 to stop. A position sensor 309 is installed on the column 302. (See details...) Figure 4 Its transmitter 309a emits infrared signals, and the receiver 309b is installed on the two arc-shaped supports 204 (or on the slider II 51) and the base frame 1 (at the midpoint of the two arc-shaped supports 204). The sensor 309 is used to locate the position of the column 302, so as to control the grinder 307 to move precisely to the grinding point.

[0032] The PLC control system is integrated into the control cabinet of the base frame 1. Servo motor 203, geared motor 402, cylinder 304, and sensors 207 / 308e / 309 are all connected to the PLC. The PLC controls the clamping, rotation, and grinding processes according to a preset program.

[0033] Clamping stage: The PLC starts the servo motor 203 to drive the lead screw 201 to rotate, and the arc supports on both sides 204 clamp the tank. The pressure sensor feeds back data to ensure that the clamping force is at the preset value.

[0034] Rotation and Grinding Stage: The geared motor 402 drives the tank to rotate. When the angle sensor 207 detects a 90° rotation signal, the PLC controls the linear slide 301 to move to the target position, such as the midpoint or symmetrical point. The cylinder 304 presses down the grinding head, and the limiting part 308 ensures that the grinding depth is ≤0.5mm.

[0035] This device utilizes a symmetrical clamping design with a lead screw 201 and double nuts 202 to minimize tank centering accuracy errors. The elastic push plate 205, in conjunction with a pressure sensor, ensures the clamping force remains within a preset value, protecting the tank surface coating. The limiting part 308 and position sensor 309 work together to ensure appropriate grinding depth at the grinding location. Furthermore, through modular design and PLC automated control, it achieves highly efficient pre-treatment for grinding the surface of large hydrogen storage tanks, reducing the processing time per tank to 10-15 minutes, more than four times more efficient than manual operation. This also avoids the risk of damage due to human error, significantly improving testing efficiency.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hydrogen storage tank testing apparatus characterized by comprising: The utility model provides a kind of polishing device for can body, including chassis (1), the clamping component (2) for supporting and clamping can body is arranged in the middle of the chassis (1), and the polishing component (3) is arranged in the side of the chassis (1); The clamping component (2) includes a lead screw (201), a nut (202) and an arc support (204), the lead screw (201) is formed with left and right thread, each nut (202) is arranged on each thread, the two nuts (202) move relative to each other when the lead screw (201) rotates, and each nut (202) is respectively provided with an arc support (204), the outer side of the arc support (204) is respectively provided with an elastic push plate (205). It also includes a driving component (4) for driving the rotation of the can body.

2. The hydrogen storage tank testing device according to claim 1, wherein The elastic push plate (205) includes a push plate body (205a), a movable shaft (205b) and a support arm (205c), one end of the support arm (205c) is connected to the arc support (204), the other end is provided with a spline sleeve (205d), one end of the movable shaft (205b) is rotatably connected to the push plate body (205a), the other end is provided with a spline and is slidably connected to the spline sleeve (205d), the end of the movable shaft (205b) away from the push plate body (205a) is provided with a anti-drop baffle, a spring I (205e) and a sandwiched gasket (205f) are sleeved on the movable shaft (205b), one end of the spring I (205e) abuts on the spline sleeve (205d), the other end abuts on the sandwiched gasket (205f), and the sandwiched gasket (205f) is tightly attached to the push plate body (205a).

3. The hydrogen storage tank testing device according to claim 2, wherein An angle sensor (207) is arranged on the side of the push plate body (205a) away from the sandwiched gasket (205f), the housing of the angle sensor (207) is connected to the push plate body (205a), and the measuring end is connected to the movable shaft (205b).

4. The hydrogen storage tank testing device according to claim 3, wherein A pressure sensor is arranged in the sandwiched layer of the sandwiched gasket (205f).

5. The hydrogen storage tank testing apparatus according to any one of claims 1 to 4, characterized by The driving component (4) includes a plurality of rollers (401) arranged circumferentially along the inner ring of the arc support (204), and a reduction motor (402) for driving the rotation of the rollers (401).

6. The hydrogen storage tank testing device according to claim 5, wherein The polishing component (3) includes a linear slide (301), the movable end of the linear slide (301) is provided with a stand (302), the upper end of the stand (302) is provided with a mounting plate, the mounting plate is provided with a vertical rail (303) and an air cylinder (304), the vertical rail (303) is provided with a sliding block I (306), the sliding block I (306) is provided with a sliding plate (305), the sliding plate (305) is provided with a polisher (307), and the air cylinder (304) is vertically arranged, and the telescopic rod is connected to the sliding plate (305).

7. The hydrogen storage tank testing device according to claim 6, wherein The sliding plate (305) is further provided with a limiting part (308), the limiting part (308) comprises an ear plate (308d), an abutting ring (308a), a vertical sliding rod (308b), a spring II (308c) and a limiting switch (308e), the abutting ring (308a) is coaxially arranged with the polishing head of the sander (307), the upper end of the abutting ring (308a) is provided with at least two vertically arranged vertical sliding rods (308b), the vertical sliding rod (308b) is slidably connected to the sliding plate (305) through the ear plate (308d), the upper end of the vertical sliding rod (308b) is provided with an abutting head, the spring II (308c) is sleeved on the vertical sliding rod (308b) and located between the abutting head and the ear plate (308d), the limiting switch (308e) has a receiving end (309b) and a sensing end, the receiving end (309b) of the limiting switch (308e) is arranged on the sliding plate (305), and the sensing end is arranged on the vertical sliding rod (308b), the spring II (308c) is in a relaxed state, and the abutting ring (308a) is slightly lower than the height of the polishing head in the vertical direction.

8. The hydrogen storage tank testing apparatus according to claim 7, wherein Further comprising a position sensor (309), comprising a transmitting end (309a) and a plurality of receiving ends (309b); The transmitting end (309a) is arranged on the stand column (302); The receiving ends (309b) are respectively arranged at the two arc-shaped supports (204) and the midpoints of the two arc-shaped supports (204).

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