Leak detection device for leakproofness of oil tank

Abstract

The utility model relates to the technical field of oil tank sealing, and provides an oil tank sealing leak detection device, which comprises a detection box, an air pump, a connecting pipe, a nitrogen detector and a cover plate, and is characterized in that the air pump is fixedly connected to the outer wall of the detection box, and the output end of the air pump is positioned in the detection box; the cover plate is hinged to the detection box, the connecting pipe is located on the inner wall of the cover plate and penetrates through the cover plate, the detection end of the nitrogen detector is connected with an exploring pipe, the exploring pipe is located in the connecting pipe, and the tail end of the connecting pipe is sleeved with an oil tank connecting cover. Nitrogen is used for testing the sealing of the oil tank, the detection cost is reduced, the detected gas is harmless and has little influence on the environment, through the arrangement of the air pump, the device detects the oil tank through high pressure, the device is more convenient to operate, the manufacturing cost of the device can be reduced under the condition that the detection precision is not reduced, and the detection efficiency is improved. And through arrangement of a push rod and a rubber contact body, the oil tank can be fixed in the detection box.

Description

Technical Field

[0001] This utility model belongs to the field of fuel tank sealing technology, specifically relating to a fuel tank sealing leak detection device. Background Technology

[0002] The fuel tank is a container used to store fuel in automobiles and other motor vehicles. It is not only an important part of the vehicle's fuel system, but also a key component to ensure vehicle safety and performance. Fuel tank sealing refers to a series of measures to ensure that the fuel tank and its related components (such as the fuel tank cap, filler neck, ventilation system, etc.) can effectively prevent fuel leakage and external contaminants from entering the fuel tank. Good fuel tank sealing is crucial for ensuring vehicle safety, protecting the environment, and maintaining vehicle performance.

[0003] A known authorized patent with application number 202121910343.3 discloses a fuel tank sealing helium leak detection system, comprising a leak detection device and a conveying device. The bottom of the leak detection device is fixedly connected to the top of the conveying device. The leak detection device includes a vacuum chamber, a sealing curtain, and a suction pipe. The conveying device includes a worktable and a lightweight substrate. A rotating plate is movably connected to the top of the worktable, and the top of the rotating plate is fixedly connected to the bottom of the lightweight substrate. This invention improves the flexibility of the sealing structure by adding an inflatable bladder and a lightweight substrate. The lightweight substrate and the inner inflatable bladder enhance the flexibility of the sealing structure. Furthermore, the vent valve and the inflation pipe can move within the lightweight substrate, making it suitable for different fuel tank seals and improving the detection efficiency of fuel tank helium leaks. By adding a suction pipe and an outlet pipe inside the vacuum chamber, the suction pipe draws in the scattered helium and the outlet pipe discharges it, allowing the operator to recover the helium and avoid waste.

[0004] However, the following problems were found in the implementation of the relevant technologies: Although helium is recovered to avoid waste, the recovery of helium is troublesome and affects work efficiency, and the use of helium to detect leaks in the fuel tank is dangerous.

[0005] Therefore, a fuel tank sealing leak detection device is proposed to solve the above problems. Utility Model Content

[0006] This utility model proposes a fuel tank sealing leak detection device, which solves the problems in related technologies where helium is recovered to avoid waste, but the recovery of helium is troublesome and affects work efficiency, and the use of helium to detect leaks in fuel tanks is somewhat dangerous.

[0007] The technical solution of this utility model is as follows: A fuel tank sealing leak detection device includes: a detection box, an air pump, a connecting pipe, a nitrogen detector and a cover plate, wherein the air pump is fixedly connected to the outer wall of the detection box and the output end of the air pump is located inside the detection box.

[0008] The cover plate is hinged to the detection box, the connecting pipe is located in the inner wall of the cover plate and penetrates the cover plate, the detection end of the nitrogen detector is connected with a probe pipe, the probe pipe is located in the inner part of the connecting pipe, and the end of the connecting pipe is sleeved with an oil tank connecting cover.

[0009] Preferably, the bottom of the detection box is provided with a gas vent, the bottom of the detection box is fixedly connected with an output pipeline, the output pipeline is communicated with the gas vent, the bottom of the detection box is fixedly connected with an electromagnetic valve, and the output pipeline is controlled by the electromagnetic valve.

[0010] Preferably, the outer wall of the detection box is fixedly connected with a plurality of connecting blocks, the outer wall of the cover plate is fixedly connected with a plurality of fixed blocks, the inner part of the fixed blocks is rotatably connected with a close bolt, the positions of the connecting blocks and the fixed blocks are corresponding to each other, and the outer wall of the cover plate is fixedly connected with a sealing strip.

[0011] Preferably, the inner wall of the detection box is fixedly connected with a plurality of clamping grooves, the inner wall of the clamping grooves is clamped with a placing plate, the inner wall of the detection box is fixedly connected with a plurality of push rods, and the output end of the push rods is fixedly connected with a rubber contact body.

[0012] Preferably, the bottom of the detection box is fixedly connected with a support column, the inner wall of the support column is fixedly connected with an equipment plate, the nitrogen detector is arranged on the upper wall of the equipment plate, and the nitrogen detector is an electrochemical pump suction type.

[0013] Preferably, the upper wall of the detection box is fixedly connected with a pressure gauge, and the input end of the air pump is provided with a nitrogen connecting part.

[0014] The working principle and beneficial effects of the utility model are as follows:

[0015] The nitrogen is used for testing the sealing of the oil tank, the detection cost is reduced, the detected gas is harmless and has little influence on the environment, the device is used for detecting the oil tank under high pressure through the setting of the air pump, the operation of the device is more convenient, the cost of the device can be reduced without reducing the detection precision, and the oil tank can be fixed in the detection box through the setting of the push rod and the rubber contact body. DRAWINGS

[0016] The utility model will be explained in further detail in combination with the drawings and specific embodiments.

[0017] Figure 1 The utility model provides a three-dimensional structure schematic diagram;

[0018] Figure 2 The utility model provides a three-dimensional structure schematic diagram;

[0019] Figure 3The side view structure schematic diagram provided by the utility model;

[0020] Figure 4 The bottom view structure schematic diagram provided by the utility model.

[0021] In the figure: 1, detection box; 2, air pump; 3, connecting pipe; 4, nitrogen detector; 5, probe pipe; 6, oil tank connecting cover; 7, cover plate; 8, tightly closed bolt; 9, sealing strip; 10, fixed block; 11, connecting block; 12, air vent; 13, electromagnetic valve; 14, output pipeline; 15, pressure gauge; 16, nitrogen connection; 17, placing plate; 18, clamping groove; 19, push rod; 20, rubber contact; 21, support column; 22, equipment plate. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model.

[0023] EMBODIMENT

[0024] Please refer to Figure 1 -4, an oil tank sealing leak detection device, comprising: detection box 1, air pump 2, connecting pipe 3, nitrogen detector 4 and cover plate 7, air pump 2 is fixedly connected to the outer wall of detection box 1, and the output end of air pump 2 is located in the inside of detection box 1;

[0025] Cover plate 7 is hinged to detection box 1, connecting pipe 3 is located in the inner wall of cover plate 7 and penetrates cover plate 7, the detection end of nitrogen detector 4 is connected with probe pipe 5, probe pipe 5 is located in the inside of connecting pipe 3, and oil tank connecting cover 6 is sleeved at the end of connecting pipe 3.

[0026] The technical scheme provided by the embodiment is as follows: first, connect the nitrogen source to the nitrogen connection 16, then place the oil tank on the upper wall of the placing plate 17, then push it into the inside of the detection box 1, next, start the push rod 19 to fix the position of the oil tank, then connect the oil tank connection cover 6 to the oil tank, next, close the cover plate 7, when closing, rotate the close bolt 8 to threadedly connect the connecting block 11 with the end of the close bolt 8, the sealing strip 9 increases the air tightness of the device, next, extend the probe tube 5 of the nitrogen detector 4 into the inside of the connecting pipe 3, then open the electromagnetic valve 13 and start the air pump 2, the air pump 2 injects nitrogen into the detection box 1 and extrudes the air in the inside of the detection box 1, after ten to thirty seconds, close the electromagnetic valve 13, after the electromagnetic valve 13 is closed, the air pump 2 continuously injects nitrogen into the inside of the detection box 1, and the air pressure increases, the air pressure is monitored through the pressure gauge 15, the air pressure range is between +50KPa and +100KPa, when exceeding, the air pump 2 should be closed in time, if the oil tank leaks, because the oil tank connection cover 6 is communicated with the connecting pipe 3, there is a certain air pressure difference, nitrogen will enter the inside of the oil tank, at this time, the nitrogen detector 4 monitors the nitrogen content in the oil tank in real time through the probe tube 5, if it is detected that the nitrogen in the inside of the oil tank abnormally fluctuates, it can be determined that the oil tank leaks, if there is no abnormal fluctuation after a period of time, it can be determined that the oil tank does not leak, after the detection is completed, open the electromagnetic valve 13 to release the pressure of the detection box 1, and the end of the output pipeline 14 should be in an open space.

[0027] Further, the bottom of the detection box 1 is provided with a gas outlet 12, the bottom of the detection box 1 is fixedly connected with an output pipeline 14, the output pipeline 14 is communicated with the gas outlet 12, the bottom of the detection box 1 is fixedly connected with an electromagnetic valve 13, and the output pipeline 14 is controlled by the electromagnetic valve 13.

[0028] Specifically, the output pipeline 14 and the electromagnetic valve 13 are arranged, so that the gas in the inside of the detection box 1 can be discharged in time, the air in the inside is discharged before detection, and the nitrogen in the inside of the detection box 1 is discharged after detection is completed.

[0029] Further, the outer wall of the detection box 1 is fixedly connected with a plurality of connecting blocks 11, the outer wall of the cover plate 7 is fixedly connected with a plurality of fixed blocks 10, the fixed blocks 10 are rotatably connected with close bolts 8 in the inside, the connecting blocks 11 correspond to the fixed blocks 10 in position, and the outer wall of the cover plate 7 is fixedly connected with a sealing strip 9.

[0030] Specifically, the connecting blocks 11 and the fixed blocks 10 are arranged, so that the connection between the cover plate 7 and the detection box 1 is more close, and the sealing strip 9 increases the air tightness of the device.

[0031] Further, the inner wall of the detection box 1 is fixedly connected with a plurality of clamping grooves 18, the inner wall of the clamping groove 18 is clamped with a placing plate 17, the inner wall of the detection box 1 is fixedly connected with a plurality of push rods 19, and the output end of the push rod 19 is fixedly connected with a rubber contact 20.

[0032] Specifically, the placing plate 17 and the push rod 19 are arranged, so that the oil tank can be fixed in the detection box 1, and the detection is more accurate.

[0033] Further, the bottom of the detection box 1 is fixedly connected with a support 21, the inner wall of the support 21 is fixedly connected with a device plate 22, the nitrogen detector 4 is arranged on the upper wall of the device plate 22, and the nitrogen detector 4 is an electrochemical pump type.

[0034] Specifically, the electrochemical pump type nitrogen detector 4 is more accurate during detection, and the detection point can be fixed and extended through the probe pipe 5.

[0035] Further, the upper wall of the detection box 1 is fixedly connected with a pressure gauge 15, and the input end of the air pump 2 is provided with a nitrogen connecting portion 16.

[0036] Specifically, the pressure gauge 15 can directly know the air pressure in the detection box 1, so as to avoid damage of the oil tank caused by high air pressure, and the nitrogen connecting portion 16 is connected with the air pump 2, so that the detection box 1 can be filled with high-pressure nitrogen.

[0037] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An oil tank tightness leak detection device, comprising: The utility model relates to a nitrogen gas detection device, including detection box (1), air pump (2), connecting pipe (3), nitrogen gas detector (4) and cover plate (7), its characterized in be, air pump (2) fixedly connected in the outer wall of detection box (1), the output end of air pump (2) is located in the inside of detection box (1), The cover plate (7) is hinged with the detection box (1), the connecting pipe (3) is located in the inner wall of the cover plate (7), and penetrates the cover plate (7), the detection end of the nitrogen gas detector (4) is connected with the probe tube (5), the probe tube (5) is located in the inside of the connecting pipe (3), the end of the connecting pipe (3) is sleeved with the oil tank connecting cover (6).

2. An oil tank tightness leak detection device according to claim 1, characterized in that: The bottom of the detection box (1) is provided with a gas vent (12), the bottom of the detection box (1) is fixedly connected with an output pipeline (14), the output pipeline (14) is communicated with the gas vent (12), the bottom of the detection box (1) is fixedly connected with an electromagnetic valve (13), and the output pipeline (14) is controlled by the electromagnetic valve (13).

3. An oil tank tightness leak detection device according to claim 1, characterized in that: The outer wall of the detection box (1) is fixedly connected with a plurality of connecting blocks (11), the outer wall of the cover plate (7) is fixedly connected with a plurality of fixed blocks (10), the inside of the fixed block (10) is rotatably connected with a tightly closed bolt (8), the positions of the connecting block (11) and the fixed block (10) correspond to each other, and the outer wall of the cover plate (7) is fixedly connected with a sealing strip (9).

4. An oil tank tightness leak detection device according to claim 1, characterized in that: The inner wall of the detection box (1) is fixedly connected with a plurality of clamping grooves (18), the inner wall of the clamping groove (18) is clamped with a placing plate (17), the inner wall of the detection box (1) is fixedly connected with a plurality of push rods (19), and the output end of the push rod (19) is fixedly connected with a rubber contact body (20).

5. An oil tank tightness leak detection device according to claim 1, characterized in that: The bottom of the detection box (1) is fixedly connected with a support column (21), the inner wall of the support column (21) is fixedly connected with an equipment plate (22), the nitrogen gas detector (4) is arranged on the upper wall of the equipment plate (22), and the nitrogen gas detector (4) is an electrochemical pump suction type.

6. An oil tank tightness leak detection device according to claim 1, characterized in that: The upper wall of the detection box (1) is fixedly connected with a pressure gauge (15), and the input end of the air pump (2) is provided with a nitrogen gas connecting portion (16).

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