CN210893566U

CN210893566U - Fuel tank airtightness detection device

Info

Publication number: CN210893566U
Application number: CN201922158195.3U
Authority: CN
Inventors: 郭旭; 郝建华; 何中顺; 刘孜; 廖中华
Original assignee: Chongqing Shuangwu Auto Parts Co ltd
Current assignee: LUZHOU DEVELOPING MACHINERY Co.,Ltd.
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-06-30
Anticipated expiration: 2029-12-05

Abstract

The utility model belongs to the technical field of the fuel tank detects the frock and specifically relates to a convenient realization fuel tank breather pipe and adds oil pipe welding gas tightness and detect in advance to avoid the whole condemned airtight detection device of fuel tank, including pedestal assembly and airtight detection assembly, wherein, pedestal assembly includes the pedestal frame, airtight detection assembly sets up on the pedestal frame, airtight detection assembly includes the cylinder assembly, sets up in the cylinder end cap of cylinder assembly bottom and with main gas piping connection's air chamber trachea. Once insufficient sealing of the weld occurs, soapy water can form bubbles due to the escaping gas. If the air bubbles do not appear, the welding effect of the vent pipe and the oil filling pipe is ideal. Through detecting the welding effect of breather pipe and oil filler pipe in advance, prevented that subsequent whole fuel tank from scrapping to production efficiency has been improved. The utility model discloses be particularly useful for among the fuel tank welding gas tightness detects.

Description

Fuel tank airtightness detection device

Technical Field

The utility model belongs to the technical field of fuel tank detection frock and specifically relates to an airtight detection device of fuel tank.

Background

The oil gas emission from gasoline has great harm to human health, and simultaneously wastes a great deal of resources. With the rapid development of economy in recent years in China, the annual sales volume of automobiles and the total social preservation volume of automobiles are increased rapidly, and the environmental air quality in China is urgently to be further improved. According to the existing improvement requirement, a gravity valve and a vent valve of a fuel tank are required to be built in, namely, a valve body is assembled in advance into the fuel tank before the upper shell and the lower shell of the fuel tank are combined, because the vent pipe and the oil filling pipe are connected through rubber pipe fittings, if the airtightness is not detected in advance, repair welding is required after the air tightness of the vent pipe and the oil filling pipe is detected out after the fuel tank is combined, and because the vent pipe and the oil filling pipe are connected with the rubber pipe, the metal heat transfer can cause the burning of the rubber pipe, thereby causing huge loss of the whole fuel tank.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a convenient realization fuel tank breather pipe and add oil pipe welding gas tightness and detect in advance is provided to avoid the whole condemned airtight detection device of fuel tank.

The utility model provides a technical scheme that its technical problem adopted is: the fuel tank airtightness detection device comprises a base frame assembly and an airtightness detection assembly, wherein the base frame assembly comprises a base frame, the airtightness detection assembly is arranged on the base frame, and the airtightness detection assembly comprises a cylinder assembly, a cylinder plug arranged at the bottom of the cylinder assembly and an air chamber air pipe connected with a main air pipe.

Further, the air pressure control device comprises a flow air pressure control valve, and the flow air pressure control valve is arranged on an air pipe of the air chamber.

The air cylinder assembly is characterized by further comprising an air cylinder reversing valve, an air cylinder down stroke air pipe and an air cylinder up stroke air pipe, wherein one end of the air cylinder down stroke air pipe and one end of the air cylinder up stroke air pipe are communicated with the air cylinder assembly, the other end of the air cylinder down stroke air pipe and the other end of the air cylinder up stroke air pipe are communicated with the air cylinder reversing valve, the air cylinder reversing valve is communicated with the main air pipe, and the air cylinder down stroke air pipe and the air cylinder up stroke air pipe respectively drive an air cylinder plug to move downwards or upwards through the air.

Further, the bottom of the pedestal is provided with rollers.

Furthermore, the number of the idler wheels is four, two of the idler wheels are positioning wheels, and the other two idler wheels are universal wheels.

Further, a base reinforcing rib is arranged between the base frame and the airtight detection assembly.

Further, sealing rubber matched with the air chamber to be detected is arranged in the cylinder plug.

The utility model has the advantages that: in actual use, firstly, the fuel tank with the welding effect of the vent pipe and the oil filling pipe to be detected is placed at a position convenient for detection. Then, the air chamber of the air pipe or the oil filling pipe is sealed by the air cylinder plug, then, air is input into the air chamber through an air pipe of the air chamber, certain liquid such as soapy water is smeared around the air pipe and the oil filling pipe to be detected, and once the welding tightness is not enough, bubbles caused by gas escape can occur in the soapy water. If the air bubbles do not appear, the welding effect of the vent pipe and the oil filling pipe is ideal. Through detecting the welding effect of breather pipe and oil filler pipe in advance, prevented that subsequent whole fuel tank from scrapping to production efficiency has been improved. The utility model discloses be particularly useful for among the fuel tank welding gas tightness detects.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a sectional view a-a of fig. 2.

Fig. 5 is a partially enlarged view B of fig. 4.

Labeled as: the device comprises a base frame 1, rollers 2, base reinforcing ribs 3, a cylinder assembly 4, a cylinder reversing valve 5, a flow air pressure control valve 6, a main air pipe 7, a cylinder lower stroke air pipe 8, a cylinder upper stroke air pipe 9, an air chamber air pipe 10, a cylinder plug 11, a workpiece to be detected 12 and an air chamber 13.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The fuel tank airtightness detection device shown in fig. 1, 2, 3, 4 and 5 comprises a pedestal frame assembly and an airtightness detection assembly, wherein the pedestal frame assembly comprises a pedestal frame 1, the airtightness detection assembly is arranged on the pedestal frame 1, and the airtightness detection assembly comprises a cylinder assembly 4, a cylinder plug 11 arranged at the bottom of the cylinder assembly 4, and an air chamber air pipe 10 connected with a main air pipe 7.

Wherein, the relevant parameters of the pedestal 1 need to be matched with the oil tank, namely the workpiece 12 to be detected, so that the batch detection efficiency is higher. During actual detection, the upper shell of the oil tank, on which the vent pipe and the oil filling pipe are welded, is vertically placed on the fuel tank air-tightness detection device, and air-tightness detection is respectively carried out on the vent pipe and the oil filling pipe. During detection, the air chamber 13 corresponding to the air pipe or the oil filling pipe is blocked and sealed by the air cylinder plug 11, gas is introduced into the air pipe or the oil filling pipe through the air chamber air pipe 10, once bubbles appear in soapy water smeared on the periphery of the air pipe or the oil filling pipe, it can be judged that welding cannot meet the requirement, and if no bubbles appear in the soapy water, welding can meet the requirement. The utility model discloses can effectively avoid the fuel tank to carry out repair welding after the airtight detection of upper and lower casing mould assembling, breather pipe, the damaged condition that leads to the fuel tank scrapping of oil pipe heat conduction connecting pipe of adding oil pipe. For structural stability, a base reinforcing rib 3 is preferably provided between the base frame 1 and the airtightness detection assembly.

In order to flexibly control the air pressure in the air chamber 13, a flow air pressure control valve 6 may be additionally provided, and the flow air pressure control valve 6 is provided on the air chamber air pipe 10. As shown in fig. 3, the flow air pressure control valve 6 is adjusted so that the air pressure of the air output from the air chamber 10 is at a reasonable level for detection.

In order to realize the up-and-down stroke of the cylinder plug 11 and further conveniently realize the sealing of the air chamber 13, the following scheme can be selected: the pneumatic cylinder down stroke air pipe and pneumatic cylinder up stroke air pipe driving device comprises an air cylinder reversing valve 5, an air cylinder down stroke air pipe 8 and an air cylinder up stroke air pipe 9, wherein one end of the air cylinder down stroke air pipe 8 and one end of the air cylinder up stroke air pipe 9 are communicated with an air cylinder assembly 4, the other end of the air cylinder down stroke air pipe 8 and the other end of the air cylinder up stroke air pipe 9 are communicated with the air cylinder reversing valve 5, the air cylinder reversing valve 5 is communicated with a main air pipe 7, and the air cylinder down stroke air pipe 8 and the air cylinder up stroke air pipe 9 respectively drive an. The main air pipe 7 is generally connected with a factory air pipe, and not only serves as an air source for conveying air to the room air pipe 10, but also serves as a power source for driving the air cylinder plug 11 to move downwards or upwards. The cylinder lower stroke air pipe 8 and the cylinder upper stroke air pipe 9 respectively drive the cylinder plug 11 to move downwards or upwards through the cylinder assembly 4, and therefore the movement of the cylinder plug 11 is achieved. Generally, the cylinder reversing valve 5 needs to be arranged behind the cylinder assembly 4, so that the problem of safety caused by cylinder movement due to mistaken collision is avoided, and preferably, the cylinder feeding movement is manually controlled and operated, so that the safety is ensured.

In order to move the base frame 1 conveniently, the bottom of the base frame 1 is preferably provided with four rollers 2, and in practical use, the rollers 2 are preferably four, two of the rollers are positioning wheels, and the other two rollers are universal wheels, so that the flexibility of direction can be realized, and the stability in use is also ensured.

Because the rubber in the air chamber 13 of the fuel tank filler pipe and the vent pipe is frequently contacted with the rubber of the cylinder plug 11, the cylinder plug 11 is preferably internally provided with sealing rubber matched with the air chamber 13 to be detected. The cylinder plug 11 and the air chamber 13 are manufactured to meet the size of a rubber standard component, and the condition of the rubber component needs to be checked frequently to ensure that the detection process is accurate and has no leakage.

Claims

1. Airtight detection device of fuel tank, its characterized in that: including pedestal assembly and airtight detection assembly, wherein, pedestal assembly includes pedestal frame (1), airtight detection assembly sets up on pedestal frame (1), airtight detection assembly includes cylinder assembly (4), sets up in cylinder end cap (11) of cylinder assembly (4) bottom and air chamber trachea (10) of being connected with main trachea (7).

2. The fuel tank airtightness detecting apparatus according to claim 1, wherein: the device comprises a flow air pressure control valve (6), wherein the flow air pressure control valve (6) is arranged on an air chamber air pipe (10).

3. The fuel tank airtightness detection apparatus according to claim 1 or 2, wherein: including cylinder switching-over valve (5), cylinder down stroke trachea (8) and cylinder upstroke trachea (9), the one end and cylinder assembly (4) intercommunication of cylinder down stroke trachea (8) and cylinder upstroke trachea (9), cylinder down stroke trachea (8) and cylinder upstroke trachea (9) other end and cylinder switching-over valve (5) intercommunication, cylinder switching-over valve (5) and main trachea (7) intercommunication, wherein, cylinder down stroke trachea (8) and cylinder upstroke trachea (9) drive cylinder end cap (11) down or go upward through cylinder assembly (4) respectively.

4. The fuel tank airtightness detection apparatus according to claim 1 or 2, wherein: the bottom of the base frame (1) is provided with rollers (2).

5. The fuel tank airtightness detecting apparatus according to claim 4, wherein: the number of the idler wheels (2) is four, two of the idler wheels are positioning wheels, and the other two idler wheels are universal wheels.

6. The fuel tank airtightness detection apparatus according to claim 1 or 2, wherein: and a base reinforcing rib (3) is arranged between the base frame (1) and the airtight detection assembly.

7. The fuel tank airtightness detection apparatus according to claim 1 or 2, wherein: and sealing rubber matched with the air chamber (13) to be detected is arranged in the cylinder plug (11).