Oil tank leakage detection device

Abstract

The utility model discloses an oil tank leakage detection device, comprising an oil tank cover which is matched with an oil filling port of an oil tank to be detected and is provided with an air inlet and an air outlet; the inflating equipment is connected with the air inlet and is used for inflating the to-be-tested oil tank; the air pressure switch is connected with the air outlet and can control on-off of a circuit according to air pressure change in the to-be-tested oil tank; the indicating lamp assembly comprises an indicating lamp and a power supply, and the indicating lamp, the power supply and the air pressure switch are electrically connected and can form a closed loop; the oil tank leakage detection device provided by the utility model can accurately judge whether the oil tank leaks oil or not, is simple in structure, low in cost and convenient to carry, and can be beneficial to improving the use convenience.

Description

Technical Field

[0001] The utility model relates to the technical field of detection device design, in particular to an oil tank leakage detection device. Background Art

[0002] Before leaving the factory, vehicles undergo comprehensive testing for air tightness and other aspects of their fuel tanks to ensure product compliance. However, fuel tank leakage remains a common problem over the long term. Fuel tank leaks can be caused by a variety of factors, including loose drain bolts, damaged fuel tanks or fuel lines, damaged oil seals, and repair issues. Trucks with externally mounted fuel tanks are particularly susceptible to impact from foreign objects, leading to the risk of fuel leaks. Fuel tank leaks not only waste resources but also affect vehicle mileage and the driving experience. Currently, fuel tank leaks are typically detected by smelling, checking for oil stains, and feeling for dampness. However, due to residual stains on the fuel tank surface and the presence of small amounts of fuel evaporating from the fuel cap, traditional methods of smelling, looking, and feeling are not effective for accurately diagnosing minor leaks. Alternatively, specialized airtightness testing equipment or a repair station can be used for testing. However, specialized airtightness testing equipment is expensive, difficult to carry around, and inconvenient to use at a repair station.

[0003] Therefore, there is an urgent need to provide a fuel tank leakage detection device that can accurately determine whether the fuel tank is leaking. At the same time, the fuel tank leakage detection device is required to have a simple structure, low cost, and be easy to carry, so as to improve the convenience of use. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a fuel tank leakage detection device, which can accurately determine whether the fuel tank is leaking. At the same time, it has a simple structure, low cost, and is easy to carry, which can help improve the convenience of use.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fuel tank leakage detection device, comprising: a fuel tank cap, adapted to be arranged with the filling port of the fuel tank to be tested and provided with an air inlet and an air outlet; an inflation device, connected to the air inlet for inflating the fuel tank to be tested; an air pressure switch, connected to the air outlet and capable of controlling the on / off of a circuit by changes in the air pressure in the fuel tank to be tested; an indicator light assembly, comprising an indicator light and a power supply, wherein the indicator light, power supply and air pressure switch are electrically connected and can form a closed circuit.

[0006] Furthermore, the air pressure switch includes a cylinder body, a conductive piston and a reset member. The cylinder body is provided with a first wiring portion and a second wiring portion that can be controlled by the movement of the conductive piston to switch on and off. The conductive piston divides the cylinder body into an upper chamber and a lower chamber. The reset member is arranged in the upper chamber to provide a reset force for the conductive piston. The lower chamber is connected to the air outlet through a pipe.

[0007] Furthermore, the cylinder body is formed by butting and fixing the shell I and the shell II.

[0008] Furthermore, the fixed inner sleeve of the shell II is provided with a conductive sleeve, the second wiring part is a conductive block II embedded in the shell II, and the conductive block II is in contact with the conductive sleeve; the conductive piston is slidingly arranged in the shell I, the first wiring part is a conductive block I embedded in the side wall of the shell I and can contact the conductive piston, a piston rod is integrally formed on the conductive piston, and the piston rod is slidingly arranged in the conductive sleeve, and the reset member is a compression spring with an outer sleeve arranged on the piston rod.

[0009] Furthermore, the conductive block I, the conductive block II, the conductive piston and the conductive sleeve are all made of copper.

[0010] Furthermore, a sealing ring is provided on the outer sleeve of the conductive piston.

[0011] Furthermore, the inflation device is an air pump.

[0012] Furthermore, an air intake hose is provided at the air inlet, an air valve is provided at the inlet end of the air intake hose, and the air pump is connected to the air valve.

[0013] Furthermore, the indicator light is a light emitting diode, and the power source is a battery.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The oil tank leakage detection device provided by the utility model can accurately determine whether the oil tank is leaking. At the same time, it has a simple structure, low cost, and is easy to carry, which can help improve the convenience of use.

[0016] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model

[0018] Figure 2 This is a schematic diagram of the axonometric structure of the utility model after removing the inflation device

[0019] Figure markings: 1-fuel tank cap; 101-air inlet; 102-air outlet; 2-inflating device; 3-air pressure switch; 3a-upper chamber; 3b-lower chamber; 301-cylinder body; 301a-housing I; 301b-housing II; 301b1-conductive sleeve; 302-conductive piston; 302a-piston rod; 302b-sealing ring; 303-reset member; 304-first wiring part; 305-second wiring part; 4-indicator light assembly; 401-indicator light; 402-power supply; 5-pipe fitting; 6-intake hose; 601-valve nozzle. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0021] See also Figure 1-2 , this embodiment discloses a fuel tank leakage detection device, comprising: a fuel tank cap 1, which is adapted to be arranged with the refueling port of the fuel tank to be tested and is provided with an air inlet 101 and an air outlet 102. It can be understood that the adaptation of the fuel tank cap 1 to the refueling port of the fuel tank to be tested here means that the fuel tank cap 1 can be installed in a matching manner with the refueling port of the fuel tank to be tested to ensure that the refueling port of the fuel tank to be tested can be sealed, which depends on the structure of the refueling port of the fuel tank to be tested; an inflation device 2, which is connected to the air inlet 101 and is used to inflate the fuel tank to be tested. The inflation device 2 can be of various types, and an air pump is preferably used; an air pressure switch 3, which is connected to the air outlet 102 and can control the circuit to be turned on and off by the air pressure change in the fuel tank to be tested. Usually, the air inlet end of the air pressure switch 3 is connected through a pipe. Connected to the air outlet 102; the indicator light assembly 4 includes an indicator light 401 and a power supply 402, and the indicator light 401, the power supply 402 and the air pressure switch 3 are electrically connected to form a closed circuit; it can be understood that the indicator light 401, the power supply 402 and the air pressure switch 3 are connected accordingly through ordinary wires, and when the air pressure switch 3 is closed, a closed circuit is formed; it should be noted that the air pressure switch usually adopts a spring mechanical structure. When the air pressure exceeds or falls below the set value, the spring of the mechanical structure will be displaced, thereby causing the contacts of the switch to change. The change of the contacts can switch the on-off state of the circuit, thereby controlling the operation or stop of the indicator light 401. The specific structure of the air pressure switch 3 is not limited here;

[0022] The fuel tank leakage detection device provided in the above structure can accurately determine whether the fuel tank is leaking. At the same time, it has a simple structure, low cost, and is easy to carry, which can help improve the convenience of use. Specifically, it can determine whether the fuel tank is leaking in the following way: a certain amount of gas is filled into the fuel tank to be tested through the air inlet 101 by the inflation device 2, so that the air pressure in the fuel tank to be tested increases until the air pressure switch 3 is closed and the indicator light 401 is on; then the inflation is stopped, and a certain time interval, such as 10-20 minutes, etc., if there is no leakage in the fuel tank, the indicator light 401 remains on. On the contrary, if the indicator light 401 is off, it means that there is a leak in the fuel tank and the air tightness is not good; the device can accurately determine the air tightness of the fuel tank and can be used for minor leak detection of the fuel tank; by observing the working condition of the indicator light 401, whether there is a leak is determined, which is easy to observe, easy to operate, and also suitable for use at night; the overall device has a simple structure, low cost, and is easy to market; the overall volume is small and easy to carry with the vehicle.

[0023] In this embodiment, the air pressure switch 3 includes a cylinder body 301, a conductive piston 302 and a reset member 303. The cylinder body 301 is provided with a first connection portion 304 and a second connection portion 305 that can be moved by the conductive piston 302 to control the on and off. The conductive piston 302 divides the cylinder body 301 into an upper chamber 3a and a lower chamber 3b. The reset member 303 is provided in the upper chamber 3a to provide a reset force for the conductive piston 302. The lower chamber 3b is connected to the air outlet 102 through a pipe 5. Specifically, The first wiring part 304 and the second wiring part 305 preferably use copper contacts and can be connected to the circuit through wires; the reset member 303 here preferably uses a reset spring; the cylinder body 301 and the conductive piston 302 are installed in a sliding fit, which will not be described here. The on-off control of the first wiring part 304 and the second wiring part 305 is achieved by the displacement of the conductive piston 302; the air pressure switch 3 structure in this structural design has a simple structure, good sealing performance, no leakage itself, and a reliable detection structure, which is conducive to further reducing production costs and practicality.

[0024] In this embodiment, the cylinder body 301 is formed by docking and fixing the shell I 301a and the shell II 301b. Specifically, the shell I 301a and the shell II 301b can be welded and fixed, or connected by threaded sealing, which is beneficial to simplifying the structure of the air pressure switch 3, facilitating processing and manufacturing, and further reducing costs.

[0025] In this embodiment, the fixed inner sleeve of the shell II 301b is provided with a conductive sleeve 301b1, and the second wiring portion 305 is a conductive block II embedded in the shell II 301b, and the conductive block II is in contact with the conductive sleeve 301b1. Specifically, the conductive sleeve 301b1 is fixed to the shell II 301b by interference fit, and the conductive sleeve 301b1 and the conductive block II are preferably made of copper; the conductive piston 302 is slidably provided in the shell I 301a, and the first wiring portion 304 is embedded in the side wall of the shell I 301a and can be connected to the conductive piston 3 02 contacted conductive block I, the conductive piston 302 is integrally formed with a piston rod 302a. It can be understood that the piston rod 302a is also conductive, and the piston rod 302a is slidingly fitted in the conductive sleeve 301b1, and the reset member 303 is a compression spring with an outer sleeve arranged on the piston rod 302a; in this structural design, the conductive block II and the conductive block I serve as the wiring parts, which is conducive to wiring and ensuring the sealing of the overall structure; the structure is simple and reliable, and the contact effect of the conductive sleeve 301b1, the conductive block II, the conductive block I and the conductive piston 302 is good.

[0026] In this embodiment, the conductive block I, the conductive block II, the conductive piston 302 and the conductive sleeve 301b1 are all made of copper. Copper parts have good electrical conductivity and are conducive to reducing the failure rate.

[0027] In this embodiment, the conductive piston 302 is provided with a sealing ring 302b on its outer sleeve. The sealing ring 302b can be a rubber sealing ring. The sealing ring 302b is provided to form a dynamic seal, which can effectively reduce the gas leakage in the upper chamber 3a and the lower chamber 3b and reduce the failure rate.

[0028] In this embodiment, the inflation device 2 is an air pump, which can be an electric air pump or a manual air pump. The air pump is small in size and cheap in price, which helps to further reduce costs and improve ease of use.

[0029] In this embodiment, an air intake hose 6 is provided at the air inlet 101, and an air valve 601 is provided at the inlet end of the air intake hose 6, and the air pump is connected to the air valve 601; the length of the air intake hose 6 can be set as needed, and the setting of the air intake hose 6 and the air valve 601 facilitates the connection of the air pump and simplifies the operation; the air valve 601 can also effectively prevent air leakage at the connection part.

[0030] In this embodiment, the indicator light 401 is a light-emitting diode, and the power supply 402 is a battery. The battery can be fixed on the housing of the air pressure switch through a battery mounting bracket. The connection and installation of the light-emitting diode and the battery are existing technologies and will not be repeated here. The use of light-emitting diodes has low energy consumption, energy saving, optional luminous colors, and is conducive to observation. The use of batteries as power sources is easy to install and convenient to use.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fuel tank leakage detection device, characterized in that: include: A fuel tank cap (1) is adapted to fit the fuel filling port of the fuel tank to be tested and is provided with an air inlet (101) and an air outlet (102); An air charging device (2) connected to the air inlet (101) for charging the oil tank to be tested; An air pressure switch (3) is connected to the air outlet (102) and can control the circuit to be turned on and off by the air pressure change in the oil tank to be tested; The indicator light assembly (4) comprises an indicator light (401) and a power source (402). The indicator light (401), the power source (402) and the air pressure switch (3) are electrically connected to form a closed loop.

2. The fuel tank leakage detection device according to claim 1, characterized in that: The air pressure switch (3) comprises a cylinder body (301), a conductive piston (302) and a reset member (303). The cylinder body (301) is provided with a first connection portion (304) and a second connection portion (305) that can be moved and controlled by the conductive piston (302) to switch on and off. The conductive piston (302) divides the cylinder body (301) into an upper chamber (3a) and a lower chamber (3b). The reset member (303) is arranged in the upper chamber (3a) to provide a reset force for the conductive piston (302). The lower chamber (3b) is connected to the air outlet (102) via a pipe (5).

3. The fuel tank leakage detection device according to claim 2, characterized in that: The cylinder body (301) is formed by butting and fixing a shell I (301a) and a shell II (301b).

4. The fuel tank leakage detection device according to claim 3, characterized in that: The fixed inner sleeve of the housing II (301b) is provided with a conductive sleeve (301b1); the second wiring portion (305) is a conductive block II embedded in the housing II (301b); the conductive block II is in contact with the conductive sleeve (301b1); The conductive piston (302) is slidably arranged in the shell I (301a), the first wiring portion (304) is a conductive block I embedded in the side wall of the shell I (301a) and capable of contacting the conductive piston (302), a piston rod (302a) is integrally formed on the conductive piston (302), the piston rod (302a) is slidably arranged in the conductive sleeve (301b1), and the reset member (303) is a compression spring with an outer sleeve arranged on the piston rod (302a).

5. The fuel tank leakage detection device according to claim 4, characterized in that: The conductive block I, the conductive block II, the conductive piston (302) and the conductive sleeve (301b1) are all made of copper.

6. The fuel tank leakage detection device according to claim 4, characterized in that: The conductive piston (302) is provided with a sealing ring (302b) on its outer sleeve.

7. The fuel tank leakage detection device according to claim 1, characterized in that: The inflation device (2) is an air pump.

8. The fuel tank leakage detection device according to claim 7, characterized in that: An air intake hose (6) is provided at the air intake port (101), an air valve (601) is provided at the inlet end of the air intake hose (6), and the air pump is connected to the air valve (601).

9. The fuel tank leakage detection device according to claim 1, characterized in that: The indicator light (401) is a light emitting diode, and the power source (402) is a battery.

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